1 /* Everything about breakpoints, for GDB.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
28 #include "breakpoint.h"
30 #include "expression.h"
36 #include "gdbthread.h"
39 #include "gdb_string.h"
46 #include "completer.h"
49 #include "cli/cli-script.h"
50 #include "gdb_assert.h"
53 #include "gdb-events.h"
55 /* Prototypes for local functions. */
57 static void until_break_command_continuation (struct continuation_arg
*arg
);
59 static void catch_command_1 (char *, int, int);
61 static void enable_delete_command (char *, int);
63 static void enable_delete_breakpoint (struct breakpoint
*);
65 static void enable_once_command (char *, int);
67 static void enable_once_breakpoint (struct breakpoint
*);
69 static void disable_command (char *, int);
71 static void enable_command (char *, int);
73 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
75 static void ignore_command (char *, int);
77 static int breakpoint_re_set_one (void *);
79 static void clear_command (char *, int);
81 static void catch_command (char *, int);
83 static void watch_command (char *, int);
85 static int can_use_hardware_watchpoint (struct value
*);
87 extern void break_at_finish_command (char *, int);
88 extern void break_at_finish_at_depth_command (char *, int);
90 extern void tbreak_at_finish_command (char *, int);
92 static void break_command_1 (char *, int, int);
94 static void mention (struct breakpoint
*);
96 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
98 static void check_duplicates (struct breakpoint
*);
100 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
102 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
);
104 static void describe_other_breakpoints (CORE_ADDR
, asection
*);
106 static void breakpoints_info (char *, int);
108 static void breakpoint_1 (int, int);
110 static bpstat
bpstat_alloc (struct breakpoint
*, bpstat
);
112 static int breakpoint_cond_eval (void *);
114 static void cleanup_executing_breakpoints (void *);
116 static void commands_command (char *, int);
118 static void condition_command (char *, int);
120 static int get_number_trailer (char **, int);
122 void set_breakpoint_count (int);
131 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
133 static enum print_stop_action
print_it_typical (bpstat
);
135 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
139 enum exception_event_kind kind
;
142 args_for_catchpoint_enable
;
144 static int watchpoint_check (void *);
146 static int cover_target_enable_exception_callback (void *);
148 static void maintenance_info_breakpoints (char *, int);
150 static void create_longjmp_breakpoint (char *);
152 static void create_overlay_event_breakpoint (char *);
154 static int hw_breakpoint_used_count (void);
156 static int hw_watchpoint_used_count (enum bptype
, int *);
158 static void hbreak_command (char *, int);
160 static void thbreak_command (char *, int);
162 static void watch_command_1 (char *, int, int);
164 static void rwatch_command (char *, int);
166 static void awatch_command (char *, int);
168 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
170 static void solib_load_unload_1 (char *hookname
,
173 char *cond_string
, enum bptype bp_kind
);
175 static void create_fork_vfork_event_catchpoint (int tempflag
,
177 enum bptype bp_kind
);
179 static void break_at_finish_at_depth_command_1 (char *arg
,
180 int flag
, int from_tty
);
182 static void break_at_finish_command_1 (char *arg
, int flag
, int from_tty
);
184 static void stop_command (char *arg
, int from_tty
);
186 static void stopin_command (char *arg
, int from_tty
);
188 static void stopat_command (char *arg
, int from_tty
);
190 static char *ep_find_event_name_end (char *arg
);
192 static char *ep_parse_optional_if_clause (char **arg
);
194 static char *ep_parse_optional_filename (char **arg
);
196 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
197 static void catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
);
200 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
201 enum exception_event_kind ex_event
,
202 struct symtab_and_line
*sal
);
204 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
205 char *arg
, int tempflag
, int from_tty
);
207 static void tcatch_command (char *arg
, int from_tty
);
209 static void ep_skip_leading_whitespace (char **s
);
211 /* Prototypes for exported functions. */
213 /* If FALSE, gdb will not use hardware support for watchpoints, even
214 if such is available. */
215 static int can_use_hw_watchpoints
;
217 void _initialize_breakpoint (void);
219 extern int addressprint
; /* Print machine addresses? */
221 /* Are we executing breakpoint commands? */
222 static int executing_breakpoint_commands
;
224 /* Are overlay event breakpoints enabled? */
225 static int overlay_events_enabled
;
227 /* Walk the following statement or block through all breakpoints.
228 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
231 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
233 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
234 for (B = breakpoint_chain; \
235 B ? (TMP=B->next, 1): 0; \
238 /* Similar iterators for the low-level breakpoints. */
240 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->next)
242 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
243 for (B = bp_location_chain; \
244 B ? (TMP=B->next, 1): 0; \
247 /* True if SHIFT_INST_REGS defined, false otherwise. */
249 int must_shift_inst_regs
=
250 #if defined(SHIFT_INST_REGS)
257 /* True if breakpoint hit counts should be displayed in breakpoint info. */
259 int show_breakpoint_hit_counts
= 1;
261 /* Chains of all breakpoints defined. */
263 struct breakpoint
*breakpoint_chain
;
265 struct bp_location
*bp_location_chain
;
267 /* Number of last breakpoint made. */
269 int breakpoint_count
;
271 /* Pointer to current exception event record */
272 static struct exception_event_record
*current_exception_event
;
274 /* Indicator of whether exception catchpoints should be nuked
275 between runs of a program */
276 int exception_catchpoints_are_fragile
= 0;
278 /* Indicator of when exception catchpoints set-up should be
279 reinitialized -- e.g. when program is re-run */
280 int exception_support_initialized
= 0;
282 /* This function returns a pointer to the string representation of the
283 pathname of the dynamically-linked library that has just been
286 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
287 or undefined results are guaranteed.
289 This string's contents are only valid immediately after the
290 inferior has stopped in the dynamic linker hook, and becomes
291 invalid as soon as the inferior is continued. Clients should make
292 a copy of this string if they wish to continue the inferior and
293 then access the string. */
295 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
296 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
299 /* This function returns a pointer to the string representation of the
300 pathname of the dynamically-linked library that has just been
303 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
304 TRUE, or undefined results are guaranteed.
306 This string's contents are only valid immediately after the
307 inferior has stopped in the dynamic linker hook, and becomes
308 invalid as soon as the inferior is continued. Clients should make
309 a copy of this string if they wish to continue the inferior and
310 then access the string. */
312 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
313 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
316 /* This function is called by the "catch load" command. It allows the
317 debugger to be notified by the dynamic linker when a specified
318 library file (or any library file, if filename is NULL) is loaded. */
320 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
321 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
322 error ("catch of library loads not yet implemented on this platform")
325 /* This function is called by the "catch unload" command. It allows
326 the debugger to be notified by the dynamic linker when a specified
327 library file (or any library file, if filename is NULL) is
330 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
331 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
332 error ("catch of library unloads not yet implemented on this platform")
335 /* Set breakpoint count to NUM. */
338 set_breakpoint_count (int num
)
340 breakpoint_count
= num
;
341 set_internalvar (lookup_internalvar ("bpnum"),
342 value_from_longest (builtin_type_int
, (LONGEST
) num
));
345 /* Used in run_command to zero the hit count when a new run starts. */
348 clear_breakpoint_hit_counts (void)
350 struct breakpoint
*b
;
356 /* Default address, symtab and line to put a breakpoint at
357 for "break" command with no arg.
358 if default_breakpoint_valid is zero, the other three are
359 not valid, and "break" with no arg is an error.
361 This set by print_stack_frame, which calls set_default_breakpoint. */
363 int default_breakpoint_valid
;
364 CORE_ADDR default_breakpoint_address
;
365 struct symtab
*default_breakpoint_symtab
;
366 int default_breakpoint_line
;
368 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
369 Advance *PP after the string and any trailing whitespace.
371 Currently the string can either be a number or "$" followed by the name
372 of a convenience variable. Making it an expression wouldn't work well
373 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
375 TRAILER is a character which can be found after the number; most
376 commonly this is `-'. If you don't want a trailer, use \0. */
378 get_number_trailer (char **pp
, int trailer
)
380 int retval
= 0; /* default */
384 /* Empty line means refer to the last breakpoint. */
385 return breakpoint_count
;
388 /* Make a copy of the name, so we can null-terminate it
389 to pass to lookup_internalvar(). */
394 while (isalnum (*p
) || *p
== '_')
396 varname
= (char *) alloca (p
- start
+ 1);
397 strncpy (varname
, start
, p
- start
);
398 varname
[p
- start
] = '\0';
399 val
= value_of_internalvar (lookup_internalvar (varname
));
400 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_INT
)
401 retval
= (int) value_as_long (val
);
404 printf_filtered ("Convenience variable must have integer value.\n");
412 while (*p
>= '0' && *p
<= '9')
415 /* There is no number here. (e.g. "cond a == b"). */
417 /* Skip non-numeric token */
418 while (*p
&& !isspace((int) *p
))
420 /* Return zero, which caller must interpret as error. */
426 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
428 /* Trailing junk: return 0 and let caller print error msg. */
429 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
440 /* Like get_number_trailer, but don't allow a trailer. */
442 get_number (char **pp
)
444 return get_number_trailer (pp
, '\0');
447 /* Parse a number or a range.
448 * A number will be of the form handled by get_number.
449 * A range will be of the form <number1> - <number2>, and
450 * will represent all the integers between number1 and number2,
453 * While processing a range, this fuction is called iteratively;
454 * At each call it will return the next value in the range.
456 * At the beginning of parsing a range, the char pointer PP will
457 * be advanced past <number1> and left pointing at the '-' token.
458 * Subsequent calls will not advance the pointer until the range
459 * is completed. The call that completes the range will advance
460 * pointer PP past <number2>.
464 get_number_or_range (char **pp
)
466 static int last_retval
, end_value
;
467 static char *end_ptr
;
468 static int in_range
= 0;
472 /* Default case: pp is pointing either to a solo number,
473 or to the first number of a range. */
474 last_retval
= get_number_trailer (pp
, '-');
479 /* This is the start of a range (<number1> - <number2>).
480 Skip the '-', parse and remember the second number,
481 and also remember the end of the final token. */
485 while (isspace ((int) *end_ptr
))
486 end_ptr
++; /* skip white space */
487 end_value
= get_number (temp
);
488 if (end_value
< last_retval
)
490 error ("inverted range");
492 else if (end_value
== last_retval
)
494 /* degenerate range (number1 == number2). Advance the
495 token pointer so that the range will be treated as a
504 error ("negative value");
507 /* pp points to the '-' that betokens a range. All
508 number-parsing has already been done. Return the next
509 integer value (one greater than the saved previous value).
510 Do not advance the token pointer 'pp' until the end of range
513 if (++last_retval
== end_value
)
515 /* End of range reached; advance token pointer. */
525 /* condition N EXP -- set break condition of breakpoint N to EXP. */
528 condition_command (char *arg
, int from_tty
)
530 struct breakpoint
*b
;
535 error_no_arg ("breakpoint number");
538 bnum
= get_number (&p
);
540 error ("Bad breakpoint argument: '%s'", arg
);
543 if (b
->number
== bnum
)
550 if (b
->cond_string
!= NULL
)
551 xfree (b
->cond_string
);
556 b
->cond_string
= NULL
;
558 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
563 /* I don't know if it matters whether this is the string the user
564 typed in or the decompiled expression. */
565 b
->cond_string
= savestring (arg
, strlen (arg
));
566 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
568 error ("Junk at end of expression");
570 breakpoints_changed ();
571 breakpoint_modify_event (b
->number
);
575 error ("No breakpoint number %d.", bnum
);
579 commands_command (char *arg
, int from_tty
)
581 struct breakpoint
*b
;
584 struct command_line
*l
;
586 /* If we allowed this, we would have problems with when to
587 free the storage, if we change the commands currently
590 if (executing_breakpoint_commands
)
591 error ("Can't use the \"commands\" command among a breakpoint's commands.");
594 bnum
= get_number (&p
);
597 error ("Unexpected extra arguments following breakpoint number.");
600 if (b
->number
== bnum
)
602 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
604 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
605 l
= read_command_lines (tmpbuf
, from_tty
);
606 do_cleanups (cleanups
);
607 free_command_lines (&b
->commands
);
609 breakpoints_changed ();
610 breakpoint_modify_event (b
->number
);
613 error ("No breakpoint number %d.", bnum
);
616 /* Like target_read_memory() but if breakpoints are inserted, return
617 the shadow contents instead of the breakpoints themselves.
619 Read "memory data" from whatever target or inferior we have.
620 Returns zero if successful, errno value if not. EIO is used
621 for address out of bounds. If breakpoints are inserted, returns
622 shadow contents, not the breakpoints themselves. From breakpoint.c. */
625 read_memory_nobpt (CORE_ADDR memaddr
, char *myaddr
, unsigned len
)
628 struct bp_location
*b
;
629 CORE_ADDR bp_addr
= 0;
632 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
633 /* No breakpoints on this machine. */
634 return target_read_memory (memaddr
, myaddr
, len
);
638 if (b
->owner
->type
== bp_none
)
639 warning ("reading through apparently deleted breakpoint #%d?",
642 if (b
->loc_type
!= bp_loc_software_breakpoint
)
646 /* Addresses and length of the part of the breakpoint that
648 /* XXXX The m68k, sh and h8300 have different local and remote
649 breakpoint values. BREAKPOINT_FROM_PC still manages to
650 correctly determine the breakpoints memory address and size
651 for these targets. */
652 bp_addr
= b
->address
;
654 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
659 if (bp_addr
+ bp_size
<= memaddr
)
660 /* The breakpoint is entirely before the chunk of memory we
663 if (bp_addr
>= memaddr
+ len
)
664 /* The breakpoint is entirely after the chunk of memory we are
667 /* Copy the breakpoint from the shadow contents, and recurse for
668 the things before and after. */
670 /* Offset within shadow_contents. */
673 if (bp_addr
< memaddr
)
675 /* Only copy the second part of the breakpoint. */
676 bp_size
-= memaddr
- bp_addr
;
677 bptoffset
= memaddr
- bp_addr
;
681 if (bp_addr
+ bp_size
> memaddr
+ len
)
683 /* Only copy the first part of the breakpoint. */
684 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
687 memcpy (myaddr
+ bp_addr
- memaddr
,
688 b
->shadow_contents
+ bptoffset
, bp_size
);
690 if (bp_addr
> memaddr
)
692 /* Copy the section of memory before the breakpoint. */
693 status
= read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
698 if (bp_addr
+ bp_size
< memaddr
+ len
)
700 /* Copy the section of memory after the breakpoint. */
701 status
= read_memory_nobpt (bp_addr
+ bp_size
,
702 myaddr
+ bp_addr
+ bp_size
- memaddr
,
703 memaddr
+ len
- (bp_addr
+ bp_size
));
710 /* Nothing overlaps. Just call read_memory_noerr. */
711 return target_read_memory (memaddr
, myaddr
, len
);
715 /* A wrapper function for inserting catchpoints. */
717 insert_catchpoint (struct ui_out
*uo
, void *args
)
719 struct breakpoint
*b
= (struct breakpoint
*) args
;
725 val
= target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
728 val
= target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
731 val
= target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
734 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
739 throw_exception (RETURN_ERROR
);
744 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
745 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
746 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
748 NOTE drow/2003-09-09: This routine could be broken down to an object-style
749 method for each breakpoint or catchpoint type. */
751 insert_bp_location (struct bp_location
*bpt
,
752 struct ui_file
*tmp_error_stream
,
753 int *disabled_breaks
, int *process_warning
,
754 int *hw_breakpoint_error
)
758 /* Permanent breakpoints cannot be inserted or removed. Disabled
759 breakpoints should not be inserted. */
760 if (bpt
->owner
->enable_state
!= bp_enabled
)
763 if (bpt
->inserted
|| bpt
->duplicate
)
766 if (bpt
->loc_type
== bp_loc_software_breakpoint
767 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
769 /* First check to see if we have to handle an overlay. */
770 if (overlay_debugging
== ovly_off
771 || bpt
->section
== NULL
772 || !(section_is_overlay (bpt
->section
)))
774 /* No overlay handling: just set the breakpoint. */
776 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
777 val
= target_insert_hw_breakpoint (bpt
->address
,
778 bpt
->shadow_contents
);
780 val
= target_insert_breakpoint (bpt
->address
,
781 bpt
->shadow_contents
);
785 /* This breakpoint is in an overlay section.
786 Shall we set a breakpoint at the LMA? */
787 if (!overlay_events_enabled
)
789 /* Yes -- overlay event support is not active,
790 so we must try to set a breakpoint at the LMA.
791 This will not work for a hardware breakpoint. */
792 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
793 warning ("hardware breakpoint %d not supported in overlay!\n",
797 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
799 /* Set a software (trap) breakpoint at the LMA. */
800 val
= target_insert_breakpoint (addr
, bpt
->shadow_contents
);
802 fprintf_unfiltered (tmp_error_stream
,
803 "Overlay breakpoint %d failed: in ROM?",
807 /* Shall we set a breakpoint at the VMA? */
808 if (section_is_mapped (bpt
->section
))
810 /* Yes. This overlay section is mapped into memory. */
811 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
812 val
= target_insert_hw_breakpoint (bpt
->address
,
813 bpt
->shadow_contents
);
815 val
= target_insert_breakpoint (bpt
->address
,
816 bpt
->shadow_contents
);
820 /* No. This breakpoint will not be inserted.
821 No error, but do not mark the bp as 'inserted'. */
828 /* Can't set the breakpoint. */
829 #if defined (DISABLE_UNSETTABLE_BREAK)
830 if (DISABLE_UNSETTABLE_BREAK (bpt
->address
))
832 /* See also: disable_breakpoints_in_shlibs. */
834 bpt
->owner
->enable_state
= bp_shlib_disabled
;
835 if (!*disabled_breaks
)
837 fprintf_unfiltered (tmp_error_stream
,
838 "Cannot insert breakpoint %d.\n",
840 fprintf_unfiltered (tmp_error_stream
,
841 "Temporarily disabling shared library breakpoints:\n");
843 *disabled_breaks
= 1;
844 fprintf_unfiltered (tmp_error_stream
,
845 "breakpoint #%d\n", bpt
->owner
->number
);
850 #ifdef ONE_PROCESS_WRITETEXT
851 *process_warning
= 1;
853 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
855 *hw_breakpoint_error
= 1;
856 fprintf_unfiltered (tmp_error_stream
,
857 "Cannot insert hardware breakpoint %d.\n",
862 fprintf_unfiltered (tmp_error_stream
,
863 "Cannot insert breakpoint %d.\n",
865 fprintf_filtered (tmp_error_stream
,
866 "Error accessing memory address ");
867 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
868 fprintf_filtered (tmp_error_stream
, ": %s.\n",
869 safe_strerror (val
));
880 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
881 /* NOTE drow/2003-09-08: This state only exists for removing
882 watchpoints. It's not clear that it's necessary... */
883 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
885 /* FIXME drow/2003-09-08: This code sets multiple hardware watchpoints
886 based on the expression. Ideally this should happen at a higher level,
887 and there should be one bp_location for each computed address we
888 must watch. As soon as a many-to-one mapping is available I'll
891 struct frame_info
*saved_frame
;
892 int saved_level
, within_current_scope
;
893 struct value
*mark
= value_mark ();
896 /* Save the current frame and level so we can restore it after
897 evaluating the watchpoint expression on its own frame. */
898 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
899 took a frame parameter, so that we didn't have to change the
901 saved_frame
= deprecated_selected_frame
;
902 saved_level
= frame_relative_level (deprecated_selected_frame
);
904 /* Determine if the watchpoint is within scope. */
905 if (bpt
->owner
->exp_valid_block
== NULL
)
906 within_current_scope
= 1;
909 struct frame_info
*fi
;
910 fi
= frame_find_by_id (bpt
->owner
->watchpoint_frame
);
911 within_current_scope
= (fi
!= NULL
);
912 if (within_current_scope
)
916 if (within_current_scope
)
918 /* Evaluate the expression and cut the chain of values
919 produced off from the value chain.
921 Make sure the value returned isn't lazy; we use
922 laziness to determine what memory GDB actually needed
923 in order to compute the value of the expression. */
924 v
= evaluate_expression (bpt
->owner
->exp
);
926 value_release_to_mark (mark
);
928 bpt
->owner
->val_chain
= v
;
931 /* Look at each value on the value chain. */
932 for (; v
; v
= v
->next
)
934 /* If it's a memory location, and GDB actually needed
935 its contents to evaluate the expression, then we
937 if (VALUE_LVAL (v
) == lval_memory
940 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
942 /* We only watch structs and arrays if user asked
943 for it explicitly, never if they just happen to
944 appear in the middle of some value chain. */
945 if (v
== bpt
->owner
->val_chain
946 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
947 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
952 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
953 len
= TYPE_LENGTH (VALUE_TYPE (v
));
955 if (bpt
->owner
->type
== bp_read_watchpoint
)
957 else if (bpt
->owner
->type
== bp_access_watchpoint
)
960 val
= target_insert_watchpoint (addr
, len
, type
);
963 /* Don't exit the loop, try to insert
964 every value on the value chain. That's
965 because we will be removing all the
966 watches below, and removing a
967 watchpoint we didn't insert could have
975 /* Failure to insert a watchpoint on any memory value in the
976 value chain brings us here. */
979 remove_breakpoint (bpt
, mark_uninserted
);
980 *hw_breakpoint_error
= 1;
981 fprintf_unfiltered (tmp_error_stream
,
982 "Could not insert hardware watchpoint %d.\n",
989 printf_filtered ("Hardware watchpoint %d deleted ", bpt
->owner
->number
);
990 printf_filtered ("because the program has left the block \n");
991 printf_filtered ("in which its expression is valid.\n");
992 if (bpt
->owner
->related_breakpoint
)
993 bpt
->owner
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
994 bpt
->owner
->disposition
= disp_del_at_next_stop
;
997 /* Restore the frame and level. */
998 if (saved_frame
!= deprecated_selected_frame
999 || saved_level
!= frame_relative_level (deprecated_selected_frame
))
1000 select_frame (saved_frame
);
1005 else if (ep_is_exception_catchpoint (bpt
->owner
))
1007 /* FIXME drow/2003-09-09: This code sets both a catchpoint and a
1008 breakpoint. Once again, it would be better if this was represented
1009 as two bp_locations. */
1011 /* If we get here, we must have a callback mechanism for exception
1012 events -- with g++ style embedded label support, we insert
1013 ordinary breakpoints and not catchpoints. */
1014 val
= target_insert_breakpoint (bpt
->address
, bpt
->shadow_contents
);
1017 /* Couldn't set breakpoint for some reason */
1018 fprintf_unfiltered (tmp_error_stream
,
1019 "Cannot insert catchpoint %d; disabling it.\n",
1020 bpt
->owner
->number
);
1021 fprintf_filtered (tmp_error_stream
,
1022 "Error accessing memory address ");
1023 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
1024 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1025 safe_strerror (val
));
1026 bpt
->owner
->enable_state
= bp_disabled
;
1030 /* Bp set, now make sure callbacks are enabled */
1031 /* Format possible error msg */
1032 char *message
= xstrprintf ("Error inserting catchpoint %d:\n",
1033 bpt
->owner
->number
);
1034 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
1036 args_for_catchpoint_enable args
;
1037 args
.kind
= bpt
->owner
->type
== bp_catch_catch
?
1038 EX_EVENT_CATCH
: EX_EVENT_THROW
;
1040 val
= catch_errors (cover_target_enable_exception_callback
,
1041 &args
, message
, RETURN_MASK_ALL
);
1042 do_cleanups (cleanups
);
1043 if (val
!= 0 && val
!= -1)
1046 /* Check if something went wrong; val == 0 can be ignored */
1049 /* something went wrong */
1050 fprintf_unfiltered (tmp_error_stream
,
1051 "Cannot insert catchpoint %d; disabling it.\n",
1052 bpt
->owner
->number
);
1053 bpt
->owner
->enable_state
= bp_disabled
;
1060 else if (bpt
->owner
->type
== bp_catch_fork
1061 || bpt
->owner
->type
== bp_catch_vfork
1062 || bpt
->owner
->type
== bp_catch_exec
)
1064 char *prefix
= xstrprintf ("warning: inserting catchpoint %d: ",
1065 bpt
->owner
->number
);
1066 struct cleanup
*cleanups
= make_cleanup (xfree
, prefix
);
1067 val
= catch_exceptions (uiout
, insert_catchpoint
, bpt
->owner
, prefix
,
1069 do_cleanups (cleanups
);
1071 bpt
->owner
->enable_state
= bp_disabled
;
1075 /* We've already printed an error message if there was a problem
1076 inserting this catchpoint, and we've disabled the catchpoint,
1077 so just return success. */
1084 /* insert_breakpoints is used when starting or continuing the program.
1085 remove_breakpoints is used when the program stops.
1086 Both return zero if successful,
1087 or an `errno' value if could not write the inferior. */
1090 insert_breakpoints (void)
1092 struct bp_location
*b
, *temp
;
1093 int return_val
= 0; /* return success code. */
1095 int disabled_breaks
= 0;
1096 int hw_breakpoint_error
= 0;
1097 int process_warning
= 0;
1099 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1100 make_cleanup_ui_file_delete (tmp_error_stream
);
1102 /* Explicitly mark the warning -- this will only be printed if
1103 there was an error. */
1104 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1106 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1108 /* Permanent breakpoints cannot be inserted or removed. Disabled
1109 breakpoints should not be inserted. */
1110 if (b
->owner
->enable_state
!= bp_enabled
)
1113 /* FIXME drow/2003-10-07: This code should be pushed elsewhere when
1114 hardware watchpoints are split into multiple loc breakpoints. */
1115 if ((b
->loc_type
== bp_loc_hardware_watchpoint
1116 || b
->owner
->type
== bp_watchpoint
) && !b
->owner
->val
)
1119 val
= evaluate_expression (b
->owner
->exp
);
1120 release_value (val
);
1121 if (VALUE_LAZY (val
))
1122 value_fetch_lazy (val
);
1123 b
->owner
->val
= val
;
1126 val
= insert_bp_location (b
, tmp_error_stream
,
1127 &disabled_breaks
, &process_warning
,
1128 &hw_breakpoint_error
);
1135 /* If a hardware breakpoint or watchpoint was inserted, add a
1136 message about possibly exhausted resources. */
1137 if (hw_breakpoint_error
)
1139 fprintf_unfiltered (tmp_error_stream
,
1140 "Could not insert hardware breakpoints:\n\
1141 You may have requested too many hardware breakpoints/watchpoints.\n");
1143 #ifdef ONE_PROCESS_WRITETEXT
1144 if (process_warning
)
1145 fprintf_unfiltered (tmp_error_stream
,
1146 "The same program may be running in another process.");
1148 target_terminal_ours_for_output ();
1149 error_stream (tmp_error_stream
);
1155 remove_breakpoints (void)
1157 struct bp_location
*b
;
1160 ALL_BP_LOCATIONS (b
)
1164 val
= remove_breakpoint (b
, mark_uninserted
);
1173 remove_hw_watchpoints (void)
1175 struct bp_location
*b
;
1178 ALL_BP_LOCATIONS (b
)
1180 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1182 val
= remove_breakpoint (b
, mark_uninserted
);
1191 reattach_breakpoints (int pid
)
1193 struct bp_location
*b
;
1195 struct cleanup
*old_chain
= save_inferior_ptid ();
1197 /* Set inferior_ptid; remove_breakpoint uses this global. */
1198 inferior_ptid
= pid_to_ptid (pid
);
1199 ALL_BP_LOCATIONS (b
)
1203 remove_breakpoint (b
, mark_inserted
);
1204 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1205 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1207 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1208 /* FIXME drow/2003-10-07: This doesn't handle any other kinds of
1209 breakpoints. It's wrong for watchpoints, for example. */
1212 do_cleanups (old_chain
);
1217 do_cleanups (old_chain
);
1222 update_breakpoints_after_exec (void)
1224 struct breakpoint
*b
;
1225 struct breakpoint
*temp
;
1227 /* Doing this first prevents the badness of having delete_breakpoint()
1228 write a breakpoint's current "shadow contents" to lift the bp. That
1229 shadow is NOT valid after an exec()! */
1230 mark_breakpoints_out ();
1232 ALL_BREAKPOINTS_SAFE (b
, temp
)
1234 /* Solib breakpoints must be explicitly reset after an exec(). */
1235 if (b
->type
== bp_shlib_event
)
1237 delete_breakpoint (b
);
1241 /* Thread event breakpoints must be set anew after an exec(),
1242 as must overlay event breakpoints. */
1243 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1245 delete_breakpoint (b
);
1249 /* Step-resume breakpoints are meaningless after an exec(). */
1250 if (b
->type
== bp_step_resume
)
1252 delete_breakpoint (b
);
1256 /* Ditto the sigtramp handler breakpoints. */
1257 if (b
->type
== bp_through_sigtramp
)
1259 delete_breakpoint (b
);
1263 /* Ditto the exception-handling catchpoints. */
1264 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1266 delete_breakpoint (b
);
1270 /* Don't delete an exec catchpoint, because else the inferior
1271 won't stop when it ought!
1273 Similarly, we probably ought to keep vfork catchpoints, 'cause
1274 on this target, we may not be able to stop when the vfork is
1275 seen, but only when the subsequent exec is seen. (And because
1276 deleting fork catchpoints here but not vfork catchpoints will
1277 seem mysterious to users, keep those too.)
1279 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1280 target address field, if any, is sufficient to have it be reset
1281 automagically. Certainly on HP-UX that's true.
1283 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1284 valid code address on some platforms (like the mn10300
1285 simulators). We shouldn't assign any special interpretation to
1286 a breakpoint with a zero address. And in fact, GDB doesn't ---
1287 I can't see what that comment above is talking about. As far
1288 as I can tell, setting the address of a
1289 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1290 is meaningless, since those are implemented with HP-UX kernel
1291 hackery, not by storing breakpoint instructions somewhere. */
1292 if ((b
->type
== bp_catch_exec
) ||
1293 (b
->type
== bp_catch_vfork
) ||
1294 (b
->type
== bp_catch_fork
))
1296 b
->loc
->address
= (CORE_ADDR
) NULL
;
1300 /* bp_finish is a special case. The only way we ought to be able
1301 to see one of these when an exec() has happened, is if the user
1302 caught a vfork, and then said "finish". Ordinarily a finish just
1303 carries them to the call-site of the current callee, by setting
1304 a temporary bp there and resuming. But in this case, the finish
1305 will carry them entirely through the vfork & exec.
1307 We don't want to allow a bp_finish to remain inserted now. But
1308 we can't safely delete it, 'cause finish_command has a handle to
1309 the bp on a bpstat, and will later want to delete it. There's a
1310 chance (and I've seen it happen) that if we delete the bp_finish
1311 here, that its storage will get reused by the time finish_command
1312 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1313 We really must allow finish_command to delete a bp_finish.
1315 In the absense of a general solution for the "how do we know
1316 it's safe to delete something others may have handles to?"
1317 problem, what we'll do here is just uninsert the bp_finish, and
1318 let finish_command delete it.
1320 (We know the bp_finish is "doomed" in the sense that it's
1321 momentary, and will be deleted as soon as finish_command sees
1322 the inferior stopped. So it doesn't matter that the bp's
1323 address is probably bogus in the new a.out, unlike e.g., the
1324 solib breakpoints.) */
1326 if (b
->type
== bp_finish
)
1331 /* Without a symbolic address, we have little hope of the
1332 pre-exec() address meaning the same thing in the post-exec()
1334 if (b
->addr_string
== NULL
)
1336 delete_breakpoint (b
);
1340 /* If this breakpoint has survived the above battery of checks, then
1341 it must have a symbolic address. Be sure that it gets reevaluated
1342 to a target address, rather than reusing the old evaluation.
1344 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1345 for bp_catch_exec and friends, I'm pretty sure this is entirely
1346 unnecessary. A call to breakpoint_re_set_one always recomputes
1347 the breakpoint's address from scratch, or deletes it if it can't.
1348 So I think this assignment could be deleted without effect. */
1349 b
->loc
->address
= (CORE_ADDR
) NULL
;
1351 /* FIXME what about longjmp breakpoints? Re-create them here? */
1352 create_overlay_event_breakpoint ("_ovly_debug_event");
1356 detach_breakpoints (int pid
)
1358 struct bp_location
*b
;
1360 struct cleanup
*old_chain
= save_inferior_ptid ();
1362 if (pid
== PIDGET (inferior_ptid
))
1363 error ("Cannot detach breakpoints of inferior_ptid");
1365 /* Set inferior_ptid; remove_breakpoint uses this global. */
1366 inferior_ptid
= pid_to_ptid (pid
);
1367 ALL_BP_LOCATIONS (b
)
1371 val
= remove_breakpoint (b
, mark_inserted
);
1374 do_cleanups (old_chain
);
1379 do_cleanups (old_chain
);
1384 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1388 if (b
->owner
->enable_state
== bp_permanent
)
1389 /* Permanent breakpoints cannot be inserted or removed. */
1392 if (b
->owner
->type
== bp_none
)
1393 warning ("attempted to remove apparently deleted breakpoint #%d?",
1396 if (b
->loc_type
== bp_loc_software_breakpoint
1397 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1399 /* "Normal" instruction breakpoint: either the standard
1400 trap-instruction bp (bp_breakpoint), or a
1401 bp_hardware_breakpoint. */
1403 /* First check to see if we have to handle an overlay. */
1404 if (overlay_debugging
== ovly_off
1405 || b
->section
== NULL
1406 || !(section_is_overlay (b
->section
)))
1408 /* No overlay handling: just remove the breakpoint. */
1410 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1411 val
= target_remove_hw_breakpoint (b
->address
,
1412 b
->shadow_contents
);
1414 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1418 /* This breakpoint is in an overlay section.
1419 Did we set a breakpoint at the LMA? */
1420 if (!overlay_events_enabled
)
1422 /* Yes -- overlay event support is not active, so we
1423 should have set a breakpoint at the LMA. Remove it.
1425 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1427 /* Ignore any failures: if the LMA is in ROM, we will
1428 have already warned when we failed to insert it. */
1429 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1430 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1432 target_remove_breakpoint (addr
, b
->shadow_contents
);
1434 /* Did we set a breakpoint at the VMA?
1435 If so, we will have marked the breakpoint 'inserted'. */
1438 /* Yes -- remove it. Previously we did not bother to
1439 remove the breakpoint if the section had been
1440 unmapped, but let's not rely on that being safe. We
1441 don't know what the overlay manager might do. */
1442 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1443 val
= target_remove_hw_breakpoint (b
->address
,
1444 b
->shadow_contents
);
1446 val
= target_remove_breakpoint (b
->address
,
1447 b
->shadow_contents
);
1451 /* No -- not inserted, so no need to remove. No error. */
1457 b
->inserted
= (is
== mark_inserted
);
1459 else if (b
->loc_type
== bp_loc_hardware_watchpoint
1460 && b
->owner
->enable_state
== bp_enabled
1466 b
->inserted
= (is
== mark_inserted
);
1467 /* Walk down the saved value chain. */
1468 for (v
= b
->owner
->val_chain
; v
; v
= v
->next
)
1470 /* For each memory reference remove the watchpoint
1472 if (VALUE_LVAL (v
) == lval_memory
1473 && ! VALUE_LAZY (v
))
1475 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
1477 if (v
== b
->owner
->val_chain
1478 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1479 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1484 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1485 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1487 if (b
->owner
->type
== bp_read_watchpoint
)
1489 else if (b
->owner
->type
== bp_access_watchpoint
)
1492 val
= target_remove_watchpoint (addr
, len
, type
);
1499 /* Failure to remove any of the hardware watchpoints comes here. */
1500 if ((is
== mark_uninserted
) && (b
->inserted
))
1501 warning ("Could not remove hardware watchpoint %d.",
1504 /* Free the saved value chain. We will construct a new one
1505 the next time the watchpoint is inserted. */
1506 for (v
= b
->owner
->val_chain
; v
; v
= n
)
1511 b
->owner
->val_chain
= NULL
;
1513 else if ((b
->owner
->type
== bp_catch_fork
||
1514 b
->owner
->type
== bp_catch_vfork
||
1515 b
->owner
->type
== bp_catch_exec
)
1516 && b
->owner
->enable_state
== bp_enabled
1520 switch (b
->owner
->type
)
1523 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1525 case bp_catch_vfork
:
1526 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1529 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1532 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1537 b
->inserted
= (is
== mark_inserted
);
1539 else if ((b
->owner
->type
== bp_catch_catch
||
1540 b
->owner
->type
== bp_catch_throw
)
1541 && b
->owner
->enable_state
== bp_enabled
1545 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1548 b
->inserted
= (is
== mark_inserted
);
1550 else if (ep_is_exception_catchpoint (b
->owner
)
1551 && b
->inserted
/* sometimes previous insert doesn't happen */
1552 && b
->owner
->enable_state
== bp_enabled
1556 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1560 b
->inserted
= (is
== mark_inserted
);
1566 /* Clear the "inserted" flag in all breakpoints. */
1569 mark_breakpoints_out (void)
1571 struct bp_location
*bpt
;
1573 ALL_BP_LOCATIONS (bpt
)
1577 /* Clear the "inserted" flag in all breakpoints and delete any
1578 breakpoints which should go away between runs of the program.
1580 Plus other such housekeeping that has to be done for breakpoints
1583 Note: this function gets called at the end of a run (by
1584 generic_mourn_inferior) and when a run begins (by
1585 init_wait_for_inferior). */
1590 breakpoint_init_inferior (enum inf_context context
)
1592 struct breakpoint
*b
, *temp
;
1593 struct bp_location
*bpt
;
1594 static int warning_needed
= 0;
1596 ALL_BP_LOCATIONS (bpt
)
1599 ALL_BREAKPOINTS_SAFE (b
, temp
)
1604 case bp_watchpoint_scope
:
1606 /* If the call dummy breakpoint is at the entry point it will
1607 cause problems when the inferior is rerun, so we better
1610 Also get rid of scope breakpoints. */
1611 delete_breakpoint (b
);
1615 case bp_hardware_watchpoint
:
1616 case bp_read_watchpoint
:
1617 case bp_access_watchpoint
:
1619 /* Likewise for watchpoints on local expressions. */
1620 if (b
->exp_valid_block
!= NULL
)
1621 delete_breakpoint (b
);
1622 if (context
== inf_starting
)
1624 /* Reset val field to force reread of starting value
1625 in insert_breakpoints. */
1627 value_free (b
->val
);
1632 /* Likewise for exception catchpoints in dynamic-linked
1633 executables where required */
1634 if (ep_is_exception_catchpoint (b
) &&
1635 exception_catchpoints_are_fragile
)
1638 delete_breakpoint (b
);
1644 if (exception_catchpoints_are_fragile
)
1645 exception_support_initialized
= 0;
1647 /* Don't issue the warning unless it's really needed... */
1648 if (warning_needed
&& (context
!= inf_exited
))
1650 warning ("Exception catchpoints from last run were deleted.");
1651 warning ("You must reinsert them explicitly.");
1656 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1657 exists at PC. It returns ordinary_breakpoint_here if it's an
1658 ordinary breakpoint, or permanent_breakpoint_here if it's a
1659 permanent breakpoint.
1660 - When continuing from a location with an ordinary breakpoint, we
1661 actually single step once before calling insert_breakpoints.
1662 - When continuing from a localion with a permanent breakpoint, we
1663 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1664 the target, to advance the PC past the breakpoint. */
1666 enum breakpoint_here
1667 breakpoint_here_p (CORE_ADDR pc
)
1669 struct bp_location
*bpt
;
1670 int any_breakpoint_here
= 0;
1672 ALL_BP_LOCATIONS (bpt
)
1674 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1675 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1678 if ((bpt
->owner
->enable_state
== bp_enabled
1679 || bpt
->owner
->enable_state
== bp_permanent
)
1680 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1682 if (overlay_debugging
1683 && section_is_overlay (bpt
->section
)
1684 && !section_is_mapped (bpt
->section
))
1685 continue; /* unmapped overlay -- can't be a match */
1686 else if (bpt
->owner
->enable_state
== bp_permanent
)
1687 return permanent_breakpoint_here
;
1689 any_breakpoint_here
= 1;
1693 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1697 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1698 but it only returns true if there is actually a breakpoint inserted
1702 breakpoint_inserted_here_p (CORE_ADDR pc
)
1704 struct bp_location
*bpt
;
1706 ALL_BP_LOCATIONS (bpt
)
1708 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1709 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1713 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1715 if (overlay_debugging
1716 && section_is_overlay (bpt
->section
)
1717 && !section_is_mapped (bpt
->section
))
1718 continue; /* unmapped overlay -- can't be a match */
1727 /* Return nonzero if FRAME is a dummy frame. We can't use
1728 DEPRECATED_PC_IN_CALL_DUMMY because figuring out the saved SP would
1729 take too much time, at least using frame_register() on the 68k.
1730 This means that for this function to work right a port must use the
1731 bp_call_dummy breakpoint. */
1734 deprecated_frame_in_dummy (struct frame_info
*frame
)
1736 struct breakpoint
*b
;
1738 /* This function is used by two files: get_frame_type(), after first
1739 checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and
1740 sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */
1741 gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES
);
1745 if (b
->type
== bp_call_dummy
1746 && frame_id_eq (b
->frame_id
, get_frame_id (frame
))
1747 /* We need to check the PC as well as the frame on the sparc,
1748 for signals.exp in the testsuite. */
1749 && (get_frame_pc (frame
)
1751 - DEPRECATED_SIZEOF_CALL_DUMMY_WORDS
/ sizeof (LONGEST
) * DEPRECATED_REGISTER_SIZE
))
1752 && get_frame_pc (frame
) <= b
->loc
->address
)
1758 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1759 PC is valid for process/thread PTID. */
1762 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1764 struct bp_location
*bpt
;
1767 thread
= pid_to_thread_id (ptid
);
1769 ALL_BP_LOCATIONS (bpt
)
1771 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1772 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1775 if ((bpt
->owner
->enable_state
== bp_enabled
1776 || bpt
->owner
->enable_state
== bp_permanent
)
1777 && bpt
->address
== pc
1778 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1780 if (overlay_debugging
1781 && section_is_overlay (bpt
->section
)
1782 && !section_is_mapped (bpt
->section
))
1783 continue; /* unmapped overlay -- can't be a match */
1793 /* bpstat stuff. External routines' interfaces are documented
1797 ep_is_catchpoint (struct breakpoint
*ep
)
1800 (ep
->type
== bp_catch_load
)
1801 || (ep
->type
== bp_catch_unload
)
1802 || (ep
->type
== bp_catch_fork
)
1803 || (ep
->type
== bp_catch_vfork
)
1804 || (ep
->type
== bp_catch_exec
)
1805 || (ep
->type
== bp_catch_catch
)
1806 || (ep
->type
== bp_catch_throw
);
1808 /* ??rehrauer: Add more kinds here, as are implemented... */
1812 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1815 (ep
->type
== bp_catch_load
)
1816 || (ep
->type
== bp_catch_unload
);
1820 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1823 (ep
->type
== bp_catch_catch
)
1824 || (ep
->type
== bp_catch_throw
);
1827 /* Clear a bpstat so that it says we are not at any breakpoint.
1828 Also free any storage that is part of a bpstat. */
1831 bpstat_clear (bpstat
*bsp
)
1842 if (p
->old_val
!= NULL
)
1843 value_free (p
->old_val
);
1844 free_command_lines (&p
->commands
);
1851 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1852 is part of the bpstat is copied as well. */
1855 bpstat_copy (bpstat bs
)
1859 bpstat retval
= NULL
;
1864 for (; bs
!= NULL
; bs
= bs
->next
)
1866 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1867 memcpy (tmp
, bs
, sizeof (*tmp
));
1868 if (bs
->commands
!= NULL
)
1869 tmp
->commands
= copy_command_lines (bs
->commands
);
1870 if (bs
->old_val
!= NULL
)
1871 tmp
->old_val
= value_copy (bs
->old_val
);
1874 /* This is the first thing in the chain. */
1884 /* Find the bpstat associated with this breakpoint */
1887 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1892 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1894 if (bsp
->breakpoint_at
== breakpoint
)
1900 /* Find a step_resume breakpoint associated with this bpstat.
1901 (If there are multiple step_resume bp's on the list, this function
1902 will arbitrarily pick one.)
1904 It is an error to use this function if BPSTAT doesn't contain a
1905 step_resume breakpoint.
1907 See wait_for_inferior's use of this function. */
1909 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1914 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1916 current_thread
= pid_to_thread_id (inferior_ptid
);
1918 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1920 if ((bsp
->breakpoint_at
!= NULL
) &&
1921 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1922 (bsp
->breakpoint_at
->thread
== current_thread
||
1923 bsp
->breakpoint_at
->thread
== -1))
1924 return bsp
->breakpoint_at
;
1927 error ("Internal error (no step_resume breakpoint found)");
1931 /* Return the breakpoint number of the first breakpoint we are stopped
1932 at. *BSP upon return is a bpstat which points to the remaining
1933 breakpoints stopped at (but which is not guaranteed to be good for
1934 anything but further calls to bpstat_num).
1935 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1938 bpstat_num (bpstat
*bsp
)
1940 struct breakpoint
*b
;
1943 return 0; /* No more breakpoint values */
1946 b
= (*bsp
)->breakpoint_at
;
1947 *bsp
= (*bsp
)->next
;
1949 return -1; /* breakpoint that's been deleted since */
1951 return b
->number
; /* We have its number */
1955 /* Modify BS so that the actions will not be performed. */
1958 bpstat_clear_actions (bpstat bs
)
1960 for (; bs
!= NULL
; bs
= bs
->next
)
1962 free_command_lines (&bs
->commands
);
1963 if (bs
->old_val
!= NULL
)
1965 value_free (bs
->old_val
);
1971 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1973 cleanup_executing_breakpoints (void *ignore
)
1975 executing_breakpoint_commands
= 0;
1978 /* Execute all the commands associated with all the breakpoints at this
1979 location. Any of these commands could cause the process to proceed
1980 beyond this point, etc. We look out for such changes by checking
1981 the global "breakpoint_proceeded" after each command. */
1984 bpstat_do_actions (bpstat
*bsp
)
1987 struct cleanup
*old_chain
;
1988 struct command_line
*cmd
;
1990 /* Avoid endless recursion if a `source' command is contained
1992 if (executing_breakpoint_commands
)
1995 executing_breakpoint_commands
= 1;
1996 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
1999 /* Note that (as of this writing), our callers all appear to
2000 be passing us the address of global stop_bpstat. And, if
2001 our calls to execute_control_command cause the inferior to
2002 proceed, that global (and hence, *bsp) will change.
2004 We must be careful to not touch *bsp unless the inferior
2005 has not proceeded. */
2007 /* This pointer will iterate over the list of bpstat's. */
2010 breakpoint_proceeded
= 0;
2011 for (; bs
!= NULL
; bs
= bs
->next
)
2016 execute_control_command (cmd
);
2018 if (breakpoint_proceeded
)
2023 if (breakpoint_proceeded
)
2024 /* The inferior is proceeded by the command; bomb out now.
2025 The bpstat chain has been blown away by wait_for_inferior.
2026 But since execution has stopped again, there is a new bpstat
2027 to look at, so start over. */
2030 free_command_lines (&bs
->commands
);
2032 do_cleanups (old_chain
);
2035 /* This is the normal print function for a bpstat. In the future,
2036 much of this logic could (should?) be moved to bpstat_stop_status,
2037 by having it set different print_it values.
2039 Current scheme: When we stop, bpstat_print() is called. It loops
2040 through the bpstat list of things causing this stop, calling the
2041 print_bp_stop_message function on each one. The behavior of the
2042 print_bp_stop_message function depends on the print_it field of
2043 bpstat. If such field so indicates, call this function here.
2045 Return values from this routine (ultimately used by bpstat_print()
2046 and normal_stop() to decide what to do):
2047 PRINT_NOTHING: Means we already printed all we needed to print,
2048 don't print anything else.
2049 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2050 that something to be followed by a location.
2051 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2052 that something to be followed by a location.
2053 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2056 static enum print_stop_action
2057 print_it_typical (bpstat bs
)
2059 struct cleanup
*old_chain
, *ui_out_chain
;
2060 struct ui_stream
*stb
;
2061 stb
= ui_out_stream_new (uiout
);
2062 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2063 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2064 which has since been deleted. */
2065 if (bs
->breakpoint_at
== NULL
)
2066 return PRINT_UNKNOWN
;
2068 switch (bs
->breakpoint_at
->type
)
2071 case bp_hardware_breakpoint
:
2072 if (bs
->breakpoint_at
->loc
->address
!= bs
->breakpoint_at
->loc
->requested_address
)
2073 breakpoint_adjustment_warning (bs
->breakpoint_at
->loc
->requested_address
,
2074 bs
->breakpoint_at
->loc
->address
,
2075 bs
->breakpoint_at
->number
, 1);
2076 annotate_breakpoint (bs
->breakpoint_at
->number
);
2077 ui_out_text (uiout
, "\nBreakpoint ");
2078 if (ui_out_is_mi_like_p (uiout
))
2079 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2080 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2081 ui_out_text (uiout
, ", ");
2082 return PRINT_SRC_AND_LOC
;
2085 case bp_shlib_event
:
2086 /* Did we stop because the user set the stop_on_solib_events
2087 variable? (If so, we report this as a generic, "Stopped due
2088 to shlib event" message.) */
2089 printf_filtered ("Stopped due to shared library event\n");
2090 return PRINT_NOTHING
;
2093 case bp_thread_event
:
2094 /* Not sure how we will get here.
2095 GDB should not stop for these breakpoints. */
2096 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2097 return PRINT_NOTHING
;
2100 case bp_overlay_event
:
2101 /* By analogy with the thread event, GDB should not stop for these. */
2102 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2103 return PRINT_NOTHING
;
2107 annotate_catchpoint (bs
->breakpoint_at
->number
);
2108 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2109 printf_filtered ("loaded");
2110 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2111 return PRINT_SRC_AND_LOC
;
2114 case bp_catch_unload
:
2115 annotate_catchpoint (bs
->breakpoint_at
->number
);
2116 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2117 printf_filtered ("unloaded");
2118 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2119 return PRINT_SRC_AND_LOC
;
2123 annotate_catchpoint (bs
->breakpoint_at
->number
);
2124 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2125 printf_filtered ("forked");
2126 printf_filtered (" process %d), ",
2127 bs
->breakpoint_at
->forked_inferior_pid
);
2128 return PRINT_SRC_AND_LOC
;
2131 case bp_catch_vfork
:
2132 annotate_catchpoint (bs
->breakpoint_at
->number
);
2133 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2134 printf_filtered ("vforked");
2135 printf_filtered (" process %d), ",
2136 bs
->breakpoint_at
->forked_inferior_pid
);
2137 return PRINT_SRC_AND_LOC
;
2141 annotate_catchpoint (bs
->breakpoint_at
->number
);
2142 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2143 bs
->breakpoint_at
->number
,
2144 bs
->breakpoint_at
->exec_pathname
);
2145 return PRINT_SRC_AND_LOC
;
2148 case bp_catch_catch
:
2149 if (current_exception_event
&&
2150 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2152 annotate_catchpoint (bs
->breakpoint_at
->number
);
2153 printf_filtered ("\nCatchpoint %d (exception caught), ",
2154 bs
->breakpoint_at
->number
);
2155 printf_filtered ("throw location ");
2156 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2157 printf_filtered ("%s:%d",
2158 CURRENT_EXCEPTION_THROW_FILE
,
2159 CURRENT_EXCEPTION_THROW_LINE
);
2161 printf_filtered ("unknown");
2163 printf_filtered (", catch location ");
2164 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2165 printf_filtered ("%s:%d",
2166 CURRENT_EXCEPTION_CATCH_FILE
,
2167 CURRENT_EXCEPTION_CATCH_LINE
);
2169 printf_filtered ("unknown");
2171 printf_filtered ("\n");
2172 /* don't bother to print location frame info */
2173 return PRINT_SRC_ONLY
;
2177 /* really throw, some other bpstat will handle it */
2178 return PRINT_UNKNOWN
;
2182 case bp_catch_throw
:
2183 if (current_exception_event
&&
2184 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2186 annotate_catchpoint (bs
->breakpoint_at
->number
);
2187 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2188 bs
->breakpoint_at
->number
);
2189 printf_filtered ("throw location ");
2190 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2191 printf_filtered ("%s:%d",
2192 CURRENT_EXCEPTION_THROW_FILE
,
2193 CURRENT_EXCEPTION_THROW_LINE
);
2195 printf_filtered ("unknown");
2197 printf_filtered (", catch location ");
2198 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2199 printf_filtered ("%s:%d",
2200 CURRENT_EXCEPTION_CATCH_FILE
,
2201 CURRENT_EXCEPTION_CATCH_LINE
);
2203 printf_filtered ("unknown");
2205 printf_filtered ("\n");
2206 /* don't bother to print location frame info */
2207 return PRINT_SRC_ONLY
;
2211 /* really catch, some other bpstat will handle it */
2212 return PRINT_UNKNOWN
;
2217 case bp_hardware_watchpoint
:
2218 if (bs
->old_val
!= NULL
)
2220 annotate_watchpoint (bs
->breakpoint_at
->number
);
2221 if (ui_out_is_mi_like_p (uiout
))
2222 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2223 mention (bs
->breakpoint_at
);
2224 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2225 ui_out_text (uiout
, "\nOld value = ");
2226 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2227 ui_out_field_stream (uiout
, "old", stb
);
2228 ui_out_text (uiout
, "\nNew value = ");
2229 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2230 ui_out_field_stream (uiout
, "new", stb
);
2231 do_cleanups (ui_out_chain
);
2232 ui_out_text (uiout
, "\n");
2233 value_free (bs
->old_val
);
2236 /* More than one watchpoint may have been triggered. */
2237 return PRINT_UNKNOWN
;
2240 case bp_read_watchpoint
:
2241 if (ui_out_is_mi_like_p (uiout
))
2242 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2243 mention (bs
->breakpoint_at
);
2244 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2245 ui_out_text (uiout
, "\nValue = ");
2246 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2247 ui_out_field_stream (uiout
, "value", stb
);
2248 do_cleanups (ui_out_chain
);
2249 ui_out_text (uiout
, "\n");
2250 return PRINT_UNKNOWN
;
2253 case bp_access_watchpoint
:
2254 if (bs
->old_val
!= NULL
)
2256 annotate_watchpoint (bs
->breakpoint_at
->number
);
2257 if (ui_out_is_mi_like_p (uiout
))
2258 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2259 mention (bs
->breakpoint_at
);
2260 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2261 ui_out_text (uiout
, "\nOld value = ");
2262 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2263 ui_out_field_stream (uiout
, "old", stb
);
2264 value_free (bs
->old_val
);
2266 ui_out_text (uiout
, "\nNew value = ");
2270 mention (bs
->breakpoint_at
);
2271 if (ui_out_is_mi_like_p (uiout
))
2272 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2273 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2274 ui_out_text (uiout
, "\nValue = ");
2276 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2277 ui_out_field_stream (uiout
, "new", stb
);
2278 do_cleanups (ui_out_chain
);
2279 ui_out_text (uiout
, "\n");
2280 return PRINT_UNKNOWN
;
2283 /* Fall through, we don't deal with these types of breakpoints
2287 if (ui_out_is_mi_like_p (uiout
))
2288 ui_out_field_string (uiout
, "reason", "function-finished");
2289 return PRINT_UNKNOWN
;
2293 if (ui_out_is_mi_like_p (uiout
))
2294 ui_out_field_string (uiout
, "reason", "location-reached");
2295 return PRINT_UNKNOWN
;
2300 case bp_longjmp_resume
:
2301 case bp_step_resume
:
2302 case bp_through_sigtramp
:
2303 case bp_watchpoint_scope
:
2306 return PRINT_UNKNOWN
;
2310 /* Generic routine for printing messages indicating why we
2311 stopped. The behavior of this function depends on the value
2312 'print_it' in the bpstat structure. Under some circumstances we
2313 may decide not to print anything here and delegate the task to
2316 static enum print_stop_action
2317 print_bp_stop_message (bpstat bs
)
2319 switch (bs
->print_it
)
2322 /* Nothing should be printed for this bpstat entry. */
2323 return PRINT_UNKNOWN
;
2327 /* We still want to print the frame, but we already printed the
2328 relevant messages. */
2329 return PRINT_SRC_AND_LOC
;
2332 case print_it_normal
:
2333 /* Normal case. Call the breakpoint's print_it method, or
2334 print_it_typical. */
2335 if (bs
->breakpoint_at
!= NULL
&& bs
->breakpoint_at
->ops
!= NULL
2336 && bs
->breakpoint_at
->ops
->print_it
!= NULL
)
2337 return bs
->breakpoint_at
->ops
->print_it (bs
->breakpoint_at
);
2339 return print_it_typical (bs
);
2343 internal_error (__FILE__
, __LINE__
,
2344 "print_bp_stop_message: unrecognized enum value");
2349 /* Print a message indicating what happened. This is called from
2350 normal_stop(). The input to this routine is the head of the bpstat
2351 list - a list of the eventpoints that caused this stop. This
2352 routine calls the generic print routine for printing a message
2353 about reasons for stopping. This will print (for example) the
2354 "Breakpoint n," part of the output. The return value of this
2357 PRINT_UNKNOWN: Means we printed nothing
2358 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2359 code to print the location. An example is
2360 "Breakpoint 1, " which should be followed by
2362 PRINT_SRC_ONLY: Means we printed something, but there is no need
2363 to also print the location part of the message.
2364 An example is the catch/throw messages, which
2365 don't require a location appended to the end.
2366 PRINT_NOTHING: We have done some printing and we don't need any
2367 further info to be printed.*/
2369 enum print_stop_action
2370 bpstat_print (bpstat bs
)
2374 /* Maybe another breakpoint in the chain caused us to stop.
2375 (Currently all watchpoints go on the bpstat whether hit or not.
2376 That probably could (should) be changed, provided care is taken
2377 with respect to bpstat_explains_signal). */
2378 for (; bs
; bs
= bs
->next
)
2380 val
= print_bp_stop_message (bs
);
2381 if (val
== PRINT_SRC_ONLY
2382 || val
== PRINT_SRC_AND_LOC
2383 || val
== PRINT_NOTHING
)
2387 /* We reached the end of the chain, or we got a null BS to start
2388 with and nothing was printed. */
2389 return PRINT_UNKNOWN
;
2392 /* Evaluate the expression EXP and return 1 if value is zero.
2393 This is used inside a catch_errors to evaluate the breakpoint condition.
2394 The argument is a "struct expression *" that has been cast to char * to
2395 make it pass through catch_errors. */
2398 breakpoint_cond_eval (void *exp
)
2400 struct value
*mark
= value_mark ();
2401 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2402 value_free_to_mark (mark
);
2406 /* Allocate a new bpstat and chain it to the current one. */
2409 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2413 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2415 bs
->breakpoint_at
= b
;
2416 /* If the condition is false, etc., don't do the commands. */
2417 bs
->commands
= NULL
;
2419 bs
->print_it
= print_it_normal
;
2423 /* Possible return values for watchpoint_check (this can't be an enum
2424 because of check_errors). */
2425 /* The watchpoint has been deleted. */
2426 #define WP_DELETED 1
2427 /* The value has changed. */
2428 #define WP_VALUE_CHANGED 2
2429 /* The value has not changed. */
2430 #define WP_VALUE_NOT_CHANGED 3
2432 #define BP_TEMPFLAG 1
2433 #define BP_HARDWAREFLAG 2
2435 /* Check watchpoint condition. */
2438 watchpoint_check (void *p
)
2440 bpstat bs
= (bpstat
) p
;
2441 struct breakpoint
*b
;
2442 struct frame_info
*fr
;
2443 int within_current_scope
;
2445 struct frame_id current_frame_id
;
2448 b
= bs
->breakpoint_at
;
2450 if (b
->exp_valid_block
== NULL
)
2451 within_current_scope
= 1;
2454 /* There is no current frame at this moment. If we're going to have
2455 any chance of handling watchpoints on local variables, we'll need
2456 the frame chain (so we can determine if we're in scope). */
2457 reinit_frame_cache ();
2458 fr
= frame_find_by_id (b
->watchpoint_frame
);
2459 within_current_scope
= (fr
!= NULL
);
2460 /* in_function_epilogue_p() returns a non-zero value if we're still
2461 in the function but the stack frame has already been invalidated.
2462 Since we can't rely on the values of local variables after the
2463 stack has been destroyed, we are treating the watchpoint in that
2464 state as `not changed' without further checking.
2466 vinschen/2003-09-04: The former implementation left out the case
2467 that the watchpoint frame couldn't be found by frame_find_by_id()
2468 because the current PC is currently in an epilogue. Calling
2469 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2470 if ((!within_current_scope
|| fr
== get_current_frame ())
2471 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2472 return WP_VALUE_NOT_CHANGED
;
2473 if (fr
&& within_current_scope
)
2474 /* If we end up stopping, the current frame will get selected
2475 in normal_stop. So this call to select_frame won't affect
2480 if (within_current_scope
)
2482 /* We use value_{,free_to_}mark because it could be a
2483 *long* time before we return to the command level and
2484 call free_all_values. We can't call free_all_values because
2485 we might be in the middle of evaluating a function call. */
2487 struct value
*mark
= value_mark ();
2488 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2489 if (!value_equal (b
->val
, new_val
))
2491 release_value (new_val
);
2492 value_free_to_mark (mark
);
2493 bs
->old_val
= b
->val
;
2495 /* We will stop here */
2496 return WP_VALUE_CHANGED
;
2500 /* Nothing changed, don't do anything. */
2501 value_free_to_mark (mark
);
2502 /* We won't stop here */
2503 return WP_VALUE_NOT_CHANGED
;
2508 /* This seems like the only logical thing to do because
2509 if we temporarily ignored the watchpoint, then when
2510 we reenter the block in which it is valid it contains
2511 garbage (in the case of a function, it may have two
2512 garbage values, one before and one after the prologue).
2513 So we can't even detect the first assignment to it and
2514 watch after that (since the garbage may or may not equal
2515 the first value assigned). */
2516 /* We print all the stop information in print_it_typical(), but
2517 in this case, by the time we call print_it_typical() this bp
2518 will be deleted already. So we have no choice but print the
2519 information here. */
2520 if (ui_out_is_mi_like_p (uiout
))
2521 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2522 ui_out_text (uiout
, "\nWatchpoint ");
2523 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2524 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2525 which its expression is valid.\n");
2527 if (b
->related_breakpoint
)
2528 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2529 b
->disposition
= disp_del_at_next_stop
;
2535 /* Get a bpstat associated with having just stopped at address *PC
2536 and frame address CORE_ADDRESS. Update *PC to point at the
2537 breakpoint (if we hit a breakpoint). NOT_A_SW_BREAKPOINT is nonzero
2538 if this is known to not be a real breakpoint (it could still be a
2539 watchpoint, though). */
2541 /* Determine whether we stopped at a breakpoint, etc, or whether we
2542 don't understand this stop. Result is a chain of bpstat's such that:
2544 if we don't understand the stop, the result is a null pointer.
2546 if we understand why we stopped, the result is not null.
2548 Each element of the chain refers to a particular breakpoint or
2549 watchpoint at which we have stopped. (We may have stopped for
2550 several reasons concurrently.)
2552 Each element of the chain has valid next, breakpoint_at,
2553 commands, FIXME??? fields. */
2556 bpstat_stop_status (CORE_ADDR
*pc
, int not_a_sw_breakpoint
)
2558 struct breakpoint
*b
, *temp
;
2560 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2561 int real_breakpoint
= 0;
2562 /* Root of the chain of bpstat's */
2563 struct bpstats root_bs
[1];
2564 /* Pointer to the last thing in the chain currently. */
2565 bpstat bs
= root_bs
;
2567 /* Get the address where the breakpoint would have been. The
2568 "not_a_sw_breakpoint" argument is meant to distinguish between a
2569 breakpoint trap event and a trace/singlestep trap event. For a
2570 trace/singlestep trap event, we would not want to subtract
2571 DECR_PC_AFTER_BREAK from the PC. */
2573 bp_addr
= *pc
- (not_a_sw_breakpoint
? 0 : DECR_PC_AFTER_BREAK
);
2575 ALL_BREAKPOINTS_SAFE (b
, temp
)
2577 if (b
->enable_state
== bp_disabled
2578 || b
->enable_state
== bp_shlib_disabled
2579 || b
->enable_state
== bp_call_disabled
)
2582 if (b
->type
!= bp_watchpoint
2583 && b
->type
!= bp_hardware_watchpoint
2584 && b
->type
!= bp_read_watchpoint
2585 && b
->type
!= bp_access_watchpoint
2586 && b
->type
!= bp_hardware_breakpoint
2587 && b
->type
!= bp_catch_fork
2588 && b
->type
!= bp_catch_vfork
2589 && b
->type
!= bp_catch_exec
2590 && b
->type
!= bp_catch_catch
2591 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2593 if (b
->loc
->address
!= bp_addr
) /* address doesn't match */
2595 if (overlay_debugging
/* unmapped overlay section */
2596 && section_is_overlay (b
->loc
->section
)
2597 && !section_is_mapped (b
->loc
->section
))
2601 if (b
->type
== bp_hardware_breakpoint
)
2603 if (b
->loc
->address
!= (*pc
- DECR_PC_AFTER_HW_BREAK
))
2605 if (overlay_debugging
/* unmapped overlay section */
2606 && section_is_overlay (b
->loc
->section
)
2607 && !section_is_mapped (b
->loc
->section
))
2611 /* Is this a catchpoint of a load or unload? If so, did we
2612 get a load or unload of the specified library? If not,
2614 if ((b
->type
== bp_catch_load
)
2615 #if defined(SOLIB_HAVE_LOAD_EVENT)
2616 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2617 || ((b
->dll_pathname
!= NULL
)
2618 && (strcmp (b
->dll_pathname
,
2619 SOLIB_LOADED_LIBRARY_PATHNAME (
2620 PIDGET (inferior_ptid
)))
2626 if ((b
->type
== bp_catch_unload
)
2627 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2628 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2629 || ((b
->dll_pathname
!= NULL
)
2630 && (strcmp (b
->dll_pathname
,
2631 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2632 PIDGET (inferior_ptid
)))
2638 if ((b
->type
== bp_catch_fork
)
2639 && !inferior_has_forked (PIDGET (inferior_ptid
),
2640 &b
->forked_inferior_pid
))
2643 if ((b
->type
== bp_catch_vfork
)
2644 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2645 &b
->forked_inferior_pid
))
2648 if ((b
->type
== bp_catch_exec
)
2649 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2652 if (ep_is_exception_catchpoint (b
) &&
2653 !(current_exception_event
= target_get_current_exception_event ()))
2656 /* Come here if it's a watchpoint, or if the break address matches */
2658 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2660 /* Watchpoints may change this, if not found to have triggered. */
2664 if (b
->type
== bp_watchpoint
||
2665 b
->type
== bp_hardware_watchpoint
)
2667 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2669 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2670 int e
= catch_errors (watchpoint_check
, bs
, message
,
2672 do_cleanups (cleanups
);
2676 /* We've already printed what needs to be printed. */
2677 /* Actually this is superfluous, because by the time we
2678 call print_it_typical() the wp will be already deleted,
2679 and the function will return immediately. */
2680 bs
->print_it
= print_it_done
;
2683 case WP_VALUE_CHANGED
:
2687 case WP_VALUE_NOT_CHANGED
:
2689 bs
->print_it
= print_it_noop
;
2696 /* Error from catch_errors. */
2697 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2698 if (b
->related_breakpoint
)
2699 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2700 b
->disposition
= disp_del_at_next_stop
;
2701 /* We've already printed what needs to be printed. */
2702 bs
->print_it
= print_it_done
;
2708 else if (b
->type
== bp_read_watchpoint
||
2709 b
->type
== bp_access_watchpoint
)
2715 addr
= target_stopped_data_address ();
2718 for (v
= b
->val_chain
; v
; v
= v
->next
)
2720 if (VALUE_LVAL (v
) == lval_memory
2721 && ! VALUE_LAZY (v
))
2723 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
2725 if (v
== b
->val_chain
2726 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2727 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2731 vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
2732 /* Exact match not required. Within range is
2734 if (addr
>= vaddr
&&
2735 addr
< vaddr
+ TYPE_LENGTH (VALUE_TYPE (v
)))
2742 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2744 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2745 int e
= catch_errors (watchpoint_check
, bs
, message
,
2747 do_cleanups (cleanups
);
2751 /* We've already printed what needs to be printed. */
2752 bs
->print_it
= print_it_done
;
2755 case WP_VALUE_CHANGED
:
2756 if (b
->type
== bp_read_watchpoint
)
2758 /* Don't stop: read watchpoints shouldn't fire if
2759 the value has changed. This is for targets
2760 which cannot set read-only watchpoints. */
2761 bs
->print_it
= print_it_noop
;
2767 case WP_VALUE_NOT_CHANGED
:
2774 /* Error from catch_errors. */
2775 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2776 if (b
->related_breakpoint
)
2777 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2778 b
->disposition
= disp_del_at_next_stop
;
2779 /* We've already printed what needs to be printed. */
2780 bs
->print_it
= print_it_done
;
2784 else /* found == 0 */
2786 /* This is a case where some watchpoint(s) triggered,
2787 but not at the address of this watchpoint (FOUND
2788 was left zero). So don't print anything for this
2790 bs
->print_it
= print_it_noop
;
2797 /* By definition, an encountered breakpoint is a triggered
2801 real_breakpoint
= 1;
2804 if (frame_id_p (b
->frame_id
)
2805 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2809 int value_is_zero
= 0;
2813 /* Need to select the frame, with all that implies
2814 so that the conditions will have the right context. */
2815 select_frame (get_current_frame ());
2817 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2818 "Error in testing breakpoint condition:\n",
2820 /* FIXME-someday, should give breakpoint # */
2823 if (b
->cond
&& value_is_zero
)
2826 /* Don't consider this a hit. */
2829 else if (b
->ignore_count
> 0)
2832 annotate_ignore_count_change ();
2837 /* We will stop here */
2838 if (b
->disposition
== disp_disable
)
2839 b
->enable_state
= bp_disabled
;
2842 bs
->commands
= b
->commands
;
2844 (strcmp ("silent", bs
->commands
->line
) == 0
2845 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
2847 bs
->commands
= bs
->commands
->next
;
2850 bs
->commands
= copy_command_lines (bs
->commands
);
2853 /* Print nothing for this entry if we dont stop or if we dont print. */
2854 if (bs
->stop
== 0 || bs
->print
== 0)
2855 bs
->print_it
= print_it_noop
;
2858 bs
->next
= NULL
; /* Terminate the chain */
2859 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2861 if (real_breakpoint
&& bs
)
2863 if (bs
->breakpoint_at
->type
== bp_hardware_breakpoint
)
2865 if (DECR_PC_AFTER_HW_BREAK
!= 0)
2867 *pc
= *pc
- DECR_PC_AFTER_HW_BREAK
;
2873 if (DECR_PC_AFTER_BREAK
!= 0 || must_shift_inst_regs
)
2876 #if defined (SHIFT_INST_REGS)
2878 #else /* No SHIFT_INST_REGS. */
2880 #endif /* No SHIFT_INST_REGS. */
2885 /* The value of a hardware watchpoint hasn't changed, but the
2886 intermediate memory locations we are watching may have. */
2887 if (bs
&& !bs
->stop
&&
2888 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2889 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2890 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2892 remove_breakpoints ();
2893 insert_breakpoints ();
2898 /* Tell what to do about this bpstat. */
2900 bpstat_what (bpstat bs
)
2902 /* Classify each bpstat as one of the following. */
2905 /* This bpstat element has no effect on the main_action. */
2908 /* There was a watchpoint, stop but don't print. */
2911 /* There was a watchpoint, stop and print. */
2914 /* There was a breakpoint but we're not stopping. */
2917 /* There was a breakpoint, stop but don't print. */
2920 /* There was a breakpoint, stop and print. */
2923 /* We hit the longjmp breakpoint. */
2926 /* We hit the longjmp_resume breakpoint. */
2929 /* We hit the step_resume breakpoint. */
2932 /* We hit the through_sigtramp breakpoint. */
2935 /* We hit the shared library event breakpoint. */
2938 /* We caught a shared library event. */
2941 /* This is just used to count how many enums there are. */
2945 /* Here is the table which drives this routine. So that we can
2946 format it pretty, we define some abbreviations for the
2947 enum bpstat_what codes. */
2948 #define kc BPSTAT_WHAT_KEEP_CHECKING
2949 #define ss BPSTAT_WHAT_STOP_SILENT
2950 #define sn BPSTAT_WHAT_STOP_NOISY
2951 #define sgl BPSTAT_WHAT_SINGLE
2952 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2953 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2954 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2955 #define sr BPSTAT_WHAT_STEP_RESUME
2956 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2957 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2958 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2960 /* "Can't happen." Might want to print an error message.
2961 abort() is not out of the question, but chances are GDB is just
2962 a bit confused, not unusable. */
2963 #define err BPSTAT_WHAT_STOP_NOISY
2965 /* Given an old action and a class, come up with a new action. */
2966 /* One interesting property of this table is that wp_silent is the same
2967 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2968 after stopping, the check for whether to step over a breakpoint
2969 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2970 reference to how we stopped. We retain separate wp_silent and
2971 bp_silent codes in case we want to change that someday.
2973 Another possibly interesting property of this table is that
2974 there's a partial ordering, priority-like, of the actions. Once
2975 you've decided that some action is appropriate, you'll never go
2976 back and decide something of a lower priority is better. The
2979 kc < clr sgl shl shlr slr sn sr ss ts
2980 sgl < clrs shl shlr slr sn sr ss ts
2981 slr < err shl shlr sn sr ss ts
2982 clr < clrs err shl shlr sn sr ss ts
2983 clrs < err shl shlr sn sr ss ts
2984 ss < shl shlr sn sr ts
2991 What I think this means is that we don't need a damned table
2992 here. If you just put the rows and columns in the right order,
2993 it'd look awfully regular. We could simply walk the bpstat list
2994 and choose the highest priority action we find, with a little
2995 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2996 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2997 is messy anyway). */
2999 /* step_resume entries: a step resume breakpoint overrides another
3000 breakpoint of signal handling (see comment in wait_for_inferior
3001 at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
3002 /* We handle the through_sigtramp_breakpoint the same way; having both
3003 one of those and a step_resume_breakpoint is probably very rare (?). */
3005 static const enum bpstat_what_main_action
3006 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3009 /* kc ss sn sgl slr clr clrs sr ts shl shlr
3012 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
3014 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3016 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3018 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
3020 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3022 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3024 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
3026 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
3028 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
3030 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
3032 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
3034 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
3049 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3050 struct bpstat_what retval
;
3052 retval
.call_dummy
= 0;
3053 for (; bs
!= NULL
; bs
= bs
->next
)
3055 enum class bs_class
= no_effect
;
3056 if (bs
->breakpoint_at
== NULL
)
3057 /* I suspect this can happen if it was a momentary breakpoint
3058 which has since been deleted. */
3060 switch (bs
->breakpoint_at
->type
)
3066 case bp_hardware_breakpoint
:
3072 bs_class
= bp_noisy
;
3074 bs_class
= bp_silent
;
3077 bs_class
= bp_nostop
;
3080 case bp_hardware_watchpoint
:
3081 case bp_read_watchpoint
:
3082 case bp_access_watchpoint
:
3086 bs_class
= wp_noisy
;
3088 bs_class
= wp_silent
;
3091 /* There was a watchpoint, but we're not stopping.
3092 This requires no further action. */
3093 bs_class
= no_effect
;
3096 bs_class
= long_jump
;
3098 case bp_longjmp_resume
:
3099 bs_class
= long_resume
;
3101 case bp_step_resume
:
3104 bs_class
= step_resume
;
3107 /* It is for the wrong frame. */
3108 bs_class
= bp_nostop
;
3110 case bp_through_sigtramp
:
3111 bs_class
= through_sig
;
3113 case bp_watchpoint_scope
:
3114 bs_class
= bp_nostop
;
3116 case bp_shlib_event
:
3117 bs_class
= shlib_event
;
3119 case bp_thread_event
:
3120 case bp_overlay_event
:
3121 bs_class
= bp_nostop
;
3124 case bp_catch_unload
:
3125 /* Only if this catchpoint triggered should we cause the
3126 step-out-of-dld behaviour. Otherwise, we ignore this
3129 bs_class
= catch_shlib_event
;
3131 bs_class
= no_effect
;
3134 case bp_catch_vfork
:
3139 bs_class
= bp_noisy
;
3141 bs_class
= bp_silent
;
3144 /* There was a catchpoint, but we're not stopping.
3145 This requires no further action. */
3146 bs_class
= no_effect
;
3148 case bp_catch_catch
:
3149 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3150 bs_class
= bp_nostop
;
3152 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3154 case bp_catch_throw
:
3155 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3156 bs_class
= bp_nostop
;
3158 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3161 /* Make sure the action is stop (silent or noisy),
3162 so infrun.c pops the dummy frame. */
3163 bs_class
= bp_silent
;
3164 retval
.call_dummy
= 1;
3167 current_action
= table
[(int) bs_class
][(int) current_action
];
3169 retval
.main_action
= current_action
;
3173 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3174 without hardware support). This isn't related to a specific bpstat,
3175 just to things like whether watchpoints are set. */
3178 bpstat_should_step (void)
3180 struct breakpoint
*b
;
3182 if (b
->enable_state
== bp_enabled
&& b
->type
== bp_watchpoint
)
3187 /* Nonzero if there are enabled hardware watchpoints. */
3189 bpstat_have_active_hw_watchpoints (void)
3191 struct bp_location
*bpt
;
3192 ALL_BP_LOCATIONS (bpt
)
3193 if ((bpt
->owner
->enable_state
== bp_enabled
)
3195 && bpt
->loc_type
== bp_loc_hardware_watchpoint
)
3201 /* Given a bpstat that records zero or more triggered eventpoints, this
3202 function returns another bpstat which contains only the catchpoints
3203 on that first list, if any. */
3205 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3207 struct bpstats root_bs
[1];
3208 bpstat bs
= root_bs
;
3209 struct breakpoint
*ep
;
3212 bpstat_clear (cp_list
);
3213 root_bs
->next
= NULL
;
3215 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3217 /* Is this eventpoint a catchpoint? If not, ignore it. */
3218 ep
= ep_list
->breakpoint_at
;
3221 if ((ep
->type
!= bp_catch_load
) &&
3222 (ep
->type
!= bp_catch_unload
) &&
3223 (ep
->type
!= bp_catch_catch
) &&
3224 (ep
->type
!= bp_catch_throw
))
3225 /* pai: (temp) ADD fork/vfork here!! */
3228 /* Yes; add it to the list. */
3229 bs
= bpstat_alloc (ep
, bs
);
3234 #if defined(SOLIB_ADD)
3235 /* Also, for each triggered catchpoint, tag it with the name of
3236 the library that caused this trigger. (We copy the name now,
3237 because it's only guaranteed to be available NOW, when the
3238 catchpoint triggers. Clients who may wish to know the name
3239 later must get it from the catchpoint itself.) */
3240 if (ep
->triggered_dll_pathname
!= NULL
)
3241 xfree (ep
->triggered_dll_pathname
);
3242 if (ep
->type
== bp_catch_load
)
3243 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3244 PIDGET (inferior_ptid
));
3246 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3247 PIDGET (inferior_ptid
));
3249 dll_pathname
= NULL
;
3253 ep
->triggered_dll_pathname
= (char *)
3254 xmalloc (strlen (dll_pathname
) + 1);
3255 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3258 ep
->triggered_dll_pathname
= NULL
;
3264 /* Print B to gdb_stdout. */
3266 print_one_breakpoint (struct breakpoint
*b
,
3267 CORE_ADDR
*last_addr
)
3269 struct command_line
*l
;
3271 struct ep_type_description
3276 static struct ep_type_description bptypes
[] =
3278 {bp_none
, "?deleted?"},
3279 {bp_breakpoint
, "breakpoint"},
3280 {bp_hardware_breakpoint
, "hw breakpoint"},
3281 {bp_until
, "until"},
3282 {bp_finish
, "finish"},
3283 {bp_watchpoint
, "watchpoint"},
3284 {bp_hardware_watchpoint
, "hw watchpoint"},
3285 {bp_read_watchpoint
, "read watchpoint"},
3286 {bp_access_watchpoint
, "acc watchpoint"},
3287 {bp_longjmp
, "longjmp"},
3288 {bp_longjmp_resume
, "longjmp resume"},
3289 {bp_step_resume
, "step resume"},
3290 {bp_through_sigtramp
, "sigtramp"},
3291 {bp_watchpoint_scope
, "watchpoint scope"},
3292 {bp_call_dummy
, "call dummy"},
3293 {bp_shlib_event
, "shlib events"},
3294 {bp_thread_event
, "thread events"},
3295 {bp_overlay_event
, "overlay events"},
3296 {bp_catch_load
, "catch load"},
3297 {bp_catch_unload
, "catch unload"},
3298 {bp_catch_fork
, "catch fork"},
3299 {bp_catch_vfork
, "catch vfork"},
3300 {bp_catch_exec
, "catch exec"},
3301 {bp_catch_catch
, "catch catch"},
3302 {bp_catch_throw
, "catch throw"}
3305 static char *bpdisps
[] =
3306 {"del", "dstp", "dis", "keep"};
3307 static char bpenables
[] = "nynny";
3308 char wrap_indent
[80];
3309 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3310 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3311 struct cleanup
*bkpt_chain
;
3314 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3318 ui_out_field_int (uiout
, "number", b
->number
);
3322 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3323 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3324 internal_error (__FILE__
, __LINE__
,
3325 "bptypes table does not describe type #%d.",
3327 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3331 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3335 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3336 ui_out_spaces (uiout
, 2);
3339 strcpy (wrap_indent
, " ");
3342 if (TARGET_ADDR_BIT
<= 32)
3343 strcat (wrap_indent
, " ");
3345 strcat (wrap_indent
, " ");
3348 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3349 b
->ops
->print_one (b
, last_addr
);
3354 internal_error (__FILE__
, __LINE__
,
3355 "print_one_breakpoint: bp_none encountered\n");
3359 case bp_hardware_watchpoint
:
3360 case bp_read_watchpoint
:
3361 case bp_access_watchpoint
:
3362 /* Field 4, the address, is omitted (which makes the columns
3363 not line up too nicely with the headers, but the effect
3364 is relatively readable). */
3366 ui_out_field_skip (uiout
, "addr");
3368 print_expression (b
->exp
, stb
->stream
);
3369 ui_out_field_stream (uiout
, "what", stb
);
3373 case bp_catch_unload
:
3374 /* Field 4, the address, is omitted (which makes the columns
3375 not line up too nicely with the headers, but the effect
3376 is relatively readable). */
3378 ui_out_field_skip (uiout
, "addr");
3380 if (b
->dll_pathname
== NULL
)
3382 ui_out_field_string (uiout
, "what", "<any library>");
3383 ui_out_spaces (uiout
, 1);
3387 ui_out_text (uiout
, "library \"");
3388 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3389 ui_out_text (uiout
, "\" ");
3394 case bp_catch_vfork
:
3395 /* Field 4, the address, is omitted (which makes the columns
3396 not line up too nicely with the headers, but the effect
3397 is relatively readable). */
3399 ui_out_field_skip (uiout
, "addr");
3401 if (b
->forked_inferior_pid
!= 0)
3403 ui_out_text (uiout
, "process ");
3404 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3405 ui_out_spaces (uiout
, 1);
3409 /* Field 4, the address, is omitted (which makes the columns
3410 not line up too nicely with the headers, but the effect
3411 is relatively readable). */
3413 ui_out_field_skip (uiout
, "addr");
3415 if (b
->exec_pathname
!= NULL
)
3417 ui_out_text (uiout
, "program \"");
3418 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3419 ui_out_text (uiout
, "\" ");
3423 case bp_catch_catch
:
3424 /* Field 4, the address, is omitted (which makes the columns
3425 not line up too nicely with the headers, but the effect
3426 is relatively readable). */
3428 ui_out_field_skip (uiout
, "addr");
3430 ui_out_field_string (uiout
, "what", "exception catch");
3431 ui_out_spaces (uiout
, 1);
3434 case bp_catch_throw
:
3435 /* Field 4, the address, is omitted (which makes the columns
3436 not line up too nicely with the headers, but the effect
3437 is relatively readable). */
3439 ui_out_field_skip (uiout
, "addr");
3441 ui_out_field_string (uiout
, "what", "exception throw");
3442 ui_out_spaces (uiout
, 1);
3446 case bp_hardware_breakpoint
:
3450 case bp_longjmp_resume
:
3451 case bp_step_resume
:
3452 case bp_through_sigtramp
:
3453 case bp_watchpoint_scope
:
3455 case bp_shlib_event
:
3456 case bp_thread_event
:
3457 case bp_overlay_event
:
3461 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
3464 *last_addr
= b
->loc
->address
;
3467 sym
= find_pc_sect_function (b
->loc
->address
, b
->loc
->section
);
3470 ui_out_text (uiout
, "in ");
3471 ui_out_field_string (uiout
, "func",
3472 SYMBOL_PRINT_NAME (sym
));
3473 ui_out_wrap_hint (uiout
, wrap_indent
);
3474 ui_out_text (uiout
, " at ");
3476 ui_out_field_string (uiout
, "file", b
->source_file
);
3477 ui_out_text (uiout
, ":");
3478 ui_out_field_int (uiout
, "line", b
->line_number
);
3482 print_address_symbolic (b
->loc
->address
, stb
->stream
, demangle
, "");
3483 ui_out_field_stream (uiout
, "at", stb
);
3488 if (b
->thread
!= -1)
3490 /* FIXME: This seems to be redundant and lost here; see the
3491 "stop only in" line a little further down. */
3492 ui_out_text (uiout
, " thread ");
3493 ui_out_field_int (uiout
, "thread", b
->thread
);
3496 ui_out_text (uiout
, "\n");
3498 if (frame_id_p (b
->frame_id
))
3501 ui_out_text (uiout
, "\tstop only in stack frame at ");
3502 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3504 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3505 ui_out_text (uiout
, "\n");
3511 ui_out_text (uiout
, "\tstop only if ");
3512 print_expression (b
->cond
, stb
->stream
);
3513 ui_out_field_stream (uiout
, "cond", stb
);
3514 ui_out_text (uiout
, "\n");
3517 if (b
->thread
!= -1)
3519 /* FIXME should make an annotation for this */
3520 ui_out_text (uiout
, "\tstop only in thread ");
3521 ui_out_field_int (uiout
, "thread", b
->thread
);
3522 ui_out_text (uiout
, "\n");
3525 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3527 /* FIXME should make an annotation for this */
3528 if (ep_is_catchpoint (b
))
3529 ui_out_text (uiout
, "\tcatchpoint");
3531 ui_out_text (uiout
, "\tbreakpoint");
3532 ui_out_text (uiout
, " already hit ");
3533 ui_out_field_int (uiout
, "times", b
->hit_count
);
3534 if (b
->hit_count
== 1)
3535 ui_out_text (uiout
, " time\n");
3537 ui_out_text (uiout
, " times\n");
3540 /* Output the count also if it is zero, but only if this is
3541 mi. FIXME: Should have a better test for this. */
3542 if (ui_out_is_mi_like_p (uiout
))
3543 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3544 ui_out_field_int (uiout
, "times", b
->hit_count
);
3546 if (b
->ignore_count
)
3549 ui_out_text (uiout
, "\tignore next ");
3550 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3551 ui_out_text (uiout
, " hits\n");
3554 if ((l
= b
->commands
))
3556 struct cleanup
*script_chain
;
3559 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3560 print_command_lines (uiout
, l
, 4);
3561 do_cleanups (script_chain
);
3563 do_cleanups (bkpt_chain
);
3564 do_cleanups (old_chain
);
3567 struct captured_breakpoint_query_args
3573 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3575 struct captured_breakpoint_query_args
*args
= data
;
3576 struct breakpoint
*b
;
3577 CORE_ADDR dummy_addr
= 0;
3580 if (args
->bnum
== b
->number
)
3582 print_one_breakpoint (b
, &dummy_addr
);
3590 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
)
3592 struct captured_breakpoint_query_args args
;
3594 /* For the moment we don't trust print_one_breakpoint() to not throw
3596 return catch_exceptions (uiout
, do_captured_breakpoint_query
, &args
,
3597 NULL
, RETURN_MASK_ALL
);
3600 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3601 catchpoints, et.al.). */
3604 user_settable_breakpoint (const struct breakpoint
*b
)
3606 return (b
->type
== bp_breakpoint
3607 || b
->type
== bp_catch_load
3608 || b
->type
== bp_catch_unload
3609 || b
->type
== bp_catch_fork
3610 || b
->type
== bp_catch_vfork
3611 || b
->type
== bp_catch_exec
3612 || b
->type
== bp_catch_catch
3613 || b
->type
== bp_catch_throw
3614 || b
->type
== bp_hardware_breakpoint
3615 || b
->type
== bp_watchpoint
3616 || b
->type
== bp_read_watchpoint
3617 || b
->type
== bp_access_watchpoint
3618 || b
->type
== bp_hardware_watchpoint
);
3621 /* Print information on user settable breakpoint (watchpoint, etc)
3622 number BNUM. If BNUM is -1 print all user settable breakpoints.
3623 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3626 breakpoint_1 (int bnum
, int allflag
)
3628 struct breakpoint
*b
;
3629 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3630 int nr_printable_breakpoints
;
3631 struct cleanup
*bkpttbl_chain
;
3633 /* Compute the number of rows in the table. */
3634 nr_printable_breakpoints
= 0;
3637 || bnum
== b
->number
)
3639 if (allflag
|| user_settable_breakpoint (b
))
3640 nr_printable_breakpoints
++;
3645 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3649 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3652 if (nr_printable_breakpoints
> 0)
3653 annotate_breakpoints_headers ();
3654 if (nr_printable_breakpoints
> 0)
3656 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3657 if (nr_printable_breakpoints
> 0)
3659 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3660 if (nr_printable_breakpoints
> 0)
3662 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3663 if (nr_printable_breakpoints
> 0)
3665 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3668 if (nr_printable_breakpoints
> 0)
3670 if (TARGET_ADDR_BIT
<= 32)
3671 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3673 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3675 if (nr_printable_breakpoints
> 0)
3677 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3678 ui_out_table_body (uiout
);
3679 if (nr_printable_breakpoints
> 0)
3680 annotate_breakpoints_table ();
3684 || bnum
== b
->number
)
3686 /* We only print out user settable breakpoints unless the
3688 if (allflag
|| user_settable_breakpoint (b
))
3689 print_one_breakpoint (b
, &last_addr
);
3692 do_cleanups (bkpttbl_chain
);
3694 if (nr_printable_breakpoints
== 0)
3697 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3699 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3704 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3705 that a comparison of an unsigned with -1 is always false. */
3706 if (last_addr
!= (CORE_ADDR
) -1)
3707 set_next_address (last_addr
);
3710 /* FIXME? Should this be moved up so that it is only called when
3711 there have been breakpoints? */
3712 annotate_breakpoints_table_end ();
3716 breakpoints_info (char *bnum_exp
, int from_tty
)
3721 bnum
= parse_and_eval_long (bnum_exp
);
3723 breakpoint_1 (bnum
, 0);
3727 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3732 bnum
= parse_and_eval_long (bnum_exp
);
3734 breakpoint_1 (bnum
, 1);
3737 /* Print a message describing any breakpoints set at PC. */
3740 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3743 struct breakpoint
*b
;
3746 if (b
->loc
->address
== pc
) /* address match / overlay match */
3747 if (!overlay_debugging
|| b
->loc
->section
== section
)
3751 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3753 if (b
->loc
->address
== pc
) /* address match / overlay match */
3754 if (!overlay_debugging
|| b
->loc
->section
== section
)
3757 printf_filtered ("%d%s%s ",
3759 ((b
->enable_state
== bp_disabled
||
3760 b
->enable_state
== bp_shlib_disabled
||
3761 b
->enable_state
== bp_call_disabled
)
3763 : b
->enable_state
== bp_permanent
3767 : ((others
== 1) ? " and" : ""));
3769 printf_filtered ("also set at pc ");
3770 print_address_numeric (pc
, 1, gdb_stdout
);
3771 printf_filtered (".\n");
3775 /* Set the default place to put a breakpoint
3776 for the `break' command with no arguments. */
3779 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3782 default_breakpoint_valid
= valid
;
3783 default_breakpoint_address
= addr
;
3784 default_breakpoint_symtab
= symtab
;
3785 default_breakpoint_line
= line
;
3788 /* Return true iff it is meaningful to use the address member of
3789 BPT. For some breakpoint types, the address member is irrelevant
3790 and it makes no sense to attempt to compare it to other addresses
3791 (or use it for any other purpose either).
3793 More specifically, each of the following breakpoint types will always
3794 have a zero valued address and we don't want check_duplicates() to mark
3795 breakpoints of any of these types to be a duplicate of an actual
3796 breakpoint at address zero:
3799 bp_hardware_watchpoint
3801 bp_access_watchpoint
3808 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3810 enum bptype type
= bpt
->type
;
3812 return (type
!= bp_watchpoint
3813 && type
!= bp_hardware_watchpoint
3814 && type
!= bp_read_watchpoint
3815 && type
!= bp_access_watchpoint
3816 && type
!= bp_catch_exec
3817 && type
!= bp_longjmp_resume
3818 && type
!= bp_catch_fork
3819 && type
!= bp_catch_vfork
);
3822 /* Rescan breakpoints at the same address and section as BPT,
3823 marking the first one as "first" and any others as "duplicates".
3824 This is so that the bpt instruction is only inserted once.
3825 If we have a permanent breakpoint at the same place as BPT, make
3826 that one the official one, and the rest as duplicates. */
3829 check_duplicates (struct breakpoint
*bpt
)
3831 struct bp_location
*b
;
3833 struct bp_location
*perm_bp
= 0;
3834 CORE_ADDR address
= bpt
->loc
->address
;
3835 asection
*section
= bpt
->loc
->section
;
3837 if (! breakpoint_address_is_meaningful (bpt
))
3840 ALL_BP_LOCATIONS (b
)
3841 if (b
->owner
->enable_state
!= bp_disabled
3842 && b
->owner
->enable_state
!= bp_shlib_disabled
3843 && b
->owner
->enable_state
!= bp_call_disabled
3844 && b
->address
== address
/* address / overlay match */
3845 && (!overlay_debugging
|| b
->section
== section
)
3846 && breakpoint_address_is_meaningful (b
->owner
))
3848 /* Have we found a permanent breakpoint? */
3849 if (b
->owner
->enable_state
== bp_permanent
)
3856 b
->duplicate
= count
> 1;
3859 /* If we found a permanent breakpoint at this address, go over the
3860 list again and declare all the other breakpoints there to be the
3864 perm_bp
->duplicate
= 0;
3866 /* Permanent breakpoint should always be inserted. */
3867 if (! perm_bp
->inserted
)
3868 internal_error (__FILE__
, __LINE__
,
3869 "allegedly permanent breakpoint is not "
3870 "actually inserted");
3872 ALL_BP_LOCATIONS (b
)
3875 if (b
->owner
->enable_state
!= bp_disabled
3876 && b
->owner
->enable_state
!= bp_shlib_disabled
3877 && b
->owner
->enable_state
!= bp_call_disabled
3878 && b
->address
== address
/* address / overlay match */
3879 && (!overlay_debugging
|| b
->section
== section
)
3880 && breakpoint_address_is_meaningful (b
->owner
))
3883 internal_error (__FILE__
, __LINE__
,
3884 "another breakpoint was inserted on top of "
3885 "a permanent breakpoint");
3894 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
3895 int bnum
, int have_bnum
)
3900 strcpy (astr1
, local_hex_string_custom ((unsigned long) from_addr
, "08l"));
3901 strcpy (astr2
, local_hex_string_custom ((unsigned long) to_addr
, "08l"));
3903 warning ("Breakpoint %d address previously adjusted from %s to %s.",
3904 bnum
, astr1
, astr2
);
3906 warning ("Breakpoint address adjusted from %s to %s.", astr1
, astr2
);
3909 /* Adjust a breakpoint's address to account for architectural constraints
3910 on breakpoint placement. Return the adjusted address. Note: Very
3911 few targets require this kind of adjustment. For most targets,
3912 this function is simply the identity function. */
3915 adjust_breakpoint_address (CORE_ADDR bpaddr
)
3917 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
3919 /* Very few targets need any kind of breakpoint adjustment. */
3924 CORE_ADDR adjusted_bpaddr
;
3926 /* Some targets have architectural constraints on the placement
3927 of breakpoint instructions. Obtain the adjusted address. */
3928 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
3931 /* An adjusted breakpoint address can significantly alter
3932 a user's expectations. Print a warning if an adjustment
3934 if (adjusted_bpaddr
!= bpaddr
)
3935 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
3937 return adjusted_bpaddr
;
3941 /* Allocate a struct bp_location. */
3943 static struct bp_location
*
3944 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
3946 struct bp_location
*loc
, *loc_p
;
3948 loc
= xmalloc (sizeof (struct bp_location
));
3949 memset (loc
, 0, sizeof (*loc
));
3959 case bp_longjmp_resume
:
3960 case bp_step_resume
:
3961 case bp_through_sigtramp
:
3962 case bp_watchpoint_scope
:
3964 case bp_shlib_event
:
3965 case bp_thread_event
:
3966 case bp_overlay_event
:
3968 case bp_catch_unload
:
3969 loc
->loc_type
= bp_loc_software_breakpoint
;
3971 case bp_hardware_breakpoint
:
3972 loc
->loc_type
= bp_loc_hardware_breakpoint
;
3974 case bp_hardware_watchpoint
:
3975 case bp_read_watchpoint
:
3976 case bp_access_watchpoint
:
3977 loc
->loc_type
= bp_loc_hardware_watchpoint
;
3981 case bp_catch_vfork
:
3983 case bp_catch_catch
:
3984 case bp_catch_throw
:
3985 loc
->loc_type
= bp_loc_other
;
3988 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
3991 /* Add this breakpoint to the end of the chain. */
3993 loc_p
= bp_location_chain
;
3995 bp_location_chain
= loc
;
3999 loc_p
= loc_p
->next
;
4006 /* set_raw_breakpoint() is a low level routine for allocating and
4007 partially initializing a breakpoint of type BPTYPE. The newly
4008 created breakpoint's address, section, source file name, and line
4009 number are provided by SAL. The newly created and partially
4010 initialized breakpoint is added to the breakpoint chain and
4011 is also returned as the value of this function.
4013 It is expected that the caller will complete the initialization of
4014 the newly created breakpoint struct as well as output any status
4015 information regarding the creation of a new breakpoint. In
4016 particular, set_raw_breakpoint() does NOT set the breakpoint
4017 number! Care should be taken to not allow an error() to occur
4018 prior to completing the initialization of the breakpoint. If this
4019 should happen, a bogus breakpoint will be left on the chain. */
4022 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4024 struct breakpoint
*b
, *b1
;
4026 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4027 memset (b
, 0, sizeof (*b
));
4028 b
->loc
= allocate_bp_location (b
, bptype
);
4029 b
->loc
->requested_address
= sal
.pc
;
4030 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
);
4031 if (sal
.symtab
== NULL
)
4032 b
->source_file
= NULL
;
4034 b
->source_file
= savestring (sal
.symtab
->filename
,
4035 strlen (sal
.symtab
->filename
));
4036 b
->loc
->section
= sal
.section
;
4038 b
->language
= current_language
->la_language
;
4039 b
->input_radix
= input_radix
;
4041 b
->line_number
= sal
.line
;
4042 b
->enable_state
= bp_enabled
;
4045 b
->ignore_count
= 0;
4047 b
->frame_id
= null_frame_id
;
4048 b
->dll_pathname
= NULL
;
4049 b
->triggered_dll_pathname
= NULL
;
4050 b
->forked_inferior_pid
= 0;
4051 b
->exec_pathname
= NULL
;
4054 /* Add this breakpoint to the end of the chain
4055 so that a list of breakpoints will come out in order
4056 of increasing numbers. */
4058 b1
= breakpoint_chain
;
4060 breakpoint_chain
= b
;
4068 check_duplicates (b
);
4069 breakpoints_changed ();
4075 /* Note that the breakpoint object B describes a permanent breakpoint
4076 instruction, hard-wired into the inferior's code. */
4078 make_breakpoint_permanent (struct breakpoint
*b
)
4080 b
->enable_state
= bp_permanent
;
4082 /* By definition, permanent breakpoints are already present in the code. */
4083 b
->loc
->inserted
= 1;
4086 static struct breakpoint
*
4087 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4089 static int internal_breakpoint_number
= -1;
4090 struct symtab_and_line sal
;
4091 struct breakpoint
*b
;
4093 init_sal (&sal
); /* initialize to zeroes */
4096 sal
.section
= find_pc_overlay (sal
.pc
);
4098 b
= set_raw_breakpoint (sal
, type
);
4099 b
->number
= internal_breakpoint_number
--;
4100 b
->disposition
= disp_donttouch
;
4107 create_longjmp_breakpoint (char *func_name
)
4109 struct breakpoint
*b
;
4110 struct minimal_symbol
*m
;
4112 if (func_name
== NULL
)
4113 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
4116 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4119 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4122 b
->enable_state
= bp_disabled
;
4125 b
->addr_string
= xstrdup (func_name
);
4128 /* Call this routine when stepping and nexting to enable a breakpoint
4129 if we do a longjmp(). When we hit that breakpoint, call
4130 set_longjmp_resume_breakpoint() to figure out where we are going. */
4133 enable_longjmp_breakpoint (void)
4135 struct breakpoint
*b
;
4138 if (b
->type
== bp_longjmp
)
4140 b
->enable_state
= bp_enabled
;
4141 check_duplicates (b
);
4146 disable_longjmp_breakpoint (void)
4148 struct breakpoint
*b
;
4151 if (b
->type
== bp_longjmp
4152 || b
->type
== bp_longjmp_resume
)
4154 b
->enable_state
= bp_disabled
;
4155 check_duplicates (b
);
4160 create_overlay_event_breakpoint (char *func_name
)
4162 struct breakpoint
*b
;
4163 struct minimal_symbol
*m
;
4165 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4168 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4170 b
->addr_string
= xstrdup (func_name
);
4172 if (overlay_debugging
== ovly_auto
)
4174 b
->enable_state
= bp_enabled
;
4175 overlay_events_enabled
= 1;
4179 b
->enable_state
= bp_disabled
;
4180 overlay_events_enabled
= 0;
4185 enable_overlay_breakpoints (void)
4187 struct breakpoint
*b
;
4190 if (b
->type
== bp_overlay_event
)
4192 b
->enable_state
= bp_enabled
;
4193 check_duplicates (b
);
4194 overlay_events_enabled
= 1;
4199 disable_overlay_breakpoints (void)
4201 struct breakpoint
*b
;
4204 if (b
->type
== bp_overlay_event
)
4206 b
->enable_state
= bp_disabled
;
4207 check_duplicates (b
);
4208 overlay_events_enabled
= 0;
4213 create_thread_event_breakpoint (CORE_ADDR address
)
4215 struct breakpoint
*b
;
4217 b
= create_internal_breakpoint (address
, bp_thread_event
);
4219 b
->enable_state
= bp_enabled
;
4220 /* addr_string has to be used or breakpoint_re_set will delete me. */
4221 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->loc
->address
));
4227 remove_thread_event_breakpoints (void)
4229 struct breakpoint
*b
, *temp
;
4231 ALL_BREAKPOINTS_SAFE (b
, temp
)
4232 if (b
->type
== bp_thread_event
)
4233 delete_breakpoint (b
);
4238 remove_solib_event_breakpoints (void)
4240 struct breakpoint
*b
, *temp
;
4242 ALL_BREAKPOINTS_SAFE (b
, temp
)
4243 if (b
->type
== bp_shlib_event
)
4244 delete_breakpoint (b
);
4248 create_solib_event_breakpoint (CORE_ADDR address
)
4250 struct breakpoint
*b
;
4252 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4256 /* Disable any breakpoints that are on code in shared libraries. Only
4257 apply to enabled breakpoints, disabled ones can just stay disabled. */
4260 disable_breakpoints_in_shlibs (int silent
)
4262 struct breakpoint
*b
;
4263 int disabled_shlib_breaks
= 0;
4265 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4268 #if defined (PC_SOLIB)
4269 if (((b
->type
== bp_breakpoint
) ||
4270 (b
->type
== bp_hardware_breakpoint
)) &&
4271 b
->enable_state
== bp_enabled
&&
4272 !b
->loc
->duplicate
&&
4273 PC_SOLIB (b
->loc
->address
))
4275 b
->enable_state
= bp_shlib_disabled
;
4278 if (!disabled_shlib_breaks
)
4280 target_terminal_ours_for_output ();
4281 warning ("Temporarily disabling shared library breakpoints:");
4283 disabled_shlib_breaks
= 1;
4284 warning ("breakpoint #%d ", b
->number
);
4291 /* Try to reenable any breakpoints in shared libraries. */
4293 re_enable_breakpoints_in_shlibs (void)
4295 struct breakpoint
*b
;
4298 if (b
->enable_state
== bp_shlib_disabled
)
4302 /* Do not reenable the breakpoint if the shared library
4303 is still not mapped in. */
4304 if (target_read_memory (b
->loc
->address
, buf
, 1) == 0)
4305 b
->enable_state
= bp_enabled
;
4312 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4313 char *cond_string
, enum bptype bp_kind
)
4315 struct breakpoint
*b
;
4316 struct symtabs_and_lines sals
;
4317 struct cleanup
*old_chain
;
4318 struct cleanup
*canonical_strings_chain
= NULL
;
4319 char *addr_start
= hookname
;
4320 char *addr_end
= NULL
;
4321 char **canonical
= (char **) NULL
;
4322 int thread
= -1; /* All threads. */
4324 /* Set a breakpoint on the specified hook. */
4325 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
, 0, &canonical
);
4326 addr_end
= hookname
;
4328 if (sals
.nelts
== 0)
4330 warning ("Unable to set a breakpoint on dynamic linker callback.");
4331 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4332 warning ("GDB will be unable to track shl_load/shl_unload calls");
4335 if (sals
.nelts
!= 1)
4337 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4338 warning ("GDB will be unable to track shl_load/shl_unload calls");
4342 /* Make sure that all storage allocated in decode_line_1 gets freed
4343 in case the following errors out. */
4344 old_chain
= make_cleanup (xfree
, sals
.sals
);
4345 if (canonical
!= (char **) NULL
)
4347 make_cleanup (xfree
, canonical
);
4348 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4349 if (canonical
[0] != NULL
)
4350 make_cleanup (xfree
, canonical
[0]);
4353 resolve_sal_pc (&sals
.sals
[0]);
4355 /* Remove the canonical strings from the cleanup, they are needed below. */
4356 if (canonical
!= (char **) NULL
)
4357 discard_cleanups (canonical_strings_chain
);
4359 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4360 set_breakpoint_count (breakpoint_count
+ 1);
4361 b
->number
= breakpoint_count
;
4363 b
->cond_string
= (cond_string
== NULL
) ?
4364 NULL
: savestring (cond_string
, strlen (cond_string
));
4367 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4368 b
->addr_string
= canonical
[0];
4369 else if (addr_start
)
4370 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4372 b
->enable_state
= bp_enabled
;
4373 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4375 if (dll_pathname
== NULL
)
4376 b
->dll_pathname
= NULL
;
4379 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4380 strcpy (b
->dll_pathname
, dll_pathname
);
4384 do_cleanups (old_chain
);
4388 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4389 char *dll_pathname
, char *cond_string
)
4391 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4392 cond_string
, bp_catch_load
);
4396 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4397 char *dll_pathname
, char *cond_string
)
4399 solib_load_unload_1 (hookname
,tempflag
, dll_pathname
,
4400 cond_string
, bp_catch_unload
);
4404 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4405 enum bptype bp_kind
)
4407 struct symtab_and_line sal
;
4408 struct breakpoint
*b
;
4409 int thread
= -1; /* All threads. */
4416 b
= set_raw_breakpoint (sal
, bp_kind
);
4417 set_breakpoint_count (breakpoint_count
+ 1);
4418 b
->number
= breakpoint_count
;
4420 b
->cond_string
= (cond_string
== NULL
) ?
4421 NULL
: savestring (cond_string
, strlen (cond_string
));
4423 b
->addr_string
= NULL
;
4424 b
->enable_state
= bp_enabled
;
4425 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4426 b
->forked_inferior_pid
= 0;
4432 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4434 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4438 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4440 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4444 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4446 struct symtab_and_line sal
;
4447 struct breakpoint
*b
;
4448 int thread
= -1; /* All threads. */
4455 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4456 set_breakpoint_count (breakpoint_count
+ 1);
4457 b
->number
= breakpoint_count
;
4459 b
->cond_string
= (cond_string
== NULL
) ?
4460 NULL
: savestring (cond_string
, strlen (cond_string
));
4462 b
->addr_string
= NULL
;
4463 b
->enable_state
= bp_enabled
;
4464 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4470 hw_breakpoint_used_count (void)
4472 struct breakpoint
*b
;
4477 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4485 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4487 struct breakpoint
*b
;
4490 *other_type_used
= 0;
4493 if (b
->enable_state
== bp_enabled
)
4495 if (b
->type
== type
)
4497 else if ((b
->type
== bp_hardware_watchpoint
||
4498 b
->type
== bp_read_watchpoint
||
4499 b
->type
== bp_access_watchpoint
)
4500 && b
->enable_state
== bp_enabled
)
4501 *other_type_used
= 1;
4507 /* Call this after hitting the longjmp() breakpoint. Use this to set
4508 a new breakpoint at the target of the jmp_buf.
4510 FIXME - This ought to be done by setting a temporary breakpoint
4511 that gets deleted automatically... */
4514 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4516 struct breakpoint
*b
;
4519 if (b
->type
== bp_longjmp_resume
)
4521 b
->loc
->requested_address
= pc
;
4522 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
);
4523 b
->enable_state
= bp_enabled
;
4524 b
->frame_id
= frame_id
;
4525 check_duplicates (b
);
4531 disable_watchpoints_before_interactive_call_start (void)
4533 struct breakpoint
*b
;
4537 if (((b
->type
== bp_watchpoint
)
4538 || (b
->type
== bp_hardware_watchpoint
)
4539 || (b
->type
== bp_read_watchpoint
)
4540 || (b
->type
== bp_access_watchpoint
)
4541 || ep_is_exception_catchpoint (b
))
4542 && (b
->enable_state
== bp_enabled
))
4544 b
->enable_state
= bp_call_disabled
;
4545 check_duplicates (b
);
4551 enable_watchpoints_after_interactive_call_stop (void)
4553 struct breakpoint
*b
;
4557 if (((b
->type
== bp_watchpoint
)
4558 || (b
->type
== bp_hardware_watchpoint
)
4559 || (b
->type
== bp_read_watchpoint
)
4560 || (b
->type
== bp_access_watchpoint
)
4561 || ep_is_exception_catchpoint (b
))
4562 && (b
->enable_state
== bp_call_disabled
))
4564 b
->enable_state
= bp_enabled
;
4565 check_duplicates (b
);
4571 /* Set a breakpoint that will evaporate an end of command
4572 at address specified by SAL.
4573 Restrict it to frame FRAME if FRAME is nonzero. */
4576 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4579 struct breakpoint
*b
;
4580 b
= set_raw_breakpoint (sal
, type
);
4581 b
->enable_state
= bp_enabled
;
4582 b
->disposition
= disp_donttouch
;
4583 b
->frame_id
= frame_id
;
4585 /* If we're debugging a multi-threaded program, then we
4586 want momentary breakpoints to be active in only a
4587 single thread of control. */
4588 if (in_thread_list (inferior_ptid
))
4589 b
->thread
= pid_to_thread_id (inferior_ptid
);
4595 /* Tell the user we have just set a breakpoint B. */
4598 mention (struct breakpoint
*b
)
4601 struct cleanup
*old_chain
, *ui_out_chain
;
4602 struct ui_stream
*stb
;
4604 stb
= ui_out_stream_new (uiout
);
4605 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4607 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4608 watchpoint) other than breakpoint creation. It should be possible to
4609 clean this up and at the same time replace the random calls to
4610 breakpoint_changed with this hook, as has already been done for
4611 delete_breakpoint_hook and so on. */
4612 if (create_breakpoint_hook
)
4613 create_breakpoint_hook (b
);
4614 breakpoint_create_event (b
->number
);
4616 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4617 b
->ops
->print_mention (b
);
4622 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4625 ui_out_text (uiout
, "Watchpoint ");
4626 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4627 ui_out_field_int (uiout
, "number", b
->number
);
4628 ui_out_text (uiout
, ": ");
4629 print_expression (b
->exp
, stb
->stream
);
4630 ui_out_field_stream (uiout
, "exp", stb
);
4631 do_cleanups (ui_out_chain
);
4633 case bp_hardware_watchpoint
:
4634 ui_out_text (uiout
, "Hardware watchpoint ");
4635 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4636 ui_out_field_int (uiout
, "number", b
->number
);
4637 ui_out_text (uiout
, ": ");
4638 print_expression (b
->exp
, stb
->stream
);
4639 ui_out_field_stream (uiout
, "exp", stb
);
4640 do_cleanups (ui_out_chain
);
4642 case bp_read_watchpoint
:
4643 ui_out_text (uiout
, "Hardware read watchpoint ");
4644 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4645 ui_out_field_int (uiout
, "number", b
->number
);
4646 ui_out_text (uiout
, ": ");
4647 print_expression (b
->exp
, stb
->stream
);
4648 ui_out_field_stream (uiout
, "exp", stb
);
4649 do_cleanups (ui_out_chain
);
4651 case bp_access_watchpoint
:
4652 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4653 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4654 ui_out_field_int (uiout
, "number", b
->number
);
4655 ui_out_text (uiout
, ": ");
4656 print_expression (b
->exp
, stb
->stream
);
4657 ui_out_field_stream (uiout
, "exp", stb
);
4658 do_cleanups (ui_out_chain
);
4661 if (ui_out_is_mi_like_p (uiout
))
4666 printf_filtered ("Breakpoint %d", b
->number
);
4669 case bp_hardware_breakpoint
:
4670 if (ui_out_is_mi_like_p (uiout
))
4675 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4679 case bp_catch_unload
:
4680 printf_filtered ("Catchpoint %d (%s %s)",
4682 (b
->type
== bp_catch_load
) ? "load" : "unload",
4683 (b
->dll_pathname
!= NULL
) ?
4684 b
->dll_pathname
: "<any library>");
4687 case bp_catch_vfork
:
4688 printf_filtered ("Catchpoint %d (%s)",
4690 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4693 printf_filtered ("Catchpoint %d (exec)",
4696 case bp_catch_catch
:
4697 case bp_catch_throw
:
4698 printf_filtered ("Catchpoint %d (%s)",
4700 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4706 case bp_longjmp_resume
:
4707 case bp_step_resume
:
4708 case bp_through_sigtramp
:
4710 case bp_watchpoint_scope
:
4711 case bp_shlib_event
:
4712 case bp_thread_event
:
4713 case bp_overlay_event
:
4719 if (addressprint
|| b
->source_file
== NULL
)
4721 printf_filtered (" at ");
4722 print_address_numeric (b
->loc
->address
, 1, gdb_stdout
);
4725 printf_filtered (": file %s, line %d.",
4726 b
->source_file
, b
->line_number
);
4728 do_cleanups (old_chain
);
4729 if (ui_out_is_mi_like_p (uiout
))
4731 printf_filtered ("\n");
4735 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4736 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4737 COND[i] and COND_STRING[i] values.
4739 NOTE: If the function succeeds, the caller is expected to cleanup
4740 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4741 array contents). If the function fails (error() is called), the
4742 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4743 COND and SALS arrays and each of those arrays contents. */
4746 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4747 struct expression
**cond
, char **cond_string
,
4748 enum bptype type
, enum bpdisp disposition
,
4749 int thread
, int ignore_count
, int from_tty
)
4751 if (type
== bp_hardware_breakpoint
)
4753 int i
= hw_breakpoint_used_count ();
4754 int target_resources_ok
=
4755 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4757 if (target_resources_ok
== 0)
4758 error ("No hardware breakpoint support in the target.");
4759 else if (target_resources_ok
< 0)
4760 error ("Hardware breakpoints used exceeds limit.");
4763 /* Now set all the breakpoints. */
4766 for (i
= 0; i
< sals
.nelts
; i
++)
4768 struct breakpoint
*b
;
4769 struct symtab_and_line sal
= sals
.sals
[i
];
4772 describe_other_breakpoints (sal
.pc
, sal
.section
);
4774 b
= set_raw_breakpoint (sal
, type
);
4775 set_breakpoint_count (breakpoint_count
+ 1);
4776 b
->number
= breakpoint_count
;
4780 b
->addr_string
= addr_string
[i
];
4782 /* addr_string has to be used or breakpoint_re_set will delete
4784 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->loc
->address
));
4785 b
->cond_string
= cond_string
[i
];
4786 b
->ignore_count
= ignore_count
;
4787 b
->enable_state
= bp_enabled
;
4788 b
->disposition
= disposition
;
4794 /* Parse ARG which is assumed to be a SAL specification possibly
4795 followed by conditionals. On return, SALS contains an array of SAL
4796 addresses found. ADDR_STRING contains a vector of (canonical)
4797 address strings. ARG points to the end of the SAL. */
4800 parse_breakpoint_sals (char **address
,
4801 struct symtabs_and_lines
*sals
,
4802 char ***addr_string
)
4804 char *addr_start
= *address
;
4805 *addr_string
= NULL
;
4806 /* If no arg given, or if first arg is 'if ', use the default
4808 if ((*address
) == NULL
4809 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4811 if (default_breakpoint_valid
)
4813 struct symtab_and_line sal
;
4814 init_sal (&sal
); /* initialize to zeroes */
4815 sals
->sals
= (struct symtab_and_line
*)
4816 xmalloc (sizeof (struct symtab_and_line
));
4817 sal
.pc
= default_breakpoint_address
;
4818 sal
.line
= default_breakpoint_line
;
4819 sal
.symtab
= default_breakpoint_symtab
;
4820 sal
.section
= find_pc_overlay (sal
.pc
);
4821 sals
->sals
[0] = sal
;
4825 error ("No default breakpoint address now.");
4829 /* Force almost all breakpoints to be in terms of the
4830 current_source_symtab (which is decode_line_1's default). This
4831 should produce the results we want almost all of the time while
4832 leaving default_breakpoint_* alone.
4833 ObjC: However, don't match an Objective-C method name which
4834 may have a '+' or '-' succeeded by a '[' */
4836 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
4838 if (default_breakpoint_valid
4840 || ((strchr ("+-", (*address
)[0]) != NULL
)
4841 && ((*address
)[1] != '['))))
4842 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
4843 default_breakpoint_line
, addr_string
);
4845 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0, addr_string
);
4847 /* For any SAL that didn't have a canonical string, fill one in. */
4848 if (sals
->nelts
> 0 && *addr_string
== NULL
)
4849 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
4850 if (addr_start
!= (*address
))
4853 for (i
= 0; i
< sals
->nelts
; i
++)
4855 /* Add the string if not present. */
4856 if ((*addr_string
)[i
] == NULL
)
4857 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
4863 /* Convert each SAL into a real PC. Verify that the PC can be
4864 inserted as a breakpoint. If it can't throw an error. */
4867 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
4871 for (i
= 0; i
< sals
->nelts
; i
++)
4873 resolve_sal_pc (&sals
->sals
[i
]);
4875 /* It's possible for the PC to be nonzero, but still an illegal
4876 value on some targets.
4878 For example, on HP-UX if you start gdb, and before running the
4879 inferior you try to set a breakpoint on a shared library function
4880 "foo" where the inferior doesn't call "foo" directly but does
4881 pass its address to another function call, then we do find a
4882 minimal symbol for the "foo", but it's address is invalid.
4883 (Appears to be an index into a table that the loader sets up
4884 when the inferior is run.)
4886 Give the target a chance to bless sals.sals[i].pc before we
4887 try to make a breakpoint for it. */
4888 if (PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
4890 if (address
== NULL
)
4891 error ("Cannot break without a running program.");
4893 error ("Cannot break on %s without a running program.",
4899 /* Set a breakpoint according to ARG (function, linenum or *address)
4900 flag: first bit : 0 non-temporary, 1 temporary.
4901 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4904 break_command_1 (char *arg
, int flag
, int from_tty
)
4906 int tempflag
, hardwareflag
;
4907 struct symtabs_and_lines sals
;
4908 struct expression
**cond
= 0;
4909 /* Pointers in arg to the start, and one past the end, of the
4911 char **cond_string
= (char **) NULL
;
4912 char *addr_start
= arg
;
4914 struct cleanup
*old_chain
;
4915 struct cleanup
*breakpoint_chain
= NULL
;
4918 int ignore_count
= 0;
4920 hardwareflag
= flag
& BP_HARDWAREFLAG
;
4921 tempflag
= flag
& BP_TEMPFLAG
;
4926 parse_breakpoint_sals (&arg
, &sals
, &addr_string
);
4931 /* Create a chain of things that always need to be cleaned up. */
4932 old_chain
= make_cleanup (null_cleanup
, 0);
4934 /* Make sure that all storage allocated to SALS gets freed. */
4935 make_cleanup (xfree
, sals
.sals
);
4937 /* Cleanup the addr_string array but not its contents. */
4938 make_cleanup (xfree
, addr_string
);
4940 /* Allocate space for all the cond expressions. */
4941 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4942 make_cleanup (xfree
, cond
);
4944 /* Allocate space for all the cond strings. */
4945 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4946 make_cleanup (xfree
, cond_string
);
4948 /* ----------------------------- SNIP -----------------------------
4949 Anything added to the cleanup chain beyond this point is assumed
4950 to be part of a breakpoint. If the breakpoint create succeeds
4951 then the memory is not reclaimed. */
4952 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4954 /* Mark the contents of the addr_string for cleanup. These go on
4955 the breakpoint_chain and only occure if the breakpoint create
4957 for (i
= 0; i
< sals
.nelts
; i
++)
4959 if (addr_string
[i
] != NULL
)
4960 make_cleanup (xfree
, addr_string
[i
]);
4963 /* Resolve all line numbers to PC's and verify that the addresses
4964 are ok for the target. */
4965 breakpoint_sals_to_pc (&sals
, addr_start
);
4967 /* Verify that condition can be parsed, before setting any
4968 breakpoints. Allocate a separate condition expression for each
4970 thread
= -1; /* No specific thread yet */
4971 for (i
= 0; i
< sals
.nelts
; i
++)
4978 char *cond_start
= NULL
;
4979 char *cond_end
= NULL
;
4980 while (*tok
== ' ' || *tok
== '\t')
4985 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
4988 toklen
= end_tok
- tok
;
4990 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
4992 tok
= cond_start
= end_tok
+ 1;
4993 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4994 make_cleanup (xfree
, cond
[i
]);
4996 cond_string
[i
] = savestring (cond_start
, cond_end
- cond_start
);
4997 make_cleanup (xfree
, cond_string
[i
]);
4999 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5005 thread
= strtol (tok
, &tok
, 0);
5007 error ("Junk after thread keyword.");
5008 if (!valid_thread_id (thread
))
5009 error ("Unknown thread %d\n", thread
);
5012 error ("Junk at end of arguments.");
5016 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5017 hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5018 tempflag
? disp_del
: disp_donttouch
,
5019 thread
, ignore_count
, from_tty
);
5023 warning ("Multiple breakpoints were set.");
5024 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5026 /* That's it. Discard the cleanups for data inserted into the
5028 discard_cleanups (breakpoint_chain
);
5029 /* But cleanup everything else. */
5030 do_cleanups (old_chain
);
5033 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
5034 linenum or *address) with COND and IGNORE_COUNT. */
5036 struct captured_breakpoint_args
5047 do_captured_breakpoint (void *data
)
5049 struct captured_breakpoint_args
*args
= data
;
5050 struct symtabs_and_lines sals
;
5051 struct expression
**cond
;
5052 struct cleanup
*old_chain
;
5053 struct cleanup
*breakpoint_chain
= NULL
;
5060 /* Parse the source and lines spec. Delay check that the expression
5061 didn't contain trailing garbage until after cleanups are in
5065 address_end
= args
->address
;
5067 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
);
5072 /* Create a chain of things at always need to be cleaned up. */
5073 old_chain
= make_cleanup (null_cleanup
, 0);
5075 /* Always have a addr_string array, even if it is empty. */
5076 make_cleanup (xfree
, addr_string
);
5078 /* Make sure that all storage allocated to SALS gets freed. */
5079 make_cleanup (xfree
, sals
.sals
);
5081 /* Allocate space for all the cond expressions. */
5082 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5083 make_cleanup (xfree
, cond
);
5085 /* Allocate space for all the cond strings. */
5086 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5087 make_cleanup (xfree
, cond_string
);
5089 /* ----------------------------- SNIP -----------------------------
5090 Anything added to the cleanup chain beyond this point is assumed
5091 to be part of a breakpoint. If the breakpoint create goes
5092 through then that memory is not cleaned up. */
5093 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5095 /* Mark the contents of the addr_string for cleanup. These go on
5096 the breakpoint_chain and only occure if the breakpoint create
5098 for (i
= 0; i
< sals
.nelts
; i
++)
5100 if (addr_string
[i
] != NULL
)
5101 make_cleanup (xfree
, addr_string
[i
]);
5104 /* Wait until now before checking for garbage at the end of the
5105 address. That way cleanups can take care of freeing any
5107 if (*address_end
!= '\0')
5108 error ("Garbage %s following breakpoint address", address_end
);
5110 /* Resolve all line numbers to PC's. */
5111 breakpoint_sals_to_pc (&sals
, args
->address
);
5113 /* Verify that conditions can be parsed, before setting any
5115 for (i
= 0; i
< sals
.nelts
; i
++)
5117 if (args
->condition
!= NULL
)
5119 char *tok
= args
->condition
;
5120 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
5122 error ("Garbage %s follows condition", tok
);
5123 make_cleanup (xfree
, cond
[i
]);
5124 cond_string
[i
] = xstrdup (args
->condition
);
5128 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5129 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5130 args
->tempflag
? disp_del
: disp_donttouch
,
5131 args
->thread
, args
->ignore_count
, 0/*from-tty*/);
5133 /* That's it. Discard the cleanups for data inserted into the
5135 discard_cleanups (breakpoint_chain
);
5136 /* But cleanup everything else. */
5137 do_cleanups (old_chain
);
5142 gdb_breakpoint (char *address
, char *condition
,
5143 int hardwareflag
, int tempflag
,
5144 int thread
, int ignore_count
)
5146 struct captured_breakpoint_args args
;
5147 args
.address
= address
;
5148 args
.condition
= condition
;
5149 args
.hardwareflag
= hardwareflag
;
5150 args
.tempflag
= tempflag
;
5151 args
.thread
= thread
;
5152 args
.ignore_count
= ignore_count
;
5153 return catch_errors (do_captured_breakpoint
, &args
,
5154 NULL
, RETURN_MASK_ALL
);
5159 break_at_finish_at_depth_command_1 (char *arg
, int flag
, int from_tty
)
5161 struct frame_info
*frame
;
5162 CORE_ADDR low
, high
, selected_pc
= 0;
5163 char *extra_args
= NULL
;
5165 int extra_args_len
= 0, if_arg
= 0;
5168 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5171 if (default_breakpoint_valid
)
5173 if (deprecated_selected_frame
)
5175 selected_pc
= get_frame_pc (deprecated_selected_frame
);
5180 error ("No selected frame.");
5183 error ("No default breakpoint address now.");
5187 extra_args
= strchr (arg
, ' ');
5191 extra_args_len
= strlen (extra_args
);
5192 level_arg
= (char *) xmalloc (extra_args
- arg
);
5193 strncpy (level_arg
, arg
, extra_args
- arg
- 1);
5194 level_arg
[extra_args
- arg
- 1] = '\0';
5198 level_arg
= (char *) xmalloc (strlen (arg
) + 1);
5199 strcpy (level_arg
, arg
);
5202 frame
= parse_frame_specification (level_arg
);
5204 selected_pc
= get_frame_pc (frame
);
5211 extra_args_len
= strlen (arg
);
5216 if (find_pc_partial_function (selected_pc
, (char **) NULL
, &low
, &high
))
5220 addr_string
= xstrprintf ("*0x%s %s", paddr_nz (high
), extra_args
);
5222 addr_string
= xstrprintf ("*0x%s", paddr_nz (high
));
5223 break_command_1 (addr_string
, flag
, from_tty
);
5224 xfree (addr_string
);
5227 error ("No function contains the specified address");
5230 error ("Unable to set breakpoint at procedure exit");
5235 break_at_finish_command_1 (char *arg
, int flag
, int from_tty
)
5237 char *addr_string
, *break_string
, *beg_addr_string
;
5238 CORE_ADDR low
, high
;
5239 struct symtabs_and_lines sals
;
5240 struct symtab_and_line sal
;
5241 struct cleanup
*old_chain
;
5242 char *extra_args
= NULL
;
5243 int extra_args_len
= 0;
5247 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5249 if (default_breakpoint_valid
)
5251 if (deprecated_selected_frame
)
5253 addr_string
= xstrprintf ("*0x%s",
5254 paddr_nz (get_frame_pc (deprecated_selected_frame
)));
5259 error ("No selected frame.");
5262 error ("No default breakpoint address now.");
5266 addr_string
= (char *) xmalloc (strlen (arg
) + 1);
5267 strcpy (addr_string
, arg
);
5273 extra_args_len
= strlen (arg
);
5277 /* get the stuff after the function name or address */
5278 extra_args
= strchr (arg
, ' ');
5282 extra_args_len
= strlen (extra_args
);
5289 beg_addr_string
= addr_string
;
5290 sals
= decode_line_1 (&addr_string
, 1, (struct symtab
*) NULL
, 0,
5293 xfree (beg_addr_string
);
5294 old_chain
= make_cleanup (xfree
, sals
.sals
);
5295 for (i
= 0; (i
< sals
.nelts
); i
++)
5298 if (find_pc_partial_function (sal
.pc
, (char **) NULL
, &low
, &high
))
5302 break_string
= xstrprintf ("*0x%s %s", paddr_nz (high
),
5305 break_string
= xstrprintf ("*0x%s", paddr_nz (high
));
5306 break_command_1 (break_string
, flag
, from_tty
);
5307 xfree (break_string
);
5310 error ("No function contains the specified address");
5314 warning ("Multiple breakpoints were set.\n");
5315 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5317 do_cleanups (old_chain
);
5321 /* Helper function for break_command_1 and disassemble_command. */
5324 resolve_sal_pc (struct symtab_and_line
*sal
)
5328 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5330 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5331 error ("No line %d in file \"%s\".",
5332 sal
->line
, sal
->symtab
->filename
);
5336 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5338 struct blockvector
*bv
;
5343 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5346 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5347 sym
= block_function (b
);
5350 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5351 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5355 /* It really is worthwhile to have the section, so we'll just
5356 have to look harder. This case can be executed if we have
5357 line numbers but no functions (as can happen in assembly
5360 struct minimal_symbol
*msym
;
5362 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5364 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5371 break_command (char *arg
, int from_tty
)
5373 break_command_1 (arg
, 0, from_tty
);
5377 break_at_finish_command (char *arg
, int from_tty
)
5379 break_at_finish_command_1 (arg
, 0, from_tty
);
5383 break_at_finish_at_depth_command (char *arg
, int from_tty
)
5385 break_at_finish_at_depth_command_1 (arg
, 0, from_tty
);
5389 tbreak_command (char *arg
, int from_tty
)
5391 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5395 tbreak_at_finish_command (char *arg
, int from_tty
)
5397 break_at_finish_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5401 hbreak_command (char *arg
, int from_tty
)
5403 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5407 thbreak_command (char *arg
, int from_tty
)
5409 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5413 stop_command (char *arg
, int from_tty
)
5415 printf_filtered ("Specify the type of breakpoint to set.\n\
5416 Usage: stop in <function | address>\n\
5421 stopin_command (char *arg
, int from_tty
)
5425 if (arg
== (char *) NULL
)
5427 else if (*arg
!= '*')
5432 /* look for a ':'. If this is a line number specification, then
5433 say it is bad, otherwise, it should be an address or
5434 function/method name */
5435 while (*argptr
&& !hasColon
)
5437 hasColon
= (*argptr
== ':');
5442 badInput
= (*argptr
!= ':'); /* Not a class::method */
5444 badInput
= isdigit (*arg
); /* a simple line number */
5448 printf_filtered ("Usage: stop in <function | address>\n");
5450 break_command_1 (arg
, 0, from_tty
);
5454 stopat_command (char *arg
, int from_tty
)
5458 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5465 /* look for a ':'. If there is a '::' then get out, otherwise
5466 it is probably a line number. */
5467 while (*argptr
&& !hasColon
)
5469 hasColon
= (*argptr
== ':');
5474 badInput
= (*argptr
== ':'); /* we have class::method */
5476 badInput
= !isdigit (*arg
); /* not a line number */
5480 printf_filtered ("Usage: stop at <line>\n");
5482 break_command_1 (arg
, 0, from_tty
);
5485 /* accessflag: hw_write: watch write,
5486 hw_read: watch read,
5487 hw_access: watch access (read or write) */
5489 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5491 struct breakpoint
*b
;
5492 struct symtab_and_line sal
;
5493 struct expression
*exp
;
5494 struct block
*exp_valid_block
;
5495 struct value
*val
, *mark
;
5496 struct frame_info
*frame
;
5497 struct frame_info
*prev_frame
= NULL
;
5498 char *exp_start
= NULL
;
5499 char *exp_end
= NULL
;
5500 char *tok
, *end_tok
;
5502 char *cond_start
= NULL
;
5503 char *cond_end
= NULL
;
5504 struct expression
*cond
= NULL
;
5505 int i
, other_type_used
, target_resources_ok
= 0;
5506 enum bptype bp_type
;
5509 init_sal (&sal
); /* initialize to zeroes */
5511 /* Parse arguments. */
5512 innermost_block
= NULL
;
5514 exp
= parse_exp_1 (&arg
, 0, 0);
5516 exp_valid_block
= innermost_block
;
5517 mark
= value_mark ();
5518 val
= evaluate_expression (exp
);
5519 release_value (val
);
5520 if (VALUE_LAZY (val
))
5521 value_fetch_lazy (val
);
5524 while (*tok
== ' ' || *tok
== '\t')
5528 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5531 toklen
= end_tok
- tok
;
5532 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5534 tok
= cond_start
= end_tok
+ 1;
5535 cond
= parse_exp_1 (&tok
, 0, 0);
5539 error ("Junk at end of command.");
5541 if (accessflag
== hw_read
)
5542 bp_type
= bp_read_watchpoint
;
5543 else if (accessflag
== hw_access
)
5544 bp_type
= bp_access_watchpoint
;
5546 bp_type
= bp_hardware_watchpoint
;
5548 mem_cnt
= can_use_hardware_watchpoint (val
);
5549 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5550 error ("Expression cannot be implemented with read/access watchpoint.");
5553 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5554 target_resources_ok
=
5555 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5557 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5558 error ("Target does not support this type of hardware watchpoint.");
5560 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5561 error ("Target can only support one kind of HW watchpoint at a time.");
5564 #if defined(HPUXHPPA)
5565 /* On HP-UX if you set a h/w
5566 watchpoint before the "run" command, the inferior dies with a e.g.,
5567 SIGILL once you start it. I initially believed this was due to a
5568 bad interaction between page protection traps and the initial
5569 startup sequence by the dynamic linker.
5571 However, I tried avoiding that by having HP-UX's implementation of
5572 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5573 yet, which forced slow watches before a "run" or "attach", and it
5574 still fails somewhere in the startup code.
5576 Until I figure out what's happening, I'm disallowing watches altogether
5577 before the "run" or "attach" command. We'll tell the user they must
5578 set watches after getting the program started. */
5579 if (!target_has_execution
)
5581 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5584 #endif /* HPUXHPPA */
5586 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5587 watchpoint could not be set. */
5588 if (!mem_cnt
|| target_resources_ok
<= 0)
5589 bp_type
= bp_watchpoint
;
5591 /* Now set up the breakpoint. */
5592 b
= set_raw_breakpoint (sal
, bp_type
);
5593 set_breakpoint_count (breakpoint_count
+ 1);
5594 b
->number
= breakpoint_count
;
5595 b
->disposition
= disp_donttouch
;
5597 b
->exp_valid_block
= exp_valid_block
;
5598 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5602 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5606 frame
= block_innermost_frame (exp_valid_block
);
5609 prev_frame
= get_prev_frame (frame
);
5610 b
->watchpoint_frame
= get_frame_id (frame
);
5614 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5617 /* If the expression is "local", then set up a "watchpoint scope"
5618 breakpoint at the point where we've left the scope of the watchpoint
5620 if (innermost_block
)
5624 struct breakpoint
*scope_breakpoint
;
5625 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5626 bp_watchpoint_scope
);
5628 scope_breakpoint
->enable_state
= bp_enabled
;
5630 /* Automatically delete the breakpoint when it hits. */
5631 scope_breakpoint
->disposition
= disp_del
;
5633 /* Only break in the proper frame (help with recursion). */
5634 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5636 /* Set the address at which we will stop. */
5637 scope_breakpoint
->loc
->requested_address
5638 = get_frame_pc (prev_frame
);
5639 scope_breakpoint
->loc
->address
5640 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
);
5642 /* The scope breakpoint is related to the watchpoint. We
5643 will need to act on them together. */
5644 b
->related_breakpoint
= scope_breakpoint
;
5647 value_free_to_mark (mark
);
5651 /* Return count of locations need to be watched and can be handled
5652 in hardware. If the watchpoint can not be handled
5653 in hardware return zero. */
5655 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5656 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5657 ((BYTE_SIZE) <= (DEPRECATED_REGISTER_SIZE))
5660 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5661 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5662 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5666 can_use_hardware_watchpoint (struct value
*v
)
5668 int found_memory_cnt
= 0;
5669 struct value
*head
= v
;
5671 /* Did the user specifically forbid us to use hardware watchpoints? */
5672 if (!can_use_hw_watchpoints
)
5675 /* Make sure that the value of the expression depends only upon
5676 memory contents, and values computed from them within GDB. If we
5677 find any register references or function calls, we can't use a
5678 hardware watchpoint.
5680 The idea here is that evaluating an expression generates a series
5681 of values, one holding the value of every subexpression. (The
5682 expression a*b+c has five subexpressions: a, b, a*b, c, and
5683 a*b+c.) GDB's values hold almost enough information to establish
5684 the criteria given above --- they identify memory lvalues,
5685 register lvalues, computed values, etcetera. So we can evaluate
5686 the expression, and then scan the chain of values that leaves
5687 behind to decide whether we can detect any possible change to the
5688 expression's final value using only hardware watchpoints.
5690 However, I don't think that the values returned by inferior
5691 function calls are special in any way. So this function may not
5692 notice that an expression involving an inferior function call
5693 can't be watched with hardware watchpoints. FIXME. */
5694 for (; v
; v
= v
->next
)
5696 if (VALUE_LVAL (v
) == lval_memory
)
5699 /* A lazy memory lvalue is one that GDB never needed to fetch;
5700 we either just used its address (e.g., `a' in `a.b') or
5701 we never needed it at all (e.g., `a' in `a,b'). */
5705 /* Ahh, memory we actually used! Check if we can cover
5706 it with hardware watchpoints. */
5707 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
5709 /* We only watch structs and arrays if user asked for it
5710 explicitly, never if they just happen to appear in a
5711 middle of some value chain. */
5713 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5714 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5716 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
5717 int len
= TYPE_LENGTH (VALUE_TYPE (v
));
5719 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5726 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
5727 return 0; /* ??? What does this represent? */
5728 else if (v
->lval
== lval_register
)
5729 return 0; /* cannot watch a register with a HW watchpoint */
5732 /* The expression itself looks suitable for using a hardware
5733 watchpoint, but give the target machine a chance to reject it. */
5734 return found_memory_cnt
;
5738 watch_command_wrapper (char *arg
, int from_tty
)
5740 watch_command (arg
, from_tty
);
5744 watch_command (char *arg
, int from_tty
)
5746 watch_command_1 (arg
, hw_write
, from_tty
);
5750 rwatch_command_wrapper (char *arg
, int from_tty
)
5752 rwatch_command (arg
, from_tty
);
5756 rwatch_command (char *arg
, int from_tty
)
5758 watch_command_1 (arg
, hw_read
, from_tty
);
5762 awatch_command_wrapper (char *arg
, int from_tty
)
5764 awatch_command (arg
, from_tty
);
5768 awatch_command (char *arg
, int from_tty
)
5770 watch_command_1 (arg
, hw_access
, from_tty
);
5774 /* Helper routines for the until_command routine in infcmd.c. Here
5775 because it uses the mechanisms of breakpoints. */
5777 /* This function is called by fetch_inferior_event via the
5778 cmd_continuation pointer, to complete the until command. It takes
5779 care of cleaning up the temporary breakpoints set up by the until
5782 until_break_command_continuation (struct continuation_arg
*arg
)
5784 struct cleanup
*cleanups
;
5786 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5787 do_exec_cleanups (cleanups
);
5791 until_break_command (char *arg
, int from_tty
, int anywhere
)
5793 struct symtabs_and_lines sals
;
5794 struct symtab_and_line sal
;
5795 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
5796 struct breakpoint
*breakpoint
;
5797 struct cleanup
*old_chain
;
5798 struct continuation_arg
*arg1
;
5801 clear_proceed_status ();
5803 /* Set a breakpoint where the user wants it and at return from
5806 if (default_breakpoint_valid
)
5807 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5808 default_breakpoint_line
, (char ***) NULL
);
5810 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5811 0, (char ***) NULL
);
5813 if (sals
.nelts
!= 1)
5814 error ("Couldn't get information on specified line.");
5817 xfree (sals
.sals
); /* malloc'd, so freed */
5820 error ("Junk at end of arguments.");
5822 resolve_sal_pc (&sal
);
5825 /* If the user told us to continue until a specified location,
5826 we don't specify a frame at which we need to stop. */
5827 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
5829 /* Otherwise, specify the current frame, because we want to stop only
5830 at the very same frame. */
5831 breakpoint
= set_momentary_breakpoint (sal
,
5832 get_frame_id (deprecated_selected_frame
),
5835 if (!event_loop_p
|| !target_can_async_p ())
5836 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5838 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5840 /* If we are running asynchronously, and the target supports async
5841 execution, we are not waiting for the target to stop, in the call
5842 tp proceed, below. This means that we cannot delete the
5843 brekpoints until the target has actually stopped. The only place
5844 where we get a chance to do that is in fetch_inferior_event, so
5845 we must set things up for that. */
5847 if (event_loop_p
&& target_can_async_p ())
5849 /* In this case the arg for the continuation is just the point
5850 in the exec_cleanups chain from where to start doing
5851 cleanups, because all the continuation does is the cleanups in
5852 the exec_cleanup_chain. */
5854 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5856 arg1
->data
.pointer
= old_chain
;
5858 add_continuation (until_break_command_continuation
, arg1
);
5861 /* Keep within the current frame, or in frames called by the current
5865 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
5866 sal
.pc
= get_frame_pc (prev_frame
);
5867 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
5869 if (!event_loop_p
|| !target_can_async_p ())
5870 make_cleanup_delete_breakpoint (breakpoint
);
5872 make_exec_cleanup_delete_breakpoint (breakpoint
);
5875 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
5876 /* Do the cleanups now, anly if we are not running asynchronously,
5877 of if we are, but the target is still synchronous. */
5878 if (!event_loop_p
|| !target_can_async_p ())
5879 do_cleanups (old_chain
);
5883 /* These aren't used; I don't konw what they were for. */
5884 /* Set a breakpoint at the catch clause for NAME. */
5886 catch_breakpoint (char *name
)
5891 disable_catch_breakpoint (void)
5896 delete_catch_breakpoint (void)
5901 enable_catch_breakpoint (void)
5907 ep_skip_leading_whitespace (char **s
)
5909 if ((s
== NULL
) || (*s
== NULL
))
5911 while (isspace (**s
))
5915 /* This function examines a string, and attempts to find a token
5916 that might be an event name in the leading characters. If a
5917 possible match is found, a pointer to the last character of
5918 the token is returned. Else, NULL is returned. */
5921 ep_find_event_name_end (char *arg
)
5924 char *event_name_end
= NULL
;
5926 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5930 /* We break out of the loop when we find a token delimiter.
5931 Basically, we're looking for alphanumerics and underscores;
5932 anything else delimites the token. */
5935 if (!isalnum (*s
) && (*s
!= '_'))
5941 return event_name_end
;
5945 /* This function attempts to parse an optional "if <cond>" clause
5946 from the arg string. If one is not found, it returns NULL.
5948 Else, it returns a pointer to the condition string. (It does not
5949 attempt to evaluate the string against a particular block.) And,
5950 it updates arg to point to the first character following the parsed
5951 if clause in the arg string. */
5954 ep_parse_optional_if_clause (char **arg
)
5958 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
5961 /* Skip the "if" keyword. */
5964 /* Skip any extra leading whitespace, and record the start of the
5965 condition string. */
5966 ep_skip_leading_whitespace (arg
);
5969 /* Assume that the condition occupies the remainder of the arg string. */
5970 (*arg
) += strlen (cond_string
);
5975 /* This function attempts to parse an optional filename from the arg
5976 string. If one is not found, it returns NULL.
5978 Else, it returns a pointer to the parsed filename. (This function
5979 makes no attempt to verify that a file of that name exists, or is
5980 accessible.) And, it updates arg to point to the first character
5981 following the parsed filename in the arg string.
5983 Note that clients needing to preserve the returned filename for
5984 future access should copy it to their own buffers. */
5986 ep_parse_optional_filename (char **arg
)
5988 static char filename
[1024];
5993 if ((*arg_p
== '\0') || isspace (*arg_p
))
6011 /* Commands to deal with catching events, such as signals, exceptions,
6012 process start/exit, etc. */
6016 catch_fork
, catch_vfork
6020 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
6021 static void catch_fork_command_1 (catch_fork_kind fork_kind
,
6022 char *arg
, int tempflag
, int from_tty
);
6025 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6028 char *cond_string
= NULL
;
6030 ep_skip_leading_whitespace (&arg
);
6032 /* The allowed syntax is:
6034 catch [v]fork if <cond>
6036 First, check if there's an if clause. */
6037 cond_string
= ep_parse_optional_if_clause (&arg
);
6039 if ((*arg
!= '\0') && !isspace (*arg
))
6040 error ("Junk at end of arguments.");
6042 /* If this target supports it, create a fork or vfork catchpoint
6043 and enable reporting of such events. */
6047 create_fork_event_catchpoint (tempflag
, cond_string
);
6050 create_vfork_event_catchpoint (tempflag
, cond_string
);
6053 error ("unsupported or unknown fork kind; cannot catch it");
6059 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6061 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6063 char *cond_string
= NULL
;
6065 ep_skip_leading_whitespace (&arg
);
6067 /* The allowed syntax is:
6069 catch exec if <cond>
6071 First, check if there's an if clause. */
6072 cond_string
= ep_parse_optional_if_clause (&arg
);
6074 if ((*arg
!= '\0') && !isspace (*arg
))
6075 error ("Junk at end of arguments.");
6077 /* If this target supports it, create an exec catchpoint
6078 and enable reporting of such events. */
6079 create_exec_event_catchpoint (tempflag
, cond_string
);
6083 #if defined(SOLIB_ADD)
6085 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6087 char *dll_pathname
= NULL
;
6088 char *cond_string
= NULL
;
6090 ep_skip_leading_whitespace (&arg
);
6092 /* The allowed syntax is:
6094 catch load if <cond>
6095 catch load <filename>
6096 catch load <filename> if <cond>
6098 The user is not allowed to specify the <filename> after an
6101 We'll ignore the pathological case of a file named "if".
6103 First, check if there's an if clause. If so, then there
6104 cannot be a filename. */
6105 cond_string
= ep_parse_optional_if_clause (&arg
);
6107 /* If there was an if clause, then there cannot be a filename.
6108 Else, there might be a filename and an if clause. */
6109 if (cond_string
== NULL
)
6111 dll_pathname
= ep_parse_optional_filename (&arg
);
6112 ep_skip_leading_whitespace (&arg
);
6113 cond_string
= ep_parse_optional_if_clause (&arg
);
6116 if ((*arg
!= '\0') && !isspace (*arg
))
6117 error ("Junk at end of arguments.");
6119 /* Create a load breakpoint that only triggers when a load of
6120 the specified dll (or any dll, if no pathname was specified)
6122 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6123 dll_pathname
, cond_string
);
6127 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6129 char *dll_pathname
= NULL
;
6130 char *cond_string
= NULL
;
6132 ep_skip_leading_whitespace (&arg
);
6134 /* The allowed syntax is:
6136 catch unload if <cond>
6137 catch unload <filename>
6138 catch unload <filename> if <cond>
6140 The user is not allowed to specify the <filename> after an
6143 We'll ignore the pathological case of a file named "if".
6145 First, check if there's an if clause. If so, then there
6146 cannot be a filename. */
6147 cond_string
= ep_parse_optional_if_clause (&arg
);
6149 /* If there was an if clause, then there cannot be a filename.
6150 Else, there might be a filename and an if clause. */
6151 if (cond_string
== NULL
)
6153 dll_pathname
= ep_parse_optional_filename (&arg
);
6154 ep_skip_leading_whitespace (&arg
);
6155 cond_string
= ep_parse_optional_if_clause (&arg
);
6158 if ((*arg
!= '\0') && !isspace (*arg
))
6159 error ("Junk at end of arguments.");
6161 /* Create an unload breakpoint that only triggers when an unload of
6162 the specified dll (or any dll, if no pathname was specified)
6164 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6165 dll_pathname
, cond_string
);
6167 #endif /* SOLIB_ADD */
6169 /* Commands to deal with catching exceptions. */
6171 /* Set a breakpoint at the specified callback routine for an
6172 exception event callback */
6175 create_exception_catchpoint (int tempflag
, char *cond_string
,
6176 enum exception_event_kind ex_event
,
6177 struct symtab_and_line
*sal
)
6179 struct breakpoint
*b
;
6180 int thread
= -1; /* All threads. */
6183 if (!sal
) /* no exception support? */
6188 case EX_EVENT_THROW
:
6189 bptype
= bp_catch_throw
;
6191 case EX_EVENT_CATCH
:
6192 bptype
= bp_catch_catch
;
6194 default: /* error condition */
6195 error ("Internal error -- invalid catchpoint kind");
6198 b
= set_raw_breakpoint (*sal
, bptype
);
6199 set_breakpoint_count (breakpoint_count
+ 1);
6200 b
->number
= breakpoint_count
;
6202 b
->cond_string
= (cond_string
== NULL
) ?
6203 NULL
: savestring (cond_string
, strlen (cond_string
));
6205 b
->addr_string
= NULL
;
6206 b
->enable_state
= bp_enabled
;
6207 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6211 static enum print_stop_action
6212 print_exception_catchpoint (struct breakpoint
*b
)
6214 annotate_catchpoint (b
->number
);
6216 if (strstr (b
->addr_string
, "throw") != NULL
)
6217 printf_filtered ("\nCatchpoint %d (exception thrown)\n",
6220 printf_filtered ("\nCatchpoint %d (exception caught)\n",
6223 return PRINT_SRC_AND_LOC
;
6227 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6232 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6235 *last_addr
= b
->loc
->address
;
6236 if (strstr (b
->addr_string
, "throw") != NULL
)
6237 ui_out_field_string (uiout
, "what", "exception throw");
6239 ui_out_field_string (uiout
, "what", "exception catch");
6243 print_mention_exception_catchpoint (struct breakpoint
*b
)
6245 if (strstr (b
->addr_string
, "throw") != NULL
)
6246 printf_filtered ("Catchpoint %d (throw)", b
->number
);
6248 printf_filtered ("Catchpoint %d (catch)", b
->number
);
6251 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6252 print_exception_catchpoint
,
6253 print_one_exception_catchpoint
,
6254 print_mention_exception_catchpoint
6258 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6259 enum exception_event_kind ex_event
, int from_tty
)
6261 char *trigger_func_name
, *nameptr
;
6262 struct symtabs_and_lines sals
;
6263 struct breakpoint
*b
;
6265 if (ex_event
== EX_EVENT_CATCH
)
6266 trigger_func_name
= xstrdup ("__cxa_begin_catch");
6268 trigger_func_name
= xstrdup ("__cxa_throw");
6270 nameptr
= trigger_func_name
;
6271 sals
= decode_line_1 (&nameptr
, 1, NULL
, 0, NULL
);
6272 if (sals
.nelts
== 0)
6274 xfree (trigger_func_name
);
6278 b
= set_raw_breakpoint (sals
.sals
[0], bp_breakpoint
);
6279 set_breakpoint_count (breakpoint_count
+ 1);
6280 b
->number
= breakpoint_count
;
6282 b
->cond_string
= (cond_string
== NULL
) ?
6283 NULL
: savestring (cond_string
, strlen (cond_string
));
6285 b
->addr_string
= trigger_func_name
;
6286 b
->enable_state
= bp_enabled
;
6287 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6288 b
->ops
= &gnu_v3_exception_catchpoint_ops
;
6295 /* Deal with "catch catch" and "catch throw" commands */
6298 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6299 int tempflag
, int from_tty
)
6301 char *cond_string
= NULL
;
6302 struct symtab_and_line
*sal
= NULL
;
6304 ep_skip_leading_whitespace (&arg
);
6306 cond_string
= ep_parse_optional_if_clause (&arg
);
6308 if ((*arg
!= '\0') && !isspace (*arg
))
6309 error ("Junk at end of arguments.");
6311 if ((ex_event
!= EX_EVENT_THROW
) &&
6312 (ex_event
!= EX_EVENT_CATCH
))
6313 error ("Unsupported or unknown exception event; cannot catch it");
6315 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6318 /* See if we can find a callback routine */
6319 sal
= target_enable_exception_callback (ex_event
, 1);
6323 /* We have callbacks from the runtime system for exceptions.
6324 Set a breakpoint on the sal found, if no errors */
6325 if (sal
!= (struct symtab_and_line
*) -1)
6326 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6328 return; /* something went wrong with setting up callbacks */
6331 warning ("Unsupported with this platform/compiler combination.");
6334 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6335 inside a catch_errors */
6338 cover_target_enable_exception_callback (void *arg
)
6340 args_for_catchpoint_enable
*args
= arg
;
6341 struct symtab_and_line
*sal
;
6342 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6345 else if (sal
== (struct symtab_and_line
*) -1)
6348 return 1; /*is valid */
6352 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6355 /* The first argument may be an event name, such as "start" or "load".
6356 If so, then handle it as such. If it doesn't match an event name,
6357 then attempt to interpret it as an exception name. (This latter is
6358 the v4.16-and-earlier GDB meaning of the "catch" command.)
6360 First, try to find the bounds of what might be an event name. */
6361 char *arg1_start
= arg
;
6365 if (arg1_start
== NULL
)
6367 /* Old behaviour was to use pre-v-4.16 syntax */
6368 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6370 /* Now, this is not allowed */
6371 error ("Catch requires an event name.");
6374 arg1_end
= ep_find_event_name_end (arg1_start
);
6375 if (arg1_end
== NULL
)
6376 error ("catch requires an event");
6377 arg1_length
= arg1_end
+ 1 - arg1_start
;
6379 /* Try to match what we found against known event names. */
6380 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6382 error ("Catch of signal not yet implemented");
6384 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6386 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6387 tempflag
, from_tty
);
6389 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6391 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6392 tempflag
, from_tty
);
6394 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6396 error ("Catch of thread_start not yet implemented");
6398 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6400 error ("Catch of thread_exit not yet implemented");
6402 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6404 error ("Catch of thread_join not yet implemented");
6406 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6408 error ("Catch of start not yet implemented");
6410 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6412 error ("Catch of exit not yet implemented");
6414 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6416 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6417 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6419 error ("Catch of fork not yet implemented");
6422 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6424 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6425 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6427 error ("Catch of vfork not yet implemented");
6430 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6432 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6433 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6435 error ("Catch of exec not yet implemented");
6438 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6440 #if defined(SOLIB_ADD)
6441 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6443 error ("Catch of load not implemented");
6446 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6448 #if defined(SOLIB_ADD)
6449 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6451 error ("Catch of load not implemented");
6454 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6456 error ("Catch of stop not yet implemented");
6459 /* This doesn't appear to be an event name */
6463 /* Pre-v.4.16 behaviour was to treat the argument
6464 as the name of an exception */
6465 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6466 /* Now this is not allowed */
6467 error ("Unknown event kind specified for catch");
6472 /* Used by the gui, could be made a worker for other things. */
6475 set_breakpoint_sal (struct symtab_and_line sal
)
6477 struct breakpoint
*b
;
6478 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6479 set_breakpoint_count (breakpoint_count
+ 1);
6480 b
->number
= breakpoint_count
;
6487 /* These aren't used; I don't know what they were for. */
6488 /* Disable breakpoints on all catch clauses described in ARGS. */
6490 disable_catch (char *args
)
6492 /* Map the disable command to catch clauses described in ARGS. */
6495 /* Enable breakpoints on all catch clauses described in ARGS. */
6497 enable_catch (char *args
)
6499 /* Map the disable command to catch clauses described in ARGS. */
6502 /* Delete breakpoints on all catch clauses in the active scope. */
6504 delete_catch (char *args
)
6506 /* Map the delete command to catch clauses described in ARGS. */
6511 catch_command (char *arg
, int from_tty
)
6513 catch_command_1 (arg
, 0, from_tty
);
6518 tcatch_command (char *arg
, int from_tty
)
6520 catch_command_1 (arg
, 1, from_tty
);
6523 /* Delete breakpoints by address or line. */
6526 clear_command (char *arg
, int from_tty
)
6528 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6530 struct symtabs_and_lines sals
;
6531 struct symtab_and_line sal
;
6536 sals
= decode_line_spec (arg
, 1);
6541 sals
.sals
= (struct symtab_and_line
*)
6542 xmalloc (sizeof (struct symtab_and_line
));
6543 make_cleanup (xfree
, sals
.sals
);
6544 init_sal (&sal
); /* initialize to zeroes */
6545 sal
.line
= default_breakpoint_line
;
6546 sal
.symtab
= default_breakpoint_symtab
;
6547 sal
.pc
= default_breakpoint_address
;
6548 if (sal
.symtab
== 0)
6549 error ("No source file specified.");
6557 /* For each line spec given, delete bps which correspond
6558 to it. Do it in two passes, solely to preserve the current
6559 behavior that from_tty is forced true if we delete more than
6563 for (i
= 0; i
< sals
.nelts
; i
++)
6565 /* If exact pc given, clear bpts at that pc.
6566 If line given (pc == 0), clear all bpts on specified line.
6567 If defaulting, clear all bpts on default line
6570 defaulting sal.pc != 0 tests to do
6575 1 0 <can't happen> */
6580 /* Find all matching breakpoints, remove them from the
6581 breakpoint chain, and add them to the 'found' chain. */
6582 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6584 /* Are we going to delete b? */
6585 if (b
->type
!= bp_none
6586 && b
->type
!= bp_watchpoint
6587 && b
->type
!= bp_hardware_watchpoint
6588 && b
->type
!= bp_read_watchpoint
6589 && b
->type
!= bp_access_watchpoint
6590 /* Not if b is a watchpoint of any sort... */
6591 && (((sal
.pc
&& (b
->loc
->address
== sal
.pc
))
6592 && (!section_is_overlay (b
->loc
->section
)
6593 || b
->loc
->section
== sal
.section
))
6594 /* Yes, if sal.pc matches b (modulo overlays). */
6595 || ((default_match
|| (0 == sal
.pc
))
6596 && b
->source_file
!= NULL
6597 && sal
.symtab
!= NULL
6598 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6599 && b
->line_number
== sal
.line
)))
6600 /* Yes, if sal source file and line matches b. */
6602 /* Remove it from breakpoint_chain... */
6603 if (b
== breakpoint_chain
)
6605 /* b is at the head of the list */
6606 breakpoint_chain
= b
->next
;
6610 prev
->next
= b
->next
;
6612 /* And add it to 'found' chain. */
6618 /* Keep b, and keep a pointer to it. */
6623 /* Now go thru the 'found' chain and delete them. */
6627 error ("No breakpoint at %s.", arg
);
6629 error ("No breakpoint at this line.");
6633 from_tty
= 1; /* Always report if deleted more than one */
6635 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6636 breakpoints_changed ();
6640 printf_unfiltered ("%d ", found
->number
);
6642 delete_breakpoint (found
);
6646 putchar_unfiltered ('\n');
6649 /* Delete breakpoint in BS if they are `delete' breakpoints and
6650 all breakpoints that are marked for deletion, whether hit or not.
6651 This is called after any breakpoint is hit, or after errors. */
6654 breakpoint_auto_delete (bpstat bs
)
6656 struct breakpoint
*b
, *temp
;
6658 for (; bs
; bs
= bs
->next
)
6659 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6661 delete_breakpoint (bs
->breakpoint_at
);
6663 ALL_BREAKPOINTS_SAFE (b
, temp
)
6665 if (b
->disposition
== disp_del_at_next_stop
)
6666 delete_breakpoint (b
);
6670 /* Delete a breakpoint and clean up all traces of it in the data
6674 delete_breakpoint (struct breakpoint
*bpt
)
6676 struct breakpoint
*b
;
6678 struct bp_location
*loc
;
6681 error ("Internal error (attempted to delete a NULL breakpoint)");
6684 /* Has this bp already been deleted? This can happen because multiple
6685 lists can hold pointers to bp's. bpstat lists are especial culprits.
6687 One example of this happening is a watchpoint's scope bp. When the
6688 scope bp triggers, we notice that the watchpoint is out of scope, and
6689 delete it. We also delete its scope bp. But the scope bp is marked
6690 "auto-deleting", and is already on a bpstat. That bpstat is then
6691 checked for auto-deleting bp's, which are deleted.
6693 A real solution to this problem might involve reference counts in bp's,
6694 and/or giving them pointers back to their referencing bpstat's, and
6695 teaching delete_breakpoint to only free a bp's storage when no more
6696 references were extent. A cheaper bandaid was chosen. */
6697 if (bpt
->type
== bp_none
)
6700 if (delete_breakpoint_hook
)
6701 delete_breakpoint_hook (bpt
);
6702 breakpoint_delete_event (bpt
->number
);
6704 if (bpt
->loc
->inserted
)
6705 remove_breakpoint (bpt
->loc
, mark_inserted
);
6707 if (breakpoint_chain
== bpt
)
6708 breakpoint_chain
= bpt
->next
;
6710 if (bp_location_chain
== bpt
->loc
)
6711 bp_location_chain
= bpt
->loc
->next
;
6713 /* If we have callback-style exception catchpoints, don't go through
6714 the adjustments to the C++ runtime library etc. if the inferior
6715 isn't actually running. target_enable_exception_callback for a
6716 null target ops vector gives an undesirable error message, so we
6717 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6718 exceptions are supported in this way, it's OK for now. FIXME */
6719 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6721 /* Format possible error msg */
6722 char *message
= xstrprintf ("Error in deleting catchpoint %d:\n",
6724 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
6725 args_for_catchpoint_enable args
;
6726 args
.kind
= bpt
->type
== bp_catch_catch
?
6727 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6729 catch_errors (cover_target_enable_exception_callback
, &args
,
6730 message
, RETURN_MASK_ALL
);
6731 do_cleanups (cleanups
);
6738 b
->next
= bpt
->next
;
6742 ALL_BP_LOCATIONS (loc
)
6743 if (loc
->next
== bpt
->loc
)
6745 loc
->next
= bpt
->loc
->next
;
6749 check_duplicates (bpt
);
6750 /* If this breakpoint was inserted, and there is another breakpoint
6751 at the same address, we need to insert the other breakpoint. */
6752 if (bpt
->loc
->inserted
6753 && bpt
->type
!= bp_hardware_watchpoint
6754 && bpt
->type
!= bp_read_watchpoint
6755 && bpt
->type
!= bp_access_watchpoint
6756 && bpt
->type
!= bp_catch_fork
6757 && bpt
->type
!= bp_catch_vfork
6758 && bpt
->type
!= bp_catch_exec
)
6761 if (b
->loc
->address
== bpt
->loc
->address
6762 && b
->loc
->section
== bpt
->loc
->section
6763 && !b
->loc
->duplicate
6764 && b
->enable_state
!= bp_disabled
6765 && b
->enable_state
!= bp_shlib_disabled
6766 && b
->enable_state
!= bp_call_disabled
)
6770 /* We should never reach this point if there is a permanent
6771 breakpoint at the same address as the one being deleted.
6772 If there is a permanent breakpoint somewhere, it should
6773 always be the only one inserted. */
6774 if (b
->enable_state
== bp_permanent
)
6775 internal_error (__FILE__
, __LINE__
,
6776 "another breakpoint was inserted on top of "
6777 "a permanent breakpoint");
6779 if (b
->type
== bp_hardware_breakpoint
)
6780 val
= target_insert_hw_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6782 val
= target_insert_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6784 /* If there was an error in the insert, print a message, then stop execution. */
6787 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6788 make_cleanup_ui_file_delete (tmp_error_stream
);
6791 if (b
->type
== bp_hardware_breakpoint
)
6793 fprintf_unfiltered (tmp_error_stream
,
6794 "Cannot insert hardware breakpoint %d.\n"
6795 "You may have requested too many hardware breakpoints.\n",
6800 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6801 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6802 print_address_numeric (b
->loc
->address
, 1, tmp_error_stream
);
6803 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6804 safe_strerror (val
));
6807 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6808 target_terminal_ours_for_output ();
6809 error_stream(tmp_error_stream
);
6812 b
->loc
->inserted
= 1;
6816 free_command_lines (&bpt
->commands
);
6819 if (bpt
->cond_string
!= NULL
)
6820 xfree (bpt
->cond_string
);
6821 if (bpt
->addr_string
!= NULL
)
6822 xfree (bpt
->addr_string
);
6823 if (bpt
->exp
!= NULL
)
6825 if (bpt
->exp_string
!= NULL
)
6826 xfree (bpt
->exp_string
);
6827 if (bpt
->val
!= NULL
)
6828 value_free (bpt
->val
);
6829 if (bpt
->source_file
!= NULL
)
6830 xfree (bpt
->source_file
);
6831 if (bpt
->dll_pathname
!= NULL
)
6832 xfree (bpt
->dll_pathname
);
6833 if (bpt
->triggered_dll_pathname
!= NULL
)
6834 xfree (bpt
->triggered_dll_pathname
);
6835 if (bpt
->exec_pathname
!= NULL
)
6836 xfree (bpt
->exec_pathname
);
6838 /* Be sure no bpstat's are pointing at it after it's been freed. */
6839 /* FIXME, how can we find all bpstat's?
6840 We just check stop_bpstat for now. */
6841 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6842 if (bs
->breakpoint_at
== bpt
)
6844 bs
->breakpoint_at
= NULL
;
6846 /* bs->commands will be freed later. */
6848 /* On the chance that someone will soon try again to delete this same
6849 bp, we mark it as deleted before freeing its storage. */
6850 bpt
->type
= bp_none
;
6857 do_delete_breakpoint_cleanup (void *b
)
6859 delete_breakpoint (b
);
6863 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6865 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6869 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6871 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6875 delete_command (char *arg
, int from_tty
)
6877 struct breakpoint
*b
, *temp
;
6883 int breaks_to_delete
= 0;
6885 /* Delete all breakpoints if no argument.
6886 Do not delete internal or call-dummy breakpoints, these
6887 have to be deleted with an explicit breakpoint number argument. */
6890 if (b
->type
!= bp_call_dummy
&&
6891 b
->type
!= bp_shlib_event
&&
6892 b
->type
!= bp_thread_event
&&
6893 b
->type
!= bp_overlay_event
&&
6895 breaks_to_delete
= 1;
6898 /* Ask user only if there are some breakpoints to delete. */
6900 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
6902 ALL_BREAKPOINTS_SAFE (b
, temp
)
6904 if (b
->type
!= bp_call_dummy
&&
6905 b
->type
!= bp_shlib_event
&&
6906 b
->type
!= bp_thread_event
&&
6907 b
->type
!= bp_overlay_event
&&
6909 delete_breakpoint (b
);
6914 map_breakpoint_numbers (arg
, delete_breakpoint
);
6917 /* Reset a breakpoint given it's struct breakpoint * BINT.
6918 The value we return ends up being the return value from catch_errors.
6919 Unused in this case. */
6922 breakpoint_re_set_one (void *bint
)
6924 /* get past catch_errs */
6925 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6928 struct symtabs_and_lines sals
;
6930 enum enable_state save_enable
;
6935 warning ("attempted to reset apparently deleted breakpoint #%d?",
6939 case bp_hardware_breakpoint
:
6941 case bp_catch_unload
:
6942 if (b
->addr_string
== NULL
)
6944 /* Anything without a string can't be re-set. */
6945 delete_breakpoint (b
);
6948 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6950 ``And a hack it is, although Apple's Darwin version of GDB
6951 contains an almost identical hack to implement a "future
6952 break" command. It seems to work in many real world cases,
6953 but it is easy to come up with a test case where the patch
6954 doesn't help at all.''
6956 ``It seems that the way GDB implements breakpoints - in -
6957 shared - libraries was designed for a.out shared library
6958 systems (SunOS 4) where shared libraries were loaded at a
6959 fixed address in memory. Since ELF shared libraries can (and
6960 will) be loaded at any address in memory, things break.
6961 Fixing this is not trivial. Therefore, I'm not sure whether
6962 we should add this hack to the branch only. I cannot
6963 guarantee that things will be fixed on the trunk in the near
6966 In case we have a problem, disable this breakpoint. We'll
6967 restore its status if we succeed. Don't disable a
6968 shlib_disabled breakpoint though. There's a fair chance we
6969 can't re-set it if the shared library it's in hasn't been
6971 save_enable
= b
->enable_state
;
6972 if (b
->enable_state
!= bp_shlib_disabled
)
6973 b
->enable_state
= bp_disabled
;
6975 set_language (b
->language
);
6976 input_radix
= b
->input_radix
;
6978 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
);
6979 for (i
= 0; i
< sals
.nelts
; i
++)
6981 resolve_sal_pc (&sals
.sals
[i
]);
6983 /* Reparse conditions, they might contain references to the
6985 if (b
->cond_string
!= NULL
)
6990 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
6993 /* We need to re-set the breakpoint if the address changes... */
6994 if (b
->loc
->address
!= sals
.sals
[i
].pc
6995 /* ...or new and old breakpoints both have source files, and
6996 the source file name or the line number changes... */
6997 || (b
->source_file
!= NULL
6998 && sals
.sals
[i
].symtab
!= NULL
6999 && (strcmp (b
->source_file
, sals
.sals
[i
].symtab
->filename
) != 0
7000 || b
->line_number
!= sals
.sals
[i
].line
)
7002 /* ...or we switch between having a source file and not having
7004 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
7007 if (b
->source_file
!= NULL
)
7008 xfree (b
->source_file
);
7009 if (sals
.sals
[i
].symtab
== NULL
)
7010 b
->source_file
= NULL
;
7013 savestring (sals
.sals
[i
].symtab
->filename
,
7014 strlen (sals
.sals
[i
].symtab
->filename
));
7015 b
->line_number
= sals
.sals
[i
].line
;
7016 b
->loc
->requested_address
= sals
.sals
[i
].pc
;
7018 = adjust_breakpoint_address (b
->loc
->requested_address
);
7020 /* Used to check for duplicates here, but that can
7021 cause trouble, as it doesn't check for disabled
7026 /* Might be better to do this just once per breakpoint_re_set,
7027 rather than once for every breakpoint. */
7028 breakpoints_changed ();
7030 b
->loc
->section
= sals
.sals
[i
].section
;
7031 b
->enable_state
= save_enable
; /* Restore it, this worked. */
7034 /* Now that this is re-enabled, check_duplicates
7036 check_duplicates (b
);
7043 case bp_hardware_watchpoint
:
7044 case bp_read_watchpoint
:
7045 case bp_access_watchpoint
:
7046 innermost_block
= NULL
;
7047 /* The issue arises of what context to evaluate this in. The
7048 same one as when it was set, but what does that mean when
7049 symbols have been re-read? We could save the filename and
7050 functionname, but if the context is more local than that, the
7051 best we could do would be something like how many levels deep
7052 and which index at that particular level, but that's going to
7053 be less stable than filenames or function names. */
7055 /* So for now, just use a global context. */
7058 b
->exp
= parse_expression (b
->exp_string
);
7059 b
->exp_valid_block
= innermost_block
;
7060 mark
= value_mark ();
7062 value_free (b
->val
);
7063 b
->val
= evaluate_expression (b
->exp
);
7064 release_value (b
->val
);
7065 if (VALUE_LAZY (b
->val
) && b
->enable_state
== bp_enabled
)
7066 value_fetch_lazy (b
->val
);
7068 if (b
->cond_string
!= NULL
)
7073 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7075 if (b
->enable_state
== bp_enabled
)
7077 value_free_to_mark (mark
);
7079 case bp_catch_catch
:
7080 case bp_catch_throw
:
7082 /* We needn't really do anything to reset these, since the mask
7083 that requests them is unaffected by e.g., new libraries being
7086 case bp_catch_vfork
:
7091 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
7093 /* Delete longjmp and overlay event breakpoints; they will be
7094 reset later by breakpoint_re_set. */
7096 case bp_longjmp_resume
:
7097 case bp_overlay_event
:
7098 delete_breakpoint (b
);
7101 /* This breakpoint is special, it's set up when the inferior
7102 starts and we really don't want to touch it. */
7103 case bp_shlib_event
:
7105 /* Like bp_shlib_event, this breakpoint type is special.
7106 Once it is set up, we do not want to touch it. */
7107 case bp_thread_event
:
7109 /* Keep temporary breakpoints, which can be encountered when we step
7110 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7111 Otherwise these should have been blown away via the cleanup chain
7112 or by breakpoint_init_inferior when we rerun the executable. */
7115 case bp_watchpoint_scope
:
7117 case bp_step_resume
:
7124 /* Re-set all breakpoints after symbols have been re-loaded. */
7126 breakpoint_re_set (void)
7128 struct breakpoint
*b
, *temp
;
7129 enum language save_language
;
7130 int save_input_radix
;
7132 save_language
= current_language
->la_language
;
7133 save_input_radix
= input_radix
;
7134 ALL_BREAKPOINTS_SAFE (b
, temp
)
7136 /* Format possible error msg */
7137 char *message
= xstrprintf ("Error in re-setting breakpoint %d:\n",
7139 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7140 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7141 do_cleanups (cleanups
);
7143 set_language (save_language
);
7144 input_radix
= save_input_radix
;
7146 if (GET_LONGJMP_TARGET_P ())
7148 create_longjmp_breakpoint ("longjmp");
7149 create_longjmp_breakpoint ("_longjmp");
7150 create_longjmp_breakpoint ("siglongjmp");
7151 create_longjmp_breakpoint ("_siglongjmp");
7152 create_longjmp_breakpoint (NULL
);
7155 create_overlay_event_breakpoint ("_ovly_debug_event");
7158 /* Reset the thread number of this breakpoint:
7160 - If the breakpoint is for all threads, leave it as-is.
7161 - Else, reset it to the current thread for inferior_ptid. */
7163 breakpoint_re_set_thread (struct breakpoint
*b
)
7165 if (b
->thread
!= -1)
7167 if (in_thread_list (inferior_ptid
))
7168 b
->thread
= pid_to_thread_id (inferior_ptid
);
7172 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7173 If from_tty is nonzero, it prints a message to that effect,
7174 which ends with a period (no newline). */
7177 set_ignore_count (int bptnum
, int count
, int from_tty
)
7179 struct breakpoint
*b
;
7185 if (b
->number
== bptnum
)
7187 b
->ignore_count
= count
;
7191 printf_filtered ("Will stop next time breakpoint %d is reached.",
7193 else if (count
== 1)
7194 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7197 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7200 breakpoints_changed ();
7201 breakpoint_modify_event (b
->number
);
7205 error ("No breakpoint number %d.", bptnum
);
7208 /* Clear the ignore counts of all breakpoints. */
7210 breakpoint_clear_ignore_counts (void)
7212 struct breakpoint
*b
;
7215 b
->ignore_count
= 0;
7218 /* Command to set ignore-count of breakpoint N to COUNT. */
7221 ignore_command (char *args
, int from_tty
)
7227 error_no_arg ("a breakpoint number");
7229 num
= get_number (&p
);
7231 error ("bad breakpoint number: '%s'", args
);
7233 error ("Second argument (specified ignore-count) is missing.");
7235 set_ignore_count (num
,
7236 longest_to_int (value_as_long (parse_and_eval (p
))),
7239 printf_filtered ("\n");
7242 /* Call FUNCTION on each of the breakpoints
7243 whose numbers are given in ARGS. */
7246 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7251 struct breakpoint
*b
, *tmp
;
7255 error_no_arg ("one or more breakpoint numbers");
7262 num
= get_number_or_range (&p1
);
7265 warning ("bad breakpoint number at or near '%s'", p
);
7269 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7270 if (b
->number
== num
)
7272 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7275 if (related_breakpoint
)
7276 function (related_breakpoint
);
7280 printf_unfiltered ("No breakpoint number %d.\n", num
);
7286 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7287 If from_tty is nonzero, it prints a message to that effect,
7288 which ends with a period (no newline). */
7291 disable_breakpoint (struct breakpoint
*bpt
)
7293 /* Never disable a watchpoint scope breakpoint; we want to
7294 hit them when we leave scope so we can delete both the
7295 watchpoint and its scope breakpoint at that time. */
7296 if (bpt
->type
== bp_watchpoint_scope
)
7299 /* You can't disable permanent breakpoints. */
7300 if (bpt
->enable_state
== bp_permanent
)
7303 bpt
->enable_state
= bp_disabled
;
7305 check_duplicates (bpt
);
7307 if (modify_breakpoint_hook
)
7308 modify_breakpoint_hook (bpt
);
7309 breakpoint_modify_event (bpt
->number
);
7313 disable_command (char *args
, int from_tty
)
7315 struct breakpoint
*bpt
;
7317 ALL_BREAKPOINTS (bpt
)
7321 warning ("attempted to disable apparently deleted breakpoint #%d?",
7326 case bp_catch_unload
:
7328 case bp_catch_vfork
:
7330 case bp_catch_catch
:
7331 case bp_catch_throw
:
7332 case bp_hardware_breakpoint
:
7334 case bp_hardware_watchpoint
:
7335 case bp_read_watchpoint
:
7336 case bp_access_watchpoint
:
7337 disable_breakpoint (bpt
);
7342 map_breakpoint_numbers (args
, disable_breakpoint
);
7346 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7348 struct frame_info
*save_selected_frame
= NULL
;
7349 int save_selected_frame_level
= -1;
7350 int target_resources_ok
, other_type_used
;
7353 if (bpt
->type
== bp_hardware_breakpoint
)
7356 i
= hw_breakpoint_used_count ();
7357 target_resources_ok
=
7358 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7360 if (target_resources_ok
== 0)
7361 error ("No hardware breakpoint support in the target.");
7362 else if (target_resources_ok
< 0)
7363 error ("Hardware breakpoints used exceeds limit.");
7366 if (bpt
->enable_state
!= bp_permanent
)
7367 bpt
->enable_state
= bp_enabled
;
7368 bpt
->disposition
= disposition
;
7369 check_duplicates (bpt
);
7370 breakpoints_changed ();
7372 if (bpt
->type
== bp_watchpoint
||
7373 bpt
->type
== bp_hardware_watchpoint
||
7374 bpt
->type
== bp_read_watchpoint
||
7375 bpt
->type
== bp_access_watchpoint
)
7377 if (bpt
->exp_valid_block
!= NULL
)
7379 struct frame_info
*fr
=
7380 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7384 Cannot enable watchpoint %d because the block in which its expression\n\
7385 is valid is not currently in scope.\n", bpt
->number
);
7386 bpt
->enable_state
= bp_disabled
;
7390 save_selected_frame
= deprecated_selected_frame
;
7391 save_selected_frame_level
= frame_relative_level (deprecated_selected_frame
);
7395 value_free (bpt
->val
);
7396 mark
= value_mark ();
7397 bpt
->val
= evaluate_expression (bpt
->exp
);
7398 release_value (bpt
->val
);
7399 if (VALUE_LAZY (bpt
->val
))
7400 value_fetch_lazy (bpt
->val
);
7402 if (bpt
->type
== bp_hardware_watchpoint
||
7403 bpt
->type
== bp_read_watchpoint
||
7404 bpt
->type
== bp_access_watchpoint
)
7406 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7407 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7409 /* Hack around 'unused var' error for some targets here */
7411 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7412 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7413 /* we can consider of type is bp_hardware_watchpoint, convert to
7414 bp_watchpoint in the following condition */
7415 if (target_resources_ok
< 0)
7418 Cannot enable watchpoint %d because target watch resources\n\
7419 have been allocated for other watchpoints.\n", bpt
->number
);
7420 bpt
->enable_state
= bp_disabled
;
7421 value_free_to_mark (mark
);
7426 if (save_selected_frame_level
>= 0)
7427 select_frame (save_selected_frame
);
7428 value_free_to_mark (mark
);
7430 if (modify_breakpoint_hook
)
7431 modify_breakpoint_hook (bpt
);
7432 breakpoint_modify_event (bpt
->number
);
7436 enable_breakpoint (struct breakpoint
*bpt
)
7438 do_enable_breakpoint (bpt
, bpt
->disposition
);
7441 /* The enable command enables the specified breakpoints (or all defined
7442 breakpoints) so they once again become (or continue to be) effective
7443 in stopping the inferior. */
7446 enable_command (char *args
, int from_tty
)
7448 struct breakpoint
*bpt
;
7450 ALL_BREAKPOINTS (bpt
)
7454 warning ("attempted to enable apparently deleted breakpoint #%d?",
7459 case bp_catch_unload
:
7461 case bp_catch_vfork
:
7463 case bp_catch_catch
:
7464 case bp_catch_throw
:
7465 case bp_hardware_breakpoint
:
7467 case bp_hardware_watchpoint
:
7468 case bp_read_watchpoint
:
7469 case bp_access_watchpoint
:
7470 enable_breakpoint (bpt
);
7475 map_breakpoint_numbers (args
, enable_breakpoint
);
7479 enable_once_breakpoint (struct breakpoint
*bpt
)
7481 do_enable_breakpoint (bpt
, disp_disable
);
7485 enable_once_command (char *args
, int from_tty
)
7487 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7491 enable_delete_breakpoint (struct breakpoint
*bpt
)
7493 do_enable_breakpoint (bpt
, disp_del
);
7497 enable_delete_command (char *args
, int from_tty
)
7499 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7502 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7504 struct symtabs_and_lines
7505 decode_line_spec_1 (char *string
, int funfirstline
)
7507 struct symtabs_and_lines sals
;
7509 error ("Empty line specification.");
7510 if (default_breakpoint_valid
)
7511 sals
= decode_line_1 (&string
, funfirstline
,
7512 default_breakpoint_symtab
,
7513 default_breakpoint_line
,
7516 sals
= decode_line_1 (&string
, funfirstline
,
7517 (struct symtab
*) NULL
, 0, (char ***) NULL
);
7519 error ("Junk at end of line specification: %s", string
);
7524 _initialize_breakpoint (void)
7526 struct cmd_list_element
*c
;
7528 breakpoint_chain
= 0;
7529 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7530 before a breakpoint is set. */
7531 breakpoint_count
= 0;
7533 add_com ("ignore", class_breakpoint
, ignore_command
,
7534 "Set ignore-count of breakpoint number N to COUNT.\n\
7535 Usage is `ignore N COUNT'.");
7537 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7539 add_com ("commands", class_breakpoint
, commands_command
,
7540 "Set commands to be executed when a breakpoint is hit.\n\
7541 Give breakpoint number as argument after \"commands\".\n\
7542 With no argument, the targeted breakpoint is the last one set.\n\
7543 The commands themselves follow starting on the next line.\n\
7544 Type a line containing \"end\" to indicate the end of them.\n\
7545 Give \"silent\" as the first line to make the breakpoint silent;\n\
7546 then no output is printed when it is hit, except what the commands print.");
7548 add_com ("condition", class_breakpoint
, condition_command
,
7549 "Specify breakpoint number N to break only if COND is true.\n\
7550 Usage is `condition N COND', where N is an integer and COND is an\n\
7551 expression to be evaluated whenever breakpoint N is reached.");
7553 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7554 "Set a temporary breakpoint. Args like \"break\" command.\n\
7555 Like \"break\" except the breakpoint is only temporary,\n\
7556 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7557 by using \"enable delete\" on the breakpoint number.");
7558 set_cmd_completer (c
, location_completer
);
7560 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7561 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7562 Like \"break\" except the breakpoint requires hardware support,\n\
7563 some target hardware may not have this support.");
7564 set_cmd_completer (c
, location_completer
);
7566 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7567 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7568 Like \"hbreak\" except the breakpoint is only temporary,\n\
7569 so it will be deleted when hit.");
7570 set_cmd_completer (c
, location_completer
);
7572 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7573 "Enable some breakpoints.\n\
7574 Give breakpoint numbers (separated by spaces) as arguments.\n\
7575 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7576 This is used to cancel the effect of the \"disable\" command.\n\
7577 With a subcommand you can enable temporarily.",
7578 &enablelist
, "enable ", 1, &cmdlist
);
7580 add_com ("ab", class_breakpoint
, enable_command
,
7581 "Enable some breakpoints.\n\
7582 Give breakpoint numbers (separated by spaces) as arguments.\n\
7583 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7584 This is used to cancel the effect of the \"disable\" command.\n\
7585 With a subcommand you can enable temporarily.");
7587 add_com_alias ("en", "enable", class_breakpoint
, 1);
7589 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7590 "Enable some breakpoints.\n\
7591 Give breakpoint numbers (separated by spaces) as arguments.\n\
7592 This is used to cancel the effect of the \"disable\" command.\n\
7593 May be abbreviated to simply \"enable\".\n",
7594 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7596 add_cmd ("once", no_class
, enable_once_command
,
7597 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7598 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7601 add_cmd ("delete", no_class
, enable_delete_command
,
7602 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7603 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7606 add_cmd ("delete", no_class
, enable_delete_command
,
7607 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7608 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7611 add_cmd ("once", no_class
, enable_once_command
,
7612 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7613 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7616 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7617 "Disable some breakpoints.\n\
7618 Arguments are breakpoint numbers with spaces in between.\n\
7619 To disable all breakpoints, give no argument.\n\
7620 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7621 &disablelist
, "disable ", 1, &cmdlist
);
7622 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7623 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7625 add_com ("sb", class_breakpoint
, disable_command
,
7626 "Disable some breakpoints.\n\
7627 Arguments are breakpoint numbers with spaces in between.\n\
7628 To disable all breakpoints, give no argument.\n\
7629 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7631 add_cmd ("breakpoints", class_alias
, disable_command
,
7632 "Disable some breakpoints.\n\
7633 Arguments are breakpoint numbers with spaces in between.\n\
7634 To disable all breakpoints, give no argument.\n\
7635 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7636 This command may be abbreviated \"disable\".",
7639 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7640 "Delete some breakpoints or auto-display expressions.\n\
7641 Arguments are breakpoint numbers with spaces in between.\n\
7642 To delete all breakpoints, give no argument.\n\
7644 Also a prefix command for deletion of other GDB objects.\n\
7645 The \"unset\" command is also an alias for \"delete\".",
7646 &deletelist
, "delete ", 1, &cmdlist
);
7647 add_com_alias ("d", "delete", class_breakpoint
, 1);
7649 add_com ("db", class_breakpoint
, delete_command
,
7650 "Delete some breakpoints.\n\
7651 Arguments are breakpoint numbers with spaces in between.\n\
7652 To delete all breakpoints, give no argument.\n");
7654 add_cmd ("breakpoints", class_alias
, delete_command
,
7655 "Delete some breakpoints or auto-display expressions.\n\
7656 Arguments are breakpoint numbers with spaces in between.\n\
7657 To delete all breakpoints, give no argument.\n\
7658 This command may be abbreviated \"delete\".",
7661 add_com ("clear", class_breakpoint
, clear_command
,
7662 concat ("Clear breakpoint at specified line or function.\n\
7663 Argument may be line number, function name, or \"*\" and an address.\n\
7664 If line number is specified, all breakpoints in that line are cleared.\n\
7665 If function is specified, breakpoints at beginning of function are cleared.\n\
7666 If an address is specified, breakpoints at that address are cleared.\n\n",
7667 "With no argument, clears all breakpoints in the line that the selected frame\n\
7670 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7672 c
= add_com ("break", class_breakpoint
, break_command
,
7673 concat ("Set breakpoint at specified line or function.\n\
7674 Argument may be line number, function name, or \"*\" and an address.\n\
7675 If line number is specified, break at start of code for that line.\n\
7676 If function is specified, break at start of code for that function.\n\
7677 If an address is specified, break at that exact address.\n",
7678 "With no arg, uses current execution address of selected stack frame.\n\
7679 This is useful for breaking on return to a stack frame.\n\
7681 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7683 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7684 set_cmd_completer (c
, location_completer
);
7686 add_com_alias ("b", "break", class_run
, 1);
7687 add_com_alias ("br", "break", class_run
, 1);
7688 add_com_alias ("bre", "break", class_run
, 1);
7689 add_com_alias ("brea", "break", class_run
, 1);
7693 add_com_alias ("ba", "break", class_breakpoint
, 1);
7694 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7699 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7700 "Break in function/address or break at a line in the current file.",
7701 &stoplist
, "stop ", 1, &cmdlist
);
7702 add_cmd ("in", class_breakpoint
, stopin_command
,
7703 "Break in function or address.\n", &stoplist
);
7704 add_cmd ("at", class_breakpoint
, stopat_command
,
7705 "Break at a line in the current file.\n", &stoplist
);
7706 add_com ("status", class_info
, breakpoints_info
,
7707 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7708 The \"Type\" column indicates one of:\n\
7709 \tbreakpoint - normal breakpoint\n\
7710 \twatchpoint - watchpoint\n\
7711 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7712 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7713 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7714 address and file/line number respectively.\n\n",
7715 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7716 are set to the address of the last breakpoint listed.\n\n\
7717 Convenience variable \"$bpnum\" contains the number of the last\n\
7718 breakpoint set.", NULL
));
7721 add_info ("breakpoints", breakpoints_info
,
7722 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7723 The \"Type\" column indicates one of:\n\
7724 \tbreakpoint - normal breakpoint\n\
7725 \twatchpoint - watchpoint\n\
7726 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7727 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7728 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7729 address and file/line number respectively.\n\n",
7730 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7731 are set to the address of the last breakpoint listed.\n\n\
7732 Convenience variable \"$bpnum\" contains the number of the last\n\
7733 breakpoint set.", NULL
));
7736 add_com ("lb", class_breakpoint
, breakpoints_info
,
7737 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7738 The \"Type\" column indicates one of:\n\
7739 \tbreakpoint - normal breakpoint\n\
7740 \twatchpoint - watchpoint\n\
7741 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7742 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7743 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7744 address and file/line number respectively.\n\n",
7745 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7746 are set to the address of the last breakpoint listed.\n\n\
7747 Convenience variable \"$bpnum\" contains the number of the last\n\
7748 breakpoint set.", NULL
));
7750 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7751 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7752 The \"Type\" column indicates one of:\n\
7753 \tbreakpoint - normal breakpoint\n\
7754 \twatchpoint - watchpoint\n\
7755 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7756 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7757 \tuntil - internal breakpoint used by the \"until\" command\n\
7758 \tfinish - internal breakpoint used by the \"finish\" command\n",
7759 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7760 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7761 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7762 address and file/line number respectively.\n\n",
7763 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7764 are set to the address of the last breakpoint listed.\n\n\
7765 Convenience variable \"$bpnum\" contains the number of the last\n\
7766 breakpoint set.", NULL
),
7767 &maintenanceinfolist
);
7769 add_com ("catch", class_breakpoint
, catch_command
,
7770 "Set catchpoints to catch events.\n\
7771 Raised signals may be caught:\n\
7772 \tcatch signal - all signals\n\
7773 \tcatch signal <signame> - a particular signal\n\
7774 Raised exceptions may be caught:\n\
7775 \tcatch throw - all exceptions, when thrown\n\
7776 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7777 \tcatch catch - all exceptions, when caught\n\
7778 \tcatch catch <exceptname> - a particular exception, when caught\n\
7779 Thread or process events may be caught:\n\
7780 \tcatch thread_start - any threads, just after creation\n\
7781 \tcatch thread_exit - any threads, just before expiration\n\
7782 \tcatch thread_join - any threads, just after joins\n\
7783 Process events may be caught:\n\
7784 \tcatch start - any processes, just after creation\n\
7785 \tcatch exit - any processes, just before expiration\n\
7786 \tcatch fork - calls to fork()\n\
7787 \tcatch vfork - calls to vfork()\n\
7788 \tcatch exec - calls to exec()\n\
7789 Dynamically-linked library events may be caught:\n\
7790 \tcatch load - loads of any library\n\
7791 \tcatch load <libname> - loads of a particular library\n\
7792 \tcatch unload - unloads of any library\n\
7793 \tcatch unload <libname> - unloads of a particular library\n\
7794 The act of your program's execution stopping may also be caught:\n\
7796 C++ exceptions may be caught:\n\
7797 \tcatch throw - all exceptions, when thrown\n\
7798 \tcatch catch - all exceptions, when caught\n\
7800 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7801 after a fork or vfork is caught.\n\n\
7802 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7804 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7805 "Set temporary catchpoints to catch events.\n\
7806 Args like \"catch\" command.\n\
7807 Like \"catch\" except the catchpoint is only temporary,\n\
7808 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7809 by using \"enable delete\" on the catchpoint number.");
7811 c
= add_com ("watch", class_breakpoint
, watch_command
,
7812 "Set a watchpoint for an expression.\n\
7813 A watchpoint stops execution of your program whenever the value of\n\
7814 an expression changes.");
7815 set_cmd_completer (c
, location_completer
);
7817 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
7818 "Set a read watchpoint for an expression.\n\
7819 A watchpoint stops execution of your program whenever the value of\n\
7820 an expression is read.");
7821 set_cmd_completer (c
, location_completer
);
7823 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
7824 "Set a watchpoint for an expression.\n\
7825 A watchpoint stops execution of your program whenever the value of\n\
7826 an expression is either read or written.");
7827 set_cmd_completer (c
, location_completer
);
7829 add_info ("watchpoints", breakpoints_info
,
7830 "Synonym for ``info breakpoints''.");
7833 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
7834 (char *) &can_use_hw_watchpoints
,
7835 "Set debugger's willingness to use watchpoint hardware.\n\
7836 If zero, gdb will not use hardware for new watchpoints, even if\n\
7837 such is available. (However, any hardware watchpoints that were\n\
7838 created before setting this to nonzero, will continue to use watchpoint\n\
7841 add_show_from_set (c
, &showlist
);
7843 can_use_hw_watchpoints
= 1;