/* GNU/Linux native-dependent code common to multiple platforms.
- Copyright (C) 2001-2012 Free Software Foundation, Inc.
+ Copyright (C) 2001-2014 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "inferior.h"
+#include "infrun.h"
#include "target.h"
-#include "gdb_string.h"
+#include "nat/linux-nat.h"
+#include "nat/linux-waitpid.h"
#include "gdb_wait.h"
-#include "gdb_assert.h"
#ifdef HAVE_TKILL_SYSCALL
#include <unistd.h>
#include <sys/syscall.h>
#endif
#include <sys/ptrace.h>
#include "linux-nat.h"
-#include "linux-ptrace.h"
-#include "linux-procfs.h"
+#include "nat/linux-ptrace.h"
+#include "nat/linux-procfs.h"
#include "linux-fork.h"
#include "gdbthread.h"
#include "gdbcmd.h"
#include "inf-child.h"
#include "inf-ptrace.h"
#include "auxv.h"
-#include <sys/param.h> /* for MAXPATHLEN */
#include <sys/procfs.h> /* for elf_gregset etc. */
#include "elf-bfd.h" /* for elfcore_write_* */
#include "gregset.h" /* for gregset */
#include "gdbcore.h" /* for get_exec_file */
#include <ctype.h> /* for isdigit */
-#include "gdbthread.h" /* for struct thread_info etc. */
-#include "gdb_stat.h" /* for struct stat */
+#include <sys/stat.h> /* for struct stat */
#include <fcntl.h> /* for O_RDONLY */
#include "inf-loop.h"
#include "event-loop.h"
#include "event-top.h"
#include <pwd.h>
#include <sys/types.h>
-#include "gdb_dirent.h"
+#include <dirent.h>
#include "xml-support.h"
-#include "terminal.h"
#include <sys/vfs.h>
#include "solib.h"
-#include "linux-osdata.h"
+#include "nat/linux-osdata.h"
#include "linux-tdep.h"
#include "symfile.h"
#include "agent.h"
#include "tracepoint.h"
-#include "exceptions.h"
-#include "linux-ptrace.h"
#include "buffer.h"
+#include "target-descriptions.h"
+#include "filestuff.h"
+#include "objfiles.h"
#ifndef SPUFS_MAGIC
#define SPUFS_MAGIC 0x23c9b64e
#define O_LARGEFILE 0
#endif
-/* Unlike other extended result codes, WSTOPSIG (status) on
- PTRACE_O_TRACESYSGOOD syscall events doesn't return SIGTRAP, but
- instead SIGTRAP with bit 7 set. */
-#define SYSCALL_SIGTRAP (SIGTRAP | 0x80)
-
/* The single-threaded native GNU/Linux target_ops. We save a pointer for
the use of the multi-threaded target. */
static struct target_ops *linux_ops;
/* The method to call, if any, when a new thread is attached. */
static void (*linux_nat_new_thread) (struct lwp_info *);
+/* The method to call, if any, when a new fork is attached. */
+static linux_nat_new_fork_ftype *linux_nat_new_fork;
+
+/* The method to call, if any, when a process is no longer
+ attached. */
+static linux_nat_forget_process_ftype *linux_nat_forget_process_hook;
+
/* Hook to call prior to resuming a thread. */
static void (*linux_nat_prepare_to_resume) (struct lwp_info *);
/* The saved to_xfer_partial method, inherited from inf-ptrace.c.
Called by our to_xfer_partial. */
-static LONGEST (*super_xfer_partial) (struct target_ops *,
- enum target_object,
- const char *, gdb_byte *,
- const gdb_byte *,
- ULONGEST, LONGEST);
+static target_xfer_partial_ftype *super_xfer_partial;
+
+/* The saved to_close method, inherited from inf-ptrace.c.
+ Called by our to_close. */
+static void (*super_close) (struct target_ops *);
-static int debug_linux_nat;
+static unsigned int debug_linux_nat;
static void
show_debug_linux_nat (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
};
struct simple_pid_list *stopped_pids;
-/* This variable is a tri-state flag: -1 for unknown, 0 if PTRACE_O_TRACEFORK
- can not be used, 1 if it can. */
-
-static int linux_supports_tracefork_flag = -1;
-
-/* This variable is a tri-state flag: -1 for unknown, 0 if
- PTRACE_O_TRACESYSGOOD can not be used, 1 if it can. */
-
-static int linux_supports_tracesysgood_flag = -1;
-
-/* If we have PTRACE_O_TRACEFORK, this flag indicates whether we also have
- PTRACE_O_TRACEVFORKDONE. */
-
-static int linux_supports_tracevforkdone_flag = -1;
-
-/* Stores the current used ptrace() options. */
-static int current_ptrace_options = 0;
-
/* Async mode support. */
/* The read/write ends of the pipe registered as waitable file in the
be awakened anyway. */
}
-static void linux_nat_async (void (*callback)
- (enum inferior_event_type event_type,
- void *context),
- void *context);
static int kill_lwp (int lwpid, int signo);
static int stop_callback (struct lwp_info *lp, void *data);
return 0;
}
-\f
-/* A helper function for linux_test_for_tracefork, called after fork (). */
-
-static void
-linux_tracefork_child (void)
-{
- ptrace (PTRACE_TRACEME, 0, 0, 0);
- kill (getpid (), SIGSTOP);
- fork ();
- _exit (0);
-}
-
-/* Wrapper function for waitpid which handles EINTR. */
-
-static int
-my_waitpid (int pid, int *statusp, int flags)
-{
- int ret;
-
- do
- {
- ret = waitpid (pid, statusp, flags);
- }
- while (ret == -1 && errno == EINTR);
-
- return ret;
-}
-
-/* Determine if PTRACE_O_TRACEFORK can be used to follow fork events.
-
- First, we try to enable fork tracing on ORIGINAL_PID. If this fails,
- we know that the feature is not available. This may change the tracing
- options for ORIGINAL_PID, but we'll be setting them shortly anyway.
-
- However, if it succeeds, we don't know for sure that the feature is
- available; old versions of PTRACE_SETOPTIONS ignored unknown options. We
- create a child process, attach to it, use PTRACE_SETOPTIONS to enable
- fork tracing, and let it fork. If the process exits, we assume that we
- can't use TRACEFORK; if we get the fork notification, and we can extract
- the new child's PID, then we assume that we can. */
-
-static void
-linux_test_for_tracefork (int original_pid)
-{
- int child_pid, ret, status;
- long second_pid;
- sigset_t prev_mask;
-
- /* We don't want those ptrace calls to be interrupted. */
- block_child_signals (&prev_mask);
-
- linux_supports_tracefork_flag = 0;
- linux_supports_tracevforkdone_flag = 0;
-
- ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACEFORK);
- if (ret != 0)
- {
- restore_child_signals_mask (&prev_mask);
- return;
- }
-
- child_pid = fork ();
- if (child_pid == -1)
- perror_with_name (("fork"));
-
- if (child_pid == 0)
- linux_tracefork_child ();
-
- ret = my_waitpid (child_pid, &status, 0);
- if (ret == -1)
- perror_with_name (("waitpid"));
- else if (ret != child_pid)
- error (_("linux_test_for_tracefork: waitpid: unexpected result %d."), ret);
- if (! WIFSTOPPED (status))
- error (_("linux_test_for_tracefork: waitpid: unexpected status %d."),
- status);
-
- ret = ptrace (PTRACE_SETOPTIONS, child_pid, 0, PTRACE_O_TRACEFORK);
- if (ret != 0)
- {
- ret = ptrace (PTRACE_KILL, child_pid, 0, 0);
- if (ret != 0)
- {
- warning (_("linux_test_for_tracefork: failed to kill child"));
- restore_child_signals_mask (&prev_mask);
- return;
- }
-
- ret = my_waitpid (child_pid, &status, 0);
- if (ret != child_pid)
- warning (_("linux_test_for_tracefork: failed "
- "to wait for killed child"));
- else if (!WIFSIGNALED (status))
- warning (_("linux_test_for_tracefork: unexpected "
- "wait status 0x%x from killed child"), status);
-
- restore_child_signals_mask (&prev_mask);
- return;
- }
-
- /* Check whether PTRACE_O_TRACEVFORKDONE is available. */
- ret = ptrace (PTRACE_SETOPTIONS, child_pid, 0,
- PTRACE_O_TRACEFORK | PTRACE_O_TRACEVFORKDONE);
- linux_supports_tracevforkdone_flag = (ret == 0);
-
- ret = ptrace (PTRACE_CONT, child_pid, 0, 0);
- if (ret != 0)
- warning (_("linux_test_for_tracefork: failed to resume child"));
-
- ret = my_waitpid (child_pid, &status, 0);
-
- if (ret == child_pid && WIFSTOPPED (status)
- && status >> 16 == PTRACE_EVENT_FORK)
- {
- second_pid = 0;
- ret = ptrace (PTRACE_GETEVENTMSG, child_pid, 0, &second_pid);
- if (ret == 0 && second_pid != 0)
- {
- int second_status;
-
- linux_supports_tracefork_flag = 1;
- my_waitpid (second_pid, &second_status, 0);
- ret = ptrace (PTRACE_KILL, second_pid, 0, 0);
- if (ret != 0)
- warning (_("linux_test_for_tracefork: "
- "failed to kill second child"));
- my_waitpid (second_pid, &status, 0);
- }
- }
- else
- warning (_("linux_test_for_tracefork: unexpected result from waitpid "
- "(%d, status 0x%x)"), ret, status);
-
- ret = ptrace (PTRACE_KILL, child_pid, 0, 0);
- if (ret != 0)
- warning (_("linux_test_for_tracefork: failed to kill child"));
- my_waitpid (child_pid, &status, 0);
-
- restore_child_signals_mask (&prev_mask);
-}
-
-/* Determine if PTRACE_O_TRACESYSGOOD can be used to follow syscalls.
-
- We try to enable syscall tracing on ORIGINAL_PID. If this fails,
- we know that the feature is not available. This may change the tracing
- options for ORIGINAL_PID, but we'll be setting them shortly anyway. */
-
-static void
-linux_test_for_tracesysgood (int original_pid)
-{
- int ret;
- sigset_t prev_mask;
-
- /* We don't want those ptrace calls to be interrupted. */
- block_child_signals (&prev_mask);
-
- linux_supports_tracesysgood_flag = 0;
-
- ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACESYSGOOD);
- if (ret != 0)
- goto out;
-
- linux_supports_tracesysgood_flag = 1;
-out:
- restore_child_signals_mask (&prev_mask);
-}
-
-/* Determine wether we support PTRACE_O_TRACESYSGOOD option available.
- This function also sets linux_supports_tracesysgood_flag. */
-
-static int
-linux_supports_tracesysgood (int pid)
-{
- if (linux_supports_tracesysgood_flag == -1)
- linux_test_for_tracesysgood (pid);
- return linux_supports_tracesysgood_flag;
-}
-
-/* Return non-zero iff we have tracefork functionality available.
- This function also sets linux_supports_tracefork_flag. */
-
-static int
-linux_supports_tracefork (int pid)
-{
- if (linux_supports_tracefork_flag == -1)
- linux_test_for_tracefork (pid);
- return linux_supports_tracefork_flag;
-}
-
-static int
-linux_supports_tracevforkdone (int pid)
-{
- if (linux_supports_tracefork_flag == -1)
- linux_test_for_tracefork (pid);
- return linux_supports_tracevforkdone_flag;
-}
+/* Initialize ptrace warnings and check for supported ptrace
+ features given PID. */
static void
-linux_enable_tracesysgood (ptid_t ptid)
-{
- int pid = ptid_get_lwp (ptid);
-
- if (pid == 0)
- pid = ptid_get_pid (ptid);
-
- if (linux_supports_tracesysgood (pid) == 0)
- return;
-
- current_ptrace_options |= PTRACE_O_TRACESYSGOOD;
-
- ptrace (PTRACE_SETOPTIONS, pid, 0, current_ptrace_options);
-}
-
-\f
-void
-linux_enable_event_reporting (ptid_t ptid)
+linux_init_ptrace (pid_t pid)
{
- int pid = ptid_get_lwp (ptid);
-
- if (pid == 0)
- pid = ptid_get_pid (ptid);
-
- if (! linux_supports_tracefork (pid))
- return;
-
- current_ptrace_options |= PTRACE_O_TRACEFORK | PTRACE_O_TRACEVFORK
- | PTRACE_O_TRACEEXEC | PTRACE_O_TRACECLONE;
-
- if (linux_supports_tracevforkdone (pid))
- current_ptrace_options |= PTRACE_O_TRACEVFORKDONE;
-
- /* Do not enable PTRACE_O_TRACEEXIT until GDB is more prepared to support
- read-only process state. */
-
- ptrace (PTRACE_SETOPTIONS, pid, 0, current_ptrace_options);
+ linux_enable_event_reporting (pid);
+ linux_ptrace_init_warnings ();
}
static void
-linux_child_post_attach (int pid)
+linux_child_post_attach (struct target_ops *self, int pid)
{
- linux_enable_event_reporting (pid_to_ptid (pid));
- linux_enable_tracesysgood (pid_to_ptid (pid));
+ linux_init_ptrace (pid);
}
static void
-linux_child_post_startup_inferior (ptid_t ptid)
+linux_child_post_startup_inferior (struct target_ops *self, ptid_t ptid)
{
- linux_enable_event_reporting (ptid);
- linux_enable_tracesysgood (ptid);
+ linux_init_ptrace (ptid_get_pid (ptid));
}
/* Return the number of known LWPs in the tgid given by PID. */
delete_lwp (lp->ptid);
}
+/* Target hook for follow_fork. On entry inferior_ptid must be the
+ ptid of the followed inferior. At return, inferior_ptid will be
+ unchanged. */
+
static int
-linux_child_follow_fork (struct target_ops *ops, int follow_child)
+linux_child_follow_fork (struct target_ops *ops, int follow_child,
+ int detach_fork)
{
- sigset_t prev_mask;
- int has_vforked;
- int parent_pid, child_pid;
-
- block_child_signals (&prev_mask);
-
- has_vforked = (inferior_thread ()->pending_follow.kind
- == TARGET_WAITKIND_VFORKED);
- parent_pid = ptid_get_lwp (inferior_ptid);
- if (parent_pid == 0)
- parent_pid = ptid_get_pid (inferior_ptid);
- child_pid = PIDGET (inferior_thread ()->pending_follow.value.related_pid);
-
- if (!detach_fork)
- linux_enable_event_reporting (pid_to_ptid (child_pid));
-
- if (has_vforked
- && !non_stop /* Non-stop always resumes both branches. */
- && (!target_is_async_p () || sync_execution)
- && !(follow_child || detach_fork || sched_multi))
- {
- /* The parent stays blocked inside the vfork syscall until the
- child execs or exits. If we don't let the child run, then
- the parent stays blocked. If we're telling the parent to run
- in the foreground, the user will not be able to ctrl-c to get
- back the terminal, effectively hanging the debug session. */
- fprintf_filtered (gdb_stderr, _("\
-Can not resume the parent process over vfork in the foreground while\n\
-holding the child stopped. Try \"set detach-on-fork\" or \
-\"set schedule-multiple\".\n"));
- /* FIXME output string > 80 columns. */
- return 1;
- }
-
- if (! follow_child)
+ if (!follow_child)
{
struct lwp_info *child_lp = NULL;
+ int status = W_STOPCODE (0);
+ struct cleanup *old_chain;
+ int has_vforked;
+ int parent_pid, child_pid;
+
+ has_vforked = (inferior_thread ()->pending_follow.kind
+ == TARGET_WAITKIND_VFORKED);
+ parent_pid = ptid_get_lwp (inferior_ptid);
+ if (parent_pid == 0)
+ parent_pid = ptid_get_pid (inferior_ptid);
+ child_pid
+ = ptid_get_pid (inferior_thread ()->pending_follow.value.related_pid);
+
/* We're already attached to the parent, by default. */
+ old_chain = save_inferior_ptid ();
+ inferior_ptid = ptid_build (child_pid, child_pid, 0);
+ child_lp = add_lwp (inferior_ptid);
+ child_lp->stopped = 1;
+ child_lp->last_resume_kind = resume_stop;
/* Detach new forked process? */
if (detach_fork)
{
- struct cleanup *old_chain;
-
- /* Before detaching from the child, remove all breakpoints
- from it. If we forked, then this has already been taken
- care of by infrun.c. If we vforked however, any
- breakpoint inserted in the parent is visible in the
- child, even those added while stopped in a vfork
- catchpoint. This will remove the breakpoints from the
- parent also, but they'll be reinserted below. */
- if (has_vforked)
- {
- /* keep breakpoints list in sync. */
- remove_breakpoints_pid (GET_PID (inferior_ptid));
- }
-
- if (info_verbose || debug_linux_nat)
- {
- target_terminal_ours ();
- fprintf_filtered (gdb_stdlog,
- "Detaching after fork from "
- "child process %d.\n",
- child_pid);
- }
-
- old_chain = save_inferior_ptid ();
- inferior_ptid = ptid_build (child_pid, child_pid, 0);
-
- child_lp = add_lwp (inferior_ptid);
- child_lp->stopped = 1;
- child_lp->last_resume_kind = resume_stop;
make_cleanup (delete_lwp_cleanup, child_lp);
- /* CHILD_LP has new PID, therefore linux_nat_new_thread is not called for it.
- See i386_inferior_data_get for the Linux kernel specifics.
- Ensure linux_nat_prepare_to_resume will reset the hardware debug
- registers. It is done by the linux_nat_new_thread call, which is
- being skipped in add_lwp above for the first lwp of a pid. */
- gdb_assert (num_lwps (GET_PID (child_lp->ptid)) == 1);
- if (linux_nat_new_thread != NULL)
- linux_nat_new_thread (child_lp);
-
if (linux_nat_prepare_to_resume != NULL)
linux_nat_prepare_to_resume (child_lp);
- ptrace (PTRACE_DETACH, child_pid, 0, 0);
-
- do_cleanups (old_chain);
- }
- else
- {
- struct inferior *parent_inf, *child_inf;
- struct cleanup *old_chain;
-
- /* Add process to GDB's tables. */
- child_inf = add_inferior (child_pid);
- parent_inf = current_inferior ();
- child_inf->attach_flag = parent_inf->attach_flag;
- copy_terminal_info (child_inf, parent_inf);
+ /* When debugging an inferior in an architecture that supports
+ hardware single stepping on a kernel without commit
+ 6580807da14c423f0d0a708108e6df6ebc8bc83d, the vfork child
+ process starts with the TIF_SINGLESTEP/X86_EFLAGS_TF bits
+ set if the parent process had them set.
+ To work around this, single step the child process
+ once before detaching to clear the flags. */
- old_chain = save_inferior_ptid ();
- save_current_program_space ();
-
- inferior_ptid = ptid_build (child_pid, child_pid, 0);
- add_thread (inferior_ptid);
- child_lp = add_lwp (inferior_ptid);
- child_lp->stopped = 1;
- child_lp->last_resume_kind = resume_stop;
- child_inf->symfile_flags = SYMFILE_NO_READ;
-
- /* If this is a vfork child, then the address-space is
- shared with the parent. */
- if (has_vforked)
+ if (!gdbarch_software_single_step_p (target_thread_architecture
+ (child_lp->ptid)))
{
- child_inf->pspace = parent_inf->pspace;
- child_inf->aspace = parent_inf->aspace;
-
- /* The parent will be frozen until the child is done
- with the shared region. Keep track of the
- parent. */
- child_inf->vfork_parent = parent_inf;
- child_inf->pending_detach = 0;
- parent_inf->vfork_child = child_inf;
- parent_inf->pending_detach = 0;
+ linux_disable_event_reporting (child_pid);
+ if (ptrace (PTRACE_SINGLESTEP, child_pid, 0, 0) < 0)
+ perror_with_name (_("Couldn't do single step"));
+ if (my_waitpid (child_pid, &status, 0) < 0)
+ perror_with_name (_("Couldn't wait vfork process"));
}
- else
+
+ if (WIFSTOPPED (status))
{
- child_inf->aspace = new_address_space ();
- child_inf->pspace = add_program_space (child_inf->aspace);
- child_inf->removable = 1;
- set_current_program_space (child_inf->pspace);
- clone_program_space (child_inf->pspace, parent_inf->pspace);
-
- /* Let the shared library layer (solib-svr4) learn about
- this new process, relocate the cloned exec, pull in
- shared libraries, and install the solib event
- breakpoint. If a "cloned-VM" event was propagated
- better throughout the core, this wouldn't be
- required. */
- solib_create_inferior_hook (0);
+ int signo;
+
+ signo = WSTOPSIG (status);
+ if (signo != 0
+ && !signal_pass_state (gdb_signal_from_host (signo)))
+ signo = 0;
+ ptrace (PTRACE_DETACH, child_pid, 0, signo);
}
+ /* Resets value of inferior_ptid to parent ptid. */
+ do_cleanups (old_chain);
+ }
+ else
+ {
/* Let the thread_db layer learn about this new process. */
check_for_thread_db ();
-
- do_cleanups (old_chain);
}
+ do_cleanups (old_chain);
+
if (has_vforked)
{
struct lwp_info *parent_lp;
- struct inferior *parent_inf;
-
- parent_inf = current_inferior ();
-
- /* If we detached from the child, then we have to be careful
- to not insert breakpoints in the parent until the child
- is done with the shared memory region. However, if we're
- staying attached to the child, then we can and should
- insert breakpoints, so that we can debug it. A
- subsequent child exec or exit is enough to know when does
- the child stops using the parent's address space. */
- parent_inf->waiting_for_vfork_done = detach_fork;
- parent_inf->pspace->breakpoints_not_allowed = detach_fork;
parent_lp = find_lwp_pid (pid_to_ptid (parent_pid));
- gdb_assert (linux_supports_tracefork_flag >= 0);
+ gdb_assert (linux_supports_tracefork () >= 0);
- if (linux_supports_tracevforkdone (0))
+ if (linux_supports_tracevforkdone ())
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
}
else
{
- struct inferior *parent_inf, *child_inf;
struct lwp_info *child_lp;
- struct program_space *parent_pspace;
-
- if (info_verbose || debug_linux_nat)
- {
- target_terminal_ours ();
- if (has_vforked)
- fprintf_filtered (gdb_stdlog,
- _("Attaching after process %d "
- "vfork to child process %d.\n"),
- parent_pid, child_pid);
- else
- fprintf_filtered (gdb_stdlog,
- _("Attaching after process %d "
- "fork to child process %d.\n"),
- parent_pid, child_pid);
- }
-
- /* Add the new inferior first, so that the target_detach below
- doesn't unpush the target. */
-
- child_inf = add_inferior (child_pid);
-
- parent_inf = current_inferior ();
- child_inf->attach_flag = parent_inf->attach_flag;
- copy_terminal_info (child_inf, parent_inf);
-
- parent_pspace = parent_inf->pspace;
-
- /* If we're vforking, we want to hold on to the parent until the
- child exits or execs. At child exec or exit time we can
- remove the old breakpoints from the parent and detach or
- resume debugging it. Otherwise, detach the parent now; we'll
- want to reuse it's program/address spaces, but we can't set
- them to the child before removing breakpoints from the
- parent, otherwise, the breakpoints module could decide to
- remove breakpoints from the wrong process (since they'd be
- assigned to the same address space). */
- if (has_vforked)
- {
- gdb_assert (child_inf->vfork_parent == NULL);
- gdb_assert (parent_inf->vfork_child == NULL);
- child_inf->vfork_parent = parent_inf;
- child_inf->pending_detach = 0;
- parent_inf->vfork_child = child_inf;
- parent_inf->pending_detach = detach_fork;
- parent_inf->waiting_for_vfork_done = 0;
- }
- else if (detach_fork)
- target_detach (NULL, 0);
-
- /* Note that the detach above makes PARENT_INF dangling. */
-
- /* Add the child thread to the appropriate lists, and switch to
- this new thread, before cloning the program space, and
- informing the solib layer about this new process. */
-
- inferior_ptid = ptid_build (child_pid, child_pid, 0);
- add_thread (inferior_ptid);
child_lp = add_lwp (inferior_ptid);
child_lp->stopped = 1;
child_lp->last_resume_kind = resume_stop;
- /* If this is a vfork child, then the address-space is shared
- with the parent. If we detached from the parent, then we can
- reuse the parent's program/address spaces. */
- if (has_vforked || detach_fork)
- {
- child_inf->pspace = parent_pspace;
- child_inf->aspace = child_inf->pspace->aspace;
- }
- else
- {
- child_inf->aspace = new_address_space ();
- child_inf->pspace = add_program_space (child_inf->aspace);
- child_inf->removable = 1;
- child_inf->symfile_flags = SYMFILE_NO_READ;
- set_current_program_space (child_inf->pspace);
- clone_program_space (child_inf->pspace, parent_pspace);
-
- /* Let the shared library layer (solib-svr4) learn about
- this new process, relocate the cloned exec, pull in
- shared libraries, and install the solib event breakpoint.
- If a "cloned-VM" event was propagated better throughout
- the core, this wouldn't be required. */
- solib_create_inferior_hook (0);
- }
-
/* Let the thread_db layer learn about this new process. */
check_for_thread_db ();
}
- restore_child_signals_mask (&prev_mask);
return 0;
}
\f
static int
-linux_child_insert_fork_catchpoint (int pid)
+linux_child_insert_fork_catchpoint (struct target_ops *self, int pid)
{
- return !linux_supports_tracefork (pid);
+ return !linux_supports_tracefork ();
}
static int
-linux_child_remove_fork_catchpoint (int pid)
+linux_child_remove_fork_catchpoint (struct target_ops *self, int pid)
{
return 0;
}
static int
-linux_child_insert_vfork_catchpoint (int pid)
+linux_child_insert_vfork_catchpoint (struct target_ops *self, int pid)
{
- return !linux_supports_tracefork (pid);
+ return !linux_supports_tracefork ();
}
static int
-linux_child_remove_vfork_catchpoint (int pid)
+linux_child_remove_vfork_catchpoint (struct target_ops *self, int pid)
{
return 0;
}
static int
-linux_child_insert_exec_catchpoint (int pid)
+linux_child_insert_exec_catchpoint (struct target_ops *self, int pid)
{
- return !linux_supports_tracefork (pid);
+ return !linux_supports_tracefork ();
}
static int
-linux_child_remove_exec_catchpoint (int pid)
+linux_child_remove_exec_catchpoint (struct target_ops *self, int pid)
{
return 0;
}
static int
-linux_child_set_syscall_catchpoint (int pid, int needed, int any_count,
+linux_child_set_syscall_catchpoint (struct target_ops *self,
+ int pid, int needed, int any_count,
int table_size, int *table)
{
- if (!linux_supports_tracesysgood (pid))
+ if (!linux_supports_tracesysgood ())
return 1;
/* On GNU/Linux, we ignore the arguments. It means that we only
/* Update signals to pass to the inferior. */
static void
-linux_nat_pass_signals (int numsigs, unsigned char *pass_signals)
+linux_nat_pass_signals (struct target_ops *self,
+ int numsigs, unsigned char *pass_signals)
{
int signo;
/* Prototypes for local functions. */
static int stop_wait_callback (struct lwp_info *lp, void *data);
static int linux_thread_alive (ptid_t ptid);
-static char *linux_child_pid_to_exec_file (int pid);
+static char *linux_child_pid_to_exec_file (struct target_ops *self, int pid);
\f
-/* Convert wait status STATUS to a string. Used for printing debug
- messages only. */
-
-static char *
-status_to_str (int status)
-{
- static char buf[64];
-
- if (WIFSTOPPED (status))
- {
- if (WSTOPSIG (status) == SYSCALL_SIGTRAP)
- snprintf (buf, sizeof (buf), "%s (stopped at syscall)",
- strsignal (SIGTRAP));
- else
- snprintf (buf, sizeof (buf), "%s (stopped)",
- strsignal (WSTOPSIG (status)));
- }
- else if (WIFSIGNALED (status))
- snprintf (buf, sizeof (buf), "%s (terminated)",
- strsignal (WTERMSIG (status)));
- else
- snprintf (buf, sizeof (buf), "%d (exited)", WEXITSTATUS (status));
-
- return buf;
-}
/* Destroy and free LP. */
}
}
-/* Add the LWP specified by PID to the list. Return a pointer to the
- structure describing the new LWP. The LWP should already be stopped
- (with an exception for the very first LWP). */
+/* Add the LWP specified by PTID to the list. PTID is the first LWP
+ in the process. Return a pointer to the structure describing the
+ new LWP.
+
+ This differs from add_lwp in that we don't let the arch specific
+ bits know about this new thread. Current clients of this callback
+ take the opportunity to install watchpoints in the new thread, and
+ we shouldn't do that for the first thread. If we're spawning a
+ child ("run"), the thread executes the shell wrapper first, and we
+ shouldn't touch it until it execs the program we want to debug.
+ For "attach", it'd be okay to call the callback, but it's not
+ necessary, because watchpoints can't yet have been inserted into
+ the inferior. */
static struct lwp_info *
-add_lwp (ptid_t ptid)
+add_initial_lwp (ptid_t ptid)
{
struct lwp_info *lp;
- gdb_assert (is_lwp (ptid));
+ gdb_assert (ptid_lwp_p (ptid));
lp = (struct lwp_info *) xmalloc (sizeof (struct lwp_info));
lp->next = lwp_list;
lwp_list = lp;
+ return lp;
+}
+
+/* Add the LWP specified by PID to the list. Return a pointer to the
+ structure describing the new LWP. The LWP should already be
+ stopped. */
+
+static struct lwp_info *
+add_lwp (ptid_t ptid)
+{
+ struct lwp_info *lp;
+
+ lp = add_initial_lwp (ptid);
+
/* Let the arch specific bits know about this new thread. Current
clients of this callback take the opportunity to install
- watchpoints in the new thread. Don't do this for the first
- thread though. If we're spawning a child ("run"), the thread
- executes the shell wrapper first, and we shouldn't touch it until
- it execs the program we want to debug. For "attach", it'd be
- okay to call the callback, but it's not necessary, because
- watchpoints can't yet have been inserted into the inferior. */
- if (num_lwps (GET_PID (ptid)) > 1 && linux_nat_new_thread != NULL)
+ watchpoints in the new thread. We don't do this for the first
+ thread though. See add_initial_lwp. */
+ if (linux_nat_new_thread != NULL)
linux_nat_new_thread (lp);
return lp;
struct lwp_info *lp;
int lwp;
- if (is_lwp (ptid))
- lwp = GET_LWP (ptid);
+ if (ptid_lwp_p (ptid))
+ lwp = ptid_get_lwp (ptid);
else
- lwp = GET_PID (ptid);
+ lwp = ptid_get_pid (ptid);
for (lp = lwp_list; lp; lp = lp->next)
- if (lwp == GET_LWP (lp->ptid))
+ if (lwp == ptid_get_lwp (lp->ptid))
return lp;
return NULL;
return NULL;
}
-/* Iterate like iterate_over_lwps does except when forking-off a child call
- CALLBACK with CALLBACK_DATA specifically only for that new child PID. */
-
-void
-linux_nat_iterate_watchpoint_lwps
- (linux_nat_iterate_watchpoint_lwps_ftype callback, void *callback_data)
-{
- int inferior_pid = ptid_get_pid (inferior_ptid);
- struct inferior *inf = current_inferior ();
-
- if (inf->pid == inferior_pid)
- {
- /* Iterate all the threads of the current inferior. Without specifying
- INFERIOR_PID it would iterate all threads of all inferiors, which is
- inappropriate for watchpoints. */
-
- iterate_over_lwps (pid_to_ptid (inferior_pid), callback, callback_data);
- }
- else
- {
- /* Detaching a new child PID temporarily present in INFERIOR_PID. */
-
- struct lwp_info *child_lp;
- struct cleanup *old_chain;
- pid_t child_pid = GET_PID (inferior_ptid);
- ptid_t child_ptid = ptid_build (child_pid, child_pid, 0);
-
- gdb_assert (!is_lwp (inferior_ptid));
- gdb_assert (find_lwp_pid (child_ptid) == NULL);
- child_lp = add_lwp (child_ptid);
- child_lp->stopped = 1;
- child_lp->last_resume_kind = resume_stop;
- old_chain = make_cleanup (delete_lwp_cleanup, child_lp);
-
- callback (child_lp, callback_data);
-
- do_cleanups (old_chain);
- }
-}
-
/* Update our internal state when changing from one checkpoint to
another indicated by NEW_PTID. We can only switch single-threaded
applications, so we only create one new LWP, and the previous list
{
struct lwp_info *lp;
- purge_lwp_list (GET_PID (inferior_ptid));
+ purge_lwp_list (ptid_get_pid (inferior_ptid));
lp = add_lwp (new_ptid);
lp->stopped = 1;
linux_nat_post_attach_wait (ptid_t ptid, int first, int *cloned,
int *signalled)
{
- pid_t new_pid, pid = GET_LWP (ptid);
+ pid_t new_pid, pid = ptid_get_lwp (ptid);
int status;
if (linux_proc_pid_is_stopped (pid))
lin_lwp_attach_lwp (ptid_t ptid)
{
struct lwp_info *lp;
- sigset_t prev_mask;
int lwpid;
- gdb_assert (is_lwp (ptid));
-
- block_child_signals (&prev_mask);
+ gdb_assert (ptid_lwp_p (ptid));
lp = find_lwp_pid (ptid);
- lwpid = GET_LWP (ptid);
+ lwpid = ptid_get_lwp (ptid);
/* We assume that we're already attached to any LWP that has an id
equal to the overall process id, and to any LWP that is already
and we've had PID wraparound since we last tried to stop all threads,
this assumption might be wrong; fortunately, this is very unlikely
to happen. */
- if (lwpid != GET_PID (ptid) && lp == NULL)
+ if (lwpid != ptid_get_pid (ptid) && lp == NULL)
{
int status, cloned = 0, signalled = 0;
if (ptrace (PTRACE_ATTACH, lwpid, 0, 0) < 0)
{
- if (linux_supports_tracefork_flag)
+ if (linux_supports_tracefork ())
{
/* If we haven't stopped all threads when we get here,
we may have seen a thread listed in thread_db's list,
/* We've already seen this thread stop, but we
haven't seen the PTRACE_EVENT_CLONE extended
event yet. */
- restore_child_signals_mask (&prev_mask);
return 0;
}
else
{
if (WIFSTOPPED (status))
add_to_pid_list (&stopped_pids, lwpid, status);
-
- restore_child_signals_mask (&prev_mask);
return 1;
}
}
to create them. */
warning (_("Can't attach %s: %s"), target_pid_to_str (ptid),
safe_strerror (errno));
- restore_child_signals_mask (&prev_mask);
return -1;
}
status = linux_nat_post_attach_wait (ptid, 0, &cloned, &signalled);
if (!WIFSTOPPED (status))
- {
- restore_child_signals_mask (&prev_mask);
- return 1;
- }
+ return 1;
lp = add_lwp (ptid);
lp->stopped = 1;
lp->status = status;
}
- target_post_attach (GET_LWP (lp->ptid));
+ target_post_attach (ptid_get_lwp (lp->ptid));
if (debug_linux_nat)
{
}
lp->last_resume_kind = resume_stop;
- restore_child_signals_mask (&prev_mask);
return 0;
}
#endif /* HAVE_PERSONALITY */
/* Make sure we report all signals during startup. */
- linux_nat_pass_signals (0, NULL);
+ linux_nat_pass_signals (ops, 0, NULL);
linux_ops->to_create_inferior (ops, exec_file, allargs, env, from_tty);
}
static void
-linux_nat_attach (struct target_ops *ops, char *args, int from_tty)
+linux_nat_attach (struct target_ops *ops, const char *args, int from_tty)
{
struct lwp_info *lp;
int status;
volatile struct gdb_exception ex;
/* Make sure we report all signals during attach. */
- linux_nat_pass_signals (0, NULL);
+ linux_nat_pass_signals (ops, 0, NULL);
TRY_CATCH (ex, RETURN_MASK_ERROR)
{
make_cleanup (xfree, message);
buffer_init (&buffer);
- linux_ptrace_attach_warnings (pid, &buffer);
+ linux_ptrace_attach_fail_reason (pid, &buffer);
buffer_grow_str0 (&buffer, "");
buffer_s = buffer_finish (&buffer);
make_cleanup (xfree, buffer_s);
- throw_error (ex.error, "%s%s", buffer_s, message);
+ if (*buffer_s != '\0')
+ throw_error (ex.error, "warning: %s\n%s", buffer_s, message);
+ else
+ throw_error (ex.error, "%s", message);
}
/* The ptrace base target adds the main thread with (pid,0,0)
format. Decorate it with lwp info. */
- ptid = BUILD_LWP (GET_PID (inferior_ptid), GET_PID (inferior_ptid));
+ ptid = ptid_build (ptid_get_pid (inferior_ptid),
+ ptid_get_pid (inferior_ptid),
+ 0);
thread_change_ptid (inferior_ptid, ptid);
/* Add the initial process as the first LWP to the list. */
- lp = add_lwp (ptid);
+ lp = add_initial_lwp (ptid);
status = linux_nat_post_attach_wait (lp->ptid, 1, &lp->cloned,
&lp->signalled);
internal_error (__FILE__, __LINE__,
_("unexpected status %d for PID %ld"),
- status, (long) GET_LWP (ptid));
+ status, (long) ptid_get_lwp (ptid));
}
lp->stopped = 1;
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LNA: waitpid %ld, saving status %s\n",
- (long) GET_PID (lp->ptid), status_to_str (status));
+ (long) ptid_get_pid (lp->ptid), status_to_str (status));
lp->status = status;
get_last_target_status (&last_ptid, &last);
- if (GET_LWP (lp->ptid) == GET_LWP (last_ptid))
+ if (ptid_get_lwp (lp->ptid) == ptid_get_lwp (last_ptid))
{
struct thread_info *tp = find_thread_ptid (lp->ptid);
"DC: Sending SIGCONT to %s\n",
target_pid_to_str (lp->ptid));
- kill_lwp (GET_LWP (lp->ptid), SIGCONT);
+ kill_lwp (ptid_get_lwp (lp->ptid), SIGCONT);
lp->signalled = 0;
}
/* We don't actually detach from the LWP that has an id equal to the
overall process id just yet. */
- if (GET_LWP (lp->ptid) != GET_PID (lp->ptid))
+ if (ptid_get_lwp (lp->ptid) != ptid_get_pid (lp->ptid))
{
int status = 0;
if (linux_nat_prepare_to_resume != NULL)
linux_nat_prepare_to_resume (lp);
errno = 0;
- if (ptrace (PTRACE_DETACH, GET_LWP (lp->ptid), 0,
+ if (ptrace (PTRACE_DETACH, ptid_get_lwp (lp->ptid), 0,
WSTOPSIG (status)) < 0)
error (_("Can't detach %s: %s"), target_pid_to_str (lp->ptid),
safe_strerror (errno));
}
static void
-linux_nat_detach (struct target_ops *ops, char *args, int from_tty)
+linux_nat_detach (struct target_ops *ops, const char *args, int from_tty)
{
int pid;
int status;
struct lwp_info *main_lwp;
- pid = GET_PID (inferior_ptid);
+ pid = ptid_get_pid (inferior_ptid);
- if (target_can_async_p ())
- linux_nat_async (NULL, 0);
+ /* Don't unregister from the event loop, as there may be other
+ inferiors running. */
/* Stop all threads before detaching. ptrace requires that the
thread is stopped to sucessfully detach. */
iterate_over_lwps (pid_to_ptid (pid), detach_callback, NULL);
/* Only the initial process should be left right now. */
- gdb_assert (num_lwps (GET_PID (inferior_ptid)) == 1);
+ gdb_assert (num_lwps (ptid_get_pid (inferior_ptid)) == 1);
main_lwp = find_lwp_pid (pid_to_ptid (pid));
&& get_pending_status (main_lwp, &status) != -1
&& WIFSTOPPED (status))
{
+ char *tem;
+
/* Put the signal number in ARGS so that inf_ptrace_detach will
pass it along with PTRACE_DETACH. */
- args = alloca (8);
- sprintf (args, "%d", (int) WSTOPSIG (status));
+ tem = alloca (8);
+ xsnprintf (tem, 8, "%d", (int) WSTOPSIG (status));
+ args = tem;
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LND: Sending signal %s to %s\n",
the current fork, and context-switch to the first
available. */
linux_fork_detach (args, from_tty);
-
- if (non_stop && target_can_async_p ())
- target_async (inferior_event_handler, 0);
}
else
linux_ops->to_detach (ops, args, from_tty);
{
if (lp->stopped)
{
- struct inferior *inf = find_inferior_pid (GET_PID (lp->ptid));
+ struct inferior *inf = find_inferior_pid (ptid_get_pid (lp->ptid));
if (inf->vfork_child != NULL)
{
if (linux_nat_prepare_to_resume != NULL)
linux_nat_prepare_to_resume (lp);
linux_ops->to_resume (linux_ops,
- pid_to_ptid (GET_LWP (lp->ptid)),
+ pid_to_ptid (ptid_get_lwp (lp->ptid)),
step, signo);
lp->stopped = 0;
lp->step = step;
- memset (&lp->siginfo, 0, sizeof (lp->siginfo));
lp->stopped_by_watchpoint = 0;
}
else
}
}
-/* Resume LWP, with the last stop signal, if it is in pass state. */
+/* Callback for iterate_over_lwps. If LWP is EXCEPT, do nothing.
+ Resume LWP with the last stop signal, if it is in pass state. */
static int
-linux_nat_resume_callback (struct lwp_info *lp, void *data)
+linux_nat_resume_callback (struct lwp_info *lp, void *except)
{
enum gdb_signal signo = GDB_SIGNAL_0;
+ if (lp == except)
+ return 0;
+
if (lp->stopped)
{
struct thread_info *thread;
thread = find_thread_ptid (lp->ptid);
if (thread != NULL)
{
- if (signal_pass_state (thread->suspend.stop_signal))
- signo = thread->suspend.stop_signal;
+ signo = thread->suspend.stop_signal;
thread->suspend.stop_signal = GDB_SIGNAL_0;
}
}
linux_nat_resume (struct target_ops *ops,
ptid_t ptid, int step, enum gdb_signal signo)
{
- sigset_t prev_mask;
struct lwp_info *lp;
int resume_many;
? strsignal (gdb_signal_to_host (signo)) : "0"),
target_pid_to_str (inferior_ptid));
- block_child_signals (&prev_mask);
-
/* A specific PTID means `step only this process id'. */
resume_many = (ptid_equal (minus_one_ptid, ptid)
|| ptid_is_pid (ptid));
"LLR: Short circuiting for status 0x%x\n",
lp->status);
- restore_child_signals_mask (&prev_mask);
if (target_can_async_p ())
{
target_async (inferior_event_handler, 0);
return;
}
- /* Mark LWP as not stopped to prevent it from being continued by
- linux_nat_resume_callback. */
- lp->stopped = 0;
-
if (resume_many)
- iterate_over_lwps (ptid, linux_nat_resume_callback, NULL);
+ iterate_over_lwps (ptid, linux_nat_resume_callback, lp);
/* Convert to something the lower layer understands. */
- ptid = pid_to_ptid (GET_LWP (lp->ptid));
+ ptid = pid_to_ptid (ptid_get_lwp (lp->ptid));
if (linux_nat_prepare_to_resume != NULL)
linux_nat_prepare_to_resume (lp);
linux_ops->to_resume (linux_ops, ptid, step, signo);
- memset (&lp->siginfo, 0, sizeof (lp->siginfo));
lp->stopped_by_watchpoint = 0;
+ lp->stopped = 0;
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
(signo != GDB_SIGNAL_0
? strsignal (gdb_signal_to_host (signo)) : "0"));
- restore_child_signals_mask (&prev_mask);
if (target_can_async_p ())
target_async (inferior_event_handler, 0);
}
"for LWP %ld (stopping threads), "
"resuming with PTRACE_CONT for SIGSTOP\n",
syscall_number,
- GET_LWP (lp->ptid));
+ ptid_get_lwp (lp->ptid));
lp->syscall_state = TARGET_WAITKIND_IGNORE;
- ptrace (PTRACE_CONT, GET_LWP (lp->ptid), 0, 0);
+ ptrace (PTRACE_CONT, ptid_get_lwp (lp->ptid), 0, 0);
+ lp->stopped = 0;
return 1;
}
== TARGET_WAITKIND_SYSCALL_ENTRY
? "entry" : "return",
syscall_number,
- GET_LWP (lp->ptid));
+ ptid_get_lwp (lp->ptid));
return 0;
}
lp->syscall_state == TARGET_WAITKIND_SYSCALL_ENTRY
? "entry" : "return",
syscall_number,
- GET_LWP (lp->ptid));
+ ptid_get_lwp (lp->ptid));
}
else
{
"with no syscall catchpoints."
" %d for LWP %ld, ignoring\n",
syscall_number,
- GET_LWP (lp->ptid));
+ ptid_get_lwp (lp->ptid));
lp->syscall_state = TARGET_WAITKIND_IGNORE;
}
registers_changed ();
if (linux_nat_prepare_to_resume != NULL)
linux_nat_prepare_to_resume (lp);
- linux_ops->to_resume (linux_ops, pid_to_ptid (GET_LWP (lp->ptid)),
+ linux_ops->to_resume (linux_ops, pid_to_ptid (ptid_get_lwp (lp->ptid)),
lp->step, GDB_SIGNAL_0);
+ lp->stopped = 0;
return 1;
}
linux_handle_extended_wait (struct lwp_info *lp, int status,
int stopping)
{
- int pid = GET_LWP (lp->ptid);
+ int pid = ptid_get_lwp (lp->ptid);
struct target_waitstatus *ourstatus = &lp->waitstatus;
- int event = status >> 16;
+ int event = linux_ptrace_get_extended_event (status);
if (event == PTRACE_EVENT_FORK || event == PTRACE_EVENT_VFORK
|| event == PTRACE_EVENT_CLONE)
ourstatus->value.related_pid = ptid_build (new_pid, new_pid, 0);
+ if (event == PTRACE_EVENT_FORK || event == PTRACE_EVENT_VFORK)
+ {
+ /* The arch-specific native code may need to know about new
+ forks even if those end up never mapped to an
+ inferior. */
+ if (linux_nat_new_fork != NULL)
+ linux_nat_new_fork (lp, new_pid);
+ }
+
if (event == PTRACE_EVENT_FORK
- && linux_fork_checkpointing_p (GET_PID (lp->ptid)))
+ && linux_fork_checkpointing_p (ptid_get_pid (lp->ptid)))
{
/* Handle checkpointing by linux-fork.c here as a special
case. We don't want the follow-fork-mode or 'catch fork'
/* This won't actually modify the breakpoint list, but will
physically remove the breakpoints from the child. */
- detach_breakpoints (new_pid);
+ detach_breakpoints (ptid_build (new_pid, new_pid, 0));
/* Retain child fork in ptrace (stopped) state. */
if (!find_fork_pid (new_pid))
this fork. We're actually doing an infcall in
linux-fork.c. */
ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
- linux_enable_event_reporting (pid_to_ptid (new_pid));
/* Report the stop to the core. */
return 0;
"from LWP %d, new child is LWP %ld\n",
pid, new_pid);
- new_lp = add_lwp (BUILD_LWP (new_pid, GET_PID (lp->ptid)));
+ new_lp = add_lwp (ptid_build (ptid_get_pid (lp->ptid), new_pid, 0));
new_lp->cloned = 1;
new_lp->stopped = 1;
{
/* We're not using thread_db. Add it to GDB's
list. */
- target_post_attach (GET_LWP (new_lp->ptid));
+ target_post_attach (ptid_get_lwp (new_lp->ptid));
add_thread (new_lp->ptid);
}
fprintf_unfiltered (gdb_stdlog,
"LHEW: waitpid of new LWP %ld, "
"saving status %s\n",
- (long) GET_LWP (new_lp->ptid),
+ (long) ptid_get_lwp (new_lp->ptid),
status_to_str (status));
new_lp->status = status;
}
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LHEW: resuming new LWP %ld\n",
- GET_LWP (new_lp->ptid));
+ ptid_get_lwp (new_lp->ptid));
if (linux_nat_prepare_to_resume != NULL)
linux_nat_prepare_to_resume (new_lp);
linux_ops->to_resume (linux_ops, pid_to_ptid (new_pid),
"LHEW: resuming parent LWP %d\n", pid);
if (linux_nat_prepare_to_resume != NULL)
linux_nat_prepare_to_resume (lp);
- linux_ops->to_resume (linux_ops, pid_to_ptid (GET_LWP (lp->ptid)),
+ linux_ops->to_resume (linux_ops,
+ pid_to_ptid (ptid_get_lwp (lp->ptid)),
0, GDB_SIGNAL_0);
-
+ lp->stopped = 0;
return 1;
}
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LHEW: Got exec event from LWP %ld\n",
- GET_LWP (lp->ptid));
+ ptid_get_lwp (lp->ptid));
ourstatus->kind = TARGET_WAITKIND_EXECD;
ourstatus->value.execd_pathname
- = xstrdup (linux_child_pid_to_exec_file (pid));
+ = xstrdup (linux_child_pid_to_exec_file (NULL, pid));
return 0;
}
fprintf_unfiltered (gdb_stdlog,
"LHEW: Got expected PTRACE_EVENT_"
"VFORK_DONE from LWP %ld: stopping\n",
- GET_LWP (lp->ptid));
+ ptid_get_lwp (lp->ptid));
ourstatus->kind = TARGET_WAITKIND_VFORK_DONE;
return 0;
fprintf_unfiltered (gdb_stdlog,
"LHEW: Got PTRACE_EVENT_VFORK_DONE "
"from LWP %ld: resuming\n",
- GET_LWP (lp->ptid));
- ptrace (PTRACE_CONT, GET_LWP (lp->ptid), 0, 0);
+ ptid_get_lwp (lp->ptid));
+ ptrace (PTRACE_CONT, ptid_get_lwp (lp->ptid), 0, 0);
return 1;
}
/* If my_waitpid returns 0 it means the __WCLONE vs. non-__WCLONE kind
was right and we should just call sigsuspend. */
- pid = my_waitpid (GET_LWP (lp->ptid), &status, WNOHANG);
+ pid = my_waitpid (ptid_get_lwp (lp->ptid), &status, WNOHANG);
if (pid == -1 && errno == ECHILD)
- pid = my_waitpid (GET_LWP (lp->ptid), &status, __WCLONE | WNOHANG);
+ pid = my_waitpid (ptid_get_lwp (lp->ptid), &status, __WCLONE | WNOHANG);
if (pid == -1 && errno == ECHILD)
{
/* The thread has previously exited. We need to delete it
Therefore always use WNOHANG with sigsuspend - it is equivalent to
waiting waitpid but linux_proc_pid_is_zombie is safe this way. */
- if (GET_PID (lp->ptid) == GET_LWP (lp->ptid)
- && linux_proc_pid_is_zombie (GET_LWP (lp->ptid)))
+ if (ptid_get_pid (lp->ptid) == ptid_get_lwp (lp->ptid)
+ && linux_proc_pid_is_zombie (ptid_get_lwp (lp->ptid)))
{
thread_dead = 1;
if (debug_linux_nat)
again before it gets to sigsuspend so we can safely let the handlers
get executed here. */
+ if (debug_linux_nat)
+ fprintf_unfiltered (gdb_stdlog, "WL: about to sigsuspend\n");
sigsuspend (&suspend_mask);
}
if (!thread_dead)
{
- gdb_assert (pid == GET_LWP (lp->ptid));
+ gdb_assert (pid == ptid_get_lwp (lp->ptid));
if (debug_linux_nat)
{
}
gdb_assert (WIFSTOPPED (status));
+ lp->stopped = 1;
/* Handle GNU/Linux's syscall SIGTRAPs. */
if (WIFSTOPPED (status) && WSTOPSIG (status) == SYSCALL_SIGTRAP)
}
/* Handle GNU/Linux's extended waitstatus for trace events. */
- if (WIFSTOPPED (status) && WSTOPSIG (status) == SIGTRAP && status >> 16 != 0)
+ if (WIFSTOPPED (status) && WSTOPSIG (status) == SIGTRAP
+ && linux_is_extended_waitstatus (status))
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
return status;
}
-/* Save the most recent siginfo for LP. This is currently only called
- for SIGTRAP; some ports use the si_addr field for
- target_stopped_data_address. In the future, it may also be used to
- restore the siginfo of requeued signals. */
-
-static void
-save_siginfo (struct lwp_info *lp)
-{
- errno = 0;
- ptrace (PTRACE_GETSIGINFO, GET_LWP (lp->ptid),
- (PTRACE_TYPE_ARG3) 0, &lp->siginfo);
-
- if (errno != 0)
- memset (&lp->siginfo, 0, sizeof (lp->siginfo));
-}
-
/* Send a SIGSTOP to LP. */
static int
target_pid_to_str (lp->ptid));
}
errno = 0;
- ret = kill_lwp (GET_LWP (lp->ptid), SIGSTOP);
+ ret = kill_lwp (ptid_get_lwp (lp->ptid), SIGSTOP);
if (debug_linux_nat)
{
fprintf_unfiltered (gdb_stdlog,
if (!lp->ignore_sigint)
return;
- if (!linux_nat_has_pending_sigint (GET_LWP (lp->ptid)))
+ if (!linux_nat_has_pending_sigint (ptid_get_lwp (lp->ptid)))
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
old_chain = save_inferior_ptid ();
inferior_ptid = lp->ptid;
- lp->stopped_by_watchpoint = linux_ops->to_stopped_by_watchpoint ();
+ lp->stopped_by_watchpoint = linux_ops->to_stopped_by_watchpoint (linux_ops);
if (lp->stopped_by_watchpoint)
{
/* See save_sigtrap. */
static int
-linux_nat_stopped_by_watchpoint (void)
+linux_nat_stopped_by_watchpoint (struct target_ops *ops)
{
struct lwp_info *lp = find_lwp_pid (inferior_ptid);
static int
stop_wait_callback (struct lwp_info *lp, void *data)
{
- struct inferior *inf = find_inferior_pid (GET_PID (lp->ptid));
+ struct inferior *inf = find_inferior_pid (ptid_get_pid (lp->ptid));
/* If this is a vfork parent, bail out, it is not going to report
any SIGSTOP until the vfork is done with. */
lp->ignore_sigint = 0;
errno = 0;
- ptrace (PTRACE_CONT, GET_LWP (lp->ptid), 0, 0);
+ ptrace (PTRACE_CONT, ptid_get_lwp (lp->ptid), 0, 0);
+ lp->stopped = 0;
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"PTRACE_CONT %s, 0, 0 (%s) "
{
/* The thread was stopped with a signal other than SIGSTOP. */
- /* Save the trap's siginfo in case we need it later. */
- save_siginfo (lp);
-
save_sigtrap (lp);
if (debug_linux_nat)
/* Save the sigtrap event. */
lp->status = status;
- gdb_assert (!lp->stopped);
gdb_assert (lp->signalled);
- lp->stopped = 1;
}
else
{
"SWC: Delayed SIGSTOP caught for %s.\n",
target_pid_to_str (lp->ptid));
- lp->stopped = 1;
-
/* Reset SIGNALLED only after the stop_wait_callback call
above as it does gdb_assert on SIGNALLED. */
lp->signalled = 0;
struct gdbarch *gdbarch = get_regcache_arch (regcache);
CORE_ADDR pc;
- pc = regcache_read_pc (regcache) - gdbarch_decr_pc_after_break (gdbarch);
+ pc = regcache_read_pc (regcache) - target_decr_pc_after_break (gdbarch);
if (breakpoint_inserted_here_p (get_regcache_aspace (regcache), pc))
{
if (debug_linux_nat)
target_pid_to_str (lp->ptid));
/* Back up the PC if necessary. */
- if (gdbarch_decr_pc_after_break (gdbarch))
+ if (target_decr_pc_after_break (gdbarch))
regcache_write_pc (regcache, pc);
return 1;
fprintf_unfiltered (gdb_stdlog,
"SARC: core wanted LWP %ld stopped "
"(leaving SIGSTOP pending)\n",
- GET_LWP (lp->ptid));
+ ptid_get_lwp (lp->ptid));
lp->status = W_STOPCODE (SIGSTOP);
}
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"SARC: re-resuming LWP %ld\n",
- GET_LWP (lp->ptid));
+ ptid_get_lwp (lp->ptid));
resume_lwp (lp, lp->step, GDB_SIGNAL_0);
}
else
fprintf_unfiltered (gdb_stdlog,
"SARC: not re-resuming LWP %ld "
"(has pending)\n",
- GET_LWP (lp->ptid));
+ ptid_get_lwp (lp->ptid));
if (new_pending_p)
*new_pending_p = 1;
}
linux_nat_filter_event (int lwpid, int status, int *new_pending_p)
{
struct lwp_info *lp;
+ int event = linux_ptrace_get_extended_event (status);
*new_pending_p = 0;
thread changes its tid to the tgid. */
if (WIFSTOPPED (status) && lp == NULL
- && (WSTOPSIG (status) == SIGTRAP && status >> 16 == PTRACE_EVENT_EXEC))
+ && (WSTOPSIG (status) == SIGTRAP && event == PTRACE_EVENT_EXEC))
{
/* A multi-thread exec after we had seen the leader exiting. */
if (debug_linux_nat)
"LLW: Re-adding thread group leader LWP %d.\n",
lwpid);
- lp = add_lwp (BUILD_LWP (lwpid, lwpid));
+ lp = add_lwp (ptid_build (lwpid, lwpid, 0));
lp->stopped = 1;
lp->resumed = 1;
add_thread (lp->ptid);
if (!WIFSTOPPED (status) && !lp)
return NULL;
+ /* This LWP is stopped now. (And if dead, this prevents it from
+ ever being continued.) */
+ lp->stopped = 1;
+
/* Handle GNU/Linux's syscall SIGTRAPs. */
if (WIFSTOPPED (status) && WSTOPSIG (status) == SYSCALL_SIGTRAP)
{
}
/* Handle GNU/Linux's extended waitstatus for trace events. */
- if (WIFSTOPPED (status) && WSTOPSIG (status) == SIGTRAP && status >> 16 != 0)
+ if (WIFSTOPPED (status) && WSTOPSIG (status) == SIGTRAP
+ && linux_is_extended_waitstatus (status))
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
}
if (linux_nat_status_is_event (status))
- {
- /* Save the trap's siginfo in case we need it later. */
- save_siginfo (lp);
-
- save_sigtrap (lp);
- }
+ save_sigtrap (lp);
/* Check if the thread has exited. */
if ((WIFEXITED (status) || WIFSIGNALED (status))
- && num_lwps (GET_PID (lp->ptid)) > 1)
+ && num_lwps (ptid_get_pid (lp->ptid)) > 1)
{
/* If this is the main thread, we must stop all threads and verify
if they are still alive. This is because in the nptl thread model
should be ignored or whether it means the end of the debugged
application, regardless of which threading model is being
used. */
- if (GET_PID (lp->ptid) == GET_LWP (lp->ptid))
+ if (ptid_get_pid (lp->ptid) == ptid_get_lwp (lp->ptid))
{
- lp->stopped = 1;
- iterate_over_lwps (pid_to_ptid (GET_PID (lp->ptid)),
+ iterate_over_lwps (pid_to_ptid (ptid_get_pid (lp->ptid)),
stop_and_resume_callback, new_pending_p);
}
"LLW: %s exited.\n",
target_pid_to_str (lp->ptid));
- if (num_lwps (GET_PID (lp->ptid)) > 1)
+ if (num_lwps (ptid_get_pid (lp->ptid)) > 1)
{
/* If there is at least one more LWP, then the exit signal
was not the end of the debugged application and should be
thread model, LWPs other than the main thread do not issue
signals when they exit so we must check whenever the thread has
stopped. A similar check is made in stop_wait_callback(). */
- if (num_lwps (GET_PID (lp->ptid)) > 1 && !linux_thread_alive (lp->ptid))
+ if (num_lwps (ptid_get_pid (lp->ptid)) > 1 && !linux_thread_alive (lp->ptid))
{
- ptid_t ptid = pid_to_ptid (GET_PID (lp->ptid));
+ ptid_t ptid = pid_to_ptid (ptid_get_pid (lp->ptid));
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
if (linux_nat_prepare_to_resume != NULL)
linux_nat_prepare_to_resume (lp);
- linux_ops->to_resume (linux_ops, pid_to_ptid (GET_LWP (lp->ptid)),
- lp->step, GDB_SIGNAL_0);
+ linux_ops->to_resume (linux_ops,
+ pid_to_ptid (ptid_get_lwp (lp->ptid)),
+ lp->step, GDB_SIGNAL_0);
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LLW: %s %s, 0, 0 (discard SIGSTOP)\n",
registers_changed ();
if (linux_nat_prepare_to_resume != NULL)
linux_nat_prepare_to_resume (lp);
- linux_ops->to_resume (linux_ops, pid_to_ptid (GET_LWP (lp->ptid)),
+ linux_ops->to_resume (linux_ops, pid_to_ptid (ptid_get_lwp (lp->ptid)),
lp->step, GDB_SIGNAL_0);
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
{
/* Upgrade the main thread's ptid. */
thread_change_ptid (inferior_ptid,
- BUILD_LWP (GET_PID (inferior_ptid),
- GET_PID (inferior_ptid)));
+ ptid_build (ptid_get_pid (inferior_ptid),
+ ptid_get_pid (inferior_ptid), 0));
- lp = add_lwp (inferior_ptid);
+ lp = add_initial_lwp (inferior_ptid);
lp->resumed = 1;
}
- /* Make sure SIGCHLD is blocked. */
+ /* Make sure SIGCHLD is blocked until the sigsuspend below. */
block_child_signals (&prev_mask);
retry:
target_pid_to_str (lp->ptid));
}
}
- else if (is_lwp (ptid))
+ else if (ptid_lwp_p (ptid))
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
gdb_assert (lp->resumed);
if (debug_linux_nat)
- fprintf (stderr,
- "LWP %ld got an event %06x, leaving pending.\n",
- ptid_get_lwp (lp->ptid), lp->status);
+ fprintf_unfiltered (gdb_stdlog,
+ "LWP %ld got an event %06x, "
+ "leaving pending.\n",
+ ptid_get_lwp (lp->ptid), lp->status);
if (WIFSTOPPED (lp->status))
{
lp->status = 0;
if (debug_linux_nat)
- fprintf (stderr,
- "LLW: LWP %ld hit a breakpoint while"
- " waiting for another process;"
- " cancelled it\n",
- ptid_get_lwp (lp->ptid));
+ fprintf_unfiltered (gdb_stdlog,
+ "LLW: LWP %ld hit a "
+ "breakpoint while "
+ "waiting for another "
+ "process; "
+ "cancelled it\n",
+ ptid_get_lwp (lp->ptid));
}
- lp->stopped = 1;
}
else
- {
- lp->stopped = 1;
- lp->signalled = 0;
- }
+ lp->signalled = 0;
}
else if (WIFEXITED (lp->status) || WIFSIGNALED (lp->status))
{
if (debug_linux_nat)
- fprintf (stderr,
- "Process %ld exited while stopping LWPs\n",
- ptid_get_lwp (lp->ptid));
+ fprintf_unfiltered (gdb_stdlog,
+ "Process %ld exited while stopping "
+ "LWPs\n",
+ ptid_get_lwp (lp->ptid));
/* This was the last lwp in the process. Since
events are serialized to GDB core, and we can't
pending for the next time we're able to report
it. */
- /* Prevent trying to stop this thread again. We'll
- never try to resume it because it has a pending
- status. */
- lp->stopped = 1;
-
/* Dead LWP's aren't expected to reported a pending
sigstop. */
lp->signalled = 0;
gdb_assert (lp == NULL);
/* Block until we get an event reported with SIGCHLD. */
+ if (debug_linux_nat)
+ fprintf_unfiltered (gdb_stdlog, "LNW: about to sigsuspend\n");
sigsuspend (&suspend_mask);
}
registers_changed ();
if (linux_nat_prepare_to_resume != NULL)
linux_nat_prepare_to_resume (lp);
- linux_ops->to_resume (linux_ops, pid_to_ptid (GET_LWP (lp->ptid)),
+ linux_ops->to_resume (linux_ops,
+ pid_to_ptid (ptid_get_lwp (lp->ptid)),
lp->step, signo);
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
registers_changed ();
if (linux_nat_prepare_to_resume != NULL)
linux_nat_prepare_to_resume (lp);
- linux_ops->to_resume (linux_ops, pid_to_ptid (GET_LWP (lp->ptid)),
+ linux_ops->to_resume (linux_ops, pid_to_ptid (ptid_get_lwp (lp->ptid)),
lp->step, GDB_SIGNAL_0);
lp->stopped = 0;
- memset (&lp->siginfo, 0, sizeof (lp->siginfo));
lp->stopped_by_watchpoint = 0;
}
ptid_t event_ptid;
if (debug_linux_nat)
- fprintf_unfiltered (gdb_stdlog,
- "linux_nat_wait: [%s]\n", target_pid_to_str (ptid));
+ {
+ char *options_string;
+
+ options_string = target_options_to_string (target_options);
+ fprintf_unfiltered (gdb_stdlog,
+ "linux_nat_wait: [%s], [%s]\n",
+ target_pid_to_str (ptid),
+ options_string);
+ xfree (options_string);
+ }
/* Flush the async file first. */
if (target_can_async_p ())
/* PTRACE_KILL may resume the inferior. Send SIGKILL first. */
errno = 0;
- kill (GET_LWP (lp->ptid), SIGKILL);
+ kill_lwp (ptid_get_lwp (lp->ptid), SIGKILL);
if (debug_linux_nat)
- fprintf_unfiltered (gdb_stdlog,
- "KC: kill (SIGKILL) %s, 0, 0 (%s)\n",
- target_pid_to_str (lp->ptid),
- errno ? safe_strerror (errno) : "OK");
+ {
+ int save_errno = errno;
+
+ fprintf_unfiltered (gdb_stdlog,
+ "KC: kill (SIGKILL) %s, 0, 0 (%s)\n",
+ target_pid_to_str (lp->ptid),
+ save_errno ? safe_strerror (save_errno) : "OK");
+ }
/* Some kernels ignore even SIGKILL for processes under ptrace. */
errno = 0;
- ptrace (PTRACE_KILL, GET_LWP (lp->ptid), 0, 0);
+ ptrace (PTRACE_KILL, ptid_get_lwp (lp->ptid), 0, 0);
if (debug_linux_nat)
- fprintf_unfiltered (gdb_stdlog,
- "KC: PTRACE_KILL %s, 0, 0 (%s)\n",
- target_pid_to_str (lp->ptid),
- errno ? safe_strerror (errno) : "OK");
+ {
+ int save_errno = errno;
+
+ fprintf_unfiltered (gdb_stdlog,
+ "KC: PTRACE_KILL %s, 0, 0 (%s)\n",
+ target_pid_to_str (lp->ptid),
+ save_errno ? safe_strerror (save_errno) : "OK");
+ }
return 0;
}
{
do
{
- pid = my_waitpid (GET_LWP (lp->ptid), NULL, __WCLONE);
+ pid = my_waitpid (ptid_get_lwp (lp->ptid), NULL, __WCLONE);
if (pid != (pid_t) -1)
{
if (debug_linux_nat)
kill_callback (lp, NULL);
}
}
- while (pid == GET_LWP (lp->ptid));
+ while (pid == ptid_get_lwp (lp->ptid));
gdb_assert (pid == -1 && errno == ECHILD);
}
do
{
- pid = my_waitpid (GET_LWP (lp->ptid), NULL, 0);
+ pid = my_waitpid (ptid_get_lwp (lp->ptid), NULL, 0);
if (pid != (pid_t) -1)
{
if (debug_linux_nat)
kill_callback (lp, NULL);
}
}
- while (pid == GET_LWP (lp->ptid));
+ while (pid == ptid_get_lwp (lp->ptid));
gdb_assert (pid == -1 && errno == ECHILD);
return 0;
if (last.kind == TARGET_WAITKIND_FORKED
|| last.kind == TARGET_WAITKIND_VFORKED)
{
- ptrace (PT_KILL, PIDGET (last.value.related_pid), 0, 0);
+ ptrace (PT_KILL, ptid_get_pid (last.value.related_pid), 0, 0);
wait (&status);
+
+ /* Let the arch-specific native code know this process is
+ gone. */
+ linux_nat_forget_process (ptid_get_pid (last.value.related_pid));
}
if (forks_exist_p ())
static void
linux_nat_mourn_inferior (struct target_ops *ops)
{
- purge_lwp_list (ptid_get_pid (inferior_ptid));
+ int pid = ptid_get_pid (inferior_ptid);
+
+ purge_lwp_list (pid);
if (! forks_exist_p ())
/* Normal case, no other forks available. */
there are other viable forks to debug. Delete the exiting
one and context-switch to the first available. */
linux_fork_mourn_inferior ();
+
+ /* Let the arch-specific native code know this process is gone. */
+ linux_nat_forget_process (pid);
}
/* Convert a native/host siginfo object, into/from the siginfo in the
}
}
-static LONGEST
+static enum target_xfer_status
linux_xfer_siginfo (struct target_ops *ops, enum target_object object,
const char *annex, gdb_byte *readbuf,
- const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
+ const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len)
{
int pid;
siginfo_t siginfo;
gdb_assert (object == TARGET_OBJECT_SIGNAL_INFO);
gdb_assert (readbuf || writebuf);
- pid = GET_LWP (inferior_ptid);
+ pid = ptid_get_lwp (inferior_ptid);
if (pid == 0)
- pid = GET_PID (inferior_ptid);
+ pid = ptid_get_pid (inferior_ptid);
if (offset > sizeof (siginfo))
- return -1;
+ return TARGET_XFER_E_IO;
errno = 0;
ptrace (PTRACE_GETSIGINFO, pid, (PTRACE_TYPE_ARG3) 0, &siginfo);
if (errno != 0)
- return -1;
+ return TARGET_XFER_E_IO;
/* When GDB is built as a 64-bit application, ptrace writes into
SIGINFO an object with 64-bit layout. Since debugging a 32-bit
errno = 0;
ptrace (PTRACE_SETSIGINFO, pid, (PTRACE_TYPE_ARG3) 0, &siginfo);
if (errno != 0)
- return -1;
+ return TARGET_XFER_E_IO;
}
- return len;
+ *xfered_len = len;
+ return TARGET_XFER_OK;
}
-static LONGEST
+static enum target_xfer_status
linux_nat_xfer_partial (struct target_ops *ops, enum target_object object,
const char *annex, gdb_byte *readbuf,
const gdb_byte *writebuf,
- ULONGEST offset, LONGEST len)
+ ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
{
struct cleanup *old_chain;
- LONGEST xfer;
+ enum target_xfer_status xfer;
if (object == TARGET_OBJECT_SIGNAL_INFO)
return linux_xfer_siginfo (ops, object, annex, readbuf, writebuf,
- offset, len);
+ offset, len, xfered_len);
/* The target is connected but no live inferior is selected. Pass
this request down to a lower stratum (e.g., the executable
file). */
if (object == TARGET_OBJECT_MEMORY && ptid_equal (inferior_ptid, null_ptid))
- return 0;
+ return TARGET_XFER_EOF;
old_chain = save_inferior_ptid ();
- if (is_lwp (inferior_ptid))
- inferior_ptid = pid_to_ptid (GET_LWP (inferior_ptid));
+ if (ptid_lwp_p (inferior_ptid))
+ inferior_ptid = pid_to_ptid (ptid_get_lwp (inferior_ptid));
xfer = linux_ops->to_xfer_partial (ops, object, annex, readbuf, writebuf,
- offset, len);
+ offset, len, xfered_len);
do_cleanups (old_chain);
return xfer;
{
int err, tmp_errno;
- gdb_assert (is_lwp (ptid));
+ gdb_assert (ptid_lwp_p (ptid));
/* Send signal 0 instead of anything ptrace, because ptracing a
running thread errors out claiming that the thread doesn't
exist. */
- err = kill_lwp (GET_LWP (ptid), 0);
+ err = kill_lwp (ptid_get_lwp (ptid), 0);
tmp_errno = errno;
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
{
static char buf[64];
- if (is_lwp (ptid)
- && (GET_PID (ptid) != GET_LWP (ptid)
- || num_lwps (GET_PID (ptid)) > 1))
+ if (ptid_lwp_p (ptid)
+ && (ptid_get_pid (ptid) != ptid_get_lwp (ptid)
+ || num_lwps (ptid_get_pid (ptid)) > 1))
{
- snprintf (buf, sizeof (buf), "LWP %ld", GET_LWP (ptid));
+ snprintf (buf, sizeof (buf), "LWP %ld", ptid_get_lwp (ptid));
return buf;
}
}
static char *
-linux_nat_thread_name (struct thread_info *thr)
+linux_nat_thread_name (struct target_ops *self, struct thread_info *thr)
{
int pid = ptid_get_pid (thr->ptid);
long lwp = ptid_get_lwp (thr->ptid);
char *result = NULL;
snprintf (buf, sizeof (buf), FORMAT, pid, lwp);
- comm_file = fopen (buf, "r");
+ comm_file = gdb_fopen_cloexec (buf, "r");
if (comm_file)
{
/* Not exported by the kernel, so we define it here. */
can be opened to get the symbols for the child process. */
static char *
-linux_child_pid_to_exec_file (int pid)
-{
- char *name1, *name2;
-
- name1 = xmalloc (MAXPATHLEN);
- name2 = xmalloc (MAXPATHLEN);
- make_cleanup (xfree, name1);
- make_cleanup (xfree, name2);
- memset (name2, 0, MAXPATHLEN);
-
- sprintf (name1, "/proc/%d/exe", pid);
- if (readlink (name1, name2, MAXPATHLEN) > 0)
- return name2;
- else
- return name1;
-}
-
-/* Records the thread's register state for the corefile note
- section. */
-
-static char *
-linux_nat_collect_thread_registers (const struct regcache *regcache,
- ptid_t ptid, bfd *obfd,
- char *note_data, int *note_size,
- enum gdb_signal stop_signal)
+linux_child_pid_to_exec_file (struct target_ops *self, int pid)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
- const struct regset *regset;
- int core_regset_p;
- gdb_gregset_t gregs;
- gdb_fpregset_t fpregs;
-
- core_regset_p = gdbarch_regset_from_core_section_p (gdbarch);
-
- if (core_regset_p
- && (regset = gdbarch_regset_from_core_section (gdbarch, ".reg",
- sizeof (gregs)))
- != NULL && regset->collect_regset != NULL)
- regset->collect_regset (regset, regcache, -1, &gregs, sizeof (gregs));
- else
- fill_gregset (regcache, &gregs, -1);
-
- note_data = (char *) elfcore_write_prstatus
- (obfd, note_data, note_size, ptid_get_lwp (ptid),
- gdb_signal_to_host (stop_signal), &gregs);
+ static char buf[PATH_MAX];
+ char name[PATH_MAX];
- if (core_regset_p
- && (regset = gdbarch_regset_from_core_section (gdbarch, ".reg2",
- sizeof (fpregs)))
- != NULL && regset->collect_regset != NULL)
- regset->collect_regset (regset, regcache, -1, &fpregs, sizeof (fpregs));
- else
- fill_fpregset (regcache, &fpregs, -1);
+ xsnprintf (name, PATH_MAX, "/proc/%d/exe", pid);
+ memset (buf, 0, PATH_MAX);
+ if (readlink (name, buf, PATH_MAX - 1) <= 0)
+ strcpy (buf, name);
- note_data = (char *) elfcore_write_prfpreg (obfd, note_data, note_size,
- &fpregs, sizeof (fpregs));
-
- return note_data;
-}
-
-/* Fills the "to_make_corefile_note" target vector. Builds the note
- section for a corefile, and returns it in a malloc buffer. */
-
-static char *
-linux_nat_make_corefile_notes (bfd *obfd, int *note_size)
-{
- /* FIXME: uweigand/2011-10-06: Once all GNU/Linux architectures have been
- converted to gdbarch_core_regset_sections, this function can go away. */
- return linux_make_corefile_notes (target_gdbarch, obfd, note_size,
- linux_nat_collect_thread_registers);
+ return buf;
}
/* Implement the to_xfer_partial interface for memory reads using the /proc
can be much more efficient than banging away at PTRACE_PEEKTEXT,
but it doesn't support writes. */
-static LONGEST
+static enum target_xfer_status
linux_proc_xfer_partial (struct target_ops *ops, enum target_object object,
const char *annex, gdb_byte *readbuf,
const gdb_byte *writebuf,
- ULONGEST offset, LONGEST len)
+ ULONGEST offset, LONGEST len, ULONGEST *xfered_len)
{
LONGEST ret;
int fd;
/* Don't bother for one word. */
if (len < 3 * sizeof (long))
- return 0;
+ return TARGET_XFER_EOF;
/* We could keep this file open and cache it - possibly one per
thread. That requires some juggling, but is even faster. */
- sprintf (filename, "/proc/%d/mem", PIDGET (inferior_ptid));
- fd = open (filename, O_RDONLY | O_LARGEFILE);
+ xsnprintf (filename, sizeof filename, "/proc/%d/mem",
+ ptid_get_pid (inferior_ptid));
+ fd = gdb_open_cloexec (filename, O_RDONLY | O_LARGEFILE, 0);
if (fd == -1)
- return 0;
+ return TARGET_XFER_EOF;
/* If pread64 is available, use it. It's faster if the kernel
supports it (only one syscall), and it's 64-bit safe even on
ret = len;
close (fd);
- return ret;
+
+ if (ret == 0)
+ return TARGET_XFER_EOF;
+ else
+ {
+ *xfered_len = ret;
+ return TARGET_XFER_OK;
+ }
}
/* Enumerate spufs IDs for process PID. */
static LONGEST
-spu_enumerate_spu_ids (int pid, gdb_byte *buf, ULONGEST offset, LONGEST len)
+spu_enumerate_spu_ids (int pid, gdb_byte *buf, ULONGEST offset, ULONGEST len)
{
- enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
LONGEST pos = 0;
LONGEST written = 0;
char path[128];
/* Implement the to_xfer_partial interface for the TARGET_OBJECT_SPU
object type, using the /proc file system. */
-static LONGEST
+
+static enum target_xfer_status
linux_proc_xfer_spu (struct target_ops *ops, enum target_object object,
const char *annex, gdb_byte *readbuf,
const gdb_byte *writebuf,
- ULONGEST offset, LONGEST len)
+ ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
{
char buf[128];
int fd = 0;
int ret = -1;
- int pid = PIDGET (inferior_ptid);
+ int pid = ptid_get_pid (inferior_ptid);
if (!annex)
{
if (!readbuf)
- return -1;
+ return TARGET_XFER_E_IO;
else
- return spu_enumerate_spu_ids (pid, readbuf, offset, len);
+ {
+ LONGEST l = spu_enumerate_spu_ids (pid, readbuf, offset, len);
+
+ if (l < 0)
+ return TARGET_XFER_E_IO;
+ else if (l == 0)
+ return TARGET_XFER_EOF;
+ else
+ {
+ *xfered_len = (ULONGEST) l;
+ return TARGET_XFER_OK;
+ }
+ }
}
xsnprintf (buf, sizeof buf, "/proc/%d/fd/%s", pid, annex);
- fd = open (buf, writebuf? O_WRONLY : O_RDONLY);
+ fd = gdb_open_cloexec (buf, writebuf? O_WRONLY : O_RDONLY, 0);
if (fd <= 0)
- return -1;
+ return TARGET_XFER_E_IO;
if (offset != 0
&& lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset)
{
close (fd);
- return 0;
+ return TARGET_XFER_EOF;
}
if (writebuf)
ret = read (fd, readbuf, (size_t) len);
close (fd);
- return ret;
+
+ if (ret < 0)
+ return TARGET_XFER_E_IO;
+ else if (ret == 0)
+ return TARGET_XFER_EOF;
+ else
+ {
+ *xfered_len = (ULONGEST) ret;
+ return TARGET_XFER_OK;
+ }
}
sigset_t *blocked, sigset_t *ignored)
{
FILE *procfile;
- char buffer[MAXPATHLEN], fname[MAXPATHLEN];
+ char buffer[PATH_MAX], fname[PATH_MAX];
struct cleanup *cleanup;
sigemptyset (pending);
sigemptyset (blocked);
sigemptyset (ignored);
- sprintf (fname, "/proc/%d/status", pid);
- procfile = fopen (fname, "r");
+ xsnprintf (fname, sizeof fname, "/proc/%d/status", pid);
+ procfile = gdb_fopen_cloexec (fname, "r");
if (procfile == NULL)
error (_("Could not open %s"), fname);
cleanup = make_cleanup_fclose (procfile);
- while (fgets (buffer, MAXPATHLEN, procfile) != NULL)
+ while (fgets (buffer, PATH_MAX, procfile) != NULL)
{
/* Normal queued signals are on the SigPnd line in the status
file. However, 2.6 kernels also have a "shared" pending
do_cleanups (cleanup);
}
-static LONGEST
+static enum target_xfer_status
linux_nat_xfer_osdata (struct target_ops *ops, enum target_object object,
const char *annex, gdb_byte *readbuf,
- const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
+ const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len)
{
gdb_assert (object == TARGET_OBJECT_OSDATA);
- return linux_common_xfer_osdata (annex, readbuf, offset, len);
+ *xfered_len = linux_common_xfer_osdata (annex, readbuf, offset, len);
+ if (*xfered_len == 0)
+ return TARGET_XFER_EOF;
+ else
+ return TARGET_XFER_OK;
}
-static LONGEST
+static enum target_xfer_status
linux_xfer_partial (struct target_ops *ops, enum target_object object,
const char *annex, gdb_byte *readbuf,
- const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
+ const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len)
{
- LONGEST xfer;
+ enum target_xfer_status xfer;
if (object == TARGET_OBJECT_AUXV)
return memory_xfer_auxv (ops, object, annex, readbuf, writebuf,
- offset, len);
+ offset, len, xfered_len);
if (object == TARGET_OBJECT_OSDATA)
return linux_nat_xfer_osdata (ops, object, annex, readbuf, writebuf,
- offset, len);
+ offset, len, xfered_len);
if (object == TARGET_OBJECT_SPU)
return linux_proc_xfer_spu (ops, object, annex, readbuf, writebuf,
- offset, len);
+ offset, len, xfered_len);
/* GDB calculates all the addresses in possibly larget width of the address.
Address width needs to be masked before its final use - either by
if (object == TARGET_OBJECT_MEMORY)
{
- int addr_bit = gdbarch_addr_bit (target_gdbarch);
+ int addr_bit = gdbarch_addr_bit (target_gdbarch ());
if (addr_bit < (sizeof (ULONGEST) * HOST_CHAR_BIT))
offset &= ((ULONGEST) 1 << addr_bit) - 1;
}
xfer = linux_proc_xfer_partial (ops, object, annex, readbuf, writebuf,
- offset, len);
- if (xfer != 0)
+ offset, len, xfered_len);
+ if (xfer != TARGET_XFER_EOF)
return xfer;
return super_xfer_partial (ops, object, annex, readbuf, writebuf,
- offset, len);
+ offset, len, xfered_len);
}
static void
}
static VEC(static_tracepoint_marker_p) *
-linux_child_static_tracepoint_markers_by_strid (const char *strid)
+linux_child_static_tracepoint_markers_by_strid (struct target_ops *self,
+ const char *strid)
{
char s[IPA_CMD_BUF_SIZE];
struct cleanup *old_chain;
t->to_post_startup_inferior = linux_child_post_startup_inferior;
t->to_post_attach = linux_child_post_attach;
t->to_follow_fork = linux_child_follow_fork;
- t->to_make_corefile_notes = linux_nat_make_corefile_notes;
super_xfer_partial = t->to_xfer_partial;
t->to_xfer_partial = linux_xfer_partial;
/* target_is_async_p implementation. */
static int
-linux_nat_is_async_p (void)
+linux_nat_is_async_p (struct target_ops *ops)
{
/* NOTE: palves 2008-03-21: We're only async when the user requests
it explicitly with the "set target-async" command.
/* target_can_async_p implementation. */
static int
-linux_nat_can_async_p (void)
+linux_nat_can_async_p (struct target_ops *ops)
{
/* NOTE: palves 2008-03-21: We're only async when the user requests
it explicitly with the "set target-async" command.
}
static int
-linux_nat_supports_non_stop (void)
+linux_nat_supports_non_stop (struct target_ops *self)
{
return 1;
}
int linux_multi_process = 1;
static int
-linux_nat_supports_multi_process (void)
+linux_nat_supports_multi_process (struct target_ops *self)
{
return linux_multi_process;
}
static int
-linux_nat_supports_disable_randomization (void)
+linux_nat_supports_disable_randomization (struct target_ops *self)
{
#ifdef HAVE_PERSONALITY
return 1;
static int async_terminal_is_ours = 1;
-/* target_terminal_inferior implementation. */
+/* target_terminal_inferior implementation.
+
+ This is a wrapper around child_terminal_inferior to add async support. */
static void
-linux_nat_terminal_inferior (void)
+linux_nat_terminal_inferior (struct target_ops *self)
{
if (!target_is_async_p ())
{
/* Async mode is disabled. */
- terminal_inferior ();
+ child_terminal_inferior (self);
return;
}
- terminal_inferior ();
+ child_terminal_inferior (self);
/* Calls to target_terminal_*() are meant to be idempotent. */
if (!async_terminal_is_ours)
set_sigint_trap ();
}
-/* target_terminal_ours implementation. */
+/* target_terminal_ours implementation.
+
+ This is a wrapper around child_terminal_ours to add async support (and
+ implement the target_terminal_ours vs target_terminal_ours_for_output
+ distinction). child_terminal_ours is currently no different than
+ child_terminal_ours_for_output.
+ We leave target_terminal_ours_for_output alone, leaving it to
+ child_terminal_ours_for_output. */
static void
-linux_nat_terminal_ours (void)
+linux_nat_terminal_ours (struct target_ops *self)
{
if (!target_is_async_p ())
{
/* Async mode is disabled. */
- terminal_ours ();
+ child_terminal_ours (self);
return;
}
/* GDB should never give the terminal to the inferior if the
inferior is running in the background (run&, continue&, etc.),
but claiming it sure should. */
- terminal_ours ();
+ child_terminal_ours (self);
if (async_terminal_is_ours)
return;
{
sigset_t prev_mask;
+ /* Block child signals while we create/destroy the pipe, as
+ their handler writes to it. */
block_child_signals (&prev_mask);
if (enable)
{
- if (pipe (linux_nat_event_pipe) == -1)
+ if (gdb_pipe_cloexec (linux_nat_event_pipe) == -1)
internal_error (__FILE__, __LINE__,
"creating event pipe failed.");
/* target_async implementation. */
static void
-linux_nat_async (void (*callback) (enum inferior_event_type event_type,
- void *context), void *context)
+linux_nat_async (struct target_ops *ops,
+ void (*callback) (enum inferior_event_type event_type,
+ void *context),
+ void *context)
{
if (callback != NULL)
{
{
if (!lwp->stopped)
{
- ptid_t ptid = lwp->ptid;
-
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LNSL: running -> suspending %s\n",
}
static void
-linux_nat_stop (ptid_t ptid)
+linux_nat_stop (struct target_ops *self, ptid_t ptid)
{
if (non_stop)
iterate_over_lwps (ptid, linux_nat_stop_lwp, NULL);
else
- linux_ops->to_stop (ptid);
+ linux_ops->to_stop (linux_ops, ptid);
}
static void
-linux_nat_close (int quitting)
+linux_nat_close (struct target_ops *self)
{
/* Unregister from the event loop. */
- if (linux_nat_is_async_p ())
- linux_nat_async (NULL, 0);
+ if (linux_nat_is_async_p (self))
+ linux_nat_async (self, NULL, NULL);
if (linux_ops->to_close)
- linux_ops->to_close (quitting);
+ linux_ops->to_close (linux_ops);
+
+ super_close (self);
}
/* When requests are passed down from the linux-nat layer to the
struct inferior *inf;
int pid;
- pid = GET_LWP (ptid);
- if (GET_LWP (ptid) == 0)
+ if (ptid_get_lwp (ptid) == 0)
{
/* An (lwpid,0,0) ptid. Look up the lwp object to get at the
tgid. */
lwp = find_lwp_pid (ptid);
- pid = GET_PID (lwp->ptid);
+ pid = ptid_get_pid (lwp->ptid);
}
else
{
/* A (pid,lwpid,0) ptid. */
- pid = GET_PID (ptid);
+ pid = ptid_get_pid (ptid);
}
inf = find_inferior_pid (pid);
t->to_async = linux_nat_async;
t->to_terminal_inferior = linux_nat_terminal_inferior;
t->to_terminal_ours = linux_nat_terminal_ours;
+
+ super_close = t->to_close;
t->to_close = linux_nat_close;
/* Methods for non-stop support. */
linux_nat_new_thread = new_thread;
}
+/* See declaration in linux-nat.h. */
+
+void
+linux_nat_set_new_fork (struct target_ops *t,
+ linux_nat_new_fork_ftype *new_fork)
+{
+ /* Save the pointer. */
+ linux_nat_new_fork = new_fork;
+}
+
+/* See declaration in linux-nat.h. */
+
+void
+linux_nat_set_forget_process (struct target_ops *t,
+ linux_nat_forget_process_ftype *fn)
+{
+ /* Save the pointer. */
+ linux_nat_forget_process_hook = fn;
+}
+
+/* See declaration in linux-nat.h. */
+
+void
+linux_nat_forget_process (pid_t pid)
+{
+ if (linux_nat_forget_process_hook != NULL)
+ linux_nat_forget_process_hook (pid);
+}
+
/* Register a method that converts a siginfo object between the layout
that ptrace returns, and the layout in the architecture of the
inferior. */
linux_nat_prepare_to_resume = prepare_to_resume;
}
-/* Return the saved siginfo associated with PTID. */
-siginfo_t *
-linux_nat_get_siginfo (ptid_t ptid)
+/* See linux-nat.h. */
+
+int
+linux_nat_get_siginfo (ptid_t ptid, siginfo_t *siginfo)
{
- struct lwp_info *lp = find_lwp_pid (ptid);
+ int pid;
- gdb_assert (lp != NULL);
+ pid = ptid_get_lwp (ptid);
+ if (pid == 0)
+ pid = ptid_get_pid (ptid);
- return &lp->siginfo;
+ errno = 0;
+ ptrace (PTRACE_GETSIGINFO, pid, (PTRACE_TYPE_ARG3) 0, siginfo);
+ if (errno != 0)
+ {
+ memset (siginfo, 0, sizeof (*siginfo));
+ return 0;
+ }
+ return 1;
}
/* Provide a prototype to silence -Wmissing-prototypes. */
void
_initialize_linux_nat (void)
{
- add_setshow_zinteger_cmd ("lin-lwp", class_maintenance,
- &debug_linux_nat, _("\
+ add_setshow_zuinteger_cmd ("lin-lwp", class_maintenance,
+ &debug_linux_nat, _("\
Set debugging of GNU/Linux lwp module."), _("\
Show debugging of GNU/Linux lwp module."), _("\
Enables printf debugging output."),
- NULL,
- show_debug_linux_nat,
- &setdebuglist, &showdebuglist);
+ NULL,
+ show_debug_linux_nat,
+ &setdebuglist, &showdebuglist);
/* Save this mask as the default. */
sigprocmask (SIG_SETMASK, NULL, &normal_mask);
sigdelset (&suspend_mask, SIGCHLD);
sigemptyset (&blocked_mask);
+
+ /* Do not enable PTRACE_O_TRACEEXIT until GDB is more prepared to
+ support read-only process state. */
+ linux_ptrace_set_additional_flags (PTRACE_O_TRACESYSGOOD
+ | PTRACE_O_TRACEVFORKDONE
+ | PTRACE_O_TRACEVFORK
+ | PTRACE_O_TRACEFORK
+ | PTRACE_O_TRACEEXEC);
}
\f
static int
get_signo (const char *name)
{
- struct minimal_symbol *ms;
+ struct bound_minimal_symbol ms;
int signo;
ms = lookup_minimal_symbol (name, NULL, NULL);
- if (ms == NULL)
+ if (ms.minsym == NULL)
return 0;
- if (target_read_memory (SYMBOL_VALUE_ADDRESS (ms), (gdb_byte *) &signo,
+ if (target_read_memory (BMSYMBOL_VALUE_ADDRESS (ms), (gdb_byte *) &signo,
sizeof (signo)) != 0)
return 0;
projects / platform / upstream / binutils.git / blobdiff