1 /* Everything about breakpoints, for GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
5 Free Software Foundation, Inc.
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., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
28 #include "breakpoint.h"
30 #include "expression.h"
36 #include "gdbthread.h"
39 #include "gdb_string.h"
46 #include "completer.h"
49 #include "cli/cli-script.h"
50 #include "gdb_assert.h"
55 #include "exceptions.h"
60 #include "gdb-events.h"
61 #include "mi/mi-common.h"
63 /* Prototypes for local functions. */
65 static void until_break_command_continuation (struct continuation_arg
*arg
);
67 static void catch_command_1 (char *, int, int);
69 static void enable_delete_command (char *, int);
71 static void enable_delete_breakpoint (struct breakpoint
*);
73 static void enable_once_command (char *, int);
75 static void enable_once_breakpoint (struct breakpoint
*);
77 static void disable_command (char *, int);
79 static void enable_command (char *, int);
81 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
83 static void ignore_command (char *, int);
85 static int breakpoint_re_set_one (void *);
87 static void clear_command (char *, int);
89 static void catch_command (char *, int);
91 static void watch_command (char *, int);
93 static int can_use_hardware_watchpoint (struct value
*);
95 static int break_command_1 (char *, int, int, struct breakpoint
*);
97 static void mention (struct breakpoint
*);
99 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
101 static void check_duplicates (struct breakpoint
*);
103 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
105 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
,
108 static void describe_other_breakpoints (CORE_ADDR
, asection
*, int);
110 static void breakpoints_info (char *, int);
112 static void breakpoint_1 (int, int);
114 static bpstat
bpstat_alloc (struct breakpoint
*, bpstat
);
116 static int breakpoint_cond_eval (void *);
118 static void cleanup_executing_breakpoints (void *);
120 static void commands_command (char *, int);
122 static void condition_command (char *, int);
124 static int get_number_trailer (char **, int);
126 void set_breakpoint_count (int);
135 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
137 static enum print_stop_action
print_it_typical (bpstat
);
139 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
143 enum exception_event_kind kind
;
146 args_for_catchpoint_enable
;
148 static int watchpoint_check (void *);
150 static int cover_target_enable_exception_callback (void *);
152 static void maintenance_info_breakpoints (char *, int);
154 static void create_longjmp_breakpoint (char *);
156 static void create_overlay_event_breakpoint (char *);
158 static int hw_breakpoint_used_count (void);
160 static int hw_watchpoint_used_count (enum bptype
, int *);
162 static void hbreak_command (char *, int);
164 static void thbreak_command (char *, int);
166 static void watch_command_1 (char *, int, int);
168 static void rwatch_command (char *, int);
170 static void awatch_command (char *, int);
172 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
174 static void solib_load_unload_1 (char *hookname
,
177 char *cond_string
, enum bptype bp_kind
);
179 static void create_fork_vfork_event_catchpoint (int tempflag
,
181 enum bptype bp_kind
);
183 static void stop_command (char *arg
, int from_tty
);
185 static void stopin_command (char *arg
, int from_tty
);
187 static void stopat_command (char *arg
, int from_tty
);
189 static char *ep_find_event_name_end (char *arg
);
191 static char *ep_parse_optional_if_clause (char **arg
);
193 static char *ep_parse_optional_filename (char **arg
);
195 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
196 enum exception_event_kind ex_event
,
197 struct symtab_and_line
*sal
);
199 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
200 char *arg
, int tempflag
, int from_tty
);
202 static void tcatch_command (char *arg
, int from_tty
);
204 static void ep_skip_leading_whitespace (char **s
);
206 static int single_step_breakpoint_inserted_here_p (CORE_ADDR pc
);
208 /* Prototypes for exported functions. */
210 /* If FALSE, gdb will not use hardware support for watchpoints, even
211 if such is available. */
212 static int can_use_hw_watchpoints
;
215 show_can_use_hw_watchpoints (struct ui_file
*file
, int from_tty
,
216 struct cmd_list_element
*c
,
219 fprintf_filtered (file
, _("\
220 Debugger's willingness to use watchpoint hardware is %s.\n"),
224 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
225 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
226 for unrecognized breakpoint locations.
227 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
228 static enum auto_boolean pending_break_support
;
230 show_pending_break_support (struct ui_file
*file
, int from_tty
,
231 struct cmd_list_element
*c
,
234 fprintf_filtered (file
, _("\
235 Debugger's behavior regarding pending breakpoints is %s.\n"),
239 /* If 1, gdb will automatically use hardware breakpoints for breakpoints
240 set with "break" but falling in read-only memory.
241 If 0, gdb will warn about such breakpoints, but won't automatically
242 use hardware breakpoints. */
243 static int automatic_hardware_breakpoints
;
245 show_automatic_hardware_breakpoints (struct ui_file
*file
, int from_tty
,
246 struct cmd_list_element
*c
,
249 fprintf_filtered (file
, _("\
250 Automatic usage of hardware breakpoints is %s.\n"),
255 void _initialize_breakpoint (void);
257 extern int addressprint
; /* Print machine addresses? */
259 /* Are we executing breakpoint commands? */
260 static int executing_breakpoint_commands
;
262 /* Are overlay event breakpoints enabled? */
263 static int overlay_events_enabled
;
265 /* Walk the following statement or block through all breakpoints.
266 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
269 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
271 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
272 for (B = breakpoint_chain; \
273 B ? (TMP=B->next, 1): 0; \
276 /* Similar iterators for the low-level breakpoints. */
278 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->next)
280 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
281 for (B = bp_location_chain; \
282 B ? (TMP=B->next, 1): 0; \
285 /* True if breakpoint hit counts should be displayed in breakpoint info. */
287 int show_breakpoint_hit_counts
= 1;
289 /* Chains of all breakpoints defined. */
291 struct breakpoint
*breakpoint_chain
;
293 struct bp_location
*bp_location_chain
;
295 /* Number of last breakpoint made. */
297 int breakpoint_count
;
299 /* Pointer to current exception event record */
300 static struct exception_event_record
*current_exception_event
;
302 /* This function returns a pointer to the string representation of the
303 pathname of the dynamically-linked library that has just been
306 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
307 or undefined results are guaranteed.
309 This string's contents are only valid immediately after the
310 inferior has stopped in the dynamic linker hook, and becomes
311 invalid as soon as the inferior is continued. Clients should make
312 a copy of this string if they wish to continue the inferior and
313 then access the string. */
315 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
316 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
319 /* This function returns a pointer to the string representation of the
320 pathname of the dynamically-linked library that has just been
323 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
324 TRUE, or undefined results are guaranteed.
326 This string's contents are only valid immediately after the
327 inferior has stopped in the dynamic linker hook, and becomes
328 invalid as soon as the inferior is continued. Clients should make
329 a copy of this string if they wish to continue the inferior and
330 then access the string. */
332 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
333 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
336 /* This function is called by the "catch load" command. It allows the
337 debugger to be notified by the dynamic linker when a specified
338 library file (or any library file, if filename is NULL) is loaded. */
340 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
341 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
342 error (_("catch of library loads not yet implemented on this platform"))
345 /* This function is called by the "catch unload" command. It allows
346 the debugger to be notified by the dynamic linker when a specified
347 library file (or any library file, if filename is NULL) is
350 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
351 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid, tempflag, filename, cond_string) \
352 error (_("catch of library unloads not yet implemented on this platform"))
355 /* Return whether a breakpoint is an active enabled breakpoint. */
357 breakpoint_enabled (struct breakpoint
*b
)
359 return (b
->enable_state
== bp_enabled
&& !b
->pending
);
362 /* Set breakpoint count to NUM. */
365 set_breakpoint_count (int num
)
367 breakpoint_count
= num
;
368 set_internalvar (lookup_internalvar ("bpnum"),
369 value_from_longest (builtin_type_int
, (LONGEST
) num
));
372 /* Used in run_command to zero the hit count when a new run starts. */
375 clear_breakpoint_hit_counts (void)
377 struct breakpoint
*b
;
383 /* Default address, symtab and line to put a breakpoint at
384 for "break" command with no arg.
385 if default_breakpoint_valid is zero, the other three are
386 not valid, and "break" with no arg is an error.
388 This set by print_stack_frame, which calls set_default_breakpoint. */
390 int default_breakpoint_valid
;
391 CORE_ADDR default_breakpoint_address
;
392 struct symtab
*default_breakpoint_symtab
;
393 int default_breakpoint_line
;
395 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
396 Advance *PP after the string and any trailing whitespace.
398 Currently the string can either be a number or "$" followed by the name
399 of a convenience variable. Making it an expression wouldn't work well
400 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
402 If the string is a NULL pointer, that denotes the last breakpoint.
404 TRAILER is a character which can be found after the number; most
405 commonly this is `-'. If you don't want a trailer, use \0. */
407 get_number_trailer (char **pp
, int trailer
)
409 int retval
= 0; /* default */
413 /* Empty line means refer to the last breakpoint. */
414 return breakpoint_count
;
417 /* Make a copy of the name, so we can null-terminate it
418 to pass to lookup_internalvar(). */
423 while (isalnum (*p
) || *p
== '_')
425 varname
= (char *) alloca (p
- start
+ 1);
426 strncpy (varname
, start
, p
- start
);
427 varname
[p
- start
] = '\0';
428 val
= value_of_internalvar (lookup_internalvar (varname
));
429 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_INT
)
430 retval
= (int) value_as_long (val
);
433 printf_filtered (_("Convenience variable must have integer value.\n"));
441 while (*p
>= '0' && *p
<= '9')
444 /* There is no number here. (e.g. "cond a == b"). */
446 /* Skip non-numeric token */
447 while (*p
&& !isspace((int) *p
))
449 /* Return zero, which caller must interpret as error. */
455 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
457 /* Trailing junk: return 0 and let caller print error msg. */
458 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
469 /* Like get_number_trailer, but don't allow a trailer. */
471 get_number (char **pp
)
473 return get_number_trailer (pp
, '\0');
476 /* Parse a number or a range.
477 * A number will be of the form handled by get_number.
478 * A range will be of the form <number1> - <number2>, and
479 * will represent all the integers between number1 and number2,
482 * While processing a range, this fuction is called iteratively;
483 * At each call it will return the next value in the range.
485 * At the beginning of parsing a range, the char pointer PP will
486 * be advanced past <number1> and left pointing at the '-' token.
487 * Subsequent calls will not advance the pointer until the range
488 * is completed. The call that completes the range will advance
489 * pointer PP past <number2>.
493 get_number_or_range (char **pp
)
495 static int last_retval
, end_value
;
496 static char *end_ptr
;
497 static int in_range
= 0;
501 /* Default case: pp is pointing either to a solo number,
502 or to the first number of a range. */
503 last_retval
= get_number_trailer (pp
, '-');
508 /* This is the start of a range (<number1> - <number2>).
509 Skip the '-', parse and remember the second number,
510 and also remember the end of the final token. */
514 while (isspace ((int) *end_ptr
))
515 end_ptr
++; /* skip white space */
516 end_value
= get_number (temp
);
517 if (end_value
< last_retval
)
519 error (_("inverted range"));
521 else if (end_value
== last_retval
)
523 /* degenerate range (number1 == number2). Advance the
524 token pointer so that the range will be treated as a
533 error (_("negative value"));
536 /* pp points to the '-' that betokens a range. All
537 number-parsing has already been done. Return the next
538 integer value (one greater than the saved previous value).
539 Do not advance the token pointer 'pp' until the end of range
542 if (++last_retval
== end_value
)
544 /* End of range reached; advance token pointer. */
554 /* condition N EXP -- set break condition of breakpoint N to EXP. */
557 condition_command (char *arg
, int from_tty
)
559 struct breakpoint
*b
;
564 error_no_arg (_("breakpoint number"));
567 bnum
= get_number (&p
);
569 error (_("Bad breakpoint argument: '%s'"), arg
);
572 if (b
->number
== bnum
)
579 if (b
->cond_string
!= NULL
)
580 xfree (b
->cond_string
);
585 b
->cond_string
= NULL
;
587 printf_filtered (_("Breakpoint %d now unconditional.\n"), bnum
);
592 /* I don't know if it matters whether this is the string the user
593 typed in or the decompiled expression. */
594 b
->cond_string
= savestring (arg
, strlen (arg
));
597 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
599 error (_("Junk at end of expression"));
602 breakpoints_changed ();
603 breakpoint_modify_event (b
->number
);
607 error (_("No breakpoint number %d."), bnum
);
611 commands_command (char *arg
, int from_tty
)
613 struct breakpoint
*b
;
616 struct command_line
*l
;
618 /* If we allowed this, we would have problems with when to
619 free the storage, if we change the commands currently
622 if (executing_breakpoint_commands
)
623 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
626 bnum
= get_number (&p
);
629 error (_("Unexpected extra arguments following breakpoint number."));
632 if (b
->number
== bnum
)
634 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
636 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
637 l
= read_command_lines (tmpbuf
, from_tty
);
638 do_cleanups (cleanups
);
639 free_command_lines (&b
->commands
);
641 breakpoints_changed ();
642 breakpoint_modify_event (b
->number
);
645 error (_("No breakpoint number %d."), bnum
);
648 /* Like commands_command, but instead of reading the commands from
649 input stream, takes them from an already parsed command structure.
651 This is used by cli-script.c to DTRT with breakpoint commands
652 that are part of if and while bodies. */
653 enum command_control_type
654 commands_from_control_command (char *arg
, struct command_line
*cmd
)
656 struct breakpoint
*b
;
660 /* If we allowed this, we would have problems with when to
661 free the storage, if we change the commands currently
664 if (executing_breakpoint_commands
)
665 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
667 /* An empty string for the breakpoint number means the last
668 breakpoint, but get_number expects a NULL pointer. */
673 bnum
= get_number (&p
);
676 error (_("Unexpected extra arguments following breakpoint number."));
679 if (b
->number
== bnum
)
681 free_command_lines (&b
->commands
);
682 if (cmd
->body_count
!= 1)
683 error (_("Invalid \"commands\" block structure."));
684 /* We need to copy the commands because if/while will free the
685 list after it finishes execution. */
686 b
->commands
= copy_command_lines (cmd
->body_list
[0]);
687 breakpoints_changed ();
688 breakpoint_modify_event (b
->number
);
689 return simple_control
;
691 error (_("No breakpoint number %d."), bnum
);
694 /* Like target_read_memory() but if breakpoints are inserted, return
695 the shadow contents instead of the breakpoints themselves.
697 Read "memory data" from whatever target or inferior we have.
698 Returns zero if successful, errno value if not. EIO is used
699 for address out of bounds. If breakpoints are inserted, returns
700 shadow contents, not the breakpoints themselves. From breakpoint.c. */
703 read_memory_nobpt (CORE_ADDR memaddr
, gdb_byte
*myaddr
, unsigned len
)
706 struct bp_location
*b
;
707 CORE_ADDR bp_addr
= 0;
710 if (gdbarch_breakpoint_from_pc (current_gdbarch
, &bp_addr
, &bp_size
) == NULL
)
711 /* No breakpoints on this machine. */
712 return target_read_memory (memaddr
, myaddr
, len
);
716 if (b
->owner
->type
== bp_none
)
717 warning (_("reading through apparently deleted breakpoint #%d?"),
720 if (b
->loc_type
!= bp_loc_software_breakpoint
)
724 /* Addresses and length of the part of the breakpoint that
726 bp_addr
= b
->target_info
.placed_address
;
727 bp_size
= b
->target_info
.shadow_len
;
729 /* bp isn't valid, or doesn't shadow memory. */
731 if (bp_addr
+ bp_size
<= memaddr
)
732 /* The breakpoint is entirely before the chunk of memory we
735 if (bp_addr
>= memaddr
+ len
)
736 /* The breakpoint is entirely after the chunk of memory we are
739 /* Copy the breakpoint from the shadow contents, and recurse for
740 the things before and after. */
742 /* Offset within shadow_contents. */
745 if (bp_addr
< memaddr
)
747 /* Only copy the second part of the breakpoint. */
748 bp_size
-= memaddr
- bp_addr
;
749 bptoffset
= memaddr
- bp_addr
;
753 if (bp_addr
+ bp_size
> memaddr
+ len
)
755 /* Only copy the first part of the breakpoint. */
756 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
759 memcpy (myaddr
+ bp_addr
- memaddr
,
760 b
->target_info
.shadow_contents
+ bptoffset
, bp_size
);
762 if (bp_addr
> memaddr
)
764 /* Copy the section of memory before the breakpoint. */
765 status
= read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
770 if (bp_addr
+ bp_size
< memaddr
+ len
)
772 /* Copy the section of memory after the breakpoint. */
773 status
= read_memory_nobpt (bp_addr
+ bp_size
,
774 myaddr
+ bp_addr
+ bp_size
- memaddr
,
775 memaddr
+ len
- (bp_addr
+ bp_size
));
782 /* Nothing overlaps. Just call read_memory_noerr. */
783 return target_read_memory (memaddr
, myaddr
, len
);
787 /* A wrapper function for inserting catchpoints. */
789 insert_catchpoint (struct ui_out
*uo
, void *args
)
791 struct breakpoint
*b
= (struct breakpoint
*) args
;
797 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
800 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
803 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
806 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
811 /* Helper routine: free the value chain for a breakpoint (watchpoint). */
814 free_valchain (struct bp_location
*b
)
819 /* Free the saved value chain. We will construct a new one
820 the next time the watchpoint is inserted. */
821 for (v
= b
->owner
->val_chain
; v
; v
= n
)
826 b
->owner
->val_chain
= NULL
;
829 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
830 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
831 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
833 NOTE drow/2003-09-09: This routine could be broken down to an object-style
834 method for each breakpoint or catchpoint type. */
836 insert_bp_location (struct bp_location
*bpt
,
837 struct ui_file
*tmp_error_stream
,
838 int *disabled_breaks
, int *process_warning
,
839 int *hw_breakpoint_error
)
843 /* Permanent breakpoints cannot be inserted or removed. Disabled
844 breakpoints should not be inserted. */
845 if (!breakpoint_enabled (bpt
->owner
))
848 if (bpt
->inserted
|| bpt
->duplicate
)
851 /* Initialize the target-specific information. */
852 memset (&bpt
->target_info
, 0, sizeof (bpt
->target_info
));
853 bpt
->target_info
.placed_address
= bpt
->address
;
855 if (bpt
->loc_type
== bp_loc_software_breakpoint
856 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
858 if (bpt
->owner
->type
!= bp_hardware_breakpoint
)
860 /* If the explicitly specified breakpoint type
861 is not hardware breakpoint, check the memory map to see
862 if the breakpoint address is in read only memory or not.
863 Two important cases are:
864 - location type is not hardware breakpoint, memory
865 is readonly. We change the type of the location to
867 - location type is hardware breakpoint, memory is read-write.
868 This means we've previously made the location hardware one, but
869 then the memory map changed, so we undo.
871 When breakpoints are removed, remove_breakpoints will
872 use location types we've just set here, the only possible
873 problem is that memory map has changed during running program,
874 but it's not going to work anyway with current gdb. */
875 struct mem_region
*mr
876 = lookup_mem_region (bpt
->target_info
.placed_address
);
880 if (automatic_hardware_breakpoints
)
883 enum bp_loc_type new_type
;
885 if (mr
->attrib
.mode
!= MEM_RW
)
886 new_type
= bp_loc_hardware_breakpoint
;
888 new_type
= bp_loc_software_breakpoint
;
890 if (new_type
!= bpt
->loc_type
)
893 bpt
->loc_type
= new_type
;
896 fprintf_filtered (gdb_stdout
, _("\
897 Note: automatically using hardware breakpoints for read-only addresses.\n"));
902 else if (bpt
->loc_type
== bp_loc_software_breakpoint
903 && mr
->attrib
.mode
!= MEM_RW
)
904 warning (_("cannot set software breakpoint at readonly address %s"),
905 paddr (bpt
->address
));
909 /* First check to see if we have to handle an overlay. */
910 if (overlay_debugging
== ovly_off
911 || bpt
->section
== NULL
912 || !(section_is_overlay (bpt
->section
)))
914 /* No overlay handling: just set the breakpoint. */
916 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
917 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
919 val
= target_insert_breakpoint (&bpt
->target_info
);
923 /* This breakpoint is in an overlay section.
924 Shall we set a breakpoint at the LMA? */
925 if (!overlay_events_enabled
)
927 /* Yes -- overlay event support is not active,
928 so we must try to set a breakpoint at the LMA.
929 This will not work for a hardware breakpoint. */
930 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
931 warning (_("hardware breakpoint %d not supported in overlay!"),
935 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
937 /* Set a software (trap) breakpoint at the LMA. */
938 bpt
->overlay_target_info
= bpt
->target_info
;
939 bpt
->overlay_target_info
.placed_address
= addr
;
940 val
= target_insert_breakpoint (&bpt
->overlay_target_info
);
942 fprintf_unfiltered (tmp_error_stream
,
943 "Overlay breakpoint %d failed: in ROM?",
947 /* Shall we set a breakpoint at the VMA? */
948 if (section_is_mapped (bpt
->section
))
950 /* Yes. This overlay section is mapped into memory. */
951 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
952 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
954 val
= target_insert_breakpoint (&bpt
->target_info
);
958 /* No. This breakpoint will not be inserted.
959 No error, but do not mark the bp as 'inserted'. */
966 /* Can't set the breakpoint. */
967 if (solib_address (bpt
->address
))
969 /* See also: disable_breakpoints_in_shlibs. */
971 bpt
->owner
->enable_state
= bp_shlib_disabled
;
972 if (!*disabled_breaks
)
974 fprintf_unfiltered (tmp_error_stream
,
975 "Cannot insert breakpoint %d.\n",
977 fprintf_unfiltered (tmp_error_stream
,
978 "Temporarily disabling shared library breakpoints:\n");
980 *disabled_breaks
= 1;
981 fprintf_unfiltered (tmp_error_stream
,
982 "breakpoint #%d\n", bpt
->owner
->number
);
986 #ifdef ONE_PROCESS_WRITETEXT
987 *process_warning
= 1;
989 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
991 *hw_breakpoint_error
= 1;
992 fprintf_unfiltered (tmp_error_stream
,
993 "Cannot insert hardware breakpoint %d.\n",
998 fprintf_unfiltered (tmp_error_stream
,
999 "Cannot insert breakpoint %d.\n",
1000 bpt
->owner
->number
);
1001 fprintf_filtered (tmp_error_stream
,
1002 "Error accessing memory address ");
1003 deprecated_print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
1004 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1005 safe_strerror (val
));
1016 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
1017 /* NOTE drow/2003-09-08: This state only exists for removing
1018 watchpoints. It's not clear that it's necessary... */
1019 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
1021 /* FIXME drow/2003-09-08: This code sets multiple hardware watchpoints
1022 based on the expression. Ideally this should happen at a higher level,
1023 and there should be one bp_location for each computed address we
1024 must watch. As soon as a many-to-one mapping is available I'll
1027 int within_current_scope
;
1028 struct value
*mark
= value_mark ();
1030 struct frame_id saved_frame_id
;
1032 /* Save the current frame's ID so we can restore it after
1033 evaluating the watchpoint expression on its own frame. */
1034 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
1035 took a frame parameter, so that we didn't have to change the
1037 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
1039 /* Determine if the watchpoint is within scope. */
1040 if (bpt
->owner
->exp_valid_block
== NULL
)
1041 within_current_scope
= 1;
1044 struct frame_info
*fi
;
1045 fi
= frame_find_by_id (bpt
->owner
->watchpoint_frame
);
1046 within_current_scope
= (fi
!= NULL
);
1047 if (within_current_scope
)
1051 if (within_current_scope
)
1053 free_valchain (bpt
);
1055 /* Evaluate the expression and cut the chain of values
1056 produced off from the value chain.
1058 Make sure the value returned isn't lazy; we use
1059 laziness to determine what memory GDB actually needed
1060 in order to compute the value of the expression. */
1061 v
= evaluate_expression (bpt
->owner
->exp
);
1063 value_release_to_mark (mark
);
1065 bpt
->owner
->val_chain
= v
;
1068 /* Look at each value on the value chain. */
1069 for (; v
; v
= value_next (v
))
1071 /* If it's a memory location, and GDB actually needed
1072 its contents to evaluate the expression, then we
1074 if (VALUE_LVAL (v
) == lval_memory
1075 && ! value_lazy (v
))
1077 struct type
*vtype
= check_typedef (value_type (v
));
1079 /* We only watch structs and arrays if user asked
1080 for it explicitly, never if they just happen to
1081 appear in the middle of some value chain. */
1082 if (v
== bpt
->owner
->val_chain
1083 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1084 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1089 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
1090 len
= TYPE_LENGTH (value_type (v
));
1092 if (bpt
->owner
->type
== bp_read_watchpoint
)
1094 else if (bpt
->owner
->type
== bp_access_watchpoint
)
1097 val
= target_insert_watchpoint (addr
, len
, type
);
1100 /* Don't exit the loop, try to insert
1101 every value on the value chain. That's
1102 because we will be removing all the
1103 watches below, and removing a
1104 watchpoint we didn't insert could have
1112 /* Failure to insert a watchpoint on any memory value in the
1113 value chain brings us here. */
1116 remove_breakpoint (bpt
, mark_uninserted
);
1117 *hw_breakpoint_error
= 1;
1118 fprintf_unfiltered (tmp_error_stream
,
1119 "Could not insert hardware watchpoint %d.\n",
1120 bpt
->owner
->number
);
1126 printf_filtered (_("\
1127 Hardware watchpoint %d deleted because the program has left the block \n\
1128 in which its expression is valid.\n"),
1129 bpt
->owner
->number
);
1130 if (bpt
->owner
->related_breakpoint
)
1131 bpt
->owner
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1132 bpt
->owner
->disposition
= disp_del_at_next_stop
;
1135 /* Restore the selected frame. */
1136 select_frame (frame_find_by_id (saved_frame_id
));
1141 else if (ep_is_exception_catchpoint (bpt
->owner
))
1143 /* FIXME drow/2003-09-09: This code sets both a catchpoint and a
1144 breakpoint. Once again, it would be better if this was represented
1145 as two bp_locations. */
1147 /* If we get here, we must have a callback mechanism for exception
1148 events -- with g++ style embedded label support, we insert
1149 ordinary breakpoints and not catchpoints. */
1150 val
= target_insert_breakpoint (&bpt
->target_info
);
1153 /* Couldn't set breakpoint for some reason */
1154 fprintf_unfiltered (tmp_error_stream
,
1155 "Cannot insert catchpoint %d; disabling it.\n",
1156 bpt
->owner
->number
);
1157 fprintf_filtered (tmp_error_stream
,
1158 "Error accessing memory address ");
1159 deprecated_print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
1160 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1161 safe_strerror (val
));
1162 bpt
->owner
->enable_state
= bp_disabled
;
1166 /* Bp set, now make sure callbacks are enabled */
1167 /* Format possible error msg */
1168 char *message
= xstrprintf ("Error inserting catchpoint %d:\n",
1169 bpt
->owner
->number
);
1170 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
1172 args_for_catchpoint_enable args
;
1173 args
.kind
= bpt
->owner
->type
== bp_catch_catch
?
1174 EX_EVENT_CATCH
: EX_EVENT_THROW
;
1176 val
= catch_errors (cover_target_enable_exception_callback
,
1177 &args
, message
, RETURN_MASK_ALL
);
1178 do_cleanups (cleanups
);
1179 if (val
!= 0 && val
!= -1)
1182 /* Check if something went wrong; val == 0 can be ignored */
1185 /* something went wrong */
1186 fprintf_unfiltered (tmp_error_stream
,
1187 "Cannot insert catchpoint %d; disabling it.\n",
1188 bpt
->owner
->number
);
1189 bpt
->owner
->enable_state
= bp_disabled
;
1196 else if (bpt
->owner
->type
== bp_catch_fork
1197 || bpt
->owner
->type
== bp_catch_vfork
1198 || bpt
->owner
->type
== bp_catch_exec
)
1200 struct gdb_exception e
= catch_exception (uiout
, insert_catchpoint
,
1201 bpt
->owner
, RETURN_MASK_ERROR
);
1202 exception_fprintf (gdb_stderr
, e
, "warning: inserting catchpoint %d: ",
1203 bpt
->owner
->number
);
1205 bpt
->owner
->enable_state
= bp_disabled
;
1209 /* We've already printed an error message if there was a problem
1210 inserting this catchpoint, and we've disabled the catchpoint,
1211 so just return success. */
1218 /* insert_breakpoints is used when starting or continuing the program.
1219 remove_breakpoints is used when the program stops.
1220 Both return zero if successful,
1221 or an `errno' value if could not write the inferior. */
1224 insert_breakpoints (void)
1226 struct bp_location
*b
, *temp
;
1227 int return_val
= 0; /* return success code. */
1229 int disabled_breaks
= 0;
1230 int hw_breakpoint_error
= 0;
1231 int process_warning
= 0;
1233 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1234 make_cleanup_ui_file_delete (tmp_error_stream
);
1236 /* Explicitly mark the warning -- this will only be printed if
1237 there was an error. */
1238 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1240 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1242 /* Permanent breakpoints cannot be inserted or removed. Disabled
1243 breakpoints should not be inserted. */
1244 if (!breakpoint_enabled (b
->owner
))
1247 /* There is no point inserting thread-specific breakpoints if the
1248 thread no longer exists. */
1249 if (b
->owner
->thread
!= -1
1250 && !valid_thread_id (b
->owner
->thread
))
1253 /* FIXME drow/2003-10-07: This code should be pushed elsewhere when
1254 hardware watchpoints are split into multiple loc breakpoints. */
1255 if ((b
->loc_type
== bp_loc_hardware_watchpoint
1256 || b
->owner
->type
== bp_watchpoint
) && !b
->owner
->val
)
1259 val
= evaluate_expression (b
->owner
->exp
);
1260 release_value (val
);
1261 if (value_lazy (val
))
1262 value_fetch_lazy (val
);
1263 b
->owner
->val
= val
;
1266 val
= insert_bp_location (b
, tmp_error_stream
,
1267 &disabled_breaks
, &process_warning
,
1268 &hw_breakpoint_error
);
1275 /* If a hardware breakpoint or watchpoint was inserted, add a
1276 message about possibly exhausted resources. */
1277 if (hw_breakpoint_error
)
1279 fprintf_unfiltered (tmp_error_stream
,
1280 "Could not insert hardware breakpoints:\n\
1281 You may have requested too many hardware breakpoints/watchpoints.\n");
1283 #ifdef ONE_PROCESS_WRITETEXT
1284 if (process_warning
)
1285 fprintf_unfiltered (tmp_error_stream
,
1286 "The same program may be running in another process.");
1288 target_terminal_ours_for_output ();
1289 error_stream (tmp_error_stream
);
1295 remove_breakpoints (void)
1297 struct bp_location
*b
;
1300 ALL_BP_LOCATIONS (b
)
1304 val
= remove_breakpoint (b
, mark_uninserted
);
1313 remove_hw_watchpoints (void)
1315 struct bp_location
*b
;
1318 ALL_BP_LOCATIONS (b
)
1320 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1322 val
= remove_breakpoint (b
, mark_uninserted
);
1331 reattach_breakpoints (int pid
)
1333 struct bp_location
*b
;
1335 struct cleanup
*old_chain
= save_inferior_ptid ();
1336 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1337 int dummy1
= 0, dummy2
= 0, dummy3
= 0;
1339 make_cleanup_ui_file_delete (tmp_error_stream
);
1341 inferior_ptid
= pid_to_ptid (pid
);
1342 ALL_BP_LOCATIONS (b
)
1347 val
= insert_bp_location (b
, tmp_error_stream
,
1348 &dummy1
, &dummy2
, &dummy3
);
1351 do_cleanups (old_chain
);
1356 do_cleanups (old_chain
);
1361 update_breakpoints_after_exec (void)
1363 struct breakpoint
*b
;
1364 struct breakpoint
*temp
;
1366 /* Doing this first prevents the badness of having delete_breakpoint()
1367 write a breakpoint's current "shadow contents" to lift the bp. That
1368 shadow is NOT valid after an exec()! */
1369 mark_breakpoints_out ();
1371 ALL_BREAKPOINTS_SAFE (b
, temp
)
1373 /* Solib breakpoints must be explicitly reset after an exec(). */
1374 if (b
->type
== bp_shlib_event
)
1376 delete_breakpoint (b
);
1380 /* Thread event breakpoints must be set anew after an exec(),
1381 as must overlay event breakpoints. */
1382 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1384 delete_breakpoint (b
);
1388 /* Step-resume breakpoints are meaningless after an exec(). */
1389 if (b
->type
== bp_step_resume
)
1391 delete_breakpoint (b
);
1395 /* Ditto the exception-handling catchpoints. */
1396 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1398 delete_breakpoint (b
);
1402 /* Don't delete an exec catchpoint, because else the inferior
1403 won't stop when it ought!
1405 Similarly, we probably ought to keep vfork catchpoints, 'cause
1406 on this target, we may not be able to stop when the vfork is
1407 seen, but only when the subsequent exec is seen. (And because
1408 deleting fork catchpoints here but not vfork catchpoints will
1409 seem mysterious to users, keep those too.) */
1410 if ((b
->type
== bp_catch_exec
) ||
1411 (b
->type
== bp_catch_vfork
) ||
1412 (b
->type
== bp_catch_fork
))
1417 /* bp_finish is a special case. The only way we ought to be able
1418 to see one of these when an exec() has happened, is if the user
1419 caught a vfork, and then said "finish". Ordinarily a finish just
1420 carries them to the call-site of the current callee, by setting
1421 a temporary bp there and resuming. But in this case, the finish
1422 will carry them entirely through the vfork & exec.
1424 We don't want to allow a bp_finish to remain inserted now. But
1425 we can't safely delete it, 'cause finish_command has a handle to
1426 the bp on a bpstat, and will later want to delete it. There's a
1427 chance (and I've seen it happen) that if we delete the bp_finish
1428 here, that its storage will get reused by the time finish_command
1429 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1430 We really must allow finish_command to delete a bp_finish.
1432 In the absense of a general solution for the "how do we know
1433 it's safe to delete something others may have handles to?"
1434 problem, what we'll do here is just uninsert the bp_finish, and
1435 let finish_command delete it.
1437 (We know the bp_finish is "doomed" in the sense that it's
1438 momentary, and will be deleted as soon as finish_command sees
1439 the inferior stopped. So it doesn't matter that the bp's
1440 address is probably bogus in the new a.out, unlike e.g., the
1441 solib breakpoints.) */
1443 if (b
->type
== bp_finish
)
1448 /* Without a symbolic address, we have little hope of the
1449 pre-exec() address meaning the same thing in the post-exec()
1451 if (b
->addr_string
== NULL
)
1453 delete_breakpoint (b
);
1457 /* FIXME what about longjmp breakpoints? Re-create them here? */
1458 create_overlay_event_breakpoint ("_ovly_debug_event");
1462 detach_breakpoints (int pid
)
1464 struct bp_location
*b
;
1466 struct cleanup
*old_chain
= save_inferior_ptid ();
1468 if (pid
== PIDGET (inferior_ptid
))
1469 error (_("Cannot detach breakpoints of inferior_ptid"));
1471 /* Set inferior_ptid; remove_breakpoint uses this global. */
1472 inferior_ptid
= pid_to_ptid (pid
);
1473 ALL_BP_LOCATIONS (b
)
1477 val
= remove_breakpoint (b
, mark_inserted
);
1480 do_cleanups (old_chain
);
1485 do_cleanups (old_chain
);
1490 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1494 if (b
->owner
->enable_state
== bp_permanent
)
1495 /* Permanent breakpoints cannot be inserted or removed. */
1498 if (b
->owner
->type
== bp_none
)
1499 warning (_("attempted to remove apparently deleted breakpoint #%d?"),
1502 if (b
->loc_type
== bp_loc_software_breakpoint
1503 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1505 /* "Normal" instruction breakpoint: either the standard
1506 trap-instruction bp (bp_breakpoint), or a
1507 bp_hardware_breakpoint. */
1509 /* First check to see if we have to handle an overlay. */
1510 if (overlay_debugging
== ovly_off
1511 || b
->section
== NULL
1512 || !(section_is_overlay (b
->section
)))
1514 /* No overlay handling: just remove the breakpoint. */
1516 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1517 val
= target_remove_hw_breakpoint (&b
->target_info
);
1519 val
= target_remove_breakpoint (&b
->target_info
);
1523 /* This breakpoint is in an overlay section.
1524 Did we set a breakpoint at the LMA? */
1525 if (!overlay_events_enabled
)
1527 /* Yes -- overlay event support is not active, so we
1528 should have set a breakpoint at the LMA. Remove it.
1530 /* Ignore any failures: if the LMA is in ROM, we will
1531 have already warned when we failed to insert it. */
1532 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1533 target_remove_hw_breakpoint (&b
->overlay_target_info
);
1535 target_remove_breakpoint (&b
->overlay_target_info
);
1537 /* Did we set a breakpoint at the VMA?
1538 If so, we will have marked the breakpoint 'inserted'. */
1541 /* Yes -- remove it. Previously we did not bother to
1542 remove the breakpoint if the section had been
1543 unmapped, but let's not rely on that being safe. We
1544 don't know what the overlay manager might do. */
1545 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1546 val
= target_remove_hw_breakpoint (&b
->target_info
);
1548 /* However, we should remove *software* breakpoints only
1549 if the section is still mapped, or else we overwrite
1550 wrong code with the saved shadow contents. */
1551 else if (section_is_mapped (b
->section
))
1552 val
= target_remove_breakpoint (&b
->target_info
);
1558 /* No -- not inserted, so no need to remove. No error. */
1564 b
->inserted
= (is
== mark_inserted
);
1566 else if (b
->loc_type
== bp_loc_hardware_watchpoint
1567 && breakpoint_enabled (b
->owner
)
1573 b
->inserted
= (is
== mark_inserted
);
1574 /* Walk down the saved value chain. */
1575 for (v
= b
->owner
->val_chain
; v
; v
= value_next (v
))
1577 /* For each memory reference remove the watchpoint
1579 if (VALUE_LVAL (v
) == lval_memory
1580 && ! value_lazy (v
))
1582 struct type
*vtype
= check_typedef (value_type (v
));
1584 if (v
== b
->owner
->val_chain
1585 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1586 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1591 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
1592 len
= TYPE_LENGTH (value_type (v
));
1594 if (b
->owner
->type
== bp_read_watchpoint
)
1596 else if (b
->owner
->type
== bp_access_watchpoint
)
1599 val
= target_remove_watchpoint (addr
, len
, type
);
1606 /* Failure to remove any of the hardware watchpoints comes here. */
1607 if ((is
== mark_uninserted
) && (b
->inserted
))
1608 warning (_("Could not remove hardware watchpoint %d."),
1611 else if ((b
->owner
->type
== bp_catch_fork
||
1612 b
->owner
->type
== bp_catch_vfork
||
1613 b
->owner
->type
== bp_catch_exec
)
1614 && breakpoint_enabled (b
->owner
)
1618 switch (b
->owner
->type
)
1621 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1623 case bp_catch_vfork
:
1624 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1627 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1630 warning (_("Internal error, %s line %d."), __FILE__
, __LINE__
);
1635 b
->inserted
= (is
== mark_inserted
);
1637 else if ((b
->owner
->type
== bp_catch_catch
||
1638 b
->owner
->type
== bp_catch_throw
)
1639 && breakpoint_enabled (b
->owner
)
1642 val
= target_remove_breakpoint (&b
->target_info
);
1645 b
->inserted
= (is
== mark_inserted
);
1651 /* Clear the "inserted" flag in all breakpoints. */
1654 mark_breakpoints_out (void)
1656 struct bp_location
*bpt
;
1658 ALL_BP_LOCATIONS (bpt
)
1662 /* Clear the "inserted" flag in all breakpoints and delete any
1663 breakpoints which should go away between runs of the program.
1665 Plus other such housekeeping that has to be done for breakpoints
1668 Note: this function gets called at the end of a run (by
1669 generic_mourn_inferior) and when a run begins (by
1670 init_wait_for_inferior). */
1675 breakpoint_init_inferior (enum inf_context context
)
1677 struct breakpoint
*b
, *temp
;
1678 struct bp_location
*bpt
;
1680 ALL_BP_LOCATIONS (bpt
)
1683 ALL_BREAKPOINTS_SAFE (b
, temp
)
1688 case bp_watchpoint_scope
:
1690 /* If the call dummy breakpoint is at the entry point it will
1691 cause problems when the inferior is rerun, so we better
1694 Also get rid of scope breakpoints. */
1695 delete_breakpoint (b
);
1699 case bp_hardware_watchpoint
:
1700 case bp_read_watchpoint
:
1701 case bp_access_watchpoint
:
1703 /* Likewise for watchpoints on local expressions. */
1704 if (b
->exp_valid_block
!= NULL
)
1705 delete_breakpoint (b
);
1706 else if (context
== inf_starting
)
1708 /* Reset val field to force reread of starting value
1709 in insert_breakpoints. */
1711 value_free (b
->val
);
1721 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1722 exists at PC. It returns ordinary_breakpoint_here if it's an
1723 ordinary breakpoint, or permanent_breakpoint_here if it's a
1724 permanent breakpoint.
1725 - When continuing from a location with an ordinary breakpoint, we
1726 actually single step once before calling insert_breakpoints.
1727 - When continuing from a localion with a permanent breakpoint, we
1728 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1729 the target, to advance the PC past the breakpoint. */
1731 enum breakpoint_here
1732 breakpoint_here_p (CORE_ADDR pc
)
1734 struct bp_location
*bpt
;
1735 int any_breakpoint_here
= 0;
1737 ALL_BP_LOCATIONS (bpt
)
1739 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1740 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1743 if ((breakpoint_enabled (bpt
->owner
)
1744 || bpt
->owner
->enable_state
== bp_permanent
)
1745 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1747 if (overlay_debugging
1748 && section_is_overlay (bpt
->section
)
1749 && !section_is_mapped (bpt
->section
))
1750 continue; /* unmapped overlay -- can't be a match */
1751 else if (bpt
->owner
->enable_state
== bp_permanent
)
1752 return permanent_breakpoint_here
;
1754 any_breakpoint_here
= 1;
1758 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1762 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1763 but it only returns true if there is actually a breakpoint inserted
1767 breakpoint_inserted_here_p (CORE_ADDR pc
)
1769 struct bp_location
*bpt
;
1771 ALL_BP_LOCATIONS (bpt
)
1773 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1774 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1778 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1780 if (overlay_debugging
1781 && section_is_overlay (bpt
->section
)
1782 && !section_is_mapped (bpt
->section
))
1783 continue; /* unmapped overlay -- can't be a match */
1789 /* Also check for software single-step breakpoints. */
1790 if (single_step_breakpoint_inserted_here_p (pc
))
1796 /* This function returns non-zero iff there is a software breakpoint
1800 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1802 struct bp_location
*bpt
;
1803 int any_breakpoint_here
= 0;
1805 ALL_BP_LOCATIONS (bpt
)
1807 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1810 if ((breakpoint_enabled (bpt
->owner
)
1811 || bpt
->owner
->enable_state
== bp_permanent
)
1813 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1815 if (overlay_debugging
1816 && section_is_overlay (bpt
->section
)
1817 && !section_is_mapped (bpt
->section
))
1818 continue; /* unmapped overlay -- can't be a match */
1824 /* Also check for software single-step breakpoints. */
1825 if (single_step_breakpoint_inserted_here_p (pc
))
1831 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1832 PC is valid for process/thread PTID. */
1835 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1837 struct bp_location
*bpt
;
1840 thread
= pid_to_thread_id (ptid
);
1842 ALL_BP_LOCATIONS (bpt
)
1844 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1845 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1848 if ((breakpoint_enabled (bpt
->owner
)
1849 || bpt
->owner
->enable_state
== bp_permanent
)
1850 && bpt
->address
== pc
1851 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1853 if (overlay_debugging
1854 && section_is_overlay (bpt
->section
)
1855 && !section_is_mapped (bpt
->section
))
1856 continue; /* unmapped overlay -- can't be a match */
1866 /* bpstat stuff. External routines' interfaces are documented
1870 ep_is_catchpoint (struct breakpoint
*ep
)
1873 (ep
->type
== bp_catch_load
)
1874 || (ep
->type
== bp_catch_unload
)
1875 || (ep
->type
== bp_catch_fork
)
1876 || (ep
->type
== bp_catch_vfork
)
1877 || (ep
->type
== bp_catch_exec
)
1878 || (ep
->type
== bp_catch_catch
)
1879 || (ep
->type
== bp_catch_throw
);
1881 /* ??rehrauer: Add more kinds here, as are implemented... */
1885 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1888 (ep
->type
== bp_catch_load
)
1889 || (ep
->type
== bp_catch_unload
);
1893 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1896 (ep
->type
== bp_catch_catch
)
1897 || (ep
->type
== bp_catch_throw
);
1901 bpstat_free (bpstat bs
)
1903 if (bs
->old_val
!= NULL
)
1904 value_free (bs
->old_val
);
1905 free_command_lines (&bs
->commands
);
1909 /* Clear a bpstat so that it says we are not at any breakpoint.
1910 Also free any storage that is part of a bpstat. */
1913 bpstat_clear (bpstat
*bsp
)
1930 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1931 is part of the bpstat is copied as well. */
1934 bpstat_copy (bpstat bs
)
1938 bpstat retval
= NULL
;
1943 for (; bs
!= NULL
; bs
= bs
->next
)
1945 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1946 memcpy (tmp
, bs
, sizeof (*tmp
));
1947 if (bs
->commands
!= NULL
)
1948 tmp
->commands
= copy_command_lines (bs
->commands
);
1949 if (bs
->old_val
!= NULL
)
1950 tmp
->old_val
= value_copy (bs
->old_val
);
1953 /* This is the first thing in the chain. */
1963 /* Find the bpstat associated with this breakpoint */
1966 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1971 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1973 if (bsp
->breakpoint_at
== breakpoint
)
1979 /* Find a step_resume breakpoint associated with this bpstat.
1980 (If there are multiple step_resume bp's on the list, this function
1981 will arbitrarily pick one.)
1983 It is an error to use this function if BPSTAT doesn't contain a
1984 step_resume breakpoint.
1986 See wait_for_inferior's use of this function. */
1988 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1992 gdb_assert (bsp
!= NULL
);
1994 current_thread
= pid_to_thread_id (inferior_ptid
);
1996 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1998 if ((bsp
->breakpoint_at
!= NULL
) &&
1999 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
2000 (bsp
->breakpoint_at
->thread
== current_thread
||
2001 bsp
->breakpoint_at
->thread
== -1))
2002 return bsp
->breakpoint_at
;
2005 internal_error (__FILE__
, __LINE__
, _("No step_resume breakpoint found."));
2009 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
2010 at. *BSP upon return is a bpstat which points to the remaining
2011 breakpoints stopped at (but which is not guaranteed to be good for
2012 anything but further calls to bpstat_num).
2013 Return 0 if passed a bpstat which does not indicate any breakpoints.
2014 Return -1 if stopped at a breakpoint that has been deleted since
2016 Return 1 otherwise. */
2019 bpstat_num (bpstat
*bsp
, int *num
)
2021 struct breakpoint
*b
;
2024 return 0; /* No more breakpoint values */
2026 b
= (*bsp
)->breakpoint_at
;
2027 *bsp
= (*bsp
)->next
;
2029 return -1; /* breakpoint that's been deleted since */
2031 *num
= b
->number
; /* We have its number */
2035 /* Modify BS so that the actions will not be performed. */
2038 bpstat_clear_actions (bpstat bs
)
2040 for (; bs
!= NULL
; bs
= bs
->next
)
2042 free_command_lines (&bs
->commands
);
2043 if (bs
->old_val
!= NULL
)
2045 value_free (bs
->old_val
);
2051 /* Stub for cleaning up our state if we error-out of a breakpoint command */
2053 cleanup_executing_breakpoints (void *ignore
)
2055 executing_breakpoint_commands
= 0;
2058 /* Execute all the commands associated with all the breakpoints at this
2059 location. Any of these commands could cause the process to proceed
2060 beyond this point, etc. We look out for such changes by checking
2061 the global "breakpoint_proceeded" after each command. */
2064 bpstat_do_actions (bpstat
*bsp
)
2067 struct cleanup
*old_chain
;
2069 /* Avoid endless recursion if a `source' command is contained
2071 if (executing_breakpoint_commands
)
2074 executing_breakpoint_commands
= 1;
2075 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2078 /* Note that (as of this writing), our callers all appear to
2079 be passing us the address of global stop_bpstat. And, if
2080 our calls to execute_control_command cause the inferior to
2081 proceed, that global (and hence, *bsp) will change.
2083 We must be careful to not touch *bsp unless the inferior
2084 has not proceeded. */
2086 /* This pointer will iterate over the list of bpstat's. */
2089 breakpoint_proceeded
= 0;
2090 for (; bs
!= NULL
; bs
= bs
->next
)
2092 struct command_line
*cmd
;
2093 struct cleanup
*this_cmd_tree_chain
;
2095 /* Take ownership of the BSP's command tree, if it has one.
2097 The command tree could legitimately contain commands like
2098 'step' and 'next', which call clear_proceed_status, which
2099 frees stop_bpstat's command tree. To make sure this doesn't
2100 free the tree we're executing out from under us, we need to
2101 take ownership of the tree ourselves. Since a given bpstat's
2102 commands are only executed once, we don't need to copy it; we
2103 can clear the pointer in the bpstat, and make sure we free
2104 the tree when we're done. */
2107 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2111 execute_control_command (cmd
);
2113 if (breakpoint_proceeded
)
2119 /* We can free this command tree now. */
2120 do_cleanups (this_cmd_tree_chain
);
2122 if (breakpoint_proceeded
)
2123 /* The inferior is proceeded by the command; bomb out now.
2124 The bpstat chain has been blown away by wait_for_inferior.
2125 But since execution has stopped again, there is a new bpstat
2126 to look at, so start over. */
2129 do_cleanups (old_chain
);
2132 /* This is the normal print function for a bpstat. In the future,
2133 much of this logic could (should?) be moved to bpstat_stop_status,
2134 by having it set different print_it values.
2136 Current scheme: When we stop, bpstat_print() is called. It loops
2137 through the bpstat list of things causing this stop, calling the
2138 print_bp_stop_message function on each one. The behavior of the
2139 print_bp_stop_message function depends on the print_it field of
2140 bpstat. If such field so indicates, call this function here.
2142 Return values from this routine (ultimately used by bpstat_print()
2143 and normal_stop() to decide what to do):
2144 PRINT_NOTHING: Means we already printed all we needed to print,
2145 don't print anything else.
2146 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2147 that something to be followed by a location.
2148 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2149 that something to be followed by a location.
2150 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2153 static enum print_stop_action
2154 print_it_typical (bpstat bs
)
2156 struct cleanup
*old_chain
, *ui_out_chain
;
2157 struct ui_stream
*stb
;
2158 stb
= ui_out_stream_new (uiout
);
2159 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2160 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2161 which has since been deleted. */
2162 if (bs
->breakpoint_at
== NULL
)
2163 return PRINT_UNKNOWN
;
2165 switch (bs
->breakpoint_at
->type
)
2168 case bp_hardware_breakpoint
:
2169 if (bs
->breakpoint_at
->loc
->address
!= bs
->breakpoint_at
->loc
->requested_address
)
2170 breakpoint_adjustment_warning (bs
->breakpoint_at
->loc
->requested_address
,
2171 bs
->breakpoint_at
->loc
->address
,
2172 bs
->breakpoint_at
->number
, 1);
2173 annotate_breakpoint (bs
->breakpoint_at
->number
);
2174 ui_out_text (uiout
, "\nBreakpoint ");
2175 if (ui_out_is_mi_like_p (uiout
))
2176 ui_out_field_string (uiout
, "reason",
2177 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
2178 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2179 ui_out_text (uiout
, ", ");
2180 return PRINT_SRC_AND_LOC
;
2183 case bp_shlib_event
:
2184 /* Did we stop because the user set the stop_on_solib_events
2185 variable? (If so, we report this as a generic, "Stopped due
2186 to shlib event" message.) */
2187 printf_filtered (_("Stopped due to shared library event\n"));
2188 return PRINT_NOTHING
;
2191 case bp_thread_event
:
2192 /* Not sure how we will get here.
2193 GDB should not stop for these breakpoints. */
2194 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
2195 return PRINT_NOTHING
;
2198 case bp_overlay_event
:
2199 /* By analogy with the thread event, GDB should not stop for these. */
2200 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
2201 return PRINT_NOTHING
;
2205 annotate_catchpoint (bs
->breakpoint_at
->number
);
2206 printf_filtered (_("\nCatchpoint %d (loaded %s), "),
2207 bs
->breakpoint_at
->number
,
2208 bs
->breakpoint_at
->triggered_dll_pathname
);
2209 return PRINT_SRC_AND_LOC
;
2212 case bp_catch_unload
:
2213 annotate_catchpoint (bs
->breakpoint_at
->number
);
2214 printf_filtered (_("\nCatchpoint %d (unloaded %s), "),
2215 bs
->breakpoint_at
->number
,
2216 bs
->breakpoint_at
->triggered_dll_pathname
);
2217 return PRINT_SRC_AND_LOC
;
2221 annotate_catchpoint (bs
->breakpoint_at
->number
);
2222 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
2223 bs
->breakpoint_at
->number
,
2224 bs
->breakpoint_at
->forked_inferior_pid
);
2225 return PRINT_SRC_AND_LOC
;
2228 case bp_catch_vfork
:
2229 annotate_catchpoint (bs
->breakpoint_at
->number
);
2230 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
2231 bs
->breakpoint_at
->number
,
2232 bs
->breakpoint_at
->forked_inferior_pid
);
2233 return PRINT_SRC_AND_LOC
;
2237 annotate_catchpoint (bs
->breakpoint_at
->number
);
2238 printf_filtered (_("\nCatchpoint %d (exec'd %s), "),
2239 bs
->breakpoint_at
->number
,
2240 bs
->breakpoint_at
->exec_pathname
);
2241 return PRINT_SRC_AND_LOC
;
2244 case bp_catch_catch
:
2245 if (current_exception_event
&&
2246 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2248 annotate_catchpoint (bs
->breakpoint_at
->number
);
2249 printf_filtered (_("\nCatchpoint %d (exception caught), "),
2250 bs
->breakpoint_at
->number
);
2251 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2252 printf_filtered (_("throw location %s:%d, "),
2253 CURRENT_EXCEPTION_THROW_FILE
,
2254 CURRENT_EXCEPTION_THROW_LINE
);
2256 printf_filtered (_("throw location unknown, "));
2258 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2259 printf_filtered (_("catch location %s:%d\n"),
2260 CURRENT_EXCEPTION_CATCH_FILE
,
2261 CURRENT_EXCEPTION_CATCH_LINE
);
2263 printf_filtered (_("catch location unknown\n"));
2265 /* don't bother to print location frame info */
2266 return PRINT_SRC_ONLY
;
2270 /* really throw, some other bpstat will handle it */
2271 return PRINT_UNKNOWN
;
2275 case bp_catch_throw
:
2276 if (current_exception_event
&&
2277 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2279 annotate_catchpoint (bs
->breakpoint_at
->number
);
2280 printf_filtered (_("\nCatchpoint %d (exception thrown), "),
2281 bs
->breakpoint_at
->number
);
2282 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2283 printf_filtered (_("throw location %s:%d, "),
2284 CURRENT_EXCEPTION_THROW_FILE
,
2285 CURRENT_EXCEPTION_THROW_LINE
);
2287 printf_filtered (_("throw location unknown, "));
2289 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2290 printf_filtered (_("catch location %s:%d\n"),
2291 CURRENT_EXCEPTION_CATCH_FILE
,
2292 CURRENT_EXCEPTION_CATCH_LINE
);
2294 printf_filtered (_("catch location unknown\n"));
2296 /* don't bother to print location frame info */
2297 return PRINT_SRC_ONLY
;
2301 /* really catch, some other bpstat will handle it */
2302 return PRINT_UNKNOWN
;
2307 case bp_hardware_watchpoint
:
2308 if (bs
->old_val
!= NULL
)
2310 annotate_watchpoint (bs
->breakpoint_at
->number
);
2311 if (ui_out_is_mi_like_p (uiout
))
2314 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
2315 mention (bs
->breakpoint_at
);
2316 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2317 ui_out_text (uiout
, "\nOld value = ");
2318 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2319 ui_out_field_stream (uiout
, "old", stb
);
2320 ui_out_text (uiout
, "\nNew value = ");
2321 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2322 ui_out_field_stream (uiout
, "new", stb
);
2323 do_cleanups (ui_out_chain
);
2324 ui_out_text (uiout
, "\n");
2325 value_free (bs
->old_val
);
2328 /* More than one watchpoint may have been triggered. */
2329 return PRINT_UNKNOWN
;
2332 case bp_read_watchpoint
:
2333 if (ui_out_is_mi_like_p (uiout
))
2336 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
2337 mention (bs
->breakpoint_at
);
2338 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2339 ui_out_text (uiout
, "\nValue = ");
2340 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2341 ui_out_field_stream (uiout
, "value", stb
);
2342 do_cleanups (ui_out_chain
);
2343 ui_out_text (uiout
, "\n");
2344 return PRINT_UNKNOWN
;
2347 case bp_access_watchpoint
:
2348 if (bs
->old_val
!= NULL
)
2350 annotate_watchpoint (bs
->breakpoint_at
->number
);
2351 if (ui_out_is_mi_like_p (uiout
))
2354 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2355 mention (bs
->breakpoint_at
);
2356 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2357 ui_out_text (uiout
, "\nOld value = ");
2358 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2359 ui_out_field_stream (uiout
, "old", stb
);
2360 value_free (bs
->old_val
);
2362 ui_out_text (uiout
, "\nNew value = ");
2366 mention (bs
->breakpoint_at
);
2367 if (ui_out_is_mi_like_p (uiout
))
2370 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2371 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2372 ui_out_text (uiout
, "\nValue = ");
2374 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2375 ui_out_field_stream (uiout
, "new", stb
);
2376 do_cleanups (ui_out_chain
);
2377 ui_out_text (uiout
, "\n");
2378 return PRINT_UNKNOWN
;
2381 /* Fall through, we don't deal with these types of breakpoints
2385 if (ui_out_is_mi_like_p (uiout
))
2388 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED
));
2389 return PRINT_UNKNOWN
;
2393 if (ui_out_is_mi_like_p (uiout
))
2396 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED
));
2397 return PRINT_UNKNOWN
;
2402 case bp_longjmp_resume
:
2403 case bp_step_resume
:
2404 case bp_watchpoint_scope
:
2407 return PRINT_UNKNOWN
;
2411 /* Generic routine for printing messages indicating why we
2412 stopped. The behavior of this function depends on the value
2413 'print_it' in the bpstat structure. Under some circumstances we
2414 may decide not to print anything here and delegate the task to
2417 static enum print_stop_action
2418 print_bp_stop_message (bpstat bs
)
2420 switch (bs
->print_it
)
2423 /* Nothing should be printed for this bpstat entry. */
2424 return PRINT_UNKNOWN
;
2428 /* We still want to print the frame, but we already printed the
2429 relevant messages. */
2430 return PRINT_SRC_AND_LOC
;
2433 case print_it_normal
:
2434 /* Normal case. Call the breakpoint's print_it method, or
2435 print_it_typical. */
2436 if (bs
->breakpoint_at
!= NULL
&& bs
->breakpoint_at
->ops
!= NULL
2437 && bs
->breakpoint_at
->ops
->print_it
!= NULL
)
2438 return bs
->breakpoint_at
->ops
->print_it (bs
->breakpoint_at
);
2440 return print_it_typical (bs
);
2444 internal_error (__FILE__
, __LINE__
,
2445 _("print_bp_stop_message: unrecognized enum value"));
2450 /* Print a message indicating what happened. This is called from
2451 normal_stop(). The input to this routine is the head of the bpstat
2452 list - a list of the eventpoints that caused this stop. This
2453 routine calls the generic print routine for printing a message
2454 about reasons for stopping. This will print (for example) the
2455 "Breakpoint n," part of the output. The return value of this
2458 PRINT_UNKNOWN: Means we printed nothing
2459 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2460 code to print the location. An example is
2461 "Breakpoint 1, " which should be followed by
2463 PRINT_SRC_ONLY: Means we printed something, but there is no need
2464 to also print the location part of the message.
2465 An example is the catch/throw messages, which
2466 don't require a location appended to the end.
2467 PRINT_NOTHING: We have done some printing and we don't need any
2468 further info to be printed.*/
2470 enum print_stop_action
2471 bpstat_print (bpstat bs
)
2475 /* Maybe another breakpoint in the chain caused us to stop.
2476 (Currently all watchpoints go on the bpstat whether hit or not.
2477 That probably could (should) be changed, provided care is taken
2478 with respect to bpstat_explains_signal). */
2479 for (; bs
; bs
= bs
->next
)
2481 val
= print_bp_stop_message (bs
);
2482 if (val
== PRINT_SRC_ONLY
2483 || val
== PRINT_SRC_AND_LOC
2484 || val
== PRINT_NOTHING
)
2488 /* We reached the end of the chain, or we got a null BS to start
2489 with and nothing was printed. */
2490 return PRINT_UNKNOWN
;
2493 /* Evaluate the expression EXP and return 1 if value is zero.
2494 This is used inside a catch_errors to evaluate the breakpoint condition.
2495 The argument is a "struct expression *" that has been cast to char * to
2496 make it pass through catch_errors. */
2499 breakpoint_cond_eval (void *exp
)
2501 struct value
*mark
= value_mark ();
2502 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2503 value_free_to_mark (mark
);
2507 /* Allocate a new bpstat and chain it to the current one. */
2510 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2514 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2516 bs
->breakpoint_at
= b
;
2517 /* If the condition is false, etc., don't do the commands. */
2518 bs
->commands
= NULL
;
2520 bs
->print_it
= print_it_normal
;
2524 /* Possible return values for watchpoint_check (this can't be an enum
2525 because of check_errors). */
2526 /* The watchpoint has been deleted. */
2527 #define WP_DELETED 1
2528 /* The value has changed. */
2529 #define WP_VALUE_CHANGED 2
2530 /* The value has not changed. */
2531 #define WP_VALUE_NOT_CHANGED 3
2533 #define BP_TEMPFLAG 1
2534 #define BP_HARDWAREFLAG 2
2536 /* Check watchpoint condition. */
2539 watchpoint_check (void *p
)
2541 bpstat bs
= (bpstat
) p
;
2542 struct breakpoint
*b
;
2543 struct frame_info
*fr
;
2544 int within_current_scope
;
2546 b
= bs
->breakpoint_at
;
2548 if (b
->exp_valid_block
== NULL
)
2549 within_current_scope
= 1;
2552 /* There is no current frame at this moment. If we're going to have
2553 any chance of handling watchpoints on local variables, we'll need
2554 the frame chain (so we can determine if we're in scope). */
2555 reinit_frame_cache ();
2556 fr
= frame_find_by_id (b
->watchpoint_frame
);
2557 within_current_scope
= (fr
!= NULL
);
2559 /* If we've gotten confused in the unwinder, we might have
2560 returned a frame that can't describe this variable. */
2561 if (within_current_scope
2562 && block_function (b
->exp_valid_block
) != get_frame_function (fr
))
2563 within_current_scope
= 0;
2565 /* in_function_epilogue_p() returns a non-zero value if we're still
2566 in the function but the stack frame has already been invalidated.
2567 Since we can't rely on the values of local variables after the
2568 stack has been destroyed, we are treating the watchpoint in that
2569 state as `not changed' without further checking.
2571 vinschen/2003-09-04: The former implementation left out the case
2572 that the watchpoint frame couldn't be found by frame_find_by_id()
2573 because the current PC is currently in an epilogue. Calling
2574 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2575 if ((!within_current_scope
|| fr
== get_current_frame ())
2576 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2577 return WP_VALUE_NOT_CHANGED
;
2578 if (fr
&& within_current_scope
)
2579 /* If we end up stopping, the current frame will get selected
2580 in normal_stop. So this call to select_frame won't affect
2585 if (within_current_scope
)
2587 /* We use value_{,free_to_}mark because it could be a
2588 *long* time before we return to the command level and
2589 call free_all_values. We can't call free_all_values because
2590 we might be in the middle of evaluating a function call. */
2592 struct value
*mark
= value_mark ();
2593 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2594 if (!value_equal (b
->val
, new_val
))
2596 release_value (new_val
);
2597 value_free_to_mark (mark
);
2598 bs
->old_val
= b
->val
;
2600 /* We will stop here */
2601 return WP_VALUE_CHANGED
;
2605 /* Nothing changed, don't do anything. */
2606 value_free_to_mark (mark
);
2607 /* We won't stop here */
2608 return WP_VALUE_NOT_CHANGED
;
2613 /* This seems like the only logical thing to do because
2614 if we temporarily ignored the watchpoint, then when
2615 we reenter the block in which it is valid it contains
2616 garbage (in the case of a function, it may have two
2617 garbage values, one before and one after the prologue).
2618 So we can't even detect the first assignment to it and
2619 watch after that (since the garbage may or may not equal
2620 the first value assigned). */
2621 /* We print all the stop information in print_it_typical(), but
2622 in this case, by the time we call print_it_typical() this bp
2623 will be deleted already. So we have no choice but print the
2624 information here. */
2625 if (ui_out_is_mi_like_p (uiout
))
2627 (uiout
, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE
));
2628 ui_out_text (uiout
, "\nWatchpoint ");
2629 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2630 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2631 which its expression is valid.\n");
2633 if (b
->related_breakpoint
)
2634 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2635 b
->disposition
= disp_del_at_next_stop
;
2641 /* Get a bpstat associated with having just stopped at address
2642 BP_ADDR in thread PTID. STOPPED_BY_WATCHPOINT is 1 if the
2643 target thinks we stopped due to a hardware watchpoint, 0 if we
2644 know we did not trigger a hardware watchpoint, and -1 if we do not know. */
2646 /* Determine whether we stopped at a breakpoint, etc, or whether we
2647 don't understand this stop. Result is a chain of bpstat's such that:
2649 if we don't understand the stop, the result is a null pointer.
2651 if we understand why we stopped, the result is not null.
2653 Each element of the chain refers to a particular breakpoint or
2654 watchpoint at which we have stopped. (We may have stopped for
2655 several reasons concurrently.)
2657 Each element of the chain has valid next, breakpoint_at,
2658 commands, FIXME??? fields. */
2661 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
, int stopped_by_watchpoint
)
2663 struct breakpoint
*b
, *temp
;
2664 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2665 int real_breakpoint
= 0;
2666 /* Root of the chain of bpstat's */
2667 struct bpstats root_bs
[1];
2668 /* Pointer to the last thing in the chain currently. */
2669 bpstat bs
= root_bs
;
2670 int thread_id
= pid_to_thread_id (ptid
);
2672 ALL_BREAKPOINTS_SAFE (b
, temp
)
2674 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
2677 if (b
->type
!= bp_watchpoint
2678 && b
->type
!= bp_hardware_watchpoint
2679 && b
->type
!= bp_read_watchpoint
2680 && b
->type
!= bp_access_watchpoint
2681 && b
->type
!= bp_hardware_breakpoint
2682 && b
->type
!= bp_catch_fork
2683 && b
->type
!= bp_catch_vfork
2684 && b
->type
!= bp_catch_exec
2685 && b
->type
!= bp_catch_catch
2686 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2688 if (b
->loc
->address
!= bp_addr
) /* address doesn't match */
2690 if (overlay_debugging
/* unmapped overlay section */
2691 && section_is_overlay (b
->loc
->section
)
2692 && !section_is_mapped (b
->loc
->section
))
2696 /* Continuable hardware watchpoints are treated as non-existent if the
2697 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2698 some data address). Otherwise gdb won't stop on a break instruction
2699 in the code (not from a breakpoint) when a hardware watchpoint has
2702 if ((b
->type
== bp_hardware_watchpoint
2703 || b
->type
== bp_read_watchpoint
2704 || b
->type
== bp_access_watchpoint
)
2705 && !stopped_by_watchpoint
)
2708 if (b
->type
== bp_hardware_breakpoint
)
2710 if (b
->loc
->address
!= bp_addr
)
2712 if (overlay_debugging
/* unmapped overlay section */
2713 && section_is_overlay (b
->loc
->section
)
2714 && !section_is_mapped (b
->loc
->section
))
2718 /* Is this a catchpoint of a load or unload? If so, did we
2719 get a load or unload of the specified library? If not,
2721 if ((b
->type
== bp_catch_load
)
2722 #if defined(SOLIB_HAVE_LOAD_EVENT)
2723 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2724 || ((b
->dll_pathname
!= NULL
)
2725 && (strcmp (b
->dll_pathname
,
2726 SOLIB_LOADED_LIBRARY_PATHNAME (
2727 PIDGET (inferior_ptid
)))
2733 if ((b
->type
== bp_catch_unload
)
2734 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2735 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2736 || ((b
->dll_pathname
!= NULL
)
2737 && (strcmp (b
->dll_pathname
,
2738 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2739 PIDGET (inferior_ptid
)))
2745 if ((b
->type
== bp_catch_fork
)
2746 && !inferior_has_forked (PIDGET (inferior_ptid
),
2747 &b
->forked_inferior_pid
))
2750 if ((b
->type
== bp_catch_vfork
)
2751 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2752 &b
->forked_inferior_pid
))
2755 if ((b
->type
== bp_catch_exec
)
2756 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2759 if (ep_is_exception_catchpoint (b
) &&
2760 !(current_exception_event
= target_get_current_exception_event ()))
2763 /* Come here if it's a watchpoint, or if the break address matches */
2765 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2767 /* Watchpoints may change this, if not found to have triggered. */
2771 if (b
->type
== bp_watchpoint
||
2772 b
->type
== bp_hardware_watchpoint
)
2774 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2776 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2777 int e
= catch_errors (watchpoint_check
, bs
, message
,
2779 do_cleanups (cleanups
);
2783 /* We've already printed what needs to be printed. */
2784 /* Actually this is superfluous, because by the time we
2785 call print_it_typical() the wp will be already deleted,
2786 and the function will return immediately. */
2787 bs
->print_it
= print_it_done
;
2790 case WP_VALUE_CHANGED
:
2794 case WP_VALUE_NOT_CHANGED
:
2796 bs
->print_it
= print_it_noop
;
2803 /* Error from catch_errors. */
2804 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2805 if (b
->related_breakpoint
)
2806 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2807 b
->disposition
= disp_del_at_next_stop
;
2808 /* We've already printed what needs to be printed. */
2809 bs
->print_it
= print_it_done
;
2815 else if (b
->type
== bp_read_watchpoint
||
2816 b
->type
== bp_access_watchpoint
)
2822 if (!target_stopped_data_address (¤t_target
, &addr
))
2824 for (v
= b
->val_chain
; v
; v
= value_next (v
))
2826 if (VALUE_LVAL (v
) == lval_memory
2827 && ! value_lazy (v
))
2829 struct type
*vtype
= check_typedef (value_type (v
));
2831 if (v
== b
->val_chain
2832 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2833 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2837 vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
2838 /* Exact match not required. Within range is
2840 if (addr
>= vaddr
&&
2841 addr
< vaddr
+ TYPE_LENGTH (value_type (v
)))
2848 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2850 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2851 int e
= catch_errors (watchpoint_check
, bs
, message
,
2853 do_cleanups (cleanups
);
2857 /* We've already printed what needs to be printed. */
2858 bs
->print_it
= print_it_done
;
2861 case WP_VALUE_CHANGED
:
2862 if (b
->type
== bp_read_watchpoint
)
2864 /* Don't stop: read watchpoints shouldn't fire if
2865 the value has changed. This is for targets
2866 which cannot set read-only watchpoints. */
2867 bs
->print_it
= print_it_noop
;
2873 case WP_VALUE_NOT_CHANGED
:
2880 /* Error from catch_errors. */
2881 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2882 if (b
->related_breakpoint
)
2883 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2884 b
->disposition
= disp_del_at_next_stop
;
2885 /* We've already printed what needs to be printed. */
2886 bs
->print_it
= print_it_done
;
2890 else /* found == 0 */
2892 /* This is a case where some watchpoint(s) triggered,
2893 but not at the address of this watchpoint (FOUND
2894 was left zero). So don't print anything for this
2896 bs
->print_it
= print_it_noop
;
2903 /* By definition, an encountered breakpoint is a triggered
2907 real_breakpoint
= 1;
2910 if (frame_id_p (b
->frame_id
)
2911 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2915 int value_is_zero
= 0;
2919 /* Need to select the frame, with all that implies
2920 so that the conditions will have the right context. */
2921 select_frame (get_current_frame ());
2923 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2924 "Error in testing breakpoint condition:\n",
2926 /* FIXME-someday, should give breakpoint # */
2929 if (b
->cond
&& value_is_zero
)
2932 /* Don't consider this a hit. */
2935 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2938 /* Don't consider this a hit. */
2941 else if (b
->ignore_count
> 0)
2944 annotate_ignore_count_change ();
2949 /* We will stop here */
2950 if (b
->disposition
== disp_disable
)
2951 b
->enable_state
= bp_disabled
;
2954 bs
->commands
= b
->commands
;
2956 (strcmp ("silent", bs
->commands
->line
) == 0
2957 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
2959 bs
->commands
= bs
->commands
->next
;
2962 bs
->commands
= copy_command_lines (bs
->commands
);
2965 /* Print nothing for this entry if we dont stop or if we dont print. */
2966 if (bs
->stop
== 0 || bs
->print
== 0)
2967 bs
->print_it
= print_it_noop
;
2970 bs
->next
= NULL
; /* Terminate the chain */
2971 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2973 /* The value of a hardware watchpoint hasn't changed, but the
2974 intermediate memory locations we are watching may have. */
2975 if (bs
&& !bs
->stop
&&
2976 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2977 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2978 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2980 remove_breakpoints ();
2981 insert_breakpoints ();
2986 /* Tell what to do about this bpstat. */
2988 bpstat_what (bpstat bs
)
2990 /* Classify each bpstat as one of the following. */
2993 /* This bpstat element has no effect on the main_action. */
2996 /* There was a watchpoint, stop but don't print. */
2999 /* There was a watchpoint, stop and print. */
3002 /* There was a breakpoint but we're not stopping. */
3005 /* There was a breakpoint, stop but don't print. */
3008 /* There was a breakpoint, stop and print. */
3011 /* We hit the longjmp breakpoint. */
3014 /* We hit the longjmp_resume breakpoint. */
3017 /* We hit the step_resume breakpoint. */
3020 /* We hit the shared library event breakpoint. */
3023 /* We caught a shared library event. */
3026 /* This is just used to count how many enums there are. */
3030 /* Here is the table which drives this routine. So that we can
3031 format it pretty, we define some abbreviations for the
3032 enum bpstat_what codes. */
3033 #define kc BPSTAT_WHAT_KEEP_CHECKING
3034 #define ss BPSTAT_WHAT_STOP_SILENT
3035 #define sn BPSTAT_WHAT_STOP_NOISY
3036 #define sgl BPSTAT_WHAT_SINGLE
3037 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
3038 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
3039 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
3040 #define sr BPSTAT_WHAT_STEP_RESUME
3041 #define shl BPSTAT_WHAT_CHECK_SHLIBS
3042 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
3044 /* "Can't happen." Might want to print an error message.
3045 abort() is not out of the question, but chances are GDB is just
3046 a bit confused, not unusable. */
3047 #define err BPSTAT_WHAT_STOP_NOISY
3049 /* Given an old action and a class, come up with a new action. */
3050 /* One interesting property of this table is that wp_silent is the same
3051 as bp_silent and wp_noisy is the same as bp_noisy. That is because
3052 after stopping, the check for whether to step over a breakpoint
3053 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
3054 reference to how we stopped. We retain separate wp_silent and
3055 bp_silent codes in case we want to change that someday.
3057 Another possibly interesting property of this table is that
3058 there's a partial ordering, priority-like, of the actions. Once
3059 you've decided that some action is appropriate, you'll never go
3060 back and decide something of a lower priority is better. The
3063 kc < clr sgl shl shlr slr sn sr ss
3064 sgl < clrs shl shlr slr sn sr ss
3065 slr < err shl shlr sn sr ss
3066 clr < clrs err shl shlr sn sr ss
3067 clrs < err shl shlr sn sr ss
3074 What I think this means is that we don't need a damned table
3075 here. If you just put the rows and columns in the right order,
3076 it'd look awfully regular. We could simply walk the bpstat list
3077 and choose the highest priority action we find, with a little
3078 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
3079 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
3080 is messy anyway). */
3082 /* step_resume entries: a step resume breakpoint overrides another
3083 breakpoint of signal handling (see comment in wait_for_inferior
3084 at where we set the step_resume breakpoint). */
3086 static const enum bpstat_what_main_action
3087 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3090 /* kc ss sn sgl slr clr clrs sr shl shlr
3093 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, shl
, shlr
},
3095 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, shl
, shlr
},
3097 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
, shlr
},
3099 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, shl
, shlr
},
3101 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, shl
, shlr
},
3103 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
, shlr
},
3105 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, shl
, shlr
},
3107 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, shl
, shlr
},
3109 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
},
3111 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, sr
, shl
, shlr
},
3113 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, sr
, shlr
, shlr
}
3128 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3129 struct bpstat_what retval
;
3131 retval
.call_dummy
= 0;
3132 for (; bs
!= NULL
; bs
= bs
->next
)
3134 enum class bs_class
= no_effect
;
3135 if (bs
->breakpoint_at
== NULL
)
3136 /* I suspect this can happen if it was a momentary breakpoint
3137 which has since been deleted. */
3139 switch (bs
->breakpoint_at
->type
)
3145 case bp_hardware_breakpoint
:
3151 bs_class
= bp_noisy
;
3153 bs_class
= bp_silent
;
3156 bs_class
= bp_nostop
;
3159 case bp_hardware_watchpoint
:
3160 case bp_read_watchpoint
:
3161 case bp_access_watchpoint
:
3165 bs_class
= wp_noisy
;
3167 bs_class
= wp_silent
;
3170 /* There was a watchpoint, but we're not stopping.
3171 This requires no further action. */
3172 bs_class
= no_effect
;
3175 bs_class
= long_jump
;
3177 case bp_longjmp_resume
:
3178 bs_class
= long_resume
;
3180 case bp_step_resume
:
3183 bs_class
= step_resume
;
3186 /* It is for the wrong frame. */
3187 bs_class
= bp_nostop
;
3189 case bp_watchpoint_scope
:
3190 bs_class
= bp_nostop
;
3192 case bp_shlib_event
:
3193 bs_class
= shlib_event
;
3195 case bp_thread_event
:
3196 case bp_overlay_event
:
3197 bs_class
= bp_nostop
;
3200 case bp_catch_unload
:
3201 /* Only if this catchpoint triggered should we cause the
3202 step-out-of-dld behaviour. Otherwise, we ignore this
3205 bs_class
= catch_shlib_event
;
3207 bs_class
= no_effect
;
3210 case bp_catch_vfork
:
3215 bs_class
= bp_noisy
;
3217 bs_class
= bp_silent
;
3220 /* There was a catchpoint, but we're not stopping.
3221 This requires no further action. */
3222 bs_class
= no_effect
;
3224 case bp_catch_catch
:
3225 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3226 bs_class
= bp_nostop
;
3228 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3230 case bp_catch_throw
:
3231 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3232 bs_class
= bp_nostop
;
3234 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3237 /* Make sure the action is stop (silent or noisy),
3238 so infrun.c pops the dummy frame. */
3239 bs_class
= bp_silent
;
3240 retval
.call_dummy
= 1;
3243 current_action
= table
[(int) bs_class
][(int) current_action
];
3245 retval
.main_action
= current_action
;
3249 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3250 without hardware support). This isn't related to a specific bpstat,
3251 just to things like whether watchpoints are set. */
3254 bpstat_should_step (void)
3256 struct breakpoint
*b
;
3258 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3263 /* Nonzero if there are enabled hardware watchpoints. */
3265 bpstat_have_active_hw_watchpoints (void)
3267 struct bp_location
*bpt
;
3268 ALL_BP_LOCATIONS (bpt
)
3269 if (breakpoint_enabled (bpt
->owner
)
3271 && bpt
->loc_type
== bp_loc_hardware_watchpoint
)
3277 /* Given a bpstat that records zero or more triggered eventpoints, this
3278 function returns another bpstat which contains only the catchpoints
3279 on that first list, if any. */
3281 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3283 struct bpstats root_bs
[1];
3284 bpstat bs
= root_bs
;
3285 struct breakpoint
*ep
;
3288 bpstat_clear (cp_list
);
3289 root_bs
->next
= NULL
;
3291 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3293 /* Is this eventpoint a catchpoint? If not, ignore it. */
3294 ep
= ep_list
->breakpoint_at
;
3297 if ((ep
->type
!= bp_catch_load
) &&
3298 (ep
->type
!= bp_catch_unload
) &&
3299 (ep
->type
!= bp_catch_catch
) &&
3300 (ep
->type
!= bp_catch_throw
))
3301 /* pai: (temp) ADD fork/vfork here!! */
3304 /* Yes; add it to the list. */
3305 bs
= bpstat_alloc (ep
, bs
);
3310 #if defined(SOLIB_ADD)
3311 /* Also, for each triggered catchpoint, tag it with the name of
3312 the library that caused this trigger. (We copy the name now,
3313 because it's only guaranteed to be available NOW, when the
3314 catchpoint triggers. Clients who may wish to know the name
3315 later must get it from the catchpoint itself.) */
3316 if (ep
->triggered_dll_pathname
!= NULL
)
3317 xfree (ep
->triggered_dll_pathname
);
3318 if (ep
->type
== bp_catch_load
)
3319 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3320 PIDGET (inferior_ptid
));
3322 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3323 PIDGET (inferior_ptid
));
3325 dll_pathname
= NULL
;
3329 ep
->triggered_dll_pathname
= (char *)
3330 xmalloc (strlen (dll_pathname
) + 1);
3331 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3334 ep
->triggered_dll_pathname
= NULL
;
3340 /* Print B to gdb_stdout. */
3342 print_one_breakpoint (struct breakpoint
*b
,
3343 CORE_ADDR
*last_addr
)
3345 struct command_line
*l
;
3347 struct ep_type_description
3352 static struct ep_type_description bptypes
[] =
3354 {bp_none
, "?deleted?"},
3355 {bp_breakpoint
, "breakpoint"},
3356 {bp_hardware_breakpoint
, "hw breakpoint"},
3357 {bp_until
, "until"},
3358 {bp_finish
, "finish"},
3359 {bp_watchpoint
, "watchpoint"},
3360 {bp_hardware_watchpoint
, "hw watchpoint"},
3361 {bp_read_watchpoint
, "read watchpoint"},
3362 {bp_access_watchpoint
, "acc watchpoint"},
3363 {bp_longjmp
, "longjmp"},
3364 {bp_longjmp_resume
, "longjmp resume"},
3365 {bp_step_resume
, "step resume"},
3366 {bp_watchpoint_scope
, "watchpoint scope"},
3367 {bp_call_dummy
, "call dummy"},
3368 {bp_shlib_event
, "shlib events"},
3369 {bp_thread_event
, "thread events"},
3370 {bp_overlay_event
, "overlay events"},
3371 {bp_catch_load
, "catch load"},
3372 {bp_catch_unload
, "catch unload"},
3373 {bp_catch_fork
, "catch fork"},
3374 {bp_catch_vfork
, "catch vfork"},
3375 {bp_catch_exec
, "catch exec"},
3376 {bp_catch_catch
, "catch catch"},
3377 {bp_catch_throw
, "catch throw"}
3380 static char *bpdisps
[] =
3381 {"del", "dstp", "dis", "keep"};
3382 static char bpenables
[] = "nynny";
3383 char wrap_indent
[80];
3384 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3385 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3386 struct cleanup
*bkpt_chain
;
3389 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3393 ui_out_field_int (uiout
, "number", b
->number
);
3397 if (((int) b
->type
>= (sizeof (bptypes
) / sizeof (bptypes
[0])))
3398 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3399 internal_error (__FILE__
, __LINE__
,
3400 _("bptypes table does not describe type #%d."),
3402 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3406 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3410 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3411 ui_out_spaces (uiout
, 2);
3414 strcpy (wrap_indent
, " ");
3417 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3418 strcat (wrap_indent
, " ");
3420 strcat (wrap_indent
, " ");
3423 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3424 b
->ops
->print_one (b
, last_addr
);
3429 internal_error (__FILE__
, __LINE__
,
3430 _("print_one_breakpoint: bp_none encountered\n"));
3434 case bp_hardware_watchpoint
:
3435 case bp_read_watchpoint
:
3436 case bp_access_watchpoint
:
3437 /* Field 4, the address, is omitted (which makes the columns
3438 not line up too nicely with the headers, but the effect
3439 is relatively readable). */
3441 ui_out_field_skip (uiout
, "addr");
3443 print_expression (b
->exp
, stb
->stream
);
3444 ui_out_field_stream (uiout
, "what", stb
);
3448 case bp_catch_unload
:
3449 /* Field 4, the address, is omitted (which makes the columns
3450 not line up too nicely with the headers, but the effect
3451 is relatively readable). */
3453 ui_out_field_skip (uiout
, "addr");
3455 if (b
->dll_pathname
== NULL
)
3457 ui_out_field_string (uiout
, "what", "<any library>");
3458 ui_out_spaces (uiout
, 1);
3462 ui_out_text (uiout
, "library \"");
3463 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3464 ui_out_text (uiout
, "\" ");
3469 case bp_catch_vfork
:
3470 /* Field 4, the address, is omitted (which makes the columns
3471 not line up too nicely with the headers, but the effect
3472 is relatively readable). */
3474 ui_out_field_skip (uiout
, "addr");
3476 if (b
->forked_inferior_pid
!= 0)
3478 ui_out_text (uiout
, "process ");
3479 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3480 ui_out_spaces (uiout
, 1);
3485 /* Field 4, the address, is omitted (which makes the columns
3486 not line up too nicely with the headers, but the effect
3487 is relatively readable). */
3489 ui_out_field_skip (uiout
, "addr");
3491 if (b
->exec_pathname
!= NULL
)
3493 ui_out_text (uiout
, "program \"");
3494 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3495 ui_out_text (uiout
, "\" ");
3499 case bp_catch_catch
:
3500 /* Field 4, the address, is omitted (which makes the columns
3501 not line up too nicely with the headers, but the effect
3502 is relatively readable). */
3504 ui_out_field_skip (uiout
, "addr");
3506 ui_out_field_string (uiout
, "what", "exception catch");
3507 ui_out_spaces (uiout
, 1);
3510 case bp_catch_throw
:
3511 /* Field 4, the address, is omitted (which makes the columns
3512 not line up too nicely with the headers, but the effect
3513 is relatively readable). */
3515 ui_out_field_skip (uiout
, "addr");
3517 ui_out_field_string (uiout
, "what", "exception throw");
3518 ui_out_spaces (uiout
, 1);
3522 case bp_hardware_breakpoint
:
3526 case bp_longjmp_resume
:
3527 case bp_step_resume
:
3528 case bp_watchpoint_scope
:
3530 case bp_shlib_event
:
3531 case bp_thread_event
:
3532 case bp_overlay_event
:
3537 ui_out_field_string (uiout
, "addr", "<PENDING>");
3539 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
3542 *last_addr
= b
->loc
->address
;
3545 sym
= find_pc_sect_function (b
->loc
->address
, b
->loc
->section
);
3548 ui_out_text (uiout
, "in ");
3549 ui_out_field_string (uiout
, "func",
3550 SYMBOL_PRINT_NAME (sym
));
3551 ui_out_wrap_hint (uiout
, wrap_indent
);
3552 ui_out_text (uiout
, " at ");
3554 ui_out_field_string (uiout
, "file", b
->source_file
);
3555 ui_out_text (uiout
, ":");
3557 if (ui_out_is_mi_like_p (uiout
))
3559 struct symtab_and_line sal
= find_pc_line (b
->loc
->address
, 0);
3560 char *fullname
= symtab_to_fullname (sal
.symtab
);
3563 ui_out_field_string (uiout
, "fullname", fullname
);
3566 ui_out_field_int (uiout
, "line", b
->line_number
);
3568 else if (b
->pending
)
3570 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3574 print_address_symbolic (b
->loc
->address
, stb
->stream
, demangle
, "");
3575 ui_out_field_stream (uiout
, "at", stb
);
3580 if (b
->thread
!= -1)
3582 /* FIXME: This seems to be redundant and lost here; see the
3583 "stop only in" line a little further down. */
3584 ui_out_text (uiout
, " thread ");
3585 ui_out_field_int (uiout
, "thread", b
->thread
);
3588 ui_out_text (uiout
, "\n");
3590 if (frame_id_p (b
->frame_id
))
3593 ui_out_text (uiout
, "\tstop only in stack frame at ");
3594 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3596 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3597 ui_out_text (uiout
, "\n");
3600 if (b
->cond
&& !ada_exception_catchpoint_p (b
))
3602 /* We do not print the condition for Ada exception catchpoints
3603 because the condition is an internal implementation detail
3604 that we do not want to expose to the user. */
3606 ui_out_text (uiout
, "\tstop only if ");
3607 print_expression (b
->cond
, stb
->stream
);
3608 ui_out_field_stream (uiout
, "cond", stb
);
3609 ui_out_text (uiout
, "\n");
3612 if (b
->pending
&& b
->cond_string
)
3615 ui_out_text (uiout
, "\tstop only if ");
3616 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3617 ui_out_text (uiout
, "\n");
3620 if (b
->thread
!= -1)
3622 /* FIXME should make an annotation for this */
3623 ui_out_text (uiout
, "\tstop only in thread ");
3624 ui_out_field_int (uiout
, "thread", b
->thread
);
3625 ui_out_text (uiout
, "\n");
3628 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3630 /* FIXME should make an annotation for this */
3631 if (ep_is_catchpoint (b
))
3632 ui_out_text (uiout
, "\tcatchpoint");
3634 ui_out_text (uiout
, "\tbreakpoint");
3635 ui_out_text (uiout
, " already hit ");
3636 ui_out_field_int (uiout
, "times", b
->hit_count
);
3637 if (b
->hit_count
== 1)
3638 ui_out_text (uiout
, " time\n");
3640 ui_out_text (uiout
, " times\n");
3643 /* Output the count also if it is zero, but only if this is
3644 mi. FIXME: Should have a better test for this. */
3645 if (ui_out_is_mi_like_p (uiout
))
3646 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3647 ui_out_field_int (uiout
, "times", b
->hit_count
);
3649 if (b
->ignore_count
)
3652 ui_out_text (uiout
, "\tignore next ");
3653 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3654 ui_out_text (uiout
, " hits\n");
3657 if ((l
= b
->commands
))
3659 struct cleanup
*script_chain
;
3662 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3663 print_command_lines (uiout
, l
, 4);
3664 do_cleanups (script_chain
);
3666 do_cleanups (bkpt_chain
);
3667 do_cleanups (old_chain
);
3670 struct captured_breakpoint_query_args
3676 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3678 struct captured_breakpoint_query_args
*args
= data
;
3679 struct breakpoint
*b
;
3680 CORE_ADDR dummy_addr
= 0;
3683 if (args
->bnum
== b
->number
)
3685 print_one_breakpoint (b
, &dummy_addr
);
3693 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3695 struct captured_breakpoint_query_args args
;
3697 /* For the moment we don't trust print_one_breakpoint() to not throw
3699 if (catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3700 error_message
, RETURN_MASK_ALL
) < 0)
3706 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3707 catchpoints, et.al.). */
3710 user_settable_breakpoint (const struct breakpoint
*b
)
3712 return (b
->type
== bp_breakpoint
3713 || b
->type
== bp_catch_load
3714 || b
->type
== bp_catch_unload
3715 || b
->type
== bp_catch_fork
3716 || b
->type
== bp_catch_vfork
3717 || b
->type
== bp_catch_exec
3718 || b
->type
== bp_catch_catch
3719 || b
->type
== bp_catch_throw
3720 || b
->type
== bp_hardware_breakpoint
3721 || b
->type
== bp_watchpoint
3722 || b
->type
== bp_read_watchpoint
3723 || b
->type
== bp_access_watchpoint
3724 || b
->type
== bp_hardware_watchpoint
);
3727 /* Print information on user settable breakpoint (watchpoint, etc)
3728 number BNUM. If BNUM is -1 print all user settable breakpoints.
3729 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3732 breakpoint_1 (int bnum
, int allflag
)
3734 struct breakpoint
*b
;
3735 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3736 int nr_printable_breakpoints
;
3737 struct cleanup
*bkpttbl_chain
;
3739 /* Compute the number of rows in the table. */
3740 nr_printable_breakpoints
= 0;
3743 || bnum
== b
->number
)
3745 if (allflag
|| user_settable_breakpoint (b
))
3746 nr_printable_breakpoints
++;
3751 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3755 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3758 if (nr_printable_breakpoints
> 0)
3759 annotate_breakpoints_headers ();
3760 if (nr_printable_breakpoints
> 0)
3762 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3763 if (nr_printable_breakpoints
> 0)
3765 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3766 if (nr_printable_breakpoints
> 0)
3768 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3769 if (nr_printable_breakpoints
> 0)
3771 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3774 if (nr_printable_breakpoints
> 0)
3776 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3777 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3779 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3781 if (nr_printable_breakpoints
> 0)
3783 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3784 ui_out_table_body (uiout
);
3785 if (nr_printable_breakpoints
> 0)
3786 annotate_breakpoints_table ();
3790 || bnum
== b
->number
)
3792 /* We only print out user settable breakpoints unless the
3794 if (allflag
|| user_settable_breakpoint (b
))
3795 print_one_breakpoint (b
, &last_addr
);
3798 do_cleanups (bkpttbl_chain
);
3800 if (nr_printable_breakpoints
== 0)
3803 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3805 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3810 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3811 that a comparison of an unsigned with -1 is always false. */
3812 if (last_addr
!= (CORE_ADDR
) -1 && !server_command
)
3813 set_next_address (last_addr
);
3816 /* FIXME? Should this be moved up so that it is only called when
3817 there have been breakpoints? */
3818 annotate_breakpoints_table_end ();
3822 breakpoints_info (char *bnum_exp
, int from_tty
)
3827 bnum
= parse_and_eval_long (bnum_exp
);
3829 breakpoint_1 (bnum
, 0);
3833 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3838 bnum
= parse_and_eval_long (bnum_exp
);
3840 breakpoint_1 (bnum
, 1);
3843 /* Print a message describing any breakpoints set at PC. */
3846 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
, int thread
)
3849 struct breakpoint
*b
;
3852 if (b
->loc
->address
== pc
) /* address match / overlay match */
3853 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3858 printf_filtered (_("Note: breakpoint "));
3859 else /* if (others == ???) */
3860 printf_filtered (_("Note: breakpoints "));
3862 if (b
->loc
->address
== pc
) /* address match / overlay match */
3863 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3866 printf_filtered ("%d", b
->number
);
3867 if (b
->thread
== -1 && thread
!= -1)
3868 printf_filtered (" (all threads)");
3869 else if (b
->thread
!= -1)
3870 printf_filtered (" (thread %d)", b
->thread
);
3871 printf_filtered ("%s%s ",
3872 ((b
->enable_state
== bp_disabled
||
3873 b
->enable_state
== bp_shlib_disabled
||
3874 b
->enable_state
== bp_call_disabled
)
3876 : b
->enable_state
== bp_permanent
3880 : ((others
== 1) ? " and" : ""));
3882 printf_filtered (_("also set at pc "));
3883 deprecated_print_address_numeric (pc
, 1, gdb_stdout
);
3884 printf_filtered (".\n");
3888 /* Set the default place to put a breakpoint
3889 for the `break' command with no arguments. */
3892 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3895 default_breakpoint_valid
= valid
;
3896 default_breakpoint_address
= addr
;
3897 default_breakpoint_symtab
= symtab
;
3898 default_breakpoint_line
= line
;
3901 /* Return true iff it is meaningful to use the address member of
3902 BPT. For some breakpoint types, the address member is irrelevant
3903 and it makes no sense to attempt to compare it to other addresses
3904 (or use it for any other purpose either).
3906 More specifically, each of the following breakpoint types will always
3907 have a zero valued address and we don't want check_duplicates() to mark
3908 breakpoints of any of these types to be a duplicate of an actual
3909 breakpoint at address zero:
3912 bp_hardware_watchpoint
3914 bp_access_watchpoint
3921 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3923 enum bptype type
= bpt
->type
;
3925 return (type
!= bp_watchpoint
3926 && type
!= bp_hardware_watchpoint
3927 && type
!= bp_read_watchpoint
3928 && type
!= bp_access_watchpoint
3929 && type
!= bp_catch_exec
3930 && type
!= bp_longjmp_resume
3931 && type
!= bp_catch_fork
3932 && type
!= bp_catch_vfork
);
3935 /* Rescan breakpoints at the same address and section as BPT,
3936 marking the first one as "first" and any others as "duplicates".
3937 This is so that the bpt instruction is only inserted once.
3938 If we have a permanent breakpoint at the same place as BPT, make
3939 that one the official one, and the rest as duplicates. */
3942 check_duplicates (struct breakpoint
*bpt
)
3944 struct bp_location
*b
;
3946 struct bp_location
*perm_bp
= 0;
3947 CORE_ADDR address
= bpt
->loc
->address
;
3948 asection
*section
= bpt
->loc
->section
;
3950 if (! breakpoint_address_is_meaningful (bpt
))
3953 ALL_BP_LOCATIONS (b
)
3954 if (b
->owner
->enable_state
!= bp_disabled
3955 && b
->owner
->enable_state
!= bp_shlib_disabled
3956 && !b
->owner
->pending
3957 && b
->owner
->enable_state
!= bp_call_disabled
3958 && b
->address
== address
/* address / overlay match */
3959 && (!overlay_debugging
|| b
->section
== section
)
3960 && breakpoint_address_is_meaningful (b
->owner
))
3962 /* Have we found a permanent breakpoint? */
3963 if (b
->owner
->enable_state
== bp_permanent
)
3970 b
->duplicate
= count
> 1;
3973 /* If we found a permanent breakpoint at this address, go over the
3974 list again and declare all the other breakpoints there to be the
3978 perm_bp
->duplicate
= 0;
3980 /* Permanent breakpoint should always be inserted. */
3981 if (! perm_bp
->inserted
)
3982 internal_error (__FILE__
, __LINE__
,
3983 _("allegedly permanent breakpoint is not "
3984 "actually inserted"));
3986 ALL_BP_LOCATIONS (b
)
3989 if (b
->owner
->enable_state
!= bp_disabled
3990 && b
->owner
->enable_state
!= bp_shlib_disabled
3991 && !b
->owner
->pending
3992 && b
->owner
->enable_state
!= bp_call_disabled
3993 && b
->address
== address
/* address / overlay match */
3994 && (!overlay_debugging
|| b
->section
== section
)
3995 && breakpoint_address_is_meaningful (b
->owner
))
3998 internal_error (__FILE__
, __LINE__
,
3999 _("another breakpoint was inserted on top of "
4000 "a permanent breakpoint"));
4009 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
4010 int bnum
, int have_bnum
)
4015 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
4016 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
4018 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4019 bnum
, astr1
, astr2
);
4021 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
4024 /* Adjust a breakpoint's address to account for architectural constraints
4025 on breakpoint placement. Return the adjusted address. Note: Very
4026 few targets require this kind of adjustment. For most targets,
4027 this function is simply the identity function. */
4030 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
4032 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
4034 /* Very few targets need any kind of breakpoint adjustment. */
4037 else if (bptype
== bp_watchpoint
4038 || bptype
== bp_hardware_watchpoint
4039 || bptype
== bp_read_watchpoint
4040 || bptype
== bp_access_watchpoint
4041 || bptype
== bp_catch_fork
4042 || bptype
== bp_catch_vfork
4043 || bptype
== bp_catch_exec
)
4045 /* Watchpoints and the various bp_catch_* eventpoints should not
4046 have their addresses modified. */
4051 CORE_ADDR adjusted_bpaddr
;
4053 /* Some targets have architectural constraints on the placement
4054 of breakpoint instructions. Obtain the adjusted address. */
4055 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
4058 /* An adjusted breakpoint address can significantly alter
4059 a user's expectations. Print a warning if an adjustment
4061 if (adjusted_bpaddr
!= bpaddr
)
4062 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
4064 return adjusted_bpaddr
;
4068 /* Allocate a struct bp_location. */
4070 static struct bp_location
*
4071 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
4073 struct bp_location
*loc
, *loc_p
;
4075 loc
= xmalloc (sizeof (struct bp_location
));
4076 memset (loc
, 0, sizeof (*loc
));
4086 case bp_longjmp_resume
:
4087 case bp_step_resume
:
4088 case bp_watchpoint_scope
:
4090 case bp_shlib_event
:
4091 case bp_thread_event
:
4092 case bp_overlay_event
:
4094 case bp_catch_unload
:
4095 loc
->loc_type
= bp_loc_software_breakpoint
;
4097 case bp_hardware_breakpoint
:
4098 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4100 case bp_hardware_watchpoint
:
4101 case bp_read_watchpoint
:
4102 case bp_access_watchpoint
:
4103 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4107 case bp_catch_vfork
:
4109 case bp_catch_catch
:
4110 case bp_catch_throw
:
4111 loc
->loc_type
= bp_loc_other
;
4114 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
4117 /* Add this breakpoint to the end of the chain. */
4119 loc_p
= bp_location_chain
;
4121 bp_location_chain
= loc
;
4125 loc_p
= loc_p
->next
;
4132 /* set_raw_breakpoint() is a low level routine for allocating and
4133 partially initializing a breakpoint of type BPTYPE. The newly
4134 created breakpoint's address, section, source file name, and line
4135 number are provided by SAL. The newly created and partially
4136 initialized breakpoint is added to the breakpoint chain and
4137 is also returned as the value of this function.
4139 It is expected that the caller will complete the initialization of
4140 the newly created breakpoint struct as well as output any status
4141 information regarding the creation of a new breakpoint. In
4142 particular, set_raw_breakpoint() does NOT set the breakpoint
4143 number! Care should be taken to not allow an error() to occur
4144 prior to completing the initialization of the breakpoint. If this
4145 should happen, a bogus breakpoint will be left on the chain. */
4148 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4150 struct breakpoint
*b
, *b1
;
4151 CORE_ADDR adjusted_address
;
4153 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4154 memset (b
, 0, sizeof (*b
));
4156 /* Adjust the breakpoint's address prior to allocating a location.
4157 Once we call allocate_bp_location(), that mostly uninitialized
4158 location will be placed on the location chain. Adjustment of the
4159 breakpoint may cause read_memory_nobpt() to be called and we do
4160 not want its scan of the location chain to find a breakpoint and
4161 location that's only been partially initialized. */
4162 adjusted_address
= adjust_breakpoint_address (sal
.pc
, bptype
);
4164 b
->loc
= allocate_bp_location (b
, bptype
);
4165 b
->loc
->requested_address
= sal
.pc
;
4166 b
->loc
->address
= adjusted_address
;
4168 if (sal
.symtab
== NULL
)
4169 b
->source_file
= NULL
;
4171 b
->source_file
= savestring (sal
.symtab
->filename
,
4172 strlen (sal
.symtab
->filename
));
4173 b
->loc
->section
= sal
.section
;
4175 b
->language
= current_language
->la_language
;
4176 b
->input_radix
= input_radix
;
4178 b
->line_number
= sal
.line
;
4179 b
->enable_state
= bp_enabled
;
4182 b
->ignore_count
= 0;
4184 b
->frame_id
= null_frame_id
;
4185 b
->dll_pathname
= NULL
;
4186 b
->triggered_dll_pathname
= NULL
;
4187 b
->forked_inferior_pid
= 0;
4188 b
->exec_pathname
= NULL
;
4192 /* Add this breakpoint to the end of the chain
4193 so that a list of breakpoints will come out in order
4194 of increasing numbers. */
4196 b1
= breakpoint_chain
;
4198 breakpoint_chain
= b
;
4206 check_duplicates (b
);
4207 breakpoints_changed ();
4213 /* Note that the breakpoint object B describes a permanent breakpoint
4214 instruction, hard-wired into the inferior's code. */
4216 make_breakpoint_permanent (struct breakpoint
*b
)
4218 b
->enable_state
= bp_permanent
;
4220 /* By definition, permanent breakpoints are already present in the code. */
4221 b
->loc
->inserted
= 1;
4224 static struct breakpoint
*
4225 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4227 static int internal_breakpoint_number
= -1;
4228 struct symtab_and_line sal
;
4229 struct breakpoint
*b
;
4231 init_sal (&sal
); /* initialize to zeroes */
4234 sal
.section
= find_pc_overlay (sal
.pc
);
4236 b
= set_raw_breakpoint (sal
, type
);
4237 b
->number
= internal_breakpoint_number
--;
4238 b
->disposition
= disp_donttouch
;
4245 create_longjmp_breakpoint (char *func_name
)
4247 struct breakpoint
*b
;
4248 struct minimal_symbol
*m
;
4250 if (func_name
== NULL
)
4251 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
4254 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4257 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4260 b
->enable_state
= bp_disabled
;
4263 b
->addr_string
= xstrdup (func_name
);
4266 /* Call this routine when stepping and nexting to enable a breakpoint
4267 if we do a longjmp(). When we hit that breakpoint, call
4268 set_longjmp_resume_breakpoint() to figure out where we are going. */
4271 enable_longjmp_breakpoint (void)
4273 struct breakpoint
*b
;
4276 if (b
->type
== bp_longjmp
)
4278 b
->enable_state
= bp_enabled
;
4279 check_duplicates (b
);
4284 disable_longjmp_breakpoint (void)
4286 struct breakpoint
*b
;
4289 if (b
->type
== bp_longjmp
4290 || b
->type
== bp_longjmp_resume
)
4292 b
->enable_state
= bp_disabled
;
4293 check_duplicates (b
);
4298 create_overlay_event_breakpoint (char *func_name
)
4300 struct breakpoint
*b
;
4301 struct minimal_symbol
*m
;
4303 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4306 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4308 b
->addr_string
= xstrdup (func_name
);
4310 if (overlay_debugging
== ovly_auto
)
4312 b
->enable_state
= bp_enabled
;
4313 overlay_events_enabled
= 1;
4317 b
->enable_state
= bp_disabled
;
4318 overlay_events_enabled
= 0;
4323 enable_overlay_breakpoints (void)
4325 struct breakpoint
*b
;
4328 if (b
->type
== bp_overlay_event
)
4330 b
->enable_state
= bp_enabled
;
4331 check_duplicates (b
);
4332 overlay_events_enabled
= 1;
4337 disable_overlay_breakpoints (void)
4339 struct breakpoint
*b
;
4342 if (b
->type
== bp_overlay_event
)
4344 b
->enable_state
= bp_disabled
;
4345 check_duplicates (b
);
4346 overlay_events_enabled
= 0;
4351 create_thread_event_breakpoint (CORE_ADDR address
)
4353 struct breakpoint
*b
;
4355 b
= create_internal_breakpoint (address
, bp_thread_event
);
4357 b
->enable_state
= bp_enabled
;
4358 /* addr_string has to be used or breakpoint_re_set will delete me. */
4359 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4365 remove_thread_event_breakpoints (void)
4367 struct breakpoint
*b
, *temp
;
4369 ALL_BREAKPOINTS_SAFE (b
, temp
)
4370 if (b
->type
== bp_thread_event
)
4371 delete_breakpoint (b
);
4374 struct captured_parse_breakpoint_args
4377 struct symtabs_and_lines
*sals_p
;
4378 char ***addr_string_p
;
4382 struct lang_and_radix
4388 /* Cleanup helper routine to restore the current language and
4391 do_restore_lang_radix_cleanup (void *old
)
4393 struct lang_and_radix
*p
= old
;
4394 set_language (p
->lang
);
4395 input_radix
= p
->radix
;
4398 /* Try and resolve a pending breakpoint. */
4400 resolve_pending_breakpoint (struct breakpoint
*b
)
4402 /* Try and reparse the breakpoint in case the shared library
4404 struct symtabs_and_lines sals
;
4405 struct symtab_and_line pending_sal
;
4406 char **cond_string
= (char **) NULL
;
4407 char *copy_arg
= b
->addr_string
;
4412 struct ui_file
*old_gdb_stderr
;
4413 struct lang_and_radix old_lr
;
4414 struct cleanup
*old_chain
;
4416 /* Set language, input-radix, then reissue breakpoint command.
4417 Ensure the language and input-radix are restored afterwards. */
4418 old_lr
.lang
= current_language
->la_language
;
4419 old_lr
.radix
= input_radix
;
4420 old_chain
= make_cleanup (do_restore_lang_radix_cleanup
, &old_lr
);
4422 set_language (b
->language
);
4423 input_radix
= b
->input_radix
;
4424 rc
= break_command_1 (b
->addr_string
, b
->flag
, b
->from_tty
, b
);
4426 if (rc
== GDB_RC_OK
)
4427 /* Pending breakpoint has been resolved. */
4428 printf_filtered (_("Pending breakpoint \"%s\" resolved\n"), b
->addr_string
);
4430 do_cleanups (old_chain
);
4435 remove_solib_event_breakpoints (void)
4437 struct breakpoint
*b
, *temp
;
4439 ALL_BREAKPOINTS_SAFE (b
, temp
)
4440 if (b
->type
== bp_shlib_event
)
4441 delete_breakpoint (b
);
4445 create_solib_event_breakpoint (CORE_ADDR address
)
4447 struct breakpoint
*b
;
4449 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4453 /* Disable any breakpoints that are on code in shared libraries. Only
4454 apply to enabled breakpoints, disabled ones can just stay disabled. */
4457 disable_breakpoints_in_shlibs (void)
4459 struct breakpoint
*b
;
4460 int disabled_shlib_breaks
= 0;
4464 if (((b
->type
== bp_breakpoint
) || (b
->type
== bp_hardware_breakpoint
))
4465 && breakpoint_enabled (b
) && !b
->loc
->duplicate
4467 && PC_SOLIB (b
->loc
->address
)
4469 && solib_address (b
->loc
->address
)
4472 b
->enable_state
= bp_shlib_disabled
;
4476 /* Disable any breakpoints that are in in an unloaded shared library. Only
4477 apply to enabled breakpoints, disabled ones can just stay disabled. */
4480 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4482 struct breakpoint
*b
;
4483 int disabled_shlib_breaks
= 0;
4487 if ((b
->loc
->loc_type
== bp_loc_hardware_breakpoint
4488 || b
->loc
->loc_type
== bp_loc_software_breakpoint
)
4489 && breakpoint_enabled (b
) && !b
->loc
->duplicate
)
4492 char *so_name
= PC_SOLIB (b
->loc
->address
);
4494 char *so_name
= solib_address (b
->loc
->address
);
4496 if (so_name
&& !strcmp (so_name
, solib
->so_name
))
4498 b
->enable_state
= bp_shlib_disabled
;
4499 /* At this point, we cannot rely on remove_breakpoint
4500 succeeding so we must mark the breakpoint as not inserted
4501 to prevent future errors occurring in remove_breakpoints. */
4502 b
->loc
->inserted
= 0;
4503 if (!disabled_shlib_breaks
)
4505 target_terminal_ours_for_output ();
4506 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4509 disabled_shlib_breaks
= 1;
4515 /* Try to reenable any breakpoints in shared libraries. */
4517 re_enable_breakpoints_in_shlibs (void)
4519 struct breakpoint
*b
, *tmp
;
4521 ALL_BREAKPOINTS_SAFE (b
, tmp
)
4523 if (b
->enable_state
== bp_shlib_disabled
)
4528 /* Do not reenable the breakpoint if the shared library is
4529 still not mapped in. */
4531 lib
= PC_SOLIB (b
->loc
->address
);
4533 lib
= solib_address (b
->loc
->address
);
4535 if (lib
!= NULL
&& target_read_memory (b
->loc
->address
, buf
, 1) == 0)
4536 b
->enable_state
= bp_enabled
;
4538 else if (b
->pending
&& (b
->enable_state
== bp_enabled
))
4540 if (resolve_pending_breakpoint (b
) == GDB_RC_OK
)
4541 delete_breakpoint (b
);
4547 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4548 char *cond_string
, enum bptype bp_kind
)
4550 struct breakpoint
*b
;
4551 struct symtabs_and_lines sals
;
4552 struct cleanup
*old_chain
;
4553 struct cleanup
*canonical_strings_chain
= NULL
;
4554 char *addr_start
= hookname
;
4555 char *addr_end
= NULL
;
4556 char **canonical
= (char **) NULL
;
4557 int thread
= -1; /* All threads. */
4559 /* Set a breakpoint on the specified hook. */
4560 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
,
4561 0, &canonical
, NULL
);
4562 addr_end
= hookname
;
4564 if (sals
.nelts
== 0)
4566 warning (_("Unable to set a breakpoint on dynamic linker callback.\n"
4567 "Suggest linking with /opt/langtools/lib/end.o.\n"
4568 "GDB will be unable to track shl_load/shl_unload calls."));
4571 if (sals
.nelts
!= 1)
4573 warning (_("Unable to set unique breakpoint on dynamic linker callback.\n"
4574 "GDB will be unable to track shl_load/shl_unload calls."));
4578 /* Make sure that all storage allocated in decode_line_1 gets freed
4579 in case the following errors out. */
4580 old_chain
= make_cleanup (xfree
, sals
.sals
);
4581 if (canonical
!= (char **) NULL
)
4583 make_cleanup (xfree
, canonical
);
4584 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4585 if (canonical
[0] != NULL
)
4586 make_cleanup (xfree
, canonical
[0]);
4589 resolve_sal_pc (&sals
.sals
[0]);
4591 /* Remove the canonical strings from the cleanup, they are needed below. */
4592 if (canonical
!= (char **) NULL
)
4593 discard_cleanups (canonical_strings_chain
);
4595 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4596 set_breakpoint_count (breakpoint_count
+ 1);
4597 b
->number
= breakpoint_count
;
4599 b
->cond_string
= (cond_string
== NULL
) ?
4600 NULL
: savestring (cond_string
, strlen (cond_string
));
4603 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4604 b
->addr_string
= canonical
[0];
4605 else if (addr_start
)
4606 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4608 b
->enable_state
= bp_enabled
;
4609 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4611 if (dll_pathname
== NULL
)
4612 b
->dll_pathname
= NULL
;
4615 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4616 strcpy (b
->dll_pathname
, dll_pathname
);
4620 do_cleanups (old_chain
);
4624 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4625 char *dll_pathname
, char *cond_string
)
4627 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4628 cond_string
, bp_catch_load
);
4632 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4633 char *dll_pathname
, char *cond_string
)
4635 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4636 cond_string
, bp_catch_unload
);
4640 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4641 enum bptype bp_kind
)
4643 struct symtab_and_line sal
;
4644 struct breakpoint
*b
;
4645 int thread
= -1; /* All threads. */
4652 b
= set_raw_breakpoint (sal
, bp_kind
);
4653 set_breakpoint_count (breakpoint_count
+ 1);
4654 b
->number
= breakpoint_count
;
4656 b
->cond_string
= (cond_string
== NULL
) ?
4657 NULL
: savestring (cond_string
, strlen (cond_string
));
4659 b
->addr_string
= NULL
;
4660 b
->enable_state
= bp_enabled
;
4661 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4662 b
->forked_inferior_pid
= 0;
4668 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4670 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4674 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4676 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4680 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4682 struct symtab_and_line sal
;
4683 struct breakpoint
*b
;
4684 int thread
= -1; /* All threads. */
4691 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4692 set_breakpoint_count (breakpoint_count
+ 1);
4693 b
->number
= breakpoint_count
;
4695 b
->cond_string
= (cond_string
== NULL
) ?
4696 NULL
: savestring (cond_string
, strlen (cond_string
));
4698 b
->addr_string
= NULL
;
4699 b
->enable_state
= bp_enabled
;
4700 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4706 hw_breakpoint_used_count (void)
4708 struct breakpoint
*b
;
4713 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4721 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4723 struct breakpoint
*b
;
4726 *other_type_used
= 0;
4729 if (breakpoint_enabled (b
))
4731 if (b
->type
== type
)
4733 else if ((b
->type
== bp_hardware_watchpoint
||
4734 b
->type
== bp_read_watchpoint
||
4735 b
->type
== bp_access_watchpoint
))
4736 *other_type_used
= 1;
4742 /* Call this after hitting the longjmp() breakpoint. Use this to set
4743 a new breakpoint at the target of the jmp_buf.
4745 FIXME - This ought to be done by setting a temporary breakpoint
4746 that gets deleted automatically... */
4749 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4751 struct breakpoint
*b
;
4754 if (b
->type
== bp_longjmp_resume
)
4756 b
->loc
->requested_address
= pc
;
4757 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
,
4759 b
->enable_state
= bp_enabled
;
4760 b
->frame_id
= frame_id
;
4761 check_duplicates (b
);
4767 disable_watchpoints_before_interactive_call_start (void)
4769 struct breakpoint
*b
;
4773 if (((b
->type
== bp_watchpoint
)
4774 || (b
->type
== bp_hardware_watchpoint
)
4775 || (b
->type
== bp_read_watchpoint
)
4776 || (b
->type
== bp_access_watchpoint
)
4777 || ep_is_exception_catchpoint (b
))
4778 && breakpoint_enabled (b
))
4780 b
->enable_state
= bp_call_disabled
;
4781 check_duplicates (b
);
4787 enable_watchpoints_after_interactive_call_stop (void)
4789 struct breakpoint
*b
;
4793 if (((b
->type
== bp_watchpoint
)
4794 || (b
->type
== bp_hardware_watchpoint
)
4795 || (b
->type
== bp_read_watchpoint
)
4796 || (b
->type
== bp_access_watchpoint
)
4797 || ep_is_exception_catchpoint (b
))
4798 && (b
->enable_state
== bp_call_disabled
))
4800 b
->enable_state
= bp_enabled
;
4801 check_duplicates (b
);
4807 /* Set a breakpoint that will evaporate an end of command
4808 at address specified by SAL.
4809 Restrict it to frame FRAME if FRAME is nonzero. */
4812 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4815 struct breakpoint
*b
;
4816 b
= set_raw_breakpoint (sal
, type
);
4817 b
->enable_state
= bp_enabled
;
4818 b
->disposition
= disp_donttouch
;
4819 b
->frame_id
= frame_id
;
4821 /* If we're debugging a multi-threaded program, then we
4822 want momentary breakpoints to be active in only a
4823 single thread of control. */
4824 if (in_thread_list (inferior_ptid
))
4825 b
->thread
= pid_to_thread_id (inferior_ptid
);
4831 /* Tell the user we have just set a breakpoint B. */
4834 mention (struct breakpoint
*b
)
4837 struct cleanup
*old_chain
, *ui_out_chain
;
4838 struct ui_stream
*stb
;
4840 stb
= ui_out_stream_new (uiout
);
4841 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4843 /* FIXME: This is misplaced; mention() is called by things (like
4844 hitting a watchpoint) other than breakpoint creation. It should
4845 be possible to clean this up and at the same time replace the
4846 random calls to breakpoint_changed with this hook, as has already
4847 been done for deprecated_delete_breakpoint_hook and so on. */
4848 if (deprecated_create_breakpoint_hook
)
4849 deprecated_create_breakpoint_hook (b
);
4850 breakpoint_create_event (b
->number
);
4852 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4853 b
->ops
->print_mention (b
);
4858 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b
->number
);
4861 ui_out_text (uiout
, "Watchpoint ");
4862 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4863 ui_out_field_int (uiout
, "number", b
->number
);
4864 ui_out_text (uiout
, ": ");
4865 print_expression (b
->exp
, stb
->stream
);
4866 ui_out_field_stream (uiout
, "exp", stb
);
4867 do_cleanups (ui_out_chain
);
4869 case bp_hardware_watchpoint
:
4870 ui_out_text (uiout
, "Hardware watchpoint ");
4871 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4872 ui_out_field_int (uiout
, "number", b
->number
);
4873 ui_out_text (uiout
, ": ");
4874 print_expression (b
->exp
, stb
->stream
);
4875 ui_out_field_stream (uiout
, "exp", stb
);
4876 do_cleanups (ui_out_chain
);
4878 case bp_read_watchpoint
:
4879 ui_out_text (uiout
, "Hardware read watchpoint ");
4880 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4881 ui_out_field_int (uiout
, "number", b
->number
);
4882 ui_out_text (uiout
, ": ");
4883 print_expression (b
->exp
, stb
->stream
);
4884 ui_out_field_stream (uiout
, "exp", stb
);
4885 do_cleanups (ui_out_chain
);
4887 case bp_access_watchpoint
:
4888 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4889 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4890 ui_out_field_int (uiout
, "number", b
->number
);
4891 ui_out_text (uiout
, ": ");
4892 print_expression (b
->exp
, stb
->stream
);
4893 ui_out_field_stream (uiout
, "exp", stb
);
4894 do_cleanups (ui_out_chain
);
4897 if (ui_out_is_mi_like_p (uiout
))
4902 printf_filtered (_("Breakpoint %d"), b
->number
);
4905 case bp_hardware_breakpoint
:
4906 if (ui_out_is_mi_like_p (uiout
))
4911 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
4915 case bp_catch_unload
:
4916 printf_filtered (_("Catchpoint %d (%s %s)"),
4918 (b
->type
== bp_catch_load
) ? "load" : "unload",
4919 (b
->dll_pathname
!= NULL
) ?
4920 b
->dll_pathname
: "<any library>");
4923 case bp_catch_vfork
:
4924 printf_filtered (_("Catchpoint %d (%s)"),
4926 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4929 printf_filtered (_("Catchpoint %d (exec)"),
4932 case bp_catch_catch
:
4933 case bp_catch_throw
:
4934 printf_filtered (_("Catchpoint %d (%s)"),
4936 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4942 case bp_longjmp_resume
:
4943 case bp_step_resume
:
4945 case bp_watchpoint_scope
:
4946 case bp_shlib_event
:
4947 case bp_thread_event
:
4948 case bp_overlay_event
:
4954 /* i18n: cagney/2005-02-11: Below needs to be merged into a
4958 printf_filtered (_(" (%s) pending."), b
->addr_string
);
4962 if (addressprint
|| b
->source_file
== NULL
)
4964 printf_filtered (" at ");
4965 deprecated_print_address_numeric (b
->loc
->address
, 1, gdb_stdout
);
4968 printf_filtered (": file %s, line %d.",
4969 b
->source_file
, b
->line_number
);
4972 do_cleanups (old_chain
);
4973 if (ui_out_is_mi_like_p (uiout
))
4975 printf_filtered ("\n");
4979 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4980 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4981 COND[i] and COND_STRING[i] values.
4983 The parameter PENDING_BP points to a pending breakpoint that is
4984 the basis of the breakpoints currently being created. The pending
4985 breakpoint may contain a separate condition string or commands
4986 that were added after the initial pending breakpoint was created.
4988 NOTE: If the function succeeds, the caller is expected to cleanup
4989 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4990 array contents). If the function fails (error() is called), the
4991 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4992 COND and SALS arrays and each of those arrays contents. */
4995 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4996 struct expression
**cond
, char **cond_string
,
4997 enum bptype type
, enum bpdisp disposition
,
4998 int thread
, int ignore_count
, int from_tty
,
4999 struct breakpoint
*pending_bp
)
5001 if (type
== bp_hardware_breakpoint
)
5003 int i
= hw_breakpoint_used_count ();
5004 int target_resources_ok
=
5005 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
5007 if (target_resources_ok
== 0)
5008 error (_("No hardware breakpoint support in the target."));
5009 else if (target_resources_ok
< 0)
5010 error (_("Hardware breakpoints used exceeds limit."));
5013 /* Now set all the breakpoints. */
5016 for (i
= 0; i
< sals
.nelts
; i
++)
5018 struct breakpoint
*b
;
5019 struct symtab_and_line sal
= sals
.sals
[i
];
5022 describe_other_breakpoints (sal
.pc
, sal
.section
, thread
);
5024 b
= set_raw_breakpoint (sal
, type
);
5025 set_breakpoint_count (breakpoint_count
+ 1);
5026 b
->number
= breakpoint_count
;
5030 b
->addr_string
= addr_string
[i
];
5032 /* addr_string has to be used or breakpoint_re_set will delete
5034 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
5035 b
->cond_string
= cond_string
[i
];
5036 b
->ignore_count
= ignore_count
;
5037 b
->enable_state
= bp_enabled
;
5038 b
->disposition
= disposition
;
5039 /* If resolving a pending breakpoint, a check must be made to see if
5040 the user has specified a new condition or commands for the
5041 breakpoint. A new condition will override any condition that was
5042 initially specified with the initial breakpoint command. */
5046 if (pending_bp
->cond_string
)
5048 arg
= pending_bp
->cond_string
;
5049 b
->cond_string
= savestring (arg
, strlen (arg
));
5050 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
5052 error (_("Junk at end of pending breakpoint condition expression"));
5054 /* If there are commands associated with the breakpoint, they should
5056 if (pending_bp
->commands
)
5057 b
->commands
= copy_command_lines (pending_bp
->commands
);
5059 /* We have to copy over the ignore_count and thread as well. */
5060 b
->ignore_count
= pending_bp
->ignore_count
;
5061 b
->thread
= pending_bp
->thread
;
5068 /* Parse ARG which is assumed to be a SAL specification possibly
5069 followed by conditionals. On return, SALS contains an array of SAL
5070 addresses found. ADDR_STRING contains a vector of (canonical)
5071 address strings. ARG points to the end of the SAL. */
5074 parse_breakpoint_sals (char **address
,
5075 struct symtabs_and_lines
*sals
,
5076 char ***addr_string
,
5079 char *addr_start
= *address
;
5080 *addr_string
= NULL
;
5081 /* If no arg given, or if first arg is 'if ', use the default
5083 if ((*address
) == NULL
5084 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
5086 if (default_breakpoint_valid
)
5088 struct symtab_and_line sal
;
5089 init_sal (&sal
); /* initialize to zeroes */
5090 sals
->sals
= (struct symtab_and_line
*)
5091 xmalloc (sizeof (struct symtab_and_line
));
5092 sal
.pc
= default_breakpoint_address
;
5093 sal
.line
= default_breakpoint_line
;
5094 sal
.symtab
= default_breakpoint_symtab
;
5095 sal
.section
= find_pc_overlay (sal
.pc
);
5096 sals
->sals
[0] = sal
;
5100 error (_("No default breakpoint address now."));
5104 /* Force almost all breakpoints to be in terms of the
5105 current_source_symtab (which is decode_line_1's default). This
5106 should produce the results we want almost all of the time while
5107 leaving default_breakpoint_* alone.
5108 ObjC: However, don't match an Objective-C method name which
5109 may have a '+' or '-' succeeded by a '[' */
5111 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5113 if (default_breakpoint_valid
5115 || ((strchr ("+-", (*address
)[0]) != NULL
)
5116 && ((*address
)[1] != '['))))
5117 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5118 default_breakpoint_line
, addr_string
,
5121 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5122 addr_string
, not_found_ptr
);
5124 /* For any SAL that didn't have a canonical string, fill one in. */
5125 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5126 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5127 if (addr_start
!= (*address
))
5130 for (i
= 0; i
< sals
->nelts
; i
++)
5132 /* Add the string if not present. */
5133 if ((*addr_string
)[i
] == NULL
)
5134 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5140 /* Convert each SAL into a real PC. Verify that the PC can be
5141 inserted as a breakpoint. If it can't throw an error. */
5144 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5148 for (i
= 0; i
< sals
->nelts
; i
++)
5150 resolve_sal_pc (&sals
->sals
[i
]);
5152 /* It's possible for the PC to be nonzero, but still an illegal
5153 value on some targets.
5155 For example, on HP-UX if you start gdb, and before running the
5156 inferior you try to set a breakpoint on a shared library function
5157 "foo" where the inferior doesn't call "foo" directly but does
5158 pass its address to another function call, then we do find a
5159 minimal symbol for the "foo", but it's address is invalid.
5160 (Appears to be an index into a table that the loader sets up
5161 when the inferior is run.)
5163 Give the target a chance to bless sals.sals[i].pc before we
5164 try to make a breakpoint for it. */
5165 #ifdef DEPRECATED_PC_REQUIRES_RUN_BEFORE_USE
5166 if (DEPRECATED_PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
5168 if (address
== NULL
)
5169 error (_("Cannot break without a running program."));
5171 error (_("Cannot break on %s without a running program."),
5179 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5181 struct captured_parse_breakpoint_args
*args
= data
;
5183 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5184 args
->not_found_ptr
);
5187 /* Set a breakpoint according to ARG (function, linenum or *address)
5188 flag: first bit : 0 non-temporary, 1 temporary.
5189 second bit : 0 normal breakpoint, 1 hardware breakpoint.
5191 PENDING_BP is non-NULL when this function is being called to resolve
5192 a pending breakpoint. */
5195 break_command_1 (char *arg
, int flag
, int from_tty
, struct breakpoint
*pending_bp
)
5197 struct gdb_exception e
;
5198 int tempflag
, hardwareflag
;
5199 struct symtabs_and_lines sals
;
5200 struct expression
**cond
= 0;
5201 struct symtab_and_line pending_sal
;
5202 char **cond_string
= (char **) NULL
;
5205 char *addr_start
= arg
;
5207 struct cleanup
*old_chain
;
5208 struct cleanup
*breakpoint_chain
= NULL
;
5209 struct captured_parse_breakpoint_args parse_args
;
5213 int ignore_count
= 0;
5216 hardwareflag
= flag
& BP_HARDWAREFLAG
;
5217 tempflag
= flag
& BP_TEMPFLAG
;
5223 parse_args
.arg_p
= &arg
;
5224 parse_args
.sals_p
= &sals
;
5225 parse_args
.addr_string_p
= &addr_string
;
5226 parse_args
.not_found_ptr
= ¬_found
;
5228 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5229 &parse_args
, RETURN_MASK_ALL
);
5231 /* If caller is interested in rc value from parse, set value. */
5235 exception_print (gdb_stderr
, e
);
5240 case NOT_FOUND_ERROR
:
5241 /* If called to resolve pending breakpoint, just return
5246 exception_print (gdb_stderr
, e
);
5248 /* If pending breakpoint support is turned off, throw
5251 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5252 deprecated_throw_reason (RETURN_ERROR
);
5254 /* If pending breakpoint support is auto query and the user
5255 selects no, then simply return the error code. */
5256 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5257 !nquery ("Make breakpoint pending on future shared library load? "))
5260 /* At this point, either the user was queried about setting
5261 a pending breakpoint and selected yes, or pending
5262 breakpoint behavior is on and thus a pending breakpoint
5263 is defaulted on behalf of the user. */
5264 copy_arg
= xstrdup (addr_start
);
5265 addr_string
= ©_arg
;
5267 sals
.sals
= &pending_sal
;
5272 exception_print (gdb_stderr
, e
);
5280 /* Create a chain of things that always need to be cleaned up. */
5281 old_chain
= make_cleanup (null_cleanup
, 0);
5285 /* Make sure that all storage allocated to SALS gets freed. */
5286 make_cleanup (xfree
, sals
.sals
);
5288 /* Cleanup the addr_string array but not its contents. */
5289 make_cleanup (xfree
, addr_string
);
5292 /* Allocate space for all the cond expressions. */
5293 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5294 make_cleanup (xfree
, cond
);
5296 /* Allocate space for all the cond strings. */
5297 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5298 make_cleanup (xfree
, cond_string
);
5300 /* ----------------------------- SNIP -----------------------------
5301 Anything added to the cleanup chain beyond this point is assumed
5302 to be part of a breakpoint. If the breakpoint create succeeds
5303 then the memory is not reclaimed. */
5304 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5306 /* Mark the contents of the addr_string for cleanup. These go on
5307 the breakpoint_chain and only occure if the breakpoint create
5309 for (i
= 0; i
< sals
.nelts
; i
++)
5311 if (addr_string
[i
] != NULL
)
5312 make_cleanup (xfree
, addr_string
[i
]);
5315 /* Resolve all line numbers to PC's and verify that the addresses
5316 are ok for the target. */
5318 breakpoint_sals_to_pc (&sals
, addr_start
);
5320 /* Verify that condition can be parsed, before setting any
5321 breakpoints. Allocate a separate condition expression for each
5323 thread
= -1; /* No specific thread yet */
5326 for (i
= 0; i
< sals
.nelts
; i
++)
5333 char *cond_start
= NULL
;
5334 char *cond_end
= NULL
;
5335 while (*tok
== ' ' || *tok
== '\t')
5340 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5343 toklen
= end_tok
- tok
;
5345 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5347 tok
= cond_start
= end_tok
+ 1;
5348 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
),
5350 make_cleanup (xfree
, cond
[i
]);
5352 cond_string
[i
] = savestring (cond_start
,
5353 cond_end
- cond_start
);
5354 make_cleanup (xfree
, cond_string
[i
]);
5356 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5362 thread
= strtol (tok
, &tok
, 0);
5364 error (_("Junk after thread keyword."));
5365 if (!valid_thread_id (thread
))
5366 error (_("Unknown thread %d."), thread
);
5369 error (_("Junk at end of arguments."));
5372 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5373 hardwareflag
? bp_hardware_breakpoint
5375 tempflag
? disp_del
: disp_donttouch
,
5376 thread
, ignore_count
, from_tty
,
5381 struct symtab_and_line sal
;
5382 struct breakpoint
*b
;
5387 make_cleanup (xfree
, copy_arg
);
5389 b
= set_raw_breakpoint (sal
, hardwareflag
? bp_hardware_breakpoint
5391 set_breakpoint_count (breakpoint_count
+ 1);
5392 b
->number
= breakpoint_count
;
5395 b
->addr_string
= *addr_string
;
5396 b
->cond_string
= *cond_string
;
5397 b
->ignore_count
= ignore_count
;
5399 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5400 b
->from_tty
= from_tty
;
5406 warning (_("Multiple breakpoints were set.\n"
5407 "Use the \"delete\" command to delete unwanted breakpoints."));
5408 /* That's it. Discard the cleanups for data inserted into the
5410 discard_cleanups (breakpoint_chain
);
5411 /* But cleanup everything else. */
5412 do_cleanups (old_chain
);
5417 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
5418 linenum or *address) with COND and IGNORE_COUNT. */
5420 struct captured_breakpoint_args
5431 do_captured_breakpoint (struct ui_out
*uiout
, void *data
)
5433 struct captured_breakpoint_args
*args
= data
;
5434 struct symtabs_and_lines sals
;
5435 struct expression
**cond
;
5436 struct cleanup
*old_chain
;
5437 struct cleanup
*breakpoint_chain
= NULL
;
5444 /* Parse the source and lines spec. Delay check that the expression
5445 didn't contain trailing garbage until after cleanups are in
5449 address_end
= args
->address
;
5451 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
, 0);
5456 /* Create a chain of things at always need to be cleaned up. */
5457 old_chain
= make_cleanup (null_cleanup
, 0);
5459 /* Always have a addr_string array, even if it is empty. */
5460 make_cleanup (xfree
, addr_string
);
5462 /* Make sure that all storage allocated to SALS gets freed. */
5463 make_cleanup (xfree
, sals
.sals
);
5465 /* Allocate space for all the cond expressions. */
5466 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5467 make_cleanup (xfree
, cond
);
5469 /* Allocate space for all the cond strings. */
5470 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5471 make_cleanup (xfree
, cond_string
);
5473 /* ----------------------------- SNIP -----------------------------
5474 Anything added to the cleanup chain beyond this point is assumed
5475 to be part of a breakpoint. If the breakpoint create goes
5476 through then that memory is not cleaned up. */
5477 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5479 /* Mark the contents of the addr_string for cleanup. These go on
5480 the breakpoint_chain and only occure if the breakpoint create
5482 for (i
= 0; i
< sals
.nelts
; i
++)
5484 if (addr_string
[i
] != NULL
)
5485 make_cleanup (xfree
, addr_string
[i
]);
5488 /* Wait until now before checking for garbage at the end of the
5489 address. That way cleanups can take care of freeing any
5491 if (*address_end
!= '\0')
5492 error (_("Garbage %s following breakpoint address"), address_end
);
5494 /* Resolve all line numbers to PC's. */
5495 breakpoint_sals_to_pc (&sals
, args
->address
);
5497 /* Verify that conditions can be parsed, before setting any
5499 for (i
= 0; i
< sals
.nelts
; i
++)
5501 if (args
->condition
!= NULL
)
5503 char *tok
= args
->condition
;
5504 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
5506 error (_("Garbage %s follows condition"), tok
);
5507 make_cleanup (xfree
, cond
[i
]);
5508 cond_string
[i
] = xstrdup (args
->condition
);
5512 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5513 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5514 args
->tempflag
? disp_del
: disp_donttouch
,
5515 args
->thread
, args
->ignore_count
, 0/*from-tty*/,
5516 NULL
/*pending_bp*/);
5518 /* That's it. Discard the cleanups for data inserted into the
5520 discard_cleanups (breakpoint_chain
);
5521 /* But cleanup everything else. */
5522 do_cleanups (old_chain
);
5527 gdb_breakpoint (char *address
, char *condition
,
5528 int hardwareflag
, int tempflag
,
5529 int thread
, int ignore_count
,
5530 char **error_message
)
5532 struct captured_breakpoint_args args
;
5533 args
.address
= address
;
5534 args
.condition
= condition
;
5535 args
.hardwareflag
= hardwareflag
;
5536 args
.tempflag
= tempflag
;
5537 args
.thread
= thread
;
5538 args
.ignore_count
= ignore_count
;
5539 if (catch_exceptions_with_msg (uiout
, do_captured_breakpoint
, &args
,
5540 error_message
, RETURN_MASK_ALL
) < 0)
5547 /* Helper function for break_command_1 and disassemble_command. */
5550 resolve_sal_pc (struct symtab_and_line
*sal
)
5554 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5556 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5557 error (_("No line %d in file \"%s\"."),
5558 sal
->line
, sal
->symtab
->filename
);
5562 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5564 struct blockvector
*bv
;
5569 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5572 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5573 sym
= block_function (b
);
5576 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5577 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5581 /* It really is worthwhile to have the section, so we'll just
5582 have to look harder. This case can be executed if we have
5583 line numbers but no functions (as can happen in assembly
5586 struct minimal_symbol
*msym
;
5588 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5590 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5597 break_command (char *arg
, int from_tty
)
5599 break_command_1 (arg
, 0, from_tty
, NULL
);
5603 tbreak_command (char *arg
, int from_tty
)
5605 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
, NULL
);
5609 hbreak_command (char *arg
, int from_tty
)
5611 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
, NULL
);
5615 thbreak_command (char *arg
, int from_tty
)
5617 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
, NULL
);
5621 stop_command (char *arg
, int from_tty
)
5623 printf_filtered (_("Specify the type of breakpoint to set.\n\
5624 Usage: stop in <function | address>\n\
5625 stop at <line>\n"));
5629 stopin_command (char *arg
, int from_tty
)
5633 if (arg
== (char *) NULL
)
5635 else if (*arg
!= '*')
5640 /* look for a ':'. If this is a line number specification, then
5641 say it is bad, otherwise, it should be an address or
5642 function/method name */
5643 while (*argptr
&& !hasColon
)
5645 hasColon
= (*argptr
== ':');
5650 badInput
= (*argptr
!= ':'); /* Not a class::method */
5652 badInput
= isdigit (*arg
); /* a simple line number */
5656 printf_filtered (_("Usage: stop in <function | address>\n"));
5658 break_command_1 (arg
, 0, from_tty
, NULL
);
5662 stopat_command (char *arg
, int from_tty
)
5666 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5673 /* look for a ':'. If there is a '::' then get out, otherwise
5674 it is probably a line number. */
5675 while (*argptr
&& !hasColon
)
5677 hasColon
= (*argptr
== ':');
5682 badInput
= (*argptr
== ':'); /* we have class::method */
5684 badInput
= !isdigit (*arg
); /* not a line number */
5688 printf_filtered (_("Usage: stop at <line>\n"));
5690 break_command_1 (arg
, 0, from_tty
, NULL
);
5693 /* accessflag: hw_write: watch write,
5694 hw_read: watch read,
5695 hw_access: watch access (read or write) */
5697 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5699 struct breakpoint
*b
;
5700 struct symtab_and_line sal
;
5701 struct expression
*exp
;
5702 struct block
*exp_valid_block
;
5703 struct value
*val
, *mark
;
5704 struct frame_info
*frame
;
5705 struct frame_info
*prev_frame
= NULL
;
5706 char *exp_start
= NULL
;
5707 char *exp_end
= NULL
;
5708 char *tok
, *end_tok
;
5710 char *cond_start
= NULL
;
5711 char *cond_end
= NULL
;
5712 struct expression
*cond
= NULL
;
5713 int i
, other_type_used
, target_resources_ok
= 0;
5714 enum bptype bp_type
;
5717 init_sal (&sal
); /* initialize to zeroes */
5719 /* Parse arguments. */
5720 innermost_block
= NULL
;
5722 exp
= parse_exp_1 (&arg
, 0, 0);
5724 exp_valid_block
= innermost_block
;
5725 mark
= value_mark ();
5726 val
= evaluate_expression (exp
);
5727 release_value (val
);
5728 if (value_lazy (val
))
5729 value_fetch_lazy (val
);
5732 while (*tok
== ' ' || *tok
== '\t')
5736 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5739 toklen
= end_tok
- tok
;
5740 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5742 tok
= cond_start
= end_tok
+ 1;
5743 cond
= parse_exp_1 (&tok
, 0, 0);
5747 error (_("Junk at end of command."));
5749 if (accessflag
== hw_read
)
5750 bp_type
= bp_read_watchpoint
;
5751 else if (accessflag
== hw_access
)
5752 bp_type
= bp_access_watchpoint
;
5754 bp_type
= bp_hardware_watchpoint
;
5756 mem_cnt
= can_use_hardware_watchpoint (val
);
5757 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5758 error (_("Expression cannot be implemented with read/access watchpoint."));
5761 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5762 target_resources_ok
=
5763 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5765 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5766 error (_("Target does not support this type of hardware watchpoint."));
5768 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5769 error (_("Target can only support one kind of HW watchpoint at a time."));
5772 #if defined(HPUXHPPA)
5773 /* On HP-UX if you set a h/w
5774 watchpoint before the "run" command, the inferior dies with a e.g.,
5775 SIGILL once you start it. I initially believed this was due to a
5776 bad interaction between page protection traps and the initial
5777 startup sequence by the dynamic linker.
5779 However, I tried avoiding that by having HP-UX's implementation of
5780 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5781 yet, which forced slow watches before a "run" or "attach", and it
5782 still fails somewhere in the startup code.
5784 Until I figure out what's happening, I'm disallowing watches altogether
5785 before the "run" or "attach" command. We'll tell the user they must
5786 set watches after getting the program started. */
5787 if (!target_has_execution
)
5789 warning (_("can't do that without a running program; try \"break main\"), \"run\" first");
5792 #endif /* HPUXHPPA */
5794 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5795 watchpoint could not be set. */
5796 if (!mem_cnt
|| target_resources_ok
<= 0)
5797 bp_type
= bp_watchpoint
;
5799 /* Now set up the breakpoint. */
5800 b
= set_raw_breakpoint (sal
, bp_type
);
5801 set_breakpoint_count (breakpoint_count
+ 1);
5802 b
->number
= breakpoint_count
;
5803 b
->disposition
= disp_donttouch
;
5805 b
->exp_valid_block
= exp_valid_block
;
5806 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5810 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5814 frame
= block_innermost_frame (exp_valid_block
);
5817 prev_frame
= get_prev_frame (frame
);
5818 b
->watchpoint_frame
= get_frame_id (frame
);
5822 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5825 /* If the expression is "local", then set up a "watchpoint scope"
5826 breakpoint at the point where we've left the scope of the watchpoint
5828 if (innermost_block
)
5832 struct breakpoint
*scope_breakpoint
;
5833 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5834 bp_watchpoint_scope
);
5836 scope_breakpoint
->enable_state
= bp_enabled
;
5838 /* Automatically delete the breakpoint when it hits. */
5839 scope_breakpoint
->disposition
= disp_del
;
5841 /* Only break in the proper frame (help with recursion). */
5842 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5844 /* Set the address at which we will stop. */
5845 scope_breakpoint
->loc
->requested_address
5846 = get_frame_pc (prev_frame
);
5847 scope_breakpoint
->loc
->address
5848 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
5849 scope_breakpoint
->type
);
5851 /* The scope breakpoint is related to the watchpoint. We
5852 will need to act on them together. */
5853 b
->related_breakpoint
= scope_breakpoint
;
5856 value_free_to_mark (mark
);
5860 /* Return count of locations need to be watched and can be handled
5861 in hardware. If the watchpoint can not be handled
5862 in hardware return zero. */
5865 can_use_hardware_watchpoint (struct value
*v
)
5867 int found_memory_cnt
= 0;
5868 struct value
*head
= v
;
5870 /* Did the user specifically forbid us to use hardware watchpoints? */
5871 if (!can_use_hw_watchpoints
)
5874 /* Make sure that the value of the expression depends only upon
5875 memory contents, and values computed from them within GDB. If we
5876 find any register references or function calls, we can't use a
5877 hardware watchpoint.
5879 The idea here is that evaluating an expression generates a series
5880 of values, one holding the value of every subexpression. (The
5881 expression a*b+c has five subexpressions: a, b, a*b, c, and
5882 a*b+c.) GDB's values hold almost enough information to establish
5883 the criteria given above --- they identify memory lvalues,
5884 register lvalues, computed values, etcetera. So we can evaluate
5885 the expression, and then scan the chain of values that leaves
5886 behind to decide whether we can detect any possible change to the
5887 expression's final value using only hardware watchpoints.
5889 However, I don't think that the values returned by inferior
5890 function calls are special in any way. So this function may not
5891 notice that an expression involving an inferior function call
5892 can't be watched with hardware watchpoints. FIXME. */
5893 for (; v
; v
= value_next (v
))
5895 if (VALUE_LVAL (v
) == lval_memory
)
5898 /* A lazy memory lvalue is one that GDB never needed to fetch;
5899 we either just used its address (e.g., `a' in `a.b') or
5900 we never needed it at all (e.g., `a' in `a,b'). */
5904 /* Ahh, memory we actually used! Check if we can cover
5905 it with hardware watchpoints. */
5906 struct type
*vtype
= check_typedef (value_type (v
));
5908 /* We only watch structs and arrays if user asked for it
5909 explicitly, never if they just happen to appear in a
5910 middle of some value chain. */
5912 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5913 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5915 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
5916 int len
= TYPE_LENGTH (value_type (v
));
5918 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5925 else if (VALUE_LVAL (v
) != not_lval
5926 && deprecated_value_modifiable (v
) == 0)
5927 return 0; /* ??? What does this represent? */
5928 else if (VALUE_LVAL (v
) == lval_register
)
5929 return 0; /* cannot watch a register with a HW watchpoint */
5932 /* The expression itself looks suitable for using a hardware
5933 watchpoint, but give the target machine a chance to reject it. */
5934 return found_memory_cnt
;
5938 watch_command_wrapper (char *arg
, int from_tty
)
5940 watch_command (arg
, from_tty
);
5944 watch_command (char *arg
, int from_tty
)
5946 watch_command_1 (arg
, hw_write
, from_tty
);
5950 rwatch_command_wrapper (char *arg
, int from_tty
)
5952 rwatch_command (arg
, from_tty
);
5956 rwatch_command (char *arg
, int from_tty
)
5958 watch_command_1 (arg
, hw_read
, from_tty
);
5962 awatch_command_wrapper (char *arg
, int from_tty
)
5964 awatch_command (arg
, from_tty
);
5968 awatch_command (char *arg
, int from_tty
)
5970 watch_command_1 (arg
, hw_access
, from_tty
);
5974 /* Helper routines for the until_command routine in infcmd.c. Here
5975 because it uses the mechanisms of breakpoints. */
5977 /* This function is called by fetch_inferior_event via the
5978 cmd_continuation pointer, to complete the until command. It takes
5979 care of cleaning up the temporary breakpoints set up by the until
5982 until_break_command_continuation (struct continuation_arg
*arg
)
5984 struct cleanup
*cleanups
;
5986 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5987 do_exec_cleanups (cleanups
);
5991 until_break_command (char *arg
, int from_tty
, int anywhere
)
5993 struct symtabs_and_lines sals
;
5994 struct symtab_and_line sal
;
5995 struct frame_info
*frame
= get_selected_frame (NULL
);
5996 struct frame_info
*prev_frame
= get_prev_frame (frame
);
5997 struct breakpoint
*breakpoint
;
5998 struct cleanup
*old_chain
;
5999 struct continuation_arg
*arg1
;
6002 clear_proceed_status ();
6004 /* Set a breakpoint where the user wants it and at return from
6007 if (default_breakpoint_valid
)
6008 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
6009 default_breakpoint_line
, (char ***) NULL
, NULL
);
6011 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
6012 0, (char ***) NULL
, NULL
);
6014 if (sals
.nelts
!= 1)
6015 error (_("Couldn't get information on specified line."));
6018 xfree (sals
.sals
); /* malloc'd, so freed */
6021 error (_("Junk at end of arguments."));
6023 resolve_sal_pc (&sal
);
6026 /* If the user told us to continue until a specified location,
6027 we don't specify a frame at which we need to stop. */
6028 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
6030 /* Otherwise, specify the current frame, because we want to stop only
6031 at the very same frame. */
6032 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
),
6035 if (!target_can_async_p ())
6036 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
6038 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
6040 /* If we are running asynchronously, and the target supports async
6041 execution, we are not waiting for the target to stop, in the call
6042 tp proceed, below. This means that we cannot delete the
6043 brekpoints until the target has actually stopped. The only place
6044 where we get a chance to do that is in fetch_inferior_event, so
6045 we must set things up for that. */
6047 if (target_can_async_p ())
6049 /* In this case the arg for the continuation is just the point
6050 in the exec_cleanups chain from where to start doing
6051 cleanups, because all the continuation does is the cleanups in
6052 the exec_cleanup_chain. */
6054 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
6056 arg1
->data
.pointer
= old_chain
;
6058 add_continuation (until_break_command_continuation
, arg1
);
6061 /* Keep within the current frame, or in frames called by the current
6065 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6066 sal
.pc
= get_frame_pc (prev_frame
);
6067 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6069 if (!target_can_async_p ())
6070 make_cleanup_delete_breakpoint (breakpoint
);
6072 make_exec_cleanup_delete_breakpoint (breakpoint
);
6075 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6076 /* Do the cleanups now, anly if we are not running asynchronously,
6077 of if we are, but the target is still synchronous. */
6078 if (!target_can_async_p ())
6079 do_cleanups (old_chain
);
6083 ep_skip_leading_whitespace (char **s
)
6085 if ((s
== NULL
) || (*s
== NULL
))
6087 while (isspace (**s
))
6091 /* This function examines a string, and attempts to find a token
6092 that might be an event name in the leading characters. If a
6093 possible match is found, a pointer to the last character of
6094 the token is returned. Else, NULL is returned. */
6097 ep_find_event_name_end (char *arg
)
6100 char *event_name_end
= NULL
;
6102 /* If we could depend upon the presense of strrpbrk, we'd use that... */
6106 /* We break out of the loop when we find a token delimiter.
6107 Basically, we're looking for alphanumerics and underscores;
6108 anything else delimites the token. */
6111 if (!isalnum (*s
) && (*s
!= '_'))
6117 return event_name_end
;
6121 /* This function attempts to parse an optional "if <cond>" clause
6122 from the arg string. If one is not found, it returns NULL.
6124 Else, it returns a pointer to the condition string. (It does not
6125 attempt to evaluate the string against a particular block.) And,
6126 it updates arg to point to the first character following the parsed
6127 if clause in the arg string. */
6130 ep_parse_optional_if_clause (char **arg
)
6134 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6137 /* Skip the "if" keyword. */
6140 /* Skip any extra leading whitespace, and record the start of the
6141 condition string. */
6142 ep_skip_leading_whitespace (arg
);
6145 /* Assume that the condition occupies the remainder of the arg string. */
6146 (*arg
) += strlen (cond_string
);
6151 /* This function attempts to parse an optional filename from the arg
6152 string. If one is not found, it returns NULL.
6154 Else, it returns a pointer to the parsed filename. (This function
6155 makes no attempt to verify that a file of that name exists, or is
6156 accessible.) And, it updates arg to point to the first character
6157 following the parsed filename in the arg string.
6159 Note that clients needing to preserve the returned filename for
6160 future access should copy it to their own buffers. */
6162 ep_parse_optional_filename (char **arg
)
6164 static char filename
[1024];
6169 if ((*arg_p
== '\0') || isspace (*arg_p
))
6187 /* Commands to deal with catching events, such as signals, exceptions,
6188 process start/exit, etc. */
6192 catch_fork
, catch_vfork
6197 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6200 char *cond_string
= NULL
;
6202 ep_skip_leading_whitespace (&arg
);
6204 /* The allowed syntax is:
6206 catch [v]fork if <cond>
6208 First, check if there's an if clause. */
6209 cond_string
= ep_parse_optional_if_clause (&arg
);
6211 if ((*arg
!= '\0') && !isspace (*arg
))
6212 error (_("Junk at end of arguments."));
6214 /* If this target supports it, create a fork or vfork catchpoint
6215 and enable reporting of such events. */
6219 create_fork_event_catchpoint (tempflag
, cond_string
);
6222 create_vfork_event_catchpoint (tempflag
, cond_string
);
6225 error (_("unsupported or unknown fork kind; cannot catch it"));
6231 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6233 char *cond_string
= NULL
;
6235 ep_skip_leading_whitespace (&arg
);
6237 /* The allowed syntax is:
6239 catch exec if <cond>
6241 First, check if there's an if clause. */
6242 cond_string
= ep_parse_optional_if_clause (&arg
);
6244 if ((*arg
!= '\0') && !isspace (*arg
))
6245 error (_("Junk at end of arguments."));
6247 /* If this target supports it, create an exec catchpoint
6248 and enable reporting of such events. */
6249 create_exec_event_catchpoint (tempflag
, cond_string
);
6253 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6255 char *dll_pathname
= NULL
;
6256 char *cond_string
= NULL
;
6258 ep_skip_leading_whitespace (&arg
);
6260 /* The allowed syntax is:
6262 catch load if <cond>
6263 catch load <filename>
6264 catch load <filename> if <cond>
6266 The user is not allowed to specify the <filename> after an
6269 We'll ignore the pathological case of a file named "if".
6271 First, check if there's an if clause. If so, then there
6272 cannot be a filename. */
6273 cond_string
= ep_parse_optional_if_clause (&arg
);
6275 /* If there was an if clause, then there cannot be a filename.
6276 Else, there might be a filename and an if clause. */
6277 if (cond_string
== NULL
)
6279 dll_pathname
= ep_parse_optional_filename (&arg
);
6280 ep_skip_leading_whitespace (&arg
);
6281 cond_string
= ep_parse_optional_if_clause (&arg
);
6284 if ((*arg
!= '\0') && !isspace (*arg
))
6285 error (_("Junk at end of arguments."));
6287 /* Create a load breakpoint that only triggers when a load of
6288 the specified dll (or any dll, if no pathname was specified)
6290 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6291 dll_pathname
, cond_string
);
6295 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6297 char *dll_pathname
= NULL
;
6298 char *cond_string
= NULL
;
6300 ep_skip_leading_whitespace (&arg
);
6302 /* The allowed syntax is:
6304 catch unload if <cond>
6305 catch unload <filename>
6306 catch unload <filename> if <cond>
6308 The user is not allowed to specify the <filename> after an
6311 We'll ignore the pathological case of a file named "if".
6313 First, check if there's an if clause. If so, then there
6314 cannot be a filename. */
6315 cond_string
= ep_parse_optional_if_clause (&arg
);
6317 /* If there was an if clause, then there cannot be a filename.
6318 Else, there might be a filename and an if clause. */
6319 if (cond_string
== NULL
)
6321 dll_pathname
= ep_parse_optional_filename (&arg
);
6322 ep_skip_leading_whitespace (&arg
);
6323 cond_string
= ep_parse_optional_if_clause (&arg
);
6326 if ((*arg
!= '\0') && !isspace (*arg
))
6327 error (_("Junk at end of arguments."));
6329 /* Create an unload breakpoint that only triggers when an unload of
6330 the specified dll (or any dll, if no pathname was specified)
6332 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6333 dll_pathname
, cond_string
);
6336 /* Commands to deal with catching exceptions. */
6338 /* Set a breakpoint at the specified callback routine for an
6339 exception event callback */
6342 create_exception_catchpoint (int tempflag
, char *cond_string
,
6343 enum exception_event_kind ex_event
,
6344 struct symtab_and_line
*sal
)
6346 struct breakpoint
*b
;
6347 int thread
= -1; /* All threads. */
6350 if (!sal
) /* no exception support? */
6355 case EX_EVENT_THROW
:
6356 bptype
= bp_catch_throw
;
6358 case EX_EVENT_CATCH
:
6359 bptype
= bp_catch_catch
;
6361 default: /* error condition */
6362 error (_("Internal error -- invalid catchpoint kind"));
6365 b
= set_raw_breakpoint (*sal
, bptype
);
6366 set_breakpoint_count (breakpoint_count
+ 1);
6367 b
->number
= breakpoint_count
;
6369 b
->cond_string
= (cond_string
== NULL
) ?
6370 NULL
: savestring (cond_string
, strlen (cond_string
));
6372 b
->addr_string
= NULL
;
6373 b
->enable_state
= bp_enabled
;
6374 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6378 static enum print_stop_action
6379 print_exception_catchpoint (struct breakpoint
*b
)
6381 annotate_catchpoint (b
->number
);
6383 if (strstr (b
->addr_string
, "throw") != NULL
)
6384 printf_filtered (_("\nCatchpoint %d (exception thrown)\n"),
6387 printf_filtered (_("\nCatchpoint %d (exception caught)\n"),
6390 return PRINT_SRC_AND_LOC
;
6394 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6399 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6402 *last_addr
= b
->loc
->address
;
6403 if (strstr (b
->addr_string
, "throw") != NULL
)
6404 ui_out_field_string (uiout
, "what", "exception throw");
6406 ui_out_field_string (uiout
, "what", "exception catch");
6410 print_mention_exception_catchpoint (struct breakpoint
*b
)
6412 if (strstr (b
->addr_string
, "throw") != NULL
)
6413 printf_filtered (_("Catchpoint %d (throw)"), b
->number
);
6415 printf_filtered (_("Catchpoint %d (catch)"), b
->number
);
6418 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6419 print_exception_catchpoint
,
6420 print_one_exception_catchpoint
,
6421 print_mention_exception_catchpoint
6425 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6426 enum exception_event_kind ex_event
, int from_tty
)
6428 char *trigger_func_name
, *nameptr
;
6429 struct symtabs_and_lines sals
;
6430 struct breakpoint
*b
;
6432 if (ex_event
== EX_EVENT_CATCH
)
6433 trigger_func_name
= xstrdup ("__cxa_begin_catch");
6435 trigger_func_name
= xstrdup ("__cxa_throw");
6437 nameptr
= trigger_func_name
;
6438 sals
= decode_line_1 (&nameptr
, 1, NULL
, 0, NULL
, NULL
);
6439 if (sals
.nelts
== 0)
6441 xfree (trigger_func_name
);
6445 b
= set_raw_breakpoint (sals
.sals
[0], bp_breakpoint
);
6446 set_breakpoint_count (breakpoint_count
+ 1);
6447 b
->number
= breakpoint_count
;
6449 b
->cond_string
= (cond_string
== NULL
) ?
6450 NULL
: savestring (cond_string
, strlen (cond_string
));
6452 b
->addr_string
= trigger_func_name
;
6453 b
->enable_state
= bp_enabled
;
6454 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6455 b
->ops
= &gnu_v3_exception_catchpoint_ops
;
6462 /* Deal with "catch catch" and "catch throw" commands */
6465 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6466 int tempflag
, int from_tty
)
6468 char *cond_string
= NULL
;
6469 struct symtab_and_line
*sal
= NULL
;
6471 ep_skip_leading_whitespace (&arg
);
6473 cond_string
= ep_parse_optional_if_clause (&arg
);
6475 if ((*arg
!= '\0') && !isspace (*arg
))
6476 error (_("Junk at end of arguments."));
6478 if ((ex_event
!= EX_EVENT_THROW
) &&
6479 (ex_event
!= EX_EVENT_CATCH
))
6480 error (_("Unsupported or unknown exception event; cannot catch it"));
6482 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6485 /* See if we can find a callback routine */
6486 sal
= target_enable_exception_callback (ex_event
, 1);
6490 /* We have callbacks from the runtime system for exceptions.
6491 Set a breakpoint on the sal found, if no errors */
6492 if (sal
!= (struct symtab_and_line
*) -1)
6493 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6495 return; /* something went wrong with setting up callbacks */
6498 warning (_("Unsupported with this platform/compiler combination."));
6501 /* Create a breakpoint struct for Ada exception catchpoints. */
6504 create_ada_exception_breakpoint (struct symtab_and_line sal
,
6508 struct expression
*cond
,
6509 struct breakpoint_ops
*ops
,
6513 struct breakpoint
*b
;
6517 describe_other_breakpoints (sal
.pc
, sal
.section
, -1);
6518 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
6519 version for exception catchpoints, because two catchpoints
6520 used for different exception names will use the same address.
6521 In this case, a "breakpoint ... also set at..." warning is
6522 unproductive. Besides. the warning phrasing is also a bit
6523 inapropriate, we should use the word catchpoint, and tell
6524 the user what type of catchpoint it is. The above is good
6525 enough for now, though. */
6528 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6529 set_breakpoint_count (breakpoint_count
+ 1);
6531 b
->enable_state
= bp_enabled
;
6532 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6533 b
->number
= breakpoint_count
;
6534 b
->ignore_count
= 0;
6536 b
->addr_string
= addr_string
;
6537 b
->language
= language_ada
;
6538 b
->cond_string
= cond_string
;
6539 b
->exp_string
= exp_string
;
6542 b
->from_tty
= from_tty
;
6547 /* Implement the "catch exception" command. */
6550 catch_ada_exception_command (char *arg
, int tempflag
, int from_tty
)
6552 struct symtab_and_line sal
;
6554 char *addr_string
= NULL
;
6555 char *exp_string
= NULL
;
6556 char *cond_string
= NULL
;
6557 struct expression
*cond
= NULL
;
6558 struct breakpoint_ops
*ops
= NULL
;
6560 sal
= ada_decode_exception_location (arg
, &addr_string
, &exp_string
,
6561 &cond_string
, &cond
, &ops
);
6562 create_ada_exception_breakpoint (sal
, addr_string
, exp_string
,
6563 cond_string
, cond
, ops
, tempflag
,
6567 /* Implement the "catch assert" command. */
6570 catch_assert_command (char *arg
, int tempflag
, int from_tty
)
6572 struct symtab_and_line sal
;
6573 char *addr_string
= NULL
;
6574 struct breakpoint_ops
*ops
= NULL
;
6576 sal
= ada_decode_assert_location (arg
, &addr_string
, &ops
);
6577 create_ada_exception_breakpoint (sal
, addr_string
, NULL
, NULL
, NULL
, ops
,
6578 tempflag
, from_tty
);
6581 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6582 inside a catch_errors */
6585 cover_target_enable_exception_callback (void *arg
)
6587 args_for_catchpoint_enable
*args
= arg
;
6588 struct symtab_and_line
*sal
;
6589 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6592 else if (sal
== (struct symtab_and_line
*) -1)
6595 return 1; /*is valid */
6599 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6602 /* The first argument may be an event name, such as "start" or "load".
6603 If so, then handle it as such. If it doesn't match an event name,
6604 then attempt to interpret it as an exception name. (This latter is
6605 the v4.16-and-earlier GDB meaning of the "catch" command.)
6607 First, try to find the bounds of what might be an event name. */
6608 char *arg1_start
= arg
;
6612 if (arg1_start
== NULL
)
6614 /* Old behaviour was to use pre-v-4.16 syntax */
6615 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6617 /* Now, this is not allowed */
6618 error (_("Catch requires an event name."));
6621 arg1_end
= ep_find_event_name_end (arg1_start
);
6622 if (arg1_end
== NULL
)
6623 error (_("catch requires an event"));
6624 arg1_length
= arg1_end
+ 1 - arg1_start
;
6626 /* Try to match what we found against known event names. */
6627 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6629 error (_("Catch of signal not yet implemented"));
6631 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6633 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6634 tempflag
, from_tty
);
6636 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6638 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6639 tempflag
, from_tty
);
6641 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6643 error (_("Catch of thread_start not yet implemented"));
6645 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6647 error (_("Catch of thread_exit not yet implemented"));
6649 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6651 error (_("Catch of thread_join not yet implemented"));
6653 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6655 error (_("Catch of start not yet implemented"));
6657 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6659 error (_("Catch of exit not yet implemented"));
6661 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6663 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6665 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6667 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6669 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6671 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6673 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6675 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6677 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6679 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6681 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6683 error (_("Catch of stop not yet implemented"));
6685 else if (strncmp (arg1_start
, "exception", arg1_length
) == 0)
6687 catch_ada_exception_command (arg1_end
+ 1, tempflag
, from_tty
);
6690 else if (strncmp (arg1_start
, "assert", arg1_length
) == 0)
6692 catch_assert_command (arg1_end
+ 1, tempflag
, from_tty
);
6695 /* This doesn't appear to be an event name */
6699 /* Pre-v.4.16 behaviour was to treat the argument
6700 as the name of an exception */
6701 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6702 /* Now this is not allowed */
6703 error (_("Unknown event kind specified for catch"));
6708 /* Used by the gui, could be made a worker for other things. */
6711 set_breakpoint_sal (struct symtab_and_line sal
)
6713 struct breakpoint
*b
;
6714 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6715 set_breakpoint_count (breakpoint_count
+ 1);
6716 b
->number
= breakpoint_count
;
6723 catch_command (char *arg
, int from_tty
)
6725 catch_command_1 (arg
, 0, from_tty
);
6730 tcatch_command (char *arg
, int from_tty
)
6732 catch_command_1 (arg
, 1, from_tty
);
6735 /* Delete breakpoints by address or line. */
6738 clear_command (char *arg
, int from_tty
)
6740 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6742 struct symtabs_and_lines sals
;
6743 struct symtab_and_line sal
;
6748 sals
= decode_line_spec (arg
, 1);
6753 sals
.sals
= (struct symtab_and_line
*)
6754 xmalloc (sizeof (struct symtab_and_line
));
6755 make_cleanup (xfree
, sals
.sals
);
6756 init_sal (&sal
); /* initialize to zeroes */
6757 sal
.line
= default_breakpoint_line
;
6758 sal
.symtab
= default_breakpoint_symtab
;
6759 sal
.pc
= default_breakpoint_address
;
6760 if (sal
.symtab
== 0)
6761 error (_("No source file specified."));
6769 /* For each line spec given, delete bps which correspond
6770 to it. Do it in two passes, solely to preserve the current
6771 behavior that from_tty is forced true if we delete more than
6775 for (i
= 0; i
< sals
.nelts
; i
++)
6777 /* If exact pc given, clear bpts at that pc.
6778 If line given (pc == 0), clear all bpts on specified line.
6779 If defaulting, clear all bpts on default line
6782 defaulting sal.pc != 0 tests to do
6787 1 0 <can't happen> */
6792 /* Find all matching breakpoints, remove them from the
6793 breakpoint chain, and add them to the 'found' chain. */
6794 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6796 /* Are we going to delete b? */
6797 if (b
->type
!= bp_none
6798 && b
->type
!= bp_watchpoint
6799 && b
->type
!= bp_hardware_watchpoint
6800 && b
->type
!= bp_read_watchpoint
6801 && b
->type
!= bp_access_watchpoint
6802 /* Not if b is a watchpoint of any sort... */
6803 && (((sal
.pc
&& (b
->loc
->address
== sal
.pc
))
6804 && (!section_is_overlay (b
->loc
->section
)
6805 || b
->loc
->section
== sal
.section
))
6806 /* Yes, if sal.pc matches b (modulo overlays). */
6807 || ((default_match
|| (0 == sal
.pc
))
6808 && b
->source_file
!= NULL
6809 && sal
.symtab
!= NULL
6810 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6811 && b
->line_number
== sal
.line
)))
6812 /* Yes, if sal source file and line matches b. */
6814 /* Remove it from breakpoint_chain... */
6815 if (b
== breakpoint_chain
)
6817 /* b is at the head of the list */
6818 breakpoint_chain
= b
->next
;
6822 prev
->next
= b
->next
;
6824 /* And add it to 'found' chain. */
6830 /* Keep b, and keep a pointer to it. */
6835 /* Now go thru the 'found' chain and delete them. */
6839 error (_("No breakpoint at %s."), arg
);
6841 error (_("No breakpoint at this line."));
6845 from_tty
= 1; /* Always report if deleted more than one */
6849 printf_unfiltered (_("Deleted breakpoint "));
6851 printf_unfiltered (_("Deleted breakpoints "));
6853 breakpoints_changed ();
6857 printf_unfiltered ("%d ", found
->number
);
6859 delete_breakpoint (found
);
6863 putchar_unfiltered ('\n');
6866 /* Delete breakpoint in BS if they are `delete' breakpoints and
6867 all breakpoints that are marked for deletion, whether hit or not.
6868 This is called after any breakpoint is hit, or after errors. */
6871 breakpoint_auto_delete (bpstat bs
)
6873 struct breakpoint
*b
, *temp
;
6875 for (; bs
; bs
= bs
->next
)
6876 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6878 delete_breakpoint (bs
->breakpoint_at
);
6880 ALL_BREAKPOINTS_SAFE (b
, temp
)
6882 if (b
->disposition
== disp_del_at_next_stop
)
6883 delete_breakpoint (b
);
6887 /* Delete a breakpoint and clean up all traces of it in the data
6891 delete_breakpoint (struct breakpoint
*bpt
)
6893 struct breakpoint
*b
;
6895 struct bp_location
*loc
;
6897 gdb_assert (bpt
!= NULL
);
6899 /* Has this bp already been deleted? This can happen because multiple
6900 lists can hold pointers to bp's. bpstat lists are especial culprits.
6902 One example of this happening is a watchpoint's scope bp. When the
6903 scope bp triggers, we notice that the watchpoint is out of scope, and
6904 delete it. We also delete its scope bp. But the scope bp is marked
6905 "auto-deleting", and is already on a bpstat. That bpstat is then
6906 checked for auto-deleting bp's, which are deleted.
6908 A real solution to this problem might involve reference counts in bp's,
6909 and/or giving them pointers back to their referencing bpstat's, and
6910 teaching delete_breakpoint to only free a bp's storage when no more
6911 references were extent. A cheaper bandaid was chosen. */
6912 if (bpt
->type
== bp_none
)
6915 if (deprecated_delete_breakpoint_hook
)
6916 deprecated_delete_breakpoint_hook (bpt
);
6917 breakpoint_delete_event (bpt
->number
);
6919 if (bpt
->loc
->inserted
)
6920 remove_breakpoint (bpt
->loc
, mark_inserted
);
6922 free_valchain (bpt
->loc
);
6924 if (breakpoint_chain
== bpt
)
6925 breakpoint_chain
= bpt
->next
;
6927 if (bp_location_chain
== bpt
->loc
)
6928 bp_location_chain
= bpt
->loc
->next
;
6930 /* If we have callback-style exception catchpoints, don't go through
6931 the adjustments to the C++ runtime library etc. if the inferior
6932 isn't actually running. target_enable_exception_callback for a
6933 null target ops vector gives an undesirable error message, so we
6934 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6935 exceptions are supported in this way, it's OK for now. FIXME */
6936 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6938 /* Format possible error msg */
6939 char *message
= xstrprintf ("Error in deleting catchpoint %d:\n",
6941 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
6942 args_for_catchpoint_enable args
;
6943 args
.kind
= bpt
->type
== bp_catch_catch
?
6944 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6946 catch_errors (cover_target_enable_exception_callback
, &args
,
6947 message
, RETURN_MASK_ALL
);
6948 do_cleanups (cleanups
);
6955 b
->next
= bpt
->next
;
6959 ALL_BP_LOCATIONS (loc
)
6960 if (loc
->next
== bpt
->loc
)
6962 loc
->next
= bpt
->loc
->next
;
6966 check_duplicates (bpt
);
6967 /* If this breakpoint was inserted, and there is another breakpoint
6968 at the same address, we need to insert the other breakpoint. */
6969 if (bpt
->loc
->inserted
6970 && bpt
->type
!= bp_hardware_watchpoint
6971 && bpt
->type
!= bp_read_watchpoint
6972 && bpt
->type
!= bp_access_watchpoint
6973 && bpt
->type
!= bp_catch_fork
6974 && bpt
->type
!= bp_catch_vfork
6975 && bpt
->type
!= bp_catch_exec
)
6978 if (b
->loc
->address
== bpt
->loc
->address
6979 && b
->loc
->section
== bpt
->loc
->section
6980 && !b
->loc
->duplicate
6981 && b
->enable_state
!= bp_disabled
6982 && b
->enable_state
!= bp_shlib_disabled
6984 && b
->enable_state
!= bp_call_disabled
)
6988 /* We should never reach this point if there is a permanent
6989 breakpoint at the same address as the one being deleted.
6990 If there is a permanent breakpoint somewhere, it should
6991 always be the only one inserted. */
6992 if (b
->enable_state
== bp_permanent
)
6993 internal_error (__FILE__
, __LINE__
,
6994 _("another breakpoint was inserted on top of "
6995 "a permanent breakpoint"));
6997 memset (&b
->loc
->target_info
, 0, sizeof (b
->loc
->target_info
));
6998 b
->loc
->target_info
.placed_address
= b
->loc
->address
;
6999 if (b
->type
== bp_hardware_breakpoint
)
7000 val
= target_insert_hw_breakpoint (&b
->loc
->target_info
);
7002 val
= target_insert_breakpoint (&b
->loc
->target_info
);
7004 /* If there was an error in the insert, print a message, then stop execution. */
7007 struct ui_file
*tmp_error_stream
= mem_fileopen ();
7008 make_cleanup_ui_file_delete (tmp_error_stream
);
7011 if (b
->type
== bp_hardware_breakpoint
)
7013 fprintf_unfiltered (tmp_error_stream
,
7014 "Cannot insert hardware breakpoint %d.\n"
7015 "You may have requested too many hardware breakpoints.\n",
7020 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
7021 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
7022 deprecated_print_address_numeric (b
->loc
->address
, 1, tmp_error_stream
);
7023 fprintf_filtered (tmp_error_stream
, ": %s.\n",
7024 safe_strerror (val
));
7027 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
7028 target_terminal_ours_for_output ();
7029 error_stream(tmp_error_stream
);
7032 b
->loc
->inserted
= 1;
7036 free_command_lines (&bpt
->commands
);
7039 if (bpt
->cond_string
!= NULL
)
7040 xfree (bpt
->cond_string
);
7041 if (bpt
->addr_string
!= NULL
)
7042 xfree (bpt
->addr_string
);
7043 if (bpt
->exp
!= NULL
)
7045 if (bpt
->exp_string
!= NULL
)
7046 xfree (bpt
->exp_string
);
7047 if (bpt
->val
!= NULL
)
7048 value_free (bpt
->val
);
7049 if (bpt
->source_file
!= NULL
)
7050 xfree (bpt
->source_file
);
7051 if (bpt
->dll_pathname
!= NULL
)
7052 xfree (bpt
->dll_pathname
);
7053 if (bpt
->triggered_dll_pathname
!= NULL
)
7054 xfree (bpt
->triggered_dll_pathname
);
7055 if (bpt
->exec_pathname
!= NULL
)
7056 xfree (bpt
->exec_pathname
);
7058 /* Be sure no bpstat's are pointing at it after it's been freed. */
7059 /* FIXME, how can we find all bpstat's?
7060 We just check stop_bpstat for now. Note that we cannot just
7061 remove bpstats pointing at bpt from the stop_bpstat list
7062 entirely, as breakpoint commands are associated with the bpstat;
7063 if we remove it here, then the later call to
7064 bpstat_do_actions (&stop_bpstat);
7065 in event-top.c won't do anything, and temporary breakpoints
7066 with commands won't work. */
7067 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
7068 if (bs
->breakpoint_at
== bpt
)
7070 bs
->breakpoint_at
= NULL
;
7072 /* bs->commands will be freed later. */
7074 /* On the chance that someone will soon try again to delete this same
7075 bp, we mark it as deleted before freeing its storage. */
7076 bpt
->type
= bp_none
;
7083 do_delete_breakpoint_cleanup (void *b
)
7085 delete_breakpoint (b
);
7089 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7091 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7095 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
7097 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
7101 delete_command (char *arg
, int from_tty
)
7103 struct breakpoint
*b
, *temp
;
7109 int breaks_to_delete
= 0;
7111 /* Delete all breakpoints if no argument.
7112 Do not delete internal or call-dummy breakpoints, these
7113 have to be deleted with an explicit breakpoint number argument. */
7116 if (b
->type
!= bp_call_dummy
&&
7117 b
->type
!= bp_shlib_event
&&
7118 b
->type
!= bp_thread_event
&&
7119 b
->type
!= bp_overlay_event
&&
7122 breaks_to_delete
= 1;
7127 /* Ask user only if there are some breakpoints to delete. */
7129 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
7131 ALL_BREAKPOINTS_SAFE (b
, temp
)
7133 if (b
->type
!= bp_call_dummy
&&
7134 b
->type
!= bp_shlib_event
&&
7135 b
->type
!= bp_thread_event
&&
7136 b
->type
!= bp_overlay_event
&&
7138 delete_breakpoint (b
);
7143 map_breakpoint_numbers (arg
, delete_breakpoint
);
7146 /* Reset a breakpoint given it's struct breakpoint * BINT.
7147 The value we return ends up being the return value from catch_errors.
7148 Unused in this case. */
7151 breakpoint_re_set_one (void *bint
)
7153 /* get past catch_errs */
7154 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7158 int *not_found_ptr
= NULL
;
7159 struct symtabs_and_lines sals
;
7161 enum enable_state save_enable
;
7166 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7170 case bp_hardware_breakpoint
:
7172 case bp_catch_unload
:
7173 if (b
->addr_string
== NULL
)
7175 /* Anything without a string can't be re-set. */
7176 delete_breakpoint (b
);
7179 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
7181 ``And a hack it is, although Apple's Darwin version of GDB
7182 contains an almost identical hack to implement a "future
7183 break" command. It seems to work in many real world cases,
7184 but it is easy to come up with a test case where the patch
7185 doesn't help at all.''
7187 ``It seems that the way GDB implements breakpoints - in -
7188 shared - libraries was designed for a.out shared library
7189 systems (SunOS 4) where shared libraries were loaded at a
7190 fixed address in memory. Since ELF shared libraries can (and
7191 will) be loaded at any address in memory, things break.
7192 Fixing this is not trivial. Therefore, I'm not sure whether
7193 we should add this hack to the branch only. I cannot
7194 guarantee that things will be fixed on the trunk in the near
7197 In case we have a problem, disable this breakpoint. We'll
7198 restore its status if we succeed. Don't disable a
7199 shlib_disabled breakpoint though. There's a fair chance we
7200 can't re-set it if the shared library it's in hasn't been
7206 save_enable
= b
->enable_state
;
7207 if (b
->enable_state
!= bp_shlib_disabled
)
7208 b
->enable_state
= bp_disabled
;
7210 /* If resetting a shlib-disabled breakpoint, we don't want to
7211 see an error message if it is not found since we will expect
7212 this to occur until the shared library is finally reloaded.
7213 We accomplish this by giving decode_line_1 a pointer to use
7214 for silent notification that the symbol is not found. */
7215 not_found_ptr
= ¬_found
;
7217 set_language (b
->language
);
7218 input_radix
= b
->input_radix
;
7220 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7222 for (i
= 0; i
< sals
.nelts
; i
++)
7224 resolve_sal_pc (&sals
.sals
[i
]);
7226 /* Reparse conditions, they might contain references to the
7228 if (b
->cond_string
!= NULL
)
7234 /* Avoid re-freeing b->exp if an error during the call
7238 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
7241 /* We need to re-set the breakpoint if the address changes... */
7242 if (b
->loc
->address
!= sals
.sals
[i
].pc
7243 /* ...or new and old breakpoints both have source files, and
7244 the source file name or the line number changes... */
7245 || (b
->source_file
!= NULL
7246 && sals
.sals
[i
].symtab
!= NULL
7247 && (strcmp (b
->source_file
, sals
.sals
[i
].symtab
->filename
) != 0
7248 || b
->line_number
!= sals
.sals
[i
].line
)
7250 /* ...or we switch between having a source file and not having
7252 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
7255 if (b
->source_file
!= NULL
)
7256 xfree (b
->source_file
);
7257 if (sals
.sals
[i
].symtab
== NULL
)
7258 b
->source_file
= NULL
;
7261 savestring (sals
.sals
[i
].symtab
->filename
,
7262 strlen (sals
.sals
[i
].symtab
->filename
));
7263 b
->line_number
= sals
.sals
[i
].line
;
7264 b
->loc
->requested_address
= sals
.sals
[i
].pc
;
7266 = adjust_breakpoint_address (b
->loc
->requested_address
,
7269 /* Used to check for duplicates here, but that can
7270 cause trouble, as it doesn't check for disabled
7275 /* Might be better to do this just once per breakpoint_re_set,
7276 rather than once for every breakpoint. */
7277 breakpoints_changed ();
7279 b
->loc
->section
= sals
.sals
[i
].section
;
7280 b
->enable_state
= save_enable
; /* Restore it, this worked. */
7283 /* Now that this is re-enabled, check_duplicates
7285 check_duplicates (b
);
7292 case bp_hardware_watchpoint
:
7293 case bp_read_watchpoint
:
7294 case bp_access_watchpoint
:
7295 innermost_block
= NULL
;
7296 /* The issue arises of what context to evaluate this in. The
7297 same one as when it was set, but what does that mean when
7298 symbols have been re-read? We could save the filename and
7299 functionname, but if the context is more local than that, the
7300 best we could do would be something like how many levels deep
7301 and which index at that particular level, but that's going to
7302 be less stable than filenames or function names. */
7304 /* So for now, just use a global context. */
7308 /* Avoid re-freeing b->exp if an error during the call to
7309 parse_expression. */
7312 b
->exp
= parse_expression (b
->exp_string
);
7313 b
->exp_valid_block
= innermost_block
;
7314 mark
= value_mark ();
7317 value_free (b
->val
);
7318 /* Avoid re-freeing b->val if an error during the call to
7319 evaluate_expression. */
7322 b
->val
= evaluate_expression (b
->exp
);
7323 release_value (b
->val
);
7324 if (value_lazy (b
->val
) && breakpoint_enabled (b
))
7325 value_fetch_lazy (b
->val
);
7327 if (b
->cond_string
!= NULL
)
7333 /* Avoid re-freeing b->exp if an error during the call
7337 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7339 if (breakpoint_enabled (b
))
7341 value_free_to_mark (mark
);
7343 case bp_catch_catch
:
7344 case bp_catch_throw
:
7346 /* We needn't really do anything to reset these, since the mask
7347 that requests them is unaffected by e.g., new libraries being
7350 case bp_catch_vfork
:
7355 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b
->type
);
7357 /* Delete longjmp and overlay event breakpoints; they will be
7358 reset later by breakpoint_re_set. */
7360 case bp_longjmp_resume
:
7361 case bp_overlay_event
:
7362 delete_breakpoint (b
);
7365 /* This breakpoint is special, it's set up when the inferior
7366 starts and we really don't want to touch it. */
7367 case bp_shlib_event
:
7369 /* Like bp_shlib_event, this breakpoint type is special.
7370 Once it is set up, we do not want to touch it. */
7371 case bp_thread_event
:
7373 /* Keep temporary breakpoints, which can be encountered when we step
7374 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7375 Otherwise these should have been blown away via the cleanup chain
7376 or by breakpoint_init_inferior when we rerun the executable. */
7379 case bp_watchpoint_scope
:
7381 case bp_step_resume
:
7388 /* Re-set all breakpoints after symbols have been re-loaded. */
7390 breakpoint_re_set (void)
7392 struct breakpoint
*b
, *temp
;
7393 enum language save_language
;
7394 int save_input_radix
;
7396 save_language
= current_language
->la_language
;
7397 save_input_radix
= input_radix
;
7398 ALL_BREAKPOINTS_SAFE (b
, temp
)
7400 /* Format possible error msg */
7401 char *message
= xstrprintf ("Error in re-setting breakpoint %d:\n",
7403 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7404 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7405 do_cleanups (cleanups
);
7407 set_language (save_language
);
7408 input_radix
= save_input_radix
;
7410 if (gdbarch_get_longjmp_target_p (current_gdbarch
))
7412 create_longjmp_breakpoint ("longjmp");
7413 create_longjmp_breakpoint ("_longjmp");
7414 create_longjmp_breakpoint ("siglongjmp");
7415 create_longjmp_breakpoint ("_siglongjmp");
7416 create_longjmp_breakpoint (NULL
);
7419 create_overlay_event_breakpoint ("_ovly_debug_event");
7422 /* Reset the thread number of this breakpoint:
7424 - If the breakpoint is for all threads, leave it as-is.
7425 - Else, reset it to the current thread for inferior_ptid. */
7427 breakpoint_re_set_thread (struct breakpoint
*b
)
7429 if (b
->thread
!= -1)
7431 if (in_thread_list (inferior_ptid
))
7432 b
->thread
= pid_to_thread_id (inferior_ptid
);
7436 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7437 If from_tty is nonzero, it prints a message to that effect,
7438 which ends with a period (no newline). */
7441 set_ignore_count (int bptnum
, int count
, int from_tty
)
7443 struct breakpoint
*b
;
7449 if (b
->number
== bptnum
)
7451 b
->ignore_count
= count
;
7455 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7457 else if (count
== 1)
7458 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7461 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7464 breakpoints_changed ();
7465 breakpoint_modify_event (b
->number
);
7469 error (_("No breakpoint number %d."), bptnum
);
7472 /* Clear the ignore counts of all breakpoints. */
7474 breakpoint_clear_ignore_counts (void)
7476 struct breakpoint
*b
;
7479 b
->ignore_count
= 0;
7482 /* Command to set ignore-count of breakpoint N to COUNT. */
7485 ignore_command (char *args
, int from_tty
)
7491 error_no_arg (_("a breakpoint number"));
7493 num
= get_number (&p
);
7495 error (_("bad breakpoint number: '%s'"), args
);
7497 error (_("Second argument (specified ignore-count) is missing."));
7499 set_ignore_count (num
,
7500 longest_to_int (value_as_long (parse_and_eval (p
))),
7503 printf_filtered ("\n");
7506 /* Call FUNCTION on each of the breakpoints
7507 whose numbers are given in ARGS. */
7510 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7515 struct breakpoint
*b
, *tmp
;
7519 error_no_arg (_("one or more breakpoint numbers"));
7526 num
= get_number_or_range (&p1
);
7529 warning (_("bad breakpoint number at or near '%s'"), p
);
7533 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7534 if (b
->number
== num
)
7536 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7539 if (related_breakpoint
)
7540 function (related_breakpoint
);
7544 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
7550 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7551 If from_tty is nonzero, it prints a message to that effect,
7552 which ends with a period (no newline). */
7555 disable_breakpoint (struct breakpoint
*bpt
)
7557 /* Never disable a watchpoint scope breakpoint; we want to
7558 hit them when we leave scope so we can delete both the
7559 watchpoint and its scope breakpoint at that time. */
7560 if (bpt
->type
== bp_watchpoint_scope
)
7563 /* You can't disable permanent breakpoints. */
7564 if (bpt
->enable_state
== bp_permanent
)
7567 bpt
->enable_state
= bp_disabled
;
7569 check_duplicates (bpt
);
7571 if (deprecated_modify_breakpoint_hook
)
7572 deprecated_modify_breakpoint_hook (bpt
);
7573 breakpoint_modify_event (bpt
->number
);
7577 disable_command (char *args
, int from_tty
)
7579 struct breakpoint
*bpt
;
7581 ALL_BREAKPOINTS (bpt
)
7585 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7590 case bp_catch_unload
:
7592 case bp_catch_vfork
:
7594 case bp_catch_catch
:
7595 case bp_catch_throw
:
7596 case bp_hardware_breakpoint
:
7598 case bp_hardware_watchpoint
:
7599 case bp_read_watchpoint
:
7600 case bp_access_watchpoint
:
7601 disable_breakpoint (bpt
);
7606 map_breakpoint_numbers (args
, disable_breakpoint
);
7610 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7612 int target_resources_ok
, other_type_used
;
7615 if (bpt
->type
== bp_hardware_breakpoint
)
7618 i
= hw_breakpoint_used_count ();
7619 target_resources_ok
=
7620 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7622 if (target_resources_ok
== 0)
7623 error (_("No hardware breakpoint support in the target."));
7624 else if (target_resources_ok
< 0)
7625 error (_("Hardware breakpoints used exceeds limit."));
7630 if (bpt
->enable_state
!= bp_enabled
)
7632 /* When enabling a pending breakpoint, we need to check if the breakpoint
7633 is resolvable since shared libraries could have been loaded
7634 after the breakpoint was disabled. */
7635 breakpoints_changed ();
7636 if (resolve_pending_breakpoint (bpt
) == GDB_RC_OK
)
7638 delete_breakpoint (bpt
);
7641 bpt
->enable_state
= bp_enabled
;
7642 bpt
->disposition
= disposition
;
7645 else /* Not a pending breakpoint. */
7647 if (bpt
->enable_state
!= bp_permanent
)
7648 bpt
->enable_state
= bp_enabled
;
7649 bpt
->disposition
= disposition
;
7650 check_duplicates (bpt
);
7651 breakpoints_changed ();
7653 if (bpt
->type
== bp_watchpoint
||
7654 bpt
->type
== bp_hardware_watchpoint
||
7655 bpt
->type
== bp_read_watchpoint
||
7656 bpt
->type
== bp_access_watchpoint
)
7658 struct frame_id saved_frame_id
;
7660 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
7661 if (bpt
->exp_valid_block
!= NULL
)
7663 struct frame_info
*fr
=
7664 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7667 printf_filtered (_("\
7668 Cannot enable watchpoint %d because the block in which its expression\n\
7669 is valid is not currently in scope.\n"), bpt
->number
);
7670 bpt
->enable_state
= bp_disabled
;
7676 value_free (bpt
->val
);
7677 mark
= value_mark ();
7678 bpt
->val
= evaluate_expression (bpt
->exp
);
7679 release_value (bpt
->val
);
7680 if (value_lazy (bpt
->val
))
7681 value_fetch_lazy (bpt
->val
);
7683 if (bpt
->type
== bp_hardware_watchpoint
||
7684 bpt
->type
== bp_read_watchpoint
||
7685 bpt
->type
== bp_access_watchpoint
)
7687 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7688 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7690 /* Hack around 'unused var' error for some targets here */
7691 (void) mem_cnt
, (void) i
;
7692 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7693 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7694 /* we can consider of type is bp_hardware_watchpoint, convert to
7695 bp_watchpoint in the following condition */
7696 if (target_resources_ok
< 0)
7698 printf_filtered (_("\
7699 Cannot enable watchpoint %d because target watch resources\n\
7700 have been allocated for other watchpoints.\n"), bpt
->number
);
7701 bpt
->enable_state
= bp_disabled
;
7702 value_free_to_mark (mark
);
7707 select_frame (frame_find_by_id (saved_frame_id
));
7708 value_free_to_mark (mark
);
7712 if (deprecated_modify_breakpoint_hook
)
7713 deprecated_modify_breakpoint_hook (bpt
);
7714 breakpoint_modify_event (bpt
->number
);
7718 enable_breakpoint (struct breakpoint
*bpt
)
7720 do_enable_breakpoint (bpt
, bpt
->disposition
);
7723 /* The enable command enables the specified breakpoints (or all defined
7724 breakpoints) so they once again become (or continue to be) effective
7725 in stopping the inferior. */
7728 enable_command (char *args
, int from_tty
)
7730 struct breakpoint
*bpt
;
7732 ALL_BREAKPOINTS (bpt
)
7736 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
7741 case bp_catch_unload
:
7743 case bp_catch_vfork
:
7745 case bp_catch_catch
:
7746 case bp_catch_throw
:
7747 case bp_hardware_breakpoint
:
7749 case bp_hardware_watchpoint
:
7750 case bp_read_watchpoint
:
7751 case bp_access_watchpoint
:
7752 enable_breakpoint (bpt
);
7757 map_breakpoint_numbers (args
, enable_breakpoint
);
7761 enable_once_breakpoint (struct breakpoint
*bpt
)
7763 do_enable_breakpoint (bpt
, disp_disable
);
7767 enable_once_command (char *args
, int from_tty
)
7769 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7773 enable_delete_breakpoint (struct breakpoint
*bpt
)
7775 do_enable_breakpoint (bpt
, disp_del
);
7779 enable_delete_command (char *args
, int from_tty
)
7781 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7785 set_breakpoint_cmd (char *args
, int from_tty
)
7790 show_breakpoint_cmd (char *args
, int from_tty
)
7794 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7796 struct symtabs_and_lines
7797 decode_line_spec_1 (char *string
, int funfirstline
)
7799 struct symtabs_and_lines sals
;
7801 error (_("Empty line specification."));
7802 if (default_breakpoint_valid
)
7803 sals
= decode_line_1 (&string
, funfirstline
,
7804 default_breakpoint_symtab
,
7805 default_breakpoint_line
,
7806 (char ***) NULL
, NULL
);
7808 sals
= decode_line_1 (&string
, funfirstline
,
7809 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7811 error (_("Junk at end of line specification: %s"), string
);
7815 /* Create and insert a raw software breakpoint at PC. Return an
7816 identifier, which should be used to remove the breakpoint later.
7817 In general, places which call this should be using something on the
7818 breakpoint chain instead; this function should be eliminated
7822 deprecated_insert_raw_breakpoint (CORE_ADDR pc
)
7824 struct bp_target_info
*bp_tgt
;
7826 bp_tgt
= xmalloc (sizeof (struct bp_target_info
));
7827 memset (bp_tgt
, 0, sizeof (struct bp_target_info
));
7829 bp_tgt
->placed_address
= pc
;
7830 if (target_insert_breakpoint (bp_tgt
) != 0)
7832 /* Could not insert the breakpoint. */
7840 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
7843 deprecated_remove_raw_breakpoint (void *bp
)
7845 struct bp_target_info
*bp_tgt
= bp
;
7848 ret
= target_remove_breakpoint (bp_tgt
);
7854 /* One (or perhaps two) breakpoints used for software single stepping. */
7856 static void *single_step_breakpoints
[2];
7858 /* Create and insert a breakpoint for software single step. */
7861 insert_single_step_breakpoint (CORE_ADDR next_pc
)
7865 if (single_step_breakpoints
[0] == NULL
)
7866 bpt_p
= &single_step_breakpoints
[0];
7869 gdb_assert (single_step_breakpoints
[1] == NULL
);
7870 bpt_p
= &single_step_breakpoints
[1];
7873 /* NOTE drow/2006-04-11: A future improvement to this function would be
7874 to only create the breakpoints once, and actually put them on the
7875 breakpoint chain. That would let us use set_raw_breakpoint. We could
7876 adjust the addresses each time they were needed. Doing this requires
7877 corresponding changes elsewhere where single step breakpoints are
7878 handled, however. So, for now, we use this. */
7880 *bpt_p
= deprecated_insert_raw_breakpoint (next_pc
);
7882 error (_("Could not insert single-step breakpoint at 0x%s"),
7883 paddr_nz (next_pc
));
7886 /* Remove and delete any breakpoints used for software single step. */
7889 remove_single_step_breakpoints (void)
7891 gdb_assert (single_step_breakpoints
[0] != NULL
);
7893 /* See insert_single_step_breakpoint for more about this deprecated
7895 deprecated_remove_raw_breakpoint (single_step_breakpoints
[0]);
7896 single_step_breakpoints
[0] = NULL
;
7898 if (single_step_breakpoints
[1] != NULL
)
7900 deprecated_remove_raw_breakpoint (single_step_breakpoints
[1]);
7901 single_step_breakpoints
[1] = NULL
;
7905 /* Check whether a software single-step breakpoint is inserted at PC. */
7908 single_step_breakpoint_inserted_here_p (CORE_ADDR pc
)
7912 for (i
= 0; i
< 2; i
++)
7914 struct bp_target_info
*bp_tgt
= single_step_breakpoints
[i
];
7915 if (bp_tgt
&& bp_tgt
->placed_address
== pc
)
7923 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
7924 It is defined as a macro to prevent duplication.
7925 COMMAND should be a string constant containing the name of the command. */
7926 #define BREAK_ARGS_HELP(command) \
7927 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
7928 LOCATION may be a line number, function name, or \"*\" and an address.\n\
7929 If a line number is specified, break at start of code for that line.\n\
7930 If a function is specified, break at start of code for that function.\n\
7931 If an address is specified, break at that exact address.\n\
7932 With no LOCATION, uses current execution address of selected stack frame.\n\
7933 This is useful for breaking on return to a stack frame.\n\
7935 THREADNUM is the number from \"info threads\".\n\
7936 CONDITION is a boolean expression.\n\
7938 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7940 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
7943 _initialize_breakpoint (void)
7945 static struct cmd_list_element
*breakpoint_set_cmdlist
;
7946 static struct cmd_list_element
*breakpoint_show_cmdlist
;
7947 struct cmd_list_element
*c
;
7949 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
7951 breakpoint_chain
= 0;
7952 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7953 before a breakpoint is set. */
7954 breakpoint_count
= 0;
7956 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
7957 Set ignore-count of breakpoint number N to COUNT.\n\
7958 Usage is `ignore N COUNT'."));
7960 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7962 add_com ("commands", class_breakpoint
, commands_command
, _("\
7963 Set commands to be executed when a breakpoint is hit.\n\
7964 Give breakpoint number as argument after \"commands\".\n\
7965 With no argument, the targeted breakpoint is the last one set.\n\
7966 The commands themselves follow starting on the next line.\n\
7967 Type a line containing \"end\" to indicate the end of them.\n\
7968 Give \"silent\" as the first line to make the breakpoint silent;\n\
7969 then no output is printed when it is hit, except what the commands print."));
7971 add_com ("condition", class_breakpoint
, condition_command
, _("\
7972 Specify breakpoint number N to break only if COND is true.\n\
7973 Usage is `condition N COND', where N is an integer and COND is an\n\
7974 expression to be evaluated whenever breakpoint N is reached."));
7976 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
7977 Set a temporary breakpoint.\n\
7978 Like \"break\" except the breakpoint is only temporary,\n\
7979 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7980 by using \"enable delete\" on the breakpoint number.\n\
7982 BREAK_ARGS_HELP ("tbreak")));
7983 set_cmd_completer (c
, location_completer
);
7985 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
7986 Set a hardware assisted breakpoint.\n\
7987 Like \"break\" except the breakpoint requires hardware support,\n\
7988 some target hardware may not have this support.\n\
7990 BREAK_ARGS_HELP ("hbreak")));
7991 set_cmd_completer (c
, location_completer
);
7993 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
7994 Set a temporary hardware assisted breakpoint.\n\
7995 Like \"hbreak\" except the breakpoint is only temporary,\n\
7996 so it will be deleted when hit.\n\
7998 BREAK_ARGS_HELP ("thbreak")));
7999 set_cmd_completer (c
, location_completer
);
8001 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
8002 Enable some breakpoints.\n\
8003 Give breakpoint numbers (separated by spaces) as arguments.\n\
8004 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8005 This is used to cancel the effect of the \"disable\" command.\n\
8006 With a subcommand you can enable temporarily."),
8007 &enablelist
, "enable ", 1, &cmdlist
);
8009 add_com ("ab", class_breakpoint
, enable_command
, _("\
8010 Enable some breakpoints.\n\
8011 Give breakpoint numbers (separated by spaces) as arguments.\n\
8012 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8013 This is used to cancel the effect of the \"disable\" command.\n\
8014 With a subcommand you can enable temporarily."));
8016 add_com_alias ("en", "enable", class_breakpoint
, 1);
8018 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
8019 Enable some breakpoints.\n\
8020 Give breakpoint numbers (separated by spaces) as arguments.\n\
8021 This is used to cancel the effect of the \"disable\" command.\n\
8022 May be abbreviated to simply \"enable\".\n"),
8023 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
8025 add_cmd ("once", no_class
, enable_once_command
, _("\
8026 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8027 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8030 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8031 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8032 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8035 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8036 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8037 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8040 add_cmd ("once", no_class
, enable_once_command
, _("\
8041 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8042 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8045 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
8046 Disable some breakpoints.\n\
8047 Arguments are breakpoint numbers with spaces in between.\n\
8048 To disable all breakpoints, give no argument.\n\
8049 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
8050 &disablelist
, "disable ", 1, &cmdlist
);
8051 add_com_alias ("dis", "disable", class_breakpoint
, 1);
8052 add_com_alias ("disa", "disable", class_breakpoint
, 1);
8054 add_com ("sb", class_breakpoint
, disable_command
, _("\
8055 Disable some breakpoints.\n\
8056 Arguments are breakpoint numbers with spaces in between.\n\
8057 To disable all breakpoints, give no argument.\n\
8058 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
8060 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
8061 Disable some breakpoints.\n\
8062 Arguments are breakpoint numbers with spaces in between.\n\
8063 To disable all breakpoints, give no argument.\n\
8064 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
8065 This command may be abbreviated \"disable\"."),
8068 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
8069 Delete some breakpoints or auto-display expressions.\n\
8070 Arguments are breakpoint numbers with spaces in between.\n\
8071 To delete all breakpoints, give no argument.\n\
8073 Also a prefix command for deletion of other GDB objects.\n\
8074 The \"unset\" command is also an alias for \"delete\"."),
8075 &deletelist
, "delete ", 1, &cmdlist
);
8076 add_com_alias ("d", "delete", class_breakpoint
, 1);
8077 add_com_alias ("del", "delete", class_breakpoint
, 1);
8079 add_com ("db", class_breakpoint
, delete_command
, _("\
8080 Delete some breakpoints.\n\
8081 Arguments are breakpoint numbers with spaces in between.\n\
8082 To delete all breakpoints, give no argument.\n"));
8084 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
8085 Delete some breakpoints or auto-display expressions.\n\
8086 Arguments are breakpoint numbers with spaces in between.\n\
8087 To delete all breakpoints, give no argument.\n\
8088 This command may be abbreviated \"delete\"."),
8091 add_com ("clear", class_breakpoint
, clear_command
, _("\
8092 Clear breakpoint at specified line or function.\n\
8093 Argument may be line number, function name, or \"*\" and an address.\n\
8094 If line number is specified, all breakpoints in that line are cleared.\n\
8095 If function is specified, breakpoints at beginning of function are cleared.\n\
8096 If an address is specified, breakpoints at that address are cleared.\n\
8098 With no argument, clears all breakpoints in the line that the selected frame\n\
8101 See also the \"delete\" command which clears breakpoints by number."));
8103 c
= add_com ("break", class_breakpoint
, break_command
, _("\
8104 Set breakpoint at specified line or function.\n"
8105 BREAK_ARGS_HELP ("break")));
8106 set_cmd_completer (c
, location_completer
);
8108 add_com_alias ("b", "break", class_run
, 1);
8109 add_com_alias ("br", "break", class_run
, 1);
8110 add_com_alias ("bre", "break", class_run
, 1);
8111 add_com_alias ("brea", "break", class_run
, 1);
8115 add_com_alias ("ba", "break", class_breakpoint
, 1);
8116 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
8121 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
8122 Break in function/address or break at a line in the current file."),
8123 &stoplist
, "stop ", 1, &cmdlist
);
8124 add_cmd ("in", class_breakpoint
, stopin_command
,
8125 _("Break in function or address."), &stoplist
);
8126 add_cmd ("at", class_breakpoint
, stopat_command
,
8127 _("Break at a line in the current file."), &stoplist
);
8128 add_com ("status", class_info
, breakpoints_info
, _("\
8129 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8130 The \"Type\" column indicates one of:\n\
8131 \tbreakpoint - normal breakpoint\n\
8132 \twatchpoint - watchpoint\n\
8133 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8134 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8135 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8136 address and file/line number respectively.\n\
8138 Convenience variable \"$_\" and default examine address for \"x\"\n\
8139 are set to the address of the last breakpoint listed unless the command\n\
8140 is prefixed with \"server \".\n\n\
8141 Convenience variable \"$bpnum\" contains the number of the last\n\
8145 add_info ("breakpoints", breakpoints_info
, _("\
8146 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8147 The \"Type\" column indicates one of:\n\
8148 \tbreakpoint - normal breakpoint\n\
8149 \twatchpoint - watchpoint\n\
8150 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8151 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8152 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8153 address and file/line number respectively.\n\
8155 Convenience variable \"$_\" and default examine address for \"x\"\n\
8156 are set to the address of the last breakpoint listed unless the command\n\
8157 is prefixed with \"server \".\n\n\
8158 Convenience variable \"$bpnum\" contains the number of the last\n\
8162 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
8163 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8164 The \"Type\" column indicates one of:\n\
8165 \tbreakpoint - normal breakpoint\n\
8166 \twatchpoint - watchpoint\n\
8167 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8168 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8169 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8170 address and file/line number respectively.\n\
8172 Convenience variable \"$_\" and default examine address for \"x\"\n\
8173 are set to the address of the last breakpoint listed unless the command\n\
8174 is prefixed with \"server \".\n\n\
8175 Convenience variable \"$bpnum\" contains the number of the last\n\
8178 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
8179 Status of all breakpoints, or breakpoint number NUMBER.\n\
8180 The \"Type\" column indicates one of:\n\
8181 \tbreakpoint - normal breakpoint\n\
8182 \twatchpoint - watchpoint\n\
8183 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8184 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8185 \tuntil - internal breakpoint used by the \"until\" command\n\
8186 \tfinish - internal breakpoint used by the \"finish\" command\n\
8187 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8188 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8189 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8190 address and file/line number respectively.\n\
8192 Convenience variable \"$_\" and default examine address for \"x\"\n\
8193 are set to the address of the last breakpoint listed unless the command\n\
8194 is prefixed with \"server \".\n\n\
8195 Convenience variable \"$bpnum\" contains the number of the last\n\
8197 &maintenanceinfolist
);
8199 add_com ("catch", class_breakpoint
, catch_command
, _("\
8200 Set catchpoints to catch events.\n\
8201 Raised signals may be caught:\n\
8202 \tcatch signal - all signals\n\
8203 \tcatch signal <signame> - a particular signal\n\
8204 Raised exceptions may be caught:\n\
8205 \tcatch throw - all exceptions, when thrown\n\
8206 \tcatch throw <exceptname> - a particular exception, when thrown\n\
8207 \tcatch catch - all exceptions, when caught\n\
8208 \tcatch catch <exceptname> - a particular exception, when caught\n\
8209 Thread or process events may be caught:\n\
8210 \tcatch thread_start - any threads, just after creation\n\
8211 \tcatch thread_exit - any threads, just before expiration\n\
8212 \tcatch thread_join - any threads, just after joins\n\
8213 Process events may be caught:\n\
8214 \tcatch start - any processes, just after creation\n\
8215 \tcatch exit - any processes, just before expiration\n\
8216 \tcatch fork - calls to fork()\n\
8217 \tcatch vfork - calls to vfork()\n\
8218 \tcatch exec - calls to exec()\n\
8219 Dynamically-linked library events may be caught:\n\
8220 \tcatch load - loads of any library\n\
8221 \tcatch load <libname> - loads of a particular library\n\
8222 \tcatch unload - unloads of any library\n\
8223 \tcatch unload <libname> - unloads of a particular library\n\
8224 The act of your program's execution stopping may also be caught:\n\
8226 C++ exceptions may be caught:\n\
8227 \tcatch throw - all exceptions, when thrown\n\
8228 \tcatch catch - all exceptions, when caught\n\
8229 Ada exceptions may be caught:\n\
8230 \tcatch exception - all exceptions, when raised\n\
8231 \tcatch exception <name> - a particular exception, when raised\n\
8232 \tcatch exception unhandled - all unhandled exceptions, when raised\n\
8233 \tcatch assert - all failed assertions, when raised\n\
8235 Do \"help set follow-fork-mode\" for info on debugging your program\n\
8236 after a fork or vfork is caught.\n\n\
8237 Do \"help breakpoints\" for info on other commands dealing with breakpoints."));
8239 add_com ("tcatch", class_breakpoint
, tcatch_command
, _("\
8240 Set temporary catchpoints to catch events.\n\
8241 Args like \"catch\" command.\n\
8242 Like \"catch\" except the catchpoint is only temporary,\n\
8243 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
8244 by using \"enable delete\" on the catchpoint number."));
8246 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
8247 Set a watchpoint for an expression.\n\
8248 A watchpoint stops execution of your program whenever the value of\n\
8249 an expression changes."));
8250 set_cmd_completer (c
, location_completer
);
8252 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
8253 Set a read watchpoint for an expression.\n\
8254 A watchpoint stops execution of your program whenever the value of\n\
8255 an expression is read."));
8256 set_cmd_completer (c
, location_completer
);
8258 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
8259 Set a watchpoint for an expression.\n\
8260 A watchpoint stops execution of your program whenever the value of\n\
8261 an expression is either read or written."));
8262 set_cmd_completer (c
, location_completer
);
8264 add_info ("watchpoints", breakpoints_info
,
8265 _("Synonym for ``info breakpoints''."));
8268 /* XXX: cagney/2005-02-23: This should be a boolean, and should
8269 respond to changes - contrary to the description. */
8270 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
8271 &can_use_hw_watchpoints
, _("\
8272 Set debugger's willingness to use watchpoint hardware."), _("\
8273 Show debugger's willingness to use watchpoint hardware."), _("\
8274 If zero, gdb will not use hardware for new watchpoints, even if\n\
8275 such is available. (However, any hardware watchpoints that were\n\
8276 created before setting this to nonzero, will continue to use watchpoint\n\
8279 show_can_use_hw_watchpoints
,
8280 &setlist
, &showlist
);
8282 can_use_hw_watchpoints
= 1;
8284 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
8285 Breakpoint specific settings\n\
8286 Configure various breakpoint-specific variables such as\n\
8287 pending breakpoint behavior"),
8288 &breakpoint_set_cmdlist
, "set breakpoint ",
8289 0/*allow-unknown*/, &setlist
);
8290 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
8291 Breakpoint specific settings\n\
8292 Configure various breakpoint-specific variables such as\n\
8293 pending breakpoint behavior"),
8294 &breakpoint_show_cmdlist
, "show breakpoint ",
8295 0/*allow-unknown*/, &showlist
);
8297 add_setshow_auto_boolean_cmd ("pending", no_class
,
8298 &pending_break_support
, _("\
8299 Set debugger's behavior regarding pending breakpoints."), _("\
8300 Show debugger's behavior regarding pending breakpoints."), _("\
8301 If on, an unrecognized breakpoint location will cause gdb to create a\n\
8302 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
8303 an error. If auto, an unrecognized breakpoint location results in a\n\
8304 user-query to see if a pending breakpoint should be created."),
8306 show_pending_break_support
,
8307 &breakpoint_set_cmdlist
,
8308 &breakpoint_show_cmdlist
);
8310 pending_break_support
= AUTO_BOOLEAN_AUTO
;
8312 add_setshow_boolean_cmd ("auto-hw", no_class
,
8313 &automatic_hardware_breakpoints
, _("\
8314 Set automatic usage of hardware breakpoints."), _("\
8315 Show automatic usage of hardware breakpoints."), _("\
8316 If set, the debugger will automatically use hardware breakpoints for\n\
8317 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
8318 a warning will be emitted for such breakpoints."),
8320 show_automatic_hardware_breakpoints
,
8321 &breakpoint_set_cmdlist
,
8322 &breakpoint_show_cmdlist
);
8324 automatic_hardware_breakpoints
= 1;