/* GNU/Linux native-dependent code common to multiple platforms.
- Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
- 2011 Free Software Foundation, Inc.
+ Copyright (C) 2001-2012 Free Software Foundation, Inc.
This file is part of GDB.
#include <sys/vfs.h>
#include "solib.h"
#include "linux-osdata.h"
+#include "linux-tdep.h"
+#include "symfile.h"
+#include "agent.h"
+#include "tracepoint.h"
#ifndef SPUFS_MAGIC
#define SPUFS_MAGIC 0x23c9b64e
static struct target_ops linux_ops_saved;
/* The method to call, if any, when a new thread is attached. */
-static void (*linux_nat_new_thread) (ptid_t);
+static void (*linux_nat_new_thread) (struct lwp_info *);
+
+/* Hook to call prior to resuming a thread. */
+static void (*linux_nat_prepare_to_resume) (struct lwp_info *);
/* The method to call, if any, when the siginfo object needs to be
converted between the layout returned by ptrace, and the layout in
struct lwp_info;
static struct lwp_info *add_lwp (ptid_t ptid);
static void purge_lwp_list (int pid);
+static void delete_lwp (ptid_t ptid);
static struct lwp_info *find_lwp_pid (ptid_t ptid);
\f
linux_enable_tracesysgood (ptid);
}
+/* Return the number of known LWPs in the tgid given by PID. */
+
+static int
+num_lwps (int pid)
+{
+ int count = 0;
+ struct lwp_info *lp;
+
+ for (lp = lwp_list; lp; lp = lp->next)
+ if (ptid_get_pid (lp->ptid) == pid)
+ count++;
+
+ return count;
+}
+
+/* Call delete_lwp with prototype compatible for make_cleanup. */
+
+static void
+delete_lwp_cleanup (void *lp_voidp)
+{
+ struct lwp_info *lp = lp_voidp;
+
+ delete_lwp (lp->ptid);
+}
+
static int
linux_child_follow_fork (struct target_ops *ops, int follow_child)
{
/* 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
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
{
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. */
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);
return buf;
}
+/* Destroy and free LP. */
+
+static void
+lwp_free (struct lwp_info *lp)
+{
+ xfree (lp->arch_private);
+ xfree (lp);
+}
+
/* Remove all LWPs belong to PID from the lwp list. */
static void
else
lpprev->next = lp->next;
- xfree (lp);
+ lwp_free (lp);
}
else
lpprev = lp;
}
}
-/* Return the number of known LWPs in the tgid given by PID. */
-
-static int
-num_lwps (int pid)
-{
- int count = 0;
- struct lwp_info *lp;
-
- for (lp = lwp_list; lp; lp = lp->next)
- if (ptid_get_pid (lp->ptid) == pid)
- count++;
-
- return count;
-}
-
/* 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). */
lp->next = lwp_list;
lwp_list = lp;
+ /* 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)
- linux_nat_new_thread (ptid);
+ linux_nat_new_thread (lp);
return lp;
}
else
lwp_list = lp->next;
- xfree (lp);
+ lwp_free (lp);
}
/* Return a pointer to the structure describing the LWP corresponding
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
delete_lwp (lp->ptid);
}
-/* Detect `T (stopped)' in `/proc/PID/status'.
- Other states including `T (tracing stop)' are reported as false. */
-
-static int
-pid_is_stopped (pid_t pid)
-{
- FILE *status_file;
- char buf[100];
- int retval = 0;
-
- snprintf (buf, sizeof (buf), "/proc/%d/status", (int) pid);
- status_file = fopen (buf, "r");
- if (status_file != NULL)
- {
- int have_state = 0;
-
- while (fgets (buf, sizeof (buf), status_file))
- {
- if (strncmp (buf, "State:", 6) == 0)
- {
- have_state = 1;
- break;
- }
- }
- if (have_state && strstr (buf, "T (stopped)") != NULL)
- retval = 1;
- fclose (status_file);
- }
- return retval;
-}
-
/* Wait for the LWP specified by LP, which we have just attached to.
Returns a wait status for that LWP, to cache. */
pid_t new_pid, pid = GET_LWP (ptid);
int status;
- if (pid_is_stopped (pid))
+ if (linux_proc_pid_is_stopped (pid))
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
/* Pass on any pending signal for this LWP. */
get_pending_status (lp, &status);
+ if (linux_nat_prepare_to_resume != NULL)
+ linux_nat_prepare_to_resume (lp);
errno = 0;
if (ptrace (PTRACE_DETACH, GET_LWP (lp->ptid), 0,
WSTOPSIG (status)) < 0)
target_pid_to_str (main_lwp->ptid));
}
+ if (linux_nat_prepare_to_resume != NULL)
+ linux_nat_prepare_to_resume (main_lwp);
delete_lwp (main_lwp->ptid);
if (forks_exist_p ())
"RC: PTRACE_CONT %s, 0, 0 (resuming sibling)\n",
target_pid_to_str (lp->ptid));
+ 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)),
step, TARGET_SIGNAL_0);
/* Convert to something the lower layer understands. */
ptid = pid_to_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;
/* Note that gdbarch_get_syscall_number may access registers, hence
fill a regcache. */
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)),
lp->step, TARGET_SIGNAL_0);
return 1;
fprintf_unfiltered (gdb_stdlog,
"LHEW: resuming new LWP %ld\n",
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),
0, TARGET_SIGNAL_0);
new_lp->stopped = 0;
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"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)),
0, TARGET_SIGNAL_0);
return 0;
}
+/* Request a stop on LWP. */
+
+void
+linux_stop_lwp (struct lwp_info *lwp)
+{
+ stop_callback (lwp, NULL);
+}
+
/* Return non-zero if LWP PID has a pending SIGINT. */
static int
other lwp. In that case set *NEW_PENDING_P to true. */
static struct lwp_info *
-linux_nat_filter_event (int lwpid, int status, int options, int *new_pending_p)
+linux_nat_filter_event (int lwpid, int status, int *new_pending_p)
{
struct lwp_info *lp;
fork, vfork, and clone events, then we'll just add the
new one to our list and go back to waiting for the event
to be reported - the stopped process might be returned
- from waitpid before or after the event is. */
+ from waitpid before or after the event is.
+
+ But note the case of a non-leader thread exec'ing after the
+ leader having exited, and gone from our lists. The non-leader
+ thread changes its tid to the tgid. */
+
+ if (WIFSTOPPED (status) && lp == NULL
+ && (WSTOPSIG (status) == SIGTRAP && status >> 16 == PTRACE_EVENT_EXEC))
+ {
+ /* A multi-thread exec after we had seen the leader exiting. */
+ if (debug_linux_nat)
+ fprintf_unfiltered (gdb_stdlog,
+ "LLW: Re-adding thread group leader LWP %d.\n",
+ lwpid);
+
+ lp = add_lwp (BUILD_LWP (lwpid, lwpid));
+ lp->stopped = 1;
+ lp->resumed = 1;
+ add_thread (lp->ptid);
+ }
+
if (WIFSTOPPED (status) && !lp)
{
add_to_pid_list (&stopped_pids, lwpid, status);
if (!WIFSTOPPED (status) && !lp)
return NULL;
- /* NOTE drow/2003-06-17: This code seems to be meant for debugging
- CLONE_PTRACE processes which do not use the thread library -
- otherwise we wouldn't find the new LWP this way. That doesn't
- currently work, and the following code is currently unreachable
- due to the two blocks above. If it's fixed some day, this code
- should be broken out into a function so that we can also pick up
- LWPs from the new interface. */
- if (!lp)
- {
- lp = add_lwp (BUILD_LWP (lwpid, GET_PID (inferior_ptid)));
- if (options & __WCLONE)
- lp->cloned = 1;
-
- gdb_assert (WIFSTOPPED (status)
- && WSTOPSIG (status) == SIGSTOP);
- lp->signalled = 1;
-
- if (!in_thread_list (inferior_ptid))
- {
- inferior_ptid = BUILD_LWP (GET_PID (inferior_ptid),
- GET_PID (inferior_ptid));
- add_thread (inferior_ptid);
- }
-
- add_thread (lp->ptid);
- }
-
/* Handle GNU/Linux's syscall SIGTRAPs. */
if (WIFSTOPPED (status) && WSTOPSIG (status) == SYSCALL_SIGTRAP)
{
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)),
lp->step, TARGET_SIGNAL_0);
if (debug_linux_nat)
lp->ignore_sigint = 0;
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)),
lp->step, TARGET_SIGNAL_0);
if (debug_linux_nat)
return lp;
}
+/* Detect zombie thread group leaders, and "exit" them. We can't reap
+ their exits until all other threads in the group have exited. */
+
+static void
+check_zombie_leaders (void)
+{
+ struct inferior *inf;
+
+ ALL_INFERIORS (inf)
+ {
+ struct lwp_info *leader_lp;
+
+ if (inf->pid == 0)
+ continue;
+
+ leader_lp = find_lwp_pid (pid_to_ptid (inf->pid));
+ if (leader_lp != NULL
+ /* Check if there are other threads in the group, as we may
+ have raced with the inferior simply exiting. */
+ && num_lwps (inf->pid) > 1
+ && linux_lwp_is_zombie (inf->pid))
+ {
+ if (debug_linux_nat)
+ fprintf_unfiltered (gdb_stdlog,
+ "CZL: Thread group leader %d zombie "
+ "(it exited, or another thread execd).\n",
+ inf->pid);
+
+ /* A leader zombie can mean one of two things:
+
+ - It exited, and there's an exit status pending
+ available, or only the leader exited (not the whole
+ program). In the latter case, we can't waitpid the
+ leader's exit status until all other threads are gone.
+
+ - There are 3 or more threads in the group, and a thread
+ other than the leader exec'd. On an exec, the Linux
+ kernel destroys all other threads (except the execing
+ one) in the thread group, and resets the execing thread's
+ tid to the tgid. No exit notification is sent for the
+ execing thread -- from the ptracer's perspective, it
+ appears as though the execing thread just vanishes.
+ Until we reap all other threads except the leader and the
+ execing thread, the leader will be zombie, and the
+ execing thread will be in `D (disc sleep)'. As soon as
+ all other threads are reaped, the execing thread changes
+ it's tid to the tgid, and the previous (zombie) leader
+ vanishes, giving place to the "new" leader. We could try
+ distinguishing the exit and exec cases, by waiting once
+ more, and seeing if something comes out, but it doesn't
+ sound useful. The previous leader _does_ go away, and
+ we'll re-add the new one once we see the exec event
+ (which is just the same as what would happen if the
+ previous leader did exit voluntarily before some other
+ thread execs). */
+
+ if (debug_linux_nat)
+ fprintf_unfiltered (gdb_stdlog,
+ "CZL: Thread group leader %d vanished.\n",
+ inf->pid);
+ exit_lwp (leader_lp);
+ }
+ }
+}
+
static ptid_t
linux_nat_wait_1 (struct target_ops *ops,
ptid_t ptid, struct target_waitstatus *ourstatus,
static sigset_t prev_mask;
enum resume_kind last_resume_kind;
struct lwp_info *lp;
- int options;
int status;
- pid_t pid;
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog, "LLW: enter\n");
/* Make sure SIGCHLD is blocked. */
block_child_signals (&prev_mask);
- if (ptid_equal (ptid, minus_one_ptid))
- pid = -1;
- else if (ptid_is_pid (ptid))
- /* A request to wait for a specific tgid. This is not possible
- with waitpid, so instead, we wait for any child, and leave
- children we're not interested in right now with a pending
- status to report later. */
- pid = -1;
- else
- pid = GET_LWP (ptid);
-
retry:
lp = NULL;
status = 0;
- options = 0;
-
- /* Make sure that of those LWPs we want to get an event from, there
- is at least one LWP that has been resumed. If there's none, just
- bail out. The core may just be flushing asynchronously all
- events. */
- if (iterate_over_lwps (ptid, resumed_callback, NULL) == NULL)
- {
- ourstatus->kind = TARGET_WAITKIND_IGNORE;
-
- if (debug_linux_nat)
- fprintf_unfiltered (gdb_stdlog, "LLW: exit (no resumed LWP)\n");
-
- restore_child_signals_mask (&prev_mask);
- return minus_one_ptid;
- }
/* First check if there is a LWP with a wait status pending. */
- if (pid == -1)
+ if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid))
{
- /* Any LWP that's been resumed will do. */
+ /* Any LWP in the PTID group that's been resumed will do. */
lp = iterate_over_lwps (ptid, status_callback, NULL);
if (lp)
{
status_to_str (lp->status),
target_pid_to_str (lp->ptid));
}
-
- /* But if we don't find one, we'll have to wait, and check both
- cloned and uncloned processes. We start with the cloned
- processes. */
- options = __WCLONE | WNOHANG;
}
else if (is_lwp (ptid))
{
status_to_str (lp->status),
target_pid_to_str (lp->ptid));
- /* If we have to wait, take into account whether PID is a cloned
- process or not. And we have to convert it to something that
- the layer beneath us can understand. */
- options = lp->cloned ? __WCLONE : 0;
- pid = GET_LWP (ptid);
-
/* We check for lp->waitstatus in addition to lp->status,
because we can have pending process exits recorded in
lp->status and W_EXITCODE(0,0) == 0. We should probably have
/* Resume the thread. It should halt immediately returning the
pending SIGSTOP. */
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)),
lp->step, TARGET_SIGNAL_0);
if (debug_linux_nat)
set_sigint_trap ();
}
- /* Translate generic target_wait options into waitpid options. */
- if (target_options & TARGET_WNOHANG)
- options |= WNOHANG;
+ /* But if we don't find a pending event, we'll have to wait. */
while (lp == NULL)
{
pid_t lwpid;
- lwpid = my_waitpid (pid, &status, options);
+ /* Always use -1 and WNOHANG, due to couple of a kernel/ptrace
+ quirks:
+
+ - If the thread group leader exits while other threads in the
+ thread group still exist, waitpid(TGID, ...) hangs. That
+ waitpid won't return an exit status until the other threads
+ in the group are reapped.
+
+ - When a non-leader thread execs, that thread just vanishes
+ without reporting an exit (so we'd hang if we waited for it
+ explicitly in that case). The exec event is reported to
+ the TGID pid. */
+
+ errno = 0;
+ lwpid = my_waitpid (-1, &status, __WCLONE | WNOHANG);
+ if (lwpid == 0 || (lwpid == -1 && errno == ECHILD))
+ lwpid = my_waitpid (-1, &status, WNOHANG);
+
+ if (debug_linux_nat)
+ fprintf_unfiltered (gdb_stdlog,
+ "LNW: waitpid(-1, ...) returned %d, %s\n",
+ lwpid, errno ? safe_strerror (errno) : "ERRNO-OK");
if (lwpid > 0)
{
now have pending events to handle. */
int new_pending;
- gdb_assert (pid == -1 || lwpid == pid);
-
if (debug_linux_nat)
{
fprintf_unfiltered (gdb_stdlog,
(long) lwpid, status_to_str (status));
}
- lp = linux_nat_filter_event (lwpid, status, options, &new_pending);
+ lp = linux_nat_filter_event (lwpid, status, &new_pending);
/* STATUS is now no longer valid, use LP->STATUS instead. */
status = 0;
- if (lp
- && ptid_is_pid (ptid)
- && ptid_get_pid (lp->ptid) != ptid_get_pid (ptid))
+ if (lp && !ptid_match (lp->ptid, ptid))
{
gdb_assert (lp->resumed);
store_waitstatus (&lp->waitstatus, lp->status);
}
- if (new_pending)
- goto retry;
-
/* Keep looking. */
lp = NULL;
- continue;
}
- if (lp)
- break;
- else
+ if (new_pending)
{
- if (new_pending)
- goto retry;
+ /* Some LWP now has a pending event. Go all the way
+ back to check it. */
+ goto retry;
+ }
- if (pid == -1)
- {
- /* waitpid did return something. Restart over. */
- options |= __WCLONE;
- }
- continue;
+ if (lp)
+ {
+ /* We got an event to report to the core. */
+ break;
}
+
+ /* Retry until nothing comes out of waitpid. A single
+ SIGCHLD can indicate more than one child stopped. */
+ continue;
}
- if (pid == -1)
- {
- /* Alternate between checking cloned and uncloned processes. */
- options ^= __WCLONE;
+ /* Check for zombie thread group leaders. Those can't be reaped
+ until all other threads in the thread group are. */
+ check_zombie_leaders ();
- /* And every time we have checked both:
- In async mode, return to event loop;
- In sync mode, suspend waiting for a SIGCHLD signal. */
- if (options & __WCLONE)
- {
- if (target_options & TARGET_WNOHANG)
- {
- /* No interesting event. */
- ourstatus->kind = TARGET_WAITKIND_IGNORE;
+ /* If there are no resumed children left, bail. We'd be stuck
+ forever in the sigsuspend call below otherwise. */
+ if (iterate_over_lwps (ptid, resumed_callback, NULL) == NULL)
+ {
+ if (debug_linux_nat)
+ fprintf_unfiltered (gdb_stdlog, "LLW: exit (no resumed LWP)\n");
- if (debug_linux_nat)
- fprintf_unfiltered (gdb_stdlog, "LLW: exit (ignore)\n");
+ ourstatus->kind = TARGET_WAITKIND_NO_RESUMED;
- restore_child_signals_mask (&prev_mask);
- return minus_one_ptid;
- }
+ if (!target_can_async_p ())
+ clear_sigint_trap ();
- sigsuspend (&suspend_mask);
- }
+ restore_child_signals_mask (&prev_mask);
+ return minus_one_ptid;
}
- else if (target_options & TARGET_WNOHANG)
- {
- /* No interesting event for PID yet. */
- ourstatus->kind = TARGET_WAITKIND_IGNORE;
+ /* No interesting event to report to the core. */
+
+ if (target_options & TARGET_WNOHANG)
+ {
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog, "LLW: exit (ignore)\n");
+ ourstatus->kind = TARGET_WAITKIND_IGNORE;
restore_child_signals_mask (&prev_mask);
return minus_one_ptid;
}
/* We shouldn't end up here unless we want to try again. */
gdb_assert (lp == NULL);
+
+ /* Block until we get an event reported with SIGCHLD. */
+ sigsuspend (&suspend_mask);
}
if (!target_can_async_p ())
newly attached threads may cause an unwanted delay in
getting them running. */
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)),
lp->step, signo);
if (debug_linux_nat)
from among those that have had events. Giving equal priority
to all LWPs that have had events helps prevent
starvation. */
- if (pid == -1)
+ if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid))
select_event_lwp (ptid, &lp, &status);
/* Now that we've selected our final event LWP, cancel any
&& lp->status == 0
&& lp->waitstatus.kind == TARGET_WAITKIND_IGNORE)
{
+ struct regcache *regcache = get_thread_regcache (lp->ptid);
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ CORE_ADDR pc = regcache_read_pc (regcache);
+
gdb_assert (is_executing (lp->ptid));
/* Don't bother if there's a breakpoint at PC that we'd hit
immediately, and we're not waiting for this LWP. */
if (!ptid_match (lp->ptid, *wait_ptid_p))
{
- struct regcache *regcache = get_thread_regcache (lp->ptid);
- CORE_ADDR pc = regcache_read_pc (regcache);
-
if (breakpoint_inserted_here_p (get_regcache_aspace (regcache), pc))
return 0;
}
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
- "RSRL: resuming stopped-resumed LWP %s\n",
- target_pid_to_str (lp->ptid));
+ "RSRL: resuming stopped-resumed LWP %s at %s: step=%d\n",
+ target_pid_to_str (lp->ptid),
+ paddress (gdbarch, pc),
+ lp->step);
+ 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)),
lp->step, TARGET_SIGNAL_0);
lp->stopped = 0;
may be more. If we requested a specific lwp or process, also
assume there may be more. */
if (target_can_async_p ()
- && (ourstatus->kind != TARGET_WAITKIND_IGNORE
+ && ((ourstatus->kind != TARGET_WAITKIND_IGNORE
+ && ourstatus->kind != TARGET_WAITKIND_NO_RESUMED)
|| !ptid_equal (ptid, minus_one_ptid)))
async_file_mark ();
return name1;
}
-/* Service function for corefiles and info proc. */
-
-static int
-read_mapping (FILE *mapfile,
- long long *addr,
- long long *endaddr,
- char *permissions,
- long long *offset,
- char *device, long long *inode, char *filename)
-{
- int ret = fscanf (mapfile, "%llx-%llx %s %llx %s %llx",
- addr, endaddr, permissions, offset, device, inode);
-
- filename[0] = '\0';
- if (ret > 0 && ret != EOF)
- {
- /* Eat everything up to EOL for the filename. This will prevent
- weird filenames (such as one with embedded whitespace) from
- confusing this code. It also makes this code more robust in
- respect to annotations the kernel may add after the filename.
-
- Note the filename is used for informational purposes
- only. */
- ret += fscanf (mapfile, "%[^\n]\n", filename);
- }
-
- return (ret != 0 && ret != EOF);
-}
-
-/* Fills the "to_find_memory_regions" target vector. Lists the memory
- regions in the inferior for a corefile. */
-
-static int
-linux_nat_find_memory_regions (find_memory_region_ftype func, void *obfd)
-{
- int pid = PIDGET (inferior_ptid);
- char mapsfilename[MAXPATHLEN];
- FILE *mapsfile;
- long long addr, endaddr, size, offset, inode;
- char permissions[8], device[8], filename[MAXPATHLEN];
- int read, write, exec;
- struct cleanup *cleanup;
-
- /* Compose the filename for the /proc memory map, and open it. */
- sprintf (mapsfilename, "/proc/%d/maps", pid);
- if ((mapsfile = fopen (mapsfilename, "r")) == NULL)
- error (_("Could not open %s."), mapsfilename);
- cleanup = make_cleanup_fclose (mapsfile);
-
- if (info_verbose)
- fprintf_filtered (gdb_stdout,
- "Reading memory regions from %s\n", mapsfilename);
-
- /* Now iterate until end-of-file. */
- while (read_mapping (mapsfile, &addr, &endaddr, &permissions[0],
- &offset, &device[0], &inode, &filename[0]))
- {
- size = endaddr - addr;
-
- /* Get the segment's permissions. */
- read = (strchr (permissions, 'r') != 0);
- write = (strchr (permissions, 'w') != 0);
- exec = (strchr (permissions, 'x') != 0);
-
- if (info_verbose)
- {
- fprintf_filtered (gdb_stdout,
- "Save segment, %s bytes at %s (%c%c%c)",
- plongest (size), paddress (target_gdbarch, addr),
- read ? 'r' : ' ',
- write ? 'w' : ' ', exec ? 'x' : ' ');
- if (filename[0])
- fprintf_filtered (gdb_stdout, " for %s", filename);
- fprintf_filtered (gdb_stdout, "\n");
- }
-
- /* Invoke the callback function to create the corefile
- segment. */
- func (addr, size, read, write, exec, obfd);
- }
- do_cleanups (cleanup);
- return 0;
-}
-
-static int
-find_signalled_thread (struct thread_info *info, void *data)
-{
- if (info->suspend.stop_signal != TARGET_SIGNAL_0
- && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid))
- return 1;
-
- return 0;
-}
-
-static enum target_signal
-find_stop_signal (void)
-{
- struct thread_info *info =
- iterate_over_threads (find_signalled_thread, NULL);
-
- if (info)
- return info->suspend.stop_signal;
- else
- return TARGET_SIGNAL_0;
-}
-
/* Records the thread's register state for the corefile note
section. */
static char *
-linux_nat_do_thread_registers (bfd *obfd, ptid_t ptid,
- char *note_data, int *note_size,
- enum target_signal stop_signal)
+linux_nat_collect_thread_registers (const struct regcache *regcache,
+ ptid_t ptid, bfd *obfd,
+ char *note_data, int *note_size,
+ enum target_signal stop_signal)
{
- unsigned long lwp = ptid_get_lwp (ptid);
- struct gdbarch *gdbarch = target_gdbarch;
- struct regcache *regcache = get_thread_arch_regcache (ptid, gdbarch);
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
const struct regset *regset;
int core_regset_p;
- struct cleanup *old_chain;
- struct core_regset_section *sect_list;
- char *gdb_regset;
-
- old_chain = save_inferior_ptid ();
- inferior_ptid = ptid;
- target_fetch_registers (regcache, -1);
- do_cleanups (old_chain);
+ gdb_gregset_t gregs;
+ gdb_fpregset_t fpregs;
core_regset_p = gdbarch_regset_from_core_section_p (gdbarch);
- sect_list = gdbarch_core_regset_sections (gdbarch);
-
- /* The loop below uses the new struct core_regset_section, which stores
- the supported section names and sizes for the core file. Note that
- note PRSTATUS needs to be treated specially. But the other notes are
- structurally the same, so they can benefit from the new struct. */
- if (core_regset_p && sect_list != NULL)
- while (sect_list->sect_name != NULL)
- {
- regset = gdbarch_regset_from_core_section (gdbarch,
- sect_list->sect_name,
- sect_list->size);
- gdb_assert (regset && regset->collect_regset);
- gdb_regset = xmalloc (sect_list->size);
- regset->collect_regset (regset, regcache, -1,
- gdb_regset, sect_list->size);
-
- if (strcmp (sect_list->sect_name, ".reg") == 0)
- note_data = (char *) elfcore_write_prstatus
- (obfd, note_data, note_size,
- lwp, target_signal_to_host (stop_signal),
- gdb_regset);
- else
- note_data = (char *) elfcore_write_register_note
- (obfd, note_data, note_size,
- sect_list->sect_name, gdb_regset,
- sect_list->size);
- xfree (gdb_regset);
- sect_list++;
- }
- /* For architectures that does not have the struct core_regset_section
- implemented, we use the old method. When all the architectures have
- the new support, the code below should be deleted. */
+ 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
- {
- gdb_gregset_t gregs;
- gdb_fpregset_t fpregs;
-
- 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);
+ fill_gregset (regcache, &gregs, -1);
- note_data = (char *) elfcore_write_prstatus
- (obfd, note_data, note_size, lwp, target_signal_to_host (stop_signal),
- &gregs);
+ note_data = (char *) elfcore_write_prstatus
+ (obfd, note_data, note_size, ptid_get_lwp (ptid),
+ target_signal_to_host (stop_signal), &gregs);
- if (core_regset_p
- && (regset = gdbarch_regset_from_core_section (gdbarch, ".reg2",
- sizeof (fpregs)))
+ 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);
+ regset->collect_regset (regset, regcache, -1, &fpregs, sizeof (fpregs));
+ else
+ fill_fpregset (regcache, &fpregs, -1);
- note_data = (char *) elfcore_write_prfpreg (obfd,
- note_data,
- note_size,
- &fpregs, sizeof (fpregs));
- }
+ note_data = (char *) elfcore_write_prfpreg (obfd, note_data, note_size,
+ &fpregs, sizeof (fpregs));
return note_data;
}
-struct linux_nat_corefile_thread_data
-{
- bfd *obfd;
- char *note_data;
- int *note_size;
- int num_notes;
- enum target_signal stop_signal;
-};
-
-/* Called by gdbthread.c once per thread. Records the thread's
- register state for the corefile note section. */
-
-static int
-linux_nat_corefile_thread_callback (struct lwp_info *ti, void *data)
-{
- struct linux_nat_corefile_thread_data *args = data;
-
- args->note_data = linux_nat_do_thread_registers (args->obfd,
- ti->ptid,
- args->note_data,
- args->note_size,
- args->stop_signal);
- args->num_notes++;
-
- return 0;
-}
-
-/* Enumerate spufs IDs for process PID. */
-
-static void
-iterate_over_spus (int pid, void (*callback) (void *, int), void *data)
-{
- char path[128];
- DIR *dir;
- struct dirent *entry;
-
- xsnprintf (path, sizeof path, "/proc/%d/fd", pid);
- dir = opendir (path);
- if (!dir)
- return;
-
- rewinddir (dir);
- while ((entry = readdir (dir)) != NULL)
- {
- struct stat st;
- struct statfs stfs;
- int fd;
-
- fd = atoi (entry->d_name);
- if (!fd)
- continue;
-
- xsnprintf (path, sizeof path, "/proc/%d/fd/%d", pid, fd);
- if (stat (path, &st) != 0)
- continue;
- if (!S_ISDIR (st.st_mode))
- continue;
-
- if (statfs (path, &stfs) != 0)
- continue;
- if (stfs.f_type != SPUFS_MAGIC)
- continue;
-
- callback (data, fd);
- }
-
- closedir (dir);
-}
-
-/* Generate corefile notes for SPU contexts. */
-
-struct linux_spu_corefile_data
-{
- bfd *obfd;
- char *note_data;
- int *note_size;
-};
-
-static void
-linux_spu_corefile_callback (void *data, int fd)
-{
- struct linux_spu_corefile_data *args = data;
- int i;
-
- static const char *spu_files[] =
- {
- "object-id",
- "mem",
- "regs",
- "fpcr",
- "lslr",
- "decr",
- "decr_status",
- "signal1",
- "signal1_type",
- "signal2",
- "signal2_type",
- "event_mask",
- "event_status",
- "mbox_info",
- "ibox_info",
- "wbox_info",
- "dma_info",
- "proxydma_info",
- };
-
- for (i = 0; i < sizeof (spu_files) / sizeof (spu_files[0]); i++)
- {
- char annex[32], note_name[32];
- gdb_byte *spu_data;
- LONGEST spu_len;
-
- xsnprintf (annex, sizeof annex, "%d/%s", fd, spu_files[i]);
- spu_len = target_read_alloc (¤t_target, TARGET_OBJECT_SPU,
- annex, &spu_data);
- if (spu_len > 0)
- {
- xsnprintf (note_name, sizeof note_name, "SPU/%s", annex);
- args->note_data = elfcore_write_note (args->obfd, args->note_data,
- args->note_size, note_name,
- NT_SPU, spu_data, spu_len);
- xfree (spu_data);
- }
- }
-}
-
-static char *
-linux_spu_make_corefile_notes (bfd *obfd, char *note_data, int *note_size)
-{
- struct linux_spu_corefile_data args;
-
- args.obfd = obfd;
- args.note_data = note_data;
- args.note_size = note_size;
-
- iterate_over_spus (PIDGET (inferior_ptid),
- linux_spu_corefile_callback, &args);
-
- return args.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)
{
- struct linux_nat_corefile_thread_data thread_args;
- /* The variable size must be >= sizeof (prpsinfo_t.pr_fname). */
- char fname[16] = { '\0' };
- /* The variable size must be >= sizeof (prpsinfo_t.pr_psargs). */
- char psargs[80] = { '\0' };
- char *note_data = NULL;
- ptid_t filter = pid_to_ptid (ptid_get_pid (inferior_ptid));
- gdb_byte *auxv;
- int auxv_len;
-
- if (get_exec_file (0))
- {
- strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname));
- strncpy (psargs, get_exec_file (0), sizeof (psargs));
- if (get_inferior_args ())
- {
- char *string_end;
- char *psargs_end = psargs + sizeof (psargs);
-
- /* linux_elfcore_write_prpsinfo () handles zero unterminated
- strings fine. */
- string_end = memchr (psargs, 0, sizeof (psargs));
- if (string_end != NULL)
- {
- *string_end++ = ' ';
- strncpy (string_end, get_inferior_args (),
- psargs_end - string_end);
- }
- }
- note_data = (char *) elfcore_write_prpsinfo (obfd,
- note_data,
- note_size, fname, psargs);
- }
-
- /* Dump information for threads. */
- thread_args.obfd = obfd;
- thread_args.note_data = note_data;
- thread_args.note_size = note_size;
- thread_args.num_notes = 0;
- thread_args.stop_signal = find_stop_signal ();
- iterate_over_lwps (filter, linux_nat_corefile_thread_callback, &thread_args);
- gdb_assert (thread_args.num_notes != 0);
- note_data = thread_args.note_data;
-
- auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV,
- NULL, &auxv);
- if (auxv_len > 0)
- {
- note_data = elfcore_write_note (obfd, note_data, note_size,
- "CORE", NT_AUXV, auxv, auxv_len);
- xfree (auxv);
- }
-
- note_data = linux_spu_make_corefile_notes (obfd, note_data, note_size);
-
- make_cleanup (xfree, note_data);
- return note_data;
-}
-
-/* Implement the "info proc" command. */
-
-static void
-linux_nat_info_proc_cmd (char *args, int from_tty)
-{
- /* A long is used for pid instead of an int to avoid a loss of precision
- compiler warning from the output of strtoul. */
- long pid = PIDGET (inferior_ptid);
- FILE *procfile;
- char **argv = NULL;
- char buffer[MAXPATHLEN];
- char fname1[MAXPATHLEN], fname2[MAXPATHLEN];
- int cmdline_f = 1;
- int cwd_f = 1;
- int exe_f = 1;
- int mappings_f = 0;
- int status_f = 0;
- int stat_f = 0;
- int all = 0;
- struct stat dummy;
-
- if (args)
- {
- /* Break up 'args' into an argv array. */
- argv = gdb_buildargv (args);
- make_cleanup_freeargv (argv);
- }
- while (argv != NULL && *argv != NULL)
- {
- if (isdigit (argv[0][0]))
- {
- pid = strtoul (argv[0], NULL, 10);
- }
- else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0)
- {
- mappings_f = 1;
- }
- else if (strcmp (argv[0], "status") == 0)
- {
- status_f = 1;
- }
- else if (strcmp (argv[0], "stat") == 0)
- {
- stat_f = 1;
- }
- else if (strcmp (argv[0], "cmd") == 0)
- {
- cmdline_f = 1;
- }
- else if (strncmp (argv[0], "exe", strlen (argv[0])) == 0)
- {
- exe_f = 1;
- }
- else if (strcmp (argv[0], "cwd") == 0)
- {
- cwd_f = 1;
- }
- else if (strncmp (argv[0], "all", strlen (argv[0])) == 0)
- {
- all = 1;
- }
- else
- {
- /* [...] (future options here). */
- }
- argv++;
- }
- if (pid == 0)
- error (_("No current process: you must name one."));
-
- sprintf (fname1, "/proc/%ld", pid);
- if (stat (fname1, &dummy) != 0)
- error (_("No /proc directory: '%s'"), fname1);
-
- printf_filtered (_("process %ld\n"), pid);
- if (cmdline_f || all)
- {
- sprintf (fname1, "/proc/%ld/cmdline", pid);
- if ((procfile = fopen (fname1, "r")) != NULL)
- {
- struct cleanup *cleanup = make_cleanup_fclose (procfile);
-
- if (fgets (buffer, sizeof (buffer), procfile))
- printf_filtered ("cmdline = '%s'\n", buffer);
- else
- warning (_("unable to read '%s'"), fname1);
- do_cleanups (cleanup);
- }
- else
- warning (_("unable to open /proc file '%s'"), fname1);
- }
- if (cwd_f || all)
- {
- sprintf (fname1, "/proc/%ld/cwd", pid);
- memset (fname2, 0, sizeof (fname2));
- if (readlink (fname1, fname2, sizeof (fname2)) > 0)
- printf_filtered ("cwd = '%s'\n", fname2);
- else
- warning (_("unable to read link '%s'"), fname1);
- }
- if (exe_f || all)
- {
- sprintf (fname1, "/proc/%ld/exe", pid);
- memset (fname2, 0, sizeof (fname2));
- if (readlink (fname1, fname2, sizeof (fname2)) > 0)
- printf_filtered ("exe = '%s'\n", fname2);
- else
- warning (_("unable to read link '%s'"), fname1);
- }
- if (mappings_f || all)
- {
- sprintf (fname1, "/proc/%ld/maps", pid);
- if ((procfile = fopen (fname1, "r")) != NULL)
- {
- long long addr, endaddr, size, offset, inode;
- char permissions[8], device[8], filename[MAXPATHLEN];
- struct cleanup *cleanup;
-
- cleanup = make_cleanup_fclose (procfile);
- printf_filtered (_("Mapped address spaces:\n\n"));
- if (gdbarch_addr_bit (target_gdbarch) == 32)
- {
- printf_filtered ("\t%10s %10s %10s %10s %7s\n",
- "Start Addr",
- " End Addr",
- " Size", " Offset", "objfile");
- }
- else
- {
- printf_filtered (" %18s %18s %10s %10s %7s\n",
- "Start Addr",
- " End Addr",
- " Size", " Offset", "objfile");
- }
-
- while (read_mapping (procfile, &addr, &endaddr, &permissions[0],
- &offset, &device[0], &inode, &filename[0]))
- {
- size = endaddr - addr;
-
- /* FIXME: carlton/2003-08-27: Maybe the printf_filtered
- calls here (and possibly above) should be abstracted
- out into their own functions? Andrew suggests using
- a generic local_address_string instead to print out
- the addresses; that makes sense to me, too. */
-
- if (gdbarch_addr_bit (target_gdbarch) == 32)
- {
- printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
- (unsigned long) addr, /* FIXME: pr_addr */
- (unsigned long) endaddr,
- (int) size,
- (unsigned int) offset,
- filename[0] ? filename : "");
- }
- else
- {
- printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
- (unsigned long) addr, /* FIXME: pr_addr */
- (unsigned long) endaddr,
- (int) size,
- (unsigned int) offset,
- filename[0] ? filename : "");
- }
- }
-
- do_cleanups (cleanup);
- }
- else
- warning (_("unable to open /proc file '%s'"), fname1);
- }
- if (status_f || all)
- {
- sprintf (fname1, "/proc/%ld/status", pid);
- if ((procfile = fopen (fname1, "r")) != NULL)
- {
- struct cleanup *cleanup = make_cleanup_fclose (procfile);
-
- while (fgets (buffer, sizeof (buffer), procfile) != NULL)
- puts_filtered (buffer);
- do_cleanups (cleanup);
- }
- else
- warning (_("unable to open /proc file '%s'"), fname1);
- }
- if (stat_f || all)
- {
- sprintf (fname1, "/proc/%ld/stat", pid);
- if ((procfile = fopen (fname1, "r")) != NULL)
- {
- int itmp;
- char ctmp;
- long ltmp;
- struct cleanup *cleanup = make_cleanup_fclose (procfile);
-
- if (fscanf (procfile, "%d ", &itmp) > 0)
- printf_filtered (_("Process: %d\n"), itmp);
- if (fscanf (procfile, "(%[^)]) ", &buffer[0]) > 0)
- printf_filtered (_("Exec file: %s\n"), buffer);
- if (fscanf (procfile, "%c ", &ctmp) > 0)
- printf_filtered (_("State: %c\n"), ctmp);
- if (fscanf (procfile, "%d ", &itmp) > 0)
- printf_filtered (_("Parent process: %d\n"), itmp);
- if (fscanf (procfile, "%d ", &itmp) > 0)
- printf_filtered (_("Process group: %d\n"), itmp);
- if (fscanf (procfile, "%d ", &itmp) > 0)
- printf_filtered (_("Session id: %d\n"), itmp);
- if (fscanf (procfile, "%d ", &itmp) > 0)
- printf_filtered (_("TTY: %d\n"), itmp);
- if (fscanf (procfile, "%d ", &itmp) > 0)
- printf_filtered (_("TTY owner process group: %d\n"), itmp);
- if (fscanf (procfile, "%lu ", <mp) > 0)
- printf_filtered (_("Flags: 0x%lx\n"), ltmp);
- if (fscanf (procfile, "%lu ", <mp) > 0)
- printf_filtered (_("Minor faults (no memory page): %lu\n"),
- (unsigned long) ltmp);
- if (fscanf (procfile, "%lu ", <mp) > 0)
- printf_filtered (_("Minor faults, children: %lu\n"),
- (unsigned long) ltmp);
- if (fscanf (procfile, "%lu ", <mp) > 0)
- printf_filtered (_("Major faults (memory page faults): %lu\n"),
- (unsigned long) ltmp);
- if (fscanf (procfile, "%lu ", <mp) > 0)
- printf_filtered (_("Major faults, children: %lu\n"),
- (unsigned long) ltmp);
- if (fscanf (procfile, "%ld ", <mp) > 0)
- printf_filtered (_("utime: %ld\n"), ltmp);
- if (fscanf (procfile, "%ld ", <mp) > 0)
- printf_filtered (_("stime: %ld\n"), ltmp);
- if (fscanf (procfile, "%ld ", <mp) > 0)
- printf_filtered (_("utime, children: %ld\n"), ltmp);
- if (fscanf (procfile, "%ld ", <mp) > 0)
- printf_filtered (_("stime, children: %ld\n"), ltmp);
- if (fscanf (procfile, "%ld ", <mp) > 0)
- printf_filtered (_("jiffies remaining in current "
- "time slice: %ld\n"), ltmp);
- if (fscanf (procfile, "%ld ", <mp) > 0)
- printf_filtered (_("'nice' value: %ld\n"), ltmp);
- if (fscanf (procfile, "%lu ", <mp) > 0)
- printf_filtered (_("jiffies until next timeout: %lu\n"),
- (unsigned long) ltmp);
- if (fscanf (procfile, "%lu ", <mp) > 0)
- printf_filtered (_("jiffies until next SIGALRM: %lu\n"),
- (unsigned long) ltmp);
- if (fscanf (procfile, "%ld ", <mp) > 0)
- printf_filtered (_("start time (jiffies since "
- "system boot): %ld\n"), ltmp);
- if (fscanf (procfile, "%lu ", <mp) > 0)
- printf_filtered (_("Virtual memory size: %lu\n"),
- (unsigned long) ltmp);
- if (fscanf (procfile, "%lu ", <mp) > 0)
- printf_filtered (_("Resident set size: %lu\n"),
- (unsigned long) ltmp);
- if (fscanf (procfile, "%lu ", <mp) > 0)
- printf_filtered (_("rlim: %lu\n"), (unsigned long) ltmp);
- if (fscanf (procfile, "%lu ", <mp) > 0)
- printf_filtered (_("Start of text: 0x%lx\n"), ltmp);
- if (fscanf (procfile, "%lu ", <mp) > 0)
- printf_filtered (_("End of text: 0x%lx\n"), ltmp);
- if (fscanf (procfile, "%lu ", <mp) > 0)
- printf_filtered (_("Start of stack: 0x%lx\n"), ltmp);
-#if 0 /* Don't know how architecture-dependent the rest is...
- Anyway the signal bitmap info is available from "status". */
- if (fscanf (procfile, "%lu ", <mp) > 0) /* FIXME arch? */
- printf_filtered (_("Kernel stack pointer: 0x%lx\n"), ltmp);
- if (fscanf (procfile, "%lu ", <mp) > 0) /* FIXME arch? */
- printf_filtered (_("Kernel instr pointer: 0x%lx\n"), ltmp);
- if (fscanf (procfile, "%ld ", <mp) > 0)
- printf_filtered (_("Pending signals bitmap: 0x%lx\n"), ltmp);
- if (fscanf (procfile, "%ld ", <mp) > 0)
- printf_filtered (_("Blocked signals bitmap: 0x%lx\n"), ltmp);
- if (fscanf (procfile, "%ld ", <mp) > 0)
- printf_filtered (_("Ignored signals bitmap: 0x%lx\n"), ltmp);
- if (fscanf (procfile, "%ld ", <mp) > 0)
- printf_filtered (_("Catched signals bitmap: 0x%lx\n"), ltmp);
- if (fscanf (procfile, "%lu ", <mp) > 0) /* FIXME arch? */
- printf_filtered (_("wchan (system call): 0x%lx\n"), ltmp);
-#endif
- do_cleanups (cleanup);
- }
- else
- warning (_("unable to open /proc file '%s'"), fname1);
- }
+ /* 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);
}
/* Implement the to_xfer_partial interface for memory reads using the /proc
offset, len);
}
+static void
+cleanup_target_stop (void *arg)
+{
+ ptid_t *ptid = (ptid_t *) arg;
+
+ gdb_assert (arg != NULL);
+
+ /* Unpause all */
+ target_resume (*ptid, 0, TARGET_SIGNAL_0);
+}
+
+static VEC(static_tracepoint_marker_p) *
+linux_child_static_tracepoint_markers_by_strid (const char *strid)
+{
+ char s[IPA_CMD_BUF_SIZE];
+ struct cleanup *old_chain;
+ int pid = ptid_get_pid (inferior_ptid);
+ VEC(static_tracepoint_marker_p) *markers = NULL;
+ struct static_tracepoint_marker *marker = NULL;
+ char *p = s;
+ ptid_t ptid = ptid_build (pid, 0, 0);
+
+ /* Pause all */
+ target_stop (ptid);
+
+ memcpy (s, "qTfSTM", sizeof ("qTfSTM"));
+ s[sizeof ("qTfSTM")] = 0;
+
+ agent_run_command (pid, s);
+
+ old_chain = make_cleanup (free_current_marker, &marker);
+ make_cleanup (cleanup_target_stop, &ptid);
+
+ while (*p++ == 'm')
+ {
+ if (marker == NULL)
+ marker = XCNEW (struct static_tracepoint_marker);
+
+ do
+ {
+ parse_static_tracepoint_marker_definition (p, &p, marker);
+
+ if (strid == NULL || strcmp (strid, marker->str_id) == 0)
+ {
+ VEC_safe_push (static_tracepoint_marker_p,
+ markers, marker);
+ marker = NULL;
+ }
+ else
+ {
+ release_static_tracepoint_marker (marker);
+ memset (marker, 0, sizeof (*marker));
+ }
+ }
+ while (*p++ == ','); /* comma-separated list */
+
+ memcpy (s, "qTsSTM", sizeof ("qTsSTM"));
+ s[sizeof ("qTsSTM")] = 0;
+ agent_run_command (pid, s);
+ p = s;
+ }
+
+ do_cleanups (old_chain);
+
+ return markers;
+}
+
/* Create a prototype generic GNU/Linux target. The client can override
it with local methods. */
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_find_memory_regions = linux_nat_find_memory_regions;
t->to_make_corefile_notes = linux_nat_make_corefile_notes;
super_xfer_partial = t->to_xfer_partial;
t->to_xfer_partial = linux_xfer_partial;
+
+ t->to_static_tracepoint_markers_by_strid
+ = linux_child_static_tracepoint_markers_by_strid;
}
struct target_ops *
linux_nat_close (int quitting)
{
/* Unregister from the event loop. */
- if (target_is_async_p ())
- target_async (NULL, 0);
+ if (linux_nat_is_async_p ())
+ linux_nat_async (NULL, 0);
if (linux_ops->to_close)
linux_ops->to_close (quitting);
lwpid is a "main" process id or not (it assumes so). We reverse
look up the "main" process id from the lwp here. */
-struct address_space *
+static struct address_space *
linux_nat_thread_address_space (struct target_ops *t, ptid_t ptid)
{
struct lwp_info *lwp;
/* Return the cached value of the processor core for thread PTID. */
-int
+static int
linux_nat_core_of_thread (struct target_ops *ops, ptid_t ptid)
{
struct lwp_info *info = find_lwp_pid (ptid);
/* Register a method to call whenever a new thread is attached. */
void
-linux_nat_set_new_thread (struct target_ops *t, void (*new_thread) (ptid_t))
+linux_nat_set_new_thread (struct target_ops *t,
+ void (*new_thread) (struct lwp_info *))
{
/* Save the pointer. We only support a single registered instance
of the GNU/Linux native target, so we do not need to map this to
linux_nat_siginfo_fixup = siginfo_fixup;
}
+/* Register a method to call prior to resuming a thread. */
+
+void
+linux_nat_set_prepare_to_resume (struct target_ops *t,
+ void (*prepare_to_resume) (struct lwp_info *))
+{
+ /* Save the pointer. */
+ linux_nat_prepare_to_resume = prepare_to_resume;
+}
+
/* Return the saved siginfo associated with PTID. */
struct siginfo *
linux_nat_get_siginfo (ptid_t ptid)
void
_initialize_linux_nat (void)
{
- add_info ("proc", linux_nat_info_proc_cmd, _("\
-Show /proc process information about any running process.\n\
-Specify any process id, or use the program being debugged by default.\n\
-Specify any of the following keywords for detailed info:\n\
- mappings -- list of mapped memory regions.\n\
- stat -- list a bunch of random process info.\n\
- status -- list a different bunch of random process info.\n\
- all -- list all available /proc info."));
-
add_setshow_zinteger_cmd ("lin-lwp", class_maintenance,
&debug_linux_nat, _("\
Set debugging of GNU/Linux lwp module."), _("\
projects / deliverable / binutils-gdb.git / blobdiff