1 /* Everything about breakpoints, for GDB.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
28 #include "breakpoint.h"
30 #include "expression.h"
36 #include "gdbthread.h"
39 #include "gdb_string.h"
45 #include "completer.h"
49 #include "gdb-events.h"
51 /* Prototypes for local functions. */
53 static void until_break_command_continuation (struct continuation_arg
*arg
);
55 static void catch_command_1 (char *, int, int);
57 static void enable_delete_command (char *, int);
59 static void enable_delete_breakpoint (struct breakpoint
*);
61 static void enable_once_command (char *, int);
63 static void enable_once_breakpoint (struct breakpoint
*);
65 static void disable_command (char *, int);
67 static void enable_command (char *, int);
69 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
71 static void ignore_command (char *, int);
73 static int breakpoint_re_set_one (PTR
);
75 static void clear_command (char *, int);
77 static void catch_command (char *, int);
79 static void handle_gnu_4_16_catch_command (char *, int, int);
81 static struct symtabs_and_lines
get_catch_sals (int);
83 static void watch_command (char *, int);
85 static int can_use_hardware_watchpoint (struct value
*);
87 static void break_at_finish_command (char *, int);
88 static void break_at_finish_at_depth_command (char *, int);
90 static 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 describe_other_breakpoints (CORE_ADDR
, asection
*);
102 static void breakpoints_info (char *, int);
104 static void breakpoint_1 (int, int);
106 static bpstat
bpstat_alloc (struct breakpoint
*, bpstat
);
108 static int breakpoint_cond_eval (PTR
);
110 static void cleanup_executing_breakpoints (PTR
);
112 static void commands_command (char *, int);
114 static void condition_command (char *, int);
116 static int get_number_trailer (char **, int);
118 void set_breakpoint_count (int);
121 static struct breakpoint
*create_temp_exception_breakpoint (CORE_ADDR
);
131 static int remove_breakpoint (struct breakpoint
*, insertion_state_t
);
133 static enum print_stop_action
print_it_typical (bpstat
);
135 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
139 enum exception_event_kind kind
;
142 args_for_catchpoint_enable
;
144 static int watchpoint_check (PTR
);
146 static int cover_target_enable_exception_callback (PTR
);
148 static void maintenance_info_breakpoints (char *, int);
150 #ifdef GET_LONGJMP_TARGET
151 static void create_longjmp_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 static int internal_breakpoint_number
= -1;
223 /* Are we executing breakpoint commands? */
224 static int executing_breakpoint_commands
;
226 /* Walk the following statement or block through all breakpoints.
227 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
230 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
232 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
233 for (B = breakpoint_chain; \
234 B ? (TMP=B->next, 1): 0; \
237 /* True if SHIFT_INST_REGS defined, false otherwise. */
239 int must_shift_inst_regs
=
240 #if defined(SHIFT_INST_REGS)
247 /* True if breakpoint hit counts should be displayed in breakpoint info. */
249 int show_breakpoint_hit_counts
= 1;
251 /* Chain of all breakpoints defined. */
253 struct breakpoint
*breakpoint_chain
;
255 /* Number of last breakpoint made. */
257 int breakpoint_count
;
259 /* Pointer to current exception event record */
260 static struct exception_event_record
*current_exception_event
;
262 /* Indicator of whether exception catchpoints should be nuked
263 between runs of a program */
264 int exception_catchpoints_are_fragile
= 0;
266 /* Indicator of when exception catchpoints set-up should be
267 reinitialized -- e.g. when program is re-run */
268 int exception_support_initialized
= 0;
270 /* This function returns a pointer to the string representation of the
271 pathname of the dynamically-linked library that has just been
274 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
275 or undefined results are guaranteed.
277 This string's contents are only valid immediately after the
278 inferior has stopped in the dynamic linker hook, and becomes
279 invalid as soon as the inferior is continued. Clients should make
280 a copy of this string if they wish to continue the inferior and
281 then access the string. */
283 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
284 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
287 /* This function returns a pointer to the string representation of the
288 pathname of the dynamically-linked library that has just been
291 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
292 TRUE, or undefined results are guaranteed.
294 This string's contents are only valid immediately after the
295 inferior has stopped in the dynamic linker hook, and becomes
296 invalid as soon as the inferior is continued. Clients should make
297 a copy of this string if they wish to continue the inferior and
298 then access the string. */
300 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
301 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
304 /* This function is called by the "catch load" command. It allows the
305 debugger to be notified by the dynamic linker when a specified
306 library file (or any library file, if filename is NULL) is loaded. */
308 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
309 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
310 error ("catch of library loads not yet implemented on this platform")
313 /* This function is called by the "catch unload" command. It allows
314 the debugger to be notified by the dynamic linker when a specified
315 library file (or any library file, if filename is NULL) is
318 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
319 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
320 error ("catch of library unloads not yet implemented on this platform")
323 /* Set breakpoint count to NUM. */
326 set_breakpoint_count (int num
)
328 breakpoint_count
= num
;
329 set_internalvar (lookup_internalvar ("bpnum"),
330 value_from_longest (builtin_type_int
, (LONGEST
) num
));
333 /* Used in run_command to zero the hit count when a new run starts. */
336 clear_breakpoint_hit_counts (void)
338 struct breakpoint
*b
;
344 /* Default address, symtab and line to put a breakpoint at
345 for "break" command with no arg.
346 if default_breakpoint_valid is zero, the other three are
347 not valid, and "break" with no arg is an error.
349 This set by print_stack_frame, which calls set_default_breakpoint. */
351 int default_breakpoint_valid
;
352 CORE_ADDR default_breakpoint_address
;
353 struct symtab
*default_breakpoint_symtab
;
354 int default_breakpoint_line
;
356 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
357 Advance *PP after the string and any trailing whitespace.
359 Currently the string can either be a number or "$" followed by the name
360 of a convenience variable. Making it an expression wouldn't work well
361 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
363 TRAILER is a character which can be found after the number; most
364 commonly this is `-'. If you don't want a trailer, use \0. */
366 get_number_trailer (char **pp
, int trailer
)
368 int retval
= 0; /* default */
372 /* Empty line means refer to the last breakpoint. */
373 return breakpoint_count
;
376 /* Make a copy of the name, so we can null-terminate it
377 to pass to lookup_internalvar(). */
382 while (isalnum (*p
) || *p
== '_')
384 varname
= (char *) alloca (p
- start
+ 1);
385 strncpy (varname
, start
, p
- start
);
386 varname
[p
- start
] = '\0';
387 val
= value_of_internalvar (lookup_internalvar (varname
));
388 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_INT
)
389 retval
= (int) value_as_long (val
);
392 printf_filtered ("Convenience variable must have integer value.\n");
400 while (*p
>= '0' && *p
<= '9')
403 /* There is no number here. (e.g. "cond a == b"). */
405 /* Skip non-numeric token */
406 while (*p
&& !isspace((int) *p
))
408 /* Return zero, which caller must interpret as error. */
414 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
416 /* Trailing junk: return 0 and let caller print error msg. */
417 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
428 /* Like get_number_trailer, but don't allow a trailer. */
430 get_number (char **pp
)
432 return get_number_trailer (pp
, '\0');
435 /* Parse a number or a range.
436 * A number will be of the form handled by get_number.
437 * A range will be of the form <number1> - <number2>, and
438 * will represent all the integers between number1 and number2,
441 * While processing a range, this fuction is called iteratively;
442 * At each call it will return the next value in the range.
444 * At the beginning of parsing a range, the char pointer PP will
445 * be advanced past <number1> and left pointing at the '-' token.
446 * Subsequent calls will not advance the pointer until the range
447 * is completed. The call that completes the range will advance
448 * pointer PP past <number2>.
452 get_number_or_range (char **pp
)
454 static int last_retval
, end_value
;
455 static char *end_ptr
;
456 static int in_range
= 0;
460 /* Default case: pp is pointing either to a solo number,
461 or to the first number of a range. */
462 last_retval
= get_number_trailer (pp
, '-');
467 /* This is the start of a range (<number1> - <number2>).
468 Skip the '-', parse and remember the second number,
469 and also remember the end of the final token. */
473 while (isspace ((int) *end_ptr
))
474 end_ptr
++; /* skip white space */
475 end_value
= get_number (temp
);
476 if (end_value
< last_retval
)
478 error ("inverted range");
480 else if (end_value
== last_retval
)
482 /* degenerate range (number1 == number2). Advance the
483 token pointer so that the range will be treated as a
492 error ("negative value");
495 /* pp points to the '-' that betokens a range. All
496 number-parsing has already been done. Return the next
497 integer value (one greater than the saved previous value).
498 Do not advance the token pointer 'pp' until the end of range
501 if (++last_retval
== end_value
)
503 /* End of range reached; advance token pointer. */
513 /* condition N EXP -- set break condition of breakpoint N to EXP. */
516 condition_command (char *arg
, int from_tty
)
518 register struct breakpoint
*b
;
523 error_no_arg ("breakpoint number");
526 bnum
= get_number (&p
);
528 error ("Bad breakpoint argument: '%s'", arg
);
531 if (b
->number
== bnum
)
538 if (b
->cond_string
!= NULL
)
539 xfree (b
->cond_string
);
544 b
->cond_string
= NULL
;
546 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
551 /* I don't know if it matters whether this is the string the user
552 typed in or the decompiled expression. */
553 b
->cond_string
= savestring (arg
, strlen (arg
));
554 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->address
), 0);
556 error ("Junk at end of expression");
558 breakpoints_changed ();
562 error ("No breakpoint number %d.", bnum
);
567 commands_command (char *arg
, int from_tty
)
569 register struct breakpoint
*b
;
572 struct command_line
*l
;
574 /* If we allowed this, we would have problems with when to
575 free the storage, if we change the commands currently
578 if (executing_breakpoint_commands
)
579 error ("Can't use the \"commands\" command among a breakpoint's commands.");
582 bnum
= get_number (&p
);
585 error ("Unexpected extra arguments following breakpoint number.");
588 if (b
->number
== bnum
)
592 "Type commands for when breakpoint %d is hit, one per line.",
594 l
= read_command_lines (tmpbuf
, from_tty
);
595 free_command_lines (&b
->commands
);
597 breakpoints_changed ();
600 error ("No breakpoint number %d.", bnum
);
603 /* Like target_read_memory() but if breakpoints are inserted, return
604 the shadow contents instead of the breakpoints themselves.
606 Read "memory data" from whatever target or inferior we have.
607 Returns zero if successful, errno value if not. EIO is used
608 for address out of bounds. If breakpoints are inserted, returns
609 shadow contents, not the breakpoints themselves. From breakpoint.c. */
612 read_memory_nobpt (CORE_ADDR memaddr
, char *myaddr
, unsigned len
)
615 struct breakpoint
*b
;
616 CORE_ADDR bp_addr
= 0;
619 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
620 /* No breakpoints on this machine. */
621 return target_read_memory (memaddr
, myaddr
, len
);
625 if (b
->type
== bp_none
)
626 warning ("reading through apparently deleted breakpoint #%d?",
629 /* memory breakpoint? */
630 if (b
->type
== bp_watchpoint
631 || b
->type
== bp_hardware_watchpoint
632 || b
->type
== bp_read_watchpoint
633 || b
->type
== bp_access_watchpoint
)
638 /* Addresses and length of the part of the breakpoint that
640 /* XXXX The m68k, sh and h8300 have different local and remote
641 breakpoint values. BREAKPOINT_FROM_PC still manages to
642 correctly determine the breakpoints memory address and size
643 for these targets. */
644 bp_addr
= b
->address
;
646 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
651 if (bp_addr
+ bp_size
<= memaddr
)
652 /* The breakpoint is entirely before the chunk of memory we
655 if (bp_addr
>= memaddr
+ len
)
656 /* The breakpoint is entirely after the chunk of memory we are
659 /* Copy the breakpoint from the shadow contents, and recurse for
660 the things before and after. */
662 /* Offset within shadow_contents. */
665 if (bp_addr
< memaddr
)
667 /* Only copy the second part of the breakpoint. */
668 bp_size
-= memaddr
- bp_addr
;
669 bptoffset
= memaddr
- bp_addr
;
673 if (bp_addr
+ bp_size
> memaddr
+ len
)
675 /* Only copy the first part of the breakpoint. */
676 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
679 memcpy (myaddr
+ bp_addr
- memaddr
,
680 b
->shadow_contents
+ bptoffset
, bp_size
);
682 if (bp_addr
> memaddr
)
684 /* Copy the section of memory before the breakpoint. */
685 status
= read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
690 if (bp_addr
+ bp_size
< memaddr
+ len
)
692 /* Copy the section of memory after the breakpoint. */
693 status
= read_memory_nobpt (bp_addr
+ bp_size
,
694 myaddr
+ bp_addr
+ bp_size
- memaddr
,
695 memaddr
+ len
- (bp_addr
+ bp_size
));
702 /* Nothing overlaps. Just call read_memory_noerr. */
703 return target_read_memory (memaddr
, myaddr
, len
);
707 /* insert_breakpoints is used when starting or continuing the program.
708 remove_breakpoints is used when the program stops.
709 Both return zero if successful,
710 or an `errno' value if could not write the inferior. */
713 insert_breakpoints (void)
715 register struct breakpoint
*b
, *temp
;
716 int return_val
= 0; /* return success code. */
718 int disabled_breaks
= 0;
720 static char message1
[] = "Error inserting catchpoint %d:\n";
721 static char message
[sizeof (message1
) + 30];
724 ALL_BREAKPOINTS_SAFE (b
, temp
)
726 if (b
->enable_state
== bp_permanent
)
727 /* Permanent breakpoints cannot be inserted or removed. */
729 else if (b
->type
!= bp_watchpoint
730 && b
->type
!= bp_hardware_watchpoint
731 && b
->type
!= bp_read_watchpoint
732 && b
->type
!= bp_access_watchpoint
733 && b
->type
!= bp_catch_fork
734 && b
->type
!= bp_catch_vfork
735 && b
->type
!= bp_catch_exec
736 && b
->type
!= bp_catch_throw
737 && b
->type
!= bp_catch_catch
738 && b
->enable_state
!= bp_disabled
739 && b
->enable_state
!= bp_shlib_disabled
740 && b
->enable_state
!= bp_call_disabled
744 if (b
->type
== bp_hardware_breakpoint
)
745 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
748 /* Check to see if breakpoint is in an overlay section;
749 if so, we should set the breakpoint at the LMA address.
750 Only if the section is currently mapped should we ALSO
751 set a break at the VMA address. */
752 if (overlay_debugging
&& b
->section
&&
753 section_is_overlay (b
->section
))
757 addr
= overlay_unmapped_address (b
->address
, b
->section
);
758 val
= target_insert_breakpoint (addr
, b
->shadow_contents
);
759 /* This would be the time to check val, to see if the
760 breakpoint write to the load address succeeded.
761 However, this might be an ordinary occurrance, eg. if
762 the unmapped overlay is in ROM. */
763 val
= 0; /* in case unmapped address failed */
764 if (section_is_mapped (b
->section
))
765 val
= target_insert_breakpoint (b
->address
,
768 else /* ordinary (non-overlay) address */
769 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
773 /* Can't set the breakpoint. */
774 #if defined (DISABLE_UNSETTABLE_BREAK)
775 if (DISABLE_UNSETTABLE_BREAK (b
->address
))
777 /* See also: disable_breakpoints_in_shlibs. */
779 b
->enable_state
= bp_shlib_disabled
;
780 if (!disabled_breaks
)
782 target_terminal_ours_for_output ();
783 warning ("Cannot insert breakpoint %d:", b
->number
);
784 warning ("Temporarily disabling shared library breakpoints:");
787 warning ("breakpoint #%d ", b
->number
);
792 target_terminal_ours_for_output ();
793 warning ("Cannot insert breakpoint %d:", b
->number
);
794 #ifdef ONE_PROCESS_WRITETEXT
795 warning ("The same program may be running in another process.");
797 memory_error (val
, b
->address
); /* which bombs us out */
804 return_val
= val
; /* remember failure */
806 else if (ep_is_exception_catchpoint (b
)
807 && b
->enable_state
!= bp_disabled
808 && b
->enable_state
!= bp_shlib_disabled
809 && b
->enable_state
!= bp_call_disabled
814 /* If we get here, we must have a callback mechanism for exception
815 events -- with g++ style embedded label support, we insert
816 ordinary breakpoints and not catchpoints. */
817 /* Format possible error message */
818 sprintf (message
, message1
, b
->number
);
820 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
823 /* Couldn't set breakpoint for some reason */
824 target_terminal_ours_for_output ();
825 warning ("Cannot insert catchpoint %d; disabling it.",
827 b
->enable_state
= bp_disabled
;
831 /* Bp set, now make sure callbacks are enabled */
833 args_for_catchpoint_enable args
;
834 args
.kind
= b
->type
== bp_catch_catch
?
835 EX_EVENT_CATCH
: EX_EVENT_THROW
;
837 val
= catch_errors (cover_target_enable_exception_callback
,
839 message
, RETURN_MASK_ALL
);
840 if (val
!= 0 && val
!= -1)
844 /* Check if something went wrong; val == 0 can be ignored */
847 /* something went wrong */
848 target_terminal_ours_for_output ();
849 warning ("Cannot insert catchpoint %d; disabling it.",
851 b
->enable_state
= bp_disabled
;
856 return_val
= val
; /* remember failure */
859 else if ((b
->type
== bp_hardware_watchpoint
||
860 b
->type
== bp_read_watchpoint
||
861 b
->type
== bp_access_watchpoint
)
862 && b
->enable_state
== bp_enabled
863 && b
->disposition
!= disp_del_at_next_stop
867 struct frame_info
*saved_frame
;
868 int saved_level
, within_current_scope
;
869 struct value
*mark
= value_mark ();
872 /* Save the current frame and level so we can restore it after
873 evaluating the watchpoint expression on its own frame. */
874 saved_frame
= selected_frame
;
875 saved_level
= selected_frame_level
;
877 /* Determine if the watchpoint is within scope. */
878 if (b
->exp_valid_block
== NULL
)
879 within_current_scope
= 1;
882 struct frame_info
*fi
;
884 /* There might be no current frame at this moment if we are
885 resuming from a step over a breakpoint.
886 Set up current frame before trying to find the watchpoint
888 get_current_frame ();
889 fi
= find_frame_addr_in_frame_chain (b
->watchpoint_frame
);
890 within_current_scope
= (fi
!= NULL
);
891 if (within_current_scope
)
892 select_frame (fi
, -1);
895 if (within_current_scope
)
897 /* Evaluate the expression and cut the chain of values
898 produced off from the value chain.
900 Make sure the value returned isn't lazy; we use
901 laziness to determine what memory GDB actually needed
902 in order to compute the value of the expression. */
903 v
= evaluate_expression (b
->exp
);
905 value_release_to_mark (mark
);
910 /* Look at each value on the value chain. */
911 for (; v
; v
= v
->next
)
913 /* If it's a memory location, and GDB actually needed
914 its contents to evaluate the expression, then we
916 if (VALUE_LVAL (v
) == lval_memory
919 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
921 /* We only watch structs and arrays if user asked
922 for it explicitly, never if they just happen to
923 appear in the middle of some value chain. */
924 if (v
== b
->val_chain
925 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
926 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
931 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
932 len
= TYPE_LENGTH (VALUE_TYPE (v
));
934 if (b
->type
== bp_read_watchpoint
)
936 else if (b
->type
== bp_access_watchpoint
)
939 val
= target_insert_watchpoint (addr
, len
, type
);
942 /* Don't exit the loop, try to insert
943 every value on the value chain. That's
944 because we will be removing all the
945 watches below, and removing a
946 watchpoint we didn't insert could have
954 /* Failure to insert a watchpoint on any memory value in the
955 value chain brings us here. */
958 remove_breakpoint (b
, mark_uninserted
);
959 warning ("Could not insert hardware watchpoint %d.",
966 printf_filtered ("Hardware watchpoint %d deleted ", b
->number
);
967 printf_filtered ("because the program has left the block \n");
968 printf_filtered ("in which its expression is valid.\n");
969 if (b
->related_breakpoint
)
970 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
971 b
->disposition
= disp_del_at_next_stop
;
974 /* Restore the frame and level. */
975 if ((saved_frame
!= selected_frame
) ||
976 (saved_level
!= selected_frame_level
))
977 select_frame (saved_frame
, saved_level
);
980 return_val
= val
; /* remember failure */
982 else if ((b
->type
== bp_catch_fork
983 || b
->type
== bp_catch_vfork
984 || b
->type
== bp_catch_exec
)
985 && b
->enable_state
== bp_enabled
993 val
= target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
996 val
= target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
999 val
= target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
1002 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1007 target_terminal_ours_for_output ();
1008 warning ("Cannot insert catchpoint %d.", b
->number
);
1014 return_val
= val
; /* remember failure */
1023 remove_breakpoints (void)
1025 register struct breakpoint
*b
;
1032 val
= remove_breakpoint (b
, mark_uninserted
);
1041 remove_hw_watchpoints (void)
1043 register struct breakpoint
*b
;
1049 && (b
->type
== bp_hardware_watchpoint
1050 || b
->type
== bp_read_watchpoint
1051 || b
->type
== bp_access_watchpoint
))
1053 val
= remove_breakpoint (b
, mark_uninserted
);
1062 reattach_breakpoints (int pid
)
1064 register struct breakpoint
*b
;
1066 struct cleanup
*old_chain
= save_inferior_ptid ();
1068 /* Set inferior_ptid; remove_breakpoint uses this global. */
1069 inferior_ptid
= pid_to_ptid (pid
);
1074 remove_breakpoint (b
, mark_inserted
);
1075 if (b
->type
== bp_hardware_breakpoint
)
1076 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1078 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1081 do_cleanups (old_chain
);
1086 do_cleanups (old_chain
);
1091 update_breakpoints_after_exec (void)
1093 struct breakpoint
*b
;
1094 struct breakpoint
*temp
;
1096 /* Doing this first prevents the badness of having delete_breakpoint()
1097 write a breakpoint's current "shadow contents" to lift the bp. That
1098 shadow is NOT valid after an exec()! */
1099 mark_breakpoints_out ();
1101 ALL_BREAKPOINTS_SAFE (b
, temp
)
1103 /* Solib breakpoints must be explicitly reset after an exec(). */
1104 if (b
->type
== bp_shlib_event
)
1106 delete_breakpoint (b
);
1110 /* Thread event breakpoints must be set anew after an exec(). */
1111 if (b
->type
== bp_thread_event
)
1113 delete_breakpoint (b
);
1117 /* Step-resume breakpoints are meaningless after an exec(). */
1118 if (b
->type
== bp_step_resume
)
1120 delete_breakpoint (b
);
1124 /* Ditto the sigtramp handler breakpoints. */
1125 if (b
->type
== bp_through_sigtramp
)
1127 delete_breakpoint (b
);
1131 /* Ditto the exception-handling catchpoints. */
1132 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1134 delete_breakpoint (b
);
1138 /* Don't delete an exec catchpoint, because else the inferior
1139 won't stop when it ought!
1141 Similarly, we probably ought to keep vfork catchpoints, 'cause
1142 on this target, we may not be able to stop when the vfork is
1143 seen, but only when the subsequent exec is seen. (And because
1144 deleting fork catchpoints here but not vfork catchpoints will
1145 seem mysterious to users, keep those too.)
1147 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1148 target address field, if any, is sufficient to have it be reset
1149 automagically. Certainly on HP-UX that's true.
1151 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1152 valid code address on some platforms (like the mn10200 and
1153 mn10300 simulators). We shouldn't assign any special
1154 interpretation to a breakpoint with a zero address. And in
1155 fact, GDB doesn't --- I can't see what that comment above is
1156 talking about. As far as I can tell, setting the address of a
1157 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1158 is meaningless, since those are implemented with HP-UX kernel
1159 hackery, not by storing breakpoint instructions somewhere. */
1160 if ((b
->type
== bp_catch_exec
) ||
1161 (b
->type
== bp_catch_vfork
) ||
1162 (b
->type
== bp_catch_fork
))
1164 b
->address
= (CORE_ADDR
) NULL
;
1168 /* bp_finish is a special case. The only way we ought to be able
1169 to see one of these when an exec() has happened, is if the user
1170 caught a vfork, and then said "finish". Ordinarily a finish just
1171 carries them to the call-site of the current callee, by setting
1172 a temporary bp there and resuming. But in this case, the finish
1173 will carry them entirely through the vfork & exec.
1175 We don't want to allow a bp_finish to remain inserted now. But
1176 we can't safely delete it, 'cause finish_command has a handle to
1177 the bp on a bpstat, and will later want to delete it. There's a
1178 chance (and I've seen it happen) that if we delete the bp_finish
1179 here, that its storage will get reused by the time finish_command
1180 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1181 We really must allow finish_command to delete a bp_finish.
1183 In the absense of a general solution for the "how do we know
1184 it's safe to delete something others may have handles to?"
1185 problem, what we'll do here is just uninsert the bp_finish, and
1186 let finish_command delete it.
1188 (We know the bp_finish is "doomed" in the sense that it's
1189 momentary, and will be deleted as soon as finish_command sees
1190 the inferior stopped. So it doesn't matter that the bp's
1191 address is probably bogus in the new a.out, unlike e.g., the
1192 solib breakpoints.) */
1194 if (b
->type
== bp_finish
)
1199 /* Without a symbolic address, we have little hope of the
1200 pre-exec() address meaning the same thing in the post-exec()
1202 if (b
->addr_string
== NULL
)
1204 delete_breakpoint (b
);
1208 /* If this breakpoint has survived the above battery of checks, then
1209 it must have a symbolic address. Be sure that it gets reevaluated
1210 to a target address, rather than reusing the old evaluation.
1212 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1213 for bp_catch_exec and friends, I'm pretty sure this is entirely
1214 unnecessary. A call to breakpoint_re_set_one always recomputes
1215 the breakpoint's address from scratch, or deletes it if it can't.
1216 So I think this assignment could be deleted without effect. */
1217 b
->address
= (CORE_ADDR
) NULL
;
1222 detach_breakpoints (int pid
)
1224 register struct breakpoint
*b
;
1226 struct cleanup
*old_chain
= save_inferior_ptid ();
1228 if (pid
== PIDGET (inferior_ptid
))
1229 error ("Cannot detach breakpoints of inferior_ptid");
1231 /* Set inferior_ptid; remove_breakpoint uses this global. */
1232 inferior_ptid
= pid_to_ptid (pid
);
1237 val
= remove_breakpoint (b
, mark_inserted
);
1240 do_cleanups (old_chain
);
1245 do_cleanups (old_chain
);
1250 remove_breakpoint (struct breakpoint
*b
, insertion_state_t is
)
1254 if (b
->enable_state
== bp_permanent
)
1255 /* Permanent breakpoints cannot be inserted or removed. */
1258 if (b
->type
== bp_none
)
1259 warning ("attempted to remove apparently deleted breakpoint #%d?",
1262 if (b
->type
!= bp_watchpoint
1263 && b
->type
!= bp_hardware_watchpoint
1264 && b
->type
!= bp_read_watchpoint
1265 && b
->type
!= bp_access_watchpoint
1266 && b
->type
!= bp_catch_fork
1267 && b
->type
!= bp_catch_vfork
1268 && b
->type
!= bp_catch_exec
1269 && b
->type
!= bp_catch_catch
1270 && b
->type
!= bp_catch_throw
)
1272 if (b
->type
== bp_hardware_breakpoint
)
1273 val
= target_remove_hw_breakpoint (b
->address
, b
->shadow_contents
);
1276 /* Check to see if breakpoint is in an overlay section;
1277 if so, we should remove the breakpoint at the LMA address.
1278 If that is not equal to the raw address, then we should
1279 presumably remove the breakpoint there as well. */
1280 if (overlay_debugging
&& b
->section
&&
1281 section_is_overlay (b
->section
))
1285 addr
= overlay_unmapped_address (b
->address
, b
->section
);
1286 val
= target_remove_breakpoint (addr
, b
->shadow_contents
);
1287 /* This would be the time to check val, to see if the
1288 shadow breakpoint write to the load address succeeded.
1289 However, this might be an ordinary occurrance, eg. if
1290 the unmapped overlay is in ROM. */
1291 val
= 0; /* in case unmapped address failed */
1292 if (section_is_mapped (b
->section
))
1293 val
= target_remove_breakpoint (b
->address
,
1294 b
->shadow_contents
);
1296 else /* ordinary (non-overlay) address */
1297 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1301 b
->inserted
= (is
== mark_inserted
);
1303 else if ((b
->type
== bp_hardware_watchpoint
||
1304 b
->type
== bp_read_watchpoint
||
1305 b
->type
== bp_access_watchpoint
)
1306 && b
->enable_state
== bp_enabled
1312 b
->inserted
= (is
== mark_inserted
);
1313 /* Walk down the saved value chain. */
1314 for (v
= b
->val_chain
; v
; v
= v
->next
)
1316 /* For each memory reference remove the watchpoint
1318 if (VALUE_LVAL (v
) == lval_memory
1319 && ! VALUE_LAZY (v
))
1321 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
1323 if (v
== b
->val_chain
1324 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1325 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1330 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1331 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1333 if (b
->type
== bp_read_watchpoint
)
1335 else if (b
->type
== bp_access_watchpoint
)
1338 val
= target_remove_watchpoint (addr
, len
, type
);
1345 /* Failure to remove any of the hardware watchpoints comes here. */
1346 if ((is
== mark_uninserted
) && (b
->inserted
))
1347 warning ("Could not remove hardware watchpoint %d.",
1350 /* Free the saved value chain. We will construct a new one
1351 the next time the watchpoint is inserted. */
1352 for (v
= b
->val_chain
; v
; v
= n
)
1357 b
->val_chain
= NULL
;
1359 else if ((b
->type
== bp_catch_fork
||
1360 b
->type
== bp_catch_vfork
||
1361 b
->type
== bp_catch_exec
)
1362 && b
->enable_state
== bp_enabled
1369 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1371 case bp_catch_vfork
:
1372 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1375 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1378 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1383 b
->inserted
= (is
== mark_inserted
);
1385 else if ((b
->type
== bp_catch_catch
||
1386 b
->type
== bp_catch_throw
)
1387 && b
->enable_state
== bp_enabled
1391 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1394 b
->inserted
= (is
== mark_inserted
);
1396 else if (ep_is_exception_catchpoint (b
)
1397 && b
->inserted
/* sometimes previous insert doesn't happen */
1398 && b
->enable_state
== bp_enabled
1402 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1406 b
->inserted
= (is
== mark_inserted
);
1412 /* Clear the "inserted" flag in all breakpoints. */
1415 mark_breakpoints_out (void)
1417 register struct breakpoint
*b
;
1423 /* Clear the "inserted" flag in all breakpoints and delete any
1424 breakpoints which should go away between runs of the program.
1426 Plus other such housekeeping that has to be done for breakpoints
1429 Note: this function gets called at the end of a run (by
1430 generic_mourn_inferior) and when a run begins (by
1431 init_wait_for_inferior). */
1436 breakpoint_init_inferior (enum inf_context context
)
1438 register struct breakpoint
*b
, *temp
;
1439 static int warning_needed
= 0;
1441 ALL_BREAKPOINTS_SAFE (b
, temp
)
1448 case bp_watchpoint_scope
:
1450 /* If the call dummy breakpoint is at the entry point it will
1451 cause problems when the inferior is rerun, so we better
1454 Also get rid of scope breakpoints. */
1455 delete_breakpoint (b
);
1459 case bp_hardware_watchpoint
:
1460 case bp_read_watchpoint
:
1461 case bp_access_watchpoint
:
1463 /* Likewise for watchpoints on local expressions. */
1464 if (b
->exp_valid_block
!= NULL
)
1465 delete_breakpoint (b
);
1468 /* Likewise for exception catchpoints in dynamic-linked
1469 executables where required */
1470 if (ep_is_exception_catchpoint (b
) &&
1471 exception_catchpoints_are_fragile
)
1474 delete_breakpoint (b
);
1480 if (exception_catchpoints_are_fragile
)
1481 exception_support_initialized
= 0;
1483 /* Don't issue the warning unless it's really needed... */
1484 if (warning_needed
&& (context
!= inf_exited
))
1486 warning ("Exception catchpoints from last run were deleted.");
1487 warning ("You must reinsert them explicitly.");
1492 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1493 exists at PC. It returns ordinary_breakpoint_here if it's an
1494 ordinary breakpoint, or permanent_breakpoint_here if it's a
1495 permanent breakpoint.
1496 - When continuing from a location with an ordinary breakpoint, we
1497 actually single step once before calling insert_breakpoints.
1498 - When continuing from a localion with a permanent breakpoint, we
1499 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1500 the target, to advance the PC past the breakpoint. */
1502 enum breakpoint_here
1503 breakpoint_here_p (CORE_ADDR pc
)
1505 register struct breakpoint
*b
;
1506 int any_breakpoint_here
= 0;
1509 if ((b
->enable_state
== bp_enabled
1510 || b
->enable_state
== bp_permanent
)
1511 && b
->address
== pc
) /* bp is enabled and matches pc */
1513 if (overlay_debugging
&&
1514 section_is_overlay (b
->section
) &&
1515 !section_is_mapped (b
->section
))
1516 continue; /* unmapped overlay -- can't be a match */
1517 else if (b
->enable_state
== bp_permanent
)
1518 return permanent_breakpoint_here
;
1520 any_breakpoint_here
= 1;
1523 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1527 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1528 but it only returns true if there is actually a breakpoint inserted
1532 breakpoint_inserted_here_p (CORE_ADDR pc
)
1534 register struct breakpoint
*b
;
1538 && b
->address
== pc
) /* bp is inserted and matches pc */
1540 if (overlay_debugging
&&
1541 section_is_overlay (b
->section
) &&
1542 !section_is_mapped (b
->section
))
1543 continue; /* unmapped overlay -- can't be a match */
1551 /* Return nonzero if FRAME is a dummy frame. We can't use
1552 PC_IN_CALL_DUMMY because figuring out the saved SP would take too
1553 much time, at least using get_saved_register on the 68k. This
1554 means that for this function to work right a port must use the
1555 bp_call_dummy breakpoint. */
1558 frame_in_dummy (struct frame_info
*frame
)
1560 struct breakpoint
*b
;
1565 if (USE_GENERIC_DUMMY_FRAMES
)
1566 return generic_pc_in_call_dummy (frame
->pc
, frame
->frame
, frame
->frame
);
1570 if (b
->type
== bp_call_dummy
1571 && b
->frame
== frame
->frame
1572 /* We need to check the PC as well as the frame on the sparc,
1573 for signals.exp in the testsuite. */
1576 - SIZEOF_CALL_DUMMY_WORDS
/ sizeof (LONGEST
) * REGISTER_SIZE
))
1577 && frame
->pc
<= b
->address
)
1583 /* breakpoint_thread_match (PC, PID) returns true if the breakpoint at
1584 PC is valid for process/thread PID. */
1587 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1589 struct breakpoint
*b
;
1592 thread
= pid_to_thread_id (ptid
);
1595 if (b
->enable_state
!= bp_disabled
1596 && b
->enable_state
!= bp_shlib_disabled
1597 && b
->enable_state
!= bp_call_disabled
1599 && (b
->thread
== -1 || b
->thread
== thread
))
1601 if (overlay_debugging
&&
1602 section_is_overlay (b
->section
) &&
1603 !section_is_mapped (b
->section
))
1604 continue; /* unmapped overlay -- can't be a match */
1613 /* bpstat stuff. External routines' interfaces are documented
1617 ep_is_catchpoint (struct breakpoint
*ep
)
1620 (ep
->type
== bp_catch_load
)
1621 || (ep
->type
== bp_catch_unload
)
1622 || (ep
->type
== bp_catch_fork
)
1623 || (ep
->type
== bp_catch_vfork
)
1624 || (ep
->type
== bp_catch_exec
)
1625 || (ep
->type
== bp_catch_catch
)
1626 || (ep
->type
== bp_catch_throw
);
1628 /* ??rehrauer: Add more kinds here, as are implemented... */
1632 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1635 (ep
->type
== bp_catch_load
)
1636 || (ep
->type
== bp_catch_unload
);
1640 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1643 (ep
->type
== bp_catch_catch
)
1644 || (ep
->type
== bp_catch_throw
);
1647 /* Clear a bpstat so that it says we are not at any breakpoint.
1648 Also free any storage that is part of a bpstat. */
1651 bpstat_clear (bpstat
*bsp
)
1662 if (p
->old_val
!= NULL
)
1663 value_free (p
->old_val
);
1670 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1671 is part of the bpstat is copied as well. */
1674 bpstat_copy (bpstat bs
)
1678 bpstat retval
= NULL
;
1683 for (; bs
!= NULL
; bs
= bs
->next
)
1685 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1686 memcpy (tmp
, bs
, sizeof (*tmp
));
1688 /* This is the first thing in the chain. */
1698 /* Find the bpstat associated with this breakpoint */
1701 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1706 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1708 if (bsp
->breakpoint_at
== breakpoint
)
1714 /* Find a step_resume breakpoint associated with this bpstat.
1715 (If there are multiple step_resume bp's on the list, this function
1716 will arbitrarily pick one.)
1718 It is an error to use this function if BPSTAT doesn't contain a
1719 step_resume breakpoint.
1721 See wait_for_inferior's use of this function. */
1723 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1728 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1730 current_thread
= pid_to_thread_id (inferior_ptid
);
1732 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1734 if ((bsp
->breakpoint_at
!= NULL
) &&
1735 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1736 (bsp
->breakpoint_at
->thread
== current_thread
||
1737 bsp
->breakpoint_at
->thread
== -1))
1738 return bsp
->breakpoint_at
;
1741 error ("Internal error (no step_resume breakpoint found)");
1745 /* Return the breakpoint number of the first breakpoint we are stopped
1746 at. *BSP upon return is a bpstat which points to the remaining
1747 breakpoints stopped at (but which is not guaranteed to be good for
1748 anything but further calls to bpstat_num).
1749 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1752 bpstat_num (bpstat
*bsp
)
1754 struct breakpoint
*b
;
1757 return 0; /* No more breakpoint values */
1760 b
= (*bsp
)->breakpoint_at
;
1761 *bsp
= (*bsp
)->next
;
1763 return -1; /* breakpoint that's been deleted since */
1765 return b
->number
; /* We have its number */
1769 /* Modify BS so that the actions will not be performed. */
1772 bpstat_clear_actions (bpstat bs
)
1774 for (; bs
!= NULL
; bs
= bs
->next
)
1776 bs
->commands
= NULL
;
1777 if (bs
->old_val
!= NULL
)
1779 value_free (bs
->old_val
);
1785 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1788 cleanup_executing_breakpoints (PTR ignore
)
1790 executing_breakpoint_commands
= 0;
1793 /* Execute all the commands associated with all the breakpoints at this
1794 location. Any of these commands could cause the process to proceed
1795 beyond this point, etc. We look out for such changes by checking
1796 the global "breakpoint_proceeded" after each command. */
1799 bpstat_do_actions (bpstat
*bsp
)
1802 struct cleanup
*old_chain
;
1803 struct command_line
*cmd
;
1805 /* Avoid endless recursion if a `source' command is contained
1807 if (executing_breakpoint_commands
)
1810 executing_breakpoint_commands
= 1;
1811 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
1814 /* Note that (as of this writing), our callers all appear to
1815 be passing us the address of global stop_bpstat. And, if
1816 our calls to execute_control_command cause the inferior to
1817 proceed, that global (and hence, *bsp) will change.
1819 We must be careful to not touch *bsp unless the inferior
1820 has not proceeded. */
1822 /* This pointer will iterate over the list of bpstat's. */
1825 breakpoint_proceeded
= 0;
1826 for (; bs
!= NULL
; bs
= bs
->next
)
1831 execute_control_command (cmd
);
1833 if (breakpoint_proceeded
)
1838 if (breakpoint_proceeded
)
1839 /* The inferior is proceeded by the command; bomb out now.
1840 The bpstat chain has been blown away by wait_for_inferior.
1841 But since execution has stopped again, there is a new bpstat
1842 to look at, so start over. */
1845 bs
->commands
= NULL
;
1848 executing_breakpoint_commands
= 0;
1849 discard_cleanups (old_chain
);
1852 /* This is the normal print function for a bpstat. In the future,
1853 much of this logic could (should?) be moved to bpstat_stop_status,
1854 by having it set different print_it values.
1856 Current scheme: When we stop, bpstat_print() is called. It loops
1857 through the bpstat list of things causing this stop, calling the
1858 print_bp_stop_message function on each one. The behavior of the
1859 print_bp_stop_message function depends on the print_it field of
1860 bpstat. If such field so indicates, call this function here.
1862 Return values from this routine (ultimately used by bpstat_print()
1863 and normal_stop() to decide what to do):
1864 PRINT_NOTHING: Means we already printed all we needed to print,
1865 don't print anything else.
1866 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
1867 that something to be followed by a location.
1868 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
1869 that something to be followed by a location.
1870 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
1873 static enum print_stop_action
1874 print_it_typical (bpstat bs
)
1876 struct cleanup
*old_chain
;
1877 struct ui_stream
*stb
;
1878 stb
= ui_out_stream_new (uiout
);
1879 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
1880 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
1881 which has since been deleted. */
1882 if (bs
->breakpoint_at
== NULL
)
1883 return PRINT_UNKNOWN
;
1885 switch (bs
->breakpoint_at
->type
)
1888 case bp_hardware_breakpoint
:
1889 annotate_breakpoint (bs
->breakpoint_at
->number
);
1890 ui_out_text (uiout
, "\nBreakpoint ");
1891 if (ui_out_is_mi_like_p (uiout
))
1892 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
1893 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
1894 ui_out_text (uiout
, ", ");
1895 return PRINT_SRC_AND_LOC
;
1898 case bp_shlib_event
:
1899 /* Did we stop because the user set the stop_on_solib_events
1900 variable? (If so, we report this as a generic, "Stopped due
1901 to shlib event" message.) */
1902 printf_filtered ("Stopped due to shared library event\n");
1903 return PRINT_NOTHING
;
1906 case bp_thread_event
:
1907 /* Not sure how we will get here.
1908 GDB should not stop for these breakpoints. */
1909 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
1910 return PRINT_NOTHING
;
1914 annotate_catchpoint (bs
->breakpoint_at
->number
);
1915 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
1916 printf_filtered ("loaded");
1917 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
1918 return PRINT_SRC_AND_LOC
;
1921 case bp_catch_unload
:
1922 annotate_catchpoint (bs
->breakpoint_at
->number
);
1923 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
1924 printf_filtered ("unloaded");
1925 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
1926 return PRINT_SRC_AND_LOC
;
1930 annotate_catchpoint (bs
->breakpoint_at
->number
);
1931 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
1932 printf_filtered ("forked");
1933 printf_filtered (" process %d), ",
1934 bs
->breakpoint_at
->forked_inferior_pid
);
1935 return PRINT_SRC_AND_LOC
;
1938 case bp_catch_vfork
:
1939 annotate_catchpoint (bs
->breakpoint_at
->number
);
1940 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
1941 printf_filtered ("vforked");
1942 printf_filtered (" process %d), ",
1943 bs
->breakpoint_at
->forked_inferior_pid
);
1944 return PRINT_SRC_AND_LOC
;
1948 annotate_catchpoint (bs
->breakpoint_at
->number
);
1949 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
1950 bs
->breakpoint_at
->number
,
1951 bs
->breakpoint_at
->exec_pathname
);
1952 return PRINT_SRC_AND_LOC
;
1955 case bp_catch_catch
:
1956 if (current_exception_event
&&
1957 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
1959 annotate_catchpoint (bs
->breakpoint_at
->number
);
1960 printf_filtered ("\nCatchpoint %d (exception caught), ",
1961 bs
->breakpoint_at
->number
);
1962 printf_filtered ("throw location ");
1963 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
1964 printf_filtered ("%s:%d",
1965 CURRENT_EXCEPTION_THROW_FILE
,
1966 CURRENT_EXCEPTION_THROW_LINE
);
1968 printf_filtered ("unknown");
1970 printf_filtered (", catch location ");
1971 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
1972 printf_filtered ("%s:%d",
1973 CURRENT_EXCEPTION_CATCH_FILE
,
1974 CURRENT_EXCEPTION_CATCH_LINE
);
1976 printf_filtered ("unknown");
1978 printf_filtered ("\n");
1979 /* don't bother to print location frame info */
1980 return PRINT_SRC_ONLY
;
1984 /* really throw, some other bpstat will handle it */
1985 return PRINT_UNKNOWN
;
1989 case bp_catch_throw
:
1990 if (current_exception_event
&&
1991 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
1993 annotate_catchpoint (bs
->breakpoint_at
->number
);
1994 printf_filtered ("\nCatchpoint %d (exception thrown), ",
1995 bs
->breakpoint_at
->number
);
1996 printf_filtered ("throw location ");
1997 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
1998 printf_filtered ("%s:%d",
1999 CURRENT_EXCEPTION_THROW_FILE
,
2000 CURRENT_EXCEPTION_THROW_LINE
);
2002 printf_filtered ("unknown");
2004 printf_filtered (", catch location ");
2005 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2006 printf_filtered ("%s:%d",
2007 CURRENT_EXCEPTION_CATCH_FILE
,
2008 CURRENT_EXCEPTION_CATCH_LINE
);
2010 printf_filtered ("unknown");
2012 printf_filtered ("\n");
2013 /* don't bother to print location frame info */
2014 return PRINT_SRC_ONLY
;
2018 /* really catch, some other bpstat will handle it */
2019 return PRINT_UNKNOWN
;
2024 case bp_hardware_watchpoint
:
2025 if (bs
->old_val
!= NULL
)
2027 annotate_watchpoint (bs
->breakpoint_at
->number
);
2028 if (ui_out_is_mi_like_p (uiout
))
2029 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2030 mention (bs
->breakpoint_at
);
2031 ui_out_tuple_begin (uiout
, "value");
2032 ui_out_text (uiout
, "\nOld value = ");
2033 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2034 ui_out_field_stream (uiout
, "old", stb
);
2035 ui_out_text (uiout
, "\nNew value = ");
2036 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2037 ui_out_field_stream (uiout
, "new", stb
);
2038 ui_out_tuple_end (uiout
);
2039 ui_out_text (uiout
, "\n");
2040 value_free (bs
->old_val
);
2043 /* More than one watchpoint may have been triggered. */
2044 return PRINT_UNKNOWN
;
2047 case bp_read_watchpoint
:
2048 if (ui_out_is_mi_like_p (uiout
))
2049 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2050 mention (bs
->breakpoint_at
);
2051 ui_out_tuple_begin (uiout
, "value");
2052 ui_out_text (uiout
, "\nValue = ");
2053 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2054 ui_out_field_stream (uiout
, "value", stb
);
2055 ui_out_tuple_end (uiout
);
2056 ui_out_text (uiout
, "\n");
2057 return PRINT_UNKNOWN
;
2060 case bp_access_watchpoint
:
2061 if (bs
->old_val
!= NULL
)
2063 annotate_watchpoint (bs
->breakpoint_at
->number
);
2064 if (ui_out_is_mi_like_p (uiout
))
2065 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2066 mention (bs
->breakpoint_at
);
2067 ui_out_tuple_begin (uiout
, "value");
2068 ui_out_text (uiout
, "\nOld value = ");
2069 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2070 ui_out_field_stream (uiout
, "old", stb
);
2071 value_free (bs
->old_val
);
2073 ui_out_text (uiout
, "\nNew value = ");
2077 mention (bs
->breakpoint_at
);
2078 if (ui_out_is_mi_like_p (uiout
))
2079 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2080 ui_out_tuple_begin (uiout
, "value");
2081 ui_out_text (uiout
, "\nValue = ");
2083 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2084 ui_out_field_stream (uiout
, "new", stb
);
2085 ui_out_tuple_end (uiout
);
2086 ui_out_text (uiout
, "\n");
2087 return PRINT_UNKNOWN
;
2090 /* Fall through, we don't deal with these types of breakpoints
2094 if (ui_out_is_mi_like_p (uiout
))
2095 ui_out_field_string (uiout
, "reason", "function-finished");
2096 return PRINT_UNKNOWN
;
2100 if (ui_out_is_mi_like_p (uiout
))
2101 ui_out_field_string (uiout
, "reason", "location-reached");
2102 return PRINT_UNKNOWN
;
2107 case bp_longjmp_resume
:
2108 case bp_step_resume
:
2109 case bp_through_sigtramp
:
2110 case bp_watchpoint_scope
:
2113 return PRINT_UNKNOWN
;
2117 /* Generic routine for printing messages indicating why we
2118 stopped. The behavior of this function depends on the value
2119 'print_it' in the bpstat structure. Under some circumstances we
2120 may decide not to print anything here and delegate the task to
2123 static enum print_stop_action
2124 print_bp_stop_message (bpstat bs
)
2126 switch (bs
->print_it
)
2129 /* Nothing should be printed for this bpstat entry. */
2130 return PRINT_UNKNOWN
;
2134 /* We still want to print the frame, but we already printed the
2135 relevant messages. */
2136 return PRINT_SRC_AND_LOC
;
2139 case print_it_normal
:
2140 /* Normal case, we handle everything in print_it_typical. */
2141 return print_it_typical (bs
);
2144 internal_error (__FILE__
, __LINE__
,
2145 "print_bp_stop_message: unrecognized enum value");
2150 /* Print a message indicating what happened. This is called from
2151 normal_stop(). The input to this routine is the head of the bpstat
2152 list - a list of the eventpoints that caused this stop. This
2153 routine calls the generic print routine for printing a message
2154 about reasons for stopping. This will print (for example) the
2155 "Breakpoint n," part of the output. The return value of this
2158 PRINT_UNKNOWN: Means we printed nothing
2159 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2160 code to print the location. An example is
2161 "Breakpoint 1, " which should be followed by
2163 PRINT_SRC_ONLY: Means we printed something, but there is no need
2164 to also print the location part of the message.
2165 An example is the catch/throw messages, which
2166 don't require a location appended to the end.
2167 PRINT_NOTHING: We have done some printing and we don't need any
2168 further info to be printed.*/
2170 enum print_stop_action
2171 bpstat_print (bpstat bs
)
2175 /* Maybe another breakpoint in the chain caused us to stop.
2176 (Currently all watchpoints go on the bpstat whether hit or not.
2177 That probably could (should) be changed, provided care is taken
2178 with respect to bpstat_explains_signal). */
2179 for (; bs
; bs
= bs
->next
)
2181 val
= print_bp_stop_message (bs
);
2182 if (val
== PRINT_SRC_ONLY
2183 || val
== PRINT_SRC_AND_LOC
2184 || val
== PRINT_NOTHING
)
2188 /* We reached the end of the chain, or we got a null BS to start
2189 with and nothing was printed. */
2190 return PRINT_UNKNOWN
;
2193 /* Evaluate the expression EXP and return 1 if value is zero.
2194 This is used inside a catch_errors to evaluate the breakpoint condition.
2195 The argument is a "struct expression *" that has been cast to char * to
2196 make it pass through catch_errors. */
2199 breakpoint_cond_eval (PTR exp
)
2201 struct value
*mark
= value_mark ();
2202 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2203 value_free_to_mark (mark
);
2207 /* Allocate a new bpstat and chain it to the current one. */
2210 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2214 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2216 bs
->breakpoint_at
= b
;
2217 /* If the condition is false, etc., don't do the commands. */
2218 bs
->commands
= NULL
;
2220 bs
->print_it
= print_it_normal
;
2224 /* Possible return values for watchpoint_check (this can't be an enum
2225 because of check_errors). */
2226 /* The watchpoint has been deleted. */
2227 #define WP_DELETED 1
2228 /* The value has changed. */
2229 #define WP_VALUE_CHANGED 2
2230 /* The value has not changed. */
2231 #define WP_VALUE_NOT_CHANGED 3
2233 #define BP_TEMPFLAG 1
2234 #define BP_HARDWAREFLAG 2
2236 /* Check watchpoint condition. */
2239 watchpoint_check (PTR p
)
2241 bpstat bs
= (bpstat
) p
;
2242 struct breakpoint
*b
;
2243 struct frame_info
*fr
;
2244 int within_current_scope
;
2246 b
= bs
->breakpoint_at
;
2248 if (b
->exp_valid_block
== NULL
)
2249 within_current_scope
= 1;
2252 /* There is no current frame at this moment. If we're going to have
2253 any chance of handling watchpoints on local variables, we'll need
2254 the frame chain (so we can determine if we're in scope). */
2255 reinit_frame_cache ();
2256 fr
= find_frame_addr_in_frame_chain (b
->watchpoint_frame
);
2257 within_current_scope
= (fr
!= NULL
);
2258 /* in_function_epilogue_p() returns a non-zero value if we're still
2259 in the function but the stack frame has already been invalidated.
2260 Since we can't rely on the values of local variables after the
2261 stack has been destroyed, we are treating the watchpoint in that
2262 state as `not changed' without further checking. */
2263 if (within_current_scope
&& fr
== get_current_frame ()
2264 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2265 return WP_VALUE_NOT_CHANGED
;
2266 if (within_current_scope
)
2267 /* If we end up stopping, the current frame will get selected
2268 in normal_stop. So this call to select_frame won't affect
2270 select_frame (fr
, -1);
2273 if (within_current_scope
)
2275 /* We use value_{,free_to_}mark because it could be a
2276 *long* time before we return to the command level and
2277 call free_all_values. We can't call free_all_values because
2278 we might be in the middle of evaluating a function call. */
2280 struct value
*mark
= value_mark ();
2281 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2282 if (!value_equal (b
->val
, new_val
))
2284 release_value (new_val
);
2285 value_free_to_mark (mark
);
2286 bs
->old_val
= b
->val
;
2288 /* We will stop here */
2289 return WP_VALUE_CHANGED
;
2293 /* Nothing changed, don't do anything. */
2294 value_free_to_mark (mark
);
2295 /* We won't stop here */
2296 return WP_VALUE_NOT_CHANGED
;
2301 /* This seems like the only logical thing to do because
2302 if we temporarily ignored the watchpoint, then when
2303 we reenter the block in which it is valid it contains
2304 garbage (in the case of a function, it may have two
2305 garbage values, one before and one after the prologue).
2306 So we can't even detect the first assignment to it and
2307 watch after that (since the garbage may or may not equal
2308 the first value assigned). */
2309 /* We print all the stop information in print_it_typical(), but
2310 in this case, by the time we call print_it_typical() this bp
2311 will be deleted already. So we have no choice but print the
2312 information here. */
2313 if (ui_out_is_mi_like_p (uiout
))
2314 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2315 ui_out_text (uiout
, "\nWatchpoint ");
2316 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2317 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2318 which its expression is valid.\n");
2320 if (b
->related_breakpoint
)
2321 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2322 b
->disposition
= disp_del_at_next_stop
;
2328 /* Get a bpstat associated with having just stopped at address *PC
2329 and frame address CORE_ADDRESS. Update *PC to point at the
2330 breakpoint (if we hit a breakpoint). NOT_A_BREAKPOINT is nonzero
2331 if this is known to not be a real breakpoint (it could still be a
2332 watchpoint, though). */
2334 /* Determine whether we stopped at a breakpoint, etc, or whether we
2335 don't understand this stop. Result is a chain of bpstat's such that:
2337 if we don't understand the stop, the result is a null pointer.
2339 if we understand why we stopped, the result is not null.
2341 Each element of the chain refers to a particular breakpoint or
2342 watchpoint at which we have stopped. (We may have stopped for
2343 several reasons concurrently.)
2345 Each element of the chain has valid next, breakpoint_at,
2346 commands, FIXME??? fields. */
2349 bpstat_stop_status (CORE_ADDR
*pc
, int not_a_breakpoint
)
2351 register struct breakpoint
*b
, *temp
;
2353 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2354 int real_breakpoint
= 0;
2355 /* Root of the chain of bpstat's */
2356 struct bpstats root_bs
[1];
2357 /* Pointer to the last thing in the chain currently. */
2358 bpstat bs
= root_bs
;
2359 static char message1
[] =
2360 "Error evaluating expression for watchpoint %d\n";
2361 char message
[sizeof (message1
) + 30 /* slop */ ];
2363 /* Get the address where the breakpoint would have been.
2364 The "not_a_breakpoint" argument is meant to distinguish
2365 between a breakpoint trap event and a trace/singlestep
2366 trap event. For a trace/singlestep trap event, we would
2367 not want to subtract DECR_PC_AFTER_BREAK from the PC. */
2369 bp_addr
= *pc
- (not_a_breakpoint
&& !SOFTWARE_SINGLE_STEP_P () ?
2370 0 : DECR_PC_AFTER_BREAK
);
2372 ALL_BREAKPOINTS_SAFE (b
, temp
)
2374 if (b
->enable_state
== bp_disabled
2375 || b
->enable_state
== bp_shlib_disabled
2376 || b
->enable_state
== bp_call_disabled
)
2379 if (b
->type
!= bp_watchpoint
2380 && b
->type
!= bp_hardware_watchpoint
2381 && b
->type
!= bp_read_watchpoint
2382 && b
->type
!= bp_access_watchpoint
2383 && b
->type
!= bp_hardware_breakpoint
2384 && b
->type
!= bp_catch_fork
2385 && b
->type
!= bp_catch_vfork
2386 && b
->type
!= bp_catch_exec
2387 && b
->type
!= bp_catch_catch
2388 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2389 if (b
->address
!= bp_addr
|| /* address doesn't match or */
2390 (overlay_debugging
&& /* overlay doesn't match */
2391 section_is_overlay (b
->section
) &&
2392 !section_is_mapped (b
->section
)))
2395 if (b
->type
== bp_hardware_breakpoint
2396 && b
->address
!= (*pc
- DECR_PC_AFTER_HW_BREAK
))
2399 /* Is this a catchpoint of a load or unload? If so, did we
2400 get a load or unload of the specified library? If not,
2402 if ((b
->type
== bp_catch_load
)
2403 #if defined(SOLIB_HAVE_LOAD_EVENT)
2404 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2405 || ((b
->dll_pathname
!= NULL
)
2406 && (strcmp (b
->dll_pathname
,
2407 SOLIB_LOADED_LIBRARY_PATHNAME (
2408 PIDGET (inferior_ptid
)))
2414 if ((b
->type
== bp_catch_unload
)
2415 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2416 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2417 || ((b
->dll_pathname
!= NULL
)
2418 && (strcmp (b
->dll_pathname
,
2419 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2420 PIDGET (inferior_ptid
)))
2426 if ((b
->type
== bp_catch_fork
)
2427 && !target_has_forked (PIDGET (inferior_ptid
),
2428 &b
->forked_inferior_pid
))
2431 if ((b
->type
== bp_catch_vfork
)
2432 && !target_has_vforked (PIDGET (inferior_ptid
),
2433 &b
->forked_inferior_pid
))
2436 if ((b
->type
== bp_catch_exec
)
2437 && !target_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2440 if (ep_is_exception_catchpoint (b
) &&
2441 !(current_exception_event
= target_get_current_exception_event ()))
2444 /* Come here if it's a watchpoint, or if the break address matches */
2446 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2448 /* Watchpoints may change this, if not found to have triggered. */
2452 sprintf (message
, message1
, b
->number
);
2453 if (b
->type
== bp_watchpoint
||
2454 b
->type
== bp_hardware_watchpoint
)
2456 switch (catch_errors (watchpoint_check
, bs
, message
,
2460 /* We've already printed what needs to be printed. */
2461 /* Actually this is superfluous, because by the time we
2462 call print_it_typical() the wp will be already deleted,
2463 and the function will return immediately. */
2464 bs
->print_it
= print_it_done
;
2467 case WP_VALUE_CHANGED
:
2471 case WP_VALUE_NOT_CHANGED
:
2473 bs
->print_it
= print_it_noop
;
2480 /* Error from catch_errors. */
2481 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2482 if (b
->related_breakpoint
)
2483 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2484 b
->disposition
= disp_del_at_next_stop
;
2485 /* We've already printed what needs to be printed. */
2486 bs
->print_it
= print_it_done
;
2492 else if (b
->type
== bp_read_watchpoint
||
2493 b
->type
== bp_access_watchpoint
)
2499 addr
= target_stopped_data_address ();
2502 for (v
= b
->val_chain
; v
; v
= v
->next
)
2504 if (VALUE_LVAL (v
) == lval_memory
2505 && ! VALUE_LAZY (v
))
2507 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
2509 if (v
== b
->val_chain
2510 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2511 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2515 vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
2516 /* Exact match not required. Within range is
2518 if (addr
>= vaddr
&&
2519 addr
< vaddr
+ TYPE_LENGTH (VALUE_TYPE (v
)))
2525 switch (catch_errors (watchpoint_check
, bs
, message
,
2529 /* We've already printed what needs to be printed. */
2530 bs
->print_it
= print_it_done
;
2533 case WP_VALUE_CHANGED
:
2534 if (b
->type
== bp_read_watchpoint
)
2536 /* Don't stop: read watchpoints shouldn't fire if
2537 the value has changed. This is for targets which
2538 cannot set read-only watchpoints. */
2539 bs
->print_it
= print_it_noop
;
2545 case WP_VALUE_NOT_CHANGED
:
2552 /* Error from catch_errors. */
2553 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2554 if (b
->related_breakpoint
)
2555 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2556 b
->disposition
= disp_del_at_next_stop
;
2557 /* We've already printed what needs to be printed. */
2558 bs
->print_it
= print_it_done
;
2561 else /* found == 0 */
2563 /* This is a case where some watchpoint(s) triggered,
2564 but not at the address of this watchpoint (FOUND
2565 was left zero). So don't print anything for this
2567 bs
->print_it
= print_it_noop
;
2574 /* By definition, an encountered breakpoint is a triggered
2578 real_breakpoint
= 1;
2582 b
->frame
!= (get_current_frame ())->frame
)
2586 int value_is_zero
= 0;
2590 /* Need to select the frame, with all that implies
2591 so that the conditions will have the right context. */
2592 select_frame (get_current_frame (), 0);
2594 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2595 "Error in testing breakpoint condition:\n",
2597 /* FIXME-someday, should give breakpoint # */
2600 if (b
->cond
&& value_is_zero
)
2603 /* Don't consider this a hit. */
2606 else if (b
->ignore_count
> 0)
2609 annotate_ignore_count_change ();
2614 /* We will stop here */
2615 if (b
->disposition
== disp_disable
)
2616 b
->enable_state
= bp_disabled
;
2617 bs
->commands
= b
->commands
;
2621 (STREQ ("silent", bs
->commands
->line
) ||
2622 (xdb_commands
&& STREQ ("Q", bs
->commands
->line
))))
2624 bs
->commands
= bs
->commands
->next
;
2629 /* Print nothing for this entry if we dont stop or if we dont print. */
2630 if (bs
->stop
== 0 || bs
->print
== 0)
2631 bs
->print_it
= print_it_noop
;
2634 bs
->next
= NULL
; /* Terminate the chain */
2635 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2637 if (real_breakpoint
&& bs
)
2639 if (bs
->breakpoint_at
->type
== bp_hardware_breakpoint
)
2641 if (DECR_PC_AFTER_HW_BREAK
!= 0)
2643 *pc
= *pc
- DECR_PC_AFTER_HW_BREAK
;
2649 if (DECR_PC_AFTER_BREAK
!= 0 || must_shift_inst_regs
)
2652 #if defined (SHIFT_INST_REGS)
2654 #else /* No SHIFT_INST_REGS. */
2656 #endif /* No SHIFT_INST_REGS. */
2661 /* The value of a hardware watchpoint hasn't changed, but the
2662 intermediate memory locations we are watching may have. */
2663 if (bs
&& !bs
->stop
&&
2664 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2665 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2666 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2668 remove_breakpoints ();
2669 insert_breakpoints ();
2674 /* Tell what to do about this bpstat. */
2676 bpstat_what (bpstat bs
)
2678 /* Classify each bpstat as one of the following. */
2681 /* This bpstat element has no effect on the main_action. */
2684 /* There was a watchpoint, stop but don't print. */
2687 /* There was a watchpoint, stop and print. */
2690 /* There was a breakpoint but we're not stopping. */
2693 /* There was a breakpoint, stop but don't print. */
2696 /* There was a breakpoint, stop and print. */
2699 /* We hit the longjmp breakpoint. */
2702 /* We hit the longjmp_resume breakpoint. */
2705 /* We hit the step_resume breakpoint. */
2708 /* We hit the through_sigtramp breakpoint. */
2711 /* We hit the shared library event breakpoint. */
2714 /* We caught a shared library event. */
2717 /* This is just used to count how many enums there are. */
2721 /* Here is the table which drives this routine. So that we can
2722 format it pretty, we define some abbreviations for the
2723 enum bpstat_what codes. */
2724 #define kc BPSTAT_WHAT_KEEP_CHECKING
2725 #define ss BPSTAT_WHAT_STOP_SILENT
2726 #define sn BPSTAT_WHAT_STOP_NOISY
2727 #define sgl BPSTAT_WHAT_SINGLE
2728 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2729 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2730 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2731 #define sr BPSTAT_WHAT_STEP_RESUME
2732 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2733 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2734 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2736 /* "Can't happen." Might want to print an error message.
2737 abort() is not out of the question, but chances are GDB is just
2738 a bit confused, not unusable. */
2739 #define err BPSTAT_WHAT_STOP_NOISY
2741 /* Given an old action and a class, come up with a new action. */
2742 /* One interesting property of this table is that wp_silent is the same
2743 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2744 after stopping, the check for whether to step over a breakpoint
2745 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2746 reference to how we stopped. We retain separate wp_silent and
2747 bp_silent codes in case we want to change that someday.
2749 Another possibly interesting property of this table is that
2750 there's a partial ordering, priority-like, of the actions. Once
2751 you've decided that some action is appropriate, you'll never go
2752 back and decide something of a lower priority is better. The
2755 kc < clr sgl shl shlr slr sn sr ss ts
2756 sgl < clrs shl shlr slr sn sr ss ts
2757 slr < err shl shlr sn sr ss ts
2758 clr < clrs err shl shlr sn sr ss ts
2759 clrs < err shl shlr sn sr ss ts
2760 ss < shl shlr sn sr ts
2767 What I think this means is that we don't need a damned table
2768 here. If you just put the rows and columns in the right order,
2769 it'd look awfully regular. We could simply walk the bpstat list
2770 and choose the highest priority action we find, with a little
2771 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2772 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2773 is messy anyway). */
2775 /* step_resume entries: a step resume breakpoint overrides another
2776 breakpoint of signal handling (see comment in wait_for_inferior
2777 at first IN_SIGTRAMP where we set the step_resume breakpoint). */
2778 /* We handle the through_sigtramp_breakpoint the same way; having both
2779 one of those and a step_resume_breakpoint is probably very rare (?). */
2781 static const enum bpstat_what_main_action
2782 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
2785 /* kc ss sn sgl slr clr clrs sr ts shl shlr
2788 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
2790 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
2792 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
2794 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
2796 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
2798 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
2800 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
2802 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
2804 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
2806 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
2808 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
2810 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
2825 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
2826 struct bpstat_what retval
;
2828 retval
.call_dummy
= 0;
2829 for (; bs
!= NULL
; bs
= bs
->next
)
2831 enum class bs_class
= no_effect
;
2832 if (bs
->breakpoint_at
== NULL
)
2833 /* I suspect this can happen if it was a momentary breakpoint
2834 which has since been deleted. */
2836 switch (bs
->breakpoint_at
->type
)
2842 case bp_hardware_breakpoint
:
2848 bs_class
= bp_noisy
;
2850 bs_class
= bp_silent
;
2853 bs_class
= bp_nostop
;
2856 case bp_hardware_watchpoint
:
2857 case bp_read_watchpoint
:
2858 case bp_access_watchpoint
:
2862 bs_class
= wp_noisy
;
2864 bs_class
= wp_silent
;
2867 /* There was a watchpoint, but we're not stopping.
2868 This requires no further action. */
2869 bs_class
= no_effect
;
2872 bs_class
= long_jump
;
2874 case bp_longjmp_resume
:
2875 bs_class
= long_resume
;
2877 case bp_step_resume
:
2880 bs_class
= step_resume
;
2883 /* It is for the wrong frame. */
2884 bs_class
= bp_nostop
;
2886 case bp_through_sigtramp
:
2887 bs_class
= through_sig
;
2889 case bp_watchpoint_scope
:
2890 bs_class
= bp_nostop
;
2892 case bp_shlib_event
:
2893 bs_class
= shlib_event
;
2895 case bp_thread_event
:
2896 bs_class
= bp_nostop
;
2899 case bp_catch_unload
:
2900 /* Only if this catchpoint triggered should we cause the
2901 step-out-of-dld behaviour. Otherwise, we ignore this
2904 bs_class
= catch_shlib_event
;
2906 bs_class
= no_effect
;
2909 case bp_catch_vfork
:
2914 bs_class
= bp_noisy
;
2916 bs_class
= bp_silent
;
2919 /* There was a catchpoint, but we're not stopping.
2920 This requires no further action. */
2921 bs_class
= no_effect
;
2923 case bp_catch_catch
:
2924 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
2925 bs_class
= bp_nostop
;
2927 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
2929 case bp_catch_throw
:
2930 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
2931 bs_class
= bp_nostop
;
2933 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
2936 /* Make sure the action is stop (silent or noisy),
2937 so infrun.c pops the dummy frame. */
2938 bs_class
= bp_silent
;
2939 retval
.call_dummy
= 1;
2942 current_action
= table
[(int) bs_class
][(int) current_action
];
2944 retval
.main_action
= current_action
;
2948 /* Nonzero if we should step constantly (e.g. watchpoints on machines
2949 without hardware support). This isn't related to a specific bpstat,
2950 just to things like whether watchpoints are set. */
2953 bpstat_should_step (void)
2955 struct breakpoint
*b
;
2957 if (b
->enable_state
== bp_enabled
&& b
->type
== bp_watchpoint
)
2962 /* Nonzero if there are enabled hardware watchpoints. */
2964 bpstat_have_active_hw_watchpoints (void)
2966 struct breakpoint
*b
;
2968 if ((b
->enable_state
== bp_enabled
) &&
2970 ((b
->type
== bp_hardware_watchpoint
) ||
2971 (b
->type
== bp_read_watchpoint
) ||
2972 (b
->type
== bp_access_watchpoint
)))
2978 /* Given a bpstat that records zero or more triggered eventpoints, this
2979 function returns another bpstat which contains only the catchpoints
2980 on that first list, if any. */
2982 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
2984 struct bpstats root_bs
[1];
2985 bpstat bs
= root_bs
;
2986 struct breakpoint
*ep
;
2989 bpstat_clear (cp_list
);
2990 root_bs
->next
= NULL
;
2992 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
2994 /* Is this eventpoint a catchpoint? If not, ignore it. */
2995 ep
= ep_list
->breakpoint_at
;
2998 if ((ep
->type
!= bp_catch_load
) &&
2999 (ep
->type
!= bp_catch_unload
) &&
3000 (ep
->type
!= bp_catch_catch
) &&
3001 (ep
->type
!= bp_catch_throw
))
3002 /* pai: (temp) ADD fork/vfork here!! */
3005 /* Yes; add it to the list. */
3006 bs
= bpstat_alloc (ep
, bs
);
3011 #if defined(SOLIB_ADD)
3012 /* Also, for each triggered catchpoint, tag it with the name of
3013 the library that caused this trigger. (We copy the name now,
3014 because it's only guaranteed to be available NOW, when the
3015 catchpoint triggers. Clients who may wish to know the name
3016 later must get it from the catchpoint itself.) */
3017 if (ep
->triggered_dll_pathname
!= NULL
)
3018 xfree (ep
->triggered_dll_pathname
);
3019 if (ep
->type
== bp_catch_load
)
3020 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3021 PIDGET (inferior_ptid
));
3023 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3024 PIDGET (inferior_ptid
));
3026 dll_pathname
= NULL
;
3030 ep
->triggered_dll_pathname
= (char *)
3031 xmalloc (strlen (dll_pathname
) + 1);
3032 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3035 ep
->triggered_dll_pathname
= NULL
;
3041 /* Print B to gdb_stdout. */
3043 print_one_breakpoint (struct breakpoint
*b
,
3044 CORE_ADDR
*last_addr
)
3046 register struct command_line
*l
;
3047 register struct symbol
*sym
;
3048 struct ep_type_description
3053 static struct ep_type_description bptypes
[] =
3055 {bp_none
, "?deleted?"},
3056 {bp_breakpoint
, "breakpoint"},
3057 {bp_hardware_breakpoint
, "hw breakpoint"},
3058 {bp_until
, "until"},
3059 {bp_finish
, "finish"},
3060 {bp_watchpoint
, "watchpoint"},
3061 {bp_hardware_watchpoint
, "hw watchpoint"},
3062 {bp_read_watchpoint
, "read watchpoint"},
3063 {bp_access_watchpoint
, "acc watchpoint"},
3064 {bp_longjmp
, "longjmp"},
3065 {bp_longjmp_resume
, "longjmp resume"},
3066 {bp_step_resume
, "step resume"},
3067 {bp_through_sigtramp
, "sigtramp"},
3068 {bp_watchpoint_scope
, "watchpoint scope"},
3069 {bp_call_dummy
, "call dummy"},
3070 {bp_shlib_event
, "shlib events"},
3071 {bp_thread_event
, "thread events"},
3072 {bp_catch_load
, "catch load"},
3073 {bp_catch_unload
, "catch unload"},
3074 {bp_catch_fork
, "catch fork"},
3075 {bp_catch_vfork
, "catch vfork"},
3076 {bp_catch_exec
, "catch exec"},
3077 {bp_catch_catch
, "catch catch"},
3078 {bp_catch_throw
, "catch throw"}
3081 static char *bpdisps
[] =
3082 {"del", "dstp", "dis", "keep"};
3083 static char bpenables
[] = "nynny";
3084 char wrap_indent
[80];
3085 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3086 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3089 ui_out_tuple_begin (uiout
, "bkpt");
3093 ui_out_field_int (uiout
, "number", b
->number
);
3097 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3098 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3099 internal_error (__FILE__
, __LINE__
,
3100 "bptypes table does not describe type #%d.",
3102 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3106 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3110 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3111 ui_out_spaces (uiout
, 2);
3114 strcpy (wrap_indent
, " ");
3117 if (TARGET_ADDR_BIT
<= 32)
3118 strcat (wrap_indent
, " ");
3120 strcat (wrap_indent
, " ");
3125 internal_error (__FILE__
, __LINE__
,
3126 "print_one_breakpoint: bp_none encountered\n");
3130 case bp_hardware_watchpoint
:
3131 case bp_read_watchpoint
:
3132 case bp_access_watchpoint
:
3133 /* Field 4, the address, is omitted (which makes the columns
3134 not line up too nicely with the headers, but the effect
3135 is relatively readable). */
3137 ui_out_field_skip (uiout
, "addr");
3139 print_expression (b
->exp
, stb
->stream
);
3140 ui_out_field_stream (uiout
, "what", stb
);
3144 case bp_catch_unload
:
3145 /* Field 4, the address, is omitted (which makes the columns
3146 not line up too nicely with the headers, but the effect
3147 is relatively readable). */
3149 ui_out_field_skip (uiout
, "addr");
3151 if (b
->dll_pathname
== NULL
)
3153 ui_out_field_string (uiout
, "what", "<any library>");
3154 ui_out_spaces (uiout
, 1);
3158 ui_out_text (uiout
, "library \"");
3159 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3160 ui_out_text (uiout
, "\" ");
3165 case bp_catch_vfork
:
3166 /* Field 4, the address, is omitted (which makes the columns
3167 not line up too nicely with the headers, but the effect
3168 is relatively readable). */
3170 ui_out_field_skip (uiout
, "addr");
3172 if (b
->forked_inferior_pid
!= 0)
3174 ui_out_text (uiout
, "process ");
3175 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3176 ui_out_spaces (uiout
, 1);
3180 /* Field 4, the address, is omitted (which makes the columns
3181 not line up too nicely with the headers, but the effect
3182 is relatively readable). */
3184 ui_out_field_skip (uiout
, "addr");
3186 if (b
->exec_pathname
!= NULL
)
3188 ui_out_text (uiout
, "program \"");
3189 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3190 ui_out_text (uiout
, "\" ");
3194 case bp_catch_catch
:
3195 /* Field 4, the address, is omitted (which makes the columns
3196 not line up too nicely with the headers, but the effect
3197 is relatively readable). */
3199 ui_out_field_skip (uiout
, "addr");
3201 ui_out_field_string (uiout
, "what", "exception catch");
3202 ui_out_spaces (uiout
, 1);
3205 case bp_catch_throw
:
3206 /* Field 4, the address, is omitted (which makes the columns
3207 not line up too nicely with the headers, but the effect
3208 is relatively readable). */
3210 ui_out_field_skip (uiout
, "addr");
3212 ui_out_field_string (uiout
, "what", "exception throw");
3213 ui_out_spaces (uiout
, 1);
3217 case bp_hardware_breakpoint
:
3221 case bp_longjmp_resume
:
3222 case bp_step_resume
:
3223 case bp_through_sigtramp
:
3224 case bp_watchpoint_scope
:
3226 case bp_shlib_event
:
3227 case bp_thread_event
:
3231 ui_out_field_core_addr (uiout
, "addr", b
->address
);
3234 *last_addr
= b
->address
;
3237 sym
= find_pc_sect_function (b
->address
, b
->section
);
3240 ui_out_text (uiout
, "in ");
3241 ui_out_field_string (uiout
, "func",
3242 SYMBOL_SOURCE_NAME (sym
));
3243 ui_out_wrap_hint (uiout
, wrap_indent
);
3244 ui_out_text (uiout
, " at ");
3246 ui_out_field_string (uiout
, "file", b
->source_file
);
3247 ui_out_text (uiout
, ":");
3248 ui_out_field_int (uiout
, "line", b
->line_number
);
3252 print_address_symbolic (b
->address
, stb
->stream
, demangle
, "");
3253 ui_out_field_stream (uiout
, "at", stb
);
3258 if (b
->thread
!= -1)
3260 /* FIXME: This seems to be redundant and lost here; see the
3261 "stop only in" line a little further down. */
3262 ui_out_text (uiout
, " thread ");
3263 ui_out_field_int (uiout
, "thread", b
->thread
);
3266 ui_out_text (uiout
, "\n");
3271 ui_out_text (uiout
, "\tstop only in stack frame at ");
3272 ui_out_field_core_addr (uiout
, "frame", b
->frame
);
3273 ui_out_text (uiout
, "\n");
3279 ui_out_text (uiout
, "\tstop only if ");
3280 print_expression (b
->cond
, stb
->stream
);
3281 ui_out_field_stream (uiout
, "cond", stb
);
3282 ui_out_text (uiout
, "\n");
3285 if (b
->thread
!= -1)
3287 /* FIXME should make an annotation for this */
3288 ui_out_text (uiout
, "\tstop only in thread ");
3289 ui_out_field_int (uiout
, "thread", b
->thread
);
3290 ui_out_text (uiout
, "\n");
3293 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3295 /* FIXME should make an annotation for this */
3296 if (ep_is_catchpoint (b
))
3297 ui_out_text (uiout
, "\tcatchpoint");
3299 ui_out_text (uiout
, "\tbreakpoint");
3300 ui_out_text (uiout
, " already hit ");
3301 ui_out_field_int (uiout
, "times", b
->hit_count
);
3302 if (b
->hit_count
== 1)
3303 ui_out_text (uiout
, " time\n");
3305 ui_out_text (uiout
, " times\n");
3308 /* Output the count also if it is zero, but only if this is
3309 mi. FIXME: Should have a better test for this. */
3310 if (ui_out_is_mi_like_p (uiout
))
3311 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3312 ui_out_field_int (uiout
, "times", b
->hit_count
);
3314 if (b
->ignore_count
)
3317 ui_out_text (uiout
, "\tignore next ");
3318 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3319 ui_out_text (uiout
, " hits\n");
3322 if ((l
= b
->commands
))
3325 ui_out_tuple_begin (uiout
, "script");
3326 print_command_lines (uiout
, l
, 4);
3327 ui_out_tuple_end (uiout
);
3329 ui_out_tuple_end (uiout
);
3330 do_cleanups (old_chain
);
3333 struct captured_breakpoint_query_args
3339 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3341 struct captured_breakpoint_query_args
*args
= data
;
3342 register struct breakpoint
*b
;
3343 CORE_ADDR dummy_addr
= 0;
3346 if (args
->bnum
== b
->number
)
3348 print_one_breakpoint (b
, &dummy_addr
);
3356 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
)
3358 struct captured_breakpoint_query_args args
;
3360 /* For the moment we don't trust print_one_breakpoint() to not throw
3362 return catch_exceptions (uiout
, do_captured_breakpoint_query
, &args
,
3363 NULL
, RETURN_MASK_ALL
);
3366 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3367 catchpoints, et.al.). */
3370 user_settable_breakpoint (const struct breakpoint
*b
)
3372 return (b
->type
== bp_breakpoint
3373 || b
->type
== bp_catch_load
3374 || b
->type
== bp_catch_unload
3375 || b
->type
== bp_catch_fork
3376 || b
->type
== bp_catch_vfork
3377 || b
->type
== bp_catch_exec
3378 || b
->type
== bp_catch_catch
3379 || b
->type
== bp_catch_throw
3380 || b
->type
== bp_hardware_breakpoint
3381 || b
->type
== bp_watchpoint
3382 || b
->type
== bp_read_watchpoint
3383 || b
->type
== bp_access_watchpoint
3384 || b
->type
== bp_hardware_watchpoint
);
3387 /* Print information on user settable breakpoint (watchpoint, etc)
3388 number BNUM. If BNUM is -1 print all user settable breakpoints.
3389 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3392 breakpoint_1 (int bnum
, int allflag
)
3394 register struct breakpoint
*b
;
3395 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3396 int nr_printable_breakpoints
;
3398 /* Compute the number of rows in the table. */
3399 nr_printable_breakpoints
= 0;
3402 || bnum
== b
->number
)
3404 if (allflag
|| user_settable_breakpoint (b
))
3405 nr_printable_breakpoints
++;
3409 ui_out_table_begin (uiout
, 6, nr_printable_breakpoints
, "BreakpointTable");
3411 ui_out_table_begin (uiout
, 5, nr_printable_breakpoints
, "BreakpointTable");
3413 if (nr_printable_breakpoints
> 0)
3414 annotate_breakpoints_headers ();
3415 if (nr_printable_breakpoints
> 0)
3417 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3418 if (nr_printable_breakpoints
> 0)
3420 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3421 if (nr_printable_breakpoints
> 0)
3423 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3424 if (nr_printable_breakpoints
> 0)
3426 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3429 if (nr_printable_breakpoints
> 0)
3431 if (TARGET_ADDR_BIT
<= 32)
3432 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3434 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3436 if (nr_printable_breakpoints
> 0)
3438 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3439 ui_out_table_body (uiout
);
3440 if (nr_printable_breakpoints
> 0)
3441 annotate_breakpoints_table ();
3445 || bnum
== b
->number
)
3447 /* We only print out user settable breakpoints unless the
3449 if (allflag
|| user_settable_breakpoint (b
))
3450 print_one_breakpoint (b
, &last_addr
);
3453 ui_out_table_end (uiout
);
3455 if (nr_printable_breakpoints
== 0)
3458 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3460 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3465 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3466 that a comparison of an unsigned with -1 is always false. */
3467 if (last_addr
!= (CORE_ADDR
) -1)
3468 set_next_address (last_addr
);
3471 /* FIXME? Should this be moved up so that it is only called when
3472 there have been breakpoints? */
3473 annotate_breakpoints_table_end ();
3478 breakpoints_info (char *bnum_exp
, int from_tty
)
3483 bnum
= parse_and_eval_long (bnum_exp
);
3485 breakpoint_1 (bnum
, 0);
3490 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3495 bnum
= parse_and_eval_long (bnum_exp
);
3497 breakpoint_1 (bnum
, 1);
3500 /* Print a message describing any breakpoints set at PC. */
3503 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3505 register int others
= 0;
3506 register struct breakpoint
*b
;
3509 if (b
->address
== pc
)
3510 if (overlay_debugging
== 0 ||
3511 b
->section
== section
)
3515 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3517 if (b
->address
== pc
)
3518 if (overlay_debugging
== 0 ||
3519 b
->section
== section
)
3522 printf_filtered ("%d%s%s ",
3524 ((b
->enable_state
== bp_disabled
||
3525 b
->enable_state
== bp_shlib_disabled
||
3526 b
->enable_state
== bp_call_disabled
) ? " (disabled)"
3527 : b
->enable_state
== bp_permanent
? " (permanent)"
3530 : ((others
== 1) ? " and" : ""));
3532 printf_filtered ("also set at pc ");
3533 print_address_numeric (pc
, 1, gdb_stdout
);
3534 printf_filtered (".\n");
3538 /* Set the default place to put a breakpoint
3539 for the `break' command with no arguments. */
3542 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3545 default_breakpoint_valid
= valid
;
3546 default_breakpoint_address
= addr
;
3547 default_breakpoint_symtab
= symtab
;
3548 default_breakpoint_line
= line
;
3551 /* Return true iff it is meaningful to use the address member of
3552 BPT. For some breakpoint types, the address member is irrelevant
3553 and it makes no sense to attempt to compare it to other addresses
3554 (or use it for any other purpose either).
3556 More specifically, each of the following breakpoint types will always
3557 have a zero valued address and we don't want check_duplicates() to mark
3558 breakpoints of any of these types to be a duplicate of an actual
3559 breakpoint at address zero:
3562 bp_hardware_watchpoint
3564 bp_access_watchpoint
3571 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3573 enum bptype type
= bpt
->type
;
3575 return (type
!= bp_watchpoint
3576 && type
!= bp_hardware_watchpoint
3577 && type
!= bp_read_watchpoint
3578 && type
!= bp_access_watchpoint
3579 && type
!= bp_catch_exec
3580 && type
!= bp_longjmp_resume
3581 && type
!= bp_catch_fork
3582 && type
!= bp_catch_vfork
);
3585 /* Rescan breakpoints at the same address and section as BPT,
3586 marking the first one as "first" and any others as "duplicates".
3587 This is so that the bpt instruction is only inserted once.
3588 If we have a permanent breakpoint at the same place as BPT, make
3589 that one the official one, and the rest as duplicates. */
3592 check_duplicates (struct breakpoint
*bpt
)
3594 register struct breakpoint
*b
;
3595 register int count
= 0;
3596 struct breakpoint
*perm_bp
= 0;
3597 CORE_ADDR address
= bpt
->address
;
3598 asection
*section
= bpt
->section
;
3600 if (! breakpoint_address_is_meaningful (bpt
))
3604 if (b
->enable_state
!= bp_disabled
3605 && b
->enable_state
!= bp_shlib_disabled
3606 && b
->enable_state
!= bp_call_disabled
3607 && b
->address
== address
3608 && (overlay_debugging
== 0 || b
->section
== section
)
3609 && breakpoint_address_is_meaningful (b
))
3611 /* Have we found a permanent breakpoint? */
3612 if (b
->enable_state
== bp_permanent
)
3619 b
->duplicate
= count
> 1;
3622 /* If we found a permanent breakpoint at this address, go over the
3623 list again and declare all the other breakpoints there to be the
3627 perm_bp
->duplicate
= 0;
3629 /* Permanent breakpoint should always be inserted. */
3630 if (! perm_bp
->inserted
)
3631 internal_error (__FILE__
, __LINE__
,
3632 "allegedly permanent breakpoint is not "
3633 "actually inserted");
3639 internal_error (__FILE__
, __LINE__
,
3640 "another breakpoint was inserted on top of "
3641 "a permanent breakpoint");
3643 if (b
->enable_state
!= bp_disabled
3644 && b
->enable_state
!= bp_shlib_disabled
3645 && b
->enable_state
!= bp_call_disabled
3646 && b
->address
== address
3647 && (overlay_debugging
== 0 || b
->section
== section
)
3648 && breakpoint_address_is_meaningful (b
))
3654 /* set_raw_breakpoint() is a low level routine for allocating and
3655 partially initializing a breakpoint of type BPTYPE. The newly
3656 created breakpoint's address, section, source file name, and line
3657 number are provided by SAL. The newly created and partially
3658 initialized breakpoint is added to the breakpoint chain and
3659 is also returned as the value of this function.
3661 It is expected that the caller will complete the initialization of
3662 the newly created breakpoint struct as well as output any status
3663 information regarding the creation of a new breakpoint. In
3664 particular, set_raw_breakpoint() does NOT set the breakpoint
3665 number! Care should be taken to not allow an error() to occur
3666 prior to completing the initialization of the breakpoint. If this
3667 should happen, a bogus breakpoint will be left on the chain. */
3670 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
3672 register struct breakpoint
*b
, *b1
;
3674 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
3675 memset (b
, 0, sizeof (*b
));
3676 b
->address
= sal
.pc
;
3677 if (sal
.symtab
== NULL
)
3678 b
->source_file
= NULL
;
3680 b
->source_file
= savestring (sal
.symtab
->filename
,
3681 strlen (sal
.symtab
->filename
));
3682 b
->section
= sal
.section
;
3684 b
->language
= current_language
->la_language
;
3685 b
->input_radix
= input_radix
;
3687 b
->line_number
= sal
.line
;
3688 b
->enable_state
= bp_enabled
;
3691 b
->ignore_count
= 0;
3694 b
->dll_pathname
= NULL
;
3695 b
->triggered_dll_pathname
= NULL
;
3696 b
->forked_inferior_pid
= 0;
3697 b
->exec_pathname
= NULL
;
3699 /* Add this breakpoint to the end of the chain
3700 so that a list of breakpoints will come out in order
3701 of increasing numbers. */
3703 b1
= breakpoint_chain
;
3705 breakpoint_chain
= b
;
3713 check_duplicates (b
);
3714 breakpoints_changed ();
3720 /* Note that the breakpoint object B describes a permanent breakpoint
3721 instruction, hard-wired into the inferior's code. */
3723 make_breakpoint_permanent (struct breakpoint
*b
)
3725 b
->enable_state
= bp_permanent
;
3727 /* By definition, permanent breakpoints are already present in the code. */
3731 #ifdef GET_LONGJMP_TARGET
3734 create_longjmp_breakpoint (char *func_name
)
3736 struct symtab_and_line sal
;
3737 struct breakpoint
*b
;
3739 INIT_SAL (&sal
); /* initialize to zeroes */
3740 if (func_name
!= NULL
)
3742 struct minimal_symbol
*m
;
3744 m
= lookup_minimal_symbol_text (func_name
, NULL
,
3745 (struct objfile
*) NULL
);
3747 sal
.pc
= SYMBOL_VALUE_ADDRESS (m
);
3751 sal
.section
= find_pc_overlay (sal
.pc
);
3752 b
= set_raw_breakpoint (sal
,
3753 func_name
!= NULL
? bp_longjmp
: bp_longjmp_resume
);
3755 b
->disposition
= disp_donttouch
;
3756 b
->enable_state
= bp_disabled
;
3759 b
->addr_string
= xstrdup (func_name
);
3760 b
->number
= internal_breakpoint_number
--;
3763 #endif /* #ifdef GET_LONGJMP_TARGET */
3765 /* Call this routine when stepping and nexting to enable a breakpoint
3766 if we do a longjmp(). When we hit that breakpoint, call
3767 set_longjmp_resume_breakpoint() to figure out where we are going. */
3770 enable_longjmp_breakpoint (void)
3772 register struct breakpoint
*b
;
3775 if (b
->type
== bp_longjmp
)
3777 b
->enable_state
= bp_enabled
;
3778 check_duplicates (b
);
3783 disable_longjmp_breakpoint (void)
3785 register struct breakpoint
*b
;
3788 if (b
->type
== bp_longjmp
3789 || b
->type
== bp_longjmp_resume
)
3791 b
->enable_state
= bp_disabled
;
3792 check_duplicates (b
);
3797 create_thread_event_breakpoint (CORE_ADDR address
)
3799 struct breakpoint
*b
;
3800 struct symtab_and_line sal
;
3801 char addr_string
[80]; /* Surely an addr can't be longer than that. */
3803 INIT_SAL (&sal
); /* initialize to zeroes */
3805 sal
.section
= find_pc_overlay (sal
.pc
);
3806 b
= set_raw_breakpoint (sal
, bp_thread_event
);
3808 b
->number
= internal_breakpoint_number
--;
3809 b
->disposition
= disp_donttouch
;
3810 b
->enable_state
= bp_enabled
;
3811 /* addr_string has to be used or breakpoint_re_set will delete me. */
3812 sprintf (addr_string
, "*0x%s", paddr (b
->address
));
3813 b
->addr_string
= xstrdup (addr_string
);
3819 remove_thread_event_breakpoints (void)
3821 struct breakpoint
*b
, *temp
;
3823 ALL_BREAKPOINTS_SAFE (b
, temp
)
3824 if (b
->type
== bp_thread_event
)
3825 delete_breakpoint (b
);
3830 remove_solib_event_breakpoints (void)
3832 register struct breakpoint
*b
, *temp
;
3834 ALL_BREAKPOINTS_SAFE (b
, temp
)
3835 if (b
->type
== bp_shlib_event
)
3836 delete_breakpoint (b
);
3840 create_solib_event_breakpoint (CORE_ADDR address
)
3842 struct breakpoint
*b
;
3843 struct symtab_and_line sal
;
3845 INIT_SAL (&sal
); /* initialize to zeroes */
3847 sal
.section
= find_pc_overlay (sal
.pc
);
3848 b
= set_raw_breakpoint (sal
, bp_shlib_event
);
3849 b
->number
= internal_breakpoint_number
--;
3850 b
->disposition
= disp_donttouch
;
3855 /* Disable any breakpoints that are on code in shared libraries. Only
3856 apply to enabled breakpoints, disabled ones can just stay disabled. */
3859 disable_breakpoints_in_shlibs (int silent
)
3861 struct breakpoint
*b
;
3862 int disabled_shlib_breaks
= 0;
3864 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
3867 #if defined (PC_SOLIB)
3868 if (((b
->type
== bp_breakpoint
) ||
3869 (b
->type
== bp_hardware_breakpoint
)) &&
3870 b
->enable_state
== bp_enabled
&&
3872 PC_SOLIB (b
->address
))
3874 b
->enable_state
= bp_shlib_disabled
;
3877 if (!disabled_shlib_breaks
)
3879 target_terminal_ours_for_output ();
3880 warning ("Temporarily disabling shared library breakpoints:");
3882 disabled_shlib_breaks
= 1;
3883 warning ("breakpoint #%d ", b
->number
);
3890 /* Try to reenable any breakpoints in shared libraries. */
3892 re_enable_breakpoints_in_shlibs (void)
3894 struct breakpoint
*b
;
3897 if (b
->enable_state
== bp_shlib_disabled
)
3901 /* Do not reenable the breakpoint if the shared library
3902 is still not mapped in. */
3903 if (target_read_memory (b
->address
, buf
, 1) == 0)
3904 b
->enable_state
= bp_enabled
;
3911 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
3912 char *cond_string
, enum bptype bp_kind
)
3914 struct breakpoint
*b
;
3915 struct symtabs_and_lines sals
;
3916 struct cleanup
*old_chain
;
3917 struct cleanup
*canonical_strings_chain
= NULL
;
3918 char *addr_start
= hookname
;
3919 char *addr_end
= NULL
;
3920 char **canonical
= (char **) NULL
;
3921 int thread
= -1; /* All threads. */
3923 /* Set a breakpoint on the specified hook. */
3924 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
, 0, &canonical
);
3925 addr_end
= hookname
;
3927 if (sals
.nelts
== 0)
3929 warning ("Unable to set a breakpoint on dynamic linker callback.");
3930 warning ("Suggest linking with /opt/langtools/lib/end.o.");
3931 warning ("GDB will be unable to track shl_load/shl_unload calls");
3934 if (sals
.nelts
!= 1)
3936 warning ("Unable to set unique breakpoint on dynamic linker callback.");
3937 warning ("GDB will be unable to track shl_load/shl_unload calls");
3941 /* Make sure that all storage allocated in decode_line_1 gets freed
3942 in case the following errors out. */
3943 old_chain
= make_cleanup (xfree
, sals
.sals
);
3944 if (canonical
!= (char **) NULL
)
3946 make_cleanup (xfree
, canonical
);
3947 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
3948 if (canonical
[0] != NULL
)
3949 make_cleanup (xfree
, canonical
[0]);
3952 resolve_sal_pc (&sals
.sals
[0]);
3954 /* Remove the canonical strings from the cleanup, they are needed below. */
3955 if (canonical
!= (char **) NULL
)
3956 discard_cleanups (canonical_strings_chain
);
3958 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
3959 set_breakpoint_count (breakpoint_count
+ 1);
3960 b
->number
= breakpoint_count
;
3962 b
->cond_string
= (cond_string
== NULL
) ?
3963 NULL
: savestring (cond_string
, strlen (cond_string
));
3966 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
3967 b
->addr_string
= canonical
[0];
3968 else if (addr_start
)
3969 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
3971 b
->enable_state
= bp_enabled
;
3972 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
3974 if (dll_pathname
== NULL
)
3975 b
->dll_pathname
= NULL
;
3978 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
3979 strcpy (b
->dll_pathname
, dll_pathname
);
3983 do_cleanups (old_chain
);
3987 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
3988 char *dll_pathname
, char *cond_string
)
3990 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
3991 cond_string
, bp_catch_load
);
3995 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
3996 char *dll_pathname
, char *cond_string
)
3998 solib_load_unload_1 (hookname
,tempflag
, dll_pathname
,
3999 cond_string
, bp_catch_unload
);
4003 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4004 enum bptype bp_kind
)
4006 struct symtab_and_line sal
;
4007 struct breakpoint
*b
;
4008 int thread
= -1; /* All threads. */
4015 b
= set_raw_breakpoint (sal
, bp_kind
);
4016 set_breakpoint_count (breakpoint_count
+ 1);
4017 b
->number
= breakpoint_count
;
4019 b
->cond_string
= (cond_string
== NULL
) ?
4020 NULL
: savestring (cond_string
, strlen (cond_string
));
4022 b
->addr_string
= NULL
;
4023 b
->enable_state
= bp_enabled
;
4024 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4025 b
->forked_inferior_pid
= 0;
4031 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4033 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4037 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4039 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4043 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4045 struct symtab_and_line sal
;
4046 struct breakpoint
*b
;
4047 int thread
= -1; /* All threads. */
4054 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4055 set_breakpoint_count (breakpoint_count
+ 1);
4056 b
->number
= breakpoint_count
;
4058 b
->cond_string
= (cond_string
== NULL
) ?
4059 NULL
: savestring (cond_string
, strlen (cond_string
));
4061 b
->addr_string
= NULL
;
4062 b
->enable_state
= bp_enabled
;
4063 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4069 hw_breakpoint_used_count (void)
4071 register struct breakpoint
*b
;
4076 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4084 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4086 register struct breakpoint
*b
;
4089 *other_type_used
= 0;
4092 if (b
->enable_state
== bp_enabled
)
4094 if (b
->type
== type
)
4096 else if ((b
->type
== bp_hardware_watchpoint
||
4097 b
->type
== bp_read_watchpoint
||
4098 b
->type
== bp_access_watchpoint
)
4099 && b
->enable_state
== bp_enabled
)
4100 *other_type_used
= 1;
4106 /* Call this after hitting the longjmp() breakpoint. Use this to set
4107 a new breakpoint at the target of the jmp_buf.
4109 FIXME - This ought to be done by setting a temporary breakpoint
4110 that gets deleted automatically... */
4113 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_info
*frame
)
4115 register struct breakpoint
*b
;
4118 if (b
->type
== bp_longjmp_resume
)
4121 b
->enable_state
= bp_enabled
;
4123 b
->frame
= frame
->frame
;
4126 check_duplicates (b
);
4132 disable_watchpoints_before_interactive_call_start (void)
4134 struct breakpoint
*b
;
4138 if (((b
->type
== bp_watchpoint
)
4139 || (b
->type
== bp_hardware_watchpoint
)
4140 || (b
->type
== bp_read_watchpoint
)
4141 || (b
->type
== bp_access_watchpoint
)
4142 || ep_is_exception_catchpoint (b
))
4143 && (b
->enable_state
== bp_enabled
))
4145 b
->enable_state
= bp_call_disabled
;
4146 check_duplicates (b
);
4152 enable_watchpoints_after_interactive_call_stop (void)
4154 struct breakpoint
*b
;
4158 if (((b
->type
== bp_watchpoint
)
4159 || (b
->type
== bp_hardware_watchpoint
)
4160 || (b
->type
== bp_read_watchpoint
)
4161 || (b
->type
== bp_access_watchpoint
)
4162 || ep_is_exception_catchpoint (b
))
4163 && (b
->enable_state
== bp_call_disabled
))
4165 b
->enable_state
= bp_enabled
;
4166 check_duplicates (b
);
4172 /* Set a breakpoint that will evaporate an end of command
4173 at address specified by SAL.
4174 Restrict it to frame FRAME if FRAME is nonzero. */
4177 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_info
*frame
,
4180 register struct breakpoint
*b
;
4181 b
= set_raw_breakpoint (sal
, type
);
4182 b
->enable_state
= bp_enabled
;
4183 b
->disposition
= disp_donttouch
;
4184 b
->frame
= (frame
? frame
->frame
: 0);
4186 /* If we're debugging a multi-threaded program, then we
4187 want momentary breakpoints to be active in only a
4188 single thread of control. */
4189 if (in_thread_list (inferior_ptid
))
4190 b
->thread
= pid_to_thread_id (inferior_ptid
);
4196 /* Tell the user we have just set a breakpoint B. */
4199 mention (struct breakpoint
*b
)
4202 struct cleanup
*old_chain
;
4203 struct ui_stream
*stb
;
4205 stb
= ui_out_stream_new (uiout
);
4206 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4208 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4209 watchpoint) other than breakpoint creation. It should be possible to
4210 clean this up and at the same time replace the random calls to
4211 breakpoint_changed with this hook, as has already been done for
4212 delete_breakpoint_hook and so on. */
4213 if (create_breakpoint_hook
)
4214 create_breakpoint_hook (b
);
4215 breakpoint_create_event (b
->number
);
4220 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4223 ui_out_text (uiout
, "Watchpoint ");
4224 ui_out_tuple_begin (uiout
, "wpt");
4225 ui_out_field_int (uiout
, "number", b
->number
);
4226 ui_out_text (uiout
, ": ");
4227 print_expression (b
->exp
, stb
->stream
);
4228 ui_out_field_stream (uiout
, "exp", stb
);
4229 ui_out_tuple_end (uiout
);
4231 case bp_hardware_watchpoint
:
4232 ui_out_text (uiout
, "Hardware watchpoint ");
4233 ui_out_tuple_begin (uiout
, "wpt");
4234 ui_out_field_int (uiout
, "number", b
->number
);
4235 ui_out_text (uiout
, ": ");
4236 print_expression (b
->exp
, stb
->stream
);
4237 ui_out_field_stream (uiout
, "exp", stb
);
4238 ui_out_tuple_end (uiout
);
4240 case bp_read_watchpoint
:
4241 ui_out_text (uiout
, "Hardware read watchpoint ");
4242 ui_out_tuple_begin (uiout
, "hw-rwpt");
4243 ui_out_field_int (uiout
, "number", b
->number
);
4244 ui_out_text (uiout
, ": ");
4245 print_expression (b
->exp
, stb
->stream
);
4246 ui_out_field_stream (uiout
, "exp", stb
);
4247 ui_out_tuple_end (uiout
);
4249 case bp_access_watchpoint
:
4250 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4251 ui_out_tuple_begin (uiout
, "hw-awpt");
4252 ui_out_field_int (uiout
, "number", b
->number
);
4253 ui_out_text (uiout
, ": ");
4254 print_expression (b
->exp
, stb
->stream
);
4255 ui_out_field_stream (uiout
, "exp", stb
);
4256 ui_out_tuple_end (uiout
);
4259 if (ui_out_is_mi_like_p (uiout
))
4264 printf_filtered ("Breakpoint %d", b
->number
);
4267 case bp_hardware_breakpoint
:
4268 if (ui_out_is_mi_like_p (uiout
))
4273 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4277 case bp_catch_unload
:
4278 printf_filtered ("Catchpoint %d (%s %s)",
4280 (b
->type
== bp_catch_load
) ? "load" : "unload",
4281 (b
->dll_pathname
!= NULL
) ?
4282 b
->dll_pathname
: "<any library>");
4285 case bp_catch_vfork
:
4286 printf_filtered ("Catchpoint %d (%s)",
4288 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4291 printf_filtered ("Catchpoint %d (exec)",
4294 case bp_catch_catch
:
4295 case bp_catch_throw
:
4296 printf_filtered ("Catchpoint %d (%s)",
4298 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4304 case bp_longjmp_resume
:
4305 case bp_step_resume
:
4306 case bp_through_sigtramp
:
4308 case bp_watchpoint_scope
:
4309 case bp_shlib_event
:
4310 case bp_thread_event
:
4315 if (addressprint
|| b
->source_file
== NULL
)
4317 printf_filtered (" at ");
4318 print_address_numeric (b
->address
, 1, gdb_stdout
);
4321 printf_filtered (": file %s, line %d.",
4322 b
->source_file
, b
->line_number
);
4324 do_cleanups (old_chain
);
4325 if (ui_out_is_mi_like_p (uiout
))
4327 printf_filtered ("\n");
4331 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4332 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4333 COND[i] and COND_STRING[i] values.
4335 NOTE: If the function succeeds, the caller is expected to cleanup
4336 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4337 array contents). If the function fails (error() is called), the
4338 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4339 COND and SALS arrays and each of those arrays contents. */
4342 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4343 struct expression
**cond
, char **cond_string
,
4344 enum bptype type
, enum bpdisp disposition
,
4345 int thread
, int ignore_count
, int from_tty
)
4347 if (type
== bp_hardware_breakpoint
)
4349 int i
= hw_breakpoint_used_count ();
4350 int target_resources_ok
=
4351 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4353 if (target_resources_ok
== 0)
4354 error ("No hardware breakpoint support in the target.");
4355 else if (target_resources_ok
< 0)
4356 error ("Hardware breakpoints used exceeds limit.");
4359 /* Now set all the breakpoints. */
4362 for (i
= 0; i
< sals
.nelts
; i
++)
4364 struct breakpoint
*b
;
4365 struct symtab_and_line sal
= sals
.sals
[i
];
4368 describe_other_breakpoints (sal
.pc
, sal
.section
);
4370 b
= set_raw_breakpoint (sal
, type
);
4371 set_breakpoint_count (breakpoint_count
+ 1);
4372 b
->number
= breakpoint_count
;
4375 b
->addr_string
= addr_string
[i
];
4376 b
->cond_string
= cond_string
[i
];
4377 b
->ignore_count
= ignore_count
;
4378 b
->enable_state
= bp_enabled
;
4379 b
->disposition
= disposition
;
4385 /* Parse ARG which is assumed to be a SAL specification possibly
4386 followed by conditionals. On return, SALS contains an array of SAL
4387 addresses found. ADDR_STRING contains a vector of (canonical)
4388 address strings. ARG points to the end of the SAL. */
4391 parse_breakpoint_sals (char **address
,
4392 struct symtabs_and_lines
*sals
,
4393 char ***addr_string
)
4395 char *addr_start
= *address
;
4396 *addr_string
= NULL
;
4397 /* If no arg given, or if first arg is 'if ', use the default
4399 if ((*address
) == NULL
4400 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4402 if (default_breakpoint_valid
)
4404 struct symtab_and_line sal
;
4405 INIT_SAL (&sal
); /* initialize to zeroes */
4406 sals
->sals
= (struct symtab_and_line
*)
4407 xmalloc (sizeof (struct symtab_and_line
));
4408 sal
.pc
= default_breakpoint_address
;
4409 sal
.line
= default_breakpoint_line
;
4410 sal
.symtab
= default_breakpoint_symtab
;
4411 sal
.section
= find_pc_overlay (sal
.pc
);
4412 sals
->sals
[0] = sal
;
4416 error ("No default breakpoint address now.");
4420 /* Force almost all breakpoints to be in terms of the
4421 current_source_symtab (which is decode_line_1's default). This
4422 should produce the results we want almost all of the time while
4423 leaving default_breakpoint_* alone. */
4424 if (default_breakpoint_valid
4425 && (!current_source_symtab
4426 || (strchr ("+-", (*address
)[0]) != NULL
)))
4427 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
4428 default_breakpoint_line
, addr_string
);
4430 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0, addr_string
);
4432 /* For any SAL that didn't have a canonical string, fill one in. */
4433 if (sals
->nelts
> 0 && *addr_string
== NULL
)
4434 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
4435 if (addr_start
!= (*address
))
4438 for (i
= 0; i
< sals
->nelts
; i
++)
4440 /* Add the string if not present. */
4441 if ((*addr_string
)[i
] == NULL
)
4442 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
4448 /* Convert each SAL into a real PC. Verify that the PC can be
4449 inserted as a breakpoint. If it can't throw an error. */
4452 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
4456 for (i
= 0; i
< sals
->nelts
; i
++)
4458 resolve_sal_pc (&sals
->sals
[i
]);
4460 /* It's possible for the PC to be nonzero, but still an illegal
4461 value on some targets.
4463 For example, on HP-UX if you start gdb, and before running the
4464 inferior you try to set a breakpoint on a shared library function
4465 "foo" where the inferior doesn't call "foo" directly but does
4466 pass its address to another function call, then we do find a
4467 minimal symbol for the "foo", but it's address is invalid.
4468 (Appears to be an index into a table that the loader sets up
4469 when the inferior is run.)
4471 Give the target a chance to bless sals.sals[i].pc before we
4472 try to make a breakpoint for it. */
4473 if (PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
4475 if (address
== NULL
)
4476 error ("Cannot break without a running program.");
4478 error ("Cannot break on %s without a running program.",
4484 /* Set a breakpoint according to ARG (function, linenum or *address)
4485 flag: first bit : 0 non-temporary, 1 temporary.
4486 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4489 break_command_1 (char *arg
, int flag
, int from_tty
)
4491 int tempflag
, hardwareflag
;
4492 struct symtabs_and_lines sals
;
4493 register struct expression
**cond
= 0;
4494 /* Pointers in arg to the start, and one past the end, of the
4496 char **cond_string
= (char **) NULL
;
4497 char *addr_start
= arg
;
4499 struct cleanup
*old_chain
;
4500 struct cleanup
*breakpoint_chain
= NULL
;
4503 int ignore_count
= 0;
4505 hardwareflag
= flag
& BP_HARDWAREFLAG
;
4506 tempflag
= flag
& BP_TEMPFLAG
;
4511 parse_breakpoint_sals (&arg
, &sals
, &addr_string
);
4516 /* Create a chain of things that always need to be cleaned up. */
4517 old_chain
= make_cleanup (null_cleanup
, 0);
4519 /* Make sure that all storage allocated to SALS gets freed. */
4520 make_cleanup (xfree
, sals
.sals
);
4522 /* Cleanup the addr_string array but not its contents. */
4523 make_cleanup (xfree
, addr_string
);
4525 /* Allocate space for all the cond expressions. */
4526 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4527 make_cleanup (xfree
, cond
);
4529 /* Allocate space for all the cond strings. */
4530 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4531 make_cleanup (xfree
, cond_string
);
4533 /* ----------------------------- SNIP -----------------------------
4534 Anything added to the cleanup chain beyond this point is assumed
4535 to be part of a breakpoint. If the breakpoint create succeeds
4536 then the memory is not reclaimed. */
4537 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4539 /* Mark the contents of the addr_string for cleanup. These go on
4540 the breakpoint_chain and only occure if the breakpoint create
4542 for (i
= 0; i
< sals
.nelts
; i
++)
4544 if (addr_string
[i
] != NULL
)
4545 make_cleanup (xfree
, addr_string
[i
]);
4548 /* Resolve all line numbers to PC's and verify that the addresses
4549 are ok for the target. */
4550 breakpoint_sals_to_pc (&sals
, addr_start
);
4552 /* Verify that condition can be parsed, before setting any
4553 breakpoints. Allocate a separate condition expression for each
4555 thread
= -1; /* No specific thread yet */
4556 for (i
= 0; i
< sals
.nelts
; i
++)
4563 char *cond_start
= NULL
;
4564 char *cond_end
= NULL
;
4565 while (*tok
== ' ' || *tok
== '\t')
4570 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
4573 toklen
= end_tok
- tok
;
4575 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
4577 tok
= cond_start
= end_tok
+ 1;
4578 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4579 make_cleanup (xfree
, cond
[i
]);
4581 cond_string
[i
] = savestring (cond_start
, cond_end
- cond_start
);
4582 make_cleanup (xfree
, cond_string
[i
]);
4584 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
4590 thread
= strtol (tok
, &tok
, 0);
4592 error ("Junk after thread keyword.");
4593 if (!valid_thread_id (thread
))
4594 error ("Unknown thread %d\n", thread
);
4597 error ("Junk at end of arguments.");
4601 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
4602 hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
4603 tempflag
? disp_del
: disp_donttouch
,
4604 thread
, ignore_count
, from_tty
);
4608 warning ("Multiple breakpoints were set.");
4609 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
4611 /* That's it. Discard the cleanups for data inserted into the
4613 discard_cleanups (breakpoint_chain
);
4614 /* But cleanup everything else. */
4615 do_cleanups (old_chain
);
4618 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
4619 linenum or *address) with COND and IGNORE_COUNT. */
4621 struct captured_breakpoint_args
4632 do_captured_breakpoint (void *data
)
4634 struct captured_breakpoint_args
*args
= data
;
4635 struct symtabs_and_lines sals
;
4636 register struct expression
**cond
;
4637 struct cleanup
*old_chain
;
4638 struct cleanup
*breakpoint_chain
= NULL
;
4645 /* Parse the source and lines spec. Delay check that the expression
4646 didn't contain trailing garbage until after cleanups are in
4650 address_end
= args
->address
;
4652 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
);
4657 /* Create a chain of things at always need to be cleaned up. */
4658 old_chain
= make_cleanup (null_cleanup
, 0);
4660 /* Always have a addr_string array, even if it is empty. */
4661 make_cleanup (xfree
, addr_string
);
4663 /* Make sure that all storage allocated to SALS gets freed. */
4664 make_cleanup (xfree
, sals
.sals
);
4666 /* Allocate space for all the cond expressions. */
4667 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4668 make_cleanup (xfree
, cond
);
4670 /* Allocate space for all the cond strings. */
4671 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4672 make_cleanup (xfree
, cond_string
);
4674 /* ----------------------------- SNIP -----------------------------
4675 Anything added to the cleanup chain beyond this point is assumed
4676 to be part of a breakpoint. If the breakpoint create goes
4677 through then that memory is not cleaned up. */
4678 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4680 /* Mark the contents of the addr_string for cleanup. These go on
4681 the breakpoint_chain and only occure if the breakpoint create
4683 for (i
= 0; i
< sals
.nelts
; i
++)
4685 if (addr_string
[i
] != NULL
)
4686 make_cleanup (xfree
, addr_string
[i
]);
4689 /* Wait until now before checking for garbage at the end of the
4690 address. That way cleanups can take care of freeing any
4692 if (*address_end
!= '\0')
4693 error ("Garbage %s following breakpoint address", address_end
);
4695 /* Resolve all line numbers to PC's. */
4696 breakpoint_sals_to_pc (&sals
, args
->address
);
4698 /* Verify that conditions can be parsed, before setting any
4700 for (i
= 0; i
< sals
.nelts
; i
++)
4702 if (args
->condition
!= NULL
)
4704 char *tok
= args
->condition
;
4705 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4707 error ("Garbage %s follows condition", tok
);
4708 make_cleanup (xfree
, cond
[i
]);
4709 cond_string
[i
] = xstrdup (args
->condition
);
4713 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
4714 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
4715 args
->tempflag
? disp_del
: disp_donttouch
,
4716 args
->thread
, args
->ignore_count
, 0/*from-tty*/);
4718 /* That's it. Discard the cleanups for data inserted into the
4720 discard_cleanups (breakpoint_chain
);
4721 /* But cleanup everything else. */
4722 do_cleanups (old_chain
);
4727 gdb_breakpoint (char *address
, char *condition
,
4728 int hardwareflag
, int tempflag
,
4729 int thread
, int ignore_count
)
4731 struct captured_breakpoint_args args
;
4732 args
.address
= address
;
4733 args
.condition
= condition
;
4734 args
.hardwareflag
= hardwareflag
;
4735 args
.tempflag
= tempflag
;
4736 args
.thread
= thread
;
4737 args
.ignore_count
= ignore_count
;
4738 return catch_errors (do_captured_breakpoint
, &args
,
4739 NULL
, RETURN_MASK_ALL
);
4744 break_at_finish_at_depth_command_1 (char *arg
, int flag
, int from_tty
)
4746 struct frame_info
*frame
;
4747 CORE_ADDR low
, high
, selected_pc
= 0;
4748 char *extra_args
= NULL
;
4751 int extra_args_len
= 0, if_arg
= 0;
4754 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
4757 if (default_breakpoint_valid
)
4761 selected_pc
= selected_frame
->pc
;
4766 error ("No selected frame.");
4769 error ("No default breakpoint address now.");
4773 extra_args
= strchr (arg
, ' ');
4777 extra_args_len
= strlen (extra_args
);
4778 level_arg
= (char *) xmalloc (extra_args
- arg
);
4779 strncpy (level_arg
, arg
, extra_args
- arg
- 1);
4780 level_arg
[extra_args
- arg
- 1] = '\0';
4784 level_arg
= (char *) xmalloc (strlen (arg
) + 1);
4785 strcpy (level_arg
, arg
);
4788 frame
= parse_frame_specification (level_arg
);
4790 selected_pc
= frame
->pc
;
4797 extra_args_len
= strlen (arg
);
4802 if (find_pc_partial_function (selected_pc
, (char **) NULL
, &low
, &high
))
4804 addr_string
= (char *) xmalloc (26 + extra_args_len
);
4806 sprintf (addr_string
, "*0x%s %s", paddr_nz (high
), extra_args
);
4808 sprintf (addr_string
, "*0x%s", paddr_nz (high
));
4809 break_command_1 (addr_string
, flag
, from_tty
);
4810 xfree (addr_string
);
4813 error ("No function contains the specified address");
4816 error ("Unable to set breakpoint at procedure exit");
4821 break_at_finish_command_1 (char *arg
, int flag
, int from_tty
)
4823 char *addr_string
, *break_string
, *beg_addr_string
;
4824 CORE_ADDR low
, high
;
4825 struct symtabs_and_lines sals
;
4826 struct symtab_and_line sal
;
4827 struct cleanup
*old_chain
;
4828 char *extra_args
= NULL
;
4829 int extra_args_len
= 0;
4833 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
4835 if (default_breakpoint_valid
)
4839 addr_string
= (char *) xmalloc (15);
4840 sprintf (addr_string
, "*0x%s", paddr_nz (selected_frame
->pc
));
4845 error ("No selected frame.");
4848 error ("No default breakpoint address now.");
4852 addr_string
= (char *) xmalloc (strlen (arg
) + 1);
4853 strcpy (addr_string
, arg
);
4859 extra_args_len
= strlen (arg
);
4863 /* get the stuff after the function name or address */
4864 extra_args
= strchr (arg
, ' ');
4868 extra_args_len
= strlen (extra_args
);
4875 beg_addr_string
= addr_string
;
4876 sals
= decode_line_1 (&addr_string
, 1, (struct symtab
*) NULL
, 0,
4879 xfree (beg_addr_string
);
4880 old_chain
= make_cleanup (xfree
, sals
.sals
);
4881 for (i
= 0; (i
< sals
.nelts
); i
++)
4884 if (find_pc_partial_function (sal
.pc
, (char **) NULL
, &low
, &high
))
4886 break_string
= (char *) xmalloc (extra_args_len
+ 26);
4888 sprintf (break_string
, "*0x%s %s", paddr_nz (high
), extra_args
);
4890 sprintf (break_string
, "*0x%s", paddr_nz (high
));
4891 break_command_1 (break_string
, flag
, from_tty
);
4892 xfree (break_string
);
4895 error ("No function contains the specified address");
4899 warning ("Multiple breakpoints were set.\n");
4900 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
4902 do_cleanups (old_chain
);
4906 /* Helper function for break_command_1 and disassemble_command. */
4909 resolve_sal_pc (struct symtab_and_line
*sal
)
4913 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
4915 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
4916 error ("No line %d in file \"%s\".",
4917 sal
->line
, sal
->symtab
->filename
);
4921 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
4923 struct blockvector
*bv
;
4928 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
4931 b
= BLOCKVECTOR_BLOCK (bv
, index
);
4932 sym
= block_function (b
);
4935 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
4936 sal
->section
= SYMBOL_BFD_SECTION (sym
);
4940 /* It really is worthwhile to have the section, so we'll just
4941 have to look harder. This case can be executed if we have
4942 line numbers but no functions (as can happen in assembly
4945 struct minimal_symbol
*msym
;
4947 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
4949 sal
->section
= SYMBOL_BFD_SECTION (msym
);
4956 break_command (char *arg
, int from_tty
)
4958 break_command_1 (arg
, 0, from_tty
);
4962 break_at_finish_command (char *arg
, int from_tty
)
4964 break_at_finish_command_1 (arg
, 0, from_tty
);
4968 break_at_finish_at_depth_command (char *arg
, int from_tty
)
4970 break_at_finish_at_depth_command_1 (arg
, 0, from_tty
);
4974 tbreak_command (char *arg
, int from_tty
)
4976 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
4980 tbreak_at_finish_command (char *arg
, int from_tty
)
4982 break_at_finish_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
4986 hbreak_command (char *arg
, int from_tty
)
4988 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
4992 thbreak_command (char *arg
, int from_tty
)
4994 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
4998 stop_command (char *arg
, int from_tty
)
5000 printf_filtered ("Specify the type of breakpoint to set.\n\
5001 Usage: stop in <function | address>\n\
5006 stopin_command (char *arg
, int from_tty
)
5010 if (arg
== (char *) NULL
)
5012 else if (*arg
!= '*')
5017 /* look for a ':'. If this is a line number specification, then
5018 say it is bad, otherwise, it should be an address or
5019 function/method name */
5020 while (*argptr
&& !hasColon
)
5022 hasColon
= (*argptr
== ':');
5027 badInput
= (*argptr
!= ':'); /* Not a class::method */
5029 badInput
= isdigit (*arg
); /* a simple line number */
5033 printf_filtered ("Usage: stop in <function | address>\n");
5035 break_command_1 (arg
, 0, from_tty
);
5039 stopat_command (char *arg
, int from_tty
)
5043 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5050 /* look for a ':'. If there is a '::' then get out, otherwise
5051 it is probably a line number. */
5052 while (*argptr
&& !hasColon
)
5054 hasColon
= (*argptr
== ':');
5059 badInput
= (*argptr
== ':'); /* we have class::method */
5061 badInput
= !isdigit (*arg
); /* not a line number */
5065 printf_filtered ("Usage: stop at <line>\n");
5067 break_command_1 (arg
, 0, from_tty
);
5071 /* accessflag: hw_write: watch write,
5072 hw_read: watch read,
5073 hw_access: watch access (read or write) */
5075 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5077 struct breakpoint
*b
;
5078 struct symtab_and_line sal
;
5079 struct expression
*exp
;
5080 struct block
*exp_valid_block
;
5081 struct value
*val
, *mark
;
5082 struct frame_info
*frame
;
5083 struct frame_info
*prev_frame
= NULL
;
5084 char *exp_start
= NULL
;
5085 char *exp_end
= NULL
;
5086 char *tok
, *end_tok
;
5088 char *cond_start
= NULL
;
5089 char *cond_end
= NULL
;
5090 struct expression
*cond
= NULL
;
5091 int i
, other_type_used
, target_resources_ok
= 0;
5092 enum bptype bp_type
;
5095 INIT_SAL (&sal
); /* initialize to zeroes */
5097 /* Parse arguments. */
5098 innermost_block
= NULL
;
5100 exp
= parse_exp_1 (&arg
, 0, 0);
5102 exp_valid_block
= innermost_block
;
5103 mark
= value_mark ();
5104 val
= evaluate_expression (exp
);
5105 release_value (val
);
5106 if (VALUE_LAZY (val
))
5107 value_fetch_lazy (val
);
5110 while (*tok
== ' ' || *tok
== '\t')
5114 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5117 toklen
= end_tok
- tok
;
5118 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5120 tok
= cond_start
= end_tok
+ 1;
5121 cond
= parse_exp_1 (&tok
, 0, 0);
5125 error ("Junk at end of command.");
5127 if (accessflag
== hw_read
)
5128 bp_type
= bp_read_watchpoint
;
5129 else if (accessflag
== hw_access
)
5130 bp_type
= bp_access_watchpoint
;
5132 bp_type
= bp_hardware_watchpoint
;
5134 mem_cnt
= can_use_hardware_watchpoint (val
);
5135 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5136 error ("Expression cannot be implemented with read/access watchpoint.");
5139 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5140 target_resources_ok
=
5141 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5143 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5144 error ("Target does not support this type of hardware watchpoint.");
5146 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5147 error ("Target can only support one kind of HW watchpoint at a time.");
5150 #if defined(HPUXHPPA)
5151 /* On HP-UX if you set a h/w
5152 watchpoint before the "run" command, the inferior dies with a e.g.,
5153 SIGILL once you start it. I initially believed this was due to a
5154 bad interaction between page protection traps and the initial
5155 startup sequence by the dynamic linker.
5157 However, I tried avoiding that by having HP-UX's implementation of
5158 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5159 yet, which forced slow watches before a "run" or "attach", and it
5160 still fails somewhere in the startup code.
5162 Until I figure out what's happening, I'm disallowing watches altogether
5163 before the "run" or "attach" command. We'll tell the user they must
5164 set watches after getting the program started. */
5165 if (!target_has_execution
)
5167 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5170 #endif /* HPUXHPPA */
5172 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5173 watchpoint could not be set. */
5174 if (!mem_cnt
|| target_resources_ok
<= 0)
5175 bp_type
= bp_watchpoint
;
5177 /* Now set up the breakpoint. */
5178 b
= set_raw_breakpoint (sal
, bp_type
);
5179 set_breakpoint_count (breakpoint_count
+ 1);
5180 b
->number
= breakpoint_count
;
5181 b
->disposition
= disp_donttouch
;
5183 b
->exp_valid_block
= exp_valid_block
;
5184 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5188 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5192 frame
= block_innermost_frame (exp_valid_block
);
5195 prev_frame
= get_prev_frame (frame
);
5196 b
->watchpoint_frame
= frame
->frame
;
5199 b
->watchpoint_frame
= (CORE_ADDR
) 0;
5201 /* If the expression is "local", then set up a "watchpoint scope"
5202 breakpoint at the point where we've left the scope of the watchpoint
5204 if (innermost_block
)
5208 struct breakpoint
*scope_breakpoint
;
5209 struct symtab_and_line scope_sal
;
5211 INIT_SAL (&scope_sal
); /* initialize to zeroes */
5212 scope_sal
.pc
= get_frame_pc (prev_frame
);
5213 scope_sal
.section
= find_pc_overlay (scope_sal
.pc
);
5215 scope_breakpoint
= set_raw_breakpoint (scope_sal
,
5216 bp_watchpoint_scope
);
5217 set_breakpoint_count (breakpoint_count
+ 1);
5218 scope_breakpoint
->number
= breakpoint_count
;
5220 scope_breakpoint
->enable_state
= bp_enabled
;
5222 /* Automatically delete the breakpoint when it hits. */
5223 scope_breakpoint
->disposition
= disp_del
;
5225 /* Only break in the proper frame (help with recursion). */
5226 scope_breakpoint
->frame
= prev_frame
->frame
;
5228 /* Set the address at which we will stop. */
5229 scope_breakpoint
->address
= get_frame_pc (prev_frame
);
5231 /* The scope breakpoint is related to the watchpoint. We
5232 will need to act on them together. */
5233 b
->related_breakpoint
= scope_breakpoint
;
5236 value_free_to_mark (mark
);
5240 /* Return count of locations need to be watched and can be handled
5241 in hardware. If the watchpoint can not be handled
5242 in hardware return zero. */
5244 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5245 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5246 ((BYTE_SIZE) <= (REGISTER_SIZE))
5249 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5250 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5251 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5255 can_use_hardware_watchpoint (struct value
*v
)
5257 int found_memory_cnt
= 0;
5258 struct value
*head
= v
;
5260 /* Did the user specifically forbid us to use hardware watchpoints? */
5261 if (!can_use_hw_watchpoints
)
5264 /* Make sure that the value of the expression depends only upon
5265 memory contents, and values computed from them within GDB. If we
5266 find any register references or function calls, we can't use a
5267 hardware watchpoint.
5269 The idea here is that evaluating an expression generates a series
5270 of values, one holding the value of every subexpression. (The
5271 expression a*b+c has five subexpressions: a, b, a*b, c, and
5272 a*b+c.) GDB's values hold almost enough information to establish
5273 the criteria given above --- they identify memory lvalues,
5274 register lvalues, computed values, etcetera. So we can evaluate
5275 the expression, and then scan the chain of values that leaves
5276 behind to decide whether we can detect any possible change to the
5277 expression's final value using only hardware watchpoints.
5279 However, I don't think that the values returned by inferior
5280 function calls are special in any way. So this function may not
5281 notice that an expression involving an inferior function call
5282 can't be watched with hardware watchpoints. FIXME. */
5283 for (; v
; v
= v
->next
)
5285 if (VALUE_LVAL (v
) == lval_memory
)
5288 /* A lazy memory lvalue is one that GDB never needed to fetch;
5289 we either just used its address (e.g., `a' in `a.b') or
5290 we never needed it at all (e.g., `a' in `a,b'). */
5294 /* Ahh, memory we actually used! Check if we can cover
5295 it with hardware watchpoints. */
5296 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
5298 /* We only watch structs and arrays if user asked for it
5299 explicitly, never if they just happen to appear in a
5300 middle of some value chain. */
5302 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5303 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5305 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
5306 int len
= TYPE_LENGTH (VALUE_TYPE (v
));
5308 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5315 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
5316 return 0; /* ??? What does this represent? */
5317 else if (v
->lval
== lval_register
)
5318 return 0; /* cannot watch a register with a HW watchpoint */
5321 /* The expression itself looks suitable for using a hardware
5322 watchpoint, but give the target machine a chance to reject it. */
5323 return found_memory_cnt
;
5327 watch_command_wrapper (char *arg
, int from_tty
)
5329 watch_command (arg
, from_tty
);
5333 watch_command (char *arg
, int from_tty
)
5335 watch_command_1 (arg
, hw_write
, from_tty
);
5339 rwatch_command_wrapper (char *arg
, int from_tty
)
5341 rwatch_command (arg
, from_tty
);
5345 rwatch_command (char *arg
, int from_tty
)
5347 watch_command_1 (arg
, hw_read
, from_tty
);
5351 awatch_command_wrapper (char *arg
, int from_tty
)
5353 awatch_command (arg
, from_tty
);
5357 awatch_command (char *arg
, int from_tty
)
5359 watch_command_1 (arg
, hw_access
, from_tty
);
5363 /* Helper routines for the until_command routine in infcmd.c. Here
5364 because it uses the mechanisms of breakpoints. */
5366 /* This function is called by fetch_inferior_event via the
5367 cmd_continuation pointer, to complete the until command. It takes
5368 care of cleaning up the temporary breakpoints set up by the until
5371 until_break_command_continuation (struct continuation_arg
*arg
)
5373 struct cleanup
*cleanups
;
5375 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5376 do_exec_cleanups (cleanups
);
5381 until_break_command (char *arg
, int from_tty
)
5383 struct symtabs_and_lines sals
;
5384 struct symtab_and_line sal
;
5385 struct frame_info
*prev_frame
= get_prev_frame (selected_frame
);
5386 struct breakpoint
*breakpoint
;
5387 struct cleanup
*old_chain
;
5388 struct continuation_arg
*arg1
;
5391 clear_proceed_status ();
5393 /* Set a breakpoint where the user wants it and at return from
5396 if (default_breakpoint_valid
)
5397 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5398 default_breakpoint_line
, (char ***) NULL
);
5400 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5401 0, (char ***) NULL
);
5403 if (sals
.nelts
!= 1)
5404 error ("Couldn't get information on specified line.");
5407 xfree (sals
.sals
); /* malloc'd, so freed */
5410 error ("Junk at end of arguments.");
5412 resolve_sal_pc (&sal
);
5414 breakpoint
= set_momentary_breakpoint (sal
, selected_frame
, bp_until
);
5416 if (!event_loop_p
|| !target_can_async_p ())
5417 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5419 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5421 /* If we are running asynchronously, and the target supports async
5422 execution, we are not waiting for the target to stop, in the call
5423 tp proceed, below. This means that we cannot delete the
5424 brekpoints until the target has actually stopped. The only place
5425 where we get a chance to do that is in fetch_inferior_event, so
5426 we must set things up for that. */
5428 if (event_loop_p
&& target_can_async_p ())
5430 /* In this case the arg for the continuation is just the point
5431 in the exec_cleanups chain from where to start doing
5432 cleanups, because all the continuation does is the cleanups in
5433 the exec_cleanup_chain. */
5435 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5437 arg1
->data
.pointer
= old_chain
;
5439 add_continuation (until_break_command_continuation
, arg1
);
5442 /* Keep within the current frame */
5446 sal
= find_pc_line (prev_frame
->pc
, 0);
5447 sal
.pc
= prev_frame
->pc
;
5448 breakpoint
= set_momentary_breakpoint (sal
, prev_frame
, bp_until
);
5449 if (!event_loop_p
|| !target_can_async_p ())
5450 make_cleanup_delete_breakpoint (breakpoint
);
5452 make_exec_cleanup_delete_breakpoint (breakpoint
);
5455 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
5456 /* Do the cleanups now, anly if we are not running asynchronously,
5457 of if we are, but the target is still synchronous. */
5458 if (!event_loop_p
|| !target_can_async_p ())
5459 do_cleanups (old_chain
);
5463 /* These aren't used; I don't konw what they were for. */
5464 /* Set a breakpoint at the catch clause for NAME. */
5466 catch_breakpoint (char *name
)
5471 disable_catch_breakpoint (void)
5476 delete_catch_breakpoint (void)
5481 enable_catch_breakpoint (void)
5488 struct sal_chain
*next
;
5489 struct symtab_and_line sal
;
5493 /* Not really used -- invocation in handle_gnu_4_16_catch_command
5494 had been commented out in the v.4.16 sources, and stays
5495 disabled there now because "catch NAME" syntax isn't allowed.
5497 /* This isn't used; I don't know what it was for. */
5498 /* For each catch clause identified in ARGS, run FUNCTION
5499 with that clause as an argument. */
5500 static struct symtabs_and_lines
5501 map_catch_names (char *args
, int (*function
) ())
5503 register char *p
= args
;
5505 struct symtabs_and_lines sals
;
5507 struct sal_chain
*sal_chain
= 0;
5511 error_no_arg ("one or more catch names");
5519 /* Don't swallow conditional part. */
5520 if (p1
[0] == 'i' && p1
[1] == 'f'
5521 && (p1
[2] == ' ' || p1
[2] == '\t'))
5527 while (isalnum (*p1
) || *p1
== '_' || *p1
== '$')
5531 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
5532 error ("Arguments must be catch names.");
5538 struct sal_chain
*next
= (struct sal_chain
*)
5539 alloca (sizeof (struct sal_chain
));
5540 next
->next
= sal_chain
;
5541 next
->sal
= get_catch_sal (p
);
5546 printf_unfiltered ("No catch clause for exception %s.\n", p
);
5551 while (*p
== ' ' || *p
== '\t')
5557 /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
5559 static struct symtabs_and_lines
5560 get_catch_sals (int this_level_only
)
5562 register struct blockvector
*bl
;
5563 register struct block
*block
;
5564 int index
, have_default
= 0;
5566 struct symtabs_and_lines sals
;
5567 struct sal_chain
*sal_chain
= 0;
5568 char *blocks_searched
;
5570 /* Not sure whether an error message is always the correct response,
5571 but it's better than a core dump. */
5572 if (selected_frame
== NULL
)
5573 error ("No selected frame.");
5574 block
= get_frame_block (selected_frame
);
5575 pc
= selected_frame
->pc
;
5581 error ("No symbol table info available.\n");
5583 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
5584 blocks_searched
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
5585 memset (blocks_searched
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
5589 CORE_ADDR end
= BLOCK_END (block
) - 4;
5592 if (bl
!= blockvector_for_pc (end
, &index
))
5593 error ("blockvector blotch");
5594 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
5595 error ("blockvector botch");
5596 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
5599 /* Don't print out blocks that have gone by. */
5600 while (index
< last_index
5601 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
5604 while (index
< last_index
5605 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
5607 if (blocks_searched
[index
] == 0)
5609 struct block
*b
= BLOCKVECTOR_BLOCK (bl
, index
);
5611 register struct symbol
*sym
;
5613 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
5615 if (STREQ (SYMBOL_NAME (sym
), "default"))
5621 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
5623 struct sal_chain
*next
= (struct sal_chain
*)
5624 alloca (sizeof (struct sal_chain
));
5625 next
->next
= sal_chain
;
5626 next
->sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
),
5631 blocks_searched
[index
] = 1;
5637 if (sal_chain
&& this_level_only
)
5640 /* After handling the function's top-level block, stop.
5641 Don't continue to its superblock, the block of
5642 per-file symbols. */
5643 if (BLOCK_FUNCTION (block
))
5645 block
= BLOCK_SUPERBLOCK (block
);
5650 struct sal_chain
*tmp_chain
;
5652 /* Count the number of entries. */
5653 for (index
= 0, tmp_chain
= sal_chain
; tmp_chain
;
5654 tmp_chain
= tmp_chain
->next
)
5658 sals
.sals
= (struct symtab_and_line
*)
5659 xmalloc (index
* sizeof (struct symtab_and_line
));
5660 for (index
= 0; sal_chain
; sal_chain
= sal_chain
->next
, index
++)
5661 sals
.sals
[index
] = sal_chain
->sal
;
5668 ep_skip_leading_whitespace (char **s
)
5670 if ((s
== NULL
) || (*s
== NULL
))
5672 while (isspace (**s
))
5676 /* This function examines a string, and attempts to find a token
5677 that might be an event name in the leading characters. If a
5678 possible match is found, a pointer to the last character of
5679 the token is returned. Else, NULL is returned. */
5682 ep_find_event_name_end (char *arg
)
5685 char *event_name_end
= NULL
;
5687 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5691 /* We break out of the loop when we find a token delimiter.
5692 Basically, we're looking for alphanumerics and underscores;
5693 anything else delimites the token. */
5696 if (!isalnum (*s
) && (*s
!= '_'))
5702 return event_name_end
;
5706 /* This function attempts to parse an optional "if <cond>" clause
5707 from the arg string. If one is not found, it returns NULL.
5709 Else, it returns a pointer to the condition string. (It does not
5710 attempt to evaluate the string against a particular block.) And,
5711 it updates arg to point to the first character following the parsed
5712 if clause in the arg string. */
5715 ep_parse_optional_if_clause (char **arg
)
5719 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
5722 /* Skip the "if" keyword. */
5725 /* Skip any extra leading whitespace, and record the start of the
5726 condition string. */
5727 ep_skip_leading_whitespace (arg
);
5730 /* Assume that the condition occupies the remainder of the arg string. */
5731 (*arg
) += strlen (cond_string
);
5736 /* This function attempts to parse an optional filename from the arg
5737 string. If one is not found, it returns NULL.
5739 Else, it returns a pointer to the parsed filename. (This function
5740 makes no attempt to verify that a file of that name exists, or is
5741 accessible.) And, it updates arg to point to the first character
5742 following the parsed filename in the arg string.
5744 Note that clients needing to preserve the returned filename for
5745 future access should copy it to their own buffers. */
5747 ep_parse_optional_filename (char **arg
)
5749 static char filename
[1024];
5754 if ((*arg_p
== '\0') || isspace (*arg_p
))
5772 /* Commands to deal with catching events, such as signals, exceptions,
5773 process start/exit, etc. */
5777 catch_fork
, catch_vfork
5781 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
5782 static void catch_fork_command_1 (catch_fork_kind fork_kind
,
5783 char *arg
, int tempflag
, int from_tty
);
5786 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
5789 char *cond_string
= NULL
;
5791 ep_skip_leading_whitespace (&arg
);
5793 /* The allowed syntax is:
5795 catch [v]fork if <cond>
5797 First, check if there's an if clause. */
5798 cond_string
= ep_parse_optional_if_clause (&arg
);
5800 if ((*arg
!= '\0') && !isspace (*arg
))
5801 error ("Junk at end of arguments.");
5803 /* If this target supports it, create a fork or vfork catchpoint
5804 and enable reporting of such events. */
5808 create_fork_event_catchpoint (tempflag
, cond_string
);
5811 create_vfork_event_catchpoint (tempflag
, cond_string
);
5814 error ("unsupported or unknown fork kind; cannot catch it");
5820 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
5822 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
5824 char *cond_string
= NULL
;
5826 ep_skip_leading_whitespace (&arg
);
5828 /* The allowed syntax is:
5830 catch exec if <cond>
5832 First, check if there's an if clause. */
5833 cond_string
= ep_parse_optional_if_clause (&arg
);
5835 if ((*arg
!= '\0') && !isspace (*arg
))
5836 error ("Junk at end of arguments.");
5838 /* If this target supports it, create an exec catchpoint
5839 and enable reporting of such events. */
5840 create_exec_event_catchpoint (tempflag
, cond_string
);
5844 #if defined(SOLIB_ADD)
5846 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
5848 char *dll_pathname
= NULL
;
5849 char *cond_string
= NULL
;
5851 ep_skip_leading_whitespace (&arg
);
5853 /* The allowed syntax is:
5855 catch load if <cond>
5856 catch load <filename>
5857 catch load <filename> if <cond>
5859 The user is not allowed to specify the <filename> after an
5862 We'll ignore the pathological case of a file named "if".
5864 First, check if there's an if clause. If so, then there
5865 cannot be a filename. */
5866 cond_string
= ep_parse_optional_if_clause (&arg
);
5868 /* If there was an if clause, then there cannot be a filename.
5869 Else, there might be a filename and an if clause. */
5870 if (cond_string
== NULL
)
5872 dll_pathname
= ep_parse_optional_filename (&arg
);
5873 ep_skip_leading_whitespace (&arg
);
5874 cond_string
= ep_parse_optional_if_clause (&arg
);
5877 if ((*arg
!= '\0') && !isspace (*arg
))
5878 error ("Junk at end of arguments.");
5880 /* Create a load breakpoint that only triggers when a load of
5881 the specified dll (or any dll, if no pathname was specified)
5883 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
5884 dll_pathname
, cond_string
);
5888 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
5890 char *dll_pathname
= NULL
;
5891 char *cond_string
= NULL
;
5893 ep_skip_leading_whitespace (&arg
);
5895 /* The allowed syntax is:
5897 catch unload if <cond>
5898 catch unload <filename>
5899 catch unload <filename> if <cond>
5901 The user is not allowed to specify the <filename> after an
5904 We'll ignore the pathological case of a file named "if".
5906 First, check if there's an if clause. If so, then there
5907 cannot be a filename. */
5908 cond_string
= ep_parse_optional_if_clause (&arg
);
5910 /* If there was an if clause, then there cannot be a filename.
5911 Else, there might be a filename and an if clause. */
5912 if (cond_string
== NULL
)
5914 dll_pathname
= ep_parse_optional_filename (&arg
);
5915 ep_skip_leading_whitespace (&arg
);
5916 cond_string
= ep_parse_optional_if_clause (&arg
);
5919 if ((*arg
!= '\0') && !isspace (*arg
))
5920 error ("Junk at end of arguments.");
5922 /* Create an unload breakpoint that only triggers when an unload of
5923 the specified dll (or any dll, if no pathname was specified)
5925 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
5926 dll_pathname
, cond_string
);
5928 #endif /* SOLIB_ADD */
5930 /* Commands to deal with catching exceptions. */
5932 /* Set a breakpoint at the specified callback routine for an
5933 exception event callback */
5936 create_exception_catchpoint (int tempflag
, char *cond_string
,
5937 enum exception_event_kind ex_event
,
5938 struct symtab_and_line
*sal
)
5940 struct breakpoint
*b
;
5941 int thread
= -1; /* All threads. */
5944 if (!sal
) /* no exception support? */
5949 case EX_EVENT_THROW
:
5950 bptype
= bp_catch_throw
;
5952 case EX_EVENT_CATCH
:
5953 bptype
= bp_catch_catch
;
5955 default: /* error condition */
5956 error ("Internal error -- invalid catchpoint kind");
5959 b
= set_raw_breakpoint (*sal
, bptype
);
5960 set_breakpoint_count (breakpoint_count
+ 1);
5961 b
->number
= breakpoint_count
;
5963 b
->cond_string
= (cond_string
== NULL
) ?
5964 NULL
: savestring (cond_string
, strlen (cond_string
));
5966 b
->addr_string
= NULL
;
5967 b
->enable_state
= bp_enabled
;
5968 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5972 /* Deal with "catch catch" and "catch throw" commands */
5975 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
5976 int tempflag
, int from_tty
)
5978 char *cond_string
= NULL
;
5979 struct symtab_and_line
*sal
= NULL
;
5981 ep_skip_leading_whitespace (&arg
);
5983 cond_string
= ep_parse_optional_if_clause (&arg
);
5985 if ((*arg
!= '\0') && !isspace (*arg
))
5986 error ("Junk at end of arguments.");
5988 if ((ex_event
!= EX_EVENT_THROW
) &&
5989 (ex_event
!= EX_EVENT_CATCH
))
5990 error ("Unsupported or unknown exception event; cannot catch it");
5992 /* See if we can find a callback routine */
5993 sal
= target_enable_exception_callback (ex_event
, 1);
5997 /* We have callbacks from the runtime system for exceptions.
5998 Set a breakpoint on the sal found, if no errors */
5999 if (sal
!= (struct symtab_and_line
*) -1)
6000 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6002 return; /* something went wrong with setting up callbacks */
6006 /* No callbacks from runtime system for exceptions.
6007 Try GNU C++ exception breakpoints using labels in debug info. */
6008 if (ex_event
== EX_EVENT_CATCH
)
6010 handle_gnu_4_16_catch_command (arg
, tempflag
, from_tty
);
6012 else if (ex_event
== EX_EVENT_THROW
)
6014 /* Set a breakpoint on __raise_exception () */
6016 warning ("Unsupported with this platform/compiler combination.");
6017 warning ("Perhaps you can achieve the effect you want by setting");
6018 warning ("a breakpoint on __raise_exception().");
6023 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6024 inside a catch_errors */
6027 cover_target_enable_exception_callback (PTR arg
)
6029 args_for_catchpoint_enable
*args
= arg
;
6030 struct symtab_and_line
*sal
;
6031 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6034 else if (sal
== (struct symtab_and_line
*) -1)
6037 return 1; /*is valid */
6042 /* This is the original v.4.16 and earlier version of the
6043 catch_command_1() function. Now that other flavours of "catch"
6044 have been introduced, and since exception handling can be handled
6045 in other ways (through target ops) also, this is used only for the
6046 GNU C++ exception handling system.
6047 Note: Only the "catch" flavour of GDB 4.16 is handled here. The
6048 "catch NAME" is now no longer allowed in catch_command_1(). Also,
6049 there was no code in GDB 4.16 for "catch throw".
6051 Called from catch_exception_command_1 () */
6055 handle_gnu_4_16_catch_command (char *arg
, int tempflag
, int from_tty
)
6057 /* First, translate ARG into something we can deal with in terms
6060 struct symtabs_and_lines sals
;
6061 struct symtab_and_line sal
;
6062 register struct expression
*cond
= 0;
6063 register struct breakpoint
*b
;
6067 INIT_SAL (&sal
); /* initialize to zeroes */
6069 /* If no arg given, or if first arg is 'if ', all active catch clauses
6070 are breakpointed. */
6072 if (!arg
|| (arg
[0] == 'i' && arg
[1] == 'f'
6073 && (arg
[2] == ' ' || arg
[2] == '\t')))
6075 /* Grab all active catch clauses. */
6076 sals
= get_catch_sals (0);
6080 /* Grab selected catch clauses. */
6081 error ("catch NAME not implemented");
6084 /* Not sure why this code has been disabled. I'm leaving
6085 it disabled. We can never come here now anyway
6086 since we don't allow the "catch NAME" syntax.
6089 /* This isn't used; I don't know what it was for. */
6090 sals
= map_catch_names (arg
, catch_breakpoint
);
6098 for (i
= 0; i
< sals
.nelts
; i
++)
6100 resolve_sal_pc (&sals
.sals
[i
]);
6104 if (arg
[0] == 'i' && arg
[1] == 'f'
6105 && (arg
[2] == ' ' || arg
[2] == '\t'))
6106 cond
= parse_exp_1 ((arg
+= 2, &arg
),
6107 block_for_pc (sals
.sals
[i
].pc
), 0);
6109 error ("Junk at end of arguments.");
6114 for (i
= 0; i
< sals
.nelts
; i
++)
6119 describe_other_breakpoints (sal
.pc
, sal
.section
);
6121 /* Important -- this is an ordinary breakpoint. For platforms
6122 with callback support for exceptions,
6123 create_exception_catchpoint() will create special bp types
6124 (bp_catch_catch and bp_catch_throw), and there is code in
6125 insert_breakpoints() and elsewhere that depends on that. */
6126 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6127 set_breakpoint_count (breakpoint_count
+ 1);
6128 b
->number
= breakpoint_count
;
6131 b
->enable_state
= bp_enabled
;
6132 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6139 warning ("Multiple breakpoints were set.");
6140 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
6146 /* This creates a temporary internal breakpoint
6147 just to placate infrun */
6148 static struct breakpoint
*
6149 create_temp_exception_breakpoint (CORE_ADDR pc
)
6151 struct symtab_and_line sal
;
6152 struct breakpoint
*b
;
6159 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6161 b
->disposition
= disp_del
;
6162 b
->enable_state
= bp_enabled
;
6164 b
->number
= internal_breakpoint_number
--;
6170 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6173 /* The first argument may be an event name, such as "start" or "load".
6174 If so, then handle it as such. If it doesn't match an event name,
6175 then attempt to interpret it as an exception name. (This latter is
6176 the v4.16-and-earlier GDB meaning of the "catch" command.)
6178 First, try to find the bounds of what might be an event name. */
6179 char *arg1_start
= arg
;
6183 if (arg1_start
== NULL
)
6185 /* Old behaviour was to use pre-v-4.16 syntax */
6186 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6188 /* Now, this is not allowed */
6189 error ("Catch requires an event name.");
6192 arg1_end
= ep_find_event_name_end (arg1_start
);
6193 if (arg1_end
== NULL
)
6194 error ("catch requires an event");
6195 arg1_length
= arg1_end
+ 1 - arg1_start
;
6197 /* Try to match what we found against known event names. */
6198 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6200 error ("Catch of signal not yet implemented");
6202 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6204 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6205 tempflag
, from_tty
);
6207 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6209 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6210 tempflag
, from_tty
);
6212 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6214 error ("Catch of thread_start not yet implemented");
6216 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6218 error ("Catch of thread_exit not yet implemented");
6220 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6222 error ("Catch of thread_join not yet implemented");
6224 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6226 error ("Catch of start not yet implemented");
6228 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6230 error ("Catch of exit not yet implemented");
6232 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6234 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6235 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6237 error ("Catch of fork not yet implemented");
6240 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6242 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6243 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6245 error ("Catch of vfork not yet implemented");
6248 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6250 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6251 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6253 error ("Catch of exec not yet implemented");
6256 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6258 #if defined(SOLIB_ADD)
6259 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6261 error ("Catch of load not implemented");
6264 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6266 #if defined(SOLIB_ADD)
6267 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6269 error ("Catch of load not implemented");
6272 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6274 error ("Catch of stop not yet implemented");
6277 /* This doesn't appear to be an event name */
6281 /* Pre-v.4.16 behaviour was to treat the argument
6282 as the name of an exception */
6283 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6284 /* Now this is not allowed */
6285 error ("Unknown event kind specified for catch");
6290 /* Used by the gui, could be made a worker for other things. */
6293 set_breakpoint_sal (struct symtab_and_line sal
)
6295 struct breakpoint
*b
;
6296 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6297 set_breakpoint_count (breakpoint_count
+ 1);
6298 b
->number
= breakpoint_count
;
6305 /* These aren't used; I don't know what they were for. */
6306 /* Disable breakpoints on all catch clauses described in ARGS. */
6308 disable_catch (char *args
)
6310 /* Map the disable command to catch clauses described in ARGS. */
6313 /* Enable breakpoints on all catch clauses described in ARGS. */
6315 enable_catch (char *args
)
6317 /* Map the disable command to catch clauses described in ARGS. */
6320 /* Delete breakpoints on all catch clauses in the active scope. */
6322 delete_catch (char *args
)
6324 /* Map the delete command to catch clauses described in ARGS. */
6329 catch_command (char *arg
, int from_tty
)
6331 catch_command_1 (arg
, 0, from_tty
);
6336 tcatch_command (char *arg
, int from_tty
)
6338 catch_command_1 (arg
, 1, from_tty
);
6343 clear_command (char *arg
, int from_tty
)
6345 register struct breakpoint
*b
, *b1
;
6347 struct symtabs_and_lines sals
;
6348 struct symtab_and_line sal
;
6349 register struct breakpoint
*found
;
6354 sals
= decode_line_spec (arg
, 1);
6359 sals
.sals
= (struct symtab_and_line
*)
6360 xmalloc (sizeof (struct symtab_and_line
));
6361 INIT_SAL (&sal
); /* initialize to zeroes */
6362 sal
.line
= default_breakpoint_line
;
6363 sal
.symtab
= default_breakpoint_symtab
;
6364 sal
.pc
= default_breakpoint_address
;
6365 if (sal
.symtab
== 0)
6366 error ("No source file specified.");
6374 /* For each line spec given, delete bps which correspond
6375 to it. We do this in two loops: the first loop looks at
6376 the initial bp(s) in the chain which should be deleted,
6377 the second goes down the rest of the chain looking ahead
6378 one so it can take those bps off the chain without messing
6382 for (i
= 0; i
< sals
.nelts
; i
++)
6384 /* If exact pc given, clear bpts at that pc.
6385 If line given (pc == 0), clear all bpts on specified line.
6386 If defaulting, clear all bpts on default line
6389 defaulting sal.pc != 0 tests to do
6394 1 0 <can't happen> */
6397 found
= (struct breakpoint
*) 0;
6400 while (breakpoint_chain
6401 /* Why don't we check here that this is not
6402 a watchpoint, etc., as we do below?
6403 I can't make it fail, but don't know
6404 what's stopping the failure: a watchpoint
6405 of the same address as "sal.pc" should
6406 wind up being deleted. */
6408 && (((sal
.pc
&& (breakpoint_chain
->address
== sal
.pc
)) &&
6409 (overlay_debugging
== 0 ||
6410 breakpoint_chain
->section
== sal
.section
))
6411 || ((default_match
|| (0 == sal
.pc
))
6412 && breakpoint_chain
->source_file
!= NULL
6413 && sal
.symtab
!= NULL
6414 && STREQ (breakpoint_chain
->source_file
, sal
.symtab
->filename
)
6415 && breakpoint_chain
->line_number
== sal
.line
)))
6418 b1
= breakpoint_chain
;
6419 breakpoint_chain
= b1
->next
;
6427 && b
->next
->type
!= bp_none
6428 && b
->next
->type
!= bp_watchpoint
6429 && b
->next
->type
!= bp_hardware_watchpoint
6430 && b
->next
->type
!= bp_read_watchpoint
6431 && b
->next
->type
!= bp_access_watchpoint
6432 && (((sal
.pc
&& (b
->next
->address
== sal
.pc
)) &&
6433 (overlay_debugging
== 0 ||
6434 b
->next
->section
== sal
.section
))
6435 || ((default_match
|| (0 == sal
.pc
))
6436 && b
->next
->source_file
!= NULL
6437 && sal
.symtab
!= NULL
6438 && STREQ (b
->next
->source_file
, sal
.symtab
->filename
)
6439 && b
->next
->line_number
== sal
.line
)))
6452 error ("No breakpoint at %s.", arg
);
6454 error ("No breakpoint at this line.");
6458 from_tty
= 1; /* Always report if deleted more than one */
6460 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6461 breakpoints_changed ();
6465 printf_unfiltered ("%d ", found
->number
);
6467 delete_breakpoint (found
);
6471 putchar_unfiltered ('\n');
6476 /* Delete breakpoint in BS if they are `delete' breakpoints and
6477 all breakpoints that are marked for deletion, whether hit or not.
6478 This is called after any breakpoint is hit, or after errors. */
6481 breakpoint_auto_delete (bpstat bs
)
6483 struct breakpoint
*b
, *temp
;
6485 for (; bs
; bs
= bs
->next
)
6486 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6488 delete_breakpoint (bs
->breakpoint_at
);
6490 ALL_BREAKPOINTS_SAFE (b
, temp
)
6492 if (b
->disposition
== disp_del_at_next_stop
)
6493 delete_breakpoint (b
);
6497 /* Delete a breakpoint and clean up all traces of it in the data
6501 delete_breakpoint (struct breakpoint
*bpt
)
6503 register struct breakpoint
*b
;
6507 error ("Internal error (attempted to delete a NULL breakpoint)");
6510 /* Has this bp already been deleted? This can happen because multiple
6511 lists can hold pointers to bp's. bpstat lists are especial culprits.
6513 One example of this happening is a watchpoint's scope bp. When the
6514 scope bp triggers, we notice that the watchpoint is out of scope, and
6515 delete it. We also delete its scope bp. But the scope bp is marked
6516 "auto-deleting", and is already on a bpstat. That bpstat is then
6517 checked for auto-deleting bp's, which are deleted.
6519 A real solution to this problem might involve reference counts in bp's,
6520 and/or giving them pointers back to their referencing bpstat's, and
6521 teaching delete_breakpoint to only free a bp's storage when no more
6522 references were extent. A cheaper bandaid was chosen. */
6523 if (bpt
->type
== bp_none
)
6526 if (delete_breakpoint_hook
)
6527 delete_breakpoint_hook (bpt
);
6528 breakpoint_delete_event (bpt
->number
);
6531 remove_breakpoint (bpt
, mark_inserted
);
6533 if (breakpoint_chain
== bpt
)
6534 breakpoint_chain
= bpt
->next
;
6536 /* If we have callback-style exception catchpoints, don't go through
6537 the adjustments to the C++ runtime library etc. if the inferior
6538 isn't actually running. target_enable_exception_callback for a
6539 null target ops vector gives an undesirable error message, so we
6540 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6541 exceptions are supported in this way, it's OK for now. FIXME */
6542 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6544 static char message1
[] = "Error in deleting catchpoint %d:\n";
6545 static char message
[sizeof (message1
) + 30];
6546 args_for_catchpoint_enable args
;
6548 /* Format possible error msg */
6549 sprintf (message
, message1
, bpt
->number
);
6550 args
.kind
= bpt
->type
== bp_catch_catch
?
6551 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6553 catch_errors (cover_target_enable_exception_callback
, &args
,
6554 message
, RETURN_MASK_ALL
);
6561 b
->next
= bpt
->next
;
6565 check_duplicates (bpt
);
6566 /* If this breakpoint was inserted, and there is another breakpoint
6567 at the same address, we need to insert the other breakpoint. */
6569 && bpt
->type
!= bp_hardware_watchpoint
6570 && bpt
->type
!= bp_read_watchpoint
6571 && bpt
->type
!= bp_access_watchpoint
6572 && bpt
->type
!= bp_catch_fork
6573 && bpt
->type
!= bp_catch_vfork
6574 && bpt
->type
!= bp_catch_exec
)
6577 if (b
->address
== bpt
->address
6578 && b
->section
== bpt
->section
6580 && b
->enable_state
!= bp_disabled
6581 && b
->enable_state
!= bp_shlib_disabled
6582 && b
->enable_state
!= bp_call_disabled
)
6586 /* We should never reach this point if there is a permanent
6587 breakpoint at the same address as the one being deleted.
6588 If there is a permanent breakpoint somewhere, it should
6589 always be the only one inserted. */
6590 if (b
->enable_state
== bp_permanent
)
6591 internal_error (__FILE__
, __LINE__
,
6592 "another breakpoint was inserted on top of "
6593 "a permanent breakpoint");
6595 if (b
->type
== bp_hardware_breakpoint
)
6596 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
6598 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
6602 target_terminal_ours_for_output ();
6603 warning ("Cannot insert breakpoint %d:", b
->number
);
6604 memory_error (val
, b
->address
); /* which bombs us out */
6611 free_command_lines (&bpt
->commands
);
6614 if (bpt
->cond_string
!= NULL
)
6615 xfree (bpt
->cond_string
);
6616 if (bpt
->addr_string
!= NULL
)
6617 xfree (bpt
->addr_string
);
6618 if (bpt
->exp
!= NULL
)
6620 if (bpt
->exp_string
!= NULL
)
6621 xfree (bpt
->exp_string
);
6622 if (bpt
->val
!= NULL
)
6623 value_free (bpt
->val
);
6624 if (bpt
->source_file
!= NULL
)
6625 xfree (bpt
->source_file
);
6626 if (bpt
->dll_pathname
!= NULL
)
6627 xfree (bpt
->dll_pathname
);
6628 if (bpt
->triggered_dll_pathname
!= NULL
)
6629 xfree (bpt
->triggered_dll_pathname
);
6630 if (bpt
->exec_pathname
!= NULL
)
6631 xfree (bpt
->exec_pathname
);
6633 /* Be sure no bpstat's are pointing at it after it's been freed. */
6634 /* FIXME, how can we find all bpstat's?
6635 We just check stop_bpstat for now. */
6636 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6637 if (bs
->breakpoint_at
== bpt
)
6639 bs
->breakpoint_at
= NULL
;
6641 /* we'd call bpstat_clear_actions, but that free's stuff and due
6642 to the multiple pointers pointing to one item with no
6643 reference counts found anywhere through out the bpstat's (how
6644 do you spell fragile?), we don't want to free things twice --
6645 better a memory leak than a corrupt malloc pool! */
6646 bs
->commands
= NULL
;
6649 /* On the chance that someone will soon try again to delete this same
6650 bp, we mark it as deleted before freeing its storage. */
6651 bpt
->type
= bp_none
;
6657 do_delete_breakpoint_cleanup (void *b
)
6659 delete_breakpoint (b
);
6663 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6665 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6669 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6671 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6675 delete_command (char *arg
, int from_tty
)
6677 struct breakpoint
*b
, *temp
;
6681 int breaks_to_delete
= 0;
6683 /* Delete all breakpoints if no argument.
6684 Do not delete internal or call-dummy breakpoints, these
6685 have to be deleted with an explicit breakpoint number argument. */
6688 if (b
->type
!= bp_call_dummy
&&
6689 b
->type
!= bp_shlib_event
&&
6690 b
->type
!= bp_thread_event
&&
6692 breaks_to_delete
= 1;
6695 /* Ask user only if there are some breakpoints to delete. */
6697 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
6699 ALL_BREAKPOINTS_SAFE (b
, temp
)
6701 if (b
->type
!= bp_call_dummy
&&
6702 b
->type
!= bp_shlib_event
&&
6703 b
->type
!= bp_thread_event
&&
6705 delete_breakpoint (b
);
6710 map_breakpoint_numbers (arg
, delete_breakpoint
);
6713 /* Reset a breakpoint given it's struct breakpoint * BINT.
6714 The value we return ends up being the return value from catch_errors.
6715 Unused in this case. */
6718 breakpoint_re_set_one (PTR bint
)
6720 /* get past catch_errs */
6721 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6724 struct symtabs_and_lines sals
;
6726 enum enable_state save_enable
;
6731 warning ("attempted to reset apparently deleted breakpoint #%d?",
6735 case bp_hardware_breakpoint
:
6737 case bp_catch_unload
:
6738 if (b
->addr_string
== NULL
)
6740 /* Anything without a string can't be re-set. */
6741 delete_breakpoint (b
);
6744 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6746 ``And a hack it is, although Apple's Darwin version of GDB
6747 contains an almost identical hack to implement a "future
6748 break" command. It seems to work in many real world cases,
6749 but it is easy to come up with a test case where the patch
6750 doesn't help at all.''
6752 ``It seems that the way GDB implements breakpoints - in -
6753 shared - libraries was designed for a.out shared library
6754 systems (SunOS 4) where shared libraries were loaded at a
6755 fixed address in memory. Since ELF shared libraries can (and
6756 will) be loaded at any address in memory, things break.
6757 Fixing this is not trivial. Therefore, I'm not sure whether
6758 we should add this hack to the branch only. I cannot
6759 guarantee that things will be fixed on the trunk in the near
6762 In case we have a problem, disable this breakpoint. We'll
6763 restore its status if we succeed. Don't disable a
6764 shlib_disabled breakpoint though. There's a fair chance we
6765 can't re-set it if the shared library it's in hasn't been
6767 save_enable
= b
->enable_state
;
6768 if (b
->enable_state
!= bp_shlib_disabled
)
6769 b
->enable_state
= bp_disabled
;
6771 set_language (b
->language
);
6772 input_radix
= b
->input_radix
;
6774 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
);
6775 for (i
= 0; i
< sals
.nelts
; i
++)
6777 resolve_sal_pc (&sals
.sals
[i
]);
6779 /* Reparse conditions, they might contain references to the
6781 if (b
->cond_string
!= NULL
)
6786 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
6789 /* We need to re-set the breakpoint if the address changes... */
6790 if (b
->address
!= sals
.sals
[i
].pc
6791 /* ...or new and old breakpoints both have source files, and
6792 the source file name or the line number changes... */
6793 || (b
->source_file
!= NULL
6794 && sals
.sals
[i
].symtab
!= NULL
6795 && (!STREQ (b
->source_file
, sals
.sals
[i
].symtab
->filename
)
6796 || b
->line_number
!= sals
.sals
[i
].line
)
6798 /* ...or we switch between having a source file and not having
6800 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
6803 if (b
->source_file
!= NULL
)
6804 xfree (b
->source_file
);
6805 if (sals
.sals
[i
].symtab
== NULL
)
6806 b
->source_file
= NULL
;
6809 savestring (sals
.sals
[i
].symtab
->filename
,
6810 strlen (sals
.sals
[i
].symtab
->filename
));
6811 b
->line_number
= sals
.sals
[i
].line
;
6812 b
->address
= sals
.sals
[i
].pc
;
6814 /* Used to check for duplicates here, but that can
6815 cause trouble, as it doesn't check for disable
6820 /* Might be better to do this just once per breakpoint_re_set,
6821 rather than once for every breakpoint. */
6822 breakpoints_changed ();
6824 b
->section
= sals
.sals
[i
].section
;
6825 b
->enable_state
= save_enable
; /* Restore it, this worked. */
6828 /* Now that this is re-enabled, check_duplicates
6830 check_duplicates (b
);
6837 case bp_hardware_watchpoint
:
6838 case bp_read_watchpoint
:
6839 case bp_access_watchpoint
:
6840 innermost_block
= NULL
;
6841 /* The issue arises of what context to evaluate this in. The
6842 same one as when it was set, but what does that mean when
6843 symbols have been re-read? We could save the filename and
6844 functionname, but if the context is more local than that, the
6845 best we could do would be something like how many levels deep
6846 and which index at that particular level, but that's going to
6847 be less stable than filenames or function names. */
6849 /* So for now, just use a global context. */
6852 b
->exp
= parse_expression (b
->exp_string
);
6853 b
->exp_valid_block
= innermost_block
;
6854 mark
= value_mark ();
6856 value_free (b
->val
);
6857 b
->val
= evaluate_expression (b
->exp
);
6858 release_value (b
->val
);
6859 if (VALUE_LAZY (b
->val
))
6860 value_fetch_lazy (b
->val
);
6862 if (b
->cond_string
!= NULL
)
6867 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
6869 if (b
->enable_state
== bp_enabled
)
6871 value_free_to_mark (mark
);
6873 case bp_catch_catch
:
6874 case bp_catch_throw
:
6876 /* We needn't really do anything to reset these, since the mask
6877 that requests them is unaffected by e.g., new libraries being
6880 case bp_catch_vfork
:
6885 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
6887 /* Delete longjmp breakpoints, they will be reset later by
6888 breakpoint_re_set. */
6890 case bp_longjmp_resume
:
6891 delete_breakpoint (b
);
6894 /* This breakpoint is special, it's set up when the inferior
6895 starts and we really don't want to touch it. */
6896 case bp_shlib_event
:
6898 /* Like bp_shlib_event, this breakpoint type is special.
6899 Once it is set up, we do not want to touch it. */
6900 case bp_thread_event
:
6902 /* Keep temporary breakpoints, which can be encountered when we step
6903 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
6904 Otherwise these should have been blown away via the cleanup chain
6905 or by breakpoint_init_inferior when we rerun the executable. */
6908 case bp_watchpoint_scope
:
6910 case bp_step_resume
:
6917 /* Re-set all breakpoints after symbols have been re-loaded. */
6919 breakpoint_re_set (void)
6921 struct breakpoint
*b
, *temp
;
6922 enum language save_language
;
6923 int save_input_radix
;
6924 static char message1
[] = "Error in re-setting breakpoint %d:\n";
6925 char message
[sizeof (message1
) + 30 /* slop */ ];
6927 save_language
= current_language
->la_language
;
6928 save_input_radix
= input_radix
;
6929 ALL_BREAKPOINTS_SAFE (b
, temp
)
6931 /* Format possible error msg */
6932 sprintf (message
, message1
, b
->number
);
6933 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
6935 set_language (save_language
);
6936 input_radix
= save_input_radix
;
6938 #ifdef GET_LONGJMP_TARGET
6939 create_longjmp_breakpoint ("longjmp");
6940 create_longjmp_breakpoint ("_longjmp");
6941 create_longjmp_breakpoint ("siglongjmp");
6942 create_longjmp_breakpoint ("_siglongjmp");
6943 create_longjmp_breakpoint (NULL
);
6947 /* Took this out (temporarily at least), since it produces an extra
6948 blank line at startup. This messes up the gdbtests. -PB */
6949 /* Blank line to finish off all those mention() messages we just printed. */
6950 printf_filtered ("\n");
6954 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
6955 If from_tty is nonzero, it prints a message to that effect,
6956 which ends with a period (no newline). */
6958 /* Reset the thread number of this breakpoint:
6960 - If the breakpoint is for all threads, leave it as-is.
6961 - Else, reset it to the current thread for inferior_ptid. */
6963 breakpoint_re_set_thread (struct breakpoint
*b
)
6965 if (b
->thread
!= -1)
6967 if (in_thread_list (inferior_ptid
))
6968 b
->thread
= pid_to_thread_id (inferior_ptid
);
6973 set_ignore_count (int bptnum
, int count
, int from_tty
)
6975 register struct breakpoint
*b
;
6981 if (b
->number
== bptnum
)
6983 b
->ignore_count
= count
;
6986 else if (count
== 0)
6987 printf_filtered ("Will stop next time breakpoint %d is reached.",
6989 else if (count
== 1)
6990 printf_filtered ("Will ignore next crossing of breakpoint %d.",
6993 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
6995 breakpoints_changed ();
6999 error ("No breakpoint number %d.", bptnum
);
7002 /* Clear the ignore counts of all breakpoints. */
7004 breakpoint_clear_ignore_counts (void)
7006 struct breakpoint
*b
;
7009 b
->ignore_count
= 0;
7012 /* Command to set ignore-count of breakpoint N to COUNT. */
7015 ignore_command (char *args
, int from_tty
)
7021 error_no_arg ("a breakpoint number");
7023 num
= get_number (&p
);
7025 error ("bad breakpoint number: '%s'", args
);
7027 error ("Second argument (specified ignore-count) is missing.");
7029 set_ignore_count (num
,
7030 longest_to_int (value_as_long (parse_and_eval (p
))),
7032 printf_filtered ("\n");
7033 breakpoints_changed ();
7036 /* Call FUNCTION on each of the breakpoints
7037 whose numbers are given in ARGS. */
7040 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7042 register char *p
= args
;
7045 register struct breakpoint
*b
, *tmp
;
7049 error_no_arg ("one or more breakpoint numbers");
7056 num
= get_number_or_range (&p1
);
7059 warning ("bad breakpoint number at or near '%s'", p
);
7063 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7064 if (b
->number
== num
)
7066 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7069 if (related_breakpoint
)
7070 function (related_breakpoint
);
7074 printf_unfiltered ("No breakpoint number %d.\n", num
);
7081 disable_breakpoint (struct breakpoint
*bpt
)
7083 /* Never disable a watchpoint scope breakpoint; we want to
7084 hit them when we leave scope so we can delete both the
7085 watchpoint and its scope breakpoint at that time. */
7086 if (bpt
->type
== bp_watchpoint_scope
)
7089 /* You can't disable permanent breakpoints. */
7090 if (bpt
->enable_state
== bp_permanent
)
7093 bpt
->enable_state
= bp_disabled
;
7095 check_duplicates (bpt
);
7097 if (modify_breakpoint_hook
)
7098 modify_breakpoint_hook (bpt
);
7099 breakpoint_modify_event (bpt
->number
);
7104 disable_command (char *args
, int from_tty
)
7106 register struct breakpoint
*bpt
;
7108 ALL_BREAKPOINTS (bpt
)
7112 warning ("attempted to disable apparently deleted breakpoint #%d?",
7117 case bp_catch_unload
:
7119 case bp_catch_vfork
:
7121 case bp_catch_catch
:
7122 case bp_catch_throw
:
7123 case bp_hardware_breakpoint
:
7125 case bp_hardware_watchpoint
:
7126 case bp_read_watchpoint
:
7127 case bp_access_watchpoint
:
7128 disable_breakpoint (bpt
);
7133 map_breakpoint_numbers (args
, disable_breakpoint
);
7137 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7139 struct frame_info
*save_selected_frame
= NULL
;
7140 int save_selected_frame_level
= -1;
7141 int target_resources_ok
, other_type_used
;
7144 if (bpt
->type
== bp_hardware_breakpoint
)
7147 i
= hw_breakpoint_used_count ();
7148 target_resources_ok
=
7149 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7151 if (target_resources_ok
== 0)
7152 error ("No hardware breakpoint support in the target.");
7153 else if (target_resources_ok
< 0)
7154 error ("Hardware breakpoints used exceeds limit.");
7157 if (bpt
->enable_state
!= bp_permanent
)
7158 bpt
->enable_state
= bp_enabled
;
7159 bpt
->disposition
= disposition
;
7160 check_duplicates (bpt
);
7161 breakpoints_changed ();
7163 if (bpt
->type
== bp_watchpoint
||
7164 bpt
->type
== bp_hardware_watchpoint
||
7165 bpt
->type
== bp_read_watchpoint
||
7166 bpt
->type
== bp_access_watchpoint
)
7168 if (bpt
->exp_valid_block
!= NULL
)
7170 struct frame_info
*fr
=
7172 /* Ensure that we have the current frame. Else, this
7173 next query may pessimistically be answered as, "No,
7174 not within current scope". */
7175 get_current_frame ();
7176 fr
= find_frame_addr_in_frame_chain (bpt
->watchpoint_frame
);
7180 Cannot enable watchpoint %d because the block in which its expression\n\
7181 is valid is not currently in scope.\n", bpt
->number
);
7182 bpt
->enable_state
= bp_disabled
;
7186 save_selected_frame
= selected_frame
;
7187 save_selected_frame_level
= selected_frame_level
;
7188 select_frame (fr
, -1);
7191 value_free (bpt
->val
);
7192 mark
= value_mark ();
7193 bpt
->val
= evaluate_expression (bpt
->exp
);
7194 release_value (bpt
->val
);
7195 if (VALUE_LAZY (bpt
->val
))
7196 value_fetch_lazy (bpt
->val
);
7198 if (bpt
->type
== bp_hardware_watchpoint
||
7199 bpt
->type
== bp_read_watchpoint
||
7200 bpt
->type
== bp_access_watchpoint
)
7202 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7203 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7205 /* Hack around 'unused var' error for some targets here */
7207 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7208 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7209 /* we can consider of type is bp_hardware_watchpoint, convert to
7210 bp_watchpoint in the following condition */
7211 if (target_resources_ok
< 0)
7214 Cannot enable watchpoint %d because target watch resources\n\
7215 have been allocated for other watchpoints.\n", bpt
->number
);
7216 bpt
->enable_state
= bp_disabled
;
7217 value_free_to_mark (mark
);
7222 if (save_selected_frame_level
>= 0)
7223 select_frame (save_selected_frame
, save_selected_frame_level
);
7224 value_free_to_mark (mark
);
7226 if (modify_breakpoint_hook
)
7227 modify_breakpoint_hook (bpt
);
7228 breakpoint_modify_event (bpt
->number
);
7232 enable_breakpoint (struct breakpoint
*bpt
)
7234 do_enable_breakpoint (bpt
, bpt
->disposition
);
7237 /* The enable command enables the specified breakpoints (or all defined
7238 breakpoints) so they once again become (or continue to be) effective
7239 in stopping the inferior. */
7243 enable_command (char *args
, int from_tty
)
7245 register struct breakpoint
*bpt
;
7247 ALL_BREAKPOINTS (bpt
)
7251 warning ("attempted to enable apparently deleted breakpoint #%d?",
7256 case bp_catch_unload
:
7258 case bp_catch_vfork
:
7260 case bp_catch_catch
:
7261 case bp_catch_throw
:
7262 case bp_hardware_breakpoint
:
7264 case bp_hardware_watchpoint
:
7265 case bp_read_watchpoint
:
7266 case bp_access_watchpoint
:
7267 enable_breakpoint (bpt
);
7272 map_breakpoint_numbers (args
, enable_breakpoint
);
7276 enable_once_breakpoint (struct breakpoint
*bpt
)
7278 do_enable_breakpoint (bpt
, disp_disable
);
7283 enable_once_command (char *args
, int from_tty
)
7285 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7289 enable_delete_breakpoint (struct breakpoint
*bpt
)
7291 do_enable_breakpoint (bpt
, disp_del
);
7296 enable_delete_command (char *args
, int from_tty
)
7298 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7301 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7303 struct symtabs_and_lines
7304 decode_line_spec_1 (char *string
, int funfirstline
)
7306 struct symtabs_and_lines sals
;
7308 error ("Empty line specification.");
7309 if (default_breakpoint_valid
)
7310 sals
= decode_line_1 (&string
, funfirstline
,
7311 default_breakpoint_symtab
,
7312 default_breakpoint_line
,
7315 sals
= decode_line_1 (&string
, funfirstline
,
7316 (struct symtab
*) NULL
, 0, (char ***) NULL
);
7318 error ("Junk at end of line specification: %s", string
);
7323 _initialize_breakpoint (void)
7325 struct cmd_list_element
*c
;
7327 breakpoint_chain
= 0;
7328 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7329 before a breakpoint is set. */
7330 breakpoint_count
= 0;
7332 add_com ("ignore", class_breakpoint
, ignore_command
,
7333 "Set ignore-count of breakpoint number N to COUNT.\n\
7334 Usage is `ignore N COUNT'.");
7336 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7338 add_com ("commands", class_breakpoint
, commands_command
,
7339 "Set commands to be executed when a breakpoint is hit.\n\
7340 Give breakpoint number as argument after \"commands\".\n\
7341 With no argument, the targeted breakpoint is the last one set.\n\
7342 The commands themselves follow starting on the next line.\n\
7343 Type a line containing \"end\" to indicate the end of them.\n\
7344 Give \"silent\" as the first line to make the breakpoint silent;\n\
7345 then no output is printed when it is hit, except what the commands print.");
7347 add_com ("condition", class_breakpoint
, condition_command
,
7348 "Specify breakpoint number N to break only if COND is true.\n\
7349 Usage is `condition N COND', where N is an integer and COND is an\n\
7350 expression to be evaluated whenever breakpoint N is reached. ");
7352 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7353 "Set a temporary breakpoint. Args like \"break\" command.\n\
7354 Like \"break\" except the breakpoint is only temporary,\n\
7355 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7356 by using \"enable delete\" on the breakpoint number.");
7357 c
->completer
= location_completer
;
7359 c
= add_com ("txbreak", class_breakpoint
, tbreak_at_finish_command
,
7360 "Set temporary breakpoint at procedure exit. Either there should\n\
7361 be no argument or the argument must be a depth.\n");
7362 c
->completer
= location_completer
;
7364 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7365 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7366 Like \"break\" except the breakpoint requires hardware support,\n\
7367 some target hardware may not have this support.");
7368 c
->completer
= location_completer
;
7370 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7371 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7372 Like \"hbreak\" except the breakpoint is only temporary,\n\
7373 so it will be deleted when hit.");
7374 c
->completer
= location_completer
;
7376 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7377 "Enable some breakpoints.\n\
7378 Give breakpoint numbers (separated by spaces) as arguments.\n\
7379 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7380 This is used to cancel the effect of the \"disable\" command.\n\
7381 With a subcommand you can enable temporarily.",
7382 &enablelist
, "enable ", 1, &cmdlist
);
7384 add_com ("ab", class_breakpoint
, enable_command
,
7385 "Enable some breakpoints.\n\
7386 Give breakpoint numbers (separated by spaces) as arguments.\n\
7387 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7388 This is used to cancel the effect of the \"disable\" command.\n\
7389 With a subcommand you can enable temporarily.");
7391 add_com_alias ("en", "enable", class_breakpoint
, 1);
7393 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7394 "Enable some breakpoints.\n\
7395 Give breakpoint numbers (separated by spaces) as arguments.\n\
7396 This is used to cancel the effect of the \"disable\" command.\n\
7397 May be abbreviated to simply \"enable\".\n",
7398 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7400 add_cmd ("once", no_class
, enable_once_command
,
7401 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7402 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7405 add_cmd ("delete", no_class
, enable_delete_command
,
7406 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7407 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7410 add_cmd ("delete", no_class
, enable_delete_command
,
7411 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7412 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7415 add_cmd ("once", no_class
, enable_once_command
,
7416 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7417 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7420 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7421 "Disable some breakpoints.\n\
7422 Arguments are breakpoint numbers with spaces in between.\n\
7423 To disable all breakpoints, give no argument.\n\
7424 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7425 &disablelist
, "disable ", 1, &cmdlist
);
7426 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7427 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7429 add_com ("sb", class_breakpoint
, disable_command
,
7430 "Disable some breakpoints.\n\
7431 Arguments are breakpoint numbers with spaces in between.\n\
7432 To disable all breakpoints, give no argument.\n\
7433 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7435 add_cmd ("breakpoints", class_alias
, disable_command
,
7436 "Disable some breakpoints.\n\
7437 Arguments are breakpoint numbers with spaces in between.\n\
7438 To disable all breakpoints, give no argument.\n\
7439 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7440 This command may be abbreviated \"disable\".",
7443 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7444 "Delete some breakpoints or auto-display expressions.\n\
7445 Arguments are breakpoint numbers with spaces in between.\n\
7446 To delete all breakpoints, give no argument.\n\
7448 Also a prefix command for deletion of other GDB objects.\n\
7449 The \"unset\" command is also an alias for \"delete\".",
7450 &deletelist
, "delete ", 1, &cmdlist
);
7451 add_com_alias ("d", "delete", class_breakpoint
, 1);
7453 add_com ("db", class_breakpoint
, delete_command
,
7454 "Delete some breakpoints.\n\
7455 Arguments are breakpoint numbers with spaces in between.\n\
7456 To delete all breakpoints, give no argument.\n");
7458 add_cmd ("breakpoints", class_alias
, delete_command
,
7459 "Delete some breakpoints or auto-display expressions.\n\
7460 Arguments are breakpoint numbers with spaces in between.\n\
7461 To delete all breakpoints, give no argument.\n\
7462 This command may be abbreviated \"delete\".",
7465 add_com ("clear", class_breakpoint
, clear_command
,
7466 concat ("Clear breakpoint at specified line or function.\n\
7467 Argument may be line number, function name, or \"*\" and an address.\n\
7468 If line number is specified, all breakpoints in that line are cleared.\n\
7469 If function is specified, breakpoints at beginning of function are cleared.\n\
7470 If an address is specified, breakpoints at that address are cleared.\n\n",
7471 "With no argument, clears all breakpoints in the line that the selected frame\n\
7474 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7476 c
= add_com ("break", class_breakpoint
, break_command
,
7477 concat ("Set breakpoint at specified line or function.\n\
7478 Argument may be line number, function name, or \"*\" and an address.\n\
7479 If line number is specified, break at start of code for that line.\n\
7480 If function is specified, break at start of code for that function.\n\
7481 If an address is specified, break at that exact address.\n",
7482 "With no arg, uses current execution address of selected stack frame.\n\
7483 This is useful for breaking on return to a stack frame.\n\
7485 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7487 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7488 c
->completer
= location_completer
;
7490 add_com_alias ("b", "break", class_run
, 1);
7491 add_com_alias ("br", "break", class_run
, 1);
7492 add_com_alias ("bre", "break", class_run
, 1);
7493 add_com_alias ("brea", "break", class_run
, 1);
7495 add_com ("xbreak", class_breakpoint
, break_at_finish_command
,
7496 concat ("Set breakpoint at procedure exit. \n\
7497 Argument may be function name, or \"*\" and an address.\n\
7498 If function is specified, break at end of code for that function.\n\
7499 If an address is specified, break at the end of the function that contains \n\
7500 that exact address.\n",
7501 "With no arg, uses current execution address of selected stack frame.\n\
7502 This is useful for breaking on return to a stack frame.\n\
7504 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7506 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7507 add_com_alias ("xb", "xbreak", class_breakpoint
, 1);
7508 add_com_alias ("xbr", "xbreak", class_breakpoint
, 1);
7509 add_com_alias ("xbre", "xbreak", class_breakpoint
, 1);
7510 add_com_alias ("xbrea", "xbreak", class_breakpoint
, 1);
7514 add_com_alias ("ba", "break", class_breakpoint
, 1);
7515 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7516 add_com ("bx", class_breakpoint
, break_at_finish_at_depth_command
,
7517 "Set breakpoint at procedure exit. Either there should\n\
7518 be no argument or the argument must be a depth.\n");
7523 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7524 "Break in function/address or break at a line in the current file.",
7525 &stoplist
, "stop ", 1, &cmdlist
);
7526 add_cmd ("in", class_breakpoint
, stopin_command
,
7527 "Break in function or address.\n", &stoplist
);
7528 add_cmd ("at", class_breakpoint
, stopat_command
,
7529 "Break at a line in the current file.\n", &stoplist
);
7530 add_com ("status", class_info
, breakpoints_info
,
7531 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7532 The \"Type\" column indicates one of:\n\
7533 \tbreakpoint - normal breakpoint\n\
7534 \twatchpoint - watchpoint\n\
7535 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7536 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7537 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7538 address and file/line number respectively.\n\n",
7539 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7540 are set to the address of the last breakpoint listed.\n\n\
7541 Convenience variable \"$bpnum\" contains the number of the last\n\
7542 breakpoint set.", NULL
));
7545 add_info ("breakpoints", breakpoints_info
,
7546 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7547 The \"Type\" column indicates one of:\n\
7548 \tbreakpoint - normal breakpoint\n\
7549 \twatchpoint - watchpoint\n\
7550 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7551 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7552 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7553 address and file/line number respectively.\n\n",
7554 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7555 are set to the address of the last breakpoint listed.\n\n\
7556 Convenience variable \"$bpnum\" contains the number of the last\n\
7557 breakpoint set.", NULL
));
7560 add_com ("lb", class_breakpoint
, breakpoints_info
,
7561 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7562 The \"Type\" column indicates one of:\n\
7563 \tbreakpoint - normal breakpoint\n\
7564 \twatchpoint - watchpoint\n\
7565 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7566 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7567 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7568 address and file/line number respectively.\n\n",
7569 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7570 are set to the address of the last breakpoint listed.\n\n\
7571 Convenience variable \"$bpnum\" contains the number of the last\n\
7572 breakpoint set.", NULL
));
7574 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7575 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7576 The \"Type\" column indicates one of:\n\
7577 \tbreakpoint - normal breakpoint\n\
7578 \twatchpoint - watchpoint\n\
7579 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7580 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7581 \tuntil - internal breakpoint used by the \"until\" command\n\
7582 \tfinish - internal breakpoint used by the \"finish\" command\n",
7583 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7584 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7585 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7586 address and file/line number respectively.\n\n",
7587 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7588 are set to the address of the last breakpoint listed.\n\n\
7589 Convenience variable \"$bpnum\" contains the number of the last\n\
7590 breakpoint set.", NULL
),
7591 &maintenanceinfolist
);
7593 add_com ("catch", class_breakpoint
, catch_command
,
7594 "Set catchpoints to catch events.\n\
7595 Raised signals may be caught:\n\
7596 \tcatch signal - all signals\n\
7597 \tcatch signal <signame> - a particular signal\n\
7598 Raised exceptions may be caught:\n\
7599 \tcatch throw - all exceptions, when thrown\n\
7600 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7601 \tcatch catch - all exceptions, when caught\n\
7602 \tcatch catch <exceptname> - a particular exception, when caught\n\
7603 Thread or process events may be caught:\n\
7604 \tcatch thread_start - any threads, just after creation\n\
7605 \tcatch thread_exit - any threads, just before expiration\n\
7606 \tcatch thread_join - any threads, just after joins\n\
7607 Process events may be caught:\n\
7608 \tcatch start - any processes, just after creation\n\
7609 \tcatch exit - any processes, just before expiration\n\
7610 \tcatch fork - calls to fork()\n\
7611 \tcatch vfork - calls to vfork()\n\
7612 \tcatch exec - calls to exec()\n\
7613 Dynamically-linked library events may be caught:\n\
7614 \tcatch load - loads of any library\n\
7615 \tcatch load <libname> - loads of a particular library\n\
7616 \tcatch unload - unloads of any library\n\
7617 \tcatch unload <libname> - unloads of a particular library\n\
7618 The act of your program's execution stopping may also be caught:\n\
7620 C++ exceptions may be caught:\n\
7621 \tcatch throw - all exceptions, when thrown\n\
7622 \tcatch catch - all exceptions, when caught\n\
7624 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7625 after a fork or vfork is caught.\n\n\
7626 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7628 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7629 "Set temporary catchpoints to catch events.\n\
7630 Args like \"catch\" command.\n\
7631 Like \"catch\" except the catchpoint is only temporary,\n\
7632 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7633 by using \"enable delete\" on the catchpoint number.");
7635 c
= add_com ("watch", class_breakpoint
, watch_command
,
7636 "Set a watchpoint for an expression.\n\
7637 A watchpoint stops execution of your program whenever the value of\n\
7638 an expression changes.");
7639 c
->completer
= location_completer
;
7641 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
7642 "Set a read watchpoint for an expression.\n\
7643 A watchpoint stops execution of your program whenever the value of\n\
7644 an expression is read.");
7645 c
->completer
= location_completer
;
7647 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
7648 "Set a watchpoint for an expression.\n\
7649 A watchpoint stops execution of your program whenever the value of\n\
7650 an expression is either read or written.");
7651 c
->completer
= location_completer
;
7653 add_info ("watchpoints", breakpoints_info
,
7654 "Synonym for ``info breakpoints''.");
7657 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
7658 (char *) &can_use_hw_watchpoints
,
7659 "Set debugger's willingness to use watchpoint hardware.\n\
7660 If zero, gdb will not use hardware for new watchpoints, even if\n\
7661 such is available. (However, any hardware watchpoints that were\n\
7662 created before setting this to nonzero, will continue to use watchpoint\n\
7665 add_show_from_set (c
, &showlist
);
7667 can_use_hw_watchpoints
= 1;