/* Multi-process/thread control for GDB, the GNU debugger.
- Copyright 1986, 1987, 1988, 1993
+ Copyright 1986, 1987, 1988, 1993, 1998, 1999, 2000
Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
Free Software Foundation, Inc.
-This file is part of GDB.
+ This file is part of GDB.
-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
-(at your option) any later version.
+ 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
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ 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. */
+ 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. */
#include "defs.h"
#include "symtab.h"
#include <sys/types.h>
#include <signal.h>
-/*#include "lynxos-core.h"*/
+/*#include "lynxos-core.h" */
-struct thread_info
-{
- struct thread_info *next;
- int pid; /* Actual process id */
- int num; /* Convenient handle */
- CORE_ADDR prev_pc; /* State from wait_for_inferior */
- CORE_ADDR prev_func_start;
- char *prev_func_name;
- struct breakpoint *step_resume_breakpoint;
- struct breakpoint *through_sigtramp_breakpoint;
- CORE_ADDR step_range_start;
- CORE_ADDR step_range_end;
- CORE_ADDR step_frame_address;
- int trap_expected;
- int handling_longjmp;
- int another_trap;
-};
-
-static struct thread_info *thread_list = NULL;
-static int highest_thread_num;
-
-static void
-thread_command PARAMS ((char * tidstr, int from_tty));
+/* Definition of struct thread_info exported to gdbthread.h */
-static void
-prune_threads PARAMS ((void));
-
-static void
-switch_to_thread PARAMS ((int pid));
+/* Prototypes for exported functions. */
-static struct thread_info *
-find_thread_id PARAMS ((int num));
+void _initialize_thread PARAMS ((void));
-static void
-info_threads_command PARAMS ((char *, int));
+/* Prototypes for local functions. */
-static void
-restore_current_thread PARAMS ((int));
+static struct thread_info *thread_list = NULL;
+static int highest_thread_num;
-static void
-thread_apply_all_command PARAMS ((char *, int));
+static struct thread_info *find_thread_id PARAMS ((int num));
-static void
-thread_apply_command PARAMS ((char *, int));
+static void thread_command PARAMS ((char *tidstr, int from_tty));
+static void thread_apply_all_command PARAMS ((char *, int));
+static int thread_alive PARAMS ((struct thread_info *));
+static void info_threads_command PARAMS ((char *, int));
+static void thread_apply_command PARAMS ((char *, int));
+static void restore_current_thread PARAMS ((int));
+static void switch_to_thread PARAMS ((int pid));
+static void prune_threads PARAMS ((void));
void
init_thread_list ()
highest_thread_num = 0;
}
-void
+/* 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 (pid)
int pid;
{
tp->prev_func_name = NULL;
tp->step_range_start = 0;
tp->step_range_end = 0;
- tp->step_frame_address =0;
+ tp->step_frame_address = 0;
tp->step_resume_breakpoint = 0;
tp->through_sigtramp_breakpoint = 0;
tp->handling_longjmp = 0;
tp->trap_expected = 0;
tp->another_trap = 0;
+ tp->stepping_through_solib_after_catch = 0;
+ tp->stepping_through_solib_catchpoints = NULL;
+ tp->stepping_through_sigtramp = 0;
tp->next = thread_list;
+ tp->private = NULL;
thread_list = tp;
+ return tp;
+}
+
+void
+delete_thread (pid)
+ int pid;
+{
+ struct thread_info *tp, *tpprev;
+
+ tpprev = NULL;
+
+ for (tp = thread_list; tp; tpprev = tp, tp = tp->next)
+ if (tp->pid == pid)
+ break;
+
+ if (!tp)
+ return;
+
+ if (tpprev)
+ tpprev->next = tp->next;
+ else
+ thread_list = tp->next;
+
+ /* NOTE: this will take care of any left-over step_resume breakpoints,
+ but not any user-specified thread-specific breakpoints. */
+ if (tp->step_resume_breakpoint)
+ delete_breakpoint (tp->step_resume_breakpoint);
+
+ /* 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)
+ free (tp->private);
+
+ free (tp);
+
+ return;
}
static struct thread_info *
find_thread_id (num)
- int num;
+ int num;
{
struct thread_info *tp;
return NULL;
}
+/* Find a thread_info by matching 'pid'. */
+struct thread_info *
+find_thread_pid (pid)
+ int pid;
+{
+ struct thread_info *tp;
+
+ for (tp = thread_list; tp; tp = tp->next)
+ if (tp->pid == pid)
+ return tp;
+
+ return NULL;
+}
+
+/*
+ * Thread iterator function.
+ *
+ * Calls a callback function once for each thread, so long as
+ * the callback function returns false. If the callback function
+ * returns true, the iteration will end and the current thread
+ * will be returned. This can be useful for implementing a
+ * search for a thread with arbitrary attributes, or for applying
+ * some operation to every thread.
+ *
+ * FIXME: some of the existing functionality, such as
+ * "Thread apply all", might be rewritten using this functionality.
+ */
+
+struct thread_info *
+iterate_over_threads (callback, data)
+ int (*callback) ();
+ void *data;
+{
+ struct thread_info *tp;
+
+ for (tp = thread_list; tp; tp = tp->next)
+ if ((*callback) (tp, data))
+ return tp;
+
+ return NULL;
+}
+
int
valid_thread_id (num)
- int num;
+ int num;
{
struct thread_info *tp;
int
pid_to_thread_id (pid)
- int pid;
+ int pid;
{
struct thread_info *tp;
int
thread_id_to_pid (num)
- int num;
+ int num;
{
struct thread_info *thread = find_thread_id (num);
if (thread)
int
in_thread_list (pid)
- int pid;
+ int pid;
{
struct thread_info *tp;
/* Load infrun state for the thread PID. */
-void load_infrun_state (pid, prev_pc, prev_func_start, prev_func_name,
- trap_expected, step_resume_breakpoint,
- through_sigtramp_breakpoint, step_range_start,
- step_range_end, step_frame_address,
- handling_longjmp, another_trap)
+void
+load_infrun_state (pid, prev_pc, prev_func_start, prev_func_name,
+ trap_expected, step_resume_breakpoint,
+ through_sigtramp_breakpoint, step_range_start,
+ step_range_end, step_frame_address,
+ handling_longjmp, another_trap,
+ stepping_through_solib_after_catch,
+ stepping_through_solib_catchpoints,
+ stepping_through_sigtramp)
int pid;
CORE_ADDR *prev_pc;
CORE_ADDR *prev_func_start;
CORE_ADDR *step_frame_address;
int *handling_longjmp;
int *another_trap;
+ int *stepping_through_solib_after_catch;
+ bpstat *stepping_through_solib_catchpoints;
+ int *stepping_through_sigtramp;
{
struct thread_info *tp;
*handling_longjmp = tp->handling_longjmp;
*trap_expected = tp->trap_expected;
*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;
}
/* Save infrun state for the thread PID. */
-void save_infrun_state (pid, prev_pc, prev_func_start, prev_func_name,
- trap_expected, step_resume_breakpoint,
- through_sigtramp_breakpoint, step_range_start,
- step_range_end, step_frame_address,
- handling_longjmp, another_trap)
+void
+save_infrun_state (pid, prev_pc, prev_func_start, prev_func_name,
+ trap_expected, step_resume_breakpoint,
+ through_sigtramp_breakpoint, step_range_start,
+ step_range_end, step_frame_address,
+ handling_longjmp, another_trap,
+ stepping_through_solib_after_catch,
+ stepping_through_solib_catchpoints,
+ stepping_through_sigtramp)
int pid;
CORE_ADDR prev_pc;
CORE_ADDR prev_func_start;
CORE_ADDR step_frame_address;
int handling_longjmp;
int another_trap;
+ int stepping_through_solib_after_catch;
+ bpstat stepping_through_solib_catchpoints;
+ int stepping_through_sigtramp;
{
struct thread_info *tp;
tp->handling_longjmp = handling_longjmp;
tp->trap_expected = trap_expected;
tp->another_trap = another_trap;
+ 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;
}
/* Return true if TP is an active thread. */
{
if (tp->pid == -1)
return 0;
- if (! target_thread_alive (tp->pid))
+ if (!target_thread_alive (tp->pid))
{
- tp->pid = -1; /* Mark it as dead */
+ tp->pid = -1; /* Mark it as dead */
return 0;
}
return 1;
static void
prune_threads ()
{
- struct thread_info *tp, *tpprev, *next;
+ struct thread_info *tp, *next;
- tpprev = 0;
for (tp = thread_list; tp; tp = next)
{
next = tp->next;
if (!thread_alive (tp))
- {
- if (tpprev)
- tpprev->next = next;
- else
- thread_list = next;
- free (tp);
- }
- else
- tpprev = tp;
+ delete_thread (tp->pid);
}
}
-/* Print information about currently known threads */
+/* 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 (arg, from_tty)
int from_tty;
{
struct thread_info *tp;
- int current_pid = inferior_pid;
+ int current_pid;
+ struct frame_info *cur_frame;
+ int saved_frame_level = selected_frame_level;
+ int counter;
+ char *extra_info;
/* Avoid coredumps which would happen if we tried to access a NULL
selected_frame. */
- if (!target_has_stack) error ("No stack.");
+ if (!target_has_stack)
+ error ("No stack.");
prune_threads ();
+ target_find_new_threads ();
+ current_pid = inferior_pid;
for (tp = thread_list; tp; tp = tp->next)
{
if (tp->pid == current_pid)
else
printf_filtered (" ");
- printf_filtered ("%d %s ", tp->num, target_pid_to_str (tp->pid));
+#ifdef HPUXHPPA
+ printf_filtered ("%d %s", tp->num, target_tid_to_str (tp->pid));
+#else
+ printf_filtered ("%d %s", tp->num, target_pid_to_str (tp->pid));
+#endif
+
+ extra_info = target_extra_thread_info (tp);
+ if (extra_info)
+ printf_filtered (" (%s)", extra_info);
+ puts_filtered (" ");
switch_to_thread (tp->pid);
- print_stack_frame (selected_frame, -1, 0);
+ if (selected_frame)
+ print_only_stack_frame (selected_frame, -1, 0);
+ else
+ printf_filtered ("[No stack.]\n");
}
switch_to_thread (current_pid);
+
+ /* 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 (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 (selected_frame, -1, 0);
+ }
+ else
+ {
+ select_frame (cur_frame, saved_frame_level);
+ }
+
+ /* re-show current frame. */
+ show_stack_frame (cur_frame);
}
/* Switch from one thread to another. */
inferior_pid = pid;
flush_cached_frames ();
registers_changed ();
- stop_pc = read_pc();
+ stop_pc = read_pc ();
select_frame (get_current_frame (), 0);
}
int pid;
{
if (pid != inferior_pid)
- switch_to_thread (pid);
+ {
+ switch_to_thread (pid);
+ print_stack_frame (get_current_frame (), 0, -1);
+ }
}
/* Apply a GDB command to a list of threads. List syntax is a whitespace
seperated list of numbers, or ranges, or the keyword `all'. Ranges consist
of two numbers seperated by a hyphen. Examples:
- 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 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
+ */
static void
thread_apply_all_command (cmd, from_tty)
if (cmd == NULL || *cmd == '\000')
error ("Please specify a command following the thread ID list");
- old_chain = make_cleanup (restore_current_thread, inferior_pid);
+ old_chain = make_cleanup ((make_cleanup_func) restore_current_thread,
+ (void *) inferior_pid);
for (tp = thread_list; tp; tp = tp->next)
if (thread_alive (tp))
{
switch_to_thread (tp->pid);
+#ifdef HPUXHPPA
+ printf_filtered ("\nThread %d (%s):\n",
+ tp->num,
+ target_tid_to_str (inferior_pid));
+#else
printf_filtered ("\nThread %d (%s):\n", tp->num,
target_pid_to_str (inferior_pid));
+#endif
execute_command (cmd, from_tty);
}
}
if (tidlist == NULL || *tidlist == '\000')
error ("Please specify a thread ID list");
- for (cmd = tidlist; *cmd != '\000' && !isalpha(*cmd); cmd++);
+ 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_pid);
+ old_chain = make_cleanup ((make_cleanup_func) restore_current_thread,
+ (void *) inferior_pid);
while (tidlist < cmd)
{
if (*tidlist == '-') /* Got a range of IDs? */
{
- tidlist++; /* Skip the - */
+ tidlist++; /* Skip the - */
end = strtol (tidlist, &p, 10);
if (p == tidlist)
error ("Error parsing %s", tidlist);
else
{
switch_to_thread (tp->pid);
+#ifdef HPUXHPPA
+ printf_filtered ("\nThread %d (%s):\n", tp->num,
+ target_tid_to_str (inferior_pid));
+#else
printf_filtered ("\nThread %d (%s):\n", tp->num,
target_pid_to_str (inferior_pid));
+#endif
execute_command (cmd, from_tty);
}
}
thread_command (tidstr, from_tty)
char *tidstr;
int from_tty;
+{
+ 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_pid),
+#if defined(HPUXHPPA)
+ target_tid_to_str (inferior_pid)
+#else
+ target_pid_to_str (inferior_pid)
+#endif
+ );
+ else
+ error ("No stack.");
+ return;
+ }
+
+ gdb_thread_select (tidstr);
+}
+
+static int
+do_captured_thread_select (void *tidstr)
{
int num;
struct thread_info *tp;
- if (!tidstr)
- error ("Please specify a thread ID. Use the \"info threads\" command to\n\
-see the IDs of currently known threads.");
-
- num = atoi (tidstr);
+ num = atoi ((char *)tidstr);
tp = find_thread_id (num);
switch_to_thread (tp->pid);
- printf_filtered ("[Switching to %s]\n", target_pid_to_str (inferior_pid));
+ printf_filtered ("[Switching to thread %d (%s)]\n",
+ pid_to_thread_id (inferior_pid),
+#if defined(HPUXHPPA)
+ target_tid_to_str (inferior_pid)
+#else
+ target_pid_to_str (inferior_pid)
+#endif
+ );
+
print_stack_frame (selected_frame, selected_frame_level, 1);
+ return GDB_RC_OK;
+}
+
+enum gdb_rc
+gdb_thread_select (char *tidstr)
+{
+ return catch_errors (do_captured_thread_select, tidstr,
+ NULL, RETURN_MASK_ALL);
}
/* Commands with a prefix of `thread'. */
_initialize_thread ()
{
static struct cmd_list_element *thread_apply_list = NULL;
- extern struct cmd_list_element *cmdlist;
add_info ("threads", info_threads_command,
"IDs of currently known threads.");
"Apply a command to all threads.",
&thread_apply_list);
- add_com_alias ("t", "thread", class_run, 1);
+ if (!xdb_commands)
+ add_com_alias ("t", "thread", class_run, 1);
}
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