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