1 /* Everything about breakpoints, for GDB.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
28 #include "breakpoint.h"
30 #include "expression.h"
36 #include "gdbthread.h"
39 #include "gdb_string.h"
46 #include "completer.h"
49 #include "cli/cli-script.h"
51 #include "gdb-events.h"
53 /* Prototypes for local functions. */
55 static void until_break_command_continuation (struct continuation_arg *arg);
57 static void catch_command_1 (char *, int, int);
59 static void enable_delete_command (char *, int);
61 static void enable_delete_breakpoint (struct breakpoint *);
63 static void enable_once_command (char *, int);
65 static void enable_once_breakpoint (struct breakpoint *);
67 static void disable_command (char *, int);
69 static void enable_command (char *, int);
71 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint *));
73 static void ignore_command (char *, int);
75 static int breakpoint_re_set_one (PTR);
77 static void clear_command (char *, int);
79 static void catch_command (char *, int);
81 static void handle_gnu_4_16_catch_command (char *, int, int);
83 static struct symtabs_and_lines get_catch_sals (int);
85 static void watch_command (char *, int);
87 static int can_use_hardware_watchpoint (struct value *);
89 extern void break_at_finish_command (char *, int);
90 extern void break_at_finish_at_depth_command (char *, int);
92 extern void tbreak_at_finish_command (char *, int);
94 static void break_command_1 (char *, int, int);
96 static void mention (struct breakpoint *);
98 struct breakpoint *set_raw_breakpoint (struct symtab_and_line, enum bptype);
100 static void check_duplicates (struct breakpoint *);
102 static void describe_other_breakpoints (CORE_ADDR, asection *);
104 static void breakpoints_info (char *, int);
106 static void breakpoint_1 (int, int);
108 static bpstat bpstat_alloc (struct breakpoint *, bpstat);
110 static int breakpoint_cond_eval (PTR);
112 static void cleanup_executing_breakpoints (PTR);
114 static void commands_command (char *, int);
116 static void condition_command (char *, int);
118 static int get_number_trailer (char **, int);
120 void set_breakpoint_count (int);
129 static int remove_breakpoint (struct breakpoint *, insertion_state_t);
131 static enum print_stop_action print_it_typical (bpstat);
133 static enum print_stop_action print_bp_stop_message (bpstat bs);
137 enum exception_event_kind kind;
140 args_for_catchpoint_enable;
142 static int watchpoint_check (PTR);
144 static int cover_target_enable_exception_callback (PTR);
146 static void maintenance_info_breakpoints (char *, int);
148 static void create_longjmp_breakpoint (char *);
150 static void create_overlay_event_breakpoint (char *);
152 static int hw_breakpoint_used_count (void);
154 static int hw_watchpoint_used_count (enum bptype, int *);
156 static void hbreak_command (char *, int);
158 static void thbreak_command (char *, int);
160 static void watch_command_1 (char *, int, int);
162 static void rwatch_command (char *, int);
164 static void awatch_command (char *, int);
166 static void do_enable_breakpoint (struct breakpoint *, enum bpdisp);
168 static void solib_load_unload_1 (char *hookname,
171 char *cond_string, enum bptype bp_kind);
173 static void create_fork_vfork_event_catchpoint (int tempflag,
175 enum bptype bp_kind);
177 static void break_at_finish_at_depth_command_1 (char *arg,
178 int flag, int from_tty);
180 static void break_at_finish_command_1 (char *arg, int flag, int from_tty);
182 static void stop_command (char *arg, int from_tty);
184 static void stopin_command (char *arg, int from_tty);
186 static void stopat_command (char *arg, int from_tty);
188 static char *ep_find_event_name_end (char *arg);
190 static char *ep_parse_optional_if_clause (char **arg);
192 static char *ep_parse_optional_filename (char **arg);
194 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
195 static void catch_exec_command_1 (char *arg, int tempflag, int from_tty);
198 static void create_exception_catchpoint (int tempflag, char *cond_string,
199 enum exception_event_kind ex_event,
200 struct symtab_and_line *sal);
202 static void catch_exception_command_1 (enum exception_event_kind ex_event,
203 char *arg, int tempflag, int from_tty);
205 static void tcatch_command (char *arg, int from_tty);
207 static void ep_skip_leading_whitespace (char **s);
209 /* Prototypes for exported functions. */
211 /* If FALSE, gdb will not use hardware support for watchpoints, even
212 if such is available. */
213 static int can_use_hw_watchpoints;
215 void _initialize_breakpoint (void);
217 extern int addressprint; /* Print machine addresses? */
219 /* Are we executing breakpoint commands? */
220 static int executing_breakpoint_commands;
222 /* Are overlay event breakpoints enabled? */
223 static int overlay_events_enabled;
225 /* Walk the following statement or block through all breakpoints.
226 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
229 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
231 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
232 for (B = breakpoint_chain; \
233 B ? (TMP=B->next, 1): 0; \
236 /* True if SHIFT_INST_REGS defined, false otherwise. */
238 int must_shift_inst_regs =
239 #if defined(SHIFT_INST_REGS)
246 /* True if breakpoint hit counts should be displayed in breakpoint info. */
248 int show_breakpoint_hit_counts = 1;
250 /* Chain of all breakpoints defined. */
252 struct breakpoint *breakpoint_chain;
254 /* Number of last breakpoint made. */
256 int breakpoint_count;
258 /* Pointer to current exception event record */
259 static struct exception_event_record *current_exception_event;
261 /* Indicator of whether exception catchpoints should be nuked
262 between runs of a program */
263 int exception_catchpoints_are_fragile = 0;
265 /* Indicator of when exception catchpoints set-up should be
266 reinitialized -- e.g. when program is re-run */
267 int exception_support_initialized = 0;
269 /* This function returns a pointer to the string representation of the
270 pathname of the dynamically-linked library that has just been
273 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
274 or undefined results are guaranteed.
276 This string's contents are only valid immediately after the
277 inferior has stopped in the dynamic linker hook, and becomes
278 invalid as soon as the inferior is continued. Clients should make
279 a copy of this string if they wish to continue the inferior and
280 then access the string. */
282 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
283 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
286 /* This function returns a pointer to the string representation of the
287 pathname of the dynamically-linked library that has just been
290 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
291 TRUE, or undefined results are guaranteed.
293 This string's contents are only valid immediately after the
294 inferior has stopped in the dynamic linker hook, and becomes
295 invalid as soon as the inferior is continued. Clients should make
296 a copy of this string if they wish to continue the inferior and
297 then access the string. */
299 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
300 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
303 /* This function is called by the "catch load" command. It allows the
304 debugger to be notified by the dynamic linker when a specified
305 library file (or any library file, if filename is NULL) is loaded. */
307 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
308 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
309 error ("catch of library loads not yet implemented on this platform")
312 /* This function is called by the "catch unload" command. It allows
313 the debugger to be notified by the dynamic linker when a specified
314 library file (or any library file, if filename is NULL) is
317 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
318 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
319 error ("catch of library unloads not yet implemented on this platform")
322 /* Set breakpoint count to NUM. */
325 set_breakpoint_count (int num)
327 breakpoint_count = num;
328 set_internalvar (lookup_internalvar ("bpnum"),
329 value_from_longest (builtin_type_int, (LONGEST) num));
332 /* Used in run_command to zero the hit count when a new run starts. */
335 clear_breakpoint_hit_counts (void)
337 struct breakpoint *b;
343 /* Default address, symtab and line to put a breakpoint at
344 for "break" command with no arg.
345 if default_breakpoint_valid is zero, the other three are
346 not valid, and "break" with no arg is an error.
348 This set by print_stack_frame, which calls set_default_breakpoint. */
350 int default_breakpoint_valid;
351 CORE_ADDR default_breakpoint_address;
352 struct symtab *default_breakpoint_symtab;
353 int default_breakpoint_line;
355 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
356 Advance *PP after the string and any trailing whitespace.
358 Currently the string can either be a number or "$" followed by the name
359 of a convenience variable. Making it an expression wouldn't work well
360 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
362 TRAILER is a character which can be found after the number; most
363 commonly this is `-'. If you don't want a trailer, use \0. */
365 get_number_trailer (char **pp, int trailer)
367 int retval = 0; /* default */
371 /* Empty line means refer to the last breakpoint. */
372 return breakpoint_count;
375 /* Make a copy of the name, so we can null-terminate it
376 to pass to lookup_internalvar(). */
381 while (isalnum (*p) || *p == '_')
383 varname = (char *) alloca (p - start + 1);
384 strncpy (varname, start, p - start);
385 varname[p - start] = '\0';
386 val = value_of_internalvar (lookup_internalvar (varname));
387 if (TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_INT)
388 retval = (int) value_as_long (val);
391 printf_filtered ("Convenience variable must have integer value.\n");
399 while (*p >= '0' && *p <= '9')
402 /* There is no number here. (e.g. "cond a == b"). */
404 /* Skip non-numeric token */
405 while (*p && !isspace((int) *p))
407 /* Return zero, which caller must interpret as error. */
413 if (!(isspace (*p) || *p == '\0' || *p == trailer))
415 /* Trailing junk: return 0 and let caller print error msg. */
416 while (!(isspace (*p) || *p == '\0' || *p == trailer))
427 /* Like get_number_trailer, but don't allow a trailer. */
429 get_number (char **pp)
431 return get_number_trailer (pp, '\0');
434 /* Parse a number or a range.
435 * A number will be of the form handled by get_number.
436 * A range will be of the form <number1> - <number2>, and
437 * will represent all the integers between number1 and number2,
440 * While processing a range, this fuction is called iteratively;
441 * At each call it will return the next value in the range.
443 * At the beginning of parsing a range, the char pointer PP will
444 * be advanced past <number1> and left pointing at the '-' token.
445 * Subsequent calls will not advance the pointer until the range
446 * is completed. The call that completes the range will advance
447 * pointer PP past <number2>.
451 get_number_or_range (char **pp)
453 static int last_retval, end_value;
454 static char *end_ptr;
455 static int in_range = 0;
459 /* Default case: pp is pointing either to a solo number,
460 or to the first number of a range. */
461 last_retval = get_number_trailer (pp, '-');
466 /* This is the start of a range (<number1> - <number2>).
467 Skip the '-', parse and remember the second number,
468 and also remember the end of the final token. */
472 while (isspace ((int) *end_ptr))
473 end_ptr++; /* skip white space */
474 end_value = get_number (temp);
475 if (end_value < last_retval)
477 error ("inverted range");
479 else if (end_value == last_retval)
481 /* degenerate range (number1 == number2). Advance the
482 token pointer so that the range will be treated as a
491 error ("negative value");
494 /* pp points to the '-' that betokens a range. All
495 number-parsing has already been done. Return the next
496 integer value (one greater than the saved previous value).
497 Do not advance the token pointer 'pp' until the end of range
500 if (++last_retval == end_value)
502 /* End of range reached; advance token pointer. */
512 /* condition N EXP -- set break condition of breakpoint N to EXP. */
515 condition_command (char *arg, int from_tty)
517 register struct breakpoint *b;
522 error_no_arg ("breakpoint number");
525 bnum = get_number (&p);
527 error ("Bad breakpoint argument: '%s'", arg);
530 if (b->number == bnum)
537 if (b->cond_string != NULL)
538 xfree (b->cond_string);
543 b->cond_string = NULL;
545 printf_filtered ("Breakpoint %d now unconditional.\n", bnum);
550 /* I don't know if it matters whether this is the string the user
551 typed in or the decompiled expression. */
552 b->cond_string = savestring (arg, strlen (arg));
553 b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0);
555 error ("Junk at end of expression");
557 breakpoints_changed ();
558 breakpoint_modify_event (b->number);
562 error ("No breakpoint number %d.", bnum);
567 commands_command (char *arg, int from_tty)
569 register struct breakpoint *b;
572 struct command_line *l;
574 /* If we allowed this, we would have problems with when to
575 free the storage, if we change the commands currently
578 if (executing_breakpoint_commands)
579 error ("Can't use the \"commands\" command among a breakpoint's commands.");
582 bnum = get_number (&p);
585 error ("Unexpected extra arguments following breakpoint number.");
588 if (b->number == bnum)
592 "Type commands for when breakpoint %d is hit, one per line.",
594 l = read_command_lines (tmpbuf, from_tty);
595 free_command_lines (&b->commands);
597 breakpoints_changed ();
598 breakpoint_modify_event (b->number);
601 error ("No breakpoint number %d.", bnum);
604 /* Like target_read_memory() but if breakpoints are inserted, return
605 the shadow contents instead of the breakpoints themselves.
607 Read "memory data" from whatever target or inferior we have.
608 Returns zero if successful, errno value if not. EIO is used
609 for address out of bounds. If breakpoints are inserted, returns
610 shadow contents, not the breakpoints themselves. From breakpoint.c. */
613 read_memory_nobpt (CORE_ADDR memaddr, char *myaddr, unsigned len)
616 struct breakpoint *b;
617 CORE_ADDR bp_addr = 0;
620 if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
621 /* No breakpoints on this machine. */
622 return target_read_memory (memaddr, myaddr, len);
626 if (b->type == bp_none)
627 warning ("reading through apparently deleted breakpoint #%d?",
630 /* memory breakpoint? */
631 if (b->type == bp_watchpoint
632 || b->type == bp_hardware_watchpoint
633 || b->type == bp_read_watchpoint
634 || b->type == bp_access_watchpoint)
639 /* Addresses and length of the part of the breakpoint that
641 /* XXXX The m68k, sh and h8300 have different local and remote
642 breakpoint values. BREAKPOINT_FROM_PC still manages to
643 correctly determine the breakpoints memory address and size
644 for these targets. */
645 bp_addr = b->address;
647 if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
652 if (bp_addr + bp_size <= memaddr)
653 /* The breakpoint is entirely before the chunk of memory we
656 if (bp_addr >= memaddr + len)
657 /* The breakpoint is entirely after the chunk of memory we are
660 /* Copy the breakpoint from the shadow contents, and recurse for
661 the things before and after. */
663 /* Offset within shadow_contents. */
666 if (bp_addr < memaddr)
668 /* Only copy the second part of the breakpoint. */
669 bp_size -= memaddr - bp_addr;
670 bptoffset = memaddr - bp_addr;
674 if (bp_addr + bp_size > memaddr + len)
676 /* Only copy the first part of the breakpoint. */
677 bp_size -= (bp_addr + bp_size) - (memaddr + len);
680 memcpy (myaddr + bp_addr - memaddr,
681 b->shadow_contents + bptoffset, bp_size);
683 if (bp_addr > memaddr)
685 /* Copy the section of memory before the breakpoint. */
686 status = read_memory_nobpt (memaddr, myaddr, bp_addr - memaddr);
691 if (bp_addr + bp_size < memaddr + len)
693 /* Copy the section of memory after the breakpoint. */
694 status = read_memory_nobpt (bp_addr + bp_size,
695 myaddr + bp_addr + bp_size - memaddr,
696 memaddr + len - (bp_addr + bp_size));
703 /* Nothing overlaps. Just call read_memory_noerr. */
704 return target_read_memory (memaddr, myaddr, len);
708 /* insert_breakpoints is used when starting or continuing the program.
709 remove_breakpoints is used when the program stops.
710 Both return zero if successful,
711 or an `errno' value if could not write the inferior. */
714 insert_breakpoints (void)
716 register struct breakpoint *b, *temp;
717 int return_val = 0; /* return success code. */
719 int disabled_breaks = 0;
720 int hw_breakpoint_error = 0;
721 #ifdef ONE_PROCESS_WRITETEXT
722 int process_warning = 0;
725 static char message1[] = "Error inserting catchpoint %d:\n";
726 static char message[sizeof (message1) + 30];
728 struct ui_file *tmp_error_stream = mem_fileopen ();
729 make_cleanup_ui_file_delete (tmp_error_stream);
731 /* Explicitly mark the warning -- this will only be printed if
732 there was an error. */
733 fprintf_unfiltered (tmp_error_stream, "Warning:\n");
735 ALL_BREAKPOINTS_SAFE (b, temp)
737 if (b->enable_state == bp_permanent)
738 /* Permanent breakpoints cannot be inserted or removed. */
740 if ((b->type == bp_watchpoint
741 || b->type == bp_hardware_watchpoint
742 || b->type == bp_read_watchpoint
743 || b->type == bp_access_watchpoint) && (!b->val))
746 val = evaluate_expression (b->exp);
748 if (VALUE_LAZY (val))
749 value_fetch_lazy (val);
752 if (b->type != bp_watchpoint
753 && b->type != bp_hardware_watchpoint
754 && b->type != bp_read_watchpoint
755 && b->type != bp_access_watchpoint
756 && b->type != bp_catch_fork
757 && b->type != bp_catch_vfork
758 && b->type != bp_catch_exec
759 && b->type != bp_catch_throw
760 && b->type != bp_catch_catch
761 && b->enable_state != bp_disabled
762 && b->enable_state != bp_shlib_disabled
763 && b->enable_state != bp_call_disabled
767 /* "Normal" instruction breakpoint: either the standard
768 trap-instruction bp (bp_breakpoint), or a
769 bp_hardware_breakpoint. */
771 /* First check to see if we have to handle an overlay. */
772 if (overlay_debugging == ovly_off
773 || b->section == NULL
774 || !(section_is_overlay (b->section)))
776 /* No overlay handling: just set the breakpoint. */
778 if (b->type == bp_hardware_breakpoint)
779 val = target_insert_hw_breakpoint (b->address,
782 val = target_insert_breakpoint (b->address, b->shadow_contents);
786 /* This breakpoint is in an overlay section.
787 Shall we set a breakpoint at the LMA? */
788 if (!overlay_events_enabled)
790 /* Yes -- overlay event support is not active,
791 so we must try to set a breakpoint at the LMA.
792 This will not work for a hardware breakpoint. */
793 if (b->type == bp_hardware_breakpoint)
794 warning ("hardware breakpoint %d not supported in overlay!\n",
798 CORE_ADDR addr = overlay_unmapped_address (b->address,
800 /* Set a software (trap) breakpoint at the LMA. */
801 val = target_insert_breakpoint (addr, b->shadow_contents);
803 fprintf_unfiltered (tmp_error_stream,
804 "Overlay breakpoint %d failed: in ROM?",
808 /* Shall we set a breakpoint at the VMA? */
809 if (section_is_mapped (b->section))
811 /* Yes. This overlay section is mapped into memory. */
812 if (b->type == bp_hardware_breakpoint)
813 val = target_insert_hw_breakpoint (b->address,
816 val = target_insert_breakpoint (b->address,
821 /* No. This breakpoint will not be inserted.
822 No error, but do not mark the bp as 'inserted'. */
829 /* Can't set the breakpoint. */
830 #if defined (DISABLE_UNSETTABLE_BREAK)
831 if (DISABLE_UNSETTABLE_BREAK (b->address))
833 /* See also: disable_breakpoints_in_shlibs. */
835 b->enable_state = bp_shlib_disabled;
836 if (!disabled_breaks)
838 fprintf_unfiltered (tmp_error_stream,
839 "Cannot insert breakpoint %d.\n",
841 fprintf_unfiltered (tmp_error_stream,
842 "Temporarily disabling shared library breakpoints:\n");
845 fprintf_unfiltered (tmp_error_stream,
846 "breakpoint #%d\n", b->number);
851 #ifdef ONE_PROCESS_WRITETEXT
854 if (b->type == bp_hardware_breakpoint)
856 hw_breakpoint_error = 1;
857 fprintf_unfiltered (tmp_error_stream,
858 "Cannot insert hardware breakpoint %d.\n",
863 fprintf_unfiltered (tmp_error_stream,
864 "Cannot insert breakpoint %d.\n",
866 fprintf_filtered (tmp_error_stream,
867 "Error accessing memory address ");
868 print_address_numeric (b->address, 1, tmp_error_stream);
869 fprintf_filtered (tmp_error_stream, ": %s.\n",
870 safe_strerror (val));
879 return_val = val; /* remember failure */
881 else if (ep_is_exception_catchpoint (b)
882 && b->enable_state != bp_disabled
883 && b->enable_state != bp_shlib_disabled
884 && b->enable_state != bp_call_disabled
889 /* If we get here, we must have a callback mechanism for exception
890 events -- with g++ style embedded label support, we insert
891 ordinary breakpoints and not catchpoints. */
892 /* Format possible error message */
893 sprintf (message, message1, b->number);
895 val = target_insert_breakpoint (b->address, b->shadow_contents);
898 /* Couldn't set breakpoint for some reason */
899 fprintf_unfiltered (tmp_error_stream,
900 "Cannot insert catchpoint %d; disabling it.\n",
902 fprintf_filtered (tmp_error_stream,
903 "Error accessing memory address ");
904 print_address_numeric (b->address, 1, tmp_error_stream);
905 fprintf_filtered (tmp_error_stream, ": %s.\n",
906 safe_strerror (val));
907 b->enable_state = bp_disabled;
911 /* Bp set, now make sure callbacks are enabled */
913 args_for_catchpoint_enable args;
914 args.kind = b->type == bp_catch_catch ?
915 EX_EVENT_CATCH : EX_EVENT_THROW;
917 val = catch_errors (cover_target_enable_exception_callback,
919 message, RETURN_MASK_ALL);
920 if (val != 0 && val != -1)
924 /* Check if something went wrong; val == 0 can be ignored */
927 /* something went wrong */
928 fprintf_unfiltered (tmp_error_stream,
929 "Cannot insert catchpoint %d; disabling it.\n",
931 b->enable_state = bp_disabled;
936 return_val = val; /* remember failure */
939 else if ((b->type == bp_hardware_watchpoint ||
940 b->type == bp_read_watchpoint ||
941 b->type == bp_access_watchpoint)
942 && b->enable_state == bp_enabled
943 && b->disposition != disp_del_at_next_stop
947 struct frame_info *saved_frame;
948 int saved_level, within_current_scope;
949 struct value *mark = value_mark ();
952 /* Save the current frame and level so we can restore it after
953 evaluating the watchpoint expression on its own frame. */
954 saved_frame = selected_frame;
955 saved_level = frame_relative_level (selected_frame);
957 /* Determine if the watchpoint is within scope. */
958 if (b->exp_valid_block == NULL)
959 within_current_scope = 1;
962 struct frame_info *fi;
963 fi = frame_find_by_id (b->watchpoint_frame);
964 within_current_scope = (fi != NULL);
965 if (within_current_scope)
969 if (within_current_scope)
971 /* Evaluate the expression and cut the chain of values
972 produced off from the value chain.
974 Make sure the value returned isn't lazy; we use
975 laziness to determine what memory GDB actually needed
976 in order to compute the value of the expression. */
977 v = evaluate_expression (b->exp);
979 value_release_to_mark (mark);
984 /* Look at each value on the value chain. */
985 for (; v; v = v->next)
987 /* If it's a memory location, and GDB actually needed
988 its contents to evaluate the expression, then we
990 if (VALUE_LVAL (v) == lval_memory
993 struct type *vtype = check_typedef (VALUE_TYPE (v));
995 /* We only watch structs and arrays if user asked
996 for it explicitly, never if they just happen to
997 appear in the middle of some value chain. */
998 if (v == b->val_chain
999 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
1000 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
1005 addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
1006 len = TYPE_LENGTH (VALUE_TYPE (v));
1008 if (b->type == bp_read_watchpoint)
1010 else if (b->type == bp_access_watchpoint)
1013 val = target_insert_watchpoint (addr, len, type);
1016 /* Don't exit the loop, try to insert
1017 every value on the value chain. That's
1018 because we will be removing all the
1019 watches below, and removing a
1020 watchpoint we didn't insert could have
1028 /* Failure to insert a watchpoint on any memory value in the
1029 value chain brings us here. */
1032 remove_breakpoint (b, mark_uninserted);
1033 hw_breakpoint_error = 1;
1034 fprintf_unfiltered (tmp_error_stream,
1035 "Could not insert hardware watchpoint %d.\n",
1042 printf_filtered ("Hardware watchpoint %d deleted ", b->number);
1043 printf_filtered ("because the program has left the block \n");
1044 printf_filtered ("in which its expression is valid.\n");
1045 if (b->related_breakpoint)
1046 b->related_breakpoint->disposition = disp_del_at_next_stop;
1047 b->disposition = disp_del_at_next_stop;
1050 /* Restore the frame and level. */
1051 if ((saved_frame != selected_frame) ||
1052 (saved_level != frame_relative_level (selected_frame)))
1053 select_frame (saved_frame);
1056 return_val = val; /* remember failure */
1058 else if ((b->type == bp_catch_fork
1059 || b->type == bp_catch_vfork
1060 || b->type == bp_catch_exec)
1061 && b->enable_state == bp_enabled
1069 val = target_insert_fork_catchpoint (PIDGET (inferior_ptid));
1071 case bp_catch_vfork:
1072 val = target_insert_vfork_catchpoint (PIDGET (inferior_ptid));
1075 val = target_insert_exec_catchpoint (PIDGET (inferior_ptid));
1078 warning ("Internal error, %s line %d.", __FILE__, __LINE__);
1083 fprintf_unfiltered (tmp_error_stream,
1084 "Cannot insert catchpoint %d.", b->number);
1090 return_val = val; /* remember failure */
1096 /* If a hardware breakpoint or watchpoint was inserted, add a
1097 message about possibly exhausted resources. */
1098 if (hw_breakpoint_error)
1100 fprintf_unfiltered (tmp_error_stream,
1101 "Could not insert hardware breakpoints:\n\
1102 You may have requested too many hardware breakpoints/watchpoints.\n");
1104 #ifdef ONE_PROCESS_WRITETEXT
1105 if (process_warning)
1106 fprintf_unfiltered (tmp_error_stream,
1107 "The same program may be running in another process.");
1109 target_terminal_ours_for_output ();
1110 error_stream (tmp_error_stream);
1116 remove_breakpoints (void)
1118 register struct breakpoint *b;
1125 val = remove_breakpoint (b, mark_uninserted);
1134 remove_hw_watchpoints (void)
1136 register struct breakpoint *b;
1142 && (b->type == bp_hardware_watchpoint
1143 || b->type == bp_read_watchpoint
1144 || b->type == bp_access_watchpoint))
1146 val = remove_breakpoint (b, mark_uninserted);
1155 reattach_breakpoints (int pid)
1157 register struct breakpoint *b;
1159 struct cleanup *old_chain = save_inferior_ptid ();
1161 /* Set inferior_ptid; remove_breakpoint uses this global. */
1162 inferior_ptid = pid_to_ptid (pid);
1167 remove_breakpoint (b, mark_inserted);
1168 if (b->type == bp_hardware_breakpoint)
1169 val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
1171 val = target_insert_breakpoint (b->address, b->shadow_contents);
1174 do_cleanups (old_chain);
1179 do_cleanups (old_chain);
1184 update_breakpoints_after_exec (void)
1186 struct breakpoint *b;
1187 struct breakpoint *temp;
1189 /* Doing this first prevents the badness of having delete_breakpoint()
1190 write a breakpoint's current "shadow contents" to lift the bp. That
1191 shadow is NOT valid after an exec()! */
1192 mark_breakpoints_out ();
1194 ALL_BREAKPOINTS_SAFE (b, temp)
1196 /* Solib breakpoints must be explicitly reset after an exec(). */
1197 if (b->type == bp_shlib_event)
1199 delete_breakpoint (b);
1203 /* Thread event breakpoints must be set anew after an exec(),
1204 as must overlay event breakpoints. */
1205 if (b->type == bp_thread_event || b->type == bp_overlay_event)
1207 delete_breakpoint (b);
1211 /* Step-resume breakpoints are meaningless after an exec(). */
1212 if (b->type == bp_step_resume)
1214 delete_breakpoint (b);
1218 /* Ditto the sigtramp handler breakpoints. */
1219 if (b->type == bp_through_sigtramp)
1221 delete_breakpoint (b);
1225 /* Ditto the exception-handling catchpoints. */
1226 if ((b->type == bp_catch_catch) || (b->type == bp_catch_throw))
1228 delete_breakpoint (b);
1232 /* Don't delete an exec catchpoint, because else the inferior
1233 won't stop when it ought!
1235 Similarly, we probably ought to keep vfork catchpoints, 'cause
1236 on this target, we may not be able to stop when the vfork is
1237 seen, but only when the subsequent exec is seen. (And because
1238 deleting fork catchpoints here but not vfork catchpoints will
1239 seem mysterious to users, keep those too.)
1241 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1242 target address field, if any, is sufficient to have it be reset
1243 automagically. Certainly on HP-UX that's true.
1245 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1246 valid code address on some platforms (like the mn10200 and
1247 mn10300 simulators). We shouldn't assign any special
1248 interpretation to a breakpoint with a zero address. And in
1249 fact, GDB doesn't --- I can't see what that comment above is
1250 talking about. As far as I can tell, setting the address of a
1251 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1252 is meaningless, since those are implemented with HP-UX kernel
1253 hackery, not by storing breakpoint instructions somewhere. */
1254 if ((b->type == bp_catch_exec) ||
1255 (b->type == bp_catch_vfork) ||
1256 (b->type == bp_catch_fork))
1258 b->address = (CORE_ADDR) NULL;
1262 /* bp_finish is a special case. The only way we ought to be able
1263 to see one of these when an exec() has happened, is if the user
1264 caught a vfork, and then said "finish". Ordinarily a finish just
1265 carries them to the call-site of the current callee, by setting
1266 a temporary bp there and resuming. But in this case, the finish
1267 will carry them entirely through the vfork & exec.
1269 We don't want to allow a bp_finish to remain inserted now. But
1270 we can't safely delete it, 'cause finish_command has a handle to
1271 the bp on a bpstat, and will later want to delete it. There's a
1272 chance (and I've seen it happen) that if we delete the bp_finish
1273 here, that its storage will get reused by the time finish_command
1274 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1275 We really must allow finish_command to delete a bp_finish.
1277 In the absense of a general solution for the "how do we know
1278 it's safe to delete something others may have handles to?"
1279 problem, what we'll do here is just uninsert the bp_finish, and
1280 let finish_command delete it.
1282 (We know the bp_finish is "doomed" in the sense that it's
1283 momentary, and will be deleted as soon as finish_command sees
1284 the inferior stopped. So it doesn't matter that the bp's
1285 address is probably bogus in the new a.out, unlike e.g., the
1286 solib breakpoints.) */
1288 if (b->type == bp_finish)
1293 /* Without a symbolic address, we have little hope of the
1294 pre-exec() address meaning the same thing in the post-exec()
1296 if (b->addr_string == NULL)
1298 delete_breakpoint (b);
1302 /* If this breakpoint has survived the above battery of checks, then
1303 it must have a symbolic address. Be sure that it gets reevaluated
1304 to a target address, rather than reusing the old evaluation.
1306 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1307 for bp_catch_exec and friends, I'm pretty sure this is entirely
1308 unnecessary. A call to breakpoint_re_set_one always recomputes
1309 the breakpoint's address from scratch, or deletes it if it can't.
1310 So I think this assignment could be deleted without effect. */
1311 b->address = (CORE_ADDR) NULL;
1313 /* FIXME what about longjmp breakpoints? Re-create them here? */
1314 create_overlay_event_breakpoint ("_ovly_debug_event");
1318 detach_breakpoints (int pid)
1320 register struct breakpoint *b;
1322 struct cleanup *old_chain = save_inferior_ptid ();
1324 if (pid == PIDGET (inferior_ptid))
1325 error ("Cannot detach breakpoints of inferior_ptid");
1327 /* Set inferior_ptid; remove_breakpoint uses this global. */
1328 inferior_ptid = pid_to_ptid (pid);
1333 val = remove_breakpoint (b, mark_inserted);
1336 do_cleanups (old_chain);
1341 do_cleanups (old_chain);
1346 remove_breakpoint (struct breakpoint *b, insertion_state_t is)
1350 if (b->enable_state == bp_permanent)
1351 /* Permanent breakpoints cannot be inserted or removed. */
1354 if (b->type == bp_none)
1355 warning ("attempted to remove apparently deleted breakpoint #%d?",
1358 if (b->type != bp_watchpoint
1359 && b->type != bp_hardware_watchpoint
1360 && b->type != bp_read_watchpoint
1361 && b->type != bp_access_watchpoint
1362 && b->type != bp_catch_fork
1363 && b->type != bp_catch_vfork
1364 && b->type != bp_catch_exec
1365 && b->type != bp_catch_catch
1366 && b->type != bp_catch_throw)
1368 /* "Normal" instruction breakpoint: either the standard
1369 trap-instruction bp (bp_breakpoint), or a
1370 bp_hardware_breakpoint. */
1372 /* First check to see if we have to handle an overlay. */
1373 if (overlay_debugging == ovly_off
1374 || b->section == NULL
1375 || !(section_is_overlay (b->section)))
1377 /* No overlay handling: just remove the breakpoint. */
1379 if (b->type == bp_hardware_breakpoint)
1380 val = target_remove_hw_breakpoint (b->address,
1381 b->shadow_contents);
1383 val = target_remove_breakpoint (b->address, b->shadow_contents);
1387 /* This breakpoint is in an overlay section.
1388 Did we set a breakpoint at the LMA? */
1389 if (!overlay_events_enabled)
1391 /* Yes -- overlay event support is not active, so we
1392 should have set a breakpoint at the LMA. Remove it.
1394 CORE_ADDR addr = overlay_unmapped_address (b->address,
1396 /* Ignore any failures: if the LMA is in ROM, we will
1397 have already warned when we failed to insert it. */
1398 if (b->type != bp_hardware_breakpoint)
1399 target_remove_hw_breakpoint (addr, b->shadow_contents);
1401 target_remove_breakpoint (addr, b->shadow_contents);
1403 /* Did we set a breakpoint at the VMA?
1404 If so, we will have marked the breakpoint 'inserted'. */
1407 /* Yes -- remove it. Previously we did not bother to
1408 remove the breakpoint if the section had been
1409 unmapped, but let's not rely on that being safe. We
1410 don't know what the overlay manager might do. */
1411 if (b->type == bp_hardware_breakpoint)
1412 val = target_remove_hw_breakpoint (b->address,
1413 b->shadow_contents);
1415 val = target_remove_breakpoint (b->address,
1416 b->shadow_contents);
1420 /* No -- not inserted, so no need to remove. No error. */
1426 b->inserted = (is == mark_inserted);
1428 else if ((b->type == bp_hardware_watchpoint ||
1429 b->type == bp_read_watchpoint ||
1430 b->type == bp_access_watchpoint)
1431 && b->enable_state == bp_enabled
1437 b->inserted = (is == mark_inserted);
1438 /* Walk down the saved value chain. */
1439 for (v = b->val_chain; v; v = v->next)
1441 /* For each memory reference remove the watchpoint
1443 if (VALUE_LVAL (v) == lval_memory
1444 && ! VALUE_LAZY (v))
1446 struct type *vtype = check_typedef (VALUE_TYPE (v));
1448 if (v == b->val_chain
1449 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
1450 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
1455 addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
1456 len = TYPE_LENGTH (VALUE_TYPE (v));
1458 if (b->type == bp_read_watchpoint)
1460 else if (b->type == bp_access_watchpoint)
1463 val = target_remove_watchpoint (addr, len, type);
1470 /* Failure to remove any of the hardware watchpoints comes here. */
1471 if ((is == mark_uninserted) && (b->inserted))
1472 warning ("Could not remove hardware watchpoint %d.",
1475 /* Free the saved value chain. We will construct a new one
1476 the next time the watchpoint is inserted. */
1477 for (v = b->val_chain; v; v = n)
1482 b->val_chain = NULL;
1484 else if ((b->type == bp_catch_fork ||
1485 b->type == bp_catch_vfork ||
1486 b->type == bp_catch_exec)
1487 && b->enable_state == bp_enabled
1494 val = target_remove_fork_catchpoint (PIDGET (inferior_ptid));
1496 case bp_catch_vfork:
1497 val = target_remove_vfork_catchpoint (PIDGET (inferior_ptid));
1500 val = target_remove_exec_catchpoint (PIDGET (inferior_ptid));
1503 warning ("Internal error, %s line %d.", __FILE__, __LINE__);
1508 b->inserted = (is == mark_inserted);
1510 else if ((b->type == bp_catch_catch ||
1511 b->type == bp_catch_throw)
1512 && b->enable_state == bp_enabled
1516 val = target_remove_breakpoint (b->address, b->shadow_contents);
1519 b->inserted = (is == mark_inserted);
1521 else if (ep_is_exception_catchpoint (b)
1522 && b->inserted /* sometimes previous insert doesn't happen */
1523 && b->enable_state == bp_enabled
1527 val = target_remove_breakpoint (b->address, b->shadow_contents);
1531 b->inserted = (is == mark_inserted);
1537 /* Clear the "inserted" flag in all breakpoints. */
1540 mark_breakpoints_out (void)
1542 register struct breakpoint *b;
1548 /* Clear the "inserted" flag in all breakpoints and delete any
1549 breakpoints which should go away between runs of the program.
1551 Plus other such housekeeping that has to be done for breakpoints
1554 Note: this function gets called at the end of a run (by
1555 generic_mourn_inferior) and when a run begins (by
1556 init_wait_for_inferior). */
1561 breakpoint_init_inferior (enum inf_context context)
1563 register struct breakpoint *b, *temp;
1564 static int warning_needed = 0;
1566 ALL_BREAKPOINTS_SAFE (b, temp)
1573 case bp_watchpoint_scope:
1575 /* If the call dummy breakpoint is at the entry point it will
1576 cause problems when the inferior is rerun, so we better
1579 Also get rid of scope breakpoints. */
1580 delete_breakpoint (b);
1584 case bp_hardware_watchpoint:
1585 case bp_read_watchpoint:
1586 case bp_access_watchpoint:
1588 /* Likewise for watchpoints on local expressions. */
1589 if (b->exp_valid_block != NULL)
1590 delete_breakpoint (b);
1591 if (context == inf_starting)
1593 /* Reset val field to force reread of starting value
1594 in insert_breakpoints. */
1596 value_free (b->val);
1601 /* Likewise for exception catchpoints in dynamic-linked
1602 executables where required */
1603 if (ep_is_exception_catchpoint (b) &&
1604 exception_catchpoints_are_fragile)
1607 delete_breakpoint (b);
1613 if (exception_catchpoints_are_fragile)
1614 exception_support_initialized = 0;
1616 /* Don't issue the warning unless it's really needed... */
1617 if (warning_needed && (context != inf_exited))
1619 warning ("Exception catchpoints from last run were deleted.");
1620 warning ("You must reinsert them explicitly.");
1625 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1626 exists at PC. It returns ordinary_breakpoint_here if it's an
1627 ordinary breakpoint, or permanent_breakpoint_here if it's a
1628 permanent breakpoint.
1629 - When continuing from a location with an ordinary breakpoint, we
1630 actually single step once before calling insert_breakpoints.
1631 - When continuing from a localion with a permanent breakpoint, we
1632 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1633 the target, to advance the PC past the breakpoint. */
1635 enum breakpoint_here
1636 breakpoint_here_p (CORE_ADDR pc)
1638 register struct breakpoint *b;
1639 int any_breakpoint_here = 0;
1642 if ((b->enable_state == bp_enabled
1643 || b->enable_state == bp_permanent)
1644 && b->address == pc) /* bp is enabled and matches pc */
1646 if (overlay_debugging
1647 && section_is_overlay (b->section)
1648 && !section_is_mapped (b->section))
1649 continue; /* unmapped overlay -- can't be a match */
1650 else if (b->enable_state == bp_permanent)
1651 return permanent_breakpoint_here;
1653 any_breakpoint_here = 1;
1656 return any_breakpoint_here ? ordinary_breakpoint_here : 0;
1660 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1661 but it only returns true if there is actually a breakpoint inserted
1665 breakpoint_inserted_here_p (CORE_ADDR pc)
1667 register struct breakpoint *b;
1671 && b->address == pc) /* bp is inserted and matches pc */
1673 if (overlay_debugging
1674 && section_is_overlay (b->section)
1675 && !section_is_mapped (b->section))
1676 continue; /* unmapped overlay -- can't be a match */
1684 /* Return nonzero if FRAME is a dummy frame. We can't use
1685 PC_IN_CALL_DUMMY because figuring out the saved SP would take too
1686 much time, at least using get_saved_register on the 68k. This
1687 means that for this function to work right a port must use the
1688 bp_call_dummy breakpoint. */
1691 frame_in_dummy (struct frame_info *frame)
1693 struct breakpoint *b;
1698 if (USE_GENERIC_DUMMY_FRAMES)
1699 return generic_pc_in_call_dummy (frame->pc, frame->frame, frame->frame);
1703 if (b->type == bp_call_dummy
1704 && b->frame == frame->frame
1705 /* We need to check the PC as well as the frame on the sparc,
1706 for signals.exp in the testsuite. */
1709 - SIZEOF_CALL_DUMMY_WORDS / sizeof (LONGEST) * REGISTER_SIZE))
1710 && frame->pc <= b->address)
1716 /* breakpoint_thread_match (PC, PID) returns true if the breakpoint at
1717 PC is valid for process/thread PID. */
1720 breakpoint_thread_match (CORE_ADDR pc, ptid_t ptid)
1722 struct breakpoint *b;
1725 thread = pid_to_thread_id (ptid);
1728 if (b->enable_state != bp_disabled
1729 && b->enable_state != bp_shlib_disabled
1730 && b->enable_state != bp_call_disabled
1732 && (b->thread == -1 || b->thread == thread))
1734 if (overlay_debugging
1735 && section_is_overlay (b->section)
1736 && !section_is_mapped (b->section))
1737 continue; /* unmapped overlay -- can't be a match */
1746 /* bpstat stuff. External routines' interfaces are documented
1750 ep_is_catchpoint (struct breakpoint *ep)
1753 (ep->type == bp_catch_load)
1754 || (ep->type == bp_catch_unload)
1755 || (ep->type == bp_catch_fork)
1756 || (ep->type == bp_catch_vfork)
1757 || (ep->type == bp_catch_exec)
1758 || (ep->type == bp_catch_catch)
1759 || (ep->type == bp_catch_throw);
1761 /* ??rehrauer: Add more kinds here, as are implemented... */
1765 ep_is_shlib_catchpoint (struct breakpoint *ep)
1768 (ep->type == bp_catch_load)
1769 || (ep->type == bp_catch_unload);
1773 ep_is_exception_catchpoint (struct breakpoint *ep)
1776 (ep->type == bp_catch_catch)
1777 || (ep->type == bp_catch_throw);
1780 /* Clear a bpstat so that it says we are not at any breakpoint.
1781 Also free any storage that is part of a bpstat. */
1784 bpstat_clear (bpstat *bsp)
1795 if (p->old_val != NULL)
1796 value_free (p->old_val);
1797 free_command_lines (&p->commands);
1804 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1805 is part of the bpstat is copied as well. */
1808 bpstat_copy (bpstat bs)
1812 bpstat retval = NULL;
1817 for (; bs != NULL; bs = bs->next)
1819 tmp = (bpstat) xmalloc (sizeof (*tmp));
1820 memcpy (tmp, bs, sizeof (*tmp));
1822 /* This is the first thing in the chain. */
1832 /* Find the bpstat associated with this breakpoint */
1835 bpstat_find_breakpoint (bpstat bsp, struct breakpoint *breakpoint)
1840 for (; bsp != NULL; bsp = bsp->next)
1842 if (bsp->breakpoint_at == breakpoint)
1848 /* Find a step_resume breakpoint associated with this bpstat.
1849 (If there are multiple step_resume bp's on the list, this function
1850 will arbitrarily pick one.)
1852 It is an error to use this function if BPSTAT doesn't contain a
1853 step_resume breakpoint.
1855 See wait_for_inferior's use of this function. */
1857 bpstat_find_step_resume_breakpoint (bpstat bsp)
1862 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1864 current_thread = pid_to_thread_id (inferior_ptid);
1866 for (; bsp != NULL; bsp = bsp->next)
1868 if ((bsp->breakpoint_at != NULL) &&
1869 (bsp->breakpoint_at->type == bp_step_resume) &&
1870 (bsp->breakpoint_at->thread == current_thread ||
1871 bsp->breakpoint_at->thread == -1))
1872 return bsp->breakpoint_at;
1875 error ("Internal error (no step_resume breakpoint found)");
1879 /* Return the breakpoint number of the first breakpoint we are stopped
1880 at. *BSP upon return is a bpstat which points to the remaining
1881 breakpoints stopped at (but which is not guaranteed to be good for
1882 anything but further calls to bpstat_num).
1883 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1886 bpstat_num (bpstat *bsp)
1888 struct breakpoint *b;
1891 return 0; /* No more breakpoint values */
1894 b = (*bsp)->breakpoint_at;
1895 *bsp = (*bsp)->next;
1897 return -1; /* breakpoint that's been deleted since */
1899 return b->number; /* We have its number */
1903 /* Modify BS so that the actions will not be performed. */
1906 bpstat_clear_actions (bpstat bs)
1908 for (; bs != NULL; bs = bs->next)
1910 free_command_lines (&bs->commands);
1911 if (bs->old_val != NULL)
1913 value_free (bs->old_val);
1919 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1922 cleanup_executing_breakpoints (PTR ignore)
1924 executing_breakpoint_commands = 0;
1927 /* Execute all the commands associated with all the breakpoints at this
1928 location. Any of these commands could cause the process to proceed
1929 beyond this point, etc. We look out for such changes by checking
1930 the global "breakpoint_proceeded" after each command. */
1933 bpstat_do_actions (bpstat *bsp)
1936 struct cleanup *old_chain;
1937 struct command_line *cmd;
1939 /* Avoid endless recursion if a `source' command is contained
1941 if (executing_breakpoint_commands)
1944 executing_breakpoint_commands = 1;
1945 old_chain = make_cleanup (cleanup_executing_breakpoints, 0);
1948 /* Note that (as of this writing), our callers all appear to
1949 be passing us the address of global stop_bpstat. And, if
1950 our calls to execute_control_command cause the inferior to
1951 proceed, that global (and hence, *bsp) will change.
1953 We must be careful to not touch *bsp unless the inferior
1954 has not proceeded. */
1956 /* This pointer will iterate over the list of bpstat's. */
1959 breakpoint_proceeded = 0;
1960 for (; bs != NULL; bs = bs->next)
1965 execute_control_command (cmd);
1967 if (breakpoint_proceeded)
1972 if (breakpoint_proceeded)
1973 /* The inferior is proceeded by the command; bomb out now.
1974 The bpstat chain has been blown away by wait_for_inferior.
1975 But since execution has stopped again, there is a new bpstat
1976 to look at, so start over. */
1979 free_command_lines (&bs->commands);
1981 do_cleanups (old_chain);
1984 /* This is the normal print function for a bpstat. In the future,
1985 much of this logic could (should?) be moved to bpstat_stop_status,
1986 by having it set different print_it values.
1988 Current scheme: When we stop, bpstat_print() is called. It loops
1989 through the bpstat list of things causing this stop, calling the
1990 print_bp_stop_message function on each one. The behavior of the
1991 print_bp_stop_message function depends on the print_it field of
1992 bpstat. If such field so indicates, call this function here.
1994 Return values from this routine (ultimately used by bpstat_print()
1995 and normal_stop() to decide what to do):
1996 PRINT_NOTHING: Means we already printed all we needed to print,
1997 don't print anything else.
1998 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
1999 that something to be followed by a location.
2000 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2001 that something to be followed by a location.
2002 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2005 static enum print_stop_action
2006 print_it_typical (bpstat bs)
2008 struct cleanup *old_chain;
2009 struct ui_stream *stb;
2010 stb = ui_out_stream_new (uiout);
2011 old_chain = make_cleanup_ui_out_stream_delete (stb);
2012 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2013 which has since been deleted. */
2014 if (bs->breakpoint_at == NULL)
2015 return PRINT_UNKNOWN;
2017 switch (bs->breakpoint_at->type)
2020 case bp_hardware_breakpoint:
2021 annotate_breakpoint (bs->breakpoint_at->number);
2022 ui_out_text (uiout, "\nBreakpoint ");
2023 if (ui_out_is_mi_like_p (uiout))
2024 ui_out_field_string (uiout, "reason", "breakpoint-hit");
2025 ui_out_field_int (uiout, "bkptno", bs->breakpoint_at->number);
2026 ui_out_text (uiout, ", ");
2027 return PRINT_SRC_AND_LOC;
2030 case bp_shlib_event:
2031 /* Did we stop because the user set the stop_on_solib_events
2032 variable? (If so, we report this as a generic, "Stopped due
2033 to shlib event" message.) */
2034 printf_filtered ("Stopped due to shared library event\n");
2035 return PRINT_NOTHING;
2038 case bp_thread_event:
2039 /* Not sure how we will get here.
2040 GDB should not stop for these breakpoints. */
2041 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2042 return PRINT_NOTHING;
2045 case bp_overlay_event:
2046 /* By analogy with the thread event, GDB should not stop for these. */
2047 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2048 return PRINT_NOTHING;
2052 annotate_catchpoint (bs->breakpoint_at->number);
2053 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
2054 printf_filtered ("loaded");
2055 printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname);
2056 return PRINT_SRC_AND_LOC;
2059 case bp_catch_unload:
2060 annotate_catchpoint (bs->breakpoint_at->number);
2061 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
2062 printf_filtered ("unloaded");
2063 printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname);
2064 return PRINT_SRC_AND_LOC;
2068 annotate_catchpoint (bs->breakpoint_at->number);
2069 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
2070 printf_filtered ("forked");
2071 printf_filtered (" process %d), ",
2072 bs->breakpoint_at->forked_inferior_pid);
2073 return PRINT_SRC_AND_LOC;
2076 case bp_catch_vfork:
2077 annotate_catchpoint (bs->breakpoint_at->number);
2078 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
2079 printf_filtered ("vforked");
2080 printf_filtered (" process %d), ",
2081 bs->breakpoint_at->forked_inferior_pid);
2082 return PRINT_SRC_AND_LOC;
2086 annotate_catchpoint (bs->breakpoint_at->number);
2087 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2088 bs->breakpoint_at->number,
2089 bs->breakpoint_at->exec_pathname);
2090 return PRINT_SRC_AND_LOC;
2093 case bp_catch_catch:
2094 if (current_exception_event &&
2095 (CURRENT_EXCEPTION_KIND == EX_EVENT_CATCH))
2097 annotate_catchpoint (bs->breakpoint_at->number);
2098 printf_filtered ("\nCatchpoint %d (exception caught), ",
2099 bs->breakpoint_at->number);
2100 printf_filtered ("throw location ");
2101 if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
2102 printf_filtered ("%s:%d",
2103 CURRENT_EXCEPTION_THROW_FILE,
2104 CURRENT_EXCEPTION_THROW_LINE);
2106 printf_filtered ("unknown");
2108 printf_filtered (", catch location ");
2109 if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
2110 printf_filtered ("%s:%d",
2111 CURRENT_EXCEPTION_CATCH_FILE,
2112 CURRENT_EXCEPTION_CATCH_LINE);
2114 printf_filtered ("unknown");
2116 printf_filtered ("\n");
2117 /* don't bother to print location frame info */
2118 return PRINT_SRC_ONLY;
2122 /* really throw, some other bpstat will handle it */
2123 return PRINT_UNKNOWN;
2127 case bp_catch_throw:
2128 if (current_exception_event &&
2129 (CURRENT_EXCEPTION_KIND == EX_EVENT_THROW))
2131 annotate_catchpoint (bs->breakpoint_at->number);
2132 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2133 bs->breakpoint_at->number);
2134 printf_filtered ("throw location ");
2135 if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
2136 printf_filtered ("%s:%d",
2137 CURRENT_EXCEPTION_THROW_FILE,
2138 CURRENT_EXCEPTION_THROW_LINE);
2140 printf_filtered ("unknown");
2142 printf_filtered (", catch location ");
2143 if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
2144 printf_filtered ("%s:%d",
2145 CURRENT_EXCEPTION_CATCH_FILE,
2146 CURRENT_EXCEPTION_CATCH_LINE);
2148 printf_filtered ("unknown");
2150 printf_filtered ("\n");
2151 /* don't bother to print location frame info */
2152 return PRINT_SRC_ONLY;
2156 /* really catch, some other bpstat will handle it */
2157 return PRINT_UNKNOWN;
2162 case bp_hardware_watchpoint:
2163 if (bs->old_val != NULL)
2165 annotate_watchpoint (bs->breakpoint_at->number);
2166 if (ui_out_is_mi_like_p (uiout))
2167 ui_out_field_string (uiout, "reason", "watchpoint-trigger");
2168 mention (bs->breakpoint_at);
2169 ui_out_tuple_begin (uiout, "value");
2170 ui_out_text (uiout, "\nOld value = ");
2171 value_print (bs->old_val, stb->stream, 0, Val_pretty_default);
2172 ui_out_field_stream (uiout, "old", stb);
2173 ui_out_text (uiout, "\nNew value = ");
2174 value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default);
2175 ui_out_field_stream (uiout, "new", stb);
2176 ui_out_tuple_end (uiout);
2177 ui_out_text (uiout, "\n");
2178 value_free (bs->old_val);
2181 /* More than one watchpoint may have been triggered. */
2182 return PRINT_UNKNOWN;
2185 case bp_read_watchpoint:
2186 if (ui_out_is_mi_like_p (uiout))
2187 ui_out_field_string (uiout, "reason", "read-watchpoint-trigger");
2188 mention (bs->breakpoint_at);
2189 ui_out_tuple_begin (uiout, "value");
2190 ui_out_text (uiout, "\nValue = ");
2191 value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default);
2192 ui_out_field_stream (uiout, "value", stb);
2193 ui_out_tuple_end (uiout);
2194 ui_out_text (uiout, "\n");
2195 return PRINT_UNKNOWN;
2198 case bp_access_watchpoint:
2199 if (bs->old_val != NULL)
2201 annotate_watchpoint (bs->breakpoint_at->number);
2202 if (ui_out_is_mi_like_p (uiout))
2203 ui_out_field_string (uiout, "reason", "access-watchpoint-trigger");
2204 mention (bs->breakpoint_at);
2205 ui_out_tuple_begin (uiout, "value");
2206 ui_out_text (uiout, "\nOld value = ");
2207 value_print (bs->old_val, stb->stream, 0, Val_pretty_default);
2208 ui_out_field_stream (uiout, "old", stb);
2209 value_free (bs->old_val);
2211 ui_out_text (uiout, "\nNew value = ");
2215 mention (bs->breakpoint_at);
2216 if (ui_out_is_mi_like_p (uiout))
2217 ui_out_field_string (uiout, "reason", "access-watchpoint-trigger");
2218 ui_out_tuple_begin (uiout, "value");
2219 ui_out_text (uiout, "\nValue = ");
2221 value_print (bs->breakpoint_at->val, stb->stream, 0,Val_pretty_default);
2222 ui_out_field_stream (uiout, "new", stb);
2223 ui_out_tuple_end (uiout);
2224 ui_out_text (uiout, "\n");
2225 return PRINT_UNKNOWN;
2228 /* Fall through, we don't deal with these types of breakpoints
2232 if (ui_out_is_mi_like_p (uiout))
2233 ui_out_field_string (uiout, "reason", "function-finished");
2234 return PRINT_UNKNOWN;
2238 if (ui_out_is_mi_like_p (uiout))
2239 ui_out_field_string (uiout, "reason", "location-reached");
2240 return PRINT_UNKNOWN;
2245 case bp_longjmp_resume:
2246 case bp_step_resume:
2247 case bp_through_sigtramp:
2248 case bp_watchpoint_scope:
2251 return PRINT_UNKNOWN;
2255 /* Generic routine for printing messages indicating why we
2256 stopped. The behavior of this function depends on the value
2257 'print_it' in the bpstat structure. Under some circumstances we
2258 may decide not to print anything here and delegate the task to
2261 static enum print_stop_action
2262 print_bp_stop_message (bpstat bs)
2264 switch (bs->print_it)
2267 /* Nothing should be printed for this bpstat entry. */
2268 return PRINT_UNKNOWN;
2272 /* We still want to print the frame, but we already printed the
2273 relevant messages. */
2274 return PRINT_SRC_AND_LOC;
2277 case print_it_normal:
2278 /* Normal case, we handle everything in print_it_typical. */
2279 return print_it_typical (bs);
2282 internal_error (__FILE__, __LINE__,
2283 "print_bp_stop_message: unrecognized enum value");
2288 /* Print a message indicating what happened. This is called from
2289 normal_stop(). The input to this routine is the head of the bpstat
2290 list - a list of the eventpoints that caused this stop. This
2291 routine calls the generic print routine for printing a message
2292 about reasons for stopping. This will print (for example) the
2293 "Breakpoint n," part of the output. The return value of this
2296 PRINT_UNKNOWN: Means we printed nothing
2297 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2298 code to print the location. An example is
2299 "Breakpoint 1, " which should be followed by
2301 PRINT_SRC_ONLY: Means we printed something, but there is no need
2302 to also print the location part of the message.
2303 An example is the catch/throw messages, which
2304 don't require a location appended to the end.
2305 PRINT_NOTHING: We have done some printing and we don't need any
2306 further info to be printed.*/
2308 enum print_stop_action
2309 bpstat_print (bpstat bs)
2313 /* Maybe another breakpoint in the chain caused us to stop.
2314 (Currently all watchpoints go on the bpstat whether hit or not.
2315 That probably could (should) be changed, provided care is taken
2316 with respect to bpstat_explains_signal). */
2317 for (; bs; bs = bs->next)
2319 val = print_bp_stop_message (bs);
2320 if (val == PRINT_SRC_ONLY
2321 || val == PRINT_SRC_AND_LOC
2322 || val == PRINT_NOTHING)
2326 /* We reached the end of the chain, or we got a null BS to start
2327 with and nothing was printed. */
2328 return PRINT_UNKNOWN;
2331 /* Evaluate the expression EXP and return 1 if value is zero.
2332 This is used inside a catch_errors to evaluate the breakpoint condition.
2333 The argument is a "struct expression *" that has been cast to char * to
2334 make it pass through catch_errors. */
2337 breakpoint_cond_eval (PTR exp)
2339 struct value *mark = value_mark ();
2340 int i = !value_true (evaluate_expression ((struct expression *) exp));
2341 value_free_to_mark (mark);
2345 /* Allocate a new bpstat and chain it to the current one. */
2348 bpstat_alloc (struct breakpoint *b, bpstat cbs /* Current "bs" value */ )
2352 bs = (bpstat) xmalloc (sizeof (*bs));
2354 bs->breakpoint_at = b;
2355 /* If the condition is false, etc., don't do the commands. */
2356 bs->commands = NULL;
2358 bs->print_it = print_it_normal;
2362 /* Possible return values for watchpoint_check (this can't be an enum
2363 because of check_errors). */
2364 /* The watchpoint has been deleted. */
2365 #define WP_DELETED 1
2366 /* The value has changed. */
2367 #define WP_VALUE_CHANGED 2
2368 /* The value has not changed. */
2369 #define WP_VALUE_NOT_CHANGED 3
2371 #define BP_TEMPFLAG 1
2372 #define BP_HARDWAREFLAG 2
2374 /* Check watchpoint condition. */
2377 watchpoint_check (PTR p)
2379 bpstat bs = (bpstat) p;
2380 struct breakpoint *b;
2381 struct frame_info *fr;
2382 int within_current_scope;
2384 b = bs->breakpoint_at;
2386 if (b->exp_valid_block == NULL)
2387 within_current_scope = 1;
2390 /* There is no current frame at this moment. If we're going to have
2391 any chance of handling watchpoints on local variables, we'll need
2392 the frame chain (so we can determine if we're in scope). */
2393 reinit_frame_cache ();
2394 fr = frame_find_by_id (b->watchpoint_frame);
2395 within_current_scope = (fr != NULL);
2396 /* in_function_epilogue_p() returns a non-zero value if we're still
2397 in the function but the stack frame has already been invalidated.
2398 Since we can't rely on the values of local variables after the
2399 stack has been destroyed, we are treating the watchpoint in that
2400 state as `not changed' without further checking. */
2401 if (within_current_scope && fr == get_current_frame ()
2402 && gdbarch_in_function_epilogue_p (current_gdbarch, read_pc ()))
2403 return WP_VALUE_NOT_CHANGED;
2404 if (within_current_scope)
2405 /* If we end up stopping, the current frame will get selected
2406 in normal_stop. So this call to select_frame won't affect
2411 if (within_current_scope)
2413 /* We use value_{,free_to_}mark because it could be a
2414 *long* time before we return to the command level and
2415 call free_all_values. We can't call free_all_values because
2416 we might be in the middle of evaluating a function call. */
2418 struct value *mark = value_mark ();
2419 struct value *new_val = evaluate_expression (bs->breakpoint_at->exp);
2420 if (!value_equal (b->val, new_val))
2422 release_value (new_val);
2423 value_free_to_mark (mark);
2424 bs->old_val = b->val;
2426 /* We will stop here */
2427 return WP_VALUE_CHANGED;
2431 /* Nothing changed, don't do anything. */
2432 value_free_to_mark (mark);
2433 /* We won't stop here */
2434 return WP_VALUE_NOT_CHANGED;
2439 /* This seems like the only logical thing to do because
2440 if we temporarily ignored the watchpoint, then when
2441 we reenter the block in which it is valid it contains
2442 garbage (in the case of a function, it may have two
2443 garbage values, one before and one after the prologue).
2444 So we can't even detect the first assignment to it and
2445 watch after that (since the garbage may or may not equal
2446 the first value assigned). */
2447 /* We print all the stop information in print_it_typical(), but
2448 in this case, by the time we call print_it_typical() this bp
2449 will be deleted already. So we have no choice but print the
2450 information here. */
2451 if (ui_out_is_mi_like_p (uiout))
2452 ui_out_field_string (uiout, "reason", "watchpoint-scope");
2453 ui_out_text (uiout, "\nWatchpoint ");
2454 ui_out_field_int (uiout, "wpnum", bs->breakpoint_at->number);
2455 ui_out_text (uiout, " deleted because the program has left the block in\n\
2456 which its expression is valid.\n");
2458 if (b->related_breakpoint)
2459 b->related_breakpoint->disposition = disp_del_at_next_stop;
2460 b->disposition = disp_del_at_next_stop;
2466 /* Get a bpstat associated with having just stopped at address *PC
2467 and frame address CORE_ADDRESS. Update *PC to point at the
2468 breakpoint (if we hit a breakpoint). NOT_A_SW_BREAKPOINT is nonzero
2469 if this is known to not be a real breakpoint (it could still be a
2470 watchpoint, though). */
2472 /* Determine whether we stopped at a breakpoint, etc, or whether we
2473 don't understand this stop. Result is a chain of bpstat's such that:
2475 if we don't understand the stop, the result is a null pointer.
2477 if we understand why we stopped, the result is not null.
2479 Each element of the chain refers to a particular breakpoint or
2480 watchpoint at which we have stopped. (We may have stopped for
2481 several reasons concurrently.)
2483 Each element of the chain has valid next, breakpoint_at,
2484 commands, FIXME??? fields. */
2487 bpstat_stop_status (CORE_ADDR *pc, int not_a_sw_breakpoint)
2489 register struct breakpoint *b, *temp;
2491 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2492 int real_breakpoint = 0;
2493 /* Root of the chain of bpstat's */
2494 struct bpstats root_bs[1];
2495 /* Pointer to the last thing in the chain currently. */
2496 bpstat bs = root_bs;
2497 static char message1[] =
2498 "Error evaluating expression for watchpoint %d\n";
2499 char message[sizeof (message1) + 30 /* slop */ ];
2501 /* Get the address where the breakpoint would have been. The
2502 "not_a_sw_breakpoint" argument is meant to distinguish between a
2503 breakpoint trap event and a trace/singlestep trap event. For a
2504 trace/singlestep trap event, we would not want to subtract
2505 DECR_PC_AFTER_BREAK from the PC. */
2507 bp_addr = *pc - (not_a_sw_breakpoint ? 0 : DECR_PC_AFTER_BREAK);
2509 ALL_BREAKPOINTS_SAFE (b, temp)
2511 if (b->enable_state == bp_disabled
2512 || b->enable_state == bp_shlib_disabled
2513 || b->enable_state == bp_call_disabled)
2516 if (b->type != bp_watchpoint
2517 && b->type != bp_hardware_watchpoint
2518 && b->type != bp_read_watchpoint
2519 && b->type != bp_access_watchpoint
2520 && b->type != bp_hardware_breakpoint
2521 && b->type != bp_catch_fork
2522 && b->type != bp_catch_vfork
2523 && b->type != bp_catch_exec
2524 && b->type != bp_catch_catch
2525 && b->type != bp_catch_throw) /* a non-watchpoint bp */
2527 if (b->address != bp_addr) /* address doesn't match */
2529 if (overlay_debugging /* unmapped overlay section */
2530 && section_is_overlay (b->section)
2531 && !section_is_mapped (b->section))
2535 if (b->type == bp_hardware_breakpoint)
2537 if (b->address != (*pc - DECR_PC_AFTER_HW_BREAK))
2539 if (overlay_debugging /* unmapped overlay section */
2540 && section_is_overlay (b->section)
2541 && !section_is_mapped (b->section))
2545 /* Is this a catchpoint of a load or unload? If so, did we
2546 get a load or unload of the specified library? If not,
2548 if ((b->type == bp_catch_load)
2549 #if defined(SOLIB_HAVE_LOAD_EVENT)
2550 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid))
2551 || ((b->dll_pathname != NULL)
2552 && (strcmp (b->dll_pathname,
2553 SOLIB_LOADED_LIBRARY_PATHNAME (
2554 PIDGET (inferior_ptid)))
2560 if ((b->type == bp_catch_unload)
2561 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2562 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid))
2563 || ((b->dll_pathname != NULL)
2564 && (strcmp (b->dll_pathname,
2565 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2566 PIDGET (inferior_ptid)))
2572 if ((b->type == bp_catch_fork)
2573 && !target_has_forked (PIDGET (inferior_ptid),
2574 &b->forked_inferior_pid))
2577 if ((b->type == bp_catch_vfork)
2578 && !target_has_vforked (PIDGET (inferior_ptid),
2579 &b->forked_inferior_pid))
2582 if ((b->type == bp_catch_exec)
2583 && !target_has_execd (PIDGET (inferior_ptid), &b->exec_pathname))
2586 if (ep_is_exception_catchpoint (b) &&
2587 !(current_exception_event = target_get_current_exception_event ()))
2590 /* Come here if it's a watchpoint, or if the break address matches */
2592 bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */
2594 /* Watchpoints may change this, if not found to have triggered. */
2598 sprintf (message, message1, b->number);
2599 if (b->type == bp_watchpoint ||
2600 b->type == bp_hardware_watchpoint)
2602 switch (catch_errors (watchpoint_check, bs, message,
2606 /* We've already printed what needs to be printed. */
2607 /* Actually this is superfluous, because by the time we
2608 call print_it_typical() the wp will be already deleted,
2609 and the function will return immediately. */
2610 bs->print_it = print_it_done;
2613 case WP_VALUE_CHANGED:
2617 case WP_VALUE_NOT_CHANGED:
2619 bs->print_it = print_it_noop;
2626 /* Error from catch_errors. */
2627 printf_filtered ("Watchpoint %d deleted.\n", b->number);
2628 if (b->related_breakpoint)
2629 b->related_breakpoint->disposition = disp_del_at_next_stop;
2630 b->disposition = disp_del_at_next_stop;
2631 /* We've already printed what needs to be printed. */
2632 bs->print_it = print_it_done;
2638 else if (b->type == bp_read_watchpoint ||
2639 b->type == bp_access_watchpoint)
2645 addr = target_stopped_data_address ();
2648 for (v = b->val_chain; v; v = v->next)
2650 if (VALUE_LVAL (v) == lval_memory
2651 && ! VALUE_LAZY (v))
2653 struct type *vtype = check_typedef (VALUE_TYPE (v));
2655 if (v == b->val_chain
2656 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
2657 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
2661 vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
2662 /* Exact match not required. Within range is
2664 if (addr >= vaddr &&
2665 addr < vaddr + TYPE_LENGTH (VALUE_TYPE (v)))
2671 switch (catch_errors (watchpoint_check, bs, message,
2675 /* We've already printed what needs to be printed. */
2676 bs->print_it = print_it_done;
2679 case WP_VALUE_CHANGED:
2680 if (b->type == bp_read_watchpoint)
2682 /* Don't stop: read watchpoints shouldn't fire if
2683 the value has changed. This is for targets which
2684 cannot set read-only watchpoints. */
2685 bs->print_it = print_it_noop;
2691 case WP_VALUE_NOT_CHANGED:
2698 /* Error from catch_errors. */
2699 printf_filtered ("Watchpoint %d deleted.\n", b->number);
2700 if (b->related_breakpoint)
2701 b->related_breakpoint->disposition = disp_del_at_next_stop;
2702 b->disposition = disp_del_at_next_stop;
2703 /* We've already printed what needs to be printed. */
2704 bs->print_it = print_it_done;
2707 else /* found == 0 */
2709 /* This is a case where some watchpoint(s) triggered,
2710 but not at the address of this watchpoint (FOUND
2711 was left zero). So don't print anything for this
2713 bs->print_it = print_it_noop;
2720 /* By definition, an encountered breakpoint is a triggered
2724 real_breakpoint = 1;
2728 b->frame != (get_current_frame ())->frame)
2732 int value_is_zero = 0;
2736 /* Need to select the frame, with all that implies
2737 so that the conditions will have the right context. */
2738 select_frame (get_current_frame ());
2740 = catch_errors (breakpoint_cond_eval, (b->cond),
2741 "Error in testing breakpoint condition:\n",
2743 /* FIXME-someday, should give breakpoint # */
2746 if (b->cond && value_is_zero)
2749 /* Don't consider this a hit. */
2752 else if (b->ignore_count > 0)
2755 annotate_ignore_count_change ();
2760 /* We will stop here */
2761 if (b->disposition == disp_disable)
2762 b->enable_state = bp_disabled;
2763 bs->commands = copy_command_lines (b->commands);
2767 (STREQ ("silent", bs->commands->line) ||
2768 (xdb_commands && STREQ ("Q", bs->commands->line))))
2770 bs->commands = bs->commands->next;
2775 /* Print nothing for this entry if we dont stop or if we dont print. */
2776 if (bs->stop == 0 || bs->print == 0)
2777 bs->print_it = print_it_noop;
2780 bs->next = NULL; /* Terminate the chain */
2781 bs = root_bs->next; /* Re-grab the head of the chain */
2783 if (real_breakpoint && bs)
2785 if (bs->breakpoint_at->type == bp_hardware_breakpoint)
2787 if (DECR_PC_AFTER_HW_BREAK != 0)
2789 *pc = *pc - DECR_PC_AFTER_HW_BREAK;
2795 if (DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs)
2798 #if defined (SHIFT_INST_REGS)
2800 #else /* No SHIFT_INST_REGS. */
2802 #endif /* No SHIFT_INST_REGS. */
2807 /* The value of a hardware watchpoint hasn't changed, but the
2808 intermediate memory locations we are watching may have. */
2809 if (bs && !bs->stop &&
2810 (bs->breakpoint_at->type == bp_hardware_watchpoint ||
2811 bs->breakpoint_at->type == bp_read_watchpoint ||
2812 bs->breakpoint_at->type == bp_access_watchpoint))
2814 remove_breakpoints ();
2815 insert_breakpoints ();
2820 /* Tell what to do about this bpstat. */
2822 bpstat_what (bpstat bs)
2824 /* Classify each bpstat as one of the following. */
2827 /* This bpstat element has no effect on the main_action. */
2830 /* There was a watchpoint, stop but don't print. */
2833 /* There was a watchpoint, stop and print. */
2836 /* There was a breakpoint but we're not stopping. */
2839 /* There was a breakpoint, stop but don't print. */
2842 /* There was a breakpoint, stop and print. */
2845 /* We hit the longjmp breakpoint. */
2848 /* We hit the longjmp_resume breakpoint. */
2851 /* We hit the step_resume breakpoint. */
2854 /* We hit the through_sigtramp breakpoint. */
2857 /* We hit the shared library event breakpoint. */
2860 /* We caught a shared library event. */
2863 /* This is just used to count how many enums there are. */
2867 /* Here is the table which drives this routine. So that we can
2868 format it pretty, we define some abbreviations for the
2869 enum bpstat_what codes. */
2870 #define kc BPSTAT_WHAT_KEEP_CHECKING
2871 #define ss BPSTAT_WHAT_STOP_SILENT
2872 #define sn BPSTAT_WHAT_STOP_NOISY
2873 #define sgl BPSTAT_WHAT_SINGLE
2874 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2875 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2876 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2877 #define sr BPSTAT_WHAT_STEP_RESUME
2878 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2879 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2880 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2882 /* "Can't happen." Might want to print an error message.
2883 abort() is not out of the question, but chances are GDB is just
2884 a bit confused, not unusable. */
2885 #define err BPSTAT_WHAT_STOP_NOISY
2887 /* Given an old action and a class, come up with a new action. */
2888 /* One interesting property of this table is that wp_silent is the same
2889 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2890 after stopping, the check for whether to step over a breakpoint
2891 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2892 reference to how we stopped. We retain separate wp_silent and
2893 bp_silent codes in case we want to change that someday.
2895 Another possibly interesting property of this table is that
2896 there's a partial ordering, priority-like, of the actions. Once
2897 you've decided that some action is appropriate, you'll never go
2898 back and decide something of a lower priority is better. The
2901 kc < clr sgl shl shlr slr sn sr ss ts
2902 sgl < clrs shl shlr slr sn sr ss ts
2903 slr < err shl shlr sn sr ss ts
2904 clr < clrs err shl shlr sn sr ss ts
2905 clrs < err shl shlr sn sr ss ts
2906 ss < shl shlr sn sr ts
2913 What I think this means is that we don't need a damned table
2914 here. If you just put the rows and columns in the right order,
2915 it'd look awfully regular. We could simply walk the bpstat list
2916 and choose the highest priority action we find, with a little
2917 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2918 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2919 is messy anyway). */
2921 /* step_resume entries: a step resume breakpoint overrides another
2922 breakpoint of signal handling (see comment in wait_for_inferior
2923 at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
2924 /* We handle the through_sigtramp_breakpoint the same way; having both
2925 one of those and a step_resume_breakpoint is probably very rare (?). */
2927 static const enum bpstat_what_main_action
2928 table[(int) class_last][(int) BPSTAT_WHAT_LAST] =
2931 /* kc ss sn sgl slr clr clrs sr ts shl shlr
2934 {kc, ss, sn, sgl, slr, clr, clrs, sr, ts, shl, shlr},
2936 {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
2938 {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
2940 {sgl, ss, sn, sgl, slr, clrs, clrs, sr, ts, shl, shlr},
2942 {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
2944 {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
2946 {slr, ss, sn, slr, slr, err, err, sr, ts, shl, shlr},
2948 {clr, ss, sn, clrs, err, err, err, sr, ts, shl, shlr},
2950 {sr, sr, sr, sr, sr, sr, sr, sr, ts, shl, shlr},
2952 {ts, ts, ts, ts, ts, ts, ts, ts, ts, shl, shlr},
2954 {shl, shl, shl, shl, shl, shl, shl, shl, ts, shl, shlr},
2956 {shlr, shlr, shlr, shlr, shlr, shlr, shlr, shlr, ts, shlr, shlr}
2971 enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
2972 struct bpstat_what retval;
2974 retval.call_dummy = 0;
2975 for (; bs != NULL; bs = bs->next)
2977 enum class bs_class = no_effect;
2978 if (bs->breakpoint_at == NULL)
2979 /* I suspect this can happen if it was a momentary breakpoint
2980 which has since been deleted. */
2982 switch (bs->breakpoint_at->type)
2988 case bp_hardware_breakpoint:
2994 bs_class = bp_noisy;
2996 bs_class = bp_silent;
2999 bs_class = bp_nostop;
3002 case bp_hardware_watchpoint:
3003 case bp_read_watchpoint:
3004 case bp_access_watchpoint:
3008 bs_class = wp_noisy;
3010 bs_class = wp_silent;
3013 /* There was a watchpoint, but we're not stopping.
3014 This requires no further action. */
3015 bs_class = no_effect;
3018 bs_class = long_jump;
3020 case bp_longjmp_resume:
3021 bs_class = long_resume;
3023 case bp_step_resume:
3026 bs_class = step_resume;
3029 /* It is for the wrong frame. */
3030 bs_class = bp_nostop;
3032 case bp_through_sigtramp:
3033 bs_class = through_sig;
3035 case bp_watchpoint_scope:
3036 bs_class = bp_nostop;
3038 case bp_shlib_event:
3039 bs_class = shlib_event;
3041 case bp_thread_event:
3042 case bp_overlay_event:
3043 bs_class = bp_nostop;
3046 case bp_catch_unload:
3047 /* Only if this catchpoint triggered should we cause the
3048 step-out-of-dld behaviour. Otherwise, we ignore this
3051 bs_class = catch_shlib_event;
3053 bs_class = no_effect;
3056 case bp_catch_vfork:
3061 bs_class = bp_noisy;
3063 bs_class = bp_silent;
3066 /* There was a catchpoint, but we're not stopping.
3067 This requires no further action. */
3068 bs_class = no_effect;
3070 case bp_catch_catch:
3071 if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_CATCH)
3072 bs_class = bp_nostop;
3074 bs_class = bs->print ? bp_noisy : bp_silent;
3076 case bp_catch_throw:
3077 if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_THROW)
3078 bs_class = bp_nostop;
3080 bs_class = bs->print ? bp_noisy : bp_silent;
3083 /* Make sure the action is stop (silent or noisy),
3084 so infrun.c pops the dummy frame. */
3085 bs_class = bp_silent;
3086 retval.call_dummy = 1;
3089 current_action = table[(int) bs_class][(int) current_action];
3091 retval.main_action = current_action;
3095 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3096 without hardware support). This isn't related to a specific bpstat,
3097 just to things like whether watchpoints are set. */
3100 bpstat_should_step (void)
3102 struct breakpoint *b;
3104 if (b->enable_state == bp_enabled && b->type == bp_watchpoint)
3109 /* Nonzero if there are enabled hardware watchpoints. */
3111 bpstat_have_active_hw_watchpoints (void)
3113 struct breakpoint *b;
3115 if ((b->enable_state == bp_enabled) &&
3117 ((b->type == bp_hardware_watchpoint) ||
3118 (b->type == bp_read_watchpoint) ||
3119 (b->type == bp_access_watchpoint)))
3125 /* Given a bpstat that records zero or more triggered eventpoints, this
3126 function returns another bpstat which contains only the catchpoints
3127 on that first list, if any. */
3129 bpstat_get_triggered_catchpoints (bpstat ep_list, bpstat *cp_list)
3131 struct bpstats root_bs[1];
3132 bpstat bs = root_bs;
3133 struct breakpoint *ep;
3136 bpstat_clear (cp_list);
3137 root_bs->next = NULL;
3139 for (; ep_list != NULL; ep_list = ep_list->next)
3141 /* Is this eventpoint a catchpoint? If not, ignore it. */
3142 ep = ep_list->breakpoint_at;
3145 if ((ep->type != bp_catch_load) &&
3146 (ep->type != bp_catch_unload) &&
3147 (ep->type != bp_catch_catch) &&
3148 (ep->type != bp_catch_throw))
3149 /* pai: (temp) ADD fork/vfork here!! */
3152 /* Yes; add it to the list. */
3153 bs = bpstat_alloc (ep, bs);
3158 #if defined(SOLIB_ADD)
3159 /* Also, for each triggered catchpoint, tag it with the name of
3160 the library that caused this trigger. (We copy the name now,
3161 because it's only guaranteed to be available NOW, when the
3162 catchpoint triggers. Clients who may wish to know the name
3163 later must get it from the catchpoint itself.) */
3164 if (ep->triggered_dll_pathname != NULL)
3165 xfree (ep->triggered_dll_pathname);
3166 if (ep->type == bp_catch_load)
3167 dll_pathname = SOLIB_LOADED_LIBRARY_PATHNAME (
3168 PIDGET (inferior_ptid));
3170 dll_pathname = SOLIB_UNLOADED_LIBRARY_PATHNAME (
3171 PIDGET (inferior_ptid));
3173 dll_pathname = NULL;
3177 ep->triggered_dll_pathname = (char *)
3178 xmalloc (strlen (dll_pathname) + 1);
3179 strcpy (ep->triggered_dll_pathname, dll_pathname);
3182 ep->triggered_dll_pathname = NULL;
3188 /* Print B to gdb_stdout. */
3190 print_one_breakpoint (struct breakpoint *b,
3191 CORE_ADDR *last_addr)
3193 register struct command_line *l;
3194 register struct symbol *sym;
3195 struct ep_type_description
3200 static struct ep_type_description bptypes[] =
3202 {bp_none, "?deleted?"},
3203 {bp_breakpoint, "breakpoint"},
3204 {bp_hardware_breakpoint, "hw breakpoint"},
3205 {bp_until, "until"},
3206 {bp_finish, "finish"},
3207 {bp_watchpoint, "watchpoint"},
3208 {bp_hardware_watchpoint, "hw watchpoint"},
3209 {bp_read_watchpoint, "read watchpoint"},
3210 {bp_access_watchpoint, "acc watchpoint"},
3211 {bp_longjmp, "longjmp"},
3212 {bp_longjmp_resume, "longjmp resume"},
3213 {bp_step_resume, "step resume"},
3214 {bp_through_sigtramp, "sigtramp"},
3215 {bp_watchpoint_scope, "watchpoint scope"},
3216 {bp_call_dummy, "call dummy"},
3217 {bp_shlib_event, "shlib events"},
3218 {bp_thread_event, "thread events"},
3219 {bp_overlay_event, "overlay events"},
3220 {bp_catch_load, "catch load"},
3221 {bp_catch_unload, "catch unload"},
3222 {bp_catch_fork, "catch fork"},
3223 {bp_catch_vfork, "catch vfork"},
3224 {bp_catch_exec, "catch exec"},
3225 {bp_catch_catch, "catch catch"},
3226 {bp_catch_throw, "catch throw"}
3229 static char *bpdisps[] =
3230 {"del", "dstp", "dis", "keep"};
3231 static char bpenables[] = "nynny";
3232 char wrap_indent[80];
3233 struct ui_stream *stb = ui_out_stream_new (uiout);
3234 struct cleanup *old_chain = make_cleanup_ui_out_stream_delete (stb);
3237 ui_out_tuple_begin (uiout, "bkpt");
3241 ui_out_field_int (uiout, "number", b->number);
3245 if (((int) b->type > (sizeof (bptypes) / sizeof (bptypes[0])))
3246 || ((int) b->type != bptypes[(int) b->type].type))
3247 internal_error (__FILE__, __LINE__,
3248 "bptypes table does not describe type #%d.",
3250 ui_out_field_string (uiout, "type", bptypes[(int) b->type].description);
3254 ui_out_field_string (uiout, "disp", bpdisps[(int) b->disposition]);
3258 ui_out_field_fmt (uiout, "enabled", "%c", bpenables[(int) b->enable_state]);
3259 ui_out_spaces (uiout, 2);
3262 strcpy (wrap_indent, " ");
3265 if (TARGET_ADDR_BIT <= 32)
3266 strcat (wrap_indent, " ");
3268 strcat (wrap_indent, " ");
3273 internal_error (__FILE__, __LINE__,
3274 "print_one_breakpoint: bp_none encountered\n");
3278 case bp_hardware_watchpoint:
3279 case bp_read_watchpoint:
3280 case bp_access_watchpoint:
3281 /* Field 4, the address, is omitted (which makes the columns
3282 not line up too nicely with the headers, but the effect
3283 is relatively readable). */
3285 ui_out_field_skip (uiout, "addr");
3287 print_expression (b->exp, stb->stream);
3288 ui_out_field_stream (uiout, "what", stb);
3292 case bp_catch_unload:
3293 /* Field 4, the address, is omitted (which makes the columns
3294 not line up too nicely with the headers, but the effect
3295 is relatively readable). */
3297 ui_out_field_skip (uiout, "addr");
3299 if (b->dll_pathname == NULL)
3301 ui_out_field_string (uiout, "what", "<any library>");
3302 ui_out_spaces (uiout, 1);
3306 ui_out_text (uiout, "library \"");
3307 ui_out_field_string (uiout, "what", b->dll_pathname);
3308 ui_out_text (uiout, "\" ");
3313 case bp_catch_vfork:
3314 /* Field 4, the address, is omitted (which makes the columns
3315 not line up too nicely with the headers, but the effect
3316 is relatively readable). */
3318 ui_out_field_skip (uiout, "addr");
3320 if (b->forked_inferior_pid != 0)
3322 ui_out_text (uiout, "process ");
3323 ui_out_field_int (uiout, "what", b->forked_inferior_pid);
3324 ui_out_spaces (uiout, 1);
3328 /* Field 4, the address, is omitted (which makes the columns
3329 not line up too nicely with the headers, but the effect
3330 is relatively readable). */
3332 ui_out_field_skip (uiout, "addr");
3334 if (b->exec_pathname != NULL)
3336 ui_out_text (uiout, "program \"");
3337 ui_out_field_string (uiout, "what", b->exec_pathname);
3338 ui_out_text (uiout, "\" ");
3342 case bp_catch_catch:
3343 /* Field 4, the address, is omitted (which makes the columns
3344 not line up too nicely with the headers, but the effect
3345 is relatively readable). */
3347 ui_out_field_skip (uiout, "addr");
3349 ui_out_field_string (uiout, "what", "exception catch");
3350 ui_out_spaces (uiout, 1);
3353 case bp_catch_throw:
3354 /* Field 4, the address, is omitted (which makes the columns
3355 not line up too nicely with the headers, but the effect
3356 is relatively readable). */
3358 ui_out_field_skip (uiout, "addr");
3360 ui_out_field_string (uiout, "what", "exception throw");
3361 ui_out_spaces (uiout, 1);
3365 case bp_hardware_breakpoint:
3369 case bp_longjmp_resume:
3370 case bp_step_resume:
3371 case bp_through_sigtramp:
3372 case bp_watchpoint_scope:
3374 case bp_shlib_event:
3375 case bp_thread_event:
3376 case bp_overlay_event:
3380 ui_out_field_core_addr (uiout, "addr", b->address);
3383 *last_addr = b->address;
3386 sym = find_pc_sect_function (b->address, b->section);
3389 ui_out_text (uiout, "in ");
3390 ui_out_field_string (uiout, "func",
3391 SYMBOL_SOURCE_NAME (sym));
3392 ui_out_wrap_hint (uiout, wrap_indent);
3393 ui_out_text (uiout, " at ");
3395 ui_out_field_string (uiout, "file", b->source_file);
3396 ui_out_text (uiout, ":");
3397 ui_out_field_int (uiout, "line", b->line_number);
3401 print_address_symbolic (b->address, stb->stream, demangle, "");
3402 ui_out_field_stream (uiout, "at", stb);
3407 if (b->thread != -1)
3409 /* FIXME: This seems to be redundant and lost here; see the
3410 "stop only in" line a little further down. */
3411 ui_out_text (uiout, " thread ");
3412 ui_out_field_int (uiout, "thread", b->thread);
3415 ui_out_text (uiout, "\n");
3420 ui_out_text (uiout, "\tstop only in stack frame at ");
3421 ui_out_field_core_addr (uiout, "frame", b->frame);
3422 ui_out_text (uiout, "\n");
3428 ui_out_text (uiout, "\tstop only if ");
3429 print_expression (b->cond, stb->stream);
3430 ui_out_field_stream (uiout, "cond", stb);
3431 ui_out_text (uiout, "\n");
3434 if (b->thread != -1)
3436 /* FIXME should make an annotation for this */
3437 ui_out_text (uiout, "\tstop only in thread ");
3438 ui_out_field_int (uiout, "thread", b->thread);
3439 ui_out_text (uiout, "\n");
3442 if (show_breakpoint_hit_counts && b->hit_count)
3444 /* FIXME should make an annotation for this */
3445 if (ep_is_catchpoint (b))
3446 ui_out_text (uiout, "\tcatchpoint");
3448 ui_out_text (uiout, "\tbreakpoint");
3449 ui_out_text (uiout, " already hit ");
3450 ui_out_field_int (uiout, "times", b->hit_count);
3451 if (b->hit_count == 1)
3452 ui_out_text (uiout, " time\n");
3454 ui_out_text (uiout, " times\n");
3457 /* Output the count also if it is zero, but only if this is
3458 mi. FIXME: Should have a better test for this. */
3459 if (ui_out_is_mi_like_p (uiout))
3460 if (show_breakpoint_hit_counts && b->hit_count == 0)
3461 ui_out_field_int (uiout, "times", b->hit_count);
3463 if (b->ignore_count)
3466 ui_out_text (uiout, "\tignore next ");
3467 ui_out_field_int (uiout, "ignore", b->ignore_count);
3468 ui_out_text (uiout, " hits\n");
3471 if ((l = b->commands))
3474 ui_out_tuple_begin (uiout, "script");
3475 print_command_lines (uiout, l, 4);
3476 ui_out_tuple_end (uiout);
3478 ui_out_tuple_end (uiout);
3479 do_cleanups (old_chain);
3482 struct captured_breakpoint_query_args
3488 do_captured_breakpoint_query (struct ui_out *uiout, void *data)
3490 struct captured_breakpoint_query_args *args = data;
3491 register struct breakpoint *b;
3492 CORE_ADDR dummy_addr = 0;
3495 if (args->bnum == b->number)
3497 print_one_breakpoint (b, &dummy_addr);
3505 gdb_breakpoint_query (struct ui_out *uiout, int bnum)
3507 struct captured_breakpoint_query_args args;
3509 /* For the moment we don't trust print_one_breakpoint() to not throw
3511 return catch_exceptions (uiout, do_captured_breakpoint_query, &args,
3512 NULL, RETURN_MASK_ALL);
3515 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3516 catchpoints, et.al.). */
3519 user_settable_breakpoint (const struct breakpoint *b)
3521 return (b->type == bp_breakpoint
3522 || b->type == bp_catch_load
3523 || b->type == bp_catch_unload
3524 || b->type == bp_catch_fork
3525 || b->type == bp_catch_vfork
3526 || b->type == bp_catch_exec
3527 || b->type == bp_catch_catch
3528 || b->type == bp_catch_throw
3529 || b->type == bp_hardware_breakpoint
3530 || b->type == bp_watchpoint
3531 || b->type == bp_read_watchpoint
3532 || b->type == bp_access_watchpoint
3533 || b->type == bp_hardware_watchpoint);
3536 /* Print information on user settable breakpoint (watchpoint, etc)
3537 number BNUM. If BNUM is -1 print all user settable breakpoints.
3538 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3541 breakpoint_1 (int bnum, int allflag)
3543 register struct breakpoint *b;
3544 CORE_ADDR last_addr = (CORE_ADDR) -1;
3545 int nr_printable_breakpoints;
3547 /* Compute the number of rows in the table. */
3548 nr_printable_breakpoints = 0;
3551 || bnum == b->number)
3553 if (allflag || user_settable_breakpoint (b))
3554 nr_printable_breakpoints++;
3558 ui_out_table_begin (uiout, 6, nr_printable_breakpoints, "BreakpointTable");
3560 ui_out_table_begin (uiout, 5, nr_printable_breakpoints, "BreakpointTable");
3562 if (nr_printable_breakpoints > 0)
3563 annotate_breakpoints_headers ();
3564 if (nr_printable_breakpoints > 0)
3566 ui_out_table_header (uiout, 3, ui_left, "number", "Num"); /* 1 */
3567 if (nr_printable_breakpoints > 0)
3569 ui_out_table_header (uiout, 14, ui_left, "type", "Type"); /* 2 */
3570 if (nr_printable_breakpoints > 0)
3572 ui_out_table_header (uiout, 4, ui_left, "disp", "Disp"); /* 3 */
3573 if (nr_printable_breakpoints > 0)
3575 ui_out_table_header (uiout, 3, ui_left, "enabled", "Enb"); /* 4 */
3578 if (nr_printable_breakpoints > 0)
3580 if (TARGET_ADDR_BIT <= 32)
3581 ui_out_table_header (uiout, 10, ui_left, "addr", "Address");/* 5 */
3583 ui_out_table_header (uiout, 18, ui_left, "addr", "Address");/* 5 */
3585 if (nr_printable_breakpoints > 0)
3587 ui_out_table_header (uiout, 40, ui_noalign, "what", "What"); /* 6 */
3588 ui_out_table_body (uiout);
3589 if (nr_printable_breakpoints > 0)
3590 annotate_breakpoints_table ();
3594 || bnum == b->number)
3596 /* We only print out user settable breakpoints unless the
3598 if (allflag || user_settable_breakpoint (b))
3599 print_one_breakpoint (b, &last_addr);
3602 ui_out_table_end (uiout);
3604 if (nr_printable_breakpoints == 0)
3607 ui_out_message (uiout, 0, "No breakpoints or watchpoints.\n");
3609 ui_out_message (uiout, 0, "No breakpoint or watchpoint number %d.\n",
3614 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3615 that a comparison of an unsigned with -1 is always false. */
3616 if (last_addr != (CORE_ADDR) -1)
3617 set_next_address (last_addr);
3620 /* FIXME? Should this be moved up so that it is only called when
3621 there have been breakpoints? */
3622 annotate_breakpoints_table_end ();
3627 breakpoints_info (char *bnum_exp, int from_tty)
3632 bnum = parse_and_eval_long (bnum_exp);
3634 breakpoint_1 (bnum, 0);
3639 maintenance_info_breakpoints (char *bnum_exp, int from_tty)
3644 bnum = parse_and_eval_long (bnum_exp);
3646 breakpoint_1 (bnum, 1);
3649 /* Print a message describing any breakpoints set at PC. */
3652 describe_other_breakpoints (CORE_ADDR pc, asection *section)
3654 register int others = 0;
3655 register struct breakpoint *b;
3658 if (b->address == pc) /* address match / overlay match */
3659 if (!overlay_debugging || b->section == section)
3663 printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : "");
3665 if (b->address == pc) /* address match / overlay match */
3666 if (!overlay_debugging || b->section == section)
3669 printf_filtered ("%d%s%s ",
3671 ((b->enable_state == bp_disabled ||
3672 b->enable_state == bp_shlib_disabled ||
3673 b->enable_state == bp_call_disabled)
3675 : b->enable_state == bp_permanent
3679 : ((others == 1) ? " and" : ""));
3681 printf_filtered ("also set at pc ");
3682 print_address_numeric (pc, 1, gdb_stdout);
3683 printf_filtered (".\n");
3687 /* Set the default place to put a breakpoint
3688 for the `break' command with no arguments. */
3691 set_default_breakpoint (int valid, CORE_ADDR addr, struct symtab *symtab,
3694 default_breakpoint_valid = valid;
3695 default_breakpoint_address = addr;
3696 default_breakpoint_symtab = symtab;
3697 default_breakpoint_line = line;
3700 /* Return true iff it is meaningful to use the address member of
3701 BPT. For some breakpoint types, the address member is irrelevant
3702 and it makes no sense to attempt to compare it to other addresses
3703 (or use it for any other purpose either).
3705 More specifically, each of the following breakpoint types will always
3706 have a zero valued address and we don't want check_duplicates() to mark
3707 breakpoints of any of these types to be a duplicate of an actual
3708 breakpoint at address zero:
3711 bp_hardware_watchpoint
3713 bp_access_watchpoint
3720 breakpoint_address_is_meaningful (struct breakpoint *bpt)
3722 enum bptype type = bpt->type;
3724 return (type != bp_watchpoint
3725 && type != bp_hardware_watchpoint
3726 && type != bp_read_watchpoint
3727 && type != bp_access_watchpoint
3728 && type != bp_catch_exec
3729 && type != bp_longjmp_resume
3730 && type != bp_catch_fork
3731 && type != bp_catch_vfork);
3734 /* Rescan breakpoints at the same address and section as BPT,
3735 marking the first one as "first" and any others as "duplicates".
3736 This is so that the bpt instruction is only inserted once.
3737 If we have a permanent breakpoint at the same place as BPT, make
3738 that one the official one, and the rest as duplicates. */
3741 check_duplicates (struct breakpoint *bpt)
3743 register struct breakpoint *b;
3744 register int count = 0;
3745 struct breakpoint *perm_bp = 0;
3746 CORE_ADDR address = bpt->address;
3747 asection *section = bpt->section;
3749 if (! breakpoint_address_is_meaningful (bpt))
3753 if (b->enable_state != bp_disabled
3754 && b->enable_state != bp_shlib_disabled
3755 && b->enable_state != bp_call_disabled
3756 && b->address == address /* address / overlay match */
3757 && (!overlay_debugging || b->section == section)
3758 && breakpoint_address_is_meaningful (b))
3760 /* Have we found a permanent breakpoint? */
3761 if (b->enable_state == bp_permanent)
3768 b->duplicate = count > 1;
3771 /* If we found a permanent breakpoint at this address, go over the
3772 list again and declare all the other breakpoints there to be the
3776 perm_bp->duplicate = 0;
3778 /* Permanent breakpoint should always be inserted. */
3779 if (! perm_bp->inserted)
3780 internal_error (__FILE__, __LINE__,
3781 "allegedly permanent breakpoint is not "
3782 "actually inserted");
3788 internal_error (__FILE__, __LINE__,
3789 "another breakpoint was inserted on top of "
3790 "a permanent breakpoint");
3792 if (b->enable_state != bp_disabled
3793 && b->enable_state != bp_shlib_disabled
3794 && b->enable_state != bp_call_disabled
3795 && b->address == address /* address / overlay match */
3796 && (!overlay_debugging || b->section == section)
3797 && breakpoint_address_is_meaningful (b))
3803 /* set_raw_breakpoint() is a low level routine for allocating and
3804 partially initializing a breakpoint of type BPTYPE. The newly
3805 created breakpoint's address, section, source file name, and line
3806 number are provided by SAL. The newly created and partially
3807 initialized breakpoint is added to the breakpoint chain and
3808 is also returned as the value of this function.
3810 It is expected that the caller will complete the initialization of
3811 the newly created breakpoint struct as well as output any status
3812 information regarding the creation of a new breakpoint. In
3813 particular, set_raw_breakpoint() does NOT set the breakpoint
3814 number! Care should be taken to not allow an error() to occur
3815 prior to completing the initialization of the breakpoint. If this
3816 should happen, a bogus breakpoint will be left on the chain. */
3819 set_raw_breakpoint (struct symtab_and_line sal, enum bptype bptype)
3821 register struct breakpoint *b, *b1;
3823 b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint));
3824 memset (b, 0, sizeof (*b));
3825 b->address = sal.pc;
3826 if (sal.symtab == NULL)
3827 b->source_file = NULL;
3829 b->source_file = savestring (sal.symtab->filename,
3830 strlen (sal.symtab->filename));
3831 b->section = sal.section;
3833 b->language = current_language->la_language;
3834 b->input_radix = input_radix;
3836 b->line_number = sal.line;
3837 b->enable_state = bp_enabled;
3840 b->ignore_count = 0;
3843 b->dll_pathname = NULL;
3844 b->triggered_dll_pathname = NULL;
3845 b->forked_inferior_pid = 0;
3846 b->exec_pathname = NULL;
3848 /* Add this breakpoint to the end of the chain
3849 so that a list of breakpoints will come out in order
3850 of increasing numbers. */
3852 b1 = breakpoint_chain;
3854 breakpoint_chain = b;
3862 check_duplicates (b);
3863 breakpoints_changed ();
3869 /* Note that the breakpoint object B describes a permanent breakpoint
3870 instruction, hard-wired into the inferior's code. */
3872 make_breakpoint_permanent (struct breakpoint *b)
3874 b->enable_state = bp_permanent;
3876 /* By definition, permanent breakpoints are already present in the code. */
3880 static struct breakpoint *
3881 create_internal_breakpoint (CORE_ADDR address, enum bptype type)
3883 static int internal_breakpoint_number = -1;
3884 struct symtab_and_line sal;
3885 struct breakpoint *b;
3887 INIT_SAL (&sal); /* initialize to zeroes */
3890 sal.section = find_pc_overlay (sal.pc);
3892 b = set_raw_breakpoint (sal, type);
3893 b->number = internal_breakpoint_number--;
3894 b->disposition = disp_donttouch;
3901 create_longjmp_breakpoint (char *func_name)
3903 struct breakpoint *b;
3904 struct minimal_symbol *m;
3906 if (func_name == NULL)
3907 b = create_internal_breakpoint (0, bp_longjmp_resume);
3910 if ((m = lookup_minimal_symbol_text (func_name, NULL, NULL)) == NULL)
3913 b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m), bp_longjmp);
3916 b->enable_state = bp_disabled;
3919 b->addr_string = xstrdup (func_name);
3922 /* Call this routine when stepping and nexting to enable a breakpoint
3923 if we do a longjmp(). When we hit that breakpoint, call
3924 set_longjmp_resume_breakpoint() to figure out where we are going. */
3927 enable_longjmp_breakpoint (void)
3929 register struct breakpoint *b;
3932 if (b->type == bp_longjmp)
3934 b->enable_state = bp_enabled;
3935 check_duplicates (b);
3940 disable_longjmp_breakpoint (void)
3942 register struct breakpoint *b;
3945 if (b->type == bp_longjmp
3946 || b->type == bp_longjmp_resume)
3948 b->enable_state = bp_disabled;
3949 check_duplicates (b);
3954 create_overlay_event_breakpoint (char *func_name)
3956 struct breakpoint *b;
3957 struct minimal_symbol *m;
3959 if ((m = lookup_minimal_symbol_text (func_name, NULL, NULL)) == NULL)
3962 b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m),
3964 b->addr_string = xstrdup (func_name);
3966 if (overlay_debugging == ovly_auto)
3968 b->enable_state = bp_enabled;
3969 overlay_events_enabled = 1;
3973 b->enable_state = bp_disabled;
3974 overlay_events_enabled = 0;
3979 enable_overlay_breakpoints (void)
3981 register struct breakpoint *b;
3984 if (b->type == bp_overlay_event)
3986 b->enable_state = bp_enabled;
3987 check_duplicates (b);
3988 overlay_events_enabled = 1;
3993 disable_overlay_breakpoints (void)
3995 register struct breakpoint *b;
3998 if (b->type == bp_overlay_event)
4000 b->enable_state = bp_disabled;
4001 check_duplicates (b);
4002 overlay_events_enabled = 0;
4007 create_thread_event_breakpoint (CORE_ADDR address)
4009 struct breakpoint *b;
4010 char addr_string[80]; /* Surely an addr can't be longer than that. */
4012 b = create_internal_breakpoint (address, bp_thread_event);
4014 b->enable_state = bp_enabled;
4015 /* addr_string has to be used or breakpoint_re_set will delete me. */
4016 sprintf (addr_string, "*0x%s", paddr (b->address));
4017 b->addr_string = xstrdup (addr_string);
4023 remove_thread_event_breakpoints (void)
4025 struct breakpoint *b, *temp;
4027 ALL_BREAKPOINTS_SAFE (b, temp)
4028 if (b->type == bp_thread_event)
4029 delete_breakpoint (b);
4034 remove_solib_event_breakpoints (void)
4036 register struct breakpoint *b, *temp;
4038 ALL_BREAKPOINTS_SAFE (b, temp)
4039 if (b->type == bp_shlib_event)
4040 delete_breakpoint (b);
4044 create_solib_event_breakpoint (CORE_ADDR address)
4046 struct breakpoint *b;
4048 b = create_internal_breakpoint (address, bp_shlib_event);
4052 /* Disable any breakpoints that are on code in shared libraries. Only
4053 apply to enabled breakpoints, disabled ones can just stay disabled. */
4056 disable_breakpoints_in_shlibs (int silent)
4058 struct breakpoint *b;
4059 int disabled_shlib_breaks = 0;
4061 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4064 #if defined (PC_SOLIB)
4065 if (((b->type == bp_breakpoint) ||
4066 (b->type == bp_hardware_breakpoint)) &&
4067 b->enable_state == bp_enabled &&
4069 PC_SOLIB (b->address))
4071 b->enable_state = bp_shlib_disabled;
4074 if (!disabled_shlib_breaks)
4076 target_terminal_ours_for_output ();
4077 warning ("Temporarily disabling shared library breakpoints:");
4079 disabled_shlib_breaks = 1;
4080 warning ("breakpoint #%d ", b->number);
4087 /* Try to reenable any breakpoints in shared libraries. */
4089 re_enable_breakpoints_in_shlibs (void)
4091 struct breakpoint *b;
4094 if (b->enable_state == bp_shlib_disabled)
4098 /* Do not reenable the breakpoint if the shared library
4099 is still not mapped in. */
4100 if (target_read_memory (b->address, buf, 1) == 0)
4101 b->enable_state = bp_enabled;
4108 solib_load_unload_1 (char *hookname, int tempflag, char *dll_pathname,
4109 char *cond_string, enum bptype bp_kind)
4111 struct breakpoint *b;
4112 struct symtabs_and_lines sals;
4113 struct cleanup *old_chain;
4114 struct cleanup *canonical_strings_chain = NULL;
4115 char *addr_start = hookname;
4116 char *addr_end = NULL;
4117 char **canonical = (char **) NULL;
4118 int thread = -1; /* All threads. */
4120 /* Set a breakpoint on the specified hook. */
4121 sals = decode_line_1 (&hookname, 1, (struct symtab *) NULL, 0, &canonical);
4122 addr_end = hookname;
4124 if (sals.nelts == 0)
4126 warning ("Unable to set a breakpoint on dynamic linker callback.");
4127 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4128 warning ("GDB will be unable to track shl_load/shl_unload calls");
4131 if (sals.nelts != 1)
4133 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4134 warning ("GDB will be unable to track shl_load/shl_unload calls");
4138 /* Make sure that all storage allocated in decode_line_1 gets freed
4139 in case the following errors out. */
4140 old_chain = make_cleanup (xfree, sals.sals);
4141 if (canonical != (char **) NULL)
4143 make_cleanup (xfree, canonical);
4144 canonical_strings_chain = make_cleanup (null_cleanup, 0);
4145 if (canonical[0] != NULL)
4146 make_cleanup (xfree, canonical[0]);
4149 resolve_sal_pc (&sals.sals[0]);
4151 /* Remove the canonical strings from the cleanup, they are needed below. */
4152 if (canonical != (char **) NULL)
4153 discard_cleanups (canonical_strings_chain);
4155 b = set_raw_breakpoint (sals.sals[0], bp_kind);
4156 set_breakpoint_count (breakpoint_count + 1);
4157 b->number = breakpoint_count;
4159 b->cond_string = (cond_string == NULL) ?
4160 NULL : savestring (cond_string, strlen (cond_string));
4163 if (canonical != (char **) NULL && canonical[0] != NULL)
4164 b->addr_string = canonical[0];
4165 else if (addr_start)
4166 b->addr_string = savestring (addr_start, addr_end - addr_start);
4168 b->enable_state = bp_enabled;
4169 b->disposition = tempflag ? disp_del : disp_donttouch;
4171 if (dll_pathname == NULL)
4172 b->dll_pathname = NULL;
4175 b->dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1);
4176 strcpy (b->dll_pathname, dll_pathname);
4180 do_cleanups (old_chain);
4184 create_solib_load_event_breakpoint (char *hookname, int tempflag,
4185 char *dll_pathname, char *cond_string)
4187 solib_load_unload_1 (hookname, tempflag, dll_pathname,
4188 cond_string, bp_catch_load);
4192 create_solib_unload_event_breakpoint (char *hookname, int tempflag,
4193 char *dll_pathname, char *cond_string)
4195 solib_load_unload_1 (hookname,tempflag, dll_pathname,
4196 cond_string, bp_catch_unload);
4200 create_fork_vfork_event_catchpoint (int tempflag, char *cond_string,
4201 enum bptype bp_kind)
4203 struct symtab_and_line sal;
4204 struct breakpoint *b;
4205 int thread = -1; /* All threads. */
4212 b = set_raw_breakpoint (sal, bp_kind);
4213 set_breakpoint_count (breakpoint_count + 1);
4214 b->number = breakpoint_count;
4216 b->cond_string = (cond_string == NULL) ?
4217 NULL : savestring (cond_string, strlen (cond_string));
4219 b->addr_string = NULL;
4220 b->enable_state = bp_enabled;
4221 b->disposition = tempflag ? disp_del : disp_donttouch;
4222 b->forked_inferior_pid = 0;
4228 create_fork_event_catchpoint (int tempflag, char *cond_string)
4230 create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_fork);
4234 create_vfork_event_catchpoint (int tempflag, char *cond_string)
4236 create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_vfork);
4240 create_exec_event_catchpoint (int tempflag, char *cond_string)
4242 struct symtab_and_line sal;
4243 struct breakpoint *b;
4244 int thread = -1; /* All threads. */
4251 b = set_raw_breakpoint (sal, bp_catch_exec);
4252 set_breakpoint_count (breakpoint_count + 1);
4253 b->number = breakpoint_count;
4255 b->cond_string = (cond_string == NULL) ?
4256 NULL : savestring (cond_string, strlen (cond_string));
4258 b->addr_string = NULL;
4259 b->enable_state = bp_enabled;
4260 b->disposition = tempflag ? disp_del : disp_donttouch;
4266 hw_breakpoint_used_count (void)
4268 register struct breakpoint *b;
4273 if (b->type == bp_hardware_breakpoint && b->enable_state == bp_enabled)
4281 hw_watchpoint_used_count (enum bptype type, int *other_type_used)
4283 register struct breakpoint *b;
4286 *other_type_used = 0;
4289 if (b->enable_state == bp_enabled)
4291 if (b->type == type)
4293 else if ((b->type == bp_hardware_watchpoint ||
4294 b->type == bp_read_watchpoint ||
4295 b->type == bp_access_watchpoint)
4296 && b->enable_state == bp_enabled)
4297 *other_type_used = 1;
4303 /* Call this after hitting the longjmp() breakpoint. Use this to set
4304 a new breakpoint at the target of the jmp_buf.
4306 FIXME - This ought to be done by setting a temporary breakpoint
4307 that gets deleted automatically... */
4310 set_longjmp_resume_breakpoint (CORE_ADDR pc, struct frame_info *frame)
4312 register struct breakpoint *b;
4315 if (b->type == bp_longjmp_resume)
4318 b->enable_state = bp_enabled;
4320 b->frame = frame->frame;
4323 check_duplicates (b);
4329 disable_watchpoints_before_interactive_call_start (void)
4331 struct breakpoint *b;
4335 if (((b->type == bp_watchpoint)
4336 || (b->type == bp_hardware_watchpoint)
4337 || (b->type == bp_read_watchpoint)
4338 || (b->type == bp_access_watchpoint)
4339 || ep_is_exception_catchpoint (b))
4340 && (b->enable_state == bp_enabled))
4342 b->enable_state = bp_call_disabled;
4343 check_duplicates (b);
4349 enable_watchpoints_after_interactive_call_stop (void)
4351 struct breakpoint *b;
4355 if (((b->type == bp_watchpoint)
4356 || (b->type == bp_hardware_watchpoint)
4357 || (b->type == bp_read_watchpoint)
4358 || (b->type == bp_access_watchpoint)
4359 || ep_is_exception_catchpoint (b))
4360 && (b->enable_state == bp_call_disabled))
4362 b->enable_state = bp_enabled;
4363 check_duplicates (b);
4369 /* Set a breakpoint that will evaporate an end of command
4370 at address specified by SAL.
4371 Restrict it to frame FRAME if FRAME is nonzero. */
4374 set_momentary_breakpoint (struct symtab_and_line sal, struct frame_info *frame,
4377 register struct breakpoint *b;
4378 b = set_raw_breakpoint (sal, type);
4379 b->enable_state = bp_enabled;
4380 b->disposition = disp_donttouch;
4381 b->frame = (frame ? frame->frame : 0);
4383 /* If we're debugging a multi-threaded program, then we
4384 want momentary breakpoints to be active in only a
4385 single thread of control. */
4386 if (in_thread_list (inferior_ptid))
4387 b->thread = pid_to_thread_id (inferior_ptid);
4393 /* Tell the user we have just set a breakpoint B. */
4396 mention (struct breakpoint *b)
4399 struct cleanup *old_chain;
4400 struct ui_stream *stb;
4402 stb = ui_out_stream_new (uiout);
4403 old_chain = make_cleanup_ui_out_stream_delete (stb);
4405 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4406 watchpoint) other than breakpoint creation. It should be possible to
4407 clean this up and at the same time replace the random calls to
4408 breakpoint_changed with this hook, as has already been done for
4409 delete_breakpoint_hook and so on. */
4410 if (create_breakpoint_hook)
4411 create_breakpoint_hook (b);
4412 breakpoint_create_event (b->number);
4417 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b->number);
4420 ui_out_text (uiout, "Watchpoint ");
4421 ui_out_tuple_begin (uiout, "wpt");
4422 ui_out_field_int (uiout, "number", b->number);
4423 ui_out_text (uiout, ": ");
4424 print_expression (b->exp, stb->stream);
4425 ui_out_field_stream (uiout, "exp", stb);
4426 ui_out_tuple_end (uiout);
4428 case bp_hardware_watchpoint:
4429 ui_out_text (uiout, "Hardware watchpoint ");
4430 ui_out_tuple_begin (uiout, "wpt");
4431 ui_out_field_int (uiout, "number", b->number);
4432 ui_out_text (uiout, ": ");
4433 print_expression (b->exp, stb->stream);
4434 ui_out_field_stream (uiout, "exp", stb);
4435 ui_out_tuple_end (uiout);
4437 case bp_read_watchpoint:
4438 ui_out_text (uiout, "Hardware read watchpoint ");
4439 ui_out_tuple_begin (uiout, "hw-rwpt");
4440 ui_out_field_int (uiout, "number", b->number);
4441 ui_out_text (uiout, ": ");
4442 print_expression (b->exp, stb->stream);
4443 ui_out_field_stream (uiout, "exp", stb);
4444 ui_out_tuple_end (uiout);
4446 case bp_access_watchpoint:
4447 ui_out_text (uiout, "Hardware access (read/write) watchpoint ");
4448 ui_out_tuple_begin (uiout, "hw-awpt");
4449 ui_out_field_int (uiout, "number", b->number);
4450 ui_out_text (uiout, ": ");
4451 print_expression (b->exp, stb->stream);
4452 ui_out_field_stream (uiout, "exp", stb);
4453 ui_out_tuple_end (uiout);
4456 if (ui_out_is_mi_like_p (uiout))
4461 printf_filtered ("Breakpoint %d", b->number);
4464 case bp_hardware_breakpoint:
4465 if (ui_out_is_mi_like_p (uiout))
4470 printf_filtered ("Hardware assisted breakpoint %d", b->number);
4474 case bp_catch_unload:
4475 printf_filtered ("Catchpoint %d (%s %s)",
4477 (b->type == bp_catch_load) ? "load" : "unload",
4478 (b->dll_pathname != NULL) ?
4479 b->dll_pathname : "<any library>");
4482 case bp_catch_vfork:
4483 printf_filtered ("Catchpoint %d (%s)",
4485 (b->type == bp_catch_fork) ? "fork" : "vfork");
4488 printf_filtered ("Catchpoint %d (exec)",
4491 case bp_catch_catch:
4492 case bp_catch_throw:
4493 printf_filtered ("Catchpoint %d (%s)",
4495 (b->type == bp_catch_catch) ? "catch" : "throw");
4501 case bp_longjmp_resume:
4502 case bp_step_resume:
4503 case bp_through_sigtramp:
4505 case bp_watchpoint_scope:
4506 case bp_shlib_event:
4507 case bp_thread_event:
4508 case bp_overlay_event:
4513 if (addressprint || b->source_file == NULL)
4515 printf_filtered (" at ");
4516 print_address_numeric (b->address, 1, gdb_stdout);
4519 printf_filtered (": file %s, line %d.",
4520 b->source_file, b->line_number);
4522 do_cleanups (old_chain);
4523 if (ui_out_is_mi_like_p (uiout))
4525 printf_filtered ("\n");
4529 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4530 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4531 COND[i] and COND_STRING[i] values.
4533 NOTE: If the function succeeds, the caller is expected to cleanup
4534 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4535 array contents). If the function fails (error() is called), the
4536 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4537 COND and SALS arrays and each of those arrays contents. */
4540 create_breakpoints (struct symtabs_and_lines sals, char **addr_string,
4541 struct expression **cond, char **cond_string,
4542 enum bptype type, enum bpdisp disposition,
4543 int thread, int ignore_count, int from_tty)
4545 if (type == bp_hardware_breakpoint)
4547 int i = hw_breakpoint_used_count ();
4548 int target_resources_ok =
4549 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,
4551 if (target_resources_ok == 0)
4552 error ("No hardware breakpoint support in the target.");
4553 else if (target_resources_ok < 0)
4554 error ("Hardware breakpoints used exceeds limit.");
4557 /* Now set all the breakpoints. */
4560 for (i = 0; i < sals.nelts; i++)
4562 struct breakpoint *b;
4563 struct symtab_and_line sal = sals.sals[i];
4566 describe_other_breakpoints (sal.pc, sal.section);
4568 b = set_raw_breakpoint (sal, type);
4569 set_breakpoint_count (breakpoint_count + 1);
4570 b->number = breakpoint_count;
4573 b->addr_string = addr_string[i];
4574 b->cond_string = cond_string[i];
4575 b->ignore_count = ignore_count;
4576 b->enable_state = bp_enabled;
4577 b->disposition = disposition;
4583 /* Parse ARG which is assumed to be a SAL specification possibly
4584 followed by conditionals. On return, SALS contains an array of SAL
4585 addresses found. ADDR_STRING contains a vector of (canonical)
4586 address strings. ARG points to the end of the SAL. */
4589 parse_breakpoint_sals (char **address,
4590 struct symtabs_and_lines *sals,
4591 char ***addr_string)
4593 char *addr_start = *address;
4594 *addr_string = NULL;
4595 /* If no arg given, or if first arg is 'if ', use the default
4597 if ((*address) == NULL
4598 || (strncmp ((*address), "if", 2) == 0 && isspace ((*address)[2])))
4600 if (default_breakpoint_valid)
4602 struct symtab_and_line sal;
4603 INIT_SAL (&sal); /* initialize to zeroes */
4604 sals->sals = (struct symtab_and_line *)
4605 xmalloc (sizeof (struct symtab_and_line));
4606 sal.pc = default_breakpoint_address;
4607 sal.line = default_breakpoint_line;
4608 sal.symtab = default_breakpoint_symtab;
4609 sal.section = find_pc_overlay (sal.pc);
4610 sals->sals[0] = sal;
4614 error ("No default breakpoint address now.");
4618 /* Force almost all breakpoints to be in terms of the
4619 current_source_symtab (which is decode_line_1's default). This
4620 should produce the results we want almost all of the time while
4621 leaving default_breakpoint_* alone. */
4623 struct symtab_and_line cursal = get_current_source_symtab_and_line ();
4625 if (default_breakpoint_valid
4627 || (strchr ("+-", (*address)[0]) != NULL)))
4628 *sals = decode_line_1 (address, 1, default_breakpoint_symtab,
4629 default_breakpoint_line, addr_string);
4631 *sals = decode_line_1 (address, 1, (struct symtab *) NULL, 0, addr_string);
4633 /* For any SAL that didn't have a canonical string, fill one in. */
4634 if (sals->nelts > 0 && *addr_string == NULL)
4635 *addr_string = xcalloc (sals->nelts, sizeof (char **));
4636 if (addr_start != (*address))
4639 for (i = 0; i < sals->nelts; i++)
4641 /* Add the string if not present. */
4642 if ((*addr_string)[i] == NULL)
4643 (*addr_string)[i] = savestring (addr_start, (*address) - addr_start);
4649 /* Convert each SAL into a real PC. Verify that the PC can be
4650 inserted as a breakpoint. If it can't throw an error. */
4653 breakpoint_sals_to_pc (struct symtabs_and_lines *sals,
4657 for (i = 0; i < sals->nelts; i++)
4659 resolve_sal_pc (&sals->sals[i]);
4661 /* It's possible for the PC to be nonzero, but still an illegal
4662 value on some targets.
4664 For example, on HP-UX if you start gdb, and before running the
4665 inferior you try to set a breakpoint on a shared library function
4666 "foo" where the inferior doesn't call "foo" directly but does
4667 pass its address to another function call, then we do find a
4668 minimal symbol for the "foo", but it's address is invalid.
4669 (Appears to be an index into a table that the loader sets up
4670 when the inferior is run.)
4672 Give the target a chance to bless sals.sals[i].pc before we
4673 try to make a breakpoint for it. */
4674 if (PC_REQUIRES_RUN_BEFORE_USE (sals->sals[i].pc))
4676 if (address == NULL)
4677 error ("Cannot break without a running program.");
4679 error ("Cannot break on %s without a running program.",
4685 /* Set a breakpoint according to ARG (function, linenum or *address)
4686 flag: first bit : 0 non-temporary, 1 temporary.
4687 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4690 break_command_1 (char *arg, int flag, int from_tty)
4692 int tempflag, hardwareflag;
4693 struct symtabs_and_lines sals;
4694 register struct expression **cond = 0;
4695 /* Pointers in arg to the start, and one past the end, of the
4697 char **cond_string = (char **) NULL;
4698 char *addr_start = arg;
4700 struct cleanup *old_chain;
4701 struct cleanup *breakpoint_chain = NULL;
4704 int ignore_count = 0;
4706 hardwareflag = flag & BP_HARDWAREFLAG;
4707 tempflag = flag & BP_TEMPFLAG;
4712 parse_breakpoint_sals (&arg, &sals, &addr_string);
4717 /* Create a chain of things that always need to be cleaned up. */
4718 old_chain = make_cleanup (null_cleanup, 0);
4720 /* Make sure that all storage allocated to SALS gets freed. */
4721 make_cleanup (xfree, sals.sals);
4723 /* Cleanup the addr_string array but not its contents. */
4724 make_cleanup (xfree, addr_string);
4726 /* Allocate space for all the cond expressions. */
4727 cond = xcalloc (sals.nelts, sizeof (struct expression *));
4728 make_cleanup (xfree, cond);
4730 /* Allocate space for all the cond strings. */
4731 cond_string = xcalloc (sals.nelts, sizeof (char **));
4732 make_cleanup (xfree, cond_string);
4734 /* ----------------------------- SNIP -----------------------------
4735 Anything added to the cleanup chain beyond this point is assumed
4736 to be part of a breakpoint. If the breakpoint create succeeds
4737 then the memory is not reclaimed. */
4738 breakpoint_chain = make_cleanup (null_cleanup, 0);
4740 /* Mark the contents of the addr_string for cleanup. These go on
4741 the breakpoint_chain and only occure if the breakpoint create
4743 for (i = 0; i < sals.nelts; i++)
4745 if (addr_string[i] != NULL)
4746 make_cleanup (xfree, addr_string[i]);
4749 /* Resolve all line numbers to PC's and verify that the addresses
4750 are ok for the target. */
4751 breakpoint_sals_to_pc (&sals, addr_start);
4753 /* Verify that condition can be parsed, before setting any
4754 breakpoints. Allocate a separate condition expression for each
4756 thread = -1; /* No specific thread yet */
4757 for (i = 0; i < sals.nelts; i++)
4764 char *cond_start = NULL;
4765 char *cond_end = NULL;
4766 while (*tok == ' ' || *tok == '\t')
4771 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
4774 toklen = end_tok - tok;
4776 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
4778 tok = cond_start = end_tok + 1;
4779 cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
4780 make_cleanup (xfree, cond[i]);
4782 cond_string[i] = savestring (cond_start, cond_end - cond_start);
4783 make_cleanup (xfree, cond_string[i]);
4785 else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
4791 thread = strtol (tok, &tok, 0);
4793 error ("Junk after thread keyword.");
4794 if (!valid_thread_id (thread))
4795 error ("Unknown thread %d\n", thread);
4798 error ("Junk at end of arguments.");
4802 create_breakpoints (sals, addr_string, cond, cond_string,
4803 hardwareflag ? bp_hardware_breakpoint : bp_breakpoint,
4804 tempflag ? disp_del : disp_donttouch,
4805 thread, ignore_count, from_tty);
4809 warning ("Multiple breakpoints were set.");
4810 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
4812 /* That's it. Discard the cleanups for data inserted into the
4814 discard_cleanups (breakpoint_chain);
4815 /* But cleanup everything else. */
4816 do_cleanups (old_chain);
4819 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
4820 linenum or *address) with COND and IGNORE_COUNT. */
4822 struct captured_breakpoint_args
4833 do_captured_breakpoint (void *data)
4835 struct captured_breakpoint_args *args = data;
4836 struct symtabs_and_lines sals;
4837 register struct expression **cond;
4838 struct cleanup *old_chain;
4839 struct cleanup *breakpoint_chain = NULL;
4846 /* Parse the source and lines spec. Delay check that the expression
4847 didn't contain trailing garbage until after cleanups are in
4851 address_end = args->address;
4853 parse_breakpoint_sals (&address_end, &sals, &addr_string);
4858 /* Create a chain of things at always need to be cleaned up. */
4859 old_chain = make_cleanup (null_cleanup, 0);
4861 /* Always have a addr_string array, even if it is empty. */
4862 make_cleanup (xfree, addr_string);
4864 /* Make sure that all storage allocated to SALS gets freed. */
4865 make_cleanup (xfree, sals.sals);
4867 /* Allocate space for all the cond expressions. */
4868 cond = xcalloc (sals.nelts, sizeof (struct expression *));
4869 make_cleanup (xfree, cond);
4871 /* Allocate space for all the cond strings. */
4872 cond_string = xcalloc (sals.nelts, sizeof (char **));
4873 make_cleanup (xfree, cond_string);
4875 /* ----------------------------- SNIP -----------------------------
4876 Anything added to the cleanup chain beyond this point is assumed
4877 to be part of a breakpoint. If the breakpoint create goes
4878 through then that memory is not cleaned up. */
4879 breakpoint_chain = make_cleanup (null_cleanup, 0);
4881 /* Mark the contents of the addr_string for cleanup. These go on
4882 the breakpoint_chain and only occure if the breakpoint create
4884 for (i = 0; i < sals.nelts; i++)
4886 if (addr_string[i] != NULL)
4887 make_cleanup (xfree, addr_string[i]);
4890 /* Wait until now before checking for garbage at the end of the
4891 address. That way cleanups can take care of freeing any
4893 if (*address_end != '\0')
4894 error ("Garbage %s following breakpoint address", address_end);
4896 /* Resolve all line numbers to PC's. */
4897 breakpoint_sals_to_pc (&sals, args->address);
4899 /* Verify that conditions can be parsed, before setting any
4901 for (i = 0; i < sals.nelts; i++)
4903 if (args->condition != NULL)
4905 char *tok = args->condition;
4906 cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
4908 error ("Garbage %s follows condition", tok);
4909 make_cleanup (xfree, cond[i]);
4910 cond_string[i] = xstrdup (args->condition);
4914 create_breakpoints (sals, addr_string, cond, cond_string,
4915 args->hardwareflag ? bp_hardware_breakpoint : bp_breakpoint,
4916 args->tempflag ? disp_del : disp_donttouch,
4917 args->thread, args->ignore_count, 0/*from-tty*/);
4919 /* That's it. Discard the cleanups for data inserted into the
4921 discard_cleanups (breakpoint_chain);
4922 /* But cleanup everything else. */
4923 do_cleanups (old_chain);
4928 gdb_breakpoint (char *address, char *condition,
4929 int hardwareflag, int tempflag,
4930 int thread, int ignore_count)
4932 struct captured_breakpoint_args args;
4933 args.address = address;
4934 args.condition = condition;
4935 args.hardwareflag = hardwareflag;
4936 args.tempflag = tempflag;
4937 args.thread = thread;
4938 args.ignore_count = ignore_count;
4939 return catch_errors (do_captured_breakpoint, &args,
4940 NULL, RETURN_MASK_ALL);
4945 break_at_finish_at_depth_command_1 (char *arg, int flag, int from_tty)
4947 struct frame_info *frame;
4948 CORE_ADDR low, high, selected_pc = 0;
4949 char *extra_args = NULL;
4952 int extra_args_len = 0, if_arg = 0;
4955 (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
4958 if (default_breakpoint_valid)
4962 selected_pc = selected_frame->pc;
4967 error ("No selected frame.");
4970 error ("No default breakpoint address now.");
4974 extra_args = strchr (arg, ' ');
4978 extra_args_len = strlen (extra_args);
4979 level_arg = (char *) xmalloc (extra_args - arg);
4980 strncpy (level_arg, arg, extra_args - arg - 1);
4981 level_arg[extra_args - arg - 1] = '\0';
4985 level_arg = (char *) xmalloc (strlen (arg) + 1);
4986 strcpy (level_arg, arg);
4989 frame = parse_frame_specification (level_arg);
4991 selected_pc = frame->pc;
4998 extra_args_len = strlen (arg);
5003 if (find_pc_partial_function (selected_pc, (char **) NULL, &low, &high))
5005 addr_string = (char *) xmalloc (26 + extra_args_len);
5007 sprintf (addr_string, "*0x%s %s", paddr_nz (high), extra_args);
5009 sprintf (addr_string, "*0x%s", paddr_nz (high));
5010 break_command_1 (addr_string, flag, from_tty);
5011 xfree (addr_string);
5014 error ("No function contains the specified address");
5017 error ("Unable to set breakpoint at procedure exit");
5022 break_at_finish_command_1 (char *arg, int flag, int from_tty)
5024 char *addr_string, *break_string, *beg_addr_string;
5025 CORE_ADDR low, high;
5026 struct symtabs_and_lines sals;
5027 struct symtab_and_line sal;
5028 struct cleanup *old_chain;
5029 char *extra_args = NULL;
5030 int extra_args_len = 0;
5034 (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
5036 if (default_breakpoint_valid)
5040 addr_string = (char *) xmalloc (15);
5041 sprintf (addr_string, "*0x%s", paddr_nz (selected_frame->pc));
5046 error ("No selected frame.");
5049 error ("No default breakpoint address now.");
5053 addr_string = (char *) xmalloc (strlen (arg) + 1);
5054 strcpy (addr_string, arg);
5060 extra_args_len = strlen (arg);
5064 /* get the stuff after the function name or address */
5065 extra_args = strchr (arg, ' ');
5069 extra_args_len = strlen (extra_args);
5076 beg_addr_string = addr_string;
5077 sals = decode_line_1 (&addr_string, 1, (struct symtab *) NULL, 0,
5080 xfree (beg_addr_string);
5081 old_chain = make_cleanup (xfree, sals.sals);
5082 for (i = 0; (i < sals.nelts); i++)
5085 if (find_pc_partial_function (sal.pc, (char **) NULL, &low, &high))
5087 break_string = (char *) xmalloc (extra_args_len + 26);
5089 sprintf (break_string, "*0x%s %s", paddr_nz (high), extra_args);
5091 sprintf (break_string, "*0x%s", paddr_nz (high));
5092 break_command_1 (break_string, flag, from_tty);
5093 xfree (break_string);
5096 error ("No function contains the specified address");
5100 warning ("Multiple breakpoints were set.\n");
5101 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5103 do_cleanups (old_chain);
5107 /* Helper function for break_command_1 and disassemble_command. */
5110 resolve_sal_pc (struct symtab_and_line *sal)
5114 if (sal->pc == 0 && sal->symtab != NULL)
5116 if (!find_line_pc (sal->symtab, sal->line, &pc))
5117 error ("No line %d in file \"%s\".",
5118 sal->line, sal->symtab->filename);
5122 if (sal->section == 0 && sal->symtab != NULL)
5124 struct blockvector *bv;
5129 bv = blockvector_for_pc_sect (sal->pc, 0, &index, sal->symtab);
5132 b = BLOCKVECTOR_BLOCK (bv, index);
5133 sym = block_function (b);
5136 fixup_symbol_section (sym, sal->symtab->objfile);
5137 sal->section = SYMBOL_BFD_SECTION (sym);
5141 /* It really is worthwhile to have the section, so we'll just
5142 have to look harder. This case can be executed if we have
5143 line numbers but no functions (as can happen in assembly
5146 struct minimal_symbol *msym;
5148 msym = lookup_minimal_symbol_by_pc (sal->pc);
5150 sal->section = SYMBOL_BFD_SECTION (msym);
5157 break_command (char *arg, int from_tty)
5159 break_command_1 (arg, 0, from_tty);
5163 break_at_finish_command (char *arg, int from_tty)
5165 break_at_finish_command_1 (arg, 0, from_tty);
5169 break_at_finish_at_depth_command (char *arg, int from_tty)
5171 break_at_finish_at_depth_command_1 (arg, 0, from_tty);
5175 tbreak_command (char *arg, int from_tty)
5177 break_command_1 (arg, BP_TEMPFLAG, from_tty);
5181 tbreak_at_finish_command (char *arg, int from_tty)
5183 break_at_finish_command_1 (arg, BP_TEMPFLAG, from_tty);
5187 hbreak_command (char *arg, int from_tty)
5189 break_command_1 (arg, BP_HARDWAREFLAG, from_tty);
5193 thbreak_command (char *arg, int from_tty)
5195 break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty);
5199 stop_command (char *arg, int from_tty)
5201 printf_filtered ("Specify the type of breakpoint to set.\n\
5202 Usage: stop in <function | address>\n\
5207 stopin_command (char *arg, int from_tty)
5211 if (arg == (char *) NULL)
5213 else if (*arg != '*')
5218 /* look for a ':'. If this is a line number specification, then
5219 say it is bad, otherwise, it should be an address or
5220 function/method name */
5221 while (*argptr && !hasColon)
5223 hasColon = (*argptr == ':');
5228 badInput = (*argptr != ':'); /* Not a class::method */
5230 badInput = isdigit (*arg); /* a simple line number */
5234 printf_filtered ("Usage: stop in <function | address>\n");
5236 break_command_1 (arg, 0, from_tty);
5240 stopat_command (char *arg, int from_tty)
5244 if (arg == (char *) NULL || *arg == '*') /* no line number */
5251 /* look for a ':'. If there is a '::' then get out, otherwise
5252 it is probably a line number. */
5253 while (*argptr && !hasColon)
5255 hasColon = (*argptr == ':');
5260 badInput = (*argptr == ':'); /* we have class::method */
5262 badInput = !isdigit (*arg); /* not a line number */
5266 printf_filtered ("Usage: stop at <line>\n");
5268 break_command_1 (arg, 0, from_tty);
5272 /* accessflag: hw_write: watch write,
5273 hw_read: watch read,
5274 hw_access: watch access (read or write) */
5276 watch_command_1 (char *arg, int accessflag, int from_tty)
5278 struct breakpoint *b;
5279 struct symtab_and_line sal;
5280 struct expression *exp;
5281 struct block *exp_valid_block;
5282 struct value *val, *mark;
5283 struct frame_info *frame;
5284 struct frame_info *prev_frame = NULL;
5285 char *exp_start = NULL;
5286 char *exp_end = NULL;
5287 char *tok, *end_tok;
5289 char *cond_start = NULL;
5290 char *cond_end = NULL;
5291 struct expression *cond = NULL;
5292 int i, other_type_used, target_resources_ok = 0;
5293 enum bptype bp_type;
5296 INIT_SAL (&sal); /* initialize to zeroes */
5298 /* Parse arguments. */
5299 innermost_block = NULL;
5301 exp = parse_exp_1 (&arg, 0, 0);
5303 exp_valid_block = innermost_block;
5304 mark = value_mark ();
5305 val = evaluate_expression (exp);
5306 release_value (val);
5307 if (VALUE_LAZY (val))
5308 value_fetch_lazy (val);
5311 while (*tok == ' ' || *tok == '\t')
5315 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
5318 toklen = end_tok - tok;
5319 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
5321 tok = cond_start = end_tok + 1;
5322 cond = parse_exp_1 (&tok, 0, 0);
5326 error ("Junk at end of command.");
5328 if (accessflag == hw_read)
5329 bp_type = bp_read_watchpoint;
5330 else if (accessflag == hw_access)
5331 bp_type = bp_access_watchpoint;
5333 bp_type = bp_hardware_watchpoint;
5335 mem_cnt = can_use_hardware_watchpoint (val);
5336 if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint)
5337 error ("Expression cannot be implemented with read/access watchpoint.");
5340 i = hw_watchpoint_used_count (bp_type, &other_type_used);
5341 target_resources_ok =
5342 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type, i + mem_cnt,
5344 if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint)
5345 error ("Target does not support this type of hardware watchpoint.");
5347 if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint)
5348 error ("Target can only support one kind of HW watchpoint at a time.");
5351 #if defined(HPUXHPPA)
5352 /* On HP-UX if you set a h/w
5353 watchpoint before the "run" command, the inferior dies with a e.g.,
5354 SIGILL once you start it. I initially believed this was due to a
5355 bad interaction between page protection traps and the initial
5356 startup sequence by the dynamic linker.
5358 However, I tried avoiding that by having HP-UX's implementation of
5359 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5360 yet, which forced slow watches before a "run" or "attach", and it
5361 still fails somewhere in the startup code.
5363 Until I figure out what's happening, I'm disallowing watches altogether
5364 before the "run" or "attach" command. We'll tell the user they must
5365 set watches after getting the program started. */
5366 if (!target_has_execution)
5368 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5371 #endif /* HPUXHPPA */
5373 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5374 watchpoint could not be set. */
5375 if (!mem_cnt || target_resources_ok <= 0)
5376 bp_type = bp_watchpoint;
5378 /* Now set up the breakpoint. */
5379 b = set_raw_breakpoint (sal, bp_type);
5380 set_breakpoint_count (breakpoint_count + 1);
5381 b->number = breakpoint_count;
5382 b->disposition = disp_donttouch;
5384 b->exp_valid_block = exp_valid_block;
5385 b->exp_string = savestring (exp_start, exp_end - exp_start);
5389 b->cond_string = savestring (cond_start, cond_end - cond_start);
5393 frame = block_innermost_frame (exp_valid_block);
5396 prev_frame = get_prev_frame (frame);
5397 get_frame_id (frame, &b->watchpoint_frame);
5401 memset (&b->watchpoint_frame, 0, sizeof (b->watchpoint_frame));
5404 /* If the expression is "local", then set up a "watchpoint scope"
5405 breakpoint at the point where we've left the scope of the watchpoint
5407 if (innermost_block)
5411 struct breakpoint *scope_breakpoint;
5412 scope_breakpoint = create_internal_breakpoint (get_frame_pc (prev_frame),
5413 bp_watchpoint_scope);
5415 scope_breakpoint->enable_state = bp_enabled;
5417 /* Automatically delete the breakpoint when it hits. */
5418 scope_breakpoint->disposition = disp_del;
5420 /* Only break in the proper frame (help with recursion). */
5421 scope_breakpoint->frame = prev_frame->frame;
5423 /* Set the address at which we will stop. */
5424 scope_breakpoint->address = get_frame_pc (prev_frame);
5426 /* The scope breakpoint is related to the watchpoint. We
5427 will need to act on them together. */
5428 b->related_breakpoint = scope_breakpoint;
5431 value_free_to_mark (mark);
5435 /* Return count of locations need to be watched and can be handled
5436 in hardware. If the watchpoint can not be handled
5437 in hardware return zero. */
5439 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5440 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5441 ((BYTE_SIZE) <= (REGISTER_SIZE))
5444 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5445 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5446 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5450 can_use_hardware_watchpoint (struct value *v)
5452 int found_memory_cnt = 0;
5453 struct value *head = v;
5455 /* Did the user specifically forbid us to use hardware watchpoints? */
5456 if (!can_use_hw_watchpoints)
5459 /* Make sure that the value of the expression depends only upon
5460 memory contents, and values computed from them within GDB. If we
5461 find any register references or function calls, we can't use a
5462 hardware watchpoint.
5464 The idea here is that evaluating an expression generates a series
5465 of values, one holding the value of every subexpression. (The
5466 expression a*b+c has five subexpressions: a, b, a*b, c, and
5467 a*b+c.) GDB's values hold almost enough information to establish
5468 the criteria given above --- they identify memory lvalues,
5469 register lvalues, computed values, etcetera. So we can evaluate
5470 the expression, and then scan the chain of values that leaves
5471 behind to decide whether we can detect any possible change to the
5472 expression's final value using only hardware watchpoints.
5474 However, I don't think that the values returned by inferior
5475 function calls are special in any way. So this function may not
5476 notice that an expression involving an inferior function call
5477 can't be watched with hardware watchpoints. FIXME. */
5478 for (; v; v = v->next)
5480 if (VALUE_LVAL (v) == lval_memory)
5483 /* A lazy memory lvalue is one that GDB never needed to fetch;
5484 we either just used its address (e.g., `a' in `a.b') or
5485 we never needed it at all (e.g., `a' in `a,b'). */
5489 /* Ahh, memory we actually used! Check if we can cover
5490 it with hardware watchpoints. */
5491 struct type *vtype = check_typedef (VALUE_TYPE (v));
5493 /* We only watch structs and arrays if user asked for it
5494 explicitly, never if they just happen to appear in a
5495 middle of some value chain. */
5497 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
5498 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
5500 CORE_ADDR vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
5501 int len = TYPE_LENGTH (VALUE_TYPE (v));
5503 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr, len))
5510 else if (v->lval != not_lval && v->modifiable == 0)
5511 return 0; /* ??? What does this represent? */
5512 else if (v->lval == lval_register)
5513 return 0; /* cannot watch a register with a HW watchpoint */
5516 /* The expression itself looks suitable for using a hardware
5517 watchpoint, but give the target machine a chance to reject it. */
5518 return found_memory_cnt;
5522 watch_command_wrapper (char *arg, int from_tty)
5524 watch_command (arg, from_tty);
5528 watch_command (char *arg, int from_tty)
5530 watch_command_1 (arg, hw_write, from_tty);
5534 rwatch_command_wrapper (char *arg, int from_tty)
5536 rwatch_command (arg, from_tty);
5540 rwatch_command (char *arg, int from_tty)
5542 watch_command_1 (arg, hw_read, from_tty);
5546 awatch_command_wrapper (char *arg, int from_tty)
5548 awatch_command (arg, from_tty);
5552 awatch_command (char *arg, int from_tty)
5554 watch_command_1 (arg, hw_access, from_tty);
5558 /* Helper routines for the until_command routine in infcmd.c. Here
5559 because it uses the mechanisms of breakpoints. */
5561 /* This function is called by fetch_inferior_event via the
5562 cmd_continuation pointer, to complete the until command. It takes
5563 care of cleaning up the temporary breakpoints set up by the until
5566 until_break_command_continuation (struct continuation_arg *arg)
5568 struct cleanup *cleanups;
5570 cleanups = (struct cleanup *) arg->data.pointer;
5571 do_exec_cleanups (cleanups);
5576 until_break_command (char *arg, int from_tty)
5578 struct symtabs_and_lines sals;
5579 struct symtab_and_line sal;
5580 struct frame_info *prev_frame = get_prev_frame (selected_frame);
5581 struct breakpoint *breakpoint;
5582 struct cleanup *old_chain;
5583 struct continuation_arg *arg1;
5586 clear_proceed_status ();
5588 /* Set a breakpoint where the user wants it and at return from
5591 if (default_breakpoint_valid)
5592 sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
5593 default_breakpoint_line, (char ***) NULL);
5595 sals = decode_line_1 (&arg, 1, (struct symtab *) NULL,
5596 0, (char ***) NULL);
5598 if (sals.nelts != 1)
5599 error ("Couldn't get information on specified line.");
5602 xfree (sals.sals); /* malloc'd, so freed */
5605 error ("Junk at end of arguments.");
5607 resolve_sal_pc (&sal);
5609 breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until);
5611 if (!event_loop_p || !target_can_async_p ())
5612 old_chain = make_cleanup_delete_breakpoint (breakpoint);
5614 old_chain = make_exec_cleanup_delete_breakpoint (breakpoint);
5616 /* If we are running asynchronously, and the target supports async
5617 execution, we are not waiting for the target to stop, in the call
5618 tp proceed, below. This means that we cannot delete the
5619 brekpoints until the target has actually stopped. The only place
5620 where we get a chance to do that is in fetch_inferior_event, so
5621 we must set things up for that. */
5623 if (event_loop_p && target_can_async_p ())
5625 /* In this case the arg for the continuation is just the point
5626 in the exec_cleanups chain from where to start doing
5627 cleanups, because all the continuation does is the cleanups in
5628 the exec_cleanup_chain. */
5630 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
5632 arg1->data.pointer = old_chain;
5634 add_continuation (until_break_command_continuation, arg1);
5637 /* Keep within the current frame */
5641 sal = find_pc_line (prev_frame->pc, 0);
5642 sal.pc = prev_frame->pc;
5643 breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until);
5644 if (!event_loop_p || !target_can_async_p ())
5645 make_cleanup_delete_breakpoint (breakpoint);
5647 make_exec_cleanup_delete_breakpoint (breakpoint);
5650 proceed (-1, TARGET_SIGNAL_DEFAULT, 0);
5651 /* Do the cleanups now, anly if we are not running asynchronously,
5652 of if we are, but the target is still synchronous. */
5653 if (!event_loop_p || !target_can_async_p ())
5654 do_cleanups (old_chain);
5658 /* These aren't used; I don't konw what they were for. */
5659 /* Set a breakpoint at the catch clause for NAME. */
5661 catch_breakpoint (char *name)
5666 disable_catch_breakpoint (void)
5671 delete_catch_breakpoint (void)
5676 enable_catch_breakpoint (void)
5683 struct sal_chain *next;
5684 struct symtab_and_line sal;
5688 /* Not really used -- invocation in handle_gnu_4_16_catch_command
5689 had been commented out in the v.4.16 sources, and stays
5690 disabled there now because "catch NAME" syntax isn't allowed.
5692 /* This isn't used; I don't know what it was for. */
5693 /* For each catch clause identified in ARGS, run FUNCTION
5694 with that clause as an argument. */
5695 static struct symtabs_and_lines
5696 map_catch_names (char *args, int (*function) ())
5698 register char *p = args;
5700 struct symtabs_and_lines sals;
5702 struct sal_chain *sal_chain = 0;
5706 error_no_arg ("one or more catch names");
5714 /* Don't swallow conditional part. */
5715 if (p1[0] == 'i' && p1[1] == 'f'
5716 && (p1[2] == ' ' || p1[2] == '\t'))
5722 while (isalnum (*p1) || *p1 == '_' || *p1 == '$')
5726 if (*p1 && *p1 != ' ' && *p1 != '\t')
5727 error ("Arguments must be catch names.");
5733 struct sal_chain *next = (struct sal_chain *)
5734 alloca (sizeof (struct sal_chain));
5735 next->next = sal_chain;
5736 next->sal = get_catch_sal (p);
5741 printf_unfiltered ("No catch clause for exception %s.\n", p);
5746 while (*p == ' ' || *p == '\t')
5752 /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
5754 static struct symtabs_and_lines
5755 get_catch_sals (int this_level_only)
5757 register struct blockvector *bl;
5758 register struct block *block;
5759 int index, have_default = 0;
5761 struct symtabs_and_lines sals;
5762 struct sal_chain *sal_chain = 0;
5763 char *blocks_searched;
5765 /* Not sure whether an error message is always the correct response,
5766 but it's better than a core dump. */
5767 if (selected_frame == NULL)
5768 error ("No selected frame.");
5769 block = get_frame_block (selected_frame, 0);
5770 pc = selected_frame->pc;
5776 error ("No symbol table info available.\n");
5778 bl = blockvector_for_pc (BLOCK_END (block) - 4, &index);
5779 blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
5780 memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
5784 CORE_ADDR end = BLOCK_END (block) - 4;
5787 if (bl != blockvector_for_pc (end, &index))
5788 error ("blockvector blotch");
5789 if (BLOCKVECTOR_BLOCK (bl, index) != block)
5790 error ("blockvector botch");
5791 last_index = BLOCKVECTOR_NBLOCKS (bl);
5794 /* Don't print out blocks that have gone by. */
5795 while (index < last_index
5796 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc)
5799 while (index < last_index
5800 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end)
5802 if (blocks_searched[index] == 0)
5804 struct block *b = BLOCKVECTOR_BLOCK (bl, index);
5806 register struct symbol *sym;
5808 ALL_BLOCK_SYMBOLS (b, i, sym)
5810 if (STREQ (SYMBOL_NAME (sym), "default"))
5816 if (SYMBOL_CLASS (sym) == LOC_LABEL)
5818 struct sal_chain *next = (struct sal_chain *)
5819 alloca (sizeof (struct sal_chain));
5820 next->next = sal_chain;
5821 next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym),
5826 blocks_searched[index] = 1;
5832 if (sal_chain && this_level_only)
5835 /* After handling the function's top-level block, stop.
5836 Don't continue to its superblock, the block of
5837 per-file symbols. */
5838 if (BLOCK_FUNCTION (block))
5840 block = BLOCK_SUPERBLOCK (block);
5845 struct sal_chain *tmp_chain;
5847 /* Count the number of entries. */
5848 for (index = 0, tmp_chain = sal_chain; tmp_chain;
5849 tmp_chain = tmp_chain->next)
5853 sals.sals = (struct symtab_and_line *)
5854 xmalloc (index * sizeof (struct symtab_and_line));
5855 for (index = 0; sal_chain; sal_chain = sal_chain->next, index++)
5856 sals.sals[index] = sal_chain->sal;
5863 ep_skip_leading_whitespace (char **s)
5865 if ((s == NULL) || (*s == NULL))
5867 while (isspace (**s))
5871 /* This function examines a string, and attempts to find a token
5872 that might be an event name in the leading characters. If a
5873 possible match is found, a pointer to the last character of
5874 the token is returned. Else, NULL is returned. */
5877 ep_find_event_name_end (char *arg)
5880 char *event_name_end = NULL;
5882 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5886 /* We break out of the loop when we find a token delimiter.
5887 Basically, we're looking for alphanumerics and underscores;
5888 anything else delimites the token. */
5891 if (!isalnum (*s) && (*s != '_'))
5897 return event_name_end;
5901 /* This function attempts to parse an optional "if <cond>" clause
5902 from the arg string. If one is not found, it returns NULL.
5904 Else, it returns a pointer to the condition string. (It does not
5905 attempt to evaluate the string against a particular block.) And,
5906 it updates arg to point to the first character following the parsed
5907 if clause in the arg string. */
5910 ep_parse_optional_if_clause (char **arg)
5914 if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2]))
5917 /* Skip the "if" keyword. */
5920 /* Skip any extra leading whitespace, and record the start of the
5921 condition string. */
5922 ep_skip_leading_whitespace (arg);
5925 /* Assume that the condition occupies the remainder of the arg string. */
5926 (*arg) += strlen (cond_string);
5931 /* This function attempts to parse an optional filename from the arg
5932 string. If one is not found, it returns NULL.
5934 Else, it returns a pointer to the parsed filename. (This function
5935 makes no attempt to verify that a file of that name exists, or is
5936 accessible.) And, it updates arg to point to the first character
5937 following the parsed filename in the arg string.
5939 Note that clients needing to preserve the returned filename for
5940 future access should copy it to their own buffers. */
5942 ep_parse_optional_filename (char **arg)
5944 static char filename[1024];
5949 if ((*arg_p == '\0') || isspace (*arg_p))
5967 /* Commands to deal with catching events, such as signals, exceptions,
5968 process start/exit, etc. */
5972 catch_fork, catch_vfork
5976 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
5977 static void catch_fork_command_1 (catch_fork_kind fork_kind,
5978 char *arg, int tempflag, int from_tty);
5981 catch_fork_command_1 (catch_fork_kind fork_kind, char *arg, int tempflag,
5984 char *cond_string = NULL;
5986 ep_skip_leading_whitespace (&arg);
5988 /* The allowed syntax is:
5990 catch [v]fork if <cond>
5992 First, check if there's an if clause. */
5993 cond_string = ep_parse_optional_if_clause (&arg);
5995 if ((*arg != '\0') && !isspace (*arg))
5996 error ("Junk at end of arguments.");
5998 /* If this target supports it, create a fork or vfork catchpoint
5999 and enable reporting of such events. */
6003 create_fork_event_catchpoint (tempflag, cond_string);
6006 create_vfork_event_catchpoint (tempflag, cond_string);
6009 error ("unsupported or unknown fork kind; cannot catch it");
6015 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6017 catch_exec_command_1 (char *arg, int tempflag, int from_tty)
6019 char *cond_string = NULL;
6021 ep_skip_leading_whitespace (&arg);
6023 /* The allowed syntax is:
6025 catch exec if <cond>
6027 First, check if there's an if clause. */
6028 cond_string = ep_parse_optional_if_clause (&arg);
6030 if ((*arg != '\0') && !isspace (*arg))
6031 error ("Junk at end of arguments.");
6033 /* If this target supports it, create an exec catchpoint
6034 and enable reporting of such events. */
6035 create_exec_event_catchpoint (tempflag, cond_string);
6039 #if defined(SOLIB_ADD)
6041 catch_load_command_1 (char *arg, int tempflag, int from_tty)
6043 char *dll_pathname = NULL;
6044 char *cond_string = NULL;
6046 ep_skip_leading_whitespace (&arg);
6048 /* The allowed syntax is:
6050 catch load if <cond>
6051 catch load <filename>
6052 catch load <filename> if <cond>
6054 The user is not allowed to specify the <filename> after an
6057 We'll ignore the pathological case of a file named "if".
6059 First, check if there's an if clause. If so, then there
6060 cannot be a filename. */
6061 cond_string = ep_parse_optional_if_clause (&arg);
6063 /* If there was an if clause, then there cannot be a filename.
6064 Else, there might be a filename and an if clause. */
6065 if (cond_string == NULL)
6067 dll_pathname = ep_parse_optional_filename (&arg);
6068 ep_skip_leading_whitespace (&arg);
6069 cond_string = ep_parse_optional_if_clause (&arg);
6072 if ((*arg != '\0') && !isspace (*arg))
6073 error ("Junk at end of arguments.");
6075 /* Create a load breakpoint that only triggers when a load of
6076 the specified dll (or any dll, if no pathname was specified)
6078 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid), tempflag,
6079 dll_pathname, cond_string);
6083 catch_unload_command_1 (char *arg, int tempflag, int from_tty)
6085 char *dll_pathname = NULL;
6086 char *cond_string = NULL;
6088 ep_skip_leading_whitespace (&arg);
6090 /* The allowed syntax is:
6092 catch unload if <cond>
6093 catch unload <filename>
6094 catch unload <filename> if <cond>
6096 The user is not allowed to specify the <filename> after an
6099 We'll ignore the pathological case of a file named "if".
6101 First, check if there's an if clause. If so, then there
6102 cannot be a filename. */
6103 cond_string = ep_parse_optional_if_clause (&arg);
6105 /* If there was an if clause, then there cannot be a filename.
6106 Else, there might be a filename and an if clause. */
6107 if (cond_string == NULL)
6109 dll_pathname = ep_parse_optional_filename (&arg);
6110 ep_skip_leading_whitespace (&arg);
6111 cond_string = ep_parse_optional_if_clause (&arg);
6114 if ((*arg != '\0') && !isspace (*arg))
6115 error ("Junk at end of arguments.");
6117 /* Create an unload breakpoint that only triggers when an unload of
6118 the specified dll (or any dll, if no pathname was specified)
6120 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid), tempflag,
6121 dll_pathname, cond_string);
6123 #endif /* SOLIB_ADD */
6125 /* Commands to deal with catching exceptions. */
6127 /* Set a breakpoint at the specified callback routine for an
6128 exception event callback */
6131 create_exception_catchpoint (int tempflag, char *cond_string,
6132 enum exception_event_kind ex_event,
6133 struct symtab_and_line *sal)
6135 struct breakpoint *b;
6136 int thread = -1; /* All threads. */
6139 if (!sal) /* no exception support? */
6144 case EX_EVENT_THROW:
6145 bptype = bp_catch_throw;
6147 case EX_EVENT_CATCH:
6148 bptype = bp_catch_catch;
6150 default: /* error condition */
6151 error ("Internal error -- invalid catchpoint kind");
6154 b = set_raw_breakpoint (*sal, bptype);
6155 set_breakpoint_count (breakpoint_count + 1);
6156 b->number = breakpoint_count;
6158 b->cond_string = (cond_string == NULL) ?
6159 NULL : savestring (cond_string, strlen (cond_string));
6161 b->addr_string = NULL;
6162 b->enable_state = bp_enabled;
6163 b->disposition = tempflag ? disp_del : disp_donttouch;
6167 /* Deal with "catch catch" and "catch throw" commands */
6170 catch_exception_command_1 (enum exception_event_kind ex_event, char *arg,
6171 int tempflag, int from_tty)
6173 char *cond_string = NULL;
6174 struct symtab_and_line *sal = NULL;
6176 ep_skip_leading_whitespace (&arg);
6178 cond_string = ep_parse_optional_if_clause (&arg);
6180 if ((*arg != '\0') && !isspace (*arg))
6181 error ("Junk at end of arguments.");
6183 if ((ex_event != EX_EVENT_THROW) &&
6184 (ex_event != EX_EVENT_CATCH))
6185 error ("Unsupported or unknown exception event; cannot catch it");
6187 /* See if we can find a callback routine */
6188 sal = target_enable_exception_callback (ex_event, 1);
6192 /* We have callbacks from the runtime system for exceptions.
6193 Set a breakpoint on the sal found, if no errors */
6194 if (sal != (struct symtab_and_line *) -1)
6195 create_exception_catchpoint (tempflag, cond_string, ex_event, sal);
6197 return; /* something went wrong with setting up callbacks */
6201 /* No callbacks from runtime system for exceptions.
6202 Try GNU C++ exception breakpoints using labels in debug info. */
6203 if (ex_event == EX_EVENT_CATCH)
6205 handle_gnu_4_16_catch_command (arg, tempflag, from_tty);
6207 else if (ex_event == EX_EVENT_THROW)
6209 /* Set a breakpoint on __raise_exception () */
6211 warning ("Unsupported with this platform/compiler combination.");
6212 warning ("Perhaps you can achieve the effect you want by setting");
6213 warning ("a breakpoint on __raise_exception().");
6218 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6219 inside a catch_errors */
6222 cover_target_enable_exception_callback (PTR arg)
6224 args_for_catchpoint_enable *args = arg;
6225 struct symtab_and_line *sal;
6226 sal = target_enable_exception_callback (args->kind, args->enable_p);
6229 else if (sal == (struct symtab_and_line *) -1)
6232 return 1; /*is valid */
6237 /* This is the original v.4.16 and earlier version of the
6238 catch_command_1() function. Now that other flavours of "catch"
6239 have been introduced, and since exception handling can be handled
6240 in other ways (through target ops) also, this is used only for the
6241 GNU C++ exception handling system.
6242 Note: Only the "catch" flavour of GDB 4.16 is handled here. The
6243 "catch NAME" is now no longer allowed in catch_command_1(). Also,
6244 there was no code in GDB 4.16 for "catch throw".
6246 Called from catch_exception_command_1 () */
6250 handle_gnu_4_16_catch_command (char *arg, int tempflag, int from_tty)
6252 /* First, translate ARG into something we can deal with in terms
6255 struct symtabs_and_lines sals;
6256 struct symtab_and_line sal;
6257 register struct expression *cond = 0;
6258 register struct breakpoint *b;
6262 INIT_SAL (&sal); /* initialize to zeroes */
6264 /* If no arg given, or if first arg is 'if ', all active catch clauses
6265 are breakpointed. */
6267 if (!arg || (arg[0] == 'i' && arg[1] == 'f'
6268 && (arg[2] == ' ' || arg[2] == '\t')))
6270 /* Grab all active catch clauses. */
6271 sals = get_catch_sals (0);
6275 /* Grab selected catch clauses. */
6276 error ("catch NAME not implemented");
6279 /* Not sure why this code has been disabled. I'm leaving
6280 it disabled. We can never come here now anyway
6281 since we don't allow the "catch NAME" syntax.
6284 /* This isn't used; I don't know what it was for. */
6285 sals = map_catch_names (arg, catch_breakpoint);
6293 for (i = 0; i < sals.nelts; i++)
6295 resolve_sal_pc (&sals.sals[i]);
6299 if (arg[0] == 'i' && arg[1] == 'f'
6300 && (arg[2] == ' ' || arg[2] == '\t'))
6301 cond = parse_exp_1 ((arg += 2, &arg),
6302 block_for_pc (sals.sals[i].pc), 0);
6304 error ("Junk at end of arguments.");
6309 for (i = 0; i < sals.nelts; i++)
6314 describe_other_breakpoints (sal.pc, sal.section);
6316 /* Important -- this is an ordinary breakpoint. For platforms
6317 with callback support for exceptions,
6318 create_exception_catchpoint() will create special bp types
6319 (bp_catch_catch and bp_catch_throw), and there is code in
6320 insert_breakpoints() and elsewhere that depends on that. */
6321 b = set_raw_breakpoint (sal, bp_breakpoint);
6322 set_breakpoint_count (breakpoint_count + 1);
6323 b->number = breakpoint_count;
6326 b->enable_state = bp_enabled;
6327 b->disposition = tempflag ? disp_del : disp_donttouch;
6334 warning ("Multiple breakpoints were set.");
6335 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
6341 catch_command_1 (char *arg, int tempflag, int from_tty)
6344 /* The first argument may be an event name, such as "start" or "load".
6345 If so, then handle it as such. If it doesn't match an event name,
6346 then attempt to interpret it as an exception name. (This latter is
6347 the v4.16-and-earlier GDB meaning of the "catch" command.)
6349 First, try to find the bounds of what might be an event name. */
6350 char *arg1_start = arg;
6354 if (arg1_start == NULL)
6356 /* Old behaviour was to use pre-v-4.16 syntax */
6357 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6359 /* Now, this is not allowed */
6360 error ("Catch requires an event name.");
6363 arg1_end = ep_find_event_name_end (arg1_start);
6364 if (arg1_end == NULL)
6365 error ("catch requires an event");
6366 arg1_length = arg1_end + 1 - arg1_start;
6368 /* Try to match what we found against known event names. */
6369 if (strncmp (arg1_start, "signal", arg1_length) == 0)
6371 error ("Catch of signal not yet implemented");
6373 else if (strncmp (arg1_start, "catch", arg1_length) == 0)
6375 catch_exception_command_1 (EX_EVENT_CATCH, arg1_end + 1,
6376 tempflag, from_tty);
6378 else if (strncmp (arg1_start, "throw", arg1_length) == 0)
6380 catch_exception_command_1 (EX_EVENT_THROW, arg1_end + 1,
6381 tempflag, from_tty);
6383 else if (strncmp (arg1_start, "thread_start", arg1_length) == 0)
6385 error ("Catch of thread_start not yet implemented");
6387 else if (strncmp (arg1_start, "thread_exit", arg1_length) == 0)
6389 error ("Catch of thread_exit not yet implemented");
6391 else if (strncmp (arg1_start, "thread_join", arg1_length) == 0)
6393 error ("Catch of thread_join not yet implemented");
6395 else if (strncmp (arg1_start, "start", arg1_length) == 0)
6397 error ("Catch of start not yet implemented");
6399 else if (strncmp (arg1_start, "exit", arg1_length) == 0)
6401 error ("Catch of exit not yet implemented");
6403 else if (strncmp (arg1_start, "fork", arg1_length) == 0)
6405 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6406 catch_fork_command_1 (catch_fork, arg1_end + 1, tempflag, from_tty);
6408 error ("Catch of fork not yet implemented");
6411 else if (strncmp (arg1_start, "vfork", arg1_length) == 0)
6413 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6414 catch_fork_command_1 (catch_vfork, arg1_end + 1, tempflag, from_tty);
6416 error ("Catch of vfork not yet implemented");
6419 else if (strncmp (arg1_start, "exec", arg1_length) == 0)
6421 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6422 catch_exec_command_1 (arg1_end + 1, tempflag, from_tty);
6424 error ("Catch of exec not yet implemented");
6427 else if (strncmp (arg1_start, "load", arg1_length) == 0)
6429 #if defined(SOLIB_ADD)
6430 catch_load_command_1 (arg1_end + 1, tempflag, from_tty);
6432 error ("Catch of load not implemented");
6435 else if (strncmp (arg1_start, "unload", arg1_length) == 0)
6437 #if defined(SOLIB_ADD)
6438 catch_unload_command_1 (arg1_end + 1, tempflag, from_tty);
6440 error ("Catch of load not implemented");
6443 else if (strncmp (arg1_start, "stop", arg1_length) == 0)
6445 error ("Catch of stop not yet implemented");
6448 /* This doesn't appear to be an event name */
6452 /* Pre-v.4.16 behaviour was to treat the argument
6453 as the name of an exception */
6454 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6455 /* Now this is not allowed */
6456 error ("Unknown event kind specified for catch");
6461 /* Used by the gui, could be made a worker for other things. */
6464 set_breakpoint_sal (struct symtab_and_line sal)
6466 struct breakpoint *b;
6467 b = set_raw_breakpoint (sal, bp_breakpoint);
6468 set_breakpoint_count (breakpoint_count + 1);
6469 b->number = breakpoint_count;
6476 /* These aren't used; I don't know what they were for. */
6477 /* Disable breakpoints on all catch clauses described in ARGS. */
6479 disable_catch (char *args)
6481 /* Map the disable command to catch clauses described in ARGS. */
6484 /* Enable breakpoints on all catch clauses described in ARGS. */
6486 enable_catch (char *args)
6488 /* Map the disable command to catch clauses described in ARGS. */
6491 /* Delete breakpoints on all catch clauses in the active scope. */
6493 delete_catch (char *args)
6495 /* Map the delete command to catch clauses described in ARGS. */
6500 catch_command (char *arg, int from_tty)
6502 catch_command_1 (arg, 0, from_tty);
6507 tcatch_command (char *arg, int from_tty)
6509 catch_command_1 (arg, 1, from_tty);
6512 /* Delete breakpoints by address or line. */
6515 clear_command (char *arg, int from_tty)
6517 struct breakpoint *b, *tmp, *prev, *found;
6519 struct symtabs_and_lines sals;
6520 struct symtab_and_line sal;
6525 sals = decode_line_spec (arg, 1);
6530 sals.sals = (struct symtab_and_line *)
6531 xmalloc (sizeof (struct symtab_and_line));
6532 make_cleanup (xfree, sals.sals);
6533 INIT_SAL (&sal); /* initialize to zeroes */
6534 sal.line = default_breakpoint_line;
6535 sal.symtab = default_breakpoint_symtab;
6536 sal.pc = default_breakpoint_address;
6537 if (sal.symtab == 0)
6538 error ("No source file specified.");
6546 /* For each line spec given, delete bps which correspond
6547 to it. Do it in two passes, solely to preserve the current
6548 behavior that from_tty is forced true if we delete more than
6552 for (i = 0; i < sals.nelts; i++)
6554 /* If exact pc given, clear bpts at that pc.
6555 If line given (pc == 0), clear all bpts on specified line.
6556 If defaulting, clear all bpts on default line
6559 defaulting sal.pc != 0 tests to do
6564 1 0 <can't happen> */
6569 /* Find all matching breakpoints, remove them from the
6570 breakpoint chain, and add them to the 'found' chain. */
6571 ALL_BREAKPOINTS_SAFE (b, tmp)
6573 /* Are we going to delete b? */
6574 if (b->type != bp_none
6575 && b->type != bp_watchpoint
6576 && b->type != bp_hardware_watchpoint
6577 && b->type != bp_read_watchpoint
6578 && b->type != bp_access_watchpoint
6579 /* Not if b is a watchpoint of any sort... */
6580 && (((sal.pc && (b->address == sal.pc))
6581 && (!section_is_overlay (b->section)
6582 || b->section == sal.section))
6583 /* Yes, if sal.pc matches b (modulo overlays). */
6584 || ((default_match || (0 == sal.pc))
6585 && b->source_file != NULL
6586 && sal.symtab != NULL
6587 && STREQ (b->source_file, sal.symtab->filename)
6588 && b->line_number == sal.line)))
6589 /* Yes, if sal source file and line matches b. */
6591 /* Remove it from breakpoint_chain... */
6592 if (b == breakpoint_chain)
6594 /* b is at the head of the list */
6595 breakpoint_chain = b->next;
6599 prev->next = b->next;
6601 /* And add it to 'found' chain. */
6607 /* Keep b, and keep a pointer to it. */
6612 /* Now go thru the 'found' chain and delete them. */
6616 error ("No breakpoint at %s.", arg);
6618 error ("No breakpoint at this line.");
6622 from_tty = 1; /* Always report if deleted more than one */
6624 printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : "");
6625 breakpoints_changed ();
6629 printf_unfiltered ("%d ", found->number);
6631 delete_breakpoint (found);
6635 putchar_unfiltered ('\n');
6638 /* Delete breakpoint in BS if they are `delete' breakpoints and
6639 all breakpoints that are marked for deletion, whether hit or not.
6640 This is called after any breakpoint is hit, or after errors. */
6643 breakpoint_auto_delete (bpstat bs)
6645 struct breakpoint *b, *temp;
6647 for (; bs; bs = bs->next)
6648 if (bs->breakpoint_at && bs->breakpoint_at->disposition == disp_del
6650 delete_breakpoint (bs->breakpoint_at);
6652 ALL_BREAKPOINTS_SAFE (b, temp)
6654 if (b->disposition == disp_del_at_next_stop)
6655 delete_breakpoint (b);
6659 /* Delete a breakpoint and clean up all traces of it in the data
6663 delete_breakpoint (struct breakpoint *bpt)
6665 register struct breakpoint *b;
6669 error ("Internal error (attempted to delete a NULL breakpoint)");
6672 /* Has this bp already been deleted? This can happen because multiple
6673 lists can hold pointers to bp's. bpstat lists are especial culprits.
6675 One example of this happening is a watchpoint's scope bp. When the
6676 scope bp triggers, we notice that the watchpoint is out of scope, and
6677 delete it. We also delete its scope bp. But the scope bp is marked
6678 "auto-deleting", and is already on a bpstat. That bpstat is then
6679 checked for auto-deleting bp's, which are deleted.
6681 A real solution to this problem might involve reference counts in bp's,
6682 and/or giving them pointers back to their referencing bpstat's, and
6683 teaching delete_breakpoint to only free a bp's storage when no more
6684 references were extent. A cheaper bandaid was chosen. */
6685 if (bpt->type == bp_none)
6688 if (delete_breakpoint_hook)
6689 delete_breakpoint_hook (bpt);
6690 breakpoint_delete_event (bpt->number);
6693 remove_breakpoint (bpt, mark_inserted);
6695 if (breakpoint_chain == bpt)
6696 breakpoint_chain = bpt->next;
6698 /* If we have callback-style exception catchpoints, don't go through
6699 the adjustments to the C++ runtime library etc. if the inferior
6700 isn't actually running. target_enable_exception_callback for a
6701 null target ops vector gives an undesirable error message, so we
6702 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6703 exceptions are supported in this way, it's OK for now. FIXME */
6704 if (ep_is_exception_catchpoint (bpt) && target_has_execution)
6706 static char message1[] = "Error in deleting catchpoint %d:\n";
6707 static char message[sizeof (message1) + 30];
6708 args_for_catchpoint_enable args;
6710 /* Format possible error msg */
6711 sprintf (message, message1, bpt->number);
6712 args.kind = bpt->type == bp_catch_catch ?
6713 EX_EVENT_CATCH : EX_EVENT_THROW;
6715 catch_errors (cover_target_enable_exception_callback, &args,
6716 message, RETURN_MASK_ALL);
6723 b->next = bpt->next;
6727 check_duplicates (bpt);
6728 /* If this breakpoint was inserted, and there is another breakpoint
6729 at the same address, we need to insert the other breakpoint. */
6731 && bpt->type != bp_hardware_watchpoint
6732 && bpt->type != bp_read_watchpoint
6733 && bpt->type != bp_access_watchpoint
6734 && bpt->type != bp_catch_fork
6735 && bpt->type != bp_catch_vfork
6736 && bpt->type != bp_catch_exec)
6739 if (b->address == bpt->address
6740 && b->section == bpt->section
6742 && b->enable_state != bp_disabled
6743 && b->enable_state != bp_shlib_disabled
6744 && b->enable_state != bp_call_disabled)
6748 /* We should never reach this point if there is a permanent
6749 breakpoint at the same address as the one being deleted.
6750 If there is a permanent breakpoint somewhere, it should
6751 always be the only one inserted. */
6752 if (b->enable_state == bp_permanent)
6753 internal_error (__FILE__, __LINE__,
6754 "another breakpoint was inserted on top of "
6755 "a permanent breakpoint");
6757 if (b->type == bp_hardware_breakpoint)
6758 val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
6760 val = target_insert_breakpoint (b->address, b->shadow_contents);
6762 /* If there was an error in the insert, print a message, then stop execution. */
6765 struct ui_file *tmp_error_stream = mem_fileopen ();
6766 make_cleanup_ui_file_delete (tmp_error_stream);
6769 if (b->type == bp_hardware_breakpoint)
6771 fprintf_unfiltered (tmp_error_stream,
6772 "Cannot insert hardware breakpoint %d.\n"
6773 "You may have requested too many hardware breakpoints.\n",
6778 fprintf_unfiltered (tmp_error_stream, "Cannot insert breakpoint %d.\n", b->number);
6779 fprintf_filtered (tmp_error_stream, "Error accessing memory address ");
6780 print_address_numeric (b->address, 1, tmp_error_stream);
6781 fprintf_filtered (tmp_error_stream, ": %s.\n",
6782 safe_strerror (val));
6785 fprintf_unfiltered (tmp_error_stream,"The same program may be running in another process.");
6786 target_terminal_ours_for_output ();
6787 error_stream(tmp_error_stream);
6794 free_command_lines (&bpt->commands);
6797 if (bpt->cond_string != NULL)
6798 xfree (bpt->cond_string);
6799 if (bpt->addr_string != NULL)
6800 xfree (bpt->addr_string);
6801 if (bpt->exp != NULL)
6803 if (bpt->exp_string != NULL)
6804 xfree (bpt->exp_string);
6805 if (bpt->val != NULL)
6806 value_free (bpt->val);
6807 if (bpt->source_file != NULL)
6808 xfree (bpt->source_file);
6809 if (bpt->dll_pathname != NULL)
6810 xfree (bpt->dll_pathname);
6811 if (bpt->triggered_dll_pathname != NULL)
6812 xfree (bpt->triggered_dll_pathname);
6813 if (bpt->exec_pathname != NULL)
6814 xfree (bpt->exec_pathname);
6816 /* Be sure no bpstat's are pointing at it after it's been freed. */
6817 /* FIXME, how can we find all bpstat's?
6818 We just check stop_bpstat for now. */
6819 for (bs = stop_bpstat; bs; bs = bs->next)
6820 if (bs->breakpoint_at == bpt)
6822 bs->breakpoint_at = NULL;
6824 /* bs->commands will be freed later. */
6826 /* On the chance that someone will soon try again to delete this same
6827 bp, we mark it as deleted before freeing its storage. */
6828 bpt->type = bp_none;
6834 do_delete_breakpoint_cleanup (void *b)
6836 delete_breakpoint (b);
6840 make_cleanup_delete_breakpoint (struct breakpoint *b)
6842 return make_cleanup (do_delete_breakpoint_cleanup, b);
6846 make_exec_cleanup_delete_breakpoint (struct breakpoint *b)
6848 return make_exec_cleanup (do_delete_breakpoint_cleanup, b);
6852 delete_command (char *arg, int from_tty)
6854 struct breakpoint *b, *temp;
6860 int breaks_to_delete = 0;
6862 /* Delete all breakpoints if no argument.
6863 Do not delete internal or call-dummy breakpoints, these
6864 have to be deleted with an explicit breakpoint number argument. */
6867 if (b->type != bp_call_dummy &&
6868 b->type != bp_shlib_event &&
6869 b->type != bp_thread_event &&
6870 b->type != bp_overlay_event &&
6872 breaks_to_delete = 1;
6875 /* Ask user only if there are some breakpoints to delete. */
6877 || (breaks_to_delete && query ("Delete all breakpoints? ")))
6879 ALL_BREAKPOINTS_SAFE (b, temp)
6881 if (b->type != bp_call_dummy &&
6882 b->type != bp_shlib_event &&
6883 b->type != bp_thread_event &&
6884 b->type != bp_overlay_event &&
6886 delete_breakpoint (b);
6891 map_breakpoint_numbers (arg, delete_breakpoint);
6894 /* Reset a breakpoint given it's struct breakpoint * BINT.
6895 The value we return ends up being the return value from catch_errors.
6896 Unused in this case. */
6899 breakpoint_re_set_one (PTR bint)
6901 /* get past catch_errs */
6902 struct breakpoint *b = (struct breakpoint *) bint;
6905 struct symtabs_and_lines sals;
6907 enum enable_state save_enable;
6912 warning ("attempted to reset apparently deleted breakpoint #%d?",
6916 case bp_hardware_breakpoint:
6918 case bp_catch_unload:
6919 if (b->addr_string == NULL)
6921 /* Anything without a string can't be re-set. */
6922 delete_breakpoint (b);
6925 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6927 ``And a hack it is, although Apple's Darwin version of GDB
6928 contains an almost identical hack to implement a "future
6929 break" command. It seems to work in many real world cases,
6930 but it is easy to come up with a test case where the patch
6931 doesn't help at all.''
6933 ``It seems that the way GDB implements breakpoints - in -
6934 shared - libraries was designed for a.out shared library
6935 systems (SunOS 4) where shared libraries were loaded at a
6936 fixed address in memory. Since ELF shared libraries can (and
6937 will) be loaded at any address in memory, things break.
6938 Fixing this is not trivial. Therefore, I'm not sure whether
6939 we should add this hack to the branch only. I cannot
6940 guarantee that things will be fixed on the trunk in the near
6943 In case we have a problem, disable this breakpoint. We'll
6944 restore its status if we succeed. Don't disable a
6945 shlib_disabled breakpoint though. There's a fair chance we
6946 can't re-set it if the shared library it's in hasn't been
6948 save_enable = b->enable_state;
6949 if (b->enable_state != bp_shlib_disabled)
6950 b->enable_state = bp_disabled;
6952 set_language (b->language);
6953 input_radix = b->input_radix;
6955 sals = decode_line_1 (&s, 1, (struct symtab *) NULL, 0, (char ***) NULL);
6956 for (i = 0; i < sals.nelts; i++)
6958 resolve_sal_pc (&sals.sals[i]);
6960 /* Reparse conditions, they might contain references to the
6962 if (b->cond_string != NULL)
6967 b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0);
6970 /* We need to re-set the breakpoint if the address changes... */
6971 if (b->address != sals.sals[i].pc
6972 /* ...or new and old breakpoints both have source files, and
6973 the source file name or the line number changes... */
6974 || (b->source_file != NULL
6975 && sals.sals[i].symtab != NULL
6976 && (!STREQ (b->source_file, sals.sals[i].symtab->filename)
6977 || b->line_number != sals.sals[i].line)
6979 /* ...or we switch between having a source file and not having
6981 || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL))
6984 if (b->source_file != NULL)
6985 xfree (b->source_file);
6986 if (sals.sals[i].symtab == NULL)
6987 b->source_file = NULL;
6990 savestring (sals.sals[i].symtab->filename,
6991 strlen (sals.sals[i].symtab->filename));
6992 b->line_number = sals.sals[i].line;
6993 b->address = sals.sals[i].pc;
6995 /* Used to check for duplicates here, but that can
6996 cause trouble, as it doesn't check for disabled
7001 /* Might be better to do this just once per breakpoint_re_set,
7002 rather than once for every breakpoint. */
7003 breakpoints_changed ();
7005 b->section = sals.sals[i].section;
7006 b->enable_state = save_enable; /* Restore it, this worked. */
7009 /* Now that this is re-enabled, check_duplicates
7011 check_duplicates (b);
7018 case bp_hardware_watchpoint:
7019 case bp_read_watchpoint:
7020 case bp_access_watchpoint:
7021 innermost_block = NULL;
7022 /* The issue arises of what context to evaluate this in. The
7023 same one as when it was set, but what does that mean when
7024 symbols have been re-read? We could save the filename and
7025 functionname, but if the context is more local than that, the
7026 best we could do would be something like how many levels deep
7027 and which index at that particular level, but that's going to
7028 be less stable than filenames or function names. */
7030 /* So for now, just use a global context. */
7033 b->exp = parse_expression (b->exp_string);
7034 b->exp_valid_block = innermost_block;
7035 mark = value_mark ();
7037 value_free (b->val);
7038 b->val = evaluate_expression (b->exp);
7039 release_value (b->val);
7040 if (VALUE_LAZY (b->val))
7041 value_fetch_lazy (b->val);
7043 if (b->cond_string != NULL)
7048 b->cond = parse_exp_1 (&s, (struct block *) 0, 0);
7050 if (b->enable_state == bp_enabled)
7052 value_free_to_mark (mark);
7054 case bp_catch_catch:
7055 case bp_catch_throw:
7057 /* We needn't really do anything to reset these, since the mask
7058 that requests them is unaffected by e.g., new libraries being
7061 case bp_catch_vfork:
7066 printf_filtered ("Deleting unknown breakpoint type %d\n", b->type);
7068 /* Delete longjmp and overlay event breakpoints; they will be
7069 reset later by breakpoint_re_set. */
7071 case bp_longjmp_resume:
7072 case bp_overlay_event:
7073 delete_breakpoint (b);
7076 /* This breakpoint is special, it's set up when the inferior
7077 starts and we really don't want to touch it. */
7078 case bp_shlib_event:
7080 /* Like bp_shlib_event, this breakpoint type is special.
7081 Once it is set up, we do not want to touch it. */
7082 case bp_thread_event:
7084 /* Keep temporary breakpoints, which can be encountered when we step
7085 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7086 Otherwise these should have been blown away via the cleanup chain
7087 or by breakpoint_init_inferior when we rerun the executable. */
7090 case bp_watchpoint_scope:
7092 case bp_step_resume:
7099 /* Re-set all breakpoints after symbols have been re-loaded. */
7101 breakpoint_re_set (void)
7103 struct breakpoint *b, *temp;
7104 enum language save_language;
7105 int save_input_radix;
7106 static char message1[] = "Error in re-setting breakpoint %d:\n";
7107 char message[sizeof (message1) + 30 /* slop */ ];
7109 save_language = current_language->la_language;
7110 save_input_radix = input_radix;
7111 ALL_BREAKPOINTS_SAFE (b, temp)
7113 /* Format possible error msg */
7114 sprintf (message, message1, b->number);
7115 catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL);
7117 set_language (save_language);
7118 input_radix = save_input_radix;
7120 if (GET_LONGJMP_TARGET_P ())
7122 create_longjmp_breakpoint ("longjmp");
7123 create_longjmp_breakpoint ("_longjmp");
7124 create_longjmp_breakpoint ("siglongjmp");
7125 create_longjmp_breakpoint ("_siglongjmp");
7126 create_longjmp_breakpoint (NULL);
7129 create_overlay_event_breakpoint ("_ovly_debug_event");
7132 /* Reset the thread number of this breakpoint:
7134 - If the breakpoint is for all threads, leave it as-is.
7135 - Else, reset it to the current thread for inferior_ptid. */
7137 breakpoint_re_set_thread (struct breakpoint *b)
7139 if (b->thread != -1)
7141 if (in_thread_list (inferior_ptid))
7142 b->thread = pid_to_thread_id (inferior_ptid);
7146 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7147 If from_tty is nonzero, it prints a message to that effect,
7148 which ends with a period (no newline). */
7151 set_ignore_count (int bptnum, int count, int from_tty)
7153 register struct breakpoint *b;
7159 if (b->number == bptnum)
7161 b->ignore_count = count;
7165 printf_filtered ("Will stop next time breakpoint %d is reached.",
7167 else if (count == 1)
7168 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7171 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7174 breakpoints_changed ();
7175 breakpoint_modify_event (b->number);
7179 error ("No breakpoint number %d.", bptnum);
7182 /* Clear the ignore counts of all breakpoints. */
7184 breakpoint_clear_ignore_counts (void)
7186 struct breakpoint *b;
7189 b->ignore_count = 0;
7192 /* Command to set ignore-count of breakpoint N to COUNT. */
7195 ignore_command (char *args, int from_tty)
7201 error_no_arg ("a breakpoint number");
7203 num = get_number (&p);
7205 error ("bad breakpoint number: '%s'", args);
7207 error ("Second argument (specified ignore-count) is missing.");
7209 set_ignore_count (num,
7210 longest_to_int (value_as_long (parse_and_eval (p))),
7213 printf_filtered ("\n");
7216 /* Call FUNCTION on each of the breakpoints
7217 whose numbers are given in ARGS. */
7220 map_breakpoint_numbers (char *args, void (*function) (struct breakpoint *))
7222 register char *p = args;
7225 register struct breakpoint *b, *tmp;
7229 error_no_arg ("one or more breakpoint numbers");
7236 num = get_number_or_range (&p1);
7239 warning ("bad breakpoint number at or near '%s'", p);
7243 ALL_BREAKPOINTS_SAFE (b, tmp)
7244 if (b->number == num)
7246 struct breakpoint *related_breakpoint = b->related_breakpoint;
7249 if (related_breakpoint)
7250 function (related_breakpoint);
7254 printf_unfiltered ("No breakpoint number %d.\n", num);
7260 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7261 If from_tty is nonzero, it prints a message to that effect,
7262 which ends with a period (no newline). */
7265 disable_breakpoint (struct breakpoint *bpt)
7267 /* Never disable a watchpoint scope breakpoint; we want to
7268 hit them when we leave scope so we can delete both the
7269 watchpoint and its scope breakpoint at that time. */
7270 if (bpt->type == bp_watchpoint_scope)
7273 /* You can't disable permanent breakpoints. */
7274 if (bpt->enable_state == bp_permanent)
7277 bpt->enable_state = bp_disabled;
7279 check_duplicates (bpt);
7281 if (modify_breakpoint_hook)
7282 modify_breakpoint_hook (bpt);
7283 breakpoint_modify_event (bpt->number);
7288 disable_command (char *args, int from_tty)
7290 register struct breakpoint *bpt;
7292 ALL_BREAKPOINTS (bpt)
7296 warning ("attempted to disable apparently deleted breakpoint #%d?",
7301 case bp_catch_unload:
7303 case bp_catch_vfork:
7305 case bp_catch_catch:
7306 case bp_catch_throw:
7307 case bp_hardware_breakpoint:
7309 case bp_hardware_watchpoint:
7310 case bp_read_watchpoint:
7311 case bp_access_watchpoint:
7312 disable_breakpoint (bpt);
7317 map_breakpoint_numbers (args, disable_breakpoint);
7321 do_enable_breakpoint (struct breakpoint *bpt, enum bpdisp disposition)
7323 struct frame_info *save_selected_frame = NULL;
7324 int save_selected_frame_level = -1;
7325 int target_resources_ok, other_type_used;
7328 if (bpt->type == bp_hardware_breakpoint)
7331 i = hw_breakpoint_used_count ();
7332 target_resources_ok =
7333 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,
7335 if (target_resources_ok == 0)
7336 error ("No hardware breakpoint support in the target.");
7337 else if (target_resources_ok < 0)
7338 error ("Hardware breakpoints used exceeds limit.");
7341 if (bpt->enable_state != bp_permanent)
7342 bpt->enable_state = bp_enabled;
7343 bpt->disposition = disposition;
7344 check_duplicates (bpt);
7345 breakpoints_changed ();
7347 if (bpt->type == bp_watchpoint ||
7348 bpt->type == bp_hardware_watchpoint ||
7349 bpt->type == bp_read_watchpoint ||
7350 bpt->type == bp_access_watchpoint)
7352 if (bpt->exp_valid_block != NULL)
7354 struct frame_info *fr =
7355 fr = frame_find_by_id (bpt->watchpoint_frame);
7359 Cannot enable watchpoint %d because the block in which its expression\n\
7360 is valid is not currently in scope.\n", bpt->number);
7361 bpt->enable_state = bp_disabled;
7365 save_selected_frame = selected_frame;
7366 save_selected_frame_level = frame_relative_level (selected_frame);
7370 value_free (bpt->val);
7371 mark = value_mark ();
7372 bpt->val = evaluate_expression (bpt->exp);
7373 release_value (bpt->val);
7374 if (VALUE_LAZY (bpt->val))
7375 value_fetch_lazy (bpt->val);
7377 if (bpt->type == bp_hardware_watchpoint ||
7378 bpt->type == bp_read_watchpoint ||
7379 bpt->type == bp_access_watchpoint)
7381 int i = hw_watchpoint_used_count (bpt->type, &other_type_used);
7382 int mem_cnt = can_use_hardware_watchpoint (bpt->val);
7384 /* Hack around 'unused var' error for some targets here */
7386 target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7387 bpt->type, i + mem_cnt, other_type_used);
7388 /* we can consider of type is bp_hardware_watchpoint, convert to
7389 bp_watchpoint in the following condition */
7390 if (target_resources_ok < 0)
7393 Cannot enable watchpoint %d because target watch resources\n\
7394 have been allocated for other watchpoints.\n", bpt->number);
7395 bpt->enable_state = bp_disabled;
7396 value_free_to_mark (mark);
7401 if (save_selected_frame_level >= 0)
7402 select_frame (save_selected_frame);
7403 value_free_to_mark (mark);
7405 if (modify_breakpoint_hook)
7406 modify_breakpoint_hook (bpt);
7407 breakpoint_modify_event (bpt->number);
7411 enable_breakpoint (struct breakpoint *bpt)
7413 do_enable_breakpoint (bpt, bpt->disposition);
7416 /* The enable command enables the specified breakpoints (or all defined
7417 breakpoints) so they once again become (or continue to be) effective
7418 in stopping the inferior. */
7422 enable_command (char *args, int from_tty)
7424 register struct breakpoint *bpt;
7426 ALL_BREAKPOINTS (bpt)
7430 warning ("attempted to enable apparently deleted breakpoint #%d?",
7435 case bp_catch_unload:
7437 case bp_catch_vfork:
7439 case bp_catch_catch:
7440 case bp_catch_throw:
7441 case bp_hardware_breakpoint:
7443 case bp_hardware_watchpoint:
7444 case bp_read_watchpoint:
7445 case bp_access_watchpoint:
7446 enable_breakpoint (bpt);
7451 map_breakpoint_numbers (args, enable_breakpoint);
7455 enable_once_breakpoint (struct breakpoint *bpt)
7457 do_enable_breakpoint (bpt, disp_disable);
7462 enable_once_command (char *args, int from_tty)
7464 map_breakpoint_numbers (args, enable_once_breakpoint);
7468 enable_delete_breakpoint (struct breakpoint *bpt)
7470 do_enable_breakpoint (bpt, disp_del);
7475 enable_delete_command (char *args, int from_tty)
7477 map_breakpoint_numbers (args, enable_delete_breakpoint);
7480 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7482 struct symtabs_and_lines
7483 decode_line_spec_1 (char *string, int funfirstline)
7485 struct symtabs_and_lines sals;
7487 error ("Empty line specification.");
7488 if (default_breakpoint_valid)
7489 sals = decode_line_1 (&string, funfirstline,
7490 default_breakpoint_symtab,
7491 default_breakpoint_line,
7494 sals = decode_line_1 (&string, funfirstline,
7495 (struct symtab *) NULL, 0, (char ***) NULL);
7497 error ("Junk at end of line specification: %s", string);
7502 _initialize_breakpoint (void)
7504 struct cmd_list_element *c;
7506 breakpoint_chain = 0;
7507 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7508 before a breakpoint is set. */
7509 breakpoint_count = 0;
7511 add_com ("ignore", class_breakpoint, ignore_command,
7512 "Set ignore-count of breakpoint number N to COUNT.\n\
7513 Usage is `ignore N COUNT'.");
7515 add_com_alias ("bc", "ignore", class_breakpoint, 1);
7517 add_com ("commands", class_breakpoint, commands_command,
7518 "Set commands to be executed when a breakpoint is hit.\n\
7519 Give breakpoint number as argument after \"commands\".\n\
7520 With no argument, the targeted breakpoint is the last one set.\n\
7521 The commands themselves follow starting on the next line.\n\
7522 Type a line containing \"end\" to indicate the end of them.\n\
7523 Give \"silent\" as the first line to make the breakpoint silent;\n\
7524 then no output is printed when it is hit, except what the commands print.");
7526 add_com ("condition", class_breakpoint, condition_command,
7527 "Specify breakpoint number N to break only if COND is true.\n\
7528 Usage is `condition N COND', where N is an integer and COND is an\n\
7529 expression to be evaluated whenever breakpoint N is reached.");
7531 c = add_com ("tbreak", class_breakpoint, tbreak_command,
7532 "Set a temporary breakpoint. Args like \"break\" command.\n\
7533 Like \"break\" except the breakpoint is only temporary,\n\
7534 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7535 by using \"enable delete\" on the breakpoint number.");
7536 set_cmd_completer (c, location_completer);
7538 c = add_com ("hbreak", class_breakpoint, hbreak_command,
7539 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7540 Like \"break\" except the breakpoint requires hardware support,\n\
7541 some target hardware may not have this support.");
7542 set_cmd_completer (c, location_completer);
7544 c = add_com ("thbreak", class_breakpoint, thbreak_command,
7545 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7546 Like \"hbreak\" except the breakpoint is only temporary,\n\
7547 so it will be deleted when hit.");
7548 set_cmd_completer (c, location_completer);
7550 add_prefix_cmd ("enable", class_breakpoint, enable_command,
7551 "Enable some breakpoints.\n\
7552 Give breakpoint numbers (separated by spaces) as arguments.\n\
7553 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7554 This is used to cancel the effect of the \"disable\" command.\n\
7555 With a subcommand you can enable temporarily.",
7556 &enablelist, "enable ", 1, &cmdlist);
7558 add_com ("ab", class_breakpoint, enable_command,
7559 "Enable some breakpoints.\n\
7560 Give breakpoint numbers (separated by spaces) as arguments.\n\
7561 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7562 This is used to cancel the effect of the \"disable\" command.\n\
7563 With a subcommand you can enable temporarily.");
7565 add_com_alias ("en", "enable", class_breakpoint, 1);
7567 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command,
7568 "Enable some breakpoints.\n\
7569 Give breakpoint numbers (separated by spaces) as arguments.\n\
7570 This is used to cancel the effect of the \"disable\" command.\n\
7571 May be abbreviated to simply \"enable\".\n",
7572 &enablebreaklist, "enable breakpoints ", 1, &enablelist);
7574 add_cmd ("once", no_class, enable_once_command,
7575 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7576 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7579 add_cmd ("delete", no_class, enable_delete_command,
7580 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7581 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7584 add_cmd ("delete", no_class, enable_delete_command,
7585 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7586 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7589 add_cmd ("once", no_class, enable_once_command,
7590 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7591 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7594 add_prefix_cmd ("disable", class_breakpoint, disable_command,
7595 "Disable some breakpoints.\n\
7596 Arguments are breakpoint numbers with spaces in between.\n\
7597 To disable all breakpoints, give no argument.\n\
7598 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7599 &disablelist, "disable ", 1, &cmdlist);
7600 add_com_alias ("dis", "disable", class_breakpoint, 1);
7601 add_com_alias ("disa", "disable", class_breakpoint, 1);
7603 add_com ("sb", class_breakpoint, disable_command,
7604 "Disable some breakpoints.\n\
7605 Arguments are breakpoint numbers with spaces in between.\n\
7606 To disable all breakpoints, give no argument.\n\
7607 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7609 add_cmd ("breakpoints", class_alias, disable_command,
7610 "Disable some breakpoints.\n\
7611 Arguments are breakpoint numbers with spaces in between.\n\
7612 To disable all breakpoints, give no argument.\n\
7613 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7614 This command may be abbreviated \"disable\".",
7617 add_prefix_cmd ("delete", class_breakpoint, delete_command,
7618 "Delete some breakpoints or auto-display expressions.\n\
7619 Arguments are breakpoint numbers with spaces in between.\n\
7620 To delete all breakpoints, give no argument.\n\
7622 Also a prefix command for deletion of other GDB objects.\n\
7623 The \"unset\" command is also an alias for \"delete\".",
7624 &deletelist, "delete ", 1, &cmdlist);
7625 add_com_alias ("d", "delete", class_breakpoint, 1);
7627 add_com ("db", class_breakpoint, delete_command,
7628 "Delete some breakpoints.\n\
7629 Arguments are breakpoint numbers with spaces in between.\n\
7630 To delete all breakpoints, give no argument.\n");
7632 add_cmd ("breakpoints", class_alias, delete_command,
7633 "Delete some breakpoints or auto-display expressions.\n\
7634 Arguments are breakpoint numbers with spaces in between.\n\
7635 To delete all breakpoints, give no argument.\n\
7636 This command may be abbreviated \"delete\".",
7639 add_com ("clear", class_breakpoint, clear_command,
7640 concat ("Clear breakpoint at specified line or function.\n\
7641 Argument may be line number, function name, or \"*\" and an address.\n\
7642 If line number is specified, all breakpoints in that line are cleared.\n\
7643 If function is specified, breakpoints at beginning of function are cleared.\n\
7644 If an address is specified, breakpoints at that address are cleared.\n\n",
7645 "With no argument, clears all breakpoints in the line that the selected frame\n\
7648 See also the \"delete\" command which clears breakpoints by number.", NULL));
7650 c = add_com ("break", class_breakpoint, break_command,
7651 concat ("Set breakpoint at specified line or function.\n\
7652 Argument may be line number, function name, or \"*\" and an address.\n\
7653 If line number is specified, break at start of code for that line.\n\
7654 If function is specified, break at start of code for that function.\n\
7655 If an address is specified, break at that exact address.\n",
7656 "With no arg, uses current execution address of selected stack frame.\n\
7657 This is useful for breaking on return to a stack frame.\n\
7659 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7661 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL));
7662 set_cmd_completer (c, location_completer);
7664 add_com_alias ("b", "break", class_run, 1);
7665 add_com_alias ("br", "break", class_run, 1);
7666 add_com_alias ("bre", "break", class_run, 1);
7667 add_com_alias ("brea", "break", class_run, 1);
7671 add_com_alias ("ba", "break", class_breakpoint, 1);
7672 add_com_alias ("bu", "ubreak", class_breakpoint, 1);
7677 add_abbrev_prefix_cmd ("stop", class_breakpoint, stop_command,
7678 "Break in function/address or break at a line in the current file.",
7679 &stoplist, "stop ", 1, &cmdlist);
7680 add_cmd ("in", class_breakpoint, stopin_command,
7681 "Break in function or address.\n", &stoplist);
7682 add_cmd ("at", class_breakpoint, stopat_command,
7683 "Break at a line in the current file.\n", &stoplist);
7684 add_com ("status", class_info, breakpoints_info,
7685 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7686 The \"Type\" column indicates one of:\n\
7687 \tbreakpoint - normal breakpoint\n\
7688 \twatchpoint - watchpoint\n\
7689 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7690 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7691 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7692 address and file/line number respectively.\n\n",
7693 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7694 are set to the address of the last breakpoint listed.\n\n\
7695 Convenience variable \"$bpnum\" contains the number of the last\n\
7696 breakpoint set.", NULL));
7699 add_info ("breakpoints", breakpoints_info,
7700 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7701 The \"Type\" column indicates one of:\n\
7702 \tbreakpoint - normal breakpoint\n\
7703 \twatchpoint - watchpoint\n\
7704 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7705 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7706 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7707 address and file/line number respectively.\n\n",
7708 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7709 are set to the address of the last breakpoint listed.\n\n\
7710 Convenience variable \"$bpnum\" contains the number of the last\n\
7711 breakpoint set.", NULL));
7714 add_com ("lb", class_breakpoint, breakpoints_info,
7715 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7716 The \"Type\" column indicates one of:\n\
7717 \tbreakpoint - normal breakpoint\n\
7718 \twatchpoint - watchpoint\n\
7719 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7720 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7721 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7722 address and file/line number respectively.\n\n",
7723 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7724 are set to the address of the last breakpoint listed.\n\n\
7725 Convenience variable \"$bpnum\" contains the number of the last\n\
7726 breakpoint set.", NULL));
7728 add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints,
7729 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7730 The \"Type\" column indicates one of:\n\
7731 \tbreakpoint - normal breakpoint\n\
7732 \twatchpoint - watchpoint\n\
7733 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7734 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7735 \tuntil - internal breakpoint used by the \"until\" command\n\
7736 \tfinish - internal breakpoint used by the \"finish\" command\n",
7737 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7738 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7739 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7740 address and file/line number respectively.\n\n",
7741 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7742 are set to the address of the last breakpoint listed.\n\n\
7743 Convenience variable \"$bpnum\" contains the number of the last\n\
7744 breakpoint set.", NULL),
7745 &maintenanceinfolist);
7747 add_com ("catch", class_breakpoint, catch_command,
7748 "Set catchpoints to catch events.\n\
7749 Raised signals may be caught:\n\
7750 \tcatch signal - all signals\n\
7751 \tcatch signal <signame> - a particular signal\n\
7752 Raised exceptions may be caught:\n\
7753 \tcatch throw - all exceptions, when thrown\n\
7754 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7755 \tcatch catch - all exceptions, when caught\n\
7756 \tcatch catch <exceptname> - a particular exception, when caught\n\
7757 Thread or process events may be caught:\n\
7758 \tcatch thread_start - any threads, just after creation\n\
7759 \tcatch thread_exit - any threads, just before expiration\n\
7760 \tcatch thread_join - any threads, just after joins\n\
7761 Process events may be caught:\n\
7762 \tcatch start - any processes, just after creation\n\
7763 \tcatch exit - any processes, just before expiration\n\
7764 \tcatch fork - calls to fork()\n\
7765 \tcatch vfork - calls to vfork()\n\
7766 \tcatch exec - calls to exec()\n\
7767 Dynamically-linked library events may be caught:\n\
7768 \tcatch load - loads of any library\n\
7769 \tcatch load <libname> - loads of a particular library\n\
7770 \tcatch unload - unloads of any library\n\
7771 \tcatch unload <libname> - unloads of a particular library\n\
7772 The act of your program's execution stopping may also be caught:\n\
7774 C++ exceptions may be caught:\n\
7775 \tcatch throw - all exceptions, when thrown\n\
7776 \tcatch catch - all exceptions, when caught\n\
7778 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7779 after a fork or vfork is caught.\n\n\
7780 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7782 add_com ("tcatch", class_breakpoint, tcatch_command,
7783 "Set temporary catchpoints to catch events.\n\
7784 Args like \"catch\" command.\n\
7785 Like \"catch\" except the catchpoint is only temporary,\n\
7786 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7787 by using \"enable delete\" on the catchpoint number.");
7789 c = add_com ("watch", class_breakpoint, watch_command,
7790 "Set a watchpoint for an expression.\n\
7791 A watchpoint stops execution of your program whenever the value of\n\
7792 an expression changes.");
7793 set_cmd_completer (c, location_completer);
7795 c = add_com ("rwatch", class_breakpoint, rwatch_command,
7796 "Set a read watchpoint for an expression.\n\
7797 A watchpoint stops execution of your program whenever the value of\n\
7798 an expression is read.");
7799 set_cmd_completer (c, location_completer);
7801 c = add_com ("awatch", class_breakpoint, awatch_command,
7802 "Set a watchpoint for an expression.\n\
7803 A watchpoint stops execution of your program whenever the value of\n\
7804 an expression is either read or written.");
7805 set_cmd_completer (c, location_completer);
7807 add_info ("watchpoints", breakpoints_info,
7808 "Synonym for ``info breakpoints''.");
7811 c = add_set_cmd ("can-use-hw-watchpoints", class_support, var_zinteger,
7812 (char *) &can_use_hw_watchpoints,
7813 "Set debugger's willingness to use watchpoint hardware.\n\
7814 If zero, gdb will not use hardware for new watchpoints, even if\n\
7815 such is available. (However, any hardware watchpoints that were\n\
7816 created before setting this to nonzero, will continue to use watchpoint\n\
7819 add_show_from_set (c, &showlist);
7821 can_use_hw_watchpoints = 1;