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 Free Software
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
28 #include "breakpoint.h"
30 #include "expression.h"
36 #include "gdbthread.h"
39 #include "gdb_string.h"
46 #include "completer.h"
49 #include "cli/cli-script.h"
50 #include "gdb_assert.h"
52 #include "gdb-events.h"
54 /* Prototypes for local functions. */
56 static void until_break_command_continuation (struct continuation_arg
*arg
);
58 static void catch_command_1 (char *, int, int);
60 static void enable_delete_command (char *, int);
62 static void enable_delete_breakpoint (struct breakpoint
*);
64 static void enable_once_command (char *, int);
66 static void enable_once_breakpoint (struct breakpoint
*);
68 static void disable_command (char *, int);
70 static void enable_command (char *, int);
72 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
74 static void ignore_command (char *, int);
76 static int breakpoint_re_set_one (PTR
);
78 static void clear_command (char *, int);
80 static void catch_command (char *, int);
82 static void handle_gnu_4_16_catch_command (char *, int, int);
84 static struct symtabs_and_lines
get_catch_sals (int);
86 static void watch_command (char *, int);
88 static int can_use_hardware_watchpoint (struct value
*);
90 extern void break_at_finish_command (char *, int);
91 extern void break_at_finish_at_depth_command (char *, int);
93 extern void tbreak_at_finish_command (char *, int);
95 static void break_command_1 (char *, int, int);
97 static void mention (struct breakpoint
*);
99 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
101 static void check_duplicates (struct breakpoint
*);
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 (PTR
);
113 static void cleanup_executing_breakpoints (PTR
);
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 breakpoint
*, 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 (PTR
);
145 static int cover_target_enable_exception_callback (PTR
);
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 break_at_finish_at_depth_command_1 (char *arg
,
179 int flag
, int from_tty
);
181 static void break_at_finish_command_1 (char *arg
, int flag
, int from_tty
);
183 static void stop_command (char *arg
, int from_tty
);
185 static void stopin_command (char *arg
, int from_tty
);
187 static void stopat_command (char *arg
, int from_tty
);
189 static char *ep_find_event_name_end (char *arg
);
191 static char *ep_parse_optional_if_clause (char **arg
);
193 static char *ep_parse_optional_filename (char **arg
);
195 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
196 static void catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
);
199 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
200 enum exception_event_kind ex_event
,
201 struct symtab_and_line
*sal
);
203 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
204 char *arg
, int tempflag
, int from_tty
);
206 static void tcatch_command (char *arg
, int from_tty
);
208 static void ep_skip_leading_whitespace (char **s
);
210 /* Prototypes for exported functions. */
212 /* If FALSE, gdb will not use hardware support for watchpoints, even
213 if such is available. */
214 static int can_use_hw_watchpoints
;
216 void _initialize_breakpoint (void);
218 extern int addressprint
; /* Print machine addresses? */
220 /* Are we executing breakpoint commands? */
221 static int executing_breakpoint_commands
;
223 /* Are overlay event breakpoints enabled? */
224 static int overlay_events_enabled
;
226 /* Walk the following statement or block through all breakpoints.
227 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
230 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
232 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
233 for (B = breakpoint_chain; \
234 B ? (TMP=B->next, 1): 0; \
237 /* True if SHIFT_INST_REGS defined, false otherwise. */
239 int must_shift_inst_regs
=
240 #if defined(SHIFT_INST_REGS)
247 /* True if breakpoint hit counts should be displayed in breakpoint info. */
249 int show_breakpoint_hit_counts
= 1;
251 /* Chain of all breakpoints defined. */
253 struct breakpoint
*breakpoint_chain
;
255 /* Number of last breakpoint made. */
257 int breakpoint_count
;
259 /* Pointer to current exception event record */
260 static struct exception_event_record
*current_exception_event
;
262 /* Indicator of whether exception catchpoints should be nuked
263 between runs of a program */
264 int exception_catchpoints_are_fragile
= 0;
266 /* Indicator of when exception catchpoints set-up should be
267 reinitialized -- e.g. when program is re-run */
268 int exception_support_initialized
= 0;
270 /* This function returns a pointer to the string representation of the
271 pathname of the dynamically-linked library that has just been
274 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
275 or undefined results are guaranteed.
277 This string's contents are only valid immediately after the
278 inferior has stopped in the dynamic linker hook, and becomes
279 invalid as soon as the inferior is continued. Clients should make
280 a copy of this string if they wish to continue the inferior and
281 then access the string. */
283 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
284 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
287 /* This function returns a pointer to the string representation of the
288 pathname of the dynamically-linked library that has just been
291 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
292 TRUE, or undefined results are guaranteed.
294 This string's contents are only valid immediately after the
295 inferior has stopped in the dynamic linker hook, and becomes
296 invalid as soon as the inferior is continued. Clients should make
297 a copy of this string if they wish to continue the inferior and
298 then access the string. */
300 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
301 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
304 /* This function is called by the "catch load" command. It allows the
305 debugger to be notified by the dynamic linker when a specified
306 library file (or any library file, if filename is NULL) is loaded. */
308 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
309 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
310 error ("catch of library loads not yet implemented on this platform")
313 /* This function is called by the "catch unload" command. It allows
314 the debugger to be notified by the dynamic linker when a specified
315 library file (or any library file, if filename is NULL) is
318 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
319 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
320 error ("catch of library unloads not yet implemented on this platform")
323 /* Set breakpoint count to NUM. */
326 set_breakpoint_count (int num
)
328 breakpoint_count
= num
;
329 set_internalvar (lookup_internalvar ("bpnum"),
330 value_from_longest (builtin_type_int
, (LONGEST
) num
));
333 /* Used in run_command to zero the hit count when a new run starts. */
336 clear_breakpoint_hit_counts (void)
338 struct breakpoint
*b
;
344 /* Default address, symtab and line to put a breakpoint at
345 for "break" command with no arg.
346 if default_breakpoint_valid is zero, the other three are
347 not valid, and "break" with no arg is an error.
349 This set by print_stack_frame, which calls set_default_breakpoint. */
351 int default_breakpoint_valid
;
352 CORE_ADDR default_breakpoint_address
;
353 struct symtab
*default_breakpoint_symtab
;
354 int default_breakpoint_line
;
356 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
357 Advance *PP after the string and any trailing whitespace.
359 Currently the string can either be a number or "$" followed by the name
360 of a convenience variable. Making it an expression wouldn't work well
361 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
363 TRAILER is a character which can be found after the number; most
364 commonly this is `-'. If you don't want a trailer, use \0. */
366 get_number_trailer (char **pp
, int trailer
)
368 int retval
= 0; /* default */
372 /* Empty line means refer to the last breakpoint. */
373 return breakpoint_count
;
376 /* Make a copy of the name, so we can null-terminate it
377 to pass to lookup_internalvar(). */
382 while (isalnum (*p
) || *p
== '_')
384 varname
= (char *) alloca (p
- start
+ 1);
385 strncpy (varname
, start
, p
- start
);
386 varname
[p
- start
] = '\0';
387 val
= value_of_internalvar (lookup_internalvar (varname
));
388 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_INT
)
389 retval
= (int) value_as_long (val
);
392 printf_filtered ("Convenience variable must have integer value.\n");
400 while (*p
>= '0' && *p
<= '9')
403 /* There is no number here. (e.g. "cond a == b"). */
405 /* Skip non-numeric token */
406 while (*p
&& !isspace((int) *p
))
408 /* Return zero, which caller must interpret as error. */
414 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
416 /* Trailing junk: return 0 and let caller print error msg. */
417 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
428 /* Like get_number_trailer, but don't allow a trailer. */
430 get_number (char **pp
)
432 return get_number_trailer (pp
, '\0');
435 /* Parse a number or a range.
436 * A number will be of the form handled by get_number.
437 * A range will be of the form <number1> - <number2>, and
438 * will represent all the integers between number1 and number2,
441 * While processing a range, this fuction is called iteratively;
442 * At each call it will return the next value in the range.
444 * At the beginning of parsing a range, the char pointer PP will
445 * be advanced past <number1> and left pointing at the '-' token.
446 * Subsequent calls will not advance the pointer until the range
447 * is completed. The call that completes the range will advance
448 * pointer PP past <number2>.
452 get_number_or_range (char **pp
)
454 static int last_retval
, end_value
;
455 static char *end_ptr
;
456 static int in_range
= 0;
460 /* Default case: pp is pointing either to a solo number,
461 or to the first number of a range. */
462 last_retval
= get_number_trailer (pp
, '-');
467 /* This is the start of a range (<number1> - <number2>).
468 Skip the '-', parse and remember the second number,
469 and also remember the end of the final token. */
473 while (isspace ((int) *end_ptr
))
474 end_ptr
++; /* skip white space */
475 end_value
= get_number (temp
);
476 if (end_value
< last_retval
)
478 error ("inverted range");
480 else if (end_value
== last_retval
)
482 /* degenerate range (number1 == number2). Advance the
483 token pointer so that the range will be treated as a
492 error ("negative value");
495 /* pp points to the '-' that betokens a range. All
496 number-parsing has already been done. Return the next
497 integer value (one greater than the saved previous value).
498 Do not advance the token pointer 'pp' until the end of range
501 if (++last_retval
== end_value
)
503 /* End of range reached; advance token pointer. */
513 /* condition N EXP -- set break condition of breakpoint N to EXP. */
516 condition_command (char *arg
, int from_tty
)
518 register struct breakpoint
*b
;
523 error_no_arg ("breakpoint number");
526 bnum
= get_number (&p
);
528 error ("Bad breakpoint argument: '%s'", arg
);
531 if (b
->number
== bnum
)
538 if (b
->cond_string
!= NULL
)
539 xfree (b
->cond_string
);
544 b
->cond_string
= NULL
;
546 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
551 /* I don't know if it matters whether this is the string the user
552 typed in or the decompiled expression. */
553 b
->cond_string
= savestring (arg
, strlen (arg
));
554 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->address
), 0);
556 error ("Junk at end of expression");
558 breakpoints_changed ();
559 breakpoint_modify_event (b
->number
);
563 error ("No breakpoint number %d.", bnum
);
568 commands_command (char *arg
, int from_tty
)
570 register struct breakpoint
*b
;
573 struct command_line
*l
;
575 /* If we allowed this, we would have problems with when to
576 free the storage, if we change the commands currently
579 if (executing_breakpoint_commands
)
580 error ("Can't use the \"commands\" command among a breakpoint's commands.");
583 bnum
= get_number (&p
);
586 error ("Unexpected extra arguments following breakpoint number.");
589 if (b
->number
== bnum
)
593 "Type commands for when breakpoint %d is hit, one per line.",
595 l
= read_command_lines (tmpbuf
, from_tty
);
596 free_command_lines (&b
->commands
);
598 breakpoints_changed ();
599 breakpoint_modify_event (b
->number
);
602 error ("No breakpoint number %d.", bnum
);
605 /* Like target_read_memory() but if breakpoints are inserted, return
606 the shadow contents instead of the breakpoints themselves.
608 Read "memory data" from whatever target or inferior we have.
609 Returns zero if successful, errno value if not. EIO is used
610 for address out of bounds. If breakpoints are inserted, returns
611 shadow contents, not the breakpoints themselves. From breakpoint.c. */
614 read_memory_nobpt (CORE_ADDR memaddr
, char *myaddr
, unsigned len
)
617 struct breakpoint
*b
;
618 CORE_ADDR bp_addr
= 0;
621 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
622 /* No breakpoints on this machine. */
623 return target_read_memory (memaddr
, myaddr
, len
);
627 if (b
->type
== bp_none
)
628 warning ("reading through apparently deleted breakpoint #%d?",
631 /* memory breakpoint? */
632 if (b
->type
== bp_watchpoint
633 || b
->type
== bp_hardware_watchpoint
634 || b
->type
== bp_read_watchpoint
635 || b
->type
== bp_access_watchpoint
)
640 /* Addresses and length of the part of the breakpoint that
642 /* XXXX The m68k, sh and h8300 have different local and remote
643 breakpoint values. BREAKPOINT_FROM_PC still manages to
644 correctly determine the breakpoints memory address and size
645 for these targets. */
646 bp_addr
= b
->address
;
648 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
653 if (bp_addr
+ bp_size
<= memaddr
)
654 /* The breakpoint is entirely before the chunk of memory we
657 if (bp_addr
>= memaddr
+ len
)
658 /* The breakpoint is entirely after the chunk of memory we are
661 /* Copy the breakpoint from the shadow contents, and recurse for
662 the things before and after. */
664 /* Offset within shadow_contents. */
667 if (bp_addr
< memaddr
)
669 /* Only copy the second part of the breakpoint. */
670 bp_size
-= memaddr
- bp_addr
;
671 bptoffset
= memaddr
- bp_addr
;
675 if (bp_addr
+ bp_size
> memaddr
+ len
)
677 /* Only copy the first part of the breakpoint. */
678 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
681 memcpy (myaddr
+ bp_addr
- memaddr
,
682 b
->shadow_contents
+ bptoffset
, bp_size
);
684 if (bp_addr
> memaddr
)
686 /* Copy the section of memory before the breakpoint. */
687 status
= read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
692 if (bp_addr
+ bp_size
< memaddr
+ len
)
694 /* Copy the section of memory after the breakpoint. */
695 status
= read_memory_nobpt (bp_addr
+ bp_size
,
696 myaddr
+ bp_addr
+ bp_size
- memaddr
,
697 memaddr
+ len
- (bp_addr
+ bp_size
));
704 /* Nothing overlaps. Just call read_memory_noerr. */
705 return target_read_memory (memaddr
, myaddr
, len
);
709 /* insert_breakpoints is used when starting or continuing the program.
710 remove_breakpoints is used when the program stops.
711 Both return zero if successful,
712 or an `errno' value if could not write the inferior. */
715 insert_breakpoints (void)
717 register struct breakpoint
*b
, *temp
;
718 int return_val
= 0; /* return success code. */
720 int disabled_breaks
= 0;
721 int hw_breakpoint_error
= 0;
722 #ifdef ONE_PROCESS_WRITETEXT
723 int process_warning
= 0;
726 static char message1
[] = "Error inserting catchpoint %d:\n";
727 static char message
[sizeof (message1
) + 30];
729 struct ui_file
*tmp_error_stream
= mem_fileopen ();
730 make_cleanup_ui_file_delete (tmp_error_stream
);
732 /* Explicitly mark the warning -- this will only be printed if
733 there was an error. */
734 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
736 ALL_BREAKPOINTS_SAFE (b
, temp
)
738 if (b
->enable_state
== bp_permanent
)
739 /* Permanent breakpoints cannot be inserted or removed. */
741 if ((b
->type
== bp_watchpoint
742 || b
->type
== bp_hardware_watchpoint
743 || b
->type
== bp_read_watchpoint
744 || b
->type
== bp_access_watchpoint
) && (!b
->val
))
747 val
= evaluate_expression (b
->exp
);
749 if (VALUE_LAZY (val
))
750 value_fetch_lazy (val
);
753 if (b
->type
!= bp_watchpoint
754 && b
->type
!= bp_hardware_watchpoint
755 && b
->type
!= bp_read_watchpoint
756 && b
->type
!= bp_access_watchpoint
757 && b
->type
!= bp_catch_fork
758 && b
->type
!= bp_catch_vfork
759 && b
->type
!= bp_catch_exec
760 && b
->type
!= bp_catch_throw
761 && b
->type
!= bp_catch_catch
762 && b
->enable_state
!= bp_disabled
763 && b
->enable_state
!= bp_shlib_disabled
764 && b
->enable_state
!= bp_call_disabled
768 /* "Normal" instruction breakpoint: either the standard
769 trap-instruction bp (bp_breakpoint), or a
770 bp_hardware_breakpoint. */
772 /* First check to see if we have to handle an overlay. */
773 if (overlay_debugging
== ovly_off
774 || b
->section
== NULL
775 || !(section_is_overlay (b
->section
)))
777 /* No overlay handling: just set the breakpoint. */
779 if (b
->type
== bp_hardware_breakpoint
)
780 val
= target_insert_hw_breakpoint (b
->address
,
783 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
787 /* This breakpoint is in an overlay section.
788 Shall we set a breakpoint at the LMA? */
789 if (!overlay_events_enabled
)
791 /* Yes -- overlay event support is not active,
792 so we must try to set a breakpoint at the LMA.
793 This will not work for a hardware breakpoint. */
794 if (b
->type
== bp_hardware_breakpoint
)
795 warning ("hardware breakpoint %d not supported in overlay!\n",
799 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
801 /* Set a software (trap) breakpoint at the LMA. */
802 val
= target_insert_breakpoint (addr
, b
->shadow_contents
);
804 fprintf_unfiltered (tmp_error_stream
,
805 "Overlay breakpoint %d failed: in ROM?",
809 /* Shall we set a breakpoint at the VMA? */
810 if (section_is_mapped (b
->section
))
812 /* Yes. This overlay section is mapped into memory. */
813 if (b
->type
== bp_hardware_breakpoint
)
814 val
= target_insert_hw_breakpoint (b
->address
,
817 val
= target_insert_breakpoint (b
->address
,
822 /* No. This breakpoint will not be inserted.
823 No error, but do not mark the bp as 'inserted'. */
830 /* Can't set the breakpoint. */
831 #if defined (DISABLE_UNSETTABLE_BREAK)
832 if (DISABLE_UNSETTABLE_BREAK (b
->address
))
834 /* See also: disable_breakpoints_in_shlibs. */
836 b
->enable_state
= bp_shlib_disabled
;
837 if (!disabled_breaks
)
839 fprintf_unfiltered (tmp_error_stream
,
840 "Cannot insert breakpoint %d.\n",
842 fprintf_unfiltered (tmp_error_stream
,
843 "Temporarily disabling shared library breakpoints:\n");
846 fprintf_unfiltered (tmp_error_stream
,
847 "breakpoint #%d\n", b
->number
);
852 #ifdef ONE_PROCESS_WRITETEXT
855 if (b
->type
== bp_hardware_breakpoint
)
857 hw_breakpoint_error
= 1;
858 fprintf_unfiltered (tmp_error_stream
,
859 "Cannot insert hardware breakpoint %d.\n",
864 fprintf_unfiltered (tmp_error_stream
,
865 "Cannot insert breakpoint %d.\n",
867 fprintf_filtered (tmp_error_stream
,
868 "Error accessing memory address ");
869 print_address_numeric (b
->address
, 1, tmp_error_stream
);
870 fprintf_filtered (tmp_error_stream
, ": %s.\n",
871 safe_strerror (val
));
880 return_val
= val
; /* remember failure */
882 else if (ep_is_exception_catchpoint (b
)
883 && b
->enable_state
!= bp_disabled
884 && b
->enable_state
!= bp_shlib_disabled
885 && b
->enable_state
!= bp_call_disabled
890 /* If we get here, we must have a callback mechanism for exception
891 events -- with g++ style embedded label support, we insert
892 ordinary breakpoints and not catchpoints. */
893 /* Format possible error message */
894 sprintf (message
, message1
, b
->number
);
896 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
899 /* Couldn't set breakpoint for some reason */
900 fprintf_unfiltered (tmp_error_stream
,
901 "Cannot insert catchpoint %d; disabling it.\n",
903 fprintf_filtered (tmp_error_stream
,
904 "Error accessing memory address ");
905 print_address_numeric (b
->address
, 1, tmp_error_stream
);
906 fprintf_filtered (tmp_error_stream
, ": %s.\n",
907 safe_strerror (val
));
908 b
->enable_state
= bp_disabled
;
912 /* Bp set, now make sure callbacks are enabled */
914 args_for_catchpoint_enable args
;
915 args
.kind
= b
->type
== bp_catch_catch
?
916 EX_EVENT_CATCH
: EX_EVENT_THROW
;
918 val
= catch_errors (cover_target_enable_exception_callback
,
920 message
, RETURN_MASK_ALL
);
921 if (val
!= 0 && val
!= -1)
925 /* Check if something went wrong; val == 0 can be ignored */
928 /* something went wrong */
929 fprintf_unfiltered (tmp_error_stream
,
930 "Cannot insert catchpoint %d; disabling it.\n",
932 b
->enable_state
= bp_disabled
;
937 return_val
= val
; /* remember failure */
940 else if ((b
->type
== bp_hardware_watchpoint
||
941 b
->type
== bp_read_watchpoint
||
942 b
->type
== bp_access_watchpoint
)
943 && b
->enable_state
== bp_enabled
944 && b
->disposition
!= disp_del_at_next_stop
948 struct frame_info
*saved_frame
;
949 int saved_level
, within_current_scope
;
950 struct value
*mark
= value_mark ();
953 /* Save the current frame and level so we can restore it after
954 evaluating the watchpoint expression on its own frame. */
955 saved_frame
= deprecated_selected_frame
;
956 saved_level
= frame_relative_level (deprecated_selected_frame
);
958 /* Determine if the watchpoint is within scope. */
959 if (b
->exp_valid_block
== NULL
)
960 within_current_scope
= 1;
963 struct frame_info
*fi
;
964 fi
= frame_find_by_id (b
->watchpoint_frame
);
965 within_current_scope
= (fi
!= NULL
);
966 if (within_current_scope
)
970 if (within_current_scope
)
972 /* Evaluate the expression and cut the chain of values
973 produced off from the value chain.
975 Make sure the value returned isn't lazy; we use
976 laziness to determine what memory GDB actually needed
977 in order to compute the value of the expression. */
978 v
= evaluate_expression (b
->exp
);
980 value_release_to_mark (mark
);
985 /* Look at each value on the value chain. */
986 for (; v
; v
= v
->next
)
988 /* If it's a memory location, and GDB actually needed
989 its contents to evaluate the expression, then we
991 if (VALUE_LVAL (v
) == lval_memory
994 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
996 /* We only watch structs and arrays if user asked
997 for it explicitly, never if they just happen to
998 appear in the middle of some value chain. */
999 if (v
== b
->val_chain
1000 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1001 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1006 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1007 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1009 if (b
->type
== bp_read_watchpoint
)
1011 else if (b
->type
== bp_access_watchpoint
)
1014 val
= target_insert_watchpoint (addr
, len
, type
);
1017 /* Don't exit the loop, try to insert
1018 every value on the value chain. That's
1019 because we will be removing all the
1020 watches below, and removing a
1021 watchpoint we didn't insert could have
1029 /* Failure to insert a watchpoint on any memory value in the
1030 value chain brings us here. */
1033 remove_breakpoint (b
, mark_uninserted
);
1034 hw_breakpoint_error
= 1;
1035 fprintf_unfiltered (tmp_error_stream
,
1036 "Could not insert hardware watchpoint %d.\n",
1043 printf_filtered ("Hardware watchpoint %d deleted ", b
->number
);
1044 printf_filtered ("because the program has left the block \n");
1045 printf_filtered ("in which its expression is valid.\n");
1046 if (b
->related_breakpoint
)
1047 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1048 b
->disposition
= disp_del_at_next_stop
;
1051 /* Restore the frame and level. */
1052 if ((saved_frame
!= deprecated_selected_frame
) ||
1053 (saved_level
!= frame_relative_level (deprecated_selected_frame
)))
1054 select_frame (saved_frame
);
1057 return_val
= val
; /* remember failure */
1059 else if ((b
->type
== bp_catch_fork
1060 || b
->type
== bp_catch_vfork
1061 || b
->type
== bp_catch_exec
)
1062 && b
->enable_state
== bp_enabled
1070 val
= target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
1072 case bp_catch_vfork
:
1073 val
= target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
1076 val
= target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
1079 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1084 fprintf_unfiltered (tmp_error_stream
,
1085 "Cannot insert catchpoint %d.", b
->number
);
1091 return_val
= val
; /* remember failure */
1097 /* If a hardware breakpoint or watchpoint was inserted, add a
1098 message about possibly exhausted resources. */
1099 if (hw_breakpoint_error
)
1101 fprintf_unfiltered (tmp_error_stream
,
1102 "Could not insert hardware breakpoints:\n\
1103 You may have requested too many hardware breakpoints/watchpoints.\n");
1105 #ifdef ONE_PROCESS_WRITETEXT
1106 if (process_warning
)
1107 fprintf_unfiltered (tmp_error_stream
,
1108 "The same program may be running in another process.");
1110 target_terminal_ours_for_output ();
1111 error_stream (tmp_error_stream
);
1117 remove_breakpoints (void)
1119 register struct breakpoint
*b
;
1126 val
= remove_breakpoint (b
, mark_uninserted
);
1135 remove_hw_watchpoints (void)
1137 register struct breakpoint
*b
;
1143 && (b
->type
== bp_hardware_watchpoint
1144 || b
->type
== bp_read_watchpoint
1145 || b
->type
== bp_access_watchpoint
))
1147 val
= remove_breakpoint (b
, mark_uninserted
);
1156 reattach_breakpoints (int pid
)
1158 register struct breakpoint
*b
;
1160 struct cleanup
*old_chain
= save_inferior_ptid ();
1162 /* Set inferior_ptid; remove_breakpoint uses this global. */
1163 inferior_ptid
= pid_to_ptid (pid
);
1168 remove_breakpoint (b
, mark_inserted
);
1169 if (b
->type
== bp_hardware_breakpoint
)
1170 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1172 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1175 do_cleanups (old_chain
);
1180 do_cleanups (old_chain
);
1185 update_breakpoints_after_exec (void)
1187 struct breakpoint
*b
;
1188 struct breakpoint
*temp
;
1190 /* Doing this first prevents the badness of having delete_breakpoint()
1191 write a breakpoint's current "shadow contents" to lift the bp. That
1192 shadow is NOT valid after an exec()! */
1193 mark_breakpoints_out ();
1195 ALL_BREAKPOINTS_SAFE (b
, temp
)
1197 /* Solib breakpoints must be explicitly reset after an exec(). */
1198 if (b
->type
== bp_shlib_event
)
1200 delete_breakpoint (b
);
1204 /* Thread event breakpoints must be set anew after an exec(),
1205 as must overlay event breakpoints. */
1206 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1208 delete_breakpoint (b
);
1212 /* Step-resume breakpoints are meaningless after an exec(). */
1213 if (b
->type
== bp_step_resume
)
1215 delete_breakpoint (b
);
1219 /* Ditto the sigtramp handler breakpoints. */
1220 if (b
->type
== bp_through_sigtramp
)
1222 delete_breakpoint (b
);
1226 /* Ditto the exception-handling catchpoints. */
1227 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1229 delete_breakpoint (b
);
1233 /* Don't delete an exec catchpoint, because else the inferior
1234 won't stop when it ought!
1236 Similarly, we probably ought to keep vfork catchpoints, 'cause
1237 on this target, we may not be able to stop when the vfork is
1238 seen, but only when the subsequent exec is seen. (And because
1239 deleting fork catchpoints here but not vfork catchpoints will
1240 seem mysterious to users, keep those too.)
1242 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1243 target address field, if any, is sufficient to have it be reset
1244 automagically. Certainly on HP-UX that's true.
1246 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1247 valid code address on some platforms (like the mn10200 and
1248 mn10300 simulators). We shouldn't assign any special
1249 interpretation to a breakpoint with a zero address. And in
1250 fact, GDB doesn't --- I can't see what that comment above is
1251 talking about. As far as I can tell, setting the address of a
1252 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1253 is meaningless, since those are implemented with HP-UX kernel
1254 hackery, not by storing breakpoint instructions somewhere. */
1255 if ((b
->type
== bp_catch_exec
) ||
1256 (b
->type
== bp_catch_vfork
) ||
1257 (b
->type
== bp_catch_fork
))
1259 b
->address
= (CORE_ADDR
) NULL
;
1263 /* bp_finish is a special case. The only way we ought to be able
1264 to see one of these when an exec() has happened, is if the user
1265 caught a vfork, and then said "finish". Ordinarily a finish just
1266 carries them to the call-site of the current callee, by setting
1267 a temporary bp there and resuming. But in this case, the finish
1268 will carry them entirely through the vfork & exec.
1270 We don't want to allow a bp_finish to remain inserted now. But
1271 we can't safely delete it, 'cause finish_command has a handle to
1272 the bp on a bpstat, and will later want to delete it. There's a
1273 chance (and I've seen it happen) that if we delete the bp_finish
1274 here, that its storage will get reused by the time finish_command
1275 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1276 We really must allow finish_command to delete a bp_finish.
1278 In the absense of a general solution for the "how do we know
1279 it's safe to delete something others may have handles to?"
1280 problem, what we'll do here is just uninsert the bp_finish, and
1281 let finish_command delete it.
1283 (We know the bp_finish is "doomed" in the sense that it's
1284 momentary, and will be deleted as soon as finish_command sees
1285 the inferior stopped. So it doesn't matter that the bp's
1286 address is probably bogus in the new a.out, unlike e.g., the
1287 solib breakpoints.) */
1289 if (b
->type
== bp_finish
)
1294 /* Without a symbolic address, we have little hope of the
1295 pre-exec() address meaning the same thing in the post-exec()
1297 if (b
->addr_string
== NULL
)
1299 delete_breakpoint (b
);
1303 /* If this breakpoint has survived the above battery of checks, then
1304 it must have a symbolic address. Be sure that it gets reevaluated
1305 to a target address, rather than reusing the old evaluation.
1307 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1308 for bp_catch_exec and friends, I'm pretty sure this is entirely
1309 unnecessary. A call to breakpoint_re_set_one always recomputes
1310 the breakpoint's address from scratch, or deletes it if it can't.
1311 So I think this assignment could be deleted without effect. */
1312 b
->address
= (CORE_ADDR
) NULL
;
1314 /* FIXME what about longjmp breakpoints? Re-create them here? */
1315 create_overlay_event_breakpoint ("_ovly_debug_event");
1319 detach_breakpoints (int pid
)
1321 register struct breakpoint
*b
;
1323 struct cleanup
*old_chain
= save_inferior_ptid ();
1325 if (pid
== PIDGET (inferior_ptid
))
1326 error ("Cannot detach breakpoints of inferior_ptid");
1328 /* Set inferior_ptid; remove_breakpoint uses this global. */
1329 inferior_ptid
= pid_to_ptid (pid
);
1334 val
= remove_breakpoint (b
, mark_inserted
);
1337 do_cleanups (old_chain
);
1342 do_cleanups (old_chain
);
1347 remove_breakpoint (struct breakpoint
*b
, insertion_state_t is
)
1351 if (b
->enable_state
== bp_permanent
)
1352 /* Permanent breakpoints cannot be inserted or removed. */
1355 if (b
->type
== bp_none
)
1356 warning ("attempted to remove apparently deleted breakpoint #%d?",
1359 if (b
->type
!= bp_watchpoint
1360 && b
->type
!= bp_hardware_watchpoint
1361 && b
->type
!= bp_read_watchpoint
1362 && b
->type
!= bp_access_watchpoint
1363 && b
->type
!= bp_catch_fork
1364 && b
->type
!= bp_catch_vfork
1365 && b
->type
!= bp_catch_exec
1366 && b
->type
!= bp_catch_catch
1367 && b
->type
!= bp_catch_throw
)
1369 /* "Normal" instruction breakpoint: either the standard
1370 trap-instruction bp (bp_breakpoint), or a
1371 bp_hardware_breakpoint. */
1373 /* First check to see if we have to handle an overlay. */
1374 if (overlay_debugging
== ovly_off
1375 || b
->section
== NULL
1376 || !(section_is_overlay (b
->section
)))
1378 /* No overlay handling: just remove the breakpoint. */
1380 if (b
->type
== bp_hardware_breakpoint
)
1381 val
= target_remove_hw_breakpoint (b
->address
,
1382 b
->shadow_contents
);
1384 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1388 /* This breakpoint is in an overlay section.
1389 Did we set a breakpoint at the LMA? */
1390 if (!overlay_events_enabled
)
1392 /* Yes -- overlay event support is not active, so we
1393 should have set a breakpoint at the LMA. Remove it.
1395 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1397 /* Ignore any failures: if the LMA is in ROM, we will
1398 have already warned when we failed to insert it. */
1399 if (b
->type
!= bp_hardware_breakpoint
)
1400 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1402 target_remove_breakpoint (addr
, b
->shadow_contents
);
1404 /* Did we set a breakpoint at the VMA?
1405 If so, we will have marked the breakpoint 'inserted'. */
1408 /* Yes -- remove it. Previously we did not bother to
1409 remove the breakpoint if the section had been
1410 unmapped, but let's not rely on that being safe. We
1411 don't know what the overlay manager might do. */
1412 if (b
->type
== bp_hardware_breakpoint
)
1413 val
= target_remove_hw_breakpoint (b
->address
,
1414 b
->shadow_contents
);
1416 val
= target_remove_breakpoint (b
->address
,
1417 b
->shadow_contents
);
1421 /* No -- not inserted, so no need to remove. No error. */
1427 b
->inserted
= (is
== mark_inserted
);
1429 else if ((b
->type
== bp_hardware_watchpoint
||
1430 b
->type
== bp_read_watchpoint
||
1431 b
->type
== bp_access_watchpoint
)
1432 && b
->enable_state
== bp_enabled
1438 b
->inserted
= (is
== mark_inserted
);
1439 /* Walk down the saved value chain. */
1440 for (v
= b
->val_chain
; v
; v
= v
->next
)
1442 /* For each memory reference remove the watchpoint
1444 if (VALUE_LVAL (v
) == lval_memory
1445 && ! VALUE_LAZY (v
))
1447 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
1449 if (v
== b
->val_chain
1450 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1451 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1456 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1457 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1459 if (b
->type
== bp_read_watchpoint
)
1461 else if (b
->type
== bp_access_watchpoint
)
1464 val
= target_remove_watchpoint (addr
, len
, type
);
1471 /* Failure to remove any of the hardware watchpoints comes here. */
1472 if ((is
== mark_uninserted
) && (b
->inserted
))
1473 warning ("Could not remove hardware watchpoint %d.",
1476 /* Free the saved value chain. We will construct a new one
1477 the next time the watchpoint is inserted. */
1478 for (v
= b
->val_chain
; v
; v
= n
)
1483 b
->val_chain
= NULL
;
1485 else if ((b
->type
== bp_catch_fork
||
1486 b
->type
== bp_catch_vfork
||
1487 b
->type
== bp_catch_exec
)
1488 && b
->enable_state
== bp_enabled
1495 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1497 case bp_catch_vfork
:
1498 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1501 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1504 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1509 b
->inserted
= (is
== mark_inserted
);
1511 else if ((b
->type
== bp_catch_catch
||
1512 b
->type
== bp_catch_throw
)
1513 && b
->enable_state
== bp_enabled
1517 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1520 b
->inserted
= (is
== mark_inserted
);
1522 else if (ep_is_exception_catchpoint (b
)
1523 && b
->inserted
/* sometimes previous insert doesn't happen */
1524 && b
->enable_state
== bp_enabled
1528 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1532 b
->inserted
= (is
== mark_inserted
);
1538 /* Clear the "inserted" flag in all breakpoints. */
1541 mark_breakpoints_out (void)
1543 register struct breakpoint
*b
;
1549 /* Clear the "inserted" flag in all breakpoints and delete any
1550 breakpoints which should go away between runs of the program.
1552 Plus other such housekeeping that has to be done for breakpoints
1555 Note: this function gets called at the end of a run (by
1556 generic_mourn_inferior) and when a run begins (by
1557 init_wait_for_inferior). */
1562 breakpoint_init_inferior (enum inf_context context
)
1564 register struct breakpoint
*b
, *temp
;
1565 static int warning_needed
= 0;
1567 ALL_BREAKPOINTS_SAFE (b
, temp
)
1574 case bp_watchpoint_scope
:
1576 /* If the call dummy breakpoint is at the entry point it will
1577 cause problems when the inferior is rerun, so we better
1580 Also get rid of scope breakpoints. */
1581 delete_breakpoint (b
);
1585 case bp_hardware_watchpoint
:
1586 case bp_read_watchpoint
:
1587 case bp_access_watchpoint
:
1589 /* Likewise for watchpoints on local expressions. */
1590 if (b
->exp_valid_block
!= NULL
)
1591 delete_breakpoint (b
);
1592 if (context
== inf_starting
)
1594 /* Reset val field to force reread of starting value
1595 in insert_breakpoints. */
1597 value_free (b
->val
);
1602 /* Likewise for exception catchpoints in dynamic-linked
1603 executables where required */
1604 if (ep_is_exception_catchpoint (b
) &&
1605 exception_catchpoints_are_fragile
)
1608 delete_breakpoint (b
);
1614 if (exception_catchpoints_are_fragile
)
1615 exception_support_initialized
= 0;
1617 /* Don't issue the warning unless it's really needed... */
1618 if (warning_needed
&& (context
!= inf_exited
))
1620 warning ("Exception catchpoints from last run were deleted.");
1621 warning ("You must reinsert them explicitly.");
1626 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1627 exists at PC. It returns ordinary_breakpoint_here if it's an
1628 ordinary breakpoint, or permanent_breakpoint_here if it's a
1629 permanent breakpoint.
1630 - When continuing from a location with an ordinary breakpoint, we
1631 actually single step once before calling insert_breakpoints.
1632 - When continuing from a localion with a permanent breakpoint, we
1633 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1634 the target, to advance the PC past the breakpoint. */
1636 enum breakpoint_here
1637 breakpoint_here_p (CORE_ADDR pc
)
1639 register struct breakpoint
*b
;
1640 int any_breakpoint_here
= 0;
1643 if ((b
->enable_state
== bp_enabled
1644 || b
->enable_state
== bp_permanent
)
1645 && b
->address
== pc
) /* bp is enabled and matches pc */
1647 if (overlay_debugging
1648 && section_is_overlay (b
->section
)
1649 && !section_is_mapped (b
->section
))
1650 continue; /* unmapped overlay -- can't be a match */
1651 else if (b
->enable_state
== bp_permanent
)
1652 return permanent_breakpoint_here
;
1654 any_breakpoint_here
= 1;
1657 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1661 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1662 but it only returns true if there is actually a breakpoint inserted
1666 breakpoint_inserted_here_p (CORE_ADDR pc
)
1668 register struct breakpoint
*b
;
1672 && b
->address
== pc
) /* bp is inserted and matches pc */
1674 if (overlay_debugging
1675 && section_is_overlay (b
->section
)
1676 && !section_is_mapped (b
->section
))
1677 continue; /* unmapped overlay -- can't be a match */
1685 /* Return nonzero if FRAME is a dummy frame. We can't use
1686 PC_IN_CALL_DUMMY because figuring out the saved SP would take too
1687 much time, at least using get_saved_register on the 68k. This
1688 means that for this function to work right a port must use the
1689 bp_call_dummy breakpoint. */
1692 deprecated_frame_in_dummy (struct frame_info
*frame
)
1694 struct breakpoint
*b
;
1699 /* This function is used by two files: get_frame_type(), after first
1700 checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and
1701 sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */
1702 gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES
);
1706 if (b
->type
== bp_call_dummy
1707 && b
->frame
== frame
->frame
1708 /* We need to check the PC as well as the frame on the sparc,
1709 for signals.exp in the testsuite. */
1712 - SIZEOF_CALL_DUMMY_WORDS
/ sizeof (LONGEST
) * REGISTER_SIZE
))
1713 && frame
->pc
<= b
->address
)
1719 /* breakpoint_thread_match (PC, PID) returns true if the breakpoint at
1720 PC is valid for process/thread PID. */
1723 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1725 struct breakpoint
*b
;
1728 thread
= pid_to_thread_id (ptid
);
1731 if (b
->enable_state
!= bp_disabled
1732 && b
->enable_state
!= bp_shlib_disabled
1733 && b
->enable_state
!= bp_call_disabled
1735 && (b
->thread
== -1 || b
->thread
== thread
))
1737 if (overlay_debugging
1738 && section_is_overlay (b
->section
)
1739 && !section_is_mapped (b
->section
))
1740 continue; /* unmapped overlay -- can't be a match */
1749 /* bpstat stuff. External routines' interfaces are documented
1753 ep_is_catchpoint (struct breakpoint
*ep
)
1756 (ep
->type
== bp_catch_load
)
1757 || (ep
->type
== bp_catch_unload
)
1758 || (ep
->type
== bp_catch_fork
)
1759 || (ep
->type
== bp_catch_vfork
)
1760 || (ep
->type
== bp_catch_exec
)
1761 || (ep
->type
== bp_catch_catch
)
1762 || (ep
->type
== bp_catch_throw
);
1764 /* ??rehrauer: Add more kinds here, as are implemented... */
1768 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1771 (ep
->type
== bp_catch_load
)
1772 || (ep
->type
== bp_catch_unload
);
1776 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1779 (ep
->type
== bp_catch_catch
)
1780 || (ep
->type
== bp_catch_throw
);
1783 /* Clear a bpstat so that it says we are not at any breakpoint.
1784 Also free any storage that is part of a bpstat. */
1787 bpstat_clear (bpstat
*bsp
)
1798 if (p
->old_val
!= NULL
)
1799 value_free (p
->old_val
);
1800 free_command_lines (&p
->commands
);
1807 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1808 is part of the bpstat is copied as well. */
1811 bpstat_copy (bpstat bs
)
1815 bpstat retval
= NULL
;
1820 for (; bs
!= NULL
; bs
= bs
->next
)
1822 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1823 memcpy (tmp
, bs
, sizeof (*tmp
));
1825 /* This is the first thing in the chain. */
1835 /* Find the bpstat associated with this breakpoint */
1838 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1843 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1845 if (bsp
->breakpoint_at
== breakpoint
)
1851 /* Find a step_resume breakpoint associated with this bpstat.
1852 (If there are multiple step_resume bp's on the list, this function
1853 will arbitrarily pick one.)
1855 It is an error to use this function if BPSTAT doesn't contain a
1856 step_resume breakpoint.
1858 See wait_for_inferior's use of this function. */
1860 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1865 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1867 current_thread
= pid_to_thread_id (inferior_ptid
);
1869 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1871 if ((bsp
->breakpoint_at
!= NULL
) &&
1872 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1873 (bsp
->breakpoint_at
->thread
== current_thread
||
1874 bsp
->breakpoint_at
->thread
== -1))
1875 return bsp
->breakpoint_at
;
1878 error ("Internal error (no step_resume breakpoint found)");
1882 /* Return the breakpoint number of the first breakpoint we are stopped
1883 at. *BSP upon return is a bpstat which points to the remaining
1884 breakpoints stopped at (but which is not guaranteed to be good for
1885 anything but further calls to bpstat_num).
1886 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1889 bpstat_num (bpstat
*bsp
)
1891 struct breakpoint
*b
;
1894 return 0; /* No more breakpoint values */
1897 b
= (*bsp
)->breakpoint_at
;
1898 *bsp
= (*bsp
)->next
;
1900 return -1; /* breakpoint that's been deleted since */
1902 return b
->number
; /* We have its number */
1906 /* Modify BS so that the actions will not be performed. */
1909 bpstat_clear_actions (bpstat bs
)
1911 for (; bs
!= NULL
; bs
= bs
->next
)
1913 free_command_lines (&bs
->commands
);
1914 if (bs
->old_val
!= NULL
)
1916 value_free (bs
->old_val
);
1922 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1925 cleanup_executing_breakpoints (PTR ignore
)
1927 executing_breakpoint_commands
= 0;
1930 /* Execute all the commands associated with all the breakpoints at this
1931 location. Any of these commands could cause the process to proceed
1932 beyond this point, etc. We look out for such changes by checking
1933 the global "breakpoint_proceeded" after each command. */
1936 bpstat_do_actions (bpstat
*bsp
)
1939 struct cleanup
*old_chain
;
1940 struct command_line
*cmd
;
1942 /* Avoid endless recursion if a `source' command is contained
1944 if (executing_breakpoint_commands
)
1947 executing_breakpoint_commands
= 1;
1948 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
1951 /* Note that (as of this writing), our callers all appear to
1952 be passing us the address of global stop_bpstat. And, if
1953 our calls to execute_control_command cause the inferior to
1954 proceed, that global (and hence, *bsp) will change.
1956 We must be careful to not touch *bsp unless the inferior
1957 has not proceeded. */
1959 /* This pointer will iterate over the list of bpstat's. */
1962 breakpoint_proceeded
= 0;
1963 for (; bs
!= NULL
; bs
= bs
->next
)
1968 execute_control_command (cmd
);
1970 if (breakpoint_proceeded
)
1975 if (breakpoint_proceeded
)
1976 /* The inferior is proceeded by the command; bomb out now.
1977 The bpstat chain has been blown away by wait_for_inferior.
1978 But since execution has stopped again, there is a new bpstat
1979 to look at, so start over. */
1982 free_command_lines (&bs
->commands
);
1984 do_cleanups (old_chain
);
1987 /* This is the normal print function for a bpstat. In the future,
1988 much of this logic could (should?) be moved to bpstat_stop_status,
1989 by having it set different print_it values.
1991 Current scheme: When we stop, bpstat_print() is called. It loops
1992 through the bpstat list of things causing this stop, calling the
1993 print_bp_stop_message function on each one. The behavior of the
1994 print_bp_stop_message function depends on the print_it field of
1995 bpstat. If such field so indicates, call this function here.
1997 Return values from this routine (ultimately used by bpstat_print()
1998 and normal_stop() to decide what to do):
1999 PRINT_NOTHING: Means we already printed all we needed to print,
2000 don't print anything else.
2001 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2002 that something to be followed by a location.
2003 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2004 that something to be followed by a location.
2005 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2008 static enum print_stop_action
2009 print_it_typical (bpstat bs
)
2011 struct cleanup
*old_chain
;
2012 struct ui_stream
*stb
;
2013 stb
= ui_out_stream_new (uiout
);
2014 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2015 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2016 which has since been deleted. */
2017 if (bs
->breakpoint_at
== NULL
)
2018 return PRINT_UNKNOWN
;
2020 switch (bs
->breakpoint_at
->type
)
2023 case bp_hardware_breakpoint
:
2024 annotate_breakpoint (bs
->breakpoint_at
->number
);
2025 ui_out_text (uiout
, "\nBreakpoint ");
2026 if (ui_out_is_mi_like_p (uiout
))
2027 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2028 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2029 ui_out_text (uiout
, ", ");
2030 return PRINT_SRC_AND_LOC
;
2033 case bp_shlib_event
:
2034 /* Did we stop because the user set the stop_on_solib_events
2035 variable? (If so, we report this as a generic, "Stopped due
2036 to shlib event" message.) */
2037 printf_filtered ("Stopped due to shared library event\n");
2038 return PRINT_NOTHING
;
2041 case bp_thread_event
:
2042 /* Not sure how we will get here.
2043 GDB should not stop for these breakpoints. */
2044 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2045 return PRINT_NOTHING
;
2048 case bp_overlay_event
:
2049 /* By analogy with the thread event, GDB should not stop for these. */
2050 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2051 return PRINT_NOTHING
;
2055 annotate_catchpoint (bs
->breakpoint_at
->number
);
2056 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2057 printf_filtered ("loaded");
2058 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2059 return PRINT_SRC_AND_LOC
;
2062 case bp_catch_unload
:
2063 annotate_catchpoint (bs
->breakpoint_at
->number
);
2064 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2065 printf_filtered ("unloaded");
2066 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2067 return PRINT_SRC_AND_LOC
;
2071 annotate_catchpoint (bs
->breakpoint_at
->number
);
2072 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2073 printf_filtered ("forked");
2074 printf_filtered (" process %d), ",
2075 bs
->breakpoint_at
->forked_inferior_pid
);
2076 return PRINT_SRC_AND_LOC
;
2079 case bp_catch_vfork
:
2080 annotate_catchpoint (bs
->breakpoint_at
->number
);
2081 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2082 printf_filtered ("vforked");
2083 printf_filtered (" process %d), ",
2084 bs
->breakpoint_at
->forked_inferior_pid
);
2085 return PRINT_SRC_AND_LOC
;
2089 annotate_catchpoint (bs
->breakpoint_at
->number
);
2090 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2091 bs
->breakpoint_at
->number
,
2092 bs
->breakpoint_at
->exec_pathname
);
2093 return PRINT_SRC_AND_LOC
;
2096 case bp_catch_catch
:
2097 if (current_exception_event
&&
2098 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2100 annotate_catchpoint (bs
->breakpoint_at
->number
);
2101 printf_filtered ("\nCatchpoint %d (exception caught), ",
2102 bs
->breakpoint_at
->number
);
2103 printf_filtered ("throw location ");
2104 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2105 printf_filtered ("%s:%d",
2106 CURRENT_EXCEPTION_THROW_FILE
,
2107 CURRENT_EXCEPTION_THROW_LINE
);
2109 printf_filtered ("unknown");
2111 printf_filtered (", catch location ");
2112 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2113 printf_filtered ("%s:%d",
2114 CURRENT_EXCEPTION_CATCH_FILE
,
2115 CURRENT_EXCEPTION_CATCH_LINE
);
2117 printf_filtered ("unknown");
2119 printf_filtered ("\n");
2120 /* don't bother to print location frame info */
2121 return PRINT_SRC_ONLY
;
2125 /* really throw, some other bpstat will handle it */
2126 return PRINT_UNKNOWN
;
2130 case bp_catch_throw
:
2131 if (current_exception_event
&&
2132 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2134 annotate_catchpoint (bs
->breakpoint_at
->number
);
2135 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2136 bs
->breakpoint_at
->number
);
2137 printf_filtered ("throw location ");
2138 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2139 printf_filtered ("%s:%d",
2140 CURRENT_EXCEPTION_THROW_FILE
,
2141 CURRENT_EXCEPTION_THROW_LINE
);
2143 printf_filtered ("unknown");
2145 printf_filtered (", catch location ");
2146 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2147 printf_filtered ("%s:%d",
2148 CURRENT_EXCEPTION_CATCH_FILE
,
2149 CURRENT_EXCEPTION_CATCH_LINE
);
2151 printf_filtered ("unknown");
2153 printf_filtered ("\n");
2154 /* don't bother to print location frame info */
2155 return PRINT_SRC_ONLY
;
2159 /* really catch, some other bpstat will handle it */
2160 return PRINT_UNKNOWN
;
2165 case bp_hardware_watchpoint
:
2166 if (bs
->old_val
!= NULL
)
2168 annotate_watchpoint (bs
->breakpoint_at
->number
);
2169 if (ui_out_is_mi_like_p (uiout
))
2170 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2171 mention (bs
->breakpoint_at
);
2172 ui_out_tuple_begin (uiout
, "value");
2173 ui_out_text (uiout
, "\nOld value = ");
2174 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2175 ui_out_field_stream (uiout
, "old", stb
);
2176 ui_out_text (uiout
, "\nNew value = ");
2177 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2178 ui_out_field_stream (uiout
, "new", stb
);
2179 ui_out_tuple_end (uiout
);
2180 ui_out_text (uiout
, "\n");
2181 value_free (bs
->old_val
);
2184 /* More than one watchpoint may have been triggered. */
2185 return PRINT_UNKNOWN
;
2188 case bp_read_watchpoint
:
2189 if (ui_out_is_mi_like_p (uiout
))
2190 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2191 mention (bs
->breakpoint_at
);
2192 ui_out_tuple_begin (uiout
, "value");
2193 ui_out_text (uiout
, "\nValue = ");
2194 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2195 ui_out_field_stream (uiout
, "value", stb
);
2196 ui_out_tuple_end (uiout
);
2197 ui_out_text (uiout
, "\n");
2198 return PRINT_UNKNOWN
;
2201 case bp_access_watchpoint
:
2202 if (bs
->old_val
!= NULL
)
2204 annotate_watchpoint (bs
->breakpoint_at
->number
);
2205 if (ui_out_is_mi_like_p (uiout
))
2206 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2207 mention (bs
->breakpoint_at
);
2208 ui_out_tuple_begin (uiout
, "value");
2209 ui_out_text (uiout
, "\nOld value = ");
2210 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2211 ui_out_field_stream (uiout
, "old", stb
);
2212 value_free (bs
->old_val
);
2214 ui_out_text (uiout
, "\nNew value = ");
2218 mention (bs
->breakpoint_at
);
2219 if (ui_out_is_mi_like_p (uiout
))
2220 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2221 ui_out_tuple_begin (uiout
, "value");
2222 ui_out_text (uiout
, "\nValue = ");
2224 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2225 ui_out_field_stream (uiout
, "new", stb
);
2226 ui_out_tuple_end (uiout
);
2227 ui_out_text (uiout
, "\n");
2228 return PRINT_UNKNOWN
;
2231 /* Fall through, we don't deal with these types of breakpoints
2235 if (ui_out_is_mi_like_p (uiout
))
2236 ui_out_field_string (uiout
, "reason", "function-finished");
2237 return PRINT_UNKNOWN
;
2241 if (ui_out_is_mi_like_p (uiout
))
2242 ui_out_field_string (uiout
, "reason", "location-reached");
2243 return PRINT_UNKNOWN
;
2248 case bp_longjmp_resume
:
2249 case bp_step_resume
:
2250 case bp_through_sigtramp
:
2251 case bp_watchpoint_scope
:
2254 return PRINT_UNKNOWN
;
2258 /* Generic routine for printing messages indicating why we
2259 stopped. The behavior of this function depends on the value
2260 'print_it' in the bpstat structure. Under some circumstances we
2261 may decide not to print anything here and delegate the task to
2264 static enum print_stop_action
2265 print_bp_stop_message (bpstat bs
)
2267 switch (bs
->print_it
)
2270 /* Nothing should be printed for this bpstat entry. */
2271 return PRINT_UNKNOWN
;
2275 /* We still want to print the frame, but we already printed the
2276 relevant messages. */
2277 return PRINT_SRC_AND_LOC
;
2280 case print_it_normal
:
2281 /* Normal case, we handle everything in print_it_typical. */
2282 return print_it_typical (bs
);
2285 internal_error (__FILE__
, __LINE__
,
2286 "print_bp_stop_message: unrecognized enum value");
2291 /* Print a message indicating what happened. This is called from
2292 normal_stop(). The input to this routine is the head of the bpstat
2293 list - a list of the eventpoints that caused this stop. This
2294 routine calls the generic print routine for printing a message
2295 about reasons for stopping. This will print (for example) the
2296 "Breakpoint n," part of the output. The return value of this
2299 PRINT_UNKNOWN: Means we printed nothing
2300 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2301 code to print the location. An example is
2302 "Breakpoint 1, " which should be followed by
2304 PRINT_SRC_ONLY: Means we printed something, but there is no need
2305 to also print the location part of the message.
2306 An example is the catch/throw messages, which
2307 don't require a location appended to the end.
2308 PRINT_NOTHING: We have done some printing and we don't need any
2309 further info to be printed.*/
2311 enum print_stop_action
2312 bpstat_print (bpstat bs
)
2316 /* Maybe another breakpoint in the chain caused us to stop.
2317 (Currently all watchpoints go on the bpstat whether hit or not.
2318 That probably could (should) be changed, provided care is taken
2319 with respect to bpstat_explains_signal). */
2320 for (; bs
; bs
= bs
->next
)
2322 val
= print_bp_stop_message (bs
);
2323 if (val
== PRINT_SRC_ONLY
2324 || val
== PRINT_SRC_AND_LOC
2325 || val
== PRINT_NOTHING
)
2329 /* We reached the end of the chain, or we got a null BS to start
2330 with and nothing was printed. */
2331 return PRINT_UNKNOWN
;
2334 /* Evaluate the expression EXP and return 1 if value is zero.
2335 This is used inside a catch_errors to evaluate the breakpoint condition.
2336 The argument is a "struct expression *" that has been cast to char * to
2337 make it pass through catch_errors. */
2340 breakpoint_cond_eval (PTR exp
)
2342 struct value
*mark
= value_mark ();
2343 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2344 value_free_to_mark (mark
);
2348 /* Allocate a new bpstat and chain it to the current one. */
2351 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2355 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2357 bs
->breakpoint_at
= b
;
2358 /* If the condition is false, etc., don't do the commands. */
2359 bs
->commands
= NULL
;
2361 bs
->print_it
= print_it_normal
;
2365 /* Possible return values for watchpoint_check (this can't be an enum
2366 because of check_errors). */
2367 /* The watchpoint has been deleted. */
2368 #define WP_DELETED 1
2369 /* The value has changed. */
2370 #define WP_VALUE_CHANGED 2
2371 /* The value has not changed. */
2372 #define WP_VALUE_NOT_CHANGED 3
2374 #define BP_TEMPFLAG 1
2375 #define BP_HARDWAREFLAG 2
2377 /* Check watchpoint condition. */
2380 watchpoint_check (PTR p
)
2382 bpstat bs
= (bpstat
) p
;
2383 struct breakpoint
*b
;
2384 struct frame_info
*fr
;
2385 int within_current_scope
;
2387 b
= bs
->breakpoint_at
;
2389 if (b
->exp_valid_block
== NULL
)
2390 within_current_scope
= 1;
2393 /* There is no current frame at this moment. If we're going to have
2394 any chance of handling watchpoints on local variables, we'll need
2395 the frame chain (so we can determine if we're in scope). */
2396 reinit_frame_cache ();
2397 fr
= frame_find_by_id (b
->watchpoint_frame
);
2398 within_current_scope
= (fr
!= NULL
);
2399 /* in_function_epilogue_p() returns a non-zero value if we're still
2400 in the function but the stack frame has already been invalidated.
2401 Since we can't rely on the values of local variables after the
2402 stack has been destroyed, we are treating the watchpoint in that
2403 state as `not changed' without further checking. */
2404 if (within_current_scope
&& fr
== get_current_frame ()
2405 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2406 return WP_VALUE_NOT_CHANGED
;
2407 if (within_current_scope
)
2408 /* If we end up stopping, the current frame will get selected
2409 in normal_stop. So this call to select_frame won't affect
2414 if (within_current_scope
)
2416 /* We use value_{,free_to_}mark because it could be a
2417 *long* time before we return to the command level and
2418 call free_all_values. We can't call free_all_values because
2419 we might be in the middle of evaluating a function call. */
2421 struct value
*mark
= value_mark ();
2422 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2423 if (!value_equal (b
->val
, new_val
))
2425 release_value (new_val
);
2426 value_free_to_mark (mark
);
2427 bs
->old_val
= b
->val
;
2429 /* We will stop here */
2430 return WP_VALUE_CHANGED
;
2434 /* Nothing changed, don't do anything. */
2435 value_free_to_mark (mark
);
2436 /* We won't stop here */
2437 return WP_VALUE_NOT_CHANGED
;
2442 /* This seems like the only logical thing to do because
2443 if we temporarily ignored the watchpoint, then when
2444 we reenter the block in which it is valid it contains
2445 garbage (in the case of a function, it may have two
2446 garbage values, one before and one after the prologue).
2447 So we can't even detect the first assignment to it and
2448 watch after that (since the garbage may or may not equal
2449 the first value assigned). */
2450 /* We print all the stop information in print_it_typical(), but
2451 in this case, by the time we call print_it_typical() this bp
2452 will be deleted already. So we have no choice but print the
2453 information here. */
2454 if (ui_out_is_mi_like_p (uiout
))
2455 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2456 ui_out_text (uiout
, "\nWatchpoint ");
2457 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2458 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2459 which its expression is valid.\n");
2461 if (b
->related_breakpoint
)
2462 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2463 b
->disposition
= disp_del_at_next_stop
;
2469 /* Get a bpstat associated with having just stopped at address *PC
2470 and frame address CORE_ADDRESS. Update *PC to point at the
2471 breakpoint (if we hit a breakpoint). NOT_A_SW_BREAKPOINT is nonzero
2472 if this is known to not be a real breakpoint (it could still be a
2473 watchpoint, though). */
2475 /* Determine whether we stopped at a breakpoint, etc, or whether we
2476 don't understand this stop. Result is a chain of bpstat's such that:
2478 if we don't understand the stop, the result is a null pointer.
2480 if we understand why we stopped, the result is not null.
2482 Each element of the chain refers to a particular breakpoint or
2483 watchpoint at which we have stopped. (We may have stopped for
2484 several reasons concurrently.)
2486 Each element of the chain has valid next, breakpoint_at,
2487 commands, FIXME??? fields. */
2490 bpstat_stop_status (CORE_ADDR
*pc
, int not_a_sw_breakpoint
)
2492 register struct breakpoint
*b
, *temp
;
2494 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2495 int real_breakpoint
= 0;
2496 /* Root of the chain of bpstat's */
2497 struct bpstats root_bs
[1];
2498 /* Pointer to the last thing in the chain currently. */
2499 bpstat bs
= root_bs
;
2500 static char message1
[] =
2501 "Error evaluating expression for watchpoint %d\n";
2502 char message
[sizeof (message1
) + 30 /* slop */ ];
2504 /* Get the address where the breakpoint would have been. The
2505 "not_a_sw_breakpoint" argument is meant to distinguish between a
2506 breakpoint trap event and a trace/singlestep trap event. For a
2507 trace/singlestep trap event, we would not want to subtract
2508 DECR_PC_AFTER_BREAK from the PC. */
2510 bp_addr
= *pc
- (not_a_sw_breakpoint
? 0 : DECR_PC_AFTER_BREAK
);
2512 ALL_BREAKPOINTS_SAFE (b
, temp
)
2514 if (b
->enable_state
== bp_disabled
2515 || b
->enable_state
== bp_shlib_disabled
2516 || b
->enable_state
== bp_call_disabled
)
2519 if (b
->type
!= bp_watchpoint
2520 && b
->type
!= bp_hardware_watchpoint
2521 && b
->type
!= bp_read_watchpoint
2522 && b
->type
!= bp_access_watchpoint
2523 && b
->type
!= bp_hardware_breakpoint
2524 && b
->type
!= bp_catch_fork
2525 && b
->type
!= bp_catch_vfork
2526 && b
->type
!= bp_catch_exec
2527 && b
->type
!= bp_catch_catch
2528 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2530 if (b
->address
!= bp_addr
) /* address doesn't match */
2532 if (overlay_debugging
/* unmapped overlay section */
2533 && section_is_overlay (b
->section
)
2534 && !section_is_mapped (b
->section
))
2538 if (b
->type
== bp_hardware_breakpoint
)
2540 if (b
->address
!= (*pc
- DECR_PC_AFTER_HW_BREAK
))
2542 if (overlay_debugging
/* unmapped overlay section */
2543 && section_is_overlay (b
->section
)
2544 && !section_is_mapped (b
->section
))
2548 /* Is this a catchpoint of a load or unload? If so, did we
2549 get a load or unload of the specified library? If not,
2551 if ((b
->type
== bp_catch_load
)
2552 #if defined(SOLIB_HAVE_LOAD_EVENT)
2553 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2554 || ((b
->dll_pathname
!= NULL
)
2555 && (strcmp (b
->dll_pathname
,
2556 SOLIB_LOADED_LIBRARY_PATHNAME (
2557 PIDGET (inferior_ptid
)))
2563 if ((b
->type
== bp_catch_unload
)
2564 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2565 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2566 || ((b
->dll_pathname
!= NULL
)
2567 && (strcmp (b
->dll_pathname
,
2568 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2569 PIDGET (inferior_ptid
)))
2575 if ((b
->type
== bp_catch_fork
)
2576 && !inferior_has_forked (PIDGET (inferior_ptid
),
2577 &b
->forked_inferior_pid
))
2580 if ((b
->type
== bp_catch_vfork
)
2581 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2582 &b
->forked_inferior_pid
))
2585 if ((b
->type
== bp_catch_exec
)
2586 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2589 if (ep_is_exception_catchpoint (b
) &&
2590 !(current_exception_event
= target_get_current_exception_event ()))
2593 /* Come here if it's a watchpoint, or if the break address matches */
2595 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2597 /* Watchpoints may change this, if not found to have triggered. */
2601 sprintf (message
, message1
, b
->number
);
2602 if (b
->type
== bp_watchpoint
||
2603 b
->type
== bp_hardware_watchpoint
)
2605 switch (catch_errors (watchpoint_check
, bs
, message
,
2609 /* We've already printed what needs to be printed. */
2610 /* Actually this is superfluous, because by the time we
2611 call print_it_typical() the wp will be already deleted,
2612 and the function will return immediately. */
2613 bs
->print_it
= print_it_done
;
2616 case WP_VALUE_CHANGED
:
2620 case WP_VALUE_NOT_CHANGED
:
2622 bs
->print_it
= print_it_noop
;
2629 /* Error from catch_errors. */
2630 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2631 if (b
->related_breakpoint
)
2632 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2633 b
->disposition
= disp_del_at_next_stop
;
2634 /* We've already printed what needs to be printed. */
2635 bs
->print_it
= print_it_done
;
2641 else if (b
->type
== bp_read_watchpoint
||
2642 b
->type
== bp_access_watchpoint
)
2648 addr
= target_stopped_data_address ();
2651 for (v
= b
->val_chain
; v
; v
= v
->next
)
2653 if (VALUE_LVAL (v
) == lval_memory
2654 && ! VALUE_LAZY (v
))
2656 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
2658 if (v
== b
->val_chain
2659 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2660 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2664 vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
2665 /* Exact match not required. Within range is
2667 if (addr
>= vaddr
&&
2668 addr
< vaddr
+ TYPE_LENGTH (VALUE_TYPE (v
)))
2674 switch (catch_errors (watchpoint_check
, bs
, message
,
2678 /* We've already printed what needs to be printed. */
2679 bs
->print_it
= print_it_done
;
2682 case WP_VALUE_CHANGED
:
2683 if (b
->type
== bp_read_watchpoint
)
2685 /* Don't stop: read watchpoints shouldn't fire if
2686 the value has changed. This is for targets which
2687 cannot set read-only watchpoints. */
2688 bs
->print_it
= print_it_noop
;
2694 case WP_VALUE_NOT_CHANGED
:
2701 /* Error from catch_errors. */
2702 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2703 if (b
->related_breakpoint
)
2704 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2705 b
->disposition
= disp_del_at_next_stop
;
2706 /* We've already printed what needs to be printed. */
2707 bs
->print_it
= print_it_done
;
2710 else /* found == 0 */
2712 /* This is a case where some watchpoint(s) triggered,
2713 but not at the address of this watchpoint (FOUND
2714 was left zero). So don't print anything for this
2716 bs
->print_it
= print_it_noop
;
2723 /* By definition, an encountered breakpoint is a triggered
2727 real_breakpoint
= 1;
2731 b
->frame
!= (get_current_frame ())->frame
)
2735 int value_is_zero
= 0;
2739 /* Need to select the frame, with all that implies
2740 so that the conditions will have the right context. */
2741 select_frame (get_current_frame ());
2743 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2744 "Error in testing breakpoint condition:\n",
2746 /* FIXME-someday, should give breakpoint # */
2749 if (b
->cond
&& value_is_zero
)
2752 /* Don't consider this a hit. */
2755 else if (b
->ignore_count
> 0)
2758 annotate_ignore_count_change ();
2763 /* We will stop here */
2764 if (b
->disposition
== disp_disable
)
2765 b
->enable_state
= bp_disabled
;
2766 bs
->commands
= copy_command_lines (b
->commands
);
2770 (STREQ ("silent", bs
->commands
->line
) ||
2771 (xdb_commands
&& STREQ ("Q", bs
->commands
->line
))))
2773 bs
->commands
= bs
->commands
->next
;
2778 /* Print nothing for this entry if we dont stop or if we dont print. */
2779 if (bs
->stop
== 0 || bs
->print
== 0)
2780 bs
->print_it
= print_it_noop
;
2783 bs
->next
= NULL
; /* Terminate the chain */
2784 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2786 if (real_breakpoint
&& bs
)
2788 if (bs
->breakpoint_at
->type
== bp_hardware_breakpoint
)
2790 if (DECR_PC_AFTER_HW_BREAK
!= 0)
2792 *pc
= *pc
- DECR_PC_AFTER_HW_BREAK
;
2798 if (DECR_PC_AFTER_BREAK
!= 0 || must_shift_inst_regs
)
2801 #if defined (SHIFT_INST_REGS)
2803 #else /* No SHIFT_INST_REGS. */
2805 #endif /* No SHIFT_INST_REGS. */
2810 /* The value of a hardware watchpoint hasn't changed, but the
2811 intermediate memory locations we are watching may have. */
2812 if (bs
&& !bs
->stop
&&
2813 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2814 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2815 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2817 remove_breakpoints ();
2818 insert_breakpoints ();
2823 /* Tell what to do about this bpstat. */
2825 bpstat_what (bpstat bs
)
2827 /* Classify each bpstat as one of the following. */
2830 /* This bpstat element has no effect on the main_action. */
2833 /* There was a watchpoint, stop but don't print. */
2836 /* There was a watchpoint, stop and print. */
2839 /* There was a breakpoint but we're not stopping. */
2842 /* There was a breakpoint, stop but don't print. */
2845 /* There was a breakpoint, stop and print. */
2848 /* We hit the longjmp breakpoint. */
2851 /* We hit the longjmp_resume breakpoint. */
2854 /* We hit the step_resume breakpoint. */
2857 /* We hit the through_sigtramp breakpoint. */
2860 /* We hit the shared library event breakpoint. */
2863 /* We caught a shared library event. */
2866 /* This is just used to count how many enums there are. */
2870 /* Here is the table which drives this routine. So that we can
2871 format it pretty, we define some abbreviations for the
2872 enum bpstat_what codes. */
2873 #define kc BPSTAT_WHAT_KEEP_CHECKING
2874 #define ss BPSTAT_WHAT_STOP_SILENT
2875 #define sn BPSTAT_WHAT_STOP_NOISY
2876 #define sgl BPSTAT_WHAT_SINGLE
2877 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2878 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2879 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2880 #define sr BPSTAT_WHAT_STEP_RESUME
2881 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2882 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2883 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2885 /* "Can't happen." Might want to print an error message.
2886 abort() is not out of the question, but chances are GDB is just
2887 a bit confused, not unusable. */
2888 #define err BPSTAT_WHAT_STOP_NOISY
2890 /* Given an old action and a class, come up with a new action. */
2891 /* One interesting property of this table is that wp_silent is the same
2892 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2893 after stopping, the check for whether to step over a breakpoint
2894 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2895 reference to how we stopped. We retain separate wp_silent and
2896 bp_silent codes in case we want to change that someday.
2898 Another possibly interesting property of this table is that
2899 there's a partial ordering, priority-like, of the actions. Once
2900 you've decided that some action is appropriate, you'll never go
2901 back and decide something of a lower priority is better. The
2904 kc < clr sgl shl shlr slr sn sr ss ts
2905 sgl < clrs shl shlr slr sn sr ss ts
2906 slr < err shl shlr sn sr ss ts
2907 clr < clrs err shl shlr sn sr ss ts
2908 clrs < err shl shlr sn sr ss ts
2909 ss < shl shlr sn sr ts
2916 What I think this means is that we don't need a damned table
2917 here. If you just put the rows and columns in the right order,
2918 it'd look awfully regular. We could simply walk the bpstat list
2919 and choose the highest priority action we find, with a little
2920 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2921 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2922 is messy anyway). */
2924 /* step_resume entries: a step resume breakpoint overrides another
2925 breakpoint of signal handling (see comment in wait_for_inferior
2926 at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
2927 /* We handle the through_sigtramp_breakpoint the same way; having both
2928 one of those and a step_resume_breakpoint is probably very rare (?). */
2930 static const enum bpstat_what_main_action
2931 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
2934 /* kc ss sn sgl slr clr clrs sr ts shl shlr
2937 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
2939 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
2941 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
2943 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
2945 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
2947 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
2949 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
2951 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
2953 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
2955 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
2957 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
2959 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
2974 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
2975 struct bpstat_what retval
;
2977 retval
.call_dummy
= 0;
2978 for (; bs
!= NULL
; bs
= bs
->next
)
2980 enum class bs_class
= no_effect
;
2981 if (bs
->breakpoint_at
== NULL
)
2982 /* I suspect this can happen if it was a momentary breakpoint
2983 which has since been deleted. */
2985 switch (bs
->breakpoint_at
->type
)
2991 case bp_hardware_breakpoint
:
2997 bs_class
= bp_noisy
;
2999 bs_class
= bp_silent
;
3002 bs_class
= bp_nostop
;
3005 case bp_hardware_watchpoint
:
3006 case bp_read_watchpoint
:
3007 case bp_access_watchpoint
:
3011 bs_class
= wp_noisy
;
3013 bs_class
= wp_silent
;
3016 /* There was a watchpoint, but we're not stopping.
3017 This requires no further action. */
3018 bs_class
= no_effect
;
3021 bs_class
= long_jump
;
3023 case bp_longjmp_resume
:
3024 bs_class
= long_resume
;
3026 case bp_step_resume
:
3029 bs_class
= step_resume
;
3032 /* It is for the wrong frame. */
3033 bs_class
= bp_nostop
;
3035 case bp_through_sigtramp
:
3036 bs_class
= through_sig
;
3038 case bp_watchpoint_scope
:
3039 bs_class
= bp_nostop
;
3041 case bp_shlib_event
:
3042 bs_class
= shlib_event
;
3044 case bp_thread_event
:
3045 case bp_overlay_event
:
3046 bs_class
= bp_nostop
;
3049 case bp_catch_unload
:
3050 /* Only if this catchpoint triggered should we cause the
3051 step-out-of-dld behaviour. Otherwise, we ignore this
3054 bs_class
= catch_shlib_event
;
3056 bs_class
= no_effect
;
3059 case bp_catch_vfork
:
3064 bs_class
= bp_noisy
;
3066 bs_class
= bp_silent
;
3069 /* There was a catchpoint, but we're not stopping.
3070 This requires no further action. */
3071 bs_class
= no_effect
;
3073 case bp_catch_catch
:
3074 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3075 bs_class
= bp_nostop
;
3077 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3079 case bp_catch_throw
:
3080 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3081 bs_class
= bp_nostop
;
3083 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3086 /* Make sure the action is stop (silent or noisy),
3087 so infrun.c pops the dummy frame. */
3088 bs_class
= bp_silent
;
3089 retval
.call_dummy
= 1;
3092 current_action
= table
[(int) bs_class
][(int) current_action
];
3094 retval
.main_action
= current_action
;
3098 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3099 without hardware support). This isn't related to a specific bpstat,
3100 just to things like whether watchpoints are set. */
3103 bpstat_should_step (void)
3105 struct breakpoint
*b
;
3107 if (b
->enable_state
== bp_enabled
&& b
->type
== bp_watchpoint
)
3112 /* Nonzero if there are enabled hardware watchpoints. */
3114 bpstat_have_active_hw_watchpoints (void)
3116 struct breakpoint
*b
;
3118 if ((b
->enable_state
== bp_enabled
) &&
3120 ((b
->type
== bp_hardware_watchpoint
) ||
3121 (b
->type
== bp_read_watchpoint
) ||
3122 (b
->type
== bp_access_watchpoint
)))
3128 /* Given a bpstat that records zero or more triggered eventpoints, this
3129 function returns another bpstat which contains only the catchpoints
3130 on that first list, if any. */
3132 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3134 struct bpstats root_bs
[1];
3135 bpstat bs
= root_bs
;
3136 struct breakpoint
*ep
;
3139 bpstat_clear (cp_list
);
3140 root_bs
->next
= NULL
;
3142 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3144 /* Is this eventpoint a catchpoint? If not, ignore it. */
3145 ep
= ep_list
->breakpoint_at
;
3148 if ((ep
->type
!= bp_catch_load
) &&
3149 (ep
->type
!= bp_catch_unload
) &&
3150 (ep
->type
!= bp_catch_catch
) &&
3151 (ep
->type
!= bp_catch_throw
))
3152 /* pai: (temp) ADD fork/vfork here!! */
3155 /* Yes; add it to the list. */
3156 bs
= bpstat_alloc (ep
, bs
);
3161 #if defined(SOLIB_ADD)
3162 /* Also, for each triggered catchpoint, tag it with the name of
3163 the library that caused this trigger. (We copy the name now,
3164 because it's only guaranteed to be available NOW, when the
3165 catchpoint triggers. Clients who may wish to know the name
3166 later must get it from the catchpoint itself.) */
3167 if (ep
->triggered_dll_pathname
!= NULL
)
3168 xfree (ep
->triggered_dll_pathname
);
3169 if (ep
->type
== bp_catch_load
)
3170 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3171 PIDGET (inferior_ptid
));
3173 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3174 PIDGET (inferior_ptid
));
3176 dll_pathname
= NULL
;
3180 ep
->triggered_dll_pathname
= (char *)
3181 xmalloc (strlen (dll_pathname
) + 1);
3182 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3185 ep
->triggered_dll_pathname
= NULL
;
3191 /* Print B to gdb_stdout. */
3193 print_one_breakpoint (struct breakpoint
*b
,
3194 CORE_ADDR
*last_addr
)
3196 register struct command_line
*l
;
3197 register struct symbol
*sym
;
3198 struct ep_type_description
3203 static struct ep_type_description bptypes
[] =
3205 {bp_none
, "?deleted?"},
3206 {bp_breakpoint
, "breakpoint"},
3207 {bp_hardware_breakpoint
, "hw breakpoint"},
3208 {bp_until
, "until"},
3209 {bp_finish
, "finish"},
3210 {bp_watchpoint
, "watchpoint"},
3211 {bp_hardware_watchpoint
, "hw watchpoint"},
3212 {bp_read_watchpoint
, "read watchpoint"},
3213 {bp_access_watchpoint
, "acc watchpoint"},
3214 {bp_longjmp
, "longjmp"},
3215 {bp_longjmp_resume
, "longjmp resume"},
3216 {bp_step_resume
, "step resume"},
3217 {bp_through_sigtramp
, "sigtramp"},
3218 {bp_watchpoint_scope
, "watchpoint scope"},
3219 {bp_call_dummy
, "call dummy"},
3220 {bp_shlib_event
, "shlib events"},
3221 {bp_thread_event
, "thread events"},
3222 {bp_overlay_event
, "overlay events"},
3223 {bp_catch_load
, "catch load"},
3224 {bp_catch_unload
, "catch unload"},
3225 {bp_catch_fork
, "catch fork"},
3226 {bp_catch_vfork
, "catch vfork"},
3227 {bp_catch_exec
, "catch exec"},
3228 {bp_catch_catch
, "catch catch"},
3229 {bp_catch_throw
, "catch throw"}
3232 static char *bpdisps
[] =
3233 {"del", "dstp", "dis", "keep"};
3234 static char bpenables
[] = "nynny";
3235 char wrap_indent
[80];
3236 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3237 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3240 ui_out_tuple_begin (uiout
, "bkpt");
3244 ui_out_field_int (uiout
, "number", b
->number
);
3248 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3249 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3250 internal_error (__FILE__
, __LINE__
,
3251 "bptypes table does not describe type #%d.",
3253 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3257 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3261 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3262 ui_out_spaces (uiout
, 2);
3265 strcpy (wrap_indent
, " ");
3268 if (TARGET_ADDR_BIT
<= 32)
3269 strcat (wrap_indent
, " ");
3271 strcat (wrap_indent
, " ");
3276 internal_error (__FILE__
, __LINE__
,
3277 "print_one_breakpoint: bp_none encountered\n");
3281 case bp_hardware_watchpoint
:
3282 case bp_read_watchpoint
:
3283 case bp_access_watchpoint
:
3284 /* Field 4, the address, is omitted (which makes the columns
3285 not line up too nicely with the headers, but the effect
3286 is relatively readable). */
3288 ui_out_field_skip (uiout
, "addr");
3290 print_expression (b
->exp
, stb
->stream
);
3291 ui_out_field_stream (uiout
, "what", stb
);
3295 case bp_catch_unload
:
3296 /* Field 4, the address, is omitted (which makes the columns
3297 not line up too nicely with the headers, but the effect
3298 is relatively readable). */
3300 ui_out_field_skip (uiout
, "addr");
3302 if (b
->dll_pathname
== NULL
)
3304 ui_out_field_string (uiout
, "what", "<any library>");
3305 ui_out_spaces (uiout
, 1);
3309 ui_out_text (uiout
, "library \"");
3310 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3311 ui_out_text (uiout
, "\" ");
3316 case bp_catch_vfork
:
3317 /* Field 4, the address, is omitted (which makes the columns
3318 not line up too nicely with the headers, but the effect
3319 is relatively readable). */
3321 ui_out_field_skip (uiout
, "addr");
3323 if (b
->forked_inferior_pid
!= 0)
3325 ui_out_text (uiout
, "process ");
3326 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3327 ui_out_spaces (uiout
, 1);
3331 /* Field 4, the address, is omitted (which makes the columns
3332 not line up too nicely with the headers, but the effect
3333 is relatively readable). */
3335 ui_out_field_skip (uiout
, "addr");
3337 if (b
->exec_pathname
!= NULL
)
3339 ui_out_text (uiout
, "program \"");
3340 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3341 ui_out_text (uiout
, "\" ");
3345 case bp_catch_catch
:
3346 /* Field 4, the address, is omitted (which makes the columns
3347 not line up too nicely with the headers, but the effect
3348 is relatively readable). */
3350 ui_out_field_skip (uiout
, "addr");
3352 ui_out_field_string (uiout
, "what", "exception catch");
3353 ui_out_spaces (uiout
, 1);
3356 case bp_catch_throw
:
3357 /* Field 4, the address, is omitted (which makes the columns
3358 not line up too nicely with the headers, but the effect
3359 is relatively readable). */
3361 ui_out_field_skip (uiout
, "addr");
3363 ui_out_field_string (uiout
, "what", "exception throw");
3364 ui_out_spaces (uiout
, 1);
3368 case bp_hardware_breakpoint
:
3372 case bp_longjmp_resume
:
3373 case bp_step_resume
:
3374 case bp_through_sigtramp
:
3375 case bp_watchpoint_scope
:
3377 case bp_shlib_event
:
3378 case bp_thread_event
:
3379 case bp_overlay_event
:
3383 ui_out_field_core_addr (uiout
, "addr", b
->address
);
3386 *last_addr
= b
->address
;
3389 sym
= find_pc_sect_function (b
->address
, b
->section
);
3392 ui_out_text (uiout
, "in ");
3393 ui_out_field_string (uiout
, "func",
3394 SYMBOL_SOURCE_NAME (sym
));
3395 ui_out_wrap_hint (uiout
, wrap_indent
);
3396 ui_out_text (uiout
, " at ");
3398 ui_out_field_string (uiout
, "file", b
->source_file
);
3399 ui_out_text (uiout
, ":");
3400 ui_out_field_int (uiout
, "line", b
->line_number
);
3404 print_address_symbolic (b
->address
, stb
->stream
, demangle
, "");
3405 ui_out_field_stream (uiout
, "at", stb
);
3410 if (b
->thread
!= -1)
3412 /* FIXME: This seems to be redundant and lost here; see the
3413 "stop only in" line a little further down. */
3414 ui_out_text (uiout
, " thread ");
3415 ui_out_field_int (uiout
, "thread", b
->thread
);
3418 ui_out_text (uiout
, "\n");
3423 ui_out_text (uiout
, "\tstop only in stack frame at ");
3424 ui_out_field_core_addr (uiout
, "frame", b
->frame
);
3425 ui_out_text (uiout
, "\n");
3431 ui_out_text (uiout
, "\tstop only if ");
3432 print_expression (b
->cond
, stb
->stream
);
3433 ui_out_field_stream (uiout
, "cond", stb
);
3434 ui_out_text (uiout
, "\n");
3437 if (b
->thread
!= -1)
3439 /* FIXME should make an annotation for this */
3440 ui_out_text (uiout
, "\tstop only in thread ");
3441 ui_out_field_int (uiout
, "thread", b
->thread
);
3442 ui_out_text (uiout
, "\n");
3445 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3447 /* FIXME should make an annotation for this */
3448 if (ep_is_catchpoint (b
))
3449 ui_out_text (uiout
, "\tcatchpoint");
3451 ui_out_text (uiout
, "\tbreakpoint");
3452 ui_out_text (uiout
, " already hit ");
3453 ui_out_field_int (uiout
, "times", b
->hit_count
);
3454 if (b
->hit_count
== 1)
3455 ui_out_text (uiout
, " time\n");
3457 ui_out_text (uiout
, " times\n");
3460 /* Output the count also if it is zero, but only if this is
3461 mi. FIXME: Should have a better test for this. */
3462 if (ui_out_is_mi_like_p (uiout
))
3463 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3464 ui_out_field_int (uiout
, "times", b
->hit_count
);
3466 if (b
->ignore_count
)
3469 ui_out_text (uiout
, "\tignore next ");
3470 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3471 ui_out_text (uiout
, " hits\n");
3474 if ((l
= b
->commands
))
3477 ui_out_tuple_begin (uiout
, "script");
3478 print_command_lines (uiout
, l
, 4);
3479 ui_out_tuple_end (uiout
);
3481 ui_out_tuple_end (uiout
);
3482 do_cleanups (old_chain
);
3485 struct captured_breakpoint_query_args
3491 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3493 struct captured_breakpoint_query_args
*args
= data
;
3494 register struct breakpoint
*b
;
3495 CORE_ADDR dummy_addr
= 0;
3498 if (args
->bnum
== b
->number
)
3500 print_one_breakpoint (b
, &dummy_addr
);
3508 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
)
3510 struct captured_breakpoint_query_args args
;
3512 /* For the moment we don't trust print_one_breakpoint() to not throw
3514 return catch_exceptions (uiout
, do_captured_breakpoint_query
, &args
,
3515 NULL
, RETURN_MASK_ALL
);
3518 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3519 catchpoints, et.al.). */
3522 user_settable_breakpoint (const struct breakpoint
*b
)
3524 return (b
->type
== bp_breakpoint
3525 || b
->type
== bp_catch_load
3526 || b
->type
== bp_catch_unload
3527 || b
->type
== bp_catch_fork
3528 || b
->type
== bp_catch_vfork
3529 || b
->type
== bp_catch_exec
3530 || b
->type
== bp_catch_catch
3531 || b
->type
== bp_catch_throw
3532 || b
->type
== bp_hardware_breakpoint
3533 || b
->type
== bp_watchpoint
3534 || b
->type
== bp_read_watchpoint
3535 || b
->type
== bp_access_watchpoint
3536 || b
->type
== bp_hardware_watchpoint
);
3539 /* Print information on user settable breakpoint (watchpoint, etc)
3540 number BNUM. If BNUM is -1 print all user settable breakpoints.
3541 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3544 breakpoint_1 (int bnum
, int allflag
)
3546 register struct breakpoint
*b
;
3547 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3548 int nr_printable_breakpoints
;
3550 /* Compute the number of rows in the table. */
3551 nr_printable_breakpoints
= 0;
3554 || bnum
== b
->number
)
3556 if (allflag
|| user_settable_breakpoint (b
))
3557 nr_printable_breakpoints
++;
3561 ui_out_table_begin (uiout
, 6, nr_printable_breakpoints
, "BreakpointTable");
3563 ui_out_table_begin (uiout
, 5, nr_printable_breakpoints
, "BreakpointTable");
3565 if (nr_printable_breakpoints
> 0)
3566 annotate_breakpoints_headers ();
3567 if (nr_printable_breakpoints
> 0)
3569 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3570 if (nr_printable_breakpoints
> 0)
3572 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3573 if (nr_printable_breakpoints
> 0)
3575 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3576 if (nr_printable_breakpoints
> 0)
3578 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3581 if (nr_printable_breakpoints
> 0)
3583 if (TARGET_ADDR_BIT
<= 32)
3584 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3586 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3588 if (nr_printable_breakpoints
> 0)
3590 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3591 ui_out_table_body (uiout
);
3592 if (nr_printable_breakpoints
> 0)
3593 annotate_breakpoints_table ();
3597 || bnum
== b
->number
)
3599 /* We only print out user settable breakpoints unless the
3601 if (allflag
|| user_settable_breakpoint (b
))
3602 print_one_breakpoint (b
, &last_addr
);
3605 ui_out_table_end (uiout
);
3607 if (nr_printable_breakpoints
== 0)
3610 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3612 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3617 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3618 that a comparison of an unsigned with -1 is always false. */
3619 if (last_addr
!= (CORE_ADDR
) -1)
3620 set_next_address (last_addr
);
3623 /* FIXME? Should this be moved up so that it is only called when
3624 there have been breakpoints? */
3625 annotate_breakpoints_table_end ();
3630 breakpoints_info (char *bnum_exp
, int from_tty
)
3635 bnum
= parse_and_eval_long (bnum_exp
);
3637 breakpoint_1 (bnum
, 0);
3642 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3647 bnum
= parse_and_eval_long (bnum_exp
);
3649 breakpoint_1 (bnum
, 1);
3652 /* Print a message describing any breakpoints set at PC. */
3655 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3657 register int others
= 0;
3658 register struct breakpoint
*b
;
3661 if (b
->address
== pc
) /* address match / overlay match */
3662 if (!overlay_debugging
|| b
->section
== section
)
3666 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3668 if (b
->address
== pc
) /* address match / overlay match */
3669 if (!overlay_debugging
|| b
->section
== section
)
3672 printf_filtered ("%d%s%s ",
3674 ((b
->enable_state
== bp_disabled
||
3675 b
->enable_state
== bp_shlib_disabled
||
3676 b
->enable_state
== bp_call_disabled
)
3678 : b
->enable_state
== bp_permanent
3682 : ((others
== 1) ? " and" : ""));
3684 printf_filtered ("also set at pc ");
3685 print_address_numeric (pc
, 1, gdb_stdout
);
3686 printf_filtered (".\n");
3690 /* Set the default place to put a breakpoint
3691 for the `break' command with no arguments. */
3694 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3697 default_breakpoint_valid
= valid
;
3698 default_breakpoint_address
= addr
;
3699 default_breakpoint_symtab
= symtab
;
3700 default_breakpoint_line
= line
;
3703 /* Return true iff it is meaningful to use the address member of
3704 BPT. For some breakpoint types, the address member is irrelevant
3705 and it makes no sense to attempt to compare it to other addresses
3706 (or use it for any other purpose either).
3708 More specifically, each of the following breakpoint types will always
3709 have a zero valued address and we don't want check_duplicates() to mark
3710 breakpoints of any of these types to be a duplicate of an actual
3711 breakpoint at address zero:
3714 bp_hardware_watchpoint
3716 bp_access_watchpoint
3723 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3725 enum bptype type
= bpt
->type
;
3727 return (type
!= bp_watchpoint
3728 && type
!= bp_hardware_watchpoint
3729 && type
!= bp_read_watchpoint
3730 && type
!= bp_access_watchpoint
3731 && type
!= bp_catch_exec
3732 && type
!= bp_longjmp_resume
3733 && type
!= bp_catch_fork
3734 && type
!= bp_catch_vfork
);
3737 /* Rescan breakpoints at the same address and section as BPT,
3738 marking the first one as "first" and any others as "duplicates".
3739 This is so that the bpt instruction is only inserted once.
3740 If we have a permanent breakpoint at the same place as BPT, make
3741 that one the official one, and the rest as duplicates. */
3744 check_duplicates (struct breakpoint
*bpt
)
3746 register struct breakpoint
*b
;
3747 register int count
= 0;
3748 struct breakpoint
*perm_bp
= 0;
3749 CORE_ADDR address
= bpt
->address
;
3750 asection
*section
= bpt
->section
;
3752 if (! breakpoint_address_is_meaningful (bpt
))
3756 if (b
->enable_state
!= bp_disabled
3757 && b
->enable_state
!= bp_shlib_disabled
3758 && b
->enable_state
!= bp_call_disabled
3759 && b
->address
== address
/* address / overlay match */
3760 && (!overlay_debugging
|| b
->section
== section
)
3761 && breakpoint_address_is_meaningful (b
))
3763 /* Have we found a permanent breakpoint? */
3764 if (b
->enable_state
== bp_permanent
)
3771 b
->duplicate
= count
> 1;
3774 /* If we found a permanent breakpoint at this address, go over the
3775 list again and declare all the other breakpoints there to be the
3779 perm_bp
->duplicate
= 0;
3781 /* Permanent breakpoint should always be inserted. */
3782 if (! perm_bp
->inserted
)
3783 internal_error (__FILE__
, __LINE__
,
3784 "allegedly permanent breakpoint is not "
3785 "actually inserted");
3791 internal_error (__FILE__
, __LINE__
,
3792 "another breakpoint was inserted on top of "
3793 "a permanent breakpoint");
3795 if (b
->enable_state
!= bp_disabled
3796 && b
->enable_state
!= bp_shlib_disabled
3797 && b
->enable_state
!= bp_call_disabled
3798 && b
->address
== address
/* address / overlay match */
3799 && (!overlay_debugging
|| b
->section
== section
)
3800 && breakpoint_address_is_meaningful (b
))
3806 /* set_raw_breakpoint() is a low level routine for allocating and
3807 partially initializing a breakpoint of type BPTYPE. The newly
3808 created breakpoint's address, section, source file name, and line
3809 number are provided by SAL. The newly created and partially
3810 initialized breakpoint is added to the breakpoint chain and
3811 is also returned as the value of this function.
3813 It is expected that the caller will complete the initialization of
3814 the newly created breakpoint struct as well as output any status
3815 information regarding the creation of a new breakpoint. In
3816 particular, set_raw_breakpoint() does NOT set the breakpoint
3817 number! Care should be taken to not allow an error() to occur
3818 prior to completing the initialization of the breakpoint. If this
3819 should happen, a bogus breakpoint will be left on the chain. */
3822 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
3824 register struct breakpoint
*b
, *b1
;
3826 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
3827 memset (b
, 0, sizeof (*b
));
3828 b
->address
= sal
.pc
;
3829 if (sal
.symtab
== NULL
)
3830 b
->source_file
= NULL
;
3832 b
->source_file
= savestring (sal
.symtab
->filename
,
3833 strlen (sal
.symtab
->filename
));
3834 b
->section
= sal
.section
;
3836 b
->language
= current_language
->la_language
;
3837 b
->input_radix
= input_radix
;
3839 b
->line_number
= sal
.line
;
3840 b
->enable_state
= bp_enabled
;
3843 b
->ignore_count
= 0;
3846 b
->dll_pathname
= NULL
;
3847 b
->triggered_dll_pathname
= NULL
;
3848 b
->forked_inferior_pid
= 0;
3849 b
->exec_pathname
= NULL
;
3851 /* Add this breakpoint to the end of the chain
3852 so that a list of breakpoints will come out in order
3853 of increasing numbers. */
3855 b1
= breakpoint_chain
;
3857 breakpoint_chain
= b
;
3865 check_duplicates (b
);
3866 breakpoints_changed ();
3872 /* Note that the breakpoint object B describes a permanent breakpoint
3873 instruction, hard-wired into the inferior's code. */
3875 make_breakpoint_permanent (struct breakpoint
*b
)
3877 b
->enable_state
= bp_permanent
;
3879 /* By definition, permanent breakpoints are already present in the code. */
3883 static struct breakpoint
*
3884 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
3886 static int internal_breakpoint_number
= -1;
3887 struct symtab_and_line sal
;
3888 struct breakpoint
*b
;
3890 init_sal (&sal
); /* initialize to zeroes */
3893 sal
.section
= find_pc_overlay (sal
.pc
);
3895 b
= set_raw_breakpoint (sal
, type
);
3896 b
->number
= internal_breakpoint_number
--;
3897 b
->disposition
= disp_donttouch
;
3904 create_longjmp_breakpoint (char *func_name
)
3906 struct breakpoint
*b
;
3907 struct minimal_symbol
*m
;
3909 if (func_name
== NULL
)
3910 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
3913 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
, NULL
)) == NULL
)
3916 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
3919 b
->enable_state
= bp_disabled
;
3922 b
->addr_string
= xstrdup (func_name
);
3925 /* Call this routine when stepping and nexting to enable a breakpoint
3926 if we do a longjmp(). When we hit that breakpoint, call
3927 set_longjmp_resume_breakpoint() to figure out where we are going. */
3930 enable_longjmp_breakpoint (void)
3932 register struct breakpoint
*b
;
3935 if (b
->type
== bp_longjmp
)
3937 b
->enable_state
= bp_enabled
;
3938 check_duplicates (b
);
3943 disable_longjmp_breakpoint (void)
3945 register struct breakpoint
*b
;
3948 if (b
->type
== bp_longjmp
3949 || b
->type
== bp_longjmp_resume
)
3951 b
->enable_state
= bp_disabled
;
3952 check_duplicates (b
);
3957 create_overlay_event_breakpoint (char *func_name
)
3959 struct breakpoint
*b
;
3960 struct minimal_symbol
*m
;
3962 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
, NULL
)) == NULL
)
3965 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
3967 b
->addr_string
= xstrdup (func_name
);
3969 if (overlay_debugging
== ovly_auto
)
3971 b
->enable_state
= bp_enabled
;
3972 overlay_events_enabled
= 1;
3976 b
->enable_state
= bp_disabled
;
3977 overlay_events_enabled
= 0;
3982 enable_overlay_breakpoints (void)
3984 register struct breakpoint
*b
;
3987 if (b
->type
== bp_overlay_event
)
3989 b
->enable_state
= bp_enabled
;
3990 check_duplicates (b
);
3991 overlay_events_enabled
= 1;
3996 disable_overlay_breakpoints (void)
3998 register struct breakpoint
*b
;
4001 if (b
->type
== bp_overlay_event
)
4003 b
->enable_state
= bp_disabled
;
4004 check_duplicates (b
);
4005 overlay_events_enabled
= 0;
4010 create_thread_event_breakpoint (CORE_ADDR address
)
4012 struct breakpoint
*b
;
4013 char addr_string
[80]; /* Surely an addr can't be longer than that. */
4015 b
= create_internal_breakpoint (address
, bp_thread_event
);
4017 b
->enable_state
= bp_enabled
;
4018 /* addr_string has to be used or breakpoint_re_set will delete me. */
4019 sprintf (addr_string
, "*0x%s", paddr (b
->address
));
4020 b
->addr_string
= xstrdup (addr_string
);
4026 remove_thread_event_breakpoints (void)
4028 struct breakpoint
*b
, *temp
;
4030 ALL_BREAKPOINTS_SAFE (b
, temp
)
4031 if (b
->type
== bp_thread_event
)
4032 delete_breakpoint (b
);
4037 remove_solib_event_breakpoints (void)
4039 register struct breakpoint
*b
, *temp
;
4041 ALL_BREAKPOINTS_SAFE (b
, temp
)
4042 if (b
->type
== bp_shlib_event
)
4043 delete_breakpoint (b
);
4047 create_solib_event_breakpoint (CORE_ADDR address
)
4049 struct breakpoint
*b
;
4051 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4055 /* Disable any breakpoints that are on code in shared libraries. Only
4056 apply to enabled breakpoints, disabled ones can just stay disabled. */
4059 disable_breakpoints_in_shlibs (int silent
)
4061 struct breakpoint
*b
;
4062 int disabled_shlib_breaks
= 0;
4064 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4067 #if defined (PC_SOLIB)
4068 if (((b
->type
== bp_breakpoint
) ||
4069 (b
->type
== bp_hardware_breakpoint
)) &&
4070 b
->enable_state
== bp_enabled
&&
4072 PC_SOLIB (b
->address
))
4074 b
->enable_state
= bp_shlib_disabled
;
4077 if (!disabled_shlib_breaks
)
4079 target_terminal_ours_for_output ();
4080 warning ("Temporarily disabling shared library breakpoints:");
4082 disabled_shlib_breaks
= 1;
4083 warning ("breakpoint #%d ", b
->number
);
4090 /* Try to reenable any breakpoints in shared libraries. */
4092 re_enable_breakpoints_in_shlibs (void)
4094 struct breakpoint
*b
;
4097 if (b
->enable_state
== bp_shlib_disabled
)
4101 /* Do not reenable the breakpoint if the shared library
4102 is still not mapped in. */
4103 if (target_read_memory (b
->address
, buf
, 1) == 0)
4104 b
->enable_state
= bp_enabled
;
4111 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4112 char *cond_string
, enum bptype bp_kind
)
4114 struct breakpoint
*b
;
4115 struct symtabs_and_lines sals
;
4116 struct cleanup
*old_chain
;
4117 struct cleanup
*canonical_strings_chain
= NULL
;
4118 char *addr_start
= hookname
;
4119 char *addr_end
= NULL
;
4120 char **canonical
= (char **) NULL
;
4121 int thread
= -1; /* All threads. */
4123 /* Set a breakpoint on the specified hook. */
4124 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
, 0, &canonical
);
4125 addr_end
= hookname
;
4127 if (sals
.nelts
== 0)
4129 warning ("Unable to set a breakpoint on dynamic linker callback.");
4130 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4131 warning ("GDB will be unable to track shl_load/shl_unload calls");
4134 if (sals
.nelts
!= 1)
4136 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4137 warning ("GDB will be unable to track shl_load/shl_unload calls");
4141 /* Make sure that all storage allocated in decode_line_1 gets freed
4142 in case the following errors out. */
4143 old_chain
= make_cleanup (xfree
, sals
.sals
);
4144 if (canonical
!= (char **) NULL
)
4146 make_cleanup (xfree
, canonical
);
4147 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4148 if (canonical
[0] != NULL
)
4149 make_cleanup (xfree
, canonical
[0]);
4152 resolve_sal_pc (&sals
.sals
[0]);
4154 /* Remove the canonical strings from the cleanup, they are needed below. */
4155 if (canonical
!= (char **) NULL
)
4156 discard_cleanups (canonical_strings_chain
);
4158 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4159 set_breakpoint_count (breakpoint_count
+ 1);
4160 b
->number
= breakpoint_count
;
4162 b
->cond_string
= (cond_string
== NULL
) ?
4163 NULL
: savestring (cond_string
, strlen (cond_string
));
4166 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4167 b
->addr_string
= canonical
[0];
4168 else if (addr_start
)
4169 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4171 b
->enable_state
= bp_enabled
;
4172 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4174 if (dll_pathname
== NULL
)
4175 b
->dll_pathname
= NULL
;
4178 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4179 strcpy (b
->dll_pathname
, dll_pathname
);
4183 do_cleanups (old_chain
);
4187 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4188 char *dll_pathname
, char *cond_string
)
4190 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4191 cond_string
, bp_catch_load
);
4195 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4196 char *dll_pathname
, char *cond_string
)
4198 solib_load_unload_1 (hookname
,tempflag
, dll_pathname
,
4199 cond_string
, bp_catch_unload
);
4203 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4204 enum bptype bp_kind
)
4206 struct symtab_and_line sal
;
4207 struct breakpoint
*b
;
4208 int thread
= -1; /* All threads. */
4215 b
= set_raw_breakpoint (sal
, bp_kind
);
4216 set_breakpoint_count (breakpoint_count
+ 1);
4217 b
->number
= breakpoint_count
;
4219 b
->cond_string
= (cond_string
== NULL
) ?
4220 NULL
: savestring (cond_string
, strlen (cond_string
));
4222 b
->addr_string
= NULL
;
4223 b
->enable_state
= bp_enabled
;
4224 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4225 b
->forked_inferior_pid
= 0;
4231 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4233 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4237 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4239 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4243 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4245 struct symtab_and_line sal
;
4246 struct breakpoint
*b
;
4247 int thread
= -1; /* All threads. */
4254 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4255 set_breakpoint_count (breakpoint_count
+ 1);
4256 b
->number
= breakpoint_count
;
4258 b
->cond_string
= (cond_string
== NULL
) ?
4259 NULL
: savestring (cond_string
, strlen (cond_string
));
4261 b
->addr_string
= NULL
;
4262 b
->enable_state
= bp_enabled
;
4263 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4269 hw_breakpoint_used_count (void)
4271 register struct breakpoint
*b
;
4276 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4284 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4286 register struct breakpoint
*b
;
4289 *other_type_used
= 0;
4292 if (b
->enable_state
== bp_enabled
)
4294 if (b
->type
== type
)
4296 else if ((b
->type
== bp_hardware_watchpoint
||
4297 b
->type
== bp_read_watchpoint
||
4298 b
->type
== bp_access_watchpoint
)
4299 && b
->enable_state
== bp_enabled
)
4300 *other_type_used
= 1;
4306 /* Call this after hitting the longjmp() breakpoint. Use this to set
4307 a new breakpoint at the target of the jmp_buf.
4309 FIXME - This ought to be done by setting a temporary breakpoint
4310 that gets deleted automatically... */
4313 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_info
*frame
)
4315 register struct breakpoint
*b
;
4318 if (b
->type
== bp_longjmp_resume
)
4321 b
->enable_state
= bp_enabled
;
4323 b
->frame
= frame
->frame
;
4326 check_duplicates (b
);
4332 disable_watchpoints_before_interactive_call_start (void)
4334 struct breakpoint
*b
;
4338 if (((b
->type
== bp_watchpoint
)
4339 || (b
->type
== bp_hardware_watchpoint
)
4340 || (b
->type
== bp_read_watchpoint
)
4341 || (b
->type
== bp_access_watchpoint
)
4342 || ep_is_exception_catchpoint (b
))
4343 && (b
->enable_state
== bp_enabled
))
4345 b
->enable_state
= bp_call_disabled
;
4346 check_duplicates (b
);
4352 enable_watchpoints_after_interactive_call_stop (void)
4354 struct breakpoint
*b
;
4358 if (((b
->type
== bp_watchpoint
)
4359 || (b
->type
== bp_hardware_watchpoint
)
4360 || (b
->type
== bp_read_watchpoint
)
4361 || (b
->type
== bp_access_watchpoint
)
4362 || ep_is_exception_catchpoint (b
))
4363 && (b
->enable_state
== bp_call_disabled
))
4365 b
->enable_state
= bp_enabled
;
4366 check_duplicates (b
);
4372 /* Set a breakpoint that will evaporate an end of command
4373 at address specified by SAL.
4374 Restrict it to frame FRAME if FRAME is nonzero. */
4377 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_info
*frame
,
4380 register struct breakpoint
*b
;
4381 b
= set_raw_breakpoint (sal
, type
);
4382 b
->enable_state
= bp_enabled
;
4383 b
->disposition
= disp_donttouch
;
4384 b
->frame
= (frame
? frame
->frame
: 0);
4386 /* If we're debugging a multi-threaded program, then we
4387 want momentary breakpoints to be active in only a
4388 single thread of control. */
4389 if (in_thread_list (inferior_ptid
))
4390 b
->thread
= pid_to_thread_id (inferior_ptid
);
4396 /* Tell the user we have just set a breakpoint B. */
4399 mention (struct breakpoint
*b
)
4402 struct cleanup
*old_chain
;
4403 struct ui_stream
*stb
;
4405 stb
= ui_out_stream_new (uiout
);
4406 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4408 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4409 watchpoint) other than breakpoint creation. It should be possible to
4410 clean this up and at the same time replace the random calls to
4411 breakpoint_changed with this hook, as has already been done for
4412 delete_breakpoint_hook and so on. */
4413 if (create_breakpoint_hook
)
4414 create_breakpoint_hook (b
);
4415 breakpoint_create_event (b
->number
);
4420 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4423 ui_out_text (uiout
, "Watchpoint ");
4424 ui_out_tuple_begin (uiout
, "wpt");
4425 ui_out_field_int (uiout
, "number", b
->number
);
4426 ui_out_text (uiout
, ": ");
4427 print_expression (b
->exp
, stb
->stream
);
4428 ui_out_field_stream (uiout
, "exp", stb
);
4429 ui_out_tuple_end (uiout
);
4431 case bp_hardware_watchpoint
:
4432 ui_out_text (uiout
, "Hardware watchpoint ");
4433 ui_out_tuple_begin (uiout
, "wpt");
4434 ui_out_field_int (uiout
, "number", b
->number
);
4435 ui_out_text (uiout
, ": ");
4436 print_expression (b
->exp
, stb
->stream
);
4437 ui_out_field_stream (uiout
, "exp", stb
);
4438 ui_out_tuple_end (uiout
);
4440 case bp_read_watchpoint
:
4441 ui_out_text (uiout
, "Hardware read watchpoint ");
4442 ui_out_tuple_begin (uiout
, "hw-rwpt");
4443 ui_out_field_int (uiout
, "number", b
->number
);
4444 ui_out_text (uiout
, ": ");
4445 print_expression (b
->exp
, stb
->stream
);
4446 ui_out_field_stream (uiout
, "exp", stb
);
4447 ui_out_tuple_end (uiout
);
4449 case bp_access_watchpoint
:
4450 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4451 ui_out_tuple_begin (uiout
, "hw-awpt");
4452 ui_out_field_int (uiout
, "number", b
->number
);
4453 ui_out_text (uiout
, ": ");
4454 print_expression (b
->exp
, stb
->stream
);
4455 ui_out_field_stream (uiout
, "exp", stb
);
4456 ui_out_tuple_end (uiout
);
4459 if (ui_out_is_mi_like_p (uiout
))
4464 printf_filtered ("Breakpoint %d", b
->number
);
4467 case bp_hardware_breakpoint
:
4468 if (ui_out_is_mi_like_p (uiout
))
4473 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4477 case bp_catch_unload
:
4478 printf_filtered ("Catchpoint %d (%s %s)",
4480 (b
->type
== bp_catch_load
) ? "load" : "unload",
4481 (b
->dll_pathname
!= NULL
) ?
4482 b
->dll_pathname
: "<any library>");
4485 case bp_catch_vfork
:
4486 printf_filtered ("Catchpoint %d (%s)",
4488 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4491 printf_filtered ("Catchpoint %d (exec)",
4494 case bp_catch_catch
:
4495 case bp_catch_throw
:
4496 printf_filtered ("Catchpoint %d (%s)",
4498 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4504 case bp_longjmp_resume
:
4505 case bp_step_resume
:
4506 case bp_through_sigtramp
:
4508 case bp_watchpoint_scope
:
4509 case bp_shlib_event
:
4510 case bp_thread_event
:
4511 case bp_overlay_event
:
4516 if (addressprint
|| b
->source_file
== NULL
)
4518 printf_filtered (" at ");
4519 print_address_numeric (b
->address
, 1, gdb_stdout
);
4522 printf_filtered (": file %s, line %d.",
4523 b
->source_file
, b
->line_number
);
4525 do_cleanups (old_chain
);
4526 if (ui_out_is_mi_like_p (uiout
))
4528 printf_filtered ("\n");
4532 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4533 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4534 COND[i] and COND_STRING[i] values.
4536 NOTE: If the function succeeds, the caller is expected to cleanup
4537 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4538 array contents). If the function fails (error() is called), the
4539 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4540 COND and SALS arrays and each of those arrays contents. */
4543 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4544 struct expression
**cond
, char **cond_string
,
4545 enum bptype type
, enum bpdisp disposition
,
4546 int thread
, int ignore_count
, int from_tty
)
4548 if (type
== bp_hardware_breakpoint
)
4550 int i
= hw_breakpoint_used_count ();
4551 int target_resources_ok
=
4552 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4554 if (target_resources_ok
== 0)
4555 error ("No hardware breakpoint support in the target.");
4556 else if (target_resources_ok
< 0)
4557 error ("Hardware breakpoints used exceeds limit.");
4560 /* Now set all the breakpoints. */
4563 for (i
= 0; i
< sals
.nelts
; i
++)
4565 struct breakpoint
*b
;
4566 struct symtab_and_line sal
= sals
.sals
[i
];
4569 describe_other_breakpoints (sal
.pc
, sal
.section
);
4571 b
= set_raw_breakpoint (sal
, type
);
4572 set_breakpoint_count (breakpoint_count
+ 1);
4573 b
->number
= breakpoint_count
;
4576 b
->addr_string
= addr_string
[i
];
4577 b
->cond_string
= cond_string
[i
];
4578 b
->ignore_count
= ignore_count
;
4579 b
->enable_state
= bp_enabled
;
4580 b
->disposition
= disposition
;
4586 /* Parse ARG which is assumed to be a SAL specification possibly
4587 followed by conditionals. On return, SALS contains an array of SAL
4588 addresses found. ADDR_STRING contains a vector of (canonical)
4589 address strings. ARG points to the end of the SAL. */
4592 parse_breakpoint_sals (char **address
,
4593 struct symtabs_and_lines
*sals
,
4594 char ***addr_string
)
4596 char *addr_start
= *address
;
4597 *addr_string
= NULL
;
4598 /* If no arg given, or if first arg is 'if ', use the default
4600 if ((*address
) == NULL
4601 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4603 if (default_breakpoint_valid
)
4605 struct symtab_and_line sal
;
4606 init_sal (&sal
); /* initialize to zeroes */
4607 sals
->sals
= (struct symtab_and_line
*)
4608 xmalloc (sizeof (struct symtab_and_line
));
4609 sal
.pc
= default_breakpoint_address
;
4610 sal
.line
= default_breakpoint_line
;
4611 sal
.symtab
= default_breakpoint_symtab
;
4612 sal
.section
= find_pc_overlay (sal
.pc
);
4613 sals
->sals
[0] = sal
;
4617 error ("No default breakpoint address now.");
4621 /* Force almost all breakpoints to be in terms of the
4622 current_source_symtab (which is decode_line_1's default). This
4623 should produce the results we want almost all of the time while
4624 leaving default_breakpoint_* alone.
4625 ObjC: However, don't match an Objective-C method name which
4626 may have a '+' or '-' succeeded by a '[' */
4628 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
4630 if (default_breakpoint_valid
4632 || ((strchr ("+-", (*address
)[0]) != NULL
)
4633 && ((*address
)[1] != '['))))
4634 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
4635 default_breakpoint_line
, addr_string
);
4637 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0, addr_string
);
4639 /* For any SAL that didn't have a canonical string, fill one in. */
4640 if (sals
->nelts
> 0 && *addr_string
== NULL
)
4641 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
4642 if (addr_start
!= (*address
))
4645 for (i
= 0; i
< sals
->nelts
; i
++)
4647 /* Add the string if not present. */
4648 if ((*addr_string
)[i
] == NULL
)
4649 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
4655 /* Convert each SAL into a real PC. Verify that the PC can be
4656 inserted as a breakpoint. If it can't throw an error. */
4659 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
4663 for (i
= 0; i
< sals
->nelts
; i
++)
4665 resolve_sal_pc (&sals
->sals
[i
]);
4667 /* It's possible for the PC to be nonzero, but still an illegal
4668 value on some targets.
4670 For example, on HP-UX if you start gdb, and before running the
4671 inferior you try to set a breakpoint on a shared library function
4672 "foo" where the inferior doesn't call "foo" directly but does
4673 pass its address to another function call, then we do find a
4674 minimal symbol for the "foo", but it's address is invalid.
4675 (Appears to be an index into a table that the loader sets up
4676 when the inferior is run.)
4678 Give the target a chance to bless sals.sals[i].pc before we
4679 try to make a breakpoint for it. */
4680 if (PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
4682 if (address
== NULL
)
4683 error ("Cannot break without a running program.");
4685 error ("Cannot break on %s without a running program.",
4691 /* Set a breakpoint according to ARG (function, linenum or *address)
4692 flag: first bit : 0 non-temporary, 1 temporary.
4693 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4696 break_command_1 (char *arg
, int flag
, int from_tty
)
4698 int tempflag
, hardwareflag
;
4699 struct symtabs_and_lines sals
;
4700 register struct expression
**cond
= 0;
4701 /* Pointers in arg to the start, and one past the end, of the
4703 char **cond_string
= (char **) NULL
;
4704 char *addr_start
= arg
;
4706 struct cleanup
*old_chain
;
4707 struct cleanup
*breakpoint_chain
= NULL
;
4710 int ignore_count
= 0;
4712 hardwareflag
= flag
& BP_HARDWAREFLAG
;
4713 tempflag
= flag
& BP_TEMPFLAG
;
4718 parse_breakpoint_sals (&arg
, &sals
, &addr_string
);
4723 /* Create a chain of things that always need to be cleaned up. */
4724 old_chain
= make_cleanup (null_cleanup
, 0);
4726 /* Make sure that all storage allocated to SALS gets freed. */
4727 make_cleanup (xfree
, sals
.sals
);
4729 /* Cleanup the addr_string array but not its contents. */
4730 make_cleanup (xfree
, addr_string
);
4732 /* Allocate space for all the cond expressions. */
4733 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4734 make_cleanup (xfree
, cond
);
4736 /* Allocate space for all the cond strings. */
4737 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4738 make_cleanup (xfree
, cond_string
);
4740 /* ----------------------------- SNIP -----------------------------
4741 Anything added to the cleanup chain beyond this point is assumed
4742 to be part of a breakpoint. If the breakpoint create succeeds
4743 then the memory is not reclaimed. */
4744 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4746 /* Mark the contents of the addr_string for cleanup. These go on
4747 the breakpoint_chain and only occure if the breakpoint create
4749 for (i
= 0; i
< sals
.nelts
; i
++)
4751 if (addr_string
[i
] != NULL
)
4752 make_cleanup (xfree
, addr_string
[i
]);
4755 /* Resolve all line numbers to PC's and verify that the addresses
4756 are ok for the target. */
4757 breakpoint_sals_to_pc (&sals
, addr_start
);
4759 /* Verify that condition can be parsed, before setting any
4760 breakpoints. Allocate a separate condition expression for each
4762 thread
= -1; /* No specific thread yet */
4763 for (i
= 0; i
< sals
.nelts
; i
++)
4770 char *cond_start
= NULL
;
4771 char *cond_end
= NULL
;
4772 while (*tok
== ' ' || *tok
== '\t')
4777 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
4780 toklen
= end_tok
- tok
;
4782 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
4784 tok
= cond_start
= end_tok
+ 1;
4785 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4786 make_cleanup (xfree
, cond
[i
]);
4788 cond_string
[i
] = savestring (cond_start
, cond_end
- cond_start
);
4789 make_cleanup (xfree
, cond_string
[i
]);
4791 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
4797 thread
= strtol (tok
, &tok
, 0);
4799 error ("Junk after thread keyword.");
4800 if (!valid_thread_id (thread
))
4801 error ("Unknown thread %d\n", thread
);
4804 error ("Junk at end of arguments.");
4808 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
4809 hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
4810 tempflag
? disp_del
: disp_donttouch
,
4811 thread
, ignore_count
, from_tty
);
4815 warning ("Multiple breakpoints were set.");
4816 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
4818 /* That's it. Discard the cleanups for data inserted into the
4820 discard_cleanups (breakpoint_chain
);
4821 /* But cleanup everything else. */
4822 do_cleanups (old_chain
);
4825 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
4826 linenum or *address) with COND and IGNORE_COUNT. */
4828 struct captured_breakpoint_args
4839 do_captured_breakpoint (void *data
)
4841 struct captured_breakpoint_args
*args
= data
;
4842 struct symtabs_and_lines sals
;
4843 register struct expression
**cond
;
4844 struct cleanup
*old_chain
;
4845 struct cleanup
*breakpoint_chain
= NULL
;
4852 /* Parse the source and lines spec. Delay check that the expression
4853 didn't contain trailing garbage until after cleanups are in
4857 address_end
= args
->address
;
4859 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
);
4864 /* Create a chain of things at always need to be cleaned up. */
4865 old_chain
= make_cleanup (null_cleanup
, 0);
4867 /* Always have a addr_string array, even if it is empty. */
4868 make_cleanup (xfree
, addr_string
);
4870 /* Make sure that all storage allocated to SALS gets freed. */
4871 make_cleanup (xfree
, sals
.sals
);
4873 /* Allocate space for all the cond expressions. */
4874 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4875 make_cleanup (xfree
, cond
);
4877 /* Allocate space for all the cond strings. */
4878 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4879 make_cleanup (xfree
, cond_string
);
4881 /* ----------------------------- SNIP -----------------------------
4882 Anything added to the cleanup chain beyond this point is assumed
4883 to be part of a breakpoint. If the breakpoint create goes
4884 through then that memory is not cleaned up. */
4885 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4887 /* Mark the contents of the addr_string for cleanup. These go on
4888 the breakpoint_chain and only occure if the breakpoint create
4890 for (i
= 0; i
< sals
.nelts
; i
++)
4892 if (addr_string
[i
] != NULL
)
4893 make_cleanup (xfree
, addr_string
[i
]);
4896 /* Wait until now before checking for garbage at the end of the
4897 address. That way cleanups can take care of freeing any
4899 if (*address_end
!= '\0')
4900 error ("Garbage %s following breakpoint address", address_end
);
4902 /* Resolve all line numbers to PC's. */
4903 breakpoint_sals_to_pc (&sals
, args
->address
);
4905 /* Verify that conditions can be parsed, before setting any
4907 for (i
= 0; i
< sals
.nelts
; i
++)
4909 if (args
->condition
!= NULL
)
4911 char *tok
= args
->condition
;
4912 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4914 error ("Garbage %s follows condition", tok
);
4915 make_cleanup (xfree
, cond
[i
]);
4916 cond_string
[i
] = xstrdup (args
->condition
);
4920 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
4921 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
4922 args
->tempflag
? disp_del
: disp_donttouch
,
4923 args
->thread
, args
->ignore_count
, 0/*from-tty*/);
4925 /* That's it. Discard the cleanups for data inserted into the
4927 discard_cleanups (breakpoint_chain
);
4928 /* But cleanup everything else. */
4929 do_cleanups (old_chain
);
4934 gdb_breakpoint (char *address
, char *condition
,
4935 int hardwareflag
, int tempflag
,
4936 int thread
, int ignore_count
)
4938 struct captured_breakpoint_args args
;
4939 args
.address
= address
;
4940 args
.condition
= condition
;
4941 args
.hardwareflag
= hardwareflag
;
4942 args
.tempflag
= tempflag
;
4943 args
.thread
= thread
;
4944 args
.ignore_count
= ignore_count
;
4945 return catch_errors (do_captured_breakpoint
, &args
,
4946 NULL
, RETURN_MASK_ALL
);
4951 break_at_finish_at_depth_command_1 (char *arg
, int flag
, int from_tty
)
4953 struct frame_info
*frame
;
4954 CORE_ADDR low
, high
, selected_pc
= 0;
4955 char *extra_args
= NULL
;
4958 int extra_args_len
= 0, if_arg
= 0;
4961 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
4964 if (default_breakpoint_valid
)
4966 if (deprecated_selected_frame
)
4968 selected_pc
= deprecated_selected_frame
->pc
;
4973 error ("No selected frame.");
4976 error ("No default breakpoint address now.");
4980 extra_args
= strchr (arg
, ' ');
4984 extra_args_len
= strlen (extra_args
);
4985 level_arg
= (char *) xmalloc (extra_args
- arg
);
4986 strncpy (level_arg
, arg
, extra_args
- arg
- 1);
4987 level_arg
[extra_args
- arg
- 1] = '\0';
4991 level_arg
= (char *) xmalloc (strlen (arg
) + 1);
4992 strcpy (level_arg
, arg
);
4995 frame
= parse_frame_specification (level_arg
);
4997 selected_pc
= frame
->pc
;
5004 extra_args_len
= strlen (arg
);
5009 if (find_pc_partial_function (selected_pc
, (char **) NULL
, &low
, &high
))
5011 addr_string
= (char *) xmalloc (26 + extra_args_len
);
5013 sprintf (addr_string
, "*0x%s %s", paddr_nz (high
), extra_args
);
5015 sprintf (addr_string
, "*0x%s", paddr_nz (high
));
5016 break_command_1 (addr_string
, flag
, from_tty
);
5017 xfree (addr_string
);
5020 error ("No function contains the specified address");
5023 error ("Unable to set breakpoint at procedure exit");
5028 break_at_finish_command_1 (char *arg
, int flag
, int from_tty
)
5030 char *addr_string
, *break_string
, *beg_addr_string
;
5031 CORE_ADDR low
, high
;
5032 struct symtabs_and_lines sals
;
5033 struct symtab_and_line sal
;
5034 struct cleanup
*old_chain
;
5035 char *extra_args
= NULL
;
5036 int extra_args_len
= 0;
5040 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5042 if (default_breakpoint_valid
)
5044 if (deprecated_selected_frame
)
5046 addr_string
= (char *) xmalloc (15);
5047 sprintf (addr_string
, "*0x%s", paddr_nz (deprecated_selected_frame
->pc
));
5052 error ("No selected frame.");
5055 error ("No default breakpoint address now.");
5059 addr_string
= (char *) xmalloc (strlen (arg
) + 1);
5060 strcpy (addr_string
, arg
);
5066 extra_args_len
= strlen (arg
);
5070 /* get the stuff after the function name or address */
5071 extra_args
= strchr (arg
, ' ');
5075 extra_args_len
= strlen (extra_args
);
5082 beg_addr_string
= addr_string
;
5083 sals
= decode_line_1 (&addr_string
, 1, (struct symtab
*) NULL
, 0,
5086 xfree (beg_addr_string
);
5087 old_chain
= make_cleanup (xfree
, sals
.sals
);
5088 for (i
= 0; (i
< sals
.nelts
); i
++)
5091 if (find_pc_partial_function (sal
.pc
, (char **) NULL
, &low
, &high
))
5093 break_string
= (char *) xmalloc (extra_args_len
+ 26);
5095 sprintf (break_string
, "*0x%s %s", paddr_nz (high
), extra_args
);
5097 sprintf (break_string
, "*0x%s", paddr_nz (high
));
5098 break_command_1 (break_string
, flag
, from_tty
);
5099 xfree (break_string
);
5102 error ("No function contains the specified address");
5106 warning ("Multiple breakpoints were set.\n");
5107 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5109 do_cleanups (old_chain
);
5113 /* Helper function for break_command_1 and disassemble_command. */
5116 resolve_sal_pc (struct symtab_and_line
*sal
)
5120 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5122 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5123 error ("No line %d in file \"%s\".",
5124 sal
->line
, sal
->symtab
->filename
);
5128 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5130 struct blockvector
*bv
;
5135 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5138 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5139 sym
= block_function (b
);
5142 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5143 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5147 /* It really is worthwhile to have the section, so we'll just
5148 have to look harder. This case can be executed if we have
5149 line numbers but no functions (as can happen in assembly
5152 struct minimal_symbol
*msym
;
5154 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5156 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5163 break_command (char *arg
, int from_tty
)
5165 break_command_1 (arg
, 0, from_tty
);
5169 break_at_finish_command (char *arg
, int from_tty
)
5171 break_at_finish_command_1 (arg
, 0, from_tty
);
5175 break_at_finish_at_depth_command (char *arg
, int from_tty
)
5177 break_at_finish_at_depth_command_1 (arg
, 0, from_tty
);
5181 tbreak_command (char *arg
, int from_tty
)
5183 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5187 tbreak_at_finish_command (char *arg
, int from_tty
)
5189 break_at_finish_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5193 hbreak_command (char *arg
, int from_tty
)
5195 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5199 thbreak_command (char *arg
, int from_tty
)
5201 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5205 stop_command (char *arg
, int from_tty
)
5207 printf_filtered ("Specify the type of breakpoint to set.\n\
5208 Usage: stop in <function | address>\n\
5213 stopin_command (char *arg
, int from_tty
)
5217 if (arg
== (char *) NULL
)
5219 else if (*arg
!= '*')
5224 /* look for a ':'. If this is a line number specification, then
5225 say it is bad, otherwise, it should be an address or
5226 function/method name */
5227 while (*argptr
&& !hasColon
)
5229 hasColon
= (*argptr
== ':');
5234 badInput
= (*argptr
!= ':'); /* Not a class::method */
5236 badInput
= isdigit (*arg
); /* a simple line number */
5240 printf_filtered ("Usage: stop in <function | address>\n");
5242 break_command_1 (arg
, 0, from_tty
);
5246 stopat_command (char *arg
, int from_tty
)
5250 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5257 /* look for a ':'. If there is a '::' then get out, otherwise
5258 it is probably a line number. */
5259 while (*argptr
&& !hasColon
)
5261 hasColon
= (*argptr
== ':');
5266 badInput
= (*argptr
== ':'); /* we have class::method */
5268 badInput
= !isdigit (*arg
); /* not a line number */
5272 printf_filtered ("Usage: stop at <line>\n");
5274 break_command_1 (arg
, 0, from_tty
);
5278 /* accessflag: hw_write: watch write,
5279 hw_read: watch read,
5280 hw_access: watch access (read or write) */
5282 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5284 struct breakpoint
*b
;
5285 struct symtab_and_line sal
;
5286 struct expression
*exp
;
5287 struct block
*exp_valid_block
;
5288 struct value
*val
, *mark
;
5289 struct frame_info
*frame
;
5290 struct frame_info
*prev_frame
= NULL
;
5291 char *exp_start
= NULL
;
5292 char *exp_end
= NULL
;
5293 char *tok
, *end_tok
;
5295 char *cond_start
= NULL
;
5296 char *cond_end
= NULL
;
5297 struct expression
*cond
= NULL
;
5298 int i
, other_type_used
, target_resources_ok
= 0;
5299 enum bptype bp_type
;
5302 init_sal (&sal
); /* initialize to zeroes */
5304 /* Parse arguments. */
5305 innermost_block
= NULL
;
5307 exp
= parse_exp_1 (&arg
, 0, 0);
5309 exp_valid_block
= innermost_block
;
5310 mark
= value_mark ();
5311 val
= evaluate_expression (exp
);
5312 release_value (val
);
5313 if (VALUE_LAZY (val
))
5314 value_fetch_lazy (val
);
5317 while (*tok
== ' ' || *tok
== '\t')
5321 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5324 toklen
= end_tok
- tok
;
5325 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5327 tok
= cond_start
= end_tok
+ 1;
5328 cond
= parse_exp_1 (&tok
, 0, 0);
5332 error ("Junk at end of command.");
5334 if (accessflag
== hw_read
)
5335 bp_type
= bp_read_watchpoint
;
5336 else if (accessflag
== hw_access
)
5337 bp_type
= bp_access_watchpoint
;
5339 bp_type
= bp_hardware_watchpoint
;
5341 mem_cnt
= can_use_hardware_watchpoint (val
);
5342 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5343 error ("Expression cannot be implemented with read/access watchpoint.");
5346 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5347 target_resources_ok
=
5348 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5350 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5351 error ("Target does not support this type of hardware watchpoint.");
5353 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5354 error ("Target can only support one kind of HW watchpoint at a time.");
5357 #if defined(HPUXHPPA)
5358 /* On HP-UX if you set a h/w
5359 watchpoint before the "run" command, the inferior dies with a e.g.,
5360 SIGILL once you start it. I initially believed this was due to a
5361 bad interaction between page protection traps and the initial
5362 startup sequence by the dynamic linker.
5364 However, I tried avoiding that by having HP-UX's implementation of
5365 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5366 yet, which forced slow watches before a "run" or "attach", and it
5367 still fails somewhere in the startup code.
5369 Until I figure out what's happening, I'm disallowing watches altogether
5370 before the "run" or "attach" command. We'll tell the user they must
5371 set watches after getting the program started. */
5372 if (!target_has_execution
)
5374 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5377 #endif /* HPUXHPPA */
5379 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5380 watchpoint could not be set. */
5381 if (!mem_cnt
|| target_resources_ok
<= 0)
5382 bp_type
= bp_watchpoint
;
5384 /* Now set up the breakpoint. */
5385 b
= set_raw_breakpoint (sal
, bp_type
);
5386 set_breakpoint_count (breakpoint_count
+ 1);
5387 b
->number
= breakpoint_count
;
5388 b
->disposition
= disp_donttouch
;
5390 b
->exp_valid_block
= exp_valid_block
;
5391 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5395 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5399 frame
= block_innermost_frame (exp_valid_block
);
5402 prev_frame
= get_prev_frame (frame
);
5403 get_frame_id (frame
, &b
->watchpoint_frame
);
5407 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5410 /* If the expression is "local", then set up a "watchpoint scope"
5411 breakpoint at the point where we've left the scope of the watchpoint
5413 if (innermost_block
)
5417 struct breakpoint
*scope_breakpoint
;
5418 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5419 bp_watchpoint_scope
);
5421 scope_breakpoint
->enable_state
= bp_enabled
;
5423 /* Automatically delete the breakpoint when it hits. */
5424 scope_breakpoint
->disposition
= disp_del
;
5426 /* Only break in the proper frame (help with recursion). */
5427 scope_breakpoint
->frame
= prev_frame
->frame
;
5429 /* Set the address at which we will stop. */
5430 scope_breakpoint
->address
= get_frame_pc (prev_frame
);
5432 /* The scope breakpoint is related to the watchpoint. We
5433 will need to act on them together. */
5434 b
->related_breakpoint
= scope_breakpoint
;
5437 value_free_to_mark (mark
);
5441 /* Return count of locations need to be watched and can be handled
5442 in hardware. If the watchpoint can not be handled
5443 in hardware return zero. */
5445 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5446 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5447 ((BYTE_SIZE) <= (REGISTER_SIZE))
5450 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5451 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5452 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5456 can_use_hardware_watchpoint (struct value
*v
)
5458 int found_memory_cnt
= 0;
5459 struct value
*head
= v
;
5461 /* Did the user specifically forbid us to use hardware watchpoints? */
5462 if (!can_use_hw_watchpoints
)
5465 /* Make sure that the value of the expression depends only upon
5466 memory contents, and values computed from them within GDB. If we
5467 find any register references or function calls, we can't use a
5468 hardware watchpoint.
5470 The idea here is that evaluating an expression generates a series
5471 of values, one holding the value of every subexpression. (The
5472 expression a*b+c has five subexpressions: a, b, a*b, c, and
5473 a*b+c.) GDB's values hold almost enough information to establish
5474 the criteria given above --- they identify memory lvalues,
5475 register lvalues, computed values, etcetera. So we can evaluate
5476 the expression, and then scan the chain of values that leaves
5477 behind to decide whether we can detect any possible change to the
5478 expression's final value using only hardware watchpoints.
5480 However, I don't think that the values returned by inferior
5481 function calls are special in any way. So this function may not
5482 notice that an expression involving an inferior function call
5483 can't be watched with hardware watchpoints. FIXME. */
5484 for (; v
; v
= v
->next
)
5486 if (VALUE_LVAL (v
) == lval_memory
)
5489 /* A lazy memory lvalue is one that GDB never needed to fetch;
5490 we either just used its address (e.g., `a' in `a.b') or
5491 we never needed it at all (e.g., `a' in `a,b'). */
5495 /* Ahh, memory we actually used! Check if we can cover
5496 it with hardware watchpoints. */
5497 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
5499 /* We only watch structs and arrays if user asked for it
5500 explicitly, never if they just happen to appear in a
5501 middle of some value chain. */
5503 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5504 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5506 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
5507 int len
= TYPE_LENGTH (VALUE_TYPE (v
));
5509 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5516 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
5517 return 0; /* ??? What does this represent? */
5518 else if (v
->lval
== lval_register
)
5519 return 0; /* cannot watch a register with a HW watchpoint */
5522 /* The expression itself looks suitable for using a hardware
5523 watchpoint, but give the target machine a chance to reject it. */
5524 return found_memory_cnt
;
5528 watch_command_wrapper (char *arg
, int from_tty
)
5530 watch_command (arg
, from_tty
);
5534 watch_command (char *arg
, int from_tty
)
5536 watch_command_1 (arg
, hw_write
, from_tty
);
5540 rwatch_command_wrapper (char *arg
, int from_tty
)
5542 rwatch_command (arg
, from_tty
);
5546 rwatch_command (char *arg
, int from_tty
)
5548 watch_command_1 (arg
, hw_read
, from_tty
);
5552 awatch_command_wrapper (char *arg
, int from_tty
)
5554 awatch_command (arg
, from_tty
);
5558 awatch_command (char *arg
, int from_tty
)
5560 watch_command_1 (arg
, hw_access
, from_tty
);
5564 /* Helper routines for the until_command routine in infcmd.c. Here
5565 because it uses the mechanisms of breakpoints. */
5567 /* This function is called by fetch_inferior_event via the
5568 cmd_continuation pointer, to complete the until command. It takes
5569 care of cleaning up the temporary breakpoints set up by the until
5572 until_break_command_continuation (struct continuation_arg
*arg
)
5574 struct cleanup
*cleanups
;
5576 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5577 do_exec_cleanups (cleanups
);
5582 until_break_command (char *arg
, int from_tty
)
5584 struct symtabs_and_lines sals
;
5585 struct symtab_and_line sal
;
5586 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
5587 struct breakpoint
*breakpoint
;
5588 struct cleanup
*old_chain
;
5589 struct continuation_arg
*arg1
;
5592 clear_proceed_status ();
5594 /* Set a breakpoint where the user wants it and at return from
5597 if (default_breakpoint_valid
)
5598 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5599 default_breakpoint_line
, (char ***) NULL
);
5601 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5602 0, (char ***) NULL
);
5604 if (sals
.nelts
!= 1)
5605 error ("Couldn't get information on specified line.");
5608 xfree (sals
.sals
); /* malloc'd, so freed */
5611 error ("Junk at end of arguments.");
5613 resolve_sal_pc (&sal
);
5615 breakpoint
= set_momentary_breakpoint (sal
, deprecated_selected_frame
, bp_until
);
5617 if (!event_loop_p
|| !target_can_async_p ())
5618 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5620 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5622 /* If we are running asynchronously, and the target supports async
5623 execution, we are not waiting for the target to stop, in the call
5624 tp proceed, below. This means that we cannot delete the
5625 brekpoints until the target has actually stopped. The only place
5626 where we get a chance to do that is in fetch_inferior_event, so
5627 we must set things up for that. */
5629 if (event_loop_p
&& target_can_async_p ())
5631 /* In this case the arg for the continuation is just the point
5632 in the exec_cleanups chain from where to start doing
5633 cleanups, because all the continuation does is the cleanups in
5634 the exec_cleanup_chain. */
5636 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5638 arg1
->data
.pointer
= old_chain
;
5640 add_continuation (until_break_command_continuation
, arg1
);
5643 /* Keep within the current frame */
5647 sal
= find_pc_line (prev_frame
->pc
, 0);
5648 sal
.pc
= prev_frame
->pc
;
5649 breakpoint
= set_momentary_breakpoint (sal
, prev_frame
, bp_until
);
5650 if (!event_loop_p
|| !target_can_async_p ())
5651 make_cleanup_delete_breakpoint (breakpoint
);
5653 make_exec_cleanup_delete_breakpoint (breakpoint
);
5656 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
5657 /* Do the cleanups now, anly if we are not running asynchronously,
5658 of if we are, but the target is still synchronous. */
5659 if (!event_loop_p
|| !target_can_async_p ())
5660 do_cleanups (old_chain
);
5664 /* These aren't used; I don't konw what they were for. */
5665 /* Set a breakpoint at the catch clause for NAME. */
5667 catch_breakpoint (char *name
)
5672 disable_catch_breakpoint (void)
5677 delete_catch_breakpoint (void)
5682 enable_catch_breakpoint (void)
5689 struct sal_chain
*next
;
5690 struct symtab_and_line sal
;
5694 /* Not really used -- invocation in handle_gnu_4_16_catch_command
5695 had been commented out in the v.4.16 sources, and stays
5696 disabled there now because "catch NAME" syntax isn't allowed.
5698 /* This isn't used; I don't know what it was for. */
5699 /* For each catch clause identified in ARGS, run FUNCTION
5700 with that clause as an argument. */
5701 static struct symtabs_and_lines
5702 map_catch_names (char *args
, int (*function
) ())
5704 register char *p
= args
;
5706 struct symtabs_and_lines sals
;
5708 struct sal_chain
*sal_chain
= 0;
5712 error_no_arg ("one or more catch names");
5720 /* Don't swallow conditional part. */
5721 if (p1
[0] == 'i' && p1
[1] == 'f'
5722 && (p1
[2] == ' ' || p1
[2] == '\t'))
5728 while (isalnum (*p1
) || *p1
== '_' || *p1
== '$')
5732 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
5733 error ("Arguments must be catch names.");
5739 struct sal_chain
*next
= (struct sal_chain
*)
5740 alloca (sizeof (struct sal_chain
));
5741 next
->next
= sal_chain
;
5742 next
->sal
= get_catch_sal (p
);
5747 printf_unfiltered ("No catch clause for exception %s.\n", p
);
5752 while (*p
== ' ' || *p
== '\t')
5758 /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
5760 static struct symtabs_and_lines
5761 get_catch_sals (int this_level_only
)
5763 register struct blockvector
*bl
;
5764 register struct block
*block
;
5765 int index
, have_default
= 0;
5767 struct symtabs_and_lines sals
;
5768 struct sal_chain
*sal_chain
= 0;
5769 char *blocks_searched
;
5771 /* Not sure whether an error message is always the correct response,
5772 but it's better than a core dump. */
5773 if (deprecated_selected_frame
== NULL
)
5774 error ("No selected frame.");
5775 block
= get_frame_block (deprecated_selected_frame
, 0);
5776 pc
= deprecated_selected_frame
->pc
;
5782 error ("No symbol table info available.\n");
5784 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
5785 blocks_searched
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
5786 memset (blocks_searched
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
5790 CORE_ADDR end
= BLOCK_END (block
) - 4;
5793 if (bl
!= blockvector_for_pc (end
, &index
))
5794 error ("blockvector blotch");
5795 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
5796 error ("blockvector botch");
5797 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
5800 /* Don't print out blocks that have gone by. */
5801 while (index
< last_index
5802 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
5805 while (index
< last_index
5806 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
5808 if (blocks_searched
[index
] == 0)
5810 struct block
*b
= BLOCKVECTOR_BLOCK (bl
, index
);
5812 register struct symbol
*sym
;
5814 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
5816 if (STREQ (SYMBOL_NAME (sym
), "default"))
5822 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
5824 struct sal_chain
*next
= (struct sal_chain
*)
5825 alloca (sizeof (struct sal_chain
));
5826 next
->next
= sal_chain
;
5827 next
->sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
),
5832 blocks_searched
[index
] = 1;
5838 if (sal_chain
&& this_level_only
)
5841 /* After handling the function's top-level block, stop.
5842 Don't continue to its superblock, the block of
5843 per-file symbols. */
5844 if (BLOCK_FUNCTION (block
))
5846 block
= BLOCK_SUPERBLOCK (block
);
5851 struct sal_chain
*tmp_chain
;
5853 /* Count the number of entries. */
5854 for (index
= 0, tmp_chain
= sal_chain
; tmp_chain
;
5855 tmp_chain
= tmp_chain
->next
)
5859 sals
.sals
= (struct symtab_and_line
*)
5860 xmalloc (index
* sizeof (struct symtab_and_line
));
5861 for (index
= 0; sal_chain
; sal_chain
= sal_chain
->next
, index
++)
5862 sals
.sals
[index
] = sal_chain
->sal
;
5869 ep_skip_leading_whitespace (char **s
)
5871 if ((s
== NULL
) || (*s
== NULL
))
5873 while (isspace (**s
))
5877 /* This function examines a string, and attempts to find a token
5878 that might be an event name in the leading characters. If a
5879 possible match is found, a pointer to the last character of
5880 the token is returned. Else, NULL is returned. */
5883 ep_find_event_name_end (char *arg
)
5886 char *event_name_end
= NULL
;
5888 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5892 /* We break out of the loop when we find a token delimiter.
5893 Basically, we're looking for alphanumerics and underscores;
5894 anything else delimites the token. */
5897 if (!isalnum (*s
) && (*s
!= '_'))
5903 return event_name_end
;
5907 /* This function attempts to parse an optional "if <cond>" clause
5908 from the arg string. If one is not found, it returns NULL.
5910 Else, it returns a pointer to the condition string. (It does not
5911 attempt to evaluate the string against a particular block.) And,
5912 it updates arg to point to the first character following the parsed
5913 if clause in the arg string. */
5916 ep_parse_optional_if_clause (char **arg
)
5920 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
5923 /* Skip the "if" keyword. */
5926 /* Skip any extra leading whitespace, and record the start of the
5927 condition string. */
5928 ep_skip_leading_whitespace (arg
);
5931 /* Assume that the condition occupies the remainder of the arg string. */
5932 (*arg
) += strlen (cond_string
);
5937 /* This function attempts to parse an optional filename from the arg
5938 string. If one is not found, it returns NULL.
5940 Else, it returns a pointer to the parsed filename. (This function
5941 makes no attempt to verify that a file of that name exists, or is
5942 accessible.) And, it updates arg to point to the first character
5943 following the parsed filename in the arg string.
5945 Note that clients needing to preserve the returned filename for
5946 future access should copy it to their own buffers. */
5948 ep_parse_optional_filename (char **arg
)
5950 static char filename
[1024];
5955 if ((*arg_p
== '\0') || isspace (*arg_p
))
5973 /* Commands to deal with catching events, such as signals, exceptions,
5974 process start/exit, etc. */
5978 catch_fork
, catch_vfork
5982 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
5983 static void catch_fork_command_1 (catch_fork_kind fork_kind
,
5984 char *arg
, int tempflag
, int from_tty
);
5987 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
5990 char *cond_string
= NULL
;
5992 ep_skip_leading_whitespace (&arg
);
5994 /* The allowed syntax is:
5996 catch [v]fork if <cond>
5998 First, check if there's an if clause. */
5999 cond_string
= ep_parse_optional_if_clause (&arg
);
6001 if ((*arg
!= '\0') && !isspace (*arg
))
6002 error ("Junk at end of arguments.");
6004 /* If this target supports it, create a fork or vfork catchpoint
6005 and enable reporting of such events. */
6009 create_fork_event_catchpoint (tempflag
, cond_string
);
6012 create_vfork_event_catchpoint (tempflag
, cond_string
);
6015 error ("unsupported or unknown fork kind; cannot catch it");
6021 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6023 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6025 char *cond_string
= NULL
;
6027 ep_skip_leading_whitespace (&arg
);
6029 /* The allowed syntax is:
6031 catch exec if <cond>
6033 First, check if there's an if clause. */
6034 cond_string
= ep_parse_optional_if_clause (&arg
);
6036 if ((*arg
!= '\0') && !isspace (*arg
))
6037 error ("Junk at end of arguments.");
6039 /* If this target supports it, create an exec catchpoint
6040 and enable reporting of such events. */
6041 create_exec_event_catchpoint (tempflag
, cond_string
);
6045 #if defined(SOLIB_ADD)
6047 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6049 char *dll_pathname
= NULL
;
6050 char *cond_string
= NULL
;
6052 ep_skip_leading_whitespace (&arg
);
6054 /* The allowed syntax is:
6056 catch load if <cond>
6057 catch load <filename>
6058 catch load <filename> if <cond>
6060 The user is not allowed to specify the <filename> after an
6063 We'll ignore the pathological case of a file named "if".
6065 First, check if there's an if clause. If so, then there
6066 cannot be a filename. */
6067 cond_string
= ep_parse_optional_if_clause (&arg
);
6069 /* If there was an if clause, then there cannot be a filename.
6070 Else, there might be a filename and an if clause. */
6071 if (cond_string
== NULL
)
6073 dll_pathname
= ep_parse_optional_filename (&arg
);
6074 ep_skip_leading_whitespace (&arg
);
6075 cond_string
= ep_parse_optional_if_clause (&arg
);
6078 if ((*arg
!= '\0') && !isspace (*arg
))
6079 error ("Junk at end of arguments.");
6081 /* Create a load breakpoint that only triggers when a load of
6082 the specified dll (or any dll, if no pathname was specified)
6084 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6085 dll_pathname
, cond_string
);
6089 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6091 char *dll_pathname
= NULL
;
6092 char *cond_string
= NULL
;
6094 ep_skip_leading_whitespace (&arg
);
6096 /* The allowed syntax is:
6098 catch unload if <cond>
6099 catch unload <filename>
6100 catch unload <filename> if <cond>
6102 The user is not allowed to specify the <filename> after an
6105 We'll ignore the pathological case of a file named "if".
6107 First, check if there's an if clause. If so, then there
6108 cannot be a filename. */
6109 cond_string
= ep_parse_optional_if_clause (&arg
);
6111 /* If there was an if clause, then there cannot be a filename.
6112 Else, there might be a filename and an if clause. */
6113 if (cond_string
== NULL
)
6115 dll_pathname
= ep_parse_optional_filename (&arg
);
6116 ep_skip_leading_whitespace (&arg
);
6117 cond_string
= ep_parse_optional_if_clause (&arg
);
6120 if ((*arg
!= '\0') && !isspace (*arg
))
6121 error ("Junk at end of arguments.");
6123 /* Create an unload breakpoint that only triggers when an unload of
6124 the specified dll (or any dll, if no pathname was specified)
6126 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6127 dll_pathname
, cond_string
);
6129 #endif /* SOLIB_ADD */
6131 /* Commands to deal with catching exceptions. */
6133 /* Set a breakpoint at the specified callback routine for an
6134 exception event callback */
6137 create_exception_catchpoint (int tempflag
, char *cond_string
,
6138 enum exception_event_kind ex_event
,
6139 struct symtab_and_line
*sal
)
6141 struct breakpoint
*b
;
6142 int thread
= -1; /* All threads. */
6145 if (!sal
) /* no exception support? */
6150 case EX_EVENT_THROW
:
6151 bptype
= bp_catch_throw
;
6153 case EX_EVENT_CATCH
:
6154 bptype
= bp_catch_catch
;
6156 default: /* error condition */
6157 error ("Internal error -- invalid catchpoint kind");
6160 b
= set_raw_breakpoint (*sal
, bptype
);
6161 set_breakpoint_count (breakpoint_count
+ 1);
6162 b
->number
= breakpoint_count
;
6164 b
->cond_string
= (cond_string
== NULL
) ?
6165 NULL
: savestring (cond_string
, strlen (cond_string
));
6167 b
->addr_string
= NULL
;
6168 b
->enable_state
= bp_enabled
;
6169 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6173 /* Deal with "catch catch" and "catch throw" commands */
6176 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6177 int tempflag
, int from_tty
)
6179 char *cond_string
= NULL
;
6180 struct symtab_and_line
*sal
= NULL
;
6182 ep_skip_leading_whitespace (&arg
);
6184 cond_string
= ep_parse_optional_if_clause (&arg
);
6186 if ((*arg
!= '\0') && !isspace (*arg
))
6187 error ("Junk at end of arguments.");
6189 if ((ex_event
!= EX_EVENT_THROW
) &&
6190 (ex_event
!= EX_EVENT_CATCH
))
6191 error ("Unsupported or unknown exception event; cannot catch it");
6193 /* See if we can find a callback routine */
6194 sal
= target_enable_exception_callback (ex_event
, 1);
6198 /* We have callbacks from the runtime system for exceptions.
6199 Set a breakpoint on the sal found, if no errors */
6200 if (sal
!= (struct symtab_and_line
*) -1)
6201 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6203 return; /* something went wrong with setting up callbacks */
6207 /* No callbacks from runtime system for exceptions.
6208 Try GNU C++ exception breakpoints using labels in debug info. */
6209 if (ex_event
== EX_EVENT_CATCH
)
6211 handle_gnu_4_16_catch_command (arg
, tempflag
, from_tty
);
6213 else if (ex_event
== EX_EVENT_THROW
)
6215 /* Set a breakpoint on __raise_exception () */
6217 warning ("Unsupported with this platform/compiler combination.");
6218 warning ("Perhaps you can achieve the effect you want by setting");
6219 warning ("a breakpoint on __raise_exception().");
6224 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6225 inside a catch_errors */
6228 cover_target_enable_exception_callback (PTR arg
)
6230 args_for_catchpoint_enable
*args
= arg
;
6231 struct symtab_and_line
*sal
;
6232 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6235 else if (sal
== (struct symtab_and_line
*) -1)
6238 return 1; /*is valid */
6243 /* This is the original v.4.16 and earlier version of the
6244 catch_command_1() function. Now that other flavours of "catch"
6245 have been introduced, and since exception handling can be handled
6246 in other ways (through target ops) also, this is used only for the
6247 GNU C++ exception handling system.
6248 Note: Only the "catch" flavour of GDB 4.16 is handled here. The
6249 "catch NAME" is now no longer allowed in catch_command_1(). Also,
6250 there was no code in GDB 4.16 for "catch throw".
6252 Called from catch_exception_command_1 () */
6256 handle_gnu_4_16_catch_command (char *arg
, int tempflag
, int from_tty
)
6258 /* First, translate ARG into something we can deal with in terms
6261 struct symtabs_and_lines sals
;
6262 struct symtab_and_line sal
;
6263 register struct expression
*cond
= 0;
6264 register struct breakpoint
*b
;
6268 init_sal (&sal
); /* initialize to zeroes */
6270 /* If no arg given, or if first arg is 'if ', all active catch clauses
6271 are breakpointed. */
6273 if (!arg
|| (arg
[0] == 'i' && arg
[1] == 'f'
6274 && (arg
[2] == ' ' || arg
[2] == '\t')))
6276 /* Grab all active catch clauses. */
6277 sals
= get_catch_sals (0);
6281 /* Grab selected catch clauses. */
6282 error ("catch NAME not implemented");
6285 /* Not sure why this code has been disabled. I'm leaving
6286 it disabled. We can never come here now anyway
6287 since we don't allow the "catch NAME" syntax.
6290 /* This isn't used; I don't know what it was for. */
6291 sals
= map_catch_names (arg
, catch_breakpoint
);
6299 for (i
= 0; i
< sals
.nelts
; i
++)
6301 resolve_sal_pc (&sals
.sals
[i
]);
6305 if (arg
[0] == 'i' && arg
[1] == 'f'
6306 && (arg
[2] == ' ' || arg
[2] == '\t'))
6307 cond
= parse_exp_1 ((arg
+= 2, &arg
),
6308 block_for_pc (sals
.sals
[i
].pc
), 0);
6310 error ("Junk at end of arguments.");
6315 for (i
= 0; i
< sals
.nelts
; i
++)
6320 describe_other_breakpoints (sal
.pc
, sal
.section
);
6322 /* Important -- this is an ordinary breakpoint. For platforms
6323 with callback support for exceptions,
6324 create_exception_catchpoint() will create special bp types
6325 (bp_catch_catch and bp_catch_throw), and there is code in
6326 insert_breakpoints() and elsewhere that depends on that. */
6327 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6328 set_breakpoint_count (breakpoint_count
+ 1);
6329 b
->number
= breakpoint_count
;
6332 b
->enable_state
= bp_enabled
;
6333 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6340 warning ("Multiple breakpoints were set.");
6341 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
6347 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6350 /* The first argument may be an event name, such as "start" or "load".
6351 If so, then handle it as such. If it doesn't match an event name,
6352 then attempt to interpret it as an exception name. (This latter is
6353 the v4.16-and-earlier GDB meaning of the "catch" command.)
6355 First, try to find the bounds of what might be an event name. */
6356 char *arg1_start
= arg
;
6360 if (arg1_start
== NULL
)
6362 /* Old behaviour was to use pre-v-4.16 syntax */
6363 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6365 /* Now, this is not allowed */
6366 error ("Catch requires an event name.");
6369 arg1_end
= ep_find_event_name_end (arg1_start
);
6370 if (arg1_end
== NULL
)
6371 error ("catch requires an event");
6372 arg1_length
= arg1_end
+ 1 - arg1_start
;
6374 /* Try to match what we found against known event names. */
6375 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6377 error ("Catch of signal not yet implemented");
6379 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6381 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6382 tempflag
, from_tty
);
6384 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6386 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6387 tempflag
, from_tty
);
6389 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6391 error ("Catch of thread_start not yet implemented");
6393 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6395 error ("Catch of thread_exit not yet implemented");
6397 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6399 error ("Catch of thread_join not yet implemented");
6401 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6403 error ("Catch of start not yet implemented");
6405 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6407 error ("Catch of exit not yet implemented");
6409 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6411 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6412 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6414 error ("Catch of fork not yet implemented");
6417 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6419 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6420 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6422 error ("Catch of vfork not yet implemented");
6425 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6427 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6428 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6430 error ("Catch of exec not yet implemented");
6433 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6435 #if defined(SOLIB_ADD)
6436 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6438 error ("Catch of load not implemented");
6441 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6443 #if defined(SOLIB_ADD)
6444 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6446 error ("Catch of load not implemented");
6449 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6451 error ("Catch of stop not yet implemented");
6454 /* This doesn't appear to be an event name */
6458 /* Pre-v.4.16 behaviour was to treat the argument
6459 as the name of an exception */
6460 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6461 /* Now this is not allowed */
6462 error ("Unknown event kind specified for catch");
6467 /* Used by the gui, could be made a worker for other things. */
6470 set_breakpoint_sal (struct symtab_and_line sal
)
6472 struct breakpoint
*b
;
6473 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6474 set_breakpoint_count (breakpoint_count
+ 1);
6475 b
->number
= breakpoint_count
;
6482 /* These aren't used; I don't know what they were for. */
6483 /* Disable breakpoints on all catch clauses described in ARGS. */
6485 disable_catch (char *args
)
6487 /* Map the disable command to catch clauses described in ARGS. */
6490 /* Enable breakpoints on all catch clauses described in ARGS. */
6492 enable_catch (char *args
)
6494 /* Map the disable command to catch clauses described in ARGS. */
6497 /* Delete breakpoints on all catch clauses in the active scope. */
6499 delete_catch (char *args
)
6501 /* Map the delete command to catch clauses described in ARGS. */
6506 catch_command (char *arg
, int from_tty
)
6508 catch_command_1 (arg
, 0, from_tty
);
6513 tcatch_command (char *arg
, int from_tty
)
6515 catch_command_1 (arg
, 1, from_tty
);
6518 /* Delete breakpoints by address or line. */
6521 clear_command (char *arg
, int from_tty
)
6523 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6525 struct symtabs_and_lines sals
;
6526 struct symtab_and_line sal
;
6531 sals
= decode_line_spec (arg
, 1);
6536 sals
.sals
= (struct symtab_and_line
*)
6537 xmalloc (sizeof (struct symtab_and_line
));
6538 make_cleanup (xfree
, sals
.sals
);
6539 init_sal (&sal
); /* initialize to zeroes */
6540 sal
.line
= default_breakpoint_line
;
6541 sal
.symtab
= default_breakpoint_symtab
;
6542 sal
.pc
= default_breakpoint_address
;
6543 if (sal
.symtab
== 0)
6544 error ("No source file specified.");
6552 /* For each line spec given, delete bps which correspond
6553 to it. Do it in two passes, solely to preserve the current
6554 behavior that from_tty is forced true if we delete more than
6558 for (i
= 0; i
< sals
.nelts
; i
++)
6560 /* If exact pc given, clear bpts at that pc.
6561 If line given (pc == 0), clear all bpts on specified line.
6562 If defaulting, clear all bpts on default line
6565 defaulting sal.pc != 0 tests to do
6570 1 0 <can't happen> */
6575 /* Find all matching breakpoints, remove them from the
6576 breakpoint chain, and add them to the 'found' chain. */
6577 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6579 /* Are we going to delete b? */
6580 if (b
->type
!= bp_none
6581 && b
->type
!= bp_watchpoint
6582 && b
->type
!= bp_hardware_watchpoint
6583 && b
->type
!= bp_read_watchpoint
6584 && b
->type
!= bp_access_watchpoint
6585 /* Not if b is a watchpoint of any sort... */
6586 && (((sal
.pc
&& (b
->address
== sal
.pc
))
6587 && (!section_is_overlay (b
->section
)
6588 || b
->section
== sal
.section
))
6589 /* Yes, if sal.pc matches b (modulo overlays). */
6590 || ((default_match
|| (0 == sal
.pc
))
6591 && b
->source_file
!= NULL
6592 && sal
.symtab
!= NULL
6593 && STREQ (b
->source_file
, sal
.symtab
->filename
)
6594 && b
->line_number
== sal
.line
)))
6595 /* Yes, if sal source file and line matches b. */
6597 /* Remove it from breakpoint_chain... */
6598 if (b
== breakpoint_chain
)
6600 /* b is at the head of the list */
6601 breakpoint_chain
= b
->next
;
6605 prev
->next
= b
->next
;
6607 /* And add it to 'found' chain. */
6613 /* Keep b, and keep a pointer to it. */
6618 /* Now go thru the 'found' chain and delete them. */
6622 error ("No breakpoint at %s.", arg
);
6624 error ("No breakpoint at this line.");
6628 from_tty
= 1; /* Always report if deleted more than one */
6630 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6631 breakpoints_changed ();
6635 printf_unfiltered ("%d ", found
->number
);
6637 delete_breakpoint (found
);
6641 putchar_unfiltered ('\n');
6644 /* Delete breakpoint in BS if they are `delete' breakpoints and
6645 all breakpoints that are marked for deletion, whether hit or not.
6646 This is called after any breakpoint is hit, or after errors. */
6649 breakpoint_auto_delete (bpstat bs
)
6651 struct breakpoint
*b
, *temp
;
6653 for (; bs
; bs
= bs
->next
)
6654 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6656 delete_breakpoint (bs
->breakpoint_at
);
6658 ALL_BREAKPOINTS_SAFE (b
, temp
)
6660 if (b
->disposition
== disp_del_at_next_stop
)
6661 delete_breakpoint (b
);
6665 /* Delete a breakpoint and clean up all traces of it in the data
6669 delete_breakpoint (struct breakpoint
*bpt
)
6671 register struct breakpoint
*b
;
6675 error ("Internal error (attempted to delete a NULL breakpoint)");
6678 /* Has this bp already been deleted? This can happen because multiple
6679 lists can hold pointers to bp's. bpstat lists are especial culprits.
6681 One example of this happening is a watchpoint's scope bp. When the
6682 scope bp triggers, we notice that the watchpoint is out of scope, and
6683 delete it. We also delete its scope bp. But the scope bp is marked
6684 "auto-deleting", and is already on a bpstat. That bpstat is then
6685 checked for auto-deleting bp's, which are deleted.
6687 A real solution to this problem might involve reference counts in bp's,
6688 and/or giving them pointers back to their referencing bpstat's, and
6689 teaching delete_breakpoint to only free a bp's storage when no more
6690 references were extent. A cheaper bandaid was chosen. */
6691 if (bpt
->type
== bp_none
)
6694 if (delete_breakpoint_hook
)
6695 delete_breakpoint_hook (bpt
);
6696 breakpoint_delete_event (bpt
->number
);
6699 remove_breakpoint (bpt
, mark_inserted
);
6701 if (breakpoint_chain
== bpt
)
6702 breakpoint_chain
= bpt
->next
;
6704 /* If we have callback-style exception catchpoints, don't go through
6705 the adjustments to the C++ runtime library etc. if the inferior
6706 isn't actually running. target_enable_exception_callback for a
6707 null target ops vector gives an undesirable error message, so we
6708 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6709 exceptions are supported in this way, it's OK for now. FIXME */
6710 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6712 static char message1
[] = "Error in deleting catchpoint %d:\n";
6713 static char message
[sizeof (message1
) + 30];
6714 args_for_catchpoint_enable args
;
6716 /* Format possible error msg */
6717 sprintf (message
, message1
, bpt
->number
);
6718 args
.kind
= bpt
->type
== bp_catch_catch
?
6719 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6721 catch_errors (cover_target_enable_exception_callback
, &args
,
6722 message
, RETURN_MASK_ALL
);
6729 b
->next
= bpt
->next
;
6733 check_duplicates (bpt
);
6734 /* If this breakpoint was inserted, and there is another breakpoint
6735 at the same address, we need to insert the other breakpoint. */
6737 && bpt
->type
!= bp_hardware_watchpoint
6738 && bpt
->type
!= bp_read_watchpoint
6739 && bpt
->type
!= bp_access_watchpoint
6740 && bpt
->type
!= bp_catch_fork
6741 && bpt
->type
!= bp_catch_vfork
6742 && bpt
->type
!= bp_catch_exec
)
6745 if (b
->address
== bpt
->address
6746 && b
->section
== bpt
->section
6748 && b
->enable_state
!= bp_disabled
6749 && b
->enable_state
!= bp_shlib_disabled
6750 && b
->enable_state
!= bp_call_disabled
)
6754 /* We should never reach this point if there is a permanent
6755 breakpoint at the same address as the one being deleted.
6756 If there is a permanent breakpoint somewhere, it should
6757 always be the only one inserted. */
6758 if (b
->enable_state
== bp_permanent
)
6759 internal_error (__FILE__
, __LINE__
,
6760 "another breakpoint was inserted on top of "
6761 "a permanent breakpoint");
6763 if (b
->type
== bp_hardware_breakpoint
)
6764 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
6766 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
6768 /* If there was an error in the insert, print a message, then stop execution. */
6771 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6772 make_cleanup_ui_file_delete (tmp_error_stream
);
6775 if (b
->type
== bp_hardware_breakpoint
)
6777 fprintf_unfiltered (tmp_error_stream
,
6778 "Cannot insert hardware breakpoint %d.\n"
6779 "You may have requested too many hardware breakpoints.\n",
6784 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6785 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6786 print_address_numeric (b
->address
, 1, tmp_error_stream
);
6787 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6788 safe_strerror (val
));
6791 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6792 target_terminal_ours_for_output ();
6793 error_stream(tmp_error_stream
);
6800 free_command_lines (&bpt
->commands
);
6803 if (bpt
->cond_string
!= NULL
)
6804 xfree (bpt
->cond_string
);
6805 if (bpt
->addr_string
!= NULL
)
6806 xfree (bpt
->addr_string
);
6807 if (bpt
->exp
!= NULL
)
6809 if (bpt
->exp_string
!= NULL
)
6810 xfree (bpt
->exp_string
);
6811 if (bpt
->val
!= NULL
)
6812 value_free (bpt
->val
);
6813 if (bpt
->source_file
!= NULL
)
6814 xfree (bpt
->source_file
);
6815 if (bpt
->dll_pathname
!= NULL
)
6816 xfree (bpt
->dll_pathname
);
6817 if (bpt
->triggered_dll_pathname
!= NULL
)
6818 xfree (bpt
->triggered_dll_pathname
);
6819 if (bpt
->exec_pathname
!= NULL
)
6820 xfree (bpt
->exec_pathname
);
6822 /* Be sure no bpstat's are pointing at it after it's been freed. */
6823 /* FIXME, how can we find all bpstat's?
6824 We just check stop_bpstat for now. */
6825 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6826 if (bs
->breakpoint_at
== bpt
)
6828 bs
->breakpoint_at
= NULL
;
6830 /* bs->commands will be freed later. */
6832 /* On the chance that someone will soon try again to delete this same
6833 bp, we mark it as deleted before freeing its storage. */
6834 bpt
->type
= bp_none
;
6840 do_delete_breakpoint_cleanup (void *b
)
6842 delete_breakpoint (b
);
6846 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6848 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6852 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6854 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6858 delete_command (char *arg
, int from_tty
)
6860 struct breakpoint
*b
, *temp
;
6866 int breaks_to_delete
= 0;
6868 /* Delete all breakpoints if no argument.
6869 Do not delete internal or call-dummy breakpoints, these
6870 have to be deleted with an explicit breakpoint number argument. */
6873 if (b
->type
!= bp_call_dummy
&&
6874 b
->type
!= bp_shlib_event
&&
6875 b
->type
!= bp_thread_event
&&
6876 b
->type
!= bp_overlay_event
&&
6878 breaks_to_delete
= 1;
6881 /* Ask user only if there are some breakpoints to delete. */
6883 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
6885 ALL_BREAKPOINTS_SAFE (b
, temp
)
6887 if (b
->type
!= bp_call_dummy
&&
6888 b
->type
!= bp_shlib_event
&&
6889 b
->type
!= bp_thread_event
&&
6890 b
->type
!= bp_overlay_event
&&
6892 delete_breakpoint (b
);
6897 map_breakpoint_numbers (arg
, delete_breakpoint
);
6900 /* Reset a breakpoint given it's struct breakpoint * BINT.
6901 The value we return ends up being the return value from catch_errors.
6902 Unused in this case. */
6905 breakpoint_re_set_one (PTR bint
)
6907 /* get past catch_errs */
6908 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6911 struct symtabs_and_lines sals
;
6913 enum enable_state save_enable
;
6918 warning ("attempted to reset apparently deleted breakpoint #%d?",
6922 case bp_hardware_breakpoint
:
6924 case bp_catch_unload
:
6925 if (b
->addr_string
== NULL
)
6927 /* Anything without a string can't be re-set. */
6928 delete_breakpoint (b
);
6931 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6933 ``And a hack it is, although Apple's Darwin version of GDB
6934 contains an almost identical hack to implement a "future
6935 break" command. It seems to work in many real world cases,
6936 but it is easy to come up with a test case where the patch
6937 doesn't help at all.''
6939 ``It seems that the way GDB implements breakpoints - in -
6940 shared - libraries was designed for a.out shared library
6941 systems (SunOS 4) where shared libraries were loaded at a
6942 fixed address in memory. Since ELF shared libraries can (and
6943 will) be loaded at any address in memory, things break.
6944 Fixing this is not trivial. Therefore, I'm not sure whether
6945 we should add this hack to the branch only. I cannot
6946 guarantee that things will be fixed on the trunk in the near
6949 In case we have a problem, disable this breakpoint. We'll
6950 restore its status if we succeed. Don't disable a
6951 shlib_disabled breakpoint though. There's a fair chance we
6952 can't re-set it if the shared library it's in hasn't been
6954 save_enable
= b
->enable_state
;
6955 if (b
->enable_state
!= bp_shlib_disabled
)
6956 b
->enable_state
= bp_disabled
;
6958 set_language (b
->language
);
6959 input_radix
= b
->input_radix
;
6961 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
);
6962 for (i
= 0; i
< sals
.nelts
; i
++)
6964 resolve_sal_pc (&sals
.sals
[i
]);
6966 /* Reparse conditions, they might contain references to the
6968 if (b
->cond_string
!= NULL
)
6973 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
6976 /* We need to re-set the breakpoint if the address changes... */
6977 if (b
->address
!= sals
.sals
[i
].pc
6978 /* ...or new and old breakpoints both have source files, and
6979 the source file name or the line number changes... */
6980 || (b
->source_file
!= NULL
6981 && sals
.sals
[i
].symtab
!= NULL
6982 && (!STREQ (b
->source_file
, sals
.sals
[i
].symtab
->filename
)
6983 || b
->line_number
!= sals
.sals
[i
].line
)
6985 /* ...or we switch between having a source file and not having
6987 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
6990 if (b
->source_file
!= NULL
)
6991 xfree (b
->source_file
);
6992 if (sals
.sals
[i
].symtab
== NULL
)
6993 b
->source_file
= NULL
;
6996 savestring (sals
.sals
[i
].symtab
->filename
,
6997 strlen (sals
.sals
[i
].symtab
->filename
));
6998 b
->line_number
= sals
.sals
[i
].line
;
6999 b
->address
= sals
.sals
[i
].pc
;
7001 /* Used to check for duplicates here, but that can
7002 cause trouble, as it doesn't check for disabled
7007 /* Might be better to do this just once per breakpoint_re_set,
7008 rather than once for every breakpoint. */
7009 breakpoints_changed ();
7011 b
->section
= sals
.sals
[i
].section
;
7012 b
->enable_state
= save_enable
; /* Restore it, this worked. */
7015 /* Now that this is re-enabled, check_duplicates
7017 check_duplicates (b
);
7024 case bp_hardware_watchpoint
:
7025 case bp_read_watchpoint
:
7026 case bp_access_watchpoint
:
7027 innermost_block
= NULL
;
7028 /* The issue arises of what context to evaluate this in. The
7029 same one as when it was set, but what does that mean when
7030 symbols have been re-read? We could save the filename and
7031 functionname, but if the context is more local than that, the
7032 best we could do would be something like how many levels deep
7033 and which index at that particular level, but that's going to
7034 be less stable than filenames or function names. */
7036 /* So for now, just use a global context. */
7039 b
->exp
= parse_expression (b
->exp_string
);
7040 b
->exp_valid_block
= innermost_block
;
7041 mark
= value_mark ();
7043 value_free (b
->val
);
7044 b
->val
= evaluate_expression (b
->exp
);
7045 release_value (b
->val
);
7046 if (VALUE_LAZY (b
->val
))
7047 value_fetch_lazy (b
->val
);
7049 if (b
->cond_string
!= NULL
)
7054 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7056 if (b
->enable_state
== bp_enabled
)
7058 value_free_to_mark (mark
);
7060 case bp_catch_catch
:
7061 case bp_catch_throw
:
7063 /* We needn't really do anything to reset these, since the mask
7064 that requests them is unaffected by e.g., new libraries being
7067 case bp_catch_vfork
:
7072 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
7074 /* Delete longjmp and overlay event breakpoints; they will be
7075 reset later by breakpoint_re_set. */
7077 case bp_longjmp_resume
:
7078 case bp_overlay_event
:
7079 delete_breakpoint (b
);
7082 /* This breakpoint is special, it's set up when the inferior
7083 starts and we really don't want to touch it. */
7084 case bp_shlib_event
:
7086 /* Like bp_shlib_event, this breakpoint type is special.
7087 Once it is set up, we do not want to touch it. */
7088 case bp_thread_event
:
7090 /* Keep temporary breakpoints, which can be encountered when we step
7091 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7092 Otherwise these should have been blown away via the cleanup chain
7093 or by breakpoint_init_inferior when we rerun the executable. */
7096 case bp_watchpoint_scope
:
7098 case bp_step_resume
:
7105 /* Re-set all breakpoints after symbols have been re-loaded. */
7107 breakpoint_re_set (void)
7109 struct breakpoint
*b
, *temp
;
7110 enum language save_language
;
7111 int save_input_radix
;
7112 static char message1
[] = "Error in re-setting breakpoint %d:\n";
7113 char message
[sizeof (message1
) + 30 /* slop */ ];
7115 save_language
= current_language
->la_language
;
7116 save_input_radix
= input_radix
;
7117 ALL_BREAKPOINTS_SAFE (b
, temp
)
7119 /* Format possible error msg */
7120 sprintf (message
, message1
, b
->number
);
7121 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7123 set_language (save_language
);
7124 input_radix
= save_input_radix
;
7126 if (GET_LONGJMP_TARGET_P ())
7128 create_longjmp_breakpoint ("longjmp");
7129 create_longjmp_breakpoint ("_longjmp");
7130 create_longjmp_breakpoint ("siglongjmp");
7131 create_longjmp_breakpoint ("_siglongjmp");
7132 create_longjmp_breakpoint (NULL
);
7135 create_overlay_event_breakpoint ("_ovly_debug_event");
7138 /* Reset the thread number of this breakpoint:
7140 - If the breakpoint is for all threads, leave it as-is.
7141 - Else, reset it to the current thread for inferior_ptid. */
7143 breakpoint_re_set_thread (struct breakpoint
*b
)
7145 if (b
->thread
!= -1)
7147 if (in_thread_list (inferior_ptid
))
7148 b
->thread
= pid_to_thread_id (inferior_ptid
);
7152 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7153 If from_tty is nonzero, it prints a message to that effect,
7154 which ends with a period (no newline). */
7157 set_ignore_count (int bptnum
, int count
, int from_tty
)
7159 register struct breakpoint
*b
;
7165 if (b
->number
== bptnum
)
7167 b
->ignore_count
= count
;
7171 printf_filtered ("Will stop next time breakpoint %d is reached.",
7173 else if (count
== 1)
7174 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7177 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7180 breakpoints_changed ();
7181 breakpoint_modify_event (b
->number
);
7185 error ("No breakpoint number %d.", bptnum
);
7188 /* Clear the ignore counts of all breakpoints. */
7190 breakpoint_clear_ignore_counts (void)
7192 struct breakpoint
*b
;
7195 b
->ignore_count
= 0;
7198 /* Command to set ignore-count of breakpoint N to COUNT. */
7201 ignore_command (char *args
, int from_tty
)
7207 error_no_arg ("a breakpoint number");
7209 num
= get_number (&p
);
7211 error ("bad breakpoint number: '%s'", args
);
7213 error ("Second argument (specified ignore-count) is missing.");
7215 set_ignore_count (num
,
7216 longest_to_int (value_as_long (parse_and_eval (p
))),
7219 printf_filtered ("\n");
7222 /* Call FUNCTION on each of the breakpoints
7223 whose numbers are given in ARGS. */
7226 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7228 register char *p
= args
;
7231 register struct breakpoint
*b
, *tmp
;
7235 error_no_arg ("one or more breakpoint numbers");
7242 num
= get_number_or_range (&p1
);
7245 warning ("bad breakpoint number at or near '%s'", p
);
7249 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7250 if (b
->number
== num
)
7252 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7255 if (related_breakpoint
)
7256 function (related_breakpoint
);
7260 printf_unfiltered ("No breakpoint number %d.\n", num
);
7266 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7267 If from_tty is nonzero, it prints a message to that effect,
7268 which ends with a period (no newline). */
7271 disable_breakpoint (struct breakpoint
*bpt
)
7273 /* Never disable a watchpoint scope breakpoint; we want to
7274 hit them when we leave scope so we can delete both the
7275 watchpoint and its scope breakpoint at that time. */
7276 if (bpt
->type
== bp_watchpoint_scope
)
7279 /* You can't disable permanent breakpoints. */
7280 if (bpt
->enable_state
== bp_permanent
)
7283 bpt
->enable_state
= bp_disabled
;
7285 check_duplicates (bpt
);
7287 if (modify_breakpoint_hook
)
7288 modify_breakpoint_hook (bpt
);
7289 breakpoint_modify_event (bpt
->number
);
7294 disable_command (char *args
, int from_tty
)
7296 register struct breakpoint
*bpt
;
7298 ALL_BREAKPOINTS (bpt
)
7302 warning ("attempted to disable apparently deleted breakpoint #%d?",
7307 case bp_catch_unload
:
7309 case bp_catch_vfork
:
7311 case bp_catch_catch
:
7312 case bp_catch_throw
:
7313 case bp_hardware_breakpoint
:
7315 case bp_hardware_watchpoint
:
7316 case bp_read_watchpoint
:
7317 case bp_access_watchpoint
:
7318 disable_breakpoint (bpt
);
7323 map_breakpoint_numbers (args
, disable_breakpoint
);
7327 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7329 struct frame_info
*save_selected_frame
= NULL
;
7330 int save_selected_frame_level
= -1;
7331 int target_resources_ok
, other_type_used
;
7334 if (bpt
->type
== bp_hardware_breakpoint
)
7337 i
= hw_breakpoint_used_count ();
7338 target_resources_ok
=
7339 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7341 if (target_resources_ok
== 0)
7342 error ("No hardware breakpoint support in the target.");
7343 else if (target_resources_ok
< 0)
7344 error ("Hardware breakpoints used exceeds limit.");
7347 if (bpt
->enable_state
!= bp_permanent
)
7348 bpt
->enable_state
= bp_enabled
;
7349 bpt
->disposition
= disposition
;
7350 check_duplicates (bpt
);
7351 breakpoints_changed ();
7353 if (bpt
->type
== bp_watchpoint
||
7354 bpt
->type
== bp_hardware_watchpoint
||
7355 bpt
->type
== bp_read_watchpoint
||
7356 bpt
->type
== bp_access_watchpoint
)
7358 if (bpt
->exp_valid_block
!= NULL
)
7360 struct frame_info
*fr
=
7361 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7365 Cannot enable watchpoint %d because the block in which its expression\n\
7366 is valid is not currently in scope.\n", bpt
->number
);
7367 bpt
->enable_state
= bp_disabled
;
7371 save_selected_frame
= deprecated_selected_frame
;
7372 save_selected_frame_level
= frame_relative_level (deprecated_selected_frame
);
7376 value_free (bpt
->val
);
7377 mark
= value_mark ();
7378 bpt
->val
= evaluate_expression (bpt
->exp
);
7379 release_value (bpt
->val
);
7380 if (VALUE_LAZY (bpt
->val
))
7381 value_fetch_lazy (bpt
->val
);
7383 if (bpt
->type
== bp_hardware_watchpoint
||
7384 bpt
->type
== bp_read_watchpoint
||
7385 bpt
->type
== bp_access_watchpoint
)
7387 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7388 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7390 /* Hack around 'unused var' error for some targets here */
7392 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7393 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7394 /* we can consider of type is bp_hardware_watchpoint, convert to
7395 bp_watchpoint in the following condition */
7396 if (target_resources_ok
< 0)
7399 Cannot enable watchpoint %d because target watch resources\n\
7400 have been allocated for other watchpoints.\n", bpt
->number
);
7401 bpt
->enable_state
= bp_disabled
;
7402 value_free_to_mark (mark
);
7407 if (save_selected_frame_level
>= 0)
7408 select_frame (save_selected_frame
);
7409 value_free_to_mark (mark
);
7411 if (modify_breakpoint_hook
)
7412 modify_breakpoint_hook (bpt
);
7413 breakpoint_modify_event (bpt
->number
);
7417 enable_breakpoint (struct breakpoint
*bpt
)
7419 do_enable_breakpoint (bpt
, bpt
->disposition
);
7422 /* The enable command enables the specified breakpoints (or all defined
7423 breakpoints) so they once again become (or continue to be) effective
7424 in stopping the inferior. */
7428 enable_command (char *args
, int from_tty
)
7430 register struct breakpoint
*bpt
;
7432 ALL_BREAKPOINTS (bpt
)
7436 warning ("attempted to enable apparently deleted breakpoint #%d?",
7441 case bp_catch_unload
:
7443 case bp_catch_vfork
:
7445 case bp_catch_catch
:
7446 case bp_catch_throw
:
7447 case bp_hardware_breakpoint
:
7449 case bp_hardware_watchpoint
:
7450 case bp_read_watchpoint
:
7451 case bp_access_watchpoint
:
7452 enable_breakpoint (bpt
);
7457 map_breakpoint_numbers (args
, enable_breakpoint
);
7461 enable_once_breakpoint (struct breakpoint
*bpt
)
7463 do_enable_breakpoint (bpt
, disp_disable
);
7468 enable_once_command (char *args
, int from_tty
)
7470 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7474 enable_delete_breakpoint (struct breakpoint
*bpt
)
7476 do_enable_breakpoint (bpt
, disp_del
);
7481 enable_delete_command (char *args
, int from_tty
)
7483 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7486 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7488 struct symtabs_and_lines
7489 decode_line_spec_1 (char *string
, int funfirstline
)
7491 struct symtabs_and_lines sals
;
7493 error ("Empty line specification.");
7494 if (default_breakpoint_valid
)
7495 sals
= decode_line_1 (&string
, funfirstline
,
7496 default_breakpoint_symtab
,
7497 default_breakpoint_line
,
7500 sals
= decode_line_1 (&string
, funfirstline
,
7501 (struct symtab
*) NULL
, 0, (char ***) NULL
);
7503 error ("Junk at end of line specification: %s", string
);
7508 _initialize_breakpoint (void)
7510 struct cmd_list_element
*c
;
7512 breakpoint_chain
= 0;
7513 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7514 before a breakpoint is set. */
7515 breakpoint_count
= 0;
7517 add_com ("ignore", class_breakpoint
, ignore_command
,
7518 "Set ignore-count of breakpoint number N to COUNT.\n\
7519 Usage is `ignore N COUNT'.");
7521 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7523 add_com ("commands", class_breakpoint
, commands_command
,
7524 "Set commands to be executed when a breakpoint is hit.\n\
7525 Give breakpoint number as argument after \"commands\".\n\
7526 With no argument, the targeted breakpoint is the last one set.\n\
7527 The commands themselves follow starting on the next line.\n\
7528 Type a line containing \"end\" to indicate the end of them.\n\
7529 Give \"silent\" as the first line to make the breakpoint silent;\n\
7530 then no output is printed when it is hit, except what the commands print.");
7532 add_com ("condition", class_breakpoint
, condition_command
,
7533 "Specify breakpoint number N to break only if COND is true.\n\
7534 Usage is `condition N COND', where N is an integer and COND is an\n\
7535 expression to be evaluated whenever breakpoint N is reached.");
7537 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7538 "Set a temporary breakpoint. Args like \"break\" command.\n\
7539 Like \"break\" except the breakpoint is only temporary,\n\
7540 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7541 by using \"enable delete\" on the breakpoint number.");
7542 set_cmd_completer (c
, location_completer
);
7544 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7545 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7546 Like \"break\" except the breakpoint requires hardware support,\n\
7547 some target hardware may not have this support.");
7548 set_cmd_completer (c
, location_completer
);
7550 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7551 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7552 Like \"hbreak\" except the breakpoint is only temporary,\n\
7553 so it will be deleted when hit.");
7554 set_cmd_completer (c
, location_completer
);
7556 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7557 "Enable some breakpoints.\n\
7558 Give breakpoint numbers (separated by spaces) as arguments.\n\
7559 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7560 This is used to cancel the effect of the \"disable\" command.\n\
7561 With a subcommand you can enable temporarily.",
7562 &enablelist
, "enable ", 1, &cmdlist
);
7564 add_com ("ab", class_breakpoint
, enable_command
,
7565 "Enable some breakpoints.\n\
7566 Give breakpoint numbers (separated by spaces) as arguments.\n\
7567 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7568 This is used to cancel the effect of the \"disable\" command.\n\
7569 With a subcommand you can enable temporarily.");
7571 add_com_alias ("en", "enable", class_breakpoint
, 1);
7573 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7574 "Enable some breakpoints.\n\
7575 Give breakpoint numbers (separated by spaces) as arguments.\n\
7576 This is used to cancel the effect of the \"disable\" command.\n\
7577 May be abbreviated to simply \"enable\".\n",
7578 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7580 add_cmd ("once", no_class
, enable_once_command
,
7581 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7582 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7585 add_cmd ("delete", no_class
, enable_delete_command
,
7586 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7587 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7590 add_cmd ("delete", no_class
, enable_delete_command
,
7591 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7592 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7595 add_cmd ("once", no_class
, enable_once_command
,
7596 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7597 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7600 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7601 "Disable some breakpoints.\n\
7602 Arguments are breakpoint numbers with spaces in between.\n\
7603 To disable all breakpoints, give no argument.\n\
7604 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7605 &disablelist
, "disable ", 1, &cmdlist
);
7606 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7607 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7609 add_com ("sb", class_breakpoint
, disable_command
,
7610 "Disable some breakpoints.\n\
7611 Arguments are breakpoint numbers with spaces in between.\n\
7612 To disable all breakpoints, give no argument.\n\
7613 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7615 add_cmd ("breakpoints", class_alias
, disable_command
,
7616 "Disable some breakpoints.\n\
7617 Arguments are breakpoint numbers with spaces in between.\n\
7618 To disable all breakpoints, give no argument.\n\
7619 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7620 This command may be abbreviated \"disable\".",
7623 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7624 "Delete some breakpoints or auto-display expressions.\n\
7625 Arguments are breakpoint numbers with spaces in between.\n\
7626 To delete all breakpoints, give no argument.\n\
7628 Also a prefix command for deletion of other GDB objects.\n\
7629 The \"unset\" command is also an alias for \"delete\".",
7630 &deletelist
, "delete ", 1, &cmdlist
);
7631 add_com_alias ("d", "delete", class_breakpoint
, 1);
7633 add_com ("db", class_breakpoint
, delete_command
,
7634 "Delete some breakpoints.\n\
7635 Arguments are breakpoint numbers with spaces in between.\n\
7636 To delete all breakpoints, give no argument.\n");
7638 add_cmd ("breakpoints", class_alias
, delete_command
,
7639 "Delete some breakpoints or auto-display expressions.\n\
7640 Arguments are breakpoint numbers with spaces in between.\n\
7641 To delete all breakpoints, give no argument.\n\
7642 This command may be abbreviated \"delete\".",
7645 add_com ("clear", class_breakpoint
, clear_command
,
7646 concat ("Clear breakpoint at specified line or function.\n\
7647 Argument may be line number, function name, or \"*\" and an address.\n\
7648 If line number is specified, all breakpoints in that line are cleared.\n\
7649 If function is specified, breakpoints at beginning of function are cleared.\n\
7650 If an address is specified, breakpoints at that address are cleared.\n\n",
7651 "With no argument, clears all breakpoints in the line that the selected frame\n\
7654 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7656 c
= add_com ("break", class_breakpoint
, break_command
,
7657 concat ("Set breakpoint at specified line or function.\n\
7658 Argument may be line number, function name, or \"*\" and an address.\n\
7659 If line number is specified, break at start of code for that line.\n\
7660 If function is specified, break at start of code for that function.\n\
7661 If an address is specified, break at that exact address.\n",
7662 "With no arg, uses current execution address of selected stack frame.\n\
7663 This is useful for breaking on return to a stack frame.\n\
7665 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7667 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7668 set_cmd_completer (c
, location_completer
);
7670 add_com_alias ("b", "break", class_run
, 1);
7671 add_com_alias ("br", "break", class_run
, 1);
7672 add_com_alias ("bre", "break", class_run
, 1);
7673 add_com_alias ("brea", "break", class_run
, 1);
7677 add_com_alias ("ba", "break", class_breakpoint
, 1);
7678 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7683 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7684 "Break in function/address or break at a line in the current file.",
7685 &stoplist
, "stop ", 1, &cmdlist
);
7686 add_cmd ("in", class_breakpoint
, stopin_command
,
7687 "Break in function or address.\n", &stoplist
);
7688 add_cmd ("at", class_breakpoint
, stopat_command
,
7689 "Break at a line in the current file.\n", &stoplist
);
7690 add_com ("status", class_info
, breakpoints_info
,
7691 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7692 The \"Type\" column indicates one of:\n\
7693 \tbreakpoint - normal breakpoint\n\
7694 \twatchpoint - watchpoint\n\
7695 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7696 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7697 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7698 address and file/line number respectively.\n\n",
7699 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7700 are set to the address of the last breakpoint listed.\n\n\
7701 Convenience variable \"$bpnum\" contains the number of the last\n\
7702 breakpoint set.", NULL
));
7705 add_info ("breakpoints", breakpoints_info
,
7706 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7707 The \"Type\" column indicates one of:\n\
7708 \tbreakpoint - normal breakpoint\n\
7709 \twatchpoint - watchpoint\n\
7710 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7711 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7712 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7713 address and file/line number respectively.\n\n",
7714 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7715 are set to the address of the last breakpoint listed.\n\n\
7716 Convenience variable \"$bpnum\" contains the number of the last\n\
7717 breakpoint set.", NULL
));
7720 add_com ("lb", class_breakpoint
, breakpoints_info
,
7721 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7722 The \"Type\" column indicates one of:\n\
7723 \tbreakpoint - normal breakpoint\n\
7724 \twatchpoint - watchpoint\n\
7725 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7726 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7727 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7728 address and file/line number respectively.\n\n",
7729 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7730 are set to the address of the last breakpoint listed.\n\n\
7731 Convenience variable \"$bpnum\" contains the number of the last\n\
7732 breakpoint set.", NULL
));
7734 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7735 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7736 The \"Type\" column indicates one of:\n\
7737 \tbreakpoint - normal breakpoint\n\
7738 \twatchpoint - watchpoint\n\
7739 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7740 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7741 \tuntil - internal breakpoint used by the \"until\" command\n\
7742 \tfinish - internal breakpoint used by the \"finish\" command\n",
7743 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7744 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7745 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7746 address and file/line number respectively.\n\n",
7747 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7748 are set to the address of the last breakpoint listed.\n\n\
7749 Convenience variable \"$bpnum\" contains the number of the last\n\
7750 breakpoint set.", NULL
),
7751 &maintenanceinfolist
);
7753 add_com ("catch", class_breakpoint
, catch_command
,
7754 "Set catchpoints to catch events.\n\
7755 Raised signals may be caught:\n\
7756 \tcatch signal - all signals\n\
7757 \tcatch signal <signame> - a particular signal\n\
7758 Raised exceptions may be caught:\n\
7759 \tcatch throw - all exceptions, when thrown\n\
7760 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7761 \tcatch catch - all exceptions, when caught\n\
7762 \tcatch catch <exceptname> - a particular exception, when caught\n\
7763 Thread or process events may be caught:\n\
7764 \tcatch thread_start - any threads, just after creation\n\
7765 \tcatch thread_exit - any threads, just before expiration\n\
7766 \tcatch thread_join - any threads, just after joins\n\
7767 Process events may be caught:\n\
7768 \tcatch start - any processes, just after creation\n\
7769 \tcatch exit - any processes, just before expiration\n\
7770 \tcatch fork - calls to fork()\n\
7771 \tcatch vfork - calls to vfork()\n\
7772 \tcatch exec - calls to exec()\n\
7773 Dynamically-linked library events may be caught:\n\
7774 \tcatch load - loads of any library\n\
7775 \tcatch load <libname> - loads of a particular library\n\
7776 \tcatch unload - unloads of any library\n\
7777 \tcatch unload <libname> - unloads of a particular library\n\
7778 The act of your program's execution stopping may also be caught:\n\
7780 C++ exceptions may be caught:\n\
7781 \tcatch throw - all exceptions, when thrown\n\
7782 \tcatch catch - all exceptions, when caught\n\
7784 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7785 after a fork or vfork is caught.\n\n\
7786 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7788 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7789 "Set temporary catchpoints to catch events.\n\
7790 Args like \"catch\" command.\n\
7791 Like \"catch\" except the catchpoint is only temporary,\n\
7792 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7793 by using \"enable delete\" on the catchpoint number.");
7795 c
= add_com ("watch", class_breakpoint
, watch_command
,
7796 "Set a watchpoint for an expression.\n\
7797 A watchpoint stops execution of your program whenever the value of\n\
7798 an expression changes.");
7799 set_cmd_completer (c
, location_completer
);
7801 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
7802 "Set a read watchpoint for an expression.\n\
7803 A watchpoint stops execution of your program whenever the value of\n\
7804 an expression is read.");
7805 set_cmd_completer (c
, location_completer
);
7807 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
7808 "Set a watchpoint for an expression.\n\
7809 A watchpoint stops execution of your program whenever the value of\n\
7810 an expression is either read or written.");
7811 set_cmd_completer (c
, location_completer
);
7813 add_info ("watchpoints", breakpoints_info
,
7814 "Synonym for ``info breakpoints''.");
7817 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
7818 (char *) &can_use_hw_watchpoints
,
7819 "Set debugger's willingness to use watchpoint hardware.\n\
7820 If zero, gdb will not use hardware for new watchpoints, even if\n\
7821 such is available. (However, any hardware watchpoints that were\n\
7822 created before setting this to nonzero, will continue to use watchpoint\n\
7825 add_show_from_set (c
, &showlist
);
7827 can_use_hw_watchpoints
= 1;