[deliverable/binutils-gdb.git] / gdb / thread.c

/* 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 "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 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));

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;
}

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 ();
  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);
      print_stack_frame (selected_frame, -1, 0);
    }

  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 (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;
     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);

  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);
}
Commit	Line	Data
da0baf42 SG	1	/* Multi-process/thread control for GDB, the GNU debugger.
	2	Copyright 1986, 1987, 1988, 1993
	3
	4	Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
	5	Free Software Foundation, Inc.
	6
	7	This file is part of GDB.
	8
	9	This program is free software; you can redistribute it and/or modify
	10	it under the terms of the GNU General Public License as published by
	11	the Free Software Foundation; either version 2 of the License, or
	12	(at your option) any later version.
	13
	14	This program is distributed in the hope that it will be useful,
	15	but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	GNU General Public License for more details.
	18
	19	You should have received a copy of the GNU General Public License
	20	along with this program; if not, write to the Free Software
6c9638b4	21	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25286543 SG	22
	23	#include "defs.h"
	24	#include "symtab.h"
	25	#include "frame.h"
	26	#include "inferior.h"
	27	#include "environ.h"
	28	#include "value.h"
	29	#include "target.h"
fdfa3315	30	#include "gdbthread.h"
46c28185	31	#include "command.h"
89ce0c8f	32	#include "gdbcmd.h"
25286543	33
89ce0c8f	34	#include <ctype.h>
25286543 SG	35	#include <sys/types.h>
	36	#include <signal.h>
	37
	38	/#include "lynxos-core.h"/
	39
	40	struct thread_info
	41	{
	42	struct thread_info *next;
	43	int pid; /* Actual process id */
	44	int num; /* Convenient handle */
88a294b1 JL	45	CORE_ADDR prev_pc; /* State from wait_for_inferior */
	46	CORE_ADDR prev_func_start;
	47	char *prev_func_name;
	48	struct breakpoint *step_resume_breakpoint;
	49	struct breakpoint *through_sigtramp_breakpoint;
	50	CORE_ADDR step_range_start;
	51	CORE_ADDR step_range_end;
	52	CORE_ADDR step_frame_address;
	53	int trap_expected;
	54	int handling_longjmp;
	55	int another_trap;
25286543 SG	56	};
	57
	58	static struct thread_info *thread_list = NULL;
	59	static int highest_thread_num;
	60
b607efe7 FF	61	static void
b607efe7 FF	62	thread_command PARAMS ((char * tidstr, int from_tty));
25286543	63
b607efe7 FF	64	static void
b607efe7 FF	65	prune_threads PARAMS ((void));
25286543	66
b607efe7	67	static void
c889a1eb	68	switch_to_thread PARAMS ((int pid));
25286543	69
b607efe7 FF	70	static struct thread_info *
	71	find_thread_id PARAMS ((int num));
	72
	73	static void
	74	info_threads_command PARAMS ((char *, int));
	75
	76	static void
	77	restore_current_thread PARAMS ((int));
	78
	79	static void
	80	thread_apply_all_command PARAMS ((char *, int));
	81
	82	static void
	83	thread_apply_command PARAMS ((char *, int));
de43d7d0	84
25286543 SG	85	void
	86	init_thread_list ()
	87	{
	88	struct thread_info tp, tpnext;
	89
	90	if (!thread_list)
	91	return;
	92
	93	for (tp = thread_list; tp; tp = tpnext)
	94	{
	95	tpnext = tp->next;
	96	free (tp);
	97	}
	98
	99	thread_list = NULL;
	100	highest_thread_num = 0;
	101	}
	102
	103	void
	104	add_thread (pid)
	105	int pid;
	106	{
	107	struct thread_info *tp;
	108
3082244d	109	tp = (struct thread_info *) xmalloc (sizeof (struct thread_info));
25286543 SG	110
	111	tp->pid = pid;
	112	tp->num = ++highest_thread_num;
88a294b1 JL	113	tp->prev_pc = 0;
	114	tp->prev_func_start = 0;
	115	tp->prev_func_name = NULL;
	116	tp->step_range_start = 0;
	117	tp->step_range_end = 0;
	118	tp->step_frame_address =0;
	119	tp->step_resume_breakpoint = 0;
	120	tp->through_sigtramp_breakpoint = 0;
	121	tp->handling_longjmp = 0;
	122	tp->trap_expected = 0;
	123	tp->another_trap = 0;
25286543 SG	124	tp->next = thread_list;
	125	thread_list = tp;
	126	}
	127
	128	static struct thread_info *
	129	find_thread_id (num)
	130	int num;
	131	{
	132	struct thread_info *tp;
	133
	134	for (tp = thread_list; tp; tp = tp->next)
	135	if (tp->num == num)
	136	return tp;
	137
	138	return NULL;
	139	}
	140
de43d7d0 SG	141	int
	142	valid_thread_id (num)
	143	int num;
	144	{
	145	struct thread_info *tp;
	146
	147	for (tp = thread_list; tp; tp = tp->next)
	148	if (tp->num == num)
	149	return 1;
	150
	151	return 0;
	152	}
	153
	154	int
	155	pid_to_thread_id (pid)
	156	int pid;
	157	{
	158	struct thread_info *tp;
	159
	160	for (tp = thread_list; tp; tp = tp->next)
	161	if (tp->pid == pid)
	162	return tp->num;
	163
	164	return 0;
	165	}
	166
c889a1eb MS	167	int
	168	thread_id_to_pid (num)
	169	int num;
	170	{
	171	struct thread_info *thread = find_thread_id (num);
	172	if (thread)
	173	return thread->pid;
	174	else
	175	return -1;
	176	}
	177
25286543 SG	178	int
	179	in_thread_list (pid)
	180	int pid;
	181	{
	182	struct thread_info *tp;
	183
	184	for (tp = thread_list; tp; tp = tp->next)
	185	if (tp->pid == pid)
	186	return 1;
	187
	188	return 0; /* Never heard of 'im */
	189	}
	190
88a294b1 JL	191	/* Load infrun state for the thread PID. */
	192
	193	void load_infrun_state (pid, prev_pc, prev_func_start, prev_func_name,
	194	trap_expected, step_resume_breakpoint,
	195	through_sigtramp_breakpoint, step_range_start,
	196	step_range_end, step_frame_address,
	197	handling_longjmp, another_trap)
	198	int pid;
	199	CORE_ADDR *prev_pc;
	200	CORE_ADDR *prev_func_start;
	201	char **prev_func_name;
	202	int *trap_expected;
	203	struct breakpoint **step_resume_breakpoint;
	204	struct breakpoint **through_sigtramp_breakpoint;
	205	CORE_ADDR *step_range_start;
	206	CORE_ADDR *step_range_end;
	207	CORE_ADDR *step_frame_address;
	208	int *handling_longjmp;
	209	int *another_trap;
	210	{
	211	struct thread_info *tp;
	212
	213	/* If we can't find the thread, then we're debugging a single threaded
	214	process. No need to do anything in that case. */
	215	tp = find_thread_id (pid_to_thread_id (pid));
	216	if (tp == NULL)
	217	return;
	218
	219	*prev_pc = tp->prev_pc;
	220	*prev_func_start = tp->prev_func_start;
	221	*prev_func_name = tp->prev_func_name;
	222	*step_resume_breakpoint = tp->step_resume_breakpoint;
	223	*step_range_start = tp->step_range_start;
	224	*step_range_end = tp->step_range_end;
	225	*step_frame_address = tp->step_frame_address;
	226	*through_sigtramp_breakpoint = tp->through_sigtramp_breakpoint;
	227	*handling_longjmp = tp->handling_longjmp;
	228	*trap_expected = tp->trap_expected;
	229	*another_trap = tp->another_trap;
	230	}
	231
	232	/* Save infrun state for the thread PID. */
	233
	234	void save_infrun_state (pid, prev_pc, prev_func_start, prev_func_name,
	235	trap_expected, step_resume_breakpoint,
	236	through_sigtramp_breakpoint, step_range_start,
	237	step_range_end, step_frame_address,
	238	handling_longjmp, another_trap)
	239	int pid;
	240	CORE_ADDR prev_pc;
	241	CORE_ADDR prev_func_start;
	242	char *prev_func_name;
	243	int trap_expected;
	244	struct breakpoint *step_resume_breakpoint;
	245	struct breakpoint *through_sigtramp_breakpoint;
	246	CORE_ADDR step_range_start;
	247	CORE_ADDR step_range_end;
	248	CORE_ADDR step_frame_address;
	249	int handling_longjmp;
	250	int another_trap;
	251	{
	252	struct thread_info *tp;
	253
	254	/* If we can't find the thread, then we're debugging a single-threaded
255	process. Nothing to do in that case. */
256	tp = find_thread_id (pid_to_thread_id (pid));
257	if (tp == NULL)
258	return;
259
260	tp->prev_pc = prev_pc;
261	tp->prev_func_start = prev_func_start;
262	tp->prev_func_name = prev_func_name;
263	tp->step_resume_breakpoint = step_resume_breakpoint;
264	tp->step_range_start = step_range_start;
265	tp->step_range_end = step_range_end;
266	tp->step_frame_address = step_frame_address;
267	tp->through_sigtramp_breakpoint = through_sigtramp_breakpoint;
268	tp->handling_longjmp = handling_longjmp;
269	tp->trap_expected = trap_expected;
270	tp->another_trap = another_trap;
271	}
272
2847920a MS	273	/* Return true if TP is an active thread. */
	274	static int
	275	thread_alive (tp)
	276	struct thread_info *tp;
	277	{
	278	if (tp->pid == -1)
	279	return 0;
	280	if (! target_thread_alive (tp->pid))
	281	{
	282	tp->pid = -1; /* Mark it as dead */
	283	return 0;
	284	}
	285	return 1;
	286	}
	287
25286543 SG	288	static void
	289	prune_threads ()
	290	{
2847920a	291	struct thread_info tp, tpprev, *next;
25286543 SG	292
25286543 SG	293	tpprev = 0;
2847920a MS	294	for (tp = thread_list; tp; tp = next)
	295	{
	296	next = tp->next;
	297	if (!thread_alive (tp))
	298	{
	299	if (tpprev)
	300	tpprev->next = next;
	301	else
	302	thread_list = next;
	303	free (tp);
	304	}
	305	else
	306	tpprev = tp;
	307	}
25286543 SG	308	}
	309
	310	/* Print information about currently known threads */
	311
	312	static void
	313	info_threads_command (arg, from_tty)
	314	char *arg;
	315	int from_tty;
	316	{
	317	struct thread_info *tp;
	318	int current_pid = inferior_pid;
	319
4cc1b3f7 JK	320	/* Avoid coredumps which would happen if we tried to access a NULL
	321	selected_frame. */
	322	if (!target_has_stack) error ("No stack.");
	323
2847920a	324	prune_threads ();
25286543 SG	325	for (tp = thread_list; tp; tp = tp->next)
25286543 SG	326	{
25286543 SG	327	if (tp->pid == current_pid)
	328	printf_filtered ("* ");
	329	else
	330	printf_filtered (" ");
	331
	332	printf_filtered ("%d %s ", tp->num, target_pid_to_str (tp->pid));
	333
c889a1eb	334	switch_to_thread (tp->pid);
25286543 SG	335	print_stack_frame (selected_frame, -1, 0);
	336	}
	337
c889a1eb	338	switch_to_thread (current_pid);
25286543 SG	339	}
	340
	341	/* Switch from one thread to another. */
	342
3082244d	343	static void
c889a1eb	344	switch_to_thread (pid)
25286543 SG	345	int pid;
	346	{
	347	if (pid == inferior_pid)
	348	return;
	349
	350	inferior_pid = pid;
25286543 SG	351	flush_cached_frames ();
	352	registers_changed ();
	353	stop_pc = read_pc();
25286543 SG	354	select_frame (get_current_frame (), 0);
	355	}
	356
5090e82c SG	357	static void
	358	restore_current_thread (pid)
	359	int pid;
	360	{
	361	if (pid != inferior_pid)
c889a1eb	362	switch_to_thread (pid);
5090e82c SG	363	}
	364
	365	/* Apply a GDB command to a list of threads. List syntax is a whitespace
	366	seperated list of numbers, or ranges, or the keyword `all'. Ranges consist
	367	of two numbers seperated by a hyphen. Examples:
	368
	369	thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4
	370	thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9
	371	thread apply all p x/i $pc Apply x/i $pc cmd to all threads
	372	*/
	373
	374	static void
	375	thread_apply_all_command (cmd, from_tty)
	376	char *cmd;
	377	int from_tty;
	378	{
	379	struct thread_info *tp;
	380	struct cleanup *old_chain;
	381
	382	if (cmd == NULL \|\| *cmd == '\000')
	383	error ("Please specify a command following the thread ID list");
	384
	385	old_chain = make_cleanup (restore_current_thread, inferior_pid);
	386
	387	for (tp = thread_list; tp; tp = tp->next)
2847920a MS	388	if (thread_alive (tp))
	389	{
	390	switch_to_thread (tp->pid);
	391	printf_filtered ("\nThread %d (%s):\n", tp->num,
	392	target_pid_to_str (inferior_pid));
	393	execute_command (cmd, from_tty);
	394	}
5090e82c SG	395	}
	396
	397	static void
	398	thread_apply_command (tidlist, from_tty)
	399	char *tidlist;
	400	int from_tty;
	401	{
	402	char *cmd;
	403	char *p;
	404	struct cleanup *old_chain;
	405
	406	if (tidlist == NULL \|\| *tidlist == '\000')
	407	error ("Please specify a thread ID list");
	408
	409	for (cmd = tidlist; cmd != '\000' && !isalpha(cmd); cmd++);
	410
	411	if (*cmd == '\000')
	412	error ("Please specify a command following the thread ID list");
	413
	414	old_chain = make_cleanup (restore_current_thread, inferior_pid);
	415
	416	while (tidlist < cmd)
	417	{
	418	struct thread_info *tp;
	419	int start, end;
	420
	421	start = strtol (tidlist, &p, 10);
	422	if (p == tidlist)
	423	error ("Error parsing %s", tidlist);
	424	tidlist = p;
	425
	426	while (tidlist == ' ' \|\| tidlist == '\t')
	427	tidlist++;
	428
	429	if (tidlist == '-') / Got a range of IDs? */
	430	{
	431	tidlist++; /* Skip the - */
	432	end = strtol (tidlist, &p, 10);
	433	if (p == tidlist)
	434	error ("Error parsing %s", tidlist);
	435	tidlist = p;
	436
	437	while (tidlist == ' ' \|\| tidlist == '\t')
	438	tidlist++;
	439	}
	440	else
	441	end = start;
	442
	443	for (; start <= end; start++)
	444	{
	445	tp = find_thread_id (start);
	446
	447	if (!tp)
2847920a MS	448	warning ("Unknown thread %d.", start);
	449	else if (!thread_alive (tp))
	450	warning ("Thread %d has terminated.", start);
	451	else
5090e82c	452	{
2847920a MS	453	switch_to_thread (tp->pid);
	454	printf_filtered ("\nThread %d (%s):\n", tp->num,
	455	target_pid_to_str (inferior_pid));
	456	execute_command (cmd, from_tty);
5090e82c	457	}
5090e82c SG	458	}
	459	}
	460	}
	461
	462	/* Switch to the specified thread. Will dispatch off to thread_apply_command
	463	if prefix of arg is `apply'. */
	464
25286543 SG	465	static void
	466	thread_command (tidstr, from_tty)
	467	char *tidstr;
	468	int from_tty;
	469	{
	470	int num;
	471	struct thread_info *tp;
	472
	473	if (!tidstr)
	474	error ("Please specify a thread ID. Use the \"info threads\" command to\n\
	475	see the IDs of currently known threads.");
	476
25286543 SG	477	num = atoi (tidstr);
	478
	479	tp = find_thread_id (num);
	480
	481	if (!tp)
	482	error ("Thread ID %d not known. Use the \"info threads\" command to\n\
	483	see the IDs of currently known threads.", num);
2847920a MS	484
	485	if (!thread_alive (tp))
	486	error ("Thread ID %d has terminated.\n", num);
25286543	487
c889a1eb	488	switch_to_thread (tp->pid);
25286543 SG	489
	490	printf_filtered ("[Switching to %s]\n", target_pid_to_str (inferior_pid));
	491	print_stack_frame (selected_frame, selected_frame_level, 1);
	492	}
	493
c889a1eb MS	494	/* Commands with a prefix of `thread'. */
	495	struct cmd_list_element *thread_cmd_list = NULL;
	496
25286543 SG	497	void
	498	_initialize_thread ()
	499	{
5090e82c SG	500	static struct cmd_list_element *thread_apply_list = NULL;
	501	extern struct cmd_list_element *cmdlist;
	502
25286543 SG	503	add_info ("threads", info_threads_command,
25286543 SG	504	"IDs of currently known threads.");
5090e82c SG	505
	506	add_prefix_cmd ("thread", class_run, thread_command,
	507	"Use this command to switch between threads.\n\
	508	The new thread ID must be currently known.", &thread_cmd_list, "thread ", 1,
	509	&cmdlist);
	510
	511	add_prefix_cmd ("apply", class_run, thread_apply_command,
	512	"Apply a command to a list of threads.",
	513	&thread_apply_list, "apply ", 1, &thread_cmd_list);
	514
	515	add_cmd ("all", class_run, thread_apply_all_command,
	516	"Apply a command to all threads.",
	517	&thread_apply_list);
	518
	519	add_com_alias ("t", "thread", class_run, 1);
25286543	520	}