/* Multi-process/thread control for GDB, the GNU debugger.
- Copyright (C) 1986, 1987, 1988, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- 2000, 2001, 2002, 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
+ Copyright (C) 1986-1988, 1993-2004, 2007-2012 Free Software
+ Foundation, Inc.
Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
#include "observer.h"
#include "annotate.h"
#include "cli/cli-decode.h"
+#include "gdb_regex.h"
+#include "cli/cli-utils.h"
+#include "continuations.h"
-/* Definition of struct thread_info exported to gdbthread.h */
+/* Definition of struct thread_info exported to gdbthread.h. */
-/* Prototypes for exported functions. */
+/* Prototypes for exported functions. */
void _initialize_thread (void);
-/* Prototypes for local functions. */
+/* Prototypes for local functions. */
-static struct thread_info *thread_list = NULL;
+struct thread_info *thread_list = NULL;
static int highest_thread_num;
-static struct thread_info *find_thread_id (int num);
-
static void thread_command (char *tidstr, int from_tty);
static void thread_apply_all_command (char *, int);
static int thread_alive (struct thread_info *);
static void restore_current_thread (ptid_t);
static void prune_threads (void);
-/* Frontend view of the thread state. Possible extensions: stepping,
- finishing, until(ling),... */
-enum thread_state
+struct thread_info*
+inferior_thread (void)
{
- THREAD_STOPPED,
- THREAD_RUNNING,
- THREAD_EXITED,
-};
-
-static enum thread_state main_thread_state = THREAD_STOPPED;
-static int main_thread_executing = 0;
+ struct thread_info *tp = find_thread_ptid (inferior_ptid);
+ gdb_assert (tp);
+ return tp;
+}
void
-delete_step_resume_breakpoint (void *arg)
+delete_step_resume_breakpoint (struct thread_info *tp)
{
- struct breakpoint **breakpointp = (struct breakpoint **) arg;
- struct thread_info *tp;
-
- if (*breakpointp != NULL)
+ if (tp && tp->control.step_resume_breakpoint)
{
- delete_breakpoint (*breakpointp);
- for (tp = thread_list; tp; tp = tp->next)
- if (tp->step_resume_breakpoint == *breakpointp)
- tp->step_resume_breakpoint = NULL;
+ delete_breakpoint (tp->control.step_resume_breakpoint);
+ tp->control.step_resume_breakpoint = NULL;
+ }
+}
- *breakpointp = NULL;
+void
+delete_exception_resume_breakpoint (struct thread_info *tp)
+{
+ if (tp && tp->control.exception_resume_breakpoint)
+ {
+ delete_breakpoint (tp->control.exception_resume_breakpoint);
+ tp->control.exception_resume_breakpoint = NULL;
}
}
but not any user-specified thread-specific breakpoints. We can not
delete the breakpoint straight-off, because the inferior might not
be stopped at the moment. */
- if (tp->step_resume_breakpoint)
+ if (tp->control.step_resume_breakpoint)
+ {
+ tp->control.step_resume_breakpoint->disposition = disp_del_at_next_stop;
+ tp->control.step_resume_breakpoint = NULL;
+ }
+
+ if (tp->control.exception_resume_breakpoint)
{
- tp->step_resume_breakpoint->disposition = disp_del_at_next_stop;
- tp->step_resume_breakpoint = NULL;
+ tp->control.exception_resume_breakpoint->disposition
+ = disp_del_at_next_stop;
+ tp->control.exception_resume_breakpoint = NULL;
}
- bpstat_clear (&tp->stop_bpstat);
+ delete_longjmp_breakpoint_at_next_stop (tp->num);
+
+ bpstat_clear (&tp->control.stop_bpstat);
+
+ do_all_intermediate_continuations_thread (tp, 1);
+ do_all_continuations_thread (tp, 1);
}
static void
free_thread (struct thread_info *tp)
{
- clear_thread_inferior_resources (tp);
-
- /* FIXME: do I ever need to call the back-end to give it a
- chance at this private data before deleting the thread? */
if (tp->private)
- xfree (tp->private);
+ {
+ if (tp->private_dtor)
+ tp->private_dtor (tp->private);
+ else
+ xfree (tp->private);
+ }
+ xfree (tp->name);
xfree (tp);
}
struct thread_info *tp, *tpnext;
highest_thread_num = 0;
- main_thread_state = THREAD_STOPPED;
- main_thread_executing = 0;
if (!thread_list)
return;
thread_list = NULL;
}
+/* Allocate a new thread with target id PTID and add it to the thread
+ list. */
+
+static struct thread_info *
+new_thread (ptid_t ptid)
+{
+ struct thread_info *tp;
+
+ tp = xcalloc (1, sizeof (*tp));
+
+ tp->ptid = ptid;
+ tp->num = ++highest_thread_num;
+ tp->next = thread_list;
+ thread_list = tp;
+
+ /* Nothing to follow yet. */
+ tp->pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
+ tp->state = THREAD_STOPPED;
+
+ return tp;
+}
+
struct thread_info *
add_thread_silent (ptid_t ptid)
{
struct thread_info *tp;
- tp = find_thread_pid (ptid);
+ tp = find_thread_ptid (ptid);
if (tp)
/* Found an old thread with the same id. It has to be dead,
otherwise we wouldn't be adding a new thread with the same id.
one. */
{
/* In addition to deleting the thread, if this is the current
- thread, then we need to also get rid of the current infrun
- context, and take care that delete_thread doesn't really
- delete the thread if it is inferior_ptid. Create a new
- template thread in the list with an invalid ptid, context
- switch to it, delete the original thread, reset the new
- thread's ptid, and switch to it. */
+ thread, then we need to take care that delete_thread doesn't
+ really delete the thread if it is inferior_ptid. Create a
+ new template thread in the list with an invalid ptid, switch
+ to it, delete the original thread, reset the new thread's
+ ptid, and switch to it. */
if (ptid_equal (inferior_ptid, ptid))
{
- tp = xmalloc (sizeof (*tp));
- memset (tp, 0, sizeof (*tp));
- tp->ptid = minus_one_ptid;
- tp->num = ++highest_thread_num;
- tp->next = thread_list;
- thread_list = tp;
- context_switch_to (minus_one_ptid);
+ tp = new_thread (null_ptid);
+
+ /* Make switch_to_thread not read from the thread. */
+ tp->state = THREAD_EXITED;
+ switch_to_thread (null_ptid);
/* Now we can delete it. */
delete_thread (ptid);
- /* Since the context is already set to this new thread,
- reset its ptid, and reswitch inferior_ptid to it. */
+ /* Now reset its ptid, and reswitch inferior_ptid to it. */
tp->ptid = ptid;
+ tp->state = THREAD_STOPPED;
switch_to_thread (ptid);
observer_notify_new_thread (tp);
delete_thread (ptid);
}
- tp = (struct thread_info *) xmalloc (sizeof (*tp));
- memset (tp, 0, sizeof (*tp));
- tp->ptid = ptid;
- tp->num = ++highest_thread_num;
- tp->next = thread_list;
- thread_list = tp;
-
+ tp = new_thread (ptid);
observer_notify_new_thread (tp);
return tp;
if (tp->refcount > 0
|| ptid_equal (tp->ptid, inferior_ptid))
{
- if (tp->state_ != THREAD_EXITED)
+ if (tp->state != THREAD_EXITED)
{
- if (!silent)
- observer_notify_thread_exit (tp);
+ observer_notify_thread_exit (tp, silent);
/* Tag it as exited. */
- tp->state_ = THREAD_EXITED;
+ tp->state = THREAD_EXITED;
/* Clear breakpoints, etc. associated with this thread. */
clear_thread_inferior_resources (tp);
return;
}
+ /* Notify thread exit, but only if we haven't already. */
+ if (tp->state != THREAD_EXITED)
+ observer_notify_thread_exit (tp, silent);
+
+ /* Tag it as exited. */
+ tp->state = THREAD_EXITED;
+ clear_thread_inferior_resources (tp);
+
if (tpprev)
tpprev->next = tp->next;
else
thread_list = tp->next;
- /* Notify thread exit, but only if we haven't already. */
- if (!silent && tp->state_ != THREAD_EXITED)
- observer_notify_thread_exit (tp);
-
free_thread (tp);
}
delete_thread_1 (ptid, 1 /* silent */);
}
-static struct thread_info *
+struct thread_info *
find_thread_id (int num)
{
struct thread_info *tp;
/* Find a thread_info by matching PTID. */
struct thread_info *
-find_thread_pid (ptid_t ptid)
+find_thread_ptid (ptid_t ptid)
{
struct thread_info *tp;
thread_id_to_pid (int num)
{
struct thread_info *thread = find_thread_id (num);
+
if (thread)
return thread->ptid;
else
if (ptid_equal (tp->ptid, ptid))
return 1;
- return 0; /* Never heard of 'im */
+ return 0; /* Never heard of 'im. */
+}
+
+/* Finds the first thread of the inferior given by PID. If PID is -1,
+ return the first thread in the list. */
+
+struct thread_info *
+first_thread_of_process (int pid)
+{
+ struct thread_info *tp, *ret = NULL;
+
+ for (tp = thread_list; tp; tp = tp->next)
+ if (pid == -1 || ptid_get_pid (tp->ptid) == pid)
+ if (ret == NULL || tp->num < ret->num)
+ ret = tp;
+
+ return ret;
+}
+
+struct thread_info *
+any_thread_of_process (int pid)
+{
+ struct thread_info *tp;
+
+ for (tp = thread_list; tp; tp = tp->next)
+ if (ptid_get_pid (tp->ptid) == pid)
+ return tp;
+
+ return NULL;
+}
+
+struct thread_info *
+any_live_thread_of_process (int pid)
+{
+ struct thread_info *tp;
+ struct thread_info *tp_executing = NULL;
+
+ for (tp = thread_list; tp; tp = tp->next)
+ if (tp->state != THREAD_EXITED && ptid_get_pid (tp->ptid) == pid)
+ {
+ if (tp->executing)
+ tp_executing = tp;
+ else
+ return tp;
+ }
+
+ return tp_executing;
}
/* Print a list of thread ids currently known, and the total number of
- threads. To be used from within catch_errors. */
+ threads. To be used from within catch_errors. */
static int
do_captured_list_thread_ids (struct ui_out *uiout, void *arg)
{
struct thread_info *tp;
int num = 0;
struct cleanup *cleanup_chain;
+ int current_thread = -1;
- prune_threads ();
- target_find_new_threads ();
+ update_thread_list ();
cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "thread-ids");
for (tp = thread_list; tp; tp = tp->next)
{
- if (tp->state_ == THREAD_EXITED)
+ if (tp->state == THREAD_EXITED)
continue;
+
+ if (ptid_equal (tp->ptid, inferior_ptid))
+ current_thread = tp->num;
+
num++;
ui_out_field_int (uiout, "thread-id", tp->num);
}
do_cleanups (cleanup_chain);
+
+ if (current_thread != -1)
+ ui_out_field_int (uiout, "current-thread-id", current_thread);
ui_out_field_int (uiout, "number-of-threads", num);
return GDB_RC_OK;
}
/* Official gdblib interface function to get a list of thread ids and
- the total number. */
+ the total number. */
enum gdb_rc
gdb_list_thread_ids (struct ui_out *uiout, char **error_message)
{
return GDB_RC_OK;
}
-/* Load infrun state for the thread PID. */
-
-void
-load_infrun_state (ptid_t ptid,
- CORE_ADDR *prev_pc,
- int *trap_expected,
- struct breakpoint **step_resume_breakpoint,
- CORE_ADDR *step_range_start,
- CORE_ADDR *step_range_end,
- struct frame_id *step_frame_id,
- int *stepping_over_breakpoint,
- int *stepping_through_solib_after_catch,
- bpstat *stepping_through_solib_catchpoints,
- int *current_line,
- struct symtab **current_symtab,
- struct continuation **continuations,
- struct continuation **intermediate_continuations,
- int *proceed_to_finish,
- enum step_over_calls_kind *step_over_calls,
- int *stop_step,
- int *step_multi,
- enum target_signal *stop_signal,
- bpstat *stop_bpstat)
-{
- struct thread_info *tp;
-
- /* If we can't find the thread, then we're debugging a single threaded
- process. No need to do anything in that case. */
- tp = find_thread_id (pid_to_thread_id (ptid));
- if (tp == NULL)
- return;
-
- *prev_pc = tp->prev_pc;
- *trap_expected = tp->trap_expected;
- *step_resume_breakpoint = tp->step_resume_breakpoint;
- *step_range_start = tp->step_range_start;
- *step_range_end = tp->step_range_end;
- *step_frame_id = tp->step_frame_id;
- *stepping_over_breakpoint = tp->stepping_over_breakpoint;
- *stepping_through_solib_after_catch =
- tp->stepping_through_solib_after_catch;
- *stepping_through_solib_catchpoints =
- tp->stepping_through_solib_catchpoints;
- *current_line = tp->current_line;
- *current_symtab = tp->current_symtab;
-
- /* In all-stop mode, these are global state, while in non-stop mode,
- they are per thread. */
- if (non_stop)
- {
- *continuations = tp->continuations;
- tp->continuations = NULL;
- *intermediate_continuations = tp->intermediate_continuations;
- tp->intermediate_continuations = NULL;
- *proceed_to_finish = tp->proceed_to_finish;
- *step_over_calls = tp->step_over_calls;
- *stop_step = tp->stop_step;
- *step_multi = tp->step_multi;
- *stop_signal = tp->stop_signal;
-
- /* Swap instead of copy, so we only have to update one of
- them. */
- *stop_bpstat = tp->stop_bpstat;
- tp->stop_bpstat = 0;
- }
-}
-
-/* Save infrun state for the thread PID. */
-
-void
-save_infrun_state (ptid_t ptid,
- CORE_ADDR prev_pc,
- int trap_expected,
- struct breakpoint *step_resume_breakpoint,
- CORE_ADDR step_range_start,
- CORE_ADDR step_range_end,
- const struct frame_id *step_frame_id,
- int stepping_over_breakpoint,
- int stepping_through_solib_after_catch,
- bpstat stepping_through_solib_catchpoints,
- int current_line,
- struct symtab *current_symtab,
- struct continuation *continuations,
- struct continuation *intermediate_continuations,
- int proceed_to_finish,
- enum step_over_calls_kind step_over_calls,
- int stop_step,
- int step_multi,
- enum target_signal stop_signal,
- bpstat stop_bpstat)
-{
- struct thread_info *tp;
-
- /* If we can't find the thread, then we're debugging a single-threaded
- process. Nothing to do in that case. */
- tp = find_thread_id (pid_to_thread_id (ptid));
- if (tp == NULL)
- return;
-
- tp->prev_pc = prev_pc;
- tp->trap_expected = trap_expected;
- tp->step_resume_breakpoint = step_resume_breakpoint;
- tp->step_range_start = step_range_start;
- tp->step_range_end = step_range_end;
- tp->step_frame_id = (*step_frame_id);
- tp->stepping_over_breakpoint = stepping_over_breakpoint;
- tp->stepping_through_solib_after_catch = stepping_through_solib_after_catch;
- tp->stepping_through_solib_catchpoints = stepping_through_solib_catchpoints;
- tp->current_line = current_line;
- tp->current_symtab = current_symtab;
-
- /* In all-stop mode, these are global state, while in non-stop mode,
- they are per thread. */
- if (non_stop)
- {
- tp->continuations = continuations;
- tp->intermediate_continuations = intermediate_continuations;
- tp->proceed_to_finish = proceed_to_finish;
- tp->step_over_calls = step_over_calls;
- tp->stop_step = stop_step;
- tp->step_multi = step_multi;
- tp->stop_signal = stop_signal;
- tp->stop_bpstat = stop_bpstat;
- }
-}
-
-/* Return true if TP is an active thread. */
+/* Return true if TP is an active thread. */
static int
thread_alive (struct thread_info *tp)
{
- if (tp->state_ == THREAD_EXITED)
+ if (tp->state == THREAD_EXITED)
return 0;
if (!target_thread_alive (tp->ptid))
return 0;
}
void
-set_running (ptid_t ptid, int running)
+thread_change_ptid (ptid_t old_ptid, ptid_t new_ptid)
{
+ struct inferior *inf;
struct thread_info *tp;
- if (!thread_list)
- {
- /* This is one of the targets that does not add main
- thread to the thread list. Just use a single
- global flag to indicate that a thread is running.
-
- This problem is unique to ST programs. For MT programs,
- the main thread is always present in the thread list. If it's
- not, the first call to context_switch will mess up GDB internal
- state. */
- if (running
- && main_thread_state != THREAD_RUNNING
- && !suppress_resume_observer)
- observer_notify_target_resumed (ptid);
- main_thread_state = running ? THREAD_RUNNING : THREAD_STOPPED;
- return;
- }
+ /* It can happen that what we knew as the target inferior id
+ changes. E.g, target remote may only discover the remote process
+ pid after adding the inferior to GDB's list. */
+ inf = find_inferior_pid (ptid_get_pid (old_ptid));
+ inf->pid = ptid_get_pid (new_ptid);
+
+ tp = find_thread_ptid (old_ptid);
+ tp->ptid = new_ptid;
+
+ observer_notify_thread_ptid_changed (old_ptid, new_ptid);
+}
+
+void
+set_running (ptid_t ptid, int running)
+{
+ struct thread_info *tp;
+ int all = ptid_equal (ptid, minus_one_ptid);
/* We try not to notify the observer if no thread has actually changed
the running state -- merely to reduce the number of messages to
frontend. Frontend is supposed to handle multiple *running just fine. */
- if (PIDGET (ptid) == -1)
+ if (all || ptid_is_pid (ptid))
{
int any_started = 0;
+
for (tp = thread_list; tp; tp = tp->next)
- {
- if (tp->state_ == THREAD_EXITED)
- continue;
- if (running && tp->state_ == THREAD_STOPPED)
- any_started = 1;
- tp->state_ = running ? THREAD_RUNNING : THREAD_STOPPED;
- }
- if (any_started && !suppress_resume_observer)
- observer_notify_target_resumed (ptid);
+ if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid))
+ {
+ if (tp->state == THREAD_EXITED)
+ continue;
+ if (running && tp->state == THREAD_STOPPED)
+ any_started = 1;
+ tp->state = running ? THREAD_RUNNING : THREAD_STOPPED;
+ }
+ if (any_started)
+ observer_notify_target_resumed (ptid);
}
else
{
int started = 0;
- tp = find_thread_pid (ptid);
+
+ tp = find_thread_ptid (ptid);
gdb_assert (tp);
- gdb_assert (tp->state_ != THREAD_EXITED);
- if (running && tp->state_ == THREAD_STOPPED)
+ gdb_assert (tp->state != THREAD_EXITED);
+ if (running && tp->state == THREAD_STOPPED)
started = 1;
- tp->state_ = running ? THREAD_RUNNING : THREAD_STOPPED;
- if (started && !suppress_resume_observer)
+ tp->state = running ? THREAD_RUNNING : THREAD_STOPPED;
+ if (started)
observer_notify_target_resumed (ptid);
}
}
{
struct thread_info *tp;
- if (!target_has_execution)
- return 0;
-
- if (!thread_list)
- return main_thread_state == state;
-
- tp = find_thread_pid (ptid);
+ tp = find_thread_ptid (ptid);
gdb_assert (tp);
- return tp->state_ == state;
+ return tp->state == state;
}
int
is_stopped (ptid_t ptid)
{
- /* Without execution, this property is always true. */
- if (!target_has_execution)
- return 1;
-
return is_thread_state (ptid, THREAD_STOPPED);
}
int
is_exited (ptid_t ptid)
{
- /* Without execution, this property is always false. */
- if (!target_has_execution)
- return 0;
-
return is_thread_state (ptid, THREAD_EXITED);
}
int
is_running (ptid_t ptid)
{
- /* Without execution, this property is always false. */
- if (!target_has_execution)
- return 0;
-
return is_thread_state (ptid, THREAD_RUNNING);
}
{
struct thread_info *tp;
- if (!target_has_execution)
- return 0;
-
- if (!thread_list)
- return main_thread_state == THREAD_RUNNING;
-
for (tp = thread_list; tp; tp = tp->next)
- if (tp->state_ == THREAD_RUNNING)
+ if (tp->state == THREAD_RUNNING)
return 1;
return 0;
{
struct thread_info *tp;
- if (!target_has_execution)
- return 0;
-
- if (!thread_list)
- return main_thread_executing;
-
- tp = find_thread_pid (ptid);
+ tp = find_thread_ptid (ptid);
gdb_assert (tp);
- return tp->executing_;
+ return tp->executing;
}
void
set_executing (ptid_t ptid, int executing)
{
struct thread_info *tp;
+ int all = ptid_equal (ptid, minus_one_ptid);
- if (!thread_list)
+ if (all || ptid_is_pid (ptid))
{
- /* This target does not add the main thread to the thread list.
- Use a global flag to indicate that the thread is
- executing. */
- main_thread_executing = executing;
- return;
+ for (tp = thread_list; tp; tp = tp->next)
+ if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid))
+ tp->executing = executing;
}
+ else
+ {
+ tp = find_thread_ptid (ptid);
+ gdb_assert (tp);
+ tp->executing = executing;
+ }
+}
- if (PIDGET (ptid) == -1)
+void
+set_stop_requested (ptid_t ptid, int stop)
+{
+ struct thread_info *tp;
+ int all = ptid_equal (ptid, minus_one_ptid);
+
+ if (all || ptid_is_pid (ptid))
{
for (tp = thread_list; tp; tp = tp->next)
- tp->executing_ = executing;
+ if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid))
+ tp->stop_requested = stop;
}
else
{
- tp = find_thread_pid (ptid);
+ tp = find_thread_ptid (ptid);
gdb_assert (tp);
- tp->executing_ = executing;
+ tp->stop_requested = stop;
}
+
+ /* Call the stop requested observer so other components of GDB can
+ react to this request. */
+ if (stop)
+ observer_notify_thread_stop_requested (ptid);
+}
+
+void
+finish_thread_state (ptid_t ptid)
+{
+ struct thread_info *tp;
+ int all;
+ int any_started = 0;
+
+ all = ptid_equal (ptid, minus_one_ptid);
+
+ if (all || ptid_is_pid (ptid))
+ {
+ for (tp = thread_list; tp; tp = tp->next)
+ {
+ if (tp->state == THREAD_EXITED)
+ continue;
+ if (all || ptid_get_pid (ptid) == ptid_get_pid (tp->ptid))
+ {
+ if (tp->executing && tp->state == THREAD_STOPPED)
+ any_started = 1;
+ tp->state = tp->executing ? THREAD_RUNNING : THREAD_STOPPED;
+ }
+ }
+ }
+ else
+ {
+ tp = find_thread_ptid (ptid);
+ gdb_assert (tp);
+ if (tp->state != THREAD_EXITED)
+ {
+ if (tp->executing && tp->state == THREAD_STOPPED)
+ any_started = 1;
+ tp->state = tp->executing ? THREAD_RUNNING : THREAD_STOPPED;
+ }
+ }
+
+ if (any_started)
+ observer_notify_target_resumed (ptid);
+}
+
+void
+finish_thread_state_cleanup (void *arg)
+{
+ ptid_t *ptid_p = arg;
+
+ gdb_assert (arg);
+
+ finish_thread_state (*ptid_p);
}
/* Prints the list of threads and their details on UIOUT.
- This is a version of 'info_thread_command' suitable for
- use from MI.
+ This is a version of 'info_threads_command' suitable for
+ use from MI.
If REQUESTED_THREAD is not -1, it's the GDB id of the thread
that should be printed. Otherwise, all threads are
- printed. */
+ printed.
+ If PID is not -1, only print threads from the process PID.
+ Otherwise, threads from all attached PIDs are printed.
+ If both REQUESTED_THREAD and PID are not -1, then the thread
+ is printed if it belongs to the specified process. Otherwise,
+ an error is raised. */
void
-print_thread_info (struct ui_out *uiout, int requested_thread)
+print_thread_info (struct ui_out *uiout, char *requested_threads, int pid)
{
struct thread_info *tp;
ptid_t current_ptid;
struct cleanup *old_chain;
- char *extra_info;
+ char *extra_info, *name, *target_id;
int current_thread = -1;
- prune_threads ();
- target_find_new_threads ();
+ update_thread_list ();
current_ptid = inferior_ptid;
/* We'll be switching threads temporarily. */
old_chain = make_cleanup_restore_current_thread ();
- make_cleanup_ui_out_list_begin_end (uiout, "threads");
+ /* For backward compatibility, we make a list for MI. A table is
+ preferable for the CLI, though, because it shows table
+ headers. */
+ if (ui_out_is_mi_like_p (uiout))
+ make_cleanup_ui_out_list_begin_end (uiout, "threads");
+ else
+ {
+ int n_threads = 0;
+
+ for (tp = thread_list; tp; tp = tp->next)
+ {
+ if (!number_is_in_list (requested_threads, tp->num))
+ continue;
+
+ if (pid != -1 && PIDGET (tp->ptid) != pid)
+ continue;
+
+ if (tp->state == THREAD_EXITED)
+ continue;
+
+ ++n_threads;
+ }
+
+ if (n_threads == 0)
+ {
+ if (requested_threads == NULL || *requested_threads == '\0')
+ ui_out_message (uiout, 0, _("No threads.\n"));
+ else
+ ui_out_message (uiout, 0, _("No threads match '%s'.\n"),
+ requested_threads);
+ do_cleanups (old_chain);
+ return;
+ }
+
+ make_cleanup_ui_out_table_begin_end (uiout, 4, n_threads, "threads");
+
+ ui_out_table_header (uiout, 1, ui_left, "current", "");
+ ui_out_table_header (uiout, 4, ui_left, "id", "Id");
+ ui_out_table_header (uiout, 17, ui_left, "target-id", "Target Id");
+ ui_out_table_header (uiout, 1, ui_left, "frame", "Frame");
+ ui_out_table_body (uiout);
+ }
+
for (tp = thread_list; tp; tp = tp->next)
{
struct cleanup *chain2;
+ int core;
- if (requested_thread != -1 && tp->num != requested_thread)
+ if (!number_is_in_list (requested_threads, tp->num))
continue;
+ if (pid != -1 && PIDGET (tp->ptid) != pid)
+ {
+ if (requested_threads != NULL && *requested_threads != '\0')
+ error (_("Requested thread not found in requested process"));
+ continue;
+ }
+
if (ptid_equal (tp->ptid, current_ptid))
current_thread = tp->num;
- if (tp->state_ == THREAD_EXITED)
+ if (tp->state == THREAD_EXITED)
continue;
chain2 = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
- if (ptid_equal (tp->ptid, current_ptid))
- ui_out_text (uiout, "* ");
+ if (ui_out_is_mi_like_p (uiout))
+ {
+ /* Compatibility. */
+ if (ptid_equal (tp->ptid, current_ptid))
+ ui_out_text (uiout, "* ");
+ else
+ ui_out_text (uiout, " ");
+ }
else
- ui_out_text (uiout, " ");
+ {
+ if (ptid_equal (tp->ptid, current_ptid))
+ ui_out_field_string (uiout, "current", "*");
+ else
+ ui_out_field_skip (uiout, "current");
+ }
ui_out_field_int (uiout, "id", tp->num);
- ui_out_text (uiout, " ");
- ui_out_field_string (uiout, "target-id", target_tid_to_str (tp->ptid));
- if (tp->state_ != THREAD_EXITED)
+ /* For the CLI, we stuff everything into the target-id field.
+ This is a gross hack to make the output come out looking
+ correct. The underlying problem here is that ui-out has no
+ way to specify that a field's space allocation should be
+ shared by several fields. For MI, we do the right thing
+ instead. */
+
+ target_id = target_pid_to_str (tp->ptid);
+ extra_info = target_extra_thread_info (tp);
+ name = tp->name ? tp->name : target_thread_name (tp);
+
+ if (ui_out_is_mi_like_p (uiout))
{
- extra_info = target_extra_thread_info (tp);
+ ui_out_field_string (uiout, "target-id", target_id);
if (extra_info)
- {
- ui_out_text (uiout, " (");
- ui_out_field_string (uiout, "details", extra_info);
- ui_out_text (uiout, ")");
- }
- ui_out_text (uiout, " ");
+ ui_out_field_string (uiout, "details", extra_info);
+ if (name)
+ ui_out_field_string (uiout, "name", name);
+ }
+ else
+ {
+ struct cleanup *str_cleanup;
+ char *contents;
+
+ if (extra_info && name)
+ contents = xstrprintf ("%s \"%s\" (%s)", target_id,
+ name, extra_info);
+ else if (extra_info)
+ contents = xstrprintf ("%s (%s)", target_id, extra_info);
+ else if (name)
+ contents = xstrprintf ("%s \"%s\"", target_id, name);
+ else
+ contents = xstrdup (target_id);
+ str_cleanup = make_cleanup (xfree, contents);
+
+ ui_out_field_string (uiout, "target-id", contents);
+ do_cleanups (str_cleanup);
}
- if (tp->state_ == THREAD_RUNNING)
+ if (tp->state == THREAD_RUNNING)
ui_out_text (uiout, "(running)\n");
else
{
if (ui_out_is_mi_like_p (uiout))
{
char *state = "stopped";
- if (tp->state_ == THREAD_EXITED)
- state = "exited";
- else if (tp->state_ == THREAD_RUNNING)
+
+ if (tp->state == THREAD_RUNNING)
state = "running";
ui_out_field_string (uiout, "state", state);
}
+ core = target_core_of_thread (tp->ptid);
+ if (ui_out_is_mi_like_p (uiout) && core != -1)
+ ui_out_field_int (uiout, "core", core);
+
do_cleanups (chain2);
}
the "info threads" command. */
do_cleanups (old_chain);
- if (requested_thread == -1)
+ if (pid == -1 && requested_threads == NULL)
{
gdb_assert (current_thread != -1
- || !thread_list);
+ || !thread_list
+ || ptid_equal (inferior_ptid, null_ptid));
if (current_thread != -1 && ui_out_is_mi_like_p (uiout))
ui_out_field_int (uiout, "current-thread-id", current_thread);
ui_out_message (uiout, 0, "\n\
The current thread <Thread ID %d> has terminated. See `help thread'.\n",
current_thread);
+ else if (thread_list
+ && current_thread == -1
+ && ptid_equal (current_ptid, null_ptid))
+ ui_out_message (uiout, 0, "\n\
+No selected thread. See `help thread'.\n");
}
}
-
/* Print information about currently known threads
- * Note: this has the drawback that it _really_ switches
- * threads, which frees the frame cache. A no-side
- * effects info-threads command would be nicer.
- */
+ Optional ARG is a thread id, or list of thread ids.
+
+ Note: this has the drawback that it _really_ switches
+ threads, which frees the frame cache. A no-side
+ effects info-threads command would be nicer. */
static void
info_threads_command (char *arg, int from_tty)
{
- print_thread_info (uiout, -1);
+ print_thread_info (current_uiout, arg, -1);
}
-/* Switch from one thread to another. */
+/* Switch from one thread to another. */
void
switch_to_thread (ptid_t ptid)
{
+ /* Switch the program space as well, if we can infer it from the now
+ current thread. Otherwise, it's up to the caller to select the
+ space it wants. */
+ if (!ptid_equal (ptid, null_ptid))
+ {
+ struct inferior *inf;
+
+ inf = find_inferior_pid (ptid_get_pid (ptid));
+ gdb_assert (inf != NULL);
+ set_current_program_space (inf->pspace);
+ set_current_inferior (inf);
+ }
+
if (ptid_equal (ptid, inferior_ptid))
return;
/* We don't check for is_stopped, because we're called at times
while in the TARGET_RUNNING state, e.g., while handling an
internal event. */
- if (!is_exited (ptid) && !is_executing (ptid))
- stop_pc = read_pc ();
+ if (!ptid_equal (inferior_ptid, null_ptid)
+ && !is_exited (ptid)
+ && !is_executing (ptid))
+ stop_pc = regcache_read_pc (get_thread_regcache (ptid));
else
stop_pc = ~(CORE_ADDR) 0;
}
static void
restore_current_thread (ptid_t ptid)
{
- if (!ptid_equal (ptid, inferior_ptid))
- {
- if (non_stop)
- context_switch_to (ptid);
- else
- switch_to_thread (ptid);
- }
+ switch_to_thread (ptid);
}
static void
struct frame_info *frame = NULL;
int count;
+ /* This means there was no selected frame. */
+ if (frame_level == -1)
+ {
+ select_frame (NULL);
+ return;
+ }
+
gdb_assert (frame_level >= 0);
/* Restore by level first, check if the frame id is the same as
frame = find_relative_frame (get_current_frame (), &count);
if (count == 0
&& frame != NULL
- /* Either the frame ids match, of they're both invalid. The
- latter case is not failsafe, but since it's highly unlikely
+ /* The frame ids must match - either both valid or both outer_frame_id.
+ The latter case is not failsafe, but since it's highly unlikely
the search by level finds the wrong frame, it's 99.9(9)% of
the time (for all practical purposes) safe. */
- && (frame_id_eq (get_frame_id (frame), a_frame_id)
- /* Note: could be better to check every frame_id
- member for equality here. */
- || (!frame_id_p (get_frame_id (frame))
- && !frame_id_p (a_frame_id))))
+ && frame_id_eq (get_frame_id (frame), a_frame_id))
{
/* Cool, all is fine. */
select_frame (frame);
return;
}
- /* Nothing else to do, the frame layout really changed.
- Tell the user. */
- if (!ui_out_is_mi_like_p (uiout))
+ /* Nothing else to do, the frame layout really changed. Select the
+ innermost stack frame. */
+ select_frame (get_current_frame ());
+
+ /* Warn the user. */
+ if (frame_level > 0 && !ui_out_is_mi_like_p (current_uiout))
{
- warning (_("\
-Couldn't restore frame #%d in current thread, at reparsed frame #0\n"),
+ warning (_("Couldn't restore frame #%d in "
+ "current thread, at reparsed frame #0\n"),
frame_level);
/* For MI, we should probably have a notification about
current frame change. But this error is not very
likely, so don't bother for now. */
- print_stack_frame (frame, 1, SRC_LINE);
+ print_stack_frame (get_selected_frame (NULL), 1, SRC_LINE);
}
}
struct frame_id selected_frame_id;
int selected_frame_level;
int was_stopped;
+ int inf_id;
+ int was_removable;
};
static void
{
struct thread_info *tp;
struct current_thread_cleanup *old = arg;
- restore_current_thread (old->inferior_ptid);
+
+ tp = find_thread_ptid (old->inferior_ptid);
+
+ /* If the previously selected thread belonged to a process that has
+ in the mean time been deleted (due to normal exit, detach, etc.),
+ then don't revert back to it, but instead simply drop back to no
+ thread selected. */
+ if (tp
+ && find_inferior_pid (ptid_get_pid (tp->ptid)) != NULL)
+ restore_current_thread (old->inferior_ptid);
+ else
+ {
+ restore_current_thread (null_ptid);
+ set_current_inferior (find_inferior_id (old->inf_id));
+ }
/* The running state of the originally selected thread may have
changed, so we have to recheck it here. */
- if (old->was_stopped
+ if (!ptid_equal (inferior_ptid, null_ptid)
+ && old->was_stopped
&& is_stopped (inferior_ptid)
&& target_has_registers
&& target_has_stack
{
struct current_thread_cleanup *old = arg;
struct thread_info *tp;
- tp = find_thread_pid (old->inferior_ptid);
+ struct inferior *inf;
+
+ tp = find_thread_ptid (old->inferior_ptid);
if (tp)
tp->refcount--;
+ inf = find_inferior_id (old->inf_id);
+ if (inf != NULL)
+ inf->removable = old->was_removable;
xfree (old);
}
old = xmalloc (sizeof (struct current_thread_cleanup));
old->inferior_ptid = inferior_ptid;
- old->was_stopped = is_stopped (inferior_ptid);
- if (old->was_stopped
- && target_has_registers
- && target_has_stack
- && target_has_memory)
- frame = get_selected_frame (NULL);
- else
- frame = NULL;
+ old->inf_id = current_inferior ()->num;
+ old->was_removable = current_inferior ()->removable;
- old->selected_frame_id = get_frame_id (frame);
- old->selected_frame_level = frame_relative_level (frame);
+ if (!ptid_equal (inferior_ptid, null_ptid))
+ {
+ old->was_stopped = is_stopped (inferior_ptid);
+ if (old->was_stopped
+ && target_has_registers
+ && target_has_stack
+ && target_has_memory)
+ {
+ /* When processing internal events, there might not be a
+ selected frame. If we naively call get_selected_frame
+ here, then we can end up reading debuginfo for the
+ current frame, but we don't generally need the debuginfo
+ at this point. */
+ frame = get_selected_frame_if_set ();
+ }
+ else
+ frame = NULL;
- tp = find_thread_pid (inferior_ptid);
- if (tp)
- tp->refcount++;
+ old->selected_frame_id = get_frame_id (frame);
+ old->selected_frame_level = frame_relative_level (frame);
+
+ tp = find_thread_ptid (inferior_ptid);
+ if (tp)
+ tp->refcount++;
+ }
+
+ current_inferior ()->removable = 0;
return make_cleanup_dtor (do_restore_current_thread_cleanup, old,
restore_current_thread_cleanup_dtor);
thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4
thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9
- thread apply all p x/i $pc Apply x/i $pc cmd to all threads
- */
+ thread apply all p x/i $pc Apply x/i $pc cmd to all threads. */
static void
thread_apply_all_command (char *cmd, int from_tty)
if (cmd == NULL || *cmd == '\000')
error (_("Please specify a command following the thread ID list"));
- prune_threads ();
- target_find_new_threads ();
+ update_thread_list ();
old_chain = make_cleanup_restore_current_thread ();
/* Save a copy of the command in case it is clobbered by
- execute_command */
+ execute_command. */
saved_cmd = xstrdup (cmd);
make_cleanup (xfree, saved_cmd);
for (tp = thread_list; tp; tp = tp->next)
if (thread_alive (tp))
{
- if (non_stop)
- context_switch_to (tp->ptid);
- else
- switch_to_thread (tp->ptid);
+ switch_to_thread (tp->ptid);
printf_filtered (_("\nThread %d (%s):\n"),
- tp->num, target_tid_to_str (inferior_ptid));
+ tp->num, target_pid_to_str (inferior_ptid));
execute_command (cmd, from_tty);
- strcpy (cmd, saved_cmd); /* Restore exact command used previously */
+ strcpy (cmd, saved_cmd); /* Restore exact command used
+ previously. */
}
do_cleanups (old_chain);
thread_apply_command (char *tidlist, int from_tty)
{
char *cmd;
- char *p;
struct cleanup *old_chain;
char *saved_cmd;
+ struct get_number_or_range_state state;
if (tidlist == NULL || *tidlist == '\000')
error (_("Please specify a thread ID list"));
error (_("Please specify a command following the thread ID list"));
/* Save a copy of the command in case it is clobbered by
- execute_command */
+ execute_command. */
saved_cmd = xstrdup (cmd);
old_chain = make_cleanup (xfree, saved_cmd);
- while (tidlist < cmd)
+
+ init_number_or_range (&state, tidlist);
+ while (!state.finished && state.string < cmd)
{
struct thread_info *tp;
- int start, end;
+ int start;
+ char *p = tidlist;
- start = strtol (tidlist, &p, 10);
- if (p == tidlist)
- error (_("Error parsing %s"), tidlist);
- tidlist = p;
-
- while (*tidlist == ' ' || *tidlist == '\t')
- tidlist++;
-
- if (*tidlist == '-') /* Got a range of IDs? */
- {
- tidlist++; /* Skip the - */
- end = strtol (tidlist, &p, 10);
- if (p == tidlist)
- error (_("Error parsing %s"), tidlist);
- tidlist = p;
-
- while (*tidlist == ' ' || *tidlist == '\t')
- tidlist++;
- }
- else
- end = start;
+ start = get_number_or_range (&state);
make_cleanup_restore_current_thread ();
- for (; start <= end; start++)
- {
- tp = find_thread_id (start);
+ tp = find_thread_id (start);
- if (!tp)
- warning (_("Unknown thread %d."), start);
- else if (!thread_alive (tp))
- warning (_("Thread %d has terminated."), start);
- else
- {
- if (non_stop)
- context_switch_to (tp->ptid);
- else
- switch_to_thread (tp->ptid);
+ if (!tp)
+ warning (_("Unknown thread %d."), start);
+ else if (!thread_alive (tp))
+ warning (_("Thread %d has terminated."), start);
+ else
+ {
+ switch_to_thread (tp->ptid);
- printf_filtered (_("\nThread %d (%s):\n"), tp->num,
- target_tid_to_str (inferior_ptid));
- execute_command (cmd, from_tty);
+ printf_filtered (_("\nThread %d (%s):\n"), tp->num,
+ target_pid_to_str (inferior_ptid));
+ execute_command (cmd, from_tty);
- /* Restore exact command used previously. */
- strcpy (cmd, saved_cmd);
- }
+ /* Restore exact command used previously. */
+ strcpy (cmd, saved_cmd);
}
}
{
if (!tidstr)
{
+ if (ptid_equal (inferior_ptid, null_ptid))
+ error (_("No thread selected"));
+
if (target_has_stack)
{
if (is_exited (inferior_ptid))
printf_filtered (_("[Current thread is %d (%s) (exited)]\n"),
pid_to_thread_id (inferior_ptid),
- target_tid_to_str (inferior_ptid));
+ target_pid_to_str (inferior_ptid));
else
printf_filtered (_("[Current thread is %d (%s)]\n"),
pid_to_thread_id (inferior_ptid),
- target_tid_to_str (inferior_ptid));
+ target_pid_to_str (inferior_ptid));
}
else
error (_("No stack."));
return;
}
- annotate_thread_changed ();
- gdb_thread_select (uiout, tidstr, NULL);
+ gdb_thread_select (current_uiout, tidstr, NULL);
+}
+
+/* Implementation of `thread name'. */
+
+static void
+thread_name_command (char *arg, int from_tty)
+{
+ struct thread_info *info;
+
+ if (ptid_equal (inferior_ptid, null_ptid))
+ error (_("No thread selected"));
+
+ while (arg && isspace (*arg))
+ ++arg;
+
+ info = inferior_thread ();
+ xfree (info->name);
+ info->name = arg ? xstrdup (arg) : NULL;
+}
+
+/* Find thread ids with a name, target pid, or extra info matching ARG. */
+
+static void
+thread_find_command (char *arg, int from_tty)
+{
+ struct thread_info *tp;
+ char *tmp;
+ unsigned long match = 0;
+
+ if (arg == NULL || *arg == '\0')
+ error (_("Command requires an argument."));
+
+ tmp = re_comp (arg);
+ if (tmp != 0)
+ error (_("Invalid regexp (%s): %s"), tmp, arg);
+
+ update_thread_list ();
+ for (tp = thread_list; tp; tp = tp->next)
+ {
+ if (tp->name != NULL && re_exec (tp->name))
+ {
+ printf_filtered (_("Thread %d has name '%s'\n"),
+ tp->num, tp->name);
+ match++;
+ }
+
+ tmp = target_thread_name (tp);
+ if (tmp != NULL && re_exec (tmp))
+ {
+ printf_filtered (_("Thread %d has target name '%s'\n"),
+ tp->num, tmp);
+ match++;
+ }
+
+ tmp = target_pid_to_str (tp->ptid);
+ if (tmp != NULL && re_exec (tmp))
+ {
+ printf_filtered (_("Thread %d has target id '%s'\n"),
+ tp->num, tmp);
+ match++;
+ }
+
+ tmp = target_extra_thread_info (tp);
+ if (tmp != NULL && re_exec (tmp))
+ {
+ printf_filtered (_("Thread %d has extra info '%s'\n"),
+ tp->num, tmp);
+ match++;
+ }
+ }
+ if (!match)
+ printf_filtered (_("No threads match '%s'\n"), arg);
}
/* Print notices when new threads are attached and detached. */
show_print_thread_events (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
- fprintf_filtered (file, _("\
-Printing of thread events is %s.\n"),
+ fprintf_filtered (file,
+ _("Printing of thread events is %s.\n"),
value);
}
if (!thread_alive (tp))
error (_("Thread ID %d has terminated."), num);
- if (non_stop)
- context_switch_to (tp->ptid);
- else
- switch_to_thread (tp->ptid);
+ switch_to_thread (tp->ptid);
+
+ annotate_thread_changed ();
ui_out_text (uiout, "[Switching to thread ");
ui_out_field_int (uiout, "new-thread-id", pid_to_thread_id (inferior_ptid));
ui_out_text (uiout, " (");
- ui_out_text (uiout, target_tid_to_str (inferior_ptid));
+ ui_out_text (uiout, target_pid_to_str (inferior_ptid));
ui_out_text (uiout, ")]");
/* Note that we can't reach this with an exited thread, due to the
thread_alive check above. */
- if (tp->state_ == THREAD_RUNNING)
+ if (tp->state == THREAD_RUNNING)
ui_out_text (uiout, "(running)\n");
else
- print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
+ {
+ ui_out_text (uiout, "\n");
+ print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
+ }
/* Since the current thread may have changed, see if there is any
exited thread we can now delete. */
return GDB_RC_OK;
}
+void
+update_thread_list (void)
+{
+ prune_threads ();
+ target_find_new_threads ();
+}
+
+/* Return a new value for the selected thread's id. Return a value of 0 if
+ no thread is selected, or no threads exist. */
+
+static struct value *
+thread_id_make_value (struct gdbarch *gdbarch, struct internalvar *var,
+ void *ignore)
+{
+ struct thread_info *tp = find_thread_ptid (inferior_ptid);
+
+ return value_from_longest (builtin_type (gdbarch)->builtin_int,
+ (tp ? tp->num : 0));
+}
+
/* Commands with a prefix of `thread'. */
struct cmd_list_element *thread_cmd_list = NULL;
+/* Implementation of `thread' variable. */
+
+static const struct internalvar_funcs thread_funcs =
+{
+ thread_id_make_value,
+ NULL,
+ NULL
+};
+
void
_initialize_thread (void)
{
static struct cmd_list_element *thread_apply_list = NULL;
- struct cmd_list_element *c;
- c = add_info ("threads", info_threads_command,
- _("IDs of currently known threads."));
- set_cmd_async_ok (c);
- set_cmd_no_selected_thread_ok (c);
+ add_info ("threads", info_threads_command,
+ _("Display currently known threads.\n\
+Usage: info threads [ID]...\n\
+Optional arguments are thread IDs with spaces between.\n\
+If no arguments, all threads are displayed."));
- c = add_prefix_cmd ("thread", class_run, thread_command, _("\
+ add_prefix_cmd ("thread", class_run, thread_command, _("\
Use this command to switch between threads.\n\
The new thread ID must be currently known."),
- &thread_cmd_list, "thread ", 1, &cmdlist);
- set_cmd_async_ok (c);
- set_cmd_no_selected_thread_ok (c);
+ &thread_cmd_list, "thread ", 1, &cmdlist);
+
+ add_prefix_cmd ("apply", class_run, thread_apply_command,
+ _("Apply a command to a list of threads."),
+ &thread_apply_list, "thread apply ", 1, &thread_cmd_list);
- c = add_prefix_cmd ("apply", class_run, thread_apply_command,
- _("Apply a command to a list of threads."),
- &thread_apply_list, "thread apply ", 1, &thread_cmd_list);
- set_cmd_async_ok (c);
- set_cmd_no_selected_thread_ok (c);
+ add_cmd ("all", class_run, thread_apply_all_command,
+ _("Apply a command to all threads."), &thread_apply_list);
- c = add_cmd ("all", class_run, thread_apply_all_command,
- _("Apply a command to all threads."), &thread_apply_list);
- set_cmd_async_ok (c);
- set_cmd_no_selected_thread_ok (c);
+ add_cmd ("name", class_run, thread_name_command,
+ _("Set the current thread's name.\n\
+Usage: thread name [NAME]\n\
+If NAME is not given, then any existing name is removed."), &thread_cmd_list);
+
+ add_cmd ("find", class_run, thread_find_command, _("\
+Find threads that match a regular expression.\n\
+Usage: thread find REGEXP\n\
+Will display thread ids whose name, target ID, or extra info matches REGEXP."),
+ &thread_cmd_list);
if (!xdb_commands)
add_com_alias ("t", "thread", class_run, 1);
NULL,
show_print_thread_events,
&setprintlist, &showprintlist);
+
+ create_internalvar_type_lazy ("_thread", &thread_funcs, NULL);
}
projects / deliverable / binutils-gdb.git / blobdiff