1 /* Everything about breakpoints, for GDB.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
28 #include "breakpoint.h"
30 #include "expression.h"
36 #include "gdbthread.h"
39 #include "gdb_string.h"
46 #include "completer.h"
49 #include "cli/cli-script.h"
50 #include "gdb_assert.h"
53 #include "gdb-events.h"
55 /* Prototypes for local functions. */
57 static void until_break_command_continuation (struct continuation_arg
*arg
);
59 static void catch_command_1 (char *, int, int);
61 static void enable_delete_command (char *, int);
63 static void enable_delete_breakpoint (struct breakpoint
*);
65 static void enable_once_command (char *, int);
67 static void enable_once_breakpoint (struct breakpoint
*);
69 static void disable_command (char *, int);
71 static void enable_command (char *, int);
73 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
75 static void ignore_command (char *, int);
77 static int breakpoint_re_set_one (void *);
79 static void clear_command (char *, int);
81 static void catch_command (char *, int);
83 static void handle_gnu_4_16_catch_command (char *, int, int);
85 static struct symtabs_and_lines
get_catch_sals (int);
87 static void watch_command (char *, int);
89 static int can_use_hardware_watchpoint (struct value
*);
91 extern void break_at_finish_command (char *, int);
92 extern void break_at_finish_at_depth_command (char *, int);
94 extern void tbreak_at_finish_command (char *, int);
96 static void break_command_1 (char *, int, int);
98 static void mention (struct breakpoint
*);
100 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
102 static void check_duplicates (struct breakpoint
*);
104 static void describe_other_breakpoints (CORE_ADDR
, asection
*);
106 static void breakpoints_info (char *, int);
108 static void breakpoint_1 (int, int);
110 static bpstat
bpstat_alloc (struct breakpoint
*, bpstat
);
112 static int breakpoint_cond_eval (void *);
114 static void cleanup_executing_breakpoints (void *);
116 static void commands_command (char *, int);
118 static void condition_command (char *, int);
120 static int get_number_trailer (char **, int);
122 void set_breakpoint_count (int);
131 static int remove_breakpoint (struct breakpoint
*, insertion_state_t
);
133 static enum print_stop_action
print_it_typical (bpstat
);
135 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
139 enum exception_event_kind kind
;
142 args_for_catchpoint_enable
;
144 static int watchpoint_check (void *);
146 static int cover_target_enable_exception_callback (void *);
148 static void maintenance_info_breakpoints (char *, int);
150 static void create_longjmp_breakpoint (char *);
152 static void create_overlay_event_breakpoint (char *);
154 static int hw_breakpoint_used_count (void);
156 static int hw_watchpoint_used_count (enum bptype
, int *);
158 static void hbreak_command (char *, int);
160 static void thbreak_command (char *, int);
162 static void watch_command_1 (char *, int, int);
164 static void rwatch_command (char *, int);
166 static void awatch_command (char *, int);
168 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
170 static void solib_load_unload_1 (char *hookname
,
173 char *cond_string
, enum bptype bp_kind
);
175 static void create_fork_vfork_event_catchpoint (int tempflag
,
177 enum bptype bp_kind
);
179 static void break_at_finish_at_depth_command_1 (char *arg
,
180 int flag
, int from_tty
);
182 static void break_at_finish_command_1 (char *arg
, int flag
, int from_tty
);
184 static void stop_command (char *arg
, int from_tty
);
186 static void stopin_command (char *arg
, int from_tty
);
188 static void stopat_command (char *arg
, int from_tty
);
190 static char *ep_find_event_name_end (char *arg
);
192 static char *ep_parse_optional_if_clause (char **arg
);
194 static char *ep_parse_optional_filename (char **arg
);
196 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
197 static void catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
);
200 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
201 enum exception_event_kind ex_event
,
202 struct symtab_and_line
*sal
);
204 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
205 char *arg
, int tempflag
, int from_tty
);
207 static void tcatch_command (char *arg
, int from_tty
);
209 static void ep_skip_leading_whitespace (char **s
);
211 /* Prototypes for exported functions. */
213 /* If FALSE, gdb will not use hardware support for watchpoints, even
214 if such is available. */
215 static int can_use_hw_watchpoints
;
217 void _initialize_breakpoint (void);
219 extern int addressprint
; /* Print machine addresses? */
221 /* Are we executing breakpoint commands? */
222 static int executing_breakpoint_commands
;
224 /* Are overlay event breakpoints enabled? */
225 static int overlay_events_enabled
;
227 /* Walk the following statement or block through all breakpoints.
228 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
231 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
233 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
234 for (B = breakpoint_chain; \
235 B ? (TMP=B->next, 1): 0; \
238 /* True if SHIFT_INST_REGS defined, false otherwise. */
240 int must_shift_inst_regs
=
241 #if defined(SHIFT_INST_REGS)
248 /* True if breakpoint hit counts should be displayed in breakpoint info. */
250 int show_breakpoint_hit_counts
= 1;
252 /* Chain of all breakpoints defined. */
254 struct breakpoint
*breakpoint_chain
;
256 /* Number of last breakpoint made. */
258 int breakpoint_count
;
260 /* Pointer to current exception event record */
261 static struct exception_event_record
*current_exception_event
;
263 /* Indicator of whether exception catchpoints should be nuked
264 between runs of a program */
265 int exception_catchpoints_are_fragile
= 0;
267 /* Indicator of when exception catchpoints set-up should be
268 reinitialized -- e.g. when program is re-run */
269 int exception_support_initialized
= 0;
271 /* This function returns a pointer to the string representation of the
272 pathname of the dynamically-linked library that has just been
275 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
276 or undefined results are guaranteed.
278 This string's contents are only valid immediately after the
279 inferior has stopped in the dynamic linker hook, and becomes
280 invalid as soon as the inferior is continued. Clients should make
281 a copy of this string if they wish to continue the inferior and
282 then access the string. */
284 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
285 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
288 /* This function returns a pointer to the string representation of the
289 pathname of the dynamically-linked library that has just been
292 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
293 TRUE, or undefined results are guaranteed.
295 This string's contents are only valid immediately after the
296 inferior has stopped in the dynamic linker hook, and becomes
297 invalid as soon as the inferior is continued. Clients should make
298 a copy of this string if they wish to continue the inferior and
299 then access the string. */
301 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
302 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
305 /* This function is called by the "catch load" command. It allows the
306 debugger to be notified by the dynamic linker when a specified
307 library file (or any library file, if filename is NULL) is loaded. */
309 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
310 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
311 error ("catch of library loads not yet implemented on this platform")
314 /* This function is called by the "catch unload" command. It allows
315 the debugger to be notified by the dynamic linker when a specified
316 library file (or any library file, if filename is NULL) is
319 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
320 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
321 error ("catch of library unloads not yet implemented on this platform")
324 /* Set breakpoint count to NUM. */
327 set_breakpoint_count (int num
)
329 breakpoint_count
= num
;
330 set_internalvar (lookup_internalvar ("bpnum"),
331 value_from_longest (builtin_type_int
, (LONGEST
) num
));
334 /* Used in run_command to zero the hit count when a new run starts. */
337 clear_breakpoint_hit_counts (void)
339 struct breakpoint
*b
;
345 /* Default address, symtab and line to put a breakpoint at
346 for "break" command with no arg.
347 if default_breakpoint_valid is zero, the other three are
348 not valid, and "break" with no arg is an error.
350 This set by print_stack_frame, which calls set_default_breakpoint. */
352 int default_breakpoint_valid
;
353 CORE_ADDR default_breakpoint_address
;
354 struct symtab
*default_breakpoint_symtab
;
355 int default_breakpoint_line
;
357 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
358 Advance *PP after the string and any trailing whitespace.
360 Currently the string can either be a number or "$" followed by the name
361 of a convenience variable. Making it an expression wouldn't work well
362 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
364 TRAILER is a character which can be found after the number; most
365 commonly this is `-'. If you don't want a trailer, use \0. */
367 get_number_trailer (char **pp
, int trailer
)
369 int retval
= 0; /* default */
373 /* Empty line means refer to the last breakpoint. */
374 return breakpoint_count
;
377 /* Make a copy of the name, so we can null-terminate it
378 to pass to lookup_internalvar(). */
383 while (isalnum (*p
) || *p
== '_')
385 varname
= (char *) alloca (p
- start
+ 1);
386 strncpy (varname
, start
, p
- start
);
387 varname
[p
- start
] = '\0';
388 val
= value_of_internalvar (lookup_internalvar (varname
));
389 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_INT
)
390 retval
= (int) value_as_long (val
);
393 printf_filtered ("Convenience variable must have integer value.\n");
401 while (*p
>= '0' && *p
<= '9')
404 /* There is no number here. (e.g. "cond a == b"). */
406 /* Skip non-numeric token */
407 while (*p
&& !isspace((int) *p
))
409 /* Return zero, which caller must interpret as error. */
415 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
417 /* Trailing junk: return 0 and let caller print error msg. */
418 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
429 /* Like get_number_trailer, but don't allow a trailer. */
431 get_number (char **pp
)
433 return get_number_trailer (pp
, '\0');
436 /* Parse a number or a range.
437 * A number will be of the form handled by get_number.
438 * A range will be of the form <number1> - <number2>, and
439 * will represent all the integers between number1 and number2,
442 * While processing a range, this fuction is called iteratively;
443 * At each call it will return the next value in the range.
445 * At the beginning of parsing a range, the char pointer PP will
446 * be advanced past <number1> and left pointing at the '-' token.
447 * Subsequent calls will not advance the pointer until the range
448 * is completed. The call that completes the range will advance
449 * pointer PP past <number2>.
453 get_number_or_range (char **pp
)
455 static int last_retval
, end_value
;
456 static char *end_ptr
;
457 static int in_range
= 0;
461 /* Default case: pp is pointing either to a solo number,
462 or to the first number of a range. */
463 last_retval
= get_number_trailer (pp
, '-');
468 /* This is the start of a range (<number1> - <number2>).
469 Skip the '-', parse and remember the second number,
470 and also remember the end of the final token. */
474 while (isspace ((int) *end_ptr
))
475 end_ptr
++; /* skip white space */
476 end_value
= get_number (temp
);
477 if (end_value
< last_retval
)
479 error ("inverted range");
481 else if (end_value
== last_retval
)
483 /* degenerate range (number1 == number2). Advance the
484 token pointer so that the range will be treated as a
493 error ("negative value");
496 /* pp points to the '-' that betokens a range. All
497 number-parsing has already been done. Return the next
498 integer value (one greater than the saved previous value).
499 Do not advance the token pointer 'pp' until the end of range
502 if (++last_retval
== end_value
)
504 /* End of range reached; advance token pointer. */
514 /* condition N EXP -- set break condition of breakpoint N to EXP. */
517 condition_command (char *arg
, int from_tty
)
519 register struct breakpoint
*b
;
524 error_no_arg ("breakpoint number");
527 bnum
= get_number (&p
);
529 error ("Bad breakpoint argument: '%s'", arg
);
532 if (b
->number
== bnum
)
539 if (b
->cond_string
!= NULL
)
540 xfree (b
->cond_string
);
545 b
->cond_string
= NULL
;
547 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
552 /* I don't know if it matters whether this is the string the user
553 typed in or the decompiled expression. */
554 b
->cond_string
= savestring (arg
, strlen (arg
));
555 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->address
), 0);
557 error ("Junk at end of expression");
559 breakpoints_changed ();
560 breakpoint_modify_event (b
->number
);
564 error ("No breakpoint number %d.", bnum
);
569 commands_command (char *arg
, int from_tty
)
571 register struct breakpoint
*b
;
574 struct command_line
*l
;
576 /* If we allowed this, we would have problems with when to
577 free the storage, if we change the commands currently
580 if (executing_breakpoint_commands
)
581 error ("Can't use the \"commands\" command among a breakpoint's commands.");
584 bnum
= get_number (&p
);
587 error ("Unexpected extra arguments following breakpoint number.");
590 if (b
->number
== bnum
)
594 "Type commands for when breakpoint %d is hit, one per line.",
596 l
= read_command_lines (tmpbuf
, from_tty
);
597 free_command_lines (&b
->commands
);
599 breakpoints_changed ();
600 breakpoint_modify_event (b
->number
);
603 error ("No breakpoint number %d.", bnum
);
606 /* Like target_read_memory() but if breakpoints are inserted, return
607 the shadow contents instead of the breakpoints themselves.
609 Read "memory data" from whatever target or inferior we have.
610 Returns zero if successful, errno value if not. EIO is used
611 for address out of bounds. If breakpoints are inserted, returns
612 shadow contents, not the breakpoints themselves. From breakpoint.c. */
615 read_memory_nobpt (CORE_ADDR memaddr
, char *myaddr
, unsigned len
)
618 struct breakpoint
*b
;
619 CORE_ADDR bp_addr
= 0;
622 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
623 /* No breakpoints on this machine. */
624 return target_read_memory (memaddr
, myaddr
, len
);
628 if (b
->type
== bp_none
)
629 warning ("reading through apparently deleted breakpoint #%d?",
632 /* memory breakpoint? */
633 if (b
->type
== bp_watchpoint
634 || b
->type
== bp_hardware_watchpoint
635 || b
->type
== bp_read_watchpoint
636 || b
->type
== bp_access_watchpoint
)
641 /* Addresses and length of the part of the breakpoint that
643 /* XXXX The m68k, sh and h8300 have different local and remote
644 breakpoint values. BREAKPOINT_FROM_PC still manages to
645 correctly determine the breakpoints memory address and size
646 for these targets. */
647 bp_addr
= b
->address
;
649 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
654 if (bp_addr
+ bp_size
<= memaddr
)
655 /* The breakpoint is entirely before the chunk of memory we
658 if (bp_addr
>= memaddr
+ len
)
659 /* The breakpoint is entirely after the chunk of memory we are
662 /* Copy the breakpoint from the shadow contents, and recurse for
663 the things before and after. */
665 /* Offset within shadow_contents. */
668 if (bp_addr
< memaddr
)
670 /* Only copy the second part of the breakpoint. */
671 bp_size
-= memaddr
- bp_addr
;
672 bptoffset
= memaddr
- bp_addr
;
676 if (bp_addr
+ bp_size
> memaddr
+ len
)
678 /* Only copy the first part of the breakpoint. */
679 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
682 memcpy (myaddr
+ bp_addr
- memaddr
,
683 b
->shadow_contents
+ bptoffset
, bp_size
);
685 if (bp_addr
> memaddr
)
687 /* Copy the section of memory before the breakpoint. */
688 status
= read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
693 if (bp_addr
+ bp_size
< memaddr
+ len
)
695 /* Copy the section of memory after the breakpoint. */
696 status
= read_memory_nobpt (bp_addr
+ bp_size
,
697 myaddr
+ bp_addr
+ bp_size
- memaddr
,
698 memaddr
+ len
- (bp_addr
+ bp_size
));
705 /* Nothing overlaps. Just call read_memory_noerr. */
706 return target_read_memory (memaddr
, myaddr
, len
);
710 /* insert_breakpoints is used when starting or continuing the program.
711 remove_breakpoints is used when the program stops.
712 Both return zero if successful,
713 or an `errno' value if could not write the inferior. */
716 insert_breakpoints (void)
718 register struct breakpoint
*b
, *temp
;
719 int return_val
= 0; /* return success code. */
721 int disabled_breaks
= 0;
722 int hw_breakpoint_error
= 0;
723 #ifdef ONE_PROCESS_WRITETEXT
724 int process_warning
= 0;
727 static char message1
[] = "Error inserting catchpoint %d:\n";
728 static char message
[sizeof (message1
) + 30];
730 struct ui_file
*tmp_error_stream
= mem_fileopen ();
731 make_cleanup_ui_file_delete (tmp_error_stream
);
733 /* Explicitly mark the warning -- this will only be printed if
734 there was an error. */
735 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
737 ALL_BREAKPOINTS_SAFE (b
, temp
)
739 /* Permanent breakpoints cannot be inserted or removed. Disabled
740 breakpoints should not be inserted. */
741 if (b
->enable_state
!= bp_enabled
)
744 if ((b
->type
== bp_watchpoint
745 || b
->type
== bp_hardware_watchpoint
746 || b
->type
== bp_read_watchpoint
747 || b
->type
== bp_access_watchpoint
) && (!b
->val
))
750 val
= evaluate_expression (b
->exp
);
752 if (VALUE_LAZY (val
))
753 value_fetch_lazy (val
);
756 if (b
->type
!= bp_watchpoint
757 && b
->type
!= bp_hardware_watchpoint
758 && b
->type
!= bp_read_watchpoint
759 && b
->type
!= bp_access_watchpoint
760 && b
->type
!= bp_catch_fork
761 && b
->type
!= bp_catch_vfork
762 && b
->type
!= bp_catch_exec
763 && b
->type
!= bp_catch_throw
764 && b
->type
!= bp_catch_catch
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
)
887 /* If we get here, we must have a callback mechanism for exception
888 events -- with g++ style embedded label support, we insert
889 ordinary breakpoints and not catchpoints. */
890 /* Format possible error message */
891 sprintf (message
, message1
, b
->number
);
893 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
896 /* Couldn't set breakpoint for some reason */
897 fprintf_unfiltered (tmp_error_stream
,
898 "Cannot insert catchpoint %d; disabling it.\n",
900 fprintf_filtered (tmp_error_stream
,
901 "Error accessing memory address ");
902 print_address_numeric (b
->address
, 1, tmp_error_stream
);
903 fprintf_filtered (tmp_error_stream
, ": %s.\n",
904 safe_strerror (val
));
905 b
->enable_state
= bp_disabled
;
909 /* Bp set, now make sure callbacks are enabled */
911 args_for_catchpoint_enable args
;
912 args
.kind
= b
->type
== bp_catch_catch
?
913 EX_EVENT_CATCH
: EX_EVENT_THROW
;
915 val
= catch_errors (cover_target_enable_exception_callback
,
917 message
, RETURN_MASK_ALL
);
918 if (val
!= 0 && val
!= -1)
922 /* Check if something went wrong; val == 0 can be ignored */
925 /* something went wrong */
926 fprintf_unfiltered (tmp_error_stream
,
927 "Cannot insert catchpoint %d; disabling it.\n",
929 b
->enable_state
= bp_disabled
;
934 return_val
= val
; /* remember failure */
937 else if ((b
->type
== bp_hardware_watchpoint
||
938 b
->type
== bp_read_watchpoint
||
939 b
->type
== bp_access_watchpoint
)
940 && b
->disposition
!= disp_del_at_next_stop
944 struct frame_info
*saved_frame
;
945 int saved_level
, within_current_scope
;
946 struct value
*mark
= value_mark ();
949 /* Save the current frame and level so we can restore it after
950 evaluating the watchpoint expression on its own frame. */
951 saved_frame
= deprecated_selected_frame
;
952 saved_level
= frame_relative_level (deprecated_selected_frame
);
954 /* Determine if the watchpoint is within scope. */
955 if (b
->exp_valid_block
== NULL
)
956 within_current_scope
= 1;
959 struct frame_info
*fi
;
960 fi
= frame_find_by_id (b
->watchpoint_frame
);
961 within_current_scope
= (fi
!= NULL
);
962 if (within_current_scope
)
966 if (within_current_scope
)
968 /* Evaluate the expression and cut the chain of values
969 produced off from the value chain.
971 Make sure the value returned isn't lazy; we use
972 laziness to determine what memory GDB actually needed
973 in order to compute the value of the expression. */
974 v
= evaluate_expression (b
->exp
);
976 value_release_to_mark (mark
);
981 /* Look at each value on the value chain. */
982 for (; v
; v
= v
->next
)
984 /* If it's a memory location, and GDB actually needed
985 its contents to evaluate the expression, then we
987 if (VALUE_LVAL (v
) == lval_memory
990 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
992 /* We only watch structs and arrays if user asked
993 for it explicitly, never if they just happen to
994 appear in the middle of some value chain. */
995 if (v
== b
->val_chain
996 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
997 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1002 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1003 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1005 if (b
->type
== bp_read_watchpoint
)
1007 else if (b
->type
== bp_access_watchpoint
)
1010 val
= target_insert_watchpoint (addr
, len
, type
);
1013 /* Don't exit the loop, try to insert
1014 every value on the value chain. That's
1015 because we will be removing all the
1016 watches below, and removing a
1017 watchpoint we didn't insert could have
1025 /* Failure to insert a watchpoint on any memory value in the
1026 value chain brings us here. */
1029 remove_breakpoint (b
, mark_uninserted
);
1030 hw_breakpoint_error
= 1;
1031 fprintf_unfiltered (tmp_error_stream
,
1032 "Could not insert hardware watchpoint %d.\n",
1039 printf_filtered ("Hardware watchpoint %d deleted ", b
->number
);
1040 printf_filtered ("because the program has left the block \n");
1041 printf_filtered ("in which its expression is valid.\n");
1042 if (b
->related_breakpoint
)
1043 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1044 b
->disposition
= disp_del_at_next_stop
;
1047 /* Restore the frame and level. */
1048 if ((saved_frame
!= deprecated_selected_frame
) ||
1049 (saved_level
!= frame_relative_level (deprecated_selected_frame
)))
1050 select_frame (saved_frame
);
1053 return_val
= val
; /* remember failure */
1055 else if ((b
->type
== bp_catch_fork
1056 || b
->type
== bp_catch_vfork
1057 || b
->type
== bp_catch_exec
)
1065 val
= target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
1067 case bp_catch_vfork
:
1068 val
= target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
1071 val
= target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
1074 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1079 fprintf_unfiltered (tmp_error_stream
,
1080 "Cannot insert catchpoint %d.", b
->number
);
1086 return_val
= val
; /* remember failure */
1092 /* If a hardware breakpoint or watchpoint was inserted, add a
1093 message about possibly exhausted resources. */
1094 if (hw_breakpoint_error
)
1096 fprintf_unfiltered (tmp_error_stream
,
1097 "Could not insert hardware breakpoints:\n\
1098 You may have requested too many hardware breakpoints/watchpoints.\n");
1100 #ifdef ONE_PROCESS_WRITETEXT
1101 if (process_warning
)
1102 fprintf_unfiltered (tmp_error_stream
,
1103 "The same program may be running in another process.");
1105 target_terminal_ours_for_output ();
1106 error_stream (tmp_error_stream
);
1112 remove_breakpoints (void)
1114 register struct breakpoint
*b
;
1121 val
= remove_breakpoint (b
, mark_uninserted
);
1130 remove_hw_watchpoints (void)
1132 register struct breakpoint
*b
;
1138 && (b
->type
== bp_hardware_watchpoint
1139 || b
->type
== bp_read_watchpoint
1140 || b
->type
== bp_access_watchpoint
))
1142 val
= remove_breakpoint (b
, mark_uninserted
);
1151 reattach_breakpoints (int pid
)
1153 register struct breakpoint
*b
;
1155 struct cleanup
*old_chain
= save_inferior_ptid ();
1157 /* Set inferior_ptid; remove_breakpoint uses this global. */
1158 inferior_ptid
= pid_to_ptid (pid
);
1163 remove_breakpoint (b
, mark_inserted
);
1164 if (b
->type
== bp_hardware_breakpoint
)
1165 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1167 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1170 do_cleanups (old_chain
);
1175 do_cleanups (old_chain
);
1180 update_breakpoints_after_exec (void)
1182 struct breakpoint
*b
;
1183 struct breakpoint
*temp
;
1185 /* Doing this first prevents the badness of having delete_breakpoint()
1186 write a breakpoint's current "shadow contents" to lift the bp. That
1187 shadow is NOT valid after an exec()! */
1188 mark_breakpoints_out ();
1190 ALL_BREAKPOINTS_SAFE (b
, temp
)
1192 /* Solib breakpoints must be explicitly reset after an exec(). */
1193 if (b
->type
== bp_shlib_event
)
1195 delete_breakpoint (b
);
1199 /* Thread event breakpoints must be set anew after an exec(),
1200 as must overlay event breakpoints. */
1201 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1203 delete_breakpoint (b
);
1207 /* Step-resume breakpoints are meaningless after an exec(). */
1208 if (b
->type
== bp_step_resume
)
1210 delete_breakpoint (b
);
1214 /* Ditto the sigtramp handler breakpoints. */
1215 if (b
->type
== bp_through_sigtramp
)
1217 delete_breakpoint (b
);
1221 /* Ditto the exception-handling catchpoints. */
1222 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1224 delete_breakpoint (b
);
1228 /* Don't delete an exec catchpoint, because else the inferior
1229 won't stop when it ought!
1231 Similarly, we probably ought to keep vfork catchpoints, 'cause
1232 on this target, we may not be able to stop when the vfork is
1233 seen, but only when the subsequent exec is seen. (And because
1234 deleting fork catchpoints here but not vfork catchpoints will
1235 seem mysterious to users, keep those too.)
1237 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1238 target address field, if any, is sufficient to have it be reset
1239 automagically. Certainly on HP-UX that's true.
1241 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1242 valid code address on some platforms (like the OBSOLETE mn10200
1243 and mn10300 simulators). We shouldn't assign any special
1244 interpretation to a breakpoint with a zero address. And in
1245 fact, GDB doesn't --- I can't see what that comment above is
1246 talking about. As far as I can tell, setting the address of a
1247 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1248 is meaningless, since those are implemented with HP-UX kernel
1249 hackery, not by storing breakpoint instructions somewhere. */
1250 if ((b
->type
== bp_catch_exec
) ||
1251 (b
->type
== bp_catch_vfork
) ||
1252 (b
->type
== bp_catch_fork
))
1254 b
->address
= (CORE_ADDR
) NULL
;
1258 /* bp_finish is a special case. The only way we ought to be able
1259 to see one of these when an exec() has happened, is if the user
1260 caught a vfork, and then said "finish". Ordinarily a finish just
1261 carries them to the call-site of the current callee, by setting
1262 a temporary bp there and resuming. But in this case, the finish
1263 will carry them entirely through the vfork & exec.
1265 We don't want to allow a bp_finish to remain inserted now. But
1266 we can't safely delete it, 'cause finish_command has a handle to
1267 the bp on a bpstat, and will later want to delete it. There's a
1268 chance (and I've seen it happen) that if we delete the bp_finish
1269 here, that its storage will get reused by the time finish_command
1270 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1271 We really must allow finish_command to delete a bp_finish.
1273 In the absense of a general solution for the "how do we know
1274 it's safe to delete something others may have handles to?"
1275 problem, what we'll do here is just uninsert the bp_finish, and
1276 let finish_command delete it.
1278 (We know the bp_finish is "doomed" in the sense that it's
1279 momentary, and will be deleted as soon as finish_command sees
1280 the inferior stopped. So it doesn't matter that the bp's
1281 address is probably bogus in the new a.out, unlike e.g., the
1282 solib breakpoints.) */
1284 if (b
->type
== bp_finish
)
1289 /* Without a symbolic address, we have little hope of the
1290 pre-exec() address meaning the same thing in the post-exec()
1292 if (b
->addr_string
== NULL
)
1294 delete_breakpoint (b
);
1298 /* If this breakpoint has survived the above battery of checks, then
1299 it must have a symbolic address. Be sure that it gets reevaluated
1300 to a target address, rather than reusing the old evaluation.
1302 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1303 for bp_catch_exec and friends, I'm pretty sure this is entirely
1304 unnecessary. A call to breakpoint_re_set_one always recomputes
1305 the breakpoint's address from scratch, or deletes it if it can't.
1306 So I think this assignment could be deleted without effect. */
1307 b
->address
= (CORE_ADDR
) NULL
;
1309 /* FIXME what about longjmp breakpoints? Re-create them here? */
1310 create_overlay_event_breakpoint ("_ovly_debug_event");
1314 detach_breakpoints (int pid
)
1316 register struct breakpoint
*b
;
1318 struct cleanup
*old_chain
= save_inferior_ptid ();
1320 if (pid
== PIDGET (inferior_ptid
))
1321 error ("Cannot detach breakpoints of inferior_ptid");
1323 /* Set inferior_ptid; remove_breakpoint uses this global. */
1324 inferior_ptid
= pid_to_ptid (pid
);
1329 val
= remove_breakpoint (b
, mark_inserted
);
1332 do_cleanups (old_chain
);
1337 do_cleanups (old_chain
);
1342 remove_breakpoint (struct breakpoint
*b
, insertion_state_t is
)
1346 if (b
->enable_state
== bp_permanent
)
1347 /* Permanent breakpoints cannot be inserted or removed. */
1350 if (b
->type
== bp_none
)
1351 warning ("attempted to remove apparently deleted breakpoint #%d?",
1354 if (b
->type
!= bp_watchpoint
1355 && b
->type
!= bp_hardware_watchpoint
1356 && b
->type
!= bp_read_watchpoint
1357 && b
->type
!= bp_access_watchpoint
1358 && b
->type
!= bp_catch_fork
1359 && b
->type
!= bp_catch_vfork
1360 && b
->type
!= bp_catch_exec
1361 && b
->type
!= bp_catch_catch
1362 && b
->type
!= bp_catch_throw
)
1364 /* "Normal" instruction breakpoint: either the standard
1365 trap-instruction bp (bp_breakpoint), or a
1366 bp_hardware_breakpoint. */
1368 /* First check to see if we have to handle an overlay. */
1369 if (overlay_debugging
== ovly_off
1370 || b
->section
== NULL
1371 || !(section_is_overlay (b
->section
)))
1373 /* No overlay handling: just remove the breakpoint. */
1375 if (b
->type
== bp_hardware_breakpoint
)
1376 val
= target_remove_hw_breakpoint (b
->address
,
1377 b
->shadow_contents
);
1379 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1383 /* This breakpoint is in an overlay section.
1384 Did we set a breakpoint at the LMA? */
1385 if (!overlay_events_enabled
)
1387 /* Yes -- overlay event support is not active, so we
1388 should have set a breakpoint at the LMA. Remove it.
1390 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1392 /* Ignore any failures: if the LMA is in ROM, we will
1393 have already warned when we failed to insert it. */
1394 if (b
->type
!= bp_hardware_breakpoint
)
1395 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1397 target_remove_breakpoint (addr
, b
->shadow_contents
);
1399 /* Did we set a breakpoint at the VMA?
1400 If so, we will have marked the breakpoint 'inserted'. */
1403 /* Yes -- remove it. Previously we did not bother to
1404 remove the breakpoint if the section had been
1405 unmapped, but let's not rely on that being safe. We
1406 don't know what the overlay manager might do. */
1407 if (b
->type
== bp_hardware_breakpoint
)
1408 val
= target_remove_hw_breakpoint (b
->address
,
1409 b
->shadow_contents
);
1411 val
= target_remove_breakpoint (b
->address
,
1412 b
->shadow_contents
);
1416 /* No -- not inserted, so no need to remove. No error. */
1422 b
->inserted
= (is
== mark_inserted
);
1424 else if ((b
->type
== bp_hardware_watchpoint
||
1425 b
->type
== bp_read_watchpoint
||
1426 b
->type
== bp_access_watchpoint
)
1427 && b
->enable_state
== bp_enabled
1433 b
->inserted
= (is
== mark_inserted
);
1434 /* Walk down the saved value chain. */
1435 for (v
= b
->val_chain
; v
; v
= v
->next
)
1437 /* For each memory reference remove the watchpoint
1439 if (VALUE_LVAL (v
) == lval_memory
1440 && ! VALUE_LAZY (v
))
1442 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
1444 if (v
== b
->val_chain
1445 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1446 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1451 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1452 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1454 if (b
->type
== bp_read_watchpoint
)
1456 else if (b
->type
== bp_access_watchpoint
)
1459 val
= target_remove_watchpoint (addr
, len
, type
);
1466 /* Failure to remove any of the hardware watchpoints comes here. */
1467 if ((is
== mark_uninserted
) && (b
->inserted
))
1468 warning ("Could not remove hardware watchpoint %d.",
1471 /* Free the saved value chain. We will construct a new one
1472 the next time the watchpoint is inserted. */
1473 for (v
= b
->val_chain
; v
; v
= n
)
1478 b
->val_chain
= NULL
;
1480 else if ((b
->type
== bp_catch_fork
||
1481 b
->type
== bp_catch_vfork
||
1482 b
->type
== bp_catch_exec
)
1483 && b
->enable_state
== bp_enabled
1490 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1492 case bp_catch_vfork
:
1493 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1496 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1499 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1504 b
->inserted
= (is
== mark_inserted
);
1506 else if ((b
->type
== bp_catch_catch
||
1507 b
->type
== bp_catch_throw
)
1508 && b
->enable_state
== bp_enabled
1512 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1515 b
->inserted
= (is
== mark_inserted
);
1517 else if (ep_is_exception_catchpoint (b
)
1518 && b
->inserted
/* sometimes previous insert doesn't happen */
1519 && b
->enable_state
== bp_enabled
1523 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1527 b
->inserted
= (is
== mark_inserted
);
1533 /* Clear the "inserted" flag in all breakpoints. */
1536 mark_breakpoints_out (void)
1538 register struct breakpoint
*b
;
1544 /* Clear the "inserted" flag in all breakpoints and delete any
1545 breakpoints which should go away between runs of the program.
1547 Plus other such housekeeping that has to be done for breakpoints
1550 Note: this function gets called at the end of a run (by
1551 generic_mourn_inferior) and when a run begins (by
1552 init_wait_for_inferior). */
1557 breakpoint_init_inferior (enum inf_context context
)
1559 register struct breakpoint
*b
, *temp
;
1560 static int warning_needed
= 0;
1562 ALL_BREAKPOINTS_SAFE (b
, temp
)
1569 case bp_watchpoint_scope
:
1571 /* If the call dummy breakpoint is at the entry point it will
1572 cause problems when the inferior is rerun, so we better
1575 Also get rid of scope breakpoints. */
1576 delete_breakpoint (b
);
1580 case bp_hardware_watchpoint
:
1581 case bp_read_watchpoint
:
1582 case bp_access_watchpoint
:
1584 /* Likewise for watchpoints on local expressions. */
1585 if (b
->exp_valid_block
!= NULL
)
1586 delete_breakpoint (b
);
1587 if (context
== inf_starting
)
1589 /* Reset val field to force reread of starting value
1590 in insert_breakpoints. */
1592 value_free (b
->val
);
1597 /* Likewise for exception catchpoints in dynamic-linked
1598 executables where required */
1599 if (ep_is_exception_catchpoint (b
) &&
1600 exception_catchpoints_are_fragile
)
1603 delete_breakpoint (b
);
1609 if (exception_catchpoints_are_fragile
)
1610 exception_support_initialized
= 0;
1612 /* Don't issue the warning unless it's really needed... */
1613 if (warning_needed
&& (context
!= inf_exited
))
1615 warning ("Exception catchpoints from last run were deleted.");
1616 warning ("You must reinsert them explicitly.");
1621 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1622 exists at PC. It returns ordinary_breakpoint_here if it's an
1623 ordinary breakpoint, or permanent_breakpoint_here if it's a
1624 permanent breakpoint.
1625 - When continuing from a location with an ordinary breakpoint, we
1626 actually single step once before calling insert_breakpoints.
1627 - When continuing from a localion with a permanent breakpoint, we
1628 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1629 the target, to advance the PC past the breakpoint. */
1631 enum breakpoint_here
1632 breakpoint_here_p (CORE_ADDR pc
)
1634 register struct breakpoint
*b
;
1635 int any_breakpoint_here
= 0;
1638 if ((b
->enable_state
== bp_enabled
1639 || b
->enable_state
== bp_permanent
)
1640 && b
->address
== pc
) /* bp is enabled and matches pc */
1642 if (overlay_debugging
1643 && section_is_overlay (b
->section
)
1644 && !section_is_mapped (b
->section
))
1645 continue; /* unmapped overlay -- can't be a match */
1646 else if (b
->enable_state
== bp_permanent
)
1647 return permanent_breakpoint_here
;
1649 any_breakpoint_here
= 1;
1652 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1656 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1657 but it only returns true if there is actually a breakpoint inserted
1661 breakpoint_inserted_here_p (CORE_ADDR pc
)
1663 register struct breakpoint
*b
;
1667 && b
->address
== pc
) /* bp is inserted and matches pc */
1669 if (overlay_debugging
1670 && section_is_overlay (b
->section
)
1671 && !section_is_mapped (b
->section
))
1672 continue; /* unmapped overlay -- can't be a match */
1680 /* Return nonzero if FRAME is a dummy frame. We can't use
1681 DEPRECATED_PC_IN_CALL_DUMMY because figuring out the saved SP would
1682 take too much time, at least using get_saved_register on the 68k.
1683 This means that for this function to work right a port must use the
1684 bp_call_dummy breakpoint. */
1687 deprecated_frame_in_dummy (struct frame_info
*frame
)
1689 struct breakpoint
*b
;
1694 /* This function is used by two files: get_frame_type(), after first
1695 checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and
1696 sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */
1697 gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES
);
1701 if (b
->type
== bp_call_dummy
1702 && frame_id_eq (b
->frame_id
, get_frame_id (frame
))
1703 /* We need to check the PC as well as the frame on the sparc,
1704 for signals.exp in the testsuite. */
1705 && (get_frame_pc (frame
)
1707 - SIZEOF_CALL_DUMMY_WORDS
/ sizeof (LONGEST
) * REGISTER_SIZE
))
1708 && get_frame_pc (frame
) <= b
->address
)
1714 /* breakpoint_thread_match (PC, PID) returns true if the breakpoint at
1715 PC is valid for process/thread PID. */
1718 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1720 struct breakpoint
*b
;
1723 thread
= pid_to_thread_id (ptid
);
1726 if (b
->enable_state
!= bp_disabled
1727 && b
->enable_state
!= bp_shlib_disabled
1728 && b
->enable_state
!= bp_call_disabled
1730 && (b
->thread
== -1 || b
->thread
== thread
))
1732 if (overlay_debugging
1733 && section_is_overlay (b
->section
)
1734 && !section_is_mapped (b
->section
))
1735 continue; /* unmapped overlay -- can't be a match */
1744 /* bpstat stuff. External routines' interfaces are documented
1748 ep_is_catchpoint (struct breakpoint
*ep
)
1751 (ep
->type
== bp_catch_load
)
1752 || (ep
->type
== bp_catch_unload
)
1753 || (ep
->type
== bp_catch_fork
)
1754 || (ep
->type
== bp_catch_vfork
)
1755 || (ep
->type
== bp_catch_exec
)
1756 || (ep
->type
== bp_catch_catch
)
1757 || (ep
->type
== bp_catch_throw
);
1759 /* ??rehrauer: Add more kinds here, as are implemented... */
1763 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1766 (ep
->type
== bp_catch_load
)
1767 || (ep
->type
== bp_catch_unload
);
1771 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1774 (ep
->type
== bp_catch_catch
)
1775 || (ep
->type
== bp_catch_throw
);
1778 /* Clear a bpstat so that it says we are not at any breakpoint.
1779 Also free any storage that is part of a bpstat. */
1782 bpstat_clear (bpstat
*bsp
)
1793 if (p
->old_val
!= NULL
)
1794 value_free (p
->old_val
);
1795 free_command_lines (&p
->commands
);
1802 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1803 is part of the bpstat is copied as well. */
1806 bpstat_copy (bpstat bs
)
1810 bpstat retval
= NULL
;
1815 for (; bs
!= NULL
; bs
= bs
->next
)
1817 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1818 memcpy (tmp
, bs
, sizeof (*tmp
));
1819 if (bs
->commands
!= NULL
)
1820 tmp
->commands
= copy_command_lines (bs
->commands
);
1821 if (bs
->old_val
!= NULL
)
1822 tmp
->old_val
= value_copy (bs
->old_val
);
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 (void *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
, *ui_out_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_chain
= make_cleanup_ui_out_tuple_begin_end (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 do_cleanups (ui_out_chain
);
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_chain
= make_cleanup_ui_out_tuple_begin_end (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 do_cleanups (ui_out_chain
);
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_chain
= make_cleanup_ui_out_tuple_begin_end (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_chain
= make_cleanup_ui_out_tuple_begin_end (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 do_cleanups (ui_out_chain
);
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 (void *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 (void *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;
2730 if (frame_id_p (b
->frame_id
)
2731 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_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
;
2768 bs
->commands
= b
->commands
;
2770 (STREQ ("silent", bs
->commands
->line
) ||
2771 (xdb_commands
&& STREQ ("Q", bs
->commands
->line
))))
2773 bs
->commands
= bs
->commands
->next
;
2776 bs
->commands
= copy_command_lines (bs
->commands
);
2779 /* Print nothing for this entry if we dont stop or if we dont print. */
2780 if (bs
->stop
== 0 || bs
->print
== 0)
2781 bs
->print_it
= print_it_noop
;
2784 bs
->next
= NULL
; /* Terminate the chain */
2785 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2787 if (real_breakpoint
&& bs
)
2789 if (bs
->breakpoint_at
->type
== bp_hardware_breakpoint
)
2791 if (DECR_PC_AFTER_HW_BREAK
!= 0)
2793 *pc
= *pc
- DECR_PC_AFTER_HW_BREAK
;
2799 if (DECR_PC_AFTER_BREAK
!= 0 || must_shift_inst_regs
)
2802 #if defined (SHIFT_INST_REGS)
2804 #else /* No SHIFT_INST_REGS. */
2806 #endif /* No SHIFT_INST_REGS. */
2811 /* The value of a hardware watchpoint hasn't changed, but the
2812 intermediate memory locations we are watching may have. */
2813 if (bs
&& !bs
->stop
&&
2814 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2815 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2816 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2818 remove_breakpoints ();
2819 insert_breakpoints ();
2824 /* Tell what to do about this bpstat. */
2826 bpstat_what (bpstat bs
)
2828 /* Classify each bpstat as one of the following. */
2831 /* This bpstat element has no effect on the main_action. */
2834 /* There was a watchpoint, stop but don't print. */
2837 /* There was a watchpoint, stop and print. */
2840 /* There was a breakpoint but we're not stopping. */
2843 /* There was a breakpoint, stop but don't print. */
2846 /* There was a breakpoint, stop and print. */
2849 /* We hit the longjmp breakpoint. */
2852 /* We hit the longjmp_resume breakpoint. */
2855 /* We hit the step_resume breakpoint. */
2858 /* We hit the through_sigtramp breakpoint. */
2861 /* We hit the shared library event breakpoint. */
2864 /* We caught a shared library event. */
2867 /* This is just used to count how many enums there are. */
2871 /* Here is the table which drives this routine. So that we can
2872 format it pretty, we define some abbreviations for the
2873 enum bpstat_what codes. */
2874 #define kc BPSTAT_WHAT_KEEP_CHECKING
2875 #define ss BPSTAT_WHAT_STOP_SILENT
2876 #define sn BPSTAT_WHAT_STOP_NOISY
2877 #define sgl BPSTAT_WHAT_SINGLE
2878 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2879 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2880 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2881 #define sr BPSTAT_WHAT_STEP_RESUME
2882 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2883 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2884 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2886 /* "Can't happen." Might want to print an error message.
2887 abort() is not out of the question, but chances are GDB is just
2888 a bit confused, not unusable. */
2889 #define err BPSTAT_WHAT_STOP_NOISY
2891 /* Given an old action and a class, come up with a new action. */
2892 /* One interesting property of this table is that wp_silent is the same
2893 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2894 after stopping, the check for whether to step over a breakpoint
2895 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2896 reference to how we stopped. We retain separate wp_silent and
2897 bp_silent codes in case we want to change that someday.
2899 Another possibly interesting property of this table is that
2900 there's a partial ordering, priority-like, of the actions. Once
2901 you've decided that some action is appropriate, you'll never go
2902 back and decide something of a lower priority is better. The
2905 kc < clr sgl shl shlr slr sn sr ss ts
2906 sgl < clrs shl shlr slr sn sr ss ts
2907 slr < err shl shlr sn sr ss ts
2908 clr < clrs err shl shlr sn sr ss ts
2909 clrs < err shl shlr sn sr ss ts
2910 ss < shl shlr sn sr ts
2917 What I think this means is that we don't need a damned table
2918 here. If you just put the rows and columns in the right order,
2919 it'd look awfully regular. We could simply walk the bpstat list
2920 and choose the highest priority action we find, with a little
2921 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2922 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2923 is messy anyway). */
2925 /* step_resume entries: a step resume breakpoint overrides another
2926 breakpoint of signal handling (see comment in wait_for_inferior
2927 at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
2928 /* We handle the through_sigtramp_breakpoint the same way; having both
2929 one of those and a step_resume_breakpoint is probably very rare (?). */
2931 static const enum bpstat_what_main_action
2932 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
2935 /* kc ss sn sgl slr clr clrs sr ts shl shlr
2938 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
2940 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
2942 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
2944 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
2946 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
2948 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
2950 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
2952 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
2954 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
2956 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
2958 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
2960 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
2975 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
2976 struct bpstat_what retval
;
2978 retval
.call_dummy
= 0;
2979 for (; bs
!= NULL
; bs
= bs
->next
)
2981 enum class bs_class
= no_effect
;
2982 if (bs
->breakpoint_at
== NULL
)
2983 /* I suspect this can happen if it was a momentary breakpoint
2984 which has since been deleted. */
2986 switch (bs
->breakpoint_at
->type
)
2992 case bp_hardware_breakpoint
:
2998 bs_class
= bp_noisy
;
3000 bs_class
= bp_silent
;
3003 bs_class
= bp_nostop
;
3006 case bp_hardware_watchpoint
:
3007 case bp_read_watchpoint
:
3008 case bp_access_watchpoint
:
3012 bs_class
= wp_noisy
;
3014 bs_class
= wp_silent
;
3017 /* There was a watchpoint, but we're not stopping.
3018 This requires no further action. */
3019 bs_class
= no_effect
;
3022 bs_class
= long_jump
;
3024 case bp_longjmp_resume
:
3025 bs_class
= long_resume
;
3027 case bp_step_resume
:
3030 bs_class
= step_resume
;
3033 /* It is for the wrong frame. */
3034 bs_class
= bp_nostop
;
3036 case bp_through_sigtramp
:
3037 bs_class
= through_sig
;
3039 case bp_watchpoint_scope
:
3040 bs_class
= bp_nostop
;
3042 case bp_shlib_event
:
3043 bs_class
= shlib_event
;
3045 case bp_thread_event
:
3046 case bp_overlay_event
:
3047 bs_class
= bp_nostop
;
3050 case bp_catch_unload
:
3051 /* Only if this catchpoint triggered should we cause the
3052 step-out-of-dld behaviour. Otherwise, we ignore this
3055 bs_class
= catch_shlib_event
;
3057 bs_class
= no_effect
;
3060 case bp_catch_vfork
:
3065 bs_class
= bp_noisy
;
3067 bs_class
= bp_silent
;
3070 /* There was a catchpoint, but we're not stopping.
3071 This requires no further action. */
3072 bs_class
= no_effect
;
3074 case bp_catch_catch
:
3075 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3076 bs_class
= bp_nostop
;
3078 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3080 case bp_catch_throw
:
3081 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3082 bs_class
= bp_nostop
;
3084 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3087 /* Make sure the action is stop (silent or noisy),
3088 so infrun.c pops the dummy frame. */
3089 bs_class
= bp_silent
;
3090 retval
.call_dummy
= 1;
3093 current_action
= table
[(int) bs_class
][(int) current_action
];
3095 retval
.main_action
= current_action
;
3099 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3100 without hardware support). This isn't related to a specific bpstat,
3101 just to things like whether watchpoints are set. */
3104 bpstat_should_step (void)
3106 struct breakpoint
*b
;
3108 if (b
->enable_state
== bp_enabled
&& b
->type
== bp_watchpoint
)
3113 /* Nonzero if there are enabled hardware watchpoints. */
3115 bpstat_have_active_hw_watchpoints (void)
3117 struct breakpoint
*b
;
3119 if ((b
->enable_state
== bp_enabled
) &&
3121 ((b
->type
== bp_hardware_watchpoint
) ||
3122 (b
->type
== bp_read_watchpoint
) ||
3123 (b
->type
== bp_access_watchpoint
)))
3129 /* Given a bpstat that records zero or more triggered eventpoints, this
3130 function returns another bpstat which contains only the catchpoints
3131 on that first list, if any. */
3133 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3135 struct bpstats root_bs
[1];
3136 bpstat bs
= root_bs
;
3137 struct breakpoint
*ep
;
3140 bpstat_clear (cp_list
);
3141 root_bs
->next
= NULL
;
3143 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3145 /* Is this eventpoint a catchpoint? If not, ignore it. */
3146 ep
= ep_list
->breakpoint_at
;
3149 if ((ep
->type
!= bp_catch_load
) &&
3150 (ep
->type
!= bp_catch_unload
) &&
3151 (ep
->type
!= bp_catch_catch
) &&
3152 (ep
->type
!= bp_catch_throw
))
3153 /* pai: (temp) ADD fork/vfork here!! */
3156 /* Yes; add it to the list. */
3157 bs
= bpstat_alloc (ep
, bs
);
3162 #if defined(SOLIB_ADD)
3163 /* Also, for each triggered catchpoint, tag it with the name of
3164 the library that caused this trigger. (We copy the name now,
3165 because it's only guaranteed to be available NOW, when the
3166 catchpoint triggers. Clients who may wish to know the name
3167 later must get it from the catchpoint itself.) */
3168 if (ep
->triggered_dll_pathname
!= NULL
)
3169 xfree (ep
->triggered_dll_pathname
);
3170 if (ep
->type
== bp_catch_load
)
3171 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3172 PIDGET (inferior_ptid
));
3174 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3175 PIDGET (inferior_ptid
));
3177 dll_pathname
= NULL
;
3181 ep
->triggered_dll_pathname
= (char *)
3182 xmalloc (strlen (dll_pathname
) + 1);
3183 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3186 ep
->triggered_dll_pathname
= NULL
;
3192 /* Print B to gdb_stdout. */
3194 print_one_breakpoint (struct breakpoint
*b
,
3195 CORE_ADDR
*last_addr
)
3197 register struct command_line
*l
;
3198 register struct symbol
*sym
;
3199 struct ep_type_description
3204 static struct ep_type_description bptypes
[] =
3206 {bp_none
, "?deleted?"},
3207 {bp_breakpoint
, "breakpoint"},
3208 {bp_hardware_breakpoint
, "hw breakpoint"},
3209 {bp_until
, "until"},
3210 {bp_finish
, "finish"},
3211 {bp_watchpoint
, "watchpoint"},
3212 {bp_hardware_watchpoint
, "hw watchpoint"},
3213 {bp_read_watchpoint
, "read watchpoint"},
3214 {bp_access_watchpoint
, "acc watchpoint"},
3215 {bp_longjmp
, "longjmp"},
3216 {bp_longjmp_resume
, "longjmp resume"},
3217 {bp_step_resume
, "step resume"},
3218 {bp_through_sigtramp
, "sigtramp"},
3219 {bp_watchpoint_scope
, "watchpoint scope"},
3220 {bp_call_dummy
, "call dummy"},
3221 {bp_shlib_event
, "shlib events"},
3222 {bp_thread_event
, "thread events"},
3223 {bp_overlay_event
, "overlay events"},
3224 {bp_catch_load
, "catch load"},
3225 {bp_catch_unload
, "catch unload"},
3226 {bp_catch_fork
, "catch fork"},
3227 {bp_catch_vfork
, "catch vfork"},
3228 {bp_catch_exec
, "catch exec"},
3229 {bp_catch_catch
, "catch catch"},
3230 {bp_catch_throw
, "catch throw"}
3233 static char *bpdisps
[] =
3234 {"del", "dstp", "dis", "keep"};
3235 static char bpenables
[] = "nynny";
3236 char wrap_indent
[80];
3237 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3238 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3239 struct cleanup
*bkpt_chain
;
3242 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3246 ui_out_field_int (uiout
, "number", b
->number
);
3250 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3251 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3252 internal_error (__FILE__
, __LINE__
,
3253 "bptypes table does not describe type #%d.",
3255 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3259 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3263 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3264 ui_out_spaces (uiout
, 2);
3267 strcpy (wrap_indent
, " ");
3270 if (TARGET_ADDR_BIT
<= 32)
3271 strcat (wrap_indent
, " ");
3273 strcat (wrap_indent
, " ");
3278 internal_error (__FILE__
, __LINE__
,
3279 "print_one_breakpoint: bp_none encountered\n");
3283 case bp_hardware_watchpoint
:
3284 case bp_read_watchpoint
:
3285 case bp_access_watchpoint
:
3286 /* Field 4, the address, is omitted (which makes the columns
3287 not line up too nicely with the headers, but the effect
3288 is relatively readable). */
3290 ui_out_field_skip (uiout
, "addr");
3292 print_expression (b
->exp
, stb
->stream
);
3293 ui_out_field_stream (uiout
, "what", stb
);
3297 case bp_catch_unload
:
3298 /* Field 4, the address, is omitted (which makes the columns
3299 not line up too nicely with the headers, but the effect
3300 is relatively readable). */
3302 ui_out_field_skip (uiout
, "addr");
3304 if (b
->dll_pathname
== NULL
)
3306 ui_out_field_string (uiout
, "what", "<any library>");
3307 ui_out_spaces (uiout
, 1);
3311 ui_out_text (uiout
, "library \"");
3312 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3313 ui_out_text (uiout
, "\" ");
3318 case bp_catch_vfork
:
3319 /* Field 4, the address, is omitted (which makes the columns
3320 not line up too nicely with the headers, but the effect
3321 is relatively readable). */
3323 ui_out_field_skip (uiout
, "addr");
3325 if (b
->forked_inferior_pid
!= 0)
3327 ui_out_text (uiout
, "process ");
3328 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3329 ui_out_spaces (uiout
, 1);
3333 /* Field 4, the address, is omitted (which makes the columns
3334 not line up too nicely with the headers, but the effect
3335 is relatively readable). */
3337 ui_out_field_skip (uiout
, "addr");
3339 if (b
->exec_pathname
!= NULL
)
3341 ui_out_text (uiout
, "program \"");
3342 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3343 ui_out_text (uiout
, "\" ");
3347 case bp_catch_catch
:
3348 /* Field 4, the address, is omitted (which makes the columns
3349 not line up too nicely with the headers, but the effect
3350 is relatively readable). */
3352 ui_out_field_skip (uiout
, "addr");
3354 ui_out_field_string (uiout
, "what", "exception catch");
3355 ui_out_spaces (uiout
, 1);
3358 case bp_catch_throw
:
3359 /* Field 4, the address, is omitted (which makes the columns
3360 not line up too nicely with the headers, but the effect
3361 is relatively readable). */
3363 ui_out_field_skip (uiout
, "addr");
3365 ui_out_field_string (uiout
, "what", "exception throw");
3366 ui_out_spaces (uiout
, 1);
3370 case bp_hardware_breakpoint
:
3374 case bp_longjmp_resume
:
3375 case bp_step_resume
:
3376 case bp_through_sigtramp
:
3377 case bp_watchpoint_scope
:
3379 case bp_shlib_event
:
3380 case bp_thread_event
:
3381 case bp_overlay_event
:
3385 ui_out_field_core_addr (uiout
, "addr", b
->address
);
3388 *last_addr
= b
->address
;
3391 sym
= find_pc_sect_function (b
->address
, b
->section
);
3394 ui_out_text (uiout
, "in ");
3395 ui_out_field_string (uiout
, "func",
3396 SYMBOL_PRINT_NAME (sym
));
3397 ui_out_wrap_hint (uiout
, wrap_indent
);
3398 ui_out_text (uiout
, " at ");
3400 ui_out_field_string (uiout
, "file", b
->source_file
);
3401 ui_out_text (uiout
, ":");
3402 ui_out_field_int (uiout
, "line", b
->line_number
);
3406 print_address_symbolic (b
->address
, stb
->stream
, demangle
, "");
3407 ui_out_field_stream (uiout
, "at", stb
);
3412 if (b
->thread
!= -1)
3414 /* FIXME: This seems to be redundant and lost here; see the
3415 "stop only in" line a little further down. */
3416 ui_out_text (uiout
, " thread ");
3417 ui_out_field_int (uiout
, "thread", b
->thread
);
3420 ui_out_text (uiout
, "\n");
3422 if (frame_id_p (b
->frame_id
))
3425 ui_out_text (uiout
, "\tstop only in stack frame at ");
3426 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3428 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.base
);
3429 ui_out_text (uiout
, "\n");
3435 ui_out_text (uiout
, "\tstop only if ");
3436 print_expression (b
->cond
, stb
->stream
);
3437 ui_out_field_stream (uiout
, "cond", stb
);
3438 ui_out_text (uiout
, "\n");
3441 if (b
->thread
!= -1)
3443 /* FIXME should make an annotation for this */
3444 ui_out_text (uiout
, "\tstop only in thread ");
3445 ui_out_field_int (uiout
, "thread", b
->thread
);
3446 ui_out_text (uiout
, "\n");
3449 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3451 /* FIXME should make an annotation for this */
3452 if (ep_is_catchpoint (b
))
3453 ui_out_text (uiout
, "\tcatchpoint");
3455 ui_out_text (uiout
, "\tbreakpoint");
3456 ui_out_text (uiout
, " already hit ");
3457 ui_out_field_int (uiout
, "times", b
->hit_count
);
3458 if (b
->hit_count
== 1)
3459 ui_out_text (uiout
, " time\n");
3461 ui_out_text (uiout
, " times\n");
3464 /* Output the count also if it is zero, but only if this is
3465 mi. FIXME: Should have a better test for this. */
3466 if (ui_out_is_mi_like_p (uiout
))
3467 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3468 ui_out_field_int (uiout
, "times", b
->hit_count
);
3470 if (b
->ignore_count
)
3473 ui_out_text (uiout
, "\tignore next ");
3474 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3475 ui_out_text (uiout
, " hits\n");
3478 if ((l
= b
->commands
))
3480 struct cleanup
*script_chain
;
3483 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3484 print_command_lines (uiout
, l
, 4);
3485 do_cleanups (script_chain
);
3487 do_cleanups (bkpt_chain
);
3488 do_cleanups (old_chain
);
3491 struct captured_breakpoint_query_args
3497 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3499 struct captured_breakpoint_query_args
*args
= data
;
3500 register struct breakpoint
*b
;
3501 CORE_ADDR dummy_addr
= 0;
3504 if (args
->bnum
== b
->number
)
3506 print_one_breakpoint (b
, &dummy_addr
);
3514 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
)
3516 struct captured_breakpoint_query_args args
;
3518 /* For the moment we don't trust print_one_breakpoint() to not throw
3520 return catch_exceptions (uiout
, do_captured_breakpoint_query
, &args
,
3521 NULL
, RETURN_MASK_ALL
);
3524 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3525 catchpoints, et.al.). */
3528 user_settable_breakpoint (const struct breakpoint
*b
)
3530 return (b
->type
== bp_breakpoint
3531 || b
->type
== bp_catch_load
3532 || b
->type
== bp_catch_unload
3533 || b
->type
== bp_catch_fork
3534 || b
->type
== bp_catch_vfork
3535 || b
->type
== bp_catch_exec
3536 || b
->type
== bp_catch_catch
3537 || b
->type
== bp_catch_throw
3538 || b
->type
== bp_hardware_breakpoint
3539 || b
->type
== bp_watchpoint
3540 || b
->type
== bp_read_watchpoint
3541 || b
->type
== bp_access_watchpoint
3542 || b
->type
== bp_hardware_watchpoint
);
3545 /* Print information on user settable breakpoint (watchpoint, etc)
3546 number BNUM. If BNUM is -1 print all user settable breakpoints.
3547 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3550 breakpoint_1 (int bnum
, int allflag
)
3552 register struct breakpoint
*b
;
3553 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3554 int nr_printable_breakpoints
;
3555 struct cleanup
*bkpttbl_chain
;
3557 /* Compute the number of rows in the table. */
3558 nr_printable_breakpoints
= 0;
3561 || bnum
== b
->number
)
3563 if (allflag
|| user_settable_breakpoint (b
))
3564 nr_printable_breakpoints
++;
3569 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3573 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3576 if (nr_printable_breakpoints
> 0)
3577 annotate_breakpoints_headers ();
3578 if (nr_printable_breakpoints
> 0)
3580 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3581 if (nr_printable_breakpoints
> 0)
3583 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3584 if (nr_printable_breakpoints
> 0)
3586 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3587 if (nr_printable_breakpoints
> 0)
3589 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3592 if (nr_printable_breakpoints
> 0)
3594 if (TARGET_ADDR_BIT
<= 32)
3595 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3597 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3599 if (nr_printable_breakpoints
> 0)
3601 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3602 ui_out_table_body (uiout
);
3603 if (nr_printable_breakpoints
> 0)
3604 annotate_breakpoints_table ();
3608 || bnum
== b
->number
)
3610 /* We only print out user settable breakpoints unless the
3612 if (allflag
|| user_settable_breakpoint (b
))
3613 print_one_breakpoint (b
, &last_addr
);
3616 do_cleanups (bkpttbl_chain
);
3618 if (nr_printable_breakpoints
== 0)
3621 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3623 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3628 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3629 that a comparison of an unsigned with -1 is always false. */
3630 if (last_addr
!= (CORE_ADDR
) -1)
3631 set_next_address (last_addr
);
3634 /* FIXME? Should this be moved up so that it is only called when
3635 there have been breakpoints? */
3636 annotate_breakpoints_table_end ();
3641 breakpoints_info (char *bnum_exp
, int from_tty
)
3646 bnum
= parse_and_eval_long (bnum_exp
);
3648 breakpoint_1 (bnum
, 0);
3653 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3658 bnum
= parse_and_eval_long (bnum_exp
);
3660 breakpoint_1 (bnum
, 1);
3663 /* Print a message describing any breakpoints set at PC. */
3666 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3668 register int others
= 0;
3669 register struct breakpoint
*b
;
3672 if (b
->address
== pc
) /* address match / overlay match */
3673 if (!overlay_debugging
|| b
->section
== section
)
3677 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3679 if (b
->address
== pc
) /* address match / overlay match */
3680 if (!overlay_debugging
|| b
->section
== section
)
3683 printf_filtered ("%d%s%s ",
3685 ((b
->enable_state
== bp_disabled
||
3686 b
->enable_state
== bp_shlib_disabled
||
3687 b
->enable_state
== bp_call_disabled
)
3689 : b
->enable_state
== bp_permanent
3693 : ((others
== 1) ? " and" : ""));
3695 printf_filtered ("also set at pc ");
3696 print_address_numeric (pc
, 1, gdb_stdout
);
3697 printf_filtered (".\n");
3701 /* Set the default place to put a breakpoint
3702 for the `break' command with no arguments. */
3705 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3708 default_breakpoint_valid
= valid
;
3709 default_breakpoint_address
= addr
;
3710 default_breakpoint_symtab
= symtab
;
3711 default_breakpoint_line
= line
;
3714 /* Return true iff it is meaningful to use the address member of
3715 BPT. For some breakpoint types, the address member is irrelevant
3716 and it makes no sense to attempt to compare it to other addresses
3717 (or use it for any other purpose either).
3719 More specifically, each of the following breakpoint types will always
3720 have a zero valued address and we don't want check_duplicates() to mark
3721 breakpoints of any of these types to be a duplicate of an actual
3722 breakpoint at address zero:
3725 bp_hardware_watchpoint
3727 bp_access_watchpoint
3734 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3736 enum bptype type
= bpt
->type
;
3738 return (type
!= bp_watchpoint
3739 && type
!= bp_hardware_watchpoint
3740 && type
!= bp_read_watchpoint
3741 && type
!= bp_access_watchpoint
3742 && type
!= bp_catch_exec
3743 && type
!= bp_longjmp_resume
3744 && type
!= bp_catch_fork
3745 && type
!= bp_catch_vfork
);
3748 /* Rescan breakpoints at the same address and section as BPT,
3749 marking the first one as "first" and any others as "duplicates".
3750 This is so that the bpt instruction is only inserted once.
3751 If we have a permanent breakpoint at the same place as BPT, make
3752 that one the official one, and the rest as duplicates. */
3755 check_duplicates (struct breakpoint
*bpt
)
3757 register struct breakpoint
*b
;
3758 register int count
= 0;
3759 struct breakpoint
*perm_bp
= 0;
3760 CORE_ADDR address
= bpt
->address
;
3761 asection
*section
= bpt
->section
;
3763 if (! breakpoint_address_is_meaningful (bpt
))
3767 if (b
->enable_state
!= bp_disabled
3768 && b
->enable_state
!= bp_shlib_disabled
3769 && b
->enable_state
!= bp_call_disabled
3770 && b
->address
== address
/* address / overlay match */
3771 && (!overlay_debugging
|| b
->section
== section
)
3772 && breakpoint_address_is_meaningful (b
))
3774 /* Have we found a permanent breakpoint? */
3775 if (b
->enable_state
== bp_permanent
)
3782 b
->duplicate
= count
> 1;
3785 /* If we found a permanent breakpoint at this address, go over the
3786 list again and declare all the other breakpoints there to be the
3790 perm_bp
->duplicate
= 0;
3792 /* Permanent breakpoint should always be inserted. */
3793 if (! perm_bp
->inserted
)
3794 internal_error (__FILE__
, __LINE__
,
3795 "allegedly permanent breakpoint is not "
3796 "actually inserted");
3802 internal_error (__FILE__
, __LINE__
,
3803 "another breakpoint was inserted on top of "
3804 "a permanent breakpoint");
3806 if (b
->enable_state
!= bp_disabled
3807 && b
->enable_state
!= bp_shlib_disabled
3808 && b
->enable_state
!= bp_call_disabled
3809 && b
->address
== address
/* address / overlay match */
3810 && (!overlay_debugging
|| b
->section
== section
)
3811 && breakpoint_address_is_meaningful (b
))
3817 /* set_raw_breakpoint() is a low level routine for allocating and
3818 partially initializing a breakpoint of type BPTYPE. The newly
3819 created breakpoint's address, section, source file name, and line
3820 number are provided by SAL. The newly created and partially
3821 initialized breakpoint is added to the breakpoint chain and
3822 is also returned as the value of this function.
3824 It is expected that the caller will complete the initialization of
3825 the newly created breakpoint struct as well as output any status
3826 information regarding the creation of a new breakpoint. In
3827 particular, set_raw_breakpoint() does NOT set the breakpoint
3828 number! Care should be taken to not allow an error() to occur
3829 prior to completing the initialization of the breakpoint. If this
3830 should happen, a bogus breakpoint will be left on the chain. */
3833 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
3835 register struct breakpoint
*b
, *b1
;
3837 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
3838 memset (b
, 0, sizeof (*b
));
3839 b
->address
= sal
.pc
;
3840 if (sal
.symtab
== NULL
)
3841 b
->source_file
= NULL
;
3843 b
->source_file
= savestring (sal
.symtab
->filename
,
3844 strlen (sal
.symtab
->filename
));
3845 b
->section
= sal
.section
;
3847 b
->language
= current_language
->la_language
;
3848 b
->input_radix
= input_radix
;
3850 b
->line_number
= sal
.line
;
3851 b
->enable_state
= bp_enabled
;
3854 b
->ignore_count
= 0;
3856 b
->frame_id
= null_frame_id
;
3857 b
->dll_pathname
= NULL
;
3858 b
->triggered_dll_pathname
= NULL
;
3859 b
->forked_inferior_pid
= 0;
3860 b
->exec_pathname
= NULL
;
3862 /* Add this breakpoint to the end of the chain
3863 so that a list of breakpoints will come out in order
3864 of increasing numbers. */
3866 b1
= breakpoint_chain
;
3868 breakpoint_chain
= b
;
3876 check_duplicates (b
);
3877 breakpoints_changed ();
3883 /* Note that the breakpoint object B describes a permanent breakpoint
3884 instruction, hard-wired into the inferior's code. */
3886 make_breakpoint_permanent (struct breakpoint
*b
)
3888 b
->enable_state
= bp_permanent
;
3890 /* By definition, permanent breakpoints are already present in the code. */
3894 static struct breakpoint
*
3895 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
3897 static int internal_breakpoint_number
= -1;
3898 struct symtab_and_line sal
;
3899 struct breakpoint
*b
;
3901 init_sal (&sal
); /* initialize to zeroes */
3904 sal
.section
= find_pc_overlay (sal
.pc
);
3906 b
= set_raw_breakpoint (sal
, type
);
3907 b
->number
= internal_breakpoint_number
--;
3908 b
->disposition
= disp_donttouch
;
3915 create_longjmp_breakpoint (char *func_name
)
3917 struct breakpoint
*b
;
3918 struct minimal_symbol
*m
;
3920 if (func_name
== NULL
)
3921 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
3924 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
, NULL
)) == NULL
)
3927 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
3930 b
->enable_state
= bp_disabled
;
3933 b
->addr_string
= xstrdup (func_name
);
3936 /* Call this routine when stepping and nexting to enable a breakpoint
3937 if we do a longjmp(). When we hit that breakpoint, call
3938 set_longjmp_resume_breakpoint() to figure out where we are going. */
3941 enable_longjmp_breakpoint (void)
3943 register struct breakpoint
*b
;
3946 if (b
->type
== bp_longjmp
)
3948 b
->enable_state
= bp_enabled
;
3949 check_duplicates (b
);
3954 disable_longjmp_breakpoint (void)
3956 register struct breakpoint
*b
;
3959 if (b
->type
== bp_longjmp
3960 || b
->type
== bp_longjmp_resume
)
3962 b
->enable_state
= bp_disabled
;
3963 check_duplicates (b
);
3968 create_overlay_event_breakpoint (char *func_name
)
3970 struct breakpoint
*b
;
3971 struct minimal_symbol
*m
;
3973 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
, NULL
)) == NULL
)
3976 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
3978 b
->addr_string
= xstrdup (func_name
);
3980 if (overlay_debugging
== ovly_auto
)
3982 b
->enable_state
= bp_enabled
;
3983 overlay_events_enabled
= 1;
3987 b
->enable_state
= bp_disabled
;
3988 overlay_events_enabled
= 0;
3993 enable_overlay_breakpoints (void)
3995 register struct breakpoint
*b
;
3998 if (b
->type
== bp_overlay_event
)
4000 b
->enable_state
= bp_enabled
;
4001 check_duplicates (b
);
4002 overlay_events_enabled
= 1;
4007 disable_overlay_breakpoints (void)
4009 register struct breakpoint
*b
;
4012 if (b
->type
== bp_overlay_event
)
4014 b
->enable_state
= bp_disabled
;
4015 check_duplicates (b
);
4016 overlay_events_enabled
= 0;
4021 create_thread_event_breakpoint (CORE_ADDR address
)
4023 struct breakpoint
*b
;
4025 b
= create_internal_breakpoint (address
, bp_thread_event
);
4027 b
->enable_state
= bp_enabled
;
4028 /* addr_string has to be used or breakpoint_re_set will delete me. */
4029 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->address
));
4035 remove_thread_event_breakpoints (void)
4037 struct breakpoint
*b
, *temp
;
4039 ALL_BREAKPOINTS_SAFE (b
, temp
)
4040 if (b
->type
== bp_thread_event
)
4041 delete_breakpoint (b
);
4046 remove_solib_event_breakpoints (void)
4048 register struct breakpoint
*b
, *temp
;
4050 ALL_BREAKPOINTS_SAFE (b
, temp
)
4051 if (b
->type
== bp_shlib_event
)
4052 delete_breakpoint (b
);
4056 create_solib_event_breakpoint (CORE_ADDR address
)
4058 struct breakpoint
*b
;
4060 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4064 /* Disable any breakpoints that are on code in shared libraries. Only
4065 apply to enabled breakpoints, disabled ones can just stay disabled. */
4068 disable_breakpoints_in_shlibs (int silent
)
4070 struct breakpoint
*b
;
4071 int disabled_shlib_breaks
= 0;
4073 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4076 #if defined (PC_SOLIB)
4077 if (((b
->type
== bp_breakpoint
) ||
4078 (b
->type
== bp_hardware_breakpoint
)) &&
4079 b
->enable_state
== bp_enabled
&&
4081 PC_SOLIB (b
->address
))
4083 b
->enable_state
= bp_shlib_disabled
;
4086 if (!disabled_shlib_breaks
)
4088 target_terminal_ours_for_output ();
4089 warning ("Temporarily disabling shared library breakpoints:");
4091 disabled_shlib_breaks
= 1;
4092 warning ("breakpoint #%d ", b
->number
);
4099 /* Try to reenable any breakpoints in shared libraries. */
4101 re_enable_breakpoints_in_shlibs (void)
4103 struct breakpoint
*b
;
4106 if (b
->enable_state
== bp_shlib_disabled
)
4110 /* Do not reenable the breakpoint if the shared library
4111 is still not mapped in. */
4112 if (target_read_memory (b
->address
, buf
, 1) == 0)
4113 b
->enable_state
= bp_enabled
;
4120 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4121 char *cond_string
, enum bptype bp_kind
)
4123 struct breakpoint
*b
;
4124 struct symtabs_and_lines sals
;
4125 struct cleanup
*old_chain
;
4126 struct cleanup
*canonical_strings_chain
= NULL
;
4127 char *addr_start
= hookname
;
4128 char *addr_end
= NULL
;
4129 char **canonical
= (char **) NULL
;
4130 int thread
= -1; /* All threads. */
4132 /* Set a breakpoint on the specified hook. */
4133 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
, 0, &canonical
);
4134 addr_end
= hookname
;
4136 if (sals
.nelts
== 0)
4138 warning ("Unable to set a breakpoint on dynamic linker callback.");
4139 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4140 warning ("GDB will be unable to track shl_load/shl_unload calls");
4143 if (sals
.nelts
!= 1)
4145 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4146 warning ("GDB will be unable to track shl_load/shl_unload calls");
4150 /* Make sure that all storage allocated in decode_line_1 gets freed
4151 in case the following errors out. */
4152 old_chain
= make_cleanup (xfree
, sals
.sals
);
4153 if (canonical
!= (char **) NULL
)
4155 make_cleanup (xfree
, canonical
);
4156 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4157 if (canonical
[0] != NULL
)
4158 make_cleanup (xfree
, canonical
[0]);
4161 resolve_sal_pc (&sals
.sals
[0]);
4163 /* Remove the canonical strings from the cleanup, they are needed below. */
4164 if (canonical
!= (char **) NULL
)
4165 discard_cleanups (canonical_strings_chain
);
4167 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4168 set_breakpoint_count (breakpoint_count
+ 1);
4169 b
->number
= breakpoint_count
;
4171 b
->cond_string
= (cond_string
== NULL
) ?
4172 NULL
: savestring (cond_string
, strlen (cond_string
));
4175 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4176 b
->addr_string
= canonical
[0];
4177 else if (addr_start
)
4178 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4180 b
->enable_state
= bp_enabled
;
4181 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4183 if (dll_pathname
== NULL
)
4184 b
->dll_pathname
= NULL
;
4187 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4188 strcpy (b
->dll_pathname
, dll_pathname
);
4192 do_cleanups (old_chain
);
4196 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4197 char *dll_pathname
, char *cond_string
)
4199 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4200 cond_string
, bp_catch_load
);
4204 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4205 char *dll_pathname
, char *cond_string
)
4207 solib_load_unload_1 (hookname
,tempflag
, dll_pathname
,
4208 cond_string
, bp_catch_unload
);
4212 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4213 enum bptype bp_kind
)
4215 struct symtab_and_line sal
;
4216 struct breakpoint
*b
;
4217 int thread
= -1; /* All threads. */
4224 b
= set_raw_breakpoint (sal
, bp_kind
);
4225 set_breakpoint_count (breakpoint_count
+ 1);
4226 b
->number
= breakpoint_count
;
4228 b
->cond_string
= (cond_string
== NULL
) ?
4229 NULL
: savestring (cond_string
, strlen (cond_string
));
4231 b
->addr_string
= NULL
;
4232 b
->enable_state
= bp_enabled
;
4233 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4234 b
->forked_inferior_pid
= 0;
4240 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4242 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4246 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4248 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4252 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4254 struct symtab_and_line sal
;
4255 struct breakpoint
*b
;
4256 int thread
= -1; /* All threads. */
4263 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4264 set_breakpoint_count (breakpoint_count
+ 1);
4265 b
->number
= breakpoint_count
;
4267 b
->cond_string
= (cond_string
== NULL
) ?
4268 NULL
: savestring (cond_string
, strlen (cond_string
));
4270 b
->addr_string
= NULL
;
4271 b
->enable_state
= bp_enabled
;
4272 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4278 hw_breakpoint_used_count (void)
4280 register struct breakpoint
*b
;
4285 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4293 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4295 register struct breakpoint
*b
;
4298 *other_type_used
= 0;
4301 if (b
->enable_state
== bp_enabled
)
4303 if (b
->type
== type
)
4305 else if ((b
->type
== bp_hardware_watchpoint
||
4306 b
->type
== bp_read_watchpoint
||
4307 b
->type
== bp_access_watchpoint
)
4308 && b
->enable_state
== bp_enabled
)
4309 *other_type_used
= 1;
4315 /* Call this after hitting the longjmp() breakpoint. Use this to set
4316 a new breakpoint at the target of the jmp_buf.
4318 FIXME - This ought to be done by setting a temporary breakpoint
4319 that gets deleted automatically... */
4322 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4324 register struct breakpoint
*b
;
4327 if (b
->type
== bp_longjmp_resume
)
4330 b
->enable_state
= bp_enabled
;
4331 b
->frame_id
= frame_id
;
4332 check_duplicates (b
);
4338 disable_watchpoints_before_interactive_call_start (void)
4340 struct breakpoint
*b
;
4344 if (((b
->type
== bp_watchpoint
)
4345 || (b
->type
== bp_hardware_watchpoint
)
4346 || (b
->type
== bp_read_watchpoint
)
4347 || (b
->type
== bp_access_watchpoint
)
4348 || ep_is_exception_catchpoint (b
))
4349 && (b
->enable_state
== bp_enabled
))
4351 b
->enable_state
= bp_call_disabled
;
4352 check_duplicates (b
);
4358 enable_watchpoints_after_interactive_call_stop (void)
4360 struct breakpoint
*b
;
4364 if (((b
->type
== bp_watchpoint
)
4365 || (b
->type
== bp_hardware_watchpoint
)
4366 || (b
->type
== bp_read_watchpoint
)
4367 || (b
->type
== bp_access_watchpoint
)
4368 || ep_is_exception_catchpoint (b
))
4369 && (b
->enable_state
== bp_call_disabled
))
4371 b
->enable_state
= bp_enabled
;
4372 check_duplicates (b
);
4378 /* Set a breakpoint that will evaporate an end of command
4379 at address specified by SAL.
4380 Restrict it to frame FRAME if FRAME is nonzero. */
4383 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4386 register struct breakpoint
*b
;
4387 b
= set_raw_breakpoint (sal
, type
);
4388 b
->enable_state
= bp_enabled
;
4389 b
->disposition
= disp_donttouch
;
4390 b
->frame_id
= frame_id
;
4392 /* If we're debugging a multi-threaded program, then we
4393 want momentary breakpoints to be active in only a
4394 single thread of control. */
4395 if (in_thread_list (inferior_ptid
))
4396 b
->thread
= pid_to_thread_id (inferior_ptid
);
4402 /* Tell the user we have just set a breakpoint B. */
4405 mention (struct breakpoint
*b
)
4408 struct cleanup
*old_chain
, *ui_out_chain
;
4409 struct ui_stream
*stb
;
4411 stb
= ui_out_stream_new (uiout
);
4412 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4414 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4415 watchpoint) other than breakpoint creation. It should be possible to
4416 clean this up and at the same time replace the random calls to
4417 breakpoint_changed with this hook, as has already been done for
4418 delete_breakpoint_hook and so on. */
4419 if (create_breakpoint_hook
)
4420 create_breakpoint_hook (b
);
4421 breakpoint_create_event (b
->number
);
4426 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4429 ui_out_text (uiout
, "Watchpoint ");
4430 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4431 ui_out_field_int (uiout
, "number", b
->number
);
4432 ui_out_text (uiout
, ": ");
4433 print_expression (b
->exp
, stb
->stream
);
4434 ui_out_field_stream (uiout
, "exp", stb
);
4435 do_cleanups (ui_out_chain
);
4437 case bp_hardware_watchpoint
:
4438 ui_out_text (uiout
, "Hardware watchpoint ");
4439 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4440 ui_out_field_int (uiout
, "number", b
->number
);
4441 ui_out_text (uiout
, ": ");
4442 print_expression (b
->exp
, stb
->stream
);
4443 ui_out_field_stream (uiout
, "exp", stb
);
4444 do_cleanups (ui_out_chain
);
4446 case bp_read_watchpoint
:
4447 ui_out_text (uiout
, "Hardware read watchpoint ");
4448 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4449 ui_out_field_int (uiout
, "number", b
->number
);
4450 ui_out_text (uiout
, ": ");
4451 print_expression (b
->exp
, stb
->stream
);
4452 ui_out_field_stream (uiout
, "exp", stb
);
4453 do_cleanups (ui_out_chain
);
4455 case bp_access_watchpoint
:
4456 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4457 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4458 ui_out_field_int (uiout
, "number", b
->number
);
4459 ui_out_text (uiout
, ": ");
4460 print_expression (b
->exp
, stb
->stream
);
4461 ui_out_field_stream (uiout
, "exp", stb
);
4462 do_cleanups (ui_out_chain
);
4465 if (ui_out_is_mi_like_p (uiout
))
4470 printf_filtered ("Breakpoint %d", b
->number
);
4473 case bp_hardware_breakpoint
:
4474 if (ui_out_is_mi_like_p (uiout
))
4479 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4483 case bp_catch_unload
:
4484 printf_filtered ("Catchpoint %d (%s %s)",
4486 (b
->type
== bp_catch_load
) ? "load" : "unload",
4487 (b
->dll_pathname
!= NULL
) ?
4488 b
->dll_pathname
: "<any library>");
4491 case bp_catch_vfork
:
4492 printf_filtered ("Catchpoint %d (%s)",
4494 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4497 printf_filtered ("Catchpoint %d (exec)",
4500 case bp_catch_catch
:
4501 case bp_catch_throw
:
4502 printf_filtered ("Catchpoint %d (%s)",
4504 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4510 case bp_longjmp_resume
:
4511 case bp_step_resume
:
4512 case bp_through_sigtramp
:
4514 case bp_watchpoint_scope
:
4515 case bp_shlib_event
:
4516 case bp_thread_event
:
4517 case bp_overlay_event
:
4522 if (addressprint
|| b
->source_file
== NULL
)
4524 printf_filtered (" at ");
4525 print_address_numeric (b
->address
, 1, gdb_stdout
);
4528 printf_filtered (": file %s, line %d.",
4529 b
->source_file
, b
->line_number
);
4531 do_cleanups (old_chain
);
4532 if (ui_out_is_mi_like_p (uiout
))
4534 printf_filtered ("\n");
4538 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4539 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4540 COND[i] and COND_STRING[i] values.
4542 NOTE: If the function succeeds, the caller is expected to cleanup
4543 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4544 array contents). If the function fails (error() is called), the
4545 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4546 COND and SALS arrays and each of those arrays contents. */
4549 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4550 struct expression
**cond
, char **cond_string
,
4551 enum bptype type
, enum bpdisp disposition
,
4552 int thread
, int ignore_count
, int from_tty
)
4554 if (type
== bp_hardware_breakpoint
)
4556 int i
= hw_breakpoint_used_count ();
4557 int target_resources_ok
=
4558 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4560 if (target_resources_ok
== 0)
4561 error ("No hardware breakpoint support in the target.");
4562 else if (target_resources_ok
< 0)
4563 error ("Hardware breakpoints used exceeds limit.");
4566 /* Now set all the breakpoints. */
4569 for (i
= 0; i
< sals
.nelts
; i
++)
4571 struct breakpoint
*b
;
4572 struct symtab_and_line sal
= sals
.sals
[i
];
4575 describe_other_breakpoints (sal
.pc
, sal
.section
);
4577 b
= set_raw_breakpoint (sal
, type
);
4578 set_breakpoint_count (breakpoint_count
+ 1);
4579 b
->number
= breakpoint_count
;
4583 b
->addr_string
= addr_string
[i
];
4585 /* addr_string has to be used or breakpoint_re_set will delete
4587 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->address
));
4588 b
->cond_string
= cond_string
[i
];
4589 b
->ignore_count
= ignore_count
;
4590 b
->enable_state
= bp_enabled
;
4591 b
->disposition
= disposition
;
4597 /* Parse ARG which is assumed to be a SAL specification possibly
4598 followed by conditionals. On return, SALS contains an array of SAL
4599 addresses found. ADDR_STRING contains a vector of (canonical)
4600 address strings. ARG points to the end of the SAL. */
4603 parse_breakpoint_sals (char **address
,
4604 struct symtabs_and_lines
*sals
,
4605 char ***addr_string
)
4607 char *addr_start
= *address
;
4608 *addr_string
= NULL
;
4609 /* If no arg given, or if first arg is 'if ', use the default
4611 if ((*address
) == NULL
4612 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4614 if (default_breakpoint_valid
)
4616 struct symtab_and_line sal
;
4617 init_sal (&sal
); /* initialize to zeroes */
4618 sals
->sals
= (struct symtab_and_line
*)
4619 xmalloc (sizeof (struct symtab_and_line
));
4620 sal
.pc
= default_breakpoint_address
;
4621 sal
.line
= default_breakpoint_line
;
4622 sal
.symtab
= default_breakpoint_symtab
;
4623 sal
.section
= find_pc_overlay (sal
.pc
);
4624 sals
->sals
[0] = sal
;
4628 error ("No default breakpoint address now.");
4632 /* Force almost all breakpoints to be in terms of the
4633 current_source_symtab (which is decode_line_1's default). This
4634 should produce the results we want almost all of the time while
4635 leaving default_breakpoint_* alone.
4636 ObjC: However, don't match an Objective-C method name which
4637 may have a '+' or '-' succeeded by a '[' */
4639 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
4641 if (default_breakpoint_valid
4643 || ((strchr ("+-", (*address
)[0]) != NULL
)
4644 && ((*address
)[1] != '['))))
4645 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
4646 default_breakpoint_line
, addr_string
);
4648 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0, addr_string
);
4650 /* For any SAL that didn't have a canonical string, fill one in. */
4651 if (sals
->nelts
> 0 && *addr_string
== NULL
)
4652 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
4653 if (addr_start
!= (*address
))
4656 for (i
= 0; i
< sals
->nelts
; i
++)
4658 /* Add the string if not present. */
4659 if ((*addr_string
)[i
] == NULL
)
4660 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
4666 /* Convert each SAL into a real PC. Verify that the PC can be
4667 inserted as a breakpoint. If it can't throw an error. */
4670 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
4674 for (i
= 0; i
< sals
->nelts
; i
++)
4676 resolve_sal_pc (&sals
->sals
[i
]);
4678 /* It's possible for the PC to be nonzero, but still an illegal
4679 value on some targets.
4681 For example, on HP-UX if you start gdb, and before running the
4682 inferior you try to set a breakpoint on a shared library function
4683 "foo" where the inferior doesn't call "foo" directly but does
4684 pass its address to another function call, then we do find a
4685 minimal symbol for the "foo", but it's address is invalid.
4686 (Appears to be an index into a table that the loader sets up
4687 when the inferior is run.)
4689 Give the target a chance to bless sals.sals[i].pc before we
4690 try to make a breakpoint for it. */
4691 if (PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
4693 if (address
== NULL
)
4694 error ("Cannot break without a running program.");
4696 error ("Cannot break on %s without a running program.",
4702 /* Set a breakpoint according to ARG (function, linenum or *address)
4703 flag: first bit : 0 non-temporary, 1 temporary.
4704 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4707 break_command_1 (char *arg
, int flag
, int from_tty
)
4709 int tempflag
, hardwareflag
;
4710 struct symtabs_and_lines sals
;
4711 register struct expression
**cond
= 0;
4712 /* Pointers in arg to the start, and one past the end, of the
4714 char **cond_string
= (char **) NULL
;
4715 char *addr_start
= arg
;
4717 struct cleanup
*old_chain
;
4718 struct cleanup
*breakpoint_chain
= NULL
;
4721 int ignore_count
= 0;
4723 hardwareflag
= flag
& BP_HARDWAREFLAG
;
4724 tempflag
= flag
& BP_TEMPFLAG
;
4729 parse_breakpoint_sals (&arg
, &sals
, &addr_string
);
4734 /* Create a chain of things that always need to be cleaned up. */
4735 old_chain
= make_cleanup (null_cleanup
, 0);
4737 /* Make sure that all storage allocated to SALS gets freed. */
4738 make_cleanup (xfree
, sals
.sals
);
4740 /* Cleanup the addr_string array but not its contents. */
4741 make_cleanup (xfree
, addr_string
);
4743 /* Allocate space for all the cond expressions. */
4744 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4745 make_cleanup (xfree
, cond
);
4747 /* Allocate space for all the cond strings. */
4748 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4749 make_cleanup (xfree
, cond_string
);
4751 /* ----------------------------- SNIP -----------------------------
4752 Anything added to the cleanup chain beyond this point is assumed
4753 to be part of a breakpoint. If the breakpoint create succeeds
4754 then the memory is not reclaimed. */
4755 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4757 /* Mark the contents of the addr_string for cleanup. These go on
4758 the breakpoint_chain and only occure if the breakpoint create
4760 for (i
= 0; i
< sals
.nelts
; i
++)
4762 if (addr_string
[i
] != NULL
)
4763 make_cleanup (xfree
, addr_string
[i
]);
4766 /* Resolve all line numbers to PC's and verify that the addresses
4767 are ok for the target. */
4768 breakpoint_sals_to_pc (&sals
, addr_start
);
4770 /* Verify that condition can be parsed, before setting any
4771 breakpoints. Allocate a separate condition expression for each
4773 thread
= -1; /* No specific thread yet */
4774 for (i
= 0; i
< sals
.nelts
; i
++)
4781 char *cond_start
= NULL
;
4782 char *cond_end
= NULL
;
4783 while (*tok
== ' ' || *tok
== '\t')
4788 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
4791 toklen
= end_tok
- tok
;
4793 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
4795 tok
= cond_start
= end_tok
+ 1;
4796 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4797 make_cleanup (xfree
, cond
[i
]);
4799 cond_string
[i
] = savestring (cond_start
, cond_end
- cond_start
);
4800 make_cleanup (xfree
, cond_string
[i
]);
4802 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
4808 thread
= strtol (tok
, &tok
, 0);
4810 error ("Junk after thread keyword.");
4811 if (!valid_thread_id (thread
))
4812 error ("Unknown thread %d\n", thread
);
4815 error ("Junk at end of arguments.");
4819 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
4820 hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
4821 tempflag
? disp_del
: disp_donttouch
,
4822 thread
, ignore_count
, from_tty
);
4826 warning ("Multiple breakpoints were set.");
4827 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
4829 /* That's it. Discard the cleanups for data inserted into the
4831 discard_cleanups (breakpoint_chain
);
4832 /* But cleanup everything else. */
4833 do_cleanups (old_chain
);
4836 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
4837 linenum or *address) with COND and IGNORE_COUNT. */
4839 struct captured_breakpoint_args
4850 do_captured_breakpoint (void *data
)
4852 struct captured_breakpoint_args
*args
= data
;
4853 struct symtabs_and_lines sals
;
4854 register struct expression
**cond
;
4855 struct cleanup
*old_chain
;
4856 struct cleanup
*breakpoint_chain
= NULL
;
4863 /* Parse the source and lines spec. Delay check that the expression
4864 didn't contain trailing garbage until after cleanups are in
4868 address_end
= args
->address
;
4870 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
);
4875 /* Create a chain of things at always need to be cleaned up. */
4876 old_chain
= make_cleanup (null_cleanup
, 0);
4878 /* Always have a addr_string array, even if it is empty. */
4879 make_cleanup (xfree
, addr_string
);
4881 /* Make sure that all storage allocated to SALS gets freed. */
4882 make_cleanup (xfree
, sals
.sals
);
4884 /* Allocate space for all the cond expressions. */
4885 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4886 make_cleanup (xfree
, cond
);
4888 /* Allocate space for all the cond strings. */
4889 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4890 make_cleanup (xfree
, cond_string
);
4892 /* ----------------------------- SNIP -----------------------------
4893 Anything added to the cleanup chain beyond this point is assumed
4894 to be part of a breakpoint. If the breakpoint create goes
4895 through then that memory is not cleaned up. */
4896 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4898 /* Mark the contents of the addr_string for cleanup. These go on
4899 the breakpoint_chain and only occure if the breakpoint create
4901 for (i
= 0; i
< sals
.nelts
; i
++)
4903 if (addr_string
[i
] != NULL
)
4904 make_cleanup (xfree
, addr_string
[i
]);
4907 /* Wait until now before checking for garbage at the end of the
4908 address. That way cleanups can take care of freeing any
4910 if (*address_end
!= '\0')
4911 error ("Garbage %s following breakpoint address", address_end
);
4913 /* Resolve all line numbers to PC's. */
4914 breakpoint_sals_to_pc (&sals
, args
->address
);
4916 /* Verify that conditions can be parsed, before setting any
4918 for (i
= 0; i
< sals
.nelts
; i
++)
4920 if (args
->condition
!= NULL
)
4922 char *tok
= args
->condition
;
4923 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4925 error ("Garbage %s follows condition", tok
);
4926 make_cleanup (xfree
, cond
[i
]);
4927 cond_string
[i
] = xstrdup (args
->condition
);
4931 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
4932 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
4933 args
->tempflag
? disp_del
: disp_donttouch
,
4934 args
->thread
, args
->ignore_count
, 0/*from-tty*/);
4936 /* That's it. Discard the cleanups for data inserted into the
4938 discard_cleanups (breakpoint_chain
);
4939 /* But cleanup everything else. */
4940 do_cleanups (old_chain
);
4945 gdb_breakpoint (char *address
, char *condition
,
4946 int hardwareflag
, int tempflag
,
4947 int thread
, int ignore_count
)
4949 struct captured_breakpoint_args args
;
4950 args
.address
= address
;
4951 args
.condition
= condition
;
4952 args
.hardwareflag
= hardwareflag
;
4953 args
.tempflag
= tempflag
;
4954 args
.thread
= thread
;
4955 args
.ignore_count
= ignore_count
;
4956 return catch_errors (do_captured_breakpoint
, &args
,
4957 NULL
, RETURN_MASK_ALL
);
4962 break_at_finish_at_depth_command_1 (char *arg
, int flag
, int from_tty
)
4964 struct frame_info
*frame
;
4965 CORE_ADDR low
, high
, selected_pc
= 0;
4966 char *extra_args
= NULL
;
4969 int extra_args_len
= 0, if_arg
= 0;
4972 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
4975 if (default_breakpoint_valid
)
4977 if (deprecated_selected_frame
)
4979 selected_pc
= get_frame_pc (deprecated_selected_frame
);
4984 error ("No selected frame.");
4987 error ("No default breakpoint address now.");
4991 extra_args
= strchr (arg
, ' ');
4995 extra_args_len
= strlen (extra_args
);
4996 level_arg
= (char *) xmalloc (extra_args
- arg
);
4997 strncpy (level_arg
, arg
, extra_args
- arg
- 1);
4998 level_arg
[extra_args
- arg
- 1] = '\0';
5002 level_arg
= (char *) xmalloc (strlen (arg
) + 1);
5003 strcpy (level_arg
, arg
);
5006 frame
= parse_frame_specification (level_arg
);
5008 selected_pc
= get_frame_pc (frame
);
5015 extra_args_len
= strlen (arg
);
5020 if (find_pc_partial_function (selected_pc
, (char **) NULL
, &low
, &high
))
5022 addr_string
= (char *) xmalloc (26 + extra_args_len
);
5024 sprintf (addr_string
, "*0x%s %s", paddr_nz (high
), extra_args
);
5026 sprintf (addr_string
, "*0x%s", paddr_nz (high
));
5027 break_command_1 (addr_string
, flag
, from_tty
);
5028 xfree (addr_string
);
5031 error ("No function contains the specified address");
5034 error ("Unable to set breakpoint at procedure exit");
5039 break_at_finish_command_1 (char *arg
, int flag
, int from_tty
)
5041 char *addr_string
, *break_string
, *beg_addr_string
;
5042 CORE_ADDR low
, high
;
5043 struct symtabs_and_lines sals
;
5044 struct symtab_and_line sal
;
5045 struct cleanup
*old_chain
;
5046 char *extra_args
= NULL
;
5047 int extra_args_len
= 0;
5051 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5053 if (default_breakpoint_valid
)
5055 if (deprecated_selected_frame
)
5057 addr_string
= (char *) xmalloc (15);
5058 sprintf (addr_string
, "*0x%s",
5059 paddr_nz (get_frame_pc (deprecated_selected_frame
)));
5064 error ("No selected frame.");
5067 error ("No default breakpoint address now.");
5071 addr_string
= (char *) xmalloc (strlen (arg
) + 1);
5072 strcpy (addr_string
, arg
);
5078 extra_args_len
= strlen (arg
);
5082 /* get the stuff after the function name or address */
5083 extra_args
= strchr (arg
, ' ');
5087 extra_args_len
= strlen (extra_args
);
5094 beg_addr_string
= addr_string
;
5095 sals
= decode_line_1 (&addr_string
, 1, (struct symtab
*) NULL
, 0,
5098 xfree (beg_addr_string
);
5099 old_chain
= make_cleanup (xfree
, sals
.sals
);
5100 for (i
= 0; (i
< sals
.nelts
); i
++)
5103 if (find_pc_partial_function (sal
.pc
, (char **) NULL
, &low
, &high
))
5105 break_string
= (char *) xmalloc (extra_args_len
+ 26);
5107 sprintf (break_string
, "*0x%s %s", paddr_nz (high
), extra_args
);
5109 sprintf (break_string
, "*0x%s", paddr_nz (high
));
5110 break_command_1 (break_string
, flag
, from_tty
);
5111 xfree (break_string
);
5114 error ("No function contains the specified address");
5118 warning ("Multiple breakpoints were set.\n");
5119 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5121 do_cleanups (old_chain
);
5125 /* Helper function for break_command_1 and disassemble_command. */
5128 resolve_sal_pc (struct symtab_and_line
*sal
)
5132 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5134 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5135 error ("No line %d in file \"%s\".",
5136 sal
->line
, sal
->symtab
->filename
);
5140 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5142 struct blockvector
*bv
;
5147 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5150 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5151 sym
= block_function (b
);
5154 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5155 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5159 /* It really is worthwhile to have the section, so we'll just
5160 have to look harder. This case can be executed if we have
5161 line numbers but no functions (as can happen in assembly
5164 struct minimal_symbol
*msym
;
5166 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5168 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5175 break_command (char *arg
, int from_tty
)
5177 break_command_1 (arg
, 0, from_tty
);
5181 break_at_finish_command (char *arg
, int from_tty
)
5183 break_at_finish_command_1 (arg
, 0, from_tty
);
5187 break_at_finish_at_depth_command (char *arg
, int from_tty
)
5189 break_at_finish_at_depth_command_1 (arg
, 0, from_tty
);
5193 tbreak_command (char *arg
, int from_tty
)
5195 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5199 tbreak_at_finish_command (char *arg
, int from_tty
)
5201 break_at_finish_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5205 hbreak_command (char *arg
, int from_tty
)
5207 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5211 thbreak_command (char *arg
, int from_tty
)
5213 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5217 stop_command (char *arg
, int from_tty
)
5219 printf_filtered ("Specify the type of breakpoint to set.\n\
5220 Usage: stop in <function | address>\n\
5225 stopin_command (char *arg
, int from_tty
)
5229 if (arg
== (char *) NULL
)
5231 else if (*arg
!= '*')
5236 /* look for a ':'. If this is a line number specification, then
5237 say it is bad, otherwise, it should be an address or
5238 function/method name */
5239 while (*argptr
&& !hasColon
)
5241 hasColon
= (*argptr
== ':');
5246 badInput
= (*argptr
!= ':'); /* Not a class::method */
5248 badInput
= isdigit (*arg
); /* a simple line number */
5252 printf_filtered ("Usage: stop in <function | address>\n");
5254 break_command_1 (arg
, 0, from_tty
);
5258 stopat_command (char *arg
, int from_tty
)
5262 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5269 /* look for a ':'. If there is a '::' then get out, otherwise
5270 it is probably a line number. */
5271 while (*argptr
&& !hasColon
)
5273 hasColon
= (*argptr
== ':');
5278 badInput
= (*argptr
== ':'); /* we have class::method */
5280 badInput
= !isdigit (*arg
); /* not a line number */
5284 printf_filtered ("Usage: stop at <line>\n");
5286 break_command_1 (arg
, 0, from_tty
);
5290 /* accessflag: hw_write: watch write,
5291 hw_read: watch read,
5292 hw_access: watch access (read or write) */
5294 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5296 struct breakpoint
*b
;
5297 struct symtab_and_line sal
;
5298 struct expression
*exp
;
5299 struct block
*exp_valid_block
;
5300 struct value
*val
, *mark
;
5301 struct frame_info
*frame
;
5302 struct frame_info
*prev_frame
= NULL
;
5303 char *exp_start
= NULL
;
5304 char *exp_end
= NULL
;
5305 char *tok
, *end_tok
;
5307 char *cond_start
= NULL
;
5308 char *cond_end
= NULL
;
5309 struct expression
*cond
= NULL
;
5310 int i
, other_type_used
, target_resources_ok
= 0;
5311 enum bptype bp_type
;
5314 init_sal (&sal
); /* initialize to zeroes */
5316 /* Parse arguments. */
5317 innermost_block
= NULL
;
5319 exp
= parse_exp_1 (&arg
, 0, 0);
5321 exp_valid_block
= innermost_block
;
5322 mark
= value_mark ();
5323 val
= evaluate_expression (exp
);
5324 release_value (val
);
5325 if (VALUE_LAZY (val
))
5326 value_fetch_lazy (val
);
5329 while (*tok
== ' ' || *tok
== '\t')
5333 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5336 toklen
= end_tok
- tok
;
5337 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5339 tok
= cond_start
= end_tok
+ 1;
5340 cond
= parse_exp_1 (&tok
, 0, 0);
5344 error ("Junk at end of command.");
5346 if (accessflag
== hw_read
)
5347 bp_type
= bp_read_watchpoint
;
5348 else if (accessflag
== hw_access
)
5349 bp_type
= bp_access_watchpoint
;
5351 bp_type
= bp_hardware_watchpoint
;
5353 mem_cnt
= can_use_hardware_watchpoint (val
);
5354 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5355 error ("Expression cannot be implemented with read/access watchpoint.");
5358 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5359 target_resources_ok
=
5360 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5362 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5363 error ("Target does not support this type of hardware watchpoint.");
5365 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5366 error ("Target can only support one kind of HW watchpoint at a time.");
5369 #if defined(HPUXHPPA)
5370 /* On HP-UX if you set a h/w
5371 watchpoint before the "run" command, the inferior dies with a e.g.,
5372 SIGILL once you start it. I initially believed this was due to a
5373 bad interaction between page protection traps and the initial
5374 startup sequence by the dynamic linker.
5376 However, I tried avoiding that by having HP-UX's implementation of
5377 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5378 yet, which forced slow watches before a "run" or "attach", and it
5379 still fails somewhere in the startup code.
5381 Until I figure out what's happening, I'm disallowing watches altogether
5382 before the "run" or "attach" command. We'll tell the user they must
5383 set watches after getting the program started. */
5384 if (!target_has_execution
)
5386 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5389 #endif /* HPUXHPPA */
5391 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5392 watchpoint could not be set. */
5393 if (!mem_cnt
|| target_resources_ok
<= 0)
5394 bp_type
= bp_watchpoint
;
5396 /* Now set up the breakpoint. */
5397 b
= set_raw_breakpoint (sal
, bp_type
);
5398 set_breakpoint_count (breakpoint_count
+ 1);
5399 b
->number
= breakpoint_count
;
5400 b
->disposition
= disp_donttouch
;
5402 b
->exp_valid_block
= exp_valid_block
;
5403 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5407 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5411 frame
= block_innermost_frame (exp_valid_block
);
5414 prev_frame
= get_prev_frame (frame
);
5415 b
->watchpoint_frame
= get_frame_id (frame
);
5419 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5422 /* If the expression is "local", then set up a "watchpoint scope"
5423 breakpoint at the point where we've left the scope of the watchpoint
5425 if (innermost_block
)
5429 struct breakpoint
*scope_breakpoint
;
5430 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5431 bp_watchpoint_scope
);
5433 scope_breakpoint
->enable_state
= bp_enabled
;
5435 /* Automatically delete the breakpoint when it hits. */
5436 scope_breakpoint
->disposition
= disp_del
;
5438 /* Only break in the proper frame (help with recursion). */
5439 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5441 /* Set the address at which we will stop. */
5442 scope_breakpoint
->address
= get_frame_pc (prev_frame
);
5444 /* The scope breakpoint is related to the watchpoint. We
5445 will need to act on them together. */
5446 b
->related_breakpoint
= scope_breakpoint
;
5449 value_free_to_mark (mark
);
5453 /* Return count of locations need to be watched and can be handled
5454 in hardware. If the watchpoint can not be handled
5455 in hardware return zero. */
5457 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5458 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5459 ((BYTE_SIZE) <= (REGISTER_SIZE))
5462 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5463 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5464 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5468 can_use_hardware_watchpoint (struct value
*v
)
5470 int found_memory_cnt
= 0;
5471 struct value
*head
= v
;
5473 /* Did the user specifically forbid us to use hardware watchpoints? */
5474 if (!can_use_hw_watchpoints
)
5477 /* Make sure that the value of the expression depends only upon
5478 memory contents, and values computed from them within GDB. If we
5479 find any register references or function calls, we can't use a
5480 hardware watchpoint.
5482 The idea here is that evaluating an expression generates a series
5483 of values, one holding the value of every subexpression. (The
5484 expression a*b+c has five subexpressions: a, b, a*b, c, and
5485 a*b+c.) GDB's values hold almost enough information to establish
5486 the criteria given above --- they identify memory lvalues,
5487 register lvalues, computed values, etcetera. So we can evaluate
5488 the expression, and then scan the chain of values that leaves
5489 behind to decide whether we can detect any possible change to the
5490 expression's final value using only hardware watchpoints.
5492 However, I don't think that the values returned by inferior
5493 function calls are special in any way. So this function may not
5494 notice that an expression involving an inferior function call
5495 can't be watched with hardware watchpoints. FIXME. */
5496 for (; v
; v
= v
->next
)
5498 if (VALUE_LVAL (v
) == lval_memory
)
5501 /* A lazy memory lvalue is one that GDB never needed to fetch;
5502 we either just used its address (e.g., `a' in `a.b') or
5503 we never needed it at all (e.g., `a' in `a,b'). */
5507 /* Ahh, memory we actually used! Check if we can cover
5508 it with hardware watchpoints. */
5509 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
5511 /* We only watch structs and arrays if user asked for it
5512 explicitly, never if they just happen to appear in a
5513 middle of some value chain. */
5515 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5516 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5518 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
5519 int len
= TYPE_LENGTH (VALUE_TYPE (v
));
5521 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5528 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
5529 return 0; /* ??? What does this represent? */
5530 else if (v
->lval
== lval_register
)
5531 return 0; /* cannot watch a register with a HW watchpoint */
5534 /* The expression itself looks suitable for using a hardware
5535 watchpoint, but give the target machine a chance to reject it. */
5536 return found_memory_cnt
;
5540 watch_command_wrapper (char *arg
, int from_tty
)
5542 watch_command (arg
, from_tty
);
5546 watch_command (char *arg
, int from_tty
)
5548 watch_command_1 (arg
, hw_write
, from_tty
);
5552 rwatch_command_wrapper (char *arg
, int from_tty
)
5554 rwatch_command (arg
, from_tty
);
5558 rwatch_command (char *arg
, int from_tty
)
5560 watch_command_1 (arg
, hw_read
, from_tty
);
5564 awatch_command_wrapper (char *arg
, int from_tty
)
5566 awatch_command (arg
, from_tty
);
5570 awatch_command (char *arg
, int from_tty
)
5572 watch_command_1 (arg
, hw_access
, from_tty
);
5576 /* Helper routines for the until_command routine in infcmd.c. Here
5577 because it uses the mechanisms of breakpoints. */
5579 /* This function is called by fetch_inferior_event via the
5580 cmd_continuation pointer, to complete the until command. It takes
5581 care of cleaning up the temporary breakpoints set up by the until
5584 until_break_command_continuation (struct continuation_arg
*arg
)
5586 struct cleanup
*cleanups
;
5588 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5589 do_exec_cleanups (cleanups
);
5594 until_break_command (char *arg
, int from_tty
, int anywhere
)
5596 struct symtabs_and_lines sals
;
5597 struct symtab_and_line sal
;
5598 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
5599 struct breakpoint
*breakpoint
;
5600 struct cleanup
*old_chain
;
5601 struct continuation_arg
*arg1
;
5604 clear_proceed_status ();
5606 /* Set a breakpoint where the user wants it and at return from
5609 if (default_breakpoint_valid
)
5610 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5611 default_breakpoint_line
, (char ***) NULL
);
5613 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5614 0, (char ***) NULL
);
5616 if (sals
.nelts
!= 1)
5617 error ("Couldn't get information on specified line.");
5620 xfree (sals
.sals
); /* malloc'd, so freed */
5623 error ("Junk at end of arguments.");
5625 resolve_sal_pc (&sal
);
5628 /* If the user told us to continue until a specified location,
5629 we don't specify a frame at which we need to stop. */
5630 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
5632 /* Otherwise, specify the current frame, because we want to stop only
5633 at the very same frame. */
5634 breakpoint
= set_momentary_breakpoint (sal
,
5635 get_frame_id (deprecated_selected_frame
),
5638 if (!event_loop_p
|| !target_can_async_p ())
5639 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5641 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5643 /* If we are running asynchronously, and the target supports async
5644 execution, we are not waiting for the target to stop, in the call
5645 tp proceed, below. This means that we cannot delete the
5646 brekpoints until the target has actually stopped. The only place
5647 where we get a chance to do that is in fetch_inferior_event, so
5648 we must set things up for that. */
5650 if (event_loop_p
&& target_can_async_p ())
5652 /* In this case the arg for the continuation is just the point
5653 in the exec_cleanups chain from where to start doing
5654 cleanups, because all the continuation does is the cleanups in
5655 the exec_cleanup_chain. */
5657 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5659 arg1
->data
.pointer
= old_chain
;
5661 add_continuation (until_break_command_continuation
, arg1
);
5664 /* Keep within the current frame, or in frames called by the current
5668 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
5669 sal
.pc
= get_frame_pc (prev_frame
);
5670 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
5672 if (!event_loop_p
|| !target_can_async_p ())
5673 make_cleanup_delete_breakpoint (breakpoint
);
5675 make_exec_cleanup_delete_breakpoint (breakpoint
);
5678 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
5679 /* Do the cleanups now, anly if we are not running asynchronously,
5680 of if we are, but the target is still synchronous. */
5681 if (!event_loop_p
|| !target_can_async_p ())
5682 do_cleanups (old_chain
);
5686 /* These aren't used; I don't konw what they were for. */
5687 /* Set a breakpoint at the catch clause for NAME. */
5689 catch_breakpoint (char *name
)
5694 disable_catch_breakpoint (void)
5699 delete_catch_breakpoint (void)
5704 enable_catch_breakpoint (void)
5711 struct sal_chain
*next
;
5712 struct symtab_and_line sal
;
5716 /* Not really used -- invocation in handle_gnu_4_16_catch_command
5717 had been commented out in the v.4.16 sources, and stays
5718 disabled there now because "catch NAME" syntax isn't allowed.
5720 /* This isn't used; I don't know what it was for. */
5721 /* For each catch clause identified in ARGS, run FUNCTION
5722 with that clause as an argument. */
5723 static struct symtabs_and_lines
5724 map_catch_names (char *args
, int (*function
) ())
5726 register char *p
= args
;
5728 struct symtabs_and_lines sals
;
5730 struct sal_chain
*sal_chain
= 0;
5734 error_no_arg ("one or more catch names");
5742 /* Don't swallow conditional part. */
5743 if (p1
[0] == 'i' && p1
[1] == 'f'
5744 && (p1
[2] == ' ' || p1
[2] == '\t'))
5750 while (isalnum (*p1
) || *p1
== '_' || *p1
== '$')
5754 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
5755 error ("Arguments must be catch names.");
5761 struct sal_chain
*next
= (struct sal_chain
*)
5762 alloca (sizeof (struct sal_chain
));
5763 next
->next
= sal_chain
;
5764 next
->sal
= get_catch_sal (p
);
5769 printf_unfiltered ("No catch clause for exception %s.\n", p
);
5774 while (*p
== ' ' || *p
== '\t')
5780 /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
5782 static struct symtabs_and_lines
5783 get_catch_sals (int this_level_only
)
5785 register struct blockvector
*bl
;
5786 register struct block
*block
;
5787 int index
, have_default
= 0;
5789 struct symtabs_and_lines sals
;
5790 struct sal_chain
*sal_chain
= 0;
5791 char *blocks_searched
;
5793 /* Not sure whether an error message is always the correct response,
5794 but it's better than a core dump. */
5795 if (deprecated_selected_frame
== NULL
)
5796 error ("No selected frame.");
5797 block
= get_frame_block (deprecated_selected_frame
, 0);
5798 pc
= get_frame_pc (deprecated_selected_frame
);
5804 error ("No symbol table info available.\n");
5806 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
5807 blocks_searched
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
5808 memset (blocks_searched
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
5812 CORE_ADDR end
= BLOCK_END (block
) - 4;
5815 if (bl
!= blockvector_for_pc (end
, &index
))
5816 error ("blockvector blotch");
5817 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
5818 error ("blockvector botch");
5819 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
5822 /* Don't print out blocks that have gone by. */
5823 while (index
< last_index
5824 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
5827 while (index
< last_index
5828 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
5830 if (blocks_searched
[index
] == 0)
5832 struct block
*b
= BLOCKVECTOR_BLOCK (bl
, index
);
5834 register struct symbol
*sym
;
5836 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
5838 if (STREQ (DEPRECATED_SYMBOL_NAME (sym
), "default"))
5844 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
5846 struct sal_chain
*next
= (struct sal_chain
*)
5847 alloca (sizeof (struct sal_chain
));
5848 next
->next
= sal_chain
;
5849 next
->sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
),
5854 blocks_searched
[index
] = 1;
5860 if (sal_chain
&& this_level_only
)
5863 /* After handling the function's top-level block, stop.
5864 Don't continue to its superblock, the block of
5865 per-file symbols. */
5866 if (BLOCK_FUNCTION (block
))
5868 block
= BLOCK_SUPERBLOCK (block
);
5873 struct sal_chain
*tmp_chain
;
5875 /* Count the number of entries. */
5876 for (index
= 0, tmp_chain
= sal_chain
; tmp_chain
;
5877 tmp_chain
= tmp_chain
->next
)
5881 sals
.sals
= (struct symtab_and_line
*)
5882 xmalloc (index
* sizeof (struct symtab_and_line
));
5883 for (index
= 0; sal_chain
; sal_chain
= sal_chain
->next
, index
++)
5884 sals
.sals
[index
] = sal_chain
->sal
;
5891 ep_skip_leading_whitespace (char **s
)
5893 if ((s
== NULL
) || (*s
== NULL
))
5895 while (isspace (**s
))
5899 /* This function examines a string, and attempts to find a token
5900 that might be an event name in the leading characters. If a
5901 possible match is found, a pointer to the last character of
5902 the token is returned. Else, NULL is returned. */
5905 ep_find_event_name_end (char *arg
)
5908 char *event_name_end
= NULL
;
5910 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5914 /* We break out of the loop when we find a token delimiter.
5915 Basically, we're looking for alphanumerics and underscores;
5916 anything else delimites the token. */
5919 if (!isalnum (*s
) && (*s
!= '_'))
5925 return event_name_end
;
5929 /* This function attempts to parse an optional "if <cond>" clause
5930 from the arg string. If one is not found, it returns NULL.
5932 Else, it returns a pointer to the condition string. (It does not
5933 attempt to evaluate the string against a particular block.) And,
5934 it updates arg to point to the first character following the parsed
5935 if clause in the arg string. */
5938 ep_parse_optional_if_clause (char **arg
)
5942 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
5945 /* Skip the "if" keyword. */
5948 /* Skip any extra leading whitespace, and record the start of the
5949 condition string. */
5950 ep_skip_leading_whitespace (arg
);
5953 /* Assume that the condition occupies the remainder of the arg string. */
5954 (*arg
) += strlen (cond_string
);
5959 /* This function attempts to parse an optional filename from the arg
5960 string. If one is not found, it returns NULL.
5962 Else, it returns a pointer to the parsed filename. (This function
5963 makes no attempt to verify that a file of that name exists, or is
5964 accessible.) And, it updates arg to point to the first character
5965 following the parsed filename in the arg string.
5967 Note that clients needing to preserve the returned filename for
5968 future access should copy it to their own buffers. */
5970 ep_parse_optional_filename (char **arg
)
5972 static char filename
[1024];
5977 if ((*arg_p
== '\0') || isspace (*arg_p
))
5995 /* Commands to deal with catching events, such as signals, exceptions,
5996 process start/exit, etc. */
6000 catch_fork
, catch_vfork
6004 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
6005 static void catch_fork_command_1 (catch_fork_kind fork_kind
,
6006 char *arg
, int tempflag
, int from_tty
);
6009 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6012 char *cond_string
= NULL
;
6014 ep_skip_leading_whitespace (&arg
);
6016 /* The allowed syntax is:
6018 catch [v]fork if <cond>
6020 First, check if there's an if clause. */
6021 cond_string
= ep_parse_optional_if_clause (&arg
);
6023 if ((*arg
!= '\0') && !isspace (*arg
))
6024 error ("Junk at end of arguments.");
6026 /* If this target supports it, create a fork or vfork catchpoint
6027 and enable reporting of such events. */
6031 create_fork_event_catchpoint (tempflag
, cond_string
);
6034 create_vfork_event_catchpoint (tempflag
, cond_string
);
6037 error ("unsupported or unknown fork kind; cannot catch it");
6043 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6045 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6047 char *cond_string
= NULL
;
6049 ep_skip_leading_whitespace (&arg
);
6051 /* The allowed syntax is:
6053 catch exec if <cond>
6055 First, check if there's an if clause. */
6056 cond_string
= ep_parse_optional_if_clause (&arg
);
6058 if ((*arg
!= '\0') && !isspace (*arg
))
6059 error ("Junk at end of arguments.");
6061 /* If this target supports it, create an exec catchpoint
6062 and enable reporting of such events. */
6063 create_exec_event_catchpoint (tempflag
, cond_string
);
6067 #if defined(SOLIB_ADD)
6069 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6071 char *dll_pathname
= NULL
;
6072 char *cond_string
= NULL
;
6074 ep_skip_leading_whitespace (&arg
);
6076 /* The allowed syntax is:
6078 catch load if <cond>
6079 catch load <filename>
6080 catch load <filename> if <cond>
6082 The user is not allowed to specify the <filename> after an
6085 We'll ignore the pathological case of a file named "if".
6087 First, check if there's an if clause. If so, then there
6088 cannot be a filename. */
6089 cond_string
= ep_parse_optional_if_clause (&arg
);
6091 /* If there was an if clause, then there cannot be a filename.
6092 Else, there might be a filename and an if clause. */
6093 if (cond_string
== NULL
)
6095 dll_pathname
= ep_parse_optional_filename (&arg
);
6096 ep_skip_leading_whitespace (&arg
);
6097 cond_string
= ep_parse_optional_if_clause (&arg
);
6100 if ((*arg
!= '\0') && !isspace (*arg
))
6101 error ("Junk at end of arguments.");
6103 /* Create a load breakpoint that only triggers when a load of
6104 the specified dll (or any dll, if no pathname was specified)
6106 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6107 dll_pathname
, cond_string
);
6111 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6113 char *dll_pathname
= NULL
;
6114 char *cond_string
= NULL
;
6116 ep_skip_leading_whitespace (&arg
);
6118 /* The allowed syntax is:
6120 catch unload if <cond>
6121 catch unload <filename>
6122 catch unload <filename> if <cond>
6124 The user is not allowed to specify the <filename> after an
6127 We'll ignore the pathological case of a file named "if".
6129 First, check if there's an if clause. If so, then there
6130 cannot be a filename. */
6131 cond_string
= ep_parse_optional_if_clause (&arg
);
6133 /* If there was an if clause, then there cannot be a filename.
6134 Else, there might be a filename and an if clause. */
6135 if (cond_string
== NULL
)
6137 dll_pathname
= ep_parse_optional_filename (&arg
);
6138 ep_skip_leading_whitespace (&arg
);
6139 cond_string
= ep_parse_optional_if_clause (&arg
);
6142 if ((*arg
!= '\0') && !isspace (*arg
))
6143 error ("Junk at end of arguments.");
6145 /* Create an unload breakpoint that only triggers when an unload of
6146 the specified dll (or any dll, if no pathname was specified)
6148 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6149 dll_pathname
, cond_string
);
6151 #endif /* SOLIB_ADD */
6153 /* Commands to deal with catching exceptions. */
6155 /* Set a breakpoint at the specified callback routine for an
6156 exception event callback */
6159 create_exception_catchpoint (int tempflag
, char *cond_string
,
6160 enum exception_event_kind ex_event
,
6161 struct symtab_and_line
*sal
)
6163 struct breakpoint
*b
;
6164 int thread
= -1; /* All threads. */
6167 if (!sal
) /* no exception support? */
6172 case EX_EVENT_THROW
:
6173 bptype
= bp_catch_throw
;
6175 case EX_EVENT_CATCH
:
6176 bptype
= bp_catch_catch
;
6178 default: /* error condition */
6179 error ("Internal error -- invalid catchpoint kind");
6182 b
= set_raw_breakpoint (*sal
, bptype
);
6183 set_breakpoint_count (breakpoint_count
+ 1);
6184 b
->number
= breakpoint_count
;
6186 b
->cond_string
= (cond_string
== NULL
) ?
6187 NULL
: savestring (cond_string
, strlen (cond_string
));
6189 b
->addr_string
= NULL
;
6190 b
->enable_state
= bp_enabled
;
6191 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6195 /* Deal with "catch catch" and "catch throw" commands */
6198 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6199 int tempflag
, int from_tty
)
6201 char *cond_string
= NULL
;
6202 struct symtab_and_line
*sal
= NULL
;
6204 ep_skip_leading_whitespace (&arg
);
6206 cond_string
= ep_parse_optional_if_clause (&arg
);
6208 if ((*arg
!= '\0') && !isspace (*arg
))
6209 error ("Junk at end of arguments.");
6211 if ((ex_event
!= EX_EVENT_THROW
) &&
6212 (ex_event
!= EX_EVENT_CATCH
))
6213 error ("Unsupported or unknown exception event; cannot catch it");
6215 /* See if we can find a callback routine */
6216 sal
= target_enable_exception_callback (ex_event
, 1);
6220 /* We have callbacks from the runtime system for exceptions.
6221 Set a breakpoint on the sal found, if no errors */
6222 if (sal
!= (struct symtab_and_line
*) -1)
6223 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6225 return; /* something went wrong with setting up callbacks */
6229 /* No callbacks from runtime system for exceptions.
6230 Try GNU C++ exception breakpoints using labels in debug info. */
6231 if (ex_event
== EX_EVENT_CATCH
)
6233 handle_gnu_4_16_catch_command (arg
, tempflag
, from_tty
);
6235 else if (ex_event
== EX_EVENT_THROW
)
6237 /* Set a breakpoint on __raise_exception () */
6239 warning ("Unsupported with this platform/compiler combination.");
6240 warning ("Perhaps you can achieve the effect you want by setting");
6241 warning ("a breakpoint on __raise_exception().");
6246 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6247 inside a catch_errors */
6250 cover_target_enable_exception_callback (void *arg
)
6252 args_for_catchpoint_enable
*args
= arg
;
6253 struct symtab_and_line
*sal
;
6254 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6257 else if (sal
== (struct symtab_and_line
*) -1)
6260 return 1; /*is valid */
6265 /* This is the original v.4.16 and earlier version of the
6266 catch_command_1() function. Now that other flavours of "catch"
6267 have been introduced, and since exception handling can be handled
6268 in other ways (through target ops) also, this is used only for the
6269 GNU C++ exception handling system.
6270 Note: Only the "catch" flavour of GDB 4.16 is handled here. The
6271 "catch NAME" is now no longer allowed in catch_command_1(). Also,
6272 there was no code in GDB 4.16 for "catch throw".
6274 Called from catch_exception_command_1 () */
6278 handle_gnu_4_16_catch_command (char *arg
, int tempflag
, int from_tty
)
6280 /* First, translate ARG into something we can deal with in terms
6283 struct symtabs_and_lines sals
;
6284 struct symtab_and_line sal
;
6285 register struct expression
*cond
= 0;
6286 register struct breakpoint
*b
;
6290 init_sal (&sal
); /* initialize to zeroes */
6292 /* If no arg given, or if first arg is 'if ', all active catch clauses
6293 are breakpointed. */
6295 if (!arg
|| (arg
[0] == 'i' && arg
[1] == 'f'
6296 && (arg
[2] == ' ' || arg
[2] == '\t')))
6298 /* Grab all active catch clauses. */
6299 sals
= get_catch_sals (0);
6303 /* Grab selected catch clauses. */
6304 error ("catch NAME not implemented");
6307 /* Not sure why this code has been disabled. I'm leaving
6308 it disabled. We can never come here now anyway
6309 since we don't allow the "catch NAME" syntax.
6312 /* This isn't used; I don't know what it was for. */
6313 sals
= map_catch_names (arg
, catch_breakpoint
);
6321 for (i
= 0; i
< sals
.nelts
; i
++)
6323 resolve_sal_pc (&sals
.sals
[i
]);
6327 if (arg
[0] == 'i' && arg
[1] == 'f'
6328 && (arg
[2] == ' ' || arg
[2] == '\t'))
6329 cond
= parse_exp_1 ((arg
+= 2, &arg
),
6330 block_for_pc (sals
.sals
[i
].pc
), 0);
6332 error ("Junk at end of arguments.");
6337 for (i
= 0; i
< sals
.nelts
; i
++)
6342 describe_other_breakpoints (sal
.pc
, sal
.section
);
6344 /* Important -- this is an ordinary breakpoint. For platforms
6345 with callback support for exceptions,
6346 create_exception_catchpoint() will create special bp types
6347 (bp_catch_catch and bp_catch_throw), and there is code in
6348 insert_breakpoints() and elsewhere that depends on that. */
6349 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6350 set_breakpoint_count (breakpoint_count
+ 1);
6351 b
->number
= breakpoint_count
;
6354 b
->enable_state
= bp_enabled
;
6355 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6362 warning ("Multiple breakpoints were set.");
6363 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
6369 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6372 /* The first argument may be an event name, such as "start" or "load".
6373 If so, then handle it as such. If it doesn't match an event name,
6374 then attempt to interpret it as an exception name. (This latter is
6375 the v4.16-and-earlier GDB meaning of the "catch" command.)
6377 First, try to find the bounds of what might be an event name. */
6378 char *arg1_start
= arg
;
6382 if (arg1_start
== NULL
)
6384 /* Old behaviour was to use pre-v-4.16 syntax */
6385 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6387 /* Now, this is not allowed */
6388 error ("Catch requires an event name.");
6391 arg1_end
= ep_find_event_name_end (arg1_start
);
6392 if (arg1_end
== NULL
)
6393 error ("catch requires an event");
6394 arg1_length
= arg1_end
+ 1 - arg1_start
;
6396 /* Try to match what we found against known event names. */
6397 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6399 error ("Catch of signal not yet implemented");
6401 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6403 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6404 tempflag
, from_tty
);
6406 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6408 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6409 tempflag
, from_tty
);
6411 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6413 error ("Catch of thread_start not yet implemented");
6415 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6417 error ("Catch of thread_exit not yet implemented");
6419 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6421 error ("Catch of thread_join not yet implemented");
6423 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6425 error ("Catch of start not yet implemented");
6427 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6429 error ("Catch of exit not yet implemented");
6431 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6433 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6434 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6436 error ("Catch of fork not yet implemented");
6439 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6441 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6442 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6444 error ("Catch of vfork not yet implemented");
6447 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6449 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6450 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6452 error ("Catch of exec not yet implemented");
6455 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6457 #if defined(SOLIB_ADD)
6458 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6460 error ("Catch of load not implemented");
6463 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6465 #if defined(SOLIB_ADD)
6466 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6468 error ("Catch of load not implemented");
6471 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6473 error ("Catch of stop not yet implemented");
6476 /* This doesn't appear to be an event name */
6480 /* Pre-v.4.16 behaviour was to treat the argument
6481 as the name of an exception */
6482 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6483 /* Now this is not allowed */
6484 error ("Unknown event kind specified for catch");
6489 /* Used by the gui, could be made a worker for other things. */
6492 set_breakpoint_sal (struct symtab_and_line sal
)
6494 struct breakpoint
*b
;
6495 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6496 set_breakpoint_count (breakpoint_count
+ 1);
6497 b
->number
= breakpoint_count
;
6504 /* These aren't used; I don't know what they were for. */
6505 /* Disable breakpoints on all catch clauses described in ARGS. */
6507 disable_catch (char *args
)
6509 /* Map the disable command to catch clauses described in ARGS. */
6512 /* Enable breakpoints on all catch clauses described in ARGS. */
6514 enable_catch (char *args
)
6516 /* Map the disable command to catch clauses described in ARGS. */
6519 /* Delete breakpoints on all catch clauses in the active scope. */
6521 delete_catch (char *args
)
6523 /* Map the delete command to catch clauses described in ARGS. */
6528 catch_command (char *arg
, int from_tty
)
6530 catch_command_1 (arg
, 0, from_tty
);
6535 tcatch_command (char *arg
, int from_tty
)
6537 catch_command_1 (arg
, 1, from_tty
);
6540 /* Delete breakpoints by address or line. */
6543 clear_command (char *arg
, int from_tty
)
6545 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6547 struct symtabs_and_lines sals
;
6548 struct symtab_and_line sal
;
6553 sals
= decode_line_spec (arg
, 1);
6558 sals
.sals
= (struct symtab_and_line
*)
6559 xmalloc (sizeof (struct symtab_and_line
));
6560 make_cleanup (xfree
, sals
.sals
);
6561 init_sal (&sal
); /* initialize to zeroes */
6562 sal
.line
= default_breakpoint_line
;
6563 sal
.symtab
= default_breakpoint_symtab
;
6564 sal
.pc
= default_breakpoint_address
;
6565 if (sal
.symtab
== 0)
6566 error ("No source file specified.");
6574 /* For each line spec given, delete bps which correspond
6575 to it. Do it in two passes, solely to preserve the current
6576 behavior that from_tty is forced true if we delete more than
6580 for (i
= 0; i
< sals
.nelts
; i
++)
6582 /* If exact pc given, clear bpts at that pc.
6583 If line given (pc == 0), clear all bpts on specified line.
6584 If defaulting, clear all bpts on default line
6587 defaulting sal.pc != 0 tests to do
6592 1 0 <can't happen> */
6597 /* Find all matching breakpoints, remove them from the
6598 breakpoint chain, and add them to the 'found' chain. */
6599 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6601 /* Are we going to delete b? */
6602 if (b
->type
!= bp_none
6603 && b
->type
!= bp_watchpoint
6604 && b
->type
!= bp_hardware_watchpoint
6605 && b
->type
!= bp_read_watchpoint
6606 && b
->type
!= bp_access_watchpoint
6607 /* Not if b is a watchpoint of any sort... */
6608 && (((sal
.pc
&& (b
->address
== sal
.pc
))
6609 && (!section_is_overlay (b
->section
)
6610 || b
->section
== sal
.section
))
6611 /* Yes, if sal.pc matches b (modulo overlays). */
6612 || ((default_match
|| (0 == sal
.pc
))
6613 && b
->source_file
!= NULL
6614 && sal
.symtab
!= NULL
6615 && STREQ (b
->source_file
, sal
.symtab
->filename
)
6616 && b
->line_number
== sal
.line
)))
6617 /* Yes, if sal source file and line matches b. */
6619 /* Remove it from breakpoint_chain... */
6620 if (b
== breakpoint_chain
)
6622 /* b is at the head of the list */
6623 breakpoint_chain
= b
->next
;
6627 prev
->next
= b
->next
;
6629 /* And add it to 'found' chain. */
6635 /* Keep b, and keep a pointer to it. */
6640 /* Now go thru the 'found' chain and delete them. */
6644 error ("No breakpoint at %s.", arg
);
6646 error ("No breakpoint at this line.");
6650 from_tty
= 1; /* Always report if deleted more than one */
6652 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6653 breakpoints_changed ();
6657 printf_unfiltered ("%d ", found
->number
);
6659 delete_breakpoint (found
);
6663 putchar_unfiltered ('\n');
6666 /* Delete breakpoint in BS if they are `delete' breakpoints and
6667 all breakpoints that are marked for deletion, whether hit or not.
6668 This is called after any breakpoint is hit, or after errors. */
6671 breakpoint_auto_delete (bpstat bs
)
6673 struct breakpoint
*b
, *temp
;
6675 for (; bs
; bs
= bs
->next
)
6676 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6678 delete_breakpoint (bs
->breakpoint_at
);
6680 ALL_BREAKPOINTS_SAFE (b
, temp
)
6682 if (b
->disposition
== disp_del_at_next_stop
)
6683 delete_breakpoint (b
);
6687 /* Delete a breakpoint and clean up all traces of it in the data
6691 delete_breakpoint (struct breakpoint
*bpt
)
6693 register struct breakpoint
*b
;
6697 error ("Internal error (attempted to delete a NULL breakpoint)");
6700 /* Has this bp already been deleted? This can happen because multiple
6701 lists can hold pointers to bp's. bpstat lists are especial culprits.
6703 One example of this happening is a watchpoint's scope bp. When the
6704 scope bp triggers, we notice that the watchpoint is out of scope, and
6705 delete it. We also delete its scope bp. But the scope bp is marked
6706 "auto-deleting", and is already on a bpstat. That bpstat is then
6707 checked for auto-deleting bp's, which are deleted.
6709 A real solution to this problem might involve reference counts in bp's,
6710 and/or giving them pointers back to their referencing bpstat's, and
6711 teaching delete_breakpoint to only free a bp's storage when no more
6712 references were extent. A cheaper bandaid was chosen. */
6713 if (bpt
->type
== bp_none
)
6716 if (delete_breakpoint_hook
)
6717 delete_breakpoint_hook (bpt
);
6718 breakpoint_delete_event (bpt
->number
);
6721 remove_breakpoint (bpt
, mark_inserted
);
6723 if (breakpoint_chain
== bpt
)
6724 breakpoint_chain
= bpt
->next
;
6726 /* If we have callback-style exception catchpoints, don't go through
6727 the adjustments to the C++ runtime library etc. if the inferior
6728 isn't actually running. target_enable_exception_callback for a
6729 null target ops vector gives an undesirable error message, so we
6730 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6731 exceptions are supported in this way, it's OK for now. FIXME */
6732 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6734 static char message1
[] = "Error in deleting catchpoint %d:\n";
6735 static char message
[sizeof (message1
) + 30];
6736 args_for_catchpoint_enable args
;
6738 /* Format possible error msg */
6739 sprintf (message
, message1
, bpt
->number
);
6740 args
.kind
= bpt
->type
== bp_catch_catch
?
6741 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6743 catch_errors (cover_target_enable_exception_callback
, &args
,
6744 message
, RETURN_MASK_ALL
);
6751 b
->next
= bpt
->next
;
6755 check_duplicates (bpt
);
6756 /* If this breakpoint was inserted, and there is another breakpoint
6757 at the same address, we need to insert the other breakpoint. */
6759 && bpt
->type
!= bp_hardware_watchpoint
6760 && bpt
->type
!= bp_read_watchpoint
6761 && bpt
->type
!= bp_access_watchpoint
6762 && bpt
->type
!= bp_catch_fork
6763 && bpt
->type
!= bp_catch_vfork
6764 && bpt
->type
!= bp_catch_exec
)
6767 if (b
->address
== bpt
->address
6768 && b
->section
== bpt
->section
6770 && b
->enable_state
!= bp_disabled
6771 && b
->enable_state
!= bp_shlib_disabled
6772 && b
->enable_state
!= bp_call_disabled
)
6776 /* We should never reach this point if there is a permanent
6777 breakpoint at the same address as the one being deleted.
6778 If there is a permanent breakpoint somewhere, it should
6779 always be the only one inserted. */
6780 if (b
->enable_state
== bp_permanent
)
6781 internal_error (__FILE__
, __LINE__
,
6782 "another breakpoint was inserted on top of "
6783 "a permanent breakpoint");
6785 if (b
->type
== bp_hardware_breakpoint
)
6786 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
6788 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
6790 /* If there was an error in the insert, print a message, then stop execution. */
6793 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6794 make_cleanup_ui_file_delete (tmp_error_stream
);
6797 if (b
->type
== bp_hardware_breakpoint
)
6799 fprintf_unfiltered (tmp_error_stream
,
6800 "Cannot insert hardware breakpoint %d.\n"
6801 "You may have requested too many hardware breakpoints.\n",
6806 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6807 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6808 print_address_numeric (b
->address
, 1, tmp_error_stream
);
6809 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6810 safe_strerror (val
));
6813 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6814 target_terminal_ours_for_output ();
6815 error_stream(tmp_error_stream
);
6822 free_command_lines (&bpt
->commands
);
6825 if (bpt
->cond_string
!= NULL
)
6826 xfree (bpt
->cond_string
);
6827 if (bpt
->addr_string
!= NULL
)
6828 xfree (bpt
->addr_string
);
6829 if (bpt
->exp
!= NULL
)
6831 if (bpt
->exp_string
!= NULL
)
6832 xfree (bpt
->exp_string
);
6833 if (bpt
->val
!= NULL
)
6834 value_free (bpt
->val
);
6835 if (bpt
->source_file
!= NULL
)
6836 xfree (bpt
->source_file
);
6837 if (bpt
->dll_pathname
!= NULL
)
6838 xfree (bpt
->dll_pathname
);
6839 if (bpt
->triggered_dll_pathname
!= NULL
)
6840 xfree (bpt
->triggered_dll_pathname
);
6841 if (bpt
->exec_pathname
!= NULL
)
6842 xfree (bpt
->exec_pathname
);
6844 /* Be sure no bpstat's are pointing at it after it's been freed. */
6845 /* FIXME, how can we find all bpstat's?
6846 We just check stop_bpstat for now. */
6847 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6848 if (bs
->breakpoint_at
== bpt
)
6850 bs
->breakpoint_at
= NULL
;
6852 /* bs->commands will be freed later. */
6854 /* On the chance that someone will soon try again to delete this same
6855 bp, we mark it as deleted before freeing its storage. */
6856 bpt
->type
= bp_none
;
6862 do_delete_breakpoint_cleanup (void *b
)
6864 delete_breakpoint (b
);
6868 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6870 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6874 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6876 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6880 delete_command (char *arg
, int from_tty
)
6882 struct breakpoint
*b
, *temp
;
6888 int breaks_to_delete
= 0;
6890 /* Delete all breakpoints if no argument.
6891 Do not delete internal or call-dummy breakpoints, these
6892 have to be deleted with an explicit breakpoint number argument. */
6895 if (b
->type
!= bp_call_dummy
&&
6896 b
->type
!= bp_shlib_event
&&
6897 b
->type
!= bp_thread_event
&&
6898 b
->type
!= bp_overlay_event
&&
6900 breaks_to_delete
= 1;
6903 /* Ask user only if there are some breakpoints to delete. */
6905 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
6907 ALL_BREAKPOINTS_SAFE (b
, temp
)
6909 if (b
->type
!= bp_call_dummy
&&
6910 b
->type
!= bp_shlib_event
&&
6911 b
->type
!= bp_thread_event
&&
6912 b
->type
!= bp_overlay_event
&&
6914 delete_breakpoint (b
);
6919 map_breakpoint_numbers (arg
, delete_breakpoint
);
6922 /* Reset a breakpoint given it's struct breakpoint * BINT.
6923 The value we return ends up being the return value from catch_errors.
6924 Unused in this case. */
6927 breakpoint_re_set_one (void *bint
)
6929 /* get past catch_errs */
6930 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6933 struct symtabs_and_lines sals
;
6935 enum enable_state save_enable
;
6940 warning ("attempted to reset apparently deleted breakpoint #%d?",
6944 case bp_hardware_breakpoint
:
6946 case bp_catch_unload
:
6947 if (b
->addr_string
== NULL
)
6949 /* Anything without a string can't be re-set. */
6950 delete_breakpoint (b
);
6953 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6955 ``And a hack it is, although Apple's Darwin version of GDB
6956 contains an almost identical hack to implement a "future
6957 break" command. It seems to work in many real world cases,
6958 but it is easy to come up with a test case where the patch
6959 doesn't help at all.''
6961 ``It seems that the way GDB implements breakpoints - in -
6962 shared - libraries was designed for a.out shared library
6963 systems (SunOS 4) where shared libraries were loaded at a
6964 fixed address in memory. Since ELF shared libraries can (and
6965 will) be loaded at any address in memory, things break.
6966 Fixing this is not trivial. Therefore, I'm not sure whether
6967 we should add this hack to the branch only. I cannot
6968 guarantee that things will be fixed on the trunk in the near
6971 In case we have a problem, disable this breakpoint. We'll
6972 restore its status if we succeed. Don't disable a
6973 shlib_disabled breakpoint though. There's a fair chance we
6974 can't re-set it if the shared library it's in hasn't been
6976 save_enable
= b
->enable_state
;
6977 if (b
->enable_state
!= bp_shlib_disabled
)
6978 b
->enable_state
= bp_disabled
;
6980 set_language (b
->language
);
6981 input_radix
= b
->input_radix
;
6983 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
);
6984 for (i
= 0; i
< sals
.nelts
; i
++)
6986 resolve_sal_pc (&sals
.sals
[i
]);
6988 /* Reparse conditions, they might contain references to the
6990 if (b
->cond_string
!= NULL
)
6995 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
6998 /* We need to re-set the breakpoint if the address changes... */
6999 if (b
->address
!= sals
.sals
[i
].pc
7000 /* ...or new and old breakpoints both have source files, and
7001 the source file name or the line number changes... */
7002 || (b
->source_file
!= NULL
7003 && sals
.sals
[i
].symtab
!= NULL
7004 && (!STREQ (b
->source_file
, sals
.sals
[i
].symtab
->filename
)
7005 || b
->line_number
!= sals
.sals
[i
].line
)
7007 /* ...or we switch between having a source file and not having
7009 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
7012 if (b
->source_file
!= NULL
)
7013 xfree (b
->source_file
);
7014 if (sals
.sals
[i
].symtab
== NULL
)
7015 b
->source_file
= NULL
;
7018 savestring (sals
.sals
[i
].symtab
->filename
,
7019 strlen (sals
.sals
[i
].symtab
->filename
));
7020 b
->line_number
= sals
.sals
[i
].line
;
7021 b
->address
= sals
.sals
[i
].pc
;
7023 /* Used to check for duplicates here, but that can
7024 cause trouble, as it doesn't check for disabled
7029 /* Might be better to do this just once per breakpoint_re_set,
7030 rather than once for every breakpoint. */
7031 breakpoints_changed ();
7033 b
->section
= sals
.sals
[i
].section
;
7034 b
->enable_state
= save_enable
; /* Restore it, this worked. */
7037 /* Now that this is re-enabled, check_duplicates
7039 check_duplicates (b
);
7046 case bp_hardware_watchpoint
:
7047 case bp_read_watchpoint
:
7048 case bp_access_watchpoint
:
7049 innermost_block
= NULL
;
7050 /* The issue arises of what context to evaluate this in. The
7051 same one as when it was set, but what does that mean when
7052 symbols have been re-read? We could save the filename and
7053 functionname, but if the context is more local than that, the
7054 best we could do would be something like how many levels deep
7055 and which index at that particular level, but that's going to
7056 be less stable than filenames or function names. */
7058 /* So for now, just use a global context. */
7061 b
->exp
= parse_expression (b
->exp_string
);
7062 b
->exp_valid_block
= innermost_block
;
7063 mark
= value_mark ();
7065 value_free (b
->val
);
7066 b
->val
= evaluate_expression (b
->exp
);
7067 release_value (b
->val
);
7068 if (VALUE_LAZY (b
->val
) && b
->enable_state
== bp_enabled
)
7069 value_fetch_lazy (b
->val
);
7071 if (b
->cond_string
!= NULL
)
7076 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7078 if (b
->enable_state
== bp_enabled
)
7080 value_free_to_mark (mark
);
7082 case bp_catch_catch
:
7083 case bp_catch_throw
:
7085 /* We needn't really do anything to reset these, since the mask
7086 that requests them is unaffected by e.g., new libraries being
7089 case bp_catch_vfork
:
7094 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
7096 /* Delete longjmp and overlay event breakpoints; they will be
7097 reset later by breakpoint_re_set. */
7099 case bp_longjmp_resume
:
7100 case bp_overlay_event
:
7101 delete_breakpoint (b
);
7104 /* This breakpoint is special, it's set up when the inferior
7105 starts and we really don't want to touch it. */
7106 case bp_shlib_event
:
7108 /* Like bp_shlib_event, this breakpoint type is special.
7109 Once it is set up, we do not want to touch it. */
7110 case bp_thread_event
:
7112 /* Keep temporary breakpoints, which can be encountered when we step
7113 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7114 Otherwise these should have been blown away via the cleanup chain
7115 or by breakpoint_init_inferior when we rerun the executable. */
7118 case bp_watchpoint_scope
:
7120 case bp_step_resume
:
7127 /* Re-set all breakpoints after symbols have been re-loaded. */
7129 breakpoint_re_set (void)
7131 struct breakpoint
*b
, *temp
;
7132 enum language save_language
;
7133 int save_input_radix
;
7134 static char message1
[] = "Error in re-setting breakpoint %d:\n";
7135 char message
[sizeof (message1
) + 30 /* slop */ ];
7137 save_language
= current_language
->la_language
;
7138 save_input_radix
= input_radix
;
7139 ALL_BREAKPOINTS_SAFE (b
, temp
)
7141 /* Format possible error msg */
7142 sprintf (message
, message1
, b
->number
);
7143 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7145 set_language (save_language
);
7146 input_radix
= save_input_radix
;
7148 if (GET_LONGJMP_TARGET_P ())
7150 create_longjmp_breakpoint ("longjmp");
7151 create_longjmp_breakpoint ("_longjmp");
7152 create_longjmp_breakpoint ("siglongjmp");
7153 create_longjmp_breakpoint ("_siglongjmp");
7154 create_longjmp_breakpoint (NULL
);
7157 create_overlay_event_breakpoint ("_ovly_debug_event");
7160 /* Reset the thread number of this breakpoint:
7162 - If the breakpoint is for all threads, leave it as-is.
7163 - Else, reset it to the current thread for inferior_ptid. */
7165 breakpoint_re_set_thread (struct breakpoint
*b
)
7167 if (b
->thread
!= -1)
7169 if (in_thread_list (inferior_ptid
))
7170 b
->thread
= pid_to_thread_id (inferior_ptid
);
7174 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7175 If from_tty is nonzero, it prints a message to that effect,
7176 which ends with a period (no newline). */
7179 set_ignore_count (int bptnum
, int count
, int from_tty
)
7181 register struct breakpoint
*b
;
7187 if (b
->number
== bptnum
)
7189 b
->ignore_count
= count
;
7193 printf_filtered ("Will stop next time breakpoint %d is reached.",
7195 else if (count
== 1)
7196 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7199 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7202 breakpoints_changed ();
7203 breakpoint_modify_event (b
->number
);
7207 error ("No breakpoint number %d.", bptnum
);
7210 /* Clear the ignore counts of all breakpoints. */
7212 breakpoint_clear_ignore_counts (void)
7214 struct breakpoint
*b
;
7217 b
->ignore_count
= 0;
7220 /* Command to set ignore-count of breakpoint N to COUNT. */
7223 ignore_command (char *args
, int from_tty
)
7229 error_no_arg ("a breakpoint number");
7231 num
= get_number (&p
);
7233 error ("bad breakpoint number: '%s'", args
);
7235 error ("Second argument (specified ignore-count) is missing.");
7237 set_ignore_count (num
,
7238 longest_to_int (value_as_long (parse_and_eval (p
))),
7241 printf_filtered ("\n");
7244 /* Call FUNCTION on each of the breakpoints
7245 whose numbers are given in ARGS. */
7248 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7250 register char *p
= args
;
7253 register struct breakpoint
*b
, *tmp
;
7257 error_no_arg ("one or more breakpoint numbers");
7264 num
= get_number_or_range (&p1
);
7267 warning ("bad breakpoint number at or near '%s'", p
);
7271 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7272 if (b
->number
== num
)
7274 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7277 if (related_breakpoint
)
7278 function (related_breakpoint
);
7282 printf_unfiltered ("No breakpoint number %d.\n", num
);
7288 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7289 If from_tty is nonzero, it prints a message to that effect,
7290 which ends with a period (no newline). */
7293 disable_breakpoint (struct breakpoint
*bpt
)
7295 /* Never disable a watchpoint scope breakpoint; we want to
7296 hit them when we leave scope so we can delete both the
7297 watchpoint and its scope breakpoint at that time. */
7298 if (bpt
->type
== bp_watchpoint_scope
)
7301 /* You can't disable permanent breakpoints. */
7302 if (bpt
->enable_state
== bp_permanent
)
7305 bpt
->enable_state
= bp_disabled
;
7307 check_duplicates (bpt
);
7309 if (modify_breakpoint_hook
)
7310 modify_breakpoint_hook (bpt
);
7311 breakpoint_modify_event (bpt
->number
);
7316 disable_command (char *args
, int from_tty
)
7318 register struct breakpoint
*bpt
;
7320 ALL_BREAKPOINTS (bpt
)
7324 warning ("attempted to disable apparently deleted breakpoint #%d?",
7329 case bp_catch_unload
:
7331 case bp_catch_vfork
:
7333 case bp_catch_catch
:
7334 case bp_catch_throw
:
7335 case bp_hardware_breakpoint
:
7337 case bp_hardware_watchpoint
:
7338 case bp_read_watchpoint
:
7339 case bp_access_watchpoint
:
7340 disable_breakpoint (bpt
);
7345 map_breakpoint_numbers (args
, disable_breakpoint
);
7349 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7351 struct frame_info
*save_selected_frame
= NULL
;
7352 int save_selected_frame_level
= -1;
7353 int target_resources_ok
, other_type_used
;
7356 if (bpt
->type
== bp_hardware_breakpoint
)
7359 i
= hw_breakpoint_used_count ();
7360 target_resources_ok
=
7361 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7363 if (target_resources_ok
== 0)
7364 error ("No hardware breakpoint support in the target.");
7365 else if (target_resources_ok
< 0)
7366 error ("Hardware breakpoints used exceeds limit.");
7369 if (bpt
->enable_state
!= bp_permanent
)
7370 bpt
->enable_state
= bp_enabled
;
7371 bpt
->disposition
= disposition
;
7372 check_duplicates (bpt
);
7373 breakpoints_changed ();
7375 if (bpt
->type
== bp_watchpoint
||
7376 bpt
->type
== bp_hardware_watchpoint
||
7377 bpt
->type
== bp_read_watchpoint
||
7378 bpt
->type
== bp_access_watchpoint
)
7380 if (bpt
->exp_valid_block
!= NULL
)
7382 struct frame_info
*fr
=
7383 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7387 Cannot enable watchpoint %d because the block in which its expression\n\
7388 is valid is not currently in scope.\n", bpt
->number
);
7389 bpt
->enable_state
= bp_disabled
;
7393 save_selected_frame
= deprecated_selected_frame
;
7394 save_selected_frame_level
= frame_relative_level (deprecated_selected_frame
);
7398 value_free (bpt
->val
);
7399 mark
= value_mark ();
7400 bpt
->val
= evaluate_expression (bpt
->exp
);
7401 release_value (bpt
->val
);
7402 if (VALUE_LAZY (bpt
->val
))
7403 value_fetch_lazy (bpt
->val
);
7405 if (bpt
->type
== bp_hardware_watchpoint
||
7406 bpt
->type
== bp_read_watchpoint
||
7407 bpt
->type
== bp_access_watchpoint
)
7409 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7410 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7412 /* Hack around 'unused var' error for some targets here */
7414 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7415 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7416 /* we can consider of type is bp_hardware_watchpoint, convert to
7417 bp_watchpoint in the following condition */
7418 if (target_resources_ok
< 0)
7421 Cannot enable watchpoint %d because target watch resources\n\
7422 have been allocated for other watchpoints.\n", bpt
->number
);
7423 bpt
->enable_state
= bp_disabled
;
7424 value_free_to_mark (mark
);
7429 if (save_selected_frame_level
>= 0)
7430 select_frame (save_selected_frame
);
7431 value_free_to_mark (mark
);
7433 if (modify_breakpoint_hook
)
7434 modify_breakpoint_hook (bpt
);
7435 breakpoint_modify_event (bpt
->number
);
7439 enable_breakpoint (struct breakpoint
*bpt
)
7441 do_enable_breakpoint (bpt
, bpt
->disposition
);
7444 /* The enable command enables the specified breakpoints (or all defined
7445 breakpoints) so they once again become (or continue to be) effective
7446 in stopping the inferior. */
7450 enable_command (char *args
, int from_tty
)
7452 register struct breakpoint
*bpt
;
7454 ALL_BREAKPOINTS (bpt
)
7458 warning ("attempted to enable apparently deleted breakpoint #%d?",
7463 case bp_catch_unload
:
7465 case bp_catch_vfork
:
7467 case bp_catch_catch
:
7468 case bp_catch_throw
:
7469 case bp_hardware_breakpoint
:
7471 case bp_hardware_watchpoint
:
7472 case bp_read_watchpoint
:
7473 case bp_access_watchpoint
:
7474 enable_breakpoint (bpt
);
7479 map_breakpoint_numbers (args
, enable_breakpoint
);
7483 enable_once_breakpoint (struct breakpoint
*bpt
)
7485 do_enable_breakpoint (bpt
, disp_disable
);
7490 enable_once_command (char *args
, int from_tty
)
7492 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7496 enable_delete_breakpoint (struct breakpoint
*bpt
)
7498 do_enable_breakpoint (bpt
, disp_del
);
7503 enable_delete_command (char *args
, int from_tty
)
7505 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7508 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7510 struct symtabs_and_lines
7511 decode_line_spec_1 (char *string
, int funfirstline
)
7513 struct symtabs_and_lines sals
;
7515 error ("Empty line specification.");
7516 if (default_breakpoint_valid
)
7517 sals
= decode_line_1 (&string
, funfirstline
,
7518 default_breakpoint_symtab
,
7519 default_breakpoint_line
,
7522 sals
= decode_line_1 (&string
, funfirstline
,
7523 (struct symtab
*) NULL
, 0, (char ***) NULL
);
7525 error ("Junk at end of line specification: %s", string
);
7530 _initialize_breakpoint (void)
7532 struct cmd_list_element
*c
;
7534 breakpoint_chain
= 0;
7535 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7536 before a breakpoint is set. */
7537 breakpoint_count
= 0;
7539 add_com ("ignore", class_breakpoint
, ignore_command
,
7540 "Set ignore-count of breakpoint number N to COUNT.\n\
7541 Usage is `ignore N COUNT'.");
7543 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7545 add_com ("commands", class_breakpoint
, commands_command
,
7546 "Set commands to be executed when a breakpoint is hit.\n\
7547 Give breakpoint number as argument after \"commands\".\n\
7548 With no argument, the targeted breakpoint is the last one set.\n\
7549 The commands themselves follow starting on the next line.\n\
7550 Type a line containing \"end\" to indicate the end of them.\n\
7551 Give \"silent\" as the first line to make the breakpoint silent;\n\
7552 then no output is printed when it is hit, except what the commands print.");
7554 add_com ("condition", class_breakpoint
, condition_command
,
7555 "Specify breakpoint number N to break only if COND is true.\n\
7556 Usage is `condition N COND', where N is an integer and COND is an\n\
7557 expression to be evaluated whenever breakpoint N is reached.");
7559 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7560 "Set a temporary breakpoint. Args like \"break\" command.\n\
7561 Like \"break\" except the breakpoint is only temporary,\n\
7562 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7563 by using \"enable delete\" on the breakpoint number.");
7564 set_cmd_completer (c
, location_completer
);
7566 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7567 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7568 Like \"break\" except the breakpoint requires hardware support,\n\
7569 some target hardware may not have this support.");
7570 set_cmd_completer (c
, location_completer
);
7572 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7573 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7574 Like \"hbreak\" except the breakpoint is only temporary,\n\
7575 so it will be deleted when hit.");
7576 set_cmd_completer (c
, location_completer
);
7578 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7579 "Enable some breakpoints.\n\
7580 Give breakpoint numbers (separated by spaces) as arguments.\n\
7581 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7582 This is used to cancel the effect of the \"disable\" command.\n\
7583 With a subcommand you can enable temporarily.",
7584 &enablelist
, "enable ", 1, &cmdlist
);
7586 add_com ("ab", class_breakpoint
, enable_command
,
7587 "Enable some breakpoints.\n\
7588 Give breakpoint numbers (separated by spaces) as arguments.\n\
7589 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7590 This is used to cancel the effect of the \"disable\" command.\n\
7591 With a subcommand you can enable temporarily.");
7593 add_com_alias ("en", "enable", class_breakpoint
, 1);
7595 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7596 "Enable some breakpoints.\n\
7597 Give breakpoint numbers (separated by spaces) as arguments.\n\
7598 This is used to cancel the effect of the \"disable\" command.\n\
7599 May be abbreviated to simply \"enable\".\n",
7600 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7602 add_cmd ("once", no_class
, enable_once_command
,
7603 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7604 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7607 add_cmd ("delete", no_class
, enable_delete_command
,
7608 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7609 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7612 add_cmd ("delete", no_class
, enable_delete_command
,
7613 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7614 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7617 add_cmd ("once", no_class
, enable_once_command
,
7618 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7619 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7622 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7623 "Disable some breakpoints.\n\
7624 Arguments are breakpoint numbers with spaces in between.\n\
7625 To disable all breakpoints, give no argument.\n\
7626 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7627 &disablelist
, "disable ", 1, &cmdlist
);
7628 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7629 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7631 add_com ("sb", class_breakpoint
, disable_command
,
7632 "Disable some breakpoints.\n\
7633 Arguments are breakpoint numbers with spaces in between.\n\
7634 To disable all breakpoints, give no argument.\n\
7635 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7637 add_cmd ("breakpoints", class_alias
, disable_command
,
7638 "Disable some breakpoints.\n\
7639 Arguments are breakpoint numbers with spaces in between.\n\
7640 To disable all breakpoints, give no argument.\n\
7641 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7642 This command may be abbreviated \"disable\".",
7645 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7646 "Delete some breakpoints or auto-display expressions.\n\
7647 Arguments are breakpoint numbers with spaces in between.\n\
7648 To delete all breakpoints, give no argument.\n\
7650 Also a prefix command for deletion of other GDB objects.\n\
7651 The \"unset\" command is also an alias for \"delete\".",
7652 &deletelist
, "delete ", 1, &cmdlist
);
7653 add_com_alias ("d", "delete", class_breakpoint
, 1);
7655 add_com ("db", class_breakpoint
, delete_command
,
7656 "Delete some breakpoints.\n\
7657 Arguments are breakpoint numbers with spaces in between.\n\
7658 To delete all breakpoints, give no argument.\n");
7660 add_cmd ("breakpoints", class_alias
, delete_command
,
7661 "Delete some breakpoints or auto-display expressions.\n\
7662 Arguments are breakpoint numbers with spaces in between.\n\
7663 To delete all breakpoints, give no argument.\n\
7664 This command may be abbreviated \"delete\".",
7667 add_com ("clear", class_breakpoint
, clear_command
,
7668 concat ("Clear breakpoint at specified line or function.\n\
7669 Argument may be line number, function name, or \"*\" and an address.\n\
7670 If line number is specified, all breakpoints in that line are cleared.\n\
7671 If function is specified, breakpoints at beginning of function are cleared.\n\
7672 If an address is specified, breakpoints at that address are cleared.\n\n",
7673 "With no argument, clears all breakpoints in the line that the selected frame\n\
7676 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7678 c
= add_com ("break", class_breakpoint
, break_command
,
7679 concat ("Set breakpoint at specified line or function.\n\
7680 Argument may be line number, function name, or \"*\" and an address.\n\
7681 If line number is specified, break at start of code for that line.\n\
7682 If function is specified, break at start of code for that function.\n\
7683 If an address is specified, break at that exact address.\n",
7684 "With no arg, uses current execution address of selected stack frame.\n\
7685 This is useful for breaking on return to a stack frame.\n\
7687 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7689 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7690 set_cmd_completer (c
, location_completer
);
7692 add_com_alias ("b", "break", class_run
, 1);
7693 add_com_alias ("br", "break", class_run
, 1);
7694 add_com_alias ("bre", "break", class_run
, 1);
7695 add_com_alias ("brea", "break", class_run
, 1);
7699 add_com_alias ("ba", "break", class_breakpoint
, 1);
7700 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7705 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7706 "Break in function/address or break at a line in the current file.",
7707 &stoplist
, "stop ", 1, &cmdlist
);
7708 add_cmd ("in", class_breakpoint
, stopin_command
,
7709 "Break in function or address.\n", &stoplist
);
7710 add_cmd ("at", class_breakpoint
, stopat_command
,
7711 "Break at a line in the current file.\n", &stoplist
);
7712 add_com ("status", class_info
, breakpoints_info
,
7713 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7714 The \"Type\" column indicates one of:\n\
7715 \tbreakpoint - normal breakpoint\n\
7716 \twatchpoint - watchpoint\n\
7717 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7718 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7719 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7720 address and file/line number respectively.\n\n",
7721 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7722 are set to the address of the last breakpoint listed.\n\n\
7723 Convenience variable \"$bpnum\" contains the number of the last\n\
7724 breakpoint set.", NULL
));
7727 add_info ("breakpoints", breakpoints_info
,
7728 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7729 The \"Type\" column indicates one of:\n\
7730 \tbreakpoint - normal breakpoint\n\
7731 \twatchpoint - watchpoint\n\
7732 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7733 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7734 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7735 address and file/line number respectively.\n\n",
7736 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7737 are set to the address of the last breakpoint listed.\n\n\
7738 Convenience variable \"$bpnum\" contains the number of the last\n\
7739 breakpoint set.", NULL
));
7742 add_com ("lb", class_breakpoint
, breakpoints_info
,
7743 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7744 The \"Type\" column indicates one of:\n\
7745 \tbreakpoint - normal breakpoint\n\
7746 \twatchpoint - watchpoint\n\
7747 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7748 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7749 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7750 address and file/line number respectively.\n\n",
7751 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7752 are set to the address of the last breakpoint listed.\n\n\
7753 Convenience variable \"$bpnum\" contains the number of the last\n\
7754 breakpoint set.", NULL
));
7756 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7757 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7758 The \"Type\" column indicates one of:\n\
7759 \tbreakpoint - normal breakpoint\n\
7760 \twatchpoint - watchpoint\n\
7761 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7762 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7763 \tuntil - internal breakpoint used by the \"until\" command\n\
7764 \tfinish - internal breakpoint used by the \"finish\" command\n",
7765 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7766 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7767 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7768 address and file/line number respectively.\n\n",
7769 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7770 are set to the address of the last breakpoint listed.\n\n\
7771 Convenience variable \"$bpnum\" contains the number of the last\n\
7772 breakpoint set.", NULL
),
7773 &maintenanceinfolist
);
7775 add_com ("catch", class_breakpoint
, catch_command
,
7776 "Set catchpoints to catch events.\n\
7777 Raised signals may be caught:\n\
7778 \tcatch signal - all signals\n\
7779 \tcatch signal <signame> - a particular signal\n\
7780 Raised exceptions may be caught:\n\
7781 \tcatch throw - all exceptions, when thrown\n\
7782 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7783 \tcatch catch - all exceptions, when caught\n\
7784 \tcatch catch <exceptname> - a particular exception, when caught\n\
7785 Thread or process events may be caught:\n\
7786 \tcatch thread_start - any threads, just after creation\n\
7787 \tcatch thread_exit - any threads, just before expiration\n\
7788 \tcatch thread_join - any threads, just after joins\n\
7789 Process events may be caught:\n\
7790 \tcatch start - any processes, just after creation\n\
7791 \tcatch exit - any processes, just before expiration\n\
7792 \tcatch fork - calls to fork()\n\
7793 \tcatch vfork - calls to vfork()\n\
7794 \tcatch exec - calls to exec()\n\
7795 Dynamically-linked library events may be caught:\n\
7796 \tcatch load - loads of any library\n\
7797 \tcatch load <libname> - loads of a particular library\n\
7798 \tcatch unload - unloads of any library\n\
7799 \tcatch unload <libname> - unloads of a particular library\n\
7800 The act of your program's execution stopping may also be caught:\n\
7802 C++ exceptions may be caught:\n\
7803 \tcatch throw - all exceptions, when thrown\n\
7804 \tcatch catch - all exceptions, when caught\n\
7806 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7807 after a fork or vfork is caught.\n\n\
7808 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7810 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7811 "Set temporary catchpoints to catch events.\n\
7812 Args like \"catch\" command.\n\
7813 Like \"catch\" except the catchpoint is only temporary,\n\
7814 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7815 by using \"enable delete\" on the catchpoint number.");
7817 c
= add_com ("watch", class_breakpoint
, watch_command
,
7818 "Set a watchpoint for an expression.\n\
7819 A watchpoint stops execution of your program whenever the value of\n\
7820 an expression changes.");
7821 set_cmd_completer (c
, location_completer
);
7823 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
7824 "Set a read watchpoint for an expression.\n\
7825 A watchpoint stops execution of your program whenever the value of\n\
7826 an expression is read.");
7827 set_cmd_completer (c
, location_completer
);
7829 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
7830 "Set a watchpoint for an expression.\n\
7831 A watchpoint stops execution of your program whenever the value of\n\
7832 an expression is either read or written.");
7833 set_cmd_completer (c
, location_completer
);
7835 add_info ("watchpoints", breakpoints_info
,
7836 "Synonym for ``info breakpoints''.");
7839 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
7840 (char *) &can_use_hw_watchpoints
,
7841 "Set debugger's willingness to use watchpoint hardware.\n\
7842 If zero, gdb will not use hardware for new watchpoints, even if\n\
7843 such is available. (However, any hardware watchpoints that were\n\
7844 created before setting this to nonzero, will continue to use watchpoint\n\
7847 add_show_from_set (c
, &showlist
);
7849 can_use_hw_watchpoints
= 1;