1 /* Everything about breakpoints, for GDB.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
28 #include "breakpoint.h"
30 #include "expression.h"
36 #include "gdbthread.h"
39 #include "gdb_string.h"
46 #include "completer.h"
49 #include "cli/cli-script.h"
50 #include "gdb_assert.h"
53 #include "gdb-events.h"
55 /* Prototypes for local functions. */
57 static void until_break_command_continuation (struct continuation_arg *arg);
59 static void catch_command_1 (char *, int, int);
61 static void enable_delete_command (char *, int);
63 static void enable_delete_breakpoint (struct breakpoint *);
65 static void enable_once_command (char *, int);
67 static void enable_once_breakpoint (struct breakpoint *);
69 static void disable_command (char *, int);
71 static void enable_command (char *, int);
73 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint *));
75 static void ignore_command (char *, int);
77 static int breakpoint_re_set_one (void *);
79 static void clear_command (char *, int);
81 static void catch_command (char *, int);
83 static void watch_command (char *, int);
85 static int can_use_hardware_watchpoint (struct value *);
87 extern void break_at_finish_command (char *, int);
88 extern void break_at_finish_at_depth_command (char *, int);
90 extern void tbreak_at_finish_command (char *, int);
92 static void break_command_1 (char *, int, int);
94 static void mention (struct breakpoint *);
96 struct breakpoint *set_raw_breakpoint (struct symtab_and_line, enum bptype);
98 static void check_duplicates (struct breakpoint *);
100 static void breakpoint_adjustment_warning (CORE_ADDR, CORE_ADDR, int, int);
102 static CORE_ADDR adjust_breakpoint_address (CORE_ADDR bpaddr);
104 static void describe_other_breakpoints (CORE_ADDR, asection *);
106 static void breakpoints_info (char *, int);
108 static void breakpoint_1 (int, int);
110 static bpstat bpstat_alloc (struct breakpoint *, bpstat);
112 static int breakpoint_cond_eval (void *);
114 static void cleanup_executing_breakpoints (void *);
116 static void commands_command (char *, int);
118 static void condition_command (char *, int);
120 static int get_number_trailer (char **, int);
122 void set_breakpoint_count (int);
131 static int remove_breakpoint (struct breakpoint *, insertion_state_t);
133 static enum print_stop_action print_it_typical (bpstat);
135 static enum print_stop_action print_bp_stop_message (bpstat bs);
139 enum exception_event_kind kind;
142 args_for_catchpoint_enable;
144 static int watchpoint_check (void *);
146 static int cover_target_enable_exception_callback (void *);
148 static void maintenance_info_breakpoints (char *, int);
150 static void create_longjmp_breakpoint (char *);
152 static void create_overlay_event_breakpoint (char *);
154 static int hw_breakpoint_used_count (void);
156 static int hw_watchpoint_used_count (enum bptype, int *);
158 static void hbreak_command (char *, int);
160 static void thbreak_command (char *, int);
162 static void watch_command_1 (char *, int, int);
164 static void rwatch_command (char *, int);
166 static void awatch_command (char *, int);
168 static void do_enable_breakpoint (struct breakpoint *, enum bpdisp);
170 static void solib_load_unload_1 (char *hookname,
173 char *cond_string, enum bptype bp_kind);
175 static void create_fork_vfork_event_catchpoint (int tempflag,
177 enum bptype bp_kind);
179 static void break_at_finish_at_depth_command_1 (char *arg,
180 int flag, int from_tty);
182 static void break_at_finish_command_1 (char *arg, int flag, int from_tty);
184 static void stop_command (char *arg, int from_tty);
186 static void stopin_command (char *arg, int from_tty);
188 static void stopat_command (char *arg, int from_tty);
190 static char *ep_find_event_name_end (char *arg);
192 static char *ep_parse_optional_if_clause (char **arg);
194 static char *ep_parse_optional_filename (char **arg);
196 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
197 static void catch_exec_command_1 (char *arg, int tempflag, int from_tty);
200 static void create_exception_catchpoint (int tempflag, char *cond_string,
201 enum exception_event_kind ex_event,
202 struct symtab_and_line *sal);
204 static void catch_exception_command_1 (enum exception_event_kind ex_event,
205 char *arg, int tempflag, int from_tty);
207 static void tcatch_command (char *arg, int from_tty);
209 static void ep_skip_leading_whitespace (char **s);
211 /* Prototypes for exported functions. */
213 /* If FALSE, gdb will not use hardware support for watchpoints, even
214 if such is available. */
215 static int can_use_hw_watchpoints;
217 void _initialize_breakpoint (void);
219 extern int addressprint; /* Print machine addresses? */
221 /* Are we executing breakpoint commands? */
222 static int executing_breakpoint_commands;
224 /* Are overlay event breakpoints enabled? */
225 static int overlay_events_enabled;
227 /* Walk the following statement or block through all breakpoints.
228 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
231 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
233 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
234 for (B = breakpoint_chain; \
235 B ? (TMP=B->next, 1): 0; \
238 /* Similar iterators for the low-level breakpoints. */
240 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->next)
242 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
243 for (B = bp_location_chain; \
244 B ? (TMP=B->next, 1): 0; \
247 /* True if SHIFT_INST_REGS defined, false otherwise. */
249 int must_shift_inst_regs =
250 #if defined(SHIFT_INST_REGS)
257 /* True if breakpoint hit counts should be displayed in breakpoint info. */
259 int show_breakpoint_hit_counts = 1;
261 /* Chains of all breakpoints defined. */
263 struct breakpoint *breakpoint_chain;
265 struct bp_location *bp_location_chain;
267 /* Number of last breakpoint made. */
269 int breakpoint_count;
271 /* Pointer to current exception event record */
272 static struct exception_event_record *current_exception_event;
274 /* Indicator of whether exception catchpoints should be nuked
275 between runs of a program */
276 int exception_catchpoints_are_fragile = 0;
278 /* Indicator of when exception catchpoints set-up should be
279 reinitialized -- e.g. when program is re-run */
280 int exception_support_initialized = 0;
282 /* This function returns a pointer to the string representation of the
283 pathname of the dynamically-linked library that has just been
286 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
287 or undefined results are guaranteed.
289 This string's contents are only valid immediately after the
290 inferior has stopped in the dynamic linker hook, and becomes
291 invalid as soon as the inferior is continued. Clients should make
292 a copy of this string if they wish to continue the inferior and
293 then access the string. */
295 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
296 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
299 /* This function returns a pointer to the string representation of the
300 pathname of the dynamically-linked library that has just been
303 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
304 TRUE, or undefined results are guaranteed.
306 This string's contents are only valid immediately after the
307 inferior has stopped in the dynamic linker hook, and becomes
308 invalid as soon as the inferior is continued. Clients should make
309 a copy of this string if they wish to continue the inferior and
310 then access the string. */
312 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
313 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
316 /* This function is called by the "catch load" command. It allows the
317 debugger to be notified by the dynamic linker when a specified
318 library file (or any library file, if filename is NULL) is loaded. */
320 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
321 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
322 error ("catch of library loads not yet implemented on this platform")
325 /* This function is called by the "catch unload" command. It allows
326 the debugger to be notified by the dynamic linker when a specified
327 library file (or any library file, if filename is NULL) is
330 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
331 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
332 error ("catch of library unloads not yet implemented on this platform")
335 /* Set breakpoint count to NUM. */
338 set_breakpoint_count (int num)
340 breakpoint_count = num;
341 set_internalvar (lookup_internalvar ("bpnum"),
342 value_from_longest (builtin_type_int, (LONGEST) num));
345 /* Used in run_command to zero the hit count when a new run starts. */
348 clear_breakpoint_hit_counts (void)
350 struct breakpoint *b;
356 /* Default address, symtab and line to put a breakpoint at
357 for "break" command with no arg.
358 if default_breakpoint_valid is zero, the other three are
359 not valid, and "break" with no arg is an error.
361 This set by print_stack_frame, which calls set_default_breakpoint. */
363 int default_breakpoint_valid;
364 CORE_ADDR default_breakpoint_address;
365 struct symtab *default_breakpoint_symtab;
366 int default_breakpoint_line;
368 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
369 Advance *PP after the string and any trailing whitespace.
371 Currently the string can either be a number or "$" followed by the name
372 of a convenience variable. Making it an expression wouldn't work well
373 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
375 TRAILER is a character which can be found after the number; most
376 commonly this is `-'. If you don't want a trailer, use \0. */
378 get_number_trailer (char **pp, int trailer)
380 int retval = 0; /* default */
384 /* Empty line means refer to the last breakpoint. */
385 return breakpoint_count;
388 /* Make a copy of the name, so we can null-terminate it
389 to pass to lookup_internalvar(). */
394 while (isalnum (*p) || *p == '_')
396 varname = (char *) alloca (p - start + 1);
397 strncpy (varname, start, p - start);
398 varname[p - start] = '\0';
399 val = value_of_internalvar (lookup_internalvar (varname));
400 if (TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_INT)
401 retval = (int) value_as_long (val);
404 printf_filtered ("Convenience variable must have integer value.\n");
412 while (*p >= '0' && *p <= '9')
415 /* There is no number here. (e.g. "cond a == b"). */
417 /* Skip non-numeric token */
418 while (*p && !isspace((int) *p))
420 /* Return zero, which caller must interpret as error. */
426 if (!(isspace (*p) || *p == '\0' || *p == trailer))
428 /* Trailing junk: return 0 and let caller print error msg. */
429 while (!(isspace (*p) || *p == '\0' || *p == trailer))
440 /* Like get_number_trailer, but don't allow a trailer. */
442 get_number (char **pp)
444 return get_number_trailer (pp, '\0');
447 /* Parse a number or a range.
448 * A number will be of the form handled by get_number.
449 * A range will be of the form <number1> - <number2>, and
450 * will represent all the integers between number1 and number2,
453 * While processing a range, this fuction is called iteratively;
454 * At each call it will return the next value in the range.
456 * At the beginning of parsing a range, the char pointer PP will
457 * be advanced past <number1> and left pointing at the '-' token.
458 * Subsequent calls will not advance the pointer until the range
459 * is completed. The call that completes the range will advance
460 * pointer PP past <number2>.
464 get_number_or_range (char **pp)
466 static int last_retval, end_value;
467 static char *end_ptr;
468 static int in_range = 0;
472 /* Default case: pp is pointing either to a solo number,
473 or to the first number of a range. */
474 last_retval = get_number_trailer (pp, '-');
479 /* This is the start of a range (<number1> - <number2>).
480 Skip the '-', parse and remember the second number,
481 and also remember the end of the final token. */
485 while (isspace ((int) *end_ptr))
486 end_ptr++; /* skip white space */
487 end_value = get_number (temp);
488 if (end_value < last_retval)
490 error ("inverted range");
492 else if (end_value == last_retval)
494 /* degenerate range (number1 == number2). Advance the
495 token pointer so that the range will be treated as a
504 error ("negative value");
507 /* pp points to the '-' that betokens a range. All
508 number-parsing has already been done. Return the next
509 integer value (one greater than the saved previous value).
510 Do not advance the token pointer 'pp' until the end of range
513 if (++last_retval == end_value)
515 /* End of range reached; advance token pointer. */
525 /* condition N EXP -- set break condition of breakpoint N to EXP. */
528 condition_command (char *arg, int from_tty)
530 struct breakpoint *b;
535 error_no_arg ("breakpoint number");
538 bnum = get_number (&p);
540 error ("Bad breakpoint argument: '%s'", arg);
543 if (b->number == bnum)
550 if (b->cond_string != NULL)
551 xfree (b->cond_string);
556 b->cond_string = NULL;
558 printf_filtered ("Breakpoint %d now unconditional.\n", bnum);
563 /* I don't know if it matters whether this is the string the user
564 typed in or the decompiled expression. */
565 b->cond_string = savestring (arg, strlen (arg));
566 b->cond = parse_exp_1 (&arg, block_for_pc (b->loc->address), 0);
568 error ("Junk at end of expression");
570 breakpoints_changed ();
571 breakpoint_modify_event (b->number);
575 error ("No breakpoint number %d.", bnum);
579 commands_command (char *arg, int from_tty)
581 struct breakpoint *b;
584 struct command_line *l;
586 /* If we allowed this, we would have problems with when to
587 free the storage, if we change the commands currently
590 if (executing_breakpoint_commands)
591 error ("Can't use the \"commands\" command among a breakpoint's commands.");
594 bnum = get_number (&p);
597 error ("Unexpected extra arguments following breakpoint number.");
600 if (b->number == bnum)
602 char *tmpbuf = xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
604 struct cleanup *cleanups = make_cleanup (xfree, tmpbuf);
605 l = read_command_lines (tmpbuf, from_tty);
606 do_cleanups (cleanups);
607 free_command_lines (&b->commands);
609 breakpoints_changed ();
610 breakpoint_modify_event (b->number);
613 error ("No breakpoint number %d.", bnum);
616 /* Like target_read_memory() but if breakpoints are inserted, return
617 the shadow contents instead of the breakpoints themselves.
619 Read "memory data" from whatever target or inferior we have.
620 Returns zero if successful, errno value if not. EIO is used
621 for address out of bounds. If breakpoints are inserted, returns
622 shadow contents, not the breakpoints themselves. From breakpoint.c. */
625 read_memory_nobpt (CORE_ADDR memaddr, char *myaddr, unsigned len)
628 struct bp_location *b;
629 CORE_ADDR bp_addr = 0;
632 if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
633 /* No breakpoints on this machine. */
634 return target_read_memory (memaddr, myaddr, len);
638 if (b->owner->type == bp_none)
639 warning ("reading through apparently deleted breakpoint #%d?",
642 if (b->loc_type != bp_loc_software_breakpoint)
646 /* Addresses and length of the part of the breakpoint that
648 /* XXXX The m68k, sh and h8300 have different local and remote
649 breakpoint values. BREAKPOINT_FROM_PC still manages to
650 correctly determine the breakpoints memory address and size
651 for these targets. */
652 bp_addr = b->address;
654 if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
659 if (bp_addr + bp_size <= memaddr)
660 /* The breakpoint is entirely before the chunk of memory we
663 if (bp_addr >= memaddr + len)
664 /* The breakpoint is entirely after the chunk of memory we are
667 /* Copy the breakpoint from the shadow contents, and recurse for
668 the things before and after. */
670 /* Offset within shadow_contents. */
673 if (bp_addr < memaddr)
675 /* Only copy the second part of the breakpoint. */
676 bp_size -= memaddr - bp_addr;
677 bptoffset = memaddr - bp_addr;
681 if (bp_addr + bp_size > memaddr + len)
683 /* Only copy the first part of the breakpoint. */
684 bp_size -= (bp_addr + bp_size) - (memaddr + len);
687 memcpy (myaddr + bp_addr - memaddr,
688 b->shadow_contents + bptoffset, bp_size);
690 if (bp_addr > memaddr)
692 /* Copy the section of memory before the breakpoint. */
693 status = read_memory_nobpt (memaddr, myaddr, bp_addr - memaddr);
698 if (bp_addr + bp_size < memaddr + len)
700 /* Copy the section of memory after the breakpoint. */
701 status = read_memory_nobpt (bp_addr + bp_size,
702 myaddr + bp_addr + bp_size - memaddr,
703 memaddr + len - (bp_addr + bp_size));
710 /* Nothing overlaps. Just call read_memory_noerr. */
711 return target_read_memory (memaddr, myaddr, len);
715 /* A wrapper function for inserting catchpoints. */
717 insert_catchpoint (struct ui_out *uo, void *args)
719 struct breakpoint *b = (struct breakpoint *) args;
725 val = target_insert_fork_catchpoint (PIDGET (inferior_ptid));
728 val = target_insert_vfork_catchpoint (PIDGET (inferior_ptid));
731 val = target_insert_exec_catchpoint (PIDGET (inferior_ptid));
734 internal_error (__FILE__, __LINE__, "unknown breakpoint type");
739 throw_exception (RETURN_ERROR);
744 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
745 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
746 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
748 NOTE drow/2003-09-09: This routine could be broken down to an object-style
749 method for each breakpoint or catchpoint type. */
751 insert_bp_location (struct bp_location *bpt,
752 struct ui_file *tmp_error_stream,
753 int *disabled_breaks, int *process_warning,
754 int *hw_breakpoint_error)
758 /* Permanent breakpoints cannot be inserted or removed. Disabled
759 breakpoints should not be inserted. */
760 if (bpt->owner->enable_state != bp_enabled)
763 if (bpt->inserted || bpt->duplicate)
766 if (bpt->loc_type == bp_loc_software_breakpoint
767 || bpt->loc_type == bp_loc_hardware_breakpoint)
769 /* First check to see if we have to handle an overlay. */
770 if (overlay_debugging == ovly_off
771 || bpt->section == NULL
772 || !(section_is_overlay (bpt->section)))
774 /* No overlay handling: just set the breakpoint. */
776 if (bpt->loc_type == bp_loc_hardware_breakpoint)
777 val = target_insert_hw_breakpoint (bpt->address,
778 bpt->shadow_contents);
780 val = target_insert_breakpoint (bpt->address,
781 bpt->shadow_contents);
785 /* This breakpoint is in an overlay section.
786 Shall we set a breakpoint at the LMA? */
787 if (!overlay_events_enabled)
789 /* Yes -- overlay event support is not active,
790 so we must try to set a breakpoint at the LMA.
791 This will not work for a hardware breakpoint. */
792 if (bpt->loc_type == bp_loc_hardware_breakpoint)
793 warning ("hardware breakpoint %d not supported in overlay!\n",
797 CORE_ADDR addr = overlay_unmapped_address (bpt->address,
799 /* Set a software (trap) breakpoint at the LMA. */
800 val = target_insert_breakpoint (addr, bpt->shadow_contents);
802 fprintf_unfiltered (tmp_error_stream,
803 "Overlay breakpoint %d failed: in ROM?",
807 /* Shall we set a breakpoint at the VMA? */
808 if (section_is_mapped (bpt->section))
810 /* Yes. This overlay section is mapped into memory. */
811 if (bpt->loc_type == bp_loc_hardware_breakpoint)
812 val = target_insert_hw_breakpoint (bpt->address,
813 bpt->shadow_contents);
815 val = target_insert_breakpoint (bpt->address,
816 bpt->shadow_contents);
820 /* No. This breakpoint will not be inserted.
821 No error, but do not mark the bp as 'inserted'. */
828 /* Can't set the breakpoint. */
829 #if defined (DISABLE_UNSETTABLE_BREAK)
830 if (DISABLE_UNSETTABLE_BREAK (bpt->address))
832 /* See also: disable_breakpoints_in_shlibs. */
834 bpt->owner->enable_state = bp_shlib_disabled;
835 if (!*disabled_breaks)
837 fprintf_unfiltered (tmp_error_stream,
838 "Cannot insert breakpoint %d.\n",
840 fprintf_unfiltered (tmp_error_stream,
841 "Temporarily disabling shared library breakpoints:\n");
843 *disabled_breaks = 1;
844 fprintf_unfiltered (tmp_error_stream,
845 "breakpoint #%d\n", bpt->owner->number);
850 #ifdef ONE_PROCESS_WRITETEXT
851 *process_warning = 1;
853 if (bpt->loc_type == bp_loc_hardware_breakpoint)
855 *hw_breakpoint_error = 1;
856 fprintf_unfiltered (tmp_error_stream,
857 "Cannot insert hardware breakpoint %d.\n",
862 fprintf_unfiltered (tmp_error_stream,
863 "Cannot insert breakpoint %d.\n",
865 fprintf_filtered (tmp_error_stream,
866 "Error accessing memory address ");
867 print_address_numeric (bpt->address, 1, tmp_error_stream);
868 fprintf_filtered (tmp_error_stream, ": %s.\n",
869 safe_strerror (val));
880 else if (bpt->loc_type == bp_loc_hardware_watchpoint
881 /* NOTE drow/2003-09-08: This state only exists for removing
882 watchpoints. It's not clear that it's necessary... */
883 && bpt->owner->disposition != disp_del_at_next_stop)
885 /* FIXME drow/2003-09-08: This code sets multiple hardware watchpoints
886 based on the expression. Ideally this should happen at a higher level,
887 and there should be one bp_location for each computed address we
888 must watch. As soon as a many-to-one mapping is available I'll
891 struct frame_info *saved_frame;
892 int saved_level, within_current_scope;
893 struct value *mark = value_mark ();
896 /* Save the current frame and level so we can restore it after
897 evaluating the watchpoint expression on its own frame. */
898 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
899 took a frame parameter, so that we didn't have to change the
901 saved_frame = deprecated_selected_frame;
902 saved_level = frame_relative_level (deprecated_selected_frame);
904 /* Determine if the watchpoint is within scope. */
905 if (bpt->owner->exp_valid_block == NULL)
906 within_current_scope = 1;
909 struct frame_info *fi;
910 fi = frame_find_by_id (bpt->owner->watchpoint_frame);
911 within_current_scope = (fi != NULL);
912 if (within_current_scope)
916 if (within_current_scope)
918 /* Evaluate the expression and cut the chain of values
919 produced off from the value chain.
921 Make sure the value returned isn't lazy; we use
922 laziness to determine what memory GDB actually needed
923 in order to compute the value of the expression. */
924 v = evaluate_expression (bpt->owner->exp);
926 value_release_to_mark (mark);
928 bpt->owner->val_chain = v;
931 /* Look at each value on the value chain. */
932 for (; v; v = v->next)
934 /* If it's a memory location, and GDB actually needed
935 its contents to evaluate the expression, then we
937 if (VALUE_LVAL (v) == lval_memory
940 struct type *vtype = check_typedef (VALUE_TYPE (v));
942 /* We only watch structs and arrays if user asked
943 for it explicitly, never if they just happen to
944 appear in the middle of some value chain. */
945 if (v == bpt->owner->val_chain
946 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
947 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
952 addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
953 len = TYPE_LENGTH (VALUE_TYPE (v));
955 if (bpt->owner->type == bp_read_watchpoint)
957 else if (bpt->owner->type == bp_access_watchpoint)
960 val = target_insert_watchpoint (addr, len, type);
963 /* Don't exit the loop, try to insert
964 every value on the value chain. That's
965 because we will be removing all the
966 watches below, and removing a
967 watchpoint we didn't insert could have
975 /* Failure to insert a watchpoint on any memory value in the
976 value chain brings us here. */
979 remove_breakpoint (bpt->owner, mark_uninserted);
980 *hw_breakpoint_error = 1;
981 fprintf_unfiltered (tmp_error_stream,
982 "Could not insert hardware watchpoint %d.\n",
989 printf_filtered ("Hardware watchpoint %d deleted ", bpt->owner->number);
990 printf_filtered ("because the program has left the block \n");
991 printf_filtered ("in which its expression is valid.\n");
992 if (bpt->owner->related_breakpoint)
993 bpt->owner->related_breakpoint->disposition = disp_del_at_next_stop;
994 bpt->owner->disposition = disp_del_at_next_stop;
997 /* Restore the frame and level. */
998 if (saved_frame != deprecated_selected_frame
999 || saved_level != frame_relative_level (deprecated_selected_frame))
1000 select_frame (saved_frame);
1005 else if (ep_is_exception_catchpoint (bpt->owner))
1007 /* FIXME drow/2003-09-09: This code sets both a catchpoint and a
1008 breakpoint. Once again, it would be better if this was represented
1009 as two bp_locations. */
1011 /* If we get here, we must have a callback mechanism for exception
1012 events -- with g++ style embedded label support, we insert
1013 ordinary breakpoints and not catchpoints. */
1014 val = target_insert_breakpoint (bpt->address, bpt->shadow_contents);
1017 /* Couldn't set breakpoint for some reason */
1018 fprintf_unfiltered (tmp_error_stream,
1019 "Cannot insert catchpoint %d; disabling it.\n",
1020 bpt->owner->number);
1021 fprintf_filtered (tmp_error_stream,
1022 "Error accessing memory address ");
1023 print_address_numeric (bpt->address, 1, tmp_error_stream);
1024 fprintf_filtered (tmp_error_stream, ": %s.\n",
1025 safe_strerror (val));
1026 bpt->owner->enable_state = bp_disabled;
1030 /* Bp set, now make sure callbacks are enabled */
1031 /* Format possible error msg */
1032 char *message = xstrprintf ("Error inserting catchpoint %d:\n",
1033 bpt->owner->number);
1034 struct cleanup *cleanups = make_cleanup (xfree, message);
1036 args_for_catchpoint_enable args;
1037 args.kind = bpt->owner->type == bp_catch_catch ?
1038 EX_EVENT_CATCH : EX_EVENT_THROW;
1040 val = catch_errors (cover_target_enable_exception_callback,
1041 &args, message, RETURN_MASK_ALL);
1042 do_cleanups (cleanups);
1043 if (val != 0 && val != -1)
1046 /* Check if something went wrong; val == 0 can be ignored */
1049 /* something went wrong */
1050 fprintf_unfiltered (tmp_error_stream,
1051 "Cannot insert catchpoint %d; disabling it.\n",
1052 bpt->owner->number);
1053 bpt->owner->enable_state = bp_disabled;
1060 else if (bpt->owner->type == bp_catch_fork
1061 || bpt->owner->type == bp_catch_vfork
1062 || bpt->owner->type == bp_catch_exec)
1064 char *prefix = xstrprintf ("warning: inserting catchpoint %d: ",
1065 bpt->owner->number);
1066 struct cleanup *cleanups = make_cleanup (xfree, prefix);
1067 val = catch_exceptions (uiout, insert_catchpoint, bpt->owner, prefix,
1069 do_cleanups (cleanups);
1071 bpt->owner->enable_state = bp_disabled;
1080 /* insert_breakpoints is used when starting or continuing the program.
1081 remove_breakpoints is used when the program stops.
1082 Both return zero if successful,
1083 or an `errno' value if could not write the inferior. */
1086 insert_breakpoints (void)
1088 struct bp_location *b, *temp;
1089 int return_val = 0; /* return success code. */
1091 int disabled_breaks = 0;
1092 int hw_breakpoint_error = 0;
1093 int process_warning = 0;
1095 struct ui_file *tmp_error_stream = mem_fileopen ();
1096 make_cleanup_ui_file_delete (tmp_error_stream);
1098 /* Explicitly mark the warning -- this will only be printed if
1099 there was an error. */
1100 fprintf_unfiltered (tmp_error_stream, "Warning:\n");
1102 ALL_BP_LOCATIONS_SAFE (b, temp)
1104 /* Permanent breakpoints cannot be inserted or removed. Disabled
1105 breakpoints should not be inserted. */
1106 if (b->owner->enable_state != bp_enabled)
1109 /* FIXME drow/2003-10-07: This code should be pushed elsewhere when
1110 hardware watchpoints are split into multiple loc breakpoints. */
1111 if ((b->loc_type == bp_loc_hardware_watchpoint
1112 || b->owner->type == bp_watchpoint) && !b->owner->val)
1115 val = evaluate_expression (b->owner->exp);
1116 release_value (val);
1117 if (VALUE_LAZY (val))
1118 value_fetch_lazy (val);
1119 b->owner->val = val;
1122 val = insert_bp_location (b, tmp_error_stream,
1123 &disabled_breaks, &process_warning,
1124 &hw_breakpoint_error);
1131 /* If a hardware breakpoint or watchpoint was inserted, add a
1132 message about possibly exhausted resources. */
1133 if (hw_breakpoint_error)
1135 fprintf_unfiltered (tmp_error_stream,
1136 "Could not insert hardware breakpoints:\n\
1137 You may have requested too many hardware breakpoints/watchpoints.\n");
1139 #ifdef ONE_PROCESS_WRITETEXT
1140 if (process_warning)
1141 fprintf_unfiltered (tmp_error_stream,
1142 "The same program may be running in another process.");
1144 target_terminal_ours_for_output ();
1145 error_stream (tmp_error_stream);
1151 remove_breakpoints (void)
1153 struct breakpoint *b;
1158 if (b->loc->inserted)
1160 val = remove_breakpoint (b, mark_uninserted);
1169 remove_hw_watchpoints (void)
1171 struct breakpoint *b;
1176 if (b->loc->inserted
1177 && (b->type == bp_hardware_watchpoint
1178 || b->type == bp_read_watchpoint
1179 || b->type == bp_access_watchpoint))
1181 val = remove_breakpoint (b, mark_uninserted);
1190 reattach_breakpoints (int pid)
1192 struct breakpoint *b;
1194 struct cleanup *old_chain = save_inferior_ptid ();
1196 /* Set inferior_ptid; remove_breakpoint uses this global. */
1197 inferior_ptid = pid_to_ptid (pid);
1200 if (b->loc->inserted)
1202 remove_breakpoint (b, mark_inserted);
1203 if (b->type == bp_hardware_breakpoint)
1204 val = target_insert_hw_breakpoint (b->loc->address, b->loc->shadow_contents);
1206 val = target_insert_breakpoint (b->loc->address, b->loc->shadow_contents);
1209 do_cleanups (old_chain);
1214 do_cleanups (old_chain);
1219 update_breakpoints_after_exec (void)
1221 struct breakpoint *b;
1222 struct breakpoint *temp;
1224 /* Doing this first prevents the badness of having delete_breakpoint()
1225 write a breakpoint's current "shadow contents" to lift the bp. That
1226 shadow is NOT valid after an exec()! */
1227 mark_breakpoints_out ();
1229 ALL_BREAKPOINTS_SAFE (b, temp)
1231 /* Solib breakpoints must be explicitly reset after an exec(). */
1232 if (b->type == bp_shlib_event)
1234 delete_breakpoint (b);
1238 /* Thread event breakpoints must be set anew after an exec(),
1239 as must overlay event breakpoints. */
1240 if (b->type == bp_thread_event || b->type == bp_overlay_event)
1242 delete_breakpoint (b);
1246 /* Step-resume breakpoints are meaningless after an exec(). */
1247 if (b->type == bp_step_resume)
1249 delete_breakpoint (b);
1253 /* Ditto the sigtramp handler breakpoints. */
1254 if (b->type == bp_through_sigtramp)
1256 delete_breakpoint (b);
1260 /* Ditto the exception-handling catchpoints. */
1261 if ((b->type == bp_catch_catch) || (b->type == bp_catch_throw))
1263 delete_breakpoint (b);
1267 /* Don't delete an exec catchpoint, because else the inferior
1268 won't stop when it ought!
1270 Similarly, we probably ought to keep vfork catchpoints, 'cause
1271 on this target, we may not be able to stop when the vfork is
1272 seen, but only when the subsequent exec is seen. (And because
1273 deleting fork catchpoints here but not vfork catchpoints will
1274 seem mysterious to users, keep those too.)
1276 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1277 target address field, if any, is sufficient to have it be reset
1278 automagically. Certainly on HP-UX that's true.
1280 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1281 valid code address on some platforms (like the mn10300
1282 simulators). We shouldn't assign any special interpretation to
1283 a breakpoint with a zero address. And in fact, GDB doesn't ---
1284 I can't see what that comment above is talking about. As far
1285 as I can tell, setting the address of a
1286 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1287 is meaningless, since those are implemented with HP-UX kernel
1288 hackery, not by storing breakpoint instructions somewhere. */
1289 if ((b->type == bp_catch_exec) ||
1290 (b->type == bp_catch_vfork) ||
1291 (b->type == bp_catch_fork))
1293 b->loc->address = (CORE_ADDR) NULL;
1297 /* bp_finish is a special case. The only way we ought to be able
1298 to see one of these when an exec() has happened, is if the user
1299 caught a vfork, and then said "finish". Ordinarily a finish just
1300 carries them to the call-site of the current callee, by setting
1301 a temporary bp there and resuming. But in this case, the finish
1302 will carry them entirely through the vfork & exec.
1304 We don't want to allow a bp_finish to remain inserted now. But
1305 we can't safely delete it, 'cause finish_command has a handle to
1306 the bp on a bpstat, and will later want to delete it. There's a
1307 chance (and I've seen it happen) that if we delete the bp_finish
1308 here, that its storage will get reused by the time finish_command
1309 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1310 We really must allow finish_command to delete a bp_finish.
1312 In the absense of a general solution for the "how do we know
1313 it's safe to delete something others may have handles to?"
1314 problem, what we'll do here is just uninsert the bp_finish, and
1315 let finish_command delete it.
1317 (We know the bp_finish is "doomed" in the sense that it's
1318 momentary, and will be deleted as soon as finish_command sees
1319 the inferior stopped. So it doesn't matter that the bp's
1320 address is probably bogus in the new a.out, unlike e.g., the
1321 solib breakpoints.) */
1323 if (b->type == bp_finish)
1328 /* Without a symbolic address, we have little hope of the
1329 pre-exec() address meaning the same thing in the post-exec()
1331 if (b->addr_string == NULL)
1333 delete_breakpoint (b);
1337 /* If this breakpoint has survived the above battery of checks, then
1338 it must have a symbolic address. Be sure that it gets reevaluated
1339 to a target address, rather than reusing the old evaluation.
1341 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1342 for bp_catch_exec and friends, I'm pretty sure this is entirely
1343 unnecessary. A call to breakpoint_re_set_one always recomputes
1344 the breakpoint's address from scratch, or deletes it if it can't.
1345 So I think this assignment could be deleted without effect. */
1346 b->loc->address = (CORE_ADDR) NULL;
1348 /* FIXME what about longjmp breakpoints? Re-create them here? */
1349 create_overlay_event_breakpoint ("_ovly_debug_event");
1353 detach_breakpoints (int pid)
1355 struct breakpoint *b;
1357 struct cleanup *old_chain = save_inferior_ptid ();
1359 if (pid == PIDGET (inferior_ptid))
1360 error ("Cannot detach breakpoints of inferior_ptid");
1362 /* Set inferior_ptid; remove_breakpoint uses this global. */
1363 inferior_ptid = pid_to_ptid (pid);
1366 if (b->loc->inserted)
1368 val = remove_breakpoint (b, mark_inserted);
1371 do_cleanups (old_chain);
1376 do_cleanups (old_chain);
1381 remove_breakpoint (struct breakpoint *b, insertion_state_t is)
1385 if (b->enable_state == bp_permanent)
1386 /* Permanent breakpoints cannot be inserted or removed. */
1389 if (b->type == bp_none)
1390 warning ("attempted to remove apparently deleted breakpoint #%d?",
1393 if (b->type != bp_watchpoint
1394 && b->type != bp_hardware_watchpoint
1395 && b->type != bp_read_watchpoint
1396 && b->type != bp_access_watchpoint
1397 && b->type != bp_catch_fork
1398 && b->type != bp_catch_vfork
1399 && b->type != bp_catch_exec
1400 && b->type != bp_catch_catch
1401 && b->type != bp_catch_throw)
1403 /* "Normal" instruction breakpoint: either the standard
1404 trap-instruction bp (bp_breakpoint), or a
1405 bp_hardware_breakpoint. */
1407 /* First check to see if we have to handle an overlay. */
1408 if (overlay_debugging == ovly_off
1409 || b->loc->section == NULL
1410 || !(section_is_overlay (b->loc->section)))
1412 /* No overlay handling: just remove the breakpoint. */
1414 if (b->type == bp_hardware_breakpoint)
1415 val = target_remove_hw_breakpoint (b->loc->address,
1416 b->loc->shadow_contents);
1418 val = target_remove_breakpoint (b->loc->address, b->loc->shadow_contents);
1422 /* This breakpoint is in an overlay section.
1423 Did we set a breakpoint at the LMA? */
1424 if (!overlay_events_enabled)
1426 /* Yes -- overlay event support is not active, so we
1427 should have set a breakpoint at the LMA. Remove it.
1429 CORE_ADDR addr = overlay_unmapped_address (b->loc->address,
1431 /* Ignore any failures: if the LMA is in ROM, we will
1432 have already warned when we failed to insert it. */
1433 if (b->type != bp_hardware_breakpoint)
1434 target_remove_hw_breakpoint (addr, b->loc->shadow_contents);
1436 target_remove_breakpoint (addr, b->loc->shadow_contents);
1438 /* Did we set a breakpoint at the VMA?
1439 If so, we will have marked the breakpoint 'inserted'. */
1440 if (b->loc->inserted)
1442 /* Yes -- remove it. Previously we did not bother to
1443 remove the breakpoint if the section had been
1444 unmapped, but let's not rely on that being safe. We
1445 don't know what the overlay manager might do. */
1446 if (b->type == bp_hardware_breakpoint)
1447 val = target_remove_hw_breakpoint (b->loc->address,
1448 b->loc->shadow_contents);
1450 val = target_remove_breakpoint (b->loc->address,
1451 b->loc->shadow_contents);
1455 /* No -- not inserted, so no need to remove. No error. */
1461 b->loc->inserted = (is == mark_inserted);
1463 else if ((b->type == bp_hardware_watchpoint ||
1464 b->type == bp_read_watchpoint ||
1465 b->type == bp_access_watchpoint)
1466 && b->enable_state == bp_enabled
1467 && !b->loc->duplicate)
1472 b->loc->inserted = (is == mark_inserted);
1473 /* Walk down the saved value chain. */
1474 for (v = b->val_chain; v; v = v->next)
1476 /* For each memory reference remove the watchpoint
1478 if (VALUE_LVAL (v) == lval_memory
1479 && ! VALUE_LAZY (v))
1481 struct type *vtype = check_typedef (VALUE_TYPE (v));
1483 if (v == b->val_chain
1484 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
1485 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
1490 addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
1491 len = TYPE_LENGTH (VALUE_TYPE (v));
1493 if (b->type == bp_read_watchpoint)
1495 else if (b->type == bp_access_watchpoint)
1498 val = target_remove_watchpoint (addr, len, type);
1500 b->loc->inserted = 1;
1505 /* Failure to remove any of the hardware watchpoints comes here. */
1506 if ((is == mark_uninserted) && (b->loc->inserted))
1507 warning ("Could not remove hardware watchpoint %d.",
1510 /* Free the saved value chain. We will construct a new one
1511 the next time the watchpoint is inserted. */
1512 for (v = b->val_chain; v; v = n)
1517 b->val_chain = NULL;
1519 else if ((b->type == bp_catch_fork ||
1520 b->type == bp_catch_vfork ||
1521 b->type == bp_catch_exec)
1522 && b->enable_state == bp_enabled
1523 && !b->loc->duplicate)
1529 val = target_remove_fork_catchpoint (PIDGET (inferior_ptid));
1531 case bp_catch_vfork:
1532 val = target_remove_vfork_catchpoint (PIDGET (inferior_ptid));
1535 val = target_remove_exec_catchpoint (PIDGET (inferior_ptid));
1538 warning ("Internal error, %s line %d.", __FILE__, __LINE__);
1543 b->loc->inserted = (is == mark_inserted);
1545 else if ((b->type == bp_catch_catch ||
1546 b->type == bp_catch_throw)
1547 && b->enable_state == bp_enabled
1548 && !b->loc->duplicate)
1551 val = target_remove_breakpoint (b->loc->address, b->loc->shadow_contents);
1554 b->loc->inserted = (is == mark_inserted);
1556 else if (ep_is_exception_catchpoint (b)
1557 && b->loc->inserted /* sometimes previous insert doesn't happen */
1558 && b->enable_state == bp_enabled
1559 && !b->loc->duplicate)
1562 val = target_remove_breakpoint (b->loc->address, b->loc->shadow_contents);
1566 b->loc->inserted = (is == mark_inserted);
1572 /* Clear the "inserted" flag in all breakpoints. */
1575 mark_breakpoints_out (void)
1577 struct bp_location *bpt;
1579 ALL_BP_LOCATIONS (bpt)
1583 /* Clear the "inserted" flag in all breakpoints and delete any
1584 breakpoints which should go away between runs of the program.
1586 Plus other such housekeeping that has to be done for breakpoints
1589 Note: this function gets called at the end of a run (by
1590 generic_mourn_inferior) and when a run begins (by
1591 init_wait_for_inferior). */
1596 breakpoint_init_inferior (enum inf_context context)
1598 struct breakpoint *b, *temp;
1599 struct bp_location *bpt;
1600 static int warning_needed = 0;
1602 ALL_BP_LOCATIONS (bpt)
1605 ALL_BREAKPOINTS_SAFE (b, temp)
1610 case bp_watchpoint_scope:
1612 /* If the call dummy breakpoint is at the entry point it will
1613 cause problems when the inferior is rerun, so we better
1616 Also get rid of scope breakpoints. */
1617 delete_breakpoint (b);
1621 case bp_hardware_watchpoint:
1622 case bp_read_watchpoint:
1623 case bp_access_watchpoint:
1625 /* Likewise for watchpoints on local expressions. */
1626 if (b->exp_valid_block != NULL)
1627 delete_breakpoint (b);
1628 if (context == inf_starting)
1630 /* Reset val field to force reread of starting value
1631 in insert_breakpoints. */
1633 value_free (b->val);
1638 /* Likewise for exception catchpoints in dynamic-linked
1639 executables where required */
1640 if (ep_is_exception_catchpoint (b) &&
1641 exception_catchpoints_are_fragile)
1644 delete_breakpoint (b);
1650 if (exception_catchpoints_are_fragile)
1651 exception_support_initialized = 0;
1653 /* Don't issue the warning unless it's really needed... */
1654 if (warning_needed && (context != inf_exited))
1656 warning ("Exception catchpoints from last run were deleted.");
1657 warning ("You must reinsert them explicitly.");
1662 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1663 exists at PC. It returns ordinary_breakpoint_here if it's an
1664 ordinary breakpoint, or permanent_breakpoint_here if it's a
1665 permanent breakpoint.
1666 - When continuing from a location with an ordinary breakpoint, we
1667 actually single step once before calling insert_breakpoints.
1668 - When continuing from a localion with a permanent breakpoint, we
1669 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1670 the target, to advance the PC past the breakpoint. */
1672 enum breakpoint_here
1673 breakpoint_here_p (CORE_ADDR pc)
1675 struct bp_location *bpt;
1676 int any_breakpoint_here = 0;
1678 ALL_BP_LOCATIONS (bpt)
1680 if (bpt->loc_type != bp_loc_software_breakpoint
1681 && bpt->loc_type != bp_loc_hardware_breakpoint)
1684 if ((bpt->owner->enable_state == bp_enabled
1685 || bpt->owner->enable_state == bp_permanent)
1686 && bpt->address == pc) /* bp is enabled and matches pc */
1688 if (overlay_debugging
1689 && section_is_overlay (bpt->section)
1690 && !section_is_mapped (bpt->section))
1691 continue; /* unmapped overlay -- can't be a match */
1692 else if (bpt->owner->enable_state == bp_permanent)
1693 return permanent_breakpoint_here;
1695 any_breakpoint_here = 1;
1699 return any_breakpoint_here ? ordinary_breakpoint_here : 0;
1703 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1704 but it only returns true if there is actually a breakpoint inserted
1708 breakpoint_inserted_here_p (CORE_ADDR pc)
1710 struct bp_location *bpt;
1712 ALL_BP_LOCATIONS (bpt)
1714 if (bpt->loc_type != bp_loc_software_breakpoint
1715 && bpt->loc_type != bp_loc_hardware_breakpoint)
1719 && bpt->address == pc) /* bp is inserted and matches pc */
1721 if (overlay_debugging
1722 && section_is_overlay (bpt->section)
1723 && !section_is_mapped (bpt->section))
1724 continue; /* unmapped overlay -- can't be a match */
1733 /* Return nonzero if FRAME is a dummy frame. We can't use
1734 DEPRECATED_PC_IN_CALL_DUMMY because figuring out the saved SP would
1735 take too much time, at least using frame_register() on the 68k.
1736 This means that for this function to work right a port must use the
1737 bp_call_dummy breakpoint. */
1740 deprecated_frame_in_dummy (struct frame_info *frame)
1742 struct breakpoint *b;
1744 /* This function is used by two files: get_frame_type(), after first
1745 checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and
1746 sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */
1747 gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES);
1751 if (b->type == bp_call_dummy
1752 && frame_id_eq (b->frame_id, get_frame_id (frame))
1753 /* We need to check the PC as well as the frame on the sparc,
1754 for signals.exp in the testsuite. */
1755 && (get_frame_pc (frame)
1757 - DEPRECATED_SIZEOF_CALL_DUMMY_WORDS / sizeof (LONGEST) * DEPRECATED_REGISTER_SIZE))
1758 && get_frame_pc (frame) <= b->loc->address)
1764 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1765 PC is valid for process/thread PTID. */
1768 breakpoint_thread_match (CORE_ADDR pc, ptid_t ptid)
1770 struct bp_location *bpt;
1773 thread = pid_to_thread_id (ptid);
1775 ALL_BP_LOCATIONS (bpt)
1777 if (bpt->loc_type != bp_loc_software_breakpoint
1778 && bpt->loc_type != bp_loc_hardware_breakpoint)
1781 if ((bpt->owner->enable_state == bp_enabled
1782 || bpt->owner->enable_state == bp_permanent)
1783 && bpt->address == pc
1784 && (bpt->owner->thread == -1 || bpt->owner->thread == thread))
1786 if (overlay_debugging
1787 && section_is_overlay (bpt->section)
1788 && !section_is_mapped (bpt->section))
1789 continue; /* unmapped overlay -- can't be a match */
1799 /* bpstat stuff. External routines' interfaces are documented
1803 ep_is_catchpoint (struct breakpoint *ep)
1806 (ep->type == bp_catch_load)
1807 || (ep->type == bp_catch_unload)
1808 || (ep->type == bp_catch_fork)
1809 || (ep->type == bp_catch_vfork)
1810 || (ep->type == bp_catch_exec)
1811 || (ep->type == bp_catch_catch)
1812 || (ep->type == bp_catch_throw);
1814 /* ??rehrauer: Add more kinds here, as are implemented... */
1818 ep_is_shlib_catchpoint (struct breakpoint *ep)
1821 (ep->type == bp_catch_load)
1822 || (ep->type == bp_catch_unload);
1826 ep_is_exception_catchpoint (struct breakpoint *ep)
1829 (ep->type == bp_catch_catch)
1830 || (ep->type == bp_catch_throw);
1833 /* Clear a bpstat so that it says we are not at any breakpoint.
1834 Also free any storage that is part of a bpstat. */
1837 bpstat_clear (bpstat *bsp)
1848 if (p->old_val != NULL)
1849 value_free (p->old_val);
1850 free_command_lines (&p->commands);
1857 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1858 is part of the bpstat is copied as well. */
1861 bpstat_copy (bpstat bs)
1865 bpstat retval = NULL;
1870 for (; bs != NULL; bs = bs->next)
1872 tmp = (bpstat) xmalloc (sizeof (*tmp));
1873 memcpy (tmp, bs, sizeof (*tmp));
1874 if (bs->commands != NULL)
1875 tmp->commands = copy_command_lines (bs->commands);
1876 if (bs->old_val != NULL)
1877 tmp->old_val = value_copy (bs->old_val);
1880 /* This is the first thing in the chain. */
1890 /* Find the bpstat associated with this breakpoint */
1893 bpstat_find_breakpoint (bpstat bsp, struct breakpoint *breakpoint)
1898 for (; bsp != NULL; bsp = bsp->next)
1900 if (bsp->breakpoint_at == breakpoint)
1906 /* Find a step_resume breakpoint associated with this bpstat.
1907 (If there are multiple step_resume bp's on the list, this function
1908 will arbitrarily pick one.)
1910 It is an error to use this function if BPSTAT doesn't contain a
1911 step_resume breakpoint.
1913 See wait_for_inferior's use of this function. */
1915 bpstat_find_step_resume_breakpoint (bpstat bsp)
1920 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1922 current_thread = pid_to_thread_id (inferior_ptid);
1924 for (; bsp != NULL; bsp = bsp->next)
1926 if ((bsp->breakpoint_at != NULL) &&
1927 (bsp->breakpoint_at->type == bp_step_resume) &&
1928 (bsp->breakpoint_at->thread == current_thread ||
1929 bsp->breakpoint_at->thread == -1))
1930 return bsp->breakpoint_at;
1933 error ("Internal error (no step_resume breakpoint found)");
1937 /* Return the breakpoint number of the first breakpoint we are stopped
1938 at. *BSP upon return is a bpstat which points to the remaining
1939 breakpoints stopped at (but which is not guaranteed to be good for
1940 anything but further calls to bpstat_num).
1941 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1944 bpstat_num (bpstat *bsp)
1946 struct breakpoint *b;
1949 return 0; /* No more breakpoint values */
1952 b = (*bsp)->breakpoint_at;
1953 *bsp = (*bsp)->next;
1955 return -1; /* breakpoint that's been deleted since */
1957 return b->number; /* We have its number */
1961 /* Modify BS so that the actions will not be performed. */
1964 bpstat_clear_actions (bpstat bs)
1966 for (; bs != NULL; bs = bs->next)
1968 free_command_lines (&bs->commands);
1969 if (bs->old_val != NULL)
1971 value_free (bs->old_val);
1977 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1979 cleanup_executing_breakpoints (void *ignore)
1981 executing_breakpoint_commands = 0;
1984 /* Execute all the commands associated with all the breakpoints at this
1985 location. Any of these commands could cause the process to proceed
1986 beyond this point, etc. We look out for such changes by checking
1987 the global "breakpoint_proceeded" after each command. */
1990 bpstat_do_actions (bpstat *bsp)
1993 struct cleanup *old_chain;
1994 struct command_line *cmd;
1996 /* Avoid endless recursion if a `source' command is contained
1998 if (executing_breakpoint_commands)
2001 executing_breakpoint_commands = 1;
2002 old_chain = make_cleanup (cleanup_executing_breakpoints, 0);
2005 /* Note that (as of this writing), our callers all appear to
2006 be passing us the address of global stop_bpstat. And, if
2007 our calls to execute_control_command cause the inferior to
2008 proceed, that global (and hence, *bsp) will change.
2010 We must be careful to not touch *bsp unless the inferior
2011 has not proceeded. */
2013 /* This pointer will iterate over the list of bpstat's. */
2016 breakpoint_proceeded = 0;
2017 for (; bs != NULL; bs = bs->next)
2022 execute_control_command (cmd);
2024 if (breakpoint_proceeded)
2029 if (breakpoint_proceeded)
2030 /* The inferior is proceeded by the command; bomb out now.
2031 The bpstat chain has been blown away by wait_for_inferior.
2032 But since execution has stopped again, there is a new bpstat
2033 to look at, so start over. */
2036 free_command_lines (&bs->commands);
2038 do_cleanups (old_chain);
2041 /* This is the normal print function for a bpstat. In the future,
2042 much of this logic could (should?) be moved to bpstat_stop_status,
2043 by having it set different print_it values.
2045 Current scheme: When we stop, bpstat_print() is called. It loops
2046 through the bpstat list of things causing this stop, calling the
2047 print_bp_stop_message function on each one. The behavior of the
2048 print_bp_stop_message function depends on the print_it field of
2049 bpstat. If such field so indicates, call this function here.
2051 Return values from this routine (ultimately used by bpstat_print()
2052 and normal_stop() to decide what to do):
2053 PRINT_NOTHING: Means we already printed all we needed to print,
2054 don't print anything else.
2055 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2056 that something to be followed by a location.
2057 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2058 that something to be followed by a location.
2059 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2062 static enum print_stop_action
2063 print_it_typical (bpstat bs)
2065 struct cleanup *old_chain, *ui_out_chain;
2066 struct ui_stream *stb;
2067 stb = ui_out_stream_new (uiout);
2068 old_chain = make_cleanup_ui_out_stream_delete (stb);
2069 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2070 which has since been deleted. */
2071 if (bs->breakpoint_at == NULL)
2072 return PRINT_UNKNOWN;
2074 switch (bs->breakpoint_at->type)
2077 case bp_hardware_breakpoint:
2078 if (bs->breakpoint_at->loc->address != bs->breakpoint_at->loc->requested_address)
2079 breakpoint_adjustment_warning (bs->breakpoint_at->loc->requested_address,
2080 bs->breakpoint_at->loc->address,
2081 bs->breakpoint_at->number, 1);
2082 annotate_breakpoint (bs->breakpoint_at->number);
2083 ui_out_text (uiout, "\nBreakpoint ");
2084 if (ui_out_is_mi_like_p (uiout))
2085 ui_out_field_string (uiout, "reason", "breakpoint-hit");
2086 ui_out_field_int (uiout, "bkptno", bs->breakpoint_at->number);
2087 ui_out_text (uiout, ", ");
2088 return PRINT_SRC_AND_LOC;
2091 case bp_shlib_event:
2092 /* Did we stop because the user set the stop_on_solib_events
2093 variable? (If so, we report this as a generic, "Stopped due
2094 to shlib event" message.) */
2095 printf_filtered ("Stopped due to shared library event\n");
2096 return PRINT_NOTHING;
2099 case bp_thread_event:
2100 /* Not sure how we will get here.
2101 GDB should not stop for these breakpoints. */
2102 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2103 return PRINT_NOTHING;
2106 case bp_overlay_event:
2107 /* By analogy with the thread event, GDB should not stop for these. */
2108 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2109 return PRINT_NOTHING;
2113 annotate_catchpoint (bs->breakpoint_at->number);
2114 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
2115 printf_filtered ("loaded");
2116 printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname);
2117 return PRINT_SRC_AND_LOC;
2120 case bp_catch_unload:
2121 annotate_catchpoint (bs->breakpoint_at->number);
2122 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
2123 printf_filtered ("unloaded");
2124 printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname);
2125 return PRINT_SRC_AND_LOC;
2129 annotate_catchpoint (bs->breakpoint_at->number);
2130 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
2131 printf_filtered ("forked");
2132 printf_filtered (" process %d), ",
2133 bs->breakpoint_at->forked_inferior_pid);
2134 return PRINT_SRC_AND_LOC;
2137 case bp_catch_vfork:
2138 annotate_catchpoint (bs->breakpoint_at->number);
2139 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
2140 printf_filtered ("vforked");
2141 printf_filtered (" process %d), ",
2142 bs->breakpoint_at->forked_inferior_pid);
2143 return PRINT_SRC_AND_LOC;
2147 annotate_catchpoint (bs->breakpoint_at->number);
2148 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2149 bs->breakpoint_at->number,
2150 bs->breakpoint_at->exec_pathname);
2151 return PRINT_SRC_AND_LOC;
2154 case bp_catch_catch:
2155 if (current_exception_event &&
2156 (CURRENT_EXCEPTION_KIND == EX_EVENT_CATCH))
2158 annotate_catchpoint (bs->breakpoint_at->number);
2159 printf_filtered ("\nCatchpoint %d (exception caught), ",
2160 bs->breakpoint_at->number);
2161 printf_filtered ("throw location ");
2162 if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
2163 printf_filtered ("%s:%d",
2164 CURRENT_EXCEPTION_THROW_FILE,
2165 CURRENT_EXCEPTION_THROW_LINE);
2167 printf_filtered ("unknown");
2169 printf_filtered (", catch location ");
2170 if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
2171 printf_filtered ("%s:%d",
2172 CURRENT_EXCEPTION_CATCH_FILE,
2173 CURRENT_EXCEPTION_CATCH_LINE);
2175 printf_filtered ("unknown");
2177 printf_filtered ("\n");
2178 /* don't bother to print location frame info */
2179 return PRINT_SRC_ONLY;
2183 /* really throw, some other bpstat will handle it */
2184 return PRINT_UNKNOWN;
2188 case bp_catch_throw:
2189 if (current_exception_event &&
2190 (CURRENT_EXCEPTION_KIND == EX_EVENT_THROW))
2192 annotate_catchpoint (bs->breakpoint_at->number);
2193 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2194 bs->breakpoint_at->number);
2195 printf_filtered ("throw location ");
2196 if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
2197 printf_filtered ("%s:%d",
2198 CURRENT_EXCEPTION_THROW_FILE,
2199 CURRENT_EXCEPTION_THROW_LINE);
2201 printf_filtered ("unknown");
2203 printf_filtered (", catch location ");
2204 if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
2205 printf_filtered ("%s:%d",
2206 CURRENT_EXCEPTION_CATCH_FILE,
2207 CURRENT_EXCEPTION_CATCH_LINE);
2209 printf_filtered ("unknown");
2211 printf_filtered ("\n");
2212 /* don't bother to print location frame info */
2213 return PRINT_SRC_ONLY;
2217 /* really catch, some other bpstat will handle it */
2218 return PRINT_UNKNOWN;
2223 case bp_hardware_watchpoint:
2224 if (bs->old_val != NULL)
2226 annotate_watchpoint (bs->breakpoint_at->number);
2227 if (ui_out_is_mi_like_p (uiout))
2228 ui_out_field_string (uiout, "reason", "watchpoint-trigger");
2229 mention (bs->breakpoint_at);
2230 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "value");
2231 ui_out_text (uiout, "\nOld value = ");
2232 value_print (bs->old_val, stb->stream, 0, Val_pretty_default);
2233 ui_out_field_stream (uiout, "old", stb);
2234 ui_out_text (uiout, "\nNew value = ");
2235 value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default);
2236 ui_out_field_stream (uiout, "new", stb);
2237 do_cleanups (ui_out_chain);
2238 ui_out_text (uiout, "\n");
2239 value_free (bs->old_val);
2242 /* More than one watchpoint may have been triggered. */
2243 return PRINT_UNKNOWN;
2246 case bp_read_watchpoint:
2247 if (ui_out_is_mi_like_p (uiout))
2248 ui_out_field_string (uiout, "reason", "read-watchpoint-trigger");
2249 mention (bs->breakpoint_at);
2250 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "value");
2251 ui_out_text (uiout, "\nValue = ");
2252 value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default);
2253 ui_out_field_stream (uiout, "value", stb);
2254 do_cleanups (ui_out_chain);
2255 ui_out_text (uiout, "\n");
2256 return PRINT_UNKNOWN;
2259 case bp_access_watchpoint:
2260 if (bs->old_val != NULL)
2262 annotate_watchpoint (bs->breakpoint_at->number);
2263 if (ui_out_is_mi_like_p (uiout))
2264 ui_out_field_string (uiout, "reason", "access-watchpoint-trigger");
2265 mention (bs->breakpoint_at);
2266 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "value");
2267 ui_out_text (uiout, "\nOld value = ");
2268 value_print (bs->old_val, stb->stream, 0, Val_pretty_default);
2269 ui_out_field_stream (uiout, "old", stb);
2270 value_free (bs->old_val);
2272 ui_out_text (uiout, "\nNew value = ");
2276 mention (bs->breakpoint_at);
2277 if (ui_out_is_mi_like_p (uiout))
2278 ui_out_field_string (uiout, "reason", "access-watchpoint-trigger");
2279 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "value");
2280 ui_out_text (uiout, "\nValue = ");
2282 value_print (bs->breakpoint_at->val, stb->stream, 0,Val_pretty_default);
2283 ui_out_field_stream (uiout, "new", stb);
2284 do_cleanups (ui_out_chain);
2285 ui_out_text (uiout, "\n");
2286 return PRINT_UNKNOWN;
2289 /* Fall through, we don't deal with these types of breakpoints
2293 if (ui_out_is_mi_like_p (uiout))
2294 ui_out_field_string (uiout, "reason", "function-finished");
2295 return PRINT_UNKNOWN;
2299 if (ui_out_is_mi_like_p (uiout))
2300 ui_out_field_string (uiout, "reason", "location-reached");
2301 return PRINT_UNKNOWN;
2306 case bp_longjmp_resume:
2307 case bp_step_resume:
2308 case bp_through_sigtramp:
2309 case bp_watchpoint_scope:
2312 return PRINT_UNKNOWN;
2316 /* Generic routine for printing messages indicating why we
2317 stopped. The behavior of this function depends on the value
2318 'print_it' in the bpstat structure. Under some circumstances we
2319 may decide not to print anything here and delegate the task to
2322 static enum print_stop_action
2323 print_bp_stop_message (bpstat bs)
2325 switch (bs->print_it)
2328 /* Nothing should be printed for this bpstat entry. */
2329 return PRINT_UNKNOWN;
2333 /* We still want to print the frame, but we already printed the
2334 relevant messages. */
2335 return PRINT_SRC_AND_LOC;
2338 case print_it_normal:
2339 /* Normal case. Call the breakpoint's print_it method, or
2340 print_it_typical. */
2341 if (bs->breakpoint_at != NULL && bs->breakpoint_at->ops != NULL
2342 && bs->breakpoint_at->ops->print_it != NULL)
2343 return bs->breakpoint_at->ops->print_it (bs->breakpoint_at);
2345 return print_it_typical (bs);
2349 internal_error (__FILE__, __LINE__,
2350 "print_bp_stop_message: unrecognized enum value");
2355 /* Print a message indicating what happened. This is called from
2356 normal_stop(). The input to this routine is the head of the bpstat
2357 list - a list of the eventpoints that caused this stop. This
2358 routine calls the generic print routine for printing a message
2359 about reasons for stopping. This will print (for example) the
2360 "Breakpoint n," part of the output. The return value of this
2363 PRINT_UNKNOWN: Means we printed nothing
2364 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2365 code to print the location. An example is
2366 "Breakpoint 1, " which should be followed by
2368 PRINT_SRC_ONLY: Means we printed something, but there is no need
2369 to also print the location part of the message.
2370 An example is the catch/throw messages, which
2371 don't require a location appended to the end.
2372 PRINT_NOTHING: We have done some printing and we don't need any
2373 further info to be printed.*/
2375 enum print_stop_action
2376 bpstat_print (bpstat bs)
2380 /* Maybe another breakpoint in the chain caused us to stop.
2381 (Currently all watchpoints go on the bpstat whether hit or not.
2382 That probably could (should) be changed, provided care is taken
2383 with respect to bpstat_explains_signal). */
2384 for (; bs; bs = bs->next)
2386 val = print_bp_stop_message (bs);
2387 if (val == PRINT_SRC_ONLY
2388 || val == PRINT_SRC_AND_LOC
2389 || val == PRINT_NOTHING)
2393 /* We reached the end of the chain, or we got a null BS to start
2394 with and nothing was printed. */
2395 return PRINT_UNKNOWN;
2398 /* Evaluate the expression EXP and return 1 if value is zero.
2399 This is used inside a catch_errors to evaluate the breakpoint condition.
2400 The argument is a "struct expression *" that has been cast to char * to
2401 make it pass through catch_errors. */
2404 breakpoint_cond_eval (void *exp)
2406 struct value *mark = value_mark ();
2407 int i = !value_true (evaluate_expression ((struct expression *) exp));
2408 value_free_to_mark (mark);
2412 /* Allocate a new bpstat and chain it to the current one. */
2415 bpstat_alloc (struct breakpoint *b, bpstat cbs /* Current "bs" value */ )
2419 bs = (bpstat) xmalloc (sizeof (*bs));
2421 bs->breakpoint_at = b;
2422 /* If the condition is false, etc., don't do the commands. */
2423 bs->commands = NULL;
2425 bs->print_it = print_it_normal;
2429 /* Possible return values for watchpoint_check (this can't be an enum
2430 because of check_errors). */
2431 /* The watchpoint has been deleted. */
2432 #define WP_DELETED 1
2433 /* The value has changed. */
2434 #define WP_VALUE_CHANGED 2
2435 /* The value has not changed. */
2436 #define WP_VALUE_NOT_CHANGED 3
2438 #define BP_TEMPFLAG 1
2439 #define BP_HARDWAREFLAG 2
2441 /* Check watchpoint condition. */
2444 watchpoint_check (void *p)
2446 bpstat bs = (bpstat) p;
2447 struct breakpoint *b;
2448 struct frame_info *fr;
2449 int within_current_scope;
2451 struct frame_id current_frame_id;
2454 b = bs->breakpoint_at;
2456 if (b->exp_valid_block == NULL)
2457 within_current_scope = 1;
2460 /* There is no current frame at this moment. If we're going to have
2461 any chance of handling watchpoints on local variables, we'll need
2462 the frame chain (so we can determine if we're in scope). */
2463 reinit_frame_cache ();
2464 fr = frame_find_by_id (b->watchpoint_frame);
2465 within_current_scope = (fr != NULL);
2466 /* in_function_epilogue_p() returns a non-zero value if we're still
2467 in the function but the stack frame has already been invalidated.
2468 Since we can't rely on the values of local variables after the
2469 stack has been destroyed, we are treating the watchpoint in that
2470 state as `not changed' without further checking.
2472 vinschen/2003-09-04: The former implementation left out the case
2473 that the watchpoint frame couldn't be found by frame_find_by_id()
2474 because the current PC is currently in an epilogue. Calling
2475 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2476 if ((!within_current_scope || fr == get_current_frame ())
2477 && gdbarch_in_function_epilogue_p (current_gdbarch, read_pc ()))
2478 return WP_VALUE_NOT_CHANGED;
2479 if (fr && within_current_scope)
2480 /* If we end up stopping, the current frame will get selected
2481 in normal_stop. So this call to select_frame won't affect
2486 if (within_current_scope)
2488 /* We use value_{,free_to_}mark because it could be a
2489 *long* time before we return to the command level and
2490 call free_all_values. We can't call free_all_values because
2491 we might be in the middle of evaluating a function call. */
2493 struct value *mark = value_mark ();
2494 struct value *new_val = evaluate_expression (bs->breakpoint_at->exp);
2495 if (!value_equal (b->val, new_val))
2497 release_value (new_val);
2498 value_free_to_mark (mark);
2499 bs->old_val = b->val;
2501 /* We will stop here */
2502 return WP_VALUE_CHANGED;
2506 /* Nothing changed, don't do anything. */
2507 value_free_to_mark (mark);
2508 /* We won't stop here */
2509 return WP_VALUE_NOT_CHANGED;
2514 /* This seems like the only logical thing to do because
2515 if we temporarily ignored the watchpoint, then when
2516 we reenter the block in which it is valid it contains
2517 garbage (in the case of a function, it may have two
2518 garbage values, one before and one after the prologue).
2519 So we can't even detect the first assignment to it and
2520 watch after that (since the garbage may or may not equal
2521 the first value assigned). */
2522 /* We print all the stop information in print_it_typical(), but
2523 in this case, by the time we call print_it_typical() this bp
2524 will be deleted already. So we have no choice but print the
2525 information here. */
2526 if (ui_out_is_mi_like_p (uiout))
2527 ui_out_field_string (uiout, "reason", "watchpoint-scope");
2528 ui_out_text (uiout, "\nWatchpoint ");
2529 ui_out_field_int (uiout, "wpnum", bs->breakpoint_at->number);
2530 ui_out_text (uiout, " deleted because the program has left the block in\n\
2531 which its expression is valid.\n");
2533 if (b->related_breakpoint)
2534 b->related_breakpoint->disposition = disp_del_at_next_stop;
2535 b->disposition = disp_del_at_next_stop;
2541 /* Get a bpstat associated with having just stopped at address *PC
2542 and frame address CORE_ADDRESS. Update *PC to point at the
2543 breakpoint (if we hit a breakpoint). NOT_A_SW_BREAKPOINT is nonzero
2544 if this is known to not be a real breakpoint (it could still be a
2545 watchpoint, though). */
2547 /* Determine whether we stopped at a breakpoint, etc, or whether we
2548 don't understand this stop. Result is a chain of bpstat's such that:
2550 if we don't understand the stop, the result is a null pointer.
2552 if we understand why we stopped, the result is not null.
2554 Each element of the chain refers to a particular breakpoint or
2555 watchpoint at which we have stopped. (We may have stopped for
2556 several reasons concurrently.)
2558 Each element of the chain has valid next, breakpoint_at,
2559 commands, FIXME??? fields. */
2562 bpstat_stop_status (CORE_ADDR *pc, int not_a_sw_breakpoint)
2564 struct breakpoint *b, *temp;
2566 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2567 int real_breakpoint = 0;
2568 /* Root of the chain of bpstat's */
2569 struct bpstats root_bs[1];
2570 /* Pointer to the last thing in the chain currently. */
2571 bpstat bs = root_bs;
2573 /* Get the address where the breakpoint would have been. The
2574 "not_a_sw_breakpoint" argument is meant to distinguish between a
2575 breakpoint trap event and a trace/singlestep trap event. For a
2576 trace/singlestep trap event, we would not want to subtract
2577 DECR_PC_AFTER_BREAK from the PC. */
2579 bp_addr = *pc - (not_a_sw_breakpoint ? 0 : DECR_PC_AFTER_BREAK);
2581 ALL_BREAKPOINTS_SAFE (b, temp)
2583 if (b->enable_state == bp_disabled
2584 || b->enable_state == bp_shlib_disabled
2585 || b->enable_state == bp_call_disabled)
2588 if (b->type != bp_watchpoint
2589 && b->type != bp_hardware_watchpoint
2590 && b->type != bp_read_watchpoint
2591 && b->type != bp_access_watchpoint
2592 && b->type != bp_hardware_breakpoint
2593 && b->type != bp_catch_fork
2594 && b->type != bp_catch_vfork
2595 && b->type != bp_catch_exec
2596 && b->type != bp_catch_catch
2597 && b->type != bp_catch_throw) /* a non-watchpoint bp */
2599 if (b->loc->address != bp_addr) /* address doesn't match */
2601 if (overlay_debugging /* unmapped overlay section */
2602 && section_is_overlay (b->loc->section)
2603 && !section_is_mapped (b->loc->section))
2607 if (b->type == bp_hardware_breakpoint)
2609 if (b->loc->address != (*pc - DECR_PC_AFTER_HW_BREAK))
2611 if (overlay_debugging /* unmapped overlay section */
2612 && section_is_overlay (b->loc->section)
2613 && !section_is_mapped (b->loc->section))
2617 /* Is this a catchpoint of a load or unload? If so, did we
2618 get a load or unload of the specified library? If not,
2620 if ((b->type == bp_catch_load)
2621 #if defined(SOLIB_HAVE_LOAD_EVENT)
2622 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid))
2623 || ((b->dll_pathname != NULL)
2624 && (strcmp (b->dll_pathname,
2625 SOLIB_LOADED_LIBRARY_PATHNAME (
2626 PIDGET (inferior_ptid)))
2632 if ((b->type == bp_catch_unload)
2633 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2634 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid))
2635 || ((b->dll_pathname != NULL)
2636 && (strcmp (b->dll_pathname,
2637 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2638 PIDGET (inferior_ptid)))
2644 if ((b->type == bp_catch_fork)
2645 && !inferior_has_forked (PIDGET (inferior_ptid),
2646 &b->forked_inferior_pid))
2649 if ((b->type == bp_catch_vfork)
2650 && !inferior_has_vforked (PIDGET (inferior_ptid),
2651 &b->forked_inferior_pid))
2654 if ((b->type == bp_catch_exec)
2655 && !inferior_has_execd (PIDGET (inferior_ptid), &b->exec_pathname))
2658 if (ep_is_exception_catchpoint (b) &&
2659 !(current_exception_event = target_get_current_exception_event ()))
2662 /* Come here if it's a watchpoint, or if the break address matches */
2664 bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */
2666 /* Watchpoints may change this, if not found to have triggered. */
2670 if (b->type == bp_watchpoint ||
2671 b->type == bp_hardware_watchpoint)
2673 char *message = xstrprintf ("Error evaluating expression for watchpoint %d\n",
2675 struct cleanup *cleanups = make_cleanup (xfree, message);
2676 int e = catch_errors (watchpoint_check, bs, message,
2678 do_cleanups (cleanups);
2682 /* We've already printed what needs to be printed. */
2683 /* Actually this is superfluous, because by the time we
2684 call print_it_typical() the wp will be already deleted,
2685 and the function will return immediately. */
2686 bs->print_it = print_it_done;
2689 case WP_VALUE_CHANGED:
2693 case WP_VALUE_NOT_CHANGED:
2695 bs->print_it = print_it_noop;
2702 /* Error from catch_errors. */
2703 printf_filtered ("Watchpoint %d deleted.\n", b->number);
2704 if (b->related_breakpoint)
2705 b->related_breakpoint->disposition = disp_del_at_next_stop;
2706 b->disposition = disp_del_at_next_stop;
2707 /* We've already printed what needs to be printed. */
2708 bs->print_it = print_it_done;
2714 else if (b->type == bp_read_watchpoint ||
2715 b->type == bp_access_watchpoint)
2721 addr = target_stopped_data_address ();
2724 for (v = b->val_chain; v; v = v->next)
2726 if (VALUE_LVAL (v) == lval_memory
2727 && ! VALUE_LAZY (v))
2729 struct type *vtype = check_typedef (VALUE_TYPE (v));
2731 if (v == b->val_chain
2732 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
2733 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
2737 vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
2738 /* Exact match not required. Within range is
2740 if (addr >= vaddr &&
2741 addr < vaddr + TYPE_LENGTH (VALUE_TYPE (v)))
2748 char *message = xstrprintf ("Error evaluating expression for watchpoint %d\n",
2750 struct cleanup *cleanups = make_cleanup (xfree, message);
2751 int e = catch_errors (watchpoint_check, bs, message,
2753 do_cleanups (cleanups);
2757 /* We've already printed what needs to be printed. */
2758 bs->print_it = print_it_done;
2761 case WP_VALUE_CHANGED:
2762 if (b->type == bp_read_watchpoint)
2764 /* Don't stop: read watchpoints shouldn't fire if
2765 the value has changed. This is for targets
2766 which cannot set read-only watchpoints. */
2767 bs->print_it = print_it_noop;
2773 case WP_VALUE_NOT_CHANGED:
2780 /* Error from catch_errors. */
2781 printf_filtered ("Watchpoint %d deleted.\n", b->number);
2782 if (b->related_breakpoint)
2783 b->related_breakpoint->disposition = disp_del_at_next_stop;
2784 b->disposition = disp_del_at_next_stop;
2785 /* We've already printed what needs to be printed. */
2786 bs->print_it = print_it_done;
2790 else /* found == 0 */
2792 /* This is a case where some watchpoint(s) triggered,
2793 but not at the address of this watchpoint (FOUND
2794 was left zero). So don't print anything for this
2796 bs->print_it = print_it_noop;
2803 /* By definition, an encountered breakpoint is a triggered
2807 real_breakpoint = 1;
2810 if (frame_id_p (b->frame_id)
2811 && !frame_id_eq (b->frame_id, get_frame_id (get_current_frame ())))
2815 int value_is_zero = 0;
2819 /* Need to select the frame, with all that implies
2820 so that the conditions will have the right context. */
2821 select_frame (get_current_frame ());
2823 = catch_errors (breakpoint_cond_eval, (b->cond),
2824 "Error in testing breakpoint condition:\n",
2826 /* FIXME-someday, should give breakpoint # */
2829 if (b->cond && value_is_zero)
2832 /* Don't consider this a hit. */
2835 else if (b->ignore_count > 0)
2838 annotate_ignore_count_change ();
2843 /* We will stop here */
2844 if (b->disposition == disp_disable)
2845 b->enable_state = bp_disabled;
2848 bs->commands = b->commands;
2850 (STREQ ("silent", bs->commands->line) ||
2851 (xdb_commands && STREQ ("Q", bs->commands->line))))
2853 bs->commands = bs->commands->next;
2856 bs->commands = copy_command_lines (bs->commands);
2859 /* Print nothing for this entry if we dont stop or if we dont print. */
2860 if (bs->stop == 0 || bs->print == 0)
2861 bs->print_it = print_it_noop;
2864 bs->next = NULL; /* Terminate the chain */
2865 bs = root_bs->next; /* Re-grab the head of the chain */
2867 if (real_breakpoint && bs)
2869 if (bs->breakpoint_at->type == bp_hardware_breakpoint)
2871 if (DECR_PC_AFTER_HW_BREAK != 0)
2873 *pc = *pc - DECR_PC_AFTER_HW_BREAK;
2879 if (DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs)
2882 #if defined (SHIFT_INST_REGS)
2884 #else /* No SHIFT_INST_REGS. */
2886 #endif /* No SHIFT_INST_REGS. */
2891 /* The value of a hardware watchpoint hasn't changed, but the
2892 intermediate memory locations we are watching may have. */
2893 if (bs && !bs->stop &&
2894 (bs->breakpoint_at->type == bp_hardware_watchpoint ||
2895 bs->breakpoint_at->type == bp_read_watchpoint ||
2896 bs->breakpoint_at->type == bp_access_watchpoint))
2898 remove_breakpoints ();
2899 insert_breakpoints ();
2904 /* Tell what to do about this bpstat. */
2906 bpstat_what (bpstat bs)
2908 /* Classify each bpstat as one of the following. */
2911 /* This bpstat element has no effect on the main_action. */
2914 /* There was a watchpoint, stop but don't print. */
2917 /* There was a watchpoint, stop and print. */
2920 /* There was a breakpoint but we're not stopping. */
2923 /* There was a breakpoint, stop but don't print. */
2926 /* There was a breakpoint, stop and print. */
2929 /* We hit the longjmp breakpoint. */
2932 /* We hit the longjmp_resume breakpoint. */
2935 /* We hit the step_resume breakpoint. */
2938 /* We hit the through_sigtramp breakpoint. */
2941 /* We hit the shared library event breakpoint. */
2944 /* We caught a shared library event. */
2947 /* This is just used to count how many enums there are. */
2951 /* Here is the table which drives this routine. So that we can
2952 format it pretty, we define some abbreviations for the
2953 enum bpstat_what codes. */
2954 #define kc BPSTAT_WHAT_KEEP_CHECKING
2955 #define ss BPSTAT_WHAT_STOP_SILENT
2956 #define sn BPSTAT_WHAT_STOP_NOISY
2957 #define sgl BPSTAT_WHAT_SINGLE
2958 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2959 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2960 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2961 #define sr BPSTAT_WHAT_STEP_RESUME
2962 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2963 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2964 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2966 /* "Can't happen." Might want to print an error message.
2967 abort() is not out of the question, but chances are GDB is just
2968 a bit confused, not unusable. */
2969 #define err BPSTAT_WHAT_STOP_NOISY
2971 /* Given an old action and a class, come up with a new action. */
2972 /* One interesting property of this table is that wp_silent is the same
2973 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2974 after stopping, the check for whether to step over a breakpoint
2975 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2976 reference to how we stopped. We retain separate wp_silent and
2977 bp_silent codes in case we want to change that someday.
2979 Another possibly interesting property of this table is that
2980 there's a partial ordering, priority-like, of the actions. Once
2981 you've decided that some action is appropriate, you'll never go
2982 back and decide something of a lower priority is better. The
2985 kc < clr sgl shl shlr slr sn sr ss ts
2986 sgl < clrs shl shlr slr sn sr ss ts
2987 slr < err shl shlr sn sr ss ts
2988 clr < clrs err shl shlr sn sr ss ts
2989 clrs < err shl shlr sn sr ss ts
2990 ss < shl shlr sn sr ts
2997 What I think this means is that we don't need a damned table
2998 here. If you just put the rows and columns in the right order,
2999 it'd look awfully regular. We could simply walk the bpstat list
3000 and choose the highest priority action we find, with a little
3001 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
3002 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
3003 is messy anyway). */
3005 /* step_resume entries: a step resume breakpoint overrides another
3006 breakpoint of signal handling (see comment in wait_for_inferior
3007 at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
3008 /* We handle the through_sigtramp_breakpoint the same way; having both
3009 one of those and a step_resume_breakpoint is probably very rare (?). */
3011 static const enum bpstat_what_main_action
3012 table[(int) class_last][(int) BPSTAT_WHAT_LAST] =
3015 /* kc ss sn sgl slr clr clrs sr ts shl shlr
3018 {kc, ss, sn, sgl, slr, clr, clrs, sr, ts, shl, shlr},
3020 {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
3022 {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
3024 {sgl, ss, sn, sgl, slr, clrs, clrs, sr, ts, shl, shlr},
3026 {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
3028 {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
3030 {slr, ss, sn, slr, slr, err, err, sr, ts, shl, shlr},
3032 {clr, ss, sn, clrs, err, err, err, sr, ts, shl, shlr},
3034 {sr, sr, sr, sr, sr, sr, sr, sr, ts, shl, shlr},
3036 {ts, ts, ts, ts, ts, ts, ts, ts, ts, shl, shlr},
3038 {shl, shl, shl, shl, shl, shl, shl, shl, ts, shl, shlr},
3040 {shlr, shlr, shlr, shlr, shlr, shlr, shlr, shlr, ts, shlr, shlr}
3055 enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
3056 struct bpstat_what retval;
3058 retval.call_dummy = 0;
3059 for (; bs != NULL; bs = bs->next)
3061 enum class bs_class = no_effect;
3062 if (bs->breakpoint_at == NULL)
3063 /* I suspect this can happen if it was a momentary breakpoint
3064 which has since been deleted. */
3066 switch (bs->breakpoint_at->type)
3072 case bp_hardware_breakpoint:
3078 bs_class = bp_noisy;
3080 bs_class = bp_silent;
3083 bs_class = bp_nostop;
3086 case bp_hardware_watchpoint:
3087 case bp_read_watchpoint:
3088 case bp_access_watchpoint:
3092 bs_class = wp_noisy;
3094 bs_class = wp_silent;
3097 /* There was a watchpoint, but we're not stopping.
3098 This requires no further action. */
3099 bs_class = no_effect;
3102 bs_class = long_jump;
3104 case bp_longjmp_resume:
3105 bs_class = long_resume;
3107 case bp_step_resume:
3110 bs_class = step_resume;
3113 /* It is for the wrong frame. */
3114 bs_class = bp_nostop;
3116 case bp_through_sigtramp:
3117 bs_class = through_sig;
3119 case bp_watchpoint_scope:
3120 bs_class = bp_nostop;
3122 case bp_shlib_event:
3123 bs_class = shlib_event;
3125 case bp_thread_event:
3126 case bp_overlay_event:
3127 bs_class = bp_nostop;
3130 case bp_catch_unload:
3131 /* Only if this catchpoint triggered should we cause the
3132 step-out-of-dld behaviour. Otherwise, we ignore this
3135 bs_class = catch_shlib_event;
3137 bs_class = no_effect;
3140 case bp_catch_vfork:
3145 bs_class = bp_noisy;
3147 bs_class = bp_silent;
3150 /* There was a catchpoint, but we're not stopping.
3151 This requires no further action. */
3152 bs_class = no_effect;
3154 case bp_catch_catch:
3155 if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_CATCH)
3156 bs_class = bp_nostop;
3158 bs_class = bs->print ? bp_noisy : bp_silent;
3160 case bp_catch_throw:
3161 if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_THROW)
3162 bs_class = bp_nostop;
3164 bs_class = bs->print ? bp_noisy : bp_silent;
3167 /* Make sure the action is stop (silent or noisy),
3168 so infrun.c pops the dummy frame. */
3169 bs_class = bp_silent;
3170 retval.call_dummy = 1;
3173 current_action = table[(int) bs_class][(int) current_action];
3175 retval.main_action = current_action;
3179 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3180 without hardware support). This isn't related to a specific bpstat,
3181 just to things like whether watchpoints are set. */
3184 bpstat_should_step (void)
3186 struct breakpoint *b;
3188 if (b->enable_state == bp_enabled && b->type == bp_watchpoint)
3193 /* Nonzero if there are enabled hardware watchpoints. */
3195 bpstat_have_active_hw_watchpoints (void)
3197 struct bp_location *bpt;
3198 ALL_BP_LOCATIONS (bpt)
3199 if ((bpt->owner->enable_state == bp_enabled)
3201 && bpt->loc_type == bp_loc_hardware_watchpoint)
3207 /* Given a bpstat that records zero or more triggered eventpoints, this
3208 function returns another bpstat which contains only the catchpoints
3209 on that first list, if any. */
3211 bpstat_get_triggered_catchpoints (bpstat ep_list, bpstat *cp_list)
3213 struct bpstats root_bs[1];
3214 bpstat bs = root_bs;
3215 struct breakpoint *ep;
3218 bpstat_clear (cp_list);
3219 root_bs->next = NULL;
3221 for (; ep_list != NULL; ep_list = ep_list->next)
3223 /* Is this eventpoint a catchpoint? If not, ignore it. */
3224 ep = ep_list->breakpoint_at;
3227 if ((ep->type != bp_catch_load) &&
3228 (ep->type != bp_catch_unload) &&
3229 (ep->type != bp_catch_catch) &&
3230 (ep->type != bp_catch_throw))
3231 /* pai: (temp) ADD fork/vfork here!! */
3234 /* Yes; add it to the list. */
3235 bs = bpstat_alloc (ep, bs);
3240 #if defined(SOLIB_ADD)
3241 /* Also, for each triggered catchpoint, tag it with the name of
3242 the library that caused this trigger. (We copy the name now,
3243 because it's only guaranteed to be available NOW, when the
3244 catchpoint triggers. Clients who may wish to know the name
3245 later must get it from the catchpoint itself.) */
3246 if (ep->triggered_dll_pathname != NULL)
3247 xfree (ep->triggered_dll_pathname);
3248 if (ep->type == bp_catch_load)
3249 dll_pathname = SOLIB_LOADED_LIBRARY_PATHNAME (
3250 PIDGET (inferior_ptid));
3252 dll_pathname = SOLIB_UNLOADED_LIBRARY_PATHNAME (
3253 PIDGET (inferior_ptid));
3255 dll_pathname = NULL;
3259 ep->triggered_dll_pathname = (char *)
3260 xmalloc (strlen (dll_pathname) + 1);
3261 strcpy (ep->triggered_dll_pathname, dll_pathname);
3264 ep->triggered_dll_pathname = NULL;
3270 /* Print B to gdb_stdout. */
3272 print_one_breakpoint (struct breakpoint *b,
3273 CORE_ADDR *last_addr)
3275 struct command_line *l;
3277 struct ep_type_description
3282 static struct ep_type_description bptypes[] =
3284 {bp_none, "?deleted?"},
3285 {bp_breakpoint, "breakpoint"},
3286 {bp_hardware_breakpoint, "hw breakpoint"},
3287 {bp_until, "until"},
3288 {bp_finish, "finish"},
3289 {bp_watchpoint, "watchpoint"},
3290 {bp_hardware_watchpoint, "hw watchpoint"},
3291 {bp_read_watchpoint, "read watchpoint"},
3292 {bp_access_watchpoint, "acc watchpoint"},
3293 {bp_longjmp, "longjmp"},
3294 {bp_longjmp_resume, "longjmp resume"},
3295 {bp_step_resume, "step resume"},
3296 {bp_through_sigtramp, "sigtramp"},
3297 {bp_watchpoint_scope, "watchpoint scope"},
3298 {bp_call_dummy, "call dummy"},
3299 {bp_shlib_event, "shlib events"},
3300 {bp_thread_event, "thread events"},
3301 {bp_overlay_event, "overlay events"},
3302 {bp_catch_load, "catch load"},
3303 {bp_catch_unload, "catch unload"},
3304 {bp_catch_fork, "catch fork"},
3305 {bp_catch_vfork, "catch vfork"},
3306 {bp_catch_exec, "catch exec"},
3307 {bp_catch_catch, "catch catch"},
3308 {bp_catch_throw, "catch throw"}
3311 static char *bpdisps[] =
3312 {"del", "dstp", "dis", "keep"};
3313 static char bpenables[] = "nynny";
3314 char wrap_indent[80];
3315 struct ui_stream *stb = ui_out_stream_new (uiout);
3316 struct cleanup *old_chain = make_cleanup_ui_out_stream_delete (stb);
3317 struct cleanup *bkpt_chain;
3320 bkpt_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "bkpt");
3324 ui_out_field_int (uiout, "number", b->number);
3328 if (((int) b->type > (sizeof (bptypes) / sizeof (bptypes[0])))
3329 || ((int) b->type != bptypes[(int) b->type].type))
3330 internal_error (__FILE__, __LINE__,
3331 "bptypes table does not describe type #%d.",
3333 ui_out_field_string (uiout, "type", bptypes[(int) b->type].description);
3337 ui_out_field_string (uiout, "disp", bpdisps[(int) b->disposition]);
3341 ui_out_field_fmt (uiout, "enabled", "%c", bpenables[(int) b->enable_state]);
3342 ui_out_spaces (uiout, 2);
3345 strcpy (wrap_indent, " ");
3348 if (TARGET_ADDR_BIT <= 32)
3349 strcat (wrap_indent, " ");
3351 strcat (wrap_indent, " ");
3354 if (b->ops != NULL && b->ops->print_one != NULL)
3355 b->ops->print_one (b, last_addr);
3360 internal_error (__FILE__, __LINE__,
3361 "print_one_breakpoint: bp_none encountered\n");
3365 case bp_hardware_watchpoint:
3366 case bp_read_watchpoint:
3367 case bp_access_watchpoint:
3368 /* Field 4, the address, is omitted (which makes the columns
3369 not line up too nicely with the headers, but the effect
3370 is relatively readable). */
3372 ui_out_field_skip (uiout, "addr");
3374 print_expression (b->exp, stb->stream);
3375 ui_out_field_stream (uiout, "what", stb);
3379 case bp_catch_unload:
3380 /* Field 4, the address, is omitted (which makes the columns
3381 not line up too nicely with the headers, but the effect
3382 is relatively readable). */
3384 ui_out_field_skip (uiout, "addr");
3386 if (b->dll_pathname == NULL)
3388 ui_out_field_string (uiout, "what", "<any library>");
3389 ui_out_spaces (uiout, 1);
3393 ui_out_text (uiout, "library \"");
3394 ui_out_field_string (uiout, "what", b->dll_pathname);
3395 ui_out_text (uiout, "\" ");
3400 case bp_catch_vfork:
3401 /* Field 4, the address, is omitted (which makes the columns
3402 not line up too nicely with the headers, but the effect
3403 is relatively readable). */
3405 ui_out_field_skip (uiout, "addr");
3407 if (b->forked_inferior_pid != 0)
3409 ui_out_text (uiout, "process ");
3410 ui_out_field_int (uiout, "what", b->forked_inferior_pid);
3411 ui_out_spaces (uiout, 1);
3415 /* Field 4, the address, is omitted (which makes the columns
3416 not line up too nicely with the headers, but the effect
3417 is relatively readable). */
3419 ui_out_field_skip (uiout, "addr");
3421 if (b->exec_pathname != NULL)
3423 ui_out_text (uiout, "program \"");
3424 ui_out_field_string (uiout, "what", b->exec_pathname);
3425 ui_out_text (uiout, "\" ");
3429 case bp_catch_catch:
3430 /* Field 4, the address, is omitted (which makes the columns
3431 not line up too nicely with the headers, but the effect
3432 is relatively readable). */
3434 ui_out_field_skip (uiout, "addr");
3436 ui_out_field_string (uiout, "what", "exception catch");
3437 ui_out_spaces (uiout, 1);
3440 case bp_catch_throw:
3441 /* Field 4, the address, is omitted (which makes the columns
3442 not line up too nicely with the headers, but the effect
3443 is relatively readable). */
3445 ui_out_field_skip (uiout, "addr");
3447 ui_out_field_string (uiout, "what", "exception throw");
3448 ui_out_spaces (uiout, 1);
3452 case bp_hardware_breakpoint:
3456 case bp_longjmp_resume:
3457 case bp_step_resume:
3458 case bp_through_sigtramp:
3459 case bp_watchpoint_scope:
3461 case bp_shlib_event:
3462 case bp_thread_event:
3463 case bp_overlay_event:
3467 ui_out_field_core_addr (uiout, "addr", b->loc->address);
3470 *last_addr = b->loc->address;
3473 sym = find_pc_sect_function (b->loc->address, b->loc->section);
3476 ui_out_text (uiout, "in ");
3477 ui_out_field_string (uiout, "func",
3478 SYMBOL_PRINT_NAME (sym));
3479 ui_out_wrap_hint (uiout, wrap_indent);
3480 ui_out_text (uiout, " at ");
3482 ui_out_field_string (uiout, "file", b->source_file);
3483 ui_out_text (uiout, ":");
3484 ui_out_field_int (uiout, "line", b->line_number);
3488 print_address_symbolic (b->loc->address, stb->stream, demangle, "");
3489 ui_out_field_stream (uiout, "at", stb);
3494 if (b->thread != -1)
3496 /* FIXME: This seems to be redundant and lost here; see the
3497 "stop only in" line a little further down. */
3498 ui_out_text (uiout, " thread ");
3499 ui_out_field_int (uiout, "thread", b->thread);
3502 ui_out_text (uiout, "\n");
3504 if (frame_id_p (b->frame_id))
3507 ui_out_text (uiout, "\tstop only in stack frame at ");
3508 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3510 ui_out_field_core_addr (uiout, "frame", b->frame_id.stack_addr);
3511 ui_out_text (uiout, "\n");
3517 ui_out_text (uiout, "\tstop only if ");
3518 print_expression (b->cond, stb->stream);
3519 ui_out_field_stream (uiout, "cond", stb);
3520 ui_out_text (uiout, "\n");
3523 if (b->thread != -1)
3525 /* FIXME should make an annotation for this */
3526 ui_out_text (uiout, "\tstop only in thread ");
3527 ui_out_field_int (uiout, "thread", b->thread);
3528 ui_out_text (uiout, "\n");
3531 if (show_breakpoint_hit_counts && b->hit_count)
3533 /* FIXME should make an annotation for this */
3534 if (ep_is_catchpoint (b))
3535 ui_out_text (uiout, "\tcatchpoint");
3537 ui_out_text (uiout, "\tbreakpoint");
3538 ui_out_text (uiout, " already hit ");
3539 ui_out_field_int (uiout, "times", b->hit_count);
3540 if (b->hit_count == 1)
3541 ui_out_text (uiout, " time\n");
3543 ui_out_text (uiout, " times\n");
3546 /* Output the count also if it is zero, but only if this is
3547 mi. FIXME: Should have a better test for this. */
3548 if (ui_out_is_mi_like_p (uiout))
3549 if (show_breakpoint_hit_counts && b->hit_count == 0)
3550 ui_out_field_int (uiout, "times", b->hit_count);
3552 if (b->ignore_count)
3555 ui_out_text (uiout, "\tignore next ");
3556 ui_out_field_int (uiout, "ignore", b->ignore_count);
3557 ui_out_text (uiout, " hits\n");
3560 if ((l = b->commands))
3562 struct cleanup *script_chain;
3565 script_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "script");
3566 print_command_lines (uiout, l, 4);
3567 do_cleanups (script_chain);
3569 do_cleanups (bkpt_chain);
3570 do_cleanups (old_chain);
3573 struct captured_breakpoint_query_args
3579 do_captured_breakpoint_query (struct ui_out *uiout, void *data)
3581 struct captured_breakpoint_query_args *args = data;
3582 struct breakpoint *b;
3583 CORE_ADDR dummy_addr = 0;
3586 if (args->bnum == b->number)
3588 print_one_breakpoint (b, &dummy_addr);
3596 gdb_breakpoint_query (struct ui_out *uiout, int bnum)
3598 struct captured_breakpoint_query_args args;
3600 /* For the moment we don't trust print_one_breakpoint() to not throw
3602 return catch_exceptions (uiout, do_captured_breakpoint_query, &args,
3603 NULL, RETURN_MASK_ALL);
3606 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3607 catchpoints, et.al.). */
3610 user_settable_breakpoint (const struct breakpoint *b)
3612 return (b->type == bp_breakpoint
3613 || b->type == bp_catch_load
3614 || b->type == bp_catch_unload
3615 || b->type == bp_catch_fork
3616 || b->type == bp_catch_vfork
3617 || b->type == bp_catch_exec
3618 || b->type == bp_catch_catch
3619 || b->type == bp_catch_throw
3620 || b->type == bp_hardware_breakpoint
3621 || b->type == bp_watchpoint
3622 || b->type == bp_read_watchpoint
3623 || b->type == bp_access_watchpoint
3624 || b->type == bp_hardware_watchpoint);
3627 /* Print information on user settable breakpoint (watchpoint, etc)
3628 number BNUM. If BNUM is -1 print all user settable breakpoints.
3629 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3632 breakpoint_1 (int bnum, int allflag)
3634 struct breakpoint *b;
3635 CORE_ADDR last_addr = (CORE_ADDR) -1;
3636 int nr_printable_breakpoints;
3637 struct cleanup *bkpttbl_chain;
3639 /* Compute the number of rows in the table. */
3640 nr_printable_breakpoints = 0;
3643 || bnum == b->number)
3645 if (allflag || user_settable_breakpoint (b))
3646 nr_printable_breakpoints++;
3651 = make_cleanup_ui_out_table_begin_end (uiout, 6, nr_printable_breakpoints,
3655 = make_cleanup_ui_out_table_begin_end (uiout, 5, nr_printable_breakpoints,
3658 if (nr_printable_breakpoints > 0)
3659 annotate_breakpoints_headers ();
3660 if (nr_printable_breakpoints > 0)
3662 ui_out_table_header (uiout, 3, ui_left, "number", "Num"); /* 1 */
3663 if (nr_printable_breakpoints > 0)
3665 ui_out_table_header (uiout, 14, ui_left, "type", "Type"); /* 2 */
3666 if (nr_printable_breakpoints > 0)
3668 ui_out_table_header (uiout, 4, ui_left, "disp", "Disp"); /* 3 */
3669 if (nr_printable_breakpoints > 0)
3671 ui_out_table_header (uiout, 3, ui_left, "enabled", "Enb"); /* 4 */
3674 if (nr_printable_breakpoints > 0)
3676 if (TARGET_ADDR_BIT <= 32)
3677 ui_out_table_header (uiout, 10, ui_left, "addr", "Address");/* 5 */
3679 ui_out_table_header (uiout, 18, ui_left, "addr", "Address");/* 5 */
3681 if (nr_printable_breakpoints > 0)
3683 ui_out_table_header (uiout, 40, ui_noalign, "what", "What"); /* 6 */
3684 ui_out_table_body (uiout);
3685 if (nr_printable_breakpoints > 0)
3686 annotate_breakpoints_table ();
3690 || bnum == b->number)
3692 /* We only print out user settable breakpoints unless the
3694 if (allflag || user_settable_breakpoint (b))
3695 print_one_breakpoint (b, &last_addr);
3698 do_cleanups (bkpttbl_chain);
3700 if (nr_printable_breakpoints == 0)
3703 ui_out_message (uiout, 0, "No breakpoints or watchpoints.\n");
3705 ui_out_message (uiout, 0, "No breakpoint or watchpoint number %d.\n",
3710 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3711 that a comparison of an unsigned with -1 is always false. */
3712 if (last_addr != (CORE_ADDR) -1)
3713 set_next_address (last_addr);
3716 /* FIXME? Should this be moved up so that it is only called when
3717 there have been breakpoints? */
3718 annotate_breakpoints_table_end ();
3722 breakpoints_info (char *bnum_exp, int from_tty)
3727 bnum = parse_and_eval_long (bnum_exp);
3729 breakpoint_1 (bnum, 0);
3733 maintenance_info_breakpoints (char *bnum_exp, int from_tty)
3738 bnum = parse_and_eval_long (bnum_exp);
3740 breakpoint_1 (bnum, 1);
3743 /* Print a message describing any breakpoints set at PC. */
3746 describe_other_breakpoints (CORE_ADDR pc, asection *section)
3749 struct breakpoint *b;
3752 if (b->loc->address == pc) /* address match / overlay match */
3753 if (!overlay_debugging || b->loc->section == section)
3757 printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : "");
3759 if (b->loc->address == pc) /* address match / overlay match */
3760 if (!overlay_debugging || b->loc->section == section)
3763 printf_filtered ("%d%s%s ",
3765 ((b->enable_state == bp_disabled ||
3766 b->enable_state == bp_shlib_disabled ||
3767 b->enable_state == bp_call_disabled)
3769 : b->enable_state == bp_permanent
3773 : ((others == 1) ? " and" : ""));
3775 printf_filtered ("also set at pc ");
3776 print_address_numeric (pc, 1, gdb_stdout);
3777 printf_filtered (".\n");
3781 /* Set the default place to put a breakpoint
3782 for the `break' command with no arguments. */
3785 set_default_breakpoint (int valid, CORE_ADDR addr, struct symtab *symtab,
3788 default_breakpoint_valid = valid;
3789 default_breakpoint_address = addr;
3790 default_breakpoint_symtab = symtab;
3791 default_breakpoint_line = line;
3794 /* Return true iff it is meaningful to use the address member of
3795 BPT. For some breakpoint types, the address member is irrelevant
3796 and it makes no sense to attempt to compare it to other addresses
3797 (or use it for any other purpose either).
3799 More specifically, each of the following breakpoint types will always
3800 have a zero valued address and we don't want check_duplicates() to mark
3801 breakpoints of any of these types to be a duplicate of an actual
3802 breakpoint at address zero:
3805 bp_hardware_watchpoint
3807 bp_access_watchpoint
3814 breakpoint_address_is_meaningful (struct breakpoint *bpt)
3816 enum bptype type = bpt->type;
3818 return (type != bp_watchpoint
3819 && type != bp_hardware_watchpoint
3820 && type != bp_read_watchpoint
3821 && type != bp_access_watchpoint
3822 && type != bp_catch_exec
3823 && type != bp_longjmp_resume
3824 && type != bp_catch_fork
3825 && type != bp_catch_vfork);
3828 /* Rescan breakpoints at the same address and section as BPT,
3829 marking the first one as "first" and any others as "duplicates".
3830 This is so that the bpt instruction is only inserted once.
3831 If we have a permanent breakpoint at the same place as BPT, make
3832 that one the official one, and the rest as duplicates. */
3835 check_duplicates (struct breakpoint *bpt)
3837 struct bp_location *b;
3839 struct bp_location *perm_bp = 0;
3840 CORE_ADDR address = bpt->loc->address;
3841 asection *section = bpt->loc->section;
3843 if (! breakpoint_address_is_meaningful (bpt))
3846 ALL_BP_LOCATIONS (b)
3847 if (b->owner->enable_state != bp_disabled
3848 && b->owner->enable_state != bp_shlib_disabled
3849 && b->owner->enable_state != bp_call_disabled
3850 && b->address == address /* address / overlay match */
3851 && (!overlay_debugging || b->section == section)
3852 && breakpoint_address_is_meaningful (b->owner))
3854 /* Have we found a permanent breakpoint? */
3855 if (b->owner->enable_state == bp_permanent)
3862 b->duplicate = count > 1;
3865 /* If we found a permanent breakpoint at this address, go over the
3866 list again and declare all the other breakpoints there to be the
3870 perm_bp->duplicate = 0;
3872 /* Permanent breakpoint should always be inserted. */
3873 if (! perm_bp->inserted)
3874 internal_error (__FILE__, __LINE__,
3875 "allegedly permanent breakpoint is not "
3876 "actually inserted");
3878 ALL_BP_LOCATIONS (b)
3881 if (b->owner->enable_state != bp_disabled
3882 && b->owner->enable_state != bp_shlib_disabled
3883 && b->owner->enable_state != bp_call_disabled
3884 && b->address == address /* address / overlay match */
3885 && (!overlay_debugging || b->section == section)
3886 && breakpoint_address_is_meaningful (b->owner))
3889 internal_error (__FILE__, __LINE__,
3890 "another breakpoint was inserted on top of "
3891 "a permanent breakpoint");
3900 breakpoint_adjustment_warning (CORE_ADDR from_addr, CORE_ADDR to_addr,
3901 int bnum, int have_bnum)
3906 strcpy (astr1, local_hex_string_custom ((unsigned long) from_addr, "08l"));
3907 strcpy (astr2, local_hex_string_custom ((unsigned long) to_addr, "08l"));
3909 warning ("Breakpoint %d address previously adjusted from %s to %s.",
3910 bnum, astr1, astr2);
3912 warning ("Breakpoint address adjusted from %s to %s.", astr1, astr2);
3915 /* Adjust a breakpoint's address to account for architectural constraints
3916 on breakpoint placement. Return the adjusted address. Note: Very
3917 few targets require this kind of adjustment. For most targets,
3918 this function is simply the identity function. */
3921 adjust_breakpoint_address (CORE_ADDR bpaddr)
3923 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch))
3925 /* Very few targets need any kind of breakpoint adjustment. */
3930 CORE_ADDR adjusted_bpaddr;
3932 /* Some targets have architectural constraints on the placement
3933 of breakpoint instructions. Obtain the adjusted address. */
3934 adjusted_bpaddr = gdbarch_adjust_breakpoint_address (current_gdbarch,
3937 /* An adjusted breakpoint address can significantly alter
3938 a user's expectations. Print a warning if an adjustment
3940 if (adjusted_bpaddr != bpaddr)
3941 breakpoint_adjustment_warning (bpaddr, adjusted_bpaddr, 0, 0);
3943 return adjusted_bpaddr;
3947 /* Allocate a struct bp_location. */
3949 struct bp_location *
3950 allocate_bp_location (struct breakpoint *bpt, enum bptype bp_type)
3952 struct bp_location *loc, *loc_p;
3954 loc = xmalloc (sizeof (struct bp_location));
3955 memset (loc, 0, sizeof (*loc));
3965 case bp_longjmp_resume:
3966 case bp_step_resume:
3967 case bp_through_sigtramp:
3968 case bp_watchpoint_scope:
3970 case bp_shlib_event:
3971 case bp_thread_event:
3972 case bp_overlay_event:
3974 case bp_catch_unload:
3975 loc->loc_type = bp_loc_software_breakpoint;
3977 case bp_hardware_breakpoint:
3978 loc->loc_type = bp_loc_hardware_breakpoint;
3980 case bp_hardware_watchpoint:
3981 case bp_read_watchpoint:
3982 case bp_access_watchpoint:
3983 loc->loc_type = bp_loc_hardware_watchpoint;
3987 case bp_catch_vfork:
3989 case bp_catch_catch:
3990 case bp_catch_throw:
3991 loc->loc_type = bp_loc_other;
3994 internal_error (__FILE__, __LINE__, "unknown breakpoint type");
3997 /* Add this breakpoint to the end of the chain. */
3999 loc_p = bp_location_chain;
4001 bp_location_chain = loc;
4005 loc_p = loc_p->next;
4012 /* set_raw_breakpoint() is a low level routine for allocating and
4013 partially initializing a breakpoint of type BPTYPE. The newly
4014 created breakpoint's address, section, source file name, and line
4015 number are provided by SAL. The newly created and partially
4016 initialized breakpoint is added to the breakpoint chain and
4017 is also returned as the value of this function.
4019 It is expected that the caller will complete the initialization of
4020 the newly created breakpoint struct as well as output any status
4021 information regarding the creation of a new breakpoint. In
4022 particular, set_raw_breakpoint() does NOT set the breakpoint
4023 number! Care should be taken to not allow an error() to occur
4024 prior to completing the initialization of the breakpoint. If this
4025 should happen, a bogus breakpoint will be left on the chain. */
4028 set_raw_breakpoint (struct symtab_and_line sal, enum bptype bptype)
4030 struct breakpoint *b, *b1;
4032 b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint));
4033 memset (b, 0, sizeof (*b));
4034 b->loc = allocate_bp_location (b, bptype);
4035 b->loc->requested_address = sal.pc;
4036 b->loc->address = adjust_breakpoint_address (b->loc->requested_address);
4037 if (sal.symtab == NULL)
4038 b->source_file = NULL;
4040 b->source_file = savestring (sal.symtab->filename,
4041 strlen (sal.symtab->filename));
4042 b->loc->section = sal.section;
4044 b->language = current_language->la_language;
4045 b->input_radix = input_radix;
4047 b->line_number = sal.line;
4048 b->enable_state = bp_enabled;
4051 b->ignore_count = 0;
4053 b->frame_id = null_frame_id;
4054 b->dll_pathname = NULL;
4055 b->triggered_dll_pathname = NULL;
4056 b->forked_inferior_pid = 0;
4057 b->exec_pathname = NULL;
4060 /* Add this breakpoint to the end of the chain
4061 so that a list of breakpoints will come out in order
4062 of increasing numbers. */
4064 b1 = breakpoint_chain;
4066 breakpoint_chain = b;
4074 check_duplicates (b);
4075 breakpoints_changed ();
4081 /* Note that the breakpoint object B describes a permanent breakpoint
4082 instruction, hard-wired into the inferior's code. */
4084 make_breakpoint_permanent (struct breakpoint *b)
4086 b->enable_state = bp_permanent;
4088 /* By definition, permanent breakpoints are already present in the code. */
4089 b->loc->inserted = 1;
4092 static struct breakpoint *
4093 create_internal_breakpoint (CORE_ADDR address, enum bptype type)
4095 static int internal_breakpoint_number = -1;
4096 struct symtab_and_line sal;
4097 struct breakpoint *b;
4099 init_sal (&sal); /* initialize to zeroes */
4102 sal.section = find_pc_overlay (sal.pc);
4104 b = set_raw_breakpoint (sal, type);
4105 b->number = internal_breakpoint_number--;
4106 b->disposition = disp_donttouch;
4113 create_longjmp_breakpoint (char *func_name)
4115 struct breakpoint *b;
4116 struct minimal_symbol *m;
4118 if (func_name == NULL)
4119 b = create_internal_breakpoint (0, bp_longjmp_resume);
4122 if ((m = lookup_minimal_symbol_text (func_name, NULL)) == NULL)
4125 b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m), bp_longjmp);
4128 b->enable_state = bp_disabled;
4131 b->addr_string = xstrdup (func_name);
4134 /* Call this routine when stepping and nexting to enable a breakpoint
4135 if we do a longjmp(). When we hit that breakpoint, call
4136 set_longjmp_resume_breakpoint() to figure out where we are going. */
4139 enable_longjmp_breakpoint (void)
4141 struct breakpoint *b;
4144 if (b->type == bp_longjmp)
4146 b->enable_state = bp_enabled;
4147 check_duplicates (b);
4152 disable_longjmp_breakpoint (void)
4154 struct breakpoint *b;
4157 if (b->type == bp_longjmp
4158 || b->type == bp_longjmp_resume)
4160 b->enable_state = bp_disabled;
4161 check_duplicates (b);
4166 create_overlay_event_breakpoint (char *func_name)
4168 struct breakpoint *b;
4169 struct minimal_symbol *m;
4171 if ((m = lookup_minimal_symbol_text (func_name, NULL)) == NULL)
4174 b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m),
4176 b->addr_string = xstrdup (func_name);
4178 if (overlay_debugging == ovly_auto)
4180 b->enable_state = bp_enabled;
4181 overlay_events_enabled = 1;
4185 b->enable_state = bp_disabled;
4186 overlay_events_enabled = 0;
4191 enable_overlay_breakpoints (void)
4193 struct breakpoint *b;
4196 if (b->type == bp_overlay_event)
4198 b->enable_state = bp_enabled;
4199 check_duplicates (b);
4200 overlay_events_enabled = 1;
4205 disable_overlay_breakpoints (void)
4207 struct breakpoint *b;
4210 if (b->type == bp_overlay_event)
4212 b->enable_state = bp_disabled;
4213 check_duplicates (b);
4214 overlay_events_enabled = 0;
4219 create_thread_event_breakpoint (CORE_ADDR address)
4221 struct breakpoint *b;
4223 b = create_internal_breakpoint (address, bp_thread_event);
4225 b->enable_state = bp_enabled;
4226 /* addr_string has to be used or breakpoint_re_set will delete me. */
4227 xasprintf (&b->addr_string, "*0x%s", paddr (b->loc->address));
4233 remove_thread_event_breakpoints (void)
4235 struct breakpoint *b, *temp;
4237 ALL_BREAKPOINTS_SAFE (b, temp)
4238 if (b->type == bp_thread_event)
4239 delete_breakpoint (b);
4244 remove_solib_event_breakpoints (void)
4246 struct breakpoint *b, *temp;
4248 ALL_BREAKPOINTS_SAFE (b, temp)
4249 if (b->type == bp_shlib_event)
4250 delete_breakpoint (b);
4254 create_solib_event_breakpoint (CORE_ADDR address)
4256 struct breakpoint *b;
4258 b = create_internal_breakpoint (address, bp_shlib_event);
4262 /* Disable any breakpoints that are on code in shared libraries. Only
4263 apply to enabled breakpoints, disabled ones can just stay disabled. */
4266 disable_breakpoints_in_shlibs (int silent)
4268 struct breakpoint *b;
4269 int disabled_shlib_breaks = 0;
4271 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4274 #if defined (PC_SOLIB)
4275 if (((b->type == bp_breakpoint) ||
4276 (b->type == bp_hardware_breakpoint)) &&
4277 b->enable_state == bp_enabled &&
4278 !b->loc->duplicate &&
4279 PC_SOLIB (b->loc->address))
4281 b->enable_state = bp_shlib_disabled;
4284 if (!disabled_shlib_breaks)
4286 target_terminal_ours_for_output ();
4287 warning ("Temporarily disabling shared library breakpoints:");
4289 disabled_shlib_breaks = 1;
4290 warning ("breakpoint #%d ", b->number);
4297 /* Try to reenable any breakpoints in shared libraries. */
4299 re_enable_breakpoints_in_shlibs (void)
4301 struct breakpoint *b;
4304 if (b->enable_state == bp_shlib_disabled)
4308 /* Do not reenable the breakpoint if the shared library
4309 is still not mapped in. */
4310 if (target_read_memory (b->loc->address, buf, 1) == 0)
4311 b->enable_state = bp_enabled;
4318 solib_load_unload_1 (char *hookname, int tempflag, char *dll_pathname,
4319 char *cond_string, enum bptype bp_kind)
4321 struct breakpoint *b;
4322 struct symtabs_and_lines sals;
4323 struct cleanup *old_chain;
4324 struct cleanup *canonical_strings_chain = NULL;
4325 char *addr_start = hookname;
4326 char *addr_end = NULL;
4327 char **canonical = (char **) NULL;
4328 int thread = -1; /* All threads. */
4330 /* Set a breakpoint on the specified hook. */
4331 sals = decode_line_1 (&hookname, 1, (struct symtab *) NULL, 0, &canonical);
4332 addr_end = hookname;
4334 if (sals.nelts == 0)
4336 warning ("Unable to set a breakpoint on dynamic linker callback.");
4337 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4338 warning ("GDB will be unable to track shl_load/shl_unload calls");
4341 if (sals.nelts != 1)
4343 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4344 warning ("GDB will be unable to track shl_load/shl_unload calls");
4348 /* Make sure that all storage allocated in decode_line_1 gets freed
4349 in case the following errors out. */
4350 old_chain = make_cleanup (xfree, sals.sals);
4351 if (canonical != (char **) NULL)
4353 make_cleanup (xfree, canonical);
4354 canonical_strings_chain = make_cleanup (null_cleanup, 0);
4355 if (canonical[0] != NULL)
4356 make_cleanup (xfree, canonical[0]);
4359 resolve_sal_pc (&sals.sals[0]);
4361 /* Remove the canonical strings from the cleanup, they are needed below. */
4362 if (canonical != (char **) NULL)
4363 discard_cleanups (canonical_strings_chain);
4365 b = set_raw_breakpoint (sals.sals[0], bp_kind);
4366 set_breakpoint_count (breakpoint_count + 1);
4367 b->number = breakpoint_count;
4369 b->cond_string = (cond_string == NULL) ?
4370 NULL : savestring (cond_string, strlen (cond_string));
4373 if (canonical != (char **) NULL && canonical[0] != NULL)
4374 b->addr_string = canonical[0];
4375 else if (addr_start)
4376 b->addr_string = savestring (addr_start, addr_end - addr_start);
4378 b->enable_state = bp_enabled;
4379 b->disposition = tempflag ? disp_del : disp_donttouch;
4381 if (dll_pathname == NULL)
4382 b->dll_pathname = NULL;
4385 b->dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1);
4386 strcpy (b->dll_pathname, dll_pathname);
4390 do_cleanups (old_chain);
4394 create_solib_load_event_breakpoint (char *hookname, int tempflag,
4395 char *dll_pathname, char *cond_string)
4397 solib_load_unload_1 (hookname, tempflag, dll_pathname,
4398 cond_string, bp_catch_load);
4402 create_solib_unload_event_breakpoint (char *hookname, int tempflag,
4403 char *dll_pathname, char *cond_string)
4405 solib_load_unload_1 (hookname,tempflag, dll_pathname,
4406 cond_string, bp_catch_unload);
4410 create_fork_vfork_event_catchpoint (int tempflag, char *cond_string,
4411 enum bptype bp_kind)
4413 struct symtab_and_line sal;
4414 struct breakpoint *b;
4415 int thread = -1; /* All threads. */
4422 b = set_raw_breakpoint (sal, bp_kind);
4423 set_breakpoint_count (breakpoint_count + 1);
4424 b->number = breakpoint_count;
4426 b->cond_string = (cond_string == NULL) ?
4427 NULL : savestring (cond_string, strlen (cond_string));
4429 b->addr_string = NULL;
4430 b->enable_state = bp_enabled;
4431 b->disposition = tempflag ? disp_del : disp_donttouch;
4432 b->forked_inferior_pid = 0;
4438 create_fork_event_catchpoint (int tempflag, char *cond_string)
4440 create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_fork);
4444 create_vfork_event_catchpoint (int tempflag, char *cond_string)
4446 create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_vfork);
4450 create_exec_event_catchpoint (int tempflag, char *cond_string)
4452 struct symtab_and_line sal;
4453 struct breakpoint *b;
4454 int thread = -1; /* All threads. */
4461 b = set_raw_breakpoint (sal, bp_catch_exec);
4462 set_breakpoint_count (breakpoint_count + 1);
4463 b->number = breakpoint_count;
4465 b->cond_string = (cond_string == NULL) ?
4466 NULL : savestring (cond_string, strlen (cond_string));
4468 b->addr_string = NULL;
4469 b->enable_state = bp_enabled;
4470 b->disposition = tempflag ? disp_del : disp_donttouch;
4476 hw_breakpoint_used_count (void)
4478 struct breakpoint *b;
4483 if (b->type == bp_hardware_breakpoint && b->enable_state == bp_enabled)
4491 hw_watchpoint_used_count (enum bptype type, int *other_type_used)
4493 struct breakpoint *b;
4496 *other_type_used = 0;
4499 if (b->enable_state == bp_enabled)
4501 if (b->type == type)
4503 else if ((b->type == bp_hardware_watchpoint ||
4504 b->type == bp_read_watchpoint ||
4505 b->type == bp_access_watchpoint)
4506 && b->enable_state == bp_enabled)
4507 *other_type_used = 1;
4513 /* Call this after hitting the longjmp() breakpoint. Use this to set
4514 a new breakpoint at the target of the jmp_buf.
4516 FIXME - This ought to be done by setting a temporary breakpoint
4517 that gets deleted automatically... */
4520 set_longjmp_resume_breakpoint (CORE_ADDR pc, struct frame_id frame_id)
4522 struct breakpoint *b;
4525 if (b->type == bp_longjmp_resume)
4527 b->loc->requested_address = pc;
4528 b->loc->address = adjust_breakpoint_address (b->loc->requested_address);
4529 b->enable_state = bp_enabled;
4530 b->frame_id = frame_id;
4531 check_duplicates (b);
4537 disable_watchpoints_before_interactive_call_start (void)
4539 struct breakpoint *b;
4543 if (((b->type == bp_watchpoint)
4544 || (b->type == bp_hardware_watchpoint)
4545 || (b->type == bp_read_watchpoint)
4546 || (b->type == bp_access_watchpoint)
4547 || ep_is_exception_catchpoint (b))
4548 && (b->enable_state == bp_enabled))
4550 b->enable_state = bp_call_disabled;
4551 check_duplicates (b);
4557 enable_watchpoints_after_interactive_call_stop (void)
4559 struct breakpoint *b;
4563 if (((b->type == bp_watchpoint)
4564 || (b->type == bp_hardware_watchpoint)
4565 || (b->type == bp_read_watchpoint)
4566 || (b->type == bp_access_watchpoint)
4567 || ep_is_exception_catchpoint (b))
4568 && (b->enable_state == bp_call_disabled))
4570 b->enable_state = bp_enabled;
4571 check_duplicates (b);
4577 /* Set a breakpoint that will evaporate an end of command
4578 at address specified by SAL.
4579 Restrict it to frame FRAME if FRAME is nonzero. */
4582 set_momentary_breakpoint (struct symtab_and_line sal, struct frame_id frame_id,
4585 struct breakpoint *b;
4586 b = set_raw_breakpoint (sal, type);
4587 b->enable_state = bp_enabled;
4588 b->disposition = disp_donttouch;
4589 b->frame_id = frame_id;
4591 /* If we're debugging a multi-threaded program, then we
4592 want momentary breakpoints to be active in only a
4593 single thread of control. */
4594 if (in_thread_list (inferior_ptid))
4595 b->thread = pid_to_thread_id (inferior_ptid);
4601 /* Tell the user we have just set a breakpoint B. */
4604 mention (struct breakpoint *b)
4607 struct cleanup *old_chain, *ui_out_chain;
4608 struct ui_stream *stb;
4610 stb = ui_out_stream_new (uiout);
4611 old_chain = make_cleanup_ui_out_stream_delete (stb);
4613 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4614 watchpoint) other than breakpoint creation. It should be possible to
4615 clean this up and at the same time replace the random calls to
4616 breakpoint_changed with this hook, as has already been done for
4617 delete_breakpoint_hook and so on. */
4618 if (create_breakpoint_hook)
4619 create_breakpoint_hook (b);
4620 breakpoint_create_event (b->number);
4622 if (b->ops != NULL && b->ops->print_mention != NULL)
4623 b->ops->print_mention (b);
4628 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b->number);
4631 ui_out_text (uiout, "Watchpoint ");
4632 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt");
4633 ui_out_field_int (uiout, "number", b->number);
4634 ui_out_text (uiout, ": ");
4635 print_expression (b->exp, stb->stream);
4636 ui_out_field_stream (uiout, "exp", stb);
4637 do_cleanups (ui_out_chain);
4639 case bp_hardware_watchpoint:
4640 ui_out_text (uiout, "Hardware watchpoint ");
4641 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt");
4642 ui_out_field_int (uiout, "number", b->number);
4643 ui_out_text (uiout, ": ");
4644 print_expression (b->exp, stb->stream);
4645 ui_out_field_stream (uiout, "exp", stb);
4646 do_cleanups (ui_out_chain);
4648 case bp_read_watchpoint:
4649 ui_out_text (uiout, "Hardware read watchpoint ");
4650 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-rwpt");
4651 ui_out_field_int (uiout, "number", b->number);
4652 ui_out_text (uiout, ": ");
4653 print_expression (b->exp, stb->stream);
4654 ui_out_field_stream (uiout, "exp", stb);
4655 do_cleanups (ui_out_chain);
4657 case bp_access_watchpoint:
4658 ui_out_text (uiout, "Hardware access (read/write) watchpoint ");
4659 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-awpt");
4660 ui_out_field_int (uiout, "number", b->number);
4661 ui_out_text (uiout, ": ");
4662 print_expression (b->exp, stb->stream);
4663 ui_out_field_stream (uiout, "exp", stb);
4664 do_cleanups (ui_out_chain);
4667 if (ui_out_is_mi_like_p (uiout))
4672 printf_filtered ("Breakpoint %d", b->number);
4675 case bp_hardware_breakpoint:
4676 if (ui_out_is_mi_like_p (uiout))
4681 printf_filtered ("Hardware assisted breakpoint %d", b->number);
4685 case bp_catch_unload:
4686 printf_filtered ("Catchpoint %d (%s %s)",
4688 (b->type == bp_catch_load) ? "load" : "unload",
4689 (b->dll_pathname != NULL) ?
4690 b->dll_pathname : "<any library>");
4693 case bp_catch_vfork:
4694 printf_filtered ("Catchpoint %d (%s)",
4696 (b->type == bp_catch_fork) ? "fork" : "vfork");
4699 printf_filtered ("Catchpoint %d (exec)",
4702 case bp_catch_catch:
4703 case bp_catch_throw:
4704 printf_filtered ("Catchpoint %d (%s)",
4706 (b->type == bp_catch_catch) ? "catch" : "throw");
4712 case bp_longjmp_resume:
4713 case bp_step_resume:
4714 case bp_through_sigtramp:
4716 case bp_watchpoint_scope:
4717 case bp_shlib_event:
4718 case bp_thread_event:
4719 case bp_overlay_event:
4725 if (addressprint || b->source_file == NULL)
4727 printf_filtered (" at ");
4728 print_address_numeric (b->loc->address, 1, gdb_stdout);
4731 printf_filtered (": file %s, line %d.",
4732 b->source_file, b->line_number);
4734 do_cleanups (old_chain);
4735 if (ui_out_is_mi_like_p (uiout))
4737 printf_filtered ("\n");
4741 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4742 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4743 COND[i] and COND_STRING[i] values.
4745 NOTE: If the function succeeds, the caller is expected to cleanup
4746 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4747 array contents). If the function fails (error() is called), the
4748 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4749 COND and SALS arrays and each of those arrays contents. */
4752 create_breakpoints (struct symtabs_and_lines sals, char **addr_string,
4753 struct expression **cond, char **cond_string,
4754 enum bptype type, enum bpdisp disposition,
4755 int thread, int ignore_count, int from_tty)
4757 if (type == bp_hardware_breakpoint)
4759 int i = hw_breakpoint_used_count ();
4760 int target_resources_ok =
4761 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,
4763 if (target_resources_ok == 0)
4764 error ("No hardware breakpoint support in the target.");
4765 else if (target_resources_ok < 0)
4766 error ("Hardware breakpoints used exceeds limit.");
4769 /* Now set all the breakpoints. */
4772 for (i = 0; i < sals.nelts; i++)
4774 struct breakpoint *b;
4775 struct symtab_and_line sal = sals.sals[i];
4778 describe_other_breakpoints (sal.pc, sal.section);
4780 b = set_raw_breakpoint (sal, type);
4781 set_breakpoint_count (breakpoint_count + 1);
4782 b->number = breakpoint_count;
4786 b->addr_string = addr_string[i];
4788 /* addr_string has to be used or breakpoint_re_set will delete
4790 xasprintf (&b->addr_string, "*0x%s", paddr (b->loc->address));
4791 b->cond_string = cond_string[i];
4792 b->ignore_count = ignore_count;
4793 b->enable_state = bp_enabled;
4794 b->disposition = disposition;
4800 /* Parse ARG which is assumed to be a SAL specification possibly
4801 followed by conditionals. On return, SALS contains an array of SAL
4802 addresses found. ADDR_STRING contains a vector of (canonical)
4803 address strings. ARG points to the end of the SAL. */
4806 parse_breakpoint_sals (char **address,
4807 struct symtabs_and_lines *sals,
4808 char ***addr_string)
4810 char *addr_start = *address;
4811 *addr_string = NULL;
4812 /* If no arg given, or if first arg is 'if ', use the default
4814 if ((*address) == NULL
4815 || (strncmp ((*address), "if", 2) == 0 && isspace ((*address)[2])))
4817 if (default_breakpoint_valid)
4819 struct symtab_and_line sal;
4820 init_sal (&sal); /* initialize to zeroes */
4821 sals->sals = (struct symtab_and_line *)
4822 xmalloc (sizeof (struct symtab_and_line));
4823 sal.pc = default_breakpoint_address;
4824 sal.line = default_breakpoint_line;
4825 sal.symtab = default_breakpoint_symtab;
4826 sal.section = find_pc_overlay (sal.pc);
4827 sals->sals[0] = sal;
4831 error ("No default breakpoint address now.");
4835 /* Force almost all breakpoints to be in terms of the
4836 current_source_symtab (which is decode_line_1's default). This
4837 should produce the results we want almost all of the time while
4838 leaving default_breakpoint_* alone.
4839 ObjC: However, don't match an Objective-C method name which
4840 may have a '+' or '-' succeeded by a '[' */
4842 struct symtab_and_line cursal = get_current_source_symtab_and_line ();
4844 if (default_breakpoint_valid
4846 || ((strchr ("+-", (*address)[0]) != NULL)
4847 && ((*address)[1] != '['))))
4848 *sals = decode_line_1 (address, 1, default_breakpoint_symtab,
4849 default_breakpoint_line, addr_string);
4851 *sals = decode_line_1 (address, 1, (struct symtab *) NULL, 0, addr_string);
4853 /* For any SAL that didn't have a canonical string, fill one in. */
4854 if (sals->nelts > 0 && *addr_string == NULL)
4855 *addr_string = xcalloc (sals->nelts, sizeof (char **));
4856 if (addr_start != (*address))
4859 for (i = 0; i < sals->nelts; i++)
4861 /* Add the string if not present. */
4862 if ((*addr_string)[i] == NULL)
4863 (*addr_string)[i] = savestring (addr_start, (*address) - addr_start);
4869 /* Convert each SAL into a real PC. Verify that the PC can be
4870 inserted as a breakpoint. If it can't throw an error. */
4873 breakpoint_sals_to_pc (struct symtabs_and_lines *sals,
4877 for (i = 0; i < sals->nelts; i++)
4879 resolve_sal_pc (&sals->sals[i]);
4881 /* It's possible for the PC to be nonzero, but still an illegal
4882 value on some targets.
4884 For example, on HP-UX if you start gdb, and before running the
4885 inferior you try to set a breakpoint on a shared library function
4886 "foo" where the inferior doesn't call "foo" directly but does
4887 pass its address to another function call, then we do find a
4888 minimal symbol for the "foo", but it's address is invalid.
4889 (Appears to be an index into a table that the loader sets up
4890 when the inferior is run.)
4892 Give the target a chance to bless sals.sals[i].pc before we
4893 try to make a breakpoint for it. */
4894 if (PC_REQUIRES_RUN_BEFORE_USE (sals->sals[i].pc))
4896 if (address == NULL)
4897 error ("Cannot break without a running program.");
4899 error ("Cannot break on %s without a running program.",
4905 /* Set a breakpoint according to ARG (function, linenum or *address)
4906 flag: first bit : 0 non-temporary, 1 temporary.
4907 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4910 break_command_1 (char *arg, int flag, int from_tty)
4912 int tempflag, hardwareflag;
4913 struct symtabs_and_lines sals;
4914 struct expression **cond = 0;
4915 /* Pointers in arg to the start, and one past the end, of the
4917 char **cond_string = (char **) NULL;
4918 char *addr_start = arg;
4920 struct cleanup *old_chain;
4921 struct cleanup *breakpoint_chain = NULL;
4924 int ignore_count = 0;
4926 hardwareflag = flag & BP_HARDWAREFLAG;
4927 tempflag = flag & BP_TEMPFLAG;
4932 parse_breakpoint_sals (&arg, &sals, &addr_string);
4937 /* Create a chain of things that always need to be cleaned up. */
4938 old_chain = make_cleanup (null_cleanup, 0);
4940 /* Make sure that all storage allocated to SALS gets freed. */
4941 make_cleanup (xfree, sals.sals);
4943 /* Cleanup the addr_string array but not its contents. */
4944 make_cleanup (xfree, addr_string);
4946 /* Allocate space for all the cond expressions. */
4947 cond = xcalloc (sals.nelts, sizeof (struct expression *));
4948 make_cleanup (xfree, cond);
4950 /* Allocate space for all the cond strings. */
4951 cond_string = xcalloc (sals.nelts, sizeof (char **));
4952 make_cleanup (xfree, cond_string);
4954 /* ----------------------------- SNIP -----------------------------
4955 Anything added to the cleanup chain beyond this point is assumed
4956 to be part of a breakpoint. If the breakpoint create succeeds
4957 then the memory is not reclaimed. */
4958 breakpoint_chain = make_cleanup (null_cleanup, 0);
4960 /* Mark the contents of the addr_string for cleanup. These go on
4961 the breakpoint_chain and only occure if the breakpoint create
4963 for (i = 0; i < sals.nelts; i++)
4965 if (addr_string[i] != NULL)
4966 make_cleanup (xfree, addr_string[i]);
4969 /* Resolve all line numbers to PC's and verify that the addresses
4970 are ok for the target. */
4971 breakpoint_sals_to_pc (&sals, addr_start);
4973 /* Verify that condition can be parsed, before setting any
4974 breakpoints. Allocate a separate condition expression for each
4976 thread = -1; /* No specific thread yet */
4977 for (i = 0; i < sals.nelts; i++)
4984 char *cond_start = NULL;
4985 char *cond_end = NULL;
4986 while (*tok == ' ' || *tok == '\t')
4991 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
4994 toklen = end_tok - tok;
4996 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
4998 tok = cond_start = end_tok + 1;
4999 cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
5000 make_cleanup (xfree, cond[i]);
5002 cond_string[i] = savestring (cond_start, cond_end - cond_start);
5003 make_cleanup (xfree, cond_string[i]);
5005 else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
5011 thread = strtol (tok, &tok, 0);
5013 error ("Junk after thread keyword.");
5014 if (!valid_thread_id (thread))
5015 error ("Unknown thread %d\n", thread);
5018 error ("Junk at end of arguments.");
5022 create_breakpoints (sals, addr_string, cond, cond_string,
5023 hardwareflag ? bp_hardware_breakpoint : bp_breakpoint,
5024 tempflag ? disp_del : disp_donttouch,
5025 thread, ignore_count, from_tty);
5029 warning ("Multiple breakpoints were set.");
5030 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5032 /* That's it. Discard the cleanups for data inserted into the
5034 discard_cleanups (breakpoint_chain);
5035 /* But cleanup everything else. */
5036 do_cleanups (old_chain);
5039 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
5040 linenum or *address) with COND and IGNORE_COUNT. */
5042 struct captured_breakpoint_args
5053 do_captured_breakpoint (void *data)
5055 struct captured_breakpoint_args *args = data;
5056 struct symtabs_and_lines sals;
5057 struct expression **cond;
5058 struct cleanup *old_chain;
5059 struct cleanup *breakpoint_chain = NULL;
5066 /* Parse the source and lines spec. Delay check that the expression
5067 didn't contain trailing garbage until after cleanups are in
5071 address_end = args->address;
5073 parse_breakpoint_sals (&address_end, &sals, &addr_string);
5078 /* Create a chain of things at always need to be cleaned up. */
5079 old_chain = make_cleanup (null_cleanup, 0);
5081 /* Always have a addr_string array, even if it is empty. */
5082 make_cleanup (xfree, addr_string);
5084 /* Make sure that all storage allocated to SALS gets freed. */
5085 make_cleanup (xfree, sals.sals);
5087 /* Allocate space for all the cond expressions. */
5088 cond = xcalloc (sals.nelts, sizeof (struct expression *));
5089 make_cleanup (xfree, cond);
5091 /* Allocate space for all the cond strings. */
5092 cond_string = xcalloc (sals.nelts, sizeof (char **));
5093 make_cleanup (xfree, cond_string);
5095 /* ----------------------------- SNIP -----------------------------
5096 Anything added to the cleanup chain beyond this point is assumed
5097 to be part of a breakpoint. If the breakpoint create goes
5098 through then that memory is not cleaned up. */
5099 breakpoint_chain = make_cleanup (null_cleanup, 0);
5101 /* Mark the contents of the addr_string for cleanup. These go on
5102 the breakpoint_chain and only occure if the breakpoint create
5104 for (i = 0; i < sals.nelts; i++)
5106 if (addr_string[i] != NULL)
5107 make_cleanup (xfree, addr_string[i]);
5110 /* Wait until now before checking for garbage at the end of the
5111 address. That way cleanups can take care of freeing any
5113 if (*address_end != '\0')
5114 error ("Garbage %s following breakpoint address", address_end);
5116 /* Resolve all line numbers to PC's. */
5117 breakpoint_sals_to_pc (&sals, args->address);
5119 /* Verify that conditions can be parsed, before setting any
5121 for (i = 0; i < sals.nelts; i++)
5123 if (args->condition != NULL)
5125 char *tok = args->condition;
5126 cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
5128 error ("Garbage %s follows condition", tok);
5129 make_cleanup (xfree, cond[i]);
5130 cond_string[i] = xstrdup (args->condition);
5134 create_breakpoints (sals, addr_string, cond, cond_string,
5135 args->hardwareflag ? bp_hardware_breakpoint : bp_breakpoint,
5136 args->tempflag ? disp_del : disp_donttouch,
5137 args->thread, args->ignore_count, 0/*from-tty*/);
5139 /* That's it. Discard the cleanups for data inserted into the
5141 discard_cleanups (breakpoint_chain);
5142 /* But cleanup everything else. */
5143 do_cleanups (old_chain);
5148 gdb_breakpoint (char *address, char *condition,
5149 int hardwareflag, int tempflag,
5150 int thread, int ignore_count)
5152 struct captured_breakpoint_args args;
5153 args.address = address;
5154 args.condition = condition;
5155 args.hardwareflag = hardwareflag;
5156 args.tempflag = tempflag;
5157 args.thread = thread;
5158 args.ignore_count = ignore_count;
5159 return catch_errors (do_captured_breakpoint, &args,
5160 NULL, RETURN_MASK_ALL);
5165 break_at_finish_at_depth_command_1 (char *arg, int flag, int from_tty)
5167 struct frame_info *frame;
5168 CORE_ADDR low, high, selected_pc = 0;
5169 char *extra_args = NULL;
5171 int extra_args_len = 0, if_arg = 0;
5174 (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
5177 if (default_breakpoint_valid)
5179 if (deprecated_selected_frame)
5181 selected_pc = get_frame_pc (deprecated_selected_frame);
5186 error ("No selected frame.");
5189 error ("No default breakpoint address now.");
5193 extra_args = strchr (arg, ' ');
5197 extra_args_len = strlen (extra_args);
5198 level_arg = (char *) xmalloc (extra_args - arg);
5199 strncpy (level_arg, arg, extra_args - arg - 1);
5200 level_arg[extra_args - arg - 1] = '\0';
5204 level_arg = (char *) xmalloc (strlen (arg) + 1);
5205 strcpy (level_arg, arg);
5208 frame = parse_frame_specification (level_arg);
5210 selected_pc = get_frame_pc (frame);
5217 extra_args_len = strlen (arg);
5222 if (find_pc_partial_function (selected_pc, (char **) NULL, &low, &high))
5226 addr_string = xstrprintf ("*0x%s %s", paddr_nz (high), extra_args);
5228 addr_string = xstrprintf ("*0x%s", paddr_nz (high));
5229 break_command_1 (addr_string, flag, from_tty);
5230 xfree (addr_string);
5233 error ("No function contains the specified address");
5236 error ("Unable to set breakpoint at procedure exit");
5241 break_at_finish_command_1 (char *arg, int flag, int from_tty)
5243 char *addr_string, *break_string, *beg_addr_string;
5244 CORE_ADDR low, high;
5245 struct symtabs_and_lines sals;
5246 struct symtab_and_line sal;
5247 struct cleanup *old_chain;
5248 char *extra_args = NULL;
5249 int extra_args_len = 0;
5253 (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
5255 if (default_breakpoint_valid)
5257 if (deprecated_selected_frame)
5259 addr_string = xstrprintf ("*0x%s",
5260 paddr_nz (get_frame_pc (deprecated_selected_frame)));
5265 error ("No selected frame.");
5268 error ("No default breakpoint address now.");
5272 addr_string = (char *) xmalloc (strlen (arg) + 1);
5273 strcpy (addr_string, arg);
5279 extra_args_len = strlen (arg);
5283 /* get the stuff after the function name or address */
5284 extra_args = strchr (arg, ' ');
5288 extra_args_len = strlen (extra_args);
5295 beg_addr_string = addr_string;
5296 sals = decode_line_1 (&addr_string, 1, (struct symtab *) NULL, 0,
5299 xfree (beg_addr_string);
5300 old_chain = make_cleanup (xfree, sals.sals);
5301 for (i = 0; (i < sals.nelts); i++)
5304 if (find_pc_partial_function (sal.pc, (char **) NULL, &low, &high))
5308 break_string = xstrprintf ("*0x%s %s", paddr_nz (high),
5311 break_string = xstrprintf ("*0x%s", paddr_nz (high));
5312 break_command_1 (break_string, flag, from_tty);
5313 xfree (break_string);
5316 error ("No function contains the specified address");
5320 warning ("Multiple breakpoints were set.\n");
5321 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5323 do_cleanups (old_chain);
5327 /* Helper function for break_command_1 and disassemble_command. */
5330 resolve_sal_pc (struct symtab_and_line *sal)
5334 if (sal->pc == 0 && sal->symtab != NULL)
5336 if (!find_line_pc (sal->symtab, sal->line, &pc))
5337 error ("No line %d in file \"%s\".",
5338 sal->line, sal->symtab->filename);
5342 if (sal->section == 0 && sal->symtab != NULL)
5344 struct blockvector *bv;
5349 bv = blockvector_for_pc_sect (sal->pc, 0, &index, sal->symtab);
5352 b = BLOCKVECTOR_BLOCK (bv, index);
5353 sym = block_function (b);
5356 fixup_symbol_section (sym, sal->symtab->objfile);
5357 sal->section = SYMBOL_BFD_SECTION (sym);
5361 /* It really is worthwhile to have the section, so we'll just
5362 have to look harder. This case can be executed if we have
5363 line numbers but no functions (as can happen in assembly
5366 struct minimal_symbol *msym;
5368 msym = lookup_minimal_symbol_by_pc (sal->pc);
5370 sal->section = SYMBOL_BFD_SECTION (msym);
5377 break_command (char *arg, int from_tty)
5379 break_command_1 (arg, 0, from_tty);
5383 break_at_finish_command (char *arg, int from_tty)
5385 break_at_finish_command_1 (arg, 0, from_tty);
5389 break_at_finish_at_depth_command (char *arg, int from_tty)
5391 break_at_finish_at_depth_command_1 (arg, 0, from_tty);
5395 tbreak_command (char *arg, int from_tty)
5397 break_command_1 (arg, BP_TEMPFLAG, from_tty);
5401 tbreak_at_finish_command (char *arg, int from_tty)
5403 break_at_finish_command_1 (arg, BP_TEMPFLAG, from_tty);
5407 hbreak_command (char *arg, int from_tty)
5409 break_command_1 (arg, BP_HARDWAREFLAG, from_tty);
5413 thbreak_command (char *arg, int from_tty)
5415 break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty);
5419 stop_command (char *arg, int from_tty)
5421 printf_filtered ("Specify the type of breakpoint to set.\n\
5422 Usage: stop in <function | address>\n\
5427 stopin_command (char *arg, int from_tty)
5431 if (arg == (char *) NULL)
5433 else if (*arg != '*')
5438 /* look for a ':'. If this is a line number specification, then
5439 say it is bad, otherwise, it should be an address or
5440 function/method name */
5441 while (*argptr && !hasColon)
5443 hasColon = (*argptr == ':');
5448 badInput = (*argptr != ':'); /* Not a class::method */
5450 badInput = isdigit (*arg); /* a simple line number */
5454 printf_filtered ("Usage: stop in <function | address>\n");
5456 break_command_1 (arg, 0, from_tty);
5460 stopat_command (char *arg, int from_tty)
5464 if (arg == (char *) NULL || *arg == '*') /* no line number */
5471 /* look for a ':'. If there is a '::' then get out, otherwise
5472 it is probably a line number. */
5473 while (*argptr && !hasColon)
5475 hasColon = (*argptr == ':');
5480 badInput = (*argptr == ':'); /* we have class::method */
5482 badInput = !isdigit (*arg); /* not a line number */
5486 printf_filtered ("Usage: stop at <line>\n");
5488 break_command_1 (arg, 0, from_tty);
5491 /* accessflag: hw_write: watch write,
5492 hw_read: watch read,
5493 hw_access: watch access (read or write) */
5495 watch_command_1 (char *arg, int accessflag, int from_tty)
5497 struct breakpoint *b;
5498 struct symtab_and_line sal;
5499 struct expression *exp;
5500 struct block *exp_valid_block;
5501 struct value *val, *mark;
5502 struct frame_info *frame;
5503 struct frame_info *prev_frame = NULL;
5504 char *exp_start = NULL;
5505 char *exp_end = NULL;
5506 char *tok, *end_tok;
5508 char *cond_start = NULL;
5509 char *cond_end = NULL;
5510 struct expression *cond = NULL;
5511 int i, other_type_used, target_resources_ok = 0;
5512 enum bptype bp_type;
5515 init_sal (&sal); /* initialize to zeroes */
5517 /* Parse arguments. */
5518 innermost_block = NULL;
5520 exp = parse_exp_1 (&arg, 0, 0);
5522 exp_valid_block = innermost_block;
5523 mark = value_mark ();
5524 val = evaluate_expression (exp);
5525 release_value (val);
5526 if (VALUE_LAZY (val))
5527 value_fetch_lazy (val);
5530 while (*tok == ' ' || *tok == '\t')
5534 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
5537 toklen = end_tok - tok;
5538 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
5540 tok = cond_start = end_tok + 1;
5541 cond = parse_exp_1 (&tok, 0, 0);
5545 error ("Junk at end of command.");
5547 if (accessflag == hw_read)
5548 bp_type = bp_read_watchpoint;
5549 else if (accessflag == hw_access)
5550 bp_type = bp_access_watchpoint;
5552 bp_type = bp_hardware_watchpoint;
5554 mem_cnt = can_use_hardware_watchpoint (val);
5555 if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint)
5556 error ("Expression cannot be implemented with read/access watchpoint.");
5559 i = hw_watchpoint_used_count (bp_type, &other_type_used);
5560 target_resources_ok =
5561 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type, i + mem_cnt,
5563 if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint)
5564 error ("Target does not support this type of hardware watchpoint.");
5566 if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint)
5567 error ("Target can only support one kind of HW watchpoint at a time.");
5570 #if defined(HPUXHPPA)
5571 /* On HP-UX if you set a h/w
5572 watchpoint before the "run" command, the inferior dies with a e.g.,
5573 SIGILL once you start it. I initially believed this was due to a
5574 bad interaction between page protection traps and the initial
5575 startup sequence by the dynamic linker.
5577 However, I tried avoiding that by having HP-UX's implementation of
5578 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5579 yet, which forced slow watches before a "run" or "attach", and it
5580 still fails somewhere in the startup code.
5582 Until I figure out what's happening, I'm disallowing watches altogether
5583 before the "run" or "attach" command. We'll tell the user they must
5584 set watches after getting the program started. */
5585 if (!target_has_execution)
5587 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5590 #endif /* HPUXHPPA */
5592 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5593 watchpoint could not be set. */
5594 if (!mem_cnt || target_resources_ok <= 0)
5595 bp_type = bp_watchpoint;
5597 /* Now set up the breakpoint. */
5598 b = set_raw_breakpoint (sal, bp_type);
5599 set_breakpoint_count (breakpoint_count + 1);
5600 b->number = breakpoint_count;
5601 b->disposition = disp_donttouch;
5603 b->exp_valid_block = exp_valid_block;
5604 b->exp_string = savestring (exp_start, exp_end - exp_start);
5608 b->cond_string = savestring (cond_start, cond_end - cond_start);
5612 frame = block_innermost_frame (exp_valid_block);
5615 prev_frame = get_prev_frame (frame);
5616 b->watchpoint_frame = get_frame_id (frame);
5620 memset (&b->watchpoint_frame, 0, sizeof (b->watchpoint_frame));
5623 /* If the expression is "local", then set up a "watchpoint scope"
5624 breakpoint at the point where we've left the scope of the watchpoint
5626 if (innermost_block)
5630 struct breakpoint *scope_breakpoint;
5631 scope_breakpoint = create_internal_breakpoint (get_frame_pc (prev_frame),
5632 bp_watchpoint_scope);
5634 scope_breakpoint->enable_state = bp_enabled;
5636 /* Automatically delete the breakpoint when it hits. */
5637 scope_breakpoint->disposition = disp_del;
5639 /* Only break in the proper frame (help with recursion). */
5640 scope_breakpoint->frame_id = get_frame_id (prev_frame);
5642 /* Set the address at which we will stop. */
5643 scope_breakpoint->loc->requested_address
5644 = get_frame_pc (prev_frame);
5645 scope_breakpoint->loc->address
5646 = adjust_breakpoint_address (scope_breakpoint->loc->requested_address);
5648 /* The scope breakpoint is related to the watchpoint. We
5649 will need to act on them together. */
5650 b->related_breakpoint = scope_breakpoint;
5653 value_free_to_mark (mark);
5657 /* Return count of locations need to be watched and can be handled
5658 in hardware. If the watchpoint can not be handled
5659 in hardware return zero. */
5661 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5662 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5663 ((BYTE_SIZE) <= (DEPRECATED_REGISTER_SIZE))
5666 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5667 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5668 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5672 can_use_hardware_watchpoint (struct value *v)
5674 int found_memory_cnt = 0;
5675 struct value *head = v;
5677 /* Did the user specifically forbid us to use hardware watchpoints? */
5678 if (!can_use_hw_watchpoints)
5681 /* Make sure that the value of the expression depends only upon
5682 memory contents, and values computed from them within GDB. If we
5683 find any register references or function calls, we can't use a
5684 hardware watchpoint.
5686 The idea here is that evaluating an expression generates a series
5687 of values, one holding the value of every subexpression. (The
5688 expression a*b+c has five subexpressions: a, b, a*b, c, and
5689 a*b+c.) GDB's values hold almost enough information to establish
5690 the criteria given above --- they identify memory lvalues,
5691 register lvalues, computed values, etcetera. So we can evaluate
5692 the expression, and then scan the chain of values that leaves
5693 behind to decide whether we can detect any possible change to the
5694 expression's final value using only hardware watchpoints.
5696 However, I don't think that the values returned by inferior
5697 function calls are special in any way. So this function may not
5698 notice that an expression involving an inferior function call
5699 can't be watched with hardware watchpoints. FIXME. */
5700 for (; v; v = v->next)
5702 if (VALUE_LVAL (v) == lval_memory)
5705 /* A lazy memory lvalue is one that GDB never needed to fetch;
5706 we either just used its address (e.g., `a' in `a.b') or
5707 we never needed it at all (e.g., `a' in `a,b'). */
5711 /* Ahh, memory we actually used! Check if we can cover
5712 it with hardware watchpoints. */
5713 struct type *vtype = check_typedef (VALUE_TYPE (v));
5715 /* We only watch structs and arrays if user asked for it
5716 explicitly, never if they just happen to appear in a
5717 middle of some value chain. */
5719 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
5720 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
5722 CORE_ADDR vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
5723 int len = TYPE_LENGTH (VALUE_TYPE (v));
5725 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr, len))
5732 else if (v->lval != not_lval && v->modifiable == 0)
5733 return 0; /* ??? What does this represent? */
5734 else if (v->lval == lval_register)
5735 return 0; /* cannot watch a register with a HW watchpoint */
5738 /* The expression itself looks suitable for using a hardware
5739 watchpoint, but give the target machine a chance to reject it. */
5740 return found_memory_cnt;
5744 watch_command_wrapper (char *arg, int from_tty)
5746 watch_command (arg, from_tty);
5750 watch_command (char *arg, int from_tty)
5752 watch_command_1 (arg, hw_write, from_tty);
5756 rwatch_command_wrapper (char *arg, int from_tty)
5758 rwatch_command (arg, from_tty);
5762 rwatch_command (char *arg, int from_tty)
5764 watch_command_1 (arg, hw_read, from_tty);
5768 awatch_command_wrapper (char *arg, int from_tty)
5770 awatch_command (arg, from_tty);
5774 awatch_command (char *arg, int from_tty)
5776 watch_command_1 (arg, hw_access, from_tty);
5780 /* Helper routines for the until_command routine in infcmd.c. Here
5781 because it uses the mechanisms of breakpoints. */
5783 /* This function is called by fetch_inferior_event via the
5784 cmd_continuation pointer, to complete the until command. It takes
5785 care of cleaning up the temporary breakpoints set up by the until
5788 until_break_command_continuation (struct continuation_arg *arg)
5790 struct cleanup *cleanups;
5792 cleanups = (struct cleanup *) arg->data.pointer;
5793 do_exec_cleanups (cleanups);
5797 until_break_command (char *arg, int from_tty, int anywhere)
5799 struct symtabs_and_lines sals;
5800 struct symtab_and_line sal;
5801 struct frame_info *prev_frame = get_prev_frame (deprecated_selected_frame);
5802 struct breakpoint *breakpoint;
5803 struct cleanup *old_chain;
5804 struct continuation_arg *arg1;
5807 clear_proceed_status ();
5809 /* Set a breakpoint where the user wants it and at return from
5812 if (default_breakpoint_valid)
5813 sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
5814 default_breakpoint_line, (char ***) NULL);
5816 sals = decode_line_1 (&arg, 1, (struct symtab *) NULL,
5817 0, (char ***) NULL);
5819 if (sals.nelts != 1)
5820 error ("Couldn't get information on specified line.");
5823 xfree (sals.sals); /* malloc'd, so freed */
5826 error ("Junk at end of arguments.");
5828 resolve_sal_pc (&sal);
5831 /* If the user told us to continue until a specified location,
5832 we don't specify a frame at which we need to stop. */
5833 breakpoint = set_momentary_breakpoint (sal, null_frame_id, bp_until);
5835 /* Otherwise, specify the current frame, because we want to stop only
5836 at the very same frame. */
5837 breakpoint = set_momentary_breakpoint (sal,
5838 get_frame_id (deprecated_selected_frame),
5841 if (!event_loop_p || !target_can_async_p ())
5842 old_chain = make_cleanup_delete_breakpoint (breakpoint);
5844 old_chain = make_exec_cleanup_delete_breakpoint (breakpoint);
5846 /* If we are running asynchronously, and the target supports async
5847 execution, we are not waiting for the target to stop, in the call
5848 tp proceed, below. This means that we cannot delete the
5849 brekpoints until the target has actually stopped. The only place
5850 where we get a chance to do that is in fetch_inferior_event, so
5851 we must set things up for that. */
5853 if (event_loop_p && target_can_async_p ())
5855 /* In this case the arg for the continuation is just the point
5856 in the exec_cleanups chain from where to start doing
5857 cleanups, because all the continuation does is the cleanups in
5858 the exec_cleanup_chain. */
5860 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
5862 arg1->data.pointer = old_chain;
5864 add_continuation (until_break_command_continuation, arg1);
5867 /* Keep within the current frame, or in frames called by the current
5871 sal = find_pc_line (get_frame_pc (prev_frame), 0);
5872 sal.pc = get_frame_pc (prev_frame);
5873 breakpoint = set_momentary_breakpoint (sal, get_frame_id (prev_frame),
5875 if (!event_loop_p || !target_can_async_p ())
5876 make_cleanup_delete_breakpoint (breakpoint);
5878 make_exec_cleanup_delete_breakpoint (breakpoint);
5881 proceed (-1, TARGET_SIGNAL_DEFAULT, 0);
5882 /* Do the cleanups now, anly if we are not running asynchronously,
5883 of if we are, but the target is still synchronous. */
5884 if (!event_loop_p || !target_can_async_p ())
5885 do_cleanups (old_chain);
5889 /* These aren't used; I don't konw what they were for. */
5890 /* Set a breakpoint at the catch clause for NAME. */
5892 catch_breakpoint (char *name)
5897 disable_catch_breakpoint (void)
5902 delete_catch_breakpoint (void)
5907 enable_catch_breakpoint (void)
5913 ep_skip_leading_whitespace (char **s)
5915 if ((s == NULL) || (*s == NULL))
5917 while (isspace (**s))
5921 /* This function examines a string, and attempts to find a token
5922 that might be an event name in the leading characters. If a
5923 possible match is found, a pointer to the last character of
5924 the token is returned. Else, NULL is returned. */
5927 ep_find_event_name_end (char *arg)
5930 char *event_name_end = NULL;
5932 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5936 /* We break out of the loop when we find a token delimiter.
5937 Basically, we're looking for alphanumerics and underscores;
5938 anything else delimites the token. */
5941 if (!isalnum (*s) && (*s != '_'))
5947 return event_name_end;
5951 /* This function attempts to parse an optional "if <cond>" clause
5952 from the arg string. If one is not found, it returns NULL.
5954 Else, it returns a pointer to the condition string. (It does not
5955 attempt to evaluate the string against a particular block.) And,
5956 it updates arg to point to the first character following the parsed
5957 if clause in the arg string. */
5960 ep_parse_optional_if_clause (char **arg)
5964 if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2]))
5967 /* Skip the "if" keyword. */
5970 /* Skip any extra leading whitespace, and record the start of the
5971 condition string. */
5972 ep_skip_leading_whitespace (arg);
5975 /* Assume that the condition occupies the remainder of the arg string. */
5976 (*arg) += strlen (cond_string);
5981 /* This function attempts to parse an optional filename from the arg
5982 string. If one is not found, it returns NULL.
5984 Else, it returns a pointer to the parsed filename. (This function
5985 makes no attempt to verify that a file of that name exists, or is
5986 accessible.) And, it updates arg to point to the first character
5987 following the parsed filename in the arg string.
5989 Note that clients needing to preserve the returned filename for
5990 future access should copy it to their own buffers. */
5992 ep_parse_optional_filename (char **arg)
5994 static char filename[1024];
5999 if ((*arg_p == '\0') || isspace (*arg_p))
6017 /* Commands to deal with catching events, such as signals, exceptions,
6018 process start/exit, etc. */
6022 catch_fork, catch_vfork
6026 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
6027 static void catch_fork_command_1 (catch_fork_kind fork_kind,
6028 char *arg, int tempflag, int from_tty);
6031 catch_fork_command_1 (catch_fork_kind fork_kind, char *arg, int tempflag,
6034 char *cond_string = NULL;
6036 ep_skip_leading_whitespace (&arg);
6038 /* The allowed syntax is:
6040 catch [v]fork if <cond>
6042 First, check if there's an if clause. */
6043 cond_string = ep_parse_optional_if_clause (&arg);
6045 if ((*arg != '\0') && !isspace (*arg))
6046 error ("Junk at end of arguments.");
6048 /* If this target supports it, create a fork or vfork catchpoint
6049 and enable reporting of such events. */
6053 create_fork_event_catchpoint (tempflag, cond_string);
6056 create_vfork_event_catchpoint (tempflag, cond_string);
6059 error ("unsupported or unknown fork kind; cannot catch it");
6065 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6067 catch_exec_command_1 (char *arg, int tempflag, int from_tty)
6069 char *cond_string = NULL;
6071 ep_skip_leading_whitespace (&arg);
6073 /* The allowed syntax is:
6075 catch exec if <cond>
6077 First, check if there's an if clause. */
6078 cond_string = ep_parse_optional_if_clause (&arg);
6080 if ((*arg != '\0') && !isspace (*arg))
6081 error ("Junk at end of arguments.");
6083 /* If this target supports it, create an exec catchpoint
6084 and enable reporting of such events. */
6085 create_exec_event_catchpoint (tempflag, cond_string);
6089 #if defined(SOLIB_ADD)
6091 catch_load_command_1 (char *arg, int tempflag, int from_tty)
6093 char *dll_pathname = NULL;
6094 char *cond_string = NULL;
6096 ep_skip_leading_whitespace (&arg);
6098 /* The allowed syntax is:
6100 catch load if <cond>
6101 catch load <filename>
6102 catch load <filename> if <cond>
6104 The user is not allowed to specify the <filename> after an
6107 We'll ignore the pathological case of a file named "if".
6109 First, check if there's an if clause. If so, then there
6110 cannot be a filename. */
6111 cond_string = ep_parse_optional_if_clause (&arg);
6113 /* If there was an if clause, then there cannot be a filename.
6114 Else, there might be a filename and an if clause. */
6115 if (cond_string == NULL)
6117 dll_pathname = ep_parse_optional_filename (&arg);
6118 ep_skip_leading_whitespace (&arg);
6119 cond_string = ep_parse_optional_if_clause (&arg);
6122 if ((*arg != '\0') && !isspace (*arg))
6123 error ("Junk at end of arguments.");
6125 /* Create a load breakpoint that only triggers when a load of
6126 the specified dll (or any dll, if no pathname was specified)
6128 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid), tempflag,
6129 dll_pathname, cond_string);
6133 catch_unload_command_1 (char *arg, int tempflag, int from_tty)
6135 char *dll_pathname = NULL;
6136 char *cond_string = NULL;
6138 ep_skip_leading_whitespace (&arg);
6140 /* The allowed syntax is:
6142 catch unload if <cond>
6143 catch unload <filename>
6144 catch unload <filename> if <cond>
6146 The user is not allowed to specify the <filename> after an
6149 We'll ignore the pathological case of a file named "if".
6151 First, check if there's an if clause. If so, then there
6152 cannot be a filename. */
6153 cond_string = ep_parse_optional_if_clause (&arg);
6155 /* If there was an if clause, then there cannot be a filename.
6156 Else, there might be a filename and an if clause. */
6157 if (cond_string == NULL)
6159 dll_pathname = ep_parse_optional_filename (&arg);
6160 ep_skip_leading_whitespace (&arg);
6161 cond_string = ep_parse_optional_if_clause (&arg);
6164 if ((*arg != '\0') && !isspace (*arg))
6165 error ("Junk at end of arguments.");
6167 /* Create an unload breakpoint that only triggers when an unload of
6168 the specified dll (or any dll, if no pathname was specified)
6170 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid), tempflag,
6171 dll_pathname, cond_string);
6173 #endif /* SOLIB_ADD */
6175 /* Commands to deal with catching exceptions. */
6177 /* Set a breakpoint at the specified callback routine for an
6178 exception event callback */
6181 create_exception_catchpoint (int tempflag, char *cond_string,
6182 enum exception_event_kind ex_event,
6183 struct symtab_and_line *sal)
6185 struct breakpoint *b;
6186 int thread = -1; /* All threads. */
6189 if (!sal) /* no exception support? */
6194 case EX_EVENT_THROW:
6195 bptype = bp_catch_throw;
6197 case EX_EVENT_CATCH:
6198 bptype = bp_catch_catch;
6200 default: /* error condition */
6201 error ("Internal error -- invalid catchpoint kind");
6204 b = set_raw_breakpoint (*sal, bptype);
6205 set_breakpoint_count (breakpoint_count + 1);
6206 b->number = breakpoint_count;
6208 b->cond_string = (cond_string == NULL) ?
6209 NULL : savestring (cond_string, strlen (cond_string));
6211 b->addr_string = NULL;
6212 b->enable_state = bp_enabled;
6213 b->disposition = tempflag ? disp_del : disp_donttouch;
6217 static enum print_stop_action
6218 print_exception_catchpoint (struct breakpoint *b)
6220 annotate_catchpoint (b->number);
6222 if (strstr (b->addr_string, "throw") != NULL)
6223 printf_filtered ("\nCatchpoint %d (exception thrown)\n",
6226 printf_filtered ("\nCatchpoint %d (exception caught)\n",
6229 return PRINT_SRC_AND_LOC;
6233 print_one_exception_catchpoint (struct breakpoint *b, CORE_ADDR *last_addr)
6238 ui_out_field_core_addr (uiout, "addr", b->loc->address);
6241 *last_addr = b->loc->address;
6242 if (strstr (b->addr_string, "throw") != NULL)
6243 ui_out_field_string (uiout, "what", "exception throw");
6245 ui_out_field_string (uiout, "what", "exception catch");
6249 print_mention_exception_catchpoint (struct breakpoint *b)
6251 if (strstr (b->addr_string, "throw") != NULL)
6252 printf_filtered ("Catchpoint %d (throw)", b->number);
6254 printf_filtered ("Catchpoint %d (catch)", b->number);
6257 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops = {
6258 print_exception_catchpoint,
6259 print_one_exception_catchpoint,
6260 print_mention_exception_catchpoint
6264 handle_gnu_v3_exceptions (int tempflag, char *cond_string,
6265 enum exception_event_kind ex_event, int from_tty)
6267 char *trigger_func_name, *nameptr;
6268 struct symtabs_and_lines sals;
6269 struct breakpoint *b;
6271 if (ex_event == EX_EVENT_CATCH)
6272 trigger_func_name = xstrdup ("__cxa_begin_catch");
6274 trigger_func_name = xstrdup ("__cxa_throw");
6276 nameptr = trigger_func_name;
6277 sals = decode_line_1 (&nameptr, 1, NULL, 0, NULL);
6278 if (sals.nelts == 0)
6280 xfree (trigger_func_name);
6284 b = set_raw_breakpoint (sals.sals[0], bp_breakpoint);
6285 set_breakpoint_count (breakpoint_count + 1);
6286 b->number = breakpoint_count;
6288 b->cond_string = (cond_string == NULL) ?
6289 NULL : savestring (cond_string, strlen (cond_string));
6291 b->addr_string = trigger_func_name;
6292 b->enable_state = bp_enabled;
6293 b->disposition = tempflag ? disp_del : disp_donttouch;
6294 b->ops = &gnu_v3_exception_catchpoint_ops;
6301 /* Deal with "catch catch" and "catch throw" commands */
6304 catch_exception_command_1 (enum exception_event_kind ex_event, char *arg,
6305 int tempflag, int from_tty)
6307 char *cond_string = NULL;
6308 struct symtab_and_line *sal = NULL;
6310 ep_skip_leading_whitespace (&arg);
6312 cond_string = ep_parse_optional_if_clause (&arg);
6314 if ((*arg != '\0') && !isspace (*arg))
6315 error ("Junk at end of arguments.");
6317 if ((ex_event != EX_EVENT_THROW) &&
6318 (ex_event != EX_EVENT_CATCH))
6319 error ("Unsupported or unknown exception event; cannot catch it");
6321 if (handle_gnu_v3_exceptions (tempflag, cond_string, ex_event, from_tty))
6324 /* See if we can find a callback routine */
6325 sal = target_enable_exception_callback (ex_event, 1);
6329 /* We have callbacks from the runtime system for exceptions.
6330 Set a breakpoint on the sal found, if no errors */
6331 if (sal != (struct symtab_and_line *) -1)
6332 create_exception_catchpoint (tempflag, cond_string, ex_event, sal);
6334 return; /* something went wrong with setting up callbacks */
6337 warning ("Unsupported with this platform/compiler combination.");
6340 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6341 inside a catch_errors */
6344 cover_target_enable_exception_callback (void *arg)
6346 args_for_catchpoint_enable *args = arg;
6347 struct symtab_and_line *sal;
6348 sal = target_enable_exception_callback (args->kind, args->enable_p);
6351 else if (sal == (struct symtab_and_line *) -1)
6354 return 1; /*is valid */
6358 catch_command_1 (char *arg, int tempflag, int from_tty)
6361 /* The first argument may be an event name, such as "start" or "load".
6362 If so, then handle it as such. If it doesn't match an event name,
6363 then attempt to interpret it as an exception name. (This latter is
6364 the v4.16-and-earlier GDB meaning of the "catch" command.)
6366 First, try to find the bounds of what might be an event name. */
6367 char *arg1_start = arg;
6371 if (arg1_start == NULL)
6373 /* Old behaviour was to use pre-v-4.16 syntax */
6374 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6376 /* Now, this is not allowed */
6377 error ("Catch requires an event name.");
6380 arg1_end = ep_find_event_name_end (arg1_start);
6381 if (arg1_end == NULL)
6382 error ("catch requires an event");
6383 arg1_length = arg1_end + 1 - arg1_start;
6385 /* Try to match what we found against known event names. */
6386 if (strncmp (arg1_start, "signal", arg1_length) == 0)
6388 error ("Catch of signal not yet implemented");
6390 else if (strncmp (arg1_start, "catch", arg1_length) == 0)
6392 catch_exception_command_1 (EX_EVENT_CATCH, arg1_end + 1,
6393 tempflag, from_tty);
6395 else if (strncmp (arg1_start, "throw", arg1_length) == 0)
6397 catch_exception_command_1 (EX_EVENT_THROW, arg1_end + 1,
6398 tempflag, from_tty);
6400 else if (strncmp (arg1_start, "thread_start", arg1_length) == 0)
6402 error ("Catch of thread_start not yet implemented");
6404 else if (strncmp (arg1_start, "thread_exit", arg1_length) == 0)
6406 error ("Catch of thread_exit not yet implemented");
6408 else if (strncmp (arg1_start, "thread_join", arg1_length) == 0)
6410 error ("Catch of thread_join not yet implemented");
6412 else if (strncmp (arg1_start, "start", arg1_length) == 0)
6414 error ("Catch of start not yet implemented");
6416 else if (strncmp (arg1_start, "exit", arg1_length) == 0)
6418 error ("Catch of exit not yet implemented");
6420 else if (strncmp (arg1_start, "fork", arg1_length) == 0)
6422 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6423 catch_fork_command_1 (catch_fork, arg1_end + 1, tempflag, from_tty);
6425 error ("Catch of fork not yet implemented");
6428 else if (strncmp (arg1_start, "vfork", arg1_length) == 0)
6430 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6431 catch_fork_command_1 (catch_vfork, arg1_end + 1, tempflag, from_tty);
6433 error ("Catch of vfork not yet implemented");
6436 else if (strncmp (arg1_start, "exec", arg1_length) == 0)
6438 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6439 catch_exec_command_1 (arg1_end + 1, tempflag, from_tty);
6441 error ("Catch of exec not yet implemented");
6444 else if (strncmp (arg1_start, "load", arg1_length) == 0)
6446 #if defined(SOLIB_ADD)
6447 catch_load_command_1 (arg1_end + 1, tempflag, from_tty);
6449 error ("Catch of load not implemented");
6452 else if (strncmp (arg1_start, "unload", arg1_length) == 0)
6454 #if defined(SOLIB_ADD)
6455 catch_unload_command_1 (arg1_end + 1, tempflag, from_tty);
6457 error ("Catch of load not implemented");
6460 else if (strncmp (arg1_start, "stop", arg1_length) == 0)
6462 error ("Catch of stop not yet implemented");
6465 /* This doesn't appear to be an event name */
6469 /* Pre-v.4.16 behaviour was to treat the argument
6470 as the name of an exception */
6471 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6472 /* Now this is not allowed */
6473 error ("Unknown event kind specified for catch");
6478 /* Used by the gui, could be made a worker for other things. */
6481 set_breakpoint_sal (struct symtab_and_line sal)
6483 struct breakpoint *b;
6484 b = set_raw_breakpoint (sal, bp_breakpoint);
6485 set_breakpoint_count (breakpoint_count + 1);
6486 b->number = breakpoint_count;
6493 /* These aren't used; I don't know what they were for. */
6494 /* Disable breakpoints on all catch clauses described in ARGS. */
6496 disable_catch (char *args)
6498 /* Map the disable command to catch clauses described in ARGS. */
6501 /* Enable breakpoints on all catch clauses described in ARGS. */
6503 enable_catch (char *args)
6505 /* Map the disable command to catch clauses described in ARGS. */
6508 /* Delete breakpoints on all catch clauses in the active scope. */
6510 delete_catch (char *args)
6512 /* Map the delete command to catch clauses described in ARGS. */
6517 catch_command (char *arg, int from_tty)
6519 catch_command_1 (arg, 0, from_tty);
6524 tcatch_command (char *arg, int from_tty)
6526 catch_command_1 (arg, 1, from_tty);
6529 /* Delete breakpoints by address or line. */
6532 clear_command (char *arg, int from_tty)
6534 struct breakpoint *b, *tmp, *prev, *found;
6536 struct symtabs_and_lines sals;
6537 struct symtab_and_line sal;
6542 sals = decode_line_spec (arg, 1);
6547 sals.sals = (struct symtab_and_line *)
6548 xmalloc (sizeof (struct symtab_and_line));
6549 make_cleanup (xfree, sals.sals);
6550 init_sal (&sal); /* initialize to zeroes */
6551 sal.line = default_breakpoint_line;
6552 sal.symtab = default_breakpoint_symtab;
6553 sal.pc = default_breakpoint_address;
6554 if (sal.symtab == 0)
6555 error ("No source file specified.");
6563 /* For each line spec given, delete bps which correspond
6564 to it. Do it in two passes, solely to preserve the current
6565 behavior that from_tty is forced true if we delete more than
6569 for (i = 0; i < sals.nelts; i++)
6571 /* If exact pc given, clear bpts at that pc.
6572 If line given (pc == 0), clear all bpts on specified line.
6573 If defaulting, clear all bpts on default line
6576 defaulting sal.pc != 0 tests to do
6581 1 0 <can't happen> */
6586 /* Find all matching breakpoints, remove them from the
6587 breakpoint chain, and add them to the 'found' chain. */
6588 ALL_BREAKPOINTS_SAFE (b, tmp)
6590 /* Are we going to delete b? */
6591 if (b->type != bp_none
6592 && b->type != bp_watchpoint
6593 && b->type != bp_hardware_watchpoint
6594 && b->type != bp_read_watchpoint
6595 && b->type != bp_access_watchpoint
6596 /* Not if b is a watchpoint of any sort... */
6597 && (((sal.pc && (b->loc->address == sal.pc))
6598 && (!section_is_overlay (b->loc->section)
6599 || b->loc->section == sal.section))
6600 /* Yes, if sal.pc matches b (modulo overlays). */
6601 || ((default_match || (0 == sal.pc))
6602 && b->source_file != NULL
6603 && sal.symtab != NULL
6604 && STREQ (b->source_file, sal.symtab->filename)
6605 && b->line_number == sal.line)))
6606 /* Yes, if sal source file and line matches b. */
6608 /* Remove it from breakpoint_chain... */
6609 if (b == breakpoint_chain)
6611 /* b is at the head of the list */
6612 breakpoint_chain = b->next;
6616 prev->next = b->next;
6618 /* And add it to 'found' chain. */
6624 /* Keep b, and keep a pointer to it. */
6629 /* Now go thru the 'found' chain and delete them. */
6633 error ("No breakpoint at %s.", arg);
6635 error ("No breakpoint at this line.");
6639 from_tty = 1; /* Always report if deleted more than one */
6641 printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : "");
6642 breakpoints_changed ();
6646 printf_unfiltered ("%d ", found->number);
6648 delete_breakpoint (found);
6652 putchar_unfiltered ('\n');
6655 /* Delete breakpoint in BS if they are `delete' breakpoints and
6656 all breakpoints that are marked for deletion, whether hit or not.
6657 This is called after any breakpoint is hit, or after errors. */
6660 breakpoint_auto_delete (bpstat bs)
6662 struct breakpoint *b, *temp;
6664 for (; bs; bs = bs->next)
6665 if (bs->breakpoint_at && bs->breakpoint_at->disposition == disp_del
6667 delete_breakpoint (bs->breakpoint_at);
6669 ALL_BREAKPOINTS_SAFE (b, temp)
6671 if (b->disposition == disp_del_at_next_stop)
6672 delete_breakpoint (b);
6676 /* Delete a breakpoint and clean up all traces of it in the data
6680 delete_breakpoint (struct breakpoint *bpt)
6682 struct breakpoint *b;
6684 struct bp_location *loc;
6687 error ("Internal error (attempted to delete a NULL breakpoint)");
6690 /* Has this bp already been deleted? This can happen because multiple
6691 lists can hold pointers to bp's. bpstat lists are especial culprits.
6693 One example of this happening is a watchpoint's scope bp. When the
6694 scope bp triggers, we notice that the watchpoint is out of scope, and
6695 delete it. We also delete its scope bp. But the scope bp is marked
6696 "auto-deleting", and is already on a bpstat. That bpstat is then
6697 checked for auto-deleting bp's, which are deleted.
6699 A real solution to this problem might involve reference counts in bp's,
6700 and/or giving them pointers back to their referencing bpstat's, and
6701 teaching delete_breakpoint to only free a bp's storage when no more
6702 references were extent. A cheaper bandaid was chosen. */
6703 if (bpt->type == bp_none)
6706 if (delete_breakpoint_hook)
6707 delete_breakpoint_hook (bpt);
6708 breakpoint_delete_event (bpt->number);
6710 if (bpt->loc->inserted)
6711 remove_breakpoint (bpt, mark_inserted);
6713 if (breakpoint_chain == bpt)
6714 breakpoint_chain = bpt->next;
6716 if (bp_location_chain == bpt->loc)
6717 bp_location_chain = bpt->loc->next;
6719 /* If we have callback-style exception catchpoints, don't go through
6720 the adjustments to the C++ runtime library etc. if the inferior
6721 isn't actually running. target_enable_exception_callback for a
6722 null target ops vector gives an undesirable error message, so we
6723 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6724 exceptions are supported in this way, it's OK for now. FIXME */
6725 if (ep_is_exception_catchpoint (bpt) && target_has_execution)
6727 /* Format possible error msg */
6728 char *message = xstrprintf ("Error in deleting catchpoint %d:\n",
6730 struct cleanup *cleanups = make_cleanup (xfree, message);
6731 args_for_catchpoint_enable args;
6732 args.kind = bpt->type == bp_catch_catch ?
6733 EX_EVENT_CATCH : EX_EVENT_THROW;
6735 catch_errors (cover_target_enable_exception_callback, &args,
6736 message, RETURN_MASK_ALL);
6737 do_cleanups (cleanups);
6744 b->next = bpt->next;
6748 ALL_BP_LOCATIONS (loc)
6749 if (loc->next == bpt->loc)
6751 loc->next = bpt->loc->next;
6755 check_duplicates (bpt);
6756 /* If this breakpoint was inserted, and there is another breakpoint
6757 at the same address, we need to insert the other breakpoint. */
6758 if (bpt->loc->inserted
6759 && bpt->type != bp_hardware_watchpoint
6760 && bpt->type != bp_read_watchpoint
6761 && bpt->type != bp_access_watchpoint
6762 && bpt->type != bp_catch_fork
6763 && bpt->type != bp_catch_vfork
6764 && bpt->type != bp_catch_exec)
6767 if (b->loc->address == bpt->loc->address
6768 && b->loc->section == bpt->loc->section
6769 && !b->loc->duplicate
6770 && b->enable_state != bp_disabled
6771 && b->enable_state != bp_shlib_disabled
6772 && b->enable_state != bp_call_disabled)
6776 /* We should never reach this point if there is a permanent
6777 breakpoint at the same address as the one being deleted.
6778 If there is a permanent breakpoint somewhere, it should
6779 always be the only one inserted. */
6780 if (b->enable_state == bp_permanent)
6781 internal_error (__FILE__, __LINE__,
6782 "another breakpoint was inserted on top of "
6783 "a permanent breakpoint");
6785 if (b->type == bp_hardware_breakpoint)
6786 val = target_insert_hw_breakpoint (b->loc->address, b->loc->shadow_contents);
6788 val = target_insert_breakpoint (b->loc->address, b->loc->shadow_contents);
6790 /* If there was an error in the insert, print a message, then stop execution. */
6793 struct ui_file *tmp_error_stream = mem_fileopen ();
6794 make_cleanup_ui_file_delete (tmp_error_stream);
6797 if (b->type == bp_hardware_breakpoint)
6799 fprintf_unfiltered (tmp_error_stream,
6800 "Cannot insert hardware breakpoint %d.\n"
6801 "You may have requested too many hardware breakpoints.\n",
6806 fprintf_unfiltered (tmp_error_stream, "Cannot insert breakpoint %d.\n", b->number);
6807 fprintf_filtered (tmp_error_stream, "Error accessing memory address ");
6808 print_address_numeric (b->loc->address, 1, tmp_error_stream);
6809 fprintf_filtered (tmp_error_stream, ": %s.\n",
6810 safe_strerror (val));
6813 fprintf_unfiltered (tmp_error_stream,"The same program may be running in another process.");
6814 target_terminal_ours_for_output ();
6815 error_stream(tmp_error_stream);
6818 b->loc->inserted = 1;
6822 free_command_lines (&bpt->commands);
6825 if (bpt->cond_string != NULL)
6826 xfree (bpt->cond_string);
6827 if (bpt->addr_string != NULL)
6828 xfree (bpt->addr_string);
6829 if (bpt->exp != NULL)
6831 if (bpt->exp_string != NULL)
6832 xfree (bpt->exp_string);
6833 if (bpt->val != NULL)
6834 value_free (bpt->val);
6835 if (bpt->source_file != NULL)
6836 xfree (bpt->source_file);
6837 if (bpt->dll_pathname != NULL)
6838 xfree (bpt->dll_pathname);
6839 if (bpt->triggered_dll_pathname != NULL)
6840 xfree (bpt->triggered_dll_pathname);
6841 if (bpt->exec_pathname != NULL)
6842 xfree (bpt->exec_pathname);
6844 /* Be sure no bpstat's are pointing at it after it's been freed. */
6845 /* FIXME, how can we find all bpstat's?
6846 We just check stop_bpstat for now. */
6847 for (bs = stop_bpstat; bs; bs = bs->next)
6848 if (bs->breakpoint_at == bpt)
6850 bs->breakpoint_at = NULL;
6852 /* bs->commands will be freed later. */
6854 /* On the chance that someone will soon try again to delete this same
6855 bp, we mark it as deleted before freeing its storage. */
6856 bpt->type = bp_none;
6863 do_delete_breakpoint_cleanup (void *b)
6865 delete_breakpoint (b);
6869 make_cleanup_delete_breakpoint (struct breakpoint *b)
6871 return make_cleanup (do_delete_breakpoint_cleanup, b);
6875 make_exec_cleanup_delete_breakpoint (struct breakpoint *b)
6877 return make_exec_cleanup (do_delete_breakpoint_cleanup, b);
6881 delete_command (char *arg, int from_tty)
6883 struct breakpoint *b, *temp;
6889 int breaks_to_delete = 0;
6891 /* Delete all breakpoints if no argument.
6892 Do not delete internal or call-dummy breakpoints, these
6893 have to be deleted with an explicit breakpoint number argument. */
6896 if (b->type != bp_call_dummy &&
6897 b->type != bp_shlib_event &&
6898 b->type != bp_thread_event &&
6899 b->type != bp_overlay_event &&
6901 breaks_to_delete = 1;
6904 /* Ask user only if there are some breakpoints to delete. */
6906 || (breaks_to_delete && query ("Delete all breakpoints? ")))
6908 ALL_BREAKPOINTS_SAFE (b, temp)
6910 if (b->type != bp_call_dummy &&
6911 b->type != bp_shlib_event &&
6912 b->type != bp_thread_event &&
6913 b->type != bp_overlay_event &&
6915 delete_breakpoint (b);
6920 map_breakpoint_numbers (arg, delete_breakpoint);
6923 /* Reset a breakpoint given it's struct breakpoint * BINT.
6924 The value we return ends up being the return value from catch_errors.
6925 Unused in this case. */
6928 breakpoint_re_set_one (void *bint)
6930 /* get past catch_errs */
6931 struct breakpoint *b = (struct breakpoint *) bint;
6934 struct symtabs_and_lines sals;
6936 enum enable_state save_enable;
6941 warning ("attempted to reset apparently deleted breakpoint #%d?",
6945 case bp_hardware_breakpoint:
6947 case bp_catch_unload:
6948 if (b->addr_string == NULL)
6950 /* Anything without a string can't be re-set. */
6951 delete_breakpoint (b);
6954 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6956 ``And a hack it is, although Apple's Darwin version of GDB
6957 contains an almost identical hack to implement a "future
6958 break" command. It seems to work in many real world cases,
6959 but it is easy to come up with a test case where the patch
6960 doesn't help at all.''
6962 ``It seems that the way GDB implements breakpoints - in -
6963 shared - libraries was designed for a.out shared library
6964 systems (SunOS 4) where shared libraries were loaded at a
6965 fixed address in memory. Since ELF shared libraries can (and
6966 will) be loaded at any address in memory, things break.
6967 Fixing this is not trivial. Therefore, I'm not sure whether
6968 we should add this hack to the branch only. I cannot
6969 guarantee that things will be fixed on the trunk in the near
6972 In case we have a problem, disable this breakpoint. We'll
6973 restore its status if we succeed. Don't disable a
6974 shlib_disabled breakpoint though. There's a fair chance we
6975 can't re-set it if the shared library it's in hasn't been
6977 save_enable = b->enable_state;
6978 if (b->enable_state != bp_shlib_disabled)
6979 b->enable_state = bp_disabled;
6981 set_language (b->language);
6982 input_radix = b->input_radix;
6984 sals = decode_line_1 (&s, 1, (struct symtab *) NULL, 0, (char ***) NULL);
6985 for (i = 0; i < sals.nelts; i++)
6987 resolve_sal_pc (&sals.sals[i]);
6989 /* Reparse conditions, they might contain references to the
6991 if (b->cond_string != NULL)
6996 b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0);
6999 /* We need to re-set the breakpoint if the address changes... */
7000 if (b->loc->address != sals.sals[i].pc
7001 /* ...or new and old breakpoints both have source files, and
7002 the source file name or the line number changes... */
7003 || (b->source_file != NULL
7004 && sals.sals[i].symtab != NULL
7005 && (!STREQ (b->source_file, sals.sals[i].symtab->filename)
7006 || b->line_number != sals.sals[i].line)
7008 /* ...or we switch between having a source file and not having
7010 || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL))
7013 if (b->source_file != NULL)
7014 xfree (b->source_file);
7015 if (sals.sals[i].symtab == NULL)
7016 b->source_file = NULL;
7019 savestring (sals.sals[i].symtab->filename,
7020 strlen (sals.sals[i].symtab->filename));
7021 b->line_number = sals.sals[i].line;
7022 b->loc->requested_address = sals.sals[i].pc;
7024 = adjust_breakpoint_address (b->loc->requested_address);
7026 /* Used to check for duplicates here, but that can
7027 cause trouble, as it doesn't check for disabled
7032 /* Might be better to do this just once per breakpoint_re_set,
7033 rather than once for every breakpoint. */
7034 breakpoints_changed ();
7036 b->loc->section = sals.sals[i].section;
7037 b->enable_state = save_enable; /* Restore it, this worked. */
7040 /* Now that this is re-enabled, check_duplicates
7042 check_duplicates (b);
7049 case bp_hardware_watchpoint:
7050 case bp_read_watchpoint:
7051 case bp_access_watchpoint:
7052 innermost_block = NULL;
7053 /* The issue arises of what context to evaluate this in. The
7054 same one as when it was set, but what does that mean when
7055 symbols have been re-read? We could save the filename and
7056 functionname, but if the context is more local than that, the
7057 best we could do would be something like how many levels deep
7058 and which index at that particular level, but that's going to
7059 be less stable than filenames or function names. */
7061 /* So for now, just use a global context. */
7064 b->exp = parse_expression (b->exp_string);
7065 b->exp_valid_block = innermost_block;
7066 mark = value_mark ();
7068 value_free (b->val);
7069 b->val = evaluate_expression (b->exp);
7070 release_value (b->val);
7071 if (VALUE_LAZY (b->val) && b->enable_state == bp_enabled)
7072 value_fetch_lazy (b->val);
7074 if (b->cond_string != NULL)
7079 b->cond = parse_exp_1 (&s, (struct block *) 0, 0);
7081 if (b->enable_state == bp_enabled)
7083 value_free_to_mark (mark);
7085 case bp_catch_catch:
7086 case bp_catch_throw:
7088 /* We needn't really do anything to reset these, since the mask
7089 that requests them is unaffected by e.g., new libraries being
7092 case bp_catch_vfork:
7097 printf_filtered ("Deleting unknown breakpoint type %d\n", b->type);
7099 /* Delete longjmp and overlay event breakpoints; they will be
7100 reset later by breakpoint_re_set. */
7102 case bp_longjmp_resume:
7103 case bp_overlay_event:
7104 delete_breakpoint (b);
7107 /* This breakpoint is special, it's set up when the inferior
7108 starts and we really don't want to touch it. */
7109 case bp_shlib_event:
7111 /* Like bp_shlib_event, this breakpoint type is special.
7112 Once it is set up, we do not want to touch it. */
7113 case bp_thread_event:
7115 /* Keep temporary breakpoints, which can be encountered when we step
7116 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7117 Otherwise these should have been blown away via the cleanup chain
7118 or by breakpoint_init_inferior when we rerun the executable. */
7121 case bp_watchpoint_scope:
7123 case bp_step_resume:
7130 /* Re-set all breakpoints after symbols have been re-loaded. */
7132 breakpoint_re_set (void)
7134 struct breakpoint *b, *temp;
7135 enum language save_language;
7136 int save_input_radix;
7138 save_language = current_language->la_language;
7139 save_input_radix = input_radix;
7140 ALL_BREAKPOINTS_SAFE (b, temp)
7142 /* Format possible error msg */
7143 char *message = xstrprintf ("Error in re-setting breakpoint %d:\n",
7145 struct cleanup *cleanups = make_cleanup (xfree, message);
7146 catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL);
7147 do_cleanups (cleanups);
7149 set_language (save_language);
7150 input_radix = save_input_radix;
7152 if (GET_LONGJMP_TARGET_P ())
7154 create_longjmp_breakpoint ("longjmp");
7155 create_longjmp_breakpoint ("_longjmp");
7156 create_longjmp_breakpoint ("siglongjmp");
7157 create_longjmp_breakpoint ("_siglongjmp");
7158 create_longjmp_breakpoint (NULL);
7161 create_overlay_event_breakpoint ("_ovly_debug_event");
7164 /* Reset the thread number of this breakpoint:
7166 - If the breakpoint is for all threads, leave it as-is.
7167 - Else, reset it to the current thread for inferior_ptid. */
7169 breakpoint_re_set_thread (struct breakpoint *b)
7171 if (b->thread != -1)
7173 if (in_thread_list (inferior_ptid))
7174 b->thread = pid_to_thread_id (inferior_ptid);
7178 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7179 If from_tty is nonzero, it prints a message to that effect,
7180 which ends with a period (no newline). */
7183 set_ignore_count (int bptnum, int count, int from_tty)
7185 struct breakpoint *b;
7191 if (b->number == bptnum)
7193 b->ignore_count = count;
7197 printf_filtered ("Will stop next time breakpoint %d is reached.",
7199 else if (count == 1)
7200 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7203 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7206 breakpoints_changed ();
7207 breakpoint_modify_event (b->number);
7211 error ("No breakpoint number %d.", bptnum);
7214 /* Clear the ignore counts of all breakpoints. */
7216 breakpoint_clear_ignore_counts (void)
7218 struct breakpoint *b;
7221 b->ignore_count = 0;
7224 /* Command to set ignore-count of breakpoint N to COUNT. */
7227 ignore_command (char *args, int from_tty)
7233 error_no_arg ("a breakpoint number");
7235 num = get_number (&p);
7237 error ("bad breakpoint number: '%s'", args);
7239 error ("Second argument (specified ignore-count) is missing.");
7241 set_ignore_count (num,
7242 longest_to_int (value_as_long (parse_and_eval (p))),
7245 printf_filtered ("\n");
7248 /* Call FUNCTION on each of the breakpoints
7249 whose numbers are given in ARGS. */
7252 map_breakpoint_numbers (char *args, void (*function) (struct breakpoint *))
7257 struct breakpoint *b, *tmp;
7261 error_no_arg ("one or more breakpoint numbers");
7268 num = get_number_or_range (&p1);
7271 warning ("bad breakpoint number at or near '%s'", p);
7275 ALL_BREAKPOINTS_SAFE (b, tmp)
7276 if (b->number == num)
7278 struct breakpoint *related_breakpoint = b->related_breakpoint;
7281 if (related_breakpoint)
7282 function (related_breakpoint);
7286 printf_unfiltered ("No breakpoint number %d.\n", num);
7292 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7293 If from_tty is nonzero, it prints a message to that effect,
7294 which ends with a period (no newline). */
7297 disable_breakpoint (struct breakpoint *bpt)
7299 /* Never disable a watchpoint scope breakpoint; we want to
7300 hit them when we leave scope so we can delete both the
7301 watchpoint and its scope breakpoint at that time. */
7302 if (bpt->type == bp_watchpoint_scope)
7305 /* You can't disable permanent breakpoints. */
7306 if (bpt->enable_state == bp_permanent)
7309 bpt->enable_state = bp_disabled;
7311 check_duplicates (bpt);
7313 if (modify_breakpoint_hook)
7314 modify_breakpoint_hook (bpt);
7315 breakpoint_modify_event (bpt->number);
7319 disable_command (char *args, int from_tty)
7321 struct breakpoint *bpt;
7323 ALL_BREAKPOINTS (bpt)
7327 warning ("attempted to disable apparently deleted breakpoint #%d?",
7332 case bp_catch_unload:
7334 case bp_catch_vfork:
7336 case bp_catch_catch:
7337 case bp_catch_throw:
7338 case bp_hardware_breakpoint:
7340 case bp_hardware_watchpoint:
7341 case bp_read_watchpoint:
7342 case bp_access_watchpoint:
7343 disable_breakpoint (bpt);
7348 map_breakpoint_numbers (args, disable_breakpoint);
7352 do_enable_breakpoint (struct breakpoint *bpt, enum bpdisp disposition)
7354 struct frame_info *save_selected_frame = NULL;
7355 int save_selected_frame_level = -1;
7356 int target_resources_ok, other_type_used;
7359 if (bpt->type == bp_hardware_breakpoint)
7362 i = hw_breakpoint_used_count ();
7363 target_resources_ok =
7364 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,
7366 if (target_resources_ok == 0)
7367 error ("No hardware breakpoint support in the target.");
7368 else if (target_resources_ok < 0)
7369 error ("Hardware breakpoints used exceeds limit.");
7372 if (bpt->enable_state != bp_permanent)
7373 bpt->enable_state = bp_enabled;
7374 bpt->disposition = disposition;
7375 check_duplicates (bpt);
7376 breakpoints_changed ();
7378 if (bpt->type == bp_watchpoint ||
7379 bpt->type == bp_hardware_watchpoint ||
7380 bpt->type == bp_read_watchpoint ||
7381 bpt->type == bp_access_watchpoint)
7383 if (bpt->exp_valid_block != NULL)
7385 struct frame_info *fr =
7386 fr = frame_find_by_id (bpt->watchpoint_frame);
7390 Cannot enable watchpoint %d because the block in which its expression\n\
7391 is valid is not currently in scope.\n", bpt->number);
7392 bpt->enable_state = bp_disabled;
7396 save_selected_frame = deprecated_selected_frame;
7397 save_selected_frame_level = frame_relative_level (deprecated_selected_frame);
7401 value_free (bpt->val);
7402 mark = value_mark ();
7403 bpt->val = evaluate_expression (bpt->exp);
7404 release_value (bpt->val);
7405 if (VALUE_LAZY (bpt->val))
7406 value_fetch_lazy (bpt->val);
7408 if (bpt->type == bp_hardware_watchpoint ||
7409 bpt->type == bp_read_watchpoint ||
7410 bpt->type == bp_access_watchpoint)
7412 int i = hw_watchpoint_used_count (bpt->type, &other_type_used);
7413 int mem_cnt = can_use_hardware_watchpoint (bpt->val);
7415 /* Hack around 'unused var' error for some targets here */
7417 target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7418 bpt->type, i + mem_cnt, other_type_used);
7419 /* we can consider of type is bp_hardware_watchpoint, convert to
7420 bp_watchpoint in the following condition */
7421 if (target_resources_ok < 0)
7424 Cannot enable watchpoint %d because target watch resources\n\
7425 have been allocated for other watchpoints.\n", bpt->number);
7426 bpt->enable_state = bp_disabled;
7427 value_free_to_mark (mark);
7432 if (save_selected_frame_level >= 0)
7433 select_frame (save_selected_frame);
7434 value_free_to_mark (mark);
7436 if (modify_breakpoint_hook)
7437 modify_breakpoint_hook (bpt);
7438 breakpoint_modify_event (bpt->number);
7442 enable_breakpoint (struct breakpoint *bpt)
7444 do_enable_breakpoint (bpt, bpt->disposition);
7447 /* The enable command enables the specified breakpoints (or all defined
7448 breakpoints) so they once again become (or continue to be) effective
7449 in stopping the inferior. */
7452 enable_command (char *args, int from_tty)
7454 struct breakpoint *bpt;
7456 ALL_BREAKPOINTS (bpt)
7460 warning ("attempted to enable apparently deleted breakpoint #%d?",
7465 case bp_catch_unload:
7467 case bp_catch_vfork:
7469 case bp_catch_catch:
7470 case bp_catch_throw:
7471 case bp_hardware_breakpoint:
7473 case bp_hardware_watchpoint:
7474 case bp_read_watchpoint:
7475 case bp_access_watchpoint:
7476 enable_breakpoint (bpt);
7481 map_breakpoint_numbers (args, enable_breakpoint);
7485 enable_once_breakpoint (struct breakpoint *bpt)
7487 do_enable_breakpoint (bpt, disp_disable);
7491 enable_once_command (char *args, int from_tty)
7493 map_breakpoint_numbers (args, enable_once_breakpoint);
7497 enable_delete_breakpoint (struct breakpoint *bpt)
7499 do_enable_breakpoint (bpt, disp_del);
7503 enable_delete_command (char *args, int from_tty)
7505 map_breakpoint_numbers (args, enable_delete_breakpoint);
7508 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7510 struct symtabs_and_lines
7511 decode_line_spec_1 (char *string, int funfirstline)
7513 struct symtabs_and_lines sals;
7515 error ("Empty line specification.");
7516 if (default_breakpoint_valid)
7517 sals = decode_line_1 (&string, funfirstline,
7518 default_breakpoint_symtab,
7519 default_breakpoint_line,
7522 sals = decode_line_1 (&string, funfirstline,
7523 (struct symtab *) NULL, 0, (char ***) NULL);
7525 error ("Junk at end of line specification: %s", string);
7530 _initialize_breakpoint (void)
7532 struct cmd_list_element *c;
7534 breakpoint_chain = 0;
7535 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7536 before a breakpoint is set. */
7537 breakpoint_count = 0;
7539 add_com ("ignore", class_breakpoint, ignore_command,
7540 "Set ignore-count of breakpoint number N to COUNT.\n\
7541 Usage is `ignore N COUNT'.");
7543 add_com_alias ("bc", "ignore", class_breakpoint, 1);
7545 add_com ("commands", class_breakpoint, commands_command,
7546 "Set commands to be executed when a breakpoint is hit.\n\
7547 Give breakpoint number as argument after \"commands\".\n\
7548 With no argument, the targeted breakpoint is the last one set.\n\
7549 The commands themselves follow starting on the next line.\n\
7550 Type a line containing \"end\" to indicate the end of them.\n\
7551 Give \"silent\" as the first line to make the breakpoint silent;\n\
7552 then no output is printed when it is hit, except what the commands print.");
7554 add_com ("condition", class_breakpoint, condition_command,
7555 "Specify breakpoint number N to break only if COND is true.\n\
7556 Usage is `condition N COND', where N is an integer and COND is an\n\
7557 expression to be evaluated whenever breakpoint N is reached.");
7559 c = add_com ("tbreak", class_breakpoint, tbreak_command,
7560 "Set a temporary breakpoint. Args like \"break\" command.\n\
7561 Like \"break\" except the breakpoint is only temporary,\n\
7562 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7563 by using \"enable delete\" on the breakpoint number.");
7564 set_cmd_completer (c, location_completer);
7566 c = add_com ("hbreak", class_breakpoint, hbreak_command,
7567 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7568 Like \"break\" except the breakpoint requires hardware support,\n\
7569 some target hardware may not have this support.");
7570 set_cmd_completer (c, location_completer);
7572 c = add_com ("thbreak", class_breakpoint, thbreak_command,
7573 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7574 Like \"hbreak\" except the breakpoint is only temporary,\n\
7575 so it will be deleted when hit.");
7576 set_cmd_completer (c, location_completer);
7578 add_prefix_cmd ("enable", class_breakpoint, enable_command,
7579 "Enable some breakpoints.\n\
7580 Give breakpoint numbers (separated by spaces) as arguments.\n\
7581 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7582 This is used to cancel the effect of the \"disable\" command.\n\
7583 With a subcommand you can enable temporarily.",
7584 &enablelist, "enable ", 1, &cmdlist);
7586 add_com ("ab", class_breakpoint, enable_command,
7587 "Enable some breakpoints.\n\
7588 Give breakpoint numbers (separated by spaces) as arguments.\n\
7589 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7590 This is used to cancel the effect of the \"disable\" command.\n\
7591 With a subcommand you can enable temporarily.");
7593 add_com_alias ("en", "enable", class_breakpoint, 1);
7595 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command,
7596 "Enable some breakpoints.\n\
7597 Give breakpoint numbers (separated by spaces) as arguments.\n\
7598 This is used to cancel the effect of the \"disable\" command.\n\
7599 May be abbreviated to simply \"enable\".\n",
7600 &enablebreaklist, "enable breakpoints ", 1, &enablelist);
7602 add_cmd ("once", no_class, enable_once_command,
7603 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7604 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7607 add_cmd ("delete", no_class, enable_delete_command,
7608 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7609 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7612 add_cmd ("delete", no_class, enable_delete_command,
7613 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7614 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7617 add_cmd ("once", no_class, enable_once_command,
7618 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7619 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7622 add_prefix_cmd ("disable", class_breakpoint, disable_command,
7623 "Disable some breakpoints.\n\
7624 Arguments are breakpoint numbers with spaces in between.\n\
7625 To disable all breakpoints, give no argument.\n\
7626 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7627 &disablelist, "disable ", 1, &cmdlist);
7628 add_com_alias ("dis", "disable", class_breakpoint, 1);
7629 add_com_alias ("disa", "disable", class_breakpoint, 1);
7631 add_com ("sb", class_breakpoint, disable_command,
7632 "Disable some breakpoints.\n\
7633 Arguments are breakpoint numbers with spaces in between.\n\
7634 To disable all breakpoints, give no argument.\n\
7635 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7637 add_cmd ("breakpoints", class_alias, disable_command,
7638 "Disable some breakpoints.\n\
7639 Arguments are breakpoint numbers with spaces in between.\n\
7640 To disable all breakpoints, give no argument.\n\
7641 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7642 This command may be abbreviated \"disable\".",
7645 add_prefix_cmd ("delete", class_breakpoint, delete_command,
7646 "Delete some breakpoints or auto-display expressions.\n\
7647 Arguments are breakpoint numbers with spaces in between.\n\
7648 To delete all breakpoints, give no argument.\n\
7650 Also a prefix command for deletion of other GDB objects.\n\
7651 The \"unset\" command is also an alias for \"delete\".",
7652 &deletelist, "delete ", 1, &cmdlist);
7653 add_com_alias ("d", "delete", class_breakpoint, 1);
7655 add_com ("db", class_breakpoint, delete_command,
7656 "Delete some breakpoints.\n\
7657 Arguments are breakpoint numbers with spaces in between.\n\
7658 To delete all breakpoints, give no argument.\n");
7660 add_cmd ("breakpoints", class_alias, delete_command,
7661 "Delete some breakpoints or auto-display expressions.\n\
7662 Arguments are breakpoint numbers with spaces in between.\n\
7663 To delete all breakpoints, give no argument.\n\
7664 This command may be abbreviated \"delete\".",
7667 add_com ("clear", class_breakpoint, clear_command,
7668 concat ("Clear breakpoint at specified line or function.\n\
7669 Argument may be line number, function name, or \"*\" and an address.\n\
7670 If line number is specified, all breakpoints in that line are cleared.\n\
7671 If function is specified, breakpoints at beginning of function are cleared.\n\
7672 If an address is specified, breakpoints at that address are cleared.\n\n",
7673 "With no argument, clears all breakpoints in the line that the selected frame\n\
7676 See also the \"delete\" command which clears breakpoints by number.", NULL));
7678 c = add_com ("break", class_breakpoint, break_command,
7679 concat ("Set breakpoint at specified line or function.\n\
7680 Argument may be line number, function name, or \"*\" and an address.\n\
7681 If line number is specified, break at start of code for that line.\n\
7682 If function is specified, break at start of code for that function.\n\
7683 If an address is specified, break at that exact address.\n",
7684 "With no arg, uses current execution address of selected stack frame.\n\
7685 This is useful for breaking on return to a stack frame.\n\
7687 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7689 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL));
7690 set_cmd_completer (c, location_completer);
7692 add_com_alias ("b", "break", class_run, 1);
7693 add_com_alias ("br", "break", class_run, 1);
7694 add_com_alias ("bre", "break", class_run, 1);
7695 add_com_alias ("brea", "break", class_run, 1);
7699 add_com_alias ("ba", "break", class_breakpoint, 1);
7700 add_com_alias ("bu", "ubreak", class_breakpoint, 1);
7705 add_abbrev_prefix_cmd ("stop", class_breakpoint, stop_command,
7706 "Break in function/address or break at a line in the current file.",
7707 &stoplist, "stop ", 1, &cmdlist);
7708 add_cmd ("in", class_breakpoint, stopin_command,
7709 "Break in function or address.\n", &stoplist);
7710 add_cmd ("at", class_breakpoint, stopat_command,
7711 "Break at a line in the current file.\n", &stoplist);
7712 add_com ("status", class_info, breakpoints_info,
7713 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7714 The \"Type\" column indicates one of:\n\
7715 \tbreakpoint - normal breakpoint\n\
7716 \twatchpoint - watchpoint\n\
7717 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7718 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7719 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7720 address and file/line number respectively.\n\n",
7721 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7722 are set to the address of the last breakpoint listed.\n\n\
7723 Convenience variable \"$bpnum\" contains the number of the last\n\
7724 breakpoint set.", NULL));
7727 add_info ("breakpoints", breakpoints_info,
7728 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7729 The \"Type\" column indicates one of:\n\
7730 \tbreakpoint - normal breakpoint\n\
7731 \twatchpoint - watchpoint\n\
7732 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7733 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7734 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7735 address and file/line number respectively.\n\n",
7736 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7737 are set to the address of the last breakpoint listed.\n\n\
7738 Convenience variable \"$bpnum\" contains the number of the last\n\
7739 breakpoint set.", NULL));
7742 add_com ("lb", class_breakpoint, breakpoints_info,
7743 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7744 The \"Type\" column indicates one of:\n\
7745 \tbreakpoint - normal breakpoint\n\
7746 \twatchpoint - watchpoint\n\
7747 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7748 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7749 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7750 address and file/line number respectively.\n\n",
7751 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7752 are set to the address of the last breakpoint listed.\n\n\
7753 Convenience variable \"$bpnum\" contains the number of the last\n\
7754 breakpoint set.", NULL));
7756 add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints,
7757 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7758 The \"Type\" column indicates one of:\n\
7759 \tbreakpoint - normal breakpoint\n\
7760 \twatchpoint - watchpoint\n\
7761 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7762 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7763 \tuntil - internal breakpoint used by the \"until\" command\n\
7764 \tfinish - internal breakpoint used by the \"finish\" command\n",
7765 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7766 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7767 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7768 address and file/line number respectively.\n\n",
7769 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7770 are set to the address of the last breakpoint listed.\n\n\
7771 Convenience variable \"$bpnum\" contains the number of the last\n\
7772 breakpoint set.", NULL),
7773 &maintenanceinfolist);
7775 add_com ("catch", class_breakpoint, catch_command,
7776 "Set catchpoints to catch events.\n\
7777 Raised signals may be caught:\n\
7778 \tcatch signal - all signals\n\
7779 \tcatch signal <signame> - a particular signal\n\
7780 Raised exceptions may be caught:\n\
7781 \tcatch throw - all exceptions, when thrown\n\
7782 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7783 \tcatch catch - all exceptions, when caught\n\
7784 \tcatch catch <exceptname> - a particular exception, when caught\n\
7785 Thread or process events may be caught:\n\
7786 \tcatch thread_start - any threads, just after creation\n\
7787 \tcatch thread_exit - any threads, just before expiration\n\
7788 \tcatch thread_join - any threads, just after joins\n\
7789 Process events may be caught:\n\
7790 \tcatch start - any processes, just after creation\n\
7791 \tcatch exit - any processes, just before expiration\n\
7792 \tcatch fork - calls to fork()\n\
7793 \tcatch vfork - calls to vfork()\n\
7794 \tcatch exec - calls to exec()\n\
7795 Dynamically-linked library events may be caught:\n\
7796 \tcatch load - loads of any library\n\
7797 \tcatch load <libname> - loads of a particular library\n\
7798 \tcatch unload - unloads of any library\n\
7799 \tcatch unload <libname> - unloads of a particular library\n\
7800 The act of your program's execution stopping may also be caught:\n\
7802 C++ exceptions may be caught:\n\
7803 \tcatch throw - all exceptions, when thrown\n\
7804 \tcatch catch - all exceptions, when caught\n\
7806 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7807 after a fork or vfork is caught.\n\n\
7808 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7810 add_com ("tcatch", class_breakpoint, tcatch_command,
7811 "Set temporary catchpoints to catch events.\n\
7812 Args like \"catch\" command.\n\
7813 Like \"catch\" except the catchpoint is only temporary,\n\
7814 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7815 by using \"enable delete\" on the catchpoint number.");
7817 c = add_com ("watch", class_breakpoint, watch_command,
7818 "Set a watchpoint for an expression.\n\
7819 A watchpoint stops execution of your program whenever the value of\n\
7820 an expression changes.");
7821 set_cmd_completer (c, location_completer);
7823 c = add_com ("rwatch", class_breakpoint, rwatch_command,
7824 "Set a read watchpoint for an expression.\n\
7825 A watchpoint stops execution of your program whenever the value of\n\
7826 an expression is read.");
7827 set_cmd_completer (c, location_completer);
7829 c = add_com ("awatch", class_breakpoint, awatch_command,
7830 "Set a watchpoint for an expression.\n\
7831 A watchpoint stops execution of your program whenever the value of\n\
7832 an expression is either read or written.");
7833 set_cmd_completer (c, location_completer);
7835 add_info ("watchpoints", breakpoints_info,
7836 "Synonym for ``info breakpoints''.");
7839 c = add_set_cmd ("can-use-hw-watchpoints", class_support, var_zinteger,
7840 (char *) &can_use_hw_watchpoints,
7841 "Set debugger's willingness to use watchpoint hardware.\n\
7842 If zero, gdb will not use hardware for new watchpoints, even if\n\
7843 such is available. (However, any hardware watchpoints that were\n\
7844 created before setting this to nonzero, will continue to use watchpoint\n\
7847 add_show_from_set (c, &showlist);
7849 can_use_hw_watchpoints = 1;