1 /* Target-vector operations for controlling windows child processes, for GDB.
3 Copyright (C) 1995-2019 Free Software Foundation, Inc.
5 Contributed by Cygnus Solutions, A Red Hat Company.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* Originally by Steve Chamberlain, sac@cygnus.com */
25 #include "frame.h" /* required by inferior.h */
31 #include "completer.h"
35 #include <sys/types.h>
37 /* We need at least the level of XP for CONSOLE_FONT_INFO. */
39 # if _WIN32_WINNT < 0x0501
41 # define _WIN32_WINNT 0x0501
44 # define _WIN32_WINNT 0x0501
51 #include <sys/cygwin.h>
52 #include <cygwin/version.h>
56 #include "buildsym-legacy.h"
57 #include "filenames.h"
61 #include "gdb_obstack.h"
62 #include "gdbthread.h"
68 #include "xml-support.h"
71 #include "i386-tdep.h"
72 #include "i387-tdep.h"
74 #include "windows-tdep.h"
75 #include "windows-nat.h"
77 #include "complaints.h"
78 #include "inf-child.h"
79 #include "common/gdb_tilde_expand.h"
80 #include "common/pathstuff.h"
82 #define AdjustTokenPrivileges dyn_AdjustTokenPrivileges
83 #define DebugActiveProcessStop dyn_DebugActiveProcessStop
84 #define DebugBreakProcess dyn_DebugBreakProcess
85 #define DebugSetProcessKillOnExit dyn_DebugSetProcessKillOnExit
86 #define EnumProcessModules dyn_EnumProcessModules
87 #define GetModuleInformation dyn_GetModuleInformation
88 #define LookupPrivilegeValueA dyn_LookupPrivilegeValueA
89 #define OpenProcessToken dyn_OpenProcessToken
90 #define GetConsoleFontSize dyn_GetConsoleFontSize
91 #define GetCurrentConsoleFont dyn_GetCurrentConsoleFont
93 typedef BOOL WINAPI (AdjustTokenPrivileges_ftype) (HANDLE, BOOL,
95 DWORD, PTOKEN_PRIVILEGES,
97 static AdjustTokenPrivileges_ftype *AdjustTokenPrivileges;
99 typedef BOOL WINAPI (DebugActiveProcessStop_ftype) (DWORD);
100 static DebugActiveProcessStop_ftype *DebugActiveProcessStop;
102 typedef BOOL WINAPI (DebugBreakProcess_ftype) (HANDLE);
103 static DebugBreakProcess_ftype *DebugBreakProcess;
105 typedef BOOL WINAPI (DebugSetProcessKillOnExit_ftype) (BOOL);
106 static DebugSetProcessKillOnExit_ftype *DebugSetProcessKillOnExit;
108 typedef BOOL WINAPI (EnumProcessModules_ftype) (HANDLE, HMODULE *, DWORD,
110 static EnumProcessModules_ftype *EnumProcessModules;
112 typedef BOOL WINAPI (GetModuleInformation_ftype) (HANDLE, HMODULE,
113 LPMODULEINFO, DWORD);
114 static GetModuleInformation_ftype *GetModuleInformation;
116 typedef BOOL WINAPI (LookupPrivilegeValueA_ftype) (LPCSTR, LPCSTR, PLUID);
117 static LookupPrivilegeValueA_ftype *LookupPrivilegeValueA;
119 typedef BOOL WINAPI (OpenProcessToken_ftype) (HANDLE, DWORD, PHANDLE);
120 static OpenProcessToken_ftype *OpenProcessToken;
122 typedef BOOL WINAPI (GetCurrentConsoleFont_ftype) (HANDLE, BOOL,
123 CONSOLE_FONT_INFO *);
124 static GetCurrentConsoleFont_ftype *GetCurrentConsoleFont;
126 typedef COORD WINAPI (GetConsoleFontSize_ftype) (HANDLE, DWORD);
127 static GetConsoleFontSize_ftype *GetConsoleFontSize;
131 #undef GetModuleFileNameEx
134 # define __PMAX (MAX_PATH + 1)
135 typedef DWORD WINAPI (GetModuleFileNameEx_ftype) (HANDLE, HMODULE, LPSTR, DWORD);
136 static GetModuleFileNameEx_ftype *GetModuleFileNameEx;
137 # define STARTUPINFO STARTUPINFOA
138 # define CreateProcess CreateProcessA
139 # define GetModuleFileNameEx_name "GetModuleFileNameExA"
140 # define bad_GetModuleFileNameEx bad_GetModuleFileNameExA
142 # define __PMAX PATH_MAX
143 /* The starting and ending address of the cygwin1.dll text segment. */
144 static CORE_ADDR cygwin_load_start;
145 static CORE_ADDR cygwin_load_end;
147 typedef wchar_t cygwin_buf_t;
148 typedef DWORD WINAPI (GetModuleFileNameEx_ftype) (HANDLE, HMODULE,
150 static GetModuleFileNameEx_ftype *GetModuleFileNameEx;
151 # define STARTUPINFO STARTUPINFOW
152 # define CreateProcess CreateProcessW
153 # define GetModuleFileNameEx_name "GetModuleFileNameExW"
154 # define bad_GetModuleFileNameEx bad_GetModuleFileNameExW
157 static int have_saved_context; /* True if we've saved context from a
160 static CONTEXT saved_context; /* Containes the saved context from a
164 /* If we're not using the old Cygwin header file set, define the
165 following which never should have been in the generic Win32 API
166 headers in the first place since they were our own invention... */
167 #ifndef _GNU_H_WINDOWS_H
170 FLAG_TRACE_BIT = 0x100,
174 #ifndef CONTEXT_EXTENDED_REGISTERS
175 /* This macro is only defined on ia32. It only makes sense on this target,
176 so define it as zero if not already defined. */
177 #define CONTEXT_EXTENDED_REGISTERS 0
180 #define CONTEXT_DEBUGGER_DR CONTEXT_FULL | CONTEXT_FLOATING_POINT \
181 | CONTEXT_SEGMENTS | CONTEXT_DEBUG_REGISTERS \
182 | CONTEXT_EXTENDED_REGISTERS
184 static uintptr_t dr[8];
185 static int debug_registers_changed;
186 static int debug_registers_used;
188 static int windows_initialization_done;
189 #define DR6_CLEAR_VALUE 0xffff0ff0
191 /* The exception thrown by a program to tell the debugger the name of
192 a thread. The exception record contains an ID of a thread and a
193 name to give it. This exception has no documented name, but MSDN
194 dubs it "MS_VC_EXCEPTION" in one code example. */
195 #define MS_VC_EXCEPTION 0x406d1388
199 HANDLE_EXCEPTION_UNHANDLED = 0,
200 HANDLE_EXCEPTION_HANDLED,
201 HANDLE_EXCEPTION_IGNORED
202 } handle_exception_result;
204 /* The string sent by cygwin when it processes a signal.
205 FIXME: This should be in a cygwin include file. */
206 #ifndef _CYGWIN_SIGNAL_STRING
207 #define _CYGWIN_SIGNAL_STRING "cYgSiGw00f"
210 #define CHECK(x) check (x, __FILE__,__LINE__)
211 #define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x
212 #define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x
213 #define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x
214 #define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x
216 static void cygwin_set_dr (int i, CORE_ADDR addr);
217 static void cygwin_set_dr7 (unsigned long val);
218 static CORE_ADDR cygwin_get_dr (int i);
219 static unsigned long cygwin_get_dr6 (void);
220 static unsigned long cygwin_get_dr7 (void);
222 static enum gdb_signal last_sig = GDB_SIGNAL_0;
223 /* Set if a signal was received from the debugged process. */
225 /* Thread information structure used to track information that is
226 not available in gdb's thread structure. */
227 typedef struct windows_thread_info_struct
229 struct windows_thread_info_struct *next;
232 CORE_ADDR thread_local_base;
241 static windows_thread_info thread_head;
243 /* The process and thread handles for the above context. */
245 static DEBUG_EVENT current_event; /* The current debug event from
247 static HANDLE current_process_handle; /* Currently executing process */
248 static windows_thread_info *current_thread; /* Info on currently selected thread */
249 static DWORD main_thread_id; /* Thread ID of the main thread */
251 /* Counts of things. */
252 static int exception_count = 0;
253 static int event_count = 0;
254 static int saw_create;
255 static int open_process_used = 0;
258 static int new_console = 0;
260 static int cygwin_exceptions = 0;
262 static int new_group = 1;
263 static int debug_exec = 0; /* show execution */
264 static int debug_events = 0; /* show events from kernel */
265 static int debug_memory = 0; /* show target memory accesses */
266 static int debug_exceptions = 0; /* show target exceptions */
267 static int useshell = 0; /* use shell for subprocesses */
269 /* This vector maps GDB's idea of a register's number into an offset
270 in the windows exception context vector.
272 It also contains the bit mask needed to load the register in question.
274 The contents of this table can only be computed by the units
275 that provide CPU-specific support for Windows native debugging.
276 These units should set the table by calling
277 windows_set_context_register_offsets.
279 One day we could read a reg, we could inspect the context we
280 already have loaded, if it doesn't have the bit set that we need,
281 we read that set of registers in using GetThreadContext. If the
282 context already contains what we need, we just unpack it. Then to
283 write a register, first we have to ensure that the context contains
284 the other regs of the group, and then we copy the info in and set
287 static const int *mappings;
289 /* The function to use in order to determine whether a register is
290 a segment register or not. */
291 static segment_register_p_ftype *segment_register_p;
293 /* See windows_nat_target::resume to understand why this is commented
296 /* This vector maps the target's idea of an exception (extracted
297 from the DEBUG_EVENT structure) to GDB's idea. */
299 struct xlate_exception
305 static const struct xlate_exception xlate[] =
307 {EXCEPTION_ACCESS_VIOLATION, GDB_SIGNAL_SEGV},
308 {STATUS_STACK_OVERFLOW, GDB_SIGNAL_SEGV},
309 {EXCEPTION_BREAKPOINT, GDB_SIGNAL_TRAP},
310 {DBG_CONTROL_C, GDB_SIGNAL_INT},
311 {EXCEPTION_SINGLE_STEP, GDB_SIGNAL_TRAP},
312 {STATUS_FLOAT_DIVIDE_BY_ZERO, GDB_SIGNAL_FPE}
317 struct windows_nat_target final : public x86_nat_target<inf_child_target>
319 void close () override;
321 void attach (const char *, int) override;
323 bool attach_no_wait () override
326 void detach (inferior *, int) override;
328 void resume (ptid_t, int , enum gdb_signal) override;
330 ptid_t wait (ptid_t, struct target_waitstatus *, int) override;
332 void fetch_registers (struct regcache *, int) override;
333 void store_registers (struct regcache *, int) override;
335 enum target_xfer_status xfer_partial (enum target_object object,
338 const gdb_byte *writebuf,
339 ULONGEST offset, ULONGEST len,
340 ULONGEST *xfered_len) override;
342 void files_info () override;
344 void kill () override;
346 void create_inferior (const char *, const std::string &,
347 char **, int) override;
349 void mourn_inferior () override;
351 bool thread_alive (ptid_t ptid) override;
353 const char *pid_to_str (ptid_t) override;
355 void interrupt () override;
357 char *pid_to_exec_file (int pid) override;
359 ptid_t get_ada_task_ptid (long lwp, long thread) override;
361 bool get_tib_address (ptid_t ptid, CORE_ADDR *addr) override;
363 const char *thread_name (struct thread_info *) override;
366 static windows_nat_target the_windows_nat_target;
368 /* Set the MAPPINGS static global to OFFSETS.
369 See the description of MAPPINGS for more details. */
372 windows_set_context_register_offsets (const int *offsets)
377 /* See windows-nat.h. */
380 windows_set_segment_register_p (segment_register_p_ftype *fun)
382 segment_register_p = fun;
386 check (BOOL ok, const char *file, int line)
389 printf_filtered ("error return %s:%d was %u\n", file, line,
390 (unsigned) GetLastError ());
393 /* Find a thread record given a thread id. If GET_CONTEXT is not 0,
394 then also retrieve the context for this thread. If GET_CONTEXT is
395 negative, then don't suspend the thread. */
396 static windows_thread_info *
397 thread_rec (DWORD id, int get_context)
399 windows_thread_info *th;
401 for (th = &thread_head; (th = th->next) != NULL;)
404 if (!th->suspended && get_context)
406 if (get_context > 0 && id != current_event.dwThreadId)
408 if (SuspendThread (th->h) == (DWORD) -1)
410 DWORD err = GetLastError ();
412 /* We get Access Denied (5) when trying to suspend
413 threads that Windows started on behalf of the
414 debuggee, usually when those threads are just
416 We can get Invalid Handle (6) if the main thread
418 if (err != ERROR_INVALID_HANDLE
419 && err != ERROR_ACCESS_DENIED)
420 warning (_("SuspendThread (tid=0x%x) failed."
422 (unsigned) id, (unsigned) err);
428 else if (get_context < 0)
430 th->reload_context = 1;
438 /* Add a thread to the thread list.
440 PTID is the ptid of the thread to be added.
441 H is its Windows handle.
442 TLB is its thread local base.
443 MAIN_THREAD_P should be true if the thread to be added is
444 the main thread, false otherwise. */
446 static windows_thread_info *
447 windows_add_thread (ptid_t ptid, HANDLE h, void *tlb, bool main_thread_p)
449 windows_thread_info *th;
452 gdb_assert (ptid.tid () != 0);
456 if ((th = thread_rec (id, FALSE)))
459 th = XCNEW (windows_thread_info);
462 th->thread_local_base = (CORE_ADDR) (uintptr_t) tlb;
463 th->next = thread_head.next;
464 thread_head.next = th;
466 /* Add this new thread to the list of threads.
468 To be consistent with what's done on other platforms, we add
469 the main thread silently (in reality, this thread is really
470 more of a process to the user than a thread). */
472 add_thread_silent (ptid);
476 /* Set the debug registers for the new thread if they are used. */
477 if (debug_registers_used)
479 /* Only change the value of the debug registers. */
480 th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS;
481 CHECK (GetThreadContext (th->h, &th->context));
482 th->context.Dr0 = dr[0];
483 th->context.Dr1 = dr[1];
484 th->context.Dr2 = dr[2];
485 th->context.Dr3 = dr[3];
486 th->context.Dr6 = DR6_CLEAR_VALUE;
487 th->context.Dr7 = dr[7];
488 CHECK (SetThreadContext (th->h, &th->context));
489 th->context.ContextFlags = 0;
494 /* Clear out any old thread list and reinitialize it to a
497 windows_init_thread_list (void)
499 windows_thread_info *th = &thread_head;
501 DEBUG_EVENTS (("gdb: windows_init_thread_list\n"));
503 while (th->next != NULL)
505 windows_thread_info *here = th->next;
506 th->next = here->next;
509 thread_head.next = NULL;
512 /* Delete a thread from the list of threads.
514 PTID is the ptid of the thread to be deleted.
515 EXIT_CODE is the thread's exit code.
516 MAIN_THREAD_P should be true if the thread to be deleted is
517 the main thread, false otherwise. */
520 windows_delete_thread (ptid_t ptid, DWORD exit_code, bool main_thread_p)
522 windows_thread_info *th;
525 gdb_assert (ptid.tid () != 0);
529 /* Emit a notification about the thread being deleted.
531 Note that no notification was printed when the main thread
532 was created, and thus, unless in verbose mode, we should be
533 symetrical, and avoid that notification for the main thread
537 printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (ptid));
538 else if (print_thread_events && !main_thread_p)
539 printf_unfiltered (_("[%s exited with code %u]\n"),
540 target_pid_to_str (ptid), (unsigned) exit_code);
542 delete_thread (find_thread_ptid (ptid));
544 for (th = &thread_head;
545 th->next != NULL && th->next->id != id;
549 if (th->next != NULL)
551 windows_thread_info *here = th->next;
552 th->next = here->next;
558 /* Fetches register number R from the given windows_thread_info,
559 and supplies its value to the given regcache.
561 This function assumes that R is non-negative. A failed assertion
562 is raised if that is not true.
564 This function assumes that TH->RELOAD_CONTEXT is not set, meaning
565 that the windows_thread_info has an up-to-date context. A failed
566 assertion is raised if that assumption is violated. */
569 windows_fetch_one_register (struct regcache *regcache,
570 windows_thread_info *th, int r)
573 gdb_assert (!th->reload_context);
575 char *context_offset = ((char *) &th->context) + mappings[r];
576 struct gdbarch *gdbarch = regcache->arch ();
577 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
579 if (r == I387_FISEG_REGNUM (tdep))
581 long l = *((long *) context_offset) & 0xffff;
582 regcache->raw_supply (r, (char *) &l);
584 else if (r == I387_FOP_REGNUM (tdep))
586 long l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1);
587 regcache->raw_supply (r, (char *) &l);
589 else if (segment_register_p (r))
591 /* GDB treats segment registers as 32bit registers, but they are
592 in fact only 16 bits long. Make sure we do not read extra
593 bits from our source buffer. */
594 long l = *((long *) context_offset) & 0xffff;
595 regcache->raw_supply (r, (char *) &l);
598 regcache->raw_supply (r, context_offset);
602 windows_nat_target::fetch_registers (struct regcache *regcache, int r)
604 DWORD pid = regcache->ptid ().tid ();
605 windows_thread_info *th = thread_rec (pid, TRUE);
607 /* Check if TH exists. Windows sometimes uses a non-existent
608 thread id in its events. */
612 if (th->reload_context)
615 if (have_saved_context)
617 /* Lie about where the program actually is stopped since
618 cygwin has informed us that we should consider the signal
619 to have occurred at another location which is stored in
621 memcpy (&th->context, &saved_context,
622 __COPY_CONTEXT_SIZE);
623 have_saved_context = 0;
628 th->context.ContextFlags = CONTEXT_DEBUGGER_DR;
629 CHECK (GetThreadContext (th->h, &th->context));
630 /* Copy dr values from that thread.
631 But only if there were not modified since last stop.
633 if (!debug_registers_changed)
635 dr[0] = th->context.Dr0;
636 dr[1] = th->context.Dr1;
637 dr[2] = th->context.Dr2;
638 dr[3] = th->context.Dr3;
639 dr[6] = th->context.Dr6;
640 dr[7] = th->context.Dr7;
643 th->reload_context = 0;
647 for (r = 0; r < gdbarch_num_regs (regcache->arch()); r++)
648 windows_fetch_one_register (regcache, th, r);
650 windows_fetch_one_register (regcache, th, r);
653 /* Collect the register number R from the given regcache, and store
654 its value into the corresponding area of the given thread's context.
656 This function assumes that R is non-negative. A failed assertion
657 assertion is raised if that is not true. */
660 windows_store_one_register (const struct regcache *regcache,
661 windows_thread_info *th, int r)
665 regcache->raw_collect (r, ((char *) &th->context) + mappings[r]);
668 /* Store a new register value into the context of the thread tied to
672 windows_nat_target::store_registers (struct regcache *regcache, int r)
674 DWORD pid = regcache->ptid ().tid ();
675 windows_thread_info *th = thread_rec (pid, TRUE);
677 /* Check if TH exists. Windows sometimes uses a non-existent
678 thread id in its events. */
683 for (r = 0; r < gdbarch_num_regs (regcache->arch ()); r++)
684 windows_store_one_register (regcache, th, r);
686 windows_store_one_register (regcache, th, r);
689 /* Encapsulate the information required in a call to
690 symbol_file_add_args. */
691 struct safe_symbol_file_add_args
695 section_addr_info *addrs;
698 struct ui_file *err, *out;
702 /* Maintain a linked list of "so" information. */
703 struct lm_info_windows : public lm_info_base
705 LPVOID load_addr = 0;
708 static struct so_list solib_start, *solib_end;
710 static struct so_list *
711 windows_make_so (const char *name, LPVOID load_addr)
718 WIN32_FIND_DATA w32_fd;
719 HANDLE h = FindFirstFile(name, &w32_fd);
721 if (h == INVALID_HANDLE_VALUE)
727 if (GetCurrentDirectory (MAX_PATH + 1, cwd))
729 p = strrchr (buf, '\\');
732 SetCurrentDirectory (buf);
733 GetFullPathName (w32_fd.cFileName, MAX_PATH, buf, &p);
734 SetCurrentDirectory (cwd);
737 if (strcasecmp (buf, "ntdll.dll") == 0)
739 GetSystemDirectory (buf, sizeof (buf));
740 strcat (buf, "\\ntdll.dll");
743 cygwin_buf_t buf[__PMAX];
746 if (access (name, F_OK) != 0)
748 if (strcasecmp (name, "ntdll.dll") == 0)
751 GetSystemDirectoryW (buf, sizeof (buf) / sizeof (wchar_t));
752 wcscat (buf, L"\\ntdll.dll");
756 GetSystemDirectoryA (buf, sizeof (buf) / sizeof (wchar_t));
757 strcat (buf, "\\ntdll.dll");
762 so = XCNEW (struct so_list);
763 lm_info_windows *li = new lm_info_windows;
765 li->load_addr = load_addr;
766 strcpy (so->so_original_name, name);
768 strcpy (so->so_name, buf);
771 cygwin_conv_path (CCP_WIN_W_TO_POSIX, buf, so->so_name,
772 SO_NAME_MAX_PATH_SIZE);
775 char *rname = realpath (name, NULL);
776 if (rname && strlen (rname) < SO_NAME_MAX_PATH_SIZE)
778 strcpy (so->so_name, rname);
782 error (_("dll path too long"));
784 /* Record cygwin1.dll .text start/end. */
785 p = strchr (so->so_name, '\0') - (sizeof ("/cygwin1.dll") - 1);
786 if (p >= so->so_name && strcasecmp (p, "/cygwin1.dll") == 0)
788 asection *text = NULL;
791 gdb_bfd_ref_ptr abfd (gdb_bfd_open (so->so_name, "pei-i386", -1));
796 if (bfd_check_format (abfd.get (), bfd_object))
797 text = bfd_get_section_by_name (abfd.get (), ".text");
802 /* The symbols in a dll are offset by 0x1000, which is the
803 offset from 0 of the first byte in an image - because of the
804 file header and the section alignment. */
805 cygwin_load_start = (CORE_ADDR) (uintptr_t) ((char *)
807 cygwin_load_end = cygwin_load_start + bfd_section_size (abfd.get (),
816 get_image_name (HANDLE h, void *address, int unicode)
819 static char buf[__PMAX];
821 static char buf[(2 * __PMAX) + 1];
823 DWORD size = unicode ? sizeof (WCHAR) : sizeof (char);
829 /* Attempt to read the name of the dll that was detected.
830 This is documented to work only when actively debugging
831 a program. It will not work for attached processes. */
835 /* See if we could read the address of a string, and that the
836 address isn't null. */
837 if (!ReadProcessMemory (h, address, &address_ptr,
838 sizeof (address_ptr), &done)
839 || done != sizeof (address_ptr) || !address_ptr)
842 /* Find the length of the string. */
843 while (ReadProcessMemory (h, address_ptr + len++ * size, &b, size, &done)
844 && (b[0] != 0 || b[size - 1] != 0) && done == size)
848 ReadProcessMemory (h, address_ptr, buf, len, &done);
851 WCHAR *unicode_address = (WCHAR *) alloca (len * sizeof (WCHAR));
852 ReadProcessMemory (h, address_ptr, unicode_address, len * sizeof (WCHAR),
855 wcstombs (buf, unicode_address, __PMAX);
857 WideCharToMultiByte (CP_ACP, 0, unicode_address, len, buf, sizeof buf,
865 /* Handle a DLL load event, and return 1.
867 This function assumes that this event did not occur during inferior
868 initialization, where their event info may be incomplete (see
869 do_initial_windows_stuff and windows_add_all_dlls for more info
870 on how we handle DLL loading during that phase). */
875 LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll;
878 /* Try getting the DLL name via the lpImageName field of the event.
879 Note that Microsoft documents this fields as strictly optional,
880 in the sense that it might be NULL. And the first DLL event in
881 particular is explicitly documented as "likely not pass[ed]"
882 (source: MSDN LOAD_DLL_DEBUG_INFO structure). */
883 dll_name = get_image_name (current_process_handle,
884 event->lpImageName, event->fUnicode);
888 solib_end->next = windows_make_so (dll_name, event->lpBaseOfDll);
889 solib_end = solib_end->next;
891 lm_info_windows *li = (lm_info_windows *) solib_end->lm_info;
893 DEBUG_EVENTS (("gdb: Loading dll \"%s\" at %s.\n", solib_end->so_name,
894 host_address_to_string (li->load_addr)));
898 windows_free_so (struct so_list *so)
900 lm_info_windows *li = (lm_info_windows *) so->lm_info;
906 /* Handle a DLL unload event.
907 Return 1 if successful, or zero otherwise.
909 This function assumes that this event did not occur during inferior
910 initialization, where their event info may be incomplete (see
911 do_initial_windows_stuff and windows_add_all_dlls for more info
912 on how we handle DLL loading during that phase). */
917 LPVOID lpBaseOfDll = current_event.u.UnloadDll.lpBaseOfDll;
920 for (so = &solib_start; so->next != NULL; so = so->next)
922 lm_info_windows *li_next = (lm_info_windows *) so->next->lm_info;
924 if (li_next->load_addr == lpBaseOfDll)
926 struct so_list *sodel = so->next;
928 so->next = sodel->next;
931 DEBUG_EVENTS (("gdb: Unloading dll \"%s\".\n", sodel->so_name));
933 windows_free_so (sodel);
938 /* We did not find any DLL that was previously loaded at this address,
939 so register a complaint. We do not report an error, because we have
940 observed that this may be happening under some circumstances. For
941 instance, running 32bit applications on x64 Windows causes us to receive
942 4 mysterious UNLOAD_DLL_DEBUG_EVENTs during the startup phase (these
943 events are apparently caused by the WOW layer, the interface between
944 32bit and 64bit worlds). */
945 complaint (_("dll starting at %s not found."),
946 host_address_to_string (lpBaseOfDll));
949 /* Call FUNC wrapped in a TRY/CATCH that swallows all GDB
953 catch_errors (void (*func) ())
959 CATCH (ex, RETURN_MASK_ALL)
961 exception_print (gdb_stderr, ex);
966 /* Clear list of loaded DLLs. */
968 windows_clear_solib (void)
970 solib_start.next = NULL;
971 solib_end = &solib_start;
975 signal_event_command (const char *args, int from_tty)
977 uintptr_t event_id = 0;
978 char *endargs = NULL;
981 error (_("signal-event requires an argument (integer event id)"));
983 event_id = strtoumax (args, &endargs, 10);
985 if ((errno == ERANGE) || (event_id == 0) || (event_id > UINTPTR_MAX) ||
986 ((HANDLE) event_id == INVALID_HANDLE_VALUE))
987 error (_("Failed to convert `%s' to event id"), args);
989 SetEvent ((HANDLE) event_id);
990 CloseHandle ((HANDLE) event_id);
993 /* Handle DEBUG_STRING output from child process.
994 Cygwin prepends its messages with a "cygwin:". Interpret this as
995 a Cygwin signal. Otherwise just print the string as a warning. */
997 handle_output_debug_string (struct target_waitstatus *ourstatus)
999 gdb::unique_xmalloc_ptr<char> s;
1002 if (!target_read_string
1003 ((CORE_ADDR) (uintptr_t) current_event.u.DebugString.lpDebugStringData,
1005 || !s || !*(s.get ()))
1006 /* nothing to do */;
1007 else if (!startswith (s.get (), _CYGWIN_SIGNAL_STRING))
1010 if (!startswith (s.get (), "cYg"))
1013 char *p = strchr (s.get (), '\0');
1015 if (p > s.get () && *--p == '\n')
1017 warning (("%s"), s.get ());
1023 /* Got a cygwin signal marker. A cygwin signal is followed by
1024 the signal number itself and then optionally followed by the
1025 thread id and address to saved context within the DLL. If
1026 these are supplied, then the given thread is assumed to have
1027 issued the signal and the context from the thread is assumed
1028 to be stored at the given address in the inferior. Tell gdb
1029 to treat this like a real signal. */
1031 int sig = strtol (s.get () + sizeof (_CYGWIN_SIGNAL_STRING) - 1, &p, 0);
1032 gdb_signal gotasig = gdb_signal_from_host (sig);
1034 ourstatus->value.sig = gotasig;
1040 ourstatus->kind = TARGET_WAITKIND_STOPPED;
1041 retval = strtoul (p, &p, 0);
1043 retval = main_thread_id;
1044 else if ((x = (LPCVOID) (uintptr_t) strtoull (p, NULL, 0))
1045 && ReadProcessMemory (current_process_handle, x,
1047 __COPY_CONTEXT_SIZE, &n)
1048 && n == __COPY_CONTEXT_SIZE)
1049 have_saved_context = 1;
1058 display_selector (HANDLE thread, DWORD sel)
1061 if (GetThreadSelectorEntry (thread, sel, &info))
1064 printf_filtered ("0x%03x: ", (unsigned) sel);
1065 if (!info.HighWord.Bits.Pres)
1067 puts_filtered ("Segment not present\n");
1070 base = (info.HighWord.Bits.BaseHi << 24) +
1071 (info.HighWord.Bits.BaseMid << 16)
1073 limit = (info.HighWord.Bits.LimitHi << 16) + info.LimitLow;
1074 if (info.HighWord.Bits.Granularity)
1075 limit = (limit << 12) | 0xfff;
1076 printf_filtered ("base=0x%08x limit=0x%08x", base, limit);
1077 if (info.HighWord.Bits.Default_Big)
1078 puts_filtered(" 32-bit ");
1080 puts_filtered(" 16-bit ");
1081 switch ((info.HighWord.Bits.Type & 0xf) >> 1)
1084 puts_filtered ("Data (Read-Only, Exp-up");
1087 puts_filtered ("Data (Read/Write, Exp-up");
1090 puts_filtered ("Unused segment (");
1093 puts_filtered ("Data (Read/Write, Exp-down");
1096 puts_filtered ("Code (Exec-Only, N.Conf");
1099 puts_filtered ("Code (Exec/Read, N.Conf");
1102 puts_filtered ("Code (Exec-Only, Conf");
1105 puts_filtered ("Code (Exec/Read, Conf");
1108 printf_filtered ("Unknown type 0x%x",info.HighWord.Bits.Type);
1110 if ((info.HighWord.Bits.Type & 0x1) == 0)
1111 puts_filtered(", N.Acc");
1112 puts_filtered (")\n");
1113 if ((info.HighWord.Bits.Type & 0x10) == 0)
1114 puts_filtered("System selector ");
1115 printf_filtered ("Priviledge level = %d. ", info.HighWord.Bits.Dpl);
1116 if (info.HighWord.Bits.Granularity)
1117 puts_filtered ("Page granular.\n");
1119 puts_filtered ("Byte granular.\n");
1124 DWORD err = GetLastError ();
1125 if (err == ERROR_NOT_SUPPORTED)
1126 printf_filtered ("Function not supported\n");
1128 printf_filtered ("Invalid selector 0x%x.\n", (unsigned) sel);
1134 display_selectors (const char * args, int from_tty)
1136 if (!current_thread)
1138 puts_filtered ("Impossible to display selectors now.\n");
1144 puts_filtered ("Selector $cs\n");
1145 display_selector (current_thread->h,
1146 current_thread->context.SegCs);
1147 puts_filtered ("Selector $ds\n");
1148 display_selector (current_thread->h,
1149 current_thread->context.SegDs);
1150 puts_filtered ("Selector $es\n");
1151 display_selector (current_thread->h,
1152 current_thread->context.SegEs);
1153 puts_filtered ("Selector $ss\n");
1154 display_selector (current_thread->h,
1155 current_thread->context.SegSs);
1156 puts_filtered ("Selector $fs\n");
1157 display_selector (current_thread->h,
1158 current_thread->context.SegFs);
1159 puts_filtered ("Selector $gs\n");
1160 display_selector (current_thread->h,
1161 current_thread->context.SegGs);
1166 sel = parse_and_eval_long (args);
1167 printf_filtered ("Selector \"%s\"\n",args);
1168 display_selector (current_thread->h, sel);
1172 #define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \
1173 printf_unfiltered ("gdb: Target exception %s at %s\n", x, \
1174 host_address_to_string (\
1175 current_event.u.Exception.ExceptionRecord.ExceptionAddress))
1177 static handle_exception_result
1178 handle_exception (struct target_waitstatus *ourstatus)
1180 EXCEPTION_RECORD *rec = ¤t_event.u.Exception.ExceptionRecord;
1181 DWORD code = rec->ExceptionCode;
1182 handle_exception_result result = HANDLE_EXCEPTION_HANDLED;
1184 ourstatus->kind = TARGET_WAITKIND_STOPPED;
1186 /* Record the context of the current thread. */
1187 thread_rec (current_event.dwThreadId, -1);
1191 case EXCEPTION_ACCESS_VIOLATION:
1192 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION");
1193 ourstatus->value.sig = GDB_SIGNAL_SEGV;
1196 /* See if the access violation happened within the cygwin DLL
1197 itself. Cygwin uses a kind of exception handling to deal
1198 with passed-in invalid addresses. gdb should not treat
1199 these as real SEGVs since they will be silently handled by
1200 cygwin. A real SEGV will (theoretically) be caught by
1201 cygwin later in the process and will be sent as a
1202 cygwin-specific-signal. So, ignore SEGVs if they show up
1203 within the text segment of the DLL itself. */
1205 CORE_ADDR addr = (CORE_ADDR) (uintptr_t) rec->ExceptionAddress;
1207 if ((!cygwin_exceptions && (addr >= cygwin_load_start
1208 && addr < cygwin_load_end))
1209 || (find_pc_partial_function (addr, &fn, NULL, NULL)
1210 && startswith (fn, "KERNEL32!IsBad")))
1211 return HANDLE_EXCEPTION_UNHANDLED;
1215 case STATUS_STACK_OVERFLOW:
1216 DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW");
1217 ourstatus->value.sig = GDB_SIGNAL_SEGV;
1219 case STATUS_FLOAT_DENORMAL_OPERAND:
1220 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND");
1221 ourstatus->value.sig = GDB_SIGNAL_FPE;
1223 case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
1224 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED");
1225 ourstatus->value.sig = GDB_SIGNAL_FPE;
1227 case STATUS_FLOAT_INEXACT_RESULT:
1228 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT");
1229 ourstatus->value.sig = GDB_SIGNAL_FPE;
1231 case STATUS_FLOAT_INVALID_OPERATION:
1232 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION");
1233 ourstatus->value.sig = GDB_SIGNAL_FPE;
1235 case STATUS_FLOAT_OVERFLOW:
1236 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW");
1237 ourstatus->value.sig = GDB_SIGNAL_FPE;
1239 case STATUS_FLOAT_STACK_CHECK:
1240 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK");
1241 ourstatus->value.sig = GDB_SIGNAL_FPE;
1243 case STATUS_FLOAT_UNDERFLOW:
1244 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW");
1245 ourstatus->value.sig = GDB_SIGNAL_FPE;
1247 case STATUS_FLOAT_DIVIDE_BY_ZERO:
1248 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO");
1249 ourstatus->value.sig = GDB_SIGNAL_FPE;
1251 case STATUS_INTEGER_DIVIDE_BY_ZERO:
1252 DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO");
1253 ourstatus->value.sig = GDB_SIGNAL_FPE;
1255 case STATUS_INTEGER_OVERFLOW:
1256 DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW");
1257 ourstatus->value.sig = GDB_SIGNAL_FPE;
1259 case EXCEPTION_BREAKPOINT:
1260 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT");
1261 ourstatus->value.sig = GDB_SIGNAL_TRAP;
1264 DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C");
1265 ourstatus->value.sig = GDB_SIGNAL_INT;
1267 case DBG_CONTROL_BREAK:
1268 DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK");
1269 ourstatus->value.sig = GDB_SIGNAL_INT;
1271 case EXCEPTION_SINGLE_STEP:
1272 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP");
1273 ourstatus->value.sig = GDB_SIGNAL_TRAP;
1275 case EXCEPTION_ILLEGAL_INSTRUCTION:
1276 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION");
1277 ourstatus->value.sig = GDB_SIGNAL_ILL;
1279 case EXCEPTION_PRIV_INSTRUCTION:
1280 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION");
1281 ourstatus->value.sig = GDB_SIGNAL_ILL;
1283 case EXCEPTION_NONCONTINUABLE_EXCEPTION:
1284 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION");
1285 ourstatus->value.sig = GDB_SIGNAL_ILL;
1287 case MS_VC_EXCEPTION:
1288 if (rec->NumberParameters >= 3
1289 && (rec->ExceptionInformation[0] & 0xffffffff) == 0x1000)
1291 DWORD named_thread_id;
1292 windows_thread_info *named_thread;
1293 CORE_ADDR thread_name_target;
1295 DEBUG_EXCEPTION_SIMPLE ("MS_VC_EXCEPTION");
1297 thread_name_target = rec->ExceptionInformation[1];
1298 named_thread_id = (DWORD) (0xffffffff & rec->ExceptionInformation[2]);
1300 if (named_thread_id == (DWORD) -1)
1301 named_thread_id = current_event.dwThreadId;
1303 named_thread = thread_rec (named_thread_id, 0);
1304 if (named_thread != NULL)
1306 int thread_name_len;
1307 gdb::unique_xmalloc_ptr<char> thread_name;
1309 thread_name_len = target_read_string (thread_name_target,
1310 &thread_name, 1025, NULL);
1311 if (thread_name_len > 0)
1313 thread_name.get ()[thread_name_len - 1] = '\0';
1314 xfree (named_thread->name);
1315 named_thread->name = thread_name.release ();
1318 ourstatus->value.sig = GDB_SIGNAL_TRAP;
1319 result = HANDLE_EXCEPTION_IGNORED;
1322 /* treat improperly formed exception as unknown */
1325 /* Treat unhandled first chance exceptions specially. */
1326 if (current_event.u.Exception.dwFirstChance)
1327 return HANDLE_EXCEPTION_UNHANDLED;
1328 printf_unfiltered ("gdb: unknown target exception 0x%08x at %s\n",
1329 (unsigned) current_event.u.Exception.ExceptionRecord.ExceptionCode,
1330 host_address_to_string (
1331 current_event.u.Exception.ExceptionRecord.ExceptionAddress));
1332 ourstatus->value.sig = GDB_SIGNAL_UNKNOWN;
1336 last_sig = ourstatus->value.sig;
1340 /* Resume thread specified by ID, or all artificially suspended
1341 threads, if we are continuing execution. KILLED non-zero means we
1342 have killed the inferior, so we should ignore weird errors due to
1343 threads shutting down. */
1345 windows_continue (DWORD continue_status, int id, int killed)
1347 windows_thread_info *th;
1350 DEBUG_EVENTS (("ContinueDebugEvent (cpid=%d, ctid=0x%x, %s);\n",
1351 (unsigned) current_event.dwProcessId,
1352 (unsigned) current_event.dwThreadId,
1353 continue_status == DBG_CONTINUE ?
1354 "DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED"));
1356 for (th = &thread_head; (th = th->next) != NULL;)
1357 if ((id == -1 || id == (int) th->id)
1360 if (debug_registers_changed)
1362 th->context.ContextFlags |= CONTEXT_DEBUG_REGISTERS;
1363 th->context.Dr0 = dr[0];
1364 th->context.Dr1 = dr[1];
1365 th->context.Dr2 = dr[2];
1366 th->context.Dr3 = dr[3];
1367 th->context.Dr6 = DR6_CLEAR_VALUE;
1368 th->context.Dr7 = dr[7];
1370 if (th->context.ContextFlags)
1374 if (GetExitCodeThread (th->h, &ec)
1375 && ec == STILL_ACTIVE)
1377 BOOL status = SetThreadContext (th->h, &th->context);
1382 th->context.ContextFlags = 0;
1384 if (th->suspended > 0)
1385 (void) ResumeThread (th->h);
1389 res = ContinueDebugEvent (current_event.dwProcessId,
1390 current_event.dwThreadId,
1394 error (_("Failed to resume program execution"
1395 " (ContinueDebugEvent failed, error %u)"),
1396 (unsigned int) GetLastError ());
1398 debug_registers_changed = 0;
1402 /* Called in pathological case where Windows fails to send a
1403 CREATE_PROCESS_DEBUG_EVENT after an attach. */
1405 fake_create_process (void)
1407 current_process_handle = OpenProcess (PROCESS_ALL_ACCESS, FALSE,
1408 current_event.dwProcessId);
1409 if (current_process_handle != NULL)
1410 open_process_used = 1;
1413 error (_("OpenProcess call failed, GetLastError = %u"),
1414 (unsigned) GetLastError ());
1415 /* We can not debug anything in that case. */
1417 main_thread_id = current_event.dwThreadId;
1419 = windows_add_thread (ptid_t (current_event.dwProcessId, 0,
1420 current_event.dwThreadId),
1421 current_event.u.CreateThread.hThread,
1422 current_event.u.CreateThread.lpThreadLocalBase,
1423 true /* main_thread_p */);
1424 return main_thread_id;
1428 windows_nat_target::resume (ptid_t ptid, int step, enum gdb_signal sig)
1430 windows_thread_info *th;
1431 DWORD continue_status = DBG_CONTINUE;
1433 /* A specific PTID means `step only this thread id'. */
1434 int resume_all = ptid == minus_one_ptid;
1436 /* If we're continuing all threads, it's the current inferior that
1437 should be handled specially. */
1439 ptid = inferior_ptid;
1441 if (sig != GDB_SIGNAL_0)
1443 if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT)
1445 DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig));
1447 else if (sig == last_sig)
1448 continue_status = DBG_EXCEPTION_NOT_HANDLED;
1451 /* This code does not seem to work, because
1452 the kernel does probably not consider changes in the ExceptionRecord
1453 structure when passing the exception to the inferior.
1454 Note that this seems possible in the exception handler itself. */
1456 for (const xlate_exception &x : xlate)
1459 current_event.u.Exception.ExceptionRecord.ExceptionCode
1461 continue_status = DBG_EXCEPTION_NOT_HANDLED;
1464 if (continue_status == DBG_CONTINUE)
1466 DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig));
1470 DEBUG_EXCEPT(("Can only continue with received signal %d.\n",
1474 last_sig = GDB_SIGNAL_0;
1476 DEBUG_EXEC (("gdb: windows_resume (pid=%d, tid=%ld, step=%d, sig=%d);\n",
1477 ptid.pid (), ptid.tid (), step, sig));
1479 /* Get context for currently selected thread. */
1480 th = thread_rec (inferior_ptid.tid (), FALSE);
1485 /* Single step by setting t bit. */
1486 struct regcache *regcache = get_current_regcache ();
1487 struct gdbarch *gdbarch = regcache->arch ();
1488 fetch_registers (regcache, gdbarch_ps_regnum (gdbarch));
1489 th->context.EFlags |= FLAG_TRACE_BIT;
1492 if (th->context.ContextFlags)
1494 if (debug_registers_changed)
1496 th->context.Dr0 = dr[0];
1497 th->context.Dr1 = dr[1];
1498 th->context.Dr2 = dr[2];
1499 th->context.Dr3 = dr[3];
1500 th->context.Dr6 = DR6_CLEAR_VALUE;
1501 th->context.Dr7 = dr[7];
1503 CHECK (SetThreadContext (th->h, &th->context));
1504 th->context.ContextFlags = 0;
1508 /* Allow continuing with the same signal that interrupted us.
1509 Otherwise complain. */
1512 windows_continue (continue_status, -1, 0);
1514 windows_continue (continue_status, ptid.tid (), 0);
1517 /* Ctrl-C handler used when the inferior is not run in the same console. The
1518 handler is in charge of interrupting the inferior using DebugBreakProcess.
1519 Note that this function is not available prior to Windows XP. In this case
1520 we emit a warning. */
1522 ctrl_c_handler (DWORD event_type)
1524 const int attach_flag = current_inferior ()->attach_flag;
1526 /* Only handle Ctrl-C and Ctrl-Break events. Ignore others. */
1527 if (event_type != CTRL_C_EVENT && event_type != CTRL_BREAK_EVENT)
1530 /* If the inferior and the debugger share the same console, do nothing as
1531 the inferior has also received the Ctrl-C event. */
1532 if (!new_console && !attach_flag)
1535 if (!DebugBreakProcess (current_process_handle))
1536 warning (_("Could not interrupt program. "
1537 "Press Ctrl-c in the program console."));
1539 /* Return true to tell that Ctrl-C has been handled. */
1543 /* Get the next event from the child. Returns a non-zero thread id if the event
1544 requires handling by WFI (or whatever). */
1546 get_windows_debug_event (struct target_ops *ops,
1547 int pid, struct target_waitstatus *ourstatus)
1550 DWORD continue_status, event_code;
1551 windows_thread_info *th;
1552 static windows_thread_info dummy_thread_info;
1553 DWORD thread_id = 0;
1555 last_sig = GDB_SIGNAL_0;
1557 if (!(debug_event = WaitForDebugEvent (¤t_event, 1000)))
1561 continue_status = DBG_CONTINUE;
1563 event_code = current_event.dwDebugEventCode;
1564 ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
1566 have_saved_context = 0;
1570 case CREATE_THREAD_DEBUG_EVENT:
1571 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1572 (unsigned) current_event.dwProcessId,
1573 (unsigned) current_event.dwThreadId,
1574 "CREATE_THREAD_DEBUG_EVENT"));
1575 if (saw_create != 1)
1577 struct inferior *inf;
1578 inf = find_inferior_pid (current_event.dwProcessId);
1579 if (!saw_create && inf->attach_flag)
1581 /* Kludge around a Windows bug where first event is a create
1582 thread event. Caused when attached process does not have
1584 thread_id = fake_create_process ();
1590 /* Record the existence of this thread. */
1591 thread_id = current_event.dwThreadId;
1592 th = windows_add_thread
1593 (ptid_t (current_event.dwProcessId, 0, current_event.dwThreadId),
1594 current_event.u.CreateThread.hThread,
1595 current_event.u.CreateThread.lpThreadLocalBase,
1596 false /* main_thread_p */);
1600 case EXIT_THREAD_DEBUG_EVENT:
1601 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1602 (unsigned) current_event.dwProcessId,
1603 (unsigned) current_event.dwThreadId,
1604 "EXIT_THREAD_DEBUG_EVENT"));
1605 windows_delete_thread (ptid_t (current_event.dwProcessId, 0,
1606 current_event.dwThreadId),
1607 current_event.u.ExitThread.dwExitCode,
1608 false /* main_thread_p */);
1609 th = &dummy_thread_info;
1612 case CREATE_PROCESS_DEBUG_EVENT:
1613 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1614 (unsigned) current_event.dwProcessId,
1615 (unsigned) current_event.dwThreadId,
1616 "CREATE_PROCESS_DEBUG_EVENT"));
1617 CloseHandle (current_event.u.CreateProcessInfo.hFile);
1618 if (++saw_create != 1)
1621 current_process_handle = current_event.u.CreateProcessInfo.hProcess;
1622 main_thread_id = current_event.dwThreadId;
1623 /* Add the main thread. */
1624 th = windows_add_thread
1625 (ptid_t (current_event.dwProcessId, 0,
1626 current_event.dwThreadId),
1627 current_event.u.CreateProcessInfo.hThread,
1628 current_event.u.CreateProcessInfo.lpThreadLocalBase,
1629 true /* main_thread_p */);
1630 thread_id = current_event.dwThreadId;
1633 case EXIT_PROCESS_DEBUG_EVENT:
1634 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1635 (unsigned) current_event.dwProcessId,
1636 (unsigned) current_event.dwThreadId,
1637 "EXIT_PROCESS_DEBUG_EVENT"));
1638 if (!windows_initialization_done)
1640 target_terminal::ours ();
1641 target_mourn_inferior (inferior_ptid);
1642 error (_("During startup program exited with code 0x%x."),
1643 (unsigned int) current_event.u.ExitProcess.dwExitCode);
1645 else if (saw_create == 1)
1647 windows_delete_thread (ptid_t (current_event.dwProcessId, 0,
1648 current_event.dwThreadId),
1649 0, true /* main_thread_p */);
1650 ourstatus->kind = TARGET_WAITKIND_EXITED;
1651 ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode;
1652 thread_id = current_event.dwThreadId;
1656 case LOAD_DLL_DEBUG_EVENT:
1657 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1658 (unsigned) current_event.dwProcessId,
1659 (unsigned) current_event.dwThreadId,
1660 "LOAD_DLL_DEBUG_EVENT"));
1661 CloseHandle (current_event.u.LoadDll.hFile);
1662 if (saw_create != 1 || ! windows_initialization_done)
1664 catch_errors (handle_load_dll);
1665 ourstatus->kind = TARGET_WAITKIND_LOADED;
1666 ourstatus->value.integer = 0;
1667 thread_id = main_thread_id;
1670 case UNLOAD_DLL_DEBUG_EVENT:
1671 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1672 (unsigned) current_event.dwProcessId,
1673 (unsigned) current_event.dwThreadId,
1674 "UNLOAD_DLL_DEBUG_EVENT"));
1675 if (saw_create != 1 || ! windows_initialization_done)
1677 catch_errors (handle_unload_dll);
1678 ourstatus->kind = TARGET_WAITKIND_LOADED;
1679 ourstatus->value.integer = 0;
1680 thread_id = main_thread_id;
1683 case EXCEPTION_DEBUG_EVENT:
1684 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1685 (unsigned) current_event.dwProcessId,
1686 (unsigned) current_event.dwThreadId,
1687 "EXCEPTION_DEBUG_EVENT"));
1688 if (saw_create != 1)
1690 switch (handle_exception (ourstatus))
1692 case HANDLE_EXCEPTION_UNHANDLED:
1694 continue_status = DBG_EXCEPTION_NOT_HANDLED;
1696 case HANDLE_EXCEPTION_HANDLED:
1697 thread_id = current_event.dwThreadId;
1699 case HANDLE_EXCEPTION_IGNORED:
1700 continue_status = DBG_CONTINUE;
1705 case OUTPUT_DEBUG_STRING_EVENT: /* Message from the kernel. */
1706 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1707 (unsigned) current_event.dwProcessId,
1708 (unsigned) current_event.dwThreadId,
1709 "OUTPUT_DEBUG_STRING_EVENT"));
1710 if (saw_create != 1)
1712 thread_id = handle_output_debug_string (ourstatus);
1716 if (saw_create != 1)
1718 printf_unfiltered ("gdb: kernel event for pid=%u tid=0x%x\n",
1719 (unsigned) current_event.dwProcessId,
1720 (unsigned) current_event.dwThreadId);
1721 printf_unfiltered (" unknown event code %u\n",
1722 (unsigned) current_event.dwDebugEventCode);
1726 if (!thread_id || saw_create != 1)
1728 CHECK (windows_continue (continue_status, -1, 0));
1732 inferior_ptid = ptid_t (current_event.dwProcessId, 0, thread_id);
1733 current_thread = th;
1734 if (!current_thread)
1735 current_thread = thread_rec (thread_id, TRUE);
1742 /* Wait for interesting events to occur in the target process. */
1744 windows_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
1749 /* We loop when we get a non-standard exception rather than return
1750 with a SPURIOUS because resume can try and step or modify things,
1751 which needs a current_thread->h. But some of these exceptions mark
1752 the birth or death of threads, which mean that the current thread
1753 isn't necessarily what you think it is. */
1759 /* If the user presses Ctrl-c while the debugger is waiting
1760 for an event, he expects the debugger to interrupt his program
1761 and to get the prompt back. There are two possible situations:
1763 - The debugger and the program do not share the console, in
1764 which case the Ctrl-c event only reached the debugger.
1765 In that case, the ctrl_c handler will take care of interrupting
1766 the inferior. Note that this case is working starting with
1767 Windows XP. For Windows 2000, Ctrl-C should be pressed in the
1770 - The debugger and the program share the same console, in which
1771 case both debugger and inferior will receive the Ctrl-c event.
1772 In that case the ctrl_c handler will ignore the event, as the
1773 Ctrl-c event generated inside the inferior will trigger the
1774 expected debug event.
1776 FIXME: brobecker/2008-05-20: If the inferior receives the
1777 signal first and the delay until GDB receives that signal
1778 is sufficiently long, GDB can sometimes receive the SIGINT
1779 after we have unblocked the CTRL+C handler. This would
1780 lead to the debugger stopping prematurely while handling
1781 the new-thread event that comes with the handling of the SIGINT
1782 inside the inferior, and then stop again immediately when
1783 the user tries to resume the execution in the inferior.
1784 This is a classic race that we should try to fix one day. */
1785 SetConsoleCtrlHandler (&ctrl_c_handler, TRUE);
1786 retval = get_windows_debug_event (this, pid, ourstatus);
1787 SetConsoleCtrlHandler (&ctrl_c_handler, FALSE);
1790 return ptid_t (current_event.dwProcessId, 0, retval);
1795 if (deprecated_ui_loop_hook != NULL)
1796 detach = deprecated_ui_loop_hook (0);
1804 /* Iterate over all DLLs currently mapped by our inferior, and
1805 add them to our list of solibs. */
1808 windows_add_all_dlls (void)
1810 HMODULE dummy_hmodule;
1815 if (EnumProcessModules (current_process_handle, &dummy_hmodule,
1816 sizeof (HMODULE), &cb_needed) == 0)
1822 hmodules = (HMODULE *) alloca (cb_needed);
1823 if (EnumProcessModules (current_process_handle, hmodules,
1824 cb_needed, &cb_needed) == 0)
1827 for (i = 1; i < (int) (cb_needed / sizeof (HMODULE)); i++)
1831 wchar_t dll_name[__PMAX];
1834 char dll_name[__PMAX];
1837 if (GetModuleInformation (current_process_handle, hmodules[i],
1838 &mi, sizeof (mi)) == 0)
1840 if (GetModuleFileNameEx (current_process_handle, hmodules[i],
1841 dll_name, sizeof (dll_name)) == 0)
1844 wcstombs (name, dll_name, __PMAX);
1849 solib_end->next = windows_make_so (name, mi.lpBaseOfDll);
1850 solib_end = solib_end->next;
1855 do_initial_windows_stuff (struct target_ops *ops, DWORD pid, int attaching)
1858 struct inferior *inf;
1860 last_sig = GDB_SIGNAL_0;
1862 exception_count = 0;
1863 open_process_used = 0;
1864 debug_registers_changed = 0;
1865 debug_registers_used = 0;
1866 for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++)
1869 cygwin_load_start = cygwin_load_end = 0;
1871 current_event.dwProcessId = pid;
1872 memset (¤t_event, 0, sizeof (current_event));
1873 if (!target_is_pushed (ops))
1875 disable_breakpoints_in_shlibs ();
1876 windows_clear_solib ();
1877 clear_proceed_status (0);
1878 init_wait_for_inferior ();
1880 inf = current_inferior ();
1881 inferior_appeared (inf, pid);
1882 inf->attach_flag = attaching;
1884 /* Make the new process the current inferior, so terminal handling
1885 can rely on it. When attaching, we don't know about any thread
1886 id here, but that's OK --- nothing should be referencing the
1887 current thread until we report an event out of windows_wait. */
1888 inferior_ptid = ptid_t (pid);
1890 target_terminal::init ();
1891 target_terminal::inferior ();
1893 windows_initialization_done = 0;
1897 struct target_waitstatus status;
1899 ops->wait (minus_one_ptid, &status, 0);
1901 /* Note windows_wait returns TARGET_WAITKIND_SPURIOUS for thread
1903 if (status.kind != TARGET_WAITKIND_LOADED
1904 && status.kind != TARGET_WAITKIND_SPURIOUS)
1907 ops->resume (minus_one_ptid, 0, GDB_SIGNAL_0);
1910 /* Now that the inferior has been started and all DLLs have been mapped,
1911 we can iterate over all DLLs and load them in.
1913 We avoid doing it any earlier because, on certain versions of Windows,
1914 LOAD_DLL_DEBUG_EVENTs are sometimes not complete. In particular,
1915 we have seen on Windows 8.1 that the ntdll.dll load event does not
1916 include the DLL name, preventing us from creating an associated SO.
1917 A possible explanation is that ntdll.dll might be mapped before
1918 the SO info gets created by the Windows system -- ntdll.dll is
1919 the first DLL to be reported via LOAD_DLL_DEBUG_EVENT and other DLLs
1920 do not seem to suffer from that problem.
1922 Rather than try to work around this sort of issue, it is much
1923 simpler to just ignore DLL load/unload events during the startup
1924 phase, and then process them all in one batch now. */
1925 windows_add_all_dlls ();
1927 windows_initialization_done = 1;
1931 /* Try to set or remove a user privilege to the current process. Return -1
1932 if that fails, the previous setting of that privilege otherwise.
1934 This code is copied from the Cygwin source code and rearranged to allow
1935 dynamically loading of the needed symbols from advapi32 which is only
1936 available on NT/2K/XP. */
1938 set_process_privilege (const char *privilege, BOOL enable)
1940 HANDLE token_hdl = NULL;
1942 TOKEN_PRIVILEGES new_priv, orig_priv;
1946 if (!OpenProcessToken (GetCurrentProcess (),
1947 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
1951 if (!LookupPrivilegeValueA (NULL, privilege, &restore_priv))
1954 new_priv.PrivilegeCount = 1;
1955 new_priv.Privileges[0].Luid = restore_priv;
1956 new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0;
1958 if (!AdjustTokenPrivileges (token_hdl, FALSE, &new_priv,
1959 sizeof orig_priv, &orig_priv, &size))
1962 /* Disabled, otherwise every `attach' in an unprivileged user session
1963 would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
1964 windows_attach(). */
1965 /* AdjustTokenPrivileges returns TRUE even if the privilege could not
1966 be enabled. GetLastError () returns an correct error code, though. */
1967 if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED)
1971 ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0;
1975 CloseHandle (token_hdl);
1980 /* Attach to process PID, then initialize for debugging it. */
1983 windows_nat_target::attach (const char *args, int from_tty)
1988 pid = parse_pid_to_attach (args);
1990 if (set_process_privilege (SE_DEBUG_NAME, TRUE) < 0)
1992 printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n");
1993 printf_unfiltered ("This can cause attach to "
1994 "fail on Windows NT/2K/XP\n");
1997 windows_init_thread_list ();
1998 ok = DebugActiveProcess (pid);
2004 /* Try fall back to Cygwin pid. */
2005 pid = cygwin_internal (CW_CYGWIN_PID_TO_WINPID, pid);
2008 ok = DebugActiveProcess (pid);
2013 error (_("Can't attach to process."));
2015 DebugSetProcessKillOnExit (FALSE);
2019 char *exec_file = (char *) get_exec_file (0);
2022 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file,
2023 target_pid_to_str (ptid_t (pid)));
2025 printf_unfiltered ("Attaching to %s\n",
2026 target_pid_to_str (ptid_t (pid)));
2028 gdb_flush (gdb_stdout);
2031 do_initial_windows_stuff (this, pid, 1);
2032 target_terminal::ours ();
2036 windows_nat_target::detach (inferior *inf, int from_tty)
2040 ptid_t ptid = minus_one_ptid;
2041 resume (ptid, 0, GDB_SIGNAL_0);
2043 if (!DebugActiveProcessStop (current_event.dwProcessId))
2045 error (_("Can't detach process %u (error %u)"),
2046 (unsigned) current_event.dwProcessId, (unsigned) GetLastError ());
2049 DebugSetProcessKillOnExit (FALSE);
2051 if (detached && from_tty)
2053 const char *exec_file = get_exec_file (0);
2056 printf_unfiltered ("Detaching from program: %s, Pid %u\n", exec_file,
2057 (unsigned) current_event.dwProcessId);
2058 gdb_flush (gdb_stdout);
2061 x86_cleanup_dregs ();
2062 inferior_ptid = null_ptid;
2063 detach_inferior (inf);
2065 maybe_unpush_target ();
2068 /* Try to determine the executable filename.
2070 EXE_NAME_RET is a pointer to a buffer whose size is EXE_NAME_MAX_LEN.
2072 Upon success, the filename is stored inside EXE_NAME_RET, and
2073 this function returns nonzero.
2075 Otherwise, this function returns zero and the contents of
2076 EXE_NAME_RET is undefined. */
2079 windows_get_exec_module_filename (char *exe_name_ret, size_t exe_name_max_len)
2086 if (!EnumProcessModules (current_process_handle, &dh_buf,
2087 sizeof (HMODULE), &cbNeeded) || !cbNeeded)
2090 /* We know the executable is always first in the list of modules,
2091 which we just fetched. So no need to fetch more. */
2095 /* Cygwin prefers that the path be in /x/y/z format, so extract
2096 the filename into a temporary buffer first, and then convert it
2097 to POSIX format into the destination buffer. */
2098 cygwin_buf_t *pathbuf = (cygwin_buf_t *) alloca (exe_name_max_len * sizeof (cygwin_buf_t));
2100 len = GetModuleFileNameEx (current_process_handle,
2101 dh_buf, pathbuf, exe_name_max_len);
2103 error (_("Error getting executable filename: %u."),
2104 (unsigned) GetLastError ());
2105 if (cygwin_conv_path (CCP_WIN_W_TO_POSIX, pathbuf, exe_name_ret,
2106 exe_name_max_len) < 0)
2107 error (_("Error converting executable filename to POSIX: %d."), errno);
2110 len = GetModuleFileNameEx (current_process_handle,
2111 dh_buf, exe_name_ret, exe_name_max_len);
2113 error (_("Error getting executable filename: %u."),
2114 (unsigned) GetLastError ());
2117 return 1; /* success */
2120 /* The pid_to_exec_file target_ops method for this platform. */
2123 windows_nat_target::pid_to_exec_file (int pid)
2125 static char path[__PMAX];
2127 /* Try to find exe name as symlink target of /proc/<pid>/exe. */
2129 char procexe[sizeof ("/proc/4294967295/exe")];
2131 xsnprintf (procexe, sizeof (procexe), "/proc/%u/exe", pid);
2132 nchars = readlink (procexe, path, sizeof(path));
2133 if (nchars > 0 && nchars < sizeof (path))
2135 path[nchars] = '\0'; /* Got it */
2140 /* If we get here then either Cygwin is hosed, this isn't a Cygwin version
2141 of gdb, or we're trying to debug a non-Cygwin windows executable. */
2142 if (!windows_get_exec_module_filename (path, sizeof (path)))
2148 /* Print status information about what we're accessing. */
2151 windows_nat_target::files_info ()
2153 struct inferior *inf = current_inferior ();
2155 printf_unfiltered ("\tUsing the running image of %s %s.\n",
2156 inf->attach_flag ? "attached" : "child",
2157 target_pid_to_str (inferior_ptid));
2160 /* Modify CreateProcess parameters for use of a new separate console.
2162 *FLAGS: DWORD parameter for general process creation flags.
2163 *SI: STARTUPINFO structure, for which the console window size and
2164 console buffer size is filled in if GDB is running in a console.
2165 to create the new console.
2166 The size of the used font is not available on all versions of
2167 Windows OS. Furthermore, the current font might not be the default
2168 font, but this is still better than before.
2169 If the windows and buffer sizes are computed,
2170 SI->DWFLAGS is changed so that this information is used
2171 by CreateProcess function. */
2174 windows_set_console_info (STARTUPINFO *si, DWORD *flags)
2176 HANDLE hconsole = CreateFile ("CONOUT$", GENERIC_READ | GENERIC_WRITE,
2177 FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0);
2179 if (hconsole != INVALID_HANDLE_VALUE)
2181 CONSOLE_SCREEN_BUFFER_INFO sbinfo;
2183 CONSOLE_FONT_INFO cfi;
2185 GetCurrentConsoleFont (hconsole, FALSE, &cfi);
2186 font_size = GetConsoleFontSize (hconsole, cfi.nFont);
2187 GetConsoleScreenBufferInfo(hconsole, &sbinfo);
2188 si->dwXSize = sbinfo.srWindow.Right - sbinfo.srWindow.Left + 1;
2189 si->dwYSize = sbinfo.srWindow.Bottom - sbinfo.srWindow.Top + 1;
2191 si->dwXSize *= font_size.X;
2195 si->dwYSize *= font_size.Y;
2198 si->dwXCountChars = sbinfo.dwSize.X;
2199 si->dwYCountChars = sbinfo.dwSize.Y;
2200 si->dwFlags |= STARTF_USESIZE | STARTF_USECOUNTCHARS;
2202 *flags |= CREATE_NEW_CONSOLE;
2206 /* Function called by qsort to sort environment strings. */
2209 envvar_cmp (const void *a, const void *b)
2211 const char **p = (const char **) a;
2212 const char **q = (const char **) b;
2213 return strcasecmp (*p, *q);
2219 clear_win32_environment (char **env)
2223 wchar_t *copy = NULL, *equalpos;
2225 for (i = 0; env[i] && *env[i]; i++)
2227 len = mbstowcs (NULL, env[i], 0) + 1;
2228 copy = (wchar_t *) xrealloc (copy, len * sizeof (wchar_t));
2229 mbstowcs (copy, env[i], len);
2230 equalpos = wcschr (copy, L'=');
2233 SetEnvironmentVariableW (copy, NULL);
2241 /* Redirection of inferior I/O streams for native MS-Windows programs.
2242 Unlike on Unix, where this is handled by invoking the inferior via
2243 the shell, on MS-Windows we need to emulate the cmd.exe shell.
2245 The official documentation of the cmd.exe redirection features is here:
2247 http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/redirection.mspx
2249 (That page talks about Windows XP, but there's no newer
2250 documentation, so we assume later versions of cmd.exe didn't change
2253 Caveat: the documentation on that page seems to include a few lies.
2254 For example, it describes strange constructs 1<&2 and 2<&1, which
2255 seem to work only when 1>&2 resp. 2>&1 would make sense, and so I
2256 think the cmd.exe parser of the redirection symbols simply doesn't
2257 care about the < vs > distinction in these cases. Therefore, the
2258 supported features are explicitly documented below.
2260 The emulation below aims at supporting all the valid use cases
2261 supported by cmd.exe, which include:
2263 < FILE redirect standard input from FILE
2264 0< FILE redirect standard input from FILE
2265 <&N redirect standard input from file descriptor N
2266 0<&N redirect standard input from file descriptor N
2267 > FILE redirect standard output to FILE
2268 >> FILE append standard output to FILE
2269 1>> FILE append standard output to FILE
2270 >&N redirect standard output to file descriptor N
2271 1>&N redirect standard output to file descriptor N
2272 >>&N append standard output to file descriptor N
2273 1>>&N append standard output to file descriptor N
2274 2> FILE redirect standard error to FILE
2275 2>> FILE append standard error to FILE
2276 2>&N redirect standard error to file descriptor N
2277 2>>&N append standard error to file descriptor N
2279 Note that using N > 2 in the above construct is supported, but
2280 requires that the corresponding file descriptor be open by some
2281 means elsewhere or outside GDB. Also note that using ">&0" or
2282 "<&2" will generally fail, because the file descriptor redirected
2283 from is normally open in an incompatible mode (e.g., FD 0 is open
2284 for reading only). IOW, use of such tricks is not recommended;
2285 you are on your own.
2287 We do NOT support redirection of file descriptors above 2, as in
2288 "3>SOME-FILE", because MinGW compiled programs don't (supporting
2289 that needs special handling in the startup code that MinGW
2290 doesn't have). Pipes are also not supported.
2292 As for invalid use cases, where the redirection contains some
2293 error, the emulation below will detect that and produce some
2294 error and/or failure. But the behavior in those cases is not
2295 bug-for-bug compatible with what cmd.exe does in those cases.
2296 That's because what cmd.exe does then is not well defined, and
2297 seems to be a side effect of the cmd.exe parsing of the command
2298 line more than anything else. For example, try redirecting to an
2299 invalid file name, as in "> foo:bar".
2301 There are also minor syntactic deviations from what cmd.exe does
2302 in some corner cases. For example, it doesn't support the likes
2303 of "> &foo" to mean redirect to file named literally "&foo"; we
2304 do support that here, because that, too, sounds like some issue
2305 with the cmd.exe parser. Another nicety is that we support
2306 redirection targets that use file names with forward slashes,
2307 something cmd.exe doesn't -- this comes in handy since GDB
2308 file-name completion can be used when typing the command line for
2311 /* Support routines for redirecting standard handles of the inferior. */
2313 /* Parse a single redirection spec, open/duplicate the specified
2314 file/fd, and assign the appropriate value to one of the 3 standard
2315 file descriptors. */
2317 redir_open (const char *redir_string, int *inp, int *out, int *err)
2319 int *fd, ref_fd = -2;
2321 const char *fname = redir_string + 1;
2322 int rc = *redir_string;
2337 fd = (rc == '2') ? err : out;
2338 mode = O_WRONLY | O_CREAT;
2351 if (*fname == '&' && '0' <= fname[1] && fname[1] <= '9')
2353 /* A reference to a file descriptor. */
2355 ref_fd = (int) strtol (fname + 1, &fdtail, 10);
2356 if (fdtail > fname + 1 && *fdtail == '\0')
2358 /* Don't allow redirection when open modes are incompatible. */
2359 if ((ref_fd == 0 && (fd == out || fd == err))
2360 || ((ref_fd == 1 || ref_fd == 2) && fd == inp))
2367 else if (ref_fd == 1)
2369 else if (ref_fd == 2)
2379 fname++; /* skip the separator space */
2380 /* If the descriptor is already open, close it. This allows
2381 multiple specs of redirections for the same stream, which is
2382 somewhat nonsensical, but still valid and supported by cmd.exe.
2383 (But cmd.exe only opens a single file in this case, the one
2384 specified by the last redirection spec on the command line.) */
2389 *fd = _open (fname, mode, _S_IREAD | _S_IWRITE);
2393 else if (ref_fd == -1)
2394 *fd = -1; /* reset to default destination */
2397 *fd = _dup (ref_fd);
2401 /* _open just sets a flag for O_APPEND, which won't be passed to the
2402 inferior, so we need to actually move the file pointer. */
2403 if ((mode & O_APPEND) != 0)
2404 _lseek (*fd, 0L, SEEK_END);
2408 /* Canonicalize a single redirection spec and set up the corresponding
2409 file descriptor as specified. */
2411 redir_set_redirection (const char *s, int *inp, int *out, int *err)
2413 char buf[__PMAX + 2 + 5]; /* extra space for quotes & redirection string */
2415 const char *start = s;
2418 *d++ = *s++; /* copy the 1st character, < or > or a digit */
2419 if ((*start == '>' || *start == '1' || *start == '2')
2423 if (*s == '>' && *start != '>')
2426 else if (*start == '0' && *s == '<')
2428 /* cmd.exe recognizes "&N" only immediately after the redirection symbol. */
2431 while (isspace (*s)) /* skip whitespace before file name */
2433 *d++ = ' '; /* separate file name with a single space */
2436 /* Copy the file name. */
2439 /* Remove quoting characters from the file name in buf[]. */
2440 if (*s == '"') /* could support '..' quoting here */
2444 else if (*s == quote)
2452 else if (*s == '\\')
2454 if (s[1] == '"') /* could support '..' here */
2458 else if (isspace (*s) && !quote)
2462 if (d - buf >= sizeof (buf) - 1)
2464 errno = ENAMETOOLONG;
2470 /* Windows doesn't allow redirection characters in file names, so we
2471 can bail out early if they use them, or if there's no target file
2472 name after the redirection symbol. */
2473 if (d[-1] == '>' || d[-1] == '<')
2478 if (redir_open (buf, inp, out, err) == 0)
2483 /* Parse the command line for redirection specs and prepare the file
2484 descriptors for the 3 standard streams accordingly. */
2486 redirect_inferior_handles (const char *cmd_orig, char *cmd,
2487 int *inp, int *out, int *err)
2489 const char *s = cmd_orig;
2492 bool retval = false;
2494 while (isspace (*s))
2499 if (*s == '"') /* could also support '..' quoting here */
2503 else if (*s == quote)
2506 else if (*s == '\\')
2508 if (s[1] == '"') /* escaped quote char */
2513 /* Process a single redirection candidate. */
2514 if (*s == '<' || *s == '>'
2515 || ((*s == '1' || *s == '2') && s[1] == '>')
2516 || (*s == '0' && s[1] == '<'))
2518 int skip = redir_set_redirection (s, inp, out, err);
2532 #endif /* !__CYGWIN__ */
2534 /* Start an inferior windows child process and sets inferior_ptid to its pid.
2535 EXEC_FILE is the file to run.
2536 ALLARGS is a string containing the arguments to the program.
2537 ENV is the environment vector to pass. Errors reported with error(). */
2540 windows_nat_target::create_inferior (const char *exec_file,
2541 const std::string &origallargs,
2542 char **in_env, int from_tty)
2546 cygwin_buf_t real_path[__PMAX];
2547 cygwin_buf_t shell[__PMAX]; /* Path to shell */
2548 cygwin_buf_t infcwd[__PMAX];
2550 cygwin_buf_t *toexec;
2551 cygwin_buf_t *cygallargs;
2553 char **old_env = NULL;
2557 int ostdin, ostdout, ostderr;
2558 #else /* !__CYGWIN__ */
2559 char shell[__PMAX]; /* Path to shell */
2561 char *args, *allargs_copy;
2562 size_t args_len, allargs_len;
2563 int fd_inp = -1, fd_out = -1, fd_err = -1;
2564 HANDLE tty = INVALID_HANDLE_VALUE;
2565 bool redirected = false;
2572 #endif /* !__CYGWIN__ */
2573 const char *allargs = origallargs.c_str ();
2574 PROCESS_INFORMATION pi;
2577 const char *inferior_io_terminal = get_inferior_io_terminal ();
2580 error (_("No executable specified, use `target exec'."));
2582 const char *inferior_cwd = get_inferior_cwd ();
2583 std::string expanded_infcwd;
2584 if (inferior_cwd != NULL)
2586 expanded_infcwd = gdb_tilde_expand (inferior_cwd);
2587 /* Mirror slashes on inferior's cwd. */
2588 std::replace (expanded_infcwd.begin (), expanded_infcwd.end (),
2590 inferior_cwd = expanded_infcwd.c_str ();
2593 memset (&si, 0, sizeof (si));
2594 si.cb = sizeof (si);
2597 flags |= CREATE_NEW_PROCESS_GROUP;
2600 windows_set_console_info (&si, &flags);
2605 flags |= DEBUG_ONLY_THIS_PROCESS;
2606 if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, exec_file, real_path,
2607 __PMAX * sizeof (cygwin_buf_t)) < 0)
2608 error (_("Error starting executable: %d"), errno);
2611 len = mbstowcs (NULL, allargs, 0) + 1;
2612 if (len == (size_t) -1)
2613 error (_("Error starting executable: %d"), errno);
2614 cygallargs = (wchar_t *) alloca (len * sizeof (wchar_t));
2615 mbstowcs (cygallargs, allargs, len);
2616 #else /* !__USEWIDE */
2617 cygallargs = allargs;
2623 if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, sh, shell, __PMAX) < 0)
2624 error (_("Error starting executable via shell: %d"), errno);
2626 len = sizeof (L" -c 'exec '") + mbstowcs (NULL, exec_file, 0)
2627 + mbstowcs (NULL, allargs, 0) + 2;
2628 cygallargs = (wchar_t *) alloca (len * sizeof (wchar_t));
2629 swprintf (cygallargs, len, L" -c 'exec %s %s'", exec_file, allargs);
2630 #else /* !__USEWIDE */
2631 len = (sizeof (" -c 'exec '") + strlen (exec_file)
2632 + strlen (allargs) + 2);
2633 cygallargs = (char *) alloca (len);
2634 xsnprintf (cygallargs, len, " -c 'exec %s %s'", exec_file, allargs);
2635 #endif /* __USEWIDE */
2637 flags |= DEBUG_PROCESS;
2640 if (inferior_cwd != NULL
2641 && cygwin_conv_path (CCP_POSIX_TO_WIN_W, inferior_cwd,
2642 infcwd, strlen (inferior_cwd)) < 0)
2643 error (_("Error converting inferior cwd: %d"), errno);
2646 args = (cygwin_buf_t *) alloca ((wcslen (toexec) + wcslen (cygallargs) + 2)
2647 * sizeof (wchar_t));
2648 wcscpy (args, toexec);
2649 wcscat (args, L" ");
2650 wcscat (args, cygallargs);
2651 #else /* !__USEWIDE */
2652 args = (cygwin_buf_t *) alloca (strlen (toexec) + strlen (cygallargs) + 2);
2653 strcpy (args, toexec);
2655 strcat (args, cygallargs);
2656 #endif /* !__USEWIDE */
2658 #ifdef CW_CVT_ENV_TO_WINENV
2659 /* First try to create a direct Win32 copy of the POSIX environment. */
2660 w32_env = (PWCHAR) cygwin_internal (CW_CVT_ENV_TO_WINENV, in_env);
2661 if (w32_env != (PWCHAR) -1)
2662 flags |= CREATE_UNICODE_ENVIRONMENT;
2664 /* If that fails, fall back to old method tweaking GDB's environment. */
2665 #endif /* CW_CVT_ENV_TO_WINENV */
2667 /* Reset all Win32 environment variables to avoid leftover on next run. */
2668 clear_win32_environment (environ);
2669 /* Prepare the environment vars for CreateProcess. */
2672 cygwin_internal (CW_SYNC_WINENV);
2676 if (!inferior_io_terminal)
2677 tty = ostdin = ostdout = ostderr = -1;
2680 tty = open (inferior_io_terminal, O_RDWR | O_NOCTTY);
2683 print_sys_errmsg (inferior_io_terminal, errno);
2684 ostdin = ostdout = ostderr = -1;
2697 windows_init_thread_list ();
2698 ret = CreateProcess (0,
2699 args, /* command line */
2700 NULL, /* Security */
2702 TRUE, /* inherit handles */
2703 flags, /* start flags */
2704 w32_env, /* environment */
2705 inferior_cwd != NULL ? infcwd : NULL, /* current
2710 /* Just free the Win32 environment, if it could be created. */
2714 /* Reset all environment variables to avoid leftover on next run. */
2715 clear_win32_environment (in_env);
2716 /* Restore normal GDB environment variables. */
2718 cygwin_internal (CW_SYNC_WINENV);
2731 #else /* !__CYGWIN__ */
2732 allargs_len = strlen (allargs);
2733 allargs_copy = strcpy ((char *) alloca (allargs_len + 1), allargs);
2734 if (strpbrk (allargs_copy, "<>") != NULL)
2739 redirect_inferior_handles (allargs, allargs_copy,
2740 &fd_inp, &fd_out, &fd_err);
2742 warning (_("Error in redirection: %s."), strerror (errno));
2745 allargs_len = strlen (allargs_copy);
2747 /* If not all the standard streams are redirected by the command
2748 line, use inferior_io_terminal for those which aren't. */
2749 if (inferior_io_terminal
2750 && !(fd_inp >= 0 && fd_out >= 0 && fd_err >= 0))
2752 SECURITY_ATTRIBUTES sa;
2753 sa.nLength = sizeof(sa);
2754 sa.lpSecurityDescriptor = 0;
2755 sa.bInheritHandle = TRUE;
2756 tty = CreateFileA (inferior_io_terminal, GENERIC_READ | GENERIC_WRITE,
2757 0, &sa, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
2758 if (tty == INVALID_HANDLE_VALUE)
2759 warning (_("Warning: Failed to open TTY %s, error %#x."),
2760 inferior_io_terminal, (unsigned) GetLastError ());
2762 if (redirected || tty != INVALID_HANDLE_VALUE)
2765 si.hStdInput = (HANDLE) _get_osfhandle (fd_inp);
2766 else if (tty != INVALID_HANDLE_VALUE)
2769 si.hStdInput = GetStdHandle (STD_INPUT_HANDLE);
2771 si.hStdOutput = (HANDLE) _get_osfhandle (fd_out);
2772 else if (tty != INVALID_HANDLE_VALUE)
2773 si.hStdOutput = tty;
2775 si.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE);
2777 si.hStdError = (HANDLE) _get_osfhandle (fd_err);
2778 else if (tty != INVALID_HANDLE_VALUE)
2781 si.hStdError = GetStdHandle (STD_ERROR_HANDLE);
2782 si.dwFlags |= STARTF_USESTDHANDLES;
2786 /* Build the command line, a space-separated list of tokens where
2787 the first token is the name of the module to be executed.
2788 To avoid ambiguities introduced by spaces in the module name,
2790 args_len = strlen (toexec) + 2 /* quotes */ + allargs_len + 2;
2791 args = (char *) alloca (args_len);
2792 xsnprintf (args, args_len, "\"%s\" %s", toexec, allargs_copy);
2794 flags |= DEBUG_ONLY_THIS_PROCESS;
2796 /* CreateProcess takes the environment list as a null terminated set of
2797 strings (i.e. two nulls terminate the list). */
2799 /* Get total size for env strings. */
2800 for (envlen = 0, i = 0; in_env[i] && *in_env[i]; i++)
2801 envlen += strlen (in_env[i]) + 1;
2803 envsize = sizeof (in_env[0]) * (i + 1);
2804 env = (char **) alloca (envsize);
2805 memcpy (env, in_env, envsize);
2806 /* Windows programs expect the environment block to be sorted. */
2807 qsort (env, i, sizeof (char *), envvar_cmp);
2809 w32env = (char *) alloca (envlen + 1);
2811 /* Copy env strings into new buffer. */
2812 for (temp = w32env, i = 0; env[i] && *env[i]; i++)
2814 strcpy (temp, env[i]);
2815 temp += strlen (temp) + 1;
2818 /* Final nil string to terminate new env. */
2821 windows_init_thread_list ();
2822 ret = CreateProcessA (0,
2823 args, /* command line */
2824 NULL, /* Security */
2826 TRUE, /* inherit handles */
2827 flags, /* start flags */
2828 w32env, /* environment */
2829 inferior_cwd, /* current directory */
2832 if (tty != INVALID_HANDLE_VALUE)
2840 #endif /* !__CYGWIN__ */
2843 error (_("Error creating process %s, (error %u)."),
2844 exec_file, (unsigned) GetLastError ());
2846 CloseHandle (pi.hThread);
2847 CloseHandle (pi.hProcess);
2849 if (useshell && shell[0] != '\0')
2854 do_initial_windows_stuff (this, pi.dwProcessId, 0);
2856 /* windows_continue (DBG_CONTINUE, -1, 0); */
2860 windows_nat_target::mourn_inferior ()
2862 (void) windows_continue (DBG_CONTINUE, -1, 0);
2863 x86_cleanup_dregs();
2864 if (open_process_used)
2866 CHECK (CloseHandle (current_process_handle));
2867 open_process_used = 0;
2869 inf_child_target::mourn_inferior ();
2872 /* Send a SIGINT to the process group. This acts just like the user typed a
2873 ^C on the controlling terminal. */
2876 windows_nat_target::interrupt ()
2878 DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n"));
2879 CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId));
2880 registers_changed (); /* refresh register state */
2883 /* Helper for windows_xfer_partial that handles memory transfers.
2884 Arguments are like target_xfer_partial. */
2886 static enum target_xfer_status
2887 windows_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf,
2888 ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
2892 DWORD lasterror = 0;
2894 if (writebuf != NULL)
2896 DEBUG_MEM (("gdb: write target memory, %s bytes at %s\n",
2897 pulongest (len), core_addr_to_string (memaddr)));
2898 success = WriteProcessMemory (current_process_handle,
2899 (LPVOID) (uintptr_t) memaddr, writebuf,
2902 lasterror = GetLastError ();
2903 FlushInstructionCache (current_process_handle,
2904 (LPCVOID) (uintptr_t) memaddr, len);
2908 DEBUG_MEM (("gdb: read target memory, %s bytes at %s\n",
2909 pulongest (len), core_addr_to_string (memaddr)));
2910 success = ReadProcessMemory (current_process_handle,
2911 (LPCVOID) (uintptr_t) memaddr, readbuf,
2914 lasterror = GetLastError ();
2916 *xfered_len = (ULONGEST) done;
2917 if (!success && lasterror == ERROR_PARTIAL_COPY && done > 0)
2918 return TARGET_XFER_OK;
2920 return success ? TARGET_XFER_OK : TARGET_XFER_E_IO;
2924 windows_nat_target::kill ()
2926 CHECK (TerminateProcess (current_process_handle, 0));
2930 if (!windows_continue (DBG_CONTINUE, -1, 1))
2932 if (!WaitForDebugEvent (¤t_event, INFINITE))
2934 if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT)
2938 target_mourn_inferior (inferior_ptid); /* Or just windows_mourn_inferior? */
2942 windows_nat_target::close ()
2944 DEBUG_EVENTS (("gdb: windows_close, inferior_ptid=%d\n",
2945 inferior_ptid.pid ()));
2948 /* Convert pid to printable format. */
2950 windows_nat_target::pid_to_str (ptid_t ptid)
2952 static char buf[80];
2954 if (ptid.tid () != 0)
2956 snprintf (buf, sizeof (buf), "Thread %d.0x%lx",
2957 ptid.pid (), ptid.tid ());
2961 return normal_pid_to_str (ptid);
2964 static enum target_xfer_status
2965 windows_xfer_shared_libraries (struct target_ops *ops,
2966 enum target_object object, const char *annex,
2967 gdb_byte *readbuf, const gdb_byte *writebuf,
2968 ULONGEST offset, ULONGEST len,
2969 ULONGEST *xfered_len)
2971 struct obstack obstack;
2977 return TARGET_XFER_E_IO;
2979 obstack_init (&obstack);
2980 obstack_grow_str (&obstack, "<library-list>\n");
2981 for (so = solib_start.next; so; so = so->next)
2983 lm_info_windows *li = (lm_info_windows *) so->lm_info;
2985 windows_xfer_shared_library (so->so_name, (CORE_ADDR)
2986 (uintptr_t) li->load_addr,
2987 target_gdbarch (), &obstack);
2989 obstack_grow_str0 (&obstack, "</library-list>\n");
2991 buf = (const char *) obstack_finish (&obstack);
2992 len_avail = strlen (buf);
2993 if (offset >= len_avail)
2997 if (len > len_avail - offset)
2998 len = len_avail - offset;
2999 memcpy (readbuf, buf + offset, len);
3002 obstack_free (&obstack, NULL);
3003 *xfered_len = (ULONGEST) len;
3004 return len != 0 ? TARGET_XFER_OK : TARGET_XFER_EOF;
3007 enum target_xfer_status
3008 windows_nat_target::xfer_partial (enum target_object object,
3009 const char *annex, gdb_byte *readbuf,
3010 const gdb_byte *writebuf, ULONGEST offset,
3011 ULONGEST len, ULONGEST *xfered_len)
3015 case TARGET_OBJECT_MEMORY:
3016 return windows_xfer_memory (readbuf, writebuf, offset, len, xfered_len);
3018 case TARGET_OBJECT_LIBRARIES:
3019 return windows_xfer_shared_libraries (this, object, annex, readbuf,
3020 writebuf, offset, len, xfered_len);
3023 if (beneath () == NULL)
3025 /* This can happen when requesting the transfer of unsupported
3026 objects before a program has been started (and therefore
3027 with the current_target having no target beneath). */
3028 return TARGET_XFER_E_IO;
3030 return beneath ()->xfer_partial (object, annex,
3031 readbuf, writebuf, offset, len,
3036 /* Provide thread local base, i.e. Thread Information Block address.
3037 Returns 1 if ptid is found and sets *ADDR to thread_local_base. */
3040 windows_nat_target::get_tib_address (ptid_t ptid, CORE_ADDR *addr)
3042 windows_thread_info *th;
3044 th = thread_rec (ptid.tid (), 0);
3049 *addr = th->thread_local_base;
3055 windows_nat_target::get_ada_task_ptid (long lwp, long thread)
3057 return ptid_t (inferior_ptid.pid (), 0, lwp);
3060 /* Implementation of the to_thread_name method. */
3063 windows_nat_target::thread_name (struct thread_info *thr)
3065 return thread_rec (thr->ptid.tid (), 0)->name;
3070 _initialize_windows_nat (void)
3072 x86_dr_low.set_control = cygwin_set_dr7;
3073 x86_dr_low.set_addr = cygwin_set_dr;
3074 x86_dr_low.get_addr = cygwin_get_dr;
3075 x86_dr_low.get_status = cygwin_get_dr6;
3076 x86_dr_low.get_control = cygwin_get_dr7;
3078 /* x86_dr_low.debug_register_length field is set by
3079 calling x86_set_debug_register_length function
3080 in processor windows specific native file. */
3082 add_inf_child_target (&the_windows_nat_target);
3085 cygwin_internal (CW_SET_DOS_FILE_WARNING, 0);
3088 add_com ("signal-event", class_run, signal_event_command, _("\
3089 Signal a crashed process with event ID, to allow its debugging.\n\
3090 This command is needed in support of setting up GDB as JIT debugger on \
3091 MS-Windows. The command should be invoked from the GDB command line using \
3092 the '-ex' command-line option. The ID of the event that blocks the \
3093 crashed process will be supplied by the Windows JIT debugging mechanism."));
3096 add_setshow_boolean_cmd ("shell", class_support, &useshell, _("\
3097 Set use of shell to start subprocess."), _("\
3098 Show use of shell to start subprocess."), NULL,
3100 NULL, /* FIXME: i18n: */
3101 &setlist, &showlist);
3103 add_setshow_boolean_cmd ("cygwin-exceptions", class_support,
3104 &cygwin_exceptions, _("\
3105 Break when an exception is detected in the Cygwin DLL itself."), _("\
3106 Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL,
3108 NULL, /* FIXME: i18n: */
3109 &setlist, &showlist);
3112 add_setshow_boolean_cmd ("new-console", class_support, &new_console, _("\
3113 Set creation of new console when creating child process."), _("\
3114 Show creation of new console when creating child process."), NULL,
3116 NULL, /* FIXME: i18n: */
3117 &setlist, &showlist);
3119 add_setshow_boolean_cmd ("new-group", class_support, &new_group, _("\
3120 Set creation of new group when creating child process."), _("\
3121 Show creation of new group when creating child process."), NULL,
3123 NULL, /* FIXME: i18n: */
3124 &setlist, &showlist);
3126 add_setshow_boolean_cmd ("debugexec", class_support, &debug_exec, _("\
3127 Set whether to display execution in child process."), _("\
3128 Show whether to display execution in child process."), NULL,
3130 NULL, /* FIXME: i18n: */
3131 &setlist, &showlist);
3133 add_setshow_boolean_cmd ("debugevents", class_support, &debug_events, _("\
3134 Set whether to display kernel events in child process."), _("\
3135 Show whether to display kernel events in child process."), NULL,
3137 NULL, /* FIXME: i18n: */
3138 &setlist, &showlist);
3140 add_setshow_boolean_cmd ("debugmemory", class_support, &debug_memory, _("\
3141 Set whether to display memory accesses in child process."), _("\
3142 Show whether to display memory accesses in child process."), NULL,
3144 NULL, /* FIXME: i18n: */
3145 &setlist, &showlist);
3147 add_setshow_boolean_cmd ("debugexceptions", class_support,
3148 &debug_exceptions, _("\
3149 Set whether to display kernel exceptions in child process."), _("\
3150 Show whether to display kernel exceptions in child process."), NULL,
3152 NULL, /* FIXME: i18n: */
3153 &setlist, &showlist);
3155 init_w32_command_list ();
3157 add_cmd ("selector", class_info, display_selectors,
3158 _("Display selectors infos."),
3162 /* Hardware watchpoint support, adapted from go32-nat.c code. */
3164 /* Pass the address ADDR to the inferior in the I'th debug register.
3165 Here we just store the address in dr array, the registers will be
3166 actually set up when windows_continue is called. */
3168 cygwin_set_dr (int i, CORE_ADDR addr)
3171 internal_error (__FILE__, __LINE__,
3172 _("Invalid register %d in cygwin_set_dr.\n"), i);
3174 debug_registers_changed = 1;
3175 debug_registers_used = 1;
3178 /* Pass the value VAL to the inferior in the DR7 debug control
3179 register. Here we just store the address in D_REGS, the watchpoint
3180 will be actually set up in windows_wait. */
3182 cygwin_set_dr7 (unsigned long val)
3184 dr[7] = (CORE_ADDR) val;
3185 debug_registers_changed = 1;
3186 debug_registers_used = 1;
3189 /* Get the value of debug register I from the inferior. */
3192 cygwin_get_dr (int i)
3197 /* Get the value of the DR6 debug status register from the inferior.
3198 Here we just return the value stored in dr[6]
3199 by the last call to thread_rec for current_event.dwThreadId id. */
3200 static unsigned long
3201 cygwin_get_dr6 (void)
3203 return (unsigned long) dr[6];
3206 /* Get the value of the DR7 debug status register from the inferior.
3207 Here we just return the value stored in dr[7] by the last call to
3208 thread_rec for current_event.dwThreadId id. */
3210 static unsigned long
3211 cygwin_get_dr7 (void)
3213 return (unsigned long) dr[7];
3216 /* Determine if the thread referenced by "ptid" is alive
3217 by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
3218 it means that the thread has died. Otherwise it is assumed to be alive. */
3221 windows_nat_target::thread_alive (ptid_t ptid)
3225 gdb_assert (ptid.tid () != 0);
3228 return WaitForSingleObject (thread_rec (tid, FALSE)->h, 0) != WAIT_OBJECT_0;
3232 _initialize_check_for_gdb_ini (void)
3235 if (inhibit_gdbinit)
3238 homedir = getenv ("HOME");
3242 char *oldini = (char *) alloca (strlen (homedir) +
3243 sizeof ("gdb.ini") + 1);
3244 strcpy (oldini, homedir);
3245 p = strchr (oldini, '\0');
3246 if (p > oldini && !IS_DIR_SEPARATOR (p[-1]))
3248 strcpy (p, "gdb.ini");
3249 if (access (oldini, 0) == 0)
3251 int len = strlen (oldini);
3252 char *newini = (char *) alloca (len + 2);
3254 xsnprintf (newini, len + 2, "%.*s.gdbinit",
3255 (int) (len - (sizeof ("gdb.ini") - 1)), oldini);
3256 warning (_("obsolete '%s' found. Rename to '%s'."), oldini, newini);
3261 /* Define dummy functions which always return error for the rare cases where
3262 these functions could not be found. */
3264 bad_DebugActiveProcessStop (DWORD w)
3269 bad_DebugBreakProcess (HANDLE w)
3274 bad_DebugSetProcessKillOnExit (BOOL w)
3279 bad_EnumProcessModules (HANDLE w, HMODULE *x, DWORD y, LPDWORD z)
3286 bad_GetModuleFileNameExW (HANDLE w, HMODULE x, LPWSTR y, DWORD z)
3292 bad_GetModuleFileNameExA (HANDLE w, HMODULE x, LPSTR y, DWORD z)
3299 bad_GetModuleInformation (HANDLE w, HMODULE x, LPMODULEINFO y, DWORD z)
3305 bad_OpenProcessToken (HANDLE w, DWORD x, PHANDLE y)
3311 bad_GetCurrentConsoleFont (HANDLE w, BOOL bMaxWindow, CONSOLE_FONT_INFO *f)
3317 bad_GetConsoleFontSize (HANDLE w, DWORD nFont)
3325 /* Load any functions which may not be available in ancient versions
3329 _initialize_loadable (void)
3333 #define GPA(m, func) \
3334 func = (func ## _ftype *) GetProcAddress (m, #func)
3336 hm = LoadLibrary ("kernel32.dll");
3339 GPA (hm, DebugActiveProcessStop);
3340 GPA (hm, DebugBreakProcess);
3341 GPA (hm, DebugSetProcessKillOnExit);
3342 GPA (hm, GetConsoleFontSize);
3343 GPA (hm, DebugActiveProcessStop);
3344 GPA (hm, GetCurrentConsoleFont);
3347 /* Set variables to dummy versions of these processes if the function
3348 wasn't found in kernel32.dll. */
3349 if (!DebugBreakProcess)
3350 DebugBreakProcess = bad_DebugBreakProcess;
3351 if (!DebugActiveProcessStop || !DebugSetProcessKillOnExit)
3353 DebugActiveProcessStop = bad_DebugActiveProcessStop;
3354 DebugSetProcessKillOnExit = bad_DebugSetProcessKillOnExit;
3356 if (!GetConsoleFontSize)
3357 GetConsoleFontSize = bad_GetConsoleFontSize;
3358 if (!GetCurrentConsoleFont)
3359 GetCurrentConsoleFont = bad_GetCurrentConsoleFont;
3361 /* Load optional functions used for retrieving filename information
3362 associated with the currently debugged process or its dlls. */
3363 hm = LoadLibrary ("psapi.dll");
3366 GPA (hm, EnumProcessModules);
3367 GPA (hm, GetModuleInformation);
3368 GetModuleFileNameEx = (GetModuleFileNameEx_ftype *)
3369 GetProcAddress (hm, GetModuleFileNameEx_name);
3372 if (!EnumProcessModules || !GetModuleInformation || !GetModuleFileNameEx)
3374 /* Set variables to dummy versions of these processes if the function
3375 wasn't found in psapi.dll. */
3376 EnumProcessModules = bad_EnumProcessModules;
3377 GetModuleInformation = bad_GetModuleInformation;
3378 GetModuleFileNameEx = bad_GetModuleFileNameEx;
3379 /* This will probably fail on Windows 9x/Me. Let the user know
3380 that we're missing some functionality. */
3382 cannot automatically find executable file or library to read symbols.\n\
3383 Use \"file\" or \"dll\" command to load executable/libraries directly."));
3386 hm = LoadLibrary ("advapi32.dll");
3389 GPA (hm, OpenProcessToken);
3390 GPA (hm, LookupPrivilegeValueA);
3391 GPA (hm, AdjustTokenPrivileges);
3392 /* Only need to set one of these since if OpenProcessToken fails nothing
3394 if (!OpenProcessToken || !LookupPrivilegeValueA
3395 || !AdjustTokenPrivileges)
3396 OpenProcessToken = bad_OpenProcessToken;