-/* for separate threads within the inferior process, for GDB.
- Copyright (C) 1986, 1987, 1988 Free Software Foundation, Inc.
-
-GDB is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone
-for the consequences of using it or for whether it serves any
-particular purpose or works at all, unless he says so in writing.
-Refer to the GDB General Public License for full details.
-
-Everyone is granted permission to copy, modify and redistribute GDB,
-but only under the conditions described in the GDB General Public
-License. A copy of this license is supposed to have been given to you
-along with GDB so you can know your rights and responsibilities. It
-should be in a file named COPYING. Among other things, the copyright
-notice and this notice must be preserved on all copies.
-
-In other words, go ahead and share GDB, but don't try to stop
-anyone else from sharing it farther. Help stamp out software hoarding!
-*/
+/* Multi-process/thread control for GDB, the GNU debugger.
+ Copyright 1986, 1987, 1988, 1993
+
+ Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
+ Free Software Foundation, Inc.
+
+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 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. */
#include "defs.h"
#include "symtab.h"
#include "environ.h"
#include "value.h"
#include "target.h"
-#include "thread.h"
+#include "gdbthread.h"
+#include "command.h"
+#include "gdbcmd.h"
+#include <ctype.h>
#include <sys/types.h>
#include <signal.h>
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_info PARAMS ((void));
+static void
+thread_command PARAMS ((char * tidstr, int from_tty));
+
+static void
+prune_threads PARAMS ((void));
+
+static void
+switch_to_thread PARAMS ((int pid));
-static void thread_command PARAMS ((char * tidstr, int from_tty));
+static struct thread_info *
+find_thread_id PARAMS ((int num));
-static void prune_threads PARAMS ((void));
+static void
+info_threads_command PARAMS ((char *, int));
-static void thread_switch PARAMS ((int pid));
+static void
+restore_current_thread PARAMS ((int));
+
+static void
+thread_apply_all_command PARAMS ((char *, int));
+
+static void
+thread_apply_command PARAMS ((char *, int));
void
init_thread_list ()
{
struct thread_info *tp;
- tp = xmalloc (sizeof (struct thread_info));
+ tp = (struct thread_info *) xmalloc (sizeof (struct thread_info));
tp->pid = pid;
tp->num = ++highest_thread_num;
+ tp->prev_pc = 0;
+ tp->prev_func_start = 0;
+ tp->prev_func_name = NULL;
+ tp->step_range_start = 0;
+ tp->step_range_end = 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->next = thread_list;
thread_list = 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;
+
+ free (tp);
+
+ return;
+}
+
static struct thread_info *
find_thread_id (num)
int num;
return NULL;
}
+int
+valid_thread_id (num)
+ int num;
+{
+ struct thread_info *tp;
+
+ for (tp = thread_list; tp; tp = tp->next)
+ if (tp->num == num)
+ return 1;
+
+ return 0;
+}
+
+int
+pid_to_thread_id (pid)
+ int pid;
+{
+ struct thread_info *tp;
+
+ for (tp = thread_list; tp; tp = tp->next)
+ if (tp->pid == pid)
+ return tp->num;
+
+ return 0;
+}
+
+int
+thread_id_to_pid (num)
+ int num;
+{
+ struct thread_info *thread = find_thread_id (num);
+ if (thread)
+ return thread->pid;
+ else
+ return -1;
+}
+
int
in_thread_list (pid)
int pid;
return 0; /* Never heard of 'im */
}
-#if 0
-void
-bfd_get_core_threads (abfd)
- bfd *abfd;
+/* 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)
+ int pid;
+ CORE_ADDR *prev_pc;
+ CORE_ADDR *prev_func_start;
+ char **prev_func_name;
+ int *trap_expected;
+ 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 *handling_longjmp;
+ int *another_trap;
{
- int i;
+ 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 (pid));
+ if (tp == NULL)
+ return;
- inferior_pid = BUILDPID (inferior_pid, core_thread (abfd)->pid);
- for (i = 0; i < core_pss (abfd).threadcnt; i++)
- add_thread (core_thread (abfd)[i].pid);
+ *prev_pc = tp->prev_pc;
+ *prev_func_start = tp->prev_func_start;
+ *prev_func_name = tp->prev_func_name;
+ *step_resume_breakpoint = tp->step_resume_breakpoint;
+ *step_range_start = tp->step_range_start;
+ *step_range_end = tp->step_range_end;
+ *step_frame_address = tp->step_frame_address;
+ *through_sigtramp_breakpoint = tp->through_sigtramp_breakpoint;
+ *handling_longjmp = tp->handling_longjmp;
+ *trap_expected = tp->trap_expected;
+ *another_trap = tp->another_trap;
+}
+
+/* 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)
+ int pid;
+ CORE_ADDR prev_pc;
+ CORE_ADDR prev_func_start;
+ char *prev_func_name;
+ int trap_expected;
+ 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 handling_longjmp;
+ int another_trap;
+{
+ 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 (pid));
+ if (tp == NULL)
+ return;
+
+ tp->prev_pc = prev_pc;
+ tp->prev_func_start = prev_func_start;
+ tp->prev_func_name = prev_func_name;
+ tp->step_resume_breakpoint = step_resume_breakpoint;
+ tp->step_range_start = step_range_start;
+ tp->step_range_end = step_range_end;
+ tp->step_frame_address = step_frame_address;
+ tp->through_sigtramp_breakpoint = through_sigtramp_breakpoint;
+ tp->handling_longjmp = handling_longjmp;
+ tp->trap_expected = trap_expected;
+ tp->another_trap = another_trap;
+}
+
+/* Return true if TP is an active thread. */
+static int
+thread_alive (tp)
+ struct thread_info *tp;
+{
+ if (tp->pid == -1)
+ return 0;
+ if (! target_thread_alive (tp->pid))
+ {
+ tp->pid = -1; /* Mark it as dead */
+ return 0;
+ }
+ return 1;
}
-#endif
static void
prune_threads ()
{
- struct thread_info *tp, *tpprev;
+ struct thread_info *tp, *tpprev, *next;
tpprev = 0;
-
- for (tp = thread_list; tp; tp = tp->next)
- if (tp->pid == -1)
- {
- if (tpprev)
- tpprev->next = tp->next;
- else
- thread_list = NULL;
-
- free (tp);
- }
- else
- tpprev = tp;
+ 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;
+ }
}
/* Print information about currently known threads */
struct thread_info *tp;
int current_pid = inferior_pid;
+ /* Avoid coredumps which would happen if we tried to access a NULL
+ selected_frame. */
+ if (!target_has_stack) error ("No stack.");
+
+ prune_threads ();
+#if defined(FIND_NEW_THREADS)
+ FIND_NEW_THREADS ();
+#endif
+
for (tp = thread_list; tp; tp = tp->next)
{
- if (target_has_execution
- && kill (tp->pid, 0) == -1)
- {
- tp->pid == -1; /* Mark it as dead */
- continue;
- }
-
if (tp->pid == current_pid)
printf_filtered ("* ");
else
printf_filtered ("%d %s ", tp->num, target_pid_to_str (tp->pid));
- thread_switch (tp->pid);
- print_stack_frame (selected_frame, -1, 0);
+ switch_to_thread (tp->pid);
+ if (selected_frame)
+ print_stack_frame (selected_frame, -1, 0);
+ else
+ printf_filtered ("[No stack.]\n");
}
- thread_switch (current_pid);
- prune_threads ();
+ switch_to_thread (current_pid);
}
/* Switch from one thread to another. */
-void
-thread_switch (pid)
+static void
+switch_to_thread (pid)
int pid;
{
if (pid == inferior_pid)
return;
inferior_pid = pid;
- pc_changed = 0;
flush_cached_frames ();
registers_changed ();
stop_pc = read_pc();
- set_current_frame (create_new_frame (read_fp (), stop_pc));
- stop_frame_address = FRAME_FP (get_current_frame ());
select_frame (get_current_frame (), 0);
}
+static void
+restore_current_thread (pid)
+ int pid;
+{
+ if (pid != inferior_pid)
+ switch_to_thread (pid);
+}
+
+/* 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
+*/
+
+static void
+thread_apply_all_command (cmd, from_tty)
+ char *cmd;
+ int from_tty;
+{
+ struct thread_info *tp;
+ struct cleanup *old_chain;
+
+ if (cmd == NULL || *cmd == '\000')
+ error ("Please specify a command following the thread ID list");
+
+ old_chain = make_cleanup (restore_current_thread, inferior_pid);
+
+ for (tp = thread_list; tp; tp = tp->next)
+ if (thread_alive (tp))
+ {
+ switch_to_thread (tp->pid);
+ printf_filtered ("\nThread %d (%s):\n", tp->num,
+ target_pid_to_str (inferior_pid));
+ execute_command (cmd, from_tty);
+ }
+}
+
+static void
+thread_apply_command (tidlist, from_tty)
+ char *tidlist;
+ int from_tty;
+{
+ char *cmd;
+ char *p;
+ struct cleanup *old_chain;
+
+ if (tidlist == NULL || *tidlist == '\000')
+ 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_pid);
+
+ while (tidlist < cmd)
+ {
+ struct thread_info *tp;
+ int start, end;
+
+ 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;
+
+ for (; start <= end; 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
+ {
+ switch_to_thread (tp->pid);
+ printf_filtered ("\nThread %d (%s):\n", tp->num,
+ target_pid_to_str (inferior_pid));
+ execute_command (cmd, from_tty);
+ }
+ }
+ }
+}
+
+/* Switch to the specified thread. Will dispatch off to thread_apply_command
+ if prefix of arg is `apply'. */
+
static void
thread_command (tidstr, from_tty)
char *tidstr;
error ("Please specify a thread ID. Use the \"info threads\" command to\n\
see the IDs of currently known threads.");
-
num = atoi (tidstr);
tp = find_thread_id (num);
error ("Thread ID %d not known. Use the \"info threads\" command to\n\
see the IDs of currently known threads.", num);
- thread_switch (tp->pid);
+ if (!thread_alive (tp))
+ error ("Thread ID %d has terminated.\n", num);
+
+ switch_to_thread (tp->pid);
printf_filtered ("[Switching to %s]\n", target_pid_to_str (inferior_pid));
print_stack_frame (selected_frame, selected_frame_level, 1);
}
+/* Commands with a prefix of `thread'. */
+struct cmd_list_element *thread_cmd_list = NULL;
+
void
_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.");
- add_com ("thread", class_info, thread_command,
- "Use this command to switch between threads.\n\
-The new thread ID must be currently known.");
+
+ 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);
+
+ 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);
+
+ add_cmd ("all", class_run, thread_apply_all_command,
+ "Apply a command to all threads.",
+ &thread_apply_list);
+
+ add_com_alias ("t", "thread", class_run, 1);
}
projects / binutils.git / blobdiff