1 /* Everything about breakpoints, for GDB.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
7 This file is part of GDB.
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 2 of the License, or
12 (at your option) any later version.
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.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
28 #include "breakpoint.h"
30 #include "expression.h"
36 #include "gdbthread.h"
39 #include "gdb_string.h"
46 #include "completer.h"
49 #include "cli/cli-script.h"
50 #include "gdb_assert.h"
53 #include "gdb-events.h"
55 /* Prototypes for local functions. */
57 static void until_break_command_continuation (struct continuation_arg
*arg
);
59 static void catch_command_1 (char *, int, int);
61 static void enable_delete_command (char *, int);
63 static void enable_delete_breakpoint (struct breakpoint
*);
65 static void enable_once_command (char *, int);
67 static void enable_once_breakpoint (struct breakpoint
*);
69 static void disable_command (char *, int);
71 static void enable_command (char *, int);
73 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
75 static void ignore_command (char *, int);
77 static int breakpoint_re_set_one (void *);
79 static void clear_command (char *, int);
81 static void catch_command (char *, int);
83 static void watch_command (char *, int);
85 static int can_use_hardware_watchpoint (struct value
*);
87 extern void break_at_finish_command (char *, int);
88 extern void break_at_finish_at_depth_command (char *, int);
90 extern void tbreak_at_finish_command (char *, int);
92 static void break_command_1 (char *, int, int);
94 static void mention (struct breakpoint
*);
96 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
98 static void check_duplicates (struct breakpoint
*);
100 static void describe_other_breakpoints (CORE_ADDR
, asection
*);
102 static void breakpoints_info (char *, int);
104 static void breakpoint_1 (int, int);
106 static bpstat
bpstat_alloc (struct breakpoint
*, bpstat
);
108 static int breakpoint_cond_eval (void *);
110 static void cleanup_executing_breakpoints (void *);
112 static void commands_command (char *, int);
114 static void condition_command (char *, int);
116 static int get_number_trailer (char **, int);
118 void set_breakpoint_count (int);
127 static int remove_breakpoint (struct breakpoint
*, insertion_state_t
);
129 static enum print_stop_action
print_it_typical (bpstat
);
131 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
135 enum exception_event_kind kind
;
138 args_for_catchpoint_enable
;
140 static int watchpoint_check (void *);
142 static int cover_target_enable_exception_callback (void *);
144 static void maintenance_info_breakpoints (char *, int);
146 static void create_longjmp_breakpoint (char *);
148 static void create_overlay_event_breakpoint (char *);
150 static int hw_breakpoint_used_count (void);
152 static int hw_watchpoint_used_count (enum bptype
, int *);
154 static void hbreak_command (char *, int);
156 static void thbreak_command (char *, int);
158 static void watch_command_1 (char *, int, int);
160 static void rwatch_command (char *, int);
162 static void awatch_command (char *, int);
164 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
166 static void solib_load_unload_1 (char *hookname
,
169 char *cond_string
, enum bptype bp_kind
);
171 static void create_fork_vfork_event_catchpoint (int tempflag
,
173 enum bptype bp_kind
);
175 static void break_at_finish_at_depth_command_1 (char *arg
,
176 int flag
, int from_tty
);
178 static void break_at_finish_command_1 (char *arg
, int flag
, int from_tty
);
180 static void stop_command (char *arg
, int from_tty
);
182 static void stopin_command (char *arg
, int from_tty
);
184 static void stopat_command (char *arg
, int from_tty
);
186 static char *ep_find_event_name_end (char *arg
);
188 static char *ep_parse_optional_if_clause (char **arg
);
190 static char *ep_parse_optional_filename (char **arg
);
192 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
193 static void catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
);
196 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
197 enum exception_event_kind ex_event
,
198 struct symtab_and_line
*sal
);
200 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
201 char *arg
, int tempflag
, int from_tty
);
203 static void tcatch_command (char *arg
, int from_tty
);
205 static void ep_skip_leading_whitespace (char **s
);
207 /* Prototypes for exported functions. */
209 /* If FALSE, gdb will not use hardware support for watchpoints, even
210 if such is available. */
211 static int can_use_hw_watchpoints
;
213 void _initialize_breakpoint (void);
215 extern int addressprint
; /* Print machine addresses? */
217 /* Are we executing breakpoint commands? */
218 static int executing_breakpoint_commands
;
220 /* Are overlay event breakpoints enabled? */
221 static int overlay_events_enabled
;
223 /* Walk the following statement or block through all breakpoints.
224 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
227 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
229 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
230 for (B = breakpoint_chain; \
231 B ? (TMP=B->next, 1): 0; \
234 /* True if SHIFT_INST_REGS defined, false otherwise. */
236 int must_shift_inst_regs
=
237 #if defined(SHIFT_INST_REGS)
244 /* True if breakpoint hit counts should be displayed in breakpoint info. */
246 int show_breakpoint_hit_counts
= 1;
248 /* Chain of all breakpoints defined. */
250 struct breakpoint
*breakpoint_chain
;
252 /* Number of last breakpoint made. */
254 int breakpoint_count
;
256 /* Pointer to current exception event record */
257 static struct exception_event_record
*current_exception_event
;
259 /* Indicator of whether exception catchpoints should be nuked
260 between runs of a program */
261 int exception_catchpoints_are_fragile
= 0;
263 /* Indicator of when exception catchpoints set-up should be
264 reinitialized -- e.g. when program is re-run */
265 int exception_support_initialized
= 0;
267 /* This function returns a pointer to the string representation of the
268 pathname of the dynamically-linked library that has just been
271 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
272 or undefined results are guaranteed.
274 This string's contents are only valid immediately after the
275 inferior has stopped in the dynamic linker hook, and becomes
276 invalid as soon as the inferior is continued. Clients should make
277 a copy of this string if they wish to continue the inferior and
278 then access the string. */
280 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
281 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
284 /* This function returns a pointer to the string representation of the
285 pathname of the dynamically-linked library that has just been
288 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
289 TRUE, or undefined results are guaranteed.
291 This string's contents are only valid immediately after the
292 inferior has stopped in the dynamic linker hook, and becomes
293 invalid as soon as the inferior is continued. Clients should make
294 a copy of this string if they wish to continue the inferior and
295 then access the string. */
297 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
298 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
301 /* This function is called by the "catch load" command. It allows the
302 debugger to be notified by the dynamic linker when a specified
303 library file (or any library file, if filename is NULL) is loaded. */
305 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
306 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
307 error ("catch of library loads not yet implemented on this platform")
310 /* This function is called by the "catch unload" command. It allows
311 the debugger to be notified by the dynamic linker when a specified
312 library file (or any library file, if filename is NULL) is
315 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
316 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
317 error ("catch of library unloads not yet implemented on this platform")
320 /* Set breakpoint count to NUM. */
323 set_breakpoint_count (int num
)
325 breakpoint_count
= num
;
326 set_internalvar (lookup_internalvar ("bpnum"),
327 value_from_longest (builtin_type_int
, (LONGEST
) num
));
330 /* Used in run_command to zero the hit count when a new run starts. */
333 clear_breakpoint_hit_counts (void)
335 struct breakpoint
*b
;
341 /* Default address, symtab and line to put a breakpoint at
342 for "break" command with no arg.
343 if default_breakpoint_valid is zero, the other three are
344 not valid, and "break" with no arg is an error.
346 This set by print_stack_frame, which calls set_default_breakpoint. */
348 int default_breakpoint_valid
;
349 CORE_ADDR default_breakpoint_address
;
350 struct symtab
*default_breakpoint_symtab
;
351 int default_breakpoint_line
;
353 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
354 Advance *PP after the string and any trailing whitespace.
356 Currently the string can either be a number or "$" followed by the name
357 of a convenience variable. Making it an expression wouldn't work well
358 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
360 TRAILER is a character which can be found after the number; most
361 commonly this is `-'. If you don't want a trailer, use \0. */
363 get_number_trailer (char **pp
, int trailer
)
365 int retval
= 0; /* default */
369 /* Empty line means refer to the last breakpoint. */
370 return breakpoint_count
;
373 /* Make a copy of the name, so we can null-terminate it
374 to pass to lookup_internalvar(). */
379 while (isalnum (*p
) || *p
== '_')
381 varname
= (char *) alloca (p
- start
+ 1);
382 strncpy (varname
, start
, p
- start
);
383 varname
[p
- start
] = '\0';
384 val
= value_of_internalvar (lookup_internalvar (varname
));
385 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_INT
)
386 retval
= (int) value_as_long (val
);
389 printf_filtered ("Convenience variable must have integer value.\n");
397 while (*p
>= '0' && *p
<= '9')
400 /* There is no number here. (e.g. "cond a == b"). */
402 /* Skip non-numeric token */
403 while (*p
&& !isspace((int) *p
))
405 /* Return zero, which caller must interpret as error. */
411 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
413 /* Trailing junk: return 0 and let caller print error msg. */
414 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
425 /* Like get_number_trailer, but don't allow a trailer. */
427 get_number (char **pp
)
429 return get_number_trailer (pp
, '\0');
432 /* Parse a number or a range.
433 * A number will be of the form handled by get_number.
434 * A range will be of the form <number1> - <number2>, and
435 * will represent all the integers between number1 and number2,
438 * While processing a range, this fuction is called iteratively;
439 * At each call it will return the next value in the range.
441 * At the beginning of parsing a range, the char pointer PP will
442 * be advanced past <number1> and left pointing at the '-' token.
443 * Subsequent calls will not advance the pointer until the range
444 * is completed. The call that completes the range will advance
445 * pointer PP past <number2>.
449 get_number_or_range (char **pp
)
451 static int last_retval
, end_value
;
452 static char *end_ptr
;
453 static int in_range
= 0;
457 /* Default case: pp is pointing either to a solo number,
458 or to the first number of a range. */
459 last_retval
= get_number_trailer (pp
, '-');
464 /* This is the start of a range (<number1> - <number2>).
465 Skip the '-', parse and remember the second number,
466 and also remember the end of the final token. */
470 while (isspace ((int) *end_ptr
))
471 end_ptr
++; /* skip white space */
472 end_value
= get_number (temp
);
473 if (end_value
< last_retval
)
475 error ("inverted range");
477 else if (end_value
== last_retval
)
479 /* degenerate range (number1 == number2). Advance the
480 token pointer so that the range will be treated as a
489 error ("negative value");
492 /* pp points to the '-' that betokens a range. All
493 number-parsing has already been done. Return the next
494 integer value (one greater than the saved previous value).
495 Do not advance the token pointer 'pp' until the end of range
498 if (++last_retval
== end_value
)
500 /* End of range reached; advance token pointer. */
510 /* condition N EXP -- set break condition of breakpoint N to EXP. */
513 condition_command (char *arg
, int from_tty
)
515 register struct breakpoint
*b
;
520 error_no_arg ("breakpoint number");
523 bnum
= get_number (&p
);
525 error ("Bad breakpoint argument: '%s'", arg
);
528 if (b
->number
== bnum
)
535 if (b
->cond_string
!= NULL
)
536 xfree (b
->cond_string
);
541 b
->cond_string
= NULL
;
543 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
548 /* I don't know if it matters whether this is the string the user
549 typed in or the decompiled expression. */
550 b
->cond_string
= savestring (arg
, strlen (arg
));
551 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->address
), 0);
553 error ("Junk at end of expression");
555 breakpoints_changed ();
556 breakpoint_modify_event (b
->number
);
560 error ("No breakpoint number %d.", bnum
);
565 commands_command (char *arg
, int from_tty
)
567 register struct breakpoint
*b
;
570 struct command_line
*l
;
572 /* If we allowed this, we would have problems with when to
573 free the storage, if we change the commands currently
576 if (executing_breakpoint_commands
)
577 error ("Can't use the \"commands\" command among a breakpoint's commands.");
580 bnum
= get_number (&p
);
583 error ("Unexpected extra arguments following breakpoint number.");
586 if (b
->number
== bnum
)
588 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
590 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
591 l
= read_command_lines (tmpbuf
, from_tty
);
592 do_cleanups (cleanups
);
593 free_command_lines (&b
->commands
);
595 breakpoints_changed ();
596 breakpoint_modify_event (b
->number
);
599 error ("No breakpoint number %d.", bnum
);
602 /* Like target_read_memory() but if breakpoints are inserted, return
603 the shadow contents instead of the breakpoints themselves.
605 Read "memory data" from whatever target or inferior we have.
606 Returns zero if successful, errno value if not. EIO is used
607 for address out of bounds. If breakpoints are inserted, returns
608 shadow contents, not the breakpoints themselves. From breakpoint.c. */
611 read_memory_nobpt (CORE_ADDR memaddr
, char *myaddr
, unsigned len
)
614 struct breakpoint
*b
;
615 CORE_ADDR bp_addr
= 0;
618 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
619 /* No breakpoints on this machine. */
620 return target_read_memory (memaddr
, myaddr
, len
);
624 if (b
->type
== bp_none
)
625 warning ("reading through apparently deleted breakpoint #%d?",
628 /* memory breakpoint? */
629 if (b
->type
== bp_watchpoint
630 || b
->type
== bp_hardware_watchpoint
631 || b
->type
== bp_read_watchpoint
632 || b
->type
== bp_access_watchpoint
)
637 /* Addresses and length of the part of the breakpoint that
639 /* XXXX The m68k, sh and h8300 have different local and remote
640 breakpoint values. BREAKPOINT_FROM_PC still manages to
641 correctly determine the breakpoints memory address and size
642 for these targets. */
643 bp_addr
= b
->address
;
645 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
650 if (bp_addr
+ bp_size
<= memaddr
)
651 /* The breakpoint is entirely before the chunk of memory we
654 if (bp_addr
>= memaddr
+ len
)
655 /* The breakpoint is entirely after the chunk of memory we are
658 /* Copy the breakpoint from the shadow contents, and recurse for
659 the things before and after. */
661 /* Offset within shadow_contents. */
664 if (bp_addr
< memaddr
)
666 /* Only copy the second part of the breakpoint. */
667 bp_size
-= memaddr
- bp_addr
;
668 bptoffset
= memaddr
- bp_addr
;
672 if (bp_addr
+ bp_size
> memaddr
+ len
)
674 /* Only copy the first part of the breakpoint. */
675 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
678 memcpy (myaddr
+ bp_addr
- memaddr
,
679 b
->shadow_contents
+ bptoffset
, bp_size
);
681 if (bp_addr
> memaddr
)
683 /* Copy the section of memory before the breakpoint. */
684 status
= read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
689 if (bp_addr
+ bp_size
< memaddr
+ len
)
691 /* Copy the section of memory after the breakpoint. */
692 status
= read_memory_nobpt (bp_addr
+ bp_size
,
693 myaddr
+ bp_addr
+ bp_size
- memaddr
,
694 memaddr
+ len
- (bp_addr
+ bp_size
));
701 /* Nothing overlaps. Just call read_memory_noerr. */
702 return target_read_memory (memaddr
, myaddr
, len
);
706 /* A wrapper function for inserting catchpoints. */
708 insert_catchpoint (struct ui_out
*uo
, void *args
)
710 struct breakpoint
*b
= (struct breakpoint
*) args
;
716 val
= target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
719 val
= target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
722 val
= target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
725 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
730 throw_exception (RETURN_ERROR
);
735 /* insert_breakpoints is used when starting or continuing the program.
736 remove_breakpoints is used when the program stops.
737 Both return zero if successful,
738 or an `errno' value if could not write the inferior. */
741 insert_breakpoints (void)
743 register struct breakpoint
*b
, *temp
;
744 int return_val
= 0; /* return success code. */
746 int disabled_breaks
= 0;
747 int hw_breakpoint_error
= 0;
748 #ifdef ONE_PROCESS_WRITETEXT
749 int process_warning
= 0;
752 struct ui_file
*tmp_error_stream
= mem_fileopen ();
753 make_cleanup_ui_file_delete (tmp_error_stream
);
755 /* Explicitly mark the warning -- this will only be printed if
756 there was an error. */
757 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
759 ALL_BREAKPOINTS_SAFE (b
, temp
)
761 /* Permanent breakpoints cannot be inserted or removed. Disabled
762 breakpoints should not be inserted. */
763 if (b
->enable_state
!= bp_enabled
)
766 if ((b
->type
== bp_watchpoint
767 || b
->type
== bp_hardware_watchpoint
768 || b
->type
== bp_read_watchpoint
769 || b
->type
== bp_access_watchpoint
) && (!b
->val
))
772 val
= evaluate_expression (b
->exp
);
774 if (VALUE_LAZY (val
))
775 value_fetch_lazy (val
);
778 if (b
->type
!= bp_watchpoint
779 && b
->type
!= bp_hardware_watchpoint
780 && b
->type
!= bp_read_watchpoint
781 && b
->type
!= bp_access_watchpoint
782 && b
->type
!= bp_catch_fork
783 && b
->type
!= bp_catch_vfork
784 && b
->type
!= bp_catch_exec
785 && b
->type
!= bp_catch_throw
786 && b
->type
!= bp_catch_catch
790 /* "Normal" instruction breakpoint: either the standard
791 trap-instruction bp (bp_breakpoint), or a
792 bp_hardware_breakpoint. */
794 /* First check to see if we have to handle an overlay. */
795 if (overlay_debugging
== ovly_off
796 || b
->section
== NULL
797 || !(section_is_overlay (b
->section
)))
799 /* No overlay handling: just set the breakpoint. */
801 if (b
->type
== bp_hardware_breakpoint
)
802 val
= target_insert_hw_breakpoint (b
->address
,
805 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
809 /* This breakpoint is in an overlay section.
810 Shall we set a breakpoint at the LMA? */
811 if (!overlay_events_enabled
)
813 /* Yes -- overlay event support is not active,
814 so we must try to set a breakpoint at the LMA.
815 This will not work for a hardware breakpoint. */
816 if (b
->type
== bp_hardware_breakpoint
)
817 warning ("hardware breakpoint %d not supported in overlay!\n",
821 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
823 /* Set a software (trap) breakpoint at the LMA. */
824 val
= target_insert_breakpoint (addr
, b
->shadow_contents
);
826 fprintf_unfiltered (tmp_error_stream
,
827 "Overlay breakpoint %d failed: in ROM?",
831 /* Shall we set a breakpoint at the VMA? */
832 if (section_is_mapped (b
->section
))
834 /* Yes. This overlay section is mapped into memory. */
835 if (b
->type
== bp_hardware_breakpoint
)
836 val
= target_insert_hw_breakpoint (b
->address
,
839 val
= target_insert_breakpoint (b
->address
,
844 /* No. This breakpoint will not be inserted.
845 No error, but do not mark the bp as 'inserted'. */
852 /* Can't set the breakpoint. */
853 #if defined (DISABLE_UNSETTABLE_BREAK)
854 if (DISABLE_UNSETTABLE_BREAK (b
->address
))
856 /* See also: disable_breakpoints_in_shlibs. */
858 b
->enable_state
= bp_shlib_disabled
;
859 if (!disabled_breaks
)
861 fprintf_unfiltered (tmp_error_stream
,
862 "Cannot insert breakpoint %d.\n",
864 fprintf_unfiltered (tmp_error_stream
,
865 "Temporarily disabling shared library breakpoints:\n");
868 fprintf_unfiltered (tmp_error_stream
,
869 "breakpoint #%d\n", b
->number
);
874 #ifdef ONE_PROCESS_WRITETEXT
877 if (b
->type
== bp_hardware_breakpoint
)
879 hw_breakpoint_error
= 1;
880 fprintf_unfiltered (tmp_error_stream
,
881 "Cannot insert hardware breakpoint %d.\n",
886 fprintf_unfiltered (tmp_error_stream
,
887 "Cannot insert breakpoint %d.\n",
889 fprintf_filtered (tmp_error_stream
,
890 "Error accessing memory address ");
891 print_address_numeric (b
->address
, 1, tmp_error_stream
);
892 fprintf_filtered (tmp_error_stream
, ": %s.\n",
893 safe_strerror (val
));
902 return_val
= val
; /* remember failure */
904 else if (ep_is_exception_catchpoint (b
)
909 /* If we get here, we must have a callback mechanism for exception
910 events -- with g++ style embedded label support, we insert
911 ordinary breakpoints and not catchpoints. */
912 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
915 /* Couldn't set breakpoint for some reason */
916 fprintf_unfiltered (tmp_error_stream
,
917 "Cannot insert catchpoint %d; disabling it.\n",
919 fprintf_filtered (tmp_error_stream
,
920 "Error accessing memory address ");
921 print_address_numeric (b
->address
, 1, tmp_error_stream
);
922 fprintf_filtered (tmp_error_stream
, ": %s.\n",
923 safe_strerror (val
));
924 b
->enable_state
= bp_disabled
;
928 /* Bp set, now make sure callbacks are enabled */
929 /* Format possible error msg */
930 char *message
= xstrprintf ("Error inserting catchpoint %d:\n",
932 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
934 args_for_catchpoint_enable args
;
935 args
.kind
= b
->type
== bp_catch_catch
?
936 EX_EVENT_CATCH
: EX_EVENT_THROW
;
938 val
= catch_errors (cover_target_enable_exception_callback
,
939 &args
, message
, RETURN_MASK_ALL
);
940 do_cleanups (cleanups
);
941 if (val
!= 0 && val
!= -1)
945 /* Check if something went wrong; val == 0 can be ignored */
948 /* something went wrong */
949 fprintf_unfiltered (tmp_error_stream
,
950 "Cannot insert catchpoint %d; disabling it.\n",
952 b
->enable_state
= bp_disabled
;
957 return_val
= val
; /* remember failure */
960 else if ((b
->type
== bp_hardware_watchpoint
||
961 b
->type
== bp_read_watchpoint
||
962 b
->type
== bp_access_watchpoint
)
963 && b
->disposition
!= disp_del_at_next_stop
967 struct frame_info
*saved_frame
;
968 int saved_level
, within_current_scope
;
969 struct value
*mark
= value_mark ();
972 /* Save the current frame and level so we can restore it after
973 evaluating the watchpoint expression on its own frame. */
974 saved_frame
= deprecated_selected_frame
;
975 saved_level
= frame_relative_level (deprecated_selected_frame
);
977 /* Determine if the watchpoint is within scope. */
978 if (b
->exp_valid_block
== NULL
)
979 within_current_scope
= 1;
982 struct frame_info
*fi
;
983 fi
= frame_find_by_id (b
->watchpoint_frame
);
984 within_current_scope
= (fi
!= NULL
);
985 if (within_current_scope
)
989 if (within_current_scope
)
991 /* Evaluate the expression and cut the chain of values
992 produced off from the value chain.
994 Make sure the value returned isn't lazy; we use
995 laziness to determine what memory GDB actually needed
996 in order to compute the value of the expression. */
997 v
= evaluate_expression (b
->exp
);
999 value_release_to_mark (mark
);
1004 /* Look at each value on the value chain. */
1005 for (; v
; v
= v
->next
)
1007 /* If it's a memory location, and GDB actually needed
1008 its contents to evaluate the expression, then we
1010 if (VALUE_LVAL (v
) == lval_memory
1011 && ! VALUE_LAZY (v
))
1013 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
1015 /* We only watch structs and arrays if user asked
1016 for it explicitly, never if they just happen to
1017 appear in the middle of some value chain. */
1018 if (v
== b
->val_chain
1019 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1020 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1025 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1026 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1028 if (b
->type
== bp_read_watchpoint
)
1030 else if (b
->type
== bp_access_watchpoint
)
1033 val
= target_insert_watchpoint (addr
, len
, type
);
1036 /* Don't exit the loop, try to insert
1037 every value on the value chain. That's
1038 because we will be removing all the
1039 watches below, and removing a
1040 watchpoint we didn't insert could have
1048 /* Failure to insert a watchpoint on any memory value in the
1049 value chain brings us here. */
1052 remove_breakpoint (b
, mark_uninserted
);
1053 hw_breakpoint_error
= 1;
1054 fprintf_unfiltered (tmp_error_stream
,
1055 "Could not insert hardware watchpoint %d.\n",
1062 printf_filtered ("Hardware watchpoint %d deleted ", b
->number
);
1063 printf_filtered ("because the program has left the block \n");
1064 printf_filtered ("in which its expression is valid.\n");
1065 if (b
->related_breakpoint
)
1066 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1067 b
->disposition
= disp_del_at_next_stop
;
1070 /* Restore the frame and level. */
1071 if ((saved_frame
!= deprecated_selected_frame
) ||
1072 (saved_level
!= frame_relative_level (deprecated_selected_frame
)))
1073 select_frame (saved_frame
);
1076 return_val
= val
; /* remember failure */
1078 else if ((b
->type
== bp_catch_fork
1079 || b
->type
== bp_catch_vfork
1080 || b
->type
== bp_catch_exec
)
1084 char *prefix
= xstrprintf ("warning: inserting catchpoint %d: ",
1086 struct cleanup
*cleanups
= make_cleanup (xfree
, prefix
);
1087 val
= catch_exceptions (uiout
, insert_catchpoint
, b
, prefix
,
1089 do_cleanups (cleanups
);
1091 b
->enable_state
= bp_disabled
;
1099 /* If a hardware breakpoint or watchpoint was inserted, add a
1100 message about possibly exhausted resources. */
1101 if (hw_breakpoint_error
)
1103 fprintf_unfiltered (tmp_error_stream
,
1104 "Could not insert hardware breakpoints:\n\
1105 You may have requested too many hardware breakpoints/watchpoints.\n");
1107 #ifdef ONE_PROCESS_WRITETEXT
1108 if (process_warning
)
1109 fprintf_unfiltered (tmp_error_stream
,
1110 "The same program may be running in another process.");
1112 target_terminal_ours_for_output ();
1113 error_stream (tmp_error_stream
);
1119 remove_breakpoints (void)
1121 register struct breakpoint
*b
;
1128 val
= remove_breakpoint (b
, mark_uninserted
);
1137 remove_hw_watchpoints (void)
1139 register struct breakpoint
*b
;
1145 && (b
->type
== bp_hardware_watchpoint
1146 || b
->type
== bp_read_watchpoint
1147 || b
->type
== bp_access_watchpoint
))
1149 val
= remove_breakpoint (b
, mark_uninserted
);
1158 reattach_breakpoints (int pid
)
1160 register struct breakpoint
*b
;
1162 struct cleanup
*old_chain
= save_inferior_ptid ();
1164 /* Set inferior_ptid; remove_breakpoint uses this global. */
1165 inferior_ptid
= pid_to_ptid (pid
);
1170 remove_breakpoint (b
, mark_inserted
);
1171 if (b
->type
== bp_hardware_breakpoint
)
1172 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1174 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1177 do_cleanups (old_chain
);
1182 do_cleanups (old_chain
);
1187 update_breakpoints_after_exec (void)
1189 struct breakpoint
*b
;
1190 struct breakpoint
*temp
;
1192 /* Doing this first prevents the badness of having delete_breakpoint()
1193 write a breakpoint's current "shadow contents" to lift the bp. That
1194 shadow is NOT valid after an exec()! */
1195 mark_breakpoints_out ();
1197 ALL_BREAKPOINTS_SAFE (b
, temp
)
1199 /* Solib breakpoints must be explicitly reset after an exec(). */
1200 if (b
->type
== bp_shlib_event
)
1202 delete_breakpoint (b
);
1206 /* Thread event breakpoints must be set anew after an exec(),
1207 as must overlay event breakpoints. */
1208 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1210 delete_breakpoint (b
);
1214 /* Step-resume breakpoints are meaningless after an exec(). */
1215 if (b
->type
== bp_step_resume
)
1217 delete_breakpoint (b
);
1221 /* Ditto the sigtramp handler breakpoints. */
1222 if (b
->type
== bp_through_sigtramp
)
1224 delete_breakpoint (b
);
1228 /* Ditto the exception-handling catchpoints. */
1229 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1231 delete_breakpoint (b
);
1235 /* Don't delete an exec catchpoint, because else the inferior
1236 won't stop when it ought!
1238 Similarly, we probably ought to keep vfork catchpoints, 'cause
1239 on this target, we may not be able to stop when the vfork is
1240 seen, but only when the subsequent exec is seen. (And because
1241 deleting fork catchpoints here but not vfork catchpoints will
1242 seem mysterious to users, keep those too.)
1244 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1245 target address field, if any, is sufficient to have it be reset
1246 automagically. Certainly on HP-UX that's true.
1248 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1249 valid code address on some platforms (like the OBSOLETE mn10200
1250 and mn10300 simulators). We shouldn't assign any special
1251 interpretation to a breakpoint with a zero address. And in
1252 fact, GDB doesn't --- I can't see what that comment above is
1253 talking about. As far as I can tell, setting the address of a
1254 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1255 is meaningless, since those are implemented with HP-UX kernel
1256 hackery, not by storing breakpoint instructions somewhere. */
1257 if ((b
->type
== bp_catch_exec
) ||
1258 (b
->type
== bp_catch_vfork
) ||
1259 (b
->type
== bp_catch_fork
))
1261 b
->address
= (CORE_ADDR
) NULL
;
1265 /* bp_finish is a special case. The only way we ought to be able
1266 to see one of these when an exec() has happened, is if the user
1267 caught a vfork, and then said "finish". Ordinarily a finish just
1268 carries them to the call-site of the current callee, by setting
1269 a temporary bp there and resuming. But in this case, the finish
1270 will carry them entirely through the vfork & exec.
1272 We don't want to allow a bp_finish to remain inserted now. But
1273 we can't safely delete it, 'cause finish_command has a handle to
1274 the bp on a bpstat, and will later want to delete it. There's a
1275 chance (and I've seen it happen) that if we delete the bp_finish
1276 here, that its storage will get reused by the time finish_command
1277 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1278 We really must allow finish_command to delete a bp_finish.
1280 In the absense of a general solution for the "how do we know
1281 it's safe to delete something others may have handles to?"
1282 problem, what we'll do here is just uninsert the bp_finish, and
1283 let finish_command delete it.
1285 (We know the bp_finish is "doomed" in the sense that it's
1286 momentary, and will be deleted as soon as finish_command sees
1287 the inferior stopped. So it doesn't matter that the bp's
1288 address is probably bogus in the new a.out, unlike e.g., the
1289 solib breakpoints.) */
1291 if (b
->type
== bp_finish
)
1296 /* Without a symbolic address, we have little hope of the
1297 pre-exec() address meaning the same thing in the post-exec()
1299 if (b
->addr_string
== NULL
)
1301 delete_breakpoint (b
);
1305 /* If this breakpoint has survived the above battery of checks, then
1306 it must have a symbolic address. Be sure that it gets reevaluated
1307 to a target address, rather than reusing the old evaluation.
1309 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1310 for bp_catch_exec and friends, I'm pretty sure this is entirely
1311 unnecessary. A call to breakpoint_re_set_one always recomputes
1312 the breakpoint's address from scratch, or deletes it if it can't.
1313 So I think this assignment could be deleted without effect. */
1314 b
->address
= (CORE_ADDR
) NULL
;
1316 /* FIXME what about longjmp breakpoints? Re-create them here? */
1317 create_overlay_event_breakpoint ("_ovly_debug_event");
1321 detach_breakpoints (int pid
)
1323 register struct breakpoint
*b
;
1325 struct cleanup
*old_chain
= save_inferior_ptid ();
1327 if (pid
== PIDGET (inferior_ptid
))
1328 error ("Cannot detach breakpoints of inferior_ptid");
1330 /* Set inferior_ptid; remove_breakpoint uses this global. */
1331 inferior_ptid
= pid_to_ptid (pid
);
1336 val
= remove_breakpoint (b
, mark_inserted
);
1339 do_cleanups (old_chain
);
1344 do_cleanups (old_chain
);
1349 remove_breakpoint (struct breakpoint
*b
, insertion_state_t is
)
1353 if (b
->enable_state
== bp_permanent
)
1354 /* Permanent breakpoints cannot be inserted or removed. */
1357 if (b
->type
== bp_none
)
1358 warning ("attempted to remove apparently deleted breakpoint #%d?",
1361 if (b
->type
!= bp_watchpoint
1362 && b
->type
!= bp_hardware_watchpoint
1363 && b
->type
!= bp_read_watchpoint
1364 && b
->type
!= bp_access_watchpoint
1365 && b
->type
!= bp_catch_fork
1366 && b
->type
!= bp_catch_vfork
1367 && b
->type
!= bp_catch_exec
1368 && b
->type
!= bp_catch_catch
1369 && b
->type
!= bp_catch_throw
)
1371 /* "Normal" instruction breakpoint: either the standard
1372 trap-instruction bp (bp_breakpoint), or a
1373 bp_hardware_breakpoint. */
1375 /* First check to see if we have to handle an overlay. */
1376 if (overlay_debugging
== ovly_off
1377 || b
->section
== NULL
1378 || !(section_is_overlay (b
->section
)))
1380 /* No overlay handling: just remove the breakpoint. */
1382 if (b
->type
== bp_hardware_breakpoint
)
1383 val
= target_remove_hw_breakpoint (b
->address
,
1384 b
->shadow_contents
);
1386 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1390 /* This breakpoint is in an overlay section.
1391 Did we set a breakpoint at the LMA? */
1392 if (!overlay_events_enabled
)
1394 /* Yes -- overlay event support is not active, so we
1395 should have set a breakpoint at the LMA. Remove it.
1397 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1399 /* Ignore any failures: if the LMA is in ROM, we will
1400 have already warned when we failed to insert it. */
1401 if (b
->type
!= bp_hardware_breakpoint
)
1402 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1404 target_remove_breakpoint (addr
, b
->shadow_contents
);
1406 /* Did we set a breakpoint at the VMA?
1407 If so, we will have marked the breakpoint 'inserted'. */
1410 /* Yes -- remove it. Previously we did not bother to
1411 remove the breakpoint if the section had been
1412 unmapped, but let's not rely on that being safe. We
1413 don't know what the overlay manager might do. */
1414 if (b
->type
== bp_hardware_breakpoint
)
1415 val
= target_remove_hw_breakpoint (b
->address
,
1416 b
->shadow_contents
);
1418 val
= target_remove_breakpoint (b
->address
,
1419 b
->shadow_contents
);
1423 /* No -- not inserted, so no need to remove. No error. */
1429 b
->inserted
= (is
== mark_inserted
);
1431 else if ((b
->type
== bp_hardware_watchpoint
||
1432 b
->type
== bp_read_watchpoint
||
1433 b
->type
== bp_access_watchpoint
)
1434 && b
->enable_state
== bp_enabled
1440 b
->inserted
= (is
== mark_inserted
);
1441 /* Walk down the saved value chain. */
1442 for (v
= b
->val_chain
; v
; v
= v
->next
)
1444 /* For each memory reference remove the watchpoint
1446 if (VALUE_LVAL (v
) == lval_memory
1447 && ! VALUE_LAZY (v
))
1449 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
1451 if (v
== b
->val_chain
1452 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1453 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1458 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1459 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1461 if (b
->type
== bp_read_watchpoint
)
1463 else if (b
->type
== bp_access_watchpoint
)
1466 val
= target_remove_watchpoint (addr
, len
, type
);
1473 /* Failure to remove any of the hardware watchpoints comes here. */
1474 if ((is
== mark_uninserted
) && (b
->inserted
))
1475 warning ("Could not remove hardware watchpoint %d.",
1478 /* Free the saved value chain. We will construct a new one
1479 the next time the watchpoint is inserted. */
1480 for (v
= b
->val_chain
; v
; v
= n
)
1485 b
->val_chain
= NULL
;
1487 else if ((b
->type
== bp_catch_fork
||
1488 b
->type
== bp_catch_vfork
||
1489 b
->type
== bp_catch_exec
)
1490 && b
->enable_state
== bp_enabled
1497 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1499 case bp_catch_vfork
:
1500 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1503 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1506 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1511 b
->inserted
= (is
== mark_inserted
);
1513 else if ((b
->type
== bp_catch_catch
||
1514 b
->type
== bp_catch_throw
)
1515 && b
->enable_state
== bp_enabled
1519 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1522 b
->inserted
= (is
== mark_inserted
);
1524 else if (ep_is_exception_catchpoint (b
)
1525 && b
->inserted
/* sometimes previous insert doesn't happen */
1526 && b
->enable_state
== bp_enabled
1530 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1534 b
->inserted
= (is
== mark_inserted
);
1540 /* Clear the "inserted" flag in all breakpoints. */
1543 mark_breakpoints_out (void)
1545 register struct breakpoint
*b
;
1551 /* Clear the "inserted" flag in all breakpoints and delete any
1552 breakpoints which should go away between runs of the program.
1554 Plus other such housekeeping that has to be done for breakpoints
1557 Note: this function gets called at the end of a run (by
1558 generic_mourn_inferior) and when a run begins (by
1559 init_wait_for_inferior). */
1564 breakpoint_init_inferior (enum inf_context context
)
1566 register struct breakpoint
*b
, *temp
;
1567 static int warning_needed
= 0;
1569 ALL_BREAKPOINTS_SAFE (b
, temp
)
1576 case bp_watchpoint_scope
:
1578 /* If the call dummy breakpoint is at the entry point it will
1579 cause problems when the inferior is rerun, so we better
1582 Also get rid of scope breakpoints. */
1583 delete_breakpoint (b
);
1587 case bp_hardware_watchpoint
:
1588 case bp_read_watchpoint
:
1589 case bp_access_watchpoint
:
1591 /* Likewise for watchpoints on local expressions. */
1592 if (b
->exp_valid_block
!= NULL
)
1593 delete_breakpoint (b
);
1594 if (context
== inf_starting
)
1596 /* Reset val field to force reread of starting value
1597 in insert_breakpoints. */
1599 value_free (b
->val
);
1604 /* Likewise for exception catchpoints in dynamic-linked
1605 executables where required */
1606 if (ep_is_exception_catchpoint (b
) &&
1607 exception_catchpoints_are_fragile
)
1610 delete_breakpoint (b
);
1616 if (exception_catchpoints_are_fragile
)
1617 exception_support_initialized
= 0;
1619 /* Don't issue the warning unless it's really needed... */
1620 if (warning_needed
&& (context
!= inf_exited
))
1622 warning ("Exception catchpoints from last run were deleted.");
1623 warning ("You must reinsert them explicitly.");
1628 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1629 exists at PC. It returns ordinary_breakpoint_here if it's an
1630 ordinary breakpoint, or permanent_breakpoint_here if it's a
1631 permanent breakpoint.
1632 - When continuing from a location with an ordinary breakpoint, we
1633 actually single step once before calling insert_breakpoints.
1634 - When continuing from a localion with a permanent breakpoint, we
1635 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1636 the target, to advance the PC past the breakpoint. */
1638 enum breakpoint_here
1639 breakpoint_here_p (CORE_ADDR pc
)
1641 register struct breakpoint
*b
;
1642 int any_breakpoint_here
= 0;
1645 if ((b
->enable_state
== bp_enabled
1646 || b
->enable_state
== bp_permanent
)
1647 && b
->address
== pc
) /* bp is enabled and matches pc */
1649 if (overlay_debugging
1650 && section_is_overlay (b
->section
)
1651 && !section_is_mapped (b
->section
))
1652 continue; /* unmapped overlay -- can't be a match */
1653 else if (b
->enable_state
== bp_permanent
)
1654 return permanent_breakpoint_here
;
1656 any_breakpoint_here
= 1;
1659 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1663 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1664 but it only returns true if there is actually a breakpoint inserted
1668 breakpoint_inserted_here_p (CORE_ADDR pc
)
1670 register struct breakpoint
*b
;
1674 && b
->address
== pc
) /* bp is inserted and matches pc */
1676 if (overlay_debugging
1677 && section_is_overlay (b
->section
)
1678 && !section_is_mapped (b
->section
))
1679 continue; /* unmapped overlay -- can't be a match */
1687 /* Return nonzero if FRAME is a dummy frame. We can't use
1688 DEPRECATED_PC_IN_CALL_DUMMY because figuring out the saved SP would
1689 take too much time, at least using frame_register() on the 68k.
1690 This means that for this function to work right a port must use the
1691 bp_call_dummy breakpoint. */
1694 deprecated_frame_in_dummy (struct frame_info
*frame
)
1696 struct breakpoint
*b
;
1698 /* This function is used by two files: get_frame_type(), after first
1699 checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and
1700 sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */
1701 gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES
);
1705 if (b
->type
== bp_call_dummy
1706 && frame_id_eq (b
->frame_id
, get_frame_id (frame
))
1707 /* We need to check the PC as well as the frame on the sparc,
1708 for signals.exp in the testsuite. */
1709 && (get_frame_pc (frame
)
1711 - DEPRECATED_SIZEOF_CALL_DUMMY_WORDS
/ sizeof (LONGEST
) * DEPRECATED_REGISTER_SIZE
))
1712 && get_frame_pc (frame
) <= b
->address
)
1718 /* breakpoint_thread_match (PC, PID) returns true if the breakpoint at
1719 PC is valid for process/thread PID. */
1722 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1724 struct breakpoint
*b
;
1727 thread
= pid_to_thread_id (ptid
);
1730 if (b
->enable_state
!= bp_disabled
1731 && b
->enable_state
!= bp_shlib_disabled
1732 && b
->enable_state
!= bp_call_disabled
1734 && (b
->thread
== -1 || b
->thread
== thread
))
1736 if (overlay_debugging
1737 && section_is_overlay (b
->section
)
1738 && !section_is_mapped (b
->section
))
1739 continue; /* unmapped overlay -- can't be a match */
1748 /* bpstat stuff. External routines' interfaces are documented
1752 ep_is_catchpoint (struct breakpoint
*ep
)
1755 (ep
->type
== bp_catch_load
)
1756 || (ep
->type
== bp_catch_unload
)
1757 || (ep
->type
== bp_catch_fork
)
1758 || (ep
->type
== bp_catch_vfork
)
1759 || (ep
->type
== bp_catch_exec
)
1760 || (ep
->type
== bp_catch_catch
)
1761 || (ep
->type
== bp_catch_throw
);
1763 /* ??rehrauer: Add more kinds here, as are implemented... */
1767 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1770 (ep
->type
== bp_catch_load
)
1771 || (ep
->type
== bp_catch_unload
);
1775 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1778 (ep
->type
== bp_catch_catch
)
1779 || (ep
->type
== bp_catch_throw
);
1782 /* Clear a bpstat so that it says we are not at any breakpoint.
1783 Also free any storage that is part of a bpstat. */
1786 bpstat_clear (bpstat
*bsp
)
1797 if (p
->old_val
!= NULL
)
1798 value_free (p
->old_val
);
1799 free_command_lines (&p
->commands
);
1806 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1807 is part of the bpstat is copied as well. */
1810 bpstat_copy (bpstat bs
)
1814 bpstat retval
= NULL
;
1819 for (; bs
!= NULL
; bs
= bs
->next
)
1821 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1822 memcpy (tmp
, bs
, sizeof (*tmp
));
1823 if (bs
->commands
!= NULL
)
1824 tmp
->commands
= copy_command_lines (bs
->commands
);
1825 if (bs
->old_val
!= NULL
)
1826 tmp
->old_val
= value_copy (bs
->old_val
);
1829 /* This is the first thing in the chain. */
1839 /* Find the bpstat associated with this breakpoint */
1842 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1847 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1849 if (bsp
->breakpoint_at
== breakpoint
)
1855 /* Find a step_resume breakpoint associated with this bpstat.
1856 (If there are multiple step_resume bp's on the list, this function
1857 will arbitrarily pick one.)
1859 It is an error to use this function if BPSTAT doesn't contain a
1860 step_resume breakpoint.
1862 See wait_for_inferior's use of this function. */
1864 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1869 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1871 current_thread
= pid_to_thread_id (inferior_ptid
);
1873 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1875 if ((bsp
->breakpoint_at
!= NULL
) &&
1876 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1877 (bsp
->breakpoint_at
->thread
== current_thread
||
1878 bsp
->breakpoint_at
->thread
== -1))
1879 return bsp
->breakpoint_at
;
1882 error ("Internal error (no step_resume breakpoint found)");
1886 /* Return the breakpoint number of the first breakpoint we are stopped
1887 at. *BSP upon return is a bpstat which points to the remaining
1888 breakpoints stopped at (but which is not guaranteed to be good for
1889 anything but further calls to bpstat_num).
1890 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1893 bpstat_num (bpstat
*bsp
)
1895 struct breakpoint
*b
;
1898 return 0; /* No more breakpoint values */
1901 b
= (*bsp
)->breakpoint_at
;
1902 *bsp
= (*bsp
)->next
;
1904 return -1; /* breakpoint that's been deleted since */
1906 return b
->number
; /* We have its number */
1910 /* Modify BS so that the actions will not be performed. */
1913 bpstat_clear_actions (bpstat bs
)
1915 for (; bs
!= NULL
; bs
= bs
->next
)
1917 free_command_lines (&bs
->commands
);
1918 if (bs
->old_val
!= NULL
)
1920 value_free (bs
->old_val
);
1926 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1929 cleanup_executing_breakpoints (void *ignore
)
1931 executing_breakpoint_commands
= 0;
1934 /* Execute all the commands associated with all the breakpoints at this
1935 location. Any of these commands could cause the process to proceed
1936 beyond this point, etc. We look out for such changes by checking
1937 the global "breakpoint_proceeded" after each command. */
1940 bpstat_do_actions (bpstat
*bsp
)
1943 struct cleanup
*old_chain
;
1944 struct command_line
*cmd
;
1946 /* Avoid endless recursion if a `source' command is contained
1948 if (executing_breakpoint_commands
)
1951 executing_breakpoint_commands
= 1;
1952 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
1955 /* Note that (as of this writing), our callers all appear to
1956 be passing us the address of global stop_bpstat. And, if
1957 our calls to execute_control_command cause the inferior to
1958 proceed, that global (and hence, *bsp) will change.
1960 We must be careful to not touch *bsp unless the inferior
1961 has not proceeded. */
1963 /* This pointer will iterate over the list of bpstat's. */
1966 breakpoint_proceeded
= 0;
1967 for (; bs
!= NULL
; bs
= bs
->next
)
1972 execute_control_command (cmd
);
1974 if (breakpoint_proceeded
)
1979 if (breakpoint_proceeded
)
1980 /* The inferior is proceeded by the command; bomb out now.
1981 The bpstat chain has been blown away by wait_for_inferior.
1982 But since execution has stopped again, there is a new bpstat
1983 to look at, so start over. */
1986 free_command_lines (&bs
->commands
);
1988 do_cleanups (old_chain
);
1991 /* This is the normal print function for a bpstat. In the future,
1992 much of this logic could (should?) be moved to bpstat_stop_status,
1993 by having it set different print_it values.
1995 Current scheme: When we stop, bpstat_print() is called. It loops
1996 through the bpstat list of things causing this stop, calling the
1997 print_bp_stop_message function on each one. The behavior of the
1998 print_bp_stop_message function depends on the print_it field of
1999 bpstat. If such field so indicates, call this function here.
2001 Return values from this routine (ultimately used by bpstat_print()
2002 and normal_stop() to decide what to do):
2003 PRINT_NOTHING: Means we already printed all we needed to print,
2004 don't print anything else.
2005 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2006 that something to be followed by a location.
2007 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2008 that something to be followed by a location.
2009 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2012 static enum print_stop_action
2013 print_it_typical (bpstat bs
)
2015 struct cleanup
*old_chain
, *ui_out_chain
;
2016 struct ui_stream
*stb
;
2017 stb
= ui_out_stream_new (uiout
);
2018 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2019 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2020 which has since been deleted. */
2021 if (bs
->breakpoint_at
== NULL
)
2022 return PRINT_UNKNOWN
;
2024 switch (bs
->breakpoint_at
->type
)
2027 case bp_hardware_breakpoint
:
2028 annotate_breakpoint (bs
->breakpoint_at
->number
);
2029 ui_out_text (uiout
, "\nBreakpoint ");
2030 if (ui_out_is_mi_like_p (uiout
))
2031 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2032 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2033 ui_out_text (uiout
, ", ");
2034 return PRINT_SRC_AND_LOC
;
2037 case bp_shlib_event
:
2038 /* Did we stop because the user set the stop_on_solib_events
2039 variable? (If so, we report this as a generic, "Stopped due
2040 to shlib event" message.) */
2041 printf_filtered ("Stopped due to shared library event\n");
2042 return PRINT_NOTHING
;
2045 case bp_thread_event
:
2046 /* Not sure how we will get here.
2047 GDB should not stop for these breakpoints. */
2048 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2049 return PRINT_NOTHING
;
2052 case bp_overlay_event
:
2053 /* By analogy with the thread event, GDB should not stop for these. */
2054 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2055 return PRINT_NOTHING
;
2059 annotate_catchpoint (bs
->breakpoint_at
->number
);
2060 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2061 printf_filtered ("loaded");
2062 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2063 return PRINT_SRC_AND_LOC
;
2066 case bp_catch_unload
:
2067 annotate_catchpoint (bs
->breakpoint_at
->number
);
2068 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2069 printf_filtered ("unloaded");
2070 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2071 return PRINT_SRC_AND_LOC
;
2075 annotate_catchpoint (bs
->breakpoint_at
->number
);
2076 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2077 printf_filtered ("forked");
2078 printf_filtered (" process %d), ",
2079 bs
->breakpoint_at
->forked_inferior_pid
);
2080 return PRINT_SRC_AND_LOC
;
2083 case bp_catch_vfork
:
2084 annotate_catchpoint (bs
->breakpoint_at
->number
);
2085 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2086 printf_filtered ("vforked");
2087 printf_filtered (" process %d), ",
2088 bs
->breakpoint_at
->forked_inferior_pid
);
2089 return PRINT_SRC_AND_LOC
;
2093 annotate_catchpoint (bs
->breakpoint_at
->number
);
2094 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2095 bs
->breakpoint_at
->number
,
2096 bs
->breakpoint_at
->exec_pathname
);
2097 return PRINT_SRC_AND_LOC
;
2100 case bp_catch_catch
:
2101 if (current_exception_event
&&
2102 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2104 annotate_catchpoint (bs
->breakpoint_at
->number
);
2105 printf_filtered ("\nCatchpoint %d (exception caught), ",
2106 bs
->breakpoint_at
->number
);
2107 printf_filtered ("throw location ");
2108 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2109 printf_filtered ("%s:%d",
2110 CURRENT_EXCEPTION_THROW_FILE
,
2111 CURRENT_EXCEPTION_THROW_LINE
);
2113 printf_filtered ("unknown");
2115 printf_filtered (", catch location ");
2116 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2117 printf_filtered ("%s:%d",
2118 CURRENT_EXCEPTION_CATCH_FILE
,
2119 CURRENT_EXCEPTION_CATCH_LINE
);
2121 printf_filtered ("unknown");
2123 printf_filtered ("\n");
2124 /* don't bother to print location frame info */
2125 return PRINT_SRC_ONLY
;
2129 /* really throw, some other bpstat will handle it */
2130 return PRINT_UNKNOWN
;
2134 case bp_catch_throw
:
2135 if (current_exception_event
&&
2136 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2138 annotate_catchpoint (bs
->breakpoint_at
->number
);
2139 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2140 bs
->breakpoint_at
->number
);
2141 printf_filtered ("throw location ");
2142 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2143 printf_filtered ("%s:%d",
2144 CURRENT_EXCEPTION_THROW_FILE
,
2145 CURRENT_EXCEPTION_THROW_LINE
);
2147 printf_filtered ("unknown");
2149 printf_filtered (", catch location ");
2150 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2151 printf_filtered ("%s:%d",
2152 CURRENT_EXCEPTION_CATCH_FILE
,
2153 CURRENT_EXCEPTION_CATCH_LINE
);
2155 printf_filtered ("unknown");
2157 printf_filtered ("\n");
2158 /* don't bother to print location frame info */
2159 return PRINT_SRC_ONLY
;
2163 /* really catch, some other bpstat will handle it */
2164 return PRINT_UNKNOWN
;
2169 case bp_hardware_watchpoint
:
2170 if (bs
->old_val
!= NULL
)
2172 annotate_watchpoint (bs
->breakpoint_at
->number
);
2173 if (ui_out_is_mi_like_p (uiout
))
2174 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2175 mention (bs
->breakpoint_at
);
2176 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2177 ui_out_text (uiout
, "\nOld value = ");
2178 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2179 ui_out_field_stream (uiout
, "old", stb
);
2180 ui_out_text (uiout
, "\nNew value = ");
2181 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2182 ui_out_field_stream (uiout
, "new", stb
);
2183 do_cleanups (ui_out_chain
);
2184 ui_out_text (uiout
, "\n");
2185 value_free (bs
->old_val
);
2188 /* More than one watchpoint may have been triggered. */
2189 return PRINT_UNKNOWN
;
2192 case bp_read_watchpoint
:
2193 if (ui_out_is_mi_like_p (uiout
))
2194 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2195 mention (bs
->breakpoint_at
);
2196 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2197 ui_out_text (uiout
, "\nValue = ");
2198 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2199 ui_out_field_stream (uiout
, "value", stb
);
2200 do_cleanups (ui_out_chain
);
2201 ui_out_text (uiout
, "\n");
2202 return PRINT_UNKNOWN
;
2205 case bp_access_watchpoint
:
2206 if (bs
->old_val
!= NULL
)
2208 annotate_watchpoint (bs
->breakpoint_at
->number
);
2209 if (ui_out_is_mi_like_p (uiout
))
2210 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2211 mention (bs
->breakpoint_at
);
2212 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2213 ui_out_text (uiout
, "\nOld value = ");
2214 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2215 ui_out_field_stream (uiout
, "old", stb
);
2216 value_free (bs
->old_val
);
2218 ui_out_text (uiout
, "\nNew value = ");
2222 mention (bs
->breakpoint_at
);
2223 if (ui_out_is_mi_like_p (uiout
))
2224 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2225 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2226 ui_out_text (uiout
, "\nValue = ");
2228 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2229 ui_out_field_stream (uiout
, "new", stb
);
2230 do_cleanups (ui_out_chain
);
2231 ui_out_text (uiout
, "\n");
2232 return PRINT_UNKNOWN
;
2235 /* Fall through, we don't deal with these types of breakpoints
2239 if (ui_out_is_mi_like_p (uiout
))
2240 ui_out_field_string (uiout
, "reason", "function-finished");
2241 return PRINT_UNKNOWN
;
2245 if (ui_out_is_mi_like_p (uiout
))
2246 ui_out_field_string (uiout
, "reason", "location-reached");
2247 return PRINT_UNKNOWN
;
2252 case bp_longjmp_resume
:
2253 case bp_step_resume
:
2254 case bp_through_sigtramp
:
2255 case bp_watchpoint_scope
:
2258 return PRINT_UNKNOWN
;
2262 /* Generic routine for printing messages indicating why we
2263 stopped. The behavior of this function depends on the value
2264 'print_it' in the bpstat structure. Under some circumstances we
2265 may decide not to print anything here and delegate the task to
2268 static enum print_stop_action
2269 print_bp_stop_message (bpstat bs
)
2271 switch (bs
->print_it
)
2274 /* Nothing should be printed for this bpstat entry. */
2275 return PRINT_UNKNOWN
;
2279 /* We still want to print the frame, but we already printed the
2280 relevant messages. */
2281 return PRINT_SRC_AND_LOC
;
2284 case print_it_normal
:
2285 /* Normal case. Call the breakpoint's print_it method, or
2286 print_it_typical. */
2287 if (bs
->breakpoint_at
!= NULL
&& bs
->breakpoint_at
->ops
!= NULL
2288 && bs
->breakpoint_at
->ops
->print_it
!= NULL
)
2289 return bs
->breakpoint_at
->ops
->print_it (bs
->breakpoint_at
);
2291 return print_it_typical (bs
);
2295 internal_error (__FILE__
, __LINE__
,
2296 "print_bp_stop_message: unrecognized enum value");
2301 /* Print a message indicating what happened. This is called from
2302 normal_stop(). The input to this routine is the head of the bpstat
2303 list - a list of the eventpoints that caused this stop. This
2304 routine calls the generic print routine for printing a message
2305 about reasons for stopping. This will print (for example) the
2306 "Breakpoint n," part of the output. The return value of this
2309 PRINT_UNKNOWN: Means we printed nothing
2310 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2311 code to print the location. An example is
2312 "Breakpoint 1, " which should be followed by
2314 PRINT_SRC_ONLY: Means we printed something, but there is no need
2315 to also print the location part of the message.
2316 An example is the catch/throw messages, which
2317 don't require a location appended to the end.
2318 PRINT_NOTHING: We have done some printing and we don't need any
2319 further info to be printed.*/
2321 enum print_stop_action
2322 bpstat_print (bpstat bs
)
2326 /* Maybe another breakpoint in the chain caused us to stop.
2327 (Currently all watchpoints go on the bpstat whether hit or not.
2328 That probably could (should) be changed, provided care is taken
2329 with respect to bpstat_explains_signal). */
2330 for (; bs
; bs
= bs
->next
)
2332 val
= print_bp_stop_message (bs
);
2333 if (val
== PRINT_SRC_ONLY
2334 || val
== PRINT_SRC_AND_LOC
2335 || val
== PRINT_NOTHING
)
2339 /* We reached the end of the chain, or we got a null BS to start
2340 with and nothing was printed. */
2341 return PRINT_UNKNOWN
;
2344 /* Evaluate the expression EXP and return 1 if value is zero.
2345 This is used inside a catch_errors to evaluate the breakpoint condition.
2346 The argument is a "struct expression *" that has been cast to char * to
2347 make it pass through catch_errors. */
2350 breakpoint_cond_eval (void *exp
)
2352 struct value
*mark
= value_mark ();
2353 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2354 value_free_to_mark (mark
);
2358 /* Allocate a new bpstat and chain it to the current one. */
2361 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2365 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2367 bs
->breakpoint_at
= b
;
2368 /* If the condition is false, etc., don't do the commands. */
2369 bs
->commands
= NULL
;
2371 bs
->print_it
= print_it_normal
;
2375 /* Possible return values for watchpoint_check (this can't be an enum
2376 because of check_errors). */
2377 /* The watchpoint has been deleted. */
2378 #define WP_DELETED 1
2379 /* The value has changed. */
2380 #define WP_VALUE_CHANGED 2
2381 /* The value has not changed. */
2382 #define WP_VALUE_NOT_CHANGED 3
2384 #define BP_TEMPFLAG 1
2385 #define BP_HARDWAREFLAG 2
2387 /* Check watchpoint condition. */
2390 watchpoint_check (void *p
)
2392 bpstat bs
= (bpstat
) p
;
2393 struct breakpoint
*b
;
2394 struct frame_info
*fr
;
2395 int within_current_scope
;
2397 struct frame_id current_frame_id
;
2400 b
= bs
->breakpoint_at
;
2402 if (b
->exp_valid_block
== NULL
)
2403 within_current_scope
= 1;
2406 /* There is no current frame at this moment. If we're going to have
2407 any chance of handling watchpoints on local variables, we'll need
2408 the frame chain (so we can determine if we're in scope). */
2409 reinit_frame_cache ();
2410 fr
= frame_find_by_id (b
->watchpoint_frame
);
2412 current_frame_id
= get_frame_id (get_current_frame ());
2413 within_current_scope
= frame_id_eq (current_frame_id
, b
->watchpoint_frame
)
2414 || frame_id_inner (current_frame_id
,
2415 b
->watchpoint_frame
);
2417 within_current_scope
= (fr
!= NULL
);
2419 /* in_function_epilogue_p() returns a non-zero value if we're still
2420 in the function but the stack frame has already been invalidated.
2421 Since we can't rely on the values of local variables after the
2422 stack has been destroyed, we are treating the watchpoint in that
2423 state as `not changed' without further checking. */
2425 if (within_current_scope
&& (!fr
|| fr
== get_current_frame ())
2427 if ((!within_current_scope
|| fr
== get_current_frame ())
2429 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2430 return WP_VALUE_NOT_CHANGED
;
2431 if (fr
&& within_current_scope
)
2432 /* If we end up stopping, the current frame will get selected
2433 in normal_stop. So this call to select_frame won't affect
2438 if (within_current_scope
)
2440 /* We use value_{,free_to_}mark because it could be a
2441 *long* time before we return to the command level and
2442 call free_all_values. We can't call free_all_values because
2443 we might be in the middle of evaluating a function call. */
2445 struct value
*mark
= value_mark ();
2446 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2447 if (!value_equal (b
->val
, new_val
))
2449 release_value (new_val
);
2450 value_free_to_mark (mark
);
2451 bs
->old_val
= b
->val
;
2453 /* We will stop here */
2454 return WP_VALUE_CHANGED
;
2458 /* Nothing changed, don't do anything. */
2459 value_free_to_mark (mark
);
2460 /* We won't stop here */
2461 return WP_VALUE_NOT_CHANGED
;
2466 /* This seems like the only logical thing to do because
2467 if we temporarily ignored the watchpoint, then when
2468 we reenter the block in which it is valid it contains
2469 garbage (in the case of a function, it may have two
2470 garbage values, one before and one after the prologue).
2471 So we can't even detect the first assignment to it and
2472 watch after that (since the garbage may or may not equal
2473 the first value assigned). */
2474 /* We print all the stop information in print_it_typical(), but
2475 in this case, by the time we call print_it_typical() this bp
2476 will be deleted already. So we have no choice but print the
2477 information here. */
2478 if (ui_out_is_mi_like_p (uiout
))
2479 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2480 ui_out_text (uiout
, "\nWatchpoint ");
2481 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2482 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2483 which its expression is valid.\n");
2485 if (b
->related_breakpoint
)
2486 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2487 b
->disposition
= disp_del_at_next_stop
;
2493 /* Get a bpstat associated with having just stopped at address *PC
2494 and frame address CORE_ADDRESS. Update *PC to point at the
2495 breakpoint (if we hit a breakpoint). NOT_A_SW_BREAKPOINT is nonzero
2496 if this is known to not be a real breakpoint (it could still be a
2497 watchpoint, though). */
2499 /* Determine whether we stopped at a breakpoint, etc, or whether we
2500 don't understand this stop. Result is a chain of bpstat's such that:
2502 if we don't understand the stop, the result is a null pointer.
2504 if we understand why we stopped, the result is not null.
2506 Each element of the chain refers to a particular breakpoint or
2507 watchpoint at which we have stopped. (We may have stopped for
2508 several reasons concurrently.)
2510 Each element of the chain has valid next, breakpoint_at,
2511 commands, FIXME??? fields. */
2514 bpstat_stop_status (CORE_ADDR
*pc
, int not_a_sw_breakpoint
)
2516 register struct breakpoint
*b
, *temp
;
2518 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2519 int real_breakpoint
= 0;
2520 /* Root of the chain of bpstat's */
2521 struct bpstats root_bs
[1];
2522 /* Pointer to the last thing in the chain currently. */
2523 bpstat bs
= root_bs
;
2525 /* Get the address where the breakpoint would have been. The
2526 "not_a_sw_breakpoint" argument is meant to distinguish between a
2527 breakpoint trap event and a trace/singlestep trap event. For a
2528 trace/singlestep trap event, we would not want to subtract
2529 DECR_PC_AFTER_BREAK from the PC. */
2531 bp_addr
= *pc
- (not_a_sw_breakpoint
? 0 : DECR_PC_AFTER_BREAK
);
2533 ALL_BREAKPOINTS_SAFE (b
, temp
)
2535 if (b
->enable_state
== bp_disabled
2536 || b
->enable_state
== bp_shlib_disabled
2537 || b
->enable_state
== bp_call_disabled
)
2540 if (b
->type
!= bp_watchpoint
2541 && b
->type
!= bp_hardware_watchpoint
2542 && b
->type
!= bp_read_watchpoint
2543 && b
->type
!= bp_access_watchpoint
2544 && b
->type
!= bp_hardware_breakpoint
2545 && b
->type
!= bp_catch_fork
2546 && b
->type
!= bp_catch_vfork
2547 && b
->type
!= bp_catch_exec
2548 && b
->type
!= bp_catch_catch
2549 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2551 if (b
->address
!= bp_addr
) /* address doesn't match */
2553 if (overlay_debugging
/* unmapped overlay section */
2554 && section_is_overlay (b
->section
)
2555 && !section_is_mapped (b
->section
))
2559 if (b
->type
== bp_hardware_breakpoint
)
2561 if (b
->address
!= (*pc
- DECR_PC_AFTER_HW_BREAK
))
2563 if (overlay_debugging
/* unmapped overlay section */
2564 && section_is_overlay (b
->section
)
2565 && !section_is_mapped (b
->section
))
2569 /* Is this a catchpoint of a load or unload? If so, did we
2570 get a load or unload of the specified library? If not,
2572 if ((b
->type
== bp_catch_load
)
2573 #if defined(SOLIB_HAVE_LOAD_EVENT)
2574 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2575 || ((b
->dll_pathname
!= NULL
)
2576 && (strcmp (b
->dll_pathname
,
2577 SOLIB_LOADED_LIBRARY_PATHNAME (
2578 PIDGET (inferior_ptid
)))
2584 if ((b
->type
== bp_catch_unload
)
2585 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2586 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2587 || ((b
->dll_pathname
!= NULL
)
2588 && (strcmp (b
->dll_pathname
,
2589 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2590 PIDGET (inferior_ptid
)))
2596 if ((b
->type
== bp_catch_fork
)
2597 && !inferior_has_forked (PIDGET (inferior_ptid
),
2598 &b
->forked_inferior_pid
))
2601 if ((b
->type
== bp_catch_vfork
)
2602 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2603 &b
->forked_inferior_pid
))
2606 if ((b
->type
== bp_catch_exec
)
2607 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2610 if (ep_is_exception_catchpoint (b
) &&
2611 !(current_exception_event
= target_get_current_exception_event ()))
2614 /* Come here if it's a watchpoint, or if the break address matches */
2616 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2618 /* Watchpoints may change this, if not found to have triggered. */
2622 if (b
->type
== bp_watchpoint
||
2623 b
->type
== bp_hardware_watchpoint
)
2625 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2627 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2628 int e
= catch_errors (watchpoint_check
, bs
, message
,
2630 do_cleanups (cleanups
);
2634 /* We've already printed what needs to be printed. */
2635 /* Actually this is superfluous, because by the time we
2636 call print_it_typical() the wp will be already deleted,
2637 and the function will return immediately. */
2638 bs
->print_it
= print_it_done
;
2641 case WP_VALUE_CHANGED
:
2645 case WP_VALUE_NOT_CHANGED
:
2647 bs
->print_it
= print_it_noop
;
2654 /* Error from catch_errors. */
2655 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2656 if (b
->related_breakpoint
)
2657 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2658 b
->disposition
= disp_del_at_next_stop
;
2659 /* We've already printed what needs to be printed. */
2660 bs
->print_it
= print_it_done
;
2666 else if (b
->type
== bp_read_watchpoint
||
2667 b
->type
== bp_access_watchpoint
)
2673 addr
= target_stopped_data_address ();
2676 for (v
= b
->val_chain
; v
; v
= v
->next
)
2678 if (VALUE_LVAL (v
) == lval_memory
2679 && ! VALUE_LAZY (v
))
2681 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
2683 if (v
== b
->val_chain
2684 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2685 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2689 vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
2690 /* Exact match not required. Within range is
2692 if (addr
>= vaddr
&&
2693 addr
< vaddr
+ TYPE_LENGTH (VALUE_TYPE (v
)))
2700 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2702 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2703 int e
= catch_errors (watchpoint_check
, bs
, message
,
2705 do_cleanups (cleanups
);
2709 /* We've already printed what needs to be printed. */
2710 bs
->print_it
= print_it_done
;
2713 case WP_VALUE_CHANGED
:
2714 if (b
->type
== bp_read_watchpoint
)
2716 /* Don't stop: read watchpoints shouldn't fire if
2717 the value has changed. This is for targets
2718 which cannot set read-only watchpoints. */
2719 bs
->print_it
= print_it_noop
;
2725 case WP_VALUE_NOT_CHANGED
:
2732 /* Error from catch_errors. */
2733 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2734 if (b
->related_breakpoint
)
2735 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2736 b
->disposition
= disp_del_at_next_stop
;
2737 /* We've already printed what needs to be printed. */
2738 bs
->print_it
= print_it_done
;
2742 else /* found == 0 */
2744 /* This is a case where some watchpoint(s) triggered,
2745 but not at the address of this watchpoint (FOUND
2746 was left zero). So don't print anything for this
2748 bs
->print_it
= print_it_noop
;
2755 /* By definition, an encountered breakpoint is a triggered
2759 real_breakpoint
= 1;
2762 if (frame_id_p (b
->frame_id
)
2763 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2767 int value_is_zero
= 0;
2771 /* Need to select the frame, with all that implies
2772 so that the conditions will have the right context. */
2773 select_frame (get_current_frame ());
2775 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2776 "Error in testing breakpoint condition:\n",
2778 /* FIXME-someday, should give breakpoint # */
2781 if (b
->cond
&& value_is_zero
)
2784 /* Don't consider this a hit. */
2787 else if (b
->ignore_count
> 0)
2790 annotate_ignore_count_change ();
2795 /* We will stop here */
2796 if (b
->disposition
== disp_disable
)
2797 b
->enable_state
= bp_disabled
;
2800 bs
->commands
= b
->commands
;
2802 (STREQ ("silent", bs
->commands
->line
) ||
2803 (xdb_commands
&& STREQ ("Q", bs
->commands
->line
))))
2805 bs
->commands
= bs
->commands
->next
;
2808 bs
->commands
= copy_command_lines (bs
->commands
);
2811 /* Print nothing for this entry if we dont stop or if we dont print. */
2812 if (bs
->stop
== 0 || bs
->print
== 0)
2813 bs
->print_it
= print_it_noop
;
2816 bs
->next
= NULL
; /* Terminate the chain */
2817 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2819 if (real_breakpoint
&& bs
)
2821 if (bs
->breakpoint_at
->type
== bp_hardware_breakpoint
)
2823 if (DECR_PC_AFTER_HW_BREAK
!= 0)
2825 *pc
= *pc
- DECR_PC_AFTER_HW_BREAK
;
2831 if (DECR_PC_AFTER_BREAK
!= 0 || must_shift_inst_regs
)
2834 #if defined (SHIFT_INST_REGS)
2836 #else /* No SHIFT_INST_REGS. */
2838 #endif /* No SHIFT_INST_REGS. */
2843 /* The value of a hardware watchpoint hasn't changed, but the
2844 intermediate memory locations we are watching may have. */
2845 if (bs
&& !bs
->stop
&&
2846 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2847 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2848 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2850 remove_breakpoints ();
2851 insert_breakpoints ();
2856 /* Tell what to do about this bpstat. */
2858 bpstat_what (bpstat bs
)
2860 /* Classify each bpstat as one of the following. */
2863 /* This bpstat element has no effect on the main_action. */
2866 /* There was a watchpoint, stop but don't print. */
2869 /* There was a watchpoint, stop and print. */
2872 /* There was a breakpoint but we're not stopping. */
2875 /* There was a breakpoint, stop but don't print. */
2878 /* There was a breakpoint, stop and print. */
2881 /* We hit the longjmp breakpoint. */
2884 /* We hit the longjmp_resume breakpoint. */
2887 /* We hit the step_resume breakpoint. */
2890 /* We hit the through_sigtramp breakpoint. */
2893 /* We hit the shared library event breakpoint. */
2896 /* We caught a shared library event. */
2899 /* This is just used to count how many enums there are. */
2903 /* Here is the table which drives this routine. So that we can
2904 format it pretty, we define some abbreviations for the
2905 enum bpstat_what codes. */
2906 #define kc BPSTAT_WHAT_KEEP_CHECKING
2907 #define ss BPSTAT_WHAT_STOP_SILENT
2908 #define sn BPSTAT_WHAT_STOP_NOISY
2909 #define sgl BPSTAT_WHAT_SINGLE
2910 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2911 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2912 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2913 #define sr BPSTAT_WHAT_STEP_RESUME
2914 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2915 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2916 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2918 /* "Can't happen." Might want to print an error message.
2919 abort() is not out of the question, but chances are GDB is just
2920 a bit confused, not unusable. */
2921 #define err BPSTAT_WHAT_STOP_NOISY
2923 /* Given an old action and a class, come up with a new action. */
2924 /* One interesting property of this table is that wp_silent is the same
2925 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2926 after stopping, the check for whether to step over a breakpoint
2927 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2928 reference to how we stopped. We retain separate wp_silent and
2929 bp_silent codes in case we want to change that someday.
2931 Another possibly interesting property of this table is that
2932 there's a partial ordering, priority-like, of the actions. Once
2933 you've decided that some action is appropriate, you'll never go
2934 back and decide something of a lower priority is better. The
2937 kc < clr sgl shl shlr slr sn sr ss ts
2938 sgl < clrs shl shlr slr sn sr ss ts
2939 slr < err shl shlr sn sr ss ts
2940 clr < clrs err shl shlr sn sr ss ts
2941 clrs < err shl shlr sn sr ss ts
2942 ss < shl shlr sn sr ts
2949 What I think this means is that we don't need a damned table
2950 here. If you just put the rows and columns in the right order,
2951 it'd look awfully regular. We could simply walk the bpstat list
2952 and choose the highest priority action we find, with a little
2953 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2954 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2955 is messy anyway). */
2957 /* step_resume entries: a step resume breakpoint overrides another
2958 breakpoint of signal handling (see comment in wait_for_inferior
2959 at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
2960 /* We handle the through_sigtramp_breakpoint the same way; having both
2961 one of those and a step_resume_breakpoint is probably very rare (?). */
2963 static const enum bpstat_what_main_action
2964 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
2967 /* kc ss sn sgl slr clr clrs sr ts shl shlr
2970 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
2972 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
2974 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
2976 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
2978 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
2980 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
2982 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
2984 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
2986 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
2988 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
2990 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
2992 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
3007 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3008 struct bpstat_what retval
;
3010 retval
.call_dummy
= 0;
3011 for (; bs
!= NULL
; bs
= bs
->next
)
3013 enum class bs_class
= no_effect
;
3014 if (bs
->breakpoint_at
== NULL
)
3015 /* I suspect this can happen if it was a momentary breakpoint
3016 which has since been deleted. */
3018 switch (bs
->breakpoint_at
->type
)
3024 case bp_hardware_breakpoint
:
3030 bs_class
= bp_noisy
;
3032 bs_class
= bp_silent
;
3035 bs_class
= bp_nostop
;
3038 case bp_hardware_watchpoint
:
3039 case bp_read_watchpoint
:
3040 case bp_access_watchpoint
:
3044 bs_class
= wp_noisy
;
3046 bs_class
= wp_silent
;
3049 /* There was a watchpoint, but we're not stopping.
3050 This requires no further action. */
3051 bs_class
= no_effect
;
3054 bs_class
= long_jump
;
3056 case bp_longjmp_resume
:
3057 bs_class
= long_resume
;
3059 case bp_step_resume
:
3062 bs_class
= step_resume
;
3065 /* It is for the wrong frame. */
3066 bs_class
= bp_nostop
;
3068 case bp_through_sigtramp
:
3069 bs_class
= through_sig
;
3071 case bp_watchpoint_scope
:
3072 bs_class
= bp_nostop
;
3074 case bp_shlib_event
:
3075 bs_class
= shlib_event
;
3077 case bp_thread_event
:
3078 case bp_overlay_event
:
3079 bs_class
= bp_nostop
;
3082 case bp_catch_unload
:
3083 /* Only if this catchpoint triggered should we cause the
3084 step-out-of-dld behaviour. Otherwise, we ignore this
3087 bs_class
= catch_shlib_event
;
3089 bs_class
= no_effect
;
3092 case bp_catch_vfork
:
3097 bs_class
= bp_noisy
;
3099 bs_class
= bp_silent
;
3102 /* There was a catchpoint, but we're not stopping.
3103 This requires no further action. */
3104 bs_class
= no_effect
;
3106 case bp_catch_catch
:
3107 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3108 bs_class
= bp_nostop
;
3110 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3112 case bp_catch_throw
:
3113 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3114 bs_class
= bp_nostop
;
3116 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3119 /* Make sure the action is stop (silent or noisy),
3120 so infrun.c pops the dummy frame. */
3121 bs_class
= bp_silent
;
3122 retval
.call_dummy
= 1;
3125 current_action
= table
[(int) bs_class
][(int) current_action
];
3127 retval
.main_action
= current_action
;
3131 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3132 without hardware support). This isn't related to a specific bpstat,
3133 just to things like whether watchpoints are set. */
3136 bpstat_should_step (void)
3138 struct breakpoint
*b
;
3140 if (b
->enable_state
== bp_enabled
&& b
->type
== bp_watchpoint
)
3145 /* Nonzero if there are enabled hardware watchpoints. */
3147 bpstat_have_active_hw_watchpoints (void)
3149 struct breakpoint
*b
;
3151 if ((b
->enable_state
== bp_enabled
) &&
3153 ((b
->type
== bp_hardware_watchpoint
) ||
3154 (b
->type
== bp_read_watchpoint
) ||
3155 (b
->type
== bp_access_watchpoint
)))
3161 /* Given a bpstat that records zero or more triggered eventpoints, this
3162 function returns another bpstat which contains only the catchpoints
3163 on that first list, if any. */
3165 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3167 struct bpstats root_bs
[1];
3168 bpstat bs
= root_bs
;
3169 struct breakpoint
*ep
;
3172 bpstat_clear (cp_list
);
3173 root_bs
->next
= NULL
;
3175 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3177 /* Is this eventpoint a catchpoint? If not, ignore it. */
3178 ep
= ep_list
->breakpoint_at
;
3181 if ((ep
->type
!= bp_catch_load
) &&
3182 (ep
->type
!= bp_catch_unload
) &&
3183 (ep
->type
!= bp_catch_catch
) &&
3184 (ep
->type
!= bp_catch_throw
))
3185 /* pai: (temp) ADD fork/vfork here!! */
3188 /* Yes; add it to the list. */
3189 bs
= bpstat_alloc (ep
, bs
);
3194 #if defined(SOLIB_ADD)
3195 /* Also, for each triggered catchpoint, tag it with the name of
3196 the library that caused this trigger. (We copy the name now,
3197 because it's only guaranteed to be available NOW, when the
3198 catchpoint triggers. Clients who may wish to know the name
3199 later must get it from the catchpoint itself.) */
3200 if (ep
->triggered_dll_pathname
!= NULL
)
3201 xfree (ep
->triggered_dll_pathname
);
3202 if (ep
->type
== bp_catch_load
)
3203 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3204 PIDGET (inferior_ptid
));
3206 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3207 PIDGET (inferior_ptid
));
3209 dll_pathname
= NULL
;
3213 ep
->triggered_dll_pathname
= (char *)
3214 xmalloc (strlen (dll_pathname
) + 1);
3215 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3218 ep
->triggered_dll_pathname
= NULL
;
3224 /* Print B to gdb_stdout. */
3226 print_one_breakpoint (struct breakpoint
*b
,
3227 CORE_ADDR
*last_addr
)
3229 register struct command_line
*l
;
3230 register struct symbol
*sym
;
3231 struct ep_type_description
3236 static struct ep_type_description bptypes
[] =
3238 {bp_none
, "?deleted?"},
3239 {bp_breakpoint
, "breakpoint"},
3240 {bp_hardware_breakpoint
, "hw breakpoint"},
3241 {bp_until
, "until"},
3242 {bp_finish
, "finish"},
3243 {bp_watchpoint
, "watchpoint"},
3244 {bp_hardware_watchpoint
, "hw watchpoint"},
3245 {bp_read_watchpoint
, "read watchpoint"},
3246 {bp_access_watchpoint
, "acc watchpoint"},
3247 {bp_longjmp
, "longjmp"},
3248 {bp_longjmp_resume
, "longjmp resume"},
3249 {bp_step_resume
, "step resume"},
3250 {bp_through_sigtramp
, "sigtramp"},
3251 {bp_watchpoint_scope
, "watchpoint scope"},
3252 {bp_call_dummy
, "call dummy"},
3253 {bp_shlib_event
, "shlib events"},
3254 {bp_thread_event
, "thread events"},
3255 {bp_overlay_event
, "overlay events"},
3256 {bp_catch_load
, "catch load"},
3257 {bp_catch_unload
, "catch unload"},
3258 {bp_catch_fork
, "catch fork"},
3259 {bp_catch_vfork
, "catch vfork"},
3260 {bp_catch_exec
, "catch exec"},
3261 {bp_catch_catch
, "catch catch"},
3262 {bp_catch_throw
, "catch throw"}
3265 static char *bpdisps
[] =
3266 {"del", "dstp", "dis", "keep"};
3267 static char bpenables
[] = "nynny";
3268 char wrap_indent
[80];
3269 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3270 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3271 struct cleanup
*bkpt_chain
;
3274 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3278 ui_out_field_int (uiout
, "number", b
->number
);
3282 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3283 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3284 internal_error (__FILE__
, __LINE__
,
3285 "bptypes table does not describe type #%d.",
3287 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3291 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3295 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3296 ui_out_spaces (uiout
, 2);
3299 strcpy (wrap_indent
, " ");
3302 if (TARGET_ADDR_BIT
<= 32)
3303 strcat (wrap_indent
, " ");
3305 strcat (wrap_indent
, " ");
3308 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3309 b
->ops
->print_one (b
, last_addr
);
3314 internal_error (__FILE__
, __LINE__
,
3315 "print_one_breakpoint: bp_none encountered\n");
3319 case bp_hardware_watchpoint
:
3320 case bp_read_watchpoint
:
3321 case bp_access_watchpoint
:
3322 /* Field 4, the address, is omitted (which makes the columns
3323 not line up too nicely with the headers, but the effect
3324 is relatively readable). */
3326 ui_out_field_skip (uiout
, "addr");
3328 print_expression (b
->exp
, stb
->stream
);
3329 ui_out_field_stream (uiout
, "what", stb
);
3333 case bp_catch_unload
:
3334 /* Field 4, the address, is omitted (which makes the columns
3335 not line up too nicely with the headers, but the effect
3336 is relatively readable). */
3338 ui_out_field_skip (uiout
, "addr");
3340 if (b
->dll_pathname
== NULL
)
3342 ui_out_field_string (uiout
, "what", "<any library>");
3343 ui_out_spaces (uiout
, 1);
3347 ui_out_text (uiout
, "library \"");
3348 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3349 ui_out_text (uiout
, "\" ");
3354 case bp_catch_vfork
:
3355 /* Field 4, the address, is omitted (which makes the columns
3356 not line up too nicely with the headers, but the effect
3357 is relatively readable). */
3359 ui_out_field_skip (uiout
, "addr");
3361 if (b
->forked_inferior_pid
!= 0)
3363 ui_out_text (uiout
, "process ");
3364 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3365 ui_out_spaces (uiout
, 1);
3369 /* Field 4, the address, is omitted (which makes the columns
3370 not line up too nicely with the headers, but the effect
3371 is relatively readable). */
3373 ui_out_field_skip (uiout
, "addr");
3375 if (b
->exec_pathname
!= NULL
)
3377 ui_out_text (uiout
, "program \"");
3378 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3379 ui_out_text (uiout
, "\" ");
3383 case bp_catch_catch
:
3384 /* Field 4, the address, is omitted (which makes the columns
3385 not line up too nicely with the headers, but the effect
3386 is relatively readable). */
3388 ui_out_field_skip (uiout
, "addr");
3390 ui_out_field_string (uiout
, "what", "exception catch");
3391 ui_out_spaces (uiout
, 1);
3394 case bp_catch_throw
:
3395 /* Field 4, the address, is omitted (which makes the columns
3396 not line up too nicely with the headers, but the effect
3397 is relatively readable). */
3399 ui_out_field_skip (uiout
, "addr");
3401 ui_out_field_string (uiout
, "what", "exception throw");
3402 ui_out_spaces (uiout
, 1);
3406 case bp_hardware_breakpoint
:
3410 case bp_longjmp_resume
:
3411 case bp_step_resume
:
3412 case bp_through_sigtramp
:
3413 case bp_watchpoint_scope
:
3415 case bp_shlib_event
:
3416 case bp_thread_event
:
3417 case bp_overlay_event
:
3421 ui_out_field_core_addr (uiout
, "addr", b
->address
);
3424 *last_addr
= b
->address
;
3427 sym
= find_pc_sect_function (b
->address
, b
->section
);
3430 ui_out_text (uiout
, "in ");
3431 ui_out_field_string (uiout
, "func",
3432 SYMBOL_PRINT_NAME (sym
));
3433 ui_out_wrap_hint (uiout
, wrap_indent
);
3434 ui_out_text (uiout
, " at ");
3436 ui_out_field_string (uiout
, "file", b
->source_file
);
3437 ui_out_text (uiout
, ":");
3438 ui_out_field_int (uiout
, "line", b
->line_number
);
3442 print_address_symbolic (b
->address
, stb
->stream
, demangle
, "");
3443 ui_out_field_stream (uiout
, "at", stb
);
3448 if (b
->thread
!= -1)
3450 /* FIXME: This seems to be redundant and lost here; see the
3451 "stop only in" line a little further down. */
3452 ui_out_text (uiout
, " thread ");
3453 ui_out_field_int (uiout
, "thread", b
->thread
);
3456 ui_out_text (uiout
, "\n");
3458 if (frame_id_p (b
->frame_id
))
3461 ui_out_text (uiout
, "\tstop only in stack frame at ");
3462 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3464 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3465 ui_out_text (uiout
, "\n");
3471 ui_out_text (uiout
, "\tstop only if ");
3472 print_expression (b
->cond
, stb
->stream
);
3473 ui_out_field_stream (uiout
, "cond", stb
);
3474 ui_out_text (uiout
, "\n");
3477 if (b
->thread
!= -1)
3479 /* FIXME should make an annotation for this */
3480 ui_out_text (uiout
, "\tstop only in thread ");
3481 ui_out_field_int (uiout
, "thread", b
->thread
);
3482 ui_out_text (uiout
, "\n");
3485 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3487 /* FIXME should make an annotation for this */
3488 if (ep_is_catchpoint (b
))
3489 ui_out_text (uiout
, "\tcatchpoint");
3491 ui_out_text (uiout
, "\tbreakpoint");
3492 ui_out_text (uiout
, " already hit ");
3493 ui_out_field_int (uiout
, "times", b
->hit_count
);
3494 if (b
->hit_count
== 1)
3495 ui_out_text (uiout
, " time\n");
3497 ui_out_text (uiout
, " times\n");
3500 /* Output the count also if it is zero, but only if this is
3501 mi. FIXME: Should have a better test for this. */
3502 if (ui_out_is_mi_like_p (uiout
))
3503 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3504 ui_out_field_int (uiout
, "times", b
->hit_count
);
3506 if (b
->ignore_count
)
3509 ui_out_text (uiout
, "\tignore next ");
3510 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3511 ui_out_text (uiout
, " hits\n");
3514 if ((l
= b
->commands
))
3516 struct cleanup
*script_chain
;
3519 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3520 print_command_lines (uiout
, l
, 4);
3521 do_cleanups (script_chain
);
3523 do_cleanups (bkpt_chain
);
3524 do_cleanups (old_chain
);
3527 struct captured_breakpoint_query_args
3533 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3535 struct captured_breakpoint_query_args
*args
= data
;
3536 register struct breakpoint
*b
;
3537 CORE_ADDR dummy_addr
= 0;
3540 if (args
->bnum
== b
->number
)
3542 print_one_breakpoint (b
, &dummy_addr
);
3550 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
)
3552 struct captured_breakpoint_query_args args
;
3554 /* For the moment we don't trust print_one_breakpoint() to not throw
3556 return catch_exceptions (uiout
, do_captured_breakpoint_query
, &args
,
3557 NULL
, RETURN_MASK_ALL
);
3560 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3561 catchpoints, et.al.). */
3564 user_settable_breakpoint (const struct breakpoint
*b
)
3566 return (b
->type
== bp_breakpoint
3567 || b
->type
== bp_catch_load
3568 || b
->type
== bp_catch_unload
3569 || b
->type
== bp_catch_fork
3570 || b
->type
== bp_catch_vfork
3571 || b
->type
== bp_catch_exec
3572 || b
->type
== bp_catch_catch
3573 || b
->type
== bp_catch_throw
3574 || b
->type
== bp_hardware_breakpoint
3575 || b
->type
== bp_watchpoint
3576 || b
->type
== bp_read_watchpoint
3577 || b
->type
== bp_access_watchpoint
3578 || b
->type
== bp_hardware_watchpoint
);
3581 /* Print information on user settable breakpoint (watchpoint, etc)
3582 number BNUM. If BNUM is -1 print all user settable breakpoints.
3583 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3586 breakpoint_1 (int bnum
, int allflag
)
3588 register struct breakpoint
*b
;
3589 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3590 int nr_printable_breakpoints
;
3591 struct cleanup
*bkpttbl_chain
;
3593 /* Compute the number of rows in the table. */
3594 nr_printable_breakpoints
= 0;
3597 || bnum
== b
->number
)
3599 if (allflag
|| user_settable_breakpoint (b
))
3600 nr_printable_breakpoints
++;
3605 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3609 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3612 if (nr_printable_breakpoints
> 0)
3613 annotate_breakpoints_headers ();
3614 if (nr_printable_breakpoints
> 0)
3616 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3617 if (nr_printable_breakpoints
> 0)
3619 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3620 if (nr_printable_breakpoints
> 0)
3622 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3623 if (nr_printable_breakpoints
> 0)
3625 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3628 if (nr_printable_breakpoints
> 0)
3630 if (TARGET_ADDR_BIT
<= 32)
3631 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3633 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3635 if (nr_printable_breakpoints
> 0)
3637 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3638 ui_out_table_body (uiout
);
3639 if (nr_printable_breakpoints
> 0)
3640 annotate_breakpoints_table ();
3644 || bnum
== b
->number
)
3646 /* We only print out user settable breakpoints unless the
3648 if (allflag
|| user_settable_breakpoint (b
))
3649 print_one_breakpoint (b
, &last_addr
);
3652 do_cleanups (bkpttbl_chain
);
3654 if (nr_printable_breakpoints
== 0)
3657 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3659 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3664 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3665 that a comparison of an unsigned with -1 is always false. */
3666 if (last_addr
!= (CORE_ADDR
) -1)
3667 set_next_address (last_addr
);
3670 /* FIXME? Should this be moved up so that it is only called when
3671 there have been breakpoints? */
3672 annotate_breakpoints_table_end ();
3677 breakpoints_info (char *bnum_exp
, int from_tty
)
3682 bnum
= parse_and_eval_long (bnum_exp
);
3684 breakpoint_1 (bnum
, 0);
3689 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3694 bnum
= parse_and_eval_long (bnum_exp
);
3696 breakpoint_1 (bnum
, 1);
3699 /* Print a message describing any breakpoints set at PC. */
3702 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3704 register int others
= 0;
3705 register struct breakpoint
*b
;
3708 if (b
->address
== pc
) /* address match / overlay match */
3709 if (!overlay_debugging
|| b
->section
== section
)
3713 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3715 if (b
->address
== pc
) /* address match / overlay match */
3716 if (!overlay_debugging
|| b
->section
== section
)
3719 printf_filtered ("%d%s%s ",
3721 ((b
->enable_state
== bp_disabled
||
3722 b
->enable_state
== bp_shlib_disabled
||
3723 b
->enable_state
== bp_call_disabled
)
3725 : b
->enable_state
== bp_permanent
3729 : ((others
== 1) ? " and" : ""));
3731 printf_filtered ("also set at pc ");
3732 print_address_numeric (pc
, 1, gdb_stdout
);
3733 printf_filtered (".\n");
3737 /* Set the default place to put a breakpoint
3738 for the `break' command with no arguments. */
3741 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3744 default_breakpoint_valid
= valid
;
3745 default_breakpoint_address
= addr
;
3746 default_breakpoint_symtab
= symtab
;
3747 default_breakpoint_line
= line
;
3750 /* Return true iff it is meaningful to use the address member of
3751 BPT. For some breakpoint types, the address member is irrelevant
3752 and it makes no sense to attempt to compare it to other addresses
3753 (or use it for any other purpose either).
3755 More specifically, each of the following breakpoint types will always
3756 have a zero valued address and we don't want check_duplicates() to mark
3757 breakpoints of any of these types to be a duplicate of an actual
3758 breakpoint at address zero:
3761 bp_hardware_watchpoint
3763 bp_access_watchpoint
3770 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3772 enum bptype type
= bpt
->type
;
3774 return (type
!= bp_watchpoint
3775 && type
!= bp_hardware_watchpoint
3776 && type
!= bp_read_watchpoint
3777 && type
!= bp_access_watchpoint
3778 && type
!= bp_catch_exec
3779 && type
!= bp_longjmp_resume
3780 && type
!= bp_catch_fork
3781 && type
!= bp_catch_vfork
);
3784 /* Rescan breakpoints at the same address and section as BPT,
3785 marking the first one as "first" and any others as "duplicates".
3786 This is so that the bpt instruction is only inserted once.
3787 If we have a permanent breakpoint at the same place as BPT, make
3788 that one the official one, and the rest as duplicates. */
3791 check_duplicates (struct breakpoint
*bpt
)
3793 register struct breakpoint
*b
;
3794 register int count
= 0;
3795 struct breakpoint
*perm_bp
= 0;
3796 CORE_ADDR address
= bpt
->address
;
3797 asection
*section
= bpt
->section
;
3799 if (! breakpoint_address_is_meaningful (bpt
))
3803 if (b
->enable_state
!= bp_disabled
3804 && b
->enable_state
!= bp_shlib_disabled
3805 && b
->enable_state
!= bp_call_disabled
3806 && b
->address
== address
/* address / overlay match */
3807 && (!overlay_debugging
|| b
->section
== section
)
3808 && breakpoint_address_is_meaningful (b
))
3810 /* Have we found a permanent breakpoint? */
3811 if (b
->enable_state
== bp_permanent
)
3818 b
->duplicate
= count
> 1;
3821 /* If we found a permanent breakpoint at this address, go over the
3822 list again and declare all the other breakpoints there to be the
3826 perm_bp
->duplicate
= 0;
3828 /* Permanent breakpoint should always be inserted. */
3829 if (! perm_bp
->inserted
)
3830 internal_error (__FILE__
, __LINE__
,
3831 "allegedly permanent breakpoint is not "
3832 "actually inserted");
3838 internal_error (__FILE__
, __LINE__
,
3839 "another breakpoint was inserted on top of "
3840 "a permanent breakpoint");
3842 if (b
->enable_state
!= bp_disabled
3843 && b
->enable_state
!= bp_shlib_disabled
3844 && b
->enable_state
!= bp_call_disabled
3845 && b
->address
== address
/* address / overlay match */
3846 && (!overlay_debugging
|| b
->section
== section
)
3847 && breakpoint_address_is_meaningful (b
))
3853 /* set_raw_breakpoint() is a low level routine for allocating and
3854 partially initializing a breakpoint of type BPTYPE. The newly
3855 created breakpoint's address, section, source file name, and line
3856 number are provided by SAL. The newly created and partially
3857 initialized breakpoint is added to the breakpoint chain and
3858 is also returned as the value of this function.
3860 It is expected that the caller will complete the initialization of
3861 the newly created breakpoint struct as well as output any status
3862 information regarding the creation of a new breakpoint. In
3863 particular, set_raw_breakpoint() does NOT set the breakpoint
3864 number! Care should be taken to not allow an error() to occur
3865 prior to completing the initialization of the breakpoint. If this
3866 should happen, a bogus breakpoint will be left on the chain. */
3869 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
3871 register struct breakpoint
*b
, *b1
;
3873 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
3874 memset (b
, 0, sizeof (*b
));
3875 b
->address
= sal
.pc
;
3876 if (sal
.symtab
== NULL
)
3877 b
->source_file
= NULL
;
3879 b
->source_file
= savestring (sal
.symtab
->filename
,
3880 strlen (sal
.symtab
->filename
));
3881 b
->section
= sal
.section
;
3883 b
->language
= current_language
->la_language
;
3884 b
->input_radix
= input_radix
;
3886 b
->line_number
= sal
.line
;
3887 b
->enable_state
= bp_enabled
;
3890 b
->ignore_count
= 0;
3892 b
->frame_id
= null_frame_id
;
3893 b
->dll_pathname
= NULL
;
3894 b
->triggered_dll_pathname
= NULL
;
3895 b
->forked_inferior_pid
= 0;
3896 b
->exec_pathname
= NULL
;
3899 /* Add this breakpoint to the end of the chain
3900 so that a list of breakpoints will come out in order
3901 of increasing numbers. */
3903 b1
= breakpoint_chain
;
3905 breakpoint_chain
= b
;
3913 check_duplicates (b
);
3914 breakpoints_changed ();
3920 /* Note that the breakpoint object B describes a permanent breakpoint
3921 instruction, hard-wired into the inferior's code. */
3923 make_breakpoint_permanent (struct breakpoint
*b
)
3925 b
->enable_state
= bp_permanent
;
3927 /* By definition, permanent breakpoints are already present in the code. */
3931 static struct breakpoint
*
3932 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
3934 static int internal_breakpoint_number
= -1;
3935 struct symtab_and_line sal
;
3936 struct breakpoint
*b
;
3938 init_sal (&sal
); /* initialize to zeroes */
3941 sal
.section
= find_pc_overlay (sal
.pc
);
3943 b
= set_raw_breakpoint (sal
, type
);
3944 b
->number
= internal_breakpoint_number
--;
3945 b
->disposition
= disp_donttouch
;
3952 create_longjmp_breakpoint (char *func_name
)
3954 struct breakpoint
*b
;
3955 struct minimal_symbol
*m
;
3957 if (func_name
== NULL
)
3958 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
3961 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
, NULL
)) == NULL
)
3964 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
3967 b
->enable_state
= bp_disabled
;
3970 b
->addr_string
= xstrdup (func_name
);
3973 /* Call this routine when stepping and nexting to enable a breakpoint
3974 if we do a longjmp(). When we hit that breakpoint, call
3975 set_longjmp_resume_breakpoint() to figure out where we are going. */
3978 enable_longjmp_breakpoint (void)
3980 register struct breakpoint
*b
;
3983 if (b
->type
== bp_longjmp
)
3985 b
->enable_state
= bp_enabled
;
3986 check_duplicates (b
);
3991 disable_longjmp_breakpoint (void)
3993 register struct breakpoint
*b
;
3996 if (b
->type
== bp_longjmp
3997 || b
->type
== bp_longjmp_resume
)
3999 b
->enable_state
= bp_disabled
;
4000 check_duplicates (b
);
4005 create_overlay_event_breakpoint (char *func_name
)
4007 struct breakpoint
*b
;
4008 struct minimal_symbol
*m
;
4010 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
, NULL
)) == NULL
)
4013 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4015 b
->addr_string
= xstrdup (func_name
);
4017 if (overlay_debugging
== ovly_auto
)
4019 b
->enable_state
= bp_enabled
;
4020 overlay_events_enabled
= 1;
4024 b
->enable_state
= bp_disabled
;
4025 overlay_events_enabled
= 0;
4030 enable_overlay_breakpoints (void)
4032 register struct breakpoint
*b
;
4035 if (b
->type
== bp_overlay_event
)
4037 b
->enable_state
= bp_enabled
;
4038 check_duplicates (b
);
4039 overlay_events_enabled
= 1;
4044 disable_overlay_breakpoints (void)
4046 register struct breakpoint
*b
;
4049 if (b
->type
== bp_overlay_event
)
4051 b
->enable_state
= bp_disabled
;
4052 check_duplicates (b
);
4053 overlay_events_enabled
= 0;
4058 create_thread_event_breakpoint (CORE_ADDR address
)
4060 struct breakpoint
*b
;
4062 b
= create_internal_breakpoint (address
, bp_thread_event
);
4064 b
->enable_state
= bp_enabled
;
4065 /* addr_string has to be used or breakpoint_re_set will delete me. */
4066 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->address
));
4072 remove_thread_event_breakpoints (void)
4074 struct breakpoint
*b
, *temp
;
4076 ALL_BREAKPOINTS_SAFE (b
, temp
)
4077 if (b
->type
== bp_thread_event
)
4078 delete_breakpoint (b
);
4083 remove_solib_event_breakpoints (void)
4085 register struct breakpoint
*b
, *temp
;
4087 ALL_BREAKPOINTS_SAFE (b
, temp
)
4088 if (b
->type
== bp_shlib_event
)
4089 delete_breakpoint (b
);
4093 create_solib_event_breakpoint (CORE_ADDR address
)
4095 struct breakpoint
*b
;
4097 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4101 /* Disable any breakpoints that are on code in shared libraries. Only
4102 apply to enabled breakpoints, disabled ones can just stay disabled. */
4105 disable_breakpoints_in_shlibs (int silent
)
4107 struct breakpoint
*b
;
4108 int disabled_shlib_breaks
= 0;
4110 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4113 #if defined (PC_SOLIB)
4114 if (((b
->type
== bp_breakpoint
) ||
4115 (b
->type
== bp_hardware_breakpoint
)) &&
4116 b
->enable_state
== bp_enabled
&&
4118 PC_SOLIB (b
->address
))
4120 b
->enable_state
= bp_shlib_disabled
;
4123 if (!disabled_shlib_breaks
)
4125 target_terminal_ours_for_output ();
4126 warning ("Temporarily disabling shared library breakpoints:");
4128 disabled_shlib_breaks
= 1;
4129 warning ("breakpoint #%d ", b
->number
);
4136 /* Try to reenable any breakpoints in shared libraries. */
4138 re_enable_breakpoints_in_shlibs (void)
4140 struct breakpoint
*b
;
4143 if (b
->enable_state
== bp_shlib_disabled
)
4147 /* Do not reenable the breakpoint if the shared library
4148 is still not mapped in. */
4149 if (target_read_memory (b
->address
, buf
, 1) == 0)
4150 b
->enable_state
= bp_enabled
;
4157 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4158 char *cond_string
, enum bptype bp_kind
)
4160 struct breakpoint
*b
;
4161 struct symtabs_and_lines sals
;
4162 struct cleanup
*old_chain
;
4163 struct cleanup
*canonical_strings_chain
= NULL
;
4164 char *addr_start
= hookname
;
4165 char *addr_end
= NULL
;
4166 char **canonical
= (char **) NULL
;
4167 int thread
= -1; /* All threads. */
4169 /* Set a breakpoint on the specified hook. */
4170 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
, 0, &canonical
);
4171 addr_end
= hookname
;
4173 if (sals
.nelts
== 0)
4175 warning ("Unable to set a breakpoint on dynamic linker callback.");
4176 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4177 warning ("GDB will be unable to track shl_load/shl_unload calls");
4180 if (sals
.nelts
!= 1)
4182 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4183 warning ("GDB will be unable to track shl_load/shl_unload calls");
4187 /* Make sure that all storage allocated in decode_line_1 gets freed
4188 in case the following errors out. */
4189 old_chain
= make_cleanup (xfree
, sals
.sals
);
4190 if (canonical
!= (char **) NULL
)
4192 make_cleanup (xfree
, canonical
);
4193 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4194 if (canonical
[0] != NULL
)
4195 make_cleanup (xfree
, canonical
[0]);
4198 resolve_sal_pc (&sals
.sals
[0]);
4200 /* Remove the canonical strings from the cleanup, they are needed below. */
4201 if (canonical
!= (char **) NULL
)
4202 discard_cleanups (canonical_strings_chain
);
4204 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4205 set_breakpoint_count (breakpoint_count
+ 1);
4206 b
->number
= breakpoint_count
;
4208 b
->cond_string
= (cond_string
== NULL
) ?
4209 NULL
: savestring (cond_string
, strlen (cond_string
));
4212 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4213 b
->addr_string
= canonical
[0];
4214 else if (addr_start
)
4215 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4217 b
->enable_state
= bp_enabled
;
4218 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4220 if (dll_pathname
== NULL
)
4221 b
->dll_pathname
= NULL
;
4224 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4225 strcpy (b
->dll_pathname
, dll_pathname
);
4229 do_cleanups (old_chain
);
4233 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4234 char *dll_pathname
, char *cond_string
)
4236 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4237 cond_string
, bp_catch_load
);
4241 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4242 char *dll_pathname
, char *cond_string
)
4244 solib_load_unload_1 (hookname
,tempflag
, dll_pathname
,
4245 cond_string
, bp_catch_unload
);
4249 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4250 enum bptype bp_kind
)
4252 struct symtab_and_line sal
;
4253 struct breakpoint
*b
;
4254 int thread
= -1; /* All threads. */
4261 b
= set_raw_breakpoint (sal
, bp_kind
);
4262 set_breakpoint_count (breakpoint_count
+ 1);
4263 b
->number
= breakpoint_count
;
4265 b
->cond_string
= (cond_string
== NULL
) ?
4266 NULL
: savestring (cond_string
, strlen (cond_string
));
4268 b
->addr_string
= NULL
;
4269 b
->enable_state
= bp_enabled
;
4270 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4271 b
->forked_inferior_pid
= 0;
4277 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4279 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4283 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4285 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4289 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4291 struct symtab_and_line sal
;
4292 struct breakpoint
*b
;
4293 int thread
= -1; /* All threads. */
4300 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4301 set_breakpoint_count (breakpoint_count
+ 1);
4302 b
->number
= breakpoint_count
;
4304 b
->cond_string
= (cond_string
== NULL
) ?
4305 NULL
: savestring (cond_string
, strlen (cond_string
));
4307 b
->addr_string
= NULL
;
4308 b
->enable_state
= bp_enabled
;
4309 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4315 hw_breakpoint_used_count (void)
4317 register struct breakpoint
*b
;
4322 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4330 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4332 register struct breakpoint
*b
;
4335 *other_type_used
= 0;
4338 if (b
->enable_state
== bp_enabled
)
4340 if (b
->type
== type
)
4342 else if ((b
->type
== bp_hardware_watchpoint
||
4343 b
->type
== bp_read_watchpoint
||
4344 b
->type
== bp_access_watchpoint
)
4345 && b
->enable_state
== bp_enabled
)
4346 *other_type_used
= 1;
4352 /* Call this after hitting the longjmp() breakpoint. Use this to set
4353 a new breakpoint at the target of the jmp_buf.
4355 FIXME - This ought to be done by setting a temporary breakpoint
4356 that gets deleted automatically... */
4359 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4361 register struct breakpoint
*b
;
4364 if (b
->type
== bp_longjmp_resume
)
4367 b
->enable_state
= bp_enabled
;
4368 b
->frame_id
= frame_id
;
4369 check_duplicates (b
);
4375 disable_watchpoints_before_interactive_call_start (void)
4377 struct breakpoint
*b
;
4381 if (((b
->type
== bp_watchpoint
)
4382 || (b
->type
== bp_hardware_watchpoint
)
4383 || (b
->type
== bp_read_watchpoint
)
4384 || (b
->type
== bp_access_watchpoint
)
4385 || ep_is_exception_catchpoint (b
))
4386 && (b
->enable_state
== bp_enabled
))
4388 b
->enable_state
= bp_call_disabled
;
4389 check_duplicates (b
);
4395 enable_watchpoints_after_interactive_call_stop (void)
4397 struct breakpoint
*b
;
4401 if (((b
->type
== bp_watchpoint
)
4402 || (b
->type
== bp_hardware_watchpoint
)
4403 || (b
->type
== bp_read_watchpoint
)
4404 || (b
->type
== bp_access_watchpoint
)
4405 || ep_is_exception_catchpoint (b
))
4406 && (b
->enable_state
== bp_call_disabled
))
4408 b
->enable_state
= bp_enabled
;
4409 check_duplicates (b
);
4415 /* Set a breakpoint that will evaporate an end of command
4416 at address specified by SAL.
4417 Restrict it to frame FRAME if FRAME is nonzero. */
4420 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4423 register struct breakpoint
*b
;
4424 b
= set_raw_breakpoint (sal
, type
);
4425 b
->enable_state
= bp_enabled
;
4426 b
->disposition
= disp_donttouch
;
4427 b
->frame_id
= frame_id
;
4429 /* If we're debugging a multi-threaded program, then we
4430 want momentary breakpoints to be active in only a
4431 single thread of control. */
4432 if (in_thread_list (inferior_ptid
))
4433 b
->thread
= pid_to_thread_id (inferior_ptid
);
4439 /* Tell the user we have just set a breakpoint B. */
4442 mention (struct breakpoint
*b
)
4445 struct cleanup
*old_chain
, *ui_out_chain
;
4446 struct ui_stream
*stb
;
4448 stb
= ui_out_stream_new (uiout
);
4449 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4451 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4452 watchpoint) other than breakpoint creation. It should be possible to
4453 clean this up and at the same time replace the random calls to
4454 breakpoint_changed with this hook, as has already been done for
4455 delete_breakpoint_hook and so on. */
4456 if (create_breakpoint_hook
)
4457 create_breakpoint_hook (b
);
4458 breakpoint_create_event (b
->number
);
4460 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4461 b
->ops
->print_mention (b
);
4466 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4469 ui_out_text (uiout
, "Watchpoint ");
4470 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4471 ui_out_field_int (uiout
, "number", b
->number
);
4472 ui_out_text (uiout
, ": ");
4473 print_expression (b
->exp
, stb
->stream
);
4474 ui_out_field_stream (uiout
, "exp", stb
);
4475 do_cleanups (ui_out_chain
);
4477 case bp_hardware_watchpoint
:
4478 ui_out_text (uiout
, "Hardware watchpoint ");
4479 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4480 ui_out_field_int (uiout
, "number", b
->number
);
4481 ui_out_text (uiout
, ": ");
4482 print_expression (b
->exp
, stb
->stream
);
4483 ui_out_field_stream (uiout
, "exp", stb
);
4484 do_cleanups (ui_out_chain
);
4486 case bp_read_watchpoint
:
4487 ui_out_text (uiout
, "Hardware read watchpoint ");
4488 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4489 ui_out_field_int (uiout
, "number", b
->number
);
4490 ui_out_text (uiout
, ": ");
4491 print_expression (b
->exp
, stb
->stream
);
4492 ui_out_field_stream (uiout
, "exp", stb
);
4493 do_cleanups (ui_out_chain
);
4495 case bp_access_watchpoint
:
4496 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4497 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4498 ui_out_field_int (uiout
, "number", b
->number
);
4499 ui_out_text (uiout
, ": ");
4500 print_expression (b
->exp
, stb
->stream
);
4501 ui_out_field_stream (uiout
, "exp", stb
);
4502 do_cleanups (ui_out_chain
);
4505 if (ui_out_is_mi_like_p (uiout
))
4510 printf_filtered ("Breakpoint %d", b
->number
);
4513 case bp_hardware_breakpoint
:
4514 if (ui_out_is_mi_like_p (uiout
))
4519 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4523 case bp_catch_unload
:
4524 printf_filtered ("Catchpoint %d (%s %s)",
4526 (b
->type
== bp_catch_load
) ? "load" : "unload",
4527 (b
->dll_pathname
!= NULL
) ?
4528 b
->dll_pathname
: "<any library>");
4531 case bp_catch_vfork
:
4532 printf_filtered ("Catchpoint %d (%s)",
4534 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4537 printf_filtered ("Catchpoint %d (exec)",
4540 case bp_catch_catch
:
4541 case bp_catch_throw
:
4542 printf_filtered ("Catchpoint %d (%s)",
4544 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4550 case bp_longjmp_resume
:
4551 case bp_step_resume
:
4552 case bp_through_sigtramp
:
4554 case bp_watchpoint_scope
:
4555 case bp_shlib_event
:
4556 case bp_thread_event
:
4557 case bp_overlay_event
:
4563 if (addressprint
|| b
->source_file
== NULL
)
4565 printf_filtered (" at ");
4566 print_address_numeric (b
->address
, 1, gdb_stdout
);
4569 printf_filtered (": file %s, line %d.",
4570 b
->source_file
, b
->line_number
);
4572 do_cleanups (old_chain
);
4573 if (ui_out_is_mi_like_p (uiout
))
4575 printf_filtered ("\n");
4579 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4580 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4581 COND[i] and COND_STRING[i] values.
4583 NOTE: If the function succeeds, the caller is expected to cleanup
4584 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4585 array contents). If the function fails (error() is called), the
4586 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4587 COND and SALS arrays and each of those arrays contents. */
4590 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4591 struct expression
**cond
, char **cond_string
,
4592 enum bptype type
, enum bpdisp disposition
,
4593 int thread
, int ignore_count
, int from_tty
)
4595 if (type
== bp_hardware_breakpoint
)
4597 int i
= hw_breakpoint_used_count ();
4598 int target_resources_ok
=
4599 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4601 if (target_resources_ok
== 0)
4602 error ("No hardware breakpoint support in the target.");
4603 else if (target_resources_ok
< 0)
4604 error ("Hardware breakpoints used exceeds limit.");
4607 /* Now set all the breakpoints. */
4610 for (i
= 0; i
< sals
.nelts
; i
++)
4612 struct breakpoint
*b
;
4613 struct symtab_and_line sal
= sals
.sals
[i
];
4616 describe_other_breakpoints (sal
.pc
, sal
.section
);
4618 b
= set_raw_breakpoint (sal
, type
);
4619 set_breakpoint_count (breakpoint_count
+ 1);
4620 b
->number
= breakpoint_count
;
4624 b
->addr_string
= addr_string
[i
];
4626 /* addr_string has to be used or breakpoint_re_set will delete
4628 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->address
));
4629 b
->cond_string
= cond_string
[i
];
4630 b
->ignore_count
= ignore_count
;
4631 b
->enable_state
= bp_enabled
;
4632 b
->disposition
= disposition
;
4638 /* Parse ARG which is assumed to be a SAL specification possibly
4639 followed by conditionals. On return, SALS contains an array of SAL
4640 addresses found. ADDR_STRING contains a vector of (canonical)
4641 address strings. ARG points to the end of the SAL. */
4644 parse_breakpoint_sals (char **address
,
4645 struct symtabs_and_lines
*sals
,
4646 char ***addr_string
)
4648 char *addr_start
= *address
;
4649 *addr_string
= NULL
;
4650 /* If no arg given, or if first arg is 'if ', use the default
4652 if ((*address
) == NULL
4653 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4655 if (default_breakpoint_valid
)
4657 struct symtab_and_line sal
;
4658 init_sal (&sal
); /* initialize to zeroes */
4659 sals
->sals
= (struct symtab_and_line
*)
4660 xmalloc (sizeof (struct symtab_and_line
));
4661 sal
.pc
= default_breakpoint_address
;
4662 sal
.line
= default_breakpoint_line
;
4663 sal
.symtab
= default_breakpoint_symtab
;
4664 sal
.section
= find_pc_overlay (sal
.pc
);
4665 sals
->sals
[0] = sal
;
4669 error ("No default breakpoint address now.");
4673 /* Force almost all breakpoints to be in terms of the
4674 current_source_symtab (which is decode_line_1's default). This
4675 should produce the results we want almost all of the time while
4676 leaving default_breakpoint_* alone.
4677 ObjC: However, don't match an Objective-C method name which
4678 may have a '+' or '-' succeeded by a '[' */
4680 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
4682 if (default_breakpoint_valid
4684 || ((strchr ("+-", (*address
)[0]) != NULL
)
4685 && ((*address
)[1] != '['))))
4686 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
4687 default_breakpoint_line
, addr_string
);
4689 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0, addr_string
);
4691 /* For any SAL that didn't have a canonical string, fill one in. */
4692 if (sals
->nelts
> 0 && *addr_string
== NULL
)
4693 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
4694 if (addr_start
!= (*address
))
4697 for (i
= 0; i
< sals
->nelts
; i
++)
4699 /* Add the string if not present. */
4700 if ((*addr_string
)[i
] == NULL
)
4701 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
4707 /* Convert each SAL into a real PC. Verify that the PC can be
4708 inserted as a breakpoint. If it can't throw an error. */
4711 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
4715 for (i
= 0; i
< sals
->nelts
; i
++)
4717 resolve_sal_pc (&sals
->sals
[i
]);
4719 /* It's possible for the PC to be nonzero, but still an illegal
4720 value on some targets.
4722 For example, on HP-UX if you start gdb, and before running the
4723 inferior you try to set a breakpoint on a shared library function
4724 "foo" where the inferior doesn't call "foo" directly but does
4725 pass its address to another function call, then we do find a
4726 minimal symbol for the "foo", but it's address is invalid.
4727 (Appears to be an index into a table that the loader sets up
4728 when the inferior is run.)
4730 Give the target a chance to bless sals.sals[i].pc before we
4731 try to make a breakpoint for it. */
4732 if (PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
4734 if (address
== NULL
)
4735 error ("Cannot break without a running program.");
4737 error ("Cannot break on %s without a running program.",
4743 /* Set a breakpoint according to ARG (function, linenum or *address)
4744 flag: first bit : 0 non-temporary, 1 temporary.
4745 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4748 break_command_1 (char *arg
, int flag
, int from_tty
)
4750 int tempflag
, hardwareflag
;
4751 struct symtabs_and_lines sals
;
4752 register struct expression
**cond
= 0;
4753 /* Pointers in arg to the start, and one past the end, of the
4755 char **cond_string
= (char **) NULL
;
4756 char *addr_start
= arg
;
4758 struct cleanup
*old_chain
;
4759 struct cleanup
*breakpoint_chain
= NULL
;
4762 int ignore_count
= 0;
4764 hardwareflag
= flag
& BP_HARDWAREFLAG
;
4765 tempflag
= flag
& BP_TEMPFLAG
;
4770 parse_breakpoint_sals (&arg
, &sals
, &addr_string
);
4775 /* Create a chain of things that always need to be cleaned up. */
4776 old_chain
= make_cleanup (null_cleanup
, 0);
4778 /* Make sure that all storage allocated to SALS gets freed. */
4779 make_cleanup (xfree
, sals
.sals
);
4781 /* Cleanup the addr_string array but not its contents. */
4782 make_cleanup (xfree
, addr_string
);
4784 /* Allocate space for all the cond expressions. */
4785 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4786 make_cleanup (xfree
, cond
);
4788 /* Allocate space for all the cond strings. */
4789 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4790 make_cleanup (xfree
, cond_string
);
4792 /* ----------------------------- SNIP -----------------------------
4793 Anything added to the cleanup chain beyond this point is assumed
4794 to be part of a breakpoint. If the breakpoint create succeeds
4795 then the memory is not reclaimed. */
4796 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4798 /* Mark the contents of the addr_string for cleanup. These go on
4799 the breakpoint_chain and only occure if the breakpoint create
4801 for (i
= 0; i
< sals
.nelts
; i
++)
4803 if (addr_string
[i
] != NULL
)
4804 make_cleanup (xfree
, addr_string
[i
]);
4807 /* Resolve all line numbers to PC's and verify that the addresses
4808 are ok for the target. */
4809 breakpoint_sals_to_pc (&sals
, addr_start
);
4811 /* Verify that condition can be parsed, before setting any
4812 breakpoints. Allocate a separate condition expression for each
4814 thread
= -1; /* No specific thread yet */
4815 for (i
= 0; i
< sals
.nelts
; i
++)
4822 char *cond_start
= NULL
;
4823 char *cond_end
= NULL
;
4824 while (*tok
== ' ' || *tok
== '\t')
4829 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
4832 toklen
= end_tok
- tok
;
4834 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
4836 tok
= cond_start
= end_tok
+ 1;
4837 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4838 make_cleanup (xfree
, cond
[i
]);
4840 cond_string
[i
] = savestring (cond_start
, cond_end
- cond_start
);
4841 make_cleanup (xfree
, cond_string
[i
]);
4843 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
4849 thread
= strtol (tok
, &tok
, 0);
4851 error ("Junk after thread keyword.");
4852 if (!valid_thread_id (thread
))
4853 error ("Unknown thread %d\n", thread
);
4856 error ("Junk at end of arguments.");
4860 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
4861 hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
4862 tempflag
? disp_del
: disp_donttouch
,
4863 thread
, ignore_count
, from_tty
);
4867 warning ("Multiple breakpoints were set.");
4868 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
4870 /* That's it. Discard the cleanups for data inserted into the
4872 discard_cleanups (breakpoint_chain
);
4873 /* But cleanup everything else. */
4874 do_cleanups (old_chain
);
4877 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
4878 linenum or *address) with COND and IGNORE_COUNT. */
4880 struct captured_breakpoint_args
4891 do_captured_breakpoint (void *data
)
4893 struct captured_breakpoint_args
*args
= data
;
4894 struct symtabs_and_lines sals
;
4895 register struct expression
**cond
;
4896 struct cleanup
*old_chain
;
4897 struct cleanup
*breakpoint_chain
= NULL
;
4904 /* Parse the source and lines spec. Delay check that the expression
4905 didn't contain trailing garbage until after cleanups are in
4909 address_end
= args
->address
;
4911 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
);
4916 /* Create a chain of things at always need to be cleaned up. */
4917 old_chain
= make_cleanup (null_cleanup
, 0);
4919 /* Always have a addr_string array, even if it is empty. */
4920 make_cleanup (xfree
, addr_string
);
4922 /* Make sure that all storage allocated to SALS gets freed. */
4923 make_cleanup (xfree
, sals
.sals
);
4925 /* Allocate space for all the cond expressions. */
4926 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4927 make_cleanup (xfree
, cond
);
4929 /* Allocate space for all the cond strings. */
4930 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4931 make_cleanup (xfree
, cond_string
);
4933 /* ----------------------------- SNIP -----------------------------
4934 Anything added to the cleanup chain beyond this point is assumed
4935 to be part of a breakpoint. If the breakpoint create goes
4936 through then that memory is not cleaned up. */
4937 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4939 /* Mark the contents of the addr_string for cleanup. These go on
4940 the breakpoint_chain and only occure if the breakpoint create
4942 for (i
= 0; i
< sals
.nelts
; i
++)
4944 if (addr_string
[i
] != NULL
)
4945 make_cleanup (xfree
, addr_string
[i
]);
4948 /* Wait until now before checking for garbage at the end of the
4949 address. That way cleanups can take care of freeing any
4951 if (*address_end
!= '\0')
4952 error ("Garbage %s following breakpoint address", address_end
);
4954 /* Resolve all line numbers to PC's. */
4955 breakpoint_sals_to_pc (&sals
, args
->address
);
4957 /* Verify that conditions can be parsed, before setting any
4959 for (i
= 0; i
< sals
.nelts
; i
++)
4961 if (args
->condition
!= NULL
)
4963 char *tok
= args
->condition
;
4964 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4966 error ("Garbage %s follows condition", tok
);
4967 make_cleanup (xfree
, cond
[i
]);
4968 cond_string
[i
] = xstrdup (args
->condition
);
4972 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
4973 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
4974 args
->tempflag
? disp_del
: disp_donttouch
,
4975 args
->thread
, args
->ignore_count
, 0/*from-tty*/);
4977 /* That's it. Discard the cleanups for data inserted into the
4979 discard_cleanups (breakpoint_chain
);
4980 /* But cleanup everything else. */
4981 do_cleanups (old_chain
);
4986 gdb_breakpoint (char *address
, char *condition
,
4987 int hardwareflag
, int tempflag
,
4988 int thread
, int ignore_count
)
4990 struct captured_breakpoint_args args
;
4991 args
.address
= address
;
4992 args
.condition
= condition
;
4993 args
.hardwareflag
= hardwareflag
;
4994 args
.tempflag
= tempflag
;
4995 args
.thread
= thread
;
4996 args
.ignore_count
= ignore_count
;
4997 return catch_errors (do_captured_breakpoint
, &args
,
4998 NULL
, RETURN_MASK_ALL
);
5003 break_at_finish_at_depth_command_1 (char *arg
, int flag
, int from_tty
)
5005 struct frame_info
*frame
;
5006 CORE_ADDR low
, high
, selected_pc
= 0;
5007 char *extra_args
= NULL
;
5009 int extra_args_len
= 0, if_arg
= 0;
5012 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5015 if (default_breakpoint_valid
)
5017 if (deprecated_selected_frame
)
5019 selected_pc
= get_frame_pc (deprecated_selected_frame
);
5024 error ("No selected frame.");
5027 error ("No default breakpoint address now.");
5031 extra_args
= strchr (arg
, ' ');
5035 extra_args_len
= strlen (extra_args
);
5036 level_arg
= (char *) xmalloc (extra_args
- arg
);
5037 strncpy (level_arg
, arg
, extra_args
- arg
- 1);
5038 level_arg
[extra_args
- arg
- 1] = '\0';
5042 level_arg
= (char *) xmalloc (strlen (arg
) + 1);
5043 strcpy (level_arg
, arg
);
5046 frame
= parse_frame_specification (level_arg
);
5048 selected_pc
= get_frame_pc (frame
);
5055 extra_args_len
= strlen (arg
);
5060 if (find_pc_partial_function (selected_pc
, (char **) NULL
, &low
, &high
))
5064 addr_string
= xstrprintf ("*0x%s %s", paddr_nz (high
), extra_args
);
5066 addr_string
= xstrprintf ("*0x%s", paddr_nz (high
));
5067 break_command_1 (addr_string
, flag
, from_tty
);
5068 xfree (addr_string
);
5071 error ("No function contains the specified address");
5074 error ("Unable to set breakpoint at procedure exit");
5079 break_at_finish_command_1 (char *arg
, int flag
, int from_tty
)
5081 char *addr_string
, *break_string
, *beg_addr_string
;
5082 CORE_ADDR low
, high
;
5083 struct symtabs_and_lines sals
;
5084 struct symtab_and_line sal
;
5085 struct cleanup
*old_chain
;
5086 char *extra_args
= NULL
;
5087 int extra_args_len
= 0;
5091 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5093 if (default_breakpoint_valid
)
5095 if (deprecated_selected_frame
)
5097 addr_string
= xstrprintf ("*0x%s",
5098 paddr_nz (get_frame_pc (deprecated_selected_frame
)));
5103 error ("No selected frame.");
5106 error ("No default breakpoint address now.");
5110 addr_string
= (char *) xmalloc (strlen (arg
) + 1);
5111 strcpy (addr_string
, arg
);
5117 extra_args_len
= strlen (arg
);
5121 /* get the stuff after the function name or address */
5122 extra_args
= strchr (arg
, ' ');
5126 extra_args_len
= strlen (extra_args
);
5133 beg_addr_string
= addr_string
;
5134 sals
= decode_line_1 (&addr_string
, 1, (struct symtab
*) NULL
, 0,
5137 xfree (beg_addr_string
);
5138 old_chain
= make_cleanup (xfree
, sals
.sals
);
5139 for (i
= 0; (i
< sals
.nelts
); i
++)
5142 if (find_pc_partial_function (sal
.pc
, (char **) NULL
, &low
, &high
))
5146 break_string
= xstrprintf ("*0x%s %s", paddr_nz (high
),
5149 break_string
= xstrprintf ("*0x%s", paddr_nz (high
));
5150 break_command_1 (break_string
, flag
, from_tty
);
5151 xfree (break_string
);
5154 error ("No function contains the specified address");
5158 warning ("Multiple breakpoints were set.\n");
5159 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5161 do_cleanups (old_chain
);
5165 /* Helper function for break_command_1 and disassemble_command. */
5168 resolve_sal_pc (struct symtab_and_line
*sal
)
5172 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5174 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5175 error ("No line %d in file \"%s\".",
5176 sal
->line
, sal
->symtab
->filename
);
5180 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5182 struct blockvector
*bv
;
5187 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5190 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5191 sym
= block_function (b
);
5194 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5195 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5199 /* It really is worthwhile to have the section, so we'll just
5200 have to look harder. This case can be executed if we have
5201 line numbers but no functions (as can happen in assembly
5204 struct minimal_symbol
*msym
;
5206 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5208 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5215 break_command (char *arg
, int from_tty
)
5217 break_command_1 (arg
, 0, from_tty
);
5221 break_at_finish_command (char *arg
, int from_tty
)
5223 break_at_finish_command_1 (arg
, 0, from_tty
);
5227 break_at_finish_at_depth_command (char *arg
, int from_tty
)
5229 break_at_finish_at_depth_command_1 (arg
, 0, from_tty
);
5233 tbreak_command (char *arg
, int from_tty
)
5235 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5239 tbreak_at_finish_command (char *arg
, int from_tty
)
5241 break_at_finish_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5245 hbreak_command (char *arg
, int from_tty
)
5247 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5251 thbreak_command (char *arg
, int from_tty
)
5253 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5257 stop_command (char *arg
, int from_tty
)
5259 printf_filtered ("Specify the type of breakpoint to set.\n\
5260 Usage: stop in <function | address>\n\
5265 stopin_command (char *arg
, int from_tty
)
5269 if (arg
== (char *) NULL
)
5271 else if (*arg
!= '*')
5276 /* look for a ':'. If this is a line number specification, then
5277 say it is bad, otherwise, it should be an address or
5278 function/method name */
5279 while (*argptr
&& !hasColon
)
5281 hasColon
= (*argptr
== ':');
5286 badInput
= (*argptr
!= ':'); /* Not a class::method */
5288 badInput
= isdigit (*arg
); /* a simple line number */
5292 printf_filtered ("Usage: stop in <function | address>\n");
5294 break_command_1 (arg
, 0, from_tty
);
5298 stopat_command (char *arg
, int from_tty
)
5302 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5309 /* look for a ':'. If there is a '::' then get out, otherwise
5310 it is probably a line number. */
5311 while (*argptr
&& !hasColon
)
5313 hasColon
= (*argptr
== ':');
5318 badInput
= (*argptr
== ':'); /* we have class::method */
5320 badInput
= !isdigit (*arg
); /* not a line number */
5324 printf_filtered ("Usage: stop at <line>\n");
5326 break_command_1 (arg
, 0, from_tty
);
5330 /* accessflag: hw_write: watch write,
5331 hw_read: watch read,
5332 hw_access: watch access (read or write) */
5334 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5336 struct breakpoint
*b
;
5337 struct symtab_and_line sal
;
5338 struct expression
*exp
;
5339 struct block
*exp_valid_block
;
5340 struct value
*val
, *mark
;
5341 struct frame_info
*frame
;
5342 struct frame_info
*prev_frame
= NULL
;
5343 char *exp_start
= NULL
;
5344 char *exp_end
= NULL
;
5345 char *tok
, *end_tok
;
5347 char *cond_start
= NULL
;
5348 char *cond_end
= NULL
;
5349 struct expression
*cond
= NULL
;
5350 int i
, other_type_used
, target_resources_ok
= 0;
5351 enum bptype bp_type
;
5354 init_sal (&sal
); /* initialize to zeroes */
5356 /* Parse arguments. */
5357 innermost_block
= NULL
;
5359 exp
= parse_exp_1 (&arg
, 0, 0);
5361 exp_valid_block
= innermost_block
;
5362 mark
= value_mark ();
5363 val
= evaluate_expression (exp
);
5364 release_value (val
);
5365 if (VALUE_LAZY (val
))
5366 value_fetch_lazy (val
);
5369 while (*tok
== ' ' || *tok
== '\t')
5373 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5376 toklen
= end_tok
- tok
;
5377 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5379 tok
= cond_start
= end_tok
+ 1;
5380 cond
= parse_exp_1 (&tok
, 0, 0);
5384 error ("Junk at end of command.");
5386 if (accessflag
== hw_read
)
5387 bp_type
= bp_read_watchpoint
;
5388 else if (accessflag
== hw_access
)
5389 bp_type
= bp_access_watchpoint
;
5391 bp_type
= bp_hardware_watchpoint
;
5393 mem_cnt
= can_use_hardware_watchpoint (val
);
5394 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5395 error ("Expression cannot be implemented with read/access watchpoint.");
5398 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5399 target_resources_ok
=
5400 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5402 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5403 error ("Target does not support this type of hardware watchpoint.");
5405 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5406 error ("Target can only support one kind of HW watchpoint at a time.");
5409 #if defined(HPUXHPPA)
5410 /* On HP-UX if you set a h/w
5411 watchpoint before the "run" command, the inferior dies with a e.g.,
5412 SIGILL once you start it. I initially believed this was due to a
5413 bad interaction between page protection traps and the initial
5414 startup sequence by the dynamic linker.
5416 However, I tried avoiding that by having HP-UX's implementation of
5417 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5418 yet, which forced slow watches before a "run" or "attach", and it
5419 still fails somewhere in the startup code.
5421 Until I figure out what's happening, I'm disallowing watches altogether
5422 before the "run" or "attach" command. We'll tell the user they must
5423 set watches after getting the program started. */
5424 if (!target_has_execution
)
5426 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5429 #endif /* HPUXHPPA */
5431 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5432 watchpoint could not be set. */
5433 if (!mem_cnt
|| target_resources_ok
<= 0)
5434 bp_type
= bp_watchpoint
;
5436 /* Now set up the breakpoint. */
5437 b
= set_raw_breakpoint (sal
, bp_type
);
5438 set_breakpoint_count (breakpoint_count
+ 1);
5439 b
->number
= breakpoint_count
;
5440 b
->disposition
= disp_donttouch
;
5442 b
->exp_valid_block
= exp_valid_block
;
5443 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5447 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5451 frame
= block_innermost_frame (exp_valid_block
);
5454 prev_frame
= get_prev_frame (frame
);
5455 b
->watchpoint_frame
= get_frame_id (frame
);
5459 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5462 /* If the expression is "local", then set up a "watchpoint scope"
5463 breakpoint at the point where we've left the scope of the watchpoint
5465 if (innermost_block
)
5469 struct breakpoint
*scope_breakpoint
;
5470 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5471 bp_watchpoint_scope
);
5473 scope_breakpoint
->enable_state
= bp_enabled
;
5475 /* Automatically delete the breakpoint when it hits. */
5476 scope_breakpoint
->disposition
= disp_del
;
5478 /* Only break in the proper frame (help with recursion). */
5479 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5481 /* Set the address at which we will stop. */
5482 scope_breakpoint
->address
= get_frame_pc (prev_frame
);
5484 /* The scope breakpoint is related to the watchpoint. We
5485 will need to act on them together. */
5486 b
->related_breakpoint
= scope_breakpoint
;
5489 value_free_to_mark (mark
);
5493 /* Return count of locations need to be watched and can be handled
5494 in hardware. If the watchpoint can not be handled
5495 in hardware return zero. */
5497 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5498 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5499 ((BYTE_SIZE) <= (DEPRECATED_REGISTER_SIZE))
5502 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5503 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5504 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5508 can_use_hardware_watchpoint (struct value
*v
)
5510 int found_memory_cnt
= 0;
5511 struct value
*head
= v
;
5513 /* Did the user specifically forbid us to use hardware watchpoints? */
5514 if (!can_use_hw_watchpoints
)
5517 /* Make sure that the value of the expression depends only upon
5518 memory contents, and values computed from them within GDB. If we
5519 find any register references or function calls, we can't use a
5520 hardware watchpoint.
5522 The idea here is that evaluating an expression generates a series
5523 of values, one holding the value of every subexpression. (The
5524 expression a*b+c has five subexpressions: a, b, a*b, c, and
5525 a*b+c.) GDB's values hold almost enough information to establish
5526 the criteria given above --- they identify memory lvalues,
5527 register lvalues, computed values, etcetera. So we can evaluate
5528 the expression, and then scan the chain of values that leaves
5529 behind to decide whether we can detect any possible change to the
5530 expression's final value using only hardware watchpoints.
5532 However, I don't think that the values returned by inferior
5533 function calls are special in any way. So this function may not
5534 notice that an expression involving an inferior function call
5535 can't be watched with hardware watchpoints. FIXME. */
5536 for (; v
; v
= v
->next
)
5538 if (VALUE_LVAL (v
) == lval_memory
)
5541 /* A lazy memory lvalue is one that GDB never needed to fetch;
5542 we either just used its address (e.g., `a' in `a.b') or
5543 we never needed it at all (e.g., `a' in `a,b'). */
5547 /* Ahh, memory we actually used! Check if we can cover
5548 it with hardware watchpoints. */
5549 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
5551 /* We only watch structs and arrays if user asked for it
5552 explicitly, never if they just happen to appear in a
5553 middle of some value chain. */
5555 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5556 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5558 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
5559 int len
= TYPE_LENGTH (VALUE_TYPE (v
));
5561 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5568 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
5569 return 0; /* ??? What does this represent? */
5570 else if (v
->lval
== lval_register
)
5571 return 0; /* cannot watch a register with a HW watchpoint */
5574 /* The expression itself looks suitable for using a hardware
5575 watchpoint, but give the target machine a chance to reject it. */
5576 return found_memory_cnt
;
5580 watch_command_wrapper (char *arg
, int from_tty
)
5582 watch_command (arg
, from_tty
);
5586 watch_command (char *arg
, int from_tty
)
5588 watch_command_1 (arg
, hw_write
, from_tty
);
5592 rwatch_command_wrapper (char *arg
, int from_tty
)
5594 rwatch_command (arg
, from_tty
);
5598 rwatch_command (char *arg
, int from_tty
)
5600 watch_command_1 (arg
, hw_read
, from_tty
);
5604 awatch_command_wrapper (char *arg
, int from_tty
)
5606 awatch_command (arg
, from_tty
);
5610 awatch_command (char *arg
, int from_tty
)
5612 watch_command_1 (arg
, hw_access
, from_tty
);
5616 /* Helper routines for the until_command routine in infcmd.c. Here
5617 because it uses the mechanisms of breakpoints. */
5619 /* This function is called by fetch_inferior_event via the
5620 cmd_continuation pointer, to complete the until command. It takes
5621 care of cleaning up the temporary breakpoints set up by the until
5624 until_break_command_continuation (struct continuation_arg
*arg
)
5626 struct cleanup
*cleanups
;
5628 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5629 do_exec_cleanups (cleanups
);
5634 until_break_command (char *arg
, int from_tty
, int anywhere
)
5636 struct symtabs_and_lines sals
;
5637 struct symtab_and_line sal
;
5638 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
5639 struct breakpoint
*breakpoint
;
5640 struct cleanup
*old_chain
;
5641 struct continuation_arg
*arg1
;
5644 clear_proceed_status ();
5646 /* Set a breakpoint where the user wants it and at return from
5649 if (default_breakpoint_valid
)
5650 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5651 default_breakpoint_line
, (char ***) NULL
);
5653 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5654 0, (char ***) NULL
);
5656 if (sals
.nelts
!= 1)
5657 error ("Couldn't get information on specified line.");
5660 xfree (sals
.sals
); /* malloc'd, so freed */
5663 error ("Junk at end of arguments.");
5665 resolve_sal_pc (&sal
);
5668 /* If the user told us to continue until a specified location,
5669 we don't specify a frame at which we need to stop. */
5670 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
5672 /* Otherwise, specify the current frame, because we want to stop only
5673 at the very same frame. */
5674 breakpoint
= set_momentary_breakpoint (sal
,
5675 get_frame_id (deprecated_selected_frame
),
5678 if (!event_loop_p
|| !target_can_async_p ())
5679 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5681 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5683 /* If we are running asynchronously, and the target supports async
5684 execution, we are not waiting for the target to stop, in the call
5685 tp proceed, below. This means that we cannot delete the
5686 brekpoints until the target has actually stopped. The only place
5687 where we get a chance to do that is in fetch_inferior_event, so
5688 we must set things up for that. */
5690 if (event_loop_p
&& target_can_async_p ())
5692 /* In this case the arg for the continuation is just the point
5693 in the exec_cleanups chain from where to start doing
5694 cleanups, because all the continuation does is the cleanups in
5695 the exec_cleanup_chain. */
5697 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5699 arg1
->data
.pointer
= old_chain
;
5701 add_continuation (until_break_command_continuation
, arg1
);
5704 /* Keep within the current frame, or in frames called by the current
5708 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
5709 sal
.pc
= get_frame_pc (prev_frame
);
5710 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
5712 if (!event_loop_p
|| !target_can_async_p ())
5713 make_cleanup_delete_breakpoint (breakpoint
);
5715 make_exec_cleanup_delete_breakpoint (breakpoint
);
5718 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
5719 /* Do the cleanups now, anly if we are not running asynchronously,
5720 of if we are, but the target is still synchronous. */
5721 if (!event_loop_p
|| !target_can_async_p ())
5722 do_cleanups (old_chain
);
5726 /* These aren't used; I don't konw what they were for. */
5727 /* Set a breakpoint at the catch clause for NAME. */
5729 catch_breakpoint (char *name
)
5734 disable_catch_breakpoint (void)
5739 delete_catch_breakpoint (void)
5744 enable_catch_breakpoint (void)
5750 ep_skip_leading_whitespace (char **s
)
5752 if ((s
== NULL
) || (*s
== NULL
))
5754 while (isspace (**s
))
5758 /* This function examines a string, and attempts to find a token
5759 that might be an event name in the leading characters. If a
5760 possible match is found, a pointer to the last character of
5761 the token is returned. Else, NULL is returned. */
5764 ep_find_event_name_end (char *arg
)
5767 char *event_name_end
= NULL
;
5769 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5773 /* We break out of the loop when we find a token delimiter.
5774 Basically, we're looking for alphanumerics and underscores;
5775 anything else delimites the token. */
5778 if (!isalnum (*s
) && (*s
!= '_'))
5784 return event_name_end
;
5788 /* This function attempts to parse an optional "if <cond>" clause
5789 from the arg string. If one is not found, it returns NULL.
5791 Else, it returns a pointer to the condition string. (It does not
5792 attempt to evaluate the string against a particular block.) And,
5793 it updates arg to point to the first character following the parsed
5794 if clause in the arg string. */
5797 ep_parse_optional_if_clause (char **arg
)
5801 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
5804 /* Skip the "if" keyword. */
5807 /* Skip any extra leading whitespace, and record the start of the
5808 condition string. */
5809 ep_skip_leading_whitespace (arg
);
5812 /* Assume that the condition occupies the remainder of the arg string. */
5813 (*arg
) += strlen (cond_string
);
5818 /* This function attempts to parse an optional filename from the arg
5819 string. If one is not found, it returns NULL.
5821 Else, it returns a pointer to the parsed filename. (This function
5822 makes no attempt to verify that a file of that name exists, or is
5823 accessible.) And, it updates arg to point to the first character
5824 following the parsed filename in the arg string.
5826 Note that clients needing to preserve the returned filename for
5827 future access should copy it to their own buffers. */
5829 ep_parse_optional_filename (char **arg
)
5831 static char filename
[1024];
5836 if ((*arg_p
== '\0') || isspace (*arg_p
))
5854 /* Commands to deal with catching events, such as signals, exceptions,
5855 process start/exit, etc. */
5859 catch_fork
, catch_vfork
5863 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
5864 static void catch_fork_command_1 (catch_fork_kind fork_kind
,
5865 char *arg
, int tempflag
, int from_tty
);
5868 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
5871 char *cond_string
= NULL
;
5873 ep_skip_leading_whitespace (&arg
);
5875 /* The allowed syntax is:
5877 catch [v]fork if <cond>
5879 First, check if there's an if clause. */
5880 cond_string
= ep_parse_optional_if_clause (&arg
);
5882 if ((*arg
!= '\0') && !isspace (*arg
))
5883 error ("Junk at end of arguments.");
5885 /* If this target supports it, create a fork or vfork catchpoint
5886 and enable reporting of such events. */
5890 create_fork_event_catchpoint (tempflag
, cond_string
);
5893 create_vfork_event_catchpoint (tempflag
, cond_string
);
5896 error ("unsupported or unknown fork kind; cannot catch it");
5902 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
5904 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
5906 char *cond_string
= NULL
;
5908 ep_skip_leading_whitespace (&arg
);
5910 /* The allowed syntax is:
5912 catch exec if <cond>
5914 First, check if there's an if clause. */
5915 cond_string
= ep_parse_optional_if_clause (&arg
);
5917 if ((*arg
!= '\0') && !isspace (*arg
))
5918 error ("Junk at end of arguments.");
5920 /* If this target supports it, create an exec catchpoint
5921 and enable reporting of such events. */
5922 create_exec_event_catchpoint (tempflag
, cond_string
);
5926 #if defined(SOLIB_ADD)
5928 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
5930 char *dll_pathname
= NULL
;
5931 char *cond_string
= NULL
;
5933 ep_skip_leading_whitespace (&arg
);
5935 /* The allowed syntax is:
5937 catch load if <cond>
5938 catch load <filename>
5939 catch load <filename> if <cond>
5941 The user is not allowed to specify the <filename> after an
5944 We'll ignore the pathological case of a file named "if".
5946 First, check if there's an if clause. If so, then there
5947 cannot be a filename. */
5948 cond_string
= ep_parse_optional_if_clause (&arg
);
5950 /* If there was an if clause, then there cannot be a filename.
5951 Else, there might be a filename and an if clause. */
5952 if (cond_string
== NULL
)
5954 dll_pathname
= ep_parse_optional_filename (&arg
);
5955 ep_skip_leading_whitespace (&arg
);
5956 cond_string
= ep_parse_optional_if_clause (&arg
);
5959 if ((*arg
!= '\0') && !isspace (*arg
))
5960 error ("Junk at end of arguments.");
5962 /* Create a load breakpoint that only triggers when a load of
5963 the specified dll (or any dll, if no pathname was specified)
5965 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
5966 dll_pathname
, cond_string
);
5970 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
5972 char *dll_pathname
= NULL
;
5973 char *cond_string
= NULL
;
5975 ep_skip_leading_whitespace (&arg
);
5977 /* The allowed syntax is:
5979 catch unload if <cond>
5980 catch unload <filename>
5981 catch unload <filename> if <cond>
5983 The user is not allowed to specify the <filename> after an
5986 We'll ignore the pathological case of a file named "if".
5988 First, check if there's an if clause. If so, then there
5989 cannot be a filename. */
5990 cond_string
= ep_parse_optional_if_clause (&arg
);
5992 /* If there was an if clause, then there cannot be a filename.
5993 Else, there might be a filename and an if clause. */
5994 if (cond_string
== NULL
)
5996 dll_pathname
= ep_parse_optional_filename (&arg
);
5997 ep_skip_leading_whitespace (&arg
);
5998 cond_string
= ep_parse_optional_if_clause (&arg
);
6001 if ((*arg
!= '\0') && !isspace (*arg
))
6002 error ("Junk at end of arguments.");
6004 /* Create an unload breakpoint that only triggers when an unload of
6005 the specified dll (or any dll, if no pathname was specified)
6007 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6008 dll_pathname
, cond_string
);
6010 #endif /* SOLIB_ADD */
6012 /* Commands to deal with catching exceptions. */
6014 /* Set a breakpoint at the specified callback routine for an
6015 exception event callback */
6018 create_exception_catchpoint (int tempflag
, char *cond_string
,
6019 enum exception_event_kind ex_event
,
6020 struct symtab_and_line
*sal
)
6022 struct breakpoint
*b
;
6023 int thread
= -1; /* All threads. */
6026 if (!sal
) /* no exception support? */
6031 case EX_EVENT_THROW
:
6032 bptype
= bp_catch_throw
;
6034 case EX_EVENT_CATCH
:
6035 bptype
= bp_catch_catch
;
6037 default: /* error condition */
6038 error ("Internal error -- invalid catchpoint kind");
6041 b
= set_raw_breakpoint (*sal
, bptype
);
6042 set_breakpoint_count (breakpoint_count
+ 1);
6043 b
->number
= breakpoint_count
;
6045 b
->cond_string
= (cond_string
== NULL
) ?
6046 NULL
: savestring (cond_string
, strlen (cond_string
));
6048 b
->addr_string
= NULL
;
6049 b
->enable_state
= bp_enabled
;
6050 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6054 static enum print_stop_action
6055 print_exception_catchpoint (struct breakpoint
*b
)
6057 annotate_catchpoint (b
->number
);
6059 if (strstr (b
->addr_string
, "throw") != NULL
)
6060 printf_filtered ("\nCatchpoint %d (exception thrown)\n",
6063 printf_filtered ("\nCatchpoint %d (exception caught)\n",
6066 return PRINT_SRC_AND_LOC
;
6070 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6075 ui_out_field_core_addr (uiout
, "addr", b
->address
);
6078 *last_addr
= b
->address
;
6079 if (strstr (b
->addr_string
, "throw") != NULL
)
6080 ui_out_field_string (uiout
, "what", "exception throw");
6082 ui_out_field_string (uiout
, "what", "exception catch");
6086 print_mention_exception_catchpoint (struct breakpoint
*b
)
6088 if (strstr (b
->addr_string
, "throw") != NULL
)
6089 printf_filtered ("Catchpoint %d (throw)", b
->number
);
6091 printf_filtered ("Catchpoint %d (catch)", b
->number
);
6094 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6095 print_exception_catchpoint
,
6096 print_one_exception_catchpoint
,
6097 print_mention_exception_catchpoint
6101 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6102 enum exception_event_kind ex_event
, int from_tty
)
6104 char *trigger_func_name
, *nameptr
;
6105 struct symtabs_and_lines sals
;
6106 struct breakpoint
*b
;
6108 if (ex_event
== EX_EVENT_CATCH
)
6109 trigger_func_name
= xstrdup ("__cxa_begin_catch");
6111 trigger_func_name
= xstrdup ("__cxa_throw");
6113 nameptr
= trigger_func_name
;
6114 sals
= decode_line_1 (&nameptr
, 1, NULL
, 0, NULL
);
6115 if (sals
.nelts
== 0)
6117 xfree (trigger_func_name
);
6121 b
= set_raw_breakpoint (sals
.sals
[0], bp_breakpoint
);
6122 set_breakpoint_count (breakpoint_count
+ 1);
6123 b
->number
= breakpoint_count
;
6125 b
->cond_string
= (cond_string
== NULL
) ?
6126 NULL
: savestring (cond_string
, strlen (cond_string
));
6128 b
->addr_string
= trigger_func_name
;
6129 b
->enable_state
= bp_enabled
;
6130 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6131 b
->ops
= &gnu_v3_exception_catchpoint_ops
;
6138 /* Deal with "catch catch" and "catch throw" commands */
6141 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6142 int tempflag
, int from_tty
)
6144 char *cond_string
= NULL
;
6145 struct symtab_and_line
*sal
= NULL
;
6147 ep_skip_leading_whitespace (&arg
);
6149 cond_string
= ep_parse_optional_if_clause (&arg
);
6151 if ((*arg
!= '\0') && !isspace (*arg
))
6152 error ("Junk at end of arguments.");
6154 if ((ex_event
!= EX_EVENT_THROW
) &&
6155 (ex_event
!= EX_EVENT_CATCH
))
6156 error ("Unsupported or unknown exception event; cannot catch it");
6158 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6161 /* See if we can find a callback routine */
6162 sal
= target_enable_exception_callback (ex_event
, 1);
6166 /* We have callbacks from the runtime system for exceptions.
6167 Set a breakpoint on the sal found, if no errors */
6168 if (sal
!= (struct symtab_and_line
*) -1)
6169 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6171 return; /* something went wrong with setting up callbacks */
6174 warning ("Unsupported with this platform/compiler combination.");
6177 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6178 inside a catch_errors */
6181 cover_target_enable_exception_callback (void *arg
)
6183 args_for_catchpoint_enable
*args
= arg
;
6184 struct symtab_and_line
*sal
;
6185 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6188 else if (sal
== (struct symtab_and_line
*) -1)
6191 return 1; /*is valid */
6195 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6198 /* The first argument may be an event name, such as "start" or "load".
6199 If so, then handle it as such. If it doesn't match an event name,
6200 then attempt to interpret it as an exception name. (This latter is
6201 the v4.16-and-earlier GDB meaning of the "catch" command.)
6203 First, try to find the bounds of what might be an event name. */
6204 char *arg1_start
= arg
;
6208 if (arg1_start
== NULL
)
6210 /* Old behaviour was to use pre-v-4.16 syntax */
6211 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6213 /* Now, this is not allowed */
6214 error ("Catch requires an event name.");
6217 arg1_end
= ep_find_event_name_end (arg1_start
);
6218 if (arg1_end
== NULL
)
6219 error ("catch requires an event");
6220 arg1_length
= arg1_end
+ 1 - arg1_start
;
6222 /* Try to match what we found against known event names. */
6223 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6225 error ("Catch of signal not yet implemented");
6227 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6229 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6230 tempflag
, from_tty
);
6232 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6234 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6235 tempflag
, from_tty
);
6237 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6239 error ("Catch of thread_start not yet implemented");
6241 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6243 error ("Catch of thread_exit not yet implemented");
6245 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6247 error ("Catch of thread_join not yet implemented");
6249 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6251 error ("Catch of start not yet implemented");
6253 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6255 error ("Catch of exit not yet implemented");
6257 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6259 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6260 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6262 error ("Catch of fork not yet implemented");
6265 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6267 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6268 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6270 error ("Catch of vfork not yet implemented");
6273 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6275 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6276 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6278 error ("Catch of exec not yet implemented");
6281 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6283 #if defined(SOLIB_ADD)
6284 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6286 error ("Catch of load not implemented");
6289 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6291 #if defined(SOLIB_ADD)
6292 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6294 error ("Catch of load not implemented");
6297 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6299 error ("Catch of stop not yet implemented");
6302 /* This doesn't appear to be an event name */
6306 /* Pre-v.4.16 behaviour was to treat the argument
6307 as the name of an exception */
6308 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6309 /* Now this is not allowed */
6310 error ("Unknown event kind specified for catch");
6315 /* Used by the gui, could be made a worker for other things. */
6318 set_breakpoint_sal (struct symtab_and_line sal
)
6320 struct breakpoint
*b
;
6321 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6322 set_breakpoint_count (breakpoint_count
+ 1);
6323 b
->number
= breakpoint_count
;
6330 /* These aren't used; I don't know what they were for. */
6331 /* Disable breakpoints on all catch clauses described in ARGS. */
6333 disable_catch (char *args
)
6335 /* Map the disable command to catch clauses described in ARGS. */
6338 /* Enable breakpoints on all catch clauses described in ARGS. */
6340 enable_catch (char *args
)
6342 /* Map the disable command to catch clauses described in ARGS. */
6345 /* Delete breakpoints on all catch clauses in the active scope. */
6347 delete_catch (char *args
)
6349 /* Map the delete command to catch clauses described in ARGS. */
6354 catch_command (char *arg
, int from_tty
)
6356 catch_command_1 (arg
, 0, from_tty
);
6361 tcatch_command (char *arg
, int from_tty
)
6363 catch_command_1 (arg
, 1, from_tty
);
6366 /* Delete breakpoints by address or line. */
6369 clear_command (char *arg
, int from_tty
)
6371 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6373 struct symtabs_and_lines sals
;
6374 struct symtab_and_line sal
;
6379 sals
= decode_line_spec (arg
, 1);
6384 sals
.sals
= (struct symtab_and_line
*)
6385 xmalloc (sizeof (struct symtab_and_line
));
6386 make_cleanup (xfree
, sals
.sals
);
6387 init_sal (&sal
); /* initialize to zeroes */
6388 sal
.line
= default_breakpoint_line
;
6389 sal
.symtab
= default_breakpoint_symtab
;
6390 sal
.pc
= default_breakpoint_address
;
6391 if (sal
.symtab
== 0)
6392 error ("No source file specified.");
6400 /* For each line spec given, delete bps which correspond
6401 to it. Do it in two passes, solely to preserve the current
6402 behavior that from_tty is forced true if we delete more than
6406 for (i
= 0; i
< sals
.nelts
; i
++)
6408 /* If exact pc given, clear bpts at that pc.
6409 If line given (pc == 0), clear all bpts on specified line.
6410 If defaulting, clear all bpts on default line
6413 defaulting sal.pc != 0 tests to do
6418 1 0 <can't happen> */
6423 /* Find all matching breakpoints, remove them from the
6424 breakpoint chain, and add them to the 'found' chain. */
6425 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6427 /* Are we going to delete b? */
6428 if (b
->type
!= bp_none
6429 && b
->type
!= bp_watchpoint
6430 && b
->type
!= bp_hardware_watchpoint
6431 && b
->type
!= bp_read_watchpoint
6432 && b
->type
!= bp_access_watchpoint
6433 /* Not if b is a watchpoint of any sort... */
6434 && (((sal
.pc
&& (b
->address
== sal
.pc
))
6435 && (!section_is_overlay (b
->section
)
6436 || b
->section
== sal
.section
))
6437 /* Yes, if sal.pc matches b (modulo overlays). */
6438 || ((default_match
|| (0 == sal
.pc
))
6439 && b
->source_file
!= NULL
6440 && sal
.symtab
!= NULL
6441 && STREQ (b
->source_file
, sal
.symtab
->filename
)
6442 && b
->line_number
== sal
.line
)))
6443 /* Yes, if sal source file and line matches b. */
6445 /* Remove it from breakpoint_chain... */
6446 if (b
== breakpoint_chain
)
6448 /* b is at the head of the list */
6449 breakpoint_chain
= b
->next
;
6453 prev
->next
= b
->next
;
6455 /* And add it to 'found' chain. */
6461 /* Keep b, and keep a pointer to it. */
6466 /* Now go thru the 'found' chain and delete them. */
6470 error ("No breakpoint at %s.", arg
);
6472 error ("No breakpoint at this line.");
6476 from_tty
= 1; /* Always report if deleted more than one */
6478 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6479 breakpoints_changed ();
6483 printf_unfiltered ("%d ", found
->number
);
6485 delete_breakpoint (found
);
6489 putchar_unfiltered ('\n');
6492 /* Delete breakpoint in BS if they are `delete' breakpoints and
6493 all breakpoints that are marked for deletion, whether hit or not.
6494 This is called after any breakpoint is hit, or after errors. */
6497 breakpoint_auto_delete (bpstat bs
)
6499 struct breakpoint
*b
, *temp
;
6501 for (; bs
; bs
= bs
->next
)
6502 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6504 delete_breakpoint (bs
->breakpoint_at
);
6506 ALL_BREAKPOINTS_SAFE (b
, temp
)
6508 if (b
->disposition
== disp_del_at_next_stop
)
6509 delete_breakpoint (b
);
6513 /* Delete a breakpoint and clean up all traces of it in the data
6517 delete_breakpoint (struct breakpoint
*bpt
)
6519 register struct breakpoint
*b
;
6523 error ("Internal error (attempted to delete a NULL breakpoint)");
6526 /* Has this bp already been deleted? This can happen because multiple
6527 lists can hold pointers to bp's. bpstat lists are especial culprits.
6529 One example of this happening is a watchpoint's scope bp. When the
6530 scope bp triggers, we notice that the watchpoint is out of scope, and
6531 delete it. We also delete its scope bp. But the scope bp is marked
6532 "auto-deleting", and is already on a bpstat. That bpstat is then
6533 checked for auto-deleting bp's, which are deleted.
6535 A real solution to this problem might involve reference counts in bp's,
6536 and/or giving them pointers back to their referencing bpstat's, and
6537 teaching delete_breakpoint to only free a bp's storage when no more
6538 references were extent. A cheaper bandaid was chosen. */
6539 if (bpt
->type
== bp_none
)
6542 if (delete_breakpoint_hook
)
6543 delete_breakpoint_hook (bpt
);
6544 breakpoint_delete_event (bpt
->number
);
6547 remove_breakpoint (bpt
, mark_inserted
);
6549 if (breakpoint_chain
== bpt
)
6550 breakpoint_chain
= bpt
->next
;
6552 /* If we have callback-style exception catchpoints, don't go through
6553 the adjustments to the C++ runtime library etc. if the inferior
6554 isn't actually running. target_enable_exception_callback for a
6555 null target ops vector gives an undesirable error message, so we
6556 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6557 exceptions are supported in this way, it's OK for now. FIXME */
6558 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6560 /* Format possible error msg */
6561 char *message
= xstrprintf ("Error in deleting catchpoint %d:\n",
6563 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
6564 args_for_catchpoint_enable args
;
6565 args
.kind
= bpt
->type
== bp_catch_catch
?
6566 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6568 catch_errors (cover_target_enable_exception_callback
, &args
,
6569 message
, RETURN_MASK_ALL
);
6570 do_cleanups (cleanups
);
6577 b
->next
= bpt
->next
;
6581 check_duplicates (bpt
);
6582 /* If this breakpoint was inserted, and there is another breakpoint
6583 at the same address, we need to insert the other breakpoint. */
6585 && bpt
->type
!= bp_hardware_watchpoint
6586 && bpt
->type
!= bp_read_watchpoint
6587 && bpt
->type
!= bp_access_watchpoint
6588 && bpt
->type
!= bp_catch_fork
6589 && bpt
->type
!= bp_catch_vfork
6590 && bpt
->type
!= bp_catch_exec
)
6593 if (b
->address
== bpt
->address
6594 && b
->section
== bpt
->section
6596 && b
->enable_state
!= bp_disabled
6597 && b
->enable_state
!= bp_shlib_disabled
6598 && b
->enable_state
!= bp_call_disabled
)
6602 /* We should never reach this point if there is a permanent
6603 breakpoint at the same address as the one being deleted.
6604 If there is a permanent breakpoint somewhere, it should
6605 always be the only one inserted. */
6606 if (b
->enable_state
== bp_permanent
)
6607 internal_error (__FILE__
, __LINE__
,
6608 "another breakpoint was inserted on top of "
6609 "a permanent breakpoint");
6611 if (b
->type
== bp_hardware_breakpoint
)
6612 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
6614 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
6616 /* If there was an error in the insert, print a message, then stop execution. */
6619 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6620 make_cleanup_ui_file_delete (tmp_error_stream
);
6623 if (b
->type
== bp_hardware_breakpoint
)
6625 fprintf_unfiltered (tmp_error_stream
,
6626 "Cannot insert hardware breakpoint %d.\n"
6627 "You may have requested too many hardware breakpoints.\n",
6632 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6633 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6634 print_address_numeric (b
->address
, 1, tmp_error_stream
);
6635 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6636 safe_strerror (val
));
6639 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6640 target_terminal_ours_for_output ();
6641 error_stream(tmp_error_stream
);
6648 free_command_lines (&bpt
->commands
);
6651 if (bpt
->cond_string
!= NULL
)
6652 xfree (bpt
->cond_string
);
6653 if (bpt
->addr_string
!= NULL
)
6654 xfree (bpt
->addr_string
);
6655 if (bpt
->exp
!= NULL
)
6657 if (bpt
->exp_string
!= NULL
)
6658 xfree (bpt
->exp_string
);
6659 if (bpt
->val
!= NULL
)
6660 value_free (bpt
->val
);
6661 if (bpt
->source_file
!= NULL
)
6662 xfree (bpt
->source_file
);
6663 if (bpt
->dll_pathname
!= NULL
)
6664 xfree (bpt
->dll_pathname
);
6665 if (bpt
->triggered_dll_pathname
!= NULL
)
6666 xfree (bpt
->triggered_dll_pathname
);
6667 if (bpt
->exec_pathname
!= NULL
)
6668 xfree (bpt
->exec_pathname
);
6670 /* Be sure no bpstat's are pointing at it after it's been freed. */
6671 /* FIXME, how can we find all bpstat's?
6672 We just check stop_bpstat for now. */
6673 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6674 if (bs
->breakpoint_at
== bpt
)
6676 bs
->breakpoint_at
= NULL
;
6678 /* bs->commands will be freed later. */
6680 /* On the chance that someone will soon try again to delete this same
6681 bp, we mark it as deleted before freeing its storage. */
6682 bpt
->type
= bp_none
;
6688 do_delete_breakpoint_cleanup (void *b
)
6690 delete_breakpoint (b
);
6694 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6696 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6700 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6702 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6706 delete_command (char *arg
, int from_tty
)
6708 struct breakpoint
*b
, *temp
;
6714 int breaks_to_delete
= 0;
6716 /* Delete all breakpoints if no argument.
6717 Do not delete internal or call-dummy breakpoints, these
6718 have to be deleted with an explicit breakpoint number argument. */
6721 if (b
->type
!= bp_call_dummy
&&
6722 b
->type
!= bp_shlib_event
&&
6723 b
->type
!= bp_thread_event
&&
6724 b
->type
!= bp_overlay_event
&&
6726 breaks_to_delete
= 1;
6729 /* Ask user only if there are some breakpoints to delete. */
6731 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
6733 ALL_BREAKPOINTS_SAFE (b
, temp
)
6735 if (b
->type
!= bp_call_dummy
&&
6736 b
->type
!= bp_shlib_event
&&
6737 b
->type
!= bp_thread_event
&&
6738 b
->type
!= bp_overlay_event
&&
6740 delete_breakpoint (b
);
6745 map_breakpoint_numbers (arg
, delete_breakpoint
);
6748 /* Reset a breakpoint given it's struct breakpoint * BINT.
6749 The value we return ends up being the return value from catch_errors.
6750 Unused in this case. */
6753 breakpoint_re_set_one (void *bint
)
6755 /* get past catch_errs */
6756 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6759 struct symtabs_and_lines sals
;
6761 enum enable_state save_enable
;
6766 warning ("attempted to reset apparently deleted breakpoint #%d?",
6770 case bp_hardware_breakpoint
:
6772 case bp_catch_unload
:
6773 if (b
->addr_string
== NULL
)
6775 /* Anything without a string can't be re-set. */
6776 delete_breakpoint (b
);
6779 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6781 ``And a hack it is, although Apple's Darwin version of GDB
6782 contains an almost identical hack to implement a "future
6783 break" command. It seems to work in many real world cases,
6784 but it is easy to come up with a test case where the patch
6785 doesn't help at all.''
6787 ``It seems that the way GDB implements breakpoints - in -
6788 shared - libraries was designed for a.out shared library
6789 systems (SunOS 4) where shared libraries were loaded at a
6790 fixed address in memory. Since ELF shared libraries can (and
6791 will) be loaded at any address in memory, things break.
6792 Fixing this is not trivial. Therefore, I'm not sure whether
6793 we should add this hack to the branch only. I cannot
6794 guarantee that things will be fixed on the trunk in the near
6797 In case we have a problem, disable this breakpoint. We'll
6798 restore its status if we succeed. Don't disable a
6799 shlib_disabled breakpoint though. There's a fair chance we
6800 can't re-set it if the shared library it's in hasn't been
6802 save_enable
= b
->enable_state
;
6803 if (b
->enable_state
!= bp_shlib_disabled
)
6804 b
->enable_state
= bp_disabled
;
6806 set_language (b
->language
);
6807 input_radix
= b
->input_radix
;
6809 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
);
6810 for (i
= 0; i
< sals
.nelts
; i
++)
6812 resolve_sal_pc (&sals
.sals
[i
]);
6814 /* Reparse conditions, they might contain references to the
6816 if (b
->cond_string
!= NULL
)
6821 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
6824 /* We need to re-set the breakpoint if the address changes... */
6825 if (b
->address
!= sals
.sals
[i
].pc
6826 /* ...or new and old breakpoints both have source files, and
6827 the source file name or the line number changes... */
6828 || (b
->source_file
!= NULL
6829 && sals
.sals
[i
].symtab
!= NULL
6830 && (!STREQ (b
->source_file
, sals
.sals
[i
].symtab
->filename
)
6831 || b
->line_number
!= sals
.sals
[i
].line
)
6833 /* ...or we switch between having a source file and not having
6835 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
6838 if (b
->source_file
!= NULL
)
6839 xfree (b
->source_file
);
6840 if (sals
.sals
[i
].symtab
== NULL
)
6841 b
->source_file
= NULL
;
6844 savestring (sals
.sals
[i
].symtab
->filename
,
6845 strlen (sals
.sals
[i
].symtab
->filename
));
6846 b
->line_number
= sals
.sals
[i
].line
;
6847 b
->address
= sals
.sals
[i
].pc
;
6849 /* Used to check for duplicates here, but that can
6850 cause trouble, as it doesn't check for disabled
6855 /* Might be better to do this just once per breakpoint_re_set,
6856 rather than once for every breakpoint. */
6857 breakpoints_changed ();
6859 b
->section
= sals
.sals
[i
].section
;
6860 b
->enable_state
= save_enable
; /* Restore it, this worked. */
6863 /* Now that this is re-enabled, check_duplicates
6865 check_duplicates (b
);
6872 case bp_hardware_watchpoint
:
6873 case bp_read_watchpoint
:
6874 case bp_access_watchpoint
:
6875 innermost_block
= NULL
;
6876 /* The issue arises of what context to evaluate this in. The
6877 same one as when it was set, but what does that mean when
6878 symbols have been re-read? We could save the filename and
6879 functionname, but if the context is more local than that, the
6880 best we could do would be something like how many levels deep
6881 and which index at that particular level, but that's going to
6882 be less stable than filenames or function names. */
6884 /* So for now, just use a global context. */
6887 b
->exp
= parse_expression (b
->exp_string
);
6888 b
->exp_valid_block
= innermost_block
;
6889 mark
= value_mark ();
6891 value_free (b
->val
);
6892 b
->val
= evaluate_expression (b
->exp
);
6893 release_value (b
->val
);
6894 if (VALUE_LAZY (b
->val
) && b
->enable_state
== bp_enabled
)
6895 value_fetch_lazy (b
->val
);
6897 if (b
->cond_string
!= NULL
)
6902 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
6904 if (b
->enable_state
== bp_enabled
)
6906 value_free_to_mark (mark
);
6908 case bp_catch_catch
:
6909 case bp_catch_throw
:
6911 /* We needn't really do anything to reset these, since the mask
6912 that requests them is unaffected by e.g., new libraries being
6915 case bp_catch_vfork
:
6920 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
6922 /* Delete longjmp and overlay event breakpoints; they will be
6923 reset later by breakpoint_re_set. */
6925 case bp_longjmp_resume
:
6926 case bp_overlay_event
:
6927 delete_breakpoint (b
);
6930 /* This breakpoint is special, it's set up when the inferior
6931 starts and we really don't want to touch it. */
6932 case bp_shlib_event
:
6934 /* Like bp_shlib_event, this breakpoint type is special.
6935 Once it is set up, we do not want to touch it. */
6936 case bp_thread_event
:
6938 /* Keep temporary breakpoints, which can be encountered when we step
6939 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
6940 Otherwise these should have been blown away via the cleanup chain
6941 or by breakpoint_init_inferior when we rerun the executable. */
6944 case bp_watchpoint_scope
:
6946 case bp_step_resume
:
6953 /* Re-set all breakpoints after symbols have been re-loaded. */
6955 breakpoint_re_set (void)
6957 struct breakpoint
*b
, *temp
;
6958 enum language save_language
;
6959 int save_input_radix
;
6961 save_language
= current_language
->la_language
;
6962 save_input_radix
= input_radix
;
6963 ALL_BREAKPOINTS_SAFE (b
, temp
)
6965 /* Format possible error msg */
6966 char *message
= xstrprintf ("Error in re-setting breakpoint %d:\n",
6968 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
6969 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
6970 do_cleanups (cleanups
);
6972 set_language (save_language
);
6973 input_radix
= save_input_radix
;
6975 if (GET_LONGJMP_TARGET_P ())
6977 create_longjmp_breakpoint ("longjmp");
6978 create_longjmp_breakpoint ("_longjmp");
6979 create_longjmp_breakpoint ("siglongjmp");
6980 create_longjmp_breakpoint ("_siglongjmp");
6981 create_longjmp_breakpoint (NULL
);
6984 create_overlay_event_breakpoint ("_ovly_debug_event");
6987 /* Reset the thread number of this breakpoint:
6989 - If the breakpoint is for all threads, leave it as-is.
6990 - Else, reset it to the current thread for inferior_ptid. */
6992 breakpoint_re_set_thread (struct breakpoint
*b
)
6994 if (b
->thread
!= -1)
6996 if (in_thread_list (inferior_ptid
))
6997 b
->thread
= pid_to_thread_id (inferior_ptid
);
7001 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7002 If from_tty is nonzero, it prints a message to that effect,
7003 which ends with a period (no newline). */
7006 set_ignore_count (int bptnum
, int count
, int from_tty
)
7008 register struct breakpoint
*b
;
7014 if (b
->number
== bptnum
)
7016 b
->ignore_count
= count
;
7020 printf_filtered ("Will stop next time breakpoint %d is reached.",
7022 else if (count
== 1)
7023 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7026 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7029 breakpoints_changed ();
7030 breakpoint_modify_event (b
->number
);
7034 error ("No breakpoint number %d.", bptnum
);
7037 /* Clear the ignore counts of all breakpoints. */
7039 breakpoint_clear_ignore_counts (void)
7041 struct breakpoint
*b
;
7044 b
->ignore_count
= 0;
7047 /* Command to set ignore-count of breakpoint N to COUNT. */
7050 ignore_command (char *args
, int from_tty
)
7056 error_no_arg ("a breakpoint number");
7058 num
= get_number (&p
);
7060 error ("bad breakpoint number: '%s'", args
);
7062 error ("Second argument (specified ignore-count) is missing.");
7064 set_ignore_count (num
,
7065 longest_to_int (value_as_long (parse_and_eval (p
))),
7068 printf_filtered ("\n");
7071 /* Call FUNCTION on each of the breakpoints
7072 whose numbers are given in ARGS. */
7075 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7077 register char *p
= args
;
7080 register struct breakpoint
*b
, *tmp
;
7084 error_no_arg ("one or more breakpoint numbers");
7091 num
= get_number_or_range (&p1
);
7094 warning ("bad breakpoint number at or near '%s'", p
);
7098 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7099 if (b
->number
== num
)
7101 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7104 if (related_breakpoint
)
7105 function (related_breakpoint
);
7109 printf_unfiltered ("No breakpoint number %d.\n", num
);
7115 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7116 If from_tty is nonzero, it prints a message to that effect,
7117 which ends with a period (no newline). */
7120 disable_breakpoint (struct breakpoint
*bpt
)
7122 /* Never disable a watchpoint scope breakpoint; we want to
7123 hit them when we leave scope so we can delete both the
7124 watchpoint and its scope breakpoint at that time. */
7125 if (bpt
->type
== bp_watchpoint_scope
)
7128 /* You can't disable permanent breakpoints. */
7129 if (bpt
->enable_state
== bp_permanent
)
7132 bpt
->enable_state
= bp_disabled
;
7134 check_duplicates (bpt
);
7136 if (modify_breakpoint_hook
)
7137 modify_breakpoint_hook (bpt
);
7138 breakpoint_modify_event (bpt
->number
);
7143 disable_command (char *args
, int from_tty
)
7145 register struct breakpoint
*bpt
;
7147 ALL_BREAKPOINTS (bpt
)
7151 warning ("attempted to disable apparently deleted breakpoint #%d?",
7156 case bp_catch_unload
:
7158 case bp_catch_vfork
:
7160 case bp_catch_catch
:
7161 case bp_catch_throw
:
7162 case bp_hardware_breakpoint
:
7164 case bp_hardware_watchpoint
:
7165 case bp_read_watchpoint
:
7166 case bp_access_watchpoint
:
7167 disable_breakpoint (bpt
);
7172 map_breakpoint_numbers (args
, disable_breakpoint
);
7176 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7178 struct frame_info
*save_selected_frame
= NULL
;
7179 int save_selected_frame_level
= -1;
7180 int target_resources_ok
, other_type_used
;
7183 if (bpt
->type
== bp_hardware_breakpoint
)
7186 i
= hw_breakpoint_used_count ();
7187 target_resources_ok
=
7188 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7190 if (target_resources_ok
== 0)
7191 error ("No hardware breakpoint support in the target.");
7192 else if (target_resources_ok
< 0)
7193 error ("Hardware breakpoints used exceeds limit.");
7196 if (bpt
->enable_state
!= bp_permanent
)
7197 bpt
->enable_state
= bp_enabled
;
7198 bpt
->disposition
= disposition
;
7199 check_duplicates (bpt
);
7200 breakpoints_changed ();
7202 if (bpt
->type
== bp_watchpoint
||
7203 bpt
->type
== bp_hardware_watchpoint
||
7204 bpt
->type
== bp_read_watchpoint
||
7205 bpt
->type
== bp_access_watchpoint
)
7207 if (bpt
->exp_valid_block
!= NULL
)
7209 struct frame_info
*fr
=
7210 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7214 Cannot enable watchpoint %d because the block in which its expression\n\
7215 is valid is not currently in scope.\n", bpt
->number
);
7216 bpt
->enable_state
= bp_disabled
;
7220 save_selected_frame
= deprecated_selected_frame
;
7221 save_selected_frame_level
= frame_relative_level (deprecated_selected_frame
);
7225 value_free (bpt
->val
);
7226 mark
= value_mark ();
7227 bpt
->val
= evaluate_expression (bpt
->exp
);
7228 release_value (bpt
->val
);
7229 if (VALUE_LAZY (bpt
->val
))
7230 value_fetch_lazy (bpt
->val
);
7232 if (bpt
->type
== bp_hardware_watchpoint
||
7233 bpt
->type
== bp_read_watchpoint
||
7234 bpt
->type
== bp_access_watchpoint
)
7236 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7237 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7239 /* Hack around 'unused var' error for some targets here */
7241 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7242 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7243 /* we can consider of type is bp_hardware_watchpoint, convert to
7244 bp_watchpoint in the following condition */
7245 if (target_resources_ok
< 0)
7248 Cannot enable watchpoint %d because target watch resources\n\
7249 have been allocated for other watchpoints.\n", bpt
->number
);
7250 bpt
->enable_state
= bp_disabled
;
7251 value_free_to_mark (mark
);
7256 if (save_selected_frame_level
>= 0)
7257 select_frame (save_selected_frame
);
7258 value_free_to_mark (mark
);
7260 if (modify_breakpoint_hook
)
7261 modify_breakpoint_hook (bpt
);
7262 breakpoint_modify_event (bpt
->number
);
7266 enable_breakpoint (struct breakpoint
*bpt
)
7268 do_enable_breakpoint (bpt
, bpt
->disposition
);
7271 /* The enable command enables the specified breakpoints (or all defined
7272 breakpoints) so they once again become (or continue to be) effective
7273 in stopping the inferior. */
7277 enable_command (char *args
, int from_tty
)
7279 register struct breakpoint
*bpt
;
7281 ALL_BREAKPOINTS (bpt
)
7285 warning ("attempted to enable apparently deleted breakpoint #%d?",
7290 case bp_catch_unload
:
7292 case bp_catch_vfork
:
7294 case bp_catch_catch
:
7295 case bp_catch_throw
:
7296 case bp_hardware_breakpoint
:
7298 case bp_hardware_watchpoint
:
7299 case bp_read_watchpoint
:
7300 case bp_access_watchpoint
:
7301 enable_breakpoint (bpt
);
7306 map_breakpoint_numbers (args
, enable_breakpoint
);
7310 enable_once_breakpoint (struct breakpoint
*bpt
)
7312 do_enable_breakpoint (bpt
, disp_disable
);
7317 enable_once_command (char *args
, int from_tty
)
7319 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7323 enable_delete_breakpoint (struct breakpoint
*bpt
)
7325 do_enable_breakpoint (bpt
, disp_del
);
7330 enable_delete_command (char *args
, int from_tty
)
7332 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7335 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7337 struct symtabs_and_lines
7338 decode_line_spec_1 (char *string
, int funfirstline
)
7340 struct symtabs_and_lines sals
;
7342 error ("Empty line specification.");
7343 if (default_breakpoint_valid
)
7344 sals
= decode_line_1 (&string
, funfirstline
,
7345 default_breakpoint_symtab
,
7346 default_breakpoint_line
,
7349 sals
= decode_line_1 (&string
, funfirstline
,
7350 (struct symtab
*) NULL
, 0, (char ***) NULL
);
7352 error ("Junk at end of line specification: %s", string
);
7357 _initialize_breakpoint (void)
7359 struct cmd_list_element
*c
;
7361 breakpoint_chain
= 0;
7362 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7363 before a breakpoint is set. */
7364 breakpoint_count
= 0;
7366 add_com ("ignore", class_breakpoint
, ignore_command
,
7367 "Set ignore-count of breakpoint number N to COUNT.\n\
7368 Usage is `ignore N COUNT'.");
7370 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7372 add_com ("commands", class_breakpoint
, commands_command
,
7373 "Set commands to be executed when a breakpoint is hit.\n\
7374 Give breakpoint number as argument after \"commands\".\n\
7375 With no argument, the targeted breakpoint is the last one set.\n\
7376 The commands themselves follow starting on the next line.\n\
7377 Type a line containing \"end\" to indicate the end of them.\n\
7378 Give \"silent\" as the first line to make the breakpoint silent;\n\
7379 then no output is printed when it is hit, except what the commands print.");
7381 add_com ("condition", class_breakpoint
, condition_command
,
7382 "Specify breakpoint number N to break only if COND is true.\n\
7383 Usage is `condition N COND', where N is an integer and COND is an\n\
7384 expression to be evaluated whenever breakpoint N is reached.");
7386 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7387 "Set a temporary breakpoint. Args like \"break\" command.\n\
7388 Like \"break\" except the breakpoint is only temporary,\n\
7389 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7390 by using \"enable delete\" on the breakpoint number.");
7391 set_cmd_completer (c
, location_completer
);
7393 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7394 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7395 Like \"break\" except the breakpoint requires hardware support,\n\
7396 some target hardware may not have this support.");
7397 set_cmd_completer (c
, location_completer
);
7399 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7400 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7401 Like \"hbreak\" except the breakpoint is only temporary,\n\
7402 so it will be deleted when hit.");
7403 set_cmd_completer (c
, location_completer
);
7405 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7406 "Enable some breakpoints.\n\
7407 Give breakpoint numbers (separated by spaces) as arguments.\n\
7408 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7409 This is used to cancel the effect of the \"disable\" command.\n\
7410 With a subcommand you can enable temporarily.",
7411 &enablelist
, "enable ", 1, &cmdlist
);
7413 add_com ("ab", class_breakpoint
, enable_command
,
7414 "Enable some breakpoints.\n\
7415 Give breakpoint numbers (separated by spaces) as arguments.\n\
7416 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7417 This is used to cancel the effect of the \"disable\" command.\n\
7418 With a subcommand you can enable temporarily.");
7420 add_com_alias ("en", "enable", class_breakpoint
, 1);
7422 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7423 "Enable some breakpoints.\n\
7424 Give breakpoint numbers (separated by spaces) as arguments.\n\
7425 This is used to cancel the effect of the \"disable\" command.\n\
7426 May be abbreviated to simply \"enable\".\n",
7427 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7429 add_cmd ("once", no_class
, enable_once_command
,
7430 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7431 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7434 add_cmd ("delete", no_class
, enable_delete_command
,
7435 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7436 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7439 add_cmd ("delete", no_class
, enable_delete_command
,
7440 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7441 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7444 add_cmd ("once", no_class
, enable_once_command
,
7445 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7446 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7449 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7450 "Disable some breakpoints.\n\
7451 Arguments are breakpoint numbers with spaces in between.\n\
7452 To disable all breakpoints, give no argument.\n\
7453 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7454 &disablelist
, "disable ", 1, &cmdlist
);
7455 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7456 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7458 add_com ("sb", class_breakpoint
, disable_command
,
7459 "Disable some breakpoints.\n\
7460 Arguments are breakpoint numbers with spaces in between.\n\
7461 To disable all breakpoints, give no argument.\n\
7462 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7464 add_cmd ("breakpoints", class_alias
, disable_command
,
7465 "Disable some breakpoints.\n\
7466 Arguments are breakpoint numbers with spaces in between.\n\
7467 To disable all breakpoints, give no argument.\n\
7468 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7469 This command may be abbreviated \"disable\".",
7472 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7473 "Delete some breakpoints or auto-display expressions.\n\
7474 Arguments are breakpoint numbers with spaces in between.\n\
7475 To delete all breakpoints, give no argument.\n\
7477 Also a prefix command for deletion of other GDB objects.\n\
7478 The \"unset\" command is also an alias for \"delete\".",
7479 &deletelist
, "delete ", 1, &cmdlist
);
7480 add_com_alias ("d", "delete", class_breakpoint
, 1);
7482 add_com ("db", class_breakpoint
, delete_command
,
7483 "Delete some breakpoints.\n\
7484 Arguments are breakpoint numbers with spaces in between.\n\
7485 To delete all breakpoints, give no argument.\n");
7487 add_cmd ("breakpoints", class_alias
, delete_command
,
7488 "Delete some breakpoints or auto-display expressions.\n\
7489 Arguments are breakpoint numbers with spaces in between.\n\
7490 To delete all breakpoints, give no argument.\n\
7491 This command may be abbreviated \"delete\".",
7494 add_com ("clear", class_breakpoint
, clear_command
,
7495 concat ("Clear breakpoint at specified line or function.\n\
7496 Argument may be line number, function name, or \"*\" and an address.\n\
7497 If line number is specified, all breakpoints in that line are cleared.\n\
7498 If function is specified, breakpoints at beginning of function are cleared.\n\
7499 If an address is specified, breakpoints at that address are cleared.\n\n",
7500 "With no argument, clears all breakpoints in the line that the selected frame\n\
7503 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7505 c
= add_com ("break", class_breakpoint
, break_command
,
7506 concat ("Set breakpoint at specified line or function.\n\
7507 Argument may be line number, function name, or \"*\" and an address.\n\
7508 If line number is specified, break at start of code for that line.\n\
7509 If function is specified, break at start of code for that function.\n\
7510 If an address is specified, break at that exact address.\n",
7511 "With no arg, uses current execution address of selected stack frame.\n\
7512 This is useful for breaking on return to a stack frame.\n\
7514 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7516 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7517 set_cmd_completer (c
, location_completer
);
7519 add_com_alias ("b", "break", class_run
, 1);
7520 add_com_alias ("br", "break", class_run
, 1);
7521 add_com_alias ("bre", "break", class_run
, 1);
7522 add_com_alias ("brea", "break", class_run
, 1);
7526 add_com_alias ("ba", "break", class_breakpoint
, 1);
7527 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7532 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7533 "Break in function/address or break at a line in the current file.",
7534 &stoplist
, "stop ", 1, &cmdlist
);
7535 add_cmd ("in", class_breakpoint
, stopin_command
,
7536 "Break in function or address.\n", &stoplist
);
7537 add_cmd ("at", class_breakpoint
, stopat_command
,
7538 "Break at a line in the current file.\n", &stoplist
);
7539 add_com ("status", class_info
, breakpoints_info
,
7540 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7541 The \"Type\" column indicates one of:\n\
7542 \tbreakpoint - normal breakpoint\n\
7543 \twatchpoint - watchpoint\n\
7544 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7545 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7546 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7547 address and file/line number respectively.\n\n",
7548 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7549 are set to the address of the last breakpoint listed.\n\n\
7550 Convenience variable \"$bpnum\" contains the number of the last\n\
7551 breakpoint set.", NULL
));
7554 add_info ("breakpoints", breakpoints_info
,
7555 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7556 The \"Type\" column indicates one of:\n\
7557 \tbreakpoint - normal breakpoint\n\
7558 \twatchpoint - watchpoint\n\
7559 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7560 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7561 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7562 address and file/line number respectively.\n\n",
7563 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7564 are set to the address of the last breakpoint listed.\n\n\
7565 Convenience variable \"$bpnum\" contains the number of the last\n\
7566 breakpoint set.", NULL
));
7569 add_com ("lb", class_breakpoint
, breakpoints_info
,
7570 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7571 The \"Type\" column indicates one of:\n\
7572 \tbreakpoint - normal breakpoint\n\
7573 \twatchpoint - watchpoint\n\
7574 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7575 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7576 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7577 address and file/line number respectively.\n\n",
7578 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7579 are set to the address of the last breakpoint listed.\n\n\
7580 Convenience variable \"$bpnum\" contains the number of the last\n\
7581 breakpoint set.", NULL
));
7583 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7584 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7585 The \"Type\" column indicates one of:\n\
7586 \tbreakpoint - normal breakpoint\n\
7587 \twatchpoint - watchpoint\n\
7588 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7589 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7590 \tuntil - internal breakpoint used by the \"until\" command\n\
7591 \tfinish - internal breakpoint used by the \"finish\" command\n",
7592 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7593 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7594 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7595 address and file/line number respectively.\n\n",
7596 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7597 are set to the address of the last breakpoint listed.\n\n\
7598 Convenience variable \"$bpnum\" contains the number of the last\n\
7599 breakpoint set.", NULL
),
7600 &maintenanceinfolist
);
7602 add_com ("catch", class_breakpoint
, catch_command
,
7603 "Set catchpoints to catch events.\n\
7604 Raised signals may be caught:\n\
7605 \tcatch signal - all signals\n\
7606 \tcatch signal <signame> - a particular signal\n\
7607 Raised exceptions may be caught:\n\
7608 \tcatch throw - all exceptions, when thrown\n\
7609 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7610 \tcatch catch - all exceptions, when caught\n\
7611 \tcatch catch <exceptname> - a particular exception, when caught\n\
7612 Thread or process events may be caught:\n\
7613 \tcatch thread_start - any threads, just after creation\n\
7614 \tcatch thread_exit - any threads, just before expiration\n\
7615 \tcatch thread_join - any threads, just after joins\n\
7616 Process events may be caught:\n\
7617 \tcatch start - any processes, just after creation\n\
7618 \tcatch exit - any processes, just before expiration\n\
7619 \tcatch fork - calls to fork()\n\
7620 \tcatch vfork - calls to vfork()\n\
7621 \tcatch exec - calls to exec()\n\
7622 Dynamically-linked library events may be caught:\n\
7623 \tcatch load - loads of any library\n\
7624 \tcatch load <libname> - loads of a particular library\n\
7625 \tcatch unload - unloads of any library\n\
7626 \tcatch unload <libname> - unloads of a particular library\n\
7627 The act of your program's execution stopping may also be caught:\n\
7629 C++ exceptions may be caught:\n\
7630 \tcatch throw - all exceptions, when thrown\n\
7631 \tcatch catch - all exceptions, when caught\n\
7633 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7634 after a fork or vfork is caught.\n\n\
7635 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7637 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7638 "Set temporary catchpoints to catch events.\n\
7639 Args like \"catch\" command.\n\
7640 Like \"catch\" except the catchpoint is only temporary,\n\
7641 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7642 by using \"enable delete\" on the catchpoint number.");
7644 c
= add_com ("watch", class_breakpoint
, watch_command
,
7645 "Set a watchpoint for an expression.\n\
7646 A watchpoint stops execution of your program whenever the value of\n\
7647 an expression changes.");
7648 set_cmd_completer (c
, location_completer
);
7650 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
7651 "Set a read watchpoint for an expression.\n\
7652 A watchpoint stops execution of your program whenever the value of\n\
7653 an expression is read.");
7654 set_cmd_completer (c
, location_completer
);
7656 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
7657 "Set a watchpoint for an expression.\n\
7658 A watchpoint stops execution of your program whenever the value of\n\
7659 an expression is either read or written.");
7660 set_cmd_completer (c
, location_completer
);
7662 add_info ("watchpoints", breakpoints_info
,
7663 "Synonym for ``info breakpoints''.");
7666 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
7667 (char *) &can_use_hw_watchpoints
,
7668 "Set debugger's willingness to use watchpoint hardware.\n\
7669 If zero, gdb will not use hardware for new watchpoints, even if\n\
7670 such is available. (However, any hardware watchpoints that were\n\
7671 created before setting this to nonzero, will continue to use watchpoint\n\
7674 add_show_from_set (c
, &showlist
);
7676 can_use_hw_watchpoints
= 1;