5090e82cca
macro to set process groups. * infptrace.c (child_resume): Temporarily use Lynx PIDGET to specify resumption of all threads. * infrun.c (wait_for_inferior): Fix handling of thread-specific breakpoints for systems where DECR_PC_AFTER_BREAK > 0 (ie: backup PC by the right amount when continuing the thread). * thread.c (thread_apply_command): Add the `thread apply' command to apply a given GDB command to a list of threads.
370 lines
7.9 KiB
C
370 lines
7.9 KiB
C
/* Multi-process/thread control for GDB, the GNU debugger.
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Copyright 1986, 1987, 1988, 1993
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Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include "symtab.h"
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#include "frame.h"
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#include "inferior.h"
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#include "environ.h"
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#include "value.h"
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#include "target.h"
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#include "thread.h"
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#include "command.h"
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#include <sys/types.h>
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#include <signal.h>
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/*#include "lynxos-core.h"*/
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struct thread_info
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{
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struct thread_info *next;
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int pid; /* Actual process id */
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int num; /* Convenient handle */
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};
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static struct thread_info *thread_list = NULL;
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static int highest_thread_num;
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static void thread_command PARAMS ((char * tidstr, int from_tty));
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static void prune_threads PARAMS ((void));
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static void thread_switch PARAMS ((int pid));
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static struct thread_info * find_thread_id PARAMS ((int num));
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void
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init_thread_list ()
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{
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struct thread_info *tp, *tpnext;
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if (!thread_list)
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return;
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for (tp = thread_list; tp; tp = tpnext)
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{
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tpnext = tp->next;
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free (tp);
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}
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thread_list = NULL;
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highest_thread_num = 0;
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}
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void
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add_thread (pid)
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int pid;
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{
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struct thread_info *tp;
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tp = (struct thread_info *) xmalloc (sizeof (struct thread_info));
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tp->pid = pid;
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tp->num = ++highest_thread_num;
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tp->next = thread_list;
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thread_list = tp;
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}
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static struct thread_info *
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find_thread_id (num)
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int num;
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{
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struct thread_info *tp;
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for (tp = thread_list; tp; tp = tp->next)
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if (tp->num == num)
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return tp;
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return NULL;
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}
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int
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valid_thread_id (num)
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int num;
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{
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struct thread_info *tp;
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for (tp = thread_list; tp; tp = tp->next)
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if (tp->num == num)
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return 1;
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return 0;
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}
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int
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pid_to_thread_id (pid)
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int pid;
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{
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struct thread_info *tp;
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for (tp = thread_list; tp; tp = tp->next)
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if (tp->pid == pid)
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return tp->num;
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return 0;
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}
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int
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in_thread_list (pid)
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int pid;
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{
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struct thread_info *tp;
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for (tp = thread_list; tp; tp = tp->next)
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if (tp->pid == pid)
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return 1;
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return 0; /* Never heard of 'im */
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}
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static void
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prune_threads ()
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{
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struct thread_info *tp, *tpprev;
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tpprev = 0;
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for (tp = thread_list; tp; tp = tp->next)
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if (tp->pid == -1)
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{
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if (tpprev)
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tpprev->next = tp->next;
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else
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thread_list = NULL;
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free (tp);
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}
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else
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tpprev = tp;
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}
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/* Print information about currently known threads */
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static void
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info_threads_command (arg, from_tty)
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char *arg;
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int from_tty;
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{
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struct thread_info *tp;
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int current_pid = inferior_pid;
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for (tp = thread_list; tp; tp = tp->next)
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{
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if (target_has_execution
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&& kill (tp->pid, 0) == -1)
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{
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tp->pid = -1; /* Mark it as dead */
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continue;
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}
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if (tp->pid == current_pid)
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printf_filtered ("* ");
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else
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printf_filtered (" ");
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printf_filtered ("%d %s ", tp->num, target_pid_to_str (tp->pid));
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thread_switch (tp->pid);
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print_stack_frame (selected_frame, -1, 0);
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}
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thread_switch (current_pid);
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prune_threads ();
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}
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/* Switch from one thread to another. */
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static void
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thread_switch (pid)
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int pid;
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{
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if (pid == inferior_pid)
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return;
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inferior_pid = pid;
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flush_cached_frames ();
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registers_changed ();
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stop_pc = read_pc();
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set_current_frame (create_new_frame (read_fp (), stop_pc));
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stop_frame_address = FRAME_FP (get_current_frame ());
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select_frame (get_current_frame (), 0);
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}
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static void
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restore_current_thread (pid)
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int pid;
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{
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if (pid != inferior_pid)
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thread_switch (pid);
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}
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/* Apply a GDB command to a list of threads. List syntax is a whitespace
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seperated list of numbers, or ranges, or the keyword `all'. Ranges consist
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of two numbers seperated by a hyphen. Examples:
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thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4
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thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9
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thread apply all p x/i $pc Apply x/i $pc cmd to all threads
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*/
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static void
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thread_apply_all_command (cmd, from_tty)
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char *cmd;
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int from_tty;
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{
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struct thread_info *tp;
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struct cleanup *old_chain;
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if (cmd == NULL || *cmd == '\000')
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error ("Please specify a command following the thread ID list");
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old_chain = make_cleanup (restore_current_thread, inferior_pid);
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for (tp = thread_list; tp; tp = tp->next)
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{
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thread_switch (tp->pid);
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printf_filtered ("\nThread %d (%s):\n", tp->num,
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target_pid_to_str (inferior_pid));
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execute_command (cmd, from_tty);
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}
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}
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static void
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thread_apply_command (tidlist, from_tty)
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char *tidlist;
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int from_tty;
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{
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char *cmd;
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char *p;
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struct cleanup *old_chain;
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if (tidlist == NULL || *tidlist == '\000')
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error ("Please specify a thread ID list");
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for (cmd = tidlist; *cmd != '\000' && !isalpha(*cmd); cmd++);
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if (*cmd == '\000')
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error ("Please specify a command following the thread ID list");
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old_chain = make_cleanup (restore_current_thread, inferior_pid);
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while (tidlist < cmd)
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{
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struct thread_info *tp;
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int start, end;
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start = strtol (tidlist, &p, 10);
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if (p == tidlist)
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error ("Error parsing %s", tidlist);
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tidlist = p;
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while (*tidlist == ' ' || *tidlist == '\t')
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tidlist++;
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if (*tidlist == '-') /* Got a range of IDs? */
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{
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tidlist++; /* Skip the - */
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end = strtol (tidlist, &p, 10);
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if (p == tidlist)
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error ("Error parsing %s", tidlist);
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tidlist = p;
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while (*tidlist == ' ' || *tidlist == '\t')
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tidlist++;
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}
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else
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end = start;
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for (; start <= end; start++)
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{
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tp = find_thread_id (start);
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if (!tp)
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{
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warning ("Unknown thread %d.", start);
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continue;
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}
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thread_switch (tp->pid);
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printf_filtered ("\nThread %d (%s):\n", tp->num,
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target_pid_to_str (inferior_pid));
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execute_command (cmd, from_tty);
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}
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}
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}
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/* Switch to the specified thread. Will dispatch off to thread_apply_command
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if prefix of arg is `apply'. */
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static void
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thread_command (tidstr, from_tty)
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char *tidstr;
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int from_tty;
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{
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int num;
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struct thread_info *tp;
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char *p;
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if (!tidstr)
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error ("Please specify a thread ID. Use the \"info threads\" command to\n\
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see the IDs of currently known threads.");
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num = atoi (tidstr);
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tp = find_thread_id (num);
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if (!tp)
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error ("Thread ID %d not known. Use the \"info threads\" command to\n\
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see the IDs of currently known threads.", num);
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thread_switch (tp->pid);
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printf_filtered ("[Switching to %s]\n", target_pid_to_str (inferior_pid));
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print_stack_frame (selected_frame, selected_frame_level, 1);
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}
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void
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_initialize_thread ()
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{
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static struct cmd_list_element *thread_cmd_list = NULL;
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static struct cmd_list_element *thread_apply_list = NULL;
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extern struct cmd_list_element *cmdlist;
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add_info ("threads", info_threads_command,
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"IDs of currently known threads.");
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add_prefix_cmd ("thread", class_run, thread_command,
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"Use this command to switch between threads.\n\
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The new thread ID must be currently known.", &thread_cmd_list, "thread ", 1,
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&cmdlist);
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add_prefix_cmd ("apply", class_run, thread_apply_command,
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"Apply a command to a list of threads.",
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&thread_apply_list, "apply ", 1, &thread_cmd_list);
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add_cmd ("all", class_run, thread_apply_all_command,
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"Apply a command to all threads.",
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&thread_apply_list);
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add_com_alias ("t", "thread", class_run, 1);
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}
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