1 /* Memory-access and commands for "inferior" process, for GDB.
3 Copyright (C) 1986-2018 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"
45 #include "observable.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"
64 /* Local functions: */
66 static void until_next_command (int);
68 static void step_1 (int, int, const char *);
70 #define ERROR_NO_INFERIOR \
71 if (!target_has_execution) error (_("The program is not being run."));
73 /* Scratch area where string containing arguments to give to the
74 program will be stored by 'set args'. As soon as anything is
75 stored, notice_args_set will move it into per-inferior storage.
76 Arguments are separated by spaces. Empty string (pointer to '\0')
79 static char *inferior_args_scratch;
81 /* Scratch area where the new cwd will be stored by 'set cwd'. */
83 static char *inferior_cwd_scratch;
85 /* Scratch area where 'set inferior-tty' will store user-provided value.
86 We'll immediate copy it into per-inferior storage. */
88 static char *inferior_io_terminal_scratch;
90 /* Pid of our debugged inferior, or 0 if no inferior now.
91 Since various parts of infrun.c test this to see whether there is a program
92 being debugged it should be nonzero (currently 3 is used) for remote
97 /* Address at which inferior stopped. */
101 /* Nonzero if stopped due to completion of a stack dummy routine. */
103 enum stop_stack_kind stop_stack_dummy;
105 /* Nonzero if stopped due to a random (unexpected) signal in inferior
108 int stopped_by_random_signal;
110 /* See inferior.h. */
112 int startup_with_shell = 1;
115 /* Accessor routines. */
117 /* Set the io terminal for the current inferior. Ownership of
118 TERMINAL_NAME is not transferred. */
121 set_inferior_io_terminal (const char *terminal_name)
123 xfree (current_inferior ()->terminal);
125 if (terminal_name != NULL && *terminal_name != '\0')
126 current_inferior ()->terminal = xstrdup (terminal_name);
128 current_inferior ()->terminal = NULL;
132 get_inferior_io_terminal (void)
134 return current_inferior ()->terminal;
138 set_inferior_tty_command (const char *args, int from_tty,
139 struct cmd_list_element *c)
141 /* CLI has assigned the user-provided value to inferior_io_terminal_scratch.
142 Now route it to current inferior. */
143 set_inferior_io_terminal (inferior_io_terminal_scratch);
147 show_inferior_tty_command (struct ui_file *file, int from_tty,
148 struct cmd_list_element *c, const char *value)
150 /* Note that we ignore the passed-in value in favor of computing it
152 const char *inferior_io_terminal = get_inferior_io_terminal ();
154 if (inferior_io_terminal == NULL)
155 inferior_io_terminal = "";
156 fprintf_filtered (gdb_stdout,
157 _("Terminal for future runs of program being debugged "
158 "is \"%s\".\n"), inferior_io_terminal);
162 get_inferior_args (void)
164 if (current_inferior ()->argc != 0)
168 n = construct_inferior_arguments (current_inferior ()->argc,
169 current_inferior ()->argv);
170 set_inferior_args (n);
174 if (current_inferior ()->args == NULL)
175 current_inferior ()->args = xstrdup ("");
177 return current_inferior ()->args;
180 /* Set the arguments for the current inferior. Ownership of
181 NEWARGS is not transferred. */
184 set_inferior_args (const char *newargs)
186 xfree (current_inferior ()->args);
187 current_inferior ()->args = newargs ? xstrdup (newargs) : NULL;
188 current_inferior ()->argc = 0;
189 current_inferior ()->argv = 0;
193 set_inferior_args_vector (int argc, char **argv)
195 current_inferior ()->argc = argc;
196 current_inferior ()->argv = argv;
199 /* Notice when `set args' is run. */
202 set_args_command (const char *args, int from_tty, struct cmd_list_element *c)
204 /* CLI has assigned the user-provided value to inferior_args_scratch.
205 Now route it to current inferior. */
206 set_inferior_args (inferior_args_scratch);
209 /* Notice when `show args' is run. */
212 show_args_command (struct ui_file *file, int from_tty,
213 struct cmd_list_element *c, const char *value)
215 /* Note that we ignore the passed-in value in favor of computing it
217 deprecated_show_value_hack (file, from_tty, c, get_inferior_args ());
220 /* See common/common-inferior.h. */
223 set_inferior_cwd (const char *cwd)
225 struct inferior *inf = current_inferior ();
227 gdb_assert (inf != NULL);
232 inf->cwd.reset (xstrdup (cwd));
235 /* See common/common-inferior.h. */
240 return current_inferior ()->cwd.get ();
243 /* Handle the 'set cwd' command. */
246 set_cwd_command (const char *args, int from_tty, struct cmd_list_element *c)
248 if (*inferior_cwd_scratch == '\0')
249 set_inferior_cwd (NULL);
251 set_inferior_cwd (inferior_cwd_scratch);
254 /* Handle the 'show cwd' command. */
257 show_cwd_command (struct ui_file *file, int from_tty,
258 struct cmd_list_element *c, const char *value)
260 const char *cwd = get_inferior_cwd ();
263 fprintf_filtered (gdb_stdout,
265 You have not set the inferior's current working directory.\n\
266 The inferior will inherit GDB's cwd if native debugging, or the remote\n\
267 server's cwd if remote debugging.\n"));
269 fprintf_filtered (gdb_stdout,
270 _("Current working directory that will be used "
271 "when starting the inferior is \"%s\".\n"), cwd);
275 /* Compute command-line string given argument vector. This does the
276 same shell processing as fork_inferior. */
279 construct_inferior_arguments (int argc, char **argv)
283 if (startup_with_shell)
286 /* This holds all the characters considered special to the
288 static const char special[] = "\"!&*|[]{}<>?`~^=;, \t\n";
289 static const char quote = '"';
291 /* This holds all the characters considered special to the
292 typical Unix shells. We include `^' because the SunOS
293 /bin/sh treats it as a synonym for `|'. */
294 static const char special[] = "\"!#$&*()\\|[]{}<>?'`~^; \t\n";
295 static const char quote = '\'';
301 /* We over-compute the size. It shouldn't matter. */
302 for (i = 0; i < argc; ++i)
303 length += 3 * strlen (argv[i]) + 1 + 2 * (argv[i][0] == '\0');
305 result = (char *) xmalloc (length);
308 for (i = 0; i < argc; ++i)
313 /* Need to handle empty arguments specially. */
314 if (argv[i][0] == '\0')
324 if (strpbrk (argv[i], special))
330 for (cp = argv[i]; *cp; ++cp)
334 /* A newline cannot be quoted with a backslash (it
335 just disappears), only by putting it inside
346 if (strchr (special, *cp) != NULL)
362 /* In this case we can't handle arguments that contain spaces,
363 tabs, or newlines -- see breakup_args(). */
367 for (i = 0; i < argc; ++i)
369 char *cp = strchr (argv[i], ' ');
371 cp = strchr (argv[i], '\t');
373 cp = strchr (argv[i], '\n');
375 error (_("can't handle command-line "
376 "argument containing whitespace"));
377 length += strlen (argv[i]) + 1;
380 result = (char *) xmalloc (length);
382 for (i = 0; i < argc; ++i)
385 strcat (result, " ");
386 strcat (result, argv[i]);
394 /* This function strips the '&' character (indicating background
395 execution) that is added as *the last* of the arguments ARGS of a
396 command. A copy of the incoming ARGS without the '&' is returned,
397 unless the resulting string after stripping is empty, in which case
398 NULL is returned. *BG_CHAR_P is an output boolean that indicates
399 whether the '&' character was found. */
401 static gdb::unique_xmalloc_ptr<char>
402 strip_bg_char (const char *args, int *bg_char_p)
406 if (args == NULL || *args == '\0')
412 p = args + strlen (args);
416 while (p > args && isspace (p[-1]))
421 return gdb::unique_xmalloc_ptr<char>
422 (savestring (args, p - args));
424 return gdb::unique_xmalloc_ptr<char> (nullptr);
428 return gdb::unique_xmalloc_ptr<char> (xstrdup (args));
431 /* Common actions to take after creating any sort of inferior, by any
432 means (running, attaching, connecting, et cetera). The target
433 should be stopped. */
436 post_create_inferior (struct target_ops *target, int from_tty)
439 /* Be sure we own the terminal in case write operations are performed. */
440 target_terminal::ours_for_output ();
442 /* If the target hasn't taken care of this already, do it now.
443 Targets which need to access registers during to_open,
444 to_create_inferior, or to_attach should do it earlier; but many
446 target_find_description ();
448 /* Now that we know the register layout, retrieve current PC. But
449 if the PC is unavailable (e.g., we're opening a core file with
450 missing registers info), ignore it. */
454 stop_pc = regcache_read_pc (get_current_regcache ());
456 CATCH (ex, RETURN_MASK_ERROR)
458 if (ex.error != NOT_AVAILABLE_ERROR)
459 throw_exception (ex);
465 const unsigned solib_add_generation
466 = current_program_space->solib_add_generation;
468 /* Create the hooks to handle shared library load and unload
470 solib_create_inferior_hook (from_tty);
472 if (current_program_space->solib_add_generation == solib_add_generation)
474 /* The platform-specific hook should load initial shared libraries,
475 but didn't. FROM_TTY will be incorrectly 0 but such solib
476 targets should be fixed anyway. Call it only after the solib
477 target has been initialized by solib_create_inferior_hook. */
480 warning (_("platform-specific solib_create_inferior_hook did "
481 "not load initial shared libraries."));
483 /* If the solist is global across processes, there's no need to
485 if (!gdbarch_has_global_solist (target_gdbarch ()))
486 solib_add (NULL, 0, auto_solib_add);
490 /* If the user sets watchpoints before execution having started,
491 then she gets software watchpoints, because GDB can't know which
492 target will end up being pushed, or if it supports hardware
493 watchpoints or not. breakpoint_re_set takes care of promoting
494 watchpoints to hardware watchpoints if possible, however, if this
495 new inferior doesn't load shared libraries or we don't pull in
496 symbols from any other source on this target/arch,
497 breakpoint_re_set is never called. Call it now so that software
498 watchpoints get a chance to be promoted to hardware watchpoints
499 if the now pushed target supports hardware watchpoints. */
500 breakpoint_re_set ();
502 gdb::observers::inferior_created.notify (target, from_tty);
505 /* Kill the inferior if already running. This function is designed
506 to be called when we are about to start the execution of the program
507 from the beginning. Ask the user to confirm that he wants to restart
508 the program being debugged when FROM_TTY is non-null. */
511 kill_if_already_running (int from_tty)
513 if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution)
515 /* Bail out before killing the program if we will not be able to
517 target_require_runnable ();
520 && !query (_("The program being debugged has been started already.\n\
521 Start it from the beginning? ")))
522 error (_("Program not restarted."));
527 /* See inferior.h. */
530 prepare_execution_command (struct target_ops *target, int background)
532 /* If we get a request for running in the bg but the target
533 doesn't support it, error out. */
534 if (background && !target->can_async_p ())
535 error (_("Asynchronous execution not supported on this target."));
539 /* If we get a request for running in the fg, then we need to
540 simulate synchronous (fg) execution. Note no cleanup is
541 necessary for this. stdin is re-enabled whenever an error
542 reaches the top level. */
543 all_uis_on_sync_execution_starting ();
547 /* Determine how the new inferior will behave. */
551 /* Run program without any explicit stop during startup. */
554 /* Stop at the beginning of the program's main function. */
557 /* Stop at the first instruction of the program. */
558 RUN_STOP_AT_FIRST_INSN
561 /* Implement the "run" command. Force a stop during program start if
562 requested by RUN_HOW. */
565 run_command_1 (const char *args, int from_tty, enum run_how run_how)
567 const char *exec_file;
568 struct ui_out *uiout = current_uiout;
569 struct target_ops *run_target;
574 kill_if_already_running (from_tty);
576 init_wait_for_inferior ();
577 clear_breakpoint_hit_counts ();
579 /* Clean up any leftovers from other runs. Some other things from
580 this function should probably be moved into target_pre_inferior. */
581 target_pre_inferior (from_tty);
583 /* The comment here used to read, "The exec file is re-read every
584 time we do a generic_mourn_inferior, so we just have to worry
585 about the symbol file." The `generic_mourn_inferior' function
586 gets called whenever the program exits. However, suppose the
587 program exits, and *then* the executable file changes? We need
588 to check again here. Since reopen_exec_file doesn't do anything
589 if the timestamp hasn't changed, I don't see the harm. */
593 gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (args, &async_exec);
594 args = stripped.get ();
596 /* Do validation and preparation before possibly changing anything
599 run_target = find_run_target ();
601 prepare_execution_command (run_target, async_exec);
603 if (non_stop && !run_target->supports_non_stop ())
604 error (_("The target does not support running in non-stop mode."));
606 /* Done. Can now set breakpoints, change inferior args, etc. */
608 /* Insert temporary breakpoint in main function if requested. */
609 if (run_how == RUN_STOP_AT_MAIN)
610 tbreak_command (main_name (), 0);
612 exec_file = get_exec_file (0);
614 /* We keep symbols from add-symbol-file, on the grounds that the
615 user might want to add some symbols before running the program
616 (right?). But sometimes (dynamic loading where the user manually
617 introduces the new symbols with add-symbol-file), the code which
618 the symbols describe does not persist between runs. Currently
619 the user has to manually nuke all symbols between runs if they
620 want them to go away (PR 2207). This is probably reasonable. */
622 /* If there were other args, beside '&', process them. */
624 set_inferior_args (args);
628 uiout->field_string (NULL, "Starting program");
631 uiout->field_string ("execfile", exec_file);
633 /* We call get_inferior_args() because we might need to compute
635 uiout->field_string ("infargs", get_inferior_args ());
640 /* We call get_inferior_args() because we might need to compute
642 run_target->create_inferior (exec_file,
643 std::string (get_inferior_args ()),
644 current_inferior ()->environment.envp (),
646 /* to_create_inferior should push the target, so after this point we
647 shouldn't refer to run_target again. */
650 /* We're starting off a new process. When we get out of here, in
651 non-stop mode, finish the state of all threads of that process,
652 but leave other threads alone, as they may be stopped in internal
653 events --- the frontend shouldn't see them as stopped. In
654 all-stop, always finish the state of all threads, as we may be
655 resuming more than just the new process. */
656 ptid_t finish_ptid = (non_stop
657 ? ptid_t (current_inferior ()->pid)
659 scoped_finish_thread_state finish_state (finish_ptid);
661 /* Pass zero for FROM_TTY, because at this point the "run" command
662 has done its thing; now we are setting up the running program. */
663 post_create_inferior (current_top_target (), 0);
665 /* Queue a pending event so that the program stops immediately. */
666 if (run_how == RUN_STOP_AT_FIRST_INSN)
668 thread_info *thr = inferior_thread ();
669 thr->suspend.waitstatus_pending_p = 1;
670 thr->suspend.waitstatus.kind = TARGET_WAITKIND_STOPPED;
671 thr->suspend.waitstatus.value.sig = GDB_SIGNAL_0;
674 /* Start the target running. Do not use -1 continuation as it would skip
675 breakpoint right at the entry point. */
676 proceed (regcache_read_pc (get_current_regcache ()), GDB_SIGNAL_0);
678 /* Since there was no error, there's no need to finish the thread
680 finish_state.release ();
684 run_command (const char *args, int from_tty)
686 run_command_1 (args, from_tty, RUN_NORMAL);
689 /* Start the execution of the program up until the beginning of the main
693 start_command (const char *args, int from_tty)
695 /* Some languages such as Ada need to search inside the program
696 minimal symbols for the location where to put the temporary
697 breakpoint before starting. */
698 if (!have_minimal_symbols ())
699 error (_("No symbol table loaded. Use the \"file\" command."));
701 /* Run the program until reaching the main procedure... */
702 run_command_1 (args, from_tty, RUN_STOP_AT_MAIN);
705 /* Start the execution of the program stopping at the first
709 starti_command (const char *args, int from_tty)
711 run_command_1 (args, from_tty, RUN_STOP_AT_FIRST_INSN);
715 proceed_thread_callback (struct thread_info *thread, void *arg)
717 /* We go through all threads individually instead of compressing
718 into a single target `resume_all' request, because some threads
719 may be stopped in internal breakpoints/events, or stopped waiting
720 for its turn in the displaced stepping queue (that is, they are
721 running && !executing). The target side has no idea about why
722 the thread is stopped, so a `resume_all' command would resume too
723 much. If/when GDB gains a way to tell the target `hold this
724 thread stopped until I say otherwise', then we can optimize
726 if (thread->state != THREAD_STOPPED)
729 switch_to_thread (thread);
730 clear_proceed_status (0);
731 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
736 ensure_valid_thread (void)
738 if (inferior_ptid == null_ptid
739 || inferior_thread ()->state == THREAD_EXITED)
740 error (_("Cannot execute this command without a live selected thread."));
743 /* If the user is looking at trace frames, any resumption of execution
744 is likely to mix up recorded and live target data. So simply
745 disallow those commands. */
748 ensure_not_tfind_mode (void)
750 if (get_traceframe_number () >= 0)
751 error (_("Cannot execute this command while looking at trace frames."));
754 /* Throw an error indicating the current thread is running. */
757 error_is_running (void)
759 error (_("Cannot execute this command while "
760 "the selected thread is running."));
763 /* Calls error_is_running if the current thread is running. */
766 ensure_not_running (void)
768 if (inferior_thread ()->state == THREAD_RUNNING)
773 continue_1 (int all_threads)
776 ensure_not_tfind_mode ();
778 if (non_stop && all_threads)
780 /* Don't error out if the current thread is running, because
781 there may be other stopped threads. */
783 /* Backup current thread and selected frame and restore on scope
785 scoped_restore_current_thread restore_thread;
787 iterate_over_threads (proceed_thread_callback, NULL);
789 if (current_ui->prompt_state == PROMPT_BLOCKED)
791 /* If all threads in the target were already running,
792 proceed_thread_callback ends up never calling proceed,
793 and so nothing calls this to put the inferior's terminal
794 settings in effect and remove stdin from the event loop,
795 which we must when running a foreground command. E.g.:
799 <all threads are running now>
802 <no thread was resumed, but the inferior now owns the terminal>
804 target_terminal::inferior ();
809 ensure_valid_thread ();
810 ensure_not_running ();
811 clear_proceed_status (0);
812 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
816 /* continue [-a] [proceed-count] [&] */
819 continue_command (const char *args, int from_tty)
826 /* Find out whether we must run in the background. */
827 gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (args, &async_exec);
828 args = stripped.get ();
832 if (startswith (args, "-a"))
835 args += sizeof ("-a") - 1;
841 if (!non_stop && all_threads)
842 error (_("`-a' is meaningless in all-stop mode."));
844 if (args != NULL && all_threads)
845 error (_("Can't resume all threads and specify "
846 "proceed count simultaneously."));
848 /* If we have an argument left, set proceed count of breakpoint we
855 struct thread_info *tp;
858 tp = inferior_thread ();
862 struct target_waitstatus ws;
864 get_last_target_status (&last_ptid, &ws);
865 tp = find_thread_ptid (last_ptid);
868 bs = tp->control.stop_bpstat;
870 while ((stat = bpstat_num (&bs, &num)) != 0)
873 set_ignore_count (num,
874 parse_and_eval_long (args) - 1,
876 /* set_ignore_count prints a message ending with a period.
877 So print two spaces before "Continuing.". */
879 printf_filtered (" ");
883 if (!stopped && from_tty)
886 ("Not stopped at any breakpoint; argument ignored.\n");
891 ensure_not_tfind_mode ();
893 if (!non_stop || !all_threads)
895 ensure_valid_thread ();
896 ensure_not_running ();
899 prepare_execution_command (current_top_target (), async_exec);
902 printf_filtered (_("Continuing.\n"));
904 continue_1 (all_threads);
907 /* Record the starting point of a "step" or "next" command. */
910 set_step_frame (void)
912 frame_info *frame = get_current_frame ();
914 symtab_and_line sal = find_frame_sal (frame);
915 set_step_info (frame, sal);
917 CORE_ADDR pc = get_frame_pc (frame);
918 thread_info *tp = inferior_thread ();
919 tp->control.step_start_function = find_pc_function (pc);
922 /* Step until outside of current statement. */
925 step_command (const char *count_string, int from_tty)
927 step_1 (0, 0, count_string);
930 /* Likewise, but skip over subroutine calls as if single instructions. */
933 next_command (const char *count_string, int from_tty)
935 step_1 (1, 0, count_string);
938 /* Likewise, but step only one instruction. */
941 stepi_command (const char *count_string, int from_tty)
943 step_1 (0, 1, count_string);
947 nexti_command (const char *count_string, int from_tty)
949 step_1 (1, 1, count_string);
953 delete_longjmp_breakpoint_cleanup (void *arg)
955 int thread = * (int *) arg;
956 delete_longjmp_breakpoint (thread);
959 /* Data for the FSM that manages the step/next/stepi/nexti
962 struct step_command_fsm
964 /* The base class. */
965 struct thread_fsm thread_fsm;
967 /* How many steps left in a "step N"-like command. */
970 /* If true, this is a next/nexti, otherwise a step/stepi. */
971 int skip_subroutines;
973 /* If true, this is a stepi/nexti, otherwise a step/step. */
977 static void step_command_fsm_clean_up (struct thread_fsm *self,
978 struct thread_info *thread);
979 static int step_command_fsm_should_stop (struct thread_fsm *self,
980 struct thread_info *thread);
981 static enum async_reply_reason
982 step_command_fsm_async_reply_reason (struct thread_fsm *self);
984 /* step_command_fsm's vtable. */
986 static struct thread_fsm_ops step_command_fsm_ops =
989 step_command_fsm_clean_up,
990 step_command_fsm_should_stop,
991 NULL, /* return_value */
992 step_command_fsm_async_reply_reason,
995 /* Allocate a new step_command_fsm. */
997 static struct step_command_fsm *
998 new_step_command_fsm (struct interp *cmd_interp)
1000 struct step_command_fsm *sm;
1002 sm = XCNEW (struct step_command_fsm);
1003 thread_fsm_ctor (&sm->thread_fsm, &step_command_fsm_ops, cmd_interp);
1008 /* Prepare for a step/next/etc. command. Any target resource
1009 allocated here is undone in the FSM's clean_up method. */
1012 step_command_fsm_prepare (struct step_command_fsm *sm,
1013 int skip_subroutines, int single_inst,
1014 int count, struct thread_info *thread)
1016 sm->skip_subroutines = skip_subroutines;
1017 sm->single_inst = single_inst;
1020 /* Leave the si command alone. */
1021 if (!sm->single_inst || sm->skip_subroutines)
1022 set_longjmp_breakpoint (thread, get_frame_id (get_current_frame ()));
1024 thread->control.stepping_command = 1;
1027 static int prepare_one_step (struct step_command_fsm *sm);
1030 step_1 (int skip_subroutines, int single_inst, const char *count_string)
1034 struct thread_info *thr;
1035 struct step_command_fsm *step_sm;
1038 ensure_not_tfind_mode ();
1039 ensure_valid_thread ();
1040 ensure_not_running ();
1042 gdb::unique_xmalloc_ptr<char> stripped
1043 = strip_bg_char (count_string, &async_exec);
1044 count_string = stripped.get ();
1046 prepare_execution_command (current_top_target (), async_exec);
1048 count = count_string ? parse_and_eval_long (count_string) : 1;
1050 clear_proceed_status (1);
1052 /* Setup the execution command state machine to handle all the COUNT
1054 thr = inferior_thread ();
1055 step_sm = new_step_command_fsm (command_interp ());
1056 thr->thread_fsm = &step_sm->thread_fsm;
1058 step_command_fsm_prepare (step_sm, skip_subroutines,
1059 single_inst, count, thr);
1061 /* Do only one step for now, before returning control to the event
1062 loop. Let the continuation figure out how many other steps we
1063 need to do, and handle them one at the time, through
1065 if (!prepare_one_step (step_sm))
1066 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
1071 /* Stepped into an inline frame. Pretend that we've
1073 thread_fsm_clean_up (thr->thread_fsm, thr);
1074 proceeded = normal_stop ();
1076 inferior_event_handler (INF_EXEC_COMPLETE, NULL);
1077 all_uis_check_sync_execution_done ();
1081 /* Implementation of the 'should_stop' FSM method for stepping
1082 commands. Called after we are done with one step operation, to
1083 check whether we need to step again, before we print the prompt and
1084 return control to the user. If count is > 1, returns false, as we
1085 will need to keep going. */
1088 step_command_fsm_should_stop (struct thread_fsm *self, struct thread_info *tp)
1090 struct step_command_fsm *sm = (struct step_command_fsm *) self;
1092 if (tp->control.stop_step)
1094 /* There are more steps to make, and we did stop due to
1095 ending a stepping range. Do another step. */
1096 if (--sm->count > 0)
1097 return prepare_one_step (sm);
1099 thread_fsm_set_finished (self);
1105 /* Implementation of the 'clean_up' FSM method for stepping commands. */
1108 step_command_fsm_clean_up (struct thread_fsm *self, struct thread_info *thread)
1110 struct step_command_fsm *sm = (struct step_command_fsm *) self;
1112 if (!sm->single_inst || sm->skip_subroutines)
1113 delete_longjmp_breakpoint (thread->global_num);
1116 /* Implementation of the 'async_reply_reason' FSM method for stepping
1119 static enum async_reply_reason
1120 step_command_fsm_async_reply_reason (struct thread_fsm *self)
1122 return EXEC_ASYNC_END_STEPPING_RANGE;
1125 /* Prepare for one step in "step N". The actual target resumption is
1126 done by the caller. Return true if we're done and should thus
1127 report a stop to the user. Returns false if the target needs to be
1131 prepare_one_step (struct step_command_fsm *sm)
1135 struct frame_info *frame = get_current_frame ();
1137 /* Don't assume THREAD is a valid thread id. It is set to -1 if
1138 the longjmp breakpoint was not required. Use the
1139 INFERIOR_PTID thread instead, which is the same thread when
1141 struct thread_info *tp = inferior_thread ();
1145 if (!sm->single_inst)
1149 /* Step at an inlined function behaves like "down". */
1150 if (!sm->skip_subroutines
1151 && inline_skipped_frames (tp))
1155 /* Pretend that we've ran. */
1156 resume_ptid = user_visible_resume_ptid (1);
1157 set_running (resume_ptid, 1);
1159 step_into_inline_frame (tp);
1161 return prepare_one_step (sm);
1164 pc = get_frame_pc (frame);
1165 find_pc_line_pc_range (pc,
1166 &tp->control.step_range_start,
1167 &tp->control.step_range_end);
1169 tp->control.may_range_step = 1;
1171 /* If we have no line info, switch to stepi mode. */
1172 if (tp->control.step_range_end == 0 && step_stop_if_no_debug)
1174 tp->control.step_range_start = tp->control.step_range_end = 1;
1175 tp->control.may_range_step = 0;
1177 else if (tp->control.step_range_end == 0)
1181 if (find_pc_partial_function (pc, &name,
1182 &tp->control.step_range_start,
1183 &tp->control.step_range_end) == 0)
1184 error (_("Cannot find bounds of current function"));
1186 target_terminal::ours_for_output ();
1187 printf_filtered (_("Single stepping until exit from function %s,"
1188 "\nwhich has no line number information.\n"),
1194 /* Say we are stepping, but stop after one insn whatever it does. */
1195 tp->control.step_range_start = tp->control.step_range_end = 1;
1196 if (!sm->skip_subroutines)
1198 Don't step over function calls, not even to functions lacking
1200 tp->control.step_over_calls = STEP_OVER_NONE;
1203 if (sm->skip_subroutines)
1204 tp->control.step_over_calls = STEP_OVER_ALL;
1210 thread_fsm_set_finished (&sm->thread_fsm);
1215 /* Continue program at specified address. */
1218 jump_command (const char *arg, int from_tty)
1220 struct gdbarch *gdbarch = get_current_arch ();
1227 ensure_not_tfind_mode ();
1228 ensure_valid_thread ();
1229 ensure_not_running ();
1231 /* Find out whether we must run in the background. */
1232 gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (arg, &async_exec);
1233 arg = stripped.get ();
1235 prepare_execution_command (current_top_target (), async_exec);
1238 error_no_arg (_("starting address"));
1240 std::vector<symtab_and_line> sals
1241 = decode_line_with_last_displayed (arg, DECODE_LINE_FUNFIRSTLINE);
1242 if (sals.size () != 1)
1243 error (_("Unreasonable jump request"));
1245 symtab_and_line &sal = sals[0];
1247 if (sal.symtab == 0 && sal.pc == 0)
1248 error (_("No source file has been specified."));
1250 resolve_sal_pc (&sal); /* May error out. */
1252 /* See if we are trying to jump to another function. */
1253 fn = get_frame_function (get_current_frame ());
1254 sfn = find_pc_function (sal.pc);
1255 if (fn != NULL && sfn != fn)
1257 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal.line,
1258 SYMBOL_PRINT_NAME (fn)))
1260 error (_("Not confirmed."));
1267 struct obj_section *section;
1269 fixup_symbol_section (sfn, 0);
1270 section = SYMBOL_OBJ_SECTION (symbol_objfile (sfn), sfn);
1271 if (section_is_overlay (section)
1272 && !section_is_mapped (section))
1274 if (!query (_("WARNING!!! Destination is in "
1275 "unmapped overlay! Jump anyway? ")))
1277 error (_("Not confirmed."));
1287 printf_filtered (_("Continuing at "));
1288 fputs_filtered (paddress (gdbarch, addr), gdb_stdout);
1289 printf_filtered (".\n");
1292 clear_proceed_status (0);
1293 proceed (addr, GDB_SIGNAL_0);
1296 /* Continue program giving it specified signal. */
1299 signal_command (const char *signum_exp, int from_tty)
1301 enum gdb_signal oursig;
1304 dont_repeat (); /* Too dangerous. */
1306 ensure_not_tfind_mode ();
1307 ensure_valid_thread ();
1308 ensure_not_running ();
1310 /* Find out whether we must run in the background. */
1311 gdb::unique_xmalloc_ptr<char> stripped
1312 = strip_bg_char (signum_exp, &async_exec);
1313 signum_exp = stripped.get ();
1315 prepare_execution_command (current_top_target (), async_exec);
1318 error_no_arg (_("signal number"));
1320 /* It would be even slicker to make signal names be valid expressions,
1321 (the type could be "enum $signal" or some such), then the user could
1322 assign them to convenience variables. */
1323 oursig = gdb_signal_from_name (signum_exp);
1325 if (oursig == GDB_SIGNAL_UNKNOWN)
1327 /* No, try numeric. */
1328 int num = parse_and_eval_long (signum_exp);
1331 oursig = GDB_SIGNAL_0;
1333 oursig = gdb_signal_from_command (num);
1336 /* Look for threads other than the current that this command ends up
1337 resuming too (due to schedlock off), and warn if they'll get a
1338 signal delivered. "signal 0" is used to suppress a previous
1339 signal, but if the current thread is no longer the one that got
1340 the signal, then the user is potentially suppressing the signal
1341 of the wrong thread. */
1344 struct thread_info *tp;
1346 int must_confirm = 0;
1348 /* This indicates what will be resumed. Either a single thread,
1349 a whole process, or all threads of all processes. */
1350 resume_ptid = user_visible_resume_ptid (0);
1352 ALL_NON_EXITED_THREADS (tp)
1354 if (ptid_equal (tp->ptid, inferior_ptid))
1356 if (!ptid_match (tp->ptid, resume_ptid))
1359 if (tp->suspend.stop_signal != GDB_SIGNAL_0
1360 && signal_pass_state (tp->suspend.stop_signal))
1363 printf_unfiltered (_("Note:\n"));
1364 printf_unfiltered (_(" Thread %s previously stopped with signal %s, %s.\n"),
1365 print_thread_id (tp),
1366 gdb_signal_to_name (tp->suspend.stop_signal),
1367 gdb_signal_to_string (tp->suspend.stop_signal));
1373 && !query (_("Continuing thread %s (the current thread) with specified signal will\n"
1374 "still deliver the signals noted above to their respective threads.\n"
1375 "Continue anyway? "),
1376 print_thread_id (inferior_thread ())))
1377 error (_("Not confirmed."));
1382 if (oursig == GDB_SIGNAL_0)
1383 printf_filtered (_("Continuing with no signal.\n"));
1385 printf_filtered (_("Continuing with signal %s.\n"),
1386 gdb_signal_to_name (oursig));
1389 clear_proceed_status (0);
1390 proceed ((CORE_ADDR) -1, oursig);
1393 /* Queue a signal to be delivered to the current thread. */
1396 queue_signal_command (const char *signum_exp, int from_tty)
1398 enum gdb_signal oursig;
1399 struct thread_info *tp;
1402 ensure_not_tfind_mode ();
1403 ensure_valid_thread ();
1404 ensure_not_running ();
1406 if (signum_exp == NULL)
1407 error_no_arg (_("signal number"));
1409 /* It would be even slicker to make signal names be valid expressions,
1410 (the type could be "enum $signal" or some such), then the user could
1411 assign them to convenience variables. */
1412 oursig = gdb_signal_from_name (signum_exp);
1414 if (oursig == GDB_SIGNAL_UNKNOWN)
1416 /* No, try numeric. */
1417 int num = parse_and_eval_long (signum_exp);
1420 oursig = GDB_SIGNAL_0;
1422 oursig = gdb_signal_from_command (num);
1425 if (oursig != GDB_SIGNAL_0
1426 && !signal_pass_state (oursig))
1427 error (_("Signal handling set to not pass this signal to the program."));
1429 tp = inferior_thread ();
1430 tp->suspend.stop_signal = oursig;
1433 /* Data for the FSM that manages the until (with no argument)
1436 struct until_next_fsm
1438 /* The base class. */
1439 struct thread_fsm thread_fsm;
1441 /* The thread that as current when the command was executed. */
1445 static int until_next_fsm_should_stop (struct thread_fsm *self,
1446 struct thread_info *thread);
1447 static void until_next_fsm_clean_up (struct thread_fsm *self,
1448 struct thread_info *thread);
1449 static enum async_reply_reason
1450 until_next_fsm_async_reply_reason (struct thread_fsm *self);
1452 /* until_next_fsm's vtable. */
1454 static struct thread_fsm_ops until_next_fsm_ops =
1457 until_next_fsm_clean_up,
1458 until_next_fsm_should_stop,
1459 NULL, /* return_value */
1460 until_next_fsm_async_reply_reason,
1463 /* Allocate a new until_next_fsm. */
1465 static struct until_next_fsm *
1466 new_until_next_fsm (struct interp *cmd_interp, int thread)
1468 struct until_next_fsm *sm;
1470 sm = XCNEW (struct until_next_fsm);
1471 thread_fsm_ctor (&sm->thread_fsm, &until_next_fsm_ops, cmd_interp);
1473 sm->thread = thread;
1478 /* Implementation of the 'should_stop' FSM method for the until (with
1482 until_next_fsm_should_stop (struct thread_fsm *self,
1483 struct thread_info *tp)
1485 if (tp->control.stop_step)
1486 thread_fsm_set_finished (self);
1491 /* Implementation of the 'clean_up' FSM method for the until (with no
1495 until_next_fsm_clean_up (struct thread_fsm *self, struct thread_info *thread)
1497 delete_longjmp_breakpoint (thread->global_num);
1500 /* Implementation of the 'async_reply_reason' FSM method for the until
1501 (with no arg) command. */
1503 static enum async_reply_reason
1504 until_next_fsm_async_reply_reason (struct thread_fsm *self)
1506 return EXEC_ASYNC_END_STEPPING_RANGE;
1509 /* Proceed until we reach a different source line with pc greater than
1510 our current one or exit the function. We skip calls in both cases.
1512 Note that eventually this command should probably be changed so
1513 that only source lines are printed out when we hit the breakpoint
1514 we set. This may involve changes to wait_for_inferior and the
1515 proceed status code. */
1518 until_next_command (int from_tty)
1520 struct frame_info *frame;
1522 struct symbol *func;
1523 struct symtab_and_line sal;
1524 struct thread_info *tp = inferior_thread ();
1525 int thread = tp->global_num;
1526 struct cleanup *old_chain;
1527 struct until_next_fsm *sm;
1529 clear_proceed_status (0);
1532 frame = get_current_frame ();
1534 /* Step until either exited from this function or greater
1535 than the current line (if in symbolic section) or pc (if
1538 pc = get_frame_pc (frame);
1539 func = find_pc_function (pc);
1543 struct bound_minimal_symbol msymbol = lookup_minimal_symbol_by_pc (pc);
1545 if (msymbol.minsym == NULL)
1546 error (_("Execution is not within a known function."));
1548 tp->control.step_range_start = BMSYMBOL_VALUE_ADDRESS (msymbol);
1549 /* The upper-bound of step_range is exclusive. In order to make PC
1550 within the range, set the step_range_end with PC + 1. */
1551 tp->control.step_range_end = pc + 1;
1555 sal = find_pc_line (pc, 0);
1557 tp->control.step_range_start = BLOCK_START (SYMBOL_BLOCK_VALUE (func));
1558 tp->control.step_range_end = sal.end;
1560 tp->control.may_range_step = 1;
1562 tp->control.step_over_calls = STEP_OVER_ALL;
1564 set_longjmp_breakpoint (tp, get_frame_id (frame));
1565 old_chain = make_cleanup (delete_longjmp_breakpoint_cleanup, &thread);
1567 sm = new_until_next_fsm (command_interp (), tp->global_num);
1568 tp->thread_fsm = &sm->thread_fsm;
1569 discard_cleanups (old_chain);
1571 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
1575 until_command (const char *arg, int from_tty)
1580 ensure_not_tfind_mode ();
1581 ensure_valid_thread ();
1582 ensure_not_running ();
1584 /* Find out whether we must run in the background. */
1585 gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (arg, &async_exec);
1586 arg = stripped.get ();
1588 prepare_execution_command (current_top_target (), async_exec);
1591 until_break_command (arg, from_tty, 0);
1593 until_next_command (from_tty);
1597 advance_command (const char *arg, int from_tty)
1602 ensure_not_tfind_mode ();
1603 ensure_valid_thread ();
1604 ensure_not_running ();
1607 error_no_arg (_("a location"));
1609 /* Find out whether we must run in the background. */
1610 gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (arg, &async_exec);
1611 arg = stripped.get ();
1613 prepare_execution_command (current_top_target (), async_exec);
1615 until_break_command (arg, from_tty, 1);
1618 /* Return the value of the result of a function at the end of a 'finish'
1619 command/BP. DTOR_DATA (if not NULL) can represent inferior registers
1620 right after an inferior call has finished. */
1623 get_return_value (struct value *function, struct type *value_type)
1625 regcache *stop_regs = get_current_regcache ();
1626 struct gdbarch *gdbarch = stop_regs->arch ();
1627 struct value *value;
1629 value_type = check_typedef (value_type);
1630 gdb_assert (TYPE_CODE (value_type) != TYPE_CODE_VOID);
1632 /* FIXME: 2003-09-27: When returning from a nested inferior function
1633 call, it's possible (with no help from the architecture vector)
1634 to locate and return/print a "struct return" value. This is just
1635 a more complicated case of what is already being done in the
1636 inferior function call code. In fact, when inferior function
1637 calls are made async, this will likely be made the norm. */
1639 switch (gdbarch_return_value (gdbarch, function, value_type,
1642 case RETURN_VALUE_REGISTER_CONVENTION:
1643 case RETURN_VALUE_ABI_RETURNS_ADDRESS:
1644 case RETURN_VALUE_ABI_PRESERVES_ADDRESS:
1645 value = allocate_value (value_type);
1646 gdbarch_return_value (gdbarch, function, value_type, stop_regs,
1647 value_contents_raw (value), NULL);
1649 case RETURN_VALUE_STRUCT_CONVENTION:
1653 internal_error (__FILE__, __LINE__, _("bad switch"));
1659 /* The captured function return value/type and its position in the
1662 struct return_value_info
1664 /* The captured return value. May be NULL if we weren't able to
1665 retrieve it. See get_return_value. */
1666 struct value *value;
1668 /* The return type. In some cases, we'll not be able extract the
1669 return value, but we always know the type. */
1672 /* If we captured a value, this is the value history index. */
1673 int value_history_index;
1676 /* Helper for print_return_value. */
1679 print_return_value_1 (struct ui_out *uiout, struct return_value_info *rv)
1681 if (rv->value != NULL)
1683 struct value_print_options opts;
1686 uiout->text ("Value returned is ");
1687 uiout->field_fmt ("gdb-result-var", "$%d",
1688 rv->value_history_index);
1689 uiout->text (" = ");
1690 get_user_print_options (&opts);
1694 value_print (rv->value, &stb, &opts);
1695 uiout->field_stream ("return-value", stb);
1700 std::string type_name = type_to_string (rv->type);
1701 uiout->text ("Value returned has type: ");
1702 uiout->field_string ("return-type", type_name.c_str ());
1704 uiout->text (" Cannot determine contents\n");
1708 /* Print the result of a function at the end of a 'finish' command.
1709 RV points at an object representing the captured return value/type
1710 and its position in the value history. */
1713 print_return_value (struct ui_out *uiout, struct return_value_info *rv)
1715 if (rv->type == NULL || TYPE_CODE (rv->type) == TYPE_CODE_VOID)
1720 /* print_return_value_1 can throw an exception in some
1721 circumstances. We need to catch this so that we still
1722 delete the breakpoint. */
1723 print_return_value_1 (uiout, rv);
1725 CATCH (ex, RETURN_MASK_ALL)
1727 exception_print (gdb_stdout, ex);
1732 /* Data for the FSM that manages the finish command. */
1734 struct finish_command_fsm
1736 /* The base class. */
1737 struct thread_fsm thread_fsm;
1739 /* The momentary breakpoint set at the function's return address in
1741 struct breakpoint *breakpoint;
1743 /* The function that we're stepping out of. */
1744 struct symbol *function;
1746 /* If the FSM finishes successfully, this stores the function's
1748 struct return_value_info return_value;
1751 static int finish_command_fsm_should_stop (struct thread_fsm *self,
1752 struct thread_info *thread);
1753 static void finish_command_fsm_clean_up (struct thread_fsm *self,
1754 struct thread_info *thread);
1755 static struct return_value_info *
1756 finish_command_fsm_return_value (struct thread_fsm *self);
1757 static enum async_reply_reason
1758 finish_command_fsm_async_reply_reason (struct thread_fsm *self);
1760 /* finish_command_fsm's vtable. */
1762 static struct thread_fsm_ops finish_command_fsm_ops =
1765 finish_command_fsm_clean_up,
1766 finish_command_fsm_should_stop,
1767 finish_command_fsm_return_value,
1768 finish_command_fsm_async_reply_reason,
1769 NULL, /* should_notify_stop */
1772 /* Allocate a new finish_command_fsm. */
1774 static struct finish_command_fsm *
1775 new_finish_command_fsm (struct interp *cmd_interp)
1777 struct finish_command_fsm *sm;
1779 sm = XCNEW (struct finish_command_fsm);
1780 thread_fsm_ctor (&sm->thread_fsm, &finish_command_fsm_ops, cmd_interp);
1785 /* Implementation of the 'should_stop' FSM method for the finish
1786 commands. Detects whether the thread stepped out of the function
1787 successfully, and if so, captures the function's return value and
1788 marks the FSM finished. */
1791 finish_command_fsm_should_stop (struct thread_fsm *self,
1792 struct thread_info *tp)
1794 struct finish_command_fsm *f = (struct finish_command_fsm *) self;
1795 struct return_value_info *rv = &f->return_value;
1797 if (f->function != NULL
1798 && bpstat_find_breakpoint (tp->control.stop_bpstat,
1799 f->breakpoint) != NULL)
1802 thread_fsm_set_finished (self);
1804 rv->type = TYPE_TARGET_TYPE (SYMBOL_TYPE (f->function));
1805 if (rv->type == NULL)
1806 internal_error (__FILE__, __LINE__,
1807 _("finish_command: function has no target type"));
1809 if (TYPE_CODE (rv->type) != TYPE_CODE_VOID)
1813 func = read_var_value (f->function, NULL, get_current_frame ());
1814 rv->value = get_return_value (func, rv->type);
1815 if (rv->value != NULL)
1816 rv->value_history_index = record_latest_value (rv->value);
1819 else if (tp->control.stop_step)
1821 /* Finishing from an inline frame, or reverse finishing. In
1822 either case, there's no way to retrieve the return value. */
1823 thread_fsm_set_finished (self);
1829 /* Implementation of the 'clean_up' FSM method for the finish
1833 finish_command_fsm_clean_up (struct thread_fsm *self,
1834 struct thread_info *thread)
1836 struct finish_command_fsm *f = (struct finish_command_fsm *) self;
1838 if (f->breakpoint != NULL)
1840 delete_breakpoint (f->breakpoint);
1841 f->breakpoint = NULL;
1843 delete_longjmp_breakpoint (thread->global_num);
1846 /* Implementation of the 'return_value' FSM method for the finish
1849 static struct return_value_info *
1850 finish_command_fsm_return_value (struct thread_fsm *self)
1852 struct finish_command_fsm *f = (struct finish_command_fsm *) self;
1854 return &f->return_value;
1857 /* Implementation of the 'async_reply_reason' FSM method for the
1860 static enum async_reply_reason
1861 finish_command_fsm_async_reply_reason (struct thread_fsm *self)
1863 if (execution_direction == EXEC_REVERSE)
1864 return EXEC_ASYNC_END_STEPPING_RANGE;
1866 return EXEC_ASYNC_FUNCTION_FINISHED;
1869 /* finish_backward -- helper function for finish_command. */
1872 finish_backward (struct finish_command_fsm *sm)
1874 struct symtab_and_line sal;
1875 struct thread_info *tp = inferior_thread ();
1877 CORE_ADDR func_addr;
1879 pc = get_frame_pc (get_current_frame ());
1881 if (find_pc_partial_function (pc, NULL, &func_addr, NULL) == 0)
1882 error (_("Cannot find bounds of current function"));
1884 sal = find_pc_line (func_addr, 0);
1886 tp->control.proceed_to_finish = 1;
1887 /* Special case: if we're sitting at the function entry point,
1888 then all we need to do is take a reverse singlestep. We
1889 don't need to set a breakpoint, and indeed it would do us
1892 Note that this can only happen at frame #0, since there's
1893 no way that a function up the stack can have a return address
1894 that's equal to its entry point. */
1898 struct frame_info *frame = get_selected_frame (NULL);
1899 struct gdbarch *gdbarch = get_frame_arch (frame);
1901 /* Set a step-resume at the function's entry point. Once that's
1902 hit, we'll do one more step backwards. */
1903 symtab_and_line sr_sal;
1905 sr_sal.pspace = get_frame_program_space (frame);
1906 insert_step_resume_breakpoint_at_sal (gdbarch,
1907 sr_sal, null_frame_id);
1909 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
1913 /* We're almost there -- we just need to back up by one more
1915 tp->control.step_range_start = tp->control.step_range_end = 1;
1916 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
1920 /* finish_forward -- helper function for finish_command. FRAME is the
1921 frame that called the function we're about to step out of. */
1924 finish_forward (struct finish_command_fsm *sm, struct frame_info *frame)
1926 struct frame_id frame_id = get_frame_id (frame);
1927 struct gdbarch *gdbarch = get_frame_arch (frame);
1928 struct symtab_and_line sal;
1929 struct thread_info *tp = inferior_thread ();
1931 sal = find_pc_line (get_frame_pc (frame), 0);
1932 sal.pc = get_frame_pc (frame);
1934 sm->breakpoint = set_momentary_breakpoint (gdbarch, sal,
1935 get_stack_frame_id (frame),
1936 bp_finish).release ();
1938 /* set_momentary_breakpoint invalidates FRAME. */
1941 set_longjmp_breakpoint (tp, frame_id);
1943 /* We want to print return value, please... */
1944 tp->control.proceed_to_finish = 1;
1946 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
1949 /* Skip frames for "finish". */
1951 static struct frame_info *
1952 skip_finish_frames (struct frame_info *frame)
1954 struct frame_info *start;
1960 frame = skip_tailcall_frames (frame);
1964 frame = skip_unwritable_frames (frame);
1968 while (start != frame);
1973 /* "finish": Set a temporary breakpoint at the place the selected
1974 frame will return to, then continue. */
1977 finish_command (const char *arg, int from_tty)
1979 struct frame_info *frame;
1981 struct finish_command_fsm *sm;
1982 struct thread_info *tp;
1985 ensure_not_tfind_mode ();
1986 ensure_valid_thread ();
1987 ensure_not_running ();
1989 /* Find out whether we must run in the background. */
1990 gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (arg, &async_exec);
1991 arg = stripped.get ();
1993 prepare_execution_command (current_top_target (), async_exec);
1996 error (_("The \"finish\" command does not take any arguments."));
1998 frame = get_prev_frame (get_selected_frame (_("No selected frame.")));
2000 error (_("\"finish\" not meaningful in the outermost frame."));
2002 clear_proceed_status (0);
2004 tp = inferior_thread ();
2006 sm = new_finish_command_fsm (command_interp ());
2008 tp->thread_fsm = &sm->thread_fsm;
2010 /* Finishing from an inline frame is completely different. We don't
2011 try to show the "return value" - no way to locate it. */
2012 if (get_frame_type (get_selected_frame (_("No selected frame.")))
2015 /* Claim we are stepping in the calling frame. An empty step
2016 range means that we will stop once we aren't in a function
2017 called by that frame. We don't use the magic "1" value for
2018 step_range_end, because then infrun will think this is nexti,
2019 and not step over the rest of this inlined function call. */
2020 set_step_info (frame, {});
2021 tp->control.step_range_start = get_frame_pc (frame);
2022 tp->control.step_range_end = tp->control.step_range_start;
2023 tp->control.step_over_calls = STEP_OVER_ALL;
2025 /* Print info on the selected frame, including level number but not
2029 printf_filtered (_("Run till exit from "));
2030 print_stack_frame (get_selected_frame (NULL), 1, LOCATION, 0);
2033 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
2037 /* Find the function we will return from. */
2039 sm->function = find_pc_function (get_frame_pc (get_selected_frame (NULL)));
2041 /* Print info on the selected frame, including level number but not
2045 if (execution_direction == EXEC_REVERSE)
2046 printf_filtered (_("Run back to call of "));
2049 if (sm->function != NULL && TYPE_NO_RETURN (sm->function->type)
2050 && !query (_("warning: Function %s does not return normally.\n"
2051 "Try to finish anyway? "),
2052 SYMBOL_PRINT_NAME (sm->function)))
2053 error (_("Not confirmed."));
2054 printf_filtered (_("Run till exit from "));
2057 print_stack_frame (get_selected_frame (NULL), 1, LOCATION, 0);
2060 if (execution_direction == EXEC_REVERSE)
2061 finish_backward (sm);
2064 frame = skip_finish_frames (frame);
2067 error (_("Cannot find the caller frame."));
2069 finish_forward (sm, frame);
2075 info_program_command (const char *args, int from_tty)
2081 if (!target_has_execution)
2083 printf_filtered (_("The program being debugged is not being run.\n"));
2088 ptid = inferior_ptid;
2091 struct target_waitstatus ws;
2093 get_last_target_status (&ptid, &ws);
2096 if (ptid == null_ptid)
2097 error (_("No selected thread."));
2099 thread_info *tp = find_thread_ptid (ptid);
2101 if (tp->state == THREAD_EXITED)
2102 error (_("Invalid selected thread."));
2103 else if (tp->state == THREAD_RUNNING)
2104 error (_("Selected thread is running."));
2106 bs = tp->control.stop_bpstat;
2107 stat = bpstat_num (&bs, &num);
2109 target_files_info ();
2110 printf_filtered (_("Program stopped at %s.\n"),
2111 paddress (target_gdbarch (), stop_pc));
2112 if (tp->control.stop_step)
2113 printf_filtered (_("It stopped after being stepped.\n"));
2116 /* There may be several breakpoints in the same place, so this
2117 isn't as strange as it seems. */
2122 printf_filtered (_("It stopped at a breakpoint "
2123 "that has since been deleted.\n"));
2126 printf_filtered (_("It stopped at breakpoint %d.\n"), num);
2127 stat = bpstat_num (&bs, &num);
2130 else if (tp->suspend.stop_signal != GDB_SIGNAL_0)
2132 printf_filtered (_("It stopped with signal %s, %s.\n"),
2133 gdb_signal_to_name (tp->suspend.stop_signal),
2134 gdb_signal_to_string (tp->suspend.stop_signal));
2139 printf_filtered (_("Type \"info stack\" or \"info "
2140 "registers\" for more information.\n"));
2145 environment_info (const char *var, int from_tty)
2149 const char *val = current_inferior ()->environment.get (var);
2153 puts_filtered (var);
2154 puts_filtered (" = ");
2155 puts_filtered (val);
2156 puts_filtered ("\n");
2160 puts_filtered ("Environment variable \"");
2161 puts_filtered (var);
2162 puts_filtered ("\" not defined.\n");
2167 char **envp = current_inferior ()->environment.envp ();
2169 for (int idx = 0; envp[idx] != NULL; ++idx)
2171 puts_filtered (envp[idx]);
2172 puts_filtered ("\n");
2178 set_environment_command (const char *arg, int from_tty)
2180 const char *p, *val;
2184 error_no_arg (_("environment variable and value"));
2186 /* Find seperation between variable name and value. */
2187 p = (char *) strchr (arg, '=');
2188 val = (char *) strchr (arg, ' ');
2190 if (p != 0 && val != 0)
2192 /* We have both a space and an equals. If the space is before the
2193 equals, walk forward over the spaces til we see a nonspace
2194 (possibly the equals). */
2199 /* Now if the = is after the char following the spaces,
2200 take the char following the spaces. */
2204 else if (val != 0 && p == 0)
2208 error_no_arg (_("environment variable to set"));
2210 if (p == 0 || p[1] == 0)
2214 p = arg + strlen (arg); /* So that savestring below will work. */
2218 /* Not setting variable value to null. */
2220 while (*val == ' ' || *val == '\t')
2224 while (p != arg && (p[-1] == ' ' || p[-1] == '\t'))
2227 std::string var (arg, p - arg);
2230 printf_filtered (_("Setting environment variable "
2231 "\"%s\" to null value.\n"),
2233 current_inferior ()->environment.set (var.c_str (), "");
2236 current_inferior ()->environment.set (var.c_str (), val);
2240 unset_environment_command (const char *var, int from_tty)
2244 /* If there is no argument, delete all environment variables.
2245 Ask for confirmation if reading from the terminal. */
2246 if (!from_tty || query (_("Delete all environment variables? ")))
2247 current_inferior ()->environment.clear ();
2250 current_inferior ()->environment.unset (var);
2253 /* Handle the execution path (PATH variable). */
2255 static const char path_var_name[] = "PATH";
2258 path_info (const char *args, int from_tty)
2260 puts_filtered ("Executable and object file path: ");
2261 puts_filtered (current_inferior ()->environment.get (path_var_name));
2262 puts_filtered ("\n");
2265 /* Add zero or more directories to the front of the execution path. */
2268 path_command (const char *dirname, int from_tty)
2274 env = current_inferior ()->environment.get (path_var_name);
2275 /* Can be null if path is not set. */
2278 exec_path = xstrdup (env);
2279 mod_path (dirname, &exec_path);
2280 current_inferior ()->environment.set (path_var_name, exec_path);
2283 path_info ((char *) NULL, from_tty);
2288 pad_to_column (string_file &stream, int col)
2290 /* At least one space must be printed to separate columns. */
2292 const int size = stream.size ();
2294 stream.puts (n_spaces (col - size));
2297 /* Print out the register NAME with value VAL, to FILE, in the default
2301 default_print_one_register_info (struct ui_file *file,
2305 struct type *regtype = value_type (val);
2306 int print_raw_format;
2307 string_file format_stream;
2310 value_column_1 = 15,
2311 /* Give enough room for "0x", 16 hex digits and two spaces in
2312 preceding column. */
2313 value_column_2 = value_column_1 + 2 + 16 + 2,
2316 format_stream.puts (name);
2317 pad_to_column (format_stream, value_column_1);
2319 print_raw_format = (value_entirely_available (val)
2320 && !value_optimized_out (val));
2322 /* If virtual format is floating, print it that way, and in raw
2324 if (TYPE_CODE (regtype) == TYPE_CODE_FLT
2325 || TYPE_CODE (regtype) == TYPE_CODE_DECFLOAT)
2327 struct value_print_options opts;
2328 const gdb_byte *valaddr = value_contents_for_printing (val);
2329 enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (regtype));
2331 get_user_print_options (&opts);
2335 value_embedded_offset (val), 0,
2336 &format_stream, 0, val, &opts, current_language);
2338 if (print_raw_format)
2340 pad_to_column (format_stream, value_column_2);
2341 format_stream.puts ("(raw ");
2342 print_hex_chars (&format_stream, valaddr, TYPE_LENGTH (regtype),
2344 format_stream.putc (')');
2349 struct value_print_options opts;
2351 /* Print the register in hex. */
2352 get_formatted_print_options (&opts, 'x');
2355 value_embedded_offset (val), 0,
2356 &format_stream, 0, val, &opts, current_language);
2357 /* If not a vector register, print it also according to its
2359 if (print_raw_format && TYPE_VECTOR (regtype) == 0)
2361 pad_to_column (format_stream, value_column_2);
2362 get_user_print_options (&opts);
2365 value_embedded_offset (val), 0,
2366 &format_stream, 0, val, &opts, current_language);
2370 fputs_filtered (format_stream.c_str (), file);
2371 fprintf_filtered (file, "\n");
2374 /* Print out the machine register regnum. If regnum is -1, print all
2375 registers (print_all == 1) or all non-float and non-vector
2376 registers (print_all == 0).
2378 For most machines, having all_registers_info() print the
2379 register(s) one per line is good enough. If a different format is
2380 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2381 regs), or there is an existing convention for showing all the
2382 registers, define the architecture method PRINT_REGISTERS_INFO to
2383 provide that format. */
2386 default_print_registers_info (struct gdbarch *gdbarch,
2387 struct ui_file *file,
2388 struct frame_info *frame,
2389 int regnum, int print_all)
2392 const int numregs = gdbarch_num_regs (gdbarch)
2393 + gdbarch_num_pseudo_regs (gdbarch);
2395 for (i = 0; i < numregs; i++)
2397 /* Decide between printing all regs, non-float / vector regs, or
2403 if (!gdbarch_register_reggroup_p (gdbarch, i, all_reggroup))
2408 if (!gdbarch_register_reggroup_p (gdbarch, i, general_reggroup))
2418 /* If the register name is empty, it is undefined for this
2419 processor, so don't display anything. */
2420 if (gdbarch_register_name (gdbarch, i) == NULL
2421 || *(gdbarch_register_name (gdbarch, i)) == '\0')
2424 default_print_one_register_info (file,
2425 gdbarch_register_name (gdbarch, i),
2426 value_of_register (i, frame));
2431 registers_info (const char *addr_exp, int fpregs)
2433 struct frame_info *frame;
2434 struct gdbarch *gdbarch;
2436 if (!target_has_registers)
2437 error (_("The program has no registers now."));
2438 frame = get_selected_frame (NULL);
2439 gdbarch = get_frame_arch (frame);
2443 gdbarch_print_registers_info (gdbarch, gdb_stdout,
2448 while (*addr_exp != '\0')
2453 /* Skip leading white space. */
2454 addr_exp = skip_spaces (addr_exp);
2456 /* Discard any leading ``$''. Check that there is something
2457 resembling a register following it. */
2458 if (addr_exp[0] == '$')
2460 if (isspace ((*addr_exp)) || (*addr_exp) == '\0')
2461 error (_("Missing register name"));
2463 /* Find the start/end of this register name/num/group. */
2465 while ((*addr_exp) != '\0' && !isspace ((*addr_exp)))
2469 /* Figure out what we've found and display it. */
2471 /* A register name? */
2473 int regnum = user_reg_map_name_to_regnum (gdbarch, start, end - start);
2477 /* User registers lie completely outside of the range of
2478 normal registers. Catch them early so that the target
2480 if (regnum >= gdbarch_num_regs (gdbarch)
2481 + gdbarch_num_pseudo_regs (gdbarch))
2483 struct value *regval = value_of_user_reg (regnum, frame);
2484 const char *regname = user_reg_map_regnum_to_name (gdbarch,
2487 /* Print in the same fashion
2488 gdbarch_print_registers_info's default
2489 implementation prints. */
2490 default_print_one_register_info (gdb_stdout,
2495 gdbarch_print_registers_info (gdbarch, gdb_stdout,
2496 frame, regnum, fpregs);
2501 /* A register group? */
2503 struct reggroup *group;
2505 for (group = reggroup_next (gdbarch, NULL);
2507 group = reggroup_next (gdbarch, group))
2509 /* Don't bother with a length check. Should the user
2510 enter a short register group name, go with the first
2511 group that matches. */
2512 if (strncmp (start, reggroup_name (group), end - start) == 0)
2520 regnum < gdbarch_num_regs (gdbarch)
2521 + gdbarch_num_pseudo_regs (gdbarch);
2524 if (gdbarch_register_reggroup_p (gdbarch, regnum, group))
2525 gdbarch_print_registers_info (gdbarch,
2533 /* Nothing matched. */
2534 error (_("Invalid register `%.*s'"), (int) (end - start), start);
2539 info_all_registers_command (const char *addr_exp, int from_tty)
2541 registers_info (addr_exp, 1);
2545 info_registers_command (const char *addr_exp, int from_tty)
2547 registers_info (addr_exp, 0);
2551 print_vector_info (struct ui_file *file,
2552 struct frame_info *frame, const char *args)
2554 struct gdbarch *gdbarch = get_frame_arch (frame);
2556 if (gdbarch_print_vector_info_p (gdbarch))
2557 gdbarch_print_vector_info (gdbarch, file, frame, args);
2561 int printed_something = 0;
2564 regnum < gdbarch_num_regs (gdbarch)
2565 + gdbarch_num_pseudo_regs (gdbarch);
2568 if (gdbarch_register_reggroup_p (gdbarch, regnum, vector_reggroup))
2570 printed_something = 1;
2571 gdbarch_print_registers_info (gdbarch, file, frame, regnum, 1);
2574 if (!printed_something)
2575 fprintf_filtered (file, "No vector information\n");
2580 info_vector_command (const char *args, int from_tty)
2582 if (!target_has_registers)
2583 error (_("The program has no registers now."));
2585 print_vector_info (gdb_stdout, get_selected_frame (NULL), args);
2588 /* Kill the inferior process. Make us have no inferior. */
2591 kill_command (const char *arg, int from_tty)
2593 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2594 It should be a distinct flag that indicates that a target is active, cuz
2595 some targets don't have processes! */
2597 if (ptid_equal (inferior_ptid, null_ptid))
2598 error (_("The program is not being run."));
2599 if (!query (_("Kill the program being debugged? ")))
2600 error (_("Not confirmed."));
2602 int pid = current_inferior ()->pid;
2603 /* Save the pid as a string before killing the inferior, since that
2604 may unpush the current target, and we need the string after. */
2605 std::string pid_str = target_pid_to_str (pid_to_ptid (pid));
2606 int infnum = current_inferior ()->num;
2610 if (print_inferior_events)
2611 printf_unfiltered (_("[Inferior %d (%s) killed]\n"),
2612 infnum, pid_str.c_str ());
2614 /* If we still have other inferiors to debug, then don't mess with
2615 with their threads. */
2616 if (!have_inferiors ())
2618 init_thread_list (); /* Destroy thread info. */
2620 /* Killing off the inferior can leave us with a core file. If
2621 so, print the state we are left in. */
2622 if (target_has_stack)
2624 printf_filtered (_("In %s,\n"), target_longname);
2625 print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
2628 bfd_cache_close_all ();
2631 /* Used in `attach&' command. ARG is a point to an integer
2632 representing a process id. Proceed threads of this process iff
2633 they stopped due to debugger request, and when they did, they
2634 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads
2635 that have been explicitly been told to stop. */
2638 proceed_after_attach_callback (struct thread_info *thread,
2641 int pid = * (int *) arg;
2643 if (ptid_get_pid (thread->ptid) == pid
2644 && thread->state != THREAD_EXITED
2645 && !thread->executing
2646 && !thread->stop_requested
2647 && thread->suspend.stop_signal == GDB_SIGNAL_0)
2649 switch_to_thread (thread);
2650 clear_proceed_status (0);
2651 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
2658 proceed_after_attach (int pid)
2660 /* Don't error out if the current thread is running, because
2661 there may be other stopped threads. */
2663 /* Backup current thread and selected frame. */
2664 scoped_restore_current_thread restore_thread;
2666 iterate_over_threads (proceed_after_attach_callback, &pid);
2669 /* See inferior.h. */
2672 setup_inferior (int from_tty)
2674 struct inferior *inferior;
2676 inferior = current_inferior ();
2677 inferior->needs_setup = 0;
2679 /* If no exec file is yet known, try to determine it from the
2681 if (get_exec_file (0) == NULL)
2682 exec_file_locate_attach (ptid_get_pid (inferior_ptid), 1, from_tty);
2685 reopen_exec_file ();
2689 /* Take any necessary post-attaching actions for this platform. */
2690 target_post_attach (ptid_get_pid (inferior_ptid));
2692 post_create_inferior (current_top_target (), from_tty);
2695 /* What to do after the first program stops after attaching. */
2696 enum attach_post_wait_mode
2698 /* Do nothing. Leaves threads as they are. */
2699 ATTACH_POST_WAIT_NOTHING,
2701 /* Re-resume threads that are marked running. */
2702 ATTACH_POST_WAIT_RESUME,
2704 /* Stop all threads. */
2705 ATTACH_POST_WAIT_STOP,
2708 /* Called after we've attached to a process and we've seen it stop for
2709 the first time. If ASYNC_EXEC is true, re-resume threads that
2710 should be running. Else if ATTACH, */
2713 attach_post_wait (const char *args, int from_tty, enum attach_post_wait_mode mode)
2715 struct inferior *inferior;
2717 inferior = current_inferior ();
2718 inferior->control.stop_soon = NO_STOP_QUIETLY;
2720 if (inferior->needs_setup)
2721 setup_inferior (from_tty);
2723 if (mode == ATTACH_POST_WAIT_RESUME)
2725 /* The user requested an `attach&', so be sure to leave threads
2726 that didn't get a signal running. */
2728 /* Immediatelly resume all suspended threads of this inferior,
2729 and this inferior only. This should have no effect on
2730 already running threads. If a thread has been stopped with a
2731 signal, leave it be. */
2733 proceed_after_attach (inferior->pid);
2736 if (inferior_thread ()->suspend.stop_signal == GDB_SIGNAL_0)
2738 clear_proceed_status (0);
2739 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT);
2743 else if (mode == ATTACH_POST_WAIT_STOP)
2745 /* The user requested a plain `attach', so be sure to leave
2746 the inferior stopped. */
2748 /* At least the current thread is already stopped. */
2750 /* In all-stop, by definition, all threads have to be already
2751 stopped at this point. In non-stop, however, although the
2752 selected thread is stopped, others may still be executing.
2753 Be sure to explicitly stop all threads of the process. This
2754 should have no effect on already stopped threads. */
2756 target_stop (pid_to_ptid (inferior->pid));
2757 else if (target_is_non_stop_p ())
2759 struct thread_info *thread;
2760 struct thread_info *lowest = inferior_thread ();
2761 int pid = current_inferior ()->pid;
2763 stop_all_threads ();
2765 /* It's not defined which thread will report the attach
2766 stop. For consistency, always select the thread with
2767 lowest GDB number, which should be the main thread, if it
2769 ALL_NON_EXITED_THREADS (thread)
2771 if (ptid_get_pid (thread->ptid) == pid)
2773 if (thread->inf->num < lowest->inf->num
2774 || thread->per_inf_num < lowest->per_inf_num)
2779 switch_to_thread (lowest);
2782 /* Tell the user/frontend where we're stopped. */
2784 if (deprecated_attach_hook)
2785 deprecated_attach_hook ();
2789 struct attach_command_continuation_args
2793 enum attach_post_wait_mode mode;
2797 attach_command_continuation (void *args, int err)
2799 struct attach_command_continuation_args *a
2800 = (struct attach_command_continuation_args *) args;
2805 attach_post_wait (a->args, a->from_tty, a->mode);
2809 attach_command_continuation_free_args (void *args)
2811 struct attach_command_continuation_args *a
2812 = (struct attach_command_continuation_args *) args;
2818 /* "attach" command entry point. Takes a program started up outside
2819 of gdb and ``attaches'' to it. This stops it cold in its tracks
2820 and allows us to start debugging it. */
2823 attach_command (const char *args, int from_tty)
2826 struct target_ops *attach_target;
2827 struct inferior *inferior = current_inferior ();
2828 enum attach_post_wait_mode mode;
2830 dont_repeat (); /* Not for the faint of heart */
2832 if (gdbarch_has_global_solist (target_gdbarch ()))
2833 /* Don't complain if all processes share the same symbol
2836 else if (target_has_execution)
2838 if (query (_("A program is being debugged already. Kill it? ")))
2841 error (_("Not killed."));
2844 /* Clean up any leftovers from other runs. Some other things from
2845 this function should probably be moved into target_pre_inferior. */
2846 target_pre_inferior (from_tty);
2848 gdb::unique_xmalloc_ptr<char> stripped = strip_bg_char (args, &async_exec);
2849 args = stripped.get ();
2851 attach_target = find_attach_target ();
2853 prepare_execution_command (attach_target, async_exec);
2855 if (non_stop && !attach_target->supports_non_stop ())
2856 error (_("Cannot attach to this target in non-stop mode"));
2858 attach_target->attach (args, from_tty);
2859 /* to_attach should push the target, so after this point we
2860 shouldn't refer to attach_target again. */
2861 attach_target = NULL;
2863 /* Set up the "saved terminal modes" of the inferior
2864 based on what modes we are starting it with. */
2865 target_terminal::init ();
2867 /* Install inferior's terminal modes. This may look like a no-op,
2868 as we've just saved them above, however, this does more than
2869 restore terminal settings:
2871 - installs a SIGINT handler that forwards SIGINT to the inferior.
2872 Otherwise a Ctrl-C pressed just while waiting for the initial
2873 stop would end up as a spurious Quit.
2875 - removes stdin from the event loop, which we need if attaching
2876 in the foreground, otherwise on targets that report an initial
2877 stop on attach (which are most) we'd process input/commands
2878 while we're in the event loop waiting for that stop. That is,
2879 before the attach continuation runs and the command is really
2881 target_terminal::inferior ();
2883 /* Set up execution context to know that we should return from
2884 wait_for_inferior as soon as the target reports a stop. */
2885 init_wait_for_inferior ();
2886 clear_proceed_status (0);
2888 inferior->needs_setup = 1;
2890 if (target_is_non_stop_p ())
2892 /* If we find that the current thread isn't stopped, explicitly
2893 do so now, because we're going to install breakpoints and
2897 /* The user requested an `attach&'; stop just one thread. */
2898 target_stop (inferior_ptid);
2900 /* The user requested an `attach', so stop all threads of this
2902 target_stop (pid_to_ptid (ptid_get_pid (inferior_ptid)));
2905 mode = async_exec ? ATTACH_POST_WAIT_RESUME : ATTACH_POST_WAIT_STOP;
2907 /* Some system don't generate traps when attaching to inferior.
2908 E.g. Mach 3 or GNU hurd. */
2909 if (!target_attach_no_wait ())
2911 struct attach_command_continuation_args *a;
2913 /* Careful here. See comments in inferior.h. Basically some
2914 OSes don't ignore SIGSTOPs on continue requests anymore. We
2915 need a way for handle_inferior_event to reset the stop_signal
2916 variable after an attach, and this is what
2917 STOP_QUIETLY_NO_SIGSTOP is for. */
2918 inferior->control.stop_soon = STOP_QUIETLY_NO_SIGSTOP;
2920 /* Wait for stop. */
2921 a = XNEW (struct attach_command_continuation_args);
2922 a->args = xstrdup (args);
2923 a->from_tty = from_tty;
2925 add_inferior_continuation (attach_command_continuation, a,
2926 attach_command_continuation_free_args);
2928 if (!target_is_async_p ())
2929 mark_infrun_async_event_handler ();
2933 attach_post_wait (args, from_tty, mode);
2936 /* We had just found out that the target was already attached to an
2937 inferior. PTID points at a thread of this new inferior, that is
2938 the most likely to be stopped right now, but not necessarily so.
2939 The new inferior is assumed to be already added to the inferior
2940 list at this point. If LEAVE_RUNNING, then leave the threads of
2941 this inferior running, except those we've explicitly seen reported
2945 notice_new_inferior (thread_info *thr, int leave_running, int from_tty)
2947 enum attach_post_wait_mode mode
2948 = leave_running ? ATTACH_POST_WAIT_RESUME : ATTACH_POST_WAIT_NOTHING;
2950 gdb::optional<scoped_restore_current_thread> restore_thread;
2952 if (inferior_ptid != null_ptid)
2953 restore_thread.emplace ();
2955 /* Avoid reading registers -- we haven't fetched the target
2957 switch_to_thread_no_regs (thr);
2959 /* When we "notice" a new inferior we need to do all the things we
2960 would normally do if we had just attached to it. */
2964 struct attach_command_continuation_args *a;
2965 struct inferior *inferior = current_inferior ();
2967 /* We're going to install breakpoints, and poke at memory,
2968 ensure that the inferior is stopped for a moment while we do
2970 target_stop (inferior_ptid);
2972 inferior->control.stop_soon = STOP_QUIETLY_REMOTE;
2974 /* Wait for stop before proceeding. */
2975 a = XNEW (struct attach_command_continuation_args);
2976 a->args = xstrdup ("");
2977 a->from_tty = from_tty;
2979 add_inferior_continuation (attach_command_continuation, a,
2980 attach_command_continuation_free_args);
2985 attach_post_wait ("" /* args */, from_tty, mode);
2990 * takes a program previously attached to and detaches it.
2991 * The program resumes execution and will no longer stop
2992 * on signals, etc. We better not have left any breakpoints
2993 * in the program or it'll die when it hits one. For this
2994 * to work, it may be necessary for the process to have been
2995 * previously attached. It *might* work if the program was
2996 * started via the normal ptrace (PTRACE_TRACEME).
3000 detach_command (const char *args, int from_tty)
3002 dont_repeat (); /* Not for the faint of heart. */
3004 if (ptid_equal (inferior_ptid, null_ptid))
3005 error (_("The program is not being run."));
3007 query_if_trace_running (from_tty);
3009 disconnect_tracing ();
3011 target_detach (current_inferior (), from_tty);
3013 /* The current inferior process was just detached successfully. Get
3014 rid of breakpoints that no longer make sense. Note we don't do
3015 this within target_detach because that is also used when
3016 following child forks, and in that case we will want to transfer
3017 breakpoints to the child, not delete them. */
3018 breakpoint_init_inferior (inf_exited);
3020 /* If the solist is global across inferiors, don't clear it when we
3021 detach from a single inferior. */
3022 if (!gdbarch_has_global_solist (target_gdbarch ()))
3023 no_shared_libraries (NULL, from_tty);
3025 /* If we still have inferiors to debug, then don't mess with their
3027 if (!have_inferiors ())
3028 init_thread_list ();
3030 if (deprecated_detach_hook)
3031 deprecated_detach_hook ();
3034 /* Disconnect from the current target without resuming it (leaving it
3035 waiting for a debugger).
3037 We'd better not have left any breakpoints in the program or the
3038 next debugger will get confused. Currently only supported for some
3039 remote targets, since the normal attach mechanisms don't work on
3040 stopped processes on some native platforms (e.g. GNU/Linux). */
3043 disconnect_command (const char *args, int from_tty)
3045 dont_repeat (); /* Not for the faint of heart. */
3046 query_if_trace_running (from_tty);
3047 disconnect_tracing ();
3048 target_disconnect (args, from_tty);
3049 no_shared_libraries (NULL, from_tty);
3050 init_thread_list ();
3051 if (deprecated_detach_hook)
3052 deprecated_detach_hook ();
3056 interrupt_target_1 (int all_threads)
3061 ptid = minus_one_ptid;
3063 ptid = inferior_ptid;
3068 target_interrupt ();
3070 /* Tag the thread as having been explicitly requested to stop, so
3071 other parts of gdb know not to resume this thread automatically,
3072 if it was stopped due to an internal event. Limit this to
3073 non-stop mode, as when debugging a multi-threaded application in
3074 all-stop mode, we will only get one stop event --- it's undefined
3075 which thread will report the event. */
3077 set_stop_requested (ptid, 1);
3081 Stop the execution of the target while running in async mode, in
3082 the background. In all-stop, stop the whole process. In non-stop
3083 mode, stop the current thread only by default, or stop all threads
3084 if the `-a' switch is used. */
3087 interrupt_command (const char *args, int from_tty)
3089 if (target_can_async_p ())
3091 int all_threads = 0;
3093 dont_repeat (); /* Not for the faint of heart. */
3096 && startswith (args, "-a"))
3099 if (!non_stop && all_threads)
3100 error (_("-a is meaningless in all-stop mode."));
3102 interrupt_target_1 (all_threads);
3106 /* See inferior.h. */
3109 default_print_float_info (struct gdbarch *gdbarch, struct ui_file *file,
3110 struct frame_info *frame, const char *args)
3113 int printed_something = 0;
3116 regnum < gdbarch_num_regs (gdbarch)
3117 + gdbarch_num_pseudo_regs (gdbarch);
3120 if (gdbarch_register_reggroup_p (gdbarch, regnum, float_reggroup))
3122 printed_something = 1;
3123 gdbarch_print_registers_info (gdbarch, file, frame, regnum, 1);
3126 if (!printed_something)
3127 fprintf_filtered (file, "No floating-point info "
3128 "available for this processor.\n");
3132 info_float_command (const char *args, int from_tty)
3134 struct frame_info *frame;
3136 if (!target_has_registers)
3137 error (_("The program has no registers now."));
3139 frame = get_selected_frame (NULL);
3140 gdbarch_print_float_info (get_frame_arch (frame), gdb_stdout, frame, args);
3144 unset_command (const char *args, int from_tty)
3146 printf_filtered (_("\"unset\" must be followed by the "
3147 "name of an unset subcommand.\n"));
3148 help_list (unsetlist, "unset ", all_commands, gdb_stdout);
3151 /* Implement `info proc' family of commands. */
3154 info_proc_cmd_1 (const char *args, enum info_proc_what what, int from_tty)
3156 struct gdbarch *gdbarch = get_current_arch ();
3158 if (!target_info_proc (args, what))
3160 if (gdbarch_info_proc_p (gdbarch))
3161 gdbarch_info_proc (gdbarch, args, what);
3163 error (_("Not supported on this target."));
3167 /* Implement `info proc' when given without any futher parameters. */
3170 info_proc_cmd (const char *args, int from_tty)
3172 info_proc_cmd_1 (args, IP_MINIMAL, from_tty);
3175 /* Implement `info proc mappings'. */
3178 info_proc_cmd_mappings (const char *args, int from_tty)
3180 info_proc_cmd_1 (args, IP_MAPPINGS, from_tty);
3183 /* Implement `info proc stat'. */
3186 info_proc_cmd_stat (const char *args, int from_tty)
3188 info_proc_cmd_1 (args, IP_STAT, from_tty);
3191 /* Implement `info proc status'. */
3194 info_proc_cmd_status (const char *args, int from_tty)
3196 info_proc_cmd_1 (args, IP_STATUS, from_tty);
3199 /* Implement `info proc cwd'. */
3202 info_proc_cmd_cwd (const char *args, int from_tty)
3204 info_proc_cmd_1 (args, IP_CWD, from_tty);
3207 /* Implement `info proc cmdline'. */
3210 info_proc_cmd_cmdline (const char *args, int from_tty)
3212 info_proc_cmd_1 (args, IP_CMDLINE, from_tty);
3215 /* Implement `info proc exe'. */
3218 info_proc_cmd_exe (const char *args, int from_tty)
3220 info_proc_cmd_1 (args, IP_EXE, from_tty);
3223 /* Implement `info proc all'. */
3226 info_proc_cmd_all (const char *args, int from_tty)
3228 info_proc_cmd_1 (args, IP_ALL, from_tty);
3231 /* This help string is used for the run, start, and starti commands.
3232 It is defined as a macro to prevent duplication. */
3234 #define RUN_ARGS_HELP \
3235 "You may specify arguments to give it.\n\
3236 Args may include \"*\", or \"[...]\"; they are expanded using the\n\
3237 shell that will start the program (specified by the \"$SHELL\" environment\n\
3238 variable). Input and output redirection with \">\", \"<\", or \">>\"\n\
3239 are also allowed.\n\
3241 With no arguments, uses arguments last specified (with \"run\" or \n\
3242 \"set args\"). To cancel previous arguments and run with no arguments,\n\
3243 use \"set args\" without arguments.\n\
3245 To start the inferior without using a shell, use \"set startup-with-shell off\"."
3248 _initialize_infcmd (void)
3250 static struct cmd_list_element *info_proc_cmdlist;
3251 struct cmd_list_element *c = NULL;
3252 const char *cmd_name;
3254 /* Add the filename of the terminal connected to inferior I/O. */
3255 add_setshow_optional_filename_cmd ("inferior-tty", class_run,
3256 &inferior_io_terminal_scratch, _("\
3257 Set terminal for future runs of program being debugged."), _("\
3258 Show terminal for future runs of program being debugged."), _("\
3259 Usage: set inferior-tty [TTY]\n\n\
3260 If TTY is omitted, the default behavior of using the same terminal as GDB\n\
3262 set_inferior_tty_command,
3263 show_inferior_tty_command,
3264 &setlist, &showlist);
3265 cmd_name = "inferior-tty";
3266 c = lookup_cmd (&cmd_name, setlist, "", -1, 1);
3267 gdb_assert (c != NULL);
3268 add_alias_cmd ("tty", c, class_alias, 0, &cmdlist);
3271 add_setshow_string_noescape_cmd (cmd_name, class_run,
3272 &inferior_args_scratch, _("\
3273 Set argument list to give program being debugged when it is started."), _("\
3274 Show argument list to give program being debugged when it is started."), _("\
3275 Follow this command with any number of args, to be passed to the program."),
3278 &setlist, &showlist);
3279 c = lookup_cmd (&cmd_name, setlist, "", -1, 1);
3280 gdb_assert (c != NULL);
3281 set_cmd_completer (c, filename_completer);
3284 add_setshow_string_noescape_cmd (cmd_name, class_run,
3285 &inferior_cwd_scratch, _("\
3286 Set the current working directory to be used when the inferior is started.\n\
3287 Changing this setting does not have any effect on inferiors that are\n\
3290 Show the current working directory that is used when the inferior is started."),
3292 Use this command to change the current working directory that will be used\n\
3293 when the inferior is started. This setting does not affect GDB's current\n\
3294 working directory."),
3297 &setlist, &showlist);
3298 c = lookup_cmd (&cmd_name, setlist, "", -1, 1);
3299 gdb_assert (c != NULL);
3300 set_cmd_completer (c, filename_completer);
3302 c = add_cmd ("environment", no_class, environment_info, _("\
3303 The environment to give the program, or one variable's value.\n\
3304 With an argument VAR, prints the value of environment variable VAR to\n\
3305 give the program being debugged. With no arguments, prints the entire\n\
3306 environment to be given to the program."), &showlist);
3307 set_cmd_completer (c, noop_completer);
3309 add_prefix_cmd ("unset", no_class, unset_command,
3310 _("Complement to certain \"set\" commands."),
3311 &unsetlist, "unset ", 0, &cmdlist);
3313 c = add_cmd ("environment", class_run, unset_environment_command, _("\
3314 Cancel environment variable VAR for the program.\n\
3315 This does not affect the program until the next \"run\" command."),
3317 set_cmd_completer (c, noop_completer);
3319 c = add_cmd ("environment", class_run, set_environment_command, _("\
3320 Set environment variable value to give the program.\n\
3321 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3322 VALUES of environment variables are uninterpreted strings.\n\
3323 This does not affect the program until the next \"run\" command."),
3325 set_cmd_completer (c, noop_completer);
3327 c = add_com ("path", class_files, path_command, _("\
3328 Add directory DIR(s) to beginning of search path for object files.\n\
3329 $cwd in the path means the current working directory.\n\
3330 This path is equivalent to the $PATH shell variable. It is a list of\n\
3331 directories, separated by colons. These directories are searched to find\n\
3332 fully linked executable files and separately compiled object files as \
3334 set_cmd_completer (c, filename_completer);
3336 c = add_cmd ("paths", no_class, path_info, _("\
3337 Current search path for finding object files.\n\
3338 $cwd in the path means the current working directory.\n\
3339 This path is equivalent to the $PATH shell variable. It is a list of\n\
3340 directories, separated by colons. These directories are searched to find\n\
3341 fully linked executable files and separately compiled object files as \
3344 set_cmd_completer (c, noop_completer);
3346 add_prefix_cmd ("kill", class_run, kill_command,
3347 _("Kill execution of program being debugged."),
3348 &killlist, "kill ", 0, &cmdlist);
3350 add_com ("attach", class_run, attach_command, _("\
3351 Attach to a process or file outside of GDB.\n\
3352 This command attaches to another target, of the same type as your last\n\
3353 \"target\" command (\"info files\" will show your target stack).\n\
3354 The command may take as argument a process id or a device file.\n\
3355 For a process id, you must have permission to send the process a signal,\n\
3356 and it must have the same effective uid as the debugger.\n\
3357 When using \"attach\" with a process id, the debugger finds the\n\
3358 program running in the process, looking first in the current working\n\
3359 directory, or (if not found there) using the source file search path\n\
3360 (see the \"directory\" command). You can also use the \"file\" command\n\
3361 to specify the program, and to load its symbol table."));
3363 add_prefix_cmd ("detach", class_run, detach_command, _("\
3364 Detach a process or file previously attached.\n\
3365 If a process, it is no longer traced, and it continues its execution. If\n\
3366 you were debugging a file, the file is closed and gdb no longer accesses it."),
3367 &detachlist, "detach ", 0, &cmdlist);
3369 add_com ("disconnect", class_run, disconnect_command, _("\
3370 Disconnect from a target.\n\
3371 The target will wait for another debugger to connect. Not available for\n\
3374 c = add_com ("signal", class_run, signal_command, _("\
3375 Continue program with the specified signal.\n\
3376 Usage: signal SIGNAL\n\
3377 The SIGNAL argument is processed the same as the handle command.\n\
3379 An argument of \"0\" means continue the program without sending it a signal.\n\
3380 This is useful in cases where the program stopped because of a signal,\n\
3381 and you want to resume the program while discarding the signal.\n\
3383 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3384 the current thread only."));
3385 set_cmd_completer (c, signal_completer);
3387 c = add_com ("queue-signal", class_run, queue_signal_command, _("\
3388 Queue a signal to be delivered to the current thread when it is resumed.\n\
3389 Usage: queue-signal SIGNAL\n\
3390 The SIGNAL argument is processed the same as the handle command.\n\
3391 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3393 An argument of \"0\" means remove any currently queued signal from\n\
3394 the current thread. This is useful in cases where the program stopped\n\
3395 because of a signal, and you want to resume it while discarding the signal.\n\
3397 In a multi-threaded program the signal is queued with, or discarded from,\n\
3398 the current thread only."));
3399 set_cmd_completer (c, signal_completer);
3401 add_com ("stepi", class_run, stepi_command, _("\
3402 Step one instruction exactly.\n\
3404 Argument N means step N times (or till program stops for another \
3406 add_com_alias ("si", "stepi", class_alias, 0);
3408 add_com ("nexti", class_run, nexti_command, _("\
3409 Step one instruction, but proceed through subroutine calls.\n\
3411 Argument N means step N times (or till program stops for another \
3413 add_com_alias ("ni", "nexti", class_alias, 0);
3415 add_com ("finish", class_run, finish_command, _("\
3416 Execute until selected stack frame returns.\n\
3418 Upon return, the value returned is printed and put in the value history."));
3419 add_com_alias ("fin", "finish", class_run, 1);
3421 add_com ("next", class_run, next_command, _("\
3422 Step program, proceeding through subroutine calls.\n\
3424 Unlike \"step\", if the current source line calls a subroutine,\n\
3425 this command does not enter the subroutine, but instead steps over\n\
3426 the call, in effect treating it as a single source line."));
3427 add_com_alias ("n", "next", class_run, 1);
3429 add_com ("step", class_run, step_command, _("\
3430 Step program until it reaches a different source line.\n\
3432 Argument N means step N times (or till program stops for another \
3434 add_com_alias ("s", "step", class_run, 1);
3436 c = add_com ("until", class_run, until_command, _("\
3437 Execute until the program reaches a source line greater than the current\n\
3438 or a specified location (same args as break command) within the current \
3440 set_cmd_completer (c, location_completer);
3441 add_com_alias ("u", "until", class_run, 1);
3443 c = add_com ("advance", class_run, advance_command, _("\
3444 Continue the program up to the given location (same form as args for break \
3446 Execution will also stop upon exit from the current stack frame."));
3447 set_cmd_completer (c, location_completer);
3449 c = add_com ("jump", class_run, jump_command, _("\
3450 Continue program being debugged at specified line or address.\n\
3451 Usage: jump LOCATION\n\
3452 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3453 for an address to start at."));
3454 set_cmd_completer (c, location_completer);
3455 add_com_alias ("j", "jump", class_run, 1);
3457 add_com ("continue", class_run, continue_command, _("\
3458 Continue program being debugged, after signal or breakpoint.\n\
3459 Usage: continue [N]\n\
3460 If proceeding from breakpoint, a number N may be used as an argument,\n\
3461 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3462 the breakpoint won't break until the Nth time it is reached).\n\
3464 If non-stop mode is enabled, continue only the current thread,\n\
3465 otherwise all the threads in the program are continued. To \n\
3466 continue all stopped threads in non-stop mode, use the -a option.\n\
3467 Specifying -a and an ignore count simultaneously is an error."));
3468 add_com_alias ("c", "cont", class_run, 1);
3469 add_com_alias ("fg", "cont", class_run, 1);
3471 c = add_com ("run", class_run, run_command, _("\
3472 Start debugged program.\n"
3474 set_cmd_completer (c, filename_completer);
3475 add_com_alias ("r", "run", class_run, 1);
3477 c = add_com ("start", class_run, start_command, _("\
3478 Start the debugged program stopping at the beginning of the main procedure.\n"
3480 set_cmd_completer (c, filename_completer);
3482 c = add_com ("starti", class_run, starti_command, _("\
3483 Start the debugged program stopping at the first instruction.\n"
3485 set_cmd_completer (c, filename_completer);
3487 add_com ("interrupt", class_run, interrupt_command,
3488 _("Interrupt the execution of the debugged program.\n\
3489 If non-stop mode is enabled, interrupt only the current thread,\n\
3490 otherwise all the threads in the program are stopped. To \n\
3491 interrupt all running threads in non-stop mode, use the -a option."));
3493 c = add_info ("registers", info_registers_command, _("\
3494 List of integer registers and their contents, for selected stack frame.\n\
3495 One or more register names as argument means describe the given registers.\n\
3496 One or more register group names as argument means describe the registers\n\
3497 in the named register groups."));
3498 add_info_alias ("r", "registers", 1);
3499 set_cmd_completer (c, reg_or_group_completer);
3501 c = add_info ("all-registers", info_all_registers_command, _("\
3502 List of all registers and their contents, for selected stack frame.\n\
3503 One or more register names as argument means describe the given registers.\n\
3504 One or more register group names as argument means describe the registers\n\
3505 in the named register groups."));
3506 set_cmd_completer (c, reg_or_group_completer);
3508 add_info ("program", info_program_command,
3509 _("Execution status of the program."));
3511 add_info ("float", info_float_command,
3512 _("Print the status of the floating point unit\n"));
3514 add_info ("vector", info_vector_command,
3515 _("Print the status of the vector unit\n"));
3517 add_prefix_cmd ("proc", class_info, info_proc_cmd,
3519 Show /proc process information about any running process.\n\
3520 Specify any process id, or use the program being debugged by default."),
3521 &info_proc_cmdlist, "info proc ",
3522 1/*allow-unknown*/, &infolist);
3524 add_cmd ("mappings", class_info, info_proc_cmd_mappings, _("\
3525 List of mapped memory regions."),
3526 &info_proc_cmdlist);
3528 add_cmd ("stat", class_info, info_proc_cmd_stat, _("\
3529 List process info from /proc/PID/stat."),
3530 &info_proc_cmdlist);
3532 add_cmd ("status", class_info, info_proc_cmd_status, _("\
3533 List process info from /proc/PID/status."),
3534 &info_proc_cmdlist);
3536 add_cmd ("cwd", class_info, info_proc_cmd_cwd, _("\
3537 List current working directory of the process."),
3538 &info_proc_cmdlist);
3540 add_cmd ("cmdline", class_info, info_proc_cmd_cmdline, _("\
3541 List command line arguments of the process."),
3542 &info_proc_cmdlist);
3544 add_cmd ("exe", class_info, info_proc_cmd_exe, _("\
3545 List absolute filename for executable of the process."),
3546 &info_proc_cmdlist);
3548 add_cmd ("all", class_info, info_proc_cmd_all, _("\
3549 List all available /proc info."),
3550 &info_proc_cmdlist);