1 /* Everything about breakpoints, for GDB.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
28 #include "breakpoint.h"
30 #include "expression.h"
36 #include "gdbthread.h"
39 #include "gdb_string.h"
46 #include "completer.h"
49 #include "cli/cli-script.h"
50 #include "gdb_assert.h"
52 #include "gdb-events.h"
54 /* Prototypes for local functions. */
56 static void until_break_command_continuation (struct continuation_arg *arg);
58 static void catch_command_1 (char *, int, int);
60 static void enable_delete_command (char *, int);
62 static void enable_delete_breakpoint (struct breakpoint *);
64 static void enable_once_command (char *, int);
66 static void enable_once_breakpoint (struct breakpoint *);
68 static void disable_command (char *, int);
70 static void enable_command (char *, int);
72 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint *));
74 static void ignore_command (char *, int);
76 static int breakpoint_re_set_one (PTR);
78 static void clear_command (char *, int);
80 static void catch_command (char *, int);
82 static void handle_gnu_4_16_catch_command (char *, int, int);
84 static struct symtabs_and_lines get_catch_sals (int);
86 static void watch_command (char *, int);
88 static int can_use_hardware_watchpoint (struct value *);
90 extern void break_at_finish_command (char *, int);
91 extern void break_at_finish_at_depth_command (char *, int);
93 extern void tbreak_at_finish_command (char *, int);
95 static void break_command_1 (char *, int, int);
97 static void mention (struct breakpoint *);
99 struct breakpoint *set_raw_breakpoint (struct symtab_and_line, enum bptype);
101 static void check_duplicates (struct breakpoint *);
103 static void describe_other_breakpoints (CORE_ADDR, asection *);
105 static void breakpoints_info (char *, int);
107 static void breakpoint_1 (int, int);
109 static bpstat bpstat_alloc (struct breakpoint *, bpstat);
111 static int breakpoint_cond_eval (PTR);
113 static void cleanup_executing_breakpoints (PTR);
115 static void commands_command (char *, int);
117 static void condition_command (char *, int);
119 static int get_number_trailer (char **, int);
121 void set_breakpoint_count (int);
130 static int remove_breakpoint (struct breakpoint *, insertion_state_t);
132 static enum print_stop_action print_it_typical (bpstat);
134 static enum print_stop_action print_bp_stop_message (bpstat bs);
138 enum exception_event_kind kind;
141 args_for_catchpoint_enable;
143 static int watchpoint_check (PTR);
145 static int cover_target_enable_exception_callback (PTR);
147 static void maintenance_info_breakpoints (char *, int);
149 static void create_longjmp_breakpoint (char *);
151 static void create_overlay_event_breakpoint (char *);
153 static int hw_breakpoint_used_count (void);
155 static int hw_watchpoint_used_count (enum bptype, int *);
157 static void hbreak_command (char *, int);
159 static void thbreak_command (char *, int);
161 static void watch_command_1 (char *, int, int);
163 static void rwatch_command (char *, int);
165 static void awatch_command (char *, int);
167 static void do_enable_breakpoint (struct breakpoint *, enum bpdisp);
169 static void solib_load_unload_1 (char *hookname,
172 char *cond_string, enum bptype bp_kind);
174 static void create_fork_vfork_event_catchpoint (int tempflag,
176 enum bptype bp_kind);
178 static void break_at_finish_at_depth_command_1 (char *arg,
179 int flag, int from_tty);
181 static void break_at_finish_command_1 (char *arg, int flag, int from_tty);
183 static void stop_command (char *arg, int from_tty);
185 static void stopin_command (char *arg, int from_tty);
187 static void stopat_command (char *arg, int from_tty);
189 static char *ep_find_event_name_end (char *arg);
191 static char *ep_parse_optional_if_clause (char **arg);
193 static char *ep_parse_optional_filename (char **arg);
195 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
196 static void catch_exec_command_1 (char *arg, int tempflag, int from_tty);
199 static void create_exception_catchpoint (int tempflag, char *cond_string,
200 enum exception_event_kind ex_event,
201 struct symtab_and_line *sal);
203 static void catch_exception_command_1 (enum exception_event_kind ex_event,
204 char *arg, int tempflag, int from_tty);
206 static void tcatch_command (char *arg, int from_tty);
208 static void ep_skip_leading_whitespace (char **s);
210 /* Prototypes for exported functions. */
212 /* If FALSE, gdb will not use hardware support for watchpoints, even
213 if such is available. */
214 static int can_use_hw_watchpoints;
216 void _initialize_breakpoint (void);
218 extern int addressprint; /* Print machine addresses? */
220 /* Are we executing breakpoint commands? */
221 static int executing_breakpoint_commands;
223 /* Are overlay event breakpoints enabled? */
224 static int overlay_events_enabled;
226 /* Walk the following statement or block through all breakpoints.
227 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
230 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
232 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
233 for (B = breakpoint_chain; \
234 B ? (TMP=B->next, 1): 0; \
237 /* True if SHIFT_INST_REGS defined, false otherwise. */
239 int must_shift_inst_regs =
240 #if defined(SHIFT_INST_REGS)
247 /* True if breakpoint hit counts should be displayed in breakpoint info. */
249 int show_breakpoint_hit_counts = 1;
251 /* Chain of all breakpoints defined. */
253 struct breakpoint *breakpoint_chain;
255 /* Number of last breakpoint made. */
257 int breakpoint_count;
259 /* Pointer to current exception event record */
260 static struct exception_event_record *current_exception_event;
262 /* Indicator of whether exception catchpoints should be nuked
263 between runs of a program */
264 int exception_catchpoints_are_fragile = 0;
266 /* Indicator of when exception catchpoints set-up should be
267 reinitialized -- e.g. when program is re-run */
268 int exception_support_initialized = 0;
270 /* This function returns a pointer to the string representation of the
271 pathname of the dynamically-linked library that has just been
274 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
275 or undefined results are guaranteed.
277 This string's contents are only valid immediately after the
278 inferior has stopped in the dynamic linker hook, and becomes
279 invalid as soon as the inferior is continued. Clients should make
280 a copy of this string if they wish to continue the inferior and
281 then access the string. */
283 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
284 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
287 /* This function returns a pointer to the string representation of the
288 pathname of the dynamically-linked library that has just been
291 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
292 TRUE, or undefined results are guaranteed.
294 This string's contents are only valid immediately after the
295 inferior has stopped in the dynamic linker hook, and becomes
296 invalid as soon as the inferior is continued. Clients should make
297 a copy of this string if they wish to continue the inferior and
298 then access the string. */
300 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
301 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
304 /* This function is called by the "catch load" command. It allows the
305 debugger to be notified by the dynamic linker when a specified
306 library file (or any library file, if filename is NULL) is loaded. */
308 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
309 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
310 error ("catch of library loads not yet implemented on this platform")
313 /* This function is called by the "catch unload" command. It allows
314 the debugger to be notified by the dynamic linker when a specified
315 library file (or any library file, if filename is NULL) is
318 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
319 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
320 error ("catch of library unloads not yet implemented on this platform")
323 /* Set breakpoint count to NUM. */
326 set_breakpoint_count (int num)
328 breakpoint_count = num;
329 set_internalvar (lookup_internalvar ("bpnum"),
330 value_from_longest (builtin_type_int, (LONGEST) num));
333 /* Used in run_command to zero the hit count when a new run starts. */
336 clear_breakpoint_hit_counts (void)
338 struct breakpoint *b;
344 /* Default address, symtab and line to put a breakpoint at
345 for "break" command with no arg.
346 if default_breakpoint_valid is zero, the other three are
347 not valid, and "break" with no arg is an error.
349 This set by print_stack_frame, which calls set_default_breakpoint. */
351 int default_breakpoint_valid;
352 CORE_ADDR default_breakpoint_address;
353 struct symtab *default_breakpoint_symtab;
354 int default_breakpoint_line;
356 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
357 Advance *PP after the string and any trailing whitespace.
359 Currently the string can either be a number or "$" followed by the name
360 of a convenience variable. Making it an expression wouldn't work well
361 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
363 TRAILER is a character which can be found after the number; most
364 commonly this is `-'. If you don't want a trailer, use \0. */
366 get_number_trailer (char **pp, int trailer)
368 int retval = 0; /* default */
372 /* Empty line means refer to the last breakpoint. */
373 return breakpoint_count;
376 /* Make a copy of the name, so we can null-terminate it
377 to pass to lookup_internalvar(). */
382 while (isalnum (*p) || *p == '_')
384 varname = (char *) alloca (p - start + 1);
385 strncpy (varname, start, p - start);
386 varname[p - start] = '\0';
387 val = value_of_internalvar (lookup_internalvar (varname));
388 if (TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_INT)
389 retval = (int) value_as_long (val);
392 printf_filtered ("Convenience variable must have integer value.\n");
400 while (*p >= '0' && *p <= '9')
403 /* There is no number here. (e.g. "cond a == b"). */
405 /* Skip non-numeric token */
406 while (*p && !isspace((int) *p))
408 /* Return zero, which caller must interpret as error. */
414 if (!(isspace (*p) || *p == '\0' || *p == trailer))
416 /* Trailing junk: return 0 and let caller print error msg. */
417 while (!(isspace (*p) || *p == '\0' || *p == trailer))
428 /* Like get_number_trailer, but don't allow a trailer. */
430 get_number (char **pp)
432 return get_number_trailer (pp, '\0');
435 /* Parse a number or a range.
436 * A number will be of the form handled by get_number.
437 * A range will be of the form <number1> - <number2>, and
438 * will represent all the integers between number1 and number2,
441 * While processing a range, this fuction is called iteratively;
442 * At each call it will return the next value in the range.
444 * At the beginning of parsing a range, the char pointer PP will
445 * be advanced past <number1> and left pointing at the '-' token.
446 * Subsequent calls will not advance the pointer until the range
447 * is completed. The call that completes the range will advance
448 * pointer PP past <number2>.
452 get_number_or_range (char **pp)
454 static int last_retval, end_value;
455 static char *end_ptr;
456 static int in_range = 0;
460 /* Default case: pp is pointing either to a solo number,
461 or to the first number of a range. */
462 last_retval = get_number_trailer (pp, '-');
467 /* This is the start of a range (<number1> - <number2>).
468 Skip the '-', parse and remember the second number,
469 and also remember the end of the final token. */
473 while (isspace ((int) *end_ptr))
474 end_ptr++; /* skip white space */
475 end_value = get_number (temp);
476 if (end_value < last_retval)
478 error ("inverted range");
480 else if (end_value == last_retval)
482 /* degenerate range (number1 == number2). Advance the
483 token pointer so that the range will be treated as a
492 error ("negative value");
495 /* pp points to the '-' that betokens a range. All
496 number-parsing has already been done. Return the next
497 integer value (one greater than the saved previous value).
498 Do not advance the token pointer 'pp' until the end of range
501 if (++last_retval == end_value)
503 /* End of range reached; advance token pointer. */
513 /* condition N EXP -- set break condition of breakpoint N to EXP. */
516 condition_command (char *arg, int from_tty)
518 register struct breakpoint *b;
523 error_no_arg ("breakpoint number");
526 bnum = get_number (&p);
528 error ("Bad breakpoint argument: '%s'", arg);
531 if (b->number == bnum)
538 if (b->cond_string != NULL)
539 xfree (b->cond_string);
544 b->cond_string = NULL;
546 printf_filtered ("Breakpoint %d now unconditional.\n", bnum);
551 /* I don't know if it matters whether this is the string the user
552 typed in or the decompiled expression. */
553 b->cond_string = savestring (arg, strlen (arg));
554 b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0);
556 error ("Junk at end of expression");
558 breakpoints_changed ();
559 breakpoint_modify_event (b->number);
563 error ("No breakpoint number %d.", bnum);
568 commands_command (char *arg, int from_tty)
570 register struct breakpoint *b;
573 struct command_line *l;
575 /* If we allowed this, we would have problems with when to
576 free the storage, if we change the commands currently
579 if (executing_breakpoint_commands)
580 error ("Can't use the \"commands\" command among a breakpoint's commands.");
583 bnum = get_number (&p);
586 error ("Unexpected extra arguments following breakpoint number.");
589 if (b->number == bnum)
593 "Type commands for when breakpoint %d is hit, one per line.",
595 l = read_command_lines (tmpbuf, from_tty);
596 free_command_lines (&b->commands);
598 breakpoints_changed ();
599 breakpoint_modify_event (b->number);
602 error ("No breakpoint number %d.", bnum);
605 /* Like target_read_memory() but if breakpoints are inserted, return
606 the shadow contents instead of the breakpoints themselves.
608 Read "memory data" from whatever target or inferior we have.
609 Returns zero if successful, errno value if not. EIO is used
610 for address out of bounds. If breakpoints are inserted, returns
611 shadow contents, not the breakpoints themselves. From breakpoint.c. */
614 read_memory_nobpt (CORE_ADDR memaddr, char *myaddr, unsigned len)
617 struct breakpoint *b;
618 CORE_ADDR bp_addr = 0;
621 if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
622 /* No breakpoints on this machine. */
623 return target_read_memory (memaddr, myaddr, len);
627 if (b->type == bp_none)
628 warning ("reading through apparently deleted breakpoint #%d?",
631 /* memory breakpoint? */
632 if (b->type == bp_watchpoint
633 || b->type == bp_hardware_watchpoint
634 || b->type == bp_read_watchpoint
635 || b->type == bp_access_watchpoint)
640 /* Addresses and length of the part of the breakpoint that
642 /* XXXX The m68k, sh and h8300 have different local and remote
643 breakpoint values. BREAKPOINT_FROM_PC still manages to
644 correctly determine the breakpoints memory address and size
645 for these targets. */
646 bp_addr = b->address;
648 if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
653 if (bp_addr + bp_size <= memaddr)
654 /* The breakpoint is entirely before the chunk of memory we
657 if (bp_addr >= memaddr + len)
658 /* The breakpoint is entirely after the chunk of memory we are
661 /* Copy the breakpoint from the shadow contents, and recurse for
662 the things before and after. */
664 /* Offset within shadow_contents. */
667 if (bp_addr < memaddr)
669 /* Only copy the second part of the breakpoint. */
670 bp_size -= memaddr - bp_addr;
671 bptoffset = memaddr - bp_addr;
675 if (bp_addr + bp_size > memaddr + len)
677 /* Only copy the first part of the breakpoint. */
678 bp_size -= (bp_addr + bp_size) - (memaddr + len);
681 memcpy (myaddr + bp_addr - memaddr,
682 b->shadow_contents + bptoffset, bp_size);
684 if (bp_addr > memaddr)
686 /* Copy the section of memory before the breakpoint. */
687 status = read_memory_nobpt (memaddr, myaddr, bp_addr - memaddr);
692 if (bp_addr + bp_size < memaddr + len)
694 /* Copy the section of memory after the breakpoint. */
695 status = read_memory_nobpt (bp_addr + bp_size,
696 myaddr + bp_addr + bp_size - memaddr,
697 memaddr + len - (bp_addr + bp_size));
704 /* Nothing overlaps. Just call read_memory_noerr. */
705 return target_read_memory (memaddr, myaddr, len);
709 /* insert_breakpoints is used when starting or continuing the program.
710 remove_breakpoints is used when the program stops.
711 Both return zero if successful,
712 or an `errno' value if could not write the inferior. */
715 insert_breakpoints (void)
717 register struct breakpoint *b, *temp;
718 int return_val = 0; /* return success code. */
720 int disabled_breaks = 0;
721 int hw_breakpoint_error = 0;
722 #ifdef ONE_PROCESS_WRITETEXT
723 int process_warning = 0;
726 static char message1[] = "Error inserting catchpoint %d:\n";
727 static char message[sizeof (message1) + 30];
729 struct ui_file *tmp_error_stream = mem_fileopen ();
730 make_cleanup_ui_file_delete (tmp_error_stream);
732 /* Explicitly mark the warning -- this will only be printed if
733 there was an error. */
734 fprintf_unfiltered (tmp_error_stream, "Warning:\n");
736 ALL_BREAKPOINTS_SAFE (b, temp)
738 if (b->enable_state == bp_permanent)
739 /* Permanent breakpoints cannot be inserted or removed. */
741 if ((b->type == bp_watchpoint
742 || b->type == bp_hardware_watchpoint
743 || b->type == bp_read_watchpoint
744 || b->type == bp_access_watchpoint) && (!b->val))
747 val = evaluate_expression (b->exp);
749 if (VALUE_LAZY (val))
750 value_fetch_lazy (val);
753 if (b->type != bp_watchpoint
754 && b->type != bp_hardware_watchpoint
755 && b->type != bp_read_watchpoint
756 && b->type != bp_access_watchpoint
757 && b->type != bp_catch_fork
758 && b->type != bp_catch_vfork
759 && b->type != bp_catch_exec
760 && b->type != bp_catch_throw
761 && b->type != bp_catch_catch
762 && b->enable_state != bp_disabled
763 && b->enable_state != bp_shlib_disabled
764 && b->enable_state != bp_call_disabled
768 /* "Normal" instruction breakpoint: either the standard
769 trap-instruction bp (bp_breakpoint), or a
770 bp_hardware_breakpoint. */
772 /* First check to see if we have to handle an overlay. */
773 if (overlay_debugging == ovly_off
774 || b->section == NULL
775 || !(section_is_overlay (b->section)))
777 /* No overlay handling: just set the breakpoint. */
779 if (b->type == bp_hardware_breakpoint)
780 val = target_insert_hw_breakpoint (b->address,
783 val = target_insert_breakpoint (b->address, b->shadow_contents);
787 /* This breakpoint is in an overlay section.
788 Shall we set a breakpoint at the LMA? */
789 if (!overlay_events_enabled)
791 /* Yes -- overlay event support is not active,
792 so we must try to set a breakpoint at the LMA.
793 This will not work for a hardware breakpoint. */
794 if (b->type == bp_hardware_breakpoint)
795 warning ("hardware breakpoint %d not supported in overlay!\n",
799 CORE_ADDR addr = overlay_unmapped_address (b->address,
801 /* Set a software (trap) breakpoint at the LMA. */
802 val = target_insert_breakpoint (addr, b->shadow_contents);
804 fprintf_unfiltered (tmp_error_stream,
805 "Overlay breakpoint %d failed: in ROM?",
809 /* Shall we set a breakpoint at the VMA? */
810 if (section_is_mapped (b->section))
812 /* Yes. This overlay section is mapped into memory. */
813 if (b->type == bp_hardware_breakpoint)
814 val = target_insert_hw_breakpoint (b->address,
817 val = target_insert_breakpoint (b->address,
822 /* No. This breakpoint will not be inserted.
823 No error, but do not mark the bp as 'inserted'. */
830 /* Can't set the breakpoint. */
831 #if defined (DISABLE_UNSETTABLE_BREAK)
832 if (DISABLE_UNSETTABLE_BREAK (b->address))
834 /* See also: disable_breakpoints_in_shlibs. */
836 b->enable_state = bp_shlib_disabled;
837 if (!disabled_breaks)
839 fprintf_unfiltered (tmp_error_stream,
840 "Cannot insert breakpoint %d.\n",
842 fprintf_unfiltered (tmp_error_stream,
843 "Temporarily disabling shared library breakpoints:\n");
846 fprintf_unfiltered (tmp_error_stream,
847 "breakpoint #%d\n", b->number);
852 #ifdef ONE_PROCESS_WRITETEXT
855 if (b->type == bp_hardware_breakpoint)
857 hw_breakpoint_error = 1;
858 fprintf_unfiltered (tmp_error_stream,
859 "Cannot insert hardware breakpoint %d.\n",
864 fprintf_unfiltered (tmp_error_stream,
865 "Cannot insert breakpoint %d.\n",
867 fprintf_filtered (tmp_error_stream,
868 "Error accessing memory address ");
869 print_address_numeric (b->address, 1, tmp_error_stream);
870 fprintf_filtered (tmp_error_stream, ": %s.\n",
871 safe_strerror (val));
880 return_val = val; /* remember failure */
882 else if (ep_is_exception_catchpoint (b)
883 && b->enable_state != bp_disabled
884 && b->enable_state != bp_shlib_disabled
885 && b->enable_state != bp_call_disabled
890 /* If we get here, we must have a callback mechanism for exception
891 events -- with g++ style embedded label support, we insert
892 ordinary breakpoints and not catchpoints. */
893 /* Format possible error message */
894 sprintf (message, message1, b->number);
896 val = target_insert_breakpoint (b->address, b->shadow_contents);
899 /* Couldn't set breakpoint for some reason */
900 fprintf_unfiltered (tmp_error_stream,
901 "Cannot insert catchpoint %d; disabling it.\n",
903 fprintf_filtered (tmp_error_stream,
904 "Error accessing memory address ");
905 print_address_numeric (b->address, 1, tmp_error_stream);
906 fprintf_filtered (tmp_error_stream, ": %s.\n",
907 safe_strerror (val));
908 b->enable_state = bp_disabled;
912 /* Bp set, now make sure callbacks are enabled */
914 args_for_catchpoint_enable args;
915 args.kind = b->type == bp_catch_catch ?
916 EX_EVENT_CATCH : EX_EVENT_THROW;
918 val = catch_errors (cover_target_enable_exception_callback,
920 message, RETURN_MASK_ALL);
921 if (val != 0 && val != -1)
925 /* Check if something went wrong; val == 0 can be ignored */
928 /* something went wrong */
929 fprintf_unfiltered (tmp_error_stream,
930 "Cannot insert catchpoint %d; disabling it.\n",
932 b->enable_state = bp_disabled;
937 return_val = val; /* remember failure */
940 else if ((b->type == bp_hardware_watchpoint ||
941 b->type == bp_read_watchpoint ||
942 b->type == bp_access_watchpoint)
943 && b->enable_state == bp_enabled
944 && b->disposition != disp_del_at_next_stop
948 struct frame_info *saved_frame;
949 int saved_level, within_current_scope;
950 struct value *mark = value_mark ();
953 /* Save the current frame and level so we can restore it after
954 evaluating the watchpoint expression on its own frame. */
955 saved_frame = deprecated_selected_frame;
956 saved_level = frame_relative_level (deprecated_selected_frame);
958 /* Determine if the watchpoint is within scope. */
959 if (b->exp_valid_block == NULL)
960 within_current_scope = 1;
963 struct frame_info *fi;
964 fi = frame_find_by_id (b->watchpoint_frame);
965 within_current_scope = (fi != NULL);
966 if (within_current_scope)
970 if (within_current_scope)
972 /* Evaluate the expression and cut the chain of values
973 produced off from the value chain.
975 Make sure the value returned isn't lazy; we use
976 laziness to determine what memory GDB actually needed
977 in order to compute the value of the expression. */
978 v = evaluate_expression (b->exp);
980 value_release_to_mark (mark);
985 /* Look at each value on the value chain. */
986 for (; v; v = v->next)
988 /* If it's a memory location, and GDB actually needed
989 its contents to evaluate the expression, then we
991 if (VALUE_LVAL (v) == lval_memory
994 struct type *vtype = check_typedef (VALUE_TYPE (v));
996 /* We only watch structs and arrays if user asked
997 for it explicitly, never if they just happen to
998 appear in the middle of some value chain. */
999 if (v == b->val_chain
1000 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
1001 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
1006 addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
1007 len = TYPE_LENGTH (VALUE_TYPE (v));
1009 if (b->type == bp_read_watchpoint)
1011 else if (b->type == bp_access_watchpoint)
1014 val = target_insert_watchpoint (addr, len, type);
1017 /* Don't exit the loop, try to insert
1018 every value on the value chain. That's
1019 because we will be removing all the
1020 watches below, and removing a
1021 watchpoint we didn't insert could have
1029 /* Failure to insert a watchpoint on any memory value in the
1030 value chain brings us here. */
1033 remove_breakpoint (b, mark_uninserted);
1034 hw_breakpoint_error = 1;
1035 fprintf_unfiltered (tmp_error_stream,
1036 "Could not insert hardware watchpoint %d.\n",
1043 printf_filtered ("Hardware watchpoint %d deleted ", b->number);
1044 printf_filtered ("because the program has left the block \n");
1045 printf_filtered ("in which its expression is valid.\n");
1046 if (b->related_breakpoint)
1047 b->related_breakpoint->disposition = disp_del_at_next_stop;
1048 b->disposition = disp_del_at_next_stop;
1051 /* Restore the frame and level. */
1052 if ((saved_frame != deprecated_selected_frame) ||
1053 (saved_level != frame_relative_level (deprecated_selected_frame)))
1054 select_frame (saved_frame);
1057 return_val = val; /* remember failure */
1059 else if ((b->type == bp_catch_fork
1060 || b->type == bp_catch_vfork
1061 || b->type == bp_catch_exec)
1062 && b->enable_state == bp_enabled
1070 val = target_insert_fork_catchpoint (PIDGET (inferior_ptid));
1072 case bp_catch_vfork:
1073 val = target_insert_vfork_catchpoint (PIDGET (inferior_ptid));
1076 val = target_insert_exec_catchpoint (PIDGET (inferior_ptid));
1079 warning ("Internal error, %s line %d.", __FILE__, __LINE__);
1084 fprintf_unfiltered (tmp_error_stream,
1085 "Cannot insert catchpoint %d.", b->number);
1091 return_val = val; /* remember failure */
1097 /* If a hardware breakpoint or watchpoint was inserted, add a
1098 message about possibly exhausted resources. */
1099 if (hw_breakpoint_error)
1101 fprintf_unfiltered (tmp_error_stream,
1102 "Could not insert hardware breakpoints:\n\
1103 You may have requested too many hardware breakpoints/watchpoints.\n");
1105 #ifdef ONE_PROCESS_WRITETEXT
1106 if (process_warning)
1107 fprintf_unfiltered (tmp_error_stream,
1108 "The same program may be running in another process.");
1110 target_terminal_ours_for_output ();
1111 error_stream (tmp_error_stream);
1117 remove_breakpoints (void)
1119 register struct breakpoint *b;
1126 val = remove_breakpoint (b, mark_uninserted);
1135 remove_hw_watchpoints (void)
1137 register struct breakpoint *b;
1143 && (b->type == bp_hardware_watchpoint
1144 || b->type == bp_read_watchpoint
1145 || b->type == bp_access_watchpoint))
1147 val = remove_breakpoint (b, mark_uninserted);
1156 reattach_breakpoints (int pid)
1158 register struct breakpoint *b;
1160 struct cleanup *old_chain = save_inferior_ptid ();
1162 /* Set inferior_ptid; remove_breakpoint uses this global. */
1163 inferior_ptid = pid_to_ptid (pid);
1168 remove_breakpoint (b, mark_inserted);
1169 if (b->type == bp_hardware_breakpoint)
1170 val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
1172 val = target_insert_breakpoint (b->address, b->shadow_contents);
1175 do_cleanups (old_chain);
1180 do_cleanups (old_chain);
1185 update_breakpoints_after_exec (void)
1187 struct breakpoint *b;
1188 struct breakpoint *temp;
1190 /* Doing this first prevents the badness of having delete_breakpoint()
1191 write a breakpoint's current "shadow contents" to lift the bp. That
1192 shadow is NOT valid after an exec()! */
1193 mark_breakpoints_out ();
1195 ALL_BREAKPOINTS_SAFE (b, temp)
1197 /* Solib breakpoints must be explicitly reset after an exec(). */
1198 if (b->type == bp_shlib_event)
1200 delete_breakpoint (b);
1204 /* Thread event breakpoints must be set anew after an exec(),
1205 as must overlay event breakpoints. */
1206 if (b->type == bp_thread_event || b->type == bp_overlay_event)
1208 delete_breakpoint (b);
1212 /* Step-resume breakpoints are meaningless after an exec(). */
1213 if (b->type == bp_step_resume)
1215 delete_breakpoint (b);
1219 /* Ditto the sigtramp handler breakpoints. */
1220 if (b->type == bp_through_sigtramp)
1222 delete_breakpoint (b);
1226 /* Ditto the exception-handling catchpoints. */
1227 if ((b->type == bp_catch_catch) || (b->type == bp_catch_throw))
1229 delete_breakpoint (b);
1233 /* Don't delete an exec catchpoint, because else the inferior
1234 won't stop when it ought!
1236 Similarly, we probably ought to keep vfork catchpoints, 'cause
1237 on this target, we may not be able to stop when the vfork is
1238 seen, but only when the subsequent exec is seen. (And because
1239 deleting fork catchpoints here but not vfork catchpoints will
1240 seem mysterious to users, keep those too.)
1242 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1243 target address field, if any, is sufficient to have it be reset
1244 automagically. Certainly on HP-UX that's true.
1246 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1247 valid code address on some platforms (like the mn10200 and
1248 mn10300 simulators). We shouldn't assign any special
1249 interpretation to a breakpoint with a zero address. And in
1250 fact, GDB doesn't --- I can't see what that comment above is
1251 talking about. As far as I can tell, setting the address of a
1252 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1253 is meaningless, since those are implemented with HP-UX kernel
1254 hackery, not by storing breakpoint instructions somewhere. */
1255 if ((b->type == bp_catch_exec) ||
1256 (b->type == bp_catch_vfork) ||
1257 (b->type == bp_catch_fork))
1259 b->address = (CORE_ADDR) NULL;
1263 /* bp_finish is a special case. The only way we ought to be able
1264 to see one of these when an exec() has happened, is if the user
1265 caught a vfork, and then said "finish". Ordinarily a finish just
1266 carries them to the call-site of the current callee, by setting
1267 a temporary bp there and resuming. But in this case, the finish
1268 will carry them entirely through the vfork & exec.
1270 We don't want to allow a bp_finish to remain inserted now. But
1271 we can't safely delete it, 'cause finish_command has a handle to
1272 the bp on a bpstat, and will later want to delete it. There's a
1273 chance (and I've seen it happen) that if we delete the bp_finish
1274 here, that its storage will get reused by the time finish_command
1275 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1276 We really must allow finish_command to delete a bp_finish.
1278 In the absense of a general solution for the "how do we know
1279 it's safe to delete something others may have handles to?"
1280 problem, what we'll do here is just uninsert the bp_finish, and
1281 let finish_command delete it.
1283 (We know the bp_finish is "doomed" in the sense that it's
1284 momentary, and will be deleted as soon as finish_command sees
1285 the inferior stopped. So it doesn't matter that the bp's
1286 address is probably bogus in the new a.out, unlike e.g., the
1287 solib breakpoints.) */
1289 if (b->type == bp_finish)
1294 /* Without a symbolic address, we have little hope of the
1295 pre-exec() address meaning the same thing in the post-exec()
1297 if (b->addr_string == NULL)
1299 delete_breakpoint (b);
1303 /* If this breakpoint has survived the above battery of checks, then
1304 it must have a symbolic address. Be sure that it gets reevaluated
1305 to a target address, rather than reusing the old evaluation.
1307 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1308 for bp_catch_exec and friends, I'm pretty sure this is entirely
1309 unnecessary. A call to breakpoint_re_set_one always recomputes
1310 the breakpoint's address from scratch, or deletes it if it can't.
1311 So I think this assignment could be deleted without effect. */
1312 b->address = (CORE_ADDR) NULL;
1314 /* FIXME what about longjmp breakpoints? Re-create them here? */
1315 create_overlay_event_breakpoint ("_ovly_debug_event");
1319 detach_breakpoints (int pid)
1321 register struct breakpoint *b;
1323 struct cleanup *old_chain = save_inferior_ptid ();
1325 if (pid == PIDGET (inferior_ptid))
1326 error ("Cannot detach breakpoints of inferior_ptid");
1328 /* Set inferior_ptid; remove_breakpoint uses this global. */
1329 inferior_ptid = pid_to_ptid (pid);
1334 val = remove_breakpoint (b, mark_inserted);
1337 do_cleanups (old_chain);
1342 do_cleanups (old_chain);
1347 remove_breakpoint (struct breakpoint *b, insertion_state_t is)
1351 if (b->enable_state == bp_permanent)
1352 /* Permanent breakpoints cannot be inserted or removed. */
1355 if (b->type == bp_none)
1356 warning ("attempted to remove apparently deleted breakpoint #%d?",
1359 if (b->type != bp_watchpoint
1360 && b->type != bp_hardware_watchpoint
1361 && b->type != bp_read_watchpoint
1362 && b->type != bp_access_watchpoint
1363 && b->type != bp_catch_fork
1364 && b->type != bp_catch_vfork
1365 && b->type != bp_catch_exec
1366 && b->type != bp_catch_catch
1367 && b->type != bp_catch_throw)
1369 /* "Normal" instruction breakpoint: either the standard
1370 trap-instruction bp (bp_breakpoint), or a
1371 bp_hardware_breakpoint. */
1373 /* First check to see if we have to handle an overlay. */
1374 if (overlay_debugging == ovly_off
1375 || b->section == NULL
1376 || !(section_is_overlay (b->section)))
1378 /* No overlay handling: just remove the breakpoint. */
1380 if (b->type == bp_hardware_breakpoint)
1381 val = target_remove_hw_breakpoint (b->address,
1382 b->shadow_contents);
1384 val = target_remove_breakpoint (b->address, b->shadow_contents);
1388 /* This breakpoint is in an overlay section.
1389 Did we set a breakpoint at the LMA? */
1390 if (!overlay_events_enabled)
1392 /* Yes -- overlay event support is not active, so we
1393 should have set a breakpoint at the LMA. Remove it.
1395 CORE_ADDR addr = overlay_unmapped_address (b->address,
1397 /* Ignore any failures: if the LMA is in ROM, we will
1398 have already warned when we failed to insert it. */
1399 if (b->type != bp_hardware_breakpoint)
1400 target_remove_hw_breakpoint (addr, b->shadow_contents);
1402 target_remove_breakpoint (addr, b->shadow_contents);
1404 /* Did we set a breakpoint at the VMA?
1405 If so, we will have marked the breakpoint 'inserted'. */
1408 /* Yes -- remove it. Previously we did not bother to
1409 remove the breakpoint if the section had been
1410 unmapped, but let's not rely on that being safe. We
1411 don't know what the overlay manager might do. */
1412 if (b->type == bp_hardware_breakpoint)
1413 val = target_remove_hw_breakpoint (b->address,
1414 b->shadow_contents);
1416 val = target_remove_breakpoint (b->address,
1417 b->shadow_contents);
1421 /* No -- not inserted, so no need to remove. No error. */
1427 b->inserted = (is == mark_inserted);
1429 else if ((b->type == bp_hardware_watchpoint ||
1430 b->type == bp_read_watchpoint ||
1431 b->type == bp_access_watchpoint)
1432 && b->enable_state == bp_enabled
1438 b->inserted = (is == mark_inserted);
1439 /* Walk down the saved value chain. */
1440 for (v = b->val_chain; v; v = v->next)
1442 /* For each memory reference remove the watchpoint
1444 if (VALUE_LVAL (v) == lval_memory
1445 && ! VALUE_LAZY (v))
1447 struct type *vtype = check_typedef (VALUE_TYPE (v));
1449 if (v == b->val_chain
1450 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
1451 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
1456 addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
1457 len = TYPE_LENGTH (VALUE_TYPE (v));
1459 if (b->type == bp_read_watchpoint)
1461 else if (b->type == bp_access_watchpoint)
1464 val = target_remove_watchpoint (addr, len, type);
1471 /* Failure to remove any of the hardware watchpoints comes here. */
1472 if ((is == mark_uninserted) && (b->inserted))
1473 warning ("Could not remove hardware watchpoint %d.",
1476 /* Free the saved value chain. We will construct a new one
1477 the next time the watchpoint is inserted. */
1478 for (v = b->val_chain; v; v = n)
1483 b->val_chain = NULL;
1485 else if ((b->type == bp_catch_fork ||
1486 b->type == bp_catch_vfork ||
1487 b->type == bp_catch_exec)
1488 && b->enable_state == bp_enabled
1495 val = target_remove_fork_catchpoint (PIDGET (inferior_ptid));
1497 case bp_catch_vfork:
1498 val = target_remove_vfork_catchpoint (PIDGET (inferior_ptid));
1501 val = target_remove_exec_catchpoint (PIDGET (inferior_ptid));
1504 warning ("Internal error, %s line %d.", __FILE__, __LINE__);
1509 b->inserted = (is == mark_inserted);
1511 else if ((b->type == bp_catch_catch ||
1512 b->type == bp_catch_throw)
1513 && b->enable_state == bp_enabled
1517 val = target_remove_breakpoint (b->address, b->shadow_contents);
1520 b->inserted = (is == mark_inserted);
1522 else if (ep_is_exception_catchpoint (b)
1523 && b->inserted /* sometimes previous insert doesn't happen */
1524 && b->enable_state == bp_enabled
1528 val = target_remove_breakpoint (b->address, b->shadow_contents);
1532 b->inserted = (is == mark_inserted);
1538 /* Clear the "inserted" flag in all breakpoints. */
1541 mark_breakpoints_out (void)
1543 register struct breakpoint *b;
1549 /* Clear the "inserted" flag in all breakpoints and delete any
1550 breakpoints which should go away between runs of the program.
1552 Plus other such housekeeping that has to be done for breakpoints
1555 Note: this function gets called at the end of a run (by
1556 generic_mourn_inferior) and when a run begins (by
1557 init_wait_for_inferior). */
1562 breakpoint_init_inferior (enum inf_context context)
1564 register struct breakpoint *b, *temp;
1565 static int warning_needed = 0;
1567 ALL_BREAKPOINTS_SAFE (b, temp)
1574 case bp_watchpoint_scope:
1576 /* If the call dummy breakpoint is at the entry point it will
1577 cause problems when the inferior is rerun, so we better
1580 Also get rid of scope breakpoints. */
1581 delete_breakpoint (b);
1585 case bp_hardware_watchpoint:
1586 case bp_read_watchpoint:
1587 case bp_access_watchpoint:
1589 /* Likewise for watchpoints on local expressions. */
1590 if (b->exp_valid_block != NULL)
1591 delete_breakpoint (b);
1592 if (context == inf_starting)
1594 /* Reset val field to force reread of starting value
1595 in insert_breakpoints. */
1597 value_free (b->val);
1602 /* Likewise for exception catchpoints in dynamic-linked
1603 executables where required */
1604 if (ep_is_exception_catchpoint (b) &&
1605 exception_catchpoints_are_fragile)
1608 delete_breakpoint (b);
1614 if (exception_catchpoints_are_fragile)
1615 exception_support_initialized = 0;
1617 /* Don't issue the warning unless it's really needed... */
1618 if (warning_needed && (context != inf_exited))
1620 warning ("Exception catchpoints from last run were deleted.");
1621 warning ("You must reinsert them explicitly.");
1626 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1627 exists at PC. It returns ordinary_breakpoint_here if it's an
1628 ordinary breakpoint, or permanent_breakpoint_here if it's a
1629 permanent breakpoint.
1630 - When continuing from a location with an ordinary breakpoint, we
1631 actually single step once before calling insert_breakpoints.
1632 - When continuing from a localion with a permanent breakpoint, we
1633 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1634 the target, to advance the PC past the breakpoint. */
1636 enum breakpoint_here
1637 breakpoint_here_p (CORE_ADDR pc)
1639 register struct breakpoint *b;
1640 int any_breakpoint_here = 0;
1643 if ((b->enable_state == bp_enabled
1644 || b->enable_state == bp_permanent)
1645 && b->address == pc) /* bp is enabled and matches pc */
1647 if (overlay_debugging
1648 && section_is_overlay (b->section)
1649 && !section_is_mapped (b->section))
1650 continue; /* unmapped overlay -- can't be a match */
1651 else if (b->enable_state == bp_permanent)
1652 return permanent_breakpoint_here;
1654 any_breakpoint_here = 1;
1657 return any_breakpoint_here ? ordinary_breakpoint_here : 0;
1661 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1662 but it only returns true if there is actually a breakpoint inserted
1666 breakpoint_inserted_here_p (CORE_ADDR pc)
1668 register struct breakpoint *b;
1672 && b->address == pc) /* bp is inserted and matches pc */
1674 if (overlay_debugging
1675 && section_is_overlay (b->section)
1676 && !section_is_mapped (b->section))
1677 continue; /* unmapped overlay -- can't be a match */
1685 /* Return nonzero if FRAME is a dummy frame. We can't use
1686 DEPRECATED_PC_IN_CALL_DUMMY because figuring out the saved SP would
1687 take too much time, at least using get_saved_register on the 68k.
1688 This means that for this function to work right a port must use the
1689 bp_call_dummy breakpoint. */
1692 deprecated_frame_in_dummy (struct frame_info *frame)
1694 struct breakpoint *b;
1699 /* This function is used by two files: get_frame_type(), after first
1700 checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and
1701 sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */
1702 gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES);
1706 if (b->type == bp_call_dummy
1707 && b->frame == frame->frame
1708 /* We need to check the PC as well as the frame on the sparc,
1709 for signals.exp in the testsuite. */
1712 - SIZEOF_CALL_DUMMY_WORDS / sizeof (LONGEST) * REGISTER_SIZE))
1713 && frame->pc <= b->address)
1719 /* breakpoint_thread_match (PC, PID) returns true if the breakpoint at
1720 PC is valid for process/thread PID. */
1723 breakpoint_thread_match (CORE_ADDR pc, ptid_t ptid)
1725 struct breakpoint *b;
1728 thread = pid_to_thread_id (ptid);
1731 if (b->enable_state != bp_disabled
1732 && b->enable_state != bp_shlib_disabled
1733 && b->enable_state != bp_call_disabled
1735 && (b->thread == -1 || b->thread == thread))
1737 if (overlay_debugging
1738 && section_is_overlay (b->section)
1739 && !section_is_mapped (b->section))
1740 continue; /* unmapped overlay -- can't be a match */
1749 /* bpstat stuff. External routines' interfaces are documented
1753 ep_is_catchpoint (struct breakpoint *ep)
1756 (ep->type == bp_catch_load)
1757 || (ep->type == bp_catch_unload)
1758 || (ep->type == bp_catch_fork)
1759 || (ep->type == bp_catch_vfork)
1760 || (ep->type == bp_catch_exec)
1761 || (ep->type == bp_catch_catch)
1762 || (ep->type == bp_catch_throw);
1764 /* ??rehrauer: Add more kinds here, as are implemented... */
1768 ep_is_shlib_catchpoint (struct breakpoint *ep)
1771 (ep->type == bp_catch_load)
1772 || (ep->type == bp_catch_unload);
1776 ep_is_exception_catchpoint (struct breakpoint *ep)
1779 (ep->type == bp_catch_catch)
1780 || (ep->type == bp_catch_throw);
1783 /* Clear a bpstat so that it says we are not at any breakpoint.
1784 Also free any storage that is part of a bpstat. */
1787 bpstat_clear (bpstat *bsp)
1798 if (p->old_val != NULL)
1799 value_free (p->old_val);
1800 free_command_lines (&p->commands);
1807 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1808 is part of the bpstat is copied as well. */
1811 bpstat_copy (bpstat bs)
1815 bpstat retval = NULL;
1820 for (; bs != NULL; bs = bs->next)
1822 tmp = (bpstat) xmalloc (sizeof (*tmp));
1823 memcpy (tmp, bs, sizeof (*tmp));
1825 /* This is the first thing in the chain. */
1835 /* Find the bpstat associated with this breakpoint */
1838 bpstat_find_breakpoint (bpstat bsp, struct breakpoint *breakpoint)
1843 for (; bsp != NULL; bsp = bsp->next)
1845 if (bsp->breakpoint_at == breakpoint)
1851 /* Find a step_resume breakpoint associated with this bpstat.
1852 (If there are multiple step_resume bp's on the list, this function
1853 will arbitrarily pick one.)
1855 It is an error to use this function if BPSTAT doesn't contain a
1856 step_resume breakpoint.
1858 See wait_for_inferior's use of this function. */
1860 bpstat_find_step_resume_breakpoint (bpstat bsp)
1865 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1867 current_thread = pid_to_thread_id (inferior_ptid);
1869 for (; bsp != NULL; bsp = bsp->next)
1871 if ((bsp->breakpoint_at != NULL) &&
1872 (bsp->breakpoint_at->type == bp_step_resume) &&
1873 (bsp->breakpoint_at->thread == current_thread ||
1874 bsp->breakpoint_at->thread == -1))
1875 return bsp->breakpoint_at;
1878 error ("Internal error (no step_resume breakpoint found)");
1882 /* Return the breakpoint number of the first breakpoint we are stopped
1883 at. *BSP upon return is a bpstat which points to the remaining
1884 breakpoints stopped at (but which is not guaranteed to be good for
1885 anything but further calls to bpstat_num).
1886 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1889 bpstat_num (bpstat *bsp)
1891 struct breakpoint *b;
1894 return 0; /* No more breakpoint values */
1897 b = (*bsp)->breakpoint_at;
1898 *bsp = (*bsp)->next;
1900 return -1; /* breakpoint that's been deleted since */
1902 return b->number; /* We have its number */
1906 /* Modify BS so that the actions will not be performed. */
1909 bpstat_clear_actions (bpstat bs)
1911 for (; bs != NULL; bs = bs->next)
1913 free_command_lines (&bs->commands);
1914 if (bs->old_val != NULL)
1916 value_free (bs->old_val);
1922 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1925 cleanup_executing_breakpoints (PTR ignore)
1927 executing_breakpoint_commands = 0;
1930 /* Execute all the commands associated with all the breakpoints at this
1931 location. Any of these commands could cause the process to proceed
1932 beyond this point, etc. We look out for such changes by checking
1933 the global "breakpoint_proceeded" after each command. */
1936 bpstat_do_actions (bpstat *bsp)
1939 struct cleanup *old_chain;
1940 struct command_line *cmd;
1942 /* Avoid endless recursion if a `source' command is contained
1944 if (executing_breakpoint_commands)
1947 executing_breakpoint_commands = 1;
1948 old_chain = make_cleanup (cleanup_executing_breakpoints, 0);
1951 /* Note that (as of this writing), our callers all appear to
1952 be passing us the address of global stop_bpstat. And, if
1953 our calls to execute_control_command cause the inferior to
1954 proceed, that global (and hence, *bsp) will change.
1956 We must be careful to not touch *bsp unless the inferior
1957 has not proceeded. */
1959 /* This pointer will iterate over the list of bpstat's. */
1962 breakpoint_proceeded = 0;
1963 for (; bs != NULL; bs = bs->next)
1968 execute_control_command (cmd);
1970 if (breakpoint_proceeded)
1975 if (breakpoint_proceeded)
1976 /* The inferior is proceeded by the command; bomb out now.
1977 The bpstat chain has been blown away by wait_for_inferior.
1978 But since execution has stopped again, there is a new bpstat
1979 to look at, so start over. */
1982 free_command_lines (&bs->commands);
1984 do_cleanups (old_chain);
1987 /* This is the normal print function for a bpstat. In the future,
1988 much of this logic could (should?) be moved to bpstat_stop_status,
1989 by having it set different print_it values.
1991 Current scheme: When we stop, bpstat_print() is called. It loops
1992 through the bpstat list of things causing this stop, calling the
1993 print_bp_stop_message function on each one. The behavior of the
1994 print_bp_stop_message function depends on the print_it field of
1995 bpstat. If such field so indicates, call this function here.
1997 Return values from this routine (ultimately used by bpstat_print()
1998 and normal_stop() to decide what to do):
1999 PRINT_NOTHING: Means we already printed all we needed to print,
2000 don't print anything else.
2001 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2002 that something to be followed by a location.
2003 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2004 that something to be followed by a location.
2005 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2008 static enum print_stop_action
2009 print_it_typical (bpstat bs)
2011 struct cleanup *old_chain;
2012 struct ui_stream *stb;
2013 stb = ui_out_stream_new (uiout);
2014 old_chain = make_cleanup_ui_out_stream_delete (stb);
2015 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2016 which has since been deleted. */
2017 if (bs->breakpoint_at == NULL)
2018 return PRINT_UNKNOWN;
2020 switch (bs->breakpoint_at->type)
2023 case bp_hardware_breakpoint:
2024 annotate_breakpoint (bs->breakpoint_at->number);
2025 ui_out_text (uiout, "\nBreakpoint ");
2026 if (ui_out_is_mi_like_p (uiout))
2027 ui_out_field_string (uiout, "reason", "breakpoint-hit");
2028 ui_out_field_int (uiout, "bkptno", bs->breakpoint_at->number);
2029 ui_out_text (uiout, ", ");
2030 return PRINT_SRC_AND_LOC;
2033 case bp_shlib_event:
2034 /* Did we stop because the user set the stop_on_solib_events
2035 variable? (If so, we report this as a generic, "Stopped due
2036 to shlib event" message.) */
2037 printf_filtered ("Stopped due to shared library event\n");
2038 return PRINT_NOTHING;
2041 case bp_thread_event:
2042 /* Not sure how we will get here.
2043 GDB should not stop for these breakpoints. */
2044 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2045 return PRINT_NOTHING;
2048 case bp_overlay_event:
2049 /* By analogy with the thread event, GDB should not stop for these. */
2050 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2051 return PRINT_NOTHING;
2055 annotate_catchpoint (bs->breakpoint_at->number);
2056 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
2057 printf_filtered ("loaded");
2058 printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname);
2059 return PRINT_SRC_AND_LOC;
2062 case bp_catch_unload:
2063 annotate_catchpoint (bs->breakpoint_at->number);
2064 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
2065 printf_filtered ("unloaded");
2066 printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname);
2067 return PRINT_SRC_AND_LOC;
2071 annotate_catchpoint (bs->breakpoint_at->number);
2072 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
2073 printf_filtered ("forked");
2074 printf_filtered (" process %d), ",
2075 bs->breakpoint_at->forked_inferior_pid);
2076 return PRINT_SRC_AND_LOC;
2079 case bp_catch_vfork:
2080 annotate_catchpoint (bs->breakpoint_at->number);
2081 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
2082 printf_filtered ("vforked");
2083 printf_filtered (" process %d), ",
2084 bs->breakpoint_at->forked_inferior_pid);
2085 return PRINT_SRC_AND_LOC;
2089 annotate_catchpoint (bs->breakpoint_at->number);
2090 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2091 bs->breakpoint_at->number,
2092 bs->breakpoint_at->exec_pathname);
2093 return PRINT_SRC_AND_LOC;
2096 case bp_catch_catch:
2097 if (current_exception_event &&
2098 (CURRENT_EXCEPTION_KIND == EX_EVENT_CATCH))
2100 annotate_catchpoint (bs->breakpoint_at->number);
2101 printf_filtered ("\nCatchpoint %d (exception caught), ",
2102 bs->breakpoint_at->number);
2103 printf_filtered ("throw location ");
2104 if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
2105 printf_filtered ("%s:%d",
2106 CURRENT_EXCEPTION_THROW_FILE,
2107 CURRENT_EXCEPTION_THROW_LINE);
2109 printf_filtered ("unknown");
2111 printf_filtered (", catch location ");
2112 if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
2113 printf_filtered ("%s:%d",
2114 CURRENT_EXCEPTION_CATCH_FILE,
2115 CURRENT_EXCEPTION_CATCH_LINE);
2117 printf_filtered ("unknown");
2119 printf_filtered ("\n");
2120 /* don't bother to print location frame info */
2121 return PRINT_SRC_ONLY;
2125 /* really throw, some other bpstat will handle it */
2126 return PRINT_UNKNOWN;
2130 case bp_catch_throw:
2131 if (current_exception_event &&
2132 (CURRENT_EXCEPTION_KIND == EX_EVENT_THROW))
2134 annotate_catchpoint (bs->breakpoint_at->number);
2135 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2136 bs->breakpoint_at->number);
2137 printf_filtered ("throw location ");
2138 if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
2139 printf_filtered ("%s:%d",
2140 CURRENT_EXCEPTION_THROW_FILE,
2141 CURRENT_EXCEPTION_THROW_LINE);
2143 printf_filtered ("unknown");
2145 printf_filtered (", catch location ");
2146 if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
2147 printf_filtered ("%s:%d",
2148 CURRENT_EXCEPTION_CATCH_FILE,
2149 CURRENT_EXCEPTION_CATCH_LINE);
2151 printf_filtered ("unknown");
2153 printf_filtered ("\n");
2154 /* don't bother to print location frame info */
2155 return PRINT_SRC_ONLY;
2159 /* really catch, some other bpstat will handle it */
2160 return PRINT_UNKNOWN;
2165 case bp_hardware_watchpoint:
2166 if (bs->old_val != NULL)
2168 annotate_watchpoint (bs->breakpoint_at->number);
2169 if (ui_out_is_mi_like_p (uiout))
2170 ui_out_field_string (uiout, "reason", "watchpoint-trigger");
2171 mention (bs->breakpoint_at);
2172 ui_out_tuple_begin (uiout, "value");
2173 ui_out_text (uiout, "\nOld value = ");
2174 value_print (bs->old_val, stb->stream, 0, Val_pretty_default);
2175 ui_out_field_stream (uiout, "old", stb);
2176 ui_out_text (uiout, "\nNew value = ");
2177 value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default);
2178 ui_out_field_stream (uiout, "new", stb);
2179 ui_out_tuple_end (uiout);
2180 ui_out_text (uiout, "\n");
2181 value_free (bs->old_val);
2184 /* More than one watchpoint may have been triggered. */
2185 return PRINT_UNKNOWN;
2188 case bp_read_watchpoint:
2189 if (ui_out_is_mi_like_p (uiout))
2190 ui_out_field_string (uiout, "reason", "read-watchpoint-trigger");
2191 mention (bs->breakpoint_at);
2192 ui_out_tuple_begin (uiout, "value");
2193 ui_out_text (uiout, "\nValue = ");
2194 value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default);
2195 ui_out_field_stream (uiout, "value", stb);
2196 ui_out_tuple_end (uiout);
2197 ui_out_text (uiout, "\n");
2198 return PRINT_UNKNOWN;
2201 case bp_access_watchpoint:
2202 if (bs->old_val != NULL)
2204 annotate_watchpoint (bs->breakpoint_at->number);
2205 if (ui_out_is_mi_like_p (uiout))
2206 ui_out_field_string (uiout, "reason", "access-watchpoint-trigger");
2207 mention (bs->breakpoint_at);
2208 ui_out_tuple_begin (uiout, "value");
2209 ui_out_text (uiout, "\nOld value = ");
2210 value_print (bs->old_val, stb->stream, 0, Val_pretty_default);
2211 ui_out_field_stream (uiout, "old", stb);
2212 value_free (bs->old_val);
2214 ui_out_text (uiout, "\nNew value = ");
2218 mention (bs->breakpoint_at);
2219 if (ui_out_is_mi_like_p (uiout))
2220 ui_out_field_string (uiout, "reason", "access-watchpoint-trigger");
2221 ui_out_tuple_begin (uiout, "value");
2222 ui_out_text (uiout, "\nValue = ");
2224 value_print (bs->breakpoint_at->val, stb->stream, 0,Val_pretty_default);
2225 ui_out_field_stream (uiout, "new", stb);
2226 ui_out_tuple_end (uiout);
2227 ui_out_text (uiout, "\n");
2228 return PRINT_UNKNOWN;
2231 /* Fall through, we don't deal with these types of breakpoints
2235 if (ui_out_is_mi_like_p (uiout))
2236 ui_out_field_string (uiout, "reason", "function-finished");
2237 return PRINT_UNKNOWN;
2241 if (ui_out_is_mi_like_p (uiout))
2242 ui_out_field_string (uiout, "reason", "location-reached");
2243 return PRINT_UNKNOWN;
2248 case bp_longjmp_resume:
2249 case bp_step_resume:
2250 case bp_through_sigtramp:
2251 case bp_watchpoint_scope:
2254 return PRINT_UNKNOWN;
2258 /* Generic routine for printing messages indicating why we
2259 stopped. The behavior of this function depends on the value
2260 'print_it' in the bpstat structure. Under some circumstances we
2261 may decide not to print anything here and delegate the task to
2264 static enum print_stop_action
2265 print_bp_stop_message (bpstat bs)
2267 switch (bs->print_it)
2270 /* Nothing should be printed for this bpstat entry. */
2271 return PRINT_UNKNOWN;
2275 /* We still want to print the frame, but we already printed the
2276 relevant messages. */
2277 return PRINT_SRC_AND_LOC;
2280 case print_it_normal:
2281 /* Normal case, we handle everything in print_it_typical. */
2282 return print_it_typical (bs);
2285 internal_error (__FILE__, __LINE__,
2286 "print_bp_stop_message: unrecognized enum value");
2291 /* Print a message indicating what happened. This is called from
2292 normal_stop(). The input to this routine is the head of the bpstat
2293 list - a list of the eventpoints that caused this stop. This
2294 routine calls the generic print routine for printing a message
2295 about reasons for stopping. This will print (for example) the
2296 "Breakpoint n," part of the output. The return value of this
2299 PRINT_UNKNOWN: Means we printed nothing
2300 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2301 code to print the location. An example is
2302 "Breakpoint 1, " which should be followed by
2304 PRINT_SRC_ONLY: Means we printed something, but there is no need
2305 to also print the location part of the message.
2306 An example is the catch/throw messages, which
2307 don't require a location appended to the end.
2308 PRINT_NOTHING: We have done some printing and we don't need any
2309 further info to be printed.*/
2311 enum print_stop_action
2312 bpstat_print (bpstat bs)
2316 /* Maybe another breakpoint in the chain caused us to stop.
2317 (Currently all watchpoints go on the bpstat whether hit or not.
2318 That probably could (should) be changed, provided care is taken
2319 with respect to bpstat_explains_signal). */
2320 for (; bs; bs = bs->next)
2322 val = print_bp_stop_message (bs);
2323 if (val == PRINT_SRC_ONLY
2324 || val == PRINT_SRC_AND_LOC
2325 || val == PRINT_NOTHING)
2329 /* We reached the end of the chain, or we got a null BS to start
2330 with and nothing was printed. */
2331 return PRINT_UNKNOWN;
2334 /* Evaluate the expression EXP and return 1 if value is zero.
2335 This is used inside a catch_errors to evaluate the breakpoint condition.
2336 The argument is a "struct expression *" that has been cast to char * to
2337 make it pass through catch_errors. */
2340 breakpoint_cond_eval (PTR exp)
2342 struct value *mark = value_mark ();
2343 int i = !value_true (evaluate_expression ((struct expression *) exp));
2344 value_free_to_mark (mark);
2348 /* Allocate a new bpstat and chain it to the current one. */
2351 bpstat_alloc (struct breakpoint *b, bpstat cbs /* Current "bs" value */ )
2355 bs = (bpstat) xmalloc (sizeof (*bs));
2357 bs->breakpoint_at = b;
2358 /* If the condition is false, etc., don't do the commands. */
2359 bs->commands = NULL;
2361 bs->print_it = print_it_normal;
2365 /* Possible return values for watchpoint_check (this can't be an enum
2366 because of check_errors). */
2367 /* The watchpoint has been deleted. */
2368 #define WP_DELETED 1
2369 /* The value has changed. */
2370 #define WP_VALUE_CHANGED 2
2371 /* The value has not changed. */
2372 #define WP_VALUE_NOT_CHANGED 3
2374 #define BP_TEMPFLAG 1
2375 #define BP_HARDWAREFLAG 2
2377 /* Check watchpoint condition. */
2380 watchpoint_check (PTR p)
2382 bpstat bs = (bpstat) p;
2383 struct breakpoint *b;
2384 struct frame_info *fr;
2385 int within_current_scope;
2387 b = bs->breakpoint_at;
2389 if (b->exp_valid_block == NULL)
2390 within_current_scope = 1;
2393 /* There is no current frame at this moment. If we're going to have
2394 any chance of handling watchpoints on local variables, we'll need
2395 the frame chain (so we can determine if we're in scope). */
2396 reinit_frame_cache ();
2397 fr = frame_find_by_id (b->watchpoint_frame);
2398 within_current_scope = (fr != NULL);
2399 /* in_function_epilogue_p() returns a non-zero value if we're still
2400 in the function but the stack frame has already been invalidated.
2401 Since we can't rely on the values of local variables after the
2402 stack has been destroyed, we are treating the watchpoint in that
2403 state as `not changed' without further checking. */
2404 if (within_current_scope && fr == get_current_frame ()
2405 && gdbarch_in_function_epilogue_p (current_gdbarch, read_pc ()))
2406 return WP_VALUE_NOT_CHANGED;
2407 if (within_current_scope)
2408 /* If we end up stopping, the current frame will get selected
2409 in normal_stop. So this call to select_frame won't affect
2414 if (within_current_scope)
2416 /* We use value_{,free_to_}mark because it could be a
2417 *long* time before we return to the command level and
2418 call free_all_values. We can't call free_all_values because
2419 we might be in the middle of evaluating a function call. */
2421 struct value *mark = value_mark ();
2422 struct value *new_val = evaluate_expression (bs->breakpoint_at->exp);
2423 if (!value_equal (b->val, new_val))
2425 release_value (new_val);
2426 value_free_to_mark (mark);
2427 bs->old_val = b->val;
2429 /* We will stop here */
2430 return WP_VALUE_CHANGED;
2434 /* Nothing changed, don't do anything. */
2435 value_free_to_mark (mark);
2436 /* We won't stop here */
2437 return WP_VALUE_NOT_CHANGED;
2442 /* This seems like the only logical thing to do because
2443 if we temporarily ignored the watchpoint, then when
2444 we reenter the block in which it is valid it contains
2445 garbage (in the case of a function, it may have two
2446 garbage values, one before and one after the prologue).
2447 So we can't even detect the first assignment to it and
2448 watch after that (since the garbage may or may not equal
2449 the first value assigned). */
2450 /* We print all the stop information in print_it_typical(), but
2451 in this case, by the time we call print_it_typical() this bp
2452 will be deleted already. So we have no choice but print the
2453 information here. */
2454 if (ui_out_is_mi_like_p (uiout))
2455 ui_out_field_string (uiout, "reason", "watchpoint-scope");
2456 ui_out_text (uiout, "\nWatchpoint ");
2457 ui_out_field_int (uiout, "wpnum", bs->breakpoint_at->number);
2458 ui_out_text (uiout, " deleted because the program has left the block in\n\
2459 which its expression is valid.\n");
2461 if (b->related_breakpoint)
2462 b->related_breakpoint->disposition = disp_del_at_next_stop;
2463 b->disposition = disp_del_at_next_stop;
2469 /* Get a bpstat associated with having just stopped at address *PC
2470 and frame address CORE_ADDRESS. Update *PC to point at the
2471 breakpoint (if we hit a breakpoint). NOT_A_SW_BREAKPOINT is nonzero
2472 if this is known to not be a real breakpoint (it could still be a
2473 watchpoint, though). */
2475 /* Determine whether we stopped at a breakpoint, etc, or whether we
2476 don't understand this stop. Result is a chain of bpstat's such that:
2478 if we don't understand the stop, the result is a null pointer.
2480 if we understand why we stopped, the result is not null.
2482 Each element of the chain refers to a particular breakpoint or
2483 watchpoint at which we have stopped. (We may have stopped for
2484 several reasons concurrently.)
2486 Each element of the chain has valid next, breakpoint_at,
2487 commands, FIXME??? fields. */
2490 bpstat_stop_status (CORE_ADDR *pc, int not_a_sw_breakpoint)
2492 register struct breakpoint *b, *temp;
2494 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2495 int real_breakpoint = 0;
2496 /* Root of the chain of bpstat's */
2497 struct bpstats root_bs[1];
2498 /* Pointer to the last thing in the chain currently. */
2499 bpstat bs = root_bs;
2500 static char message1[] =
2501 "Error evaluating expression for watchpoint %d\n";
2502 char message[sizeof (message1) + 30 /* slop */ ];
2504 /* Get the address where the breakpoint would have been. The
2505 "not_a_sw_breakpoint" argument is meant to distinguish between a
2506 breakpoint trap event and a trace/singlestep trap event. For a
2507 trace/singlestep trap event, we would not want to subtract
2508 DECR_PC_AFTER_BREAK from the PC. */
2510 bp_addr = *pc - (not_a_sw_breakpoint ? 0 : DECR_PC_AFTER_BREAK);
2512 ALL_BREAKPOINTS_SAFE (b, temp)
2514 if (b->enable_state == bp_disabled
2515 || b->enable_state == bp_shlib_disabled
2516 || b->enable_state == bp_call_disabled)
2519 if (b->type != bp_watchpoint
2520 && b->type != bp_hardware_watchpoint
2521 && b->type != bp_read_watchpoint
2522 && b->type != bp_access_watchpoint
2523 && b->type != bp_hardware_breakpoint
2524 && b->type != bp_catch_fork
2525 && b->type != bp_catch_vfork
2526 && b->type != bp_catch_exec
2527 && b->type != bp_catch_catch
2528 && b->type != bp_catch_throw) /* a non-watchpoint bp */
2530 if (b->address != bp_addr) /* address doesn't match */
2532 if (overlay_debugging /* unmapped overlay section */
2533 && section_is_overlay (b->section)
2534 && !section_is_mapped (b->section))
2538 if (b->type == bp_hardware_breakpoint)
2540 if (b->address != (*pc - DECR_PC_AFTER_HW_BREAK))
2542 if (overlay_debugging /* unmapped overlay section */
2543 && section_is_overlay (b->section)
2544 && !section_is_mapped (b->section))
2548 /* Is this a catchpoint of a load or unload? If so, did we
2549 get a load or unload of the specified library? If not,
2551 if ((b->type == bp_catch_load)
2552 #if defined(SOLIB_HAVE_LOAD_EVENT)
2553 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid))
2554 || ((b->dll_pathname != NULL)
2555 && (strcmp (b->dll_pathname,
2556 SOLIB_LOADED_LIBRARY_PATHNAME (
2557 PIDGET (inferior_ptid)))
2563 if ((b->type == bp_catch_unload)
2564 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2565 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid))
2566 || ((b->dll_pathname != NULL)
2567 && (strcmp (b->dll_pathname,
2568 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2569 PIDGET (inferior_ptid)))
2575 if ((b->type == bp_catch_fork)
2576 && !inferior_has_forked (PIDGET (inferior_ptid),
2577 &b->forked_inferior_pid))
2580 if ((b->type == bp_catch_vfork)
2581 && !inferior_has_vforked (PIDGET (inferior_ptid),
2582 &b->forked_inferior_pid))
2585 if ((b->type == bp_catch_exec)
2586 && !inferior_has_execd (PIDGET (inferior_ptid), &b->exec_pathname))
2589 if (ep_is_exception_catchpoint (b) &&
2590 !(current_exception_event = target_get_current_exception_event ()))
2593 /* Come here if it's a watchpoint, or if the break address matches */
2595 bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */
2597 /* Watchpoints may change this, if not found to have triggered. */
2601 sprintf (message, message1, b->number);
2602 if (b->type == bp_watchpoint ||
2603 b->type == bp_hardware_watchpoint)
2605 switch (catch_errors (watchpoint_check, bs, message,
2609 /* We've already printed what needs to be printed. */
2610 /* Actually this is superfluous, because by the time we
2611 call print_it_typical() the wp will be already deleted,
2612 and the function will return immediately. */
2613 bs->print_it = print_it_done;
2616 case WP_VALUE_CHANGED:
2620 case WP_VALUE_NOT_CHANGED:
2622 bs->print_it = print_it_noop;
2629 /* Error from catch_errors. */
2630 printf_filtered ("Watchpoint %d deleted.\n", b->number);
2631 if (b->related_breakpoint)
2632 b->related_breakpoint->disposition = disp_del_at_next_stop;
2633 b->disposition = disp_del_at_next_stop;
2634 /* We've already printed what needs to be printed. */
2635 bs->print_it = print_it_done;
2641 else if (b->type == bp_read_watchpoint ||
2642 b->type == bp_access_watchpoint)
2648 addr = target_stopped_data_address ();
2651 for (v = b->val_chain; v; v = v->next)
2653 if (VALUE_LVAL (v) == lval_memory
2654 && ! VALUE_LAZY (v))
2656 struct type *vtype = check_typedef (VALUE_TYPE (v));
2658 if (v == b->val_chain
2659 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
2660 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
2664 vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
2665 /* Exact match not required. Within range is
2667 if (addr >= vaddr &&
2668 addr < vaddr + TYPE_LENGTH (VALUE_TYPE (v)))
2674 switch (catch_errors (watchpoint_check, bs, message,
2678 /* We've already printed what needs to be printed. */
2679 bs->print_it = print_it_done;
2682 case WP_VALUE_CHANGED:
2683 if (b->type == bp_read_watchpoint)
2685 /* Don't stop: read watchpoints shouldn't fire if
2686 the value has changed. This is for targets which
2687 cannot set read-only watchpoints. */
2688 bs->print_it = print_it_noop;
2694 case WP_VALUE_NOT_CHANGED:
2701 /* Error from catch_errors. */
2702 printf_filtered ("Watchpoint %d deleted.\n", b->number);
2703 if (b->related_breakpoint)
2704 b->related_breakpoint->disposition = disp_del_at_next_stop;
2705 b->disposition = disp_del_at_next_stop;
2706 /* We've already printed what needs to be printed. */
2707 bs->print_it = print_it_done;
2710 else /* found == 0 */
2712 /* This is a case where some watchpoint(s) triggered,
2713 but not at the address of this watchpoint (FOUND
2714 was left zero). So don't print anything for this
2716 bs->print_it = print_it_noop;
2723 /* By definition, an encountered breakpoint is a triggered
2727 real_breakpoint = 1;
2731 b->frame != (get_current_frame ())->frame)
2735 int value_is_zero = 0;
2739 /* Need to select the frame, with all that implies
2740 so that the conditions will have the right context. */
2741 select_frame (get_current_frame ());
2743 = catch_errors (breakpoint_cond_eval, (b->cond),
2744 "Error in testing breakpoint condition:\n",
2746 /* FIXME-someday, should give breakpoint # */
2749 if (b->cond && value_is_zero)
2752 /* Don't consider this a hit. */
2755 else if (b->ignore_count > 0)
2758 annotate_ignore_count_change ();
2763 /* We will stop here */
2764 if (b->disposition == disp_disable)
2765 b->enable_state = bp_disabled;
2766 bs->commands = copy_command_lines (b->commands);
2770 (STREQ ("silent", bs->commands->line) ||
2771 (xdb_commands && STREQ ("Q", bs->commands->line))))
2773 bs->commands = bs->commands->next;
2778 /* Print nothing for this entry if we dont stop or if we dont print. */
2779 if (bs->stop == 0 || bs->print == 0)
2780 bs->print_it = print_it_noop;
2783 bs->next = NULL; /* Terminate the chain */
2784 bs = root_bs->next; /* Re-grab the head of the chain */
2786 if (real_breakpoint && bs)
2788 if (bs->breakpoint_at->type == bp_hardware_breakpoint)
2790 if (DECR_PC_AFTER_HW_BREAK != 0)
2792 *pc = *pc - DECR_PC_AFTER_HW_BREAK;
2798 if (DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs)
2801 #if defined (SHIFT_INST_REGS)
2803 #else /* No SHIFT_INST_REGS. */
2805 #endif /* No SHIFT_INST_REGS. */
2810 /* The value of a hardware watchpoint hasn't changed, but the
2811 intermediate memory locations we are watching may have. */
2812 if (bs && !bs->stop &&
2813 (bs->breakpoint_at->type == bp_hardware_watchpoint ||
2814 bs->breakpoint_at->type == bp_read_watchpoint ||
2815 bs->breakpoint_at->type == bp_access_watchpoint))
2817 remove_breakpoints ();
2818 insert_breakpoints ();
2823 /* Tell what to do about this bpstat. */
2825 bpstat_what (bpstat bs)
2827 /* Classify each bpstat as one of the following. */
2830 /* This bpstat element has no effect on the main_action. */
2833 /* There was a watchpoint, stop but don't print. */
2836 /* There was a watchpoint, stop and print. */
2839 /* There was a breakpoint but we're not stopping. */
2842 /* There was a breakpoint, stop but don't print. */
2845 /* There was a breakpoint, stop and print. */
2848 /* We hit the longjmp breakpoint. */
2851 /* We hit the longjmp_resume breakpoint. */
2854 /* We hit the step_resume breakpoint. */
2857 /* We hit the through_sigtramp breakpoint. */
2860 /* We hit the shared library event breakpoint. */
2863 /* We caught a shared library event. */
2866 /* This is just used to count how many enums there are. */
2870 /* Here is the table which drives this routine. So that we can
2871 format it pretty, we define some abbreviations for the
2872 enum bpstat_what codes. */
2873 #define kc BPSTAT_WHAT_KEEP_CHECKING
2874 #define ss BPSTAT_WHAT_STOP_SILENT
2875 #define sn BPSTAT_WHAT_STOP_NOISY
2876 #define sgl BPSTAT_WHAT_SINGLE
2877 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2878 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2879 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2880 #define sr BPSTAT_WHAT_STEP_RESUME
2881 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2882 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2883 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2885 /* "Can't happen." Might want to print an error message.
2886 abort() is not out of the question, but chances are GDB is just
2887 a bit confused, not unusable. */
2888 #define err BPSTAT_WHAT_STOP_NOISY
2890 /* Given an old action and a class, come up with a new action. */
2891 /* One interesting property of this table is that wp_silent is the same
2892 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2893 after stopping, the check for whether to step over a breakpoint
2894 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2895 reference to how we stopped. We retain separate wp_silent and
2896 bp_silent codes in case we want to change that someday.
2898 Another possibly interesting property of this table is that
2899 there's a partial ordering, priority-like, of the actions. Once
2900 you've decided that some action is appropriate, you'll never go
2901 back and decide something of a lower priority is better. The
2904 kc < clr sgl shl shlr slr sn sr ss ts
2905 sgl < clrs shl shlr slr sn sr ss ts
2906 slr < err shl shlr sn sr ss ts
2907 clr < clrs err shl shlr sn sr ss ts
2908 clrs < err shl shlr sn sr ss ts
2909 ss < shl shlr sn sr ts
2916 What I think this means is that we don't need a damned table
2917 here. If you just put the rows and columns in the right order,
2918 it'd look awfully regular. We could simply walk the bpstat list
2919 and choose the highest priority action we find, with a little
2920 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2921 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2922 is messy anyway). */
2924 /* step_resume entries: a step resume breakpoint overrides another
2925 breakpoint of signal handling (see comment in wait_for_inferior
2926 at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
2927 /* We handle the through_sigtramp_breakpoint the same way; having both
2928 one of those and a step_resume_breakpoint is probably very rare (?). */
2930 static const enum bpstat_what_main_action
2931 table[(int) class_last][(int) BPSTAT_WHAT_LAST] =
2934 /* kc ss sn sgl slr clr clrs sr ts shl shlr
2937 {kc, ss, sn, sgl, slr, clr, clrs, sr, ts, shl, shlr},
2939 {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
2941 {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
2943 {sgl, ss, sn, sgl, slr, clrs, clrs, sr, ts, shl, shlr},
2945 {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
2947 {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
2949 {slr, ss, sn, slr, slr, err, err, sr, ts, shl, shlr},
2951 {clr, ss, sn, clrs, err, err, err, sr, ts, shl, shlr},
2953 {sr, sr, sr, sr, sr, sr, sr, sr, ts, shl, shlr},
2955 {ts, ts, ts, ts, ts, ts, ts, ts, ts, shl, shlr},
2957 {shl, shl, shl, shl, shl, shl, shl, shl, ts, shl, shlr},
2959 {shlr, shlr, shlr, shlr, shlr, shlr, shlr, shlr, ts, shlr, shlr}
2974 enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
2975 struct bpstat_what retval;
2977 retval.call_dummy = 0;
2978 for (; bs != NULL; bs = bs->next)
2980 enum class bs_class = no_effect;
2981 if (bs->breakpoint_at == NULL)
2982 /* I suspect this can happen if it was a momentary breakpoint
2983 which has since been deleted. */
2985 switch (bs->breakpoint_at->type)
2991 case bp_hardware_breakpoint:
2997 bs_class = bp_noisy;
2999 bs_class = bp_silent;
3002 bs_class = bp_nostop;
3005 case bp_hardware_watchpoint:
3006 case bp_read_watchpoint:
3007 case bp_access_watchpoint:
3011 bs_class = wp_noisy;
3013 bs_class = wp_silent;
3016 /* There was a watchpoint, but we're not stopping.
3017 This requires no further action. */
3018 bs_class = no_effect;
3021 bs_class = long_jump;
3023 case bp_longjmp_resume:
3024 bs_class = long_resume;
3026 case bp_step_resume:
3029 bs_class = step_resume;
3032 /* It is for the wrong frame. */
3033 bs_class = bp_nostop;
3035 case bp_through_sigtramp:
3036 bs_class = through_sig;
3038 case bp_watchpoint_scope:
3039 bs_class = bp_nostop;
3041 case bp_shlib_event:
3042 bs_class = shlib_event;
3044 case bp_thread_event:
3045 case bp_overlay_event:
3046 bs_class = bp_nostop;
3049 case bp_catch_unload:
3050 /* Only if this catchpoint triggered should we cause the
3051 step-out-of-dld behaviour. Otherwise, we ignore this
3054 bs_class = catch_shlib_event;
3056 bs_class = no_effect;
3059 case bp_catch_vfork:
3064 bs_class = bp_noisy;
3066 bs_class = bp_silent;
3069 /* There was a catchpoint, but we're not stopping.
3070 This requires no further action. */
3071 bs_class = no_effect;
3073 case bp_catch_catch:
3074 if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_CATCH)
3075 bs_class = bp_nostop;
3077 bs_class = bs->print ? bp_noisy : bp_silent;
3079 case bp_catch_throw:
3080 if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_THROW)
3081 bs_class = bp_nostop;
3083 bs_class = bs->print ? bp_noisy : bp_silent;
3086 /* Make sure the action is stop (silent or noisy),
3087 so infrun.c pops the dummy frame. */
3088 bs_class = bp_silent;
3089 retval.call_dummy = 1;
3092 current_action = table[(int) bs_class][(int) current_action];
3094 retval.main_action = current_action;
3098 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3099 without hardware support). This isn't related to a specific bpstat,
3100 just to things like whether watchpoints are set. */
3103 bpstat_should_step (void)
3105 struct breakpoint *b;
3107 if (b->enable_state == bp_enabled && b->type == bp_watchpoint)
3112 /* Nonzero if there are enabled hardware watchpoints. */
3114 bpstat_have_active_hw_watchpoints (void)
3116 struct breakpoint *b;
3118 if ((b->enable_state == bp_enabled) &&
3120 ((b->type == bp_hardware_watchpoint) ||
3121 (b->type == bp_read_watchpoint) ||
3122 (b->type == bp_access_watchpoint)))
3128 /* Given a bpstat that records zero or more triggered eventpoints, this
3129 function returns another bpstat which contains only the catchpoints
3130 on that first list, if any. */
3132 bpstat_get_triggered_catchpoints (bpstat ep_list, bpstat *cp_list)
3134 struct bpstats root_bs[1];
3135 bpstat bs = root_bs;
3136 struct breakpoint *ep;
3139 bpstat_clear (cp_list);
3140 root_bs->next = NULL;
3142 for (; ep_list != NULL; ep_list = ep_list->next)
3144 /* Is this eventpoint a catchpoint? If not, ignore it. */
3145 ep = ep_list->breakpoint_at;
3148 if ((ep->type != bp_catch_load) &&
3149 (ep->type != bp_catch_unload) &&
3150 (ep->type != bp_catch_catch) &&
3151 (ep->type != bp_catch_throw))
3152 /* pai: (temp) ADD fork/vfork here!! */
3155 /* Yes; add it to the list. */
3156 bs = bpstat_alloc (ep, bs);
3161 #if defined(SOLIB_ADD)
3162 /* Also, for each triggered catchpoint, tag it with the name of
3163 the library that caused this trigger. (We copy the name now,
3164 because it's only guaranteed to be available NOW, when the
3165 catchpoint triggers. Clients who may wish to know the name
3166 later must get it from the catchpoint itself.) */
3167 if (ep->triggered_dll_pathname != NULL)
3168 xfree (ep->triggered_dll_pathname);
3169 if (ep->type == bp_catch_load)
3170 dll_pathname = SOLIB_LOADED_LIBRARY_PATHNAME (
3171 PIDGET (inferior_ptid));
3173 dll_pathname = SOLIB_UNLOADED_LIBRARY_PATHNAME (
3174 PIDGET (inferior_ptid));
3176 dll_pathname = NULL;
3180 ep->triggered_dll_pathname = (char *)
3181 xmalloc (strlen (dll_pathname) + 1);
3182 strcpy (ep->triggered_dll_pathname, dll_pathname);
3185 ep->triggered_dll_pathname = NULL;
3191 /* Print B to gdb_stdout. */
3193 print_one_breakpoint (struct breakpoint *b,
3194 CORE_ADDR *last_addr)
3196 register struct command_line *l;
3197 register struct symbol *sym;
3198 struct ep_type_description
3203 static struct ep_type_description bptypes[] =
3205 {bp_none, "?deleted?"},
3206 {bp_breakpoint, "breakpoint"},
3207 {bp_hardware_breakpoint, "hw breakpoint"},
3208 {bp_until, "until"},
3209 {bp_finish, "finish"},
3210 {bp_watchpoint, "watchpoint"},
3211 {bp_hardware_watchpoint, "hw watchpoint"},
3212 {bp_read_watchpoint, "read watchpoint"},
3213 {bp_access_watchpoint, "acc watchpoint"},
3214 {bp_longjmp, "longjmp"},
3215 {bp_longjmp_resume, "longjmp resume"},
3216 {bp_step_resume, "step resume"},
3217 {bp_through_sigtramp, "sigtramp"},
3218 {bp_watchpoint_scope, "watchpoint scope"},
3219 {bp_call_dummy, "call dummy"},
3220 {bp_shlib_event, "shlib events"},
3221 {bp_thread_event, "thread events"},
3222 {bp_overlay_event, "overlay events"},
3223 {bp_catch_load, "catch load"},
3224 {bp_catch_unload, "catch unload"},
3225 {bp_catch_fork, "catch fork"},
3226 {bp_catch_vfork, "catch vfork"},
3227 {bp_catch_exec, "catch exec"},
3228 {bp_catch_catch, "catch catch"},
3229 {bp_catch_throw, "catch throw"}
3232 static char *bpdisps[] =
3233 {"del", "dstp", "dis", "keep"};
3234 static char bpenables[] = "nynny";
3235 char wrap_indent[80];
3236 struct ui_stream *stb = ui_out_stream_new (uiout);
3237 struct cleanup *old_chain = make_cleanup_ui_out_stream_delete (stb);
3240 ui_out_tuple_begin (uiout, "bkpt");
3244 ui_out_field_int (uiout, "number", b->number);
3248 if (((int) b->type > (sizeof (bptypes) / sizeof (bptypes[0])))
3249 || ((int) b->type != bptypes[(int) b->type].type))
3250 internal_error (__FILE__, __LINE__,
3251 "bptypes table does not describe type #%d.",
3253 ui_out_field_string (uiout, "type", bptypes[(int) b->type].description);
3257 ui_out_field_string (uiout, "disp", bpdisps[(int) b->disposition]);
3261 ui_out_field_fmt (uiout, "enabled", "%c", bpenables[(int) b->enable_state]);
3262 ui_out_spaces (uiout, 2);
3265 strcpy (wrap_indent, " ");
3268 if (TARGET_ADDR_BIT <= 32)
3269 strcat (wrap_indent, " ");
3271 strcat (wrap_indent, " ");
3276 internal_error (__FILE__, __LINE__,
3277 "print_one_breakpoint: bp_none encountered\n");
3281 case bp_hardware_watchpoint:
3282 case bp_read_watchpoint:
3283 case bp_access_watchpoint:
3284 /* Field 4, the address, is omitted (which makes the columns
3285 not line up too nicely with the headers, but the effect
3286 is relatively readable). */
3288 ui_out_field_skip (uiout, "addr");
3290 print_expression (b->exp, stb->stream);
3291 ui_out_field_stream (uiout, "what", stb);
3295 case bp_catch_unload:
3296 /* Field 4, the address, is omitted (which makes the columns
3297 not line up too nicely with the headers, but the effect
3298 is relatively readable). */
3300 ui_out_field_skip (uiout, "addr");
3302 if (b->dll_pathname == NULL)
3304 ui_out_field_string (uiout, "what", "<any library>");
3305 ui_out_spaces (uiout, 1);
3309 ui_out_text (uiout, "library \"");
3310 ui_out_field_string (uiout, "what", b->dll_pathname);
3311 ui_out_text (uiout, "\" ");
3316 case bp_catch_vfork:
3317 /* Field 4, the address, is omitted (which makes the columns
3318 not line up too nicely with the headers, but the effect
3319 is relatively readable). */
3321 ui_out_field_skip (uiout, "addr");
3323 if (b->forked_inferior_pid != 0)
3325 ui_out_text (uiout, "process ");
3326 ui_out_field_int (uiout, "what", b->forked_inferior_pid);
3327 ui_out_spaces (uiout, 1);
3331 /* Field 4, the address, is omitted (which makes the columns
3332 not line up too nicely with the headers, but the effect
3333 is relatively readable). */
3335 ui_out_field_skip (uiout, "addr");
3337 if (b->exec_pathname != NULL)
3339 ui_out_text (uiout, "program \"");
3340 ui_out_field_string (uiout, "what", b->exec_pathname);
3341 ui_out_text (uiout, "\" ");
3345 case bp_catch_catch:
3346 /* Field 4, the address, is omitted (which makes the columns
3347 not line up too nicely with the headers, but the effect
3348 is relatively readable). */
3350 ui_out_field_skip (uiout, "addr");
3352 ui_out_field_string (uiout, "what", "exception catch");
3353 ui_out_spaces (uiout, 1);
3356 case bp_catch_throw:
3357 /* Field 4, the address, is omitted (which makes the columns
3358 not line up too nicely with the headers, but the effect
3359 is relatively readable). */
3361 ui_out_field_skip (uiout, "addr");
3363 ui_out_field_string (uiout, "what", "exception throw");
3364 ui_out_spaces (uiout, 1);
3368 case bp_hardware_breakpoint:
3372 case bp_longjmp_resume:
3373 case bp_step_resume:
3374 case bp_through_sigtramp:
3375 case bp_watchpoint_scope:
3377 case bp_shlib_event:
3378 case bp_thread_event:
3379 case bp_overlay_event:
3383 ui_out_field_core_addr (uiout, "addr", b->address);
3386 *last_addr = b->address;
3389 sym = find_pc_sect_function (b->address, b->section);
3392 ui_out_text (uiout, "in ");
3393 ui_out_field_string (uiout, "func",
3394 SYMBOL_SOURCE_NAME (sym));
3395 ui_out_wrap_hint (uiout, wrap_indent);
3396 ui_out_text (uiout, " at ");
3398 ui_out_field_string (uiout, "file", b->source_file);
3399 ui_out_text (uiout, ":");
3400 ui_out_field_int (uiout, "line", b->line_number);
3404 print_address_symbolic (b->address, stb->stream, demangle, "");
3405 ui_out_field_stream (uiout, "at", stb);
3410 if (b->thread != -1)
3412 /* FIXME: This seems to be redundant and lost here; see the
3413 "stop only in" line a little further down. */
3414 ui_out_text (uiout, " thread ");
3415 ui_out_field_int (uiout, "thread", b->thread);
3418 ui_out_text (uiout, "\n");
3423 ui_out_text (uiout, "\tstop only in stack frame at ");
3424 ui_out_field_core_addr (uiout, "frame", b->frame);
3425 ui_out_text (uiout, "\n");
3431 ui_out_text (uiout, "\tstop only if ");
3432 print_expression (b->cond, stb->stream);
3433 ui_out_field_stream (uiout, "cond", stb);
3434 ui_out_text (uiout, "\n");
3437 if (b->thread != -1)
3439 /* FIXME should make an annotation for this */
3440 ui_out_text (uiout, "\tstop only in thread ");
3441 ui_out_field_int (uiout, "thread", b->thread);
3442 ui_out_text (uiout, "\n");
3445 if (show_breakpoint_hit_counts && b->hit_count)
3447 /* FIXME should make an annotation for this */
3448 if (ep_is_catchpoint (b))
3449 ui_out_text (uiout, "\tcatchpoint");
3451 ui_out_text (uiout, "\tbreakpoint");
3452 ui_out_text (uiout, " already hit ");
3453 ui_out_field_int (uiout, "times", b->hit_count);
3454 if (b->hit_count == 1)
3455 ui_out_text (uiout, " time\n");
3457 ui_out_text (uiout, " times\n");
3460 /* Output the count also if it is zero, but only if this is
3461 mi. FIXME: Should have a better test for this. */
3462 if (ui_out_is_mi_like_p (uiout))
3463 if (show_breakpoint_hit_counts && b->hit_count == 0)
3464 ui_out_field_int (uiout, "times", b->hit_count);
3466 if (b->ignore_count)
3469 ui_out_text (uiout, "\tignore next ");
3470 ui_out_field_int (uiout, "ignore", b->ignore_count);
3471 ui_out_text (uiout, " hits\n");
3474 if ((l = b->commands))
3477 ui_out_tuple_begin (uiout, "script");
3478 print_command_lines (uiout, l, 4);
3479 ui_out_tuple_end (uiout);
3481 ui_out_tuple_end (uiout);
3482 do_cleanups (old_chain);
3485 struct captured_breakpoint_query_args
3491 do_captured_breakpoint_query (struct ui_out *uiout, void *data)
3493 struct captured_breakpoint_query_args *args = data;
3494 register struct breakpoint *b;
3495 CORE_ADDR dummy_addr = 0;
3498 if (args->bnum == b->number)
3500 print_one_breakpoint (b, &dummy_addr);
3508 gdb_breakpoint_query (struct ui_out *uiout, int bnum)
3510 struct captured_breakpoint_query_args args;
3512 /* For the moment we don't trust print_one_breakpoint() to not throw
3514 return catch_exceptions (uiout, do_captured_breakpoint_query, &args,
3515 NULL, RETURN_MASK_ALL);
3518 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3519 catchpoints, et.al.). */
3522 user_settable_breakpoint (const struct breakpoint *b)
3524 return (b->type == bp_breakpoint
3525 || b->type == bp_catch_load
3526 || b->type == bp_catch_unload
3527 || b->type == bp_catch_fork
3528 || b->type == bp_catch_vfork
3529 || b->type == bp_catch_exec
3530 || b->type == bp_catch_catch
3531 || b->type == bp_catch_throw
3532 || b->type == bp_hardware_breakpoint
3533 || b->type == bp_watchpoint
3534 || b->type == bp_read_watchpoint
3535 || b->type == bp_access_watchpoint
3536 || b->type == bp_hardware_watchpoint);
3539 /* Print information on user settable breakpoint (watchpoint, etc)
3540 number BNUM. If BNUM is -1 print all user settable breakpoints.
3541 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3544 breakpoint_1 (int bnum, int allflag)
3546 register struct breakpoint *b;
3547 CORE_ADDR last_addr = (CORE_ADDR) -1;
3548 int nr_printable_breakpoints;
3550 /* Compute the number of rows in the table. */
3551 nr_printable_breakpoints = 0;
3554 || bnum == b->number)
3556 if (allflag || user_settable_breakpoint (b))
3557 nr_printable_breakpoints++;
3561 ui_out_table_begin (uiout, 6, nr_printable_breakpoints, "BreakpointTable");
3563 ui_out_table_begin (uiout, 5, nr_printable_breakpoints, "BreakpointTable");
3565 if (nr_printable_breakpoints > 0)
3566 annotate_breakpoints_headers ();
3567 if (nr_printable_breakpoints > 0)
3569 ui_out_table_header (uiout, 3, ui_left, "number", "Num"); /* 1 */
3570 if (nr_printable_breakpoints > 0)
3572 ui_out_table_header (uiout, 14, ui_left, "type", "Type"); /* 2 */
3573 if (nr_printable_breakpoints > 0)
3575 ui_out_table_header (uiout, 4, ui_left, "disp", "Disp"); /* 3 */
3576 if (nr_printable_breakpoints > 0)
3578 ui_out_table_header (uiout, 3, ui_left, "enabled", "Enb"); /* 4 */
3581 if (nr_printable_breakpoints > 0)
3583 if (TARGET_ADDR_BIT <= 32)
3584 ui_out_table_header (uiout, 10, ui_left, "addr", "Address");/* 5 */
3586 ui_out_table_header (uiout, 18, ui_left, "addr", "Address");/* 5 */
3588 if (nr_printable_breakpoints > 0)
3590 ui_out_table_header (uiout, 40, ui_noalign, "what", "What"); /* 6 */
3591 ui_out_table_body (uiout);
3592 if (nr_printable_breakpoints > 0)
3593 annotate_breakpoints_table ();
3597 || bnum == b->number)
3599 /* We only print out user settable breakpoints unless the
3601 if (allflag || user_settable_breakpoint (b))
3602 print_one_breakpoint (b, &last_addr);
3605 ui_out_table_end (uiout);
3607 if (nr_printable_breakpoints == 0)
3610 ui_out_message (uiout, 0, "No breakpoints or watchpoints.\n");
3612 ui_out_message (uiout, 0, "No breakpoint or watchpoint number %d.\n",
3617 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3618 that a comparison of an unsigned with -1 is always false. */
3619 if (last_addr != (CORE_ADDR) -1)
3620 set_next_address (last_addr);
3623 /* FIXME? Should this be moved up so that it is only called when
3624 there have been breakpoints? */
3625 annotate_breakpoints_table_end ();
3630 breakpoints_info (char *bnum_exp, int from_tty)
3635 bnum = parse_and_eval_long (bnum_exp);
3637 breakpoint_1 (bnum, 0);
3642 maintenance_info_breakpoints (char *bnum_exp, int from_tty)
3647 bnum = parse_and_eval_long (bnum_exp);
3649 breakpoint_1 (bnum, 1);
3652 /* Print a message describing any breakpoints set at PC. */
3655 describe_other_breakpoints (CORE_ADDR pc, asection *section)
3657 register int others = 0;
3658 register struct breakpoint *b;
3661 if (b->address == pc) /* address match / overlay match */
3662 if (!overlay_debugging || b->section == section)
3666 printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : "");
3668 if (b->address == pc) /* address match / overlay match */
3669 if (!overlay_debugging || b->section == section)
3672 printf_filtered ("%d%s%s ",
3674 ((b->enable_state == bp_disabled ||
3675 b->enable_state == bp_shlib_disabled ||
3676 b->enable_state == bp_call_disabled)
3678 : b->enable_state == bp_permanent
3682 : ((others == 1) ? " and" : ""));
3684 printf_filtered ("also set at pc ");
3685 print_address_numeric (pc, 1, gdb_stdout);
3686 printf_filtered (".\n");
3690 /* Set the default place to put a breakpoint
3691 for the `break' command with no arguments. */
3694 set_default_breakpoint (int valid, CORE_ADDR addr, struct symtab *symtab,
3697 default_breakpoint_valid = valid;
3698 default_breakpoint_address = addr;
3699 default_breakpoint_symtab = symtab;
3700 default_breakpoint_line = line;
3703 /* Return true iff it is meaningful to use the address member of
3704 BPT. For some breakpoint types, the address member is irrelevant
3705 and it makes no sense to attempt to compare it to other addresses
3706 (or use it for any other purpose either).
3708 More specifically, each of the following breakpoint types will always
3709 have a zero valued address and we don't want check_duplicates() to mark
3710 breakpoints of any of these types to be a duplicate of an actual
3711 breakpoint at address zero:
3714 bp_hardware_watchpoint
3716 bp_access_watchpoint
3723 breakpoint_address_is_meaningful (struct breakpoint *bpt)
3725 enum bptype type = bpt->type;
3727 return (type != bp_watchpoint
3728 && type != bp_hardware_watchpoint
3729 && type != bp_read_watchpoint
3730 && type != bp_access_watchpoint
3731 && type != bp_catch_exec
3732 && type != bp_longjmp_resume
3733 && type != bp_catch_fork
3734 && type != bp_catch_vfork);
3737 /* Rescan breakpoints at the same address and section as BPT,
3738 marking the first one as "first" and any others as "duplicates".
3739 This is so that the bpt instruction is only inserted once.
3740 If we have a permanent breakpoint at the same place as BPT, make
3741 that one the official one, and the rest as duplicates. */
3744 check_duplicates (struct breakpoint *bpt)
3746 register struct breakpoint *b;
3747 register int count = 0;
3748 struct breakpoint *perm_bp = 0;
3749 CORE_ADDR address = bpt->address;
3750 asection *section = bpt->section;
3752 if (! breakpoint_address_is_meaningful (bpt))
3756 if (b->enable_state != bp_disabled
3757 && b->enable_state != bp_shlib_disabled
3758 && b->enable_state != bp_call_disabled
3759 && b->address == address /* address / overlay match */
3760 && (!overlay_debugging || b->section == section)
3761 && breakpoint_address_is_meaningful (b))
3763 /* Have we found a permanent breakpoint? */
3764 if (b->enable_state == bp_permanent)
3771 b->duplicate = count > 1;
3774 /* If we found a permanent breakpoint at this address, go over the
3775 list again and declare all the other breakpoints there to be the
3779 perm_bp->duplicate = 0;
3781 /* Permanent breakpoint should always be inserted. */
3782 if (! perm_bp->inserted)
3783 internal_error (__FILE__, __LINE__,
3784 "allegedly permanent breakpoint is not "
3785 "actually inserted");
3791 internal_error (__FILE__, __LINE__,
3792 "another breakpoint was inserted on top of "
3793 "a permanent breakpoint");
3795 if (b->enable_state != bp_disabled
3796 && b->enable_state != bp_shlib_disabled
3797 && b->enable_state != bp_call_disabled
3798 && b->address == address /* address / overlay match */
3799 && (!overlay_debugging || b->section == section)
3800 && breakpoint_address_is_meaningful (b))
3806 /* set_raw_breakpoint() is a low level routine for allocating and
3807 partially initializing a breakpoint of type BPTYPE. The newly
3808 created breakpoint's address, section, source file name, and line
3809 number are provided by SAL. The newly created and partially
3810 initialized breakpoint is added to the breakpoint chain and
3811 is also returned as the value of this function.
3813 It is expected that the caller will complete the initialization of
3814 the newly created breakpoint struct as well as output any status
3815 information regarding the creation of a new breakpoint. In
3816 particular, set_raw_breakpoint() does NOT set the breakpoint
3817 number! Care should be taken to not allow an error() to occur
3818 prior to completing the initialization of the breakpoint. If this
3819 should happen, a bogus breakpoint will be left on the chain. */
3822 set_raw_breakpoint (struct symtab_and_line sal, enum bptype bptype)
3824 register struct breakpoint *b, *b1;
3826 b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint));
3827 memset (b, 0, sizeof (*b));
3828 b->address = sal.pc;
3829 if (sal.symtab == NULL)
3830 b->source_file = NULL;
3832 b->source_file = savestring (sal.symtab->filename,
3833 strlen (sal.symtab->filename));
3834 b->section = sal.section;
3836 b->language = current_language->la_language;
3837 b->input_radix = input_radix;
3839 b->line_number = sal.line;
3840 b->enable_state = bp_enabled;
3843 b->ignore_count = 0;
3846 b->dll_pathname = NULL;
3847 b->triggered_dll_pathname = NULL;
3848 b->forked_inferior_pid = 0;
3849 b->exec_pathname = NULL;
3851 /* Add this breakpoint to the end of the chain
3852 so that a list of breakpoints will come out in order
3853 of increasing numbers. */
3855 b1 = breakpoint_chain;
3857 breakpoint_chain = b;
3865 check_duplicates (b);
3866 breakpoints_changed ();
3872 /* Note that the breakpoint object B describes a permanent breakpoint
3873 instruction, hard-wired into the inferior's code. */
3875 make_breakpoint_permanent (struct breakpoint *b)
3877 b->enable_state = bp_permanent;
3879 /* By definition, permanent breakpoints are already present in the code. */
3883 static struct breakpoint *
3884 create_internal_breakpoint (CORE_ADDR address, enum bptype type)
3886 static int internal_breakpoint_number = -1;
3887 struct symtab_and_line sal;
3888 struct breakpoint *b;
3890 init_sal (&sal); /* initialize to zeroes */
3893 sal.section = find_pc_overlay (sal.pc);
3895 b = set_raw_breakpoint (sal, type);
3896 b->number = internal_breakpoint_number--;
3897 b->disposition = disp_donttouch;
3904 create_longjmp_breakpoint (char *func_name)
3906 struct breakpoint *b;
3907 struct minimal_symbol *m;
3909 if (func_name == NULL)
3910 b = create_internal_breakpoint (0, bp_longjmp_resume);
3913 if ((m = lookup_minimal_symbol_text (func_name, NULL, NULL)) == NULL)
3916 b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m), bp_longjmp);
3919 b->enable_state = bp_disabled;
3922 b->addr_string = xstrdup (func_name);
3925 /* Call this routine when stepping and nexting to enable a breakpoint
3926 if we do a longjmp(). When we hit that breakpoint, call
3927 set_longjmp_resume_breakpoint() to figure out where we are going. */
3930 enable_longjmp_breakpoint (void)
3932 register struct breakpoint *b;
3935 if (b->type == bp_longjmp)
3937 b->enable_state = bp_enabled;
3938 check_duplicates (b);
3943 disable_longjmp_breakpoint (void)
3945 register struct breakpoint *b;
3948 if (b->type == bp_longjmp
3949 || b->type == bp_longjmp_resume)
3951 b->enable_state = bp_disabled;
3952 check_duplicates (b);
3957 create_overlay_event_breakpoint (char *func_name)
3959 struct breakpoint *b;
3960 struct minimal_symbol *m;
3962 if ((m = lookup_minimal_symbol_text (func_name, NULL, NULL)) == NULL)
3965 b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m),
3967 b->addr_string = xstrdup (func_name);
3969 if (overlay_debugging == ovly_auto)
3971 b->enable_state = bp_enabled;
3972 overlay_events_enabled = 1;
3976 b->enable_state = bp_disabled;
3977 overlay_events_enabled = 0;
3982 enable_overlay_breakpoints (void)
3984 register struct breakpoint *b;
3987 if (b->type == bp_overlay_event)
3989 b->enable_state = bp_enabled;
3990 check_duplicates (b);
3991 overlay_events_enabled = 1;
3996 disable_overlay_breakpoints (void)
3998 register struct breakpoint *b;
4001 if (b->type == bp_overlay_event)
4003 b->enable_state = bp_disabled;
4004 check_duplicates (b);
4005 overlay_events_enabled = 0;
4010 create_thread_event_breakpoint (CORE_ADDR address)
4012 struct breakpoint *b;
4014 b = create_internal_breakpoint (address, bp_thread_event);
4016 b->enable_state = bp_enabled;
4017 /* addr_string has to be used or breakpoint_re_set will delete me. */
4018 xasprintf (&b->addr_string, "*0x%s", paddr (b->address));
4024 remove_thread_event_breakpoints (void)
4026 struct breakpoint *b, *temp;
4028 ALL_BREAKPOINTS_SAFE (b, temp)
4029 if (b->type == bp_thread_event)
4030 delete_breakpoint (b);
4035 remove_solib_event_breakpoints (void)
4037 register struct breakpoint *b, *temp;
4039 ALL_BREAKPOINTS_SAFE (b, temp)
4040 if (b->type == bp_shlib_event)
4041 delete_breakpoint (b);
4045 create_solib_event_breakpoint (CORE_ADDR address)
4047 struct breakpoint *b;
4049 b = create_internal_breakpoint (address, bp_shlib_event);
4053 /* Disable any breakpoints that are on code in shared libraries. Only
4054 apply to enabled breakpoints, disabled ones can just stay disabled. */
4057 disable_breakpoints_in_shlibs (int silent)
4059 struct breakpoint *b;
4060 int disabled_shlib_breaks = 0;
4062 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4065 #if defined (PC_SOLIB)
4066 if (((b->type == bp_breakpoint) ||
4067 (b->type == bp_hardware_breakpoint)) &&
4068 b->enable_state == bp_enabled &&
4070 PC_SOLIB (b->address))
4072 b->enable_state = bp_shlib_disabled;
4075 if (!disabled_shlib_breaks)
4077 target_terminal_ours_for_output ();
4078 warning ("Temporarily disabling shared library breakpoints:");
4080 disabled_shlib_breaks = 1;
4081 warning ("breakpoint #%d ", b->number);
4088 /* Try to reenable any breakpoints in shared libraries. */
4090 re_enable_breakpoints_in_shlibs (void)
4092 struct breakpoint *b;
4095 if (b->enable_state == bp_shlib_disabled)
4099 /* Do not reenable the breakpoint if the shared library
4100 is still not mapped in. */
4101 if (target_read_memory (b->address, buf, 1) == 0)
4102 b->enable_state = bp_enabled;
4109 solib_load_unload_1 (char *hookname, int tempflag, char *dll_pathname,
4110 char *cond_string, enum bptype bp_kind)
4112 struct breakpoint *b;
4113 struct symtabs_and_lines sals;
4114 struct cleanup *old_chain;
4115 struct cleanup *canonical_strings_chain = NULL;
4116 char *addr_start = hookname;
4117 char *addr_end = NULL;
4118 char **canonical = (char **) NULL;
4119 int thread = -1; /* All threads. */
4121 /* Set a breakpoint on the specified hook. */
4122 sals = decode_line_1 (&hookname, 1, (struct symtab *) NULL, 0, &canonical);
4123 addr_end = hookname;
4125 if (sals.nelts == 0)
4127 warning ("Unable to set a breakpoint on dynamic linker callback.");
4128 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4129 warning ("GDB will be unable to track shl_load/shl_unload calls");
4132 if (sals.nelts != 1)
4134 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4135 warning ("GDB will be unable to track shl_load/shl_unload calls");
4139 /* Make sure that all storage allocated in decode_line_1 gets freed
4140 in case the following errors out. */
4141 old_chain = make_cleanup (xfree, sals.sals);
4142 if (canonical != (char **) NULL)
4144 make_cleanup (xfree, canonical);
4145 canonical_strings_chain = make_cleanup (null_cleanup, 0);
4146 if (canonical[0] != NULL)
4147 make_cleanup (xfree, canonical[0]);
4150 resolve_sal_pc (&sals.sals[0]);
4152 /* Remove the canonical strings from the cleanup, they are needed below. */
4153 if (canonical != (char **) NULL)
4154 discard_cleanups (canonical_strings_chain);
4156 b = set_raw_breakpoint (sals.sals[0], bp_kind);
4157 set_breakpoint_count (breakpoint_count + 1);
4158 b->number = breakpoint_count;
4160 b->cond_string = (cond_string == NULL) ?
4161 NULL : savestring (cond_string, strlen (cond_string));
4164 if (canonical != (char **) NULL && canonical[0] != NULL)
4165 b->addr_string = canonical[0];
4166 else if (addr_start)
4167 b->addr_string = savestring (addr_start, addr_end - addr_start);
4169 b->enable_state = bp_enabled;
4170 b->disposition = tempflag ? disp_del : disp_donttouch;
4172 if (dll_pathname == NULL)
4173 b->dll_pathname = NULL;
4176 b->dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1);
4177 strcpy (b->dll_pathname, dll_pathname);
4181 do_cleanups (old_chain);
4185 create_solib_load_event_breakpoint (char *hookname, int tempflag,
4186 char *dll_pathname, char *cond_string)
4188 solib_load_unload_1 (hookname, tempflag, dll_pathname,
4189 cond_string, bp_catch_load);
4193 create_solib_unload_event_breakpoint (char *hookname, int tempflag,
4194 char *dll_pathname, char *cond_string)
4196 solib_load_unload_1 (hookname,tempflag, dll_pathname,
4197 cond_string, bp_catch_unload);
4201 create_fork_vfork_event_catchpoint (int tempflag, char *cond_string,
4202 enum bptype bp_kind)
4204 struct symtab_and_line sal;
4205 struct breakpoint *b;
4206 int thread = -1; /* All threads. */
4213 b = set_raw_breakpoint (sal, bp_kind);
4214 set_breakpoint_count (breakpoint_count + 1);
4215 b->number = breakpoint_count;
4217 b->cond_string = (cond_string == NULL) ?
4218 NULL : savestring (cond_string, strlen (cond_string));
4220 b->addr_string = NULL;
4221 b->enable_state = bp_enabled;
4222 b->disposition = tempflag ? disp_del : disp_donttouch;
4223 b->forked_inferior_pid = 0;
4229 create_fork_event_catchpoint (int tempflag, char *cond_string)
4231 create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_fork);
4235 create_vfork_event_catchpoint (int tempflag, char *cond_string)
4237 create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_vfork);
4241 create_exec_event_catchpoint (int tempflag, char *cond_string)
4243 struct symtab_and_line sal;
4244 struct breakpoint *b;
4245 int thread = -1; /* All threads. */
4252 b = set_raw_breakpoint (sal, bp_catch_exec);
4253 set_breakpoint_count (breakpoint_count + 1);
4254 b->number = breakpoint_count;
4256 b->cond_string = (cond_string == NULL) ?
4257 NULL : savestring (cond_string, strlen (cond_string));
4259 b->addr_string = NULL;
4260 b->enable_state = bp_enabled;
4261 b->disposition = tempflag ? disp_del : disp_donttouch;
4267 hw_breakpoint_used_count (void)
4269 register struct breakpoint *b;
4274 if (b->type == bp_hardware_breakpoint && b->enable_state == bp_enabled)
4282 hw_watchpoint_used_count (enum bptype type, int *other_type_used)
4284 register struct breakpoint *b;
4287 *other_type_used = 0;
4290 if (b->enable_state == bp_enabled)
4292 if (b->type == type)
4294 else if ((b->type == bp_hardware_watchpoint ||
4295 b->type == bp_read_watchpoint ||
4296 b->type == bp_access_watchpoint)
4297 && b->enable_state == bp_enabled)
4298 *other_type_used = 1;
4304 /* Call this after hitting the longjmp() breakpoint. Use this to set
4305 a new breakpoint at the target of the jmp_buf.
4307 FIXME - This ought to be done by setting a temporary breakpoint
4308 that gets deleted automatically... */
4311 set_longjmp_resume_breakpoint (CORE_ADDR pc, struct frame_info *frame)
4313 register struct breakpoint *b;
4316 if (b->type == bp_longjmp_resume)
4319 b->enable_state = bp_enabled;
4321 b->frame = frame->frame;
4324 check_duplicates (b);
4330 disable_watchpoints_before_interactive_call_start (void)
4332 struct breakpoint *b;
4336 if (((b->type == bp_watchpoint)
4337 || (b->type == bp_hardware_watchpoint)
4338 || (b->type == bp_read_watchpoint)
4339 || (b->type == bp_access_watchpoint)
4340 || ep_is_exception_catchpoint (b))
4341 && (b->enable_state == bp_enabled))
4343 b->enable_state = bp_call_disabled;
4344 check_duplicates (b);
4350 enable_watchpoints_after_interactive_call_stop (void)
4352 struct breakpoint *b;
4356 if (((b->type == bp_watchpoint)
4357 || (b->type == bp_hardware_watchpoint)
4358 || (b->type == bp_read_watchpoint)
4359 || (b->type == bp_access_watchpoint)
4360 || ep_is_exception_catchpoint (b))
4361 && (b->enable_state == bp_call_disabled))
4363 b->enable_state = bp_enabled;
4364 check_duplicates (b);
4370 /* Set a breakpoint that will evaporate an end of command
4371 at address specified by SAL.
4372 Restrict it to frame FRAME if FRAME is nonzero. */
4375 set_momentary_breakpoint (struct symtab_and_line sal, struct frame_info *frame,
4378 register struct breakpoint *b;
4379 b = set_raw_breakpoint (sal, type);
4380 b->enable_state = bp_enabled;
4381 b->disposition = disp_donttouch;
4382 b->frame = (frame ? frame->frame : 0);
4384 /* If we're debugging a multi-threaded program, then we
4385 want momentary breakpoints to be active in only a
4386 single thread of control. */
4387 if (in_thread_list (inferior_ptid))
4388 b->thread = pid_to_thread_id (inferior_ptid);
4394 /* Tell the user we have just set a breakpoint B. */
4397 mention (struct breakpoint *b)
4400 struct cleanup *old_chain;
4401 struct ui_stream *stb;
4403 stb = ui_out_stream_new (uiout);
4404 old_chain = make_cleanup_ui_out_stream_delete (stb);
4406 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4407 watchpoint) other than breakpoint creation. It should be possible to
4408 clean this up and at the same time replace the random calls to
4409 breakpoint_changed with this hook, as has already been done for
4410 delete_breakpoint_hook and so on. */
4411 if (create_breakpoint_hook)
4412 create_breakpoint_hook (b);
4413 breakpoint_create_event (b->number);
4418 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b->number);
4421 ui_out_text (uiout, "Watchpoint ");
4422 ui_out_tuple_begin (uiout, "wpt");
4423 ui_out_field_int (uiout, "number", b->number);
4424 ui_out_text (uiout, ": ");
4425 print_expression (b->exp, stb->stream);
4426 ui_out_field_stream (uiout, "exp", stb);
4427 ui_out_tuple_end (uiout);
4429 case bp_hardware_watchpoint:
4430 ui_out_text (uiout, "Hardware watchpoint ");
4431 ui_out_tuple_begin (uiout, "wpt");
4432 ui_out_field_int (uiout, "number", b->number);
4433 ui_out_text (uiout, ": ");
4434 print_expression (b->exp, stb->stream);
4435 ui_out_field_stream (uiout, "exp", stb);
4436 ui_out_tuple_end (uiout);
4438 case bp_read_watchpoint:
4439 ui_out_text (uiout, "Hardware read watchpoint ");
4440 ui_out_tuple_begin (uiout, "hw-rwpt");
4441 ui_out_field_int (uiout, "number", b->number);
4442 ui_out_text (uiout, ": ");
4443 print_expression (b->exp, stb->stream);
4444 ui_out_field_stream (uiout, "exp", stb);
4445 ui_out_tuple_end (uiout);
4447 case bp_access_watchpoint:
4448 ui_out_text (uiout, "Hardware access (read/write) watchpoint ");
4449 ui_out_tuple_begin (uiout, "hw-awpt");
4450 ui_out_field_int (uiout, "number", b->number);
4451 ui_out_text (uiout, ": ");
4452 print_expression (b->exp, stb->stream);
4453 ui_out_field_stream (uiout, "exp", stb);
4454 ui_out_tuple_end (uiout);
4457 if (ui_out_is_mi_like_p (uiout))
4462 printf_filtered ("Breakpoint %d", b->number);
4465 case bp_hardware_breakpoint:
4466 if (ui_out_is_mi_like_p (uiout))
4471 printf_filtered ("Hardware assisted breakpoint %d", b->number);
4475 case bp_catch_unload:
4476 printf_filtered ("Catchpoint %d (%s %s)",
4478 (b->type == bp_catch_load) ? "load" : "unload",
4479 (b->dll_pathname != NULL) ?
4480 b->dll_pathname : "<any library>");
4483 case bp_catch_vfork:
4484 printf_filtered ("Catchpoint %d (%s)",
4486 (b->type == bp_catch_fork) ? "fork" : "vfork");
4489 printf_filtered ("Catchpoint %d (exec)",
4492 case bp_catch_catch:
4493 case bp_catch_throw:
4494 printf_filtered ("Catchpoint %d (%s)",
4496 (b->type == bp_catch_catch) ? "catch" : "throw");
4502 case bp_longjmp_resume:
4503 case bp_step_resume:
4504 case bp_through_sigtramp:
4506 case bp_watchpoint_scope:
4507 case bp_shlib_event:
4508 case bp_thread_event:
4509 case bp_overlay_event:
4514 if (addressprint || b->source_file == NULL)
4516 printf_filtered (" at ");
4517 print_address_numeric (b->address, 1, gdb_stdout);
4520 printf_filtered (": file %s, line %d.",
4521 b->source_file, b->line_number);
4523 do_cleanups (old_chain);
4524 if (ui_out_is_mi_like_p (uiout))
4526 printf_filtered ("\n");
4530 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4531 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4532 COND[i] and COND_STRING[i] values.
4534 NOTE: If the function succeeds, the caller is expected to cleanup
4535 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4536 array contents). If the function fails (error() is called), the
4537 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4538 COND and SALS arrays and each of those arrays contents. */
4541 create_breakpoints (struct symtabs_and_lines sals, char **addr_string,
4542 struct expression **cond, char **cond_string,
4543 enum bptype type, enum bpdisp disposition,
4544 int thread, int ignore_count, int from_tty)
4546 if (type == bp_hardware_breakpoint)
4548 int i = hw_breakpoint_used_count ();
4549 int target_resources_ok =
4550 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,
4552 if (target_resources_ok == 0)
4553 error ("No hardware breakpoint support in the target.");
4554 else if (target_resources_ok < 0)
4555 error ("Hardware breakpoints used exceeds limit.");
4558 /* Now set all the breakpoints. */
4561 for (i = 0; i < sals.nelts; i++)
4563 struct breakpoint *b;
4564 struct symtab_and_line sal = sals.sals[i];
4567 describe_other_breakpoints (sal.pc, sal.section);
4569 b = set_raw_breakpoint (sal, type);
4570 set_breakpoint_count (breakpoint_count + 1);
4571 b->number = breakpoint_count;
4575 b->addr_string = addr_string[i];
4577 /* addr_string has to be used or breakpoint_re_set will delete
4579 xasprintf (&b->addr_string, "*0x%s", paddr (b->address));
4580 b->cond_string = cond_string[i];
4581 b->ignore_count = ignore_count;
4582 b->enable_state = bp_enabled;
4583 b->disposition = disposition;
4589 /* Parse ARG which is assumed to be a SAL specification possibly
4590 followed by conditionals. On return, SALS contains an array of SAL
4591 addresses found. ADDR_STRING contains a vector of (canonical)
4592 address strings. ARG points to the end of the SAL. */
4595 parse_breakpoint_sals (char **address,
4596 struct symtabs_and_lines *sals,
4597 char ***addr_string)
4599 char *addr_start = *address;
4600 *addr_string = NULL;
4601 /* If no arg given, or if first arg is 'if ', use the default
4603 if ((*address) == NULL
4604 || (strncmp ((*address), "if", 2) == 0 && isspace ((*address)[2])))
4606 if (default_breakpoint_valid)
4608 struct symtab_and_line sal;
4609 init_sal (&sal); /* initialize to zeroes */
4610 sals->sals = (struct symtab_and_line *)
4611 xmalloc (sizeof (struct symtab_and_line));
4612 sal.pc = default_breakpoint_address;
4613 sal.line = default_breakpoint_line;
4614 sal.symtab = default_breakpoint_symtab;
4615 sal.section = find_pc_overlay (sal.pc);
4616 sals->sals[0] = sal;
4620 error ("No default breakpoint address now.");
4624 /* Force almost all breakpoints to be in terms of the
4625 current_source_symtab (which is decode_line_1's default). This
4626 should produce the results we want almost all of the time while
4627 leaving default_breakpoint_* alone.
4628 ObjC: However, don't match an Objective-C method name which
4629 may have a '+' or '-' succeeded by a '[' */
4631 struct symtab_and_line cursal = get_current_source_symtab_and_line ();
4633 if (default_breakpoint_valid
4635 || ((strchr ("+-", (*address)[0]) != NULL)
4636 && ((*address)[1] != '['))))
4637 *sals = decode_line_1 (address, 1, default_breakpoint_symtab,
4638 default_breakpoint_line, addr_string);
4640 *sals = decode_line_1 (address, 1, (struct symtab *) NULL, 0, addr_string);
4642 /* For any SAL that didn't have a canonical string, fill one in. */
4643 if (sals->nelts > 0 && *addr_string == NULL)
4644 *addr_string = xcalloc (sals->nelts, sizeof (char **));
4645 if (addr_start != (*address))
4648 for (i = 0; i < sals->nelts; i++)
4650 /* Add the string if not present. */
4651 if ((*addr_string)[i] == NULL)
4652 (*addr_string)[i] = savestring (addr_start, (*address) - addr_start);
4658 /* Convert each SAL into a real PC. Verify that the PC can be
4659 inserted as a breakpoint. If it can't throw an error. */
4662 breakpoint_sals_to_pc (struct symtabs_and_lines *sals,
4666 for (i = 0; i < sals->nelts; i++)
4668 resolve_sal_pc (&sals->sals[i]);
4670 /* It's possible for the PC to be nonzero, but still an illegal
4671 value on some targets.
4673 For example, on HP-UX if you start gdb, and before running the
4674 inferior you try to set a breakpoint on a shared library function
4675 "foo" where the inferior doesn't call "foo" directly but does
4676 pass its address to another function call, then we do find a
4677 minimal symbol for the "foo", but it's address is invalid.
4678 (Appears to be an index into a table that the loader sets up
4679 when the inferior is run.)
4681 Give the target a chance to bless sals.sals[i].pc before we
4682 try to make a breakpoint for it. */
4683 if (PC_REQUIRES_RUN_BEFORE_USE (sals->sals[i].pc))
4685 if (address == NULL)
4686 error ("Cannot break without a running program.");
4688 error ("Cannot break on %s without a running program.",
4694 /* Set a breakpoint according to ARG (function, linenum or *address)
4695 flag: first bit : 0 non-temporary, 1 temporary.
4696 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4699 break_command_1 (char *arg, int flag, int from_tty)
4701 int tempflag, hardwareflag;
4702 struct symtabs_and_lines sals;
4703 register struct expression **cond = 0;
4704 /* Pointers in arg to the start, and one past the end, of the
4706 char **cond_string = (char **) NULL;
4707 char *addr_start = arg;
4709 struct cleanup *old_chain;
4710 struct cleanup *breakpoint_chain = NULL;
4713 int ignore_count = 0;
4715 hardwareflag = flag & BP_HARDWAREFLAG;
4716 tempflag = flag & BP_TEMPFLAG;
4721 parse_breakpoint_sals (&arg, &sals, &addr_string);
4726 /* Create a chain of things that always need to be cleaned up. */
4727 old_chain = make_cleanup (null_cleanup, 0);
4729 /* Make sure that all storage allocated to SALS gets freed. */
4730 make_cleanup (xfree, sals.sals);
4732 /* Cleanup the addr_string array but not its contents. */
4733 make_cleanup (xfree, addr_string);
4735 /* Allocate space for all the cond expressions. */
4736 cond = xcalloc (sals.nelts, sizeof (struct expression *));
4737 make_cleanup (xfree, cond);
4739 /* Allocate space for all the cond strings. */
4740 cond_string = xcalloc (sals.nelts, sizeof (char **));
4741 make_cleanup (xfree, cond_string);
4743 /* ----------------------------- SNIP -----------------------------
4744 Anything added to the cleanup chain beyond this point is assumed
4745 to be part of a breakpoint. If the breakpoint create succeeds
4746 then the memory is not reclaimed. */
4747 breakpoint_chain = make_cleanup (null_cleanup, 0);
4749 /* Mark the contents of the addr_string for cleanup. These go on
4750 the breakpoint_chain and only occure if the breakpoint create
4752 for (i = 0; i < sals.nelts; i++)
4754 if (addr_string[i] != NULL)
4755 make_cleanup (xfree, addr_string[i]);
4758 /* Resolve all line numbers to PC's and verify that the addresses
4759 are ok for the target. */
4760 breakpoint_sals_to_pc (&sals, addr_start);
4762 /* Verify that condition can be parsed, before setting any
4763 breakpoints. Allocate a separate condition expression for each
4765 thread = -1; /* No specific thread yet */
4766 for (i = 0; i < sals.nelts; i++)
4773 char *cond_start = NULL;
4774 char *cond_end = NULL;
4775 while (*tok == ' ' || *tok == '\t')
4780 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
4783 toklen = end_tok - tok;
4785 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
4787 tok = cond_start = end_tok + 1;
4788 cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
4789 make_cleanup (xfree, cond[i]);
4791 cond_string[i] = savestring (cond_start, cond_end - cond_start);
4792 make_cleanup (xfree, cond_string[i]);
4794 else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
4800 thread = strtol (tok, &tok, 0);
4802 error ("Junk after thread keyword.");
4803 if (!valid_thread_id (thread))
4804 error ("Unknown thread %d\n", thread);
4807 error ("Junk at end of arguments.");
4811 create_breakpoints (sals, addr_string, cond, cond_string,
4812 hardwareflag ? bp_hardware_breakpoint : bp_breakpoint,
4813 tempflag ? disp_del : disp_donttouch,
4814 thread, ignore_count, from_tty);
4818 warning ("Multiple breakpoints were set.");
4819 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
4821 /* That's it. Discard the cleanups for data inserted into the
4823 discard_cleanups (breakpoint_chain);
4824 /* But cleanup everything else. */
4825 do_cleanups (old_chain);
4828 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
4829 linenum or *address) with COND and IGNORE_COUNT. */
4831 struct captured_breakpoint_args
4842 do_captured_breakpoint (void *data)
4844 struct captured_breakpoint_args *args = data;
4845 struct symtabs_and_lines sals;
4846 register struct expression **cond;
4847 struct cleanup *old_chain;
4848 struct cleanup *breakpoint_chain = NULL;
4855 /* Parse the source and lines spec. Delay check that the expression
4856 didn't contain trailing garbage until after cleanups are in
4860 address_end = args->address;
4862 parse_breakpoint_sals (&address_end, &sals, &addr_string);
4867 /* Create a chain of things at always need to be cleaned up. */
4868 old_chain = make_cleanup (null_cleanup, 0);
4870 /* Always have a addr_string array, even if it is empty. */
4871 make_cleanup (xfree, addr_string);
4873 /* Make sure that all storage allocated to SALS gets freed. */
4874 make_cleanup (xfree, sals.sals);
4876 /* Allocate space for all the cond expressions. */
4877 cond = xcalloc (sals.nelts, sizeof (struct expression *));
4878 make_cleanup (xfree, cond);
4880 /* Allocate space for all the cond strings. */
4881 cond_string = xcalloc (sals.nelts, sizeof (char **));
4882 make_cleanup (xfree, cond_string);
4884 /* ----------------------------- SNIP -----------------------------
4885 Anything added to the cleanup chain beyond this point is assumed
4886 to be part of a breakpoint. If the breakpoint create goes
4887 through then that memory is not cleaned up. */
4888 breakpoint_chain = make_cleanup (null_cleanup, 0);
4890 /* Mark the contents of the addr_string for cleanup. These go on
4891 the breakpoint_chain and only occure if the breakpoint create
4893 for (i = 0; i < sals.nelts; i++)
4895 if (addr_string[i] != NULL)
4896 make_cleanup (xfree, addr_string[i]);
4899 /* Wait until now before checking for garbage at the end of the
4900 address. That way cleanups can take care of freeing any
4902 if (*address_end != '\0')
4903 error ("Garbage %s following breakpoint address", address_end);
4905 /* Resolve all line numbers to PC's. */
4906 breakpoint_sals_to_pc (&sals, args->address);
4908 /* Verify that conditions can be parsed, before setting any
4910 for (i = 0; i < sals.nelts; i++)
4912 if (args->condition != NULL)
4914 char *tok = args->condition;
4915 cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
4917 error ("Garbage %s follows condition", tok);
4918 make_cleanup (xfree, cond[i]);
4919 cond_string[i] = xstrdup (args->condition);
4923 create_breakpoints (sals, addr_string, cond, cond_string,
4924 args->hardwareflag ? bp_hardware_breakpoint : bp_breakpoint,
4925 args->tempflag ? disp_del : disp_donttouch,
4926 args->thread, args->ignore_count, 0/*from-tty*/);
4928 /* That's it. Discard the cleanups for data inserted into the
4930 discard_cleanups (breakpoint_chain);
4931 /* But cleanup everything else. */
4932 do_cleanups (old_chain);
4937 gdb_breakpoint (char *address, char *condition,
4938 int hardwareflag, int tempflag,
4939 int thread, int ignore_count)
4941 struct captured_breakpoint_args args;
4942 args.address = address;
4943 args.condition = condition;
4944 args.hardwareflag = hardwareflag;
4945 args.tempflag = tempflag;
4946 args.thread = thread;
4947 args.ignore_count = ignore_count;
4948 return catch_errors (do_captured_breakpoint, &args,
4949 NULL, RETURN_MASK_ALL);
4954 break_at_finish_at_depth_command_1 (char *arg, int flag, int from_tty)
4956 struct frame_info *frame;
4957 CORE_ADDR low, high, selected_pc = 0;
4958 char *extra_args = NULL;
4961 int extra_args_len = 0, if_arg = 0;
4964 (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
4967 if (default_breakpoint_valid)
4969 if (deprecated_selected_frame)
4971 selected_pc = deprecated_selected_frame->pc;
4976 error ("No selected frame.");
4979 error ("No default breakpoint address now.");
4983 extra_args = strchr (arg, ' ');
4987 extra_args_len = strlen (extra_args);
4988 level_arg = (char *) xmalloc (extra_args - arg);
4989 strncpy (level_arg, arg, extra_args - arg - 1);
4990 level_arg[extra_args - arg - 1] = '\0';
4994 level_arg = (char *) xmalloc (strlen (arg) + 1);
4995 strcpy (level_arg, arg);
4998 frame = parse_frame_specification (level_arg);
5000 selected_pc = frame->pc;
5007 extra_args_len = strlen (arg);
5012 if (find_pc_partial_function (selected_pc, (char **) NULL, &low, &high))
5014 addr_string = (char *) xmalloc (26 + extra_args_len);
5016 sprintf (addr_string, "*0x%s %s", paddr_nz (high), extra_args);
5018 sprintf (addr_string, "*0x%s", paddr_nz (high));
5019 break_command_1 (addr_string, flag, from_tty);
5020 xfree (addr_string);
5023 error ("No function contains the specified address");
5026 error ("Unable to set breakpoint at procedure exit");
5031 break_at_finish_command_1 (char *arg, int flag, int from_tty)
5033 char *addr_string, *break_string, *beg_addr_string;
5034 CORE_ADDR low, high;
5035 struct symtabs_and_lines sals;
5036 struct symtab_and_line sal;
5037 struct cleanup *old_chain;
5038 char *extra_args = NULL;
5039 int extra_args_len = 0;
5043 (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
5045 if (default_breakpoint_valid)
5047 if (deprecated_selected_frame)
5049 addr_string = (char *) xmalloc (15);
5050 sprintf (addr_string, "*0x%s", paddr_nz (deprecated_selected_frame->pc));
5055 error ("No selected frame.");
5058 error ("No default breakpoint address now.");
5062 addr_string = (char *) xmalloc (strlen (arg) + 1);
5063 strcpy (addr_string, arg);
5069 extra_args_len = strlen (arg);
5073 /* get the stuff after the function name or address */
5074 extra_args = strchr (arg, ' ');
5078 extra_args_len = strlen (extra_args);
5085 beg_addr_string = addr_string;
5086 sals = decode_line_1 (&addr_string, 1, (struct symtab *) NULL, 0,
5089 xfree (beg_addr_string);
5090 old_chain = make_cleanup (xfree, sals.sals);
5091 for (i = 0; (i < sals.nelts); i++)
5094 if (find_pc_partial_function (sal.pc, (char **) NULL, &low, &high))
5096 break_string = (char *) xmalloc (extra_args_len + 26);
5098 sprintf (break_string, "*0x%s %s", paddr_nz (high), extra_args);
5100 sprintf (break_string, "*0x%s", paddr_nz (high));
5101 break_command_1 (break_string, flag, from_tty);
5102 xfree (break_string);
5105 error ("No function contains the specified address");
5109 warning ("Multiple breakpoints were set.\n");
5110 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5112 do_cleanups (old_chain);
5116 /* Helper function for break_command_1 and disassemble_command. */
5119 resolve_sal_pc (struct symtab_and_line *sal)
5123 if (sal->pc == 0 && sal->symtab != NULL)
5125 if (!find_line_pc (sal->symtab, sal->line, &pc))
5126 error ("No line %d in file \"%s\".",
5127 sal->line, sal->symtab->filename);
5131 if (sal->section == 0 && sal->symtab != NULL)
5133 struct blockvector *bv;
5138 bv = blockvector_for_pc_sect (sal->pc, 0, &index, sal->symtab);
5141 b = BLOCKVECTOR_BLOCK (bv, index);
5142 sym = block_function (b);
5145 fixup_symbol_section (sym, sal->symtab->objfile);
5146 sal->section = SYMBOL_BFD_SECTION (sym);
5150 /* It really is worthwhile to have the section, so we'll just
5151 have to look harder. This case can be executed if we have
5152 line numbers but no functions (as can happen in assembly
5155 struct minimal_symbol *msym;
5157 msym = lookup_minimal_symbol_by_pc (sal->pc);
5159 sal->section = SYMBOL_BFD_SECTION (msym);
5166 break_command (char *arg, int from_tty)
5168 break_command_1 (arg, 0, from_tty);
5172 break_at_finish_command (char *arg, int from_tty)
5174 break_at_finish_command_1 (arg, 0, from_tty);
5178 break_at_finish_at_depth_command (char *arg, int from_tty)
5180 break_at_finish_at_depth_command_1 (arg, 0, from_tty);
5184 tbreak_command (char *arg, int from_tty)
5186 break_command_1 (arg, BP_TEMPFLAG, from_tty);
5190 tbreak_at_finish_command (char *arg, int from_tty)
5192 break_at_finish_command_1 (arg, BP_TEMPFLAG, from_tty);
5196 hbreak_command (char *arg, int from_tty)
5198 break_command_1 (arg, BP_HARDWAREFLAG, from_tty);
5202 thbreak_command (char *arg, int from_tty)
5204 break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty);
5208 stop_command (char *arg, int from_tty)
5210 printf_filtered ("Specify the type of breakpoint to set.\n\
5211 Usage: stop in <function | address>\n\
5216 stopin_command (char *arg, int from_tty)
5220 if (arg == (char *) NULL)
5222 else if (*arg != '*')
5227 /* look for a ':'. If this is a line number specification, then
5228 say it is bad, otherwise, it should be an address or
5229 function/method name */
5230 while (*argptr && !hasColon)
5232 hasColon = (*argptr == ':');
5237 badInput = (*argptr != ':'); /* Not a class::method */
5239 badInput = isdigit (*arg); /* a simple line number */
5243 printf_filtered ("Usage: stop in <function | address>\n");
5245 break_command_1 (arg, 0, from_tty);
5249 stopat_command (char *arg, int from_tty)
5253 if (arg == (char *) NULL || *arg == '*') /* no line number */
5260 /* look for a ':'. If there is a '::' then get out, otherwise
5261 it is probably a line number. */
5262 while (*argptr && !hasColon)
5264 hasColon = (*argptr == ':');
5269 badInput = (*argptr == ':'); /* we have class::method */
5271 badInput = !isdigit (*arg); /* not a line number */
5275 printf_filtered ("Usage: stop at <line>\n");
5277 break_command_1 (arg, 0, from_tty);
5281 /* accessflag: hw_write: watch write,
5282 hw_read: watch read,
5283 hw_access: watch access (read or write) */
5285 watch_command_1 (char *arg, int accessflag, int from_tty)
5287 struct breakpoint *b;
5288 struct symtab_and_line sal;
5289 struct expression *exp;
5290 struct block *exp_valid_block;
5291 struct value *val, *mark;
5292 struct frame_info *frame;
5293 struct frame_info *prev_frame = NULL;
5294 char *exp_start = NULL;
5295 char *exp_end = NULL;
5296 char *tok, *end_tok;
5298 char *cond_start = NULL;
5299 char *cond_end = NULL;
5300 struct expression *cond = NULL;
5301 int i, other_type_used, target_resources_ok = 0;
5302 enum bptype bp_type;
5305 init_sal (&sal); /* initialize to zeroes */
5307 /* Parse arguments. */
5308 innermost_block = NULL;
5310 exp = parse_exp_1 (&arg, 0, 0);
5312 exp_valid_block = innermost_block;
5313 mark = value_mark ();
5314 val = evaluate_expression (exp);
5315 release_value (val);
5316 if (VALUE_LAZY (val))
5317 value_fetch_lazy (val);
5320 while (*tok == ' ' || *tok == '\t')
5324 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
5327 toklen = end_tok - tok;
5328 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
5330 tok = cond_start = end_tok + 1;
5331 cond = parse_exp_1 (&tok, 0, 0);
5335 error ("Junk at end of command.");
5337 if (accessflag == hw_read)
5338 bp_type = bp_read_watchpoint;
5339 else if (accessflag == hw_access)
5340 bp_type = bp_access_watchpoint;
5342 bp_type = bp_hardware_watchpoint;
5344 mem_cnt = can_use_hardware_watchpoint (val);
5345 if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint)
5346 error ("Expression cannot be implemented with read/access watchpoint.");
5349 i = hw_watchpoint_used_count (bp_type, &other_type_used);
5350 target_resources_ok =
5351 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type, i + mem_cnt,
5353 if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint)
5354 error ("Target does not support this type of hardware watchpoint.");
5356 if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint)
5357 error ("Target can only support one kind of HW watchpoint at a time.");
5360 #if defined(HPUXHPPA)
5361 /* On HP-UX if you set a h/w
5362 watchpoint before the "run" command, the inferior dies with a e.g.,
5363 SIGILL once you start it. I initially believed this was due to a
5364 bad interaction between page protection traps and the initial
5365 startup sequence by the dynamic linker.
5367 However, I tried avoiding that by having HP-UX's implementation of
5368 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5369 yet, which forced slow watches before a "run" or "attach", and it
5370 still fails somewhere in the startup code.
5372 Until I figure out what's happening, I'm disallowing watches altogether
5373 before the "run" or "attach" command. We'll tell the user they must
5374 set watches after getting the program started. */
5375 if (!target_has_execution)
5377 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5380 #endif /* HPUXHPPA */
5382 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5383 watchpoint could not be set. */
5384 if (!mem_cnt || target_resources_ok <= 0)
5385 bp_type = bp_watchpoint;
5387 /* Now set up the breakpoint. */
5388 b = set_raw_breakpoint (sal, bp_type);
5389 set_breakpoint_count (breakpoint_count + 1);
5390 b->number = breakpoint_count;
5391 b->disposition = disp_donttouch;
5393 b->exp_valid_block = exp_valid_block;
5394 b->exp_string = savestring (exp_start, exp_end - exp_start);
5398 b->cond_string = savestring (cond_start, cond_end - cond_start);
5402 frame = block_innermost_frame (exp_valid_block);
5405 prev_frame = get_prev_frame (frame);
5406 b->watchpoint_frame = get_frame_id (frame);
5410 memset (&b->watchpoint_frame, 0, sizeof (b->watchpoint_frame));
5413 /* If the expression is "local", then set up a "watchpoint scope"
5414 breakpoint at the point where we've left the scope of the watchpoint
5416 if (innermost_block)
5420 struct breakpoint *scope_breakpoint;
5421 scope_breakpoint = create_internal_breakpoint (get_frame_pc (prev_frame),
5422 bp_watchpoint_scope);
5424 scope_breakpoint->enable_state = bp_enabled;
5426 /* Automatically delete the breakpoint when it hits. */
5427 scope_breakpoint->disposition = disp_del;
5429 /* Only break in the proper frame (help with recursion). */
5430 scope_breakpoint->frame = prev_frame->frame;
5432 /* Set the address at which we will stop. */
5433 scope_breakpoint->address = get_frame_pc (prev_frame);
5435 /* The scope breakpoint is related to the watchpoint. We
5436 will need to act on them together. */
5437 b->related_breakpoint = scope_breakpoint;
5440 value_free_to_mark (mark);
5444 /* Return count of locations need to be watched and can be handled
5445 in hardware. If the watchpoint can not be handled
5446 in hardware return zero. */
5448 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5449 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5450 ((BYTE_SIZE) <= (REGISTER_SIZE))
5453 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5454 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5455 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5459 can_use_hardware_watchpoint (struct value *v)
5461 int found_memory_cnt = 0;
5462 struct value *head = v;
5464 /* Did the user specifically forbid us to use hardware watchpoints? */
5465 if (!can_use_hw_watchpoints)
5468 /* Make sure that the value of the expression depends only upon
5469 memory contents, and values computed from them within GDB. If we
5470 find any register references or function calls, we can't use a
5471 hardware watchpoint.
5473 The idea here is that evaluating an expression generates a series
5474 of values, one holding the value of every subexpression. (The
5475 expression a*b+c has five subexpressions: a, b, a*b, c, and
5476 a*b+c.) GDB's values hold almost enough information to establish
5477 the criteria given above --- they identify memory lvalues,
5478 register lvalues, computed values, etcetera. So we can evaluate
5479 the expression, and then scan the chain of values that leaves
5480 behind to decide whether we can detect any possible change to the
5481 expression's final value using only hardware watchpoints.
5483 However, I don't think that the values returned by inferior
5484 function calls are special in any way. So this function may not
5485 notice that an expression involving an inferior function call
5486 can't be watched with hardware watchpoints. FIXME. */
5487 for (; v; v = v->next)
5489 if (VALUE_LVAL (v) == lval_memory)
5492 /* A lazy memory lvalue is one that GDB never needed to fetch;
5493 we either just used its address (e.g., `a' in `a.b') or
5494 we never needed it at all (e.g., `a' in `a,b'). */
5498 /* Ahh, memory we actually used! Check if we can cover
5499 it with hardware watchpoints. */
5500 struct type *vtype = check_typedef (VALUE_TYPE (v));
5502 /* We only watch structs and arrays if user asked for it
5503 explicitly, never if they just happen to appear in a
5504 middle of some value chain. */
5506 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
5507 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
5509 CORE_ADDR vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
5510 int len = TYPE_LENGTH (VALUE_TYPE (v));
5512 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr, len))
5519 else if (v->lval != not_lval && v->modifiable == 0)
5520 return 0; /* ??? What does this represent? */
5521 else if (v->lval == lval_register)
5522 return 0; /* cannot watch a register with a HW watchpoint */
5525 /* The expression itself looks suitable for using a hardware
5526 watchpoint, but give the target machine a chance to reject it. */
5527 return found_memory_cnt;
5531 watch_command_wrapper (char *arg, int from_tty)
5533 watch_command (arg, from_tty);
5537 watch_command (char *arg, int from_tty)
5539 watch_command_1 (arg, hw_write, from_tty);
5543 rwatch_command_wrapper (char *arg, int from_tty)
5545 rwatch_command (arg, from_tty);
5549 rwatch_command (char *arg, int from_tty)
5551 watch_command_1 (arg, hw_read, from_tty);
5555 awatch_command_wrapper (char *arg, int from_tty)
5557 awatch_command (arg, from_tty);
5561 awatch_command (char *arg, int from_tty)
5563 watch_command_1 (arg, hw_access, from_tty);
5567 /* Helper routines for the until_command routine in infcmd.c. Here
5568 because it uses the mechanisms of breakpoints. */
5570 /* This function is called by fetch_inferior_event via the
5571 cmd_continuation pointer, to complete the until command. It takes
5572 care of cleaning up the temporary breakpoints set up by the until
5575 until_break_command_continuation (struct continuation_arg *arg)
5577 struct cleanup *cleanups;
5579 cleanups = (struct cleanup *) arg->data.pointer;
5580 do_exec_cleanups (cleanups);
5585 until_break_command (char *arg, int from_tty)
5587 struct symtabs_and_lines sals;
5588 struct symtab_and_line sal;
5589 struct frame_info *prev_frame = get_prev_frame (deprecated_selected_frame);
5590 struct breakpoint *breakpoint;
5591 struct cleanup *old_chain;
5592 struct continuation_arg *arg1;
5595 clear_proceed_status ();
5597 /* Set a breakpoint where the user wants it and at return from
5600 if (default_breakpoint_valid)
5601 sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
5602 default_breakpoint_line, (char ***) NULL);
5604 sals = decode_line_1 (&arg, 1, (struct symtab *) NULL,
5605 0, (char ***) NULL);
5607 if (sals.nelts != 1)
5608 error ("Couldn't get information on specified line.");
5611 xfree (sals.sals); /* malloc'd, so freed */
5614 error ("Junk at end of arguments.");
5616 resolve_sal_pc (&sal);
5618 breakpoint = set_momentary_breakpoint (sal, deprecated_selected_frame, bp_until);
5620 if (!event_loop_p || !target_can_async_p ())
5621 old_chain = make_cleanup_delete_breakpoint (breakpoint);
5623 old_chain = make_exec_cleanup_delete_breakpoint (breakpoint);
5625 /* If we are running asynchronously, and the target supports async
5626 execution, we are not waiting for the target to stop, in the call
5627 tp proceed, below. This means that we cannot delete the
5628 brekpoints until the target has actually stopped. The only place
5629 where we get a chance to do that is in fetch_inferior_event, so
5630 we must set things up for that. */
5632 if (event_loop_p && target_can_async_p ())
5634 /* In this case the arg for the continuation is just the point
5635 in the exec_cleanups chain from where to start doing
5636 cleanups, because all the continuation does is the cleanups in
5637 the exec_cleanup_chain. */
5639 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
5641 arg1->data.pointer = old_chain;
5643 add_continuation (until_break_command_continuation, arg1);
5646 /* Keep within the current frame */
5650 sal = find_pc_line (prev_frame->pc, 0);
5651 sal.pc = prev_frame->pc;
5652 breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until);
5653 if (!event_loop_p || !target_can_async_p ())
5654 make_cleanup_delete_breakpoint (breakpoint);
5656 make_exec_cleanup_delete_breakpoint (breakpoint);
5659 proceed (-1, TARGET_SIGNAL_DEFAULT, 0);
5660 /* Do the cleanups now, anly if we are not running asynchronously,
5661 of if we are, but the target is still synchronous. */
5662 if (!event_loop_p || !target_can_async_p ())
5663 do_cleanups (old_chain);
5667 /* These aren't used; I don't konw what they were for. */
5668 /* Set a breakpoint at the catch clause for NAME. */
5670 catch_breakpoint (char *name)
5675 disable_catch_breakpoint (void)
5680 delete_catch_breakpoint (void)
5685 enable_catch_breakpoint (void)
5692 struct sal_chain *next;
5693 struct symtab_and_line sal;
5697 /* Not really used -- invocation in handle_gnu_4_16_catch_command
5698 had been commented out in the v.4.16 sources, and stays
5699 disabled there now because "catch NAME" syntax isn't allowed.
5701 /* This isn't used; I don't know what it was for. */
5702 /* For each catch clause identified in ARGS, run FUNCTION
5703 with that clause as an argument. */
5704 static struct symtabs_and_lines
5705 map_catch_names (char *args, int (*function) ())
5707 register char *p = args;
5709 struct symtabs_and_lines sals;
5711 struct sal_chain *sal_chain = 0;
5715 error_no_arg ("one or more catch names");
5723 /* Don't swallow conditional part. */
5724 if (p1[0] == 'i' && p1[1] == 'f'
5725 && (p1[2] == ' ' || p1[2] == '\t'))
5731 while (isalnum (*p1) || *p1 == '_' || *p1 == '$')
5735 if (*p1 && *p1 != ' ' && *p1 != '\t')
5736 error ("Arguments must be catch names.");
5742 struct sal_chain *next = (struct sal_chain *)
5743 alloca (sizeof (struct sal_chain));
5744 next->next = sal_chain;
5745 next->sal = get_catch_sal (p);
5750 printf_unfiltered ("No catch clause for exception %s.\n", p);
5755 while (*p == ' ' || *p == '\t')
5761 /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
5763 static struct symtabs_and_lines
5764 get_catch_sals (int this_level_only)
5766 register struct blockvector *bl;
5767 register struct block *block;
5768 int index, have_default = 0;
5770 struct symtabs_and_lines sals;
5771 struct sal_chain *sal_chain = 0;
5772 char *blocks_searched;
5774 /* Not sure whether an error message is always the correct response,
5775 but it's better than a core dump. */
5776 if (deprecated_selected_frame == NULL)
5777 error ("No selected frame.");
5778 block = get_frame_block (deprecated_selected_frame, 0);
5779 pc = deprecated_selected_frame->pc;
5785 error ("No symbol table info available.\n");
5787 bl = blockvector_for_pc (BLOCK_END (block) - 4, &index);
5788 blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
5789 memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
5793 CORE_ADDR end = BLOCK_END (block) - 4;
5796 if (bl != blockvector_for_pc (end, &index))
5797 error ("blockvector blotch");
5798 if (BLOCKVECTOR_BLOCK (bl, index) != block)
5799 error ("blockvector botch");
5800 last_index = BLOCKVECTOR_NBLOCKS (bl);
5803 /* Don't print out blocks that have gone by. */
5804 while (index < last_index
5805 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc)
5808 while (index < last_index
5809 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end)
5811 if (blocks_searched[index] == 0)
5813 struct block *b = BLOCKVECTOR_BLOCK (bl, index);
5815 register struct symbol *sym;
5817 ALL_BLOCK_SYMBOLS (b, i, sym)
5819 if (STREQ (SYMBOL_NAME (sym), "default"))
5825 if (SYMBOL_CLASS (sym) == LOC_LABEL)
5827 struct sal_chain *next = (struct sal_chain *)
5828 alloca (sizeof (struct sal_chain));
5829 next->next = sal_chain;
5830 next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym),
5835 blocks_searched[index] = 1;
5841 if (sal_chain && this_level_only)
5844 /* After handling the function's top-level block, stop.
5845 Don't continue to its superblock, the block of
5846 per-file symbols. */
5847 if (BLOCK_FUNCTION (block))
5849 block = BLOCK_SUPERBLOCK (block);
5854 struct sal_chain *tmp_chain;
5856 /* Count the number of entries. */
5857 for (index = 0, tmp_chain = sal_chain; tmp_chain;
5858 tmp_chain = tmp_chain->next)
5862 sals.sals = (struct symtab_and_line *)
5863 xmalloc (index * sizeof (struct symtab_and_line));
5864 for (index = 0; sal_chain; sal_chain = sal_chain->next, index++)
5865 sals.sals[index] = sal_chain->sal;
5872 ep_skip_leading_whitespace (char **s)
5874 if ((s == NULL) || (*s == NULL))
5876 while (isspace (**s))
5880 /* This function examines a string, and attempts to find a token
5881 that might be an event name in the leading characters. If a
5882 possible match is found, a pointer to the last character of
5883 the token is returned. Else, NULL is returned. */
5886 ep_find_event_name_end (char *arg)
5889 char *event_name_end = NULL;
5891 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5895 /* We break out of the loop when we find a token delimiter.
5896 Basically, we're looking for alphanumerics and underscores;
5897 anything else delimites the token. */
5900 if (!isalnum (*s) && (*s != '_'))
5906 return event_name_end;
5910 /* This function attempts to parse an optional "if <cond>" clause
5911 from the arg string. If one is not found, it returns NULL.
5913 Else, it returns a pointer to the condition string. (It does not
5914 attempt to evaluate the string against a particular block.) And,
5915 it updates arg to point to the first character following the parsed
5916 if clause in the arg string. */
5919 ep_parse_optional_if_clause (char **arg)
5923 if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2]))
5926 /* Skip the "if" keyword. */
5929 /* Skip any extra leading whitespace, and record the start of the
5930 condition string. */
5931 ep_skip_leading_whitespace (arg);
5934 /* Assume that the condition occupies the remainder of the arg string. */
5935 (*arg) += strlen (cond_string);
5940 /* This function attempts to parse an optional filename from the arg
5941 string. If one is not found, it returns NULL.
5943 Else, it returns a pointer to the parsed filename. (This function
5944 makes no attempt to verify that a file of that name exists, or is
5945 accessible.) And, it updates arg to point to the first character
5946 following the parsed filename in the arg string.
5948 Note that clients needing to preserve the returned filename for
5949 future access should copy it to their own buffers. */
5951 ep_parse_optional_filename (char **arg)
5953 static char filename[1024];
5958 if ((*arg_p == '\0') || isspace (*arg_p))
5976 /* Commands to deal with catching events, such as signals, exceptions,
5977 process start/exit, etc. */
5981 catch_fork, catch_vfork
5985 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
5986 static void catch_fork_command_1 (catch_fork_kind fork_kind,
5987 char *arg, int tempflag, int from_tty);
5990 catch_fork_command_1 (catch_fork_kind fork_kind, char *arg, int tempflag,
5993 char *cond_string = NULL;
5995 ep_skip_leading_whitespace (&arg);
5997 /* The allowed syntax is:
5999 catch [v]fork if <cond>
6001 First, check if there's an if clause. */
6002 cond_string = ep_parse_optional_if_clause (&arg);
6004 if ((*arg != '\0') && !isspace (*arg))
6005 error ("Junk at end of arguments.");
6007 /* If this target supports it, create a fork or vfork catchpoint
6008 and enable reporting of such events. */
6012 create_fork_event_catchpoint (tempflag, cond_string);
6015 create_vfork_event_catchpoint (tempflag, cond_string);
6018 error ("unsupported or unknown fork kind; cannot catch it");
6024 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6026 catch_exec_command_1 (char *arg, int tempflag, int from_tty)
6028 char *cond_string = NULL;
6030 ep_skip_leading_whitespace (&arg);
6032 /* The allowed syntax is:
6034 catch exec if <cond>
6036 First, check if there's an if clause. */
6037 cond_string = ep_parse_optional_if_clause (&arg);
6039 if ((*arg != '\0') && !isspace (*arg))
6040 error ("Junk at end of arguments.");
6042 /* If this target supports it, create an exec catchpoint
6043 and enable reporting of such events. */
6044 create_exec_event_catchpoint (tempflag, cond_string);
6048 #if defined(SOLIB_ADD)
6050 catch_load_command_1 (char *arg, int tempflag, int from_tty)
6052 char *dll_pathname = NULL;
6053 char *cond_string = NULL;
6055 ep_skip_leading_whitespace (&arg);
6057 /* The allowed syntax is:
6059 catch load if <cond>
6060 catch load <filename>
6061 catch load <filename> if <cond>
6063 The user is not allowed to specify the <filename> after an
6066 We'll ignore the pathological case of a file named "if".
6068 First, check if there's an if clause. If so, then there
6069 cannot be a filename. */
6070 cond_string = ep_parse_optional_if_clause (&arg);
6072 /* If there was an if clause, then there cannot be a filename.
6073 Else, there might be a filename and an if clause. */
6074 if (cond_string == NULL)
6076 dll_pathname = ep_parse_optional_filename (&arg);
6077 ep_skip_leading_whitespace (&arg);
6078 cond_string = ep_parse_optional_if_clause (&arg);
6081 if ((*arg != '\0') && !isspace (*arg))
6082 error ("Junk at end of arguments.");
6084 /* Create a load breakpoint that only triggers when a load of
6085 the specified dll (or any dll, if no pathname was specified)
6087 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid), tempflag,
6088 dll_pathname, cond_string);
6092 catch_unload_command_1 (char *arg, int tempflag, int from_tty)
6094 char *dll_pathname = NULL;
6095 char *cond_string = NULL;
6097 ep_skip_leading_whitespace (&arg);
6099 /* The allowed syntax is:
6101 catch unload if <cond>
6102 catch unload <filename>
6103 catch unload <filename> if <cond>
6105 The user is not allowed to specify the <filename> after an
6108 We'll ignore the pathological case of a file named "if".
6110 First, check if there's an if clause. If so, then there
6111 cannot be a filename. */
6112 cond_string = ep_parse_optional_if_clause (&arg);
6114 /* If there was an if clause, then there cannot be a filename.
6115 Else, there might be a filename and an if clause. */
6116 if (cond_string == NULL)
6118 dll_pathname = ep_parse_optional_filename (&arg);
6119 ep_skip_leading_whitespace (&arg);
6120 cond_string = ep_parse_optional_if_clause (&arg);
6123 if ((*arg != '\0') && !isspace (*arg))
6124 error ("Junk at end of arguments.");
6126 /* Create an unload breakpoint that only triggers when an unload of
6127 the specified dll (or any dll, if no pathname was specified)
6129 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid), tempflag,
6130 dll_pathname, cond_string);
6132 #endif /* SOLIB_ADD */
6134 /* Commands to deal with catching exceptions. */
6136 /* Set a breakpoint at the specified callback routine for an
6137 exception event callback */
6140 create_exception_catchpoint (int tempflag, char *cond_string,
6141 enum exception_event_kind ex_event,
6142 struct symtab_and_line *sal)
6144 struct breakpoint *b;
6145 int thread = -1; /* All threads. */
6148 if (!sal) /* no exception support? */
6153 case EX_EVENT_THROW:
6154 bptype = bp_catch_throw;
6156 case EX_EVENT_CATCH:
6157 bptype = bp_catch_catch;
6159 default: /* error condition */
6160 error ("Internal error -- invalid catchpoint kind");
6163 b = set_raw_breakpoint (*sal, bptype);
6164 set_breakpoint_count (breakpoint_count + 1);
6165 b->number = breakpoint_count;
6167 b->cond_string = (cond_string == NULL) ?
6168 NULL : savestring (cond_string, strlen (cond_string));
6170 b->addr_string = NULL;
6171 b->enable_state = bp_enabled;
6172 b->disposition = tempflag ? disp_del : disp_donttouch;
6176 /* Deal with "catch catch" and "catch throw" commands */
6179 catch_exception_command_1 (enum exception_event_kind ex_event, char *arg,
6180 int tempflag, int from_tty)
6182 char *cond_string = NULL;
6183 struct symtab_and_line *sal = NULL;
6185 ep_skip_leading_whitespace (&arg);
6187 cond_string = ep_parse_optional_if_clause (&arg);
6189 if ((*arg != '\0') && !isspace (*arg))
6190 error ("Junk at end of arguments.");
6192 if ((ex_event != EX_EVENT_THROW) &&
6193 (ex_event != EX_EVENT_CATCH))
6194 error ("Unsupported or unknown exception event; cannot catch it");
6196 /* See if we can find a callback routine */
6197 sal = target_enable_exception_callback (ex_event, 1);
6201 /* We have callbacks from the runtime system for exceptions.
6202 Set a breakpoint on the sal found, if no errors */
6203 if (sal != (struct symtab_and_line *) -1)
6204 create_exception_catchpoint (tempflag, cond_string, ex_event, sal);
6206 return; /* something went wrong with setting up callbacks */
6210 /* No callbacks from runtime system for exceptions.
6211 Try GNU C++ exception breakpoints using labels in debug info. */
6212 if (ex_event == EX_EVENT_CATCH)
6214 handle_gnu_4_16_catch_command (arg, tempflag, from_tty);
6216 else if (ex_event == EX_EVENT_THROW)
6218 /* Set a breakpoint on __raise_exception () */
6220 warning ("Unsupported with this platform/compiler combination.");
6221 warning ("Perhaps you can achieve the effect you want by setting");
6222 warning ("a breakpoint on __raise_exception().");
6227 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6228 inside a catch_errors */
6231 cover_target_enable_exception_callback (PTR arg)
6233 args_for_catchpoint_enable *args = arg;
6234 struct symtab_and_line *sal;
6235 sal = target_enable_exception_callback (args->kind, args->enable_p);
6238 else if (sal == (struct symtab_and_line *) -1)
6241 return 1; /*is valid */
6246 /* This is the original v.4.16 and earlier version of the
6247 catch_command_1() function. Now that other flavours of "catch"
6248 have been introduced, and since exception handling can be handled
6249 in other ways (through target ops) also, this is used only for the
6250 GNU C++ exception handling system.
6251 Note: Only the "catch" flavour of GDB 4.16 is handled here. The
6252 "catch NAME" is now no longer allowed in catch_command_1(). Also,
6253 there was no code in GDB 4.16 for "catch throw".
6255 Called from catch_exception_command_1 () */
6259 handle_gnu_4_16_catch_command (char *arg, int tempflag, int from_tty)
6261 /* First, translate ARG into something we can deal with in terms
6264 struct symtabs_and_lines sals;
6265 struct symtab_and_line sal;
6266 register struct expression *cond = 0;
6267 register struct breakpoint *b;
6271 init_sal (&sal); /* initialize to zeroes */
6273 /* If no arg given, or if first arg is 'if ', all active catch clauses
6274 are breakpointed. */
6276 if (!arg || (arg[0] == 'i' && arg[1] == 'f'
6277 && (arg[2] == ' ' || arg[2] == '\t')))
6279 /* Grab all active catch clauses. */
6280 sals = get_catch_sals (0);
6284 /* Grab selected catch clauses. */
6285 error ("catch NAME not implemented");
6288 /* Not sure why this code has been disabled. I'm leaving
6289 it disabled. We can never come here now anyway
6290 since we don't allow the "catch NAME" syntax.
6293 /* This isn't used; I don't know what it was for. */
6294 sals = map_catch_names (arg, catch_breakpoint);
6302 for (i = 0; i < sals.nelts; i++)
6304 resolve_sal_pc (&sals.sals[i]);
6308 if (arg[0] == 'i' && arg[1] == 'f'
6309 && (arg[2] == ' ' || arg[2] == '\t'))
6310 cond = parse_exp_1 ((arg += 2, &arg),
6311 block_for_pc (sals.sals[i].pc), 0);
6313 error ("Junk at end of arguments.");
6318 for (i = 0; i < sals.nelts; i++)
6323 describe_other_breakpoints (sal.pc, sal.section);
6325 /* Important -- this is an ordinary breakpoint. For platforms
6326 with callback support for exceptions,
6327 create_exception_catchpoint() will create special bp types
6328 (bp_catch_catch and bp_catch_throw), and there is code in
6329 insert_breakpoints() and elsewhere that depends on that. */
6330 b = set_raw_breakpoint (sal, bp_breakpoint);
6331 set_breakpoint_count (breakpoint_count + 1);
6332 b->number = breakpoint_count;
6335 b->enable_state = bp_enabled;
6336 b->disposition = tempflag ? disp_del : disp_donttouch;
6343 warning ("Multiple breakpoints were set.");
6344 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
6350 catch_command_1 (char *arg, int tempflag, int from_tty)
6353 /* The first argument may be an event name, such as "start" or "load".
6354 If so, then handle it as such. If it doesn't match an event name,
6355 then attempt to interpret it as an exception name. (This latter is
6356 the v4.16-and-earlier GDB meaning of the "catch" command.)
6358 First, try to find the bounds of what might be an event name. */
6359 char *arg1_start = arg;
6363 if (arg1_start == NULL)
6365 /* Old behaviour was to use pre-v-4.16 syntax */
6366 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6368 /* Now, this is not allowed */
6369 error ("Catch requires an event name.");
6372 arg1_end = ep_find_event_name_end (arg1_start);
6373 if (arg1_end == NULL)
6374 error ("catch requires an event");
6375 arg1_length = arg1_end + 1 - arg1_start;
6377 /* Try to match what we found against known event names. */
6378 if (strncmp (arg1_start, "signal", arg1_length) == 0)
6380 error ("Catch of signal not yet implemented");
6382 else if (strncmp (arg1_start, "catch", arg1_length) == 0)
6384 catch_exception_command_1 (EX_EVENT_CATCH, arg1_end + 1,
6385 tempflag, from_tty);
6387 else if (strncmp (arg1_start, "throw", arg1_length) == 0)
6389 catch_exception_command_1 (EX_EVENT_THROW, arg1_end + 1,
6390 tempflag, from_tty);
6392 else if (strncmp (arg1_start, "thread_start", arg1_length) == 0)
6394 error ("Catch of thread_start not yet implemented");
6396 else if (strncmp (arg1_start, "thread_exit", arg1_length) == 0)
6398 error ("Catch of thread_exit not yet implemented");
6400 else if (strncmp (arg1_start, "thread_join", arg1_length) == 0)
6402 error ("Catch of thread_join not yet implemented");
6404 else if (strncmp (arg1_start, "start", arg1_length) == 0)
6406 error ("Catch of start not yet implemented");
6408 else if (strncmp (arg1_start, "exit", arg1_length) == 0)
6410 error ("Catch of exit not yet implemented");
6412 else if (strncmp (arg1_start, "fork", arg1_length) == 0)
6414 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6415 catch_fork_command_1 (catch_fork, arg1_end + 1, tempflag, from_tty);
6417 error ("Catch of fork not yet implemented");
6420 else if (strncmp (arg1_start, "vfork", arg1_length) == 0)
6422 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6423 catch_fork_command_1 (catch_vfork, arg1_end + 1, tempflag, from_tty);
6425 error ("Catch of vfork not yet implemented");
6428 else if (strncmp (arg1_start, "exec", arg1_length) == 0)
6430 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6431 catch_exec_command_1 (arg1_end + 1, tempflag, from_tty);
6433 error ("Catch of exec not yet implemented");
6436 else if (strncmp (arg1_start, "load", arg1_length) == 0)
6438 #if defined(SOLIB_ADD)
6439 catch_load_command_1 (arg1_end + 1, tempflag, from_tty);
6441 error ("Catch of load not implemented");
6444 else if (strncmp (arg1_start, "unload", arg1_length) == 0)
6446 #if defined(SOLIB_ADD)
6447 catch_unload_command_1 (arg1_end + 1, tempflag, from_tty);
6449 error ("Catch of load not implemented");
6452 else if (strncmp (arg1_start, "stop", arg1_length) == 0)
6454 error ("Catch of stop not yet implemented");
6457 /* This doesn't appear to be an event name */
6461 /* Pre-v.4.16 behaviour was to treat the argument
6462 as the name of an exception */
6463 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6464 /* Now this is not allowed */
6465 error ("Unknown event kind specified for catch");
6470 /* Used by the gui, could be made a worker for other things. */
6473 set_breakpoint_sal (struct symtab_and_line sal)
6475 struct breakpoint *b;
6476 b = set_raw_breakpoint (sal, bp_breakpoint);
6477 set_breakpoint_count (breakpoint_count + 1);
6478 b->number = breakpoint_count;
6485 /* These aren't used; I don't know what they were for. */
6486 /* Disable breakpoints on all catch clauses described in ARGS. */
6488 disable_catch (char *args)
6490 /* Map the disable command to catch clauses described in ARGS. */
6493 /* Enable breakpoints on all catch clauses described in ARGS. */
6495 enable_catch (char *args)
6497 /* Map the disable command to catch clauses described in ARGS. */
6500 /* Delete breakpoints on all catch clauses in the active scope. */
6502 delete_catch (char *args)
6504 /* Map the delete command to catch clauses described in ARGS. */
6509 catch_command (char *arg, int from_tty)
6511 catch_command_1 (arg, 0, from_tty);
6516 tcatch_command (char *arg, int from_tty)
6518 catch_command_1 (arg, 1, from_tty);
6521 /* Delete breakpoints by address or line. */
6524 clear_command (char *arg, int from_tty)
6526 struct breakpoint *b, *tmp, *prev, *found;
6528 struct symtabs_and_lines sals;
6529 struct symtab_and_line sal;
6534 sals = decode_line_spec (arg, 1);
6539 sals.sals = (struct symtab_and_line *)
6540 xmalloc (sizeof (struct symtab_and_line));
6541 make_cleanup (xfree, sals.sals);
6542 init_sal (&sal); /* initialize to zeroes */
6543 sal.line = default_breakpoint_line;
6544 sal.symtab = default_breakpoint_symtab;
6545 sal.pc = default_breakpoint_address;
6546 if (sal.symtab == 0)
6547 error ("No source file specified.");
6555 /* For each line spec given, delete bps which correspond
6556 to it. Do it in two passes, solely to preserve the current
6557 behavior that from_tty is forced true if we delete more than
6561 for (i = 0; i < sals.nelts; i++)
6563 /* If exact pc given, clear bpts at that pc.
6564 If line given (pc == 0), clear all bpts on specified line.
6565 If defaulting, clear all bpts on default line
6568 defaulting sal.pc != 0 tests to do
6573 1 0 <can't happen> */
6578 /* Find all matching breakpoints, remove them from the
6579 breakpoint chain, and add them to the 'found' chain. */
6580 ALL_BREAKPOINTS_SAFE (b, tmp)
6582 /* Are we going to delete b? */
6583 if (b->type != bp_none
6584 && b->type != bp_watchpoint
6585 && b->type != bp_hardware_watchpoint
6586 && b->type != bp_read_watchpoint
6587 && b->type != bp_access_watchpoint
6588 /* Not if b is a watchpoint of any sort... */
6589 && (((sal.pc && (b->address == sal.pc))
6590 && (!section_is_overlay (b->section)
6591 || b->section == sal.section))
6592 /* Yes, if sal.pc matches b (modulo overlays). */
6593 || ((default_match || (0 == sal.pc))
6594 && b->source_file != NULL
6595 && sal.symtab != NULL
6596 && STREQ (b->source_file, sal.symtab->filename)
6597 && b->line_number == sal.line)))
6598 /* Yes, if sal source file and line matches b. */
6600 /* Remove it from breakpoint_chain... */
6601 if (b == breakpoint_chain)
6603 /* b is at the head of the list */
6604 breakpoint_chain = b->next;
6608 prev->next = b->next;
6610 /* And add it to 'found' chain. */
6616 /* Keep b, and keep a pointer to it. */
6621 /* Now go thru the 'found' chain and delete them. */
6625 error ("No breakpoint at %s.", arg);
6627 error ("No breakpoint at this line.");
6631 from_tty = 1; /* Always report if deleted more than one */
6633 printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : "");
6634 breakpoints_changed ();
6638 printf_unfiltered ("%d ", found->number);
6640 delete_breakpoint (found);
6644 putchar_unfiltered ('\n');
6647 /* Delete breakpoint in BS if they are `delete' breakpoints and
6648 all breakpoints that are marked for deletion, whether hit or not.
6649 This is called after any breakpoint is hit, or after errors. */
6652 breakpoint_auto_delete (bpstat bs)
6654 struct breakpoint *b, *temp;
6656 for (; bs; bs = bs->next)
6657 if (bs->breakpoint_at && bs->breakpoint_at->disposition == disp_del
6659 delete_breakpoint (bs->breakpoint_at);
6661 ALL_BREAKPOINTS_SAFE (b, temp)
6663 if (b->disposition == disp_del_at_next_stop)
6664 delete_breakpoint (b);
6668 /* Delete a breakpoint and clean up all traces of it in the data
6672 delete_breakpoint (struct breakpoint *bpt)
6674 register struct breakpoint *b;
6678 error ("Internal error (attempted to delete a NULL breakpoint)");
6681 /* Has this bp already been deleted? This can happen because multiple
6682 lists can hold pointers to bp's. bpstat lists are especial culprits.
6684 One example of this happening is a watchpoint's scope bp. When the
6685 scope bp triggers, we notice that the watchpoint is out of scope, and
6686 delete it. We also delete its scope bp. But the scope bp is marked
6687 "auto-deleting", and is already on a bpstat. That bpstat is then
6688 checked for auto-deleting bp's, which are deleted.
6690 A real solution to this problem might involve reference counts in bp's,
6691 and/or giving them pointers back to their referencing bpstat's, and
6692 teaching delete_breakpoint to only free a bp's storage when no more
6693 references were extent. A cheaper bandaid was chosen. */
6694 if (bpt->type == bp_none)
6697 if (delete_breakpoint_hook)
6698 delete_breakpoint_hook (bpt);
6699 breakpoint_delete_event (bpt->number);
6702 remove_breakpoint (bpt, mark_inserted);
6704 if (breakpoint_chain == bpt)
6705 breakpoint_chain = bpt->next;
6707 /* If we have callback-style exception catchpoints, don't go through
6708 the adjustments to the C++ runtime library etc. if the inferior
6709 isn't actually running. target_enable_exception_callback for a
6710 null target ops vector gives an undesirable error message, so we
6711 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6712 exceptions are supported in this way, it's OK for now. FIXME */
6713 if (ep_is_exception_catchpoint (bpt) && target_has_execution)
6715 static char message1[] = "Error in deleting catchpoint %d:\n";
6716 static char message[sizeof (message1) + 30];
6717 args_for_catchpoint_enable args;
6719 /* Format possible error msg */
6720 sprintf (message, message1, bpt->number);
6721 args.kind = bpt->type == bp_catch_catch ?
6722 EX_EVENT_CATCH : EX_EVENT_THROW;
6724 catch_errors (cover_target_enable_exception_callback, &args,
6725 message, RETURN_MASK_ALL);
6732 b->next = bpt->next;
6736 check_duplicates (bpt);
6737 /* If this breakpoint was inserted, and there is another breakpoint
6738 at the same address, we need to insert the other breakpoint. */
6740 && bpt->type != bp_hardware_watchpoint
6741 && bpt->type != bp_read_watchpoint
6742 && bpt->type != bp_access_watchpoint
6743 && bpt->type != bp_catch_fork
6744 && bpt->type != bp_catch_vfork
6745 && bpt->type != bp_catch_exec)
6748 if (b->address == bpt->address
6749 && b->section == bpt->section
6751 && b->enable_state != bp_disabled
6752 && b->enable_state != bp_shlib_disabled
6753 && b->enable_state != bp_call_disabled)
6757 /* We should never reach this point if there is a permanent
6758 breakpoint at the same address as the one being deleted.
6759 If there is a permanent breakpoint somewhere, it should
6760 always be the only one inserted. */
6761 if (b->enable_state == bp_permanent)
6762 internal_error (__FILE__, __LINE__,
6763 "another breakpoint was inserted on top of "
6764 "a permanent breakpoint");
6766 if (b->type == bp_hardware_breakpoint)
6767 val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
6769 val = target_insert_breakpoint (b->address, b->shadow_contents);
6771 /* If there was an error in the insert, print a message, then stop execution. */
6774 struct ui_file *tmp_error_stream = mem_fileopen ();
6775 make_cleanup_ui_file_delete (tmp_error_stream);
6778 if (b->type == bp_hardware_breakpoint)
6780 fprintf_unfiltered (tmp_error_stream,
6781 "Cannot insert hardware breakpoint %d.\n"
6782 "You may have requested too many hardware breakpoints.\n",
6787 fprintf_unfiltered (tmp_error_stream, "Cannot insert breakpoint %d.\n", b->number);
6788 fprintf_filtered (tmp_error_stream, "Error accessing memory address ");
6789 print_address_numeric (b->address, 1, tmp_error_stream);
6790 fprintf_filtered (tmp_error_stream, ": %s.\n",
6791 safe_strerror (val));
6794 fprintf_unfiltered (tmp_error_stream,"The same program may be running in another process.");
6795 target_terminal_ours_for_output ();
6796 error_stream(tmp_error_stream);
6803 free_command_lines (&bpt->commands);
6806 if (bpt->cond_string != NULL)
6807 xfree (bpt->cond_string);
6808 if (bpt->addr_string != NULL)
6809 xfree (bpt->addr_string);
6810 if (bpt->exp != NULL)
6812 if (bpt->exp_string != NULL)
6813 xfree (bpt->exp_string);
6814 if (bpt->val != NULL)
6815 value_free (bpt->val);
6816 if (bpt->source_file != NULL)
6817 xfree (bpt->source_file);
6818 if (bpt->dll_pathname != NULL)
6819 xfree (bpt->dll_pathname);
6820 if (bpt->triggered_dll_pathname != NULL)
6821 xfree (bpt->triggered_dll_pathname);
6822 if (bpt->exec_pathname != NULL)
6823 xfree (bpt->exec_pathname);
6825 /* Be sure no bpstat's are pointing at it after it's been freed. */
6826 /* FIXME, how can we find all bpstat's?
6827 We just check stop_bpstat for now. */
6828 for (bs = stop_bpstat; bs; bs = bs->next)
6829 if (bs->breakpoint_at == bpt)
6831 bs->breakpoint_at = NULL;
6833 /* bs->commands will be freed later. */
6835 /* On the chance that someone will soon try again to delete this same
6836 bp, we mark it as deleted before freeing its storage. */
6837 bpt->type = bp_none;
6843 do_delete_breakpoint_cleanup (void *b)
6845 delete_breakpoint (b);
6849 make_cleanup_delete_breakpoint (struct breakpoint *b)
6851 return make_cleanup (do_delete_breakpoint_cleanup, b);
6855 make_exec_cleanup_delete_breakpoint (struct breakpoint *b)
6857 return make_exec_cleanup (do_delete_breakpoint_cleanup, b);
6861 delete_command (char *arg, int from_tty)
6863 struct breakpoint *b, *temp;
6869 int breaks_to_delete = 0;
6871 /* Delete all breakpoints if no argument.
6872 Do not delete internal or call-dummy breakpoints, these
6873 have to be deleted with an explicit breakpoint number argument. */
6876 if (b->type != bp_call_dummy &&
6877 b->type != bp_shlib_event &&
6878 b->type != bp_thread_event &&
6879 b->type != bp_overlay_event &&
6881 breaks_to_delete = 1;
6884 /* Ask user only if there are some breakpoints to delete. */
6886 || (breaks_to_delete && query ("Delete all breakpoints? ")))
6888 ALL_BREAKPOINTS_SAFE (b, temp)
6890 if (b->type != bp_call_dummy &&
6891 b->type != bp_shlib_event &&
6892 b->type != bp_thread_event &&
6893 b->type != bp_overlay_event &&
6895 delete_breakpoint (b);
6900 map_breakpoint_numbers (arg, delete_breakpoint);
6903 /* Reset a breakpoint given it's struct breakpoint * BINT.
6904 The value we return ends up being the return value from catch_errors.
6905 Unused in this case. */
6908 breakpoint_re_set_one (PTR bint)
6910 /* get past catch_errs */
6911 struct breakpoint *b = (struct breakpoint *) bint;
6914 struct symtabs_and_lines sals;
6916 enum enable_state save_enable;
6921 warning ("attempted to reset apparently deleted breakpoint #%d?",
6925 case bp_hardware_breakpoint:
6927 case bp_catch_unload:
6928 if (b->addr_string == NULL)
6930 /* Anything without a string can't be re-set. */
6931 delete_breakpoint (b);
6934 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6936 ``And a hack it is, although Apple's Darwin version of GDB
6937 contains an almost identical hack to implement a "future
6938 break" command. It seems to work in many real world cases,
6939 but it is easy to come up with a test case where the patch
6940 doesn't help at all.''
6942 ``It seems that the way GDB implements breakpoints - in -
6943 shared - libraries was designed for a.out shared library
6944 systems (SunOS 4) where shared libraries were loaded at a
6945 fixed address in memory. Since ELF shared libraries can (and
6946 will) be loaded at any address in memory, things break.
6947 Fixing this is not trivial. Therefore, I'm not sure whether
6948 we should add this hack to the branch only. I cannot
6949 guarantee that things will be fixed on the trunk in the near
6952 In case we have a problem, disable this breakpoint. We'll
6953 restore its status if we succeed. Don't disable a
6954 shlib_disabled breakpoint though. There's a fair chance we
6955 can't re-set it if the shared library it's in hasn't been
6957 save_enable = b->enable_state;
6958 if (b->enable_state != bp_shlib_disabled)
6959 b->enable_state = bp_disabled;
6961 set_language (b->language);
6962 input_radix = b->input_radix;
6964 sals = decode_line_1 (&s, 1, (struct symtab *) NULL, 0, (char ***) NULL);
6965 for (i = 0; i < sals.nelts; i++)
6967 resolve_sal_pc (&sals.sals[i]);
6969 /* Reparse conditions, they might contain references to the
6971 if (b->cond_string != NULL)
6976 b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0);
6979 /* We need to re-set the breakpoint if the address changes... */
6980 if (b->address != sals.sals[i].pc
6981 /* ...or new and old breakpoints both have source files, and
6982 the source file name or the line number changes... */
6983 || (b->source_file != NULL
6984 && sals.sals[i].symtab != NULL
6985 && (!STREQ (b->source_file, sals.sals[i].symtab->filename)
6986 || b->line_number != sals.sals[i].line)
6988 /* ...or we switch between having a source file and not having
6990 || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL))
6993 if (b->source_file != NULL)
6994 xfree (b->source_file);
6995 if (sals.sals[i].symtab == NULL)
6996 b->source_file = NULL;
6999 savestring (sals.sals[i].symtab->filename,
7000 strlen (sals.sals[i].symtab->filename));
7001 b->line_number = sals.sals[i].line;
7002 b->address = sals.sals[i].pc;
7004 /* Used to check for duplicates here, but that can
7005 cause trouble, as it doesn't check for disabled
7010 /* Might be better to do this just once per breakpoint_re_set,
7011 rather than once for every breakpoint. */
7012 breakpoints_changed ();
7014 b->section = sals.sals[i].section;
7015 b->enable_state = save_enable; /* Restore it, this worked. */
7018 /* Now that this is re-enabled, check_duplicates
7020 check_duplicates (b);
7027 case bp_hardware_watchpoint:
7028 case bp_read_watchpoint:
7029 case bp_access_watchpoint:
7030 innermost_block = NULL;
7031 /* The issue arises of what context to evaluate this in. The
7032 same one as when it was set, but what does that mean when
7033 symbols have been re-read? We could save the filename and
7034 functionname, but if the context is more local than that, the
7035 best we could do would be something like how many levels deep
7036 and which index at that particular level, but that's going to
7037 be less stable than filenames or function names. */
7039 /* So for now, just use a global context. */
7042 b->exp = parse_expression (b->exp_string);
7043 b->exp_valid_block = innermost_block;
7044 mark = value_mark ();
7046 value_free (b->val);
7047 b->val = evaluate_expression (b->exp);
7048 release_value (b->val);
7049 if (VALUE_LAZY (b->val))
7050 value_fetch_lazy (b->val);
7052 if (b->cond_string != NULL)
7057 b->cond = parse_exp_1 (&s, (struct block *) 0, 0);
7059 if (b->enable_state == bp_enabled)
7061 value_free_to_mark (mark);
7063 case bp_catch_catch:
7064 case bp_catch_throw:
7066 /* We needn't really do anything to reset these, since the mask
7067 that requests them is unaffected by e.g., new libraries being
7070 case bp_catch_vfork:
7075 printf_filtered ("Deleting unknown breakpoint type %d\n", b->type);
7077 /* Delete longjmp and overlay event breakpoints; they will be
7078 reset later by breakpoint_re_set. */
7080 case bp_longjmp_resume:
7081 case bp_overlay_event:
7082 delete_breakpoint (b);
7085 /* This breakpoint is special, it's set up when the inferior
7086 starts and we really don't want to touch it. */
7087 case bp_shlib_event:
7089 /* Like bp_shlib_event, this breakpoint type is special.
7090 Once it is set up, we do not want to touch it. */
7091 case bp_thread_event:
7093 /* Keep temporary breakpoints, which can be encountered when we step
7094 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7095 Otherwise these should have been blown away via the cleanup chain
7096 or by breakpoint_init_inferior when we rerun the executable. */
7099 case bp_watchpoint_scope:
7101 case bp_step_resume:
7108 /* Re-set all breakpoints after symbols have been re-loaded. */
7110 breakpoint_re_set (void)
7112 struct breakpoint *b, *temp;
7113 enum language save_language;
7114 int save_input_radix;
7115 static char message1[] = "Error in re-setting breakpoint %d:\n";
7116 char message[sizeof (message1) + 30 /* slop */ ];
7118 save_language = current_language->la_language;
7119 save_input_radix = input_radix;
7120 ALL_BREAKPOINTS_SAFE (b, temp)
7122 /* Format possible error msg */
7123 sprintf (message, message1, b->number);
7124 catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL);
7126 set_language (save_language);
7127 input_radix = save_input_radix;
7129 if (GET_LONGJMP_TARGET_P ())
7131 create_longjmp_breakpoint ("longjmp");
7132 create_longjmp_breakpoint ("_longjmp");
7133 create_longjmp_breakpoint ("siglongjmp");
7134 create_longjmp_breakpoint ("_siglongjmp");
7135 create_longjmp_breakpoint (NULL);
7138 create_overlay_event_breakpoint ("_ovly_debug_event");
7141 /* Reset the thread number of this breakpoint:
7143 - If the breakpoint is for all threads, leave it as-is.
7144 - Else, reset it to the current thread for inferior_ptid. */
7146 breakpoint_re_set_thread (struct breakpoint *b)
7148 if (b->thread != -1)
7150 if (in_thread_list (inferior_ptid))
7151 b->thread = pid_to_thread_id (inferior_ptid);
7155 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7156 If from_tty is nonzero, it prints a message to that effect,
7157 which ends with a period (no newline). */
7160 set_ignore_count (int bptnum, int count, int from_tty)
7162 register struct breakpoint *b;
7168 if (b->number == bptnum)
7170 b->ignore_count = count;
7174 printf_filtered ("Will stop next time breakpoint %d is reached.",
7176 else if (count == 1)
7177 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7180 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7183 breakpoints_changed ();
7184 breakpoint_modify_event (b->number);
7188 error ("No breakpoint number %d.", bptnum);
7191 /* Clear the ignore counts of all breakpoints. */
7193 breakpoint_clear_ignore_counts (void)
7195 struct breakpoint *b;
7198 b->ignore_count = 0;
7201 /* Command to set ignore-count of breakpoint N to COUNT. */
7204 ignore_command (char *args, int from_tty)
7210 error_no_arg ("a breakpoint number");
7212 num = get_number (&p);
7214 error ("bad breakpoint number: '%s'", args);
7216 error ("Second argument (specified ignore-count) is missing.");
7218 set_ignore_count (num,
7219 longest_to_int (value_as_long (parse_and_eval (p))),
7222 printf_filtered ("\n");
7225 /* Call FUNCTION on each of the breakpoints
7226 whose numbers are given in ARGS. */
7229 map_breakpoint_numbers (char *args, void (*function) (struct breakpoint *))
7231 register char *p = args;
7234 register struct breakpoint *b, *tmp;
7238 error_no_arg ("one or more breakpoint numbers");
7245 num = get_number_or_range (&p1);
7248 warning ("bad breakpoint number at or near '%s'", p);
7252 ALL_BREAKPOINTS_SAFE (b, tmp)
7253 if (b->number == num)
7255 struct breakpoint *related_breakpoint = b->related_breakpoint;
7258 if (related_breakpoint)
7259 function (related_breakpoint);
7263 printf_unfiltered ("No breakpoint number %d.\n", num);
7269 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7270 If from_tty is nonzero, it prints a message to that effect,
7271 which ends with a period (no newline). */
7274 disable_breakpoint (struct breakpoint *bpt)
7276 /* Never disable a watchpoint scope breakpoint; we want to
7277 hit them when we leave scope so we can delete both the
7278 watchpoint and its scope breakpoint at that time. */
7279 if (bpt->type == bp_watchpoint_scope)
7282 /* You can't disable permanent breakpoints. */
7283 if (bpt->enable_state == bp_permanent)
7286 bpt->enable_state = bp_disabled;
7288 check_duplicates (bpt);
7290 if (modify_breakpoint_hook)
7291 modify_breakpoint_hook (bpt);
7292 breakpoint_modify_event (bpt->number);
7297 disable_command (char *args, int from_tty)
7299 register struct breakpoint *bpt;
7301 ALL_BREAKPOINTS (bpt)
7305 warning ("attempted to disable apparently deleted breakpoint #%d?",
7310 case bp_catch_unload:
7312 case bp_catch_vfork:
7314 case bp_catch_catch:
7315 case bp_catch_throw:
7316 case bp_hardware_breakpoint:
7318 case bp_hardware_watchpoint:
7319 case bp_read_watchpoint:
7320 case bp_access_watchpoint:
7321 disable_breakpoint (bpt);
7326 map_breakpoint_numbers (args, disable_breakpoint);
7330 do_enable_breakpoint (struct breakpoint *bpt, enum bpdisp disposition)
7332 struct frame_info *save_selected_frame = NULL;
7333 int save_selected_frame_level = -1;
7334 int target_resources_ok, other_type_used;
7337 if (bpt->type == bp_hardware_breakpoint)
7340 i = hw_breakpoint_used_count ();
7341 target_resources_ok =
7342 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,
7344 if (target_resources_ok == 0)
7345 error ("No hardware breakpoint support in the target.");
7346 else if (target_resources_ok < 0)
7347 error ("Hardware breakpoints used exceeds limit.");
7350 if (bpt->enable_state != bp_permanent)
7351 bpt->enable_state = bp_enabled;
7352 bpt->disposition = disposition;
7353 check_duplicates (bpt);
7354 breakpoints_changed ();
7356 if (bpt->type == bp_watchpoint ||
7357 bpt->type == bp_hardware_watchpoint ||
7358 bpt->type == bp_read_watchpoint ||
7359 bpt->type == bp_access_watchpoint)
7361 if (bpt->exp_valid_block != NULL)
7363 struct frame_info *fr =
7364 fr = frame_find_by_id (bpt->watchpoint_frame);
7368 Cannot enable watchpoint %d because the block in which its expression\n\
7369 is valid is not currently in scope.\n", bpt->number);
7370 bpt->enable_state = bp_disabled;
7374 save_selected_frame = deprecated_selected_frame;
7375 save_selected_frame_level = frame_relative_level (deprecated_selected_frame);
7379 value_free (bpt->val);
7380 mark = value_mark ();
7381 bpt->val = evaluate_expression (bpt->exp);
7382 release_value (bpt->val);
7383 if (VALUE_LAZY (bpt->val))
7384 value_fetch_lazy (bpt->val);
7386 if (bpt->type == bp_hardware_watchpoint ||
7387 bpt->type == bp_read_watchpoint ||
7388 bpt->type == bp_access_watchpoint)
7390 int i = hw_watchpoint_used_count (bpt->type, &other_type_used);
7391 int mem_cnt = can_use_hardware_watchpoint (bpt->val);
7393 /* Hack around 'unused var' error for some targets here */
7395 target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7396 bpt->type, i + mem_cnt, other_type_used);
7397 /* we can consider of type is bp_hardware_watchpoint, convert to
7398 bp_watchpoint in the following condition */
7399 if (target_resources_ok < 0)
7402 Cannot enable watchpoint %d because target watch resources\n\
7403 have been allocated for other watchpoints.\n", bpt->number);
7404 bpt->enable_state = bp_disabled;
7405 value_free_to_mark (mark);
7410 if (save_selected_frame_level >= 0)
7411 select_frame (save_selected_frame);
7412 value_free_to_mark (mark);
7414 if (modify_breakpoint_hook)
7415 modify_breakpoint_hook (bpt);
7416 breakpoint_modify_event (bpt->number);
7420 enable_breakpoint (struct breakpoint *bpt)
7422 do_enable_breakpoint (bpt, bpt->disposition);
7425 /* The enable command enables the specified breakpoints (or all defined
7426 breakpoints) so they once again become (or continue to be) effective
7427 in stopping the inferior. */
7431 enable_command (char *args, int from_tty)
7433 register struct breakpoint *bpt;
7435 ALL_BREAKPOINTS (bpt)
7439 warning ("attempted to enable apparently deleted breakpoint #%d?",
7444 case bp_catch_unload:
7446 case bp_catch_vfork:
7448 case bp_catch_catch:
7449 case bp_catch_throw:
7450 case bp_hardware_breakpoint:
7452 case bp_hardware_watchpoint:
7453 case bp_read_watchpoint:
7454 case bp_access_watchpoint:
7455 enable_breakpoint (bpt);
7460 map_breakpoint_numbers (args, enable_breakpoint);
7464 enable_once_breakpoint (struct breakpoint *bpt)
7466 do_enable_breakpoint (bpt, disp_disable);
7471 enable_once_command (char *args, int from_tty)
7473 map_breakpoint_numbers (args, enable_once_breakpoint);
7477 enable_delete_breakpoint (struct breakpoint *bpt)
7479 do_enable_breakpoint (bpt, disp_del);
7484 enable_delete_command (char *args, int from_tty)
7486 map_breakpoint_numbers (args, enable_delete_breakpoint);
7489 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7491 struct symtabs_and_lines
7492 decode_line_spec_1 (char *string, int funfirstline)
7494 struct symtabs_and_lines sals;
7496 error ("Empty line specification.");
7497 if (default_breakpoint_valid)
7498 sals = decode_line_1 (&string, funfirstline,
7499 default_breakpoint_symtab,
7500 default_breakpoint_line,
7503 sals = decode_line_1 (&string, funfirstline,
7504 (struct symtab *) NULL, 0, (char ***) NULL);
7506 error ("Junk at end of line specification: %s", string);
7511 _initialize_breakpoint (void)
7513 struct cmd_list_element *c;
7515 breakpoint_chain = 0;
7516 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7517 before a breakpoint is set. */
7518 breakpoint_count = 0;
7520 add_com ("ignore", class_breakpoint, ignore_command,
7521 "Set ignore-count of breakpoint number N to COUNT.\n\
7522 Usage is `ignore N COUNT'.");
7524 add_com_alias ("bc", "ignore", class_breakpoint, 1);
7526 add_com ("commands", class_breakpoint, commands_command,
7527 "Set commands to be executed when a breakpoint is hit.\n\
7528 Give breakpoint number as argument after \"commands\".\n\
7529 With no argument, the targeted breakpoint is the last one set.\n\
7530 The commands themselves follow starting on the next line.\n\
7531 Type a line containing \"end\" to indicate the end of them.\n\
7532 Give \"silent\" as the first line to make the breakpoint silent;\n\
7533 then no output is printed when it is hit, except what the commands print.");
7535 add_com ("condition", class_breakpoint, condition_command,
7536 "Specify breakpoint number N to break only if COND is true.\n\
7537 Usage is `condition N COND', where N is an integer and COND is an\n\
7538 expression to be evaluated whenever breakpoint N is reached.");
7540 c = add_com ("tbreak", class_breakpoint, tbreak_command,
7541 "Set a temporary breakpoint. Args like \"break\" command.\n\
7542 Like \"break\" except the breakpoint is only temporary,\n\
7543 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7544 by using \"enable delete\" on the breakpoint number.");
7545 set_cmd_completer (c, location_completer);
7547 c = add_com ("hbreak", class_breakpoint, hbreak_command,
7548 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7549 Like \"break\" except the breakpoint requires hardware support,\n\
7550 some target hardware may not have this support.");
7551 set_cmd_completer (c, location_completer);
7553 c = add_com ("thbreak", class_breakpoint, thbreak_command,
7554 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7555 Like \"hbreak\" except the breakpoint is only temporary,\n\
7556 so it will be deleted when hit.");
7557 set_cmd_completer (c, location_completer);
7559 add_prefix_cmd ("enable", class_breakpoint, enable_command,
7560 "Enable some breakpoints.\n\
7561 Give breakpoint numbers (separated by spaces) as arguments.\n\
7562 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7563 This is used to cancel the effect of the \"disable\" command.\n\
7564 With a subcommand you can enable temporarily.",
7565 &enablelist, "enable ", 1, &cmdlist);
7567 add_com ("ab", class_breakpoint, enable_command,
7568 "Enable some breakpoints.\n\
7569 Give breakpoint numbers (separated by spaces) as arguments.\n\
7570 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7571 This is used to cancel the effect of the \"disable\" command.\n\
7572 With a subcommand you can enable temporarily.");
7574 add_com_alias ("en", "enable", class_breakpoint, 1);
7576 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command,
7577 "Enable some breakpoints.\n\
7578 Give breakpoint numbers (separated by spaces) as arguments.\n\
7579 This is used to cancel the effect of the \"disable\" command.\n\
7580 May be abbreviated to simply \"enable\".\n",
7581 &enablebreaklist, "enable breakpoints ", 1, &enablelist);
7583 add_cmd ("once", no_class, enable_once_command,
7584 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7585 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7588 add_cmd ("delete", no_class, enable_delete_command,
7589 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7590 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7593 add_cmd ("delete", no_class, enable_delete_command,
7594 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7595 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7598 add_cmd ("once", no_class, enable_once_command,
7599 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7600 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7603 add_prefix_cmd ("disable", class_breakpoint, disable_command,
7604 "Disable some breakpoints.\n\
7605 Arguments are breakpoint numbers with spaces in between.\n\
7606 To disable all breakpoints, give no argument.\n\
7607 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7608 &disablelist, "disable ", 1, &cmdlist);
7609 add_com_alias ("dis", "disable", class_breakpoint, 1);
7610 add_com_alias ("disa", "disable", class_breakpoint, 1);
7612 add_com ("sb", class_breakpoint, disable_command,
7613 "Disable some breakpoints.\n\
7614 Arguments are breakpoint numbers with spaces in between.\n\
7615 To disable all breakpoints, give no argument.\n\
7616 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7618 add_cmd ("breakpoints", class_alias, disable_command,
7619 "Disable some breakpoints.\n\
7620 Arguments are breakpoint numbers with spaces in between.\n\
7621 To disable all breakpoints, give no argument.\n\
7622 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7623 This command may be abbreviated \"disable\".",
7626 add_prefix_cmd ("delete", class_breakpoint, delete_command,
7627 "Delete some breakpoints or auto-display expressions.\n\
7628 Arguments are breakpoint numbers with spaces in between.\n\
7629 To delete all breakpoints, give no argument.\n\
7631 Also a prefix command for deletion of other GDB objects.\n\
7632 The \"unset\" command is also an alias for \"delete\".",
7633 &deletelist, "delete ", 1, &cmdlist);
7634 add_com_alias ("d", "delete", class_breakpoint, 1);
7636 add_com ("db", class_breakpoint, delete_command,
7637 "Delete some breakpoints.\n\
7638 Arguments are breakpoint numbers with spaces in between.\n\
7639 To delete all breakpoints, give no argument.\n");
7641 add_cmd ("breakpoints", class_alias, delete_command,
7642 "Delete some breakpoints or auto-display expressions.\n\
7643 Arguments are breakpoint numbers with spaces in between.\n\
7644 To delete all breakpoints, give no argument.\n\
7645 This command may be abbreviated \"delete\".",
7648 add_com ("clear", class_breakpoint, clear_command,
7649 concat ("Clear breakpoint at specified line or function.\n\
7650 Argument may be line number, function name, or \"*\" and an address.\n\
7651 If line number is specified, all breakpoints in that line are cleared.\n\
7652 If function is specified, breakpoints at beginning of function are cleared.\n\
7653 If an address is specified, breakpoints at that address are cleared.\n\n",
7654 "With no argument, clears all breakpoints in the line that the selected frame\n\
7657 See also the \"delete\" command which clears breakpoints by number.", NULL));
7659 c = add_com ("break", class_breakpoint, break_command,
7660 concat ("Set breakpoint at specified line or function.\n\
7661 Argument may be line number, function name, or \"*\" and an address.\n\
7662 If line number is specified, break at start of code for that line.\n\
7663 If function is specified, break at start of code for that function.\n\
7664 If an address is specified, break at that exact address.\n",
7665 "With no arg, uses current execution address of selected stack frame.\n\
7666 This is useful for breaking on return to a stack frame.\n\
7668 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7670 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL));
7671 set_cmd_completer (c, location_completer);
7673 add_com_alias ("b", "break", class_run, 1);
7674 add_com_alias ("br", "break", class_run, 1);
7675 add_com_alias ("bre", "break", class_run, 1);
7676 add_com_alias ("brea", "break", class_run, 1);
7680 add_com_alias ("ba", "break", class_breakpoint, 1);
7681 add_com_alias ("bu", "ubreak", class_breakpoint, 1);
7686 add_abbrev_prefix_cmd ("stop", class_breakpoint, stop_command,
7687 "Break in function/address or break at a line in the current file.",
7688 &stoplist, "stop ", 1, &cmdlist);
7689 add_cmd ("in", class_breakpoint, stopin_command,
7690 "Break in function or address.\n", &stoplist);
7691 add_cmd ("at", class_breakpoint, stopat_command,
7692 "Break at a line in the current file.\n", &stoplist);
7693 add_com ("status", class_info, breakpoints_info,
7694 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7695 The \"Type\" column indicates one of:\n\
7696 \tbreakpoint - normal breakpoint\n\
7697 \twatchpoint - watchpoint\n\
7698 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7699 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7700 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7701 address and file/line number respectively.\n\n",
7702 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7703 are set to the address of the last breakpoint listed.\n\n\
7704 Convenience variable \"$bpnum\" contains the number of the last\n\
7705 breakpoint set.", NULL));
7708 add_info ("breakpoints", breakpoints_info,
7709 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7710 The \"Type\" column indicates one of:\n\
7711 \tbreakpoint - normal breakpoint\n\
7712 \twatchpoint - watchpoint\n\
7713 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7714 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7715 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7716 address and file/line number respectively.\n\n",
7717 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7718 are set to the address of the last breakpoint listed.\n\n\
7719 Convenience variable \"$bpnum\" contains the number of the last\n\
7720 breakpoint set.", NULL));
7723 add_com ("lb", class_breakpoint, breakpoints_info,
7724 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7725 The \"Type\" column indicates one of:\n\
7726 \tbreakpoint - normal breakpoint\n\
7727 \twatchpoint - watchpoint\n\
7728 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7729 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7730 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7731 address and file/line number respectively.\n\n",
7732 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7733 are set to the address of the last breakpoint listed.\n\n\
7734 Convenience variable \"$bpnum\" contains the number of the last\n\
7735 breakpoint set.", NULL));
7737 add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints,
7738 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7739 The \"Type\" column indicates one of:\n\
7740 \tbreakpoint - normal breakpoint\n\
7741 \twatchpoint - watchpoint\n\
7742 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7743 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7744 \tuntil - internal breakpoint used by the \"until\" command\n\
7745 \tfinish - internal breakpoint used by the \"finish\" command\n",
7746 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7747 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7748 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7749 address and file/line number respectively.\n\n",
7750 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7751 are set to the address of the last breakpoint listed.\n\n\
7752 Convenience variable \"$bpnum\" contains the number of the last\n\
7753 breakpoint set.", NULL),
7754 &maintenanceinfolist);
7756 add_com ("catch", class_breakpoint, catch_command,
7757 "Set catchpoints to catch events.\n\
7758 Raised signals may be caught:\n\
7759 \tcatch signal - all signals\n\
7760 \tcatch signal <signame> - a particular signal\n\
7761 Raised exceptions may be caught:\n\
7762 \tcatch throw - all exceptions, when thrown\n\
7763 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7764 \tcatch catch - all exceptions, when caught\n\
7765 \tcatch catch <exceptname> - a particular exception, when caught\n\
7766 Thread or process events may be caught:\n\
7767 \tcatch thread_start - any threads, just after creation\n\
7768 \tcatch thread_exit - any threads, just before expiration\n\
7769 \tcatch thread_join - any threads, just after joins\n\
7770 Process events may be caught:\n\
7771 \tcatch start - any processes, just after creation\n\
7772 \tcatch exit - any processes, just before expiration\n\
7773 \tcatch fork - calls to fork()\n\
7774 \tcatch vfork - calls to vfork()\n\
7775 \tcatch exec - calls to exec()\n\
7776 Dynamically-linked library events may be caught:\n\
7777 \tcatch load - loads of any library\n\
7778 \tcatch load <libname> - loads of a particular library\n\
7779 \tcatch unload - unloads of any library\n\
7780 \tcatch unload <libname> - unloads of a particular library\n\
7781 The act of your program's execution stopping may also be caught:\n\
7783 C++ exceptions may be caught:\n\
7784 \tcatch throw - all exceptions, when thrown\n\
7785 \tcatch catch - all exceptions, when caught\n\
7787 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7788 after a fork or vfork is caught.\n\n\
7789 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7791 add_com ("tcatch", class_breakpoint, tcatch_command,
7792 "Set temporary catchpoints to catch events.\n\
7793 Args like \"catch\" command.\n\
7794 Like \"catch\" except the catchpoint is only temporary,\n\
7795 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7796 by using \"enable delete\" on the catchpoint number.");
7798 c = add_com ("watch", class_breakpoint, watch_command,
7799 "Set a watchpoint for an expression.\n\
7800 A watchpoint stops execution of your program whenever the value of\n\
7801 an expression changes.");
7802 set_cmd_completer (c, location_completer);
7804 c = add_com ("rwatch", class_breakpoint, rwatch_command,
7805 "Set a read watchpoint for an expression.\n\
7806 A watchpoint stops execution of your program whenever the value of\n\
7807 an expression is read.");
7808 set_cmd_completer (c, location_completer);
7810 c = add_com ("awatch", class_breakpoint, awatch_command,
7811 "Set a watchpoint for an expression.\n\
7812 A watchpoint stops execution of your program whenever the value of\n\
7813 an expression is either read or written.");
7814 set_cmd_completer (c, location_completer);
7816 add_info ("watchpoints", breakpoints_info,
7817 "Synonym for ``info breakpoints''.");
7820 c = add_set_cmd ("can-use-hw-watchpoints", class_support, var_zinteger,
7821 (char *) &can_use_hw_watchpoints,
7822 "Set debugger's willingness to use watchpoint hardware.\n\
7823 If zero, gdb will not use hardware for new watchpoints, even if\n\
7824 such is available. (However, any hardware watchpoints that were\n\
7825 created before setting this to nonzero, will continue to use watchpoint\n\
7828 add_show_from_set (c, &showlist);
7830 can_use_hw_watchpoints = 1;