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[deliverable/binutils-gdb.git] / gdb / infcmd.c
1 /* Memory-access and commands for "inferior" process, for GDB.
2
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 2008 Free Software Foundation, Inc.
6
7 This file is part of GDB.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21
22 #include "defs.h"
23 #include <signal.h>
24 #include "gdb_string.h"
25 #include "symtab.h"
26 #include "gdbtypes.h"
27 #include "frame.h"
28 #include "inferior.h"
29 #include "environ.h"
30 #include "value.h"
31 #include "gdbcmd.h"
32 #include "symfile.h"
33 #include "gdbcore.h"
34 #include "target.h"
35 #include "language.h"
36 #include "symfile.h"
37 #include "objfiles.h"
38 #include "completer.h"
39 #include "ui-out.h"
40 #include "event-top.h"
41 #include "parser-defs.h"
42 #include "regcache.h"
43 #include "reggroups.h"
44 #include "block.h"
45 #include "solib.h"
46 #include <ctype.h>
47 #include "gdb_assert.h"
48 #include "observer.h"
49 #include "target-descriptions.h"
50 #include "user-regs.h"
51 #include "exceptions.h"
52 #include "cli/cli-decode.h"
53 #include "gdbthread.h"
54 #include "valprint.h"
55
56 /* Functions exported for general use, in inferior.h: */
57
58 void all_registers_info (char *, int);
59
60 void registers_info (char *, int);
61
62 void nexti_command (char *, int);
63
64 void stepi_command (char *, int);
65
66 void continue_command (char *, int);
67
68 void interrupt_target_command (char *args, int from_tty);
69
70 /* Local functions: */
71
72 static void nofp_registers_info (char *, int);
73
74 static void print_return_value (struct type *func_type,
75 struct type *value_type);
76
77 static void until_next_command (int);
78
79 static void until_command (char *, int);
80
81 static void path_info (char *, int);
82
83 static void path_command (char *, int);
84
85 static void unset_command (char *, int);
86
87 static void float_info (char *, int);
88
89 static void disconnect_command (char *, int);
90
91 static void unset_environment_command (char *, int);
92
93 static void set_environment_command (char *, int);
94
95 static void environment_info (char *, int);
96
97 static void program_info (char *, int);
98
99 static void finish_command (char *, int);
100
101 static void signal_command (char *, int);
102
103 static void jump_command (char *, int);
104
105 static void step_1 (int, int, char *);
106 static void step_once (int skip_subroutines, int single_inst, int count, int thread);
107
108 static void next_command (char *, int);
109
110 static void step_command (char *, int);
111
112 static void run_command (char *, int);
113
114 static void run_no_args_command (char *args, int from_tty);
115
116 static void go_command (char *line_no, int from_tty);
117
118 static int strip_bg_char (char **);
119
120 void _initialize_infcmd (void);
121
122 #define ERROR_NO_INFERIOR \
123 if (!target_has_execution) error (_("The program is not being run."));
124
125 /* String containing arguments to give to the program, separated by spaces.
126 Empty string (pointer to '\0') means no args. */
127
128 static char *inferior_args;
129
130 /* The inferior arguments as a vector. If INFERIOR_ARGC is nonzero,
131 then we must compute INFERIOR_ARGS from this (via the target). */
132
133 static int inferior_argc;
134 static char **inferior_argv;
135
136 /* File name for default use for standard in/out in the inferior. */
137
138 static char *inferior_io_terminal;
139
140 /* Pid of our debugged inferior, or 0 if no inferior now.
141 Since various parts of infrun.c test this to see whether there is a program
142 being debugged it should be nonzero (currently 3 is used) for remote
143 debugging. */
144
145 ptid_t inferior_ptid;
146
147 /* Address at which inferior stopped. */
148
149 CORE_ADDR stop_pc;
150
151 /* Flag indicating that a command has proceeded the inferior past the
152 current breakpoint. */
153
154 int breakpoint_proceeded;
155
156 /* Nonzero if stopped due to completion of a stack dummy routine. */
157
158 int stop_stack_dummy;
159
160 /* Nonzero if stopped due to a random (unexpected) signal in inferior
161 process. */
162
163 int stopped_by_random_signal;
164
165 /* Environment to use for running inferior,
166 in format described in environ.h. */
167
168 struct gdb_environ *inferior_environ;
169
170 /* When set, no calls to target_resumed observer will be made. */
171 int suppress_resume_observer = 0;
172 /* When set, normal_stop will not call the normal_stop observer. */
173 int suppress_stop_observer = 0;
174 \f
175 /* Accessor routines. */
176
177 void
178 set_inferior_io_terminal (const char *terminal_name)
179 {
180 if (inferior_io_terminal)
181 xfree (inferior_io_terminal);
182
183 if (!terminal_name)
184 inferior_io_terminal = NULL;
185 else
186 inferior_io_terminal = savestring (terminal_name, strlen (terminal_name));
187 }
188
189 const char *
190 get_inferior_io_terminal (void)
191 {
192 return inferior_io_terminal;
193 }
194
195 char *
196 get_inferior_args (void)
197 {
198 if (inferior_argc != 0)
199 {
200 char *n, *old;
201
202 n = gdbarch_construct_inferior_arguments (current_gdbarch,
203 inferior_argc, inferior_argv);
204 old = set_inferior_args (n);
205 xfree (old);
206 }
207
208 if (inferior_args == NULL)
209 inferior_args = xstrdup ("");
210
211 return inferior_args;
212 }
213
214 char *
215 set_inferior_args (char *newargs)
216 {
217 char *saved_args = inferior_args;
218
219 inferior_args = newargs;
220 inferior_argc = 0;
221 inferior_argv = 0;
222
223 return saved_args;
224 }
225
226 void
227 set_inferior_args_vector (int argc, char **argv)
228 {
229 inferior_argc = argc;
230 inferior_argv = argv;
231 }
232
233 /* Notice when `set args' is run. */
234 static void
235 notice_args_set (char *args, int from_tty, struct cmd_list_element *c)
236 {
237 inferior_argc = 0;
238 inferior_argv = 0;
239 }
240
241 /* Notice when `show args' is run. */
242 static void
243 notice_args_read (struct ui_file *file, int from_tty,
244 struct cmd_list_element *c, const char *value)
245 {
246 /* Note that we ignore the passed-in value in favor of computing it
247 directly. */
248 deprecated_show_value_hack (file, from_tty, c, get_inferior_args ());
249 }
250
251 \f
252 /* Compute command-line string given argument vector. This does the
253 same shell processing as fork_inferior. */
254 char *
255 construct_inferior_arguments (struct gdbarch *gdbarch, int argc, char **argv)
256 {
257 char *result;
258
259 if (STARTUP_WITH_SHELL)
260 {
261 /* This holds all the characters considered special to the
262 typical Unix shells. We include `^' because the SunOS
263 /bin/sh treats it as a synonym for `|'. */
264 char *special = "\"!#$&*()\\|[]{}<>?'\"`~^; \t\n";
265 int i;
266 int length = 0;
267 char *out, *cp;
268
269 /* We over-compute the size. It shouldn't matter. */
270 for (i = 0; i < argc; ++i)
271 length += 3 * strlen (argv[i]) + 1 + 2 * (argv[i][0] == '\0');
272
273 result = (char *) xmalloc (length);
274 out = result;
275
276 for (i = 0; i < argc; ++i)
277 {
278 if (i > 0)
279 *out++ = ' ';
280
281 /* Need to handle empty arguments specially. */
282 if (argv[i][0] == '\0')
283 {
284 *out++ = '\'';
285 *out++ = '\'';
286 }
287 else
288 {
289 for (cp = argv[i]; *cp; ++cp)
290 {
291 if (*cp == '\n')
292 {
293 /* A newline cannot be quoted with a backslash (it
294 just disappears), only by putting it inside
295 quotes. */
296 *out++ = '\'';
297 *out++ = '\n';
298 *out++ = '\'';
299 }
300 else
301 {
302 if (strchr (special, *cp) != NULL)
303 *out++ = '\\';
304 *out++ = *cp;
305 }
306 }
307 }
308 }
309 *out = '\0';
310 }
311 else
312 {
313 /* In this case we can't handle arguments that contain spaces,
314 tabs, or newlines -- see breakup_args(). */
315 int i;
316 int length = 0;
317
318 for (i = 0; i < argc; ++i)
319 {
320 char *cp = strchr (argv[i], ' ');
321 if (cp == NULL)
322 cp = strchr (argv[i], '\t');
323 if (cp == NULL)
324 cp = strchr (argv[i], '\n');
325 if (cp != NULL)
326 error (_("can't handle command-line argument containing whitespace"));
327 length += strlen (argv[i]) + 1;
328 }
329
330 result = (char *) xmalloc (length);
331 result[0] = '\0';
332 for (i = 0; i < argc; ++i)
333 {
334 if (i > 0)
335 strcat (result, " ");
336 strcat (result, argv[i]);
337 }
338 }
339
340 return result;
341 }
342 \f
343
344 /* This function detects whether or not a '&' character (indicating
345 background execution) has been added as *the last* of the arguments ARGS
346 of a command. If it has, it removes it and returns 1. Otherwise it
347 does nothing and returns 0. */
348 static int
349 strip_bg_char (char **args)
350 {
351 char *p = NULL;
352
353 p = strchr (*args, '&');
354
355 if (p)
356 {
357 if (p == (*args + strlen (*args) - 1))
358 {
359 if (strlen (*args) > 1)
360 {
361 do
362 p--;
363 while (*p == ' ' || *p == '\t');
364 *(p + 1) = '\0';
365 }
366 else
367 *args = 0;
368 return 1;
369 }
370 }
371 return 0;
372 }
373
374 void
375 tty_command (char *file, int from_tty)
376 {
377 if (file == 0)
378 error_no_arg (_("terminal name for running target process"));
379
380 set_inferior_io_terminal (file);
381 }
382
383 /* Common actions to take after creating any sort of inferior, by any
384 means (running, attaching, connecting, et cetera). The target
385 should be stopped. */
386
387 void
388 post_create_inferior (struct target_ops *target, int from_tty)
389 {
390 /* Be sure we own the terminal in case write operations are performed. */
391 target_terminal_ours ();
392
393 /* If the target hasn't taken care of this already, do it now.
394 Targets which need to access registers during to_open,
395 to_create_inferior, or to_attach should do it earlier; but many
396 don't need to. */
397 target_find_description ();
398
399 /* If the solist is global across processes, there's no need to
400 refetch it here. */
401 if (exec_bfd && !gdbarch_has_global_solist (target_gdbarch))
402 {
403 /* Sometimes the platform-specific hook loads initial shared
404 libraries, and sometimes it doesn't. Try to do so first, so
405 that we can add them with the correct value for FROM_TTY.
406 If we made all the inferior hook methods consistent,
407 this call could be removed. */
408 #ifdef SOLIB_ADD
409 SOLIB_ADD (NULL, from_tty, target, auto_solib_add);
410 #else
411 solib_add (NULL, from_tty, target, auto_solib_add);
412 #endif
413 }
414
415 if (exec_bfd)
416 {
417 /* Create the hooks to handle shared library load and unload
418 events. */
419 #ifdef SOLIB_CREATE_INFERIOR_HOOK
420 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid));
421 #else
422 solib_create_inferior_hook ();
423 #endif
424 }
425
426 observer_notify_inferior_created (target, from_tty);
427 }
428
429 /* Kill the inferior if already running. This function is designed
430 to be called when we are about to start the execution of the program
431 from the beginning. Ask the user to confirm that he wants to restart
432 the program being debugged when FROM_TTY is non-null. */
433
434 static void
435 kill_if_already_running (int from_tty)
436 {
437 if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution)
438 {
439 /* Bail out before killing the program if we will not be able to
440 restart it. */
441 target_require_runnable ();
442
443 if (from_tty
444 && !query ("The program being debugged has been started already.\n\
445 Start it from the beginning? "))
446 error (_("Program not restarted."));
447 target_kill ();
448 }
449 }
450
451 /* Implement the "run" command. If TBREAK_AT_MAIN is set, then insert
452 a temporary breakpoint at the begining of the main program before
453 running the program. */
454
455 static void
456 run_command_1 (char *args, int from_tty, int tbreak_at_main)
457 {
458 char *exec_file;
459
460 dont_repeat ();
461
462 kill_if_already_running (from_tty);
463
464 init_wait_for_inferior ();
465 clear_breakpoint_hit_counts ();
466
467 /* Clean up any leftovers from other runs. Some other things from
468 this function should probably be moved into target_pre_inferior. */
469 target_pre_inferior (from_tty);
470
471 /* The comment here used to read, "The exec file is re-read every
472 time we do a generic_mourn_inferior, so we just have to worry
473 about the symbol file." The `generic_mourn_inferior' function
474 gets called whenever the program exits. However, suppose the
475 program exits, and *then* the executable file changes? We need
476 to check again here. Since reopen_exec_file doesn't do anything
477 if the timestamp hasn't changed, I don't see the harm. */
478 reopen_exec_file ();
479 reread_symbols ();
480
481 /* Insert the temporary breakpoint if a location was specified. */
482 if (tbreak_at_main)
483 tbreak_command (main_name (), 0);
484
485 exec_file = (char *) get_exec_file (0);
486
487 if (non_stop && !target_supports_non_stop ())
488 error (_("The target does not support running in non-stop mode."));
489
490 /* We keep symbols from add-symbol-file, on the grounds that the
491 user might want to add some symbols before running the program
492 (right?). But sometimes (dynamic loading where the user manually
493 introduces the new symbols with add-symbol-file), the code which
494 the symbols describe does not persist between runs. Currently
495 the user has to manually nuke all symbols between runs if they
496 want them to go away (PR 2207). This is probably reasonable. */
497
498 if (!args)
499 {
500 if (target_can_async_p ())
501 async_disable_stdin ();
502 }
503 else
504 {
505 int async_exec = strip_bg_char (&args);
506
507 /* If we get a request for running in the bg but the target
508 doesn't support it, error out. */
509 if (async_exec && !target_can_async_p ())
510 error (_("Asynchronous execution not supported on this target."));
511
512 /* If we don't get a request of running in the bg, then we need
513 to simulate synchronous (fg) execution. */
514 if (!async_exec && target_can_async_p ())
515 {
516 /* Simulate synchronous execution */
517 async_disable_stdin ();
518 }
519
520 /* If there were other args, beside '&', process them. */
521 if (args)
522 {
523 char *old_args = set_inferior_args (xstrdup (args));
524 xfree (old_args);
525 }
526 }
527
528 if (from_tty)
529 {
530 ui_out_field_string (uiout, NULL, "Starting program");
531 ui_out_text (uiout, ": ");
532 if (exec_file)
533 ui_out_field_string (uiout, "execfile", exec_file);
534 ui_out_spaces (uiout, 1);
535 /* We call get_inferior_args() because we might need to compute
536 the value now. */
537 ui_out_field_string (uiout, "infargs", get_inferior_args ());
538 ui_out_text (uiout, "\n");
539 ui_out_flush (uiout);
540 }
541
542 /* We call get_inferior_args() because we might need to compute
543 the value now. */
544 target_create_inferior (exec_file, get_inferior_args (),
545 environ_vector (inferior_environ), from_tty);
546
547 /* Pass zero for FROM_TTY, because at this point the "run" command
548 has done its thing; now we are setting up the running program. */
549 post_create_inferior (&current_target, 0);
550
551 /* Start the target running. */
552 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
553 }
554
555
556 static void
557 run_command (char *args, int from_tty)
558 {
559 run_command_1 (args, from_tty, 0);
560 }
561
562 static void
563 run_no_args_command (char *args, int from_tty)
564 {
565 char *old_args = set_inferior_args (xstrdup (""));
566 xfree (old_args);
567 }
568 \f
569
570 /* Start the execution of the program up until the beginning of the main
571 program. */
572
573 static void
574 start_command (char *args, int from_tty)
575 {
576 /* Some languages such as Ada need to search inside the program
577 minimal symbols for the location where to put the temporary
578 breakpoint before starting. */
579 if (!have_minimal_symbols ())
580 error (_("No symbol table loaded. Use the \"file\" command."));
581
582 /* Run the program until reaching the main procedure... */
583 run_command_1 (args, from_tty, 1);
584 }
585
586 static int
587 proceed_thread_callback (struct thread_info *thread, void *arg)
588 {
589 /* We go through all threads individually instead of compressing
590 into a single target `resume_all' request, because some threads
591 may be stopped in internal breakpoints/events, or stopped waiting
592 for its turn in the displaced stepping queue (that is, they are
593 running && !executing). The target side has no idea about why
594 the thread is stopped, so a `resume_all' command would resume too
595 much. If/when GDB gains a way to tell the target `hold this
596 thread stopped until I say otherwise', then we can optimize
597 this. */
598 if (!is_stopped (thread->ptid))
599 return 0;
600
601 switch_to_thread (thread->ptid);
602 clear_proceed_status ();
603 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
604 return 0;
605 }
606
607 void
608 continue_1 (int all_threads)
609 {
610 ERROR_NO_INFERIOR;
611
612 if (non_stop && all_threads)
613 {
614 /* Don't error out if the current thread is running, because
615 there may be other stopped threads. */
616 struct cleanup *old_chain;
617
618 /* Backup current thread and selected frame. */
619 old_chain = make_cleanup_restore_current_thread ();
620
621 iterate_over_threads (proceed_thread_callback, NULL);
622
623 /* Restore selected ptid. */
624 do_cleanups (old_chain);
625 }
626 else
627 {
628 ensure_not_running ();
629 clear_proceed_status ();
630 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
631 }
632 }
633
634 /* continue [-a] [proceed-count] [&] */
635 void
636 continue_command (char *args, int from_tty)
637 {
638 int async_exec = 0;
639 int all_threads = 0;
640 ERROR_NO_INFERIOR;
641
642 /* Find out whether we must run in the background. */
643 if (args != NULL)
644 async_exec = strip_bg_char (&args);
645
646 /* If we must run in the background, but the target can't do it,
647 error out. */
648 if (async_exec && !target_can_async_p ())
649 error (_("Asynchronous execution not supported on this target."));
650
651 /* If we are not asked to run in the bg, then prepare to run in the
652 foreground, synchronously. */
653 if (!async_exec && target_can_async_p ())
654 {
655 /* Simulate synchronous execution */
656 async_disable_stdin ();
657 }
658
659 if (args != NULL)
660 {
661 if (strncmp (args, "-a", sizeof ("-a") - 1) == 0)
662 {
663 all_threads = 1;
664 args += sizeof ("-a") - 1;
665 if (*args == '\0')
666 args = NULL;
667 }
668 }
669
670 if (!non_stop && all_threads)
671 error (_("`-a' is meaningless in all-stop mode."));
672
673 if (args != NULL && all_threads)
674 error (_("\
675 Can't resume all threads and specify proceed count simultaneously."));
676
677 /* If we have an argument left, set proceed count of breakpoint we
678 stopped at. */
679 if (args != NULL)
680 {
681 bpstat bs = NULL;
682 int num, stat;
683 int stopped = 0;
684 struct thread_info *tp;
685
686 if (non_stop)
687 tp = find_thread_pid (inferior_ptid);
688 else
689 {
690 ptid_t last_ptid;
691 struct target_waitstatus ws;
692
693 get_last_target_status (&last_ptid, &ws);
694 tp = find_thread_pid (last_ptid);
695 }
696 if (tp != NULL)
697 bs = tp->stop_bpstat;
698
699 while ((stat = bpstat_num (&bs, &num)) != 0)
700 if (stat > 0)
701 {
702 set_ignore_count (num,
703 parse_and_eval_long (args) - 1,
704 from_tty);
705 /* set_ignore_count prints a message ending with a period.
706 So print two spaces before "Continuing.". */
707 if (from_tty)
708 printf_filtered (" ");
709 stopped = 1;
710 }
711
712 if (!stopped && from_tty)
713 {
714 printf_filtered
715 ("Not stopped at any breakpoint; argument ignored.\n");
716 }
717 }
718
719 if (from_tty)
720 printf_filtered (_("Continuing.\n"));
721
722 continue_1 (all_threads);
723 }
724 \f
725 /* Step until outside of current statement. */
726
727 static void
728 step_command (char *count_string, int from_tty)
729 {
730 step_1 (0, 0, count_string);
731 }
732
733 /* Likewise, but skip over subroutine calls as if single instructions. */
734
735 static void
736 next_command (char *count_string, int from_tty)
737 {
738 step_1 (1, 0, count_string);
739 }
740
741 /* Likewise, but step only one instruction. */
742
743 void
744 stepi_command (char *count_string, int from_tty)
745 {
746 step_1 (0, 1, count_string);
747 }
748
749 void
750 nexti_command (char *count_string, int from_tty)
751 {
752 step_1 (1, 1, count_string);
753 }
754
755 static void
756 delete_longjmp_breakpoint_cleanup (void *arg)
757 {
758 int thread = * (int *) arg;
759 delete_longjmp_breakpoint (thread);
760 }
761
762 static void
763 step_1 (int skip_subroutines, int single_inst, char *count_string)
764 {
765 int count = 1;
766 struct frame_info *frame;
767 struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
768 int async_exec = 0;
769 int thread = -1;
770
771 ERROR_NO_INFERIOR;
772 ensure_not_running ();
773
774 if (count_string)
775 async_exec = strip_bg_char (&count_string);
776
777 /* If we get a request for running in the bg but the target
778 doesn't support it, error out. */
779 if (async_exec && !target_can_async_p ())
780 error (_("Asynchronous execution not supported on this target."));
781
782 /* If we don't get a request of running in the bg, then we need
783 to simulate synchronous (fg) execution. */
784 if (!async_exec && target_can_async_p ())
785 {
786 /* Simulate synchronous execution */
787 async_disable_stdin ();
788 }
789
790 count = count_string ? parse_and_eval_long (count_string) : 1;
791
792 if (!single_inst || skip_subroutines) /* leave si command alone */
793 {
794 if (in_thread_list (inferior_ptid))
795 thread = pid_to_thread_id (inferior_ptid);
796
797 set_longjmp_breakpoint ();
798
799 make_cleanup (delete_longjmp_breakpoint_cleanup, &thread);
800 }
801
802 /* In synchronous case, all is well, just use the regular for loop. */
803 if (!target_can_async_p ())
804 {
805 for (; count > 0; count--)
806 {
807 struct thread_info *tp = inferior_thread ();
808 clear_proceed_status ();
809
810 frame = get_current_frame ();
811 tp->step_frame_id = get_frame_id (frame);
812
813 if (!single_inst)
814 {
815 CORE_ADDR pc;
816
817 pc = get_frame_pc (frame);
818 find_pc_line_pc_range (pc,
819 &tp->step_range_start, &tp->step_range_end);
820 if (tp->step_range_end == 0)
821 {
822 char *name;
823 if (find_pc_partial_function (pc, &name,
824 &tp->step_range_start,
825 &tp->step_range_end) == 0)
826 error (_("Cannot find bounds of current function"));
827
828 target_terminal_ours ();
829 printf_filtered (_("\
830 Single stepping until exit from function %s, \n\
831 which has no line number information.\n"), name);
832 }
833 }
834 else
835 {
836 /* Say we are stepping, but stop after one insn whatever it does. */
837 tp->step_range_start = tp->step_range_end = 1;
838 if (!skip_subroutines)
839 /* It is stepi.
840 Don't step over function calls, not even to functions lacking
841 line numbers. */
842 tp->step_over_calls = STEP_OVER_NONE;
843 }
844
845 if (skip_subroutines)
846 tp->step_over_calls = STEP_OVER_ALL;
847
848 tp->step_multi = (count > 1);
849 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1);
850
851 if (!target_has_execution
852 || !inferior_thread ()->stop_step)
853 break;
854 }
855
856 do_cleanups (cleanups);
857 return;
858 }
859 /* In case of asynchronous target things get complicated, do only
860 one step for now, before returning control to the event loop. Let
861 the continuation figure out how many other steps we need to do,
862 and handle them one at the time, through step_once(). */
863 else
864 {
865 step_once (skip_subroutines, single_inst, count, thread);
866 /* We are running, and the continuation is installed. It will
867 disable the longjmp breakpoint as appropriate. */
868 discard_cleanups (cleanups);
869 }
870 }
871
872 struct step_1_continuation_args
873 {
874 int count;
875 int skip_subroutines;
876 int single_inst;
877 int thread;
878 };
879
880 /* Called after we are done with one step operation, to check whether
881 we need to step again, before we print the prompt and return control
882 to the user. If count is > 1, we will need to do one more call to
883 proceed(), via step_once(). Basically it is like step_once and
884 step_1_continuation are co-recursive. */
885 static void
886 step_1_continuation (void *args)
887 {
888 struct step_1_continuation_args *a = args;
889
890 if (target_has_execution)
891 {
892 struct thread_info *tp;
893
894 tp = inferior_thread ();
895 if (tp->step_multi && tp->stop_step)
896 {
897 /* There are more steps to make, and we did stop due to
898 ending a stepping range. Do another step. */
899 step_once (a->skip_subroutines, a->single_inst, a->count - 1, a->thread);
900 return;
901 }
902 tp->step_multi = 0;
903 }
904
905 /* We either stopped for some reason that is not stepping, or there
906 are no further steps to make. Cleanup. */
907 if (!a->single_inst || a->skip_subroutines)
908 delete_longjmp_breakpoint (a->thread);
909 }
910
911 /* Do just one step operation. If count >1 we will have to set up a
912 continuation to be done after the target stops (after this one
913 step). This is useful to implement the 'step n' kind of commands, in
914 case of asynchronous targets. We had to split step_1 into two parts,
915 one to be done before proceed() and one afterwards. This function is
916 called in case of step n with n>1, after the first step operation has
917 been completed.*/
918 static void
919 step_once (int skip_subroutines, int single_inst, int count, int thread)
920 {
921 struct frame_info *frame;
922 struct step_1_continuation_args *args;
923
924 if (count > 0)
925 {
926 /* Don't assume THREAD is a valid thread id. It is set to -1 if
927 the longjmp breakpoint was not required. Use the
928 INFERIOR_PTID thread instead, which is the same thread when
929 THREAD is set. */
930 struct thread_info *tp = inferior_thread ();
931 clear_proceed_status ();
932
933 frame = get_current_frame ();
934 tp->step_frame_id = get_frame_id (frame);
935
936 if (!single_inst)
937 {
938 CORE_ADDR pc;
939
940 pc = get_frame_pc (frame);
941 find_pc_line_pc_range (pc,
942 &tp->step_range_start, &tp->step_range_end);
943
944 /* If we have no line info, switch to stepi mode. */
945 if (tp->step_range_end == 0 && step_stop_if_no_debug)
946 {
947 tp->step_range_start = tp->step_range_end = 1;
948 }
949 else if (tp->step_range_end == 0)
950 {
951 char *name;
952 if (find_pc_partial_function (pc, &name,
953 &tp->step_range_start,
954 &tp->step_range_end) == 0)
955 error (_("Cannot find bounds of current function"));
956
957 target_terminal_ours ();
958 printf_filtered (_("\
959 Single stepping until exit from function %s, \n\
960 which has no line number information.\n"), name);
961 }
962 }
963 else
964 {
965 /* Say we are stepping, but stop after one insn whatever it does. */
966 tp->step_range_start = tp->step_range_end = 1;
967 if (!skip_subroutines)
968 /* It is stepi.
969 Don't step over function calls, not even to functions lacking
970 line numbers. */
971 tp->step_over_calls = STEP_OVER_NONE;
972 }
973
974 if (skip_subroutines)
975 tp->step_over_calls = STEP_OVER_ALL;
976
977 tp->step_multi = (count > 1);
978 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1);
979
980 args = xmalloc (sizeof (*args));
981 args->skip_subroutines = skip_subroutines;
982 args->single_inst = single_inst;
983 args->count = count;
984 args->thread = thread;
985 add_intermediate_continuation (tp, step_1_continuation, args, xfree);
986 }
987 }
988
989 \f
990 /* Continue program at specified address. */
991
992 static void
993 jump_command (char *arg, int from_tty)
994 {
995 CORE_ADDR addr;
996 struct symtabs_and_lines sals;
997 struct symtab_and_line sal;
998 struct symbol *fn;
999 struct symbol *sfn;
1000 int async_exec = 0;
1001
1002 ERROR_NO_INFERIOR;
1003 ensure_not_running ();
1004
1005 /* Find out whether we must run in the background. */
1006 if (arg != NULL)
1007 async_exec = strip_bg_char (&arg);
1008
1009 /* If we must run in the background, but the target can't do it,
1010 error out. */
1011 if (async_exec && !target_can_async_p ())
1012 error (_("Asynchronous execution not supported on this target."));
1013
1014 if (!arg)
1015 error_no_arg (_("starting address"));
1016
1017 sals = decode_line_spec_1 (arg, 1);
1018 if (sals.nelts != 1)
1019 {
1020 error (_("Unreasonable jump request"));
1021 }
1022
1023 sal = sals.sals[0];
1024 xfree (sals.sals);
1025
1026 if (sal.symtab == 0 && sal.pc == 0)
1027 error (_("No source file has been specified."));
1028
1029 resolve_sal_pc (&sal); /* May error out */
1030
1031 /* See if we are trying to jump to another function. */
1032 fn = get_frame_function (get_current_frame ());
1033 sfn = find_pc_function (sal.pc);
1034 if (fn != NULL && sfn != fn)
1035 {
1036 if (!query ("Line %d is not in `%s'. Jump anyway? ", sal.line,
1037 SYMBOL_PRINT_NAME (fn)))
1038 {
1039 error (_("Not confirmed."));
1040 /* NOTREACHED */
1041 }
1042 }
1043
1044 if (sfn != NULL)
1045 {
1046 fixup_symbol_section (sfn, 0);
1047 if (section_is_overlay (SYMBOL_OBJ_SECTION (sfn)) &&
1048 !section_is_mapped (SYMBOL_OBJ_SECTION (sfn)))
1049 {
1050 if (!query ("WARNING!!! Destination is in unmapped overlay! Jump anyway? "))
1051 {
1052 error (_("Not confirmed."));
1053 /* NOTREACHED */
1054 }
1055 }
1056 }
1057
1058 addr = sal.pc;
1059
1060 if (from_tty)
1061 {
1062 printf_filtered (_("Continuing at "));
1063 fputs_filtered (paddress (addr), gdb_stdout);
1064 printf_filtered (".\n");
1065 }
1066
1067 /* If we are not asked to run in the bg, then prepare to run in the
1068 foreground, synchronously. */
1069 if (!async_exec && target_can_async_p ())
1070 {
1071 /* Simulate synchronous execution */
1072 async_disable_stdin ();
1073 }
1074
1075 clear_proceed_status ();
1076 proceed (addr, TARGET_SIGNAL_0, 0);
1077 }
1078 \f
1079
1080 /* Go to line or address in current procedure */
1081 static void
1082 go_command (char *line_no, int from_tty)
1083 {
1084 if (line_no == (char *) NULL || !*line_no)
1085 printf_filtered (_("Usage: go <location>\n"));
1086 else
1087 {
1088 tbreak_command (line_no, from_tty);
1089 jump_command (line_no, from_tty);
1090 }
1091 }
1092 \f
1093
1094 /* Continue program giving it specified signal. */
1095
1096 static void
1097 signal_command (char *signum_exp, int from_tty)
1098 {
1099 enum target_signal oursig;
1100 int async_exec = 0;
1101
1102 dont_repeat (); /* Too dangerous. */
1103 ERROR_NO_INFERIOR;
1104 ensure_not_running ();
1105
1106 /* Find out whether we must run in the background. */
1107 if (signum_exp != NULL)
1108 async_exec = strip_bg_char (&signum_exp);
1109
1110 /* If we must run in the background, but the target can't do it,
1111 error out. */
1112 if (async_exec && !target_can_async_p ())
1113 error (_("Asynchronous execution not supported on this target."));
1114
1115 /* If we are not asked to run in the bg, then prepare to run in the
1116 foreground, synchronously. */
1117 if (!async_exec && target_can_async_p ())
1118 {
1119 /* Simulate synchronous execution. */
1120 async_disable_stdin ();
1121 }
1122
1123 if (!signum_exp)
1124 error_no_arg (_("signal number"));
1125
1126 /* It would be even slicker to make signal names be valid expressions,
1127 (the type could be "enum $signal" or some such), then the user could
1128 assign them to convenience variables. */
1129 oursig = target_signal_from_name (signum_exp);
1130
1131 if (oursig == TARGET_SIGNAL_UNKNOWN)
1132 {
1133 /* No, try numeric. */
1134 int num = parse_and_eval_long (signum_exp);
1135
1136 if (num == 0)
1137 oursig = TARGET_SIGNAL_0;
1138 else
1139 oursig = target_signal_from_command (num);
1140 }
1141
1142 if (from_tty)
1143 {
1144 if (oursig == TARGET_SIGNAL_0)
1145 printf_filtered (_("Continuing with no signal.\n"));
1146 else
1147 printf_filtered (_("Continuing with signal %s.\n"),
1148 target_signal_to_name (oursig));
1149 }
1150
1151 clear_proceed_status ();
1152 /* "signal 0" should not get stuck if we are stopped at a breakpoint.
1153 FIXME: Neither should "signal foo" but when I tried passing
1154 (CORE_ADDR)-1 unconditionally I got a testsuite failure which I haven't
1155 tried to track down yet. */
1156 proceed (oursig == TARGET_SIGNAL_0 ? (CORE_ADDR) -1 : stop_pc, oursig, 0);
1157 }
1158
1159 /* Proceed until we reach a different source line with pc greater than
1160 our current one or exit the function. We skip calls in both cases.
1161
1162 Note that eventually this command should probably be changed so
1163 that only source lines are printed out when we hit the breakpoint
1164 we set. This may involve changes to wait_for_inferior and the
1165 proceed status code. */
1166
1167 static void
1168 until_next_command (int from_tty)
1169 {
1170 struct frame_info *frame;
1171 CORE_ADDR pc;
1172 struct symbol *func;
1173 struct symtab_and_line sal;
1174 struct thread_info *tp = inferior_thread ();
1175
1176 clear_proceed_status ();
1177
1178 frame = get_current_frame ();
1179
1180 /* Step until either exited from this function or greater
1181 than the current line (if in symbolic section) or pc (if
1182 not). */
1183
1184 pc = read_pc ();
1185 func = find_pc_function (pc);
1186
1187 if (!func)
1188 {
1189 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (pc);
1190
1191 if (msymbol == NULL)
1192 error (_("Execution is not within a known function."));
1193
1194 tp->step_range_start = SYMBOL_VALUE_ADDRESS (msymbol);
1195 tp->step_range_end = pc;
1196 }
1197 else
1198 {
1199 sal = find_pc_line (pc, 0);
1200
1201 tp->step_range_start = BLOCK_START (SYMBOL_BLOCK_VALUE (func));
1202 tp->step_range_end = sal.end;
1203 }
1204
1205 tp->step_over_calls = STEP_OVER_ALL;
1206 tp->step_frame_id = get_frame_id (frame);
1207
1208 tp->step_multi = 0; /* Only one call to proceed */
1209
1210 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1);
1211 }
1212
1213 static void
1214 until_command (char *arg, int from_tty)
1215 {
1216 int async_exec = 0;
1217
1218 if (!target_has_execution)
1219 error (_("The program is not running."));
1220
1221 /* Find out whether we must run in the background. */
1222 if (arg != NULL)
1223 async_exec = strip_bg_char (&arg);
1224
1225 /* If we must run in the background, but the target can't do it,
1226 error out. */
1227 if (async_exec && !target_can_async_p ())
1228 error (_("Asynchronous execution not supported on this target."));
1229
1230 /* If we are not asked to run in the bg, then prepare to run in the
1231 foreground, synchronously. */
1232 if (!async_exec && target_can_async_p ())
1233 {
1234 /* Simulate synchronous execution */
1235 async_disable_stdin ();
1236 }
1237
1238 if (arg)
1239 until_break_command (arg, from_tty, 0);
1240 else
1241 until_next_command (from_tty);
1242 }
1243
1244 static void
1245 advance_command (char *arg, int from_tty)
1246 {
1247 int async_exec = 0;
1248
1249 if (!target_has_execution)
1250 error (_("The program is not running."));
1251
1252 if (arg == NULL)
1253 error_no_arg (_("a location"));
1254
1255 /* Find out whether we must run in the background. */
1256 if (arg != NULL)
1257 async_exec = strip_bg_char (&arg);
1258
1259 /* If we must run in the background, but the target can't do it,
1260 error out. */
1261 if (async_exec && !target_can_async_p ())
1262 error (_("Asynchronous execution not supported on this target."));
1263
1264 /* If we are not asked to run in the bg, then prepare to run in the
1265 foreground, synchronously. */
1266 if (!async_exec && target_can_async_p ())
1267 {
1268 /* Simulate synchronous execution. */
1269 async_disable_stdin ();
1270 }
1271
1272 until_break_command (arg, from_tty, 1);
1273 }
1274 \f
1275 /* Print the result of a function at the end of a 'finish' command. */
1276
1277 static void
1278 print_return_value (struct type *func_type, struct type *value_type)
1279 {
1280 struct gdbarch *gdbarch = current_gdbarch;
1281 struct cleanup *old_chain;
1282 struct ui_stream *stb;
1283 struct value *value;
1284
1285 CHECK_TYPEDEF (value_type);
1286 gdb_assert (TYPE_CODE (value_type) != TYPE_CODE_VOID);
1287
1288 /* FIXME: 2003-09-27: When returning from a nested inferior function
1289 call, it's possible (with no help from the architecture vector)
1290 to locate and return/print a "struct return" value. This is just
1291 a more complicated case of what is already being done in in the
1292 inferior function call code. In fact, when inferior function
1293 calls are made async, this will likely be made the norm. */
1294
1295 switch (gdbarch_return_value (gdbarch, func_type, value_type,
1296 NULL, NULL, NULL))
1297 {
1298 case RETURN_VALUE_REGISTER_CONVENTION:
1299 case RETURN_VALUE_ABI_RETURNS_ADDRESS:
1300 case RETURN_VALUE_ABI_PRESERVES_ADDRESS:
1301 value = allocate_value (value_type);
1302 gdbarch_return_value (gdbarch, func_type, value_type, stop_registers,
1303 value_contents_raw (value), NULL);
1304 break;
1305 case RETURN_VALUE_STRUCT_CONVENTION:
1306 value = NULL;
1307 break;
1308 default:
1309 internal_error (__FILE__, __LINE__, _("bad switch"));
1310 }
1311
1312 if (value)
1313 {
1314 struct value_print_options opts;
1315
1316 /* Print it. */
1317 stb = ui_out_stream_new (uiout);
1318 old_chain = make_cleanup_ui_out_stream_delete (stb);
1319 ui_out_text (uiout, "Value returned is ");
1320 ui_out_field_fmt (uiout, "gdb-result-var", "$%d",
1321 record_latest_value (value));
1322 ui_out_text (uiout, " = ");
1323 get_raw_print_options (&opts);
1324 value_print (value, stb->stream, &opts);
1325 ui_out_field_stream (uiout, "return-value", stb);
1326 ui_out_text (uiout, "\n");
1327 do_cleanups (old_chain);
1328 }
1329 else
1330 {
1331 ui_out_text (uiout, "Value returned has type: ");
1332 ui_out_field_string (uiout, "return-type", TYPE_NAME (value_type));
1333 ui_out_text (uiout, ".");
1334 ui_out_text (uiout, " Cannot determine contents\n");
1335 }
1336 }
1337
1338 /* Stuff that needs to be done by the finish command after the target
1339 has stopped. In asynchronous mode, we wait for the target to stop
1340 in the call to poll or select in the event loop, so it is
1341 impossible to do all the stuff as part of the finish_command
1342 function itself. The only chance we have to complete this command
1343 is in fetch_inferior_event, which is called by the event loop as
1344 soon as it detects that the target has stopped. This function is
1345 called via the cmd_continuation pointer. */
1346
1347 struct finish_command_continuation_args
1348 {
1349 struct breakpoint *breakpoint;
1350 struct symbol *function;
1351 };
1352
1353 static void
1354 finish_command_continuation (void *arg)
1355 {
1356 struct finish_command_continuation_args *a = arg;
1357
1358 bpstat bs = NULL;
1359
1360 if (!ptid_equal (inferior_ptid, null_ptid)
1361 && target_has_execution
1362 && is_stopped (inferior_ptid))
1363 bs = inferior_thread ()->stop_bpstat;
1364
1365 if (bpstat_find_breakpoint (bs, a->breakpoint) != NULL
1366 && a->function != NULL)
1367 {
1368 struct type *value_type;
1369
1370 value_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (a->function));
1371 if (!value_type)
1372 internal_error (__FILE__, __LINE__,
1373 _("finish_command: function has no target type"));
1374
1375 if (TYPE_CODE (value_type) != TYPE_CODE_VOID)
1376 print_return_value (SYMBOL_TYPE (a->function), value_type);
1377 }
1378
1379 /* We suppress normal call of normal_stop observer and do it here so
1380 that that *stopped notification includes the return value. */
1381 /* NOTE: This is broken in non-stop mode. There is no guarantee the
1382 next stop will be in the same thread that we started doing a
1383 finish on. This suppressing (or some other replacement means)
1384 should be a thread property. */
1385 observer_notify_normal_stop (bs);
1386 suppress_stop_observer = 0;
1387 delete_breakpoint (a->breakpoint);
1388 }
1389
1390 static void
1391 finish_command_continuation_free_arg (void *arg)
1392 {
1393 /* NOTE: See finish_command_continuation. This would go away, if
1394 this suppressing is made a thread property. */
1395 suppress_stop_observer = 0;
1396 xfree (arg);
1397 }
1398
1399 /* finish_backward -- helper function for finish_command. */
1400
1401 static void
1402 finish_backward (struct symbol *function)
1403 {
1404 struct symtab_and_line sal;
1405 struct thread_info *tp = inferior_thread ();
1406 struct breakpoint *breakpoint;
1407 struct cleanup *old_chain;
1408 CORE_ADDR func_addr;
1409 int back_up;
1410
1411 if (find_pc_partial_function (get_frame_pc (get_current_frame ()),
1412 NULL, &func_addr, NULL) == 0)
1413 internal_error (__FILE__, __LINE__,
1414 _("Finish: couldn't find function."));
1415
1416 sal = find_pc_line (func_addr, 0);
1417
1418 /* We don't need a return value. */
1419 tp->proceed_to_finish = 0;
1420 /* Special case: if we're sitting at the function entry point,
1421 then all we need to do is take a reverse singlestep. We
1422 don't need to set a breakpoint, and indeed it would do us
1423 no good to do so.
1424
1425 Note that this can only happen at frame #0, since there's
1426 no way that a function up the stack can have a return address
1427 that's equal to its entry point. */
1428
1429 if (sal.pc != read_pc ())
1430 {
1431 /* Set breakpoint and continue. */
1432 breakpoint =
1433 set_momentary_breakpoint (sal,
1434 get_frame_id (get_selected_frame (NULL)),
1435 bp_breakpoint);
1436 /* Tell the breakpoint to keep quiet. We won't be done
1437 until we've done another reverse single-step. */
1438 make_breakpoint_silent (breakpoint);
1439 old_chain = make_cleanup_delete_breakpoint (breakpoint);
1440 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
1441 /* We will be stopped when proceed returns. */
1442 back_up = bpstat_find_breakpoint (tp->stop_bpstat, breakpoint) != NULL;
1443 do_cleanups (old_chain);
1444 }
1445 else
1446 back_up = 1;
1447 if (back_up)
1448 {
1449 /* If in fact we hit the step-resume breakpoint (and not
1450 some other breakpoint), then we're almost there --
1451 we just need to back up by one more single-step. */
1452 tp->step_range_start = tp->step_range_end = 1;
1453 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1);
1454 }
1455 return;
1456 }
1457
1458 /* finish_forward -- helper function for finish_command. */
1459
1460 static void
1461 finish_forward (struct symbol *function, struct frame_info *frame)
1462 {
1463 struct symtab_and_line sal;
1464 struct thread_info *tp = inferior_thread ();
1465 struct breakpoint *breakpoint;
1466 struct cleanup *old_chain;
1467 struct finish_command_continuation_args *cargs;
1468
1469 sal = find_pc_line (get_frame_pc (frame), 0);
1470 sal.pc = get_frame_pc (frame);
1471
1472 breakpoint = set_momentary_breakpoint (sal, get_frame_id (frame),
1473 bp_finish);
1474
1475 old_chain = make_cleanup_delete_breakpoint (breakpoint);
1476
1477 tp->proceed_to_finish = 1; /* We want stop_registers, please... */
1478 make_cleanup_restore_integer (&suppress_stop_observer);
1479 suppress_stop_observer = 1;
1480 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
1481
1482 cargs = xmalloc (sizeof (*cargs));
1483
1484 cargs->breakpoint = breakpoint;
1485 cargs->function = function;
1486 add_continuation (tp, finish_command_continuation, cargs,
1487 finish_command_continuation_free_arg);
1488
1489 discard_cleanups (old_chain);
1490 if (!target_can_async_p ())
1491 do_all_continuations ();
1492 }
1493
1494 /* "finish": Set a temporary breakpoint at the place the selected
1495 frame will return to, then continue. */
1496
1497 static void
1498 finish_command (char *arg, int from_tty)
1499 {
1500 struct frame_info *frame;
1501 struct symbol *function;
1502
1503 int async_exec = 0;
1504
1505 /* Find out whether we must run in the background. */
1506 if (arg != NULL)
1507 async_exec = strip_bg_char (&arg);
1508
1509 /* If we must run in the background, but the target can't do it,
1510 error out. */
1511 if (async_exec && !target_can_async_p ())
1512 error (_("Asynchronous execution not supported on this target."));
1513
1514 /* Don't try to async in reverse. */
1515 if (async_exec && execution_direction == EXEC_REVERSE)
1516 error (_("Asynchronous 'finish' not supported in reverse."));
1517
1518 /* If we are not asked to run in the bg, then prepare to run in the
1519 foreground, synchronously. */
1520 if (!async_exec && target_can_async_p ())
1521 {
1522 /* Simulate synchronous execution. */
1523 async_disable_stdin ();
1524 }
1525
1526 if (arg)
1527 error (_("The \"finish\" command does not take any arguments."));
1528 if (!target_has_execution)
1529 error (_("The program is not running."));
1530
1531 frame = get_prev_frame (get_selected_frame (_("No selected frame.")));
1532 if (frame == 0)
1533 error (_("\"finish\" not meaningful in the outermost frame."));
1534
1535 clear_proceed_status ();
1536
1537 /* Find the function we will return from. */
1538
1539 function = find_pc_function (get_frame_pc (get_selected_frame (NULL)));
1540
1541 /* Print info on the selected frame, including level number but not
1542 source. */
1543 if (from_tty)
1544 {
1545 if (execution_direction == EXEC_REVERSE)
1546 printf_filtered (_("Run back to call of "));
1547 else
1548 printf_filtered (_("Run till exit from "));
1549
1550 print_stack_frame (get_selected_frame (NULL), 1, LOCATION);
1551 }
1552
1553 if (execution_direction == EXEC_REVERSE)
1554 finish_backward (function);
1555 else
1556 finish_forward (function, frame);
1557 }
1558 \f
1559
1560 static void
1561 program_info (char *args, int from_tty)
1562 {
1563 bpstat bs;
1564 int num, stat;
1565 struct thread_info *tp;
1566 ptid_t ptid;
1567
1568 if (!target_has_execution)
1569 {
1570 printf_filtered (_("The program being debugged is not being run.\n"));
1571 return;
1572 }
1573
1574 if (non_stop)
1575 ptid = inferior_ptid;
1576 else
1577 {
1578 struct target_waitstatus ws;
1579 get_last_target_status (&ptid, &ws);
1580 }
1581
1582 if (ptid_equal (ptid, null_ptid) || is_exited (ptid))
1583 error (_("Invalid selected thread."));
1584 else if (is_running (ptid))
1585 error (_("Selected thread is running."));
1586
1587 tp = find_thread_pid (ptid);
1588 bs = tp->stop_bpstat;
1589 stat = bpstat_num (&bs, &num);
1590
1591 target_files_info ();
1592 printf_filtered (_("Program stopped at %s.\n"),
1593 hex_string ((unsigned long) stop_pc));
1594 if (tp->stop_step)
1595 printf_filtered (_("It stopped after being stepped.\n"));
1596 else if (stat != 0)
1597 {
1598 /* There may be several breakpoints in the same place, so this
1599 isn't as strange as it seems. */
1600 while (stat != 0)
1601 {
1602 if (stat < 0)
1603 {
1604 printf_filtered (_("\
1605 It stopped at a breakpoint that has since been deleted.\n"));
1606 }
1607 else
1608 printf_filtered (_("It stopped at breakpoint %d.\n"), num);
1609 stat = bpstat_num (&bs, &num);
1610 }
1611 }
1612 else if (tp->stop_signal != TARGET_SIGNAL_0)
1613 {
1614 printf_filtered (_("It stopped with signal %s, %s.\n"),
1615 target_signal_to_name (tp->stop_signal),
1616 target_signal_to_string (tp->stop_signal));
1617 }
1618
1619 if (!from_tty)
1620 {
1621 printf_filtered (_("\
1622 Type \"info stack\" or \"info registers\" for more information.\n"));
1623 }
1624 }
1625 \f
1626 static void
1627 environment_info (char *var, int from_tty)
1628 {
1629 if (var)
1630 {
1631 char *val = get_in_environ (inferior_environ, var);
1632 if (val)
1633 {
1634 puts_filtered (var);
1635 puts_filtered (" = ");
1636 puts_filtered (val);
1637 puts_filtered ("\n");
1638 }
1639 else
1640 {
1641 puts_filtered ("Environment variable \"");
1642 puts_filtered (var);
1643 puts_filtered ("\" not defined.\n");
1644 }
1645 }
1646 else
1647 {
1648 char **vector = environ_vector (inferior_environ);
1649 while (*vector)
1650 {
1651 puts_filtered (*vector++);
1652 puts_filtered ("\n");
1653 }
1654 }
1655 }
1656
1657 static void
1658 set_environment_command (char *arg, int from_tty)
1659 {
1660 char *p, *val, *var;
1661 int nullset = 0;
1662
1663 if (arg == 0)
1664 error_no_arg (_("environment variable and value"));
1665
1666 /* Find seperation between variable name and value */
1667 p = (char *) strchr (arg, '=');
1668 val = (char *) strchr (arg, ' ');
1669
1670 if (p != 0 && val != 0)
1671 {
1672 /* We have both a space and an equals. If the space is before the
1673 equals, walk forward over the spaces til we see a nonspace
1674 (possibly the equals). */
1675 if (p > val)
1676 while (*val == ' ')
1677 val++;
1678
1679 /* Now if the = is after the char following the spaces,
1680 take the char following the spaces. */
1681 if (p > val)
1682 p = val - 1;
1683 }
1684 else if (val != 0 && p == 0)
1685 p = val;
1686
1687 if (p == arg)
1688 error_no_arg (_("environment variable to set"));
1689
1690 if (p == 0 || p[1] == 0)
1691 {
1692 nullset = 1;
1693 if (p == 0)
1694 p = arg + strlen (arg); /* So that savestring below will work */
1695 }
1696 else
1697 {
1698 /* Not setting variable value to null */
1699 val = p + 1;
1700 while (*val == ' ' || *val == '\t')
1701 val++;
1702 }
1703
1704 while (p != arg && (p[-1] == ' ' || p[-1] == '\t'))
1705 p--;
1706
1707 var = savestring (arg, p - arg);
1708 if (nullset)
1709 {
1710 printf_filtered (_("\
1711 Setting environment variable \"%s\" to null value.\n"),
1712 var);
1713 set_in_environ (inferior_environ, var, "");
1714 }
1715 else
1716 set_in_environ (inferior_environ, var, val);
1717 xfree (var);
1718 }
1719
1720 static void
1721 unset_environment_command (char *var, int from_tty)
1722 {
1723 if (var == 0)
1724 {
1725 /* If there is no argument, delete all environment variables.
1726 Ask for confirmation if reading from the terminal. */
1727 if (!from_tty || query (_("Delete all environment variables? ")))
1728 {
1729 free_environ (inferior_environ);
1730 inferior_environ = make_environ ();
1731 }
1732 }
1733 else
1734 unset_in_environ (inferior_environ, var);
1735 }
1736
1737 /* Handle the execution path (PATH variable) */
1738
1739 static const char path_var_name[] = "PATH";
1740
1741 static void
1742 path_info (char *args, int from_tty)
1743 {
1744 puts_filtered ("Executable and object file path: ");
1745 puts_filtered (get_in_environ (inferior_environ, path_var_name));
1746 puts_filtered ("\n");
1747 }
1748
1749 /* Add zero or more directories to the front of the execution path. */
1750
1751 static void
1752 path_command (char *dirname, int from_tty)
1753 {
1754 char *exec_path;
1755 char *env;
1756 dont_repeat ();
1757 env = get_in_environ (inferior_environ, path_var_name);
1758 /* Can be null if path is not set */
1759 if (!env)
1760 env = "";
1761 exec_path = xstrdup (env);
1762 mod_path (dirname, &exec_path);
1763 set_in_environ (inferior_environ, path_var_name, exec_path);
1764 xfree (exec_path);
1765 if (from_tty)
1766 path_info ((char *) NULL, from_tty);
1767 }
1768 \f
1769
1770 /* Print out the machine register regnum. If regnum is -1, print all
1771 registers (print_all == 1) or all non-float and non-vector
1772 registers (print_all == 0).
1773
1774 For most machines, having all_registers_info() print the
1775 register(s) one per line is good enough. If a different format is
1776 required, (eg, for MIPS or Pyramid 90x, which both have lots of
1777 regs), or there is an existing convention for showing all the
1778 registers, define the architecture method PRINT_REGISTERS_INFO to
1779 provide that format. */
1780
1781 void
1782 default_print_registers_info (struct gdbarch *gdbarch,
1783 struct ui_file *file,
1784 struct frame_info *frame,
1785 int regnum, int print_all)
1786 {
1787 int i;
1788 const int numregs = gdbarch_num_regs (gdbarch)
1789 + gdbarch_num_pseudo_regs (gdbarch);
1790 gdb_byte buffer[MAX_REGISTER_SIZE];
1791
1792 for (i = 0; i < numregs; i++)
1793 {
1794 /* Decide between printing all regs, non-float / vector regs, or
1795 specific reg. */
1796 if (regnum == -1)
1797 {
1798 if (print_all)
1799 {
1800 if (!gdbarch_register_reggroup_p (gdbarch, i, all_reggroup))
1801 continue;
1802 }
1803 else
1804 {
1805 if (!gdbarch_register_reggroup_p (gdbarch, i, general_reggroup))
1806 continue;
1807 }
1808 }
1809 else
1810 {
1811 if (i != regnum)
1812 continue;
1813 }
1814
1815 /* If the register name is empty, it is undefined for this
1816 processor, so don't display anything. */
1817 if (gdbarch_register_name (gdbarch, i) == NULL
1818 || *(gdbarch_register_name (gdbarch, i)) == '\0')
1819 continue;
1820
1821 fputs_filtered (gdbarch_register_name (gdbarch, i), file);
1822 print_spaces_filtered (15 - strlen (gdbarch_register_name
1823 (gdbarch, i)), file);
1824
1825 /* Get the data in raw format. */
1826 if (! frame_register_read (frame, i, buffer))
1827 {
1828 fprintf_filtered (file, "*value not available*\n");
1829 continue;
1830 }
1831
1832 /* If virtual format is floating, print it that way, and in raw
1833 hex. */
1834 if (TYPE_CODE (register_type (gdbarch, i)) == TYPE_CODE_FLT
1835 || TYPE_CODE (register_type (gdbarch, i)) == TYPE_CODE_DECFLOAT)
1836 {
1837 int j;
1838 struct value_print_options opts;
1839
1840 get_user_print_options (&opts);
1841 opts.deref_ref = 1;
1842 val_print (register_type (gdbarch, i), buffer, 0, 0,
1843 file, 0, &opts, current_language);
1844
1845 fprintf_filtered (file, "\t(raw 0x");
1846 for (j = 0; j < register_size (gdbarch, i); j++)
1847 {
1848 int idx;
1849 if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
1850 idx = j;
1851 else
1852 idx = register_size (gdbarch, i) - 1 - j;
1853 fprintf_filtered (file, "%02x", (unsigned char) buffer[idx]);
1854 }
1855 fprintf_filtered (file, ")");
1856 }
1857 else
1858 {
1859 struct value_print_options opts;
1860
1861 /* Print the register in hex. */
1862 get_formatted_print_options (&opts, 'x');
1863 opts.deref_ref = 1;
1864 val_print (register_type (gdbarch, i), buffer, 0, 0,
1865 file, 0, &opts,
1866 current_language);
1867 /* If not a vector register, print it also according to its
1868 natural format. */
1869 if (TYPE_VECTOR (register_type (gdbarch, i)) == 0)
1870 {
1871 get_user_print_options (&opts);
1872 opts.deref_ref = 1;
1873 fprintf_filtered (file, "\t");
1874 val_print (register_type (gdbarch, i), buffer, 0, 0,
1875 file, 0, &opts, current_language);
1876 }
1877 }
1878
1879 fprintf_filtered (file, "\n");
1880 }
1881 }
1882
1883 void
1884 registers_info (char *addr_exp, int fpregs)
1885 {
1886 struct frame_info *frame;
1887 struct gdbarch *gdbarch;
1888 int regnum, numregs;
1889 char *end;
1890
1891 if (!target_has_registers)
1892 error (_("The program has no registers now."));
1893 frame = get_selected_frame (NULL);
1894 gdbarch = get_frame_arch (frame);
1895
1896 if (!addr_exp)
1897 {
1898 gdbarch_print_registers_info (gdbarch, gdb_stdout,
1899 frame, -1, fpregs);
1900 return;
1901 }
1902
1903 while (*addr_exp != '\0')
1904 {
1905 char *start;
1906 const char *end;
1907
1908 /* Keep skipping leading white space. */
1909 if (isspace ((*addr_exp)))
1910 {
1911 addr_exp++;
1912 continue;
1913 }
1914
1915 /* Discard any leading ``$''. Check that there is something
1916 resembling a register following it. */
1917 if (addr_exp[0] == '$')
1918 addr_exp++;
1919 if (isspace ((*addr_exp)) || (*addr_exp) == '\0')
1920 error (_("Missing register name"));
1921
1922 /* Find the start/end of this register name/num/group. */
1923 start = addr_exp;
1924 while ((*addr_exp) != '\0' && !isspace ((*addr_exp)))
1925 addr_exp++;
1926 end = addr_exp;
1927
1928 /* Figure out what we've found and display it. */
1929
1930 /* A register name? */
1931 {
1932 int regnum = user_reg_map_name_to_regnum (gdbarch, start, end - start);
1933 if (regnum >= 0)
1934 {
1935 /* User registers lie completely outside of the range of
1936 normal registers. Catch them early so that the target
1937 never sees them. */
1938 if (regnum >= gdbarch_num_regs (gdbarch)
1939 + gdbarch_num_pseudo_regs (gdbarch))
1940 {
1941 struct value_print_options opts;
1942 struct value *val = value_of_user_reg (regnum, frame);
1943
1944 printf_filtered ("%s: ", start);
1945 get_formatted_print_options (&opts, 'x');
1946 print_scalar_formatted (value_contents (val),
1947 check_typedef (value_type (val)),
1948 &opts, 0, gdb_stdout);
1949 printf_filtered ("\n");
1950 }
1951 else
1952 gdbarch_print_registers_info (gdbarch, gdb_stdout,
1953 frame, regnum, fpregs);
1954 continue;
1955 }
1956 }
1957
1958 /* A register number? (how portable is this one?). */
1959 {
1960 char *endptr;
1961 int regnum = strtol (start, &endptr, 0);
1962 if (endptr == end
1963 && regnum >= 0
1964 && regnum < gdbarch_num_regs (gdbarch)
1965 + gdbarch_num_pseudo_regs (gdbarch))
1966 {
1967 gdbarch_print_registers_info (gdbarch, gdb_stdout,
1968 frame, regnum, fpregs);
1969 continue;
1970 }
1971 }
1972
1973 /* A register group? */
1974 {
1975 struct reggroup *group;
1976 for (group = reggroup_next (gdbarch, NULL);
1977 group != NULL;
1978 group = reggroup_next (gdbarch, group))
1979 {
1980 /* Don't bother with a length check. Should the user
1981 enter a short register group name, go with the first
1982 group that matches. */
1983 if (strncmp (start, reggroup_name (group), end - start) == 0)
1984 break;
1985 }
1986 if (group != NULL)
1987 {
1988 int regnum;
1989 for (regnum = 0;
1990 regnum < gdbarch_num_regs (gdbarch)
1991 + gdbarch_num_pseudo_regs (gdbarch);
1992 regnum++)
1993 {
1994 if (gdbarch_register_reggroup_p (gdbarch, regnum, group))
1995 gdbarch_print_registers_info (gdbarch,
1996 gdb_stdout, frame,
1997 regnum, fpregs);
1998 }
1999 continue;
2000 }
2001 }
2002
2003 /* Nothing matched. */
2004 error (_("Invalid register `%.*s'"), (int) (end - start), start);
2005 }
2006 }
2007
2008 void
2009 all_registers_info (char *addr_exp, int from_tty)
2010 {
2011 registers_info (addr_exp, 1);
2012 }
2013
2014 static void
2015 nofp_registers_info (char *addr_exp, int from_tty)
2016 {
2017 registers_info (addr_exp, 0);
2018 }
2019
2020 static void
2021 print_vector_info (struct gdbarch *gdbarch, struct ui_file *file,
2022 struct frame_info *frame, const char *args)
2023 {
2024 if (gdbarch_print_vector_info_p (gdbarch))
2025 gdbarch_print_vector_info (gdbarch, file, frame, args);
2026 else
2027 {
2028 int regnum;
2029 int printed_something = 0;
2030
2031 for (regnum = 0;
2032 regnum < gdbarch_num_regs (gdbarch)
2033 + gdbarch_num_pseudo_regs (gdbarch);
2034 regnum++)
2035 {
2036 if (gdbarch_register_reggroup_p (gdbarch, regnum, vector_reggroup))
2037 {
2038 printed_something = 1;
2039 gdbarch_print_registers_info (gdbarch, file, frame, regnum, 1);
2040 }
2041 }
2042 if (!printed_something)
2043 fprintf_filtered (file, "No vector information\n");
2044 }
2045 }
2046
2047 static void
2048 vector_info (char *args, int from_tty)
2049 {
2050 if (!target_has_registers)
2051 error (_("The program has no registers now."));
2052
2053 print_vector_info (current_gdbarch, gdb_stdout,
2054 get_selected_frame (NULL), args);
2055 }
2056 \f
2057
2058 /* Used in `attach&' command. ARG is a point to an integer
2059 representing a process id. Proceed threads of this process iff
2060 they stopped due to debugger request, and when they did, they
2061 reported a clean stop (TARGET_SIGNAL_0). Do not proceed threads
2062 that have been explicitly been told to stop. */
2063
2064 static int
2065 proceed_after_attach_callback (struct thread_info *thread,
2066 void *arg)
2067 {
2068 int pid = * (int *) arg;
2069
2070 if (ptid_get_pid (thread->ptid) == pid
2071 && !is_exited (thread->ptid)
2072 && !is_executing (thread->ptid)
2073 && !thread->stop_requested
2074 && thread->stop_signal == TARGET_SIGNAL_0)
2075 {
2076 switch_to_thread (thread->ptid);
2077 clear_proceed_status ();
2078 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
2079 }
2080
2081 return 0;
2082 }
2083
2084 static void
2085 proceed_after_attach (int pid)
2086 {
2087 /* Don't error out if the current thread is running, because
2088 there may be other stopped threads. */
2089 struct cleanup *old_chain;
2090
2091 /* Backup current thread and selected frame. */
2092 old_chain = make_cleanup_restore_current_thread ();
2093
2094 iterate_over_threads (proceed_after_attach_callback, &pid);
2095
2096 /* Restore selected ptid. */
2097 do_cleanups (old_chain);
2098 }
2099
2100 /*
2101 * TODO:
2102 * Should save/restore the tty state since it might be that the
2103 * program to be debugged was started on this tty and it wants
2104 * the tty in some state other than what we want. If it's running
2105 * on another terminal or without a terminal, then saving and
2106 * restoring the tty state is a harmless no-op.
2107 * This only needs to be done if we are attaching to a process.
2108 */
2109
2110 /*
2111 attach_command --
2112 takes a program started up outside of gdb and ``attaches'' to it.
2113 This stops it cold in its tracks and allows us to start debugging it.
2114 and wait for the trace-trap that results from attaching. */
2115
2116 static void
2117 attach_command_post_wait (char *args, int from_tty, int async_exec)
2118 {
2119 char *exec_file;
2120 char *full_exec_path = NULL;
2121 struct inferior *inferior;
2122
2123 inferior = current_inferior ();
2124 inferior->stop_soon = NO_STOP_QUIETLY;
2125
2126 /* If no exec file is yet known, try to determine it from the
2127 process itself. */
2128 exec_file = (char *) get_exec_file (0);
2129 if (!exec_file)
2130 {
2131 exec_file = target_pid_to_exec_file (PIDGET (inferior_ptid));
2132 if (exec_file)
2133 {
2134 /* It's possible we don't have a full path, but rather just a
2135 filename. Some targets, such as HP-UX, don't provide the
2136 full path, sigh.
2137
2138 Attempt to qualify the filename against the source path.
2139 (If that fails, we'll just fall back on the original
2140 filename. Not much more we can do...)
2141 */
2142 if (!source_full_path_of (exec_file, &full_exec_path))
2143 full_exec_path = savestring (exec_file, strlen (exec_file));
2144
2145 exec_file_attach (full_exec_path, from_tty);
2146 symbol_file_add_main (full_exec_path, from_tty);
2147 }
2148 }
2149 else
2150 {
2151 reopen_exec_file ();
2152 reread_symbols ();
2153 }
2154
2155 /* Take any necessary post-attaching actions for this platform. */
2156 target_post_attach (PIDGET (inferior_ptid));
2157
2158 post_create_inferior (&current_target, from_tty);
2159
2160 /* Install inferior's terminal modes. */
2161 target_terminal_inferior ();
2162
2163 if (async_exec)
2164 {
2165 /* The user requested an `attach&', so be sure to leave threads
2166 that didn't get a signal running. */
2167
2168 /* Immediatelly resume all suspended threads of this inferior,
2169 and this inferior only. This should have no effect on
2170 already running threads. If a thread has been stopped with a
2171 signal, leave it be. */
2172 if (non_stop)
2173 proceed_after_attach (inferior->pid);
2174 else
2175 {
2176 if (inferior_thread ()->stop_signal == TARGET_SIGNAL_0)
2177 {
2178 clear_proceed_status ();
2179 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
2180 }
2181 }
2182 }
2183 else
2184 {
2185 /* The user requested a plain `attach', so be sure to leave
2186 the inferior stopped. */
2187
2188 if (target_can_async_p ())
2189 async_enable_stdin ();
2190
2191 /* At least the current thread is already stopped. */
2192
2193 /* In all-stop, by definition, all threads have to be already
2194 stopped at this point. In non-stop, however, although the
2195 selected thread is stopped, others may still be executing.
2196 Be sure to explicitly stop all threads of the process. This
2197 should have no effect on already stopped threads. */
2198 if (non_stop)
2199 target_stop (pid_to_ptid (inferior->pid));
2200
2201 /* Tell the user/frontend where we're stopped. */
2202 normal_stop ();
2203 if (deprecated_attach_hook)
2204 deprecated_attach_hook ();
2205 }
2206 }
2207
2208 struct attach_command_continuation_args
2209 {
2210 char *args;
2211 int from_tty;
2212 int async_exec;
2213 };
2214
2215 static void
2216 attach_command_continuation (void *args)
2217 {
2218 struct attach_command_continuation_args *a = args;
2219 attach_command_post_wait (a->args, a->from_tty, a->async_exec);
2220 }
2221
2222 static void
2223 attach_command_continuation_free_args (void *args)
2224 {
2225 struct attach_command_continuation_args *a = args;
2226 xfree (a->args);
2227 xfree (a);
2228 }
2229
2230 void
2231 attach_command (char *args, int from_tty)
2232 {
2233 char *exec_file;
2234 char *full_exec_path = NULL;
2235 int async_exec = 0;
2236 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
2237
2238 dont_repeat (); /* Not for the faint of heart */
2239
2240 if (target_supports_multi_process ())
2241 /* Don't complain if we can be attached to multiple processes. */
2242 ;
2243 else if (target_has_execution)
2244 {
2245 if (query ("A program is being debugged already. Kill it? "))
2246 target_kill ();
2247 else
2248 error (_("Not killed."));
2249 }
2250
2251 /* Clean up any leftovers from other runs. Some other things from
2252 this function should probably be moved into target_pre_inferior. */
2253 target_pre_inferior (from_tty);
2254
2255 if (non_stop && !target_supports_non_stop ())
2256 error (_("Cannot attach to this target in non-stop mode"));
2257
2258 if (args)
2259 {
2260 async_exec = strip_bg_char (&args);
2261
2262 /* If we get a request for running in the bg but the target
2263 doesn't support it, error out. */
2264 if (async_exec && !target_can_async_p ())
2265 error (_("Asynchronous execution not supported on this target."));
2266 }
2267
2268 /* If we don't get a request of running in the bg, then we need
2269 to simulate synchronous (fg) execution. */
2270 if (!async_exec && target_can_async_p ())
2271 {
2272 /* Simulate synchronous execution */
2273 async_disable_stdin ();
2274 make_cleanup ((make_cleanup_ftype *)async_enable_stdin, NULL);
2275 }
2276
2277 target_attach (args, from_tty);
2278
2279 /* Set up the "saved terminal modes" of the inferior
2280 based on what modes we are starting it with. */
2281 target_terminal_init ();
2282
2283 /* Set up execution context to know that we should return from
2284 wait_for_inferior as soon as the target reports a stop. */
2285 init_wait_for_inferior ();
2286 clear_proceed_status ();
2287
2288 if (non_stop)
2289 {
2290 /* If we find that the current thread isn't stopped, explicitly
2291 do so now, because we're going to install breakpoints and
2292 poke at memory. */
2293
2294 if (async_exec)
2295 /* The user requested an `attach&'; stop just one thread. */
2296 target_stop (inferior_ptid);
2297 else
2298 /* The user requested an `attach', so stop all threads of this
2299 inferior. */
2300 target_stop (pid_to_ptid (ptid_get_pid (inferior_ptid)));
2301 }
2302
2303 /* Some system don't generate traps when attaching to inferior.
2304 E.g. Mach 3 or GNU hurd. */
2305 if (!target_attach_no_wait)
2306 {
2307 struct inferior *inferior = current_inferior ();
2308
2309 /* Careful here. See comments in inferior.h. Basically some
2310 OSes don't ignore SIGSTOPs on continue requests anymore. We
2311 need a way for handle_inferior_event to reset the stop_signal
2312 variable after an attach, and this is what
2313 STOP_QUIETLY_NO_SIGSTOP is for. */
2314 inferior->stop_soon = STOP_QUIETLY_NO_SIGSTOP;
2315
2316 if (target_can_async_p ())
2317 {
2318 /* sync_execution mode. Wait for stop. */
2319 struct attach_command_continuation_args *a;
2320
2321 a = xmalloc (sizeof (*a));
2322 a->args = xstrdup (args);
2323 a->from_tty = from_tty;
2324 a->async_exec = async_exec;
2325 add_inferior_continuation (attach_command_continuation, a,
2326 attach_command_continuation_free_args);
2327 discard_cleanups (back_to);
2328 return;
2329 }
2330
2331 wait_for_inferior (0);
2332 }
2333
2334 attach_command_post_wait (args, from_tty, async_exec);
2335 discard_cleanups (back_to);
2336 }
2337
2338 /*
2339 * detach_command --
2340 * takes a program previously attached to and detaches it.
2341 * The program resumes execution and will no longer stop
2342 * on signals, etc. We better not have left any breakpoints
2343 * in the program or it'll die when it hits one. For this
2344 * to work, it may be necessary for the process to have been
2345 * previously attached. It *might* work if the program was
2346 * started via the normal ptrace (PTRACE_TRACEME).
2347 */
2348
2349 void
2350 detach_command (char *args, int from_tty)
2351 {
2352 dont_repeat (); /* Not for the faint of heart. */
2353 target_detach (args, from_tty);
2354
2355 /* If the solist is global across inferiors, don't clear it when we
2356 detach from a single inferior. */
2357 if (!gdbarch_has_global_solist (target_gdbarch))
2358 no_shared_libraries (NULL, from_tty);
2359
2360 /* If the current target interface claims there's still execution,
2361 then don't mess with threads of other processes. */
2362 if (!target_has_execution)
2363 init_thread_list ();
2364
2365 if (deprecated_detach_hook)
2366 deprecated_detach_hook ();
2367 }
2368
2369 /* Disconnect from the current target without resuming it (leaving it
2370 waiting for a debugger).
2371
2372 We'd better not have left any breakpoints in the program or the
2373 next debugger will get confused. Currently only supported for some
2374 remote targets, since the normal attach mechanisms don't work on
2375 stopped processes on some native platforms (e.g. GNU/Linux). */
2376
2377 static void
2378 disconnect_command (char *args, int from_tty)
2379 {
2380 dont_repeat (); /* Not for the faint of heart */
2381 target_disconnect (args, from_tty);
2382 no_shared_libraries (NULL, from_tty);
2383 init_thread_list ();
2384 if (deprecated_detach_hook)
2385 deprecated_detach_hook ();
2386 }
2387
2388 void
2389 interrupt_target_1 (int all_threads)
2390 {
2391 ptid_t ptid;
2392 if (all_threads)
2393 ptid = minus_one_ptid;
2394 else
2395 ptid = inferior_ptid;
2396 target_stop (ptid);
2397
2398 /* Tag the thread as having been explicitly requested to stop, so
2399 other parts of gdb know not to resume this thread automatically,
2400 if it was stopped due to an internal event. Limit this to
2401 non-stop mode, as when debugging a multi-threaded application in
2402 all-stop mode, we will only get one stop event --- it's undefined
2403 which thread will report the event. */
2404 if (non_stop)
2405 set_stop_requested (ptid, 1);
2406 }
2407
2408 /* Stop the execution of the target while running in async mode, in
2409 the backgound. In all-stop, stop the whole process. In non-stop
2410 mode, stop the current thread only by default, or stop all threads
2411 if the `-a' switch is used. */
2412
2413 /* interrupt [-a] */
2414 void
2415 interrupt_target_command (char *args, int from_tty)
2416 {
2417 if (target_can_async_p ())
2418 {
2419 int all_threads = 0;
2420
2421 dont_repeat (); /* Not for the faint of heart */
2422
2423 if (args != NULL
2424 && strncmp (args, "-a", sizeof ("-a") - 1) == 0)
2425 all_threads = 1;
2426
2427 if (!non_stop && all_threads)
2428 error (_("-a is meaningless in all-stop mode."));
2429
2430 interrupt_target_1 (all_threads);
2431 }
2432 }
2433
2434 static void
2435 print_float_info (struct gdbarch *gdbarch, struct ui_file *file,
2436 struct frame_info *frame, const char *args)
2437 {
2438 if (gdbarch_print_float_info_p (gdbarch))
2439 gdbarch_print_float_info (gdbarch, file, frame, args);
2440 else
2441 {
2442 int regnum;
2443 int printed_something = 0;
2444
2445 for (regnum = 0;
2446 regnum < gdbarch_num_regs (gdbarch)
2447 + gdbarch_num_pseudo_regs (gdbarch);
2448 regnum++)
2449 {
2450 if (gdbarch_register_reggroup_p (gdbarch, regnum, float_reggroup))
2451 {
2452 printed_something = 1;
2453 gdbarch_print_registers_info (gdbarch, file, frame, regnum, 1);
2454 }
2455 }
2456 if (!printed_something)
2457 fprintf_filtered (file, "\
2458 No floating-point info available for this processor.\n");
2459 }
2460 }
2461
2462 static void
2463 float_info (char *args, int from_tty)
2464 {
2465 if (!target_has_registers)
2466 error (_("The program has no registers now."));
2467
2468 print_float_info (current_gdbarch, gdb_stdout,
2469 get_selected_frame (NULL), args);
2470 }
2471 \f
2472 static void
2473 unset_command (char *args, int from_tty)
2474 {
2475 printf_filtered (_("\
2476 \"unset\" must be followed by the name of an unset subcommand.\n"));
2477 help_list (unsetlist, "unset ", -1, gdb_stdout);
2478 }
2479
2480 void
2481 _initialize_infcmd (void)
2482 {
2483 struct cmd_list_element *c = NULL;
2484
2485 /* add the filename of the terminal connected to inferior I/O */
2486 add_setshow_filename_cmd ("inferior-tty", class_run,
2487 &inferior_io_terminal, _("\
2488 Set terminal for future runs of program being debugged."), _("\
2489 Show terminal for future runs of program being debugged."), _("\
2490 Usage: set inferior-tty /dev/pts/1"), NULL, NULL, &setlist, &showlist);
2491 add_com_alias ("tty", "set inferior-tty", class_alias, 0);
2492
2493 add_setshow_optional_filename_cmd ("args", class_run,
2494 &inferior_args, _("\
2495 Set argument list to give program being debugged when it is started."), _("\
2496 Show argument list to give program being debugged when it is started."), _("\
2497 Follow this command with any number of args, to be passed to the program."),
2498 notice_args_set,
2499 notice_args_read,
2500 &setlist, &showlist);
2501
2502 c = add_cmd ("environment", no_class, environment_info, _("\
2503 The environment to give the program, or one variable's value.\n\
2504 With an argument VAR, prints the value of environment variable VAR to\n\
2505 give the program being debugged. With no arguments, prints the entire\n\
2506 environment to be given to the program."), &showlist);
2507 set_cmd_completer (c, noop_completer);
2508
2509 add_prefix_cmd ("unset", no_class, unset_command,
2510 _("Complement to certain \"set\" commands."),
2511 &unsetlist, "unset ", 0, &cmdlist);
2512
2513 c = add_cmd ("environment", class_run, unset_environment_command, _("\
2514 Cancel environment variable VAR for the program.\n\
2515 This does not affect the program until the next \"run\" command."),
2516 &unsetlist);
2517 set_cmd_completer (c, noop_completer);
2518
2519 c = add_cmd ("environment", class_run, set_environment_command, _("\
2520 Set environment variable value to give the program.\n\
2521 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
2522 VALUES of environment variables are uninterpreted strings.\n\
2523 This does not affect the program until the next \"run\" command."),
2524 &setlist);
2525 set_cmd_completer (c, noop_completer);
2526
2527 c = add_com ("path", class_files, path_command, _("\
2528 Add directory DIR(s) to beginning of search path for object files.\n\
2529 $cwd in the path means the current working directory.\n\
2530 This path is equivalent to the $PATH shell variable. It is a list of\n\
2531 directories, separated by colons. These directories are searched to find\n\
2532 fully linked executable files and separately compiled object files as needed."));
2533 set_cmd_completer (c, filename_completer);
2534
2535 c = add_cmd ("paths", no_class, path_info, _("\
2536 Current search path for finding object files.\n\
2537 $cwd in the path means the current working directory.\n\
2538 This path is equivalent to the $PATH shell variable. It is a list of\n\
2539 directories, separated by colons. These directories are searched to find\n\
2540 fully linked executable files and separately compiled object files as needed."),
2541 &showlist);
2542 set_cmd_completer (c, noop_completer);
2543
2544 add_com ("attach", class_run, attach_command, _("\
2545 Attach to a process or file outside of GDB.\n\
2546 This command attaches to another target, of the same type as your last\n\
2547 \"target\" command (\"info files\" will show your target stack).\n\
2548 The command may take as argument a process id or a device file.\n\
2549 For a process id, you must have permission to send the process a signal,\n\
2550 and it must have the same effective uid as the debugger.\n\
2551 When using \"attach\" with a process id, the debugger finds the\n\
2552 program running in the process, looking first in the current working\n\
2553 directory, or (if not found there) using the source file search path\n\
2554 (see the \"directory\" command). You can also use the \"file\" command\n\
2555 to specify the program, and to load its symbol table."));
2556
2557 add_prefix_cmd ("detach", class_run, detach_command, _("\
2558 Detach a process or file previously attached.\n\
2559 If a process, it is no longer traced, and it continues its execution. If\n\
2560 you were debugging a file, the file is closed and gdb no longer accesses it."),
2561 &detachlist, "detach ", 0, &cmdlist);
2562
2563 add_com ("disconnect", class_run, disconnect_command, _("\
2564 Disconnect from a target.\n\
2565 The target will wait for another debugger to connect. Not available for\n\
2566 all targets."));
2567
2568 add_com ("signal", class_run, signal_command, _("\
2569 Continue program giving it signal specified by the argument.\n\
2570 An argument of \"0\" means continue program without giving it a signal."));
2571
2572 add_com ("stepi", class_run, stepi_command, _("\
2573 Step one instruction exactly.\n\
2574 Argument N means do this N times (or till program stops for another reason)."));
2575 add_com_alias ("si", "stepi", class_alias, 0);
2576
2577 add_com ("nexti", class_run, nexti_command, _("\
2578 Step one instruction, but proceed through subroutine calls.\n\
2579 Argument N means do this N times (or till program stops for another reason)."));
2580 add_com_alias ("ni", "nexti", class_alias, 0);
2581
2582 add_com ("finish", class_run, finish_command, _("\
2583 Execute until selected stack frame returns.\n\
2584 Upon return, the value returned is printed and put in the value history."));
2585 add_com_alias ("fin", "finish", class_run, 1);
2586
2587 add_com ("next", class_run, next_command, _("\
2588 Step program, proceeding through subroutine calls.\n\
2589 Like the \"step\" command as long as subroutine calls do not happen;\n\
2590 when they do, the call is treated as one instruction.\n\
2591 Argument N means do this N times (or till program stops for another reason)."));
2592 add_com_alias ("n", "next", class_run, 1);
2593 if (xdb_commands)
2594 add_com_alias ("S", "next", class_run, 1);
2595
2596 add_com ("step", class_run, step_command, _("\
2597 Step program until it reaches a different source line.\n\
2598 Argument N means do this N times (or till program stops for another reason)."));
2599 add_com_alias ("s", "step", class_run, 1);
2600
2601 c = add_com ("until", class_run, until_command, _("\
2602 Execute until the program reaches a source line greater than the current\n\
2603 or a specified location (same args as break command) within the current frame."));
2604 set_cmd_completer (c, location_completer);
2605 add_com_alias ("u", "until", class_run, 1);
2606
2607 c = add_com ("advance", class_run, advance_command, _("\
2608 Continue the program up to the given location (same form as args for break command).\n\
2609 Execution will also stop upon exit from the current stack frame."));
2610 set_cmd_completer (c, location_completer);
2611
2612 c = add_com ("jump", class_run, jump_command, _("\
2613 Continue program being debugged at specified line or address.\n\
2614 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
2615 for an address to start at."));
2616 set_cmd_completer (c, location_completer);
2617
2618 if (xdb_commands)
2619 {
2620 c = add_com ("go", class_run, go_command, _("\
2621 Usage: go <location>\n\
2622 Continue program being debugged, stopping at specified line or \n\
2623 address.\n\
2624 Give as argument either LINENUM or *ADDR, where ADDR is an \n\
2625 expression for an address to start at.\n\
2626 This command is a combination of tbreak and jump."));
2627 set_cmd_completer (c, location_completer);
2628 }
2629
2630 if (xdb_commands)
2631 add_com_alias ("g", "go", class_run, 1);
2632
2633 c = add_com ("continue", class_run, continue_command, _("\
2634 Continue program being debugged, after signal or breakpoint.\n\
2635 If proceeding from breakpoint, a number N may be used as an argument,\n\
2636 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
2637 the breakpoint won't break until the Nth time it is reached).\n\
2638 \n\
2639 If non-stop mode is enabled, continue only the current thread,\n\
2640 otherwise all the threads in the program are continued. To \n\
2641 continue all stopped threads in non-stop mode, use the -a option.\n\
2642 Specifying -a and an ignore count simultaneously is an error."));
2643 add_com_alias ("c", "cont", class_run, 1);
2644 add_com_alias ("fg", "cont", class_run, 1);
2645
2646 c = add_com ("run", class_run, run_command, _("\
2647 Start debugged program. You may specify arguments to give it.\n\
2648 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
2649 Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\
2650 With no arguments, uses arguments last specified (with \"run\" or \"set args\").\n\
2651 To cancel previous arguments and run with no arguments,\n\
2652 use \"set args\" without arguments."));
2653 set_cmd_completer (c, filename_completer);
2654 add_com_alias ("r", "run", class_run, 1);
2655 if (xdb_commands)
2656 add_com ("R", class_run, run_no_args_command,
2657 _("Start debugged program with no arguments."));
2658
2659 c = add_com ("start", class_run, start_command, _("\
2660 Run the debugged program until the beginning of the main procedure.\n\
2661 You may specify arguments to give to your program, just as with the\n\
2662 \"run\" command."));
2663 set_cmd_completer (c, filename_completer);
2664
2665 c = add_com ("interrupt", class_run, interrupt_target_command,
2666 _("Interrupt the execution of the debugged program.\n\
2667 If non-stop mode is enabled, interrupt only the current thread,\n\
2668 otherwise all the threads in the program are stopped. To \n\
2669 interrupt all running threads in non-stop mode, use the -a option."));
2670
2671 add_info ("registers", nofp_registers_info, _("\
2672 List of integer registers and their contents, for selected stack frame.\n\
2673 Register name as argument means describe only that register."));
2674 add_info_alias ("r", "registers", 1);
2675
2676 if (xdb_commands)
2677 add_com ("lr", class_info, nofp_registers_info, _("\
2678 List of integer registers and their contents, for selected stack frame.\n\
2679 Register name as argument means describe only that register."));
2680 add_info ("all-registers", all_registers_info, _("\
2681 List of all registers and their contents, for selected stack frame.\n\
2682 Register name as argument means describe only that register."));
2683
2684 add_info ("program", program_info,
2685 _("Execution status of the program."));
2686
2687 add_info ("float", float_info,
2688 _("Print the status of the floating point unit\n"));
2689
2690 add_info ("vector", vector_info,
2691 _("Print the status of the vector unit\n"));
2692
2693 inferior_environ = make_environ ();
2694 init_environ (inferior_environ);
2695 }
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