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"
52 #include "gdb-events.h"
54 /* Prototypes for local functions. */
56 static void until_break_command_continuation (struct continuation_arg
*arg
);
58 static void catch_command_1 (char *, int, int);
60 static void enable_delete_command (char *, int);
62 static void enable_delete_breakpoint (struct breakpoint
*);
64 static void enable_once_command (char *, int);
66 static void enable_once_breakpoint (struct breakpoint
*);
68 static void disable_command (char *, int);
70 static void enable_command (char *, int);
72 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
74 static void ignore_command (char *, int);
76 static int breakpoint_re_set_one (void *);
78 static void clear_command (char *, int);
80 static void catch_command (char *, int);
82 static void handle_gnu_4_16_catch_command (char *, int, int);
84 static struct symtabs_and_lines
get_catch_sals (int);
86 static void watch_command (char *, int);
88 static int can_use_hardware_watchpoint (struct value
*);
90 extern void break_at_finish_command (char *, int);
91 extern void break_at_finish_at_depth_command (char *, int);
93 extern void tbreak_at_finish_command (char *, int);
95 static void break_command_1 (char *, int, int);
97 static void mention (struct breakpoint
*);
99 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
101 static void check_duplicates (struct breakpoint
*);
103 static void describe_other_breakpoints (CORE_ADDR
, asection
*);
105 static void breakpoints_info (char *, int);
107 static void breakpoint_1 (int, int);
109 static bpstat
bpstat_alloc (struct breakpoint
*, bpstat
);
111 static int breakpoint_cond_eval (void *);
113 static void cleanup_executing_breakpoints (void *);
115 static void commands_command (char *, int);
117 static void condition_command (char *, int);
119 static int get_number_trailer (char **, int);
121 void set_breakpoint_count (int);
130 static int remove_breakpoint (struct breakpoint
*, insertion_state_t
);
132 static enum print_stop_action
print_it_typical (bpstat
);
134 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
138 enum exception_event_kind kind
;
141 args_for_catchpoint_enable
;
143 static int watchpoint_check (void *);
145 static int cover_target_enable_exception_callback (void *);
147 static void maintenance_info_breakpoints (char *, int);
149 static void create_longjmp_breakpoint (char *);
151 static void create_overlay_event_breakpoint (char *);
153 static int hw_breakpoint_used_count (void);
155 static int hw_watchpoint_used_count (enum bptype
, int *);
157 static void hbreak_command (char *, int);
159 static void thbreak_command (char *, int);
161 static void watch_command_1 (char *, int, int);
163 static void rwatch_command (char *, int);
165 static void awatch_command (char *, int);
167 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
169 static void solib_load_unload_1 (char *hookname
,
172 char *cond_string
, enum bptype bp_kind
);
174 static void create_fork_vfork_event_catchpoint (int tempflag
,
176 enum bptype bp_kind
);
178 static void break_at_finish_at_depth_command_1 (char *arg
,
179 int flag
, int from_tty
);
181 static void break_at_finish_command_1 (char *arg
, int flag
, int from_tty
);
183 static void stop_command (char *arg
, int from_tty
);
185 static void stopin_command (char *arg
, int from_tty
);
187 static void stopat_command (char *arg
, int from_tty
);
189 static char *ep_find_event_name_end (char *arg
);
191 static char *ep_parse_optional_if_clause (char **arg
);
193 static char *ep_parse_optional_filename (char **arg
);
195 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
196 static void catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
);
199 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
200 enum exception_event_kind ex_event
,
201 struct symtab_and_line
*sal
);
203 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
204 char *arg
, int tempflag
, int from_tty
);
206 static void tcatch_command (char *arg
, int from_tty
);
208 static void ep_skip_leading_whitespace (char **s
);
210 /* Prototypes for exported functions. */
212 /* If FALSE, gdb will not use hardware support for watchpoints, even
213 if such is available. */
214 static int can_use_hw_watchpoints
;
216 void _initialize_breakpoint (void);
218 extern int addressprint
; /* Print machine addresses? */
220 /* Are we executing breakpoint commands? */
221 static int executing_breakpoint_commands
;
223 /* Are overlay event breakpoints enabled? */
224 static int overlay_events_enabled
;
226 /* Walk the following statement or block through all breakpoints.
227 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
230 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
232 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
233 for (B = breakpoint_chain; \
234 B ? (TMP=B->next, 1): 0; \
237 /* True if SHIFT_INST_REGS defined, false otherwise. */
239 int must_shift_inst_regs
=
240 #if defined(SHIFT_INST_REGS)
247 /* True if breakpoint hit counts should be displayed in breakpoint info. */
249 int show_breakpoint_hit_counts
= 1;
251 /* Chain of all breakpoints defined. */
253 struct breakpoint
*breakpoint_chain
;
255 /* Number of last breakpoint made. */
257 int breakpoint_count
;
259 /* Pointer to current exception event record */
260 static struct exception_event_record
*current_exception_event
;
262 /* Indicator of whether exception catchpoints should be nuked
263 between runs of a program */
264 int exception_catchpoints_are_fragile
= 0;
266 /* Indicator of when exception catchpoints set-up should be
267 reinitialized -- e.g. when program is re-run */
268 int exception_support_initialized
= 0;
270 /* This function returns a pointer to the string representation of the
271 pathname of the dynamically-linked library that has just been
274 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
275 or undefined results are guaranteed.
277 This string's contents are only valid immediately after the
278 inferior has stopped in the dynamic linker hook, and becomes
279 invalid as soon as the inferior is continued. Clients should make
280 a copy of this string if they wish to continue the inferior and
281 then access the string. */
283 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
284 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
287 /* This function returns a pointer to the string representation of the
288 pathname of the dynamically-linked library that has just been
291 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
292 TRUE, or undefined results are guaranteed.
294 This string's contents are only valid immediately after the
295 inferior has stopped in the dynamic linker hook, and becomes
296 invalid as soon as the inferior is continued. Clients should make
297 a copy of this string if they wish to continue the inferior and
298 then access the string. */
300 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
301 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
304 /* This function is called by the "catch load" command. It allows the
305 debugger to be notified by the dynamic linker when a specified
306 library file (or any library file, if filename is NULL) is loaded. */
308 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
309 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
310 error ("catch of library loads not yet implemented on this platform")
313 /* This function is called by the "catch unload" command. It allows
314 the debugger to be notified by the dynamic linker when a specified
315 library file (or any library file, if filename is NULL) is
318 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
319 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
320 error ("catch of library unloads not yet implemented on this platform")
323 /* Set breakpoint count to NUM. */
326 set_breakpoint_count (int num
)
328 breakpoint_count
= num
;
329 set_internalvar (lookup_internalvar ("bpnum"),
330 value_from_longest (builtin_type_int
, (LONGEST
) num
));
333 /* Used in run_command to zero the hit count when a new run starts. */
336 clear_breakpoint_hit_counts (void)
338 struct breakpoint
*b
;
344 /* Default address, symtab and line to put a breakpoint at
345 for "break" command with no arg.
346 if default_breakpoint_valid is zero, the other three are
347 not valid, and "break" with no arg is an error.
349 This set by print_stack_frame, which calls set_default_breakpoint. */
351 int default_breakpoint_valid
;
352 CORE_ADDR default_breakpoint_address
;
353 struct symtab
*default_breakpoint_symtab
;
354 int default_breakpoint_line
;
356 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
357 Advance *PP after the string and any trailing whitespace.
359 Currently the string can either be a number or "$" followed by the name
360 of a convenience variable. Making it an expression wouldn't work well
361 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
363 TRAILER is a character which can be found after the number; most
364 commonly this is `-'. If you don't want a trailer, use \0. */
366 get_number_trailer (char **pp
, int trailer
)
368 int retval
= 0; /* default */
372 /* Empty line means refer to the last breakpoint. */
373 return breakpoint_count
;
376 /* Make a copy of the name, so we can null-terminate it
377 to pass to lookup_internalvar(). */
382 while (isalnum (*p
) || *p
== '_')
384 varname
= (char *) alloca (p
- start
+ 1);
385 strncpy (varname
, start
, p
- start
);
386 varname
[p
- start
] = '\0';
387 val
= value_of_internalvar (lookup_internalvar (varname
));
388 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_INT
)
389 retval
= (int) value_as_long (val
);
392 printf_filtered ("Convenience variable must have integer value.\n");
400 while (*p
>= '0' && *p
<= '9')
403 /* There is no number here. (e.g. "cond a == b"). */
405 /* Skip non-numeric token */
406 while (*p
&& !isspace((int) *p
))
408 /* Return zero, which caller must interpret as error. */
414 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
416 /* Trailing junk: return 0 and let caller print error msg. */
417 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
428 /* Like get_number_trailer, but don't allow a trailer. */
430 get_number (char **pp
)
432 return get_number_trailer (pp
, '\0');
435 /* Parse a number or a range.
436 * A number will be of the form handled by get_number.
437 * A range will be of the form <number1> - <number2>, and
438 * will represent all the integers between number1 and number2,
441 * While processing a range, this fuction is called iteratively;
442 * At each call it will return the next value in the range.
444 * At the beginning of parsing a range, the char pointer PP will
445 * be advanced past <number1> and left pointing at the '-' token.
446 * Subsequent calls will not advance the pointer until the range
447 * is completed. The call that completes the range will advance
448 * pointer PP past <number2>.
452 get_number_or_range (char **pp
)
454 static int last_retval
, end_value
;
455 static char *end_ptr
;
456 static int in_range
= 0;
460 /* Default case: pp is pointing either to a solo number,
461 or to the first number of a range. */
462 last_retval
= get_number_trailer (pp
, '-');
467 /* This is the start of a range (<number1> - <number2>).
468 Skip the '-', parse and remember the second number,
469 and also remember the end of the final token. */
473 while (isspace ((int) *end_ptr
))
474 end_ptr
++; /* skip white space */
475 end_value
= get_number (temp
);
476 if (end_value
< last_retval
)
478 error ("inverted range");
480 else if (end_value
== last_retval
)
482 /* degenerate range (number1 == number2). Advance the
483 token pointer so that the range will be treated as a
492 error ("negative value");
495 /* pp points to the '-' that betokens a range. All
496 number-parsing has already been done. Return the next
497 integer value (one greater than the saved previous value).
498 Do not advance the token pointer 'pp' until the end of range
501 if (++last_retval
== end_value
)
503 /* End of range reached; advance token pointer. */
513 /* condition N EXP -- set break condition of breakpoint N to EXP. */
516 condition_command (char *arg
, int from_tty
)
518 register struct breakpoint
*b
;
523 error_no_arg ("breakpoint number");
526 bnum
= get_number (&p
);
528 error ("Bad breakpoint argument: '%s'", arg
);
531 if (b
->number
== bnum
)
538 if (b
->cond_string
!= NULL
)
539 xfree (b
->cond_string
);
544 b
->cond_string
= NULL
;
546 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
551 /* I don't know if it matters whether this is the string the user
552 typed in or the decompiled expression. */
553 b
->cond_string
= savestring (arg
, strlen (arg
));
554 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->address
), 0);
556 error ("Junk at end of expression");
558 breakpoints_changed ();
559 breakpoint_modify_event (b
->number
);
563 error ("No breakpoint number %d.", bnum
);
568 commands_command (char *arg
, int from_tty
)
570 register struct breakpoint
*b
;
573 struct command_line
*l
;
575 /* If we allowed this, we would have problems with when to
576 free the storage, if we change the commands currently
579 if (executing_breakpoint_commands
)
580 error ("Can't use the \"commands\" command among a breakpoint's commands.");
583 bnum
= get_number (&p
);
586 error ("Unexpected extra arguments following breakpoint number.");
589 if (b
->number
== bnum
)
593 "Type commands for when breakpoint %d is hit, one per line.",
595 l
= read_command_lines (tmpbuf
, from_tty
);
596 free_command_lines (&b
->commands
);
598 breakpoints_changed ();
599 breakpoint_modify_event (b
->number
);
602 error ("No breakpoint number %d.", bnum
);
605 /* Like target_read_memory() but if breakpoints are inserted, return
606 the shadow contents instead of the breakpoints themselves.
608 Read "memory data" from whatever target or inferior we have.
609 Returns zero if successful, errno value if not. EIO is used
610 for address out of bounds. If breakpoints are inserted, returns
611 shadow contents, not the breakpoints themselves. From breakpoint.c. */
614 read_memory_nobpt (CORE_ADDR memaddr
, char *myaddr
, unsigned len
)
617 struct breakpoint
*b
;
618 CORE_ADDR bp_addr
= 0;
621 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
622 /* No breakpoints on this machine. */
623 return target_read_memory (memaddr
, myaddr
, len
);
627 if (b
->type
== bp_none
)
628 warning ("reading through apparently deleted breakpoint #%d?",
631 /* memory breakpoint? */
632 if (b
->type
== bp_watchpoint
633 || b
->type
== bp_hardware_watchpoint
634 || b
->type
== bp_read_watchpoint
635 || b
->type
== bp_access_watchpoint
)
640 /* Addresses and length of the part of the breakpoint that
642 /* XXXX The m68k, sh and h8300 have different local and remote
643 breakpoint values. BREAKPOINT_FROM_PC still manages to
644 correctly determine the breakpoints memory address and size
645 for these targets. */
646 bp_addr
= b
->address
;
648 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
653 if (bp_addr
+ bp_size
<= memaddr
)
654 /* The breakpoint is entirely before the chunk of memory we
657 if (bp_addr
>= memaddr
+ len
)
658 /* The breakpoint is entirely after the chunk of memory we are
661 /* Copy the breakpoint from the shadow contents, and recurse for
662 the things before and after. */
664 /* Offset within shadow_contents. */
667 if (bp_addr
< memaddr
)
669 /* Only copy the second part of the breakpoint. */
670 bp_size
-= memaddr
- bp_addr
;
671 bptoffset
= memaddr
- bp_addr
;
675 if (bp_addr
+ bp_size
> memaddr
+ len
)
677 /* Only copy the first part of the breakpoint. */
678 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
681 memcpy (myaddr
+ bp_addr
- memaddr
,
682 b
->shadow_contents
+ bptoffset
, bp_size
);
684 if (bp_addr
> memaddr
)
686 /* Copy the section of memory before the breakpoint. */
687 status
= read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
692 if (bp_addr
+ bp_size
< memaddr
+ len
)
694 /* Copy the section of memory after the breakpoint. */
695 status
= read_memory_nobpt (bp_addr
+ bp_size
,
696 myaddr
+ bp_addr
+ bp_size
- memaddr
,
697 memaddr
+ len
- (bp_addr
+ bp_size
));
704 /* Nothing overlaps. Just call read_memory_noerr. */
705 return target_read_memory (memaddr
, myaddr
, len
);
709 /* insert_breakpoints is used when starting or continuing the program.
710 remove_breakpoints is used when the program stops.
711 Both return zero if successful,
712 or an `errno' value if could not write the inferior. */
715 insert_breakpoints (void)
717 register struct breakpoint
*b
, *temp
;
718 int return_val
= 0; /* return success code. */
720 int disabled_breaks
= 0;
721 int hw_breakpoint_error
= 0;
722 #ifdef ONE_PROCESS_WRITETEXT
723 int process_warning
= 0;
726 static char message1
[] = "Error inserting catchpoint %d:\n";
727 static char message
[sizeof (message1
) + 30];
729 struct ui_file
*tmp_error_stream
= mem_fileopen ();
730 make_cleanup_ui_file_delete (tmp_error_stream
);
732 /* Explicitly mark the warning -- this will only be printed if
733 there was an error. */
734 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
736 ALL_BREAKPOINTS_SAFE (b
, temp
)
738 /* Permanent breakpoints cannot be inserted or removed. Disabled
739 breakpoints should not be inserted. */
740 if (b
->enable_state
!= bp_enabled
)
743 if ((b
->type
== bp_watchpoint
744 || b
->type
== bp_hardware_watchpoint
745 || b
->type
== bp_read_watchpoint
746 || b
->type
== bp_access_watchpoint
) && (!b
->val
))
749 val
= evaluate_expression (b
->exp
);
751 if (VALUE_LAZY (val
))
752 value_fetch_lazy (val
);
755 if (b
->type
!= bp_watchpoint
756 && b
->type
!= bp_hardware_watchpoint
757 && b
->type
!= bp_read_watchpoint
758 && b
->type
!= bp_access_watchpoint
759 && b
->type
!= bp_catch_fork
760 && b
->type
!= bp_catch_vfork
761 && b
->type
!= bp_catch_exec
762 && b
->type
!= bp_catch_throw
763 && b
->type
!= bp_catch_catch
767 /* "Normal" instruction breakpoint: either the standard
768 trap-instruction bp (bp_breakpoint), or a
769 bp_hardware_breakpoint. */
771 /* First check to see if we have to handle an overlay. */
772 if (overlay_debugging
== ovly_off
773 || b
->section
== NULL
774 || !(section_is_overlay (b
->section
)))
776 /* No overlay handling: just set the breakpoint. */
778 if (b
->type
== bp_hardware_breakpoint
)
779 val
= target_insert_hw_breakpoint (b
->address
,
782 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
786 /* This breakpoint is in an overlay section.
787 Shall we set a breakpoint at the LMA? */
788 if (!overlay_events_enabled
)
790 /* Yes -- overlay event support is not active,
791 so we must try to set a breakpoint at the LMA.
792 This will not work for a hardware breakpoint. */
793 if (b
->type
== bp_hardware_breakpoint
)
794 warning ("hardware breakpoint %d not supported in overlay!\n",
798 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
800 /* Set a software (trap) breakpoint at the LMA. */
801 val
= target_insert_breakpoint (addr
, b
->shadow_contents
);
803 fprintf_unfiltered (tmp_error_stream
,
804 "Overlay breakpoint %d failed: in ROM?",
808 /* Shall we set a breakpoint at the VMA? */
809 if (section_is_mapped (b
->section
))
811 /* Yes. This overlay section is mapped into memory. */
812 if (b
->type
== bp_hardware_breakpoint
)
813 val
= target_insert_hw_breakpoint (b
->address
,
816 val
= target_insert_breakpoint (b
->address
,
821 /* No. This breakpoint will not be inserted.
822 No error, but do not mark the bp as 'inserted'. */
829 /* Can't set the breakpoint. */
830 #if defined (DISABLE_UNSETTABLE_BREAK)
831 if (DISABLE_UNSETTABLE_BREAK (b
->address
))
833 /* See also: disable_breakpoints_in_shlibs. */
835 b
->enable_state
= bp_shlib_disabled
;
836 if (!disabled_breaks
)
838 fprintf_unfiltered (tmp_error_stream
,
839 "Cannot insert breakpoint %d.\n",
841 fprintf_unfiltered (tmp_error_stream
,
842 "Temporarily disabling shared library breakpoints:\n");
845 fprintf_unfiltered (tmp_error_stream
,
846 "breakpoint #%d\n", b
->number
);
851 #ifdef ONE_PROCESS_WRITETEXT
854 if (b
->type
== bp_hardware_breakpoint
)
856 hw_breakpoint_error
= 1;
857 fprintf_unfiltered (tmp_error_stream
,
858 "Cannot insert hardware breakpoint %d.\n",
863 fprintf_unfiltered (tmp_error_stream
,
864 "Cannot insert breakpoint %d.\n",
866 fprintf_filtered (tmp_error_stream
,
867 "Error accessing memory address ");
868 print_address_numeric (b
->address
, 1, tmp_error_stream
);
869 fprintf_filtered (tmp_error_stream
, ": %s.\n",
870 safe_strerror (val
));
879 return_val
= val
; /* remember failure */
881 else if (ep_is_exception_catchpoint (b
)
886 /* If we get here, we must have a callback mechanism for exception
887 events -- with g++ style embedded label support, we insert
888 ordinary breakpoints and not catchpoints. */
889 /* Format possible error message */
890 sprintf (message
, message1
, b
->number
);
892 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
895 /* Couldn't set breakpoint for some reason */
896 fprintf_unfiltered (tmp_error_stream
,
897 "Cannot insert catchpoint %d; disabling it.\n",
899 fprintf_filtered (tmp_error_stream
,
900 "Error accessing memory address ");
901 print_address_numeric (b
->address
, 1, tmp_error_stream
);
902 fprintf_filtered (tmp_error_stream
, ": %s.\n",
903 safe_strerror (val
));
904 b
->enable_state
= bp_disabled
;
908 /* Bp set, now make sure callbacks are enabled */
910 args_for_catchpoint_enable args
;
911 args
.kind
= b
->type
== bp_catch_catch
?
912 EX_EVENT_CATCH
: EX_EVENT_THROW
;
914 val
= catch_errors (cover_target_enable_exception_callback
,
916 message
, RETURN_MASK_ALL
);
917 if (val
!= 0 && val
!= -1)
921 /* Check if something went wrong; val == 0 can be ignored */
924 /* something went wrong */
925 fprintf_unfiltered (tmp_error_stream
,
926 "Cannot insert catchpoint %d; disabling it.\n",
928 b
->enable_state
= bp_disabled
;
933 return_val
= val
; /* remember failure */
936 else if ((b
->type
== bp_hardware_watchpoint
||
937 b
->type
== bp_read_watchpoint
||
938 b
->type
== bp_access_watchpoint
)
939 && b
->disposition
!= disp_del_at_next_stop
943 struct frame_info
*saved_frame
;
944 int saved_level
, within_current_scope
;
945 struct value
*mark
= value_mark ();
948 /* Save the current frame and level so we can restore it after
949 evaluating the watchpoint expression on its own frame. */
950 saved_frame
= deprecated_selected_frame
;
951 saved_level
= frame_relative_level (deprecated_selected_frame
);
953 /* Determine if the watchpoint is within scope. */
954 if (b
->exp_valid_block
== NULL
)
955 within_current_scope
= 1;
958 struct frame_info
*fi
;
959 fi
= frame_find_by_id (b
->watchpoint_frame
);
960 within_current_scope
= (fi
!= NULL
);
961 if (within_current_scope
)
965 if (within_current_scope
)
967 /* Evaluate the expression and cut the chain of values
968 produced off from the value chain.
970 Make sure the value returned isn't lazy; we use
971 laziness to determine what memory GDB actually needed
972 in order to compute the value of the expression. */
973 v
= evaluate_expression (b
->exp
);
975 value_release_to_mark (mark
);
980 /* Look at each value on the value chain. */
981 for (; v
; v
= v
->next
)
983 /* If it's a memory location, and GDB actually needed
984 its contents to evaluate the expression, then we
986 if (VALUE_LVAL (v
) == lval_memory
989 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
991 /* We only watch structs and arrays if user asked
992 for it explicitly, never if they just happen to
993 appear in the middle of some value chain. */
994 if (v
== b
->val_chain
995 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
996 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1001 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1002 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1004 if (b
->type
== bp_read_watchpoint
)
1006 else if (b
->type
== bp_access_watchpoint
)
1009 val
= target_insert_watchpoint (addr
, len
, type
);
1012 /* Don't exit the loop, try to insert
1013 every value on the value chain. That's
1014 because we will be removing all the
1015 watches below, and removing a
1016 watchpoint we didn't insert could have
1024 /* Failure to insert a watchpoint on any memory value in the
1025 value chain brings us here. */
1028 remove_breakpoint (b
, mark_uninserted
);
1029 hw_breakpoint_error
= 1;
1030 fprintf_unfiltered (tmp_error_stream
,
1031 "Could not insert hardware watchpoint %d.\n",
1038 printf_filtered ("Hardware watchpoint %d deleted ", b
->number
);
1039 printf_filtered ("because the program has left the block \n");
1040 printf_filtered ("in which its expression is valid.\n");
1041 if (b
->related_breakpoint
)
1042 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1043 b
->disposition
= disp_del_at_next_stop
;
1046 /* Restore the frame and level. */
1047 if ((saved_frame
!= deprecated_selected_frame
) ||
1048 (saved_level
!= frame_relative_level (deprecated_selected_frame
)))
1049 select_frame (saved_frame
);
1052 return_val
= val
; /* remember failure */
1054 else if ((b
->type
== bp_catch_fork
1055 || b
->type
== bp_catch_vfork
1056 || b
->type
== bp_catch_exec
)
1064 val
= target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
1066 case bp_catch_vfork
:
1067 val
= target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
1070 val
= target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
1073 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1078 fprintf_unfiltered (tmp_error_stream
,
1079 "Cannot insert catchpoint %d.", b
->number
);
1085 return_val
= val
; /* remember failure */
1091 /* If a hardware breakpoint or watchpoint was inserted, add a
1092 message about possibly exhausted resources. */
1093 if (hw_breakpoint_error
)
1095 fprintf_unfiltered (tmp_error_stream
,
1096 "Could not insert hardware breakpoints:\n\
1097 You may have requested too many hardware breakpoints/watchpoints.\n");
1099 #ifdef ONE_PROCESS_WRITETEXT
1100 if (process_warning
)
1101 fprintf_unfiltered (tmp_error_stream
,
1102 "The same program may be running in another process.");
1104 target_terminal_ours_for_output ();
1105 error_stream (tmp_error_stream
);
1111 remove_breakpoints (void)
1113 register struct breakpoint
*b
;
1120 val
= remove_breakpoint (b
, mark_uninserted
);
1129 remove_hw_watchpoints (void)
1131 register struct breakpoint
*b
;
1137 && (b
->type
== bp_hardware_watchpoint
1138 || b
->type
== bp_read_watchpoint
1139 || b
->type
== bp_access_watchpoint
))
1141 val
= remove_breakpoint (b
, mark_uninserted
);
1150 reattach_breakpoints (int pid
)
1152 register struct breakpoint
*b
;
1154 struct cleanup
*old_chain
= save_inferior_ptid ();
1156 /* Set inferior_ptid; remove_breakpoint uses this global. */
1157 inferior_ptid
= pid_to_ptid (pid
);
1162 remove_breakpoint (b
, mark_inserted
);
1163 if (b
->type
== bp_hardware_breakpoint
)
1164 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1166 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1169 do_cleanups (old_chain
);
1174 do_cleanups (old_chain
);
1179 update_breakpoints_after_exec (void)
1181 struct breakpoint
*b
;
1182 struct breakpoint
*temp
;
1184 /* Doing this first prevents the badness of having delete_breakpoint()
1185 write a breakpoint's current "shadow contents" to lift the bp. That
1186 shadow is NOT valid after an exec()! */
1187 mark_breakpoints_out ();
1189 ALL_BREAKPOINTS_SAFE (b
, temp
)
1191 /* Solib breakpoints must be explicitly reset after an exec(). */
1192 if (b
->type
== bp_shlib_event
)
1194 delete_breakpoint (b
);
1198 /* Thread event breakpoints must be set anew after an exec(),
1199 as must overlay event breakpoints. */
1200 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1202 delete_breakpoint (b
);
1206 /* Step-resume breakpoints are meaningless after an exec(). */
1207 if (b
->type
== bp_step_resume
)
1209 delete_breakpoint (b
);
1213 /* Ditto the sigtramp handler breakpoints. */
1214 if (b
->type
== bp_through_sigtramp
)
1216 delete_breakpoint (b
);
1220 /* Ditto the exception-handling catchpoints. */
1221 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1223 delete_breakpoint (b
);
1227 /* Don't delete an exec catchpoint, because else the inferior
1228 won't stop when it ought!
1230 Similarly, we probably ought to keep vfork catchpoints, 'cause
1231 on this target, we may not be able to stop when the vfork is
1232 seen, but only when the subsequent exec is seen. (And because
1233 deleting fork catchpoints here but not vfork catchpoints will
1234 seem mysterious to users, keep those too.)
1236 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1237 target address field, if any, is sufficient to have it be reset
1238 automagically. Certainly on HP-UX that's true.
1240 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1241 valid code address on some platforms (like the mn10200 and
1242 mn10300 simulators). We shouldn't assign any special
1243 interpretation to a breakpoint with a zero address. And in
1244 fact, GDB doesn't --- I can't see what that comment above is
1245 talking about. As far as I can tell, setting the address of a
1246 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1247 is meaningless, since those are implemented with HP-UX kernel
1248 hackery, not by storing breakpoint instructions somewhere. */
1249 if ((b
->type
== bp_catch_exec
) ||
1250 (b
->type
== bp_catch_vfork
) ||
1251 (b
->type
== bp_catch_fork
))
1253 b
->address
= (CORE_ADDR
) NULL
;
1257 /* bp_finish is a special case. The only way we ought to be able
1258 to see one of these when an exec() has happened, is if the user
1259 caught a vfork, and then said "finish". Ordinarily a finish just
1260 carries them to the call-site of the current callee, by setting
1261 a temporary bp there and resuming. But in this case, the finish
1262 will carry them entirely through the vfork & exec.
1264 We don't want to allow a bp_finish to remain inserted now. But
1265 we can't safely delete it, 'cause finish_command has a handle to
1266 the bp on a bpstat, and will later want to delete it. There's a
1267 chance (and I've seen it happen) that if we delete the bp_finish
1268 here, that its storage will get reused by the time finish_command
1269 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1270 We really must allow finish_command to delete a bp_finish.
1272 In the absense of a general solution for the "how do we know
1273 it's safe to delete something others may have handles to?"
1274 problem, what we'll do here is just uninsert the bp_finish, and
1275 let finish_command delete it.
1277 (We know the bp_finish is "doomed" in the sense that it's
1278 momentary, and will be deleted as soon as finish_command sees
1279 the inferior stopped. So it doesn't matter that the bp's
1280 address is probably bogus in the new a.out, unlike e.g., the
1281 solib breakpoints.) */
1283 if (b
->type
== bp_finish
)
1288 /* Without a symbolic address, we have little hope of the
1289 pre-exec() address meaning the same thing in the post-exec()
1291 if (b
->addr_string
== NULL
)
1293 delete_breakpoint (b
);
1297 /* If this breakpoint has survived the above battery of checks, then
1298 it must have a symbolic address. Be sure that it gets reevaluated
1299 to a target address, rather than reusing the old evaluation.
1301 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1302 for bp_catch_exec and friends, I'm pretty sure this is entirely
1303 unnecessary. A call to breakpoint_re_set_one always recomputes
1304 the breakpoint's address from scratch, or deletes it if it can't.
1305 So I think this assignment could be deleted without effect. */
1306 b
->address
= (CORE_ADDR
) NULL
;
1308 /* FIXME what about longjmp breakpoints? Re-create them here? */
1309 create_overlay_event_breakpoint ("_ovly_debug_event");
1313 detach_breakpoints (int pid
)
1315 register struct breakpoint
*b
;
1317 struct cleanup
*old_chain
= save_inferior_ptid ();
1319 if (pid
== PIDGET (inferior_ptid
))
1320 error ("Cannot detach breakpoints of inferior_ptid");
1322 /* Set inferior_ptid; remove_breakpoint uses this global. */
1323 inferior_ptid
= pid_to_ptid (pid
);
1328 val
= remove_breakpoint (b
, mark_inserted
);
1331 do_cleanups (old_chain
);
1336 do_cleanups (old_chain
);
1341 remove_breakpoint (struct breakpoint
*b
, insertion_state_t is
)
1345 if (b
->enable_state
== bp_permanent
)
1346 /* Permanent breakpoints cannot be inserted or removed. */
1349 if (b
->type
== bp_none
)
1350 warning ("attempted to remove apparently deleted breakpoint #%d?",
1353 if (b
->type
!= bp_watchpoint
1354 && b
->type
!= bp_hardware_watchpoint
1355 && b
->type
!= bp_read_watchpoint
1356 && b
->type
!= bp_access_watchpoint
1357 && b
->type
!= bp_catch_fork
1358 && b
->type
!= bp_catch_vfork
1359 && b
->type
!= bp_catch_exec
1360 && b
->type
!= bp_catch_catch
1361 && b
->type
!= bp_catch_throw
)
1363 /* "Normal" instruction breakpoint: either the standard
1364 trap-instruction bp (bp_breakpoint), or a
1365 bp_hardware_breakpoint. */
1367 /* First check to see if we have to handle an overlay. */
1368 if (overlay_debugging
== ovly_off
1369 || b
->section
== NULL
1370 || !(section_is_overlay (b
->section
)))
1372 /* No overlay handling: just remove the breakpoint. */
1374 if (b
->type
== bp_hardware_breakpoint
)
1375 val
= target_remove_hw_breakpoint (b
->address
,
1376 b
->shadow_contents
);
1378 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1382 /* This breakpoint is in an overlay section.
1383 Did we set a breakpoint at the LMA? */
1384 if (!overlay_events_enabled
)
1386 /* Yes -- overlay event support is not active, so we
1387 should have set a breakpoint at the LMA. Remove it.
1389 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1391 /* Ignore any failures: if the LMA is in ROM, we will
1392 have already warned when we failed to insert it. */
1393 if (b
->type
!= bp_hardware_breakpoint
)
1394 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1396 target_remove_breakpoint (addr
, b
->shadow_contents
);
1398 /* Did we set a breakpoint at the VMA?
1399 If so, we will have marked the breakpoint 'inserted'. */
1402 /* Yes -- remove it. Previously we did not bother to
1403 remove the breakpoint if the section had been
1404 unmapped, but let's not rely on that being safe. We
1405 don't know what the overlay manager might do. */
1406 if (b
->type
== bp_hardware_breakpoint
)
1407 val
= target_remove_hw_breakpoint (b
->address
,
1408 b
->shadow_contents
);
1410 val
= target_remove_breakpoint (b
->address
,
1411 b
->shadow_contents
);
1415 /* No -- not inserted, so no need to remove. No error. */
1421 b
->inserted
= (is
== mark_inserted
);
1423 else if ((b
->type
== bp_hardware_watchpoint
||
1424 b
->type
== bp_read_watchpoint
||
1425 b
->type
== bp_access_watchpoint
)
1426 && b
->enable_state
== bp_enabled
1432 b
->inserted
= (is
== mark_inserted
);
1433 /* Walk down the saved value chain. */
1434 for (v
= b
->val_chain
; v
; v
= v
->next
)
1436 /* For each memory reference remove the watchpoint
1438 if (VALUE_LVAL (v
) == lval_memory
1439 && ! VALUE_LAZY (v
))
1441 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
1443 if (v
== b
->val_chain
1444 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1445 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1450 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1451 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1453 if (b
->type
== bp_read_watchpoint
)
1455 else if (b
->type
== bp_access_watchpoint
)
1458 val
= target_remove_watchpoint (addr
, len
, type
);
1465 /* Failure to remove any of the hardware watchpoints comes here. */
1466 if ((is
== mark_uninserted
) && (b
->inserted
))
1467 warning ("Could not remove hardware watchpoint %d.",
1470 /* Free the saved value chain. We will construct a new one
1471 the next time the watchpoint is inserted. */
1472 for (v
= b
->val_chain
; v
; v
= n
)
1477 b
->val_chain
= NULL
;
1479 else if ((b
->type
== bp_catch_fork
||
1480 b
->type
== bp_catch_vfork
||
1481 b
->type
== bp_catch_exec
)
1482 && b
->enable_state
== bp_enabled
1489 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1491 case bp_catch_vfork
:
1492 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1495 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1498 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1503 b
->inserted
= (is
== mark_inserted
);
1505 else if ((b
->type
== bp_catch_catch
||
1506 b
->type
== bp_catch_throw
)
1507 && b
->enable_state
== bp_enabled
1511 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1514 b
->inserted
= (is
== mark_inserted
);
1516 else if (ep_is_exception_catchpoint (b
)
1517 && b
->inserted
/* sometimes previous insert doesn't happen */
1518 && b
->enable_state
== bp_enabled
1522 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1526 b
->inserted
= (is
== mark_inserted
);
1532 /* Clear the "inserted" flag in all breakpoints. */
1535 mark_breakpoints_out (void)
1537 register struct breakpoint
*b
;
1543 /* Clear the "inserted" flag in all breakpoints and delete any
1544 breakpoints which should go away between runs of the program.
1546 Plus other such housekeeping that has to be done for breakpoints
1549 Note: this function gets called at the end of a run (by
1550 generic_mourn_inferior) and when a run begins (by
1551 init_wait_for_inferior). */
1556 breakpoint_init_inferior (enum inf_context context
)
1558 register struct breakpoint
*b
, *temp
;
1559 static int warning_needed
= 0;
1561 ALL_BREAKPOINTS_SAFE (b
, temp
)
1568 case bp_watchpoint_scope
:
1570 /* If the call dummy breakpoint is at the entry point it will
1571 cause problems when the inferior is rerun, so we better
1574 Also get rid of scope breakpoints. */
1575 delete_breakpoint (b
);
1579 case bp_hardware_watchpoint
:
1580 case bp_read_watchpoint
:
1581 case bp_access_watchpoint
:
1583 /* Likewise for watchpoints on local expressions. */
1584 if (b
->exp_valid_block
!= NULL
)
1585 delete_breakpoint (b
);
1586 if (context
== inf_starting
)
1588 /* Reset val field to force reread of starting value
1589 in insert_breakpoints. */
1591 value_free (b
->val
);
1596 /* Likewise for exception catchpoints in dynamic-linked
1597 executables where required */
1598 if (ep_is_exception_catchpoint (b
) &&
1599 exception_catchpoints_are_fragile
)
1602 delete_breakpoint (b
);
1608 if (exception_catchpoints_are_fragile
)
1609 exception_support_initialized
= 0;
1611 /* Don't issue the warning unless it's really needed... */
1612 if (warning_needed
&& (context
!= inf_exited
))
1614 warning ("Exception catchpoints from last run were deleted.");
1615 warning ("You must reinsert them explicitly.");
1620 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1621 exists at PC. It returns ordinary_breakpoint_here if it's an
1622 ordinary breakpoint, or permanent_breakpoint_here if it's a
1623 permanent breakpoint.
1624 - When continuing from a location with an ordinary breakpoint, we
1625 actually single step once before calling insert_breakpoints.
1626 - When continuing from a localion with a permanent breakpoint, we
1627 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1628 the target, to advance the PC past the breakpoint. */
1630 enum breakpoint_here
1631 breakpoint_here_p (CORE_ADDR pc
)
1633 register struct breakpoint
*b
;
1634 int any_breakpoint_here
= 0;
1637 if ((b
->enable_state
== bp_enabled
1638 || b
->enable_state
== bp_permanent
)
1639 && b
->address
== pc
) /* bp is enabled and matches pc */
1641 if (overlay_debugging
1642 && section_is_overlay (b
->section
)
1643 && !section_is_mapped (b
->section
))
1644 continue; /* unmapped overlay -- can't be a match */
1645 else if (b
->enable_state
== bp_permanent
)
1646 return permanent_breakpoint_here
;
1648 any_breakpoint_here
= 1;
1651 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1655 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1656 but it only returns true if there is actually a breakpoint inserted
1660 breakpoint_inserted_here_p (CORE_ADDR pc
)
1662 register struct breakpoint
*b
;
1666 && b
->address
== pc
) /* bp is inserted and matches pc */
1668 if (overlay_debugging
1669 && section_is_overlay (b
->section
)
1670 && !section_is_mapped (b
->section
))
1671 continue; /* unmapped overlay -- can't be a match */
1679 /* Return nonzero if FRAME is a dummy frame. We can't use
1680 DEPRECATED_PC_IN_CALL_DUMMY because figuring out the saved SP would
1681 take too much time, at least using get_saved_register on the 68k.
1682 This means that for this function to work right a port must use the
1683 bp_call_dummy breakpoint. */
1686 deprecated_frame_in_dummy (struct frame_info
*frame
)
1688 struct breakpoint
*b
;
1693 /* This function is used by two files: get_frame_type(), after first
1694 checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and
1695 sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */
1696 gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES
);
1700 if (b
->type
== bp_call_dummy
1701 && frame_id_eq (b
->frame_id
, get_frame_id (frame
))
1702 /* We need to check the PC as well as the frame on the sparc,
1703 for signals.exp in the testsuite. */
1704 && (get_frame_pc (frame
)
1706 - SIZEOF_CALL_DUMMY_WORDS
/ sizeof (LONGEST
) * REGISTER_SIZE
))
1707 && get_frame_pc (frame
) <= b
->address
)
1713 /* breakpoint_thread_match (PC, PID) returns true if the breakpoint at
1714 PC is valid for process/thread PID. */
1717 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1719 struct breakpoint
*b
;
1722 thread
= pid_to_thread_id (ptid
);
1725 if (b
->enable_state
!= bp_disabled
1726 && b
->enable_state
!= bp_shlib_disabled
1727 && b
->enable_state
!= bp_call_disabled
1729 && (b
->thread
== -1 || b
->thread
== thread
))
1731 if (overlay_debugging
1732 && section_is_overlay (b
->section
)
1733 && !section_is_mapped (b
->section
))
1734 continue; /* unmapped overlay -- can't be a match */
1743 /* bpstat stuff. External routines' interfaces are documented
1747 ep_is_catchpoint (struct breakpoint
*ep
)
1750 (ep
->type
== bp_catch_load
)
1751 || (ep
->type
== bp_catch_unload
)
1752 || (ep
->type
== bp_catch_fork
)
1753 || (ep
->type
== bp_catch_vfork
)
1754 || (ep
->type
== bp_catch_exec
)
1755 || (ep
->type
== bp_catch_catch
)
1756 || (ep
->type
== bp_catch_throw
);
1758 /* ??rehrauer: Add more kinds here, as are implemented... */
1762 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1765 (ep
->type
== bp_catch_load
)
1766 || (ep
->type
== bp_catch_unload
);
1770 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1773 (ep
->type
== bp_catch_catch
)
1774 || (ep
->type
== bp_catch_throw
);
1777 /* Clear a bpstat so that it says we are not at any breakpoint.
1778 Also free any storage that is part of a bpstat. */
1781 bpstat_clear (bpstat
*bsp
)
1792 if (p
->old_val
!= NULL
)
1793 value_free (p
->old_val
);
1794 free_command_lines (&p
->commands
);
1801 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1802 is part of the bpstat is copied as well. */
1805 bpstat_copy (bpstat bs
)
1809 bpstat retval
= NULL
;
1814 for (; bs
!= NULL
; bs
= bs
->next
)
1816 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1817 memcpy (tmp
, bs
, sizeof (*tmp
));
1819 /* This is the first thing in the chain. */
1829 /* Find the bpstat associated with this breakpoint */
1832 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1837 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1839 if (bsp
->breakpoint_at
== breakpoint
)
1845 /* Find a step_resume breakpoint associated with this bpstat.
1846 (If there are multiple step_resume bp's on the list, this function
1847 will arbitrarily pick one.)
1849 It is an error to use this function if BPSTAT doesn't contain a
1850 step_resume breakpoint.
1852 See wait_for_inferior's use of this function. */
1854 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1859 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1861 current_thread
= pid_to_thread_id (inferior_ptid
);
1863 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1865 if ((bsp
->breakpoint_at
!= NULL
) &&
1866 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1867 (bsp
->breakpoint_at
->thread
== current_thread
||
1868 bsp
->breakpoint_at
->thread
== -1))
1869 return bsp
->breakpoint_at
;
1872 error ("Internal error (no step_resume breakpoint found)");
1876 /* Return the breakpoint number of the first breakpoint we are stopped
1877 at. *BSP upon return is a bpstat which points to the remaining
1878 breakpoints stopped at (but which is not guaranteed to be good for
1879 anything but further calls to bpstat_num).
1880 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1883 bpstat_num (bpstat
*bsp
)
1885 struct breakpoint
*b
;
1888 return 0; /* No more breakpoint values */
1891 b
= (*bsp
)->breakpoint_at
;
1892 *bsp
= (*bsp
)->next
;
1894 return -1; /* breakpoint that's been deleted since */
1896 return b
->number
; /* We have its number */
1900 /* Modify BS so that the actions will not be performed. */
1903 bpstat_clear_actions (bpstat bs
)
1905 for (; bs
!= NULL
; bs
= bs
->next
)
1907 free_command_lines (&bs
->commands
);
1908 if (bs
->old_val
!= NULL
)
1910 value_free (bs
->old_val
);
1916 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1919 cleanup_executing_breakpoints (void *ignore
)
1921 executing_breakpoint_commands
= 0;
1924 /* Execute all the commands associated with all the breakpoints at this
1925 location. Any of these commands could cause the process to proceed
1926 beyond this point, etc. We look out for such changes by checking
1927 the global "breakpoint_proceeded" after each command. */
1930 bpstat_do_actions (bpstat
*bsp
)
1933 struct cleanup
*old_chain
;
1934 struct command_line
*cmd
;
1936 /* Avoid endless recursion if a `source' command is contained
1938 if (executing_breakpoint_commands
)
1941 executing_breakpoint_commands
= 1;
1942 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
1945 /* Note that (as of this writing), our callers all appear to
1946 be passing us the address of global stop_bpstat. And, if
1947 our calls to execute_control_command cause the inferior to
1948 proceed, that global (and hence, *bsp) will change.
1950 We must be careful to not touch *bsp unless the inferior
1951 has not proceeded. */
1953 /* This pointer will iterate over the list of bpstat's. */
1956 breakpoint_proceeded
= 0;
1957 for (; bs
!= NULL
; bs
= bs
->next
)
1962 execute_control_command (cmd
);
1964 if (breakpoint_proceeded
)
1969 if (breakpoint_proceeded
)
1970 /* The inferior is proceeded by the command; bomb out now.
1971 The bpstat chain has been blown away by wait_for_inferior.
1972 But since execution has stopped again, there is a new bpstat
1973 to look at, so start over. */
1976 free_command_lines (&bs
->commands
);
1978 do_cleanups (old_chain
);
1981 /* This is the normal print function for a bpstat. In the future,
1982 much of this logic could (should?) be moved to bpstat_stop_status,
1983 by having it set different print_it values.
1985 Current scheme: When we stop, bpstat_print() is called. It loops
1986 through the bpstat list of things causing this stop, calling the
1987 print_bp_stop_message function on each one. The behavior of the
1988 print_bp_stop_message function depends on the print_it field of
1989 bpstat. If such field so indicates, call this function here.
1991 Return values from this routine (ultimately used by bpstat_print()
1992 and normal_stop() to decide what to do):
1993 PRINT_NOTHING: Means we already printed all we needed to print,
1994 don't print anything else.
1995 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
1996 that something to be followed by a location.
1997 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
1998 that something to be followed by a location.
1999 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2002 static enum print_stop_action
2003 print_it_typical (bpstat bs
)
2005 struct cleanup
*old_chain
, *ui_out_chain
;
2006 struct ui_stream
*stb
;
2007 stb
= ui_out_stream_new (uiout
);
2008 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2009 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2010 which has since been deleted. */
2011 if (bs
->breakpoint_at
== NULL
)
2012 return PRINT_UNKNOWN
;
2014 switch (bs
->breakpoint_at
->type
)
2017 case bp_hardware_breakpoint
:
2018 annotate_breakpoint (bs
->breakpoint_at
->number
);
2019 ui_out_text (uiout
, "\nBreakpoint ");
2020 if (ui_out_is_mi_like_p (uiout
))
2021 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2022 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2023 ui_out_text (uiout
, ", ");
2024 return PRINT_SRC_AND_LOC
;
2027 case bp_shlib_event
:
2028 /* Did we stop because the user set the stop_on_solib_events
2029 variable? (If so, we report this as a generic, "Stopped due
2030 to shlib event" message.) */
2031 printf_filtered ("Stopped due to shared library event\n");
2032 return PRINT_NOTHING
;
2035 case bp_thread_event
:
2036 /* Not sure how we will get here.
2037 GDB should not stop for these breakpoints. */
2038 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2039 return PRINT_NOTHING
;
2042 case bp_overlay_event
:
2043 /* By analogy with the thread event, GDB should not stop for these. */
2044 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2045 return PRINT_NOTHING
;
2049 annotate_catchpoint (bs
->breakpoint_at
->number
);
2050 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2051 printf_filtered ("loaded");
2052 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2053 return PRINT_SRC_AND_LOC
;
2056 case bp_catch_unload
:
2057 annotate_catchpoint (bs
->breakpoint_at
->number
);
2058 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2059 printf_filtered ("unloaded");
2060 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2061 return PRINT_SRC_AND_LOC
;
2065 annotate_catchpoint (bs
->breakpoint_at
->number
);
2066 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2067 printf_filtered ("forked");
2068 printf_filtered (" process %d), ",
2069 bs
->breakpoint_at
->forked_inferior_pid
);
2070 return PRINT_SRC_AND_LOC
;
2073 case bp_catch_vfork
:
2074 annotate_catchpoint (bs
->breakpoint_at
->number
);
2075 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2076 printf_filtered ("vforked");
2077 printf_filtered (" process %d), ",
2078 bs
->breakpoint_at
->forked_inferior_pid
);
2079 return PRINT_SRC_AND_LOC
;
2083 annotate_catchpoint (bs
->breakpoint_at
->number
);
2084 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2085 bs
->breakpoint_at
->number
,
2086 bs
->breakpoint_at
->exec_pathname
);
2087 return PRINT_SRC_AND_LOC
;
2090 case bp_catch_catch
:
2091 if (current_exception_event
&&
2092 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2094 annotate_catchpoint (bs
->breakpoint_at
->number
);
2095 printf_filtered ("\nCatchpoint %d (exception caught), ",
2096 bs
->breakpoint_at
->number
);
2097 printf_filtered ("throw location ");
2098 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2099 printf_filtered ("%s:%d",
2100 CURRENT_EXCEPTION_THROW_FILE
,
2101 CURRENT_EXCEPTION_THROW_LINE
);
2103 printf_filtered ("unknown");
2105 printf_filtered (", catch location ");
2106 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2107 printf_filtered ("%s:%d",
2108 CURRENT_EXCEPTION_CATCH_FILE
,
2109 CURRENT_EXCEPTION_CATCH_LINE
);
2111 printf_filtered ("unknown");
2113 printf_filtered ("\n");
2114 /* don't bother to print location frame info */
2115 return PRINT_SRC_ONLY
;
2119 /* really throw, some other bpstat will handle it */
2120 return PRINT_UNKNOWN
;
2124 case bp_catch_throw
:
2125 if (current_exception_event
&&
2126 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2128 annotate_catchpoint (bs
->breakpoint_at
->number
);
2129 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2130 bs
->breakpoint_at
->number
);
2131 printf_filtered ("throw location ");
2132 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2133 printf_filtered ("%s:%d",
2134 CURRENT_EXCEPTION_THROW_FILE
,
2135 CURRENT_EXCEPTION_THROW_LINE
);
2137 printf_filtered ("unknown");
2139 printf_filtered (", catch location ");
2140 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2141 printf_filtered ("%s:%d",
2142 CURRENT_EXCEPTION_CATCH_FILE
,
2143 CURRENT_EXCEPTION_CATCH_LINE
);
2145 printf_filtered ("unknown");
2147 printf_filtered ("\n");
2148 /* don't bother to print location frame info */
2149 return PRINT_SRC_ONLY
;
2153 /* really catch, some other bpstat will handle it */
2154 return PRINT_UNKNOWN
;
2159 case bp_hardware_watchpoint
:
2160 if (bs
->old_val
!= NULL
)
2162 annotate_watchpoint (bs
->breakpoint_at
->number
);
2163 if (ui_out_is_mi_like_p (uiout
))
2164 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2165 mention (bs
->breakpoint_at
);
2166 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2167 ui_out_text (uiout
, "\nOld value = ");
2168 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2169 ui_out_field_stream (uiout
, "old", stb
);
2170 ui_out_text (uiout
, "\nNew value = ");
2171 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2172 ui_out_field_stream (uiout
, "new", stb
);
2173 do_cleanups (ui_out_chain
);
2174 ui_out_text (uiout
, "\n");
2175 value_free (bs
->old_val
);
2178 /* More than one watchpoint may have been triggered. */
2179 return PRINT_UNKNOWN
;
2182 case bp_read_watchpoint
:
2183 if (ui_out_is_mi_like_p (uiout
))
2184 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2185 mention (bs
->breakpoint_at
);
2186 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2187 ui_out_text (uiout
, "\nValue = ");
2188 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2189 ui_out_field_stream (uiout
, "value", stb
);
2190 do_cleanups (ui_out_chain
);
2191 ui_out_text (uiout
, "\n");
2192 return PRINT_UNKNOWN
;
2195 case bp_access_watchpoint
:
2196 if (bs
->old_val
!= NULL
)
2198 annotate_watchpoint (bs
->breakpoint_at
->number
);
2199 if (ui_out_is_mi_like_p (uiout
))
2200 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2201 mention (bs
->breakpoint_at
);
2202 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2203 ui_out_text (uiout
, "\nOld value = ");
2204 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2205 ui_out_field_stream (uiout
, "old", stb
);
2206 value_free (bs
->old_val
);
2208 ui_out_text (uiout
, "\nNew value = ");
2212 mention (bs
->breakpoint_at
);
2213 if (ui_out_is_mi_like_p (uiout
))
2214 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2215 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2216 ui_out_text (uiout
, "\nValue = ");
2218 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2219 ui_out_field_stream (uiout
, "new", stb
);
2220 do_cleanups (ui_out_chain
);
2221 ui_out_text (uiout
, "\n");
2222 return PRINT_UNKNOWN
;
2225 /* Fall through, we don't deal with these types of breakpoints
2229 if (ui_out_is_mi_like_p (uiout
))
2230 ui_out_field_string (uiout
, "reason", "function-finished");
2231 return PRINT_UNKNOWN
;
2235 if (ui_out_is_mi_like_p (uiout
))
2236 ui_out_field_string (uiout
, "reason", "location-reached");
2237 return PRINT_UNKNOWN
;
2242 case bp_longjmp_resume
:
2243 case bp_step_resume
:
2244 case bp_through_sigtramp
:
2245 case bp_watchpoint_scope
:
2248 return PRINT_UNKNOWN
;
2252 /* Generic routine for printing messages indicating why we
2253 stopped. The behavior of this function depends on the value
2254 'print_it' in the bpstat structure. Under some circumstances we
2255 may decide not to print anything here and delegate the task to
2258 static enum print_stop_action
2259 print_bp_stop_message (bpstat bs
)
2261 switch (bs
->print_it
)
2264 /* Nothing should be printed for this bpstat entry. */
2265 return PRINT_UNKNOWN
;
2269 /* We still want to print the frame, but we already printed the
2270 relevant messages. */
2271 return PRINT_SRC_AND_LOC
;
2274 case print_it_normal
:
2275 /* Normal case, we handle everything in print_it_typical. */
2276 return print_it_typical (bs
);
2279 internal_error (__FILE__
, __LINE__
,
2280 "print_bp_stop_message: unrecognized enum value");
2285 /* Print a message indicating what happened. This is called from
2286 normal_stop(). The input to this routine is the head of the bpstat
2287 list - a list of the eventpoints that caused this stop. This
2288 routine calls the generic print routine for printing a message
2289 about reasons for stopping. This will print (for example) the
2290 "Breakpoint n," part of the output. The return value of this
2293 PRINT_UNKNOWN: Means we printed nothing
2294 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2295 code to print the location. An example is
2296 "Breakpoint 1, " which should be followed by
2298 PRINT_SRC_ONLY: Means we printed something, but there is no need
2299 to also print the location part of the message.
2300 An example is the catch/throw messages, which
2301 don't require a location appended to the end.
2302 PRINT_NOTHING: We have done some printing and we don't need any
2303 further info to be printed.*/
2305 enum print_stop_action
2306 bpstat_print (bpstat bs
)
2310 /* Maybe another breakpoint in the chain caused us to stop.
2311 (Currently all watchpoints go on the bpstat whether hit or not.
2312 That probably could (should) be changed, provided care is taken
2313 with respect to bpstat_explains_signal). */
2314 for (; bs
; bs
= bs
->next
)
2316 val
= print_bp_stop_message (bs
);
2317 if (val
== PRINT_SRC_ONLY
2318 || val
== PRINT_SRC_AND_LOC
2319 || val
== PRINT_NOTHING
)
2323 /* We reached the end of the chain, or we got a null BS to start
2324 with and nothing was printed. */
2325 return PRINT_UNKNOWN
;
2328 /* Evaluate the expression EXP and return 1 if value is zero.
2329 This is used inside a catch_errors to evaluate the breakpoint condition.
2330 The argument is a "struct expression *" that has been cast to char * to
2331 make it pass through catch_errors. */
2334 breakpoint_cond_eval (void *exp
)
2336 struct value
*mark
= value_mark ();
2337 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2338 value_free_to_mark (mark
);
2342 /* Allocate a new bpstat and chain it to the current one. */
2345 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2349 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2351 bs
->breakpoint_at
= b
;
2352 /* If the condition is false, etc., don't do the commands. */
2353 bs
->commands
= NULL
;
2355 bs
->print_it
= print_it_normal
;
2359 /* Possible return values for watchpoint_check (this can't be an enum
2360 because of check_errors). */
2361 /* The watchpoint has been deleted. */
2362 #define WP_DELETED 1
2363 /* The value has changed. */
2364 #define WP_VALUE_CHANGED 2
2365 /* The value has not changed. */
2366 #define WP_VALUE_NOT_CHANGED 3
2368 #define BP_TEMPFLAG 1
2369 #define BP_HARDWAREFLAG 2
2371 /* Check watchpoint condition. */
2374 watchpoint_check (void *p
)
2376 bpstat bs
= (bpstat
) p
;
2377 struct breakpoint
*b
;
2378 struct frame_info
*fr
;
2379 int within_current_scope
;
2381 b
= bs
->breakpoint_at
;
2383 if (b
->exp_valid_block
== NULL
)
2384 within_current_scope
= 1;
2387 /* There is no current frame at this moment. If we're going to have
2388 any chance of handling watchpoints on local variables, we'll need
2389 the frame chain (so we can determine if we're in scope). */
2390 reinit_frame_cache ();
2391 fr
= frame_find_by_id (b
->watchpoint_frame
);
2392 within_current_scope
= (fr
!= NULL
);
2393 /* in_function_epilogue_p() returns a non-zero value if we're still
2394 in the function but the stack frame has already been invalidated.
2395 Since we can't rely on the values of local variables after the
2396 stack has been destroyed, we are treating the watchpoint in that
2397 state as `not changed' without further checking. */
2398 if (within_current_scope
&& fr
== get_current_frame ()
2399 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2400 return WP_VALUE_NOT_CHANGED
;
2401 if (within_current_scope
)
2402 /* If we end up stopping, the current frame will get selected
2403 in normal_stop. So this call to select_frame won't affect
2408 if (within_current_scope
)
2410 /* We use value_{,free_to_}mark because it could be a
2411 *long* time before we return to the command level and
2412 call free_all_values. We can't call free_all_values because
2413 we might be in the middle of evaluating a function call. */
2415 struct value
*mark
= value_mark ();
2416 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2417 if (!value_equal (b
->val
, new_val
))
2419 release_value (new_val
);
2420 value_free_to_mark (mark
);
2421 bs
->old_val
= b
->val
;
2423 /* We will stop here */
2424 return WP_VALUE_CHANGED
;
2428 /* Nothing changed, don't do anything. */
2429 value_free_to_mark (mark
);
2430 /* We won't stop here */
2431 return WP_VALUE_NOT_CHANGED
;
2436 /* This seems like the only logical thing to do because
2437 if we temporarily ignored the watchpoint, then when
2438 we reenter the block in which it is valid it contains
2439 garbage (in the case of a function, it may have two
2440 garbage values, one before and one after the prologue).
2441 So we can't even detect the first assignment to it and
2442 watch after that (since the garbage may or may not equal
2443 the first value assigned). */
2444 /* We print all the stop information in print_it_typical(), but
2445 in this case, by the time we call print_it_typical() this bp
2446 will be deleted already. So we have no choice but print the
2447 information here. */
2448 if (ui_out_is_mi_like_p (uiout
))
2449 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2450 ui_out_text (uiout
, "\nWatchpoint ");
2451 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2452 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2453 which its expression is valid.\n");
2455 if (b
->related_breakpoint
)
2456 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2457 b
->disposition
= disp_del_at_next_stop
;
2463 /* Get a bpstat associated with having just stopped at address *PC
2464 and frame address CORE_ADDRESS. Update *PC to point at the
2465 breakpoint (if we hit a breakpoint). NOT_A_SW_BREAKPOINT is nonzero
2466 if this is known to not be a real breakpoint (it could still be a
2467 watchpoint, though). */
2469 /* Determine whether we stopped at a breakpoint, etc, or whether we
2470 don't understand this stop. Result is a chain of bpstat's such that:
2472 if we don't understand the stop, the result is a null pointer.
2474 if we understand why we stopped, the result is not null.
2476 Each element of the chain refers to a particular breakpoint or
2477 watchpoint at which we have stopped. (We may have stopped for
2478 several reasons concurrently.)
2480 Each element of the chain has valid next, breakpoint_at,
2481 commands, FIXME??? fields. */
2484 bpstat_stop_status (CORE_ADDR
*pc
, int not_a_sw_breakpoint
)
2486 register struct breakpoint
*b
, *temp
;
2488 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2489 int real_breakpoint
= 0;
2490 /* Root of the chain of bpstat's */
2491 struct bpstats root_bs
[1];
2492 /* Pointer to the last thing in the chain currently. */
2493 bpstat bs
= root_bs
;
2494 static char message1
[] =
2495 "Error evaluating expression for watchpoint %d\n";
2496 char message
[sizeof (message1
) + 30 /* slop */ ];
2498 /* Get the address where the breakpoint would have been. The
2499 "not_a_sw_breakpoint" argument is meant to distinguish between a
2500 breakpoint trap event and a trace/singlestep trap event. For a
2501 trace/singlestep trap event, we would not want to subtract
2502 DECR_PC_AFTER_BREAK from the PC. */
2504 bp_addr
= *pc
- (not_a_sw_breakpoint
? 0 : DECR_PC_AFTER_BREAK
);
2506 ALL_BREAKPOINTS_SAFE (b
, temp
)
2508 if (b
->enable_state
== bp_disabled
2509 || b
->enable_state
== bp_shlib_disabled
2510 || b
->enable_state
== bp_call_disabled
)
2513 if (b
->type
!= bp_watchpoint
2514 && b
->type
!= bp_hardware_watchpoint
2515 && b
->type
!= bp_read_watchpoint
2516 && b
->type
!= bp_access_watchpoint
2517 && b
->type
!= bp_hardware_breakpoint
2518 && b
->type
!= bp_catch_fork
2519 && b
->type
!= bp_catch_vfork
2520 && b
->type
!= bp_catch_exec
2521 && b
->type
!= bp_catch_catch
2522 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2524 if (b
->address
!= bp_addr
) /* address doesn't match */
2526 if (overlay_debugging
/* unmapped overlay section */
2527 && section_is_overlay (b
->section
)
2528 && !section_is_mapped (b
->section
))
2532 if (b
->type
== bp_hardware_breakpoint
)
2534 if (b
->address
!= (*pc
- DECR_PC_AFTER_HW_BREAK
))
2536 if (overlay_debugging
/* unmapped overlay section */
2537 && section_is_overlay (b
->section
)
2538 && !section_is_mapped (b
->section
))
2542 /* Is this a catchpoint of a load or unload? If so, did we
2543 get a load or unload of the specified library? If not,
2545 if ((b
->type
== bp_catch_load
)
2546 #if defined(SOLIB_HAVE_LOAD_EVENT)
2547 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2548 || ((b
->dll_pathname
!= NULL
)
2549 && (strcmp (b
->dll_pathname
,
2550 SOLIB_LOADED_LIBRARY_PATHNAME (
2551 PIDGET (inferior_ptid
)))
2557 if ((b
->type
== bp_catch_unload
)
2558 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2559 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2560 || ((b
->dll_pathname
!= NULL
)
2561 && (strcmp (b
->dll_pathname
,
2562 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2563 PIDGET (inferior_ptid
)))
2569 if ((b
->type
== bp_catch_fork
)
2570 && !inferior_has_forked (PIDGET (inferior_ptid
),
2571 &b
->forked_inferior_pid
))
2574 if ((b
->type
== bp_catch_vfork
)
2575 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2576 &b
->forked_inferior_pid
))
2579 if ((b
->type
== bp_catch_exec
)
2580 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2583 if (ep_is_exception_catchpoint (b
) &&
2584 !(current_exception_event
= target_get_current_exception_event ()))
2587 /* Come here if it's a watchpoint, or if the break address matches */
2589 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2591 /* Watchpoints may change this, if not found to have triggered. */
2595 sprintf (message
, message1
, b
->number
);
2596 if (b
->type
== bp_watchpoint
||
2597 b
->type
== bp_hardware_watchpoint
)
2599 switch (catch_errors (watchpoint_check
, bs
, message
,
2603 /* We've already printed what needs to be printed. */
2604 /* Actually this is superfluous, because by the time we
2605 call print_it_typical() the wp will be already deleted,
2606 and the function will return immediately. */
2607 bs
->print_it
= print_it_done
;
2610 case WP_VALUE_CHANGED
:
2614 case WP_VALUE_NOT_CHANGED
:
2616 bs
->print_it
= print_it_noop
;
2623 /* Error from catch_errors. */
2624 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2625 if (b
->related_breakpoint
)
2626 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2627 b
->disposition
= disp_del_at_next_stop
;
2628 /* We've already printed what needs to be printed. */
2629 bs
->print_it
= print_it_done
;
2635 else if (b
->type
== bp_read_watchpoint
||
2636 b
->type
== bp_access_watchpoint
)
2642 addr
= target_stopped_data_address ();
2645 for (v
= b
->val_chain
; v
; v
= v
->next
)
2647 if (VALUE_LVAL (v
) == lval_memory
2648 && ! VALUE_LAZY (v
))
2650 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
2652 if (v
== b
->val_chain
2653 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2654 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2658 vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
2659 /* Exact match not required. Within range is
2661 if (addr
>= vaddr
&&
2662 addr
< vaddr
+ TYPE_LENGTH (VALUE_TYPE (v
)))
2668 switch (catch_errors (watchpoint_check
, bs
, message
,
2672 /* We've already printed what needs to be printed. */
2673 bs
->print_it
= print_it_done
;
2676 case WP_VALUE_CHANGED
:
2677 if (b
->type
== bp_read_watchpoint
)
2679 /* Don't stop: read watchpoints shouldn't fire if
2680 the value has changed. This is for targets which
2681 cannot set read-only watchpoints. */
2682 bs
->print_it
= print_it_noop
;
2688 case WP_VALUE_NOT_CHANGED
:
2695 /* Error from catch_errors. */
2696 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2697 if (b
->related_breakpoint
)
2698 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2699 b
->disposition
= disp_del_at_next_stop
;
2700 /* We've already printed what needs to be printed. */
2701 bs
->print_it
= print_it_done
;
2704 else /* found == 0 */
2706 /* This is a case where some watchpoint(s) triggered,
2707 but not at the address of this watchpoint (FOUND
2708 was left zero). So don't print anything for this
2710 bs
->print_it
= print_it_noop
;
2717 /* By definition, an encountered breakpoint is a triggered
2721 real_breakpoint
= 1;
2724 if (frame_id_p (b
->frame_id
)
2725 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2729 int value_is_zero
= 0;
2733 /* Need to select the frame, with all that implies
2734 so that the conditions will have the right context. */
2735 select_frame (get_current_frame ());
2737 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2738 "Error in testing breakpoint condition:\n",
2740 /* FIXME-someday, should give breakpoint # */
2743 if (b
->cond
&& value_is_zero
)
2746 /* Don't consider this a hit. */
2749 else if (b
->ignore_count
> 0)
2752 annotate_ignore_count_change ();
2757 /* We will stop here */
2758 if (b
->disposition
== disp_disable
)
2759 b
->enable_state
= bp_disabled
;
2760 bs
->commands
= copy_command_lines (b
->commands
);
2764 (STREQ ("silent", bs
->commands
->line
) ||
2765 (xdb_commands
&& STREQ ("Q", bs
->commands
->line
))))
2767 bs
->commands
= bs
->commands
->next
;
2772 /* Print nothing for this entry if we dont stop or if we dont print. */
2773 if (bs
->stop
== 0 || bs
->print
== 0)
2774 bs
->print_it
= print_it_noop
;
2777 bs
->next
= NULL
; /* Terminate the chain */
2778 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2780 if (real_breakpoint
&& bs
)
2782 if (bs
->breakpoint_at
->type
== bp_hardware_breakpoint
)
2784 if (DECR_PC_AFTER_HW_BREAK
!= 0)
2786 *pc
= *pc
- DECR_PC_AFTER_HW_BREAK
;
2792 if (DECR_PC_AFTER_BREAK
!= 0 || must_shift_inst_regs
)
2795 #if defined (SHIFT_INST_REGS)
2797 #else /* No SHIFT_INST_REGS. */
2799 #endif /* No SHIFT_INST_REGS. */
2804 /* The value of a hardware watchpoint hasn't changed, but the
2805 intermediate memory locations we are watching may have. */
2806 if (bs
&& !bs
->stop
&&
2807 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2808 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2809 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2811 remove_breakpoints ();
2812 insert_breakpoints ();
2817 /* Tell what to do about this bpstat. */
2819 bpstat_what (bpstat bs
)
2821 /* Classify each bpstat as one of the following. */
2824 /* This bpstat element has no effect on the main_action. */
2827 /* There was a watchpoint, stop but don't print. */
2830 /* There was a watchpoint, stop and print. */
2833 /* There was a breakpoint but we're not stopping. */
2836 /* There was a breakpoint, stop but don't print. */
2839 /* There was a breakpoint, stop and print. */
2842 /* We hit the longjmp breakpoint. */
2845 /* We hit the longjmp_resume breakpoint. */
2848 /* We hit the step_resume breakpoint. */
2851 /* We hit the through_sigtramp breakpoint. */
2854 /* We hit the shared library event breakpoint. */
2857 /* We caught a shared library event. */
2860 /* This is just used to count how many enums there are. */
2864 /* Here is the table which drives this routine. So that we can
2865 format it pretty, we define some abbreviations for the
2866 enum bpstat_what codes. */
2867 #define kc BPSTAT_WHAT_KEEP_CHECKING
2868 #define ss BPSTAT_WHAT_STOP_SILENT
2869 #define sn BPSTAT_WHAT_STOP_NOISY
2870 #define sgl BPSTAT_WHAT_SINGLE
2871 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2872 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2873 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2874 #define sr BPSTAT_WHAT_STEP_RESUME
2875 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2876 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2877 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2879 /* "Can't happen." Might want to print an error message.
2880 abort() is not out of the question, but chances are GDB is just
2881 a bit confused, not unusable. */
2882 #define err BPSTAT_WHAT_STOP_NOISY
2884 /* Given an old action and a class, come up with a new action. */
2885 /* One interesting property of this table is that wp_silent is the same
2886 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2887 after stopping, the check for whether to step over a breakpoint
2888 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2889 reference to how we stopped. We retain separate wp_silent and
2890 bp_silent codes in case we want to change that someday.
2892 Another possibly interesting property of this table is that
2893 there's a partial ordering, priority-like, of the actions. Once
2894 you've decided that some action is appropriate, you'll never go
2895 back and decide something of a lower priority is better. The
2898 kc < clr sgl shl shlr slr sn sr ss ts
2899 sgl < clrs shl shlr slr sn sr ss ts
2900 slr < err shl shlr sn sr ss ts
2901 clr < clrs err shl shlr sn sr ss ts
2902 clrs < err shl shlr sn sr ss ts
2903 ss < shl shlr sn sr ts
2910 What I think this means is that we don't need a damned table
2911 here. If you just put the rows and columns in the right order,
2912 it'd look awfully regular. We could simply walk the bpstat list
2913 and choose the highest priority action we find, with a little
2914 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2915 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2916 is messy anyway). */
2918 /* step_resume entries: a step resume breakpoint overrides another
2919 breakpoint of signal handling (see comment in wait_for_inferior
2920 at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
2921 /* We handle the through_sigtramp_breakpoint the same way; having both
2922 one of those and a step_resume_breakpoint is probably very rare (?). */
2924 static const enum bpstat_what_main_action
2925 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
2928 /* kc ss sn sgl slr clr clrs sr ts shl shlr
2931 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
2933 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
2935 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
2937 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
2939 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
2941 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
2943 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
2945 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
2947 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
2949 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
2951 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
2953 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
2968 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
2969 struct bpstat_what retval
;
2971 retval
.call_dummy
= 0;
2972 for (; bs
!= NULL
; bs
= bs
->next
)
2974 enum class bs_class
= no_effect
;
2975 if (bs
->breakpoint_at
== NULL
)
2976 /* I suspect this can happen if it was a momentary breakpoint
2977 which has since been deleted. */
2979 switch (bs
->breakpoint_at
->type
)
2985 case bp_hardware_breakpoint
:
2991 bs_class
= bp_noisy
;
2993 bs_class
= bp_silent
;
2996 bs_class
= bp_nostop
;
2999 case bp_hardware_watchpoint
:
3000 case bp_read_watchpoint
:
3001 case bp_access_watchpoint
:
3005 bs_class
= wp_noisy
;
3007 bs_class
= wp_silent
;
3010 /* There was a watchpoint, but we're not stopping.
3011 This requires no further action. */
3012 bs_class
= no_effect
;
3015 bs_class
= long_jump
;
3017 case bp_longjmp_resume
:
3018 bs_class
= long_resume
;
3020 case bp_step_resume
:
3023 bs_class
= step_resume
;
3026 /* It is for the wrong frame. */
3027 bs_class
= bp_nostop
;
3029 case bp_through_sigtramp
:
3030 bs_class
= through_sig
;
3032 case bp_watchpoint_scope
:
3033 bs_class
= bp_nostop
;
3035 case bp_shlib_event
:
3036 bs_class
= shlib_event
;
3038 case bp_thread_event
:
3039 case bp_overlay_event
:
3040 bs_class
= bp_nostop
;
3043 case bp_catch_unload
:
3044 /* Only if this catchpoint triggered should we cause the
3045 step-out-of-dld behaviour. Otherwise, we ignore this
3048 bs_class
= catch_shlib_event
;
3050 bs_class
= no_effect
;
3053 case bp_catch_vfork
:
3058 bs_class
= bp_noisy
;
3060 bs_class
= bp_silent
;
3063 /* There was a catchpoint, but we're not stopping.
3064 This requires no further action. */
3065 bs_class
= no_effect
;
3067 case bp_catch_catch
:
3068 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3069 bs_class
= bp_nostop
;
3071 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3073 case bp_catch_throw
:
3074 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3075 bs_class
= bp_nostop
;
3077 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3080 /* Make sure the action is stop (silent or noisy),
3081 so infrun.c pops the dummy frame. */
3082 bs_class
= bp_silent
;
3083 retval
.call_dummy
= 1;
3086 current_action
= table
[(int) bs_class
][(int) current_action
];
3088 retval
.main_action
= current_action
;
3092 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3093 without hardware support). This isn't related to a specific bpstat,
3094 just to things like whether watchpoints are set. */
3097 bpstat_should_step (void)
3099 struct breakpoint
*b
;
3101 if (b
->enable_state
== bp_enabled
&& b
->type
== bp_watchpoint
)
3106 /* Nonzero if there are enabled hardware watchpoints. */
3108 bpstat_have_active_hw_watchpoints (void)
3110 struct breakpoint
*b
;
3112 if ((b
->enable_state
== bp_enabled
) &&
3114 ((b
->type
== bp_hardware_watchpoint
) ||
3115 (b
->type
== bp_read_watchpoint
) ||
3116 (b
->type
== bp_access_watchpoint
)))
3122 /* Given a bpstat that records zero or more triggered eventpoints, this
3123 function returns another bpstat which contains only the catchpoints
3124 on that first list, if any. */
3126 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3128 struct bpstats root_bs
[1];
3129 bpstat bs
= root_bs
;
3130 struct breakpoint
*ep
;
3133 bpstat_clear (cp_list
);
3134 root_bs
->next
= NULL
;
3136 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3138 /* Is this eventpoint a catchpoint? If not, ignore it. */
3139 ep
= ep_list
->breakpoint_at
;
3142 if ((ep
->type
!= bp_catch_load
) &&
3143 (ep
->type
!= bp_catch_unload
) &&
3144 (ep
->type
!= bp_catch_catch
) &&
3145 (ep
->type
!= bp_catch_throw
))
3146 /* pai: (temp) ADD fork/vfork here!! */
3149 /* Yes; add it to the list. */
3150 bs
= bpstat_alloc (ep
, bs
);
3155 #if defined(SOLIB_ADD)
3156 /* Also, for each triggered catchpoint, tag it with the name of
3157 the library that caused this trigger. (We copy the name now,
3158 because it's only guaranteed to be available NOW, when the
3159 catchpoint triggers. Clients who may wish to know the name
3160 later must get it from the catchpoint itself.) */
3161 if (ep
->triggered_dll_pathname
!= NULL
)
3162 xfree (ep
->triggered_dll_pathname
);
3163 if (ep
->type
== bp_catch_load
)
3164 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3165 PIDGET (inferior_ptid
));
3167 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3168 PIDGET (inferior_ptid
));
3170 dll_pathname
= NULL
;
3174 ep
->triggered_dll_pathname
= (char *)
3175 xmalloc (strlen (dll_pathname
) + 1);
3176 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3179 ep
->triggered_dll_pathname
= NULL
;
3185 /* Print B to gdb_stdout. */
3187 print_one_breakpoint (struct breakpoint
*b
,
3188 CORE_ADDR
*last_addr
)
3190 register struct command_line
*l
;
3191 register struct symbol
*sym
;
3192 struct ep_type_description
3197 static struct ep_type_description bptypes
[] =
3199 {bp_none
, "?deleted?"},
3200 {bp_breakpoint
, "breakpoint"},
3201 {bp_hardware_breakpoint
, "hw breakpoint"},
3202 {bp_until
, "until"},
3203 {bp_finish
, "finish"},
3204 {bp_watchpoint
, "watchpoint"},
3205 {bp_hardware_watchpoint
, "hw watchpoint"},
3206 {bp_read_watchpoint
, "read watchpoint"},
3207 {bp_access_watchpoint
, "acc watchpoint"},
3208 {bp_longjmp
, "longjmp"},
3209 {bp_longjmp_resume
, "longjmp resume"},
3210 {bp_step_resume
, "step resume"},
3211 {bp_through_sigtramp
, "sigtramp"},
3212 {bp_watchpoint_scope
, "watchpoint scope"},
3213 {bp_call_dummy
, "call dummy"},
3214 {bp_shlib_event
, "shlib events"},
3215 {bp_thread_event
, "thread events"},
3216 {bp_overlay_event
, "overlay events"},
3217 {bp_catch_load
, "catch load"},
3218 {bp_catch_unload
, "catch unload"},
3219 {bp_catch_fork
, "catch fork"},
3220 {bp_catch_vfork
, "catch vfork"},
3221 {bp_catch_exec
, "catch exec"},
3222 {bp_catch_catch
, "catch catch"},
3223 {bp_catch_throw
, "catch throw"}
3226 static char *bpdisps
[] =
3227 {"del", "dstp", "dis", "keep"};
3228 static char bpenables
[] = "nynny";
3229 char wrap_indent
[80];
3230 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3231 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3232 struct cleanup
*bkpt_chain
;
3235 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3239 ui_out_field_int (uiout
, "number", b
->number
);
3243 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3244 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3245 internal_error (__FILE__
, __LINE__
,
3246 "bptypes table does not describe type #%d.",
3248 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3252 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3256 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3257 ui_out_spaces (uiout
, 2);
3260 strcpy (wrap_indent
, " ");
3263 if (TARGET_ADDR_BIT
<= 32)
3264 strcat (wrap_indent
, " ");
3266 strcat (wrap_indent
, " ");
3271 internal_error (__FILE__
, __LINE__
,
3272 "print_one_breakpoint: bp_none encountered\n");
3276 case bp_hardware_watchpoint
:
3277 case bp_read_watchpoint
:
3278 case bp_access_watchpoint
:
3279 /* Field 4, the address, is omitted (which makes the columns
3280 not line up too nicely with the headers, but the effect
3281 is relatively readable). */
3283 ui_out_field_skip (uiout
, "addr");
3285 print_expression (b
->exp
, stb
->stream
);
3286 ui_out_field_stream (uiout
, "what", stb
);
3290 case bp_catch_unload
:
3291 /* Field 4, the address, is omitted (which makes the columns
3292 not line up too nicely with the headers, but the effect
3293 is relatively readable). */
3295 ui_out_field_skip (uiout
, "addr");
3297 if (b
->dll_pathname
== NULL
)
3299 ui_out_field_string (uiout
, "what", "<any library>");
3300 ui_out_spaces (uiout
, 1);
3304 ui_out_text (uiout
, "library \"");
3305 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3306 ui_out_text (uiout
, "\" ");
3311 case bp_catch_vfork
:
3312 /* Field 4, the address, is omitted (which makes the columns
3313 not line up too nicely with the headers, but the effect
3314 is relatively readable). */
3316 ui_out_field_skip (uiout
, "addr");
3318 if (b
->forked_inferior_pid
!= 0)
3320 ui_out_text (uiout
, "process ");
3321 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3322 ui_out_spaces (uiout
, 1);
3326 /* Field 4, the address, is omitted (which makes the columns
3327 not line up too nicely with the headers, but the effect
3328 is relatively readable). */
3330 ui_out_field_skip (uiout
, "addr");
3332 if (b
->exec_pathname
!= NULL
)
3334 ui_out_text (uiout
, "program \"");
3335 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3336 ui_out_text (uiout
, "\" ");
3340 case bp_catch_catch
:
3341 /* Field 4, the address, is omitted (which makes the columns
3342 not line up too nicely with the headers, but the effect
3343 is relatively readable). */
3345 ui_out_field_skip (uiout
, "addr");
3347 ui_out_field_string (uiout
, "what", "exception catch");
3348 ui_out_spaces (uiout
, 1);
3351 case bp_catch_throw
:
3352 /* Field 4, the address, is omitted (which makes the columns
3353 not line up too nicely with the headers, but the effect
3354 is relatively readable). */
3356 ui_out_field_skip (uiout
, "addr");
3358 ui_out_field_string (uiout
, "what", "exception throw");
3359 ui_out_spaces (uiout
, 1);
3363 case bp_hardware_breakpoint
:
3367 case bp_longjmp_resume
:
3368 case bp_step_resume
:
3369 case bp_through_sigtramp
:
3370 case bp_watchpoint_scope
:
3372 case bp_shlib_event
:
3373 case bp_thread_event
:
3374 case bp_overlay_event
:
3378 ui_out_field_core_addr (uiout
, "addr", b
->address
);
3381 *last_addr
= b
->address
;
3384 sym
= find_pc_sect_function (b
->address
, b
->section
);
3387 ui_out_text (uiout
, "in ");
3388 ui_out_field_string (uiout
, "func",
3389 SYMBOL_SOURCE_NAME (sym
));
3390 ui_out_wrap_hint (uiout
, wrap_indent
);
3391 ui_out_text (uiout
, " at ");
3393 ui_out_field_string (uiout
, "file", b
->source_file
);
3394 ui_out_text (uiout
, ":");
3395 ui_out_field_int (uiout
, "line", b
->line_number
);
3399 print_address_symbolic (b
->address
, stb
->stream
, demangle
, "");
3400 ui_out_field_stream (uiout
, "at", stb
);
3405 if (b
->thread
!= -1)
3407 /* FIXME: This seems to be redundant and lost here; see the
3408 "stop only in" line a little further down. */
3409 ui_out_text (uiout
, " thread ");
3410 ui_out_field_int (uiout
, "thread", b
->thread
);
3413 ui_out_text (uiout
, "\n");
3415 if (frame_id_p (b
->frame_id
))
3418 ui_out_text (uiout
, "\tstop only in stack frame at ");
3419 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3421 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.base
);
3422 ui_out_text (uiout
, "\n");
3428 ui_out_text (uiout
, "\tstop only if ");
3429 print_expression (b
->cond
, stb
->stream
);
3430 ui_out_field_stream (uiout
, "cond", stb
);
3431 ui_out_text (uiout
, "\n");
3434 if (b
->thread
!= -1)
3436 /* FIXME should make an annotation for this */
3437 ui_out_text (uiout
, "\tstop only in thread ");
3438 ui_out_field_int (uiout
, "thread", b
->thread
);
3439 ui_out_text (uiout
, "\n");
3442 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3444 /* FIXME should make an annotation for this */
3445 if (ep_is_catchpoint (b
))
3446 ui_out_text (uiout
, "\tcatchpoint");
3448 ui_out_text (uiout
, "\tbreakpoint");
3449 ui_out_text (uiout
, " already hit ");
3450 ui_out_field_int (uiout
, "times", b
->hit_count
);
3451 if (b
->hit_count
== 1)
3452 ui_out_text (uiout
, " time\n");
3454 ui_out_text (uiout
, " times\n");
3457 /* Output the count also if it is zero, but only if this is
3458 mi. FIXME: Should have a better test for this. */
3459 if (ui_out_is_mi_like_p (uiout
))
3460 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3461 ui_out_field_int (uiout
, "times", b
->hit_count
);
3463 if (b
->ignore_count
)
3466 ui_out_text (uiout
, "\tignore next ");
3467 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3468 ui_out_text (uiout
, " hits\n");
3471 if ((l
= b
->commands
))
3473 struct cleanup
*script_chain
;
3476 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3477 print_command_lines (uiout
, l
, 4);
3478 do_cleanups (script_chain
);
3480 do_cleanups (bkpt_chain
);
3481 do_cleanups (old_chain
);
3484 struct captured_breakpoint_query_args
3490 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3492 struct captured_breakpoint_query_args
*args
= data
;
3493 register struct breakpoint
*b
;
3494 CORE_ADDR dummy_addr
= 0;
3497 if (args
->bnum
== b
->number
)
3499 print_one_breakpoint (b
, &dummy_addr
);
3507 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
)
3509 struct captured_breakpoint_query_args args
;
3511 /* For the moment we don't trust print_one_breakpoint() to not throw
3513 return catch_exceptions (uiout
, do_captured_breakpoint_query
, &args
,
3514 NULL
, RETURN_MASK_ALL
);
3517 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3518 catchpoints, et.al.). */
3521 user_settable_breakpoint (const struct breakpoint
*b
)
3523 return (b
->type
== bp_breakpoint
3524 || b
->type
== bp_catch_load
3525 || b
->type
== bp_catch_unload
3526 || b
->type
== bp_catch_fork
3527 || b
->type
== bp_catch_vfork
3528 || b
->type
== bp_catch_exec
3529 || b
->type
== bp_catch_catch
3530 || b
->type
== bp_catch_throw
3531 || b
->type
== bp_hardware_breakpoint
3532 || b
->type
== bp_watchpoint
3533 || b
->type
== bp_read_watchpoint
3534 || b
->type
== bp_access_watchpoint
3535 || b
->type
== bp_hardware_watchpoint
);
3538 /* Print information on user settable breakpoint (watchpoint, etc)
3539 number BNUM. If BNUM is -1 print all user settable breakpoints.
3540 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3543 breakpoint_1 (int bnum
, int allflag
)
3545 register struct breakpoint
*b
;
3546 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3547 int nr_printable_breakpoints
;
3548 struct cleanup
*bkpttbl_chain
;
3550 /* Compute the number of rows in the table. */
3551 nr_printable_breakpoints
= 0;
3554 || bnum
== b
->number
)
3556 if (allflag
|| user_settable_breakpoint (b
))
3557 nr_printable_breakpoints
++;
3562 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3566 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3569 if (nr_printable_breakpoints
> 0)
3570 annotate_breakpoints_headers ();
3571 if (nr_printable_breakpoints
> 0)
3573 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3574 if (nr_printable_breakpoints
> 0)
3576 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3577 if (nr_printable_breakpoints
> 0)
3579 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3580 if (nr_printable_breakpoints
> 0)
3582 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3585 if (nr_printable_breakpoints
> 0)
3587 if (TARGET_ADDR_BIT
<= 32)
3588 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3590 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3592 if (nr_printable_breakpoints
> 0)
3594 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3595 ui_out_table_body (uiout
);
3596 if (nr_printable_breakpoints
> 0)
3597 annotate_breakpoints_table ();
3601 || bnum
== b
->number
)
3603 /* We only print out user settable breakpoints unless the
3605 if (allflag
|| user_settable_breakpoint (b
))
3606 print_one_breakpoint (b
, &last_addr
);
3609 do_cleanups (bkpttbl_chain
);
3611 if (nr_printable_breakpoints
== 0)
3614 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3616 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3621 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3622 that a comparison of an unsigned with -1 is always false. */
3623 if (last_addr
!= (CORE_ADDR
) -1)
3624 set_next_address (last_addr
);
3627 /* FIXME? Should this be moved up so that it is only called when
3628 there have been breakpoints? */
3629 annotate_breakpoints_table_end ();
3634 breakpoints_info (char *bnum_exp
, int from_tty
)
3639 bnum
= parse_and_eval_long (bnum_exp
);
3641 breakpoint_1 (bnum
, 0);
3646 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3651 bnum
= parse_and_eval_long (bnum_exp
);
3653 breakpoint_1 (bnum
, 1);
3656 /* Print a message describing any breakpoints set at PC. */
3659 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3661 register int others
= 0;
3662 register struct breakpoint
*b
;
3665 if (b
->address
== pc
) /* address match / overlay match */
3666 if (!overlay_debugging
|| b
->section
== section
)
3670 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3672 if (b
->address
== pc
) /* address match / overlay match */
3673 if (!overlay_debugging
|| b
->section
== section
)
3676 printf_filtered ("%d%s%s ",
3678 ((b
->enable_state
== bp_disabled
||
3679 b
->enable_state
== bp_shlib_disabled
||
3680 b
->enable_state
== bp_call_disabled
)
3682 : b
->enable_state
== bp_permanent
3686 : ((others
== 1) ? " and" : ""));
3688 printf_filtered ("also set at pc ");
3689 print_address_numeric (pc
, 1, gdb_stdout
);
3690 printf_filtered (".\n");
3694 /* Set the default place to put a breakpoint
3695 for the `break' command with no arguments. */
3698 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3701 default_breakpoint_valid
= valid
;
3702 default_breakpoint_address
= addr
;
3703 default_breakpoint_symtab
= symtab
;
3704 default_breakpoint_line
= line
;
3707 /* Return true iff it is meaningful to use the address member of
3708 BPT. For some breakpoint types, the address member is irrelevant
3709 and it makes no sense to attempt to compare it to other addresses
3710 (or use it for any other purpose either).
3712 More specifically, each of the following breakpoint types will always
3713 have a zero valued address and we don't want check_duplicates() to mark
3714 breakpoints of any of these types to be a duplicate of an actual
3715 breakpoint at address zero:
3718 bp_hardware_watchpoint
3720 bp_access_watchpoint
3727 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3729 enum bptype type
= bpt
->type
;
3731 return (type
!= bp_watchpoint
3732 && type
!= bp_hardware_watchpoint
3733 && type
!= bp_read_watchpoint
3734 && type
!= bp_access_watchpoint
3735 && type
!= bp_catch_exec
3736 && type
!= bp_longjmp_resume
3737 && type
!= bp_catch_fork
3738 && type
!= bp_catch_vfork
);
3741 /* Rescan breakpoints at the same address and section as BPT,
3742 marking the first one as "first" and any others as "duplicates".
3743 This is so that the bpt instruction is only inserted once.
3744 If we have a permanent breakpoint at the same place as BPT, make
3745 that one the official one, and the rest as duplicates. */
3748 check_duplicates (struct breakpoint
*bpt
)
3750 register struct breakpoint
*b
;
3751 register int count
= 0;
3752 struct breakpoint
*perm_bp
= 0;
3753 CORE_ADDR address
= bpt
->address
;
3754 asection
*section
= bpt
->section
;
3756 if (! breakpoint_address_is_meaningful (bpt
))
3760 if (b
->enable_state
!= bp_disabled
3761 && b
->enable_state
!= bp_shlib_disabled
3762 && b
->enable_state
!= bp_call_disabled
3763 && b
->address
== address
/* address / overlay match */
3764 && (!overlay_debugging
|| b
->section
== section
)
3765 && breakpoint_address_is_meaningful (b
))
3767 /* Have we found a permanent breakpoint? */
3768 if (b
->enable_state
== bp_permanent
)
3775 b
->duplicate
= count
> 1;
3778 /* If we found a permanent breakpoint at this address, go over the
3779 list again and declare all the other breakpoints there to be the
3783 perm_bp
->duplicate
= 0;
3785 /* Permanent breakpoint should always be inserted. */
3786 if (! perm_bp
->inserted
)
3787 internal_error (__FILE__
, __LINE__
,
3788 "allegedly permanent breakpoint is not "
3789 "actually inserted");
3795 internal_error (__FILE__
, __LINE__
,
3796 "another breakpoint was inserted on top of "
3797 "a permanent breakpoint");
3799 if (b
->enable_state
!= bp_disabled
3800 && b
->enable_state
!= bp_shlib_disabled
3801 && b
->enable_state
!= bp_call_disabled
3802 && b
->address
== address
/* address / overlay match */
3803 && (!overlay_debugging
|| b
->section
== section
)
3804 && breakpoint_address_is_meaningful (b
))
3810 /* set_raw_breakpoint() is a low level routine for allocating and
3811 partially initializing a breakpoint of type BPTYPE. The newly
3812 created breakpoint's address, section, source file name, and line
3813 number are provided by SAL. The newly created and partially
3814 initialized breakpoint is added to the breakpoint chain and
3815 is also returned as the value of this function.
3817 It is expected that the caller will complete the initialization of
3818 the newly created breakpoint struct as well as output any status
3819 information regarding the creation of a new breakpoint. In
3820 particular, set_raw_breakpoint() does NOT set the breakpoint
3821 number! Care should be taken to not allow an error() to occur
3822 prior to completing the initialization of the breakpoint. If this
3823 should happen, a bogus breakpoint will be left on the chain. */
3826 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
3828 register struct breakpoint
*b
, *b1
;
3830 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
3831 memset (b
, 0, sizeof (*b
));
3832 b
->address
= sal
.pc
;
3833 if (sal
.symtab
== NULL
)
3834 b
->source_file
= NULL
;
3836 b
->source_file
= savestring (sal
.symtab
->filename
,
3837 strlen (sal
.symtab
->filename
));
3838 b
->section
= sal
.section
;
3840 b
->language
= current_language
->la_language
;
3841 b
->input_radix
= input_radix
;
3843 b
->line_number
= sal
.line
;
3844 b
->enable_state
= bp_enabled
;
3847 b
->ignore_count
= 0;
3849 b
->frame_id
= null_frame_id
;
3850 b
->dll_pathname
= NULL
;
3851 b
->triggered_dll_pathname
= NULL
;
3852 b
->forked_inferior_pid
= 0;
3853 b
->exec_pathname
= NULL
;
3855 /* Add this breakpoint to the end of the chain
3856 so that a list of breakpoints will come out in order
3857 of increasing numbers. */
3859 b1
= breakpoint_chain
;
3861 breakpoint_chain
= b
;
3869 check_duplicates (b
);
3870 breakpoints_changed ();
3876 /* Note that the breakpoint object B describes a permanent breakpoint
3877 instruction, hard-wired into the inferior's code. */
3879 make_breakpoint_permanent (struct breakpoint
*b
)
3881 b
->enable_state
= bp_permanent
;
3883 /* By definition, permanent breakpoints are already present in the code. */
3887 static struct breakpoint
*
3888 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
3890 static int internal_breakpoint_number
= -1;
3891 struct symtab_and_line sal
;
3892 struct breakpoint
*b
;
3894 init_sal (&sal
); /* initialize to zeroes */
3897 sal
.section
= find_pc_overlay (sal
.pc
);
3899 b
= set_raw_breakpoint (sal
, type
);
3900 b
->number
= internal_breakpoint_number
--;
3901 b
->disposition
= disp_donttouch
;
3908 create_longjmp_breakpoint (char *func_name
)
3910 struct breakpoint
*b
;
3911 struct minimal_symbol
*m
;
3913 if (func_name
== NULL
)
3914 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
3917 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
, NULL
)) == NULL
)
3920 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
3923 b
->enable_state
= bp_disabled
;
3926 b
->addr_string
= xstrdup (func_name
);
3929 /* Call this routine when stepping and nexting to enable a breakpoint
3930 if we do a longjmp(). When we hit that breakpoint, call
3931 set_longjmp_resume_breakpoint() to figure out where we are going. */
3934 enable_longjmp_breakpoint (void)
3936 register struct breakpoint
*b
;
3939 if (b
->type
== bp_longjmp
)
3941 b
->enable_state
= bp_enabled
;
3942 check_duplicates (b
);
3947 disable_longjmp_breakpoint (void)
3949 register struct breakpoint
*b
;
3952 if (b
->type
== bp_longjmp
3953 || b
->type
== bp_longjmp_resume
)
3955 b
->enable_state
= bp_disabled
;
3956 check_duplicates (b
);
3961 create_overlay_event_breakpoint (char *func_name
)
3963 struct breakpoint
*b
;
3964 struct minimal_symbol
*m
;
3966 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
, NULL
)) == NULL
)
3969 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
3971 b
->addr_string
= xstrdup (func_name
);
3973 if (overlay_debugging
== ovly_auto
)
3975 b
->enable_state
= bp_enabled
;
3976 overlay_events_enabled
= 1;
3980 b
->enable_state
= bp_disabled
;
3981 overlay_events_enabled
= 0;
3986 enable_overlay_breakpoints (void)
3988 register struct breakpoint
*b
;
3991 if (b
->type
== bp_overlay_event
)
3993 b
->enable_state
= bp_enabled
;
3994 check_duplicates (b
);
3995 overlay_events_enabled
= 1;
4000 disable_overlay_breakpoints (void)
4002 register struct breakpoint
*b
;
4005 if (b
->type
== bp_overlay_event
)
4007 b
->enable_state
= bp_disabled
;
4008 check_duplicates (b
);
4009 overlay_events_enabled
= 0;
4014 create_thread_event_breakpoint (CORE_ADDR address
)
4016 struct breakpoint
*b
;
4018 b
= create_internal_breakpoint (address
, bp_thread_event
);
4020 b
->enable_state
= bp_enabled
;
4021 /* addr_string has to be used or breakpoint_re_set will delete me. */
4022 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->address
));
4028 remove_thread_event_breakpoints (void)
4030 struct breakpoint
*b
, *temp
;
4032 ALL_BREAKPOINTS_SAFE (b
, temp
)
4033 if (b
->type
== bp_thread_event
)
4034 delete_breakpoint (b
);
4039 remove_solib_event_breakpoints (void)
4041 register struct breakpoint
*b
, *temp
;
4043 ALL_BREAKPOINTS_SAFE (b
, temp
)
4044 if (b
->type
== bp_shlib_event
)
4045 delete_breakpoint (b
);
4049 create_solib_event_breakpoint (CORE_ADDR address
)
4051 struct breakpoint
*b
;
4053 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4057 /* Disable any breakpoints that are on code in shared libraries. Only
4058 apply to enabled breakpoints, disabled ones can just stay disabled. */
4061 disable_breakpoints_in_shlibs (int silent
)
4063 struct breakpoint
*b
;
4064 int disabled_shlib_breaks
= 0;
4066 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4069 #if defined (PC_SOLIB)
4070 if (((b
->type
== bp_breakpoint
) ||
4071 (b
->type
== bp_hardware_breakpoint
)) &&
4072 b
->enable_state
== bp_enabled
&&
4074 PC_SOLIB (b
->address
))
4076 b
->enable_state
= bp_shlib_disabled
;
4079 if (!disabled_shlib_breaks
)
4081 target_terminal_ours_for_output ();
4082 warning ("Temporarily disabling shared library breakpoints:");
4084 disabled_shlib_breaks
= 1;
4085 warning ("breakpoint #%d ", b
->number
);
4092 /* Try to reenable any breakpoints in shared libraries. */
4094 re_enable_breakpoints_in_shlibs (void)
4096 struct breakpoint
*b
;
4099 if (b
->enable_state
== bp_shlib_disabled
)
4103 /* Do not reenable the breakpoint if the shared library
4104 is still not mapped in. */
4105 if (target_read_memory (b
->address
, buf
, 1) == 0)
4106 b
->enable_state
= bp_enabled
;
4113 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4114 char *cond_string
, enum bptype bp_kind
)
4116 struct breakpoint
*b
;
4117 struct symtabs_and_lines sals
;
4118 struct cleanup
*old_chain
;
4119 struct cleanup
*canonical_strings_chain
= NULL
;
4120 char *addr_start
= hookname
;
4121 char *addr_end
= NULL
;
4122 char **canonical
= (char **) NULL
;
4123 int thread
= -1; /* All threads. */
4125 /* Set a breakpoint on the specified hook. */
4126 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
, 0, &canonical
);
4127 addr_end
= hookname
;
4129 if (sals
.nelts
== 0)
4131 warning ("Unable to set a breakpoint on dynamic linker callback.");
4132 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4133 warning ("GDB will be unable to track shl_load/shl_unload calls");
4136 if (sals
.nelts
!= 1)
4138 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4139 warning ("GDB will be unable to track shl_load/shl_unload calls");
4143 /* Make sure that all storage allocated in decode_line_1 gets freed
4144 in case the following errors out. */
4145 old_chain
= make_cleanup (xfree
, sals
.sals
);
4146 if (canonical
!= (char **) NULL
)
4148 make_cleanup (xfree
, canonical
);
4149 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4150 if (canonical
[0] != NULL
)
4151 make_cleanup (xfree
, canonical
[0]);
4154 resolve_sal_pc (&sals
.sals
[0]);
4156 /* Remove the canonical strings from the cleanup, they are needed below. */
4157 if (canonical
!= (char **) NULL
)
4158 discard_cleanups (canonical_strings_chain
);
4160 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4161 set_breakpoint_count (breakpoint_count
+ 1);
4162 b
->number
= breakpoint_count
;
4164 b
->cond_string
= (cond_string
== NULL
) ?
4165 NULL
: savestring (cond_string
, strlen (cond_string
));
4168 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4169 b
->addr_string
= canonical
[0];
4170 else if (addr_start
)
4171 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4173 b
->enable_state
= bp_enabled
;
4174 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4176 if (dll_pathname
== NULL
)
4177 b
->dll_pathname
= NULL
;
4180 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4181 strcpy (b
->dll_pathname
, dll_pathname
);
4185 do_cleanups (old_chain
);
4189 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4190 char *dll_pathname
, char *cond_string
)
4192 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4193 cond_string
, bp_catch_load
);
4197 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4198 char *dll_pathname
, char *cond_string
)
4200 solib_load_unload_1 (hookname
,tempflag
, dll_pathname
,
4201 cond_string
, bp_catch_unload
);
4205 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4206 enum bptype bp_kind
)
4208 struct symtab_and_line sal
;
4209 struct breakpoint
*b
;
4210 int thread
= -1; /* All threads. */
4217 b
= set_raw_breakpoint (sal
, bp_kind
);
4218 set_breakpoint_count (breakpoint_count
+ 1);
4219 b
->number
= breakpoint_count
;
4221 b
->cond_string
= (cond_string
== NULL
) ?
4222 NULL
: savestring (cond_string
, strlen (cond_string
));
4224 b
->addr_string
= NULL
;
4225 b
->enable_state
= bp_enabled
;
4226 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4227 b
->forked_inferior_pid
= 0;
4233 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4235 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4239 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4241 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4245 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4247 struct symtab_and_line sal
;
4248 struct breakpoint
*b
;
4249 int thread
= -1; /* All threads. */
4256 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4257 set_breakpoint_count (breakpoint_count
+ 1);
4258 b
->number
= breakpoint_count
;
4260 b
->cond_string
= (cond_string
== NULL
) ?
4261 NULL
: savestring (cond_string
, strlen (cond_string
));
4263 b
->addr_string
= NULL
;
4264 b
->enable_state
= bp_enabled
;
4265 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4271 hw_breakpoint_used_count (void)
4273 register struct breakpoint
*b
;
4278 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4286 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4288 register struct breakpoint
*b
;
4291 *other_type_used
= 0;
4294 if (b
->enable_state
== bp_enabled
)
4296 if (b
->type
== type
)
4298 else if ((b
->type
== bp_hardware_watchpoint
||
4299 b
->type
== bp_read_watchpoint
||
4300 b
->type
== bp_access_watchpoint
)
4301 && b
->enable_state
== bp_enabled
)
4302 *other_type_used
= 1;
4308 /* Call this after hitting the longjmp() breakpoint. Use this to set
4309 a new breakpoint at the target of the jmp_buf.
4311 FIXME - This ought to be done by setting a temporary breakpoint
4312 that gets deleted automatically... */
4315 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4317 register struct breakpoint
*b
;
4320 if (b
->type
== bp_longjmp_resume
)
4323 b
->enable_state
= bp_enabled
;
4324 b
->frame_id
= frame_id
;
4325 check_duplicates (b
);
4331 disable_watchpoints_before_interactive_call_start (void)
4333 struct breakpoint
*b
;
4337 if (((b
->type
== bp_watchpoint
)
4338 || (b
->type
== bp_hardware_watchpoint
)
4339 || (b
->type
== bp_read_watchpoint
)
4340 || (b
->type
== bp_access_watchpoint
)
4341 || ep_is_exception_catchpoint (b
))
4342 && (b
->enable_state
== bp_enabled
))
4344 b
->enable_state
= bp_call_disabled
;
4345 check_duplicates (b
);
4351 enable_watchpoints_after_interactive_call_stop (void)
4353 struct breakpoint
*b
;
4357 if (((b
->type
== bp_watchpoint
)
4358 || (b
->type
== bp_hardware_watchpoint
)
4359 || (b
->type
== bp_read_watchpoint
)
4360 || (b
->type
== bp_access_watchpoint
)
4361 || ep_is_exception_catchpoint (b
))
4362 && (b
->enable_state
== bp_call_disabled
))
4364 b
->enable_state
= bp_enabled
;
4365 check_duplicates (b
);
4371 /* Set a breakpoint that will evaporate an end of command
4372 at address specified by SAL.
4373 Restrict it to frame FRAME if FRAME is nonzero. */
4376 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4379 register struct breakpoint
*b
;
4380 b
= set_raw_breakpoint (sal
, type
);
4381 b
->enable_state
= bp_enabled
;
4382 b
->disposition
= disp_donttouch
;
4383 b
->frame_id
= frame_id
;
4385 /* If we're debugging a multi-threaded program, then we
4386 want momentary breakpoints to be active in only a
4387 single thread of control. */
4388 if (in_thread_list (inferior_ptid
))
4389 b
->thread
= pid_to_thread_id (inferior_ptid
);
4395 /* Tell the user we have just set a breakpoint B. */
4398 mention (struct breakpoint
*b
)
4401 struct cleanup
*old_chain
, *ui_out_chain
;
4402 struct ui_stream
*stb
;
4404 stb
= ui_out_stream_new (uiout
);
4405 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4407 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4408 watchpoint) other than breakpoint creation. It should be possible to
4409 clean this up and at the same time replace the random calls to
4410 breakpoint_changed with this hook, as has already been done for
4411 delete_breakpoint_hook and so on. */
4412 if (create_breakpoint_hook
)
4413 create_breakpoint_hook (b
);
4414 breakpoint_create_event (b
->number
);
4419 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4422 ui_out_text (uiout
, "Watchpoint ");
4423 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4424 ui_out_field_int (uiout
, "number", b
->number
);
4425 ui_out_text (uiout
, ": ");
4426 print_expression (b
->exp
, stb
->stream
);
4427 ui_out_field_stream (uiout
, "exp", stb
);
4428 do_cleanups (ui_out_chain
);
4430 case bp_hardware_watchpoint
:
4431 ui_out_text (uiout
, "Hardware watchpoint ");
4432 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4433 ui_out_field_int (uiout
, "number", b
->number
);
4434 ui_out_text (uiout
, ": ");
4435 print_expression (b
->exp
, stb
->stream
);
4436 ui_out_field_stream (uiout
, "exp", stb
);
4437 do_cleanups (ui_out_chain
);
4439 case bp_read_watchpoint
:
4440 ui_out_text (uiout
, "Hardware read watchpoint ");
4441 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4442 ui_out_field_int (uiout
, "number", b
->number
);
4443 ui_out_text (uiout
, ": ");
4444 print_expression (b
->exp
, stb
->stream
);
4445 ui_out_field_stream (uiout
, "exp", stb
);
4446 do_cleanups (ui_out_chain
);
4448 case bp_access_watchpoint
:
4449 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4450 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4451 ui_out_field_int (uiout
, "number", b
->number
);
4452 ui_out_text (uiout
, ": ");
4453 print_expression (b
->exp
, stb
->stream
);
4454 ui_out_field_stream (uiout
, "exp", stb
);
4455 do_cleanups (ui_out_chain
);
4458 if (ui_out_is_mi_like_p (uiout
))
4463 printf_filtered ("Breakpoint %d", b
->number
);
4466 case bp_hardware_breakpoint
:
4467 if (ui_out_is_mi_like_p (uiout
))
4472 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4476 case bp_catch_unload
:
4477 printf_filtered ("Catchpoint %d (%s %s)",
4479 (b
->type
== bp_catch_load
) ? "load" : "unload",
4480 (b
->dll_pathname
!= NULL
) ?
4481 b
->dll_pathname
: "<any library>");
4484 case bp_catch_vfork
:
4485 printf_filtered ("Catchpoint %d (%s)",
4487 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4490 printf_filtered ("Catchpoint %d (exec)",
4493 case bp_catch_catch
:
4494 case bp_catch_throw
:
4495 printf_filtered ("Catchpoint %d (%s)",
4497 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4503 case bp_longjmp_resume
:
4504 case bp_step_resume
:
4505 case bp_through_sigtramp
:
4507 case bp_watchpoint_scope
:
4508 case bp_shlib_event
:
4509 case bp_thread_event
:
4510 case bp_overlay_event
:
4515 if (addressprint
|| b
->source_file
== NULL
)
4517 printf_filtered (" at ");
4518 print_address_numeric (b
->address
, 1, gdb_stdout
);
4521 printf_filtered (": file %s, line %d.",
4522 b
->source_file
, b
->line_number
);
4524 do_cleanups (old_chain
);
4525 if (ui_out_is_mi_like_p (uiout
))
4527 printf_filtered ("\n");
4531 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4532 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4533 COND[i] and COND_STRING[i] values.
4535 NOTE: If the function succeeds, the caller is expected to cleanup
4536 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4537 array contents). If the function fails (error() is called), the
4538 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4539 COND and SALS arrays and each of those arrays contents. */
4542 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4543 struct expression
**cond
, char **cond_string
,
4544 enum bptype type
, enum bpdisp disposition
,
4545 int thread
, int ignore_count
, int from_tty
)
4547 if (type
== bp_hardware_breakpoint
)
4549 int i
= hw_breakpoint_used_count ();
4550 int target_resources_ok
=
4551 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4553 if (target_resources_ok
== 0)
4554 error ("No hardware breakpoint support in the target.");
4555 else if (target_resources_ok
< 0)
4556 error ("Hardware breakpoints used exceeds limit.");
4559 /* Now set all the breakpoints. */
4562 for (i
= 0; i
< sals
.nelts
; i
++)
4564 struct breakpoint
*b
;
4565 struct symtab_and_line sal
= sals
.sals
[i
];
4568 describe_other_breakpoints (sal
.pc
, sal
.section
);
4570 b
= set_raw_breakpoint (sal
, type
);
4571 set_breakpoint_count (breakpoint_count
+ 1);
4572 b
->number
= breakpoint_count
;
4576 b
->addr_string
= addr_string
[i
];
4578 /* addr_string has to be used or breakpoint_re_set will delete
4580 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->address
));
4581 b
->cond_string
= cond_string
[i
];
4582 b
->ignore_count
= ignore_count
;
4583 b
->enable_state
= bp_enabled
;
4584 b
->disposition
= disposition
;
4590 /* Parse ARG which is assumed to be a SAL specification possibly
4591 followed by conditionals. On return, SALS contains an array of SAL
4592 addresses found. ADDR_STRING contains a vector of (canonical)
4593 address strings. ARG points to the end of the SAL. */
4596 parse_breakpoint_sals (char **address
,
4597 struct symtabs_and_lines
*sals
,
4598 char ***addr_string
)
4600 char *addr_start
= *address
;
4601 *addr_string
= NULL
;
4602 /* If no arg given, or if first arg is 'if ', use the default
4604 if ((*address
) == NULL
4605 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4607 if (default_breakpoint_valid
)
4609 struct symtab_and_line sal
;
4610 init_sal (&sal
); /* initialize to zeroes */
4611 sals
->sals
= (struct symtab_and_line
*)
4612 xmalloc (sizeof (struct symtab_and_line
));
4613 sal
.pc
= default_breakpoint_address
;
4614 sal
.line
= default_breakpoint_line
;
4615 sal
.symtab
= default_breakpoint_symtab
;
4616 sal
.section
= find_pc_overlay (sal
.pc
);
4617 sals
->sals
[0] = sal
;
4621 error ("No default breakpoint address now.");
4625 /* Force almost all breakpoints to be in terms of the
4626 current_source_symtab (which is decode_line_1's default). This
4627 should produce the results we want almost all of the time while
4628 leaving default_breakpoint_* alone.
4629 ObjC: However, don't match an Objective-C method name which
4630 may have a '+' or '-' succeeded by a '[' */
4632 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
4634 if (default_breakpoint_valid
4636 || ((strchr ("+-", (*address
)[0]) != NULL
)
4637 && ((*address
)[1] != '['))))
4638 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
4639 default_breakpoint_line
, addr_string
);
4641 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0, addr_string
);
4643 /* For any SAL that didn't have a canonical string, fill one in. */
4644 if (sals
->nelts
> 0 && *addr_string
== NULL
)
4645 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
4646 if (addr_start
!= (*address
))
4649 for (i
= 0; i
< sals
->nelts
; i
++)
4651 /* Add the string if not present. */
4652 if ((*addr_string
)[i
] == NULL
)
4653 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
4659 /* Convert each SAL into a real PC. Verify that the PC can be
4660 inserted as a breakpoint. If it can't throw an error. */
4663 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
4667 for (i
= 0; i
< sals
->nelts
; i
++)
4669 resolve_sal_pc (&sals
->sals
[i
]);
4671 /* It's possible for the PC to be nonzero, but still an illegal
4672 value on some targets.
4674 For example, on HP-UX if you start gdb, and before running the
4675 inferior you try to set a breakpoint on a shared library function
4676 "foo" where the inferior doesn't call "foo" directly but does
4677 pass its address to another function call, then we do find a
4678 minimal symbol for the "foo", but it's address is invalid.
4679 (Appears to be an index into a table that the loader sets up
4680 when the inferior is run.)
4682 Give the target a chance to bless sals.sals[i].pc before we
4683 try to make a breakpoint for it. */
4684 if (PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
4686 if (address
== NULL
)
4687 error ("Cannot break without a running program.");
4689 error ("Cannot break on %s without a running program.",
4695 /* Set a breakpoint according to ARG (function, linenum or *address)
4696 flag: first bit : 0 non-temporary, 1 temporary.
4697 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4700 break_command_1 (char *arg
, int flag
, int from_tty
)
4702 int tempflag
, hardwareflag
;
4703 struct symtabs_and_lines sals
;
4704 register struct expression
**cond
= 0;
4705 /* Pointers in arg to the start, and one past the end, of the
4707 char **cond_string
= (char **) NULL
;
4708 char *addr_start
= arg
;
4710 struct cleanup
*old_chain
;
4711 struct cleanup
*breakpoint_chain
= NULL
;
4714 int ignore_count
= 0;
4716 hardwareflag
= flag
& BP_HARDWAREFLAG
;
4717 tempflag
= flag
& BP_TEMPFLAG
;
4722 parse_breakpoint_sals (&arg
, &sals
, &addr_string
);
4727 /* Create a chain of things that always need to be cleaned up. */
4728 old_chain
= make_cleanup (null_cleanup
, 0);
4730 /* Make sure that all storage allocated to SALS gets freed. */
4731 make_cleanup (xfree
, sals
.sals
);
4733 /* Cleanup the addr_string array but not its contents. */
4734 make_cleanup (xfree
, addr_string
);
4736 /* Allocate space for all the cond expressions. */
4737 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4738 make_cleanup (xfree
, cond
);
4740 /* Allocate space for all the cond strings. */
4741 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4742 make_cleanup (xfree
, cond_string
);
4744 /* ----------------------------- SNIP -----------------------------
4745 Anything added to the cleanup chain beyond this point is assumed
4746 to be part of a breakpoint. If the breakpoint create succeeds
4747 then the memory is not reclaimed. */
4748 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4750 /* Mark the contents of the addr_string for cleanup. These go on
4751 the breakpoint_chain and only occure if the breakpoint create
4753 for (i
= 0; i
< sals
.nelts
; i
++)
4755 if (addr_string
[i
] != NULL
)
4756 make_cleanup (xfree
, addr_string
[i
]);
4759 /* Resolve all line numbers to PC's and verify that the addresses
4760 are ok for the target. */
4761 breakpoint_sals_to_pc (&sals
, addr_start
);
4763 /* Verify that condition can be parsed, before setting any
4764 breakpoints. Allocate a separate condition expression for each
4766 thread
= -1; /* No specific thread yet */
4767 for (i
= 0; i
< sals
.nelts
; i
++)
4774 char *cond_start
= NULL
;
4775 char *cond_end
= NULL
;
4776 while (*tok
== ' ' || *tok
== '\t')
4781 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
4784 toklen
= end_tok
- tok
;
4786 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
4788 tok
= cond_start
= end_tok
+ 1;
4789 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4790 make_cleanup (xfree
, cond
[i
]);
4792 cond_string
[i
] = savestring (cond_start
, cond_end
- cond_start
);
4793 make_cleanup (xfree
, cond_string
[i
]);
4795 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
4801 thread
= strtol (tok
, &tok
, 0);
4803 error ("Junk after thread keyword.");
4804 if (!valid_thread_id (thread
))
4805 error ("Unknown thread %d\n", thread
);
4808 error ("Junk at end of arguments.");
4812 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
4813 hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
4814 tempflag
? disp_del
: disp_donttouch
,
4815 thread
, ignore_count
, from_tty
);
4819 warning ("Multiple breakpoints were set.");
4820 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
4822 /* That's it. Discard the cleanups for data inserted into the
4824 discard_cleanups (breakpoint_chain
);
4825 /* But cleanup everything else. */
4826 do_cleanups (old_chain
);
4829 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
4830 linenum or *address) with COND and IGNORE_COUNT. */
4832 struct captured_breakpoint_args
4843 do_captured_breakpoint (void *data
)
4845 struct captured_breakpoint_args
*args
= data
;
4846 struct symtabs_and_lines sals
;
4847 register struct expression
**cond
;
4848 struct cleanup
*old_chain
;
4849 struct cleanup
*breakpoint_chain
= NULL
;
4856 /* Parse the source and lines spec. Delay check that the expression
4857 didn't contain trailing garbage until after cleanups are in
4861 address_end
= args
->address
;
4863 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
);
4868 /* Create a chain of things at always need to be cleaned up. */
4869 old_chain
= make_cleanup (null_cleanup
, 0);
4871 /* Always have a addr_string array, even if it is empty. */
4872 make_cleanup (xfree
, addr_string
);
4874 /* Make sure that all storage allocated to SALS gets freed. */
4875 make_cleanup (xfree
, sals
.sals
);
4877 /* Allocate space for all the cond expressions. */
4878 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4879 make_cleanup (xfree
, cond
);
4881 /* Allocate space for all the cond strings. */
4882 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4883 make_cleanup (xfree
, cond_string
);
4885 /* ----------------------------- SNIP -----------------------------
4886 Anything added to the cleanup chain beyond this point is assumed
4887 to be part of a breakpoint. If the breakpoint create goes
4888 through then that memory is not cleaned up. */
4889 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4891 /* Mark the contents of the addr_string for cleanup. These go on
4892 the breakpoint_chain and only occure if the breakpoint create
4894 for (i
= 0; i
< sals
.nelts
; i
++)
4896 if (addr_string
[i
] != NULL
)
4897 make_cleanup (xfree
, addr_string
[i
]);
4900 /* Wait until now before checking for garbage at the end of the
4901 address. That way cleanups can take care of freeing any
4903 if (*address_end
!= '\0')
4904 error ("Garbage %s following breakpoint address", address_end
);
4906 /* Resolve all line numbers to PC's. */
4907 breakpoint_sals_to_pc (&sals
, args
->address
);
4909 /* Verify that conditions can be parsed, before setting any
4911 for (i
= 0; i
< sals
.nelts
; i
++)
4913 if (args
->condition
!= NULL
)
4915 char *tok
= args
->condition
;
4916 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4918 error ("Garbage %s follows condition", tok
);
4919 make_cleanup (xfree
, cond
[i
]);
4920 cond_string
[i
] = xstrdup (args
->condition
);
4924 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
4925 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
4926 args
->tempflag
? disp_del
: disp_donttouch
,
4927 args
->thread
, args
->ignore_count
, 0/*from-tty*/);
4929 /* That's it. Discard the cleanups for data inserted into the
4931 discard_cleanups (breakpoint_chain
);
4932 /* But cleanup everything else. */
4933 do_cleanups (old_chain
);
4938 gdb_breakpoint (char *address
, char *condition
,
4939 int hardwareflag
, int tempflag
,
4940 int thread
, int ignore_count
)
4942 struct captured_breakpoint_args args
;
4943 args
.address
= address
;
4944 args
.condition
= condition
;
4945 args
.hardwareflag
= hardwareflag
;
4946 args
.tempflag
= tempflag
;
4947 args
.thread
= thread
;
4948 args
.ignore_count
= ignore_count
;
4949 return catch_errors (do_captured_breakpoint
, &args
,
4950 NULL
, RETURN_MASK_ALL
);
4955 break_at_finish_at_depth_command_1 (char *arg
, int flag
, int from_tty
)
4957 struct frame_info
*frame
;
4958 CORE_ADDR low
, high
, selected_pc
= 0;
4959 char *extra_args
= NULL
;
4962 int extra_args_len
= 0, if_arg
= 0;
4965 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
4968 if (default_breakpoint_valid
)
4970 if (deprecated_selected_frame
)
4972 selected_pc
= get_frame_pc (deprecated_selected_frame
);
4977 error ("No selected frame.");
4980 error ("No default breakpoint address now.");
4984 extra_args
= strchr (arg
, ' ');
4988 extra_args_len
= strlen (extra_args
);
4989 level_arg
= (char *) xmalloc (extra_args
- arg
);
4990 strncpy (level_arg
, arg
, extra_args
- arg
- 1);
4991 level_arg
[extra_args
- arg
- 1] = '\0';
4995 level_arg
= (char *) xmalloc (strlen (arg
) + 1);
4996 strcpy (level_arg
, arg
);
4999 frame
= parse_frame_specification (level_arg
);
5001 selected_pc
= get_frame_pc (frame
);
5008 extra_args_len
= strlen (arg
);
5013 if (find_pc_partial_function (selected_pc
, (char **) NULL
, &low
, &high
))
5015 addr_string
= (char *) xmalloc (26 + extra_args_len
);
5017 sprintf (addr_string
, "*0x%s %s", paddr_nz (high
), extra_args
);
5019 sprintf (addr_string
, "*0x%s", paddr_nz (high
));
5020 break_command_1 (addr_string
, flag
, from_tty
);
5021 xfree (addr_string
);
5024 error ("No function contains the specified address");
5027 error ("Unable to set breakpoint at procedure exit");
5032 break_at_finish_command_1 (char *arg
, int flag
, int from_tty
)
5034 char *addr_string
, *break_string
, *beg_addr_string
;
5035 CORE_ADDR low
, high
;
5036 struct symtabs_and_lines sals
;
5037 struct symtab_and_line sal
;
5038 struct cleanup
*old_chain
;
5039 char *extra_args
= NULL
;
5040 int extra_args_len
= 0;
5044 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5046 if (default_breakpoint_valid
)
5048 if (deprecated_selected_frame
)
5050 addr_string
= (char *) xmalloc (15);
5051 sprintf (addr_string
, "*0x%s",
5052 paddr_nz (get_frame_pc (deprecated_selected_frame
)));
5057 error ("No selected frame.");
5060 error ("No default breakpoint address now.");
5064 addr_string
= (char *) xmalloc (strlen (arg
) + 1);
5065 strcpy (addr_string
, arg
);
5071 extra_args_len
= strlen (arg
);
5075 /* get the stuff after the function name or address */
5076 extra_args
= strchr (arg
, ' ');
5080 extra_args_len
= strlen (extra_args
);
5087 beg_addr_string
= addr_string
;
5088 sals
= decode_line_1 (&addr_string
, 1, (struct symtab
*) NULL
, 0,
5091 xfree (beg_addr_string
);
5092 old_chain
= make_cleanup (xfree
, sals
.sals
);
5093 for (i
= 0; (i
< sals
.nelts
); i
++)
5096 if (find_pc_partial_function (sal
.pc
, (char **) NULL
, &low
, &high
))
5098 break_string
= (char *) xmalloc (extra_args_len
+ 26);
5100 sprintf (break_string
, "*0x%s %s", paddr_nz (high
), extra_args
);
5102 sprintf (break_string
, "*0x%s", paddr_nz (high
));
5103 break_command_1 (break_string
, flag
, from_tty
);
5104 xfree (break_string
);
5107 error ("No function contains the specified address");
5111 warning ("Multiple breakpoints were set.\n");
5112 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5114 do_cleanups (old_chain
);
5118 /* Helper function for break_command_1 and disassemble_command. */
5121 resolve_sal_pc (struct symtab_and_line
*sal
)
5125 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5127 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5128 error ("No line %d in file \"%s\".",
5129 sal
->line
, sal
->symtab
->filename
);
5133 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5135 struct blockvector
*bv
;
5140 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5143 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5144 sym
= block_function (b
);
5147 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5148 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5152 /* It really is worthwhile to have the section, so we'll just
5153 have to look harder. This case can be executed if we have
5154 line numbers but no functions (as can happen in assembly
5157 struct minimal_symbol
*msym
;
5159 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5161 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5168 break_command (char *arg
, int from_tty
)
5170 break_command_1 (arg
, 0, from_tty
);
5174 break_at_finish_command (char *arg
, int from_tty
)
5176 break_at_finish_command_1 (arg
, 0, from_tty
);
5180 break_at_finish_at_depth_command (char *arg
, int from_tty
)
5182 break_at_finish_at_depth_command_1 (arg
, 0, from_tty
);
5186 tbreak_command (char *arg
, int from_tty
)
5188 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5192 tbreak_at_finish_command (char *arg
, int from_tty
)
5194 break_at_finish_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5198 hbreak_command (char *arg
, int from_tty
)
5200 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5204 thbreak_command (char *arg
, int from_tty
)
5206 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5210 stop_command (char *arg
, int from_tty
)
5212 printf_filtered ("Specify the type of breakpoint to set.\n\
5213 Usage: stop in <function | address>\n\
5218 stopin_command (char *arg
, int from_tty
)
5222 if (arg
== (char *) NULL
)
5224 else if (*arg
!= '*')
5229 /* look for a ':'. If this is a line number specification, then
5230 say it is bad, otherwise, it should be an address or
5231 function/method name */
5232 while (*argptr
&& !hasColon
)
5234 hasColon
= (*argptr
== ':');
5239 badInput
= (*argptr
!= ':'); /* Not a class::method */
5241 badInput
= isdigit (*arg
); /* a simple line number */
5245 printf_filtered ("Usage: stop in <function | address>\n");
5247 break_command_1 (arg
, 0, from_tty
);
5251 stopat_command (char *arg
, int from_tty
)
5255 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5262 /* look for a ':'. If there is a '::' then get out, otherwise
5263 it is probably a line number. */
5264 while (*argptr
&& !hasColon
)
5266 hasColon
= (*argptr
== ':');
5271 badInput
= (*argptr
== ':'); /* we have class::method */
5273 badInput
= !isdigit (*arg
); /* not a line number */
5277 printf_filtered ("Usage: stop at <line>\n");
5279 break_command_1 (arg
, 0, from_tty
);
5283 /* accessflag: hw_write: watch write,
5284 hw_read: watch read,
5285 hw_access: watch access (read or write) */
5287 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5289 struct breakpoint
*b
;
5290 struct symtab_and_line sal
;
5291 struct expression
*exp
;
5292 struct block
*exp_valid_block
;
5293 struct value
*val
, *mark
;
5294 struct frame_info
*frame
;
5295 struct frame_info
*prev_frame
= NULL
;
5296 char *exp_start
= NULL
;
5297 char *exp_end
= NULL
;
5298 char *tok
, *end_tok
;
5300 char *cond_start
= NULL
;
5301 char *cond_end
= NULL
;
5302 struct expression
*cond
= NULL
;
5303 int i
, other_type_used
, target_resources_ok
= 0;
5304 enum bptype bp_type
;
5307 init_sal (&sal
); /* initialize to zeroes */
5309 /* Parse arguments. */
5310 innermost_block
= NULL
;
5312 exp
= parse_exp_1 (&arg
, 0, 0);
5314 exp_valid_block
= innermost_block
;
5315 mark
= value_mark ();
5316 val
= evaluate_expression (exp
);
5317 release_value (val
);
5318 if (VALUE_LAZY (val
))
5319 value_fetch_lazy (val
);
5322 while (*tok
== ' ' || *tok
== '\t')
5326 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5329 toklen
= end_tok
- tok
;
5330 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5332 tok
= cond_start
= end_tok
+ 1;
5333 cond
= parse_exp_1 (&tok
, 0, 0);
5337 error ("Junk at end of command.");
5339 if (accessflag
== hw_read
)
5340 bp_type
= bp_read_watchpoint
;
5341 else if (accessflag
== hw_access
)
5342 bp_type
= bp_access_watchpoint
;
5344 bp_type
= bp_hardware_watchpoint
;
5346 mem_cnt
= can_use_hardware_watchpoint (val
);
5347 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5348 error ("Expression cannot be implemented with read/access watchpoint.");
5351 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5352 target_resources_ok
=
5353 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5355 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5356 error ("Target does not support this type of hardware watchpoint.");
5358 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5359 error ("Target can only support one kind of HW watchpoint at a time.");
5362 #if defined(HPUXHPPA)
5363 /* On HP-UX if you set a h/w
5364 watchpoint before the "run" command, the inferior dies with a e.g.,
5365 SIGILL once you start it. I initially believed this was due to a
5366 bad interaction between page protection traps and the initial
5367 startup sequence by the dynamic linker.
5369 However, I tried avoiding that by having HP-UX's implementation of
5370 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5371 yet, which forced slow watches before a "run" or "attach", and it
5372 still fails somewhere in the startup code.
5374 Until I figure out what's happening, I'm disallowing watches altogether
5375 before the "run" or "attach" command. We'll tell the user they must
5376 set watches after getting the program started. */
5377 if (!target_has_execution
)
5379 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5382 #endif /* HPUXHPPA */
5384 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5385 watchpoint could not be set. */
5386 if (!mem_cnt
|| target_resources_ok
<= 0)
5387 bp_type
= bp_watchpoint
;
5389 /* Now set up the breakpoint. */
5390 b
= set_raw_breakpoint (sal
, bp_type
);
5391 set_breakpoint_count (breakpoint_count
+ 1);
5392 b
->number
= breakpoint_count
;
5393 b
->disposition
= disp_donttouch
;
5395 b
->exp_valid_block
= exp_valid_block
;
5396 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5400 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5404 frame
= block_innermost_frame (exp_valid_block
);
5407 prev_frame
= get_prev_frame (frame
);
5408 b
->watchpoint_frame
= get_frame_id (frame
);
5412 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5415 /* If the expression is "local", then set up a "watchpoint scope"
5416 breakpoint at the point where we've left the scope of the watchpoint
5418 if (innermost_block
)
5422 struct breakpoint
*scope_breakpoint
;
5423 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5424 bp_watchpoint_scope
);
5426 scope_breakpoint
->enable_state
= bp_enabled
;
5428 /* Automatically delete the breakpoint when it hits. */
5429 scope_breakpoint
->disposition
= disp_del
;
5431 /* Only break in the proper frame (help with recursion). */
5432 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5434 /* Set the address at which we will stop. */
5435 scope_breakpoint
->address
= get_frame_pc (prev_frame
);
5437 /* The scope breakpoint is related to the watchpoint. We
5438 will need to act on them together. */
5439 b
->related_breakpoint
= scope_breakpoint
;
5442 value_free_to_mark (mark
);
5446 /* Return count of locations need to be watched and can be handled
5447 in hardware. If the watchpoint can not be handled
5448 in hardware return zero. */
5450 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5451 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5452 ((BYTE_SIZE) <= (REGISTER_SIZE))
5455 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5456 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5457 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5461 can_use_hardware_watchpoint (struct value
*v
)
5463 int found_memory_cnt
= 0;
5464 struct value
*head
= v
;
5466 /* Did the user specifically forbid us to use hardware watchpoints? */
5467 if (!can_use_hw_watchpoints
)
5470 /* Make sure that the value of the expression depends only upon
5471 memory contents, and values computed from them within GDB. If we
5472 find any register references or function calls, we can't use a
5473 hardware watchpoint.
5475 The idea here is that evaluating an expression generates a series
5476 of values, one holding the value of every subexpression. (The
5477 expression a*b+c has five subexpressions: a, b, a*b, c, and
5478 a*b+c.) GDB's values hold almost enough information to establish
5479 the criteria given above --- they identify memory lvalues,
5480 register lvalues, computed values, etcetera. So we can evaluate
5481 the expression, and then scan the chain of values that leaves
5482 behind to decide whether we can detect any possible change to the
5483 expression's final value using only hardware watchpoints.
5485 However, I don't think that the values returned by inferior
5486 function calls are special in any way. So this function may not
5487 notice that an expression involving an inferior function call
5488 can't be watched with hardware watchpoints. FIXME. */
5489 for (; v
; v
= v
->next
)
5491 if (VALUE_LVAL (v
) == lval_memory
)
5494 /* A lazy memory lvalue is one that GDB never needed to fetch;
5495 we either just used its address (e.g., `a' in `a.b') or
5496 we never needed it at all (e.g., `a' in `a,b'). */
5500 /* Ahh, memory we actually used! Check if we can cover
5501 it with hardware watchpoints. */
5502 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
5504 /* We only watch structs and arrays if user asked for it
5505 explicitly, never if they just happen to appear in a
5506 middle of some value chain. */
5508 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5509 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5511 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
5512 int len
= TYPE_LENGTH (VALUE_TYPE (v
));
5514 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5521 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
5522 return 0; /* ??? What does this represent? */
5523 else if (v
->lval
== lval_register
)
5524 return 0; /* cannot watch a register with a HW watchpoint */
5527 /* The expression itself looks suitable for using a hardware
5528 watchpoint, but give the target machine a chance to reject it. */
5529 return found_memory_cnt
;
5533 watch_command_wrapper (char *arg
, int from_tty
)
5535 watch_command (arg
, from_tty
);
5539 watch_command (char *arg
, int from_tty
)
5541 watch_command_1 (arg
, hw_write
, from_tty
);
5545 rwatch_command_wrapper (char *arg
, int from_tty
)
5547 rwatch_command (arg
, from_tty
);
5551 rwatch_command (char *arg
, int from_tty
)
5553 watch_command_1 (arg
, hw_read
, from_tty
);
5557 awatch_command_wrapper (char *arg
, int from_tty
)
5559 awatch_command (arg
, from_tty
);
5563 awatch_command (char *arg
, int from_tty
)
5565 watch_command_1 (arg
, hw_access
, from_tty
);
5569 /* Helper routines for the until_command routine in infcmd.c. Here
5570 because it uses the mechanisms of breakpoints. */
5572 /* This function is called by fetch_inferior_event via the
5573 cmd_continuation pointer, to complete the until command. It takes
5574 care of cleaning up the temporary breakpoints set up by the until
5577 until_break_command_continuation (struct continuation_arg
*arg
)
5579 struct cleanup
*cleanups
;
5581 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5582 do_exec_cleanups (cleanups
);
5587 until_break_command (char *arg
, int from_tty
, int anywhere
)
5589 struct symtabs_and_lines sals
;
5590 struct symtab_and_line sal
;
5591 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
5592 struct breakpoint
*breakpoint
;
5593 struct cleanup
*old_chain
;
5594 struct continuation_arg
*arg1
;
5597 clear_proceed_status ();
5599 /* Set a breakpoint where the user wants it and at return from
5602 if (default_breakpoint_valid
)
5603 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5604 default_breakpoint_line
, (char ***) NULL
);
5606 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5607 0, (char ***) NULL
);
5609 if (sals
.nelts
!= 1)
5610 error ("Couldn't get information on specified line.");
5613 xfree (sals
.sals
); /* malloc'd, so freed */
5616 error ("Junk at end of arguments.");
5618 resolve_sal_pc (&sal
);
5621 /* If the user told us to continue until a specified location,
5622 we don't specify a frame at which we need to stop. */
5623 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
5625 /* Otherwise, specify the current frame, because we want to stop only
5626 at the very same frame. */
5627 breakpoint
= set_momentary_breakpoint (sal
,
5628 get_frame_id (deprecated_selected_frame
),
5631 if (!event_loop_p
|| !target_can_async_p ())
5632 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5634 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5636 /* If we are running asynchronously, and the target supports async
5637 execution, we are not waiting for the target to stop, in the call
5638 tp proceed, below. This means that we cannot delete the
5639 brekpoints until the target has actually stopped. The only place
5640 where we get a chance to do that is in fetch_inferior_event, so
5641 we must set things up for that. */
5643 if (event_loop_p
&& target_can_async_p ())
5645 /* In this case the arg for the continuation is just the point
5646 in the exec_cleanups chain from where to start doing
5647 cleanups, because all the continuation does is the cleanups in
5648 the exec_cleanup_chain. */
5650 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5652 arg1
->data
.pointer
= old_chain
;
5654 add_continuation (until_break_command_continuation
, arg1
);
5657 /* Keep within the current frame, or in frames called by the current
5661 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
5662 sal
.pc
= get_frame_pc (prev_frame
);
5663 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
5665 if (!event_loop_p
|| !target_can_async_p ())
5666 make_cleanup_delete_breakpoint (breakpoint
);
5668 make_exec_cleanup_delete_breakpoint (breakpoint
);
5671 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
5672 /* Do the cleanups now, anly if we are not running asynchronously,
5673 of if we are, but the target is still synchronous. */
5674 if (!event_loop_p
|| !target_can_async_p ())
5675 do_cleanups (old_chain
);
5679 /* These aren't used; I don't konw what they were for. */
5680 /* Set a breakpoint at the catch clause for NAME. */
5682 catch_breakpoint (char *name
)
5687 disable_catch_breakpoint (void)
5692 delete_catch_breakpoint (void)
5697 enable_catch_breakpoint (void)
5704 struct sal_chain
*next
;
5705 struct symtab_and_line sal
;
5709 /* Not really used -- invocation in handle_gnu_4_16_catch_command
5710 had been commented out in the v.4.16 sources, and stays
5711 disabled there now because "catch NAME" syntax isn't allowed.
5713 /* This isn't used; I don't know what it was for. */
5714 /* For each catch clause identified in ARGS, run FUNCTION
5715 with that clause as an argument. */
5716 static struct symtabs_and_lines
5717 map_catch_names (char *args
, int (*function
) ())
5719 register char *p
= args
;
5721 struct symtabs_and_lines sals
;
5723 struct sal_chain
*sal_chain
= 0;
5727 error_no_arg ("one or more catch names");
5735 /* Don't swallow conditional part. */
5736 if (p1
[0] == 'i' && p1
[1] == 'f'
5737 && (p1
[2] == ' ' || p1
[2] == '\t'))
5743 while (isalnum (*p1
) || *p1
== '_' || *p1
== '$')
5747 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
5748 error ("Arguments must be catch names.");
5754 struct sal_chain
*next
= (struct sal_chain
*)
5755 alloca (sizeof (struct sal_chain
));
5756 next
->next
= sal_chain
;
5757 next
->sal
= get_catch_sal (p
);
5762 printf_unfiltered ("No catch clause for exception %s.\n", p
);
5767 while (*p
== ' ' || *p
== '\t')
5773 /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
5775 static struct symtabs_and_lines
5776 get_catch_sals (int this_level_only
)
5778 register struct blockvector
*bl
;
5779 register struct block
*block
;
5780 int index
, have_default
= 0;
5782 struct symtabs_and_lines sals
;
5783 struct sal_chain
*sal_chain
= 0;
5784 char *blocks_searched
;
5786 /* Not sure whether an error message is always the correct response,
5787 but it's better than a core dump. */
5788 if (deprecated_selected_frame
== NULL
)
5789 error ("No selected frame.");
5790 block
= get_frame_block (deprecated_selected_frame
, 0);
5791 pc
= get_frame_pc (deprecated_selected_frame
);
5797 error ("No symbol table info available.\n");
5799 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
5800 blocks_searched
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
5801 memset (blocks_searched
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
5805 CORE_ADDR end
= BLOCK_END (block
) - 4;
5808 if (bl
!= blockvector_for_pc (end
, &index
))
5809 error ("blockvector blotch");
5810 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
5811 error ("blockvector botch");
5812 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
5815 /* Don't print out blocks that have gone by. */
5816 while (index
< last_index
5817 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
5820 while (index
< last_index
5821 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
5823 if (blocks_searched
[index
] == 0)
5825 struct block
*b
= BLOCKVECTOR_BLOCK (bl
, index
);
5827 register struct symbol
*sym
;
5829 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
5831 if (STREQ (SYMBOL_NAME (sym
), "default"))
5837 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
5839 struct sal_chain
*next
= (struct sal_chain
*)
5840 alloca (sizeof (struct sal_chain
));
5841 next
->next
= sal_chain
;
5842 next
->sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
),
5847 blocks_searched
[index
] = 1;
5853 if (sal_chain
&& this_level_only
)
5856 /* After handling the function's top-level block, stop.
5857 Don't continue to its superblock, the block of
5858 per-file symbols. */
5859 if (BLOCK_FUNCTION (block
))
5861 block
= BLOCK_SUPERBLOCK (block
);
5866 struct sal_chain
*tmp_chain
;
5868 /* Count the number of entries. */
5869 for (index
= 0, tmp_chain
= sal_chain
; tmp_chain
;
5870 tmp_chain
= tmp_chain
->next
)
5874 sals
.sals
= (struct symtab_and_line
*)
5875 xmalloc (index
* sizeof (struct symtab_and_line
));
5876 for (index
= 0; sal_chain
; sal_chain
= sal_chain
->next
, index
++)
5877 sals
.sals
[index
] = sal_chain
->sal
;
5884 ep_skip_leading_whitespace (char **s
)
5886 if ((s
== NULL
) || (*s
== NULL
))
5888 while (isspace (**s
))
5892 /* This function examines a string, and attempts to find a token
5893 that might be an event name in the leading characters. If a
5894 possible match is found, a pointer to the last character of
5895 the token is returned. Else, NULL is returned. */
5898 ep_find_event_name_end (char *arg
)
5901 char *event_name_end
= NULL
;
5903 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5907 /* We break out of the loop when we find a token delimiter.
5908 Basically, we're looking for alphanumerics and underscores;
5909 anything else delimites the token. */
5912 if (!isalnum (*s
) && (*s
!= '_'))
5918 return event_name_end
;
5922 /* This function attempts to parse an optional "if <cond>" clause
5923 from the arg string. If one is not found, it returns NULL.
5925 Else, it returns a pointer to the condition string. (It does not
5926 attempt to evaluate the string against a particular block.) And,
5927 it updates arg to point to the first character following the parsed
5928 if clause in the arg string. */
5931 ep_parse_optional_if_clause (char **arg
)
5935 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
5938 /* Skip the "if" keyword. */
5941 /* Skip any extra leading whitespace, and record the start of the
5942 condition string. */
5943 ep_skip_leading_whitespace (arg
);
5946 /* Assume that the condition occupies the remainder of the arg string. */
5947 (*arg
) += strlen (cond_string
);
5952 /* This function attempts to parse an optional filename from the arg
5953 string. If one is not found, it returns NULL.
5955 Else, it returns a pointer to the parsed filename. (This function
5956 makes no attempt to verify that a file of that name exists, or is
5957 accessible.) And, it updates arg to point to the first character
5958 following the parsed filename in the arg string.
5960 Note that clients needing to preserve the returned filename for
5961 future access should copy it to their own buffers. */
5963 ep_parse_optional_filename (char **arg
)
5965 static char filename
[1024];
5970 if ((*arg_p
== '\0') || isspace (*arg_p
))
5988 /* Commands to deal with catching events, such as signals, exceptions,
5989 process start/exit, etc. */
5993 catch_fork
, catch_vfork
5997 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
5998 static void catch_fork_command_1 (catch_fork_kind fork_kind
,
5999 char *arg
, int tempflag
, int from_tty
);
6002 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6005 char *cond_string
= NULL
;
6007 ep_skip_leading_whitespace (&arg
);
6009 /* The allowed syntax is:
6011 catch [v]fork if <cond>
6013 First, check if there's an if clause. */
6014 cond_string
= ep_parse_optional_if_clause (&arg
);
6016 if ((*arg
!= '\0') && !isspace (*arg
))
6017 error ("Junk at end of arguments.");
6019 /* If this target supports it, create a fork or vfork catchpoint
6020 and enable reporting of such events. */
6024 create_fork_event_catchpoint (tempflag
, cond_string
);
6027 create_vfork_event_catchpoint (tempflag
, cond_string
);
6030 error ("unsupported or unknown fork kind; cannot catch it");
6036 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6038 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6040 char *cond_string
= NULL
;
6042 ep_skip_leading_whitespace (&arg
);
6044 /* The allowed syntax is:
6046 catch exec if <cond>
6048 First, check if there's an if clause. */
6049 cond_string
= ep_parse_optional_if_clause (&arg
);
6051 if ((*arg
!= '\0') && !isspace (*arg
))
6052 error ("Junk at end of arguments.");
6054 /* If this target supports it, create an exec catchpoint
6055 and enable reporting of such events. */
6056 create_exec_event_catchpoint (tempflag
, cond_string
);
6060 #if defined(SOLIB_ADD)
6062 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6064 char *dll_pathname
= NULL
;
6065 char *cond_string
= NULL
;
6067 ep_skip_leading_whitespace (&arg
);
6069 /* The allowed syntax is:
6071 catch load if <cond>
6072 catch load <filename>
6073 catch load <filename> if <cond>
6075 The user is not allowed to specify the <filename> after an
6078 We'll ignore the pathological case of a file named "if".
6080 First, check if there's an if clause. If so, then there
6081 cannot be a filename. */
6082 cond_string
= ep_parse_optional_if_clause (&arg
);
6084 /* If there was an if clause, then there cannot be a filename.
6085 Else, there might be a filename and an if clause. */
6086 if (cond_string
== NULL
)
6088 dll_pathname
= ep_parse_optional_filename (&arg
);
6089 ep_skip_leading_whitespace (&arg
);
6090 cond_string
= ep_parse_optional_if_clause (&arg
);
6093 if ((*arg
!= '\0') && !isspace (*arg
))
6094 error ("Junk at end of arguments.");
6096 /* Create a load breakpoint that only triggers when a load of
6097 the specified dll (or any dll, if no pathname was specified)
6099 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6100 dll_pathname
, cond_string
);
6104 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6106 char *dll_pathname
= NULL
;
6107 char *cond_string
= NULL
;
6109 ep_skip_leading_whitespace (&arg
);
6111 /* The allowed syntax is:
6113 catch unload if <cond>
6114 catch unload <filename>
6115 catch unload <filename> if <cond>
6117 The user is not allowed to specify the <filename> after an
6120 We'll ignore the pathological case of a file named "if".
6122 First, check if there's an if clause. If so, then there
6123 cannot be a filename. */
6124 cond_string
= ep_parse_optional_if_clause (&arg
);
6126 /* If there was an if clause, then there cannot be a filename.
6127 Else, there might be a filename and an if clause. */
6128 if (cond_string
== NULL
)
6130 dll_pathname
= ep_parse_optional_filename (&arg
);
6131 ep_skip_leading_whitespace (&arg
);
6132 cond_string
= ep_parse_optional_if_clause (&arg
);
6135 if ((*arg
!= '\0') && !isspace (*arg
))
6136 error ("Junk at end of arguments.");
6138 /* Create an unload breakpoint that only triggers when an unload of
6139 the specified dll (or any dll, if no pathname was specified)
6141 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6142 dll_pathname
, cond_string
);
6144 #endif /* SOLIB_ADD */
6146 /* Commands to deal with catching exceptions. */
6148 /* Set a breakpoint at the specified callback routine for an
6149 exception event callback */
6152 create_exception_catchpoint (int tempflag
, char *cond_string
,
6153 enum exception_event_kind ex_event
,
6154 struct symtab_and_line
*sal
)
6156 struct breakpoint
*b
;
6157 int thread
= -1; /* All threads. */
6160 if (!sal
) /* no exception support? */
6165 case EX_EVENT_THROW
:
6166 bptype
= bp_catch_throw
;
6168 case EX_EVENT_CATCH
:
6169 bptype
= bp_catch_catch
;
6171 default: /* error condition */
6172 error ("Internal error -- invalid catchpoint kind");
6175 b
= set_raw_breakpoint (*sal
, bptype
);
6176 set_breakpoint_count (breakpoint_count
+ 1);
6177 b
->number
= breakpoint_count
;
6179 b
->cond_string
= (cond_string
== NULL
) ?
6180 NULL
: savestring (cond_string
, strlen (cond_string
));
6182 b
->addr_string
= NULL
;
6183 b
->enable_state
= bp_enabled
;
6184 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6188 /* Deal with "catch catch" and "catch throw" commands */
6191 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6192 int tempflag
, int from_tty
)
6194 char *cond_string
= NULL
;
6195 struct symtab_and_line
*sal
= NULL
;
6197 ep_skip_leading_whitespace (&arg
);
6199 cond_string
= ep_parse_optional_if_clause (&arg
);
6201 if ((*arg
!= '\0') && !isspace (*arg
))
6202 error ("Junk at end of arguments.");
6204 if ((ex_event
!= EX_EVENT_THROW
) &&
6205 (ex_event
!= EX_EVENT_CATCH
))
6206 error ("Unsupported or unknown exception event; cannot catch it");
6208 /* See if we can find a callback routine */
6209 sal
= target_enable_exception_callback (ex_event
, 1);
6213 /* We have callbacks from the runtime system for exceptions.
6214 Set a breakpoint on the sal found, if no errors */
6215 if (sal
!= (struct symtab_and_line
*) -1)
6216 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6218 return; /* something went wrong with setting up callbacks */
6222 /* No callbacks from runtime system for exceptions.
6223 Try GNU C++ exception breakpoints using labels in debug info. */
6224 if (ex_event
== EX_EVENT_CATCH
)
6226 handle_gnu_4_16_catch_command (arg
, tempflag
, from_tty
);
6228 else if (ex_event
== EX_EVENT_THROW
)
6230 /* Set a breakpoint on __raise_exception () */
6232 warning ("Unsupported with this platform/compiler combination.");
6233 warning ("Perhaps you can achieve the effect you want by setting");
6234 warning ("a breakpoint on __raise_exception().");
6239 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6240 inside a catch_errors */
6243 cover_target_enable_exception_callback (void *arg
)
6245 args_for_catchpoint_enable
*args
= arg
;
6246 struct symtab_and_line
*sal
;
6247 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6250 else if (sal
== (struct symtab_and_line
*) -1)
6253 return 1; /*is valid */
6258 /* This is the original v.4.16 and earlier version of the
6259 catch_command_1() function. Now that other flavours of "catch"
6260 have been introduced, and since exception handling can be handled
6261 in other ways (through target ops) also, this is used only for the
6262 GNU C++ exception handling system.
6263 Note: Only the "catch" flavour of GDB 4.16 is handled here. The
6264 "catch NAME" is now no longer allowed in catch_command_1(). Also,
6265 there was no code in GDB 4.16 for "catch throw".
6267 Called from catch_exception_command_1 () */
6271 handle_gnu_4_16_catch_command (char *arg
, int tempflag
, int from_tty
)
6273 /* First, translate ARG into something we can deal with in terms
6276 struct symtabs_and_lines sals
;
6277 struct symtab_and_line sal
;
6278 register struct expression
*cond
= 0;
6279 register struct breakpoint
*b
;
6283 init_sal (&sal
); /* initialize to zeroes */
6285 /* If no arg given, or if first arg is 'if ', all active catch clauses
6286 are breakpointed. */
6288 if (!arg
|| (arg
[0] == 'i' && arg
[1] == 'f'
6289 && (arg
[2] == ' ' || arg
[2] == '\t')))
6291 /* Grab all active catch clauses. */
6292 sals
= get_catch_sals (0);
6296 /* Grab selected catch clauses. */
6297 error ("catch NAME not implemented");
6300 /* Not sure why this code has been disabled. I'm leaving
6301 it disabled. We can never come here now anyway
6302 since we don't allow the "catch NAME" syntax.
6305 /* This isn't used; I don't know what it was for. */
6306 sals
= map_catch_names (arg
, catch_breakpoint
);
6314 for (i
= 0; i
< sals
.nelts
; i
++)
6316 resolve_sal_pc (&sals
.sals
[i
]);
6320 if (arg
[0] == 'i' && arg
[1] == 'f'
6321 && (arg
[2] == ' ' || arg
[2] == '\t'))
6322 cond
= parse_exp_1 ((arg
+= 2, &arg
),
6323 block_for_pc (sals
.sals
[i
].pc
), 0);
6325 error ("Junk at end of arguments.");
6330 for (i
= 0; i
< sals
.nelts
; i
++)
6335 describe_other_breakpoints (sal
.pc
, sal
.section
);
6337 /* Important -- this is an ordinary breakpoint. For platforms
6338 with callback support for exceptions,
6339 create_exception_catchpoint() will create special bp types
6340 (bp_catch_catch and bp_catch_throw), and there is code in
6341 insert_breakpoints() and elsewhere that depends on that. */
6342 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6343 set_breakpoint_count (breakpoint_count
+ 1);
6344 b
->number
= breakpoint_count
;
6347 b
->enable_state
= bp_enabled
;
6348 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6355 warning ("Multiple breakpoints were set.");
6356 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
6362 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6365 /* The first argument may be an event name, such as "start" or "load".
6366 If so, then handle it as such. If it doesn't match an event name,
6367 then attempt to interpret it as an exception name. (This latter is
6368 the v4.16-and-earlier GDB meaning of the "catch" command.)
6370 First, try to find the bounds of what might be an event name. */
6371 char *arg1_start
= arg
;
6375 if (arg1_start
== NULL
)
6377 /* Old behaviour was to use pre-v-4.16 syntax */
6378 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6380 /* Now, this is not allowed */
6381 error ("Catch requires an event name.");
6384 arg1_end
= ep_find_event_name_end (arg1_start
);
6385 if (arg1_end
== NULL
)
6386 error ("catch requires an event");
6387 arg1_length
= arg1_end
+ 1 - arg1_start
;
6389 /* Try to match what we found against known event names. */
6390 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6392 error ("Catch of signal not yet implemented");
6394 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6396 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6397 tempflag
, from_tty
);
6399 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6401 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6402 tempflag
, from_tty
);
6404 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6406 error ("Catch of thread_start not yet implemented");
6408 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6410 error ("Catch of thread_exit not yet implemented");
6412 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6414 error ("Catch of thread_join not yet implemented");
6416 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6418 error ("Catch of start not yet implemented");
6420 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6422 error ("Catch of exit not yet implemented");
6424 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6426 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6427 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6429 error ("Catch of fork not yet implemented");
6432 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6434 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6435 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6437 error ("Catch of vfork not yet implemented");
6440 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6442 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6443 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6445 error ("Catch of exec not yet implemented");
6448 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6450 #if defined(SOLIB_ADD)
6451 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6453 error ("Catch of load not implemented");
6456 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6458 #if defined(SOLIB_ADD)
6459 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6461 error ("Catch of load not implemented");
6464 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6466 error ("Catch of stop not yet implemented");
6469 /* This doesn't appear to be an event name */
6473 /* Pre-v.4.16 behaviour was to treat the argument
6474 as the name of an exception */
6475 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6476 /* Now this is not allowed */
6477 error ("Unknown event kind specified for catch");
6482 /* Used by the gui, could be made a worker for other things. */
6485 set_breakpoint_sal (struct symtab_and_line sal
)
6487 struct breakpoint
*b
;
6488 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6489 set_breakpoint_count (breakpoint_count
+ 1);
6490 b
->number
= breakpoint_count
;
6497 /* These aren't used; I don't know what they were for. */
6498 /* Disable breakpoints on all catch clauses described in ARGS. */
6500 disable_catch (char *args
)
6502 /* Map the disable command to catch clauses described in ARGS. */
6505 /* Enable breakpoints on all catch clauses described in ARGS. */
6507 enable_catch (char *args
)
6509 /* Map the disable command to catch clauses described in ARGS. */
6512 /* Delete breakpoints on all catch clauses in the active scope. */
6514 delete_catch (char *args
)
6516 /* Map the delete command to catch clauses described in ARGS. */
6521 catch_command (char *arg
, int from_tty
)
6523 catch_command_1 (arg
, 0, from_tty
);
6528 tcatch_command (char *arg
, int from_tty
)
6530 catch_command_1 (arg
, 1, from_tty
);
6533 /* Delete breakpoints by address or line. */
6536 clear_command (char *arg
, int from_tty
)
6538 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6540 struct symtabs_and_lines sals
;
6541 struct symtab_and_line sal
;
6546 sals
= decode_line_spec (arg
, 1);
6551 sals
.sals
= (struct symtab_and_line
*)
6552 xmalloc (sizeof (struct symtab_and_line
));
6553 make_cleanup (xfree
, sals
.sals
);
6554 init_sal (&sal
); /* initialize to zeroes */
6555 sal
.line
= default_breakpoint_line
;
6556 sal
.symtab
= default_breakpoint_symtab
;
6557 sal
.pc
= default_breakpoint_address
;
6558 if (sal
.symtab
== 0)
6559 error ("No source file specified.");
6567 /* For each line spec given, delete bps which correspond
6568 to it. Do it in two passes, solely to preserve the current
6569 behavior that from_tty is forced true if we delete more than
6573 for (i
= 0; i
< sals
.nelts
; i
++)
6575 /* If exact pc given, clear bpts at that pc.
6576 If line given (pc == 0), clear all bpts on specified line.
6577 If defaulting, clear all bpts on default line
6580 defaulting sal.pc != 0 tests to do
6585 1 0 <can't happen> */
6590 /* Find all matching breakpoints, remove them from the
6591 breakpoint chain, and add them to the 'found' chain. */
6592 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6594 /* Are we going to delete b? */
6595 if (b
->type
!= bp_none
6596 && b
->type
!= bp_watchpoint
6597 && b
->type
!= bp_hardware_watchpoint
6598 && b
->type
!= bp_read_watchpoint
6599 && b
->type
!= bp_access_watchpoint
6600 /* Not if b is a watchpoint of any sort... */
6601 && (((sal
.pc
&& (b
->address
== sal
.pc
))
6602 && (!section_is_overlay (b
->section
)
6603 || b
->section
== sal
.section
))
6604 /* Yes, if sal.pc matches b (modulo overlays). */
6605 || ((default_match
|| (0 == sal
.pc
))
6606 && b
->source_file
!= NULL
6607 && sal
.symtab
!= NULL
6608 && STREQ (b
->source_file
, sal
.symtab
->filename
)
6609 && b
->line_number
== sal
.line
)))
6610 /* Yes, if sal source file and line matches b. */
6612 /* Remove it from breakpoint_chain... */
6613 if (b
== breakpoint_chain
)
6615 /* b is at the head of the list */
6616 breakpoint_chain
= b
->next
;
6620 prev
->next
= b
->next
;
6622 /* And add it to 'found' chain. */
6628 /* Keep b, and keep a pointer to it. */
6633 /* Now go thru the 'found' chain and delete them. */
6637 error ("No breakpoint at %s.", arg
);
6639 error ("No breakpoint at this line.");
6643 from_tty
= 1; /* Always report if deleted more than one */
6645 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6646 breakpoints_changed ();
6650 printf_unfiltered ("%d ", found
->number
);
6652 delete_breakpoint (found
);
6656 putchar_unfiltered ('\n');
6659 /* Delete breakpoint in BS if they are `delete' breakpoints and
6660 all breakpoints that are marked for deletion, whether hit or not.
6661 This is called after any breakpoint is hit, or after errors. */
6664 breakpoint_auto_delete (bpstat bs
)
6666 struct breakpoint
*b
, *temp
;
6668 for (; bs
; bs
= bs
->next
)
6669 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6671 delete_breakpoint (bs
->breakpoint_at
);
6673 ALL_BREAKPOINTS_SAFE (b
, temp
)
6675 if (b
->disposition
== disp_del_at_next_stop
)
6676 delete_breakpoint (b
);
6680 /* Delete a breakpoint and clean up all traces of it in the data
6684 delete_breakpoint (struct breakpoint
*bpt
)
6686 register struct breakpoint
*b
;
6690 error ("Internal error (attempted to delete a NULL breakpoint)");
6693 /* Has this bp already been deleted? This can happen because multiple
6694 lists can hold pointers to bp's. bpstat lists are especial culprits.
6696 One example of this happening is a watchpoint's scope bp. When the
6697 scope bp triggers, we notice that the watchpoint is out of scope, and
6698 delete it. We also delete its scope bp. But the scope bp is marked
6699 "auto-deleting", and is already on a bpstat. That bpstat is then
6700 checked for auto-deleting bp's, which are deleted.
6702 A real solution to this problem might involve reference counts in bp's,
6703 and/or giving them pointers back to their referencing bpstat's, and
6704 teaching delete_breakpoint to only free a bp's storage when no more
6705 references were extent. A cheaper bandaid was chosen. */
6706 if (bpt
->type
== bp_none
)
6709 if (delete_breakpoint_hook
)
6710 delete_breakpoint_hook (bpt
);
6711 breakpoint_delete_event (bpt
->number
);
6714 remove_breakpoint (bpt
, mark_inserted
);
6716 if (breakpoint_chain
== bpt
)
6717 breakpoint_chain
= bpt
->next
;
6719 /* If we have callback-style exception catchpoints, don't go through
6720 the adjustments to the C++ runtime library etc. if the inferior
6721 isn't actually running. target_enable_exception_callback for a
6722 null target ops vector gives an undesirable error message, so we
6723 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6724 exceptions are supported in this way, it's OK for now. FIXME */
6725 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6727 static char message1
[] = "Error in deleting catchpoint %d:\n";
6728 static char message
[sizeof (message1
) + 30];
6729 args_for_catchpoint_enable args
;
6731 /* Format possible error msg */
6732 sprintf (message
, message1
, bpt
->number
);
6733 args
.kind
= bpt
->type
== bp_catch_catch
?
6734 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6736 catch_errors (cover_target_enable_exception_callback
, &args
,
6737 message
, RETURN_MASK_ALL
);
6744 b
->next
= bpt
->next
;
6748 check_duplicates (bpt
);
6749 /* If this breakpoint was inserted, and there is another breakpoint
6750 at the same address, we need to insert the other breakpoint. */
6752 && bpt
->type
!= bp_hardware_watchpoint
6753 && bpt
->type
!= bp_read_watchpoint
6754 && bpt
->type
!= bp_access_watchpoint
6755 && bpt
->type
!= bp_catch_fork
6756 && bpt
->type
!= bp_catch_vfork
6757 && bpt
->type
!= bp_catch_exec
)
6760 if (b
->address
== bpt
->address
6761 && b
->section
== bpt
->section
6763 && b
->enable_state
!= bp_disabled
6764 && b
->enable_state
!= bp_shlib_disabled
6765 && b
->enable_state
!= bp_call_disabled
)
6769 /* We should never reach this point if there is a permanent
6770 breakpoint at the same address as the one being deleted.
6771 If there is a permanent breakpoint somewhere, it should
6772 always be the only one inserted. */
6773 if (b
->enable_state
== bp_permanent
)
6774 internal_error (__FILE__
, __LINE__
,
6775 "another breakpoint was inserted on top of "
6776 "a permanent breakpoint");
6778 if (b
->type
== bp_hardware_breakpoint
)
6779 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
6781 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
6783 /* If there was an error in the insert, print a message, then stop execution. */
6786 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6787 make_cleanup_ui_file_delete (tmp_error_stream
);
6790 if (b
->type
== bp_hardware_breakpoint
)
6792 fprintf_unfiltered (tmp_error_stream
,
6793 "Cannot insert hardware breakpoint %d.\n"
6794 "You may have requested too many hardware breakpoints.\n",
6799 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6800 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6801 print_address_numeric (b
->address
, 1, tmp_error_stream
);
6802 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6803 safe_strerror (val
));
6806 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6807 target_terminal_ours_for_output ();
6808 error_stream(tmp_error_stream
);
6815 free_command_lines (&bpt
->commands
);
6818 if (bpt
->cond_string
!= NULL
)
6819 xfree (bpt
->cond_string
);
6820 if (bpt
->addr_string
!= NULL
)
6821 xfree (bpt
->addr_string
);
6822 if (bpt
->exp
!= NULL
)
6824 if (bpt
->exp_string
!= NULL
)
6825 xfree (bpt
->exp_string
);
6826 if (bpt
->val
!= NULL
)
6827 value_free (bpt
->val
);
6828 if (bpt
->source_file
!= NULL
)
6829 xfree (bpt
->source_file
);
6830 if (bpt
->dll_pathname
!= NULL
)
6831 xfree (bpt
->dll_pathname
);
6832 if (bpt
->triggered_dll_pathname
!= NULL
)
6833 xfree (bpt
->triggered_dll_pathname
);
6834 if (bpt
->exec_pathname
!= NULL
)
6835 xfree (bpt
->exec_pathname
);
6837 /* Be sure no bpstat's are pointing at it after it's been freed. */
6838 /* FIXME, how can we find all bpstat's?
6839 We just check stop_bpstat for now. */
6840 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6841 if (bs
->breakpoint_at
== bpt
)
6843 bs
->breakpoint_at
= NULL
;
6845 /* bs->commands will be freed later. */
6847 /* On the chance that someone will soon try again to delete this same
6848 bp, we mark it as deleted before freeing its storage. */
6849 bpt
->type
= bp_none
;
6855 do_delete_breakpoint_cleanup (void *b
)
6857 delete_breakpoint (b
);
6861 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6863 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6867 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6869 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6873 delete_command (char *arg
, int from_tty
)
6875 struct breakpoint
*b
, *temp
;
6881 int breaks_to_delete
= 0;
6883 /* Delete all breakpoints if no argument.
6884 Do not delete internal or call-dummy breakpoints, these
6885 have to be deleted with an explicit breakpoint number argument. */
6888 if (b
->type
!= bp_call_dummy
&&
6889 b
->type
!= bp_shlib_event
&&
6890 b
->type
!= bp_thread_event
&&
6891 b
->type
!= bp_overlay_event
&&
6893 breaks_to_delete
= 1;
6896 /* Ask user only if there are some breakpoints to delete. */
6898 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
6900 ALL_BREAKPOINTS_SAFE (b
, temp
)
6902 if (b
->type
!= bp_call_dummy
&&
6903 b
->type
!= bp_shlib_event
&&
6904 b
->type
!= bp_thread_event
&&
6905 b
->type
!= bp_overlay_event
&&
6907 delete_breakpoint (b
);
6912 map_breakpoint_numbers (arg
, delete_breakpoint
);
6915 /* Reset a breakpoint given it's struct breakpoint * BINT.
6916 The value we return ends up being the return value from catch_errors.
6917 Unused in this case. */
6920 breakpoint_re_set_one (void *bint
)
6922 /* get past catch_errs */
6923 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6926 struct symtabs_and_lines sals
;
6928 enum enable_state save_enable
;
6933 warning ("attempted to reset apparently deleted breakpoint #%d?",
6937 case bp_hardware_breakpoint
:
6939 case bp_catch_unload
:
6940 if (b
->addr_string
== NULL
)
6942 /* Anything without a string can't be re-set. */
6943 delete_breakpoint (b
);
6946 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6948 ``And a hack it is, although Apple's Darwin version of GDB
6949 contains an almost identical hack to implement a "future
6950 break" command. It seems to work in many real world cases,
6951 but it is easy to come up with a test case where the patch
6952 doesn't help at all.''
6954 ``It seems that the way GDB implements breakpoints - in -
6955 shared - libraries was designed for a.out shared library
6956 systems (SunOS 4) where shared libraries were loaded at a
6957 fixed address in memory. Since ELF shared libraries can (and
6958 will) be loaded at any address in memory, things break.
6959 Fixing this is not trivial. Therefore, I'm not sure whether
6960 we should add this hack to the branch only. I cannot
6961 guarantee that things will be fixed on the trunk in the near
6964 In case we have a problem, disable this breakpoint. We'll
6965 restore its status if we succeed. Don't disable a
6966 shlib_disabled breakpoint though. There's a fair chance we
6967 can't re-set it if the shared library it's in hasn't been
6969 save_enable
= b
->enable_state
;
6970 if (b
->enable_state
!= bp_shlib_disabled
)
6971 b
->enable_state
= bp_disabled
;
6973 set_language (b
->language
);
6974 input_radix
= b
->input_radix
;
6976 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
);
6977 for (i
= 0; i
< sals
.nelts
; i
++)
6979 resolve_sal_pc (&sals
.sals
[i
]);
6981 /* Reparse conditions, they might contain references to the
6983 if (b
->cond_string
!= NULL
)
6988 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
6991 /* We need to re-set the breakpoint if the address changes... */
6992 if (b
->address
!= sals
.sals
[i
].pc
6993 /* ...or new and old breakpoints both have source files, and
6994 the source file name or the line number changes... */
6995 || (b
->source_file
!= NULL
6996 && sals
.sals
[i
].symtab
!= NULL
6997 && (!STREQ (b
->source_file
, sals
.sals
[i
].symtab
->filename
)
6998 || b
->line_number
!= sals
.sals
[i
].line
)
7000 /* ...or we switch between having a source file and not having
7002 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
7005 if (b
->source_file
!= NULL
)
7006 xfree (b
->source_file
);
7007 if (sals
.sals
[i
].symtab
== NULL
)
7008 b
->source_file
= NULL
;
7011 savestring (sals
.sals
[i
].symtab
->filename
,
7012 strlen (sals
.sals
[i
].symtab
->filename
));
7013 b
->line_number
= sals
.sals
[i
].line
;
7014 b
->address
= sals
.sals
[i
].pc
;
7016 /* Used to check for duplicates here, but that can
7017 cause trouble, as it doesn't check for disabled
7022 /* Might be better to do this just once per breakpoint_re_set,
7023 rather than once for every breakpoint. */
7024 breakpoints_changed ();
7026 b
->section
= sals
.sals
[i
].section
;
7027 b
->enable_state
= save_enable
; /* Restore it, this worked. */
7030 /* Now that this is re-enabled, check_duplicates
7032 check_duplicates (b
);
7039 case bp_hardware_watchpoint
:
7040 case bp_read_watchpoint
:
7041 case bp_access_watchpoint
:
7042 innermost_block
= NULL
;
7043 /* The issue arises of what context to evaluate this in. The
7044 same one as when it was set, but what does that mean when
7045 symbols have been re-read? We could save the filename and
7046 functionname, but if the context is more local than that, the
7047 best we could do would be something like how many levels deep
7048 and which index at that particular level, but that's going to
7049 be less stable than filenames or function names. */
7051 /* So for now, just use a global context. */
7054 b
->exp
= parse_expression (b
->exp_string
);
7055 b
->exp_valid_block
= innermost_block
;
7056 mark
= value_mark ();
7058 value_free (b
->val
);
7059 b
->val
= evaluate_expression (b
->exp
);
7060 release_value (b
->val
);
7061 if (VALUE_LAZY (b
->val
) && b
->enable_state
== bp_enabled
)
7062 value_fetch_lazy (b
->val
);
7064 if (b
->cond_string
!= NULL
)
7069 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7071 if (b
->enable_state
== bp_enabled
)
7073 value_free_to_mark (mark
);
7075 case bp_catch_catch
:
7076 case bp_catch_throw
:
7078 /* We needn't really do anything to reset these, since the mask
7079 that requests them is unaffected by e.g., new libraries being
7082 case bp_catch_vfork
:
7087 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
7089 /* Delete longjmp and overlay event breakpoints; they will be
7090 reset later by breakpoint_re_set. */
7092 case bp_longjmp_resume
:
7093 case bp_overlay_event
:
7094 delete_breakpoint (b
);
7097 /* This breakpoint is special, it's set up when the inferior
7098 starts and we really don't want to touch it. */
7099 case bp_shlib_event
:
7101 /* Like bp_shlib_event, this breakpoint type is special.
7102 Once it is set up, we do not want to touch it. */
7103 case bp_thread_event
:
7105 /* Keep temporary breakpoints, which can be encountered when we step
7106 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7107 Otherwise these should have been blown away via the cleanup chain
7108 or by breakpoint_init_inferior when we rerun the executable. */
7111 case bp_watchpoint_scope
:
7113 case bp_step_resume
:
7120 /* Re-set all breakpoints after symbols have been re-loaded. */
7122 breakpoint_re_set (void)
7124 struct breakpoint
*b
, *temp
;
7125 enum language save_language
;
7126 int save_input_radix
;
7127 static char message1
[] = "Error in re-setting breakpoint %d:\n";
7128 char message
[sizeof (message1
) + 30 /* slop */ ];
7130 save_language
= current_language
->la_language
;
7131 save_input_radix
= input_radix
;
7132 ALL_BREAKPOINTS_SAFE (b
, temp
)
7134 /* Format possible error msg */
7135 sprintf (message
, message1
, b
->number
);
7136 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7138 set_language (save_language
);
7139 input_radix
= save_input_radix
;
7141 if (GET_LONGJMP_TARGET_P ())
7143 create_longjmp_breakpoint ("longjmp");
7144 create_longjmp_breakpoint ("_longjmp");
7145 create_longjmp_breakpoint ("siglongjmp");
7146 create_longjmp_breakpoint ("_siglongjmp");
7147 create_longjmp_breakpoint (NULL
);
7150 create_overlay_event_breakpoint ("_ovly_debug_event");
7153 /* Reset the thread number of this breakpoint:
7155 - If the breakpoint is for all threads, leave it as-is.
7156 - Else, reset it to the current thread for inferior_ptid. */
7158 breakpoint_re_set_thread (struct breakpoint
*b
)
7160 if (b
->thread
!= -1)
7162 if (in_thread_list (inferior_ptid
))
7163 b
->thread
= pid_to_thread_id (inferior_ptid
);
7167 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7168 If from_tty is nonzero, it prints a message to that effect,
7169 which ends with a period (no newline). */
7172 set_ignore_count (int bptnum
, int count
, int from_tty
)
7174 register struct breakpoint
*b
;
7180 if (b
->number
== bptnum
)
7182 b
->ignore_count
= count
;
7186 printf_filtered ("Will stop next time breakpoint %d is reached.",
7188 else if (count
== 1)
7189 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7192 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7195 breakpoints_changed ();
7196 breakpoint_modify_event (b
->number
);
7200 error ("No breakpoint number %d.", bptnum
);
7203 /* Clear the ignore counts of all breakpoints. */
7205 breakpoint_clear_ignore_counts (void)
7207 struct breakpoint
*b
;
7210 b
->ignore_count
= 0;
7213 /* Command to set ignore-count of breakpoint N to COUNT. */
7216 ignore_command (char *args
, int from_tty
)
7222 error_no_arg ("a breakpoint number");
7224 num
= get_number (&p
);
7226 error ("bad breakpoint number: '%s'", args
);
7228 error ("Second argument (specified ignore-count) is missing.");
7230 set_ignore_count (num
,
7231 longest_to_int (value_as_long (parse_and_eval (p
))),
7234 printf_filtered ("\n");
7237 /* Call FUNCTION on each of the breakpoints
7238 whose numbers are given in ARGS. */
7241 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7243 register char *p
= args
;
7246 register struct breakpoint
*b
, *tmp
;
7250 error_no_arg ("one or more breakpoint numbers");
7257 num
= get_number_or_range (&p1
);
7260 warning ("bad breakpoint number at or near '%s'", p
);
7264 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7265 if (b
->number
== num
)
7267 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7270 if (related_breakpoint
)
7271 function (related_breakpoint
);
7275 printf_unfiltered ("No breakpoint number %d.\n", num
);
7281 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7282 If from_tty is nonzero, it prints a message to that effect,
7283 which ends with a period (no newline). */
7286 disable_breakpoint (struct breakpoint
*bpt
)
7288 /* Never disable a watchpoint scope breakpoint; we want to
7289 hit them when we leave scope so we can delete both the
7290 watchpoint and its scope breakpoint at that time. */
7291 if (bpt
->type
== bp_watchpoint_scope
)
7294 /* You can't disable permanent breakpoints. */
7295 if (bpt
->enable_state
== bp_permanent
)
7298 bpt
->enable_state
= bp_disabled
;
7300 check_duplicates (bpt
);
7302 if (modify_breakpoint_hook
)
7303 modify_breakpoint_hook (bpt
);
7304 breakpoint_modify_event (bpt
->number
);
7309 disable_command (char *args
, int from_tty
)
7311 register struct breakpoint
*bpt
;
7313 ALL_BREAKPOINTS (bpt
)
7317 warning ("attempted to disable apparently deleted breakpoint #%d?",
7322 case bp_catch_unload
:
7324 case bp_catch_vfork
:
7326 case bp_catch_catch
:
7327 case bp_catch_throw
:
7328 case bp_hardware_breakpoint
:
7330 case bp_hardware_watchpoint
:
7331 case bp_read_watchpoint
:
7332 case bp_access_watchpoint
:
7333 disable_breakpoint (bpt
);
7338 map_breakpoint_numbers (args
, disable_breakpoint
);
7342 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7344 struct frame_info
*save_selected_frame
= NULL
;
7345 int save_selected_frame_level
= -1;
7346 int target_resources_ok
, other_type_used
;
7349 if (bpt
->type
== bp_hardware_breakpoint
)
7352 i
= hw_breakpoint_used_count ();
7353 target_resources_ok
=
7354 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7356 if (target_resources_ok
== 0)
7357 error ("No hardware breakpoint support in the target.");
7358 else if (target_resources_ok
< 0)
7359 error ("Hardware breakpoints used exceeds limit.");
7362 if (bpt
->enable_state
!= bp_permanent
)
7363 bpt
->enable_state
= bp_enabled
;
7364 bpt
->disposition
= disposition
;
7365 check_duplicates (bpt
);
7366 breakpoints_changed ();
7368 if (bpt
->type
== bp_watchpoint
||
7369 bpt
->type
== bp_hardware_watchpoint
||
7370 bpt
->type
== bp_read_watchpoint
||
7371 bpt
->type
== bp_access_watchpoint
)
7373 if (bpt
->exp_valid_block
!= NULL
)
7375 struct frame_info
*fr
=
7376 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7380 Cannot enable watchpoint %d because the block in which its expression\n\
7381 is valid is not currently in scope.\n", bpt
->number
);
7382 bpt
->enable_state
= bp_disabled
;
7386 save_selected_frame
= deprecated_selected_frame
;
7387 save_selected_frame_level
= frame_relative_level (deprecated_selected_frame
);
7391 value_free (bpt
->val
);
7392 mark
= value_mark ();
7393 bpt
->val
= evaluate_expression (bpt
->exp
);
7394 release_value (bpt
->val
);
7395 if (VALUE_LAZY (bpt
->val
))
7396 value_fetch_lazy (bpt
->val
);
7398 if (bpt
->type
== bp_hardware_watchpoint
||
7399 bpt
->type
== bp_read_watchpoint
||
7400 bpt
->type
== bp_access_watchpoint
)
7402 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7403 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7405 /* Hack around 'unused var' error for some targets here */
7407 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7408 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7409 /* we can consider of type is bp_hardware_watchpoint, convert to
7410 bp_watchpoint in the following condition */
7411 if (target_resources_ok
< 0)
7414 Cannot enable watchpoint %d because target watch resources\n\
7415 have been allocated for other watchpoints.\n", bpt
->number
);
7416 bpt
->enable_state
= bp_disabled
;
7417 value_free_to_mark (mark
);
7422 if (save_selected_frame_level
>= 0)
7423 select_frame (save_selected_frame
);
7424 value_free_to_mark (mark
);
7426 if (modify_breakpoint_hook
)
7427 modify_breakpoint_hook (bpt
);
7428 breakpoint_modify_event (bpt
->number
);
7432 enable_breakpoint (struct breakpoint
*bpt
)
7434 do_enable_breakpoint (bpt
, bpt
->disposition
);
7437 /* The enable command enables the specified breakpoints (or all defined
7438 breakpoints) so they once again become (or continue to be) effective
7439 in stopping the inferior. */
7443 enable_command (char *args
, int from_tty
)
7445 register struct breakpoint
*bpt
;
7447 ALL_BREAKPOINTS (bpt
)
7451 warning ("attempted to enable apparently deleted breakpoint #%d?",
7456 case bp_catch_unload
:
7458 case bp_catch_vfork
:
7460 case bp_catch_catch
:
7461 case bp_catch_throw
:
7462 case bp_hardware_breakpoint
:
7464 case bp_hardware_watchpoint
:
7465 case bp_read_watchpoint
:
7466 case bp_access_watchpoint
:
7467 enable_breakpoint (bpt
);
7472 map_breakpoint_numbers (args
, enable_breakpoint
);
7476 enable_once_breakpoint (struct breakpoint
*bpt
)
7478 do_enable_breakpoint (bpt
, disp_disable
);
7483 enable_once_command (char *args
, int from_tty
)
7485 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7489 enable_delete_breakpoint (struct breakpoint
*bpt
)
7491 do_enable_breakpoint (bpt
, disp_del
);
7496 enable_delete_command (char *args
, int from_tty
)
7498 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7501 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7503 struct symtabs_and_lines
7504 decode_line_spec_1 (char *string
, int funfirstline
)
7506 struct symtabs_and_lines sals
;
7508 error ("Empty line specification.");
7509 if (default_breakpoint_valid
)
7510 sals
= decode_line_1 (&string
, funfirstline
,
7511 default_breakpoint_symtab
,
7512 default_breakpoint_line
,
7515 sals
= decode_line_1 (&string
, funfirstline
,
7516 (struct symtab
*) NULL
, 0, (char ***) NULL
);
7518 error ("Junk at end of line specification: %s", string
);
7523 _initialize_breakpoint (void)
7525 struct cmd_list_element
*c
;
7527 breakpoint_chain
= 0;
7528 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7529 before a breakpoint is set. */
7530 breakpoint_count
= 0;
7532 add_com ("ignore", class_breakpoint
, ignore_command
,
7533 "Set ignore-count of breakpoint number N to COUNT.\n\
7534 Usage is `ignore N COUNT'.");
7536 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7538 add_com ("commands", class_breakpoint
, commands_command
,
7539 "Set commands to be executed when a breakpoint is hit.\n\
7540 Give breakpoint number as argument after \"commands\".\n\
7541 With no argument, the targeted breakpoint is the last one set.\n\
7542 The commands themselves follow starting on the next line.\n\
7543 Type a line containing \"end\" to indicate the end of them.\n\
7544 Give \"silent\" as the first line to make the breakpoint silent;\n\
7545 then no output is printed when it is hit, except what the commands print.");
7547 add_com ("condition", class_breakpoint
, condition_command
,
7548 "Specify breakpoint number N to break only if COND is true.\n\
7549 Usage is `condition N COND', where N is an integer and COND is an\n\
7550 expression to be evaluated whenever breakpoint N is reached.");
7552 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7553 "Set a temporary breakpoint. Args like \"break\" command.\n\
7554 Like \"break\" except the breakpoint is only temporary,\n\
7555 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7556 by using \"enable delete\" on the breakpoint number.");
7557 set_cmd_completer (c
, location_completer
);
7559 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7560 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7561 Like \"break\" except the breakpoint requires hardware support,\n\
7562 some target hardware may not have this support.");
7563 set_cmd_completer (c
, location_completer
);
7565 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7566 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7567 Like \"hbreak\" except the breakpoint is only temporary,\n\
7568 so it will be deleted when hit.");
7569 set_cmd_completer (c
, location_completer
);
7571 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7572 "Enable some breakpoints.\n\
7573 Give breakpoint numbers (separated by spaces) as arguments.\n\
7574 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7575 This is used to cancel the effect of the \"disable\" command.\n\
7576 With a subcommand you can enable temporarily.",
7577 &enablelist
, "enable ", 1, &cmdlist
);
7579 add_com ("ab", class_breakpoint
, enable_command
,
7580 "Enable some breakpoints.\n\
7581 Give breakpoint numbers (separated by spaces) as arguments.\n\
7582 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7583 This is used to cancel the effect of the \"disable\" command.\n\
7584 With a subcommand you can enable temporarily.");
7586 add_com_alias ("en", "enable", class_breakpoint
, 1);
7588 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7589 "Enable some breakpoints.\n\
7590 Give breakpoint numbers (separated by spaces) as arguments.\n\
7591 This is used to cancel the effect of the \"disable\" command.\n\
7592 May be abbreviated to simply \"enable\".\n",
7593 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7595 add_cmd ("once", no_class
, enable_once_command
,
7596 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7597 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7600 add_cmd ("delete", no_class
, enable_delete_command
,
7601 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7602 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7605 add_cmd ("delete", no_class
, enable_delete_command
,
7606 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7607 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7610 add_cmd ("once", no_class
, enable_once_command
,
7611 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7612 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7615 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7616 "Disable some breakpoints.\n\
7617 Arguments are breakpoint numbers with spaces in between.\n\
7618 To disable all breakpoints, give no argument.\n\
7619 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7620 &disablelist
, "disable ", 1, &cmdlist
);
7621 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7622 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7624 add_com ("sb", class_breakpoint
, disable_command
,
7625 "Disable some breakpoints.\n\
7626 Arguments are breakpoint numbers with spaces in between.\n\
7627 To disable all breakpoints, give no argument.\n\
7628 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7630 add_cmd ("breakpoints", class_alias
, disable_command
,
7631 "Disable some breakpoints.\n\
7632 Arguments are breakpoint numbers with spaces in between.\n\
7633 To disable all breakpoints, give no argument.\n\
7634 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7635 This command may be abbreviated \"disable\".",
7638 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7639 "Delete some breakpoints or auto-display expressions.\n\
7640 Arguments are breakpoint numbers with spaces in between.\n\
7641 To delete all breakpoints, give no argument.\n\
7643 Also a prefix command for deletion of other GDB objects.\n\
7644 The \"unset\" command is also an alias for \"delete\".",
7645 &deletelist
, "delete ", 1, &cmdlist
);
7646 add_com_alias ("d", "delete", class_breakpoint
, 1);
7648 add_com ("db", class_breakpoint
, delete_command
,
7649 "Delete some breakpoints.\n\
7650 Arguments are breakpoint numbers with spaces in between.\n\
7651 To delete all breakpoints, give no argument.\n");
7653 add_cmd ("breakpoints", class_alias
, delete_command
,
7654 "Delete some breakpoints or auto-display expressions.\n\
7655 Arguments are breakpoint numbers with spaces in between.\n\
7656 To delete all breakpoints, give no argument.\n\
7657 This command may be abbreviated \"delete\".",
7660 add_com ("clear", class_breakpoint
, clear_command
,
7661 concat ("Clear breakpoint at specified line or function.\n\
7662 Argument may be line number, function name, or \"*\" and an address.\n\
7663 If line number is specified, all breakpoints in that line are cleared.\n\
7664 If function is specified, breakpoints at beginning of function are cleared.\n\
7665 If an address is specified, breakpoints at that address are cleared.\n\n",
7666 "With no argument, clears all breakpoints in the line that the selected frame\n\
7669 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7671 c
= add_com ("break", class_breakpoint
, break_command
,
7672 concat ("Set breakpoint at specified line or function.\n\
7673 Argument may be line number, function name, or \"*\" and an address.\n\
7674 If line number is specified, break at start of code for that line.\n\
7675 If function is specified, break at start of code for that function.\n\
7676 If an address is specified, break at that exact address.\n",
7677 "With no arg, uses current execution address of selected stack frame.\n\
7678 This is useful for breaking on return to a stack frame.\n\
7680 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7682 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7683 set_cmd_completer (c
, location_completer
);
7685 add_com_alias ("b", "break", class_run
, 1);
7686 add_com_alias ("br", "break", class_run
, 1);
7687 add_com_alias ("bre", "break", class_run
, 1);
7688 add_com_alias ("brea", "break", class_run
, 1);
7692 add_com_alias ("ba", "break", class_breakpoint
, 1);
7693 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7698 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7699 "Break in function/address or break at a line in the current file.",
7700 &stoplist
, "stop ", 1, &cmdlist
);
7701 add_cmd ("in", class_breakpoint
, stopin_command
,
7702 "Break in function or address.\n", &stoplist
);
7703 add_cmd ("at", class_breakpoint
, stopat_command
,
7704 "Break at a line in the current file.\n", &stoplist
);
7705 add_com ("status", class_info
, breakpoints_info
,
7706 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7707 The \"Type\" column indicates one of:\n\
7708 \tbreakpoint - normal breakpoint\n\
7709 \twatchpoint - watchpoint\n\
7710 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7711 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7712 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7713 address and file/line number respectively.\n\n",
7714 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7715 are set to the address of the last breakpoint listed.\n\n\
7716 Convenience variable \"$bpnum\" contains the number of the last\n\
7717 breakpoint set.", NULL
));
7720 add_info ("breakpoints", breakpoints_info
,
7721 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7722 The \"Type\" column indicates one of:\n\
7723 \tbreakpoint - normal breakpoint\n\
7724 \twatchpoint - watchpoint\n\
7725 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7726 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7727 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7728 address and file/line number respectively.\n\n",
7729 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7730 are set to the address of the last breakpoint listed.\n\n\
7731 Convenience variable \"$bpnum\" contains the number of the last\n\
7732 breakpoint set.", NULL
));
7735 add_com ("lb", class_breakpoint
, breakpoints_info
,
7736 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7737 The \"Type\" column indicates one of:\n\
7738 \tbreakpoint - normal breakpoint\n\
7739 \twatchpoint - watchpoint\n\
7740 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7741 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7742 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7743 address and file/line number respectively.\n\n",
7744 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7745 are set to the address of the last breakpoint listed.\n\n\
7746 Convenience variable \"$bpnum\" contains the number of the last\n\
7747 breakpoint set.", NULL
));
7749 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7750 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7751 The \"Type\" column indicates one of:\n\
7752 \tbreakpoint - normal breakpoint\n\
7753 \twatchpoint - watchpoint\n\
7754 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7755 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7756 \tuntil - internal breakpoint used by the \"until\" command\n\
7757 \tfinish - internal breakpoint used by the \"finish\" command\n",
7758 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7759 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7760 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7761 address and file/line number respectively.\n\n",
7762 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7763 are set to the address of the last breakpoint listed.\n\n\
7764 Convenience variable \"$bpnum\" contains the number of the last\n\
7765 breakpoint set.", NULL
),
7766 &maintenanceinfolist
);
7768 add_com ("catch", class_breakpoint
, catch_command
,
7769 "Set catchpoints to catch events.\n\
7770 Raised signals may be caught:\n\
7771 \tcatch signal - all signals\n\
7772 \tcatch signal <signame> - a particular signal\n\
7773 Raised exceptions may be caught:\n\
7774 \tcatch throw - all exceptions, when thrown\n\
7775 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7776 \tcatch catch - all exceptions, when caught\n\
7777 \tcatch catch <exceptname> - a particular exception, when caught\n\
7778 Thread or process events may be caught:\n\
7779 \tcatch thread_start - any threads, just after creation\n\
7780 \tcatch thread_exit - any threads, just before expiration\n\
7781 \tcatch thread_join - any threads, just after joins\n\
7782 Process events may be caught:\n\
7783 \tcatch start - any processes, just after creation\n\
7784 \tcatch exit - any processes, just before expiration\n\
7785 \tcatch fork - calls to fork()\n\
7786 \tcatch vfork - calls to vfork()\n\
7787 \tcatch exec - calls to exec()\n\
7788 Dynamically-linked library events may be caught:\n\
7789 \tcatch load - loads of any library\n\
7790 \tcatch load <libname> - loads of a particular library\n\
7791 \tcatch unload - unloads of any library\n\
7792 \tcatch unload <libname> - unloads of a particular library\n\
7793 The act of your program's execution stopping may also be caught:\n\
7795 C++ exceptions may be caught:\n\
7796 \tcatch throw - all exceptions, when thrown\n\
7797 \tcatch catch - all exceptions, when caught\n\
7799 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7800 after a fork or vfork is caught.\n\n\
7801 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7803 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7804 "Set temporary catchpoints to catch events.\n\
7805 Args like \"catch\" command.\n\
7806 Like \"catch\" except the catchpoint is only temporary,\n\
7807 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7808 by using \"enable delete\" on the catchpoint number.");
7810 c
= add_com ("watch", class_breakpoint
, watch_command
,
7811 "Set a watchpoint for an expression.\n\
7812 A watchpoint stops execution of your program whenever the value of\n\
7813 an expression changes.");
7814 set_cmd_completer (c
, location_completer
);
7816 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
7817 "Set a read watchpoint for an expression.\n\
7818 A watchpoint stops execution of your program whenever the value of\n\
7819 an expression is read.");
7820 set_cmd_completer (c
, location_completer
);
7822 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
7823 "Set a watchpoint for an expression.\n\
7824 A watchpoint stops execution of your program whenever the value of\n\
7825 an expression is either read or written.");
7826 set_cmd_completer (c
, location_completer
);
7828 add_info ("watchpoints", breakpoints_info
,
7829 "Synonym for ``info breakpoints''.");
7832 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
7833 (char *) &can_use_hw_watchpoints
,
7834 "Set debugger's willingness to use watchpoint hardware.\n\
7835 If zero, gdb will not use hardware for new watchpoints, even if\n\
7836 such is available. (However, any hardware watchpoints that were\n\
7837 created before setting this to nonzero, will continue to use watchpoint\n\
7840 add_show_from_set (c
, &showlist
);
7842 can_use_hw_watchpoints
= 1;