4ff5d55a08
* gdbtk-cmds.c (Gdbtk_Init): Link C variable gdb_context with tcl variable gdb_context_id. * gdbtk-hooks.c (gdbtk_context_change): Implement new hook called context_hook. Called when threads change. * gdbtk.c: Initialize gdb_context. * gdbtk.h: Declare gdb_context. * infrun (wait_for_inferior): Call context_hook. * thread.c (thread_command): Call context_hook. * defs.h: Declare context_hook.
553 lines
13 KiB
C
553 lines
13 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 "gdbthread.h"
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#include "command.h"
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#include "gdbcmd.h"
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#include <ctype.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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CORE_ADDR prev_pc; /* State from wait_for_inferior */
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CORE_ADDR prev_func_start;
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char *prev_func_name;
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struct breakpoint *step_resume_breakpoint;
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struct breakpoint *through_sigtramp_breakpoint;
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CORE_ADDR step_range_start;
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CORE_ADDR step_range_end;
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CORE_ADDR step_frame_address;
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int trap_expected;
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int handling_longjmp;
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int another_trap;
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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
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thread_command PARAMS ((char * tidstr, int from_tty));
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static void
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prune_threads PARAMS ((void));
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static void
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switch_to_thread PARAMS ((int pid));
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static struct thread_info *
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find_thread_id PARAMS ((int num));
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static void
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info_threads_command PARAMS ((char *, int));
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static void
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restore_current_thread PARAMS ((int));
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static void
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thread_apply_all_command PARAMS ((char *, int));
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static void
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thread_apply_command PARAMS ((char *, int));
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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->prev_pc = 0;
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tp->prev_func_start = 0;
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tp->prev_func_name = NULL;
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tp->step_range_start = 0;
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tp->step_range_end = 0;
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tp->step_frame_address =0;
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tp->step_resume_breakpoint = 0;
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tp->through_sigtramp_breakpoint = 0;
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tp->handling_longjmp = 0;
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tp->trap_expected = 0;
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tp->another_trap = 0;
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tp->next = thread_list;
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thread_list = tp;
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}
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void
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delete_thread (pid)
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int pid;
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{
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struct thread_info *tp, *tpprev;
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tpprev = NULL;
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for (tp = thread_list; tp; tpprev = tp, tp = tp->next)
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if (tp->pid == pid)
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break;
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if (!tp)
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return;
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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 = tp->next;
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free (tp);
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return;
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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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thread_id_to_pid (num)
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int num;
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{
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struct thread_info *thread = find_thread_id (num);
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if (thread)
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return thread->pid;
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else
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return -1;
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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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/* Load infrun state for the thread PID. */
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void load_infrun_state (pid, prev_pc, prev_func_start, prev_func_name,
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trap_expected, step_resume_breakpoint,
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through_sigtramp_breakpoint, step_range_start,
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step_range_end, step_frame_address,
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handling_longjmp, another_trap)
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int pid;
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CORE_ADDR *prev_pc;
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CORE_ADDR *prev_func_start;
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char **prev_func_name;
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int *trap_expected;
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struct breakpoint **step_resume_breakpoint;
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struct breakpoint **through_sigtramp_breakpoint;
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CORE_ADDR *step_range_start;
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CORE_ADDR *step_range_end;
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CORE_ADDR *step_frame_address;
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int *handling_longjmp;
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int *another_trap;
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{
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struct thread_info *tp;
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/* If we can't find the thread, then we're debugging a single threaded
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process. No need to do anything in that case. */
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tp = find_thread_id (pid_to_thread_id (pid));
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if (tp == NULL)
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return;
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*prev_pc = tp->prev_pc;
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*prev_func_start = tp->prev_func_start;
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*prev_func_name = tp->prev_func_name;
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*step_resume_breakpoint = tp->step_resume_breakpoint;
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*step_range_start = tp->step_range_start;
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*step_range_end = tp->step_range_end;
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*step_frame_address = tp->step_frame_address;
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*through_sigtramp_breakpoint = tp->through_sigtramp_breakpoint;
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*handling_longjmp = tp->handling_longjmp;
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*trap_expected = tp->trap_expected;
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*another_trap = tp->another_trap;
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}
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/* Save infrun state for the thread PID. */
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void save_infrun_state (pid, prev_pc, prev_func_start, prev_func_name,
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trap_expected, step_resume_breakpoint,
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through_sigtramp_breakpoint, step_range_start,
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step_range_end, step_frame_address,
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handling_longjmp, another_trap)
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int pid;
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CORE_ADDR prev_pc;
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CORE_ADDR prev_func_start;
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char *prev_func_name;
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int trap_expected;
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struct breakpoint *step_resume_breakpoint;
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struct breakpoint *through_sigtramp_breakpoint;
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CORE_ADDR step_range_start;
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CORE_ADDR step_range_end;
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CORE_ADDR step_frame_address;
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int handling_longjmp;
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int another_trap;
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{
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struct thread_info *tp;
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/* If we can't find the thread, then we're debugging a single-threaded
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process. Nothing to do in that case. */
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tp = find_thread_id (pid_to_thread_id (pid));
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if (tp == NULL)
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return;
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tp->prev_pc = prev_pc;
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tp->prev_func_start = prev_func_start;
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tp->prev_func_name = prev_func_name;
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tp->step_resume_breakpoint = step_resume_breakpoint;
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tp->step_range_start = step_range_start;
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tp->step_range_end = step_range_end;
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tp->step_frame_address = step_frame_address;
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tp->through_sigtramp_breakpoint = through_sigtramp_breakpoint;
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tp->handling_longjmp = handling_longjmp;
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tp->trap_expected = trap_expected;
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tp->another_trap = another_trap;
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}
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/* Return true if TP is an active thread. */
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static int
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thread_alive (tp)
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struct thread_info *tp;
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{
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if (tp->pid == -1)
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return 0;
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if (! target_thread_alive (tp->pid))
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{
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tp->pid = -1; /* Mark it as dead */
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return 0;
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}
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return 1;
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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, *next;
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tpprev = 0;
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for (tp = thread_list; tp; tp = next)
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{
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next = tp->next;
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if (!thread_alive (tp))
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{
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if (tpprev)
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tpprev->next = next;
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else
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thread_list = next;
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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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}
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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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/* Avoid coredumps which would happen if we tried to access a NULL
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selected_frame. */
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if (!target_has_stack) error ("No stack.");
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prune_threads ();
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#if defined(FIND_NEW_THREADS)
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FIND_NEW_THREADS ();
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#endif
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for (tp = thread_list; tp; tp = tp->next)
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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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switch_to_thread (tp->pid);
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if (selected_frame)
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print_stack_frame (selected_frame, -1, 0);
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else
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printf_filtered ("[No stack.]\n");
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}
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switch_to_thread (current_pid);
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}
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/* Switch from one thread to another. */
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static void
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switch_to_thread (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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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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switch_to_thread (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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if (thread_alive (tp))
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{
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switch_to_thread (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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warning ("Unknown thread %d.", start);
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else if (!thread_alive (tp))
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warning ("Thread %d has terminated.", start);
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else
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{
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switch_to_thread (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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}
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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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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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if (!thread_alive (tp))
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error ("Thread ID %d has terminated.\n", num);
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switch_to_thread (tp->pid);
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if (context_hook)
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context_hook (num);
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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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/* Commands with a prefix of `thread'. */
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struct cmd_list_element *thread_cmd_list = NULL;
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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_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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