/* Multi-process/thread control for GDB, the GNU debugger.
- Copyright 1986, 1987, 1988, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+ Copyright (C) 1986, 1987, 1988, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ 2000, 2001, 2002, 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "symtab.h"
#include "value.h"
#include "target.h"
#include "gdbthread.h"
+#include "exceptions.h"
#include "command.h"
#include "gdbcmd.h"
#include "regcache.h"
#include <sys/types.h>
#include <signal.h>
#include "ui-out.h"
-
-/*#include "lynxos-core.h" */
+#include "observer.h"
+#include "annotate.h"
+#include "cli/cli-decode.h"
/* Definition of struct thread_info exported to gdbthread.h */
static 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 info_threads_command (char *, int);
static void thread_apply_command (char *, int);
static void restore_current_thread (ptid_t);
-static void switch_to_thread (ptid_t ptid);
static void prune_threads (void);
+/* Frontend view of the thread state. Possible extensions: stepping,
+ finishing, until(ling),... */
+enum thread_state
+{
+ THREAD_STOPPED,
+ THREAD_RUNNING,
+ THREAD_EXITED,
+};
+
+static enum thread_state main_thread_state = THREAD_STOPPED;
+static int main_thread_executing = 0;
+
void
delete_step_resume_breakpoint (void *arg)
{
}
static void
-free_thread (struct thread_info *tp)
+clear_thread_inferior_resources (struct thread_info *tp)
{
/* NOTE: this will take care of any left-over step_resume breakpoints,
- but not any user-specified thread-specific breakpoints. */
+ 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)
- delete_breakpoint (tp->step_resume_breakpoint);
+ {
+ tp->step_resume_breakpoint->disposition = disp_del_at_next_stop;
+ tp->step_resume_breakpoint = NULL;
+ }
+
+ bpstat_clear (&tp->stop_bpstat);
+}
+
+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? */
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;
}
-/* add_thread now returns a pointer to the new thread_info,
- so that back_ends can initialize their private data. */
-
struct thread_info *
-add_thread (ptid_t ptid)
+add_thread_silent (ptid_t ptid)
{
struct thread_info *tp;
+ tp = find_thread_pid (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.
+ The OS is reusing this id --- delete it, and recreate a new
+ 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. */
+
+ 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);
+
+ /* 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. */
+ tp->ptid = ptid;
+ switch_to_thread (ptid);
+
+ observer_notify_new_thread (tp);
+
+ /* All done. */
+ return tp;
+ }
+ else
+ /* Just go ahead and delete it. */
+ 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;
+
+ observer_notify_new_thread (tp);
+
return tp;
}
-void
-delete_thread (ptid_t ptid)
+struct thread_info *
+add_thread_with_info (ptid_t ptid, struct private_thread_info *private)
+{
+ struct thread_info *result = add_thread_silent (ptid);
+
+ result->private = private;
+
+ if (print_thread_events)
+ printf_unfiltered (_("[New %s]\n"), target_pid_to_str (ptid));
+
+ annotate_new_thread ();
+ return result;
+}
+
+struct thread_info *
+add_thread (ptid_t ptid)
+{
+ return add_thread_with_info (ptid, NULL);
+}
+
+/* Delete thread PTID. If SILENT, don't notify the observer of this
+ exit. */
+static void
+delete_thread_1 (ptid_t ptid, int silent)
{
struct thread_info *tp, *tpprev;
if (!tp)
return;
+ /* If this is the current thread, or there's code out there that
+ relies on it existing (refcount > 0) we can't delete yet. Mark
+ it as exited, and notify it. */
+ if (tp->refcount > 0
+ || ptid_equal (tp->ptid, inferior_ptid))
+ {
+ if (tp->state_ != THREAD_EXITED)
+ {
+ if (!silent)
+ observer_notify_thread_exit (tp);
+
+ /* Tag it as exited. */
+ tp->state_ = THREAD_EXITED;
+
+ /* Clear breakpoints, etc. associated with this thread. */
+ clear_thread_inferior_resources (tp);
+ }
+
+ /* Will be really deleted some other time. */
+ return;
+ }
+
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);
}
-static struct thread_info *
+/* Delete thread PTID and notify of thread exit. If this is
+ inferior_ptid, don't actually delete it, but tag it as exited and
+ do the notification. If PTID is the user selected thread, clear
+ it. */
+void
+delete_thread (ptid_t ptid)
+{
+ delete_thread_1 (ptid, 0 /* not silent */);
+}
+
+void
+delete_thread_silent (ptid_t ptid)
+{
+ delete_thread_1 (ptid, 1 /* silent */);
+}
+
+struct thread_info *
find_thread_id (int num)
{
struct thread_info *tp;
iterate_over_threads (int (*callback) (struct thread_info *, void *),
void *data)
{
+ struct thread_info *tp, *next;
+
+ for (tp = thread_list; tp; tp = next)
+ {
+ next = tp->next;
+ if ((*callback) (tp, data))
+ return tp;
+ }
+
+ return NULL;
+}
+
+int
+thread_count (void)
+{
+ int result = 0;
struct thread_info *tp;
for (tp = thread_list; tp; tp = tp->next)
- if ((*callback) (tp, data))
- return tp;
+ ++result;
- return NULL;
+ return result;
}
int
/* Print a list of thread ids currently known, and the total number of
threads. To be used from within catch_errors. */
-static int
-do_captured_list_thread_ids (struct ui_out *uiout,
- void *arg)
+static int
+do_captured_list_thread_ids (struct ui_out *uiout, void *arg)
{
struct thread_info *tp;
int num = 0;
+ struct cleanup *cleanup_chain;
- ui_out_tuple_begin (uiout, "thread-ids");
+ prune_threads ();
+ target_find_new_threads ();
+
+ 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)
+ continue;
num++;
ui_out_field_int (uiout, "thread-id", tp->num);
}
- ui_out_tuple_end (uiout);
+ do_cleanups (cleanup_chain);
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. */
enum gdb_rc
-gdb_list_thread_ids (struct ui_out *uiout)
+gdb_list_thread_ids (struct ui_out *uiout, char **error_message)
{
- return catch_exceptions (uiout, do_captured_list_thread_ids, NULL,
- NULL, RETURN_MASK_ALL);
+ if (catch_exceptions_with_msg (uiout, do_captured_list_thread_ids, NULL,
+ error_message, RETURN_MASK_ALL) < 0)
+ return GDB_RC_FAIL;
+ return GDB_RC_OK;
}
/* Load infrun state for the thread PID. */
void
-load_infrun_state (ptid_t ptid,
- CORE_ADDR *prev_pc,
- CORE_ADDR *prev_func_start,
- char **prev_func_name,
+load_infrun_state (ptid_t ptid,
+ CORE_ADDR *prev_pc,
int *trap_expected,
struct breakpoint **step_resume_breakpoint,
- struct breakpoint **through_sigtramp_breakpoint,
- CORE_ADDR *step_range_start,
+ CORE_ADDR *step_range_start,
CORE_ADDR *step_range_end,
- struct frame_id *step_frame_id,
- int *handling_longjmp,
- int *another_trap,
+ struct frame_id *step_frame_id,
+ int *stepping_over_breakpoint,
int *stepping_through_solib_after_catch,
bpstat *stepping_through_solib_catchpoints,
- int *stepping_through_sigtramp,
- int *current_line,
- struct symtab **current_symtab,
- CORE_ADDR *step_sp)
+ 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;
return;
*prev_pc = tp->prev_pc;
- *prev_func_start = tp->prev_func_start;
- *prev_func_name = tp->prev_func_name;
*trap_expected = tp->trap_expected;
*step_resume_breakpoint = tp->step_resume_breakpoint;
- *through_sigtramp_breakpoint = tp->through_sigtramp_breakpoint;
*step_range_start = tp->step_range_start;
*step_range_end = tp->step_range_end;
*step_frame_id = tp->step_frame_id;
- *handling_longjmp = tp->handling_longjmp;
- *another_trap = tp->another_trap;
- *stepping_through_solib_after_catch = tp->stepping_through_solib_after_catch;
- *stepping_through_solib_catchpoints = tp->stepping_through_solib_catchpoints;
- *stepping_through_sigtramp = tp->stepping_through_sigtramp;
+ *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;
- *step_sp = tp->step_sp;
+
+ /* 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,
- CORE_ADDR prev_func_start,
- char *prev_func_name,
+save_infrun_state (ptid_t ptid,
+ CORE_ADDR prev_pc,
int trap_expected,
struct breakpoint *step_resume_breakpoint,
- struct breakpoint *through_sigtramp_breakpoint,
- CORE_ADDR step_range_start,
+ CORE_ADDR step_range_start,
CORE_ADDR step_range_end,
- const struct frame_id *step_frame_id,
- int handling_longjmp,
- int another_trap,
+ const struct frame_id *step_frame_id,
+ int stepping_over_breakpoint,
int stepping_through_solib_after_catch,
bpstat stepping_through_solib_catchpoints,
- int stepping_through_sigtramp,
int current_line,
struct symtab *current_symtab,
- CORE_ADDR step_sp)
+ 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;
return;
tp->prev_pc = prev_pc;
- tp->prev_func_start = prev_func_start;
- tp->prev_func_name = prev_func_name;
tp->trap_expected = trap_expected;
tp->step_resume_breakpoint = step_resume_breakpoint;
- tp->through_sigtramp_breakpoint = through_sigtramp_breakpoint;
tp->step_range_start = step_range_start;
tp->step_range_end = step_range_end;
tp->step_frame_id = (*step_frame_id);
- tp->handling_longjmp = handling_longjmp;
- tp->another_trap = another_trap;
+ 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->stepping_through_sigtramp = stepping_through_sigtramp;
tp->current_line = current_line;
tp->current_symtab = current_symtab;
- tp->step_sp = step_sp;
+
+ /* 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. */
static int
thread_alive (struct thread_info *tp)
{
- if (PIDGET (tp->ptid) == -1)
+ if (tp->state_ == THREAD_EXITED)
return 0;
if (!target_thread_alive (tp->ptid))
- {
- tp->ptid = pid_to_ptid (-1); /* Mark it as dead */
- return 0;
- }
+ return 0;
return 1;
}
}
}
-/* Print information about currently known threads
+void
+set_running (ptid_t ptid, int running)
+{
+ struct thread_info *tp;
- * 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.
- */
+ 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;
+ }
-static void
-info_threads_command (char *arg, int from_tty)
+ /* 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)
+ {
+ 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);
+ }
+ else
+ {
+ int started = 0;
+ tp = find_thread_pid (ptid);
+ gdb_assert (tp);
+ 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)
+ observer_notify_target_resumed (ptid);
+ }
+}
+
+static int
+is_thread_state (ptid_t ptid, enum thread_state state)
+{
+ struct thread_info *tp;
+
+ if (!target_has_execution)
+ return 0;
+
+ if (!thread_list)
+ return main_thread_state == state;
+
+ tp = find_thread_pid (ptid);
+ gdb_assert (tp);
+ 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);
+}
+
+int
+any_running (void)
+{
+ 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)
+ return 1;
+
+ return 0;
+}
+
+int
+is_executing (ptid_t ptid)
+{
+ struct thread_info *tp;
+
+ if (!target_has_execution)
+ return 0;
+
+ if (!thread_list)
+ return main_thread_executing;
+
+ tp = find_thread_pid (ptid);
+ gdb_assert (tp);
+ return tp->executing_;
+}
+
+void
+set_executing (ptid_t ptid, int executing)
+{
+ struct thread_info *tp;
+
+ if (!thread_list)
+ {
+ /* 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;
+ }
+
+ if (PIDGET (ptid) == -1)
+ {
+ for (tp = thread_list; tp; tp = tp->next)
+ tp->executing_ = executing;
+ }
+ else
+ {
+ tp = find_thread_pid (ptid);
+ gdb_assert (tp);
+ tp->executing_ = executing;
+ }
+}
+
+/* Prints the list of threads and their details on UIOUT.
+ This is a version of 'info_thread_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. */
+void
+print_thread_info (struct ui_out *uiout, int requested_thread)
{
struct thread_info *tp;
ptid_t current_ptid;
- struct frame_info *cur_frame;
- int saved_frame_level = frame_relative_level (deprecated_selected_frame);
- int counter;
+ struct cleanup *old_chain;
char *extra_info;
-
- /* Avoid coredumps which would happen if we tried to access a NULL
- deprecated_selected_frame. */
- if (!target_has_stack)
- error ("No stack.");
+ int current_thread = -1;
prune_threads ();
target_find_new_threads ();
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 (tp = thread_list; tp; tp = tp->next)
{
+ struct cleanup *chain2;
+
+ if (requested_thread != -1 && tp->num != requested_thread)
+ continue;
+
if (ptid_equal (tp->ptid, current_ptid))
- printf_filtered ("* ");
+ current_thread = tp->num;
+
+ 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, "* ");
else
- printf_filtered (" ");
-
-#ifdef HPUXHPPA
- printf_filtered ("%d %s", tp->num, target_tid_to_str (tp->ptid));
-#else
- printf_filtered ("%d %s", tp->num, target_pid_to_str (tp->ptid));
-#endif
-
- extra_info = target_extra_thread_info (tp);
- if (extra_info)
- printf_filtered (" (%s)", extra_info);
- puts_filtered (" ");
-
- switch_to_thread (tp->ptid);
- if (deprecated_selected_frame)
- print_only_stack_frame (deprecated_selected_frame, -1, 0);
+ ui_out_text (uiout, " ");
+
+ 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)
+ {
+ extra_info = target_extra_thread_info (tp);
+ if (extra_info)
+ {
+ ui_out_text (uiout, " (");
+ ui_out_field_string (uiout, "details", extra_info);
+ ui_out_text (uiout, ")");
+ }
+ ui_out_text (uiout, " ");
+ }
+
+ if (tp->state_ == THREAD_RUNNING)
+ ui_out_text (uiout, "(running)\n");
else
- printf_filtered ("[No stack.]\n");
- }
+ {
+ /* The switch below puts us at the top of the stack (leaf
+ frame). */
+ switch_to_thread (tp->ptid);
+ print_stack_frame (get_selected_frame (NULL),
+ /* For MI output, print frame level. */
+ ui_out_is_mi_like_p (uiout),
+ LOCATION);
+ }
- switch_to_thread (current_ptid);
-
- /* Code below copied from "up_silently_base" in "stack.c".
- * It restores the frame set by the user before the "info threads"
- * command. We have finished the info-threads display by switching
- * back to the current thread. That switch has put us at the top
- * of the stack (leaf frame).
- */
- counter = saved_frame_level;
- cur_frame = find_relative_frame (deprecated_selected_frame, &counter);
- if (counter != 0)
- {
- /* Ooops, can't restore, tell user where we are. */
- warning ("Couldn't restore frame in current thread, at frame 0");
- print_stack_frame (deprecated_selected_frame, -1, 0);
+ if (ui_out_is_mi_like_p (uiout))
+ {
+ char *state = "stopped";
+ if (tp->state_ == THREAD_EXITED)
+ state = "exited";
+ else if (tp->state_ == THREAD_RUNNING)
+ state = "running";
+ ui_out_field_string (uiout, "state", state);
+ }
+
+ do_cleanups (chain2);
}
- else
+
+ /* Restores the current thread and the frame selected before
+ the "info threads" command. */
+ do_cleanups (old_chain);
+
+ if (requested_thread == -1)
{
- select_frame (cur_frame);
+ gdb_assert (current_thread != -1
+ || !thread_list);
+ if (current_thread != -1 && ui_out_is_mi_like_p (uiout))
+ ui_out_field_int (uiout, "current-thread-id", current_thread);
+
+ if (current_thread != -1 && is_exited (current_ptid))
+ ui_out_message (uiout, 0, "\n\
+The current thread <Thread ID %d> has terminated. See `help thread'.\n",
+ current_thread);
}
+}
- /* re-show current frame. */
- show_stack_frame (cur_frame);
+
+/* 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.
+ */
+
+static void
+info_threads_command (char *arg, int from_tty)
+{
+ print_thread_info (uiout, -1);
}
/* Switch from one thread to another. */
-static void
+void
switch_to_thread (ptid_t ptid)
{
if (ptid_equal (ptid, inferior_ptid))
return;
inferior_ptid = ptid;
- flush_cached_frames ();
+ reinit_frame_cache ();
registers_changed ();
- stop_pc = read_pc ();
- select_frame (get_current_frame ());
+
+ /* 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 ();
+ else
+ stop_pc = ~(CORE_ADDR) 0;
}
static void
restore_current_thread (ptid_t ptid)
{
- if (! ptid_equal (ptid, inferior_ptid))
+ if (!ptid_equal (ptid, inferior_ptid))
{
- switch_to_thread (ptid);
- print_stack_frame (get_current_frame (), 0, -1);
+ if (non_stop)
+ context_switch_to (ptid);
+ else
+ switch_to_thread (ptid);
+ }
+}
+
+static void
+restore_selected_frame (struct frame_id a_frame_id, int frame_level)
+{
+ struct frame_info *frame = NULL;
+ int count;
+
+ gdb_assert (frame_level >= 0);
+
+ /* Restore by level first, check if the frame id is the same as
+ expected. If that fails, try restoring by frame id. If that
+ fails, nothing to do, just warn the user. */
+
+ count = frame_level;
+ 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 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))))
+ {
+ /* Cool, all is fine. */
+ select_frame (frame);
+ return;
+ }
+
+ frame = frame_find_by_id (a_frame_id);
+ if (frame != NULL)
+ {
+ /* Cool, refound it. */
+ select_frame (frame);
+ return;
+ }
+
+ /* Nothing else to do, the frame layout really changed. Select the
+ innermost stack frame. */
+ select_frame (get_current_frame ());
+
+ /* Warn the user. */
+ if (!ui_out_is_mi_like_p (uiout))
+ {
+ 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 (get_selected_frame (NULL), 1, SRC_LINE);
}
}
struct current_thread_cleanup
{
ptid_t inferior_ptid;
+ struct frame_id selected_frame_id;
+ int selected_frame_level;
+ int was_stopped;
};
static void
do_restore_current_thread_cleanup (void *arg)
{
+ struct thread_info *tp;
struct current_thread_cleanup *old = arg;
restore_current_thread (old->inferior_ptid);
+
+ /* The running state of the originally selected thread may have
+ changed, so we have to recheck it here. */
+ if (old->was_stopped
+ && is_stopped (inferior_ptid)
+ && target_has_registers
+ && target_has_stack
+ && target_has_memory)
+ restore_selected_frame (old->selected_frame_id,
+ old->selected_frame_level);
+}
+
+static void
+restore_current_thread_cleanup_dtor (void *arg)
+{
+ struct current_thread_cleanup *old = arg;
+ struct thread_info *tp;
+ tp = find_thread_pid (old->inferior_ptid);
+ if (tp)
+ tp->refcount--;
xfree (old);
}
-static struct cleanup *
-make_cleanup_restore_current_thread (ptid_t inferior_ptid)
+struct cleanup *
+make_cleanup_restore_current_thread (void)
{
- struct current_thread_cleanup *old
- = xmalloc (sizeof (struct current_thread_cleanup));
+ struct thread_info *tp;
+ struct frame_info *frame;
+ struct current_thread_cleanup *old;
+
+ old = xmalloc (sizeof (struct current_thread_cleanup));
old->inferior_ptid = inferior_ptid;
- return make_cleanup (do_restore_current_thread_cleanup, old);
+ 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->selected_frame_id = get_frame_id (frame);
+ old->selected_frame_level = frame_relative_level (frame);
+
+ tp = find_thread_pid (inferior_ptid);
+ if (tp)
+ tp->refcount++;
+
+ return make_cleanup_dtor (do_restore_current_thread_cleanup, old,
+ restore_current_thread_cleanup_dtor);
}
/* Apply a GDB command to a list of threads. List syntax is a whitespace
{
struct thread_info *tp;
struct cleanup *old_chain;
- struct cleanup *saved_cmd_cleanup_chain;
char *saved_cmd;
if (cmd == NULL || *cmd == '\000')
- error ("Please specify a command following the thread ID list");
-
- old_chain = make_cleanup_restore_current_thread (inferior_ptid);
+ error (_("Please specify a command following the thread ID list"));
- /* It is safe to update the thread list now, before
- traversing it for "thread apply all". MVS */
+ prune_threads ();
target_find_new_threads ();
+ old_chain = make_cleanup_restore_current_thread ();
+
/* Save a copy of the command in case it is clobbered by
execute_command */
saved_cmd = xstrdup (cmd);
- saved_cmd_cleanup_chain = make_cleanup (xfree, (void *) saved_cmd);
+ make_cleanup (xfree, saved_cmd);
for (tp = thread_list; tp; tp = tp->next)
if (thread_alive (tp))
{
- switch_to_thread (tp->ptid);
-#ifdef HPUXHPPA
- printf_filtered ("\nThread %d (%s):\n",
- tp->num,
- target_tid_to_str (inferior_ptid));
-#else
- printf_filtered ("\nThread %d (%s):\n", tp->num,
- target_pid_to_str (inferior_ptid));
-#endif
+ if (non_stop)
+ context_switch_to (tp->ptid);
+ 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);
- strcpy (cmd, saved_cmd); /* Restore exact command used previously */
+ strcpy (cmd, saved_cmd); /* Restore exact command used previously */
}
- do_cleanups (saved_cmd_cleanup_chain);
do_cleanups (old_chain);
}
char *cmd;
char *p;
struct cleanup *old_chain;
- struct cleanup *saved_cmd_cleanup_chain;
char *saved_cmd;
if (tidlist == NULL || *tidlist == '\000')
- error ("Please specify a thread ID list");
+ error (_("Please specify a thread ID list"));
for (cmd = tidlist; *cmd != '\000' && !isalpha (*cmd); cmd++);
if (*cmd == '\000')
- error ("Please specify a command following the thread ID list");
-
- old_chain = make_cleanup_restore_current_thread (inferior_ptid);
+ error (_("Please specify a command following the thread ID list"));
/* Save a copy of the command in case it is clobbered by
execute_command */
saved_cmd = xstrdup (cmd);
- saved_cmd_cleanup_chain = make_cleanup (xfree, (void *) saved_cmd);
+ old_chain = make_cleanup (xfree, saved_cmd);
while (tidlist < cmd)
{
struct thread_info *tp;
start = strtol (tidlist, &p, 10);
if (p == tidlist)
- error ("Error parsing %s", tidlist);
+ error (_("Error parsing %s"), tidlist);
tidlist = p;
while (*tidlist == ' ' || *tidlist == '\t')
tidlist++; /* Skip the - */
end = strtol (tidlist, &p, 10);
if (p == tidlist)
- error ("Error parsing %s", tidlist);
+ error (_("Error parsing %s"), tidlist);
tidlist = p;
while (*tidlist == ' ' || *tidlist == '\t')
else
end = start;
+ make_cleanup_restore_current_thread ();
+
for (; start <= end; start++)
{
tp = find_thread_id (start);
if (!tp)
- warning ("Unknown thread %d.", start);
+ warning (_("Unknown thread %d."), start);
else if (!thread_alive (tp))
- warning ("Thread %d has terminated.", start);
+ warning (_("Thread %d has terminated."), start);
else
{
- switch_to_thread (tp->ptid);
-#ifdef HPUXHPPA
- printf_filtered ("\nThread %d (%s):\n", tp->num,
+ if (non_stop)
+ context_switch_to (tp->ptid);
+ else
+ switch_to_thread (tp->ptid);
+
+ printf_filtered (_("\nThread %d (%s):\n"), tp->num,
target_tid_to_str (inferior_ptid));
-#else
- printf_filtered ("\nThread %d (%s):\n", tp->num,
- target_pid_to_str (inferior_ptid));
-#endif
execute_command (cmd, from_tty);
- strcpy (cmd, saved_cmd); /* Restore exact command used previously */
+
+ /* Restore exact command used previously. */
+ strcpy (cmd, saved_cmd);
}
}
}
- do_cleanups (saved_cmd_cleanup_chain);
do_cleanups (old_chain);
}
{
if (!tidstr)
{
- /* Don't generate an error, just say which thread is current. */
if (target_has_stack)
- printf_filtered ("[Current thread is %d (%s)]\n",
- pid_to_thread_id (inferior_ptid),
-#if defined(HPUXHPPA)
- target_tid_to_str (inferior_ptid)
-#else
- target_pid_to_str (inferior_ptid)
-#endif
- );
+ {
+ 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));
+ else
+ printf_filtered (_("[Current thread is %d (%s)]\n"),
+ pid_to_thread_id (inferior_ptid),
+ target_tid_to_str (inferior_ptid));
+ }
else
- error ("No stack.");
+ error (_("No stack."));
return;
}
- gdb_thread_select (uiout, tidstr);
+ annotate_thread_changed ();
+ gdb_thread_select (uiout, tidstr, NULL);
+}
+
+/* Print notices when new threads are attached and detached. */
+int print_thread_events = 1;
+static void
+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"),
+ value);
}
static int
-do_captured_thread_select (struct ui_out *uiout,
- void *tidstr)
+do_captured_thread_select (struct ui_out *uiout, void *tidstr)
{
int num;
struct thread_info *tp;
tp = find_thread_id (num);
if (!tp)
- error ("Thread ID %d not known.", num);
+ error (_("Thread ID %d not known."), num);
if (!thread_alive (tp))
- error ("Thread ID %d has terminated.\n", num);
+ error (_("Thread ID %d has terminated."), num);
- switch_to_thread (tp->ptid);
+ if (non_stop)
+ context_switch_to (tp->ptid);
+ else
+ switch_to_thread (tp->ptid);
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, " (");
-#if defined(HPUXHPPA)
ui_out_text (uiout, target_tid_to_str (inferior_ptid));
-#else
- ui_out_text (uiout, target_pid_to_str (inferior_ptid));
-#endif
ui_out_text (uiout, ")]");
- print_stack_frame (deprecated_selected_frame,
- frame_relative_level (deprecated_selected_frame), 1);
+ /* Note that we can't reach this with an exited thread, due to the
+ thread_alive check above. */
+ if (tp->state_ == THREAD_RUNNING)
+ ui_out_text (uiout, "(running)\n");
+ else
+ 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. */
+ prune_threads ();
+
return GDB_RC_OK;
}
enum gdb_rc
-gdb_thread_select (struct ui_out *uiout,
- char *tidstr)
+gdb_thread_select (struct ui_out *uiout, char *tidstr, char **error_message)
{
- return catch_exceptions (uiout, do_captured_thread_select, tidstr,
- NULL, RETURN_MASK_ALL);
+ if (catch_exceptions_with_msg (uiout, do_captured_thread_select, tidstr,
+ error_message, RETURN_MASK_ALL) < 0)
+ return GDB_RC_FAIL;
+ return GDB_RC_OK;
}
/* Commands with a prefix of `thread'. */
_initialize_thread (void)
{
static struct cmd_list_element *thread_apply_list = NULL;
+ struct cmd_list_element *c;
- add_info ("threads", info_threads_command,
- "IDs of currently known threads.");
+ c = add_info ("threads", info_threads_command,
+ _("IDs of currently known threads."));
+ set_cmd_no_selected_thread_ok (c);
- 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);
+ c = 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_no_selected_thread_ok (c);
- add_prefix_cmd ("apply", class_run, thread_apply_command,
- "Apply a command to a list of threads.",
- &thread_apply_list, "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_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_no_selected_thread_ok (c);
if (!xdb_commands)
add_com_alias ("t", "thread", class_run, 1);
+
+ add_setshow_boolean_cmd ("thread-events", no_class,
+ &print_thread_events, _("\
+Set printing of thread events (such as thread start and exit)."), _("\
+Show printing of thread events (such as thread start and exit)."), NULL,
+ NULL,
+ show_print_thread_events,
+ &setprintlist, &showprintlist);
}
projects / deliverable / binutils-gdb.git / blobdiff