1 /* Memory-access and commands for "inferior" process, for GDB.
3 Copyright (C) 1986-2017 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "arch-utils.h"
36 #include "completer.h"
38 #include "event-top.h"
39 #include "parser-defs.h"
41 #include "reggroups.h"
46 #include "target-descriptions.h"
47 #include "user-regs.h"
48 #include "cli/cli-decode.h"
49 #include "gdbthread.h"
51 #include "inline-frame.h"
52 #include "tracepoint.h"
54 #include "continuations.h"
56 #include "cli/cli-utils.h"
58 #include "thread-fsm.h"
61 #include "common/gdb_optional.h"
63 /* Local functions: */
65 static void info_registers_command (char *, int);
67 static void until_next_command (int);
69 static void until_command (char *, int);
71 static void path_command (char *, int);
73 static void info_float_command (char *, int);
75 static void disconnect_command (char *, int);
77 static void info_program_command (char *, int);
79 static void finish_command (char *, int);
81 static void signal_command (char *, int);
83 static void jump_command (char *, int);
85 static void step_1 (int, int, char *);
87 static void next_command (char *, int);
89 static void step_command (char *, int);
91 static void run_command (char *, int);
93 #define ERROR_NO_INFERIOR \
94 if (!target_has_execution) error (_("The program is not being run."));
96 /* Scratch area where string containing arguments to give to the
97 program will be stored by 'set args'. As soon as anything is
98 stored, notice_args_set will move it into per-inferior storage.
99 Arguments are separated by spaces. Empty string (pointer to '\0')
102 static char *inferior_args_scratch;
104 /* Scratch area where the new cwd will be stored by 'set cwd'. */
106 static char *inferior_cwd_scratch;
108 /* Scratch area where 'set inferior-tty' will store user-provided value.
109 We'll immediate copy it into per-inferior storage. */
111 static char *inferior_io_terminal_scratch;
113 /* Pid of our debugged inferior, or 0 if no inferior now.
114 Since various parts of infrun.c test this to see whether there is a program
115 being debugged it should be nonzero (currently 3 is used) for remote
118 ptid_t inferior_ptid;
120 /* Address at which inferior stopped. */
124 /* Nonzero if stopped due to completion of a stack dummy routine. */
126 enum stop_stack_kind stop_stack_dummy;
128 /* Nonzero if stopped due to a random (unexpected) signal in inferior
131 int stopped_by_random_signal;
133 /* See inferior.h. */
135 int startup_with_shell = 1;
138 /* Accessor routines. */
140 /* Set the io terminal for the current inferior. Ownership of
141 TERMINAL_NAME is not transferred. */
144 set_inferior_io_terminal (const char *terminal_name)
146 xfree (current_inferior ()->terminal);
148 if (terminal_name != NULL && *terminal_name != '\0')
149 current_inferior ()->terminal = xstrdup (terminal_name);
151 current_inferior ()->terminal = NULL;
155 get_inferior_io_terminal (void)
157 return current_inferior ()->terminal;
161 set_inferior_tty_command (char *args, int from_tty,
162 struct cmd_list_element *c)
164 /* CLI has assigned the user-provided value to inferior_io_terminal_scratch.
165 Now route it to current inferior. */
166 set_inferior_io_terminal (inferior_io_terminal_scratch);
170 show_inferior_tty_command (struct ui_file *file, int from_tty,
171 struct cmd_list_element *c, const char *value)
173 /* Note that we ignore the passed-in value in favor of computing it
175 const char *inferior_io_terminal = get_inferior_io_terminal ();
177 if (inferior_io_terminal == NULL)
178 inferior_io_terminal = "";
179 fprintf_filtered (gdb_stdout,
180 _("Terminal for future runs of program being debugged "
181 "is \"%s\".\n"), inferior_io_terminal);
185 get_inferior_args (void)
187 if (current_inferior ()->argc != 0)
191 n = construct_inferior_arguments (current_inferior ()->argc,
192 current_inferior ()->argv);
193 set_inferior_args (n);
197 if (current_inferior ()->args == NULL)
198 current_inferior ()->args = xstrdup ("");
200 return current_inferior ()->args;
203 /* Set the arguments for the current inferior. Ownership of
204 NEWARGS is not transferred. */
207 set_inferior_args (char *newargs)
209 xfree (current_inferior ()->args);
210 current_inferior ()->args = newargs ? xstrdup (newargs) : NULL;
211 current_inferior ()->argc = 0;
212 current_inferior ()->argv = 0;
216 set_inferior_args_vector (int argc, char **argv)
218 current_inferior ()->argc = argc;
219 current_inferior ()->argv = argv;
222 /* Notice when `set args' is run. */
225 set_args_command (char *args, int from_tty, struct cmd_list_element *c)
227 /* CLI has assigned the user-provided value to inferior_args_scratch.
228 Now route it to current inferior. */
229 set_inferior_args (inferior_args_scratch);
232 /* Notice when `show args' is run. */
235 show_args_command (struct ui_file *file, int from_tty,
236 struct cmd_list_element *c, const char *value)
238 /* Note that we ignore the passed-in value in favor of computing it
240 deprecated_show_value_hack (file, from_tty, c, get_inferior_args ());
243 /* See common/common-inferior.h. */
246 set_inferior_cwd (const char *cwd)
248 struct inferior *inf = current_inferior ();
250 gdb_assert (inf != NULL);
255 inf->cwd.reset (xstrdup (cwd));
258 /* See common/common-inferior.h. */
263 return current_inferior ()->cwd.get ();
266 /* Handle the 'set cwd' command. */
269 set_cwd_command (char *args, int from_tty, struct cmd_list_element *c)
271 if (*inferior_cwd_scratch == '\0')
272 set_inferior_cwd (NULL);
274 set_inferior_cwd (inferior_cwd_scratch);
277 /* Handle the 'show cwd' command. */
280 show_cwd_command (struct ui_file *file, int from_tty,
281 struct cmd_list_element *c, const char *value)
283 const char *cwd = get_inferior_cwd ();
286 fprintf_filtered (gdb_stdout,
288 You have not set the inferior's current working directory.\n\
289 The inferior will inherit GDB's cwd if native debugging, or the remote\n\
290 server's cwd if remote debugging.\n"));
292 fprintf_filtered (gdb_stdout,
293 _("Current working directory that will be used "
294 "when starting the inferior is \"%s\".\n"), cwd);
298 /* Compute command-line string given argument vector. This does the
299 same shell processing as fork_inferior. */
302 construct_inferior_arguments (int argc, char **argv)
306 if (startup_with_shell)
309 /* This holds all the characters considered special to the
311 static const char special[] = "\"!&*|[]{}<>?`~^=;, \t\n";
312 static const char quote = '"';
314 /* This holds all the characters considered special to the
315 typical Unix shells. We include `^' because the SunOS
316 /bin/sh treats it as a synonym for `|'. */
317 static const char special[] = "\"!#$&*()\\|[]{}<>?'`~^; \t\n";
318 static const char quote = '\'';
324 /* We over-compute the size. It shouldn't matter. */
325 for (i = 0; i < argc; ++i)
326 length += 3 * strlen (argv[i]) + 1 + 2 * (argv[i][0] == '\0');
328 result = (char *) xmalloc (length);
331 for (i = 0; i < argc; ++i)
336 /* Need to handle empty arguments specially. */
337 if (argv[i][0] == '\0')
347 if (strpbrk (argv[i], special))
353 for (cp = argv[i]; *cp; ++cp)
357 /* A newline cannot be quoted with a backslash (it
358 just disappears), only by putting it inside
369 if (strchr (special, *cp) != NULL)
385 /* In this case we can't handle arguments that contain spaces,
386 tabs, or newlines -- see breakup_args(). */
390 for (i = 0; i < argc; ++i)
392 char *cp = strchr (argv[i], ' ');
394 cp = strchr (argv[i], '\t');
396 cp = strchr (argv[i], '\n');
398 error (_("can't handle command-line "
399 "argument containing whitespace"));
400 length += strlen (argv[i]) + 1;
403 result = (char *) xmalloc (length);
405 for (i = 0; i < argc; ++i)
408 strcat (result, " ");
409 strcat (result, argv[i]);
417 /* This function strips the '&' character (indicating background
418 execution) that is added as *the last* of the arguments ARGS of a
419 command. A copy of the incoming ARGS without the '&' is returned,
420 unless the resulting string after stripping is empty, in which case
421 NULL is returned. *BG_CHAR_P is an output boolean that indicates
422 whether the '&' character was found. */
424 static gdb::unique_xmalloc_ptr<char>
425 strip_bg_char (const char *args, int *bg_char_p)
429 if (args == NULL || *args == '\0')
435 p = args + strlen (args);
439 while (p > args && isspace (p[-1]))
444 return gdb::unique_xmalloc_ptr<char>
445 (savestring (args, p - args));
447 return gdb::unique_xmalloc_ptr<char> (nullptr);
451 return gdb::unique_xmalloc_ptr<char> (xstrdup (args));
454 /* Common actions to take after creating any sort of inferior, by any
455 means (running, attaching, connecting, et cetera). The target
456 should be stopped. */
459 post_create_inferior (struct target_ops *target, int from_tty)
462 /* Be sure we own the terminal in case write operations are performed. */
463 target_terminal::ours_for_output ();
465 /* If the target hasn't taken care of this already, do it now.
466 Targets which need to access registers during to_open,
467 to_create_inferior, or to_attach should do it earlier; but many
469 target_find_description ();
471 /* Now that we know the register layout, retrieve current PC. But
472 if the PC is unavailable (e.g., we're opening a core file with
473 missing registers info), ignore it. */
477 stop_pc = regcache_read_pc (get_current_regcache ());
479 CATCH (ex, RETURN_MASK_ERROR)
481 if (ex.error != NOT_AVAILABLE_ERROR)
482 throw_exception (ex);
488 const unsigned solib_add_generation
489 = current_program_space->solib_add_generation;
491 /* Create the hooks to handle shared library load and unload
493 solib_create_inferior_hook (from_tty);
495 if (current_program_space->solib_add_generation == solib_add_generation)
497 /* The platform-specific hook should load initial shared libraries,
498 but didn't. FROM_TTY will be incorrectly 0 but such solib
499 targets should be fixed anyway. Call it only after the solib
500 target has been initialized by solib_create_inferior_hook. */
503 warning (_("platform-specific solib_create_inferior_hook did "
504 "not load initial shared libraries."));
506 /* If the solist is global across processes, there's no need to
508 if (!gdbarch_has_global_solist (target_gdbarch ()))
509 solib_add (NULL, 0, auto_solib_add);
513 /* If the user sets watchpoints before execution having started,
514 then she gets software watchpoints, because GDB can't know which
515 target will end up being pushed, or if it supports hardware
516 watchpoints or not. breakpoint_re_set takes care of promoting
517 watchpoints to hardware watchpoints if possible, however, if this
518 new inferior doesn't load shared libraries or we don't pull in
519 symbols from any other source on this target/arch,
520 breakpoint_re_set is never called. Call it now so that software
521 watchpoints get a chance to be promoted to hardware watchpoints
522 if the now pushed target supports hardware watchpoints. */
523 breakpoint_re_set ();
525 observer_notify_inferior_created (target, from_tty);
528 /* Kill the inferior if already running. This function is designed
529 to be called when we are about to start the execution of the program
530 from the beginning. Ask the user to confirm that he wants to restart
531 the program being debugged when FROM_TTY is non-null. */
534 kill_if_already_running (int from_tty)
536 if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution)
538 /* Bail out before killing the program if we will not be able to
540 target_require_runnable ();
543 && !query (_("The program being debugged has been started already.\n\
544 Start it from the beginning? ")))
545 error (_("Program not restarted."));
550 /* See inferior.h. */
553 prepare_execution_command (struct target_ops *target, int background)
555 /* If we get a request for running in the bg but the target
556 doesn't support it, error out. */
557 if (background && !target->to_can_async_p (target))
558 error (_("Asynchronous execution not supported on this target."));
562 /* If we get a request for running in the fg, then we need to
563 simulate synchronous (fg) execution. Note no cleanup is
564 necessary for this. stdin is re-enabled whenever an error
565 reaches the top level. */
566 all_uis_on_sync_execution_starting ();
570 /* Determine how the new inferior will behave. */
574 /* Run program without any explicit stop during startup. */
577 /* Stop at the beginning of the program's main function. */
580 /* Stop at the first instruction of the program. */
581 RUN_STOP_AT_FIRST_INSN
584 /* Implement the "run" command. Force a stop during program start if
585 requested by RUN_HOW. */
588 run_command_1 (char *args, int from_tty, enum run_how run_how)
590 const char *exec_file;
591 struct cleanup *old_chain;
593 struct ui_out *uiout = current_uiout;
594 struct target_ops *run_target;
600 kill_if_already_running (from_tty);
602 init_wait_for_inferior ();
603 clear_breakpoint_hit_counts ();
605 /* Clean up any leftovers from other runs. Some other things from
606 this function should probably be moved into target_pre_inferior. */
607 target_pre_inferior (from_tty);
609 /* The comment here used to read, "The exec file is re-read every
610 time we do a generic_mourn_inferior, so we just have to worry
611 about the symbol file." The `generic_mourn_inferior' function
612 gets called whenever the program exits. However, suppose the
613 program exits, and *then* the executable file changes? We need
614 to check again here. Since reopen_exec_file doesn't do anything
615 if the timestamp hasn't changed, I don't see the harm. */
619 gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (args, &async_exec);
620 args = stripped.get ();
622 /* Do validation and preparation before possibly changing anything
625 run_target = find_run_target ();
627 prepare_execution_command (run_target, async_exec);
629 if (non_stop && !run_target->to_supports_non_stop (run_target))
630 error (_("The target does not support running in non-stop mode."));
632 /* Done. Can now set breakpoints, change inferior args, etc. */
634 /* Insert temporary breakpoint in main function if requested. */
635 if (run_how == RUN_STOP_AT_MAIN)
636 tbreak_command (main_name (), 0);
638 exec_file = get_exec_file (0);
640 /* We keep symbols from add-symbol-file, on the grounds that the
641 user might want to add some symbols before running the program
642 (right?). But sometimes (dynamic loading where the user manually
643 introduces the new symbols with add-symbol-file), the code which
644 the symbols describe does not persist between runs. Currently
645 the user has to manually nuke all symbols between runs if they
646 want them to go away (PR 2207). This is probably reasonable. */
648 /* If there were other args, beside '&', process them. */
650 set_inferior_args (args);
654 uiout->field_string (NULL, "Starting program");
657 uiout->field_string ("execfile", exec_file);
659 /* We call get_inferior_args() because we might need to compute
661 uiout->field_string ("infargs", get_inferior_args ());
666 /* We call get_inferior_args() because we might need to compute
668 run_target->to_create_inferior (run_target, exec_file,
669 std::string (get_inferior_args ()),
670 current_inferior ()->environment.envp (),
672 /* to_create_inferior should push the target, so after this point we
673 shouldn't refer to run_target again. */
676 /* We're starting off a new process. When we get out of here, in
677 non-stop mode, finish the state of all threads of that process,
678 but leave other threads alone, as they may be stopped in internal
679 events --- the frontend shouldn't see them as stopped. In
680 all-stop, always finish the state of all threads, as we may be
681 resuming more than just the new process. */
683 ptid = pid_to_ptid (ptid_get_pid (inferior_ptid));
685 ptid = minus_one_ptid;
686 old_chain = make_cleanup (finish_thread_state_cleanup, &ptid);
688 /* Pass zero for FROM_TTY, because at this point the "run" command
689 has done its thing; now we are setting up the running program. */
690 post_create_inferior (¤t_target, 0);
692 /* Queue a pending event so that the program stops immediately. */
693 if (run_how == RUN_STOP_AT_FIRST_INSN)
695 thread_info *thr = inferior_thread ();
696 thr->suspend.waitstatus_pending_p = 1;
697 thr->suspend.waitstatus.kind = TARGET_WAITKIND_STOPPED;
698 thr->suspend.waitstatus.value.sig = GDB_SIGNAL_0;
701 /* Start the target running. Do not use -1 continuation as it would skip
702 breakpoint right at the entry point. */
703 proceed (regcache_read_pc (get_current_regcache ()), GDB_SIGNAL_0);
705 /* Since there was no error, there's no need to finish the thread
707 discard_cleanups (old_chain);
711 run_command (char *args, int from_tty)
713 run_command_1 (args, from_tty, RUN_NORMAL);
716 /* Start the execution of the program up until the beginning of the main
720 start_command (char *args, int from_tty)
722 /* Some languages such as Ada need to search inside the program
723 minimal symbols for the location where to put the temporary
724 breakpoint before starting. */
725 if (!have_minimal_symbols ())
726 error (_("No symbol table loaded. Use the \"file\" command."));
728 /* Run the program until reaching the main procedure... */
729 run_command_1 (args, from_tty, RUN_STOP_AT_MAIN);
732 /* Start the execution of the program stopping at the first
736 starti_command (char *args, int from_tty)
738 run_command_1 (args, from_tty, RUN_STOP_AT_FIRST_INSN);
742 proceed_thread_callback (struct thread_info *thread, void *arg)
744 /* We go through all threads individually instead of compressing
745 into a single target `resume_all' request, because some threads
746 may be stopped in internal breakpoints/events, or stopped waiting
747 for its turn in the displaced stepping queue (that is, they are
748 running && !executing). The target side has no idea about why
749 the thread is stopped, so a `resume_all' command would resume too
750 much. If/when GDB gains a way to tell the target `hold this
751 thread stopped until I say otherwise', then we can optimize
753 if (!is_stopped (thread->ptid))
756 switch_to_thread (thread->ptid);
757 clear_proceed_status (0);
758 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
763 ensure_valid_thread (void)
765 if (ptid_equal (inferior_ptid, null_ptid)
766 || is_exited (inferior_ptid))
767 error (_("Cannot execute this command without a live selected thread."));
770 /* If the user is looking at trace frames, any resumption of execution
771 is likely to mix up recorded and live target data. So simply
772 disallow those commands. */
775 ensure_not_tfind_mode (void)
777 if (get_traceframe_number () >= 0)
778 error (_("Cannot execute this command while looking at trace frames."));
781 /* Throw an error indicating the current thread is running. */
784 error_is_running (void)
786 error (_("Cannot execute this command while "
787 "the selected thread is running."));
790 /* Calls error_is_running if the current thread is running. */
793 ensure_not_running (void)
795 if (is_running (inferior_ptid))
800 continue_1 (int all_threads)
803 ensure_not_tfind_mode ();
805 if (non_stop && all_threads)
807 /* Don't error out if the current thread is running, because
808 there may be other stopped threads. */
810 /* Backup current thread and selected frame and restore on scope
812 scoped_restore_current_thread restore_thread;
814 iterate_over_threads (proceed_thread_callback, NULL);
816 if (current_ui->prompt_state == PROMPT_BLOCKED)
818 /* If all threads in the target were already running,
819 proceed_thread_callback ends up never calling proceed,
820 and so nothing calls this to put the inferior's terminal
821 settings in effect and remove stdin from the event loop,
822 which we must when running a foreground command. E.g.:
826 <all threads are running now>
829 <no thread was resumed, but the inferior now owns the terminal>
831 target_terminal::inferior ();
836 ensure_valid_thread ();
837 ensure_not_running ();
838 clear_proceed_status (0);
839 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
843 /* continue [-a] [proceed-count] [&] */
846 continue_command (char *args, int from_tty)
853 /* Find out whether we must run in the background. */
854 gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (args, &async_exec);
855 args = stripped.get ();
859 if (startswith (args, "-a"))
862 args += sizeof ("-a") - 1;
868 if (!non_stop && all_threads)
869 error (_("`-a' is meaningless in all-stop mode."));
871 if (args != NULL && all_threads)
872 error (_("Can't resume all threads and specify "
873 "proceed count simultaneously."));
875 /* If we have an argument left, set proceed count of breakpoint we
882 struct thread_info *tp;
885 tp = find_thread_ptid (inferior_ptid);
889 struct target_waitstatus ws;
891 get_last_target_status (&last_ptid, &ws);
892 tp = find_thread_ptid (last_ptid);
895 bs = tp->control.stop_bpstat;
897 while ((stat = bpstat_num (&bs, &num)) != 0)
900 set_ignore_count (num,
901 parse_and_eval_long (args) - 1,
903 /* set_ignore_count prints a message ending with a period.
904 So print two spaces before "Continuing.". */
906 printf_filtered (" ");
910 if (!stopped && from_tty)
913 ("Not stopped at any breakpoint; argument ignored.\n");
918 ensure_not_tfind_mode ();
920 if (!non_stop || !all_threads)
922 ensure_valid_thread ();
923 ensure_not_running ();
926 prepare_execution_command (¤t_target, async_exec);
929 printf_filtered (_("Continuing.\n"));
931 continue_1 (all_threads);
934 /* Record the starting point of a "step" or "next" command. */
937 set_step_frame (void)
939 frame_info *frame = get_current_frame ();
941 symtab_and_line sal = find_frame_sal (frame);
942 set_step_info (frame, sal);
944 CORE_ADDR pc = get_frame_pc (frame);
945 thread_info *tp = inferior_thread ();
946 tp->control.step_start_function = find_pc_function (pc);
949 /* Step until outside of current statement. */
952 step_command (char *count_string, int from_tty)
954 step_1 (0, 0, count_string);
957 /* Likewise, but skip over subroutine calls as if single instructions. */
960 next_command (char *count_string, int from_tty)
962 step_1 (1, 0, count_string);
965 /* Likewise, but step only one instruction. */
968 stepi_command (char *count_string, int from_tty)
970 step_1 (0, 1, count_string);
974 nexti_command (char *count_string, int from_tty)
976 step_1 (1, 1, count_string);
980 delete_longjmp_breakpoint_cleanup (void *arg)
982 int thread = * (int *) arg;
983 delete_longjmp_breakpoint (thread);
986 /* Data for the FSM that manages the step/next/stepi/nexti
989 struct step_command_fsm
991 /* The base class. */
992 struct thread_fsm thread_fsm;
994 /* How many steps left in a "step N"-like command. */
997 /* If true, this is a next/nexti, otherwise a step/stepi. */
998 int skip_subroutines;
1000 /* If true, this is a stepi/nexti, otherwise a step/step. */
1004 static void step_command_fsm_clean_up (struct thread_fsm *self,
1005 struct thread_info *thread);
1006 static int step_command_fsm_should_stop (struct thread_fsm *self,
1007 struct thread_info *thread);
1008 static enum async_reply_reason
1009 step_command_fsm_async_reply_reason (struct thread_fsm *self);
1011 /* step_command_fsm's vtable. */
1013 static struct thread_fsm_ops step_command_fsm_ops =
1016 step_command_fsm_clean_up,
1017 step_command_fsm_should_stop,
1018 NULL, /* return_value */
1019 step_command_fsm_async_reply_reason,
1022 /* Allocate a new step_command_fsm. */
1024 static struct step_command_fsm *
1025 new_step_command_fsm (struct interp *cmd_interp)
1027 struct step_command_fsm *sm;
1029 sm = XCNEW (struct step_command_fsm);
1030 thread_fsm_ctor (&sm->thread_fsm, &step_command_fsm_ops, cmd_interp);
1035 /* Prepare for a step/next/etc. command. Any target resource
1036 allocated here is undone in the FSM's clean_up method. */
1039 step_command_fsm_prepare (struct step_command_fsm *sm,
1040 int skip_subroutines, int single_inst,
1041 int count, struct thread_info *thread)
1043 sm->skip_subroutines = skip_subroutines;
1044 sm->single_inst = single_inst;
1047 /* Leave the si command alone. */
1048 if (!sm->single_inst || sm->skip_subroutines)
1049 set_longjmp_breakpoint (thread, get_frame_id (get_current_frame ()));
1051 thread->control.stepping_command = 1;
1054 static int prepare_one_step (struct step_command_fsm *sm);
1057 step_1 (int skip_subroutines, int single_inst, char *count_string)
1061 struct thread_info *thr;
1062 struct step_command_fsm *step_sm;
1065 ensure_not_tfind_mode ();
1066 ensure_valid_thread ();
1067 ensure_not_running ();
1069 gdb::unique_xmalloc_ptr<char> stripped
1070 = strip_bg_char (count_string, &async_exec);
1071 count_string = stripped.get ();
1073 prepare_execution_command (¤t_target, async_exec);
1075 count = count_string ? parse_and_eval_long (count_string) : 1;
1077 clear_proceed_status (1);
1079 /* Setup the execution command state machine to handle all the COUNT
1081 thr = inferior_thread ();
1082 step_sm = new_step_command_fsm (command_interp ());
1083 thr->thread_fsm = &step_sm->thread_fsm;
1085 step_command_fsm_prepare (step_sm, skip_subroutines,
1086 single_inst, count, thr);
1088 /* Do only one step for now, before returning control to the event
1089 loop. Let the continuation figure out how many other steps we
1090 need to do, and handle them one at the time, through
1092 if (!prepare_one_step (step_sm))
1093 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
1098 /* Stepped into an inline frame. Pretend that we've
1100 thread_fsm_clean_up (thr->thread_fsm, thr);
1101 proceeded = normal_stop ();
1103 inferior_event_handler (INF_EXEC_COMPLETE, NULL);
1104 all_uis_check_sync_execution_done ();
1108 /* Implementation of the 'should_stop' FSM method for stepping
1109 commands. Called after we are done with one step operation, to
1110 check whether we need to step again, before we print the prompt and
1111 return control to the user. If count is > 1, returns false, as we
1112 will need to keep going. */
1115 step_command_fsm_should_stop (struct thread_fsm *self, struct thread_info *tp)
1117 struct step_command_fsm *sm = (struct step_command_fsm *) self;
1119 if (tp->control.stop_step)
1121 /* There are more steps to make, and we did stop due to
1122 ending a stepping range. Do another step. */
1123 if (--sm->count > 0)
1124 return prepare_one_step (sm);
1126 thread_fsm_set_finished (self);
1132 /* Implementation of the 'clean_up' FSM method for stepping commands. */
1135 step_command_fsm_clean_up (struct thread_fsm *self, struct thread_info *thread)
1137 struct step_command_fsm *sm = (struct step_command_fsm *) self;
1139 if (!sm->single_inst || sm->skip_subroutines)
1140 delete_longjmp_breakpoint (thread->global_num);
1143 /* Implementation of the 'async_reply_reason' FSM method for stepping
1146 static enum async_reply_reason
1147 step_command_fsm_async_reply_reason (struct thread_fsm *self)
1149 return EXEC_ASYNC_END_STEPPING_RANGE;
1152 /* Prepare for one step in "step N". The actual target resumption is
1153 done by the caller. Return true if we're done and should thus
1154 report a stop to the user. Returns false if the target needs to be
1158 prepare_one_step (struct step_command_fsm *sm)
1162 struct frame_info *frame = get_current_frame ();
1164 /* Don't assume THREAD is a valid thread id. It is set to -1 if
1165 the longjmp breakpoint was not required. Use the
1166 INFERIOR_PTID thread instead, which is the same thread when
1168 struct thread_info *tp = inferior_thread ();
1172 if (!sm->single_inst)
1176 /* Step at an inlined function behaves like "down". */
1177 if (!sm->skip_subroutines
1178 && inline_skipped_frames (inferior_ptid))
1182 /* Pretend that we've ran. */
1183 resume_ptid = user_visible_resume_ptid (1);
1184 set_running (resume_ptid, 1);
1186 step_into_inline_frame (inferior_ptid);
1188 return prepare_one_step (sm);
1191 pc = get_frame_pc (frame);
1192 find_pc_line_pc_range (pc,
1193 &tp->control.step_range_start,
1194 &tp->control.step_range_end);
1196 tp->control.may_range_step = 1;
1198 /* If we have no line info, switch to stepi mode. */
1199 if (tp->control.step_range_end == 0 && step_stop_if_no_debug)
1201 tp->control.step_range_start = tp->control.step_range_end = 1;
1202 tp->control.may_range_step = 0;
1204 else if (tp->control.step_range_end == 0)
1208 if (find_pc_partial_function (pc, &name,
1209 &tp->control.step_range_start,
1210 &tp->control.step_range_end) == 0)
1211 error (_("Cannot find bounds of current function"));
1213 target_terminal::ours_for_output ();
1214 printf_filtered (_("Single stepping until exit from function %s,"
1215 "\nwhich has no line number information.\n"),
1221 /* Say we are stepping, but stop after one insn whatever it does. */
1222 tp->control.step_range_start = tp->control.step_range_end = 1;
1223 if (!sm->skip_subroutines)
1225 Don't step over function calls, not even to functions lacking
1227 tp->control.step_over_calls = STEP_OVER_NONE;
1230 if (sm->skip_subroutines)
1231 tp->control.step_over_calls = STEP_OVER_ALL;
1237 thread_fsm_set_finished (&sm->thread_fsm);
1242 /* Continue program at specified address. */
1245 jump_command (char *arg, int from_tty)
1247 struct gdbarch *gdbarch = get_current_arch ();
1254 ensure_not_tfind_mode ();
1255 ensure_valid_thread ();
1256 ensure_not_running ();
1258 /* Find out whether we must run in the background. */
1259 gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (arg, &async_exec);
1260 arg = stripped.get ();
1262 prepare_execution_command (¤t_target, async_exec);
1265 error_no_arg (_("starting address"));
1267 std::vector<symtab_and_line> sals
1268 = decode_line_with_last_displayed (arg, DECODE_LINE_FUNFIRSTLINE);
1269 if (sals.size () != 1)
1270 error (_("Unreasonable jump request"));
1272 symtab_and_line &sal = sals[0];
1274 if (sal.symtab == 0 && sal.pc == 0)
1275 error (_("No source file has been specified."));
1277 resolve_sal_pc (&sal); /* May error out. */
1279 /* See if we are trying to jump to another function. */
1280 fn = get_frame_function (get_current_frame ());
1281 sfn = find_pc_function (sal.pc);
1282 if (fn != NULL && sfn != fn)
1284 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal.line,
1285 SYMBOL_PRINT_NAME (fn)))
1287 error (_("Not confirmed."));
1294 struct obj_section *section;
1296 fixup_symbol_section (sfn, 0);
1297 section = SYMBOL_OBJ_SECTION (symbol_objfile (sfn), sfn);
1298 if (section_is_overlay (section)
1299 && !section_is_mapped (section))
1301 if (!query (_("WARNING!!! Destination is in "
1302 "unmapped overlay! Jump anyway? ")))
1304 error (_("Not confirmed."));
1314 printf_filtered (_("Continuing at "));
1315 fputs_filtered (paddress (gdbarch, addr), gdb_stdout);
1316 printf_filtered (".\n");
1319 clear_proceed_status (0);
1320 proceed (addr, GDB_SIGNAL_0);
1323 /* Continue program giving it specified signal. */
1326 signal_command (char *signum_exp, int from_tty)
1328 enum gdb_signal oursig;
1331 dont_repeat (); /* Too dangerous. */
1333 ensure_not_tfind_mode ();
1334 ensure_valid_thread ();
1335 ensure_not_running ();
1337 /* Find out whether we must run in the background. */
1338 gdb::unique_xmalloc_ptr<char> stripped
1339 = strip_bg_char (signum_exp, &async_exec);
1340 signum_exp = stripped.get ();
1342 prepare_execution_command (¤t_target, async_exec);
1345 error_no_arg (_("signal number"));
1347 /* It would be even slicker to make signal names be valid expressions,
1348 (the type could be "enum $signal" or some such), then the user could
1349 assign them to convenience variables. */
1350 oursig = gdb_signal_from_name (signum_exp);
1352 if (oursig == GDB_SIGNAL_UNKNOWN)
1354 /* No, try numeric. */
1355 int num = parse_and_eval_long (signum_exp);
1358 oursig = GDB_SIGNAL_0;
1360 oursig = gdb_signal_from_command (num);
1363 /* Look for threads other than the current that this command ends up
1364 resuming too (due to schedlock off), and warn if they'll get a
1365 signal delivered. "signal 0" is used to suppress a previous
1366 signal, but if the current thread is no longer the one that got
1367 the signal, then the user is potentially suppressing the signal
1368 of the wrong thread. */
1371 struct thread_info *tp;
1373 int must_confirm = 0;
1375 /* This indicates what will be resumed. Either a single thread,
1376 a whole process, or all threads of all processes. */
1377 resume_ptid = user_visible_resume_ptid (0);
1379 ALL_NON_EXITED_THREADS (tp)
1381 if (ptid_equal (tp->ptid, inferior_ptid))
1383 if (!ptid_match (tp->ptid, resume_ptid))
1386 if (tp->suspend.stop_signal != GDB_SIGNAL_0
1387 && signal_pass_state (tp->suspend.stop_signal))
1390 printf_unfiltered (_("Note:\n"));
1391 printf_unfiltered (_(" Thread %s previously stopped with signal %s, %s.\n"),
1392 print_thread_id (tp),
1393 gdb_signal_to_name (tp->suspend.stop_signal),
1394 gdb_signal_to_string (tp->suspend.stop_signal));
1400 && !query (_("Continuing thread %s (the current thread) with specified signal will\n"
1401 "still deliver the signals noted above to their respective threads.\n"
1402 "Continue anyway? "),
1403 print_thread_id (inferior_thread ())))
1404 error (_("Not confirmed."));
1409 if (oursig == GDB_SIGNAL_0)
1410 printf_filtered (_("Continuing with no signal.\n"));
1412 printf_filtered (_("Continuing with signal %s.\n"),
1413 gdb_signal_to_name (oursig));
1416 clear_proceed_status (0);
1417 proceed ((CORE_ADDR) -1, oursig);
1420 /* Queue a signal to be delivered to the current thread. */
1423 queue_signal_command (char *signum_exp, int from_tty)
1425 enum gdb_signal oursig;
1426 struct thread_info *tp;
1429 ensure_not_tfind_mode ();
1430 ensure_valid_thread ();
1431 ensure_not_running ();
1433 if (signum_exp == NULL)
1434 error_no_arg (_("signal number"));
1436 /* It would be even slicker to make signal names be valid expressions,
1437 (the type could be "enum $signal" or some such), then the user could
1438 assign them to convenience variables. */
1439 oursig = gdb_signal_from_name (signum_exp);
1441 if (oursig == GDB_SIGNAL_UNKNOWN)
1443 /* No, try numeric. */
1444 int num = parse_and_eval_long (signum_exp);
1447 oursig = GDB_SIGNAL_0;
1449 oursig = gdb_signal_from_command (num);
1452 if (oursig != GDB_SIGNAL_0
1453 && !signal_pass_state (oursig))
1454 error (_("Signal handling set to not pass this signal to the program."));
1456 tp = inferior_thread ();
1457 tp->suspend.stop_signal = oursig;
1460 /* Data for the FSM that manages the until (with no argument)
1463 struct until_next_fsm
1465 /* The base class. */
1466 struct thread_fsm thread_fsm;
1468 /* The thread that as current when the command was executed. */
1472 static int until_next_fsm_should_stop (struct thread_fsm *self,
1473 struct thread_info *thread);
1474 static void until_next_fsm_clean_up (struct thread_fsm *self,
1475 struct thread_info *thread);
1476 static enum async_reply_reason
1477 until_next_fsm_async_reply_reason (struct thread_fsm *self);
1479 /* until_next_fsm's vtable. */
1481 static struct thread_fsm_ops until_next_fsm_ops =
1484 until_next_fsm_clean_up,
1485 until_next_fsm_should_stop,
1486 NULL, /* return_value */
1487 until_next_fsm_async_reply_reason,
1490 /* Allocate a new until_next_fsm. */
1492 static struct until_next_fsm *
1493 new_until_next_fsm (struct interp *cmd_interp, int thread)
1495 struct until_next_fsm *sm;
1497 sm = XCNEW (struct until_next_fsm);
1498 thread_fsm_ctor (&sm->thread_fsm, &until_next_fsm_ops, cmd_interp);
1500 sm->thread = thread;
1505 /* Implementation of the 'should_stop' FSM method for the until (with
1509 until_next_fsm_should_stop (struct thread_fsm *self,
1510 struct thread_info *tp)
1512 if (tp->control.stop_step)
1513 thread_fsm_set_finished (self);
1518 /* Implementation of the 'clean_up' FSM method for the until (with no
1522 until_next_fsm_clean_up (struct thread_fsm *self, struct thread_info *thread)
1524 struct until_next_fsm *sm = (struct until_next_fsm *) self;
1526 delete_longjmp_breakpoint (thread->global_num);
1529 /* Implementation of the 'async_reply_reason' FSM method for the until
1530 (with no arg) command. */
1532 static enum async_reply_reason
1533 until_next_fsm_async_reply_reason (struct thread_fsm *self)
1535 return EXEC_ASYNC_END_STEPPING_RANGE;
1538 /* Proceed until we reach a different source line with pc greater than
1539 our current one or exit the function. We skip calls in both cases.
1541 Note that eventually this command should probably be changed so
1542 that only source lines are printed out when we hit the breakpoint
1543 we set. This may involve changes to wait_for_inferior and the
1544 proceed status code. */
1547 until_next_command (int from_tty)
1549 struct frame_info *frame;
1551 struct symbol *func;
1552 struct symtab_and_line sal;
1553 struct thread_info *tp = inferior_thread ();
1554 int thread = tp->global_num;
1555 struct cleanup *old_chain;
1556 struct until_next_fsm *sm;
1558 clear_proceed_status (0);
1561 frame = get_current_frame ();
1563 /* Step until either exited from this function or greater
1564 than the current line (if in symbolic section) or pc (if
1567 pc = get_frame_pc (frame);
1568 func = find_pc_function (pc);
1572 struct bound_minimal_symbol msymbol = lookup_minimal_symbol_by_pc (pc);
1574 if (msymbol.minsym == NULL)
1575 error (_("Execution is not within a known function."));
1577 tp->control.step_range_start = BMSYMBOL_VALUE_ADDRESS (msymbol);
1578 /* The upper-bound of step_range is exclusive. In order to make PC
1579 within the range, set the step_range_end with PC + 1. */
1580 tp->control.step_range_end = pc + 1;
1584 sal = find_pc_line (pc, 0);
1586 tp->control.step_range_start = BLOCK_START (SYMBOL_BLOCK_VALUE (func));
1587 tp->control.step_range_end = sal.end;
1589 tp->control.may_range_step = 1;
1591 tp->control.step_over_calls = STEP_OVER_ALL;
1593 set_longjmp_breakpoint (tp, get_frame_id (frame));
1594 old_chain = make_cleanup (delete_longjmp_breakpoint_cleanup, &thread);
1596 sm = new_until_next_fsm (command_interp (), tp->global_num);
1597 tp->thread_fsm = &sm->thread_fsm;
1598 discard_cleanups (old_chain);
1600 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
1604 until_command (char *arg, int from_tty)
1609 ensure_not_tfind_mode ();
1610 ensure_valid_thread ();
1611 ensure_not_running ();
1613 /* Find out whether we must run in the background. */
1614 gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (arg, &async_exec);
1615 arg = stripped.get ();
1617 prepare_execution_command (¤t_target, async_exec);
1620 until_break_command (arg, from_tty, 0);
1622 until_next_command (from_tty);
1626 advance_command (char *arg, int from_tty)
1631 ensure_not_tfind_mode ();
1632 ensure_valid_thread ();
1633 ensure_not_running ();
1636 error_no_arg (_("a location"));
1638 /* Find out whether we must run in the background. */
1639 gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (arg, &async_exec);
1640 arg = stripped.get ();
1642 prepare_execution_command (¤t_target, async_exec);
1644 until_break_command (arg, from_tty, 1);
1647 /* Return the value of the result of a function at the end of a 'finish'
1648 command/BP. DTOR_DATA (if not NULL) can represent inferior registers
1649 right after an inferior call has finished. */
1652 get_return_value (struct value *function, struct type *value_type)
1654 regcache stop_regs (regcache::readonly, *get_current_regcache ());
1655 struct gdbarch *gdbarch = stop_regs.arch ();
1656 struct value *value;
1658 value_type = check_typedef (value_type);
1659 gdb_assert (TYPE_CODE (value_type) != TYPE_CODE_VOID);
1661 /* FIXME: 2003-09-27: When returning from a nested inferior function
1662 call, it's possible (with no help from the architecture vector)
1663 to locate and return/print a "struct return" value. This is just
1664 a more complicated case of what is already being done in the
1665 inferior function call code. In fact, when inferior function
1666 calls are made async, this will likely be made the norm. */
1668 switch (gdbarch_return_value (gdbarch, function, value_type,
1671 case RETURN_VALUE_REGISTER_CONVENTION:
1672 case RETURN_VALUE_ABI_RETURNS_ADDRESS:
1673 case RETURN_VALUE_ABI_PRESERVES_ADDRESS:
1674 value = allocate_value (value_type);
1675 gdbarch_return_value (gdbarch, function, value_type, &stop_regs,
1676 value_contents_raw (value), NULL);
1678 case RETURN_VALUE_STRUCT_CONVENTION:
1682 internal_error (__FILE__, __LINE__, _("bad switch"));
1688 /* The captured function return value/type and its position in the
1691 struct return_value_info
1693 /* The captured return value. May be NULL if we weren't able to
1694 retrieve it. See get_return_value. */
1695 struct value *value;
1697 /* The return type. In some cases, we'll not be able extract the
1698 return value, but we always know the type. */
1701 /* If we captured a value, this is the value history index. */
1702 int value_history_index;
1705 /* Helper for print_return_value. */
1708 print_return_value_1 (struct ui_out *uiout, struct return_value_info *rv)
1710 if (rv->value != NULL)
1712 struct value_print_options opts;
1715 uiout->text ("Value returned is ");
1716 uiout->field_fmt ("gdb-result-var", "$%d",
1717 rv->value_history_index);
1718 uiout->text (" = ");
1719 get_no_prettyformat_print_options (&opts);
1723 value_print (rv->value, &stb, &opts);
1724 uiout->field_stream ("return-value", stb);
1729 std::string type_name = type_to_string (rv->type);
1730 uiout->text ("Value returned has type: ");
1731 uiout->field_string ("return-type", type_name.c_str ());
1733 uiout->text (" Cannot determine contents\n");
1737 /* Print the result of a function at the end of a 'finish' command.
1738 RV points at an object representing the captured return value/type
1739 and its position in the value history. */
1742 print_return_value (struct ui_out *uiout, struct return_value_info *rv)
1744 if (rv->type == NULL || TYPE_CODE (rv->type) == TYPE_CODE_VOID)
1749 /* print_return_value_1 can throw an exception in some
1750 circumstances. We need to catch this so that we still
1751 delete the breakpoint. */
1752 print_return_value_1 (uiout, rv);
1754 CATCH (ex, RETURN_MASK_ALL)
1756 exception_print (gdb_stdout, ex);
1761 /* Data for the FSM that manages the finish command. */
1763 struct finish_command_fsm
1765 /* The base class. */
1766 struct thread_fsm thread_fsm;
1768 /* The momentary breakpoint set at the function's return address in
1770 struct breakpoint *breakpoint;
1772 /* The function that we're stepping out of. */
1773 struct symbol *function;
1775 /* If the FSM finishes successfully, this stores the function's
1777 struct return_value_info return_value;
1780 static int finish_command_fsm_should_stop (struct thread_fsm *self,
1781 struct thread_info *thread);
1782 static void finish_command_fsm_clean_up (struct thread_fsm *self,
1783 struct thread_info *thread);
1784 static struct return_value_info *
1785 finish_command_fsm_return_value (struct thread_fsm *self);
1786 static enum async_reply_reason
1787 finish_command_fsm_async_reply_reason (struct thread_fsm *self);
1789 /* finish_command_fsm's vtable. */
1791 static struct thread_fsm_ops finish_command_fsm_ops =
1794 finish_command_fsm_clean_up,
1795 finish_command_fsm_should_stop,
1796 finish_command_fsm_return_value,
1797 finish_command_fsm_async_reply_reason,
1798 NULL, /* should_notify_stop */
1801 /* Allocate a new finish_command_fsm. */
1803 static struct finish_command_fsm *
1804 new_finish_command_fsm (struct interp *cmd_interp)
1806 struct finish_command_fsm *sm;
1808 sm = XCNEW (struct finish_command_fsm);
1809 thread_fsm_ctor (&sm->thread_fsm, &finish_command_fsm_ops, cmd_interp);
1814 /* Implementation of the 'should_stop' FSM method for the finish
1815 commands. Detects whether the thread stepped out of the function
1816 successfully, and if so, captures the function's return value and
1817 marks the FSM finished. */
1820 finish_command_fsm_should_stop (struct thread_fsm *self,
1821 struct thread_info *tp)
1823 struct finish_command_fsm *f = (struct finish_command_fsm *) self;
1824 struct return_value_info *rv = &f->return_value;
1826 if (f->function != NULL
1827 && bpstat_find_breakpoint (tp->control.stop_bpstat,
1828 f->breakpoint) != NULL)
1831 thread_fsm_set_finished (self);
1833 rv->type = TYPE_TARGET_TYPE (SYMBOL_TYPE (f->function));
1834 if (rv->type == NULL)
1835 internal_error (__FILE__, __LINE__,
1836 _("finish_command: function has no target type"));
1838 if (TYPE_CODE (rv->type) != TYPE_CODE_VOID)
1842 func = read_var_value (f->function, NULL, get_current_frame ());
1843 rv->value = get_return_value (func, rv->type);
1844 if (rv->value != NULL)
1845 rv->value_history_index = record_latest_value (rv->value);
1848 else if (tp->control.stop_step)
1850 /* Finishing from an inline frame, or reverse finishing. In
1851 either case, there's no way to retrieve the return value. */
1852 thread_fsm_set_finished (self);
1858 /* Implementation of the 'clean_up' FSM method for the finish
1862 finish_command_fsm_clean_up (struct thread_fsm *self,
1863 struct thread_info *thread)
1865 struct finish_command_fsm *f = (struct finish_command_fsm *) self;
1867 if (f->breakpoint != NULL)
1869 delete_breakpoint (f->breakpoint);
1870 f->breakpoint = NULL;
1872 delete_longjmp_breakpoint (thread->global_num);
1875 /* Implementation of the 'return_value' FSM method for the finish
1878 static struct return_value_info *
1879 finish_command_fsm_return_value (struct thread_fsm *self)
1881 struct finish_command_fsm *f = (struct finish_command_fsm *) self;
1883 return &f->return_value;
1886 /* Implementation of the 'async_reply_reason' FSM method for the
1889 static enum async_reply_reason
1890 finish_command_fsm_async_reply_reason (struct thread_fsm *self)
1892 if (execution_direction == EXEC_REVERSE)
1893 return EXEC_ASYNC_END_STEPPING_RANGE;
1895 return EXEC_ASYNC_FUNCTION_FINISHED;
1898 /* finish_backward -- helper function for finish_command. */
1901 finish_backward (struct finish_command_fsm *sm)
1903 struct symtab_and_line sal;
1904 struct thread_info *tp = inferior_thread ();
1906 CORE_ADDR func_addr;
1908 pc = get_frame_pc (get_current_frame ());
1910 if (find_pc_partial_function (pc, NULL, &func_addr, NULL) == 0)
1911 error (_("Cannot find bounds of current function"));
1913 sal = find_pc_line (func_addr, 0);
1915 tp->control.proceed_to_finish = 1;
1916 /* Special case: if we're sitting at the function entry point,
1917 then all we need to do is take a reverse singlestep. We
1918 don't need to set a breakpoint, and indeed it would do us
1921 Note that this can only happen at frame #0, since there's
1922 no way that a function up the stack can have a return address
1923 that's equal to its entry point. */
1927 struct frame_info *frame = get_selected_frame (NULL);
1928 struct gdbarch *gdbarch = get_frame_arch (frame);
1930 /* Set a step-resume at the function's entry point. Once that's
1931 hit, we'll do one more step backwards. */
1932 symtab_and_line sr_sal;
1934 sr_sal.pspace = get_frame_program_space (frame);
1935 insert_step_resume_breakpoint_at_sal (gdbarch,
1936 sr_sal, null_frame_id);
1938 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
1942 /* We're almost there -- we just need to back up by one more
1944 tp->control.step_range_start = tp->control.step_range_end = 1;
1945 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
1949 /* finish_forward -- helper function for finish_command. FRAME is the
1950 frame that called the function we're about to step out of. */
1953 finish_forward (struct finish_command_fsm *sm, struct frame_info *frame)
1955 struct frame_id frame_id = get_frame_id (frame);
1956 struct gdbarch *gdbarch = get_frame_arch (frame);
1957 struct symtab_and_line sal;
1958 struct thread_info *tp = inferior_thread ();
1960 sal = find_pc_line (get_frame_pc (frame), 0);
1961 sal.pc = get_frame_pc (frame);
1963 sm->breakpoint = set_momentary_breakpoint (gdbarch, sal,
1964 get_stack_frame_id (frame),
1965 bp_finish).release ();
1967 /* set_momentary_breakpoint invalidates FRAME. */
1970 set_longjmp_breakpoint (tp, frame_id);
1972 /* We want to print return value, please... */
1973 tp->control.proceed_to_finish = 1;
1975 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
1978 /* Skip frames for "finish". */
1980 static struct frame_info *
1981 skip_finish_frames (struct frame_info *frame)
1983 struct frame_info *start;
1989 frame = skip_tailcall_frames (frame);
1993 frame = skip_unwritable_frames (frame);
1997 while (start != frame);
2002 /* "finish": Set a temporary breakpoint at the place the selected
2003 frame will return to, then continue. */
2006 finish_command (char *arg, int from_tty)
2008 struct frame_info *frame;
2010 struct finish_command_fsm *sm;
2011 struct thread_info *tp;
2014 ensure_not_tfind_mode ();
2015 ensure_valid_thread ();
2016 ensure_not_running ();
2018 /* Find out whether we must run in the background. */
2019 gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (arg, &async_exec);
2020 arg = stripped.get ();
2022 prepare_execution_command (¤t_target, async_exec);
2025 error (_("The \"finish\" command does not take any arguments."));
2027 frame = get_prev_frame (get_selected_frame (_("No selected frame.")));
2029 error (_("\"finish\" not meaningful in the outermost frame."));
2031 clear_proceed_status (0);
2033 tp = inferior_thread ();
2035 sm = new_finish_command_fsm (command_interp ());
2037 tp->thread_fsm = &sm->thread_fsm;
2039 /* Finishing from an inline frame is completely different. We don't
2040 try to show the "return value" - no way to locate it. */
2041 if (get_frame_type (get_selected_frame (_("No selected frame.")))
2044 /* Claim we are stepping in the calling frame. An empty step
2045 range means that we will stop once we aren't in a function
2046 called by that frame. We don't use the magic "1" value for
2047 step_range_end, because then infrun will think this is nexti,
2048 and not step over the rest of this inlined function call. */
2049 set_step_info (frame, {});
2050 tp->control.step_range_start = get_frame_pc (frame);
2051 tp->control.step_range_end = tp->control.step_range_start;
2052 tp->control.step_over_calls = STEP_OVER_ALL;
2054 /* Print info on the selected frame, including level number but not
2058 printf_filtered (_("Run till exit from "));
2059 print_stack_frame (get_selected_frame (NULL), 1, LOCATION, 0);
2062 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
2066 /* Find the function we will return from. */
2068 sm->function = find_pc_function (get_frame_pc (get_selected_frame (NULL)));
2070 /* Print info on the selected frame, including level number but not
2074 if (execution_direction == EXEC_REVERSE)
2075 printf_filtered (_("Run back to call of "));
2078 if (sm->function != NULL && TYPE_NO_RETURN (sm->function->type)
2079 && !query (_("warning: Function %s does not return normally.\n"
2080 "Try to finish anyway? "),
2081 SYMBOL_PRINT_NAME (sm->function)))
2082 error (_("Not confirmed."));
2083 printf_filtered (_("Run till exit from "));
2086 print_stack_frame (get_selected_frame (NULL), 1, LOCATION, 0);
2089 if (execution_direction == EXEC_REVERSE)
2090 finish_backward (sm);
2093 frame = skip_finish_frames (frame);
2096 error (_("Cannot find the caller frame."));
2098 finish_forward (sm, frame);
2104 info_program_command (char *args, int from_tty)
2108 struct thread_info *tp;
2111 if (!target_has_execution)
2113 printf_filtered (_("The program being debugged is not being run.\n"));
2118 ptid = inferior_ptid;
2121 struct target_waitstatus ws;
2123 get_last_target_status (&ptid, &ws);
2126 if (ptid_equal (ptid, null_ptid) || is_exited (ptid))
2127 error (_("Invalid selected thread."));
2128 else if (is_running (ptid))
2129 error (_("Selected thread is running."));
2131 tp = find_thread_ptid (ptid);
2132 bs = tp->control.stop_bpstat;
2133 stat = bpstat_num (&bs, &num);
2135 target_files_info ();
2136 printf_filtered (_("Program stopped at %s.\n"),
2137 paddress (target_gdbarch (), stop_pc));
2138 if (tp->control.stop_step)
2139 printf_filtered (_("It stopped after being stepped.\n"));
2142 /* There may be several breakpoints in the same place, so this
2143 isn't as strange as it seems. */
2148 printf_filtered (_("It stopped at a breakpoint "
2149 "that has since been deleted.\n"));
2152 printf_filtered (_("It stopped at breakpoint %d.\n"), num);
2153 stat = bpstat_num (&bs, &num);
2156 else if (tp->suspend.stop_signal != GDB_SIGNAL_0)
2158 printf_filtered (_("It stopped with signal %s, %s.\n"),
2159 gdb_signal_to_name (tp->suspend.stop_signal),
2160 gdb_signal_to_string (tp->suspend.stop_signal));
2165 printf_filtered (_("Type \"info stack\" or \"info "
2166 "registers\" for more information.\n"));
2171 environment_info (const char *var, int from_tty)
2175 const char *val = current_inferior ()->environment.get (var);
2179 puts_filtered (var);
2180 puts_filtered (" = ");
2181 puts_filtered (val);
2182 puts_filtered ("\n");
2186 puts_filtered ("Environment variable \"");
2187 puts_filtered (var);
2188 puts_filtered ("\" not defined.\n");
2193 char **envp = current_inferior ()->environment.envp ();
2195 for (int idx = 0; envp[idx] != NULL; ++idx)
2197 puts_filtered (envp[idx]);
2198 puts_filtered ("\n");
2204 set_environment_command (const char *arg, int from_tty)
2206 const char *p, *val;
2210 error_no_arg (_("environment variable and value"));
2212 /* Find seperation between variable name and value. */
2213 p = (char *) strchr (arg, '=');
2214 val = (char *) strchr (arg, ' ');
2216 if (p != 0 && val != 0)
2218 /* We have both a space and an equals. If the space is before the
2219 equals, walk forward over the spaces til we see a nonspace
2220 (possibly the equals). */
2225 /* Now if the = is after the char following the spaces,
2226 take the char following the spaces. */
2230 else if (val != 0 && p == 0)
2234 error_no_arg (_("environment variable to set"));
2236 if (p == 0 || p[1] == 0)
2240 p = arg + strlen (arg); /* So that savestring below will work. */
2244 /* Not setting variable value to null. */
2246 while (*val == ' ' || *val == '\t')
2250 while (p != arg && (p[-1] == ' ' || p[-1] == '\t'))
2253 std::string var (arg, p - arg);
2256 printf_filtered (_("Setting environment variable "
2257 "\"%s\" to null value.\n"),
2259 current_inferior ()->environment.set (var.c_str (), "");
2262 current_inferior ()->environment.set (var.c_str (), val);
2266 unset_environment_command (const char *var, int from_tty)
2270 /* If there is no argument, delete all environment variables.
2271 Ask for confirmation if reading from the terminal. */
2272 if (!from_tty || query (_("Delete all environment variables? ")))
2273 current_inferior ()->environment.clear ();
2276 current_inferior ()->environment.unset (var);
2279 /* Handle the execution path (PATH variable). */
2281 static const char path_var_name[] = "PATH";
2284 path_info (const char *args, int from_tty)
2286 puts_filtered ("Executable and object file path: ");
2287 puts_filtered (current_inferior ()->environment.get (path_var_name));
2288 puts_filtered ("\n");
2291 /* Add zero or more directories to the front of the execution path. */
2294 path_command (char *dirname, int from_tty)
2300 env = current_inferior ()->environment.get (path_var_name);
2301 /* Can be null if path is not set. */
2304 exec_path = xstrdup (env);
2305 mod_path (dirname, &exec_path);
2306 current_inferior ()->environment.set (path_var_name, exec_path);
2309 path_info ((char *) NULL, from_tty);
2313 /* Print out the register NAME with value VAL, to FILE, in the default
2317 default_print_one_register_info (struct ui_file *file,
2321 struct type *regtype = value_type (val);
2322 int print_raw_format;
2324 fputs_filtered (name, file);
2325 print_spaces_filtered (15 - strlen (name), file);
2327 print_raw_format = (value_entirely_available (val)
2328 && !value_optimized_out (val));
2330 /* If virtual format is floating, print it that way, and in raw
2332 if (TYPE_CODE (regtype) == TYPE_CODE_FLT
2333 || TYPE_CODE (regtype) == TYPE_CODE_DECFLOAT)
2335 struct value_print_options opts;
2336 const gdb_byte *valaddr = value_contents_for_printing (val);
2337 enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (regtype));
2339 get_user_print_options (&opts);
2343 value_embedded_offset (val), 0,
2344 file, 0, val, &opts, current_language);
2346 if (print_raw_format)
2348 fprintf_filtered (file, "\t(raw ");
2349 print_hex_chars (file, valaddr, TYPE_LENGTH (regtype), byte_order,
2351 fprintf_filtered (file, ")");
2356 struct value_print_options opts;
2358 /* Print the register in hex. */
2359 get_formatted_print_options (&opts, 'x');
2362 value_embedded_offset (val), 0,
2363 file, 0, val, &opts, current_language);
2364 /* If not a vector register, print it also according to its
2366 if (print_raw_format && TYPE_VECTOR (regtype) == 0)
2368 get_user_print_options (&opts);
2370 fprintf_filtered (file, "\t");
2372 value_embedded_offset (val), 0,
2373 file, 0, val, &opts, current_language);
2377 fprintf_filtered (file, "\n");
2380 /* Print out the machine register regnum. If regnum is -1, print all
2381 registers (print_all == 1) or all non-float and non-vector
2382 registers (print_all == 0).
2384 For most machines, having all_registers_info() print the
2385 register(s) one per line is good enough. If a different format is
2386 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2387 regs), or there is an existing convention for showing all the
2388 registers, define the architecture method PRINT_REGISTERS_INFO to
2389 provide that format. */
2392 default_print_registers_info (struct gdbarch *gdbarch,
2393 struct ui_file *file,
2394 struct frame_info *frame,
2395 int regnum, int print_all)
2398 const int numregs = gdbarch_num_regs (gdbarch)
2399 + gdbarch_num_pseudo_regs (gdbarch);
2401 for (i = 0; i < numregs; i++)
2403 /* Decide between printing all regs, non-float / vector regs, or
2409 if (!gdbarch_register_reggroup_p (gdbarch, i, all_reggroup))
2414 if (!gdbarch_register_reggroup_p (gdbarch, i, general_reggroup))
2424 /* If the register name is empty, it is undefined for this
2425 processor, so don't display anything. */
2426 if (gdbarch_register_name (gdbarch, i) == NULL
2427 || *(gdbarch_register_name (gdbarch, i)) == '\0')
2430 default_print_one_register_info (file,
2431 gdbarch_register_name (gdbarch, i),
2432 value_of_register (i, frame));
2437 registers_info (char *addr_exp, int fpregs)
2439 struct frame_info *frame;
2440 struct gdbarch *gdbarch;
2442 if (!target_has_registers)
2443 error (_("The program has no registers now."));
2444 frame = get_selected_frame (NULL);
2445 gdbarch = get_frame_arch (frame);
2449 gdbarch_print_registers_info (gdbarch, gdb_stdout,
2454 while (*addr_exp != '\0')
2459 /* Skip leading white space. */
2460 addr_exp = skip_spaces (addr_exp);
2462 /* Discard any leading ``$''. Check that there is something
2463 resembling a register following it. */
2464 if (addr_exp[0] == '$')
2466 if (isspace ((*addr_exp)) || (*addr_exp) == '\0')
2467 error (_("Missing register name"));
2469 /* Find the start/end of this register name/num/group. */
2471 while ((*addr_exp) != '\0' && !isspace ((*addr_exp)))
2475 /* Figure out what we've found and display it. */
2477 /* A register name? */
2479 int regnum = user_reg_map_name_to_regnum (gdbarch, start, end - start);
2483 /* User registers lie completely outside of the range of
2484 normal registers. Catch them early so that the target
2486 if (regnum >= gdbarch_num_regs (gdbarch)
2487 + gdbarch_num_pseudo_regs (gdbarch))
2489 struct value *regval = value_of_user_reg (regnum, frame);
2490 const char *regname = user_reg_map_regnum_to_name (gdbarch,
2493 /* Print in the same fashion
2494 gdbarch_print_registers_info's default
2495 implementation prints. */
2496 default_print_one_register_info (gdb_stdout,
2501 gdbarch_print_registers_info (gdbarch, gdb_stdout,
2502 frame, regnum, fpregs);
2507 /* A register group? */
2509 struct reggroup *group;
2511 for (group = reggroup_next (gdbarch, NULL);
2513 group = reggroup_next (gdbarch, group))
2515 /* Don't bother with a length check. Should the user
2516 enter a short register group name, go with the first
2517 group that matches. */
2518 if (strncmp (start, reggroup_name (group), end - start) == 0)
2526 regnum < gdbarch_num_regs (gdbarch)
2527 + gdbarch_num_pseudo_regs (gdbarch);
2530 if (gdbarch_register_reggroup_p (gdbarch, regnum, group))
2531 gdbarch_print_registers_info (gdbarch,
2539 /* Nothing matched. */
2540 error (_("Invalid register `%.*s'"), (int) (end - start), start);
2545 info_all_registers_command (char *addr_exp, int from_tty)
2547 registers_info (addr_exp, 1);
2551 info_registers_command (char *addr_exp, int from_tty)
2553 registers_info (addr_exp, 0);
2557 print_vector_info (struct ui_file *file,
2558 struct frame_info *frame, const char *args)
2560 struct gdbarch *gdbarch = get_frame_arch (frame);
2562 if (gdbarch_print_vector_info_p (gdbarch))
2563 gdbarch_print_vector_info (gdbarch, file, frame, args);
2567 int printed_something = 0;
2570 regnum < gdbarch_num_regs (gdbarch)
2571 + gdbarch_num_pseudo_regs (gdbarch);
2574 if (gdbarch_register_reggroup_p (gdbarch, regnum, vector_reggroup))
2576 printed_something = 1;
2577 gdbarch_print_registers_info (gdbarch, file, frame, regnum, 1);
2580 if (!printed_something)
2581 fprintf_filtered (file, "No vector information\n");
2586 info_vector_command (char *args, int from_tty)
2588 if (!target_has_registers)
2589 error (_("The program has no registers now."));
2591 print_vector_info (gdb_stdout, get_selected_frame (NULL), args);
2594 /* Kill the inferior process. Make us have no inferior. */
2597 kill_command (const char *arg, int from_tty)
2599 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2600 It should be a distinct flag that indicates that a target is active, cuz
2601 some targets don't have processes! */
2603 if (ptid_equal (inferior_ptid, null_ptid))
2604 error (_("The program is not being run."));
2605 if (!query (_("Kill the program being debugged? ")))
2606 error (_("Not confirmed."));
2609 /* If we still have other inferiors to debug, then don't mess with
2610 with their threads. */
2611 if (!have_inferiors ())
2613 init_thread_list (); /* Destroy thread info. */
2615 /* Killing off the inferior can leave us with a core file. If
2616 so, print the state we are left in. */
2617 if (target_has_stack)
2619 printf_filtered (_("In %s,\n"), target_longname);
2620 print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
2623 bfd_cache_close_all ();
2626 /* Used in `attach&' command. ARG is a point to an integer
2627 representing a process id. Proceed threads of this process iff
2628 they stopped due to debugger request, and when they did, they
2629 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads
2630 that have been explicitly been told to stop. */
2633 proceed_after_attach_callback (struct thread_info *thread,
2636 int pid = * (int *) arg;
2638 if (ptid_get_pid (thread->ptid) == pid
2639 && !is_exited (thread->ptid)
2640 && !is_executing (thread->ptid)
2641 && !thread->stop_requested
2642 && thread->suspend.stop_signal == GDB_SIGNAL_0)
2644 switch_to_thread (thread->ptid);
2645 clear_proceed_status (0);
2646 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
2653 proceed_after_attach (int pid)
2655 /* Don't error out if the current thread is running, because
2656 there may be other stopped threads. */
2658 /* Backup current thread and selected frame. */
2659 scoped_restore_current_thread restore_thread;
2661 iterate_over_threads (proceed_after_attach_callback, &pid);
2664 /* See inferior.h. */
2667 setup_inferior (int from_tty)
2669 struct inferior *inferior;
2671 inferior = current_inferior ();
2672 inferior->needs_setup = 0;
2674 /* If no exec file is yet known, try to determine it from the
2676 if (get_exec_file (0) == NULL)
2677 exec_file_locate_attach (ptid_get_pid (inferior_ptid), 1, from_tty);
2680 reopen_exec_file ();
2684 /* Take any necessary post-attaching actions for this platform. */
2685 target_post_attach (ptid_get_pid (inferior_ptid));
2687 post_create_inferior (¤t_target, from_tty);
2690 /* What to do after the first program stops after attaching. */
2691 enum attach_post_wait_mode
2693 /* Do nothing. Leaves threads as they are. */
2694 ATTACH_POST_WAIT_NOTHING,
2696 /* Re-resume threads that are marked running. */
2697 ATTACH_POST_WAIT_RESUME,
2699 /* Stop all threads. */
2700 ATTACH_POST_WAIT_STOP,
2703 /* Called after we've attached to a process and we've seen it stop for
2704 the first time. If ASYNC_EXEC is true, re-resume threads that
2705 should be running. Else if ATTACH, */
2708 attach_post_wait (const char *args, int from_tty, enum attach_post_wait_mode mode)
2710 struct inferior *inferior;
2712 inferior = current_inferior ();
2713 inferior->control.stop_soon = NO_STOP_QUIETLY;
2715 if (inferior->needs_setup)
2716 setup_inferior (from_tty);
2718 if (mode == ATTACH_POST_WAIT_RESUME)
2720 /* The user requested an `attach&', so be sure to leave threads
2721 that didn't get a signal running. */
2723 /* Immediatelly resume all suspended threads of this inferior,
2724 and this inferior only. This should have no effect on
2725 already running threads. If a thread has been stopped with a
2726 signal, leave it be. */
2728 proceed_after_attach (inferior->pid);
2731 if (inferior_thread ()->suspend.stop_signal == GDB_SIGNAL_0)
2733 clear_proceed_status (0);
2734 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
2738 else if (mode == ATTACH_POST_WAIT_STOP)
2740 /* The user requested a plain `attach', so be sure to leave
2741 the inferior stopped. */
2743 /* At least the current thread is already stopped. */
2745 /* In all-stop, by definition, all threads have to be already
2746 stopped at this point. In non-stop, however, although the
2747 selected thread is stopped, others may still be executing.
2748 Be sure to explicitly stop all threads of the process. This
2749 should have no effect on already stopped threads. */
2751 target_stop (pid_to_ptid (inferior->pid));
2752 else if (target_is_non_stop_p ())
2754 struct thread_info *thread;
2755 struct thread_info *lowest = inferior_thread ();
2756 int pid = current_inferior ()->pid;
2758 stop_all_threads ();
2760 /* It's not defined which thread will report the attach
2761 stop. For consistency, always select the thread with
2762 lowest GDB number, which should be the main thread, if it
2764 ALL_NON_EXITED_THREADS (thread)
2766 if (ptid_get_pid (thread->ptid) == pid)
2768 if (thread->inf->num < lowest->inf->num
2769 || thread->per_inf_num < lowest->per_inf_num)
2774 switch_to_thread (lowest->ptid);
2777 /* Tell the user/frontend where we're stopped. */
2779 if (deprecated_attach_hook)
2780 deprecated_attach_hook ();
2784 struct attach_command_continuation_args
2788 enum attach_post_wait_mode mode;
2792 attach_command_continuation (void *args, int err)
2794 struct attach_command_continuation_args *a
2795 = (struct attach_command_continuation_args *) args;
2800 attach_post_wait (a->args, a->from_tty, a->mode);
2804 attach_command_continuation_free_args (void *args)
2806 struct attach_command_continuation_args *a
2807 = (struct attach_command_continuation_args *) args;
2813 /* "attach" command entry point. Takes a program started up outside
2814 of gdb and ``attaches'' to it. This stops it cold in its tracks
2815 and allows us to start debugging it. */
2818 attach_command (char *args, int from_tty)
2821 struct target_ops *attach_target;
2822 struct inferior *inferior = current_inferior ();
2823 enum attach_post_wait_mode mode;
2825 dont_repeat (); /* Not for the faint of heart */
2827 if (gdbarch_has_global_solist (target_gdbarch ()))
2828 /* Don't complain if all processes share the same symbol
2831 else if (target_has_execution)
2833 if (query (_("A program is being debugged already. Kill it? ")))
2836 error (_("Not killed."));
2839 /* Clean up any leftovers from other runs. Some other things from
2840 this function should probably be moved into target_pre_inferior. */
2841 target_pre_inferior (from_tty);
2843 gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (args, &async_exec);
2844 args = stripped.get ();
2846 attach_target = find_attach_target ();
2848 prepare_execution_command (attach_target, async_exec);
2850 if (non_stop && !attach_target->to_supports_non_stop (attach_target))
2851 error (_("Cannot attach to this target in non-stop mode"));
2853 attach_target->to_attach (attach_target, args, from_tty);
2854 /* to_attach should push the target, so after this point we
2855 shouldn't refer to attach_target again. */
2856 attach_target = NULL;
2858 /* Set up the "saved terminal modes" of the inferior
2859 based on what modes we are starting it with. */
2860 target_terminal::init ();
2862 /* Install inferior's terminal modes. This may look like a no-op,
2863 as we've just saved them above, however, this does more than
2864 restore terminal settings:
2866 - installs a SIGINT handler that forwards SIGINT to the inferior.
2867 Otherwise a Ctrl-C pressed just while waiting for the initial
2868 stop would end up as a spurious Quit.
2870 - removes stdin from the event loop, which we need if attaching
2871 in the foreground, otherwise on targets that report an initial
2872 stop on attach (which are most) we'd process input/commands
2873 while we're in the event loop waiting for that stop. That is,
2874 before the attach continuation runs and the command is really
2876 target_terminal::inferior ();
2878 /* Set up execution context to know that we should return from
2879 wait_for_inferior as soon as the target reports a stop. */
2880 init_wait_for_inferior ();
2881 clear_proceed_status (0);
2883 inferior->needs_setup = 1;
2885 if (target_is_non_stop_p ())
2887 /* If we find that the current thread isn't stopped, explicitly
2888 do so now, because we're going to install breakpoints and
2892 /* The user requested an `attach&'; stop just one thread. */
2893 target_stop (inferior_ptid);
2895 /* The user requested an `attach', so stop all threads of this
2897 target_stop (pid_to_ptid (ptid_get_pid (inferior_ptid)));
2900 mode = async_exec ? ATTACH_POST_WAIT_RESUME : ATTACH_POST_WAIT_STOP;
2902 /* Some system don't generate traps when attaching to inferior.
2903 E.g. Mach 3 or GNU hurd. */
2904 if (!target_attach_no_wait)
2906 struct attach_command_continuation_args *a;
2908 /* Careful here. See comments in inferior.h. Basically some
2909 OSes don't ignore SIGSTOPs on continue requests anymore. We
2910 need a way for handle_inferior_event to reset the stop_signal
2911 variable after an attach, and this is what
2912 STOP_QUIETLY_NO_SIGSTOP is for. */
2913 inferior->control.stop_soon = STOP_QUIETLY_NO_SIGSTOP;
2915 /* Wait for stop. */
2916 a = XNEW (struct attach_command_continuation_args);
2917 a->args = xstrdup (args);
2918 a->from_tty = from_tty;
2920 add_inferior_continuation (attach_command_continuation, a,
2921 attach_command_continuation_free_args);
2923 if (!target_is_async_p ())
2924 mark_infrun_async_event_handler ();
2928 attach_post_wait (args, from_tty, mode);
2931 /* We had just found out that the target was already attached to an
2932 inferior. PTID points at a thread of this new inferior, that is
2933 the most likely to be stopped right now, but not necessarily so.
2934 The new inferior is assumed to be already added to the inferior
2935 list at this point. If LEAVE_RUNNING, then leave the threads of
2936 this inferior running, except those we've explicitly seen reported
2940 notice_new_inferior (ptid_t ptid, int leave_running, int from_tty)
2942 enum attach_post_wait_mode mode
2943 = leave_running ? ATTACH_POST_WAIT_RESUME : ATTACH_POST_WAIT_NOTHING;
2945 gdb::optional<scoped_restore_current_thread> restore_thread;
2947 if (inferior_ptid != null_ptid)
2948 restore_thread.emplace ();
2950 /* Avoid reading registers -- we haven't fetched the target
2952 switch_to_thread_no_regs (find_thread_ptid (ptid));
2954 /* When we "notice" a new inferior we need to do all the things we
2955 would normally do if we had just attached to it. */
2957 if (is_executing (inferior_ptid))
2959 struct attach_command_continuation_args *a;
2960 struct inferior *inferior = current_inferior ();
2962 /* We're going to install breakpoints, and poke at memory,
2963 ensure that the inferior is stopped for a moment while we do
2965 target_stop (inferior_ptid);
2967 inferior->control.stop_soon = STOP_QUIETLY_REMOTE;
2969 /* Wait for stop before proceeding. */
2970 a = XNEW (struct attach_command_continuation_args);
2971 a->args = xstrdup ("");
2972 a->from_tty = from_tty;
2974 add_inferior_continuation (attach_command_continuation, a,
2975 attach_command_continuation_free_args);
2980 attach_post_wait ("" /* args */, from_tty, mode);
2985 * takes a program previously attached to and detaches it.
2986 * The program resumes execution and will no longer stop
2987 * on signals, etc. We better not have left any breakpoints
2988 * in the program or it'll die when it hits one. For this
2989 * to work, it may be necessary for the process to have been
2990 * previously attached. It *might* work if the program was
2991 * started via the normal ptrace (PTRACE_TRACEME).
2995 detach_command (const char *args, int from_tty)
2997 dont_repeat (); /* Not for the faint of heart. */
2999 if (ptid_equal (inferior_ptid, null_ptid))
3000 error (_("The program is not being run."));
3002 query_if_trace_running (from_tty);
3004 disconnect_tracing ();
3006 target_detach (args, from_tty);
3008 /* The current inferior process was just detached successfully. Get
3009 rid of breakpoints that no longer make sense. Note we don't do
3010 this within target_detach because that is also used when
3011 following child forks, and in that case we will want to transfer
3012 breakpoints to the child, not delete them. */
3013 breakpoint_init_inferior (inf_exited);
3015 /* If the solist is global across inferiors, don't clear it when we
3016 detach from a single inferior. */
3017 if (!gdbarch_has_global_solist (target_gdbarch ()))
3018 no_shared_libraries (NULL, from_tty);
3020 /* If we still have inferiors to debug, then don't mess with their
3022 if (!have_inferiors ())
3023 init_thread_list ();
3025 if (deprecated_detach_hook)
3026 deprecated_detach_hook ();
3029 /* Disconnect from the current target without resuming it (leaving it
3030 waiting for a debugger).
3032 We'd better not have left any breakpoints in the program or the
3033 next debugger will get confused. Currently only supported for some
3034 remote targets, since the normal attach mechanisms don't work on
3035 stopped processes on some native platforms (e.g. GNU/Linux). */
3038 disconnect_command (char *args, int from_tty)
3040 dont_repeat (); /* Not for the faint of heart. */
3041 query_if_trace_running (from_tty);
3042 disconnect_tracing ();
3043 target_disconnect (args, from_tty);
3044 no_shared_libraries (NULL, from_tty);
3045 init_thread_list ();
3046 if (deprecated_detach_hook)
3047 deprecated_detach_hook ();
3051 interrupt_target_1 (int all_threads)
3056 ptid = minus_one_ptid;
3058 ptid = inferior_ptid;
3063 target_interrupt (ptid);
3065 /* Tag the thread as having been explicitly requested to stop, so
3066 other parts of gdb know not to resume this thread automatically,
3067 if it was stopped due to an internal event. Limit this to
3068 non-stop mode, as when debugging a multi-threaded application in
3069 all-stop mode, we will only get one stop event --- it's undefined
3070 which thread will report the event. */
3072 set_stop_requested (ptid, 1);
3076 Stop the execution of the target while running in async mode, in
3077 the background. In all-stop, stop the whole process. In non-stop
3078 mode, stop the current thread only by default, or stop all threads
3079 if the `-a' switch is used. */
3082 interrupt_command (char *args, int from_tty)
3084 if (target_can_async_p ())
3086 int all_threads = 0;
3088 dont_repeat (); /* Not for the faint of heart. */
3091 && startswith (args, "-a"))
3094 if (!non_stop && all_threads)
3095 error (_("-a is meaningless in all-stop mode."));
3097 interrupt_target_1 (all_threads);
3101 /* See inferior.h. */
3104 default_print_float_info (struct gdbarch *gdbarch, struct ui_file *file,
3105 struct frame_info *frame, const char *args)
3108 int printed_something = 0;
3111 regnum < gdbarch_num_regs (gdbarch)
3112 + gdbarch_num_pseudo_regs (gdbarch);
3115 if (gdbarch_register_reggroup_p (gdbarch, regnum, float_reggroup))
3117 printed_something = 1;
3118 gdbarch_print_registers_info (gdbarch, file, frame, regnum, 1);
3121 if (!printed_something)
3122 fprintf_filtered (file, "No floating-point info "
3123 "available for this processor.\n");
3127 info_float_command (char *args, int from_tty)
3129 struct frame_info *frame;
3131 if (!target_has_registers)
3132 error (_("The program has no registers now."));
3134 frame = get_selected_frame (NULL);
3135 gdbarch_print_float_info (get_frame_arch (frame), gdb_stdout, frame, args);
3139 unset_command (const char *args, int from_tty)
3141 printf_filtered (_("\"unset\" must be followed by the "
3142 "name of an unset subcommand.\n"));
3143 help_list (unsetlist, "unset ", all_commands, gdb_stdout);
3146 /* Implement `info proc' family of commands. */
3149 info_proc_cmd_1 (const char *args, enum info_proc_what what, int from_tty)
3151 struct gdbarch *gdbarch = get_current_arch ();
3153 if (!target_info_proc (args, what))
3155 if (gdbarch_info_proc_p (gdbarch))
3156 gdbarch_info_proc (gdbarch, args, what);
3158 error (_("Not supported on this target."));
3162 /* Implement `info proc' when given without any futher parameters. */
3165 info_proc_cmd (const char *args, int from_tty)
3167 info_proc_cmd_1 (args, IP_MINIMAL, from_tty);
3170 /* Implement `info proc mappings'. */
3173 info_proc_cmd_mappings (const char *args, int from_tty)
3175 info_proc_cmd_1 (args, IP_MAPPINGS, from_tty);
3178 /* Implement `info proc stat'. */
3181 info_proc_cmd_stat (const char *args, int from_tty)
3183 info_proc_cmd_1 (args, IP_STAT, from_tty);
3186 /* Implement `info proc status'. */
3189 info_proc_cmd_status (const char *args, int from_tty)
3191 info_proc_cmd_1 (args, IP_STATUS, from_tty);
3194 /* Implement `info proc cwd'. */
3197 info_proc_cmd_cwd (const char *args, int from_tty)
3199 info_proc_cmd_1 (args, IP_CWD, from_tty);
3202 /* Implement `info proc cmdline'. */
3205 info_proc_cmd_cmdline (const char *args, int from_tty)
3207 info_proc_cmd_1 (args, IP_CMDLINE, from_tty);
3210 /* Implement `info proc exe'. */
3213 info_proc_cmd_exe (const char *args, int from_tty)
3215 info_proc_cmd_1 (args, IP_EXE, from_tty);
3218 /* Implement `info proc all'. */
3221 info_proc_cmd_all (const char *args, int from_tty)
3223 info_proc_cmd_1 (args, IP_ALL, from_tty);
3226 /* This help string is used for the run, start, and starti commands.
3227 It is defined as a macro to prevent duplication. */
3229 #define RUN_ARGS_HELP \
3230 "You may specify arguments to give it.\n\
3231 Args may include \"*\", or \"[...]\"; they are expanded using the\n\
3232 shell that will start the program (specified by the \"$SHELL\" environment\n\
3233 variable). Input and output redirection with \">\", \"<\", or \">>\"\n\
3234 are also allowed.\n\
3236 With no arguments, uses arguments last specified (with \"run\" or \n\
3237 \"set args\"). To cancel previous arguments and run with no arguments,\n\
3238 use \"set args\" without arguments.\n\
3240 To start the inferior without using a shell, use \"set startup-with-shell off\"."
3243 _initialize_infcmd (void)
3245 static struct cmd_list_element *info_proc_cmdlist;
3246 struct cmd_list_element *c = NULL;
3247 const char *cmd_name;
3249 /* Add the filename of the terminal connected to inferior I/O. */
3250 add_setshow_optional_filename_cmd ("inferior-tty", class_run,
3251 &inferior_io_terminal_scratch, _("\
3252 Set terminal for future runs of program being debugged."), _("\
3253 Show terminal for future runs of program being debugged."), _("\
3254 Usage: set inferior-tty [TTY]\n\n\
3255 If TTY is omitted, the default behavior of using the same terminal as GDB\n\
3257 set_inferior_tty_command,
3258 show_inferior_tty_command,
3259 &setlist, &showlist);
3260 cmd_name = "inferior-tty";
3261 c = lookup_cmd (&cmd_name, setlist, "", -1, 1);
3262 gdb_assert (c != NULL);
3263 add_alias_cmd ("tty", c, class_alias, 0, &cmdlist);
3266 add_setshow_string_noescape_cmd (cmd_name, class_run,
3267 &inferior_args_scratch, _("\
3268 Set argument list to give program being debugged when it is started."), _("\
3269 Show argument list to give program being debugged when it is started."), _("\
3270 Follow this command with any number of args, to be passed to the program."),
3273 &setlist, &showlist);
3274 c = lookup_cmd (&cmd_name, setlist, "", -1, 1);
3275 gdb_assert (c != NULL);
3276 set_cmd_completer (c, filename_completer);
3279 add_setshow_string_noescape_cmd (cmd_name, class_run,
3280 &inferior_cwd_scratch, _("\
3281 Set the current working directory to be used when the inferior is started.\n\
3282 Changing this setting does not have any effect on inferiors that are\n\
3285 Show the current working directory that is used when the inferior is started."),
3287 Use this command to change the current working directory that will be used\n\
3288 when the inferior is started. This setting does not affect GDB's current\n\
3289 working directory."),
3292 &setlist, &showlist);
3293 c = lookup_cmd (&cmd_name, setlist, "", -1, 1);
3294 gdb_assert (c != NULL);
3295 set_cmd_completer (c, filename_completer);
3297 c = add_cmd ("environment", no_class, environment_info, _("\
3298 The environment to give the program, or one variable's value.\n\
3299 With an argument VAR, prints the value of environment variable VAR to\n\
3300 give the program being debugged. With no arguments, prints the entire\n\
3301 environment to be given to the program."), &showlist);
3302 set_cmd_completer (c, noop_completer);
3304 add_prefix_cmd ("unset", no_class, unset_command,
3305 _("Complement to certain \"set\" commands."),
3306 &unsetlist, "unset ", 0, &cmdlist);
3308 c = add_cmd ("environment", class_run, unset_environment_command, _("\
3309 Cancel environment variable VAR for the program.\n\
3310 This does not affect the program until the next \"run\" command."),
3312 set_cmd_completer (c, noop_completer);
3314 c = add_cmd ("environment", class_run, set_environment_command, _("\
3315 Set environment variable value to give the program.\n\
3316 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3317 VALUES of environment variables are uninterpreted strings.\n\
3318 This does not affect the program until the next \"run\" command."),
3320 set_cmd_completer (c, noop_completer);
3322 c = add_com ("path", class_files, path_command, _("\
3323 Add directory DIR(s) to beginning of search path for object files.\n\
3324 $cwd in the path means the current working directory.\n\
3325 This path is equivalent to the $PATH shell variable. It is a list of\n\
3326 directories, separated by colons. These directories are searched to find\n\
3327 fully linked executable files and separately compiled object files as \
3329 set_cmd_completer (c, filename_completer);
3331 c = add_cmd ("paths", no_class, path_info, _("\
3332 Current search path for finding object files.\n\
3333 $cwd in the path means the current working directory.\n\
3334 This path is equivalent to the $PATH shell variable. It is a list of\n\
3335 directories, separated by colons. These directories are searched to find\n\
3336 fully linked executable files and separately compiled object files as \
3339 set_cmd_completer (c, noop_completer);
3341 add_prefix_cmd ("kill", class_run, kill_command,
3342 _("Kill execution of program being debugged."),
3343 &killlist, "kill ", 0, &cmdlist);
3345 add_com ("attach", class_run, attach_command, _("\
3346 Attach to a process or file outside of GDB.\n\
3347 This command attaches to another target, of the same type as your last\n\
3348 \"target\" command (\"info files\" will show your target stack).\n\
3349 The command may take as argument a process id or a device file.\n\
3350 For a process id, you must have permission to send the process a signal,\n\
3351 and it must have the same effective uid as the debugger.\n\
3352 When using \"attach\" with a process id, the debugger finds the\n\
3353 program running in the process, looking first in the current working\n\
3354 directory, or (if not found there) using the source file search path\n\
3355 (see the \"directory\" command). You can also use the \"file\" command\n\
3356 to specify the program, and to load its symbol table."));
3358 add_prefix_cmd ("detach", class_run, detach_command, _("\
3359 Detach a process or file previously attached.\n\
3360 If a process, it is no longer traced, and it continues its execution. If\n\
3361 you were debugging a file, the file is closed and gdb no longer accesses it."),
3362 &detachlist, "detach ", 0, &cmdlist);
3364 add_com ("disconnect", class_run, disconnect_command, _("\
3365 Disconnect from a target.\n\
3366 The target will wait for another debugger to connect. Not available for\n\
3369 c = add_com ("signal", class_run, signal_command, _("\
3370 Continue program with the specified signal.\n\
3371 Usage: signal SIGNAL\n\
3372 The SIGNAL argument is processed the same as the handle command.\n\
3374 An argument of \"0\" means continue the program without sending it a signal.\n\
3375 This is useful in cases where the program stopped because of a signal,\n\
3376 and you want to resume the program while discarding the signal.\n\
3378 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3379 the current thread only."));
3380 set_cmd_completer (c, signal_completer);
3382 c = add_com ("queue-signal", class_run, queue_signal_command, _("\
3383 Queue a signal to be delivered to the current thread when it is resumed.\n\
3384 Usage: queue-signal SIGNAL\n\
3385 The SIGNAL argument is processed the same as the handle command.\n\
3386 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3388 An argument of \"0\" means remove any currently queued signal from\n\
3389 the current thread. This is useful in cases where the program stopped\n\
3390 because of a signal, and you want to resume it while discarding the signal.\n\
3392 In a multi-threaded program the signal is queued with, or discarded from,\n\
3393 the current thread only."));
3394 set_cmd_completer (c, signal_completer);
3396 add_com ("stepi", class_run, stepi_command, _("\
3397 Step one instruction exactly.\n\
3399 Argument N means step N times (or till program stops for another \
3401 add_com_alias ("si", "stepi", class_alias, 0);
3403 add_com ("nexti", class_run, nexti_command, _("\
3404 Step one instruction, but proceed through subroutine calls.\n\
3406 Argument N means step N times (or till program stops for another \
3408 add_com_alias ("ni", "nexti", class_alias, 0);
3410 add_com ("finish", class_run, finish_command, _("\
3411 Execute until selected stack frame returns.\n\
3413 Upon return, the value returned is printed and put in the value history."));
3414 add_com_alias ("fin", "finish", class_run, 1);
3416 add_com ("next", class_run, next_command, _("\
3417 Step program, proceeding through subroutine calls.\n\
3419 Unlike \"step\", if the current source line calls a subroutine,\n\
3420 this command does not enter the subroutine, but instead steps over\n\
3421 the call, in effect treating it as a single source line."));
3422 add_com_alias ("n", "next", class_run, 1);
3424 add_com ("step", class_run, step_command, _("\
3425 Step program until it reaches a different source line.\n\
3427 Argument N means step N times (or till program stops for another \
3429 add_com_alias ("s", "step", class_run, 1);
3431 c = add_com ("until", class_run, until_command, _("\
3432 Execute until the program reaches a source line greater than the current\n\
3433 or a specified location (same args as break command) within the current \
3435 set_cmd_completer (c, location_completer);
3436 add_com_alias ("u", "until", class_run, 1);
3438 c = add_com ("advance", class_run, advance_command, _("\
3439 Continue the program up to the given location (same form as args for break \
3441 Execution will also stop upon exit from the current stack frame."));
3442 set_cmd_completer (c, location_completer);
3444 c = add_com ("jump", class_run, jump_command, _("\
3445 Continue program being debugged at specified line or address.\n\
3446 Usage: jump <location>\n\
3447 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3448 for an address to start at."));
3449 set_cmd_completer (c, location_completer);
3450 add_com_alias ("j", "jump", class_run, 1);
3452 add_com ("continue", class_run, continue_command, _("\
3453 Continue program being debugged, after signal or breakpoint.\n\
3454 Usage: continue [N]\n\
3455 If proceeding from breakpoint, a number N may be used as an argument,\n\
3456 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3457 the breakpoint won't break until the Nth time it is reached).\n\
3459 If non-stop mode is enabled, continue only the current thread,\n\
3460 otherwise all the threads in the program are continued. To \n\
3461 continue all stopped threads in non-stop mode, use the -a option.\n\
3462 Specifying -a and an ignore count simultaneously is an error."));
3463 add_com_alias ("c", "cont", class_run, 1);
3464 add_com_alias ("fg", "cont", class_run, 1);
3466 c = add_com ("run", class_run, run_command, _("\
3467 Start debugged program.\n"
3469 set_cmd_completer (c, filename_completer);
3470 add_com_alias ("r", "run", class_run, 1);
3472 c = add_com ("start", class_run, start_command, _("\
3473 Start the debugged program stopping at the beginning of the main procedure.\n"
3475 set_cmd_completer (c, filename_completer);
3477 c = add_com ("starti", class_run, starti_command, _("\
3478 Start the debugged program stopping at the first instruction.\n"
3480 set_cmd_completer (c, filename_completer);
3482 add_com ("interrupt", class_run, interrupt_command,
3483 _("Interrupt the execution of the debugged program.\n\
3484 If non-stop mode is enabled, interrupt only the current thread,\n\
3485 otherwise all the threads in the program are stopped. To \n\
3486 interrupt all running threads in non-stop mode, use the -a option."));
3488 c = add_info ("registers", info_registers_command, _("\
3489 List of integer registers and their contents, for selected stack frame.\n\
3490 Register name as argument means describe only that register."));
3491 add_info_alias ("r", "registers", 1);
3492 set_cmd_completer (c, reg_or_group_completer);
3494 c = add_info ("all-registers", info_all_registers_command, _("\
3495 List of all registers and their contents, for selected stack frame.\n\
3496 Register name as argument means describe only that register."));
3497 set_cmd_completer (c, reg_or_group_completer);
3499 add_info ("program", info_program_command,
3500 _("Execution status of the program."));
3502 add_info ("float", info_float_command,
3503 _("Print the status of the floating point unit\n"));
3505 add_info ("vector", info_vector_command,
3506 _("Print the status of the vector unit\n"));
3508 add_prefix_cmd ("proc", class_info, info_proc_cmd,
3510 Show /proc process information about any running process.\n\
3511 Specify any process id, or use the program being debugged by default."),
3512 &info_proc_cmdlist, "info proc ",
3513 1/*allow-unknown*/, &infolist);
3515 add_cmd ("mappings", class_info, info_proc_cmd_mappings, _("\
3516 List of mapped memory regions."),
3517 &info_proc_cmdlist);
3519 add_cmd ("stat", class_info, info_proc_cmd_stat, _("\
3520 List process info from /proc/PID/stat."),
3521 &info_proc_cmdlist);
3523 add_cmd ("status", class_info, info_proc_cmd_status, _("\
3524 List process info from /proc/PID/status."),
3525 &info_proc_cmdlist);
3527 add_cmd ("cwd", class_info, info_proc_cmd_cwd, _("\
3528 List current working directory of the process."),
3529 &info_proc_cmdlist);
3531 add_cmd ("cmdline", class_info, info_proc_cmd_cmdline, _("\
3532 List command line arguments of the process."),
3533 &info_proc_cmdlist);
3535 add_cmd ("exe", class_info, info_proc_cmd_exe, _("\
3536 List absolute filename for executable of the process."),
3537 &info_proc_cmdlist);
3539 add_cmd ("all", class_info, info_proc_cmd_all, _("\
3540 List all available /proc info."),
3541 &info_proc_cmdlist);