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- /* 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "defs.h"
- #include "symtab.h"
- #include "frame.h"
- #include "inferior.h"
- #include "environ.h"
- #include "value.h"
- #include "target.h"
- #include "thread.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 */
- };
-
- 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 thread_switch PARAMS ((int pid));
-
- static struct thread_info * find_thread_id PARAMS ((int num));
-
- 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->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
- 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 */
- }
-
- static void
- prune_threads ()
- {
- struct thread_info *tp, *tpprev;
-
- 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;
- }
-
- /* 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.");
-
- for (tp = thread_list; tp; tp = tp->next)
- {
- /* FIXME: need to figure out a way to do this for remote too,
- or else the print_stack_frame below will fail with a bogus
- thread ID. */
- if (!STREQ (current_target.to_shortname, "remote")
- && 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 (" ");
-
- printf_filtered ("%d %s ", tp->num, target_pid_to_str (tp->pid));
-
- thread_switch (tp->pid);
- print_stack_frame (selected_frame, -1, 0);
- }
-
- thread_switch (current_pid);
- prune_threads ();
- }
-
- /* Switch from one thread to another. */
-
- static void
- thread_switch (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)
- thread_switch (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)
- {
- thread_switch (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);
- continue;
- }
-
- thread_switch (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);
-
- thread_switch (tp->pid);
-
- printf_filtered ("[Switching to %s]\n", target_pid_to_str (inferior_pid));
- print_stack_frame (selected_frame, selected_frame_level, 1);
- }
-
- void
- _initialize_thread ()
- {
- static struct cmd_list_element *thread_cmd_list = NULL;
- 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);
- }
-