638 lines
15 KiB
C
638 lines
15 KiB
C
/* Multi-process/thread control for GDB, the GNU debugger.
|
|
Copyright 1986, 1987, 1988, 1993, 1998
|
|
|
|
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 "frame.h"
|
|
#include "inferior.h"
|
|
#include "environ.h"
|
|
#include "value.h"
|
|
#include "target.h"
|
|
#include "gdbthread.h"
|
|
#include "command.h"
|
|
#include "gdbcmd.h"
|
|
|
|
#include <ctype.h>
|
|
#include <sys/types.h>
|
|
#include <signal.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 target_thread_vector *target_thread_functions;
|
|
|
|
int
|
|
target_find_new_threads ()
|
|
{
|
|
int retval = 0;
|
|
if (target_thread_functions &&
|
|
target_thread_functions->find_new_threads)
|
|
retval = (*(target_thread_functions->find_new_threads)) ();
|
|
return retval; /* no support */
|
|
}
|
|
|
|
|
|
int
|
|
target_get_thread_info PARAMS ((
|
|
gdb_threadref * ref,
|
|
int selection, /* FIXME: Selection */
|
|
struct gdb_ext_thread_info * info));
|
|
|
|
int
|
|
target_get_thread_info (ref, selection, info)
|
|
|
|
gdb_threadref *ref;
|
|
int selection;
|
|
/* FIXME: Selection */
|
|
struct gdb_ext_thread_info *info;
|
|
|
|
{
|
|
int retval = 0;
|
|
if (target_thread_functions
|
|
&& target_thread_functions->get_thread_info)
|
|
retval = (*(target_thread_functions->get_thread_info)) (ref, selection, info);
|
|
return retval;
|
|
}
|
|
|
|
|
|
/* It is possible that these bind and unbinf functions implement a
|
|
stack the interface allows it, but its not implemented that way
|
|
*/
|
|
|
|
|
|
void
|
|
bind_target_thread_vector (vec)
|
|
struct target_thread_vector *vec;
|
|
{
|
|
target_thread_functions = vec;
|
|
}
|
|
/* Prototypes for exported functions. */
|
|
|
|
struct target_thread_vector *
|
|
unbind_target_thread_vector ()
|
|
{
|
|
struct target_thread_vector *retval;
|
|
retval = target_thread_functions;
|
|
target_thread_functions = 0;
|
|
return retval;
|
|
} /* unbind_target_thread-vector */
|
|
|
|
void _initialize_thread PARAMS ((void));
|
|
|
|
|
|
/* Prototypes for local functions. */
|
|
/* If the host has threads, the host machine definition may
|
|
set this macro. But, for remote thread debugging, it gets more
|
|
complex and setting macros does not bind to the various target
|
|
dependent methods well. So, we use the vector target_thread_functions
|
|
*/
|
|
#if !defined(FIND_NEW_THREADS)
|
|
#define FIND_NEW_THREADS target_find_new_threads
|
|
#endif
|
|
|
|
static struct thread_info *thread_list = NULL;
|
|
static int highest_thread_num;
|
|
|
|
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 struct thread_info *
|
|
find_thread_id PARAMS ((int num));
|
|
|
|
static void
|
|
info_threads_command PARAMS ((char *, int));
|
|
|
|
static void
|
|
restore_current_thread PARAMS ((int));
|
|
|
|
static void
|
|
thread_apply_all_command PARAMS ((char *, int));
|
|
|
|
static void
|
|
thread_apply_command PARAMS ((char *, int));
|
|
|
|
static void info_threads_command PARAMS ((char *, int));
|
|
|
|
static void restore_current_thread PARAMS ((int));
|
|
|
|
static void thread_apply_all_command PARAMS ((char *, int));
|
|
|
|
static void thread_apply_command PARAMS ((char *, int));
|
|
|
|
static int thread_alive PARAMS ((struct thread_info *));
|
|
|
|
void
|
|
init_thread_list ()
|
|
{
|
|
struct thread_info *tp, *tpnext;
|
|
|
|
if (!thread_list)
|
|
return;
|
|
|
|
for (tp = thread_list; tp; tp = tpnext)
|
|
{
|
|
tpnext = tp->next;
|
|
free (tp);
|
|
}
|
|
|
|
thread_list = NULL;
|
|
highest_thread_num = 0;
|
|
}
|
|
|
|
void
|
|
add_thread (pid)
|
|
int pid;
|
|
{
|
|
struct thread_info *tp;
|
|
|
|
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;
|
|
{
|
|
struct thread_info *tp;
|
|
|
|
for (tp = thread_list; tp; tp = tp->next)
|
|
if (tp->num == num)
|
|
return tp;
|
|
|
|
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;
|
|
{
|
|
struct thread_info *tp;
|
|
|
|
for (tp = thread_list; tp; tp = tp->next)
|
|
if (tp->pid == pid)
|
|
return 1;
|
|
|
|
return 0; /* Never heard of 'im */
|
|
}
|
|
|
|
/* 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;
|
|
{
|
|
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;
|
|
|
|
*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;
|
|
}
|
|
|
|
static void
|
|
prune_threads ()
|
|
{
|
|
struct thread_info *tp, *tpprev, *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;
|
|
}
|
|
}
|
|
|
|
/* Print information about currently known threads */
|
|
|
|
static void
|
|
info_threads_command (arg, from_tty)
|
|
char *arg;
|
|
int from_tty;
|
|
{
|
|
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 (tp->pid == current_pid)
|
|
printf_filtered ("* ");
|
|
else
|
|
printf_filtered (" ");
|
|
|
|
printf_filtered ("%d %s ", tp->num, target_pid_to_str (tp->pid));
|
|
|
|
switch_to_thread (tp->pid);
|
|
if (selected_frame)
|
|
print_stack_frame (selected_frame, -1, 0);
|
|
else
|
|
printf_filtered ("[No stack.]\n");
|
|
}
|
|
|
|
switch_to_thread (current_pid);
|
|
}
|
|
|
|
/* Switch from one thread to another. */
|
|
|
|
static void
|
|
switch_to_thread (pid)
|
|
int pid;
|
|
{
|
|
if (pid == inferior_pid)
|
|
return;
|
|
|
|
inferior_pid = pid;
|
|
flush_cached_frames ();
|
|
registers_changed ();
|
|
stop_pc = read_pc();
|
|
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 ((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);
|
|
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 ((make_cleanup_func) restore_current_thread,
|
|
(void *) 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;
|
|
int from_tty;
|
|
{
|
|
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);
|
|
|
|
tp = find_thread_id (num);
|
|
|
|
if (!tp)
|
|
error ("Thread ID %d not known. Use the \"info threads\" command to\n\
|
|
see the IDs of currently known threads.", num);
|
|
|
|
if (!thread_alive (tp))
|
|
error ("Thread ID %d has terminated.\n", num);
|
|
|
|
switch_to_thread (tp->pid);
|
|
if (context_hook)
|
|
context_hook (num);
|
|
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_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);
|
|
}
|