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3a1ff0b639
* inferior.c (print_inferior): Align columns left. Remove header for the the "current" column. Rename column "Id" to "Num". Rename column "PID" to "Description". Print if there's no selected inferior. gdb/doc/ * gdb.texinfo (Debugging Multiple Inferiors): Add "info inferiors" small example, and describe its columns. Replace "inferior-id" by "infno" throughout.
505 lines
11 KiB
C
505 lines
11 KiB
C
/* Multi-process control for GDB, the GNU debugger.
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Copyright (C) 2008, 2009 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 3 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, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "inferior.h"
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#include "target.h"
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#include "command.h"
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#include "gdbcmd.h"
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#include "gdbthread.h"
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#include "ui-out.h"
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#include "observer.h"
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#include "gdbthread.h"
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void _initialize_inferiors (void);
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static struct inferior *inferior_list = NULL;
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static int highest_inferior_num;
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/* Print notices on inferior events (attach, detach, etc.), set with
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`set print inferior-events'. */
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static int print_inferior_events = 0;
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struct inferior*
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current_inferior (void)
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{
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struct inferior *inf = find_inferior_pid (ptid_get_pid (inferior_ptid));
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gdb_assert (inf);
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return inf;
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}
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static void
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free_inferior (struct inferior *inf)
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{
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discard_all_inferior_continuations (inf);
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xfree (inf->private);
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xfree (inf);
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}
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void
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init_inferior_list (void)
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{
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struct inferior *inf, *infnext;
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highest_inferior_num = 0;
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if (!inferior_list)
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return;
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for (inf = inferior_list; inf; inf = infnext)
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{
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infnext = inf->next;
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free_inferior (inf);
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}
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inferior_list = NULL;
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}
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struct inferior *
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add_inferior_silent (int pid)
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{
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struct inferior *inf;
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inf = xmalloc (sizeof (*inf));
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memset (inf, 0, sizeof (*inf));
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inf->pid = pid;
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inf->stop_soon = NO_STOP_QUIETLY;
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inf->num = ++highest_inferior_num;
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inf->next = inferior_list;
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inferior_list = inf;
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observer_notify_new_inferior (pid);
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return inf;
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}
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struct inferior *
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add_inferior (int pid)
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{
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struct inferior *inf = add_inferior_silent (pid);
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if (print_inferior_events)
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printf_unfiltered (_("[New inferior %d]\n"), pid);
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return inf;
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}
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struct delete_thread_of_inferior_arg
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{
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int pid;
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int silent;
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};
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static int
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delete_thread_of_inferior (struct thread_info *tp, void *data)
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{
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struct delete_thread_of_inferior_arg *arg = data;
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if (ptid_get_pid (tp->ptid) == arg->pid)
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{
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if (arg->silent)
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delete_thread_silent (tp->ptid);
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else
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delete_thread (tp->ptid);
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}
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return 0;
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}
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/* If SILENT then be quiet -- don't announce a inferior death, or the
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exit of its threads. */
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static void
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delete_inferior_1 (int pid, int silent)
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{
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struct inferior *inf, *infprev;
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struct delete_thread_of_inferior_arg arg = { pid, silent };
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infprev = NULL;
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for (inf = inferior_list; inf; infprev = inf, inf = inf->next)
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if (inf->pid == pid)
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break;
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if (!inf)
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return;
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arg.pid = pid;
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arg.silent = silent;
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iterate_over_threads (delete_thread_of_inferior, &arg);
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/* Notify the observers before removing the inferior from the list,
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so that the observers have a change to look it up. */
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observer_notify_inferior_exit (pid);
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if (infprev)
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infprev->next = inf->next;
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else
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inferior_list = inf->next;
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free_inferior (inf);
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}
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void
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delete_inferior (int pid)
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{
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delete_inferior_1 (pid, 0);
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if (print_inferior_events)
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printf_unfiltered (_("[Inferior %d exited]\n"), pid);
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}
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void
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delete_inferior_silent (int pid)
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{
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delete_inferior_1 (pid, 1);
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}
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void
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detach_inferior (int pid)
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{
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delete_inferior_1 (pid, 1);
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if (print_inferior_events)
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printf_unfiltered (_("[Inferior %d detached]\n"), pid);
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}
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void
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discard_all_inferiors (void)
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{
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struct inferior *inf, *infnext;
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for (inf = inferior_list; inf; inf = infnext)
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{
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infnext = inf->next;
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delete_inferior_silent (inf->pid);
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}
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}
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static struct inferior *
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find_inferior_id (int num)
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{
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struct inferior *inf;
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for (inf = inferior_list; inf; inf = inf->next)
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if (inf->num == num)
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return inf;
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return NULL;
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}
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struct inferior *
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find_inferior_pid (int pid)
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{
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struct inferior *inf;
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for (inf = inferior_list; inf; inf = inf->next)
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if (inf->pid == pid)
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return inf;
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return NULL;
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}
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struct inferior *
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iterate_over_inferiors (int (*callback) (struct inferior *, void *),
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void *data)
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{
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struct inferior *inf, *infnext;
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for (inf = inferior_list; inf; inf = infnext)
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{
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infnext = inf->next;
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if ((*callback) (inf, data))
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return inf;
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}
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return NULL;
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}
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int
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valid_gdb_inferior_id (int num)
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{
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struct inferior *inf;
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for (inf = inferior_list; inf; inf = inf->next)
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if (inf->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_gdb_inferior_id (int pid)
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{
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struct inferior *inf;
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for (inf = inferior_list; inf; inf = inf->next)
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if (inf->pid == pid)
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return inf->num;
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return 0;
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}
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int
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gdb_inferior_id_to_pid (int num)
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{
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struct inferior *inferior = find_inferior_id (num);
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if (inferior)
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return inferior->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_inferior_list (int pid)
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{
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struct inferior *inf;
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for (inf = inferior_list; inf; inf = inf->next)
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if (inf->pid == pid)
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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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have_inferiors (void)
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{
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return inferior_list != NULL;
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}
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int
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have_live_inferiors (void)
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{
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/* The check on stratum suffices, as GDB doesn't currently support
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multiple target interfaces. */
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return (current_target.to_stratum >= process_stratum && have_inferiors ());
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}
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/* Prints the list of inferiors and their details on UIOUT. This is a
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version of 'info_inferior_command' suitable for use from MI.
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If REQUESTED_INFERIOR is not -1, it's the GDB id of the inferior that
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should be printed. Otherwise, all inferiors are printed. */
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void
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print_inferior (struct ui_out *uiout, int requested_inferior)
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{
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struct inferior *inf;
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struct cleanup *old_chain;
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int inf_count = 0;
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/* Compute number of inferiors we will print. */
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for (inf = inferior_list; inf; inf = inf->next)
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{
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struct cleanup *chain2;
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if (requested_inferior != -1 && inf->num != requested_inferior)
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continue;
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++inf_count;
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}
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if (inf_count == 0)
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{
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ui_out_message (uiout, 0, "No inferiors.\n");
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return;
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}
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old_chain = make_cleanup_ui_out_table_begin_end (uiout, 3, inf_count,
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"inferiors");
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ui_out_table_header (uiout, 1, ui_left, "current", "");
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ui_out_table_header (uiout, 4, ui_left, "number", "Num");
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ui_out_table_header (uiout, 17, ui_left, "target-id", "Description");
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ui_out_table_body (uiout);
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for (inf = inferior_list; inf; inf = inf->next)
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{
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struct cleanup *chain2;
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if (requested_inferior != -1 && inf->num != requested_inferior)
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continue;
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chain2 = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
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if (inf->pid == ptid_get_pid (inferior_ptid))
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ui_out_field_string (uiout, "current", "*");
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else
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ui_out_field_skip (uiout, "current");
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ui_out_field_int (uiout, "number", inf->num);
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ui_out_field_string (uiout, "target-id",
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target_pid_to_str (pid_to_ptid (inf->pid)));
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ui_out_text (uiout, "\n");
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do_cleanups (chain2);
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}
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if (inferior_list
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&& ptid_equal (inferior_ptid, null_ptid))
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ui_out_message (uiout, 0, "\n\
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No selected inferior/thread. See `help thread' or `help inferior'.\n");
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do_cleanups (old_chain);
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}
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static void
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detach_inferior_command (char *args, int from_tty)
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{
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int num, pid;
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struct thread_info *tp;
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if (!args || !*args)
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error (_("Requires argument (inferior id to detach)"));
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num = parse_and_eval_long (args);
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if (!valid_gdb_inferior_id (num))
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error (_("Inferior ID %d not known."), num);
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pid = gdb_inferior_id_to_pid (num);
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tp = any_thread_of_process (pid);
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if (!tp)
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error (_("Inferior has no threads."));
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switch_to_thread (tp->ptid);
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detach_command (NULL, from_tty);
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}
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static void
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kill_inferior_command (char *args, int from_tty)
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{
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int num, pid;
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struct thread_info *tp;
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if (!args || !*args)
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error (_("Requires argument (inferior id to kill)"));
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num = parse_and_eval_long (args);
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if (!valid_gdb_inferior_id (num))
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error (_("Inferior ID %d not known."), num);
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pid = gdb_inferior_id_to_pid (num);
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tp = any_thread_of_process (pid);
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if (!tp)
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error (_("Inferior has no threads."));
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switch_to_thread (tp->ptid);
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target_kill ();
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bfd_cache_close_all ();
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}
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static void
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inferior_command (char *args, int from_tty)
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{
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int num, pid;
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if (!have_inferiors ())
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error (_("No inferiors"));
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num = parse_and_eval_long (args);
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if (!valid_gdb_inferior_id (num))
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error (_("Inferior ID %d not known."), num);
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pid = gdb_inferior_id_to_pid (num);
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if (pid != ptid_get_pid (inferior_ptid))
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{
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struct thread_info *tp;
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tp = any_thread_of_process (pid);
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if (!tp)
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error (_("Inferior has no threads."));
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switch_to_thread (tp->ptid);
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}
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printf_filtered (_("[Switching to thread %d (%s)] "),
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pid_to_thread_id (inferior_ptid),
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target_pid_to_str (inferior_ptid));
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if (is_running (inferior_ptid))
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ui_out_text (uiout, "(running)\n");
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else
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{
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ui_out_text (uiout, "\n");
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print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
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}
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}
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/* Print information about currently known inferiors. */
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static void
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info_inferiors_command (char *args, int from_tty)
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{
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int requested = -1;
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if (args && *args)
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{
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requested = parse_and_eval_long (args);
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if (!valid_gdb_inferior_id (requested))
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error (_("Inferior ID %d not known."), requested);
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}
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print_inferior (uiout, requested);
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}
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/* Print notices when new inferiors are created and die. */
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static void
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show_print_inferior_events (struct ui_file *file, int from_tty,
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struct cmd_list_element *c, const char *value)
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{
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fprintf_filtered (file, _("Printing of inferior events is %s.\n"), value);
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}
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void
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_initialize_inferiors (void)
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{
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add_info ("inferiors", info_inferiors_command,
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_("IDs of currently known inferiors."));
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add_setshow_boolean_cmd ("inferior-events", no_class,
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&print_inferior_events, _("\
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Set printing of inferior events (e.g., inferior start and exit)."), _("\
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Show printing of inferior events (e.g., inferior start and exit)."), NULL,
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NULL,
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show_print_inferior_events,
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&setprintlist, &showprintlist);
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add_cmd ("inferior", class_run, detach_inferior_command, _("\
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Detach from inferior ID."),
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&detachlist);
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add_cmd ("inferior", class_run, kill_inferior_command, _("\
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Kill inferior ID."),
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&killlist);
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add_cmd ("inferior", class_run, inferior_command, _("\
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Use this command to switch between inferiors.\n\
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The new inferior ID must be currently known."),
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&cmdlist);
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}
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