From af245d115bfab4eb0ca1b969b2aae6f84eb90706 Mon Sep 17 00:00:00 2001 From: Todd Fiala Date: Mon, 30 Jun 2014 21:05:18 +0000 Subject: [PATCH] Add lldb-gdbserver support for Linux x86_64. This change brings in lldb-gdbserver (llgs) specifically for Linux x86_64. (More architectures coming soon). Not every debugserver option is covered yet. Currently the lldb-gdbserver command line can start unattached, start attached to a pid (process-name attach not supported yet), or accept lldb attaching and launching a process or connecting by process id. The history of this large change can be found here: https://github.com/tfiala/lldb/tree/dev-tfiala-native-protocol-linux-x86_64 Until mid/late April, I was not sharing the work and continued to rebase it off of head (developed via id tfiala@google.com). I switched over to user todd.fiala@gmail.com in the middle, and once I went to github, I did merges rather than rebasing so I could share with others. llvm-svn: 212069 --- lldb/.gitignore | 3 + lldb/docs/lldb-gdb-remote.txt | 2 +- lldb/include/lldb/Core/UserID.h | 6 +- lldb/include/lldb/Host/Debug.h | 244 +- lldb/include/lldb/Host/Host.h | 3 + lldb/include/lldb/Target/MemoryRegionInfo.h | 1 + lldb/include/lldb/Target/NativeRegisterContext.h | 190 + .../Target/NativeRegisterContextRegisterInfo.h | 44 + lldb/include/lldb/Target/Platform.h | 64 + lldb/include/lldb/Target/Process.h | 11 + lldb/include/lldb/lldb-enumerations.h | 21 + lldb/include/lldb/lldb-private-enumerations.h | 10 + lldb/include/lldb/lldb-private-forward.h | 39 + lldb/lldb.xcodeproj/project.pbxproj | 86 +- lldb/source/Core/ModuleList.cpp | 1 + lldb/source/Expression/IRMemoryMap.cpp | 7 +- lldb/source/Host/common/CMakeLists.txt | 5 + lldb/source/Host/common/NativeBreakpoint.cpp | 116 + lldb/source/Host/common/NativeBreakpoint.h | 66 + lldb/source/Host/common/NativeBreakpointList.cpp | 199 + lldb/source/Host/common/NativeBreakpointList.h | 53 + lldb/source/Host/common/NativeProcessProtocol.cpp | 397 ++ lldb/source/Host/common/NativeProcessProtocol.h | 321 ++ lldb/source/Host/common/NativeThreadProtocol.cpp | 97 + lldb/source/Host/common/NativeThreadProtocol.h | 85 + lldb/source/Host/common/SoftwareBreakpoint.cpp | 296 ++ lldb/source/Host/common/SoftwareBreakpoint.h | 51 + lldb/source/Host/linux/Host.cpp | 6 + .../Plugins/DynamicLoader/POSIX-DYLD/AuxVector.cpp | 9 +- .../DynamicLoader/POSIX-DYLD/DYLDRendezvous.cpp | 60 +- .../Plugins/Platform/Linux/PlatformLinux.cpp | 59 + lldb/source/Plugins/Platform/Linux/PlatformLinux.h | 13 +- lldb/source/Plugins/Process/Linux/CMakeLists.txt | 3 +- .../Plugins/Process/Linux/NativeProcessLinux.cpp | 3465 +++++++++++++++ .../Plugins/Process/Linux/NativeProcessLinux.h | 379 ++ .../Plugins/Process/Linux/NativeThreadLinux.cpp | 363 ++ .../Plugins/Process/Linux/NativeThreadLinux.h | 97 + lldb/source/Plugins/Process/Linux/ProcessLinux.h | 5 +- .../Plugins/Process/Linux/ProcessMonitor.cpp | 6 +- lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp | 13 + lldb/source/Plugins/Process/POSIX/ProcessPOSIX.h | 3 + lldb/source/Plugins/Process/Utility/CMakeLists.txt | 2 + .../Process/{Linux => Utility}/LinuxSignals.cpp | 10 + .../Process/{Linux => Utility}/LinuxSignals.h | 22 +- .../Utility/NativeRegisterContextLinux_x86_64.cpp | 1040 +++++ .../Utility/NativeRegisterContextLinux_x86_64.h | 135 + .../Utility/RegisterContextFreeBSD_i386.cpp | 14 +- .../Process/Utility/RegisterContextFreeBSD_i386.h | 8 +- .../Utility/RegisterContextFreeBSD_mips64.cpp | 15 +- .../Utility/RegisterContextFreeBSD_mips64.h | 8 +- .../Utility/RegisterContextFreeBSD_x86_64.cpp | 67 +- .../Utility/RegisterContextFreeBSD_x86_64.h | 12 +- .../Process/Utility/RegisterContextLinux_i386.cpp | 15 +- .../Process/Utility/RegisterContextLinux_i386.h | 8 +- .../Utility/RegisterContextLinux_x86_64.cpp | 66 +- .../Process/Utility/RegisterContextLinux_x86_64.h | 12 +- .../Process/Utility/RegisterInfoInterface.h | 14 +- .../Process/Utility/lldb-x86-register-enums.h | 292 ++ .../Plugins/Process/elf-core/ProcessElfCore.h | 2 +- .../gdb-remote/GDBRemoteCommunicationClient.cpp | 5 + .../gdb-remote/GDBRemoteCommunicationServer.cpp | 4575 +++++++++++++++----- .../gdb-remote/GDBRemoteCommunicationServer.h | 198 +- .../Process/gdb-remote/ProcessGDBRemote.cpp | 60 +- .../Plugins/Process/gdb-remote/ProcessGDBRemote.h | 11 +- lldb/source/Target/CMakeLists.txt | 2 + lldb/source/Target/NativeRegisterContext.cpp | 470 ++ .../Target/NativeRegisterContextRegisterInfo.cpp | 44 + lldb/source/Target/Platform.cpp | 25 +- lldb/source/Target/Process.cpp | 15 + lldb/source/Utility/StringExtractor.cpp | 13 + lldb/source/Utility/StringExtractor.h | 3 + lldb/source/Utility/StringExtractorGDBRemote.cpp | 5 + lldb/source/Utility/StringExtractorGDBRemote.h | 2 + .../lldb-gdbserver/TestGdbRemoteAuxvSupport.py | 4 - .../TestGdbRemoteExpeditedRegisters.py | 5 - .../lldb-gdbserver/TestGdbRemoteRegisterState.py | 2 - .../lldb-gdbserver/TestGdbRemoteSingleStep.py | 1 - .../TestGdbRemoteThreadsInStopReply.py | 6 +- .../tools/lldb-gdbserver/TestGdbRemote_vCont.py | 9 - .../test/tools/lldb-gdbserver/TestLldbGdbServer.py | 37 - .../tools/lldb-gdbserver/gdbremote_testcase.py | 1 + lldb/test/tools/lldb-gdbserver/main.cpp | 9 +- lldb/tools/debugserver/source/RNBRemote.cpp | 1 + lldb/tools/lldb-gdbserver/lldb-gdbserver.cpp | 385 +- lldb/tools/lldb-platform/lldb-platform.cpp | 2 +- 85 files changed, 12994 insertions(+), 1537 deletions(-) create mode 100644 lldb/include/lldb/Target/NativeRegisterContext.h create mode 100644 lldb/include/lldb/Target/NativeRegisterContextRegisterInfo.h create mode 100644 lldb/include/lldb/lldb-private-forward.h create mode 100644 lldb/source/Host/common/NativeBreakpoint.cpp create mode 100644 lldb/source/Host/common/NativeBreakpoint.h create mode 100644 lldb/source/Host/common/NativeBreakpointList.cpp create mode 100644 lldb/source/Host/common/NativeBreakpointList.h create mode 100644 lldb/source/Host/common/NativeProcessProtocol.cpp create mode 100644 lldb/source/Host/common/NativeProcessProtocol.h create mode 100644 lldb/source/Host/common/NativeThreadProtocol.cpp create mode 100644 lldb/source/Host/common/NativeThreadProtocol.h create mode 100644 lldb/source/Host/common/SoftwareBreakpoint.cpp create mode 100644 lldb/source/Host/common/SoftwareBreakpoint.h create mode 100644 lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp create mode 100644 lldb/source/Plugins/Process/Linux/NativeProcessLinux.h create mode 100644 lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp create mode 100644 lldb/source/Plugins/Process/Linux/NativeThreadLinux.h rename lldb/source/Plugins/Process/{Linux => Utility}/LinuxSignals.cpp (89%) rename lldb/source/Plugins/Process/{Linux => Utility}/LinuxSignals.h (70%) create mode 100644 lldb/source/Plugins/Process/Utility/NativeRegisterContextLinux_x86_64.cpp create mode 100644 lldb/source/Plugins/Process/Utility/NativeRegisterContextLinux_x86_64.h create mode 100644 lldb/source/Plugins/Process/Utility/lldb-x86-register-enums.h create mode 100644 lldb/source/Target/NativeRegisterContext.cpp create mode 100644 lldb/source/Target/NativeRegisterContextRegisterInfo.cpp diff --git a/lldb/.gitignore b/lldb/.gitignore index e9ec9ce..f5c9b08 100644 --- a/lldb/.gitignore +++ b/lldb/.gitignore @@ -25,3 +25,6 @@ build/ llvm-build/ *xcuserdata test/20* + +# We should ignore Xcode-style embedding of llvm/ at lldb root dir. +/llvm/ diff --git a/lldb/docs/lldb-gdb-remote.txt b/lldb/docs/lldb-gdb-remote.txt index e88fd12..4bbc06a 100644 --- a/lldb/docs/lldb-gdb-remote.txt +++ b/lldb/docs/lldb-gdb-remote.txt @@ -207,7 +207,7 @@ With LLDB, for register information, remote GDB servers can add support for the "qRegisterInfoN" packet where "N" is a zero based base16 register number that must start at zero and increase by one for each register that is supported. The response is done in typical -GDB remote fashion where a serious of "KEY:VALUE;" pairs are returned. +GDB remote fashion where a series of "KEY:VALUE;" pairs are returned. An example for the x86_64 registers is included below: send packet: $qRegisterInfo0#00 diff --git a/lldb/include/lldb/Core/UserID.h b/lldb/include/lldb/Core/UserID.h index ea6af74..230e43f 100644 --- a/lldb/include/lldb/Core/UserID.h +++ b/lldb/include/lldb/Core/UserID.h @@ -19,12 +19,12 @@ namespace lldb_private { /// @class UserID UserID.h "lldb/Core/UserID.h" /// @brief A mix in class that contains a generic user ID. /// -/// UserID is desinged as a mix in class that can contain an integer -/// based unique identifier for a varietly of objects in lldb. +/// UserID is designed as a mix in class that can contain an integer +/// based unique identifier for a variety of objects in lldb. /// /// The value for this identifier is chosen by each parser plug-in. A /// value should be chosen that makes sense for each kind of object -/// should and allows quick access to further and more in depth parsing. +/// and should allow quick access to further and more in depth parsing. /// /// Symbol table entries can use this to store the original symbol table /// index, functions can use it to store the symbol table index or the diff --git a/lldb/include/lldb/Host/Debug.h b/lldb/include/lldb/Host/Debug.h index 2cb758e..87dffb9 100644 --- a/lldb/include/lldb/Host/Debug.h +++ b/lldb/include/lldb/Host/Debug.h @@ -10,14 +10,11 @@ #ifndef liblldb_Debug_h_ #define liblldb_Debug_h_ -#include "lldb/lldb-private.h" -#include "lldb/Core/Error.h" -#include "lldb/Core/StreamString.h" -#include "lldb/Host/Mutex.h" #include +#include "lldb/lldb-private.h" namespace lldb_private { - + //------------------------------------------------------------------ // Tells a thread what it needs to do when the process is resumed. //------------------------------------------------------------------ @@ -27,7 +24,7 @@ namespace lldb_private { lldb::StateType state; // Valid values are eStateStopped/eStateSuspended, eStateRunning, and eStateStepping. int signal; // When resuming this thread, resume it with this signal if this value is > 0 }; - + //------------------------------------------------------------------ // A class that contains instructions for all threads for // NativeProcessProtocol::Resume(). Each thread can either run, stay @@ -43,15 +40,14 @@ namespace lldb_private { m_signal_handled () { } - + ResumeActionList (lldb::StateType default_action, int signal) : m_actions(), m_signal_handled () { SetDefaultThreadActionIfNeeded (default_action, signal); } - - + ResumeActionList (const ResumeAction *actions, size_t num_actions) : m_actions (), m_signal_handled () @@ -62,7 +58,7 @@ namespace lldb_private { m_signal_handled.assign (num_actions, false); } } - + ~ResumeActionList() { } @@ -72,14 +68,14 @@ namespace lldb_private { { return m_actions.empty(); } - + void Append (const ResumeAction &action) { m_actions.push_back (action); m_signal_handled.push_back (false); } - + void AppendAction (lldb::tid_t tid, lldb::StateType state, @@ -88,25 +84,25 @@ namespace lldb_private { ResumeAction action = { tid, state, signal }; Append (action); } - + void AppendResumeAll () { AppendAction (LLDB_INVALID_THREAD_ID, lldb::eStateRunning); } - + void AppendSuspendAll () { AppendAction (LLDB_INVALID_THREAD_ID, lldb::eStateStopped); } - + void AppendStepAll () { AppendAction (LLDB_INVALID_THREAD_ID, lldb::eStateStepping); } - + const ResumeAction * GetActionForThread (lldb::tid_t tid, bool default_ok) const { @@ -120,7 +116,7 @@ namespace lldb_private { return GetActionForThread (LLDB_INVALID_THREAD_ID, false); return NULL; } - + size_t NumActionsWithState (lldb::StateType state) const { @@ -133,7 +129,7 @@ namespace lldb_private { } return count; } - + bool SetDefaultThreadActionIfNeeded (lldb::StateType action, int signal) { @@ -147,7 +143,7 @@ namespace lldb_private { } return false; } - + void SetSignalHandledForThread (lldb::tid_t tid) const { @@ -161,26 +157,26 @@ namespace lldb_private { } } } - + const ResumeAction * GetFirst() const { return m_actions.data(); } - + size_t GetSize () const { return m_actions.size(); } - + void Clear() { m_actions.clear(); m_signal_handled.clear(); } - + protected: std::vector m_actions; mutable std::vector m_signal_handled; @@ -191,13 +187,13 @@ namespace lldb_private { lldb::StopReason reason; union { - // eStopTypeSignal + // eStopReasonSignal struct { uint32_t signo; } signal; - - // eStopTypeException + + // eStopReasonException struct { uint64_t type; @@ -206,201 +202,5 @@ namespace lldb_private { } exception; } details; }; - - //------------------------------------------------------------------ - // NativeThreadProtocol - //------------------------------------------------------------------ - class NativeThreadProtocol { - - public: - NativeThreadProtocol (NativeProcessProtocol *process, lldb::tid_t tid) : - m_process (process), - m_tid (tid) - { - } - - virtual ~NativeThreadProtocol() - { - } - virtual const char *GetName() = 0; - virtual lldb::StateType GetState () = 0; - virtual Error ReadRegister (uint32_t reg, RegisterValue ®_value) = 0; - virtual Error WriteRegister (uint32_t reg, const RegisterValue ®_value) = 0; - virtual Error SaveAllRegisters (lldb::DataBufferSP &data_sp) = 0; - virtual Error RestoreAllRegisters (lldb::DataBufferSP &data_sp) = 0; - virtual bool GetStopReason (ThreadStopInfo &stop_info) = 0; - - lldb::tid_t - GetID() const - { - return m_tid; - } - protected: - NativeProcessProtocol *m_process; - lldb::tid_t m_tid; - }; - - - //------------------------------------------------------------------ - // NativeProcessProtocol - //------------------------------------------------------------------ - class NativeProcessProtocol { - public: - - static NativeProcessProtocol * - CreateInstance (lldb::pid_t pid); - - // lldb_private::Host calls should be used to launch a process for debugging, and - // then the process should be attached to. When attaching to a process - // lldb_private::Host calls should be used to locate the process to attach to, - // and then this function should be called. - NativeProcessProtocol (lldb::pid_t pid) : - m_pid (pid), - m_threads(), - m_threads_mutex (Mutex::eMutexTypeRecursive), - m_state (lldb::eStateInvalid), - m_exit_status(0), - m_exit_description() - { - } - - public: - virtual ~NativeProcessProtocol () - { - } - - virtual Error Resume (const ResumeActionList &resume_actions) = 0; - virtual Error Halt () = 0; - virtual Error Detach () = 0; - virtual Error Signal (int signo) = 0; - virtual Error Kill () = 0; - - virtual Error ReadMemory (lldb::addr_t addr, void *buf, lldb::addr_t size, lldb::addr_t &bytes_read) = 0; - virtual Error WriteMemory (lldb::addr_t addr, const void *buf, lldb::addr_t size, lldb::addr_t &bytes_written) = 0; - virtual Error AllocateMemory (lldb::addr_t size, uint32_t permissions, lldb::addr_t &addr) = 0; - virtual Error DeallocateMemory (lldb::addr_t addr) = 0; - - virtual lldb::addr_t GetSharedLibraryInfoAddress () = 0; - - virtual bool IsAlive () = 0; - virtual size_t UpdateThreads () = 0; - virtual bool GetArchitecture (ArchSpec &arch) = 0; - - //---------------------------------------------------------------------- - // Breakpoint functions - //---------------------------------------------------------------------- - virtual Error SetBreakpoint (lldb::addr_t addr, size_t size, bool hardware) = 0; - virtual Error RemoveBreakpoint (lldb::addr_t addr, size_t size) = 0; - - //---------------------------------------------------------------------- - // Watchpoint functions - //---------------------------------------------------------------------- - virtual uint32_t GetMaxWatchpoints () = 0; - virtual Error SetWatchpoint (lldb::addr_t addr, size_t size, uint32_t watch_flags, bool hardware) = 0; - virtual Error RemoveWatchpoint (lldb::addr_t addr) = 0; - - - //---------------------------------------------------------------------- - // Accessors - //---------------------------------------------------------------------- - lldb::pid_t - GetID() const - { - return m_pid; - } - - lldb::StateType - GetState () const - { - return m_state; - } - - bool - IsRunning () const - { - return m_state == lldb::eStateRunning || IsStepping(); - } - - bool - IsStepping () const - { - return m_state == lldb::eStateStepping; - } - - bool - CanResume () const - { - return m_state == lldb::eStateStopped; - } - - - void - SetState (lldb::StateType state) - { - m_state = state; - } - - //---------------------------------------------------------------------- - // Exit Status - //---------------------------------------------------------------------- - virtual bool - GetExitStatus (int *status) - { - if (m_state == lldb::eStateExited) - { - *status = m_exit_status; - return true; - } - *status = 0; - return false; - } - virtual bool - SetExitStatus (int status, const char *exit_description) - { - // Exit status already set - if (m_state == lldb::eStateExited) - return false; - m_state = lldb::eStateExited; - m_exit_status = status; - if (exit_description && exit_description[0]) - m_exit_description = exit_description; - else - m_exit_description.clear(); - return true; - } - - //---------------------------------------------------------------------- - // Access to threads - //---------------------------------------------------------------------- - lldb::NativeThreadProtocolSP - GetThreadAtIndex (uint32_t idx) - { - Mutex::Locker locker(m_threads_mutex); - if (idx < m_threads.size()) - return m_threads[idx]; - return lldb::NativeThreadProtocolSP(); - } - - lldb::NativeThreadProtocolSP - GetThreadByID (lldb::tid_t tid) - { - Mutex::Locker locker(m_threads_mutex); - for (auto thread_sp : m_threads) - { - if (thread_sp->GetID() == tid) - return thread_sp; - } - return lldb::NativeThreadProtocolSP(); - } - - protected: - lldb::pid_t m_pid; - std::vector m_threads; - mutable Mutex m_threads_mutex; - lldb::StateType m_state; - int m_exit_status; - std::string m_exit_description; - }; - } #endif // #ifndef liblldb_Debug_h_ diff --git a/lldb/include/lldb/Host/Host.h b/lldb/include/lldb/Host/Host.h index 1813372..1f6101b 100644 --- a/lldb/include/lldb/Host/Host.h +++ b/lldb/include/lldb/Host/Host.h @@ -503,6 +503,9 @@ public: static lldb::DataBufferSP GetAuxvData (lldb_private::Process *process); + static lldb::DataBufferSP + GetAuxvData (lldb::pid_t pid); + static lldb::TargetSP GetDummyTarget (Debugger &debugger); diff --git a/lldb/include/lldb/Target/MemoryRegionInfo.h b/lldb/include/lldb/Target/MemoryRegionInfo.h index dac968d..0726ad1 100644 --- a/lldb/include/lldb/Target/MemoryRegionInfo.h +++ b/lldb/include/lldb/Target/MemoryRegionInfo.h @@ -10,6 +10,7 @@ #ifndef lldb_MemoryRegionInfo_h #define lldb_MemoryRegionInfo_h +#include "lldb/Core/RangeMap.h" #include "lldb/Utility/Range.h" namespace lldb_private diff --git a/lldb/include/lldb/Target/NativeRegisterContext.h b/lldb/include/lldb/Target/NativeRegisterContext.h new file mode 100644 index 0000000..fa4ab01 --- /dev/null +++ b/lldb/include/lldb/Target/NativeRegisterContext.h @@ -0,0 +1,190 @@ +//===-- NativeRegisterContext.h ---------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_NativeRegisterContext_h_ +#define liblldb_NativeRegisterContext_h_ + +// C Includes +// C++ Includes +// Other libraries and framework includes +// Project includes +#include "lldb/lldb-private.h" + +namespace lldb_private { + +class NativeThreadProtocol; + +class NativeRegisterContext: + public std::enable_shared_from_this +{ +public: + //------------------------------------------------------------------ + // Constructors and Destructors + //------------------------------------------------------------------ + NativeRegisterContext (NativeThreadProtocol &thread, uint32_t concrete_frame_idx); + + virtual + ~NativeRegisterContext (); + + // void + // InvalidateIfNeeded (bool force); + + //------------------------------------------------------------------ + // Subclasses must override these functions + //------------------------------------------------------------------ + // virtual void + // InvalidateAllRegisters () = 0; + + virtual uint32_t + GetRegisterCount () const = 0; + + virtual const RegisterInfo * + GetRegisterInfoAtIndex (uint32_t reg) const = 0; + + const char * + GetRegisterSetNameForRegisterAtIndex (uint32_t reg_index) const; + + virtual uint32_t + GetRegisterSetCount () const = 0; + + virtual const RegisterSet * + GetRegisterSet (uint32_t set_index) const = 0; + + virtual Error + ReadRegister (const RegisterInfo *reg_info, RegisterValue ®_value) = 0; + + virtual Error + WriteRegister (const RegisterInfo *reg_info, const RegisterValue ®_value) = 0; + + virtual Error + ReadAllRegisterValues (lldb::DataBufferSP &data_sp) = 0; + + virtual Error + WriteAllRegisterValues (const lldb::DataBufferSP &data_sp) = 0; + + uint32_t + ConvertRegisterKindToRegisterNumber (uint32_t kind, uint32_t num) const; + + //------------------------------------------------------------------ + // Subclasses can override these functions if desired + //------------------------------------------------------------------ + virtual uint32_t + NumSupportedHardwareBreakpoints (); + + virtual uint32_t + SetHardwareBreakpoint (lldb::addr_t addr, size_t size); + + virtual bool + ClearHardwareBreakpoint (uint32_t hw_idx); + + virtual uint32_t + NumSupportedHardwareWatchpoints (); + + virtual uint32_t + SetHardwareWatchpoint (lldb::addr_t addr, size_t size, uint32_t watch_flags); + + virtual bool + ClearHardwareWatchpoint (uint32_t hw_index); + + virtual bool + HardwareSingleStep (bool enable); + + virtual Error + ReadRegisterValueFromMemory (const lldb_private::RegisterInfo *reg_info, lldb::addr_t src_addr, lldb::addr_t src_len, RegisterValue ®_value); + + virtual Error + WriteRegisterValueToMemory (const lldb_private::RegisterInfo *reg_info, lldb::addr_t dst_addr, lldb::addr_t dst_len, const RegisterValue ®_value); + + //------------------------------------------------------------------ + // Subclasses should not override these + //------------------------------------------------------------------ + virtual lldb::tid_t + GetThreadID() const; + + virtual NativeThreadProtocol & + GetThread () + { + return m_thread; + } + + const RegisterInfo * + GetRegisterInfoByName (const char *reg_name, uint32_t start_idx = 0); + + const RegisterInfo * + GetRegisterInfo (uint32_t reg_kind, uint32_t reg_num); + + lldb::addr_t + GetPC (lldb::addr_t fail_value = LLDB_INVALID_ADDRESS); + + Error + SetPC (lldb::addr_t pc); + + lldb::addr_t + GetSP (lldb::addr_t fail_value = LLDB_INVALID_ADDRESS); + + Error + SetSP (lldb::addr_t sp); + + lldb::addr_t + GetFP (lldb::addr_t fail_value = LLDB_INVALID_ADDRESS); + + Error + SetFP (lldb::addr_t fp); + + const char * + GetRegisterName (uint32_t reg); + + lldb::addr_t + GetReturnAddress (lldb::addr_t fail_value = LLDB_INVALID_ADDRESS); + + lldb::addr_t + GetFlags (lldb::addr_t fail_value = 0); + + lldb::addr_t + ReadRegisterAsUnsigned (uint32_t reg, lldb::addr_t fail_value); + + lldb::addr_t + ReadRegisterAsUnsigned (const RegisterInfo *reg_info, lldb::addr_t fail_value); + + Error + WriteRegisterFromUnsigned (uint32_t reg, uint64_t uval); + + Error + WriteRegisterFromUnsigned (const RegisterInfo *reg_info, uint64_t uval); + + // uint32_t + // GetStopID () const + // { + // return m_stop_id; + // } + + // void + // SetStopID (uint32_t stop_id) + // { + // m_stop_id = stop_id; + // } + +protected: + //------------------------------------------------------------------ + // Classes that inherit from RegisterContext can see and modify these + //------------------------------------------------------------------ + NativeThreadProtocol &m_thread; // The thread that this register context belongs to. + uint32_t m_concrete_frame_idx; // The concrete frame index for this register context + // uint32_t m_stop_id; // The stop ID that any data in this context is valid for + +private: + //------------------------------------------------------------------ + // For RegisterContext only + //------------------------------------------------------------------ + DISALLOW_COPY_AND_ASSIGN (NativeRegisterContext); +}; + +} // namespace lldb_private + +#endif // liblldb_NativeRegisterContext_h_ diff --git a/lldb/include/lldb/Target/NativeRegisterContextRegisterInfo.h b/lldb/include/lldb/Target/NativeRegisterContextRegisterInfo.h new file mode 100644 index 0000000..5631005 --- /dev/null +++ b/lldb/include/lldb/Target/NativeRegisterContextRegisterInfo.h @@ -0,0 +1,44 @@ +//===-- NativeRegisterContextRegisterInfo.h ----------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef lldb_NativeRegisterContextRegisterInfo_h +#define lldb_NativeRegisterContextRegisterInfo_h + +#include + +#include "NativeRegisterContext.h" +#include "Plugins/Process/Utility/RegisterInfoInterface.h" + +namespace lldb_private +{ + class NativeRegisterContextRegisterInfo: public NativeRegisterContext + { + public: + /// + /// Construct a NativeRegisterContextRegisterInfo, taking ownership + /// of the register_info_interface pointer. + /// + NativeRegisterContextRegisterInfo (NativeThreadProtocol &thread, + uint32_t concrete_frame_idx, + RegisterInfoInterface *register_info_interface); + + uint32_t + GetRegisterCount () const override; + + const RegisterInfo * + GetRegisterInfoAtIndex (uint32_t reg_index) const override; + + const RegisterInfoInterface& + GetRegisterInfoInterface () const; + + private: + std::unique_ptr m_register_info_interface_up; + }; +} +#endif diff --git a/lldb/include/lldb/Target/Platform.h b/lldb/include/lldb/Target/Platform.h index e1e1c91..f21c94a 100644 --- a/lldb/include/lldb/Target/Platform.h +++ b/lldb/include/lldb/Target/Platform.h @@ -18,6 +18,7 @@ // Other libraries and framework includes // Project includes +#include "lldb/lldb-private-forward.h" #include "lldb/lldb-public.h" #include "lldb/Core/ArchSpec.h" #include "lldb/Core/ConstString.h" @@ -25,6 +26,10 @@ #include "lldb/Interpreter/Options.h" #include "lldb/Host/Mutex.h" +// TODO pull NativeDelegate class out of NativeProcessProtocol so we +// can just forward ref the NativeDelegate rather than include it here. +#include "../../../source/Host/common/NativeProcessProtocol.h" + namespace lldb_private { //---------------------------------------------------------------------- @@ -858,6 +863,65 @@ namespace lldb_private { virtual const std::vector & GetTrapHandlerSymbolNames (); + //------------------------------------------------------------------ + /// Launch a process for debugging. + /// + /// This differs from Launch in that it returns a NativeProcessProtocol. + /// Currently used by lldb-gdbserver. + /// + /// @param[in] launch_info + /// Information required to launch the process. + /// + /// @param[in] native_delegate + /// The delegate that will receive messages regarding the + /// inferior. Must outlive the NativeProcessProtocol + /// instance. + /// + /// @param[out] process_sp + /// On successful return from the method, this parameter + /// contains the shared pointer to the + /// NativeProcessProtocol that can be used to manipulate + /// the native process. + /// + /// @return + /// An error object indicating if the operation succeeded, + /// and if not, what error occurred. + //------------------------------------------------------------------ + virtual Error + LaunchNativeProcess ( + ProcessLaunchInfo &launch_info, + lldb_private::NativeProcessProtocol::NativeDelegate &native_delegate, + NativeProcessProtocolSP &process_sp); + + //------------------------------------------------------------------ + /// Attach to an existing process on the given platform. + /// + /// This method differs from Attach() in that it returns a + /// NativeProcessProtocol. Currently this is used by lldb-gdbserver. + /// + /// @param[in] pid + /// pid of the process locatable by the platform. + /// + /// @param[in] native_delegate + /// The delegate that will receive messages regarding the + /// inferior. Must outlive the NativeProcessProtocol + /// instance. + /// + /// @param[out] process_sp + /// On successful return from the method, this parameter + /// contains the shared pointer to the + /// NativeProcessProtocol that can be used to manipulate + /// the native process. + /// + /// @return + /// An error object indicating if the operation succeeded, + /// and if not, what error occurred. + //------------------------------------------------------------------ + virtual Error + AttachNativeProcess (lldb::pid_t pid, + lldb_private::NativeProcessProtocol::NativeDelegate &native_delegate, + NativeProcessProtocolSP &process_sp); + protected: bool m_is_host; // Set to true when we are able to actually set the OS version while diff --git a/lldb/include/lldb/Target/Process.h b/lldb/include/lldb/Target/Process.h index ea9580a..9af6dc3 100644 --- a/lldb/include/lldb/Target/Process.h +++ b/lldb/include/lldb/Target/Process.h @@ -1097,6 +1097,17 @@ public: virtual DynamicLoader * GetDynamicLoader (); + //------------------------------------------------------------------ + // Returns AUXV structure found in many ELF-based environments. + // + // The default action is to return an empty data buffer. + // + // @return + // A data buffer containing the contents of the AUXV data. + //------------------------------------------------------------------ + virtual const lldb::DataBufferSP + GetAuxvData(); + protected: virtual JITLoaderList & GetJITLoaders (); diff --git a/lldb/include/lldb/lldb-enumerations.h b/lldb/include/lldb/lldb-enumerations.h index 33e34df..12c3952 100644 --- a/lldb/include/lldb/lldb-enumerations.h +++ b/lldb/include/lldb/lldb-enumerations.h @@ -788,6 +788,27 @@ namespace lldb { } ExpressionEvaluationPhase; + //---------------------------------------------------------------------- + // Watchpoint Kind + // Indicates what types of events cause the watchpoint to fire. + // Used by Native*Protocol-related classes. + //---------------------------------------------------------------------- + typedef enum WatchpointKind + { + eWatchpointKindRead = (1u << 0), + eWatchpointKindWrite = (1u << 1) + } WatchpointKind; + + typedef enum GdbSignal + { + eGdbSignalBadAccess = 0x91, + eGdbSignalBadInstruction = 0x92, + eGdbSignalArithmetic = 0x93, + eGdbSignalEmulation = 0x94, + eGdbSignalSoftware = 0x95, + eGdbSignalBreakpoint = 0x96 + } GdbRemoteSignal; + } // namespace lldb diff --git a/lldb/include/lldb/lldb-private-enumerations.h b/lldb/include/lldb/lldb-private-enumerations.h index 5f0d73c..f612187 100644 --- a/lldb/include/lldb/lldb-private-enumerations.h +++ b/lldb/include/lldb/lldb-private-enumerations.h @@ -246,6 +246,16 @@ enum class LineStatus { Done // Lines are complete }; +//---------------------------------------------------------------------- +// Exit Type for inferior processes +//---------------------------------------------------------------------- +typedef enum ExitType { + eExitTypeInvalid, + eExitTypeExit, // The exit status represents the return code from normal program exit (i.e. WIFEXITED() was true) + eExitTypeSignal, // The exit status represents the signal number that caused the program to exit (i.e. WIFSIGNALED() was true) + eExitTypeStop, // The exit status represents the stop signal that caused the program to exit (i.e. WIFSTOPPED() was true) +} ExitType; + } // namespace lldb_private diff --git a/lldb/include/lldb/lldb-private-forward.h b/lldb/include/lldb/lldb-private-forward.h new file mode 100644 index 0000000..08067d8 --- /dev/null +++ b/lldb/include/lldb/lldb-private-forward.h @@ -0,0 +1,39 @@ +//===-- lldb-private-forward.h ----------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef LLDB_lldb_private_forward_h_ +#define LLDB_lldb_private_forward_h_ + +#if defined(__cplusplus) + +#include + +namespace lldb_private +{ + // --------------------------------------------------------------- + // Class forward decls. + // --------------------------------------------------------------- + class NativeBreakpoint; + class NativeBreakpointList; + class NativeProcessProtocol; + class NativeRegisterContext; + class NativeThreadProtocol; + + // --------------------------------------------------------------- + // SP/WP decls. + // --------------------------------------------------------------- + typedef std::shared_ptr NativeBreakpointSP; + typedef std::shared_ptr NativeProcessProtocolSP; + typedef std::weak_ptr NativeProcessProtocolWP; + typedef std::shared_ptr NativeRegisterContextSP; + typedef std::shared_ptr NativeThreadProtocolSP; +} + +#endif // #if 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23EDE3371926AAD500F6A132 /* RegisterInfoInterface.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; name = RegisterInfoInterface.h; path = Utility/RegisterInfoInterface.h; sourceTree = ""; }; 23EFE388193D1ABC00E54E54 /* SBTypeEnumMember.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; name = SBTypeEnumMember.h; path = include/lldb/API/SBTypeEnumMember.h; sourceTree = ""; }; 23EFE38A193D1AEC00E54E54 /* SBTypeEnumMember.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; name = SBTypeEnumMember.cpp; path = source/API/SBTypeEnumMember.cpp; sourceTree = ""; }; + 23F403471926C8D50046DC9B /* NativeRegisterContextRegisterInfo.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = NativeRegisterContextRegisterInfo.h; path = include/lldb/Target/NativeRegisterContextRegisterInfo.h; sourceTree = ""; }; + 23F403481926CC250046DC9B /* NativeRegisterContextRegisterInfo.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = NativeRegisterContextRegisterInfo.cpp; path = source/Target/NativeRegisterContextRegisterInfo.cpp; sourceTree = ""; }; 260157C41885F4FF00F875CF /* libpanel.dylib */ = {isa = PBXFileReference; lastKnownFileType = "compiled.mach-o.dylib"; name = libpanel.dylib; path = /usr/lib/libpanel.dylib; sourceTree = ""; }; 260223E7115F06D500A601A2 /* SBCommunication.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = SBCommunication.h; path = include/lldb/API/SBCommunication.h; sourceTree = ""; }; 260223E8115F06E500A601A2 /* SBCommunication.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = SBCommunication.cpp; path = source/API/SBCommunication.cpp; sourceTree = ""; }; @@ -2186,10 +2218,12 @@ 233B008B196106E90090E598 /* Linux */ = { isa = PBXGroup; children = ( - 233B008C19610B1F0090E598 /* LinuxSignals.cpp */, - 233B008D19610B1F0090E598 /* LinuxSignals.h */, 233B008E19610B1F0090E598 /* LinuxThread.cpp */, 233B008F19610B1F0090E598 /* LinuxThread.h */, + 232CB62B19213AC200EF39FC /* NativeProcessLinux.cpp */, + 232CB62C19213AC200EF39FC /* NativeProcessLinux.h */, + 232CB62D19213AC200EF39FC /* NativeThreadLinux.cpp */, + 232CB62E19213AC200EF39FC /* NativeThreadLinux.h */, 233B009019610B1F0090E598 /* ProcessLinux.cpp */, 233B009119610B1F0090E598 /* ProcessLinux.h */, 233B009219610B1F0090E598 /* ProcessMonitor.cpp */, @@ -2882,6 +2916,8 @@ B28058A0139988B0002D96D0 /* InferiorCallPOSIX.cpp */, B28058A2139988C6002D96D0 /* InferiorCallPOSIX.h */, B2D3033612EFA5C500F84EB3 /* InstructionUtils.h */, + 23059A0519532B96007B8189 /* LinuxSignals.cpp */, + 23059A0619532B96007B8189 /* LinuxSignals.h */, 26474C9E18D0CAEC0073DEBA /* RegisterContext_mips64.h */, 26474C9F18D0CAEC0073DEBA /* RegisterContext_x86.h */, 26957D9213D381C900670048 /* RegisterContextDarwin_arm.cpp */, @@ -2939,6 +2975,9 @@ 26E3EEE411A9901300FBADB6 /* UnwindMacOSXFrameBackchain.h */, 26E3EEE311A9901300FBADB6 /* UnwindMacOSXFrameBackchain.cpp */, 23EDE3371926AAD500F6A132 /* RegisterInfoInterface.h */, + 239F5B2E19296DC500083917 /* NativeRegisterContextLinux_x86_64.h */, + 239F5B3019298D4600083917 /* NativeRegisterContextLinux_x86_64.cpp */, + 23173F8B192BA93F005C708F /* lldb-x86-register-enums.h */, ); name = Utility; sourceTree = ""; @@ -3376,10 +3415,20 @@ 26FA4315130103F400E71120 /* FileSpec.h */, 26BC7DD410F1B7D500F91463 /* Host.h */, 26BC7DD510F1B7D500F91463 /* Mutex.h */, + 232CB60B191E00CC00EF39FC /* NativeBreakpoint.cpp */, + 232CB60C191E00CC00EF39FC /* NativeBreakpoint.h */, + 232CB60D191E00CC00EF39FC /* NativeBreakpointList.cpp */, + 232CB60E191E00CC00EF39FC /* NativeBreakpointList.h */, + 232CB60F191E00CC00EF39FC /* NativeProcessProtocol.cpp */, + 232CB610191E00CC00EF39FC /* NativeProcessProtocol.h */, + 232CB611191E00CC00EF39FC /* NativeThreadProtocol.cpp */, + 232CB612191E00CC00EF39FC /* NativeThreadProtocol.h */, A36FF33D17D8E98800244D40 /* OptionParser.h */, 26BC7DD610F1B7D500F91463 /* Predicate.h */, 26D7E45B13D5E2F9007FD12B /* SocketAddress.h */, 26D7E45C13D5E30A007FD12B /* SocketAddress.cpp */, + 232CB613191E00CC00EF39FC /* SoftwareBreakpoint.cpp */, + 232CB614191E00CD00EF39FC /* SoftwareBreakpoint.h */, 2689B0A4113EE3CD00A4AEDB /* Symbols.h */, 268DA871130095D000C9483A /* Terminal.h */, 26B4E26E112F35F700AB3F64 /* TimeValue.h */, @@ -3486,6 +3535,8 @@ 26BC7DEF10F1B80200F91463 /* Target */ = { isa = PBXGroup; children = ( + 23EDE3311926843600F6A132 /* NativeRegisterContext.h */, + 23EDE3301926839700F6A132 /* NativeRegisterContext.cpp */, 497E7B331188ED300065CCA1 /* ABI.h */, 497E7B9D1188F6690065CCA1 /* ABI.cpp */, 4CB443BB1249920C00C13DC2 /* CPPLanguageRuntime.h */, @@ -3583,6 +3634,8 @@ 26E3EEBD11A9870400FBADB6 /* Unwind.h */, 264D8D4E13661BCC003A368F /* UnwindAssembly.h */, 264D8D4F13661BD7003A368F /* UnwindAssembly.cpp */, + 23F403471926C8D50046DC9B /* NativeRegisterContextRegisterInfo.h */, + 23F403481926CC250046DC9B /* NativeRegisterContextRegisterInfo.cpp */, ); name = Target; sourceTree = ""; @@ -4103,6 +4156,7 @@ 26FFC19C14FC072100087D58 /* DYLDRendezvous.h in Headers */, AF1F7B08189C904B0087DB9C /* AppleGetPendingItemsHandler.h in Headers */, AF2BCA6D18C7EFDE005B4526 /* JITLoaderGDB.h in Headers */, + 232CB61E191E00CD00EF39FC /* SoftwareBreakpoint.h in Headers */, 26BC17B218C7F4CB00D2196D /* ThreadElfCore.h in Headers */, 26FFC19E14FC072100087D58 /* DynamicLoaderPOSIXDYLD.h in Headers */, AF254E32170CCC33007AE5C9 /* PlatformDarwinKernel.h in Headers */, @@ -4120,6 +4174,7 @@ 260CC63115D04377002BF2E0 /* OptionValueProperties.h in Headers */, 260CC63215D04377002BF2E0 /* OptionValueDictionary.h in Headers */, 262173A118395D3800C52091 /* SectionLoadHistory.h in Headers */, + 232CB61A191E00CD00EF39FC /* NativeProcessProtocol.h in Headers */, 260CC63315D04377002BF2E0 /* OptionValueEnumeration.h in Headers */, AF45FDE618A1F3AC0007051C /* AppleGetThreadItemInfoHandler.h in Headers */, 260A63171861008E00FECF8E /* IOHandler.h in Headers */, @@ -4147,15 +4202,18 @@ 260CC63A15D04377002BF2E0 /* OptionValueUUID.h in Headers */, 260A248E15D06C50009981B0 /* OptionValues.h in Headers */, AF061F88182C97ED00B6A19C /* RegisterContextHistory.h in Headers */, + 239F5B2F19296DC500083917 /* NativeRegisterContextLinux_x86_64.h in Headers */, 26DAED6015D327A200E15819 /* OptionValuePathMappings.h in Headers */, 26ACEC2815E077AE00E94760 /* Property.h in Headers */, 26491E3B15E1DB8600CBFFC2 /* OptionValueRegex.h in Headers */, 2697A39515E404BA003E682C /* OptionValueArch.h in Headers */, - AF23B4DC19009C66003E2A58 /* FreeBSDSignals.h in Headers */, 26474CBF18D0CB2D0073DEBA /* RegisterContextMach_i386.h in Headers */, 26474CC118D0CB2D0073DEBA /* RegisterContextMach_x86_64.h in Headers */, 2698699D15E6CBD0002415FF /* OperatingSystemPython.h in Headers */, + 232CB618191E00CD00EF39FC /* NativeBreakpointList.h in Headers */, 260D9B2715EC369500960137 /* ModuleSpec.h in Headers */, + 232CB61C191E00CD00EF39FC /* NativeThreadProtocol.h in Headers */, + 232CB616191E00CD00EF39FC /* NativeBreakpoint.h in Headers */, 947A1D651616476B0017C8D1 /* CommandObjectPlugin.h in Headers */, 262ED0051631FA2800879631 /* OptionGroupString.h in Headers */, 26474CA918D0CB070073DEBA /* RegisterContextFreeBSD_i386.h in Headers */, @@ -4606,6 +4664,7 @@ 2689001813353DDE00698AC0 /* CommandObjectExpression.cpp in Sources */, 2689001A13353DDE00698AC0 /* CommandObjectFrame.cpp in Sources */, 2689001B13353DDE00698AC0 /* CommandObjectHelp.cpp in Sources */, + 23F4034D1926E0F60046DC9B /* NativeRegisterContextRegisterInfo.cpp in Sources */, 2689001D13353DDE00698AC0 /* CommandObjectLog.cpp in Sources */, 262173A318395D4600C52091 /* SectionLoadHistory.cpp in Sources */, 2689001E13353DDE00698AC0 /* CommandObjectMemory.cpp in Sources */, @@ -4652,6 +4711,7 @@ 2689004313353E0400698AC0 /* Mangled.cpp in Sources */, 2689004413353E0400698AC0 /* Module.cpp in Sources */, 2689004513353E0400698AC0 /* ModuleChild.cpp in Sources */, + 23EDE33319269E7C00F6A132 /* NativeRegisterContext.cpp in Sources */, 2689004613353E0400698AC0 /* ModuleList.cpp in Sources */, 2689004713353E0400698AC0 /* PluginManager.cpp in Sources */, AF0C112818580CD800C4C45B /* QueueItem.cpp in Sources */, @@ -4672,6 +4732,7 @@ 2689005313353E0400698AC0 /* UserID.cpp in Sources */, 2689005413353E0400698AC0 /* UserSettingsController.cpp in Sources */, 2689005513353E0400698AC0 /* UUID.cpp in Sources */, + 23059A0719532B96007B8189 /* LinuxSignals.cpp in Sources */, 2689005613353E0400698AC0 /* Value.cpp in Sources */, 2689005713353E0400698AC0 /* ValueObject.cpp in Sources */, 2689005813353E0400698AC0 /* ValueObjectChild.cpp in Sources */, @@ -4829,13 +4890,17 @@ 268900F913353E6F00698AC0 /* Thread.cpp in Sources */, 268900FA13353E6F00698AC0 /* ThreadList.cpp in Sources */, 268900FB13353E6F00698AC0 /* ThreadPlan.cpp in Sources */, + 232CB619191E00CD00EF39FC /* NativeProcessProtocol.cpp in Sources */, 268900FC13353E6F00698AC0 /* ThreadPlanBase.cpp in Sources */, 268900FD13353E6F00698AC0 /* ThreadPlanCallFunction.cpp in Sources */, 268900FE13353E6F00698AC0 /* ThreadPlanCallUserExpression.cpp in Sources */, 268900FF13353E6F00698AC0 /* ThreadPlanShouldStopHere.cpp in Sources */, 2689010013353E6F00698AC0 /* ThreadPlanStepInstruction.cpp in Sources */, + 232CB61B191E00CD00EF39FC /* NativeThreadProtocol.cpp in Sources */, 2689010113353E6F00698AC0 /* ThreadPlanStepOut.cpp in Sources */, 2689010213353E6F00698AC0 /* ThreadPlanStepOverBreakpoint.cpp in Sources */, + 232CB617191E00CD00EF39FC /* NativeBreakpointList.cpp in Sources */, + 232CB615191E00CD00EF39FC /* NativeBreakpoint.cpp in Sources */, 2689010313353E6F00698AC0 /* ThreadPlanStepRange.cpp in Sources */, 2689010413353E6F00698AC0 /* ThreadPlanStepInRange.cpp in Sources */, 2689010513353E6F00698AC0 /* ThreadPlanStepOverRange.cpp in Sources */, @@ -4894,6 +4959,7 @@ 26DB3E191379E7AD0080DC73 /* ABIMacOSX_arm64.cpp in Sources */, 26DB3E1C1379E7AD0080DC73 /* ABIMacOSX_i386.cpp in Sources */, 26DB3E1F1379E7AD0080DC73 /* ABISysV_x86_64.cpp in Sources */, + 232CB61D191E00CD00EF39FC /* SoftwareBreakpoint.cpp in Sources */, 26D1803E16CEBFD300EDFB5B /* KQueue.cpp in Sources */, 26A69C5F137A17A500262477 /* RegisterValue.cpp in Sources */, 2690B3711381D5C300ECFBAE /* Memory.cpp in Sources */, diff --git a/lldb/source/Core/ModuleList.cpp b/lldb/source/Core/ModuleList.cpp index 45cad1b..13a20ed 100644 --- a/lldb/source/Core/ModuleList.cpp +++ b/lldb/source/Core/ModuleList.cpp @@ -1003,6 +1003,7 @@ ModuleList::GetSharedModule file_spec.GetPath(path, sizeof(path)); if (path[0] == '\0') module_file_spec.GetPath(path, sizeof(path)); + // How can this check ever be true? This branch it is false, and we haven't modified file_spec. if (file_spec.Exists()) { std::string uuid_str; diff --git a/lldb/source/Expression/IRMemoryMap.cpp b/lldb/source/Expression/IRMemoryMap.cpp index f7d4a42..3e6ef3b 100644 --- a/lldb/source/Expression/IRMemoryMap.cpp +++ b/lldb/source/Expression/IRMemoryMap.cpp @@ -249,6 +249,7 @@ IRMemoryMap::Allocation::Allocation (lldb::addr_t process_alloc, lldb::addr_t IRMemoryMap::Malloc (size_t size, uint8_t alignment, uint32_t permissions, AllocationPolicy policy, Error &error) { + lldb_private::Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS)); error.Clear(); lldb::ProcessSP process_sp; @@ -280,6 +281,8 @@ IRMemoryMap::Malloc (size_t size, uint8_t alignment, uint32_t permissions, Alloc break; case eAllocationPolicyMirror: process_sp = m_process_wp.lock(); + if (log) + log->Printf ("IRMemoryMap::%s process_sp=0x%" PRIx64 ", process_sp->CanJIT()=%s, process_sp->IsAlive()=%s", __FUNCTION__, (lldb::addr_t) process_sp.get (), process_sp && process_sp->CanJIT () ? "true" : "false", process_sp && process_sp->IsAlive () ? "true" : "false"); if (process_sp && process_sp->CanJIT() && process_sp->IsAlive()) { allocation_address = process_sp->AllocateMemory(allocation_size, permissions, error); @@ -288,6 +291,8 @@ IRMemoryMap::Malloc (size_t size, uint8_t alignment, uint32_t permissions, Alloc } else { + if (log) + log->Printf ("IRMemoryMap::%s switching to eAllocationPolicyHostOnly due to failed condition (see previous expr log message)", __FUNCTION__); policy = eAllocationPolicyHostOnly; allocation_address = FindSpace(allocation_size); if (allocation_address == LLDB_INVALID_ADDRESS) @@ -335,7 +340,7 @@ IRMemoryMap::Malloc (size_t size, uint8_t alignment, uint32_t permissions, Alloc alignment, policy); - if (lldb_private::Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS)) + if (log) { const char * policy_string; diff --git a/lldb/source/Host/common/CMakeLists.txt b/lldb/source/Host/common/CMakeLists.txt index a17a2ab..f61af06 100644 --- a/lldb/source/Host/common/CMakeLists.txt +++ b/lldb/source/Host/common/CMakeLists.txt @@ -8,9 +8,14 @@ add_lldb_library(lldbHostCommon FileSpec.cpp Host.cpp Mutex.cpp + NativeBreakpoint.cpp + NativeBreakpointList.cpp + NativeProcessProtocol.cpp + NativeThreadProtocol.cpp OptionParser.cpp ProcessRunLock.cpp SocketAddress.cpp + SoftwareBreakpoint.cpp Symbols.cpp Terminal.cpp TimeValue.cpp diff --git a/lldb/source/Host/common/NativeBreakpoint.cpp b/lldb/source/Host/common/NativeBreakpoint.cpp new file mode 100644 index 0000000..284d7d1 --- /dev/null +++ b/lldb/source/Host/common/NativeBreakpoint.cpp @@ -0,0 +1,116 @@ +//===-- NativeBreakpoint.cpp ------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "NativeBreakpoint.h" + +#include "lldb/lldb-defines.h" +#include "lldb/Core/Error.h" +#include "lldb/Core/Log.h" + +using namespace lldb_private; + +NativeBreakpoint::NativeBreakpoint (lldb::addr_t addr) : + m_addr (addr), + m_ref_count (1), + m_enabled (true) +{ + assert (addr != LLDB_INVALID_ADDRESS && "breakpoint set for invalid address"); +} + +NativeBreakpoint::~NativeBreakpoint () +{ +} + +void +NativeBreakpoint::AddRef () +{ + ++m_ref_count; + + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); + if (log) + log->Printf ("NativeBreakpoint::%s addr = 0x%" PRIx64 " bumped up, new ref count %" PRIu32, __FUNCTION__, m_addr, m_ref_count); +} + +int32_t +NativeBreakpoint::DecRef () +{ + --m_ref_count; + + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); + if (log) + log->Printf ("NativeBreakpoint::%s addr = 0x%" PRIx64 " ref count decremented, new ref count %" PRIu32, __FUNCTION__, m_addr, m_ref_count); + + return m_ref_count; +} + +Error +NativeBreakpoint::Enable () +{ + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); + + if (m_enabled) + { + // We're already enabled. Just log and exit. + if (log) + log->Printf ("NativeBreakpoint::%s addr = 0x%" PRIx64 " already enabled, ignoring.", __FUNCTION__, m_addr); + return Error (); + } + + // Log and enable. + if (log) + log->Printf ("NativeBreakpoint::%s addr = 0x%" PRIx64 " enabling...", __FUNCTION__, m_addr); + + Error error = DoEnable (); + if (error.Success ()) + { + m_enabled = true; + if (log) + log->Printf ("NativeBreakpoint::%s addr = 0x%" PRIx64 " enable SUCCESS.", __FUNCTION__, m_addr); + } + else + { + if (log) + log->Printf ("NativeBreakpoint::%s addr = 0x%" PRIx64 " enable FAIL: %s", __FUNCTION__, m_addr, error.AsCString ()); + } + + return error; +} + +Error +NativeBreakpoint::Disable () +{ + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); + + if (!m_enabled) + { + // We're already disabled. Just log and exit. + if (log) + log->Printf ("NativeBreakpoint::%s addr = 0x%" PRIx64 " already disabled, ignoring.", __FUNCTION__, m_addr); + return Error (); + } + + // Log and disable. + if (log) + log->Printf ("NativeBreakpoint::%s addr = 0x%" PRIx64 " disabling...", __FUNCTION__, m_addr); + + Error error = DoDisable (); + if (error.Success ()) + { + m_enabled = false; + if (log) + log->Printf ("NativeBreakpoint::%s addr = 0x%" PRIx64 " disable SUCCESS.", __FUNCTION__, m_addr); + } + else + { + if (log) + log->Printf ("NativeBreakpoint::%s addr = 0x%" PRIx64 " disable FAIL: %s", __FUNCTION__, m_addr, error.AsCString ()); + } + + return error; +} diff --git a/lldb/source/Host/common/NativeBreakpoint.h b/lldb/source/Host/common/NativeBreakpoint.h new file mode 100644 index 0000000..367003b --- /dev/null +++ b/lldb/source/Host/common/NativeBreakpoint.h @@ -0,0 +1,66 @@ +//===-- NativeBreakpoint.h --------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_NativeBreakpoint_h_ +#define liblldb_NativeBreakpoint_h_ + +#include "lldb/lldb-types.h" + +namespace lldb_private +{ + class NativeBreakpointList; + + class NativeBreakpoint + { + friend class NativeBreakpointList; + + public: + // The assumption is that derived breakpoints are enabled when created. + NativeBreakpoint (lldb::addr_t addr); + + virtual + ~NativeBreakpoint (); + + Error + Enable (); + + Error + Disable (); + + lldb::addr_t + GetAddress () const { return m_addr; } + + bool + IsEnabled () const { return m_enabled; } + + virtual bool + IsSoftwareBreakpoint () const = 0; + + protected: + const lldb::addr_t m_addr; + int32_t m_ref_count; + + virtual Error + DoEnable () = 0; + + virtual Error + DoDisable () = 0; + + private: + bool m_enabled; + + // ----------------------------------------------------------- + // interface for NativeBreakpointList + // ----------------------------------------------------------- + void AddRef (); + int32_t DecRef (); + }; +} + +#endif // ifndef liblldb_NativeBreakpoint_h_ diff --git a/lldb/source/Host/common/NativeBreakpointList.cpp b/lldb/source/Host/common/NativeBreakpointList.cpp new file mode 100644 index 0000000..ecd0624 --- /dev/null +++ b/lldb/source/Host/common/NativeBreakpointList.cpp @@ -0,0 +1,199 @@ +//===-- NativeBreakpointList.h ----------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "NativeBreakpointList.h" + +#include "lldb/Core/Log.h" + +#include "NativeBreakpoint.h" + +using namespace lldb; +using namespace lldb_private; + +NativeBreakpointList::NativeBreakpointList () : + m_mutex (Mutex::eMutexTypeRecursive) +{ +} + +Error +NativeBreakpointList::AddRef (lldb::addr_t addr, size_t size_hint, bool hardware, CreateBreakpointFunc create_func) +{ + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); + if (log) + log->Printf ("NativeBreakpointList::%s addr = 0x%" PRIx64 ", size_hint = %lu, hardware = %s", __FUNCTION__, addr, size_hint, hardware ? "true" : "false"); + + Mutex::Locker locker (m_mutex); + + // Check if the breakpoint is already set. + auto iter = m_breakpoints.find (addr); + if (iter != m_breakpoints.end ()) + { + // Yes - bump up ref count. + if (log) + log->Printf ("NativeBreakpointList::%s addr = 0x%" PRIx64 " -- already enabled, upping ref count", __FUNCTION__, addr); + + iter->second->AddRef (); + return Error (); + } + + // Create a new breakpoint using the given create func. + if (log) + log->Printf ("NativeBreakpointList::%s creating breakpoint for addr = 0x%" PRIx64 ", size_hint = %lu, hardware = %s", __FUNCTION__, addr, size_hint, hardware ? "true" : "false"); + + NativeBreakpointSP breakpoint_sp; + Error error = create_func (addr, size_hint, hardware, breakpoint_sp); + if (error.Fail ()) + { + if (log) + log->Printf ("NativeBreakpointList::%s creating breakpoint for addr = 0x%" PRIx64 ", size_hint = %lu, hardware = %s -- FAILED: %s", __FUNCTION__, addr, size_hint, hardware ? "true" : "false", error.AsCString ()); + return error; + } + + // Remember the breakpoint. + assert (breakpoint_sp && "NativeBreakpoint create function succeeded but returned NULL breakpoint"); + m_breakpoints.insert (BreakpointMap::value_type (addr, breakpoint_sp)); + + return error; +} + +Error +NativeBreakpointList::DecRef (lldb::addr_t addr) +{ + Error error; + + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); + if (log) + log->Printf ("NativeBreakpointList::%s addr = 0x%" PRIx64, __FUNCTION__, addr); + + Mutex::Locker locker (m_mutex); + + // Check if the breakpoint is already set. + auto iter = m_breakpoints.find (addr); + if (iter == m_breakpoints.end ()) + { + // Not found! + if (log) + log->Printf ("NativeBreakpointList::%s addr = 0x%" PRIx64 " -- NOT FOUND", __FUNCTION__, addr); + error.SetErrorString ("breakpoint not found"); + return error; + } + + // Decrement ref count. + const int32_t new_ref_count = iter->second->DecRef (); + assert (new_ref_count >= 0 && "NativeBreakpoint ref count went negative"); + + if (new_ref_count > 0) + { + // Still references to this breakpoint. Leave it alone. + if (log) + log->Printf ("NativeBreakpointList::%s addr = 0x%" PRIx64 " -- new breakpoint ref count %" PRIu32, __FUNCTION__, addr, new_ref_count); + return error; + } + + // Breakpoint has no more references. Disable it if it's not + // already disabled. + if (log) + log->Printf ("NativeBreakpointList::%s addr = 0x%" PRIx64 " -- removing due to no remaining references", __FUNCTION__, addr); + + // If it's enabled, we need to disable it. + if (iter->second->IsEnabled ()) + { + if (log) + log->Printf ("NativeBreakpointList::%s addr = 0x%" PRIx64 " -- currently enabled, now disabling", __FUNCTION__, addr); + error = iter->second->Disable (); + if (error.Fail ()) + { + if (log) + log->Printf ("NativeBreakpointList::%s addr = 0x%" PRIx64 " -- removal FAILED: %s", __FUNCTION__, addr, error.AsCString ()); + // Continue since we still want to take it out of the breakpoint list. + } + } + else + { + if (log) + log->Printf ("NativeBreakpointList::%s addr = 0x%" PRIx64 " -- already disabled, nothing to do", __FUNCTION__, addr); + } + + // Take the breakpoint out of the list. + if (log) + log->Printf ("NativeBreakpointList::%s addr = 0x%" PRIx64 " -- removed from breakpoint map", __FUNCTION__, addr); + + m_breakpoints.erase (iter); + return error; +} + +Error +NativeBreakpointList::EnableBreakpoint (lldb::addr_t addr) +{ + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); + if (log) + log->Printf ("NativeBreakpointList::%s addr = 0x%" PRIx64, __FUNCTION__, addr); + + Mutex::Locker locker (m_mutex); + + // Ensure we have said breakpoint. + auto iter = m_breakpoints.find (addr); + if (iter == m_breakpoints.end ()) + { + // Not found! + if (log) + log->Printf ("NativeBreakpointList::%s addr = 0x%" PRIx64 " -- NOT FOUND", __FUNCTION__, addr); + return Error ("breakpoint not found"); + } + + // Enable it. + return iter->second->Enable (); +} + +Error +NativeBreakpointList::DisableBreakpoint (lldb::addr_t addr) +{ + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); + if (log) + log->Printf ("NativeBreakpointList::%s addr = 0x%" PRIx64, __FUNCTION__, addr); + + Mutex::Locker locker (m_mutex); + + // Ensure we have said breakpoint. + auto iter = m_breakpoints.find (addr); + if (iter == m_breakpoints.end ()) + { + // Not found! + if (log) + log->Printf ("NativeBreakpointList::%s addr = 0x%" PRIx64 " -- NOT FOUND", __FUNCTION__, addr); + return Error ("breakpoint not found"); + } + + // Disable it. + return iter->second->Disable (); +} + +Error +NativeBreakpointList::GetBreakpoint (lldb::addr_t addr, NativeBreakpointSP &breakpoint_sp) +{ + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); + if (log) + log->Printf ("NativeBreakpointList::%s addr = 0x%" PRIx64, __FUNCTION__, addr); + + Mutex::Locker locker (m_mutex); + + // Ensure we have said breakpoint. + auto iter = m_breakpoints.find (addr); + if (iter == m_breakpoints.end ()) + { + // Not found! + breakpoint_sp.reset (); + return Error ("breakpoint not found"); + } + + // Disable it. + breakpoint_sp = iter->second; + return Error (); +} + diff --git a/lldb/source/Host/common/NativeBreakpointList.h b/lldb/source/Host/common/NativeBreakpointList.h new file mode 100644 index 0000000..5161733 --- /dev/null +++ b/lldb/source/Host/common/NativeBreakpointList.h @@ -0,0 +1,53 @@ +//===-- NativeBreakpointList.h ----------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_NativeBreakpointList_h_ +#define liblldb_NativeBreakpointList_h_ + +#include "lldb/lldb-private-forward.h" +#include "lldb/Core/Error.h" +#include "lldb/Host/Mutex.h" +// #include "lldb/Host/NativeBreakpoint.h" + +#include +#include + +namespace lldb_private +{ + class NativeBreakpointList + { + public: + typedef std::function CreateBreakpointFunc; + + NativeBreakpointList (); + + Error + AddRef (lldb::addr_t addr, size_t size_hint, bool hardware, CreateBreakpointFunc create_func); + + Error + DecRef (lldb::addr_t addr); + + Error + EnableBreakpoint (lldb::addr_t addr); + + Error + DisableBreakpoint (lldb::addr_t addr); + + Error + GetBreakpoint (lldb::addr_t addr, NativeBreakpointSP &breakpoint_sp); + + private: + typedef std::map BreakpointMap; + + Mutex m_mutex; + BreakpointMap m_breakpoints; + }; +} + +#endif // ifndef liblldb_NativeBreakpointList_h_ diff --git a/lldb/source/Host/common/NativeProcessProtocol.cpp b/lldb/source/Host/common/NativeProcessProtocol.cpp new file mode 100644 index 0000000..b0ad4dd --- /dev/null +++ b/lldb/source/Host/common/NativeProcessProtocol.cpp @@ -0,0 +1,397 @@ +//===-- NativeProcessProtocol.cpp -------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "NativeProcessProtocol.h" + +#include "lldb/lldb-enumerations.h" +#include "lldb/Core/ArchSpec.h" +#include "lldb/Core/Log.h" +#include "lldb/Core/State.h" +#include "lldb/Target/NativeRegisterContext.h" + +#include "NativeThreadProtocol.h" +#include "SoftwareBreakpoint.h" + +using namespace lldb; +using namespace lldb_private; + +// ----------------------------------------------------------------------------- +// NativeProcessProtocol Members +// ----------------------------------------------------------------------------- + +NativeProcessProtocol::NativeProcessProtocol (lldb::pid_t pid) : + m_pid (pid), + m_threads (), + m_current_thread_id (LLDB_INVALID_THREAD_ID), + m_threads_mutex (Mutex::eMutexTypeRecursive), + m_state (lldb::eStateInvalid), + m_state_mutex (Mutex::eMutexTypeRecursive), + m_exit_type (eExitTypeInvalid), + m_exit_status (0), + m_exit_description (), + m_delegates_mutex (Mutex::eMutexTypeRecursive), + m_delegates (), + m_breakpoint_list (), + m_terminal_fd (-1), + m_stop_id (0) +{ +} + +lldb_private::Error +NativeProcessProtocol::GetMemoryRegionInfo (lldb::addr_t load_addr, MemoryRegionInfo &range_info) +{ + // Default: not implemented. + return Error ("not implemented"); +} + +bool +NativeProcessProtocol::GetExitStatus (ExitType *exit_type, int *status, std::string &exit_description) +{ + if (m_state == lldb::eStateExited) + { + *exit_type = m_exit_type; + *status = m_exit_status; + exit_description = m_exit_description; + return true; + } + + *status = 0; + return false; +} + +bool +NativeProcessProtocol::SetExitStatus (ExitType exit_type, int status, const char *exit_description, bool bNotifyStateChange) +{ + Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + if (log) + log->Printf ("NativeProcessProtocol::%s(%d, %d, %s, %s) called", + __FUNCTION__, + exit_type, + status, + exit_description ? exit_description : "nullptr", + bNotifyStateChange ? "true" : "false"); + + // Exit status already set + if (m_state == lldb::eStateExited) + { + if (log) + log->Printf ("NativeProcessProtocol::%s exit status already set to %d, ignoring new set to %d", __FUNCTION__, m_exit_status, status); + return false; + } + + m_state = lldb::eStateExited; + + m_exit_type = exit_type; + m_exit_status = status; + if (exit_description && exit_description[0]) + m_exit_description = exit_description; + else + m_exit_description.clear(); + + if (bNotifyStateChange) + SynchronouslyNotifyProcessStateChanged (lldb::eStateExited); + + return true; +} + +NativeThreadProtocolSP +NativeProcessProtocol::GetThreadAtIndex (uint32_t idx) +{ + Mutex::Locker locker (m_threads_mutex); + if (idx < m_threads.size ()) + return m_threads[idx]; + return NativeThreadProtocolSP (); +} + +NativeThreadProtocolSP +NativeProcessProtocol::GetThreadByID (lldb::tid_t tid) +{ + Mutex::Locker locker (m_threads_mutex); + for (auto thread_sp : m_threads) + { + if (thread_sp->GetID() == tid) + return thread_sp; + } + return NativeThreadProtocolSP (); +} + +bool +NativeProcessProtocol::IsAlive () const +{ + return m_state != eStateDetached + && m_state != eStateExited + && m_state != eStateInvalid + && m_state != eStateUnloaded; +} + +bool +NativeProcessProtocol::GetByteOrder (lldb::ByteOrder &byte_order) const +{ + ArchSpec process_arch; + if (!GetArchitecture (process_arch)) + return false; + byte_order = process_arch.GetByteOrder (); + return true; +} + +uint32_t +NativeProcessProtocol::GetMaxWatchpoints () const +{ + // This default implementation will return the number of + // *hardware* breakpoints available. MacOSX and other OS + // implementations that support software breakpoints will want to + // override this correctly for their implementation. + Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + + // get any thread + NativeThreadProtocolSP thread_sp (const_cast (this)->GetThreadAtIndex (0)); + if (!thread_sp) + { + if (log) + log->Warning ("NativeProcessProtocol::%s (): failed to find a thread to grab a NativeRegisterContext!", __FUNCTION__); + return 0; + } + + NativeRegisterContextSP reg_ctx_sp (thread_sp->GetRegisterContext ()); + if (!reg_ctx_sp) + { + if (log) + log->Warning ("NativeProcessProtocol::%s (): failed to get a RegisterContextNativeProcess from the first thread!", __FUNCTION__); + return 0; + } + + return reg_ctx_sp->NumSupportedHardwareWatchpoints (); +} + +Error +NativeProcessProtocol::SetWatchpoint (lldb::addr_t addr, size_t size, uint32_t watch_flags, bool hardware) +{ + // This default implementation assumes setting the watchpoint for + // the process will require setting the watchpoint for each of the + // threads. Furthermore, it will track watchpoints set for the + // process and will add them to each thread that is attached to + // via the (FIXME implement) OnThreadAttached () method. + + Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + + // FIXME save the watchpoint on the set of process watchpoint vars + // so we can add them to a thread each time a new thread is registered. + + // Update the thread list + UpdateThreads (); + + // Keep track of the threads we successfully set the watchpoint + // for. If one of the thread watchpoint setting operations fails, + // back off and remove the watchpoint for all the threads that + // were successfully set so we get back to a consistent state. + std::vector watchpoint_established_threads; + + // Tell each thread to set a watchpoint. In the event that + // hardware watchpoints are requested but the SetWatchpoint fails, + // try to set a software watchpoint as a fallback. It's + // conceivable that if there are more threads than hardware + // watchpoints available, some of the threads will fail to set + // hardware watchpoints while software ones may be available. + Mutex::Locker locker (m_threads_mutex); + for (auto thread_sp : m_threads) + { + assert (thread_sp && "thread list should not have a NULL thread!"); + if (!thread_sp) + continue; + + Error thread_error = thread_sp->SetWatchpoint (addr, size, watch_flags, hardware); + if (thread_error.Fail () && hardware) + { + // Try software watchpoints since we failed on hardware watchpoint setting + // and we may have just run out of hardware watchpoints. + thread_error = thread_sp->SetWatchpoint (addr, size, watch_flags, false); + if (thread_error.Success ()) + { + if (log) + log->Warning ("hardware watchpoint requested but software watchpoint set"); + } + } + + if (thread_error.Success ()) + { + // Remember that we set this watchpoint successfully in + // case we need to clear it later. + watchpoint_established_threads.push_back (thread_sp); + } + else + { + // Unset the watchpoint for each thread we successfully + // set so that we get back to a consistent state of "not + // set" for the watchpoint. + for (auto unwatch_thread_sp : watchpoint_established_threads) + { + Error remove_error = unwatch_thread_sp->RemoveWatchpoint (addr); + if (remove_error.Fail () && log) + { + log->Warning ("NativeProcessProtocol::%s (): RemoveWatchpoint failed for pid=%" PRIu64 ", tid=%" PRIu64 ": %s", + __FUNCTION__, GetID (), unwatch_thread_sp->GetID (), remove_error.AsCString ()); + } + } + + return thread_error; + } + } + return Error (); +} + +Error +NativeProcessProtocol::RemoveWatchpoint (lldb::addr_t addr) +{ + // FIXME remove the watchpoint on the set of process watchpoint vars + // so we can add them to a thread each time a new thread is registered. + + // Update the thread list + UpdateThreads (); + + Error overall_error; + + Mutex::Locker locker (m_threads_mutex); + for (auto thread_sp : m_threads) + { + assert (thread_sp && "thread list should not have a NULL thread!"); + if (!thread_sp) + continue; + + const Error thread_error = thread_sp->RemoveWatchpoint (addr); + if (thread_error.Fail ()) + { + // Keep track of the first thread error if any threads + // fail. We want to try to remove the watchpoint from + // every thread, though, even if one or more have errors. + if (!overall_error.Fail ()) + overall_error = thread_error; + } + } + return overall_error; +} + +bool +NativeProcessProtocol::RegisterNativeDelegate (NativeDelegate &native_delegate) +{ + Mutex::Locker locker (m_delegates_mutex); + if (std::find (m_delegates.begin (), m_delegates.end (), &native_delegate) != m_delegates.end ()) + return false; + + m_delegates.push_back (&native_delegate); + native_delegate.InitializeDelegate (this); + return true; +} + +bool +NativeProcessProtocol::UnregisterNativeDelegate (NativeDelegate &native_delegate) +{ + Mutex::Locker locker (m_delegates_mutex); + + const auto initial_size = m_delegates.size (); + m_delegates.erase (remove (m_delegates.begin (), m_delegates.end (), &native_delegate), m_delegates.end ()); + + // We removed the delegate if the count of delegates shrank after + // removing all copies of the given native_delegate from the vector. + return m_delegates.size () < initial_size; +} + +void +NativeProcessProtocol::SynchronouslyNotifyProcessStateChanged (lldb::StateType state) +{ + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + + Mutex::Locker locker (m_delegates_mutex); + for (auto native_delegate: m_delegates) + native_delegate->ProcessStateChanged (this, state); + + if (log) + { + if (!m_delegates.empty ()) + { + log->Printf ("NativeProcessProtocol::%s: sent state notification [%s] from process %" PRIu64, + __FUNCTION__, lldb_private::StateAsCString (state), GetID ()); + } + else + { + log->Printf ("NativeProcessProtocol::%s: would send state notification [%s] from process %" PRIu64 ", but no delegates", + __FUNCTION__, lldb_private::StateAsCString (state), GetID ()); + } + } +} + +Error +NativeProcessProtocol::SetSoftwareBreakpoint (lldb::addr_t addr, uint32_t size_hint) +{ + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); + if (log) + log->Printf ("NativeProcessProtocol::%s addr = 0x%" PRIx64, __FUNCTION__, addr); + + return m_breakpoint_list.AddRef (addr, size_hint, false, + [this] (lldb::addr_t addr, size_t size_hint, bool /* hardware */, NativeBreakpointSP &breakpoint_sp)->Error + { return SoftwareBreakpoint::CreateSoftwareBreakpoint (*this, addr, size_hint, breakpoint_sp); }); +} + +Error +NativeProcessProtocol::RemoveBreakpoint (lldb::addr_t addr) +{ + return m_breakpoint_list.DecRef (addr); +} + +Error +NativeProcessProtocol::EnableBreakpoint (lldb::addr_t addr) +{ + return m_breakpoint_list.EnableBreakpoint (addr); +} + +Error +NativeProcessProtocol::DisableBreakpoint (lldb::addr_t addr) +{ + return m_breakpoint_list.DisableBreakpoint (addr); +} + +lldb::StateType +NativeProcessProtocol::GetState () const +{ + Mutex::Locker locker (m_state_mutex); + return m_state; +} + +void +NativeProcessProtocol::SetState (lldb::StateType state, bool notify_delegates) +{ + Mutex::Locker locker (m_state_mutex); + m_state = state; + + if (StateIsStoppedState (state, false)) + { + ++m_stop_id; + + // Give process a chance to do any stop id bump processing, such as + // clearing cached data that is invalidated each time the process runs. + // Note if/when we support some threads running, we'll end up needing + // to manage this per thread and per process. + DoStopIDBumped (m_stop_id); + } + + // Optionally notify delegates of the state change. + if (notify_delegates) + SynchronouslyNotifyProcessStateChanged (state); +} + +uint32_t NativeProcessProtocol::GetStopID () const +{ + Mutex::Locker locker (m_state_mutex); + return m_stop_id; +} + +void +NativeProcessProtocol::DoStopIDBumped (uint32_t /* newBumpId */) +{ + // Default implementation does nothing. +} diff --git a/lldb/source/Host/common/NativeProcessProtocol.h b/lldb/source/Host/common/NativeProcessProtocol.h new file mode 100644 index 0000000..a2f42cd --- /dev/null +++ b/lldb/source/Host/common/NativeProcessProtocol.h @@ -0,0 +1,321 @@ +//===-- NativeProcessProtocol.h ---------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_NativeProcessProtocol_h_ +#define liblldb_NativeProcessProtocol_h_ + +#include + +#include "lldb/lldb-private-forward.h" +#include "lldb/lldb-types.h" +#include "lldb/Core/Error.h" +#include "lldb/Host/Mutex.h" + +#include "NativeBreakpointList.h" + +namespace lldb_private +{ + class MemoryRegionInfo; + class ResumeActionList; + + //------------------------------------------------------------------ + // NativeProcessProtocol + //------------------------------------------------------------------ + class NativeProcessProtocol : + public std::enable_shared_from_this + { + friend class SoftwareBreakpoint; + + public: + static NativeProcessProtocol * + CreateInstance (lldb::pid_t pid); + + // lldb_private::Host calls should be used to launch a process for debugging, and + // then the process should be attached to. When attaching to a process + // lldb_private::Host calls should be used to locate the process to attach to, + // and then this function should be called. + NativeProcessProtocol (lldb::pid_t pid); + + public: + virtual ~NativeProcessProtocol () + { + } + + virtual Error + Resume (const ResumeActionList &resume_actions) = 0; + + virtual Error + Halt () = 0; + + virtual Error + Detach () = 0; + + //------------------------------------------------------------------ + /// Sends a process a UNIX signal \a signal. + /// + /// Implementer note: the WillSignal ()/DidSignal () calls + /// from the Process class are not replicated here since no + /// concrete classes implemented any behavior for those and + /// put all the work in DoSignal (...). + /// + /// @return + /// Returns an error object. + //------------------------------------------------------------------ + virtual Error + Signal (int signo) = 0; + + virtual Error + Kill () = 0; + + //---------------------------------------------------------------------- + // Memory and memory region functions + //---------------------------------------------------------------------- + + virtual Error + GetMemoryRegionInfo (lldb::addr_t load_addr, MemoryRegionInfo &range_info); + + virtual Error + ReadMemory (lldb::addr_t addr, void *buf, lldb::addr_t size, lldb::addr_t &bytes_read) = 0; + + virtual Error + WriteMemory (lldb::addr_t addr, const void *buf, lldb::addr_t size, lldb::addr_t &bytes_written) = 0; + + virtual Error + AllocateMemory (lldb::addr_t size, uint32_t permissions, lldb::addr_t &addr) = 0; + + virtual Error + DeallocateMemory (lldb::addr_t addr) = 0; + + virtual lldb::addr_t + GetSharedLibraryInfoAddress () = 0; + + virtual bool + IsAlive () const; + + virtual size_t + UpdateThreads () = 0; + + virtual bool + GetArchitecture (ArchSpec &arch) const = 0; + + //---------------------------------------------------------------------- + // Breakpoint functions + //---------------------------------------------------------------------- + virtual Error + SetBreakpoint (lldb::addr_t addr, uint32_t size, bool hardware) = 0; + + virtual Error + RemoveBreakpoint (lldb::addr_t addr); + + virtual Error + EnableBreakpoint (lldb::addr_t addr); + + virtual Error + DisableBreakpoint (lldb::addr_t addr); + + //---------------------------------------------------------------------- + // Watchpoint functions + //---------------------------------------------------------------------- + virtual uint32_t + GetMaxWatchpoints () const; + + virtual Error + SetWatchpoint (lldb::addr_t addr, size_t size, uint32_t watch_flags, bool hardware); + + virtual Error + RemoveWatchpoint (lldb::addr_t addr); + + //---------------------------------------------------------------------- + // Accessors + //---------------------------------------------------------------------- + lldb::pid_t + GetID() const + { + return m_pid; + } + + lldb::StateType + GetState () const; + + bool + IsRunning () const + { + return m_state == lldb::eStateRunning || IsStepping(); + } + + bool + IsStepping () const + { + return m_state == lldb::eStateStepping; + } + + bool + CanResume () const + { + return m_state == lldb::eStateStopped; + } + + bool + GetByteOrder (lldb::ByteOrder &byte_order) const; + + //---------------------------------------------------------------------- + // Exit Status + //---------------------------------------------------------------------- + virtual bool + GetExitStatus (lldb_private::ExitType *exit_type, int *status, std::string &exit_description); + + virtual bool + SetExitStatus (lldb_private::ExitType exit_type, int status, const char *exit_description, bool bNotifyStateChange); + + //---------------------------------------------------------------------- + // Access to threads + //---------------------------------------------------------------------- + NativeThreadProtocolSP + GetThreadAtIndex (uint32_t idx); + + NativeThreadProtocolSP + GetThreadByID (lldb::tid_t tid); + + void + SetCurrentThreadID (lldb::tid_t tid) + { + m_current_thread_id = tid; + } + + lldb::tid_t + GetCurrentThreadID () + { + return m_current_thread_id; + } + + NativeThreadProtocolSP + GetCurrentThread () + { + return GetThreadByID (m_current_thread_id); + } + + //---------------------------------------------------------------------- + // Access to inferior stdio + //---------------------------------------------------------------------- + virtual + int GetTerminalFileDescriptor () + { + return m_terminal_fd; + } + + //---------------------------------------------------------------------- + // Stop id interface + //---------------------------------------------------------------------- + + uint32_t + GetStopID () const; + + // --------------------------------------------------------------------- + // Callbacks for low-level process state changes + // --------------------------------------------------------------------- + class NativeDelegate + { + public: + virtual + ~NativeDelegate () {} + + virtual void + InitializeDelegate (NativeProcessProtocol *process) = 0; + + virtual void + ProcessStateChanged (NativeProcessProtocol *process, lldb::StateType state) = 0; + }; + + //------------------------------------------------------------------ + /// Register a native delegate. + /// + /// Clients can register nofication callbacks by passing in a + /// NativeDelegate impl and passing it into this function. + /// + /// Note: it is required that the lifetime of the + /// native_delegate outlive the NativeProcessProtocol. + /// + /// @param[in] native_delegate + /// A NativeDelegate impl to be called when certain events + /// happen within the NativeProcessProtocol or related threads. + /// + /// @return + /// true if the delegate was registered successfully; + /// false if the delegate was already registered. + /// + /// @see NativeProcessProtocol::NativeDelegate. + //------------------------------------------------------------------ + bool + RegisterNativeDelegate (NativeDelegate &native_delegate); + + //------------------------------------------------------------------ + /// Unregister a native delegate previously registered. + /// + /// @param[in] native_delegate + /// A NativeDelegate impl previously registered with this process. + /// + /// @return Returns \b true if the NativeDelegate was + /// successfully removed from the process, \b false otherwise. + /// + /// @see NativeProcessProtocol::NativeDelegate + //------------------------------------------------------------------ + bool + UnregisterNativeDelegate (NativeDelegate &native_delegate); + + protected: + lldb::pid_t m_pid; + + std::vector m_threads; + lldb::tid_t m_current_thread_id; + mutable Mutex m_threads_mutex; + + lldb::StateType m_state; + mutable Mutex m_state_mutex; + + lldb_private::ExitType m_exit_type; + int m_exit_status; + std::string m_exit_description; + Mutex m_delegates_mutex; + std::vector m_delegates; + NativeBreakpointList m_breakpoint_list; + int m_terminal_fd; + uint32_t m_stop_id; + + // ----------------------------------------------------------- + // Internal interface for state handling + // ----------------------------------------------------------- + void + SetState (lldb::StateType state, bool notify_delegates = true); + + // Derived classes need not impelment this. It can be used as a + // hook to clear internal caches that should be invalidated when + // stop ids change. + // + // Note this function is called with the state mutex obtained + // by the caller. + virtual void + DoStopIDBumped (uint32_t newBumpId); + + // ----------------------------------------------------------- + // Internal interface for software breakpoints + // ----------------------------------------------------------- + Error + SetSoftwareBreakpoint (lldb::addr_t addr, uint32_t size_hint); + + virtual Error + GetSoftwareBreakpointTrapOpcode (size_t trap_opcode_size_hint, size_t &actual_opcode_size, const uint8_t *&trap_opcode_bytes) = 0; + + private: + + void + SynchronouslyNotifyProcessStateChanged (lldb::StateType state); + }; +} + +#endif // #ifndef liblldb_NativeProcessProtocol_h_ diff --git a/lldb/source/Host/common/NativeThreadProtocol.cpp b/lldb/source/Host/common/NativeThreadProtocol.cpp new file mode 100644 index 0000000..6cef5b1 --- /dev/null +++ b/lldb/source/Host/common/NativeThreadProtocol.cpp @@ -0,0 +1,97 @@ +//===-- NativeThreadProtocol.cpp --------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "NativeThreadProtocol.h" + +#include "NativeProcessProtocol.h" +#include "lldb/Target/NativeRegisterContext.h" +#include "SoftwareBreakpoint.h" + +using namespace lldb; +using namespace lldb_private; + +NativeThreadProtocol::NativeThreadProtocol (NativeProcessProtocol *process, lldb::tid_t tid) : + m_process_wp (process->shared_from_this ()), + m_tid (tid) +{ +} + +Error +NativeThreadProtocol::ReadRegister (uint32_t reg, RegisterValue ®_value) +{ + NativeRegisterContextSP register_context_sp = GetRegisterContext (); + if (!register_context_sp) + return Error ("no register context"); + + const RegisterInfo *const reg_info = register_context_sp->GetRegisterInfoAtIndex (reg); + if (!reg_info) + return Error ("no register info for reg num %" PRIu32, reg); + + return register_context_sp->ReadRegister (reg_info, reg_value);; +} + +Error +NativeThreadProtocol::WriteRegister (uint32_t reg, const RegisterValue ®_value) +{ + NativeRegisterContextSP register_context_sp = GetRegisterContext (); + if (!register_context_sp) + return Error ("no register context"); + + const RegisterInfo *const reg_info = register_context_sp->GetRegisterInfoAtIndex (reg); + if (!reg_info) + return Error ("no register info for reg num %" PRIu32, reg); + + return register_context_sp->WriteRegister (reg_info, reg_value); +} + +Error +NativeThreadProtocol::SaveAllRegisters (lldb::DataBufferSP &data_sp) +{ + NativeRegisterContextSP register_context_sp = GetRegisterContext (); + if (!register_context_sp) + return Error ("no register context"); + return register_context_sp->WriteAllRegisterValues (data_sp); +} + +Error +NativeThreadProtocol::RestoreAllRegisters (lldb::DataBufferSP &data_sp) +{ + NativeRegisterContextSP register_context_sp = GetRegisterContext (); + if (!register_context_sp) + return Error ("no register context"); + return register_context_sp->ReadAllRegisterValues (data_sp); +} + +NativeProcessProtocolSP +NativeThreadProtocol::GetProcess () +{ + return m_process_wp.lock (); +} + +uint32_t +NativeThreadProtocol::TranslateStopInfoToGdbSignal (const ThreadStopInfo &stop_info) const +{ + // Default: no translation. Do the real translation where there + // is access to the host signal numbers. + switch (stop_info.reason) + { + case eStopReasonSignal: + return stop_info.details.signal.signo; + break; + + case eStopReasonException: + // FIXME verify the way to specify pass-thru here. + return static_cast (stop_info.details.exception.type); + break; + + default: + assert (0 && "unexpected stop_info.reason found"); + return 0; + } +} diff --git a/lldb/source/Host/common/NativeThreadProtocol.h b/lldb/source/Host/common/NativeThreadProtocol.h new file mode 100644 index 0000000..9b404be --- /dev/null +++ b/lldb/source/Host/common/NativeThreadProtocol.h @@ -0,0 +1,85 @@ +//===-- NativeThreadProtocol.h ----------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_NativeThreadProtocol_h_ +#define liblldb_NativeThreadProtocol_h_ + +#include + +#include "lldb/lldb-private-forward.h" +#include "lldb/lldb-types.h" +#include "lldb/Host/Debug.h" + +namespace lldb_private +{ + //------------------------------------------------------------------ + // NativeThreadProtocol + //------------------------------------------------------------------ + class NativeThreadProtocol: + public std::enable_shared_from_this + { + public: + NativeThreadProtocol (NativeProcessProtocol *process, lldb::tid_t tid); + + virtual ~NativeThreadProtocol() + { + } + + virtual const char * + GetName() = 0; + + virtual lldb::StateType + GetState () = 0; + + virtual NativeRegisterContextSP + GetRegisterContext () = 0; + + virtual Error + ReadRegister (uint32_t reg, RegisterValue ®_value); + + virtual Error + WriteRegister (uint32_t reg, const RegisterValue ®_value); + + virtual Error + SaveAllRegisters (lldb::DataBufferSP &data_sp); + + virtual Error + RestoreAllRegisters (lldb::DataBufferSP &data_sp); + + virtual bool + GetStopReason (ThreadStopInfo &stop_info) = 0; + + virtual uint32_t + TranslateStopInfoToGdbSignal (const ThreadStopInfo &stop_info) const; + + lldb::tid_t + GetID() const + { + return m_tid; + } + + NativeProcessProtocolSP + GetProcess (); + + // --------------------------------------------------------------------- + // Thread-specific watchpoints + // --------------------------------------------------------------------- + virtual Error + SetWatchpoint (lldb::addr_t addr, size_t size, uint32_t watch_flags, bool hardware) = 0; + + virtual Error + RemoveWatchpoint (lldb::addr_t addr) = 0; + + protected: + NativeProcessProtocolWP m_process_wp; + lldb::tid_t m_tid; + }; +} + +#endif // #ifndef liblldb_NativeThreadProtocol_h_ diff --git a/lldb/source/Host/common/SoftwareBreakpoint.cpp b/lldb/source/Host/common/SoftwareBreakpoint.cpp new file mode 100644 index 0000000..fe2f504 --- /dev/null +++ b/lldb/source/Host/common/SoftwareBreakpoint.cpp @@ -0,0 +1,296 @@ +//===-- SoftwareBreakpoint.cpp ----------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "SoftwareBreakpoint.h" + +#include "lldb/Core/Error.h" +#include "lldb/Core/Log.h" +#include "lldb/Host/Debug.h" +#include "lldb/Host/Mutex.h" + +#include "NativeProcessProtocol.h" + +using namespace lldb_private; + +// ------------------------------------------------------------------- +// static members +// ------------------------------------------------------------------- + +Error +SoftwareBreakpoint::CreateSoftwareBreakpoint (NativeProcessProtocol &process, lldb::addr_t addr, size_t size_hint, NativeBreakpointSP &breakpoint_sp) +{ + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); + if (log) + log->Printf ("SoftwareBreakpoint::%s addr = 0x%" PRIx64, __FUNCTION__, addr); + + // Validate the address. + if (addr == LLDB_INVALID_ADDRESS) + return Error ("SoftwareBreakpoint::%s invalid load address specified.", __FUNCTION__); + + // Ask the NativeProcessProtocol subclass to fill in the correct software breakpoint + // trap for the breakpoint site. + size_t bp_opcode_size = 0; + const uint8_t *bp_opcode_bytes = NULL; + Error error = process.GetSoftwareBreakpointTrapOpcode (size_hint, bp_opcode_size, bp_opcode_bytes); + + if (error.Fail ()) + { + if (log) + log->Printf ("SoftwareBreakpoint::%s failed to retrieve software breakpoint trap opcode: %s", __FUNCTION__, error.AsCString ()); + return error; + } + + // Validate size of trap opcode. + if (bp_opcode_size == 0) + { + if (log) + log->Printf ("SoftwareBreakpoint::%s failed to retrieve any trap opcodes", __FUNCTION__); + return Error ("SoftwareBreakpoint::GetSoftwareBreakpointTrapOpcode() returned zero, unable to get breakpoint trap for address 0x%" PRIx64, addr); + } + + if (bp_opcode_size > MAX_TRAP_OPCODE_SIZE) + { + if (log) + log->Printf ("SoftwareBreakpoint::%s cannot support %lu trapcode bytes, max size is %lu", __FUNCTION__, bp_opcode_size, MAX_TRAP_OPCODE_SIZE); + return Error ("SoftwareBreakpoint::GetSoftwareBreakpointTrapOpcode() returned too many trap opcode bytes: requires %lu but we only support a max of %lu", bp_opcode_size, MAX_TRAP_OPCODE_SIZE); + } + + // Validate that we received opcodes. + if (!bp_opcode_bytes) + { + if (log) + log->Printf ("SoftwareBreakpoint::%s failed to retrieve trap opcode bytes", __FUNCTION__); + return Error ("SoftwareBreakpoint::GetSoftwareBreakpointTrapOpcode() returned NULL trap opcode bytes, unable to get breakpoint trap for address 0x%" PRIx64, addr); + } + + // Enable the breakpoint. + uint8_t saved_opcode_bytes [MAX_TRAP_OPCODE_SIZE]; + error = EnableSoftwareBreakpoint (process, addr, bp_opcode_size, bp_opcode_bytes, saved_opcode_bytes); + if (error.Fail ()) + { + if (log) + log->Printf ("SoftwareBreakpoint::%s: failed to enable new breakpoint at 0x%" PRIx64 ": %s", __FUNCTION__, addr, error.AsCString ()); + return error; + } + + if (log) + log->Printf ("SoftwareBreakpoint::%s addr = 0x%" PRIx64 " -- SUCCESS", __FUNCTION__, addr); + + // Set the breakpoint and verified it was written properly. Now + // create a breakpoint remover that understands how to undo this + // breakpoint. + breakpoint_sp.reset (new SoftwareBreakpoint (process, addr, saved_opcode_bytes, bp_opcode_bytes, bp_opcode_size)); + return Error (); +} + +Error +SoftwareBreakpoint::EnableSoftwareBreakpoint (NativeProcessProtocol &process, lldb::addr_t addr, size_t bp_opcode_size, const uint8_t *bp_opcode_bytes, uint8_t *saved_opcode_bytes) +{ + assert (bp_opcode_size <= MAX_TRAP_OPCODE_SIZE && "bp_opcode_size out of valid range"); + assert (bp_opcode_bytes && "bp_opcode_bytes is NULL"); + assert (saved_opcode_bytes && "saved_opcode_bytes is NULL"); + + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); + if (log) + log->Printf ("SoftwareBreakpoint::%s addr = 0x%" PRIx64, __FUNCTION__, addr); + + // Save the original opcodes by reading them so we can restore later. + lldb::addr_t bytes_read = 0; + + Error error = process.ReadMemory(addr, saved_opcode_bytes, static_cast (bp_opcode_size), bytes_read); + if (error.Fail ()) + { + if (log) + log->Printf ("SoftwareBreakpoint::%s failed to read memory while attempting to set breakpoint: %s", __FUNCTION__, error.AsCString ()); + return error; + } + + // Ensure we read as many bytes as we expected. + if (bytes_read != static_cast (bp_opcode_size)) + { + if (log) + log->Printf ("SoftwareBreakpoint::%s failed to read memory while attempting to set breakpoint: attempted to read %lu bytes but only read %" PRIu64, __FUNCTION__, bp_opcode_size, bytes_read); + return Error ("SoftwareBreakpoint::%s failed to read memory while attempting to set breakpoint: attempted to read %lu bytes but only read %" PRIu64, __FUNCTION__, bp_opcode_size, bytes_read); + } + + // Write a software breakpoint in place of the original opcode. + lldb::addr_t bytes_written = 0; + error = process.WriteMemory (addr, bp_opcode_bytes, static_cast (bp_opcode_size), bytes_written); + if (error.Fail ()) + { + if (log) + log->Printf ("SoftwareBreakpoint::%s failed to write memory while attempting to set breakpoint: %s", __FUNCTION__, error.AsCString ()); + return error; + } + + // Ensure we wrote as many bytes as we expected. + if (bytes_written != static_cast (bp_opcode_size)) + { + error.SetErrorStringWithFormat("SoftwareBreakpoint::%s failed write memory while attempting to set breakpoint: attempted to write %lu bytes but only wrote %" PRIu64, __FUNCTION__, bp_opcode_size, bytes_written); + if (log) + log->PutCString (error.AsCString ()); + return error; + } + + uint8_t verify_bp_opcode_bytes [MAX_TRAP_OPCODE_SIZE]; + lldb::addr_t verify_bytes_read = 0; + error = process.ReadMemory(addr, verify_bp_opcode_bytes, static_cast (bp_opcode_size), verify_bytes_read); + if (error.Fail ()) + { + if (log) + log->Printf ("SoftwareBreakpoint::%s failed to read memory while attempting to verify the breakpoint set: %s", __FUNCTION__, error.AsCString ()); + return error; + } + + // Ensure we read as many verification bytes as we expected. + if (verify_bytes_read != static_cast (bp_opcode_size)) + { + if (log) + log->Printf ("SoftwareBreakpoint::%s failed to read memory while attempting to verify breakpoint: attempted to read %lu bytes but only read %" PRIu64, __FUNCTION__, bp_opcode_size, verify_bytes_read); + return Error ("SoftwareBreakpoint::%s failed to read memory while attempting to verify breakpoint: attempted to read %lu bytes but only read %" PRIu64, __FUNCTION__, bp_opcode_size, verify_bytes_read); + } + + if (::memcmp(bp_opcode_bytes, verify_bp_opcode_bytes, bp_opcode_size) != 0) + { + if (log) + log->Printf ("SoftwareBreakpoint::%s: verification of software breakpoint writing failed - trap opcodes not successfully read back after writing when setting breakpoint at 0x%" PRIx64, __FUNCTION__, addr); + return Error ("SoftwareBreakpoint::%s: verification of software breakpoint writing failed - trap opcodes not successfully read back after writing when setting breakpoint at 0x%" PRIx64, __FUNCTION__, addr); + } + + if (log) + log->Printf ("SoftwareBreakpoint::%s addr = 0x%" PRIx64 " -- SUCCESS", __FUNCTION__, addr); + + return Error (); +} + +// ------------------------------------------------------------------- +// instance-level members +// ------------------------------------------------------------------- + +SoftwareBreakpoint::SoftwareBreakpoint (NativeProcessProtocol &process, lldb::addr_t addr, const uint8_t *saved_opcodes, const uint8_t *trap_opcodes, size_t opcode_size) : + NativeBreakpoint (addr), + m_process (process), + m_saved_opcodes (), + m_trap_opcodes (), + m_opcode_size (opcode_size) +{ + assert ( opcode_size > 0 && "setting software breakpoint with no trap opcodes"); + assert ( opcode_size <= MAX_TRAP_OPCODE_SIZE && "trap opcode size too large"); + + ::memcpy (m_saved_opcodes, saved_opcodes, opcode_size); + ::memcpy (m_trap_opcodes, trap_opcodes, opcode_size); +} + +Error +SoftwareBreakpoint::DoEnable () +{ + return EnableSoftwareBreakpoint (m_process, m_addr, m_opcode_size, m_trap_opcodes, m_saved_opcodes); +} + +Error +SoftwareBreakpoint::DoDisable () +{ + Error error; + assert (m_addr && (m_addr != LLDB_INVALID_ADDRESS) && "can't remove a software breakpoint for an invalid address"); + + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); + if (log) + log->Printf ("SoftwareBreakpoint::%s addr = 0x%" PRIx64, __FUNCTION__, m_addr); + + assert ( (m_opcode_size > 0) && "cannot restore opcodes when there are no opcodes"); + + if (m_opcode_size > 0) + { + // Clear a software breakoint instruction + uint8_t curr_break_op [MAX_TRAP_OPCODE_SIZE]; + bool break_op_found = false; + assert (m_opcode_size <= sizeof (curr_break_op)); + + // Read the breakpoint opcode + lldb::addr_t bytes_read = 0; + error = m_process.ReadMemory (m_addr, curr_break_op, m_opcode_size, bytes_read); + if (error.Success () && (bytes_read < static_cast (m_opcode_size))) + { + error.SetErrorStringWithFormat ("SoftwareBreakpointr::%s addr=0x%" PRIx64 ": tried to read %lu bytes but only read %" PRIu64, __FUNCTION__, m_addr, m_opcode_size, bytes_read); + } + if (error.Success ()) + { + bool verify = false; + // Make sure we have the a breakpoint opcode exists at this address + if (::memcmp (curr_break_op, m_trap_opcodes, m_opcode_size) == 0) + { + break_op_found = true; + // We found a valid breakpoint opcode at this address, now restore + // the saved opcode. + lldb::addr_t bytes_written = 0; + error = m_process.WriteMemory (m_addr, m_saved_opcodes, m_opcode_size, bytes_written); + if (error.Success () && (bytes_written < static_cast (m_opcode_size))) + { + error.SetErrorStringWithFormat ("SoftwareBreakpoint::%s addr=0x%" PRIx64 ": tried to write %lu bytes but only wrote %" PRIu64, __FUNCTION__, m_addr, m_opcode_size, bytes_written); + } + if (error.Success ()) + { + verify = true; + } + } + else + { + error.SetErrorString("Original breakpoint trap is no longer in memory."); + // Set verify to true and so we can check if the original opcode has already been restored + verify = true; + } + + if (verify) + { + uint8_t verify_opcode [MAX_TRAP_OPCODE_SIZE]; + assert (m_opcode_size <= sizeof (verify_opcode)); + // Verify that our original opcode made it back to the inferior + + lldb::addr_t verify_bytes_read = 0; + error = m_process.ReadMemory (m_addr, verify_opcode, m_opcode_size, verify_bytes_read); + if (error.Success () && (verify_bytes_read < static_cast (m_opcode_size))) + { + error.SetErrorStringWithFormat ("SoftwareBreakpoint::%s addr=0x%" PRIx64 ": tried to read %lu verification bytes but only read %" PRIu64, __FUNCTION__, m_addr, m_opcode_size, verify_bytes_read); + } + if (error.Success ()) + { + // compare the memory we just read with the original opcode + if (::memcmp (m_saved_opcodes, verify_opcode, m_opcode_size) == 0) + { + // SUCCESS + if (log) + log->Printf ("SoftwareBreakpoint::%s addr = 0x%" PRIx64 " -- SUCCESS", __FUNCTION__, m_addr); + return error; + } + else + { + if (break_op_found) + error.SetErrorString("Failed to restore original opcode."); + } + } + else + error.SetErrorString("Failed to read memory to verify that breakpoint trap was restored."); + } + } + } + + if (log && error.Fail ()) + log->Printf ("SoftwareBreakpoint::%s addr = 0x%" PRIx64 " -- FAILED: %s", + __FUNCTION__, + m_addr, + error.AsCString()); + return error; +} + +bool +SoftwareBreakpoint::IsSoftwareBreakpoint () const +{ + return true; +} + diff --git a/lldb/source/Host/common/SoftwareBreakpoint.h b/lldb/source/Host/common/SoftwareBreakpoint.h new file mode 100644 index 0000000..1fed19e --- /dev/null +++ b/lldb/source/Host/common/SoftwareBreakpoint.h @@ -0,0 +1,51 @@ +//===-- SoftwareBreakpoint.h ------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_SoftwareBreakpoint_h_ +#define liblldb_SoftwareBreakpoint_h_ + +#include "lldb/lldb-private-forward.h" +#include "NativeBreakpoint.h" + +namespace lldb_private +{ + class SoftwareBreakpoint : public NativeBreakpoint + { + public: + static Error + CreateSoftwareBreakpoint (NativeProcessProtocol &process, lldb::addr_t addr, size_t size_hint, NativeBreakpointSP &breakpoint_spn); + + SoftwareBreakpoint (NativeProcessProtocol &process, lldb::addr_t addr, const uint8_t *saved_opcodes, const uint8_t *trap_opcodes, size_t opcode_size); + + protected: + Error + DoEnable () override; + + Error + DoDisable () override; + + bool + IsSoftwareBreakpoint () const override; + + private: + /// Max number of bytes that a software trap opcode sequence can occupy. + static const size_t MAX_TRAP_OPCODE_SIZE = 8; + + NativeProcessProtocol &m_process; + uint8_t m_saved_opcodes [MAX_TRAP_OPCODE_SIZE]; + uint8_t m_trap_opcodes [MAX_TRAP_OPCODE_SIZE]; + const size_t m_opcode_size; + + static Error + EnableSoftwareBreakpoint (NativeProcessProtocol &process, lldb::addr_t addr, size_t bp_opcode_size, const uint8_t *bp_opcode_bytes, uint8_t *saved_opcode_bytes); + + }; +} + +#endif // #ifndef liblldb_SoftwareBreakpoint_h_ diff --git a/lldb/source/Host/linux/Host.cpp b/lldb/source/Host/linux/Host.cpp index b30e6d5..0469695 100644 --- a/lldb/source/Host/linux/Host.cpp +++ b/lldb/source/Host/linux/Host.cpp @@ -175,6 +175,12 @@ Host::GetAuxvData(lldb_private::Process *process) return ProcFileReader::ReadIntoDataBuffer (process->GetID(), "auxv"); } +lldb::DataBufferSP +Host::GetAuxvData (lldb::pid_t pid) +{ + return ProcFileReader::ReadIntoDataBuffer (pid, "auxv"); +} + static bool IsDirNumeric(const char *dname) { diff --git a/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/AuxVector.cpp b/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/AuxVector.cpp index c079d0f..04a6792 100644 --- a/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/AuxVector.cpp +++ b/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/AuxVector.cpp @@ -57,11 +57,10 @@ ParseAuxvEntry(DataExtractor &data, DataBufferSP AuxVector::GetAuxvData() { -#if defined(__linux__) || defined(__FreeBSD__) - if (m_process->GetPluginName() == ProcessElfCore::GetPluginNameStatic()) - return static_cast(m_process)->GetAuxvData(); -#endif - return lldb_private::Host::GetAuxvData(m_process); + if (m_process) + return m_process->GetAuxvData (); + else + return DataBufferSP (); } void diff --git a/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.cpp b/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.cpp index 3c5dcc5..0e203fe 100644 --- a/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.cpp +++ b/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.cpp @@ -14,6 +14,7 @@ #include "lldb/Core/Error.h" #include "lldb/Core/Log.h" #include "lldb/Core/Module.h" +#include "lldb/Symbol/ObjectFile.h" #include "lldb/Symbol/Symbol.h" #include "lldb/Target/Process.h" #include "lldb/Target/Target.h" @@ -28,21 +29,61 @@ using namespace lldb_private; static addr_t ResolveRendezvousAddress(Process *process) { + Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); addr_t info_location; addr_t info_addr; Error error; + // Try to get it from our process. This might be a remote process and might + // grab it via some remote-specific mechanism. info_location = process->GetImageInfoAddress(); + if (log) + log->Printf ("%s info_location = 0x%" PRIx64, __FUNCTION__, info_location); + // If the process fails to return an address, fall back to seeing if the local object file can help us find it. if (info_location == LLDB_INVALID_ADDRESS) + { + Target *target = process ? &process->GetTarget() : nullptr; + if (target) + { + ObjectFile *obj_file = target->GetExecutableModule()->GetObjectFile(); + Address addr = obj_file->GetImageInfoAddress(target); + + if (addr.IsValid()) + { + info_location = addr.GetLoadAddress(target); + if (log) + log->Printf ("%s resolved via direct object file approach to 0x%" PRIx64, __FUNCTION__, info_location); + } + else + { + if (log) + log->Printf ("%s FAILED - direct object file approach did not yield a valid address", __FUNCTION__); + } + } + } + + if (info_location == LLDB_INVALID_ADDRESS) + { + if (log) + log->Printf ("%s FAILED - invalid info address", __FUNCTION__); return LLDB_INVALID_ADDRESS; + } info_addr = process->ReadPointerFromMemory(info_location, error); if (error.Fail()) + { + if (log) + log->Printf ("%s FAILED - could not read from the info location: %s", __FUNCTION__, error.AsCString ()); return LLDB_INVALID_ADDRESS; + } if (info_addr == 0) + { + if (log) + log->Printf ("%s FAILED - the rendezvous address contained at 0x%" PRIx64 " returned a null value", __FUNCTION__, info_location); return LLDB_INVALID_ADDRESS; + } return info_addr; } @@ -56,6 +97,8 @@ DYLDRendezvous::DYLDRendezvous(Process *process) m_added_soentries(), m_removed_soentries() { + Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); + m_thread_info.valid = false; // Cache a copy of the executable path @@ -63,13 +106,24 @@ DYLDRendezvous::DYLDRendezvous(Process *process) { Module *exe_mod = m_process->GetTarget().GetExecutableModulePointer(); if (exe_mod) + { exe_mod->GetFileSpec().GetPath(m_exe_path, PATH_MAX); + if (log) + log->Printf ("DYLDRendezvous::%s exe module executable path set: '%s'", __FUNCTION__, m_exe_path); + } + else + { + if (log) + log->Printf ("DYLDRendezvous::%s cannot cache exe module path: null executable module pointer", __FUNCTION__); + } } } bool DYLDRendezvous::Resolve() { + Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); + const size_t word_size = 4; Rendezvous info; size_t address_size; @@ -79,12 +133,16 @@ DYLDRendezvous::Resolve() address_size = m_process->GetAddressByteSize(); padding = address_size - word_size; + if (log) + log->Printf ("DYLDRendezvous::%s address size: %zu, padding %zu", __FUNCTION__, address_size, padding); if (m_rendezvous_addr == LLDB_INVALID_ADDRESS) cursor = info_addr = ResolveRendezvousAddress(m_process); else cursor = info_addr = m_rendezvous_addr; - + if (log) + log->Printf ("DYLDRendezvous::%s cursor = 0x%" PRIx64, __FUNCTION__, cursor); + if (cursor == LLDB_INVALID_ADDRESS) return false; diff --git a/lldb/source/Plugins/Platform/Linux/PlatformLinux.cpp b/lldb/source/Plugins/Platform/Linux/PlatformLinux.cpp index 47617a4..18d8e7c 100644 --- a/lldb/source/Plugins/Platform/Linux/PlatformLinux.cpp +++ b/lldb/source/Plugins/Platform/Linux/PlatformLinux.cpp @@ -33,6 +33,10 @@ #include "lldb/Target/Target.h" #include "lldb/Target/Process.h" +#if defined(__linux__) +#include "../../Process/Linux/NativeProcessLinux.h" +#endif + using namespace lldb; using namespace lldb_private; @@ -487,3 +491,58 @@ PlatformLinux::CalculateTrapHandlerSymbolNames () { m_trap_handlers.push_back (ConstString ("_sigtramp")); } + +Error +PlatformLinux::LaunchNativeProcess ( + ProcessLaunchInfo &launch_info, + lldb_private::NativeProcessProtocol::NativeDelegate &native_delegate, + NativeProcessProtocolSP &process_sp) +{ +#if !defined(__linux__) + return Error("only implemented on Linux hosts"); +#else + if (!IsHost ()) + return Error("PlatformLinux::%s (): cannot launch a debug process when not the host", __FUNCTION__); + + // Retrieve the exe module. + lldb::ModuleSP exe_module_sp; + + Error error = ResolveExecutable ( + launch_info.GetExecutableFile (), + launch_info.GetArchitecture (), + exe_module_sp, + NULL); + + if (!error.Success ()) + return error; + + if (!exe_module_sp) + return Error("exe_module_sp could not be resolved for %s", launch_info.GetExecutableFile ().GetPath ().c_str ()); + + // Launch it for debugging + error = NativeProcessLinux::LaunchProcess ( + exe_module_sp.get (), + launch_info, + native_delegate, + process_sp); + + return error; +#endif +} + +Error +PlatformLinux::AttachNativeProcess (lldb::pid_t pid, + lldb_private::NativeProcessProtocol::NativeDelegate &native_delegate, + NativeProcessProtocolSP &process_sp) +{ +#if !defined(__linux__) + return Error("only implemented on Linux hosts"); +#else + if (!IsHost ()) + return Error("PlatformLinux::%s (): cannot attach to a debug process when not the host", __FUNCTION__); + + // Launch it for debugging + return NativeProcessLinux::AttachToProcess (pid, native_delegate, process_sp); +#endif +} + diff --git a/lldb/source/Plugins/Platform/Linux/PlatformLinux.h b/lldb/source/Plugins/Platform/Linux/PlatformLinux.h index ca2aace..39b2c6bf 100644 --- a/lldb/source/Plugins/Platform/Linux/PlatformLinux.h +++ b/lldb/source/Plugins/Platform/Linux/PlatformLinux.h @@ -103,9 +103,20 @@ namespace lldb_private { virtual void CalculateTrapHandlerSymbolNames (); + Error + LaunchNativeProcess ( + ProcessLaunchInfo &launch_info, + lldb_private::NativeProcessProtocol::NativeDelegate &native_delegate, + NativeProcessProtocolSP &process_sp) override; + + Error + AttachNativeProcess (lldb::pid_t pid, + lldb_private::NativeProcessProtocol::NativeDelegate &native_delegate, + NativeProcessProtocolSP &process_sp) override; + protected: lldb::PlatformSP m_remote_platform_sp; // Allow multiple ways to connect to a remote darwin OS - + private: DISALLOW_COPY_AND_ASSIGN (PlatformLinux); }; diff --git a/lldb/source/Plugins/Process/Linux/CMakeLists.txt b/lldb/source/Plugins/Process/Linux/CMakeLists.txt index 46fbaa0..3f15e19 100644 --- a/lldb/source/Plugins/Process/Linux/CMakeLists.txt +++ b/lldb/source/Plugins/Process/Linux/CMakeLists.txt @@ -5,10 +5,11 @@ include_directories(../POSIX) include_directories(../Utility) add_lldb_library(lldbPluginProcessLinux + NativeProcessLinux.cpp + NativeThreadLinux.cpp ProcessLinux.cpp ProcessMonitor.cpp ProcFileReader.cpp - LinuxSignals.cpp LinuxThread.cpp ) diff --git a/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp b/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp new file mode 100644 index 0000000..ea245f7 --- /dev/null +++ b/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp @@ -0,0 +1,3465 @@ +//===-- NativeProcessLinux.cpp -------------------------------- -*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "lldb/lldb-python.h" + +#include "NativeProcessLinux.h" + +// C Includes +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +// C++ Includes +#include +#include + +// Other libraries and framework includes +#include "lldb/Core/Debugger.h" +#include "lldb/Core/Error.h" +#include "lldb/Core/Module.h" +#include "lldb/Core/RegisterValue.h" +#include "lldb/Core/Scalar.h" +#include "lldb/Core/State.h" +#include "lldb/Host/Host.h" +#include "lldb/Symbol/ObjectFile.h" +#include "lldb/Target/NativeRegisterContext.h" +#include "lldb/Target/ProcessLaunchInfo.h" +#include "lldb/Utility/PseudoTerminal.h" + +#include "Host/common/NativeBreakpoint.h" +#include "Utility/StringExtractor.h" + +#include "Plugins/Process/Utility/LinuxSignals.h" +#include "NativeThreadLinux.h" +#include "ProcFileReader.h" +#include "ProcessPOSIXLog.h" + +#define DEBUG_PTRACE_MAXBYTES 20 + +// Support ptrace extensions even when compiled without required kernel support +#ifndef PTRACE_GETREGS +#define PTRACE_GETREGS 12 +#endif +#ifndef PTRACE_SETREGS + #define PTRACE_SETREGS 13 +#endif +#ifndef PTRACE_GETREGSET + #define PTRACE_GETREGSET 0x4204 +#endif +#ifndef PTRACE_SETREGSET + #define PTRACE_SETREGSET 0x4205 +#endif +#ifndef PTRACE_GET_THREAD_AREA + #define PTRACE_GET_THREAD_AREA 25 +#endif +#ifndef PTRACE_ARCH_PRCTL + #define PTRACE_ARCH_PRCTL 30 +#endif +#ifndef ARCH_GET_FS + #define ARCH_SET_GS 0x1001 + #define ARCH_SET_FS 0x1002 + #define ARCH_GET_FS 0x1003 + #define ARCH_GET_GS 0x1004 +#endif + + +// Support hardware breakpoints in case it has not been defined +#ifndef TRAP_HWBKPT + #define TRAP_HWBKPT 4 +#endif + +// Try to define a macro to encapsulate the tgkill syscall +// fall back on kill() if tgkill isn't available +#define tgkill(pid, tid, sig) syscall(SYS_tgkill, pid, tid, sig) + +// We disable the tracing of ptrace calls for integration builds to +// avoid the additional indirection and checks. +#ifndef LLDB_CONFIGURATION_BUILDANDINTEGRATION +#define PTRACE(req, pid, addr, data, data_size) \ + PtraceWrapper((req), (pid), (addr), (data), (data_size), #req, __FILE__, __LINE__) +#else +#define PTRACE(req, pid, addr, data, data_size) \ + PtraceWrapper((req), (pid), (addr), (data), (data_size)) +#endif + +// Private bits we only need internally. +namespace +{ + using namespace lldb; + using namespace lldb_private; + + const UnixSignals& + GetUnixSignals () + { + static process_linux::LinuxSignals signals; + return signals; + } + + const char * + GetFilePath (const lldb_private::ProcessLaunchInfo::FileAction *file_action, const char *default_path) + { + const char *pts_name = "/dev/pts/"; + const char *path = NULL; + + if (file_action) + { + if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) + { + path = file_action->GetPath (); + // By default the stdio paths passed in will be pseudo-terminal + // (/dev/pts). If so, convert to using a different default path + // instead to redirect I/O to the debugger console. This should + // also handle user overrides to /dev/null or a different file. + if (!path || ::strncmp (path, pts_name, ::strlen (pts_name)) == 0) + path = default_path; + } + } + + return path; + } + + Error + ResolveProcessArchitecture (lldb::pid_t pid, Platform &platform, ArchSpec &arch) + { + // Grab process info for the running process. + ProcessInstanceInfo process_info; + if (!platform.GetProcessInfo (pid, process_info)) + return lldb_private::Error("failed to get process info"); + + // Resolve the executable module. + ModuleSP exe_module_sp; + FileSpecList executable_search_paths (Target::GetDefaultExecutableSearchPaths ()); + Error error = platform.ResolveExecutable( + process_info.GetExecutableFile (), + platform.GetSystemArchitecture (), + exe_module_sp, + executable_search_paths.GetSize () ? &executable_search_paths : NULL); + + if (!error.Success ()) + return error; + + // Check if we've got our architecture from the exe_module. + arch = exe_module_sp->GetArchitecture (); + if (arch.IsValid ()) + return Error(); + else + return Error("failed to retrieve a valid architecture from the exe module"); + } + + void + DisplayBytes (lldb_private::StreamString &s, void *bytes, uint32_t count) + { + uint8_t *ptr = (uint8_t *)bytes; + const uint32_t loop_count = std::min(DEBUG_PTRACE_MAXBYTES, count); + for(uint32_t i=0; iPrintf("PTRACE_POKETEXT %s", buf.GetData()); + break; + } + case PTRACE_POKEDATA: + { + DisplayBytes(buf, &data, 8); + verbose_log->Printf("PTRACE_POKEDATA %s", buf.GetData()); + break; + } + case PTRACE_POKEUSER: + { + DisplayBytes(buf, &data, 8); + verbose_log->Printf("PTRACE_POKEUSER %s", buf.GetData()); + break; + } + case PTRACE_SETREGS: + { + DisplayBytes(buf, data, data_size); + verbose_log->Printf("PTRACE_SETREGS %s", buf.GetData()); + break; + } + case PTRACE_SETFPREGS: + { + DisplayBytes(buf, data, data_size); + verbose_log->Printf("PTRACE_SETFPREGS %s", buf.GetData()); + break; + } + case PTRACE_SETSIGINFO: + { + DisplayBytes(buf, data, sizeof(siginfo_t)); + verbose_log->Printf("PTRACE_SETSIGINFO %s", buf.GetData()); + break; + } + case PTRACE_SETREGSET: + { + // Extract iov_base from data, which is a pointer to the struct IOVEC + DisplayBytes(buf, *(void **)data, data_size); + verbose_log->Printf("PTRACE_SETREGSET %s", buf.GetData()); + break; + } + default: + { + } + } + } + } + + // Wrapper for ptrace to catch errors and log calls. + // Note that ptrace sets errno on error because -1 can be a valid result (i.e. for PTRACE_PEEK*) + long + PtraceWrapper(int req, lldb::pid_t pid, void *addr, void *data, size_t data_size, + const char* reqName, const char* file, int line) + { + long int result; + + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_PTRACE)); + + PtraceDisplayBytes(req, data, data_size); + + errno = 0; + if (req == PTRACE_GETREGSET || req == PTRACE_SETREGSET) + result = ptrace(static_cast<__ptrace_request>(req), static_cast<::pid_t>(pid), *(unsigned int *)addr, data); + else + result = ptrace(static_cast<__ptrace_request>(req), static_cast<::pid_t>(pid), addr, data); + + if (log) + log->Printf("ptrace(%s, %" PRIu64 ", %p, %p, %zu)=%lX called from file %s line %d", + reqName, pid, addr, data, data_size, result, file, line); + + PtraceDisplayBytes(req, data, data_size); + + if (log && errno != 0) + { + const char* str; + switch (errno) + { + case ESRCH: str = "ESRCH"; break; + case EINVAL: str = "EINVAL"; break; + case EBUSY: str = "EBUSY"; break; + case EPERM: str = "EPERM"; break; + default: str = ""; + } + log->Printf("ptrace() failed; errno=%d (%s)", errno, str); + } + + return result; + } + +#ifdef LLDB_CONFIGURATION_BUILDANDINTEGRATION + // Wrapper for ptrace when logging is not required. + // Sets errno to 0 prior to calling ptrace. + long + PtraceWrapper(int req, lldb::pid_t pid, void *addr, void *data, size_t data_size) + { + long result = 0; + errno = 0; + if (req == PTRACE_GETREGSET || req == PTRACE_SETREGSET) + result = ptrace(static_cast<__ptrace_request>(req), static_cast<::pid_t>(pid), *(unsigned int *)addr, data); + else + result = ptrace(static_cast<__ptrace_request>(req), static_cast<::pid_t>(pid), addr, data); + return result; + } +#endif + + //------------------------------------------------------------------------------ + // Static implementations of NativeProcessLinux::ReadMemory and + // NativeProcessLinux::WriteMemory. This enables mutual recursion between these + // functions without needed to go thru the thread funnel. + + static lldb::addr_t + DoReadMemory ( + lldb::pid_t pid, + lldb::addr_t vm_addr, + void *buf, + lldb::addr_t size, + Error &error) + { + // ptrace word size is determined by the host, not the child + static const unsigned word_size = sizeof(void*); + unsigned char *dst = static_cast(buf); + lldb::addr_t bytes_read; + lldb::addr_t remainder; + long data; + + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_ALL)); + if (log) + ProcessPOSIXLog::IncNestLevel(); + if (log && ProcessPOSIXLog::AtTopNestLevel() && log->GetMask().Test(POSIX_LOG_MEMORY)) + log->Printf ("NativeProcessLinux::%s(%" PRIu64 ", %d, %p, %p, %zd, _)", __FUNCTION__, + pid, word_size, (void*)vm_addr, buf, size); + + assert(sizeof(data) >= word_size); + for (bytes_read = 0; bytes_read < size; bytes_read += remainder) + { + errno = 0; + data = PTRACE(PTRACE_PEEKDATA, pid, (void*)vm_addr, NULL, 0); + if (errno) + { + error.SetErrorToErrno(); + if (log) + ProcessPOSIXLog::DecNestLevel(); + return bytes_read; + } + + remainder = size - bytes_read; + remainder = remainder > word_size ? word_size : remainder; + + // Copy the data into our buffer + for (unsigned i = 0; i < remainder; ++i) + dst[i] = ((data >> i*8) & 0xFF); + + if (log && ProcessPOSIXLog::AtTopNestLevel() && + (log->GetMask().Test(POSIX_LOG_MEMORY_DATA_LONG) || + (log->GetMask().Test(POSIX_LOG_MEMORY_DATA_SHORT) && + size <= POSIX_LOG_MEMORY_SHORT_BYTES))) + { + uintptr_t print_dst = 0; + // Format bytes from data by moving into print_dst for log output + for (unsigned i = 0; i < remainder; ++i) + print_dst |= (((data >> i*8) & 0xFF) << i*8); + log->Printf ("NativeProcessLinux::%s() [%p]:0x%lx (0x%lx)", __FUNCTION__, + (void*)vm_addr, print_dst, (unsigned long)data); + } + + vm_addr += word_size; + dst += word_size; + } + + if (log) + ProcessPOSIXLog::DecNestLevel(); + return bytes_read; + } + + static lldb::addr_t + DoWriteMemory( + lldb::pid_t pid, + lldb::addr_t vm_addr, + const void *buf, + lldb::addr_t size, + Error &error) + { + // ptrace word size is determined by the host, not the child + static const unsigned word_size = sizeof(void*); + const unsigned char *src = static_cast(buf); + lldb::addr_t bytes_written = 0; + lldb::addr_t remainder; + + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_ALL)); + if (log) + ProcessPOSIXLog::IncNestLevel(); + if (log && ProcessPOSIXLog::AtTopNestLevel() && log->GetMask().Test(POSIX_LOG_MEMORY)) + log->Printf ("NativeProcessLinux::%s(%" PRIu64 ", %u, %p, %p, %" PRIu64 ")", __FUNCTION__, + pid, word_size, (void*)vm_addr, buf, size); + + for (bytes_written = 0; bytes_written < size; bytes_written += remainder) + { + remainder = size - bytes_written; + remainder = remainder > word_size ? word_size : remainder; + + if (remainder == word_size) + { + unsigned long data = 0; + assert(sizeof(data) >= word_size); + for (unsigned i = 0; i < word_size; ++i) + data |= (unsigned long)src[i] << i*8; + + if (log && ProcessPOSIXLog::AtTopNestLevel() && + (log->GetMask().Test(POSIX_LOG_MEMORY_DATA_LONG) || + (log->GetMask().Test(POSIX_LOG_MEMORY_DATA_SHORT) && + size <= POSIX_LOG_MEMORY_SHORT_BYTES))) + log->Printf ("NativeProcessLinux::%s() [%p]:0x%lx (0x%lx)", __FUNCTION__, + (void*)vm_addr, *(unsigned long*)src, data); + + if (PTRACE(PTRACE_POKEDATA, pid, (void*)vm_addr, (void*)data, 0)) + { + error.SetErrorToErrno(); + if (log) + ProcessPOSIXLog::DecNestLevel(); + return bytes_written; + } + } + else + { + unsigned char buff[8]; + if (DoReadMemory(pid, vm_addr, + buff, word_size, error) != word_size) + { + if (log) + ProcessPOSIXLog::DecNestLevel(); + return bytes_written; + } + + memcpy(buff, src, remainder); + + if (DoWriteMemory(pid, vm_addr, + buff, word_size, error) != word_size) + { + if (log) + ProcessPOSIXLog::DecNestLevel(); + return bytes_written; + } + + if (log && ProcessPOSIXLog::AtTopNestLevel() && + (log->GetMask().Test(POSIX_LOG_MEMORY_DATA_LONG) || + (log->GetMask().Test(POSIX_LOG_MEMORY_DATA_SHORT) && + size <= POSIX_LOG_MEMORY_SHORT_BYTES))) + log->Printf ("NativeProcessLinux::%s() [%p]:0x%lx (0x%lx)", __FUNCTION__, + (void*)vm_addr, *(unsigned long*)src, *(unsigned long*)buff); + } + + vm_addr += word_size; + src += word_size; + } + if (log) + ProcessPOSIXLog::DecNestLevel(); + return bytes_written; + } + + //------------------------------------------------------------------------------ + /// @class Operation + /// @brief Represents a NativeProcessLinux operation. + /// + /// Under Linux, it is not possible to ptrace() from any other thread but the + /// one that spawned or attached to the process from the start. Therefore, when + /// a NativeProcessLinux is asked to deliver or change the state of an inferior + /// process the operation must be "funneled" to a specific thread to perform the + /// task. The Operation class provides an abstract base for all services the + /// NativeProcessLinux must perform via the single virtual function Execute, thus + /// encapsulating the code that needs to run in the privileged context. + class Operation + { + public: + Operation () : m_error() { } + + virtual + ~Operation() {} + + virtual void + Execute (NativeProcessLinux *process) = 0; + + const Error & + GetError () const { return m_error; } + + protected: + Error m_error; + }; + + //------------------------------------------------------------------------------ + /// @class ReadOperation + /// @brief Implements NativeProcessLinux::ReadMemory. + class ReadOperation : public Operation + { + public: + ReadOperation ( + lldb::addr_t addr, + void *buff, + lldb::addr_t size, + size_t &result) : + Operation (), + m_addr (addr), + m_buff (buff), + m_size (size), + m_result (result) + { + } + + void Execute (NativeProcessLinux *process) override; + + private: + lldb::addr_t m_addr; + void *m_buff; + lldb::addr_t m_size; + lldb::addr_t &m_result; + }; + + void + ReadOperation::Execute (NativeProcessLinux *process) + { + m_result = DoReadMemory (process->GetID (), m_addr, m_buff, m_size, m_error); + } + + //------------------------------------------------------------------------------ + /// @class WriteOperation + /// @brief Implements NativeProcessLinux::WriteMemory. + class WriteOperation : public Operation + { + public: + WriteOperation ( + lldb::addr_t addr, + const void *buff, + lldb::addr_t size, + lldb::addr_t &result) : + Operation (), + m_addr (addr), + m_buff (buff), + m_size (size), + m_result (result) + { + } + + void Execute (NativeProcessLinux *process) override; + + private: + lldb::addr_t m_addr; + const void *m_buff; + lldb::addr_t m_size; + lldb::addr_t &m_result; + }; + + void + WriteOperation::Execute(NativeProcessLinux *process) + { + m_result = DoWriteMemory (process->GetID (), m_addr, m_buff, m_size, m_error); + } + + //------------------------------------------------------------------------------ + /// @class ReadRegOperation + /// @brief Implements NativeProcessLinux::ReadRegisterValue. + class ReadRegOperation : public Operation + { + public: + ReadRegOperation(lldb::tid_t tid, uint32_t offset, const char *reg_name, + RegisterValue &value, bool &result) + : m_tid(tid), m_offset(static_cast (offset)), m_reg_name(reg_name), + m_value(value), m_result(result) + { } + + void Execute(NativeProcessLinux *monitor); + + private: + lldb::tid_t m_tid; + uintptr_t m_offset; + const char *m_reg_name; + RegisterValue &m_value; + bool &m_result; + }; + + void + ReadRegOperation::Execute(NativeProcessLinux *monitor) + { + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_REGISTERS)); + + // Set errno to zero so that we can detect a failed peek. + errno = 0; + lldb::addr_t data = PTRACE(PTRACE_PEEKUSER, m_tid, (void*)m_offset, NULL, 0); + if (errno) + m_result = false; + else + { + m_value = data; + m_result = true; + } + if (log) + log->Printf ("NativeProcessLinux::%s() reg %s: 0x%" PRIx64, __FUNCTION__, + m_reg_name, data); + } + + //------------------------------------------------------------------------------ + /// @class WriteRegOperation + /// @brief Implements NativeProcessLinux::WriteRegisterValue. + class WriteRegOperation : public Operation + { + public: + WriteRegOperation(lldb::tid_t tid, unsigned offset, const char *reg_name, + const RegisterValue &value, bool &result) + : m_tid(tid), m_offset(offset), m_reg_name(reg_name), + m_value(value), m_result(result) + { } + + void Execute(NativeProcessLinux *monitor); + + private: + lldb::tid_t m_tid; + uintptr_t m_offset; + const char *m_reg_name; + const RegisterValue &m_value; + bool &m_result; + }; + + void + WriteRegOperation::Execute(NativeProcessLinux *monitor) + { + void* buf; + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_REGISTERS)); + + buf = (void*) m_value.GetAsUInt64(); + + if (log) + log->Printf ("NativeProcessLinux::%s() reg %s: %p", __FUNCTION__, m_reg_name, buf); + if (PTRACE(PTRACE_POKEUSER, m_tid, (void*)m_offset, buf, 0)) + m_result = false; + else + m_result = true; + } + + //------------------------------------------------------------------------------ + /// @class ReadGPROperation + /// @brief Implements NativeProcessLinux::ReadGPR. + class ReadGPROperation : public Operation + { + public: + ReadGPROperation(lldb::tid_t tid, void *buf, size_t buf_size, bool &result) + : m_tid(tid), m_buf(buf), m_buf_size(buf_size), m_result(result) + { } + + void Execute(NativeProcessLinux *monitor); + + private: + lldb::tid_t m_tid; + void *m_buf; + size_t m_buf_size; + bool &m_result; + }; + + void + ReadGPROperation::Execute(NativeProcessLinux *monitor) + { + if (PTRACE(PTRACE_GETREGS, m_tid, NULL, m_buf, m_buf_size) < 0) + m_result = false; + else + m_result = true; + } + + //------------------------------------------------------------------------------ + /// @class ReadFPROperation + /// @brief Implements NativeProcessLinux::ReadFPR. + class ReadFPROperation : public Operation + { + public: + ReadFPROperation(lldb::tid_t tid, void *buf, size_t buf_size, bool &result) + : m_tid(tid), m_buf(buf), m_buf_size(buf_size), m_result(result) + { } + + void Execute(NativeProcessLinux *monitor); + + private: + lldb::tid_t m_tid; + void *m_buf; + size_t m_buf_size; + bool &m_result; + }; + + void + ReadFPROperation::Execute(NativeProcessLinux *monitor) + { + if (PTRACE(PTRACE_GETFPREGS, m_tid, NULL, m_buf, m_buf_size) < 0) + m_result = false; + else + m_result = true; + } + + //------------------------------------------------------------------------------ + /// @class ReadRegisterSetOperation + /// @brief Implements NativeProcessLinux::ReadRegisterSet. + class ReadRegisterSetOperation : public Operation + { + public: + ReadRegisterSetOperation(lldb::tid_t tid, void *buf, size_t buf_size, unsigned int regset, bool &result) + : m_tid(tid), m_buf(buf), m_buf_size(buf_size), m_regset(regset), m_result(result) + { } + + void Execute(NativeProcessLinux *monitor); + + private: + lldb::tid_t m_tid; + void *m_buf; + size_t m_buf_size; + const unsigned int m_regset; + bool &m_result; + }; + + void + ReadRegisterSetOperation::Execute(NativeProcessLinux *monitor) + { + if (PTRACE(PTRACE_GETREGSET, m_tid, (void *)&m_regset, m_buf, m_buf_size) < 0) + m_result = false; + else + m_result = true; + } + + //------------------------------------------------------------------------------ + /// @class WriteGPROperation + /// @brief Implements NativeProcessLinux::WriteGPR. + class WriteGPROperation : public Operation + { + public: + WriteGPROperation(lldb::tid_t tid, void *buf, size_t buf_size, bool &result) + : m_tid(tid), m_buf(buf), m_buf_size(buf_size), m_result(result) + { } + + void Execute(NativeProcessLinux *monitor); + + private: + lldb::tid_t m_tid; + void *m_buf; + size_t m_buf_size; + bool &m_result; + }; + + void + WriteGPROperation::Execute(NativeProcessLinux *monitor) + { + if (PTRACE(PTRACE_SETREGS, m_tid, NULL, m_buf, m_buf_size) < 0) + m_result = false; + else + m_result = true; + } + + //------------------------------------------------------------------------------ + /// @class WriteFPROperation + /// @brief Implements NativeProcessLinux::WriteFPR. + class WriteFPROperation : public Operation + { + public: + WriteFPROperation(lldb::tid_t tid, void *buf, size_t buf_size, bool &result) + : m_tid(tid), m_buf(buf), m_buf_size(buf_size), m_result(result) + { } + + void Execute(NativeProcessLinux *monitor); + + private: + lldb::tid_t m_tid; + void *m_buf; + size_t m_buf_size; + bool &m_result; + }; + + void + WriteFPROperation::Execute(NativeProcessLinux *monitor) + { + if (PTRACE(PTRACE_SETFPREGS, m_tid, NULL, m_buf, m_buf_size) < 0) + m_result = false; + else + m_result = true; + } + + //------------------------------------------------------------------------------ + /// @class WriteRegisterSetOperation + /// @brief Implements NativeProcessLinux::WriteRegisterSet. + class WriteRegisterSetOperation : public Operation + { + public: + WriteRegisterSetOperation(lldb::tid_t tid, void *buf, size_t buf_size, unsigned int regset, bool &result) + : m_tid(tid), m_buf(buf), m_buf_size(buf_size), m_regset(regset), m_result(result) + { } + + void Execute(NativeProcessLinux *monitor); + + private: + lldb::tid_t m_tid; + void *m_buf; + size_t m_buf_size; + const unsigned int m_regset; + bool &m_result; + }; + + void + WriteRegisterSetOperation::Execute(NativeProcessLinux *monitor) + { + if (PTRACE(PTRACE_SETREGSET, m_tid, (void *)&m_regset, m_buf, m_buf_size) < 0) + m_result = false; + else + m_result = true; + } + + //------------------------------------------------------------------------------ + /// @class ResumeOperation + /// @brief Implements NativeProcessLinux::Resume. + class ResumeOperation : public Operation + { + public: + ResumeOperation(lldb::tid_t tid, uint32_t signo, bool &result) : + m_tid(tid), m_signo(signo), m_result(result) { } + + void Execute(NativeProcessLinux *monitor); + + private: + lldb::tid_t m_tid; + uint32_t m_signo; + bool &m_result; + }; + + void + ResumeOperation::Execute(NativeProcessLinux *monitor) + { + intptr_t data = 0; + + if (m_signo != LLDB_INVALID_SIGNAL_NUMBER) + data = m_signo; + + if (PTRACE(PTRACE_CONT, m_tid, NULL, (void*)data, 0)) + { + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + + if (log) + log->Printf ("ResumeOperation (%" PRIu64 ") failed: %s", m_tid, strerror(errno)); + m_result = false; + } + else + m_result = true; + } + + //------------------------------------------------------------------------------ + /// @class SingleStepOperation + /// @brief Implements NativeProcessLinux::SingleStep. + class SingleStepOperation : public Operation + { + public: + SingleStepOperation(lldb::tid_t tid, uint32_t signo, bool &result) + : m_tid(tid), m_signo(signo), m_result(result) { } + + void Execute(NativeProcessLinux *monitor); + + private: + lldb::tid_t m_tid; + uint32_t m_signo; + bool &m_result; + }; + + void + SingleStepOperation::Execute(NativeProcessLinux *monitor) + { + intptr_t data = 0; + + if (m_signo != LLDB_INVALID_SIGNAL_NUMBER) + data = m_signo; + + if (PTRACE(PTRACE_SINGLESTEP, m_tid, NULL, (void*)data, 0)) + m_result = false; + else + m_result = true; + } + + //------------------------------------------------------------------------------ + /// @class SiginfoOperation + /// @brief Implements NativeProcessLinux::GetSignalInfo. + class SiginfoOperation : public Operation + { + public: + SiginfoOperation(lldb::tid_t tid, void *info, bool &result, int &ptrace_err) + : m_tid(tid), m_info(info), m_result(result), m_err(ptrace_err) { } + + void Execute(NativeProcessLinux *monitor); + + private: + lldb::tid_t m_tid; + void *m_info; + bool &m_result; + int &m_err; + }; + + void + SiginfoOperation::Execute(NativeProcessLinux *monitor) + { + if (PTRACE(PTRACE_GETSIGINFO, m_tid, NULL, m_info, 0)) { + m_result = false; + m_err = errno; + } + else + m_result = true; + } + + //------------------------------------------------------------------------------ + /// @class EventMessageOperation + /// @brief Implements NativeProcessLinux::GetEventMessage. + class EventMessageOperation : public Operation + { + public: + EventMessageOperation(lldb::tid_t tid, unsigned long *message, bool &result) + : m_tid(tid), m_message(message), m_result(result) { } + + void Execute(NativeProcessLinux *monitor); + + private: + lldb::tid_t m_tid; + unsigned long *m_message; + bool &m_result; + }; + + void + EventMessageOperation::Execute(NativeProcessLinux *monitor) + { + if (PTRACE(PTRACE_GETEVENTMSG, m_tid, NULL, m_message, 0)) + m_result = false; + else + m_result = true; + } + + class DetachOperation : public Operation + { + public: + DetachOperation(lldb::tid_t tid, Error &result) : m_tid(tid), m_error(result) { } + + void Execute(NativeProcessLinux *monitor); + + private: + lldb::tid_t m_tid; + Error &m_error; + }; + + void + DetachOperation::Execute(NativeProcessLinux *monitor) + { + if (ptrace(PT_DETACH, m_tid, NULL, 0) < 0) + m_error.SetErrorToErrno(); + } + +} + +using namespace lldb_private; + +// Simple helper function to ensure flags are enabled on the given file +// descriptor. +static bool +EnsureFDFlags(int fd, int flags, Error &error) +{ + int status; + + if ((status = fcntl(fd, F_GETFL)) == -1) + { + error.SetErrorToErrno(); + return false; + } + + if (fcntl(fd, F_SETFL, status | flags) == -1) + { + error.SetErrorToErrno(); + return false; + } + + return true; +} + +NativeProcessLinux::OperationArgs::OperationArgs(NativeProcessLinux *monitor) + : m_monitor(monitor) +{ + sem_init(&m_semaphore, 0, 0); +} + +NativeProcessLinux::OperationArgs::~OperationArgs() +{ + sem_destroy(&m_semaphore); +} + +NativeProcessLinux::LaunchArgs::LaunchArgs(NativeProcessLinux *monitor, + lldb_private::Module *module, + char const **argv, + char const **envp, + const char *stdin_path, + const char *stdout_path, + const char *stderr_path, + const char *working_dir) + : OperationArgs(monitor), + m_module(module), + m_argv(argv), + m_envp(envp), + m_stdin_path(stdin_path), + m_stdout_path(stdout_path), + m_stderr_path(stderr_path), + m_working_dir(working_dir) { } + +NativeProcessLinux::LaunchArgs::~LaunchArgs() +{ } + +NativeProcessLinux::AttachArgs::AttachArgs(NativeProcessLinux *monitor, + lldb::pid_t pid) + : OperationArgs(monitor), m_pid(pid) { } + +NativeProcessLinux::AttachArgs::~AttachArgs() +{ } + +// ----------------------------------------------------------------------------- +// Public Static Methods +// ----------------------------------------------------------------------------- + +lldb_private::Error +NativeProcessLinux::LaunchProcess ( + lldb_private::Module *exe_module, + lldb_private::ProcessLaunchInfo &launch_info, + lldb_private::NativeProcessProtocol::NativeDelegate &native_delegate, + NativeProcessProtocolSP &native_process_sp) +{ + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + + Error error; + + // Verify the working directory is valid if one was specified. + const char* working_dir = launch_info.GetWorkingDirectory (); + if (working_dir) + { + FileSpec working_dir_fs (working_dir, true); + if (!working_dir_fs || working_dir_fs.GetFileType () != FileSpec::eFileTypeDirectory) + { + error.SetErrorStringWithFormat ("No such file or directory: %s", working_dir); + return error; + } + } + + const lldb_private::ProcessLaunchInfo::FileAction *file_action; + + // Default of NULL will mean to use existing open file descriptors. + const char *stdin_path = NULL; + const char *stdout_path = NULL; + const char *stderr_path = NULL; + + file_action = launch_info.GetFileActionForFD (STDIN_FILENO); + stdin_path = GetFilePath (file_action, stdin_path); + + file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); + stdout_path = GetFilePath (file_action, stdout_path); + + file_action = launch_info.GetFileActionForFD (STDERR_FILENO); + stderr_path = GetFilePath (file_action, stderr_path); + + // Create the NativeProcessLinux in launch mode. + native_process_sp.reset (new NativeProcessLinux ()); + + if (log) + { + int i = 0; + for (const char **args = launch_info.GetArguments ().GetConstArgumentVector (); *args; ++args, ++i) + { + log->Printf ("NativeProcessLinux::%s arg %d: \"%s\"", __FUNCTION__, i, *args ? *args : "nullptr"); + ++i; + } + } + + if (!native_process_sp->RegisterNativeDelegate (native_delegate)) + { + native_process_sp.reset (); + error.SetErrorStringWithFormat ("failed to register the native delegate"); + return error; + } + + reinterpret_cast (native_process_sp.get ())->LaunchInferior ( + exe_module, + launch_info.GetArguments ().GetConstArgumentVector (), + launch_info.GetEnvironmentEntries ().GetConstArgumentVector (), + stdin_path, + stdout_path, + stderr_path, + working_dir, + error); + + if (error.Fail ()) + { + native_process_sp.reset (); + if (log) + log->Printf ("NativeProcessLinux::%s failed to launch process: %s", __FUNCTION__, error.AsCString ()); + return error; + } + + launch_info.SetProcessID (native_process_sp->GetID ()); + + return error; +} + +lldb_private::Error +NativeProcessLinux::AttachToProcess ( + lldb::pid_t pid, + lldb_private::NativeProcessProtocol::NativeDelegate &native_delegate, + NativeProcessProtocolSP &native_process_sp) +{ + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + if (log && log->GetMask ().Test (POSIX_LOG_VERBOSE)) + log->Printf ("NativeProcessLinux::%s(pid = %" PRIi64 ")", __FUNCTION__, pid); + + // Grab the current platform architecture. This should be Linux, + // since this code is only intended to run on a Linux host. + PlatformSP platform_sp (Platform::GetDefaultPlatform ()); + if (!platform_sp) + return Error("failed to get a valid default platform"); + + // Retrieve the architecture for the running process. + ArchSpec process_arch; + Error error = ResolveProcessArchitecture (pid, *platform_sp.get (), process_arch); + if (!error.Success ()) + return error; + + native_process_sp.reset (new NativeProcessLinux ()); + + if (!native_process_sp->RegisterNativeDelegate (native_delegate)) + { + native_process_sp.reset (new NativeProcessLinux ()); + error.SetErrorStringWithFormat ("failed to register the native delegate"); + return error; + } + + reinterpret_cast (native_process_sp.get ())->AttachToInferior (pid, error); + if (!error.Success ()) + { + native_process_sp.reset (); + return error; + } + + return error; +} + +// ----------------------------------------------------------------------------- +// Public Instance Methods +// ----------------------------------------------------------------------------- + +NativeProcessLinux::NativeProcessLinux () : + NativeProcessProtocol (LLDB_INVALID_PROCESS_ID), + m_arch (), + m_operation_thread (LLDB_INVALID_HOST_THREAD), + m_monitor_thread (LLDB_INVALID_HOST_THREAD), + m_operation (nullptr), + m_operation_mutex (), + m_operation_pending (), + m_operation_done (), + m_wait_for_stop_tids (), + m_wait_for_stop_tids_mutex (), + m_supports_mem_region (eLazyBoolCalculate), + m_mem_region_cache (), + m_mem_region_cache_mutex () +{ +} + +//------------------------------------------------------------------------------ +/// The basic design of the NativeProcessLinux is built around two threads. +/// +/// One thread (@see SignalThread) simply blocks on a call to waitpid() looking +/// for changes in the debugee state. When a change is detected a +/// ProcessMessage is sent to the associated ProcessLinux instance. This thread +/// "drives" state changes in the debugger. +/// +/// The second thread (@see OperationThread) is responsible for two things 1) +/// launching or attaching to the inferior process, and then 2) servicing +/// operations such as register reads/writes, stepping, etc. See the comments +/// on the Operation class for more info as to why this is needed. +void +NativeProcessLinux::LaunchInferior ( + Module *module, + const char *argv[], + const char *envp[], + const char *stdin_path, + const char *stdout_path, + const char *stderr_path, + const char *working_dir, + lldb_private::Error &error) +{ + if (module) + m_arch = module->GetArchitecture (); + + SetState(eStateLaunching); + + std::unique_ptr args( + new LaunchArgs( + this, module, argv, envp, + stdin_path, stdout_path, stderr_path, + working_dir)); + + sem_init(&m_operation_pending, 0, 0); + sem_init(&m_operation_done, 0, 0); + + StartLaunchOpThread(args.get(), error); + if (!error.Success()) + return; + +WAIT_AGAIN: + // Wait for the operation thread to initialize. + if (sem_wait(&args->m_semaphore)) + { + if (errno == EINTR) + goto WAIT_AGAIN; + else + { + error.SetErrorToErrno(); + return; + } + } + + // Check that the launch was a success. + if (!args->m_error.Success()) + { + StopOpThread(); + error = args->m_error; + return; + } + + // Finally, start monitoring the child process for change in state. + m_monitor_thread = Host::StartMonitoringChildProcess( + NativeProcessLinux::MonitorCallback, this, GetID(), true); + if (!IS_VALID_LLDB_HOST_THREAD(m_monitor_thread)) + { + error.SetErrorToGenericError(); + error.SetErrorString ("Process attach failed to create monitor thread for NativeProcessLinux::MonitorCallback."); + return; + } +} + +void +NativeProcessLinux::AttachToInferior (lldb::pid_t pid, lldb_private::Error &error) +{ + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + if (log) + log->Printf ("NativeProcessLinux::%s (pid = %" PRIi64 ")", __FUNCTION__, pid); + + // We can use the Host for everything except the ResolveExecutable portion. + PlatformSP platform_sp = Platform::GetDefaultPlatform (); + if (!platform_sp) + { + if (log) + log->Printf ("NativeProcessLinux::%s (pid = %" PRIi64 "): no default platform set", __FUNCTION__, pid); + error.SetErrorString ("no default platform available"); + } + + // Gather info about the process. + ProcessInstanceInfo process_info; + platform_sp->GetProcessInfo (pid, process_info); + + // Resolve the executable module + ModuleSP exe_module_sp; + FileSpecList executable_search_paths (Target::GetDefaultExecutableSearchPaths()); + + error = platform_sp->ResolveExecutable(process_info.GetExecutableFile(), + Host::GetArchitecture(), + exe_module_sp, + executable_search_paths.GetSize() ? &executable_search_paths : NULL); + if (!error.Success()) + return; + + // Set the architecture to the exe architecture. + m_arch = exe_module_sp->GetArchitecture(); + if (log) + log->Printf ("NativeProcessLinux::%s (pid = %" PRIi64 ") detected architecture %s", __FUNCTION__, pid, m_arch.GetArchitectureName ()); + + m_pid = pid; + SetState(eStateAttaching); + + sem_init (&m_operation_pending, 0, 0); + sem_init (&m_operation_done, 0, 0); + + std::unique_ptr args (new AttachArgs (this, pid)); + + StartAttachOpThread(args.get (), error); + if (!error.Success ()) + return; + +WAIT_AGAIN: + // Wait for the operation thread to initialize. + if (sem_wait (&args->m_semaphore)) + { + if (errno == EINTR) + goto WAIT_AGAIN; + else + { + error.SetErrorToErrno (); + return; + } + } + + // Check that the attach was a success. + if (!args->m_error.Success ()) + { + StopOpThread (); + error = args->m_error; + return; + } + + // Finally, start monitoring the child process for change in state. + m_monitor_thread = Host::StartMonitoringChildProcess ( + NativeProcessLinux::MonitorCallback, this, GetID (), true); + if (!IS_VALID_LLDB_HOST_THREAD (m_monitor_thread)) + { + error.SetErrorToGenericError (); + error.SetErrorString ("Process attach failed to create monitor thread for NativeProcessLinux::MonitorCallback."); + return; + } +} + +NativeProcessLinux::~NativeProcessLinux() +{ + StopMonitor(); +} + +//------------------------------------------------------------------------------ +// Thread setup and tear down. + +void +NativeProcessLinux::StartLaunchOpThread(LaunchArgs *args, Error &error) +{ + static const char *g_thread_name = "lldb.process.nativelinux.operation"; + + if (IS_VALID_LLDB_HOST_THREAD (m_operation_thread)) + return; + + m_operation_thread = + Host::ThreadCreate (g_thread_name, LaunchOpThread, args, &error); +} + +void * +NativeProcessLinux::LaunchOpThread(void *arg) +{ + LaunchArgs *args = static_cast(arg); + + if (!Launch(args)) { + sem_post(&args->m_semaphore); + return NULL; + } + + ServeOperation(args); + return NULL; +} + +bool +NativeProcessLinux::Launch(LaunchArgs *args) +{ + NativeProcessLinux *monitor = args->m_monitor; + assert (monitor && "monitor is NULL"); + if (!monitor) + return false; + + const char **argv = args->m_argv; + const char **envp = args->m_envp; + const char *stdin_path = args->m_stdin_path; + const char *stdout_path = args->m_stdout_path; + const char *stderr_path = args->m_stderr_path; + const char *working_dir = args->m_working_dir; + + lldb_utility::PseudoTerminal terminal; + const size_t err_len = 1024; + char err_str[err_len]; + lldb::pid_t pid; + NativeThreadProtocolSP thread_sp; + + lldb::ThreadSP inferior; + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + + // Propagate the environment if one is not supplied. + if (envp == NULL || envp[0] == NULL) + envp = const_cast(environ); + + if ((pid = terminal.Fork(err_str, err_len)) == static_cast (-1)) + { + args->m_error.SetErrorToGenericError(); + args->m_error.SetErrorString("Process fork failed."); + goto FINISH; + } + + // Recognized child exit status codes. + enum { + ePtraceFailed = 1, + eDupStdinFailed, + eDupStdoutFailed, + eDupStderrFailed, + eChdirFailed, + eExecFailed, + eSetGidFailed + }; + + // Child process. + if (pid == 0) + { + if (log) + log->Printf ("NativeProcessLinux::%s inferior process preparing to fork", __FUNCTION__); + + // Trace this process. + if (log) + log->Printf ("NativeProcessLinux::%s inferior process issuing PTRACE_TRACEME", __FUNCTION__); + + if (PTRACE(PTRACE_TRACEME, 0, NULL, NULL, 0) < 0) + { + if (log) + log->Printf ("NativeProcessLinux::%s inferior process PTRACE_TRACEME failed", __FUNCTION__); + exit(ePtraceFailed); + } + + // Do not inherit setgid powers. + if (log) + log->Printf ("NativeProcessLinux::%s inferior process resetting gid", __FUNCTION__); + + if (setgid(getgid()) != 0) + { + if (log) + log->Printf ("NativeProcessLinux::%s inferior process setgid() failed", __FUNCTION__); + exit(eSetGidFailed); + } + + // Attempt to have our own process group. + // TODO verify if we really want this. + if (log) + log->Printf ("NativeProcessLinux::%s inferior process resetting process group", __FUNCTION__); + + if (setpgid(0, 0) != 0) + { + if (log) + { + const int error_code = errno; + log->Printf ("NativeProcessLinux::%s inferior setpgid() failed, errno=%d (%s), continuing with existing proccess group %" PRIu64, + __FUNCTION__, + error_code, + strerror (error_code), + static_cast (getpgid (0))); + } + // Don't allow this to prevent an inferior exec. + } + + // Dup file descriptors if needed. + // + // FIXME: If two or more of the paths are the same we needlessly open + // the same file multiple times. + if (stdin_path != NULL && stdin_path[0]) + if (!DupDescriptor(stdin_path, STDIN_FILENO, O_RDONLY)) + exit(eDupStdinFailed); + + if (stdout_path != NULL && stdout_path[0]) + if (!DupDescriptor(stdout_path, STDOUT_FILENO, O_WRONLY | O_CREAT)) + exit(eDupStdoutFailed); + + if (stderr_path != NULL && stderr_path[0]) + if (!DupDescriptor(stderr_path, STDERR_FILENO, O_WRONLY | O_CREAT)) + exit(eDupStderrFailed); + + // Change working directory + if (working_dir != NULL && working_dir[0]) + if (0 != ::chdir(working_dir)) + exit(eChdirFailed); + + // Execute. We should never return. + execve(argv[0], + const_cast(argv), + const_cast(envp)); + exit(eExecFailed); + } + + // Wait for the child process to trap on its call to execve. + ::pid_t wpid; + int status; + if ((wpid = waitpid(pid, &status, 0)) < 0) + { + args->m_error.SetErrorToErrno(); + + if (log) + log->Printf ("NativeProcessLinux::%s waitpid for inferior failed with %s", __FUNCTION__, args->m_error.AsCString ()); + + // Mark the inferior as invalid. + // FIXME this could really use a new state - eStateLaunchFailure. For now, using eStateInvalid. + monitor->SetState (StateType::eStateInvalid); + + goto FINISH; + } + else if (WIFEXITED(status)) + { + // open, dup or execve likely failed for some reason. + args->m_error.SetErrorToGenericError(); + switch (WEXITSTATUS(status)) + { + case ePtraceFailed: + args->m_error.SetErrorString("Child ptrace failed."); + break; + case eDupStdinFailed: + args->m_error.SetErrorString("Child open stdin failed."); + break; + case eDupStdoutFailed: + args->m_error.SetErrorString("Child open stdout failed."); + break; + case eDupStderrFailed: + args->m_error.SetErrorString("Child open stderr failed."); + break; + case eChdirFailed: + args->m_error.SetErrorString("Child failed to set working directory."); + break; + case eExecFailed: + args->m_error.SetErrorString("Child exec failed."); + break; + case eSetGidFailed: + args->m_error.SetErrorString("Child setgid failed."); + break; + default: + args->m_error.SetErrorString("Child returned unknown exit status."); + break; + } + + if (log) + { + log->Printf ("NativeProcessLinux::%s inferior exited with status %d before issuing a STOP", + __FUNCTION__, + WEXITSTATUS(status)); + } + + // Mark the inferior as invalid. + // FIXME this could really use a new state - eStateLaunchFailure. For now, using eStateInvalid. + monitor->SetState (StateType::eStateInvalid); + + goto FINISH; + } + assert(WIFSTOPPED(status) && (wpid == static_cast<::pid_t> (pid)) && + "Could not sync with inferior process."); + + if (log) + log->Printf ("NativeProcessLinux::%s inferior started, now in stopped state", __FUNCTION__); + + if (!SetDefaultPtraceOpts(pid)) + { + args->m_error.SetErrorToErrno(); + if (log) + log->Printf ("NativeProcessLinux::%s inferior failed to set default ptrace options: %s", + __FUNCTION__, + args->m_error.AsCString ()); + + // Mark the inferior as invalid. + // FIXME this could really use a new state - eStateLaunchFailure. For now, using eStateInvalid. + monitor->SetState (StateType::eStateInvalid); + + goto FINISH; + } + + // Release the master terminal descriptor and pass it off to the + // NativeProcessLinux instance. Similarly stash the inferior pid. + monitor->m_terminal_fd = terminal.ReleaseMasterFileDescriptor(); + monitor->m_pid = pid; + + // Set the terminal fd to be in non blocking mode (it simplifies the + // implementation of ProcessLinux::GetSTDOUT to have a non-blocking + // descriptor to read from). + if (!EnsureFDFlags(monitor->m_terminal_fd, O_NONBLOCK, args->m_error)) + { + if (log) + log->Printf ("NativeProcessLinux::%s inferior EnsureFDFlags failed for ensuring terminal O_NONBLOCK setting: %s", + __FUNCTION__, + args->m_error.AsCString ()); + + // Mark the inferior as invalid. + // FIXME this could really use a new state - eStateLaunchFailure. For now, using eStateInvalid. + monitor->SetState (StateType::eStateInvalid); + + goto FINISH; + } + + if (log) + log->Printf ("NativeProcessLinux::%s() adding pid = %" PRIu64, __FUNCTION__, pid); + + thread_sp = monitor->AddThread (static_cast (pid)); + assert (thread_sp && "AddThread() returned a nullptr thread"); + reinterpret_cast (thread_sp.get ())->SetStoppedBySignal (SIGSTOP); + monitor->SetCurrentThreadID (thread_sp->GetID ()); + + // Let our process instance know the thread has stopped. + monitor->SetState (StateType::eStateStopped); + +FINISH: + if (log) + { + if (args->m_error.Success ()) + { + log->Printf ("NativeProcessLinux::%s inferior launching succeeded", __FUNCTION__); + } + else + { + log->Printf ("NativeProcessLinux::%s inferior launching failed: %s", + __FUNCTION__, + args->m_error.AsCString ()); + } + } + return args->m_error.Success(); +} + +void +NativeProcessLinux::StartAttachOpThread(AttachArgs *args, lldb_private::Error &error) +{ + static const char *g_thread_name = "lldb.process.linux.operation"; + + if (IS_VALID_LLDB_HOST_THREAD(m_operation_thread)) + return; + + m_operation_thread = + Host::ThreadCreate(g_thread_name, AttachOpThread, args, &error); +} + +void * +NativeProcessLinux::AttachOpThread(void *arg) +{ + AttachArgs *args = static_cast(arg); + + if (!Attach(args)) { + sem_post(&args->m_semaphore); + return NULL; + } + + ServeOperation(args); + return NULL; +} + +bool +NativeProcessLinux::Attach(AttachArgs *args) +{ + lldb::pid_t pid = args->m_pid; + + NativeProcessLinux *monitor = args->m_monitor; + lldb::ThreadSP inferior; + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + + // Use a map to keep track of the threads which we have attached/need to attach. + Host::TidMap tids_to_attach; + if (pid <= 1) + { + args->m_error.SetErrorToGenericError(); + args->m_error.SetErrorString("Attaching to process 1 is not allowed."); + goto FINISH; + } + + while (Host::FindProcessThreads(pid, tids_to_attach)) + { + for (Host::TidMap::iterator it = tids_to_attach.begin(); + it != tids_to_attach.end();) + { + if (it->second == false) + { + lldb::tid_t tid = it->first; + + // Attach to the requested process. + // An attach will cause the thread to stop with a SIGSTOP. + if (PTRACE(PTRACE_ATTACH, tid, NULL, NULL, 0) < 0) + { + // No such thread. The thread may have exited. + // More error handling may be needed. + if (errno == ESRCH) + { + it = tids_to_attach.erase(it); + continue; + } + else + { + args->m_error.SetErrorToErrno(); + goto FINISH; + } + } + + int status; + // Need to use __WALL otherwise we receive an error with errno=ECHLD + // At this point we should have a thread stopped if waitpid succeeds. + if ((status = waitpid(tid, NULL, __WALL)) < 0) + { + // No such thread. The thread may have exited. + // More error handling may be needed. + if (errno == ESRCH) + { + it = tids_to_attach.erase(it); + continue; + } + else + { + args->m_error.SetErrorToErrno(); + goto FINISH; + } + } + + if (!SetDefaultPtraceOpts(tid)) + { + args->m_error.SetErrorToErrno(); + goto FINISH; + } + + + if (log) + log->Printf ("NativeProcessLinux::%s() adding tid = %" PRIu64, __FUNCTION__, tid); + + it->second = true; + + // Create the thread, mark it as stopped. + NativeThreadProtocolSP thread_sp (monitor->AddThread (static_cast (tid))); + assert (thread_sp && "AddThread() returned a nullptr"); + reinterpret_cast (thread_sp.get ())->SetStoppedBySignal (SIGSTOP); + monitor->SetCurrentThreadID (thread_sp->GetID ()); + } + + // move the loop forward + ++it; + } + } + + if (tids_to_attach.size() > 0) + { + monitor->m_pid = pid; + // Let our process instance know the thread has stopped. + monitor->SetState (StateType::eStateStopped); + } + else + { + args->m_error.SetErrorToGenericError(); + args->m_error.SetErrorString("No such process."); + } + + FINISH: + return args->m_error.Success(); +} + +bool +NativeProcessLinux::SetDefaultPtraceOpts(lldb::pid_t pid) +{ + long ptrace_opts = 0; + + // Have the child raise an event on exit. This is used to keep the child in + // limbo until it is destroyed. + ptrace_opts |= PTRACE_O_TRACEEXIT; + + // Have the tracer trace threads which spawn in the inferior process. + // TODO: if we want to support tracing the inferiors' child, add the + // appropriate ptrace flags here (PTRACE_O_TRACEFORK, PTRACE_O_TRACEVFORK) + ptrace_opts |= PTRACE_O_TRACECLONE; + + // Have the tracer notify us before execve returns + // (needed to disable legacy SIGTRAP generation) + ptrace_opts |= PTRACE_O_TRACEEXEC; + + return PTRACE(PTRACE_SETOPTIONS, pid, NULL, (void*)ptrace_opts, 0) >= 0; +} + +static ExitType convert_pid_status_to_exit_type (int status) +{ + if (WIFEXITED (status)) + return ExitType::eExitTypeExit; + else if (WIFSIGNALED (status)) + return ExitType::eExitTypeSignal; + else if (WIFSTOPPED (status)) + return ExitType::eExitTypeStop; + else + { + // We don't know what this is. + return ExitType::eExitTypeInvalid; + } +} + +static int convert_pid_status_to_return_code (int status) +{ + if (WIFEXITED (status)) + return WEXITSTATUS (status); + else if (WIFSIGNALED (status)) + return WTERMSIG (status); + else if (WIFSTOPPED (status)) + return WSTOPSIG (status); + else + { + // We don't know what this is. + return ExitType::eExitTypeInvalid; + } +} + +// Main process monitoring waitpid-loop handler. +bool +NativeProcessLinux::MonitorCallback(void *callback_baton, + lldb::pid_t pid, + bool exited, + int signal, + int status) +{ + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); + + NativeProcessLinux *const process = static_cast(callback_baton); + assert (process && "process is null"); + if (!process) + { + if (log) + log->Printf ("NativeProcessLinux::%s pid %" PRIu64 " callback_baton was null, can't determine process to use", __FUNCTION__, pid); + return true; + } + + // Certain activities differ based on whether the pid is the tid of the main thread. + const bool is_main_thread = (pid == process->GetID ()); + + // Assume we keep monitoring by default. + bool stop_monitoring = false; + + // Handle when the thread exits. + if (exited) + { + if (log) + log->Printf ("NativeProcessLinux::%s() got exit signal, tid = %" PRIu64 " (%s main thread)", __FUNCTION__, pid, is_main_thread ? "is" : "is not"); + + // This is a thread that exited. Ensure we're not tracking it anymore. + const bool thread_found = process->StopTrackingThread (pid); + + if (is_main_thread) + { + // We only set the exit status and notify the delegate if we haven't already set the process + // state to an exited state. We normally should have received a SIGTRAP | (PTRACE_EVENT_EXIT << 8) + // for the main thread. + const bool already_notified = (process->GetState() == StateType::eStateExited) | (process->GetState () == StateType::eStateCrashed); + if (!already_notified) + { + if (log) + log->Printf ("NativeProcessLinux::%s() tid = %" PRIu64 " handling main thread exit (%s), expected exit state already set but state was %s instead, setting exit state now", __FUNCTION__, pid, thread_found ? "stopped tracking thread metadata" : "thread metadata not found", StateAsCString (process->GetState ())); + // The main thread exited. We're done monitoring. Report to delegate. + process->SetExitStatus (convert_pid_status_to_exit_type (status), convert_pid_status_to_return_code (status), nullptr, true); + + // Notify delegate that our process has exited. + process->SetState (StateType::eStateExited, true); + } + else + { + if (log) + log->Printf ("NativeProcessLinux::%s() tid = %" PRIu64 " main thread now exited (%s)", __FUNCTION__, pid, thread_found ? "stopped tracking thread metadata" : "thread metadata not found"); + } + return true; + } + else + { + // Do we want to report to the delegate in this case? I think not. If this was an orderly + // thread exit, we would already have received the SIGTRAP | (PTRACE_EVENT_EXIT << 8) signal, + // and we would have done an all-stop then. + if (log) + log->Printf ("NativeProcessLinux::%s() tid = %" PRIu64 " handling non-main thread exit (%s)", __FUNCTION__, pid, thread_found ? "stopped tracking thread metadata" : "thread metadata not found"); + + // Not the main thread, we keep going. + return false; + } + } + + // Get details on the signal raised. + siginfo_t info; + int ptrace_err = 0; + + if (!process->GetSignalInfo (pid, &info, ptrace_err)) + { + if (ptrace_err == EINVAL) + { + // This is the first part of the Linux ptrace group-stop mechanism. + // The tracer (i.e. NativeProcessLinux) is expected to inject the signal + // into the tracee (i.e. inferior) at this point. + if (log) + log->Printf ("NativeProcessLinux::%s() resuming from group-stop", __FUNCTION__); + + // The inferior process is in 'group-stop', so deliver the stopping signal. + const bool signal_delivered = process->Resume (pid, info.si_signo); + if (log) + log->Printf ("NativeProcessLinux::%s() pid %" PRIu64 " group-stop signal delivery of signal 0x%x (%s) - %s", __FUNCTION__, pid, info.si_signo, GetUnixSignals ().GetSignalAsCString (info.si_signo), signal_delivered ? "success" : "failed"); + + assert(signal_delivered && "SIGSTOP delivery failed while in 'group-stop' state"); + + stop_monitoring = false; + } + else + { + // ptrace(GETSIGINFO) failed (but not due to group-stop). + + // A return value of ESRCH means the thread/process is no longer on the system, + // so it was killed somehow outside of our control. Either way, we can't do anything + // with it anymore. + + // We stop monitoring if it was the main thread. + stop_monitoring = is_main_thread; + + // Stop tracking the metadata for the thread since it's entirely off the system now. + const bool thread_found = process->StopTrackingThread (pid); + + if (log) + log->Printf ("NativeProcessLinux::%s GetSignalInfo failed: %s, tid = %" PRIu64 ", signal = %d, status = %d (%s, %s, %s)", + __FUNCTION__, strerror(ptrace_err), pid, signal, status, ptrace_err == ESRCH ? "thread/process killed" : "unknown reason", is_main_thread ? "is main thread" : "is not main thread", thread_found ? "thread metadata removed" : "thread metadata not found"); + + if (is_main_thread) + { + // Notify the delegate - our process is not available but appears to have been killed outside + // our control. Is eStateExited the right exit state in this case? + process->SetExitStatus (convert_pid_status_to_exit_type (status), convert_pid_status_to_return_code (status), nullptr, true); + process->SetState (StateType::eStateExited, true); + } + else + { + // This thread was pulled out from underneath us. Anything to do here? Do we want to do an all stop? + if (log) + log->Printf ("NativeProcessLinux::%s pid %" PRIu64 " tid %" PRIu64 " non-main thread exit occurred, didn't tell delegate anything since thread disappeared out from underneath us", __FUNCTION__, process->GetID (), pid); + } + } + } + else + { + // We have retrieved the signal info. Dispatch appropriately. + if (info.si_signo == SIGTRAP) + process->MonitorSIGTRAP(&info, pid); + else + process->MonitorSignal(&info, pid, exited); + + stop_monitoring = false; + } + + return stop_monitoring; +} + +void +NativeProcessLinux::MonitorSIGTRAP(const siginfo_t *info, lldb::pid_t pid) +{ + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + const bool is_main_thread = (pid == GetID ()); + + assert(info && info->si_signo == SIGTRAP && "Unexpected child signal!"); + if (!info) + return; + + // See if we can find a thread for this signal. + NativeThreadProtocolSP thread_sp = GetThreadByID (pid); + if (!thread_sp) + { + if (log) + log->Printf ("NativeProcessLinux::%s() pid %" PRIu64 " no thread found for tid %" PRIu64, __FUNCTION__, GetID (), pid); + } + + switch (info->si_code) + { + // TODO: these two cases are required if we want to support tracing of the inferiors' children. We'd need this to debug a monitor. + // case (SIGTRAP | (PTRACE_EVENT_FORK << 8)): + // case (SIGTRAP | (PTRACE_EVENT_VFORK << 8)): + + case (SIGTRAP | (PTRACE_EVENT_CLONE << 8)): + { + lldb::tid_t tid = LLDB_INVALID_THREAD_ID; + + unsigned long event_message = 0; + if (GetEventMessage(pid, &event_message)) + tid = static_cast (event_message); + + if (log) + log->Printf ("NativeProcessLinux::%s() pid %" PRIu64 " received thread creation event for tid %" PRIu64, __FUNCTION__, pid, tid); + + // If we don't track the thread yet: create it, mark as stopped. + // If we do track it, this is the wait we needed. Now resume the new thread. + // In all cases, resume the current (i.e. main process) thread. + bool already_tracked = false; + thread_sp = GetOrCreateThread (tid, already_tracked); + assert (thread_sp.get() && "failed to get or create the tracking data for newly created inferior thread"); + + // If the thread was already tracked, it means the created thread already received its SI_USER notification of creation. + if (already_tracked) + { + // FIXME loops like we want to stop all theads here. + // StopAllThreads + + // We can now resume the newly created thread since it is fully created. + reinterpret_cast (thread_sp.get ())->SetRunning (); + Resume (tid, LLDB_INVALID_SIGNAL_NUMBER); + } + else + { + // Mark the thread as currently launching. Need to wait for SIGTRAP clone on the main thread before + // this thread is ready to go. + reinterpret_cast (thread_sp.get ())->SetLaunching (); + } + + // In all cases, we can resume the main thread here. + Resume (pid, LLDB_INVALID_SIGNAL_NUMBER); + break; + } + + case (SIGTRAP | (PTRACE_EVENT_EXEC << 8)): + if (log) + log->Printf ("NativeProcessLinux::%s() received exec event, code = %d", __FUNCTION__, info->si_code ^ SIGTRAP); + // FIXME stop all threads, mark thread stop reason as ThreadStopInfo.reason = eStopReasonExec; + break; + + case (SIGTRAP | (PTRACE_EVENT_EXIT << 8)): + { + // The inferior process or one of its threads is about to exit. + // Maintain the process or thread in a state of "limbo" until we are + // explicitly commanded to detach, destroy, resume, etc. + unsigned long data = 0; + if (!GetEventMessage(pid, &data)) + data = -1; + + if (log) + { + log->Printf ("NativeProcessLinux::%s() received PTRACE_EVENT_EXIT, data = %lx (WIFEXITED=%s,WIFSIGNALED=%s), pid = %" PRIu64 " (%s)", + __FUNCTION__, + data, WIFEXITED (data) ? "true" : "false", WIFSIGNALED (data) ? "true" : "false", + pid, + is_main_thread ? "is main thread" : "not main thread"); + } + + // Set the thread to exited. + if (thread_sp) + reinterpret_cast (thread_sp.get ())->SetExited (); + else + { + if (log) + log->Printf ("NativeProcessLinux::%s() pid %" PRIu64 " failed to retrieve thread for tid %" PRIu64", cannot set thread state", __FUNCTION__, GetID (), pid); + } + + if (is_main_thread) + { + SetExitStatus (convert_pid_status_to_exit_type (data), convert_pid_status_to_return_code (data), nullptr, true); + // Resume the thread so it completely exits. + Resume (pid, LLDB_INVALID_SIGNAL_NUMBER); + } + else + { + // FIXME figure out the path where we plan to reap the metadata for the thread. + } + + break; + } + + case 0: + case TRAP_TRACE: + // We receive this on single stepping. + if (log) + log->Printf ("NativeProcessLinux::%s() received trace event, pid = %" PRIu64 " (single stepping)", __FUNCTION__, pid); + + if (thread_sp) + { + reinterpret_cast (thread_sp.get ())->SetStoppedBySignal (SIGTRAP); + SetCurrentThreadID (thread_sp->GetID ()); + } + else + { + if (log) + log->Printf ("NativeProcessLinux::%s() pid %" PRIu64 " tid %" PRIu64 " single stepping received trace but thread not found", __FUNCTION__, GetID (), pid); + } + + // Tell the process we have a stop (from single stepping). + SetState (StateType::eStateStopped, true); + break; + + case SI_KERNEL: + case TRAP_BRKPT: + if (log) + log->Printf ("NativeProcessLinux::%s() received breakpoint event, pid = %" PRIu64, __FUNCTION__, pid); + + // Mark the thread as stopped at breakpoint. + if (thread_sp) + { + reinterpret_cast (thread_sp.get ())->SetStoppedBySignal (SIGTRAP); + Error error = FixupBreakpointPCAsNeeded (thread_sp); + if (error.Fail ()) + { + if (log) + log->Printf ("NativeProcessLinux::%s() pid = %" PRIu64 " fixup: %s", __FUNCTION__, pid, error.AsCString ()); + } + } + else + { + if (log) + log->Printf ("NativeProcessLinux::%s() pid = %" PRIu64 ": warning, cannot process software breakpoint since no thread metadata", __FUNCTION__, pid); + } + + + // Tell the process we have a stop from this thread. + SetCurrentThreadID (pid); + SetState (StateType::eStateStopped, true); + break; + + case TRAP_HWBKPT: + if (log) + log->Printf ("NativeProcessLinux::%s() received watchpoint event, pid = %" PRIu64, __FUNCTION__, pid); + + // Mark the thread as stopped at watchpoint. + // The address is at (lldb::addr_t)info->si_addr if we need it. + if (thread_sp) + reinterpret_cast (thread_sp.get ())->SetStoppedBySignal (SIGTRAP); + else + { + if (log) + log->Printf ("NativeProcessLinux::%s() pid %" PRIu64 " tid %" PRIu64 ": warning, cannot process hardware breakpoint since no thread metadata", __FUNCTION__, GetID (), pid); + } + + // Tell the process we have a stop from this thread. + SetCurrentThreadID (pid); + SetState (StateType::eStateStopped, true); + break; + + case SIGTRAP: + case (SIGTRAP | 0x80): + if (log) + log->Printf ("NativeProcessLinux::%s() received system call stop event, pid %" PRIu64 "tid %" PRIu64, __FUNCTION__, GetID (), pid); + // Ignore these signals until we know more about them. + Resume(pid, 0); + break; + + default: + assert(false && "Unexpected SIGTRAP code!"); + if (log) + log->Printf ("NativeProcessLinux::%s() pid %" PRIu64 "tid %" PRIu64 " received unhandled SIGTRAP code: 0x%" PRIx64, __FUNCTION__, GetID (), pid, static_cast (SIGTRAP | (PTRACE_EVENT_CLONE << 8))); + break; + + } +} + +void +NativeProcessLinux::MonitorSignal(const siginfo_t *info, lldb::pid_t pid, bool exited) +{ + int signo = info->si_signo; + + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + + // POSIX says that process behaviour is undefined after it ignores a SIGFPE, + // SIGILL, SIGSEGV, or SIGBUS *unless* that signal was generated by a + // kill(2) or raise(3). Similarly for tgkill(2) on Linux. + // + // IOW, user generated signals never generate what we consider to be a + // "crash". + // + // Similarly, ACK signals generated by this monitor. + + // See if we can find a thread for this signal. + NativeThreadProtocolSP thread_sp = GetThreadByID (pid); + if (!thread_sp) + { + if (log) + log->Printf ("NativeProcessLinux::%s() pid %" PRIu64 " no thread found for tid %" PRIu64, __FUNCTION__, GetID (), pid); + } + + // Handle the signal. + if (info->si_code == SI_TKILL || info->si_code == SI_USER) + { + if (log) + log->Printf ("NativeProcessLinux::%s() received signal %s (%d) with code %s, (siginfo pid = %d (%s), waitpid pid = %" PRIu64 ")", + __FUNCTION__, + GetUnixSignals ().GetSignalAsCString (signo), + signo, + (info->si_code == SI_TKILL ? "SI_TKILL" : "SI_USER"), + info->si_pid, + (info->si_pid == getpid ()) ? "is monitor" : "is not monitor", + pid); + + if ((info->si_pid == 0) && info->si_code == SI_USER) + { + // A new thread creation is being signaled. This is one of two parts that come in + // a non-deterministic order. pid is the thread id. + if (log) + log->Printf ("NativeProcessLinux::%s() pid = %" PRIu64 " tid %" PRIu64 ": new thread notification", + __FUNCTION__, GetID (), pid); + + // Did we already create the thread? + bool already_tracked = false; + thread_sp = GetOrCreateThread (pid, already_tracked); + assert (thread_sp.get() && "failed to get or create the tracking data for newly created inferior thread"); + + // If the thread was already tracked, it means the main thread already received its SIGTRAP for the create. + if (already_tracked) + { + // We can now resume this thread up since it is fully created. + reinterpret_cast (thread_sp.get ())->SetRunning (); + Resume (thread_sp->GetID (), LLDB_INVALID_SIGNAL_NUMBER); + } + else + { + // Mark the thread as currently launching. Need to wait for SIGTRAP clone on the main thread before + // this thread is ready to go. + reinterpret_cast (thread_sp.get ())->SetLaunching (); + } + } + else if (info->si_pid == getpid () && (signo == SIGSTOP)) + { + // This is a tgkill()-based stop. + if (thread_sp) + { + // An inferior thread just stopped. Mark it as such. + reinterpret_cast (thread_sp.get ())->SetStoppedBySignal (signo); + SetCurrentThreadID (thread_sp->GetID ()); + + // Remove this tid from the wait-for-stop set. + Mutex::Locker locker (m_wait_for_stop_tids_mutex); + + auto removed_count = m_wait_for_stop_tids.erase (thread_sp->GetID ()); + if (removed_count < 1) + { + log->Printf ("NativeProcessLinux::%s() pid = %" PRIu64 " tid %" PRIu64 ": tgkill()-stopped thread not in m_wait_for_stop_tids", + __FUNCTION__, GetID (), thread_sp->GetID ()); + + } + + // If this is the last thread in the m_wait_for_stop_tids, we need to notify + // the delegate that a stop has occurred now that every thread that was supposed + // to stop has stopped. + if (m_wait_for_stop_tids.empty ()) + { + if (log) + { + log->Printf ("NativeProcessLinux::%s() pid %" PRIu64 " tid %" PRIu64 ", setting process state to stopped now that all tids marked for stop have completed", + __FUNCTION__, + GetID (), + pid); + } + SetState (StateType::eStateStopped, true); + } + } + } + else + { + // Hmm, not sure what to do with this. + if (log) + log->Printf ("NativeProcessLinux::%s() pid %" PRIu64 " unsure how to handle SI_KILL or SI_USER signal", __FUNCTION__, GetID ()); + } + + return; + } + + if (log) + log->Printf ("NativeProcessLinux::%s() received signal %s", __FUNCTION__, GetUnixSignals ().GetSignalAsCString (signo)); + + switch (signo) + { + case SIGSEGV: + { + lldb::addr_t fault_addr = reinterpret_cast(info->si_addr); + + // FIXME figure out how to propagate this properly. Seems like it + // should go in ThreadStopInfo. + // We can get more details on the exact nature of the crash here. + // ProcessMessage::CrashReason reason = GetCrashReasonForSIGSEGV(info); + if (!exited) + { + // This is just a pre-signal-delivery notification of the incoming signal. + // Send a stop to the debugger. + if (thread_sp) + { + reinterpret_cast (thread_sp.get ())->SetStoppedBySignal (signo); + SetCurrentThreadID (thread_sp->GetID ()); + } + SetState (StateType::eStateStopped, true); + } + else + { + if (thread_sp) + { + // FIXME figure out what type this is. + const uint64_t exception_type = static_cast (SIGSEGV); + reinterpret_cast (thread_sp.get ())->SetCrashedWithException (exception_type, fault_addr); + } + SetState (StateType::eStateCrashed, true); + } + } + break; + + case SIGILL: + { + // lldb::addr_t fault_addr = reinterpret_cast(info->si_addr); + // Can get the reason from here. + // ProcessMessage::CrashReason reason = GetCrashReasonForSIGILL(info); + // FIXME save the crash reason + SetState (StateType::eStateCrashed, true); + } + break; + + case SIGFPE: + { + // lldb::addr_t fault_addr = reinterpret_cast(info->si_addr); + // Can get the crash reason from below. + // ProcessMessage::CrashReason reason = GetCrashReasonForSIGFPE(info); + // FIXME save the crash reason + SetState (StateType::eStateCrashed, true); + } + break; + + case SIGBUS: + { + // lldb::addr_t fault_addr = reinterpret_cast(info->si_addr); + // Can get the crash reason from below. + // ProcessMessage::CrashReason reason = GetCrashReasonForSIGBUS(info); + // FIXME save the crash reason + SetState (StateType::eStateCrashed); + } + break; + + default: + // FIXME Stop all threads here. + break; + } +} + +Error +NativeProcessLinux::Resume (const ResumeActionList &resume_actions) +{ + Error error; + + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD)); + if (log) + log->Printf ("NativeProcessLinux::%s called: pid %" PRIu64, __FUNCTION__, GetID ()); + + int run_thread_count = 0; + int stop_thread_count = 0; + int step_thread_count = 0; + + std::vector new_stop_threads; + + Mutex::Locker locker (m_threads_mutex); + for (auto thread_sp : m_threads) + { + assert (thread_sp && "thread list should not contain NULL threads"); + NativeThreadLinux *const linux_thread_p = reinterpret_cast (thread_sp.get ()); + + const ResumeAction *const action = resume_actions.GetActionForThread (thread_sp->GetID (), true); + assert (action && "NULL ResumeAction returned for thread during Resume ()"); + + if (log) + { + log->Printf ("NativeProcessLinux::%s processing resume action state %s for pid %" PRIu64 " tid %" PRIu64, + __FUNCTION__, StateAsCString (action->state), GetID (), thread_sp->GetID ()); + } + + switch (action->state) + { + case eStateRunning: + // Run the thread, possibly feeding it the signal. + linux_thread_p->SetRunning (); + if (action->signal > 0) + { + // Resume the thread and deliver the given signal, + // then mark as delivered. + Resume (thread_sp->GetID (), action->signal); + resume_actions.SetSignalHandledForThread (thread_sp->GetID ()); + } + else + { + // Just resume the thread with no signal. + Resume (thread_sp->GetID (), LLDB_INVALID_SIGNAL_NUMBER); + } + ++run_thread_count; + break; + + case eStateStepping: + // Note: if we have multiple threads, we may need to stop + // the other threads first, then step this one. + linux_thread_p->SetStepping (); + if (SingleStep (thread_sp->GetID (), 0)) + { + if (log) + log->Printf ("NativeProcessLinux::%s pid %" PRIu64 " tid %" PRIu64 " single step succeeded", + __FUNCTION__, GetID (), thread_sp->GetID ()); + } + else + { + if (log) + log->Printf ("NativeProcessLinux::%s pid %" PRIu64 " tid %" PRIu64 " single step failed", + __FUNCTION__, GetID (), thread_sp->GetID ()); + } + ++step_thread_count; + break; + + case eStateSuspended: + case eStateStopped: + if (!StateIsStoppedState (linux_thread_p->GetState (), false)) + new_stop_threads.push_back (thread_sp); + else + { + if (log) + log->Printf ("NativeProcessLinux::%s no need to stop pid %" PRIu64 " tid %" PRIu64 ", thread state already %s", + __FUNCTION__, GetID (), thread_sp->GetID (), StateAsCString (linux_thread_p->GetState ())); + } + + ++stop_thread_count; + break; + + default: + return Error ("NativeProcessLinux::%s (): unexpected state %s specified for pid %" PRIu64 ", tid %" PRIu64, + __FUNCTION__, StateAsCString (action->state), GetID (), thread_sp->GetID ()); + } + } + + // If any thread was set to run, notify the process state as running. + if (run_thread_count > 0) + SetState (StateType::eStateRunning, true); + + // Now do a tgkill SIGSTOP on each thread we want to stop. + if (!new_stop_threads.empty ()) + { + // Lock the m_wait_for_stop_tids set so we can fill it with every thread we expect to have stopped. + Mutex::Locker stop_thread_id_locker (m_wait_for_stop_tids_mutex); + for (auto thread_sp : new_stop_threads) + { + // Send a stop signal to the thread. + const int result = tgkill (GetID (), thread_sp->GetID (), SIGSTOP); + if (result != 0) + { + // tgkill failed. + if (log) + log->Printf ("NativeProcessLinux::%s error: tgkill SIGSTOP for pid %" PRIu64 " tid %" PRIu64 "failed, retval %d", + __FUNCTION__, GetID (), thread_sp->GetID (), result); + } + else + { + // tgkill succeeded. Don't mark the thread state, though. Let the signal + // handling mark it. + if (log) + log->Printf ("NativeProcessLinux::%s tgkill SIGSTOP for pid %" PRIu64 " tid %" PRIu64 " succeeded", + __FUNCTION__, GetID (), thread_sp->GetID ()); + + // Add it to the set of threads we expect to signal a stop. + // We won't tell the delegate about it until this list drains to empty. + m_wait_for_stop_tids.insert (thread_sp->GetID ()); + } + } + } + + return error; +} + +Error +NativeProcessLinux::Halt () +{ + Error error; + + // FIXME check if we're already stopped + const bool is_stopped = false; + if (is_stopped) + return error; + + if (kill (GetID (), SIGSTOP) != 0) + error.SetErrorToErrno (); + + return error; +} + +Error +NativeProcessLinux::Detach () +{ + Error error; + + // Tell ptrace to detach from the process. + if (GetID () != LLDB_INVALID_PROCESS_ID) + error = Detach (GetID ()); + + // Stop monitoring the inferior. + StopMonitor (); + + // No error. + return error; +} + +Error +NativeProcessLinux::Signal (int signo) +{ + Error error; + + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + if (log) + log->Printf ("NativeProcessLinux::%s: sending signal %d (%s) to pid %" PRIu64, + __FUNCTION__, signo, GetUnixSignals ().GetSignalAsCString (signo), GetID ()); + + if (kill(GetID(), signo)) + error.SetErrorToErrno(); + + return error; +} + +Error +NativeProcessLinux::Kill () +{ + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + if (log) + log->Printf ("NativeProcessLinux::%s called for PID %" PRIu64, __FUNCTION__, GetID ()); + + Error error; + + switch (m_state) + { + case StateType::eStateInvalid: + case StateType::eStateExited: + case StateType::eStateCrashed: + case StateType::eStateDetached: + case StateType::eStateUnloaded: + // Nothing to do - the process is already dead. + if (log) + log->Printf ("NativeProcessLinux::%s ignored for PID %" PRIu64 " due to current state: %s", __FUNCTION__, GetID (), StateAsCString (m_state)); + return error; + + case StateType::eStateConnected: + case StateType::eStateAttaching: + case StateType::eStateLaunching: + case StateType::eStateStopped: + case StateType::eStateRunning: + case StateType::eStateStepping: + case StateType::eStateSuspended: + // We can try to kill a process in these states. + break; + } + + if (kill (GetID (), SIGKILL) != 0) + { + error.SetErrorToErrno (); + return error; + } + + return error; +} + +static Error +ParseMemoryRegionInfoFromProcMapsLine (const std::string &maps_line, MemoryRegionInfo &memory_region_info) +{ + memory_region_info.Clear(); + + StringExtractor line_extractor (maps_line.c_str ()); + + // Format: {address_start_hex}-{address_end_hex} perms offset dev inode pathname + // perms: rwxp (letter is present if set, '-' if not, final character is p=private, s=shared). + + // Parse out the starting address + lldb::addr_t start_address = line_extractor.GetHexMaxU64 (false, 0); + + // Parse out hyphen separating start and end address from range. + if (!line_extractor.GetBytesLeft () || (line_extractor.GetChar () != '-')) + return Error ("malformed /proc/{pid}/maps entry, missing dash between address range"); + + // Parse out the ending address + lldb::addr_t end_address = line_extractor.GetHexMaxU64 (false, start_address); + + // Parse out the space after the address. + if (!line_extractor.GetBytesLeft () || (line_extractor.GetChar () != ' ')) + return Error ("malformed /proc/{pid}/maps entry, missing space after range"); + + // Save the range. + memory_region_info.GetRange ().SetRangeBase (start_address); + memory_region_info.GetRange ().SetRangeEnd (end_address); + + // Parse out each permission entry. + if (line_extractor.GetBytesLeft () < 4) + return Error ("malformed /proc/{pid}/maps entry, missing some portion of permissions"); + + // Handle read permission. + const char read_perm_char = line_extractor.GetChar (); + if (read_perm_char == 'r') + memory_region_info.SetReadable (MemoryRegionInfo::OptionalBool::eYes); + else + { + assert ( (read_perm_char == '-') && "unexpected /proc/{pid}/maps read permission char" ); + memory_region_info.SetReadable (MemoryRegionInfo::OptionalBool::eNo); + } + + // Handle write permission. + const char write_perm_char = line_extractor.GetChar (); + if (write_perm_char == 'w') + memory_region_info.SetWritable (MemoryRegionInfo::OptionalBool::eYes); + else + { + assert ( (write_perm_char == '-') && "unexpected /proc/{pid}/maps write permission char" ); + memory_region_info.SetWritable (MemoryRegionInfo::OptionalBool::eNo); + } + + // Handle execute permission. + const char exec_perm_char = line_extractor.GetChar (); + if (exec_perm_char == 'x') + memory_region_info.SetExecutable (MemoryRegionInfo::OptionalBool::eYes); + else + { + assert ( (exec_perm_char == '-') && "unexpected /proc/{pid}/maps exec permission char" ); + memory_region_info.SetExecutable (MemoryRegionInfo::OptionalBool::eNo); + } + + return Error (); +} + +Error +NativeProcessLinux::GetMemoryRegionInfo (lldb::addr_t load_addr, MemoryRegionInfo &range_info) +{ + // FIXME review that the final memory region returned extends to the end of the virtual address space, + // with no perms if it is not mapped. + + // Use an approach that reads memory regions from /proc/{pid}/maps. + // Assume proc maps entries are in ascending order. + // FIXME assert if we find differently. + Mutex::Locker locker (m_mem_region_cache_mutex); + + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + Error error; + + if (m_supports_mem_region == LazyBool::eLazyBoolNo) + { + // We're done. + error.SetErrorString ("unsupported"); + return error; + } + + // If our cache is empty, pull the latest. There should always be at least one memory region + // if memory region handling is supported. + if (m_mem_region_cache.empty ()) + { + error = ProcFileReader::ProcessLineByLine (GetID (), "maps", + [&] (const std::string &line) -> bool + { + MemoryRegionInfo info; + const Error parse_error = ParseMemoryRegionInfoFromProcMapsLine (line, info); + if (parse_error.Success ()) + { + m_mem_region_cache.push_back (info); + return true; + } + else + { + if (log) + log->Printf ("NativeProcessLinux::%s failed to parse proc maps line '%s': %s", __FUNCTION__, line.c_str (), error.AsCString ()); + return false; + } + }); + + // If we had an error, we'll mark unsupported. + if (error.Fail ()) + { + m_supports_mem_region = LazyBool::eLazyBoolNo; + return error; + } + else if (m_mem_region_cache.empty ()) + { + // No entries after attempting to read them. This shouldn't happen if /proc/{pid}/maps + // is supported. Assume we don't support map entries via procfs. + if (log) + log->Printf ("NativeProcessLinux::%s failed to find any procfs maps entries, assuming no support for memory region metadata retrieval", __FUNCTION__); + m_supports_mem_region = LazyBool::eLazyBoolNo; + error.SetErrorString ("not supported"); + return error; + } + + if (log) + log->Printf ("NativeProcessLinux::%s read %" PRIu64 " memory region entries from /proc/%" PRIu64 "/maps", __FUNCTION__, static_cast (m_mem_region_cache.size ()), GetID ()); + + // We support memory retrieval, remember that. + m_supports_mem_region = LazyBool::eLazyBoolYes; + } + else + { + if (log) + log->Printf ("NativeProcessLinux::%s reusing %" PRIu64 " cached memory region entries", __FUNCTION__, static_cast (m_mem_region_cache.size ())); + } + + lldb::addr_t prev_base_address = 0; + + // FIXME start by finding the last region that is <= target address using binary search. Data is sorted. + // There can be a ton of regions on pthreads apps with lots of threads. + for (auto it = m_mem_region_cache.begin(); it != m_mem_region_cache.end (); ++it) + { + MemoryRegionInfo &proc_entry_info = *it; + + // Sanity check assumption that /proc/{pid}/maps entries are ascending. + assert ((proc_entry_info.GetRange ().GetRangeBase () >= prev_base_address) && "descending /proc/pid/maps entries detected, unexpected"); + prev_base_address = proc_entry_info.GetRange ().GetRangeBase (); + + // If the target address comes before this entry, indicate distance to next region. + if (load_addr < proc_entry_info.GetRange ().GetRangeBase ()) + { + range_info.GetRange ().SetRangeBase (load_addr); + range_info.GetRange ().SetByteSize (proc_entry_info.GetRange ().GetRangeBase () - load_addr); + range_info.SetReadable (MemoryRegionInfo::OptionalBool::eNo); + range_info.SetWritable (MemoryRegionInfo::OptionalBool::eNo); + range_info.SetExecutable (MemoryRegionInfo::OptionalBool::eNo); + + return error; + } + else if (proc_entry_info.GetRange ().Contains (load_addr)) + { + // The target address is within the memory region we're processing here. + range_info = proc_entry_info; + return error; + } + + // The target memory address comes somewhere after the region we just parsed. + } + + // If we made it here, we didn't find an entry that contained the given address. + error.SetErrorString ("address comes after final region"); + + if (log) + log->Printf ("NativeProcessLinux::%s failed to find map entry for address 0x%" PRIx64 ": %s", __FUNCTION__, load_addr, error.AsCString ()); + + return error; +} + +void +NativeProcessLinux::DoStopIDBumped (uint32_t newBumpId) +{ + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + if (log) + log->Printf ("NativeProcessLinux::%s(newBumpId=%" PRIu32 ") called", __FUNCTION__, newBumpId); + + { + Mutex::Locker locker (m_mem_region_cache_mutex); + if (log) + log->Printf ("NativeProcessLinux::%s clearing %" PRIu64 " entries from the cache", __FUNCTION__, static_cast (m_mem_region_cache.size ())); + m_mem_region_cache.clear (); + } +} + +Error +NativeProcessLinux::AllocateMemory ( + lldb::addr_t size, + uint32_t permissions, + lldb::addr_t &addr) +{ + // FIXME implementing this requires the equivalent of + // InferiorCallPOSIX::InferiorCallMmap, which depends on + // functional ThreadPlans working with Native*Protocol. +#if 1 + return Error ("not implemented yet"); +#else + addr = LLDB_INVALID_ADDRESS; + + unsigned prot = 0; + if (permissions & lldb::ePermissionsReadable) + prot |= eMmapProtRead; + if (permissions & lldb::ePermissionsWritable) + prot |= eMmapProtWrite; + if (permissions & lldb::ePermissionsExecutable) + prot |= eMmapProtExec; + + // TODO implement this directly in NativeProcessLinux + // (and lift to NativeProcessPOSIX if/when that class is + // refactored out). + if (InferiorCallMmap(this, addr, 0, size, prot, + eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) { + m_addr_to_mmap_size[addr] = size; + return Error (); + } else { + addr = LLDB_INVALID_ADDRESS; + return Error("unable to allocate %" PRIu64 " bytes of memory with permissions %s", size, GetPermissionsAsCString (permissions)); + } +#endif +} + +Error +NativeProcessLinux::DeallocateMemory (lldb::addr_t addr) +{ + // FIXME see comments in AllocateMemory - required lower-level + // bits not in place yet (ThreadPlans) + return Error ("not implemented"); +} + +lldb::addr_t +NativeProcessLinux::GetSharedLibraryInfoAddress () +{ +#if 1 + // punt on this for now + return LLDB_INVALID_ADDRESS; +#else + // Return the image info address for the exe module +#if 1 + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + + ModuleSP module_sp; + Error error = GetExeModuleSP (module_sp); + if (error.Fail ()) + { + if (log) + log->Warning ("NativeProcessLinux::%s failed to retrieve exe module: %s", __FUNCTION__, error.AsCString ()); + return LLDB_INVALID_ADDRESS; + } + + if (module_sp == nullptr) + { + if (log) + log->Warning ("NativeProcessLinux::%s exe module returned was NULL", __FUNCTION__); + return LLDB_INVALID_ADDRESS; + } + + ObjectFileSP object_file_sp = module_sp->GetObjectFile (); + if (object_file_sp == nullptr) + { + if (log) + log->Warning ("NativeProcessLinux::%s exe module returned a NULL object file", __FUNCTION__); + return LLDB_INVALID_ADDRESS; + } + + return obj_file_sp->GetImageInfoAddress(); +#else + Target *target = &GetTarget(); + ObjectFile *obj_file = target->GetExecutableModule()->GetObjectFile(); + Address addr = obj_file->GetImageInfoAddress(target); + + if (addr.IsValid()) + return addr.GetLoadAddress(target); + return LLDB_INVALID_ADDRESS; +#endif +#endif // punt on this for now +} + +size_t +NativeProcessLinux::UpdateThreads () +{ + // The NativeProcessLinux monitoring threads are always up to date + // with respect to thread state and they keep the thread list + // populated properly. All this method needs to do is return the + // thread count. + Mutex::Locker locker (m_threads_mutex); + return m_threads.size (); +} + +bool +NativeProcessLinux::GetArchitecture (ArchSpec &arch) const +{ + arch = m_arch; + return true; +} + +Error +NativeProcessLinux::GetSoftwareBreakpointSize (NativeRegisterContextSP context_sp, uint32_t &actual_opcode_size) +{ + // FIXME put this behind a breakpoint protocol class that can be + // set per architecture. Need ARM, MIPS support here. + static const uint8_t g_i386_opcode [] = { 0xCC }; + + switch (m_arch.GetMachine ()) + { + case llvm::Triple::x86: + case llvm::Triple::x86_64: + actual_opcode_size = static_cast (sizeof(g_i386_opcode)); + return Error (); + + default: + assert(false && "CPU type not supported!"); + return Error ("CPU type not supported"); + } +} + +Error +NativeProcessLinux::SetBreakpoint (lldb::addr_t addr, uint32_t size, bool hardware) +{ + if (hardware) + return Error ("NativeProcessLinux does not support hardware breakpoints"); + else + return SetSoftwareBreakpoint (addr, size); +} + +Error +NativeProcessLinux::GetSoftwareBreakpointTrapOpcode (size_t trap_opcode_size_hint, size_t &actual_opcode_size, const uint8_t *&trap_opcode_bytes) +{ + // FIXME put this behind a breakpoint protocol class that can be + // set per architecture. Need ARM, MIPS support here. + static const uint8_t g_i386_opcode [] = { 0xCC }; + + switch (m_arch.GetMachine ()) + { + case llvm::Triple::x86: + case llvm::Triple::x86_64: + trap_opcode_bytes = g_i386_opcode; + actual_opcode_size = sizeof(g_i386_opcode); + return Error (); + + default: + assert(false && "CPU type not supported!"); + return Error ("CPU type not supported"); + } +} + +#if 0 +ProcessMessage::CrashReason +NativeProcessLinux::GetCrashReasonForSIGSEGV(const siginfo_t *info) +{ + ProcessMessage::CrashReason reason; + assert(info->si_signo == SIGSEGV); + + reason = ProcessMessage::eInvalidCrashReason; + + switch (info->si_code) + { + default: + assert(false && "unexpected si_code for SIGSEGV"); + break; + case SI_KERNEL: + // Linux will occasionally send spurious SI_KERNEL codes. + // (this is poorly documented in sigaction) + // One way to get this is via unaligned SIMD loads. + reason = ProcessMessage::eInvalidAddress; // for lack of anything better + break; + case SEGV_MAPERR: + reason = ProcessMessage::eInvalidAddress; + break; + case SEGV_ACCERR: + reason = ProcessMessage::ePrivilegedAddress; + break; + } + + return reason; +} +#endif + + +#if 0 +ProcessMessage::CrashReason +NativeProcessLinux::GetCrashReasonForSIGILL(const siginfo_t *info) +{ + ProcessMessage::CrashReason reason; + assert(info->si_signo == SIGILL); + + reason = ProcessMessage::eInvalidCrashReason; + + switch (info->si_code) + { + default: + assert(false && "unexpected si_code for SIGILL"); + break; + case ILL_ILLOPC: + reason = ProcessMessage::eIllegalOpcode; + break; + case ILL_ILLOPN: + reason = ProcessMessage::eIllegalOperand; + break; + case ILL_ILLADR: + reason = ProcessMessage::eIllegalAddressingMode; + break; + case ILL_ILLTRP: + reason = ProcessMessage::eIllegalTrap; + break; + case ILL_PRVOPC: + reason = ProcessMessage::ePrivilegedOpcode; + break; + case ILL_PRVREG: + reason = ProcessMessage::ePrivilegedRegister; + break; + case ILL_COPROC: + reason = ProcessMessage::eCoprocessorError; + break; + case ILL_BADSTK: + reason = ProcessMessage::eInternalStackError; + break; + } + + return reason; +} +#endif + +#if 0 +ProcessMessage::CrashReason +NativeProcessLinux::GetCrashReasonForSIGFPE(const siginfo_t *info) +{ + ProcessMessage::CrashReason reason; + assert(info->si_signo == SIGFPE); + + reason = ProcessMessage::eInvalidCrashReason; + + switch (info->si_code) + { + default: + assert(false && "unexpected si_code for SIGFPE"); + break; + case FPE_INTDIV: + reason = ProcessMessage::eIntegerDivideByZero; + break; + case FPE_INTOVF: + reason = ProcessMessage::eIntegerOverflow; + break; + case FPE_FLTDIV: + reason = ProcessMessage::eFloatDivideByZero; + break; + case FPE_FLTOVF: + reason = ProcessMessage::eFloatOverflow; + break; + case FPE_FLTUND: + reason = ProcessMessage::eFloatUnderflow; + break; + case FPE_FLTRES: + reason = ProcessMessage::eFloatInexactResult; + break; + case FPE_FLTINV: + reason = ProcessMessage::eFloatInvalidOperation; + break; + case FPE_FLTSUB: + reason = ProcessMessage::eFloatSubscriptRange; + break; + } + + return reason; +} +#endif + +#if 0 +ProcessMessage::CrashReason +NativeProcessLinux::GetCrashReasonForSIGBUS(const siginfo_t *info) +{ + ProcessMessage::CrashReason reason; + assert(info->si_signo == SIGBUS); + + reason = ProcessMessage::eInvalidCrashReason; + + switch (info->si_code) + { + default: + assert(false && "unexpected si_code for SIGBUS"); + break; + case BUS_ADRALN: + reason = ProcessMessage::eIllegalAlignment; + break; + case BUS_ADRERR: + reason = ProcessMessage::eIllegalAddress; + break; + case BUS_OBJERR: + reason = ProcessMessage::eHardwareError; + break; + } + + return reason; +} +#endif + +void +NativeProcessLinux::ServeOperation(OperationArgs *args) +{ + NativeProcessLinux *monitor = args->m_monitor; + + // We are finised with the arguments and are ready to go. Sync with the + // parent thread and start serving operations on the inferior. + sem_post(&args->m_semaphore); + + for(;;) + { + // wait for next pending operation + if (sem_wait(&monitor->m_operation_pending)) + { + if (errno == EINTR) + continue; + assert(false && "Unexpected errno from sem_wait"); + } + + reinterpret_cast(monitor->m_operation)->Execute(monitor); + + // notify calling thread that operation is complete + sem_post(&monitor->m_operation_done); + } +} + +void +NativeProcessLinux::DoOperation(void *op) +{ + Mutex::Locker lock(m_operation_mutex); + + m_operation = op; + + // notify operation thread that an operation is ready to be processed + sem_post(&m_operation_pending); + + // wait for operation to complete + while (sem_wait(&m_operation_done)) + { + if (errno == EINTR) + continue; + assert(false && "Unexpected errno from sem_wait"); + } +} + +Error +NativeProcessLinux::ReadMemory (lldb::addr_t addr, void *buf, lldb::addr_t size, lldb::addr_t &bytes_read) +{ + ReadOperation op(addr, buf, size, bytes_read); + DoOperation(&op); + return op.GetError (); +} + +Error +NativeProcessLinux::WriteMemory (lldb::addr_t addr, const void *buf, lldb::addr_t size, lldb::addr_t &bytes_written) +{ + WriteOperation op(addr, buf, size, bytes_written); + DoOperation(&op); + return op.GetError (); +} + +bool +NativeProcessLinux::ReadRegisterValue(lldb::tid_t tid, uint32_t offset, const char* reg_name, + uint32_t size, RegisterValue &value) +{ + bool result; + ReadRegOperation op(tid, offset, reg_name, value, result); + DoOperation(&op); + return result; +} + +bool +NativeProcessLinux::WriteRegisterValue(lldb::tid_t tid, unsigned offset, + const char* reg_name, const RegisterValue &value) +{ + bool result; + WriteRegOperation op(tid, offset, reg_name, value, result); + DoOperation(&op); + return result; +} + +bool +NativeProcessLinux::ReadGPR(lldb::tid_t tid, void *buf, size_t buf_size) +{ + bool result; + ReadGPROperation op(tid, buf, buf_size, result); + DoOperation(&op); + return result; +} + +bool +NativeProcessLinux::ReadFPR(lldb::tid_t tid, void *buf, size_t buf_size) +{ + bool result; + ReadFPROperation op(tid, buf, buf_size, result); + DoOperation(&op); + return result; +} + +bool +NativeProcessLinux::ReadRegisterSet(lldb::tid_t tid, void *buf, size_t buf_size, unsigned int regset) +{ + bool result; + ReadRegisterSetOperation op(tid, buf, buf_size, regset, result); + DoOperation(&op); + return result; +} + +bool +NativeProcessLinux::WriteGPR(lldb::tid_t tid, void *buf, size_t buf_size) +{ + bool result; + WriteGPROperation op(tid, buf, buf_size, result); + DoOperation(&op); + return result; +} + +bool +NativeProcessLinux::WriteFPR(lldb::tid_t tid, void *buf, size_t buf_size) +{ + bool result; + WriteFPROperation op(tid, buf, buf_size, result); + DoOperation(&op); + return result; +} + +bool +NativeProcessLinux::WriteRegisterSet(lldb::tid_t tid, void *buf, size_t buf_size, unsigned int regset) +{ + bool result; + WriteRegisterSetOperation op(tid, buf, buf_size, regset, result); + DoOperation(&op); + return result; +} + +bool +NativeProcessLinux::Resume (lldb::tid_t tid, uint32_t signo) +{ + bool result; + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); + + if (log) + log->Printf ("NativeProcessLinux::%s() resuming thread = %" PRIu64 " with signal %s", __FUNCTION__, tid, + GetUnixSignals().GetSignalAsCString (signo)); + ResumeOperation op (tid, signo, result); + DoOperation (&op); + if (log) + log->Printf ("NativeProcessLinux::%s() resuming result = %s", __FUNCTION__, result ? "true" : "false"); + return result; +} + +bool +NativeProcessLinux::SingleStep(lldb::tid_t tid, uint32_t signo) +{ + bool result; + SingleStepOperation op(tid, signo, result); + DoOperation(&op); + return result; +} + +bool +NativeProcessLinux::GetSignalInfo(lldb::tid_t tid, void *siginfo, int &ptrace_err) +{ + bool result; + SiginfoOperation op(tid, siginfo, result, ptrace_err); + DoOperation(&op); + return result; +} + +bool +NativeProcessLinux::GetEventMessage(lldb::tid_t tid, unsigned long *message) +{ + bool result; + EventMessageOperation op(tid, message, result); + DoOperation(&op); + return result; +} + +lldb_private::Error +NativeProcessLinux::Detach(lldb::tid_t tid) +{ + lldb_private::Error error; + if (tid != LLDB_INVALID_THREAD_ID) + { + DetachOperation op(tid, error); + DoOperation(&op); + } + return error; +} + +bool +NativeProcessLinux::DupDescriptor(const char *path, int fd, int flags) +{ + int target_fd = open(path, flags, 0666); + + if (target_fd == -1) + return false; + + return (dup2(target_fd, fd) == -1) ? false : true; +} + +void +NativeProcessLinux::StopMonitoringChildProcess() +{ + lldb::thread_result_t thread_result; + + if (IS_VALID_LLDB_HOST_THREAD(m_monitor_thread)) + { + Host::ThreadCancel(m_monitor_thread, NULL); + Host::ThreadJoin(m_monitor_thread, &thread_result, NULL); + m_monitor_thread = LLDB_INVALID_HOST_THREAD; + } +} + +void +NativeProcessLinux::StopMonitor() +{ + StopMonitoringChildProcess(); + StopOpThread(); + sem_destroy(&m_operation_pending); + sem_destroy(&m_operation_done); + + // TODO: validate whether this still holds, fix up comment. + // Note: ProcessPOSIX passes the m_terminal_fd file descriptor to + // Process::SetSTDIOFileDescriptor, which in turn transfers ownership of + // the descriptor to a ConnectionFileDescriptor object. Consequently + // even though still has the file descriptor, we shouldn't close it here. +} + +void +NativeProcessLinux::StopOpThread() +{ + lldb::thread_result_t result; + + if (!IS_VALID_LLDB_HOST_THREAD(m_operation_thread)) + return; + + Host::ThreadCancel(m_operation_thread, NULL); + Host::ThreadJoin(m_operation_thread, &result, NULL); + m_operation_thread = LLDB_INVALID_HOST_THREAD; +} + +bool +NativeProcessLinux::HasThreadNoLock (lldb::tid_t thread_id) +{ + for (auto thread_sp : m_threads) + { + assert (thread_sp && "thread list should not contain NULL threads"); + if (thread_sp->GetID () == thread_id) + { + // We have this thread. + return true; + } + } + + // We don't have this thread. + return false; +} + +NativeThreadProtocolSP +NativeProcessLinux::MaybeGetThreadNoLock (lldb::tid_t thread_id) +{ + // CONSIDER organize threads by map - we can do better than linear. + for (auto thread_sp : m_threads) + { + if (thread_sp->GetID () == thread_id) + return thread_sp; + } + + // We don't have this thread. + return NativeThreadProtocolSP (); +} + +bool +NativeProcessLinux::StopTrackingThread (lldb::tid_t thread_id) +{ + Mutex::Locker locker (m_threads_mutex); + for (auto it = m_threads.begin (); it != m_threads.end (); ++it) + { + if (*it && ((*it)->GetID () == thread_id)) + { + m_threads.erase (it); + return true; + } + } + + // Didn't find it. + return false; +} + +NativeThreadProtocolSP +NativeProcessLinux::AddThread (lldb::tid_t thread_id) +{ + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD)); + + Mutex::Locker locker (m_threads_mutex); + + if (log) + { + log->Printf ("NativeProcessLinux::%s pid %" PRIu64 " adding thread with tid %" PRIu64, + __FUNCTION__, + GetID (), + thread_id); + } + + assert (!HasThreadNoLock (thread_id) && "attempted to add a thread by id that already exists"); + + // If this is the first thread, save it as the current thread + if (m_threads.empty ()) + SetCurrentThreadID (thread_id); + + NativeThreadProtocolSP thread_sp (new NativeThreadLinux (this, thread_id)); + m_threads.push_back (thread_sp); + + return thread_sp; +} + +NativeThreadProtocolSP +NativeProcessLinux::GetOrCreateThread (lldb::tid_t thread_id, bool &created) +{ + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD)); + + Mutex::Locker locker (m_threads_mutex); + if (log) + { + log->Printf ("NativeProcessLinux::%s pid %" PRIu64 " get/create thread with tid %" PRIu64, + __FUNCTION__, + GetID (), + thread_id); + } + + // Retrieve the thread if it is already getting tracked. + NativeThreadProtocolSP thread_sp = MaybeGetThreadNoLock (thread_id); + if (thread_sp) + { + if (log) + log->Printf ("NativeProcessLinux::%s pid %" PRIu64 " tid %" PRIu64 ": thread already tracked, returning", + __FUNCTION__, + GetID (), + thread_id); + created = false; + return thread_sp; + + } + + // Create the thread metadata since it isn't being tracked. + if (log) + log->Printf ("NativeProcessLinux::%s pid %" PRIu64 " tid %" PRIu64 ": thread didn't exist, tracking now", + __FUNCTION__, + GetID (), + thread_id); + + thread_sp.reset (new NativeThreadLinux (this, thread_id)); + m_threads.push_back (thread_sp); + created = true; + + return thread_sp; +} + +Error +NativeProcessLinux::FixupBreakpointPCAsNeeded (NativeThreadProtocolSP &thread_sp) +{ + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD)); + + Error error; + + // Get a linux thread pointer. + if (!thread_sp) + { + error.SetErrorString ("null thread_sp"); + if (log) + log->Printf ("NativeProcessLinux::%s failed: %s", __FUNCTION__, error.AsCString ()); + return error; + } + NativeThreadLinux *const linux_thread_p = reinterpret_cast (thread_sp.get()); + + // Find out the size of a breakpoint (might depend on where we are in the code). + NativeRegisterContextSP context_sp = linux_thread_p->GetRegisterContext (); + if (!context_sp) + { + error.SetErrorString ("cannot get a NativeRegisterContext for the thread"); + if (log) + log->Printf ("NativeProcessLinux::%s failed: %s", __FUNCTION__, error.AsCString ()); + return error; + } + + uint32_t breakpoint_size = 0; + error = GetSoftwareBreakpointSize (context_sp, breakpoint_size); + if (error.Fail ()) + { + if (log) + log->Printf ("NativeProcessLinux::%s GetBreakpointSize() failed: %s", __FUNCTION__, error.AsCString ()); + return error; + } + else + { + if (log) + log->Printf ("NativeProcessLinux::%s breakpoint size: %" PRIu32, __FUNCTION__, breakpoint_size); + } + + // First try probing for a breakpoint at a software breakpoint location: PC - breakpoint size. + const lldb::addr_t initial_pc_addr = context_sp->GetPC (); + lldb::addr_t breakpoint_addr = initial_pc_addr; + if (breakpoint_size > static_cast (0)) + { + // Do not allow breakpoint probe to wrap around. + if (breakpoint_addr >= static_cast (breakpoint_size)) + breakpoint_addr -= static_cast (breakpoint_size); + } + + // Check if we stopped because of a breakpoint. + NativeBreakpointSP breakpoint_sp; + error = m_breakpoint_list.GetBreakpoint (breakpoint_addr, breakpoint_sp); + if (!error.Success () || !breakpoint_sp) + { + // We didn't find one at a software probe location. Nothing to do. + if (log) + log->Printf ("NativeProcessLinux::%s pid %" PRIu64 " no lldb breakpoint found at current pc with adjustment: 0x%" PRIx64, __FUNCTION__, GetID (), breakpoint_addr); + return Error (); + } + + // If the breakpoint is not a software breakpoint, nothing to do. + if (!breakpoint_sp->IsSoftwareBreakpoint ()) + { + if (log) + log->Printf ("NativeProcessLinux::%s pid %" PRIu64 " breakpoint found at 0x%" PRIx64 ", not software, nothing to adjust", __FUNCTION__, GetID (), breakpoint_addr); + return Error (); + } + + // + // We have a software breakpoint and need to adjust the PC. + // + + // Sanity check. + if (breakpoint_size == 0) + { + // Nothing to do! How did we get here? + if (log) + log->Printf ("NativeProcessLinux::%s pid %" PRIu64 " breakpoint found at 0x%" PRIx64 ", it is software, but the size is zero, nothing to do (unexpected)", __FUNCTION__, GetID (), breakpoint_addr); + return Error (); + } + + // Change the program counter. + if (log) + log->Printf ("NativeProcessLinux::%s pid %" PRIu64 " tid %" PRIu64 ": changing PC from 0x%" PRIx64 " to 0x%" PRIx64, __FUNCTION__, GetID (), linux_thread_p->GetID (), initial_pc_addr, breakpoint_addr); + + error = context_sp->SetPC (breakpoint_addr); + if (error.Fail ()) + { + if (log) + log->Printf ("NativeProcessLinux::%s pid %" PRIu64 " tid %" PRIu64 ": failed to set PC: %s", __FUNCTION__, GetID (), linux_thread_p->GetID (), error.AsCString ()); + return error; + } + + return error; +} diff --git a/lldb/source/Plugins/Process/Linux/NativeProcessLinux.h b/lldb/source/Plugins/Process/Linux/NativeProcessLinux.h new file mode 100644 index 0000000..f72b01b --- /dev/null +++ b/lldb/source/Plugins/Process/Linux/NativeProcessLinux.h @@ -0,0 +1,379 @@ +//===-- NativeProcessLinux.h ---------------------------------- -*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_NativeProcessLinux_H_ +#define liblldb_NativeProcessLinux_H_ + +// C Includes +#include +#include + +// C++ Includes +#include + +// Other libraries and framework includes +#include "lldb/Core/ArchSpec.h" +#include "lldb/lldb-types.h" +#include "lldb/Host/Debug.h" +#include "lldb/Host/Mutex.h" +#include "lldb/Target/MemoryRegionInfo.h" + +#include "Host/common/NativeProcessProtocol.h" + +namespace lldb_private +{ + class Error; + class Module; + class Scalar; + + /// @class NativeProcessLinux + /// @brief Manages communication with the inferior (debugee) process. + /// + /// Upon construction, this class prepares and launches an inferior process for + /// debugging. + /// + /// Changes in the inferior process state are broadcasted. + class NativeProcessLinux: public NativeProcessProtocol + { + public: + + // --------------------------------------------------------------------- + // Public Static Methods + // --------------------------------------------------------------------- + static lldb_private::Error + LaunchProcess ( + Module *exe_module, + ProcessLaunchInfo &launch_info, + lldb_private::NativeProcessProtocol::NativeDelegate &native_delegate, + NativeProcessProtocolSP &native_process_sp); + + static lldb_private::Error + AttachToProcess ( + lldb::pid_t pid, + lldb_private::NativeProcessProtocol::NativeDelegate &native_delegate, + NativeProcessProtocolSP &native_process_sp); + + // --------------------------------------------------------------------- + // Public Instance Methods + // --------------------------------------------------------------------- + + ~NativeProcessLinux() override; + + // --------------------------------------------------------------------- + // NativeProcessProtocol Interface + // --------------------------------------------------------------------- + Error + Resume (const ResumeActionList &resume_actions) override; + + Error + Halt () override; + + Error + Detach () override; + + Error + Signal (int signo) override; + + Error + Kill () override; + + Error + GetMemoryRegionInfo (lldb::addr_t load_addr, MemoryRegionInfo &range_info) override; + + Error + ReadMemory (lldb::addr_t addr, void *buf, lldb::addr_t size, lldb::addr_t &bytes_read) override; + + Error + WriteMemory (lldb::addr_t addr, const void *buf, lldb::addr_t size, lldb::addr_t &bytes_written) override; + + Error + AllocateMemory (lldb::addr_t size, uint32_t permissions, lldb::addr_t &addr) override; + + Error + DeallocateMemory (lldb::addr_t addr) override; + + lldb::addr_t + GetSharedLibraryInfoAddress () override; + + size_t + UpdateThreads () override; + + bool + GetArchitecture (ArchSpec &arch) const override; + + Error + SetBreakpoint (lldb::addr_t addr, uint32_t size, bool hardware) override; + + void + DoStopIDBumped (uint32_t newBumpId) override; + + // --------------------------------------------------------------------- + // Interface used by NativeRegisterContext-derived classes. + // --------------------------------------------------------------------- + + /// Reads the contents from the register identified by the given (architecture + /// dependent) offset. + /// + /// This method is provided for use by RegisterContextLinux derivatives. + bool + ReadRegisterValue(lldb::tid_t tid, unsigned offset, const char *reg_name, + unsigned size, lldb_private::RegisterValue &value); + + /// Writes the given value to the register identified by the given + /// (architecture dependent) offset. + /// + /// This method is provided for use by RegisterContextLinux derivatives. + bool + WriteRegisterValue(lldb::tid_t tid, unsigned offset, const char *reg_name, + const lldb_private::RegisterValue &value); + + /// Reads all general purpose registers into the specified buffer. + bool + ReadGPR(lldb::tid_t tid, void *buf, size_t buf_size); + + /// Reads generic floating point registers into the specified buffer. + bool + ReadFPR(lldb::tid_t tid, void *buf, size_t buf_size); + + /// Reads the specified register set into the specified buffer. + /// For instance, the extended floating-point register set. + bool + ReadRegisterSet(lldb::tid_t tid, void *buf, size_t buf_size, unsigned int regset); + + /// Writes all general purpose registers into the specified buffer. + bool + WriteGPR(lldb::tid_t tid, void *buf, size_t buf_size); + + /// Writes generic floating point registers into the specified buffer. + bool + WriteFPR(lldb::tid_t tid, void *buf, size_t buf_size); + + /// Writes the specified register set into the specified buffer. + /// For instance, the extended floating-point register set. + bool + WriteRegisterSet(lldb::tid_t tid, void *buf, size_t buf_size, unsigned int regset); + + protected: + // --------------------------------------------------------------------- + // NativeProcessProtocol protected interface + // --------------------------------------------------------------------- + Error + GetSoftwareBreakpointTrapOpcode (size_t trap_opcode_size_hint, size_t &actual_opcode_size, const uint8_t *&trap_opcode_bytes) override; + + private: + + lldb_private::ArchSpec m_arch; + + lldb::thread_t m_operation_thread; + lldb::thread_t m_monitor_thread; + + // current operation which must be executed on the priviliged thread + void *m_operation; + lldb_private::Mutex m_operation_mutex; + + // semaphores notified when Operation is ready to be processed and when + // the operation is complete. + sem_t m_operation_pending; + sem_t m_operation_done; + + // Set of tids we're waiting to stop before we notify the delegate of + // the stopped state. We only notify the delegate after all threads + // ordered to stop have signaled their stop. + std::unordered_set m_wait_for_stop_tids; + lldb_private::Mutex m_wait_for_stop_tids_mutex; + + lldb_private::LazyBool m_supports_mem_region; + std::vector m_mem_region_cache; + lldb_private::Mutex m_mem_region_cache_mutex; + + + struct OperationArgs + { + OperationArgs(NativeProcessLinux *monitor); + + ~OperationArgs(); + + NativeProcessLinux *m_monitor; // The monitor performing the attach. + sem_t m_semaphore; // Posted to once operation complete. + lldb_private::Error m_error; // Set if process operation failed. + }; + + /// @class LauchArgs + /// + /// @brief Simple structure to pass data to the thread responsible for + /// launching a child process. + struct LaunchArgs : OperationArgs + { + LaunchArgs(NativeProcessLinux *monitor, + lldb_private::Module *module, + char const **argv, + char const **envp, + const char *stdin_path, + const char *stdout_path, + const char *stderr_path, + const char *working_dir); + + ~LaunchArgs(); + + lldb_private::Module *m_module; // The executable image to launch. + char const **m_argv; // Process arguments. + char const **m_envp; // Process environment. + const char *m_stdin_path; // Redirect stdin or NULL. + const char *m_stdout_path; // Redirect stdout or NULL. + const char *m_stderr_path; // Redirect stderr or NULL. + const char *m_working_dir; // Working directory or NULL. + }; + + struct AttachArgs : OperationArgs + { + AttachArgs(NativeProcessLinux *monitor, + lldb::pid_t pid); + + ~AttachArgs(); + + lldb::pid_t m_pid; // pid of the process to be attached. + }; + + // --------------------------------------------------------------------- + // Private Instance Methods + // --------------------------------------------------------------------- + NativeProcessLinux (); + + /// Launches an inferior process ready for debugging. Forms the + /// implementation of Process::DoLaunch. + void + LaunchInferior ( + Module *module, + char const *argv[], + char const *envp[], + const char *stdin_path, + const char *stdout_path, + const char *stderr_path, + const char *working_dir, + Error &error); + + /// Attaches to an existing process. Forms the + /// implementation of Process::DoLaunch. + void + AttachToInferior (lldb::pid_t pid, Error &error); + + void + StartLaunchOpThread(LaunchArgs *args, lldb_private::Error &error); + + static void * + LaunchOpThread(void *arg); + + static bool + Launch(LaunchArgs *args); + + void + StartAttachOpThread(AttachArgs *args, lldb_private::Error &error); + + static void * + AttachOpThread(void *args); + + static bool + Attach(AttachArgs *args); + + static bool + SetDefaultPtraceOpts(const lldb::pid_t); + + static void + ServeOperation(OperationArgs *args); + + static bool + DupDescriptor(const char *path, int fd, int flags); + + static bool + MonitorCallback(void *callback_baton, + lldb::pid_t pid, bool exited, int signal, int status); + + void + MonitorSIGTRAP(const siginfo_t *info, lldb::pid_t pid); + + void + MonitorSignal(const siginfo_t *info, lldb::pid_t pid, bool exited); + +#if 0 + static ::ProcessMessage::CrashReason + GetCrashReasonForSIGSEGV(const siginfo_t *info); + + static ::ProcessMessage::CrashReason + GetCrashReasonForSIGILL(const siginfo_t *info); + + static ::ProcessMessage::CrashReason + GetCrashReasonForSIGFPE(const siginfo_t *info); + + static ::ProcessMessage::CrashReason + GetCrashReasonForSIGBUS(const siginfo_t *info); +#endif + + void + DoOperation(void *op); + + /// Stops the child monitor thread. + void + StopMonitoringChildProcess(); + + /// Stops the operation thread used to attach/launch a process. + void + StopOpThread(); + + /// Stops monitoring the child process thread. + void + StopMonitor(); + + bool + HasThreadNoLock (lldb::tid_t thread_id); + + NativeThreadProtocolSP + MaybeGetThreadNoLock (lldb::tid_t thread_id); + + bool + StopTrackingThread (lldb::tid_t thread_id); + + NativeThreadProtocolSP + AddThread (lldb::tid_t thread_id); + + NativeThreadProtocolSP + GetOrCreateThread (lldb::tid_t thread_id, bool &created); + + Error + GetSoftwareBreakpointSize (NativeRegisterContextSP context_sp, uint32_t &actual_opcode_size); + + Error + FixupBreakpointPCAsNeeded (NativeThreadProtocolSP &thread_sp); + + /// Writes a siginfo_t structure corresponding to the given thread ID to the + /// memory region pointed to by @p siginfo. + bool + GetSignalInfo(lldb::tid_t tid, void *siginfo, int &ptrace_err); + + /// Writes the raw event message code (vis-a-vis PTRACE_GETEVENTMSG) + /// corresponding to the given thread ID to the memory pointed to by @p + /// message. + bool + GetEventMessage(lldb::tid_t tid, unsigned long *message); + + /// Resumes the given thread. If @p signo is anything but + /// LLDB_INVALID_SIGNAL_NUMBER, deliver that signal to the thread. + bool + Resume(lldb::tid_t tid, uint32_t signo); + + /// Single steps the given thread. If @p signo is anything but + /// LLDB_INVALID_SIGNAL_NUMBER, deliver that signal to the thread. + bool + SingleStep(lldb::tid_t tid, uint32_t signo); + + lldb_private::Error + Detach(lldb::tid_t tid); + }; +} // End lldb_private namespace. + +#endif // #ifndef liblldb_NativeProcessLinux_H_ diff --git a/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp b/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp new file mode 100644 index 0000000..d9cd183 --- /dev/null +++ b/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp @@ -0,0 +1,363 @@ +//===-- NativeThreadLinux.cpp --------------------------------- -*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "NativeThreadLinux.h" + +#include + +#include "NativeProcessLinux.h" +#include "lldb/Core/Log.h" +#include "lldb/Core/State.h" +#include "lldb/Host/Host.h" +#include "lldb/lldb-enumerations.h" +#include "lldb/lldb-private-log.h" +#include "Plugins/Process/Utility/NativeRegisterContextLinux_x86_64.h" +#include "Plugins/Process/Utility/RegisterContextLinux_i386.h" +#include "Plugins/Process/Utility/RegisterContextLinux_x86_64.h" +#include "Plugins/Process/Utility/RegisterInfoInterface.h" + +using namespace lldb; +using namespace lldb_private; + +namespace +{ + void LogThreadStopInfo (Log &log, const ThreadStopInfo &stop_info, const char *const header) + { + switch (stop_info.reason) + { + case eStopReasonSignal: + log.Printf ("%s: %s: signal 0x%" PRIx32, __FUNCTION__, header, stop_info.details.signal.signo); + return; + case eStopReasonException: + log.Printf ("%s: %s: exception type 0x%" PRIx64, __FUNCTION__, header, stop_info.details.exception.type); + return; + default: + log.Printf ("%s: %s: invalid stop reason %" PRIu32, __FUNCTION__, header, static_cast (stop_info.reason)); + } + } +} + +NativeThreadLinux::NativeThreadLinux (NativeProcessLinux *process, lldb::tid_t tid) : + NativeThreadProtocol (process, tid), + m_state (StateType::eStateInvalid), + m_stop_info (), + m_reg_context_sp () +{ +} + +const char * +NativeThreadLinux::GetName() +{ + NativeProcessProtocolSP process_sp = m_process_wp.lock (); + if (!process_sp) + return ""; + + // const NativeProcessLinux *const process = reinterpret_cast (process_sp->get ()); + return Host::GetThreadName (process_sp->GetID (), GetID ()).c_str (); +} + +lldb::StateType +NativeThreadLinux::GetState () +{ + return m_state; +} + + +bool +NativeThreadLinux::GetStopReason (ThreadStopInfo &stop_info) +{ + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD)); + switch (m_state) + { + case eStateStopped: + case eStateCrashed: + case eStateExited: + case eStateSuspended: + case eStateUnloaded: + if (log) + LogThreadStopInfo (*log, m_stop_info, "m_stop_info in thread: "); + stop_info = m_stop_info; + if (log) + LogThreadStopInfo (*log, stop_info, "returned stop_info: "); + return true; + + case eStateInvalid: + case eStateConnected: + case eStateAttaching: + case eStateLaunching: + case eStateRunning: + case eStateStepping: + case eStateDetached: + default: + if (log) + { + log->Printf ("NativeThreadLinux::%s tid %" PRIu64 " in state %s cannot answer stop reason", + __FUNCTION__, GetID (), StateAsCString (m_state)); + } + return false; + } +} + +lldb_private::NativeRegisterContextSP +NativeThreadLinux::GetRegisterContext () +{ + // Return the register context if we already created it. + if (m_reg_context_sp) + return m_reg_context_sp; + + // First select the appropriate RegisterInfoInterface. + RegisterInfoInterface *reg_interface = nullptr; + NativeProcessProtocolSP m_process_sp = m_process_wp.lock (); + if (!m_process_sp) + return NativeRegisterContextSP (); + + ArchSpec target_arch; + if (!m_process_sp->GetArchitecture (target_arch)) + return NativeRegisterContextSP (); + + switch (target_arch.GetTriple().getOS()) + { + case llvm::Triple::Linux: + switch (target_arch.GetMachine()) + { + case llvm::Triple::x86: + case llvm::Triple::x86_64: + if (Host::GetArchitecture().GetAddressByteSize() == 4) + { + // 32-bit hosts run with a RegisterContextLinux_i386 context. + reg_interface = static_cast(new RegisterContextLinux_i386(target_arch)); + } + else + { + assert((Host::GetArchitecture ().GetAddressByteSize () == 8) && "Register setting path assumes this is a 64-bit host"); + // X86_64 hosts know how to work with 64-bit and 32-bit EXEs using the x86_64 register context. + reg_interface = static_cast (new RegisterContextLinux_x86_64 (target_arch)); + } + break; + default: + break; + } + break; + default: + break; + } + + assert(reg_interface && "OS or CPU not supported!"); + if (!reg_interface) + return NativeRegisterContextSP (); + + // Now create the register context. + switch (target_arch.GetMachine()) + { +#if 0 + case llvm::Triple::mips64: + { + RegisterContextPOSIXProcessMonitor_mips64 *reg_ctx = new RegisterContextPOSIXProcessMonitor_mips64(*this, 0, reg_interface); + m_posix_thread = reg_ctx; + m_reg_context_sp.reset(reg_ctx); + break; + } +#endif +#if 0 + case llvm::Triple::x86: +#endif + case llvm::Triple::x86_64: + { + const uint32_t concrete_frame_idx = 0; + m_reg_context_sp.reset (new NativeRegisterContextLinux_x86_64(*this, concrete_frame_idx, reg_interface)); + break; + } + default: + break; + } + + return m_reg_context_sp; +} + +Error +NativeThreadLinux::SetWatchpoint (lldb::addr_t addr, size_t size, uint32_t watch_flags, bool hardware) +{ + // TODO implement + return Error ("not implemented"); +} + +Error +NativeThreadLinux::RemoveWatchpoint (lldb::addr_t addr) +{ + // TODO implement + return Error ("not implemented"); +} + +void +NativeThreadLinux::SetLaunching () +{ + const StateType new_state = StateType::eStateLaunching; + MaybeLogStateChange (new_state); + m_state = new_state; + + // Also mark it as stopped since launching temporarily stops the newly created thread + // in the ptrace machinery. + m_stop_info.reason = StopReason::eStopReasonSignal; + m_stop_info.details.signal.signo = SIGSTOP; +} + + +void +NativeThreadLinux::SetRunning () +{ + const StateType new_state = StateType::eStateRunning; + MaybeLogStateChange (new_state); + m_state = new_state; + + m_stop_info.reason = StopReason::eStopReasonNone; +} + +void +NativeThreadLinux::SetStepping () +{ + const StateType new_state = StateType::eStateStepping; + MaybeLogStateChange (new_state); + m_state = new_state; + + m_stop_info.reason = StopReason::eStopReasonNone; +} + +void +NativeThreadLinux::SetStoppedBySignal (uint32_t signo) +{ + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD)); + if (log) + log->Printf ("NativeThreadLinux::%s called with signal 0x%" PRIx32, __FUNCTION__, signo); + + const StateType new_state = StateType::eStateStopped; + MaybeLogStateChange (new_state); + m_state = new_state; + + m_stop_info.reason = StopReason::eStopReasonSignal; + m_stop_info.details.signal.signo = signo; +} + +void +NativeThreadLinux::SetStoppedByBreakpoint () +{ + const StateType new_state = StateType::eStateStopped; + MaybeLogStateChange (new_state); + m_state = new_state; + + m_stop_info.reason = StopReason::eStopReasonSignal; + m_stop_info.details.signal.signo = SIGTRAP; +} + +bool +NativeThreadLinux::IsStoppedAtBreakpoint () +{ + // Are we stopped? If not, this can't be a breakpoint. + if (GetState () != StateType::eStateStopped) + return false; + + // Was the stop reason a signal with signal number SIGTRAP? If not, not a breakpoint. + return (m_stop_info.reason == StopReason::eStopReasonSignal) && + (m_stop_info.details.signal.signo == SIGTRAP); +} + +void +NativeThreadLinux::SetCrashedWithException (uint64_t exception_type, lldb::addr_t exception_addr) +{ + const StateType new_state = StateType::eStateCrashed; + MaybeLogStateChange (new_state); + m_state = new_state; + + m_stop_info.reason = StopReason::eStopReasonException; + m_stop_info.details.exception.type = exception_type; + m_stop_info.details.exception.data_count = 1; + m_stop_info.details.exception.data[0] = exception_addr; +} + + +void +NativeThreadLinux::SetSuspended () +{ + const StateType new_state = StateType::eStateSuspended; + MaybeLogStateChange (new_state); + m_state = new_state; + + // FIXME what makes sense here? Do we need a suspended StopReason? + m_stop_info.reason = StopReason::eStopReasonNone; +} + +void +NativeThreadLinux::SetExited () +{ + const StateType new_state = StateType::eStateExited; + MaybeLogStateChange (new_state); + m_state = new_state; + + m_stop_info.reason = StopReason::eStopReasonThreadExiting; +} + +void +NativeThreadLinux::MaybeLogStateChange (lldb::StateType new_state) +{ + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD)); + // If we're not logging, we're done. + if (!log) + return; + + // If this is a state change to the same state, we're done. + lldb::StateType old_state = m_state; + if (new_state == old_state) + return; + + NativeProcessProtocolSP m_process_sp = m_process_wp.lock (); + lldb::pid_t pid = m_process_sp ? m_process_sp->GetID () : LLDB_INVALID_PROCESS_ID; + + // Log it. + log->Printf ("NativeThreadLinux: thread (pid=%" PRIu64 ", tid=%" PRIu64 ") changing from state %s to %s", pid, GetID (), StateAsCString (old_state), StateAsCString (new_state)); +} + +static +uint32_t MaybeTranslateHostSignoToGdbSigno (uint32_t host_signo) +{ + switch (host_signo) + { + case SIGSEGV: return eGdbSignalBadAccess; + case SIGILL: return eGdbSignalBadInstruction; + case SIGFPE: return eGdbSignalArithmetic; + // NOTE: debugserver sends SIGTRAP through unmodified. Do the same here. + // case SIGTRAP: return eGdbSignalBreakpoint; + + // Nothing for eGdbSignalSoftware (0x95). + // Nothing for eGdbSignalEmulation (0x94). + + default: + // No translations. + return host_signo; + } +} + +uint32_t +NativeThreadLinux::TranslateStopInfoToGdbSignal (const ThreadStopInfo &stop_info) const +{ + switch (stop_info.reason) + { + case eStopReasonSignal: + return MaybeTranslateHostSignoToGdbSigno (stop_info.details.signal.signo); + break; + + case eStopReasonException: + // FIXME verify how we handle exception type. + return MaybeTranslateHostSignoToGdbSigno (static_cast (stop_info.details.exception.type)); + break; + + default: + assert (0 && "unexpected stop_info.reason found"); + return 0; + } +} + diff --git a/lldb/source/Plugins/Process/Linux/NativeThreadLinux.h b/lldb/source/Plugins/Process/Linux/NativeThreadLinux.h new file mode 100644 index 0000000..1a9fc4e --- /dev/null +++ b/lldb/source/Plugins/Process/Linux/NativeThreadLinux.h @@ -0,0 +1,97 @@ +//===-- NativeThreadLinux.h ----------------------------------- -*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_NativeThreadLinux_H_ +#define liblldb_NativeThreadLinux_H_ + +#include "lldb/lldb-private-forward.h" +#include "../../../Host/common/NativeThreadProtocol.h" + +namespace lldb_private +{ + class NativeProcessLinux; + + class NativeThreadLinux : public NativeThreadProtocol + { + friend class NativeProcessLinux; + + public: + NativeThreadLinux (NativeProcessLinux *process, lldb::tid_t tid); + + // --------------------------------------------------------------------- + // NativeThreadProtocol Interface + // --------------------------------------------------------------------- + const char * + GetName() override; + + lldb::StateType + GetState () override; + + bool + GetStopReason (ThreadStopInfo &stop_info) override; + + NativeRegisterContextSP + GetRegisterContext () override; + + Error + SetWatchpoint (lldb::addr_t addr, size_t size, uint32_t watch_flags, bool hardware) override; + + Error + RemoveWatchpoint (lldb::addr_t addr) override; + + uint32_t + TranslateStopInfoToGdbSignal (const ThreadStopInfo &stop_info) const override; + + private: + // --------------------------------------------------------------------- + // Interface for friend classes + // --------------------------------------------------------------------- + void + SetLaunching (); + + void + SetRunning (); + + void + SetStepping (); + + void + SetStoppedBySignal (uint32_t signo); + + void + SetStoppedByBreakpoint (); + + bool + IsStoppedAtBreakpoint (); + + void + SetCrashedWithException (uint64_t exception_type, lldb::addr_t exception_addr); + + void + SetSuspended (); + + void + SetExited (); + + // --------------------------------------------------------------------- + // Private interface + // --------------------------------------------------------------------- + void + MaybeLogStateChange (lldb::StateType new_state); + + // --------------------------------------------------------------------- + // Member Variables + // --------------------------------------------------------------------- + lldb::StateType m_state; + ThreadStopInfo m_stop_info; + NativeRegisterContextSP m_reg_context_sp; + }; +} + +#endif // #ifndef liblldb_NativeThreadLinux_H_ diff --git a/lldb/source/Plugins/Process/Linux/ProcessLinux.h b/lldb/source/Plugins/Process/Linux/ProcessLinux.h index 9f39ccc..da7eb43 100644 --- a/lldb/source/Plugins/Process/Linux/ProcessLinux.h +++ b/lldb/source/Plugins/Process/Linux/ProcessLinux.h @@ -17,10 +17,11 @@ // Other libraries and framework includes #include "lldb/Target/Process.h" -#include "LinuxSignals.h" #include "ProcessMessage.h" #include "ProcessPOSIX.h" +#include "Plugins/Process/Utility/LinuxSignals.h" + class ProcessMonitor; class ProcessLinux : @@ -107,7 +108,7 @@ public: private: /// Linux-specific signal set. - LinuxSignals m_linux_signals; + process_linux::LinuxSignals m_linux_signals; lldb_private::FileSpec *m_core_file; diff --git a/lldb/source/Plugins/Process/Linux/ProcessMonitor.cpp b/lldb/source/Plugins/Process/Linux/ProcessMonitor.cpp index 457125a..5db30d9 100644 --- a/lldb/source/Plugins/Process/Linux/ProcessMonitor.cpp +++ b/lldb/source/Plugins/Process/Linux/ProcessMonitor.cpp @@ -1228,8 +1228,12 @@ ProcessMonitor::Launch(LaunchArgs *args) // Wait for the child process to to trap on its call to execve. lldb::pid_t wpid; + ::pid_t raw_pid; int status; - if ((wpid = waitpid(pid, &status, 0)) < 0) + + raw_pid = waitpid(pid, &status, 0); + wpid = static_cast (raw_pid); + if (raw_pid < 0) { args->m_error.SetErrorToErrno(); goto FINISH; diff --git a/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp b/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp index 94892b1..031405a 100644 --- a/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp +++ b/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp @@ -934,3 +934,16 @@ ProcessPOSIX::IsAThreadRunning() } return is_running; } + +const DataBufferSP +ProcessPOSIX::GetAuxvData () +{ + // If we're the local platform, we can ask the host for auxv data. + PlatformSP platform_sp = m_target.GetPlatform (); + if (platform_sp && platform_sp->IsHost ()) + return lldb_private::Host::GetAuxvData(this); + + // Somewhat unexpected - the process is not running locally or we don't have a platform. + assert (false && "no platform or not the host - how did we get here with ProcessPOSIX?"); + return DataBufferSP (); +} diff --git a/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.h b/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.h index 7f705d3..a2f58db 100644 --- a/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.h +++ b/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.h @@ -141,6 +141,9 @@ public: virtual size_t PutSTDIN(const char *buf, size_t len, lldb_private::Error &error); + const lldb::DataBufferSP + GetAuxvData () override; + //-------------------------------------------------------------------------- // ProcessPOSIX internal API. diff --git a/lldb/source/Plugins/Process/Utility/CMakeLists.txt b/lldb/source/Plugins/Process/Utility/CMakeLists.txt index 7089f84..880b875 100644 --- a/lldb/source/Plugins/Process/Utility/CMakeLists.txt +++ b/lldb/source/Plugins/Process/Utility/CMakeLists.txt @@ -8,6 +8,8 @@ add_lldb_library(lldbPluginProcessUtility HistoryThread.cpp HistoryUnwind.cpp InferiorCallPOSIX.cpp + LinuxSignals.cpp + NativeRegisterContextLinux_x86_64.cpp RegisterContextDarwin_arm.cpp RegisterContextDarwin_arm64.cpp RegisterContextDarwin_i386.cpp diff --git a/lldb/source/Plugins/Process/Linux/LinuxSignals.cpp b/lldb/source/Plugins/Process/Utility/LinuxSignals.cpp similarity index 89% rename from lldb/source/Plugins/Process/Linux/LinuxSignals.cpp rename to lldb/source/Plugins/Process/Utility/LinuxSignals.cpp index cf8c105..f0affb7 100644 --- a/lldb/source/Plugins/Process/Linux/LinuxSignals.cpp +++ b/lldb/source/Plugins/Process/Utility/LinuxSignals.cpp @@ -15,6 +15,8 @@ // Project includes #include "LinuxSignals.h" +using namespace process_linux; + LinuxSignals::LinuxSignals() : UnixSignals() { @@ -26,6 +28,10 @@ LinuxSignals::Reset() { m_signals.clear(); + // FIXME we now need *Signals classes on systems that are different OSes (e.g. LinuxSignals + // needed on MacOSX to debug Linux from MacOSX, and similar scenarios, used by ProcessGDBRemote). These must be defined + // not based on OS includes and defines. + #define ADDSIGNAL(S, SUPPRESS, STOP, NOTIFY, DESCRIPTION) \ AddSignal(SIG ## S, "SIG" #S, #S, SUPPRESS, STOP, NOTIFY, DESCRIPTION) @@ -60,9 +66,13 @@ LinuxSignals::Reset() ADDSIGNAL(VTALRM, false, true, true, "virtual alarm"); ADDSIGNAL(PROF, false, true, true, "profiling alarm"); ADDSIGNAL(WINCH, false, true, true, "window size change"); +#ifdef SIGPOLL ADDSIGNAL(POLL, false, true, true, "pollable event"); +#endif ADDSIGNAL(IO, false, true, true, "input/output ready"); +#ifdef SIGPWR ADDSIGNAL(PWR, false, true, true, "power failure"); +#endif ADDSIGNAL(SYS, false, true, true, "invalid system call"); #undef ADDSIGNAL diff --git a/lldb/source/Plugins/Process/Linux/LinuxSignals.h b/lldb/source/Plugins/Process/Utility/LinuxSignals.h similarity index 70% rename from lldb/source/Plugins/Process/Linux/LinuxSignals.h rename to lldb/source/Plugins/Process/Utility/LinuxSignals.h index a726ecc..9645b3d 100644 --- a/lldb/source/Plugins/Process/Linux/LinuxSignals.h +++ b/lldb/source/Plugins/Process/Utility/LinuxSignals.h @@ -16,16 +16,20 @@ // Project includes #include "lldb/Target/UnixSignals.h" -/// Linux specific set of Unix signals. -class LinuxSignals - : public lldb_private::UnixSignals +namespace process_linux { -public: - LinuxSignals(); -private: - void - Reset(); -}; + /// Linux specific set of Unix signals. + class LinuxSignals + : public lldb_private::UnixSignals + { + public: + LinuxSignals(); + + private: + void + Reset(); + }; +} #endif diff --git a/lldb/source/Plugins/Process/Utility/NativeRegisterContextLinux_x86_64.cpp b/lldb/source/Plugins/Process/Utility/NativeRegisterContextLinux_x86_64.cpp new file mode 100644 index 0000000..9d7ca95 --- /dev/null +++ b/lldb/source/Plugins/Process/Utility/NativeRegisterContextLinux_x86_64.cpp @@ -0,0 +1,1040 @@ +//===-- NativeRegisterContextLinux_x86_64.cpp ---------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "NativeRegisterContextLinux_x86_64.h" + +#include "lldb/lldb-private-forward.h" +#include "lldb/Core/DataBufferHeap.h" +#include "lldb/Core/Error.h" +#include "lldb/Core/RegisterValue.h" +#include "Host/common/NativeProcessProtocol.h" +#include "Host/common/NativeThreadProtocol.h" +#include "Plugins/Process/Linux/NativeProcessLinux.h" + +using namespace lldb_private; + +// ---------------------------------------------------------------------------- +// Private namespace. +// ---------------------------------------------------------------------------- + +namespace +{ + // x86 32-bit general purpose registers. + const uint32_t + g_gpr_regnums_i386[] = + { + gpr_eax_i386, + gpr_ebx_i386, + gpr_ecx_i386, + gpr_edx_i386, + gpr_edi_i386, + gpr_esi_i386, + gpr_ebp_i386, + gpr_esp_i386, + gpr_eip_i386, + gpr_eflags_i386, + gpr_cs_i386, + gpr_fs_i386, + gpr_gs_i386, + gpr_ss_i386, + gpr_ds_i386, + gpr_es_i386, + gpr_ax_i386, + gpr_bx_i386, + gpr_cx_i386, + gpr_dx_i386, + gpr_di_i386, + gpr_si_i386, + gpr_bp_i386, + gpr_sp_i386, + gpr_ah_i386, + gpr_bh_i386, + gpr_ch_i386, + gpr_dh_i386, + gpr_al_i386, + gpr_bl_i386, + gpr_cl_i386, + gpr_dl_i386, + LLDB_INVALID_REGNUM // register sets need to end with this flag + }; + static_assert((sizeof(g_gpr_regnums_i386) / sizeof(g_gpr_regnums_i386[0])) - 1 == k_num_gpr_registers_i386, + "g_gpr_regnums_i386 has wrong number of register infos"); + + // x86 32-bit floating point registers. + const uint32_t + g_fpu_regnums_i386[] = + { + fpu_fctrl_i386, + fpu_fstat_i386, + fpu_ftag_i386, + fpu_fop_i386, + fpu_fiseg_i386, + fpu_fioff_i386, + fpu_foseg_i386, + fpu_fooff_i386, + fpu_mxcsr_i386, + fpu_mxcsrmask_i386, + fpu_st0_i386, + fpu_st1_i386, + fpu_st2_i386, + fpu_st3_i386, + fpu_st4_i386, + fpu_st5_i386, + fpu_st6_i386, + fpu_st7_i386, + fpu_mm0_i386, + fpu_mm1_i386, + fpu_mm2_i386, + fpu_mm3_i386, + fpu_mm4_i386, + fpu_mm5_i386, + fpu_mm6_i386, + fpu_mm7_i386, + fpu_xmm0_i386, + fpu_xmm1_i386, + fpu_xmm2_i386, + fpu_xmm3_i386, + fpu_xmm4_i386, + fpu_xmm5_i386, + fpu_xmm6_i386, + fpu_xmm7_i386, + LLDB_INVALID_REGNUM // register sets need to end with this flag + }; + static_assert((sizeof(g_fpu_regnums_i386) / sizeof(g_fpu_regnums_i386[0])) - 1 == k_num_fpr_registers_i386, + "g_fpu_regnums_i386 has wrong number of register infos"); + + // x86 32-bit AVX registers. + const uint32_t + g_avx_regnums_i386[] = + { + fpu_ymm0_i386, + fpu_ymm1_i386, + fpu_ymm2_i386, + fpu_ymm3_i386, + fpu_ymm4_i386, + fpu_ymm5_i386, + fpu_ymm6_i386, + fpu_ymm7_i386, + LLDB_INVALID_REGNUM // register sets need to end with this flag + }; + static_assert((sizeof(g_avx_regnums_i386) / sizeof(g_avx_regnums_i386[0])) - 1 == k_num_avx_registers_i386, + " g_avx_regnums_i386 has wrong number of register infos"); + + // x86 64-bit general purpose registers. + static const + uint32_t g_gpr_regnums_x86_64[] = + { + gpr_rax_x86_64, + gpr_rbx_x86_64, + gpr_rcx_x86_64, + gpr_rdx_x86_64, + gpr_rdi_x86_64, + gpr_rsi_x86_64, + gpr_rbp_x86_64, + gpr_rsp_x86_64, + gpr_r8_x86_64, + gpr_r9_x86_64, + gpr_r10_x86_64, + gpr_r11_x86_64, + gpr_r12_x86_64, + gpr_r13_x86_64, + gpr_r14_x86_64, + gpr_r15_x86_64, + gpr_rip_x86_64, + gpr_rflags_x86_64, + gpr_cs_x86_64, + gpr_fs_x86_64, + gpr_gs_x86_64, + gpr_ss_x86_64, + gpr_ds_x86_64, + gpr_es_x86_64, + gpr_eax_x86_64, + gpr_ebx_x86_64, + gpr_ecx_x86_64, + gpr_edx_x86_64, + gpr_edi_x86_64, + gpr_esi_x86_64, + gpr_ebp_x86_64, + gpr_esp_x86_64, + gpr_r8d_x86_64, // Low 32 bits or r8 + gpr_r9d_x86_64, // Low 32 bits or r9 + gpr_r10d_x86_64, // Low 32 bits or r10 + gpr_r11d_x86_64, // Low 32 bits or r11 + gpr_r12d_x86_64, // Low 32 bits or r12 + gpr_r13d_x86_64, // Low 32 bits or r13 + gpr_r14d_x86_64, // Low 32 bits or r14 + gpr_r15d_x86_64, // Low 32 bits or r15 + gpr_ax_x86_64, + gpr_bx_x86_64, + gpr_cx_x86_64, + gpr_dx_x86_64, + gpr_di_x86_64, + gpr_si_x86_64, + gpr_bp_x86_64, + gpr_sp_x86_64, + gpr_r8w_x86_64, // Low 16 bits or r8 + gpr_r9w_x86_64, // Low 16 bits or r9 + gpr_r10w_x86_64, // Low 16 bits or r10 + gpr_r11w_x86_64, // Low 16 bits or r11 + gpr_r12w_x86_64, // Low 16 bits or r12 + gpr_r13w_x86_64, // Low 16 bits or r13 + gpr_r14w_x86_64, // Low 16 bits or r14 + gpr_r15w_x86_64, // Low 16 bits or r15 + gpr_ah_x86_64, + gpr_bh_x86_64, + gpr_ch_x86_64, + gpr_dh_x86_64, + gpr_al_x86_64, + gpr_bl_x86_64, + gpr_cl_x86_64, + gpr_dl_x86_64, + gpr_dil_x86_64, + gpr_sil_x86_64, + gpr_bpl_x86_64, + gpr_spl_x86_64, + gpr_r8l_x86_64, // Low 8 bits or r8 + gpr_r9l_x86_64, // Low 8 bits or r9 + gpr_r10l_x86_64, // Low 8 bits or r10 + gpr_r11l_x86_64, // Low 8 bits or r11 + gpr_r12l_x86_64, // Low 8 bits or r12 + gpr_r13l_x86_64, // Low 8 bits or r13 + gpr_r14l_x86_64, // Low 8 bits or r14 + gpr_r15l_x86_64, // Low 8 bits or r15 + LLDB_INVALID_REGNUM // register sets need to end with this flag + }; + static_assert((sizeof(g_gpr_regnums_x86_64) / sizeof(g_gpr_regnums_x86_64[0])) - 1 == k_num_gpr_registers_x86_64, + "g_gpr_regnums_x86_64 has wrong number of register infos"); + + // x86 64-bit floating point registers. + static const uint32_t + g_fpu_regnums_x86_64[] = + { + fpu_fctrl_x86_64, + fpu_fstat_x86_64, + fpu_ftag_x86_64, + fpu_fop_x86_64, + fpu_fiseg_x86_64, + fpu_fioff_x86_64, + fpu_foseg_x86_64, + fpu_fooff_x86_64, + fpu_mxcsr_x86_64, + fpu_mxcsrmask_x86_64, + fpu_st0_x86_64, + fpu_st1_x86_64, + fpu_st2_x86_64, + fpu_st3_x86_64, + fpu_st4_x86_64, + fpu_st5_x86_64, + fpu_st6_x86_64, + fpu_st7_x86_64, + fpu_mm0_x86_64, + fpu_mm1_x86_64, + fpu_mm2_x86_64, + fpu_mm3_x86_64, + fpu_mm4_x86_64, + fpu_mm5_x86_64, + fpu_mm6_x86_64, + fpu_mm7_x86_64, + fpu_xmm0_x86_64, + fpu_xmm1_x86_64, + fpu_xmm2_x86_64, + fpu_xmm3_x86_64, + fpu_xmm4_x86_64, + fpu_xmm5_x86_64, + fpu_xmm6_x86_64, + fpu_xmm7_x86_64, + fpu_xmm8_x86_64, + fpu_xmm9_x86_64, + fpu_xmm10_x86_64, + fpu_xmm11_x86_64, + fpu_xmm12_x86_64, + fpu_xmm13_x86_64, + fpu_xmm14_x86_64, + fpu_xmm15_x86_64, + LLDB_INVALID_REGNUM // register sets need to end with this flag + }; + static_assert((sizeof(g_fpu_regnums_x86_64) / sizeof(g_fpu_regnums_x86_64[0])) - 1 == k_num_fpr_registers_x86_64, + "g_fpu_regnums_x86_64 has wrong number of register infos"); + + // x86 64-bit AVX registers. + static const uint32_t + g_avx_regnums_x86_64[] = + { + fpu_ymm0_x86_64, + fpu_ymm1_x86_64, + fpu_ymm2_x86_64, + fpu_ymm3_x86_64, + fpu_ymm4_x86_64, + fpu_ymm5_x86_64, + fpu_ymm6_x86_64, + fpu_ymm7_x86_64, + fpu_ymm8_x86_64, + fpu_ymm9_x86_64, + fpu_ymm10_x86_64, + fpu_ymm11_x86_64, + fpu_ymm12_x86_64, + fpu_ymm13_x86_64, + fpu_ymm14_x86_64, + fpu_ymm15_x86_64, + LLDB_INVALID_REGNUM // register sets need to end with this flag + }; + static_assert((sizeof(g_avx_regnums_x86_64) / sizeof(g_avx_regnums_x86_64[0])) - 1 == k_num_avx_registers_x86_64, + "g_avx_regnums_x86_64 has wrong number of register infos"); + + // Number of register sets provided by this context. + enum + { + k_num_extended_register_sets = 1, + k_num_register_sets = 3 + }; + + // Register sets for x86 32-bit. + static const RegisterSet + g_reg_sets_i386[k_num_register_sets] = + { + { "General Purpose Registers", "gpr", k_num_gpr_registers_i386, g_gpr_regnums_i386 }, + { "Floating Point Registers", "fpu", k_num_fpr_registers_i386, g_fpu_regnums_i386 }, + { "Advanced Vector Extensions", "avx", k_num_avx_registers_i386, g_avx_regnums_i386 } + }; + + // Register sets for x86 64-bit. + static const RegisterSet + g_reg_sets_x86_64[k_num_register_sets] = + { + { "General Purpose Registers", "gpr", k_num_gpr_registers_x86_64, g_gpr_regnums_x86_64 }, + { "Floating Point Registers", "fpu", k_num_fpr_registers_x86_64, g_fpu_regnums_x86_64 }, + { "Advanced Vector Extensions", "avx", k_num_avx_registers_x86_64, g_avx_regnums_x86_64 } + }; +} + +#define REG_CONTEXT_SIZE (GetRegisterInfoInterface ().GetGPRSize () + sizeof(FPR)) + +// ---------------------------------------------------------------------------- +// Required ptrace defines. +// ---------------------------------------------------------------------------- + +// Support ptrace extensions even when compiled without required kernel support +#ifndef NT_X86_XSTATE +#define NT_X86_XSTATE 0x202 +#endif + +// ---------------------------------------------------------------------------- +// NativeRegisterContextLinux_x86_64 members. +// ---------------------------------------------------------------------------- + +NativeRegisterContextLinux_x86_64::NativeRegisterContextLinux_x86_64 (NativeThreadProtocol &native_thread, uint32_t concrete_frame_idx, RegisterInfoInterface *reg_info_interface_p) : + NativeRegisterContextRegisterInfo (native_thread, concrete_frame_idx, reg_info_interface_p), + m_fpr_type (eFPRTypeNotValid), + m_fpr (), + m_iovec (), + m_ymm_set (), + m_reg_info (), + m_gpr_x86_64 () +{ + // Set up data about ranges of valid registers. + switch (reg_info_interface_p->GetTargetArchitecture ().GetMachine ()) + { + case llvm::Triple::x86: + m_reg_info.num_registers = k_num_registers_i386; + m_reg_info.num_gpr_registers = k_num_gpr_registers_i386; + m_reg_info.num_fpr_registers = k_num_fpr_registers_i386; + m_reg_info.num_avx_registers = k_num_avx_registers_i386; + m_reg_info.last_gpr = k_last_gpr_i386; + m_reg_info.first_fpr = k_first_fpr_i386; + m_reg_info.last_fpr = k_last_fpr_i386; + m_reg_info.first_st = fpu_st0_i386; + m_reg_info.last_st = fpu_st7_i386; + m_reg_info.first_mm = fpu_mm0_i386; + m_reg_info.last_mm = fpu_mm7_i386; + m_reg_info.first_xmm = fpu_xmm0_i386; + m_reg_info.last_xmm = fpu_xmm7_i386; + m_reg_info.first_ymm = fpu_ymm0_i386; + m_reg_info.last_ymm = fpu_ymm7_i386; + m_reg_info.first_dr = dr0_i386; + m_reg_info.gpr_flags = gpr_eflags_i386; + break; + case llvm::Triple::x86_64: + m_reg_info.num_registers = k_num_registers_x86_64; + m_reg_info.num_gpr_registers = k_num_gpr_registers_x86_64; + m_reg_info.num_fpr_registers = k_num_fpr_registers_x86_64; + m_reg_info.num_avx_registers = k_num_avx_registers_x86_64; + m_reg_info.last_gpr = k_last_gpr_x86_64; + m_reg_info.first_fpr = k_first_fpr_x86_64; + m_reg_info.last_fpr = k_last_fpr_x86_64; + m_reg_info.first_st = fpu_st0_x86_64; + m_reg_info.last_st = fpu_st7_x86_64; + m_reg_info.first_mm = fpu_mm0_x86_64; + m_reg_info.last_mm = fpu_mm7_x86_64; + m_reg_info.first_xmm = fpu_xmm0_x86_64; + m_reg_info.last_xmm = fpu_xmm15_x86_64; + m_reg_info.first_ymm = fpu_ymm0_x86_64; + m_reg_info.last_ymm = fpu_ymm15_x86_64; + m_reg_info.first_dr = dr0_x86_64; + m_reg_info.gpr_flags = gpr_rflags_x86_64; + break; + default: + assert(false && "Unhandled target architecture."); + break; + } + + // Initialize m_iovec to point to the buffer and buffer size + // using the conventions of Berkeley style UIO structures, as required + // by PTRACE extensions. + m_iovec.iov_base = &m_fpr.xstate.xsave; + m_iovec.iov_len = sizeof(m_fpr.xstate.xsave); + + // Clear out the FPR state. + ::memset(&m_fpr, 0, sizeof(FPR)); +} + +// CONSIDER after local and llgs debugging are merged, register set support can +// be moved into a base x86-64 class with IsRegisterSetAvailable made virtual. +uint32_t +NativeRegisterContextLinux_x86_64::GetRegisterSetCount () const +{ + uint32_t sets = 0; + for (uint32_t set_index = 0; set_index < k_num_register_sets; ++set_index) + { + if (IsRegisterSetAvailable (set_index)) + ++sets; + } + + return sets; +} + +const lldb_private::RegisterSet * +NativeRegisterContextLinux_x86_64::GetRegisterSet (uint32_t set_index) const +{ + if (!IsRegisterSetAvailable (set_index)) + return nullptr; + + switch (GetRegisterInfoInterface ().GetTargetArchitecture ().GetMachine ()) + { + case llvm::Triple::x86: + return &g_reg_sets_i386[set_index]; + case llvm::Triple::x86_64: + return &g_reg_sets_x86_64[set_index]; + default: + assert (false && "Unhandled target architecture."); + return nullptr; + } + + return nullptr; +} + +lldb_private::Error +NativeRegisterContextLinux_x86_64::ReadRegisterRaw (uint32_t reg_index, RegisterValue ®_value) +{ + Error error; + const RegisterInfo *const reg_info = GetRegisterInfoAtIndex (reg_index); + if (!reg_info) + { + error.SetErrorStringWithFormat ("register %" PRIu32 " not found", reg_index); + return error; + } + + NativeProcessProtocolSP process_sp (m_thread.GetProcess ()); + if (!process_sp) + { + error.SetErrorString ("NativeProcessProtocol is NULL"); + return error; + } + + NativeProcessLinux *const process_p = reinterpret_cast (process_sp.get ()); + if (!process_p->ReadRegisterValue(m_thread.GetID(), + reg_info->byte_offset, + reg_info->name, + reg_info->byte_size, + reg_value)) + error.SetErrorString ("NativeProcessLinux::ReadRegisterValue() failed"); + + return error; +} + +lldb_private::Error +NativeRegisterContextLinux_x86_64::ReadRegister (const RegisterInfo *reg_info, RegisterValue ®_value) +{ + Error error; + + if (!reg_info) + { + error.SetErrorString ("reg_info NULL"); + return error; + } + + const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; + if (reg == LLDB_INVALID_REGNUM) + { + // This is likely an internal register for lldb use only and should not be directly queried. + error.SetErrorStringWithFormat ("register \"%s\" is an internal-only lldb register, cannot read directly", reg_info->name); + return error; + } + + if (IsFPR(reg, GetFPRType())) + { + if (!ReadFPR()) + { + error.SetErrorString ("failed to read floating point register"); + return error; + } + } + else + { + uint32_t full_reg = reg; + bool is_subreg = reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM); + + if (is_subreg) + { + // Read the full aligned 64-bit register. + full_reg = reg_info->invalidate_regs[0]; + } + + error = ReadRegisterRaw(full_reg, reg_value); + + if (error.Success ()) + { + // If our read was not aligned (for ah,bh,ch,dh), shift our returned value one byte to the right. + if (is_subreg && (reg_info->byte_offset & 0x1)) + reg_value.SetUInt64(reg_value.GetAsUInt64() >> 8); + + // If our return byte size was greater than the return value reg size, then + // use the type specified by reg_info rather than the uint64_t default + if (reg_value.GetByteSize() > reg_info->byte_size) + reg_value.SetType(reg_info); + } + return error; + } + + if (reg_info->encoding == lldb::eEncodingVector) + { + lldb::ByteOrder byte_order = GetByteOrder(); + + if (byte_order != lldb::eByteOrderInvalid) + { + if (reg >= m_reg_info.first_st && reg <= m_reg_info.last_st) + reg_value.SetBytes(m_fpr.xstate.fxsave.stmm[reg - m_reg_info.first_st].bytes, reg_info->byte_size, byte_order); + if (reg >= m_reg_info.first_mm && reg <= m_reg_info.last_mm) + reg_value.SetBytes(m_fpr.xstate.fxsave.stmm[reg - m_reg_info.first_mm].bytes, reg_info->byte_size, byte_order); + if (reg >= m_reg_info.first_xmm && reg <= m_reg_info.last_xmm) + reg_value.SetBytes(m_fpr.xstate.fxsave.xmm[reg - m_reg_info.first_xmm].bytes, reg_info->byte_size, byte_order); + if (reg >= m_reg_info.first_ymm && reg <= m_reg_info.last_ymm) + { + // Concatenate ymm using the register halves in xmm.bytes and ymmh.bytes + if (GetFPRType() == eFPRTypeXSAVE && CopyXSTATEtoYMM(reg, byte_order)) + reg_value.SetBytes(m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes, reg_info->byte_size, byte_order); + else + { + error.SetErrorString ("failed to copy ymm register value"); + return error; + } + } + + if (reg_value.GetType() != RegisterValue::eTypeBytes) + error.SetErrorString ("write failed - type was expected to be RegisterValue::eTypeBytes"); + + return error; + } + + error.SetErrorString ("byte order is invalid"); + return error; + } + + // Get pointer to m_fpr.xstate.fxsave variable and set the data from it. + assert (reg_info->byte_offset < sizeof(m_fpr)); + uint8_t *src = (uint8_t *)&m_fpr + reg_info->byte_offset; + switch (reg_info->byte_size) + { + case 2: + reg_value.SetUInt16(*(uint16_t *)src); + break; + case 4: + reg_value.SetUInt32(*(uint32_t *)src); + break; + case 8: + reg_value.SetUInt64(*(uint64_t *)src); + break; + default: + assert(false && "Unhandled data size."); + error.SetErrorStringWithFormat ("unhandled byte size: %" PRIu32, reg_info->byte_size); + break; + } + + return error; +} + +lldb_private::Error +NativeRegisterContextLinux_x86_64::WriteRegister(const uint32_t reg, + const RegisterValue &value) +{ + Error error; + + uint32_t reg_to_write = reg; + RegisterValue value_to_write = value; + + // Check if this is a subregister of a full register. + const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg); + if (reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM)) + { + RegisterValue full_value; + uint32_t full_reg = reg_info->invalidate_regs[0]; + const RegisterInfo *full_reg_info = GetRegisterInfoAtIndex(full_reg); + + // Read the full register. + error = ReadRegister(full_reg_info, full_value); + if (error.Fail ()) + return error; + + lldb::ByteOrder byte_order = GetByteOrder(); + uint8_t dst[RegisterValue::kMaxRegisterByteSize]; + + // Get the bytes for the full register. + const uint32_t dest_size = full_value.GetAsMemoryData (full_reg_info, + dst, + sizeof(dst), + byte_order, + error); + if (error.Success() && dest_size) + { + uint8_t src[RegisterValue::kMaxRegisterByteSize]; + + // Get the bytes for the source data. + const uint32_t src_size = value.GetAsMemoryData (reg_info, src, sizeof(src), byte_order, error); + if (error.Success() && src_size && (src_size < dest_size)) + { + // Copy the src bytes to the destination. + memcpy (dst + (reg_info->byte_offset & 0x1), src, src_size); + // Set this full register as the value to write. + value_to_write.SetBytes(dst, full_value.GetByteSize(), byte_order); + value_to_write.SetType(full_reg_info); + reg_to_write = full_reg; + } + } + } + + + NativeProcessProtocolSP process_sp (m_thread.GetProcess ()); + if (!process_sp) + { + error.SetErrorString ("NativeProcessProtocol is NULL"); + return error; + } + + const RegisterInfo *const register_to_write_info_p = GetRegisterInfoAtIndex (reg_to_write); + assert (register_to_write_info_p && "register to write does not have valid RegisterInfo"); + if (!register_to_write_info_p) + { + error.SetErrorStringWithFormat ("NativeRegisterContextLinux_x86_64::%s failed to get RegisterInfo for write register index %" PRIu32, __FUNCTION__, reg_to_write); + return error; + } + + NativeProcessLinux *const process_p = reinterpret_cast (process_sp.get ()); + if (!process_p->WriteRegisterValue(m_thread.GetID(), + register_to_write_info_p->byte_offset, + register_to_write_info_p->name, + value_to_write)) + error.SetErrorString ("NativeProcessLinux::WriteRegisterValue() failed"); + + return error; +} + +lldb_private::Error +NativeRegisterContextLinux_x86_64::WriteRegister (const RegisterInfo *reg_info, const RegisterValue ®_value) +{ + assert (reg_info && "reg_info is null"); + + const uint32_t reg_index = reg_info->kinds[lldb::eRegisterKindLLDB]; + if (reg_index == LLDB_INVALID_REGNUM) + return Error ("no lldb regnum for %s", reg_info && reg_info->name ? reg_info->name : ""); + + if (IsGPR(reg_index)) + return WriteRegister(reg_index, reg_value); + + if (IsFPR(reg_index, GetFPRType())) + { + if (reg_info->encoding == lldb::eEncodingVector) + { + if (reg_index >= m_reg_info.first_st && reg_index <= m_reg_info.last_st) + ::memcpy (m_fpr.xstate.fxsave.stmm[reg_index - m_reg_info.first_st].bytes, reg_value.GetBytes(), reg_value.GetByteSize()); + + if (reg_index >= m_reg_info.first_mm && reg_index <= m_reg_info.last_mm) + ::memcpy (m_fpr.xstate.fxsave.stmm[reg_index - m_reg_info.first_mm].bytes, reg_value.GetBytes(), reg_value.GetByteSize()); + + if (reg_index >= m_reg_info.first_xmm && reg_index <= m_reg_info.last_xmm) + ::memcpy (m_fpr.xstate.fxsave.xmm[reg_index - m_reg_info.first_xmm].bytes, reg_value.GetBytes(), reg_value.GetByteSize()); + + if (reg_index >= m_reg_info.first_ymm && reg_index <= m_reg_info.last_ymm) + { + if (GetFPRType() != eFPRTypeXSAVE) + return Error ("target processor does not support AVX"); + + // Store ymm register content, and split into the register halves in xmm.bytes and ymmh.bytes + ::memcpy (m_ymm_set.ymm[reg_index - m_reg_info.first_ymm].bytes, reg_value.GetBytes(), reg_value.GetByteSize()); + if (!CopyYMMtoXSTATE(reg_index, GetByteOrder())) + return Error ("CopyYMMtoXSTATE() failed"); + } + } + else + { + // Get pointer to m_fpr.xstate.fxsave variable and set the data to it. + assert (reg_info->byte_offset < sizeof(m_fpr)); + uint8_t *dst = (uint8_t *)&m_fpr + reg_info->byte_offset; + switch (reg_info->byte_size) + { + case 2: + *(uint16_t *)dst = reg_value.GetAsUInt16(); + break; + case 4: + *(uint32_t *)dst = reg_value.GetAsUInt32(); + break; + case 8: + *(uint64_t *)dst = reg_value.GetAsUInt64(); + break; + default: + assert(false && "Unhandled data size."); + return Error ("unhandled register data size %" PRIu32, reg_info->byte_size); + } + } + + if (WriteFPR()) + { + if (IsAVX(reg_index)) + { + if (!CopyYMMtoXSTATE(reg_index, GetByteOrder())) + return Error ("CopyYMMtoXSTATE() failed"); + } + return Error (); + } + } + return Error ("failed - register wasn't recognized to be a GPR or an FPR, write strategy unknown"); +} + +lldb_private::Error +NativeRegisterContextLinux_x86_64::ReadAllRegisterValues (lldb::DataBufferSP &data_sp) +{ + Error error; + + data_sp.reset (new DataBufferHeap (REG_CONTEXT_SIZE, 0)); + if (!data_sp) + { + error.SetErrorStringWithFormat ("failed to allocate DataBufferHeap instance of size %" PRIu64, REG_CONTEXT_SIZE); + return error; + } + + if (!ReadGPR ()) + { + error.SetErrorString ("ReadGPR() failed"); + return error; + } + + if (!ReadFPR ()) + { + error.SetErrorString ("ReadFPR() failed"); + return error; + } + + uint8_t *dst = data_sp->GetBytes (); + if (dst == nullptr) + { + error.SetErrorStringWithFormat ("DataBufferHeap instance of size %" PRIu64 " returned a null pointer", REG_CONTEXT_SIZE); + return error; + } + + ::memcpy (dst, &m_gpr_x86_64, GetRegisterInfoInterface ().GetGPRSize ()); + dst += GetRegisterInfoInterface ().GetGPRSize (); + if (GetFPRType () == eFPRTypeFXSAVE) + ::memcpy (dst, &m_fpr.xstate.fxsave, sizeof(m_fpr.xstate.fxsave)); + else if (GetFPRType () == eFPRTypeXSAVE) + { + lldb::ByteOrder byte_order = GetByteOrder (); + + // Assemble the YMM register content from the register halves. + for (uint32_t reg = m_reg_info.first_ymm; reg <= m_reg_info.last_ymm; ++reg) + { + if (!CopyXSTATEtoYMM (reg, byte_order)) + { + error.SetErrorStringWithFormat ("NativeRegisterContextLinux_x86_64::%s CopyXSTATEtoYMM() failed for reg num %" PRIu32, __FUNCTION__, reg); + return error; + } + } + + // Copy the extended register state including the assembled ymm registers. + ::memcpy (dst, &m_fpr, sizeof (m_fpr)); + } + else + { + assert (false && "how do we save the floating point registers?"); + error.SetErrorString ("unsure how to save the floating point registers"); + } + + return error; +} + +lldb_private::Error +NativeRegisterContextLinux_x86_64::WriteAllRegisterValues (const lldb::DataBufferSP &data_sp) +{ + Error error; + + if (!data_sp) + { + error.SetErrorStringWithFormat ("NativeRegisterContextLinux_x86_64::%s invalid data_sp provided", __FUNCTION__); + return error; + } + + if (data_sp->GetByteSize () != REG_CONTEXT_SIZE) + { + error.SetErrorStringWithFormat ("NativeRegisterContextLinux_x86_64::%s data_sp contained mismatched data size, expected %" PRIu64 ", actual %" PRIu64, __FUNCTION__, REG_CONTEXT_SIZE, data_sp->GetByteSize ()); + return error; + } + + + uint8_t *src = data_sp->GetBytes (); + if (src == nullptr) + { + error.SetErrorStringWithFormat ("NativeRegisterContextLinux_x86_64::%s DataBuffer::GetBytes() returned a null pointer", __FUNCTION__); + return error; + } + ::memcpy (&m_gpr_x86_64, src, GetRegisterInfoInterface ().GetGPRSize ()); + + if (!WriteGPR ()) + { + error.SetErrorStringWithFormat ("NativeRegisterContextLinux_x86_64::%s WriteGPR() failed", __FUNCTION__); + return error; + } + + src += GetRegisterInfoInterface ().GetGPRSize (); + if (GetFPRType () == eFPRTypeFXSAVE) + ::memcpy (&m_fpr.xstate.fxsave, src, sizeof(m_fpr.xstate.fxsave)); + else if (GetFPRType () == eFPRTypeXSAVE) + ::memcpy (&m_fpr.xstate.xsave, src, sizeof(m_fpr.xstate.xsave)); + + if (!WriteFPR ()) + { + error.SetErrorStringWithFormat ("NativeRegisterContextLinux_x86_64::%s WriteFPR() failed", __FUNCTION__); + return error; + } + + if (GetFPRType() == eFPRTypeXSAVE) + { + lldb::ByteOrder byte_order = GetByteOrder(); + + // Parse the YMM register content from the register halves. + for (uint32_t reg = m_reg_info.first_ymm; reg <= m_reg_info.last_ymm; ++reg) + { + if (!CopyYMMtoXSTATE (reg, byte_order)) + { + error.SetErrorStringWithFormat ("NativeRegisterContextLinux_x86_64::%s CopyYMMtoXSTATE() failed for reg num %" PRIu32, __FUNCTION__, reg); + return error; + } + } + } + + return error; +} + +bool +NativeRegisterContextLinux_x86_64::IsRegisterSetAvailable (uint32_t set_index) const +{ + // Note: Extended register sets are assumed to be at the end of g_reg_sets. + uint32_t num_sets = k_num_register_sets - k_num_extended_register_sets; + + if (GetFPRType () == eFPRTypeXSAVE) + { + // AVX is the first extended register set. + ++num_sets; + } + return (set_index < num_sets); +} + +lldb::ByteOrder +NativeRegisterContextLinux_x86_64::GetByteOrder() const +{ + // Get the target process whose privileged thread was used for the register read. + lldb::ByteOrder byte_order = lldb::eByteOrderInvalid; + + NativeProcessProtocolSP process_sp (m_thread.GetProcess ()); + if (!process_sp) + return byte_order; + + if (!process_sp->GetByteOrder (byte_order)) + { + // FIXME log here + } + + return byte_order; +} + +bool +NativeRegisterContextLinux_x86_64::IsGPR(uint32_t reg_index) const +{ + // GPRs come first. + return reg_index <= m_reg_info.last_gpr; +} + +NativeRegisterContextLinux_x86_64::FPRType +NativeRegisterContextLinux_x86_64::GetFPRType () const +{ + if (m_fpr_type == eFPRTypeNotValid) + { + // TODO: Use assembly to call cpuid on the inferior and query ebx or ecx. + + // Try and see if AVX register retrieval works. + m_fpr_type = eFPRTypeXSAVE; + if (!const_cast (this)->ReadFPR ()) + { + // Fall back to general floating point with no AVX support. + m_fpr_type = eFPRTypeFXSAVE; + } + } + + return m_fpr_type; +} + +bool +NativeRegisterContextLinux_x86_64::IsFPR(uint32_t reg_index) const +{ + return (m_reg_info.first_fpr <= reg_index && reg_index <= m_reg_info.last_fpr); +} + +bool +NativeRegisterContextLinux_x86_64::IsFPR(uint32_t reg_index, FPRType fpr_type) const +{ + bool generic_fpr = IsFPR(reg_index); + + if (fpr_type == eFPRTypeXSAVE) + return generic_fpr || IsAVX(reg_index); + return generic_fpr; +} + +bool +NativeRegisterContextLinux_x86_64::WriteFPR() +{ + NativeProcessProtocolSP process_sp (m_thread.GetProcess ()); + if (!process_sp) + return false; + NativeProcessLinux *const process_p = reinterpret_cast (process_sp.get ()); + + if (GetFPRType() == eFPRTypeFXSAVE) + return process_p->WriteFPR (m_thread.GetID (), &m_fpr.xstate.fxsave, sizeof (m_fpr.xstate.fxsave)); + + if (GetFPRType() == eFPRTypeXSAVE) + return process_p->WriteRegisterSet (m_thread.GetID (), &m_iovec, sizeof (m_fpr.xstate.xsave), NT_X86_XSTATE); + return false; +} + +bool +NativeRegisterContextLinux_x86_64::IsAVX(uint32_t reg_index) const +{ + return (m_reg_info.first_ymm <= reg_index && reg_index <= m_reg_info.last_ymm); +} + +bool +NativeRegisterContextLinux_x86_64::CopyXSTATEtoYMM (uint32_t reg_index, lldb::ByteOrder byte_order) +{ + if (!IsAVX (reg_index)) + return false; + + if (byte_order == lldb::eByteOrderLittle) + { + ::memcpy (m_ymm_set.ymm[reg_index - m_reg_info.first_ymm].bytes, + m_fpr.xstate.fxsave.xmm[reg_index - m_reg_info.first_ymm].bytes, + sizeof (XMMReg)); + ::memcpy (m_ymm_set.ymm[reg_index - m_reg_info.first_ymm].bytes + sizeof (XMMReg), + m_fpr.xstate.xsave.ymmh[reg_index - m_reg_info.first_ymm].bytes, + sizeof (YMMHReg)); + return true; + } + + if (byte_order == lldb::eByteOrderBig) + { + ::memcpy(m_ymm_set.ymm[reg_index - m_reg_info.first_ymm].bytes + sizeof (XMMReg), + m_fpr.xstate.fxsave.xmm[reg_index - m_reg_info.first_ymm].bytes, + sizeof (XMMReg)); + ::memcpy(m_ymm_set.ymm[reg_index - m_reg_info.first_ymm].bytes, + m_fpr.xstate.xsave.ymmh[reg_index - m_reg_info.first_ymm].bytes, + sizeof (YMMHReg)); + return true; + } + return false; // unsupported or invalid byte order + +} + +bool +NativeRegisterContextLinux_x86_64::CopyYMMtoXSTATE(uint32_t reg, lldb::ByteOrder byte_order) +{ + if (!IsAVX(reg)) + return false; + + if (byte_order == lldb::eByteOrderLittle) + { + ::memcpy(m_fpr.xstate.fxsave.xmm[reg - m_reg_info.first_ymm].bytes, + m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes, + sizeof(XMMReg)); + ::memcpy(m_fpr.xstate.xsave.ymmh[reg - m_reg_info.first_ymm].bytes, + m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes + sizeof(XMMReg), + sizeof(YMMHReg)); + return true; + } + + if (byte_order == lldb::eByteOrderBig) + { + ::memcpy(m_fpr.xstate.fxsave.xmm[reg - m_reg_info.first_ymm].bytes, + m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes + sizeof(XMMReg), + sizeof(XMMReg)); + ::memcpy(m_fpr.xstate.xsave.ymmh[reg - m_reg_info.first_ymm].bytes, + m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes, + sizeof(YMMHReg)); + return true; + } + return false; // unsupported or invalid byte order +} + +bool +NativeRegisterContextLinux_x86_64::ReadFPR () +{ + NativeProcessProtocolSP process_sp (m_thread.GetProcess ()); + if (!process_sp) + return false; + NativeProcessLinux *const process_p = reinterpret_cast (process_sp.get ()); + + const FPRType fpr_type = GetFPRType (); + switch (fpr_type) + { + case FPRType::eFPRTypeFXSAVE: + return process_p->ReadFPR (m_thread.GetID (), &m_fpr.xstate.fxsave, sizeof (m_fpr.xstate.fxsave)); + + case FPRType::eFPRTypeXSAVE: + return process_p->ReadRegisterSet (m_thread.GetID (), &m_iovec, sizeof (m_fpr.xstate.xsave), NT_X86_XSTATE); + + default: + return false; + } +} + +bool +NativeRegisterContextLinux_x86_64::ReadGPR() +{ + NativeProcessProtocolSP process_sp (m_thread.GetProcess ()); + if (!process_sp) + return false; + NativeProcessLinux *const process_p = reinterpret_cast (process_sp.get ()); + + return process_p->ReadGPR (m_thread.GetID (), &m_gpr_x86_64, GetRegisterInfoInterface ().GetGPRSize ()); +} + +bool +NativeRegisterContextLinux_x86_64::WriteGPR() +{ + NativeProcessProtocolSP process_sp (m_thread.GetProcess ()); + if (!process_sp) + return false; + NativeProcessLinux *const process_p = reinterpret_cast (process_sp.get ()); + + return process_p->WriteGPR (m_thread.GetID (), &m_gpr_x86_64, GetRegisterInfoInterface ().GetGPRSize ()); +} + diff --git a/lldb/source/Plugins/Process/Utility/NativeRegisterContextLinux_x86_64.h b/lldb/source/Plugins/Process/Utility/NativeRegisterContextLinux_x86_64.h new file mode 100644 index 0000000..d7353c08 --- /dev/null +++ b/lldb/source/Plugins/Process/Utility/NativeRegisterContextLinux_x86_64.h @@ -0,0 +1,135 @@ +//===-- NativeRegisterContextLinux_x86_64.h ---------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + + +#ifndef lldb_NativeRegisterContextLinux_x86_64_h +#define lldb_NativeRegisterContextLinux_x86_64_h + +#include "lldb/Target/NativeRegisterContextRegisterInfo.h" +#include "RegisterContext_x86.h" +#include "lldb-x86-register-enums.h" + +namespace lldb_private +{ + class NativeProcessLinux; + + class NativeRegisterContextLinux_x86_64 : public NativeRegisterContextRegisterInfo + { + public: + NativeRegisterContextLinux_x86_64 (NativeThreadProtocol &native_thread, uint32_t concrete_frame_idx, RegisterInfoInterface *reg_info_interface_p); + + uint32_t + GetRegisterSetCount () const override; + + const RegisterSet * + GetRegisterSet (uint32_t set_index) const override; + + Error + ReadRegister (const RegisterInfo *reg_info, RegisterValue ®_value) override; + + Error + WriteRegister (const RegisterInfo *reg_info, const RegisterValue ®_value) override; + + Error + ReadAllRegisterValues (lldb::DataBufferSP &data_sp) override; + + Error + WriteAllRegisterValues (const lldb::DataBufferSP &data_sp) override; + + private: + + // Private member types. + enum FPRType + { + eFPRTypeNotValid = 0, + eFPRTypeFXSAVE, + eFPRTypeXSAVE + }; + + // Info about register ranges. + struct RegInfo + { + uint32_t num_registers; + uint32_t num_gpr_registers; + uint32_t num_fpr_registers; + uint32_t num_avx_registers; + + uint32_t last_gpr; + uint32_t first_fpr; + uint32_t last_fpr; + + uint32_t first_st; + uint32_t last_st; + uint32_t first_mm; + uint32_t last_mm; + uint32_t first_xmm; + uint32_t last_xmm; + uint32_t first_ymm; + uint32_t last_ymm; + + uint32_t first_dr; + uint32_t gpr_flags; + }; + + // Private member variables. + mutable FPRType m_fpr_type; + FPR m_fpr; + IOVEC m_iovec; + YMM m_ymm_set; + RegInfo m_reg_info; + uint64_t m_gpr_x86_64[k_num_gpr_registers_x86_64]; + + // Private member methods. + lldb_private::Error + WriteRegister(const uint32_t reg, const RegisterValue &value); + + bool IsRegisterSetAvailable (uint32_t set_index) const; + + lldb::ByteOrder + GetByteOrder() const; + + bool + IsGPR(uint32_t reg_index) const; + + FPRType + GetFPRType () const; + + bool + IsFPR(uint32_t reg_index) const; + + bool + WriteFPR(); + + bool IsFPR(uint32_t reg_index, FPRType fpr_type) const; + + bool + CopyXSTATEtoYMM (uint32_t reg_index, lldb::ByteOrder byte_order); + + bool + CopyYMMtoXSTATE(uint32_t reg, lldb::ByteOrder byte_order); + + bool + IsAVX (uint32_t reg_index) const; + + bool + ReadFPR (); + + lldb_private::Error + ReadRegisterRaw (uint32_t reg_index, RegisterValue ®_value); + + bool + ReadGPR(); + + bool + WriteGPR(); + }; +} + +#endif // #ifndef lldb_NativeRegisterContextLinux_x86_64_h + diff --git a/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_i386.cpp b/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_i386.cpp index af9445f..185ba26 100644 --- a/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_i386.cpp +++ b/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_i386.cpp @@ -62,18 +62,14 @@ RegisterContextFreeBSD_i386::RegisterContextFreeBSD_i386(const ArchSpec &target_ { } -RegisterContextFreeBSD_i386::~RegisterContextFreeBSD_i386() -{ -} - size_t -RegisterContextFreeBSD_i386::GetGPRSize() +RegisterContextFreeBSD_i386::GetGPRSize() const { return sizeof(GPR); } const RegisterInfo * -RegisterContextFreeBSD_i386::GetRegisterInfo() +RegisterContextFreeBSD_i386::GetRegisterInfo() const { switch (m_target_arch.GetMachine()) { @@ -84,3 +80,9 @@ RegisterContextFreeBSD_i386::GetRegisterInfo() return NULL; } } + +uint32_t +RegisterContextFreeBSD_i386::GetRegisterCount () const +{ + return static_cast (sizeof (g_register_infos_i386) / sizeof (g_register_infos_i386 [0])); +} diff --git a/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_i386.h b/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_i386.h index 8dc6a91..62792c0 100644 --- a/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_i386.h +++ b/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_i386.h @@ -17,13 +17,15 @@ class RegisterContextFreeBSD_i386 { public: RegisterContextFreeBSD_i386(const lldb_private::ArchSpec &target_arch); - virtual ~RegisterContextFreeBSD_i386(); size_t - GetGPRSize(); + GetGPRSize() const override; const lldb_private::RegisterInfo * - GetRegisterInfo(); + GetRegisterInfo() const override; + + uint32_t + GetRegisterCount () const override; }; #endif diff --git a/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_mips64.cpp b/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_mips64.cpp index 4714251..c31b0ee 100644 --- a/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_mips64.cpp +++ b/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_mips64.cpp @@ -71,20 +71,23 @@ RegisterContextFreeBSD_mips64::RegisterContextFreeBSD_mips64(const ArchSpec &tar { } -RegisterContextFreeBSD_mips64::~RegisterContextFreeBSD_mips64() -{ -} - size_t -RegisterContextFreeBSD_mips64::GetGPRSize() +RegisterContextFreeBSD_mips64::GetGPRSize() const { return sizeof(GPR); } const RegisterInfo * -RegisterContextFreeBSD_mips64::GetRegisterInfo() +RegisterContextFreeBSD_mips64::GetRegisterInfo() const { assert (m_target_arch.GetCore() == ArchSpec::eCore_mips64); return g_register_infos_mips64; } +uint32_t +RegisterContextFreeBSD_mips64::GetRegisterCount () const +{ + return static_cast (sizeof (g_register_infos_mips64) / sizeof (g_register_infos_mips64 [0])); +} + + diff --git a/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_mips64.h b/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_mips64.h index 493750c..f9a3ce0 100644 --- a/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_mips64.h +++ b/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_mips64.h @@ -17,13 +17,15 @@ class RegisterContextFreeBSD_mips64: { public: RegisterContextFreeBSD_mips64(const lldb_private::ArchSpec &target_arch); - virtual ~RegisterContextFreeBSD_mips64(); size_t - GetGPRSize(); + GetGPRSize() const override; const lldb_private::RegisterInfo * - GetRegisterInfo(); + GetRegisterInfo() const override; + + uint32_t + GetRegisterCount () const override; }; #endif diff --git a/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.cpp b/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.cpp index 0b5c4f0..257de71 100644 --- a/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.cpp +++ b/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.cpp @@ -67,10 +67,17 @@ struct dbreg { #include "RegisterInfos_x86_64.h" #undef DECLARE_REGISTER_INFOS_X86_64_STRUCT +static std::vector& +GetSharedRegisterInfoVector () +{ + static std::vector register_infos; + return register_infos; +} + static const RegisterInfo * GetRegisterInfo_i386(const lldb_private::ArchSpec& arch) { - static std::vector g_register_infos; + static std::vector g_register_infos (GetSharedRegisterInfoVector ()); // Allocate RegisterInfo only once if (g_register_infos.empty()) @@ -92,33 +99,61 @@ GetRegisterInfo_i386(const lldb_private::ArchSpec& arch) return &g_register_infos[0]; } -RegisterContextFreeBSD_x86_64::RegisterContextFreeBSD_x86_64(const ArchSpec &target_arch) : - lldb_private::RegisterInfoInterface(target_arch) +static const RegisterInfo * +PrivateGetRegisterInfoPtr (const lldb_private::ArchSpec& target_arch) { + switch (target_arch.GetMachine()) + { + case llvm::Triple::x86: + return GetRegisterInfo_i386 (target_arch); + case llvm::Triple::x86_64: + return g_register_infos_x86_64; + default: + assert(false && "Unhandled target architecture."); + return nullptr; + } } -RegisterContextFreeBSD_x86_64::~RegisterContextFreeBSD_x86_64() +static uint32_t +PrivateGetRegisterCount (const lldb_private::ArchSpec& target_arch) +{ + switch (target_arch.GetMachine()) + { + case llvm::Triple::x86: + // This vector should have already been filled. + assert (!GetSharedRegisterInfoVector ().empty () && "i386 register info vector not filled."); + return static_cast (GetSharedRegisterInfoVector().size ()); + case llvm::Triple::x86_64: + return static_cast (sizeof (g_register_infos_x86_64) / sizeof (g_register_infos_x86_64 [0])); + default: + assert(false && "Unhandled target architecture."); + return 0; + } +} + +RegisterContextFreeBSD_x86_64::RegisterContextFreeBSD_x86_64(const ArchSpec &target_arch) : + lldb_private::RegisterInfoInterface(target_arch), + m_register_info_p (PrivateGetRegisterInfoPtr (target_arch)), + m_register_count (PrivateGetRegisterCount (target_arch)) { } size_t -RegisterContextFreeBSD_x86_64::GetGPRSize() +RegisterContextFreeBSD_x86_64::GetGPRSize() const { return sizeof(GPR); } const RegisterInfo * -RegisterContextFreeBSD_x86_64::GetRegisterInfo() +RegisterContextFreeBSD_x86_64::GetRegisterInfo() const { - switch (m_target_arch.GetMachine()) - { - case llvm::Triple::x86: - return GetRegisterInfo_i386 (m_target_arch); - case llvm::Triple::x86_64: - return g_register_infos_x86_64; - default: - assert(false && "Unhandled target architecture."); - return NULL; - } + return m_register_info_p; } +uint32_t +RegisterContextFreeBSD_x86_64::GetRegisterCount () const +{ + return m_register_count; +} + + diff --git a/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.h b/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.h index 818da72..21fbdb4 100644 --- a/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.h +++ b/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.h @@ -17,13 +17,19 @@ class RegisterContextFreeBSD_x86_64: { public: RegisterContextFreeBSD_x86_64(const lldb_private::ArchSpec &target_arch); - virtual ~RegisterContextFreeBSD_x86_64(); size_t - GetGPRSize(); + GetGPRSize() const override; const lldb_private::RegisterInfo * - GetRegisterInfo(); + GetRegisterInfo() const override; + + uint32_t + GetRegisterCount () const override; + +private: + const lldb_private::RegisterInfo *m_register_info_p; + const uint32_t m_register_count; }; #endif diff --git a/lldb/source/Plugins/Process/Utility/RegisterContextLinux_i386.cpp b/lldb/source/Plugins/Process/Utility/RegisterContextLinux_i386.cpp index e6ef1fb..b9b9dca 100644 --- a/lldb/source/Plugins/Process/Utility/RegisterContextLinux_i386.cpp +++ b/lldb/source/Plugins/Process/Utility/RegisterContextLinux_i386.cpp @@ -100,18 +100,14 @@ RegisterContextLinux_i386::RegisterContextLinux_i386(const ArchSpec &target_arch { } -RegisterContextLinux_i386::~RegisterContextLinux_i386() -{ -} - size_t -RegisterContextLinux_i386::GetGPRSize() +RegisterContextLinux_i386::GetGPRSize() const { return sizeof(GPR); } const RegisterInfo * -RegisterContextLinux_i386::GetRegisterInfo() +RegisterContextLinux_i386::GetRegisterInfo() const { switch (m_target_arch.GetMachine()) { @@ -122,3 +118,10 @@ RegisterContextLinux_i386::GetRegisterInfo() return NULL; } } + +uint32_t +RegisterContextLinux_i386::GetRegisterCount () const +{ + return static_cast (sizeof (g_register_infos_i386) / sizeof (g_register_infos_i386 [0])); +} + diff --git a/lldb/source/Plugins/Process/Utility/RegisterContextLinux_i386.h b/lldb/source/Plugins/Process/Utility/RegisterContextLinux_i386.h index 870b1cde..f8b21fc 100644 --- a/lldb/source/Plugins/Process/Utility/RegisterContextLinux_i386.h +++ b/lldb/source/Plugins/Process/Utility/RegisterContextLinux_i386.h @@ -17,13 +17,15 @@ class RegisterContextLinux_i386 { public: RegisterContextLinux_i386(const lldb_private::ArchSpec &target_arch); - virtual ~RegisterContextLinux_i386(); size_t - GetGPRSize(); + GetGPRSize() const override; const lldb_private::RegisterInfo * - GetRegisterInfo(); + GetRegisterInfo() const override; + + uint32_t + GetRegisterCount () const override; }; #endif diff --git a/lldb/source/Plugins/Process/Utility/RegisterContextLinux_x86_64.cpp b/lldb/source/Plugins/Process/Utility/RegisterContextLinux_x86_64.cpp index e291519..9cfc1c4 100644 --- a/lldb/source/Plugins/Process/Utility/RegisterContextLinux_x86_64.cpp +++ b/lldb/source/Plugins/Process/Utility/RegisterContextLinux_x86_64.cpp @@ -80,10 +80,17 @@ struct UserArea #include "RegisterInfos_x86_64.h" #undef DECLARE_REGISTER_INFOS_X86_64_STRUCT +static std::vector& +GetPrivateRegisterInfoVector () +{ + static std::vector g_register_infos; + return g_register_infos; +} + static const RegisterInfo * GetRegisterInfo_i386(const lldb_private::ArchSpec &arch) { - static std::vector g_register_infos; + static std::vector g_register_infos (GetPrivateRegisterInfoVector ()); // Allocate RegisterInfo only once if (g_register_infos.empty()) @@ -105,33 +112,60 @@ GetRegisterInfo_i386(const lldb_private::ArchSpec &arch) return &g_register_infos[0]; } -RegisterContextLinux_x86_64::RegisterContextLinux_x86_64(const ArchSpec &target_arch) : - lldb_private::RegisterInfoInterface(target_arch) +static const RegisterInfo * +GetRegisterInfoPtr (const ArchSpec &target_arch) { + switch (target_arch.GetMachine()) + { + case llvm::Triple::x86: + return GetRegisterInfo_i386 (target_arch); + case llvm::Triple::x86_64: + return g_register_infos_x86_64; + default: + assert(false && "Unhandled target architecture."); + return nullptr; + } } -RegisterContextLinux_x86_64::~RegisterContextLinux_x86_64() +static uint32_t +GetRegisterInfoCount (const ArchSpec &target_arch) +{ + switch (target_arch.GetMachine()) + { + case llvm::Triple::x86: + { + assert (!GetPrivateRegisterInfoVector ().empty () && "i386 register info not yet filled."); + return static_cast (GetPrivateRegisterInfoVector ().size ()); + } + case llvm::Triple::x86_64: + return static_cast (sizeof (g_register_infos_x86_64) / sizeof (g_register_infos_x86_64 [0])); + default: + assert(false && "Unhandled target architecture."); + return 0; + } +} + +RegisterContextLinux_x86_64::RegisterContextLinux_x86_64(const ArchSpec &target_arch) : + lldb_private::RegisterInfoInterface(target_arch), + m_register_info_p (GetRegisterInfoPtr (target_arch)), + m_register_info_count (GetRegisterInfoCount (target_arch)) { } size_t -RegisterContextLinux_x86_64::GetGPRSize() +RegisterContextLinux_x86_64::GetGPRSize() const { return sizeof(GPR); } const RegisterInfo * -RegisterContextLinux_x86_64::GetRegisterInfo() +RegisterContextLinux_x86_64::GetRegisterInfo() const { - switch (m_target_arch.GetMachine()) - { - case llvm::Triple::x86: - return GetRegisterInfo_i386 (m_target_arch); - case llvm::Triple::x86_64: - return g_register_infos_x86_64; - default: - assert(false && "Unhandled target architecture."); - return NULL; - } + return m_register_info_p; } +uint32_t +RegisterContextLinux_x86_64::GetRegisterCount () const +{ + return m_register_info_count; +} diff --git a/lldb/source/Plugins/Process/Utility/RegisterContextLinux_x86_64.h b/lldb/source/Plugins/Process/Utility/RegisterContextLinux_x86_64.h index 2ef094b..7b68286 100644 --- a/lldb/source/Plugins/Process/Utility/RegisterContextLinux_x86_64.h +++ b/lldb/source/Plugins/Process/Utility/RegisterContextLinux_x86_64.h @@ -17,13 +17,19 @@ class RegisterContextLinux_x86_64 { public: RegisterContextLinux_x86_64(const lldb_private::ArchSpec &target_arch); - virtual ~RegisterContextLinux_x86_64(); size_t - GetGPRSize(); + GetGPRSize() const override; const lldb_private::RegisterInfo * - GetRegisterInfo(); + GetRegisterInfo() const override; + + uint32_t + GetRegisterCount () const override; + +private: + const lldb_private::RegisterInfo *m_register_info_p; + uint32_t m_register_info_count; }; #endif diff --git a/lldb/source/Plugins/Process/Utility/RegisterInfoInterface.h b/lldb/source/Plugins/Process/Utility/RegisterInfoInterface.h index bcce128..382475f 100644 --- a/lldb/source/Plugins/Process/Utility/RegisterInfoInterface.h +++ b/lldb/source/Plugins/Process/Utility/RegisterInfoInterface.h @@ -10,6 +10,8 @@ #ifndef lldb_RegisterInfoInterface_h #define lldb_RegisterInfoInterface_h +#include "lldb/Core/ArchSpec.h" + namespace lldb_private { @@ -25,12 +27,20 @@ namespace lldb_private virtual ~RegisterInfoInterface () {} virtual size_t - GetGPRSize () = 0; + GetGPRSize () const = 0; virtual const lldb_private::RegisterInfo * - GetRegisterInfo () = 0; + GetRegisterInfo () const = 0; + + virtual uint32_t + GetRegisterCount () const = 0; + + const lldb_private::ArchSpec& + GetTargetArchitecture() const + { return m_target_arch; } public: + // FIXME make private. lldb_private::ArchSpec m_target_arch; }; diff --git a/lldb/source/Plugins/Process/Utility/lldb-x86-register-enums.h b/lldb/source/Plugins/Process/Utility/lldb-x86-register-enums.h new file mode 100644 index 0000000..c4706d5 --- /dev/null +++ b/lldb/source/Plugins/Process/Utility/lldb-x86-register-enums.h @@ -0,0 +1,292 @@ +//===-- lldb-x86-register-enums.h -------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef lldb_x86_register_enums_h +#define lldb_x86_register_enums_h + +namespace lldb_private +{ + + //--------------------------------------------------------------------------- + // Internal codes for all i386 registers. + //--------------------------------------------------------------------------- + enum + { + k_first_gpr_i386, + gpr_eax_i386 = k_first_gpr_i386, + gpr_ebx_i386, + gpr_ecx_i386, + gpr_edx_i386, + gpr_edi_i386, + gpr_esi_i386, + gpr_ebp_i386, + gpr_esp_i386, + gpr_eip_i386, + gpr_eflags_i386, + gpr_cs_i386, + gpr_fs_i386, + gpr_gs_i386, + gpr_ss_i386, + gpr_ds_i386, + gpr_es_i386, + + k_first_alias_i386, + gpr_ax_i386 = k_first_alias_i386, + gpr_bx_i386, + gpr_cx_i386, + gpr_dx_i386, + gpr_di_i386, + gpr_si_i386, + gpr_bp_i386, + gpr_sp_i386, + gpr_ah_i386, + gpr_bh_i386, + gpr_ch_i386, + gpr_dh_i386, + gpr_al_i386, + gpr_bl_i386, + gpr_cl_i386, + gpr_dl_i386, + k_last_alias_i386 = gpr_dl_i386, + + k_last_gpr_i386 = k_last_alias_i386, + + k_first_fpr_i386, + fpu_fctrl_i386 = k_first_fpr_i386, + fpu_fstat_i386, + fpu_ftag_i386, + fpu_fop_i386, + fpu_fiseg_i386, + fpu_fioff_i386, + fpu_foseg_i386, + fpu_fooff_i386, + fpu_mxcsr_i386, + fpu_mxcsrmask_i386, + fpu_st0_i386, + fpu_st1_i386, + fpu_st2_i386, + fpu_st3_i386, + fpu_st4_i386, + fpu_st5_i386, + fpu_st6_i386, + fpu_st7_i386, + fpu_mm0_i386, + fpu_mm1_i386, + fpu_mm2_i386, + fpu_mm3_i386, + fpu_mm4_i386, + fpu_mm5_i386, + fpu_mm6_i386, + fpu_mm7_i386, + fpu_xmm0_i386, + fpu_xmm1_i386, + fpu_xmm2_i386, + fpu_xmm3_i386, + fpu_xmm4_i386, + fpu_xmm5_i386, + fpu_xmm6_i386, + fpu_xmm7_i386, + k_last_fpr_i386 = fpu_xmm7_i386, + + k_first_avx_i386, + fpu_ymm0_i386 = k_first_avx_i386, + fpu_ymm1_i386, + fpu_ymm2_i386, + fpu_ymm3_i386, + fpu_ymm4_i386, + fpu_ymm5_i386, + fpu_ymm6_i386, + fpu_ymm7_i386, + k_last_avx_i386 = fpu_ymm7_i386, + + dr0_i386, + dr1_i386, + dr2_i386, + dr3_i386, + dr4_i386, + dr5_i386, + dr6_i386, + dr7_i386, + + k_num_registers_i386, + k_num_gpr_registers_i386 = k_last_gpr_i386 - k_first_gpr_i386 + 1, + k_num_fpr_registers_i386 = k_last_fpr_i386 - k_first_fpr_i386 + 1, + k_num_avx_registers_i386 = k_last_avx_i386 - k_first_avx_i386 + 1 + }; + + //--------------------------------------------------------------------------- + // Internal codes for all x86_64 registers. + //--------------------------------------------------------------------------- + enum + { + k_first_gpr_x86_64, + gpr_rax_x86_64 = k_first_gpr_x86_64, + gpr_rbx_x86_64, + gpr_rcx_x86_64, + gpr_rdx_x86_64, + gpr_rdi_x86_64, + gpr_rsi_x86_64, + gpr_rbp_x86_64, + gpr_rsp_x86_64, + gpr_r8_x86_64, + gpr_r9_x86_64, + gpr_r10_x86_64, + gpr_r11_x86_64, + gpr_r12_x86_64, + gpr_r13_x86_64, + gpr_r14_x86_64, + gpr_r15_x86_64, + gpr_rip_x86_64, + gpr_rflags_x86_64, + gpr_cs_x86_64, + gpr_fs_x86_64, + gpr_gs_x86_64, + gpr_ss_x86_64, + gpr_ds_x86_64, + gpr_es_x86_64, + + k_first_alias_x86_64, + gpr_eax_x86_64 = k_first_alias_x86_64, + gpr_ebx_x86_64, + gpr_ecx_x86_64, + gpr_edx_x86_64, + gpr_edi_x86_64, + gpr_esi_x86_64, + gpr_ebp_x86_64, + gpr_esp_x86_64, + gpr_r8d_x86_64, // Low 32 bits of r8 + gpr_r9d_x86_64, // Low 32 bits of r9 + gpr_r10d_x86_64, // Low 32 bits of r10 + gpr_r11d_x86_64, // Low 32 bits of r11 + gpr_r12d_x86_64, // Low 32 bits of r12 + gpr_r13d_x86_64, // Low 32 bits of r13 + gpr_r14d_x86_64, // Low 32 bits of r14 + gpr_r15d_x86_64, // Low 32 bits of r15 + gpr_ax_x86_64, + gpr_bx_x86_64, + gpr_cx_x86_64, + gpr_dx_x86_64, + gpr_di_x86_64, + gpr_si_x86_64, + gpr_bp_x86_64, + gpr_sp_x86_64, + gpr_r8w_x86_64, // Low 16 bits of r8 + gpr_r9w_x86_64, // Low 16 bits of r9 + gpr_r10w_x86_64, // Low 16 bits of r10 + gpr_r11w_x86_64, // Low 16 bits of r11 + gpr_r12w_x86_64, // Low 16 bits of r12 + gpr_r13w_x86_64, // Low 16 bits of r13 + gpr_r14w_x86_64, // Low 16 bits of r14 + gpr_r15w_x86_64, // Low 16 bits of r15 + gpr_ah_x86_64, + gpr_bh_x86_64, + gpr_ch_x86_64, + gpr_dh_x86_64, + gpr_al_x86_64, + gpr_bl_x86_64, + gpr_cl_x86_64, + gpr_dl_x86_64, + gpr_dil_x86_64, + gpr_sil_x86_64, + gpr_bpl_x86_64, + gpr_spl_x86_64, + gpr_r8l_x86_64, // Low 8 bits of r8 + gpr_r9l_x86_64, // Low 8 bits of r9 + gpr_r10l_x86_64, // Low 8 bits of r10 + gpr_r11l_x86_64, // Low 8 bits of r11 + gpr_r12l_x86_64, // Low 8 bits of r12 + gpr_r13l_x86_64, // Low 8 bits of r13 + gpr_r14l_x86_64, // Low 8 bits of r14 + gpr_r15l_x86_64, // Low 8 bits of r15 + k_last_alias_x86_64 = gpr_r15l_x86_64, + + k_last_gpr_x86_64 = k_last_alias_x86_64, + + k_first_fpr_x86_64, + fpu_fctrl_x86_64 = k_first_fpr_x86_64, + fpu_fstat_x86_64, + fpu_ftag_x86_64, + fpu_fop_x86_64, + fpu_fiseg_x86_64, + fpu_fioff_x86_64, + fpu_foseg_x86_64, + fpu_fooff_x86_64, + fpu_mxcsr_x86_64, + fpu_mxcsrmask_x86_64, + fpu_st0_x86_64, + fpu_st1_x86_64, + fpu_st2_x86_64, + fpu_st3_x86_64, + fpu_st4_x86_64, + fpu_st5_x86_64, + fpu_st6_x86_64, + fpu_st7_x86_64, + fpu_mm0_x86_64, + fpu_mm1_x86_64, + fpu_mm2_x86_64, + fpu_mm3_x86_64, + fpu_mm4_x86_64, + fpu_mm5_x86_64, + fpu_mm6_x86_64, + fpu_mm7_x86_64, + fpu_xmm0_x86_64, + fpu_xmm1_x86_64, + fpu_xmm2_x86_64, + fpu_xmm3_x86_64, + fpu_xmm4_x86_64, + fpu_xmm5_x86_64, + fpu_xmm6_x86_64, + fpu_xmm7_x86_64, + fpu_xmm8_x86_64, + fpu_xmm9_x86_64, + fpu_xmm10_x86_64, + fpu_xmm11_x86_64, + fpu_xmm12_x86_64, + fpu_xmm13_x86_64, + fpu_xmm14_x86_64, + fpu_xmm15_x86_64, + k_last_fpr_x86_64 = fpu_xmm15_x86_64, + + k_first_avx_x86_64, + fpu_ymm0_x86_64 = k_first_avx_x86_64, + fpu_ymm1_x86_64, + fpu_ymm2_x86_64, + fpu_ymm3_x86_64, + fpu_ymm4_x86_64, + fpu_ymm5_x86_64, + fpu_ymm6_x86_64, + fpu_ymm7_x86_64, + fpu_ymm8_x86_64, + fpu_ymm9_x86_64, + fpu_ymm10_x86_64, + fpu_ymm11_x86_64, + fpu_ymm12_x86_64, + fpu_ymm13_x86_64, + fpu_ymm14_x86_64, + fpu_ymm15_x86_64, + k_last_avx_x86_64 = fpu_ymm15_x86_64, + + dr0_x86_64, + dr1_x86_64, + dr2_x86_64, + dr3_x86_64, + dr4_x86_64, + dr5_x86_64, + dr6_x86_64, + dr7_x86_64, + + k_num_registers_x86_64, + k_num_gpr_registers_x86_64 = k_last_gpr_x86_64 - k_first_gpr_x86_64 + 1, + k_num_fpr_registers_x86_64 = k_last_fpr_x86_64 - k_first_fpr_x86_64 + 1, + k_num_avx_registers_x86_64 = k_last_avx_x86_64 - k_first_avx_x86_64 + 1 + }; + +} + +#endif // #ifndef lldb_x86_register_enums_h diff --git a/lldb/source/Plugins/Process/elf-core/ProcessElfCore.h b/lldb/source/Plugins/Process/elf-core/ProcessElfCore.h index d8135bf..6b4a857 100644 --- a/lldb/source/Plugins/Process/elf-core/ProcessElfCore.h +++ b/lldb/source/Plugins/Process/elf-core/ProcessElfCore.h @@ -132,7 +132,7 @@ public: // Returns AUXV structure found in the core file const lldb::DataBufferSP - GetAuxvData(); + GetAuxvData() override; protected: void diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp index f871f25..624983d 100644 --- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp +++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp @@ -1586,6 +1586,8 @@ GDBRemoteCommunicationClient::GetGDBServerProgramVersion() bool GDBRemoteCommunicationClient::GetHostInfo (bool force) { + Log *log (ProcessGDBRemoteLog::GetLogIfAnyCategoryIsSet (GDBR_LOG_PROCESS)); + if (force || m_qHostInfo_is_valid == eLazyBoolCalculate) { m_qHostInfo_is_valid = eLazyBoolNo; @@ -1819,6 +1821,9 @@ GDBRemoteCommunicationClient::GetHostInfo (bool force) { assert (byte_order == m_host_arch.GetByteOrder()); } + + if (log) + log->Printf ("GDBRemoteCommunicationClient::%s parsed host architecture as %s, triple as %s from triple text %s", __FUNCTION__, m_host_arch.GetArchitectureName () ? m_host_arch.GetArchitectureName () : "", m_host_arch.GetTriple ().getTriple ().c_str(), triple.c_str ()); } if (!distribution_id.empty ()) m_host_arch.SetDistributionId (distribution_id.c_str ()); diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.cpp index 21f9eda..3d19b11 100644 --- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.cpp +++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.cpp @@ -14,19 +14,26 @@ // C Includes // C++ Includes +#include + // Other libraries and framework includes #include "llvm/ADT/Triple.h" #include "lldb/Interpreter/Args.h" #include "lldb/Core/ConnectionFileDescriptor.h" +#include "lldb/Core/Debugger.h" #include "lldb/Core/Log.h" #include "lldb/Core/State.h" #include "lldb/Core/StreamString.h" +#include "lldb/Host/Debug.h" #include "lldb/Host/Endian.h" #include "lldb/Host/File.h" #include "lldb/Host/Host.h" #include "lldb/Host/TimeValue.h" #include "lldb/Target/Platform.h" #include "lldb/Target/Process.h" +#include "lldb/Target/NativeRegisterContext.h" +#include "../../../Host/common/NativeProcessProtocol.h" +#include "../../../Host/common/NativeThreadProtocol.h" // Project includes #include "Utility/StringExtractorGDBRemote.h" @@ -37,6 +44,22 @@ using namespace lldb; using namespace lldb_private; //---------------------------------------------------------------------- +// GDBRemote Errors +//---------------------------------------------------------------------- + +namespace +{ + enum GDBRemoteServerError + { + // Set to the first unused error number in literal form below + eErrorFirst = 29, + eErrorNoProcess = eErrorFirst, + eErrorResume, + eErrorExitStatus + }; +} + +//---------------------------------------------------------------------- // GDBRemoteCommunicationServer constructor //---------------------------------------------------------------------- GDBRemoteCommunicationServer::GDBRemoteCommunicationServer(bool is_platform) : @@ -50,12 +73,28 @@ GDBRemoteCommunicationServer::GDBRemoteCommunicationServer(bool is_platform) : m_proc_infos (), m_proc_infos_index (0), m_port_map (), - m_port_offset(0) + m_port_offset(0), + m_current_tid (LLDB_INVALID_THREAD_ID), + m_continue_tid (LLDB_INVALID_THREAD_ID), + m_debugged_process_mutex (Mutex::eMutexTypeRecursive), + m_debugged_process_sp (), + m_debugger_sp (), + m_stdio_communication ("process.stdio"), + m_exit_now (false), + m_inferior_prev_state (StateType::eStateInvalid), + m_thread_suffix_supported (false), + m_list_threads_in_stop_reply (false), + m_active_auxv_buffer_sp (), + m_saved_registers_mutex (), + m_saved_registers_map (), + m_next_saved_registers_id (1) { + assert(is_platform && "must be lldb-platform if debugger is not specified"); } GDBRemoteCommunicationServer::GDBRemoteCommunicationServer(bool is_platform, - const lldb::PlatformSP& platform_sp) : + const lldb::PlatformSP& platform_sp, + lldb::DebuggerSP &debugger_sp) : GDBRemoteCommunication ("gdb-remote.server", "gdb-remote.server.rx_packet", is_platform), m_platform_sp (platform_sp), m_async_thread (LLDB_INVALID_HOST_THREAD), @@ -66,9 +105,24 @@ GDBRemoteCommunicationServer::GDBRemoteCommunicationServer(bool is_platform, m_proc_infos (), m_proc_infos_index (0), m_port_map (), - m_port_offset(0) + m_port_offset(0), + m_current_tid (LLDB_INVALID_THREAD_ID), + m_continue_tid (LLDB_INVALID_THREAD_ID), + m_debugged_process_mutex (Mutex::eMutexTypeRecursive), + m_debugged_process_sp (), + m_debugger_sp (debugger_sp), + m_stdio_communication ("process.stdio"), + m_exit_now (false), + m_inferior_prev_state (StateType::eStateInvalid), + m_thread_suffix_supported (false), + m_list_threads_in_stop_reply (false), + m_active_auxv_buffer_sp (), + m_saved_registers_mutex (), + m_saved_registers_map (), + m_next_saved_registers_id (1) { assert(platform_sp); + assert((is_platform || debugger_sp) && "must specify non-NULL debugger_sp when lldb-gdbserver"); } //---------------------------------------------------------------------- @@ -78,37 +132,14 @@ GDBRemoteCommunicationServer::~GDBRemoteCommunicationServer() { } - -//void * -//GDBRemoteCommunicationServer::AsyncThread (void *arg) -//{ -// GDBRemoteCommunicationServer *server = (GDBRemoteCommunicationServer*) arg; -// -// Log *log;// (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); -// if (log) -// log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %i) thread starting...", __FUNCTION__, arg, process->GetID()); -// -// StringExtractorGDBRemote packet; -// -// while () -// { -// if (packet. -// } -// -// if (log) -// log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %i) thread exiting...", __FUNCTION__, arg, process->GetID()); -// -// process->m_async_thread = LLDB_INVALID_HOST_THREAD; -// return NULL; -//} -// -bool +GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::GetPacketAndSendResponse (uint32_t timeout_usec, Error &error, bool &interrupt, bool &quit) { StringExtractorGDBRemote packet; + PacketResult packet_result = WaitForPacketWithTimeoutMicroSecondsNoLock (packet, timeout_usec); if (packet_result == PacketResult::Success) { @@ -124,11 +155,6 @@ GDBRemoteCommunicationServer::GetPacketAndSendResponse (uint32_t timeout_usec, quit = true; break; - case StringExtractorGDBRemote::eServerPacketType_interrupt: - error.SetErrorString("interrupt received"); - interrupt = true; - break; - default: case StringExtractorGDBRemote::eServerPacketType_unimplemented: packet_result = SendUnimplementedResponse (packet.GetStringRef().c_str()); @@ -164,6 +190,7 @@ GDBRemoteCommunicationServer::GetPacketAndSendResponse (uint32_t timeout_usec, case StringExtractorGDBRemote::eServerPacketType_k: packet_result = Handle_k (packet); + quit = true; break; case StringExtractorGDBRemote::eServerPacketType_qLaunchSuccess: @@ -174,6 +201,10 @@ GDBRemoteCommunicationServer::GetPacketAndSendResponse (uint32_t timeout_usec, packet_result = Handle_qGroupName (packet); break; + case StringExtractorGDBRemote::eServerPacketType_qProcessInfo: + packet_result = Handle_qProcessInfo (packet); + break; + case StringExtractorGDBRemote::eServerPacketType_qProcessInfoPID: packet_result = Handle_qProcessInfoPID (packet); break; @@ -238,6 +269,26 @@ GDBRemoteCommunicationServer::GetPacketAndSendResponse (uint32_t timeout_usec, packet_result = Handle_qPlatform_shell (packet); break; + case StringExtractorGDBRemote::eServerPacketType_C: + packet_result = Handle_C (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_c: + packet_result = Handle_c (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_vCont: + packet_result = Handle_vCont (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_vCont_actions: + packet_result = Handle_vCont_actions (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_stop_reason: // ? + packet_result = Handle_stop_reason (packet); + break; + case StringExtractorGDBRemote::eServerPacketType_vFile_open: packet_result = Handle_vFile_Open (packet); break; @@ -281,6 +332,92 @@ GDBRemoteCommunicationServer::GetPacketAndSendResponse (uint32_t timeout_usec, case StringExtractorGDBRemote::eServerPacketType_vFile_unlink: packet_result = Handle_vFile_unlink (packet); break; + + case StringExtractorGDBRemote::eServerPacketType_qRegisterInfo: + packet_result = Handle_qRegisterInfo (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_qfThreadInfo: + packet_result = Handle_qfThreadInfo (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_qsThreadInfo: + packet_result = Handle_qsThreadInfo (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_p: + packet_result = Handle_p (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_P: + packet_result = Handle_P (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_H: + packet_result = Handle_H (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_m: + packet_result = Handle_m (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_M: + packet_result = Handle_M (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_qMemoryRegionInfoSupported: + packet_result = Handle_qMemoryRegionInfoSupported (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_qMemoryRegionInfo: + packet_result = Handle_qMemoryRegionInfo (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_interrupt: + if (IsGdbServer ()) + packet_result = Handle_interrupt (packet); + else + { + error.SetErrorString("interrupt received"); + interrupt = true; + } + break; + + case StringExtractorGDBRemote::eServerPacketType_Z: + packet_result = Handle_Z (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_z: + packet_result = Handle_z (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_s: + packet_result = Handle_s (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_qSupported: + packet_result = Handle_qSupported (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_QThreadSuffixSupported: + packet_result = Handle_QThreadSuffixSupported (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_QListThreadsInStopReply: + packet_result = Handle_QListThreadsInStopReply (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_qXfer_auxv_read: + packet_result = Handle_qXfer_auxv_read (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_QSaveRegisterState: + packet_result = Handle_QSaveRegisterState (packet); + break; + + case StringExtractorGDBRemote::eServerPacketType_QRestoreRegisterState: + packet_result = Handle_QRestoreRegisterState (packet); + break; } } else @@ -295,7 +432,12 @@ GDBRemoteCommunicationServer::GetPacketAndSendResponse (uint32_t timeout_usec, error.SetErrorString("timeout"); } } - return packet_result == PacketResult::Success; + + // Check if anything occurred that would force us to want to exit. + if (m_exit_now) + quit = true; + + return packet_result; } lldb_private::Error @@ -318,6 +460,96 @@ GDBRemoteCommunicationServer::SetLaunchFlags (unsigned int launch_flags) lldb_private::Error GDBRemoteCommunicationServer::LaunchProcess () { + // FIXME This looks an awful lot like we could override this in + // derived classes, one for lldb-platform, the other for lldb-gdbserver. + if (IsGdbServer ()) + return LaunchDebugServerProcess (); + else + return LaunchPlatformProcess (); +} + +lldb_private::Error +GDBRemoteCommunicationServer::LaunchDebugServerProcess () +{ + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); + + if (!m_process_launch_info.GetArguments ().GetArgumentCount ()) + return lldb_private::Error ("%s: no process command line specified to launch", __FUNCTION__); + + lldb_private::Error error; + { + Mutex::Locker locker (m_debugged_process_mutex); + assert (!m_debugged_process_sp && "lldb-gdbserver creating debugged process but one already exists"); + error = m_platform_sp->LaunchNativeProcess ( + m_process_launch_info, + *this, + m_debugged_process_sp); + } + + if (!error.Success ()) + { + fprintf (stderr, "%s: failed to launch executable %s", __FUNCTION__, m_process_launch_info.GetArguments ().GetArgumentAtIndex (0)); + return error; + } + + // Setup stdout/stderr mapping from inferior. + auto terminal_fd = m_debugged_process_sp->GetTerminalFileDescriptor (); + if (terminal_fd >= 0) + { + if (log) + log->Printf ("ProcessGDBRemoteCommunicationServer::%s setting inferior STDIO fd to %d", __FUNCTION__, terminal_fd); + error = SetSTDIOFileDescriptor (terminal_fd); + if (error.Fail ()) + return error; + } + else + { + if (log) + log->Printf ("ProcessGDBRemoteCommunicationServer::%s ignoring inferior STDIO since terminal fd reported as %d", __FUNCTION__, terminal_fd); + } + + printf ("Launched '%s' as process %" PRIu64 "...\n", m_process_launch_info.GetArguments ().GetArgumentAtIndex (0), m_process_launch_info.GetProcessID ()); + + // Add to list of spawned processes. + lldb::pid_t pid; + if ((pid = m_process_launch_info.GetProcessID ()) != LLDB_INVALID_PROCESS_ID) + { + // add to spawned pids + { + Mutex::Locker locker (m_spawned_pids_mutex); + // On an lldb-gdbserver, we would expect there to be only one. + assert (m_spawned_pids.empty () && "lldb-gdbserver adding tracked process but one already existed"); + m_spawned_pids.insert (pid); + } + } + + if (error.Success ()) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s beginning check to wait for launched application to hit first stop", __FUNCTION__); + + int iteration = 0; + // Wait for the process to hit its first stop state. + while (!StateIsStoppedState (m_debugged_process_sp->GetState (), false)) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s waiting for launched process to hit first stop (%d)...", __FUNCTION__, iteration++); + + // FIXME use a sleep method with finer granularity. + sleep (1); + } + + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s launched application has hit first stop", __FUNCTION__); + + } + + return error; +} + +lldb_private::Error +GDBRemoteCommunicationServer::LaunchPlatformProcess () +{ if (!m_process_launch_info.GetArguments ().GetArgumentCount ()) return lldb_private::Error ("%s: no process command line specified to launch", __FUNCTION__); @@ -341,806 +573,2864 @@ GDBRemoteCommunicationServer::LaunchProcess () lldb::pid_t pid; if ( (pid = m_process_launch_info.GetProcessID()) != LLDB_INVALID_PROCESS_ID ) { - Mutex::Locker locker (m_spawned_pids_mutex); - m_spawned_pids.insert(pid); + // add to spawned pids + { + Mutex::Locker locker (m_spawned_pids_mutex); + m_spawned_pids.insert(pid); + } } return error; } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::SendUnimplementedResponse (const char *) +lldb_private::Error +GDBRemoteCommunicationServer::AttachToProcess (lldb::pid_t pid) { - // TODO: Log the packet we aren't handling... - return SendPacketNoLock ("", 0); -} + Error error; -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::SendErrorResponse (uint8_t err) -{ - char packet[16]; - int packet_len = ::snprintf (packet, sizeof(packet), "E%2.2x", err); - assert (packet_len < (int)sizeof(packet)); - return SendPacketNoLock (packet, packet_len); -} + if (!IsGdbServer ()) + { + error.SetErrorString("cannot AttachToProcess () unless process is lldb-gdbserver"); + return error; + } + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64, __FUNCTION__, pid); -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::SendOKResponse () -{ - return SendPacketNoLock ("OK", 2); + // Scope for mutex locker. + { + // Before we try to attach, make sure we aren't already monitoring something else. + Mutex::Locker locker (m_spawned_pids_mutex); + if (!m_spawned_pids.empty ()) + { + error.SetErrorStringWithFormat ("cannot attach to a process %" PRIu64 " when another process with pid %" PRIu64 " is being debugged.", pid, *m_spawned_pids.begin()); + return error; + } + + // Try to attach. + error = m_platform_sp->AttachNativeProcess (pid, *this, m_debugged_process_sp); + if (!error.Success ()) + { + fprintf (stderr, "%s: failed to attach to process %" PRIu64 ": %s", __FUNCTION__, pid, error.AsCString ()); + return error; + } + + // Setup stdout/stderr mapping from inferior. + auto terminal_fd = m_debugged_process_sp->GetTerminalFileDescriptor (); + if (terminal_fd >= 0) + { + if (log) + log->Printf ("ProcessGDBRemoteCommunicationServer::%s setting inferior STDIO fd to %d", __FUNCTION__, terminal_fd); + error = SetSTDIOFileDescriptor (terminal_fd); + if (error.Fail ()) + return error; + } + else + { + if (log) + log->Printf ("ProcessGDBRemoteCommunicationServer::%s ignoring inferior STDIO since terminal fd reported as %d", __FUNCTION__, terminal_fd); + } + + printf ("Attached to process %" PRIu64 "...\n", pid); + + // Add to list of spawned processes. + assert (m_spawned_pids.empty () && "lldb-gdbserver adding tracked process but one already existed"); + m_spawned_pids.insert (pid); + + return error; + } } -bool -GDBRemoteCommunicationServer::HandshakeWithClient(Error *error_ptr) +void +GDBRemoteCommunicationServer::InitializeDelegate (lldb_private::NativeProcessProtocol *process) { - return GetAck() == PacketResult::Success; + assert (process && "process cannot be NULL"); + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); + if (log) + { + log->Printf ("GDBRemoteCommunicationServer::%s called with NativeProcessProtocol pid %" PRIu64 ", current state: %s", + __FUNCTION__, + process->GetID (), + StateAsCString (process->GetState ())); + } } GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_qHostInfo (StringExtractorGDBRemote &packet) +GDBRemoteCommunicationServer::SendWResponse (lldb_private::NativeProcessProtocol *process) { - StreamString response; - - // $cputype:16777223;cpusubtype:3;ostype:Darwin;vendor:apple;endian:little;ptrsize:8;#00 + assert (process && "process cannot be NULL"); + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); - ArchSpec host_arch (Host::GetArchitecture ()); - const llvm::Triple &host_triple = host_arch.GetTriple(); - response.PutCString("triple:"); - response.PutCStringAsRawHex8(host_triple.getTriple().c_str()); - response.Printf (";ptrsize:%u;",host_arch.GetAddressByteSize()); + // send W notification + ExitType exit_type = ExitType::eExitTypeInvalid; + int return_code = 0; + std::string exit_description; - const char* distribution_id = host_arch.GetDistributionId ().AsCString (); - if (distribution_id) + const bool got_exit_info = process->GetExitStatus (&exit_type, &return_code, exit_description); + if (!got_exit_info) { - response.PutCString("distribution_id:"); - response.PutCStringAsRawHex8(distribution_id); - response.PutCString(";"); - } - - uint32_t cpu = host_arch.GetMachOCPUType(); - uint32_t sub = host_arch.GetMachOCPUSubType(); - if (cpu != LLDB_INVALID_CPUTYPE) - response.Printf ("cputype:%u;", cpu); - if (sub != LLDB_INVALID_CPUTYPE) - response.Printf ("cpusubtype:%u;", sub); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 ", failed to retrieve process exit status", __FUNCTION__, process->GetID ()); - if (cpu == ArchSpec::kCore_arm_any) - response.Printf("watchpoint_exceptions_received:before;"); // On armv7 we use "synchronous" watchpoints which means the exception is delivered before the instruction executes. + StreamGDBRemote response; + response.PutChar ('E'); + response.PutHex8 (GDBRemoteServerError::eErrorExitStatus); + return SendPacketNoLock(response.GetData(), response.GetSize()); + } else - response.Printf("watchpoint_exceptions_received:after;"); - - switch (lldb::endian::InlHostByteOrder()) { - case eByteOrderBig: response.PutCString ("endian:big;"); break; - case eByteOrderLittle: response.PutCString ("endian:little;"); break; - case eByteOrderPDP: response.PutCString ("endian:pdp;"); break; - default: response.PutCString ("endian:unknown;"); break; - } + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 ", returning exit type %d, return code %d [%s]", __FUNCTION__, process->GetID (), exit_type, return_code, exit_description.c_str ()); - uint32_t major = UINT32_MAX; - uint32_t minor = UINT32_MAX; - uint32_t update = UINT32_MAX; - if (Host::GetOSVersion (major, minor, update)) - { - if (major != UINT32_MAX) + StreamGDBRemote response; + + char return_type_code; + switch (exit_type) { - response.Printf("os_version:%u", major); - if (minor != UINT32_MAX) - { - response.Printf(".%u", minor); - if (update != UINT32_MAX) - response.Printf(".%u", update); - } - response.PutChar(';'); + case ExitType::eExitTypeExit: return_type_code = 'W'; break; + case ExitType::eExitTypeSignal: return_type_code = 'X'; break; + case ExitType::eExitTypeStop: return_type_code = 'S'; break; + + case ExitType::eExitTypeInvalid: + default: return_type_code = 'E'; break; } + response.PutChar (return_type_code); + + // POSIX exit status limited to unsigned 8 bits. + response.PutHex8 (return_code); + + return SendPacketNoLock(response.GetData(), response.GetSize()); } +} - std::string s; - if (Host::GetOSBuildString (s)) +static void +AppendHexValue (StreamString &response, const uint8_t* buf, uint32_t buf_size, bool swap) +{ + int64_t i; + if (swap) { - response.PutCString ("os_build:"); - response.PutCStringAsRawHex8(s.c_str()); - response.PutChar(';'); + for (i = buf_size-1; i >= 0; i--) + response.PutHex8 (buf[i]); } - if (Host::GetOSKernelDescription (s)) + else { - response.PutCString ("os_kernel:"); - response.PutCStringAsRawHex8(s.c_str()); - response.PutChar(';'); + for (i = 0; i < buf_size; i++) + response.PutHex8 (buf[i]); } -#if defined(__APPLE__) +} -#if defined(__arm__) || defined(__arm64__) - // For iOS devices, we are connected through a USB Mux so we never pretend - // to actually have a hostname as far as the remote lldb that is connecting - // to this lldb-platform is concerned - response.PutCString ("hostname:"); - response.PutCStringAsRawHex8("127.0.0.1"); - response.PutChar(';'); -#else // #if defined(__arm__) || defined(__arm64__) - if (Host::GetHostname (s)) +static void +WriteRegisterValueInHexFixedWidth (StreamString &response, + NativeRegisterContextSP ®_ctx_sp, + const RegisterInfo ®_info, + const RegisterValue *reg_value_p) +{ + RegisterValue reg_value; + if (!reg_value_p) { - response.PutCString ("hostname:"); - response.PutCStringAsRawHex8(s.c_str()); - response.PutChar(';'); + Error error = reg_ctx_sp->ReadRegister (®_info, reg_value); + if (error.Success ()) + reg_value_p = ®_value; + // else log. } -#endif // #if defined(__arm__) || defined(__arm64__) -#else // #if defined(__APPLE__) - if (Host::GetHostname (s)) + if (reg_value_p) { - response.PutCString ("hostname:"); - response.PutCStringAsRawHex8(s.c_str()); - response.PutChar(';'); + AppendHexValue (response, (const uint8_t*) reg_value_p->GetBytes (), reg_value_p->GetByteSize (), false); + } + else + { + // Zero-out any unreadable values. + if (reg_info.byte_size > 0) + { + std::basic_string zeros(reg_info.byte_size, '\0'); + AppendHexValue (response, zeros.data(), zeros.size(), false); + } } -#endif // #if defined(__APPLE__) - - return SendPacketNoLock (response.GetData(), response.GetSize()); } +// WriteGdbRegnumWithFixedWidthHexRegisterValue (response, reg_ctx_sp, *reg_info_p, reg_value); + + static void -CreateProcessInfoResponse (const ProcessInstanceInfo &proc_info, StreamString &response) +WriteGdbRegnumWithFixedWidthHexRegisterValue (StreamString &response, + NativeRegisterContextSP ®_ctx_sp, + const RegisterInfo ®_info, + const RegisterValue ®_value) { - response.Printf ("pid:%" PRIu64 ";ppid:%" PRIu64 ";uid:%i;gid:%i;euid:%i;egid:%i;", - proc_info.GetProcessID(), - proc_info.GetParentProcessID(), - proc_info.GetUserID(), - proc_info.GetGroupID(), - proc_info.GetEffectiveUserID(), - proc_info.GetEffectiveGroupID()); - response.PutCString ("name:"); - response.PutCStringAsRawHex8(proc_info.GetName()); - response.PutChar(';'); - const ArchSpec &proc_arch = proc_info.GetArchitecture(); - if (proc_arch.IsValid()) - { - const llvm::Triple &proc_triple = proc_arch.GetTriple(); - response.PutCString("triple:"); - response.PutCStringAsRawHex8(proc_triple.getTriple().c_str()); - response.PutChar(';'); - } + // Output the register number as 'NN:VVVVVVVV;' where NN is a 2 bytes HEX + // gdb register number, and VVVVVVVV is the correct number of hex bytes + // as ASCII for the register value. + if (reg_info.kinds[eRegisterKindGDB] == LLDB_INVALID_REGNUM) + return; + + response.Printf ("%.02x:", reg_info.kinds[eRegisterKindGDB]); + WriteRegisterValueInHexFixedWidth (response, reg_ctx_sp, reg_info, ®_value); + response.PutChar (';'); } + GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_qProcessInfoPID (StringExtractorGDBRemote &packet) +GDBRemoteCommunicationServer::SendStopReplyPacketForThread (lldb::tid_t tid) { - // Packet format: "qProcessInfoPID:%i" where %i is the pid - packet.SetFilePos(::strlen ("qProcessInfoPID:")); - lldb::pid_t pid = packet.GetU32 (LLDB_INVALID_PROCESS_ID); - if (pid != LLDB_INVALID_PROCESS_ID) + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD)); + + // Ensure we're llgs. + if (!IsGdbServer ()) { - ProcessInstanceInfo proc_info; - if (Host::GetProcessInfo(pid, proc_info)) + // Only supported on llgs + return SendUnimplementedResponse (""); + } + + // Ensure we have a debugged process. + if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) + return SendErrorResponse (50); + + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s preparing packet for pid %" PRIu64 " tid %" PRIu64, + __FUNCTION__, m_debugged_process_sp->GetID (), tid); + + // Ensure we can get info on the given thread. + NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadByID (tid)); + if (!thread_sp) + return SendErrorResponse (51); + + // Grab the reason this thread stopped. + struct ThreadStopInfo tid_stop_info; + if (!thread_sp->GetStopReason (tid_stop_info)) + return SendErrorResponse (52); + + const bool did_exec = tid_stop_info.reason == eStopReasonExec; + // FIXME implement register handling for exec'd inferiors. + // if (did_exec) + // { + // const bool force = true; + // InitializeRegisters(force); + // } + + StreamString response; + // Output the T packet with the thread + response.PutChar ('T'); + int signum = tid_stop_info.details.signal.signo; + if (log) + { + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " got signal signo = %d, reason = %d, exc_type = %" PRIu64, + __FUNCTION__, + m_debugged_process_sp->GetID (), + tid, + signum, + tid_stop_info.reason, + tid_stop_info.details.exception.type); + } + + switch (tid_stop_info.reason) + { + case eStopReasonSignal: + case eStopReasonException: + signum = thread_sp->TranslateStopInfoToGdbSignal (tid_stop_info); + break; + default: + signum = 0; + if (log) { - StreamString response; - CreateProcessInfoResponse (proc_info, response); - return SendPacketNoLock (response.GetData(), response.GetSize()); + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " has stop reason %d, using signo = 0 in stop reply response", + __FUNCTION__, + m_debugged_process_sp->GetID (), + tid, + tid_stop_info.reason); } + break; } - return SendErrorResponse (1); -} -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_qfProcessInfo (StringExtractorGDBRemote &packet) -{ - m_proc_infos_index = 0; - m_proc_infos.Clear(); + // Print the signal number. + response.PutHex8 (signum & 0xff); - ProcessInstanceInfoMatch match_info; - packet.SetFilePos(::strlen ("qfProcessInfo")); - if (packet.GetChar() == ':') + // Include the tid. + response.Printf ("thread:%" PRIx64 ";", tid); + + // Include the thread name if there is one. + const char *thread_name = thread_sp->GetName (); + if (thread_name && thread_name[0]) { + size_t thread_name_len = strlen(thread_name); - std::string key; - std::string value; - while (packet.GetNameColonValue(key, value)) + if (::strcspn (thread_name, "$#+-;:") == thread_name_len) { - bool success = true; - if (key.compare("name") == 0) - { - StringExtractor extractor; - extractor.GetStringRef().swap(value); - extractor.GetHexByteString (value); - match_info.GetProcessInfo().GetExecutableFile().SetFile(value.c_str(), false); - } - else if (key.compare("name_match") == 0) + response.PutCString ("name:"); + response.PutCString (thread_name); + } + else + { + // The thread name contains special chars, send as hex bytes. + response.PutCString ("hexname:"); + response.PutCStringAsRawHex8 (thread_name); + } + response.PutChar (';'); + } + + // FIXME look for analog + // thread_identifier_info_data_t thread_ident_info; + // if (DNBThreadGetIdentifierInfo (pid, tid, &thread_ident_info)) + // { + // if (thread_ident_info.dispatch_qaddr != 0) + // ostrm << std::hex << "qaddr:" << thread_ident_info.dispatch_qaddr << ';'; + // } + + // If a 'QListThreadsInStopReply' was sent to enable this feature, we + // will send all thread IDs back in the "threads" key whose value is + // a listc of hex thread IDs separated by commas: + // "threads:10a,10b,10c;" + // This will save the debugger from having to send a pair of qfThreadInfo + // and qsThreadInfo packets, but it also might take a lot of room in the + // stop reply packet, so it must be enabled only on systems where there + // are no limits on packet lengths. + if (m_list_threads_in_stop_reply) + { + response.PutCString ("threads:"); + + uint32_t thread_index = 0; + NativeThreadProtocolSP listed_thread_sp; + for (listed_thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index); listed_thread_sp; ++thread_index, listed_thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index)) + { + if (thread_index > 0) + response.PutChar (','); + response.Printf ("%" PRIx64, listed_thread_sp->GetID ()); + } + response.PutChar (';'); + } + + // + // Expedite registers. + // + + // Grab the register context. + NativeRegisterContextSP reg_ctx_sp = thread_sp->GetRegisterContext (); + if (reg_ctx_sp) + { + // Expedite all registers in the first register set (i.e. should be GPRs) that are not contained in other registers. + const RegisterSet *reg_set_p; + if (reg_ctx_sp->GetRegisterSetCount () > 0 && ((reg_set_p = reg_ctx_sp->GetRegisterSet (0)) != nullptr)) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s expediting registers from set '%s' (registers set count: %zu)", __FUNCTION__, reg_set_p->name ? reg_set_p->name : "", reg_set_p->num_registers); + + for (const uint32_t *reg_num_p = reg_set_p->registers; *reg_num_p != LLDB_INVALID_REGNUM; ++reg_num_p) { - if (value.compare("equals") == 0) - { - match_info.SetNameMatchType (eNameMatchEquals); - } - else if (value.compare("starts_with") == 0) - { - match_info.SetNameMatchType (eNameMatchStartsWith); - } - else if (value.compare("ends_with") == 0) - { - match_info.SetNameMatchType (eNameMatchEndsWith); - } - else if (value.compare("contains") == 0) - { - match_info.SetNameMatchType (eNameMatchContains); - } - else if (value.compare("regex") == 0) + const RegisterInfo *const reg_info_p = reg_ctx_sp->GetRegisterInfoAtIndex (*reg_num_p); + if (reg_info_p == nullptr) { - match_info.SetNameMatchType (eNameMatchRegularExpression); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed to get register info for register set '%s', register index %" PRIu32, __FUNCTION__, reg_set_p->name ? reg_set_p->name : "", *reg_num_p); } - else + else if (reg_info_p->value_regs == nullptr) { - success = false; + // Only expediate registers that are not contained in other registers. + RegisterValue reg_value; + Error error = reg_ctx_sp->ReadRegister (reg_info_p, reg_value); + if (error.Success ()) + WriteGdbRegnumWithFixedWidthHexRegisterValue (response, reg_ctx_sp, *reg_info_p, reg_value); + else + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed to read register '%s' index %" PRIu32 ": %s", __FUNCTION__, reg_info_p->name ? reg_info_p->name : "", *reg_num_p, error.AsCString ()); + + } } } - else if (key.compare("pid") == 0) - { - match_info.GetProcessInfo().SetProcessID (Args::StringToUInt32(value.c_str(), LLDB_INVALID_PROCESS_ID, 0, &success)); - } - else if (key.compare("parent_pid") == 0) - { - match_info.GetProcessInfo().SetParentProcessID (Args::StringToUInt32(value.c_str(), LLDB_INVALID_PROCESS_ID, 0, &success)); - } - else if (key.compare("uid") == 0) - { - match_info.GetProcessInfo().SetUserID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success)); - } - else if (key.compare("gid") == 0) - { - match_info.GetProcessInfo().SetGroupID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success)); - } - else if (key.compare("euid") == 0) - { - match_info.GetProcessInfo().SetEffectiveUserID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success)); - } - else if (key.compare("egid") == 0) - { - match_info.GetProcessInfo().SetEffectiveGroupID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success)); - } - else if (key.compare("all_users") == 0) - { - match_info.SetMatchAllUsers(Args::StringToBoolean(value.c_str(), false, &success)); - } - else if (key.compare("triple") == 0) - { - match_info.GetProcessInfo().GetArchitecture().SetTriple (value.c_str(), NULL); - } - else - { - success = false; - } + } + } - if (!success) - return SendErrorResponse (2); + if (did_exec) + { + response.PutCString ("reason:exec;"); + } + else if ((tid_stop_info.reason == eStopReasonException) && tid_stop_info.details.exception.type) + { + response.PutCString ("metype:"); + response.PutHex64 (tid_stop_info.details.exception.type); + response.PutCString (";mecount:"); + response.PutHex32 (tid_stop_info.details.exception.data_count); + response.PutChar (';'); + + for (uint32_t i = 0; i < tid_stop_info.details.exception.data_count; ++i) + { + response.PutCString ("medata:"); + response.PutHex64 (tid_stop_info.details.exception.data[i]); + response.PutChar (';'); } } - if (Host::FindProcesses (match_info, m_proc_infos)) + return SendPacketNoLock (response.GetData(), response.GetSize()); +} + +void +GDBRemoteCommunicationServer::HandleInferiorState_Exited (lldb_private::NativeProcessProtocol *process) +{ + assert (process && "process cannot be NULL"); + + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__); + + // Send the exit result, and don't flush output. + // Note: flushing output here would join the inferior stdio reflection thread, which + // would gunk up the waitpid monitor thread that is calling this. + PacketResult result = SendStopReasonForState (StateType::eStateExited, false); + if (result != PacketResult::Success) { - // We found something, return the first item by calling the get - // subsequent process info packet handler... - return Handle_qsProcessInfo (packet); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed to send stop notification for PID %" PRIu64 ", state: eStateExited", __FUNCTION__, process->GetID ()); } - return SendErrorResponse (3); + + // Remove the process from the list of spawned pids. + { + Mutex::Locker locker (m_spawned_pids_mutex); + if (m_spawned_pids.erase (process->GetID ()) < 1) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed to remove PID %" PRIu64 " from the spawned pids list", __FUNCTION__, process->GetID ()); + + } + } + + // FIXME can't do this yet - since process state propagation is currently + // synchronous, it is running off the NativeProcessProtocol's innards and + // will tear down the NPP while it still has code to execute. +#if 0 + // Clear the NativeProcessProtocol pointer. + { + Mutex::Locker locker (m_debugged_process_mutex); + m_debugged_process_sp.reset(); + } +#endif + + // Close the pipe to the inferior terminal i/o if we launched it + // and set one up. Otherwise, 'k' and its flush of stdio could + // end up waiting on a thread join that will never end. Consider + // adding a timeout to the connection thread join call so we + // can avoid that scenario altogether. + MaybeCloseInferiorTerminalConnection (); + + // We are ready to exit the debug monitor. + m_exit_now = true; } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_qsProcessInfo (StringExtractorGDBRemote &packet) +void +GDBRemoteCommunicationServer::HandleInferiorState_Stopped (lldb_private::NativeProcessProtocol *process) { - if (m_proc_infos_index < m_proc_infos.GetSize()) + assert (process && "process cannot be NULL"); + + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__); + + // Send the stop reason unless this is the stop after the + // launch or attach. + switch (m_inferior_prev_state) { - StreamString response; - CreateProcessInfoResponse (m_proc_infos.GetProcessInfoAtIndex(m_proc_infos_index), response); - ++m_proc_infos_index; - return SendPacketNoLock (response.GetData(), response.GetSize()); + case eStateLaunching: + case eStateAttaching: + // Don't send anything per debugserver behavior. + break; + default: + // In all other cases, send the stop reason. + PacketResult result = SendStopReasonForState (StateType::eStateStopped, false); + if (result != PacketResult::Success) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed to send stop notification for PID %" PRIu64 ", state: eStateExited", __FUNCTION__, process->GetID ()); + } + break; } - return SendErrorResponse (4); } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_qUserName (StringExtractorGDBRemote &packet) +void +GDBRemoteCommunicationServer::ProcessStateChanged (lldb_private::NativeProcessProtocol *process, lldb::StateType state) { - // Packet format: "qUserName:%i" where %i is the uid - packet.SetFilePos(::strlen ("qUserName:")); - uint32_t uid = packet.GetU32 (UINT32_MAX); - if (uid != UINT32_MAX) + assert (process && "process cannot be NULL"); + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); + if (log) { - std::string name; - if (Host::GetUserName (uid, name)) + log->Printf ("GDBRemoteCommunicationServer::%s called with NativeProcessProtocol pid %" PRIu64 ", state: %s", + __FUNCTION__, + process->GetID (), + StateAsCString (state)); + } + + switch (state) + { + case StateType::eStateExited: + HandleInferiorState_Exited (process); + break; + + case StateType::eStateStopped: + HandleInferiorState_Stopped (process); + break; + + default: + if (log) { - StreamString response; - response.PutCStringAsRawHex8 (name.c_str()); - return SendPacketNoLock (response.GetData(), response.GetSize()); + log->Printf ("GDBRemoteCommunicationServer::%s didn't handle state change for pid %" PRIu64 ", new state: %s", + __FUNCTION__, + process->GetID (), + StateAsCString (state)); } + break; } - return SendErrorResponse (5); + // Remember the previous state reported to us. + m_inferior_prev_state = state; } GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_qGroupName (StringExtractorGDBRemote &packet) +GDBRemoteCommunicationServer::SendONotification (const char *buffer, uint32_t len) { - // Packet format: "qGroupName:%i" where %i is the gid - packet.SetFilePos(::strlen ("qGroupName:")); - uint32_t gid = packet.GetU32 (UINT32_MAX); - if (gid != UINT32_MAX) + if ((buffer == nullptr) || (len == 0)) { - std::string name; - if (Host::GetGroupName (gid, name)) - { - StreamString response; - response.PutCStringAsRawHex8 (name.c_str()); - return SendPacketNoLock (response.GetData(), response.GetSize()); - } + // Nothing to send. + return PacketResult::Success; } - return SendErrorResponse (6); + + StreamString response; + response.PutChar ('O'); + response.PutBytesAsRawHex8 (buffer, len); + + return SendPacketNoLock (response.GetData (), response.GetSize ()); } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_qSpeedTest (StringExtractorGDBRemote &packet) +lldb_private::Error +GDBRemoteCommunicationServer::SetSTDIOFileDescriptor (int fd) { - packet.SetFilePos(::strlen ("qSpeedTest:")); + Error error; - std::string key; - std::string value; - bool success = packet.GetNameColonValue(key, value); - if (success && key.compare("response_size") == 0) + // Set up the Read Thread for reading/handling process I/O + std::unique_ptr conn_up (new ConnectionFileDescriptor (fd, true)); + if (!conn_up) { - uint32_t response_size = Args::StringToUInt32(value.c_str(), 0, 0, &success); - if (success) + error.SetErrorString ("failed to create ConnectionFileDescriptor"); + return error; + } + + m_stdio_communication.SetConnection (conn_up.release()); + if (!m_stdio_communication.IsConnected ()) + { + error.SetErrorString ("failed to set connection for inferior I/O communication"); + return error; + } + + m_stdio_communication.SetReadThreadBytesReceivedCallback (STDIOReadThreadBytesReceived, this); + m_stdio_communication.StartReadThread(); + + return error; +} + +void +GDBRemoteCommunicationServer::STDIOReadThreadBytesReceived (void *baton, const void *src, size_t src_len) +{ + GDBRemoteCommunicationServer *server = reinterpret_cast (baton); + static_cast (server->SendONotification (static_cast(src), src_len)); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::SendUnimplementedResponse (const char *) +{ + // TODO: Log the packet we aren't handling... + return SendPacketNoLock ("", 0); +} + + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::SendErrorResponse (uint8_t err) +{ + char packet[16]; + int packet_len = ::snprintf (packet, sizeof(packet), "E%2.2x", err); + assert (packet_len < (int)sizeof(packet)); + return SendPacketNoLock (packet, packet_len); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::SendIllFormedResponse (const StringExtractorGDBRemote &failed_packet, const char *message) +{ + Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PACKETS)); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s: ILLFORMED: '%s' (%s)", __FUNCTION__, failed_packet.GetStringRef ().c_str (), message ? message : ""); + return SendErrorResponse (0x03); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::SendOKResponse () +{ + return SendPacketNoLock ("OK", 2); +} + +bool +GDBRemoteCommunicationServer::HandshakeWithClient(Error *error_ptr) +{ + return GetAck() == PacketResult::Success; +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qHostInfo (StringExtractorGDBRemote &packet) +{ + StreamString response; + + // $cputype:16777223;cpusubtype:3;ostype:Darwin;vendor:apple;endian:little;ptrsize:8;#00 + + ArchSpec host_arch (Host::GetArchitecture ()); + const llvm::Triple &host_triple = host_arch.GetTriple(); + response.PutCString("triple:"); + response.PutCStringAsRawHex8(host_triple.getTriple().c_str()); + response.Printf (";ptrsize:%u;",host_arch.GetAddressByteSize()); + + const char* distribution_id = host_arch.GetDistributionId ().AsCString (); + if (distribution_id) + { + response.PutCString("distribution_id:"); + response.PutCStringAsRawHex8(distribution_id); + response.PutCString(";"); + } + + // Only send out MachO info when lldb-platform/llgs is running on a MachO host. +#if defined(__APPLE__) + uint32_t cpu = host_arch.GetMachOCPUType(); + uint32_t sub = host_arch.GetMachOCPUSubType(); + if (cpu != LLDB_INVALID_CPUTYPE) + response.Printf ("cputype:%u;", cpu); + if (sub != LLDB_INVALID_CPUTYPE) + response.Printf ("cpusubtype:%u;", sub); + + if (cpu == ArchSpec::kCore_arm_any) + response.Printf("watchpoint_exceptions_received:before;"); // On armv7 we use "synchronous" watchpoints which means the exception is delivered before the instruction executes. + else + response.Printf("watchpoint_exceptions_received:after;"); +#else + response.Printf("watchpoint_exceptions_received:after;"); +#endif + + switch (lldb::endian::InlHostByteOrder()) + { + case eByteOrderBig: response.PutCString ("endian:big;"); break; + case eByteOrderLittle: response.PutCString ("endian:little;"); break; + case eByteOrderPDP: response.PutCString ("endian:pdp;"); break; + default: response.PutCString ("endian:unknown;"); break; + } + + uint32_t major = UINT32_MAX; + uint32_t minor = UINT32_MAX; + uint32_t update = UINT32_MAX; + if (Host::GetOSVersion (major, minor, update)) + { + if (major != UINT32_MAX) + { + response.Printf("os_version:%u", major); + if (minor != UINT32_MAX) + { + response.Printf(".%u", minor); + if (update != UINT32_MAX) + response.Printf(".%u", update); + } + response.PutChar(';'); + } + } + + std::string s; + if (Host::GetOSBuildString (s)) + { + response.PutCString ("os_build:"); + response.PutCStringAsRawHex8(s.c_str()); + response.PutChar(';'); + } + if (Host::GetOSKernelDescription (s)) + { + response.PutCString ("os_kernel:"); + response.PutCStringAsRawHex8(s.c_str()); + response.PutChar(';'); + } +#if defined(__APPLE__) + +#if defined(__arm__) || defined(__arm64__) + // For iOS devices, we are connected through a USB Mux so we never pretend + // to actually have a hostname as far as the remote lldb that is connecting + // to this lldb-platform is concerned + response.PutCString ("hostname:"); + response.PutCStringAsRawHex8("127.0.0.1"); + response.PutChar(';'); +#else // #if defined(__arm__) || defined(__arm64__) + if (Host::GetHostname (s)) + { + response.PutCString ("hostname:"); + response.PutCStringAsRawHex8(s.c_str()); + response.PutChar(';'); + } +#endif // #if defined(__arm__) || defined(__arm64__) + +#else // #if defined(__APPLE__) + if (Host::GetHostname (s)) + { + response.PutCString ("hostname:"); + response.PutCStringAsRawHex8(s.c_str()); + response.PutChar(';'); + } +#endif // #if defined(__APPLE__) + + return SendPacketNoLock (response.GetData(), response.GetSize()); +} + +static void +CreateProcessInfoResponse (const ProcessInstanceInfo &proc_info, StreamString &response) +{ + response.Printf ("pid:%" PRIu64 ";ppid:%" PRIu64 ";uid:%i;gid:%i;euid:%i;egid:%i;", + proc_info.GetProcessID(), + proc_info.GetParentProcessID(), + proc_info.GetUserID(), + proc_info.GetGroupID(), + proc_info.GetEffectiveUserID(), + proc_info.GetEffectiveGroupID()); + response.PutCString ("name:"); + response.PutCStringAsRawHex8(proc_info.GetName()); + response.PutChar(';'); + const ArchSpec &proc_arch = proc_info.GetArchitecture(); + if (proc_arch.IsValid()) + { + const llvm::Triple &proc_triple = proc_arch.GetTriple(); + response.PutCString("triple:"); + response.PutCStringAsRawHex8(proc_triple.getTriple().c_str()); + response.PutChar(';'); + } +} + +static void +CreateProcessInfoResponse_DebugServerStyle (const ProcessInstanceInfo &proc_info, StreamString &response) +{ + response.Printf ("pid:%" PRIx64 ";parent-pid:%" PRIx64 ";real-uid:%x;real-gid:%x;effective-uid:%x;effective-gid:%x;", + proc_info.GetProcessID(), + proc_info.GetParentProcessID(), + proc_info.GetUserID(), + proc_info.GetGroupID(), + proc_info.GetEffectiveUserID(), + proc_info.GetEffectiveGroupID()); + + const ArchSpec &proc_arch = proc_info.GetArchitecture(); + if (proc_arch.IsValid()) + { + const uint32_t cpu_type = proc_arch.GetMachOCPUType(); + if (cpu_type != 0) + response.Printf ("cputype:%" PRIx32 ";", cpu_type); + + const uint32_t cpu_subtype = proc_arch.GetMachOCPUSubType(); + if (cpu_subtype != 0) + response.Printf ("cpusubtype:%" PRIx32 ";", cpu_subtype); + + const llvm::Triple &proc_triple = proc_arch.GetTriple(); + const std::string vendor = proc_triple.getVendorName (); + if (!vendor.empty ()) + response.Printf ("vendor:%s;", vendor.c_str ()); + + std::string ostype = proc_triple.getOSName (); + // Adjust so ostype reports ios for Apple/ARM and Apple/ARM64. + if (proc_triple.getVendor () == llvm::Triple::Apple) + { + switch (proc_triple.getArch ()) + { + case llvm::Triple::arm: + case llvm::Triple::arm64: + ostype = "ios"; + break; + default: + // No change. + break; + } + } + response.Printf ("ostype:%s;", ostype.c_str ()); + + + switch (proc_arch.GetByteOrder ()) + { + case lldb::eByteOrderLittle: response.PutCString ("endian:little;"); break; + case lldb::eByteOrderBig: response.PutCString ("endian:big;"); break; + case lldb::eByteOrderPDP: response.PutCString ("endian:pdp;"); break; + default: + // Nothing. + break; + } + + if (proc_triple.isArch64Bit ()) + response.PutCString ("ptrsize:8;"); + else if (proc_triple.isArch32Bit ()) + response.PutCString ("ptrsize:4;"); + else if (proc_triple.isArch16Bit ()) + response.PutCString ("ptrsize:2;"); + } + +} + + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qProcessInfo (StringExtractorGDBRemote &packet) +{ + // Only the gdb server handles this. + if (!IsGdbServer ()) + return SendUnimplementedResponse (packet.GetStringRef ().c_str ()); + + // Fail if we don't have a current process. + if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) + return SendErrorResponse (68); + + ProcessInstanceInfo proc_info; + if (Host::GetProcessInfo (m_debugged_process_sp->GetID (), proc_info)) + { + StreamString response; + CreateProcessInfoResponse_DebugServerStyle(proc_info, response); + return SendPacketNoLock (response.GetData (), response.GetSize ()); + } + + return SendErrorResponse (1); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qProcessInfoPID (StringExtractorGDBRemote &packet) +{ + // Packet format: "qProcessInfoPID:%i" where %i is the pid + packet.SetFilePos(::strlen ("qProcessInfoPID:")); + lldb::pid_t pid = packet.GetU32 (LLDB_INVALID_PROCESS_ID); + if (pid != LLDB_INVALID_PROCESS_ID) + { + ProcessInstanceInfo proc_info; + if (Host::GetProcessInfo(pid, proc_info)) { - if (response_size == 0) - return SendOKResponse(); StreamString response; - uint32_t bytes_left = response_size; - response.PutCString("data:"); - while (bytes_left > 0) + CreateProcessInfoResponse (proc_info, response); + return SendPacketNoLock (response.GetData(), response.GetSize()); + } + } + return SendErrorResponse (1); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qfProcessInfo (StringExtractorGDBRemote &packet) +{ + m_proc_infos_index = 0; + m_proc_infos.Clear(); + + ProcessInstanceInfoMatch match_info; + packet.SetFilePos(::strlen ("qfProcessInfo")); + if (packet.GetChar() == ':') + { + + std::string key; + std::string value; + while (packet.GetNameColonValue(key, value)) + { + bool success = true; + if (key.compare("name") == 0) + { + StringExtractor extractor; + extractor.GetStringRef().swap(value); + extractor.GetHexByteString (value); + match_info.GetProcessInfo().GetExecutableFile().SetFile(value.c_str(), false); + } + else if (key.compare("name_match") == 0) + { + if (value.compare("equals") == 0) + { + match_info.SetNameMatchType (eNameMatchEquals); + } + else if (value.compare("starts_with") == 0) + { + match_info.SetNameMatchType (eNameMatchStartsWith); + } + else if (value.compare("ends_with") == 0) + { + match_info.SetNameMatchType (eNameMatchEndsWith); + } + else if (value.compare("contains") == 0) + { + match_info.SetNameMatchType (eNameMatchContains); + } + else if (value.compare("regex") == 0) + { + match_info.SetNameMatchType (eNameMatchRegularExpression); + } + else + { + success = false; + } + } + else if (key.compare("pid") == 0) + { + match_info.GetProcessInfo().SetProcessID (Args::StringToUInt32(value.c_str(), LLDB_INVALID_PROCESS_ID, 0, &success)); + } + else if (key.compare("parent_pid") == 0) + { + match_info.GetProcessInfo().SetParentProcessID (Args::StringToUInt32(value.c_str(), LLDB_INVALID_PROCESS_ID, 0, &success)); + } + else if (key.compare("uid") == 0) + { + match_info.GetProcessInfo().SetUserID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success)); + } + else if (key.compare("gid") == 0) + { + match_info.GetProcessInfo().SetGroupID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success)); + } + else if (key.compare("euid") == 0) + { + match_info.GetProcessInfo().SetEffectiveUserID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success)); + } + else if (key.compare("egid") == 0) + { + match_info.GetProcessInfo().SetEffectiveGroupID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success)); + } + else if (key.compare("all_users") == 0) + { + match_info.SetMatchAllUsers(Args::StringToBoolean(value.c_str(), false, &success)); + } + else if (key.compare("triple") == 0) + { + match_info.GetProcessInfo().GetArchitecture().SetTriple (value.c_str(), NULL); + } + else + { + success = false; + } + + if (!success) + return SendErrorResponse (2); + } + } + + if (Host::FindProcesses (match_info, m_proc_infos)) + { + // We found something, return the first item by calling the get + // subsequent process info packet handler... + return Handle_qsProcessInfo (packet); + } + return SendErrorResponse (3); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qsProcessInfo (StringExtractorGDBRemote &packet) +{ + if (m_proc_infos_index < m_proc_infos.GetSize()) + { + StreamString response; + CreateProcessInfoResponse (m_proc_infos.GetProcessInfoAtIndex(m_proc_infos_index), response); + ++m_proc_infos_index; + return SendPacketNoLock (response.GetData(), response.GetSize()); + } + return SendErrorResponse (4); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qUserName (StringExtractorGDBRemote &packet) +{ + // Packet format: "qUserName:%i" where %i is the uid + packet.SetFilePos(::strlen ("qUserName:")); + uint32_t uid = packet.GetU32 (UINT32_MAX); + if (uid != UINT32_MAX) + { + std::string name; + if (Host::GetUserName (uid, name)) + { + StreamString response; + response.PutCStringAsRawHex8 (name.c_str()); + return SendPacketNoLock (response.GetData(), response.GetSize()); + } + } + return SendErrorResponse (5); + +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qGroupName (StringExtractorGDBRemote &packet) +{ + // Packet format: "qGroupName:%i" where %i is the gid + packet.SetFilePos(::strlen ("qGroupName:")); + uint32_t gid = packet.GetU32 (UINT32_MAX); + if (gid != UINT32_MAX) + { + std::string name; + if (Host::GetGroupName (gid, name)) + { + StreamString response; + response.PutCStringAsRawHex8 (name.c_str()); + return SendPacketNoLock (response.GetData(), response.GetSize()); + } + } + return SendErrorResponse (6); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qSpeedTest (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen ("qSpeedTest:")); + + std::string key; + std::string value; + bool success = packet.GetNameColonValue(key, value); + if (success && key.compare("response_size") == 0) + { + uint32_t response_size = Args::StringToUInt32(value.c_str(), 0, 0, &success); + if (success) + { + if (response_size == 0) + return SendOKResponse(); + StreamString response; + uint32_t bytes_left = response_size; + response.PutCString("data:"); + while (bytes_left > 0) + { + if (bytes_left >= 26) + { + response.PutCString("ABCDEFGHIJKLMNOPQRSTUVWXYZ"); + bytes_left -= 26; + } + else + { + response.Printf ("%*.*s;", bytes_left, bytes_left, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"); + bytes_left = 0; + } + } + return SendPacketNoLock (response.GetData(), response.GetSize()); + } + } + return SendErrorResponse (7); +} + +// +//static bool +//WaitForProcessToSIGSTOP (const lldb::pid_t pid, const int timeout_in_seconds) +//{ +// const int time_delta_usecs = 100000; +// const int num_retries = timeout_in_seconds/time_delta_usecs; +// for (int i=0; i 0) + { + // Decode the decimal argument string length. This length is the + // number of hex nibbles in the argument string value. + const uint32_t arg_len = packet.GetU32(UINT32_MAX); + if (arg_len == UINT32_MAX) + success = false; + else + { + // Make sure the argument hex string length is followed by a comma + if (packet.GetChar() != ',') + success = false; + else + { + // Decode the argument index. We ignore this really becuase + // who would really send down the arguments in a random order??? + const uint32_t arg_idx = packet.GetU32(UINT32_MAX); + if (arg_idx == UINT32_MAX) + success = false; + else + { + // Make sure the argument index is followed by a comma + if (packet.GetChar() != ',') + success = false; + else + { + // Decode the argument string value from hex bytes + // back into a UTF8 string and make sure the length + // matches the one supplied in the packet + std::string arg; + if (packet.GetHexByteStringFixedLength(arg, arg_len) != (arg_len / 2)) + success = false; + else + { + // If there are any bytes left + if (packet.GetBytesLeft()) + { + if (packet.GetChar() != ',') + success = false; + } + + if (success) + { + if (arg_idx == 0) + m_process_launch_info.GetExecutableFile().SetFile(arg.c_str(), false); + m_process_launch_info.GetArguments().AppendArgument(arg.c_str()); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s added arg %d: \"%s\"", __FUNCTION__, actual_arg_index, arg.c_str ()); + ++actual_arg_index; + } + } + } + } + } + } + } + + if (success) + { + m_process_launch_error = LaunchProcess (); + if (m_process_launch_info.GetProcessID() != LLDB_INVALID_PROCESS_ID) + { + return SendOKResponse (); + } + else + { + Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); + if (log) + log->Printf("GDBRemoteCommunicationServer::%s failed to launch exe: %s", + __FUNCTION__, + m_process_launch_error.AsCString()); + + } + } + return SendErrorResponse (8); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qC (StringExtractorGDBRemote &packet) +{ + StreamString response; + + if (IsGdbServer ()) + { + // Fail if we don't have a current process. + if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) + return SendErrorResponse (68); + + // Make sure we set the current thread so g and p packets return + // the data the gdb will expect. + lldb::tid_t tid = m_debugged_process_sp->GetCurrentThreadID (); + SetCurrentThreadID (tid); + + NativeThreadProtocolSP thread_sp = m_debugged_process_sp->GetCurrentThread (); + if (!thread_sp) + return SendErrorResponse (69); + + response.Printf ("QC%" PRIx64, thread_sp->GetID ()); + } + else + { + // NOTE: lldb should now be using qProcessInfo for process IDs. This path here + // should not be used. It is reporting process id instead of thread id. The + // correct answer doesn't seem to make much sense for lldb-platform. + // CONSIDER: flip to "unsupported". + lldb::pid_t pid = m_process_launch_info.GetProcessID(); + response.Printf("QC%" PRIx64, pid); + + // this should always be platform here + assert (m_is_platform && "this code path should only be traversed for lldb-platform"); + + if (m_is_platform) + { + // If we launch a process and this GDB server is acting as a platform, + // then we need to clear the process launch state so we can start + // launching another process. In order to launch a process a bunch or + // packets need to be sent: environment packets, working directory, + // disable ASLR, and many more settings. When we launch a process we + // then need to know when to clear this information. Currently we are + // selecting the 'qC' packet as that packet which seems to make the most + // sense. + if (pid != LLDB_INVALID_PROCESS_ID) + { + m_process_launch_info.Clear(); + } + } + } + return SendPacketNoLock (response.GetData(), response.GetSize()); +} + +bool +GDBRemoteCommunicationServer::DebugserverProcessReaped (lldb::pid_t pid) +{ + Mutex::Locker locker (m_spawned_pids_mutex); + FreePortForProcess(pid); + return m_spawned_pids.erase(pid) > 0; +} +bool +GDBRemoteCommunicationServer::ReapDebugserverProcess (void *callback_baton, + lldb::pid_t pid, + bool exited, + int signal, // Zero for no signal + int status) // Exit value of process if signal is zero +{ + GDBRemoteCommunicationServer *server = (GDBRemoteCommunicationServer *)callback_baton; + server->DebugserverProcessReaped (pid); + return true; +} + +bool +GDBRemoteCommunicationServer::DebuggedProcessReaped (lldb::pid_t pid) +{ + // reap a process that we were debugging (but not debugserver) + Mutex::Locker locker (m_spawned_pids_mutex); + return m_spawned_pids.erase(pid) > 0; +} + +bool +GDBRemoteCommunicationServer::ReapDebuggedProcess (void *callback_baton, + lldb::pid_t pid, + bool exited, + int signal, // Zero for no signal + int status) // Exit value of process if signal is zero +{ + GDBRemoteCommunicationServer *server = (GDBRemoteCommunicationServer *)callback_baton; + server->DebuggedProcessReaped (pid); + return true; +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qLaunchGDBServer (StringExtractorGDBRemote &packet) +{ +#ifdef _WIN32 + return SendErrorResponse(9); +#else + // Spawn a local debugserver as a platform so we can then attach or launch + // a process... + + if (m_is_platform) + { + // Sleep and wait a bit for debugserver to start to listen... + ConnectionFileDescriptor file_conn; + Error error; + std::string hostname; + // TODO: /tmp/ should not be hardcoded. User might want to override /tmp + // with the TMPDIR environnement variable + packet.SetFilePos(::strlen ("qLaunchGDBServer;")); + std::string name; + std::string value; + uint16_t port = UINT16_MAX; + while (packet.GetNameColonValue(name, value)) + { + if (name.compare ("host") == 0) + hostname.swap(value); + else if (name.compare ("port") == 0) + port = Args::StringToUInt32(value.c_str(), 0, 0); + } + if (port == UINT16_MAX) + port = GetNextAvailablePort(); + + // Spawn a new thread to accept the port that gets bound after + // binding to port 0 (zero). + + if (error.Success()) + { + // Spawn a debugserver and try to get the port it listens to. + ProcessLaunchInfo debugserver_launch_info; + if (hostname.empty()) + hostname = "127.0.0.1"; + Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM)); + if (log) + log->Printf("Launching debugserver with: %s:%u...\n", hostname.c_str(), port); + + debugserver_launch_info.SetMonitorProcessCallback(ReapDebugserverProcess, this, false); + + error = StartDebugserverProcess (hostname.empty() ? NULL : hostname.c_str(), + port, + debugserver_launch_info, + port); + + lldb::pid_t debugserver_pid = debugserver_launch_info.GetProcessID(); + + + if (debugserver_pid != LLDB_INVALID_PROCESS_ID) + { + Mutex::Locker locker (m_spawned_pids_mutex); + m_spawned_pids.insert(debugserver_pid); + if (port > 0) + AssociatePortWithProcess(port, debugserver_pid); + } + else + { + if (port > 0) + FreePort (port); + } + + if (error.Success()) + { + char response[256]; + const int response_len = ::snprintf (response, sizeof(response), "pid:%" PRIu64 ";port:%u;", debugserver_pid, port + m_port_offset); + assert (response_len < (int)sizeof(response)); + PacketResult packet_result = SendPacketNoLock (response, response_len); + + if (packet_result != PacketResult::Success) + { + if (debugserver_pid != LLDB_INVALID_PROCESS_ID) + ::kill (debugserver_pid, SIGINT); + } + return packet_result; + } + } + } + return SendErrorResponse (9); +#endif +} + +bool +GDBRemoteCommunicationServer::KillSpawnedProcess (lldb::pid_t pid) +{ + // make sure we know about this process + { + Mutex::Locker locker (m_spawned_pids_mutex); + if (m_spawned_pids.find(pid) == m_spawned_pids.end()) + return false; + } + + // first try a SIGTERM (standard kill) + Host::Kill (pid, SIGTERM); + + // check if that worked + for (size_t i=0; i<10; ++i) + { + { + Mutex::Locker locker (m_spawned_pids_mutex); + if (m_spawned_pids.find(pid) == m_spawned_pids.end()) + { + // it is now killed + return true; + } + } + usleep (10000); + } + + // check one more time after the final usleep + { + Mutex::Locker locker (m_spawned_pids_mutex); + if (m_spawned_pids.find(pid) == m_spawned_pids.end()) + return true; + } + + // the launched process still lives. Now try killling it again, + // this time with an unblockable signal. + Host::Kill (pid, SIGKILL); + + for (size_t i=0; i<10; ++i) + { + { + Mutex::Locker locker (m_spawned_pids_mutex); + if (m_spawned_pids.find(pid) == m_spawned_pids.end()) + { + // it is now killed + return true; + } + } + usleep (10000); + } + + // check one more time after the final usleep + // Scope for locker + { + Mutex::Locker locker (m_spawned_pids_mutex); + if (m_spawned_pids.find(pid) == m_spawned_pids.end()) + return true; + } + + // no luck - the process still lives + return false; +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qKillSpawnedProcess (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen ("qKillSpawnedProcess:")); + + lldb::pid_t pid = packet.GetU64(LLDB_INVALID_PROCESS_ID); + + // verify that we know anything about this pid. + // Scope for locker + { + Mutex::Locker locker (m_spawned_pids_mutex); + if (m_spawned_pids.find(pid) == m_spawned_pids.end()) + { + // not a pid we know about + return SendErrorResponse (10); + } + } + + // go ahead and attempt to kill the spawned process + if (KillSpawnedProcess (pid)) + return SendOKResponse (); + else + return SendErrorResponse (11); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_k (StringExtractorGDBRemote &packet) +{ + // ignore for now if we're lldb_platform + if (m_is_platform) + return SendUnimplementedResponse (packet.GetStringRef().c_str()); + + // shutdown all spawned processes + std::set spawned_pids_copy; + + // copy pids + { + Mutex::Locker locker (m_spawned_pids_mutex); + spawned_pids_copy.insert (m_spawned_pids.begin (), m_spawned_pids.end ()); + } + + // nuke the spawned processes + for (auto it = spawned_pids_copy.begin (); it != spawned_pids_copy.end (); ++it) + { + lldb::pid_t spawned_pid = *it; + if (!KillSpawnedProcess (spawned_pid)) + { + fprintf (stderr, "%s: failed to kill spawned pid %" PRIu64 ", ignoring.\n", __FUNCTION__, spawned_pid); + } + } + + FlushInferiorOutput (); + + // No OK response for kill packet. + // return SendOKResponse (); + return PacketResult::Success; +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qLaunchSuccess (StringExtractorGDBRemote &packet) +{ + if (m_process_launch_error.Success()) + return SendOKResponse(); + StreamString response; + response.PutChar('E'); + response.PutCString(m_process_launch_error.AsCString("")); + return SendPacketNoLock (response.GetData(), response.GetSize()); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_QEnvironment (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen ("QEnvironment:")); + const uint32_t bytes_left = packet.GetBytesLeft(); + if (bytes_left > 0) + { + m_process_launch_info.GetEnvironmentEntries ().AppendArgument (packet.Peek()); + return SendOKResponse (); + } + return SendErrorResponse (12); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_QLaunchArch (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen ("QLaunchArch:")); + const uint32_t bytes_left = packet.GetBytesLeft(); + if (bytes_left > 0) + { + const char* arch_triple = packet.Peek(); + ArchSpec arch_spec(arch_triple,NULL); + m_process_launch_info.SetArchitecture(arch_spec); + return SendOKResponse(); + } + return SendErrorResponse(13); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_QSetDisableASLR (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen ("QSetDisableASLR:")); + if (packet.GetU32(0)) + m_process_launch_info.GetFlags().Set (eLaunchFlagDisableASLR); + else + m_process_launch_info.GetFlags().Clear (eLaunchFlagDisableASLR); + return SendOKResponse (); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_QSetWorkingDir (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen ("QSetWorkingDir:")); + std::string path; + packet.GetHexByteString(path); + if (m_is_platform) + { +#ifdef _WIN32 + // Not implemented on Windows + return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_QSetWorkingDir unimplemented"); +#else + // If this packet is sent to a platform, then change the current working directory + if (::chdir(path.c_str()) != 0) + return SendErrorResponse(errno); +#endif + } + else + { + m_process_launch_info.SwapWorkingDirectory (path); + } + return SendOKResponse (); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qGetWorkingDir (StringExtractorGDBRemote &packet) +{ + StreamString response; + + if (m_is_platform) + { + // If this packet is sent to a platform, then change the current working directory + char cwd[PATH_MAX]; + if (getcwd(cwd, sizeof(cwd)) == NULL) + { + return SendErrorResponse(errno); + } + else + { + response.PutBytesAsRawHex8(cwd, strlen(cwd)); + return SendPacketNoLock(response.GetData(), response.GetSize()); + } + } + else + { + const char *working_dir = m_process_launch_info.GetWorkingDirectory(); + if (working_dir && working_dir[0]) + { + response.PutBytesAsRawHex8(working_dir, strlen(working_dir)); + return SendPacketNoLock(response.GetData(), response.GetSize()); + } + else + { + return SendErrorResponse(14); + } + } +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_QSetSTDIN (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen ("QSetSTDIN:")); + ProcessLaunchInfo::FileAction file_action; + std::string path; + packet.GetHexByteString(path); + const bool read = false; + const bool write = true; + if (file_action.Open(STDIN_FILENO, path.c_str(), read, write)) + { + m_process_launch_info.AppendFileAction(file_action); + return SendOKResponse (); + } + return SendErrorResponse (15); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_QSetSTDOUT (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen ("QSetSTDOUT:")); + ProcessLaunchInfo::FileAction file_action; + std::string path; + packet.GetHexByteString(path); + const bool read = true; + const bool write = false; + if (file_action.Open(STDOUT_FILENO, path.c_str(), read, write)) + { + m_process_launch_info.AppendFileAction(file_action); + return SendOKResponse (); + } + return SendErrorResponse (16); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_QSetSTDERR (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen ("QSetSTDERR:")); + ProcessLaunchInfo::FileAction file_action; + std::string path; + packet.GetHexByteString(path); + const bool read = true; + const bool write = false; + if (file_action.Open(STDERR_FILENO, path.c_str(), read, write)) + { + m_process_launch_info.AppendFileAction(file_action); + return SendOKResponse (); + } + return SendErrorResponse (17); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_C (StringExtractorGDBRemote &packet) +{ + if (!IsGdbServer ()) + return SendUnimplementedResponse (packet.GetStringRef().c_str()); + + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD)); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__); + + // Ensure we have a native process. + if (!m_debugged_process_sp) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s no debugged process shared pointer", __FUNCTION__); + return SendErrorResponse (0x36); + } + + // Pull out the signal number. + packet.SetFilePos (::strlen ("C")); + if (packet.GetBytesLeft () < 1) + { + // Shouldn't be using a C without a signal. + return SendIllFormedResponse (packet, "C packet specified without signal."); + } + const uint32_t signo = packet.GetHexMaxU32 (false, std::numeric_limits::max ()); + if (signo == std::numeric_limits::max ()) + return SendIllFormedResponse (packet, "failed to parse signal number"); + + // Handle optional continue address. + if (packet.GetBytesLeft () > 0) + { + // FIXME add continue at address support for $C{signo}[;{continue-address}]. + if (*packet.Peek () == ';') + return SendUnimplementedResponse (packet.GetStringRef().c_str()); + else + return SendIllFormedResponse (packet, "unexpected content after $C{signal-number}"); + } + + lldb_private::ResumeActionList resume_actions (StateType::eStateRunning, 0); + Error error; + + // We have two branches: what to do if a continue thread is specified (in which case we target + // sending the signal to that thread), or when we don't have a continue thread set (in which + // case we send a signal to the process). + + // TODO discuss with Greg Clayton, make sure this makes sense. + + lldb::tid_t signal_tid = GetContinueThreadID (); + if (signal_tid != LLDB_INVALID_THREAD_ID) + { + // The resume action for the continue thread (or all threads if a continue thread is not set). + lldb_private::ResumeAction action = { GetContinueThreadID (), StateType::eStateRunning, static_cast (signo) }; + + // Add the action for the continue thread (or all threads when the continue thread isn't present). + resume_actions.Append (action); + } + else + { + // Send the signal to the process since we weren't targeting a specific continue thread with the signal. + error = m_debugged_process_sp->Signal (signo); + if (error.Fail ()) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed to send signal for process %" PRIu64 ": %s", + __FUNCTION__, + m_debugged_process_sp->GetID (), + error.AsCString ()); + + return SendErrorResponse (0x52); + } + } + + // Resume the threads. + error = m_debugged_process_sp->Resume (resume_actions); + if (error.Fail ()) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed to resume threads for process %" PRIu64 ": %s", + __FUNCTION__, + m_debugged_process_sp->GetID (), + error.AsCString ()); + + return SendErrorResponse (0x38); + } + + // Don't send an "OK" packet; response is the stopped/exited message. + return PacketResult::Success; +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_c (StringExtractorGDBRemote &packet, bool skip_file_pos_adjustment) +{ + if (!IsGdbServer ()) + return SendUnimplementedResponse (packet.GetStringRef().c_str()); + + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD)); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__); + + // We reuse this method in vCont - don't double adjust the file position. + if (!skip_file_pos_adjustment) + packet.SetFilePos (::strlen ("c")); + + // For now just support all continue. + const bool has_continue_address = (packet.GetBytesLeft () > 0); + if (has_continue_address) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s not implemented for c{address} variant [%s remains]", __FUNCTION__, packet.Peek ()); + return SendUnimplementedResponse (packet.GetStringRef().c_str()); + } + + // Ensure we have a native process. + if (!m_debugged_process_sp) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s no debugged process shared pointer", __FUNCTION__); + return SendErrorResponse (0x36); + } + + // Build the ResumeActionList + lldb_private::ResumeActionList actions (StateType::eStateRunning, 0); + + Error error = m_debugged_process_sp->Resume (actions); + if (error.Fail ()) + { + if (log) + { + log->Printf ("GDBRemoteCommunicationServer::%s c failed for process %" PRIu64 ": %s", + __FUNCTION__, + m_debugged_process_sp->GetID (), + error.AsCString ()); + } + return SendErrorResponse (GDBRemoteServerError::eErrorResume); + } + + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s continued process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ()); + + // No response required from continue. + return PacketResult::Success; +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_vCont_actions (StringExtractorGDBRemote &packet) +{ + if (!IsGdbServer ()) + { + // only llgs supports $vCont. + return SendUnimplementedResponse (packet.GetStringRef().c_str()); + } + + // We handle $vCont messages for c. + // TODO add C, s and S. + StreamString response; + response.Printf("vCont;c;C;s;S"); + + return SendPacketNoLock(response.GetData(), response.GetSize()); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_vCont (StringExtractorGDBRemote &packet) +{ + if (!IsGdbServer ()) + { + // only llgs supports $vCont + return SendUnimplementedResponse (packet.GetStringRef().c_str()); + } + + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s handling vCont packet", __FUNCTION__); + + packet.SetFilePos (::strlen ("vCont")); + + // Check if this is all continue (no options or ";c"). + if (!packet.GetBytesLeft () || (::strcmp (packet.Peek (), ";c") == 0)) + { + // Move the packet past the ";c". + if (packet.GetBytesLeft ()) + packet.SetFilePos (packet.GetFilePos () + ::strlen (";c")); + + const bool skip_file_pos_adjustment = true; + return Handle_c (packet, skip_file_pos_adjustment); + } + else if (::strcmp (packet.Peek (), ";s") == 0) + { + // Move past the ';', then do a simple 's'. + packet.SetFilePos (packet.GetFilePos () + 1); + return Handle_s (packet); + } + + // Ensure we have a native process. + if (!m_debugged_process_sp) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s no debugged process shared pointer", __FUNCTION__); + return SendErrorResponse (0x36); + } + + ResumeActionList thread_actions; + + while (packet.GetBytesLeft () && *packet.Peek () == ';') + { + // Skip the semi-colon. + packet.GetChar (); + + // Build up the thread action. + ResumeAction thread_action; + thread_action.tid = LLDB_INVALID_THREAD_ID; + thread_action.state = eStateInvalid; + thread_action.signal = 0; + + const char action = packet.GetChar (); + switch (action) + { + case 'C': + thread_action.signal = packet.GetHexMaxU32 (false, 0); + if (thread_action.signal == 0) + return SendIllFormedResponse (packet, "Could not parse signal in vCont packet C action"); + // Fall through to next case... + + case 'c': + // Continue + thread_action.state = eStateRunning; + break; + + case 'S': + thread_action.signal = packet.GetHexMaxU32 (false, 0); + if (thread_action.signal == 0) + return SendIllFormedResponse (packet, "Could not parse signal in vCont packet S action"); + // Fall through to next case... + + case 's': + // Step + thread_action.state = eStateStepping; + break; + + default: + return SendIllFormedResponse (packet, "Unsupported vCont action"); + break; + } + + // Parse out optional :{thread-id} value. + if (packet.GetBytesLeft () && (*packet.Peek () == ':')) + { + // Consume the separator. + packet.GetChar (); + + thread_action.tid = packet.GetHexMaxU32 (false, LLDB_INVALID_THREAD_ID); + if (thread_action.tid == LLDB_INVALID_THREAD_ID) + return SendIllFormedResponse (packet, "Could not parse thread number in vCont packet"); + } + + thread_actions.Append (thread_action); + } + + // If a default action for all other threads wasn't mentioned + // then we should stop the threads. + thread_actions.SetDefaultThreadActionIfNeeded (eStateStopped, 0); + + Error error = m_debugged_process_sp->Resume (thread_actions); + if (error.Fail ()) + { + if (log) + { + log->Printf ("GDBRemoteCommunicationServer::%s vCont failed for process %" PRIu64 ": %s", + __FUNCTION__, + m_debugged_process_sp->GetID (), + error.AsCString ()); + } + return SendErrorResponse (GDBRemoteServerError::eErrorResume); + } + + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s continued process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ()); + + // No response required from vCont. + return PacketResult::Success; +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_QStartNoAckMode (StringExtractorGDBRemote &packet) +{ + // Send response first before changing m_send_acks to we ack this packet + PacketResult packet_result = SendOKResponse (); + m_send_acks = false; + return packet_result; +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qPlatform_mkdir (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen("qPlatform_mkdir:")); + mode_t mode = packet.GetHexMaxU32(false, UINT32_MAX); + if (packet.GetChar() == ',') + { + std::string path; + packet.GetHexByteString(path); + Error error = Host::MakeDirectory(path.c_str(),mode); + if (error.Success()) + return SendPacketNoLock ("OK", 2); + else + return SendErrorResponse(error.GetError()); + } + return SendErrorResponse(20); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qPlatform_chmod (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen("qPlatform_chmod:")); + + mode_t mode = packet.GetHexMaxU32(false, UINT32_MAX); + if (packet.GetChar() == ',') + { + std::string path; + packet.GetHexByteString(path); + Error error = Host::SetFilePermissions (path.c_str(), mode); + if (error.Success()) + return SendPacketNoLock ("OK", 2); + else + return SendErrorResponse(error.GetError()); + } + return SendErrorResponse(19); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_vFile_Open (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen("vFile:open:")); + std::string path; + packet.GetHexByteStringTerminatedBy(path,','); + if (!path.empty()) + { + if (packet.GetChar() == ',') + { + uint32_t flags = packet.GetHexMaxU32(false, 0); + if (packet.GetChar() == ',') + { + mode_t mode = packet.GetHexMaxU32(false, 0600); + Error error; + int fd = ::open (path.c_str(), flags, mode); + const int save_errno = fd == -1 ? errno : 0; + StreamString response; + response.PutChar('F'); + response.Printf("%i", fd); + if (save_errno) + response.Printf(",%i", save_errno); + return SendPacketNoLock(response.GetData(), response.GetSize()); + } + } + } + return SendErrorResponse(18); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_vFile_Close (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen("vFile:close:")); + int fd = packet.GetS32(-1); + Error error; + int err = -1; + int save_errno = 0; + if (fd >= 0) + { + err = close(fd); + save_errno = err == -1 ? errno : 0; + } + else + { + save_errno = EINVAL; + } + StreamString response; + response.PutChar('F'); + response.Printf("%i", err); + if (save_errno) + response.Printf(",%i", save_errno); + return SendPacketNoLock(response.GetData(), response.GetSize()); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_vFile_pRead (StringExtractorGDBRemote &packet) +{ +#ifdef _WIN32 + // Not implemented on Windows + return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_pRead() unimplemented"); +#else + StreamGDBRemote response; + packet.SetFilePos(::strlen("vFile:pread:")); + int fd = packet.GetS32(-1); + if (packet.GetChar() == ',') + { + uint64_t count = packet.GetU64(UINT64_MAX); + if (packet.GetChar() == ',') + { + uint64_t offset = packet.GetU64(UINT32_MAX); + if (count == UINT64_MAX) + { + response.Printf("F-1:%i", EINVAL); + return SendPacketNoLock(response.GetData(), response.GetSize()); + } + + std::string buffer(count, 0); + const ssize_t bytes_read = ::pread (fd, &buffer[0], buffer.size(), offset); + const int save_errno = bytes_read == -1 ? errno : 0; + response.PutChar('F'); + response.Printf("%zi", bytes_read); + if (save_errno) + response.Printf(",%i", save_errno); + else + { + response.PutChar(';'); + response.PutEscapedBytes(&buffer[0], bytes_read); + } + return SendPacketNoLock(response.GetData(), response.GetSize()); + } + } + return SendErrorResponse(21); + +#endif +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_vFile_pWrite (StringExtractorGDBRemote &packet) +{ +#ifdef _WIN32 + return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_pWrite() unimplemented"); +#else + packet.SetFilePos(::strlen("vFile:pwrite:")); + + StreamGDBRemote response; + response.PutChar('F'); + + int fd = packet.GetU32(UINT32_MAX); + if (packet.GetChar() == ',') + { + off_t offset = packet.GetU64(UINT32_MAX); + if (packet.GetChar() == ',') + { + std::string buffer; + if (packet.GetEscapedBinaryData(buffer)) + { + const ssize_t bytes_written = ::pwrite (fd, buffer.data(), buffer.size(), offset); + const int save_errno = bytes_written == -1 ? errno : 0; + response.Printf("%zi", bytes_written); + if (save_errno) + response.Printf(",%i", save_errno); + } + else + { + response.Printf ("-1,%i", EINVAL); + } + return SendPacketNoLock(response.GetData(), response.GetSize()); + } + } + return SendErrorResponse(27); +#endif +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_vFile_Size (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen("vFile:size:")); + std::string path; + packet.GetHexByteString(path); + if (!path.empty()) + { + lldb::user_id_t retcode = Host::GetFileSize(FileSpec(path.c_str(), false)); + StreamString response; + response.PutChar('F'); + response.PutHex64(retcode); + if (retcode == UINT64_MAX) + { + response.PutChar(','); + response.PutHex64(retcode); // TODO: replace with Host::GetSyswideErrorCode() + } + return SendPacketNoLock(response.GetData(), response.GetSize()); + } + return SendErrorResponse(22); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_vFile_Mode (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen("vFile:mode:")); + std::string path; + packet.GetHexByteString(path); + if (!path.empty()) + { + Error error; + const uint32_t mode = File::GetPermissions(path.c_str(), error); + StreamString response; + response.Printf("F%u", mode); + if (mode == 0 || error.Fail()) + response.Printf(",%i", (int)error.GetError()); + return SendPacketNoLock(response.GetData(), response.GetSize()); + } + return SendErrorResponse(23); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_vFile_Exists (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen("vFile:exists:")); + std::string path; + packet.GetHexByteString(path); + if (!path.empty()) + { + bool retcode = Host::GetFileExists(FileSpec(path.c_str(), false)); + StreamString response; + response.PutChar('F'); + response.PutChar(','); + if (retcode) + response.PutChar('1'); + else + response.PutChar('0'); + return SendPacketNoLock(response.GetData(), response.GetSize()); + } + return SendErrorResponse(24); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_vFile_symlink (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen("vFile:symlink:")); + std::string dst, src; + packet.GetHexByteStringTerminatedBy(dst, ','); + packet.GetChar(); // Skip ',' char + packet.GetHexByteString(src); + Error error = Host::Symlink(src.c_str(), dst.c_str()); + StreamString response; + response.Printf("F%u,%u", error.GetError(), error.GetError()); + return SendPacketNoLock(response.GetData(), response.GetSize()); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_vFile_unlink (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen("vFile:unlink:")); + std::string path; + packet.GetHexByteString(path); + Error error = Host::Unlink(path.c_str()); + StreamString response; + response.Printf("F%u,%u", error.GetError(), error.GetError()); + return SendPacketNoLock(response.GetData(), response.GetSize()); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qPlatform_shell (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen("qPlatform_shell:")); + std::string path; + std::string working_dir; + packet.GetHexByteStringTerminatedBy(path,','); + if (!path.empty()) + { + if (packet.GetChar() == ',') + { + // FIXME: add timeout to qPlatform_shell packet + // uint32_t timeout = packet.GetHexMaxU32(false, 32); + uint32_t timeout = 10; + if (packet.GetChar() == ',') + packet.GetHexByteString(working_dir); + int status, signo; + std::string output; + Error err = Host::RunShellCommand(path.c_str(), + working_dir.empty() ? NULL : working_dir.c_str(), + &status, &signo, &output, timeout); + StreamGDBRemote response; + if (err.Fail()) + { + response.PutCString("F,"); + response.PutHex32(UINT32_MAX); + } + else { - if (bytes_left >= 26) - { - response.PutCString("ABCDEFGHIJKLMNOPQRSTUVWXYZ"); - bytes_left -= 26; - } - else - { - response.Printf ("%*.*s;", bytes_left, bytes_left, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"); - bytes_left = 0; - } + response.PutCString("F,"); + response.PutHex32(status); + response.PutChar(','); + response.PutHex32(signo); + response.PutChar(','); + response.PutEscapedBytes(output.c_str(), output.size()); } - return SendPacketNoLock (response.GetData(), response.GetSize()); + return SendPacketNoLock(response.GetData(), response.GetSize()); } } - return SendErrorResponse (7); + return SendErrorResponse(24); } -// -//static bool -//WaitForProcessToSIGSTOP (const lldb::pid_t pid, const int timeout_in_seconds) -//{ -// const int time_delta_usecs = 100000; -// const int num_retries = timeout_in_seconds/time_delta_usecs; -// for (int i=0; iPrintf ("GDBRemoteCommunicationServer::%s setting current thread id to %" PRIu64, __FUNCTION__, tid); + + m_current_tid = tid; + if (m_debugged_process_sp) + m_debugged_process_sp->SetCurrentThreadID (m_current_tid); +} + +void +GDBRemoteCommunicationServer::SetContinueThreadID (lldb::tid_t tid) +{ + assert (IsGdbServer () && "SetContinueThreadID() called when not GdbServer code"); + + Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_THREAD)); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s setting continue thread id to %" PRIu64, __FUNCTION__, tid); + + m_continue_tid = tid; +} GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_A (StringExtractorGDBRemote &packet) +GDBRemoteCommunicationServer::Handle_stop_reason (StringExtractorGDBRemote &packet) { - // The 'A' packet is the most over designed packet ever here with - // redundant argument indexes, redundant argument lengths and needed hex - // encoded argument string values. Really all that is needed is a comma - // separated hex encoded argument value list, but we will stay true to the - // documented version of the 'A' packet here... + // Handle the $? gdbremote command. + if (!IsGdbServer ()) + return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_stop_reason() unimplemented"); - packet.SetFilePos(1); // Skip the 'A' - bool success = true; - while (success && packet.GetBytesLeft() > 0) + // If no process, indicate error + if (!m_debugged_process_sp) + return SendErrorResponse (02); + + return SendStopReasonForState (m_debugged_process_sp->GetState (), true); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::SendStopReasonForState (lldb::StateType process_state, bool flush_on_exit) +{ + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); + + switch (process_state) { - // Decode the decimal argument string length. This length is the - // number of hex nibbles in the argument string value. - const uint32_t arg_len = packet.GetU32(UINT32_MAX); - if (arg_len == UINT32_MAX) - success = false; - else + case eStateAttaching: + case eStateLaunching: + case eStateRunning: + case eStateStepping: + case eStateDetached: + // NOTE: gdb protocol doc looks like it should return $OK + // when everything is running (i.e. no stopped result). + return PacketResult::Success; // Ignore + + case eStateSuspended: + case eStateStopped: + case eStateCrashed: { - // Make sure the argument hex string length is followed by a comma - if (packet.GetChar() != ',') - success = false; - else - { - // Decode the argument index. We ignore this really becuase - // who would really send down the arguments in a random order??? - const uint32_t arg_idx = packet.GetU32(UINT32_MAX); - if (arg_idx == UINT32_MAX) - success = false; - else - { - // Make sure the argument index is followed by a comma - if (packet.GetChar() != ',') - success = false; - else - { - // Decode the argument string value from hex bytes - // back into a UTF8 string and make sure the length - // matches the one supplied in the packet - std::string arg; - if (packet.GetHexByteString(arg) != (arg_len / 2)) - success = false; - else - { - // If there are any bytes lft - if (packet.GetBytesLeft()) - { - if (packet.GetChar() != ',') - success = false; - } + lldb::tid_t tid = m_debugged_process_sp->GetCurrentThreadID (); + // Make sure we set the current thread so g and p packets return + // the data the gdb will expect. + SetCurrentThreadID (tid); + return SendStopReplyPacketForThread (tid); + } - if (success) - { - if (arg_idx == 0) - m_process_launch_info.GetExecutableFile().SetFile(arg.c_str(), false); - m_process_launch_info.GetArguments().AppendArgument(arg.c_str()); - } - } - } - } + case eStateInvalid: + case eStateUnloaded: + case eStateExited: + if (flush_on_exit) + FlushInferiorOutput (); + return SendWResponse(m_debugged_process_sp.get()); + + default: + if (log) + { + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 ", current state reporting not handled: %s", + __FUNCTION__, + m_debugged_process_sp->GetID (), + StateAsCString (process_state)); } - } + break; } + + return SendErrorResponse (0); +} - if (success) +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_vFile_Stat (StringExtractorGDBRemote &packet) +{ + return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_Stat() unimplemented"); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_vFile_MD5 (StringExtractorGDBRemote &packet) +{ + packet.SetFilePos(::strlen("vFile:MD5:")); + std::string path; + packet.GetHexByteString(path); + if (!path.empty()) { - // FIXME: remove linux restriction once eLaunchFlagDebug is supported -#if !defined (__linux__) - m_process_launch_info.GetFlags().Set (eLaunchFlagDebug); -#endif - m_process_launch_error = LaunchProcess (); - if (m_process_launch_info.GetProcessID() != LLDB_INVALID_PROCESS_ID) + uint64_t a,b; + StreamGDBRemote response; + if (Host::CalculateMD5(FileSpec(path.c_str(),false),a,b) == false) { - return SendOKResponse (); + response.PutCString("F,"); + response.PutCString("x"); + } + else + { + response.PutCString("F,"); + response.PutHex64(a); + response.PutHex64(b); } + return SendPacketNoLock(response.GetData(), response.GetSize()); } - return SendErrorResponse (8); + return SendErrorResponse(25); } GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_qC (StringExtractorGDBRemote &packet) +GDBRemoteCommunicationServer::Handle_qRegisterInfo (StringExtractorGDBRemote &packet) { - lldb::pid_t pid = m_process_launch_info.GetProcessID(); - StreamString response; - response.Printf("QC%" PRIx64, pid); - if (m_is_platform) + // Ensure we're llgs. + if (!IsGdbServer()) + return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_qRegisterInfo() unimplemented"); + + // Fail if we don't have a current process. + if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) + return SendErrorResponse (68); + + // Ensure we have a thread. + NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadAtIndex (0)); + if (!thread_sp) + return SendErrorResponse (69); + + // Get the register context for the first thread. + NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); + if (!reg_context_sp) + return SendErrorResponse (69); + + // Parse out the register number from the request. + packet.SetFilePos (strlen("qRegisterInfo")); + const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits::max ()); + if (reg_index == std::numeric_limits::max ()) + return SendErrorResponse (69); + + // Return the end of registers response if we've iterated one past the end of the register set. + if (reg_index >= reg_context_sp->GetRegisterCount ()) + return SendErrorResponse (69); + + const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex(reg_index); + if (!reg_info) + return SendErrorResponse (69); + + // Build the reginfos response. + StreamGDBRemote response; + + response.PutCString ("name:"); + response.PutCString (reg_info->name); + response.PutChar (';'); + + if (reg_info->alt_name && reg_info->alt_name[0]) + { + response.PutCString ("alt-name:"); + response.PutCString (reg_info->alt_name); + response.PutChar (';'); + } + + response.Printf ("bitsize:%" PRIu32 ";offset:%" PRIu32 ";", reg_info->byte_size * 8, reg_info->byte_offset); + + switch (reg_info->encoding) + { + case eEncodingUint: response.PutCString ("encoding:uint;"); break; + case eEncodingSint: response.PutCString ("encoding:sint;"); break; + case eEncodingIEEE754: response.PutCString ("encoding:ieee754;"); break; + case eEncodingVector: response.PutCString ("encoding:vector;"); break; + default: break; + } + + switch (reg_info->format) + { + case eFormatBinary: response.PutCString ("format:binary;"); break; + case eFormatDecimal: response.PutCString ("format:decimal;"); break; + case eFormatHex: response.PutCString ("format:hex;"); break; + case eFormatFloat: response.PutCString ("format:float;"); break; + case eFormatVectorOfSInt8: response.PutCString ("format:vector-sint8;"); break; + case eFormatVectorOfUInt8: response.PutCString ("format:vector-uint8;"); break; + case eFormatVectorOfSInt16: response.PutCString ("format:vector-sint16;"); break; + case eFormatVectorOfUInt16: response.PutCString ("format:vector-uint16;"); break; + case eFormatVectorOfSInt32: response.PutCString ("format:vector-sint32;"); break; + case eFormatVectorOfUInt32: response.PutCString ("format:vector-uint32;"); break; + case eFormatVectorOfFloat32: response.PutCString ("format:vector-float32;"); break; + case eFormatVectorOfUInt128: response.PutCString ("format:vector-uint128;"); break; + default: break; + }; + + const char *const register_set_name = reg_context_sp->GetRegisterSetNameForRegisterAtIndex(reg_index); + if (register_set_name) + { + response.PutCString ("set:"); + response.PutCString (register_set_name); + response.PutChar (';'); + } + + if (reg_info->kinds[RegisterKind::eRegisterKindGCC] != LLDB_INVALID_REGNUM) + response.Printf ("gcc:%" PRIu32 ";", reg_info->kinds[RegisterKind::eRegisterKindGCC]); + + if (reg_info->kinds[RegisterKind::eRegisterKindDWARF] != LLDB_INVALID_REGNUM) + response.Printf ("dwarf:%" PRIu32 ";", reg_info->kinds[RegisterKind::eRegisterKindDWARF]); + + switch (reg_info->kinds[RegisterKind::eRegisterKindGeneric]) { - // If we launch a process and this GDB server is acting as a platform, - // then we need to clear the process launch state so we can start - // launching another process. In order to launch a process a bunch or - // packets need to be sent: environment packets, working directory, - // disable ASLR, and many more settings. When we launch a process we - // then need to know when to clear this information. Currently we are - // selecting the 'qC' packet as that packet which seems to make the most - // sense. - if (pid != LLDB_INVALID_PROCESS_ID) + case LLDB_REGNUM_GENERIC_PC: response.PutCString("generic:pc;"); break; + case LLDB_REGNUM_GENERIC_SP: response.PutCString("generic:sp;"); break; + case LLDB_REGNUM_GENERIC_FP: response.PutCString("generic:fp;"); break; + case LLDB_REGNUM_GENERIC_RA: response.PutCString("generic:ra;"); break; + case LLDB_REGNUM_GENERIC_FLAGS: response.PutCString("generic:flags;"); break; + case LLDB_REGNUM_GENERIC_ARG1: response.PutCString("generic:arg1;"); break; + case LLDB_REGNUM_GENERIC_ARG2: response.PutCString("generic:arg2;"); break; + case LLDB_REGNUM_GENERIC_ARG3: response.PutCString("generic:arg3;"); break; + case LLDB_REGNUM_GENERIC_ARG4: response.PutCString("generic:arg4;"); break; + case LLDB_REGNUM_GENERIC_ARG5: response.PutCString("generic:arg5;"); break; + case LLDB_REGNUM_GENERIC_ARG6: response.PutCString("generic:arg6;"); break; + case LLDB_REGNUM_GENERIC_ARG7: response.PutCString("generic:arg7;"); break; + case LLDB_REGNUM_GENERIC_ARG8: response.PutCString("generic:arg8;"); break; + default: break; + } + + if (reg_info->value_regs && reg_info->value_regs[0] != LLDB_INVALID_REGNUM) + { + response.PutCString ("container-regs:"); + int i = 0; + for (const uint32_t *reg_num = reg_info->value_regs; *reg_num != LLDB_INVALID_REGNUM; ++reg_num, ++i) { - m_process_launch_info.Clear(); + if (i > 0) + response.PutChar (','); + response.Printf ("%" PRIx32, *reg_num); } + response.PutChar (';'); } - return SendPacketNoLock (response.GetData(), response.GetSize()); -} -bool -GDBRemoteCommunicationServer::DebugserverProcessReaped (lldb::pid_t pid) -{ - Mutex::Locker locker (m_spawned_pids_mutex); - FreePortForProcess(pid); - return m_spawned_pids.erase(pid) > 0; + if (reg_info->invalidate_regs && reg_info->invalidate_regs[0]) + { + response.PutCString ("invalidate-regs:"); + int i = 0; + for (const uint32_t *reg_num = reg_info->invalidate_regs; *reg_num != LLDB_INVALID_REGNUM; ++reg_num, ++i) + { + if (i > 0) + response.PutChar (','); + response.Printf ("%" PRIx32, *reg_num); + } + response.PutChar (';'); + } + + return SendPacketNoLock(response.GetData(), response.GetSize()); } -bool -GDBRemoteCommunicationServer::ReapDebugserverProcess (void *callback_baton, - lldb::pid_t pid, - bool exited, - int signal, // Zero for no signal - int status) // Exit value of process if signal is zero + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qfThreadInfo (StringExtractorGDBRemote &packet) { - GDBRemoteCommunicationServer *server = (GDBRemoteCommunicationServer *)callback_baton; - server->DebugserverProcessReaped (pid); - return true; + // Ensure we're llgs. + if (!IsGdbServer()) + return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_qfThreadInfo() unimplemented"); + + // Fail if we don't have a current process. + if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) + return SendErrorResponse (68); + + StreamGDBRemote response; + response.PutChar ('m'); + + NativeThreadProtocolSP thread_sp; + uint32_t thread_index; + for (thread_index = 0, thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index); + thread_sp; + ++thread_index, thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index)) + { + if (thread_index > 0) + response.PutChar(','); + response.Printf ("%" PRIx64, thread_sp->GetID ()); + } + + return SendPacketNoLock(response.GetData(), response.GetSize()); } -bool -GDBRemoteCommunicationServer::DebuggedProcessReaped (lldb::pid_t pid) +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_qsThreadInfo (StringExtractorGDBRemote &packet) { - // reap a process that we were debugging (but not debugserver) - Mutex::Locker locker (m_spawned_pids_mutex); - return m_spawned_pids.erase(pid) > 0; + // Ensure we're llgs. + if (!IsGdbServer()) + return SendUnimplementedResponse ("GDBRemoteCommunicationServer::Handle_qsThreadInfo() unimplemented"); + + // FIXME for now we return the full thread list in the initial packet and always do nothing here. + return SendPacketNoLock ("l", 1); } -bool -GDBRemoteCommunicationServer::ReapDebuggedProcess (void *callback_baton, - lldb::pid_t pid, - bool exited, - int signal, // Zero for no signal - int status) // Exit value of process if signal is zero +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::Handle_p (StringExtractorGDBRemote &packet) { - GDBRemoteCommunicationServer *server = (GDBRemoteCommunicationServer *)callback_baton; - server->DebuggedProcessReaped (pid); - return true; + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); + + // Ensure we're llgs. + if (!IsGdbServer()) + return SendUnimplementedResponse ("GDBRemoteCommunicationServer::Handle_p() unimplemented"); + + // Parse out the register number from the request. + packet.SetFilePos (strlen("p")); + const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits::max ()); + if (reg_index == std::numeric_limits::max ()) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, could not parse register number from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ()); + return SendErrorResponse (0x15); + } + + // Get the thread to use. + NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet); + if (!thread_sp) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, no thread available", __FUNCTION__); + return SendErrorResponse (0x15); + } + + // Get the thread's register context. + NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); + if (!reg_context_sp) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ()); + return SendErrorResponse (0x15); + } + + // Return the end of registers response if we've iterated one past the end of the register set. + if (reg_index >= reg_context_sp->GetRegisterCount ()) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " beyond register count %" PRIu32, __FUNCTION__, reg_index, reg_context_sp->GetRegisterCount ()); + return SendErrorResponse (0x15); + } + + const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex(reg_index); + if (!reg_info) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " returned NULL", __FUNCTION__, reg_index); + return SendErrorResponse (0x15); + } + + // Build the reginfos response. + StreamGDBRemote response; + + // Retrieve the value + RegisterValue reg_value; + Error error = reg_context_sp->ReadRegister (reg_info, reg_value); + if (error.Fail ()) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, read of requested register %" PRIu32 " (%s) failed: %s", __FUNCTION__, reg_index, reg_info->name, error.AsCString ()); + return SendErrorResponse (0x15); + } + + const uint8_t *const data = reinterpret_cast (reg_value.GetBytes ()); + if (!data) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed to get data bytes from requested register %" PRIu32, __FUNCTION__, reg_index); + return SendErrorResponse (0x15); + } + + // FIXME flip as needed to get data in big/little endian format for this host. + for (uint32_t i = 0; i < reg_value.GetByteSize (); ++i) + response.PutHex8 (data[i]); + + return SendPacketNoLock (response.GetData (), response.GetSize ()); } GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_qLaunchGDBServer (StringExtractorGDBRemote &packet) +GDBRemoteCommunicationServer::Handle_P (StringExtractorGDBRemote &packet) { -#ifdef _WIN32 - return SendErrorResponse(9); -#else - // Spawn a local debugserver as a platform so we can then attach or launch - // a process... + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); - if (m_is_platform) + // Ensure we're llgs. + if (!IsGdbServer()) + return SendUnimplementedResponse ("GDBRemoteCommunicationServer::Handle_P() unimplemented"); + + // Ensure there is more content. + if (packet.GetBytesLeft () < 1) + return SendIllFormedResponse (packet, "Empty P packet"); + + // Parse out the register number from the request. + packet.SetFilePos (strlen("P")); + const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits::max ()); + if (reg_index == std::numeric_limits::max ()) { - // Sleep and wait a bit for debugserver to start to listen... - ConnectionFileDescriptor file_conn; - Error error; - std::string hostname; - // TODO: /tmp/ should not be hardcoded. User might want to override /tmp - // with the TMPDIR environnement variable - packet.SetFilePos(::strlen ("qLaunchGDBServer;")); - std::string name; - std::string value; - uint16_t port = UINT16_MAX; - while (packet.GetNameColonValue(name, value)) - { - if (name.compare ("host") == 0) - hostname.swap(value); - else if (name.compare ("port") == 0) - port = Args::StringToUInt32(value.c_str(), 0, 0); - } - if (port == UINT16_MAX) - port = GetNextAvailablePort(); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, could not parse register number from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ()); + return SendErrorResponse (0x29); + } - // Spawn a new thread to accept the port that gets bound after - // binding to port 0 (zero). + // Note debugserver would send an E30 here. + if ((packet.GetBytesLeft () < 1) || (packet.GetChar () != '=')) + return SendIllFormedResponse (packet, "P packet missing '=' char after register number"); - if (error.Success()) - { - // Spawn a debugserver and try to get the port it listens to. - ProcessLaunchInfo debugserver_launch_info; - if (hostname.empty()) - hostname = "127.0.0.1"; - Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM)); - if (log) - log->Printf("Launching debugserver with: %s:%u...\n", hostname.c_str(), port); + // Get process architecture. + ArchSpec process_arch; + if (!m_debugged_process_sp || !m_debugged_process_sp->GetArchitecture (process_arch)) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed to retrieve inferior architecture", __FUNCTION__); + return SendErrorResponse (0x49); + } - debugserver_launch_info.SetMonitorProcessCallback(ReapDebugserverProcess, this, false); - - error = StartDebugserverProcess (hostname.empty() ? NULL : hostname.c_str(), - port, - debugserver_launch_info, - port); + // Parse out the value. + const uint64_t raw_value = packet.GetHexMaxU64 (process_arch.GetByteOrder () == lldb::eByteOrderLittle, std::numeric_limits::max ()); - lldb::pid_t debugserver_pid = debugserver_launch_info.GetProcessID(); + // Get the thread to use. + NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet); + if (!thread_sp) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, no thread available (thread index 0)", __FUNCTION__); + return SendErrorResponse (0x28); + } + // Get the thread's register context. + NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); + if (!reg_context_sp) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ()); + return SendErrorResponse (0x15); + } - if (debugserver_pid != LLDB_INVALID_PROCESS_ID) - { - Mutex::Locker locker (m_spawned_pids_mutex); - m_spawned_pids.insert(debugserver_pid); - if (port > 0) - AssociatePortWithProcess(port, debugserver_pid); - } - else - { - if (port > 0) - FreePort (port); - } + const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex(reg_index); + if (!reg_info) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " returned NULL", __FUNCTION__, reg_index); + return SendErrorResponse (0x48); + } - if (error.Success()) - { - char response[256]; - const int response_len = ::snprintf (response, sizeof(response), "pid:%" PRIu64 ";port:%u;", debugserver_pid, port + m_port_offset); - assert (response_len < (int)sizeof(response)); - PacketResult packet_result = SendPacketNoLock (response, response_len); + // Return the end of registers response if we've iterated one past the end of the register set. + if (reg_index >= reg_context_sp->GetRegisterCount ()) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " beyond register count %" PRIu32, __FUNCTION__, reg_index, reg_context_sp->GetRegisterCount ()); + return SendErrorResponse (0x47); + } - if (packet_result != PacketResult::Success) - { - if (debugserver_pid != LLDB_INVALID_PROCESS_ID) - ::kill (debugserver_pid, SIGINT); - } - return packet_result; - } - } + + // Build the reginfos response. + StreamGDBRemote response; + + // FIXME Could be suffixed with a thread: parameter. + // That thread then needs to be fed back into the reg context retrieval above. + Error error = reg_context_sp->WriteRegisterFromUnsigned (reg_info, raw_value); + if (error.Fail ()) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, write of requested register %" PRIu32 " (%s) failed: %s", __FUNCTION__, reg_index, reg_info->name, error.AsCString ()); + return SendErrorResponse (0x32); } - return SendErrorResponse (9); -#endif + + return SendOKResponse(); } -bool -GDBRemoteCommunicationServer::KillSpawnedProcess (lldb::pid_t pid) +GDBRemoteCommunicationServer::PacketResult +GDBRemoteCommunicationServer::Handle_H (StringExtractorGDBRemote &packet) { - // make sure we know about this process + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); + + // Ensure we're llgs. + if (!IsGdbServer()) + return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_H() unimplemented"); + + // Fail if we don't have a current process. + if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) { - Mutex::Locker locker (m_spawned_pids_mutex); - if (m_spawned_pids.find(pid) == m_spawned_pids.end()) - return false; + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); + return SendErrorResponse (0x15); } - // first try a SIGTERM (standard kill) - Host::Kill (pid, SIGTERM); - - // check if that worked - for (size_t i=0; i<10; ++i) + // Parse out which variant of $H is requested. + packet.SetFilePos (strlen("H")); + if (packet.GetBytesLeft () < 1) { - { - Mutex::Locker locker (m_spawned_pids_mutex); - if (m_spawned_pids.find(pid) == m_spawned_pids.end()) - { - // it is now killed - return true; - } - } - usleep (10000); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, H command missing {g,c} variant", __FUNCTION__); + return SendIllFormedResponse (packet, "H command missing {g,c} variant"); } - // check one more time after the final usleep + const char h_variant = packet.GetChar (); + switch (h_variant) { - Mutex::Locker locker (m_spawned_pids_mutex); - if (m_spawned_pids.find(pid) == m_spawned_pids.end()) - return true; + case 'g': + break; + + case 'c': + break; + + default: + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, invalid $H variant %c", __FUNCTION__, h_variant); + return SendIllFormedResponse (packet, "H variant unsupported, should be c or g"); } - // the launched process still lives. Now try killling it again, - // this time with an unblockable signal. - Host::Kill (pid, SIGKILL); + // Parse out the thread number. + // FIXME return a parse success/fail value. All values are valid here. + const lldb::tid_t tid = packet.GetHexMaxU64 (false, std::numeric_limits::max ()); - for (size_t i=0; i<10; ++i) + // Ensure we have the given thread when not specifying -1 (all threads) or 0 (any thread). + if (tid != LLDB_INVALID_THREAD_ID && tid != 0) { + NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadByID (tid)); + if (!thread_sp) { - Mutex::Locker locker (m_spawned_pids_mutex); - if (m_spawned_pids.find(pid) == m_spawned_pids.end()) - { - // it is now killed - return true; - } + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, tid %" PRIu64 " not found", __FUNCTION__, tid); + return SendErrorResponse (0x15); } - usleep (10000); } - // check one more time after the final usleep - // Scope for locker + // Now switch the given thread type. + switch (h_variant) { - Mutex::Locker locker (m_spawned_pids_mutex); - if (m_spawned_pids.find(pid) == m_spawned_pids.end()) - return true; + case 'g': + SetCurrentThreadID (tid); + break; + + case 'c': + SetContinueThreadID (tid); + break; + + default: + assert (false && "unsupported $H variant - shouldn't get here"); + return SendIllFormedResponse (packet, "H variant unsupported, should be c or g"); } - // no luck - the process still lives - return false; + return SendOKResponse(); } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_qKillSpawnedProcess (StringExtractorGDBRemote &packet) +GDBRemoteCommunicationServer::PacketResult +GDBRemoteCommunicationServer::Handle_interrupt (StringExtractorGDBRemote &packet) { - packet.SetFilePos(::strlen ("qKillSpawnedProcess:")); + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD)); - lldb::pid_t pid = packet.GetU64(LLDB_INVALID_PROCESS_ID); + // Ensure we're llgs. + if (!IsGdbServer()) + { + // Only supported on llgs + return SendUnimplementedResponse (""); + } - // verify that we know anything about this pid. - // Scope for locker + // Fail if we don't have a current process. + if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) { - Mutex::Locker locker (m_spawned_pids_mutex); - if (m_spawned_pids.find(pid) == m_spawned_pids.end()) + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); + return SendErrorResponse (0x15); + } + + // Build the ResumeActionList - stop everything. + lldb_private::ResumeActionList actions (StateType::eStateStopped, 0); + + Error error = m_debugged_process_sp->Resume (actions); + if (error.Fail ()) + { + if (log) { - // not a pid we know about - return SendErrorResponse (10); + log->Printf ("GDBRemoteCommunicationServer::%s failed for process %" PRIu64 ": %s", + __FUNCTION__, + m_debugged_process_sp->GetID (), + error.AsCString ()); } + return SendErrorResponse (GDBRemoteServerError::eErrorResume); } - // go ahead and attempt to kill the spawned process - if (KillSpawnedProcess (pid)) - return SendOKResponse (); - else - return SendErrorResponse (11); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s stopped process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ()); + + // No response required from stop all. + return PacketResult::Success; } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_k (StringExtractorGDBRemote &packet) +GDBRemoteCommunicationServer::PacketResult +GDBRemoteCommunicationServer::Handle_m (StringExtractorGDBRemote &packet) { - // ignore for now if we're lldb_platform - if (m_is_platform) - return SendUnimplementedResponse (packet.GetStringRef().c_str()); + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); - // shutdown all spawned processes - std::set spawned_pids_copy; + // Ensure we're llgs. + if (!IsGdbServer()) + { + // Only supported on llgs + return SendUnimplementedResponse (""); + } - // copy pids + if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) { - Mutex::Locker locker (m_spawned_pids_mutex); - spawned_pids_copy.insert (m_spawned_pids.begin (), m_spawned_pids.end ()); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); + return SendErrorResponse (0x15); } - // nuke the spawned processes - for (auto it = spawned_pids_copy.begin (); it != spawned_pids_copy.end (); ++it) + // Parse out the memory address. + packet.SetFilePos (strlen("m")); + if (packet.GetBytesLeft() < 1) + return SendIllFormedResponse(packet, "Too short m packet"); + + // Read the address. Punting on validation. + // FIXME replace with Hex U64 read with no default value that fails on failed read. + const lldb::addr_t read_addr = packet.GetHexMaxU64(false, 0); + + // Validate comma. + if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ',')) + return SendIllFormedResponse(packet, "Comma sep missing in m packet"); + + // Get # bytes to read. + if (packet.GetBytesLeft() < 1) + return SendIllFormedResponse(packet, "Length missing in m packet"); + + const uint64_t byte_count = packet.GetHexMaxU64(false, 0); + if (byte_count == 0) { - lldb::pid_t spawned_pid = *it; - if (!KillSpawnedProcess (spawned_pid)) - { - fprintf (stderr, "%s: failed to kill spawned pid %" PRIu64 ", ignoring.\n", __FUNCTION__, spawned_pid); - } + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s nothing to read: zero-length packet", __FUNCTION__); + return PacketResult::Success; } - // TODO figure out how to shut down gracefully at this point - return SendOKResponse (); -} + // Allocate the response buffer. + std::string buf(byte_count, '\0'); + if (buf.empty()) + return SendErrorResponse (0x78); -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_qLaunchSuccess (StringExtractorGDBRemote &packet) -{ - if (m_process_launch_error.Success()) - return SendOKResponse(); - StreamString response; - response.PutChar('E'); - response.PutCString(m_process_launch_error.AsCString("")); - return SendPacketNoLock (response.GetData(), response.GetSize()); -} -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_QEnvironment (StringExtractorGDBRemote &packet) -{ - packet.SetFilePos(::strlen ("QEnvironment:")); - const uint32_t bytes_left = packet.GetBytesLeft(); - if (bytes_left > 0) + // Retrieve the process memory. + lldb::addr_t bytes_read = 0; + lldb_private::Error error = m_debugged_process_sp->ReadMemory (read_addr, &buf[0], byte_count, bytes_read); + if (error.Fail ()) { - m_process_launch_info.GetEnvironmentEntries ().AppendArgument (packet.Peek()); - return SendOKResponse (); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": failed to read. Error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), read_addr, error.AsCString ()); + return SendErrorResponse (0x08); } - return SendErrorResponse (12); -} -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_QLaunchArch (StringExtractorGDBRemote &packet) -{ - packet.SetFilePos(::strlen ("QLaunchArch:")); - const uint32_t bytes_left = packet.GetBytesLeft(); - if (bytes_left > 0) + if (bytes_read == 0) { - const char* arch_triple = packet.Peek(); - ArchSpec arch_spec(arch_triple,NULL); - m_process_launch_info.SetArchitecture(arch_spec); - return SendOKResponse(); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": read %" PRIu64 " of %" PRIu64 " requested bytes", __FUNCTION__, m_debugged_process_sp->GetID (), read_addr, bytes_read, byte_count); + return SendErrorResponse (0x08); } - return SendErrorResponse(13); -} -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_QSetDisableASLR (StringExtractorGDBRemote &packet) -{ - packet.SetFilePos(::strlen ("QSetDisableASLR:")); - if (packet.GetU32(0)) - m_process_launch_info.GetFlags().Set (eLaunchFlagDisableASLR); - else - m_process_launch_info.GetFlags().Clear (eLaunchFlagDisableASLR); - return SendOKResponse (); + StreamGDBRemote response; + for (lldb::addr_t i = 0; i < bytes_read; ++i) + response.PutHex8(buf[i]); + + return SendPacketNoLock(response.GetData(), response.GetSize()); } GDBRemoteCommunication::PacketResult @@ -1154,453 +3444,764 @@ GDBRemoteCommunicationServer::Handle_QSetDetachOnError (StringExtractorGDBRemote return SendOKResponse (); } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_QSetWorkingDir (StringExtractorGDBRemote &packet) -{ - packet.SetFilePos(::strlen ("QSetWorkingDir:")); - std::string path; - packet.GetHexByteString(path); - if (m_is_platform) +GDBRemoteCommunicationServer::PacketResult +GDBRemoteCommunicationServer::Handle_M (StringExtractorGDBRemote &packet) +{ + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); + + // Ensure we're llgs. + if (!IsGdbServer()) + { + // Only supported on llgs + return SendUnimplementedResponse (""); + } + + if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); + return SendErrorResponse (0x15); + } + + // Parse out the memory address. + packet.SetFilePos (strlen("M")); + if (packet.GetBytesLeft() < 1) + return SendIllFormedResponse(packet, "Too short M packet"); + + // Read the address. Punting on validation. + // FIXME replace with Hex U64 read with no default value that fails on failed read. + const lldb::addr_t write_addr = packet.GetHexMaxU64(false, 0); + + // Validate comma. + if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ',')) + return SendIllFormedResponse(packet, "Comma sep missing in M packet"); + + // Get # bytes to read. + if (packet.GetBytesLeft() < 1) + return SendIllFormedResponse(packet, "Length missing in M packet"); + + const uint64_t byte_count = packet.GetHexMaxU64(false, 0); + if (byte_count == 0) { -#ifdef _WIN32 - // Not implemented on Windows - return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_QSetWorkingDir unimplemented"); -#else - // If this packet is sent to a platform, then change the current working directory - if (::chdir(path.c_str()) != 0) - return SendErrorResponse(errno); -#endif + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s nothing to write: zero-length packet", __FUNCTION__); + return PacketResult::Success; } - else + + // Validate colon. + if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ':')) + return SendIllFormedResponse(packet, "Comma sep missing in M packet after byte length"); + + // Allocate the conversion buffer. + std::vector buf(byte_count, 0); + if (buf.empty()) + return SendErrorResponse (0x78); + + // Convert the hex memory write contents to bytes. + StreamGDBRemote response; + const uint64_t convert_count = static_cast (packet.GetHexBytes (&buf[0], byte_count, 0)); + if (convert_count != byte_count) { - m_process_launch_info.SwapWorkingDirectory (path); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": asked to write %" PRIu64 " bytes, but only found %" PRIu64 " to convert.", __FUNCTION__, m_debugged_process_sp->GetID (), write_addr, byte_count, convert_count); + return SendIllFormedResponse (packet, "M content byte length specified did not match hex-encoded content length"); + } + + // Write the process memory. + lldb::addr_t bytes_written = 0; + lldb_private::Error error = m_debugged_process_sp->WriteMemory (write_addr, &buf[0], byte_count, bytes_written); + if (error.Fail ()) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": failed to write. Error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), write_addr, error.AsCString ()); + return SendErrorResponse (0x09); + } + + if (bytes_written == 0) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": wrote %" PRIu64 " of %" PRIu64 " requested bytes", __FUNCTION__, m_debugged_process_sp->GetID (), write_addr, bytes_written, byte_count); + return SendErrorResponse (0x09); } + return SendOKResponse (); } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_qGetWorkingDir (StringExtractorGDBRemote &packet) +GDBRemoteCommunicationServer::PacketResult +GDBRemoteCommunicationServer::Handle_qMemoryRegionInfoSupported (StringExtractorGDBRemote &packet) { - StreamString response; + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); - if (m_is_platform) + // We don't support if we're not llgs. + if (!IsGdbServer()) + return SendUnimplementedResponse (""); + + // Currently only the NativeProcessProtocol knows if it can handle a qMemoryRegionInfoSupported + // request, but we're not guaranteed to be attached to a process. For now we'll assume the + // client only asks this when a process is being debugged. + + // Ensure we have a process running; otherwise, we can't figure this out + // since we won't have a NativeProcessProtocol. + if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) { - // If this packet is sent to a platform, then change the current working directory - char cwd[PATH_MAX]; - if (getcwd(cwd, sizeof(cwd)) == NULL) - { - return SendErrorResponse(errno); - } - else - { - response.PutBytesAsRawHex8(cwd, strlen(cwd)); - return SendPacketNoLock(response.GetData(), response.GetSize()); - } + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); + return SendErrorResponse (0x15); } - else + + // Test if we can get any region back when asking for the region around NULL. + MemoryRegionInfo region_info; + const Error error = m_debugged_process_sp->GetMemoryRegionInfo (0, region_info); + if (error.Fail ()) { - const char *working_dir = m_process_launch_info.GetWorkingDirectory(); - if (working_dir && working_dir[0]) - { - response.PutBytesAsRawHex8(working_dir, strlen(working_dir)); - return SendPacketNoLock(response.GetData(), response.GetSize()); - } - else - { - return SendErrorResponse(14); - } + // We don't support memory region info collection for this NativeProcessProtocol. + return SendUnimplementedResponse (""); } + + return SendOKResponse(); } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_QSetSTDIN (StringExtractorGDBRemote &packet) +GDBRemoteCommunicationServer::PacketResult +GDBRemoteCommunicationServer::Handle_qMemoryRegionInfo (StringExtractorGDBRemote &packet) { - packet.SetFilePos(::strlen ("QSetSTDIN:")); - ProcessLaunchInfo::FileAction file_action; - std::string path; - packet.GetHexByteString(path); - const bool read = false; - const bool write = true; - if (file_action.Open(STDIN_FILENO, path.c_str(), read, write)) + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); + + // We don't support if we're not llgs. + if (!IsGdbServer()) + return SendUnimplementedResponse (""); + + // Ensure we have a process. + if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) { - m_process_launch_info.AppendFileAction(file_action); - return SendOKResponse (); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); + return SendErrorResponse (0x15); } - return SendErrorResponse (15); -} -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_QSetSTDOUT (StringExtractorGDBRemote &packet) -{ - packet.SetFilePos(::strlen ("QSetSTDOUT:")); - ProcessLaunchInfo::FileAction file_action; - std::string path; - packet.GetHexByteString(path); - const bool read = true; - const bool write = false; - if (file_action.Open(STDOUT_FILENO, path.c_str(), read, write)) + // Parse out the memory address. + packet.SetFilePos (strlen("qMemoryRegionInfo:")); + if (packet.GetBytesLeft() < 1) + return SendIllFormedResponse(packet, "Too short qMemoryRegionInfo: packet"); + + // Read the address. Punting on validation. + const lldb::addr_t read_addr = packet.GetHexMaxU64(false, 0); + + StreamGDBRemote response; + + // Get the memory region info for the target address. + MemoryRegionInfo region_info; + const Error error = m_debugged_process_sp->GetMemoryRegionInfo (read_addr, region_info); + if (error.Fail ()) { - m_process_launch_info.AppendFileAction(file_action); - return SendOKResponse (); - } - return SendErrorResponse (16); -} + // Return the error message. -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_QSetSTDERR (StringExtractorGDBRemote &packet) -{ - packet.SetFilePos(::strlen ("QSetSTDERR:")); - ProcessLaunchInfo::FileAction file_action; - std::string path; - packet.GetHexByteString(path); - const bool read = true; - const bool write = false; - if (file_action.Open(STDERR_FILENO, path.c_str(), read, write)) + response.PutCString ("error:"); + response.PutCStringAsRawHex8 (error.AsCString ()); + response.PutChar (';'); + } + else { - m_process_launch_info.AppendFileAction(file_action); - return SendOKResponse (); + // Range start and size. + response.Printf ("start:%" PRIx64 ";size:%" PRIx64 ";", region_info.GetRange ().GetRangeBase (), region_info.GetRange ().GetByteSize ()); + + // Permissions. + if (region_info.GetReadable () || + region_info.GetWritable () || + region_info.GetExecutable ()) + { + // Write permissions info. + response.PutCString ("permissions:"); + + if (region_info.GetReadable ()) + response.PutChar ('r'); + if (region_info.GetWritable ()) + response.PutChar('w'); + if (region_info.GetExecutable()) + response.PutChar ('x'); + + response.PutChar (';'); + } } - return SendErrorResponse (17); -} -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_QStartNoAckMode (StringExtractorGDBRemote &packet) -{ - // Send response first before changing m_send_acks to we ack this packet - PacketResult packet_result = SendOKResponse (); - m_send_acks = false; - return packet_result; + return SendPacketNoLock(response.GetData(), response.GetSize()); } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_qPlatform_mkdir (StringExtractorGDBRemote &packet) +GDBRemoteCommunicationServer::PacketResult +GDBRemoteCommunicationServer::Handle_Z (StringExtractorGDBRemote &packet) { - packet.SetFilePos(::strlen("qPlatform_mkdir:")); - mode_t mode = packet.GetHexMaxU32(false, UINT32_MAX); - if (packet.GetChar() == ',') + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_BREAKPOINTS)); + + // We don't support if we're not llgs. + if (!IsGdbServer()) + return SendUnimplementedResponse (""); + + // Ensure we have a process. + if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) { - std::string path; - packet.GetHexByteString(path); - Error error = Host::MakeDirectory(path.c_str(),mode); - if (error.Success()) - return SendPacketNoLock ("OK", 2); - else - return SendErrorResponse(error.GetError()); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); + return SendErrorResponse (0x15); } - return SendErrorResponse(20); -} -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_qPlatform_chmod (StringExtractorGDBRemote &packet) -{ - packet.SetFilePos(::strlen("qPlatform_chmod:")); - - mode_t mode = packet.GetHexMaxU32(false, UINT32_MAX); - if (packet.GetChar() == ',') + // Parse out software or hardware breakpoint requested. + packet.SetFilePos (strlen("Z")); + if (packet.GetBytesLeft() < 1) + return SendIllFormedResponse(packet, "Too short Z packet, missing software/hardware specifier"); + + bool want_breakpoint = true; + bool want_hardware = false; + + const char breakpoint_type_char = packet.GetChar (); + switch (breakpoint_type_char) { - std::string path; - packet.GetHexByteString(path); - Error error = Host::SetFilePermissions (path.c_str(), mode); - if (error.Success()) - return SendPacketNoLock ("OK", 2); - else - return SendErrorResponse(error.GetError()); + case '0': want_hardware = false; want_breakpoint = true; break; + case '1': want_hardware = true; want_breakpoint = true; break; + case '2': want_breakpoint = false; break; + case '3': want_breakpoint = false; break; + default: + return SendIllFormedResponse(packet, "Z packet had invalid software/hardware specifier"); + } - return SendErrorResponse(19); -} -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_vFile_Open (StringExtractorGDBRemote &packet) -{ - packet.SetFilePos(::strlen("vFile:open:")); - std::string path; - packet.GetHexByteStringTerminatedBy(path,','); - if (!path.empty()) + if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',') + return SendIllFormedResponse(packet, "Malformed Z packet, expecting comma after breakpoint type"); + + // FIXME implement watchpoint support. + if (!want_breakpoint) + return SendUnimplementedResponse ("watchpoint support not yet implemented"); + + // Parse out the breakpoint address. + if (packet.GetBytesLeft() < 1) + return SendIllFormedResponse(packet, "Too short Z packet, missing address"); + const lldb::addr_t breakpoint_addr = packet.GetHexMaxU64(false, 0); + + if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',') + return SendIllFormedResponse(packet, "Malformed Z packet, expecting comma after address"); + + // Parse out the breakpoint kind (i.e. size hint for opcode size). + const uint32_t kind = packet.GetHexMaxU32 (false, std::numeric_limits::max ()); + if (kind == std::numeric_limits::max ()) + return SendIllFormedResponse(packet, "Malformed Z packet, failed to parse kind argument"); + + if (want_breakpoint) { - if (packet.GetChar() == ',') + // Try to set the breakpoint. + const Error error = m_debugged_process_sp->SetBreakpoint (breakpoint_addr, kind, want_hardware); + if (error.Success ()) + return SendOKResponse (); + else { - uint32_t flags = packet.GetHexMaxU32(false, 0); - if (packet.GetChar() == ',') - { - mode_t mode = packet.GetHexMaxU32(false, 0600); - Error error; - int fd = ::open (path.c_str(), flags, mode); - const int save_errno = fd == -1 ? errno : 0; - StreamString response; - response.PutChar('F'); - response.Printf("%i", fd); - if (save_errno) - response.Printf(",%i", save_errno); - return SendPacketNoLock(response.GetData(), response.GetSize()); - } + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to set breakpoint: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ()); + return SendErrorResponse (0x09); } } - return SendErrorResponse(18); + + // FIXME fix up after watchpoints are handled. + return SendUnimplementedResponse (""); } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_vFile_Close (StringExtractorGDBRemote &packet) +GDBRemoteCommunicationServer::PacketResult +GDBRemoteCommunicationServer::Handle_z (StringExtractorGDBRemote &packet) { - packet.SetFilePos(::strlen("vFile:close:")); - int fd = packet.GetS32(-1); - Error error; - int err = -1; - int save_errno = 0; - if (fd >= 0) + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_BREAKPOINTS)); + + // We don't support if we're not llgs. + if (!IsGdbServer()) + return SendUnimplementedResponse (""); + + // Ensure we have a process. + if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) { - err = close(fd); - save_errno = err == -1 ? errno : 0; + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); + return SendErrorResponse (0x15); } - else + + // Parse out software or hardware breakpoint requested. + packet.SetFilePos (strlen("Z")); + if (packet.GetBytesLeft() < 1) + return SendIllFormedResponse(packet, "Too short z packet, missing software/hardware specifier"); + + bool want_breakpoint = true; + + const char breakpoint_type_char = packet.GetChar (); + switch (breakpoint_type_char) { - save_errno = EINVAL; + case '0': want_breakpoint = true; break; + case '1': want_breakpoint = true; break; + case '2': want_breakpoint = false; break; + case '3': want_breakpoint = false; break; + default: + return SendIllFormedResponse(packet, "z packet had invalid software/hardware specifier"); + } - StreamString response; - response.PutChar('F'); - response.Printf("%i", err); - if (save_errno) - response.Printf(",%i", save_errno); - return SendPacketNoLock(response.GetData(), response.GetSize()); -} -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_vFile_pRead (StringExtractorGDBRemote &packet) -{ -#ifdef _WIN32 - // Not implemented on Windows - return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_pRead() unimplemented"); -#else - StreamGDBRemote response; - packet.SetFilePos(::strlen("vFile:pread:")); - int fd = packet.GetS32(-1); - if (packet.GetChar() == ',') + if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',') + return SendIllFormedResponse(packet, "Malformed z packet, expecting comma after breakpoint type"); + + // FIXME implement watchpoint support. + if (!want_breakpoint) + return SendUnimplementedResponse ("watchpoint support not yet implemented"); + + // Parse out the breakpoint address. + if (packet.GetBytesLeft() < 1) + return SendIllFormedResponse(packet, "Too short z packet, missing address"); + const lldb::addr_t breakpoint_addr = packet.GetHexMaxU64(false, 0); + + if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',') + return SendIllFormedResponse(packet, "Malformed z packet, expecting comma after address"); + + // Parse out the breakpoint kind (i.e. size hint for opcode size). + const uint32_t kind = packet.GetHexMaxU32 (false, std::numeric_limits::max ()); + if (kind == std::numeric_limits::max ()) + return SendIllFormedResponse(packet, "Malformed z packet, failed to parse kind argument"); + + if (want_breakpoint) { - uint64_t count = packet.GetU64(UINT64_MAX); - if (packet.GetChar() == ',') + // Try to set the breakpoint. + const Error error = m_debugged_process_sp->RemoveBreakpoint (breakpoint_addr); + if (error.Success ()) + return SendOKResponse (); + else { - uint64_t offset = packet.GetU64(UINT32_MAX); - if (count == UINT64_MAX) - { - response.Printf("F-1:%i", EINVAL); - return SendPacketNoLock(response.GetData(), response.GetSize()); - } - - std::string buffer(count, 0); - const ssize_t bytes_read = ::pread (fd, &buffer[0], buffer.size(), offset); - const int save_errno = bytes_read == -1 ? errno : 0; - response.PutChar('F'); - response.Printf("%zi", bytes_read); - if (save_errno) - response.Printf(",%i", save_errno); - else - { - response.PutChar(';'); - response.PutEscapedBytes(&buffer[0], bytes_read); - } - return SendPacketNoLock(response.GetData(), response.GetSize()); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to remove breakpoint: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ()); + return SendErrorResponse (0x09); } } - return SendErrorResponse(21); -#endif + // FIXME fix up after watchpoints are handled. + return SendUnimplementedResponse (""); } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_vFile_pWrite (StringExtractorGDBRemote &packet) +GDBRemoteCommunicationServer::PacketResult +GDBRemoteCommunicationServer::Handle_s (StringExtractorGDBRemote &packet) { -#ifdef _WIN32 - return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_pWrite() unimplemented"); -#else - packet.SetFilePos(::strlen("vFile:pwrite:")); + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD)); - StreamGDBRemote response; - response.PutChar('F'); + // We don't support if we're not llgs. + if (!IsGdbServer()) + return SendUnimplementedResponse (""); - int fd = packet.GetU32(UINT32_MAX); - if (packet.GetChar() == ',') + // Ensure we have a process. + if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) { - off_t offset = packet.GetU64(UINT32_MAX); - if (packet.GetChar() == ',') - { - std::string buffer; - if (packet.GetEscapedBinaryData(buffer)) - { - const ssize_t bytes_written = ::pwrite (fd, buffer.data(), buffer.size(), offset); - const int save_errno = bytes_written == -1 ? errno : 0; - response.Printf("%zi", bytes_written); - if (save_errno) - response.Printf(",%i", save_errno); - } - else - { - response.Printf ("-1,%i", EINVAL); - } - return SendPacketNoLock(response.GetData(), response.GetSize()); - } + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); + return SendErrorResponse (0x32); } - return SendErrorResponse(27); + + // We first try to use a continue thread id. If any one or any all set, use the current thread. + // Bail out if we don't have a thread id. + lldb::tid_t tid = GetContinueThreadID (); + if (tid == 0 || tid == LLDB_INVALID_THREAD_ID) + tid = GetCurrentThreadID (); + if (tid == LLDB_INVALID_THREAD_ID) + return SendErrorResponse (0x33); + + // Double check that we have such a thread. + // TODO investigate: on MacOSX we might need to do an UpdateThreads () here. + NativeThreadProtocolSP thread_sp = m_debugged_process_sp->GetThreadByID (tid); + if (!thread_sp || thread_sp->GetID () != tid) + return SendErrorResponse (0x33); + + // Create the step action for the given thread. + lldb_private::ResumeAction action = { tid, eStateStepping, 0 }; + + // Setup the actions list. + lldb_private::ResumeActionList actions; + actions.Append (action); + + // All other threads stop while we're single stepping a thread. + actions.SetDefaultThreadActionIfNeeded(eStateStopped, 0); + Error error = m_debugged_process_sp->Resume (actions); + if (error.Fail ()) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " Resume() failed with error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), tid, error.AsCString ()); + return SendErrorResponse(0x49); + } + + // No response here - the stop or exit will come from the resulting action. + return PacketResult::Success; +} + +GDBRemoteCommunicationServer::PacketResult +GDBRemoteCommunicationServer::Handle_qSupported (StringExtractorGDBRemote &packet) +{ + StreamGDBRemote response; + + // Features common to lldb-platform and llgs. + uint32_t max_packet_size = 128 * 1024; // 128KBytes is a reasonable max packet size--debugger can always use less + response.Printf ("PacketSize=%x", max_packet_size); + + response.PutCString (";QStartNoAckMode+"); + response.PutCString (";QThreadSuffixSupported+"); + response.PutCString (";QListThreadsInStopReply+"); +#if defined(__linux__) + response.PutCString (";qXfer:auxv:read+"); #endif + + return SendPacketNoLock(response.GetData(), response.GetSize()); } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_vFile_Size (StringExtractorGDBRemote &packet) +GDBRemoteCommunicationServer::PacketResult +GDBRemoteCommunicationServer::Handle_QThreadSuffixSupported (StringExtractorGDBRemote &packet) { - packet.SetFilePos(::strlen("vFile:size:")); - std::string path; - packet.GetHexByteString(path); - if (!path.empty()) + m_thread_suffix_supported = true; + return SendOKResponse(); +} + +GDBRemoteCommunicationServer::PacketResult +GDBRemoteCommunicationServer::Handle_QListThreadsInStopReply (StringExtractorGDBRemote &packet) +{ + m_list_threads_in_stop_reply = true; + return SendOKResponse(); +} + +GDBRemoteCommunicationServer::PacketResult +GDBRemoteCommunicationServer::Handle_qXfer_auxv_read (StringExtractorGDBRemote &packet) +{ + // We don't support if we're not llgs. + if (!IsGdbServer()) + return SendUnimplementedResponse ("only supported for lldb-gdbserver"); + + // *BSD impls should be able to do this too. +#if defined(__linux__) + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); + + // Parse out the offset. + packet.SetFilePos (strlen("qXfer:auxv:read::")); + if (packet.GetBytesLeft () < 1) + return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing offset"); + + const uint64_t auxv_offset = packet.GetHexMaxU64 (false, std::numeric_limits::max ()); + if (auxv_offset == std::numeric_limits::max ()) + return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing offset"); + + // Parse out comma. + if (packet.GetBytesLeft () < 1 || packet.GetChar () != ',') + return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing comma after offset"); + + // Parse out the length. + const uint64_t auxv_length = packet.GetHexMaxU64 (false, std::numeric_limits::max ()); + if (auxv_length == std::numeric_limits::max ()) + return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing length"); + + // Grab the auxv data if we need it. + if (!m_active_auxv_buffer_sp) { - lldb::user_id_t retcode = Host::GetFileSize(FileSpec(path.c_str(), false)); - StreamString response; - response.PutChar('F'); - response.PutHex64(retcode); - if (retcode == UINT64_MAX) + // Make sure we have a valid process. + if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) { - response.PutChar(','); - response.PutHex64(retcode); // TODO: replace with Host::GetSyswideErrorCode() + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); + return SendErrorResponse (0x10); + } + + // Grab the auxv data. + m_active_auxv_buffer_sp = Host::GetAuxvData (m_debugged_process_sp->GetID ()); + if (!m_active_auxv_buffer_sp || m_active_auxv_buffer_sp->GetByteSize () == 0) + { + // Hmm, no auxv data, call that an error. + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s failed, no auxv data retrieved", __FUNCTION__); + m_active_auxv_buffer_sp.reset (); + return SendErrorResponse (0x11); } - return SendPacketNoLock(response.GetData(), response.GetSize()); } - return SendErrorResponse(22); -} -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_vFile_Mode (StringExtractorGDBRemote &packet) -{ - packet.SetFilePos(::strlen("vFile:mode:")); - std::string path; - packet.GetHexByteString(path); - if (!path.empty()) + // FIXME find out if/how I lock the stream here. + + StreamGDBRemote response; + bool done_with_buffer = false; + + if (auxv_offset >= m_active_auxv_buffer_sp->GetByteSize ()) { - Error error; - const uint32_t mode = File::GetPermissions(path.c_str(), error); - StreamString response; - response.Printf("F%u", mode); - if (mode == 0 || error.Fail()) - response.Printf(",%i", (int)error.GetError()); - return SendPacketNoLock(response.GetData(), response.GetSize()); + // We have nothing left to send. Mark the buffer as complete. + response.PutChar ('l'); + done_with_buffer = true; } - return SendErrorResponse(23); + else + { + // Figure out how many bytes are available starting at the given offset. + const uint64_t bytes_remaining = m_active_auxv_buffer_sp->GetByteSize () - auxv_offset; + + // Figure out how many bytes we're going to read. + const uint64_t bytes_to_read = (auxv_length > bytes_remaining) ? bytes_remaining : auxv_length; + + // Mark the response type according to whether we're reading the remainder of the auxv data. + if (bytes_to_read >= bytes_remaining) + { + // There will be nothing left to read after this + response.PutChar ('l'); + done_with_buffer = true; + } + else + { + // There will still be bytes to read after this request. + response.PutChar ('m'); + } + + // Now write the data in encoded binary form. + response.PutEscapedBytes (m_active_auxv_buffer_sp->GetBytes () + auxv_offset, bytes_to_read); + } + + if (done_with_buffer) + m_active_auxv_buffer_sp.reset (); + + return SendPacketNoLock(response.GetData(), response.GetSize()); +#else + return SendUnimplementedResponse ("not implemented on this platform"); +#endif } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_vFile_Exists (StringExtractorGDBRemote &packet) +GDBRemoteCommunicationServer::PacketResult +GDBRemoteCommunicationServer::Handle_QSaveRegisterState (StringExtractorGDBRemote &packet) { - packet.SetFilePos(::strlen("vFile:exists:")); - std::string path; - packet.GetHexByteString(path); - if (!path.empty()) + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); + + // We don't support if we're not llgs. + if (!IsGdbServer()) + return SendUnimplementedResponse ("only supported for lldb-gdbserver"); + + // Move past packet name. + packet.SetFilePos (strlen ("QSaveRegisterState")); + + // Get the thread to use. + NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet); + if (!thread_sp) { - bool retcode = Host::GetFileExists(FileSpec(path.c_str(), false)); - StreamString response; - response.PutChar('F'); - response.PutChar(','); - if (retcode) - response.PutChar('1'); + if (m_thread_suffix_supported) + return SendIllFormedResponse (packet, "No thread specified in QSaveRegisterState packet"); else - response.PutChar('0'); - return SendPacketNoLock(response.GetData(), response.GetSize()); + return SendIllFormedResponse (packet, "No thread was is set with the Hg packet"); } - return SendErrorResponse(24); + + // Grab the register context for the thread. + NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); + if (!reg_context_sp) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ()); + return SendErrorResponse (0x15); + } + + // Save registers to a buffer. + DataBufferSP register_data_sp; + Error error = reg_context_sp->ReadAllRegisterValues (register_data_sp); + if (error.Fail ()) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to save all register values: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ()); + return SendErrorResponse (0x75); + } + + // Allocate a new save id. + const uint32_t save_id = GetNextSavedRegistersID (); + assert ((m_saved_registers_map.find (save_id) == m_saved_registers_map.end ()) && "GetNextRegisterSaveID() returned an existing register save id"); + + // Save the register data buffer under the save id. + { + Mutex::Locker locker (m_saved_registers_mutex); + m_saved_registers_map[save_id] = register_data_sp; + } + + // Write the response. + StreamGDBRemote response; + response.Printf ("%" PRIu32, save_id); + return SendPacketNoLock(response.GetData(), response.GetSize()); } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_vFile_symlink (StringExtractorGDBRemote &packet) +GDBRemoteCommunicationServer::PacketResult +GDBRemoteCommunicationServer::Handle_QRestoreRegisterState (StringExtractorGDBRemote &packet) { - packet.SetFilePos(::strlen("vFile:symlink:")); - std::string dst, src; - packet.GetHexByteStringTerminatedBy(dst, ','); - packet.GetChar(); // Skip ',' char - packet.GetHexByteString(src); - Error error = Host::Symlink(src.c_str(), dst.c_str()); - StreamString response; - response.Printf("F%u,%u", error.GetError(), error.GetError()); - return SendPacketNoLock(response.GetData(), response.GetSize()); + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); + + // We don't support if we're not llgs. + if (!IsGdbServer()) + return SendUnimplementedResponse ("only supported for lldb-gdbserver"); + + // Parse out save id. + packet.SetFilePos (strlen ("QRestoreRegisterState:")); + if (packet.GetBytesLeft () < 1) + return SendIllFormedResponse (packet, "QRestoreRegisterState packet missing register save id"); + + const uint32_t save_id = packet.GetU32 (0); + if (save_id == 0) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s QRestoreRegisterState packet has malformed save id, expecting decimal uint32_t", __FUNCTION__); + return SendErrorResponse (0x76); + } + + // Get the thread to use. + NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet); + if (!thread_sp) + { + if (m_thread_suffix_supported) + return SendIllFormedResponse (packet, "No thread specified in QRestoreRegisterState packet"); + else + return SendIllFormedResponse (packet, "No thread was is set with the Hg packet"); + } + + // Grab the register context for the thread. + NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); + if (!reg_context_sp) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ()); + return SendErrorResponse (0x15); + } + + // Retrieve register state buffer, then remove from the list. + DataBufferSP register_data_sp; + { + Mutex::Locker locker (m_saved_registers_mutex); + + // Find the register set buffer for the given save id. + auto it = m_saved_registers_map.find (save_id); + if (it == m_saved_registers_map.end ()) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " does not have a register set save buffer for id %" PRIu32, __FUNCTION__, m_debugged_process_sp->GetID (), save_id); + return SendErrorResponse (0x77); + } + register_data_sp = it->second; + + // Remove it from the map. + m_saved_registers_map.erase (it); + } + + Error error = reg_context_sp->WriteAllRegisterValues (register_data_sp); + if (error.Fail ()) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to restore all register values: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ()); + return SendErrorResponse (0x77); + } + + return SendOKResponse(); } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_vFile_unlink (StringExtractorGDBRemote &packet) +void +GDBRemoteCommunicationServer::FlushInferiorOutput () { - packet.SetFilePos(::strlen("vFile:unlink:")); - std::string path; - packet.GetHexByteString(path); - Error error = Host::Unlink(path.c_str()); - StreamString response; - response.Printf("F%u,%u", error.GetError(), error.GetError()); - return SendPacketNoLock(response.GetData(), response.GetSize()); + // If we're not monitoring an inferior's terminal, ignore this. + if (!m_stdio_communication.IsConnected()) + return; + + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD)); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s() called", __FUNCTION__); + + // FIXME implement a timeout on the join. + m_stdio_communication.JoinReadThread(); } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_qPlatform_shell (StringExtractorGDBRemote &packet) +void +GDBRemoteCommunicationServer::MaybeCloseInferiorTerminalConnection () { - packet.SetFilePos(::strlen("qPlatform_shell:")); - std::string path; - std::string working_dir; - packet.GetHexByteStringTerminatedBy(path,','); - if (!path.empty()) + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); + + // Tell the stdio connection to shut down. + if (m_stdio_communication.IsConnected()) { - if (packet.GetChar() == ',') + auto connection = m_stdio_communication.GetConnection(); + if (connection) { - // FIXME: add timeout to qPlatform_shell packet - // uint32_t timeout = packet.GetHexMaxU32(false, 32); - uint32_t timeout = 10; - if (packet.GetChar() == ',') - packet.GetHexByteString(working_dir); - int status, signo; - std::string output; - Error err = Host::RunShellCommand(path.c_str(), - working_dir.empty() ? NULL : working_dir.c_str(), - &status, &signo, &output, timeout); - StreamGDBRemote response; - if (err.Fail()) + Error error; + connection->Disconnect (&error); + + if (error.Success ()) { - response.PutCString("F,"); - response.PutHex32(UINT32_MAX); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s disconnect process terminal stdio - SUCCESS", __FUNCTION__); } else { - response.PutCString("F,"); - response.PutHex32(status); - response.PutChar(','); - response.PutHex32(signo); - response.PutChar(','); - response.PutEscapedBytes(output.c_str(), output.size()); + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s disconnect process terminal stdio - FAIL: %s", __FUNCTION__, error.AsCString ()); } - return SendPacketNoLock(response.GetData(), response.GetSize()); } } - return SendErrorResponse(24); } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_vFile_Stat (StringExtractorGDBRemote &packet) -{ - return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_Stat() unimplemented"); -} -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServer::Handle_vFile_MD5 (StringExtractorGDBRemote &packet) +lldb_private::NativeThreadProtocolSP +GDBRemoteCommunicationServer::GetThreadFromSuffix (StringExtractorGDBRemote &packet) { - packet.SetFilePos(::strlen("vFile:MD5:")); - std::string path; - packet.GetHexByteString(path); - if (!path.empty()) + NativeThreadProtocolSP thread_sp; + + // We have no thread if we don't have a process. + if (!m_debugged_process_sp || m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID) + return thread_sp; + + // If the client hasn't asked for thread suffix support, there will not be a thread suffix. + // Use the current thread in that case. + if (!m_thread_suffix_supported) { - uint64_t a,b; - StreamGDBRemote response; - if (Host::CalculateMD5(FileSpec(path.c_str(),false),a,b) == false) + const lldb::tid_t current_tid = GetCurrentThreadID (); + if (current_tid == LLDB_INVALID_THREAD_ID) + return thread_sp; + else if (current_tid == 0) { - response.PutCString("F,"); - response.PutCString("x"); + // Pick a thread. + return m_debugged_process_sp->GetThreadAtIndex (0); } else - { - response.PutCString("F,"); - response.PutHex64(a); - response.PutHex64(b); - } - return SendPacketNoLock(response.GetData(), response.GetSize()); + return m_debugged_process_sp->GetThreadByID (current_tid); } - return SendErrorResponse(25); + + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); + + // Parse out the ';'. + if (packet.GetBytesLeft () < 1 || packet.GetChar () != ';') + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s gdb-remote parse error: expected ';' prior to start of thread suffix: packet contents = '%s'", __FUNCTION__, packet.GetStringRef ().c_str ()); + return thread_sp; + } + + if (!packet.GetBytesLeft ()) + return thread_sp; + + // Parse out thread: portion. + if (strncmp (packet.Peek (), "thread:", strlen("thread:")) != 0) + { + if (log) + log->Printf ("GDBRemoteCommunicationServer::%s gdb-remote parse error: expected 'thread:' but not found, packet contents = '%s'", __FUNCTION__, packet.GetStringRef ().c_str ()); + return thread_sp; + } + packet.SetFilePos (packet.GetFilePos () + strlen("thread:")); + const lldb::tid_t tid = packet.GetHexMaxU64(false, 0); + if (tid != 0) + return m_debugged_process_sp->GetThreadByID (tid); + + return thread_sp; +} + +lldb::tid_t +GDBRemoteCommunicationServer::GetCurrentThreadID () const +{ + if (m_current_tid == 0 || m_current_tid == LLDB_INVALID_THREAD_ID) + { + // Use whatever the debug process says is the current thread id + // since the protocol either didn't specify or specified we want + // any/all threads marked as the current thread. + if (!m_debugged_process_sp) + return LLDB_INVALID_THREAD_ID; + return m_debugged_process_sp->GetCurrentThreadID (); + } + // Use the specific current thread id set by the gdb remote protocol. + return m_current_tid; +} + +uint32_t +GDBRemoteCommunicationServer::GetNextSavedRegistersID () +{ + Mutex::Locker locker (m_saved_registers_mutex); + return m_next_saved_registers_id++; } diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.h b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.h index 4bc0857..d20cc2a 100644 --- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.h +++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.h @@ -14,16 +14,23 @@ // C++ Includes #include #include +#include // Other libraries and framework includes // Project includes +#include "lldb/lldb-private-forward.h" +#include "lldb/Core/Communication.h" #include "lldb/Host/Mutex.h" #include "lldb/Target/Process.h" #include "GDBRemoteCommunication.h" +#include "../../../Host/common/NativeProcessProtocol.h" + class ProcessGDBRemote; class StringExtractorGDBRemote; -class GDBRemoteCommunicationServer : public GDBRemoteCommunication +class GDBRemoteCommunicationServer : + public GDBRemoteCommunication, + public lldb_private::NativeProcessProtocol::NativeDelegate { public: typedef std::map PortMap; @@ -38,12 +45,13 @@ public: GDBRemoteCommunicationServer(bool is_platform); GDBRemoteCommunicationServer(bool is_platform, - const lldb::PlatformSP& platform_sp); + const lldb::PlatformSP& platform_sp, + lldb::DebuggerSP& debugger_sp); virtual ~GDBRemoteCommunicationServer(); - bool + PacketResult GetPacketAndSendResponse (uint32_t timeout_usec, lldb_private::Error &error, bool &interrupt, @@ -188,6 +196,28 @@ public: lldb_private::Error LaunchProcess (); + //------------------------------------------------------------------ + /// Attach to a process. + /// + /// This method supports attaching llgs to a process accessible via the + /// configured Platform. + /// + /// @return + /// An Error object indicating the success or failure of the + /// attach operation. + //------------------------------------------------------------------ + lldb_private::Error + AttachToProcess (lldb::pid_t pid); + + //------------------------------------------------------------------ + // NativeProcessProtocol::NativeDelegate overrides + //------------------------------------------------------------------ + void + InitializeDelegate (lldb_private::NativeProcessProtocol *process) override; + + void + ProcessStateChanged (lldb_private::NativeProcessProtocol *process, lldb::StateType state) override; + protected: lldb::PlatformSP m_platform_sp; lldb::thread_t m_async_thread; @@ -199,7 +229,20 @@ protected: uint32_t m_proc_infos_index; PortMap m_port_map; uint16_t m_port_offset; - + lldb::tid_t m_current_tid; + lldb::tid_t m_continue_tid; + lldb_private::Mutex m_debugged_process_mutex; + lldb_private::NativeProcessProtocolSP m_debugged_process_sp; + lldb::DebuggerSP m_debugger_sp; + Communication m_stdio_communication; + bool m_exit_now; // use in asynchronous handling to indicate process should exit. + lldb::StateType m_inferior_prev_state; + bool m_thread_suffix_supported; + bool m_list_threads_in_stop_reply; + lldb::DataBufferSP m_active_auxv_buffer_sp; + lldb_private::Mutex m_saved_registers_mutex; + std::unordered_map m_saved_registers_map; + uint32_t m_next_saved_registers_id; PacketResult SendUnimplementedResponse (const char *packet); @@ -208,9 +251,24 @@ protected: SendErrorResponse (uint8_t error); PacketResult + SendIllFormedResponse (const StringExtractorGDBRemote &packet, const char *error_message); + + PacketResult SendOKResponse (); PacketResult + SendONotification (const char *buffer, uint32_t len); + + PacketResult + SendWResponse (lldb_private::NativeProcessProtocol *process); + + PacketResult + SendStopReplyPacketForThread (lldb::tid_t tid); + + PacketResult + SendStopReasonForState (lldb::StateType process_state, bool flush_on_exit); + + PacketResult Handle_A (StringExtractorGDBRemote &packet); PacketResult @@ -233,7 +291,10 @@ protected: PacketResult Handle_qPlatform_chmod (StringExtractorGDBRemote &packet); - + + PacketResult + Handle_qProcessInfo (StringExtractorGDBRemote &packet); + PacketResult Handle_qProcessInfoPID (StringExtractorGDBRemote &packet); @@ -284,7 +345,22 @@ protected: PacketResult Handle_QSetSTDERR (StringExtractorGDBRemote &packet); - + + PacketResult + Handle_C (StringExtractorGDBRemote &packet); + + PacketResult + Handle_c (StringExtractorGDBRemote &packet, bool skip_file_pos_adjustment = false); + + PacketResult + Handle_vCont (StringExtractorGDBRemote &packet); + + PacketResult + Handle_vCont_actions (StringExtractorGDBRemote &packet); + + PacketResult + Handle_stop_reason (StringExtractorGDBRemote &packet); + PacketResult Handle_vFile_Open (StringExtractorGDBRemote &packet); @@ -321,6 +397,84 @@ protected: PacketResult Handle_qPlatform_shell (StringExtractorGDBRemote &packet); + PacketResult + Handle_qRegisterInfo (StringExtractorGDBRemote &packet); + + PacketResult + Handle_qfThreadInfo (StringExtractorGDBRemote &packet); + + PacketResult + Handle_qsThreadInfo (StringExtractorGDBRemote &packet); + + PacketResult + Handle_p (StringExtractorGDBRemote &packet); + + PacketResult + Handle_P (StringExtractorGDBRemote &packet); + + PacketResult + Handle_H (StringExtractorGDBRemote &packet); + + PacketResult + Handle_interrupt (StringExtractorGDBRemote &packet); + + PacketResult + Handle_m (StringExtractorGDBRemote &packet); + + PacketResult + Handle_M (StringExtractorGDBRemote &packet); + + PacketResult + Handle_qMemoryRegionInfoSupported (StringExtractorGDBRemote &packet); + + PacketResult + Handle_qMemoryRegionInfo (StringExtractorGDBRemote &packet); + + PacketResult + Handle_Z (StringExtractorGDBRemote &packet); + + PacketResult + Handle_z (StringExtractorGDBRemote &packet); + + PacketResult + Handle_s (StringExtractorGDBRemote &packet); + + PacketResult + Handle_qSupported (StringExtractorGDBRemote &packet); + + PacketResult + Handle_QThreadSuffixSupported (StringExtractorGDBRemote &packet); + + PacketResult + Handle_QListThreadsInStopReply (StringExtractorGDBRemote &packet); + + PacketResult + Handle_qXfer_auxv_read (StringExtractorGDBRemote &packet); + + PacketResult + Handle_QSaveRegisterState (StringExtractorGDBRemote &packet); + + PacketResult + Handle_QRestoreRegisterState (StringExtractorGDBRemote &packet); + + void + SetCurrentThreadID (lldb::tid_t tid); + + lldb::tid_t + GetCurrentThreadID () const; + + void + SetContinueThreadID (lldb::tid_t tid); + + lldb::tid_t + GetContinueThreadID () const { return m_continue_tid; } + + lldb_private::Error + SetSTDIOFileDescriptor (int fd); + + static void + STDIOReadThreadBytesReceived (void *baton, const void *src, size_t src_len); + private: bool DebugserverProcessReaped (lldb::pid_t pid); @@ -345,6 +499,38 @@ private: bool KillSpawnedProcess (lldb::pid_t pid); + bool + IsGdbServer () + { + return !m_is_platform; + } + + /// Launch a process from lldb-gdbserver + lldb_private::Error + LaunchDebugServerProcess (); + + /// Launch a process from lldb-platform + lldb_private::Error + LaunchPlatformProcess (); + + void + HandleInferiorState_Exited (lldb_private::NativeProcessProtocol *process); + + void + HandleInferiorState_Stopped (lldb_private::NativeProcessProtocol *process); + + void + FlushInferiorOutput (); + + lldb_private::NativeThreadProtocolSP + GetThreadFromSuffix (StringExtractorGDBRemote &packet); + + uint32_t + GetNextSavedRegistersID (); + + void + MaybeCloseInferiorTerminalConnection (); + //------------------------------------------------------------------ // For GDBRemoteCommunicationServer only //------------------------------------------------------------------ diff --git a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp index 521e354..5614a26 100644 --- a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp +++ b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp @@ -61,7 +61,9 @@ // Project includes #include "lldb/Host/Host.h" +#include "Plugins/Process/Utility/FreeBSDSignals.h" #include "Plugins/Process/Utility/InferiorCallPOSIX.h" +#include "Plugins/Process/Utility/LinuxSignals.h" #include "Plugins/Process/Utility/StopInfoMachException.h" #include "Plugins/Platform/MacOSX/PlatformRemoteiOS.h" #include "Utility/StringExtractorGDBRemote.h" @@ -285,7 +287,8 @@ ProcessGDBRemote::ProcessGDBRemote(Target& target, Listener &listener) : m_waiting_for_attach (false), m_destroy_tried_resuming (false), m_command_sp (), - m_breakpoint_pc_offset (0) + m_breakpoint_pc_offset (0), + m_unix_signals_sp (new UnixSignals ()) { m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); @@ -628,6 +631,7 @@ ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wa Error ProcessGDBRemote::DoConnectRemote (Stream *strm, const char *remote_url) { + Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); Error error (WillLaunchOrAttach ()); if (error.Fail()) @@ -678,7 +682,11 @@ ProcessGDBRemote::DoConnectRemote (Stream *strm, const char *remote_url) error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); } - if (error.Success() + if (log) + log->Printf ("ProcessGDBRemote::%s pid %" PRIu64 ": normalizing target architecture initial triple: %s (GetTarget().GetArchitecture().IsValid() %s, m_gdb_comm.GetHostArchitecture().IsValid(): %s)", __FUNCTION__, GetID (), GetTarget ().GetArchitecture ().GetTriple ().getTriple ().c_str (), GetTarget ().GetArchitecture ().IsValid () ? "true" : "false", m_gdb_comm.GetHostArchitecture ().IsValid () ? "true" : "false"); + + + if (error.Success() && !GetTarget().GetArchitecture().IsValid() && m_gdb_comm.GetHostArchitecture().IsValid()) { @@ -689,6 +697,42 @@ ProcessGDBRemote::DoConnectRemote (Stream *strm, const char *remote_url) GetTarget().SetArchitecture(m_gdb_comm.GetHostArchitecture()); } + if (log) + log->Printf ("ProcessGDBRemote::%s pid %" PRIu64 ": normalized target architecture triple: %s", __FUNCTION__, GetID (), GetTarget ().GetArchitecture ().GetTriple ().getTriple ().c_str ()); + + // Set the Unix signals properly for the target. + // FIXME Add a gdb-remote packet to discover dynamically. + if (error.Success ()) + { + const ArchSpec arch_spec = GetTarget ().GetArchitecture (); + if (arch_spec.IsValid ()) + { + if (log) + log->Printf ("ProcessGDBRemote::%s pid %" PRIu64 ": determining unix signals type based on architecture %s, triple %s", __FUNCTION__, GetID (), arch_spec.GetArchitectureName () ? arch_spec.GetArchitectureName () : "", arch_spec.GetTriple ().getTriple ().c_str ()); + + switch (arch_spec.GetTriple ().getOS ()) + { + case llvm::Triple::Linux: + m_unix_signals_sp.reset (new process_linux::LinuxSignals ()); + if (log) + log->Printf ("ProcessGDBRemote::%s using Linux unix signals type for pid %" PRIu64, __FUNCTION__, GetID ()); + break; + case llvm::Triple::OpenBSD: + case llvm::Triple::FreeBSD: + case llvm::Triple::NetBSD: + m_unix_signals_sp.reset (new FreeBSDSignals ()); + if (log) + log->Printf ("ProcessGDBRemote::%s using *BSD unix signals type for pid %" PRIu64, __FUNCTION__, GetID ()); + break; + default: + m_unix_signals_sp.reset (new UnixSignals ()); + if (log) + log->Printf ("ProcessGDBRemote::%s using generic unix signals type for pid %" PRIu64, __FUNCTION__, GetID ()); + break; + } + } + } + return error; } @@ -1040,6 +1084,13 @@ ProcessGDBRemote::DidLaunch () DidLaunchOrAttach (); } +UnixSignals& +ProcessGDBRemote::GetUnixSignals () +{ + assert (m_unix_signals_sp && "m_unix_signals_sp is null"); + return *m_unix_signals_sp; +} + Error ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid) { @@ -2231,6 +2282,7 @@ ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Erro lldb::addr_t ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) { + lldb_private::Log *log (lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_EXPRESSIONS)); addr_t allocated_addr = LLDB_INVALID_ADDRESS; LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); @@ -2256,7 +2308,11 @@ ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &er eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) m_addr_to_mmap_size[allocated_addr] = size; else + { allocated_addr = LLDB_INVALID_ADDRESS; + if (log) + log->Printf ("ProcessGDBRemote::%s no direct stub support for memory allocation, and InferiorCallMmap also failed - is stub missing register context save/restore capability?", __FUNCTION__); + } break; } diff --git a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.h b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.h index c7177e9..baee872 100644 --- a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.h +++ b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.h @@ -91,6 +91,9 @@ public: virtual void DidLaunch (); + lldb_private::UnixSignals& + GetUnixSignals () override; + virtual lldb_private::Error WillAttachToProcessWithID (lldb::pid_t pid); @@ -305,8 +308,8 @@ protected: bool ParseRegisters(lldb_private::ScriptInterpreterObject *registers_array); - virtual const lldb::DataBufferSP - GetAuxvData(); + const lldb::DataBufferSP + GetAuxvData() override; lldb_private::StructuredData::ObjectSP GetExtendedInfoForThread (lldb::tid_t tid); @@ -357,7 +360,9 @@ protected: bool m_destroy_tried_resuming; lldb::CommandObjectSP m_command_sp; int64_t m_breakpoint_pc_offset; - + std::shared_ptr m_unix_signals_sp; + + bool StartAsyncThread (); diff --git a/lldb/source/Target/CMakeLists.txt b/lldb/source/Target/CMakeLists.txt index b83cdf5..c45e62a 100644 --- a/lldb/source/Target/CMakeLists.txt +++ b/lldb/source/Target/CMakeLists.txt @@ -10,6 +10,8 @@ add_lldb_library(lldbTarget JITLoaderList.cpp LanguageRuntime.cpp Memory.cpp + NativeRegisterContext.cpp + NativeRegisterContextRegisterInfo.cpp ObjCLanguageRuntime.cpp OperatingSystem.cpp PathMappingList.cpp diff --git a/lldb/source/Target/NativeRegisterContext.cpp b/lldb/source/Target/NativeRegisterContext.cpp new file mode 100644 index 0000000..d84e227 --- /dev/null +++ b/lldb/source/Target/NativeRegisterContext.cpp @@ -0,0 +1,470 @@ +//===-- NativeRegisterContext.cpp -------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "lldb/Target/NativeRegisterContext.h" + +#include "lldb/Core/Log.h" +#include "lldb/Core/RegisterValue.h" + +#include "lldb/lldb-private-log.h" + +#include "Host/common/NativeProcessProtocol.h" +#include "Host/common/NativeThreadProtocol.h" + +using namespace lldb; +using namespace lldb_private; + +NativeRegisterContext::NativeRegisterContext (NativeThreadProtocol &thread, uint32_t concrete_frame_idx) : + m_thread (thread), + m_concrete_frame_idx (concrete_frame_idx) +{ +} + +//---------------------------------------------------------------------- +// Destructor +//---------------------------------------------------------------------- +NativeRegisterContext::~NativeRegisterContext() +{ +} + +// FIXME revisit invalidation, process stop ids, etc. Right now we don't +// support caching in NativeRegisterContext. We can do this later by +// utilizing NativeProcessProtocol::GetStopID () and adding a stop id to +// NativeRegisterContext. + +// void +// NativeRegisterContext::InvalidateIfNeeded (bool force) +// { +// ProcessSP process_sp (m_thread.GetProcess()); +// bool invalidate = force; +// uint32_t process_stop_id = UINT32_MAX; + +// if (process_sp) +// process_stop_id = process_sp->GetStopID(); +// else +// invalidate = true; + +// if (!invalidate) +// invalidate = process_stop_id != GetStopID(); + +// if (invalidate) +// { +// InvalidateAllRegisters (); +// SetStopID (process_stop_id); +// } +// } + + +const RegisterInfo * +NativeRegisterContext::GetRegisterInfoByName (const char *reg_name, uint32_t start_idx) +{ + if (reg_name && reg_name[0]) + { + const uint32_t num_registers = GetRegisterCount(); + for (uint32_t reg = start_idx; reg < num_registers; ++reg) + { + const RegisterInfo * reg_info = GetRegisterInfoAtIndex(reg); + + if ((reg_info->name != nullptr && ::strcasecmp (reg_info->name, reg_name) == 0) || + (reg_info->alt_name != nullptr && ::strcasecmp (reg_info->alt_name, reg_name) == 0)) + { + return reg_info; + } + } + } + return nullptr; +} + +const RegisterInfo * +NativeRegisterContext::GetRegisterInfo (uint32_t kind, uint32_t num) +{ + const uint32_t reg_num = ConvertRegisterKindToRegisterNumber(kind, num); + if (reg_num == LLDB_INVALID_REGNUM) + return nullptr; + return GetRegisterInfoAtIndex (reg_num); +} + +const char * +NativeRegisterContext::GetRegisterName (uint32_t reg) +{ + const RegisterInfo * reg_info = GetRegisterInfoAtIndex(reg); + if (reg_info) + return reg_info->name; + return nullptr; +} + +const char* +NativeRegisterContext::GetRegisterSetNameForRegisterAtIndex (uint32_t reg_index) const +{ + const RegisterInfo *const reg_info = GetRegisterInfoAtIndex(reg_index); + if (!reg_info) + return nullptr; + + for (uint32_t set_index = 0; set_index < GetRegisterSetCount (); ++set_index) + { + const RegisterSet *const reg_set = GetRegisterSet (set_index); + if (!reg_set) + continue; + + for (uint32_t reg_num_index = 0; reg_num_index < reg_set->num_registers; ++reg_num_index) + { + const uint32_t reg_num = reg_set->registers[reg_num_index]; + // FIXME double check we're checking the right register kind here. + if (reg_info->kinds[RegisterKind::eRegisterKindLLDB] == reg_num) + { + // The given register is a member of this register set. Return the register set name. + return reg_set->name; + } + } + } + + // Didn't find it. + return nullptr; +} + +lldb::addr_t +NativeRegisterContext::GetPC (lldb::addr_t fail_value) +{ + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD)); + + uint32_t reg = ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC); + if (log) + log->Printf ("NativeRegisterContext::%s using reg index %" PRIu32 " (default %" PRIu64 ")", __FUNCTION__, reg, fail_value); + + const uint64_t retval = ReadRegisterAsUnsigned (reg, fail_value); + + if (log) + log->Printf ("NativeRegisterContext::%s " PRIu32 " retval %" PRIu64, __FUNCTION__, retval); + + return retval; +} + +Error +NativeRegisterContext::SetPC (lldb::addr_t pc) +{ + uint32_t reg = ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC); + return WriteRegisterFromUnsigned (reg, pc); +} + +lldb::addr_t +NativeRegisterContext::GetSP (lldb::addr_t fail_value) +{ + uint32_t reg = ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP); + return ReadRegisterAsUnsigned (reg, fail_value); +} + +Error +NativeRegisterContext::SetSP (lldb::addr_t sp) +{ + uint32_t reg = ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP); + return WriteRegisterFromUnsigned (reg, sp); +} + +lldb::addr_t +NativeRegisterContext::GetFP (lldb::addr_t fail_value) +{ + uint32_t reg = ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FP); + return ReadRegisterAsUnsigned (reg, fail_value); +} + +Error +NativeRegisterContext::SetFP (lldb::addr_t fp) +{ + uint32_t reg = ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FP); + return WriteRegisterFromUnsigned (reg, fp); +} + +lldb::addr_t +NativeRegisterContext::GetReturnAddress (lldb::addr_t fail_value) +{ + uint32_t reg = ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_RA); + return ReadRegisterAsUnsigned (reg, fail_value); +} + +lldb::addr_t +NativeRegisterContext::GetFlags (lldb::addr_t fail_value) +{ + uint32_t reg = ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FLAGS); + return ReadRegisterAsUnsigned (reg, fail_value); +} + + +lldb::addr_t +NativeRegisterContext::ReadRegisterAsUnsigned (uint32_t reg, lldb::addr_t fail_value) +{ + if (reg != LLDB_INVALID_REGNUM) + return ReadRegisterAsUnsigned (GetRegisterInfoAtIndex (reg), fail_value); + return fail_value; +} + +uint64_t +NativeRegisterContext::ReadRegisterAsUnsigned (const RegisterInfo *reg_info, lldb::addr_t fail_value) +{ + Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD)); + + if (reg_info) + { + RegisterValue value; + Error error = ReadRegister (reg_info, value); + if (error.Success ()) + { + if (log) + log->Printf ("NativeRegisterContext::%s ReadRegister() succeeded, value %" PRIu64, __FUNCTION__, value.GetAsUInt64()); + return value.GetAsUInt64(); + } + else + { + if (log) + log->Printf ("NativeRegisterContext::%s ReadRegister() failed, error %s", __FUNCTION__, error.AsCString ()); + } + } + else + { + if (log) + log->Printf ("NativeRegisterContext::%s ReadRegister() null reg_info", __FUNCTION__); + } + return fail_value; +} + +Error +NativeRegisterContext::WriteRegisterFromUnsigned (uint32_t reg, uint64_t uval) +{ + if (reg == LLDB_INVALID_REGNUM) + return Error ("NativeRegisterContext::%s (): reg is invalid", __FUNCTION__); + return WriteRegisterFromUnsigned (GetRegisterInfoAtIndex (reg), uval); +} + +Error +NativeRegisterContext::WriteRegisterFromUnsigned (const RegisterInfo *reg_info, uint64_t uval) +{ + assert (reg_info); + if (!reg_info) + return Error ("reg_info is nullptr"); + + RegisterValue value; + if (!value.SetUInt(uval, reg_info->byte_size)) + return Error ("RegisterValue::SetUInt () failed"); + + return WriteRegister (reg_info, value); +} + +lldb::tid_t +NativeRegisterContext::GetThreadID() const +{ + return m_thread.GetID(); +} + +uint32_t +NativeRegisterContext::NumSupportedHardwareBreakpoints () +{ + return 0; +} + +uint32_t +NativeRegisterContext::SetHardwareBreakpoint (lldb::addr_t addr, size_t size) +{ + return LLDB_INVALID_INDEX32; +} + +bool +NativeRegisterContext::ClearHardwareBreakpoint (uint32_t hw_idx) +{ + return false; +} + + +uint32_t +NativeRegisterContext::NumSupportedHardwareWatchpoints () +{ + return 0; +} + +uint32_t +NativeRegisterContext::SetHardwareWatchpoint (lldb::addr_t addr, size_t size, uint32_t watch_flags) +{ + return LLDB_INVALID_INDEX32; +} + +bool +NativeRegisterContext::ClearHardwareWatchpoint (uint32_t hw_index) +{ + return false; +} + +bool +NativeRegisterContext::HardwareSingleStep (bool enable) +{ + return false; +} + +Error +NativeRegisterContext::ReadRegisterValueFromMemory ( + const RegisterInfo *reg_info, + lldb::addr_t src_addr, + lldb::addr_t src_len, + RegisterValue ®_value) +{ + Error error; + if (reg_info == nullptr) + { + error.SetErrorString ("invalid register info argument."); + return error; + } + + + // Moving from addr into a register + // + // Case 1: src_len == dst_len + // + // |AABBCCDD| Address contents + // |AABBCCDD| Register contents + // + // Case 2: src_len > dst_len + // + // Error! (The register should always be big enough to hold the data) + // + // Case 3: src_len < dst_len + // + // |AABB| Address contents + // |AABB0000| Register contents [on little-endian hardware] + // |0000AABB| Register contents [on big-endian hardware] + if (src_len > RegisterValue::kMaxRegisterByteSize) + { + error.SetErrorString ("register too small to receive memory data"); + return error; + } + + const lldb::addr_t dst_len = reg_info->byte_size; + + if (src_len > dst_len) + { + error.SetErrorStringWithFormat("%" PRIu64 " bytes is too big to store in register %s (%" PRIu64 " bytes)", src_len, reg_info->name, dst_len); + return error; + } + + NativeProcessProtocolSP process_sp (m_thread.GetProcess ()); + if (!process_sp) + { + error.SetErrorString("invalid process"); + return error; + } + + uint8_t src[RegisterValue::kMaxRegisterByteSize]; + + // Read the memory + lldb::addr_t bytes_read; + error = process_sp->ReadMemory (src_addr, src, src_len, bytes_read); + if (error.Fail ()) + return error; + + // Make sure the memory read succeeded... + if (bytes_read != src_len) + { + // This might happen if we read _some_ bytes but not all + error.SetErrorStringWithFormat("read %" PRIu64 " of %" PRIu64 " bytes", bytes_read, src_len); + return error; + } + + // We now have a memory buffer that contains the part or all of the register + // value. Set the register value using this memory data. + // TODO: we might need to add a parameter to this function in case the byte + // order of the memory data doesn't match the process. For now we are assuming + // they are the same. + lldb::ByteOrder byte_order; + if (!process_sp->GetByteOrder (byte_order)) + { + error.SetErrorString ( "NativeProcessProtocol::GetByteOrder () failed"); + return error; + } + + reg_value.SetFromMemoryData ( + reg_info, + src, + src_len, + byte_order, + error); + + return error; +} + +Error +NativeRegisterContext::WriteRegisterValueToMemory ( + const RegisterInfo *reg_info, + lldb::addr_t dst_addr, + lldb::addr_t dst_len, + const RegisterValue ®_value) +{ + + uint8_t dst[RegisterValue::kMaxRegisterByteSize]; + + Error error; + + NativeProcessProtocolSP process_sp (m_thread.GetProcess ()); + if (process_sp) + { + + // TODO: we might need to add a parameter to this function in case the byte + // order of the memory data doesn't match the process. For now we are assuming + // they are the same. + lldb::ByteOrder byte_order; + if (!process_sp->GetByteOrder (byte_order)) + return Error ("NativeProcessProtocol::GetByteOrder () failed"); + + const lldb::addr_t bytes_copied = reg_value.GetAsMemoryData ( + reg_info, + dst, + dst_len, + byte_order, + error); + + if (error.Success()) + { + if (bytes_copied == 0) + { + error.SetErrorString("byte copy failed."); + } + else + { + lldb::addr_t bytes_written; + error = process_sp->WriteMemory (dst_addr, dst, bytes_copied, bytes_written); + if (error.Fail ()) + return error; + + if (bytes_written != bytes_copied) + { + // This might happen if we read _some_ bytes but not all + error.SetErrorStringWithFormat("only wrote %" PRIu64 " of %" PRIu64 " bytes", bytes_written, bytes_copied); + } + } + } + } + else + error.SetErrorString("invalid process"); + + return error; +} + +uint32_t +NativeRegisterContext::ConvertRegisterKindToRegisterNumber (uint32_t kind, uint32_t num) const +{ + const uint32_t num_regs = GetRegisterCount(); + + assert (kind < kNumRegisterKinds); + for (uint32_t reg_idx = 0; reg_idx < num_regs; ++reg_idx) + { + const RegisterInfo *reg_info = GetRegisterInfoAtIndex (reg_idx); + + if (reg_info->kinds[kind] == num) + return reg_idx; + } + + return LLDB_INVALID_REGNUM; +} + + diff --git a/lldb/source/Target/NativeRegisterContextRegisterInfo.cpp b/lldb/source/Target/NativeRegisterContextRegisterInfo.cpp new file mode 100644 index 0000000..e370145 --- /dev/null +++ b/lldb/source/Target/NativeRegisterContextRegisterInfo.cpp @@ -0,0 +1,44 @@ +//===-- NativeRegisterContex.cpp --------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "lldb/lldb-types.h" +#include "lldb/lldb-private-forward.h" +#include "lldb/Target/NativeRegisterContextRegisterInfo.h" + +using namespace lldb_private; + +NativeRegisterContextRegisterInfo::NativeRegisterContextRegisterInfo (NativeThreadProtocol &thread, + uint32_t concrete_frame_idx, + RegisterInfoInterface *register_info_interface) : + NativeRegisterContext (thread, concrete_frame_idx), + m_register_info_interface_up (register_info_interface) +{ + assert (register_info_interface && "null register_info_interface"); +} + +uint32_t +NativeRegisterContextRegisterInfo::GetRegisterCount () const +{ + return m_register_info_interface_up->GetRegisterCount (); +} + +const RegisterInfo * +NativeRegisterContextRegisterInfo::GetRegisterInfoAtIndex (uint32_t reg_index) const +{ + if (reg_index <= GetRegisterCount ()) + return m_register_info_interface_up->GetRegisterInfo () + reg_index; + else + return nullptr; +} + +const RegisterInfoInterface& +NativeRegisterContextRegisterInfo::GetRegisterInfoInterface () const +{ + return *m_register_info_interface_up; +} diff --git a/lldb/source/Target/Platform.cpp b/lldb/source/Target/Platform.cpp index 09ba8b4..4828aa9 100644 --- a/lldb/source/Target/Platform.cpp +++ b/lldb/source/Target/Platform.cpp @@ -527,12 +527,10 @@ RecurseCopy_Callback (void *baton, case FileSpec::eFileTypeInvalid: case FileSpec::eFileTypeOther: case FileSpec::eFileTypeUnknown: + default: rc_baton->error.SetErrorStringWithFormat("invalid file detected during copy: %s", src.GetPath().c_str()); return FileSpec::eEnumerateDirectoryResultQuit; // got an error, bail out break; - default: - return FileSpec::eEnumerateDirectoryResultQuit; // unsupported file type, bail out - break; } } @@ -1189,6 +1187,27 @@ Platform::CalculateMD5 (const FileSpec& file_spec, return false; } +Error +Platform::LaunchNativeProcess ( + ProcessLaunchInfo &launch_info, + lldb_private::NativeProcessProtocol::NativeDelegate &native_delegate, + NativeProcessProtocolSP &process_sp) +{ + // Platforms should override this implementation if they want to + // support lldb-gdbserver. + return Error("unimplemented"); +} + +Error +Platform::AttachNativeProcess (lldb::pid_t pid, + lldb_private::NativeProcessProtocol::NativeDelegate &native_delegate, + NativeProcessProtocolSP &process_sp) +{ + // Platforms should override this implementation if they want to + // support lldb-gdbserver. + return Error("unimplemented"); +} + void Platform::SetLocalCacheDirectory (const char* local) { diff --git a/lldb/source/Target/Process.cpp b/lldb/source/Target/Process.cpp index e50cc4a..7e11bde 100644 --- a/lldb/source/Target/Process.cpp +++ b/lldb/source/Target/Process.cpp @@ -2529,6 +2529,7 @@ Process::CanJIT () { if (m_can_jit == eCanJITDontKnow) { + Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); Error err; uint64_t allocated_memory = AllocateMemory(8, @@ -2536,9 +2537,17 @@ Process::CanJIT () err); if (err.Success()) + { m_can_jit = eCanJITYes; + if (log) + log->Printf ("Process::%s pid %" PRIu64 " allocation test passed, CanJIT () is true", __FUNCTION__, GetID ()); + } else + { m_can_jit = eCanJITNo; + if (log) + log->Printf ("Process::%s pid %" PRIu64 " allocation test failed, CanJIT () is false: %s", __FUNCTION__, GetID (), err.AsCString ()); + } DeallocateMemory (allocated_memory); } @@ -2788,6 +2797,12 @@ Process::GetDynamicLoader () return m_dyld_ap.get(); } +const lldb::DataBufferSP +Process::GetAuxvData() +{ + return DataBufferSP (); +} + JITLoaderList & Process::GetJITLoaders () { diff --git a/lldb/source/Utility/StringExtractor.cpp b/lldb/source/Utility/StringExtractor.cpp index 0209567..8747853 100644 --- a/lldb/source/Utility/StringExtractor.cpp +++ b/lldb/source/Utility/StringExtractor.cpp @@ -419,6 +419,18 @@ StringExtractor::GetHexByteString (std::string &str) } size_t +StringExtractor::GetHexByteStringFixedLength (std::string &str, uint32_t nibble_length) +{ + str.clear(); + + uint32_t nibble_count = 0; + for (const char *pch = Peek(); (nibble_count < nibble_length) && (pch != nullptr); str.append(1, GetHexU8(0, false)), pch = Peek (), nibble_count += 2) + {} + + return str.size(); +} + +size_t StringExtractor::GetHexByteStringTerminatedBy (std::string &str, char terminator) { @@ -428,6 +440,7 @@ StringExtractor::GetHexByteStringTerminatedBy (std::string &str, str.append(1, ch); if (Peek() && *Peek() == terminator) return str.size(); + str.clear(); return str.size(); } diff --git a/lldb/source/Utility/StringExtractor.h b/lldb/source/Utility/StringExtractor.h index 2b9e886..6974993 100644 --- a/lldb/source/Utility/StringExtractor.h +++ b/lldb/source/Utility/StringExtractor.h @@ -129,6 +129,9 @@ public: GetHexByteString (std::string &str); size_t + GetHexByteStringFixedLength (std::string &str, uint32_t nibble_length); + + size_t GetHexByteStringTerminatedBy (std::string &str, char terminator); diff --git a/lldb/source/Utility/StringExtractorGDBRemote.cpp b/lldb/source/Utility/StringExtractorGDBRemote.cpp index c8633d7..17717db 100644 --- a/lldb/source/Utility/StringExtractorGDBRemote.cpp +++ b/lldb/source/Utility/StringExtractorGDBRemote.cpp @@ -179,6 +179,7 @@ StringExtractorGDBRemote::GetServerPacketType () const if (PACKET_STARTS_WITH ("qSpeedTest:")) return eServerPacketType_qSpeedTest; if (PACKET_MATCHES ("qShlibInfoAddr")) return eServerPacketType_qShlibInfoAddr; if (PACKET_MATCHES ("qStepPacketSupported")) return eServerPacketType_qStepPacketSupported; + if (PACKET_STARTS_WITH ("qSupported")) return eServerPacketType_qSupported; if (PACKET_MATCHES ("qSyncThreadStateSupported")) return eServerPacketType_qSyncThreadStateSupported; break; @@ -199,6 +200,10 @@ StringExtractorGDBRemote::GetServerPacketType () const if (PACKET_STARTS_WITH ("qWatchpointSupportInfo:")) return eServerPacketType_qWatchpointSupportInfo; if (PACKET_MATCHES ("qWatchpointSupportInfo")) return eServerPacketType_qWatchpointSupportInfoSupported; break; + + case 'X': + if (PACKET_STARTS_WITH ("qXfer:auxv:read::")) return eServerPacketType_qXfer_auxv_read; + break; } break; case 'v': diff --git a/lldb/source/Utility/StringExtractorGDBRemote.h b/lldb/source/Utility/StringExtractorGDBRemote.h index e73dd97..e16403c 100644 --- a/lldb/source/Utility/StringExtractorGDBRemote.h +++ b/lldb/source/Utility/StringExtractorGDBRemote.h @@ -106,12 +106,14 @@ public: eServerPacketType_qRegisterInfo, eServerPacketType_qShlibInfoAddr, eServerPacketType_qStepPacketSupported, + eServerPacketType_qSupported, eServerPacketType_qSyncThreadStateSupported, eServerPacketType_qThreadExtraInfo, eServerPacketType_qThreadStopInfo, eServerPacketType_qVAttachOrWaitSupported, eServerPacketType_qWatchpointSupportInfo, eServerPacketType_qWatchpointSupportInfoSupported, + eServerPacketType_qXfer_auxv_read, eServerPacketType_vAttach, eServerPacketType_vAttachWait, diff --git a/lldb/test/tools/lldb-gdbserver/TestGdbRemoteAuxvSupport.py b/lldb/test/tools/lldb-gdbserver/TestGdbRemoteAuxvSupport.py index 67b575b..358618b 100644 --- a/lldb/test/tools/lldb-gdbserver/TestGdbRemoteAuxvSupport.py +++ b/lldb/test/tools/lldb-gdbserver/TestGdbRemoteAuxvSupport.py @@ -86,7 +86,6 @@ class TestGdbRemoteAuxvSupport(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_supports_auxv_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -111,7 +110,6 @@ class TestGdbRemoteAuxvSupport(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_auxv_data_is_correct_size_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -152,7 +150,6 @@ class TestGdbRemoteAuxvSupport(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_auxv_keys_look_valid_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -200,7 +197,6 @@ class TestGdbRemoteAuxvSupport(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_auxv_chunked_reads_work_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() diff --git a/lldb/test/tools/lldb-gdbserver/TestGdbRemoteExpeditedRegisters.py b/lldb/test/tools/lldb-gdbserver/TestGdbRemoteExpeditedRegisters.py index f4b6fa0..11030a0 100644 --- a/lldb/test/tools/lldb-gdbserver/TestGdbRemoteExpeditedRegisters.py +++ b/lldb/test/tools/lldb-gdbserver/TestGdbRemoteExpeditedRegisters.py @@ -62,7 +62,6 @@ class TestGdbRemoteExpeditedRegisters(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_stop_notification_contains_any_registers_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -87,7 +86,6 @@ class TestGdbRemoteExpeditedRegisters(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_stop_notification_contains_no_duplicate_registers_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -107,7 +105,6 @@ class TestGdbRemoteExpeditedRegisters(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_stop_notification_contains_pc_register_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -127,7 +124,6 @@ class TestGdbRemoteExpeditedRegisters(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_stop_notification_contains_fp_register_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -147,7 +143,6 @@ class TestGdbRemoteExpeditedRegisters(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_stop_notification_contains_sp_register_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() diff --git a/lldb/test/tools/lldb-gdbserver/TestGdbRemoteRegisterState.py b/lldb/test/tools/lldb-gdbserver/TestGdbRemoteRegisterState.py index 0d1934a..979c973 100644 --- a/lldb/test/tools/lldb-gdbserver/TestGdbRemoteRegisterState.py +++ b/lldb/test/tools/lldb-gdbserver/TestGdbRemoteRegisterState.py @@ -100,7 +100,6 @@ class TestGdbRemoteRegisterState(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_grp_register_save_restore_works_with_suffix_llgs_dwarf(self): USE_THREAD_SUFFIX = True self.init_llgs_test() @@ -119,7 +118,6 @@ class TestGdbRemoteRegisterState(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_grp_register_save_restore_works_no_suffix_llgs_dwarf(self): USE_THREAD_SUFFIX = False self.init_llgs_test() diff --git a/lldb/test/tools/lldb-gdbserver/TestGdbRemoteSingleStep.py b/lldb/test/tools/lldb-gdbserver/TestGdbRemoteSingleStep.py index 2377ce1..ceb562b 100644 --- a/lldb/test/tools/lldb-gdbserver/TestGdbRemoteSingleStep.py +++ b/lldb/test/tools/lldb-gdbserver/TestGdbRemoteSingleStep.py @@ -15,7 +15,6 @@ class TestGdbRemoteSingleStep(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_single_step_only_steps_one_instruction_with_s_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() diff --git a/lldb/test/tools/lldb-gdbserver/TestGdbRemoteThreadsInStopReply.py b/lldb/test/tools/lldb-gdbserver/TestGdbRemoteThreadsInStopReply.py index e6a664a..6fbed17 100644 --- a/lldb/test/tools/lldb-gdbserver/TestGdbRemoteThreadsInStopReply.py +++ b/lldb/test/tools/lldb-gdbserver/TestGdbRemoteThreadsInStopReply.py @@ -83,7 +83,6 @@ class TestGdbRemoteThreadsInStopReply(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_QListThreadsInStopReply_supported_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -105,7 +104,6 @@ class TestGdbRemoteThreadsInStopReply(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_stop_reply_reports_multiple_threads_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -127,8 +125,7 @@ class TestGdbRemoteThreadsInStopReply(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() - def test_no_QThreadsInStopReply_supplies_no_threads_llgs_dwarf(self): + def test_no_QListThreadsInStopReply_supplies_no_threads_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() self.set_inferior_startup_launch() @@ -164,7 +161,6 @@ class TestGdbRemoteThreadsInStopReply(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_stop_reply_reports_correct_threads_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() diff --git a/lldb/test/tools/lldb-gdbserver/TestGdbRemote_vCont.py b/lldb/test/tools/lldb-gdbserver/TestGdbRemote_vCont.py index 8f7d927..2000247 100644 --- a/lldb/test/tools/lldb-gdbserver/TestGdbRemote_vCont.py +++ b/lldb/test/tools/lldb-gdbserver/TestGdbRemote_vCont.py @@ -41,8 +41,6 @@ class TestGdbRemote_vCont(gdbremote_testcase.GdbRemoteTestCaseBase): self.vCont_supports_c() @llgs_test - @dwarf_test - @unittest2.expectedFailure() def test_vCont_supports_c_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -57,7 +55,6 @@ class TestGdbRemote_vCont(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_vCont_supports_C_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -72,7 +69,6 @@ class TestGdbRemote_vCont(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_vCont_supports_s_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -87,7 +83,6 @@ class TestGdbRemote_vCont(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_vCont_supports_S_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -103,7 +98,6 @@ class TestGdbRemote_vCont(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_single_step_only_steps_one_instruction_with_Hc_vCont_s_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -120,7 +114,6 @@ class TestGdbRemote_vCont(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_single_step_only_steps_one_instruction_with_vCont_s_thread_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -128,7 +121,5 @@ class TestGdbRemote_vCont(gdbremote_testcase.GdbRemoteTestCaseBase): self.single_step_only_steps_one_instruction(use_Hc_packet=False, step_instruction="vCont;s:{thread}") - - if __name__ == '__main__': unittest2.main() diff --git a/lldb/test/tools/lldb-gdbserver/TestLldbGdbServer.py b/lldb/test/tools/lldb-gdbserver/TestLldbGdbServer.py index bcdc792..d45589c 100644 --- a/lldb/test/tools/lldb-gdbserver/TestLldbGdbServer.py +++ b/lldb/test/tools/lldb-gdbserver/TestLldbGdbServer.py @@ -63,7 +63,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): self.thread_suffix_supported() @llgs_test - @unittest2.expectedFailure() def test_thread_suffix_supported_llgs(self): self.init_llgs_test() self.thread_suffix_supported() @@ -85,7 +84,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): self.list_threads_in_stop_reply_supported() @llgs_test - @unittest2.expectedFailure() def test_list_threads_in_stop_reply_supported_llgs(self): self.init_llgs_test() self.list_threads_in_stop_reply_supported() @@ -143,7 +141,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_inferior_exit_0_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -176,7 +173,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_inferior_exit_42_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -207,7 +203,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_c_packet_works_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -240,7 +235,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_inferior_print_exit_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -272,7 +266,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_first_launch_stop_reply_thread_matches_first_qC_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -308,7 +301,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_qProcessInfo_returns_running_process_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -343,7 +335,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_attach_commandline_qProcessInfo_reports_correct_pid_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -376,7 +367,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_qProcessInfo_reports_valid_endian_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -410,7 +400,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_attach_commandline_continue_app_exits_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -445,7 +434,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_attach_commandline_kill_after_initial_stop_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -484,7 +472,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_qRegisterInfo_returns_one_valid_result_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -519,7 +506,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_qRegisterInfo_returns_all_valid_results_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -568,7 +554,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_qRegisterInfo_contains_required_generics_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -606,7 +591,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_qRegisterInfo_contains_at_least_one_register_set_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -635,10 +619,8 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): register_sets = { reg_info['set']:1 for reg_info in reg_infos if 'set' in reg_info } self.assertTrue("Advanced Vector Extensions" in register_sets) - @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_qRegisterInfo_contains_avx_registers_on_linux_x86_64_llgs_dwarf(self): # Skip this test if not Linux x86_64. if platform.system() != "Linux" or platform.processor() != "x86_64": @@ -673,7 +655,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_qThreadInfo_contains_thread_launch_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -690,7 +671,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_qThreadInfo_contains_thread_attach_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -735,7 +715,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_qThreadInfo_matches_qC_launch_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -752,7 +731,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_qThreadInfo_matches_qC_attach_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -810,7 +788,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_p_returns_correct_data_size_for_each_qRegisterInfo_launch_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -827,7 +804,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_p_returns_correct_data_size_for_each_qRegisterInfo_attach_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -873,7 +849,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_Hg_switches_to_3_threads_launch_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -890,7 +865,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_Hg_switches_to_3_threads_attach_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -1010,7 +984,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_Hc_then_Csignal_signals_correct_thread_launch_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -1073,7 +1046,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_m_packet_reads_memory_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -1101,7 +1073,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_qMemoryRegionInfo_is_supported_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -1165,7 +1136,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_qMemoryRegionInfo_reports_code_address_as_executable_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -1229,7 +1199,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_qMemoryRegionInfo_reports_stack_address_as_readable_writeable_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -1294,7 +1263,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_qMemoryRegionInfo_reports_heap_address_as_readable_writeable_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -1411,7 +1379,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_software_breakpoint_set_and_remove_work_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -1442,7 +1409,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_qSupported_returns_known_stub_features_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -1503,7 +1469,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_written_M_content_reads_back_correctly_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -1550,7 +1515,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_P_writes_all_gpr_registers_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() @@ -1659,7 +1623,6 @@ class LldbGdbServerTestCase(gdbremote_testcase.GdbRemoteTestCaseBase): @llgs_test @dwarf_test - @unittest2.expectedFailure() def test_P_and_p_thread_suffix_work_llgs_dwarf(self): self.init_llgs_test() self.buildDwarf() diff --git a/lldb/test/tools/lldb-gdbserver/gdbremote_testcase.py b/lldb/test/tools/lldb-gdbserver/gdbremote_testcase.py index f48131e..ba9e8f5 100644 --- a/lldb/test/tools/lldb-gdbserver/gdbremote_testcase.py +++ b/lldb/test/tools/lldb-gdbserver/gdbremote_testcase.py @@ -1024,3 +1024,4 @@ class GdbRemoteTestCaseBase(TestBase): (state_reached, step_count) = self.count_single_steps_until_true(main_thread_id, self.g_c1_c2_contents_are, args, max_step_count=5, use_Hc_packet=use_Hc_packet, step_instruction=step_instruction) self.assertTrue(state_reached) self.assertEquals(step_count, 1) + diff --git a/lldb/test/tools/lldb-gdbserver/main.cpp b/lldb/test/tools/lldb-gdbserver/main.cpp index 933b9df..5436124 100644 --- a/lldb/test/tools/lldb-gdbserver/main.cpp +++ b/lldb/test/tools/lldb-gdbserver/main.cpp @@ -92,9 +92,12 @@ signal_handler (int signo) switch (signo) { case SIGSEGV: - // Fix up the pointer we're writing to. This needs to happen if nothing intercepts the SIGSEGV - // (i.e. if somebody runs this from the command line). - longjmp(g_jump_buffer, 1); + if (g_is_segfaulting) + { + // Fix up the pointer we're writing to. This needs to happen if nothing intercepts the SIGSEGV + // (i.e. if somebody runs this from the command line). + longjmp(g_jump_buffer, 1); + } break; case SIGUSR1: if (g_is_segfaulting) diff --git a/lldb/tools/debugserver/source/RNBRemote.cpp b/lldb/tools/debugserver/source/RNBRemote.cpp index b5d7862..1f462ac 100644 --- a/lldb/tools/debugserver/source/RNBRemote.cpp +++ b/lldb/tools/debugserver/source/RNBRemote.cpp @@ -2326,6 +2326,7 @@ RNBRemote::SendStopReplyPacketForThread (nub_thread_t tid) { size_t thread_name_len = strlen(thread_name); + if (::strcspn (thread_name, "$#+-;:") == thread_name_len) ostrm << std::hex << "name:" << thread_name << ';'; else diff --git a/lldb/tools/lldb-gdbserver/lldb-gdbserver.cpp b/lldb/tools/lldb-gdbserver/lldb-gdbserver.cpp index ee5e57e..1e9808c 100644 --- a/lldb/tools/lldb-gdbserver/lldb-gdbserver.cpp +++ b/lldb/tools/lldb-gdbserver/lldb-gdbserver.cpp @@ -52,6 +52,7 @@ static struct option g_long_options[] = { "lldb-command", required_argument, NULL, 'c' }, { "log-file", required_argument, NULL, 'l' }, { "log-flags", required_argument, NULL, 'f' }, + { "attach", required_argument, NULL, 'a' }, { NULL, 0, NULL, 0 } }; @@ -59,21 +60,38 @@ static struct option g_long_options[] = //---------------------------------------------------------------------- // Watch for signals //---------------------------------------------------------------------- -int g_sigpipe_received = 0; +static int g_sigpipe_received = 0; +static int g_sighup_received_count = 0; + void signal_handler(int signo) { + Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); + + fprintf (stderr, "lldb-gdbserver:%s received signal %d\n", __FUNCTION__, signo); + if (log) + log->Printf ("lldb-gdbserver:%s received signal %d", __FUNCTION__, signo); + switch (signo) { case SIGPIPE: g_sigpipe_received = 1; break; case SIGHUP: +#if 1 + ++g_sighup_received_count; + + // For now, swallow SIGHUP. + if (log) + log->Printf ("lldb-gdbserver:%s swallowing SIGHUP (receive count=%d)", __FUNCTION__, g_sighup_received_count); + signal (SIGHUP, signal_handler); +#else // Use SIGINT first, if that does not work, use SIGHUP as a last resort. // And we should not call exit() here because it results in the global destructors // to be invoked and wreaking havoc on the threads still running. Host::SystemLog(Host::eSystemLogWarning, "SIGHUP received, exiting lldb-gdbserver...\n"); abort(); +#endif break; } } @@ -124,21 +142,221 @@ terminate_lldb_gdbserver () PluginManager::Terminate (); } +static void +run_lldb_commands (const lldb::DebuggerSP &debugger_sp, const std::vector lldb_commands) +{ + for (const auto &lldb_command : lldb_commands) + { + printf("(lldb) %s\n", lldb_command.c_str ()); + + lldb_private::CommandReturnObject result; + debugger_sp->GetCommandInterpreter ().HandleCommand (lldb_command.c_str (), eLazyBoolNo, result); + const char *output = result.GetOutputData (); + if (output && output[0]) + puts (output); + } +} + +static lldb::PlatformSP +setup_platform (const std::string platform_name) +{ + lldb::PlatformSP platform_sp; + + if (platform_name.empty()) + { + printf ("using the default platform: "); + platform_sp = Platform::GetDefaultPlatform (); + printf ("%s\n", platform_sp->GetPluginName ().AsCString ()); + return platform_sp; + } + + Error error; + platform_sp = Platform::Create (platform_name.c_str(), error); + if (error.Fail ()) + { + // the host platform isn't registered with that name (at + // least, not always. Check if the given name matches + // the default platform name. If so, use it. + if ( Platform::GetDefaultPlatform () && ( Platform::GetDefaultPlatform ()->GetPluginName () == ConstString (platform_name.c_str()) ) ) + { + platform_sp = Platform::GetDefaultPlatform (); + } + else + { + fprintf (stderr, "error: failed to create platform with name '%s'\n", platform_name.c_str()); + dump_available_platforms (stderr); + exit (1); + } + } + printf ("using platform: %s\n", platform_name.c_str ()); + + return platform_sp; +} + +void +handle_attach_to_pid (GDBRemoteCommunicationServer &gdb_server, lldb::pid_t pid) +{ + Error error = gdb_server.AttachToProcess (pid); + if (error.Fail ()) + { + fprintf (stderr, "error: failed to attach to pid %" PRIu64 ": %s\n", pid, error.AsCString()); + exit(1); + } +} + +void +handle_attach_to_process_name (GDBRemoteCommunicationServer &gdb_server, const std::string &process_name) +{ + // FIXME implement. +} + +void +handle_attach (GDBRemoteCommunicationServer &gdb_server, const std::string &attach_target) +{ + assert (!attach_target.empty () && "attach_target cannot be empty"); + + // First check if the attach_target is convertable to a long. If so, we'll use it as a pid. + char *end_p = nullptr; + const long int pid = strtol (attach_target.c_str (), &end_p, 10); + + // We'll call it a match if the entire argument is consumed. + if (end_p && static_cast (end_p - attach_target.c_str ()) == attach_target.size ()) + handle_attach_to_pid (gdb_server, static_cast (pid)); + else + handle_attach_to_process_name (gdb_server, attach_target); +} + +void +handle_launch (GDBRemoteCommunicationServer &gdb_server, int argc, const char *const argv[]) +{ + Error error; + error = gdb_server.SetLaunchArguments (argv, argc); + if (error.Fail ()) + { + fprintf (stderr, "error: failed to set launch args for '%s': %s\n", argv[0], error.AsCString()); + exit(1); + } + + unsigned int launch_flags = eLaunchFlagStopAtEntry | eLaunchFlagDebug; + + error = gdb_server.SetLaunchFlags (launch_flags); + if (error.Fail ()) + { + fprintf (stderr, "error: failed to set launch flags for '%s': %s\n", argv[0], error.AsCString()); + exit(1); + } + + error = gdb_server.LaunchProcess (); + if (error.Fail ()) + { + fprintf (stderr, "error: failed to launch '%s': %s\n", argv[0], error.AsCString()); + exit(1); + } +} + +void +start_listener (GDBRemoteCommunicationServer &gdb_server, const char *const host_and_port, const char *const progname) +{ + Error error; + + if (host_and_port && host_and_port[0]) + { + std::unique_ptr conn_ap(new ConnectionFileDescriptor()); + if (conn_ap.get()) + { + std::string final_host_and_port; + std::string listening_host; + std::string listening_port; + + // If host_and_port starts with ':', default the host to be "localhost" and expect the remainder to be the port. + if (host_and_port[0] == ':') + final_host_and_port.append ("localhost"); + final_host_and_port.append (host_and_port); + + const std::string::size_type colon_pos = final_host_and_port.find(':'); + if (colon_pos != std::string::npos) + { + listening_host = final_host_and_port.substr(0, colon_pos); + listening_port = final_host_and_port.substr(colon_pos + 1); + } + + std::string connect_url ("listen://"); + connect_url.append (final_host_and_port); + + printf ("Listening to port %s for a connection from %s...\n", listening_port.c_str (), listening_host.c_str ()); + if (conn_ap->Connect(connect_url.c_str(), &error) == eConnectionStatusSuccess) + { + printf ("Connection established.\n"); + gdb_server.SetConnection (conn_ap.release()); + } + else + { + fprintf (stderr, "failed to connect to '%s': %s\n", final_host_and_port.c_str (), error.AsCString ()); + display_usage (progname); + exit (1); + } + } + + if (gdb_server.IsConnected()) + { + // After we connected, we need to get an initial ack from... + if (gdb_server.HandshakeWithClient(&error)) + { + // We'll use a half a second timeout interval so that an exit conditions can + // be checked that often. + const uint32_t TIMEOUT_USEC = 500000; + + bool interrupt = false; + bool done = false; + while (!interrupt && !done && (g_sighup_received_count < 1)) + { + const GDBRemoteCommunication::PacketResult result = gdb_server.GetPacketAndSendResponse (TIMEOUT_USEC, error, interrupt, done); + if ((result != GDBRemoteCommunication::PacketResult::Success) && + (result != GDBRemoteCommunication::PacketResult::ErrorReplyTimeout)) + { + // We're bailing out - we only support successful handling and timeouts. + fprintf(stderr, "leaving packet loop due to PacketResult %d\n", result); + break; + } + } + + if (error.Fail()) + { + fprintf(stderr, "error: %s\n", error.AsCString()); + } + } + else + { + fprintf(stderr, "error: handshake with client failed\n"); + } + } + } + else + { + fprintf (stderr, "no connection information provided, unable to run\n"); + display_usage (progname); + exit (1); + } +} + //---------------------------------------------------------------------- // main //---------------------------------------------------------------------- int main (int argc, char *argv[]) { - const char *progname = argv[0]; + // Setup signal handlers first thing. signal (SIGPIPE, signal_handler); signal (SIGHUP, signal_handler); + + const char *progname = argv[0]; int long_option_index = 0; StreamSP log_stream_sp; Args log_args; Error error; int ch; std::string platform_name; + std::string attach_target; initialize_lldb_gdbserver (); @@ -215,6 +433,11 @@ main (int argc, char *argv[]) platform_name = optarg; break; + case 'a': // attach {pid|process_name} + if (optarg && optarg[0]) + attach_target = optarg; + break; + case 'h': /* fall-through is intentional */ case '?': show_usage = true; @@ -235,7 +458,7 @@ main (int argc, char *argv[]) ProcessGDBRemoteLog::EnableLog (log_stream_sp, 0,log_args.GetConstArgumentVector(), log_stream_sp.get()); } - // Skip any options we consumed with getopt_long_only + // Skip any options we consumed with getopt_long_only. argc -= optind; argv += optind; @@ -245,155 +468,29 @@ main (int argc, char *argv[]) exit(255); } - // Run any commands requested - for (const auto &lldb_command : lldb_commands) - { - printf("(lldb) %s\n", lldb_command.c_str ()); + // Run any commands requested. + run_lldb_commands (debugger_sp, lldb_commands); - lldb_private::CommandReturnObject result; - debugger_sp->GetCommandInterpreter ().HandleCommand (lldb_command.c_str (), eLazyBoolNo, result); - const char *output = result.GetOutputData (); - if (output && output[0]) - puts (output); - } - - // setup the platform that GDBRemoteCommunicationServer will use - lldb::PlatformSP platform_sp; - if (platform_name.empty()) - { - printf ("using the default platform: "); - platform_sp = Platform::GetDefaultPlatform (); - printf ("%s\n", platform_sp->GetPluginName ().AsCString ()); - } - else - { - Error error; - platform_sp = Platform::Create (platform_name.c_str(), error); - if (error.Fail ()) - { - // the host platform isn't registered with that name (at - // least, not always. Check if the given name matches - // the default platform name. If so, use it. - if ( Platform::GetDefaultPlatform () && ( Platform::GetDefaultPlatform ()->GetPluginName () == ConstString (platform_name.c_str()) ) ) - { - platform_sp = Platform::GetDefaultPlatform (); - } - else - { - fprintf (stderr, "error: failed to create platform with name '%s'\n", platform_name.c_str()); - dump_available_platforms (stderr); - exit (1); - } - } - printf ("using platform: %s\n", platform_name.c_str ()); - } + // Setup the platform that GDBRemoteCommunicationServer will use. + lldb::PlatformSP platform_sp = setup_platform (platform_name); const bool is_platform = false; - GDBRemoteCommunicationServer gdb_server (is_platform, platform_sp); + GDBRemoteCommunicationServer gdb_server (is_platform, platform_sp, debugger_sp); - const char *host_and_port = argv[0]; + const char *const host_and_port = argv[0]; argc -= 1; argv += 1; + // Any arguments left over are for the the program that we need to launch. If there // are no arguments, then the GDB server will start up and wait for an 'A' packet - // to launch a program, or a vAttach packet to attach to an existing process. - if (argc > 0) - { - error = gdb_server.SetLaunchArguments (argv, argc); - if (error.Fail ()) - { - fprintf (stderr, "error: failed to set launch args for '%s': %s\n", argv[0], error.AsCString()); - exit(1); - } - - unsigned int launch_flags = eLaunchFlagStopAtEntry; -#if !defined(__linux__) - // linux doesn't yet handle eLaunchFlagDebug - launch_flags |= eLaunchFlagDebug; -#endif - error = gdb_server.SetLaunchFlags (launch_flags); - if (error.Fail ()) - { - fprintf (stderr, "error: failed to set launch flags for '%s': %s\n", argv[0], error.AsCString()); - exit(1); - } - - error = gdb_server.LaunchProcess (); - if (error.Fail ()) - { - fprintf (stderr, "error: failed to launch '%s': %s\n", argv[0], error.AsCString()); - exit(1); - } - } - - if (host_and_port && host_and_port[0]) - { - std::unique_ptr conn_ap(new ConnectionFileDescriptor()); - if (conn_ap.get()) - { - std::string final_host_and_port; - std::string listening_host; - std::string listening_port; - - // If host_and_port starts with ':', default the host to be "localhost" and expect the remainder to be the port. - if (host_and_port[0] == ':') - final_host_and_port.append ("localhost"); - final_host_and_port.append (host_and_port); - - const std::string::size_type colon_pos = final_host_and_port.find(':'); - if (colon_pos != std::string::npos) - { - listening_host = final_host_and_port.substr(0, colon_pos); - listening_port = final_host_and_port.substr(colon_pos + 1); - } - - std::string connect_url ("listen://"); - connect_url.append (final_host_and_port); - - printf ("Listening to port %s for a connection from %s...\n", listening_port.c_str (), listening_host.c_str ()); - if (conn_ap->Connect(connect_url.c_str(), &error) == eConnectionStatusSuccess) - { - printf ("Connection established.\n"); - gdb_server.SetConnection (conn_ap.release()); - } - else - { - fprintf (stderr, "failed to connect to '%s': %s\n", final_host_and_port.c_str (), error.AsCString ()); - display_usage (progname); - exit (1); - } - } - - if (gdb_server.IsConnected()) - { - // After we connected, we need to get an initial ack from... - if (gdb_server.HandshakeWithClient(&error)) - { - bool interrupt = false; - bool done = false; - while (!interrupt && !done) - { - if (!gdb_server.GetPacketAndSendResponse (UINT32_MAX, error, interrupt, done)) - break; - } - - if (error.Fail()) - { - fprintf(stderr, "error: %s\n", error.AsCString()); - } - } - else - { - fprintf(stderr, "error: handshake with client failed\n"); - } - } - } - else - { - fprintf (stderr, "no connection information provided, unable to run\n"); - display_usage (progname); - exit (1); - } + // to launch a program, or a vAttach packet to attach to an existing process, unless + // explicitly asked to attach with the --attach={pid|program_name} form. + if (!attach_target.empty ()) + handle_attach (gdb_server, attach_target); + else if (argc > 0) + handle_launch (gdb_server, argc, argv); + + start_listener (gdb_server, host_and_port, progname); terminate_lldb_gdbserver (); diff --git a/lldb/tools/lldb-platform/lldb-platform.cpp b/lldb/tools/lldb-platform/lldb-platform.cpp index e18ebab..96aa0fb 100644 --- a/lldb/tools/lldb-platform/lldb-platform.cpp +++ b/lldb/tools/lldb-platform/lldb-platform.cpp @@ -286,7 +286,7 @@ main (int argc, char *argv[]) bool done = false; while (!interrupt && !done) { - if (!gdb_server.GetPacketAndSendResponse (UINT32_MAX, error, interrupt, done)) + if (gdb_server.GetPacketAndSendResponse (UINT32_MAX, error, interrupt, done) != GDBRemoteCommunication::PacketResult::Success) break; } -- 2.7.4