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, 2005
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"
54 #include "exceptions.h"
56 #include "gdb-events.h"
58 /* Prototypes for local functions. */
60 static void until_break_command_continuation (struct continuation_arg
*arg
);
62 static void catch_command_1 (char *, int, int);
64 static void enable_delete_command (char *, int);
66 static void enable_delete_breakpoint (struct breakpoint
*);
68 static void enable_once_command (char *, int);
70 static void enable_once_breakpoint (struct breakpoint
*);
72 static void disable_command (char *, int);
74 static void enable_command (char *, int);
76 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
78 static void ignore_command (char *, int);
80 static int breakpoint_re_set_one (void *);
82 static void clear_command (char *, int);
84 static void catch_command (char *, int);
86 static void watch_command (char *, int);
88 static int can_use_hardware_watchpoint (struct value
*);
90 static int break_command_1 (char *, int, int, struct breakpoint
*);
92 static void mention (struct breakpoint
*);
94 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
96 static void check_duplicates (struct breakpoint
*);
98 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
100 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
,
103 static void describe_other_breakpoints (CORE_ADDR
, asection
*);
105 static void breakpoints_info (char *, int);
107 static void breakpoint_1 (int, int);
109 static bpstat
bpstat_alloc (struct breakpoint
*, bpstat
);
111 static int breakpoint_cond_eval (void *);
113 static void cleanup_executing_breakpoints (void *);
115 static void commands_command (char *, int);
117 static void condition_command (char *, int);
119 static int get_number_trailer (char **, int);
121 void set_breakpoint_count (int);
130 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
132 static enum print_stop_action
print_it_typical (bpstat
);
134 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
138 enum exception_event_kind kind
;
141 args_for_catchpoint_enable
;
143 static int watchpoint_check (void *);
145 static int cover_target_enable_exception_callback (void *);
147 static void maintenance_info_breakpoints (char *, int);
149 static void create_longjmp_breakpoint (char *);
151 static void create_overlay_event_breakpoint (char *);
153 static int hw_breakpoint_used_count (void);
155 static int hw_watchpoint_used_count (enum bptype
, int *);
157 static void hbreak_command (char *, int);
159 static void thbreak_command (char *, int);
161 static void watch_command_1 (char *, int, int);
163 static void rwatch_command (char *, int);
165 static void awatch_command (char *, int);
167 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
169 static void solib_load_unload_1 (char *hookname
,
172 char *cond_string
, enum bptype bp_kind
);
174 static void create_fork_vfork_event_catchpoint (int tempflag
,
176 enum bptype bp_kind
);
178 static void stop_command (char *arg
, int from_tty
);
180 static void stopin_command (char *arg
, int from_tty
);
182 static void stopat_command (char *arg
, int from_tty
);
184 static char *ep_find_event_name_end (char *arg
);
186 static char *ep_parse_optional_if_clause (char **arg
);
188 static char *ep_parse_optional_filename (char **arg
);
190 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
191 enum exception_event_kind ex_event
,
192 struct symtab_and_line
*sal
);
194 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
195 char *arg
, int tempflag
, int from_tty
);
197 static void tcatch_command (char *arg
, int from_tty
);
199 static void ep_skip_leading_whitespace (char **s
);
201 /* Prototypes for exported functions. */
203 /* If FALSE, gdb will not use hardware support for watchpoints, even
204 if such is available. */
205 static int can_use_hw_watchpoints
;
207 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
208 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
209 for unrecognized breakpoint locations.
210 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
211 static enum auto_boolean pending_break_support
;
213 void _initialize_breakpoint (void);
215 extern int addressprint
; /* Print machine addresses? */
217 /* Are we executing breakpoint commands? */
218 static int executing_breakpoint_commands
;
220 /* Are overlay event breakpoints enabled? */
221 static int overlay_events_enabled
;
223 /* Walk the following statement or block through all breakpoints.
224 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
227 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
229 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
230 for (B = breakpoint_chain; \
231 B ? (TMP=B->next, 1): 0; \
234 /* Similar iterators for the low-level breakpoints. */
236 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->next)
238 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
239 for (B = bp_location_chain; \
240 B ? (TMP=B->next, 1): 0; \
243 /* True if breakpoint hit counts should be displayed in breakpoint info. */
245 int show_breakpoint_hit_counts
= 1;
247 /* Chains of all breakpoints defined. */
249 struct breakpoint
*breakpoint_chain
;
251 struct bp_location
*bp_location_chain
;
253 /* Number of last breakpoint made. */
255 int breakpoint_count
;
257 /* Pointer to current exception event record */
258 static struct exception_event_record
*current_exception_event
;
260 /* Indicator of whether exception catchpoints should be nuked between
261 runs of a program. */
262 int deprecated_exception_catchpoints_are_fragile
= 0;
264 /* Indicator of when exception catchpoints set-up should be
265 reinitialized -- e.g. when program is re-run. */
266 int deprecated_exception_support_initialized
= 0;
268 /* This function returns a pointer to the string representation of the
269 pathname of the dynamically-linked library that has just been
272 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
273 or undefined results are guaranteed.
275 This string's contents are only valid immediately after the
276 inferior has stopped in the dynamic linker hook, and becomes
277 invalid as soon as the inferior is continued. Clients should make
278 a copy of this string if they wish to continue the inferior and
279 then access the string. */
281 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
282 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
285 /* This function returns a pointer to the string representation of the
286 pathname of the dynamically-linked library that has just been
289 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
290 TRUE, or undefined results are guaranteed.
292 This string's contents are only valid immediately after the
293 inferior has stopped in the dynamic linker hook, and becomes
294 invalid as soon as the inferior is continued. Clients should make
295 a copy of this string if they wish to continue the inferior and
296 then access the string. */
298 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
299 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
302 /* This function is called by the "catch load" command. It allows the
303 debugger to be notified by the dynamic linker when a specified
304 library file (or any library file, if filename is NULL) is loaded. */
306 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
307 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
308 error (_("catch of library loads not yet implemented on this platform"))
311 /* This function is called by the "catch unload" command. It allows
312 the debugger to be notified by the dynamic linker when a specified
313 library file (or any library file, if filename is NULL) is
316 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
317 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid, tempflag, filename, cond_string) \
318 error (_("catch of library unloads not yet implemented on this platform"))
321 /* Return whether a breakpoint is an active enabled breakpoint. */
323 breakpoint_enabled (struct breakpoint
*b
)
325 return (b
->enable_state
== bp_enabled
&& !b
->pending
);
328 /* Set breakpoint count to NUM. */
331 set_breakpoint_count (int num
)
333 breakpoint_count
= num
;
334 set_internalvar (lookup_internalvar ("bpnum"),
335 value_from_longest (builtin_type_int
, (LONGEST
) num
));
338 /* Used in run_command to zero the hit count when a new run starts. */
341 clear_breakpoint_hit_counts (void)
343 struct breakpoint
*b
;
349 /* Default address, symtab and line to put a breakpoint at
350 for "break" command with no arg.
351 if default_breakpoint_valid is zero, the other three are
352 not valid, and "break" with no arg is an error.
354 This set by print_stack_frame, which calls set_default_breakpoint. */
356 int default_breakpoint_valid
;
357 CORE_ADDR default_breakpoint_address
;
358 struct symtab
*default_breakpoint_symtab
;
359 int default_breakpoint_line
;
361 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
362 Advance *PP after the string and any trailing whitespace.
364 Currently the string can either be a number or "$" followed by the name
365 of a convenience variable. Making it an expression wouldn't work well
366 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
368 TRAILER is a character which can be found after the number; most
369 commonly this is `-'. If you don't want a trailer, use \0. */
371 get_number_trailer (char **pp
, int trailer
)
373 int retval
= 0; /* default */
377 /* Empty line means refer to the last breakpoint. */
378 return breakpoint_count
;
381 /* Make a copy of the name, so we can null-terminate it
382 to pass to lookup_internalvar(). */
387 while (isalnum (*p
) || *p
== '_')
389 varname
= (char *) alloca (p
- start
+ 1);
390 strncpy (varname
, start
, p
- start
);
391 varname
[p
- start
] = '\0';
392 val
= value_of_internalvar (lookup_internalvar (varname
));
393 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_INT
)
394 retval
= (int) value_as_long (val
);
397 printf_filtered ("Convenience variable must have integer value.\n");
405 while (*p
>= '0' && *p
<= '9')
408 /* There is no number here. (e.g. "cond a == b"). */
410 /* Skip non-numeric token */
411 while (*p
&& !isspace((int) *p
))
413 /* Return zero, which caller must interpret as error. */
419 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
421 /* Trailing junk: return 0 and let caller print error msg. */
422 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
433 /* Like get_number_trailer, but don't allow a trailer. */
435 get_number (char **pp
)
437 return get_number_trailer (pp
, '\0');
440 /* Parse a number or a range.
441 * A number will be of the form handled by get_number.
442 * A range will be of the form <number1> - <number2>, and
443 * will represent all the integers between number1 and number2,
446 * While processing a range, this fuction is called iteratively;
447 * At each call it will return the next value in the range.
449 * At the beginning of parsing a range, the char pointer PP will
450 * be advanced past <number1> and left pointing at the '-' token.
451 * Subsequent calls will not advance the pointer until the range
452 * is completed. The call that completes the range will advance
453 * pointer PP past <number2>.
457 get_number_or_range (char **pp
)
459 static int last_retval
, end_value
;
460 static char *end_ptr
;
461 static int in_range
= 0;
465 /* Default case: pp is pointing either to a solo number,
466 or to the first number of a range. */
467 last_retval
= get_number_trailer (pp
, '-');
472 /* This is the start of a range (<number1> - <number2>).
473 Skip the '-', parse and remember the second number,
474 and also remember the end of the final token. */
478 while (isspace ((int) *end_ptr
))
479 end_ptr
++; /* skip white space */
480 end_value
= get_number (temp
);
481 if (end_value
< last_retval
)
483 error (_("inverted range"));
485 else if (end_value
== last_retval
)
487 /* degenerate range (number1 == number2). Advance the
488 token pointer so that the range will be treated as a
497 error (_("negative value"));
500 /* pp points to the '-' that betokens a range. All
501 number-parsing has already been done. Return the next
502 integer value (one greater than the saved previous value).
503 Do not advance the token pointer 'pp' until the end of range
506 if (++last_retval
== end_value
)
508 /* End of range reached; advance token pointer. */
518 /* condition N EXP -- set break condition of breakpoint N to EXP. */
521 condition_command (char *arg
, int from_tty
)
523 struct breakpoint
*b
;
528 error_no_arg ("breakpoint number");
531 bnum
= get_number (&p
);
533 error (_("Bad breakpoint argument: '%s'"), arg
);
536 if (b
->number
== bnum
)
543 if (b
->cond_string
!= NULL
)
544 xfree (b
->cond_string
);
549 b
->cond_string
= NULL
;
551 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
556 /* I don't know if it matters whether this is the string the user
557 typed in or the decompiled expression. */
558 b
->cond_string
= savestring (arg
, strlen (arg
));
561 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
563 error (_("Junk at end of expression"));
566 breakpoints_changed ();
567 breakpoint_modify_event (b
->number
);
571 error (_("No breakpoint number %d."), bnum
);
575 commands_command (char *arg
, int from_tty
)
577 struct breakpoint
*b
;
580 struct command_line
*l
;
582 /* If we allowed this, we would have problems with when to
583 free the storage, if we change the commands currently
586 if (executing_breakpoint_commands
)
587 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
590 bnum
= get_number (&p
);
593 error (_("Unexpected extra arguments following breakpoint number."));
596 if (b
->number
== bnum
)
598 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
600 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
601 l
= read_command_lines (tmpbuf
, from_tty
);
602 do_cleanups (cleanups
);
603 free_command_lines (&b
->commands
);
605 breakpoints_changed ();
606 breakpoint_modify_event (b
->number
);
609 error (_("No breakpoint number %d."), bnum
);
612 /* Like target_read_memory() but if breakpoints are inserted, return
613 the shadow contents instead of the breakpoints themselves.
615 Read "memory data" from whatever target or inferior we have.
616 Returns zero if successful, errno value if not. EIO is used
617 for address out of bounds. If breakpoints are inserted, returns
618 shadow contents, not the breakpoints themselves. From breakpoint.c. */
621 deprecated_read_memory_nobpt (CORE_ADDR memaddr
, char *myaddr
, unsigned len
)
624 struct bp_location
*b
;
625 CORE_ADDR bp_addr
= 0;
628 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
629 /* No breakpoints on this machine. */
630 return target_read_memory (memaddr
, myaddr
, len
);
634 if (b
->owner
->type
== bp_none
)
635 warning (_("reading through apparently deleted breakpoint #%d?"),
638 if (b
->loc_type
!= bp_loc_software_breakpoint
)
642 /* Addresses and length of the part of the breakpoint that
644 /* XXXX The m68k, sh and h8300 have different local and remote
645 breakpoint values. BREAKPOINT_FROM_PC still manages to
646 correctly determine the breakpoints memory address and size
647 for these targets. */
648 bp_addr
= b
->address
;
650 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
655 if (bp_addr
+ bp_size
<= memaddr
)
656 /* The breakpoint is entirely before the chunk of memory we
659 if (bp_addr
>= memaddr
+ len
)
660 /* The breakpoint is entirely after the chunk of memory we are
663 /* Copy the breakpoint from the shadow contents, and recurse for
664 the things before and after. */
666 /* Offset within shadow_contents. */
669 if (bp_addr
< memaddr
)
671 /* Only copy the second part of the breakpoint. */
672 bp_size
-= memaddr
- bp_addr
;
673 bptoffset
= memaddr
- bp_addr
;
677 if (bp_addr
+ bp_size
> memaddr
+ len
)
679 /* Only copy the first part of the breakpoint. */
680 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
683 memcpy (myaddr
+ bp_addr
- memaddr
,
684 b
->shadow_contents
+ bptoffset
, bp_size
);
686 if (bp_addr
> memaddr
)
688 /* Copy the section of memory before the breakpoint. */
689 status
= deprecated_read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
694 if (bp_addr
+ bp_size
< memaddr
+ len
)
696 /* Copy the section of memory after the breakpoint. */
697 status
= deprecated_read_memory_nobpt (bp_addr
+ bp_size
,
698 myaddr
+ bp_addr
+ bp_size
- memaddr
,
699 memaddr
+ len
- (bp_addr
+ bp_size
));
706 /* Nothing overlaps. Just call read_memory_noerr. */
707 return target_read_memory (memaddr
, myaddr
, len
);
711 /* A wrapper function for inserting catchpoints. */
713 insert_catchpoint (struct ui_out
*uo
, void *args
)
715 struct breakpoint
*b
= (struct breakpoint
*) args
;
721 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
724 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
727 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
730 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
735 /* Helper routine: free the value chain for a breakpoint (watchpoint). */
737 static void free_valchain (struct bp_location
*b
)
742 /* Free the saved value chain. We will construct a new one
743 the next time the watchpoint is inserted. */
744 for (v
= b
->owner
->val_chain
; v
; v
= n
)
749 b
->owner
->val_chain
= NULL
;
752 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
753 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
754 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
756 NOTE drow/2003-09-09: This routine could be broken down to an object-style
757 method for each breakpoint or catchpoint type. */
759 insert_bp_location (struct bp_location
*bpt
,
760 struct ui_file
*tmp_error_stream
,
761 int *disabled_breaks
, int *process_warning
,
762 int *hw_breakpoint_error
)
766 /* Permanent breakpoints cannot be inserted or removed. Disabled
767 breakpoints should not be inserted. */
768 if (!breakpoint_enabled (bpt
->owner
))
771 if (bpt
->inserted
|| bpt
->duplicate
)
774 if (bpt
->loc_type
== bp_loc_software_breakpoint
775 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
777 /* First check to see if we have to handle an overlay. */
778 if (overlay_debugging
== ovly_off
779 || bpt
->section
== NULL
780 || !(section_is_overlay (bpt
->section
)))
782 /* No overlay handling: just set the breakpoint. */
784 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
785 val
= target_insert_hw_breakpoint (bpt
->address
,
786 bpt
->shadow_contents
);
788 val
= target_insert_breakpoint (bpt
->address
,
789 bpt
->shadow_contents
);
793 /* This breakpoint is in an overlay section.
794 Shall we set a breakpoint at the LMA? */
795 if (!overlay_events_enabled
)
797 /* Yes -- overlay event support is not active,
798 so we must try to set a breakpoint at the LMA.
799 This will not work for a hardware breakpoint. */
800 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
801 warning (_("hardware breakpoint %d not supported in overlay!"),
805 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
807 /* Set a software (trap) breakpoint at the LMA. */
808 val
= target_insert_breakpoint (addr
, bpt
->shadow_contents
);
810 fprintf_unfiltered (tmp_error_stream
,
811 "Overlay breakpoint %d failed: in ROM?",
815 /* Shall we set a breakpoint at the VMA? */
816 if (section_is_mapped (bpt
->section
))
818 /* Yes. This overlay section is mapped into memory. */
819 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
820 val
= target_insert_hw_breakpoint (bpt
->address
,
821 bpt
->shadow_contents
);
823 val
= target_insert_breakpoint (bpt
->address
,
824 bpt
->shadow_contents
);
828 /* No. This breakpoint will not be inserted.
829 No error, but do not mark the bp as 'inserted'. */
836 /* Can't set the breakpoint. */
837 #if defined (DISABLE_UNSETTABLE_BREAK)
838 if (DISABLE_UNSETTABLE_BREAK (bpt
->address
))
840 /* See also: disable_breakpoints_in_shlibs. */
842 bpt
->owner
->enable_state
= bp_shlib_disabled
;
843 if (!*disabled_breaks
)
845 fprintf_unfiltered (tmp_error_stream
,
846 "Cannot insert breakpoint %d.\n",
848 fprintf_unfiltered (tmp_error_stream
,
849 "Temporarily disabling shared library breakpoints:\n");
851 *disabled_breaks
= 1;
852 fprintf_unfiltered (tmp_error_stream
,
853 "breakpoint #%d\n", bpt
->owner
->number
);
858 #ifdef ONE_PROCESS_WRITETEXT
859 *process_warning
= 1;
861 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
863 *hw_breakpoint_error
= 1;
864 fprintf_unfiltered (tmp_error_stream
,
865 "Cannot insert hardware breakpoint %d.\n",
870 fprintf_unfiltered (tmp_error_stream
,
871 "Cannot insert breakpoint %d.\n",
873 fprintf_filtered (tmp_error_stream
,
874 "Error accessing memory address ");
875 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
876 fprintf_filtered (tmp_error_stream
, ": %s.\n",
877 safe_strerror (val
));
888 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
889 /* NOTE drow/2003-09-08: This state only exists for removing
890 watchpoints. It's not clear that it's necessary... */
891 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
893 /* FIXME drow/2003-09-08: This code sets multiple hardware watchpoints
894 based on the expression. Ideally this should happen at a higher level,
895 and there should be one bp_location for each computed address we
896 must watch. As soon as a many-to-one mapping is available I'll
899 int within_current_scope
;
900 struct value
*mark
= value_mark ();
902 struct frame_id saved_frame_id
;
904 /* Save the current frame's ID so we can restore it after
905 evaluating the watchpoint expression on its own frame. */
906 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
907 took a frame parameter, so that we didn't have to change the
909 saved_frame_id
= get_frame_id (deprecated_selected_frame
);
911 /* Determine if the watchpoint is within scope. */
912 if (bpt
->owner
->exp_valid_block
== NULL
)
913 within_current_scope
= 1;
916 struct frame_info
*fi
;
917 fi
= frame_find_by_id (bpt
->owner
->watchpoint_frame
);
918 within_current_scope
= (fi
!= NULL
);
919 if (within_current_scope
)
923 if (within_current_scope
)
927 /* Evaluate the expression and cut the chain of values
928 produced off from the value chain.
930 Make sure the value returned isn't lazy; we use
931 laziness to determine what memory GDB actually needed
932 in order to compute the value of the expression. */
933 v
= evaluate_expression (bpt
->owner
->exp
);
935 value_release_to_mark (mark
);
937 bpt
->owner
->val_chain
= v
;
940 /* Look at each value on the value chain. */
941 for (; v
; v
= value_next (v
))
943 /* If it's a memory location, and GDB actually needed
944 its contents to evaluate the expression, then we
946 if (VALUE_LVAL (v
) == lval_memory
949 struct type
*vtype
= check_typedef (value_type (v
));
951 /* We only watch structs and arrays if user asked
952 for it explicitly, never if they just happen to
953 appear in the middle of some value chain. */
954 if (v
== bpt
->owner
->val_chain
955 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
956 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
961 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
962 len
= TYPE_LENGTH (value_type (v
));
964 if (bpt
->owner
->type
== bp_read_watchpoint
)
966 else if (bpt
->owner
->type
== bp_access_watchpoint
)
969 val
= target_insert_watchpoint (addr
, len
, type
);
972 /* Don't exit the loop, try to insert
973 every value on the value chain. That's
974 because we will be removing all the
975 watches below, and removing a
976 watchpoint we didn't insert could have
984 /* Failure to insert a watchpoint on any memory value in the
985 value chain brings us here. */
988 remove_breakpoint (bpt
, mark_uninserted
);
989 *hw_breakpoint_error
= 1;
990 fprintf_unfiltered (tmp_error_stream
,
991 "Could not insert hardware watchpoint %d.\n",
998 printf_filtered ("Hardware watchpoint %d deleted ", bpt
->owner
->number
);
999 printf_filtered ("because the program has left the block \n");
1000 printf_filtered ("in which its expression is valid.\n");
1001 if (bpt
->owner
->related_breakpoint
)
1002 bpt
->owner
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1003 bpt
->owner
->disposition
= disp_del_at_next_stop
;
1006 /* Restore the selected frame. */
1007 select_frame (frame_find_by_id (saved_frame_id
));
1012 else if (ep_is_exception_catchpoint (bpt
->owner
))
1014 /* FIXME drow/2003-09-09: This code sets both a catchpoint and a
1015 breakpoint. Once again, it would be better if this was represented
1016 as two bp_locations. */
1018 /* If we get here, we must have a callback mechanism for exception
1019 events -- with g++ style embedded label support, we insert
1020 ordinary breakpoints and not catchpoints. */
1021 val
= target_insert_breakpoint (bpt
->address
, bpt
->shadow_contents
);
1024 /* Couldn't set breakpoint for some reason */
1025 fprintf_unfiltered (tmp_error_stream
,
1026 "Cannot insert catchpoint %d; disabling it.\n",
1027 bpt
->owner
->number
);
1028 fprintf_filtered (tmp_error_stream
,
1029 "Error accessing memory address ");
1030 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
1031 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1032 safe_strerror (val
));
1033 bpt
->owner
->enable_state
= bp_disabled
;
1037 /* Bp set, now make sure callbacks are enabled */
1038 /* Format possible error msg */
1039 char *message
= xstrprintf ("Error inserting catchpoint %d:\n",
1040 bpt
->owner
->number
);
1041 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
1043 args_for_catchpoint_enable args
;
1044 args
.kind
= bpt
->owner
->type
== bp_catch_catch
?
1045 EX_EVENT_CATCH
: EX_EVENT_THROW
;
1047 val
= catch_errors (cover_target_enable_exception_callback
,
1048 &args
, message
, RETURN_MASK_ALL
);
1049 do_cleanups (cleanups
);
1050 if (val
!= 0 && val
!= -1)
1053 /* Check if something went wrong; val == 0 can be ignored */
1056 /* something went wrong */
1057 fprintf_unfiltered (tmp_error_stream
,
1058 "Cannot insert catchpoint %d; disabling it.\n",
1059 bpt
->owner
->number
);
1060 bpt
->owner
->enable_state
= bp_disabled
;
1067 else if (bpt
->owner
->type
== bp_catch_fork
1068 || bpt
->owner
->type
== bp_catch_vfork
1069 || bpt
->owner
->type
== bp_catch_exec
)
1071 struct exception e
= catch_exception (uiout
, insert_catchpoint
,
1072 bpt
->owner
, RETURN_MASK_ERROR
);
1073 exception_fprintf (gdb_stderr
, e
, "warning: inserting catchpoint %d: ",
1074 bpt
->owner
->number
);
1076 bpt
->owner
->enable_state
= bp_disabled
;
1080 /* We've already printed an error message if there was a problem
1081 inserting this catchpoint, and we've disabled the catchpoint,
1082 so just return success. */
1089 /* insert_breakpoints is used when starting or continuing the program.
1090 remove_breakpoints is used when the program stops.
1091 Both return zero if successful,
1092 or an `errno' value if could not write the inferior. */
1095 insert_breakpoints (void)
1097 struct bp_location
*b
, *temp
;
1098 int return_val
= 0; /* return success code. */
1100 int disabled_breaks
= 0;
1101 int hw_breakpoint_error
= 0;
1102 int process_warning
= 0;
1104 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1105 make_cleanup_ui_file_delete (tmp_error_stream
);
1107 /* Explicitly mark the warning -- this will only be printed if
1108 there was an error. */
1109 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1111 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1113 /* Permanent breakpoints cannot be inserted or removed. Disabled
1114 breakpoints should not be inserted. */
1115 if (!breakpoint_enabled (b
->owner
))
1118 /* FIXME drow/2003-10-07: This code should be pushed elsewhere when
1119 hardware watchpoints are split into multiple loc breakpoints. */
1120 if ((b
->loc_type
== bp_loc_hardware_watchpoint
1121 || b
->owner
->type
== bp_watchpoint
) && !b
->owner
->val
)
1124 val
= evaluate_expression (b
->owner
->exp
);
1125 release_value (val
);
1126 if (value_lazy (val
))
1127 value_fetch_lazy (val
);
1128 b
->owner
->val
= val
;
1131 val
= insert_bp_location (b
, tmp_error_stream
,
1132 &disabled_breaks
, &process_warning
,
1133 &hw_breakpoint_error
);
1140 /* If a hardware breakpoint or watchpoint was inserted, add a
1141 message about possibly exhausted resources. */
1142 if (hw_breakpoint_error
)
1144 fprintf_unfiltered (tmp_error_stream
,
1145 "Could not insert hardware breakpoints:\n\
1146 You may have requested too many hardware breakpoints/watchpoints.\n");
1148 #ifdef ONE_PROCESS_WRITETEXT
1149 if (process_warning
)
1150 fprintf_unfiltered (tmp_error_stream
,
1151 "The same program may be running in another process.");
1153 target_terminal_ours_for_output ();
1154 error_stream (tmp_error_stream
);
1160 remove_breakpoints (void)
1162 struct bp_location
*b
;
1165 ALL_BP_LOCATIONS (b
)
1169 val
= remove_breakpoint (b
, mark_uninserted
);
1178 remove_hw_watchpoints (void)
1180 struct bp_location
*b
;
1183 ALL_BP_LOCATIONS (b
)
1185 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1187 val
= remove_breakpoint (b
, mark_uninserted
);
1196 reattach_breakpoints (int pid
)
1198 struct bp_location
*b
;
1200 struct cleanup
*old_chain
= save_inferior_ptid ();
1202 /* Set inferior_ptid; remove_breakpoint uses this global. */
1203 inferior_ptid
= pid_to_ptid (pid
);
1204 ALL_BP_LOCATIONS (b
)
1208 remove_breakpoint (b
, mark_inserted
);
1209 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1210 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1212 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1213 /* FIXME drow/2003-10-07: This doesn't handle any other kinds of
1214 breakpoints. It's wrong for watchpoints, for example. */
1217 do_cleanups (old_chain
);
1222 do_cleanups (old_chain
);
1227 update_breakpoints_after_exec (void)
1229 struct breakpoint
*b
;
1230 struct breakpoint
*temp
;
1232 /* Doing this first prevents the badness of having delete_breakpoint()
1233 write a breakpoint's current "shadow contents" to lift the bp. That
1234 shadow is NOT valid after an exec()! */
1235 mark_breakpoints_out ();
1237 ALL_BREAKPOINTS_SAFE (b
, temp
)
1239 /* Solib breakpoints must be explicitly reset after an exec(). */
1240 if (b
->type
== bp_shlib_event
)
1242 delete_breakpoint (b
);
1246 /* Thread event breakpoints must be set anew after an exec(),
1247 as must overlay event breakpoints. */
1248 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1250 delete_breakpoint (b
);
1254 /* Step-resume breakpoints are meaningless after an exec(). */
1255 if (b
->type
== bp_step_resume
)
1257 delete_breakpoint (b
);
1261 /* Ditto the sigtramp handler breakpoints. */
1262 if (b
->type
== bp_through_sigtramp
)
1264 delete_breakpoint (b
);
1268 /* Ditto the exception-handling catchpoints. */
1269 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1271 delete_breakpoint (b
);
1275 /* Don't delete an exec catchpoint, because else the inferior
1276 won't stop when it ought!
1278 Similarly, we probably ought to keep vfork catchpoints, 'cause
1279 on this target, we may not be able to stop when the vfork is
1280 seen, but only when the subsequent exec is seen. (And because
1281 deleting fork catchpoints here but not vfork catchpoints will
1282 seem mysterious to users, keep those too.)
1284 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1285 target address field, if any, is sufficient to have it be reset
1286 automagically. Certainly on HP-UX that's true.
1288 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1289 valid code address on some platforms (like the mn10300
1290 simulators). We shouldn't assign any special interpretation to
1291 a breakpoint with a zero address. And in fact, GDB doesn't ---
1292 I can't see what that comment above is talking about. As far
1293 as I can tell, setting the address of a
1294 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1295 is meaningless, since those are implemented with HP-UX kernel
1296 hackery, not by storing breakpoint instructions somewhere. */
1297 if ((b
->type
== bp_catch_exec
) ||
1298 (b
->type
== bp_catch_vfork
) ||
1299 (b
->type
== bp_catch_fork
))
1301 b
->loc
->address
= (CORE_ADDR
) NULL
;
1305 /* bp_finish is a special case. The only way we ought to be able
1306 to see one of these when an exec() has happened, is if the user
1307 caught a vfork, and then said "finish". Ordinarily a finish just
1308 carries them to the call-site of the current callee, by setting
1309 a temporary bp there and resuming. But in this case, the finish
1310 will carry them entirely through the vfork & exec.
1312 We don't want to allow a bp_finish to remain inserted now. But
1313 we can't safely delete it, 'cause finish_command has a handle to
1314 the bp on a bpstat, and will later want to delete it. There's a
1315 chance (and I've seen it happen) that if we delete the bp_finish
1316 here, that its storage will get reused by the time finish_command
1317 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1318 We really must allow finish_command to delete a bp_finish.
1320 In the absense of a general solution for the "how do we know
1321 it's safe to delete something others may have handles to?"
1322 problem, what we'll do here is just uninsert the bp_finish, and
1323 let finish_command delete it.
1325 (We know the bp_finish is "doomed" in the sense that it's
1326 momentary, and will be deleted as soon as finish_command sees
1327 the inferior stopped. So it doesn't matter that the bp's
1328 address is probably bogus in the new a.out, unlike e.g., the
1329 solib breakpoints.) */
1331 if (b
->type
== bp_finish
)
1336 /* Without a symbolic address, we have little hope of the
1337 pre-exec() address meaning the same thing in the post-exec()
1339 if (b
->addr_string
== NULL
)
1341 delete_breakpoint (b
);
1345 /* If this breakpoint has survived the above battery of checks, then
1346 it must have a symbolic address. Be sure that it gets reevaluated
1347 to a target address, rather than reusing the old evaluation.
1349 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1350 for bp_catch_exec and friends, I'm pretty sure this is entirely
1351 unnecessary. A call to breakpoint_re_set_one always recomputes
1352 the breakpoint's address from scratch, or deletes it if it can't.
1353 So I think this assignment could be deleted without effect. */
1354 b
->loc
->address
= (CORE_ADDR
) NULL
;
1356 /* FIXME what about longjmp breakpoints? Re-create them here? */
1357 create_overlay_event_breakpoint ("_ovly_debug_event");
1361 detach_breakpoints (int pid
)
1363 struct bp_location
*b
;
1365 struct cleanup
*old_chain
= save_inferior_ptid ();
1367 if (pid
== PIDGET (inferior_ptid
))
1368 error (_("Cannot detach breakpoints of inferior_ptid"));
1370 /* Set inferior_ptid; remove_breakpoint uses this global. */
1371 inferior_ptid
= pid_to_ptid (pid
);
1372 ALL_BP_LOCATIONS (b
)
1376 val
= remove_breakpoint (b
, mark_inserted
);
1379 do_cleanups (old_chain
);
1384 do_cleanups (old_chain
);
1389 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1393 if (b
->owner
->enable_state
== bp_permanent
)
1394 /* Permanent breakpoints cannot be inserted or removed. */
1397 if (b
->owner
->type
== bp_none
)
1398 warning (_("attempted to remove apparently deleted breakpoint #%d?"),
1401 if (b
->loc_type
== bp_loc_software_breakpoint
1402 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1404 /* "Normal" instruction breakpoint: either the standard
1405 trap-instruction bp (bp_breakpoint), or a
1406 bp_hardware_breakpoint. */
1408 /* First check to see if we have to handle an overlay. */
1409 if (overlay_debugging
== ovly_off
1410 || b
->section
== NULL
1411 || !(section_is_overlay (b
->section
)))
1413 /* No overlay handling: just remove the breakpoint. */
1415 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1416 val
= target_remove_hw_breakpoint (b
->address
,
1417 b
->shadow_contents
);
1419 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1423 /* This breakpoint is in an overlay section.
1424 Did we set a breakpoint at the LMA? */
1425 if (!overlay_events_enabled
)
1427 /* Yes -- overlay event support is not active, so we
1428 should have set a breakpoint at the LMA. Remove it.
1430 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1432 /* Ignore any failures: if the LMA is in ROM, we will
1433 have already warned when we failed to insert it. */
1434 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1435 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1437 target_remove_breakpoint (addr
, b
->shadow_contents
);
1439 /* Did we set a breakpoint at the VMA?
1440 If so, we will have marked the breakpoint 'inserted'. */
1443 /* Yes -- remove it. Previously we did not bother to
1444 remove the breakpoint if the section had been
1445 unmapped, but let's not rely on that being safe. We
1446 don't know what the overlay manager might do. */
1447 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1448 val
= target_remove_hw_breakpoint (b
->address
,
1449 b
->shadow_contents
);
1451 val
= target_remove_breakpoint (b
->address
,
1452 b
->shadow_contents
);
1456 /* No -- not inserted, so no need to remove. No error. */
1462 b
->inserted
= (is
== mark_inserted
);
1464 else if (b
->loc_type
== bp_loc_hardware_watchpoint
1465 && breakpoint_enabled (b
->owner
)
1471 b
->inserted
= (is
== mark_inserted
);
1472 /* Walk down the saved value chain. */
1473 for (v
= b
->owner
->val_chain
; v
; v
= value_next (v
))
1475 /* For each memory reference remove the watchpoint
1477 if (VALUE_LVAL (v
) == lval_memory
1478 && ! value_lazy (v
))
1480 struct type
*vtype
= check_typedef (value_type (v
));
1482 if (v
== b
->owner
->val_chain
1483 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1484 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1489 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
1490 len
= TYPE_LENGTH (value_type (v
));
1492 if (b
->owner
->type
== bp_read_watchpoint
)
1494 else if (b
->owner
->type
== bp_access_watchpoint
)
1497 val
= target_remove_watchpoint (addr
, len
, type
);
1504 /* Failure to remove any of the hardware watchpoints comes here. */
1505 if ((is
== mark_uninserted
) && (b
->inserted
))
1506 warning (_("Could not remove hardware watchpoint %d."),
1509 else if ((b
->owner
->type
== bp_catch_fork
||
1510 b
->owner
->type
== bp_catch_vfork
||
1511 b
->owner
->type
== bp_catch_exec
)
1512 && breakpoint_enabled (b
->owner
)
1516 switch (b
->owner
->type
)
1519 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1521 case bp_catch_vfork
:
1522 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1525 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1528 warning (_("Internal error, %s line %d."), __FILE__
, __LINE__
);
1533 b
->inserted
= (is
== mark_inserted
);
1535 else if ((b
->owner
->type
== bp_catch_catch
||
1536 b
->owner
->type
== bp_catch_throw
)
1537 && breakpoint_enabled (b
->owner
)
1541 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1544 b
->inserted
= (is
== mark_inserted
);
1546 else if (ep_is_exception_catchpoint (b
->owner
)
1547 && b
->inserted
/* sometimes previous insert doesn't happen */
1548 && breakpoint_enabled (b
->owner
)
1552 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1556 b
->inserted
= (is
== mark_inserted
);
1562 /* Clear the "inserted" flag in all breakpoints. */
1565 mark_breakpoints_out (void)
1567 struct bp_location
*bpt
;
1569 ALL_BP_LOCATIONS (bpt
)
1573 /* Clear the "inserted" flag in all breakpoints and delete any
1574 breakpoints which should go away between runs of the program.
1576 Plus other such housekeeping that has to be done for breakpoints
1579 Note: this function gets called at the end of a run (by
1580 generic_mourn_inferior) and when a run begins (by
1581 init_wait_for_inferior). */
1586 breakpoint_init_inferior (enum inf_context context
)
1588 struct breakpoint
*b
, *temp
;
1589 struct bp_location
*bpt
;
1590 static int warning_needed
= 0;
1592 ALL_BP_LOCATIONS (bpt
)
1595 ALL_BREAKPOINTS_SAFE (b
, temp
)
1600 case bp_watchpoint_scope
:
1602 /* If the call dummy breakpoint is at the entry point it will
1603 cause problems when the inferior is rerun, so we better
1606 Also get rid of scope breakpoints. */
1607 delete_breakpoint (b
);
1611 case bp_hardware_watchpoint
:
1612 case bp_read_watchpoint
:
1613 case bp_access_watchpoint
:
1615 /* Likewise for watchpoints on local expressions. */
1616 if (b
->exp_valid_block
!= NULL
)
1617 delete_breakpoint (b
);
1618 if (context
== inf_starting
)
1620 /* Reset val field to force reread of starting value
1621 in insert_breakpoints. */
1623 value_free (b
->val
);
1628 /* Likewise for exception catchpoints in dynamic-linked
1629 executables where required */
1630 if (ep_is_exception_catchpoint (b
)
1631 && deprecated_exception_catchpoints_are_fragile
)
1634 delete_breakpoint (b
);
1640 if (deprecated_exception_catchpoints_are_fragile
)
1641 deprecated_exception_support_initialized
= 0;
1643 /* Don't issue the warning unless it's really needed... */
1644 if (warning_needed
&& (context
!= inf_exited
))
1646 warning (_("Exception catchpoints from last run were deleted.\n"
1647 "You must reinsert them explicitly."));
1652 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1653 exists at PC. It returns ordinary_breakpoint_here if it's an
1654 ordinary breakpoint, or permanent_breakpoint_here if it's a
1655 permanent breakpoint.
1656 - When continuing from a location with an ordinary breakpoint, we
1657 actually single step once before calling insert_breakpoints.
1658 - When continuing from a localion with a permanent breakpoint, we
1659 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1660 the target, to advance the PC past the breakpoint. */
1662 enum breakpoint_here
1663 breakpoint_here_p (CORE_ADDR pc
)
1665 struct bp_location
*bpt
;
1666 int any_breakpoint_here
= 0;
1668 ALL_BP_LOCATIONS (bpt
)
1670 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1671 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1674 if ((breakpoint_enabled (bpt
->owner
)
1675 || bpt
->owner
->enable_state
== bp_permanent
)
1676 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1678 if (overlay_debugging
1679 && section_is_overlay (bpt
->section
)
1680 && !section_is_mapped (bpt
->section
))
1681 continue; /* unmapped overlay -- can't be a match */
1682 else if (bpt
->owner
->enable_state
== bp_permanent
)
1683 return permanent_breakpoint_here
;
1685 any_breakpoint_here
= 1;
1689 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1693 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1694 but it only returns true if there is actually a breakpoint inserted
1698 breakpoint_inserted_here_p (CORE_ADDR pc
)
1700 struct bp_location
*bpt
;
1702 ALL_BP_LOCATIONS (bpt
)
1704 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1705 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1709 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1711 if (overlay_debugging
1712 && section_is_overlay (bpt
->section
)
1713 && !section_is_mapped (bpt
->section
))
1714 continue; /* unmapped overlay -- can't be a match */
1723 /* This function returns non-zero iff there is a software breakpoint
1727 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1729 struct bp_location
*bpt
;
1730 int any_breakpoint_here
= 0;
1732 ALL_BP_LOCATIONS (bpt
)
1734 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1737 if ((breakpoint_enabled (bpt
->owner
)
1738 || bpt
->owner
->enable_state
== bp_permanent
)
1740 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1742 if (overlay_debugging
1743 && section_is_overlay (bpt
->section
)
1744 && !section_is_mapped (bpt
->section
))
1745 continue; /* unmapped overlay -- can't be a match */
1754 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1755 PC is valid for process/thread PTID. */
1758 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1760 struct bp_location
*bpt
;
1763 thread
= pid_to_thread_id (ptid
);
1765 ALL_BP_LOCATIONS (bpt
)
1767 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1768 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1771 if ((breakpoint_enabled (bpt
->owner
)
1772 || bpt
->owner
->enable_state
== bp_permanent
)
1773 && bpt
->address
== pc
1774 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1776 if (overlay_debugging
1777 && section_is_overlay (bpt
->section
)
1778 && !section_is_mapped (bpt
->section
))
1779 continue; /* unmapped overlay -- can't be a match */
1789 /* bpstat stuff. External routines' interfaces are documented
1793 ep_is_catchpoint (struct breakpoint
*ep
)
1796 (ep
->type
== bp_catch_load
)
1797 || (ep
->type
== bp_catch_unload
)
1798 || (ep
->type
== bp_catch_fork
)
1799 || (ep
->type
== bp_catch_vfork
)
1800 || (ep
->type
== bp_catch_exec
)
1801 || (ep
->type
== bp_catch_catch
)
1802 || (ep
->type
== bp_catch_throw
);
1804 /* ??rehrauer: Add more kinds here, as are implemented... */
1808 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1811 (ep
->type
== bp_catch_load
)
1812 || (ep
->type
== bp_catch_unload
);
1816 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1819 (ep
->type
== bp_catch_catch
)
1820 || (ep
->type
== bp_catch_throw
);
1823 /* Clear a bpstat so that it says we are not at any breakpoint.
1824 Also free any storage that is part of a bpstat. */
1827 bpstat_clear (bpstat
*bsp
)
1838 if (p
->old_val
!= NULL
)
1839 value_free (p
->old_val
);
1840 free_command_lines (&p
->commands
);
1847 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1848 is part of the bpstat is copied as well. */
1851 bpstat_copy (bpstat bs
)
1855 bpstat retval
= NULL
;
1860 for (; bs
!= NULL
; bs
= bs
->next
)
1862 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1863 memcpy (tmp
, bs
, sizeof (*tmp
));
1864 if (bs
->commands
!= NULL
)
1865 tmp
->commands
= copy_command_lines (bs
->commands
);
1866 if (bs
->old_val
!= NULL
)
1867 tmp
->old_val
= value_copy (bs
->old_val
);
1870 /* This is the first thing in the chain. */
1880 /* Find the bpstat associated with this breakpoint */
1883 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1888 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1890 if (bsp
->breakpoint_at
== breakpoint
)
1896 /* Find a step_resume breakpoint associated with this bpstat.
1897 (If there are multiple step_resume bp's on the list, this function
1898 will arbitrarily pick one.)
1900 It is an error to use this function if BPSTAT doesn't contain a
1901 step_resume breakpoint.
1903 See wait_for_inferior's use of this function. */
1905 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1909 gdb_assert (bsp
!= NULL
);
1911 current_thread
= pid_to_thread_id (inferior_ptid
);
1913 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1915 if ((bsp
->breakpoint_at
!= NULL
) &&
1916 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1917 (bsp
->breakpoint_at
->thread
== current_thread
||
1918 bsp
->breakpoint_at
->thread
== -1))
1919 return bsp
->breakpoint_at
;
1922 internal_error (__FILE__
, __LINE__
, _("No step_resume breakpoint found."));
1926 /* Return the breakpoint number of the first breakpoint we are stopped
1927 at. *BSP upon return is a bpstat which points to the remaining
1928 breakpoints stopped at (but which is not guaranteed to be good for
1929 anything but further calls to bpstat_num).
1930 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1933 bpstat_num (bpstat
*bsp
)
1935 struct breakpoint
*b
;
1938 return 0; /* No more breakpoint values */
1941 b
= (*bsp
)->breakpoint_at
;
1942 *bsp
= (*bsp
)->next
;
1944 return -1; /* breakpoint that's been deleted since */
1946 return b
->number
; /* We have its number */
1950 /* Modify BS so that the actions will not be performed. */
1953 bpstat_clear_actions (bpstat bs
)
1955 for (; bs
!= NULL
; bs
= bs
->next
)
1957 free_command_lines (&bs
->commands
);
1958 if (bs
->old_val
!= NULL
)
1960 value_free (bs
->old_val
);
1966 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1968 cleanup_executing_breakpoints (void *ignore
)
1970 executing_breakpoint_commands
= 0;
1973 /* Execute all the commands associated with all the breakpoints at this
1974 location. Any of these commands could cause the process to proceed
1975 beyond this point, etc. We look out for such changes by checking
1976 the global "breakpoint_proceeded" after each command. */
1979 bpstat_do_actions (bpstat
*bsp
)
1982 struct cleanup
*old_chain
;
1984 /* Avoid endless recursion if a `source' command is contained
1986 if (executing_breakpoint_commands
)
1989 executing_breakpoint_commands
= 1;
1990 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
1993 /* Note that (as of this writing), our callers all appear to
1994 be passing us the address of global stop_bpstat. And, if
1995 our calls to execute_control_command cause the inferior to
1996 proceed, that global (and hence, *bsp) will change.
1998 We must be careful to not touch *bsp unless the inferior
1999 has not proceeded. */
2001 /* This pointer will iterate over the list of bpstat's. */
2004 breakpoint_proceeded
= 0;
2005 for (; bs
!= NULL
; bs
= bs
->next
)
2007 struct command_line
*cmd
;
2008 struct cleanup
*this_cmd_tree_chain
;
2010 /* Take ownership of the BSP's command tree, if it has one.
2012 The command tree could legitimately contain commands like
2013 'step' and 'next', which call clear_proceed_status, which
2014 frees stop_bpstat's command tree. To make sure this doesn't
2015 free the tree we're executing out from under us, we need to
2016 take ownership of the tree ourselves. Since a given bpstat's
2017 commands are only executed once, we don't need to copy it; we
2018 can clear the pointer in the bpstat, and make sure we free
2019 the tree when we're done. */
2022 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2026 execute_control_command (cmd
);
2028 if (breakpoint_proceeded
)
2034 /* We can free this command tree now. */
2035 do_cleanups (this_cmd_tree_chain
);
2037 if (breakpoint_proceeded
)
2038 /* The inferior is proceeded by the command; bomb out now.
2039 The bpstat chain has been blown away by wait_for_inferior.
2040 But since execution has stopped again, there is a new bpstat
2041 to look at, so start over. */
2044 do_cleanups (old_chain
);
2047 /* This is the normal print function for a bpstat. In the future,
2048 much of this logic could (should?) be moved to bpstat_stop_status,
2049 by having it set different print_it values.
2051 Current scheme: When we stop, bpstat_print() is called. It loops
2052 through the bpstat list of things causing this stop, calling the
2053 print_bp_stop_message function on each one. The behavior of the
2054 print_bp_stop_message function depends on the print_it field of
2055 bpstat. If such field so indicates, call this function here.
2057 Return values from this routine (ultimately used by bpstat_print()
2058 and normal_stop() to decide what to do):
2059 PRINT_NOTHING: Means we already printed all we needed to print,
2060 don't print anything else.
2061 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2062 that something to be followed by a location.
2063 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2064 that something to be followed by a location.
2065 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2068 static enum print_stop_action
2069 print_it_typical (bpstat bs
)
2071 struct cleanup
*old_chain
, *ui_out_chain
;
2072 struct ui_stream
*stb
;
2073 stb
= ui_out_stream_new (uiout
);
2074 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2075 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2076 which has since been deleted. */
2077 if (bs
->breakpoint_at
== NULL
)
2078 return PRINT_UNKNOWN
;
2080 switch (bs
->breakpoint_at
->type
)
2083 case bp_hardware_breakpoint
:
2084 if (bs
->breakpoint_at
->loc
->address
!= bs
->breakpoint_at
->loc
->requested_address
)
2085 breakpoint_adjustment_warning (bs
->breakpoint_at
->loc
->requested_address
,
2086 bs
->breakpoint_at
->loc
->address
,
2087 bs
->breakpoint_at
->number
, 1);
2088 annotate_breakpoint (bs
->breakpoint_at
->number
);
2089 ui_out_text (uiout
, "\nBreakpoint ");
2090 if (ui_out_is_mi_like_p (uiout
))
2091 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2092 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2093 ui_out_text (uiout
, ", ");
2094 return PRINT_SRC_AND_LOC
;
2097 case bp_shlib_event
:
2098 /* Did we stop because the user set the stop_on_solib_events
2099 variable? (If so, we report this as a generic, "Stopped due
2100 to shlib event" message.) */
2101 printf_filtered ("Stopped due to shared library event\n");
2102 return PRINT_NOTHING
;
2105 case bp_thread_event
:
2106 /* Not sure how we will get here.
2107 GDB should not stop for these breakpoints. */
2108 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2109 return PRINT_NOTHING
;
2112 case bp_overlay_event
:
2113 /* By analogy with the thread event, GDB should not stop for these. */
2114 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2115 return PRINT_NOTHING
;
2119 annotate_catchpoint (bs
->breakpoint_at
->number
);
2120 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2121 printf_filtered ("loaded");
2122 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2123 return PRINT_SRC_AND_LOC
;
2126 case bp_catch_unload
:
2127 annotate_catchpoint (bs
->breakpoint_at
->number
);
2128 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2129 printf_filtered ("unloaded");
2130 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2131 return PRINT_SRC_AND_LOC
;
2135 annotate_catchpoint (bs
->breakpoint_at
->number
);
2136 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2137 printf_filtered ("forked");
2138 printf_filtered (" process %d), ",
2139 bs
->breakpoint_at
->forked_inferior_pid
);
2140 return PRINT_SRC_AND_LOC
;
2143 case bp_catch_vfork
:
2144 annotate_catchpoint (bs
->breakpoint_at
->number
);
2145 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2146 printf_filtered ("vforked");
2147 printf_filtered (" process %d), ",
2148 bs
->breakpoint_at
->forked_inferior_pid
);
2149 return PRINT_SRC_AND_LOC
;
2153 annotate_catchpoint (bs
->breakpoint_at
->number
);
2154 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2155 bs
->breakpoint_at
->number
,
2156 bs
->breakpoint_at
->exec_pathname
);
2157 return PRINT_SRC_AND_LOC
;
2160 case bp_catch_catch
:
2161 if (current_exception_event
&&
2162 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2164 annotate_catchpoint (bs
->breakpoint_at
->number
);
2165 printf_filtered ("\nCatchpoint %d (exception caught), ",
2166 bs
->breakpoint_at
->number
);
2167 printf_filtered ("throw location ");
2168 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2169 printf_filtered ("%s:%d",
2170 CURRENT_EXCEPTION_THROW_FILE
,
2171 CURRENT_EXCEPTION_THROW_LINE
);
2173 printf_filtered ("unknown");
2175 printf_filtered (", catch location ");
2176 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2177 printf_filtered ("%s:%d",
2178 CURRENT_EXCEPTION_CATCH_FILE
,
2179 CURRENT_EXCEPTION_CATCH_LINE
);
2181 printf_filtered ("unknown");
2183 printf_filtered ("\n");
2184 /* don't bother to print location frame info */
2185 return PRINT_SRC_ONLY
;
2189 /* really throw, some other bpstat will handle it */
2190 return PRINT_UNKNOWN
;
2194 case bp_catch_throw
:
2195 if (current_exception_event
&&
2196 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2198 annotate_catchpoint (bs
->breakpoint_at
->number
);
2199 printf_filtered ("\nCatchpoint %d (exception thrown), ",
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 catch, some other bpstat will handle it */
2224 return PRINT_UNKNOWN
;
2229 case bp_hardware_watchpoint
:
2230 if (bs
->old_val
!= NULL
)
2232 annotate_watchpoint (bs
->breakpoint_at
->number
);
2233 if (ui_out_is_mi_like_p (uiout
))
2234 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2235 mention (bs
->breakpoint_at
);
2236 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2237 ui_out_text (uiout
, "\nOld value = ");
2238 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2239 ui_out_field_stream (uiout
, "old", stb
);
2240 ui_out_text (uiout
, "\nNew value = ");
2241 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2242 ui_out_field_stream (uiout
, "new", stb
);
2243 do_cleanups (ui_out_chain
);
2244 ui_out_text (uiout
, "\n");
2245 value_free (bs
->old_val
);
2248 /* More than one watchpoint may have been triggered. */
2249 return PRINT_UNKNOWN
;
2252 case bp_read_watchpoint
:
2253 if (ui_out_is_mi_like_p (uiout
))
2254 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2255 mention (bs
->breakpoint_at
);
2256 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2257 ui_out_text (uiout
, "\nValue = ");
2258 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2259 ui_out_field_stream (uiout
, "value", stb
);
2260 do_cleanups (ui_out_chain
);
2261 ui_out_text (uiout
, "\n");
2262 return PRINT_UNKNOWN
;
2265 case bp_access_watchpoint
:
2266 if (bs
->old_val
!= NULL
)
2268 annotate_watchpoint (bs
->breakpoint_at
->number
);
2269 if (ui_out_is_mi_like_p (uiout
))
2270 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2271 mention (bs
->breakpoint_at
);
2272 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2273 ui_out_text (uiout
, "\nOld value = ");
2274 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2275 ui_out_field_stream (uiout
, "old", stb
);
2276 value_free (bs
->old_val
);
2278 ui_out_text (uiout
, "\nNew value = ");
2282 mention (bs
->breakpoint_at
);
2283 if (ui_out_is_mi_like_p (uiout
))
2284 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2285 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2286 ui_out_text (uiout
, "\nValue = ");
2288 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2289 ui_out_field_stream (uiout
, "new", stb
);
2290 do_cleanups (ui_out_chain
);
2291 ui_out_text (uiout
, "\n");
2292 return PRINT_UNKNOWN
;
2295 /* Fall through, we don't deal with these types of breakpoints
2299 if (ui_out_is_mi_like_p (uiout
))
2300 ui_out_field_string (uiout
, "reason", "function-finished");
2301 return PRINT_UNKNOWN
;
2305 if (ui_out_is_mi_like_p (uiout
))
2306 ui_out_field_string (uiout
, "reason", "location-reached");
2307 return PRINT_UNKNOWN
;
2312 case bp_longjmp_resume
:
2313 case bp_step_resume
:
2314 case bp_through_sigtramp
:
2315 case bp_watchpoint_scope
:
2318 return PRINT_UNKNOWN
;
2322 /* Generic routine for printing messages indicating why we
2323 stopped. The behavior of this function depends on the value
2324 'print_it' in the bpstat structure. Under some circumstances we
2325 may decide not to print anything here and delegate the task to
2328 static enum print_stop_action
2329 print_bp_stop_message (bpstat bs
)
2331 switch (bs
->print_it
)
2334 /* Nothing should be printed for this bpstat entry. */
2335 return PRINT_UNKNOWN
;
2339 /* We still want to print the frame, but we already printed the
2340 relevant messages. */
2341 return PRINT_SRC_AND_LOC
;
2344 case print_it_normal
:
2345 /* Normal case. Call the breakpoint's print_it method, or
2346 print_it_typical. */
2347 if (bs
->breakpoint_at
!= NULL
&& bs
->breakpoint_at
->ops
!= NULL
2348 && bs
->breakpoint_at
->ops
->print_it
!= NULL
)
2349 return bs
->breakpoint_at
->ops
->print_it (bs
->breakpoint_at
);
2351 return print_it_typical (bs
);
2355 internal_error (__FILE__
, __LINE__
,
2356 "print_bp_stop_message: unrecognized enum value");
2361 /* Print a message indicating what happened. This is called from
2362 normal_stop(). The input to this routine is the head of the bpstat
2363 list - a list of the eventpoints that caused this stop. This
2364 routine calls the generic print routine for printing a message
2365 about reasons for stopping. This will print (for example) the
2366 "Breakpoint n," part of the output. The return value of this
2369 PRINT_UNKNOWN: Means we printed nothing
2370 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2371 code to print the location. An example is
2372 "Breakpoint 1, " which should be followed by
2374 PRINT_SRC_ONLY: Means we printed something, but there is no need
2375 to also print the location part of the message.
2376 An example is the catch/throw messages, which
2377 don't require a location appended to the end.
2378 PRINT_NOTHING: We have done some printing and we don't need any
2379 further info to be printed.*/
2381 enum print_stop_action
2382 bpstat_print (bpstat bs
)
2386 /* Maybe another breakpoint in the chain caused us to stop.
2387 (Currently all watchpoints go on the bpstat whether hit or not.
2388 That probably could (should) be changed, provided care is taken
2389 with respect to bpstat_explains_signal). */
2390 for (; bs
; bs
= bs
->next
)
2392 val
= print_bp_stop_message (bs
);
2393 if (val
== PRINT_SRC_ONLY
2394 || val
== PRINT_SRC_AND_LOC
2395 || val
== PRINT_NOTHING
)
2399 /* We reached the end of the chain, or we got a null BS to start
2400 with and nothing was printed. */
2401 return PRINT_UNKNOWN
;
2404 /* Evaluate the expression EXP and return 1 if value is zero.
2405 This is used inside a catch_errors to evaluate the breakpoint condition.
2406 The argument is a "struct expression *" that has been cast to char * to
2407 make it pass through catch_errors. */
2410 breakpoint_cond_eval (void *exp
)
2412 struct value
*mark
= value_mark ();
2413 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2414 value_free_to_mark (mark
);
2418 /* Allocate a new bpstat and chain it to the current one. */
2421 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2425 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2427 bs
->breakpoint_at
= b
;
2428 /* If the condition is false, etc., don't do the commands. */
2429 bs
->commands
= NULL
;
2431 bs
->print_it
= print_it_normal
;
2435 /* Possible return values for watchpoint_check (this can't be an enum
2436 because of check_errors). */
2437 /* The watchpoint has been deleted. */
2438 #define WP_DELETED 1
2439 /* The value has changed. */
2440 #define WP_VALUE_CHANGED 2
2441 /* The value has not changed. */
2442 #define WP_VALUE_NOT_CHANGED 3
2444 #define BP_TEMPFLAG 1
2445 #define BP_HARDWAREFLAG 2
2447 /* Check watchpoint condition. */
2450 watchpoint_check (void *p
)
2452 bpstat bs
= (bpstat
) p
;
2453 struct breakpoint
*b
;
2454 struct frame_info
*fr
;
2455 int within_current_scope
;
2457 b
= bs
->breakpoint_at
;
2459 if (b
->exp_valid_block
== NULL
)
2460 within_current_scope
= 1;
2463 /* There is no current frame at this moment. If we're going to have
2464 any chance of handling watchpoints on local variables, we'll need
2465 the frame chain (so we can determine if we're in scope). */
2466 reinit_frame_cache ();
2467 fr
= frame_find_by_id (b
->watchpoint_frame
);
2468 within_current_scope
= (fr
!= NULL
);
2469 /* in_function_epilogue_p() returns a non-zero value if we're still
2470 in the function but the stack frame has already been invalidated.
2471 Since we can't rely on the values of local variables after the
2472 stack has been destroyed, we are treating the watchpoint in that
2473 state as `not changed' without further checking.
2475 vinschen/2003-09-04: The former implementation left out the case
2476 that the watchpoint frame couldn't be found by frame_find_by_id()
2477 because the current PC is currently in an epilogue. Calling
2478 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2479 if ((!within_current_scope
|| fr
== get_current_frame ())
2480 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2481 return WP_VALUE_NOT_CHANGED
;
2482 if (fr
&& within_current_scope
)
2483 /* If we end up stopping, the current frame will get selected
2484 in normal_stop. So this call to select_frame won't affect
2489 if (within_current_scope
)
2491 /* We use value_{,free_to_}mark because it could be a
2492 *long* time before we return to the command level and
2493 call free_all_values. We can't call free_all_values because
2494 we might be in the middle of evaluating a function call. */
2496 struct value
*mark
= value_mark ();
2497 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2498 if (!value_equal (b
->val
, new_val
))
2500 release_value (new_val
);
2501 value_free_to_mark (mark
);
2502 bs
->old_val
= b
->val
;
2504 /* We will stop here */
2505 return WP_VALUE_CHANGED
;
2509 /* Nothing changed, don't do anything. */
2510 value_free_to_mark (mark
);
2511 /* We won't stop here */
2512 return WP_VALUE_NOT_CHANGED
;
2517 /* This seems like the only logical thing to do because
2518 if we temporarily ignored the watchpoint, then when
2519 we reenter the block in which it is valid it contains
2520 garbage (in the case of a function, it may have two
2521 garbage values, one before and one after the prologue).
2522 So we can't even detect the first assignment to it and
2523 watch after that (since the garbage may or may not equal
2524 the first value assigned). */
2525 /* We print all the stop information in print_it_typical(), but
2526 in this case, by the time we call print_it_typical() this bp
2527 will be deleted already. So we have no choice but print the
2528 information here. */
2529 if (ui_out_is_mi_like_p (uiout
))
2530 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2531 ui_out_text (uiout
, "\nWatchpoint ");
2532 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2533 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2534 which its expression is valid.\n");
2536 if (b
->related_breakpoint
)
2537 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2538 b
->disposition
= disp_del_at_next_stop
;
2544 /* Get a bpstat associated with having just stopped at address
2545 BP_ADDR in thread PTID. STOPPED_BY_WATCHPOINT is 1 if the
2546 target thinks we stopped due to a hardware watchpoint, 0 if we
2547 know we did not trigger a hardware watchpoint, and -1 if we do not know. */
2549 /* Determine whether we stopped at a breakpoint, etc, or whether we
2550 don't understand this stop. Result is a chain of bpstat's such that:
2552 if we don't understand the stop, the result is a null pointer.
2554 if we understand why we stopped, the result is not null.
2556 Each element of the chain refers to a particular breakpoint or
2557 watchpoint at which we have stopped. (We may have stopped for
2558 several reasons concurrently.)
2560 Each element of the chain has valid next, breakpoint_at,
2561 commands, FIXME??? fields. */
2564 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
, int stopped_by_watchpoint
)
2566 struct breakpoint
*b
, *temp
;
2567 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2568 int real_breakpoint
= 0;
2569 /* Root of the chain of bpstat's */
2570 struct bpstats root_bs
[1];
2571 /* Pointer to the last thing in the chain currently. */
2572 bpstat bs
= root_bs
;
2573 int thread_id
= pid_to_thread_id (ptid
);
2575 ALL_BREAKPOINTS_SAFE (b
, temp
)
2577 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
2580 if (b
->type
!= bp_watchpoint
2581 && b
->type
!= bp_hardware_watchpoint
2582 && b
->type
!= bp_read_watchpoint
2583 && b
->type
!= bp_access_watchpoint
2584 && b
->type
!= bp_hardware_breakpoint
2585 && b
->type
!= bp_catch_fork
2586 && b
->type
!= bp_catch_vfork
2587 && b
->type
!= bp_catch_exec
2588 && b
->type
!= bp_catch_catch
2589 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2591 if (b
->loc
->address
!= bp_addr
) /* address doesn't match */
2593 if (overlay_debugging
/* unmapped overlay section */
2594 && section_is_overlay (b
->loc
->section
)
2595 && !section_is_mapped (b
->loc
->section
))
2599 /* Continuable hardware watchpoints are treated as non-existent if the
2600 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2601 some data address). Otherwise gdb won't stop on a break instruction
2602 in the code (not from a breakpoint) when a hardware watchpoint has
2605 if ((b
->type
== bp_hardware_watchpoint
2606 || b
->type
== bp_read_watchpoint
2607 || b
->type
== bp_access_watchpoint
)
2608 && !stopped_by_watchpoint
)
2611 if (b
->type
== bp_hardware_breakpoint
)
2613 if (b
->loc
->address
!= bp_addr
)
2615 if (overlay_debugging
/* unmapped overlay section */
2616 && section_is_overlay (b
->loc
->section
)
2617 && !section_is_mapped (b
->loc
->section
))
2621 /* Is this a catchpoint of a load or unload? If so, did we
2622 get a load or unload of the specified library? If not,
2624 if ((b
->type
== bp_catch_load
)
2625 #if defined(SOLIB_HAVE_LOAD_EVENT)
2626 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2627 || ((b
->dll_pathname
!= NULL
)
2628 && (strcmp (b
->dll_pathname
,
2629 SOLIB_LOADED_LIBRARY_PATHNAME (
2630 PIDGET (inferior_ptid
)))
2636 if ((b
->type
== bp_catch_unload
)
2637 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2638 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2639 || ((b
->dll_pathname
!= NULL
)
2640 && (strcmp (b
->dll_pathname
,
2641 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2642 PIDGET (inferior_ptid
)))
2648 if ((b
->type
== bp_catch_fork
)
2649 && !inferior_has_forked (PIDGET (inferior_ptid
),
2650 &b
->forked_inferior_pid
))
2653 if ((b
->type
== bp_catch_vfork
)
2654 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2655 &b
->forked_inferior_pid
))
2658 if ((b
->type
== bp_catch_exec
)
2659 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2662 if (ep_is_exception_catchpoint (b
) &&
2663 !(current_exception_event
= target_get_current_exception_event ()))
2666 /* Come here if it's a watchpoint, or if the break address matches */
2668 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2670 /* Watchpoints may change this, if not found to have triggered. */
2674 if (b
->type
== bp_watchpoint
||
2675 b
->type
== bp_hardware_watchpoint
)
2677 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2679 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2680 int e
= catch_errors (watchpoint_check
, bs
, message
,
2682 do_cleanups (cleanups
);
2686 /* We've already printed what needs to be printed. */
2687 /* Actually this is superfluous, because by the time we
2688 call print_it_typical() the wp will be already deleted,
2689 and the function will return immediately. */
2690 bs
->print_it
= print_it_done
;
2693 case WP_VALUE_CHANGED
:
2697 case WP_VALUE_NOT_CHANGED
:
2699 bs
->print_it
= print_it_noop
;
2706 /* Error from catch_errors. */
2707 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2708 if (b
->related_breakpoint
)
2709 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2710 b
->disposition
= disp_del_at_next_stop
;
2711 /* We've already printed what needs to be printed. */
2712 bs
->print_it
= print_it_done
;
2718 else if (b
->type
== bp_read_watchpoint
||
2719 b
->type
== bp_access_watchpoint
)
2725 if (!target_stopped_data_address (¤t_target
, &addr
))
2727 for (v
= b
->val_chain
; v
; v
= value_next (v
))
2729 if (VALUE_LVAL (v
) == lval_memory
2730 && ! value_lazy (v
))
2732 struct type
*vtype
= check_typedef (value_type (v
));
2734 if (v
== b
->val_chain
2735 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2736 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2740 vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
2741 /* Exact match not required. Within range is
2743 if (addr
>= vaddr
&&
2744 addr
< vaddr
+ TYPE_LENGTH (value_type (v
)))
2751 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2753 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2754 int e
= catch_errors (watchpoint_check
, bs
, message
,
2756 do_cleanups (cleanups
);
2760 /* We've already printed what needs to be printed. */
2761 bs
->print_it
= print_it_done
;
2764 case WP_VALUE_CHANGED
:
2765 if (b
->type
== bp_read_watchpoint
)
2767 /* Don't stop: read watchpoints shouldn't fire if
2768 the value has changed. This is for targets
2769 which cannot set read-only watchpoints. */
2770 bs
->print_it
= print_it_noop
;
2776 case WP_VALUE_NOT_CHANGED
:
2783 /* Error from catch_errors. */
2784 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2785 if (b
->related_breakpoint
)
2786 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2787 b
->disposition
= disp_del_at_next_stop
;
2788 /* We've already printed what needs to be printed. */
2789 bs
->print_it
= print_it_done
;
2793 else /* found == 0 */
2795 /* This is a case where some watchpoint(s) triggered,
2796 but not at the address of this watchpoint (FOUND
2797 was left zero). So don't print anything for this
2799 bs
->print_it
= print_it_noop
;
2806 /* By definition, an encountered breakpoint is a triggered
2810 real_breakpoint
= 1;
2813 if (frame_id_p (b
->frame_id
)
2814 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2818 int value_is_zero
= 0;
2822 /* Need to select the frame, with all that implies
2823 so that the conditions will have the right context. */
2824 select_frame (get_current_frame ());
2826 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2827 "Error in testing breakpoint condition:\n",
2829 /* FIXME-someday, should give breakpoint # */
2832 if (b
->cond
&& value_is_zero
)
2835 /* Don't consider this a hit. */
2838 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2841 /* Don't consider this a hit. */
2844 else if (b
->ignore_count
> 0)
2847 annotate_ignore_count_change ();
2852 /* We will stop here */
2853 if (b
->disposition
== disp_disable
)
2854 b
->enable_state
= bp_disabled
;
2857 bs
->commands
= b
->commands
;
2859 (strcmp ("silent", bs
->commands
->line
) == 0
2860 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
2862 bs
->commands
= bs
->commands
->next
;
2865 bs
->commands
= copy_command_lines (bs
->commands
);
2868 /* Print nothing for this entry if we dont stop or if we dont print. */
2869 if (bs
->stop
== 0 || bs
->print
== 0)
2870 bs
->print_it
= print_it_noop
;
2873 bs
->next
= NULL
; /* Terminate the chain */
2874 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2876 /* The value of a hardware watchpoint hasn't changed, but the
2877 intermediate memory locations we are watching may have. */
2878 if (bs
&& !bs
->stop
&&
2879 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2880 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2881 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2883 remove_breakpoints ();
2884 insert_breakpoints ();
2889 /* Tell what to do about this bpstat. */
2891 bpstat_what (bpstat bs
)
2893 /* Classify each bpstat as one of the following. */
2896 /* This bpstat element has no effect on the main_action. */
2899 /* There was a watchpoint, stop but don't print. */
2902 /* There was a watchpoint, stop and print. */
2905 /* There was a breakpoint but we're not stopping. */
2908 /* There was a breakpoint, stop but don't print. */
2911 /* There was a breakpoint, stop and print. */
2914 /* We hit the longjmp breakpoint. */
2917 /* We hit the longjmp_resume breakpoint. */
2920 /* We hit the step_resume breakpoint. */
2923 /* We hit the through_sigtramp breakpoint. */
2926 /* We hit the shared library event breakpoint. */
2929 /* We caught a shared library event. */
2932 /* This is just used to count how many enums there are. */
2936 /* Here is the table which drives this routine. So that we can
2937 format it pretty, we define some abbreviations for the
2938 enum bpstat_what codes. */
2939 #define kc BPSTAT_WHAT_KEEP_CHECKING
2940 #define ss BPSTAT_WHAT_STOP_SILENT
2941 #define sn BPSTAT_WHAT_STOP_NOISY
2942 #define sgl BPSTAT_WHAT_SINGLE
2943 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2944 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2945 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2946 #define sr BPSTAT_WHAT_STEP_RESUME
2947 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2948 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2949 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2951 /* "Can't happen." Might want to print an error message.
2952 abort() is not out of the question, but chances are GDB is just
2953 a bit confused, not unusable. */
2954 #define err BPSTAT_WHAT_STOP_NOISY
2956 /* Given an old action and a class, come up with a new action. */
2957 /* One interesting property of this table is that wp_silent is the same
2958 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2959 after stopping, the check for whether to step over a breakpoint
2960 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2961 reference to how we stopped. We retain separate wp_silent and
2962 bp_silent codes in case we want to change that someday.
2964 Another possibly interesting property of this table is that
2965 there's a partial ordering, priority-like, of the actions. Once
2966 you've decided that some action is appropriate, you'll never go
2967 back and decide something of a lower priority is better. The
2970 kc < clr sgl shl shlr slr sn sr ss ts
2971 sgl < clrs shl shlr slr sn sr ss ts
2972 slr < err shl shlr sn sr ss ts
2973 clr < clrs err shl shlr sn sr ss ts
2974 clrs < err shl shlr sn sr ss ts
2975 ss < shl shlr sn sr ts
2982 What I think this means is that we don't need a damned table
2983 here. If you just put the rows and columns in the right order,
2984 it'd look awfully regular. We could simply walk the bpstat list
2985 and choose the highest priority action we find, with a little
2986 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2987 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2988 is messy anyway). */
2990 /* step_resume entries: a step resume breakpoint overrides another
2991 breakpoint of signal handling (see comment in wait_for_inferior
2992 at where we set the step_resume breakpoint). */
2993 /* We handle the through_sigtramp_breakpoint the same way; having both
2994 one of those and a step_resume_breakpoint is probably very rare (?). */
2996 static const enum bpstat_what_main_action
2997 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3000 /* kc ss sn sgl slr clr clrs sr ts shl shlr
3003 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
3005 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3007 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3009 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
3011 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3013 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3015 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
3017 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
3019 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
3021 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
3023 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
3025 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
3040 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3041 struct bpstat_what retval
;
3043 retval
.call_dummy
= 0;
3044 for (; bs
!= NULL
; bs
= bs
->next
)
3046 enum class bs_class
= no_effect
;
3047 if (bs
->breakpoint_at
== NULL
)
3048 /* I suspect this can happen if it was a momentary breakpoint
3049 which has since been deleted. */
3051 switch (bs
->breakpoint_at
->type
)
3057 case bp_hardware_breakpoint
:
3063 bs_class
= bp_noisy
;
3065 bs_class
= bp_silent
;
3068 bs_class
= bp_nostop
;
3071 case bp_hardware_watchpoint
:
3072 case bp_read_watchpoint
:
3073 case bp_access_watchpoint
:
3077 bs_class
= wp_noisy
;
3079 bs_class
= wp_silent
;
3082 /* There was a watchpoint, but we're not stopping.
3083 This requires no further action. */
3084 bs_class
= no_effect
;
3087 bs_class
= long_jump
;
3089 case bp_longjmp_resume
:
3090 bs_class
= long_resume
;
3092 case bp_step_resume
:
3095 bs_class
= step_resume
;
3098 /* It is for the wrong frame. */
3099 bs_class
= bp_nostop
;
3101 case bp_through_sigtramp
:
3102 bs_class
= through_sig
;
3104 case bp_watchpoint_scope
:
3105 bs_class
= bp_nostop
;
3107 case bp_shlib_event
:
3108 bs_class
= shlib_event
;
3110 case bp_thread_event
:
3111 case bp_overlay_event
:
3112 bs_class
= bp_nostop
;
3115 case bp_catch_unload
:
3116 /* Only if this catchpoint triggered should we cause the
3117 step-out-of-dld behaviour. Otherwise, we ignore this
3120 bs_class
= catch_shlib_event
;
3122 bs_class
= no_effect
;
3125 case bp_catch_vfork
:
3130 bs_class
= bp_noisy
;
3132 bs_class
= bp_silent
;
3135 /* There was a catchpoint, but we're not stopping.
3136 This requires no further action. */
3137 bs_class
= no_effect
;
3139 case bp_catch_catch
:
3140 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3141 bs_class
= bp_nostop
;
3143 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3145 case bp_catch_throw
:
3146 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3147 bs_class
= bp_nostop
;
3149 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3152 /* Make sure the action is stop (silent or noisy),
3153 so infrun.c pops the dummy frame. */
3154 bs_class
= bp_silent
;
3155 retval
.call_dummy
= 1;
3158 current_action
= table
[(int) bs_class
][(int) current_action
];
3160 retval
.main_action
= current_action
;
3164 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3165 without hardware support). This isn't related to a specific bpstat,
3166 just to things like whether watchpoints are set. */
3169 bpstat_should_step (void)
3171 struct breakpoint
*b
;
3173 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3178 /* Nonzero if there are enabled hardware watchpoints. */
3180 bpstat_have_active_hw_watchpoints (void)
3182 struct bp_location
*bpt
;
3183 ALL_BP_LOCATIONS (bpt
)
3184 if (breakpoint_enabled (bpt
->owner
)
3186 && bpt
->loc_type
== bp_loc_hardware_watchpoint
)
3192 /* Given a bpstat that records zero or more triggered eventpoints, this
3193 function returns another bpstat which contains only the catchpoints
3194 on that first list, if any. */
3196 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3198 struct bpstats root_bs
[1];
3199 bpstat bs
= root_bs
;
3200 struct breakpoint
*ep
;
3203 bpstat_clear (cp_list
);
3204 root_bs
->next
= NULL
;
3206 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3208 /* Is this eventpoint a catchpoint? If not, ignore it. */
3209 ep
= ep_list
->breakpoint_at
;
3212 if ((ep
->type
!= bp_catch_load
) &&
3213 (ep
->type
!= bp_catch_unload
) &&
3214 (ep
->type
!= bp_catch_catch
) &&
3215 (ep
->type
!= bp_catch_throw
))
3216 /* pai: (temp) ADD fork/vfork here!! */
3219 /* Yes; add it to the list. */
3220 bs
= bpstat_alloc (ep
, bs
);
3225 #if defined(SOLIB_ADD)
3226 /* Also, for each triggered catchpoint, tag it with the name of
3227 the library that caused this trigger. (We copy the name now,
3228 because it's only guaranteed to be available NOW, when the
3229 catchpoint triggers. Clients who may wish to know the name
3230 later must get it from the catchpoint itself.) */
3231 if (ep
->triggered_dll_pathname
!= NULL
)
3232 xfree (ep
->triggered_dll_pathname
);
3233 if (ep
->type
== bp_catch_load
)
3234 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3235 PIDGET (inferior_ptid
));
3237 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3238 PIDGET (inferior_ptid
));
3240 dll_pathname
= NULL
;
3244 ep
->triggered_dll_pathname
= (char *)
3245 xmalloc (strlen (dll_pathname
) + 1);
3246 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3249 ep
->triggered_dll_pathname
= NULL
;
3255 /* Print B to gdb_stdout. */
3257 print_one_breakpoint (struct breakpoint
*b
,
3258 CORE_ADDR
*last_addr
)
3260 struct command_line
*l
;
3262 struct ep_type_description
3267 static struct ep_type_description bptypes
[] =
3269 {bp_none
, "?deleted?"},
3270 {bp_breakpoint
, "breakpoint"},
3271 {bp_hardware_breakpoint
, "hw breakpoint"},
3272 {bp_until
, "until"},
3273 {bp_finish
, "finish"},
3274 {bp_watchpoint
, "watchpoint"},
3275 {bp_hardware_watchpoint
, "hw watchpoint"},
3276 {bp_read_watchpoint
, "read watchpoint"},
3277 {bp_access_watchpoint
, "acc watchpoint"},
3278 {bp_longjmp
, "longjmp"},
3279 {bp_longjmp_resume
, "longjmp resume"},
3280 {bp_step_resume
, "step resume"},
3281 {bp_through_sigtramp
, "sigtramp"},
3282 {bp_watchpoint_scope
, "watchpoint scope"},
3283 {bp_call_dummy
, "call dummy"},
3284 {bp_shlib_event
, "shlib events"},
3285 {bp_thread_event
, "thread events"},
3286 {bp_overlay_event
, "overlay events"},
3287 {bp_catch_load
, "catch load"},
3288 {bp_catch_unload
, "catch unload"},
3289 {bp_catch_fork
, "catch fork"},
3290 {bp_catch_vfork
, "catch vfork"},
3291 {bp_catch_exec
, "catch exec"},
3292 {bp_catch_catch
, "catch catch"},
3293 {bp_catch_throw
, "catch throw"}
3296 static char *bpdisps
[] =
3297 {"del", "dstp", "dis", "keep"};
3298 static char bpenables
[] = "nynny";
3299 char wrap_indent
[80];
3300 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3301 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3302 struct cleanup
*bkpt_chain
;
3305 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3309 ui_out_field_int (uiout
, "number", b
->number
);
3313 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3314 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3315 internal_error (__FILE__
, __LINE__
,
3316 "bptypes table does not describe type #%d.",
3318 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3322 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3326 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3327 ui_out_spaces (uiout
, 2);
3330 strcpy (wrap_indent
, " ");
3333 if (TARGET_ADDR_BIT
<= 32)
3334 strcat (wrap_indent
, " ");
3336 strcat (wrap_indent
, " ");
3339 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3340 b
->ops
->print_one (b
, last_addr
);
3345 internal_error (__FILE__
, __LINE__
,
3346 "print_one_breakpoint: bp_none encountered\n");
3350 case bp_hardware_watchpoint
:
3351 case bp_read_watchpoint
:
3352 case bp_access_watchpoint
:
3353 /* Field 4, the address, is omitted (which makes the columns
3354 not line up too nicely with the headers, but the effect
3355 is relatively readable). */
3357 ui_out_field_skip (uiout
, "addr");
3359 print_expression (b
->exp
, stb
->stream
);
3360 ui_out_field_stream (uiout
, "what", stb
);
3364 case bp_catch_unload
:
3365 /* Field 4, the address, is omitted (which makes the columns
3366 not line up too nicely with the headers, but the effect
3367 is relatively readable). */
3369 ui_out_field_skip (uiout
, "addr");
3371 if (b
->dll_pathname
== NULL
)
3373 ui_out_field_string (uiout
, "what", "<any library>");
3374 ui_out_spaces (uiout
, 1);
3378 ui_out_text (uiout
, "library \"");
3379 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3380 ui_out_text (uiout
, "\" ");
3385 case bp_catch_vfork
:
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
->forked_inferior_pid
!= 0)
3394 ui_out_text (uiout
, "process ");
3395 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3396 ui_out_spaces (uiout
, 1);
3400 /* Field 4, the address, is omitted (which makes the columns
3401 not line up too nicely with the headers, but the effect
3402 is relatively readable). */
3404 ui_out_field_skip (uiout
, "addr");
3406 if (b
->exec_pathname
!= NULL
)
3408 ui_out_text (uiout
, "program \"");
3409 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3410 ui_out_text (uiout
, "\" ");
3414 case bp_catch_catch
:
3415 /* Field 4, the address, is omitted (which makes the columns
3416 not line up too nicely with the headers, but the effect
3417 is relatively readable). */
3419 ui_out_field_skip (uiout
, "addr");
3421 ui_out_field_string (uiout
, "what", "exception catch");
3422 ui_out_spaces (uiout
, 1);
3425 case bp_catch_throw
:
3426 /* Field 4, the address, is omitted (which makes the columns
3427 not line up too nicely with the headers, but the effect
3428 is relatively readable). */
3430 ui_out_field_skip (uiout
, "addr");
3432 ui_out_field_string (uiout
, "what", "exception throw");
3433 ui_out_spaces (uiout
, 1);
3437 case bp_hardware_breakpoint
:
3441 case bp_longjmp_resume
:
3442 case bp_step_resume
:
3443 case bp_through_sigtramp
:
3444 case bp_watchpoint_scope
:
3446 case bp_shlib_event
:
3447 case bp_thread_event
:
3448 case bp_overlay_event
:
3453 ui_out_field_string (uiout
, "addr", "<PENDING>");
3455 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
3458 *last_addr
= b
->loc
->address
;
3461 sym
= find_pc_sect_function (b
->loc
->address
, b
->loc
->section
);
3464 ui_out_text (uiout
, "in ");
3465 ui_out_field_string (uiout
, "func",
3466 SYMBOL_PRINT_NAME (sym
));
3467 ui_out_wrap_hint (uiout
, wrap_indent
);
3468 ui_out_text (uiout
, " at ");
3470 ui_out_field_string (uiout
, "file", b
->source_file
);
3471 ui_out_text (uiout
, ":");
3472 ui_out_field_int (uiout
, "line", b
->line_number
);
3474 else if (b
->pending
)
3476 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3480 print_address_symbolic (b
->loc
->address
, stb
->stream
, demangle
, "");
3481 ui_out_field_stream (uiout
, "at", stb
);
3486 if (b
->thread
!= -1)
3488 /* FIXME: This seems to be redundant and lost here; see the
3489 "stop only in" line a little further down. */
3490 ui_out_text (uiout
, " thread ");
3491 ui_out_field_int (uiout
, "thread", b
->thread
);
3494 ui_out_text (uiout
, "\n");
3496 if (frame_id_p (b
->frame_id
))
3499 ui_out_text (uiout
, "\tstop only in stack frame at ");
3500 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3502 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3503 ui_out_text (uiout
, "\n");
3509 ui_out_text (uiout
, "\tstop only if ");
3510 print_expression (b
->cond
, stb
->stream
);
3511 ui_out_field_stream (uiout
, "cond", stb
);
3512 ui_out_text (uiout
, "\n");
3515 if (b
->pending
&& b
->cond_string
)
3518 ui_out_text (uiout
, "\tstop only if ");
3519 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3520 ui_out_text (uiout
, "\n");
3523 if (b
->thread
!= -1)
3525 /* FIXME should make an annotation for this */
3526 ui_out_text (uiout
, "\tstop only in thread ");
3527 ui_out_field_int (uiout
, "thread", b
->thread
);
3528 ui_out_text (uiout
, "\n");
3531 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3533 /* FIXME should make an annotation for this */
3534 if (ep_is_catchpoint (b
))
3535 ui_out_text (uiout
, "\tcatchpoint");
3537 ui_out_text (uiout
, "\tbreakpoint");
3538 ui_out_text (uiout
, " already hit ");
3539 ui_out_field_int (uiout
, "times", b
->hit_count
);
3540 if (b
->hit_count
== 1)
3541 ui_out_text (uiout
, " time\n");
3543 ui_out_text (uiout
, " times\n");
3546 /* Output the count also if it is zero, but only if this is
3547 mi. FIXME: Should have a better test for this. */
3548 if (ui_out_is_mi_like_p (uiout
))
3549 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3550 ui_out_field_int (uiout
, "times", b
->hit_count
);
3552 if (b
->ignore_count
)
3555 ui_out_text (uiout
, "\tignore next ");
3556 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3557 ui_out_text (uiout
, " hits\n");
3560 if ((l
= b
->commands
))
3562 struct cleanup
*script_chain
;
3565 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3566 print_command_lines (uiout
, l
, 4);
3567 do_cleanups (script_chain
);
3569 do_cleanups (bkpt_chain
);
3570 do_cleanups (old_chain
);
3573 struct captured_breakpoint_query_args
3579 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3581 struct captured_breakpoint_query_args
*args
= data
;
3582 struct breakpoint
*b
;
3583 CORE_ADDR dummy_addr
= 0;
3586 if (args
->bnum
== b
->number
)
3588 print_one_breakpoint (b
, &dummy_addr
);
3596 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3598 struct captured_breakpoint_query_args args
;
3600 /* For the moment we don't trust print_one_breakpoint() to not throw
3602 return catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3603 error_message
, RETURN_MASK_ALL
);
3606 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3607 catchpoints, et.al.). */
3610 user_settable_breakpoint (const struct breakpoint
*b
)
3612 return (b
->type
== bp_breakpoint
3613 || b
->type
== bp_catch_load
3614 || b
->type
== bp_catch_unload
3615 || b
->type
== bp_catch_fork
3616 || b
->type
== bp_catch_vfork
3617 || b
->type
== bp_catch_exec
3618 || b
->type
== bp_catch_catch
3619 || b
->type
== bp_catch_throw
3620 || b
->type
== bp_hardware_breakpoint
3621 || b
->type
== bp_watchpoint
3622 || b
->type
== bp_read_watchpoint
3623 || b
->type
== bp_access_watchpoint
3624 || b
->type
== bp_hardware_watchpoint
);
3627 /* Print information on user settable breakpoint (watchpoint, etc)
3628 number BNUM. If BNUM is -1 print all user settable breakpoints.
3629 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3632 breakpoint_1 (int bnum
, int allflag
)
3634 struct breakpoint
*b
;
3635 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3636 int nr_printable_breakpoints
;
3637 struct cleanup
*bkpttbl_chain
;
3639 /* Compute the number of rows in the table. */
3640 nr_printable_breakpoints
= 0;
3643 || bnum
== b
->number
)
3645 if (allflag
|| user_settable_breakpoint (b
))
3646 nr_printable_breakpoints
++;
3651 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3655 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3658 if (nr_printable_breakpoints
> 0)
3659 annotate_breakpoints_headers ();
3660 if (nr_printable_breakpoints
> 0)
3662 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3663 if (nr_printable_breakpoints
> 0)
3665 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3666 if (nr_printable_breakpoints
> 0)
3668 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3669 if (nr_printable_breakpoints
> 0)
3671 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3674 if (nr_printable_breakpoints
> 0)
3676 if (TARGET_ADDR_BIT
<= 32)
3677 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3679 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3681 if (nr_printable_breakpoints
> 0)
3683 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3684 ui_out_table_body (uiout
);
3685 if (nr_printable_breakpoints
> 0)
3686 annotate_breakpoints_table ();
3690 || bnum
== b
->number
)
3692 /* We only print out user settable breakpoints unless the
3694 if (allflag
|| user_settable_breakpoint (b
))
3695 print_one_breakpoint (b
, &last_addr
);
3698 do_cleanups (bkpttbl_chain
);
3700 if (nr_printable_breakpoints
== 0)
3703 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3705 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3710 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3711 that a comparison of an unsigned with -1 is always false. */
3712 if (last_addr
!= (CORE_ADDR
) -1)
3713 set_next_address (last_addr
);
3716 /* FIXME? Should this be moved up so that it is only called when
3717 there have been breakpoints? */
3718 annotate_breakpoints_table_end ();
3722 breakpoints_info (char *bnum_exp
, int from_tty
)
3727 bnum
= parse_and_eval_long (bnum_exp
);
3729 breakpoint_1 (bnum
, 0);
3733 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3738 bnum
= parse_and_eval_long (bnum_exp
);
3740 breakpoint_1 (bnum
, 1);
3743 /* Print a message describing any breakpoints set at PC. */
3746 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3749 struct breakpoint
*b
;
3752 if (b
->loc
->address
== pc
) /* address match / overlay match */
3753 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3757 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3759 if (b
->loc
->address
== pc
) /* address match / overlay match */
3760 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3763 printf_filtered ("%d%s%s ",
3765 ((b
->enable_state
== bp_disabled
||
3766 b
->enable_state
== bp_shlib_disabled
||
3767 b
->enable_state
== bp_call_disabled
)
3769 : b
->enable_state
== bp_permanent
3773 : ((others
== 1) ? " and" : ""));
3775 printf_filtered ("also set at pc ");
3776 print_address_numeric (pc
, 1, gdb_stdout
);
3777 printf_filtered (".\n");
3781 /* Set the default place to put a breakpoint
3782 for the `break' command with no arguments. */
3785 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3788 default_breakpoint_valid
= valid
;
3789 default_breakpoint_address
= addr
;
3790 default_breakpoint_symtab
= symtab
;
3791 default_breakpoint_line
= line
;
3794 /* Return true iff it is meaningful to use the address member of
3795 BPT. For some breakpoint types, the address member is irrelevant
3796 and it makes no sense to attempt to compare it to other addresses
3797 (or use it for any other purpose either).
3799 More specifically, each of the following breakpoint types will always
3800 have a zero valued address and we don't want check_duplicates() to mark
3801 breakpoints of any of these types to be a duplicate of an actual
3802 breakpoint at address zero:
3805 bp_hardware_watchpoint
3807 bp_access_watchpoint
3814 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3816 enum bptype type
= bpt
->type
;
3818 return (type
!= bp_watchpoint
3819 && type
!= bp_hardware_watchpoint
3820 && type
!= bp_read_watchpoint
3821 && type
!= bp_access_watchpoint
3822 && type
!= bp_catch_exec
3823 && type
!= bp_longjmp_resume
3824 && type
!= bp_catch_fork
3825 && type
!= bp_catch_vfork
);
3828 /* Rescan breakpoints at the same address and section as BPT,
3829 marking the first one as "first" and any others as "duplicates".
3830 This is so that the bpt instruction is only inserted once.
3831 If we have a permanent breakpoint at the same place as BPT, make
3832 that one the official one, and the rest as duplicates. */
3835 check_duplicates (struct breakpoint
*bpt
)
3837 struct bp_location
*b
;
3839 struct bp_location
*perm_bp
= 0;
3840 CORE_ADDR address
= bpt
->loc
->address
;
3841 asection
*section
= bpt
->loc
->section
;
3843 if (! breakpoint_address_is_meaningful (bpt
))
3846 ALL_BP_LOCATIONS (b
)
3847 if (b
->owner
->enable_state
!= bp_disabled
3848 && b
->owner
->enable_state
!= bp_shlib_disabled
3849 && !b
->owner
->pending
3850 && b
->owner
->enable_state
!= bp_call_disabled
3851 && b
->address
== address
/* address / overlay match */
3852 && (!overlay_debugging
|| b
->section
== section
)
3853 && breakpoint_address_is_meaningful (b
->owner
))
3855 /* Have we found a permanent breakpoint? */
3856 if (b
->owner
->enable_state
== bp_permanent
)
3863 b
->duplicate
= count
> 1;
3866 /* If we found a permanent breakpoint at this address, go over the
3867 list again and declare all the other breakpoints there to be the
3871 perm_bp
->duplicate
= 0;
3873 /* Permanent breakpoint should always be inserted. */
3874 if (! perm_bp
->inserted
)
3875 internal_error (__FILE__
, __LINE__
,
3876 "allegedly permanent breakpoint is not "
3877 "actually inserted");
3879 ALL_BP_LOCATIONS (b
)
3882 if (b
->owner
->enable_state
!= bp_disabled
3883 && b
->owner
->enable_state
!= bp_shlib_disabled
3884 && !b
->owner
->pending
3885 && b
->owner
->enable_state
!= bp_call_disabled
3886 && b
->address
== address
/* address / overlay match */
3887 && (!overlay_debugging
|| b
->section
== section
)
3888 && breakpoint_address_is_meaningful (b
->owner
))
3891 internal_error (__FILE__
, __LINE__
,
3892 "another breakpoint was inserted on top of "
3893 "a permanent breakpoint");
3902 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
3903 int bnum
, int have_bnum
)
3908 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
3909 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
3911 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
3912 bnum
, astr1
, astr2
);
3914 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
3917 /* Adjust a breakpoint's address to account for architectural constraints
3918 on breakpoint placement. Return the adjusted address. Note: Very
3919 few targets require this kind of adjustment. For most targets,
3920 this function is simply the identity function. */
3923 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
3925 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
3927 /* Very few targets need any kind of breakpoint adjustment. */
3930 else if (bptype
== bp_watchpoint
3931 || bptype
== bp_hardware_watchpoint
3932 || bptype
== bp_read_watchpoint
3933 || bptype
== bp_access_watchpoint
3934 || bptype
== bp_catch_fork
3935 || bptype
== bp_catch_vfork
3936 || bptype
== bp_catch_exec
)
3938 /* Watchpoints and the various bp_catch_* eventpoints should not
3939 have their addresses modified. */
3944 CORE_ADDR adjusted_bpaddr
;
3946 /* Some targets have architectural constraints on the placement
3947 of breakpoint instructions. Obtain the adjusted address. */
3948 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
3951 /* An adjusted breakpoint address can significantly alter
3952 a user's expectations. Print a warning if an adjustment
3954 if (adjusted_bpaddr
!= bpaddr
)
3955 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
3957 return adjusted_bpaddr
;
3961 /* Allocate a struct bp_location. */
3963 static struct bp_location
*
3964 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
3966 struct bp_location
*loc
, *loc_p
;
3968 loc
= xmalloc (sizeof (struct bp_location
));
3969 memset (loc
, 0, sizeof (*loc
));
3979 case bp_longjmp_resume
:
3980 case bp_step_resume
:
3981 case bp_through_sigtramp
:
3982 case bp_watchpoint_scope
:
3984 case bp_shlib_event
:
3985 case bp_thread_event
:
3986 case bp_overlay_event
:
3988 case bp_catch_unload
:
3989 loc
->loc_type
= bp_loc_software_breakpoint
;
3991 case bp_hardware_breakpoint
:
3992 loc
->loc_type
= bp_loc_hardware_breakpoint
;
3994 case bp_hardware_watchpoint
:
3995 case bp_read_watchpoint
:
3996 case bp_access_watchpoint
:
3997 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4001 case bp_catch_vfork
:
4003 case bp_catch_catch
:
4004 case bp_catch_throw
:
4005 loc
->loc_type
= bp_loc_other
;
4008 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
4011 /* Add this breakpoint to the end of the chain. */
4013 loc_p
= bp_location_chain
;
4015 bp_location_chain
= loc
;
4019 loc_p
= loc_p
->next
;
4026 /* set_raw_breakpoint() is a low level routine for allocating and
4027 partially initializing a breakpoint of type BPTYPE. The newly
4028 created breakpoint's address, section, source file name, and line
4029 number are provided by SAL. The newly created and partially
4030 initialized breakpoint is added to the breakpoint chain and
4031 is also returned as the value of this function.
4033 It is expected that the caller will complete the initialization of
4034 the newly created breakpoint struct as well as output any status
4035 information regarding the creation of a new breakpoint. In
4036 particular, set_raw_breakpoint() does NOT set the breakpoint
4037 number! Care should be taken to not allow an error() to occur
4038 prior to completing the initialization of the breakpoint. If this
4039 should happen, a bogus breakpoint will be left on the chain. */
4042 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4044 struct breakpoint
*b
, *b1
;
4046 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4047 memset (b
, 0, sizeof (*b
));
4048 b
->loc
= allocate_bp_location (b
, bptype
);
4049 b
->loc
->requested_address
= sal
.pc
;
4050 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
,
4052 if (sal
.symtab
== NULL
)
4053 b
->source_file
= NULL
;
4055 b
->source_file
= savestring (sal
.symtab
->filename
,
4056 strlen (sal
.symtab
->filename
));
4057 b
->loc
->section
= sal
.section
;
4059 b
->language
= current_language
->la_language
;
4060 b
->input_radix
= input_radix
;
4062 b
->line_number
= sal
.line
;
4063 b
->enable_state
= bp_enabled
;
4066 b
->ignore_count
= 0;
4068 b
->frame_id
= null_frame_id
;
4069 b
->dll_pathname
= NULL
;
4070 b
->triggered_dll_pathname
= NULL
;
4071 b
->forked_inferior_pid
= 0;
4072 b
->exec_pathname
= NULL
;
4076 /* Add this breakpoint to the end of the chain
4077 so that a list of breakpoints will come out in order
4078 of increasing numbers. */
4080 b1
= breakpoint_chain
;
4082 breakpoint_chain
= b
;
4090 check_duplicates (b
);
4091 breakpoints_changed ();
4097 /* Note that the breakpoint object B describes a permanent breakpoint
4098 instruction, hard-wired into the inferior's code. */
4100 make_breakpoint_permanent (struct breakpoint
*b
)
4102 b
->enable_state
= bp_permanent
;
4104 /* By definition, permanent breakpoints are already present in the code. */
4105 b
->loc
->inserted
= 1;
4108 static struct breakpoint
*
4109 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4111 static int internal_breakpoint_number
= -1;
4112 struct symtab_and_line sal
;
4113 struct breakpoint
*b
;
4115 init_sal (&sal
); /* initialize to zeroes */
4118 sal
.section
= find_pc_overlay (sal
.pc
);
4120 b
= set_raw_breakpoint (sal
, type
);
4121 b
->number
= internal_breakpoint_number
--;
4122 b
->disposition
= disp_donttouch
;
4129 create_longjmp_breakpoint (char *func_name
)
4131 struct breakpoint
*b
;
4132 struct minimal_symbol
*m
;
4134 if (func_name
== NULL
)
4135 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
4138 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4141 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4144 b
->enable_state
= bp_disabled
;
4147 b
->addr_string
= xstrdup (func_name
);
4150 /* Call this routine when stepping and nexting to enable a breakpoint
4151 if we do a longjmp(). When we hit that breakpoint, call
4152 set_longjmp_resume_breakpoint() to figure out where we are going. */
4155 enable_longjmp_breakpoint (void)
4157 struct breakpoint
*b
;
4160 if (b
->type
== bp_longjmp
)
4162 b
->enable_state
= bp_enabled
;
4163 check_duplicates (b
);
4168 disable_longjmp_breakpoint (void)
4170 struct breakpoint
*b
;
4173 if (b
->type
== bp_longjmp
4174 || b
->type
== bp_longjmp_resume
)
4176 b
->enable_state
= bp_disabled
;
4177 check_duplicates (b
);
4182 create_overlay_event_breakpoint (char *func_name
)
4184 struct breakpoint
*b
;
4185 struct minimal_symbol
*m
;
4187 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4190 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4192 b
->addr_string
= xstrdup (func_name
);
4194 if (overlay_debugging
== ovly_auto
)
4196 b
->enable_state
= bp_enabled
;
4197 overlay_events_enabled
= 1;
4201 b
->enable_state
= bp_disabled
;
4202 overlay_events_enabled
= 0;
4207 enable_overlay_breakpoints (void)
4209 struct breakpoint
*b
;
4212 if (b
->type
== bp_overlay_event
)
4214 b
->enable_state
= bp_enabled
;
4215 check_duplicates (b
);
4216 overlay_events_enabled
= 1;
4221 disable_overlay_breakpoints (void)
4223 struct breakpoint
*b
;
4226 if (b
->type
== bp_overlay_event
)
4228 b
->enable_state
= bp_disabled
;
4229 check_duplicates (b
);
4230 overlay_events_enabled
= 0;
4235 create_thread_event_breakpoint (CORE_ADDR address
)
4237 struct breakpoint
*b
;
4239 b
= create_internal_breakpoint (address
, bp_thread_event
);
4241 b
->enable_state
= bp_enabled
;
4242 /* addr_string has to be used or breakpoint_re_set will delete me. */
4243 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4249 remove_thread_event_breakpoints (void)
4251 struct breakpoint
*b
, *temp
;
4253 ALL_BREAKPOINTS_SAFE (b
, temp
)
4254 if (b
->type
== bp_thread_event
)
4255 delete_breakpoint (b
);
4258 struct captured_parse_breakpoint_args
4261 struct symtabs_and_lines
*sals_p
;
4262 char ***addr_string_p
;
4266 struct lang_and_radix
4272 /* Cleanup helper routine to restore the current language and
4275 do_restore_lang_radix_cleanup (void *old
)
4277 struct lang_and_radix
*p
= old
;
4278 set_language (p
->lang
);
4279 input_radix
= p
->radix
;
4282 /* Try and resolve a pending breakpoint. */
4284 resolve_pending_breakpoint (struct breakpoint
*b
)
4286 /* Try and reparse the breakpoint in case the shared library
4288 struct symtabs_and_lines sals
;
4289 struct symtab_and_line pending_sal
;
4290 char **cond_string
= (char **) NULL
;
4291 char *copy_arg
= b
->addr_string
;
4296 struct ui_file
*old_gdb_stderr
;
4297 struct lang_and_radix old_lr
;
4298 struct cleanup
*old_chain
;
4300 /* Set language, input-radix, then reissue breakpoint command.
4301 Ensure the language and input-radix are restored afterwards. */
4302 old_lr
.lang
= current_language
->la_language
;
4303 old_lr
.radix
= input_radix
;
4304 old_chain
= make_cleanup (do_restore_lang_radix_cleanup
, &old_lr
);
4306 set_language (b
->language
);
4307 input_radix
= b
->input_radix
;
4308 rc
= break_command_1 (b
->addr_string
, b
->flag
, b
->from_tty
, b
);
4310 if (rc
== GDB_RC_OK
)
4311 /* Pending breakpoint has been resolved. */
4312 printf_filtered ("Pending breakpoint \"%s\" resolved\n", b
->addr_string
);
4314 do_cleanups (old_chain
);
4320 remove_solib_event_breakpoints (void)
4322 struct breakpoint
*b
, *temp
;
4324 ALL_BREAKPOINTS_SAFE (b
, temp
)
4325 if (b
->type
== bp_shlib_event
)
4326 delete_breakpoint (b
);
4330 create_solib_event_breakpoint (CORE_ADDR address
)
4332 struct breakpoint
*b
;
4334 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4338 /* Disable any breakpoints that are on code in shared libraries. Only
4339 apply to enabled breakpoints, disabled ones can just stay disabled. */
4342 disable_breakpoints_in_shlibs (int silent
)
4344 struct breakpoint
*b
;
4345 int disabled_shlib_breaks
= 0;
4347 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4350 #if defined (PC_SOLIB)
4351 if (((b
->type
== bp_breakpoint
) ||
4352 (b
->type
== bp_hardware_breakpoint
)) &&
4353 breakpoint_enabled (b
) &&
4354 !b
->loc
->duplicate
&&
4355 PC_SOLIB (b
->loc
->address
))
4357 b
->enable_state
= bp_shlib_disabled
;
4360 if (!disabled_shlib_breaks
)
4362 target_terminal_ours_for_output ();
4363 warning (_("Temporarily disabling shared library breakpoints:"));
4365 disabled_shlib_breaks
= 1;
4366 warning (_("breakpoint #%d "), b
->number
);
4373 /* Disable any breakpoints that are in in an unloaded shared library. Only
4374 apply to enabled breakpoints, disabled ones can just stay disabled. */
4377 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4379 struct breakpoint
*b
;
4380 int disabled_shlib_breaks
= 0;
4382 #if defined (PC_SOLIB)
4383 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4386 if ((b
->loc
->loc_type
== bp_loc_hardware_breakpoint
4387 || b
->loc
->loc_type
== bp_loc_software_breakpoint
)
4388 && breakpoint_enabled (b
)
4389 && !b
->loc
->duplicate
)
4391 char *so_name
= PC_SOLIB (b
->loc
->address
);
4393 && !strcmp (so_name
, solib
->so_name
))
4395 b
->enable_state
= bp_shlib_disabled
;
4396 /* At this point, we cannot rely on remove_breakpoint
4397 succeeding so we must mark the breakpoint as not inserted
4398 to prevent future errors occurring in remove_breakpoints. */
4399 b
->loc
->inserted
= 0;
4400 if (!disabled_shlib_breaks
)
4402 target_terminal_ours_for_output ();
4403 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4406 disabled_shlib_breaks
= 1;
4413 /* Try to reenable any breakpoints in shared libraries. */
4415 re_enable_breakpoints_in_shlibs (void)
4417 struct breakpoint
*b
, *tmp
;
4419 ALL_BREAKPOINTS_SAFE (b
, tmp
)
4421 if (b
->enable_state
== bp_shlib_disabled
)
4425 /* Do not reenable the breakpoint if the shared library
4426 is still not mapped in. */
4427 lib
= PC_SOLIB (b
->loc
->address
);
4428 if (lib
!= NULL
&& target_read_memory (b
->loc
->address
, buf
, 1) == 0)
4429 b
->enable_state
= bp_enabled
;
4431 else if (b
->pending
&& (b
->enable_state
== bp_enabled
))
4433 if (resolve_pending_breakpoint (b
) == GDB_RC_OK
)
4434 delete_breakpoint (b
);
4442 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4443 char *cond_string
, enum bptype bp_kind
)
4445 struct breakpoint
*b
;
4446 struct symtabs_and_lines sals
;
4447 struct cleanup
*old_chain
;
4448 struct cleanup
*canonical_strings_chain
= NULL
;
4449 char *addr_start
= hookname
;
4450 char *addr_end
= NULL
;
4451 char **canonical
= (char **) NULL
;
4452 int thread
= -1; /* All threads. */
4454 /* Set a breakpoint on the specified hook. */
4455 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
,
4456 0, &canonical
, NULL
);
4457 addr_end
= hookname
;
4459 if (sals
.nelts
== 0)
4461 warning (_("Unable to set a breakpoint on dynamic linker callback.\n"
4462 "Suggest linking with /opt/langtools/lib/end.o.\n"
4463 "GDB will be unable to track shl_load/shl_unload calls."));
4466 if (sals
.nelts
!= 1)
4468 warning (_("Unable to set unique breakpoint on dynamic linker callback.\n"
4469 "GDB will be unable to track shl_load/shl_unload calls."));
4473 /* Make sure that all storage allocated in decode_line_1 gets freed
4474 in case the following errors out. */
4475 old_chain
= make_cleanup (xfree
, sals
.sals
);
4476 if (canonical
!= (char **) NULL
)
4478 make_cleanup (xfree
, canonical
);
4479 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4480 if (canonical
[0] != NULL
)
4481 make_cleanup (xfree
, canonical
[0]);
4484 resolve_sal_pc (&sals
.sals
[0]);
4486 /* Remove the canonical strings from the cleanup, they are needed below. */
4487 if (canonical
!= (char **) NULL
)
4488 discard_cleanups (canonical_strings_chain
);
4490 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4491 set_breakpoint_count (breakpoint_count
+ 1);
4492 b
->number
= breakpoint_count
;
4494 b
->cond_string
= (cond_string
== NULL
) ?
4495 NULL
: savestring (cond_string
, strlen (cond_string
));
4498 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4499 b
->addr_string
= canonical
[0];
4500 else if (addr_start
)
4501 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4503 b
->enable_state
= bp_enabled
;
4504 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4506 if (dll_pathname
== NULL
)
4507 b
->dll_pathname
= NULL
;
4510 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4511 strcpy (b
->dll_pathname
, dll_pathname
);
4515 do_cleanups (old_chain
);
4519 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4520 char *dll_pathname
, char *cond_string
)
4522 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4523 cond_string
, bp_catch_load
);
4527 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4528 char *dll_pathname
, char *cond_string
)
4530 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4531 cond_string
, bp_catch_unload
);
4535 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4536 enum bptype bp_kind
)
4538 struct symtab_and_line sal
;
4539 struct breakpoint
*b
;
4540 int thread
= -1; /* All threads. */
4547 b
= set_raw_breakpoint (sal
, bp_kind
);
4548 set_breakpoint_count (breakpoint_count
+ 1);
4549 b
->number
= breakpoint_count
;
4551 b
->cond_string
= (cond_string
== NULL
) ?
4552 NULL
: savestring (cond_string
, strlen (cond_string
));
4554 b
->addr_string
= NULL
;
4555 b
->enable_state
= bp_enabled
;
4556 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4557 b
->forked_inferior_pid
= 0;
4563 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4565 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4569 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4571 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4575 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4577 struct symtab_and_line sal
;
4578 struct breakpoint
*b
;
4579 int thread
= -1; /* All threads. */
4586 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4587 set_breakpoint_count (breakpoint_count
+ 1);
4588 b
->number
= breakpoint_count
;
4590 b
->cond_string
= (cond_string
== NULL
) ?
4591 NULL
: savestring (cond_string
, strlen (cond_string
));
4593 b
->addr_string
= NULL
;
4594 b
->enable_state
= bp_enabled
;
4595 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4601 hw_breakpoint_used_count (void)
4603 struct breakpoint
*b
;
4608 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4616 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4618 struct breakpoint
*b
;
4621 *other_type_used
= 0;
4624 if (breakpoint_enabled (b
))
4626 if (b
->type
== type
)
4628 else if ((b
->type
== bp_hardware_watchpoint
||
4629 b
->type
== bp_read_watchpoint
||
4630 b
->type
== bp_access_watchpoint
))
4631 *other_type_used
= 1;
4637 /* Call this after hitting the longjmp() breakpoint. Use this to set
4638 a new breakpoint at the target of the jmp_buf.
4640 FIXME - This ought to be done by setting a temporary breakpoint
4641 that gets deleted automatically... */
4644 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4646 struct breakpoint
*b
;
4649 if (b
->type
== bp_longjmp_resume
)
4651 b
->loc
->requested_address
= pc
;
4652 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
,
4654 b
->enable_state
= bp_enabled
;
4655 b
->frame_id
= frame_id
;
4656 check_duplicates (b
);
4662 disable_watchpoints_before_interactive_call_start (void)
4664 struct breakpoint
*b
;
4668 if (((b
->type
== bp_watchpoint
)
4669 || (b
->type
== bp_hardware_watchpoint
)
4670 || (b
->type
== bp_read_watchpoint
)
4671 || (b
->type
== bp_access_watchpoint
)
4672 || ep_is_exception_catchpoint (b
))
4673 && breakpoint_enabled (b
))
4675 b
->enable_state
= bp_call_disabled
;
4676 check_duplicates (b
);
4682 enable_watchpoints_after_interactive_call_stop (void)
4684 struct breakpoint
*b
;
4688 if (((b
->type
== bp_watchpoint
)
4689 || (b
->type
== bp_hardware_watchpoint
)
4690 || (b
->type
== bp_read_watchpoint
)
4691 || (b
->type
== bp_access_watchpoint
)
4692 || ep_is_exception_catchpoint (b
))
4693 && (b
->enable_state
== bp_call_disabled
))
4695 b
->enable_state
= bp_enabled
;
4696 check_duplicates (b
);
4702 /* Set a breakpoint that will evaporate an end of command
4703 at address specified by SAL.
4704 Restrict it to frame FRAME if FRAME is nonzero. */
4707 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4710 struct breakpoint
*b
;
4711 b
= set_raw_breakpoint (sal
, type
);
4712 b
->enable_state
= bp_enabled
;
4713 b
->disposition
= disp_donttouch
;
4714 b
->frame_id
= frame_id
;
4716 /* If we're debugging a multi-threaded program, then we
4717 want momentary breakpoints to be active in only a
4718 single thread of control. */
4719 if (in_thread_list (inferior_ptid
))
4720 b
->thread
= pid_to_thread_id (inferior_ptid
);
4726 /* Tell the user we have just set a breakpoint B. */
4729 mention (struct breakpoint
*b
)
4732 struct cleanup
*old_chain
, *ui_out_chain
;
4733 struct ui_stream
*stb
;
4735 stb
= ui_out_stream_new (uiout
);
4736 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4738 /* FIXME: This is misplaced; mention() is called by things (like
4739 hitting a watchpoint) other than breakpoint creation. It should
4740 be possible to clean this up and at the same time replace the
4741 random calls to breakpoint_changed with this hook, as has already
4742 been done for deprecated_delete_breakpoint_hook and so on. */
4743 if (deprecated_create_breakpoint_hook
)
4744 deprecated_create_breakpoint_hook (b
);
4745 breakpoint_create_event (b
->number
);
4747 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4748 b
->ops
->print_mention (b
);
4753 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4756 ui_out_text (uiout
, "Watchpoint ");
4757 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4758 ui_out_field_int (uiout
, "number", b
->number
);
4759 ui_out_text (uiout
, ": ");
4760 print_expression (b
->exp
, stb
->stream
);
4761 ui_out_field_stream (uiout
, "exp", stb
);
4762 do_cleanups (ui_out_chain
);
4764 case bp_hardware_watchpoint
:
4765 ui_out_text (uiout
, "Hardware watchpoint ");
4766 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4767 ui_out_field_int (uiout
, "number", b
->number
);
4768 ui_out_text (uiout
, ": ");
4769 print_expression (b
->exp
, stb
->stream
);
4770 ui_out_field_stream (uiout
, "exp", stb
);
4771 do_cleanups (ui_out_chain
);
4773 case bp_read_watchpoint
:
4774 ui_out_text (uiout
, "Hardware read watchpoint ");
4775 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4776 ui_out_field_int (uiout
, "number", b
->number
);
4777 ui_out_text (uiout
, ": ");
4778 print_expression (b
->exp
, stb
->stream
);
4779 ui_out_field_stream (uiout
, "exp", stb
);
4780 do_cleanups (ui_out_chain
);
4782 case bp_access_watchpoint
:
4783 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4784 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4785 ui_out_field_int (uiout
, "number", b
->number
);
4786 ui_out_text (uiout
, ": ");
4787 print_expression (b
->exp
, stb
->stream
);
4788 ui_out_field_stream (uiout
, "exp", stb
);
4789 do_cleanups (ui_out_chain
);
4792 if (ui_out_is_mi_like_p (uiout
))
4797 printf_filtered ("Breakpoint %d", b
->number
);
4800 case bp_hardware_breakpoint
:
4801 if (ui_out_is_mi_like_p (uiout
))
4806 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4810 case bp_catch_unload
:
4811 printf_filtered ("Catchpoint %d (%s %s)",
4813 (b
->type
== bp_catch_load
) ? "load" : "unload",
4814 (b
->dll_pathname
!= NULL
) ?
4815 b
->dll_pathname
: "<any library>");
4818 case bp_catch_vfork
:
4819 printf_filtered ("Catchpoint %d (%s)",
4821 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4824 printf_filtered ("Catchpoint %d (exec)",
4827 case bp_catch_catch
:
4828 case bp_catch_throw
:
4829 printf_filtered ("Catchpoint %d (%s)",
4831 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4837 case bp_longjmp_resume
:
4838 case bp_step_resume
:
4839 case bp_through_sigtramp
:
4841 case bp_watchpoint_scope
:
4842 case bp_shlib_event
:
4843 case bp_thread_event
:
4844 case bp_overlay_event
:
4852 printf_filtered (" (%s) pending.", b
->addr_string
);
4856 if (addressprint
|| b
->source_file
== NULL
)
4858 printf_filtered (" at ");
4859 print_address_numeric (b
->loc
->address
, 1, gdb_stdout
);
4862 printf_filtered (": file %s, line %d.",
4863 b
->source_file
, b
->line_number
);
4866 do_cleanups (old_chain
);
4867 if (ui_out_is_mi_like_p (uiout
))
4869 printf_filtered ("\n");
4873 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4874 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4875 COND[i] and COND_STRING[i] values.
4877 The parameter PENDING_BP points to a pending breakpoint that is
4878 the basis of the breakpoints currently being created. The pending
4879 breakpoint may contain a separate condition string or commands
4880 that were added after the initial pending breakpoint was created.
4882 NOTE: If the function succeeds, the caller is expected to cleanup
4883 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4884 array contents). If the function fails (error() is called), the
4885 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4886 COND and SALS arrays and each of those arrays contents. */
4889 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4890 struct expression
**cond
, char **cond_string
,
4891 enum bptype type
, enum bpdisp disposition
,
4892 int thread
, int ignore_count
, int from_tty
,
4893 struct breakpoint
*pending_bp
)
4895 if (type
== bp_hardware_breakpoint
)
4897 int i
= hw_breakpoint_used_count ();
4898 int target_resources_ok
=
4899 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4901 if (target_resources_ok
== 0)
4902 error (_("No hardware breakpoint support in the target."));
4903 else if (target_resources_ok
< 0)
4904 error (_("Hardware breakpoints used exceeds limit."));
4907 /* Now set all the breakpoints. */
4910 for (i
= 0; i
< sals
.nelts
; i
++)
4912 struct breakpoint
*b
;
4913 struct symtab_and_line sal
= sals
.sals
[i
];
4916 describe_other_breakpoints (sal
.pc
, sal
.section
);
4918 b
= set_raw_breakpoint (sal
, type
);
4919 set_breakpoint_count (breakpoint_count
+ 1);
4920 b
->number
= breakpoint_count
;
4924 b
->addr_string
= addr_string
[i
];
4926 /* addr_string has to be used or breakpoint_re_set will delete
4928 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4929 b
->cond_string
= cond_string
[i
];
4930 b
->ignore_count
= ignore_count
;
4931 b
->enable_state
= bp_enabled
;
4932 b
->disposition
= disposition
;
4933 /* If resolving a pending breakpoint, a check must be made to see if
4934 the user has specified a new condition or commands for the
4935 breakpoint. A new condition will override any condition that was
4936 initially specified with the initial breakpoint command. */
4940 if (pending_bp
->cond_string
)
4942 arg
= pending_bp
->cond_string
;
4943 b
->cond_string
= savestring (arg
, strlen (arg
));
4944 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
4946 error (_("Junk at end of pending breakpoint condition expression"));
4948 /* If there are commands associated with the breakpoint, they should
4950 if (pending_bp
->commands
)
4951 b
->commands
= copy_command_lines (pending_bp
->commands
);
4953 /* We have to copy over the ignore_count and thread as well. */
4954 b
->ignore_count
= pending_bp
->ignore_count
;
4955 b
->thread
= pending_bp
->thread
;
4962 /* Parse ARG which is assumed to be a SAL specification possibly
4963 followed by conditionals. On return, SALS contains an array of SAL
4964 addresses found. ADDR_STRING contains a vector of (canonical)
4965 address strings. ARG points to the end of the SAL. */
4968 parse_breakpoint_sals (char **address
,
4969 struct symtabs_and_lines
*sals
,
4970 char ***addr_string
,
4973 char *addr_start
= *address
;
4974 *addr_string
= NULL
;
4975 /* If no arg given, or if first arg is 'if ', use the default
4977 if ((*address
) == NULL
4978 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4980 if (default_breakpoint_valid
)
4982 struct symtab_and_line sal
;
4983 init_sal (&sal
); /* initialize to zeroes */
4984 sals
->sals
= (struct symtab_and_line
*)
4985 xmalloc (sizeof (struct symtab_and_line
));
4986 sal
.pc
= default_breakpoint_address
;
4987 sal
.line
= default_breakpoint_line
;
4988 sal
.symtab
= default_breakpoint_symtab
;
4989 sal
.section
= find_pc_overlay (sal
.pc
);
4990 sals
->sals
[0] = sal
;
4994 error (_("No default breakpoint address now."));
4998 /* Force almost all breakpoints to be in terms of the
4999 current_source_symtab (which is decode_line_1's default). This
5000 should produce the results we want almost all of the time while
5001 leaving default_breakpoint_* alone.
5002 ObjC: However, don't match an Objective-C method name which
5003 may have a '+' or '-' succeeded by a '[' */
5005 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5007 if (default_breakpoint_valid
5009 || ((strchr ("+-", (*address
)[0]) != NULL
)
5010 && ((*address
)[1] != '['))))
5011 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5012 default_breakpoint_line
, addr_string
,
5015 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5016 addr_string
, not_found_ptr
);
5018 /* For any SAL that didn't have a canonical string, fill one in. */
5019 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5020 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5021 if (addr_start
!= (*address
))
5024 for (i
= 0; i
< sals
->nelts
; i
++)
5026 /* Add the string if not present. */
5027 if ((*addr_string
)[i
] == NULL
)
5028 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5034 /* Convert each SAL into a real PC. Verify that the PC can be
5035 inserted as a breakpoint. If it can't throw an error. */
5038 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5042 for (i
= 0; i
< sals
->nelts
; i
++)
5044 resolve_sal_pc (&sals
->sals
[i
]);
5046 /* It's possible for the PC to be nonzero, but still an illegal
5047 value on some targets.
5049 For example, on HP-UX if you start gdb, and before running the
5050 inferior you try to set a breakpoint on a shared library function
5051 "foo" where the inferior doesn't call "foo" directly but does
5052 pass its address to another function call, then we do find a
5053 minimal symbol for the "foo", but it's address is invalid.
5054 (Appears to be an index into a table that the loader sets up
5055 when the inferior is run.)
5057 Give the target a chance to bless sals.sals[i].pc before we
5058 try to make a breakpoint for it. */
5059 #ifdef DEPRECATED_PC_REQUIRES_RUN_BEFORE_USE
5060 if (DEPRECATED_PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
5062 if (address
== NULL
)
5063 error (_("Cannot break without a running program."));
5065 error (_("Cannot break on %s without a running program."),
5073 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5075 struct captured_parse_breakpoint_args
*args
= data
;
5077 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5078 args
->not_found_ptr
);
5081 /* Set a breakpoint according to ARG (function, linenum or *address)
5082 flag: first bit : 0 non-temporary, 1 temporary.
5083 second bit : 0 normal breakpoint, 1 hardware breakpoint.
5085 PENDING_BP is non-NULL when this function is being called to resolve
5086 a pending breakpoint. */
5089 break_command_1 (char *arg
, int flag
, int from_tty
, struct breakpoint
*pending_bp
)
5092 int tempflag
, hardwareflag
;
5093 struct symtabs_and_lines sals
;
5094 struct expression
**cond
= 0;
5095 struct symtab_and_line pending_sal
;
5096 char **cond_string
= (char **) NULL
;
5099 char *addr_start
= arg
;
5101 struct cleanup
*old_chain
;
5102 struct cleanup
*breakpoint_chain
= NULL
;
5103 struct captured_parse_breakpoint_args parse_args
;
5107 int ignore_count
= 0;
5110 hardwareflag
= flag
& BP_HARDWAREFLAG
;
5111 tempflag
= flag
& BP_TEMPFLAG
;
5117 parse_args
.arg_p
= &arg
;
5118 parse_args
.sals_p
= &sals
;
5119 parse_args
.addr_string_p
= &addr_string
;
5120 parse_args
.not_found_ptr
= ¬_found
;
5122 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5123 &parse_args
, RETURN_MASK_ALL
);
5125 /* If caller is interested in rc value from parse, set value. */
5129 exception_print (gdb_stderr
, e
);
5134 case NOT_FOUND_ERROR
:
5135 /* If called to resolve pending breakpoint, just return
5140 exception_print (gdb_stderr
, e
);
5142 /* If pending breakpoint support is turned off, throw
5145 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5146 deprecated_throw_reason (RETURN_ERROR
);
5148 /* If pending breakpoint support is auto query and the user
5149 selects no, then simply return the error code. */
5150 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5151 !nquery ("Make breakpoint pending on future shared library load? "))
5154 /* At this point, either the user was queried about setting
5155 a pending breakpoint and selected yes, or pending
5156 breakpoint behavior is on and thus a pending breakpoint
5157 is defaulted on behalf of the user. */
5158 copy_arg
= xstrdup (addr_start
);
5159 addr_string
= ©_arg
;
5161 sals
.sals
= &pending_sal
;
5166 exception_print (gdb_stderr
, e
);
5174 /* Create a chain of things that always need to be cleaned up. */
5175 old_chain
= make_cleanup (null_cleanup
, 0);
5179 /* Make sure that all storage allocated to SALS gets freed. */
5180 make_cleanup (xfree
, sals
.sals
);
5182 /* Cleanup the addr_string array but not its contents. */
5183 make_cleanup (xfree
, addr_string
);
5186 /* Allocate space for all the cond expressions. */
5187 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5188 make_cleanup (xfree
, cond
);
5190 /* Allocate space for all the cond strings. */
5191 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5192 make_cleanup (xfree
, cond_string
);
5194 /* ----------------------------- SNIP -----------------------------
5195 Anything added to the cleanup chain beyond this point is assumed
5196 to be part of a breakpoint. If the breakpoint create succeeds
5197 then the memory is not reclaimed. */
5198 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5200 /* Mark the contents of the addr_string for cleanup. These go on
5201 the breakpoint_chain and only occure if the breakpoint create
5203 for (i
= 0; i
< sals
.nelts
; i
++)
5205 if (addr_string
[i
] != NULL
)
5206 make_cleanup (xfree
, addr_string
[i
]);
5209 /* Resolve all line numbers to PC's and verify that the addresses
5210 are ok for the target. */
5212 breakpoint_sals_to_pc (&sals
, addr_start
);
5214 /* Verify that condition can be parsed, before setting any
5215 breakpoints. Allocate a separate condition expression for each
5217 thread
= -1; /* No specific thread yet */
5220 for (i
= 0; i
< sals
.nelts
; i
++)
5227 char *cond_start
= NULL
;
5228 char *cond_end
= NULL
;
5229 while (*tok
== ' ' || *tok
== '\t')
5234 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5237 toklen
= end_tok
- tok
;
5239 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5241 tok
= cond_start
= end_tok
+ 1;
5242 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
),
5244 make_cleanup (xfree
, cond
[i
]);
5246 cond_string
[i
] = savestring (cond_start
,
5247 cond_end
- cond_start
);
5248 make_cleanup (xfree
, cond_string
[i
]);
5250 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5256 thread
= strtol (tok
, &tok
, 0);
5258 error (_("Junk after thread keyword."));
5259 if (!valid_thread_id (thread
))
5260 error (_("Unknown thread %d."), thread
);
5263 error (_("Junk at end of arguments."));
5266 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5267 hardwareflag
? bp_hardware_breakpoint
5269 tempflag
? disp_del
: disp_donttouch
,
5270 thread
, ignore_count
, from_tty
,
5275 struct symtab_and_line sal
;
5276 struct breakpoint
*b
;
5281 make_cleanup (xfree
, copy_arg
);
5283 b
= set_raw_breakpoint (sal
, hardwareflag
? bp_hardware_breakpoint
5285 set_breakpoint_count (breakpoint_count
+ 1);
5286 b
->number
= breakpoint_count
;
5289 b
->addr_string
= *addr_string
;
5290 b
->cond_string
= *cond_string
;
5291 b
->ignore_count
= ignore_count
;
5293 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5294 b
->from_tty
= from_tty
;
5300 warning (_("Multiple breakpoints were set.\n"
5301 "Use the \"delete\" command to delete unwanted breakpoints."));
5302 /* That's it. Discard the cleanups for data inserted into the
5304 discard_cleanups (breakpoint_chain
);
5305 /* But cleanup everything else. */
5306 do_cleanups (old_chain
);
5311 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
5312 linenum or *address) with COND and IGNORE_COUNT. */
5314 struct captured_breakpoint_args
5325 do_captured_breakpoint (struct ui_out
*uiout
, void *data
)
5327 struct captured_breakpoint_args
*args
= data
;
5328 struct symtabs_and_lines sals
;
5329 struct expression
**cond
;
5330 struct cleanup
*old_chain
;
5331 struct cleanup
*breakpoint_chain
= NULL
;
5338 /* Parse the source and lines spec. Delay check that the expression
5339 didn't contain trailing garbage until after cleanups are in
5343 address_end
= args
->address
;
5345 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
, 0);
5350 /* Create a chain of things at always need to be cleaned up. */
5351 old_chain
= make_cleanup (null_cleanup
, 0);
5353 /* Always have a addr_string array, even if it is empty. */
5354 make_cleanup (xfree
, addr_string
);
5356 /* Make sure that all storage allocated to SALS gets freed. */
5357 make_cleanup (xfree
, sals
.sals
);
5359 /* Allocate space for all the cond expressions. */
5360 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5361 make_cleanup (xfree
, cond
);
5363 /* Allocate space for all the cond strings. */
5364 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5365 make_cleanup (xfree
, cond_string
);
5367 /* ----------------------------- SNIP -----------------------------
5368 Anything added to the cleanup chain beyond this point is assumed
5369 to be part of a breakpoint. If the breakpoint create goes
5370 through then that memory is not cleaned up. */
5371 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5373 /* Mark the contents of the addr_string for cleanup. These go on
5374 the breakpoint_chain and only occure if the breakpoint create
5376 for (i
= 0; i
< sals
.nelts
; i
++)
5378 if (addr_string
[i
] != NULL
)
5379 make_cleanup (xfree
, addr_string
[i
]);
5382 /* Wait until now before checking for garbage at the end of the
5383 address. That way cleanups can take care of freeing any
5385 if (*address_end
!= '\0')
5386 error (_("Garbage %s following breakpoint address"), address_end
);
5388 /* Resolve all line numbers to PC's. */
5389 breakpoint_sals_to_pc (&sals
, args
->address
);
5391 /* Verify that conditions can be parsed, before setting any
5393 for (i
= 0; i
< sals
.nelts
; i
++)
5395 if (args
->condition
!= NULL
)
5397 char *tok
= args
->condition
;
5398 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
5400 error (_("Garbage %s follows condition"), tok
);
5401 make_cleanup (xfree
, cond
[i
]);
5402 cond_string
[i
] = xstrdup (args
->condition
);
5406 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5407 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5408 args
->tempflag
? disp_del
: disp_donttouch
,
5409 args
->thread
, args
->ignore_count
, 0/*from-tty*/,
5410 NULL
/*pending_bp*/);
5412 /* That's it. Discard the cleanups for data inserted into the
5414 discard_cleanups (breakpoint_chain
);
5415 /* But cleanup everything else. */
5416 do_cleanups (old_chain
);
5421 gdb_breakpoint (char *address
, char *condition
,
5422 int hardwareflag
, int tempflag
,
5423 int thread
, int ignore_count
,
5424 char **error_message
)
5426 struct captured_breakpoint_args args
;
5427 args
.address
= address
;
5428 args
.condition
= condition
;
5429 args
.hardwareflag
= hardwareflag
;
5430 args
.tempflag
= tempflag
;
5431 args
.thread
= thread
;
5432 args
.ignore_count
= ignore_count
;
5433 return catch_exceptions_with_msg (uiout
, do_captured_breakpoint
, &args
,
5434 error_message
, RETURN_MASK_ALL
);
5438 /* Helper function for break_command_1 and disassemble_command. */
5441 resolve_sal_pc (struct symtab_and_line
*sal
)
5445 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5447 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5448 error (_("No line %d in file \"%s\"."),
5449 sal
->line
, sal
->symtab
->filename
);
5453 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5455 struct blockvector
*bv
;
5460 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5463 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5464 sym
= block_function (b
);
5467 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5468 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5472 /* It really is worthwhile to have the section, so we'll just
5473 have to look harder. This case can be executed if we have
5474 line numbers but no functions (as can happen in assembly
5477 struct minimal_symbol
*msym
;
5479 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5481 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5488 break_command (char *arg
, int from_tty
)
5490 break_command_1 (arg
, 0, from_tty
, NULL
);
5494 tbreak_command (char *arg
, int from_tty
)
5496 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
, NULL
);
5500 hbreak_command (char *arg
, int from_tty
)
5502 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
, NULL
);
5506 thbreak_command (char *arg
, int from_tty
)
5508 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
, NULL
);
5512 stop_command (char *arg
, int from_tty
)
5514 printf_filtered ("Specify the type of breakpoint to set.\n\
5515 Usage: stop in <function | address>\n\
5520 stopin_command (char *arg
, int from_tty
)
5524 if (arg
== (char *) NULL
)
5526 else if (*arg
!= '*')
5531 /* look for a ':'. If this is a line number specification, then
5532 say it is bad, otherwise, it should be an address or
5533 function/method name */
5534 while (*argptr
&& !hasColon
)
5536 hasColon
= (*argptr
== ':');
5541 badInput
= (*argptr
!= ':'); /* Not a class::method */
5543 badInput
= isdigit (*arg
); /* a simple line number */
5547 printf_filtered ("Usage: stop in <function | address>\n");
5549 break_command_1 (arg
, 0, from_tty
, NULL
);
5553 stopat_command (char *arg
, int from_tty
)
5557 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5564 /* look for a ':'. If there is a '::' then get out, otherwise
5565 it is probably a line number. */
5566 while (*argptr
&& !hasColon
)
5568 hasColon
= (*argptr
== ':');
5573 badInput
= (*argptr
== ':'); /* we have class::method */
5575 badInput
= !isdigit (*arg
); /* not a line number */
5579 printf_filtered ("Usage: stop at <line>\n");
5581 break_command_1 (arg
, 0, from_tty
, NULL
);
5584 /* accessflag: hw_write: watch write,
5585 hw_read: watch read,
5586 hw_access: watch access (read or write) */
5588 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5590 struct breakpoint
*b
;
5591 struct symtab_and_line sal
;
5592 struct expression
*exp
;
5593 struct block
*exp_valid_block
;
5594 struct value
*val
, *mark
;
5595 struct frame_info
*frame
;
5596 struct frame_info
*prev_frame
= NULL
;
5597 char *exp_start
= NULL
;
5598 char *exp_end
= NULL
;
5599 char *tok
, *end_tok
;
5601 char *cond_start
= NULL
;
5602 char *cond_end
= NULL
;
5603 struct expression
*cond
= NULL
;
5604 int i
, other_type_used
, target_resources_ok
= 0;
5605 enum bptype bp_type
;
5608 init_sal (&sal
); /* initialize to zeroes */
5610 /* Parse arguments. */
5611 innermost_block
= NULL
;
5613 exp
= parse_exp_1 (&arg
, 0, 0);
5615 exp_valid_block
= innermost_block
;
5616 mark
= value_mark ();
5617 val
= evaluate_expression (exp
);
5618 release_value (val
);
5619 if (value_lazy (val
))
5620 value_fetch_lazy (val
);
5623 while (*tok
== ' ' || *tok
== '\t')
5627 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5630 toklen
= end_tok
- tok
;
5631 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5633 tok
= cond_start
= end_tok
+ 1;
5634 cond
= parse_exp_1 (&tok
, 0, 0);
5638 error (_("Junk at end of command."));
5640 if (accessflag
== hw_read
)
5641 bp_type
= bp_read_watchpoint
;
5642 else if (accessflag
== hw_access
)
5643 bp_type
= bp_access_watchpoint
;
5645 bp_type
= bp_hardware_watchpoint
;
5647 mem_cnt
= can_use_hardware_watchpoint (val
);
5648 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5649 error (_("Expression cannot be implemented with read/access watchpoint."));
5652 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5653 target_resources_ok
=
5654 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5656 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5657 error (_("Target does not support this type of hardware watchpoint."));
5659 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5660 error (_("Target can only support one kind of HW watchpoint at a time."));
5663 #if defined(HPUXHPPA)
5664 /* On HP-UX if you set a h/w
5665 watchpoint before the "run" command, the inferior dies with a e.g.,
5666 SIGILL once you start it. I initially believed this was due to a
5667 bad interaction between page protection traps and the initial
5668 startup sequence by the dynamic linker.
5670 However, I tried avoiding that by having HP-UX's implementation of
5671 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5672 yet, which forced slow watches before a "run" or "attach", and it
5673 still fails somewhere in the startup code.
5675 Until I figure out what's happening, I'm disallowing watches altogether
5676 before the "run" or "attach" command. We'll tell the user they must
5677 set watches after getting the program started. */
5678 if (!target_has_execution
)
5680 warning (_("can't do that without a running program; try \"break main\"), \"run\" first");
5683 #endif /* HPUXHPPA */
5685 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5686 watchpoint could not be set. */
5687 if (!mem_cnt
|| target_resources_ok
<= 0)
5688 bp_type
= bp_watchpoint
;
5690 /* Now set up the breakpoint. */
5691 b
= set_raw_breakpoint (sal
, bp_type
);
5692 set_breakpoint_count (breakpoint_count
+ 1);
5693 b
->number
= breakpoint_count
;
5694 b
->disposition
= disp_donttouch
;
5696 b
->exp_valid_block
= exp_valid_block
;
5697 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5701 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5705 frame
= block_innermost_frame (exp_valid_block
);
5708 prev_frame
= get_prev_frame (frame
);
5709 b
->watchpoint_frame
= get_frame_id (frame
);
5713 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5716 /* If the expression is "local", then set up a "watchpoint scope"
5717 breakpoint at the point where we've left the scope of the watchpoint
5719 if (innermost_block
)
5723 struct breakpoint
*scope_breakpoint
;
5724 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5725 bp_watchpoint_scope
);
5727 scope_breakpoint
->enable_state
= bp_enabled
;
5729 /* Automatically delete the breakpoint when it hits. */
5730 scope_breakpoint
->disposition
= disp_del
;
5732 /* Only break in the proper frame (help with recursion). */
5733 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5735 /* Set the address at which we will stop. */
5736 scope_breakpoint
->loc
->requested_address
5737 = get_frame_pc (prev_frame
);
5738 scope_breakpoint
->loc
->address
5739 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
5740 scope_breakpoint
->type
);
5742 /* The scope breakpoint is related to the watchpoint. We
5743 will need to act on them together. */
5744 b
->related_breakpoint
= scope_breakpoint
;
5747 value_free_to_mark (mark
);
5751 /* Return count of locations need to be watched and can be handled
5752 in hardware. If the watchpoint can not be handled
5753 in hardware return zero. */
5755 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5756 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5757 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5761 can_use_hardware_watchpoint (struct value
*v
)
5763 int found_memory_cnt
= 0;
5764 struct value
*head
= v
;
5766 /* Did the user specifically forbid us to use hardware watchpoints? */
5767 if (!can_use_hw_watchpoints
)
5770 /* Make sure that the value of the expression depends only upon
5771 memory contents, and values computed from them within GDB. If we
5772 find any register references or function calls, we can't use a
5773 hardware watchpoint.
5775 The idea here is that evaluating an expression generates a series
5776 of values, one holding the value of every subexpression. (The
5777 expression a*b+c has five subexpressions: a, b, a*b, c, and
5778 a*b+c.) GDB's values hold almost enough information to establish
5779 the criteria given above --- they identify memory lvalues,
5780 register lvalues, computed values, etcetera. So we can evaluate
5781 the expression, and then scan the chain of values that leaves
5782 behind to decide whether we can detect any possible change to the
5783 expression's final value using only hardware watchpoints.
5785 However, I don't think that the values returned by inferior
5786 function calls are special in any way. So this function may not
5787 notice that an expression involving an inferior function call
5788 can't be watched with hardware watchpoints. FIXME. */
5789 for (; v
; v
= value_next (v
))
5791 if (VALUE_LVAL (v
) == lval_memory
)
5794 /* A lazy memory lvalue is one that GDB never needed to fetch;
5795 we either just used its address (e.g., `a' in `a.b') or
5796 we never needed it at all (e.g., `a' in `a,b'). */
5800 /* Ahh, memory we actually used! Check if we can cover
5801 it with hardware watchpoints. */
5802 struct type
*vtype
= check_typedef (value_type (v
));
5804 /* We only watch structs and arrays if user asked for it
5805 explicitly, never if they just happen to appear in a
5806 middle of some value chain. */
5808 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5809 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5811 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
5812 int len
= TYPE_LENGTH (value_type (v
));
5814 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5821 else if (VALUE_LVAL (v
) != not_lval
5822 && deprecated_value_modifiable (v
) == 0)
5823 return 0; /* ??? What does this represent? */
5824 else if (VALUE_LVAL (v
) == lval_register
)
5825 return 0; /* cannot watch a register with a HW watchpoint */
5828 /* The expression itself looks suitable for using a hardware
5829 watchpoint, but give the target machine a chance to reject it. */
5830 return found_memory_cnt
;
5834 watch_command_wrapper (char *arg
, int from_tty
)
5836 watch_command (arg
, from_tty
);
5840 watch_command (char *arg
, int from_tty
)
5842 watch_command_1 (arg
, hw_write
, from_tty
);
5846 rwatch_command_wrapper (char *arg
, int from_tty
)
5848 rwatch_command (arg
, from_tty
);
5852 rwatch_command (char *arg
, int from_tty
)
5854 watch_command_1 (arg
, hw_read
, from_tty
);
5858 awatch_command_wrapper (char *arg
, int from_tty
)
5860 awatch_command (arg
, from_tty
);
5864 awatch_command (char *arg
, int from_tty
)
5866 watch_command_1 (arg
, hw_access
, from_tty
);
5870 /* Helper routines for the until_command routine in infcmd.c. Here
5871 because it uses the mechanisms of breakpoints. */
5873 /* This function is called by fetch_inferior_event via the
5874 cmd_continuation pointer, to complete the until command. It takes
5875 care of cleaning up the temporary breakpoints set up by the until
5878 until_break_command_continuation (struct continuation_arg
*arg
)
5880 struct cleanup
*cleanups
;
5882 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5883 do_exec_cleanups (cleanups
);
5887 until_break_command (char *arg
, int from_tty
, int anywhere
)
5889 struct symtabs_and_lines sals
;
5890 struct symtab_and_line sal
;
5891 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
5892 struct breakpoint
*breakpoint
;
5893 struct cleanup
*old_chain
;
5894 struct continuation_arg
*arg1
;
5897 clear_proceed_status ();
5899 /* Set a breakpoint where the user wants it and at return from
5902 if (default_breakpoint_valid
)
5903 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5904 default_breakpoint_line
, (char ***) NULL
, NULL
);
5906 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5907 0, (char ***) NULL
, NULL
);
5909 if (sals
.nelts
!= 1)
5910 error (_("Couldn't get information on specified line."));
5913 xfree (sals
.sals
); /* malloc'd, so freed */
5916 error (_("Junk at end of arguments."));
5918 resolve_sal_pc (&sal
);
5921 /* If the user told us to continue until a specified location,
5922 we don't specify a frame at which we need to stop. */
5923 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
5925 /* Otherwise, specify the current frame, because we want to stop only
5926 at the very same frame. */
5927 breakpoint
= set_momentary_breakpoint (sal
,
5928 get_frame_id (deprecated_selected_frame
),
5931 if (!target_can_async_p ())
5932 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5934 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5936 /* If we are running asynchronously, and the target supports async
5937 execution, we are not waiting for the target to stop, in the call
5938 tp proceed, below. This means that we cannot delete the
5939 brekpoints until the target has actually stopped. The only place
5940 where we get a chance to do that is in fetch_inferior_event, so
5941 we must set things up for that. */
5943 if (target_can_async_p ())
5945 /* In this case the arg for the continuation is just the point
5946 in the exec_cleanups chain from where to start doing
5947 cleanups, because all the continuation does is the cleanups in
5948 the exec_cleanup_chain. */
5950 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5952 arg1
->data
.pointer
= old_chain
;
5954 add_continuation (until_break_command_continuation
, arg1
);
5957 /* Keep within the current frame, or in frames called by the current
5961 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
5962 sal
.pc
= get_frame_pc (prev_frame
);
5963 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
5965 if (!target_can_async_p ())
5966 make_cleanup_delete_breakpoint (breakpoint
);
5968 make_exec_cleanup_delete_breakpoint (breakpoint
);
5971 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
5972 /* Do the cleanups now, anly if we are not running asynchronously,
5973 of if we are, but the target is still synchronous. */
5974 if (!target_can_async_p ())
5975 do_cleanups (old_chain
);
5979 ep_skip_leading_whitespace (char **s
)
5981 if ((s
== NULL
) || (*s
== NULL
))
5983 while (isspace (**s
))
5987 /* This function examines a string, and attempts to find a token
5988 that might be an event name in the leading characters. If a
5989 possible match is found, a pointer to the last character of
5990 the token is returned. Else, NULL is returned. */
5993 ep_find_event_name_end (char *arg
)
5996 char *event_name_end
= NULL
;
5998 /* If we could depend upon the presense of strrpbrk, we'd use that... */
6002 /* We break out of the loop when we find a token delimiter.
6003 Basically, we're looking for alphanumerics and underscores;
6004 anything else delimites the token. */
6007 if (!isalnum (*s
) && (*s
!= '_'))
6013 return event_name_end
;
6017 /* This function attempts to parse an optional "if <cond>" clause
6018 from the arg string. If one is not found, it returns NULL.
6020 Else, it returns a pointer to the condition string. (It does not
6021 attempt to evaluate the string against a particular block.) And,
6022 it updates arg to point to the first character following the parsed
6023 if clause in the arg string. */
6026 ep_parse_optional_if_clause (char **arg
)
6030 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6033 /* Skip the "if" keyword. */
6036 /* Skip any extra leading whitespace, and record the start of the
6037 condition string. */
6038 ep_skip_leading_whitespace (arg
);
6041 /* Assume that the condition occupies the remainder of the arg string. */
6042 (*arg
) += strlen (cond_string
);
6047 /* This function attempts to parse an optional filename from the arg
6048 string. If one is not found, it returns NULL.
6050 Else, it returns a pointer to the parsed filename. (This function
6051 makes no attempt to verify that a file of that name exists, or is
6052 accessible.) And, it updates arg to point to the first character
6053 following the parsed filename in the arg string.
6055 Note that clients needing to preserve the returned filename for
6056 future access should copy it to their own buffers. */
6058 ep_parse_optional_filename (char **arg
)
6060 static char filename
[1024];
6065 if ((*arg_p
== '\0') || isspace (*arg_p
))
6083 /* Commands to deal with catching events, such as signals, exceptions,
6084 process start/exit, etc. */
6088 catch_fork
, catch_vfork
6093 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6096 char *cond_string
= NULL
;
6098 ep_skip_leading_whitespace (&arg
);
6100 /* The allowed syntax is:
6102 catch [v]fork if <cond>
6104 First, check if there's an if clause. */
6105 cond_string
= ep_parse_optional_if_clause (&arg
);
6107 if ((*arg
!= '\0') && !isspace (*arg
))
6108 error (_("Junk at end of arguments."));
6110 /* If this target supports it, create a fork or vfork catchpoint
6111 and enable reporting of such events. */
6115 create_fork_event_catchpoint (tempflag
, cond_string
);
6118 create_vfork_event_catchpoint (tempflag
, cond_string
);
6121 error (_("unsupported or unknown fork kind; cannot catch it"));
6127 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6129 char *cond_string
= NULL
;
6131 ep_skip_leading_whitespace (&arg
);
6133 /* The allowed syntax is:
6135 catch exec if <cond>
6137 First, check if there's an if clause. */
6138 cond_string
= ep_parse_optional_if_clause (&arg
);
6140 if ((*arg
!= '\0') && !isspace (*arg
))
6141 error (_("Junk at end of arguments."));
6143 /* If this target supports it, create an exec catchpoint
6144 and enable reporting of such events. */
6145 create_exec_event_catchpoint (tempflag
, cond_string
);
6149 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6151 char *dll_pathname
= NULL
;
6152 char *cond_string
= NULL
;
6154 ep_skip_leading_whitespace (&arg
);
6156 /* The allowed syntax is:
6158 catch load if <cond>
6159 catch load <filename>
6160 catch load <filename> if <cond>
6162 The user is not allowed to specify the <filename> after an
6165 We'll ignore the pathological case of a file named "if".
6167 First, check if there's an if clause. If so, then there
6168 cannot be a filename. */
6169 cond_string
= ep_parse_optional_if_clause (&arg
);
6171 /* If there was an if clause, then there cannot be a filename.
6172 Else, there might be a filename and an if clause. */
6173 if (cond_string
== NULL
)
6175 dll_pathname
= ep_parse_optional_filename (&arg
);
6176 ep_skip_leading_whitespace (&arg
);
6177 cond_string
= ep_parse_optional_if_clause (&arg
);
6180 if ((*arg
!= '\0') && !isspace (*arg
))
6181 error (_("Junk at end of arguments."));
6183 /* Create a load breakpoint that only triggers when a load of
6184 the specified dll (or any dll, if no pathname was specified)
6186 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6187 dll_pathname
, cond_string
);
6191 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6193 char *dll_pathname
= NULL
;
6194 char *cond_string
= NULL
;
6196 ep_skip_leading_whitespace (&arg
);
6198 /* The allowed syntax is:
6200 catch unload if <cond>
6201 catch unload <filename>
6202 catch unload <filename> if <cond>
6204 The user is not allowed to specify the <filename> after an
6207 We'll ignore the pathological case of a file named "if".
6209 First, check if there's an if clause. If so, then there
6210 cannot be a filename. */
6211 cond_string
= ep_parse_optional_if_clause (&arg
);
6213 /* If there was an if clause, then there cannot be a filename.
6214 Else, there might be a filename and an if clause. */
6215 if (cond_string
== NULL
)
6217 dll_pathname
= ep_parse_optional_filename (&arg
);
6218 ep_skip_leading_whitespace (&arg
);
6219 cond_string
= ep_parse_optional_if_clause (&arg
);
6222 if ((*arg
!= '\0') && !isspace (*arg
))
6223 error (_("Junk at end of arguments."));
6225 /* Create an unload breakpoint that only triggers when an unload of
6226 the specified dll (or any dll, if no pathname was specified)
6228 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6229 dll_pathname
, cond_string
);
6232 /* Commands to deal with catching exceptions. */
6234 /* Set a breakpoint at the specified callback routine for an
6235 exception event callback */
6238 create_exception_catchpoint (int tempflag
, char *cond_string
,
6239 enum exception_event_kind ex_event
,
6240 struct symtab_and_line
*sal
)
6242 struct breakpoint
*b
;
6243 int thread
= -1; /* All threads. */
6246 if (!sal
) /* no exception support? */
6251 case EX_EVENT_THROW
:
6252 bptype
= bp_catch_throw
;
6254 case EX_EVENT_CATCH
:
6255 bptype
= bp_catch_catch
;
6257 default: /* error condition */
6258 error (_("Internal error -- invalid catchpoint kind"));
6261 b
= set_raw_breakpoint (*sal
, bptype
);
6262 set_breakpoint_count (breakpoint_count
+ 1);
6263 b
->number
= breakpoint_count
;
6265 b
->cond_string
= (cond_string
== NULL
) ?
6266 NULL
: savestring (cond_string
, strlen (cond_string
));
6268 b
->addr_string
= NULL
;
6269 b
->enable_state
= bp_enabled
;
6270 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6274 static enum print_stop_action
6275 print_exception_catchpoint (struct breakpoint
*b
)
6277 annotate_catchpoint (b
->number
);
6279 if (strstr (b
->addr_string
, "throw") != NULL
)
6280 printf_filtered ("\nCatchpoint %d (exception thrown)\n",
6283 printf_filtered ("\nCatchpoint %d (exception caught)\n",
6286 return PRINT_SRC_AND_LOC
;
6290 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6295 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6298 *last_addr
= b
->loc
->address
;
6299 if (strstr (b
->addr_string
, "throw") != NULL
)
6300 ui_out_field_string (uiout
, "what", "exception throw");
6302 ui_out_field_string (uiout
, "what", "exception catch");
6306 print_mention_exception_catchpoint (struct breakpoint
*b
)
6308 if (strstr (b
->addr_string
, "throw") != NULL
)
6309 printf_filtered ("Catchpoint %d (throw)", b
->number
);
6311 printf_filtered ("Catchpoint %d (catch)", b
->number
);
6314 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6315 print_exception_catchpoint
,
6316 print_one_exception_catchpoint
,
6317 print_mention_exception_catchpoint
6321 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6322 enum exception_event_kind ex_event
, int from_tty
)
6324 char *trigger_func_name
, *nameptr
;
6325 struct symtabs_and_lines sals
;
6326 struct breakpoint
*b
;
6328 if (ex_event
== EX_EVENT_CATCH
)
6329 trigger_func_name
= xstrdup ("__cxa_begin_catch");
6331 trigger_func_name
= xstrdup ("__cxa_throw");
6333 nameptr
= trigger_func_name
;
6334 sals
= decode_line_1 (&nameptr
, 1, NULL
, 0, NULL
, NULL
);
6335 if (sals
.nelts
== 0)
6337 xfree (trigger_func_name
);
6341 b
= set_raw_breakpoint (sals
.sals
[0], bp_breakpoint
);
6342 set_breakpoint_count (breakpoint_count
+ 1);
6343 b
->number
= breakpoint_count
;
6345 b
->cond_string
= (cond_string
== NULL
) ?
6346 NULL
: savestring (cond_string
, strlen (cond_string
));
6348 b
->addr_string
= trigger_func_name
;
6349 b
->enable_state
= bp_enabled
;
6350 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6351 b
->ops
= &gnu_v3_exception_catchpoint_ops
;
6358 /* Deal with "catch catch" and "catch throw" commands */
6361 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6362 int tempflag
, int from_tty
)
6364 char *cond_string
= NULL
;
6365 struct symtab_and_line
*sal
= NULL
;
6367 ep_skip_leading_whitespace (&arg
);
6369 cond_string
= ep_parse_optional_if_clause (&arg
);
6371 if ((*arg
!= '\0') && !isspace (*arg
))
6372 error (_("Junk at end of arguments."));
6374 if ((ex_event
!= EX_EVENT_THROW
) &&
6375 (ex_event
!= EX_EVENT_CATCH
))
6376 error (_("Unsupported or unknown exception event; cannot catch it"));
6378 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6381 /* See if we can find a callback routine */
6382 sal
= target_enable_exception_callback (ex_event
, 1);
6386 /* We have callbacks from the runtime system for exceptions.
6387 Set a breakpoint on the sal found, if no errors */
6388 if (sal
!= (struct symtab_and_line
*) -1)
6389 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6391 return; /* something went wrong with setting up callbacks */
6394 warning (_("Unsupported with this platform/compiler combination."));
6397 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6398 inside a catch_errors */
6401 cover_target_enable_exception_callback (void *arg
)
6403 args_for_catchpoint_enable
*args
= arg
;
6404 struct symtab_and_line
*sal
;
6405 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6408 else if (sal
== (struct symtab_and_line
*) -1)
6411 return 1; /*is valid */
6415 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6418 /* The first argument may be an event name, such as "start" or "load".
6419 If so, then handle it as such. If it doesn't match an event name,
6420 then attempt to interpret it as an exception name. (This latter is
6421 the v4.16-and-earlier GDB meaning of the "catch" command.)
6423 First, try to find the bounds of what might be an event name. */
6424 char *arg1_start
= arg
;
6428 if (arg1_start
== NULL
)
6430 /* Old behaviour was to use pre-v-4.16 syntax */
6431 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6433 /* Now, this is not allowed */
6434 error (_("Catch requires an event name."));
6437 arg1_end
= ep_find_event_name_end (arg1_start
);
6438 if (arg1_end
== NULL
)
6439 error (_("catch requires an event"));
6440 arg1_length
= arg1_end
+ 1 - arg1_start
;
6442 /* Try to match what we found against known event names. */
6443 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6445 error (_("Catch of signal not yet implemented"));
6447 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6449 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6450 tempflag
, from_tty
);
6452 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6454 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6455 tempflag
, from_tty
);
6457 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6459 error (_("Catch of thread_start not yet implemented"));
6461 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6463 error (_("Catch of thread_exit not yet implemented"));
6465 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6467 error (_("Catch of thread_join not yet implemented"));
6469 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6471 error (_("Catch of start not yet implemented"));
6473 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6475 error (_("Catch of exit not yet implemented"));
6477 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6479 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6481 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6483 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6485 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6487 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6489 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6491 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6493 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6495 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6497 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6499 error (_("Catch of stop not yet implemented"));
6502 /* This doesn't appear to be an event name */
6506 /* Pre-v.4.16 behaviour was to treat the argument
6507 as the name of an exception */
6508 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6509 /* Now this is not allowed */
6510 error (_("Unknown event kind specified for catch"));
6515 /* Used by the gui, could be made a worker for other things. */
6518 set_breakpoint_sal (struct symtab_and_line sal
)
6520 struct breakpoint
*b
;
6521 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6522 set_breakpoint_count (breakpoint_count
+ 1);
6523 b
->number
= breakpoint_count
;
6530 catch_command (char *arg
, int from_tty
)
6532 catch_command_1 (arg
, 0, from_tty
);
6537 tcatch_command (char *arg
, int from_tty
)
6539 catch_command_1 (arg
, 1, from_tty
);
6542 /* Delete breakpoints by address or line. */
6545 clear_command (char *arg
, int from_tty
)
6547 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6549 struct symtabs_and_lines sals
;
6550 struct symtab_and_line sal
;
6555 sals
= decode_line_spec (arg
, 1);
6560 sals
.sals
= (struct symtab_and_line
*)
6561 xmalloc (sizeof (struct symtab_and_line
));
6562 make_cleanup (xfree
, sals
.sals
);
6563 init_sal (&sal
); /* initialize to zeroes */
6564 sal
.line
= default_breakpoint_line
;
6565 sal
.symtab
= default_breakpoint_symtab
;
6566 sal
.pc
= default_breakpoint_address
;
6567 if (sal
.symtab
== 0)
6568 error (_("No source file specified."));
6576 /* For each line spec given, delete bps which correspond
6577 to it. Do it in two passes, solely to preserve the current
6578 behavior that from_tty is forced true if we delete more than
6582 for (i
= 0; i
< sals
.nelts
; i
++)
6584 /* If exact pc given, clear bpts at that pc.
6585 If line given (pc == 0), clear all bpts on specified line.
6586 If defaulting, clear all bpts on default line
6589 defaulting sal.pc != 0 tests to do
6594 1 0 <can't happen> */
6599 /* Find all matching breakpoints, remove them from the
6600 breakpoint chain, and add them to the 'found' chain. */
6601 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6603 /* Are we going to delete b? */
6604 if (b
->type
!= bp_none
6605 && b
->type
!= bp_watchpoint
6606 && b
->type
!= bp_hardware_watchpoint
6607 && b
->type
!= bp_read_watchpoint
6608 && b
->type
!= bp_access_watchpoint
6609 /* Not if b is a watchpoint of any sort... */
6610 && (((sal
.pc
&& (b
->loc
->address
== sal
.pc
))
6611 && (!section_is_overlay (b
->loc
->section
)
6612 || b
->loc
->section
== sal
.section
))
6613 /* Yes, if sal.pc matches b (modulo overlays). */
6614 || ((default_match
|| (0 == sal
.pc
))
6615 && b
->source_file
!= NULL
6616 && sal
.symtab
!= NULL
6617 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6618 && b
->line_number
== sal
.line
)))
6619 /* Yes, if sal source file and line matches b. */
6621 /* Remove it from breakpoint_chain... */
6622 if (b
== breakpoint_chain
)
6624 /* b is at the head of the list */
6625 breakpoint_chain
= b
->next
;
6629 prev
->next
= b
->next
;
6631 /* And add it to 'found' chain. */
6637 /* Keep b, and keep a pointer to it. */
6642 /* Now go thru the 'found' chain and delete them. */
6646 error (_("No breakpoint at %s."), arg
);
6648 error (_("No breakpoint at this line."));
6652 from_tty
= 1; /* Always report if deleted more than one */
6654 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6655 breakpoints_changed ();
6659 printf_unfiltered ("%d ", found
->number
);
6661 delete_breakpoint (found
);
6665 putchar_unfiltered ('\n');
6668 /* Delete breakpoint in BS if they are `delete' breakpoints and
6669 all breakpoints that are marked for deletion, whether hit or not.
6670 This is called after any breakpoint is hit, or after errors. */
6673 breakpoint_auto_delete (bpstat bs
)
6675 struct breakpoint
*b
, *temp
;
6677 for (; bs
; bs
= bs
->next
)
6678 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6680 delete_breakpoint (bs
->breakpoint_at
);
6682 ALL_BREAKPOINTS_SAFE (b
, temp
)
6684 if (b
->disposition
== disp_del_at_next_stop
)
6685 delete_breakpoint (b
);
6689 /* Delete a breakpoint and clean up all traces of it in the data
6693 delete_breakpoint (struct breakpoint
*bpt
)
6695 struct breakpoint
*b
;
6697 struct bp_location
*loc
;
6699 gdb_assert (bpt
!= NULL
);
6701 /* Has this bp already been deleted? This can happen because multiple
6702 lists can hold pointers to bp's. bpstat lists are especial culprits.
6704 One example of this happening is a watchpoint's scope bp. When the
6705 scope bp triggers, we notice that the watchpoint is out of scope, and
6706 delete it. We also delete its scope bp. But the scope bp is marked
6707 "auto-deleting", and is already on a bpstat. That bpstat is then
6708 checked for auto-deleting bp's, which are deleted.
6710 A real solution to this problem might involve reference counts in bp's,
6711 and/or giving them pointers back to their referencing bpstat's, and
6712 teaching delete_breakpoint to only free a bp's storage when no more
6713 references were extent. A cheaper bandaid was chosen. */
6714 if (bpt
->type
== bp_none
)
6717 if (deprecated_delete_breakpoint_hook
)
6718 deprecated_delete_breakpoint_hook (bpt
);
6719 breakpoint_delete_event (bpt
->number
);
6721 if (bpt
->loc
->inserted
)
6722 remove_breakpoint (bpt
->loc
, mark_inserted
);
6724 free_valchain (bpt
->loc
);
6726 if (breakpoint_chain
== bpt
)
6727 breakpoint_chain
= bpt
->next
;
6729 if (bp_location_chain
== bpt
->loc
)
6730 bp_location_chain
= bpt
->loc
->next
;
6732 /* If we have callback-style exception catchpoints, don't go through
6733 the adjustments to the C++ runtime library etc. if the inferior
6734 isn't actually running. target_enable_exception_callback for a
6735 null target ops vector gives an undesirable error message, so we
6736 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6737 exceptions are supported in this way, it's OK for now. FIXME */
6738 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6740 /* Format possible error msg */
6741 char *message
= xstrprintf ("Error in deleting catchpoint %d:\n",
6743 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
6744 args_for_catchpoint_enable args
;
6745 args
.kind
= bpt
->type
== bp_catch_catch
?
6746 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6748 catch_errors (cover_target_enable_exception_callback
, &args
,
6749 message
, RETURN_MASK_ALL
);
6750 do_cleanups (cleanups
);
6757 b
->next
= bpt
->next
;
6761 ALL_BP_LOCATIONS (loc
)
6762 if (loc
->next
== bpt
->loc
)
6764 loc
->next
= bpt
->loc
->next
;
6768 check_duplicates (bpt
);
6769 /* If this breakpoint was inserted, and there is another breakpoint
6770 at the same address, we need to insert the other breakpoint. */
6771 if (bpt
->loc
->inserted
6772 && bpt
->type
!= bp_hardware_watchpoint
6773 && bpt
->type
!= bp_read_watchpoint
6774 && bpt
->type
!= bp_access_watchpoint
6775 && bpt
->type
!= bp_catch_fork
6776 && bpt
->type
!= bp_catch_vfork
6777 && bpt
->type
!= bp_catch_exec
)
6780 if (b
->loc
->address
== bpt
->loc
->address
6781 && b
->loc
->section
== bpt
->loc
->section
6782 && !b
->loc
->duplicate
6783 && b
->enable_state
!= bp_disabled
6784 && b
->enable_state
!= bp_shlib_disabled
6786 && b
->enable_state
!= bp_call_disabled
)
6790 /* We should never reach this point if there is a permanent
6791 breakpoint at the same address as the one being deleted.
6792 If there is a permanent breakpoint somewhere, it should
6793 always be the only one inserted. */
6794 if (b
->enable_state
== bp_permanent
)
6795 internal_error (__FILE__
, __LINE__
,
6796 "another breakpoint was inserted on top of "
6797 "a permanent breakpoint");
6799 if (b
->type
== bp_hardware_breakpoint
)
6800 val
= target_insert_hw_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6802 val
= target_insert_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6804 /* If there was an error in the insert, print a message, then stop execution. */
6807 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6808 make_cleanup_ui_file_delete (tmp_error_stream
);
6811 if (b
->type
== bp_hardware_breakpoint
)
6813 fprintf_unfiltered (tmp_error_stream
,
6814 "Cannot insert hardware breakpoint %d.\n"
6815 "You may have requested too many hardware breakpoints.\n",
6820 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6821 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6822 print_address_numeric (b
->loc
->address
, 1, tmp_error_stream
);
6823 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6824 safe_strerror (val
));
6827 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6828 target_terminal_ours_for_output ();
6829 error_stream(tmp_error_stream
);
6832 b
->loc
->inserted
= 1;
6836 free_command_lines (&bpt
->commands
);
6839 if (bpt
->cond_string
!= NULL
)
6840 xfree (bpt
->cond_string
);
6841 if (bpt
->addr_string
!= NULL
)
6842 xfree (bpt
->addr_string
);
6843 if (bpt
->exp
!= NULL
)
6845 if (bpt
->exp_string
!= NULL
)
6846 xfree (bpt
->exp_string
);
6847 if (bpt
->val
!= NULL
)
6848 value_free (bpt
->val
);
6849 if (bpt
->source_file
!= NULL
)
6850 xfree (bpt
->source_file
);
6851 if (bpt
->dll_pathname
!= NULL
)
6852 xfree (bpt
->dll_pathname
);
6853 if (bpt
->triggered_dll_pathname
!= NULL
)
6854 xfree (bpt
->triggered_dll_pathname
);
6855 if (bpt
->exec_pathname
!= NULL
)
6856 xfree (bpt
->exec_pathname
);
6858 /* Be sure no bpstat's are pointing at it after it's been freed. */
6859 /* FIXME, how can we find all bpstat's?
6860 We just check stop_bpstat for now. */
6861 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6862 if (bs
->breakpoint_at
== bpt
)
6864 bs
->breakpoint_at
= NULL
;
6866 /* bs->commands will be freed later. */
6868 /* On the chance that someone will soon try again to delete this same
6869 bp, we mark it as deleted before freeing its storage. */
6870 bpt
->type
= bp_none
;
6877 do_delete_breakpoint_cleanup (void *b
)
6879 delete_breakpoint (b
);
6883 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6885 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6889 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6891 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6895 delete_command (char *arg
, int from_tty
)
6897 struct breakpoint
*b
, *temp
;
6903 int breaks_to_delete
= 0;
6905 /* Delete all breakpoints if no argument.
6906 Do not delete internal or call-dummy breakpoints, these
6907 have to be deleted with an explicit breakpoint number argument. */
6910 if (b
->type
!= bp_call_dummy
&&
6911 b
->type
!= bp_shlib_event
&&
6912 b
->type
!= bp_thread_event
&&
6913 b
->type
!= bp_overlay_event
&&
6915 breaks_to_delete
= 1;
6918 /* Ask user only if there are some breakpoints to delete. */
6920 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
6922 ALL_BREAKPOINTS_SAFE (b
, temp
)
6924 if (b
->type
!= bp_call_dummy
&&
6925 b
->type
!= bp_shlib_event
&&
6926 b
->type
!= bp_thread_event
&&
6927 b
->type
!= bp_overlay_event
&&
6929 delete_breakpoint (b
);
6934 map_breakpoint_numbers (arg
, delete_breakpoint
);
6937 /* Reset a breakpoint given it's struct breakpoint * BINT.
6938 The value we return ends up being the return value from catch_errors.
6939 Unused in this case. */
6942 breakpoint_re_set_one (void *bint
)
6944 /* get past catch_errs */
6945 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6949 int *not_found_ptr
= NULL
;
6950 struct symtabs_and_lines sals
;
6952 enum enable_state save_enable
;
6957 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
6961 case bp_hardware_breakpoint
:
6963 case bp_catch_unload
:
6964 if (b
->addr_string
== NULL
)
6966 /* Anything without a string can't be re-set. */
6967 delete_breakpoint (b
);
6970 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6972 ``And a hack it is, although Apple's Darwin version of GDB
6973 contains an almost identical hack to implement a "future
6974 break" command. It seems to work in many real world cases,
6975 but it is easy to come up with a test case where the patch
6976 doesn't help at all.''
6978 ``It seems that the way GDB implements breakpoints - in -
6979 shared - libraries was designed for a.out shared library
6980 systems (SunOS 4) where shared libraries were loaded at a
6981 fixed address in memory. Since ELF shared libraries can (and
6982 will) be loaded at any address in memory, things break.
6983 Fixing this is not trivial. Therefore, I'm not sure whether
6984 we should add this hack to the branch only. I cannot
6985 guarantee that things will be fixed on the trunk in the near
6988 In case we have a problem, disable this breakpoint. We'll
6989 restore its status if we succeed. Don't disable a
6990 shlib_disabled breakpoint though. There's a fair chance we
6991 can't re-set it if the shared library it's in hasn't been
6997 save_enable
= b
->enable_state
;
6998 if (b
->enable_state
!= bp_shlib_disabled
)
6999 b
->enable_state
= bp_disabled
;
7001 /* If resetting a shlib-disabled breakpoint, we don't want to
7002 see an error message if it is not found since we will expect
7003 this to occur until the shared library is finally reloaded.
7004 We accomplish this by giving decode_line_1 a pointer to use
7005 for silent notification that the symbol is not found. */
7006 not_found_ptr
= ¬_found
;
7008 set_language (b
->language
);
7009 input_radix
= b
->input_radix
;
7011 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7013 for (i
= 0; i
< sals
.nelts
; i
++)
7015 resolve_sal_pc (&sals
.sals
[i
]);
7017 /* Reparse conditions, they might contain references to the
7019 if (b
->cond_string
!= NULL
)
7025 /* Avoid re-freeing b->exp if an error during the call
7029 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
7032 /* We need to re-set the breakpoint if the address changes... */
7033 if (b
->loc
->address
!= sals
.sals
[i
].pc
7034 /* ...or new and old breakpoints both have source files, and
7035 the source file name or the line number changes... */
7036 || (b
->source_file
!= NULL
7037 && sals
.sals
[i
].symtab
!= NULL
7038 && (strcmp (b
->source_file
, sals
.sals
[i
].symtab
->filename
) != 0
7039 || b
->line_number
!= sals
.sals
[i
].line
)
7041 /* ...or we switch between having a source file and not having
7043 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
7046 if (b
->source_file
!= NULL
)
7047 xfree (b
->source_file
);
7048 if (sals
.sals
[i
].symtab
== NULL
)
7049 b
->source_file
= NULL
;
7052 savestring (sals
.sals
[i
].symtab
->filename
,
7053 strlen (sals
.sals
[i
].symtab
->filename
));
7054 b
->line_number
= sals
.sals
[i
].line
;
7055 b
->loc
->requested_address
= sals
.sals
[i
].pc
;
7057 = adjust_breakpoint_address (b
->loc
->requested_address
,
7060 /* Used to check for duplicates here, but that can
7061 cause trouble, as it doesn't check for disabled
7066 /* Might be better to do this just once per breakpoint_re_set,
7067 rather than once for every breakpoint. */
7068 breakpoints_changed ();
7070 b
->loc
->section
= sals
.sals
[i
].section
;
7071 b
->enable_state
= save_enable
; /* Restore it, this worked. */
7074 /* Now that this is re-enabled, check_duplicates
7076 check_duplicates (b
);
7083 case bp_hardware_watchpoint
:
7084 case bp_read_watchpoint
:
7085 case bp_access_watchpoint
:
7086 innermost_block
= NULL
;
7087 /* The issue arises of what context to evaluate this in. The
7088 same one as when it was set, but what does that mean when
7089 symbols have been re-read? We could save the filename and
7090 functionname, but if the context is more local than that, the
7091 best we could do would be something like how many levels deep
7092 and which index at that particular level, but that's going to
7093 be less stable than filenames or function names. */
7095 /* So for now, just use a global context. */
7099 /* Avoid re-freeing b->exp if an error during the call to
7100 parse_expression. */
7103 b
->exp
= parse_expression (b
->exp_string
);
7104 b
->exp_valid_block
= innermost_block
;
7105 mark
= value_mark ();
7108 value_free (b
->val
);
7109 /* Avoid re-freeing b->val if an error during the call to
7110 evaluate_expression. */
7113 b
->val
= evaluate_expression (b
->exp
);
7114 release_value (b
->val
);
7115 if (value_lazy (b
->val
) && breakpoint_enabled (b
))
7116 value_fetch_lazy (b
->val
);
7118 if (b
->cond_string
!= NULL
)
7124 /* Avoid re-freeing b->exp if an error during the call
7128 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7130 if (breakpoint_enabled (b
))
7132 value_free_to_mark (mark
);
7134 case bp_catch_catch
:
7135 case bp_catch_throw
:
7137 /* We needn't really do anything to reset these, since the mask
7138 that requests them is unaffected by e.g., new libraries being
7141 case bp_catch_vfork
:
7146 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
7148 /* Delete longjmp and overlay event breakpoints; they will be
7149 reset later by breakpoint_re_set. */
7151 case bp_longjmp_resume
:
7152 case bp_overlay_event
:
7153 delete_breakpoint (b
);
7156 /* This breakpoint is special, it's set up when the inferior
7157 starts and we really don't want to touch it. */
7158 case bp_shlib_event
:
7160 /* Like bp_shlib_event, this breakpoint type is special.
7161 Once it is set up, we do not want to touch it. */
7162 case bp_thread_event
:
7164 /* Keep temporary breakpoints, which can be encountered when we step
7165 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7166 Otherwise these should have been blown away via the cleanup chain
7167 or by breakpoint_init_inferior when we rerun the executable. */
7170 case bp_watchpoint_scope
:
7172 case bp_step_resume
:
7179 /* Re-set all breakpoints after symbols have been re-loaded. */
7181 breakpoint_re_set (void)
7183 struct breakpoint
*b
, *temp
;
7184 enum language save_language
;
7185 int save_input_radix
;
7187 save_language
= current_language
->la_language
;
7188 save_input_radix
= input_radix
;
7189 ALL_BREAKPOINTS_SAFE (b
, temp
)
7191 /* Format possible error msg */
7192 char *message
= xstrprintf ("Error in re-setting breakpoint %d:\n",
7194 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7195 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7196 do_cleanups (cleanups
);
7198 set_language (save_language
);
7199 input_radix
= save_input_radix
;
7201 if (GET_LONGJMP_TARGET_P ())
7203 create_longjmp_breakpoint ("longjmp");
7204 create_longjmp_breakpoint ("_longjmp");
7205 create_longjmp_breakpoint ("siglongjmp");
7206 create_longjmp_breakpoint ("_siglongjmp");
7207 create_longjmp_breakpoint (NULL
);
7210 create_overlay_event_breakpoint ("_ovly_debug_event");
7213 /* Reset the thread number of this breakpoint:
7215 - If the breakpoint is for all threads, leave it as-is.
7216 - Else, reset it to the current thread for inferior_ptid. */
7218 breakpoint_re_set_thread (struct breakpoint
*b
)
7220 if (b
->thread
!= -1)
7222 if (in_thread_list (inferior_ptid
))
7223 b
->thread
= pid_to_thread_id (inferior_ptid
);
7227 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7228 If from_tty is nonzero, it prints a message to that effect,
7229 which ends with a period (no newline). */
7232 set_ignore_count (int bptnum
, int count
, int from_tty
)
7234 struct breakpoint
*b
;
7240 if (b
->number
== bptnum
)
7242 b
->ignore_count
= count
;
7246 printf_filtered ("Will stop next time breakpoint %d is reached.",
7248 else if (count
== 1)
7249 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7252 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7255 breakpoints_changed ();
7256 breakpoint_modify_event (b
->number
);
7260 error (_("No breakpoint number %d."), bptnum
);
7263 /* Clear the ignore counts of all breakpoints. */
7265 breakpoint_clear_ignore_counts (void)
7267 struct breakpoint
*b
;
7270 b
->ignore_count
= 0;
7273 /* Command to set ignore-count of breakpoint N to COUNT. */
7276 ignore_command (char *args
, int from_tty
)
7282 error_no_arg ("a breakpoint number");
7284 num
= get_number (&p
);
7286 error (_("bad breakpoint number: '%s'"), args
);
7288 error (_("Second argument (specified ignore-count) is missing."));
7290 set_ignore_count (num
,
7291 longest_to_int (value_as_long (parse_and_eval (p
))),
7294 printf_filtered ("\n");
7297 /* Call FUNCTION on each of the breakpoints
7298 whose numbers are given in ARGS. */
7301 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7306 struct breakpoint
*b
, *tmp
;
7310 error_no_arg ("one or more breakpoint numbers");
7317 num
= get_number_or_range (&p1
);
7320 warning (_("bad breakpoint number at or near '%s'"), p
);
7324 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7325 if (b
->number
== num
)
7327 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7330 if (related_breakpoint
)
7331 function (related_breakpoint
);
7335 printf_unfiltered ("No breakpoint number %d.\n", num
);
7341 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7342 If from_tty is nonzero, it prints a message to that effect,
7343 which ends with a period (no newline). */
7346 disable_breakpoint (struct breakpoint
*bpt
)
7348 /* Never disable a watchpoint scope breakpoint; we want to
7349 hit them when we leave scope so we can delete both the
7350 watchpoint and its scope breakpoint at that time. */
7351 if (bpt
->type
== bp_watchpoint_scope
)
7354 /* You can't disable permanent breakpoints. */
7355 if (bpt
->enable_state
== bp_permanent
)
7358 bpt
->enable_state
= bp_disabled
;
7360 check_duplicates (bpt
);
7362 if (deprecated_modify_breakpoint_hook
)
7363 deprecated_modify_breakpoint_hook (bpt
);
7364 breakpoint_modify_event (bpt
->number
);
7368 disable_command (char *args
, int from_tty
)
7370 struct breakpoint
*bpt
;
7372 ALL_BREAKPOINTS (bpt
)
7376 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7381 case bp_catch_unload
:
7383 case bp_catch_vfork
:
7385 case bp_catch_catch
:
7386 case bp_catch_throw
:
7387 case bp_hardware_breakpoint
:
7389 case bp_hardware_watchpoint
:
7390 case bp_read_watchpoint
:
7391 case bp_access_watchpoint
:
7392 disable_breakpoint (bpt
);
7397 map_breakpoint_numbers (args
, disable_breakpoint
);
7401 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7403 int target_resources_ok
, other_type_used
;
7406 if (bpt
->type
== bp_hardware_breakpoint
)
7409 i
= hw_breakpoint_used_count ();
7410 target_resources_ok
=
7411 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7413 if (target_resources_ok
== 0)
7414 error (_("No hardware breakpoint support in the target."));
7415 else if (target_resources_ok
< 0)
7416 error (_("Hardware breakpoints used exceeds limit."));
7421 if (bpt
->enable_state
!= bp_enabled
)
7423 /* When enabling a pending breakpoint, we need to check if the breakpoint
7424 is resolvable since shared libraries could have been loaded
7425 after the breakpoint was disabled. */
7426 breakpoints_changed ();
7427 if (resolve_pending_breakpoint (bpt
) == GDB_RC_OK
)
7429 delete_breakpoint (bpt
);
7432 bpt
->enable_state
= bp_enabled
;
7433 bpt
->disposition
= disposition
;
7436 else /* Not a pending breakpoint. */
7438 if (bpt
->enable_state
!= bp_permanent
)
7439 bpt
->enable_state
= bp_enabled
;
7440 bpt
->disposition
= disposition
;
7441 check_duplicates (bpt
);
7442 breakpoints_changed ();
7444 if (bpt
->type
== bp_watchpoint
||
7445 bpt
->type
== bp_hardware_watchpoint
||
7446 bpt
->type
== bp_read_watchpoint
||
7447 bpt
->type
== bp_access_watchpoint
)
7449 struct frame_id saved_frame_id
;
7451 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
7452 if (bpt
->exp_valid_block
!= NULL
)
7454 struct frame_info
*fr
=
7455 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7459 Cannot enable watchpoint %d because the block in which its expression\n\
7460 is valid is not currently in scope.\n", bpt
->number
);
7461 bpt
->enable_state
= bp_disabled
;
7467 value_free (bpt
->val
);
7468 mark
= value_mark ();
7469 bpt
->val
= evaluate_expression (bpt
->exp
);
7470 release_value (bpt
->val
);
7471 if (value_lazy (bpt
->val
))
7472 value_fetch_lazy (bpt
->val
);
7474 if (bpt
->type
== bp_hardware_watchpoint
||
7475 bpt
->type
== bp_read_watchpoint
||
7476 bpt
->type
== bp_access_watchpoint
)
7478 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7479 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7481 /* Hack around 'unused var' error for some targets here */
7483 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7484 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7485 /* we can consider of type is bp_hardware_watchpoint, convert to
7486 bp_watchpoint in the following condition */
7487 if (target_resources_ok
< 0)
7490 Cannot enable watchpoint %d because target watch resources\n\
7491 have been allocated for other watchpoints.\n", bpt
->number
);
7492 bpt
->enable_state
= bp_disabled
;
7493 value_free_to_mark (mark
);
7498 select_frame (frame_find_by_id (saved_frame_id
));
7499 value_free_to_mark (mark
);
7503 if (deprecated_modify_breakpoint_hook
)
7504 deprecated_modify_breakpoint_hook (bpt
);
7505 breakpoint_modify_event (bpt
->number
);
7509 enable_breakpoint (struct breakpoint
*bpt
)
7511 do_enable_breakpoint (bpt
, bpt
->disposition
);
7514 /* The enable command enables the specified breakpoints (or all defined
7515 breakpoints) so they once again become (or continue to be) effective
7516 in stopping the inferior. */
7519 enable_command (char *args
, int from_tty
)
7521 struct breakpoint
*bpt
;
7523 ALL_BREAKPOINTS (bpt
)
7527 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
7532 case bp_catch_unload
:
7534 case bp_catch_vfork
:
7536 case bp_catch_catch
:
7537 case bp_catch_throw
:
7538 case bp_hardware_breakpoint
:
7540 case bp_hardware_watchpoint
:
7541 case bp_read_watchpoint
:
7542 case bp_access_watchpoint
:
7543 enable_breakpoint (bpt
);
7548 map_breakpoint_numbers (args
, enable_breakpoint
);
7552 enable_once_breakpoint (struct breakpoint
*bpt
)
7554 do_enable_breakpoint (bpt
, disp_disable
);
7558 enable_once_command (char *args
, int from_tty
)
7560 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7564 enable_delete_breakpoint (struct breakpoint
*bpt
)
7566 do_enable_breakpoint (bpt
, disp_del
);
7570 enable_delete_command (char *args
, int from_tty
)
7572 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7576 set_breakpoint_cmd (char *args
, int from_tty
)
7581 show_breakpoint_cmd (char *args
, int from_tty
)
7585 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7587 struct symtabs_and_lines
7588 decode_line_spec_1 (char *string
, int funfirstline
)
7590 struct symtabs_and_lines sals
;
7592 error (_("Empty line specification."));
7593 if (default_breakpoint_valid
)
7594 sals
= decode_line_1 (&string
, funfirstline
,
7595 default_breakpoint_symtab
,
7596 default_breakpoint_line
,
7597 (char ***) NULL
, NULL
);
7599 sals
= decode_line_1 (&string
, funfirstline
,
7600 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7602 error (_("Junk at end of line specification: %s"), string
);
7607 _initialize_breakpoint (void)
7609 static struct cmd_list_element
*breakpoint_set_cmdlist
;
7610 static struct cmd_list_element
*breakpoint_show_cmdlist
;
7611 struct cmd_list_element
*c
;
7614 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
7617 breakpoint_chain
= 0;
7618 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7619 before a breakpoint is set. */
7620 breakpoint_count
= 0;
7622 add_com ("ignore", class_breakpoint
, ignore_command
,
7623 "Set ignore-count of breakpoint number N to COUNT.\n\
7624 Usage is `ignore N COUNT'.");
7626 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7628 add_com ("commands", class_breakpoint
, commands_command
,
7629 "Set commands to be executed when a breakpoint is hit.\n\
7630 Give breakpoint number as argument after \"commands\".\n\
7631 With no argument, the targeted breakpoint is the last one set.\n\
7632 The commands themselves follow starting on the next line.\n\
7633 Type a line containing \"end\" to indicate the end of them.\n\
7634 Give \"silent\" as the first line to make the breakpoint silent;\n\
7635 then no output is printed when it is hit, except what the commands print.");
7637 add_com ("condition", class_breakpoint
, condition_command
,
7638 "Specify breakpoint number N to break only if COND is true.\n\
7639 Usage is `condition N COND', where N is an integer and COND is an\n\
7640 expression to be evaluated whenever breakpoint N is reached.");
7642 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7643 "Set a temporary breakpoint. Args like \"break\" command.\n\
7644 Like \"break\" except the breakpoint is only temporary,\n\
7645 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7646 by using \"enable delete\" on the breakpoint number.");
7647 set_cmd_completer (c
, location_completer
);
7649 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7650 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7651 Like \"break\" except the breakpoint requires hardware support,\n\
7652 some target hardware may not have this support.");
7653 set_cmd_completer (c
, location_completer
);
7655 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7656 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7657 Like \"hbreak\" except the breakpoint is only temporary,\n\
7658 so it will be deleted when hit.");
7659 set_cmd_completer (c
, location_completer
);
7661 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7662 "Enable some breakpoints.\n\
7663 Give breakpoint numbers (separated by spaces) as arguments.\n\
7664 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7665 This is used to cancel the effect of the \"disable\" command.\n\
7666 With a subcommand you can enable temporarily.",
7667 &enablelist
, "enable ", 1, &cmdlist
);
7669 add_com ("ab", class_breakpoint
, enable_command
,
7670 "Enable some breakpoints.\n\
7671 Give breakpoint numbers (separated by spaces) as arguments.\n\
7672 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7673 This is used to cancel the effect of the \"disable\" command.\n\
7674 With a subcommand you can enable temporarily.");
7676 add_com_alias ("en", "enable", class_breakpoint
, 1);
7678 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7679 "Enable some breakpoints.\n\
7680 Give breakpoint numbers (separated by spaces) as arguments.\n\
7681 This is used to cancel the effect of the \"disable\" command.\n\
7682 May be abbreviated to simply \"enable\".\n",
7683 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7685 add_cmd ("once", no_class
, enable_once_command
,
7686 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7687 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7690 add_cmd ("delete", no_class
, enable_delete_command
,
7691 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7692 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7695 add_cmd ("delete", no_class
, enable_delete_command
,
7696 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7697 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7700 add_cmd ("once", no_class
, enable_once_command
,
7701 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7702 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7705 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7706 "Disable some breakpoints.\n\
7707 Arguments are breakpoint numbers with spaces in between.\n\
7708 To disable all breakpoints, give no argument.\n\
7709 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7710 &disablelist
, "disable ", 1, &cmdlist
);
7711 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7712 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7714 add_com ("sb", class_breakpoint
, disable_command
,
7715 "Disable some breakpoints.\n\
7716 Arguments are breakpoint numbers with spaces in between.\n\
7717 To disable all breakpoints, give no argument.\n\
7718 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7720 add_cmd ("breakpoints", class_alias
, disable_command
,
7721 "Disable some breakpoints.\n\
7722 Arguments are breakpoint numbers with spaces in between.\n\
7723 To disable all breakpoints, give no argument.\n\
7724 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7725 This command may be abbreviated \"disable\".",
7728 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7729 "Delete some breakpoints or auto-display expressions.\n\
7730 Arguments are breakpoint numbers with spaces in between.\n\
7731 To delete all breakpoints, give no argument.\n\
7733 Also a prefix command for deletion of other GDB objects.\n\
7734 The \"unset\" command is also an alias for \"delete\".",
7735 &deletelist
, "delete ", 1, &cmdlist
);
7736 add_com_alias ("d", "delete", class_breakpoint
, 1);
7738 add_com ("db", class_breakpoint
, delete_command
,
7739 "Delete some breakpoints.\n\
7740 Arguments are breakpoint numbers with spaces in between.\n\
7741 To delete all breakpoints, give no argument.\n");
7743 add_cmd ("breakpoints", class_alias
, delete_command
,
7744 "Delete some breakpoints or auto-display expressions.\n\
7745 Arguments are breakpoint numbers with spaces in between.\n\
7746 To delete all breakpoints, give no argument.\n\
7747 This command may be abbreviated \"delete\".",
7750 add_com ("clear", class_breakpoint
, clear_command
,
7751 concat ("Clear breakpoint at specified line or function.\n\
7752 Argument may be line number, function name, or \"*\" and an address.\n\
7753 If line number is specified, all breakpoints in that line are cleared.\n\
7754 If function is specified, breakpoints at beginning of function are cleared.\n\
7755 If an address is specified, breakpoints at that address are cleared.\n\n",
7756 "With no argument, clears all breakpoints in the line that the selected frame\n\
7759 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7761 c
= add_com ("break", class_breakpoint
, break_command
,
7762 concat ("Set breakpoint at specified line or function.\n\
7763 Argument may be line number, function name, or \"*\" and an address.\n\
7764 If line number is specified, break at start of code for that line.\n\
7765 If function is specified, break at start of code for that function.\n\
7766 If an address is specified, break at that exact address.\n",
7767 "With no arg, uses current execution address of selected stack frame.\n\
7768 This is useful for breaking on return to a stack frame.\n\
7770 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7772 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7773 set_cmd_completer (c
, location_completer
);
7775 add_com_alias ("b", "break", class_run
, 1);
7776 add_com_alias ("br", "break", class_run
, 1);
7777 add_com_alias ("bre", "break", class_run
, 1);
7778 add_com_alias ("brea", "break", class_run
, 1);
7782 add_com_alias ("ba", "break", class_breakpoint
, 1);
7783 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7788 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7789 "Break in function/address or break at a line in the current file.",
7790 &stoplist
, "stop ", 1, &cmdlist
);
7791 add_cmd ("in", class_breakpoint
, stopin_command
,
7792 "Break in function or address.\n", &stoplist
);
7793 add_cmd ("at", class_breakpoint
, stopat_command
,
7794 "Break at a line in the current file.\n", &stoplist
);
7795 add_com ("status", class_info
, breakpoints_info
,
7796 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7797 The \"Type\" column indicates one of:\n\
7798 \tbreakpoint - normal breakpoint\n\
7799 \twatchpoint - watchpoint\n\
7800 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7801 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7802 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7803 address and file/line number respectively.\n\n",
7804 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7805 are set to the address of the last breakpoint listed.\n\n\
7806 Convenience variable \"$bpnum\" contains the number of the last\n\
7807 breakpoint set.", NULL
));
7810 add_info ("breakpoints", breakpoints_info
,
7811 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7812 The \"Type\" column indicates one of:\n\
7813 \tbreakpoint - normal breakpoint\n\
7814 \twatchpoint - watchpoint\n\
7815 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7816 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7817 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7818 address and file/line number respectively.\n\n",
7819 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7820 are set to the address of the last breakpoint listed.\n\n\
7821 Convenience variable \"$bpnum\" contains the number of the last\n\
7822 breakpoint set.", NULL
));
7825 add_com ("lb", class_breakpoint
, breakpoints_info
,
7826 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7827 The \"Type\" column indicates one of:\n\
7828 \tbreakpoint - normal breakpoint\n\
7829 \twatchpoint - watchpoint\n\
7830 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7831 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7832 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7833 address and file/line number respectively.\n\n",
7834 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7835 are set to the address of the last breakpoint listed.\n\n\
7836 Convenience variable \"$bpnum\" contains the number of the last\n\
7837 breakpoint set.", NULL
));
7839 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7840 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7841 The \"Type\" column indicates one of:\n\
7842 \tbreakpoint - normal breakpoint\n\
7843 \twatchpoint - watchpoint\n\
7844 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7845 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7846 \tuntil - internal breakpoint used by the \"until\" command\n\
7847 \tfinish - internal breakpoint used by the \"finish\" command\n",
7848 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7849 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7850 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7851 address and file/line number respectively.\n\n",
7852 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7853 are set to the address of the last breakpoint listed.\n\n\
7854 Convenience variable \"$bpnum\" contains the number of the last\n\
7855 breakpoint set.", NULL
),
7856 &maintenanceinfolist
);
7858 add_com ("catch", class_breakpoint
, catch_command
,
7859 "Set catchpoints to catch events.\n\
7860 Raised signals may be caught:\n\
7861 \tcatch signal - all signals\n\
7862 \tcatch signal <signame> - a particular signal\n\
7863 Raised exceptions may be caught:\n\
7864 \tcatch throw - all exceptions, when thrown\n\
7865 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7866 \tcatch catch - all exceptions, when caught\n\
7867 \tcatch catch <exceptname> - a particular exception, when caught\n\
7868 Thread or process events may be caught:\n\
7869 \tcatch thread_start - any threads, just after creation\n\
7870 \tcatch thread_exit - any threads, just before expiration\n\
7871 \tcatch thread_join - any threads, just after joins\n\
7872 Process events may be caught:\n\
7873 \tcatch start - any processes, just after creation\n\
7874 \tcatch exit - any processes, just before expiration\n\
7875 \tcatch fork - calls to fork()\n\
7876 \tcatch vfork - calls to vfork()\n\
7877 \tcatch exec - calls to exec()\n\
7878 Dynamically-linked library events may be caught:\n\
7879 \tcatch load - loads of any library\n\
7880 \tcatch load <libname> - loads of a particular library\n\
7881 \tcatch unload - unloads of any library\n\
7882 \tcatch unload <libname> - unloads of a particular library\n\
7883 The act of your program's execution stopping may also be caught:\n\
7885 C++ exceptions may be caught:\n\
7886 \tcatch throw - all exceptions, when thrown\n\
7887 \tcatch catch - all exceptions, when caught\n\
7889 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7890 after a fork or vfork is caught.\n\n\
7891 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7893 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7894 "Set temporary catchpoints to catch events.\n\
7895 Args like \"catch\" command.\n\
7896 Like \"catch\" except the catchpoint is only temporary,\n\
7897 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7898 by using \"enable delete\" on the catchpoint number.");
7900 c
= add_com ("watch", class_breakpoint
, watch_command
,
7901 "Set a watchpoint for an expression.\n\
7902 A watchpoint stops execution of your program whenever the value of\n\
7903 an expression changes.");
7904 set_cmd_completer (c
, location_completer
);
7906 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
7907 "Set a read watchpoint for an expression.\n\
7908 A watchpoint stops execution of your program whenever the value of\n\
7909 an expression is read.");
7910 set_cmd_completer (c
, location_completer
);
7912 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
7913 "Set a watchpoint for an expression.\n\
7914 A watchpoint stops execution of your program whenever the value of\n\
7915 an expression is either read or written.");
7916 set_cmd_completer (c
, location_completer
);
7918 add_info ("watchpoints", breakpoints_info
,
7919 "Synonym for ``info breakpoints''.");
7922 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
7923 (char *) &can_use_hw_watchpoints
,
7924 "Set debugger's willingness to use watchpoint hardware.\n\
7925 If zero, gdb will not use hardware for new watchpoints, even if\n\
7926 such is available. (However, any hardware watchpoints that were\n\
7927 created before setting this to nonzero, will continue to use watchpoint\n\
7930 deprecated_add_show_from_set (c
, &showlist
);
7932 can_use_hw_watchpoints
= 1;
7934 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, "\
7935 Breakpoint specific settings\n\
7936 Configure various breakpoint-specific variables such as\n\
7937 pending breakpoint behavior",
7938 &breakpoint_set_cmdlist
, "set breakpoint ",
7939 0/*allow-unknown*/, &setlist
);
7940 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, "\
7941 Breakpoint specific settings\n\
7942 Configure various breakpoint-specific variables such as\n\
7943 pending breakpoint behavior",
7944 &breakpoint_show_cmdlist
, "show breakpoint ",
7945 0/*allow-unknown*/, &showlist
);
7947 add_setshow_auto_boolean_cmd ("pending", no_class
, &pending_break_support
, "\
7948 Set debugger's behavior regarding pending breakpoints.", "\
7949 Show debugger's behavior regarding pending breakpoints.", "\
7950 If on, an unrecognized breakpoint location will cause gdb to create a\n\
7951 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
7952 an error. If auto, an unrecognized breakpoint location results in a\n\
7953 user-query to see if a pending breakpoint should be created.",
7954 NULL
, /* PRINT: Debugger's behavior regarding pending breakpoints is %s. */
7956 &breakpoint_set_cmdlist
,
7957 &breakpoint_show_cmdlist
);
7959 pending_break_support
= AUTO_BOOLEAN_AUTO
;