1 /* Everything about breakpoints, for GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
5 Free Software Foundation, Inc.
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., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, 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"
55 #include "exceptions.h"
58 #include "gdb-events.h"
59 #include "mi/mi-common.h"
61 /* Prototypes for local functions. */
63 static void until_break_command_continuation (struct continuation_arg
*arg
);
65 static void catch_command_1 (char *, int, int);
67 static void enable_delete_command (char *, int);
69 static void enable_delete_breakpoint (struct breakpoint
*);
71 static void enable_once_command (char *, int);
73 static void enable_once_breakpoint (struct breakpoint
*);
75 static void disable_command (char *, int);
77 static void enable_command (char *, int);
79 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
81 static void ignore_command (char *, int);
83 static int breakpoint_re_set_one (void *);
85 static void clear_command (char *, int);
87 static void catch_command (char *, int);
89 static void watch_command (char *, int);
91 static int can_use_hardware_watchpoint (struct value
*);
93 static int break_command_1 (char *, int, int, struct breakpoint
*);
95 static void mention (struct breakpoint
*);
97 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
99 static void check_duplicates (struct breakpoint
*);
101 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
103 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
,
106 static void describe_other_breakpoints (CORE_ADDR
, asection
*, int);
108 static void breakpoints_info (char *, int);
110 static void breakpoint_1 (int, int);
112 static bpstat
bpstat_alloc (struct breakpoint
*, bpstat
);
114 static int breakpoint_cond_eval (void *);
116 static void cleanup_executing_breakpoints (void *);
118 static void commands_command (char *, int);
120 static void condition_command (char *, int);
122 static int get_number_trailer (char **, int);
124 void set_breakpoint_count (int);
133 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
135 static enum print_stop_action
print_it_typical (bpstat
);
137 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
141 enum exception_event_kind kind
;
144 args_for_catchpoint_enable
;
146 static int watchpoint_check (void *);
148 static int cover_target_enable_exception_callback (void *);
150 static void maintenance_info_breakpoints (char *, int);
152 static void create_longjmp_breakpoint (char *);
154 static void create_overlay_event_breakpoint (char *);
156 static int hw_breakpoint_used_count (void);
158 static int hw_watchpoint_used_count (enum bptype
, int *);
160 static void hbreak_command (char *, int);
162 static void thbreak_command (char *, int);
164 static void watch_command_1 (char *, int, int);
166 static void rwatch_command (char *, int);
168 static void awatch_command (char *, int);
170 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
172 static void solib_load_unload_1 (char *hookname
,
175 char *cond_string
, enum bptype bp_kind
);
177 static void create_fork_vfork_event_catchpoint (int tempflag
,
179 enum bptype bp_kind
);
181 static void stop_command (char *arg
, int from_tty
);
183 static void stopin_command (char *arg
, int from_tty
);
185 static void stopat_command (char *arg
, int from_tty
);
187 static char *ep_find_event_name_end (char *arg
);
189 static char *ep_parse_optional_if_clause (char **arg
);
191 static char *ep_parse_optional_filename (char **arg
);
193 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
194 enum exception_event_kind ex_event
,
195 struct symtab_and_line
*sal
);
197 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
198 char *arg
, int tempflag
, int from_tty
);
200 static void tcatch_command (char *arg
, int from_tty
);
202 static void ep_skip_leading_whitespace (char **s
);
204 /* Prototypes for exported functions. */
206 /* If FALSE, gdb will not use hardware support for watchpoints, even
207 if such is available. */
208 static int can_use_hw_watchpoints
;
211 show_can_use_hw_watchpoints (struct ui_file
*file
, int from_tty
,
212 struct cmd_list_element
*c
,
215 fprintf_filtered (file
, _("\
216 Debugger's willingness to use watchpoint hardware is %s.\n"),
220 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
221 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
222 for unrecognized breakpoint locations.
223 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
224 static enum auto_boolean pending_break_support
;
226 show_pending_break_support (struct ui_file
*file
, int from_tty
,
227 struct cmd_list_element
*c
,
230 fprintf_filtered (file
, _("\
231 Debugger's behavior regarding pending breakpoints is %s.\n"),
235 /* If 1, gdb will automatically use hardware breakpoints for breakpoints
236 set with "break" but falling in read-only memory.
237 If 0, gdb will warn about such breakpoints, but won't automatically
238 use hardware breakpoints. */
239 static int automatic_hardware_breakpoints
;
241 show_automatic_hardware_breakpoints (struct ui_file
*file
, int from_tty
,
242 struct cmd_list_element
*c
,
245 fprintf_filtered (file
, _("\
246 Automatic usage of hardware breakpoints is %s.\n"),
251 void _initialize_breakpoint (void);
253 extern int addressprint
; /* Print machine addresses? */
255 /* Are we executing breakpoint commands? */
256 static int executing_breakpoint_commands
;
258 /* Are overlay event breakpoints enabled? */
259 static int overlay_events_enabled
;
261 /* Walk the following statement or block through all breakpoints.
262 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
265 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
267 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
268 for (B = breakpoint_chain; \
269 B ? (TMP=B->next, 1): 0; \
272 /* Similar iterators for the low-level breakpoints. */
274 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->next)
276 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
277 for (B = bp_location_chain; \
278 B ? (TMP=B->next, 1): 0; \
281 /* True if breakpoint hit counts should be displayed in breakpoint info. */
283 int show_breakpoint_hit_counts
= 1;
285 /* Chains of all breakpoints defined. */
287 struct breakpoint
*breakpoint_chain
;
289 struct bp_location
*bp_location_chain
;
291 /* Number of last breakpoint made. */
293 int breakpoint_count
;
295 /* Pointer to current exception event record */
296 static struct exception_event_record
*current_exception_event
;
298 /* Indicator of whether exception catchpoints should be nuked between
299 runs of a program. */
300 int deprecated_exception_catchpoints_are_fragile
= 0;
302 /* Indicator of when exception catchpoints set-up should be
303 reinitialized -- e.g. when program is re-run. */
304 int deprecated_exception_support_initialized
= 0;
306 /* This function returns a pointer to the string representation of the
307 pathname of the dynamically-linked library that has just been
310 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
311 or undefined results are guaranteed.
313 This string's contents are only valid immediately after the
314 inferior has stopped in the dynamic linker hook, and becomes
315 invalid as soon as the inferior is continued. Clients should make
316 a copy of this string if they wish to continue the inferior and
317 then access the string. */
319 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
320 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
323 /* This function returns a pointer to the string representation of the
324 pathname of the dynamically-linked library that has just been
327 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
328 TRUE, or undefined results are guaranteed.
330 This string's contents are only valid immediately after the
331 inferior has stopped in the dynamic linker hook, and becomes
332 invalid as soon as the inferior is continued. Clients should make
333 a copy of this string if they wish to continue the inferior and
334 then access the string. */
336 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
337 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
340 /* This function is called by the "catch load" command. It allows the
341 debugger to be notified by the dynamic linker when a specified
342 library file (or any library file, if filename is NULL) is loaded. */
344 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
345 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
346 error (_("catch of library loads not yet implemented on this platform"))
349 /* This function is called by the "catch unload" command. It allows
350 the debugger to be notified by the dynamic linker when a specified
351 library file (or any library file, if filename is NULL) is
354 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
355 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid, tempflag, filename, cond_string) \
356 error (_("catch of library unloads not yet implemented on this platform"))
359 /* Return whether a breakpoint is an active enabled breakpoint. */
361 breakpoint_enabled (struct breakpoint
*b
)
363 return (b
->enable_state
== bp_enabled
&& !b
->pending
);
366 /* Set breakpoint count to NUM. */
369 set_breakpoint_count (int num
)
371 breakpoint_count
= num
;
372 set_internalvar (lookup_internalvar ("bpnum"),
373 value_from_longest (builtin_type_int
, (LONGEST
) num
));
376 /* Used in run_command to zero the hit count when a new run starts. */
379 clear_breakpoint_hit_counts (void)
381 struct breakpoint
*b
;
387 /* Default address, symtab and line to put a breakpoint at
388 for "break" command with no arg.
389 if default_breakpoint_valid is zero, the other three are
390 not valid, and "break" with no arg is an error.
392 This set by print_stack_frame, which calls set_default_breakpoint. */
394 int default_breakpoint_valid
;
395 CORE_ADDR default_breakpoint_address
;
396 struct symtab
*default_breakpoint_symtab
;
397 int default_breakpoint_line
;
399 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
400 Advance *PP after the string and any trailing whitespace.
402 Currently the string can either be a number or "$" followed by the name
403 of a convenience variable. Making it an expression wouldn't work well
404 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
406 TRAILER is a character which can be found after the number; most
407 commonly this is `-'. If you don't want a trailer, use \0. */
409 get_number_trailer (char **pp
, int trailer
)
411 int retval
= 0; /* default */
415 /* Empty line means refer to the last breakpoint. */
416 return breakpoint_count
;
419 /* Make a copy of the name, so we can null-terminate it
420 to pass to lookup_internalvar(). */
425 while (isalnum (*p
) || *p
== '_')
427 varname
= (char *) alloca (p
- start
+ 1);
428 strncpy (varname
, start
, p
- start
);
429 varname
[p
- start
] = '\0';
430 val
= value_of_internalvar (lookup_internalvar (varname
));
431 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_INT
)
432 retval
= (int) value_as_long (val
);
435 printf_filtered (_("Convenience variable must have integer value.\n"));
443 while (*p
>= '0' && *p
<= '9')
446 /* There is no number here. (e.g. "cond a == b"). */
448 /* Skip non-numeric token */
449 while (*p
&& !isspace((int) *p
))
451 /* Return zero, which caller must interpret as error. */
457 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
459 /* Trailing junk: return 0 and let caller print error msg. */
460 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
471 /* Like get_number_trailer, but don't allow a trailer. */
473 get_number (char **pp
)
475 return get_number_trailer (pp
, '\0');
478 /* Parse a number or a range.
479 * A number will be of the form handled by get_number.
480 * A range will be of the form <number1> - <number2>, and
481 * will represent all the integers between number1 and number2,
484 * While processing a range, this fuction is called iteratively;
485 * At each call it will return the next value in the range.
487 * At the beginning of parsing a range, the char pointer PP will
488 * be advanced past <number1> and left pointing at the '-' token.
489 * Subsequent calls will not advance the pointer until the range
490 * is completed. The call that completes the range will advance
491 * pointer PP past <number2>.
495 get_number_or_range (char **pp
)
497 static int last_retval
, end_value
;
498 static char *end_ptr
;
499 static int in_range
= 0;
503 /* Default case: pp is pointing either to a solo number,
504 or to the first number of a range. */
505 last_retval
= get_number_trailer (pp
, '-');
510 /* This is the start of a range (<number1> - <number2>).
511 Skip the '-', parse and remember the second number,
512 and also remember the end of the final token. */
516 while (isspace ((int) *end_ptr
))
517 end_ptr
++; /* skip white space */
518 end_value
= get_number (temp
);
519 if (end_value
< last_retval
)
521 error (_("inverted range"));
523 else if (end_value
== last_retval
)
525 /* degenerate range (number1 == number2). Advance the
526 token pointer so that the range will be treated as a
535 error (_("negative value"));
538 /* pp points to the '-' that betokens a range. All
539 number-parsing has already been done. Return the next
540 integer value (one greater than the saved previous value).
541 Do not advance the token pointer 'pp' until the end of range
544 if (++last_retval
== end_value
)
546 /* End of range reached; advance token pointer. */
556 /* condition N EXP -- set break condition of breakpoint N to EXP. */
559 condition_command (char *arg
, int from_tty
)
561 struct breakpoint
*b
;
566 error_no_arg (_("breakpoint number"));
569 bnum
= get_number (&p
);
571 error (_("Bad breakpoint argument: '%s'"), arg
);
574 if (b
->number
== bnum
)
581 if (b
->cond_string
!= NULL
)
582 xfree (b
->cond_string
);
587 b
->cond_string
= NULL
;
589 printf_filtered (_("Breakpoint %d now unconditional.\n"), bnum
);
594 /* I don't know if it matters whether this is the string the user
595 typed in or the decompiled expression. */
596 b
->cond_string
= savestring (arg
, strlen (arg
));
599 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
601 error (_("Junk at end of expression"));
604 breakpoints_changed ();
605 breakpoint_modify_event (b
->number
);
609 error (_("No breakpoint number %d."), bnum
);
613 commands_command (char *arg
, int from_tty
)
615 struct breakpoint
*b
;
618 struct command_line
*l
;
620 /* If we allowed this, we would have problems with when to
621 free the storage, if we change the commands currently
624 if (executing_breakpoint_commands
)
625 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
628 bnum
= get_number (&p
);
631 error (_("Unexpected extra arguments following breakpoint number."));
634 if (b
->number
== bnum
)
636 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
638 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
639 l
= read_command_lines (tmpbuf
, from_tty
);
640 do_cleanups (cleanups
);
641 free_command_lines (&b
->commands
);
643 breakpoints_changed ();
644 breakpoint_modify_event (b
->number
);
647 error (_("No breakpoint number %d."), bnum
);
650 /* Like target_read_memory() but if breakpoints are inserted, return
651 the shadow contents instead of the breakpoints themselves.
653 Read "memory data" from whatever target or inferior we have.
654 Returns zero if successful, errno value if not. EIO is used
655 for address out of bounds. If breakpoints are inserted, returns
656 shadow contents, not the breakpoints themselves. From breakpoint.c. */
659 read_memory_nobpt (CORE_ADDR memaddr
, gdb_byte
*myaddr
, unsigned len
)
662 struct bp_location
*b
;
663 CORE_ADDR bp_addr
= 0;
666 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
667 /* No breakpoints on this machine. */
668 return target_read_memory (memaddr
, myaddr
, len
);
672 if (b
->owner
->type
== bp_none
)
673 warning (_("reading through apparently deleted breakpoint #%d?"),
676 if (b
->loc_type
!= bp_loc_software_breakpoint
)
680 /* Addresses and length of the part of the breakpoint that
682 bp_addr
= b
->target_info
.placed_address
;
683 bp_size
= b
->target_info
.shadow_len
;
685 /* bp isn't valid, or doesn't shadow memory. */
687 if (bp_addr
+ bp_size
<= memaddr
)
688 /* The breakpoint is entirely before the chunk of memory we
691 if (bp_addr
>= memaddr
+ len
)
692 /* The breakpoint is entirely after the chunk of memory we are
695 /* Copy the breakpoint from the shadow contents, and recurse for
696 the things before and after. */
698 /* Offset within shadow_contents. */
701 if (bp_addr
< memaddr
)
703 /* Only copy the second part of the breakpoint. */
704 bp_size
-= memaddr
- bp_addr
;
705 bptoffset
= memaddr
- bp_addr
;
709 if (bp_addr
+ bp_size
> memaddr
+ len
)
711 /* Only copy the first part of the breakpoint. */
712 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
715 memcpy (myaddr
+ bp_addr
- memaddr
,
716 b
->target_info
.shadow_contents
+ bptoffset
, bp_size
);
718 if (bp_addr
> memaddr
)
720 /* Copy the section of memory before the breakpoint. */
721 status
= read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
726 if (bp_addr
+ bp_size
< memaddr
+ len
)
728 /* Copy the section of memory after the breakpoint. */
729 status
= read_memory_nobpt (bp_addr
+ bp_size
,
730 myaddr
+ bp_addr
+ bp_size
- memaddr
,
731 memaddr
+ len
- (bp_addr
+ bp_size
));
738 /* Nothing overlaps. Just call read_memory_noerr. */
739 return target_read_memory (memaddr
, myaddr
, len
);
743 /* A wrapper function for inserting catchpoints. */
745 insert_catchpoint (struct ui_out
*uo
, void *args
)
747 struct breakpoint
*b
= (struct breakpoint
*) args
;
753 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
756 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
759 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
762 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
767 /* Helper routine: free the value chain for a breakpoint (watchpoint). */
770 free_valchain (struct bp_location
*b
)
775 /* Free the saved value chain. We will construct a new one
776 the next time the watchpoint is inserted. */
777 for (v
= b
->owner
->val_chain
; v
; v
= n
)
782 b
->owner
->val_chain
= NULL
;
785 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
786 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
787 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
789 NOTE drow/2003-09-09: This routine could be broken down to an object-style
790 method for each breakpoint or catchpoint type. */
792 insert_bp_location (struct bp_location
*bpt
,
793 struct ui_file
*tmp_error_stream
,
794 int *disabled_breaks
, int *process_warning
,
795 int *hw_breakpoint_error
)
799 /* Permanent breakpoints cannot be inserted or removed. Disabled
800 breakpoints should not be inserted. */
801 if (!breakpoint_enabled (bpt
->owner
))
804 if (bpt
->inserted
|| bpt
->duplicate
)
807 /* Initialize the target-specific information. */
808 memset (&bpt
->target_info
, 0, sizeof (bpt
->target_info
));
809 bpt
->target_info
.placed_address
= bpt
->address
;
811 if (bpt
->loc_type
== bp_loc_software_breakpoint
812 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
814 if (bpt
->owner
->type
!= bp_hardware_breakpoint
)
816 /* If the explicitly specified breakpoint type
817 is not hardware breakpoint, check the memory map to see
818 if the breakpoint address is in read only memory or not.
819 Two important cases are:
820 - location type is not hardware breakpoint, memory
821 is readonly. We change the type of the location to
823 - location type is hardware breakpoint, memory is read-write.
824 This means we've previously made the location hardware one, but
825 then the memory map changed, so we undo.
827 When breakpoints are removed, remove_breakpoints will
828 use location types we've just set here, the only possible
829 problem is that memory map has changed during running program,
830 but it's not going to work anyway with current gdb. */
831 struct mem_region
*mr
832 = lookup_mem_region (bpt
->target_info
.placed_address
);
836 if (automatic_hardware_breakpoints
)
839 enum bp_loc_type new_type
;
841 if (mr
->attrib
.mode
!= MEM_RW
)
842 new_type
= bp_loc_hardware_breakpoint
;
844 new_type
= bp_loc_software_breakpoint
;
846 if (new_type
!= bpt
->loc_type
)
849 bpt
->loc_type
= new_type
;
852 fprintf_filtered (gdb_stdout
, _("\
853 Note: automatically using hardware breakpoints for read-only addresses.\n"));
858 else if (bpt
->loc_type
== bp_loc_software_breakpoint
859 && mr
->attrib
.mode
!= MEM_RW
)
860 warning (_("cannot set software breakpoint at readonly address %s"),
861 paddr (bpt
->address
));
865 /* First check to see if we have to handle an overlay. */
866 if (overlay_debugging
== ovly_off
867 || bpt
->section
== NULL
868 || !(section_is_overlay (bpt
->section
)))
870 /* No overlay handling: just set the breakpoint. */
872 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
873 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
875 val
= target_insert_breakpoint (&bpt
->target_info
);
879 /* This breakpoint is in an overlay section.
880 Shall we set a breakpoint at the LMA? */
881 if (!overlay_events_enabled
)
883 /* Yes -- overlay event support is not active,
884 so we must try to set a breakpoint at the LMA.
885 This will not work for a hardware breakpoint. */
886 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
887 warning (_("hardware breakpoint %d not supported in overlay!"),
891 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
893 /* Set a software (trap) breakpoint at the LMA. */
894 bpt
->overlay_target_info
= bpt
->target_info
;
895 bpt
->overlay_target_info
.placed_address
= addr
;
896 val
= target_insert_breakpoint (&bpt
->overlay_target_info
);
898 fprintf_unfiltered (tmp_error_stream
,
899 "Overlay breakpoint %d failed: in ROM?",
903 /* Shall we set a breakpoint at the VMA? */
904 if (section_is_mapped (bpt
->section
))
906 /* Yes. This overlay section is mapped into memory. */
907 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
908 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
910 val
= target_insert_breakpoint (&bpt
->target_info
);
914 /* No. This breakpoint will not be inserted.
915 No error, but do not mark the bp as 'inserted'. */
922 /* Can't set the breakpoint. */
924 #if defined (DISABLE_UNSETTABLE_BREAK)
925 DISABLE_UNSETTABLE_BREAK (bpt
->address
)
927 solib_address (bpt
->address
)
931 /* See also: disable_breakpoints_in_shlibs. */
933 bpt
->owner
->enable_state
= bp_shlib_disabled
;
934 if (!*disabled_breaks
)
936 fprintf_unfiltered (tmp_error_stream
,
937 "Cannot insert breakpoint %d.\n",
939 fprintf_unfiltered (tmp_error_stream
,
940 "Temporarily disabling shared library breakpoints:\n");
942 *disabled_breaks
= 1;
943 fprintf_unfiltered (tmp_error_stream
,
944 "breakpoint #%d\n", bpt
->owner
->number
);
948 #ifdef ONE_PROCESS_WRITETEXT
949 *process_warning
= 1;
951 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
953 *hw_breakpoint_error
= 1;
954 fprintf_unfiltered (tmp_error_stream
,
955 "Cannot insert hardware breakpoint %d.\n",
960 fprintf_unfiltered (tmp_error_stream
,
961 "Cannot insert breakpoint %d.\n",
963 fprintf_filtered (tmp_error_stream
,
964 "Error accessing memory address ");
965 deprecated_print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
966 fprintf_filtered (tmp_error_stream
, ": %s.\n",
967 safe_strerror (val
));
978 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
979 /* NOTE drow/2003-09-08: This state only exists for removing
980 watchpoints. It's not clear that it's necessary... */
981 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
983 /* FIXME drow/2003-09-08: This code sets multiple hardware watchpoints
984 based on the expression. Ideally this should happen at a higher level,
985 and there should be one bp_location for each computed address we
986 must watch. As soon as a many-to-one mapping is available I'll
989 int within_current_scope
;
990 struct value
*mark
= value_mark ();
992 struct frame_id saved_frame_id
;
994 /* Save the current frame's ID so we can restore it after
995 evaluating the watchpoint expression on its own frame. */
996 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
997 took a frame parameter, so that we didn't have to change the
999 saved_frame_id
= get_frame_id (deprecated_selected_frame
);
1001 /* Determine if the watchpoint is within scope. */
1002 if (bpt
->owner
->exp_valid_block
== NULL
)
1003 within_current_scope
= 1;
1006 struct frame_info
*fi
;
1007 fi
= frame_find_by_id (bpt
->owner
->watchpoint_frame
);
1008 within_current_scope
= (fi
!= NULL
);
1009 if (within_current_scope
)
1013 if (within_current_scope
)
1015 free_valchain (bpt
);
1017 /* Evaluate the expression and cut the chain of values
1018 produced off from the value chain.
1020 Make sure the value returned isn't lazy; we use
1021 laziness to determine what memory GDB actually needed
1022 in order to compute the value of the expression. */
1023 v
= evaluate_expression (bpt
->owner
->exp
);
1025 value_release_to_mark (mark
);
1027 bpt
->owner
->val_chain
= v
;
1030 /* Look at each value on the value chain. */
1031 for (; v
; v
= value_next (v
))
1033 /* If it's a memory location, and GDB actually needed
1034 its contents to evaluate the expression, then we
1036 if (VALUE_LVAL (v
) == lval_memory
1037 && ! value_lazy (v
))
1039 struct type
*vtype
= check_typedef (value_type (v
));
1041 /* We only watch structs and arrays if user asked
1042 for it explicitly, never if they just happen to
1043 appear in the middle of some value chain. */
1044 if (v
== bpt
->owner
->val_chain
1045 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1046 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1051 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
1052 len
= TYPE_LENGTH (value_type (v
));
1054 if (bpt
->owner
->type
== bp_read_watchpoint
)
1056 else if (bpt
->owner
->type
== bp_access_watchpoint
)
1059 val
= target_insert_watchpoint (addr
, len
, type
);
1062 /* Don't exit the loop, try to insert
1063 every value on the value chain. That's
1064 because we will be removing all the
1065 watches below, and removing a
1066 watchpoint we didn't insert could have
1074 /* Failure to insert a watchpoint on any memory value in the
1075 value chain brings us here. */
1078 remove_breakpoint (bpt
, mark_uninserted
);
1079 *hw_breakpoint_error
= 1;
1080 fprintf_unfiltered (tmp_error_stream
,
1081 "Could not insert hardware watchpoint %d.\n",
1082 bpt
->owner
->number
);
1088 printf_filtered (_("\
1089 Hardware watchpoint %d deleted because the program has left the block \n\
1090 in which its expression is valid.\n"),
1091 bpt
->owner
->number
);
1092 if (bpt
->owner
->related_breakpoint
)
1093 bpt
->owner
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1094 bpt
->owner
->disposition
= disp_del_at_next_stop
;
1097 /* Restore the selected frame. */
1098 select_frame (frame_find_by_id (saved_frame_id
));
1103 else if (ep_is_exception_catchpoint (bpt
->owner
))
1105 /* FIXME drow/2003-09-09: This code sets both a catchpoint and a
1106 breakpoint. Once again, it would be better if this was represented
1107 as two bp_locations. */
1109 /* If we get here, we must have a callback mechanism for exception
1110 events -- with g++ style embedded label support, we insert
1111 ordinary breakpoints and not catchpoints. */
1112 val
= target_insert_breakpoint (&bpt
->target_info
);
1115 /* Couldn't set breakpoint for some reason */
1116 fprintf_unfiltered (tmp_error_stream
,
1117 "Cannot insert catchpoint %d; disabling it.\n",
1118 bpt
->owner
->number
);
1119 fprintf_filtered (tmp_error_stream
,
1120 "Error accessing memory address ");
1121 deprecated_print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
1122 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1123 safe_strerror (val
));
1124 bpt
->owner
->enable_state
= bp_disabled
;
1128 /* Bp set, now make sure callbacks are enabled */
1129 /* Format possible error msg */
1130 char *message
= xstrprintf ("Error inserting catchpoint %d:\n",
1131 bpt
->owner
->number
);
1132 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
1134 args_for_catchpoint_enable args
;
1135 args
.kind
= bpt
->owner
->type
== bp_catch_catch
?
1136 EX_EVENT_CATCH
: EX_EVENT_THROW
;
1138 val
= catch_errors (cover_target_enable_exception_callback
,
1139 &args
, message
, RETURN_MASK_ALL
);
1140 do_cleanups (cleanups
);
1141 if (val
!= 0 && val
!= -1)
1144 /* Check if something went wrong; val == 0 can be ignored */
1147 /* something went wrong */
1148 fprintf_unfiltered (tmp_error_stream
,
1149 "Cannot insert catchpoint %d; disabling it.\n",
1150 bpt
->owner
->number
);
1151 bpt
->owner
->enable_state
= bp_disabled
;
1158 else if (bpt
->owner
->type
== bp_catch_fork
1159 || bpt
->owner
->type
== bp_catch_vfork
1160 || bpt
->owner
->type
== bp_catch_exec
)
1162 struct gdb_exception e
= catch_exception (uiout
, insert_catchpoint
,
1163 bpt
->owner
, RETURN_MASK_ERROR
);
1164 exception_fprintf (gdb_stderr
, e
, "warning: inserting catchpoint %d: ",
1165 bpt
->owner
->number
);
1167 bpt
->owner
->enable_state
= bp_disabled
;
1171 /* We've already printed an error message if there was a problem
1172 inserting this catchpoint, and we've disabled the catchpoint,
1173 so just return success. */
1180 /* insert_breakpoints is used when starting or continuing the program.
1181 remove_breakpoints is used when the program stops.
1182 Both return zero if successful,
1183 or an `errno' value if could not write the inferior. */
1186 insert_breakpoints (void)
1188 struct bp_location
*b
, *temp
;
1189 int return_val
= 0; /* return success code. */
1191 int disabled_breaks
= 0;
1192 int hw_breakpoint_error
= 0;
1193 int process_warning
= 0;
1195 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1196 make_cleanup_ui_file_delete (tmp_error_stream
);
1198 /* Explicitly mark the warning -- this will only be printed if
1199 there was an error. */
1200 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1202 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1204 /* Permanent breakpoints cannot be inserted or removed. Disabled
1205 breakpoints should not be inserted. */
1206 if (!breakpoint_enabled (b
->owner
))
1209 /* There is no point inserting thread-specific breakpoints if the
1210 thread no longer exists. */
1211 if (b
->owner
->thread
!= -1
1212 && !valid_thread_id (b
->owner
->thread
))
1215 /* FIXME drow/2003-10-07: This code should be pushed elsewhere when
1216 hardware watchpoints are split into multiple loc breakpoints. */
1217 if ((b
->loc_type
== bp_loc_hardware_watchpoint
1218 || b
->owner
->type
== bp_watchpoint
) && !b
->owner
->val
)
1221 val
= evaluate_expression (b
->owner
->exp
);
1222 release_value (val
);
1223 if (value_lazy (val
))
1224 value_fetch_lazy (val
);
1225 b
->owner
->val
= val
;
1228 val
= insert_bp_location (b
, tmp_error_stream
,
1229 &disabled_breaks
, &process_warning
,
1230 &hw_breakpoint_error
);
1237 /* If a hardware breakpoint or watchpoint was inserted, add a
1238 message about possibly exhausted resources. */
1239 if (hw_breakpoint_error
)
1241 fprintf_unfiltered (tmp_error_stream
,
1242 "Could not insert hardware breakpoints:\n\
1243 You may have requested too many hardware breakpoints/watchpoints.\n");
1245 #ifdef ONE_PROCESS_WRITETEXT
1246 if (process_warning
)
1247 fprintf_unfiltered (tmp_error_stream
,
1248 "The same program may be running in another process.");
1250 target_terminal_ours_for_output ();
1251 error_stream (tmp_error_stream
);
1257 remove_breakpoints (void)
1259 struct bp_location
*b
;
1262 ALL_BP_LOCATIONS (b
)
1266 val
= remove_breakpoint (b
, mark_uninserted
);
1275 remove_hw_watchpoints (void)
1277 struct bp_location
*b
;
1280 ALL_BP_LOCATIONS (b
)
1282 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1284 val
= remove_breakpoint (b
, mark_uninserted
);
1293 reattach_breakpoints (int pid
)
1295 struct bp_location
*b
;
1297 struct cleanup
*old_chain
= save_inferior_ptid ();
1299 /* Set inferior_ptid; remove_breakpoint uses this global. */
1300 inferior_ptid
= pid_to_ptid (pid
);
1301 ALL_BP_LOCATIONS (b
)
1305 remove_breakpoint (b
, mark_inserted
);
1306 /* Note: since we insert a breakpoint right after removing,
1307 any decisions about automatically using hardware breakpoints
1308 made in insert_bp_location are preserved. */
1309 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1310 val
= target_insert_hw_breakpoint (&b
->target_info
);
1312 val
= target_insert_breakpoint (&b
->target_info
);
1313 /* FIXME drow/2003-10-07: This doesn't handle any other kinds of
1314 breakpoints. It's wrong for watchpoints, for example. */
1317 do_cleanups (old_chain
);
1322 do_cleanups (old_chain
);
1327 update_breakpoints_after_exec (void)
1329 struct breakpoint
*b
;
1330 struct breakpoint
*temp
;
1332 /* Doing this first prevents the badness of having delete_breakpoint()
1333 write a breakpoint's current "shadow contents" to lift the bp. That
1334 shadow is NOT valid after an exec()! */
1335 mark_breakpoints_out ();
1337 ALL_BREAKPOINTS_SAFE (b
, temp
)
1339 /* Solib breakpoints must be explicitly reset after an exec(). */
1340 if (b
->type
== bp_shlib_event
)
1342 delete_breakpoint (b
);
1346 /* Thread event breakpoints must be set anew after an exec(),
1347 as must overlay event breakpoints. */
1348 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1350 delete_breakpoint (b
);
1354 /* Step-resume breakpoints are meaningless after an exec(). */
1355 if (b
->type
== bp_step_resume
)
1357 delete_breakpoint (b
);
1361 /* Ditto the sigtramp handler breakpoints. */
1362 if (b
->type
== bp_through_sigtramp
)
1364 delete_breakpoint (b
);
1368 /* Ditto the exception-handling catchpoints. */
1369 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1371 delete_breakpoint (b
);
1375 /* Don't delete an exec catchpoint, because else the inferior
1376 won't stop when it ought!
1378 Similarly, we probably ought to keep vfork catchpoints, 'cause
1379 on this target, we may not be able to stop when the vfork is
1380 seen, but only when the subsequent exec is seen. (And because
1381 deleting fork catchpoints here but not vfork catchpoints will
1382 seem mysterious to users, keep those too.)
1384 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1385 target address field, if any, is sufficient to have it be reset
1386 automagically. Certainly on HP-UX that's true.
1388 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1389 valid code address on some platforms (like the mn10300
1390 simulators). We shouldn't assign any special interpretation to
1391 a breakpoint with a zero address. And in fact, GDB doesn't ---
1392 I can't see what that comment above is talking about. As far
1393 as I can tell, setting the address of a
1394 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1395 is meaningless, since those are implemented with HP-UX kernel
1396 hackery, not by storing breakpoint instructions somewhere. */
1397 if ((b
->type
== bp_catch_exec
) ||
1398 (b
->type
== bp_catch_vfork
) ||
1399 (b
->type
== bp_catch_fork
))
1401 b
->loc
->address
= (CORE_ADDR
) 0;
1405 /* bp_finish is a special case. The only way we ought to be able
1406 to see one of these when an exec() has happened, is if the user
1407 caught a vfork, and then said "finish". Ordinarily a finish just
1408 carries them to the call-site of the current callee, by setting
1409 a temporary bp there and resuming. But in this case, the finish
1410 will carry them entirely through the vfork & exec.
1412 We don't want to allow a bp_finish to remain inserted now. But
1413 we can't safely delete it, 'cause finish_command has a handle to
1414 the bp on a bpstat, and will later want to delete it. There's a
1415 chance (and I've seen it happen) that if we delete the bp_finish
1416 here, that its storage will get reused by the time finish_command
1417 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1418 We really must allow finish_command to delete a bp_finish.
1420 In the absense of a general solution for the "how do we know
1421 it's safe to delete something others may have handles to?"
1422 problem, what we'll do here is just uninsert the bp_finish, and
1423 let finish_command delete it.
1425 (We know the bp_finish is "doomed" in the sense that it's
1426 momentary, and will be deleted as soon as finish_command sees
1427 the inferior stopped. So it doesn't matter that the bp's
1428 address is probably bogus in the new a.out, unlike e.g., the
1429 solib breakpoints.) */
1431 if (b
->type
== bp_finish
)
1436 /* Without a symbolic address, we have little hope of the
1437 pre-exec() address meaning the same thing in the post-exec()
1439 if (b
->addr_string
== NULL
)
1441 delete_breakpoint (b
);
1445 /* If this breakpoint has survived the above battery of checks, then
1446 it must have a symbolic address. Be sure that it gets reevaluated
1447 to a target address, rather than reusing the old evaluation.
1449 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1450 for bp_catch_exec and friends, I'm pretty sure this is entirely
1451 unnecessary. A call to breakpoint_re_set_one always recomputes
1452 the breakpoint's address from scratch, or deletes it if it can't.
1453 So I think this assignment could be deleted without effect. */
1454 b
->loc
->address
= (CORE_ADDR
) 0;
1456 /* FIXME what about longjmp breakpoints? Re-create them here? */
1457 create_overlay_event_breakpoint ("_ovly_debug_event");
1461 detach_breakpoints (int pid
)
1463 struct bp_location
*b
;
1465 struct cleanup
*old_chain
= save_inferior_ptid ();
1467 if (pid
== PIDGET (inferior_ptid
))
1468 error (_("Cannot detach breakpoints of inferior_ptid"));
1470 /* Set inferior_ptid; remove_breakpoint uses this global. */
1471 inferior_ptid
= pid_to_ptid (pid
);
1472 ALL_BP_LOCATIONS (b
)
1476 val
= remove_breakpoint (b
, mark_inserted
);
1479 do_cleanups (old_chain
);
1484 do_cleanups (old_chain
);
1489 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1493 if (b
->owner
->enable_state
== bp_permanent
)
1494 /* Permanent breakpoints cannot be inserted or removed. */
1497 if (b
->owner
->type
== bp_none
)
1498 warning (_("attempted to remove apparently deleted breakpoint #%d?"),
1501 if (b
->loc_type
== bp_loc_software_breakpoint
1502 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1504 /* "Normal" instruction breakpoint: either the standard
1505 trap-instruction bp (bp_breakpoint), or a
1506 bp_hardware_breakpoint. */
1508 /* First check to see if we have to handle an overlay. */
1509 if (overlay_debugging
== ovly_off
1510 || b
->section
== NULL
1511 || !(section_is_overlay (b
->section
)))
1513 /* No overlay handling: just remove the breakpoint. */
1515 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1516 val
= target_remove_hw_breakpoint (&b
->target_info
);
1518 val
= target_remove_breakpoint (&b
->target_info
);
1522 /* This breakpoint is in an overlay section.
1523 Did we set a breakpoint at the LMA? */
1524 if (!overlay_events_enabled
)
1526 /* Yes -- overlay event support is not active, so we
1527 should have set a breakpoint at the LMA. Remove it.
1529 /* Ignore any failures: if the LMA is in ROM, we will
1530 have already warned when we failed to insert it. */
1531 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1532 target_remove_hw_breakpoint (&b
->overlay_target_info
);
1534 target_remove_breakpoint (&b
->overlay_target_info
);
1536 /* Did we set a breakpoint at the VMA?
1537 If so, we will have marked the breakpoint 'inserted'. */
1540 /* Yes -- remove it. Previously we did not bother to
1541 remove the breakpoint if the section had been
1542 unmapped, but let's not rely on that being safe. We
1543 don't know what the overlay manager might do. */
1544 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1545 val
= target_remove_hw_breakpoint (&b
->target_info
);
1547 val
= target_remove_breakpoint (&b
->target_info
);
1551 /* No -- not inserted, so no need to remove. No error. */
1557 b
->inserted
= (is
== mark_inserted
);
1559 else if (b
->loc_type
== bp_loc_hardware_watchpoint
1560 && breakpoint_enabled (b
->owner
)
1566 b
->inserted
= (is
== mark_inserted
);
1567 /* Walk down the saved value chain. */
1568 for (v
= b
->owner
->val_chain
; v
; v
= value_next (v
))
1570 /* For each memory reference remove the watchpoint
1572 if (VALUE_LVAL (v
) == lval_memory
1573 && ! value_lazy (v
))
1575 struct type
*vtype
= check_typedef (value_type (v
));
1577 if (v
== b
->owner
->val_chain
1578 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1579 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1584 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
1585 len
= TYPE_LENGTH (value_type (v
));
1587 if (b
->owner
->type
== bp_read_watchpoint
)
1589 else if (b
->owner
->type
== bp_access_watchpoint
)
1592 val
= target_remove_watchpoint (addr
, len
, type
);
1599 /* Failure to remove any of the hardware watchpoints comes here. */
1600 if ((is
== mark_uninserted
) && (b
->inserted
))
1601 warning (_("Could not remove hardware watchpoint %d."),
1604 else if ((b
->owner
->type
== bp_catch_fork
||
1605 b
->owner
->type
== bp_catch_vfork
||
1606 b
->owner
->type
== bp_catch_exec
)
1607 && breakpoint_enabled (b
->owner
)
1611 switch (b
->owner
->type
)
1614 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1616 case bp_catch_vfork
:
1617 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1620 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1623 warning (_("Internal error, %s line %d."), __FILE__
, __LINE__
);
1628 b
->inserted
= (is
== mark_inserted
);
1630 else if ((b
->owner
->type
== bp_catch_catch
||
1631 b
->owner
->type
== bp_catch_throw
)
1632 && breakpoint_enabled (b
->owner
)
1635 val
= target_remove_breakpoint (&b
->target_info
);
1638 b
->inserted
= (is
== mark_inserted
);
1640 else if (ep_is_exception_catchpoint (b
->owner
)
1641 && b
->inserted
/* sometimes previous insert doesn't happen */
1642 && breakpoint_enabled (b
->owner
)
1645 val
= target_remove_breakpoint (&b
->target_info
);
1649 b
->inserted
= (is
== mark_inserted
);
1655 /* Clear the "inserted" flag in all breakpoints. */
1658 mark_breakpoints_out (void)
1660 struct bp_location
*bpt
;
1662 ALL_BP_LOCATIONS (bpt
)
1666 /* Clear the "inserted" flag in all breakpoints and delete any
1667 breakpoints which should go away between runs of the program.
1669 Plus other such housekeeping that has to be done for breakpoints
1672 Note: this function gets called at the end of a run (by
1673 generic_mourn_inferior) and when a run begins (by
1674 init_wait_for_inferior). */
1679 breakpoint_init_inferior (enum inf_context context
)
1681 struct breakpoint
*b
, *temp
;
1682 struct bp_location
*bpt
;
1683 static int warning_needed
= 0;
1685 ALL_BP_LOCATIONS (bpt
)
1688 ALL_BREAKPOINTS_SAFE (b
, temp
)
1693 case bp_watchpoint_scope
:
1695 /* If the call dummy breakpoint is at the entry point it will
1696 cause problems when the inferior is rerun, so we better
1699 Also get rid of scope breakpoints. */
1700 delete_breakpoint (b
);
1704 case bp_hardware_watchpoint
:
1705 case bp_read_watchpoint
:
1706 case bp_access_watchpoint
:
1708 /* Likewise for watchpoints on local expressions. */
1709 if (b
->exp_valid_block
!= NULL
)
1710 delete_breakpoint (b
);
1711 if (context
== inf_starting
)
1713 /* Reset val field to force reread of starting value
1714 in insert_breakpoints. */
1716 value_free (b
->val
);
1721 /* Likewise for exception catchpoints in dynamic-linked
1722 executables where required */
1723 if (ep_is_exception_catchpoint (b
)
1724 && deprecated_exception_catchpoints_are_fragile
)
1727 delete_breakpoint (b
);
1733 if (deprecated_exception_catchpoints_are_fragile
)
1734 deprecated_exception_support_initialized
= 0;
1736 /* Don't issue the warning unless it's really needed... */
1737 if (warning_needed
&& (context
!= inf_exited
))
1739 warning (_("Exception catchpoints from last run were deleted.\n"
1740 "You must reinsert them explicitly."));
1745 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1746 exists at PC. It returns ordinary_breakpoint_here if it's an
1747 ordinary breakpoint, or permanent_breakpoint_here if it's a
1748 permanent breakpoint.
1749 - When continuing from a location with an ordinary breakpoint, we
1750 actually single step once before calling insert_breakpoints.
1751 - When continuing from a localion with a permanent breakpoint, we
1752 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1753 the target, to advance the PC past the breakpoint. */
1755 enum breakpoint_here
1756 breakpoint_here_p (CORE_ADDR pc
)
1758 struct bp_location
*bpt
;
1759 int any_breakpoint_here
= 0;
1761 ALL_BP_LOCATIONS (bpt
)
1763 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1764 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1767 if ((breakpoint_enabled (bpt
->owner
)
1768 || bpt
->owner
->enable_state
== bp_permanent
)
1769 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1771 if (overlay_debugging
1772 && section_is_overlay (bpt
->section
)
1773 && !section_is_mapped (bpt
->section
))
1774 continue; /* unmapped overlay -- can't be a match */
1775 else if (bpt
->owner
->enable_state
== bp_permanent
)
1776 return permanent_breakpoint_here
;
1778 any_breakpoint_here
= 1;
1782 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1786 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1787 but it only returns true if there is actually a breakpoint inserted
1791 breakpoint_inserted_here_p (CORE_ADDR pc
)
1793 struct bp_location
*bpt
;
1795 ALL_BP_LOCATIONS (bpt
)
1797 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1798 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1802 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1804 if (overlay_debugging
1805 && section_is_overlay (bpt
->section
)
1806 && !section_is_mapped (bpt
->section
))
1807 continue; /* unmapped overlay -- can't be a match */
1816 /* This function returns non-zero iff there is a software breakpoint
1820 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1822 struct bp_location
*bpt
;
1823 int any_breakpoint_here
= 0;
1825 ALL_BP_LOCATIONS (bpt
)
1827 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1830 if ((breakpoint_enabled (bpt
->owner
)
1831 || bpt
->owner
->enable_state
== bp_permanent
)
1833 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1835 if (overlay_debugging
1836 && section_is_overlay (bpt
->section
)
1837 && !section_is_mapped (bpt
->section
))
1838 continue; /* unmapped overlay -- can't be a match */
1847 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1848 PC is valid for process/thread PTID. */
1851 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1853 struct bp_location
*bpt
;
1856 thread
= pid_to_thread_id (ptid
);
1858 ALL_BP_LOCATIONS (bpt
)
1860 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1861 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1864 if ((breakpoint_enabled (bpt
->owner
)
1865 || bpt
->owner
->enable_state
== bp_permanent
)
1866 && bpt
->address
== pc
1867 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1869 if (overlay_debugging
1870 && section_is_overlay (bpt
->section
)
1871 && !section_is_mapped (bpt
->section
))
1872 continue; /* unmapped overlay -- can't be a match */
1882 /* bpstat stuff. External routines' interfaces are documented
1886 ep_is_catchpoint (struct breakpoint
*ep
)
1889 (ep
->type
== bp_catch_load
)
1890 || (ep
->type
== bp_catch_unload
)
1891 || (ep
->type
== bp_catch_fork
)
1892 || (ep
->type
== bp_catch_vfork
)
1893 || (ep
->type
== bp_catch_exec
)
1894 || (ep
->type
== bp_catch_catch
)
1895 || (ep
->type
== bp_catch_throw
);
1897 /* ??rehrauer: Add more kinds here, as are implemented... */
1901 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1904 (ep
->type
== bp_catch_load
)
1905 || (ep
->type
== bp_catch_unload
);
1909 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1912 (ep
->type
== bp_catch_catch
)
1913 || (ep
->type
== bp_catch_throw
);
1916 /* Clear a bpstat so that it says we are not at any breakpoint.
1917 Also free any storage that is part of a bpstat. */
1920 bpstat_clear (bpstat
*bsp
)
1931 if (p
->old_val
!= NULL
)
1932 value_free (p
->old_val
);
1933 free_command_lines (&p
->commands
);
1940 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1941 is part of the bpstat is copied as well. */
1944 bpstat_copy (bpstat bs
)
1948 bpstat retval
= NULL
;
1953 for (; bs
!= NULL
; bs
= bs
->next
)
1955 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1956 memcpy (tmp
, bs
, sizeof (*tmp
));
1957 if (bs
->commands
!= NULL
)
1958 tmp
->commands
= copy_command_lines (bs
->commands
);
1959 if (bs
->old_val
!= NULL
)
1960 tmp
->old_val
= value_copy (bs
->old_val
);
1963 /* This is the first thing in the chain. */
1973 /* Find the bpstat associated with this breakpoint */
1976 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1981 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1983 if (bsp
->breakpoint_at
== breakpoint
)
1989 /* Find a step_resume breakpoint associated with this bpstat.
1990 (If there are multiple step_resume bp's on the list, this function
1991 will arbitrarily pick one.)
1993 It is an error to use this function if BPSTAT doesn't contain a
1994 step_resume breakpoint.
1996 See wait_for_inferior's use of this function. */
1998 bpstat_find_step_resume_breakpoint (bpstat bsp
)
2002 gdb_assert (bsp
!= NULL
);
2004 current_thread
= pid_to_thread_id (inferior_ptid
);
2006 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2008 if ((bsp
->breakpoint_at
!= NULL
) &&
2009 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
2010 (bsp
->breakpoint_at
->thread
== current_thread
||
2011 bsp
->breakpoint_at
->thread
== -1))
2012 return bsp
->breakpoint_at
;
2015 internal_error (__FILE__
, __LINE__
, _("No step_resume breakpoint found."));
2019 /* Return the breakpoint number of the first breakpoint we are stopped
2020 at. *BSP upon return is a bpstat which points to the remaining
2021 breakpoints stopped at (but which is not guaranteed to be good for
2022 anything but further calls to bpstat_num).
2023 Return 0 if passed a bpstat which does not indicate any breakpoints. */
2026 bpstat_num (bpstat
*bsp
)
2028 struct breakpoint
*b
;
2031 return 0; /* No more breakpoint values */
2034 b
= (*bsp
)->breakpoint_at
;
2035 *bsp
= (*bsp
)->next
;
2037 return -1; /* breakpoint that's been deleted since */
2039 return b
->number
; /* We have its number */
2043 /* Modify BS so that the actions will not be performed. */
2046 bpstat_clear_actions (bpstat bs
)
2048 for (; bs
!= NULL
; bs
= bs
->next
)
2050 free_command_lines (&bs
->commands
);
2051 if (bs
->old_val
!= NULL
)
2053 value_free (bs
->old_val
);
2059 /* Stub for cleaning up our state if we error-out of a breakpoint command */
2061 cleanup_executing_breakpoints (void *ignore
)
2063 executing_breakpoint_commands
= 0;
2066 /* Execute all the commands associated with all the breakpoints at this
2067 location. Any of these commands could cause the process to proceed
2068 beyond this point, etc. We look out for such changes by checking
2069 the global "breakpoint_proceeded" after each command. */
2072 bpstat_do_actions (bpstat
*bsp
)
2075 struct cleanup
*old_chain
;
2077 /* Avoid endless recursion if a `source' command is contained
2079 if (executing_breakpoint_commands
)
2082 executing_breakpoint_commands
= 1;
2083 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2086 /* Note that (as of this writing), our callers all appear to
2087 be passing us the address of global stop_bpstat. And, if
2088 our calls to execute_control_command cause the inferior to
2089 proceed, that global (and hence, *bsp) will change.
2091 We must be careful to not touch *bsp unless the inferior
2092 has not proceeded. */
2094 /* This pointer will iterate over the list of bpstat's. */
2097 breakpoint_proceeded
= 0;
2098 for (; bs
!= NULL
; bs
= bs
->next
)
2100 struct command_line
*cmd
;
2101 struct cleanup
*this_cmd_tree_chain
;
2103 /* Take ownership of the BSP's command tree, if it has one.
2105 The command tree could legitimately contain commands like
2106 'step' and 'next', which call clear_proceed_status, which
2107 frees stop_bpstat's command tree. To make sure this doesn't
2108 free the tree we're executing out from under us, we need to
2109 take ownership of the tree ourselves. Since a given bpstat's
2110 commands are only executed once, we don't need to copy it; we
2111 can clear the pointer in the bpstat, and make sure we free
2112 the tree when we're done. */
2115 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2119 execute_control_command (cmd
);
2121 if (breakpoint_proceeded
)
2127 /* We can free this command tree now. */
2128 do_cleanups (this_cmd_tree_chain
);
2130 if (breakpoint_proceeded
)
2131 /* The inferior is proceeded by the command; bomb out now.
2132 The bpstat chain has been blown away by wait_for_inferior.
2133 But since execution has stopped again, there is a new bpstat
2134 to look at, so start over. */
2137 do_cleanups (old_chain
);
2140 /* This is the normal print function for a bpstat. In the future,
2141 much of this logic could (should?) be moved to bpstat_stop_status,
2142 by having it set different print_it values.
2144 Current scheme: When we stop, bpstat_print() is called. It loops
2145 through the bpstat list of things causing this stop, calling the
2146 print_bp_stop_message function on each one. The behavior of the
2147 print_bp_stop_message function depends on the print_it field of
2148 bpstat. If such field so indicates, call this function here.
2150 Return values from this routine (ultimately used by bpstat_print()
2151 and normal_stop() to decide what to do):
2152 PRINT_NOTHING: Means we already printed all we needed to print,
2153 don't print anything else.
2154 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2155 that something to be followed by a location.
2156 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2157 that something to be followed by a location.
2158 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2161 static enum print_stop_action
2162 print_it_typical (bpstat bs
)
2164 struct cleanup
*old_chain
, *ui_out_chain
;
2165 struct ui_stream
*stb
;
2166 stb
= ui_out_stream_new (uiout
);
2167 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2168 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2169 which has since been deleted. */
2170 if (bs
->breakpoint_at
== NULL
)
2171 return PRINT_UNKNOWN
;
2173 switch (bs
->breakpoint_at
->type
)
2176 case bp_hardware_breakpoint
:
2177 if (bs
->breakpoint_at
->loc
->address
!= bs
->breakpoint_at
->loc
->requested_address
)
2178 breakpoint_adjustment_warning (bs
->breakpoint_at
->loc
->requested_address
,
2179 bs
->breakpoint_at
->loc
->address
,
2180 bs
->breakpoint_at
->number
, 1);
2181 annotate_breakpoint (bs
->breakpoint_at
->number
);
2182 ui_out_text (uiout
, "\nBreakpoint ");
2183 if (ui_out_is_mi_like_p (uiout
))
2184 ui_out_field_string (uiout
, "reason",
2185 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
2186 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2187 ui_out_text (uiout
, ", ");
2188 return PRINT_SRC_AND_LOC
;
2191 case bp_shlib_event
:
2192 /* Did we stop because the user set the stop_on_solib_events
2193 variable? (If so, we report this as a generic, "Stopped due
2194 to shlib event" message.) */
2195 printf_filtered (_("Stopped due to shared library event\n"));
2196 return PRINT_NOTHING
;
2199 case bp_thread_event
:
2200 /* Not sure how we will get here.
2201 GDB should not stop for these breakpoints. */
2202 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
2203 return PRINT_NOTHING
;
2206 case bp_overlay_event
:
2207 /* By analogy with the thread event, GDB should not stop for these. */
2208 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
2209 return PRINT_NOTHING
;
2213 annotate_catchpoint (bs
->breakpoint_at
->number
);
2214 printf_filtered (_("\nCatchpoint %d (loaded %s), "),
2215 bs
->breakpoint_at
->number
,
2216 bs
->breakpoint_at
->triggered_dll_pathname
);
2217 return PRINT_SRC_AND_LOC
;
2220 case bp_catch_unload
:
2221 annotate_catchpoint (bs
->breakpoint_at
->number
);
2222 printf_filtered (_("\nCatchpoint %d (unloaded %s), "),
2223 bs
->breakpoint_at
->number
,
2224 bs
->breakpoint_at
->triggered_dll_pathname
);
2225 return PRINT_SRC_AND_LOC
;
2229 annotate_catchpoint (bs
->breakpoint_at
->number
);
2230 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
2231 bs
->breakpoint_at
->number
,
2232 bs
->breakpoint_at
->forked_inferior_pid
);
2233 return PRINT_SRC_AND_LOC
;
2236 case bp_catch_vfork
:
2237 annotate_catchpoint (bs
->breakpoint_at
->number
);
2238 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
2239 bs
->breakpoint_at
->number
,
2240 bs
->breakpoint_at
->forked_inferior_pid
);
2241 return PRINT_SRC_AND_LOC
;
2245 annotate_catchpoint (bs
->breakpoint_at
->number
);
2246 printf_filtered (_("\nCatchpoint %d (exec'd %s), "),
2247 bs
->breakpoint_at
->number
,
2248 bs
->breakpoint_at
->exec_pathname
);
2249 return PRINT_SRC_AND_LOC
;
2252 case bp_catch_catch
:
2253 if (current_exception_event
&&
2254 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2256 annotate_catchpoint (bs
->breakpoint_at
->number
);
2257 printf_filtered (_("\nCatchpoint %d (exception caught), "),
2258 bs
->breakpoint_at
->number
);
2259 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2260 printf_filtered (_("throw location %s:%d, "),
2261 CURRENT_EXCEPTION_THROW_FILE
,
2262 CURRENT_EXCEPTION_THROW_LINE
);
2264 printf_filtered (_("throw location unknown, "));
2266 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2267 printf_filtered (_("catch location %s:%d\n"),
2268 CURRENT_EXCEPTION_CATCH_FILE
,
2269 CURRENT_EXCEPTION_CATCH_LINE
);
2271 printf_filtered (_("catch location unknown\n"));
2273 /* don't bother to print location frame info */
2274 return PRINT_SRC_ONLY
;
2278 /* really throw, some other bpstat will handle it */
2279 return PRINT_UNKNOWN
;
2283 case bp_catch_throw
:
2284 if (current_exception_event
&&
2285 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2287 annotate_catchpoint (bs
->breakpoint_at
->number
);
2288 printf_filtered (_("\nCatchpoint %d (exception thrown), "),
2289 bs
->breakpoint_at
->number
);
2290 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2291 printf_filtered (_("throw location %s:%d, "),
2292 CURRENT_EXCEPTION_THROW_FILE
,
2293 CURRENT_EXCEPTION_THROW_LINE
);
2295 printf_filtered (_("throw location unknown, "));
2297 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2298 printf_filtered (_("catch location %s:%d\n"),
2299 CURRENT_EXCEPTION_CATCH_FILE
,
2300 CURRENT_EXCEPTION_CATCH_LINE
);
2302 printf_filtered (_("catch location unknown\n"));
2304 /* don't bother to print location frame info */
2305 return PRINT_SRC_ONLY
;
2309 /* really catch, some other bpstat will handle it */
2310 return PRINT_UNKNOWN
;
2315 case bp_hardware_watchpoint
:
2316 if (bs
->old_val
!= NULL
)
2318 annotate_watchpoint (bs
->breakpoint_at
->number
);
2319 if (ui_out_is_mi_like_p (uiout
))
2322 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
2323 mention (bs
->breakpoint_at
);
2324 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2325 ui_out_text (uiout
, "\nOld value = ");
2326 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2327 ui_out_field_stream (uiout
, "old", stb
);
2328 ui_out_text (uiout
, "\nNew value = ");
2329 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2330 ui_out_field_stream (uiout
, "new", stb
);
2331 do_cleanups (ui_out_chain
);
2332 ui_out_text (uiout
, "\n");
2333 value_free (bs
->old_val
);
2336 /* More than one watchpoint may have been triggered. */
2337 return PRINT_UNKNOWN
;
2340 case bp_read_watchpoint
:
2341 if (ui_out_is_mi_like_p (uiout
))
2344 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
2345 mention (bs
->breakpoint_at
);
2346 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2347 ui_out_text (uiout
, "\nValue = ");
2348 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2349 ui_out_field_stream (uiout
, "value", stb
);
2350 do_cleanups (ui_out_chain
);
2351 ui_out_text (uiout
, "\n");
2352 return PRINT_UNKNOWN
;
2355 case bp_access_watchpoint
:
2356 if (bs
->old_val
!= NULL
)
2358 annotate_watchpoint (bs
->breakpoint_at
->number
);
2359 if (ui_out_is_mi_like_p (uiout
))
2362 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2363 mention (bs
->breakpoint_at
);
2364 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2365 ui_out_text (uiout
, "\nOld value = ");
2366 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2367 ui_out_field_stream (uiout
, "old", stb
);
2368 value_free (bs
->old_val
);
2370 ui_out_text (uiout
, "\nNew value = ");
2374 mention (bs
->breakpoint_at
);
2375 if (ui_out_is_mi_like_p (uiout
))
2378 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2379 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2380 ui_out_text (uiout
, "\nValue = ");
2382 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2383 ui_out_field_stream (uiout
, "new", stb
);
2384 do_cleanups (ui_out_chain
);
2385 ui_out_text (uiout
, "\n");
2386 return PRINT_UNKNOWN
;
2389 /* Fall through, we don't deal with these types of breakpoints
2393 if (ui_out_is_mi_like_p (uiout
))
2396 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED
));
2397 return PRINT_UNKNOWN
;
2401 if (ui_out_is_mi_like_p (uiout
))
2404 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED
));
2405 return PRINT_UNKNOWN
;
2410 case bp_longjmp_resume
:
2411 case bp_step_resume
:
2412 case bp_through_sigtramp
:
2413 case bp_watchpoint_scope
:
2416 return PRINT_UNKNOWN
;
2420 /* Generic routine for printing messages indicating why we
2421 stopped. The behavior of this function depends on the value
2422 'print_it' in the bpstat structure. Under some circumstances we
2423 may decide not to print anything here and delegate the task to
2426 static enum print_stop_action
2427 print_bp_stop_message (bpstat bs
)
2429 switch (bs
->print_it
)
2432 /* Nothing should be printed for this bpstat entry. */
2433 return PRINT_UNKNOWN
;
2437 /* We still want to print the frame, but we already printed the
2438 relevant messages. */
2439 return PRINT_SRC_AND_LOC
;
2442 case print_it_normal
:
2443 /* Normal case. Call the breakpoint's print_it method, or
2444 print_it_typical. */
2445 if (bs
->breakpoint_at
!= NULL
&& bs
->breakpoint_at
->ops
!= NULL
2446 && bs
->breakpoint_at
->ops
->print_it
!= NULL
)
2447 return bs
->breakpoint_at
->ops
->print_it (bs
->breakpoint_at
);
2449 return print_it_typical (bs
);
2453 internal_error (__FILE__
, __LINE__
,
2454 _("print_bp_stop_message: unrecognized enum value"));
2459 /* Print a message indicating what happened. This is called from
2460 normal_stop(). The input to this routine is the head of the bpstat
2461 list - a list of the eventpoints that caused this stop. This
2462 routine calls the generic print routine for printing a message
2463 about reasons for stopping. This will print (for example) the
2464 "Breakpoint n," part of the output. The return value of this
2467 PRINT_UNKNOWN: Means we printed nothing
2468 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2469 code to print the location. An example is
2470 "Breakpoint 1, " which should be followed by
2472 PRINT_SRC_ONLY: Means we printed something, but there is no need
2473 to also print the location part of the message.
2474 An example is the catch/throw messages, which
2475 don't require a location appended to the end.
2476 PRINT_NOTHING: We have done some printing and we don't need any
2477 further info to be printed.*/
2479 enum print_stop_action
2480 bpstat_print (bpstat bs
)
2484 /* Maybe another breakpoint in the chain caused us to stop.
2485 (Currently all watchpoints go on the bpstat whether hit or not.
2486 That probably could (should) be changed, provided care is taken
2487 with respect to bpstat_explains_signal). */
2488 for (; bs
; bs
= bs
->next
)
2490 val
= print_bp_stop_message (bs
);
2491 if (val
== PRINT_SRC_ONLY
2492 || val
== PRINT_SRC_AND_LOC
2493 || val
== PRINT_NOTHING
)
2497 /* We reached the end of the chain, or we got a null BS to start
2498 with and nothing was printed. */
2499 return PRINT_UNKNOWN
;
2502 /* Evaluate the expression EXP and return 1 if value is zero.
2503 This is used inside a catch_errors to evaluate the breakpoint condition.
2504 The argument is a "struct expression *" that has been cast to char * to
2505 make it pass through catch_errors. */
2508 breakpoint_cond_eval (void *exp
)
2510 struct value
*mark
= value_mark ();
2511 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2512 value_free_to_mark (mark
);
2516 /* Allocate a new bpstat and chain it to the current one. */
2519 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2523 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2525 bs
->breakpoint_at
= b
;
2526 /* If the condition is false, etc., don't do the commands. */
2527 bs
->commands
= NULL
;
2529 bs
->print_it
= print_it_normal
;
2533 /* Possible return values for watchpoint_check (this can't be an enum
2534 because of check_errors). */
2535 /* The watchpoint has been deleted. */
2536 #define WP_DELETED 1
2537 /* The value has changed. */
2538 #define WP_VALUE_CHANGED 2
2539 /* The value has not changed. */
2540 #define WP_VALUE_NOT_CHANGED 3
2542 #define BP_TEMPFLAG 1
2543 #define BP_HARDWAREFLAG 2
2545 /* Check watchpoint condition. */
2548 watchpoint_check (void *p
)
2550 bpstat bs
= (bpstat
) p
;
2551 struct breakpoint
*b
;
2552 struct frame_info
*fr
;
2553 int within_current_scope
;
2555 b
= bs
->breakpoint_at
;
2557 if (b
->exp_valid_block
== NULL
)
2558 within_current_scope
= 1;
2561 /* There is no current frame at this moment. If we're going to have
2562 any chance of handling watchpoints on local variables, we'll need
2563 the frame chain (so we can determine if we're in scope). */
2564 reinit_frame_cache ();
2565 fr
= frame_find_by_id (b
->watchpoint_frame
);
2566 within_current_scope
= (fr
!= NULL
);
2568 /* If we've gotten confused in the unwinder, we might have
2569 returned a frame that can't describe this variable. */
2570 if (within_current_scope
2571 && block_function (b
->exp_valid_block
) != get_frame_function (fr
))
2572 within_current_scope
= 0;
2574 /* in_function_epilogue_p() returns a non-zero value if we're still
2575 in the function but the stack frame has already been invalidated.
2576 Since we can't rely on the values of local variables after the
2577 stack has been destroyed, we are treating the watchpoint in that
2578 state as `not changed' without further checking.
2580 vinschen/2003-09-04: The former implementation left out the case
2581 that the watchpoint frame couldn't be found by frame_find_by_id()
2582 because the current PC is currently in an epilogue. Calling
2583 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2584 if ((!within_current_scope
|| fr
== get_current_frame ())
2585 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2586 return WP_VALUE_NOT_CHANGED
;
2587 if (fr
&& within_current_scope
)
2588 /* If we end up stopping, the current frame will get selected
2589 in normal_stop. So this call to select_frame won't affect
2594 if (within_current_scope
)
2596 /* We use value_{,free_to_}mark because it could be a
2597 *long* time before we return to the command level and
2598 call free_all_values. We can't call free_all_values because
2599 we might be in the middle of evaluating a function call. */
2601 struct value
*mark
= value_mark ();
2602 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2603 if (!value_equal (b
->val
, new_val
))
2605 release_value (new_val
);
2606 value_free_to_mark (mark
);
2607 bs
->old_val
= b
->val
;
2609 /* We will stop here */
2610 return WP_VALUE_CHANGED
;
2614 /* Nothing changed, don't do anything. */
2615 value_free_to_mark (mark
);
2616 /* We won't stop here */
2617 return WP_VALUE_NOT_CHANGED
;
2622 /* This seems like the only logical thing to do because
2623 if we temporarily ignored the watchpoint, then when
2624 we reenter the block in which it is valid it contains
2625 garbage (in the case of a function, it may have two
2626 garbage values, one before and one after the prologue).
2627 So we can't even detect the first assignment to it and
2628 watch after that (since the garbage may or may not equal
2629 the first value assigned). */
2630 /* We print all the stop information in print_it_typical(), but
2631 in this case, by the time we call print_it_typical() this bp
2632 will be deleted already. So we have no choice but print the
2633 information here. */
2634 if (ui_out_is_mi_like_p (uiout
))
2636 (uiout
, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE
));
2637 ui_out_text (uiout
, "\nWatchpoint ");
2638 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2639 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2640 which its expression is valid.\n");
2642 if (b
->related_breakpoint
)
2643 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2644 b
->disposition
= disp_del_at_next_stop
;
2650 /* Get a bpstat associated with having just stopped at address
2651 BP_ADDR in thread PTID. STOPPED_BY_WATCHPOINT is 1 if the
2652 target thinks we stopped due to a hardware watchpoint, 0 if we
2653 know we did not trigger a hardware watchpoint, and -1 if we do not know. */
2655 /* Determine whether we stopped at a breakpoint, etc, or whether we
2656 don't understand this stop. Result is a chain of bpstat's such that:
2658 if we don't understand the stop, the result is a null pointer.
2660 if we understand why we stopped, the result is not null.
2662 Each element of the chain refers to a particular breakpoint or
2663 watchpoint at which we have stopped. (We may have stopped for
2664 several reasons concurrently.)
2666 Each element of the chain has valid next, breakpoint_at,
2667 commands, FIXME??? fields. */
2670 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
, int stopped_by_watchpoint
)
2672 struct breakpoint
*b
, *temp
;
2673 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2674 int real_breakpoint
= 0;
2675 /* Root of the chain of bpstat's */
2676 struct bpstats root_bs
[1];
2677 /* Pointer to the last thing in the chain currently. */
2678 bpstat bs
= root_bs
;
2679 int thread_id
= pid_to_thread_id (ptid
);
2681 ALL_BREAKPOINTS_SAFE (b
, temp
)
2683 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
2686 if (b
->type
!= bp_watchpoint
2687 && b
->type
!= bp_hardware_watchpoint
2688 && b
->type
!= bp_read_watchpoint
2689 && b
->type
!= bp_access_watchpoint
2690 && b
->type
!= bp_hardware_breakpoint
2691 && b
->type
!= bp_catch_fork
2692 && b
->type
!= bp_catch_vfork
2693 && b
->type
!= bp_catch_exec
2694 && b
->type
!= bp_catch_catch
2695 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2697 if (b
->loc
->address
!= bp_addr
) /* address doesn't match */
2699 if (overlay_debugging
/* unmapped overlay section */
2700 && section_is_overlay (b
->loc
->section
)
2701 && !section_is_mapped (b
->loc
->section
))
2705 /* Continuable hardware watchpoints are treated as non-existent if the
2706 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2707 some data address). Otherwise gdb won't stop on a break instruction
2708 in the code (not from a breakpoint) when a hardware watchpoint has
2711 if ((b
->type
== bp_hardware_watchpoint
2712 || b
->type
== bp_read_watchpoint
2713 || b
->type
== bp_access_watchpoint
)
2714 && !stopped_by_watchpoint
)
2717 if (b
->type
== bp_hardware_breakpoint
)
2719 if (b
->loc
->address
!= bp_addr
)
2721 if (overlay_debugging
/* unmapped overlay section */
2722 && section_is_overlay (b
->loc
->section
)
2723 && !section_is_mapped (b
->loc
->section
))
2727 /* Is this a catchpoint of a load or unload? If so, did we
2728 get a load or unload of the specified library? If not,
2730 if ((b
->type
== bp_catch_load
)
2731 #if defined(SOLIB_HAVE_LOAD_EVENT)
2732 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2733 || ((b
->dll_pathname
!= NULL
)
2734 && (strcmp (b
->dll_pathname
,
2735 SOLIB_LOADED_LIBRARY_PATHNAME (
2736 PIDGET (inferior_ptid
)))
2742 if ((b
->type
== bp_catch_unload
)
2743 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2744 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2745 || ((b
->dll_pathname
!= NULL
)
2746 && (strcmp (b
->dll_pathname
,
2747 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2748 PIDGET (inferior_ptid
)))
2754 if ((b
->type
== bp_catch_fork
)
2755 && !inferior_has_forked (PIDGET (inferior_ptid
),
2756 &b
->forked_inferior_pid
))
2759 if ((b
->type
== bp_catch_vfork
)
2760 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2761 &b
->forked_inferior_pid
))
2764 if ((b
->type
== bp_catch_exec
)
2765 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2768 if (ep_is_exception_catchpoint (b
) &&
2769 !(current_exception_event
= target_get_current_exception_event ()))
2772 /* Come here if it's a watchpoint, or if the break address matches */
2774 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2776 /* Watchpoints may change this, if not found to have triggered. */
2780 if (b
->type
== bp_watchpoint
||
2781 b
->type
== bp_hardware_watchpoint
)
2783 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2785 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2786 int e
= catch_errors (watchpoint_check
, bs
, message
,
2788 do_cleanups (cleanups
);
2792 /* We've already printed what needs to be printed. */
2793 /* Actually this is superfluous, because by the time we
2794 call print_it_typical() the wp will be already deleted,
2795 and the function will return immediately. */
2796 bs
->print_it
= print_it_done
;
2799 case WP_VALUE_CHANGED
:
2803 case WP_VALUE_NOT_CHANGED
:
2805 bs
->print_it
= print_it_noop
;
2812 /* Error from catch_errors. */
2813 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2814 if (b
->related_breakpoint
)
2815 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2816 b
->disposition
= disp_del_at_next_stop
;
2817 /* We've already printed what needs to be printed. */
2818 bs
->print_it
= print_it_done
;
2824 else if (b
->type
== bp_read_watchpoint
||
2825 b
->type
== bp_access_watchpoint
)
2831 if (!target_stopped_data_address (¤t_target
, &addr
))
2833 for (v
= b
->val_chain
; v
; v
= value_next (v
))
2835 if (VALUE_LVAL (v
) == lval_memory
2836 && ! value_lazy (v
))
2838 struct type
*vtype
= check_typedef (value_type (v
));
2840 if (v
== b
->val_chain
2841 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2842 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2846 vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
2847 /* Exact match not required. Within range is
2849 if (addr
>= vaddr
&&
2850 addr
< vaddr
+ TYPE_LENGTH (value_type (v
)))
2857 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2859 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2860 int e
= catch_errors (watchpoint_check
, bs
, message
,
2862 do_cleanups (cleanups
);
2866 /* We've already printed what needs to be printed. */
2867 bs
->print_it
= print_it_done
;
2870 case WP_VALUE_CHANGED
:
2871 if (b
->type
== bp_read_watchpoint
)
2873 /* Don't stop: read watchpoints shouldn't fire if
2874 the value has changed. This is for targets
2875 which cannot set read-only watchpoints. */
2876 bs
->print_it
= print_it_noop
;
2882 case WP_VALUE_NOT_CHANGED
:
2889 /* Error from catch_errors. */
2890 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2891 if (b
->related_breakpoint
)
2892 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2893 b
->disposition
= disp_del_at_next_stop
;
2894 /* We've already printed what needs to be printed. */
2895 bs
->print_it
= print_it_done
;
2899 else /* found == 0 */
2901 /* This is a case where some watchpoint(s) triggered,
2902 but not at the address of this watchpoint (FOUND
2903 was left zero). So don't print anything for this
2905 bs
->print_it
= print_it_noop
;
2912 /* By definition, an encountered breakpoint is a triggered
2916 real_breakpoint
= 1;
2919 if (frame_id_p (b
->frame_id
)
2920 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2924 int value_is_zero
= 0;
2928 /* Need to select the frame, with all that implies
2929 so that the conditions will have the right context. */
2930 select_frame (get_current_frame ());
2932 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2933 "Error in testing breakpoint condition:\n",
2935 /* FIXME-someday, should give breakpoint # */
2938 if (b
->cond
&& value_is_zero
)
2941 /* Don't consider this a hit. */
2944 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2947 /* Don't consider this a hit. */
2950 else if (b
->ignore_count
> 0)
2953 annotate_ignore_count_change ();
2958 /* We will stop here */
2959 if (b
->disposition
== disp_disable
)
2960 b
->enable_state
= bp_disabled
;
2963 bs
->commands
= b
->commands
;
2965 (strcmp ("silent", bs
->commands
->line
) == 0
2966 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
2968 bs
->commands
= bs
->commands
->next
;
2971 bs
->commands
= copy_command_lines (bs
->commands
);
2974 /* Print nothing for this entry if we dont stop or if we dont print. */
2975 if (bs
->stop
== 0 || bs
->print
== 0)
2976 bs
->print_it
= print_it_noop
;
2979 bs
->next
= NULL
; /* Terminate the chain */
2980 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2982 /* The value of a hardware watchpoint hasn't changed, but the
2983 intermediate memory locations we are watching may have. */
2984 if (bs
&& !bs
->stop
&&
2985 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2986 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2987 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2989 remove_breakpoints ();
2990 insert_breakpoints ();
2995 /* Tell what to do about this bpstat. */
2997 bpstat_what (bpstat bs
)
2999 /* Classify each bpstat as one of the following. */
3002 /* This bpstat element has no effect on the main_action. */
3005 /* There was a watchpoint, stop but don't print. */
3008 /* There was a watchpoint, stop and print. */
3011 /* There was a breakpoint but we're not stopping. */
3014 /* There was a breakpoint, stop but don't print. */
3017 /* There was a breakpoint, stop and print. */
3020 /* We hit the longjmp breakpoint. */
3023 /* We hit the longjmp_resume breakpoint. */
3026 /* We hit the step_resume breakpoint. */
3029 /* We hit the through_sigtramp breakpoint. */
3032 /* We hit the shared library event breakpoint. */
3035 /* We caught a shared library event. */
3038 /* This is just used to count how many enums there are. */
3042 /* Here is the table which drives this routine. So that we can
3043 format it pretty, we define some abbreviations for the
3044 enum bpstat_what codes. */
3045 #define kc BPSTAT_WHAT_KEEP_CHECKING
3046 #define ss BPSTAT_WHAT_STOP_SILENT
3047 #define sn BPSTAT_WHAT_STOP_NOISY
3048 #define sgl BPSTAT_WHAT_SINGLE
3049 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
3050 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
3051 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
3052 #define sr BPSTAT_WHAT_STEP_RESUME
3053 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
3054 #define shl BPSTAT_WHAT_CHECK_SHLIBS
3055 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
3057 /* "Can't happen." Might want to print an error message.
3058 abort() is not out of the question, but chances are GDB is just
3059 a bit confused, not unusable. */
3060 #define err BPSTAT_WHAT_STOP_NOISY
3062 /* Given an old action and a class, come up with a new action. */
3063 /* One interesting property of this table is that wp_silent is the same
3064 as bp_silent and wp_noisy is the same as bp_noisy. That is because
3065 after stopping, the check for whether to step over a breakpoint
3066 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
3067 reference to how we stopped. We retain separate wp_silent and
3068 bp_silent codes in case we want to change that someday.
3070 Another possibly interesting property of this table is that
3071 there's a partial ordering, priority-like, of the actions. Once
3072 you've decided that some action is appropriate, you'll never go
3073 back and decide something of a lower priority is better. The
3076 kc < clr sgl shl shlr slr sn sr ss ts
3077 sgl < clrs shl shlr slr sn sr ss ts
3078 slr < err shl shlr sn sr ss ts
3079 clr < clrs err shl shlr sn sr ss ts
3080 clrs < err shl shlr sn sr ss ts
3081 ss < shl shlr sn sr ts
3088 What I think this means is that we don't need a damned table
3089 here. If you just put the rows and columns in the right order,
3090 it'd look awfully regular. We could simply walk the bpstat list
3091 and choose the highest priority action we find, with a little
3092 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
3093 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
3094 is messy anyway). */
3096 /* step_resume entries: a step resume breakpoint overrides another
3097 breakpoint of signal handling (see comment in wait_for_inferior
3098 at where we set the step_resume breakpoint). */
3099 /* We handle the through_sigtramp_breakpoint the same way; having both
3100 one of those and a step_resume_breakpoint is probably very rare (?). */
3102 static const enum bpstat_what_main_action
3103 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3106 /* kc ss sn sgl slr clr clrs sr ts shl shlr
3109 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
3111 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3113 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3115 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
3117 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3119 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3121 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
3123 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
3125 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
3127 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
3129 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
3131 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
3146 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3147 struct bpstat_what retval
;
3149 retval
.call_dummy
= 0;
3150 for (; bs
!= NULL
; bs
= bs
->next
)
3152 enum class bs_class
= no_effect
;
3153 if (bs
->breakpoint_at
== NULL
)
3154 /* I suspect this can happen if it was a momentary breakpoint
3155 which has since been deleted. */
3157 switch (bs
->breakpoint_at
->type
)
3163 case bp_hardware_breakpoint
:
3169 bs_class
= bp_noisy
;
3171 bs_class
= bp_silent
;
3174 bs_class
= bp_nostop
;
3177 case bp_hardware_watchpoint
:
3178 case bp_read_watchpoint
:
3179 case bp_access_watchpoint
:
3183 bs_class
= wp_noisy
;
3185 bs_class
= wp_silent
;
3188 /* There was a watchpoint, but we're not stopping.
3189 This requires no further action. */
3190 bs_class
= no_effect
;
3193 bs_class
= long_jump
;
3195 case bp_longjmp_resume
:
3196 bs_class
= long_resume
;
3198 case bp_step_resume
:
3201 bs_class
= step_resume
;
3204 /* It is for the wrong frame. */
3205 bs_class
= bp_nostop
;
3207 case bp_through_sigtramp
:
3208 bs_class
= through_sig
;
3210 case bp_watchpoint_scope
:
3211 bs_class
= bp_nostop
;
3213 case bp_shlib_event
:
3214 bs_class
= shlib_event
;
3216 case bp_thread_event
:
3217 case bp_overlay_event
:
3218 bs_class
= bp_nostop
;
3221 case bp_catch_unload
:
3222 /* Only if this catchpoint triggered should we cause the
3223 step-out-of-dld behaviour. Otherwise, we ignore this
3226 bs_class
= catch_shlib_event
;
3228 bs_class
= no_effect
;
3231 case bp_catch_vfork
:
3236 bs_class
= bp_noisy
;
3238 bs_class
= bp_silent
;
3241 /* There was a catchpoint, but we're not stopping.
3242 This requires no further action. */
3243 bs_class
= no_effect
;
3245 case bp_catch_catch
:
3246 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3247 bs_class
= bp_nostop
;
3249 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3251 case bp_catch_throw
:
3252 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3253 bs_class
= bp_nostop
;
3255 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3258 /* Make sure the action is stop (silent or noisy),
3259 so infrun.c pops the dummy frame. */
3260 bs_class
= bp_silent
;
3261 retval
.call_dummy
= 1;
3264 current_action
= table
[(int) bs_class
][(int) current_action
];
3266 retval
.main_action
= current_action
;
3270 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3271 without hardware support). This isn't related to a specific bpstat,
3272 just to things like whether watchpoints are set. */
3275 bpstat_should_step (void)
3277 struct breakpoint
*b
;
3279 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3284 /* Nonzero if there are enabled hardware watchpoints. */
3286 bpstat_have_active_hw_watchpoints (void)
3288 struct bp_location
*bpt
;
3289 ALL_BP_LOCATIONS (bpt
)
3290 if (breakpoint_enabled (bpt
->owner
)
3292 && bpt
->loc_type
== bp_loc_hardware_watchpoint
)
3298 /* Given a bpstat that records zero or more triggered eventpoints, this
3299 function returns another bpstat which contains only the catchpoints
3300 on that first list, if any. */
3302 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3304 struct bpstats root_bs
[1];
3305 bpstat bs
= root_bs
;
3306 struct breakpoint
*ep
;
3309 bpstat_clear (cp_list
);
3310 root_bs
->next
= NULL
;
3312 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3314 /* Is this eventpoint a catchpoint? If not, ignore it. */
3315 ep
= ep_list
->breakpoint_at
;
3318 if ((ep
->type
!= bp_catch_load
) &&
3319 (ep
->type
!= bp_catch_unload
) &&
3320 (ep
->type
!= bp_catch_catch
) &&
3321 (ep
->type
!= bp_catch_throw
))
3322 /* pai: (temp) ADD fork/vfork here!! */
3325 /* Yes; add it to the list. */
3326 bs
= bpstat_alloc (ep
, bs
);
3331 #if defined(SOLIB_ADD)
3332 /* Also, for each triggered catchpoint, tag it with the name of
3333 the library that caused this trigger. (We copy the name now,
3334 because it's only guaranteed to be available NOW, when the
3335 catchpoint triggers. Clients who may wish to know the name
3336 later must get it from the catchpoint itself.) */
3337 if (ep
->triggered_dll_pathname
!= NULL
)
3338 xfree (ep
->triggered_dll_pathname
);
3339 if (ep
->type
== bp_catch_load
)
3340 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3341 PIDGET (inferior_ptid
));
3343 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3344 PIDGET (inferior_ptid
));
3346 dll_pathname
= NULL
;
3350 ep
->triggered_dll_pathname
= (char *)
3351 xmalloc (strlen (dll_pathname
) + 1);
3352 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3355 ep
->triggered_dll_pathname
= NULL
;
3361 /* Print B to gdb_stdout. */
3363 print_one_breakpoint (struct breakpoint
*b
,
3364 CORE_ADDR
*last_addr
)
3366 struct command_line
*l
;
3368 struct ep_type_description
3373 static struct ep_type_description bptypes
[] =
3375 {bp_none
, "?deleted?"},
3376 {bp_breakpoint
, "breakpoint"},
3377 {bp_hardware_breakpoint
, "hw breakpoint"},
3378 {bp_until
, "until"},
3379 {bp_finish
, "finish"},
3380 {bp_watchpoint
, "watchpoint"},
3381 {bp_hardware_watchpoint
, "hw watchpoint"},
3382 {bp_read_watchpoint
, "read watchpoint"},
3383 {bp_access_watchpoint
, "acc watchpoint"},
3384 {bp_longjmp
, "longjmp"},
3385 {bp_longjmp_resume
, "longjmp resume"},
3386 {bp_step_resume
, "step resume"},
3387 {bp_through_sigtramp
, "sigtramp"},
3388 {bp_watchpoint_scope
, "watchpoint scope"},
3389 {bp_call_dummy
, "call dummy"},
3390 {bp_shlib_event
, "shlib events"},
3391 {bp_thread_event
, "thread events"},
3392 {bp_overlay_event
, "overlay events"},
3393 {bp_catch_load
, "catch load"},
3394 {bp_catch_unload
, "catch unload"},
3395 {bp_catch_fork
, "catch fork"},
3396 {bp_catch_vfork
, "catch vfork"},
3397 {bp_catch_exec
, "catch exec"},
3398 {bp_catch_catch
, "catch catch"},
3399 {bp_catch_throw
, "catch throw"}
3402 static char *bpdisps
[] =
3403 {"del", "dstp", "dis", "keep"};
3404 static char bpenables
[] = "nynny";
3405 char wrap_indent
[80];
3406 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3407 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3408 struct cleanup
*bkpt_chain
;
3411 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3415 ui_out_field_int (uiout
, "number", b
->number
);
3419 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3420 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3421 internal_error (__FILE__
, __LINE__
,
3422 _("bptypes table does not describe type #%d."),
3424 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3428 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3432 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3433 ui_out_spaces (uiout
, 2);
3436 strcpy (wrap_indent
, " ");
3439 if (TARGET_ADDR_BIT
<= 32)
3440 strcat (wrap_indent
, " ");
3442 strcat (wrap_indent
, " ");
3445 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3446 b
->ops
->print_one (b
, last_addr
);
3451 internal_error (__FILE__
, __LINE__
,
3452 _("print_one_breakpoint: bp_none encountered\n"));
3456 case bp_hardware_watchpoint
:
3457 case bp_read_watchpoint
:
3458 case bp_access_watchpoint
:
3459 /* Field 4, the address, is omitted (which makes the columns
3460 not line up too nicely with the headers, but the effect
3461 is relatively readable). */
3463 ui_out_field_skip (uiout
, "addr");
3465 print_expression (b
->exp
, stb
->stream
);
3466 ui_out_field_stream (uiout
, "what", stb
);
3470 case bp_catch_unload
:
3471 /* Field 4, the address, is omitted (which makes the columns
3472 not line up too nicely with the headers, but the effect
3473 is relatively readable). */
3475 ui_out_field_skip (uiout
, "addr");
3477 if (b
->dll_pathname
== NULL
)
3479 ui_out_field_string (uiout
, "what", "<any library>");
3480 ui_out_spaces (uiout
, 1);
3484 ui_out_text (uiout
, "library \"");
3485 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3486 ui_out_text (uiout
, "\" ");
3491 case bp_catch_vfork
:
3492 /* Field 4, the address, is omitted (which makes the columns
3493 not line up too nicely with the headers, but the effect
3494 is relatively readable). */
3496 ui_out_field_skip (uiout
, "addr");
3498 if (b
->forked_inferior_pid
!= 0)
3500 ui_out_text (uiout
, "process ");
3501 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3502 ui_out_spaces (uiout
, 1);
3507 /* Field 4, the address, is omitted (which makes the columns
3508 not line up too nicely with the headers, but the effect
3509 is relatively readable). */
3511 ui_out_field_skip (uiout
, "addr");
3513 if (b
->exec_pathname
!= NULL
)
3515 ui_out_text (uiout
, "program \"");
3516 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3517 ui_out_text (uiout
, "\" ");
3521 case bp_catch_catch
:
3522 /* Field 4, the address, is omitted (which makes the columns
3523 not line up too nicely with the headers, but the effect
3524 is relatively readable). */
3526 ui_out_field_skip (uiout
, "addr");
3528 ui_out_field_string (uiout
, "what", "exception catch");
3529 ui_out_spaces (uiout
, 1);
3532 case bp_catch_throw
:
3533 /* Field 4, the address, is omitted (which makes the columns
3534 not line up too nicely with the headers, but the effect
3535 is relatively readable). */
3537 ui_out_field_skip (uiout
, "addr");
3539 ui_out_field_string (uiout
, "what", "exception throw");
3540 ui_out_spaces (uiout
, 1);
3544 case bp_hardware_breakpoint
:
3548 case bp_longjmp_resume
:
3549 case bp_step_resume
:
3550 case bp_through_sigtramp
:
3551 case bp_watchpoint_scope
:
3553 case bp_shlib_event
:
3554 case bp_thread_event
:
3555 case bp_overlay_event
:
3560 ui_out_field_string (uiout
, "addr", "<PENDING>");
3562 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
3565 *last_addr
= b
->loc
->address
;
3568 sym
= find_pc_sect_function (b
->loc
->address
, b
->loc
->section
);
3571 ui_out_text (uiout
, "in ");
3572 ui_out_field_string (uiout
, "func",
3573 SYMBOL_PRINT_NAME (sym
));
3574 ui_out_wrap_hint (uiout
, wrap_indent
);
3575 ui_out_text (uiout
, " at ");
3577 ui_out_field_string (uiout
, "file", b
->source_file
);
3578 ui_out_text (uiout
, ":");
3580 if (ui_out_is_mi_like_p (uiout
))
3582 struct symtab_and_line sal
= find_pc_line (b
->loc
->address
, 0);
3583 char *fullname
= symtab_to_fullname (sal
.symtab
);
3586 ui_out_field_string (uiout
, "fullname", fullname
);
3589 ui_out_field_int (uiout
, "line", b
->line_number
);
3591 else if (b
->pending
)
3593 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3597 print_address_symbolic (b
->loc
->address
, stb
->stream
, demangle
, "");
3598 ui_out_field_stream (uiout
, "at", stb
);
3603 if (b
->thread
!= -1)
3605 /* FIXME: This seems to be redundant and lost here; see the
3606 "stop only in" line a little further down. */
3607 ui_out_text (uiout
, " thread ");
3608 ui_out_field_int (uiout
, "thread", b
->thread
);
3611 ui_out_text (uiout
, "\n");
3613 if (frame_id_p (b
->frame_id
))
3616 ui_out_text (uiout
, "\tstop only in stack frame at ");
3617 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3619 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3620 ui_out_text (uiout
, "\n");
3626 ui_out_text (uiout
, "\tstop only if ");
3627 print_expression (b
->cond
, stb
->stream
);
3628 ui_out_field_stream (uiout
, "cond", stb
);
3629 ui_out_text (uiout
, "\n");
3632 if (b
->pending
&& b
->cond_string
)
3635 ui_out_text (uiout
, "\tstop only if ");
3636 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3637 ui_out_text (uiout
, "\n");
3640 if (b
->thread
!= -1)
3642 /* FIXME should make an annotation for this */
3643 ui_out_text (uiout
, "\tstop only in thread ");
3644 ui_out_field_int (uiout
, "thread", b
->thread
);
3645 ui_out_text (uiout
, "\n");
3648 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3650 /* FIXME should make an annotation for this */
3651 if (ep_is_catchpoint (b
))
3652 ui_out_text (uiout
, "\tcatchpoint");
3654 ui_out_text (uiout
, "\tbreakpoint");
3655 ui_out_text (uiout
, " already hit ");
3656 ui_out_field_int (uiout
, "times", b
->hit_count
);
3657 if (b
->hit_count
== 1)
3658 ui_out_text (uiout
, " time\n");
3660 ui_out_text (uiout
, " times\n");
3663 /* Output the count also if it is zero, but only if this is
3664 mi. FIXME: Should have a better test for this. */
3665 if (ui_out_is_mi_like_p (uiout
))
3666 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3667 ui_out_field_int (uiout
, "times", b
->hit_count
);
3669 if (b
->ignore_count
)
3672 ui_out_text (uiout
, "\tignore next ");
3673 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3674 ui_out_text (uiout
, " hits\n");
3677 if ((l
= b
->commands
))
3679 struct cleanup
*script_chain
;
3682 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3683 print_command_lines (uiout
, l
, 4);
3684 do_cleanups (script_chain
);
3686 do_cleanups (bkpt_chain
);
3687 do_cleanups (old_chain
);
3690 struct captured_breakpoint_query_args
3696 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3698 struct captured_breakpoint_query_args
*args
= data
;
3699 struct breakpoint
*b
;
3700 CORE_ADDR dummy_addr
= 0;
3703 if (args
->bnum
== b
->number
)
3705 print_one_breakpoint (b
, &dummy_addr
);
3713 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3715 struct captured_breakpoint_query_args args
;
3717 /* For the moment we don't trust print_one_breakpoint() to not throw
3719 return catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3720 error_message
, RETURN_MASK_ALL
);
3723 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3724 catchpoints, et.al.). */
3727 user_settable_breakpoint (const struct breakpoint
*b
)
3729 return (b
->type
== bp_breakpoint
3730 || b
->type
== bp_catch_load
3731 || b
->type
== bp_catch_unload
3732 || b
->type
== bp_catch_fork
3733 || b
->type
== bp_catch_vfork
3734 || b
->type
== bp_catch_exec
3735 || b
->type
== bp_catch_catch
3736 || b
->type
== bp_catch_throw
3737 || b
->type
== bp_hardware_breakpoint
3738 || b
->type
== bp_watchpoint
3739 || b
->type
== bp_read_watchpoint
3740 || b
->type
== bp_access_watchpoint
3741 || b
->type
== bp_hardware_watchpoint
);
3744 /* Print information on user settable breakpoint (watchpoint, etc)
3745 number BNUM. If BNUM is -1 print all user settable breakpoints.
3746 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3749 breakpoint_1 (int bnum
, int allflag
)
3751 struct breakpoint
*b
;
3752 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3753 int nr_printable_breakpoints
;
3754 struct cleanup
*bkpttbl_chain
;
3756 /* Compute the number of rows in the table. */
3757 nr_printable_breakpoints
= 0;
3760 || bnum
== b
->number
)
3762 if (allflag
|| user_settable_breakpoint (b
))
3763 nr_printable_breakpoints
++;
3768 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3772 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3775 if (nr_printable_breakpoints
> 0)
3776 annotate_breakpoints_headers ();
3777 if (nr_printable_breakpoints
> 0)
3779 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3780 if (nr_printable_breakpoints
> 0)
3782 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3783 if (nr_printable_breakpoints
> 0)
3785 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3786 if (nr_printable_breakpoints
> 0)
3788 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3791 if (nr_printable_breakpoints
> 0)
3793 if (TARGET_ADDR_BIT
<= 32)
3794 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3796 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3798 if (nr_printable_breakpoints
> 0)
3800 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3801 ui_out_table_body (uiout
);
3802 if (nr_printable_breakpoints
> 0)
3803 annotate_breakpoints_table ();
3807 || bnum
== b
->number
)
3809 /* We only print out user settable breakpoints unless the
3811 if (allflag
|| user_settable_breakpoint (b
))
3812 print_one_breakpoint (b
, &last_addr
);
3815 do_cleanups (bkpttbl_chain
);
3817 if (nr_printable_breakpoints
== 0)
3820 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3822 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3827 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3828 that a comparison of an unsigned with -1 is always false. */
3829 if (last_addr
!= (CORE_ADDR
) -1)
3830 set_next_address (last_addr
);
3833 /* FIXME? Should this be moved up so that it is only called when
3834 there have been breakpoints? */
3835 annotate_breakpoints_table_end ();
3839 breakpoints_info (char *bnum_exp
, int from_tty
)
3844 bnum
= parse_and_eval_long (bnum_exp
);
3846 breakpoint_1 (bnum
, 0);
3850 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3855 bnum
= parse_and_eval_long (bnum_exp
);
3857 breakpoint_1 (bnum
, 1);
3860 /* Print a message describing any breakpoints set at PC. */
3863 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
, int thread
)
3866 struct breakpoint
*b
;
3869 if (b
->loc
->address
== pc
) /* address match / overlay match */
3870 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3875 printf_filtered (_("Note: breakpoint "));
3876 else /* if (others == ???) */
3877 printf_filtered (_("Note: breakpoints "));
3879 if (b
->loc
->address
== pc
) /* address match / overlay match */
3880 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3883 printf_filtered ("%d", b
->number
);
3884 if (b
->thread
== -1 && thread
!= -1)
3885 printf_filtered (" (all threads)");
3886 else if (b
->thread
!= -1)
3887 printf_filtered (" (thread %d)", b
->thread
);
3888 printf_filtered ("%s%s ",
3889 ((b
->enable_state
== bp_disabled
||
3890 b
->enable_state
== bp_shlib_disabled
||
3891 b
->enable_state
== bp_call_disabled
)
3893 : b
->enable_state
== bp_permanent
3897 : ((others
== 1) ? " and" : ""));
3899 printf_filtered (_("also set at pc "));
3900 deprecated_print_address_numeric (pc
, 1, gdb_stdout
);
3901 printf_filtered (".\n");
3905 /* Set the default place to put a breakpoint
3906 for the `break' command with no arguments. */
3909 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3912 default_breakpoint_valid
= valid
;
3913 default_breakpoint_address
= addr
;
3914 default_breakpoint_symtab
= symtab
;
3915 default_breakpoint_line
= line
;
3918 /* Return true iff it is meaningful to use the address member of
3919 BPT. For some breakpoint types, the address member is irrelevant
3920 and it makes no sense to attempt to compare it to other addresses
3921 (or use it for any other purpose either).
3923 More specifically, each of the following breakpoint types will always
3924 have a zero valued address and we don't want check_duplicates() to mark
3925 breakpoints of any of these types to be a duplicate of an actual
3926 breakpoint at address zero:
3929 bp_hardware_watchpoint
3931 bp_access_watchpoint
3938 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3940 enum bptype type
= bpt
->type
;
3942 return (type
!= bp_watchpoint
3943 && type
!= bp_hardware_watchpoint
3944 && type
!= bp_read_watchpoint
3945 && type
!= bp_access_watchpoint
3946 && type
!= bp_catch_exec
3947 && type
!= bp_longjmp_resume
3948 && type
!= bp_catch_fork
3949 && type
!= bp_catch_vfork
);
3952 /* Rescan breakpoints at the same address and section as BPT,
3953 marking the first one as "first" and any others as "duplicates".
3954 This is so that the bpt instruction is only inserted once.
3955 If we have a permanent breakpoint at the same place as BPT, make
3956 that one the official one, and the rest as duplicates. */
3959 check_duplicates (struct breakpoint
*bpt
)
3961 struct bp_location
*b
;
3963 struct bp_location
*perm_bp
= 0;
3964 CORE_ADDR address
= bpt
->loc
->address
;
3965 asection
*section
= bpt
->loc
->section
;
3967 if (! breakpoint_address_is_meaningful (bpt
))
3970 ALL_BP_LOCATIONS (b
)
3971 if (b
->owner
->enable_state
!= bp_disabled
3972 && b
->owner
->enable_state
!= bp_shlib_disabled
3973 && !b
->owner
->pending
3974 && b
->owner
->enable_state
!= bp_call_disabled
3975 && b
->address
== address
/* address / overlay match */
3976 && (!overlay_debugging
|| b
->section
== section
)
3977 && breakpoint_address_is_meaningful (b
->owner
))
3979 /* Have we found a permanent breakpoint? */
3980 if (b
->owner
->enable_state
== bp_permanent
)
3987 b
->duplicate
= count
> 1;
3990 /* If we found a permanent breakpoint at this address, go over the
3991 list again and declare all the other breakpoints there to be the
3995 perm_bp
->duplicate
= 0;
3997 /* Permanent breakpoint should always be inserted. */
3998 if (! perm_bp
->inserted
)
3999 internal_error (__FILE__
, __LINE__
,
4000 _("allegedly permanent breakpoint is not "
4001 "actually inserted"));
4003 ALL_BP_LOCATIONS (b
)
4006 if (b
->owner
->enable_state
!= bp_disabled
4007 && b
->owner
->enable_state
!= bp_shlib_disabled
4008 && !b
->owner
->pending
4009 && b
->owner
->enable_state
!= bp_call_disabled
4010 && b
->address
== address
/* address / overlay match */
4011 && (!overlay_debugging
|| b
->section
== section
)
4012 && breakpoint_address_is_meaningful (b
->owner
))
4015 internal_error (__FILE__
, __LINE__
,
4016 _("another breakpoint was inserted on top of "
4017 "a permanent breakpoint"));
4026 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
4027 int bnum
, int have_bnum
)
4032 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
4033 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
4035 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4036 bnum
, astr1
, astr2
);
4038 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
4041 /* Adjust a breakpoint's address to account for architectural constraints
4042 on breakpoint placement. Return the adjusted address. Note: Very
4043 few targets require this kind of adjustment. For most targets,
4044 this function is simply the identity function. */
4047 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
4049 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
4051 /* Very few targets need any kind of breakpoint adjustment. */
4054 else if (bptype
== bp_watchpoint
4055 || bptype
== bp_hardware_watchpoint
4056 || bptype
== bp_read_watchpoint
4057 || bptype
== bp_access_watchpoint
4058 || bptype
== bp_catch_fork
4059 || bptype
== bp_catch_vfork
4060 || bptype
== bp_catch_exec
)
4062 /* Watchpoints and the various bp_catch_* eventpoints should not
4063 have their addresses modified. */
4068 CORE_ADDR adjusted_bpaddr
;
4070 /* Some targets have architectural constraints on the placement
4071 of breakpoint instructions. Obtain the adjusted address. */
4072 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
4075 /* An adjusted breakpoint address can significantly alter
4076 a user's expectations. Print a warning if an adjustment
4078 if (adjusted_bpaddr
!= bpaddr
)
4079 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
4081 return adjusted_bpaddr
;
4085 /* Allocate a struct bp_location. */
4087 static struct bp_location
*
4088 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
4090 struct bp_location
*loc
, *loc_p
;
4092 loc
= xmalloc (sizeof (struct bp_location
));
4093 memset (loc
, 0, sizeof (*loc
));
4103 case bp_longjmp_resume
:
4104 case bp_step_resume
:
4105 case bp_through_sigtramp
:
4106 case bp_watchpoint_scope
:
4108 case bp_shlib_event
:
4109 case bp_thread_event
:
4110 case bp_overlay_event
:
4112 case bp_catch_unload
:
4113 loc
->loc_type
= bp_loc_software_breakpoint
;
4115 case bp_hardware_breakpoint
:
4116 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4118 case bp_hardware_watchpoint
:
4119 case bp_read_watchpoint
:
4120 case bp_access_watchpoint
:
4121 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4125 case bp_catch_vfork
:
4127 case bp_catch_catch
:
4128 case bp_catch_throw
:
4129 loc
->loc_type
= bp_loc_other
;
4132 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
4135 /* Add this breakpoint to the end of the chain. */
4137 loc_p
= bp_location_chain
;
4139 bp_location_chain
= loc
;
4143 loc_p
= loc_p
->next
;
4150 /* set_raw_breakpoint() is a low level routine for allocating and
4151 partially initializing a breakpoint of type BPTYPE. The newly
4152 created breakpoint's address, section, source file name, and line
4153 number are provided by SAL. The newly created and partially
4154 initialized breakpoint is added to the breakpoint chain and
4155 is also returned as the value of this function.
4157 It is expected that the caller will complete the initialization of
4158 the newly created breakpoint struct as well as output any status
4159 information regarding the creation of a new breakpoint. In
4160 particular, set_raw_breakpoint() does NOT set the breakpoint
4161 number! Care should be taken to not allow an error() to occur
4162 prior to completing the initialization of the breakpoint. If this
4163 should happen, a bogus breakpoint will be left on the chain. */
4166 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4168 struct breakpoint
*b
, *b1
;
4170 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4171 memset (b
, 0, sizeof (*b
));
4172 b
->loc
= allocate_bp_location (b
, bptype
);
4173 b
->loc
->requested_address
= sal
.pc
;
4174 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
,
4176 if (sal
.symtab
== NULL
)
4177 b
->source_file
= NULL
;
4179 b
->source_file
= savestring (sal
.symtab
->filename
,
4180 strlen (sal
.symtab
->filename
));
4181 b
->loc
->section
= sal
.section
;
4183 b
->language
= current_language
->la_language
;
4184 b
->input_radix
= input_radix
;
4186 b
->line_number
= sal
.line
;
4187 b
->enable_state
= bp_enabled
;
4190 b
->ignore_count
= 0;
4192 b
->frame_id
= null_frame_id
;
4193 b
->dll_pathname
= NULL
;
4194 b
->triggered_dll_pathname
= NULL
;
4195 b
->forked_inferior_pid
= 0;
4196 b
->exec_pathname
= NULL
;
4200 /* Add this breakpoint to the end of the chain
4201 so that a list of breakpoints will come out in order
4202 of increasing numbers. */
4204 b1
= breakpoint_chain
;
4206 breakpoint_chain
= b
;
4214 check_duplicates (b
);
4215 breakpoints_changed ();
4221 /* Note that the breakpoint object B describes a permanent breakpoint
4222 instruction, hard-wired into the inferior's code. */
4224 make_breakpoint_permanent (struct breakpoint
*b
)
4226 b
->enable_state
= bp_permanent
;
4228 /* By definition, permanent breakpoints are already present in the code. */
4229 b
->loc
->inserted
= 1;
4232 static struct breakpoint
*
4233 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4235 static int internal_breakpoint_number
= -1;
4236 struct symtab_and_line sal
;
4237 struct breakpoint
*b
;
4239 init_sal (&sal
); /* initialize to zeroes */
4242 sal
.section
= find_pc_overlay (sal
.pc
);
4244 b
= set_raw_breakpoint (sal
, type
);
4245 b
->number
= internal_breakpoint_number
--;
4246 b
->disposition
= disp_donttouch
;
4253 create_longjmp_breakpoint (char *func_name
)
4255 struct breakpoint
*b
;
4256 struct minimal_symbol
*m
;
4258 if (func_name
== NULL
)
4259 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
4262 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4265 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4268 b
->enable_state
= bp_disabled
;
4271 b
->addr_string
= xstrdup (func_name
);
4274 /* Call this routine when stepping and nexting to enable a breakpoint
4275 if we do a longjmp(). When we hit that breakpoint, call
4276 set_longjmp_resume_breakpoint() to figure out where we are going. */
4279 enable_longjmp_breakpoint (void)
4281 struct breakpoint
*b
;
4284 if (b
->type
== bp_longjmp
)
4286 b
->enable_state
= bp_enabled
;
4287 check_duplicates (b
);
4292 disable_longjmp_breakpoint (void)
4294 struct breakpoint
*b
;
4297 if (b
->type
== bp_longjmp
4298 || b
->type
== bp_longjmp_resume
)
4300 b
->enable_state
= bp_disabled
;
4301 check_duplicates (b
);
4306 create_overlay_event_breakpoint (char *func_name
)
4308 struct breakpoint
*b
;
4309 struct minimal_symbol
*m
;
4311 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4314 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4316 b
->addr_string
= xstrdup (func_name
);
4318 if (overlay_debugging
== ovly_auto
)
4320 b
->enable_state
= bp_enabled
;
4321 overlay_events_enabled
= 1;
4325 b
->enable_state
= bp_disabled
;
4326 overlay_events_enabled
= 0;
4331 enable_overlay_breakpoints (void)
4333 struct breakpoint
*b
;
4336 if (b
->type
== bp_overlay_event
)
4338 b
->enable_state
= bp_enabled
;
4339 check_duplicates (b
);
4340 overlay_events_enabled
= 1;
4345 disable_overlay_breakpoints (void)
4347 struct breakpoint
*b
;
4350 if (b
->type
== bp_overlay_event
)
4352 b
->enable_state
= bp_disabled
;
4353 check_duplicates (b
);
4354 overlay_events_enabled
= 0;
4359 create_thread_event_breakpoint (CORE_ADDR address
)
4361 struct breakpoint
*b
;
4363 b
= create_internal_breakpoint (address
, bp_thread_event
);
4365 b
->enable_state
= bp_enabled
;
4366 /* addr_string has to be used or breakpoint_re_set will delete me. */
4367 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4373 remove_thread_event_breakpoints (void)
4375 struct breakpoint
*b
, *temp
;
4377 ALL_BREAKPOINTS_SAFE (b
, temp
)
4378 if (b
->type
== bp_thread_event
)
4379 delete_breakpoint (b
);
4382 struct captured_parse_breakpoint_args
4385 struct symtabs_and_lines
*sals_p
;
4386 char ***addr_string_p
;
4390 struct lang_and_radix
4396 /* Cleanup helper routine to restore the current language and
4399 do_restore_lang_radix_cleanup (void *old
)
4401 struct lang_and_radix
*p
= old
;
4402 set_language (p
->lang
);
4403 input_radix
= p
->radix
;
4406 /* Try and resolve a pending breakpoint. */
4408 resolve_pending_breakpoint (struct breakpoint
*b
)
4410 /* Try and reparse the breakpoint in case the shared library
4412 struct symtabs_and_lines sals
;
4413 struct symtab_and_line pending_sal
;
4414 char **cond_string
= (char **) NULL
;
4415 char *copy_arg
= b
->addr_string
;
4420 struct ui_file
*old_gdb_stderr
;
4421 struct lang_and_radix old_lr
;
4422 struct cleanup
*old_chain
;
4424 /* Set language, input-radix, then reissue breakpoint command.
4425 Ensure the language and input-radix are restored afterwards. */
4426 old_lr
.lang
= current_language
->la_language
;
4427 old_lr
.radix
= input_radix
;
4428 old_chain
= make_cleanup (do_restore_lang_radix_cleanup
, &old_lr
);
4430 set_language (b
->language
);
4431 input_radix
= b
->input_radix
;
4432 rc
= break_command_1 (b
->addr_string
, b
->flag
, b
->from_tty
, b
);
4434 if (rc
== GDB_RC_OK
)
4435 /* Pending breakpoint has been resolved. */
4436 printf_filtered (_("Pending breakpoint \"%s\" resolved\n"), b
->addr_string
);
4438 do_cleanups (old_chain
);
4443 remove_solib_event_breakpoints (void)
4445 struct breakpoint
*b
, *temp
;
4447 ALL_BREAKPOINTS_SAFE (b
, temp
)
4448 if (b
->type
== bp_shlib_event
)
4449 delete_breakpoint (b
);
4453 create_solib_event_breakpoint (CORE_ADDR address
)
4455 struct breakpoint
*b
;
4457 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4461 /* Disable any breakpoints that are on code in shared libraries. Only
4462 apply to enabled breakpoints, disabled ones can just stay disabled. */
4465 disable_breakpoints_in_shlibs (int silent
)
4467 struct breakpoint
*b
;
4468 int disabled_shlib_breaks
= 0;
4470 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4473 if (((b
->type
== bp_breakpoint
) || (b
->type
== bp_hardware_breakpoint
))
4474 && breakpoint_enabled (b
) && !b
->loc
->duplicate
4476 && PC_SOLIB (b
->loc
->address
)
4478 && solib_address (b
->loc
->address
)
4482 b
->enable_state
= bp_shlib_disabled
;
4485 if (!disabled_shlib_breaks
)
4487 target_terminal_ours_for_output ();
4488 warning (_("Temporarily disabling shared library breakpoints:"));
4490 disabled_shlib_breaks
= 1;
4491 warning (_("breakpoint #%d "), b
->number
);
4497 /* Disable any breakpoints that are in in an unloaded shared library. Only
4498 apply to enabled breakpoints, disabled ones can just stay disabled. */
4501 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4503 struct breakpoint
*b
;
4504 int disabled_shlib_breaks
= 0;
4506 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4509 if ((b
->loc
->loc_type
== bp_loc_hardware_breakpoint
4510 || b
->loc
->loc_type
== bp_loc_software_breakpoint
)
4511 && breakpoint_enabled (b
) && !b
->loc
->duplicate
)
4514 char *so_name
= PC_SOLIB (b
->loc
->address
);
4516 char *so_name
= solib_address (b
->loc
->address
);
4518 if (so_name
&& !strcmp (so_name
, solib
->so_name
))
4520 b
->enable_state
= bp_shlib_disabled
;
4521 /* At this point, we cannot rely on remove_breakpoint
4522 succeeding so we must mark the breakpoint as not inserted
4523 to prevent future errors occurring in remove_breakpoints. */
4524 b
->loc
->inserted
= 0;
4525 if (!disabled_shlib_breaks
)
4527 target_terminal_ours_for_output ();
4528 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4531 disabled_shlib_breaks
= 1;
4537 /* Try to reenable any breakpoints in shared libraries. */
4539 re_enable_breakpoints_in_shlibs (void)
4541 struct breakpoint
*b
, *tmp
;
4543 ALL_BREAKPOINTS_SAFE (b
, tmp
)
4545 if (b
->enable_state
== bp_shlib_disabled
)
4550 /* Do not reenable the breakpoint if the shared library is
4551 still not mapped in. */
4553 lib
= PC_SOLIB (b
->loc
->address
);
4555 lib
= solib_address (b
->loc
->address
);
4557 if (lib
!= NULL
&& target_read_memory (b
->loc
->address
, buf
, 1) == 0)
4558 b
->enable_state
= bp_enabled
;
4560 else if (b
->pending
&& (b
->enable_state
== bp_enabled
))
4562 if (resolve_pending_breakpoint (b
) == GDB_RC_OK
)
4563 delete_breakpoint (b
);
4569 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4570 char *cond_string
, enum bptype bp_kind
)
4572 struct breakpoint
*b
;
4573 struct symtabs_and_lines sals
;
4574 struct cleanup
*old_chain
;
4575 struct cleanup
*canonical_strings_chain
= NULL
;
4576 char *addr_start
= hookname
;
4577 char *addr_end
= NULL
;
4578 char **canonical
= (char **) NULL
;
4579 int thread
= -1; /* All threads. */
4581 /* Set a breakpoint on the specified hook. */
4582 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
,
4583 0, &canonical
, NULL
);
4584 addr_end
= hookname
;
4586 if (sals
.nelts
== 0)
4588 warning (_("Unable to set a breakpoint on dynamic linker callback.\n"
4589 "Suggest linking with /opt/langtools/lib/end.o.\n"
4590 "GDB will be unable to track shl_load/shl_unload calls."));
4593 if (sals
.nelts
!= 1)
4595 warning (_("Unable to set unique breakpoint on dynamic linker callback.\n"
4596 "GDB will be unable to track shl_load/shl_unload calls."));
4600 /* Make sure that all storage allocated in decode_line_1 gets freed
4601 in case the following errors out. */
4602 old_chain
= make_cleanup (xfree
, sals
.sals
);
4603 if (canonical
!= (char **) NULL
)
4605 make_cleanup (xfree
, canonical
);
4606 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4607 if (canonical
[0] != NULL
)
4608 make_cleanup (xfree
, canonical
[0]);
4611 resolve_sal_pc (&sals
.sals
[0]);
4613 /* Remove the canonical strings from the cleanup, they are needed below. */
4614 if (canonical
!= (char **) NULL
)
4615 discard_cleanups (canonical_strings_chain
);
4617 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4618 set_breakpoint_count (breakpoint_count
+ 1);
4619 b
->number
= breakpoint_count
;
4621 b
->cond_string
= (cond_string
== NULL
) ?
4622 NULL
: savestring (cond_string
, strlen (cond_string
));
4625 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4626 b
->addr_string
= canonical
[0];
4627 else if (addr_start
)
4628 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4630 b
->enable_state
= bp_enabled
;
4631 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4633 if (dll_pathname
== NULL
)
4634 b
->dll_pathname
= NULL
;
4637 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4638 strcpy (b
->dll_pathname
, dll_pathname
);
4642 do_cleanups (old_chain
);
4646 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4647 char *dll_pathname
, char *cond_string
)
4649 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4650 cond_string
, bp_catch_load
);
4654 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4655 char *dll_pathname
, char *cond_string
)
4657 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4658 cond_string
, bp_catch_unload
);
4662 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4663 enum bptype bp_kind
)
4665 struct symtab_and_line sal
;
4666 struct breakpoint
*b
;
4667 int thread
= -1; /* All threads. */
4674 b
= set_raw_breakpoint (sal
, bp_kind
);
4675 set_breakpoint_count (breakpoint_count
+ 1);
4676 b
->number
= breakpoint_count
;
4678 b
->cond_string
= (cond_string
== NULL
) ?
4679 NULL
: savestring (cond_string
, strlen (cond_string
));
4681 b
->addr_string
= NULL
;
4682 b
->enable_state
= bp_enabled
;
4683 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4684 b
->forked_inferior_pid
= 0;
4690 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4692 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4696 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4698 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4702 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4704 struct symtab_and_line sal
;
4705 struct breakpoint
*b
;
4706 int thread
= -1; /* All threads. */
4713 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4714 set_breakpoint_count (breakpoint_count
+ 1);
4715 b
->number
= breakpoint_count
;
4717 b
->cond_string
= (cond_string
== NULL
) ?
4718 NULL
: savestring (cond_string
, strlen (cond_string
));
4720 b
->addr_string
= NULL
;
4721 b
->enable_state
= bp_enabled
;
4722 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4728 hw_breakpoint_used_count (void)
4730 struct breakpoint
*b
;
4735 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4743 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4745 struct breakpoint
*b
;
4748 *other_type_used
= 0;
4751 if (breakpoint_enabled (b
))
4753 if (b
->type
== type
)
4755 else if ((b
->type
== bp_hardware_watchpoint
||
4756 b
->type
== bp_read_watchpoint
||
4757 b
->type
== bp_access_watchpoint
))
4758 *other_type_used
= 1;
4764 /* Call this after hitting the longjmp() breakpoint. Use this to set
4765 a new breakpoint at the target of the jmp_buf.
4767 FIXME - This ought to be done by setting a temporary breakpoint
4768 that gets deleted automatically... */
4771 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4773 struct breakpoint
*b
;
4776 if (b
->type
== bp_longjmp_resume
)
4778 b
->loc
->requested_address
= pc
;
4779 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
,
4781 b
->enable_state
= bp_enabled
;
4782 b
->frame_id
= frame_id
;
4783 check_duplicates (b
);
4789 disable_watchpoints_before_interactive_call_start (void)
4791 struct breakpoint
*b
;
4795 if (((b
->type
== bp_watchpoint
)
4796 || (b
->type
== bp_hardware_watchpoint
)
4797 || (b
->type
== bp_read_watchpoint
)
4798 || (b
->type
== bp_access_watchpoint
)
4799 || ep_is_exception_catchpoint (b
))
4800 && breakpoint_enabled (b
))
4802 b
->enable_state
= bp_call_disabled
;
4803 check_duplicates (b
);
4809 enable_watchpoints_after_interactive_call_stop (void)
4811 struct breakpoint
*b
;
4815 if (((b
->type
== bp_watchpoint
)
4816 || (b
->type
== bp_hardware_watchpoint
)
4817 || (b
->type
== bp_read_watchpoint
)
4818 || (b
->type
== bp_access_watchpoint
)
4819 || ep_is_exception_catchpoint (b
))
4820 && (b
->enable_state
== bp_call_disabled
))
4822 b
->enable_state
= bp_enabled
;
4823 check_duplicates (b
);
4829 /* Set a breakpoint that will evaporate an end of command
4830 at address specified by SAL.
4831 Restrict it to frame FRAME if FRAME is nonzero. */
4834 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4837 struct breakpoint
*b
;
4838 b
= set_raw_breakpoint (sal
, type
);
4839 b
->enable_state
= bp_enabled
;
4840 b
->disposition
= disp_donttouch
;
4841 b
->frame_id
= frame_id
;
4843 /* If we're debugging a multi-threaded program, then we
4844 want momentary breakpoints to be active in only a
4845 single thread of control. */
4846 if (in_thread_list (inferior_ptid
))
4847 b
->thread
= pid_to_thread_id (inferior_ptid
);
4853 /* Tell the user we have just set a breakpoint B. */
4856 mention (struct breakpoint
*b
)
4859 struct cleanup
*old_chain
, *ui_out_chain
;
4860 struct ui_stream
*stb
;
4862 stb
= ui_out_stream_new (uiout
);
4863 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4865 /* FIXME: This is misplaced; mention() is called by things (like
4866 hitting a watchpoint) other than breakpoint creation. It should
4867 be possible to clean this up and at the same time replace the
4868 random calls to breakpoint_changed with this hook, as has already
4869 been done for deprecated_delete_breakpoint_hook and so on. */
4870 if (deprecated_create_breakpoint_hook
)
4871 deprecated_create_breakpoint_hook (b
);
4872 breakpoint_create_event (b
->number
);
4874 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4875 b
->ops
->print_mention (b
);
4880 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b
->number
);
4883 ui_out_text (uiout
, "Watchpoint ");
4884 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4885 ui_out_field_int (uiout
, "number", b
->number
);
4886 ui_out_text (uiout
, ": ");
4887 print_expression (b
->exp
, stb
->stream
);
4888 ui_out_field_stream (uiout
, "exp", stb
);
4889 do_cleanups (ui_out_chain
);
4891 case bp_hardware_watchpoint
:
4892 ui_out_text (uiout
, "Hardware watchpoint ");
4893 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4894 ui_out_field_int (uiout
, "number", b
->number
);
4895 ui_out_text (uiout
, ": ");
4896 print_expression (b
->exp
, stb
->stream
);
4897 ui_out_field_stream (uiout
, "exp", stb
);
4898 do_cleanups (ui_out_chain
);
4900 case bp_read_watchpoint
:
4901 ui_out_text (uiout
, "Hardware read watchpoint ");
4902 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4903 ui_out_field_int (uiout
, "number", b
->number
);
4904 ui_out_text (uiout
, ": ");
4905 print_expression (b
->exp
, stb
->stream
);
4906 ui_out_field_stream (uiout
, "exp", stb
);
4907 do_cleanups (ui_out_chain
);
4909 case bp_access_watchpoint
:
4910 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4911 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4912 ui_out_field_int (uiout
, "number", b
->number
);
4913 ui_out_text (uiout
, ": ");
4914 print_expression (b
->exp
, stb
->stream
);
4915 ui_out_field_stream (uiout
, "exp", stb
);
4916 do_cleanups (ui_out_chain
);
4919 if (ui_out_is_mi_like_p (uiout
))
4924 printf_filtered (_("Breakpoint %d"), b
->number
);
4927 case bp_hardware_breakpoint
:
4928 if (ui_out_is_mi_like_p (uiout
))
4933 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
4937 case bp_catch_unload
:
4938 printf_filtered (_("Catchpoint %d (%s %s)"),
4940 (b
->type
== bp_catch_load
) ? "load" : "unload",
4941 (b
->dll_pathname
!= NULL
) ?
4942 b
->dll_pathname
: "<any library>");
4945 case bp_catch_vfork
:
4946 printf_filtered (_("Catchpoint %d (%s)"),
4948 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4951 printf_filtered (_("Catchpoint %d (exec)"),
4954 case bp_catch_catch
:
4955 case bp_catch_throw
:
4956 printf_filtered (_("Catchpoint %d (%s)"),
4958 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4964 case bp_longjmp_resume
:
4965 case bp_step_resume
:
4966 case bp_through_sigtramp
:
4968 case bp_watchpoint_scope
:
4969 case bp_shlib_event
:
4970 case bp_thread_event
:
4971 case bp_overlay_event
:
4977 /* i18n: cagney/2005-02-11: Below needs to be merged into a
4981 printf_filtered (_(" (%s) pending."), b
->addr_string
);
4985 if (addressprint
|| b
->source_file
== NULL
)
4987 printf_filtered (" at ");
4988 deprecated_print_address_numeric (b
->loc
->address
, 1, gdb_stdout
);
4991 printf_filtered (": file %s, line %d.",
4992 b
->source_file
, b
->line_number
);
4995 do_cleanups (old_chain
);
4996 if (ui_out_is_mi_like_p (uiout
))
4998 printf_filtered ("\n");
5002 /* Add SALS.nelts breakpoints to the breakpoint table. For each
5003 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
5004 COND[i] and COND_STRING[i] values.
5006 The parameter PENDING_BP points to a pending breakpoint that is
5007 the basis of the breakpoints currently being created. The pending
5008 breakpoint may contain a separate condition string or commands
5009 that were added after the initial pending breakpoint was created.
5011 NOTE: If the function succeeds, the caller is expected to cleanup
5012 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
5013 array contents). If the function fails (error() is called), the
5014 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
5015 COND and SALS arrays and each of those arrays contents. */
5018 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
5019 struct expression
**cond
, char **cond_string
,
5020 enum bptype type
, enum bpdisp disposition
,
5021 int thread
, int ignore_count
, int from_tty
,
5022 struct breakpoint
*pending_bp
)
5024 if (type
== bp_hardware_breakpoint
)
5026 int i
= hw_breakpoint_used_count ();
5027 int target_resources_ok
=
5028 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
5030 if (target_resources_ok
== 0)
5031 error (_("No hardware breakpoint support in the target."));
5032 else if (target_resources_ok
< 0)
5033 error (_("Hardware breakpoints used exceeds limit."));
5036 /* Now set all the breakpoints. */
5039 for (i
= 0; i
< sals
.nelts
; i
++)
5041 struct breakpoint
*b
;
5042 struct symtab_and_line sal
= sals
.sals
[i
];
5045 describe_other_breakpoints (sal
.pc
, sal
.section
, thread
);
5047 b
= set_raw_breakpoint (sal
, type
);
5048 set_breakpoint_count (breakpoint_count
+ 1);
5049 b
->number
= breakpoint_count
;
5053 b
->addr_string
= addr_string
[i
];
5055 /* addr_string has to be used or breakpoint_re_set will delete
5057 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
5058 b
->cond_string
= cond_string
[i
];
5059 b
->ignore_count
= ignore_count
;
5060 b
->enable_state
= bp_enabled
;
5061 b
->disposition
= disposition
;
5062 /* If resolving a pending breakpoint, a check must be made to see if
5063 the user has specified a new condition or commands for the
5064 breakpoint. A new condition will override any condition that was
5065 initially specified with the initial breakpoint command. */
5069 if (pending_bp
->cond_string
)
5071 arg
= pending_bp
->cond_string
;
5072 b
->cond_string
= savestring (arg
, strlen (arg
));
5073 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
5075 error (_("Junk at end of pending breakpoint condition expression"));
5077 /* If there are commands associated with the breakpoint, they should
5079 if (pending_bp
->commands
)
5080 b
->commands
= copy_command_lines (pending_bp
->commands
);
5082 /* We have to copy over the ignore_count and thread as well. */
5083 b
->ignore_count
= pending_bp
->ignore_count
;
5084 b
->thread
= pending_bp
->thread
;
5091 /* Parse ARG which is assumed to be a SAL specification possibly
5092 followed by conditionals. On return, SALS contains an array of SAL
5093 addresses found. ADDR_STRING contains a vector of (canonical)
5094 address strings. ARG points to the end of the SAL. */
5097 parse_breakpoint_sals (char **address
,
5098 struct symtabs_and_lines
*sals
,
5099 char ***addr_string
,
5102 char *addr_start
= *address
;
5103 *addr_string
= NULL
;
5104 /* If no arg given, or if first arg is 'if ', use the default
5106 if ((*address
) == NULL
5107 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
5109 if (default_breakpoint_valid
)
5111 struct symtab_and_line sal
;
5112 init_sal (&sal
); /* initialize to zeroes */
5113 sals
->sals
= (struct symtab_and_line
*)
5114 xmalloc (sizeof (struct symtab_and_line
));
5115 sal
.pc
= default_breakpoint_address
;
5116 sal
.line
= default_breakpoint_line
;
5117 sal
.symtab
= default_breakpoint_symtab
;
5118 sal
.section
= find_pc_overlay (sal
.pc
);
5119 sals
->sals
[0] = sal
;
5123 error (_("No default breakpoint address now."));
5127 /* Force almost all breakpoints to be in terms of the
5128 current_source_symtab (which is decode_line_1's default). This
5129 should produce the results we want almost all of the time while
5130 leaving default_breakpoint_* alone.
5131 ObjC: However, don't match an Objective-C method name which
5132 may have a '+' or '-' succeeded by a '[' */
5134 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5136 if (default_breakpoint_valid
5138 || ((strchr ("+-", (*address
)[0]) != NULL
)
5139 && ((*address
)[1] != '['))))
5140 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5141 default_breakpoint_line
, addr_string
,
5144 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5145 addr_string
, not_found_ptr
);
5147 /* For any SAL that didn't have a canonical string, fill one in. */
5148 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5149 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5150 if (addr_start
!= (*address
))
5153 for (i
= 0; i
< sals
->nelts
; i
++)
5155 /* Add the string if not present. */
5156 if ((*addr_string
)[i
] == NULL
)
5157 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5163 /* Convert each SAL into a real PC. Verify that the PC can be
5164 inserted as a breakpoint. If it can't throw an error. */
5167 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5171 for (i
= 0; i
< sals
->nelts
; i
++)
5173 resolve_sal_pc (&sals
->sals
[i
]);
5175 /* It's possible for the PC to be nonzero, but still an illegal
5176 value on some targets.
5178 For example, on HP-UX if you start gdb, and before running the
5179 inferior you try to set a breakpoint on a shared library function
5180 "foo" where the inferior doesn't call "foo" directly but does
5181 pass its address to another function call, then we do find a
5182 minimal symbol for the "foo", but it's address is invalid.
5183 (Appears to be an index into a table that the loader sets up
5184 when the inferior is run.)
5186 Give the target a chance to bless sals.sals[i].pc before we
5187 try to make a breakpoint for it. */
5188 #ifdef DEPRECATED_PC_REQUIRES_RUN_BEFORE_USE
5189 if (DEPRECATED_PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
5191 if (address
== NULL
)
5192 error (_("Cannot break without a running program."));
5194 error (_("Cannot break on %s without a running program."),
5202 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5204 struct captured_parse_breakpoint_args
*args
= data
;
5206 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5207 args
->not_found_ptr
);
5210 /* Set a breakpoint according to ARG (function, linenum or *address)
5211 flag: first bit : 0 non-temporary, 1 temporary.
5212 second bit : 0 normal breakpoint, 1 hardware breakpoint.
5214 PENDING_BP is non-NULL when this function is being called to resolve
5215 a pending breakpoint. */
5218 break_command_1 (char *arg
, int flag
, int from_tty
, struct breakpoint
*pending_bp
)
5220 struct gdb_exception e
;
5221 int tempflag
, hardwareflag
;
5222 struct symtabs_and_lines sals
;
5223 struct expression
**cond
= 0;
5224 struct symtab_and_line pending_sal
;
5225 char **cond_string
= (char **) NULL
;
5228 char *addr_start
= arg
;
5230 struct cleanup
*old_chain
;
5231 struct cleanup
*breakpoint_chain
= NULL
;
5232 struct captured_parse_breakpoint_args parse_args
;
5236 int ignore_count
= 0;
5239 hardwareflag
= flag
& BP_HARDWAREFLAG
;
5240 tempflag
= flag
& BP_TEMPFLAG
;
5246 parse_args
.arg_p
= &arg
;
5247 parse_args
.sals_p
= &sals
;
5248 parse_args
.addr_string_p
= &addr_string
;
5249 parse_args
.not_found_ptr
= ¬_found
;
5251 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5252 &parse_args
, RETURN_MASK_ALL
);
5254 /* If caller is interested in rc value from parse, set value. */
5258 exception_print (gdb_stderr
, e
);
5263 case NOT_FOUND_ERROR
:
5264 /* If called to resolve pending breakpoint, just return
5269 exception_print (gdb_stderr
, e
);
5271 /* If pending breakpoint support is turned off, throw
5274 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5275 deprecated_throw_reason (RETURN_ERROR
);
5277 /* If pending breakpoint support is auto query and the user
5278 selects no, then simply return the error code. */
5279 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5280 !nquery ("Make breakpoint pending on future shared library load? "))
5283 /* At this point, either the user was queried about setting
5284 a pending breakpoint and selected yes, or pending
5285 breakpoint behavior is on and thus a pending breakpoint
5286 is defaulted on behalf of the user. */
5287 copy_arg
= xstrdup (addr_start
);
5288 addr_string
= ©_arg
;
5290 sals
.sals
= &pending_sal
;
5295 exception_print (gdb_stderr
, e
);
5303 /* Create a chain of things that always need to be cleaned up. */
5304 old_chain
= make_cleanup (null_cleanup
, 0);
5308 /* Make sure that all storage allocated to SALS gets freed. */
5309 make_cleanup (xfree
, sals
.sals
);
5311 /* Cleanup the addr_string array but not its contents. */
5312 make_cleanup (xfree
, addr_string
);
5315 /* Allocate space for all the cond expressions. */
5316 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5317 make_cleanup (xfree
, cond
);
5319 /* Allocate space for all the cond strings. */
5320 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5321 make_cleanup (xfree
, cond_string
);
5323 /* ----------------------------- SNIP -----------------------------
5324 Anything added to the cleanup chain beyond this point is assumed
5325 to be part of a breakpoint. If the breakpoint create succeeds
5326 then the memory is not reclaimed. */
5327 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5329 /* Mark the contents of the addr_string for cleanup. These go on
5330 the breakpoint_chain and only occure if the breakpoint create
5332 for (i
= 0; i
< sals
.nelts
; i
++)
5334 if (addr_string
[i
] != NULL
)
5335 make_cleanup (xfree
, addr_string
[i
]);
5338 /* Resolve all line numbers to PC's and verify that the addresses
5339 are ok for the target. */
5341 breakpoint_sals_to_pc (&sals
, addr_start
);
5343 /* Verify that condition can be parsed, before setting any
5344 breakpoints. Allocate a separate condition expression for each
5346 thread
= -1; /* No specific thread yet */
5349 for (i
= 0; i
< sals
.nelts
; i
++)
5356 char *cond_start
= NULL
;
5357 char *cond_end
= NULL
;
5358 while (*tok
== ' ' || *tok
== '\t')
5363 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5366 toklen
= end_tok
- tok
;
5368 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5370 tok
= cond_start
= end_tok
+ 1;
5371 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
),
5373 make_cleanup (xfree
, cond
[i
]);
5375 cond_string
[i
] = savestring (cond_start
,
5376 cond_end
- cond_start
);
5377 make_cleanup (xfree
, cond_string
[i
]);
5379 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5385 thread
= strtol (tok
, &tok
, 0);
5387 error (_("Junk after thread keyword."));
5388 if (!valid_thread_id (thread
))
5389 error (_("Unknown thread %d."), thread
);
5392 error (_("Junk at end of arguments."));
5395 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5396 hardwareflag
? bp_hardware_breakpoint
5398 tempflag
? disp_del
: disp_donttouch
,
5399 thread
, ignore_count
, from_tty
,
5404 struct symtab_and_line sal
;
5405 struct breakpoint
*b
;
5410 make_cleanup (xfree
, copy_arg
);
5412 b
= set_raw_breakpoint (sal
, hardwareflag
? bp_hardware_breakpoint
5414 set_breakpoint_count (breakpoint_count
+ 1);
5415 b
->number
= breakpoint_count
;
5418 b
->addr_string
= *addr_string
;
5419 b
->cond_string
= *cond_string
;
5420 b
->ignore_count
= ignore_count
;
5422 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5423 b
->from_tty
= from_tty
;
5429 warning (_("Multiple breakpoints were set.\n"
5430 "Use the \"delete\" command to delete unwanted breakpoints."));
5431 /* That's it. Discard the cleanups for data inserted into the
5433 discard_cleanups (breakpoint_chain
);
5434 /* But cleanup everything else. */
5435 do_cleanups (old_chain
);
5440 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
5441 linenum or *address) with COND and IGNORE_COUNT. */
5443 struct captured_breakpoint_args
5454 do_captured_breakpoint (struct ui_out
*uiout
, void *data
)
5456 struct captured_breakpoint_args
*args
= data
;
5457 struct symtabs_and_lines sals
;
5458 struct expression
**cond
;
5459 struct cleanup
*old_chain
;
5460 struct cleanup
*breakpoint_chain
= NULL
;
5467 /* Parse the source and lines spec. Delay check that the expression
5468 didn't contain trailing garbage until after cleanups are in
5472 address_end
= args
->address
;
5474 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
, 0);
5479 /* Create a chain of things at always need to be cleaned up. */
5480 old_chain
= make_cleanup (null_cleanup
, 0);
5482 /* Always have a addr_string array, even if it is empty. */
5483 make_cleanup (xfree
, addr_string
);
5485 /* Make sure that all storage allocated to SALS gets freed. */
5486 make_cleanup (xfree
, sals
.sals
);
5488 /* Allocate space for all the cond expressions. */
5489 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5490 make_cleanup (xfree
, cond
);
5492 /* Allocate space for all the cond strings. */
5493 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5494 make_cleanup (xfree
, cond_string
);
5496 /* ----------------------------- SNIP -----------------------------
5497 Anything added to the cleanup chain beyond this point is assumed
5498 to be part of a breakpoint. If the breakpoint create goes
5499 through then that memory is not cleaned up. */
5500 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5502 /* Mark the contents of the addr_string for cleanup. These go on
5503 the breakpoint_chain and only occure if the breakpoint create
5505 for (i
= 0; i
< sals
.nelts
; i
++)
5507 if (addr_string
[i
] != NULL
)
5508 make_cleanup (xfree
, addr_string
[i
]);
5511 /* Wait until now before checking for garbage at the end of the
5512 address. That way cleanups can take care of freeing any
5514 if (*address_end
!= '\0')
5515 error (_("Garbage %s following breakpoint address"), address_end
);
5517 /* Resolve all line numbers to PC's. */
5518 breakpoint_sals_to_pc (&sals
, args
->address
);
5520 /* Verify that conditions can be parsed, before setting any
5522 for (i
= 0; i
< sals
.nelts
; i
++)
5524 if (args
->condition
!= NULL
)
5526 char *tok
= args
->condition
;
5527 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
5529 error (_("Garbage %s follows condition"), tok
);
5530 make_cleanup (xfree
, cond
[i
]);
5531 cond_string
[i
] = xstrdup (args
->condition
);
5535 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5536 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5537 args
->tempflag
? disp_del
: disp_donttouch
,
5538 args
->thread
, args
->ignore_count
, 0/*from-tty*/,
5539 NULL
/*pending_bp*/);
5541 /* That's it. Discard the cleanups for data inserted into the
5543 discard_cleanups (breakpoint_chain
);
5544 /* But cleanup everything else. */
5545 do_cleanups (old_chain
);
5550 gdb_breakpoint (char *address
, char *condition
,
5551 int hardwareflag
, int tempflag
,
5552 int thread
, int ignore_count
,
5553 char **error_message
)
5555 struct captured_breakpoint_args args
;
5556 args
.address
= address
;
5557 args
.condition
= condition
;
5558 args
.hardwareflag
= hardwareflag
;
5559 args
.tempflag
= tempflag
;
5560 args
.thread
= thread
;
5561 args
.ignore_count
= ignore_count
;
5562 return catch_exceptions_with_msg (uiout
, do_captured_breakpoint
, &args
,
5563 error_message
, RETURN_MASK_ALL
);
5567 /* Helper function for break_command_1 and disassemble_command. */
5570 resolve_sal_pc (struct symtab_and_line
*sal
)
5574 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5576 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5577 error (_("No line %d in file \"%s\"."),
5578 sal
->line
, sal
->symtab
->filename
);
5582 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5584 struct blockvector
*bv
;
5589 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5592 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5593 sym
= block_function (b
);
5596 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5597 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5601 /* It really is worthwhile to have the section, so we'll just
5602 have to look harder. This case can be executed if we have
5603 line numbers but no functions (as can happen in assembly
5606 struct minimal_symbol
*msym
;
5608 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5610 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5617 break_command (char *arg
, int from_tty
)
5619 break_command_1 (arg
, 0, from_tty
, NULL
);
5623 tbreak_command (char *arg
, int from_tty
)
5625 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
, NULL
);
5629 hbreak_command (char *arg
, int from_tty
)
5631 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
, NULL
);
5635 thbreak_command (char *arg
, int from_tty
)
5637 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
, NULL
);
5641 stop_command (char *arg
, int from_tty
)
5643 printf_filtered (_("Specify the type of breakpoint to set.\n\
5644 Usage: stop in <function | address>\n\
5645 stop at <line>\n"));
5649 stopin_command (char *arg
, int from_tty
)
5653 if (arg
== (char *) NULL
)
5655 else if (*arg
!= '*')
5660 /* look for a ':'. If this is a line number specification, then
5661 say it is bad, otherwise, it should be an address or
5662 function/method name */
5663 while (*argptr
&& !hasColon
)
5665 hasColon
= (*argptr
== ':');
5670 badInput
= (*argptr
!= ':'); /* Not a class::method */
5672 badInput
= isdigit (*arg
); /* a simple line number */
5676 printf_filtered (_("Usage: stop in <function | address>\n"));
5678 break_command_1 (arg
, 0, from_tty
, NULL
);
5682 stopat_command (char *arg
, int from_tty
)
5686 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5693 /* look for a ':'. If there is a '::' then get out, otherwise
5694 it is probably a line number. */
5695 while (*argptr
&& !hasColon
)
5697 hasColon
= (*argptr
== ':');
5702 badInput
= (*argptr
== ':'); /* we have class::method */
5704 badInput
= !isdigit (*arg
); /* not a line number */
5708 printf_filtered (_("Usage: stop at <line>\n"));
5710 break_command_1 (arg
, 0, from_tty
, NULL
);
5713 /* accessflag: hw_write: watch write,
5714 hw_read: watch read,
5715 hw_access: watch access (read or write) */
5717 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5719 struct breakpoint
*b
;
5720 struct symtab_and_line sal
;
5721 struct expression
*exp
;
5722 struct block
*exp_valid_block
;
5723 struct value
*val
, *mark
;
5724 struct frame_info
*frame
;
5725 struct frame_info
*prev_frame
= NULL
;
5726 char *exp_start
= NULL
;
5727 char *exp_end
= NULL
;
5728 char *tok
, *end_tok
;
5730 char *cond_start
= NULL
;
5731 char *cond_end
= NULL
;
5732 struct expression
*cond
= NULL
;
5733 int i
, other_type_used
, target_resources_ok
= 0;
5734 enum bptype bp_type
;
5737 init_sal (&sal
); /* initialize to zeroes */
5739 /* Parse arguments. */
5740 innermost_block
= NULL
;
5742 exp
= parse_exp_1 (&arg
, 0, 0);
5744 exp_valid_block
= innermost_block
;
5745 mark
= value_mark ();
5746 val
= evaluate_expression (exp
);
5747 release_value (val
);
5748 if (value_lazy (val
))
5749 value_fetch_lazy (val
);
5752 while (*tok
== ' ' || *tok
== '\t')
5756 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5759 toklen
= end_tok
- tok
;
5760 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5762 tok
= cond_start
= end_tok
+ 1;
5763 cond
= parse_exp_1 (&tok
, 0, 0);
5767 error (_("Junk at end of command."));
5769 if (accessflag
== hw_read
)
5770 bp_type
= bp_read_watchpoint
;
5771 else if (accessflag
== hw_access
)
5772 bp_type
= bp_access_watchpoint
;
5774 bp_type
= bp_hardware_watchpoint
;
5776 mem_cnt
= can_use_hardware_watchpoint (val
);
5777 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5778 error (_("Expression cannot be implemented with read/access watchpoint."));
5781 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5782 target_resources_ok
=
5783 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5785 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5786 error (_("Target does not support this type of hardware watchpoint."));
5788 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5789 error (_("Target can only support one kind of HW watchpoint at a time."));
5792 #if defined(HPUXHPPA)
5793 /* On HP-UX if you set a h/w
5794 watchpoint before the "run" command, the inferior dies with a e.g.,
5795 SIGILL once you start it. I initially believed this was due to a
5796 bad interaction between page protection traps and the initial
5797 startup sequence by the dynamic linker.
5799 However, I tried avoiding that by having HP-UX's implementation of
5800 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5801 yet, which forced slow watches before a "run" or "attach", and it
5802 still fails somewhere in the startup code.
5804 Until I figure out what's happening, I'm disallowing watches altogether
5805 before the "run" or "attach" command. We'll tell the user they must
5806 set watches after getting the program started. */
5807 if (!target_has_execution
)
5809 warning (_("can't do that without a running program; try \"break main\"), \"run\" first");
5812 #endif /* HPUXHPPA */
5814 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5815 watchpoint could not be set. */
5816 if (!mem_cnt
|| target_resources_ok
<= 0)
5817 bp_type
= bp_watchpoint
;
5819 /* Now set up the breakpoint. */
5820 b
= set_raw_breakpoint (sal
, bp_type
);
5821 set_breakpoint_count (breakpoint_count
+ 1);
5822 b
->number
= breakpoint_count
;
5823 b
->disposition
= disp_donttouch
;
5825 b
->exp_valid_block
= exp_valid_block
;
5826 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5830 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5834 frame
= block_innermost_frame (exp_valid_block
);
5837 prev_frame
= get_prev_frame (frame
);
5838 b
->watchpoint_frame
= get_frame_id (frame
);
5842 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5845 /* If the expression is "local", then set up a "watchpoint scope"
5846 breakpoint at the point where we've left the scope of the watchpoint
5848 if (innermost_block
)
5852 struct breakpoint
*scope_breakpoint
;
5853 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5854 bp_watchpoint_scope
);
5856 scope_breakpoint
->enable_state
= bp_enabled
;
5858 /* Automatically delete the breakpoint when it hits. */
5859 scope_breakpoint
->disposition
= disp_del
;
5861 /* Only break in the proper frame (help with recursion). */
5862 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5864 /* Set the address at which we will stop. */
5865 scope_breakpoint
->loc
->requested_address
5866 = get_frame_pc (prev_frame
);
5867 scope_breakpoint
->loc
->address
5868 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
5869 scope_breakpoint
->type
);
5871 /* The scope breakpoint is related to the watchpoint. We
5872 will need to act on them together. */
5873 b
->related_breakpoint
= scope_breakpoint
;
5876 value_free_to_mark (mark
);
5880 /* Return count of locations need to be watched and can be handled
5881 in hardware. If the watchpoint can not be handled
5882 in hardware return zero. */
5885 can_use_hardware_watchpoint (struct value
*v
)
5887 int found_memory_cnt
= 0;
5888 struct value
*head
= v
;
5890 /* Did the user specifically forbid us to use hardware watchpoints? */
5891 if (!can_use_hw_watchpoints
)
5894 /* Make sure that the value of the expression depends only upon
5895 memory contents, and values computed from them within GDB. If we
5896 find any register references or function calls, we can't use a
5897 hardware watchpoint.
5899 The idea here is that evaluating an expression generates a series
5900 of values, one holding the value of every subexpression. (The
5901 expression a*b+c has five subexpressions: a, b, a*b, c, and
5902 a*b+c.) GDB's values hold almost enough information to establish
5903 the criteria given above --- they identify memory lvalues,
5904 register lvalues, computed values, etcetera. So we can evaluate
5905 the expression, and then scan the chain of values that leaves
5906 behind to decide whether we can detect any possible change to the
5907 expression's final value using only hardware watchpoints.
5909 However, I don't think that the values returned by inferior
5910 function calls are special in any way. So this function may not
5911 notice that an expression involving an inferior function call
5912 can't be watched with hardware watchpoints. FIXME. */
5913 for (; v
; v
= value_next (v
))
5915 if (VALUE_LVAL (v
) == lval_memory
)
5918 /* A lazy memory lvalue is one that GDB never needed to fetch;
5919 we either just used its address (e.g., `a' in `a.b') or
5920 we never needed it at all (e.g., `a' in `a,b'). */
5924 /* Ahh, memory we actually used! Check if we can cover
5925 it with hardware watchpoints. */
5926 struct type
*vtype
= check_typedef (value_type (v
));
5928 /* We only watch structs and arrays if user asked for it
5929 explicitly, never if they just happen to appear in a
5930 middle of some value chain. */
5932 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5933 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5935 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
5936 int len
= TYPE_LENGTH (value_type (v
));
5938 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5945 else if (VALUE_LVAL (v
) != not_lval
5946 && deprecated_value_modifiable (v
) == 0)
5947 return 0; /* ??? What does this represent? */
5948 else if (VALUE_LVAL (v
) == lval_register
)
5949 return 0; /* cannot watch a register with a HW watchpoint */
5952 /* The expression itself looks suitable for using a hardware
5953 watchpoint, but give the target machine a chance to reject it. */
5954 return found_memory_cnt
;
5958 watch_command_wrapper (char *arg
, int from_tty
)
5960 watch_command (arg
, from_tty
);
5964 watch_command (char *arg
, int from_tty
)
5966 watch_command_1 (arg
, hw_write
, from_tty
);
5970 rwatch_command_wrapper (char *arg
, int from_tty
)
5972 rwatch_command (arg
, from_tty
);
5976 rwatch_command (char *arg
, int from_tty
)
5978 watch_command_1 (arg
, hw_read
, from_tty
);
5982 awatch_command_wrapper (char *arg
, int from_tty
)
5984 awatch_command (arg
, from_tty
);
5988 awatch_command (char *arg
, int from_tty
)
5990 watch_command_1 (arg
, hw_access
, from_tty
);
5994 /* Helper routines for the until_command routine in infcmd.c. Here
5995 because it uses the mechanisms of breakpoints. */
5997 /* This function is called by fetch_inferior_event via the
5998 cmd_continuation pointer, to complete the until command. It takes
5999 care of cleaning up the temporary breakpoints set up by the until
6002 until_break_command_continuation (struct continuation_arg
*arg
)
6004 struct cleanup
*cleanups
;
6006 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
6007 do_exec_cleanups (cleanups
);
6011 until_break_command (char *arg
, int from_tty
, int anywhere
)
6013 struct symtabs_and_lines sals
;
6014 struct symtab_and_line sal
;
6015 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
6016 struct breakpoint
*breakpoint
;
6017 struct cleanup
*old_chain
;
6018 struct continuation_arg
*arg1
;
6021 clear_proceed_status ();
6023 /* Set a breakpoint where the user wants it and at return from
6026 if (default_breakpoint_valid
)
6027 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
6028 default_breakpoint_line
, (char ***) NULL
, NULL
);
6030 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
6031 0, (char ***) NULL
, NULL
);
6033 if (sals
.nelts
!= 1)
6034 error (_("Couldn't get information on specified line."));
6037 xfree (sals
.sals
); /* malloc'd, so freed */
6040 error (_("Junk at end of arguments."));
6042 resolve_sal_pc (&sal
);
6045 /* If the user told us to continue until a specified location,
6046 we don't specify a frame at which we need to stop. */
6047 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
6049 /* Otherwise, specify the current frame, because we want to stop only
6050 at the very same frame. */
6051 breakpoint
= set_momentary_breakpoint (sal
,
6052 get_frame_id (deprecated_selected_frame
),
6055 if (!target_can_async_p ())
6056 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
6058 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
6060 /* If we are running asynchronously, and the target supports async
6061 execution, we are not waiting for the target to stop, in the call
6062 tp proceed, below. This means that we cannot delete the
6063 brekpoints until the target has actually stopped. The only place
6064 where we get a chance to do that is in fetch_inferior_event, so
6065 we must set things up for that. */
6067 if (target_can_async_p ())
6069 /* In this case the arg for the continuation is just the point
6070 in the exec_cleanups chain from where to start doing
6071 cleanups, because all the continuation does is the cleanups in
6072 the exec_cleanup_chain. */
6074 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
6076 arg1
->data
.pointer
= old_chain
;
6078 add_continuation (until_break_command_continuation
, arg1
);
6081 /* Keep within the current frame, or in frames called by the current
6085 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6086 sal
.pc
= get_frame_pc (prev_frame
);
6087 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6089 if (!target_can_async_p ())
6090 make_cleanup_delete_breakpoint (breakpoint
);
6092 make_exec_cleanup_delete_breakpoint (breakpoint
);
6095 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6096 /* Do the cleanups now, anly if we are not running asynchronously,
6097 of if we are, but the target is still synchronous. */
6098 if (!target_can_async_p ())
6099 do_cleanups (old_chain
);
6103 ep_skip_leading_whitespace (char **s
)
6105 if ((s
== NULL
) || (*s
== NULL
))
6107 while (isspace (**s
))
6111 /* This function examines a string, and attempts to find a token
6112 that might be an event name in the leading characters. If a
6113 possible match is found, a pointer to the last character of
6114 the token is returned. Else, NULL is returned. */
6117 ep_find_event_name_end (char *arg
)
6120 char *event_name_end
= NULL
;
6122 /* If we could depend upon the presense of strrpbrk, we'd use that... */
6126 /* We break out of the loop when we find a token delimiter.
6127 Basically, we're looking for alphanumerics and underscores;
6128 anything else delimites the token. */
6131 if (!isalnum (*s
) && (*s
!= '_'))
6137 return event_name_end
;
6141 /* This function attempts to parse an optional "if <cond>" clause
6142 from the arg string. If one is not found, it returns NULL.
6144 Else, it returns a pointer to the condition string. (It does not
6145 attempt to evaluate the string against a particular block.) And,
6146 it updates arg to point to the first character following the parsed
6147 if clause in the arg string. */
6150 ep_parse_optional_if_clause (char **arg
)
6154 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6157 /* Skip the "if" keyword. */
6160 /* Skip any extra leading whitespace, and record the start of the
6161 condition string. */
6162 ep_skip_leading_whitespace (arg
);
6165 /* Assume that the condition occupies the remainder of the arg string. */
6166 (*arg
) += strlen (cond_string
);
6171 /* This function attempts to parse an optional filename from the arg
6172 string. If one is not found, it returns NULL.
6174 Else, it returns a pointer to the parsed filename. (This function
6175 makes no attempt to verify that a file of that name exists, or is
6176 accessible.) And, it updates arg to point to the first character
6177 following the parsed filename in the arg string.
6179 Note that clients needing to preserve the returned filename for
6180 future access should copy it to their own buffers. */
6182 ep_parse_optional_filename (char **arg
)
6184 static char filename
[1024];
6189 if ((*arg_p
== '\0') || isspace (*arg_p
))
6207 /* Commands to deal with catching events, such as signals, exceptions,
6208 process start/exit, etc. */
6212 catch_fork
, catch_vfork
6217 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6220 char *cond_string
= NULL
;
6222 ep_skip_leading_whitespace (&arg
);
6224 /* The allowed syntax is:
6226 catch [v]fork if <cond>
6228 First, check if there's an if clause. */
6229 cond_string
= ep_parse_optional_if_clause (&arg
);
6231 if ((*arg
!= '\0') && !isspace (*arg
))
6232 error (_("Junk at end of arguments."));
6234 /* If this target supports it, create a fork or vfork catchpoint
6235 and enable reporting of such events. */
6239 create_fork_event_catchpoint (tempflag
, cond_string
);
6242 create_vfork_event_catchpoint (tempflag
, cond_string
);
6245 error (_("unsupported or unknown fork kind; cannot catch it"));
6251 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6253 char *cond_string
= NULL
;
6255 ep_skip_leading_whitespace (&arg
);
6257 /* The allowed syntax is:
6259 catch exec if <cond>
6261 First, check if there's an if clause. */
6262 cond_string
= ep_parse_optional_if_clause (&arg
);
6264 if ((*arg
!= '\0') && !isspace (*arg
))
6265 error (_("Junk at end of arguments."));
6267 /* If this target supports it, create an exec catchpoint
6268 and enable reporting of such events. */
6269 create_exec_event_catchpoint (tempflag
, cond_string
);
6273 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6275 char *dll_pathname
= NULL
;
6276 char *cond_string
= NULL
;
6278 ep_skip_leading_whitespace (&arg
);
6280 /* The allowed syntax is:
6282 catch load if <cond>
6283 catch load <filename>
6284 catch load <filename> if <cond>
6286 The user is not allowed to specify the <filename> after an
6289 We'll ignore the pathological case of a file named "if".
6291 First, check if there's an if clause. If so, then there
6292 cannot be a filename. */
6293 cond_string
= ep_parse_optional_if_clause (&arg
);
6295 /* If there was an if clause, then there cannot be a filename.
6296 Else, there might be a filename and an if clause. */
6297 if (cond_string
== NULL
)
6299 dll_pathname
= ep_parse_optional_filename (&arg
);
6300 ep_skip_leading_whitespace (&arg
);
6301 cond_string
= ep_parse_optional_if_clause (&arg
);
6304 if ((*arg
!= '\0') && !isspace (*arg
))
6305 error (_("Junk at end of arguments."));
6307 /* Create a load breakpoint that only triggers when a load of
6308 the specified dll (or any dll, if no pathname was specified)
6310 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6311 dll_pathname
, cond_string
);
6315 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6317 char *dll_pathname
= NULL
;
6318 char *cond_string
= NULL
;
6320 ep_skip_leading_whitespace (&arg
);
6322 /* The allowed syntax is:
6324 catch unload if <cond>
6325 catch unload <filename>
6326 catch unload <filename> if <cond>
6328 The user is not allowed to specify the <filename> after an
6331 We'll ignore the pathological case of a file named "if".
6333 First, check if there's an if clause. If so, then there
6334 cannot be a filename. */
6335 cond_string
= ep_parse_optional_if_clause (&arg
);
6337 /* If there was an if clause, then there cannot be a filename.
6338 Else, there might be a filename and an if clause. */
6339 if (cond_string
== NULL
)
6341 dll_pathname
= ep_parse_optional_filename (&arg
);
6342 ep_skip_leading_whitespace (&arg
);
6343 cond_string
= ep_parse_optional_if_clause (&arg
);
6346 if ((*arg
!= '\0') && !isspace (*arg
))
6347 error (_("Junk at end of arguments."));
6349 /* Create an unload breakpoint that only triggers when an unload of
6350 the specified dll (or any dll, if no pathname was specified)
6352 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6353 dll_pathname
, cond_string
);
6356 /* Commands to deal with catching exceptions. */
6358 /* Set a breakpoint at the specified callback routine for an
6359 exception event callback */
6362 create_exception_catchpoint (int tempflag
, char *cond_string
,
6363 enum exception_event_kind ex_event
,
6364 struct symtab_and_line
*sal
)
6366 struct breakpoint
*b
;
6367 int thread
= -1; /* All threads. */
6370 if (!sal
) /* no exception support? */
6375 case EX_EVENT_THROW
:
6376 bptype
= bp_catch_throw
;
6378 case EX_EVENT_CATCH
:
6379 bptype
= bp_catch_catch
;
6381 default: /* error condition */
6382 error (_("Internal error -- invalid catchpoint kind"));
6385 b
= set_raw_breakpoint (*sal
, bptype
);
6386 set_breakpoint_count (breakpoint_count
+ 1);
6387 b
->number
= breakpoint_count
;
6389 b
->cond_string
= (cond_string
== NULL
) ?
6390 NULL
: savestring (cond_string
, strlen (cond_string
));
6392 b
->addr_string
= NULL
;
6393 b
->enable_state
= bp_enabled
;
6394 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6398 static enum print_stop_action
6399 print_exception_catchpoint (struct breakpoint
*b
)
6401 annotate_catchpoint (b
->number
);
6403 if (strstr (b
->addr_string
, "throw") != NULL
)
6404 printf_filtered (_("\nCatchpoint %d (exception thrown)\n"),
6407 printf_filtered (_("\nCatchpoint %d (exception caught)\n"),
6410 return PRINT_SRC_AND_LOC
;
6414 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6419 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6422 *last_addr
= b
->loc
->address
;
6423 if (strstr (b
->addr_string
, "throw") != NULL
)
6424 ui_out_field_string (uiout
, "what", "exception throw");
6426 ui_out_field_string (uiout
, "what", "exception catch");
6430 print_mention_exception_catchpoint (struct breakpoint
*b
)
6432 if (strstr (b
->addr_string
, "throw") != NULL
)
6433 printf_filtered (_("Catchpoint %d (throw)"), b
->number
);
6435 printf_filtered (_("Catchpoint %d (catch)"), b
->number
);
6438 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6439 print_exception_catchpoint
,
6440 print_one_exception_catchpoint
,
6441 print_mention_exception_catchpoint
6445 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6446 enum exception_event_kind ex_event
, int from_tty
)
6448 char *trigger_func_name
, *nameptr
;
6449 struct symtabs_and_lines sals
;
6450 struct breakpoint
*b
;
6452 if (ex_event
== EX_EVENT_CATCH
)
6453 trigger_func_name
= xstrdup ("__cxa_begin_catch");
6455 trigger_func_name
= xstrdup ("__cxa_throw");
6457 nameptr
= trigger_func_name
;
6458 sals
= decode_line_1 (&nameptr
, 1, NULL
, 0, NULL
, NULL
);
6459 if (sals
.nelts
== 0)
6461 xfree (trigger_func_name
);
6465 b
= set_raw_breakpoint (sals
.sals
[0], bp_breakpoint
);
6466 set_breakpoint_count (breakpoint_count
+ 1);
6467 b
->number
= breakpoint_count
;
6469 b
->cond_string
= (cond_string
== NULL
) ?
6470 NULL
: savestring (cond_string
, strlen (cond_string
));
6472 b
->addr_string
= trigger_func_name
;
6473 b
->enable_state
= bp_enabled
;
6474 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6475 b
->ops
= &gnu_v3_exception_catchpoint_ops
;
6482 /* Deal with "catch catch" and "catch throw" commands */
6485 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6486 int tempflag
, int from_tty
)
6488 char *cond_string
= NULL
;
6489 struct symtab_and_line
*sal
= NULL
;
6491 ep_skip_leading_whitespace (&arg
);
6493 cond_string
= ep_parse_optional_if_clause (&arg
);
6495 if ((*arg
!= '\0') && !isspace (*arg
))
6496 error (_("Junk at end of arguments."));
6498 if ((ex_event
!= EX_EVENT_THROW
) &&
6499 (ex_event
!= EX_EVENT_CATCH
))
6500 error (_("Unsupported or unknown exception event; cannot catch it"));
6502 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6505 /* See if we can find a callback routine */
6506 sal
= target_enable_exception_callback (ex_event
, 1);
6510 /* We have callbacks from the runtime system for exceptions.
6511 Set a breakpoint on the sal found, if no errors */
6512 if (sal
!= (struct symtab_and_line
*) -1)
6513 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6515 return; /* something went wrong with setting up callbacks */
6518 warning (_("Unsupported with this platform/compiler combination."));
6521 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6522 inside a catch_errors */
6525 cover_target_enable_exception_callback (void *arg
)
6527 args_for_catchpoint_enable
*args
= arg
;
6528 struct symtab_and_line
*sal
;
6529 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6532 else if (sal
== (struct symtab_and_line
*) -1)
6535 return 1; /*is valid */
6539 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6542 /* The first argument may be an event name, such as "start" or "load".
6543 If so, then handle it as such. If it doesn't match an event name,
6544 then attempt to interpret it as an exception name. (This latter is
6545 the v4.16-and-earlier GDB meaning of the "catch" command.)
6547 First, try to find the bounds of what might be an event name. */
6548 char *arg1_start
= arg
;
6552 if (arg1_start
== NULL
)
6554 /* Old behaviour was to use pre-v-4.16 syntax */
6555 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6557 /* Now, this is not allowed */
6558 error (_("Catch requires an event name."));
6561 arg1_end
= ep_find_event_name_end (arg1_start
);
6562 if (arg1_end
== NULL
)
6563 error (_("catch requires an event"));
6564 arg1_length
= arg1_end
+ 1 - arg1_start
;
6566 /* Try to match what we found against known event names. */
6567 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6569 error (_("Catch of signal not yet implemented"));
6571 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6573 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6574 tempflag
, from_tty
);
6576 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6578 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6579 tempflag
, from_tty
);
6581 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6583 error (_("Catch of thread_start not yet implemented"));
6585 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6587 error (_("Catch of thread_exit not yet implemented"));
6589 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6591 error (_("Catch of thread_join not yet implemented"));
6593 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6595 error (_("Catch of start not yet implemented"));
6597 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6599 error (_("Catch of exit not yet implemented"));
6601 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6603 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6605 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6607 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6609 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6611 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6613 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6615 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6617 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6619 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6621 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6623 error (_("Catch of stop not yet implemented"));
6626 /* This doesn't appear to be an event name */
6630 /* Pre-v.4.16 behaviour was to treat the argument
6631 as the name of an exception */
6632 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6633 /* Now this is not allowed */
6634 error (_("Unknown event kind specified for catch"));
6639 /* Used by the gui, could be made a worker for other things. */
6642 set_breakpoint_sal (struct symtab_and_line sal
)
6644 struct breakpoint
*b
;
6645 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6646 set_breakpoint_count (breakpoint_count
+ 1);
6647 b
->number
= breakpoint_count
;
6654 catch_command (char *arg
, int from_tty
)
6656 catch_command_1 (arg
, 0, from_tty
);
6661 tcatch_command (char *arg
, int from_tty
)
6663 catch_command_1 (arg
, 1, from_tty
);
6666 /* Delete breakpoints by address or line. */
6669 clear_command (char *arg
, int from_tty
)
6671 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6673 struct symtabs_and_lines sals
;
6674 struct symtab_and_line sal
;
6679 sals
= decode_line_spec (arg
, 1);
6684 sals
.sals
= (struct symtab_and_line
*)
6685 xmalloc (sizeof (struct symtab_and_line
));
6686 make_cleanup (xfree
, sals
.sals
);
6687 init_sal (&sal
); /* initialize to zeroes */
6688 sal
.line
= default_breakpoint_line
;
6689 sal
.symtab
= default_breakpoint_symtab
;
6690 sal
.pc
= default_breakpoint_address
;
6691 if (sal
.symtab
== 0)
6692 error (_("No source file specified."));
6700 /* For each line spec given, delete bps which correspond
6701 to it. Do it in two passes, solely to preserve the current
6702 behavior that from_tty is forced true if we delete more than
6706 for (i
= 0; i
< sals
.nelts
; i
++)
6708 /* If exact pc given, clear bpts at that pc.
6709 If line given (pc == 0), clear all bpts on specified line.
6710 If defaulting, clear all bpts on default line
6713 defaulting sal.pc != 0 tests to do
6718 1 0 <can't happen> */
6723 /* Find all matching breakpoints, remove them from the
6724 breakpoint chain, and add them to the 'found' chain. */
6725 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6727 /* Are we going to delete b? */
6728 if (b
->type
!= bp_none
6729 && b
->type
!= bp_watchpoint
6730 && b
->type
!= bp_hardware_watchpoint
6731 && b
->type
!= bp_read_watchpoint
6732 && b
->type
!= bp_access_watchpoint
6733 /* Not if b is a watchpoint of any sort... */
6734 && (((sal
.pc
&& (b
->loc
->address
== sal
.pc
))
6735 && (!section_is_overlay (b
->loc
->section
)
6736 || b
->loc
->section
== sal
.section
))
6737 /* Yes, if sal.pc matches b (modulo overlays). */
6738 || ((default_match
|| (0 == sal
.pc
))
6739 && b
->source_file
!= NULL
6740 && sal
.symtab
!= NULL
6741 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6742 && b
->line_number
== sal
.line
)))
6743 /* Yes, if sal source file and line matches b. */
6745 /* Remove it from breakpoint_chain... */
6746 if (b
== breakpoint_chain
)
6748 /* b is at the head of the list */
6749 breakpoint_chain
= b
->next
;
6753 prev
->next
= b
->next
;
6755 /* And add it to 'found' chain. */
6761 /* Keep b, and keep a pointer to it. */
6766 /* Now go thru the 'found' chain and delete them. */
6770 error (_("No breakpoint at %s."), arg
);
6772 error (_("No breakpoint at this line."));
6776 from_tty
= 1; /* Always report if deleted more than one */
6780 printf_unfiltered (_("Deleted breakpoint "));
6782 printf_unfiltered (_("Deleted breakpoints "));
6784 breakpoints_changed ();
6788 printf_unfiltered ("%d ", found
->number
);
6790 delete_breakpoint (found
);
6794 putchar_unfiltered ('\n');
6797 /* Delete breakpoint in BS if they are `delete' breakpoints and
6798 all breakpoints that are marked for deletion, whether hit or not.
6799 This is called after any breakpoint is hit, or after errors. */
6802 breakpoint_auto_delete (bpstat bs
)
6804 struct breakpoint
*b
, *temp
;
6806 for (; bs
; bs
= bs
->next
)
6807 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6809 delete_breakpoint (bs
->breakpoint_at
);
6811 ALL_BREAKPOINTS_SAFE (b
, temp
)
6813 if (b
->disposition
== disp_del_at_next_stop
)
6814 delete_breakpoint (b
);
6818 /* Delete a breakpoint and clean up all traces of it in the data
6822 delete_breakpoint (struct breakpoint
*bpt
)
6824 struct breakpoint
*b
;
6826 struct bp_location
*loc
;
6828 gdb_assert (bpt
!= NULL
);
6830 /* Has this bp already been deleted? This can happen because multiple
6831 lists can hold pointers to bp's. bpstat lists are especial culprits.
6833 One example of this happening is a watchpoint's scope bp. When the
6834 scope bp triggers, we notice that the watchpoint is out of scope, and
6835 delete it. We also delete its scope bp. But the scope bp is marked
6836 "auto-deleting", and is already on a bpstat. That bpstat is then
6837 checked for auto-deleting bp's, which are deleted.
6839 A real solution to this problem might involve reference counts in bp's,
6840 and/or giving them pointers back to their referencing bpstat's, and
6841 teaching delete_breakpoint to only free a bp's storage when no more
6842 references were extent. A cheaper bandaid was chosen. */
6843 if (bpt
->type
== bp_none
)
6846 if (deprecated_delete_breakpoint_hook
)
6847 deprecated_delete_breakpoint_hook (bpt
);
6848 breakpoint_delete_event (bpt
->number
);
6850 if (bpt
->loc
->inserted
)
6851 remove_breakpoint (bpt
->loc
, mark_inserted
);
6853 free_valchain (bpt
->loc
);
6855 if (breakpoint_chain
== bpt
)
6856 breakpoint_chain
= bpt
->next
;
6858 if (bp_location_chain
== bpt
->loc
)
6859 bp_location_chain
= bpt
->loc
->next
;
6861 /* If we have callback-style exception catchpoints, don't go through
6862 the adjustments to the C++ runtime library etc. if the inferior
6863 isn't actually running. target_enable_exception_callback for a
6864 null target ops vector gives an undesirable error message, so we
6865 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6866 exceptions are supported in this way, it's OK for now. FIXME */
6867 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6869 /* Format possible error msg */
6870 char *message
= xstrprintf ("Error in deleting catchpoint %d:\n",
6872 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
6873 args_for_catchpoint_enable args
;
6874 args
.kind
= bpt
->type
== bp_catch_catch
?
6875 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6877 catch_errors (cover_target_enable_exception_callback
, &args
,
6878 message
, RETURN_MASK_ALL
);
6879 do_cleanups (cleanups
);
6886 b
->next
= bpt
->next
;
6890 ALL_BP_LOCATIONS (loc
)
6891 if (loc
->next
== bpt
->loc
)
6893 loc
->next
= bpt
->loc
->next
;
6897 check_duplicates (bpt
);
6898 /* If this breakpoint was inserted, and there is another breakpoint
6899 at the same address, we need to insert the other breakpoint. */
6900 if (bpt
->loc
->inserted
6901 && bpt
->type
!= bp_hardware_watchpoint
6902 && bpt
->type
!= bp_read_watchpoint
6903 && bpt
->type
!= bp_access_watchpoint
6904 && bpt
->type
!= bp_catch_fork
6905 && bpt
->type
!= bp_catch_vfork
6906 && bpt
->type
!= bp_catch_exec
)
6909 if (b
->loc
->address
== bpt
->loc
->address
6910 && b
->loc
->section
== bpt
->loc
->section
6911 && !b
->loc
->duplicate
6912 && b
->enable_state
!= bp_disabled
6913 && b
->enable_state
!= bp_shlib_disabled
6915 && b
->enable_state
!= bp_call_disabled
)
6919 /* We should never reach this point if there is a permanent
6920 breakpoint at the same address as the one being deleted.
6921 If there is a permanent breakpoint somewhere, it should
6922 always be the only one inserted. */
6923 if (b
->enable_state
== bp_permanent
)
6924 internal_error (__FILE__
, __LINE__
,
6925 _("another breakpoint was inserted on top of "
6926 "a permanent breakpoint"));
6928 memset (&b
->loc
->target_info
, 0, sizeof (b
->loc
->target_info
));
6929 b
->loc
->target_info
.placed_address
= b
->loc
->address
;
6930 if (b
->type
== bp_hardware_breakpoint
)
6931 val
= target_insert_hw_breakpoint (&b
->loc
->target_info
);
6933 val
= target_insert_breakpoint (&b
->loc
->target_info
);
6935 /* If there was an error in the insert, print a message, then stop execution. */
6938 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6939 make_cleanup_ui_file_delete (tmp_error_stream
);
6942 if (b
->type
== bp_hardware_breakpoint
)
6944 fprintf_unfiltered (tmp_error_stream
,
6945 "Cannot insert hardware breakpoint %d.\n"
6946 "You may have requested too many hardware breakpoints.\n",
6951 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6952 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6953 deprecated_print_address_numeric (b
->loc
->address
, 1, tmp_error_stream
);
6954 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6955 safe_strerror (val
));
6958 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6959 target_terminal_ours_for_output ();
6960 error_stream(tmp_error_stream
);
6963 b
->loc
->inserted
= 1;
6967 free_command_lines (&bpt
->commands
);
6970 if (bpt
->cond_string
!= NULL
)
6971 xfree (bpt
->cond_string
);
6972 if (bpt
->addr_string
!= NULL
)
6973 xfree (bpt
->addr_string
);
6974 if (bpt
->exp
!= NULL
)
6976 if (bpt
->exp_string
!= NULL
)
6977 xfree (bpt
->exp_string
);
6978 if (bpt
->val
!= NULL
)
6979 value_free (bpt
->val
);
6980 if (bpt
->source_file
!= NULL
)
6981 xfree (bpt
->source_file
);
6982 if (bpt
->dll_pathname
!= NULL
)
6983 xfree (bpt
->dll_pathname
);
6984 if (bpt
->triggered_dll_pathname
!= NULL
)
6985 xfree (bpt
->triggered_dll_pathname
);
6986 if (bpt
->exec_pathname
!= NULL
)
6987 xfree (bpt
->exec_pathname
);
6989 /* Be sure no bpstat's are pointing at it after it's been freed. */
6990 /* FIXME, how can we find all bpstat's?
6991 We just check stop_bpstat for now. */
6992 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6993 if (bs
->breakpoint_at
== bpt
)
6995 bs
->breakpoint_at
= NULL
;
6997 /* bs->commands will be freed later. */
6999 /* On the chance that someone will soon try again to delete this same
7000 bp, we mark it as deleted before freeing its storage. */
7001 bpt
->type
= bp_none
;
7008 do_delete_breakpoint_cleanup (void *b
)
7010 delete_breakpoint (b
);
7014 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7016 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7020 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
7022 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
7026 delete_command (char *arg
, int from_tty
)
7028 struct breakpoint
*b
, *temp
;
7034 int breaks_to_delete
= 0;
7036 /* Delete all breakpoints if no argument.
7037 Do not delete internal or call-dummy breakpoints, these
7038 have to be deleted with an explicit breakpoint number argument. */
7041 if (b
->type
!= bp_call_dummy
&&
7042 b
->type
!= bp_shlib_event
&&
7043 b
->type
!= bp_thread_event
&&
7044 b
->type
!= bp_overlay_event
&&
7046 breaks_to_delete
= 1;
7049 /* Ask user only if there are some breakpoints to delete. */
7051 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
7053 ALL_BREAKPOINTS_SAFE (b
, temp
)
7055 if (b
->type
!= bp_call_dummy
&&
7056 b
->type
!= bp_shlib_event
&&
7057 b
->type
!= bp_thread_event
&&
7058 b
->type
!= bp_overlay_event
&&
7060 delete_breakpoint (b
);
7065 map_breakpoint_numbers (arg
, delete_breakpoint
);
7068 /* Reset a breakpoint given it's struct breakpoint * BINT.
7069 The value we return ends up being the return value from catch_errors.
7070 Unused in this case. */
7073 breakpoint_re_set_one (void *bint
)
7075 /* get past catch_errs */
7076 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7080 int *not_found_ptr
= NULL
;
7081 struct symtabs_and_lines sals
;
7083 enum enable_state save_enable
;
7088 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7092 case bp_hardware_breakpoint
:
7094 case bp_catch_unload
:
7095 if (b
->addr_string
== NULL
)
7097 /* Anything without a string can't be re-set. */
7098 delete_breakpoint (b
);
7101 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
7103 ``And a hack it is, although Apple's Darwin version of GDB
7104 contains an almost identical hack to implement a "future
7105 break" command. It seems to work in many real world cases,
7106 but it is easy to come up with a test case where the patch
7107 doesn't help at all.''
7109 ``It seems that the way GDB implements breakpoints - in -
7110 shared - libraries was designed for a.out shared library
7111 systems (SunOS 4) where shared libraries were loaded at a
7112 fixed address in memory. Since ELF shared libraries can (and
7113 will) be loaded at any address in memory, things break.
7114 Fixing this is not trivial. Therefore, I'm not sure whether
7115 we should add this hack to the branch only. I cannot
7116 guarantee that things will be fixed on the trunk in the near
7119 In case we have a problem, disable this breakpoint. We'll
7120 restore its status if we succeed. Don't disable a
7121 shlib_disabled breakpoint though. There's a fair chance we
7122 can't re-set it if the shared library it's in hasn't been
7128 save_enable
= b
->enable_state
;
7129 if (b
->enable_state
!= bp_shlib_disabled
)
7130 b
->enable_state
= bp_disabled
;
7132 /* If resetting a shlib-disabled breakpoint, we don't want to
7133 see an error message if it is not found since we will expect
7134 this to occur until the shared library is finally reloaded.
7135 We accomplish this by giving decode_line_1 a pointer to use
7136 for silent notification that the symbol is not found. */
7137 not_found_ptr
= ¬_found
;
7139 set_language (b
->language
);
7140 input_radix
= b
->input_radix
;
7142 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7144 for (i
= 0; i
< sals
.nelts
; i
++)
7146 resolve_sal_pc (&sals
.sals
[i
]);
7148 /* Reparse conditions, they might contain references to the
7150 if (b
->cond_string
!= NULL
)
7156 /* Avoid re-freeing b->exp if an error during the call
7160 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
7163 /* We need to re-set the breakpoint if the address changes... */
7164 if (b
->loc
->address
!= sals
.sals
[i
].pc
7165 /* ...or new and old breakpoints both have source files, and
7166 the source file name or the line number changes... */
7167 || (b
->source_file
!= NULL
7168 && sals
.sals
[i
].symtab
!= NULL
7169 && (strcmp (b
->source_file
, sals
.sals
[i
].symtab
->filename
) != 0
7170 || b
->line_number
!= sals
.sals
[i
].line
)
7172 /* ...or we switch between having a source file and not having
7174 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
7177 if (b
->source_file
!= NULL
)
7178 xfree (b
->source_file
);
7179 if (sals
.sals
[i
].symtab
== NULL
)
7180 b
->source_file
= NULL
;
7183 savestring (sals
.sals
[i
].symtab
->filename
,
7184 strlen (sals
.sals
[i
].symtab
->filename
));
7185 b
->line_number
= sals
.sals
[i
].line
;
7186 b
->loc
->requested_address
= sals
.sals
[i
].pc
;
7188 = adjust_breakpoint_address (b
->loc
->requested_address
,
7191 /* Used to check for duplicates here, but that can
7192 cause trouble, as it doesn't check for disabled
7197 /* Might be better to do this just once per breakpoint_re_set,
7198 rather than once for every breakpoint. */
7199 breakpoints_changed ();
7201 b
->loc
->section
= sals
.sals
[i
].section
;
7202 b
->enable_state
= save_enable
; /* Restore it, this worked. */
7205 /* Now that this is re-enabled, check_duplicates
7207 check_duplicates (b
);
7214 case bp_hardware_watchpoint
:
7215 case bp_read_watchpoint
:
7216 case bp_access_watchpoint
:
7217 innermost_block
= NULL
;
7218 /* The issue arises of what context to evaluate this in. The
7219 same one as when it was set, but what does that mean when
7220 symbols have been re-read? We could save the filename and
7221 functionname, but if the context is more local than that, the
7222 best we could do would be something like how many levels deep
7223 and which index at that particular level, but that's going to
7224 be less stable than filenames or function names. */
7226 /* So for now, just use a global context. */
7230 /* Avoid re-freeing b->exp if an error during the call to
7231 parse_expression. */
7234 b
->exp
= parse_expression (b
->exp_string
);
7235 b
->exp_valid_block
= innermost_block
;
7236 mark
= value_mark ();
7239 value_free (b
->val
);
7240 /* Avoid re-freeing b->val if an error during the call to
7241 evaluate_expression. */
7244 b
->val
= evaluate_expression (b
->exp
);
7245 release_value (b
->val
);
7246 if (value_lazy (b
->val
) && breakpoint_enabled (b
))
7247 value_fetch_lazy (b
->val
);
7249 if (b
->cond_string
!= NULL
)
7255 /* Avoid re-freeing b->exp if an error during the call
7259 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7261 if (breakpoint_enabled (b
))
7263 value_free_to_mark (mark
);
7265 case bp_catch_catch
:
7266 case bp_catch_throw
:
7268 /* We needn't really do anything to reset these, since the mask
7269 that requests them is unaffected by e.g., new libraries being
7272 case bp_catch_vfork
:
7277 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b
->type
);
7279 /* Delete longjmp and overlay event breakpoints; they will be
7280 reset later by breakpoint_re_set. */
7282 case bp_longjmp_resume
:
7283 case bp_overlay_event
:
7284 delete_breakpoint (b
);
7287 /* This breakpoint is special, it's set up when the inferior
7288 starts and we really don't want to touch it. */
7289 case bp_shlib_event
:
7291 /* Like bp_shlib_event, this breakpoint type is special.
7292 Once it is set up, we do not want to touch it. */
7293 case bp_thread_event
:
7295 /* Keep temporary breakpoints, which can be encountered when we step
7296 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7297 Otherwise these should have been blown away via the cleanup chain
7298 or by breakpoint_init_inferior when we rerun the executable. */
7301 case bp_watchpoint_scope
:
7303 case bp_step_resume
:
7310 /* Re-set all breakpoints after symbols have been re-loaded. */
7312 breakpoint_re_set (void)
7314 struct breakpoint
*b
, *temp
;
7315 enum language save_language
;
7316 int save_input_radix
;
7318 save_language
= current_language
->la_language
;
7319 save_input_radix
= input_radix
;
7320 ALL_BREAKPOINTS_SAFE (b
, temp
)
7322 /* Format possible error msg */
7323 char *message
= xstrprintf ("Error in re-setting breakpoint %d:\n",
7325 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7326 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7327 do_cleanups (cleanups
);
7329 set_language (save_language
);
7330 input_radix
= save_input_radix
;
7332 if (GET_LONGJMP_TARGET_P ())
7334 create_longjmp_breakpoint ("longjmp");
7335 create_longjmp_breakpoint ("_longjmp");
7336 create_longjmp_breakpoint ("siglongjmp");
7337 create_longjmp_breakpoint ("_siglongjmp");
7338 create_longjmp_breakpoint (NULL
);
7341 create_overlay_event_breakpoint ("_ovly_debug_event");
7344 /* Reset the thread number of this breakpoint:
7346 - If the breakpoint is for all threads, leave it as-is.
7347 - Else, reset it to the current thread for inferior_ptid. */
7349 breakpoint_re_set_thread (struct breakpoint
*b
)
7351 if (b
->thread
!= -1)
7353 if (in_thread_list (inferior_ptid
))
7354 b
->thread
= pid_to_thread_id (inferior_ptid
);
7358 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7359 If from_tty is nonzero, it prints a message to that effect,
7360 which ends with a period (no newline). */
7363 set_ignore_count (int bptnum
, int count
, int from_tty
)
7365 struct breakpoint
*b
;
7371 if (b
->number
== bptnum
)
7373 b
->ignore_count
= count
;
7377 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7379 else if (count
== 1)
7380 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7383 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7386 breakpoints_changed ();
7387 breakpoint_modify_event (b
->number
);
7391 error (_("No breakpoint number %d."), bptnum
);
7394 /* Clear the ignore counts of all breakpoints. */
7396 breakpoint_clear_ignore_counts (void)
7398 struct breakpoint
*b
;
7401 b
->ignore_count
= 0;
7404 /* Command to set ignore-count of breakpoint N to COUNT. */
7407 ignore_command (char *args
, int from_tty
)
7413 error_no_arg (_("a breakpoint number"));
7415 num
= get_number (&p
);
7417 error (_("bad breakpoint number: '%s'"), args
);
7419 error (_("Second argument (specified ignore-count) is missing."));
7421 set_ignore_count (num
,
7422 longest_to_int (value_as_long (parse_and_eval (p
))),
7425 printf_filtered ("\n");
7428 /* Call FUNCTION on each of the breakpoints
7429 whose numbers are given in ARGS. */
7432 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7437 struct breakpoint
*b
, *tmp
;
7441 error_no_arg (_("one or more breakpoint numbers"));
7448 num
= get_number_or_range (&p1
);
7451 warning (_("bad breakpoint number at or near '%s'"), p
);
7455 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7456 if (b
->number
== num
)
7458 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7461 if (related_breakpoint
)
7462 function (related_breakpoint
);
7466 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
7472 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7473 If from_tty is nonzero, it prints a message to that effect,
7474 which ends with a period (no newline). */
7477 disable_breakpoint (struct breakpoint
*bpt
)
7479 /* Never disable a watchpoint scope breakpoint; we want to
7480 hit them when we leave scope so we can delete both the
7481 watchpoint and its scope breakpoint at that time. */
7482 if (bpt
->type
== bp_watchpoint_scope
)
7485 /* You can't disable permanent breakpoints. */
7486 if (bpt
->enable_state
== bp_permanent
)
7489 bpt
->enable_state
= bp_disabled
;
7491 check_duplicates (bpt
);
7493 if (deprecated_modify_breakpoint_hook
)
7494 deprecated_modify_breakpoint_hook (bpt
);
7495 breakpoint_modify_event (bpt
->number
);
7499 disable_command (char *args
, int from_tty
)
7501 struct breakpoint
*bpt
;
7503 ALL_BREAKPOINTS (bpt
)
7507 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7512 case bp_catch_unload
:
7514 case bp_catch_vfork
:
7516 case bp_catch_catch
:
7517 case bp_catch_throw
:
7518 case bp_hardware_breakpoint
:
7520 case bp_hardware_watchpoint
:
7521 case bp_read_watchpoint
:
7522 case bp_access_watchpoint
:
7523 disable_breakpoint (bpt
);
7528 map_breakpoint_numbers (args
, disable_breakpoint
);
7532 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7534 int target_resources_ok
, other_type_used
;
7537 if (bpt
->type
== bp_hardware_breakpoint
)
7540 i
= hw_breakpoint_used_count ();
7541 target_resources_ok
=
7542 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7544 if (target_resources_ok
== 0)
7545 error (_("No hardware breakpoint support in the target."));
7546 else if (target_resources_ok
< 0)
7547 error (_("Hardware breakpoints used exceeds limit."));
7552 if (bpt
->enable_state
!= bp_enabled
)
7554 /* When enabling a pending breakpoint, we need to check if the breakpoint
7555 is resolvable since shared libraries could have been loaded
7556 after the breakpoint was disabled. */
7557 breakpoints_changed ();
7558 if (resolve_pending_breakpoint (bpt
) == GDB_RC_OK
)
7560 delete_breakpoint (bpt
);
7563 bpt
->enable_state
= bp_enabled
;
7564 bpt
->disposition
= disposition
;
7567 else /* Not a pending breakpoint. */
7569 if (bpt
->enable_state
!= bp_permanent
)
7570 bpt
->enable_state
= bp_enabled
;
7571 bpt
->disposition
= disposition
;
7572 check_duplicates (bpt
);
7573 breakpoints_changed ();
7575 if (bpt
->type
== bp_watchpoint
||
7576 bpt
->type
== bp_hardware_watchpoint
||
7577 bpt
->type
== bp_read_watchpoint
||
7578 bpt
->type
== bp_access_watchpoint
)
7580 struct frame_id saved_frame_id
;
7582 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
7583 if (bpt
->exp_valid_block
!= NULL
)
7585 struct frame_info
*fr
=
7586 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7589 printf_filtered (_("\
7590 Cannot enable watchpoint %d because the block in which its expression\n\
7591 is valid is not currently in scope.\n"), bpt
->number
);
7592 bpt
->enable_state
= bp_disabled
;
7598 value_free (bpt
->val
);
7599 mark
= value_mark ();
7600 bpt
->val
= evaluate_expression (bpt
->exp
);
7601 release_value (bpt
->val
);
7602 if (value_lazy (bpt
->val
))
7603 value_fetch_lazy (bpt
->val
);
7605 if (bpt
->type
== bp_hardware_watchpoint
||
7606 bpt
->type
== bp_read_watchpoint
||
7607 bpt
->type
== bp_access_watchpoint
)
7609 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7610 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7612 /* Hack around 'unused var' error for some targets here */
7614 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7615 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7616 /* we can consider of type is bp_hardware_watchpoint, convert to
7617 bp_watchpoint in the following condition */
7618 if (target_resources_ok
< 0)
7620 printf_filtered (_("\
7621 Cannot enable watchpoint %d because target watch resources\n\
7622 have been allocated for other watchpoints.\n"), bpt
->number
);
7623 bpt
->enable_state
= bp_disabled
;
7624 value_free_to_mark (mark
);
7629 select_frame (frame_find_by_id (saved_frame_id
));
7630 value_free_to_mark (mark
);
7634 if (deprecated_modify_breakpoint_hook
)
7635 deprecated_modify_breakpoint_hook (bpt
);
7636 breakpoint_modify_event (bpt
->number
);
7640 enable_breakpoint (struct breakpoint
*bpt
)
7642 do_enable_breakpoint (bpt
, bpt
->disposition
);
7645 /* The enable command enables the specified breakpoints (or all defined
7646 breakpoints) so they once again become (or continue to be) effective
7647 in stopping the inferior. */
7650 enable_command (char *args
, int from_tty
)
7652 struct breakpoint
*bpt
;
7654 ALL_BREAKPOINTS (bpt
)
7658 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
7663 case bp_catch_unload
:
7665 case bp_catch_vfork
:
7667 case bp_catch_catch
:
7668 case bp_catch_throw
:
7669 case bp_hardware_breakpoint
:
7671 case bp_hardware_watchpoint
:
7672 case bp_read_watchpoint
:
7673 case bp_access_watchpoint
:
7674 enable_breakpoint (bpt
);
7679 map_breakpoint_numbers (args
, enable_breakpoint
);
7683 enable_once_breakpoint (struct breakpoint
*bpt
)
7685 do_enable_breakpoint (bpt
, disp_disable
);
7689 enable_once_command (char *args
, int from_tty
)
7691 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7695 enable_delete_breakpoint (struct breakpoint
*bpt
)
7697 do_enable_breakpoint (bpt
, disp_del
);
7701 enable_delete_command (char *args
, int from_tty
)
7703 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7707 set_breakpoint_cmd (char *args
, int from_tty
)
7712 show_breakpoint_cmd (char *args
, int from_tty
)
7716 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7718 struct symtabs_and_lines
7719 decode_line_spec_1 (char *string
, int funfirstline
)
7721 struct symtabs_and_lines sals
;
7723 error (_("Empty line specification."));
7724 if (default_breakpoint_valid
)
7725 sals
= decode_line_1 (&string
, funfirstline
,
7726 default_breakpoint_symtab
,
7727 default_breakpoint_line
,
7728 (char ***) NULL
, NULL
);
7730 sals
= decode_line_1 (&string
, funfirstline
,
7731 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7733 error (_("Junk at end of line specification: %s"), string
);
7737 /* Create and insert a raw software breakpoint at PC. Return an
7738 identifier, which should be used to remove the breakpoint later.
7739 In general, places which call this should be using something on the
7740 breakpoint chain instead; this function should be eliminated
7744 deprecated_insert_raw_breakpoint (CORE_ADDR pc
)
7746 struct bp_target_info
*bp_tgt
;
7748 bp_tgt
= xmalloc (sizeof (struct bp_target_info
));
7749 memset (bp_tgt
, 0, sizeof (struct bp_target_info
));
7751 bp_tgt
->placed_address
= pc
;
7752 if (target_insert_breakpoint (bp_tgt
) != 0)
7754 /* Could not insert the breakpoint. */
7762 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
7765 deprecated_remove_raw_breakpoint (void *bp
)
7767 struct bp_target_info
*bp_tgt
= bp
;
7770 ret
= target_remove_breakpoint (bp_tgt
);
7776 /* One (or perhaps two) breakpoints used for software single stepping. */
7778 static void *single_step_breakpoints
[2];
7780 /* Create and insert a breakpoint for software single step. */
7783 insert_single_step_breakpoint (CORE_ADDR next_pc
)
7787 if (single_step_breakpoints
[0] == NULL
)
7788 bpt_p
= &single_step_breakpoints
[0];
7791 gdb_assert (single_step_breakpoints
[1] == NULL
);
7792 bpt_p
= &single_step_breakpoints
[1];
7795 /* NOTE drow/2006-04-11: A future improvement to this function would be
7796 to only create the breakpoints once, and actually put them on the
7797 breakpoint chain. That would let us use set_raw_breakpoint. We could
7798 adjust the addresses each time they were needed. Doing this requires
7799 corresponding changes elsewhere where single step breakpoints are
7800 handled, however. So, for now, we use this. */
7802 *bpt_p
= deprecated_insert_raw_breakpoint (next_pc
);
7804 error (_("Could not insert single-step breakpoint at 0x%s"),
7805 paddr_nz (next_pc
));
7808 /* Remove and delete any breakpoints used for software single step. */
7811 remove_single_step_breakpoints (void)
7813 gdb_assert (single_step_breakpoints
[0] != NULL
);
7815 /* See insert_single_step_breakpoint for more about this deprecated
7817 deprecated_remove_raw_breakpoint (single_step_breakpoints
[0]);
7818 single_step_breakpoints
[0] = NULL
;
7820 if (single_step_breakpoints
[1] != NULL
)
7822 deprecated_remove_raw_breakpoint (single_step_breakpoints
[1]);
7823 single_step_breakpoints
[1] = NULL
;
7828 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
7829 It is defined as a macro to prevent duplication.
7830 COMMAND should be a string constant containing the name of the command. */
7831 #define BREAK_ARGS_HELP(command) \
7832 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
7833 LOCATION may be a line number, function name, or \"*\" and an address.\n\
7834 If a line number is specified, break at start of code for that line.\n\
7835 If a function is specified, break at start of code for that function.\n\
7836 If an address is specified, break at that exact address.\n\
7837 With no LOCATION, uses current execution address of selected stack frame.\n\
7838 This is useful for breaking on return to a stack frame.\n\
7840 THREADNUM is the number from \"info threads\".\n\
7841 CONDITION is a boolean expression.\n\
7843 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7845 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
7848 _initialize_breakpoint (void)
7850 static struct cmd_list_element
*breakpoint_set_cmdlist
;
7851 static struct cmd_list_element
*breakpoint_show_cmdlist
;
7852 struct cmd_list_element
*c
;
7854 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
7856 breakpoint_chain
= 0;
7857 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7858 before a breakpoint is set. */
7859 breakpoint_count
= 0;
7861 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
7862 Set ignore-count of breakpoint number N to COUNT.\n\
7863 Usage is `ignore N COUNT'."));
7865 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7867 add_com ("commands", class_breakpoint
, commands_command
, _("\
7868 Set commands to be executed when a breakpoint is hit.\n\
7869 Give breakpoint number as argument after \"commands\".\n\
7870 With no argument, the targeted breakpoint is the last one set.\n\
7871 The commands themselves follow starting on the next line.\n\
7872 Type a line containing \"end\" to indicate the end of them.\n\
7873 Give \"silent\" as the first line to make the breakpoint silent;\n\
7874 then no output is printed when it is hit, except what the commands print."));
7876 add_com ("condition", class_breakpoint
, condition_command
, _("\
7877 Specify breakpoint number N to break only if COND is true.\n\
7878 Usage is `condition N COND', where N is an integer and COND is an\n\
7879 expression to be evaluated whenever breakpoint N is reached."));
7881 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
7882 Set a temporary breakpoint.\n\
7883 Like \"break\" except the breakpoint is only temporary,\n\
7884 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7885 by using \"enable delete\" on the breakpoint number.\n\
7887 BREAK_ARGS_HELP ("tbreak")));
7888 set_cmd_completer (c
, location_completer
);
7890 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
7891 Set a hardware assisted breakpoint.\n\
7892 Like \"break\" except the breakpoint requires hardware support,\n\
7893 some target hardware may not have this support.\n\
7895 BREAK_ARGS_HELP ("hbreak")));
7896 set_cmd_completer (c
, location_completer
);
7898 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
7899 Set a temporary hardware assisted breakpoint.\n\
7900 Like \"hbreak\" except the breakpoint is only temporary,\n\
7901 so it will be deleted when hit.\n\
7903 BREAK_ARGS_HELP ("thbreak")));
7904 set_cmd_completer (c
, location_completer
);
7906 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
7907 Enable some breakpoints.\n\
7908 Give breakpoint numbers (separated by spaces) as arguments.\n\
7909 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7910 This is used to cancel the effect of the \"disable\" command.\n\
7911 With a subcommand you can enable temporarily."),
7912 &enablelist
, "enable ", 1, &cmdlist
);
7914 add_com ("ab", class_breakpoint
, enable_command
, _("\
7915 Enable some breakpoints.\n\
7916 Give breakpoint numbers (separated by spaces) as arguments.\n\
7917 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7918 This is used to cancel the effect of the \"disable\" command.\n\
7919 With a subcommand you can enable temporarily."));
7921 add_com_alias ("en", "enable", class_breakpoint
, 1);
7923 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
7924 Enable some breakpoints.\n\
7925 Give breakpoint numbers (separated by spaces) as arguments.\n\
7926 This is used to cancel the effect of the \"disable\" command.\n\
7927 May be abbreviated to simply \"enable\".\n"),
7928 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7930 add_cmd ("once", no_class
, enable_once_command
, _("\
7931 Enable breakpoints for one hit. Give breakpoint numbers.\n\
7932 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
7935 add_cmd ("delete", no_class
, enable_delete_command
, _("\
7936 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7937 If a breakpoint is hit while enabled in this fashion, it is deleted."),
7940 add_cmd ("delete", no_class
, enable_delete_command
, _("\
7941 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7942 If a breakpoint is hit while enabled in this fashion, it is deleted."),
7945 add_cmd ("once", no_class
, enable_once_command
, _("\
7946 Enable breakpoints for one hit. Give breakpoint numbers.\n\
7947 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
7950 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
7951 Disable some breakpoints.\n\
7952 Arguments are breakpoint numbers with spaces in between.\n\
7953 To disable all breakpoints, give no argument.\n\
7954 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
7955 &disablelist
, "disable ", 1, &cmdlist
);
7956 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7957 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7959 add_com ("sb", class_breakpoint
, disable_command
, _("\
7960 Disable some breakpoints.\n\
7961 Arguments are breakpoint numbers with spaces in between.\n\
7962 To disable all breakpoints, give no argument.\n\
7963 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
7965 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
7966 Disable some breakpoints.\n\
7967 Arguments are breakpoint numbers with spaces in between.\n\
7968 To disable all breakpoints, give no argument.\n\
7969 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7970 This command may be abbreviated \"disable\"."),
7973 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
7974 Delete some breakpoints or auto-display expressions.\n\
7975 Arguments are breakpoint numbers with spaces in between.\n\
7976 To delete all breakpoints, give no argument.\n\
7978 Also a prefix command for deletion of other GDB objects.\n\
7979 The \"unset\" command is also an alias for \"delete\"."),
7980 &deletelist
, "delete ", 1, &cmdlist
);
7981 add_com_alias ("d", "delete", class_breakpoint
, 1);
7982 add_com_alias ("del", "delete", class_breakpoint
, 1);
7984 add_com ("db", class_breakpoint
, delete_command
, _("\
7985 Delete some breakpoints.\n\
7986 Arguments are breakpoint numbers with spaces in between.\n\
7987 To delete all breakpoints, give no argument.\n"));
7989 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
7990 Delete some breakpoints or auto-display expressions.\n\
7991 Arguments are breakpoint numbers with spaces in between.\n\
7992 To delete all breakpoints, give no argument.\n\
7993 This command may be abbreviated \"delete\"."),
7996 add_com ("clear", class_breakpoint
, clear_command
, _("\
7997 Clear breakpoint at specified line or function.\n\
7998 Argument may be line number, function name, or \"*\" and an address.\n\
7999 If line number is specified, all breakpoints in that line are cleared.\n\
8000 If function is specified, breakpoints at beginning of function are cleared.\n\
8001 If an address is specified, breakpoints at that address are cleared.\n\
8003 With no argument, clears all breakpoints in the line that the selected frame\n\
8006 See also the \"delete\" command which clears breakpoints by number."));
8008 c
= add_com ("break", class_breakpoint
, break_command
, _("\
8009 Set breakpoint at specified line or function.\n"
8010 BREAK_ARGS_HELP ("break")));
8011 set_cmd_completer (c
, location_completer
);
8013 add_com_alias ("b", "break", class_run
, 1);
8014 add_com_alias ("br", "break", class_run
, 1);
8015 add_com_alias ("bre", "break", class_run
, 1);
8016 add_com_alias ("brea", "break", class_run
, 1);
8020 add_com_alias ("ba", "break", class_breakpoint
, 1);
8021 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
8026 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
8027 Break in function/address or break at a line in the current file."),
8028 &stoplist
, "stop ", 1, &cmdlist
);
8029 add_cmd ("in", class_breakpoint
, stopin_command
,
8030 _("Break in function or address."), &stoplist
);
8031 add_cmd ("at", class_breakpoint
, stopat_command
,
8032 _("Break at a line in the current file."), &stoplist
);
8033 add_com ("status", class_info
, breakpoints_info
, _("\
8034 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8035 The \"Type\" column indicates one of:\n\
8036 \tbreakpoint - normal breakpoint\n\
8037 \twatchpoint - watchpoint\n\
8038 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8039 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8040 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8041 address and file/line number respectively.\n\
8043 Convenience variable \"$_\" and default examine address for \"x\"\n\
8044 are set to the address of the last breakpoint listed.\n\n\
8045 Convenience variable \"$bpnum\" contains the number of the last\n\
8049 add_info ("breakpoints", breakpoints_info
, _("\
8050 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8051 The \"Type\" column indicates one of:\n\
8052 \tbreakpoint - normal breakpoint\n\
8053 \twatchpoint - watchpoint\n\
8054 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8055 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8056 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8057 address and file/line number respectively.\n\
8059 Convenience variable \"$_\" and default examine address for \"x\"\n\
8060 are set to the address of the last breakpoint listed.\n\n\
8061 Convenience variable \"$bpnum\" contains the number of the last\n\
8065 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
8066 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8067 The \"Type\" column indicates one of:\n\
8068 \tbreakpoint - normal breakpoint\n\
8069 \twatchpoint - watchpoint\n\
8070 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8071 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8072 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8073 address and file/line number respectively.\n\
8075 Convenience variable \"$_\" and default examine address for \"x\"\n\
8076 are set to the address of the last breakpoint listed.\n\n\
8077 Convenience variable \"$bpnum\" contains the number of the last\n\
8080 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
8081 Status of all breakpoints, or breakpoint number NUMBER.\n\
8082 The \"Type\" column indicates one of:\n\
8083 \tbreakpoint - normal breakpoint\n\
8084 \twatchpoint - watchpoint\n\
8085 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8086 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8087 \tuntil - internal breakpoint used by the \"until\" command\n\
8088 \tfinish - internal breakpoint used by the \"finish\" command\n\
8089 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8090 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8091 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8092 address and file/line number respectively.\n\
8094 Convenience variable \"$_\" and default examine address for \"x\"\n\
8095 are set to the address of the last breakpoint listed.\n\
8097 Convenience variable \"$bpnum\" contains the number of the last\n\
8099 &maintenanceinfolist
);
8101 add_com ("catch", class_breakpoint
, catch_command
, _("\
8102 Set catchpoints to catch events.\n\
8103 Raised signals may be caught:\n\
8104 \tcatch signal - all signals\n\
8105 \tcatch signal <signame> - a particular signal\n\
8106 Raised exceptions may be caught:\n\
8107 \tcatch throw - all exceptions, when thrown\n\
8108 \tcatch throw <exceptname> - a particular exception, when thrown\n\
8109 \tcatch catch - all exceptions, when caught\n\
8110 \tcatch catch <exceptname> - a particular exception, when caught\n\
8111 Thread or process events may be caught:\n\
8112 \tcatch thread_start - any threads, just after creation\n\
8113 \tcatch thread_exit - any threads, just before expiration\n\
8114 \tcatch thread_join - any threads, just after joins\n\
8115 Process events may be caught:\n\
8116 \tcatch start - any processes, just after creation\n\
8117 \tcatch exit - any processes, just before expiration\n\
8118 \tcatch fork - calls to fork()\n\
8119 \tcatch vfork - calls to vfork()\n\
8120 \tcatch exec - calls to exec()\n\
8121 Dynamically-linked library events may be caught:\n\
8122 \tcatch load - loads of any library\n\
8123 \tcatch load <libname> - loads of a particular library\n\
8124 \tcatch unload - unloads of any library\n\
8125 \tcatch unload <libname> - unloads of a particular library\n\
8126 The act of your program's execution stopping may also be caught:\n\
8128 C++ exceptions may be caught:\n\
8129 \tcatch throw - all exceptions, when thrown\n\
8130 \tcatch catch - all exceptions, when caught\n\
8132 Do \"help set follow-fork-mode\" for info on debugging your program\n\
8133 after a fork or vfork is caught.\n\n\
8134 Do \"help breakpoints\" for info on other commands dealing with breakpoints."));
8136 add_com ("tcatch", class_breakpoint
, tcatch_command
, _("\
8137 Set temporary catchpoints to catch events.\n\
8138 Args like \"catch\" command.\n\
8139 Like \"catch\" except the catchpoint is only temporary,\n\
8140 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
8141 by using \"enable delete\" on the catchpoint number."));
8143 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
8144 Set a watchpoint for an expression.\n\
8145 A watchpoint stops execution of your program whenever the value of\n\
8146 an expression changes."));
8147 set_cmd_completer (c
, location_completer
);
8149 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
8150 Set a read watchpoint for an expression.\n\
8151 A watchpoint stops execution of your program whenever the value of\n\
8152 an expression is read."));
8153 set_cmd_completer (c
, location_completer
);
8155 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
8156 Set a watchpoint for an expression.\n\
8157 A watchpoint stops execution of your program whenever the value of\n\
8158 an expression is either read or written."));
8159 set_cmd_completer (c
, location_completer
);
8161 add_info ("watchpoints", breakpoints_info
,
8162 _("Synonym for ``info breakpoints''."));
8165 /* XXX: cagney/2005-02-23: This should be a boolean, and should
8166 respond to changes - contrary to the description. */
8167 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
8168 &can_use_hw_watchpoints
, _("\
8169 Set debugger's willingness to use watchpoint hardware."), _("\
8170 Show debugger's willingness to use watchpoint hardware."), _("\
8171 If zero, gdb will not use hardware for new watchpoints, even if\n\
8172 such is available. (However, any hardware watchpoints that were\n\
8173 created before setting this to nonzero, will continue to use watchpoint\n\
8176 show_can_use_hw_watchpoints
,
8177 &setlist
, &showlist
);
8179 can_use_hw_watchpoints
= 1;
8181 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
8182 Breakpoint specific settings\n\
8183 Configure various breakpoint-specific variables such as\n\
8184 pending breakpoint behavior"),
8185 &breakpoint_set_cmdlist
, "set breakpoint ",
8186 0/*allow-unknown*/, &setlist
);
8187 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
8188 Breakpoint specific settings\n\
8189 Configure various breakpoint-specific variables such as\n\
8190 pending breakpoint behavior"),
8191 &breakpoint_show_cmdlist
, "show breakpoint ",
8192 0/*allow-unknown*/, &showlist
);
8194 add_setshow_auto_boolean_cmd ("pending", no_class
,
8195 &pending_break_support
, _("\
8196 Set debugger's behavior regarding pending breakpoints."), _("\
8197 Show debugger's behavior regarding pending breakpoints."), _("\
8198 If on, an unrecognized breakpoint location will cause gdb to create a\n\
8199 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
8200 an error. If auto, an unrecognized breakpoint location results in a\n\
8201 user-query to see if a pending breakpoint should be created."),
8203 show_pending_break_support
,
8204 &breakpoint_set_cmdlist
,
8205 &breakpoint_show_cmdlist
);
8207 pending_break_support
= AUTO_BOOLEAN_AUTO
;
8209 add_setshow_boolean_cmd ("auto-hw", no_class
,
8210 &automatic_hardware_breakpoints
, _("\
8211 Set automatic usage of hardware breakpoints."), _("\
8212 Show automatic usage of hardware breakpoints."), _("\
8213 If set, the debugger will automatically use hardware breakpoints for\n\
8214 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
8215 a warning will be emitted for such breakpoints."),
8217 show_automatic_hardware_breakpoints
,
8218 &breakpoint_set_cmdlist
,
8219 &breakpoint_show_cmdlist
);
8221 automatic_hardware_breakpoints
= 1;