| /* Multi-process control for GDB, the GNU debugger. |
| |
| Copyright (C) 2008-2021 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 "exec.h" |
| #include "inferior.h" |
| #include "target.h" |
| #include "command.h" |
| #include "completer.h" |
| #include "gdbcmd.h" |
| #include "gdbthread.h" |
| #include "ui-out.h" |
| #include "observable.h" |
| #include "gdbcore.h" |
| #include "symfile.h" |
| #include "gdbsupport/environ.h" |
| #include "cli/cli-utils.h" |
| #include "arch-utils.h" |
| #include "target-descriptions.h" |
| #include "readline/tilde.h" |
| #include "progspace-and-thread.h" |
| |
| /* Keep a registry of per-inferior data-pointers required by other GDB |
| modules. */ |
| |
| DEFINE_REGISTRY (inferior, REGISTRY_ACCESS_FIELD) |
| |
| intrusive_list<inferior> inferior_list; |
| static int highest_inferior_num; |
| |
| /* See inferior.h. */ |
| bool print_inferior_events = true; |
| |
| /* The Current Inferior. This is a strong reference. I.e., whenever |
| an inferior is the current inferior, its refcount is |
| incremented. */ |
| static inferior_ref current_inferior_; |
| |
| struct inferior* |
| current_inferior (void) |
| { |
| return current_inferior_.get (); |
| } |
| |
| void |
| set_current_inferior (struct inferior *inf) |
| { |
| /* There's always an inferior. */ |
| gdb_assert (inf != NULL); |
| |
| current_inferior_ = inferior_ref::new_reference (inf); |
| } |
| |
| private_inferior::~private_inferior () = default; |
| |
| inferior::~inferior () |
| { |
| inferior *inf = this; |
| |
| m_continuations.clear (); |
| inferior_free_data (inf); |
| target_desc_info_free (inf->tdesc_info); |
| } |
| |
| inferior::inferior (int pid_) |
| : num (++highest_inferior_num), |
| pid (pid_), |
| environment (gdb_environ::from_host_environ ()), |
| registry_data () |
| { |
| inferior_alloc_data (this); |
| |
| m_target_stack.push (get_dummy_target ()); |
| } |
| |
| /* See inferior.h. */ |
| |
| int |
| inferior::unpush_target (struct target_ops *t) |
| { |
| /* If unpushing the process stratum target from the inferior while threads |
| exist in the inferior, ensure that we don't leave any threads of the |
| inferior in the target's "resumed with pending wait status" list. |
| |
| See also the comment in set_thread_exited. */ |
| if (t->stratum () == process_stratum) |
| { |
| process_stratum_target *proc_target = as_process_stratum_target (t); |
| |
| for (thread_info *thread : this->non_exited_threads ()) |
| proc_target->maybe_remove_resumed_with_pending_wait_status (thread); |
| } |
| |
| return m_target_stack.unpush (t); |
| } |
| |
| void |
| inferior::set_tty (std::string terminal_name) |
| { |
| m_terminal = std::move (terminal_name); |
| } |
| |
| const std::string & |
| inferior::tty () |
| { |
| return m_terminal; |
| } |
| |
| void |
| inferior::add_continuation (std::function<void ()> &&cont) |
| { |
| m_continuations.emplace_front (std::move (cont)); |
| } |
| |
| void |
| inferior::do_all_continuations () |
| { |
| while (!m_continuations.empty ()) |
| { |
| auto iter = m_continuations.begin (); |
| (*iter) (); |
| m_continuations.erase (iter); |
| } |
| } |
| |
| struct inferior * |
| add_inferior_silent (int pid) |
| { |
| inferior *inf = new inferior (pid); |
| |
| inferior_list.push_back (*inf); |
| |
| gdb::observers::inferior_added.notify (inf); |
| |
| if (pid != 0) |
| inferior_appeared (inf, pid); |
| |
| return inf; |
| } |
| |
| struct inferior * |
| add_inferior (int pid) |
| { |
| struct inferior *inf = add_inferior_silent (pid); |
| |
| if (print_inferior_events) |
| { |
| if (pid != 0) |
| printf_unfiltered (_("[New inferior %d (%s)]\n"), |
| inf->num, |
| target_pid_to_str (ptid_t (pid)).c_str ()); |
| else |
| printf_unfiltered (_("[New inferior %d]\n"), inf->num); |
| } |
| |
| return inf; |
| } |
| |
| /* See inferior.h. */ |
| |
| void |
| inferior::clear_thread_list (bool silent) |
| { |
| thread_list.clear_and_dispose ([=] (thread_info *thr) |
| { |
| set_thread_exited (thr, silent); |
| if (thr->deletable ()) |
| delete thr; |
| }); |
| ptid_thread_map.clear (); |
| } |
| |
| void |
| delete_inferior (struct inferior *inf) |
| { |
| inf->clear_thread_list (true); |
| |
| auto it = inferior_list.iterator_to (*inf); |
| inferior_list.erase (it); |
| |
| gdb::observers::inferior_removed.notify (inf); |
| |
| /* If this program space is rendered useless, remove it. */ |
| if (inf->pspace->empty ()) |
| delete inf->pspace; |
| |
| delete inf; |
| } |
| |
| /* If SILENT then be quiet -- don't announce a inferior exit, or the |
| exit of its threads. */ |
| |
| static void |
| exit_inferior_1 (struct inferior *inf, int silent) |
| { |
| inf->clear_thread_list (silent); |
| |
| gdb::observers::inferior_exit.notify (inf); |
| |
| inf->pid = 0; |
| inf->fake_pid_p = false; |
| inf->priv = NULL; |
| |
| if (inf->vfork_parent != NULL) |
| { |
| inf->vfork_parent->vfork_child = NULL; |
| inf->vfork_parent = NULL; |
| } |
| if (inf->vfork_child != NULL) |
| { |
| inf->vfork_child->vfork_parent = NULL; |
| inf->vfork_child = NULL; |
| } |
| |
| inf->pending_detach = 0; |
| /* Reset it. */ |
| inf->control = inferior_control_state (NO_STOP_QUIETLY); |
| |
| /* Clear the register cache and the frame cache. */ |
| registers_changed (); |
| reinit_frame_cache (); |
| } |
| |
| void |
| exit_inferior (inferior *inf) |
| { |
| exit_inferior_1 (inf, 0); |
| } |
| |
| void |
| exit_inferior_silent (inferior *inf) |
| { |
| exit_inferior_1 (inf, 1); |
| } |
| |
| /* See inferior.h. */ |
| |
| void |
| detach_inferior (inferior *inf) |
| { |
| /* Save the pid, since exit_inferior_1 will reset it. */ |
| int pid = inf->pid; |
| |
| exit_inferior_1 (inf, 0); |
| |
| if (print_inferior_events) |
| printf_unfiltered (_("[Inferior %d (%s) detached]\n"), |
| inf->num, |
| target_pid_to_str (ptid_t (pid)).c_str ()); |
| } |
| |
| void |
| inferior_appeared (struct inferior *inf, int pid) |
| { |
| /* If this is the first inferior with threads, reset the global |
| thread id. */ |
| delete_exited_threads (); |
| if (!any_thread_p ()) |
| init_thread_list (); |
| |
| inf->pid = pid; |
| inf->has_exit_code = 0; |
| inf->exit_code = 0; |
| |
| gdb::observers::inferior_appeared.notify (inf); |
| } |
| |
| struct inferior * |
| find_inferior_id (int num) |
| { |
| for (inferior *inf : all_inferiors ()) |
| if (inf->num == num) |
| return inf; |
| |
| return NULL; |
| } |
| |
| struct inferior * |
| find_inferior_pid (process_stratum_target *targ, int pid) |
| { |
| /* Looking for inferior pid == 0 is always wrong, and indicative of |
| a bug somewhere else. There may be more than one with pid == 0, |
| for instance. */ |
| gdb_assert (pid != 0); |
| |
| for (inferior *inf : all_inferiors (targ)) |
| if (inf->pid == pid) |
| return inf; |
| |
| return NULL; |
| } |
| |
| /* See inferior.h */ |
| |
| struct inferior * |
| find_inferior_ptid (process_stratum_target *targ, ptid_t ptid) |
| { |
| return find_inferior_pid (targ, ptid.pid ()); |
| } |
| |
| /* See inferior.h. */ |
| |
| struct inferior * |
| find_inferior_for_program_space (struct program_space *pspace) |
| { |
| struct inferior *cur_inf = current_inferior (); |
| |
| if (cur_inf->pspace == pspace) |
| return cur_inf; |
| |
| for (inferior *inf : all_inferiors ()) |
| if (inf->pspace == pspace) |
| return inf; |
| |
| return NULL; |
| } |
| |
| int |
| have_inferiors (void) |
| { |
| for (inferior *inf ATTRIBUTE_UNUSED : all_non_exited_inferiors ()) |
| return 1; |
| |
| return 0; |
| } |
| |
| /* Return the number of live inferiors. We account for the case |
| where an inferior might have a non-zero pid but no threads, as |
| in the middle of a 'mourn' operation. */ |
| |
| int |
| number_of_live_inferiors (process_stratum_target *proc_target) |
| { |
| int num_inf = 0; |
| |
| for (inferior *inf : all_non_exited_inferiors (proc_target)) |
| if (inf->has_execution ()) |
| for (thread_info *tp ATTRIBUTE_UNUSED : inf->non_exited_threads ()) |
| { |
| /* Found a live thread in this inferior, go to the next |
| inferior. */ |
| ++num_inf; |
| break; |
| } |
| |
| return num_inf; |
| } |
| |
| /* Return true if there is at least one live inferior. */ |
| |
| int |
| have_live_inferiors (void) |
| { |
| return number_of_live_inferiors (NULL) > 0; |
| } |
| |
| /* Prune away any unused inferiors, and then prune away no longer used |
| program spaces. */ |
| |
| void |
| prune_inferiors (void) |
| { |
| for (inferior *inf : all_inferiors_safe ()) |
| { |
| if (!inf->deletable () |
| || !inf->removable |
| || inf->pid != 0) |
| continue; |
| |
| delete_inferior (inf); |
| } |
| } |
| |
| /* Simply returns the count of inferiors. */ |
| |
| int |
| number_of_inferiors (void) |
| { |
| auto rng = all_inferiors (); |
| return std::distance (rng.begin (), rng.end ()); |
| } |
| |
| /* Converts an inferior process id to a string. Like |
| target_pid_to_str, but special cases the null process. */ |
| |
| static std::string |
| inferior_pid_to_str (int pid) |
| { |
| if (pid != 0) |
| return target_pid_to_str (ptid_t (pid)); |
| else |
| return _("<null>"); |
| } |
| |
| /* See inferior.h. */ |
| |
| void |
| print_selected_inferior (struct ui_out *uiout) |
| { |
| struct inferior *inf = current_inferior (); |
| const char *filename = inf->pspace->exec_filename.get (); |
| |
| if (filename == NULL) |
| filename = _("<noexec>"); |
| |
| uiout->message (_("[Switching to inferior %d [%s] (%s)]\n"), |
| inf->num, inferior_pid_to_str (inf->pid).c_str (), filename); |
| } |
| |
| /* Helper for print_inferior. Returns the 'connection-id' string for |
| PROC_TARGET. */ |
| |
| static std::string |
| uiout_field_connection (process_stratum_target *proc_target) |
| { |
| if (proc_target == NULL) |
| { |
| return {}; |
| } |
| else if (proc_target->connection_string () != NULL) |
| { |
| return string_printf ("%d (%s %s)", |
| proc_target->connection_number, |
| proc_target->shortname (), |
| proc_target->connection_string ()); |
| } |
| else |
| { |
| return string_printf ("%d (%s)", |
| proc_target->connection_number, |
| proc_target->shortname ()); |
| } |
| } |
| |
| /* 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_INFERIORS is not NULL, it's a list of GDB ids of the |
| inferiors that should be printed. Otherwise, all inferiors are |
| printed. */ |
| |
| static void |
| print_inferior (struct ui_out *uiout, const char *requested_inferiors) |
| { |
| int inf_count = 0; |
| size_t connection_id_len = 20; |
| |
| /* Compute number of inferiors we will print. */ |
| for (inferior *inf : all_inferiors ()) |
| { |
| if (!number_is_in_list (requested_inferiors, inf->num)) |
| continue; |
| |
| std::string conn = uiout_field_connection (inf->process_target ()); |
| if (connection_id_len < conn.size ()) |
| connection_id_len = conn.size (); |
| |
| ++inf_count; |
| } |
| |
| if (inf_count == 0) |
| { |
| uiout->message ("No inferiors.\n"); |
| return; |
| } |
| |
| ui_out_emit_table table_emitter (uiout, 5, inf_count, "inferiors"); |
| uiout->table_header (1, ui_left, "current", ""); |
| uiout->table_header (4, ui_left, "number", "Num"); |
| uiout->table_header (17, ui_left, "target-id", "Description"); |
| uiout->table_header (connection_id_len, ui_left, |
| "connection-id", "Connection"); |
| uiout->table_header (17, ui_left, "exec", "Executable"); |
| |
| uiout->table_body (); |
| |
| /* Restore the current thread after the loop because we switch the |
| inferior in the loop. */ |
| scoped_restore_current_pspace_and_thread restore_pspace_thread; |
| inferior *current_inf = current_inferior (); |
| for (inferior *inf : all_inferiors ()) |
| { |
| if (!number_is_in_list (requested_inferiors, inf->num)) |
| continue; |
| |
| ui_out_emit_tuple tuple_emitter (uiout, NULL); |
| |
| if (inf == current_inf) |
| uiout->field_string ("current", "*"); |
| else |
| uiout->field_skip ("current"); |
| |
| uiout->field_signed ("number", inf->num); |
| |
| /* Because target_pid_to_str uses the current inferior, |
| switch the inferior. */ |
| switch_to_inferior_no_thread (inf); |
| |
| uiout->field_string ("target-id", inferior_pid_to_str (inf->pid)); |
| |
| std::string conn = uiout_field_connection (inf->process_target ()); |
| uiout->field_string ("connection-id", conn); |
| |
| if (inf->pspace->exec_filename != nullptr) |
| uiout->field_string ("exec", inf->pspace->exec_filename.get ()); |
| else |
| uiout->field_skip ("exec"); |
| |
| /* Print extra info that isn't really fit to always present in |
| tabular form. Currently we print the vfork parent/child |
| relationships, if any. */ |
| if (inf->vfork_parent) |
| { |
| uiout->text (_("\n\tis vfork child of inferior ")); |
| uiout->field_signed ("vfork-parent", inf->vfork_parent->num); |
| } |
| if (inf->vfork_child) |
| { |
| uiout->text (_("\n\tis vfork parent of inferior ")); |
| uiout->field_signed ("vfork-child", inf->vfork_child->num); |
| } |
| |
| uiout->text ("\n"); |
| } |
| } |
| |
| static void |
| detach_inferior_command (const char *args, int from_tty) |
| { |
| if (!args || !*args) |
| error (_("Requires argument (inferior id(s) to detach)")); |
| |
| scoped_restore_current_thread restore_thread; |
| |
| number_or_range_parser parser (args); |
| while (!parser.finished ()) |
| { |
| int num = parser.get_number (); |
| |
| inferior *inf = find_inferior_id (num); |
| if (inf == NULL) |
| { |
| warning (_("Inferior ID %d not known."), num); |
| continue; |
| } |
| |
| if (inf->pid == 0) |
| { |
| warning (_("Inferior ID %d is not running."), num); |
| continue; |
| } |
| |
| thread_info *tp = any_thread_of_inferior (inf); |
| if (tp == NULL) |
| { |
| warning (_("Inferior ID %d has no threads."), num); |
| continue; |
| } |
| |
| switch_to_thread (tp); |
| |
| detach_command (NULL, from_tty); |
| } |
| } |
| |
| static void |
| kill_inferior_command (const char *args, int from_tty) |
| { |
| if (!args || !*args) |
| error (_("Requires argument (inferior id(s) to kill)")); |
| |
| scoped_restore_current_thread restore_thread; |
| |
| number_or_range_parser parser (args); |
| while (!parser.finished ()) |
| { |
| int num = parser.get_number (); |
| |
| inferior *inf = find_inferior_id (num); |
| if (inf == NULL) |
| { |
| warning (_("Inferior ID %d not known."), num); |
| continue; |
| } |
| |
| if (inf->pid == 0) |
| { |
| warning (_("Inferior ID %d is not running."), num); |
| continue; |
| } |
| |
| thread_info *tp = any_thread_of_inferior (inf); |
| if (tp == NULL) |
| { |
| warning (_("Inferior ID %d has no threads."), num); |
| continue; |
| } |
| |
| switch_to_thread (tp); |
| |
| target_kill (); |
| } |
| |
| bfd_cache_close_all (); |
| } |
| |
| /* See inferior.h. */ |
| |
| void |
| switch_to_inferior_no_thread (inferior *inf) |
| { |
| set_current_inferior (inf); |
| switch_to_no_thread (); |
| set_current_program_space (inf->pspace); |
| } |
| |
| static void |
| inferior_command (const char *args, int from_tty) |
| { |
| struct inferior *inf; |
| int num; |
| |
| if (args == nullptr) |
| { |
| inf = current_inferior (); |
| gdb_assert (inf != nullptr); |
| const char *filename = inf->pspace->exec_filename.get (); |
| |
| if (filename == nullptr) |
| filename = _("<noexec>"); |
| |
| printf_filtered (_("[Current inferior is %d [%s] (%s)]\n"), |
| inf->num, inferior_pid_to_str (inf->pid).c_str (), |
| filename); |
| } |
| else |
| { |
| num = parse_and_eval_long (args); |
| |
| inf = find_inferior_id (num); |
| if (inf == NULL) |
| error (_("Inferior ID %d not known."), num); |
| |
| if (inf->pid != 0) |
| { |
| if (inf != current_inferior ()) |
| { |
| thread_info *tp = any_thread_of_inferior (inf); |
| if (tp == NULL) |
| error (_("Inferior has no threads.")); |
| |
| switch_to_thread (tp); |
| } |
| |
| gdb::observers::user_selected_context_changed.notify |
| (USER_SELECTED_INFERIOR |
| | USER_SELECTED_THREAD |
| | USER_SELECTED_FRAME); |
| } |
| else |
| { |
| switch_to_inferior_no_thread (inf); |
| |
| gdb::observers::user_selected_context_changed.notify |
| (USER_SELECTED_INFERIOR); |
| } |
| } |
| } |
| |
| /* Print information about currently known inferiors. */ |
| |
| static void |
| info_inferiors_command (const char *args, int from_tty) |
| { |
| print_inferior (current_uiout, args); |
| } |
| |
| /* remove-inferior ID */ |
| |
| static void |
| remove_inferior_command (const char *args, int from_tty) |
| { |
| if (args == NULL || *args == '\0') |
| error (_("Requires an argument (inferior id(s) to remove)")); |
| |
| number_or_range_parser parser (args); |
| while (!parser.finished ()) |
| { |
| int num = parser.get_number (); |
| struct inferior *inf = find_inferior_id (num); |
| |
| if (inf == NULL) |
| { |
| warning (_("Inferior ID %d not known."), num); |
| continue; |
| } |
| |
| if (!inf->deletable ()) |
| { |
| warning (_("Can not remove current inferior %d."), num); |
| continue; |
| } |
| |
| if (inf->pid != 0) |
| { |
| warning (_("Can not remove active inferior %d."), num); |
| continue; |
| } |
| |
| delete_inferior (inf); |
| } |
| } |
| |
| struct inferior * |
| add_inferior_with_spaces (void) |
| { |
| struct address_space *aspace; |
| struct program_space *pspace; |
| struct inferior *inf; |
| |
| /* If all inferiors share an address space on this system, this |
| doesn't really return a new address space; otherwise, it |
| really does. */ |
| aspace = maybe_new_address_space (); |
| pspace = new program_space (aspace); |
| inf = add_inferior (0); |
| inf->pspace = pspace; |
| inf->aspace = pspace->aspace; |
| |
| /* Setup the inferior's initial arch, based on information obtained |
| from the global "set ..." options. */ |
| gdbarch_info info; |
| inf->gdbarch = gdbarch_find_by_info (info); |
| /* The "set ..." options reject invalid settings, so we should |
| always have a valid arch by now. */ |
| gdb_assert (inf->gdbarch != NULL); |
| |
| return inf; |
| } |
| |
| /* Switch to inferior NEW_INF, a new inferior, and unless |
| NO_CONNECTION is true, push the process_stratum_target of ORG_INF |
| to NEW_INF. */ |
| |
| static void |
| switch_to_inferior_and_push_target (inferior *new_inf, |
| bool no_connection, inferior *org_inf) |
| { |
| process_stratum_target *proc_target = org_inf->process_target (); |
| |
| /* Switch over temporarily, while reading executable and |
| symbols. */ |
| switch_to_inferior_no_thread (new_inf); |
| |
| /* Reuse the target for new inferior. */ |
| if (!no_connection && proc_target != NULL) |
| { |
| new_inf->push_target (proc_target); |
| if (proc_target->connection_string () != NULL) |
| printf_filtered (_("Added inferior %d on connection %d (%s %s)\n"), |
| new_inf->num, |
| proc_target->connection_number, |
| proc_target->shortname (), |
| proc_target->connection_string ()); |
| else |
| printf_filtered (_("Added inferior %d on connection %d (%s)\n"), |
| new_inf->num, |
| proc_target->connection_number, |
| proc_target->shortname ()); |
| } |
| else |
| printf_filtered (_("Added inferior %d\n"), new_inf->num); |
| } |
| |
| /* add-inferior [-copies N] [-exec FILENAME] [-no-connection] */ |
| |
| static void |
| add_inferior_command (const char *args, int from_tty) |
| { |
| int i, copies = 1; |
| gdb::unique_xmalloc_ptr<char> exec; |
| symfile_add_flags add_flags = 0; |
| bool no_connection = false; |
| |
| if (from_tty) |
| add_flags |= SYMFILE_VERBOSE; |
| |
| if (args) |
| { |
| gdb_argv built_argv (args); |
| |
| for (char **argv = built_argv.get (); *argv != NULL; argv++) |
| { |
| if (**argv == '-') |
| { |
| if (strcmp (*argv, "-copies") == 0) |
| { |
| ++argv; |
| if (!*argv) |
| error (_("No argument to -copies")); |
| copies = parse_and_eval_long (*argv); |
| } |
| else if (strcmp (*argv, "-no-connection") == 0) |
| no_connection = true; |
| else if (strcmp (*argv, "-exec") == 0) |
| { |
| ++argv; |
| if (!*argv) |
| error (_("No argument to -exec")); |
| exec.reset (tilde_expand (*argv)); |
| } |
| } |
| else |
| error (_("Invalid argument")); |
| } |
| } |
| |
| inferior *orginf = current_inferior (); |
| |
| scoped_restore_current_pspace_and_thread restore_pspace_thread; |
| |
| for (i = 0; i < copies; ++i) |
| { |
| inferior *inf = add_inferior_with_spaces (); |
| |
| switch_to_inferior_and_push_target (inf, no_connection, orginf); |
| |
| if (exec != NULL) |
| { |
| exec_file_attach (exec.get (), from_tty); |
| symbol_file_add_main (exec.get (), add_flags); |
| } |
| } |
| } |
| |
| /* clone-inferior [-copies N] [ID] [-no-connection] */ |
| |
| static void |
| clone_inferior_command (const char *args, int from_tty) |
| { |
| int i, copies = 1; |
| struct inferior *orginf = NULL; |
| bool no_connection = false; |
| |
| if (args) |
| { |
| gdb_argv built_argv (args); |
| |
| char **argv = built_argv.get (); |
| for (; *argv != NULL; argv++) |
| { |
| if (**argv == '-') |
| { |
| if (strcmp (*argv, "-copies") == 0) |
| { |
| ++argv; |
| if (!*argv) |
| error (_("No argument to -copies")); |
| copies = parse_and_eval_long (*argv); |
| |
| if (copies < 0) |
| error (_("Invalid copies number")); |
| } |
| else if (strcmp (*argv, "-no-connection") == 0) |
| no_connection = true; |
| } |
| else |
| { |
| if (orginf == NULL) |
| { |
| int num; |
| |
| /* The first non-option (-) argument specified the |
| program space ID. */ |
| num = parse_and_eval_long (*argv); |
| orginf = find_inferior_id (num); |
| |
| if (orginf == NULL) |
| error (_("Inferior ID %d not known."), num); |
| continue; |
| } |
| else |
| error (_("Invalid argument")); |
| } |
| } |
| } |
| |
| /* If no inferior id was specified, then the user wants to clone the |
| current inferior. */ |
| if (orginf == NULL) |
| orginf = current_inferior (); |
| |
| scoped_restore_current_pspace_and_thread restore_pspace_thread; |
| |
| for (i = 0; i < copies; ++i) |
| { |
| struct address_space *aspace; |
| struct program_space *pspace; |
| struct inferior *inf; |
| |
| /* If all inferiors share an address space on this system, this |
| doesn't really return a new address space; otherwise, it |
| really does. */ |
| aspace = maybe_new_address_space (); |
| pspace = new program_space (aspace); |
| inf = add_inferior (0); |
| inf->pspace = pspace; |
| inf->aspace = pspace->aspace; |
| inf->gdbarch = orginf->gdbarch; |
| |
| switch_to_inferior_and_push_target (inf, no_connection, orginf); |
| |
| /* If the original inferior had a user specified target |
| description, make the clone use it too. */ |
| if (target_desc_info_from_user_p (inf->tdesc_info)) |
| copy_inferior_target_desc_info (inf, orginf); |
| |
| clone_program_space (pspace, orginf->pspace); |
| } |
| } |
| |
| /* 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); |
| } |
| |
| /* Return a new value for the selected inferior's id. */ |
| |
| static struct value * |
| inferior_id_make_value (struct gdbarch *gdbarch, struct internalvar *var, |
| void *ignore) |
| { |
| struct inferior *inf = current_inferior (); |
| |
| return value_from_longest (builtin_type (gdbarch)->builtin_int, inf->num); |
| } |
| |
| /* Implementation of `$_inferior' variable. */ |
| |
| static const struct internalvar_funcs inferior_funcs = |
| { |
| inferior_id_make_value, |
| NULL, |
| NULL |
| }; |
| |
| |
| |
| void |
| initialize_inferiors (void) |
| { |
| struct cmd_list_element *c = NULL; |
| |
| /* There's always one inferior. Note that this function isn't an |
| automatic _initialize_foo function, since other _initialize_foo |
| routines may need to install their per-inferior data keys. We |
| can only allocate an inferior when all those modules have done |
| that. Do this after initialize_progspace, due to the |
| current_program_space reference. */ |
| set_current_inferior (add_inferior_silent (0)); |
| current_inferior_->pspace = current_program_space; |
| current_inferior_->aspace = current_program_space->aspace; |
| /* The architecture will be initialized shortly, by |
| initialize_current_architecture. */ |
| |
| add_info ("inferiors", info_inferiors_command, |
| _("Print a list of inferiors being managed.\n\ |
| Usage: info inferiors [ID]...\n\ |
| If IDs are specified, the list is limited to just those inferiors.\n\ |
| By default all inferiors are displayed.")); |
| |
| c = add_com ("add-inferior", no_class, add_inferior_command, _("\ |
| Add a new inferior.\n\ |
| Usage: add-inferior [-copies N] [-exec FILENAME] [-no-connection]\n\ |
| N is the optional number of inferiors to add, default is 1.\n\ |
| FILENAME is the file name of the executable to use\n\ |
| as main program.\n\ |
| By default, the new inferior inherits the current inferior's connection.\n\ |
| If -no-connection is specified, the new inferior begins with\n\ |
| no target connection yet.")); |
| set_cmd_completer (c, filename_completer); |
| |
| add_com ("remove-inferiors", no_class, remove_inferior_command, _("\ |
| Remove inferior ID (or list of IDs).\n\ |
| Usage: remove-inferiors ID...")); |
| |
| add_com ("clone-inferior", no_class, clone_inferior_command, _("\ |
| Clone inferior ID.\n\ |
| Usage: clone-inferior [-copies N] [-no-connection] [ID]\n\ |
| Add N copies of inferior ID. The new inferiors have the same\n\ |
| executable loaded as the copied inferior. If -copies is not specified,\n\ |
| adds 1 copy. If ID is not specified, it is the current inferior\n\ |
| that is cloned.\n\ |
| By default, the new inferiors inherit the copied inferior's connection.\n\ |
| If -no-connection is specified, the new inferiors begin with\n\ |
| no target connection yet.")); |
| |
| add_cmd ("inferiors", class_run, detach_inferior_command, _("\ |
| Detach from inferior ID (or list of IDS).\n\ |
| Usage; detach inferiors ID..."), |
| &detachlist); |
| |
| add_cmd ("inferiors", class_run, kill_inferior_command, _("\ |
| Kill inferior ID (or list of IDs).\n\ |
| Usage: kill inferiors ID..."), |
| &killlist); |
| |
| add_cmd ("inferior", class_run, inferior_command, _("\ |
| Use this command to switch between inferiors.\n\ |
| Usage: inferior ID\n\ |
| The new inferior ID must be currently known."), |
| &cmdlist); |
| |
| add_setshow_boolean_cmd ("inferior-events", no_class, |
| &print_inferior_events, _("\ |
| Set printing of inferior events (such as inferior start and exit)."), _("\ |
| Show printing of inferior events (such as inferior start and exit)."), NULL, |
| NULL, |
| show_print_inferior_events, |
| &setprintlist, &showprintlist); |
| |
| create_internalvar_type_lazy ("_inferior", &inferior_funcs, NULL); |
| } |