1 /* Everything about breakpoints, for GDB.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
28 #include "breakpoint.h"
30 #include "expression.h"
36 #include "gdbthread.h"
39 #include "gdb_string.h"
46 #include "completer.h"
49 #include "cli/cli-script.h"
50 #include "gdb_assert.h"
53 #include "gdb-events.h"
55 /* Prototypes for local functions. */
57 static void until_break_command_continuation (struct continuation_arg
*arg
);
59 static void catch_command_1 (char *, int, int);
61 static void enable_delete_command (char *, int);
63 static void enable_delete_breakpoint (struct breakpoint
*);
65 static void enable_once_command (char *, int);
67 static void enable_once_breakpoint (struct breakpoint
*);
69 static void disable_command (char *, int);
71 static void enable_command (char *, int);
73 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
75 static void ignore_command (char *, int);
77 static int breakpoint_re_set_one (void *);
79 static void clear_command (char *, int);
81 static void catch_command (char *, int);
83 static void watch_command (char *, int);
85 static int can_use_hardware_watchpoint (struct value
*);
87 extern void break_at_finish_command (char *, int);
88 extern void break_at_finish_at_depth_command (char *, int);
90 extern void tbreak_at_finish_command (char *, int);
92 static void break_command_1 (char *, int, int);
94 static void mention (struct breakpoint
*);
96 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
98 static void check_duplicates (struct breakpoint
*);
100 static void describe_other_breakpoints (CORE_ADDR
, asection
*);
102 static void breakpoints_info (char *, int);
104 static void breakpoint_1 (int, int);
106 static bpstat
bpstat_alloc (struct breakpoint
*, bpstat
);
108 static int breakpoint_cond_eval (void *);
110 static void cleanup_executing_breakpoints (void *);
112 static void commands_command (char *, int);
114 static void condition_command (char *, int);
116 static int get_number_trailer (char **, int);
118 void set_breakpoint_count (int);
127 static int remove_breakpoint (struct breakpoint
*, insertion_state_t
);
129 static enum print_stop_action
print_it_typical (bpstat
);
131 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
135 enum exception_event_kind kind
;
138 args_for_catchpoint_enable
;
140 static int watchpoint_check (void *);
142 static int cover_target_enable_exception_callback (void *);
144 static void maintenance_info_breakpoints (char *, int);
146 static void create_longjmp_breakpoint (char *);
148 static void create_overlay_event_breakpoint (char *);
150 static int hw_breakpoint_used_count (void);
152 static int hw_watchpoint_used_count (enum bptype
, int *);
154 static void hbreak_command (char *, int);
156 static void thbreak_command (char *, int);
158 static void watch_command_1 (char *, int, int);
160 static void rwatch_command (char *, int);
162 static void awatch_command (char *, int);
164 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
166 static void solib_load_unload_1 (char *hookname
,
169 char *cond_string
, enum bptype bp_kind
);
171 static void create_fork_vfork_event_catchpoint (int tempflag
,
173 enum bptype bp_kind
);
175 static void break_at_finish_at_depth_command_1 (char *arg
,
176 int flag
, int from_tty
);
178 static void break_at_finish_command_1 (char *arg
, int flag
, int from_tty
);
180 static void stop_command (char *arg
, int from_tty
);
182 static void stopin_command (char *arg
, int from_tty
);
184 static void stopat_command (char *arg
, int from_tty
);
186 static char *ep_find_event_name_end (char *arg
);
188 static char *ep_parse_optional_if_clause (char **arg
);
190 static char *ep_parse_optional_filename (char **arg
);
192 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
193 static void catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
);
196 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
197 enum exception_event_kind ex_event
,
198 struct symtab_and_line
*sal
);
200 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
201 char *arg
, int tempflag
, int from_tty
);
203 static void tcatch_command (char *arg
, int from_tty
);
205 static void ep_skip_leading_whitespace (char **s
);
207 /* Prototypes for exported functions. */
209 /* If FALSE, gdb will not use hardware support for watchpoints, even
210 if such is available. */
211 static int can_use_hw_watchpoints
;
213 void _initialize_breakpoint (void);
215 extern int addressprint
; /* Print machine addresses? */
217 /* Are we executing breakpoint commands? */
218 static int executing_breakpoint_commands
;
220 /* Are overlay event breakpoints enabled? */
221 static int overlay_events_enabled
;
223 /* Walk the following statement or block through all breakpoints.
224 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
227 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
229 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
230 for (B = breakpoint_chain; \
231 B ? (TMP=B->next, 1): 0; \
234 /* True if SHIFT_INST_REGS defined, false otherwise. */
236 int must_shift_inst_regs
=
237 #if defined(SHIFT_INST_REGS)
244 /* True if breakpoint hit counts should be displayed in breakpoint info. */
246 int show_breakpoint_hit_counts
= 1;
248 /* Chain of all breakpoints defined. */
250 struct breakpoint
*breakpoint_chain
;
252 /* Number of last breakpoint made. */
254 int breakpoint_count
;
256 /* Pointer to current exception event record */
257 static struct exception_event_record
*current_exception_event
;
259 /* Indicator of whether exception catchpoints should be nuked
260 between runs of a program */
261 int exception_catchpoints_are_fragile
= 0;
263 /* Indicator of when exception catchpoints set-up should be
264 reinitialized -- e.g. when program is re-run */
265 int exception_support_initialized
= 0;
267 /* This function returns a pointer to the string representation of the
268 pathname of the dynamically-linked library that has just been
271 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
272 or undefined results are guaranteed.
274 This string's contents are only valid immediately after the
275 inferior has stopped in the dynamic linker hook, and becomes
276 invalid as soon as the inferior is continued. Clients should make
277 a copy of this string if they wish to continue the inferior and
278 then access the string. */
280 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
281 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
284 /* This function returns a pointer to the string representation of the
285 pathname of the dynamically-linked library that has just been
288 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
289 TRUE, or undefined results are guaranteed.
291 This string's contents are only valid immediately after the
292 inferior has stopped in the dynamic linker hook, and becomes
293 invalid as soon as the inferior is continued. Clients should make
294 a copy of this string if they wish to continue the inferior and
295 then access the string. */
297 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
298 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
301 /* This function is called by the "catch load" command. It allows the
302 debugger to be notified by the dynamic linker when a specified
303 library file (or any library file, if filename is NULL) is loaded. */
305 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
306 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
307 error ("catch of library loads not yet implemented on this platform")
310 /* This function is called by the "catch unload" command. It allows
311 the debugger to be notified by the dynamic linker when a specified
312 library file (or any library file, if filename is NULL) is
315 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
316 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
317 error ("catch of library unloads not yet implemented on this platform")
320 /* Set breakpoint count to NUM. */
323 set_breakpoint_count (int num
)
325 breakpoint_count
= num
;
326 set_internalvar (lookup_internalvar ("bpnum"),
327 value_from_longest (builtin_type_int
, (LONGEST
) num
));
330 /* Used in run_command to zero the hit count when a new run starts. */
333 clear_breakpoint_hit_counts (void)
335 struct breakpoint
*b
;
341 /* Default address, symtab and line to put a breakpoint at
342 for "break" command with no arg.
343 if default_breakpoint_valid is zero, the other three are
344 not valid, and "break" with no arg is an error.
346 This set by print_stack_frame, which calls set_default_breakpoint. */
348 int default_breakpoint_valid
;
349 CORE_ADDR default_breakpoint_address
;
350 struct symtab
*default_breakpoint_symtab
;
351 int default_breakpoint_line
;
353 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
354 Advance *PP after the string and any trailing whitespace.
356 Currently the string can either be a number or "$" followed by the name
357 of a convenience variable. Making it an expression wouldn't work well
358 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
360 TRAILER is a character which can be found after the number; most
361 commonly this is `-'. If you don't want a trailer, use \0. */
363 get_number_trailer (char **pp
, int trailer
)
365 int retval
= 0; /* default */
369 /* Empty line means refer to the last breakpoint. */
370 return breakpoint_count
;
373 /* Make a copy of the name, so we can null-terminate it
374 to pass to lookup_internalvar(). */
379 while (isalnum (*p
) || *p
== '_')
381 varname
= (char *) alloca (p
- start
+ 1);
382 strncpy (varname
, start
, p
- start
);
383 varname
[p
- start
] = '\0';
384 val
= value_of_internalvar (lookup_internalvar (varname
));
385 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_INT
)
386 retval
= (int) value_as_long (val
);
389 printf_filtered ("Convenience variable must have integer value.\n");
397 while (*p
>= '0' && *p
<= '9')
400 /* There is no number here. (e.g. "cond a == b"). */
402 /* Skip non-numeric token */
403 while (*p
&& !isspace((int) *p
))
405 /* Return zero, which caller must interpret as error. */
411 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
413 /* Trailing junk: return 0 and let caller print error msg. */
414 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
425 /* Like get_number_trailer, but don't allow a trailer. */
427 get_number (char **pp
)
429 return get_number_trailer (pp
, '\0');
432 /* Parse a number or a range.
433 * A number will be of the form handled by get_number.
434 * A range will be of the form <number1> - <number2>, and
435 * will represent all the integers between number1 and number2,
438 * While processing a range, this fuction is called iteratively;
439 * At each call it will return the next value in the range.
441 * At the beginning of parsing a range, the char pointer PP will
442 * be advanced past <number1> and left pointing at the '-' token.
443 * Subsequent calls will not advance the pointer until the range
444 * is completed. The call that completes the range will advance
445 * pointer PP past <number2>.
449 get_number_or_range (char **pp
)
451 static int last_retval
, end_value
;
452 static char *end_ptr
;
453 static int in_range
= 0;
457 /* Default case: pp is pointing either to a solo number,
458 or to the first number of a range. */
459 last_retval
= get_number_trailer (pp
, '-');
464 /* This is the start of a range (<number1> - <number2>).
465 Skip the '-', parse and remember the second number,
466 and also remember the end of the final token. */
470 while (isspace ((int) *end_ptr
))
471 end_ptr
++; /* skip white space */
472 end_value
= get_number (temp
);
473 if (end_value
< last_retval
)
475 error ("inverted range");
477 else if (end_value
== last_retval
)
479 /* degenerate range (number1 == number2). Advance the
480 token pointer so that the range will be treated as a
489 error ("negative value");
492 /* pp points to the '-' that betokens a range. All
493 number-parsing has already been done. Return the next
494 integer value (one greater than the saved previous value).
495 Do not advance the token pointer 'pp' until the end of range
498 if (++last_retval
== end_value
)
500 /* End of range reached; advance token pointer. */
510 /* condition N EXP -- set break condition of breakpoint N to EXP. */
513 condition_command (char *arg
, int from_tty
)
515 register struct breakpoint
*b
;
520 error_no_arg ("breakpoint number");
523 bnum
= get_number (&p
);
525 error ("Bad breakpoint argument: '%s'", arg
);
528 if (b
->number
== bnum
)
535 if (b
->cond_string
!= NULL
)
536 xfree (b
->cond_string
);
541 b
->cond_string
= NULL
;
543 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
548 /* I don't know if it matters whether this is the string the user
549 typed in or the decompiled expression. */
550 b
->cond_string
= savestring (arg
, strlen (arg
));
551 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->address
), 0);
553 error ("Junk at end of expression");
555 breakpoints_changed ();
556 breakpoint_modify_event (b
->number
);
560 error ("No breakpoint number %d.", bnum
);
565 commands_command (char *arg
, int from_tty
)
567 register struct breakpoint
*b
;
570 struct command_line
*l
;
572 /* If we allowed this, we would have problems with when to
573 free the storage, if we change the commands currently
576 if (executing_breakpoint_commands
)
577 error ("Can't use the \"commands\" command among a breakpoint's commands.");
580 bnum
= get_number (&p
);
583 error ("Unexpected extra arguments following breakpoint number.");
586 if (b
->number
== bnum
)
590 "Type commands for when breakpoint %d is hit, one per line.",
592 l
= read_command_lines (tmpbuf
, from_tty
);
593 free_command_lines (&b
->commands
);
595 breakpoints_changed ();
596 breakpoint_modify_event (b
->number
);
599 error ("No breakpoint number %d.", bnum
);
602 /* Like target_read_memory() but if breakpoints are inserted, return
603 the shadow contents instead of the breakpoints themselves.
605 Read "memory data" from whatever target or inferior we have.
606 Returns zero if successful, errno value if not. EIO is used
607 for address out of bounds. If breakpoints are inserted, returns
608 shadow contents, not the breakpoints themselves. From breakpoint.c. */
611 read_memory_nobpt (CORE_ADDR memaddr
, char *myaddr
, unsigned len
)
614 struct breakpoint
*b
;
615 CORE_ADDR bp_addr
= 0;
618 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
619 /* No breakpoints on this machine. */
620 return target_read_memory (memaddr
, myaddr
, len
);
624 if (b
->type
== bp_none
)
625 warning ("reading through apparently deleted breakpoint #%d?",
628 /* memory breakpoint? */
629 if (b
->type
== bp_watchpoint
630 || b
->type
== bp_hardware_watchpoint
631 || b
->type
== bp_read_watchpoint
632 || b
->type
== bp_access_watchpoint
)
637 /* Addresses and length of the part of the breakpoint that
639 /* XXXX The m68k, sh and h8300 have different local and remote
640 breakpoint values. BREAKPOINT_FROM_PC still manages to
641 correctly determine the breakpoints memory address and size
642 for these targets. */
643 bp_addr
= b
->address
;
645 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
650 if (bp_addr
+ bp_size
<= memaddr
)
651 /* The breakpoint is entirely before the chunk of memory we
654 if (bp_addr
>= memaddr
+ len
)
655 /* The breakpoint is entirely after the chunk of memory we are
658 /* Copy the breakpoint from the shadow contents, and recurse for
659 the things before and after. */
661 /* Offset within shadow_contents. */
664 if (bp_addr
< memaddr
)
666 /* Only copy the second part of the breakpoint. */
667 bp_size
-= memaddr
- bp_addr
;
668 bptoffset
= memaddr
- bp_addr
;
672 if (bp_addr
+ bp_size
> memaddr
+ len
)
674 /* Only copy the first part of the breakpoint. */
675 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
678 memcpy (myaddr
+ bp_addr
- memaddr
,
679 b
->shadow_contents
+ bptoffset
, bp_size
);
681 if (bp_addr
> memaddr
)
683 /* Copy the section of memory before the breakpoint. */
684 status
= read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
689 if (bp_addr
+ bp_size
< memaddr
+ len
)
691 /* Copy the section of memory after the breakpoint. */
692 status
= read_memory_nobpt (bp_addr
+ bp_size
,
693 myaddr
+ bp_addr
+ bp_size
- memaddr
,
694 memaddr
+ len
- (bp_addr
+ bp_size
));
701 /* Nothing overlaps. Just call read_memory_noerr. */
702 return target_read_memory (memaddr
, myaddr
, len
);
706 /* insert_breakpoints is used when starting or continuing the program.
707 remove_breakpoints is used when the program stops.
708 Both return zero if successful,
709 or an `errno' value if could not write the inferior. */
712 insert_breakpoints (void)
714 register struct breakpoint
*b
, *temp
;
715 int return_val
= 0; /* return success code. */
717 int disabled_breaks
= 0;
718 int hw_breakpoint_error
= 0;
719 #ifdef ONE_PROCESS_WRITETEXT
720 int process_warning
= 0;
723 static char message1
[] = "Error inserting catchpoint %d:\n";
724 static char message
[sizeof (message1
) + 30];
726 struct ui_file
*tmp_error_stream
= mem_fileopen ();
727 make_cleanup_ui_file_delete (tmp_error_stream
);
729 /* Explicitly mark the warning -- this will only be printed if
730 there was an error. */
731 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
733 ALL_BREAKPOINTS_SAFE (b
, temp
)
735 /* Permanent breakpoints cannot be inserted or removed. Disabled
736 breakpoints should not be inserted. */
737 if (b
->enable_state
!= bp_enabled
)
740 if ((b
->type
== bp_watchpoint
741 || b
->type
== bp_hardware_watchpoint
742 || b
->type
== bp_read_watchpoint
743 || b
->type
== bp_access_watchpoint
) && (!b
->val
))
746 val
= evaluate_expression (b
->exp
);
748 if (VALUE_LAZY (val
))
749 value_fetch_lazy (val
);
752 if (b
->type
!= bp_watchpoint
753 && b
->type
!= bp_hardware_watchpoint
754 && b
->type
!= bp_read_watchpoint
755 && b
->type
!= bp_access_watchpoint
756 && b
->type
!= bp_catch_fork
757 && b
->type
!= bp_catch_vfork
758 && b
->type
!= bp_catch_exec
759 && b
->type
!= bp_catch_throw
760 && b
->type
!= bp_catch_catch
764 /* "Normal" instruction breakpoint: either the standard
765 trap-instruction bp (bp_breakpoint), or a
766 bp_hardware_breakpoint. */
768 /* First check to see if we have to handle an overlay. */
769 if (overlay_debugging
== ovly_off
770 || b
->section
== NULL
771 || !(section_is_overlay (b
->section
)))
773 /* No overlay handling: just set the breakpoint. */
775 if (b
->type
== bp_hardware_breakpoint
)
776 val
= target_insert_hw_breakpoint (b
->address
,
779 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
783 /* This breakpoint is in an overlay section.
784 Shall we set a breakpoint at the LMA? */
785 if (!overlay_events_enabled
)
787 /* Yes -- overlay event support is not active,
788 so we must try to set a breakpoint at the LMA.
789 This will not work for a hardware breakpoint. */
790 if (b
->type
== bp_hardware_breakpoint
)
791 warning ("hardware breakpoint %d not supported in overlay!\n",
795 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
797 /* Set a software (trap) breakpoint at the LMA. */
798 val
= target_insert_breakpoint (addr
, b
->shadow_contents
);
800 fprintf_unfiltered (tmp_error_stream
,
801 "Overlay breakpoint %d failed: in ROM?",
805 /* Shall we set a breakpoint at the VMA? */
806 if (section_is_mapped (b
->section
))
808 /* Yes. This overlay section is mapped into memory. */
809 if (b
->type
== bp_hardware_breakpoint
)
810 val
= target_insert_hw_breakpoint (b
->address
,
813 val
= target_insert_breakpoint (b
->address
,
818 /* No. This breakpoint will not be inserted.
819 No error, but do not mark the bp as 'inserted'. */
826 /* Can't set the breakpoint. */
827 #if defined (DISABLE_UNSETTABLE_BREAK)
828 if (DISABLE_UNSETTABLE_BREAK (b
->address
))
830 /* See also: disable_breakpoints_in_shlibs. */
832 b
->enable_state
= bp_shlib_disabled
;
833 if (!disabled_breaks
)
835 fprintf_unfiltered (tmp_error_stream
,
836 "Cannot insert breakpoint %d.\n",
838 fprintf_unfiltered (tmp_error_stream
,
839 "Temporarily disabling shared library breakpoints:\n");
842 fprintf_unfiltered (tmp_error_stream
,
843 "breakpoint #%d\n", b
->number
);
848 #ifdef ONE_PROCESS_WRITETEXT
851 if (b
->type
== bp_hardware_breakpoint
)
853 hw_breakpoint_error
= 1;
854 fprintf_unfiltered (tmp_error_stream
,
855 "Cannot insert hardware breakpoint %d.\n",
860 fprintf_unfiltered (tmp_error_stream
,
861 "Cannot insert breakpoint %d.\n",
863 fprintf_filtered (tmp_error_stream
,
864 "Error accessing memory address ");
865 print_address_numeric (b
->address
, 1, tmp_error_stream
);
866 fprintf_filtered (tmp_error_stream
, ": %s.\n",
867 safe_strerror (val
));
876 return_val
= val
; /* remember failure */
878 else if (ep_is_exception_catchpoint (b
)
883 /* If we get here, we must have a callback mechanism for exception
884 events -- with g++ style embedded label support, we insert
885 ordinary breakpoints and not catchpoints. */
886 /* Format possible error message */
887 sprintf (message
, message1
, b
->number
);
889 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
892 /* Couldn't set breakpoint for some reason */
893 fprintf_unfiltered (tmp_error_stream
,
894 "Cannot insert catchpoint %d; disabling it.\n",
896 fprintf_filtered (tmp_error_stream
,
897 "Error accessing memory address ");
898 print_address_numeric (b
->address
, 1, tmp_error_stream
);
899 fprintf_filtered (tmp_error_stream
, ": %s.\n",
900 safe_strerror (val
));
901 b
->enable_state
= bp_disabled
;
905 /* Bp set, now make sure callbacks are enabled */
907 args_for_catchpoint_enable args
;
908 args
.kind
= b
->type
== bp_catch_catch
?
909 EX_EVENT_CATCH
: EX_EVENT_THROW
;
911 val
= catch_errors (cover_target_enable_exception_callback
,
913 message
, RETURN_MASK_ALL
);
914 if (val
!= 0 && val
!= -1)
918 /* Check if something went wrong; val == 0 can be ignored */
921 /* something went wrong */
922 fprintf_unfiltered (tmp_error_stream
,
923 "Cannot insert catchpoint %d; disabling it.\n",
925 b
->enable_state
= bp_disabled
;
930 return_val
= val
; /* remember failure */
933 else if ((b
->type
== bp_hardware_watchpoint
||
934 b
->type
== bp_read_watchpoint
||
935 b
->type
== bp_access_watchpoint
)
936 && b
->disposition
!= disp_del_at_next_stop
940 struct frame_info
*saved_frame
;
941 int saved_level
, within_current_scope
;
942 struct value
*mark
= value_mark ();
945 /* Save the current frame and level so we can restore it after
946 evaluating the watchpoint expression on its own frame. */
947 saved_frame
= deprecated_selected_frame
;
948 saved_level
= frame_relative_level (deprecated_selected_frame
);
950 /* Determine if the watchpoint is within scope. */
951 if (b
->exp_valid_block
== NULL
)
952 within_current_scope
= 1;
955 struct frame_info
*fi
;
956 fi
= frame_find_by_id (b
->watchpoint_frame
);
957 within_current_scope
= (fi
!= NULL
);
958 if (within_current_scope
)
962 if (within_current_scope
)
964 /* Evaluate the expression and cut the chain of values
965 produced off from the value chain.
967 Make sure the value returned isn't lazy; we use
968 laziness to determine what memory GDB actually needed
969 in order to compute the value of the expression. */
970 v
= evaluate_expression (b
->exp
);
972 value_release_to_mark (mark
);
977 /* Look at each value on the value chain. */
978 for (; v
; v
= v
->next
)
980 /* If it's a memory location, and GDB actually needed
981 its contents to evaluate the expression, then we
983 if (VALUE_LVAL (v
) == lval_memory
986 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
988 /* We only watch structs and arrays if user asked
989 for it explicitly, never if they just happen to
990 appear in the middle of some value chain. */
991 if (v
== b
->val_chain
992 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
993 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
998 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
999 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1001 if (b
->type
== bp_read_watchpoint
)
1003 else if (b
->type
== bp_access_watchpoint
)
1006 val
= target_insert_watchpoint (addr
, len
, type
);
1009 /* Don't exit the loop, try to insert
1010 every value on the value chain. That's
1011 because we will be removing all the
1012 watches below, and removing a
1013 watchpoint we didn't insert could have
1021 /* Failure to insert a watchpoint on any memory value in the
1022 value chain brings us here. */
1025 remove_breakpoint (b
, mark_uninserted
);
1026 hw_breakpoint_error
= 1;
1027 fprintf_unfiltered (tmp_error_stream
,
1028 "Could not insert hardware watchpoint %d.\n",
1035 printf_filtered ("Hardware watchpoint %d deleted ", b
->number
);
1036 printf_filtered ("because the program has left the block \n");
1037 printf_filtered ("in which its expression is valid.\n");
1038 if (b
->related_breakpoint
)
1039 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1040 b
->disposition
= disp_del_at_next_stop
;
1043 /* Restore the frame and level. */
1044 if ((saved_frame
!= deprecated_selected_frame
) ||
1045 (saved_level
!= frame_relative_level (deprecated_selected_frame
)))
1046 select_frame (saved_frame
);
1049 return_val
= val
; /* remember failure */
1051 else if ((b
->type
== bp_catch_fork
1052 || b
->type
== bp_catch_vfork
1053 || b
->type
== bp_catch_exec
)
1061 val
= target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
1063 case bp_catch_vfork
:
1064 val
= target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
1067 val
= target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
1070 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1075 fprintf_unfiltered (tmp_error_stream
,
1076 "Cannot insert catchpoint %d.", b
->number
);
1082 return_val
= val
; /* remember failure */
1088 /* If a hardware breakpoint or watchpoint was inserted, add a
1089 message about possibly exhausted resources. */
1090 if (hw_breakpoint_error
)
1092 fprintf_unfiltered (tmp_error_stream
,
1093 "Could not insert hardware breakpoints:\n\
1094 You may have requested too many hardware breakpoints/watchpoints.\n");
1096 #ifdef ONE_PROCESS_WRITETEXT
1097 if (process_warning
)
1098 fprintf_unfiltered (tmp_error_stream
,
1099 "The same program may be running in another process.");
1101 target_terminal_ours_for_output ();
1102 error_stream (tmp_error_stream
);
1108 remove_breakpoints (void)
1110 register struct breakpoint
*b
;
1117 val
= remove_breakpoint (b
, mark_uninserted
);
1126 remove_hw_watchpoints (void)
1128 register struct breakpoint
*b
;
1134 && (b
->type
== bp_hardware_watchpoint
1135 || b
->type
== bp_read_watchpoint
1136 || b
->type
== bp_access_watchpoint
))
1138 val
= remove_breakpoint (b
, mark_uninserted
);
1147 reattach_breakpoints (int pid
)
1149 register struct breakpoint
*b
;
1151 struct cleanup
*old_chain
= save_inferior_ptid ();
1153 /* Set inferior_ptid; remove_breakpoint uses this global. */
1154 inferior_ptid
= pid_to_ptid (pid
);
1159 remove_breakpoint (b
, mark_inserted
);
1160 if (b
->type
== bp_hardware_breakpoint
)
1161 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1163 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1166 do_cleanups (old_chain
);
1171 do_cleanups (old_chain
);
1176 update_breakpoints_after_exec (void)
1178 struct breakpoint
*b
;
1179 struct breakpoint
*temp
;
1181 /* Doing this first prevents the badness of having delete_breakpoint()
1182 write a breakpoint's current "shadow contents" to lift the bp. That
1183 shadow is NOT valid after an exec()! */
1184 mark_breakpoints_out ();
1186 ALL_BREAKPOINTS_SAFE (b
, temp
)
1188 /* Solib breakpoints must be explicitly reset after an exec(). */
1189 if (b
->type
== bp_shlib_event
)
1191 delete_breakpoint (b
);
1195 /* Thread event breakpoints must be set anew after an exec(),
1196 as must overlay event breakpoints. */
1197 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1199 delete_breakpoint (b
);
1203 /* Step-resume breakpoints are meaningless after an exec(). */
1204 if (b
->type
== bp_step_resume
)
1206 delete_breakpoint (b
);
1210 /* Ditto the sigtramp handler breakpoints. */
1211 if (b
->type
== bp_through_sigtramp
)
1213 delete_breakpoint (b
);
1217 /* Ditto the exception-handling catchpoints. */
1218 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1220 delete_breakpoint (b
);
1224 /* Don't delete an exec catchpoint, because else the inferior
1225 won't stop when it ought!
1227 Similarly, we probably ought to keep vfork catchpoints, 'cause
1228 on this target, we may not be able to stop when the vfork is
1229 seen, but only when the subsequent exec is seen. (And because
1230 deleting fork catchpoints here but not vfork catchpoints will
1231 seem mysterious to users, keep those too.)
1233 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1234 target address field, if any, is sufficient to have it be reset
1235 automagically. Certainly on HP-UX that's true.
1237 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1238 valid code address on some platforms (like the OBSOLETE mn10200
1239 and mn10300 simulators). We shouldn't assign any special
1240 interpretation to a breakpoint with a zero address. And in
1241 fact, GDB doesn't --- I can't see what that comment above is
1242 talking about. As far as I can tell, setting the address of a
1243 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1244 is meaningless, since those are implemented with HP-UX kernel
1245 hackery, not by storing breakpoint instructions somewhere. */
1246 if ((b
->type
== bp_catch_exec
) ||
1247 (b
->type
== bp_catch_vfork
) ||
1248 (b
->type
== bp_catch_fork
))
1250 b
->address
= (CORE_ADDR
) NULL
;
1254 /* bp_finish is a special case. The only way we ought to be able
1255 to see one of these when an exec() has happened, is if the user
1256 caught a vfork, and then said "finish". Ordinarily a finish just
1257 carries them to the call-site of the current callee, by setting
1258 a temporary bp there and resuming. But in this case, the finish
1259 will carry them entirely through the vfork & exec.
1261 We don't want to allow a bp_finish to remain inserted now. But
1262 we can't safely delete it, 'cause finish_command has a handle to
1263 the bp on a bpstat, and will later want to delete it. There's a
1264 chance (and I've seen it happen) that if we delete the bp_finish
1265 here, that its storage will get reused by the time finish_command
1266 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1267 We really must allow finish_command to delete a bp_finish.
1269 In the absense of a general solution for the "how do we know
1270 it's safe to delete something others may have handles to?"
1271 problem, what we'll do here is just uninsert the bp_finish, and
1272 let finish_command delete it.
1274 (We know the bp_finish is "doomed" in the sense that it's
1275 momentary, and will be deleted as soon as finish_command sees
1276 the inferior stopped. So it doesn't matter that the bp's
1277 address is probably bogus in the new a.out, unlike e.g., the
1278 solib breakpoints.) */
1280 if (b
->type
== bp_finish
)
1285 /* Without a symbolic address, we have little hope of the
1286 pre-exec() address meaning the same thing in the post-exec()
1288 if (b
->addr_string
== NULL
)
1290 delete_breakpoint (b
);
1294 /* If this breakpoint has survived the above battery of checks, then
1295 it must have a symbolic address. Be sure that it gets reevaluated
1296 to a target address, rather than reusing the old evaluation.
1298 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1299 for bp_catch_exec and friends, I'm pretty sure this is entirely
1300 unnecessary. A call to breakpoint_re_set_one always recomputes
1301 the breakpoint's address from scratch, or deletes it if it can't.
1302 So I think this assignment could be deleted without effect. */
1303 b
->address
= (CORE_ADDR
) NULL
;
1305 /* FIXME what about longjmp breakpoints? Re-create them here? */
1306 create_overlay_event_breakpoint ("_ovly_debug_event");
1310 detach_breakpoints (int pid
)
1312 register struct breakpoint
*b
;
1314 struct cleanup
*old_chain
= save_inferior_ptid ();
1316 if (pid
== PIDGET (inferior_ptid
))
1317 error ("Cannot detach breakpoints of inferior_ptid");
1319 /* Set inferior_ptid; remove_breakpoint uses this global. */
1320 inferior_ptid
= pid_to_ptid (pid
);
1325 val
= remove_breakpoint (b
, mark_inserted
);
1328 do_cleanups (old_chain
);
1333 do_cleanups (old_chain
);
1338 remove_breakpoint (struct breakpoint
*b
, insertion_state_t is
)
1342 if (b
->enable_state
== bp_permanent
)
1343 /* Permanent breakpoints cannot be inserted or removed. */
1346 if (b
->type
== bp_none
)
1347 warning ("attempted to remove apparently deleted breakpoint #%d?",
1350 if (b
->type
!= bp_watchpoint
1351 && b
->type
!= bp_hardware_watchpoint
1352 && b
->type
!= bp_read_watchpoint
1353 && b
->type
!= bp_access_watchpoint
1354 && b
->type
!= bp_catch_fork
1355 && b
->type
!= bp_catch_vfork
1356 && b
->type
!= bp_catch_exec
1357 && b
->type
!= bp_catch_catch
1358 && b
->type
!= bp_catch_throw
)
1360 /* "Normal" instruction breakpoint: either the standard
1361 trap-instruction bp (bp_breakpoint), or a
1362 bp_hardware_breakpoint. */
1364 /* First check to see if we have to handle an overlay. */
1365 if (overlay_debugging
== ovly_off
1366 || b
->section
== NULL
1367 || !(section_is_overlay (b
->section
)))
1369 /* No overlay handling: just remove the breakpoint. */
1371 if (b
->type
== bp_hardware_breakpoint
)
1372 val
= target_remove_hw_breakpoint (b
->address
,
1373 b
->shadow_contents
);
1375 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1379 /* This breakpoint is in an overlay section.
1380 Did we set a breakpoint at the LMA? */
1381 if (!overlay_events_enabled
)
1383 /* Yes -- overlay event support is not active, so we
1384 should have set a breakpoint at the LMA. Remove it.
1386 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1388 /* Ignore any failures: if the LMA is in ROM, we will
1389 have already warned when we failed to insert it. */
1390 if (b
->type
!= bp_hardware_breakpoint
)
1391 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1393 target_remove_breakpoint (addr
, b
->shadow_contents
);
1395 /* Did we set a breakpoint at the VMA?
1396 If so, we will have marked the breakpoint 'inserted'. */
1399 /* Yes -- remove it. Previously we did not bother to
1400 remove the breakpoint if the section had been
1401 unmapped, but let's not rely on that being safe. We
1402 don't know what the overlay manager might do. */
1403 if (b
->type
== bp_hardware_breakpoint
)
1404 val
= target_remove_hw_breakpoint (b
->address
,
1405 b
->shadow_contents
);
1407 val
= target_remove_breakpoint (b
->address
,
1408 b
->shadow_contents
);
1412 /* No -- not inserted, so no need to remove. No error. */
1418 b
->inserted
= (is
== mark_inserted
);
1420 else if ((b
->type
== bp_hardware_watchpoint
||
1421 b
->type
== bp_read_watchpoint
||
1422 b
->type
== bp_access_watchpoint
)
1423 && b
->enable_state
== bp_enabled
1429 b
->inserted
= (is
== mark_inserted
);
1430 /* Walk down the saved value chain. */
1431 for (v
= b
->val_chain
; v
; v
= v
->next
)
1433 /* For each memory reference remove the watchpoint
1435 if (VALUE_LVAL (v
) == lval_memory
1436 && ! VALUE_LAZY (v
))
1438 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
1440 if (v
== b
->val_chain
1441 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1442 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1447 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1448 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1450 if (b
->type
== bp_read_watchpoint
)
1452 else if (b
->type
== bp_access_watchpoint
)
1455 val
= target_remove_watchpoint (addr
, len
, type
);
1462 /* Failure to remove any of the hardware watchpoints comes here. */
1463 if ((is
== mark_uninserted
) && (b
->inserted
))
1464 warning ("Could not remove hardware watchpoint %d.",
1467 /* Free the saved value chain. We will construct a new one
1468 the next time the watchpoint is inserted. */
1469 for (v
= b
->val_chain
; v
; v
= n
)
1474 b
->val_chain
= NULL
;
1476 else if ((b
->type
== bp_catch_fork
||
1477 b
->type
== bp_catch_vfork
||
1478 b
->type
== bp_catch_exec
)
1479 && b
->enable_state
== bp_enabled
1486 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1488 case bp_catch_vfork
:
1489 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1492 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1495 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1500 b
->inserted
= (is
== mark_inserted
);
1502 else if ((b
->type
== bp_catch_catch
||
1503 b
->type
== bp_catch_throw
)
1504 && b
->enable_state
== bp_enabled
1508 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1511 b
->inserted
= (is
== mark_inserted
);
1513 else if (ep_is_exception_catchpoint (b
)
1514 && b
->inserted
/* sometimes previous insert doesn't happen */
1515 && b
->enable_state
== bp_enabled
1519 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1523 b
->inserted
= (is
== mark_inserted
);
1529 /* Clear the "inserted" flag in all breakpoints. */
1532 mark_breakpoints_out (void)
1534 register struct breakpoint
*b
;
1540 /* Clear the "inserted" flag in all breakpoints and delete any
1541 breakpoints which should go away between runs of the program.
1543 Plus other such housekeeping that has to be done for breakpoints
1546 Note: this function gets called at the end of a run (by
1547 generic_mourn_inferior) and when a run begins (by
1548 init_wait_for_inferior). */
1553 breakpoint_init_inferior (enum inf_context context
)
1555 register struct breakpoint
*b
, *temp
;
1556 static int warning_needed
= 0;
1558 ALL_BREAKPOINTS_SAFE (b
, temp
)
1565 case bp_watchpoint_scope
:
1567 /* If the call dummy breakpoint is at the entry point it will
1568 cause problems when the inferior is rerun, so we better
1571 Also get rid of scope breakpoints. */
1572 delete_breakpoint (b
);
1576 case bp_hardware_watchpoint
:
1577 case bp_read_watchpoint
:
1578 case bp_access_watchpoint
:
1580 /* Likewise for watchpoints on local expressions. */
1581 if (b
->exp_valid_block
!= NULL
)
1582 delete_breakpoint (b
);
1583 if (context
== inf_starting
)
1585 /* Reset val field to force reread of starting value
1586 in insert_breakpoints. */
1588 value_free (b
->val
);
1593 /* Likewise for exception catchpoints in dynamic-linked
1594 executables where required */
1595 if (ep_is_exception_catchpoint (b
) &&
1596 exception_catchpoints_are_fragile
)
1599 delete_breakpoint (b
);
1605 if (exception_catchpoints_are_fragile
)
1606 exception_support_initialized
= 0;
1608 /* Don't issue the warning unless it's really needed... */
1609 if (warning_needed
&& (context
!= inf_exited
))
1611 warning ("Exception catchpoints from last run were deleted.");
1612 warning ("You must reinsert them explicitly.");
1617 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1618 exists at PC. It returns ordinary_breakpoint_here if it's an
1619 ordinary breakpoint, or permanent_breakpoint_here if it's a
1620 permanent breakpoint.
1621 - When continuing from a location with an ordinary breakpoint, we
1622 actually single step once before calling insert_breakpoints.
1623 - When continuing from a localion with a permanent breakpoint, we
1624 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1625 the target, to advance the PC past the breakpoint. */
1627 enum breakpoint_here
1628 breakpoint_here_p (CORE_ADDR pc
)
1630 register struct breakpoint
*b
;
1631 int any_breakpoint_here
= 0;
1634 if ((b
->enable_state
== bp_enabled
1635 || b
->enable_state
== bp_permanent
)
1636 && b
->address
== pc
) /* bp is enabled and matches pc */
1638 if (overlay_debugging
1639 && section_is_overlay (b
->section
)
1640 && !section_is_mapped (b
->section
))
1641 continue; /* unmapped overlay -- can't be a match */
1642 else if (b
->enable_state
== bp_permanent
)
1643 return permanent_breakpoint_here
;
1645 any_breakpoint_here
= 1;
1648 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1652 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1653 but it only returns true if there is actually a breakpoint inserted
1657 breakpoint_inserted_here_p (CORE_ADDR pc
)
1659 register struct breakpoint
*b
;
1663 && b
->address
== pc
) /* bp is inserted and matches pc */
1665 if (overlay_debugging
1666 && section_is_overlay (b
->section
)
1667 && !section_is_mapped (b
->section
))
1668 continue; /* unmapped overlay -- can't be a match */
1676 /* Return nonzero if FRAME is a dummy frame. We can't use
1677 DEPRECATED_PC_IN_CALL_DUMMY because figuring out the saved SP would
1678 take too much time, at least using frame_register() on the 68k.
1679 This means that for this function to work right a port must use the
1680 bp_call_dummy breakpoint. */
1683 deprecated_frame_in_dummy (struct frame_info
*frame
)
1685 struct breakpoint
*b
;
1690 /* This function is used by two files: get_frame_type(), after first
1691 checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and
1692 sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */
1693 gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES
);
1697 if (b
->type
== bp_call_dummy
1698 && frame_id_eq (b
->frame_id
, get_frame_id (frame
))
1699 /* We need to check the PC as well as the frame on the sparc,
1700 for signals.exp in the testsuite. */
1701 && (get_frame_pc (frame
)
1703 - SIZEOF_CALL_DUMMY_WORDS
/ sizeof (LONGEST
) * REGISTER_SIZE
))
1704 && get_frame_pc (frame
) <= b
->address
)
1710 /* breakpoint_thread_match (PC, PID) returns true if the breakpoint at
1711 PC is valid for process/thread PID. */
1714 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1716 struct breakpoint
*b
;
1719 thread
= pid_to_thread_id (ptid
);
1722 if (b
->enable_state
!= bp_disabled
1723 && b
->enable_state
!= bp_shlib_disabled
1724 && b
->enable_state
!= bp_call_disabled
1726 && (b
->thread
== -1 || b
->thread
== thread
))
1728 if (overlay_debugging
1729 && section_is_overlay (b
->section
)
1730 && !section_is_mapped (b
->section
))
1731 continue; /* unmapped overlay -- can't be a match */
1740 /* bpstat stuff. External routines' interfaces are documented
1744 ep_is_catchpoint (struct breakpoint
*ep
)
1747 (ep
->type
== bp_catch_load
)
1748 || (ep
->type
== bp_catch_unload
)
1749 || (ep
->type
== bp_catch_fork
)
1750 || (ep
->type
== bp_catch_vfork
)
1751 || (ep
->type
== bp_catch_exec
)
1752 || (ep
->type
== bp_catch_catch
)
1753 || (ep
->type
== bp_catch_throw
);
1755 /* ??rehrauer: Add more kinds here, as are implemented... */
1759 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1762 (ep
->type
== bp_catch_load
)
1763 || (ep
->type
== bp_catch_unload
);
1767 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1770 (ep
->type
== bp_catch_catch
)
1771 || (ep
->type
== bp_catch_throw
);
1774 /* Clear a bpstat so that it says we are not at any breakpoint.
1775 Also free any storage that is part of a bpstat. */
1778 bpstat_clear (bpstat
*bsp
)
1789 if (p
->old_val
!= NULL
)
1790 value_free (p
->old_val
);
1791 free_command_lines (&p
->commands
);
1798 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1799 is part of the bpstat is copied as well. */
1802 bpstat_copy (bpstat bs
)
1806 bpstat retval
= NULL
;
1811 for (; bs
!= NULL
; bs
= bs
->next
)
1813 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1814 memcpy (tmp
, bs
, sizeof (*tmp
));
1815 if (bs
->commands
!= NULL
)
1816 tmp
->commands
= copy_command_lines (bs
->commands
);
1817 if (bs
->old_val
!= NULL
)
1818 tmp
->old_val
= value_copy (bs
->old_val
);
1821 /* This is the first thing in the chain. */
1831 /* Find the bpstat associated with this breakpoint */
1834 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1839 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1841 if (bsp
->breakpoint_at
== breakpoint
)
1847 /* Find a step_resume breakpoint associated with this bpstat.
1848 (If there are multiple step_resume bp's on the list, this function
1849 will arbitrarily pick one.)
1851 It is an error to use this function if BPSTAT doesn't contain a
1852 step_resume breakpoint.
1854 See wait_for_inferior's use of this function. */
1856 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1861 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1863 current_thread
= pid_to_thread_id (inferior_ptid
);
1865 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1867 if ((bsp
->breakpoint_at
!= NULL
) &&
1868 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1869 (bsp
->breakpoint_at
->thread
== current_thread
||
1870 bsp
->breakpoint_at
->thread
== -1))
1871 return bsp
->breakpoint_at
;
1874 error ("Internal error (no step_resume breakpoint found)");
1878 /* Return the breakpoint number of the first breakpoint we are stopped
1879 at. *BSP upon return is a bpstat which points to the remaining
1880 breakpoints stopped at (but which is not guaranteed to be good for
1881 anything but further calls to bpstat_num).
1882 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1885 bpstat_num (bpstat
*bsp
)
1887 struct breakpoint
*b
;
1890 return 0; /* No more breakpoint values */
1893 b
= (*bsp
)->breakpoint_at
;
1894 *bsp
= (*bsp
)->next
;
1896 return -1; /* breakpoint that's been deleted since */
1898 return b
->number
; /* We have its number */
1902 /* Modify BS so that the actions will not be performed. */
1905 bpstat_clear_actions (bpstat bs
)
1907 for (; bs
!= NULL
; bs
= bs
->next
)
1909 free_command_lines (&bs
->commands
);
1910 if (bs
->old_val
!= NULL
)
1912 value_free (bs
->old_val
);
1918 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1921 cleanup_executing_breakpoints (void *ignore
)
1923 executing_breakpoint_commands
= 0;
1926 /* Execute all the commands associated with all the breakpoints at this
1927 location. Any of these commands could cause the process to proceed
1928 beyond this point, etc. We look out for such changes by checking
1929 the global "breakpoint_proceeded" after each command. */
1932 bpstat_do_actions (bpstat
*bsp
)
1935 struct cleanup
*old_chain
;
1936 struct command_line
*cmd
;
1938 /* Avoid endless recursion if a `source' command is contained
1940 if (executing_breakpoint_commands
)
1943 executing_breakpoint_commands
= 1;
1944 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
1947 /* Note that (as of this writing), our callers all appear to
1948 be passing us the address of global stop_bpstat. And, if
1949 our calls to execute_control_command cause the inferior to
1950 proceed, that global (and hence, *bsp) will change.
1952 We must be careful to not touch *bsp unless the inferior
1953 has not proceeded. */
1955 /* This pointer will iterate over the list of bpstat's. */
1958 breakpoint_proceeded
= 0;
1959 for (; bs
!= NULL
; bs
= bs
->next
)
1964 execute_control_command (cmd
);
1966 if (breakpoint_proceeded
)
1971 if (breakpoint_proceeded
)
1972 /* The inferior is proceeded by the command; bomb out now.
1973 The bpstat chain has been blown away by wait_for_inferior.
1974 But since execution has stopped again, there is a new bpstat
1975 to look at, so start over. */
1978 free_command_lines (&bs
->commands
);
1980 do_cleanups (old_chain
);
1983 /* This is the normal print function for a bpstat. In the future,
1984 much of this logic could (should?) be moved to bpstat_stop_status,
1985 by having it set different print_it values.
1987 Current scheme: When we stop, bpstat_print() is called. It loops
1988 through the bpstat list of things causing this stop, calling the
1989 print_bp_stop_message function on each one. The behavior of the
1990 print_bp_stop_message function depends on the print_it field of
1991 bpstat. If such field so indicates, call this function here.
1993 Return values from this routine (ultimately used by bpstat_print()
1994 and normal_stop() to decide what to do):
1995 PRINT_NOTHING: Means we already printed all we needed to print,
1996 don't print anything else.
1997 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
1998 that something to be followed by a location.
1999 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2000 that something to be followed by a location.
2001 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2004 static enum print_stop_action
2005 print_it_typical (bpstat bs
)
2007 struct cleanup
*old_chain
, *ui_out_chain
;
2008 struct ui_stream
*stb
;
2009 stb
= ui_out_stream_new (uiout
);
2010 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2011 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2012 which has since been deleted. */
2013 if (bs
->breakpoint_at
== NULL
)
2014 return PRINT_UNKNOWN
;
2016 switch (bs
->breakpoint_at
->type
)
2019 case bp_hardware_breakpoint
:
2020 annotate_breakpoint (bs
->breakpoint_at
->number
);
2021 ui_out_text (uiout
, "\nBreakpoint ");
2022 if (ui_out_is_mi_like_p (uiout
))
2023 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2024 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2025 ui_out_text (uiout
, ", ");
2026 return PRINT_SRC_AND_LOC
;
2029 case bp_shlib_event
:
2030 /* Did we stop because the user set the stop_on_solib_events
2031 variable? (If so, we report this as a generic, "Stopped due
2032 to shlib event" message.) */
2033 printf_filtered ("Stopped due to shared library event\n");
2034 return PRINT_NOTHING
;
2037 case bp_thread_event
:
2038 /* Not sure how we will get here.
2039 GDB should not stop for these breakpoints. */
2040 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2041 return PRINT_NOTHING
;
2044 case bp_overlay_event
:
2045 /* By analogy with the thread event, GDB should not stop for these. */
2046 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2047 return PRINT_NOTHING
;
2051 annotate_catchpoint (bs
->breakpoint_at
->number
);
2052 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2053 printf_filtered ("loaded");
2054 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2055 return PRINT_SRC_AND_LOC
;
2058 case bp_catch_unload
:
2059 annotate_catchpoint (bs
->breakpoint_at
->number
);
2060 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2061 printf_filtered ("unloaded");
2062 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2063 return PRINT_SRC_AND_LOC
;
2067 annotate_catchpoint (bs
->breakpoint_at
->number
);
2068 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2069 printf_filtered ("forked");
2070 printf_filtered (" process %d), ",
2071 bs
->breakpoint_at
->forked_inferior_pid
);
2072 return PRINT_SRC_AND_LOC
;
2075 case bp_catch_vfork
:
2076 annotate_catchpoint (bs
->breakpoint_at
->number
);
2077 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2078 printf_filtered ("vforked");
2079 printf_filtered (" process %d), ",
2080 bs
->breakpoint_at
->forked_inferior_pid
);
2081 return PRINT_SRC_AND_LOC
;
2085 annotate_catchpoint (bs
->breakpoint_at
->number
);
2086 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2087 bs
->breakpoint_at
->number
,
2088 bs
->breakpoint_at
->exec_pathname
);
2089 return PRINT_SRC_AND_LOC
;
2092 case bp_catch_catch
:
2093 if (current_exception_event
&&
2094 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2096 annotate_catchpoint (bs
->breakpoint_at
->number
);
2097 printf_filtered ("\nCatchpoint %d (exception caught), ",
2098 bs
->breakpoint_at
->number
);
2099 printf_filtered ("throw location ");
2100 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2101 printf_filtered ("%s:%d",
2102 CURRENT_EXCEPTION_THROW_FILE
,
2103 CURRENT_EXCEPTION_THROW_LINE
);
2105 printf_filtered ("unknown");
2107 printf_filtered (", catch location ");
2108 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2109 printf_filtered ("%s:%d",
2110 CURRENT_EXCEPTION_CATCH_FILE
,
2111 CURRENT_EXCEPTION_CATCH_LINE
);
2113 printf_filtered ("unknown");
2115 printf_filtered ("\n");
2116 /* don't bother to print location frame info */
2117 return PRINT_SRC_ONLY
;
2121 /* really throw, some other bpstat will handle it */
2122 return PRINT_UNKNOWN
;
2126 case bp_catch_throw
:
2127 if (current_exception_event
&&
2128 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2130 annotate_catchpoint (bs
->breakpoint_at
->number
);
2131 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2132 bs
->breakpoint_at
->number
);
2133 printf_filtered ("throw location ");
2134 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2135 printf_filtered ("%s:%d",
2136 CURRENT_EXCEPTION_THROW_FILE
,
2137 CURRENT_EXCEPTION_THROW_LINE
);
2139 printf_filtered ("unknown");
2141 printf_filtered (", catch location ");
2142 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2143 printf_filtered ("%s:%d",
2144 CURRENT_EXCEPTION_CATCH_FILE
,
2145 CURRENT_EXCEPTION_CATCH_LINE
);
2147 printf_filtered ("unknown");
2149 printf_filtered ("\n");
2150 /* don't bother to print location frame info */
2151 return PRINT_SRC_ONLY
;
2155 /* really catch, some other bpstat will handle it */
2156 return PRINT_UNKNOWN
;
2161 case bp_hardware_watchpoint
:
2162 if (bs
->old_val
!= NULL
)
2164 annotate_watchpoint (bs
->breakpoint_at
->number
);
2165 if (ui_out_is_mi_like_p (uiout
))
2166 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2167 mention (bs
->breakpoint_at
);
2168 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2169 ui_out_text (uiout
, "\nOld value = ");
2170 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2171 ui_out_field_stream (uiout
, "old", stb
);
2172 ui_out_text (uiout
, "\nNew value = ");
2173 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2174 ui_out_field_stream (uiout
, "new", stb
);
2175 do_cleanups (ui_out_chain
);
2176 ui_out_text (uiout
, "\n");
2177 value_free (bs
->old_val
);
2180 /* More than one watchpoint may have been triggered. */
2181 return PRINT_UNKNOWN
;
2184 case bp_read_watchpoint
:
2185 if (ui_out_is_mi_like_p (uiout
))
2186 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2187 mention (bs
->breakpoint_at
);
2188 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2189 ui_out_text (uiout
, "\nValue = ");
2190 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2191 ui_out_field_stream (uiout
, "value", stb
);
2192 do_cleanups (ui_out_chain
);
2193 ui_out_text (uiout
, "\n");
2194 return PRINT_UNKNOWN
;
2197 case bp_access_watchpoint
:
2198 if (bs
->old_val
!= NULL
)
2200 annotate_watchpoint (bs
->breakpoint_at
->number
);
2201 if (ui_out_is_mi_like_p (uiout
))
2202 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2203 mention (bs
->breakpoint_at
);
2204 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2205 ui_out_text (uiout
, "\nOld value = ");
2206 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2207 ui_out_field_stream (uiout
, "old", stb
);
2208 value_free (bs
->old_val
);
2210 ui_out_text (uiout
, "\nNew value = ");
2214 mention (bs
->breakpoint_at
);
2215 if (ui_out_is_mi_like_p (uiout
))
2216 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2217 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2218 ui_out_text (uiout
, "\nValue = ");
2220 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2221 ui_out_field_stream (uiout
, "new", stb
);
2222 do_cleanups (ui_out_chain
);
2223 ui_out_text (uiout
, "\n");
2224 return PRINT_UNKNOWN
;
2227 /* Fall through, we don't deal with these types of breakpoints
2231 if (ui_out_is_mi_like_p (uiout
))
2232 ui_out_field_string (uiout
, "reason", "function-finished");
2233 return PRINT_UNKNOWN
;
2237 if (ui_out_is_mi_like_p (uiout
))
2238 ui_out_field_string (uiout
, "reason", "location-reached");
2239 return PRINT_UNKNOWN
;
2244 case bp_longjmp_resume
:
2245 case bp_step_resume
:
2246 case bp_through_sigtramp
:
2247 case bp_watchpoint_scope
:
2250 return PRINT_UNKNOWN
;
2254 /* Generic routine for printing messages indicating why we
2255 stopped. The behavior of this function depends on the value
2256 'print_it' in the bpstat structure. Under some circumstances we
2257 may decide not to print anything here and delegate the task to
2260 static enum print_stop_action
2261 print_bp_stop_message (bpstat bs
)
2263 switch (bs
->print_it
)
2266 /* Nothing should be printed for this bpstat entry. */
2267 return PRINT_UNKNOWN
;
2271 /* We still want to print the frame, but we already printed the
2272 relevant messages. */
2273 return PRINT_SRC_AND_LOC
;
2276 case print_it_normal
:
2277 /* Normal case, we handle everything in print_it_typical. */
2278 return print_it_typical (bs
);
2281 internal_error (__FILE__
, __LINE__
,
2282 "print_bp_stop_message: unrecognized enum value");
2287 /* Print a message indicating what happened. This is called from
2288 normal_stop(). The input to this routine is the head of the bpstat
2289 list - a list of the eventpoints that caused this stop. This
2290 routine calls the generic print routine for printing a message
2291 about reasons for stopping. This will print (for example) the
2292 "Breakpoint n," part of the output. The return value of this
2295 PRINT_UNKNOWN: Means we printed nothing
2296 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2297 code to print the location. An example is
2298 "Breakpoint 1, " which should be followed by
2300 PRINT_SRC_ONLY: Means we printed something, but there is no need
2301 to also print the location part of the message.
2302 An example is the catch/throw messages, which
2303 don't require a location appended to the end.
2304 PRINT_NOTHING: We have done some printing and we don't need any
2305 further info to be printed.*/
2307 enum print_stop_action
2308 bpstat_print (bpstat bs
)
2312 /* Maybe another breakpoint in the chain caused us to stop.
2313 (Currently all watchpoints go on the bpstat whether hit or not.
2314 That probably could (should) be changed, provided care is taken
2315 with respect to bpstat_explains_signal). */
2316 for (; bs
; bs
= bs
->next
)
2318 val
= print_bp_stop_message (bs
);
2319 if (val
== PRINT_SRC_ONLY
2320 || val
== PRINT_SRC_AND_LOC
2321 || val
== PRINT_NOTHING
)
2325 /* We reached the end of the chain, or we got a null BS to start
2326 with and nothing was printed. */
2327 return PRINT_UNKNOWN
;
2330 /* Evaluate the expression EXP and return 1 if value is zero.
2331 This is used inside a catch_errors to evaluate the breakpoint condition.
2332 The argument is a "struct expression *" that has been cast to char * to
2333 make it pass through catch_errors. */
2336 breakpoint_cond_eval (void *exp
)
2338 struct value
*mark
= value_mark ();
2339 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2340 value_free_to_mark (mark
);
2344 /* Allocate a new bpstat and chain it to the current one. */
2347 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2351 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2353 bs
->breakpoint_at
= b
;
2354 /* If the condition is false, etc., don't do the commands. */
2355 bs
->commands
= NULL
;
2357 bs
->print_it
= print_it_normal
;
2361 /* Possible return values for watchpoint_check (this can't be an enum
2362 because of check_errors). */
2363 /* The watchpoint has been deleted. */
2364 #define WP_DELETED 1
2365 /* The value has changed. */
2366 #define WP_VALUE_CHANGED 2
2367 /* The value has not changed. */
2368 #define WP_VALUE_NOT_CHANGED 3
2370 #define BP_TEMPFLAG 1
2371 #define BP_HARDWAREFLAG 2
2373 /* Check watchpoint condition. */
2376 watchpoint_check (void *p
)
2378 bpstat bs
= (bpstat
) p
;
2379 struct breakpoint
*b
;
2380 struct frame_info
*fr
;
2381 int within_current_scope
;
2383 b
= bs
->breakpoint_at
;
2385 if (b
->exp_valid_block
== NULL
)
2386 within_current_scope
= 1;
2389 /* There is no current frame at this moment. If we're going to have
2390 any chance of handling watchpoints on local variables, we'll need
2391 the frame chain (so we can determine if we're in scope). */
2392 reinit_frame_cache ();
2393 fr
= frame_find_by_id (b
->watchpoint_frame
);
2394 within_current_scope
= (fr
!= NULL
);
2395 /* in_function_epilogue_p() returns a non-zero value if we're still
2396 in the function but the stack frame has already been invalidated.
2397 Since we can't rely on the values of local variables after the
2398 stack has been destroyed, we are treating the watchpoint in that
2399 state as `not changed' without further checking. */
2400 if (within_current_scope
&& fr
== get_current_frame ()
2401 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2402 return WP_VALUE_NOT_CHANGED
;
2403 if (within_current_scope
)
2404 /* If we end up stopping, the current frame will get selected
2405 in normal_stop. So this call to select_frame won't affect
2410 if (within_current_scope
)
2412 /* We use value_{,free_to_}mark because it could be a
2413 *long* time before we return to the command level and
2414 call free_all_values. We can't call free_all_values because
2415 we might be in the middle of evaluating a function call. */
2417 struct value
*mark
= value_mark ();
2418 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2419 if (!value_equal (b
->val
, new_val
))
2421 release_value (new_val
);
2422 value_free_to_mark (mark
);
2423 bs
->old_val
= b
->val
;
2425 /* We will stop here */
2426 return WP_VALUE_CHANGED
;
2430 /* Nothing changed, don't do anything. */
2431 value_free_to_mark (mark
);
2432 /* We won't stop here */
2433 return WP_VALUE_NOT_CHANGED
;
2438 /* This seems like the only logical thing to do because
2439 if we temporarily ignored the watchpoint, then when
2440 we reenter the block in which it is valid it contains
2441 garbage (in the case of a function, it may have two
2442 garbage values, one before and one after the prologue).
2443 So we can't even detect the first assignment to it and
2444 watch after that (since the garbage may or may not equal
2445 the first value assigned). */
2446 /* We print all the stop information in print_it_typical(), but
2447 in this case, by the time we call print_it_typical() this bp
2448 will be deleted already. So we have no choice but print the
2449 information here. */
2450 if (ui_out_is_mi_like_p (uiout
))
2451 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2452 ui_out_text (uiout
, "\nWatchpoint ");
2453 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2454 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2455 which its expression is valid.\n");
2457 if (b
->related_breakpoint
)
2458 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2459 b
->disposition
= disp_del_at_next_stop
;
2465 /* Get a bpstat associated with having just stopped at address *PC
2466 and frame address CORE_ADDRESS. Update *PC to point at the
2467 breakpoint (if we hit a breakpoint). NOT_A_SW_BREAKPOINT is nonzero
2468 if this is known to not be a real breakpoint (it could still be a
2469 watchpoint, though). */
2471 /* Determine whether we stopped at a breakpoint, etc, or whether we
2472 don't understand this stop. Result is a chain of bpstat's such that:
2474 if we don't understand the stop, the result is a null pointer.
2476 if we understand why we stopped, the result is not null.
2478 Each element of the chain refers to a particular breakpoint or
2479 watchpoint at which we have stopped. (We may have stopped for
2480 several reasons concurrently.)
2482 Each element of the chain has valid next, breakpoint_at,
2483 commands, FIXME??? fields. */
2486 bpstat_stop_status (CORE_ADDR
*pc
, int not_a_sw_breakpoint
)
2488 register struct breakpoint
*b
, *temp
;
2490 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2491 int real_breakpoint
= 0;
2492 /* Root of the chain of bpstat's */
2493 struct bpstats root_bs
[1];
2494 /* Pointer to the last thing in the chain currently. */
2495 bpstat bs
= root_bs
;
2496 static char message1
[] =
2497 "Error evaluating expression for watchpoint %d\n";
2498 char message
[sizeof (message1
) + 30 /* slop */ ];
2500 /* Get the address where the breakpoint would have been. The
2501 "not_a_sw_breakpoint" argument is meant to distinguish between a
2502 breakpoint trap event and a trace/singlestep trap event. For a
2503 trace/singlestep trap event, we would not want to subtract
2504 DECR_PC_AFTER_BREAK from the PC. */
2506 bp_addr
= *pc
- (not_a_sw_breakpoint
? 0 : DECR_PC_AFTER_BREAK
);
2508 ALL_BREAKPOINTS_SAFE (b
, temp
)
2510 if (b
->enable_state
== bp_disabled
2511 || b
->enable_state
== bp_shlib_disabled
2512 || b
->enable_state
== bp_call_disabled
)
2515 if (b
->type
!= bp_watchpoint
2516 && b
->type
!= bp_hardware_watchpoint
2517 && b
->type
!= bp_read_watchpoint
2518 && b
->type
!= bp_access_watchpoint
2519 && b
->type
!= bp_hardware_breakpoint
2520 && b
->type
!= bp_catch_fork
2521 && b
->type
!= bp_catch_vfork
2522 && b
->type
!= bp_catch_exec
2523 && b
->type
!= bp_catch_catch
2524 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2526 if (b
->address
!= bp_addr
) /* address doesn't match */
2528 if (overlay_debugging
/* unmapped overlay section */
2529 && section_is_overlay (b
->section
)
2530 && !section_is_mapped (b
->section
))
2534 if (b
->type
== bp_hardware_breakpoint
)
2536 if (b
->address
!= (*pc
- DECR_PC_AFTER_HW_BREAK
))
2538 if (overlay_debugging
/* unmapped overlay section */
2539 && section_is_overlay (b
->section
)
2540 && !section_is_mapped (b
->section
))
2544 /* Is this a catchpoint of a load or unload? If so, did we
2545 get a load or unload of the specified library? If not,
2547 if ((b
->type
== bp_catch_load
)
2548 #if defined(SOLIB_HAVE_LOAD_EVENT)
2549 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2550 || ((b
->dll_pathname
!= NULL
)
2551 && (strcmp (b
->dll_pathname
,
2552 SOLIB_LOADED_LIBRARY_PATHNAME (
2553 PIDGET (inferior_ptid
)))
2559 if ((b
->type
== bp_catch_unload
)
2560 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2561 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2562 || ((b
->dll_pathname
!= NULL
)
2563 && (strcmp (b
->dll_pathname
,
2564 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2565 PIDGET (inferior_ptid
)))
2571 if ((b
->type
== bp_catch_fork
)
2572 && !inferior_has_forked (PIDGET (inferior_ptid
),
2573 &b
->forked_inferior_pid
))
2576 if ((b
->type
== bp_catch_vfork
)
2577 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2578 &b
->forked_inferior_pid
))
2581 if ((b
->type
== bp_catch_exec
)
2582 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2585 if (ep_is_exception_catchpoint (b
) &&
2586 !(current_exception_event
= target_get_current_exception_event ()))
2589 /* Come here if it's a watchpoint, or if the break address matches */
2591 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2593 /* Watchpoints may change this, if not found to have triggered. */
2597 sprintf (message
, message1
, b
->number
);
2598 if (b
->type
== bp_watchpoint
||
2599 b
->type
== bp_hardware_watchpoint
)
2601 switch (catch_errors (watchpoint_check
, bs
, message
,
2605 /* We've already printed what needs to be printed. */
2606 /* Actually this is superfluous, because by the time we
2607 call print_it_typical() the wp will be already deleted,
2608 and the function will return immediately. */
2609 bs
->print_it
= print_it_done
;
2612 case WP_VALUE_CHANGED
:
2616 case WP_VALUE_NOT_CHANGED
:
2618 bs
->print_it
= print_it_noop
;
2625 /* Error from catch_errors. */
2626 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2627 if (b
->related_breakpoint
)
2628 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2629 b
->disposition
= disp_del_at_next_stop
;
2630 /* We've already printed what needs to be printed. */
2631 bs
->print_it
= print_it_done
;
2637 else if (b
->type
== bp_read_watchpoint
||
2638 b
->type
== bp_access_watchpoint
)
2644 addr
= target_stopped_data_address ();
2647 for (v
= b
->val_chain
; v
; v
= v
->next
)
2649 if (VALUE_LVAL (v
) == lval_memory
2650 && ! VALUE_LAZY (v
))
2652 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
2654 if (v
== b
->val_chain
2655 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2656 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2660 vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
2661 /* Exact match not required. Within range is
2663 if (addr
>= vaddr
&&
2664 addr
< vaddr
+ TYPE_LENGTH (VALUE_TYPE (v
)))
2670 switch (catch_errors (watchpoint_check
, bs
, message
,
2674 /* We've already printed what needs to be printed. */
2675 bs
->print_it
= print_it_done
;
2678 case WP_VALUE_CHANGED
:
2679 if (b
->type
== bp_read_watchpoint
)
2681 /* Don't stop: read watchpoints shouldn't fire if
2682 the value has changed. This is for targets which
2683 cannot set read-only watchpoints. */
2684 bs
->print_it
= print_it_noop
;
2690 case WP_VALUE_NOT_CHANGED
:
2697 /* Error from catch_errors. */
2698 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2699 if (b
->related_breakpoint
)
2700 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2701 b
->disposition
= disp_del_at_next_stop
;
2702 /* We've already printed what needs to be printed. */
2703 bs
->print_it
= print_it_done
;
2706 else /* found == 0 */
2708 /* This is a case where some watchpoint(s) triggered,
2709 but not at the address of this watchpoint (FOUND
2710 was left zero). So don't print anything for this
2712 bs
->print_it
= print_it_noop
;
2719 /* By definition, an encountered breakpoint is a triggered
2723 real_breakpoint
= 1;
2726 if (frame_id_p (b
->frame_id
)
2727 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2731 int value_is_zero
= 0;
2735 /* Need to select the frame, with all that implies
2736 so that the conditions will have the right context. */
2737 select_frame (get_current_frame ());
2739 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2740 "Error in testing breakpoint condition:\n",
2742 /* FIXME-someday, should give breakpoint # */
2745 if (b
->cond
&& value_is_zero
)
2748 /* Don't consider this a hit. */
2751 else if (b
->ignore_count
> 0)
2754 annotate_ignore_count_change ();
2759 /* We will stop here */
2760 if (b
->disposition
== disp_disable
)
2761 b
->enable_state
= bp_disabled
;
2764 bs
->commands
= b
->commands
;
2766 (STREQ ("silent", bs
->commands
->line
) ||
2767 (xdb_commands
&& STREQ ("Q", bs
->commands
->line
))))
2769 bs
->commands
= bs
->commands
->next
;
2772 bs
->commands
= copy_command_lines (bs
->commands
);
2775 /* Print nothing for this entry if we dont stop or if we dont print. */
2776 if (bs
->stop
== 0 || bs
->print
== 0)
2777 bs
->print_it
= print_it_noop
;
2780 bs
->next
= NULL
; /* Terminate the chain */
2781 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2783 if (real_breakpoint
&& bs
)
2785 if (bs
->breakpoint_at
->type
== bp_hardware_breakpoint
)
2787 if (DECR_PC_AFTER_HW_BREAK
!= 0)
2789 *pc
= *pc
- DECR_PC_AFTER_HW_BREAK
;
2795 if (DECR_PC_AFTER_BREAK
!= 0 || must_shift_inst_regs
)
2798 #if defined (SHIFT_INST_REGS)
2800 #else /* No SHIFT_INST_REGS. */
2802 #endif /* No SHIFT_INST_REGS. */
2807 /* The value of a hardware watchpoint hasn't changed, but the
2808 intermediate memory locations we are watching may have. */
2809 if (bs
&& !bs
->stop
&&
2810 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2811 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2812 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2814 remove_breakpoints ();
2815 insert_breakpoints ();
2820 /* Tell what to do about this bpstat. */
2822 bpstat_what (bpstat bs
)
2824 /* Classify each bpstat as one of the following. */
2827 /* This bpstat element has no effect on the main_action. */
2830 /* There was a watchpoint, stop but don't print. */
2833 /* There was a watchpoint, stop and print. */
2836 /* There was a breakpoint but we're not stopping. */
2839 /* There was a breakpoint, stop but don't print. */
2842 /* There was a breakpoint, stop and print. */
2845 /* We hit the longjmp breakpoint. */
2848 /* We hit the longjmp_resume breakpoint. */
2851 /* We hit the step_resume breakpoint. */
2854 /* We hit the through_sigtramp breakpoint. */
2857 /* We hit the shared library event breakpoint. */
2860 /* We caught a shared library event. */
2863 /* This is just used to count how many enums there are. */
2867 /* Here is the table which drives this routine. So that we can
2868 format it pretty, we define some abbreviations for the
2869 enum bpstat_what codes. */
2870 #define kc BPSTAT_WHAT_KEEP_CHECKING
2871 #define ss BPSTAT_WHAT_STOP_SILENT
2872 #define sn BPSTAT_WHAT_STOP_NOISY
2873 #define sgl BPSTAT_WHAT_SINGLE
2874 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2875 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2876 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2877 #define sr BPSTAT_WHAT_STEP_RESUME
2878 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2879 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2880 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2882 /* "Can't happen." Might want to print an error message.
2883 abort() is not out of the question, but chances are GDB is just
2884 a bit confused, not unusable. */
2885 #define err BPSTAT_WHAT_STOP_NOISY
2887 /* Given an old action and a class, come up with a new action. */
2888 /* One interesting property of this table is that wp_silent is the same
2889 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2890 after stopping, the check for whether to step over a breakpoint
2891 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2892 reference to how we stopped. We retain separate wp_silent and
2893 bp_silent codes in case we want to change that someday.
2895 Another possibly interesting property of this table is that
2896 there's a partial ordering, priority-like, of the actions. Once
2897 you've decided that some action is appropriate, you'll never go
2898 back and decide something of a lower priority is better. The
2901 kc < clr sgl shl shlr slr sn sr ss ts
2902 sgl < clrs shl shlr slr sn sr ss ts
2903 slr < err shl shlr sn sr ss ts
2904 clr < clrs err shl shlr sn sr ss ts
2905 clrs < err shl shlr sn sr ss ts
2906 ss < shl shlr sn sr ts
2913 What I think this means is that we don't need a damned table
2914 here. If you just put the rows and columns in the right order,
2915 it'd look awfully regular. We could simply walk the bpstat list
2916 and choose the highest priority action we find, with a little
2917 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2918 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2919 is messy anyway). */
2921 /* step_resume entries: a step resume breakpoint overrides another
2922 breakpoint of signal handling (see comment in wait_for_inferior
2923 at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
2924 /* We handle the through_sigtramp_breakpoint the same way; having both
2925 one of those and a step_resume_breakpoint is probably very rare (?). */
2927 static const enum bpstat_what_main_action
2928 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
2931 /* kc ss sn sgl slr clr clrs sr ts shl shlr
2934 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
2936 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
2938 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
2940 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
2942 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
2944 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
2946 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
2948 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
2950 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
2952 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
2954 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
2956 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
2971 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
2972 struct bpstat_what retval
;
2974 retval
.call_dummy
= 0;
2975 for (; bs
!= NULL
; bs
= bs
->next
)
2977 enum class bs_class
= no_effect
;
2978 if (bs
->breakpoint_at
== NULL
)
2979 /* I suspect this can happen if it was a momentary breakpoint
2980 which has since been deleted. */
2982 switch (bs
->breakpoint_at
->type
)
2988 case bp_hardware_breakpoint
:
2994 bs_class
= bp_noisy
;
2996 bs_class
= bp_silent
;
2999 bs_class
= bp_nostop
;
3002 case bp_hardware_watchpoint
:
3003 case bp_read_watchpoint
:
3004 case bp_access_watchpoint
:
3008 bs_class
= wp_noisy
;
3010 bs_class
= wp_silent
;
3013 /* There was a watchpoint, but we're not stopping.
3014 This requires no further action. */
3015 bs_class
= no_effect
;
3018 bs_class
= long_jump
;
3020 case bp_longjmp_resume
:
3021 bs_class
= long_resume
;
3023 case bp_step_resume
:
3026 bs_class
= step_resume
;
3029 /* It is for the wrong frame. */
3030 bs_class
= bp_nostop
;
3032 case bp_through_sigtramp
:
3033 bs_class
= through_sig
;
3035 case bp_watchpoint_scope
:
3036 bs_class
= bp_nostop
;
3038 case bp_shlib_event
:
3039 bs_class
= shlib_event
;
3041 case bp_thread_event
:
3042 case bp_overlay_event
:
3043 bs_class
= bp_nostop
;
3046 case bp_catch_unload
:
3047 /* Only if this catchpoint triggered should we cause the
3048 step-out-of-dld behaviour. Otherwise, we ignore this
3051 bs_class
= catch_shlib_event
;
3053 bs_class
= no_effect
;
3056 case bp_catch_vfork
:
3061 bs_class
= bp_noisy
;
3063 bs_class
= bp_silent
;
3066 /* There was a catchpoint, but we're not stopping.
3067 This requires no further action. */
3068 bs_class
= no_effect
;
3070 case bp_catch_catch
:
3071 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3072 bs_class
= bp_nostop
;
3074 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3076 case bp_catch_throw
:
3077 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3078 bs_class
= bp_nostop
;
3080 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3083 /* Make sure the action is stop (silent or noisy),
3084 so infrun.c pops the dummy frame. */
3085 bs_class
= bp_silent
;
3086 retval
.call_dummy
= 1;
3089 current_action
= table
[(int) bs_class
][(int) current_action
];
3091 retval
.main_action
= current_action
;
3095 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3096 without hardware support). This isn't related to a specific bpstat,
3097 just to things like whether watchpoints are set. */
3100 bpstat_should_step (void)
3102 struct breakpoint
*b
;
3104 if (b
->enable_state
== bp_enabled
&& b
->type
== bp_watchpoint
)
3109 /* Nonzero if there are enabled hardware watchpoints. */
3111 bpstat_have_active_hw_watchpoints (void)
3113 struct breakpoint
*b
;
3115 if ((b
->enable_state
== bp_enabled
) &&
3117 ((b
->type
== bp_hardware_watchpoint
) ||
3118 (b
->type
== bp_read_watchpoint
) ||
3119 (b
->type
== bp_access_watchpoint
)))
3125 /* Given a bpstat that records zero or more triggered eventpoints, this
3126 function returns another bpstat which contains only the catchpoints
3127 on that first list, if any. */
3129 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3131 struct bpstats root_bs
[1];
3132 bpstat bs
= root_bs
;
3133 struct breakpoint
*ep
;
3136 bpstat_clear (cp_list
);
3137 root_bs
->next
= NULL
;
3139 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3141 /* Is this eventpoint a catchpoint? If not, ignore it. */
3142 ep
= ep_list
->breakpoint_at
;
3145 if ((ep
->type
!= bp_catch_load
) &&
3146 (ep
->type
!= bp_catch_unload
) &&
3147 (ep
->type
!= bp_catch_catch
) &&
3148 (ep
->type
!= bp_catch_throw
))
3149 /* pai: (temp) ADD fork/vfork here!! */
3152 /* Yes; add it to the list. */
3153 bs
= bpstat_alloc (ep
, bs
);
3158 #if defined(SOLIB_ADD)
3159 /* Also, for each triggered catchpoint, tag it with the name of
3160 the library that caused this trigger. (We copy the name now,
3161 because it's only guaranteed to be available NOW, when the
3162 catchpoint triggers. Clients who may wish to know the name
3163 later must get it from the catchpoint itself.) */
3164 if (ep
->triggered_dll_pathname
!= NULL
)
3165 xfree (ep
->triggered_dll_pathname
);
3166 if (ep
->type
== bp_catch_load
)
3167 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3168 PIDGET (inferior_ptid
));
3170 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3171 PIDGET (inferior_ptid
));
3173 dll_pathname
= NULL
;
3177 ep
->triggered_dll_pathname
= (char *)
3178 xmalloc (strlen (dll_pathname
) + 1);
3179 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3182 ep
->triggered_dll_pathname
= NULL
;
3188 /* Print B to gdb_stdout. */
3190 print_one_breakpoint (struct breakpoint
*b
,
3191 CORE_ADDR
*last_addr
)
3193 register struct command_line
*l
;
3194 register struct symbol
*sym
;
3195 struct ep_type_description
3200 static struct ep_type_description bptypes
[] =
3202 {bp_none
, "?deleted?"},
3203 {bp_breakpoint
, "breakpoint"},
3204 {bp_hardware_breakpoint
, "hw breakpoint"},
3205 {bp_until
, "until"},
3206 {bp_finish
, "finish"},
3207 {bp_watchpoint
, "watchpoint"},
3208 {bp_hardware_watchpoint
, "hw watchpoint"},
3209 {bp_read_watchpoint
, "read watchpoint"},
3210 {bp_access_watchpoint
, "acc watchpoint"},
3211 {bp_longjmp
, "longjmp"},
3212 {bp_longjmp_resume
, "longjmp resume"},
3213 {bp_step_resume
, "step resume"},
3214 {bp_through_sigtramp
, "sigtramp"},
3215 {bp_watchpoint_scope
, "watchpoint scope"},
3216 {bp_call_dummy
, "call dummy"},
3217 {bp_shlib_event
, "shlib events"},
3218 {bp_thread_event
, "thread events"},
3219 {bp_overlay_event
, "overlay events"},
3220 {bp_catch_load
, "catch load"},
3221 {bp_catch_unload
, "catch unload"},
3222 {bp_catch_fork
, "catch fork"},
3223 {bp_catch_vfork
, "catch vfork"},
3224 {bp_catch_exec
, "catch exec"},
3225 {bp_catch_catch
, "catch catch"},
3226 {bp_catch_throw
, "catch throw"}
3229 static char *bpdisps
[] =
3230 {"del", "dstp", "dis", "keep"};
3231 static char bpenables
[] = "nynny";
3232 char wrap_indent
[80];
3233 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3234 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3235 struct cleanup
*bkpt_chain
;
3238 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3242 ui_out_field_int (uiout
, "number", b
->number
);
3246 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3247 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3248 internal_error (__FILE__
, __LINE__
,
3249 "bptypes table does not describe type #%d.",
3251 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3255 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3259 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3260 ui_out_spaces (uiout
, 2);
3263 strcpy (wrap_indent
, " ");
3266 if (TARGET_ADDR_BIT
<= 32)
3267 strcat (wrap_indent
, " ");
3269 strcat (wrap_indent
, " ");
3274 internal_error (__FILE__
, __LINE__
,
3275 "print_one_breakpoint: bp_none encountered\n");
3279 case bp_hardware_watchpoint
:
3280 case bp_read_watchpoint
:
3281 case bp_access_watchpoint
:
3282 /* Field 4, the address, is omitted (which makes the columns
3283 not line up too nicely with the headers, but the effect
3284 is relatively readable). */
3286 ui_out_field_skip (uiout
, "addr");
3288 print_expression (b
->exp
, stb
->stream
);
3289 ui_out_field_stream (uiout
, "what", stb
);
3293 case bp_catch_unload
:
3294 /* Field 4, the address, is omitted (which makes the columns
3295 not line up too nicely with the headers, but the effect
3296 is relatively readable). */
3298 ui_out_field_skip (uiout
, "addr");
3300 if (b
->dll_pathname
== NULL
)
3302 ui_out_field_string (uiout
, "what", "<any library>");
3303 ui_out_spaces (uiout
, 1);
3307 ui_out_text (uiout
, "library \"");
3308 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3309 ui_out_text (uiout
, "\" ");
3314 case bp_catch_vfork
:
3315 /* Field 4, the address, is omitted (which makes the columns
3316 not line up too nicely with the headers, but the effect
3317 is relatively readable). */
3319 ui_out_field_skip (uiout
, "addr");
3321 if (b
->forked_inferior_pid
!= 0)
3323 ui_out_text (uiout
, "process ");
3324 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3325 ui_out_spaces (uiout
, 1);
3329 /* Field 4, the address, is omitted (which makes the columns
3330 not line up too nicely with the headers, but the effect
3331 is relatively readable). */
3333 ui_out_field_skip (uiout
, "addr");
3335 if (b
->exec_pathname
!= NULL
)
3337 ui_out_text (uiout
, "program \"");
3338 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3339 ui_out_text (uiout
, "\" ");
3343 case bp_catch_catch
:
3344 /* Field 4, the address, is omitted (which makes the columns
3345 not line up too nicely with the headers, but the effect
3346 is relatively readable). */
3348 ui_out_field_skip (uiout
, "addr");
3350 ui_out_field_string (uiout
, "what", "exception catch");
3351 ui_out_spaces (uiout
, 1);
3354 case bp_catch_throw
:
3355 /* Field 4, the address, is omitted (which makes the columns
3356 not line up too nicely with the headers, but the effect
3357 is relatively readable). */
3359 ui_out_field_skip (uiout
, "addr");
3361 ui_out_field_string (uiout
, "what", "exception throw");
3362 ui_out_spaces (uiout
, 1);
3366 case bp_hardware_breakpoint
:
3370 case bp_longjmp_resume
:
3371 case bp_step_resume
:
3372 case bp_through_sigtramp
:
3373 case bp_watchpoint_scope
:
3375 case bp_shlib_event
:
3376 case bp_thread_event
:
3377 case bp_overlay_event
:
3381 ui_out_field_core_addr (uiout
, "addr", b
->address
);
3384 *last_addr
= b
->address
;
3387 sym
= find_pc_sect_function (b
->address
, b
->section
);
3390 ui_out_text (uiout
, "in ");
3391 ui_out_field_string (uiout
, "func",
3392 SYMBOL_PRINT_NAME (sym
));
3393 ui_out_wrap_hint (uiout
, wrap_indent
);
3394 ui_out_text (uiout
, " at ");
3396 ui_out_field_string (uiout
, "file", b
->source_file
);
3397 ui_out_text (uiout
, ":");
3398 ui_out_field_int (uiout
, "line", b
->line_number
);
3402 print_address_symbolic (b
->address
, stb
->stream
, demangle
, "");
3403 ui_out_field_stream (uiout
, "at", stb
);
3408 if (b
->thread
!= -1)
3410 /* FIXME: This seems to be redundant and lost here; see the
3411 "stop only in" line a little further down. */
3412 ui_out_text (uiout
, " thread ");
3413 ui_out_field_int (uiout
, "thread", b
->thread
);
3416 ui_out_text (uiout
, "\n");
3418 if (frame_id_p (b
->frame_id
))
3421 ui_out_text (uiout
, "\tstop only in stack frame at ");
3422 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3424 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.base
);
3425 ui_out_text (uiout
, "\n");
3431 ui_out_text (uiout
, "\tstop only if ");
3432 print_expression (b
->cond
, stb
->stream
);
3433 ui_out_field_stream (uiout
, "cond", stb
);
3434 ui_out_text (uiout
, "\n");
3437 if (b
->thread
!= -1)
3439 /* FIXME should make an annotation for this */
3440 ui_out_text (uiout
, "\tstop only in thread ");
3441 ui_out_field_int (uiout
, "thread", b
->thread
);
3442 ui_out_text (uiout
, "\n");
3445 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3447 /* FIXME should make an annotation for this */
3448 if (ep_is_catchpoint (b
))
3449 ui_out_text (uiout
, "\tcatchpoint");
3451 ui_out_text (uiout
, "\tbreakpoint");
3452 ui_out_text (uiout
, " already hit ");
3453 ui_out_field_int (uiout
, "times", b
->hit_count
);
3454 if (b
->hit_count
== 1)
3455 ui_out_text (uiout
, " time\n");
3457 ui_out_text (uiout
, " times\n");
3460 /* Output the count also if it is zero, but only if this is
3461 mi. FIXME: Should have a better test for this. */
3462 if (ui_out_is_mi_like_p (uiout
))
3463 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3464 ui_out_field_int (uiout
, "times", b
->hit_count
);
3466 if (b
->ignore_count
)
3469 ui_out_text (uiout
, "\tignore next ");
3470 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3471 ui_out_text (uiout
, " hits\n");
3474 if ((l
= b
->commands
))
3476 struct cleanup
*script_chain
;
3479 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3480 print_command_lines (uiout
, l
, 4);
3481 do_cleanups (script_chain
);
3483 do_cleanups (bkpt_chain
);
3484 do_cleanups (old_chain
);
3487 struct captured_breakpoint_query_args
3493 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3495 struct captured_breakpoint_query_args
*args
= data
;
3496 register struct breakpoint
*b
;
3497 CORE_ADDR dummy_addr
= 0;
3500 if (args
->bnum
== b
->number
)
3502 print_one_breakpoint (b
, &dummy_addr
);
3510 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
)
3512 struct captured_breakpoint_query_args args
;
3514 /* For the moment we don't trust print_one_breakpoint() to not throw
3516 return catch_exceptions (uiout
, do_captured_breakpoint_query
, &args
,
3517 NULL
, RETURN_MASK_ALL
);
3520 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3521 catchpoints, et.al.). */
3524 user_settable_breakpoint (const struct breakpoint
*b
)
3526 return (b
->type
== bp_breakpoint
3527 || b
->type
== bp_catch_load
3528 || b
->type
== bp_catch_unload
3529 || b
->type
== bp_catch_fork
3530 || b
->type
== bp_catch_vfork
3531 || b
->type
== bp_catch_exec
3532 || b
->type
== bp_catch_catch
3533 || b
->type
== bp_catch_throw
3534 || b
->type
== bp_hardware_breakpoint
3535 || b
->type
== bp_watchpoint
3536 || b
->type
== bp_read_watchpoint
3537 || b
->type
== bp_access_watchpoint
3538 || b
->type
== bp_hardware_watchpoint
);
3541 /* Print information on user settable breakpoint (watchpoint, etc)
3542 number BNUM. If BNUM is -1 print all user settable breakpoints.
3543 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3546 breakpoint_1 (int bnum
, int allflag
)
3548 register struct breakpoint
*b
;
3549 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3550 int nr_printable_breakpoints
;
3551 struct cleanup
*bkpttbl_chain
;
3553 /* Compute the number of rows in the table. */
3554 nr_printable_breakpoints
= 0;
3557 || bnum
== b
->number
)
3559 if (allflag
|| user_settable_breakpoint (b
))
3560 nr_printable_breakpoints
++;
3565 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3569 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3572 if (nr_printable_breakpoints
> 0)
3573 annotate_breakpoints_headers ();
3574 if (nr_printable_breakpoints
> 0)
3576 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3577 if (nr_printable_breakpoints
> 0)
3579 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3580 if (nr_printable_breakpoints
> 0)
3582 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3583 if (nr_printable_breakpoints
> 0)
3585 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3588 if (nr_printable_breakpoints
> 0)
3590 if (TARGET_ADDR_BIT
<= 32)
3591 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3593 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3595 if (nr_printable_breakpoints
> 0)
3597 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3598 ui_out_table_body (uiout
);
3599 if (nr_printable_breakpoints
> 0)
3600 annotate_breakpoints_table ();
3604 || bnum
== b
->number
)
3606 /* We only print out user settable breakpoints unless the
3608 if (allflag
|| user_settable_breakpoint (b
))
3609 print_one_breakpoint (b
, &last_addr
);
3612 do_cleanups (bkpttbl_chain
);
3614 if (nr_printable_breakpoints
== 0)
3617 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3619 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3624 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3625 that a comparison of an unsigned with -1 is always false. */
3626 if (last_addr
!= (CORE_ADDR
) -1)
3627 set_next_address (last_addr
);
3630 /* FIXME? Should this be moved up so that it is only called when
3631 there have been breakpoints? */
3632 annotate_breakpoints_table_end ();
3637 breakpoints_info (char *bnum_exp
, int from_tty
)
3642 bnum
= parse_and_eval_long (bnum_exp
);
3644 breakpoint_1 (bnum
, 0);
3649 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3654 bnum
= parse_and_eval_long (bnum_exp
);
3656 breakpoint_1 (bnum
, 1);
3659 /* Print a message describing any breakpoints set at PC. */
3662 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3664 register int others
= 0;
3665 register struct breakpoint
*b
;
3668 if (b
->address
== pc
) /* address match / overlay match */
3669 if (!overlay_debugging
|| b
->section
== section
)
3673 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3675 if (b
->address
== pc
) /* address match / overlay match */
3676 if (!overlay_debugging
|| b
->section
== section
)
3679 printf_filtered ("%d%s%s ",
3681 ((b
->enable_state
== bp_disabled
||
3682 b
->enable_state
== bp_shlib_disabled
||
3683 b
->enable_state
== bp_call_disabled
)
3685 : b
->enable_state
== bp_permanent
3689 : ((others
== 1) ? " and" : ""));
3691 printf_filtered ("also set at pc ");
3692 print_address_numeric (pc
, 1, gdb_stdout
);
3693 printf_filtered (".\n");
3697 /* Set the default place to put a breakpoint
3698 for the `break' command with no arguments. */
3701 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3704 default_breakpoint_valid
= valid
;
3705 default_breakpoint_address
= addr
;
3706 default_breakpoint_symtab
= symtab
;
3707 default_breakpoint_line
= line
;
3710 /* Return true iff it is meaningful to use the address member of
3711 BPT. For some breakpoint types, the address member is irrelevant
3712 and it makes no sense to attempt to compare it to other addresses
3713 (or use it for any other purpose either).
3715 More specifically, each of the following breakpoint types will always
3716 have a zero valued address and we don't want check_duplicates() to mark
3717 breakpoints of any of these types to be a duplicate of an actual
3718 breakpoint at address zero:
3721 bp_hardware_watchpoint
3723 bp_access_watchpoint
3730 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3732 enum bptype type
= bpt
->type
;
3734 return (type
!= bp_watchpoint
3735 && type
!= bp_hardware_watchpoint
3736 && type
!= bp_read_watchpoint
3737 && type
!= bp_access_watchpoint
3738 && type
!= bp_catch_exec
3739 && type
!= bp_longjmp_resume
3740 && type
!= bp_catch_fork
3741 && type
!= bp_catch_vfork
);
3744 /* Rescan breakpoints at the same address and section as BPT,
3745 marking the first one as "first" and any others as "duplicates".
3746 This is so that the bpt instruction is only inserted once.
3747 If we have a permanent breakpoint at the same place as BPT, make
3748 that one the official one, and the rest as duplicates. */
3751 check_duplicates (struct breakpoint
*bpt
)
3753 register struct breakpoint
*b
;
3754 register int count
= 0;
3755 struct breakpoint
*perm_bp
= 0;
3756 CORE_ADDR address
= bpt
->address
;
3757 asection
*section
= bpt
->section
;
3759 if (! breakpoint_address_is_meaningful (bpt
))
3763 if (b
->enable_state
!= bp_disabled
3764 && b
->enable_state
!= bp_shlib_disabled
3765 && b
->enable_state
!= bp_call_disabled
3766 && b
->address
== address
/* address / overlay match */
3767 && (!overlay_debugging
|| b
->section
== section
)
3768 && breakpoint_address_is_meaningful (b
))
3770 /* Have we found a permanent breakpoint? */
3771 if (b
->enable_state
== bp_permanent
)
3778 b
->duplicate
= count
> 1;
3781 /* If we found a permanent breakpoint at this address, go over the
3782 list again and declare all the other breakpoints there to be the
3786 perm_bp
->duplicate
= 0;
3788 /* Permanent breakpoint should always be inserted. */
3789 if (! perm_bp
->inserted
)
3790 internal_error (__FILE__
, __LINE__
,
3791 "allegedly permanent breakpoint is not "
3792 "actually inserted");
3798 internal_error (__FILE__
, __LINE__
,
3799 "another breakpoint was inserted on top of "
3800 "a permanent breakpoint");
3802 if (b
->enable_state
!= bp_disabled
3803 && b
->enable_state
!= bp_shlib_disabled
3804 && b
->enable_state
!= bp_call_disabled
3805 && b
->address
== address
/* address / overlay match */
3806 && (!overlay_debugging
|| b
->section
== section
)
3807 && breakpoint_address_is_meaningful (b
))
3813 /* set_raw_breakpoint() is a low level routine for allocating and
3814 partially initializing a breakpoint of type BPTYPE. The newly
3815 created breakpoint's address, section, source file name, and line
3816 number are provided by SAL. The newly created and partially
3817 initialized breakpoint is added to the breakpoint chain and
3818 is also returned as the value of this function.
3820 It is expected that the caller will complete the initialization of
3821 the newly created breakpoint struct as well as output any status
3822 information regarding the creation of a new breakpoint. In
3823 particular, set_raw_breakpoint() does NOT set the breakpoint
3824 number! Care should be taken to not allow an error() to occur
3825 prior to completing the initialization of the breakpoint. If this
3826 should happen, a bogus breakpoint will be left on the chain. */
3829 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
3831 register struct breakpoint
*b
, *b1
;
3833 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
3834 memset (b
, 0, sizeof (*b
));
3835 b
->address
= sal
.pc
;
3836 if (sal
.symtab
== NULL
)
3837 b
->source_file
= NULL
;
3839 b
->source_file
= savestring (sal
.symtab
->filename
,
3840 strlen (sal
.symtab
->filename
));
3841 b
->section
= sal
.section
;
3843 b
->language
= current_language
->la_language
;
3844 b
->input_radix
= input_radix
;
3846 b
->line_number
= sal
.line
;
3847 b
->enable_state
= bp_enabled
;
3850 b
->ignore_count
= 0;
3852 b
->frame_id
= null_frame_id
;
3853 b
->dll_pathname
= NULL
;
3854 b
->triggered_dll_pathname
= NULL
;
3855 b
->forked_inferior_pid
= 0;
3856 b
->exec_pathname
= NULL
;
3858 /* Add this breakpoint to the end of the chain
3859 so that a list of breakpoints will come out in order
3860 of increasing numbers. */
3862 b1
= breakpoint_chain
;
3864 breakpoint_chain
= b
;
3872 check_duplicates (b
);
3873 breakpoints_changed ();
3879 /* Note that the breakpoint object B describes a permanent breakpoint
3880 instruction, hard-wired into the inferior's code. */
3882 make_breakpoint_permanent (struct breakpoint
*b
)
3884 b
->enable_state
= bp_permanent
;
3886 /* By definition, permanent breakpoints are already present in the code. */
3890 static struct breakpoint
*
3891 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
3893 static int internal_breakpoint_number
= -1;
3894 struct symtab_and_line sal
;
3895 struct breakpoint
*b
;
3897 init_sal (&sal
); /* initialize to zeroes */
3900 sal
.section
= find_pc_overlay (sal
.pc
);
3902 b
= set_raw_breakpoint (sal
, type
);
3903 b
->number
= internal_breakpoint_number
--;
3904 b
->disposition
= disp_donttouch
;
3911 create_longjmp_breakpoint (char *func_name
)
3913 struct breakpoint
*b
;
3914 struct minimal_symbol
*m
;
3916 if (func_name
== NULL
)
3917 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
3920 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
, NULL
)) == NULL
)
3923 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
3926 b
->enable_state
= bp_disabled
;
3929 b
->addr_string
= xstrdup (func_name
);
3932 /* Call this routine when stepping and nexting to enable a breakpoint
3933 if we do a longjmp(). When we hit that breakpoint, call
3934 set_longjmp_resume_breakpoint() to figure out where we are going. */
3937 enable_longjmp_breakpoint (void)
3939 register struct breakpoint
*b
;
3942 if (b
->type
== bp_longjmp
)
3944 b
->enable_state
= bp_enabled
;
3945 check_duplicates (b
);
3950 disable_longjmp_breakpoint (void)
3952 register struct breakpoint
*b
;
3955 if (b
->type
== bp_longjmp
3956 || b
->type
== bp_longjmp_resume
)
3958 b
->enable_state
= bp_disabled
;
3959 check_duplicates (b
);
3964 create_overlay_event_breakpoint (char *func_name
)
3966 struct breakpoint
*b
;
3967 struct minimal_symbol
*m
;
3969 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
, NULL
)) == NULL
)
3972 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
3974 b
->addr_string
= xstrdup (func_name
);
3976 if (overlay_debugging
== ovly_auto
)
3978 b
->enable_state
= bp_enabled
;
3979 overlay_events_enabled
= 1;
3983 b
->enable_state
= bp_disabled
;
3984 overlay_events_enabled
= 0;
3989 enable_overlay_breakpoints (void)
3991 register struct breakpoint
*b
;
3994 if (b
->type
== bp_overlay_event
)
3996 b
->enable_state
= bp_enabled
;
3997 check_duplicates (b
);
3998 overlay_events_enabled
= 1;
4003 disable_overlay_breakpoints (void)
4005 register struct breakpoint
*b
;
4008 if (b
->type
== bp_overlay_event
)
4010 b
->enable_state
= bp_disabled
;
4011 check_duplicates (b
);
4012 overlay_events_enabled
= 0;
4017 create_thread_event_breakpoint (CORE_ADDR address
)
4019 struct breakpoint
*b
;
4021 b
= create_internal_breakpoint (address
, bp_thread_event
);
4023 b
->enable_state
= bp_enabled
;
4024 /* addr_string has to be used or breakpoint_re_set will delete me. */
4025 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->address
));
4031 remove_thread_event_breakpoints (void)
4033 struct breakpoint
*b
, *temp
;
4035 ALL_BREAKPOINTS_SAFE (b
, temp
)
4036 if (b
->type
== bp_thread_event
)
4037 delete_breakpoint (b
);
4042 remove_solib_event_breakpoints (void)
4044 register struct breakpoint
*b
, *temp
;
4046 ALL_BREAKPOINTS_SAFE (b
, temp
)
4047 if (b
->type
== bp_shlib_event
)
4048 delete_breakpoint (b
);
4052 create_solib_event_breakpoint (CORE_ADDR address
)
4054 struct breakpoint
*b
;
4056 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4060 /* Disable any breakpoints that are on code in shared libraries. Only
4061 apply to enabled breakpoints, disabled ones can just stay disabled. */
4064 disable_breakpoints_in_shlibs (int silent
)
4066 struct breakpoint
*b
;
4067 int disabled_shlib_breaks
= 0;
4069 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4072 #if defined (PC_SOLIB)
4073 if (((b
->type
== bp_breakpoint
) ||
4074 (b
->type
== bp_hardware_breakpoint
)) &&
4075 b
->enable_state
== bp_enabled
&&
4077 PC_SOLIB (b
->address
))
4079 b
->enable_state
= bp_shlib_disabled
;
4082 if (!disabled_shlib_breaks
)
4084 target_terminal_ours_for_output ();
4085 warning ("Temporarily disabling shared library breakpoints:");
4087 disabled_shlib_breaks
= 1;
4088 warning ("breakpoint #%d ", b
->number
);
4095 /* Try to reenable any breakpoints in shared libraries. */
4097 re_enable_breakpoints_in_shlibs (void)
4099 struct breakpoint
*b
;
4102 if (b
->enable_state
== bp_shlib_disabled
)
4106 /* Do not reenable the breakpoint if the shared library
4107 is still not mapped in. */
4108 if (target_read_memory (b
->address
, buf
, 1) == 0)
4109 b
->enable_state
= bp_enabled
;
4116 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4117 char *cond_string
, enum bptype bp_kind
)
4119 struct breakpoint
*b
;
4120 struct symtabs_and_lines sals
;
4121 struct cleanup
*old_chain
;
4122 struct cleanup
*canonical_strings_chain
= NULL
;
4123 char *addr_start
= hookname
;
4124 char *addr_end
= NULL
;
4125 char **canonical
= (char **) NULL
;
4126 int thread
= -1; /* All threads. */
4128 /* Set a breakpoint on the specified hook. */
4129 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
, 0, &canonical
);
4130 addr_end
= hookname
;
4132 if (sals
.nelts
== 0)
4134 warning ("Unable to set a breakpoint on dynamic linker callback.");
4135 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4136 warning ("GDB will be unable to track shl_load/shl_unload calls");
4139 if (sals
.nelts
!= 1)
4141 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4142 warning ("GDB will be unable to track shl_load/shl_unload calls");
4146 /* Make sure that all storage allocated in decode_line_1 gets freed
4147 in case the following errors out. */
4148 old_chain
= make_cleanup (xfree
, sals
.sals
);
4149 if (canonical
!= (char **) NULL
)
4151 make_cleanup (xfree
, canonical
);
4152 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4153 if (canonical
[0] != NULL
)
4154 make_cleanup (xfree
, canonical
[0]);
4157 resolve_sal_pc (&sals
.sals
[0]);
4159 /* Remove the canonical strings from the cleanup, they are needed below. */
4160 if (canonical
!= (char **) NULL
)
4161 discard_cleanups (canonical_strings_chain
);
4163 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4164 set_breakpoint_count (breakpoint_count
+ 1);
4165 b
->number
= breakpoint_count
;
4167 b
->cond_string
= (cond_string
== NULL
) ?
4168 NULL
: savestring (cond_string
, strlen (cond_string
));
4171 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4172 b
->addr_string
= canonical
[0];
4173 else if (addr_start
)
4174 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4176 b
->enable_state
= bp_enabled
;
4177 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4179 if (dll_pathname
== NULL
)
4180 b
->dll_pathname
= NULL
;
4183 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4184 strcpy (b
->dll_pathname
, dll_pathname
);
4188 do_cleanups (old_chain
);
4192 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4193 char *dll_pathname
, char *cond_string
)
4195 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4196 cond_string
, bp_catch_load
);
4200 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4201 char *dll_pathname
, char *cond_string
)
4203 solib_load_unload_1 (hookname
,tempflag
, dll_pathname
,
4204 cond_string
, bp_catch_unload
);
4208 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4209 enum bptype bp_kind
)
4211 struct symtab_and_line sal
;
4212 struct breakpoint
*b
;
4213 int thread
= -1; /* All threads. */
4220 b
= set_raw_breakpoint (sal
, bp_kind
);
4221 set_breakpoint_count (breakpoint_count
+ 1);
4222 b
->number
= breakpoint_count
;
4224 b
->cond_string
= (cond_string
== NULL
) ?
4225 NULL
: savestring (cond_string
, strlen (cond_string
));
4227 b
->addr_string
= NULL
;
4228 b
->enable_state
= bp_enabled
;
4229 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4230 b
->forked_inferior_pid
= 0;
4236 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4238 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4242 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4244 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4248 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4250 struct symtab_and_line sal
;
4251 struct breakpoint
*b
;
4252 int thread
= -1; /* All threads. */
4259 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4260 set_breakpoint_count (breakpoint_count
+ 1);
4261 b
->number
= breakpoint_count
;
4263 b
->cond_string
= (cond_string
== NULL
) ?
4264 NULL
: savestring (cond_string
, strlen (cond_string
));
4266 b
->addr_string
= NULL
;
4267 b
->enable_state
= bp_enabled
;
4268 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4274 hw_breakpoint_used_count (void)
4276 register struct breakpoint
*b
;
4281 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4289 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4291 register struct breakpoint
*b
;
4294 *other_type_used
= 0;
4297 if (b
->enable_state
== bp_enabled
)
4299 if (b
->type
== type
)
4301 else if ((b
->type
== bp_hardware_watchpoint
||
4302 b
->type
== bp_read_watchpoint
||
4303 b
->type
== bp_access_watchpoint
)
4304 && b
->enable_state
== bp_enabled
)
4305 *other_type_used
= 1;
4311 /* Call this after hitting the longjmp() breakpoint. Use this to set
4312 a new breakpoint at the target of the jmp_buf.
4314 FIXME - This ought to be done by setting a temporary breakpoint
4315 that gets deleted automatically... */
4318 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4320 register struct breakpoint
*b
;
4323 if (b
->type
== bp_longjmp_resume
)
4326 b
->enable_state
= bp_enabled
;
4327 b
->frame_id
= frame_id
;
4328 check_duplicates (b
);
4334 disable_watchpoints_before_interactive_call_start (void)
4336 struct breakpoint
*b
;
4340 if (((b
->type
== bp_watchpoint
)
4341 || (b
->type
== bp_hardware_watchpoint
)
4342 || (b
->type
== bp_read_watchpoint
)
4343 || (b
->type
== bp_access_watchpoint
)
4344 || ep_is_exception_catchpoint (b
))
4345 && (b
->enable_state
== bp_enabled
))
4347 b
->enable_state
= bp_call_disabled
;
4348 check_duplicates (b
);
4354 enable_watchpoints_after_interactive_call_stop (void)
4356 struct breakpoint
*b
;
4360 if (((b
->type
== bp_watchpoint
)
4361 || (b
->type
== bp_hardware_watchpoint
)
4362 || (b
->type
== bp_read_watchpoint
)
4363 || (b
->type
== bp_access_watchpoint
)
4364 || ep_is_exception_catchpoint (b
))
4365 && (b
->enable_state
== bp_call_disabled
))
4367 b
->enable_state
= bp_enabled
;
4368 check_duplicates (b
);
4374 /* Set a breakpoint that will evaporate an end of command
4375 at address specified by SAL.
4376 Restrict it to frame FRAME if FRAME is nonzero. */
4379 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4382 register struct breakpoint
*b
;
4383 b
= set_raw_breakpoint (sal
, type
);
4384 b
->enable_state
= bp_enabled
;
4385 b
->disposition
= disp_donttouch
;
4386 b
->frame_id
= frame_id
;
4388 /* If we're debugging a multi-threaded program, then we
4389 want momentary breakpoints to be active in only a
4390 single thread of control. */
4391 if (in_thread_list (inferior_ptid
))
4392 b
->thread
= pid_to_thread_id (inferior_ptid
);
4398 /* Tell the user we have just set a breakpoint B. */
4401 mention (struct breakpoint
*b
)
4404 struct cleanup
*old_chain
, *ui_out_chain
;
4405 struct ui_stream
*stb
;
4407 stb
= ui_out_stream_new (uiout
);
4408 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4410 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4411 watchpoint) other than breakpoint creation. It should be possible to
4412 clean this up and at the same time replace the random calls to
4413 breakpoint_changed with this hook, as has already been done for
4414 delete_breakpoint_hook and so on. */
4415 if (create_breakpoint_hook
)
4416 create_breakpoint_hook (b
);
4417 breakpoint_create_event (b
->number
);
4422 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4425 ui_out_text (uiout
, "Watchpoint ");
4426 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4427 ui_out_field_int (uiout
, "number", b
->number
);
4428 ui_out_text (uiout
, ": ");
4429 print_expression (b
->exp
, stb
->stream
);
4430 ui_out_field_stream (uiout
, "exp", stb
);
4431 do_cleanups (ui_out_chain
);
4433 case bp_hardware_watchpoint
:
4434 ui_out_text (uiout
, "Hardware watchpoint ");
4435 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4436 ui_out_field_int (uiout
, "number", b
->number
);
4437 ui_out_text (uiout
, ": ");
4438 print_expression (b
->exp
, stb
->stream
);
4439 ui_out_field_stream (uiout
, "exp", stb
);
4440 do_cleanups (ui_out_chain
);
4442 case bp_read_watchpoint
:
4443 ui_out_text (uiout
, "Hardware read watchpoint ");
4444 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4445 ui_out_field_int (uiout
, "number", b
->number
);
4446 ui_out_text (uiout
, ": ");
4447 print_expression (b
->exp
, stb
->stream
);
4448 ui_out_field_stream (uiout
, "exp", stb
);
4449 do_cleanups (ui_out_chain
);
4451 case bp_access_watchpoint
:
4452 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4453 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4454 ui_out_field_int (uiout
, "number", b
->number
);
4455 ui_out_text (uiout
, ": ");
4456 print_expression (b
->exp
, stb
->stream
);
4457 ui_out_field_stream (uiout
, "exp", stb
);
4458 do_cleanups (ui_out_chain
);
4461 if (ui_out_is_mi_like_p (uiout
))
4466 printf_filtered ("Breakpoint %d", b
->number
);
4469 case bp_hardware_breakpoint
:
4470 if (ui_out_is_mi_like_p (uiout
))
4475 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4479 case bp_catch_unload
:
4480 printf_filtered ("Catchpoint %d (%s %s)",
4482 (b
->type
== bp_catch_load
) ? "load" : "unload",
4483 (b
->dll_pathname
!= NULL
) ?
4484 b
->dll_pathname
: "<any library>");
4487 case bp_catch_vfork
:
4488 printf_filtered ("Catchpoint %d (%s)",
4490 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4493 printf_filtered ("Catchpoint %d (exec)",
4496 case bp_catch_catch
:
4497 case bp_catch_throw
:
4498 printf_filtered ("Catchpoint %d (%s)",
4500 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4506 case bp_longjmp_resume
:
4507 case bp_step_resume
:
4508 case bp_through_sigtramp
:
4510 case bp_watchpoint_scope
:
4511 case bp_shlib_event
:
4512 case bp_thread_event
:
4513 case bp_overlay_event
:
4518 if (addressprint
|| b
->source_file
== NULL
)
4520 printf_filtered (" at ");
4521 print_address_numeric (b
->address
, 1, gdb_stdout
);
4524 printf_filtered (": file %s, line %d.",
4525 b
->source_file
, b
->line_number
);
4527 do_cleanups (old_chain
);
4528 if (ui_out_is_mi_like_p (uiout
))
4530 printf_filtered ("\n");
4534 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4535 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4536 COND[i] and COND_STRING[i] values.
4538 NOTE: If the function succeeds, the caller is expected to cleanup
4539 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4540 array contents). If the function fails (error() is called), the
4541 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4542 COND and SALS arrays and each of those arrays contents. */
4545 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4546 struct expression
**cond
, char **cond_string
,
4547 enum bptype type
, enum bpdisp disposition
,
4548 int thread
, int ignore_count
, int from_tty
)
4550 if (type
== bp_hardware_breakpoint
)
4552 int i
= hw_breakpoint_used_count ();
4553 int target_resources_ok
=
4554 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4556 if (target_resources_ok
== 0)
4557 error ("No hardware breakpoint support in the target.");
4558 else if (target_resources_ok
< 0)
4559 error ("Hardware breakpoints used exceeds limit.");
4562 /* Now set all the breakpoints. */
4565 for (i
= 0; i
< sals
.nelts
; i
++)
4567 struct breakpoint
*b
;
4568 struct symtab_and_line sal
= sals
.sals
[i
];
4571 describe_other_breakpoints (sal
.pc
, sal
.section
);
4573 b
= set_raw_breakpoint (sal
, type
);
4574 set_breakpoint_count (breakpoint_count
+ 1);
4575 b
->number
= breakpoint_count
;
4579 b
->addr_string
= addr_string
[i
];
4581 /* addr_string has to be used or breakpoint_re_set will delete
4583 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->address
));
4584 b
->cond_string
= cond_string
[i
];
4585 b
->ignore_count
= ignore_count
;
4586 b
->enable_state
= bp_enabled
;
4587 b
->disposition
= disposition
;
4593 /* Parse ARG which is assumed to be a SAL specification possibly
4594 followed by conditionals. On return, SALS contains an array of SAL
4595 addresses found. ADDR_STRING contains a vector of (canonical)
4596 address strings. ARG points to the end of the SAL. */
4599 parse_breakpoint_sals (char **address
,
4600 struct symtabs_and_lines
*sals
,
4601 char ***addr_string
)
4603 char *addr_start
= *address
;
4604 *addr_string
= NULL
;
4605 /* If no arg given, or if first arg is 'if ', use the default
4607 if ((*address
) == NULL
4608 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4610 if (default_breakpoint_valid
)
4612 struct symtab_and_line sal
;
4613 init_sal (&sal
); /* initialize to zeroes */
4614 sals
->sals
= (struct symtab_and_line
*)
4615 xmalloc (sizeof (struct symtab_and_line
));
4616 sal
.pc
= default_breakpoint_address
;
4617 sal
.line
= default_breakpoint_line
;
4618 sal
.symtab
= default_breakpoint_symtab
;
4619 sal
.section
= find_pc_overlay (sal
.pc
);
4620 sals
->sals
[0] = sal
;
4624 error ("No default breakpoint address now.");
4628 /* Force almost all breakpoints to be in terms of the
4629 current_source_symtab (which is decode_line_1's default). This
4630 should produce the results we want almost all of the time while
4631 leaving default_breakpoint_* alone.
4632 ObjC: However, don't match an Objective-C method name which
4633 may have a '+' or '-' succeeded by a '[' */
4635 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
4637 if (default_breakpoint_valid
4639 || ((strchr ("+-", (*address
)[0]) != NULL
)
4640 && ((*address
)[1] != '['))))
4641 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
4642 default_breakpoint_line
, addr_string
);
4644 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0, addr_string
);
4646 /* For any SAL that didn't have a canonical string, fill one in. */
4647 if (sals
->nelts
> 0 && *addr_string
== NULL
)
4648 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
4649 if (addr_start
!= (*address
))
4652 for (i
= 0; i
< sals
->nelts
; i
++)
4654 /* Add the string if not present. */
4655 if ((*addr_string
)[i
] == NULL
)
4656 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
4662 /* Convert each SAL into a real PC. Verify that the PC can be
4663 inserted as a breakpoint. If it can't throw an error. */
4666 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
4670 for (i
= 0; i
< sals
->nelts
; i
++)
4672 resolve_sal_pc (&sals
->sals
[i
]);
4674 /* It's possible for the PC to be nonzero, but still an illegal
4675 value on some targets.
4677 For example, on HP-UX if you start gdb, and before running the
4678 inferior you try to set a breakpoint on a shared library function
4679 "foo" where the inferior doesn't call "foo" directly but does
4680 pass its address to another function call, then we do find a
4681 minimal symbol for the "foo", but it's address is invalid.
4682 (Appears to be an index into a table that the loader sets up
4683 when the inferior is run.)
4685 Give the target a chance to bless sals.sals[i].pc before we
4686 try to make a breakpoint for it. */
4687 if (PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
4689 if (address
== NULL
)
4690 error ("Cannot break without a running program.");
4692 error ("Cannot break on %s without a running program.",
4698 /* Set a breakpoint according to ARG (function, linenum or *address)
4699 flag: first bit : 0 non-temporary, 1 temporary.
4700 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4703 break_command_1 (char *arg
, int flag
, int from_tty
)
4705 int tempflag
, hardwareflag
;
4706 struct symtabs_and_lines sals
;
4707 register struct expression
**cond
= 0;
4708 /* Pointers in arg to the start, and one past the end, of the
4710 char **cond_string
= (char **) NULL
;
4711 char *addr_start
= arg
;
4713 struct cleanup
*old_chain
;
4714 struct cleanup
*breakpoint_chain
= NULL
;
4717 int ignore_count
= 0;
4719 hardwareflag
= flag
& BP_HARDWAREFLAG
;
4720 tempflag
= flag
& BP_TEMPFLAG
;
4725 parse_breakpoint_sals (&arg
, &sals
, &addr_string
);
4730 /* Create a chain of things that always need to be cleaned up. */
4731 old_chain
= make_cleanup (null_cleanup
, 0);
4733 /* Make sure that all storage allocated to SALS gets freed. */
4734 make_cleanup (xfree
, sals
.sals
);
4736 /* Cleanup the addr_string array but not its contents. */
4737 make_cleanup (xfree
, addr_string
);
4739 /* Allocate space for all the cond expressions. */
4740 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4741 make_cleanup (xfree
, cond
);
4743 /* Allocate space for all the cond strings. */
4744 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4745 make_cleanup (xfree
, cond_string
);
4747 /* ----------------------------- SNIP -----------------------------
4748 Anything added to the cleanup chain beyond this point is assumed
4749 to be part of a breakpoint. If the breakpoint create succeeds
4750 then the memory is not reclaimed. */
4751 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4753 /* Mark the contents of the addr_string for cleanup. These go on
4754 the breakpoint_chain and only occure if the breakpoint create
4756 for (i
= 0; i
< sals
.nelts
; i
++)
4758 if (addr_string
[i
] != NULL
)
4759 make_cleanup (xfree
, addr_string
[i
]);
4762 /* Resolve all line numbers to PC's and verify that the addresses
4763 are ok for the target. */
4764 breakpoint_sals_to_pc (&sals
, addr_start
);
4766 /* Verify that condition can be parsed, before setting any
4767 breakpoints. Allocate a separate condition expression for each
4769 thread
= -1; /* No specific thread yet */
4770 for (i
= 0; i
< sals
.nelts
; i
++)
4777 char *cond_start
= NULL
;
4778 char *cond_end
= NULL
;
4779 while (*tok
== ' ' || *tok
== '\t')
4784 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
4787 toklen
= end_tok
- tok
;
4789 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
4791 tok
= cond_start
= end_tok
+ 1;
4792 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4793 make_cleanup (xfree
, cond
[i
]);
4795 cond_string
[i
] = savestring (cond_start
, cond_end
- cond_start
);
4796 make_cleanup (xfree
, cond_string
[i
]);
4798 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
4804 thread
= strtol (tok
, &tok
, 0);
4806 error ("Junk after thread keyword.");
4807 if (!valid_thread_id (thread
))
4808 error ("Unknown thread %d\n", thread
);
4811 error ("Junk at end of arguments.");
4815 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
4816 hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
4817 tempflag
? disp_del
: disp_donttouch
,
4818 thread
, ignore_count
, from_tty
);
4822 warning ("Multiple breakpoints were set.");
4823 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
4825 /* That's it. Discard the cleanups for data inserted into the
4827 discard_cleanups (breakpoint_chain
);
4828 /* But cleanup everything else. */
4829 do_cleanups (old_chain
);
4832 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
4833 linenum or *address) with COND and IGNORE_COUNT. */
4835 struct captured_breakpoint_args
4846 do_captured_breakpoint (void *data
)
4848 struct captured_breakpoint_args
*args
= data
;
4849 struct symtabs_and_lines sals
;
4850 register struct expression
**cond
;
4851 struct cleanup
*old_chain
;
4852 struct cleanup
*breakpoint_chain
= NULL
;
4859 /* Parse the source and lines spec. Delay check that the expression
4860 didn't contain trailing garbage until after cleanups are in
4864 address_end
= args
->address
;
4866 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
);
4871 /* Create a chain of things at always need to be cleaned up. */
4872 old_chain
= make_cleanup (null_cleanup
, 0);
4874 /* Always have a addr_string array, even if it is empty. */
4875 make_cleanup (xfree
, addr_string
);
4877 /* Make sure that all storage allocated to SALS gets freed. */
4878 make_cleanup (xfree
, sals
.sals
);
4880 /* Allocate space for all the cond expressions. */
4881 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4882 make_cleanup (xfree
, cond
);
4884 /* Allocate space for all the cond strings. */
4885 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4886 make_cleanup (xfree
, cond_string
);
4888 /* ----------------------------- SNIP -----------------------------
4889 Anything added to the cleanup chain beyond this point is assumed
4890 to be part of a breakpoint. If the breakpoint create goes
4891 through then that memory is not cleaned up. */
4892 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4894 /* Mark the contents of the addr_string for cleanup. These go on
4895 the breakpoint_chain and only occure if the breakpoint create
4897 for (i
= 0; i
< sals
.nelts
; i
++)
4899 if (addr_string
[i
] != NULL
)
4900 make_cleanup (xfree
, addr_string
[i
]);
4903 /* Wait until now before checking for garbage at the end of the
4904 address. That way cleanups can take care of freeing any
4906 if (*address_end
!= '\0')
4907 error ("Garbage %s following breakpoint address", address_end
);
4909 /* Resolve all line numbers to PC's. */
4910 breakpoint_sals_to_pc (&sals
, args
->address
);
4912 /* Verify that conditions can be parsed, before setting any
4914 for (i
= 0; i
< sals
.nelts
; i
++)
4916 if (args
->condition
!= NULL
)
4918 char *tok
= args
->condition
;
4919 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4921 error ("Garbage %s follows condition", tok
);
4922 make_cleanup (xfree
, cond
[i
]);
4923 cond_string
[i
] = xstrdup (args
->condition
);
4927 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
4928 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
4929 args
->tempflag
? disp_del
: disp_donttouch
,
4930 args
->thread
, args
->ignore_count
, 0/*from-tty*/);
4932 /* That's it. Discard the cleanups for data inserted into the
4934 discard_cleanups (breakpoint_chain
);
4935 /* But cleanup everything else. */
4936 do_cleanups (old_chain
);
4941 gdb_breakpoint (char *address
, char *condition
,
4942 int hardwareflag
, int tempflag
,
4943 int thread
, int ignore_count
)
4945 struct captured_breakpoint_args args
;
4946 args
.address
= address
;
4947 args
.condition
= condition
;
4948 args
.hardwareflag
= hardwareflag
;
4949 args
.tempflag
= tempflag
;
4950 args
.thread
= thread
;
4951 args
.ignore_count
= ignore_count
;
4952 return catch_errors (do_captured_breakpoint
, &args
,
4953 NULL
, RETURN_MASK_ALL
);
4958 break_at_finish_at_depth_command_1 (char *arg
, int flag
, int from_tty
)
4960 struct frame_info
*frame
;
4961 CORE_ADDR low
, high
, selected_pc
= 0;
4962 char *extra_args
= NULL
;
4965 int extra_args_len
= 0, if_arg
= 0;
4968 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
4971 if (default_breakpoint_valid
)
4973 if (deprecated_selected_frame
)
4975 selected_pc
= get_frame_pc (deprecated_selected_frame
);
4980 error ("No selected frame.");
4983 error ("No default breakpoint address now.");
4987 extra_args
= strchr (arg
, ' ');
4991 extra_args_len
= strlen (extra_args
);
4992 level_arg
= (char *) xmalloc (extra_args
- arg
);
4993 strncpy (level_arg
, arg
, extra_args
- arg
- 1);
4994 level_arg
[extra_args
- arg
- 1] = '\0';
4998 level_arg
= (char *) xmalloc (strlen (arg
) + 1);
4999 strcpy (level_arg
, arg
);
5002 frame
= parse_frame_specification (level_arg
);
5004 selected_pc
= get_frame_pc (frame
);
5011 extra_args_len
= strlen (arg
);
5016 if (find_pc_partial_function (selected_pc
, (char **) NULL
, &low
, &high
))
5018 addr_string
= (char *) xmalloc (26 + extra_args_len
);
5020 sprintf (addr_string
, "*0x%s %s", paddr_nz (high
), extra_args
);
5022 sprintf (addr_string
, "*0x%s", paddr_nz (high
));
5023 break_command_1 (addr_string
, flag
, from_tty
);
5024 xfree (addr_string
);
5027 error ("No function contains the specified address");
5030 error ("Unable to set breakpoint at procedure exit");
5035 break_at_finish_command_1 (char *arg
, int flag
, int from_tty
)
5037 char *addr_string
, *break_string
, *beg_addr_string
;
5038 CORE_ADDR low
, high
;
5039 struct symtabs_and_lines sals
;
5040 struct symtab_and_line sal
;
5041 struct cleanup
*old_chain
;
5042 char *extra_args
= NULL
;
5043 int extra_args_len
= 0;
5047 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5049 if (default_breakpoint_valid
)
5051 if (deprecated_selected_frame
)
5053 addr_string
= (char *) xmalloc (15);
5054 sprintf (addr_string
, "*0x%s",
5055 paddr_nz (get_frame_pc (deprecated_selected_frame
)));
5060 error ("No selected frame.");
5063 error ("No default breakpoint address now.");
5067 addr_string
= (char *) xmalloc (strlen (arg
) + 1);
5068 strcpy (addr_string
, arg
);
5074 extra_args_len
= strlen (arg
);
5078 /* get the stuff after the function name or address */
5079 extra_args
= strchr (arg
, ' ');
5083 extra_args_len
= strlen (extra_args
);
5090 beg_addr_string
= addr_string
;
5091 sals
= decode_line_1 (&addr_string
, 1, (struct symtab
*) NULL
, 0,
5094 xfree (beg_addr_string
);
5095 old_chain
= make_cleanup (xfree
, sals
.sals
);
5096 for (i
= 0; (i
< sals
.nelts
); i
++)
5099 if (find_pc_partial_function (sal
.pc
, (char **) NULL
, &low
, &high
))
5101 break_string
= (char *) xmalloc (extra_args_len
+ 26);
5103 sprintf (break_string
, "*0x%s %s", paddr_nz (high
), extra_args
);
5105 sprintf (break_string
, "*0x%s", paddr_nz (high
));
5106 break_command_1 (break_string
, flag
, from_tty
);
5107 xfree (break_string
);
5110 error ("No function contains the specified address");
5114 warning ("Multiple breakpoints were set.\n");
5115 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5117 do_cleanups (old_chain
);
5121 /* Helper function for break_command_1 and disassemble_command. */
5124 resolve_sal_pc (struct symtab_and_line
*sal
)
5128 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5130 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5131 error ("No line %d in file \"%s\".",
5132 sal
->line
, sal
->symtab
->filename
);
5136 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5138 struct blockvector
*bv
;
5143 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5146 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5147 sym
= block_function (b
);
5150 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5151 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5155 /* It really is worthwhile to have the section, so we'll just
5156 have to look harder. This case can be executed if we have
5157 line numbers but no functions (as can happen in assembly
5160 struct minimal_symbol
*msym
;
5162 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5164 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5171 break_command (char *arg
, int from_tty
)
5173 break_command_1 (arg
, 0, from_tty
);
5177 break_at_finish_command (char *arg
, int from_tty
)
5179 break_at_finish_command_1 (arg
, 0, from_tty
);
5183 break_at_finish_at_depth_command (char *arg
, int from_tty
)
5185 break_at_finish_at_depth_command_1 (arg
, 0, from_tty
);
5189 tbreak_command (char *arg
, int from_tty
)
5191 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5195 tbreak_at_finish_command (char *arg
, int from_tty
)
5197 break_at_finish_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5201 hbreak_command (char *arg
, int from_tty
)
5203 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5207 thbreak_command (char *arg
, int from_tty
)
5209 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5213 stop_command (char *arg
, int from_tty
)
5215 printf_filtered ("Specify the type of breakpoint to set.\n\
5216 Usage: stop in <function | address>\n\
5221 stopin_command (char *arg
, int from_tty
)
5225 if (arg
== (char *) NULL
)
5227 else if (*arg
!= '*')
5232 /* look for a ':'. If this is a line number specification, then
5233 say it is bad, otherwise, it should be an address or
5234 function/method name */
5235 while (*argptr
&& !hasColon
)
5237 hasColon
= (*argptr
== ':');
5242 badInput
= (*argptr
!= ':'); /* Not a class::method */
5244 badInput
= isdigit (*arg
); /* a simple line number */
5248 printf_filtered ("Usage: stop in <function | address>\n");
5250 break_command_1 (arg
, 0, from_tty
);
5254 stopat_command (char *arg
, int from_tty
)
5258 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5265 /* look for a ':'. If there is a '::' then get out, otherwise
5266 it is probably a line number. */
5267 while (*argptr
&& !hasColon
)
5269 hasColon
= (*argptr
== ':');
5274 badInput
= (*argptr
== ':'); /* we have class::method */
5276 badInput
= !isdigit (*arg
); /* not a line number */
5280 printf_filtered ("Usage: stop at <line>\n");
5282 break_command_1 (arg
, 0, from_tty
);
5286 /* accessflag: hw_write: watch write,
5287 hw_read: watch read,
5288 hw_access: watch access (read or write) */
5290 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5292 struct breakpoint
*b
;
5293 struct symtab_and_line sal
;
5294 struct expression
*exp
;
5295 struct block
*exp_valid_block
;
5296 struct value
*val
, *mark
;
5297 struct frame_info
*frame
;
5298 struct frame_info
*prev_frame
= NULL
;
5299 char *exp_start
= NULL
;
5300 char *exp_end
= NULL
;
5301 char *tok
, *end_tok
;
5303 char *cond_start
= NULL
;
5304 char *cond_end
= NULL
;
5305 struct expression
*cond
= NULL
;
5306 int i
, other_type_used
, target_resources_ok
= 0;
5307 enum bptype bp_type
;
5310 init_sal (&sal
); /* initialize to zeroes */
5312 /* Parse arguments. */
5313 innermost_block
= NULL
;
5315 exp
= parse_exp_1 (&arg
, 0, 0);
5317 exp_valid_block
= innermost_block
;
5318 mark
= value_mark ();
5319 val
= evaluate_expression (exp
);
5320 release_value (val
);
5321 if (VALUE_LAZY (val
))
5322 value_fetch_lazy (val
);
5325 while (*tok
== ' ' || *tok
== '\t')
5329 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5332 toklen
= end_tok
- tok
;
5333 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5335 tok
= cond_start
= end_tok
+ 1;
5336 cond
= parse_exp_1 (&tok
, 0, 0);
5340 error ("Junk at end of command.");
5342 if (accessflag
== hw_read
)
5343 bp_type
= bp_read_watchpoint
;
5344 else if (accessflag
== hw_access
)
5345 bp_type
= bp_access_watchpoint
;
5347 bp_type
= bp_hardware_watchpoint
;
5349 mem_cnt
= can_use_hardware_watchpoint (val
);
5350 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5351 error ("Expression cannot be implemented with read/access watchpoint.");
5354 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5355 target_resources_ok
=
5356 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5358 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5359 error ("Target does not support this type of hardware watchpoint.");
5361 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5362 error ("Target can only support one kind of HW watchpoint at a time.");
5365 #if defined(HPUXHPPA)
5366 /* On HP-UX if you set a h/w
5367 watchpoint before the "run" command, the inferior dies with a e.g.,
5368 SIGILL once you start it. I initially believed this was due to a
5369 bad interaction between page protection traps and the initial
5370 startup sequence by the dynamic linker.
5372 However, I tried avoiding that by having HP-UX's implementation of
5373 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5374 yet, which forced slow watches before a "run" or "attach", and it
5375 still fails somewhere in the startup code.
5377 Until I figure out what's happening, I'm disallowing watches altogether
5378 before the "run" or "attach" command. We'll tell the user they must
5379 set watches after getting the program started. */
5380 if (!target_has_execution
)
5382 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5385 #endif /* HPUXHPPA */
5387 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5388 watchpoint could not be set. */
5389 if (!mem_cnt
|| target_resources_ok
<= 0)
5390 bp_type
= bp_watchpoint
;
5392 /* Now set up the breakpoint. */
5393 b
= set_raw_breakpoint (sal
, bp_type
);
5394 set_breakpoint_count (breakpoint_count
+ 1);
5395 b
->number
= breakpoint_count
;
5396 b
->disposition
= disp_donttouch
;
5398 b
->exp_valid_block
= exp_valid_block
;
5399 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5403 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5407 frame
= block_innermost_frame (exp_valid_block
);
5410 prev_frame
= get_prev_frame (frame
);
5411 b
->watchpoint_frame
= get_frame_id (frame
);
5415 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5418 /* If the expression is "local", then set up a "watchpoint scope"
5419 breakpoint at the point where we've left the scope of the watchpoint
5421 if (innermost_block
)
5425 struct breakpoint
*scope_breakpoint
;
5426 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5427 bp_watchpoint_scope
);
5429 scope_breakpoint
->enable_state
= bp_enabled
;
5431 /* Automatically delete the breakpoint when it hits. */
5432 scope_breakpoint
->disposition
= disp_del
;
5434 /* Only break in the proper frame (help with recursion). */
5435 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5437 /* Set the address at which we will stop. */
5438 scope_breakpoint
->address
= get_frame_pc (prev_frame
);
5440 /* The scope breakpoint is related to the watchpoint. We
5441 will need to act on them together. */
5442 b
->related_breakpoint
= scope_breakpoint
;
5445 value_free_to_mark (mark
);
5449 /* Return count of locations need to be watched and can be handled
5450 in hardware. If the watchpoint can not be handled
5451 in hardware return zero. */
5453 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5454 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5455 ((BYTE_SIZE) <= (REGISTER_SIZE))
5458 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5459 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5460 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5464 can_use_hardware_watchpoint (struct value
*v
)
5466 int found_memory_cnt
= 0;
5467 struct value
*head
= v
;
5469 /* Did the user specifically forbid us to use hardware watchpoints? */
5470 if (!can_use_hw_watchpoints
)
5473 /* Make sure that the value of the expression depends only upon
5474 memory contents, and values computed from them within GDB. If we
5475 find any register references or function calls, we can't use a
5476 hardware watchpoint.
5478 The idea here is that evaluating an expression generates a series
5479 of values, one holding the value of every subexpression. (The
5480 expression a*b+c has five subexpressions: a, b, a*b, c, and
5481 a*b+c.) GDB's values hold almost enough information to establish
5482 the criteria given above --- they identify memory lvalues,
5483 register lvalues, computed values, etcetera. So we can evaluate
5484 the expression, and then scan the chain of values that leaves
5485 behind to decide whether we can detect any possible change to the
5486 expression's final value using only hardware watchpoints.
5488 However, I don't think that the values returned by inferior
5489 function calls are special in any way. So this function may not
5490 notice that an expression involving an inferior function call
5491 can't be watched with hardware watchpoints. FIXME. */
5492 for (; v
; v
= v
->next
)
5494 if (VALUE_LVAL (v
) == lval_memory
)
5497 /* A lazy memory lvalue is one that GDB never needed to fetch;
5498 we either just used its address (e.g., `a' in `a.b') or
5499 we never needed it at all (e.g., `a' in `a,b'). */
5503 /* Ahh, memory we actually used! Check if we can cover
5504 it with hardware watchpoints. */
5505 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
5507 /* We only watch structs and arrays if user asked for it
5508 explicitly, never if they just happen to appear in a
5509 middle of some value chain. */
5511 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5512 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5514 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
5515 int len
= TYPE_LENGTH (VALUE_TYPE (v
));
5517 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5524 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
5525 return 0; /* ??? What does this represent? */
5526 else if (v
->lval
== lval_register
)
5527 return 0; /* cannot watch a register with a HW watchpoint */
5530 /* The expression itself looks suitable for using a hardware
5531 watchpoint, but give the target machine a chance to reject it. */
5532 return found_memory_cnt
;
5536 watch_command_wrapper (char *arg
, int from_tty
)
5538 watch_command (arg
, from_tty
);
5542 watch_command (char *arg
, int from_tty
)
5544 watch_command_1 (arg
, hw_write
, from_tty
);
5548 rwatch_command_wrapper (char *arg
, int from_tty
)
5550 rwatch_command (arg
, from_tty
);
5554 rwatch_command (char *arg
, int from_tty
)
5556 watch_command_1 (arg
, hw_read
, from_tty
);
5560 awatch_command_wrapper (char *arg
, int from_tty
)
5562 awatch_command (arg
, from_tty
);
5566 awatch_command (char *arg
, int from_tty
)
5568 watch_command_1 (arg
, hw_access
, from_tty
);
5572 /* Helper routines for the until_command routine in infcmd.c. Here
5573 because it uses the mechanisms of breakpoints. */
5575 /* This function is called by fetch_inferior_event via the
5576 cmd_continuation pointer, to complete the until command. It takes
5577 care of cleaning up the temporary breakpoints set up by the until
5580 until_break_command_continuation (struct continuation_arg
*arg
)
5582 struct cleanup
*cleanups
;
5584 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5585 do_exec_cleanups (cleanups
);
5590 until_break_command (char *arg
, int from_tty
, int anywhere
)
5592 struct symtabs_and_lines sals
;
5593 struct symtab_and_line sal
;
5594 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
5595 struct breakpoint
*breakpoint
;
5596 struct cleanup
*old_chain
;
5597 struct continuation_arg
*arg1
;
5600 clear_proceed_status ();
5602 /* Set a breakpoint where the user wants it and at return from
5605 if (default_breakpoint_valid
)
5606 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5607 default_breakpoint_line
, (char ***) NULL
);
5609 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5610 0, (char ***) NULL
);
5612 if (sals
.nelts
!= 1)
5613 error ("Couldn't get information on specified line.");
5616 xfree (sals
.sals
); /* malloc'd, so freed */
5619 error ("Junk at end of arguments.");
5621 resolve_sal_pc (&sal
);
5624 /* If the user told us to continue until a specified location,
5625 we don't specify a frame at which we need to stop. */
5626 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
5628 /* Otherwise, specify the current frame, because we want to stop only
5629 at the very same frame. */
5630 breakpoint
= set_momentary_breakpoint (sal
,
5631 get_frame_id (deprecated_selected_frame
),
5634 if (!event_loop_p
|| !target_can_async_p ())
5635 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5637 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5639 /* If we are running asynchronously, and the target supports async
5640 execution, we are not waiting for the target to stop, in the call
5641 tp proceed, below. This means that we cannot delete the
5642 brekpoints until the target has actually stopped. The only place
5643 where we get a chance to do that is in fetch_inferior_event, so
5644 we must set things up for that. */
5646 if (event_loop_p
&& target_can_async_p ())
5648 /* In this case the arg for the continuation is just the point
5649 in the exec_cleanups chain from where to start doing
5650 cleanups, because all the continuation does is the cleanups in
5651 the exec_cleanup_chain. */
5653 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5655 arg1
->data
.pointer
= old_chain
;
5657 add_continuation (until_break_command_continuation
, arg1
);
5660 /* Keep within the current frame, or in frames called by the current
5664 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
5665 sal
.pc
= get_frame_pc (prev_frame
);
5666 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
5668 if (!event_loop_p
|| !target_can_async_p ())
5669 make_cleanup_delete_breakpoint (breakpoint
);
5671 make_exec_cleanup_delete_breakpoint (breakpoint
);
5674 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
5675 /* Do the cleanups now, anly if we are not running asynchronously,
5676 of if we are, but the target is still synchronous. */
5677 if (!event_loop_p
|| !target_can_async_p ())
5678 do_cleanups (old_chain
);
5682 /* These aren't used; I don't konw what they were for. */
5683 /* Set a breakpoint at the catch clause for NAME. */
5685 catch_breakpoint (char *name
)
5690 disable_catch_breakpoint (void)
5695 delete_catch_breakpoint (void)
5700 enable_catch_breakpoint (void)
5706 ep_skip_leading_whitespace (char **s
)
5708 if ((s
== NULL
) || (*s
== NULL
))
5710 while (isspace (**s
))
5714 /* This function examines a string, and attempts to find a token
5715 that might be an event name in the leading characters. If a
5716 possible match is found, a pointer to the last character of
5717 the token is returned. Else, NULL is returned. */
5720 ep_find_event_name_end (char *arg
)
5723 char *event_name_end
= NULL
;
5725 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5729 /* We break out of the loop when we find a token delimiter.
5730 Basically, we're looking for alphanumerics and underscores;
5731 anything else delimites the token. */
5734 if (!isalnum (*s
) && (*s
!= '_'))
5740 return event_name_end
;
5744 /* This function attempts to parse an optional "if <cond>" clause
5745 from the arg string. If one is not found, it returns NULL.
5747 Else, it returns a pointer to the condition string. (It does not
5748 attempt to evaluate the string against a particular block.) And,
5749 it updates arg to point to the first character following the parsed
5750 if clause in the arg string. */
5753 ep_parse_optional_if_clause (char **arg
)
5757 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
5760 /* Skip the "if" keyword. */
5763 /* Skip any extra leading whitespace, and record the start of the
5764 condition string. */
5765 ep_skip_leading_whitespace (arg
);
5768 /* Assume that the condition occupies the remainder of the arg string. */
5769 (*arg
) += strlen (cond_string
);
5774 /* This function attempts to parse an optional filename from the arg
5775 string. If one is not found, it returns NULL.
5777 Else, it returns a pointer to the parsed filename. (This function
5778 makes no attempt to verify that a file of that name exists, or is
5779 accessible.) And, it updates arg to point to the first character
5780 following the parsed filename in the arg string.
5782 Note that clients needing to preserve the returned filename for
5783 future access should copy it to their own buffers. */
5785 ep_parse_optional_filename (char **arg
)
5787 static char filename
[1024];
5792 if ((*arg_p
== '\0') || isspace (*arg_p
))
5810 /* Commands to deal with catching events, such as signals, exceptions,
5811 process start/exit, etc. */
5815 catch_fork
, catch_vfork
5819 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
5820 static void catch_fork_command_1 (catch_fork_kind fork_kind
,
5821 char *arg
, int tempflag
, int from_tty
);
5824 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
5827 char *cond_string
= NULL
;
5829 ep_skip_leading_whitespace (&arg
);
5831 /* The allowed syntax is:
5833 catch [v]fork if <cond>
5835 First, check if there's an if clause. */
5836 cond_string
= ep_parse_optional_if_clause (&arg
);
5838 if ((*arg
!= '\0') && !isspace (*arg
))
5839 error ("Junk at end of arguments.");
5841 /* If this target supports it, create a fork or vfork catchpoint
5842 and enable reporting of such events. */
5846 create_fork_event_catchpoint (tempflag
, cond_string
);
5849 create_vfork_event_catchpoint (tempflag
, cond_string
);
5852 error ("unsupported or unknown fork kind; cannot catch it");
5858 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
5860 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
5862 char *cond_string
= NULL
;
5864 ep_skip_leading_whitespace (&arg
);
5866 /* The allowed syntax is:
5868 catch exec if <cond>
5870 First, check if there's an if clause. */
5871 cond_string
= ep_parse_optional_if_clause (&arg
);
5873 if ((*arg
!= '\0') && !isspace (*arg
))
5874 error ("Junk at end of arguments.");
5876 /* If this target supports it, create an exec catchpoint
5877 and enable reporting of such events. */
5878 create_exec_event_catchpoint (tempflag
, cond_string
);
5882 #if defined(SOLIB_ADD)
5884 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
5886 char *dll_pathname
= NULL
;
5887 char *cond_string
= NULL
;
5889 ep_skip_leading_whitespace (&arg
);
5891 /* The allowed syntax is:
5893 catch load if <cond>
5894 catch load <filename>
5895 catch load <filename> if <cond>
5897 The user is not allowed to specify the <filename> after an
5900 We'll ignore the pathological case of a file named "if".
5902 First, check if there's an if clause. If so, then there
5903 cannot be a filename. */
5904 cond_string
= ep_parse_optional_if_clause (&arg
);
5906 /* If there was an if clause, then there cannot be a filename.
5907 Else, there might be a filename and an if clause. */
5908 if (cond_string
== NULL
)
5910 dll_pathname
= ep_parse_optional_filename (&arg
);
5911 ep_skip_leading_whitespace (&arg
);
5912 cond_string
= ep_parse_optional_if_clause (&arg
);
5915 if ((*arg
!= '\0') && !isspace (*arg
))
5916 error ("Junk at end of arguments.");
5918 /* Create a load breakpoint that only triggers when a load of
5919 the specified dll (or any dll, if no pathname was specified)
5921 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
5922 dll_pathname
, cond_string
);
5926 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
5928 char *dll_pathname
= NULL
;
5929 char *cond_string
= NULL
;
5931 ep_skip_leading_whitespace (&arg
);
5933 /* The allowed syntax is:
5935 catch unload if <cond>
5936 catch unload <filename>
5937 catch unload <filename> if <cond>
5939 The user is not allowed to specify the <filename> after an
5942 We'll ignore the pathological case of a file named "if".
5944 First, check if there's an if clause. If so, then there
5945 cannot be a filename. */
5946 cond_string
= ep_parse_optional_if_clause (&arg
);
5948 /* If there was an if clause, then there cannot be a filename.
5949 Else, there might be a filename and an if clause. */
5950 if (cond_string
== NULL
)
5952 dll_pathname
= ep_parse_optional_filename (&arg
);
5953 ep_skip_leading_whitespace (&arg
);
5954 cond_string
= ep_parse_optional_if_clause (&arg
);
5957 if ((*arg
!= '\0') && !isspace (*arg
))
5958 error ("Junk at end of arguments.");
5960 /* Create an unload breakpoint that only triggers when an unload of
5961 the specified dll (or any dll, if no pathname was specified)
5963 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
5964 dll_pathname
, cond_string
);
5966 #endif /* SOLIB_ADD */
5968 /* Commands to deal with catching exceptions. */
5970 /* Set a breakpoint at the specified callback routine for an
5971 exception event callback */
5974 create_exception_catchpoint (int tempflag
, char *cond_string
,
5975 enum exception_event_kind ex_event
,
5976 struct symtab_and_line
*sal
)
5978 struct breakpoint
*b
;
5979 int thread
= -1; /* All threads. */
5982 if (!sal
) /* no exception support? */
5987 case EX_EVENT_THROW
:
5988 bptype
= bp_catch_throw
;
5990 case EX_EVENT_CATCH
:
5991 bptype
= bp_catch_catch
;
5993 default: /* error condition */
5994 error ("Internal error -- invalid catchpoint kind");
5997 b
= set_raw_breakpoint (*sal
, bptype
);
5998 set_breakpoint_count (breakpoint_count
+ 1);
5999 b
->number
= breakpoint_count
;
6001 b
->cond_string
= (cond_string
== NULL
) ?
6002 NULL
: savestring (cond_string
, strlen (cond_string
));
6004 b
->addr_string
= NULL
;
6005 b
->enable_state
= bp_enabled
;
6006 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6010 /* Deal with "catch catch" and "catch throw" commands */
6013 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6014 int tempflag
, int from_tty
)
6016 char *cond_string
= NULL
;
6017 struct symtab_and_line
*sal
= NULL
;
6019 ep_skip_leading_whitespace (&arg
);
6021 cond_string
= ep_parse_optional_if_clause (&arg
);
6023 if ((*arg
!= '\0') && !isspace (*arg
))
6024 error ("Junk at end of arguments.");
6026 if ((ex_event
!= EX_EVENT_THROW
) &&
6027 (ex_event
!= EX_EVENT_CATCH
))
6028 error ("Unsupported or unknown exception event; cannot catch it");
6030 /* See if we can find a callback routine */
6031 sal
= target_enable_exception_callback (ex_event
, 1);
6035 /* We have callbacks from the runtime system for exceptions.
6036 Set a breakpoint on the sal found, if no errors */
6037 if (sal
!= (struct symtab_and_line
*) -1)
6038 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6040 return; /* something went wrong with setting up callbacks */
6043 warning ("Unsupported with this platform/compiler combination.");
6046 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6047 inside a catch_errors */
6050 cover_target_enable_exception_callback (void *arg
)
6052 args_for_catchpoint_enable
*args
= arg
;
6053 struct symtab_and_line
*sal
;
6054 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6057 else if (sal
== (struct symtab_and_line
*) -1)
6060 return 1; /*is valid */
6064 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6067 /* The first argument may be an event name, such as "start" or "load".
6068 If so, then handle it as such. If it doesn't match an event name,
6069 then attempt to interpret it as an exception name. (This latter is
6070 the v4.16-and-earlier GDB meaning of the "catch" command.)
6072 First, try to find the bounds of what might be an event name. */
6073 char *arg1_start
= arg
;
6077 if (arg1_start
== NULL
)
6079 /* Old behaviour was to use pre-v-4.16 syntax */
6080 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6082 /* Now, this is not allowed */
6083 error ("Catch requires an event name.");
6086 arg1_end
= ep_find_event_name_end (arg1_start
);
6087 if (arg1_end
== NULL
)
6088 error ("catch requires an event");
6089 arg1_length
= arg1_end
+ 1 - arg1_start
;
6091 /* Try to match what we found against known event names. */
6092 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6094 error ("Catch of signal not yet implemented");
6096 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6098 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6099 tempflag
, from_tty
);
6101 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6103 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6104 tempflag
, from_tty
);
6106 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6108 error ("Catch of thread_start not yet implemented");
6110 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6112 error ("Catch of thread_exit not yet implemented");
6114 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6116 error ("Catch of thread_join not yet implemented");
6118 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6120 error ("Catch of start not yet implemented");
6122 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6124 error ("Catch of exit not yet implemented");
6126 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6128 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6129 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6131 error ("Catch of fork not yet implemented");
6134 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6136 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6137 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6139 error ("Catch of vfork not yet implemented");
6142 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6144 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6145 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6147 error ("Catch of exec not yet implemented");
6150 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6152 #if defined(SOLIB_ADD)
6153 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6155 error ("Catch of load not implemented");
6158 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6160 #if defined(SOLIB_ADD)
6161 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6163 error ("Catch of load not implemented");
6166 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6168 error ("Catch of stop not yet implemented");
6171 /* This doesn't appear to be an event name */
6175 /* Pre-v.4.16 behaviour was to treat the argument
6176 as the name of an exception */
6177 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6178 /* Now this is not allowed */
6179 error ("Unknown event kind specified for catch");
6184 /* Used by the gui, could be made a worker for other things. */
6187 set_breakpoint_sal (struct symtab_and_line sal
)
6189 struct breakpoint
*b
;
6190 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6191 set_breakpoint_count (breakpoint_count
+ 1);
6192 b
->number
= breakpoint_count
;
6199 /* These aren't used; I don't know what they were for. */
6200 /* Disable breakpoints on all catch clauses described in ARGS. */
6202 disable_catch (char *args
)
6204 /* Map the disable command to catch clauses described in ARGS. */
6207 /* Enable breakpoints on all catch clauses described in ARGS. */
6209 enable_catch (char *args
)
6211 /* Map the disable command to catch clauses described in ARGS. */
6214 /* Delete breakpoints on all catch clauses in the active scope. */
6216 delete_catch (char *args
)
6218 /* Map the delete command to catch clauses described in ARGS. */
6223 catch_command (char *arg
, int from_tty
)
6225 catch_command_1 (arg
, 0, from_tty
);
6230 tcatch_command (char *arg
, int from_tty
)
6232 catch_command_1 (arg
, 1, from_tty
);
6235 /* Delete breakpoints by address or line. */
6238 clear_command (char *arg
, int from_tty
)
6240 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6242 struct symtabs_and_lines sals
;
6243 struct symtab_and_line sal
;
6248 sals
= decode_line_spec (arg
, 1);
6253 sals
.sals
= (struct symtab_and_line
*)
6254 xmalloc (sizeof (struct symtab_and_line
));
6255 make_cleanup (xfree
, sals
.sals
);
6256 init_sal (&sal
); /* initialize to zeroes */
6257 sal
.line
= default_breakpoint_line
;
6258 sal
.symtab
= default_breakpoint_symtab
;
6259 sal
.pc
= default_breakpoint_address
;
6260 if (sal
.symtab
== 0)
6261 error ("No source file specified.");
6269 /* For each line spec given, delete bps which correspond
6270 to it. Do it in two passes, solely to preserve the current
6271 behavior that from_tty is forced true if we delete more than
6275 for (i
= 0; i
< sals
.nelts
; i
++)
6277 /* If exact pc given, clear bpts at that pc.
6278 If line given (pc == 0), clear all bpts on specified line.
6279 If defaulting, clear all bpts on default line
6282 defaulting sal.pc != 0 tests to do
6287 1 0 <can't happen> */
6292 /* Find all matching breakpoints, remove them from the
6293 breakpoint chain, and add them to the 'found' chain. */
6294 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6296 /* Are we going to delete b? */
6297 if (b
->type
!= bp_none
6298 && b
->type
!= bp_watchpoint
6299 && b
->type
!= bp_hardware_watchpoint
6300 && b
->type
!= bp_read_watchpoint
6301 && b
->type
!= bp_access_watchpoint
6302 /* Not if b is a watchpoint of any sort... */
6303 && (((sal
.pc
&& (b
->address
== sal
.pc
))
6304 && (!section_is_overlay (b
->section
)
6305 || b
->section
== sal
.section
))
6306 /* Yes, if sal.pc matches b (modulo overlays). */
6307 || ((default_match
|| (0 == sal
.pc
))
6308 && b
->source_file
!= NULL
6309 && sal
.symtab
!= NULL
6310 && STREQ (b
->source_file
, sal
.symtab
->filename
)
6311 && b
->line_number
== sal
.line
)))
6312 /* Yes, if sal source file and line matches b. */
6314 /* Remove it from breakpoint_chain... */
6315 if (b
== breakpoint_chain
)
6317 /* b is at the head of the list */
6318 breakpoint_chain
= b
->next
;
6322 prev
->next
= b
->next
;
6324 /* And add it to 'found' chain. */
6330 /* Keep b, and keep a pointer to it. */
6335 /* Now go thru the 'found' chain and delete them. */
6339 error ("No breakpoint at %s.", arg
);
6341 error ("No breakpoint at this line.");
6345 from_tty
= 1; /* Always report if deleted more than one */
6347 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6348 breakpoints_changed ();
6352 printf_unfiltered ("%d ", found
->number
);
6354 delete_breakpoint (found
);
6358 putchar_unfiltered ('\n');
6361 /* Delete breakpoint in BS if they are `delete' breakpoints and
6362 all breakpoints that are marked for deletion, whether hit or not.
6363 This is called after any breakpoint is hit, or after errors. */
6366 breakpoint_auto_delete (bpstat bs
)
6368 struct breakpoint
*b
, *temp
;
6370 for (; bs
; bs
= bs
->next
)
6371 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6373 delete_breakpoint (bs
->breakpoint_at
);
6375 ALL_BREAKPOINTS_SAFE (b
, temp
)
6377 if (b
->disposition
== disp_del_at_next_stop
)
6378 delete_breakpoint (b
);
6382 /* Delete a breakpoint and clean up all traces of it in the data
6386 delete_breakpoint (struct breakpoint
*bpt
)
6388 register struct breakpoint
*b
;
6392 error ("Internal error (attempted to delete a NULL breakpoint)");
6395 /* Has this bp already been deleted? This can happen because multiple
6396 lists can hold pointers to bp's. bpstat lists are especial culprits.
6398 One example of this happening is a watchpoint's scope bp. When the
6399 scope bp triggers, we notice that the watchpoint is out of scope, and
6400 delete it. We also delete its scope bp. But the scope bp is marked
6401 "auto-deleting", and is already on a bpstat. That bpstat is then
6402 checked for auto-deleting bp's, which are deleted.
6404 A real solution to this problem might involve reference counts in bp's,
6405 and/or giving them pointers back to their referencing bpstat's, and
6406 teaching delete_breakpoint to only free a bp's storage when no more
6407 references were extent. A cheaper bandaid was chosen. */
6408 if (bpt
->type
== bp_none
)
6411 if (delete_breakpoint_hook
)
6412 delete_breakpoint_hook (bpt
);
6413 breakpoint_delete_event (bpt
->number
);
6416 remove_breakpoint (bpt
, mark_inserted
);
6418 if (breakpoint_chain
== bpt
)
6419 breakpoint_chain
= bpt
->next
;
6421 /* If we have callback-style exception catchpoints, don't go through
6422 the adjustments to the C++ runtime library etc. if the inferior
6423 isn't actually running. target_enable_exception_callback for a
6424 null target ops vector gives an undesirable error message, so we
6425 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6426 exceptions are supported in this way, it's OK for now. FIXME */
6427 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6429 static char message1
[] = "Error in deleting catchpoint %d:\n";
6430 static char message
[sizeof (message1
) + 30];
6431 args_for_catchpoint_enable args
;
6433 /* Format possible error msg */
6434 sprintf (message
, message1
, bpt
->number
);
6435 args
.kind
= bpt
->type
== bp_catch_catch
?
6436 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6438 catch_errors (cover_target_enable_exception_callback
, &args
,
6439 message
, RETURN_MASK_ALL
);
6446 b
->next
= bpt
->next
;
6450 check_duplicates (bpt
);
6451 /* If this breakpoint was inserted, and there is another breakpoint
6452 at the same address, we need to insert the other breakpoint. */
6454 && bpt
->type
!= bp_hardware_watchpoint
6455 && bpt
->type
!= bp_read_watchpoint
6456 && bpt
->type
!= bp_access_watchpoint
6457 && bpt
->type
!= bp_catch_fork
6458 && bpt
->type
!= bp_catch_vfork
6459 && bpt
->type
!= bp_catch_exec
)
6462 if (b
->address
== bpt
->address
6463 && b
->section
== bpt
->section
6465 && b
->enable_state
!= bp_disabled
6466 && b
->enable_state
!= bp_shlib_disabled
6467 && b
->enable_state
!= bp_call_disabled
)
6471 /* We should never reach this point if there is a permanent
6472 breakpoint at the same address as the one being deleted.
6473 If there is a permanent breakpoint somewhere, it should
6474 always be the only one inserted. */
6475 if (b
->enable_state
== bp_permanent
)
6476 internal_error (__FILE__
, __LINE__
,
6477 "another breakpoint was inserted on top of "
6478 "a permanent breakpoint");
6480 if (b
->type
== bp_hardware_breakpoint
)
6481 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
6483 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
6485 /* If there was an error in the insert, print a message, then stop execution. */
6488 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6489 make_cleanup_ui_file_delete (tmp_error_stream
);
6492 if (b
->type
== bp_hardware_breakpoint
)
6494 fprintf_unfiltered (tmp_error_stream
,
6495 "Cannot insert hardware breakpoint %d.\n"
6496 "You may have requested too many hardware breakpoints.\n",
6501 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6502 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6503 print_address_numeric (b
->address
, 1, tmp_error_stream
);
6504 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6505 safe_strerror (val
));
6508 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6509 target_terminal_ours_for_output ();
6510 error_stream(tmp_error_stream
);
6517 free_command_lines (&bpt
->commands
);
6520 if (bpt
->cond_string
!= NULL
)
6521 xfree (bpt
->cond_string
);
6522 if (bpt
->addr_string
!= NULL
)
6523 xfree (bpt
->addr_string
);
6524 if (bpt
->exp
!= NULL
)
6526 if (bpt
->exp_string
!= NULL
)
6527 xfree (bpt
->exp_string
);
6528 if (bpt
->val
!= NULL
)
6529 value_free (bpt
->val
);
6530 if (bpt
->source_file
!= NULL
)
6531 xfree (bpt
->source_file
);
6532 if (bpt
->dll_pathname
!= NULL
)
6533 xfree (bpt
->dll_pathname
);
6534 if (bpt
->triggered_dll_pathname
!= NULL
)
6535 xfree (bpt
->triggered_dll_pathname
);
6536 if (bpt
->exec_pathname
!= NULL
)
6537 xfree (bpt
->exec_pathname
);
6539 /* Be sure no bpstat's are pointing at it after it's been freed. */
6540 /* FIXME, how can we find all bpstat's?
6541 We just check stop_bpstat for now. */
6542 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6543 if (bs
->breakpoint_at
== bpt
)
6545 bs
->breakpoint_at
= NULL
;
6547 /* bs->commands will be freed later. */
6549 /* On the chance that someone will soon try again to delete this same
6550 bp, we mark it as deleted before freeing its storage. */
6551 bpt
->type
= bp_none
;
6557 do_delete_breakpoint_cleanup (void *b
)
6559 delete_breakpoint (b
);
6563 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6565 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6569 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6571 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6575 delete_command (char *arg
, int from_tty
)
6577 struct breakpoint
*b
, *temp
;
6583 int breaks_to_delete
= 0;
6585 /* Delete all breakpoints if no argument.
6586 Do not delete internal or call-dummy breakpoints, these
6587 have to be deleted with an explicit breakpoint number argument. */
6590 if (b
->type
!= bp_call_dummy
&&
6591 b
->type
!= bp_shlib_event
&&
6592 b
->type
!= bp_thread_event
&&
6593 b
->type
!= bp_overlay_event
&&
6595 breaks_to_delete
= 1;
6598 /* Ask user only if there are some breakpoints to delete. */
6600 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
6602 ALL_BREAKPOINTS_SAFE (b
, temp
)
6604 if (b
->type
!= bp_call_dummy
&&
6605 b
->type
!= bp_shlib_event
&&
6606 b
->type
!= bp_thread_event
&&
6607 b
->type
!= bp_overlay_event
&&
6609 delete_breakpoint (b
);
6614 map_breakpoint_numbers (arg
, delete_breakpoint
);
6617 /* Reset a breakpoint given it's struct breakpoint * BINT.
6618 The value we return ends up being the return value from catch_errors.
6619 Unused in this case. */
6622 breakpoint_re_set_one (void *bint
)
6624 /* get past catch_errs */
6625 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6628 struct symtabs_and_lines sals
;
6630 enum enable_state save_enable
;
6635 warning ("attempted to reset apparently deleted breakpoint #%d?",
6639 case bp_hardware_breakpoint
:
6641 case bp_catch_unload
:
6642 if (b
->addr_string
== NULL
)
6644 /* Anything without a string can't be re-set. */
6645 delete_breakpoint (b
);
6648 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6650 ``And a hack it is, although Apple's Darwin version of GDB
6651 contains an almost identical hack to implement a "future
6652 break" command. It seems to work in many real world cases,
6653 but it is easy to come up with a test case where the patch
6654 doesn't help at all.''
6656 ``It seems that the way GDB implements breakpoints - in -
6657 shared - libraries was designed for a.out shared library
6658 systems (SunOS 4) where shared libraries were loaded at a
6659 fixed address in memory. Since ELF shared libraries can (and
6660 will) be loaded at any address in memory, things break.
6661 Fixing this is not trivial. Therefore, I'm not sure whether
6662 we should add this hack to the branch only. I cannot
6663 guarantee that things will be fixed on the trunk in the near
6666 In case we have a problem, disable this breakpoint. We'll
6667 restore its status if we succeed. Don't disable a
6668 shlib_disabled breakpoint though. There's a fair chance we
6669 can't re-set it if the shared library it's in hasn't been
6671 save_enable
= b
->enable_state
;
6672 if (b
->enable_state
!= bp_shlib_disabled
)
6673 b
->enable_state
= bp_disabled
;
6675 set_language (b
->language
);
6676 input_radix
= b
->input_radix
;
6678 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
);
6679 for (i
= 0; i
< sals
.nelts
; i
++)
6681 resolve_sal_pc (&sals
.sals
[i
]);
6683 /* Reparse conditions, they might contain references to the
6685 if (b
->cond_string
!= NULL
)
6690 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
6693 /* We need to re-set the breakpoint if the address changes... */
6694 if (b
->address
!= sals
.sals
[i
].pc
6695 /* ...or new and old breakpoints both have source files, and
6696 the source file name or the line number changes... */
6697 || (b
->source_file
!= NULL
6698 && sals
.sals
[i
].symtab
!= NULL
6699 && (!STREQ (b
->source_file
, sals
.sals
[i
].symtab
->filename
)
6700 || b
->line_number
!= sals
.sals
[i
].line
)
6702 /* ...or we switch between having a source file and not having
6704 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
6707 if (b
->source_file
!= NULL
)
6708 xfree (b
->source_file
);
6709 if (sals
.sals
[i
].symtab
== NULL
)
6710 b
->source_file
= NULL
;
6713 savestring (sals
.sals
[i
].symtab
->filename
,
6714 strlen (sals
.sals
[i
].symtab
->filename
));
6715 b
->line_number
= sals
.sals
[i
].line
;
6716 b
->address
= sals
.sals
[i
].pc
;
6718 /* Used to check for duplicates here, but that can
6719 cause trouble, as it doesn't check for disabled
6724 /* Might be better to do this just once per breakpoint_re_set,
6725 rather than once for every breakpoint. */
6726 breakpoints_changed ();
6728 b
->section
= sals
.sals
[i
].section
;
6729 b
->enable_state
= save_enable
; /* Restore it, this worked. */
6732 /* Now that this is re-enabled, check_duplicates
6734 check_duplicates (b
);
6741 case bp_hardware_watchpoint
:
6742 case bp_read_watchpoint
:
6743 case bp_access_watchpoint
:
6744 innermost_block
= NULL
;
6745 /* The issue arises of what context to evaluate this in. The
6746 same one as when it was set, but what does that mean when
6747 symbols have been re-read? We could save the filename and
6748 functionname, but if the context is more local than that, the
6749 best we could do would be something like how many levels deep
6750 and which index at that particular level, but that's going to
6751 be less stable than filenames or function names. */
6753 /* So for now, just use a global context. */
6756 b
->exp
= parse_expression (b
->exp_string
);
6757 b
->exp_valid_block
= innermost_block
;
6758 mark
= value_mark ();
6760 value_free (b
->val
);
6761 b
->val
= evaluate_expression (b
->exp
);
6762 release_value (b
->val
);
6763 if (VALUE_LAZY (b
->val
) && b
->enable_state
== bp_enabled
)
6764 value_fetch_lazy (b
->val
);
6766 if (b
->cond_string
!= NULL
)
6771 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
6773 if (b
->enable_state
== bp_enabled
)
6775 value_free_to_mark (mark
);
6777 case bp_catch_catch
:
6778 case bp_catch_throw
:
6780 /* We needn't really do anything to reset these, since the mask
6781 that requests them is unaffected by e.g., new libraries being
6784 case bp_catch_vfork
:
6789 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
6791 /* Delete longjmp and overlay event breakpoints; they will be
6792 reset later by breakpoint_re_set. */
6794 case bp_longjmp_resume
:
6795 case bp_overlay_event
:
6796 delete_breakpoint (b
);
6799 /* This breakpoint is special, it's set up when the inferior
6800 starts and we really don't want to touch it. */
6801 case bp_shlib_event
:
6803 /* Like bp_shlib_event, this breakpoint type is special.
6804 Once it is set up, we do not want to touch it. */
6805 case bp_thread_event
:
6807 /* Keep temporary breakpoints, which can be encountered when we step
6808 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
6809 Otherwise these should have been blown away via the cleanup chain
6810 or by breakpoint_init_inferior when we rerun the executable. */
6813 case bp_watchpoint_scope
:
6815 case bp_step_resume
:
6822 /* Re-set all breakpoints after symbols have been re-loaded. */
6824 breakpoint_re_set (void)
6826 struct breakpoint
*b
, *temp
;
6827 enum language save_language
;
6828 int save_input_radix
;
6829 static char message1
[] = "Error in re-setting breakpoint %d:\n";
6830 char message
[sizeof (message1
) + 30 /* slop */ ];
6832 save_language
= current_language
->la_language
;
6833 save_input_radix
= input_radix
;
6834 ALL_BREAKPOINTS_SAFE (b
, temp
)
6836 /* Format possible error msg */
6837 sprintf (message
, message1
, b
->number
);
6838 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
6840 set_language (save_language
);
6841 input_radix
= save_input_radix
;
6843 if (GET_LONGJMP_TARGET_P ())
6845 create_longjmp_breakpoint ("longjmp");
6846 create_longjmp_breakpoint ("_longjmp");
6847 create_longjmp_breakpoint ("siglongjmp");
6848 create_longjmp_breakpoint ("_siglongjmp");
6849 create_longjmp_breakpoint (NULL
);
6852 create_overlay_event_breakpoint ("_ovly_debug_event");
6855 /* Reset the thread number of this breakpoint:
6857 - If the breakpoint is for all threads, leave it as-is.
6858 - Else, reset it to the current thread for inferior_ptid. */
6860 breakpoint_re_set_thread (struct breakpoint
*b
)
6862 if (b
->thread
!= -1)
6864 if (in_thread_list (inferior_ptid
))
6865 b
->thread
= pid_to_thread_id (inferior_ptid
);
6869 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
6870 If from_tty is nonzero, it prints a message to that effect,
6871 which ends with a period (no newline). */
6874 set_ignore_count (int bptnum
, int count
, int from_tty
)
6876 register struct breakpoint
*b
;
6882 if (b
->number
== bptnum
)
6884 b
->ignore_count
= count
;
6888 printf_filtered ("Will stop next time breakpoint %d is reached.",
6890 else if (count
== 1)
6891 printf_filtered ("Will ignore next crossing of breakpoint %d.",
6894 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
6897 breakpoints_changed ();
6898 breakpoint_modify_event (b
->number
);
6902 error ("No breakpoint number %d.", bptnum
);
6905 /* Clear the ignore counts of all breakpoints. */
6907 breakpoint_clear_ignore_counts (void)
6909 struct breakpoint
*b
;
6912 b
->ignore_count
= 0;
6915 /* Command to set ignore-count of breakpoint N to COUNT. */
6918 ignore_command (char *args
, int from_tty
)
6924 error_no_arg ("a breakpoint number");
6926 num
= get_number (&p
);
6928 error ("bad breakpoint number: '%s'", args
);
6930 error ("Second argument (specified ignore-count) is missing.");
6932 set_ignore_count (num
,
6933 longest_to_int (value_as_long (parse_and_eval (p
))),
6936 printf_filtered ("\n");
6939 /* Call FUNCTION on each of the breakpoints
6940 whose numbers are given in ARGS. */
6943 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
6945 register char *p
= args
;
6948 register struct breakpoint
*b
, *tmp
;
6952 error_no_arg ("one or more breakpoint numbers");
6959 num
= get_number_or_range (&p1
);
6962 warning ("bad breakpoint number at or near '%s'", p
);
6966 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6967 if (b
->number
== num
)
6969 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
6972 if (related_breakpoint
)
6973 function (related_breakpoint
);
6977 printf_unfiltered ("No breakpoint number %d.\n", num
);
6983 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
6984 If from_tty is nonzero, it prints a message to that effect,
6985 which ends with a period (no newline). */
6988 disable_breakpoint (struct breakpoint
*bpt
)
6990 /* Never disable a watchpoint scope breakpoint; we want to
6991 hit them when we leave scope so we can delete both the
6992 watchpoint and its scope breakpoint at that time. */
6993 if (bpt
->type
== bp_watchpoint_scope
)
6996 /* You can't disable permanent breakpoints. */
6997 if (bpt
->enable_state
== bp_permanent
)
7000 bpt
->enable_state
= bp_disabled
;
7002 check_duplicates (bpt
);
7004 if (modify_breakpoint_hook
)
7005 modify_breakpoint_hook (bpt
);
7006 breakpoint_modify_event (bpt
->number
);
7011 disable_command (char *args
, int from_tty
)
7013 register struct breakpoint
*bpt
;
7015 ALL_BREAKPOINTS (bpt
)
7019 warning ("attempted to disable apparently deleted breakpoint #%d?",
7024 case bp_catch_unload
:
7026 case bp_catch_vfork
:
7028 case bp_catch_catch
:
7029 case bp_catch_throw
:
7030 case bp_hardware_breakpoint
:
7032 case bp_hardware_watchpoint
:
7033 case bp_read_watchpoint
:
7034 case bp_access_watchpoint
:
7035 disable_breakpoint (bpt
);
7040 map_breakpoint_numbers (args
, disable_breakpoint
);
7044 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7046 struct frame_info
*save_selected_frame
= NULL
;
7047 int save_selected_frame_level
= -1;
7048 int target_resources_ok
, other_type_used
;
7051 if (bpt
->type
== bp_hardware_breakpoint
)
7054 i
= hw_breakpoint_used_count ();
7055 target_resources_ok
=
7056 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7058 if (target_resources_ok
== 0)
7059 error ("No hardware breakpoint support in the target.");
7060 else if (target_resources_ok
< 0)
7061 error ("Hardware breakpoints used exceeds limit.");
7064 if (bpt
->enable_state
!= bp_permanent
)
7065 bpt
->enable_state
= bp_enabled
;
7066 bpt
->disposition
= disposition
;
7067 check_duplicates (bpt
);
7068 breakpoints_changed ();
7070 if (bpt
->type
== bp_watchpoint
||
7071 bpt
->type
== bp_hardware_watchpoint
||
7072 bpt
->type
== bp_read_watchpoint
||
7073 bpt
->type
== bp_access_watchpoint
)
7075 if (bpt
->exp_valid_block
!= NULL
)
7077 struct frame_info
*fr
=
7078 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7082 Cannot enable watchpoint %d because the block in which its expression\n\
7083 is valid is not currently in scope.\n", bpt
->number
);
7084 bpt
->enable_state
= bp_disabled
;
7088 save_selected_frame
= deprecated_selected_frame
;
7089 save_selected_frame_level
= frame_relative_level (deprecated_selected_frame
);
7093 value_free (bpt
->val
);
7094 mark
= value_mark ();
7095 bpt
->val
= evaluate_expression (bpt
->exp
);
7096 release_value (bpt
->val
);
7097 if (VALUE_LAZY (bpt
->val
))
7098 value_fetch_lazy (bpt
->val
);
7100 if (bpt
->type
== bp_hardware_watchpoint
||
7101 bpt
->type
== bp_read_watchpoint
||
7102 bpt
->type
== bp_access_watchpoint
)
7104 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7105 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7107 /* Hack around 'unused var' error for some targets here */
7109 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7110 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7111 /* we can consider of type is bp_hardware_watchpoint, convert to
7112 bp_watchpoint in the following condition */
7113 if (target_resources_ok
< 0)
7116 Cannot enable watchpoint %d because target watch resources\n\
7117 have been allocated for other watchpoints.\n", bpt
->number
);
7118 bpt
->enable_state
= bp_disabled
;
7119 value_free_to_mark (mark
);
7124 if (save_selected_frame_level
>= 0)
7125 select_frame (save_selected_frame
);
7126 value_free_to_mark (mark
);
7128 if (modify_breakpoint_hook
)
7129 modify_breakpoint_hook (bpt
);
7130 breakpoint_modify_event (bpt
->number
);
7134 enable_breakpoint (struct breakpoint
*bpt
)
7136 do_enable_breakpoint (bpt
, bpt
->disposition
);
7139 /* The enable command enables the specified breakpoints (or all defined
7140 breakpoints) so they once again become (or continue to be) effective
7141 in stopping the inferior. */
7145 enable_command (char *args
, int from_tty
)
7147 register struct breakpoint
*bpt
;
7149 ALL_BREAKPOINTS (bpt
)
7153 warning ("attempted to enable apparently deleted breakpoint #%d?",
7158 case bp_catch_unload
:
7160 case bp_catch_vfork
:
7162 case bp_catch_catch
:
7163 case bp_catch_throw
:
7164 case bp_hardware_breakpoint
:
7166 case bp_hardware_watchpoint
:
7167 case bp_read_watchpoint
:
7168 case bp_access_watchpoint
:
7169 enable_breakpoint (bpt
);
7174 map_breakpoint_numbers (args
, enable_breakpoint
);
7178 enable_once_breakpoint (struct breakpoint
*bpt
)
7180 do_enable_breakpoint (bpt
, disp_disable
);
7185 enable_once_command (char *args
, int from_tty
)
7187 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7191 enable_delete_breakpoint (struct breakpoint
*bpt
)
7193 do_enable_breakpoint (bpt
, disp_del
);
7198 enable_delete_command (char *args
, int from_tty
)
7200 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7203 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7205 struct symtabs_and_lines
7206 decode_line_spec_1 (char *string
, int funfirstline
)
7208 struct symtabs_and_lines sals
;
7210 error ("Empty line specification.");
7211 if (default_breakpoint_valid
)
7212 sals
= decode_line_1 (&string
, funfirstline
,
7213 default_breakpoint_symtab
,
7214 default_breakpoint_line
,
7217 sals
= decode_line_1 (&string
, funfirstline
,
7218 (struct symtab
*) NULL
, 0, (char ***) NULL
);
7220 error ("Junk at end of line specification: %s", string
);
7225 _initialize_breakpoint (void)
7227 struct cmd_list_element
*c
;
7229 breakpoint_chain
= 0;
7230 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7231 before a breakpoint is set. */
7232 breakpoint_count
= 0;
7234 add_com ("ignore", class_breakpoint
, ignore_command
,
7235 "Set ignore-count of breakpoint number N to COUNT.\n\
7236 Usage is `ignore N COUNT'.");
7238 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7240 add_com ("commands", class_breakpoint
, commands_command
,
7241 "Set commands to be executed when a breakpoint is hit.\n\
7242 Give breakpoint number as argument after \"commands\".\n\
7243 With no argument, the targeted breakpoint is the last one set.\n\
7244 The commands themselves follow starting on the next line.\n\
7245 Type a line containing \"end\" to indicate the end of them.\n\
7246 Give \"silent\" as the first line to make the breakpoint silent;\n\
7247 then no output is printed when it is hit, except what the commands print.");
7249 add_com ("condition", class_breakpoint
, condition_command
,
7250 "Specify breakpoint number N to break only if COND is true.\n\
7251 Usage is `condition N COND', where N is an integer and COND is an\n\
7252 expression to be evaluated whenever breakpoint N is reached.");
7254 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7255 "Set a temporary breakpoint. Args like \"break\" command.\n\
7256 Like \"break\" except the breakpoint is only temporary,\n\
7257 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7258 by using \"enable delete\" on the breakpoint number.");
7259 set_cmd_completer (c
, location_completer
);
7261 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7262 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7263 Like \"break\" except the breakpoint requires hardware support,\n\
7264 some target hardware may not have this support.");
7265 set_cmd_completer (c
, location_completer
);
7267 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7268 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7269 Like \"hbreak\" except the breakpoint is only temporary,\n\
7270 so it will be deleted when hit.");
7271 set_cmd_completer (c
, location_completer
);
7273 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7274 "Enable some breakpoints.\n\
7275 Give breakpoint numbers (separated by spaces) as arguments.\n\
7276 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7277 This is used to cancel the effect of the \"disable\" command.\n\
7278 With a subcommand you can enable temporarily.",
7279 &enablelist
, "enable ", 1, &cmdlist
);
7281 add_com ("ab", class_breakpoint
, enable_command
,
7282 "Enable some breakpoints.\n\
7283 Give breakpoint numbers (separated by spaces) as arguments.\n\
7284 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7285 This is used to cancel the effect of the \"disable\" command.\n\
7286 With a subcommand you can enable temporarily.");
7288 add_com_alias ("en", "enable", class_breakpoint
, 1);
7290 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7291 "Enable some breakpoints.\n\
7292 Give breakpoint numbers (separated by spaces) as arguments.\n\
7293 This is used to cancel the effect of the \"disable\" command.\n\
7294 May be abbreviated to simply \"enable\".\n",
7295 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7297 add_cmd ("once", no_class
, enable_once_command
,
7298 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7299 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7302 add_cmd ("delete", no_class
, enable_delete_command
,
7303 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7304 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7307 add_cmd ("delete", no_class
, enable_delete_command
,
7308 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7309 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7312 add_cmd ("once", no_class
, enable_once_command
,
7313 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7314 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7317 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7318 "Disable some breakpoints.\n\
7319 Arguments are breakpoint numbers with spaces in between.\n\
7320 To disable all breakpoints, give no argument.\n\
7321 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7322 &disablelist
, "disable ", 1, &cmdlist
);
7323 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7324 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7326 add_com ("sb", class_breakpoint
, disable_command
,
7327 "Disable some breakpoints.\n\
7328 Arguments are breakpoint numbers with spaces in between.\n\
7329 To disable all breakpoints, give no argument.\n\
7330 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7332 add_cmd ("breakpoints", class_alias
, disable_command
,
7333 "Disable some breakpoints.\n\
7334 Arguments are breakpoint numbers with spaces in between.\n\
7335 To disable all breakpoints, give no argument.\n\
7336 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7337 This command may be abbreviated \"disable\".",
7340 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7341 "Delete some breakpoints or auto-display expressions.\n\
7342 Arguments are breakpoint numbers with spaces in between.\n\
7343 To delete all breakpoints, give no argument.\n\
7345 Also a prefix command for deletion of other GDB objects.\n\
7346 The \"unset\" command is also an alias for \"delete\".",
7347 &deletelist
, "delete ", 1, &cmdlist
);
7348 add_com_alias ("d", "delete", class_breakpoint
, 1);
7350 add_com ("db", class_breakpoint
, delete_command
,
7351 "Delete some breakpoints.\n\
7352 Arguments are breakpoint numbers with spaces in between.\n\
7353 To delete all breakpoints, give no argument.\n");
7355 add_cmd ("breakpoints", class_alias
, delete_command
,
7356 "Delete some breakpoints or auto-display expressions.\n\
7357 Arguments are breakpoint numbers with spaces in between.\n\
7358 To delete all breakpoints, give no argument.\n\
7359 This command may be abbreviated \"delete\".",
7362 add_com ("clear", class_breakpoint
, clear_command
,
7363 concat ("Clear breakpoint at specified line or function.\n\
7364 Argument may be line number, function name, or \"*\" and an address.\n\
7365 If line number is specified, all breakpoints in that line are cleared.\n\
7366 If function is specified, breakpoints at beginning of function are cleared.\n\
7367 If an address is specified, breakpoints at that address are cleared.\n\n",
7368 "With no argument, clears all breakpoints in the line that the selected frame\n\
7371 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7373 c
= add_com ("break", class_breakpoint
, break_command
,
7374 concat ("Set breakpoint at specified line or function.\n\
7375 Argument may be line number, function name, or \"*\" and an address.\n\
7376 If line number is specified, break at start of code for that line.\n\
7377 If function is specified, break at start of code for that function.\n\
7378 If an address is specified, break at that exact address.\n",
7379 "With no arg, uses current execution address of selected stack frame.\n\
7380 This is useful for breaking on return to a stack frame.\n\
7382 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7384 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7385 set_cmd_completer (c
, location_completer
);
7387 add_com_alias ("b", "break", class_run
, 1);
7388 add_com_alias ("br", "break", class_run
, 1);
7389 add_com_alias ("bre", "break", class_run
, 1);
7390 add_com_alias ("brea", "break", class_run
, 1);
7394 add_com_alias ("ba", "break", class_breakpoint
, 1);
7395 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7400 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7401 "Break in function/address or break at a line in the current file.",
7402 &stoplist
, "stop ", 1, &cmdlist
);
7403 add_cmd ("in", class_breakpoint
, stopin_command
,
7404 "Break in function or address.\n", &stoplist
);
7405 add_cmd ("at", class_breakpoint
, stopat_command
,
7406 "Break at a line in the current file.\n", &stoplist
);
7407 add_com ("status", class_info
, breakpoints_info
,
7408 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7409 The \"Type\" column indicates one of:\n\
7410 \tbreakpoint - normal breakpoint\n\
7411 \twatchpoint - watchpoint\n\
7412 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7413 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7414 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7415 address and file/line number respectively.\n\n",
7416 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7417 are set to the address of the last breakpoint listed.\n\n\
7418 Convenience variable \"$bpnum\" contains the number of the last\n\
7419 breakpoint set.", NULL
));
7422 add_info ("breakpoints", breakpoints_info
,
7423 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7424 The \"Type\" column indicates one of:\n\
7425 \tbreakpoint - normal breakpoint\n\
7426 \twatchpoint - watchpoint\n\
7427 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7428 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7429 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7430 address and file/line number respectively.\n\n",
7431 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7432 are set to the address of the last breakpoint listed.\n\n\
7433 Convenience variable \"$bpnum\" contains the number of the last\n\
7434 breakpoint set.", NULL
));
7437 add_com ("lb", class_breakpoint
, breakpoints_info
,
7438 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7439 The \"Type\" column indicates one of:\n\
7440 \tbreakpoint - normal breakpoint\n\
7441 \twatchpoint - watchpoint\n\
7442 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7443 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7444 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7445 address and file/line number respectively.\n\n",
7446 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7447 are set to the address of the last breakpoint listed.\n\n\
7448 Convenience variable \"$bpnum\" contains the number of the last\n\
7449 breakpoint set.", NULL
));
7451 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7452 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7453 The \"Type\" column indicates one of:\n\
7454 \tbreakpoint - normal breakpoint\n\
7455 \twatchpoint - watchpoint\n\
7456 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7457 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7458 \tuntil - internal breakpoint used by the \"until\" command\n\
7459 \tfinish - internal breakpoint used by the \"finish\" command\n",
7460 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7461 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7462 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7463 address and file/line number respectively.\n\n",
7464 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7465 are set to the address of the last breakpoint listed.\n\n\
7466 Convenience variable \"$bpnum\" contains the number of the last\n\
7467 breakpoint set.", NULL
),
7468 &maintenanceinfolist
);
7470 add_com ("catch", class_breakpoint
, catch_command
,
7471 "Set catchpoints to catch events.\n\
7472 Raised signals may be caught:\n\
7473 \tcatch signal - all signals\n\
7474 \tcatch signal <signame> - a particular signal\n\
7475 Raised exceptions may be caught:\n\
7476 \tcatch throw - all exceptions, when thrown\n\
7477 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7478 \tcatch catch - all exceptions, when caught\n\
7479 \tcatch catch <exceptname> - a particular exception, when caught\n\
7480 Thread or process events may be caught:\n\
7481 \tcatch thread_start - any threads, just after creation\n\
7482 \tcatch thread_exit - any threads, just before expiration\n\
7483 \tcatch thread_join - any threads, just after joins\n\
7484 Process events may be caught:\n\
7485 \tcatch start - any processes, just after creation\n\
7486 \tcatch exit - any processes, just before expiration\n\
7487 \tcatch fork - calls to fork()\n\
7488 \tcatch vfork - calls to vfork()\n\
7489 \tcatch exec - calls to exec()\n\
7490 Dynamically-linked library events may be caught:\n\
7491 \tcatch load - loads of any library\n\
7492 \tcatch load <libname> - loads of a particular library\n\
7493 \tcatch unload - unloads of any library\n\
7494 \tcatch unload <libname> - unloads of a particular library\n\
7495 The act of your program's execution stopping may also be caught:\n\
7497 C++ exceptions may be caught:\n\
7498 \tcatch throw - all exceptions, when thrown\n\
7499 \tcatch catch - all exceptions, when caught\n\
7501 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7502 after a fork or vfork is caught.\n\n\
7503 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7505 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7506 "Set temporary catchpoints to catch events.\n\
7507 Args like \"catch\" command.\n\
7508 Like \"catch\" except the catchpoint is only temporary,\n\
7509 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7510 by using \"enable delete\" on the catchpoint number.");
7512 c
= add_com ("watch", class_breakpoint
, watch_command
,
7513 "Set a watchpoint for an expression.\n\
7514 A watchpoint stops execution of your program whenever the value of\n\
7515 an expression changes.");
7516 set_cmd_completer (c
, location_completer
);
7518 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
7519 "Set a read watchpoint for an expression.\n\
7520 A watchpoint stops execution of your program whenever the value of\n\
7521 an expression is read.");
7522 set_cmd_completer (c
, location_completer
);
7524 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
7525 "Set a watchpoint for an expression.\n\
7526 A watchpoint stops execution of your program whenever the value of\n\
7527 an expression is either read or written.");
7528 set_cmd_completer (c
, location_completer
);
7530 add_info ("watchpoints", breakpoints_info
,
7531 "Synonym for ``info breakpoints''.");
7534 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
7535 (char *) &can_use_hw_watchpoints
,
7536 "Set debugger's willingness to use watchpoint hardware.\n\
7537 If zero, gdb will not use hardware for new watchpoints, even if\n\
7538 such is available. (However, any hardware watchpoints that were\n\
7539 created before setting this to nonzero, will continue to use watchpoint\n\
7542 add_show_from_set (c
, &showlist
);
7544 can_use_hw_watchpoints
= 1;