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, 2004
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 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 int break_command_1 (char *, int, int, struct breakpoint
*);
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 breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
102 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
);
104 static void describe_other_breakpoints (CORE_ADDR
, asection
*);
106 static void breakpoints_info (char *, int);
108 static void breakpoint_1 (int, int);
110 static bpstat
bpstat_alloc (struct breakpoint
*, bpstat
);
112 static int breakpoint_cond_eval (void *);
114 static void cleanup_executing_breakpoints (void *);
116 static void commands_command (char *, int);
118 static void condition_command (char *, int);
120 static int get_number_trailer (char **, int);
122 static int do_captured_parse_breakpoint (struct ui_out
*, void *);
124 void set_breakpoint_count (int);
133 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
135 static enum print_stop_action
print_it_typical (bpstat
);
137 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
141 enum exception_event_kind kind
;
144 args_for_catchpoint_enable
;
146 static int watchpoint_check (void *);
148 static int cover_target_enable_exception_callback (void *);
150 static void maintenance_info_breakpoints (char *, int);
152 static void create_longjmp_breakpoint (char *);
154 static void create_overlay_event_breakpoint (char *);
156 static int hw_breakpoint_used_count (void);
158 static int hw_watchpoint_used_count (enum bptype
, int *);
160 static void hbreak_command (char *, int);
162 static void thbreak_command (char *, int);
164 static void watch_command_1 (char *, int, int);
166 static void rwatch_command (char *, int);
168 static void awatch_command (char *, int);
170 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
172 static void solib_load_unload_1 (char *hookname
,
175 char *cond_string
, enum bptype bp_kind
);
177 static void create_fork_vfork_event_catchpoint (int tempflag
,
179 enum bptype bp_kind
);
181 static void break_at_finish_at_depth_command_1 (char *arg
,
182 int flag
, int from_tty
);
184 static void break_at_finish_command_1 (char *arg
, int flag
, int from_tty
);
186 static void stop_command (char *arg
, int from_tty
);
188 static void stopin_command (char *arg
, int from_tty
);
190 static void stopat_command (char *arg
, int from_tty
);
192 static char *ep_find_event_name_end (char *arg
);
194 static char *ep_parse_optional_if_clause (char **arg
);
196 static char *ep_parse_optional_filename (char **arg
);
198 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
199 enum exception_event_kind ex_event
,
200 struct symtab_and_line
*sal
);
202 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
203 char *arg
, int tempflag
, int from_tty
);
205 static void tcatch_command (char *arg
, int from_tty
);
207 static void ep_skip_leading_whitespace (char **s
);
209 /* Prototypes for exported functions. */
211 /* If FALSE, gdb will not use hardware support for watchpoints, even
212 if such is available. */
213 static int can_use_hw_watchpoints
;
215 void _initialize_breakpoint (void);
217 extern int addressprint
; /* Print machine addresses? */
219 /* Are we executing breakpoint commands? */
220 static int executing_breakpoint_commands
;
222 /* Are overlay event breakpoints enabled? */
223 static int overlay_events_enabled
;
225 /* Walk the following statement or block through all breakpoints.
226 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
229 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
231 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
232 for (B = breakpoint_chain; \
233 B ? (TMP=B->next, 1): 0; \
236 /* Similar iterators for the low-level breakpoints. */
238 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->next)
240 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
241 for (B = bp_location_chain; \
242 B ? (TMP=B->next, 1): 0; \
245 /* True if breakpoint hit counts should be displayed in breakpoint info. */
247 int show_breakpoint_hit_counts
= 1;
249 /* Chains of all breakpoints defined. */
251 struct breakpoint
*breakpoint_chain
;
253 struct bp_location
*bp_location_chain
;
255 /* Number of last breakpoint made. */
257 int breakpoint_count
;
259 /* Pointer to current exception event record */
260 static struct exception_event_record
*current_exception_event
;
262 /* Indicator of whether exception catchpoints should be nuked
263 between runs of a program */
264 int exception_catchpoints_are_fragile
= 0;
266 /* Indicator of when exception catchpoints set-up should be
267 reinitialized -- e.g. when program is re-run */
268 int exception_support_initialized
= 0;
270 /* This function returns a pointer to the string representation of the
271 pathname of the dynamically-linked library that has just been
274 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
275 or undefined results are guaranteed.
277 This string's contents are only valid immediately after the
278 inferior has stopped in the dynamic linker hook, and becomes
279 invalid as soon as the inferior is continued. Clients should make
280 a copy of this string if they wish to continue the inferior and
281 then access the string. */
283 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
284 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
287 /* This function returns a pointer to the string representation of the
288 pathname of the dynamically-linked library that has just been
291 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
292 TRUE, or undefined results are guaranteed.
294 This string's contents are only valid immediately after the
295 inferior has stopped in the dynamic linker hook, and becomes
296 invalid as soon as the inferior is continued. Clients should make
297 a copy of this string if they wish to continue the inferior and
298 then access the string. */
300 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
301 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
304 /* This function is called by the "catch load" command. It allows the
305 debugger to be notified by the dynamic linker when a specified
306 library file (or any library file, if filename is NULL) is loaded. */
308 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
309 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
310 error ("catch of library loads not yet implemented on this platform")
313 /* This function is called by the "catch unload" command. It allows
314 the debugger to be notified by the dynamic linker when a specified
315 library file (or any library file, if filename is NULL) is
318 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
319 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
320 error ("catch of library unloads not yet implemented on this platform")
323 /* Return whether a breakpoint is an active enabled breakpoint. */
325 breakpoint_enabled (struct breakpoint
*b
)
327 return (b
->enable_state
== bp_enabled
&& !b
->pending
);
330 /* Set breakpoint count to NUM. */
333 set_breakpoint_count (int num
)
335 breakpoint_count
= num
;
336 set_internalvar (lookup_internalvar ("bpnum"),
337 value_from_longest (builtin_type_int
, (LONGEST
) num
));
340 /* Used in run_command to zero the hit count when a new run starts. */
343 clear_breakpoint_hit_counts (void)
345 struct breakpoint
*b
;
351 /* Default address, symtab and line to put a breakpoint at
352 for "break" command with no arg.
353 if default_breakpoint_valid is zero, the other three are
354 not valid, and "break" with no arg is an error.
356 This set by print_stack_frame, which calls set_default_breakpoint. */
358 int default_breakpoint_valid
;
359 CORE_ADDR default_breakpoint_address
;
360 struct symtab
*default_breakpoint_symtab
;
361 int default_breakpoint_line
;
363 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
364 Advance *PP after the string and any trailing whitespace.
366 Currently the string can either be a number or "$" followed by the name
367 of a convenience variable. Making it an expression wouldn't work well
368 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
370 TRAILER is a character which can be found after the number; most
371 commonly this is `-'. If you don't want a trailer, use \0. */
373 get_number_trailer (char **pp
, int trailer
)
375 int retval
= 0; /* default */
379 /* Empty line means refer to the last breakpoint. */
380 return breakpoint_count
;
383 /* Make a copy of the name, so we can null-terminate it
384 to pass to lookup_internalvar(). */
389 while (isalnum (*p
) || *p
== '_')
391 varname
= (char *) alloca (p
- start
+ 1);
392 strncpy (varname
, start
, p
- start
);
393 varname
[p
- start
] = '\0';
394 val
= value_of_internalvar (lookup_internalvar (varname
));
395 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_INT
)
396 retval
= (int) value_as_long (val
);
399 printf_filtered ("Convenience variable must have integer value.\n");
407 while (*p
>= '0' && *p
<= '9')
410 /* There is no number here. (e.g. "cond a == b"). */
412 /* Skip non-numeric token */
413 while (*p
&& !isspace((int) *p
))
415 /* Return zero, which caller must interpret as error. */
421 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
423 /* Trailing junk: return 0 and let caller print error msg. */
424 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
435 /* Like get_number_trailer, but don't allow a trailer. */
437 get_number (char **pp
)
439 return get_number_trailer (pp
, '\0');
442 /* Parse a number or a range.
443 * A number will be of the form handled by get_number.
444 * A range will be of the form <number1> - <number2>, and
445 * will represent all the integers between number1 and number2,
448 * While processing a range, this fuction is called iteratively;
449 * At each call it will return the next value in the range.
451 * At the beginning of parsing a range, the char pointer PP will
452 * be advanced past <number1> and left pointing at the '-' token.
453 * Subsequent calls will not advance the pointer until the range
454 * is completed. The call that completes the range will advance
455 * pointer PP past <number2>.
459 get_number_or_range (char **pp
)
461 static int last_retval
, end_value
;
462 static char *end_ptr
;
463 static int in_range
= 0;
467 /* Default case: pp is pointing either to a solo number,
468 or to the first number of a range. */
469 last_retval
= get_number_trailer (pp
, '-');
474 /* This is the start of a range (<number1> - <number2>).
475 Skip the '-', parse and remember the second number,
476 and also remember the end of the final token. */
480 while (isspace ((int) *end_ptr
))
481 end_ptr
++; /* skip white space */
482 end_value
= get_number (temp
);
483 if (end_value
< last_retval
)
485 error ("inverted range");
487 else if (end_value
== last_retval
)
489 /* degenerate range (number1 == number2). Advance the
490 token pointer so that the range will be treated as a
499 error ("negative value");
502 /* pp points to the '-' that betokens a range. All
503 number-parsing has already been done. Return the next
504 integer value (one greater than the saved previous value).
505 Do not advance the token pointer 'pp' until the end of range
508 if (++last_retval
== end_value
)
510 /* End of range reached; advance token pointer. */
520 /* condition N EXP -- set break condition of breakpoint N to EXP. */
523 condition_command (char *arg
, int from_tty
)
525 struct breakpoint
*b
;
530 error_no_arg ("breakpoint number");
533 bnum
= get_number (&p
);
535 error ("Bad breakpoint argument: '%s'", arg
);
538 if (b
->number
== bnum
)
545 if (b
->cond_string
!= NULL
)
546 xfree (b
->cond_string
);
551 b
->cond_string
= NULL
;
553 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
558 /* I don't know if it matters whether this is the string the user
559 typed in or the decompiled expression. */
560 b
->cond_string
= savestring (arg
, strlen (arg
));
563 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
565 error ("Junk at end of expression");
568 breakpoints_changed ();
569 breakpoint_modify_event (b
->number
);
573 error ("No breakpoint number %d.", bnum
);
577 commands_command (char *arg
, int from_tty
)
579 struct breakpoint
*b
;
582 struct command_line
*l
;
584 /* If we allowed this, we would have problems with when to
585 free the storage, if we change the commands currently
588 if (executing_breakpoint_commands
)
589 error ("Can't use the \"commands\" command among a breakpoint's commands.");
592 bnum
= get_number (&p
);
595 error ("Unexpected extra arguments following breakpoint number.");
598 if (b
->number
== bnum
)
600 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
602 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
603 l
= read_command_lines (tmpbuf
, from_tty
);
604 do_cleanups (cleanups
);
605 free_command_lines (&b
->commands
);
607 breakpoints_changed ();
608 breakpoint_modify_event (b
->number
);
611 error ("No breakpoint number %d.", bnum
);
614 /* Like target_read_memory() but if breakpoints are inserted, return
615 the shadow contents instead of the breakpoints themselves.
617 Read "memory data" from whatever target or inferior we have.
618 Returns zero if successful, errno value if not. EIO is used
619 for address out of bounds. If breakpoints are inserted, returns
620 shadow contents, not the breakpoints themselves. From breakpoint.c. */
623 read_memory_nobpt (CORE_ADDR memaddr
, char *myaddr
, unsigned len
)
626 struct bp_location
*b
;
627 CORE_ADDR bp_addr
= 0;
630 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
631 /* No breakpoints on this machine. */
632 return target_read_memory (memaddr
, myaddr
, len
);
636 if (b
->owner
->type
== bp_none
)
637 warning ("reading through apparently deleted breakpoint #%d?",
640 if (b
->loc_type
!= bp_loc_software_breakpoint
)
644 /* Addresses and length of the part of the breakpoint that
646 /* XXXX The m68k, sh and h8300 have different local and remote
647 breakpoint values. BREAKPOINT_FROM_PC still manages to
648 correctly determine the breakpoints memory address and size
649 for these targets. */
650 bp_addr
= b
->address
;
652 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
657 if (bp_addr
+ bp_size
<= memaddr
)
658 /* The breakpoint is entirely before the chunk of memory we
661 if (bp_addr
>= memaddr
+ len
)
662 /* The breakpoint is entirely after the chunk of memory we are
665 /* Copy the breakpoint from the shadow contents, and recurse for
666 the things before and after. */
668 /* Offset within shadow_contents. */
671 if (bp_addr
< memaddr
)
673 /* Only copy the second part of the breakpoint. */
674 bp_size
-= memaddr
- bp_addr
;
675 bptoffset
= memaddr
- bp_addr
;
679 if (bp_addr
+ bp_size
> memaddr
+ len
)
681 /* Only copy the first part of the breakpoint. */
682 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
685 memcpy (myaddr
+ bp_addr
- memaddr
,
686 b
->shadow_contents
+ bptoffset
, bp_size
);
688 if (bp_addr
> memaddr
)
690 /* Copy the section of memory before the breakpoint. */
691 status
= read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
696 if (bp_addr
+ bp_size
< memaddr
+ len
)
698 /* Copy the section of memory after the breakpoint. */
699 status
= read_memory_nobpt (bp_addr
+ bp_size
,
700 myaddr
+ bp_addr
+ bp_size
- memaddr
,
701 memaddr
+ len
- (bp_addr
+ bp_size
));
708 /* Nothing overlaps. Just call read_memory_noerr. */
709 return target_read_memory (memaddr
, myaddr
, len
);
713 /* A wrapper function for inserting catchpoints. */
715 insert_catchpoint (struct ui_out
*uo
, void *args
)
717 struct breakpoint
*b
= (struct breakpoint
*) args
;
723 val
= target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
726 val
= target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
729 val
= target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
732 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
737 throw_exception (RETURN_ERROR
);
742 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
743 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
744 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
746 NOTE drow/2003-09-09: This routine could be broken down to an object-style
747 method for each breakpoint or catchpoint type. */
749 insert_bp_location (struct bp_location
*bpt
,
750 struct ui_file
*tmp_error_stream
,
751 int *disabled_breaks
, int *process_warning
,
752 int *hw_breakpoint_error
)
756 /* Permanent breakpoints cannot be inserted or removed. Disabled
757 breakpoints should not be inserted. */
758 if (!breakpoint_enabled (bpt
->owner
))
761 if (bpt
->inserted
|| bpt
->duplicate
)
764 if (bpt
->loc_type
== bp_loc_software_breakpoint
765 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
767 /* First check to see if we have to handle an overlay. */
768 if (overlay_debugging
== ovly_off
769 || bpt
->section
== NULL
770 || !(section_is_overlay (bpt
->section
)))
772 /* No overlay handling: just set the breakpoint. */
774 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
775 val
= target_insert_hw_breakpoint (bpt
->address
,
776 bpt
->shadow_contents
);
778 val
= target_insert_breakpoint (bpt
->address
,
779 bpt
->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 (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
791 warning ("hardware breakpoint %d not supported in overlay!\n",
795 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
797 /* Set a software (trap) breakpoint at the LMA. */
798 val
= target_insert_breakpoint (addr
, bpt
->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 (bpt
->section
))
808 /* Yes. This overlay section is mapped into memory. */
809 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
810 val
= target_insert_hw_breakpoint (bpt
->address
,
811 bpt
->shadow_contents
);
813 val
= target_insert_breakpoint (bpt
->address
,
814 bpt
->shadow_contents
);
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 (bpt
->address
))
830 /* See also: disable_breakpoints_in_shlibs. */
832 bpt
->owner
->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");
841 *disabled_breaks
= 1;
842 fprintf_unfiltered (tmp_error_stream
,
843 "breakpoint #%d\n", bpt
->owner
->number
);
848 #ifdef ONE_PROCESS_WRITETEXT
849 *process_warning
= 1;
851 if (bpt
->loc_type
== bp_loc_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 (bpt
->address
, 1, tmp_error_stream
);
866 fprintf_filtered (tmp_error_stream
, ": %s.\n",
867 safe_strerror (val
));
878 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
879 /* NOTE drow/2003-09-08: This state only exists for removing
880 watchpoints. It's not clear that it's necessary... */
881 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
883 /* FIXME drow/2003-09-08: This code sets multiple hardware watchpoints
884 based on the expression. Ideally this should happen at a higher level,
885 and there should be one bp_location for each computed address we
886 must watch. As soon as a many-to-one mapping is available I'll
889 struct frame_info
*saved_frame
;
890 int saved_level
, within_current_scope
;
891 struct value
*mark
= value_mark ();
894 /* Save the current frame and level so we can restore it after
895 evaluating the watchpoint expression on its own frame. */
896 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
897 took a frame parameter, so that we didn't have to change the
899 saved_frame
= deprecated_selected_frame
;
900 saved_level
= frame_relative_level (deprecated_selected_frame
);
902 /* Determine if the watchpoint is within scope. */
903 if (bpt
->owner
->exp_valid_block
== NULL
)
904 within_current_scope
= 1;
907 struct frame_info
*fi
;
908 fi
= frame_find_by_id (bpt
->owner
->watchpoint_frame
);
909 within_current_scope
= (fi
!= NULL
);
910 if (within_current_scope
)
914 if (within_current_scope
)
916 /* Evaluate the expression and cut the chain of values
917 produced off from the value chain.
919 Make sure the value returned isn't lazy; we use
920 laziness to determine what memory GDB actually needed
921 in order to compute the value of the expression. */
922 v
= evaluate_expression (bpt
->owner
->exp
);
924 value_release_to_mark (mark
);
926 bpt
->owner
->val_chain
= v
;
929 /* Look at each value on the value chain. */
930 for (; v
; v
= v
->next
)
932 /* If it's a memory location, and GDB actually needed
933 its contents to evaluate the expression, then we
935 if (VALUE_LVAL (v
) == lval_memory
938 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
940 /* We only watch structs and arrays if user asked
941 for it explicitly, never if they just happen to
942 appear in the middle of some value chain. */
943 if (v
== bpt
->owner
->val_chain
944 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
945 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
950 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
951 len
= TYPE_LENGTH (VALUE_TYPE (v
));
953 if (bpt
->owner
->type
== bp_read_watchpoint
)
955 else if (bpt
->owner
->type
== bp_access_watchpoint
)
958 val
= target_insert_watchpoint (addr
, len
, type
);
961 /* Don't exit the loop, try to insert
962 every value on the value chain. That's
963 because we will be removing all the
964 watches below, and removing a
965 watchpoint we didn't insert could have
973 /* Failure to insert a watchpoint on any memory value in the
974 value chain brings us here. */
977 remove_breakpoint (bpt
, mark_uninserted
);
978 *hw_breakpoint_error
= 1;
979 fprintf_unfiltered (tmp_error_stream
,
980 "Could not insert hardware watchpoint %d.\n",
987 printf_filtered ("Hardware watchpoint %d deleted ", bpt
->owner
->number
);
988 printf_filtered ("because the program has left the block \n");
989 printf_filtered ("in which its expression is valid.\n");
990 if (bpt
->owner
->related_breakpoint
)
991 bpt
->owner
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
992 bpt
->owner
->disposition
= disp_del_at_next_stop
;
995 /* Restore the frame and level. */
996 if (saved_frame
!= deprecated_selected_frame
997 || saved_level
!= frame_relative_level (deprecated_selected_frame
))
998 select_frame (saved_frame
);
1003 else if (ep_is_exception_catchpoint (bpt
->owner
))
1005 /* FIXME drow/2003-09-09: This code sets both a catchpoint and a
1006 breakpoint. Once again, it would be better if this was represented
1007 as two bp_locations. */
1009 /* If we get here, we must have a callback mechanism for exception
1010 events -- with g++ style embedded label support, we insert
1011 ordinary breakpoints and not catchpoints. */
1012 val
= target_insert_breakpoint (bpt
->address
, bpt
->shadow_contents
);
1015 /* Couldn't set breakpoint for some reason */
1016 fprintf_unfiltered (tmp_error_stream
,
1017 "Cannot insert catchpoint %d; disabling it.\n",
1018 bpt
->owner
->number
);
1019 fprintf_filtered (tmp_error_stream
,
1020 "Error accessing memory address ");
1021 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
1022 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1023 safe_strerror (val
));
1024 bpt
->owner
->enable_state
= bp_disabled
;
1028 /* Bp set, now make sure callbacks are enabled */
1029 /* Format possible error msg */
1030 char *message
= xstrprintf ("Error inserting catchpoint %d:\n",
1031 bpt
->owner
->number
);
1032 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
1034 args_for_catchpoint_enable args
;
1035 args
.kind
= bpt
->owner
->type
== bp_catch_catch
?
1036 EX_EVENT_CATCH
: EX_EVENT_THROW
;
1038 val
= catch_errors (cover_target_enable_exception_callback
,
1039 &args
, message
, RETURN_MASK_ALL
);
1040 do_cleanups (cleanups
);
1041 if (val
!= 0 && val
!= -1)
1044 /* Check if something went wrong; val == 0 can be ignored */
1047 /* something went wrong */
1048 fprintf_unfiltered (tmp_error_stream
,
1049 "Cannot insert catchpoint %d; disabling it.\n",
1050 bpt
->owner
->number
);
1051 bpt
->owner
->enable_state
= bp_disabled
;
1058 else if (bpt
->owner
->type
== bp_catch_fork
1059 || bpt
->owner
->type
== bp_catch_vfork
1060 || bpt
->owner
->type
== bp_catch_exec
)
1062 char *prefix
= xstrprintf ("warning: inserting catchpoint %d: ",
1063 bpt
->owner
->number
);
1064 struct cleanup
*cleanups
= make_cleanup (xfree
, prefix
);
1065 val
= catch_exceptions (uiout
, insert_catchpoint
, bpt
->owner
, prefix
,
1067 do_cleanups (cleanups
);
1069 bpt
->owner
->enable_state
= bp_disabled
;
1073 /* We've already printed an error message if there was a problem
1074 inserting this catchpoint, and we've disabled the catchpoint,
1075 so just return success. */
1082 /* insert_breakpoints is used when starting or continuing the program.
1083 remove_breakpoints is used when the program stops.
1084 Both return zero if successful,
1085 or an `errno' value if could not write the inferior. */
1088 insert_breakpoints (void)
1090 struct bp_location
*b
, *temp
;
1091 int return_val
= 0; /* return success code. */
1093 int disabled_breaks
= 0;
1094 int hw_breakpoint_error
= 0;
1095 int process_warning
= 0;
1097 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1098 make_cleanup_ui_file_delete (tmp_error_stream
);
1100 /* Explicitly mark the warning -- this will only be printed if
1101 there was an error. */
1102 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1104 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1106 /* Permanent breakpoints cannot be inserted or removed. Disabled
1107 breakpoints should not be inserted. */
1108 if (!breakpoint_enabled (b
->owner
))
1111 /* FIXME drow/2003-10-07: This code should be pushed elsewhere when
1112 hardware watchpoints are split into multiple loc breakpoints. */
1113 if ((b
->loc_type
== bp_loc_hardware_watchpoint
1114 || b
->owner
->type
== bp_watchpoint
) && !b
->owner
->val
)
1117 val
= evaluate_expression (b
->owner
->exp
);
1118 release_value (val
);
1119 if (VALUE_LAZY (val
))
1120 value_fetch_lazy (val
);
1121 b
->owner
->val
= val
;
1124 val
= insert_bp_location (b
, tmp_error_stream
,
1125 &disabled_breaks
, &process_warning
,
1126 &hw_breakpoint_error
);
1133 /* If a hardware breakpoint or watchpoint was inserted, add a
1134 message about possibly exhausted resources. */
1135 if (hw_breakpoint_error
)
1137 fprintf_unfiltered (tmp_error_stream
,
1138 "Could not insert hardware breakpoints:\n\
1139 You may have requested too many hardware breakpoints/watchpoints.\n");
1141 #ifdef ONE_PROCESS_WRITETEXT
1142 if (process_warning
)
1143 fprintf_unfiltered (tmp_error_stream
,
1144 "The same program may be running in another process.");
1146 target_terminal_ours_for_output ();
1147 error_stream (tmp_error_stream
);
1153 remove_breakpoints (void)
1155 struct bp_location
*b
;
1158 ALL_BP_LOCATIONS (b
)
1162 val
= remove_breakpoint (b
, mark_uninserted
);
1171 remove_hw_watchpoints (void)
1173 struct bp_location
*b
;
1176 ALL_BP_LOCATIONS (b
)
1178 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1180 val
= remove_breakpoint (b
, mark_uninserted
);
1189 reattach_breakpoints (int pid
)
1191 struct bp_location
*b
;
1193 struct cleanup
*old_chain
= save_inferior_ptid ();
1195 /* Set inferior_ptid; remove_breakpoint uses this global. */
1196 inferior_ptid
= pid_to_ptid (pid
);
1197 ALL_BP_LOCATIONS (b
)
1201 remove_breakpoint (b
, mark_inserted
);
1202 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1203 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1205 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1206 /* FIXME drow/2003-10-07: This doesn't handle any other kinds of
1207 breakpoints. It's wrong for watchpoints, for example. */
1210 do_cleanups (old_chain
);
1215 do_cleanups (old_chain
);
1220 update_breakpoints_after_exec (void)
1222 struct breakpoint
*b
;
1223 struct breakpoint
*temp
;
1225 /* Doing this first prevents the badness of having delete_breakpoint()
1226 write a breakpoint's current "shadow contents" to lift the bp. That
1227 shadow is NOT valid after an exec()! */
1228 mark_breakpoints_out ();
1230 ALL_BREAKPOINTS_SAFE (b
, temp
)
1232 /* Solib breakpoints must be explicitly reset after an exec(). */
1233 if (b
->type
== bp_shlib_event
)
1235 delete_breakpoint (b
);
1239 /* Thread event breakpoints must be set anew after an exec(),
1240 as must overlay event breakpoints. */
1241 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1243 delete_breakpoint (b
);
1247 /* Step-resume breakpoints are meaningless after an exec(). */
1248 if (b
->type
== bp_step_resume
)
1250 delete_breakpoint (b
);
1254 /* Ditto the sigtramp handler breakpoints. */
1255 if (b
->type
== bp_through_sigtramp
)
1257 delete_breakpoint (b
);
1261 /* Ditto the exception-handling catchpoints. */
1262 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1264 delete_breakpoint (b
);
1268 /* Don't delete an exec catchpoint, because else the inferior
1269 won't stop when it ought!
1271 Similarly, we probably ought to keep vfork catchpoints, 'cause
1272 on this target, we may not be able to stop when the vfork is
1273 seen, but only when the subsequent exec is seen. (And because
1274 deleting fork catchpoints here but not vfork catchpoints will
1275 seem mysterious to users, keep those too.)
1277 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1278 target address field, if any, is sufficient to have it be reset
1279 automagically. Certainly on HP-UX that's true.
1281 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1282 valid code address on some platforms (like the mn10300
1283 simulators). We shouldn't assign any special interpretation to
1284 a breakpoint with a zero address. And in fact, GDB doesn't ---
1285 I can't see what that comment above is talking about. As far
1286 as I can tell, setting the address of a
1287 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1288 is meaningless, since those are implemented with HP-UX kernel
1289 hackery, not by storing breakpoint instructions somewhere. */
1290 if ((b
->type
== bp_catch_exec
) ||
1291 (b
->type
== bp_catch_vfork
) ||
1292 (b
->type
== bp_catch_fork
))
1294 b
->loc
->address
= (CORE_ADDR
) NULL
;
1298 /* bp_finish is a special case. The only way we ought to be able
1299 to see one of these when an exec() has happened, is if the user
1300 caught a vfork, and then said "finish". Ordinarily a finish just
1301 carries them to the call-site of the current callee, by setting
1302 a temporary bp there and resuming. But in this case, the finish
1303 will carry them entirely through the vfork & exec.
1305 We don't want to allow a bp_finish to remain inserted now. But
1306 we can't safely delete it, 'cause finish_command has a handle to
1307 the bp on a bpstat, and will later want to delete it. There's a
1308 chance (and I've seen it happen) that if we delete the bp_finish
1309 here, that its storage will get reused by the time finish_command
1310 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1311 We really must allow finish_command to delete a bp_finish.
1313 In the absense of a general solution for the "how do we know
1314 it's safe to delete something others may have handles to?"
1315 problem, what we'll do here is just uninsert the bp_finish, and
1316 let finish_command delete it.
1318 (We know the bp_finish is "doomed" in the sense that it's
1319 momentary, and will be deleted as soon as finish_command sees
1320 the inferior stopped. So it doesn't matter that the bp's
1321 address is probably bogus in the new a.out, unlike e.g., the
1322 solib breakpoints.) */
1324 if (b
->type
== bp_finish
)
1329 /* Without a symbolic address, we have little hope of the
1330 pre-exec() address meaning the same thing in the post-exec()
1332 if (b
->addr_string
== NULL
)
1334 delete_breakpoint (b
);
1338 /* If this breakpoint has survived the above battery of checks, then
1339 it must have a symbolic address. Be sure that it gets reevaluated
1340 to a target address, rather than reusing the old evaluation.
1342 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1343 for bp_catch_exec and friends, I'm pretty sure this is entirely
1344 unnecessary. A call to breakpoint_re_set_one always recomputes
1345 the breakpoint's address from scratch, or deletes it if it can't.
1346 So I think this assignment could be deleted without effect. */
1347 b
->loc
->address
= (CORE_ADDR
) NULL
;
1349 /* FIXME what about longjmp breakpoints? Re-create them here? */
1350 create_overlay_event_breakpoint ("_ovly_debug_event");
1354 detach_breakpoints (int pid
)
1356 struct bp_location
*b
;
1358 struct cleanup
*old_chain
= save_inferior_ptid ();
1360 if (pid
== PIDGET (inferior_ptid
))
1361 error ("Cannot detach breakpoints of inferior_ptid");
1363 /* Set inferior_ptid; remove_breakpoint uses this global. */
1364 inferior_ptid
= pid_to_ptid (pid
);
1365 ALL_BP_LOCATIONS (b
)
1369 val
= remove_breakpoint (b
, mark_inserted
);
1372 do_cleanups (old_chain
);
1377 do_cleanups (old_chain
);
1382 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1386 if (b
->owner
->enable_state
== bp_permanent
)
1387 /* Permanent breakpoints cannot be inserted or removed. */
1390 if (b
->owner
->type
== bp_none
)
1391 warning ("attempted to remove apparently deleted breakpoint #%d?",
1394 if (b
->loc_type
== bp_loc_software_breakpoint
1395 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1397 /* "Normal" instruction breakpoint: either the standard
1398 trap-instruction bp (bp_breakpoint), or a
1399 bp_hardware_breakpoint. */
1401 /* First check to see if we have to handle an overlay. */
1402 if (overlay_debugging
== ovly_off
1403 || b
->section
== NULL
1404 || !(section_is_overlay (b
->section
)))
1406 /* No overlay handling: just remove the breakpoint. */
1408 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1409 val
= target_remove_hw_breakpoint (b
->address
,
1410 b
->shadow_contents
);
1412 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1416 /* This breakpoint is in an overlay section.
1417 Did we set a breakpoint at the LMA? */
1418 if (!overlay_events_enabled
)
1420 /* Yes -- overlay event support is not active, so we
1421 should have set a breakpoint at the LMA. Remove it.
1423 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1425 /* Ignore any failures: if the LMA is in ROM, we will
1426 have already warned when we failed to insert it. */
1427 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1428 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1430 target_remove_breakpoint (addr
, b
->shadow_contents
);
1432 /* Did we set a breakpoint at the VMA?
1433 If so, we will have marked the breakpoint 'inserted'. */
1436 /* Yes -- remove it. Previously we did not bother to
1437 remove the breakpoint if the section had been
1438 unmapped, but let's not rely on that being safe. We
1439 don't know what the overlay manager might do. */
1440 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1441 val
= target_remove_hw_breakpoint (b
->address
,
1442 b
->shadow_contents
);
1444 val
= target_remove_breakpoint (b
->address
,
1445 b
->shadow_contents
);
1449 /* No -- not inserted, so no need to remove. No error. */
1455 b
->inserted
= (is
== mark_inserted
);
1457 else if (b
->loc_type
== bp_loc_hardware_watchpoint
1458 && breakpoint_enabled (b
->owner
)
1464 b
->inserted
= (is
== mark_inserted
);
1465 /* Walk down the saved value chain. */
1466 for (v
= b
->owner
->val_chain
; v
; v
= v
->next
)
1468 /* For each memory reference remove the watchpoint
1470 if (VALUE_LVAL (v
) == lval_memory
1471 && ! VALUE_LAZY (v
))
1473 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
1475 if (v
== b
->owner
->val_chain
1476 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1477 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1482 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1483 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1485 if (b
->owner
->type
== bp_read_watchpoint
)
1487 else if (b
->owner
->type
== bp_access_watchpoint
)
1490 val
= target_remove_watchpoint (addr
, len
, type
);
1497 /* Failure to remove any of the hardware watchpoints comes here. */
1498 if ((is
== mark_uninserted
) && (b
->inserted
))
1499 warning ("Could not remove hardware watchpoint %d.",
1502 /* Free the saved value chain. We will construct a new one
1503 the next time the watchpoint is inserted. */
1504 for (v
= b
->owner
->val_chain
; v
; v
= n
)
1509 b
->owner
->val_chain
= NULL
;
1511 else if ((b
->owner
->type
== bp_catch_fork
||
1512 b
->owner
->type
== bp_catch_vfork
||
1513 b
->owner
->type
== bp_catch_exec
)
1514 && breakpoint_enabled (b
->owner
)
1518 switch (b
->owner
->type
)
1521 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1523 case bp_catch_vfork
:
1524 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1527 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1530 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1535 b
->inserted
= (is
== mark_inserted
);
1537 else if ((b
->owner
->type
== bp_catch_catch
||
1538 b
->owner
->type
== bp_catch_throw
)
1539 && breakpoint_enabled (b
->owner
)
1543 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1546 b
->inserted
= (is
== mark_inserted
);
1548 else if (ep_is_exception_catchpoint (b
->owner
)
1549 && b
->inserted
/* sometimes previous insert doesn't happen */
1550 && breakpoint_enabled (b
->owner
)
1554 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1558 b
->inserted
= (is
== mark_inserted
);
1564 /* Clear the "inserted" flag in all breakpoints. */
1567 mark_breakpoints_out (void)
1569 struct bp_location
*bpt
;
1571 ALL_BP_LOCATIONS (bpt
)
1575 /* Clear the "inserted" flag in all breakpoints and delete any
1576 breakpoints which should go away between runs of the program.
1578 Plus other such housekeeping that has to be done for breakpoints
1581 Note: this function gets called at the end of a run (by
1582 generic_mourn_inferior) and when a run begins (by
1583 init_wait_for_inferior). */
1588 breakpoint_init_inferior (enum inf_context context
)
1590 struct breakpoint
*b
, *temp
;
1591 struct bp_location
*bpt
;
1592 static int warning_needed
= 0;
1594 ALL_BP_LOCATIONS (bpt
)
1597 ALL_BREAKPOINTS_SAFE (b
, temp
)
1602 case bp_watchpoint_scope
:
1604 /* If the call dummy breakpoint is at the entry point it will
1605 cause problems when the inferior is rerun, so we better
1608 Also get rid of scope breakpoints. */
1609 delete_breakpoint (b
);
1613 case bp_hardware_watchpoint
:
1614 case bp_read_watchpoint
:
1615 case bp_access_watchpoint
:
1617 /* Likewise for watchpoints on local expressions. */
1618 if (b
->exp_valid_block
!= NULL
)
1619 delete_breakpoint (b
);
1620 if (context
== inf_starting
)
1622 /* Reset val field to force reread of starting value
1623 in insert_breakpoints. */
1625 value_free (b
->val
);
1630 /* Likewise for exception catchpoints in dynamic-linked
1631 executables where required */
1632 if (ep_is_exception_catchpoint (b
) &&
1633 exception_catchpoints_are_fragile
)
1636 delete_breakpoint (b
);
1642 if (exception_catchpoints_are_fragile
)
1643 exception_support_initialized
= 0;
1645 /* Don't issue the warning unless it's really needed... */
1646 if (warning_needed
&& (context
!= inf_exited
))
1648 warning ("Exception catchpoints from last run were deleted.");
1649 warning ("You must reinsert them explicitly.");
1654 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1655 exists at PC. It returns ordinary_breakpoint_here if it's an
1656 ordinary breakpoint, or permanent_breakpoint_here if it's a
1657 permanent breakpoint.
1658 - When continuing from a location with an ordinary breakpoint, we
1659 actually single step once before calling insert_breakpoints.
1660 - When continuing from a localion with a permanent breakpoint, we
1661 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1662 the target, to advance the PC past the breakpoint. */
1664 enum breakpoint_here
1665 breakpoint_here_p (CORE_ADDR pc
)
1667 struct bp_location
*bpt
;
1668 int any_breakpoint_here
= 0;
1670 ALL_BP_LOCATIONS (bpt
)
1672 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1673 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1676 if ((breakpoint_enabled (bpt
->owner
)
1677 || bpt
->owner
->enable_state
== bp_permanent
)
1678 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1680 if (overlay_debugging
1681 && section_is_overlay (bpt
->section
)
1682 && !section_is_mapped (bpt
->section
))
1683 continue; /* unmapped overlay -- can't be a match */
1684 else if (bpt
->owner
->enable_state
== bp_permanent
)
1685 return permanent_breakpoint_here
;
1687 any_breakpoint_here
= 1;
1691 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1695 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1696 but it only returns true if there is actually a breakpoint inserted
1700 breakpoint_inserted_here_p (CORE_ADDR pc
)
1702 struct bp_location
*bpt
;
1704 ALL_BP_LOCATIONS (bpt
)
1706 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1707 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1711 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1713 if (overlay_debugging
1714 && section_is_overlay (bpt
->section
)
1715 && !section_is_mapped (bpt
->section
))
1716 continue; /* unmapped overlay -- can't be a match */
1725 /* This function returns non-zero iff there is a software breakpoint
1729 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1731 struct bp_location
*bpt
;
1732 int any_breakpoint_here
= 0;
1734 ALL_BP_LOCATIONS (bpt
)
1736 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1739 if ((breakpoint_enabled (bpt
->owner
)
1740 || bpt
->owner
->enable_state
== bp_permanent
)
1742 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1744 if (overlay_debugging
1745 && section_is_overlay (bpt
->section
)
1746 && !section_is_mapped (bpt
->section
))
1747 continue; /* unmapped overlay -- can't be a match */
1756 /* Return nonzero if FRAME is a dummy frame. We can't use
1757 DEPRECATED_PC_IN_CALL_DUMMY because figuring out the saved SP would
1758 take too much time, at least using frame_register() on the 68k.
1759 This means that for this function to work right a port must use the
1760 bp_call_dummy breakpoint. */
1763 deprecated_frame_in_dummy (struct frame_info
*frame
)
1765 struct breakpoint
*b
;
1767 /* This function is used by two files: get_frame_type(), after first
1768 checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and
1769 sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */
1770 gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES
);
1774 if (b
->type
== bp_call_dummy
1775 && frame_id_eq (b
->frame_id
, get_frame_id (frame
))
1776 /* We need to check the PC as well as the frame on the sparc,
1777 for signals.exp in the testsuite. */
1778 && (get_frame_pc (frame
)
1780 - DEPRECATED_SIZEOF_CALL_DUMMY_WORDS
/ sizeof (LONGEST
) * DEPRECATED_REGISTER_SIZE
))
1781 && get_frame_pc (frame
) <= b
->loc
->address
)
1787 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1788 PC is valid for process/thread PTID. */
1791 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1793 struct bp_location
*bpt
;
1796 thread
= pid_to_thread_id (ptid
);
1798 ALL_BP_LOCATIONS (bpt
)
1800 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1801 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1804 if ((breakpoint_enabled (bpt
->owner
)
1805 || bpt
->owner
->enable_state
== bp_permanent
)
1806 && bpt
->address
== pc
1807 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1809 if (overlay_debugging
1810 && section_is_overlay (bpt
->section
)
1811 && !section_is_mapped (bpt
->section
))
1812 continue; /* unmapped overlay -- can't be a match */
1822 /* bpstat stuff. External routines' interfaces are documented
1826 ep_is_catchpoint (struct breakpoint
*ep
)
1829 (ep
->type
== bp_catch_load
)
1830 || (ep
->type
== bp_catch_unload
)
1831 || (ep
->type
== bp_catch_fork
)
1832 || (ep
->type
== bp_catch_vfork
)
1833 || (ep
->type
== bp_catch_exec
)
1834 || (ep
->type
== bp_catch_catch
)
1835 || (ep
->type
== bp_catch_throw
);
1837 /* ??rehrauer: Add more kinds here, as are implemented... */
1841 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1844 (ep
->type
== bp_catch_load
)
1845 || (ep
->type
== bp_catch_unload
);
1849 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1852 (ep
->type
== bp_catch_catch
)
1853 || (ep
->type
== bp_catch_throw
);
1856 /* Clear a bpstat so that it says we are not at any breakpoint.
1857 Also free any storage that is part of a bpstat. */
1860 bpstat_clear (bpstat
*bsp
)
1871 if (p
->old_val
!= NULL
)
1872 value_free (p
->old_val
);
1873 free_command_lines (&p
->commands
);
1880 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1881 is part of the bpstat is copied as well. */
1884 bpstat_copy (bpstat bs
)
1888 bpstat retval
= NULL
;
1893 for (; bs
!= NULL
; bs
= bs
->next
)
1895 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1896 memcpy (tmp
, bs
, sizeof (*tmp
));
1897 if (bs
->commands
!= NULL
)
1898 tmp
->commands
= copy_command_lines (bs
->commands
);
1899 if (bs
->old_val
!= NULL
)
1900 tmp
->old_val
= value_copy (bs
->old_val
);
1903 /* This is the first thing in the chain. */
1913 /* Find the bpstat associated with this breakpoint */
1916 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1921 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1923 if (bsp
->breakpoint_at
== breakpoint
)
1929 /* Find a step_resume breakpoint associated with this bpstat.
1930 (If there are multiple step_resume bp's on the list, this function
1931 will arbitrarily pick one.)
1933 It is an error to use this function if BPSTAT doesn't contain a
1934 step_resume breakpoint.
1936 See wait_for_inferior's use of this function. */
1938 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1943 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1945 current_thread
= pid_to_thread_id (inferior_ptid
);
1947 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1949 if ((bsp
->breakpoint_at
!= NULL
) &&
1950 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1951 (bsp
->breakpoint_at
->thread
== current_thread
||
1952 bsp
->breakpoint_at
->thread
== -1))
1953 return bsp
->breakpoint_at
;
1956 error ("Internal error (no step_resume breakpoint found)");
1960 /* Return the breakpoint number of the first breakpoint we are stopped
1961 at. *BSP upon return is a bpstat which points to the remaining
1962 breakpoints stopped at (but which is not guaranteed to be good for
1963 anything but further calls to bpstat_num).
1964 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1967 bpstat_num (bpstat
*bsp
)
1969 struct breakpoint
*b
;
1972 return 0; /* No more breakpoint values */
1975 b
= (*bsp
)->breakpoint_at
;
1976 *bsp
= (*bsp
)->next
;
1978 return -1; /* breakpoint that's been deleted since */
1980 return b
->number
; /* We have its number */
1984 /* Modify BS so that the actions will not be performed. */
1987 bpstat_clear_actions (bpstat bs
)
1989 for (; bs
!= NULL
; bs
= bs
->next
)
1991 free_command_lines (&bs
->commands
);
1992 if (bs
->old_val
!= NULL
)
1994 value_free (bs
->old_val
);
2000 /* Stub for cleaning up our state if we error-out of a breakpoint command */
2002 cleanup_executing_breakpoints (void *ignore
)
2004 executing_breakpoint_commands
= 0;
2007 /* Execute all the commands associated with all the breakpoints at this
2008 location. Any of these commands could cause the process to proceed
2009 beyond this point, etc. We look out for such changes by checking
2010 the global "breakpoint_proceeded" after each command. */
2013 bpstat_do_actions (bpstat
*bsp
)
2016 struct cleanup
*old_chain
;
2018 /* Avoid endless recursion if a `source' command is contained
2020 if (executing_breakpoint_commands
)
2023 executing_breakpoint_commands
= 1;
2024 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2027 /* Note that (as of this writing), our callers all appear to
2028 be passing us the address of global stop_bpstat. And, if
2029 our calls to execute_control_command cause the inferior to
2030 proceed, that global (and hence, *bsp) will change.
2032 We must be careful to not touch *bsp unless the inferior
2033 has not proceeded. */
2035 /* This pointer will iterate over the list of bpstat's. */
2038 breakpoint_proceeded
= 0;
2039 for (; bs
!= NULL
; bs
= bs
->next
)
2041 struct command_line
*cmd
;
2042 struct cleanup
*this_cmd_tree_chain
;
2044 /* Take ownership of the BSP's command tree, if it has one.
2046 The command tree could legitimately contain commands like
2047 'step' and 'next', which call clear_proceed_status, which
2048 frees stop_bpstat's command tree. To make sure this doesn't
2049 free the tree we're executing out from under us, we need to
2050 take ownership of the tree ourselves. Since a given bpstat's
2051 commands are only executed once, we don't need to copy it; we
2052 can clear the pointer in the bpstat, and make sure we free
2053 the tree when we're done. */
2056 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2060 execute_control_command (cmd
);
2062 if (breakpoint_proceeded
)
2068 /* We can free this command tree now. */
2069 do_cleanups (this_cmd_tree_chain
);
2071 if (breakpoint_proceeded
)
2072 /* The inferior is proceeded by the command; bomb out now.
2073 The bpstat chain has been blown away by wait_for_inferior.
2074 But since execution has stopped again, there is a new bpstat
2075 to look at, so start over. */
2078 do_cleanups (old_chain
);
2081 /* This is the normal print function for a bpstat. In the future,
2082 much of this logic could (should?) be moved to bpstat_stop_status,
2083 by having it set different print_it values.
2085 Current scheme: When we stop, bpstat_print() is called. It loops
2086 through the bpstat list of things causing this stop, calling the
2087 print_bp_stop_message function on each one. The behavior of the
2088 print_bp_stop_message function depends on the print_it field of
2089 bpstat. If such field so indicates, call this function here.
2091 Return values from this routine (ultimately used by bpstat_print()
2092 and normal_stop() to decide what to do):
2093 PRINT_NOTHING: Means we already printed all we needed to print,
2094 don't print anything else.
2095 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2096 that something to be followed by a location.
2097 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2098 that something to be followed by a location.
2099 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2102 static enum print_stop_action
2103 print_it_typical (bpstat bs
)
2105 struct cleanup
*old_chain
, *ui_out_chain
;
2106 struct ui_stream
*stb
;
2107 stb
= ui_out_stream_new (uiout
);
2108 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2109 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2110 which has since been deleted. */
2111 if (bs
->breakpoint_at
== NULL
)
2112 return PRINT_UNKNOWN
;
2114 switch (bs
->breakpoint_at
->type
)
2117 case bp_hardware_breakpoint
:
2118 if (bs
->breakpoint_at
->loc
->address
!= bs
->breakpoint_at
->loc
->requested_address
)
2119 breakpoint_adjustment_warning (bs
->breakpoint_at
->loc
->requested_address
,
2120 bs
->breakpoint_at
->loc
->address
,
2121 bs
->breakpoint_at
->number
, 1);
2122 annotate_breakpoint (bs
->breakpoint_at
->number
);
2123 ui_out_text (uiout
, "\nBreakpoint ");
2124 if (ui_out_is_mi_like_p (uiout
))
2125 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2126 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2127 ui_out_text (uiout
, ", ");
2128 return PRINT_SRC_AND_LOC
;
2131 case bp_shlib_event
:
2132 /* Did we stop because the user set the stop_on_solib_events
2133 variable? (If so, we report this as a generic, "Stopped due
2134 to shlib event" message.) */
2135 printf_filtered ("Stopped due to shared library event\n");
2136 return PRINT_NOTHING
;
2139 case bp_thread_event
:
2140 /* Not sure how we will get here.
2141 GDB should not stop for these breakpoints. */
2142 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2143 return PRINT_NOTHING
;
2146 case bp_overlay_event
:
2147 /* By analogy with the thread event, GDB should not stop for these. */
2148 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2149 return PRINT_NOTHING
;
2153 annotate_catchpoint (bs
->breakpoint_at
->number
);
2154 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2155 printf_filtered ("loaded");
2156 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2157 return PRINT_SRC_AND_LOC
;
2160 case bp_catch_unload
:
2161 annotate_catchpoint (bs
->breakpoint_at
->number
);
2162 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2163 printf_filtered ("unloaded");
2164 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2165 return PRINT_SRC_AND_LOC
;
2169 annotate_catchpoint (bs
->breakpoint_at
->number
);
2170 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2171 printf_filtered ("forked");
2172 printf_filtered (" process %d), ",
2173 bs
->breakpoint_at
->forked_inferior_pid
);
2174 return PRINT_SRC_AND_LOC
;
2177 case bp_catch_vfork
:
2178 annotate_catchpoint (bs
->breakpoint_at
->number
);
2179 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2180 printf_filtered ("vforked");
2181 printf_filtered (" process %d), ",
2182 bs
->breakpoint_at
->forked_inferior_pid
);
2183 return PRINT_SRC_AND_LOC
;
2187 annotate_catchpoint (bs
->breakpoint_at
->number
);
2188 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2189 bs
->breakpoint_at
->number
,
2190 bs
->breakpoint_at
->exec_pathname
);
2191 return PRINT_SRC_AND_LOC
;
2194 case bp_catch_catch
:
2195 if (current_exception_event
&&
2196 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2198 annotate_catchpoint (bs
->breakpoint_at
->number
);
2199 printf_filtered ("\nCatchpoint %d (exception caught), ",
2200 bs
->breakpoint_at
->number
);
2201 printf_filtered ("throw location ");
2202 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2203 printf_filtered ("%s:%d",
2204 CURRENT_EXCEPTION_THROW_FILE
,
2205 CURRENT_EXCEPTION_THROW_LINE
);
2207 printf_filtered ("unknown");
2209 printf_filtered (", catch location ");
2210 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2211 printf_filtered ("%s:%d",
2212 CURRENT_EXCEPTION_CATCH_FILE
,
2213 CURRENT_EXCEPTION_CATCH_LINE
);
2215 printf_filtered ("unknown");
2217 printf_filtered ("\n");
2218 /* don't bother to print location frame info */
2219 return PRINT_SRC_ONLY
;
2223 /* really throw, some other bpstat will handle it */
2224 return PRINT_UNKNOWN
;
2228 case bp_catch_throw
:
2229 if (current_exception_event
&&
2230 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2232 annotate_catchpoint (bs
->breakpoint_at
->number
);
2233 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2234 bs
->breakpoint_at
->number
);
2235 printf_filtered ("throw location ");
2236 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2237 printf_filtered ("%s:%d",
2238 CURRENT_EXCEPTION_THROW_FILE
,
2239 CURRENT_EXCEPTION_THROW_LINE
);
2241 printf_filtered ("unknown");
2243 printf_filtered (", catch location ");
2244 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2245 printf_filtered ("%s:%d",
2246 CURRENT_EXCEPTION_CATCH_FILE
,
2247 CURRENT_EXCEPTION_CATCH_LINE
);
2249 printf_filtered ("unknown");
2251 printf_filtered ("\n");
2252 /* don't bother to print location frame info */
2253 return PRINT_SRC_ONLY
;
2257 /* really catch, some other bpstat will handle it */
2258 return PRINT_UNKNOWN
;
2263 case bp_hardware_watchpoint
:
2264 if (bs
->old_val
!= NULL
)
2266 annotate_watchpoint (bs
->breakpoint_at
->number
);
2267 if (ui_out_is_mi_like_p (uiout
))
2268 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2269 mention (bs
->breakpoint_at
);
2270 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2271 ui_out_text (uiout
, "\nOld value = ");
2272 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2273 ui_out_field_stream (uiout
, "old", stb
);
2274 ui_out_text (uiout
, "\nNew value = ");
2275 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2276 ui_out_field_stream (uiout
, "new", stb
);
2277 do_cleanups (ui_out_chain
);
2278 ui_out_text (uiout
, "\n");
2279 value_free (bs
->old_val
);
2282 /* More than one watchpoint may have been triggered. */
2283 return PRINT_UNKNOWN
;
2286 case bp_read_watchpoint
:
2287 if (ui_out_is_mi_like_p (uiout
))
2288 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2289 mention (bs
->breakpoint_at
);
2290 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2291 ui_out_text (uiout
, "\nValue = ");
2292 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2293 ui_out_field_stream (uiout
, "value", stb
);
2294 do_cleanups (ui_out_chain
);
2295 ui_out_text (uiout
, "\n");
2296 return PRINT_UNKNOWN
;
2299 case bp_access_watchpoint
:
2300 if (bs
->old_val
!= NULL
)
2302 annotate_watchpoint (bs
->breakpoint_at
->number
);
2303 if (ui_out_is_mi_like_p (uiout
))
2304 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2305 mention (bs
->breakpoint_at
);
2306 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2307 ui_out_text (uiout
, "\nOld value = ");
2308 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2309 ui_out_field_stream (uiout
, "old", stb
);
2310 value_free (bs
->old_val
);
2312 ui_out_text (uiout
, "\nNew value = ");
2316 mention (bs
->breakpoint_at
);
2317 if (ui_out_is_mi_like_p (uiout
))
2318 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2319 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2320 ui_out_text (uiout
, "\nValue = ");
2322 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2323 ui_out_field_stream (uiout
, "new", stb
);
2324 do_cleanups (ui_out_chain
);
2325 ui_out_text (uiout
, "\n");
2326 return PRINT_UNKNOWN
;
2329 /* Fall through, we don't deal with these types of breakpoints
2333 if (ui_out_is_mi_like_p (uiout
))
2334 ui_out_field_string (uiout
, "reason", "function-finished");
2335 return PRINT_UNKNOWN
;
2339 if (ui_out_is_mi_like_p (uiout
))
2340 ui_out_field_string (uiout
, "reason", "location-reached");
2341 return PRINT_UNKNOWN
;
2346 case bp_longjmp_resume
:
2347 case bp_step_resume
:
2348 case bp_through_sigtramp
:
2349 case bp_watchpoint_scope
:
2352 return PRINT_UNKNOWN
;
2356 /* Generic routine for printing messages indicating why we
2357 stopped. The behavior of this function depends on the value
2358 'print_it' in the bpstat structure. Under some circumstances we
2359 may decide not to print anything here and delegate the task to
2362 static enum print_stop_action
2363 print_bp_stop_message (bpstat bs
)
2365 switch (bs
->print_it
)
2368 /* Nothing should be printed for this bpstat entry. */
2369 return PRINT_UNKNOWN
;
2373 /* We still want to print the frame, but we already printed the
2374 relevant messages. */
2375 return PRINT_SRC_AND_LOC
;
2378 case print_it_normal
:
2379 /* Normal case. Call the breakpoint's print_it method, or
2380 print_it_typical. */
2381 if (bs
->breakpoint_at
!= NULL
&& bs
->breakpoint_at
->ops
!= NULL
2382 && bs
->breakpoint_at
->ops
->print_it
!= NULL
)
2383 return bs
->breakpoint_at
->ops
->print_it (bs
->breakpoint_at
);
2385 return print_it_typical (bs
);
2389 internal_error (__FILE__
, __LINE__
,
2390 "print_bp_stop_message: unrecognized enum value");
2395 /* Print a message indicating what happened. This is called from
2396 normal_stop(). The input to this routine is the head of the bpstat
2397 list - a list of the eventpoints that caused this stop. This
2398 routine calls the generic print routine for printing a message
2399 about reasons for stopping. This will print (for example) the
2400 "Breakpoint n," part of the output. The return value of this
2403 PRINT_UNKNOWN: Means we printed nothing
2404 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2405 code to print the location. An example is
2406 "Breakpoint 1, " which should be followed by
2408 PRINT_SRC_ONLY: Means we printed something, but there is no need
2409 to also print the location part of the message.
2410 An example is the catch/throw messages, which
2411 don't require a location appended to the end.
2412 PRINT_NOTHING: We have done some printing and we don't need any
2413 further info to be printed.*/
2415 enum print_stop_action
2416 bpstat_print (bpstat bs
)
2420 /* Maybe another breakpoint in the chain caused us to stop.
2421 (Currently all watchpoints go on the bpstat whether hit or not.
2422 That probably could (should) be changed, provided care is taken
2423 with respect to bpstat_explains_signal). */
2424 for (; bs
; bs
= bs
->next
)
2426 val
= print_bp_stop_message (bs
);
2427 if (val
== PRINT_SRC_ONLY
2428 || val
== PRINT_SRC_AND_LOC
2429 || val
== PRINT_NOTHING
)
2433 /* We reached the end of the chain, or we got a null BS to start
2434 with and nothing was printed. */
2435 return PRINT_UNKNOWN
;
2438 /* Evaluate the expression EXP and return 1 if value is zero.
2439 This is used inside a catch_errors to evaluate the breakpoint condition.
2440 The argument is a "struct expression *" that has been cast to char * to
2441 make it pass through catch_errors. */
2444 breakpoint_cond_eval (void *exp
)
2446 struct value
*mark
= value_mark ();
2447 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2448 value_free_to_mark (mark
);
2452 /* Allocate a new bpstat and chain it to the current one. */
2455 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2459 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2461 bs
->breakpoint_at
= b
;
2462 /* If the condition is false, etc., don't do the commands. */
2463 bs
->commands
= NULL
;
2465 bs
->print_it
= print_it_normal
;
2469 /* Possible return values for watchpoint_check (this can't be an enum
2470 because of check_errors). */
2471 /* The watchpoint has been deleted. */
2472 #define WP_DELETED 1
2473 /* The value has changed. */
2474 #define WP_VALUE_CHANGED 2
2475 /* The value has not changed. */
2476 #define WP_VALUE_NOT_CHANGED 3
2478 #define BP_TEMPFLAG 1
2479 #define BP_HARDWAREFLAG 2
2481 /* Check watchpoint condition. */
2484 watchpoint_check (void *p
)
2486 bpstat bs
= (bpstat
) p
;
2487 struct breakpoint
*b
;
2488 struct frame_info
*fr
;
2489 int within_current_scope
;
2491 b
= bs
->breakpoint_at
;
2493 if (b
->exp_valid_block
== NULL
)
2494 within_current_scope
= 1;
2497 /* There is no current frame at this moment. If we're going to have
2498 any chance of handling watchpoints on local variables, we'll need
2499 the frame chain (so we can determine if we're in scope). */
2500 reinit_frame_cache ();
2501 fr
= frame_find_by_id (b
->watchpoint_frame
);
2502 within_current_scope
= (fr
!= NULL
);
2503 /* in_function_epilogue_p() returns a non-zero value if we're still
2504 in the function but the stack frame has already been invalidated.
2505 Since we can't rely on the values of local variables after the
2506 stack has been destroyed, we are treating the watchpoint in that
2507 state as `not changed' without further checking.
2509 vinschen/2003-09-04: The former implementation left out the case
2510 that the watchpoint frame couldn't be found by frame_find_by_id()
2511 because the current PC is currently in an epilogue. Calling
2512 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2513 if ((!within_current_scope
|| fr
== get_current_frame ())
2514 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2515 return WP_VALUE_NOT_CHANGED
;
2516 if (fr
&& within_current_scope
)
2517 /* If we end up stopping, the current frame will get selected
2518 in normal_stop. So this call to select_frame won't affect
2523 if (within_current_scope
)
2525 /* We use value_{,free_to_}mark because it could be a
2526 *long* time before we return to the command level and
2527 call free_all_values. We can't call free_all_values because
2528 we might be in the middle of evaluating a function call. */
2530 struct value
*mark
= value_mark ();
2531 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2532 if (!value_equal (b
->val
, new_val
))
2534 release_value (new_val
);
2535 value_free_to_mark (mark
);
2536 bs
->old_val
= b
->val
;
2538 /* We will stop here */
2539 return WP_VALUE_CHANGED
;
2543 /* Nothing changed, don't do anything. */
2544 value_free_to_mark (mark
);
2545 /* We won't stop here */
2546 return WP_VALUE_NOT_CHANGED
;
2551 /* This seems like the only logical thing to do because
2552 if we temporarily ignored the watchpoint, then when
2553 we reenter the block in which it is valid it contains
2554 garbage (in the case of a function, it may have two
2555 garbage values, one before and one after the prologue).
2556 So we can't even detect the first assignment to it and
2557 watch after that (since the garbage may or may not equal
2558 the first value assigned). */
2559 /* We print all the stop information in print_it_typical(), but
2560 in this case, by the time we call print_it_typical() this bp
2561 will be deleted already. So we have no choice but print the
2562 information here. */
2563 if (ui_out_is_mi_like_p (uiout
))
2564 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2565 ui_out_text (uiout
, "\nWatchpoint ");
2566 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2567 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2568 which its expression is valid.\n");
2570 if (b
->related_breakpoint
)
2571 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2572 b
->disposition
= disp_del_at_next_stop
;
2578 /* Get a bpstat associated with having just stopped at address
2581 /* Determine whether we stopped at a breakpoint, etc, or whether we
2582 don't understand this stop. Result is a chain of bpstat's such that:
2584 if we don't understand the stop, the result is a null pointer.
2586 if we understand why we stopped, the result is not null.
2588 Each element of the chain refers to a particular breakpoint or
2589 watchpoint at which we have stopped. (We may have stopped for
2590 several reasons concurrently.)
2592 Each element of the chain has valid next, breakpoint_at,
2593 commands, FIXME??? fields. */
2596 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
)
2598 struct breakpoint
*b
, *temp
;
2599 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2600 int real_breakpoint
= 0;
2601 /* Root of the chain of bpstat's */
2602 struct bpstats root_bs
[1];
2603 /* Pointer to the last thing in the chain currently. */
2604 bpstat bs
= root_bs
;
2605 int thread_id
= pid_to_thread_id (ptid
);
2607 ALL_BREAKPOINTS_SAFE (b
, temp
)
2609 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
2612 if (b
->type
!= bp_watchpoint
2613 && b
->type
!= bp_hardware_watchpoint
2614 && b
->type
!= bp_read_watchpoint
2615 && b
->type
!= bp_access_watchpoint
2616 && b
->type
!= bp_hardware_breakpoint
2617 && b
->type
!= bp_catch_fork
2618 && b
->type
!= bp_catch_vfork
2619 && b
->type
!= bp_catch_exec
2620 && b
->type
!= bp_catch_catch
2621 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2623 if (b
->loc
->address
!= bp_addr
) /* address doesn't match */
2625 if (overlay_debugging
/* unmapped overlay section */
2626 && section_is_overlay (b
->loc
->section
)
2627 && !section_is_mapped (b
->loc
->section
))
2631 if (b
->type
== bp_hardware_breakpoint
)
2633 if (b
->loc
->address
!= bp_addr
)
2635 if (overlay_debugging
/* unmapped overlay section */
2636 && section_is_overlay (b
->loc
->section
)
2637 && !section_is_mapped (b
->loc
->section
))
2641 /* Is this a catchpoint of a load or unload? If so, did we
2642 get a load or unload of the specified library? If not,
2644 if ((b
->type
== bp_catch_load
)
2645 #if defined(SOLIB_HAVE_LOAD_EVENT)
2646 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2647 || ((b
->dll_pathname
!= NULL
)
2648 && (strcmp (b
->dll_pathname
,
2649 SOLIB_LOADED_LIBRARY_PATHNAME (
2650 PIDGET (inferior_ptid
)))
2656 if ((b
->type
== bp_catch_unload
)
2657 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2658 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2659 || ((b
->dll_pathname
!= NULL
)
2660 && (strcmp (b
->dll_pathname
,
2661 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2662 PIDGET (inferior_ptid
)))
2668 if ((b
->type
== bp_catch_fork
)
2669 && !inferior_has_forked (PIDGET (inferior_ptid
),
2670 &b
->forked_inferior_pid
))
2673 if ((b
->type
== bp_catch_vfork
)
2674 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2675 &b
->forked_inferior_pid
))
2678 if ((b
->type
== bp_catch_exec
)
2679 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2682 if (ep_is_exception_catchpoint (b
) &&
2683 !(current_exception_event
= target_get_current_exception_event ()))
2686 /* Come here if it's a watchpoint, or if the break address matches */
2688 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2690 /* Watchpoints may change this, if not found to have triggered. */
2694 if (b
->type
== bp_watchpoint
||
2695 b
->type
== bp_hardware_watchpoint
)
2697 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2699 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2700 int e
= catch_errors (watchpoint_check
, bs
, message
,
2702 do_cleanups (cleanups
);
2706 /* We've already printed what needs to be printed. */
2707 /* Actually this is superfluous, because by the time we
2708 call print_it_typical() the wp will be already deleted,
2709 and the function will return immediately. */
2710 bs
->print_it
= print_it_done
;
2713 case WP_VALUE_CHANGED
:
2717 case WP_VALUE_NOT_CHANGED
:
2719 bs
->print_it
= print_it_noop
;
2726 /* Error from catch_errors. */
2727 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2728 if (b
->related_breakpoint
)
2729 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2730 b
->disposition
= disp_del_at_next_stop
;
2731 /* We've already printed what needs to be printed. */
2732 bs
->print_it
= print_it_done
;
2738 else if (b
->type
== bp_read_watchpoint
||
2739 b
->type
== bp_access_watchpoint
)
2745 addr
= target_stopped_data_address ();
2748 for (v
= b
->val_chain
; v
; v
= v
->next
)
2750 if (VALUE_LVAL (v
) == lval_memory
2751 && ! VALUE_LAZY (v
))
2753 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
2755 if (v
== b
->val_chain
2756 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2757 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2761 vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
2762 /* Exact match not required. Within range is
2764 if (addr
>= vaddr
&&
2765 addr
< vaddr
+ TYPE_LENGTH (VALUE_TYPE (v
)))
2772 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2774 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2775 int e
= catch_errors (watchpoint_check
, bs
, message
,
2777 do_cleanups (cleanups
);
2781 /* We've already printed what needs to be printed. */
2782 bs
->print_it
= print_it_done
;
2785 case WP_VALUE_CHANGED
:
2786 if (b
->type
== bp_read_watchpoint
)
2788 /* Don't stop: read watchpoints shouldn't fire if
2789 the value has changed. This is for targets
2790 which cannot set read-only watchpoints. */
2791 bs
->print_it
= print_it_noop
;
2797 case WP_VALUE_NOT_CHANGED
:
2804 /* Error from catch_errors. */
2805 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2806 if (b
->related_breakpoint
)
2807 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2808 b
->disposition
= disp_del_at_next_stop
;
2809 /* We've already printed what needs to be printed. */
2810 bs
->print_it
= print_it_done
;
2814 else /* found == 0 */
2816 /* This is a case where some watchpoint(s) triggered,
2817 but not at the address of this watchpoint (FOUND
2818 was left zero). So don't print anything for this
2820 bs
->print_it
= print_it_noop
;
2827 /* By definition, an encountered breakpoint is a triggered
2831 real_breakpoint
= 1;
2834 if (frame_id_p (b
->frame_id
)
2835 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2839 int value_is_zero
= 0;
2843 /* Need to select the frame, with all that implies
2844 so that the conditions will have the right context. */
2845 select_frame (get_current_frame ());
2847 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2848 "Error in testing breakpoint condition:\n",
2850 /* FIXME-someday, should give breakpoint # */
2853 if (b
->cond
&& value_is_zero
)
2856 /* Don't consider this a hit. */
2859 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2862 /* Don't consider this a hit. */
2865 else if (b
->ignore_count
> 0)
2868 annotate_ignore_count_change ();
2873 /* We will stop here */
2874 if (b
->disposition
== disp_disable
)
2875 b
->enable_state
= bp_disabled
;
2878 bs
->commands
= b
->commands
;
2880 (strcmp ("silent", bs
->commands
->line
) == 0
2881 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
2883 bs
->commands
= bs
->commands
->next
;
2886 bs
->commands
= copy_command_lines (bs
->commands
);
2889 /* Print nothing for this entry if we dont stop or if we dont print. */
2890 if (bs
->stop
== 0 || bs
->print
== 0)
2891 bs
->print_it
= print_it_noop
;
2894 bs
->next
= NULL
; /* Terminate the chain */
2895 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2897 /* The value of a hardware watchpoint hasn't changed, but the
2898 intermediate memory locations we are watching may have. */
2899 if (bs
&& !bs
->stop
&&
2900 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2901 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2902 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2904 remove_breakpoints ();
2905 insert_breakpoints ();
2910 /* Tell what to do about this bpstat. */
2912 bpstat_what (bpstat bs
)
2914 /* Classify each bpstat as one of the following. */
2917 /* This bpstat element has no effect on the main_action. */
2920 /* There was a watchpoint, stop but don't print. */
2923 /* There was a watchpoint, stop and print. */
2926 /* There was a breakpoint but we're not stopping. */
2929 /* There was a breakpoint, stop but don't print. */
2932 /* There was a breakpoint, stop and print. */
2935 /* We hit the longjmp breakpoint. */
2938 /* We hit the longjmp_resume breakpoint. */
2941 /* We hit the step_resume breakpoint. */
2944 /* We hit the through_sigtramp breakpoint. */
2947 /* We hit the shared library event breakpoint. */
2950 /* We caught a shared library event. */
2953 /* This is just used to count how many enums there are. */
2957 /* Here is the table which drives this routine. So that we can
2958 format it pretty, we define some abbreviations for the
2959 enum bpstat_what codes. */
2960 #define kc BPSTAT_WHAT_KEEP_CHECKING
2961 #define ss BPSTAT_WHAT_STOP_SILENT
2962 #define sn BPSTAT_WHAT_STOP_NOISY
2963 #define sgl BPSTAT_WHAT_SINGLE
2964 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2965 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2966 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2967 #define sr BPSTAT_WHAT_STEP_RESUME
2968 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2969 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2970 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2972 /* "Can't happen." Might want to print an error message.
2973 abort() is not out of the question, but chances are GDB is just
2974 a bit confused, not unusable. */
2975 #define err BPSTAT_WHAT_STOP_NOISY
2977 /* Given an old action and a class, come up with a new action. */
2978 /* One interesting property of this table is that wp_silent is the same
2979 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2980 after stopping, the check for whether to step over a breakpoint
2981 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2982 reference to how we stopped. We retain separate wp_silent and
2983 bp_silent codes in case we want to change that someday.
2985 Another possibly interesting property of this table is that
2986 there's a partial ordering, priority-like, of the actions. Once
2987 you've decided that some action is appropriate, you'll never go
2988 back and decide something of a lower priority is better. The
2991 kc < clr sgl shl shlr slr sn sr ss ts
2992 sgl < clrs shl shlr slr sn sr ss ts
2993 slr < err shl shlr sn sr ss ts
2994 clr < clrs err shl shlr sn sr ss ts
2995 clrs < err shl shlr sn sr ss ts
2996 ss < shl shlr sn sr ts
3003 What I think this means is that we don't need a damned table
3004 here. If you just put the rows and columns in the right order,
3005 it'd look awfully regular. We could simply walk the bpstat list
3006 and choose the highest priority action we find, with a little
3007 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
3008 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
3009 is messy anyway). */
3011 /* step_resume entries: a step resume breakpoint overrides another
3012 breakpoint of signal handling (see comment in wait_for_inferior
3013 at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
3014 /* We handle the through_sigtramp_breakpoint the same way; having both
3015 one of those and a step_resume_breakpoint is probably very rare (?). */
3017 static const enum bpstat_what_main_action
3018 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3021 /* kc ss sn sgl slr clr clrs sr ts shl shlr
3024 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
3026 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3028 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3030 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
3032 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3034 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3036 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
3038 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
3040 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
3042 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
3044 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
3046 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
3061 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3062 struct bpstat_what retval
;
3064 retval
.call_dummy
= 0;
3065 for (; bs
!= NULL
; bs
= bs
->next
)
3067 enum class bs_class
= no_effect
;
3068 if (bs
->breakpoint_at
== NULL
)
3069 /* I suspect this can happen if it was a momentary breakpoint
3070 which has since been deleted. */
3072 switch (bs
->breakpoint_at
->type
)
3078 case bp_hardware_breakpoint
:
3084 bs_class
= bp_noisy
;
3086 bs_class
= bp_silent
;
3089 bs_class
= bp_nostop
;
3092 case bp_hardware_watchpoint
:
3093 case bp_read_watchpoint
:
3094 case bp_access_watchpoint
:
3098 bs_class
= wp_noisy
;
3100 bs_class
= wp_silent
;
3103 /* There was a watchpoint, but we're not stopping.
3104 This requires no further action. */
3105 bs_class
= no_effect
;
3108 bs_class
= long_jump
;
3110 case bp_longjmp_resume
:
3111 bs_class
= long_resume
;
3113 case bp_step_resume
:
3116 bs_class
= step_resume
;
3119 /* It is for the wrong frame. */
3120 bs_class
= bp_nostop
;
3122 case bp_through_sigtramp
:
3123 bs_class
= through_sig
;
3125 case bp_watchpoint_scope
:
3126 bs_class
= bp_nostop
;
3128 case bp_shlib_event
:
3129 bs_class
= shlib_event
;
3131 case bp_thread_event
:
3132 case bp_overlay_event
:
3133 bs_class
= bp_nostop
;
3136 case bp_catch_unload
:
3137 /* Only if this catchpoint triggered should we cause the
3138 step-out-of-dld behaviour. Otherwise, we ignore this
3141 bs_class
= catch_shlib_event
;
3143 bs_class
= no_effect
;
3146 case bp_catch_vfork
:
3151 bs_class
= bp_noisy
;
3153 bs_class
= bp_silent
;
3156 /* There was a catchpoint, but we're not stopping.
3157 This requires no further action. */
3158 bs_class
= no_effect
;
3160 case bp_catch_catch
:
3161 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3162 bs_class
= bp_nostop
;
3164 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3166 case bp_catch_throw
:
3167 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3168 bs_class
= bp_nostop
;
3170 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3173 /* Make sure the action is stop (silent or noisy),
3174 so infrun.c pops the dummy frame. */
3175 bs_class
= bp_silent
;
3176 retval
.call_dummy
= 1;
3179 current_action
= table
[(int) bs_class
][(int) current_action
];
3181 retval
.main_action
= current_action
;
3185 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3186 without hardware support). This isn't related to a specific bpstat,
3187 just to things like whether watchpoints are set. */
3190 bpstat_should_step (void)
3192 struct breakpoint
*b
;
3194 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3199 /* Nonzero if there are enabled hardware watchpoints. */
3201 bpstat_have_active_hw_watchpoints (void)
3203 struct bp_location
*bpt
;
3204 ALL_BP_LOCATIONS (bpt
)
3205 if (breakpoint_enabled (bpt
->owner
)
3207 && bpt
->loc_type
== bp_loc_hardware_watchpoint
)
3213 /* Given a bpstat that records zero or more triggered eventpoints, this
3214 function returns another bpstat which contains only the catchpoints
3215 on that first list, if any. */
3217 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3219 struct bpstats root_bs
[1];
3220 bpstat bs
= root_bs
;
3221 struct breakpoint
*ep
;
3224 bpstat_clear (cp_list
);
3225 root_bs
->next
= NULL
;
3227 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3229 /* Is this eventpoint a catchpoint? If not, ignore it. */
3230 ep
= ep_list
->breakpoint_at
;
3233 if ((ep
->type
!= bp_catch_load
) &&
3234 (ep
->type
!= bp_catch_unload
) &&
3235 (ep
->type
!= bp_catch_catch
) &&
3236 (ep
->type
!= bp_catch_throw
))
3237 /* pai: (temp) ADD fork/vfork here!! */
3240 /* Yes; add it to the list. */
3241 bs
= bpstat_alloc (ep
, bs
);
3246 #if defined(SOLIB_ADD)
3247 /* Also, for each triggered catchpoint, tag it with the name of
3248 the library that caused this trigger. (We copy the name now,
3249 because it's only guaranteed to be available NOW, when the
3250 catchpoint triggers. Clients who may wish to know the name
3251 later must get it from the catchpoint itself.) */
3252 if (ep
->triggered_dll_pathname
!= NULL
)
3253 xfree (ep
->triggered_dll_pathname
);
3254 if (ep
->type
== bp_catch_load
)
3255 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3256 PIDGET (inferior_ptid
));
3258 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3259 PIDGET (inferior_ptid
));
3261 dll_pathname
= NULL
;
3265 ep
->triggered_dll_pathname
= (char *)
3266 xmalloc (strlen (dll_pathname
) + 1);
3267 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3270 ep
->triggered_dll_pathname
= NULL
;
3276 /* Print B to gdb_stdout. */
3278 print_one_breakpoint (struct breakpoint
*b
,
3279 CORE_ADDR
*last_addr
)
3281 struct command_line
*l
;
3283 struct ep_type_description
3288 static struct ep_type_description bptypes
[] =
3290 {bp_none
, "?deleted?"},
3291 {bp_breakpoint
, "breakpoint"},
3292 {bp_hardware_breakpoint
, "hw breakpoint"},
3293 {bp_until
, "until"},
3294 {bp_finish
, "finish"},
3295 {bp_watchpoint
, "watchpoint"},
3296 {bp_hardware_watchpoint
, "hw watchpoint"},
3297 {bp_read_watchpoint
, "read watchpoint"},
3298 {bp_access_watchpoint
, "acc watchpoint"},
3299 {bp_longjmp
, "longjmp"},
3300 {bp_longjmp_resume
, "longjmp resume"},
3301 {bp_step_resume
, "step resume"},
3302 {bp_through_sigtramp
, "sigtramp"},
3303 {bp_watchpoint_scope
, "watchpoint scope"},
3304 {bp_call_dummy
, "call dummy"},
3305 {bp_shlib_event
, "shlib events"},
3306 {bp_thread_event
, "thread events"},
3307 {bp_overlay_event
, "overlay events"},
3308 {bp_catch_load
, "catch load"},
3309 {bp_catch_unload
, "catch unload"},
3310 {bp_catch_fork
, "catch fork"},
3311 {bp_catch_vfork
, "catch vfork"},
3312 {bp_catch_exec
, "catch exec"},
3313 {bp_catch_catch
, "catch catch"},
3314 {bp_catch_throw
, "catch throw"}
3317 static char *bpdisps
[] =
3318 {"del", "dstp", "dis", "keep"};
3319 static char bpenables
[] = "nynny";
3320 char wrap_indent
[80];
3321 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3322 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3323 struct cleanup
*bkpt_chain
;
3326 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3330 ui_out_field_int (uiout
, "number", b
->number
);
3334 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3335 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3336 internal_error (__FILE__
, __LINE__
,
3337 "bptypes table does not describe type #%d.",
3339 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3343 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3347 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3348 ui_out_spaces (uiout
, 2);
3351 strcpy (wrap_indent
, " ");
3354 if (TARGET_ADDR_BIT
<= 32)
3355 strcat (wrap_indent
, " ");
3357 strcat (wrap_indent
, " ");
3360 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3361 b
->ops
->print_one (b
, last_addr
);
3366 internal_error (__FILE__
, __LINE__
,
3367 "print_one_breakpoint: bp_none encountered\n");
3371 case bp_hardware_watchpoint
:
3372 case bp_read_watchpoint
:
3373 case bp_access_watchpoint
:
3374 /* Field 4, the address, is omitted (which makes the columns
3375 not line up too nicely with the headers, but the effect
3376 is relatively readable). */
3378 ui_out_field_skip (uiout
, "addr");
3380 print_expression (b
->exp
, stb
->stream
);
3381 ui_out_field_stream (uiout
, "what", stb
);
3385 case bp_catch_unload
:
3386 /* Field 4, the address, is omitted (which makes the columns
3387 not line up too nicely with the headers, but the effect
3388 is relatively readable). */
3390 ui_out_field_skip (uiout
, "addr");
3392 if (b
->dll_pathname
== NULL
)
3394 ui_out_field_string (uiout
, "what", "<any library>");
3395 ui_out_spaces (uiout
, 1);
3399 ui_out_text (uiout
, "library \"");
3400 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3401 ui_out_text (uiout
, "\" ");
3406 case bp_catch_vfork
:
3407 /* Field 4, the address, is omitted (which makes the columns
3408 not line up too nicely with the headers, but the effect
3409 is relatively readable). */
3411 ui_out_field_skip (uiout
, "addr");
3413 if (b
->forked_inferior_pid
!= 0)
3415 ui_out_text (uiout
, "process ");
3416 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3417 ui_out_spaces (uiout
, 1);
3421 /* Field 4, the address, is omitted (which makes the columns
3422 not line up too nicely with the headers, but the effect
3423 is relatively readable). */
3425 ui_out_field_skip (uiout
, "addr");
3427 if (b
->exec_pathname
!= NULL
)
3429 ui_out_text (uiout
, "program \"");
3430 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3431 ui_out_text (uiout
, "\" ");
3435 case bp_catch_catch
:
3436 /* Field 4, the address, is omitted (which makes the columns
3437 not line up too nicely with the headers, but the effect
3438 is relatively readable). */
3440 ui_out_field_skip (uiout
, "addr");
3442 ui_out_field_string (uiout
, "what", "exception catch");
3443 ui_out_spaces (uiout
, 1);
3446 case bp_catch_throw
:
3447 /* Field 4, the address, is omitted (which makes the columns
3448 not line up too nicely with the headers, but the effect
3449 is relatively readable). */
3451 ui_out_field_skip (uiout
, "addr");
3453 ui_out_field_string (uiout
, "what", "exception throw");
3454 ui_out_spaces (uiout
, 1);
3458 case bp_hardware_breakpoint
:
3462 case bp_longjmp_resume
:
3463 case bp_step_resume
:
3464 case bp_through_sigtramp
:
3465 case bp_watchpoint_scope
:
3467 case bp_shlib_event
:
3468 case bp_thread_event
:
3469 case bp_overlay_event
:
3474 ui_out_field_string (uiout
, "addr", "<PENDING>");
3476 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
3479 *last_addr
= b
->loc
->address
;
3482 sym
= find_pc_sect_function (b
->loc
->address
, b
->loc
->section
);
3485 ui_out_text (uiout
, "in ");
3486 ui_out_field_string (uiout
, "func",
3487 SYMBOL_PRINT_NAME (sym
));
3488 ui_out_wrap_hint (uiout
, wrap_indent
);
3489 ui_out_text (uiout
, " at ");
3491 ui_out_field_string (uiout
, "file", b
->source_file
);
3492 ui_out_text (uiout
, ":");
3493 ui_out_field_int (uiout
, "line", b
->line_number
);
3495 else if (b
->pending
)
3497 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3501 print_address_symbolic (b
->loc
->address
, stb
->stream
, demangle
, "");
3502 ui_out_field_stream (uiout
, "at", stb
);
3507 if (b
->thread
!= -1)
3509 /* FIXME: This seems to be redundant and lost here; see the
3510 "stop only in" line a little further down. */
3511 ui_out_text (uiout
, " thread ");
3512 ui_out_field_int (uiout
, "thread", b
->thread
);
3515 ui_out_text (uiout
, "\n");
3517 if (frame_id_p (b
->frame_id
))
3520 ui_out_text (uiout
, "\tstop only in stack frame at ");
3521 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3523 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3524 ui_out_text (uiout
, "\n");
3530 ui_out_text (uiout
, "\tstop only if ");
3531 print_expression (b
->cond
, stb
->stream
);
3532 ui_out_field_stream (uiout
, "cond", stb
);
3533 ui_out_text (uiout
, "\n");
3536 if (b
->pending
&& b
->cond_string
)
3539 ui_out_text (uiout
, "\tstop only if ");
3540 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3541 ui_out_text (uiout
, "\n");
3544 if (b
->thread
!= -1)
3546 /* FIXME should make an annotation for this */
3547 ui_out_text (uiout
, "\tstop only in thread ");
3548 ui_out_field_int (uiout
, "thread", b
->thread
);
3549 ui_out_text (uiout
, "\n");
3552 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3554 /* FIXME should make an annotation for this */
3555 if (ep_is_catchpoint (b
))
3556 ui_out_text (uiout
, "\tcatchpoint");
3558 ui_out_text (uiout
, "\tbreakpoint");
3559 ui_out_text (uiout
, " already hit ");
3560 ui_out_field_int (uiout
, "times", b
->hit_count
);
3561 if (b
->hit_count
== 1)
3562 ui_out_text (uiout
, " time\n");
3564 ui_out_text (uiout
, " times\n");
3567 /* Output the count also if it is zero, but only if this is
3568 mi. FIXME: Should have a better test for this. */
3569 if (ui_out_is_mi_like_p (uiout
))
3570 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3571 ui_out_field_int (uiout
, "times", b
->hit_count
);
3573 if (b
->ignore_count
)
3576 ui_out_text (uiout
, "\tignore next ");
3577 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3578 ui_out_text (uiout
, " hits\n");
3581 if ((l
= b
->commands
))
3583 struct cleanup
*script_chain
;
3586 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3587 print_command_lines (uiout
, l
, 4);
3588 do_cleanups (script_chain
);
3590 do_cleanups (bkpt_chain
);
3591 do_cleanups (old_chain
);
3594 struct captured_breakpoint_query_args
3600 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3602 struct captured_breakpoint_query_args
*args
= data
;
3603 struct breakpoint
*b
;
3604 CORE_ADDR dummy_addr
= 0;
3607 if (args
->bnum
== b
->number
)
3609 print_one_breakpoint (b
, &dummy_addr
);
3617 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
)
3619 struct captured_breakpoint_query_args args
;
3621 /* For the moment we don't trust print_one_breakpoint() to not throw
3623 return catch_exceptions (uiout
, do_captured_breakpoint_query
, &args
,
3624 NULL
, RETURN_MASK_ALL
);
3627 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3628 catchpoints, et.al.). */
3631 user_settable_breakpoint (const struct breakpoint
*b
)
3633 return (b
->type
== bp_breakpoint
3634 || b
->type
== bp_catch_load
3635 || b
->type
== bp_catch_unload
3636 || b
->type
== bp_catch_fork
3637 || b
->type
== bp_catch_vfork
3638 || b
->type
== bp_catch_exec
3639 || b
->type
== bp_catch_catch
3640 || b
->type
== bp_catch_throw
3641 || b
->type
== bp_hardware_breakpoint
3642 || b
->type
== bp_watchpoint
3643 || b
->type
== bp_read_watchpoint
3644 || b
->type
== bp_access_watchpoint
3645 || b
->type
== bp_hardware_watchpoint
);
3648 /* Print information on user settable breakpoint (watchpoint, etc)
3649 number BNUM. If BNUM is -1 print all user settable breakpoints.
3650 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3653 breakpoint_1 (int bnum
, int allflag
)
3655 struct breakpoint
*b
;
3656 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3657 int nr_printable_breakpoints
;
3658 struct cleanup
*bkpttbl_chain
;
3660 /* Compute the number of rows in the table. */
3661 nr_printable_breakpoints
= 0;
3664 || bnum
== b
->number
)
3666 if (allflag
|| user_settable_breakpoint (b
))
3667 nr_printable_breakpoints
++;
3672 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3676 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3679 if (nr_printable_breakpoints
> 0)
3680 annotate_breakpoints_headers ();
3681 if (nr_printable_breakpoints
> 0)
3683 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3684 if (nr_printable_breakpoints
> 0)
3686 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3687 if (nr_printable_breakpoints
> 0)
3689 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3690 if (nr_printable_breakpoints
> 0)
3692 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3695 if (nr_printable_breakpoints
> 0)
3697 if (TARGET_ADDR_BIT
<= 32)
3698 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3700 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3702 if (nr_printable_breakpoints
> 0)
3704 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3705 ui_out_table_body (uiout
);
3706 if (nr_printable_breakpoints
> 0)
3707 annotate_breakpoints_table ();
3711 || bnum
== b
->number
)
3713 /* We only print out user settable breakpoints unless the
3715 if (allflag
|| user_settable_breakpoint (b
))
3716 print_one_breakpoint (b
, &last_addr
);
3719 do_cleanups (bkpttbl_chain
);
3721 if (nr_printable_breakpoints
== 0)
3724 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3726 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3731 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3732 that a comparison of an unsigned with -1 is always false. */
3733 if (last_addr
!= (CORE_ADDR
) -1)
3734 set_next_address (last_addr
);
3737 /* FIXME? Should this be moved up so that it is only called when
3738 there have been breakpoints? */
3739 annotate_breakpoints_table_end ();
3743 breakpoints_info (char *bnum_exp
, int from_tty
)
3748 bnum
= parse_and_eval_long (bnum_exp
);
3750 breakpoint_1 (bnum
, 0);
3754 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3759 bnum
= parse_and_eval_long (bnum_exp
);
3761 breakpoint_1 (bnum
, 1);
3764 /* Print a message describing any breakpoints set at PC. */
3767 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3770 struct breakpoint
*b
;
3773 if (b
->loc
->address
== pc
) /* address match / overlay match */
3774 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3778 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3780 if (b
->loc
->address
== pc
) /* address match / overlay match */
3781 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3784 printf_filtered ("%d%s%s ",
3786 ((b
->enable_state
== bp_disabled
||
3787 b
->enable_state
== bp_shlib_disabled
||
3788 b
->enable_state
== bp_call_disabled
)
3790 : b
->enable_state
== bp_permanent
3794 : ((others
== 1) ? " and" : ""));
3796 printf_filtered ("also set at pc ");
3797 print_address_numeric (pc
, 1, gdb_stdout
);
3798 printf_filtered (".\n");
3802 /* Set the default place to put a breakpoint
3803 for the `break' command with no arguments. */
3806 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3809 default_breakpoint_valid
= valid
;
3810 default_breakpoint_address
= addr
;
3811 default_breakpoint_symtab
= symtab
;
3812 default_breakpoint_line
= line
;
3815 /* Return true iff it is meaningful to use the address member of
3816 BPT. For some breakpoint types, the address member is irrelevant
3817 and it makes no sense to attempt to compare it to other addresses
3818 (or use it for any other purpose either).
3820 More specifically, each of the following breakpoint types will always
3821 have a zero valued address and we don't want check_duplicates() to mark
3822 breakpoints of any of these types to be a duplicate of an actual
3823 breakpoint at address zero:
3826 bp_hardware_watchpoint
3828 bp_access_watchpoint
3835 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3837 enum bptype type
= bpt
->type
;
3839 return (type
!= bp_watchpoint
3840 && type
!= bp_hardware_watchpoint
3841 && type
!= bp_read_watchpoint
3842 && type
!= bp_access_watchpoint
3843 && type
!= bp_catch_exec
3844 && type
!= bp_longjmp_resume
3845 && type
!= bp_catch_fork
3846 && type
!= bp_catch_vfork
);
3849 /* Rescan breakpoints at the same address and section as BPT,
3850 marking the first one as "first" and any others as "duplicates".
3851 This is so that the bpt instruction is only inserted once.
3852 If we have a permanent breakpoint at the same place as BPT, make
3853 that one the official one, and the rest as duplicates. */
3856 check_duplicates (struct breakpoint
*bpt
)
3858 struct bp_location
*b
;
3860 struct bp_location
*perm_bp
= 0;
3861 CORE_ADDR address
= bpt
->loc
->address
;
3862 asection
*section
= bpt
->loc
->section
;
3864 if (! breakpoint_address_is_meaningful (bpt
))
3867 ALL_BP_LOCATIONS (b
)
3868 if (b
->owner
->enable_state
!= bp_disabled
3869 && b
->owner
->enable_state
!= bp_shlib_disabled
3870 && !b
->owner
->pending
3871 && b
->owner
->enable_state
!= bp_call_disabled
3872 && b
->address
== address
/* address / overlay match */
3873 && (!overlay_debugging
|| b
->section
== section
)
3874 && breakpoint_address_is_meaningful (b
->owner
))
3876 /* Have we found a permanent breakpoint? */
3877 if (b
->owner
->enable_state
== bp_permanent
)
3884 b
->duplicate
= count
> 1;
3887 /* If we found a permanent breakpoint at this address, go over the
3888 list again and declare all the other breakpoints there to be the
3892 perm_bp
->duplicate
= 0;
3894 /* Permanent breakpoint should always be inserted. */
3895 if (! perm_bp
->inserted
)
3896 internal_error (__FILE__
, __LINE__
,
3897 "allegedly permanent breakpoint is not "
3898 "actually inserted");
3900 ALL_BP_LOCATIONS (b
)
3903 if (b
->owner
->enable_state
!= bp_disabled
3904 && b
->owner
->enable_state
!= bp_shlib_disabled
3905 && !b
->owner
->pending
3906 && b
->owner
->enable_state
!= bp_call_disabled
3907 && b
->address
== address
/* address / overlay match */
3908 && (!overlay_debugging
|| b
->section
== section
)
3909 && breakpoint_address_is_meaningful (b
->owner
))
3912 internal_error (__FILE__
, __LINE__
,
3913 "another breakpoint was inserted on top of "
3914 "a permanent breakpoint");
3923 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
3924 int bnum
, int have_bnum
)
3929 strcpy (astr1
, local_hex_string_custom ((unsigned long) from_addr
, "08l"));
3930 strcpy (astr2
, local_hex_string_custom ((unsigned long) to_addr
, "08l"));
3932 warning ("Breakpoint %d address previously adjusted from %s to %s.",
3933 bnum
, astr1
, astr2
);
3935 warning ("Breakpoint address adjusted from %s to %s.", astr1
, astr2
);
3938 /* Adjust a breakpoint's address to account for architectural constraints
3939 on breakpoint placement. Return the adjusted address. Note: Very
3940 few targets require this kind of adjustment. For most targets,
3941 this function is simply the identity function. */
3944 adjust_breakpoint_address (CORE_ADDR bpaddr
)
3946 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
3948 /* Very few targets need any kind of breakpoint adjustment. */
3953 CORE_ADDR adjusted_bpaddr
;
3955 /* Some targets have architectural constraints on the placement
3956 of breakpoint instructions. Obtain the adjusted address. */
3957 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
3960 /* An adjusted breakpoint address can significantly alter
3961 a user's expectations. Print a warning if an adjustment
3963 if (adjusted_bpaddr
!= bpaddr
)
3964 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
3966 return adjusted_bpaddr
;
3970 /* Allocate a struct bp_location. */
3972 static struct bp_location
*
3973 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
3975 struct bp_location
*loc
, *loc_p
;
3977 loc
= xmalloc (sizeof (struct bp_location
));
3978 memset (loc
, 0, sizeof (*loc
));
3988 case bp_longjmp_resume
:
3989 case bp_step_resume
:
3990 case bp_through_sigtramp
:
3991 case bp_watchpoint_scope
:
3993 case bp_shlib_event
:
3994 case bp_thread_event
:
3995 case bp_overlay_event
:
3997 case bp_catch_unload
:
3998 loc
->loc_type
= bp_loc_software_breakpoint
;
4000 case bp_hardware_breakpoint
:
4001 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4003 case bp_hardware_watchpoint
:
4004 case bp_read_watchpoint
:
4005 case bp_access_watchpoint
:
4006 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4010 case bp_catch_vfork
:
4012 case bp_catch_catch
:
4013 case bp_catch_throw
:
4014 loc
->loc_type
= bp_loc_other
;
4017 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
4020 /* Add this breakpoint to the end of the chain. */
4022 loc_p
= bp_location_chain
;
4024 bp_location_chain
= loc
;
4028 loc_p
= loc_p
->next
;
4035 /* set_raw_breakpoint() is a low level routine for allocating and
4036 partially initializing a breakpoint of type BPTYPE. The newly
4037 created breakpoint's address, section, source file name, and line
4038 number are provided by SAL. The newly created and partially
4039 initialized breakpoint is added to the breakpoint chain and
4040 is also returned as the value of this function.
4042 It is expected that the caller will complete the initialization of
4043 the newly created breakpoint struct as well as output any status
4044 information regarding the creation of a new breakpoint. In
4045 particular, set_raw_breakpoint() does NOT set the breakpoint
4046 number! Care should be taken to not allow an error() to occur
4047 prior to completing the initialization of the breakpoint. If this
4048 should happen, a bogus breakpoint will be left on the chain. */
4051 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4053 struct breakpoint
*b
, *b1
;
4055 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4056 memset (b
, 0, sizeof (*b
));
4057 b
->loc
= allocate_bp_location (b
, bptype
);
4058 b
->loc
->requested_address
= sal
.pc
;
4059 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
);
4060 if (sal
.symtab
== NULL
)
4061 b
->source_file
= NULL
;
4063 b
->source_file
= savestring (sal
.symtab
->filename
,
4064 strlen (sal
.symtab
->filename
));
4065 b
->loc
->section
= sal
.section
;
4067 b
->language
= current_language
->la_language
;
4068 b
->input_radix
= input_radix
;
4070 b
->line_number
= sal
.line
;
4071 b
->enable_state
= bp_enabled
;
4074 b
->ignore_count
= 0;
4076 b
->frame_id
= null_frame_id
;
4077 b
->dll_pathname
= NULL
;
4078 b
->triggered_dll_pathname
= NULL
;
4079 b
->forked_inferior_pid
= 0;
4080 b
->exec_pathname
= NULL
;
4084 /* Add this breakpoint to the end of the chain
4085 so that a list of breakpoints will come out in order
4086 of increasing numbers. */
4088 b1
= breakpoint_chain
;
4090 breakpoint_chain
= b
;
4098 check_duplicates (b
);
4099 breakpoints_changed ();
4105 /* Note that the breakpoint object B describes a permanent breakpoint
4106 instruction, hard-wired into the inferior's code. */
4108 make_breakpoint_permanent (struct breakpoint
*b
)
4110 b
->enable_state
= bp_permanent
;
4112 /* By definition, permanent breakpoints are already present in the code. */
4113 b
->loc
->inserted
= 1;
4116 static struct breakpoint
*
4117 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4119 static int internal_breakpoint_number
= -1;
4120 struct symtab_and_line sal
;
4121 struct breakpoint
*b
;
4123 init_sal (&sal
); /* initialize to zeroes */
4126 sal
.section
= find_pc_overlay (sal
.pc
);
4128 b
= set_raw_breakpoint (sal
, type
);
4129 b
->number
= internal_breakpoint_number
--;
4130 b
->disposition
= disp_donttouch
;
4137 create_longjmp_breakpoint (char *func_name
)
4139 struct breakpoint
*b
;
4140 struct minimal_symbol
*m
;
4142 if (func_name
== NULL
)
4143 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
4146 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4149 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4152 b
->enable_state
= bp_disabled
;
4155 b
->addr_string
= xstrdup (func_name
);
4158 /* Call this routine when stepping and nexting to enable a breakpoint
4159 if we do a longjmp(). When we hit that breakpoint, call
4160 set_longjmp_resume_breakpoint() to figure out where we are going. */
4163 enable_longjmp_breakpoint (void)
4165 struct breakpoint
*b
;
4168 if (b
->type
== bp_longjmp
)
4170 b
->enable_state
= bp_enabled
;
4171 check_duplicates (b
);
4176 disable_longjmp_breakpoint (void)
4178 struct breakpoint
*b
;
4181 if (b
->type
== bp_longjmp
4182 || b
->type
== bp_longjmp_resume
)
4184 b
->enable_state
= bp_disabled
;
4185 check_duplicates (b
);
4190 create_overlay_event_breakpoint (char *func_name
)
4192 struct breakpoint
*b
;
4193 struct minimal_symbol
*m
;
4195 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4198 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4200 b
->addr_string
= xstrdup (func_name
);
4202 if (overlay_debugging
== ovly_auto
)
4204 b
->enable_state
= bp_enabled
;
4205 overlay_events_enabled
= 1;
4209 b
->enable_state
= bp_disabled
;
4210 overlay_events_enabled
= 0;
4215 enable_overlay_breakpoints (void)
4217 struct breakpoint
*b
;
4220 if (b
->type
== bp_overlay_event
)
4222 b
->enable_state
= bp_enabled
;
4223 check_duplicates (b
);
4224 overlay_events_enabled
= 1;
4229 disable_overlay_breakpoints (void)
4231 struct breakpoint
*b
;
4234 if (b
->type
== bp_overlay_event
)
4236 b
->enable_state
= bp_disabled
;
4237 check_duplicates (b
);
4238 overlay_events_enabled
= 0;
4243 create_thread_event_breakpoint (CORE_ADDR address
)
4245 struct breakpoint
*b
;
4247 b
= create_internal_breakpoint (address
, bp_thread_event
);
4249 b
->enable_state
= bp_enabled
;
4250 /* addr_string has to be used or breakpoint_re_set will delete me. */
4251 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->loc
->address
));
4257 remove_thread_event_breakpoints (void)
4259 struct breakpoint
*b
, *temp
;
4261 ALL_BREAKPOINTS_SAFE (b
, temp
)
4262 if (b
->type
== bp_thread_event
)
4263 delete_breakpoint (b
);
4266 struct captured_parse_breakpoint_args
4269 struct symtabs_and_lines
*sals_p
;
4270 char ***addr_string_p
;
4274 struct lang_and_radix
4280 /* Cleanup helper routine to restore the current language and
4283 do_restore_lang_radix_cleanup (void *old
)
4285 struct lang_and_radix
*p
= old
;
4286 set_language (p
->lang
);
4287 input_radix
= p
->radix
;
4290 /* Try and resolve a pending breakpoint. */
4292 resolve_pending_breakpoint (struct breakpoint
*b
)
4294 /* Try and reparse the breakpoint in case the shared library
4296 struct symtabs_and_lines sals
;
4297 struct symtab_and_line pending_sal
;
4298 char **cond_string
= (char **) NULL
;
4299 char *copy_arg
= b
->addr_string
;
4304 struct ui_file
*old_gdb_stderr
;
4305 struct lang_and_radix old_lr
;
4306 struct cleanup
*old_chain
;
4308 /* Set language, input-radix, then reissue breakpoint command.
4309 Ensure the language and input-radix are restored afterwards. */
4310 old_lr
.lang
= current_language
->la_language
;
4311 old_lr
.radix
= input_radix
;
4312 old_chain
= make_cleanup (do_restore_lang_radix_cleanup
, &old_lr
);
4314 set_language (b
->language
);
4315 input_radix
= b
->input_radix
;
4316 rc
= break_command_1 (b
->addr_string
, b
->flag
, b
->from_tty
, b
);
4318 if (rc
== GDB_RC_OK
)
4319 /* Pending breakpoint has been resolved. */
4320 printf_filtered ("Pending breakpoint \"%s\" resolved\n", b
->addr_string
);
4322 do_cleanups (old_chain
);
4328 remove_solib_event_breakpoints (void)
4330 struct breakpoint
*b
, *temp
;
4332 ALL_BREAKPOINTS_SAFE (b
, temp
)
4333 if (b
->type
== bp_shlib_event
)
4334 delete_breakpoint (b
);
4338 create_solib_event_breakpoint (CORE_ADDR address
)
4340 struct breakpoint
*b
;
4342 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4346 /* Disable any breakpoints that are on code in shared libraries. Only
4347 apply to enabled breakpoints, disabled ones can just stay disabled. */
4350 disable_breakpoints_in_shlibs (int silent
)
4352 struct breakpoint
*b
;
4353 int disabled_shlib_breaks
= 0;
4355 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4358 #if defined (PC_SOLIB)
4359 if (((b
->type
== bp_breakpoint
) ||
4360 (b
->type
== bp_hardware_breakpoint
)) &&
4361 breakpoint_enabled (b
) &&
4362 !b
->loc
->duplicate
&&
4363 PC_SOLIB (b
->loc
->address
))
4365 b
->enable_state
= bp_shlib_disabled
;
4368 if (!disabled_shlib_breaks
)
4370 target_terminal_ours_for_output ();
4371 warning ("Temporarily disabling shared library breakpoints:");
4373 disabled_shlib_breaks
= 1;
4374 warning ("breakpoint #%d ", b
->number
);
4381 /* Try to reenable any breakpoints in shared libraries. */
4383 re_enable_breakpoints_in_shlibs (void)
4385 struct breakpoint
*b
, *tmp
;
4387 ALL_BREAKPOINTS_SAFE (b
, tmp
)
4389 if (b
->enable_state
== bp_shlib_disabled
)
4393 /* Do not reenable the breakpoint if the shared library
4394 is still not mapped in. */
4395 lib
= PC_SOLIB (b
->loc
->address
);
4396 if (lib
!= NULL
&& target_read_memory (b
->loc
->address
, buf
, 1) == 0)
4397 b
->enable_state
= bp_enabled
;
4399 else if (b
->pending
&& (b
->enable_state
== bp_enabled
))
4401 if (resolve_pending_breakpoint (b
) == GDB_RC_OK
)
4402 delete_breakpoint (b
);
4410 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4411 char *cond_string
, enum bptype bp_kind
)
4413 struct breakpoint
*b
;
4414 struct symtabs_and_lines sals
;
4415 struct cleanup
*old_chain
;
4416 struct cleanup
*canonical_strings_chain
= NULL
;
4417 char *addr_start
= hookname
;
4418 char *addr_end
= NULL
;
4419 char **canonical
= (char **) NULL
;
4420 int thread
= -1; /* All threads. */
4422 /* Set a breakpoint on the specified hook. */
4423 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
, 0, &canonical
, NULL
);
4424 addr_end
= hookname
;
4426 if (sals
.nelts
== 0)
4428 warning ("Unable to set a breakpoint on dynamic linker callback.");
4429 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4430 warning ("GDB will be unable to track shl_load/shl_unload calls");
4433 if (sals
.nelts
!= 1)
4435 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4436 warning ("GDB will be unable to track shl_load/shl_unload calls");
4440 /* Make sure that all storage allocated in decode_line_1 gets freed
4441 in case the following errors out. */
4442 old_chain
= make_cleanup (xfree
, sals
.sals
);
4443 if (canonical
!= (char **) NULL
)
4445 make_cleanup (xfree
, canonical
);
4446 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4447 if (canonical
[0] != NULL
)
4448 make_cleanup (xfree
, canonical
[0]);
4451 resolve_sal_pc (&sals
.sals
[0]);
4453 /* Remove the canonical strings from the cleanup, they are needed below. */
4454 if (canonical
!= (char **) NULL
)
4455 discard_cleanups (canonical_strings_chain
);
4457 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4458 set_breakpoint_count (breakpoint_count
+ 1);
4459 b
->number
= breakpoint_count
;
4461 b
->cond_string
= (cond_string
== NULL
) ?
4462 NULL
: savestring (cond_string
, strlen (cond_string
));
4465 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4466 b
->addr_string
= canonical
[0];
4467 else if (addr_start
)
4468 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4470 b
->enable_state
= bp_enabled
;
4471 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4473 if (dll_pathname
== NULL
)
4474 b
->dll_pathname
= NULL
;
4477 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4478 strcpy (b
->dll_pathname
, dll_pathname
);
4482 do_cleanups (old_chain
);
4486 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4487 char *dll_pathname
, char *cond_string
)
4489 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4490 cond_string
, bp_catch_load
);
4494 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4495 char *dll_pathname
, char *cond_string
)
4497 solib_load_unload_1 (hookname
,tempflag
, dll_pathname
,
4498 cond_string
, bp_catch_unload
);
4502 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4503 enum bptype bp_kind
)
4505 struct symtab_and_line sal
;
4506 struct breakpoint
*b
;
4507 int thread
= -1; /* All threads. */
4514 b
= set_raw_breakpoint (sal
, bp_kind
);
4515 set_breakpoint_count (breakpoint_count
+ 1);
4516 b
->number
= breakpoint_count
;
4518 b
->cond_string
= (cond_string
== NULL
) ?
4519 NULL
: savestring (cond_string
, strlen (cond_string
));
4521 b
->addr_string
= NULL
;
4522 b
->enable_state
= bp_enabled
;
4523 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4524 b
->forked_inferior_pid
= 0;
4530 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4532 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4536 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4538 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4542 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4544 struct symtab_and_line sal
;
4545 struct breakpoint
*b
;
4546 int thread
= -1; /* All threads. */
4553 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4554 set_breakpoint_count (breakpoint_count
+ 1);
4555 b
->number
= breakpoint_count
;
4557 b
->cond_string
= (cond_string
== NULL
) ?
4558 NULL
: savestring (cond_string
, strlen (cond_string
));
4560 b
->addr_string
= NULL
;
4561 b
->enable_state
= bp_enabled
;
4562 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4568 hw_breakpoint_used_count (void)
4570 struct breakpoint
*b
;
4575 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4583 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4585 struct breakpoint
*b
;
4588 *other_type_used
= 0;
4591 if (breakpoint_enabled (b
))
4593 if (b
->type
== type
)
4595 else if ((b
->type
== bp_hardware_watchpoint
||
4596 b
->type
== bp_read_watchpoint
||
4597 b
->type
== bp_access_watchpoint
))
4598 *other_type_used
= 1;
4604 /* Call this after hitting the longjmp() breakpoint. Use this to set
4605 a new breakpoint at the target of the jmp_buf.
4607 FIXME - This ought to be done by setting a temporary breakpoint
4608 that gets deleted automatically... */
4611 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4613 struct breakpoint
*b
;
4616 if (b
->type
== bp_longjmp_resume
)
4618 b
->loc
->requested_address
= pc
;
4619 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
);
4620 b
->enable_state
= bp_enabled
;
4621 b
->frame_id
= frame_id
;
4622 check_duplicates (b
);
4628 disable_watchpoints_before_interactive_call_start (void)
4630 struct breakpoint
*b
;
4634 if (((b
->type
== bp_watchpoint
)
4635 || (b
->type
== bp_hardware_watchpoint
)
4636 || (b
->type
== bp_read_watchpoint
)
4637 || (b
->type
== bp_access_watchpoint
)
4638 || ep_is_exception_catchpoint (b
))
4639 && breakpoint_enabled (b
))
4641 b
->enable_state
= bp_call_disabled
;
4642 check_duplicates (b
);
4648 enable_watchpoints_after_interactive_call_stop (void)
4650 struct breakpoint
*b
;
4654 if (((b
->type
== bp_watchpoint
)
4655 || (b
->type
== bp_hardware_watchpoint
)
4656 || (b
->type
== bp_read_watchpoint
)
4657 || (b
->type
== bp_access_watchpoint
)
4658 || ep_is_exception_catchpoint (b
))
4659 && (b
->enable_state
== bp_call_disabled
))
4661 b
->enable_state
= bp_enabled
;
4662 check_duplicates (b
);
4668 /* Set a breakpoint that will evaporate an end of command
4669 at address specified by SAL.
4670 Restrict it to frame FRAME if FRAME is nonzero. */
4673 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4676 struct breakpoint
*b
;
4677 b
= set_raw_breakpoint (sal
, type
);
4678 b
->enable_state
= bp_enabled
;
4679 b
->disposition
= disp_donttouch
;
4680 b
->frame_id
= frame_id
;
4682 /* If we're debugging a multi-threaded program, then we
4683 want momentary breakpoints to be active in only a
4684 single thread of control. */
4685 if (in_thread_list (inferior_ptid
))
4686 b
->thread
= pid_to_thread_id (inferior_ptid
);
4692 /* Tell the user we have just set a breakpoint B. */
4695 mention (struct breakpoint
*b
)
4698 struct cleanup
*old_chain
, *ui_out_chain
;
4699 struct ui_stream
*stb
;
4701 stb
= ui_out_stream_new (uiout
);
4702 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4704 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4705 watchpoint) other than breakpoint creation. It should be possible to
4706 clean this up and at the same time replace the random calls to
4707 breakpoint_changed with this hook, as has already been done for
4708 delete_breakpoint_hook and so on. */
4709 if (create_breakpoint_hook
)
4710 create_breakpoint_hook (b
);
4711 breakpoint_create_event (b
->number
);
4713 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4714 b
->ops
->print_mention (b
);
4719 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4722 ui_out_text (uiout
, "Watchpoint ");
4723 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4724 ui_out_field_int (uiout
, "number", b
->number
);
4725 ui_out_text (uiout
, ": ");
4726 print_expression (b
->exp
, stb
->stream
);
4727 ui_out_field_stream (uiout
, "exp", stb
);
4728 do_cleanups (ui_out_chain
);
4730 case bp_hardware_watchpoint
:
4731 ui_out_text (uiout
, "Hardware watchpoint ");
4732 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4733 ui_out_field_int (uiout
, "number", b
->number
);
4734 ui_out_text (uiout
, ": ");
4735 print_expression (b
->exp
, stb
->stream
);
4736 ui_out_field_stream (uiout
, "exp", stb
);
4737 do_cleanups (ui_out_chain
);
4739 case bp_read_watchpoint
:
4740 ui_out_text (uiout
, "Hardware read watchpoint ");
4741 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4742 ui_out_field_int (uiout
, "number", b
->number
);
4743 ui_out_text (uiout
, ": ");
4744 print_expression (b
->exp
, stb
->stream
);
4745 ui_out_field_stream (uiout
, "exp", stb
);
4746 do_cleanups (ui_out_chain
);
4748 case bp_access_watchpoint
:
4749 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4750 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4751 ui_out_field_int (uiout
, "number", b
->number
);
4752 ui_out_text (uiout
, ": ");
4753 print_expression (b
->exp
, stb
->stream
);
4754 ui_out_field_stream (uiout
, "exp", stb
);
4755 do_cleanups (ui_out_chain
);
4758 if (ui_out_is_mi_like_p (uiout
))
4763 printf_filtered ("Breakpoint %d", b
->number
);
4766 case bp_hardware_breakpoint
:
4767 if (ui_out_is_mi_like_p (uiout
))
4772 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4776 case bp_catch_unload
:
4777 printf_filtered ("Catchpoint %d (%s %s)",
4779 (b
->type
== bp_catch_load
) ? "load" : "unload",
4780 (b
->dll_pathname
!= NULL
) ?
4781 b
->dll_pathname
: "<any library>");
4784 case bp_catch_vfork
:
4785 printf_filtered ("Catchpoint %d (%s)",
4787 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4790 printf_filtered ("Catchpoint %d (exec)",
4793 case bp_catch_catch
:
4794 case bp_catch_throw
:
4795 printf_filtered ("Catchpoint %d (%s)",
4797 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4803 case bp_longjmp_resume
:
4804 case bp_step_resume
:
4805 case bp_through_sigtramp
:
4807 case bp_watchpoint_scope
:
4808 case bp_shlib_event
:
4809 case bp_thread_event
:
4810 case bp_overlay_event
:
4818 printf_filtered (" (%s) pending.", b
->addr_string
);
4822 if (addressprint
|| b
->source_file
== NULL
)
4824 printf_filtered (" at ");
4825 print_address_numeric (b
->loc
->address
, 1, gdb_stdout
);
4828 printf_filtered (": file %s, line %d.",
4829 b
->source_file
, b
->line_number
);
4832 do_cleanups (old_chain
);
4833 if (ui_out_is_mi_like_p (uiout
))
4835 printf_filtered ("\n");
4839 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4840 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4841 COND[i] and COND_STRING[i] values.
4843 The parameter PENDING_BP points to a pending breakpoint that is
4844 the basis of the breakpoints currently being created. The pending
4845 breakpoint may contain a separate condition string or commands
4846 that were added after the initial pending breakpoint was created.
4848 NOTE: If the function succeeds, the caller is expected to cleanup
4849 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4850 array contents). If the function fails (error() is called), the
4851 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4852 COND and SALS arrays and each of those arrays contents. */
4855 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4856 struct expression
**cond
, char **cond_string
,
4857 enum bptype type
, enum bpdisp disposition
,
4858 int thread
, int ignore_count
, int from_tty
,
4859 struct breakpoint
*pending_bp
)
4861 if (type
== bp_hardware_breakpoint
)
4863 int i
= hw_breakpoint_used_count ();
4864 int target_resources_ok
=
4865 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4867 if (target_resources_ok
== 0)
4868 error ("No hardware breakpoint support in the target.");
4869 else if (target_resources_ok
< 0)
4870 error ("Hardware breakpoints used exceeds limit.");
4873 /* Now set all the breakpoints. */
4876 for (i
= 0; i
< sals
.nelts
; i
++)
4878 struct breakpoint
*b
;
4879 struct symtab_and_line sal
= sals
.sals
[i
];
4882 describe_other_breakpoints (sal
.pc
, sal
.section
);
4884 b
= set_raw_breakpoint (sal
, type
);
4885 set_breakpoint_count (breakpoint_count
+ 1);
4886 b
->number
= breakpoint_count
;
4890 b
->addr_string
= addr_string
[i
];
4892 /* addr_string has to be used or breakpoint_re_set will delete
4894 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->loc
->address
));
4895 b
->cond_string
= cond_string
[i
];
4896 b
->ignore_count
= ignore_count
;
4897 b
->enable_state
= bp_enabled
;
4898 b
->disposition
= disposition
;
4899 /* If resolving a pending breakpoint, a check must be made to see if
4900 the user has specified a new condition or commands for the
4901 breakpoint. A new condition will override any condition that was
4902 initially specified with the initial breakpoint command. */
4906 if (pending_bp
->cond_string
)
4908 arg
= pending_bp
->cond_string
;
4909 b
->cond_string
= savestring (arg
, strlen (arg
));
4910 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
4912 error ("Junk at end of pending breakpoint condition expression");
4914 /* If there are commands associated with the breakpoint, they should
4916 if (pending_bp
->commands
)
4917 b
->commands
= copy_command_lines (pending_bp
->commands
);
4924 /* Parse ARG which is assumed to be a SAL specification possibly
4925 followed by conditionals. On return, SALS contains an array of SAL
4926 addresses found. ADDR_STRING contains a vector of (canonical)
4927 address strings. ARG points to the end of the SAL. */
4930 parse_breakpoint_sals (char **address
,
4931 struct symtabs_and_lines
*sals
,
4932 char ***addr_string
,
4935 char *addr_start
= *address
;
4936 *addr_string
= NULL
;
4937 /* If no arg given, or if first arg is 'if ', use the default
4939 if ((*address
) == NULL
4940 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4942 if (default_breakpoint_valid
)
4944 struct symtab_and_line sal
;
4945 init_sal (&sal
); /* initialize to zeroes */
4946 sals
->sals
= (struct symtab_and_line
*)
4947 xmalloc (sizeof (struct symtab_and_line
));
4948 sal
.pc
= default_breakpoint_address
;
4949 sal
.line
= default_breakpoint_line
;
4950 sal
.symtab
= default_breakpoint_symtab
;
4951 sal
.section
= find_pc_overlay (sal
.pc
);
4952 sals
->sals
[0] = sal
;
4956 error ("No default breakpoint address now.");
4960 /* Force almost all breakpoints to be in terms of the
4961 current_source_symtab (which is decode_line_1's default). This
4962 should produce the results we want almost all of the time while
4963 leaving default_breakpoint_* alone.
4964 ObjC: However, don't match an Objective-C method name which
4965 may have a '+' or '-' succeeded by a '[' */
4967 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
4969 if (default_breakpoint_valid
4971 || ((strchr ("+-", (*address
)[0]) != NULL
)
4972 && ((*address
)[1] != '['))))
4973 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
4974 default_breakpoint_line
, addr_string
,
4977 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
4978 addr_string
, not_found_ptr
);
4980 /* For any SAL that didn't have a canonical string, fill one in. */
4981 if (sals
->nelts
> 0 && *addr_string
== NULL
)
4982 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
4983 if (addr_start
!= (*address
))
4986 for (i
= 0; i
< sals
->nelts
; i
++)
4988 /* Add the string if not present. */
4989 if ((*addr_string
)[i
] == NULL
)
4990 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
4996 /* Convert each SAL into a real PC. Verify that the PC can be
4997 inserted as a breakpoint. If it can't throw an error. */
5000 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5004 for (i
= 0; i
< sals
->nelts
; i
++)
5006 resolve_sal_pc (&sals
->sals
[i
]);
5008 /* It's possible for the PC to be nonzero, but still an illegal
5009 value on some targets.
5011 For example, on HP-UX if you start gdb, and before running the
5012 inferior you try to set a breakpoint on a shared library function
5013 "foo" where the inferior doesn't call "foo" directly but does
5014 pass its address to another function call, then we do find a
5015 minimal symbol for the "foo", but it's address is invalid.
5016 (Appears to be an index into a table that the loader sets up
5017 when the inferior is run.)
5019 Give the target a chance to bless sals.sals[i].pc before we
5020 try to make a breakpoint for it. */
5021 if (PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
5023 if (address
== NULL
)
5024 error ("Cannot break without a running program.");
5026 error ("Cannot break on %s without a running program.",
5033 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5035 struct captured_parse_breakpoint_args
*args
= data
;
5037 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5038 args
->not_found_ptr
);
5043 /* Set a breakpoint according to ARG (function, linenum or *address)
5044 flag: first bit : 0 non-temporary, 1 temporary.
5045 second bit : 0 normal breakpoint, 1 hardware breakpoint.
5047 PENDING_BP is non-NULL when this function is being called to resolve
5048 a pending breakpoint. */
5051 break_command_1 (char *arg
, int flag
, int from_tty
, struct breakpoint
*pending_bp
)
5053 int tempflag
, hardwareflag
;
5054 struct symtabs_and_lines sals
;
5055 struct expression
**cond
= 0;
5056 struct symtab_and_line pending_sal
;
5057 char **cond_string
= (char **) NULL
;
5060 char *addr_start
= arg
;
5062 struct cleanup
*old_chain
;
5063 struct cleanup
*breakpoint_chain
= NULL
;
5064 struct captured_parse_breakpoint_args parse_args
;
5068 int ignore_count
= 0;
5071 hardwareflag
= flag
& BP_HARDWAREFLAG
;
5072 tempflag
= flag
& BP_TEMPFLAG
;
5078 parse_args
.arg_p
= &arg
;
5079 parse_args
.sals_p
= &sals
;
5080 parse_args
.addr_string_p
= &addr_string
;
5081 parse_args
.not_found_ptr
= ¬_found
;
5083 rc
= catch_exceptions_with_msg (uiout
, do_captured_parse_breakpoint
,
5084 &parse_args
, NULL
, &err_msg
,
5087 /* If caller is interested in rc value from parse, set value. */
5089 if (rc
!= GDB_RC_OK
)
5091 /* Check for file or function not found. */
5094 /* If called to resolve pending breakpoint, just return error code. */
5098 error_output_message (NULL
, err_msg
);
5100 if (!nquery ("Make breakpoint pending on future shared library load? "))
5102 copy_arg
= xstrdup (addr_start
);
5103 addr_string
= ©_arg
;
5105 sals
.sals
= &pending_sal
;
5112 else if (!sals
.nelts
)
5115 /* Create a chain of things that always need to be cleaned up. */
5116 old_chain
= make_cleanup (null_cleanup
, 0);
5120 /* Make sure that all storage allocated to SALS gets freed. */
5121 make_cleanup (xfree
, sals
.sals
);
5123 /* Cleanup the addr_string array but not its contents. */
5124 make_cleanup (xfree
, addr_string
);
5127 /* Allocate space for all the cond expressions. */
5128 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5129 make_cleanup (xfree
, cond
);
5131 /* Allocate space for all the cond strings. */
5132 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5133 make_cleanup (xfree
, cond_string
);
5135 /* ----------------------------- SNIP -----------------------------
5136 Anything added to the cleanup chain beyond this point is assumed
5137 to be part of a breakpoint. If the breakpoint create succeeds
5138 then the memory is not reclaimed. */
5139 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5141 /* Mark the contents of the addr_string for cleanup. These go on
5142 the breakpoint_chain and only occure if the breakpoint create
5144 for (i
= 0; i
< sals
.nelts
; i
++)
5146 if (addr_string
[i
] != NULL
)
5147 make_cleanup (xfree
, addr_string
[i
]);
5150 /* Resolve all line numbers to PC's and verify that the addresses
5151 are ok for the target. */
5153 breakpoint_sals_to_pc (&sals
, addr_start
);
5155 /* Verify that condition can be parsed, before setting any
5156 breakpoints. Allocate a separate condition expression for each
5158 thread
= -1; /* No specific thread yet */
5161 for (i
= 0; i
< sals
.nelts
; i
++)
5168 char *cond_start
= NULL
;
5169 char *cond_end
= NULL
;
5170 while (*tok
== ' ' || *tok
== '\t')
5175 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5178 toklen
= end_tok
- tok
;
5180 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5182 tok
= cond_start
= end_tok
+ 1;
5183 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
),
5185 make_cleanup (xfree
, cond
[i
]);
5187 cond_string
[i
] = savestring (cond_start
,
5188 cond_end
- cond_start
);
5189 make_cleanup (xfree
, cond_string
[i
]);
5191 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5197 thread
= strtol (tok
, &tok
, 0);
5199 error ("Junk after thread keyword.");
5200 if (!valid_thread_id (thread
))
5201 error ("Unknown thread %d\n", thread
);
5204 error ("Junk at end of arguments.");
5207 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5208 hardwareflag
? bp_hardware_breakpoint
5210 tempflag
? disp_del
: disp_donttouch
,
5211 thread
, ignore_count
, from_tty
,
5216 struct symtab_and_line sal
;
5217 struct breakpoint
*b
;
5222 make_cleanup (xfree
, copy_arg
);
5224 b
= set_raw_breakpoint (sal
, hardwareflag
? bp_hardware_breakpoint
5226 set_breakpoint_count (breakpoint_count
+ 1);
5227 b
->number
= breakpoint_count
;
5230 b
->addr_string
= *addr_string
;
5231 b
->cond_string
= *cond_string
;
5232 b
->ignore_count
= ignore_count
;
5234 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5235 b
->from_tty
= from_tty
;
5242 warning ("Multiple breakpoints were set.");
5243 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5245 /* That's it. Discard the cleanups for data inserted into the
5247 discard_cleanups (breakpoint_chain
);
5248 /* But cleanup everything else. */
5249 do_cleanups (old_chain
);
5254 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
5255 linenum or *address) with COND and IGNORE_COUNT. */
5257 struct captured_breakpoint_args
5268 do_captured_breakpoint (void *data
)
5270 struct captured_breakpoint_args
*args
= data
;
5271 struct symtabs_and_lines sals
;
5272 struct expression
**cond
;
5273 struct cleanup
*old_chain
;
5274 struct cleanup
*breakpoint_chain
= NULL
;
5281 /* Parse the source and lines spec. Delay check that the expression
5282 didn't contain trailing garbage until after cleanups are in
5286 address_end
= args
->address
;
5288 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
, 0);
5293 /* Create a chain of things at always need to be cleaned up. */
5294 old_chain
= make_cleanup (null_cleanup
, 0);
5296 /* Always have a addr_string array, even if it is empty. */
5297 make_cleanup (xfree
, addr_string
);
5299 /* Make sure that all storage allocated to SALS gets freed. */
5300 make_cleanup (xfree
, sals
.sals
);
5302 /* Allocate space for all the cond expressions. */
5303 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5304 make_cleanup (xfree
, cond
);
5306 /* Allocate space for all the cond strings. */
5307 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5308 make_cleanup (xfree
, cond_string
);
5310 /* ----------------------------- SNIP -----------------------------
5311 Anything added to the cleanup chain beyond this point is assumed
5312 to be part of a breakpoint. If the breakpoint create goes
5313 through then that memory is not cleaned up. */
5314 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5316 /* Mark the contents of the addr_string for cleanup. These go on
5317 the breakpoint_chain and only occure if the breakpoint create
5319 for (i
= 0; i
< sals
.nelts
; i
++)
5321 if (addr_string
[i
] != NULL
)
5322 make_cleanup (xfree
, addr_string
[i
]);
5325 /* Wait until now before checking for garbage at the end of the
5326 address. That way cleanups can take care of freeing any
5328 if (*address_end
!= '\0')
5329 error ("Garbage %s following breakpoint address", address_end
);
5331 /* Resolve all line numbers to PC's. */
5332 breakpoint_sals_to_pc (&sals
, args
->address
);
5334 /* Verify that conditions can be parsed, before setting any
5336 for (i
= 0; i
< sals
.nelts
; i
++)
5338 if (args
->condition
!= NULL
)
5340 char *tok
= args
->condition
;
5341 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
5343 error ("Garbage %s follows condition", tok
);
5344 make_cleanup (xfree
, cond
[i
]);
5345 cond_string
[i
] = xstrdup (args
->condition
);
5349 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5350 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5351 args
->tempflag
? disp_del
: disp_donttouch
,
5352 args
->thread
, args
->ignore_count
, 0/*from-tty*/,
5353 NULL
/*pending_bp*/);
5355 /* That's it. Discard the cleanups for data inserted into the
5357 discard_cleanups (breakpoint_chain
);
5358 /* But cleanup everything else. */
5359 do_cleanups (old_chain
);
5364 gdb_breakpoint (char *address
, char *condition
,
5365 int hardwareflag
, int tempflag
,
5366 int thread
, int ignore_count
)
5368 struct captured_breakpoint_args args
;
5369 args
.address
= address
;
5370 args
.condition
= condition
;
5371 args
.hardwareflag
= hardwareflag
;
5372 args
.tempflag
= tempflag
;
5373 args
.thread
= thread
;
5374 args
.ignore_count
= ignore_count
;
5375 return catch_errors (do_captured_breakpoint
, &args
,
5376 NULL
, RETURN_MASK_ALL
);
5381 break_at_finish_at_depth_command_1 (char *arg
, int flag
, int from_tty
)
5383 struct frame_info
*frame
;
5384 CORE_ADDR low
, high
, selected_pc
= 0;
5385 char *extra_args
= NULL
;
5387 int extra_args_len
= 0, if_arg
= 0;
5390 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5393 if (default_breakpoint_valid
)
5395 if (deprecated_selected_frame
)
5397 selected_pc
= get_frame_pc (deprecated_selected_frame
);
5402 error ("No selected frame.");
5405 error ("No default breakpoint address now.");
5409 extra_args
= strchr (arg
, ' ');
5413 extra_args_len
= strlen (extra_args
);
5414 level_arg
= (char *) xmalloc (extra_args
- arg
);
5415 strncpy (level_arg
, arg
, extra_args
- arg
- 1);
5416 level_arg
[extra_args
- arg
- 1] = '\0';
5420 level_arg
= (char *) xmalloc (strlen (arg
) + 1);
5421 strcpy (level_arg
, arg
);
5424 frame
= parse_frame_specification (level_arg
);
5426 selected_pc
= get_frame_pc (frame
);
5433 extra_args_len
= strlen (arg
);
5438 if (find_pc_partial_function (selected_pc
, (char **) NULL
, &low
, &high
))
5442 addr_string
= xstrprintf ("*0x%s %s", paddr_nz (high
), extra_args
);
5444 addr_string
= xstrprintf ("*0x%s", paddr_nz (high
));
5445 break_command_1 (addr_string
, flag
, from_tty
, NULL
);
5446 xfree (addr_string
);
5449 error ("No function contains the specified address");
5452 error ("Unable to set breakpoint at procedure exit");
5457 break_at_finish_command_1 (char *arg
, int flag
, int from_tty
)
5459 char *addr_string
, *break_string
, *beg_addr_string
;
5460 CORE_ADDR low
, high
;
5461 struct symtabs_and_lines sals
;
5462 struct symtab_and_line sal
;
5463 struct cleanup
*old_chain
;
5464 char *extra_args
= NULL
;
5465 int extra_args_len
= 0;
5469 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5471 if (default_breakpoint_valid
)
5473 if (deprecated_selected_frame
)
5475 addr_string
= xstrprintf ("*0x%s",
5476 paddr_nz (get_frame_pc (deprecated_selected_frame
)));
5481 error ("No selected frame.");
5484 error ("No default breakpoint address now.");
5488 addr_string
= (char *) xmalloc (strlen (arg
) + 1);
5489 strcpy (addr_string
, arg
);
5495 extra_args_len
= strlen (arg
);
5499 /* get the stuff after the function name or address */
5500 extra_args
= strchr (arg
, ' ');
5504 extra_args_len
= strlen (extra_args
);
5511 beg_addr_string
= addr_string
;
5512 sals
= decode_line_1 (&addr_string
, 1, (struct symtab
*) NULL
, 0,
5513 (char ***) NULL
, NULL
);
5515 xfree (beg_addr_string
);
5516 old_chain
= make_cleanup (xfree
, sals
.sals
);
5517 for (i
= 0; (i
< sals
.nelts
); i
++)
5520 if (find_pc_partial_function (sal
.pc
, (char **) NULL
, &low
, &high
))
5524 break_string
= xstrprintf ("*0x%s %s", paddr_nz (high
),
5527 break_string
= xstrprintf ("*0x%s", paddr_nz (high
));
5528 break_command_1 (break_string
, flag
, from_tty
, NULL
);
5529 xfree (break_string
);
5532 error ("No function contains the specified address");
5536 warning ("Multiple breakpoints were set.\n");
5537 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5539 do_cleanups (old_chain
);
5543 /* Helper function for break_command_1 and disassemble_command. */
5546 resolve_sal_pc (struct symtab_and_line
*sal
)
5550 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5552 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5553 error ("No line %d in file \"%s\".",
5554 sal
->line
, sal
->symtab
->filename
);
5558 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5560 struct blockvector
*bv
;
5565 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5568 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5569 sym
= block_function (b
);
5572 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5573 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5577 /* It really is worthwhile to have the section, so we'll just
5578 have to look harder. This case can be executed if we have
5579 line numbers but no functions (as can happen in assembly
5582 struct minimal_symbol
*msym
;
5584 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5586 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5593 break_command (char *arg
, int from_tty
)
5595 break_command_1 (arg
, 0, from_tty
, NULL
);
5599 break_at_finish_command (char *arg
, int from_tty
)
5601 break_at_finish_command_1 (arg
, 0, from_tty
);
5605 break_at_finish_at_depth_command (char *arg
, int from_tty
)
5607 break_at_finish_at_depth_command_1 (arg
, 0, from_tty
);
5611 tbreak_command (char *arg
, int from_tty
)
5613 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
, NULL
);
5617 tbreak_at_finish_command (char *arg
, int from_tty
)
5619 break_at_finish_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5623 hbreak_command (char *arg
, int from_tty
)
5625 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
, NULL
);
5629 thbreak_command (char *arg
, int from_tty
)
5631 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
, NULL
);
5635 stop_command (char *arg
, int from_tty
)
5637 printf_filtered ("Specify the type of breakpoint to set.\n\
5638 Usage: stop in <function | address>\n\
5643 stopin_command (char *arg
, int from_tty
)
5647 if (arg
== (char *) NULL
)
5649 else if (*arg
!= '*')
5654 /* look for a ':'. If this is a line number specification, then
5655 say it is bad, otherwise, it should be an address or
5656 function/method name */
5657 while (*argptr
&& !hasColon
)
5659 hasColon
= (*argptr
== ':');
5664 badInput
= (*argptr
!= ':'); /* Not a class::method */
5666 badInput
= isdigit (*arg
); /* a simple line number */
5670 printf_filtered ("Usage: stop in <function | address>\n");
5672 break_command_1 (arg
, 0, from_tty
, NULL
);
5676 stopat_command (char *arg
, int from_tty
)
5680 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5687 /* look for a ':'. If there is a '::' then get out, otherwise
5688 it is probably a line number. */
5689 while (*argptr
&& !hasColon
)
5691 hasColon
= (*argptr
== ':');
5696 badInput
= (*argptr
== ':'); /* we have class::method */
5698 badInput
= !isdigit (*arg
); /* not a line number */
5702 printf_filtered ("Usage: stop at <line>\n");
5704 break_command_1 (arg
, 0, from_tty
, NULL
);
5707 /* accessflag: hw_write: watch write,
5708 hw_read: watch read,
5709 hw_access: watch access (read or write) */
5711 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5713 struct breakpoint
*b
;
5714 struct symtab_and_line sal
;
5715 struct expression
*exp
;
5716 struct block
*exp_valid_block
;
5717 struct value
*val
, *mark
;
5718 struct frame_info
*frame
;
5719 struct frame_info
*prev_frame
= NULL
;
5720 char *exp_start
= NULL
;
5721 char *exp_end
= NULL
;
5722 char *tok
, *end_tok
;
5724 char *cond_start
= NULL
;
5725 char *cond_end
= NULL
;
5726 struct expression
*cond
= NULL
;
5727 int i
, other_type_used
, target_resources_ok
= 0;
5728 enum bptype bp_type
;
5731 init_sal (&sal
); /* initialize to zeroes */
5733 /* Parse arguments. */
5734 innermost_block
= NULL
;
5736 exp
= parse_exp_1 (&arg
, 0, 0);
5738 exp_valid_block
= innermost_block
;
5739 mark
= value_mark ();
5740 val
= evaluate_expression (exp
);
5741 release_value (val
);
5742 if (VALUE_LAZY (val
))
5743 value_fetch_lazy (val
);
5746 while (*tok
== ' ' || *tok
== '\t')
5750 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5753 toklen
= end_tok
- tok
;
5754 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5756 tok
= cond_start
= end_tok
+ 1;
5757 cond
= parse_exp_1 (&tok
, 0, 0);
5761 error ("Junk at end of command.");
5763 if (accessflag
== hw_read
)
5764 bp_type
= bp_read_watchpoint
;
5765 else if (accessflag
== hw_access
)
5766 bp_type
= bp_access_watchpoint
;
5768 bp_type
= bp_hardware_watchpoint
;
5770 mem_cnt
= can_use_hardware_watchpoint (val
);
5771 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5772 error ("Expression cannot be implemented with read/access watchpoint.");
5775 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5776 target_resources_ok
=
5777 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5779 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5780 error ("Target does not support this type of hardware watchpoint.");
5782 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5783 error ("Target can only support one kind of HW watchpoint at a time.");
5786 #if defined(HPUXHPPA)
5787 /* On HP-UX if you set a h/w
5788 watchpoint before the "run" command, the inferior dies with a e.g.,
5789 SIGILL once you start it. I initially believed this was due to a
5790 bad interaction between page protection traps and the initial
5791 startup sequence by the dynamic linker.
5793 However, I tried avoiding that by having HP-UX's implementation of
5794 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5795 yet, which forced slow watches before a "run" or "attach", and it
5796 still fails somewhere in the startup code.
5798 Until I figure out what's happening, I'm disallowing watches altogether
5799 before the "run" or "attach" command. We'll tell the user they must
5800 set watches after getting the program started. */
5801 if (!target_has_execution
)
5803 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5806 #endif /* HPUXHPPA */
5808 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5809 watchpoint could not be set. */
5810 if (!mem_cnt
|| target_resources_ok
<= 0)
5811 bp_type
= bp_watchpoint
;
5813 /* Now set up the breakpoint. */
5814 b
= set_raw_breakpoint (sal
, bp_type
);
5815 set_breakpoint_count (breakpoint_count
+ 1);
5816 b
->number
= breakpoint_count
;
5817 b
->disposition
= disp_donttouch
;
5819 b
->exp_valid_block
= exp_valid_block
;
5820 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5824 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5828 frame
= block_innermost_frame (exp_valid_block
);
5831 prev_frame
= get_prev_frame (frame
);
5832 b
->watchpoint_frame
= get_frame_id (frame
);
5836 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5839 /* If the expression is "local", then set up a "watchpoint scope"
5840 breakpoint at the point where we've left the scope of the watchpoint
5842 if (innermost_block
)
5846 struct breakpoint
*scope_breakpoint
;
5847 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5848 bp_watchpoint_scope
);
5850 scope_breakpoint
->enable_state
= bp_enabled
;
5852 /* Automatically delete the breakpoint when it hits. */
5853 scope_breakpoint
->disposition
= disp_del
;
5855 /* Only break in the proper frame (help with recursion). */
5856 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5858 /* Set the address at which we will stop. */
5859 scope_breakpoint
->loc
->requested_address
5860 = get_frame_pc (prev_frame
);
5861 scope_breakpoint
->loc
->address
5862 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
);
5864 /* The scope breakpoint is related to the watchpoint. We
5865 will need to act on them together. */
5866 b
->related_breakpoint
= scope_breakpoint
;
5869 value_free_to_mark (mark
);
5873 /* Return count of locations need to be watched and can be handled
5874 in hardware. If the watchpoint can not be handled
5875 in hardware return zero. */
5877 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5878 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5879 ((BYTE_SIZE) <= (DEPRECATED_REGISTER_SIZE))
5882 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5883 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5884 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5888 can_use_hardware_watchpoint (struct value
*v
)
5890 int found_memory_cnt
= 0;
5891 struct value
*head
= v
;
5893 /* Did the user specifically forbid us to use hardware watchpoints? */
5894 if (!can_use_hw_watchpoints
)
5897 /* Make sure that the value of the expression depends only upon
5898 memory contents, and values computed from them within GDB. If we
5899 find any register references or function calls, we can't use a
5900 hardware watchpoint.
5902 The idea here is that evaluating an expression generates a series
5903 of values, one holding the value of every subexpression. (The
5904 expression a*b+c has five subexpressions: a, b, a*b, c, and
5905 a*b+c.) GDB's values hold almost enough information to establish
5906 the criteria given above --- they identify memory lvalues,
5907 register lvalues, computed values, etcetera. So we can evaluate
5908 the expression, and then scan the chain of values that leaves
5909 behind to decide whether we can detect any possible change to the
5910 expression's final value using only hardware watchpoints.
5912 However, I don't think that the values returned by inferior
5913 function calls are special in any way. So this function may not
5914 notice that an expression involving an inferior function call
5915 can't be watched with hardware watchpoints. FIXME. */
5916 for (; v
; v
= v
->next
)
5918 if (VALUE_LVAL (v
) == lval_memory
)
5921 /* A lazy memory lvalue is one that GDB never needed to fetch;
5922 we either just used its address (e.g., `a' in `a.b') or
5923 we never needed it at all (e.g., `a' in `a,b'). */
5927 /* Ahh, memory we actually used! Check if we can cover
5928 it with hardware watchpoints. */
5929 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
5931 /* We only watch structs and arrays if user asked for it
5932 explicitly, never if they just happen to appear in a
5933 middle of some value chain. */
5935 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5936 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5938 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
5939 int len
= TYPE_LENGTH (VALUE_TYPE (v
));
5941 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5948 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
5949 return 0; /* ??? What does this represent? */
5950 else if (v
->lval
== lval_register
)
5951 return 0; /* cannot watch a register with a HW watchpoint */
5954 /* The expression itself looks suitable for using a hardware
5955 watchpoint, but give the target machine a chance to reject it. */
5956 return found_memory_cnt
;
5960 watch_command_wrapper (char *arg
, int from_tty
)
5962 watch_command (arg
, from_tty
);
5966 watch_command (char *arg
, int from_tty
)
5968 watch_command_1 (arg
, hw_write
, from_tty
);
5972 rwatch_command_wrapper (char *arg
, int from_tty
)
5974 rwatch_command (arg
, from_tty
);
5978 rwatch_command (char *arg
, int from_tty
)
5980 watch_command_1 (arg
, hw_read
, from_tty
);
5984 awatch_command_wrapper (char *arg
, int from_tty
)
5986 awatch_command (arg
, from_tty
);
5990 awatch_command (char *arg
, int from_tty
)
5992 watch_command_1 (arg
, hw_access
, from_tty
);
5996 /* Helper routines for the until_command routine in infcmd.c. Here
5997 because it uses the mechanisms of breakpoints. */
5999 /* This function is called by fetch_inferior_event via the
6000 cmd_continuation pointer, to complete the until command. It takes
6001 care of cleaning up the temporary breakpoints set up by the until
6004 until_break_command_continuation (struct continuation_arg
*arg
)
6006 struct cleanup
*cleanups
;
6008 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
6009 do_exec_cleanups (cleanups
);
6013 until_break_command (char *arg
, int from_tty
, int anywhere
)
6015 struct symtabs_and_lines sals
;
6016 struct symtab_and_line sal
;
6017 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
6018 struct breakpoint
*breakpoint
;
6019 struct cleanup
*old_chain
;
6020 struct continuation_arg
*arg1
;
6023 clear_proceed_status ();
6025 /* Set a breakpoint where the user wants it and at return from
6028 if (default_breakpoint_valid
)
6029 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
6030 default_breakpoint_line
, (char ***) NULL
, NULL
);
6032 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
6033 0, (char ***) NULL
, NULL
);
6035 if (sals
.nelts
!= 1)
6036 error ("Couldn't get information on specified line.");
6039 xfree (sals
.sals
); /* malloc'd, so freed */
6042 error ("Junk at end of arguments.");
6044 resolve_sal_pc (&sal
);
6047 /* If the user told us to continue until a specified location,
6048 we don't specify a frame at which we need to stop. */
6049 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
6051 /* Otherwise, specify the current frame, because we want to stop only
6052 at the very same frame. */
6053 breakpoint
= set_momentary_breakpoint (sal
,
6054 get_frame_id (deprecated_selected_frame
),
6057 if (!event_loop_p
|| !target_can_async_p ())
6058 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
6060 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
6062 /* If we are running asynchronously, and the target supports async
6063 execution, we are not waiting for the target to stop, in the call
6064 tp proceed, below. This means that we cannot delete the
6065 brekpoints until the target has actually stopped. The only place
6066 where we get a chance to do that is in fetch_inferior_event, so
6067 we must set things up for that. */
6069 if (event_loop_p
&& target_can_async_p ())
6071 /* In this case the arg for the continuation is just the point
6072 in the exec_cleanups chain from where to start doing
6073 cleanups, because all the continuation does is the cleanups in
6074 the exec_cleanup_chain. */
6076 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
6078 arg1
->data
.pointer
= old_chain
;
6080 add_continuation (until_break_command_continuation
, arg1
);
6083 /* Keep within the current frame, or in frames called by the current
6087 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6088 sal
.pc
= get_frame_pc (prev_frame
);
6089 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6091 if (!event_loop_p
|| !target_can_async_p ())
6092 make_cleanup_delete_breakpoint (breakpoint
);
6094 make_exec_cleanup_delete_breakpoint (breakpoint
);
6097 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6098 /* Do the cleanups now, anly if we are not running asynchronously,
6099 of if we are, but the target is still synchronous. */
6100 if (!event_loop_p
|| !target_can_async_p ())
6101 do_cleanups (old_chain
);
6105 ep_skip_leading_whitespace (char **s
)
6107 if ((s
== NULL
) || (*s
== NULL
))
6109 while (isspace (**s
))
6113 /* This function examines a string, and attempts to find a token
6114 that might be an event name in the leading characters. If a
6115 possible match is found, a pointer to the last character of
6116 the token is returned. Else, NULL is returned. */
6119 ep_find_event_name_end (char *arg
)
6122 char *event_name_end
= NULL
;
6124 /* If we could depend upon the presense of strrpbrk, we'd use that... */
6128 /* We break out of the loop when we find a token delimiter.
6129 Basically, we're looking for alphanumerics and underscores;
6130 anything else delimites the token. */
6133 if (!isalnum (*s
) && (*s
!= '_'))
6139 return event_name_end
;
6143 /* This function attempts to parse an optional "if <cond>" clause
6144 from the arg string. If one is not found, it returns NULL.
6146 Else, it returns a pointer to the condition string. (It does not
6147 attempt to evaluate the string against a particular block.) And,
6148 it updates arg to point to the first character following the parsed
6149 if clause in the arg string. */
6152 ep_parse_optional_if_clause (char **arg
)
6156 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6159 /* Skip the "if" keyword. */
6162 /* Skip any extra leading whitespace, and record the start of the
6163 condition string. */
6164 ep_skip_leading_whitespace (arg
);
6167 /* Assume that the condition occupies the remainder of the arg string. */
6168 (*arg
) += strlen (cond_string
);
6173 /* This function attempts to parse an optional filename from the arg
6174 string. If one is not found, it returns NULL.
6176 Else, it returns a pointer to the parsed filename. (This function
6177 makes no attempt to verify that a file of that name exists, or is
6178 accessible.) And, it updates arg to point to the first character
6179 following the parsed filename in the arg string.
6181 Note that clients needing to preserve the returned filename for
6182 future access should copy it to their own buffers. */
6184 ep_parse_optional_filename (char **arg
)
6186 static char filename
[1024];
6191 if ((*arg_p
== '\0') || isspace (*arg_p
))
6209 /* Commands to deal with catching events, such as signals, exceptions,
6210 process start/exit, etc. */
6214 catch_fork
, catch_vfork
6219 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6222 char *cond_string
= NULL
;
6224 ep_skip_leading_whitespace (&arg
);
6226 /* The allowed syntax is:
6228 catch [v]fork if <cond>
6230 First, check if there's an if clause. */
6231 cond_string
= ep_parse_optional_if_clause (&arg
);
6233 if ((*arg
!= '\0') && !isspace (*arg
))
6234 error ("Junk at end of arguments.");
6236 /* If this target supports it, create a fork or vfork catchpoint
6237 and enable reporting of such events. */
6241 create_fork_event_catchpoint (tempflag
, cond_string
);
6244 create_vfork_event_catchpoint (tempflag
, cond_string
);
6247 error ("unsupported or unknown fork kind; cannot catch it");
6253 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6255 char *cond_string
= NULL
;
6257 ep_skip_leading_whitespace (&arg
);
6259 /* The allowed syntax is:
6261 catch exec if <cond>
6263 First, check if there's an if clause. */
6264 cond_string
= ep_parse_optional_if_clause (&arg
);
6266 if ((*arg
!= '\0') && !isspace (*arg
))
6267 error ("Junk at end of arguments.");
6269 /* If this target supports it, create an exec catchpoint
6270 and enable reporting of such events. */
6271 create_exec_event_catchpoint (tempflag
, cond_string
);
6275 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6277 char *dll_pathname
= NULL
;
6278 char *cond_string
= NULL
;
6280 ep_skip_leading_whitespace (&arg
);
6282 /* The allowed syntax is:
6284 catch load if <cond>
6285 catch load <filename>
6286 catch load <filename> if <cond>
6288 The user is not allowed to specify the <filename> after an
6291 We'll ignore the pathological case of a file named "if".
6293 First, check if there's an if clause. If so, then there
6294 cannot be a filename. */
6295 cond_string
= ep_parse_optional_if_clause (&arg
);
6297 /* If there was an if clause, then there cannot be a filename.
6298 Else, there might be a filename and an if clause. */
6299 if (cond_string
== NULL
)
6301 dll_pathname
= ep_parse_optional_filename (&arg
);
6302 ep_skip_leading_whitespace (&arg
);
6303 cond_string
= ep_parse_optional_if_clause (&arg
);
6306 if ((*arg
!= '\0') && !isspace (*arg
))
6307 error ("Junk at end of arguments.");
6309 /* Create a load breakpoint that only triggers when a load of
6310 the specified dll (or any dll, if no pathname was specified)
6312 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6313 dll_pathname
, cond_string
);
6317 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6319 char *dll_pathname
= NULL
;
6320 char *cond_string
= NULL
;
6322 ep_skip_leading_whitespace (&arg
);
6324 /* The allowed syntax is:
6326 catch unload if <cond>
6327 catch unload <filename>
6328 catch unload <filename> if <cond>
6330 The user is not allowed to specify the <filename> after an
6333 We'll ignore the pathological case of a file named "if".
6335 First, check if there's an if clause. If so, then there
6336 cannot be a filename. */
6337 cond_string
= ep_parse_optional_if_clause (&arg
);
6339 /* If there was an if clause, then there cannot be a filename.
6340 Else, there might be a filename and an if clause. */
6341 if (cond_string
== NULL
)
6343 dll_pathname
= ep_parse_optional_filename (&arg
);
6344 ep_skip_leading_whitespace (&arg
);
6345 cond_string
= ep_parse_optional_if_clause (&arg
);
6348 if ((*arg
!= '\0') && !isspace (*arg
))
6349 error ("Junk at end of arguments.");
6351 /* Create an unload breakpoint that only triggers when an unload of
6352 the specified dll (or any dll, if no pathname was specified)
6354 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6355 dll_pathname
, cond_string
);
6358 /* Commands to deal with catching exceptions. */
6360 /* Set a breakpoint at the specified callback routine for an
6361 exception event callback */
6364 create_exception_catchpoint (int tempflag
, char *cond_string
,
6365 enum exception_event_kind ex_event
,
6366 struct symtab_and_line
*sal
)
6368 struct breakpoint
*b
;
6369 int thread
= -1; /* All threads. */
6372 if (!sal
) /* no exception support? */
6377 case EX_EVENT_THROW
:
6378 bptype
= bp_catch_throw
;
6380 case EX_EVENT_CATCH
:
6381 bptype
= bp_catch_catch
;
6383 default: /* error condition */
6384 error ("Internal error -- invalid catchpoint kind");
6387 b
= set_raw_breakpoint (*sal
, bptype
);
6388 set_breakpoint_count (breakpoint_count
+ 1);
6389 b
->number
= breakpoint_count
;
6391 b
->cond_string
= (cond_string
== NULL
) ?
6392 NULL
: savestring (cond_string
, strlen (cond_string
));
6394 b
->addr_string
= NULL
;
6395 b
->enable_state
= bp_enabled
;
6396 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6400 static enum print_stop_action
6401 print_exception_catchpoint (struct breakpoint
*b
)
6403 annotate_catchpoint (b
->number
);
6405 if (strstr (b
->addr_string
, "throw") != NULL
)
6406 printf_filtered ("\nCatchpoint %d (exception thrown)\n",
6409 printf_filtered ("\nCatchpoint %d (exception caught)\n",
6412 return PRINT_SRC_AND_LOC
;
6416 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6421 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6424 *last_addr
= b
->loc
->address
;
6425 if (strstr (b
->addr_string
, "throw") != NULL
)
6426 ui_out_field_string (uiout
, "what", "exception throw");
6428 ui_out_field_string (uiout
, "what", "exception catch");
6432 print_mention_exception_catchpoint (struct breakpoint
*b
)
6434 if (strstr (b
->addr_string
, "throw") != NULL
)
6435 printf_filtered ("Catchpoint %d (throw)", b
->number
);
6437 printf_filtered ("Catchpoint %d (catch)", b
->number
);
6440 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6441 print_exception_catchpoint
,
6442 print_one_exception_catchpoint
,
6443 print_mention_exception_catchpoint
6447 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6448 enum exception_event_kind ex_event
, int from_tty
)
6450 char *trigger_func_name
, *nameptr
;
6451 struct symtabs_and_lines sals
;
6452 struct breakpoint
*b
;
6454 if (ex_event
== EX_EVENT_CATCH
)
6455 trigger_func_name
= xstrdup ("__cxa_begin_catch");
6457 trigger_func_name
= xstrdup ("__cxa_throw");
6459 nameptr
= trigger_func_name
;
6460 sals
= decode_line_1 (&nameptr
, 1, NULL
, 0, NULL
, NULL
);
6461 if (sals
.nelts
== 0)
6463 xfree (trigger_func_name
);
6467 b
= set_raw_breakpoint (sals
.sals
[0], bp_breakpoint
);
6468 set_breakpoint_count (breakpoint_count
+ 1);
6469 b
->number
= breakpoint_count
;
6471 b
->cond_string
= (cond_string
== NULL
) ?
6472 NULL
: savestring (cond_string
, strlen (cond_string
));
6474 b
->addr_string
= trigger_func_name
;
6475 b
->enable_state
= bp_enabled
;
6476 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6477 b
->ops
= &gnu_v3_exception_catchpoint_ops
;
6484 /* Deal with "catch catch" and "catch throw" commands */
6487 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6488 int tempflag
, int from_tty
)
6490 char *cond_string
= NULL
;
6491 struct symtab_and_line
*sal
= NULL
;
6493 ep_skip_leading_whitespace (&arg
);
6495 cond_string
= ep_parse_optional_if_clause (&arg
);
6497 if ((*arg
!= '\0') && !isspace (*arg
))
6498 error ("Junk at end of arguments.");
6500 if ((ex_event
!= EX_EVENT_THROW
) &&
6501 (ex_event
!= EX_EVENT_CATCH
))
6502 error ("Unsupported or unknown exception event; cannot catch it");
6504 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6507 /* See if we can find a callback routine */
6508 sal
= target_enable_exception_callback (ex_event
, 1);
6512 /* We have callbacks from the runtime system for exceptions.
6513 Set a breakpoint on the sal found, if no errors */
6514 if (sal
!= (struct symtab_and_line
*) -1)
6515 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6517 return; /* something went wrong with setting up callbacks */
6520 warning ("Unsupported with this platform/compiler combination.");
6523 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6524 inside a catch_errors */
6527 cover_target_enable_exception_callback (void *arg
)
6529 args_for_catchpoint_enable
*args
= arg
;
6530 struct symtab_and_line
*sal
;
6531 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6534 else if (sal
== (struct symtab_and_line
*) -1)
6537 return 1; /*is valid */
6541 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6544 /* The first argument may be an event name, such as "start" or "load".
6545 If so, then handle it as such. If it doesn't match an event name,
6546 then attempt to interpret it as an exception name. (This latter is
6547 the v4.16-and-earlier GDB meaning of the "catch" command.)
6549 First, try to find the bounds of what might be an event name. */
6550 char *arg1_start
= arg
;
6554 if (arg1_start
== NULL
)
6556 /* Old behaviour was to use pre-v-4.16 syntax */
6557 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6559 /* Now, this is not allowed */
6560 error ("Catch requires an event name.");
6563 arg1_end
= ep_find_event_name_end (arg1_start
);
6564 if (arg1_end
== NULL
)
6565 error ("catch requires an event");
6566 arg1_length
= arg1_end
+ 1 - arg1_start
;
6568 /* Try to match what we found against known event names. */
6569 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6571 error ("Catch of signal not yet implemented");
6573 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6575 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6576 tempflag
, from_tty
);
6578 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6580 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6581 tempflag
, from_tty
);
6583 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6585 error ("Catch of thread_start not yet implemented");
6587 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6589 error ("Catch of thread_exit not yet implemented");
6591 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6593 error ("Catch of thread_join not yet implemented");
6595 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6597 error ("Catch of start not yet implemented");
6599 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6601 error ("Catch of exit not yet implemented");
6603 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6605 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6607 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6609 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6611 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6613 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6615 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6617 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6619 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6621 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6623 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6625 error ("Catch of stop not yet implemented");
6628 /* This doesn't appear to be an event name */
6632 /* Pre-v.4.16 behaviour was to treat the argument
6633 as the name of an exception */
6634 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6635 /* Now this is not allowed */
6636 error ("Unknown event kind specified for catch");
6641 /* Used by the gui, could be made a worker for other things. */
6644 set_breakpoint_sal (struct symtab_and_line sal
)
6646 struct breakpoint
*b
;
6647 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6648 set_breakpoint_count (breakpoint_count
+ 1);
6649 b
->number
= breakpoint_count
;
6656 catch_command (char *arg
, int from_tty
)
6658 catch_command_1 (arg
, 0, from_tty
);
6663 tcatch_command (char *arg
, int from_tty
)
6665 catch_command_1 (arg
, 1, from_tty
);
6668 /* Delete breakpoints by address or line. */
6671 clear_command (char *arg
, int from_tty
)
6673 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6675 struct symtabs_and_lines sals
;
6676 struct symtab_and_line sal
;
6681 sals
= decode_line_spec (arg
, 1);
6686 sals
.sals
= (struct symtab_and_line
*)
6687 xmalloc (sizeof (struct symtab_and_line
));
6688 make_cleanup (xfree
, sals
.sals
);
6689 init_sal (&sal
); /* initialize to zeroes */
6690 sal
.line
= default_breakpoint_line
;
6691 sal
.symtab
= default_breakpoint_symtab
;
6692 sal
.pc
= default_breakpoint_address
;
6693 if (sal
.symtab
== 0)
6694 error ("No source file specified.");
6702 /* For each line spec given, delete bps which correspond
6703 to it. Do it in two passes, solely to preserve the current
6704 behavior that from_tty is forced true if we delete more than
6708 for (i
= 0; i
< sals
.nelts
; i
++)
6710 /* If exact pc given, clear bpts at that pc.
6711 If line given (pc == 0), clear all bpts on specified line.
6712 If defaulting, clear all bpts on default line
6715 defaulting sal.pc != 0 tests to do
6720 1 0 <can't happen> */
6725 /* Find all matching breakpoints, remove them from the
6726 breakpoint chain, and add them to the 'found' chain. */
6727 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6729 /* Are we going to delete b? */
6730 if (b
->type
!= bp_none
6731 && b
->type
!= bp_watchpoint
6732 && b
->type
!= bp_hardware_watchpoint
6733 && b
->type
!= bp_read_watchpoint
6734 && b
->type
!= bp_access_watchpoint
6735 /* Not if b is a watchpoint of any sort... */
6736 && (((sal
.pc
&& (b
->loc
->address
== sal
.pc
))
6737 && (!section_is_overlay (b
->loc
->section
)
6738 || b
->loc
->section
== sal
.section
))
6739 /* Yes, if sal.pc matches b (modulo overlays). */
6740 || ((default_match
|| (0 == sal
.pc
))
6741 && b
->source_file
!= NULL
6742 && sal
.symtab
!= NULL
6743 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6744 && b
->line_number
== sal
.line
)))
6745 /* Yes, if sal source file and line matches b. */
6747 /* Remove it from breakpoint_chain... */
6748 if (b
== breakpoint_chain
)
6750 /* b is at the head of the list */
6751 breakpoint_chain
= b
->next
;
6755 prev
->next
= b
->next
;
6757 /* And add it to 'found' chain. */
6763 /* Keep b, and keep a pointer to it. */
6768 /* Now go thru the 'found' chain and delete them. */
6772 error ("No breakpoint at %s.", arg
);
6774 error ("No breakpoint at this line.");
6778 from_tty
= 1; /* Always report if deleted more than one */
6780 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6781 breakpoints_changed ();
6785 printf_unfiltered ("%d ", found
->number
);
6787 delete_breakpoint (found
);
6791 putchar_unfiltered ('\n');
6794 /* Delete breakpoint in BS if they are `delete' breakpoints and
6795 all breakpoints that are marked for deletion, whether hit or not.
6796 This is called after any breakpoint is hit, or after errors. */
6799 breakpoint_auto_delete (bpstat bs
)
6801 struct breakpoint
*b
, *temp
;
6803 for (; bs
; bs
= bs
->next
)
6804 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6806 delete_breakpoint (bs
->breakpoint_at
);
6808 ALL_BREAKPOINTS_SAFE (b
, temp
)
6810 if (b
->disposition
== disp_del_at_next_stop
)
6811 delete_breakpoint (b
);
6815 /* Delete a breakpoint and clean up all traces of it in the data
6819 delete_breakpoint (struct breakpoint
*bpt
)
6821 struct breakpoint
*b
;
6823 struct bp_location
*loc
;
6826 error ("Internal error (attempted to delete a NULL breakpoint)");
6829 /* Has this bp already been deleted? This can happen because multiple
6830 lists can hold pointers to bp's. bpstat lists are especial culprits.
6832 One example of this happening is a watchpoint's scope bp. When the
6833 scope bp triggers, we notice that the watchpoint is out of scope, and
6834 delete it. We also delete its scope bp. But the scope bp is marked
6835 "auto-deleting", and is already on a bpstat. That bpstat is then
6836 checked for auto-deleting bp's, which are deleted.
6838 A real solution to this problem might involve reference counts in bp's,
6839 and/or giving them pointers back to their referencing bpstat's, and
6840 teaching delete_breakpoint to only free a bp's storage when no more
6841 references were extent. A cheaper bandaid was chosen. */
6842 if (bpt
->type
== bp_none
)
6845 if (delete_breakpoint_hook
)
6846 delete_breakpoint_hook (bpt
);
6847 breakpoint_delete_event (bpt
->number
);
6849 if (bpt
->loc
->inserted
)
6850 remove_breakpoint (bpt
->loc
, mark_inserted
);
6852 if (breakpoint_chain
== bpt
)
6853 breakpoint_chain
= bpt
->next
;
6855 if (bp_location_chain
== bpt
->loc
)
6856 bp_location_chain
= bpt
->loc
->next
;
6858 /* If we have callback-style exception catchpoints, don't go through
6859 the adjustments to the C++ runtime library etc. if the inferior
6860 isn't actually running. target_enable_exception_callback for a
6861 null target ops vector gives an undesirable error message, so we
6862 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6863 exceptions are supported in this way, it's OK for now. FIXME */
6864 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6866 /* Format possible error msg */
6867 char *message
= xstrprintf ("Error in deleting catchpoint %d:\n",
6869 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
6870 args_for_catchpoint_enable args
;
6871 args
.kind
= bpt
->type
== bp_catch_catch
?
6872 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6874 catch_errors (cover_target_enable_exception_callback
, &args
,
6875 message
, RETURN_MASK_ALL
);
6876 do_cleanups (cleanups
);
6883 b
->next
= bpt
->next
;
6887 ALL_BP_LOCATIONS (loc
)
6888 if (loc
->next
== bpt
->loc
)
6890 loc
->next
= bpt
->loc
->next
;
6894 check_duplicates (bpt
);
6895 /* If this breakpoint was inserted, and there is another breakpoint
6896 at the same address, we need to insert the other breakpoint. */
6897 if (bpt
->loc
->inserted
6898 && bpt
->type
!= bp_hardware_watchpoint
6899 && bpt
->type
!= bp_read_watchpoint
6900 && bpt
->type
!= bp_access_watchpoint
6901 && bpt
->type
!= bp_catch_fork
6902 && bpt
->type
!= bp_catch_vfork
6903 && bpt
->type
!= bp_catch_exec
)
6906 if (b
->loc
->address
== bpt
->loc
->address
6907 && b
->loc
->section
== bpt
->loc
->section
6908 && !b
->loc
->duplicate
6909 && b
->enable_state
!= bp_disabled
6910 && b
->enable_state
!= bp_shlib_disabled
6912 && b
->enable_state
!= bp_call_disabled
)
6916 /* We should never reach this point if there is a permanent
6917 breakpoint at the same address as the one being deleted.
6918 If there is a permanent breakpoint somewhere, it should
6919 always be the only one inserted. */
6920 if (b
->enable_state
== bp_permanent
)
6921 internal_error (__FILE__
, __LINE__
,
6922 "another breakpoint was inserted on top of "
6923 "a permanent breakpoint");
6925 if (b
->type
== bp_hardware_breakpoint
)
6926 val
= target_insert_hw_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6928 val
= target_insert_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6930 /* If there was an error in the insert, print a message, then stop execution. */
6933 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6934 make_cleanup_ui_file_delete (tmp_error_stream
);
6937 if (b
->type
== bp_hardware_breakpoint
)
6939 fprintf_unfiltered (tmp_error_stream
,
6940 "Cannot insert hardware breakpoint %d.\n"
6941 "You may have requested too many hardware breakpoints.\n",
6946 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6947 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6948 print_address_numeric (b
->loc
->address
, 1, tmp_error_stream
);
6949 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6950 safe_strerror (val
));
6953 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6954 target_terminal_ours_for_output ();
6955 error_stream(tmp_error_stream
);
6958 b
->loc
->inserted
= 1;
6962 free_command_lines (&bpt
->commands
);
6965 if (bpt
->cond_string
!= NULL
)
6966 xfree (bpt
->cond_string
);
6967 if (bpt
->addr_string
!= NULL
)
6968 xfree (bpt
->addr_string
);
6969 if (bpt
->exp
!= NULL
)
6971 if (bpt
->exp_string
!= NULL
)
6972 xfree (bpt
->exp_string
);
6973 if (bpt
->val
!= NULL
)
6974 value_free (bpt
->val
);
6975 if (bpt
->source_file
!= NULL
)
6976 xfree (bpt
->source_file
);
6977 if (bpt
->dll_pathname
!= NULL
)
6978 xfree (bpt
->dll_pathname
);
6979 if (bpt
->triggered_dll_pathname
!= NULL
)
6980 xfree (bpt
->triggered_dll_pathname
);
6981 if (bpt
->exec_pathname
!= NULL
)
6982 xfree (bpt
->exec_pathname
);
6984 /* Be sure no bpstat's are pointing at it after it's been freed. */
6985 /* FIXME, how can we find all bpstat's?
6986 We just check stop_bpstat for now. */
6987 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6988 if (bs
->breakpoint_at
== bpt
)
6990 bs
->breakpoint_at
= NULL
;
6992 /* bs->commands will be freed later. */
6994 /* On the chance that someone will soon try again to delete this same
6995 bp, we mark it as deleted before freeing its storage. */
6996 bpt
->type
= bp_none
;
7003 do_delete_breakpoint_cleanup (void *b
)
7005 delete_breakpoint (b
);
7009 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7011 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7015 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
7017 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
7021 delete_command (char *arg
, int from_tty
)
7023 struct breakpoint
*b
, *temp
;
7029 int breaks_to_delete
= 0;
7031 /* Delete all breakpoints if no argument.
7032 Do not delete internal or call-dummy breakpoints, these
7033 have to be deleted with an explicit breakpoint number argument. */
7036 if (b
->type
!= bp_call_dummy
&&
7037 b
->type
!= bp_shlib_event
&&
7038 b
->type
!= bp_thread_event
&&
7039 b
->type
!= bp_overlay_event
&&
7041 breaks_to_delete
= 1;
7044 /* Ask user only if there are some breakpoints to delete. */
7046 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
7048 ALL_BREAKPOINTS_SAFE (b
, temp
)
7050 if (b
->type
!= bp_call_dummy
&&
7051 b
->type
!= bp_shlib_event
&&
7052 b
->type
!= bp_thread_event
&&
7053 b
->type
!= bp_overlay_event
&&
7055 delete_breakpoint (b
);
7060 map_breakpoint_numbers (arg
, delete_breakpoint
);
7063 /* Reset a breakpoint given it's struct breakpoint * BINT.
7064 The value we return ends up being the return value from catch_errors.
7065 Unused in this case. */
7068 breakpoint_re_set_one (void *bint
)
7070 /* get past catch_errs */
7071 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7074 struct symtabs_and_lines sals
;
7076 enum enable_state save_enable
;
7081 warning ("attempted to reset apparently deleted breakpoint #%d?",
7085 case bp_hardware_breakpoint
:
7087 case bp_catch_unload
:
7088 if (b
->addr_string
== NULL
)
7090 /* Anything without a string can't be re-set. */
7091 delete_breakpoint (b
);
7094 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
7096 ``And a hack it is, although Apple's Darwin version of GDB
7097 contains an almost identical hack to implement a "future
7098 break" command. It seems to work in many real world cases,
7099 but it is easy to come up with a test case where the patch
7100 doesn't help at all.''
7102 ``It seems that the way GDB implements breakpoints - in -
7103 shared - libraries was designed for a.out shared library
7104 systems (SunOS 4) where shared libraries were loaded at a
7105 fixed address in memory. Since ELF shared libraries can (and
7106 will) be loaded at any address in memory, things break.
7107 Fixing this is not trivial. Therefore, I'm not sure whether
7108 we should add this hack to the branch only. I cannot
7109 guarantee that things will be fixed on the trunk in the near
7112 In case we have a problem, disable this breakpoint. We'll
7113 restore its status if we succeed. Don't disable a
7114 shlib_disabled breakpoint though. There's a fair chance we
7115 can't re-set it if the shared library it's in hasn't been
7121 save_enable
= b
->enable_state
;
7122 if (b
->enable_state
!= bp_shlib_disabled
)
7123 b
->enable_state
= bp_disabled
;
7125 set_language (b
->language
);
7126 input_radix
= b
->input_radix
;
7128 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7129 for (i
= 0; i
< sals
.nelts
; i
++)
7131 resolve_sal_pc (&sals
.sals
[i
]);
7133 /* Reparse conditions, they might contain references to the
7135 if (b
->cond_string
!= NULL
)
7141 /* Avoid re-freeing b->exp if an error during the call
7145 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
7148 /* We need to re-set the breakpoint if the address changes... */
7149 if (b
->loc
->address
!= sals
.sals
[i
].pc
7150 /* ...or new and old breakpoints both have source files, and
7151 the source file name or the line number changes... */
7152 || (b
->source_file
!= NULL
7153 && sals
.sals
[i
].symtab
!= NULL
7154 && (strcmp (b
->source_file
, sals
.sals
[i
].symtab
->filename
) != 0
7155 || b
->line_number
!= sals
.sals
[i
].line
)
7157 /* ...or we switch between having a source file and not having
7159 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
7162 if (b
->source_file
!= NULL
)
7163 xfree (b
->source_file
);
7164 if (sals
.sals
[i
].symtab
== NULL
)
7165 b
->source_file
= NULL
;
7168 savestring (sals
.sals
[i
].symtab
->filename
,
7169 strlen (sals
.sals
[i
].symtab
->filename
));
7170 b
->line_number
= sals
.sals
[i
].line
;
7171 b
->loc
->requested_address
= sals
.sals
[i
].pc
;
7173 = adjust_breakpoint_address (b
->loc
->requested_address
);
7175 /* Used to check for duplicates here, but that can
7176 cause trouble, as it doesn't check for disabled
7181 /* Might be better to do this just once per breakpoint_re_set,
7182 rather than once for every breakpoint. */
7183 breakpoints_changed ();
7185 b
->loc
->section
= sals
.sals
[i
].section
;
7186 b
->enable_state
= save_enable
; /* Restore it, this worked. */
7189 /* Now that this is re-enabled, check_duplicates
7191 check_duplicates (b
);
7198 case bp_hardware_watchpoint
:
7199 case bp_read_watchpoint
:
7200 case bp_access_watchpoint
:
7201 innermost_block
= NULL
;
7202 /* The issue arises of what context to evaluate this in. The
7203 same one as when it was set, but what does that mean when
7204 symbols have been re-read? We could save the filename and
7205 functionname, but if the context is more local than that, the
7206 best we could do would be something like how many levels deep
7207 and which index at that particular level, but that's going to
7208 be less stable than filenames or function names. */
7210 /* So for now, just use a global context. */
7214 /* Avoid re-freeing b->exp if an error during the call to
7215 parse_expression. */
7218 b
->exp
= parse_expression (b
->exp_string
);
7219 b
->exp_valid_block
= innermost_block
;
7220 mark
= value_mark ();
7223 value_free (b
->val
);
7224 /* Avoid re-freeing b->val if an error during the call to
7225 evaluate_expression. */
7228 b
->val
= evaluate_expression (b
->exp
);
7229 release_value (b
->val
);
7230 if (VALUE_LAZY (b
->val
) && breakpoint_enabled (b
))
7231 value_fetch_lazy (b
->val
);
7233 if (b
->cond_string
!= NULL
)
7239 /* Avoid re-freeing b->exp if an error during the call
7243 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7245 if (breakpoint_enabled (b
))
7247 value_free_to_mark (mark
);
7249 case bp_catch_catch
:
7250 case bp_catch_throw
:
7252 /* We needn't really do anything to reset these, since the mask
7253 that requests them is unaffected by e.g., new libraries being
7256 case bp_catch_vfork
:
7261 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
7263 /* Delete longjmp and overlay event breakpoints; they will be
7264 reset later by breakpoint_re_set. */
7266 case bp_longjmp_resume
:
7267 case bp_overlay_event
:
7268 delete_breakpoint (b
);
7271 /* This breakpoint is special, it's set up when the inferior
7272 starts and we really don't want to touch it. */
7273 case bp_shlib_event
:
7275 /* Like bp_shlib_event, this breakpoint type is special.
7276 Once it is set up, we do not want to touch it. */
7277 case bp_thread_event
:
7279 /* Keep temporary breakpoints, which can be encountered when we step
7280 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7281 Otherwise these should have been blown away via the cleanup chain
7282 or by breakpoint_init_inferior when we rerun the executable. */
7285 case bp_watchpoint_scope
:
7287 case bp_step_resume
:
7294 /* Re-set all breakpoints after symbols have been re-loaded. */
7296 breakpoint_re_set (void)
7298 struct breakpoint
*b
, *temp
;
7299 enum language save_language
;
7300 int save_input_radix
;
7302 save_language
= current_language
->la_language
;
7303 save_input_radix
= input_radix
;
7304 ALL_BREAKPOINTS_SAFE (b
, temp
)
7306 /* Format possible error msg */
7307 char *message
= xstrprintf ("Error in re-setting breakpoint %d:\n",
7309 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7310 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7311 do_cleanups (cleanups
);
7313 set_language (save_language
);
7314 input_radix
= save_input_radix
;
7316 if (GET_LONGJMP_TARGET_P ())
7318 create_longjmp_breakpoint ("longjmp");
7319 create_longjmp_breakpoint ("_longjmp");
7320 create_longjmp_breakpoint ("siglongjmp");
7321 create_longjmp_breakpoint ("_siglongjmp");
7322 create_longjmp_breakpoint (NULL
);
7325 create_overlay_event_breakpoint ("_ovly_debug_event");
7328 /* Reset the thread number of this breakpoint:
7330 - If the breakpoint is for all threads, leave it as-is.
7331 - Else, reset it to the current thread for inferior_ptid. */
7333 breakpoint_re_set_thread (struct breakpoint
*b
)
7335 if (b
->thread
!= -1)
7337 if (in_thread_list (inferior_ptid
))
7338 b
->thread
= pid_to_thread_id (inferior_ptid
);
7342 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7343 If from_tty is nonzero, it prints a message to that effect,
7344 which ends with a period (no newline). */
7347 set_ignore_count (int bptnum
, int count
, int from_tty
)
7349 struct breakpoint
*b
;
7355 if (b
->number
== bptnum
)
7357 b
->ignore_count
= count
;
7361 printf_filtered ("Will stop next time breakpoint %d is reached.",
7363 else if (count
== 1)
7364 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7367 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7370 breakpoints_changed ();
7371 breakpoint_modify_event (b
->number
);
7375 error ("No breakpoint number %d.", bptnum
);
7378 /* Clear the ignore counts of all breakpoints. */
7380 breakpoint_clear_ignore_counts (void)
7382 struct breakpoint
*b
;
7385 b
->ignore_count
= 0;
7388 /* Command to set ignore-count of breakpoint N to COUNT. */
7391 ignore_command (char *args
, int from_tty
)
7397 error_no_arg ("a breakpoint number");
7399 num
= get_number (&p
);
7401 error ("bad breakpoint number: '%s'", args
);
7403 error ("Second argument (specified ignore-count) is missing.");
7405 set_ignore_count (num
,
7406 longest_to_int (value_as_long (parse_and_eval (p
))),
7409 printf_filtered ("\n");
7412 /* Call FUNCTION on each of the breakpoints
7413 whose numbers are given in ARGS. */
7416 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7421 struct breakpoint
*b
, *tmp
;
7425 error_no_arg ("one or more breakpoint numbers");
7432 num
= get_number_or_range (&p1
);
7435 warning ("bad breakpoint number at or near '%s'", p
);
7439 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7440 if (b
->number
== num
)
7442 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7445 if (related_breakpoint
)
7446 function (related_breakpoint
);
7450 printf_unfiltered ("No breakpoint number %d.\n", num
);
7456 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7457 If from_tty is nonzero, it prints a message to that effect,
7458 which ends with a period (no newline). */
7461 disable_breakpoint (struct breakpoint
*bpt
)
7463 /* Never disable a watchpoint scope breakpoint; we want to
7464 hit them when we leave scope so we can delete both the
7465 watchpoint and its scope breakpoint at that time. */
7466 if (bpt
->type
== bp_watchpoint_scope
)
7469 /* You can't disable permanent breakpoints. */
7470 if (bpt
->enable_state
== bp_permanent
)
7473 bpt
->enable_state
= bp_disabled
;
7475 check_duplicates (bpt
);
7477 if (modify_breakpoint_hook
)
7478 modify_breakpoint_hook (bpt
);
7479 breakpoint_modify_event (bpt
->number
);
7483 disable_command (char *args
, int from_tty
)
7485 struct breakpoint
*bpt
;
7487 ALL_BREAKPOINTS (bpt
)
7491 warning ("attempted to disable apparently deleted breakpoint #%d?",
7496 case bp_catch_unload
:
7498 case bp_catch_vfork
:
7500 case bp_catch_catch
:
7501 case bp_catch_throw
:
7502 case bp_hardware_breakpoint
:
7504 case bp_hardware_watchpoint
:
7505 case bp_read_watchpoint
:
7506 case bp_access_watchpoint
:
7507 disable_breakpoint (bpt
);
7512 map_breakpoint_numbers (args
, disable_breakpoint
);
7516 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7518 struct frame_info
*save_selected_frame
= NULL
;
7519 int save_selected_frame_level
= -1;
7520 int target_resources_ok
, other_type_used
;
7523 if (bpt
->type
== bp_hardware_breakpoint
)
7526 i
= hw_breakpoint_used_count ();
7527 target_resources_ok
=
7528 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7530 if (target_resources_ok
== 0)
7531 error ("No hardware breakpoint support in the target.");
7532 else if (target_resources_ok
< 0)
7533 error ("Hardware breakpoints used exceeds limit.");
7538 if (bpt
->enable_state
!= bp_enabled
)
7540 /* When enabling a pending breakpoint, we need to check if the breakpoint
7541 is resolvable since shared libraries could have been loaded
7542 after the breakpoint was disabled. */
7543 breakpoints_changed ();
7544 if (resolve_pending_breakpoint (bpt
) == GDB_RC_OK
)
7546 delete_breakpoint (bpt
);
7549 bpt
->enable_state
= bp_enabled
;
7550 bpt
->disposition
= disposition
;
7553 else /* Not a pending breakpoint. */
7555 if (bpt
->enable_state
!= bp_permanent
)
7556 bpt
->enable_state
= bp_enabled
;
7557 bpt
->disposition
= disposition
;
7558 check_duplicates (bpt
);
7559 breakpoints_changed ();
7561 if (bpt
->type
== bp_watchpoint
||
7562 bpt
->type
== bp_hardware_watchpoint
||
7563 bpt
->type
== bp_read_watchpoint
||
7564 bpt
->type
== bp_access_watchpoint
)
7566 if (bpt
->exp_valid_block
!= NULL
)
7568 struct frame_info
*fr
=
7569 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7573 Cannot enable watchpoint %d because the block in which its expression\n\
7574 is valid is not currently in scope.\n", bpt
->number
);
7575 bpt
->enable_state
= bp_disabled
;
7579 save_selected_frame
= deprecated_selected_frame
;
7580 save_selected_frame_level
= frame_relative_level (deprecated_selected_frame
);
7584 value_free (bpt
->val
);
7585 mark
= value_mark ();
7586 bpt
->val
= evaluate_expression (bpt
->exp
);
7587 release_value (bpt
->val
);
7588 if (VALUE_LAZY (bpt
->val
))
7589 value_fetch_lazy (bpt
->val
);
7591 if (bpt
->type
== bp_hardware_watchpoint
||
7592 bpt
->type
== bp_read_watchpoint
||
7593 bpt
->type
== bp_access_watchpoint
)
7595 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7596 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7598 /* Hack around 'unused var' error for some targets here */
7600 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7601 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7602 /* we can consider of type is bp_hardware_watchpoint, convert to
7603 bp_watchpoint in the following condition */
7604 if (target_resources_ok
< 0)
7607 Cannot enable watchpoint %d because target watch resources\n\
7608 have been allocated for other watchpoints.\n", bpt
->number
);
7609 bpt
->enable_state
= bp_disabled
;
7610 value_free_to_mark (mark
);
7615 if (save_selected_frame_level
>= 0)
7616 select_frame (save_selected_frame
);
7617 value_free_to_mark (mark
);
7621 if (modify_breakpoint_hook
)
7622 modify_breakpoint_hook (bpt
);
7623 breakpoint_modify_event (bpt
->number
);
7627 enable_breakpoint (struct breakpoint
*bpt
)
7629 do_enable_breakpoint (bpt
, bpt
->disposition
);
7632 /* The enable command enables the specified breakpoints (or all defined
7633 breakpoints) so they once again become (or continue to be) effective
7634 in stopping the inferior. */
7637 enable_command (char *args
, int from_tty
)
7639 struct breakpoint
*bpt
;
7641 ALL_BREAKPOINTS (bpt
)
7645 warning ("attempted to enable apparently deleted breakpoint #%d?",
7650 case bp_catch_unload
:
7652 case bp_catch_vfork
:
7654 case bp_catch_catch
:
7655 case bp_catch_throw
:
7656 case bp_hardware_breakpoint
:
7658 case bp_hardware_watchpoint
:
7659 case bp_read_watchpoint
:
7660 case bp_access_watchpoint
:
7661 enable_breakpoint (bpt
);
7666 map_breakpoint_numbers (args
, enable_breakpoint
);
7670 enable_once_breakpoint (struct breakpoint
*bpt
)
7672 do_enable_breakpoint (bpt
, disp_disable
);
7676 enable_once_command (char *args
, int from_tty
)
7678 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7682 enable_delete_breakpoint (struct breakpoint
*bpt
)
7684 do_enable_breakpoint (bpt
, disp_del
);
7688 enable_delete_command (char *args
, int from_tty
)
7690 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7693 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7695 struct symtabs_and_lines
7696 decode_line_spec_1 (char *string
, int funfirstline
)
7698 struct symtabs_and_lines sals
;
7700 error ("Empty line specification.");
7701 if (default_breakpoint_valid
)
7702 sals
= decode_line_1 (&string
, funfirstline
,
7703 default_breakpoint_symtab
,
7704 default_breakpoint_line
,
7705 (char ***) NULL
, NULL
);
7707 sals
= decode_line_1 (&string
, funfirstline
,
7708 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7710 error ("Junk at end of line specification: %s", string
);
7715 _initialize_breakpoint (void)
7717 struct cmd_list_element
*c
;
7719 breakpoint_chain
= 0;
7720 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7721 before a breakpoint is set. */
7722 breakpoint_count
= 0;
7724 add_com ("ignore", class_breakpoint
, ignore_command
,
7725 "Set ignore-count of breakpoint number N to COUNT.\n\
7726 Usage is `ignore N COUNT'.");
7728 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7730 add_com ("commands", class_breakpoint
, commands_command
,
7731 "Set commands to be executed when a breakpoint is hit.\n\
7732 Give breakpoint number as argument after \"commands\".\n\
7733 With no argument, the targeted breakpoint is the last one set.\n\
7734 The commands themselves follow starting on the next line.\n\
7735 Type a line containing \"end\" to indicate the end of them.\n\
7736 Give \"silent\" as the first line to make the breakpoint silent;\n\
7737 then no output is printed when it is hit, except what the commands print.");
7739 add_com ("condition", class_breakpoint
, condition_command
,
7740 "Specify breakpoint number N to break only if COND is true.\n\
7741 Usage is `condition N COND', where N is an integer and COND is an\n\
7742 expression to be evaluated whenever breakpoint N is reached.");
7744 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7745 "Set a temporary breakpoint. Args like \"break\" command.\n\
7746 Like \"break\" except the breakpoint is only temporary,\n\
7747 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7748 by using \"enable delete\" on the breakpoint number.");
7749 set_cmd_completer (c
, location_completer
);
7751 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7752 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7753 Like \"break\" except the breakpoint requires hardware support,\n\
7754 some target hardware may not have this support.");
7755 set_cmd_completer (c
, location_completer
);
7757 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7758 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7759 Like \"hbreak\" except the breakpoint is only temporary,\n\
7760 so it will be deleted when hit.");
7761 set_cmd_completer (c
, location_completer
);
7763 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7764 "Enable some breakpoints.\n\
7765 Give breakpoint numbers (separated by spaces) as arguments.\n\
7766 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7767 This is used to cancel the effect of the \"disable\" command.\n\
7768 With a subcommand you can enable temporarily.",
7769 &enablelist
, "enable ", 1, &cmdlist
);
7771 add_com ("ab", class_breakpoint
, enable_command
,
7772 "Enable some breakpoints.\n\
7773 Give breakpoint numbers (separated by spaces) as arguments.\n\
7774 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7775 This is used to cancel the effect of the \"disable\" command.\n\
7776 With a subcommand you can enable temporarily.");
7778 add_com_alias ("en", "enable", class_breakpoint
, 1);
7780 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7781 "Enable some breakpoints.\n\
7782 Give breakpoint numbers (separated by spaces) as arguments.\n\
7783 This is used to cancel the effect of the \"disable\" command.\n\
7784 May be abbreviated to simply \"enable\".\n",
7785 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7787 add_cmd ("once", no_class
, enable_once_command
,
7788 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7789 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7792 add_cmd ("delete", no_class
, enable_delete_command
,
7793 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7794 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7797 add_cmd ("delete", no_class
, enable_delete_command
,
7798 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7799 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7802 add_cmd ("once", no_class
, enable_once_command
,
7803 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7804 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7807 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7808 "Disable some breakpoints.\n\
7809 Arguments are breakpoint numbers with spaces in between.\n\
7810 To disable all breakpoints, give no argument.\n\
7811 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7812 &disablelist
, "disable ", 1, &cmdlist
);
7813 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7814 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7816 add_com ("sb", class_breakpoint
, disable_command
,
7817 "Disable some breakpoints.\n\
7818 Arguments are breakpoint numbers with spaces in between.\n\
7819 To disable all breakpoints, give no argument.\n\
7820 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7822 add_cmd ("breakpoints", class_alias
, disable_command
,
7823 "Disable some breakpoints.\n\
7824 Arguments are breakpoint numbers with spaces in between.\n\
7825 To disable all breakpoints, give no argument.\n\
7826 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7827 This command may be abbreviated \"disable\".",
7830 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7831 "Delete some breakpoints or auto-display expressions.\n\
7832 Arguments are breakpoint numbers with spaces in between.\n\
7833 To delete all breakpoints, give no argument.\n\
7835 Also a prefix command for deletion of other GDB objects.\n\
7836 The \"unset\" command is also an alias for \"delete\".",
7837 &deletelist
, "delete ", 1, &cmdlist
);
7838 add_com_alias ("d", "delete", class_breakpoint
, 1);
7840 add_com ("db", class_breakpoint
, delete_command
,
7841 "Delete some breakpoints.\n\
7842 Arguments are breakpoint numbers with spaces in between.\n\
7843 To delete all breakpoints, give no argument.\n");
7845 add_cmd ("breakpoints", class_alias
, delete_command
,
7846 "Delete some breakpoints or auto-display expressions.\n\
7847 Arguments are breakpoint numbers with spaces in between.\n\
7848 To delete all breakpoints, give no argument.\n\
7849 This command may be abbreviated \"delete\".",
7852 add_com ("clear", class_breakpoint
, clear_command
,
7853 concat ("Clear breakpoint at specified line or function.\n\
7854 Argument may be line number, function name, or \"*\" and an address.\n\
7855 If line number is specified, all breakpoints in that line are cleared.\n\
7856 If function is specified, breakpoints at beginning of function are cleared.\n\
7857 If an address is specified, breakpoints at that address are cleared.\n\n",
7858 "With no argument, clears all breakpoints in the line that the selected frame\n\
7861 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7863 c
= add_com ("break", class_breakpoint
, break_command
,
7864 concat ("Set breakpoint at specified line or function.\n\
7865 Argument may be line number, function name, or \"*\" and an address.\n\
7866 If line number is specified, break at start of code for that line.\n\
7867 If function is specified, break at start of code for that function.\n\
7868 If an address is specified, break at that exact address.\n",
7869 "With no arg, uses current execution address of selected stack frame.\n\
7870 This is useful for breaking on return to a stack frame.\n\
7872 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7874 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7875 set_cmd_completer (c
, location_completer
);
7877 add_com_alias ("b", "break", class_run
, 1);
7878 add_com_alias ("br", "break", class_run
, 1);
7879 add_com_alias ("bre", "break", class_run
, 1);
7880 add_com_alias ("brea", "break", class_run
, 1);
7884 add_com_alias ("ba", "break", class_breakpoint
, 1);
7885 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7890 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7891 "Break in function/address or break at a line in the current file.",
7892 &stoplist
, "stop ", 1, &cmdlist
);
7893 add_cmd ("in", class_breakpoint
, stopin_command
,
7894 "Break in function or address.\n", &stoplist
);
7895 add_cmd ("at", class_breakpoint
, stopat_command
,
7896 "Break at a line in the current file.\n", &stoplist
);
7897 add_com ("status", class_info
, breakpoints_info
,
7898 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7899 The \"Type\" column indicates one of:\n\
7900 \tbreakpoint - normal breakpoint\n\
7901 \twatchpoint - watchpoint\n\
7902 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7903 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7904 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7905 address and file/line number respectively.\n\n",
7906 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7907 are set to the address of the last breakpoint listed.\n\n\
7908 Convenience variable \"$bpnum\" contains the number of the last\n\
7909 breakpoint set.", NULL
));
7912 add_info ("breakpoints", breakpoints_info
,
7913 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7914 The \"Type\" column indicates one of:\n\
7915 \tbreakpoint - normal breakpoint\n\
7916 \twatchpoint - watchpoint\n\
7917 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7918 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7919 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7920 address and file/line number respectively.\n\n",
7921 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7922 are set to the address of the last breakpoint listed.\n\n\
7923 Convenience variable \"$bpnum\" contains the number of the last\n\
7924 breakpoint set.", NULL
));
7927 add_com ("lb", class_breakpoint
, breakpoints_info
,
7928 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7929 The \"Type\" column indicates one of:\n\
7930 \tbreakpoint - normal breakpoint\n\
7931 \twatchpoint - watchpoint\n\
7932 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7933 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7934 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7935 address and file/line number respectively.\n\n",
7936 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7937 are set to the address of the last breakpoint listed.\n\n\
7938 Convenience variable \"$bpnum\" contains the number of the last\n\
7939 breakpoint set.", NULL
));
7941 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7942 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7943 The \"Type\" column indicates one of:\n\
7944 \tbreakpoint - normal breakpoint\n\
7945 \twatchpoint - watchpoint\n\
7946 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7947 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7948 \tuntil - internal breakpoint used by the \"until\" command\n\
7949 \tfinish - internal breakpoint used by the \"finish\" command\n",
7950 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7951 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7952 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7953 address and file/line number respectively.\n\n",
7954 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7955 are set to the address of the last breakpoint listed.\n\n\
7956 Convenience variable \"$bpnum\" contains the number of the last\n\
7957 breakpoint set.", NULL
),
7958 &maintenanceinfolist
);
7960 add_com ("catch", class_breakpoint
, catch_command
,
7961 "Set catchpoints to catch events.\n\
7962 Raised signals may be caught:\n\
7963 \tcatch signal - all signals\n\
7964 \tcatch signal <signame> - a particular signal\n\
7965 Raised exceptions may be caught:\n\
7966 \tcatch throw - all exceptions, when thrown\n\
7967 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7968 \tcatch catch - all exceptions, when caught\n\
7969 \tcatch catch <exceptname> - a particular exception, when caught\n\
7970 Thread or process events may be caught:\n\
7971 \tcatch thread_start - any threads, just after creation\n\
7972 \tcatch thread_exit - any threads, just before expiration\n\
7973 \tcatch thread_join - any threads, just after joins\n\
7974 Process events may be caught:\n\
7975 \tcatch start - any processes, just after creation\n\
7976 \tcatch exit - any processes, just before expiration\n\
7977 \tcatch fork - calls to fork()\n\
7978 \tcatch vfork - calls to vfork()\n\
7979 \tcatch exec - calls to exec()\n\
7980 Dynamically-linked library events may be caught:\n\
7981 \tcatch load - loads of any library\n\
7982 \tcatch load <libname> - loads of a particular library\n\
7983 \tcatch unload - unloads of any library\n\
7984 \tcatch unload <libname> - unloads of a particular library\n\
7985 The act of your program's execution stopping may also be caught:\n\
7987 C++ exceptions may be caught:\n\
7988 \tcatch throw - all exceptions, when thrown\n\
7989 \tcatch catch - all exceptions, when caught\n\
7991 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7992 after a fork or vfork is caught.\n\n\
7993 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7995 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7996 "Set temporary catchpoints to catch events.\n\
7997 Args like \"catch\" command.\n\
7998 Like \"catch\" except the catchpoint is only temporary,\n\
7999 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
8000 by using \"enable delete\" on the catchpoint number.");
8002 c
= add_com ("watch", class_breakpoint
, watch_command
,
8003 "Set a watchpoint for an expression.\n\
8004 A watchpoint stops execution of your program whenever the value of\n\
8005 an expression changes.");
8006 set_cmd_completer (c
, location_completer
);
8008 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
8009 "Set a read watchpoint for an expression.\n\
8010 A watchpoint stops execution of your program whenever the value of\n\
8011 an expression is read.");
8012 set_cmd_completer (c
, location_completer
);
8014 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
8015 "Set a watchpoint for an expression.\n\
8016 A watchpoint stops execution of your program whenever the value of\n\
8017 an expression is either read or written.");
8018 set_cmd_completer (c
, location_completer
);
8020 add_info ("watchpoints", breakpoints_info
,
8021 "Synonym for ``info breakpoints''.");
8024 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
8025 (char *) &can_use_hw_watchpoints
,
8026 "Set debugger's willingness to use watchpoint hardware.\n\
8027 If zero, gdb will not use hardware for new watchpoints, even if\n\
8028 such is available. (However, any hardware watchpoints that were\n\
8029 created before setting this to nonzero, will continue to use watchpoint\n\
8032 add_show_from_set (c
, &showlist
);
8034 can_use_hw_watchpoints
= 1;