1 /* Everything about breakpoints, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
26 #include "breakpoint.h"
28 #include "expression.h"
34 #include "gdbthread.h"
37 #include "gdb_string.h"
43 #include "completer.h"
48 #include "gdb-events.h"
50 /* Prototypes for local functions. */
52 static void until_break_command_continuation (struct continuation_arg *arg);
54 static void catch_command_1 (char *, int, int);
56 static void enable_delete_command (char *, int);
58 static void enable_delete_breakpoint (struct breakpoint *);
60 static void enable_once_command (char *, int);
62 static void enable_once_breakpoint (struct breakpoint *);
64 static void disable_command (char *, int);
66 static void enable_command (char *, int);
68 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint *));
70 static void ignore_command (char *, int);
72 static int breakpoint_re_set_one (PTR);
74 static void clear_command (char *, int);
76 static void catch_command (char *, int);
78 static void handle_gnu_4_16_catch_command (char *, int, int);
80 static struct symtabs_and_lines get_catch_sals (int);
82 static void watch_command (char *, int);
84 static int can_use_hardware_watchpoint (struct value *);
86 static void break_at_finish_command (char *, int);
87 static void break_at_finish_at_depth_command (char *, int);
89 static void tbreak_at_finish_command (char *, int);
91 static void break_command_1 (char *, int, int);
93 static void mention (struct breakpoint *);
95 struct breakpoint *set_raw_breakpoint (struct symtab_and_line, enum bptype);
97 static void check_duplicates (struct breakpoint *);
99 static void describe_other_breakpoints (CORE_ADDR, asection *);
101 static void breakpoints_info (char *, int);
103 static void breakpoint_1 (int, int);
105 static bpstat bpstat_alloc (struct breakpoint *, bpstat);
107 static int breakpoint_cond_eval (PTR);
109 static void cleanup_executing_breakpoints (PTR);
111 static void commands_command (char *, int);
113 static void condition_command (char *, int);
115 static int get_number_trailer (char **, int);
117 void set_breakpoint_count (int);
120 static struct breakpoint *create_temp_exception_breakpoint (CORE_ADDR);
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 #ifdef GET_LONGJMP_TARGET
150 static void create_longjmp_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 static int internal_breakpoint_number = -1;
222 /* Are we executing breakpoint commands? */
223 static int executing_breakpoint_commands;
225 /* Walk the following statement or block through all breakpoints.
226 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
229 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
231 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
232 for (B = breakpoint_chain; \
233 B ? (TMP=B->next, 1): 0; \
236 /* True if SHIFT_INST_REGS defined, false otherwise. */
238 int must_shift_inst_regs =
239 #if defined(SHIFT_INST_REGS)
246 /* True if breakpoint hit counts should be displayed in breakpoint info. */
248 int show_breakpoint_hit_counts = 1;
250 /* Chain of all breakpoints defined. */
252 struct breakpoint *breakpoint_chain;
254 /* Number of last breakpoint made. */
256 int breakpoint_count;
258 /* Pointer to current exception event record */
259 static struct exception_event_record *current_exception_event;
261 /* Indicator of whether exception catchpoints should be nuked
262 between runs of a program */
263 int exception_catchpoints_are_fragile = 0;
265 /* Indicator of when exception catchpoints set-up should be
266 reinitialized -- e.g. when program is re-run */
267 int exception_support_initialized = 0;
269 /* This function returns a pointer to the string representation of the
270 pathname of the dynamically-linked library that has just been
273 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
274 or undefined results are guaranteed.
276 This string's contents are only valid immediately after the
277 inferior has stopped in the dynamic linker hook, and becomes
278 invalid as soon as the inferior is continued. Clients should make
279 a copy of this string if they wish to continue the inferior and
280 then access the string. */
282 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
283 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
286 /* This function returns a pointer to the string representation of the
287 pathname of the dynamically-linked library that has just been
290 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
291 TRUE, or undefined results are guaranteed.
293 This string's contents are only valid immediately after the
294 inferior has stopped in the dynamic linker hook, and becomes
295 invalid as soon as the inferior is continued. Clients should make
296 a copy of this string if they wish to continue the inferior and
297 then access the string. */
299 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
300 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
303 /* This function is called by the "catch load" command. It allows the
304 debugger to be notified by the dynamic linker when a specified
305 library file (or any library file, if filename is NULL) is loaded. */
307 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
308 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
309 error ("catch of library loads not yet implemented on this platform")
312 /* This function is called by the "catch unload" command. It allows
313 the debugger to be notified by the dynamic linker when a specified
314 library file (or any library file, if filename is NULL) is
317 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
318 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
319 error ("catch of library unloads not yet implemented on this platform")
322 /* Set breakpoint count to NUM. */
325 set_breakpoint_count (int num)
327 breakpoint_count = num;
328 set_internalvar (lookup_internalvar ("bpnum"),
329 value_from_longest (builtin_type_int, (LONGEST) num));
332 /* Used in run_command to zero the hit count when a new run starts. */
335 clear_breakpoint_hit_counts (void)
337 struct breakpoint *b;
343 /* Default address, symtab and line to put a breakpoint at
344 for "break" command with no arg.
345 if default_breakpoint_valid is zero, the other three are
346 not valid, and "break" with no arg is an error.
348 This set by print_stack_frame, which calls set_default_breakpoint. */
350 int default_breakpoint_valid;
351 CORE_ADDR default_breakpoint_address;
352 struct symtab *default_breakpoint_symtab;
353 int default_breakpoint_line;
355 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
356 Advance *PP after the string and any trailing whitespace.
358 Currently the string can either be a number or "$" followed by the name
359 of a convenience variable. Making it an expression wouldn't work well
360 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
362 TRAILER is a character which can be found after the number; most
363 commonly this is `-'. If you don't want a trailer, use \0. */
365 get_number_trailer (char **pp, int trailer)
367 int retval = 0; /* default */
371 /* Empty line means refer to the last breakpoint. */
372 return breakpoint_count;
375 /* Make a copy of the name, so we can null-terminate it
376 to pass to lookup_internalvar(). */
381 while (isalnum (*p) || *p == '_')
383 varname = (char *) alloca (p - start + 1);
384 strncpy (varname, start, p - start);
385 varname[p - start] = '\0';
386 val = value_of_internalvar (lookup_internalvar (varname));
387 if (TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_INT)
388 retval = (int) value_as_long (val);
391 printf_filtered ("Convenience variable must have integer value.\n");
399 while (*p >= '0' && *p <= '9')
402 /* There is no number here. (e.g. "cond a == b"). */
404 /* Skip non-numeric token */
405 while (*p && !isspace((int) *p))
407 /* Return zero, which caller must interpret as error. */
413 if (!(isspace (*p) || *p == '\0' || *p == trailer))
415 /* Trailing junk: return 0 and let caller print error msg. */
416 while (!(isspace (*p) || *p == '\0' || *p == trailer))
427 /* Like get_number_trailer, but don't allow a trailer. */
429 get_number (char **pp)
431 return get_number_trailer (pp, '\0');
434 /* Parse a number or a range.
435 * A number will be of the form handled by get_number.
436 * A range will be of the form <number1> - <number2>, and
437 * will represent all the integers between number1 and number2,
440 * While processing a range, this fuction is called iteratively;
441 * At each call it will return the next value in the range.
443 * At the beginning of parsing a range, the char pointer PP will
444 * be advanced past <number1> and left pointing at the '-' token.
445 * Subsequent calls will not advance the pointer until the range
446 * is completed. The call that completes the range will advance
447 * pointer PP past <number2>.
451 get_number_or_range (char **pp)
453 static int last_retval, end_value;
454 static char *end_ptr;
455 static int in_range = 0;
459 /* Default case: pp is pointing either to a solo number,
460 or to the first number of a range. */
461 last_retval = get_number_trailer (pp, '-');
466 /* This is the start of a range (<number1> - <number2>).
467 Skip the '-', parse and remember the second number,
468 and also remember the end of the final token. */
472 while (isspace ((int) *end_ptr))
473 end_ptr++; /* skip white space */
474 end_value = get_number (temp);
475 if (end_value < last_retval)
477 error ("inverted range");
479 else if (end_value == last_retval)
481 /* degenerate range (number1 == number2). Advance the
482 token pointer so that the range will be treated as a
491 error ("negative value");
494 /* pp points to the '-' that betokens a range. All
495 number-parsing has already been done. Return the next
496 integer value (one greater than the saved previous value).
497 Do not advance the token pointer 'pp' until the end of range
500 if (++last_retval == end_value)
502 /* End of range reached; advance token pointer. */
512 /* condition N EXP -- set break condition of breakpoint N to EXP. */
515 condition_command (char *arg, int from_tty)
517 register struct breakpoint *b;
522 error_no_arg ("breakpoint number");
525 bnum = get_number (&p);
527 error ("Bad breakpoint argument: '%s'", arg);
530 if (b->number == bnum)
537 if (b->cond_string != NULL)
538 xfree (b->cond_string);
543 b->cond_string = NULL;
545 printf_filtered ("Breakpoint %d now unconditional.\n", bnum);
550 /* I don't know if it matters whether this is the string the user
551 typed in or the decompiled expression. */
552 b->cond_string = savestring (arg, strlen (arg));
553 b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0);
555 error ("Junk at end of expression");
557 breakpoints_changed ();
561 error ("No breakpoint number %d.", bnum);
566 commands_command (char *arg, int from_tty)
568 register struct breakpoint *b;
571 struct command_line *l;
573 /* If we allowed this, we would have problems with when to
574 free the storage, if we change the commands currently
577 if (executing_breakpoint_commands)
578 error ("Can't use the \"commands\" command among a breakpoint's commands.");
581 bnum = get_number (&p);
584 error ("Unexpected extra arguments following breakpoint number.");
587 if (b->number == bnum)
591 "Type commands for when breakpoint %d is hit, one per line.",
593 l = read_command_lines (tmpbuf, from_tty);
594 free_command_lines (&b->commands);
596 breakpoints_changed ();
599 error ("No breakpoint number %d.", bnum);
602 /* Like target_read_memory() but if breakpoints are inserted, return
603 the shadow contents instead of the breakpoints themselves.
605 Read "memory data" from whatever target or inferior we have.
606 Returns zero if successful, errno value if not. EIO is used
607 for address out of bounds. If breakpoints are inserted, returns
608 shadow contents, not the breakpoints themselves. From breakpoint.c. */
611 read_memory_nobpt (CORE_ADDR memaddr, char *myaddr, unsigned len)
614 struct breakpoint *b;
615 CORE_ADDR bp_addr = 0;
618 if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
619 /* No breakpoints on this machine. */
620 return target_read_memory (memaddr, myaddr, len);
624 if (b->type == bp_none)
625 warning ("reading through apparently deleted breakpoint #%d?",
628 /* memory breakpoint? */
629 if (b->type == bp_watchpoint
630 || b->type == bp_hardware_watchpoint
631 || b->type == bp_read_watchpoint
632 || b->type == bp_access_watchpoint)
637 /* Addresses and length of the part of the breakpoint that
639 /* XXXX The m68k, sh and h8300 have different local and remote
640 breakpoint values. BREAKPOINT_FROM_PC still manages to
641 correctly determine the breakpoints memory address and size
642 for these targets. */
643 bp_addr = b->address;
645 if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
650 if (bp_addr + bp_size <= memaddr)
651 /* The breakpoint is entirely before the chunk of memory we
654 if (bp_addr >= memaddr + len)
655 /* The breakpoint is entirely after the chunk of memory we are
658 /* Copy the breakpoint from the shadow contents, and recurse for
659 the things before and after. */
661 /* Offset within shadow_contents. */
664 if (bp_addr < memaddr)
666 /* Only copy the second part of the breakpoint. */
667 bp_size -= memaddr - bp_addr;
668 bptoffset = memaddr - bp_addr;
672 if (bp_addr + bp_size > memaddr + len)
674 /* Only copy the first part of the breakpoint. */
675 bp_size -= (bp_addr + bp_size) - (memaddr + len);
678 memcpy (myaddr + bp_addr - memaddr,
679 b->shadow_contents + bptoffset, bp_size);
681 if (bp_addr > memaddr)
683 /* Copy the section of memory before the breakpoint. */
684 status = read_memory_nobpt (memaddr, myaddr, bp_addr - memaddr);
689 if (bp_addr + bp_size < memaddr + len)
691 /* Copy the section of memory after the breakpoint. */
692 status = read_memory_nobpt (bp_addr + bp_size,
693 myaddr + bp_addr + bp_size - memaddr,
694 memaddr + len - (bp_addr + bp_size));
701 /* Nothing overlaps. Just call read_memory_noerr. */
702 return target_read_memory (memaddr, myaddr, len);
706 /* insert_breakpoints is used when starting or continuing the program.
707 remove_breakpoints is used when the program stops.
708 Both return zero if successful,
709 or an `errno' value if could not write the inferior. */
712 insert_breakpoints (void)
714 register struct breakpoint *b, *temp;
715 int return_val = 0; /* return success code. */
717 int disabled_breaks = 0;
719 static char message1[] = "Error inserting catchpoint %d:\n";
720 static char message[sizeof (message1) + 30];
723 ALL_BREAKPOINTS_SAFE (b, temp)
725 if (b->enable == permanent)
726 /* Permanent breakpoints cannot be inserted or removed. */
728 else if (b->type != bp_watchpoint
729 && b->type != bp_hardware_watchpoint
730 && b->type != bp_read_watchpoint
731 && b->type != bp_access_watchpoint
732 && b->type != bp_catch_fork
733 && b->type != bp_catch_vfork
734 && b->type != bp_catch_exec
735 && b->type != bp_catch_throw
736 && b->type != bp_catch_catch
737 && b->enable != disabled
738 && b->enable != shlib_disabled
739 && b->enable != call_disabled
743 if (b->type == bp_hardware_breakpoint)
744 val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
747 /* Check to see if breakpoint is in an overlay section;
748 if so, we should set the breakpoint at the LMA address.
749 Only if the section is currently mapped should we ALSO
750 set a break at the VMA address. */
751 if (overlay_debugging && b->section &&
752 section_is_overlay (b->section))
756 addr = overlay_unmapped_address (b->address, b->section);
757 val = target_insert_breakpoint (addr, b->shadow_contents);
758 /* This would be the time to check val, to see if the
759 breakpoint write to the load address succeeded.
760 However, this might be an ordinary occurrance, eg. if
761 the unmapped overlay is in ROM. */
762 val = 0; /* in case unmapped address failed */
763 if (section_is_mapped (b->section))
764 val = target_insert_breakpoint (b->address,
767 else /* ordinary (non-overlay) address */
768 val = target_insert_breakpoint (b->address, b->shadow_contents);
772 /* Can't set the breakpoint. */
773 #if defined (DISABLE_UNSETTABLE_BREAK)
774 if (DISABLE_UNSETTABLE_BREAK (b->address))
776 /* See also: disable_breakpoints_in_shlibs. */
778 b->enable = shlib_disabled;
779 if (!disabled_breaks)
781 target_terminal_ours_for_output ();
782 warning ("Cannot insert breakpoint %d:", b->number);
783 warning ("Temporarily disabling shared library breakpoints:");
786 warning ("breakpoint #%d ", b->number);
791 target_terminal_ours_for_output ();
792 warning ("Cannot insert breakpoint %d:", b->number);
793 #ifdef ONE_PROCESS_WRITETEXT
794 warning ("The same program may be running in another process.");
796 memory_error (val, b->address); /* which bombs us out */
803 return_val = val; /* remember failure */
805 else if (ep_is_exception_catchpoint (b)
806 && b->enable != disabled
807 && b->enable != shlib_disabled
808 && b->enable != call_disabled
813 /* If we get here, we must have a callback mechanism for exception
814 events -- with g++ style embedded label support, we insert
815 ordinary breakpoints and not catchpoints. */
816 /* Format possible error message */
817 sprintf (message, message1, b->number);
819 val = target_insert_breakpoint (b->address, b->shadow_contents);
822 /* Couldn't set breakpoint for some reason */
823 target_terminal_ours_for_output ();
824 warning ("Cannot insert catchpoint %d; disabling it.",
826 b->enable = disabled;
830 /* Bp set, now make sure callbacks are enabled */
832 args_for_catchpoint_enable args;
833 args.kind = b->type == bp_catch_catch ?
834 EX_EVENT_CATCH : EX_EVENT_THROW;
836 val = catch_errors (cover_target_enable_exception_callback,
838 message, RETURN_MASK_ALL);
839 if (val != 0 && val != -1)
843 /* Check if something went wrong; val == 0 can be ignored */
846 /* something went wrong */
847 target_terminal_ours_for_output ();
848 warning ("Cannot insert catchpoint %d; disabling it.",
850 b->enable = disabled;
855 return_val = val; /* remember failure */
858 else if ((b->type == bp_hardware_watchpoint ||
859 b->type == bp_read_watchpoint ||
860 b->type == bp_access_watchpoint)
861 && b->enable == enabled
862 && b->disposition != del_at_next_stop
866 struct frame_info *saved_frame;
867 int saved_level, within_current_scope;
868 value_ptr mark = value_mark ();
871 /* Save the current frame and level so we can restore it after
872 evaluating the watchpoint expression on its own frame. */
873 saved_frame = selected_frame;
874 saved_level = selected_frame_level;
876 /* Determine if the watchpoint is within scope. */
877 if (b->exp_valid_block == NULL)
878 within_current_scope = 1;
881 struct frame_info *fi;
883 /* There might be no current frame at this moment if we are
884 resuming from a step over a breakpoint.
885 Set up current frame before trying to find the watchpoint
887 get_current_frame ();
888 fi = find_frame_addr_in_frame_chain (b->watchpoint_frame);
889 within_current_scope = (fi != NULL);
890 if (within_current_scope)
891 select_frame (fi, -1);
894 if (within_current_scope)
896 /* Evaluate the expression and cut the chain of values
897 produced off from the value chain.
899 Make sure the value returned isn't lazy; we use
900 laziness to determine what memory GDB actually needed
901 in order to compute the value of the expression. */
902 v = evaluate_expression (b->exp);
904 value_release_to_mark (mark);
909 /* Look at each value on the value chain. */
910 for (; v; v = v->next)
912 /* If it's a memory location, and GDB actually needed
913 its contents to evaluate the expression, then we
915 if (VALUE_LVAL (v) == lval_memory
918 struct type *vtype = check_typedef (VALUE_TYPE (v));
920 /* We only watch structs and arrays if user asked
921 for it explicitly, never if they just happen to
922 appear in the middle of some value chain. */
923 if (v == b->val_chain
924 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
925 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
930 addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
931 len = TYPE_LENGTH (VALUE_TYPE (v));
933 if (b->type == bp_read_watchpoint)
935 else if (b->type == bp_access_watchpoint)
938 val = target_insert_watchpoint (addr, len, type);
941 /* Don't exit the loop, try to insert
942 every value on the value chain. That's
943 because we will be removing all the
944 watches below, and removing a
945 watchpoint we didn't insert could have
953 /* Failure to insert a watchpoint on any memory value in the
954 value chain brings us here. */
957 remove_breakpoint (b, mark_uninserted);
958 warning ("Could not insert hardware watchpoint %d.",
965 printf_filtered ("Hardware watchpoint %d deleted ", b->number);
966 printf_filtered ("because the program has left the block \n");
967 printf_filtered ("in which its expression is valid.\n");
968 if (b->related_breakpoint)
969 b->related_breakpoint->disposition = del_at_next_stop;
970 b->disposition = del_at_next_stop;
973 /* Restore the frame and level. */
974 if ((saved_frame != selected_frame) ||
975 (saved_level != selected_frame_level))
976 select_frame (saved_frame, saved_level);
979 return_val = val; /* remember failure */
981 else if ((b->type == bp_catch_fork
982 || b->type == bp_catch_vfork
983 || b->type == bp_catch_exec)
984 && b->enable == enabled
992 val = target_insert_fork_catchpoint (PIDGET (inferior_ptid));
995 val = target_insert_vfork_catchpoint (PIDGET (inferior_ptid));
998 val = target_insert_exec_catchpoint (PIDGET (inferior_ptid));
1001 warning ("Internal error, %s line %d.", __FILE__, __LINE__);
1006 target_terminal_ours_for_output ();
1007 warning ("Cannot insert catchpoint %d.", b->number);
1013 return_val = val; /* remember failure */
1022 remove_breakpoints (void)
1024 register struct breakpoint *b;
1031 val = remove_breakpoint (b, mark_uninserted);
1040 remove_hw_watchpoints (void)
1042 register struct breakpoint *b;
1048 && (b->type == bp_hardware_watchpoint
1049 || b->type == bp_read_watchpoint
1050 || b->type == bp_access_watchpoint))
1052 val = remove_breakpoint (b, mark_uninserted);
1061 reattach_breakpoints (int pid)
1063 register struct breakpoint *b;
1065 struct cleanup *old_chain = save_inferior_ptid ();
1067 /* Set inferior_ptid; remove_breakpoint uses this global. */
1068 inferior_ptid = pid_to_ptid (pid);
1073 remove_breakpoint (b, mark_inserted);
1074 if (b->type == bp_hardware_breakpoint)
1075 val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
1077 val = target_insert_breakpoint (b->address, b->shadow_contents);
1080 do_cleanups (old_chain);
1085 do_cleanups (old_chain);
1090 update_breakpoints_after_exec (void)
1092 struct breakpoint *b;
1093 struct breakpoint *temp;
1095 /* Doing this first prevents the badness of having delete_breakpoint()
1096 write a breakpoint's current "shadow contents" to lift the bp. That
1097 shadow is NOT valid after an exec()! */
1098 mark_breakpoints_out ();
1100 ALL_BREAKPOINTS_SAFE (b, temp)
1102 /* Solib breakpoints must be explicitly reset after an exec(). */
1103 if (b->type == bp_shlib_event)
1105 delete_breakpoint (b);
1109 /* Thread event breakpoints must be set anew after an exec(). */
1110 if (b->type == bp_thread_event)
1112 delete_breakpoint (b);
1116 /* Step-resume breakpoints are meaningless after an exec(). */
1117 if (b->type == bp_step_resume)
1119 delete_breakpoint (b);
1123 /* Ditto the sigtramp handler breakpoints. */
1124 if (b->type == bp_through_sigtramp)
1126 delete_breakpoint (b);
1130 /* Ditto the exception-handling catchpoints. */
1131 if ((b->type == bp_catch_catch) || (b->type == bp_catch_throw))
1133 delete_breakpoint (b);
1137 /* Don't delete an exec catchpoint, because else the inferior
1138 won't stop when it ought!
1140 Similarly, we probably ought to keep vfork catchpoints, 'cause
1141 on this target, we may not be able to stop when the vfork is
1142 seen, but only when the subsequent exec is seen. (And because
1143 deleting fork catchpoints here but not vfork catchpoints will
1144 seem mysterious to users, keep those too.)
1146 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1147 target address field, if any, is sufficient to have it be reset
1148 automagically. Certainly on HP-UX that's true.
1150 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1151 valid code address on some platforms (like the mn10200 and
1152 mn10300 simulators). We shouldn't assign any special
1153 interpretation to a breakpoint with a zero address. And in
1154 fact, GDB doesn't --- I can't see what that comment above is
1155 talking about. As far as I can tell, setting the address of a
1156 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1157 is meaningless, since those are implemented with HP-UX kernel
1158 hackery, not by storing breakpoint instructions somewhere. */
1159 if ((b->type == bp_catch_exec) ||
1160 (b->type == bp_catch_vfork) ||
1161 (b->type == bp_catch_fork))
1163 b->address = (CORE_ADDR) NULL;
1167 /* bp_finish is a special case. The only way we ought to be able
1168 to see one of these when an exec() has happened, is if the user
1169 caught a vfork, and then said "finish". Ordinarily a finish just
1170 carries them to the call-site of the current callee, by setting
1171 a temporary bp there and resuming. But in this case, the finish
1172 will carry them entirely through the vfork & exec.
1174 We don't want to allow a bp_finish to remain inserted now. But
1175 we can't safely delete it, 'cause finish_command has a handle to
1176 the bp on a bpstat, and will later want to delete it. There's a
1177 chance (and I've seen it happen) that if we delete the bp_finish
1178 here, that its storage will get reused by the time finish_command
1179 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1180 We really must allow finish_command to delete a bp_finish.
1182 In the absense of a general solution for the "how do we know
1183 it's safe to delete something others may have handles to?"
1184 problem, what we'll do here is just uninsert the bp_finish, and
1185 let finish_command delete it.
1187 (We know the bp_finish is "doomed" in the sense that it's
1188 momentary, and will be deleted as soon as finish_command sees
1189 the inferior stopped. So it doesn't matter that the bp's
1190 address is probably bogus in the new a.out, unlike e.g., the
1191 solib breakpoints.) */
1193 if (b->type == bp_finish)
1198 /* Without a symbolic address, we have little hope of the
1199 pre-exec() address meaning the same thing in the post-exec()
1201 if (b->addr_string == NULL)
1203 delete_breakpoint (b);
1207 /* If this breakpoint has survived the above battery of checks, then
1208 it must have a symbolic address. Be sure that it gets reevaluated
1209 to a target address, rather than reusing the old evaluation.
1211 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1212 for bp_catch_exec and friends, I'm pretty sure this is entirely
1213 unnecessary. A call to breakpoint_re_set_one always recomputes
1214 the breakpoint's address from scratch, or deletes it if it can't.
1215 So I think this assignment could be deleted without effect. */
1216 b->address = (CORE_ADDR) NULL;
1221 detach_breakpoints (int pid)
1223 register struct breakpoint *b;
1225 struct cleanup *old_chain = save_inferior_ptid ();
1227 if (pid == PIDGET (inferior_ptid))
1228 error ("Cannot detach breakpoints of inferior_ptid");
1230 /* Set inferior_ptid; remove_breakpoint uses this global. */
1231 inferior_ptid = pid_to_ptid (pid);
1236 val = remove_breakpoint (b, mark_inserted);
1239 do_cleanups (old_chain);
1244 do_cleanups (old_chain);
1249 remove_breakpoint (struct breakpoint *b, insertion_state_t is)
1253 if (b->enable == permanent)
1254 /* Permanent breakpoints cannot be inserted or removed. */
1257 if (b->type == bp_none)
1258 warning ("attempted to remove apparently deleted breakpoint #%d?",
1261 if (b->type != bp_watchpoint
1262 && b->type != bp_hardware_watchpoint
1263 && b->type != bp_read_watchpoint
1264 && b->type != bp_access_watchpoint
1265 && b->type != bp_catch_fork
1266 && b->type != bp_catch_vfork
1267 && b->type != bp_catch_exec
1268 && b->type != bp_catch_catch
1269 && b->type != bp_catch_throw)
1271 if (b->type == bp_hardware_breakpoint)
1272 val = target_remove_hw_breakpoint (b->address, b->shadow_contents);
1275 /* Check to see if breakpoint is in an overlay section;
1276 if so, we should remove the breakpoint at the LMA address.
1277 If that is not equal to the raw address, then we should
1278 presumably remove the breakpoint there as well. */
1279 if (overlay_debugging && b->section &&
1280 section_is_overlay (b->section))
1284 addr = overlay_unmapped_address (b->address, b->section);
1285 val = target_remove_breakpoint (addr, b->shadow_contents);
1286 /* This would be the time to check val, to see if the
1287 shadow breakpoint write to the load address succeeded.
1288 However, this might be an ordinary occurrance, eg. if
1289 the unmapped overlay is in ROM. */
1290 val = 0; /* in case unmapped address failed */
1291 if (section_is_mapped (b->section))
1292 val = target_remove_breakpoint (b->address,
1293 b->shadow_contents);
1295 else /* ordinary (non-overlay) address */
1296 val = target_remove_breakpoint (b->address, b->shadow_contents);
1300 b->inserted = (is == mark_inserted);
1302 else if ((b->type == bp_hardware_watchpoint ||
1303 b->type == bp_read_watchpoint ||
1304 b->type == bp_access_watchpoint)
1305 && b->enable == enabled
1310 b->inserted = (is == mark_inserted);
1311 /* Walk down the saved value chain. */
1312 for (v = b->val_chain; v; v = v->next)
1314 /* For each memory reference remove the watchpoint
1316 if (VALUE_LVAL (v) == lval_memory
1317 && ! VALUE_LAZY (v))
1319 struct type *vtype = check_typedef (VALUE_TYPE (v));
1321 if (v == b->val_chain
1322 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
1323 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
1328 addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
1329 len = TYPE_LENGTH (VALUE_TYPE (v));
1331 if (b->type == bp_read_watchpoint)
1333 else if (b->type == bp_access_watchpoint)
1336 val = target_remove_watchpoint (addr, len, type);
1343 /* Failure to remove any of the hardware watchpoints comes here. */
1344 if ((is == mark_uninserted) && (b->inserted))
1345 warning ("Could not remove hardware watchpoint %d.",
1348 /* Free the saved value chain. We will construct a new one
1349 the next time the watchpoint is inserted. */
1350 for (v = b->val_chain; v; v = n)
1355 b->val_chain = NULL;
1357 else if ((b->type == bp_catch_fork ||
1358 b->type == bp_catch_vfork ||
1359 b->type == bp_catch_exec)
1360 && b->enable == enabled
1367 val = target_remove_fork_catchpoint (PIDGET (inferior_ptid));
1369 case bp_catch_vfork:
1370 val = target_remove_vfork_catchpoint (PIDGET (inferior_ptid));
1373 val = target_remove_exec_catchpoint (PIDGET (inferior_ptid));
1376 warning ("Internal error, %s line %d.", __FILE__, __LINE__);
1381 b->inserted = (is == mark_inserted);
1383 else if ((b->type == bp_catch_catch ||
1384 b->type == bp_catch_throw)
1385 && b->enable == enabled
1389 val = target_remove_breakpoint (b->address, b->shadow_contents);
1392 b->inserted = (is == mark_inserted);
1394 else if (ep_is_exception_catchpoint (b)
1395 && b->inserted /* sometimes previous insert doesn't happen */
1396 && b->enable == enabled
1400 val = target_remove_breakpoint (b->address, b->shadow_contents);
1404 b->inserted = (is == mark_inserted);
1410 /* Clear the "inserted" flag in all breakpoints. */
1413 mark_breakpoints_out (void)
1415 register struct breakpoint *b;
1421 /* Clear the "inserted" flag in all breakpoints and delete any
1422 breakpoints which should go away between runs of the program.
1424 Plus other such housekeeping that has to be done for breakpoints
1427 Note: this function gets called at the end of a run (by
1428 generic_mourn_inferior) and when a run begins (by
1429 init_wait_for_inferior). */
1434 breakpoint_init_inferior (enum inf_context context)
1436 register struct breakpoint *b, *temp;
1437 static int warning_needed = 0;
1439 ALL_BREAKPOINTS_SAFE (b, temp)
1446 case bp_watchpoint_scope:
1448 /* If the call dummy breakpoint is at the entry point it will
1449 cause problems when the inferior is rerun, so we better
1452 Also get rid of scope breakpoints. */
1453 delete_breakpoint (b);
1457 case bp_hardware_watchpoint:
1458 case bp_read_watchpoint:
1459 case bp_access_watchpoint:
1461 /* Likewise for watchpoints on local expressions. */
1462 if (b->exp_valid_block != NULL)
1463 delete_breakpoint (b);
1466 /* Likewise for exception catchpoints in dynamic-linked
1467 executables where required */
1468 if (ep_is_exception_catchpoint (b) &&
1469 exception_catchpoints_are_fragile)
1472 delete_breakpoint (b);
1478 if (exception_catchpoints_are_fragile)
1479 exception_support_initialized = 0;
1481 /* Don't issue the warning unless it's really needed... */
1482 if (warning_needed && (context != inf_exited))
1484 warning ("Exception catchpoints from last run were deleted.");
1485 warning ("You must reinsert them explicitly.");
1490 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1491 exists at PC. It returns ordinary_breakpoint_here if it's an
1492 ordinary breakpoint, or permanent_breakpoint_here if it's a
1493 permanent breakpoint.
1494 - When continuing from a location with an ordinary breakpoint, we
1495 actually single step once before calling insert_breakpoints.
1496 - When continuing from a localion with a permanent breakpoint, we
1497 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1498 the target, to advance the PC past the breakpoint. */
1500 enum breakpoint_here
1501 breakpoint_here_p (CORE_ADDR pc)
1503 register struct breakpoint *b;
1504 int any_breakpoint_here = 0;
1507 if ((b->enable == enabled
1508 || b->enable == permanent)
1509 && b->address == pc) /* bp is enabled and matches pc */
1511 if (overlay_debugging &&
1512 section_is_overlay (b->section) &&
1513 !section_is_mapped (b->section))
1514 continue; /* unmapped overlay -- can't be a match */
1515 else if (b->enable == permanent)
1516 return permanent_breakpoint_here;
1518 any_breakpoint_here = 1;
1521 return any_breakpoint_here ? ordinary_breakpoint_here : 0;
1525 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1526 but it only returns true if there is actually a breakpoint inserted
1530 breakpoint_inserted_here_p (CORE_ADDR pc)
1532 register struct breakpoint *b;
1536 && b->address == pc) /* bp is inserted and matches pc */
1538 if (overlay_debugging &&
1539 section_is_overlay (b->section) &&
1540 !section_is_mapped (b->section))
1541 continue; /* unmapped overlay -- can't be a match */
1549 /* Return nonzero if FRAME is a dummy frame. We can't use
1550 PC_IN_CALL_DUMMY because figuring out the saved SP would take too
1551 much time, at least using get_saved_register on the 68k. This
1552 means that for this function to work right a port must use the
1553 bp_call_dummy breakpoint. */
1556 frame_in_dummy (struct frame_info *frame)
1558 struct breakpoint *b;
1563 if (USE_GENERIC_DUMMY_FRAMES)
1564 return generic_pc_in_call_dummy (frame->pc, frame->frame, frame->frame);
1568 if (b->type == bp_call_dummy
1569 && b->frame == frame->frame
1570 /* We need to check the PC as well as the frame on the sparc,
1571 for signals.exp in the testsuite. */
1574 - SIZEOF_CALL_DUMMY_WORDS / sizeof (LONGEST) * REGISTER_SIZE))
1575 && frame->pc <= b->address)
1581 /* breakpoint_thread_match (PC, PID) returns true if the breakpoint at
1582 PC is valid for process/thread PID. */
1585 breakpoint_thread_match (CORE_ADDR pc, ptid_t ptid)
1587 struct breakpoint *b;
1590 thread = pid_to_thread_id (ptid);
1593 if (b->enable != disabled
1594 && b->enable != shlib_disabled
1595 && b->enable != call_disabled
1597 && (b->thread == -1 || b->thread == thread))
1599 if (overlay_debugging &&
1600 section_is_overlay (b->section) &&
1601 !section_is_mapped (b->section))
1602 continue; /* unmapped overlay -- can't be a match */
1611 /* bpstat stuff. External routines' interfaces are documented
1615 ep_is_catchpoint (struct breakpoint *ep)
1618 (ep->type == bp_catch_load)
1619 || (ep->type == bp_catch_unload)
1620 || (ep->type == bp_catch_fork)
1621 || (ep->type == bp_catch_vfork)
1622 || (ep->type == bp_catch_exec)
1623 || (ep->type == bp_catch_catch)
1624 || (ep->type == bp_catch_throw);
1626 /* ??rehrauer: Add more kinds here, as are implemented... */
1630 ep_is_shlib_catchpoint (struct breakpoint *ep)
1633 (ep->type == bp_catch_load)
1634 || (ep->type == bp_catch_unload);
1638 ep_is_exception_catchpoint (struct breakpoint *ep)
1641 (ep->type == bp_catch_catch)
1642 || (ep->type == bp_catch_throw);
1645 /* Clear a bpstat so that it says we are not at any breakpoint.
1646 Also free any storage that is part of a bpstat. */
1649 bpstat_clear (bpstat *bsp)
1660 if (p->old_val != NULL)
1661 value_free (p->old_val);
1668 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1669 is part of the bpstat is copied as well. */
1672 bpstat_copy (bpstat bs)
1676 bpstat retval = NULL;
1681 for (; bs != NULL; bs = bs->next)
1683 tmp = (bpstat) xmalloc (sizeof (*tmp));
1684 memcpy (tmp, bs, sizeof (*tmp));
1686 /* This is the first thing in the chain. */
1696 /* Find the bpstat associated with this breakpoint */
1699 bpstat_find_breakpoint (bpstat bsp, struct breakpoint *breakpoint)
1704 for (; bsp != NULL; bsp = bsp->next)
1706 if (bsp->breakpoint_at == breakpoint)
1712 /* Find a step_resume breakpoint associated with this bpstat.
1713 (If there are multiple step_resume bp's on the list, this function
1714 will arbitrarily pick one.)
1716 It is an error to use this function if BPSTAT doesn't contain a
1717 step_resume breakpoint.
1719 See wait_for_inferior's use of this function. */
1721 bpstat_find_step_resume_breakpoint (bpstat bsp)
1726 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1728 current_thread = pid_to_thread_id (inferior_ptid);
1730 for (; bsp != NULL; bsp = bsp->next)
1732 if ((bsp->breakpoint_at != NULL) &&
1733 (bsp->breakpoint_at->type == bp_step_resume) &&
1734 (bsp->breakpoint_at->thread == current_thread ||
1735 bsp->breakpoint_at->thread == -1))
1736 return bsp->breakpoint_at;
1739 error ("Internal error (no step_resume breakpoint found)");
1743 /* Return the breakpoint number of the first breakpoint we are stopped
1744 at. *BSP upon return is a bpstat which points to the remaining
1745 breakpoints stopped at (but which is not guaranteed to be good for
1746 anything but further calls to bpstat_num).
1747 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1750 bpstat_num (bpstat *bsp)
1752 struct breakpoint *b;
1755 return 0; /* No more breakpoint values */
1758 b = (*bsp)->breakpoint_at;
1759 *bsp = (*bsp)->next;
1761 return -1; /* breakpoint that's been deleted since */
1763 return b->number; /* We have its number */
1767 /* Modify BS so that the actions will not be performed. */
1770 bpstat_clear_actions (bpstat bs)
1772 for (; bs != NULL; bs = bs->next)
1774 bs->commands = NULL;
1775 if (bs->old_val != NULL)
1777 value_free (bs->old_val);
1783 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1786 cleanup_executing_breakpoints (PTR ignore)
1788 executing_breakpoint_commands = 0;
1791 /* Execute all the commands associated with all the breakpoints at this
1792 location. Any of these commands could cause the process to proceed
1793 beyond this point, etc. We look out for such changes by checking
1794 the global "breakpoint_proceeded" after each command. */
1797 bpstat_do_actions (bpstat *bsp)
1800 struct cleanup *old_chain;
1801 struct command_line *cmd;
1803 /* Avoid endless recursion if a `source' command is contained
1805 if (executing_breakpoint_commands)
1808 executing_breakpoint_commands = 1;
1809 old_chain = make_cleanup (cleanup_executing_breakpoints, 0);
1812 /* Note that (as of this writing), our callers all appear to
1813 be passing us the address of global stop_bpstat. And, if
1814 our calls to execute_control_command cause the inferior to
1815 proceed, that global (and hence, *bsp) will change.
1817 We must be careful to not touch *bsp unless the inferior
1818 has not proceeded. */
1820 /* This pointer will iterate over the list of bpstat's. */
1823 breakpoint_proceeded = 0;
1824 for (; bs != NULL; bs = bs->next)
1829 execute_control_command (cmd);
1831 if (breakpoint_proceeded)
1836 if (breakpoint_proceeded)
1837 /* The inferior is proceeded by the command; bomb out now.
1838 The bpstat chain has been blown away by wait_for_inferior.
1839 But since execution has stopped again, there is a new bpstat
1840 to look at, so start over. */
1843 bs->commands = NULL;
1846 executing_breakpoint_commands = 0;
1847 discard_cleanups (old_chain);
1850 /* This is the normal print function for a bpstat. In the future,
1851 much of this logic could (should?) be moved to bpstat_stop_status,
1852 by having it set different print_it values.
1854 Current scheme: When we stop, bpstat_print() is called. It loops
1855 through the bpstat list of things causing this stop, calling the
1856 print_bp_stop_message function on each one. The behavior of the
1857 print_bp_stop_message function depends on the print_it field of
1858 bpstat. If such field so indicates, call this function here.
1860 Return values from this routine (ultimately used by bpstat_print()
1861 and normal_stop() to decide what to do):
1862 PRINT_NOTHING: Means we already printed all we needed to print,
1863 don't print anything else.
1864 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
1865 that something to be followed by a location.
1866 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
1867 that something to be followed by a location.
1868 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
1871 static enum print_stop_action
1872 print_it_typical (bpstat bs)
1875 struct cleanup *old_chain;
1876 struct ui_stream *stb;
1877 stb = ui_out_stream_new (uiout);
1878 old_chain = make_cleanup_ui_out_stream_delete (stb);
1880 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
1881 which has since been deleted. */
1882 if (bs->breakpoint_at == NULL)
1883 return PRINT_UNKNOWN;
1885 switch (bs->breakpoint_at->type)
1888 case bp_hardware_breakpoint:
1890 annotate_breakpoint (bs->breakpoint_at->number);
1891 ui_out_text (uiout, "\nBreakpoint ");
1892 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
1893 ui_out_field_string (uiout, "reason", "breakpoint-hit");
1894 ui_out_field_int (uiout, "bkptno", bs->breakpoint_at->number);
1895 ui_out_text (uiout, ", ");
1896 return PRINT_SRC_AND_LOC;
1898 /* I think the user probably only wants to see one breakpoint
1899 number, not all of them. */
1900 annotate_breakpoint (bs->breakpoint_at->number);
1901 printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number);
1902 return PRINT_SRC_AND_LOC;
1906 case bp_shlib_event:
1907 /* Did we stop because the user set the stop_on_solib_events
1908 variable? (If so, we report this as a generic, "Stopped due
1909 to shlib event" message.) */
1910 printf_filtered ("Stopped due to shared library event\n");
1911 return PRINT_NOTHING;
1914 case bp_thread_event:
1915 /* Not sure how we will get here.
1916 GDB should not stop for these breakpoints. */
1917 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
1918 return PRINT_NOTHING;
1922 annotate_catchpoint (bs->breakpoint_at->number);
1923 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
1924 printf_filtered ("loaded");
1925 printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname);
1926 return PRINT_SRC_AND_LOC;
1929 case bp_catch_unload:
1930 annotate_catchpoint (bs->breakpoint_at->number);
1931 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
1932 printf_filtered ("unloaded");
1933 printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname);
1934 return PRINT_SRC_AND_LOC;
1938 annotate_catchpoint (bs->breakpoint_at->number);
1939 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
1940 printf_filtered ("forked");
1941 printf_filtered (" process %d), ",
1942 bs->breakpoint_at->forked_inferior_pid);
1943 return PRINT_SRC_AND_LOC;
1946 case bp_catch_vfork:
1947 annotate_catchpoint (bs->breakpoint_at->number);
1948 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
1949 printf_filtered ("vforked");
1950 printf_filtered (" process %d), ",
1951 bs->breakpoint_at->forked_inferior_pid);
1952 return PRINT_SRC_AND_LOC;
1956 annotate_catchpoint (bs->breakpoint_at->number);
1957 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
1958 bs->breakpoint_at->number,
1959 bs->breakpoint_at->exec_pathname);
1960 return PRINT_SRC_AND_LOC;
1963 case bp_catch_catch:
1964 if (current_exception_event &&
1965 (CURRENT_EXCEPTION_KIND == EX_EVENT_CATCH))
1967 annotate_catchpoint (bs->breakpoint_at->number);
1968 printf_filtered ("\nCatchpoint %d (exception caught), ",
1969 bs->breakpoint_at->number);
1970 printf_filtered ("throw location ");
1971 if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
1972 printf_filtered ("%s:%d",
1973 CURRENT_EXCEPTION_THROW_FILE,
1974 CURRENT_EXCEPTION_THROW_LINE);
1976 printf_filtered ("unknown");
1978 printf_filtered (", catch location ");
1979 if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
1980 printf_filtered ("%s:%d",
1981 CURRENT_EXCEPTION_CATCH_FILE,
1982 CURRENT_EXCEPTION_CATCH_LINE);
1984 printf_filtered ("unknown");
1986 printf_filtered ("\n");
1987 /* don't bother to print location frame info */
1988 return PRINT_SRC_ONLY;
1992 /* really throw, some other bpstat will handle it */
1993 return PRINT_UNKNOWN;
1997 case bp_catch_throw:
1998 if (current_exception_event &&
1999 (CURRENT_EXCEPTION_KIND == EX_EVENT_THROW))
2001 annotate_catchpoint (bs->breakpoint_at->number);
2002 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2003 bs->breakpoint_at->number);
2004 printf_filtered ("throw location ");
2005 if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
2006 printf_filtered ("%s:%d",
2007 CURRENT_EXCEPTION_THROW_FILE,
2008 CURRENT_EXCEPTION_THROW_LINE);
2010 printf_filtered ("unknown");
2012 printf_filtered (", catch location ");
2013 if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
2014 printf_filtered ("%s:%d",
2015 CURRENT_EXCEPTION_CATCH_FILE,
2016 CURRENT_EXCEPTION_CATCH_LINE);
2018 printf_filtered ("unknown");
2020 printf_filtered ("\n");
2021 /* don't bother to print location frame info */
2022 return PRINT_SRC_ONLY;
2026 /* really catch, some other bpstat will handle it */
2027 return PRINT_UNKNOWN;
2032 case bp_hardware_watchpoint:
2033 if (bs->old_val != NULL)
2035 annotate_watchpoint (bs->breakpoint_at->number);
2037 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
2038 ui_out_field_string (uiout, "reason", "watchpoint-trigger");
2039 mention (bs->breakpoint_at);
2040 ui_out_tuple_begin (uiout, "value");
2041 ui_out_text (uiout, "\nOld value = ");
2042 value_print (bs->old_val, stb->stream, 0, Val_pretty_default);
2043 ui_out_field_stream (uiout, "old", stb);
2044 ui_out_text (uiout, "\nNew value = ");
2045 value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default);
2046 ui_out_field_stream (uiout, "new", stb);
2047 ui_out_tuple_end (uiout);
2048 ui_out_text (uiout, "\n");
2050 mention (bs->breakpoint_at);
2051 printf_filtered ("\nOld value = ");
2052 value_print (bs->old_val, gdb_stdout, 0, Val_pretty_default);
2053 printf_filtered ("\nNew value = ");
2054 value_print (bs->breakpoint_at->val, gdb_stdout, 0,
2055 Val_pretty_default);
2056 printf_filtered ("\n");
2058 value_free (bs->old_val);
2061 /* More than one watchpoint may have been triggered. */
2062 return PRINT_UNKNOWN;
2065 case bp_read_watchpoint:
2067 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
2068 ui_out_field_string (uiout, "reason", "read-watchpoint-trigger");
2069 mention (bs->breakpoint_at);
2070 ui_out_tuple_begin (uiout, "value");
2071 ui_out_text (uiout, "\nValue = ");
2072 value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default);
2073 ui_out_field_stream (uiout, "value", stb);
2074 ui_out_tuple_end (uiout);
2075 ui_out_text (uiout, "\n");
2077 mention (bs->breakpoint_at);
2078 printf_filtered ("\nValue = ");
2079 value_print (bs->breakpoint_at->val, gdb_stdout, 0,
2080 Val_pretty_default);
2081 printf_filtered ("\n");
2083 return PRINT_UNKNOWN;
2086 case bp_access_watchpoint:
2088 if (bs->old_val != NULL)
2090 annotate_watchpoint (bs->breakpoint_at->number);
2091 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
2092 ui_out_field_string (uiout, "reason", "access-watchpoint-trigger");
2093 mention (bs->breakpoint_at);
2094 ui_out_tuple_begin (uiout, "value");
2095 ui_out_text (uiout, "\nOld value = ");
2096 value_print (bs->old_val, stb->stream, 0, Val_pretty_default);
2097 ui_out_field_stream (uiout, "old", stb);
2098 value_free (bs->old_val);
2100 ui_out_text (uiout, "\nNew value = ");
2104 mention (bs->breakpoint_at);
2105 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
2106 ui_out_field_string (uiout, "reason", "access-watchpoint-trigger");
2107 ui_out_tuple_begin (uiout, "value");
2108 ui_out_text (uiout, "\nValue = ");
2110 value_print (bs->breakpoint_at->val, stb->stream, 0,Val_pretty_default);
2111 ui_out_field_stream (uiout, "new", stb);
2112 ui_out_tuple_end (uiout);
2113 ui_out_text (uiout, "\n");
2115 if (bs->old_val != NULL)
2117 annotate_watchpoint (bs->breakpoint_at->number);
2118 mention (bs->breakpoint_at);
2119 printf_filtered ("\nOld value = ");
2120 value_print (bs->old_val, gdb_stdout, 0, Val_pretty_default);
2121 value_free (bs->old_val);
2123 printf_filtered ("\nNew value = ");
2127 mention (bs->breakpoint_at);
2128 printf_filtered ("\nValue = ");
2130 value_print (bs->breakpoint_at->val, gdb_stdout, 0,
2131 Val_pretty_default);
2132 printf_filtered ("\n");
2134 return PRINT_UNKNOWN;
2137 /* Fall through, we don't deal with these types of breakpoints
2142 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
2143 ui_out_field_string (uiout, "reason", "function-finished");
2145 return PRINT_UNKNOWN;
2150 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
2151 ui_out_field_string (uiout, "reason", "location-reached");
2153 return PRINT_UNKNOWN;
2158 case bp_longjmp_resume:
2159 case bp_step_resume:
2160 case bp_through_sigtramp:
2161 case bp_watchpoint_scope:
2164 return PRINT_UNKNOWN;
2168 /* Generic routine for printing messages indicating why we
2169 stopped. The behavior of this function depends on the value
2170 'print_it' in the bpstat structure. Under some circumstances we
2171 may decide not to print anything here and delegate the task to
2174 static enum print_stop_action
2175 print_bp_stop_message (bpstat bs)
2177 switch (bs->print_it)
2180 /* Nothing should be printed for this bpstat entry. */
2181 return PRINT_UNKNOWN;
2185 /* We still want to print the frame, but we already printed the
2186 relevant messages. */
2187 return PRINT_SRC_AND_LOC;
2190 case print_it_normal:
2191 /* Normal case, we handle everything in print_it_typical. */
2192 return print_it_typical (bs);
2195 internal_error (__FILE__, __LINE__,
2196 "print_bp_stop_message: unrecognized enum value");
2201 /* Print a message indicating what happened. This is called from
2202 normal_stop(). The input to this routine is the head of the bpstat
2203 list - a list of the eventpoints that caused this stop. This
2204 routine calls the generic print routine for printing a message
2205 about reasons for stopping. This will print (for example) the
2206 "Breakpoint n," part of the output. The return value of this
2209 PRINT_UNKNOWN: Means we printed nothing
2210 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2211 code to print the location. An example is
2212 "Breakpoint 1, " which should be followed by
2214 PRINT_SRC_ONLY: Means we printed something, but there is no need
2215 to also print the location part of the message.
2216 An example is the catch/throw messages, which
2217 don't require a location appended to the end.
2218 PRINT_NOTHING: We have done some printing and we don't need any
2219 further info to be printed.*/
2221 enum print_stop_action
2222 bpstat_print (bpstat bs)
2226 /* Maybe another breakpoint in the chain caused us to stop.
2227 (Currently all watchpoints go on the bpstat whether hit or not.
2228 That probably could (should) be changed, provided care is taken
2229 with respect to bpstat_explains_signal). */
2230 for (; bs; bs = bs->next)
2232 val = print_bp_stop_message (bs);
2233 if (val == PRINT_SRC_ONLY
2234 || val == PRINT_SRC_AND_LOC
2235 || val == PRINT_NOTHING)
2239 /* We reached the end of the chain, or we got a null BS to start
2240 with and nothing was printed. */
2241 return PRINT_UNKNOWN;
2244 /* Evaluate the expression EXP and return 1 if value is zero.
2245 This is used inside a catch_errors to evaluate the breakpoint condition.
2246 The argument is a "struct expression *" that has been cast to char * to
2247 make it pass through catch_errors. */
2250 breakpoint_cond_eval (PTR exp)
2252 value_ptr mark = value_mark ();
2253 int i = !value_true (evaluate_expression ((struct expression *) exp));
2254 value_free_to_mark (mark);
2258 /* Allocate a new bpstat and chain it to the current one. */
2261 bpstat_alloc (struct breakpoint *b, bpstat cbs /* Current "bs" value */ )
2265 bs = (bpstat) xmalloc (sizeof (*bs));
2267 bs->breakpoint_at = b;
2268 /* If the condition is false, etc., don't do the commands. */
2269 bs->commands = NULL;
2271 bs->print_it = print_it_normal;
2275 /* Possible return values for watchpoint_check (this can't be an enum
2276 because of check_errors). */
2277 /* The watchpoint has been deleted. */
2278 #define WP_DELETED 1
2279 /* The value has changed. */
2280 #define WP_VALUE_CHANGED 2
2281 /* The value has not changed. */
2282 #define WP_VALUE_NOT_CHANGED 3
2284 #define BP_TEMPFLAG 1
2285 #define BP_HARDWAREFLAG 2
2287 /* Check watchpoint condition. */
2290 watchpoint_check (PTR p)
2292 bpstat bs = (bpstat) p;
2293 struct breakpoint *b;
2294 struct frame_info *fr;
2295 int within_current_scope;
2297 b = bs->breakpoint_at;
2299 if (b->exp_valid_block == NULL)
2300 within_current_scope = 1;
2303 /* There is no current frame at this moment. If we're going to have
2304 any chance of handling watchpoints on local variables, we'll need
2305 the frame chain (so we can determine if we're in scope). */
2306 reinit_frame_cache ();
2307 fr = find_frame_addr_in_frame_chain (b->watchpoint_frame);
2308 within_current_scope = (fr != NULL);
2309 if (within_current_scope)
2310 /* If we end up stopping, the current frame will get selected
2311 in normal_stop. So this call to select_frame won't affect
2313 select_frame (fr, -1);
2316 if (within_current_scope)
2318 /* We use value_{,free_to_}mark because it could be a
2319 *long* time before we return to the command level and
2320 call free_all_values. We can't call free_all_values because
2321 we might be in the middle of evaluating a function call. */
2323 value_ptr mark = value_mark ();
2324 value_ptr new_val = evaluate_expression (bs->breakpoint_at->exp);
2325 if (!value_equal (b->val, new_val))
2327 release_value (new_val);
2328 value_free_to_mark (mark);
2329 bs->old_val = b->val;
2331 /* We will stop here */
2332 return WP_VALUE_CHANGED;
2336 /* Nothing changed, don't do anything. */
2337 value_free_to_mark (mark);
2338 /* We won't stop here */
2339 return WP_VALUE_NOT_CHANGED;
2344 /* This seems like the only logical thing to do because
2345 if we temporarily ignored the watchpoint, then when
2346 we reenter the block in which it is valid it contains
2347 garbage (in the case of a function, it may have two
2348 garbage values, one before and one after the prologue).
2349 So we can't even detect the first assignment to it and
2350 watch after that (since the garbage may or may not equal
2351 the first value assigned). */
2352 /* We print all the stop information in print_it_typical(), but
2353 in this case, by the time we call print_it_typical() this bp
2354 will be deleted already. So we have no choice but print the
2355 information here. */
2357 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
2358 ui_out_field_string (uiout, "reason", "watchpoint-scope");
2359 ui_out_text (uiout, "\nWatchpoint ");
2360 ui_out_field_int (uiout, "wpnum", bs->breakpoint_at->number);
2361 ui_out_text (uiout, " deleted because the program has left the block in\n\
2362 which its expression is valid.\n");
2365 Watchpoint %d deleted because the program has left the block in\n\
2366 which its expression is valid.\n", bs->breakpoint_at->number);
2369 if (b->related_breakpoint)
2370 b->related_breakpoint->disposition = del_at_next_stop;
2371 b->disposition = del_at_next_stop;
2377 /* Get a bpstat associated with having just stopped at address *PC
2378 and frame address CORE_ADDRESS. Update *PC to point at the
2379 breakpoint (if we hit a breakpoint). NOT_A_BREAKPOINT is nonzero
2380 if this is known to not be a real breakpoint (it could still be a
2381 watchpoint, though). */
2383 /* Determine whether we stopped at a breakpoint, etc, or whether we
2384 don't understand this stop. Result is a chain of bpstat's such that:
2386 if we don't understand the stop, the result is a null pointer.
2388 if we understand why we stopped, the result is not null.
2390 Each element of the chain refers to a particular breakpoint or
2391 watchpoint at which we have stopped. (We may have stopped for
2392 several reasons concurrently.)
2394 Each element of the chain has valid next, breakpoint_at,
2395 commands, FIXME??? fields. */
2398 bpstat_stop_status (CORE_ADDR *pc, int not_a_breakpoint)
2400 register struct breakpoint *b, *temp;
2402 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2403 int real_breakpoint = 0;
2404 /* Root of the chain of bpstat's */
2405 struct bpstats root_bs[1];
2406 /* Pointer to the last thing in the chain currently. */
2407 bpstat bs = root_bs;
2408 static char message1[] =
2409 "Error evaluating expression for watchpoint %d\n";
2410 char message[sizeof (message1) + 30 /* slop */ ];
2412 /* Get the address where the breakpoint would have been. */
2413 bp_addr = *pc - (not_a_breakpoint && !SOFTWARE_SINGLE_STEP_P () ?
2414 0 : DECR_PC_AFTER_BREAK);
2416 ALL_BREAKPOINTS_SAFE (b, temp)
2418 if (b->enable == disabled
2419 || b->enable == shlib_disabled
2420 || b->enable == call_disabled)
2423 if (b->type != bp_watchpoint
2424 && b->type != bp_hardware_watchpoint
2425 && b->type != bp_read_watchpoint
2426 && b->type != bp_access_watchpoint
2427 && b->type != bp_hardware_breakpoint
2428 && b->type != bp_catch_fork
2429 && b->type != bp_catch_vfork
2430 && b->type != bp_catch_exec
2431 && b->type != bp_catch_catch
2432 && b->type != bp_catch_throw) /* a non-watchpoint bp */
2433 if (b->address != bp_addr || /* address doesn't match or */
2434 (overlay_debugging && /* overlay doesn't match */
2435 section_is_overlay (b->section) &&
2436 !section_is_mapped (b->section)))
2439 if (b->type == bp_hardware_breakpoint
2440 && b->address != (*pc - DECR_PC_AFTER_HW_BREAK))
2443 /* Is this a catchpoint of a load or unload? If so, did we
2444 get a load or unload of the specified library? If not,
2446 if ((b->type == bp_catch_load)
2447 #if defined(SOLIB_HAVE_LOAD_EVENT)
2448 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid))
2449 || ((b->dll_pathname != NULL)
2450 && (strcmp (b->dll_pathname,
2451 SOLIB_LOADED_LIBRARY_PATHNAME (
2452 PIDGET (inferior_ptid)))
2458 if ((b->type == bp_catch_unload)
2459 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2460 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid))
2461 || ((b->dll_pathname != NULL)
2462 && (strcmp (b->dll_pathname,
2463 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2464 PIDGET (inferior_ptid)))
2470 if ((b->type == bp_catch_fork)
2471 && !target_has_forked (PIDGET (inferior_ptid),
2472 &b->forked_inferior_pid))
2475 if ((b->type == bp_catch_vfork)
2476 && !target_has_vforked (PIDGET (inferior_ptid),
2477 &b->forked_inferior_pid))
2480 if ((b->type == bp_catch_exec)
2481 && !target_has_execd (PIDGET (inferior_ptid), &b->exec_pathname))
2484 if (ep_is_exception_catchpoint (b) &&
2485 !(current_exception_event = target_get_current_exception_event ()))
2488 /* Come here if it's a watchpoint, or if the break address matches */
2490 bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */
2492 /* Watchpoints may change this, if not found to have triggered. */
2496 sprintf (message, message1, b->number);
2497 if (b->type == bp_watchpoint ||
2498 b->type == bp_hardware_watchpoint)
2500 switch (catch_errors (watchpoint_check, bs, message,
2504 /* We've already printed what needs to be printed. */
2505 /* Actually this is superfluous, because by the time we
2506 call print_it_typical() the wp will be already deleted,
2507 and the function will return immediately. */
2508 bs->print_it = print_it_done;
2511 case WP_VALUE_CHANGED:
2515 case WP_VALUE_NOT_CHANGED:
2517 bs->print_it = print_it_noop;
2524 /* Error from catch_errors. */
2525 printf_filtered ("Watchpoint %d deleted.\n", b->number);
2526 if (b->related_breakpoint)
2527 b->related_breakpoint->disposition = del_at_next_stop;
2528 b->disposition = del_at_next_stop;
2529 /* We've already printed what needs to be printed. */
2530 bs->print_it = print_it_done;
2536 else if (b->type == bp_read_watchpoint ||
2537 b->type == bp_access_watchpoint)
2543 addr = target_stopped_data_address ();
2546 for (v = b->val_chain; v; v = v->next)
2548 if (VALUE_LVAL (v) == lval_memory
2549 && ! VALUE_LAZY (v))
2551 struct type *vtype = check_typedef (VALUE_TYPE (v));
2553 if (v == b->val_chain
2554 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
2555 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
2559 vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
2560 /* Exact match not required. Within range is
2562 if (addr >= vaddr &&
2563 addr < vaddr + TYPE_LENGTH (VALUE_TYPE (v)))
2569 switch (catch_errors (watchpoint_check, bs, message,
2573 /* We've already printed what needs to be printed. */
2574 bs->print_it = print_it_done;
2577 case WP_VALUE_CHANGED:
2578 if (b->type == bp_read_watchpoint)
2580 /* Don't stop: read watchpoints shouldn't fire if
2581 the value has changed. This is for targets which
2582 cannot set read-only watchpoints. */
2583 bs->print_it = print_it_noop;
2589 case WP_VALUE_NOT_CHANGED:
2596 /* Error from catch_errors. */
2597 printf_filtered ("Watchpoint %d deleted.\n", b->number);
2598 if (b->related_breakpoint)
2599 b->related_breakpoint->disposition = del_at_next_stop;
2600 b->disposition = del_at_next_stop;
2601 /* We've already printed what needs to be printed. */
2602 bs->print_it = print_it_done;
2605 else /* found == 0 */
2607 /* This is a case where some watchpoint(s) triggered,
2608 but not at the address of this watchpoint (FOUND
2609 was left zero). So don't print anything for this
2611 bs->print_it = print_it_noop;
2618 /* By definition, an encountered breakpoint is a triggered
2622 real_breakpoint = 1;
2626 b->frame != (get_current_frame ())->frame)
2630 int value_is_zero = 0;
2634 /* Need to select the frame, with all that implies
2635 so that the conditions will have the right context. */
2636 select_frame (get_current_frame (), 0);
2638 = catch_errors (breakpoint_cond_eval, (b->cond),
2639 "Error in testing breakpoint condition:\n",
2641 /* FIXME-someday, should give breakpoint # */
2644 if (b->cond && value_is_zero)
2647 /* Don't consider this a hit. */
2650 else if (b->ignore_count > 0)
2653 annotate_ignore_count_change ();
2658 /* We will stop here */
2659 if (b->disposition == disable)
2660 b->enable = disabled;
2661 bs->commands = b->commands;
2665 (STREQ ("silent", bs->commands->line) ||
2666 (xdb_commands && STREQ ("Q", bs->commands->line))))
2668 bs->commands = bs->commands->next;
2673 /* Print nothing for this entry if we dont stop or if we dont print. */
2674 if (bs->stop == 0 || bs->print == 0)
2675 bs->print_it = print_it_noop;
2678 bs->next = NULL; /* Terminate the chain */
2679 bs = root_bs->next; /* Re-grab the head of the chain */
2681 if (real_breakpoint && bs)
2683 if (bs->breakpoint_at->type == bp_hardware_breakpoint)
2685 if (DECR_PC_AFTER_HW_BREAK != 0)
2687 *pc = *pc - DECR_PC_AFTER_HW_BREAK;
2693 if (DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs)
2696 #if defined (SHIFT_INST_REGS)
2698 #else /* No SHIFT_INST_REGS. */
2700 #endif /* No SHIFT_INST_REGS. */
2705 /* The value of a hardware watchpoint hasn't changed, but the
2706 intermediate memory locations we are watching may have. */
2707 if (bs && !bs->stop &&
2708 (bs->breakpoint_at->type == bp_hardware_watchpoint ||
2709 bs->breakpoint_at->type == bp_read_watchpoint ||
2710 bs->breakpoint_at->type == bp_access_watchpoint))
2712 remove_breakpoints ();
2713 insert_breakpoints ();
2718 /* Tell what to do about this bpstat. */
2720 bpstat_what (bpstat bs)
2722 /* Classify each bpstat as one of the following. */
2725 /* This bpstat element has no effect on the main_action. */
2728 /* There was a watchpoint, stop but don't print. */
2731 /* There was a watchpoint, stop and print. */
2734 /* There was a breakpoint but we're not stopping. */
2737 /* There was a breakpoint, stop but don't print. */
2740 /* There was a breakpoint, stop and print. */
2743 /* We hit the longjmp breakpoint. */
2746 /* We hit the longjmp_resume breakpoint. */
2749 /* We hit the step_resume breakpoint. */
2752 /* We hit the through_sigtramp breakpoint. */
2755 /* We hit the shared library event breakpoint. */
2758 /* We caught a shared library event. */
2761 /* This is just used to count how many enums there are. */
2765 /* Here is the table which drives this routine. So that we can
2766 format it pretty, we define some abbreviations for the
2767 enum bpstat_what codes. */
2768 #define kc BPSTAT_WHAT_KEEP_CHECKING
2769 #define ss BPSTAT_WHAT_STOP_SILENT
2770 #define sn BPSTAT_WHAT_STOP_NOISY
2771 #define sgl BPSTAT_WHAT_SINGLE
2772 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2773 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2774 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2775 #define sr BPSTAT_WHAT_STEP_RESUME
2776 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2777 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2778 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2780 /* "Can't happen." Might want to print an error message.
2781 abort() is not out of the question, but chances are GDB is just
2782 a bit confused, not unusable. */
2783 #define err BPSTAT_WHAT_STOP_NOISY
2785 /* Given an old action and a class, come up with a new action. */
2786 /* One interesting property of this table is that wp_silent is the same
2787 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2788 after stopping, the check for whether to step over a breakpoint
2789 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2790 reference to how we stopped. We retain separate wp_silent and
2791 bp_silent codes in case we want to change that someday.
2793 Another possibly interesting property of this table is that
2794 there's a partial ordering, priority-like, of the actions. Once
2795 you've decided that some action is appropriate, you'll never go
2796 back and decide something of a lower priority is better. The
2799 kc < clr sgl shl shlr slr sn sr ss ts
2800 sgl < clrs shl shlr slr sn sr ss ts
2801 slr < err shl shlr sn sr ss ts
2802 clr < clrs err shl shlr sn sr ss ts
2803 clrs < err shl shlr sn sr ss ts
2804 ss < shl shlr sn sr ts
2811 What I think this means is that we don't need a damned table
2812 here. If you just put the rows and columns in the right order,
2813 it'd look awfully regular. We could simply walk the bpstat list
2814 and choose the highest priority action we find, with a little
2815 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2816 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2817 is messy anyway). */
2819 /* step_resume entries: a step resume breakpoint overrides another
2820 breakpoint of signal handling (see comment in wait_for_inferior
2821 at first IN_SIGTRAMP where we set the step_resume breakpoint). */
2822 /* We handle the through_sigtramp_breakpoint the same way; having both
2823 one of those and a step_resume_breakpoint is probably very rare (?). */
2825 static const enum bpstat_what_main_action
2826 table[(int) class_last][(int) BPSTAT_WHAT_LAST] =
2829 /* kc ss sn sgl slr clr clrs sr ts shl shlr
2832 {kc, ss, sn, sgl, slr, clr, clrs, sr, ts, shl, shlr},
2834 {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
2836 {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
2838 {sgl, ss, sn, sgl, slr, clrs, clrs, sr, ts, shl, shlr},
2840 {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
2842 {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
2844 {slr, ss, sn, slr, slr, err, err, sr, ts, shl, shlr},
2846 {clr, ss, sn, clrs, err, err, err, sr, ts, shl, shlr},
2848 {sr, sr, sr, sr, sr, sr, sr, sr, ts, shl, shlr},
2850 {ts, ts, ts, ts, ts, ts, ts, ts, ts, shl, shlr},
2852 {shl, shl, shl, shl, shl, shl, shl, shl, ts, shl, shlr},
2854 {shlr, shlr, shlr, shlr, shlr, shlr, shlr, shlr, ts, shlr, shlr}
2869 enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
2870 struct bpstat_what retval;
2872 retval.call_dummy = 0;
2873 for (; bs != NULL; bs = bs->next)
2875 enum class bs_class = no_effect;
2876 if (bs->breakpoint_at == NULL)
2877 /* I suspect this can happen if it was a momentary breakpoint
2878 which has since been deleted. */
2880 switch (bs->breakpoint_at->type)
2886 case bp_hardware_breakpoint:
2892 bs_class = bp_noisy;
2894 bs_class = bp_silent;
2897 bs_class = bp_nostop;
2900 case bp_hardware_watchpoint:
2901 case bp_read_watchpoint:
2902 case bp_access_watchpoint:
2906 bs_class = wp_noisy;
2908 bs_class = wp_silent;
2911 /* There was a watchpoint, but we're not stopping.
2912 This requires no further action. */
2913 bs_class = no_effect;
2916 bs_class = long_jump;
2918 case bp_longjmp_resume:
2919 bs_class = long_resume;
2921 case bp_step_resume:
2924 bs_class = step_resume;
2927 /* It is for the wrong frame. */
2928 bs_class = bp_nostop;
2930 case bp_through_sigtramp:
2931 bs_class = through_sig;
2933 case bp_watchpoint_scope:
2934 bs_class = bp_nostop;
2936 case bp_shlib_event:
2937 bs_class = shlib_event;
2939 case bp_thread_event:
2940 bs_class = bp_nostop;
2943 case bp_catch_unload:
2944 /* Only if this catchpoint triggered should we cause the
2945 step-out-of-dld behaviour. Otherwise, we ignore this
2948 bs_class = catch_shlib_event;
2950 bs_class = no_effect;
2953 case bp_catch_vfork:
2958 bs_class = bp_noisy;
2960 bs_class = bp_silent;
2963 /* There was a catchpoint, but we're not stopping.
2964 This requires no further action. */
2965 bs_class = no_effect;
2967 case bp_catch_catch:
2968 if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_CATCH)
2969 bs_class = bp_nostop;
2971 bs_class = bs->print ? bp_noisy : bp_silent;
2973 case bp_catch_throw:
2974 if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_THROW)
2975 bs_class = bp_nostop;
2977 bs_class = bs->print ? bp_noisy : bp_silent;
2980 /* Make sure the action is stop (silent or noisy),
2981 so infrun.c pops the dummy frame. */
2982 bs_class = bp_silent;
2983 retval.call_dummy = 1;
2986 current_action = table[(int) bs_class][(int) current_action];
2988 retval.main_action = current_action;
2992 /* Nonzero if we should step constantly (e.g. watchpoints on machines
2993 without hardware support). This isn't related to a specific bpstat,
2994 just to things like whether watchpoints are set. */
2997 bpstat_should_step (void)
2999 struct breakpoint *b;
3001 if (b->enable == enabled && b->type == bp_watchpoint)
3006 /* Nonzero if there are enabled hardware watchpoints. */
3008 bpstat_have_active_hw_watchpoints (void)
3010 struct breakpoint *b;
3012 if ((b->enable == enabled) &&
3014 ((b->type == bp_hardware_watchpoint) ||
3015 (b->type == bp_read_watchpoint) ||
3016 (b->type == bp_access_watchpoint)))
3022 /* Given a bpstat that records zero or more triggered eventpoints, this
3023 function returns another bpstat which contains only the catchpoints
3024 on that first list, if any. */
3026 bpstat_get_triggered_catchpoints (bpstat ep_list, bpstat *cp_list)
3028 struct bpstats root_bs[1];
3029 bpstat bs = root_bs;
3030 struct breakpoint *ep;
3033 bpstat_clear (cp_list);
3034 root_bs->next = NULL;
3036 for (; ep_list != NULL; ep_list = ep_list->next)
3038 /* Is this eventpoint a catchpoint? If not, ignore it. */
3039 ep = ep_list->breakpoint_at;
3042 if ((ep->type != bp_catch_load) &&
3043 (ep->type != bp_catch_unload) &&
3044 (ep->type != bp_catch_catch) &&
3045 (ep->type != bp_catch_throw))
3046 /* pai: (temp) ADD fork/vfork here!! */
3049 /* Yes; add it to the list. */
3050 bs = bpstat_alloc (ep, bs);
3055 #if defined(SOLIB_ADD)
3056 /* Also, for each triggered catchpoint, tag it with the name of
3057 the library that caused this trigger. (We copy the name now,
3058 because it's only guaranteed to be available NOW, when the
3059 catchpoint triggers. Clients who may wish to know the name
3060 later must get it from the catchpoint itself.) */
3061 if (ep->triggered_dll_pathname != NULL)
3062 xfree (ep->triggered_dll_pathname);
3063 if (ep->type == bp_catch_load)
3064 dll_pathname = SOLIB_LOADED_LIBRARY_PATHNAME (
3065 PIDGET (inferior_ptid));
3067 dll_pathname = SOLIB_UNLOADED_LIBRARY_PATHNAME (
3068 PIDGET (inferior_ptid));
3070 dll_pathname = NULL;
3074 ep->triggered_dll_pathname = (char *)
3075 xmalloc (strlen (dll_pathname) + 1);
3076 strcpy (ep->triggered_dll_pathname, dll_pathname);
3079 ep->triggered_dll_pathname = NULL;
3085 /* Print B to gdb_stdout. */
3087 print_one_breakpoint (struct breakpoint *b,
3088 CORE_ADDR *last_addr)
3090 register struct command_line *l;
3091 register struct symbol *sym;
3092 struct ep_type_description
3097 static struct ep_type_description bptypes[] =
3099 {bp_none, "?deleted?"},
3100 {bp_breakpoint, "breakpoint"},
3101 {bp_hardware_breakpoint, "hw breakpoint"},
3102 {bp_until, "until"},
3103 {bp_finish, "finish"},
3104 {bp_watchpoint, "watchpoint"},
3105 {bp_hardware_watchpoint, "hw watchpoint"},
3106 {bp_read_watchpoint, "read watchpoint"},
3107 {bp_access_watchpoint, "acc watchpoint"},
3108 {bp_longjmp, "longjmp"},
3109 {bp_longjmp_resume, "longjmp resume"},
3110 {bp_step_resume, "step resume"},
3111 {bp_through_sigtramp, "sigtramp"},
3112 {bp_watchpoint_scope, "watchpoint scope"},
3113 {bp_call_dummy, "call dummy"},
3114 {bp_shlib_event, "shlib events"},
3115 {bp_thread_event, "thread events"},
3116 {bp_catch_load, "catch load"},
3117 {bp_catch_unload, "catch unload"},
3118 {bp_catch_fork, "catch fork"},
3119 {bp_catch_vfork, "catch vfork"},
3120 {bp_catch_exec, "catch exec"},
3121 {bp_catch_catch, "catch catch"},
3122 {bp_catch_throw, "catch throw"}
3125 static char *bpdisps[] =
3126 {"del", "dstp", "dis", "keep"};
3127 static char bpenables[] = "nynny";
3128 char wrap_indent[80];
3130 struct ui_stream *stb = ui_out_stream_new (uiout);
3131 struct cleanup *old_chain = make_cleanup_ui_out_stream_delete (stb);
3136 ui_out_tuple_begin (uiout, "bkpt");
3142 ui_out_field_int (uiout, "number", b->number);
3144 printf_filtered ("%-3d ", b->number);
3149 if (((int) b->type > (sizeof (bptypes) / sizeof (bptypes[0])))
3150 || ((int) b->type != bptypes[(int) b->type].type))
3151 internal_error (__FILE__, __LINE__,
3152 "bptypes table does not describe type #%d.",
3155 ui_out_field_string (uiout, "type", bptypes[(int) b->type].description);
3157 printf_filtered ("%-14s ", bptypes[(int) b->type].description);
3163 ui_out_field_string (uiout, "disp", bpdisps[(int) b->disposition]);
3165 printf_filtered ("%-4s ", bpdisps[(int) b->disposition]);
3171 ui_out_field_fmt (uiout, "enabled", "%c", bpenables[(int) b->enable]);
3172 ui_out_spaces (uiout, 2);
3174 printf_filtered ("%-3c ", bpenables[(int) b->enable]);
3178 strcpy (wrap_indent, " ");
3181 if (TARGET_ADDR_BIT <= 32)
3182 strcat (wrap_indent, " ");
3184 strcat (wrap_indent, " ");
3189 internal_error (__FILE__, __LINE__,
3190 "print_one_breakpoint: bp_none encountered\n");
3194 case bp_hardware_watchpoint:
3195 case bp_read_watchpoint:
3196 case bp_access_watchpoint:
3197 /* Field 4, the address, is omitted (which makes the columns
3198 not line up too nicely with the headers, but the effect
3199 is relatively readable). */
3202 ui_out_field_skip (uiout, "addr");
3204 print_expression (b->exp, stb->stream);
3205 ui_out_field_stream (uiout, "what", stb);
3208 print_expression (b->exp, gdb_stdout);
3213 case bp_catch_unload:
3214 /* Field 4, the address, is omitted (which makes the columns
3215 not line up too nicely with the headers, but the effect
3216 is relatively readable). */
3219 ui_out_field_skip (uiout, "addr");
3221 if (b->dll_pathname == NULL)
3223 ui_out_field_string (uiout, "what", "<any library>");
3224 ui_out_spaces (uiout, 1);
3228 ui_out_text (uiout, "library \"");
3229 ui_out_field_string (uiout, "what", b->dll_pathname);
3230 ui_out_text (uiout, "\" ");
3234 if (b->dll_pathname == NULL)
3235 printf_filtered ("<any library> ");
3237 printf_filtered ("library \"%s\" ", b->dll_pathname);
3242 case bp_catch_vfork:
3243 /* Field 4, the address, is omitted (which makes the columns
3244 not line up too nicely with the headers, but the effect
3245 is relatively readable). */
3248 ui_out_field_skip (uiout, "addr");
3250 if (b->forked_inferior_pid != 0)
3252 ui_out_text (uiout, "process ");
3253 ui_out_field_int (uiout, "what", b->forked_inferior_pid);
3254 ui_out_spaces (uiout, 1);
3258 if (b->forked_inferior_pid != 0)
3259 printf_filtered ("process %d ", b->forked_inferior_pid);
3264 /* Field 4, the address, is omitted (which makes the columns
3265 not line up too nicely with the headers, but the effect
3266 is relatively readable). */
3269 ui_out_field_skip (uiout, "addr");
3271 if (b->exec_pathname != NULL)
3273 ui_out_text (uiout, "program \"");
3274 ui_out_field_string (uiout, "what", b->exec_pathname);
3275 ui_out_text (uiout, "\" ");
3279 if (b->exec_pathname != NULL)
3280 printf_filtered ("program \"%s\" ", b->exec_pathname);
3284 case bp_catch_catch:
3285 /* Field 4, the address, is omitted (which makes the columns
3286 not line up too nicely with the headers, but the effect
3287 is relatively readable). */
3290 ui_out_field_skip (uiout, "addr");
3292 ui_out_field_string (uiout, "what", "exception catch");
3293 ui_out_spaces (uiout, 1);
3296 printf_filtered ("exception catch ");
3300 case bp_catch_throw:
3301 /* Field 4, the address, is omitted (which makes the columns
3302 not line up too nicely with the headers, but the effect
3303 is relatively readable). */
3306 ui_out_field_skip (uiout, "addr");
3308 ui_out_field_string (uiout, "what", "exception throw");
3309 ui_out_spaces (uiout, 1);
3312 printf_filtered ("exception throw ");
3317 case bp_hardware_breakpoint:
3321 case bp_longjmp_resume:
3322 case bp_step_resume:
3323 case bp_through_sigtramp:
3324 case bp_watchpoint_scope:
3326 case bp_shlib_event:
3327 case bp_thread_event:
3332 ui_out_field_core_addr (uiout, "addr", b->address);
3335 *last_addr = b->address;
3338 sym = find_pc_sect_function (b->address, b->section);
3341 ui_out_text (uiout, "in ");
3342 ui_out_field_string (uiout, "func",
3343 SYMBOL_SOURCE_NAME (sym));
3344 ui_out_wrap_hint (uiout, wrap_indent);
3345 ui_out_text (uiout, " at ");
3347 ui_out_field_string (uiout, "file", b->source_file);
3348 ui_out_text (uiout, ":");
3349 ui_out_field_int (uiout, "line", b->line_number);
3353 print_address_symbolic (b->address, stb->stream, demangle, "");
3354 ui_out_field_stream (uiout, "at", stb);
3363 if (TARGET_ADDR_BIT <= 32)
3364 tmp = longest_local_hex_string_custom (b->address
3365 & (CORE_ADDR) 0xffffffff,
3368 tmp = longest_local_hex_string_custom (b->address, "016l");
3370 printf_filtered ("%s ", tmp);
3373 *last_addr = b->address;
3376 sym = find_pc_sect_function (b->address, b->section);
3379 fputs_filtered ("in ", gdb_stdout);
3380 fputs_filtered (SYMBOL_SOURCE_NAME (sym), gdb_stdout);
3381 wrap_here (wrap_indent);
3382 fputs_filtered (" at ", gdb_stdout);
3384 fputs_filtered (b->source_file, gdb_stdout);
3385 printf_filtered (":%d", b->line_number);
3388 print_address_symbolic (b->address, gdb_stdout, demangle, " ");
3393 if (b->thread != -1)
3396 /* FIXME: This seems to be redundant and lost here; see the
3397 "stop only in" line a little further down. */
3398 ui_out_text (uiout, " thread ");
3399 ui_out_field_int (uiout, "thread", b->thread);
3401 printf_filtered (" thread %d", b->thread);
3406 ui_out_text (uiout, "\n");
3408 printf_filtered ("\n");
3415 ui_out_text (uiout, "\tstop only in stack frame at ");
3416 ui_out_field_core_addr (uiout, "frame", b->frame);
3417 ui_out_text (uiout, "\n");
3419 printf_filtered ("\tstop only in stack frame at ");
3420 print_address_numeric (b->frame, 1, gdb_stdout);
3421 printf_filtered ("\n");
3429 ui_out_text (uiout, "\tstop only if ");
3430 print_expression (b->cond, stb->stream);
3431 ui_out_field_stream (uiout, "cond", stb);
3432 ui_out_text (uiout, "\n");
3434 printf_filtered ("\tstop only if ");
3435 print_expression (b->cond, gdb_stdout);
3436 printf_filtered ("\n");
3440 if (b->thread != -1)
3442 /* FIXME should make an annotation for this */
3444 ui_out_text (uiout, "\tstop only in thread ");
3445 ui_out_field_int (uiout, "thread", b->thread);
3446 ui_out_text (uiout, "\n");
3448 printf_filtered ("\tstop only in thread %d\n", b->thread);
3452 if (show_breakpoint_hit_counts && b->hit_count)
3454 /* FIXME should make an annotation for this */
3456 if (ep_is_catchpoint (b))
3457 ui_out_text (uiout, "\tcatchpoint");
3459 ui_out_text (uiout, "\tbreakpoint");
3460 ui_out_text (uiout, " already hit ");
3461 ui_out_field_int (uiout, "times", b->hit_count);
3462 if (b->hit_count == 1)
3463 ui_out_text (uiout, " time\n");
3465 ui_out_text (uiout, " times\n");
3467 if (ep_is_catchpoint (b))
3468 printf_filtered ("\tcatchpoint");
3470 printf_filtered ("\tbreakpoint");
3471 printf_filtered (" already hit %d time%s\n",
3472 b->hit_count, (b->hit_count == 1 ? "" : "s"));
3477 /* Output the count also if it is zero, but only if this is
3478 mi. FIXME: Should have a better test for this. */
3479 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
3480 if (show_breakpoint_hit_counts && b->hit_count == 0)
3481 ui_out_field_int (uiout, "times", b->hit_count);
3484 if (b->ignore_count)
3488 ui_out_text (uiout, "\tignore next ");
3489 ui_out_field_int (uiout, "ignore", b->ignore_count);
3490 ui_out_text (uiout, " hits\n");
3492 printf_filtered ("\tignore next %d hits\n", b->ignore_count);
3496 if ((l = b->commands))
3500 ui_out_tuple_begin (uiout, "script");
3501 print_command_lines (uiout, l, 4);
3502 ui_out_tuple_end (uiout);
3506 print_command_line (l, 4, gdb_stdout);
3512 ui_out_tuple_end (uiout);
3513 do_cleanups (old_chain);
3517 struct captured_breakpoint_query_args
3523 do_captured_breakpoint_query (void *data)
3525 struct captured_breakpoint_query_args *args = data;
3526 register struct breakpoint *b;
3527 CORE_ADDR dummy_addr = 0;
3530 if (args->bnum == b->number)
3532 print_one_breakpoint (b, &dummy_addr);
3540 gdb_breakpoint_query (/* output object, */ int bnum)
3542 struct captured_breakpoint_query_args args;
3544 /* For the moment we don't trust print_one_breakpoint() to not throw
3546 return catch_errors (do_captured_breakpoint_query, &args,
3547 NULL, RETURN_MASK_ALL);
3550 /* Print information on breakpoint number BNUM, or -1 if all.
3551 If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS
3552 is nonzero, process only watchpoints. */
3555 breakpoint_1 (int bnum, int allflag)
3557 register struct breakpoint *b;
3558 CORE_ADDR last_addr = (CORE_ADDR) -1;
3559 int found_a_breakpoint = 0;
3563 ui_out_table_begin (uiout, 6, "BreakpointTable");
3565 ui_out_table_begin (uiout, 5, "BreakpointTable");
3570 || bnum == b->number)
3572 /* We only print out user settable breakpoints unless the
3575 && b->type != bp_breakpoint
3576 && b->type != bp_catch_load
3577 && b->type != bp_catch_unload
3578 && b->type != bp_catch_fork
3579 && b->type != bp_catch_vfork
3580 && b->type != bp_catch_exec
3581 && b->type != bp_catch_catch
3582 && b->type != bp_catch_throw
3583 && b->type != bp_hardware_breakpoint
3584 && b->type != bp_watchpoint
3585 && b->type != bp_read_watchpoint
3586 && b->type != bp_access_watchpoint
3587 && b->type != bp_hardware_watchpoint)
3590 if (!found_a_breakpoint++)
3592 annotate_breakpoints_headers ();
3595 ui_out_table_header (uiout, 3, ui_left, "Num"); /* 1 */
3597 ui_out_table_header (uiout, 14, ui_left, "Type"); /* 2 */
3599 ui_out_table_header (uiout, 4, ui_left, "Disp"); /* 3 */
3601 ui_out_table_header (uiout, 3, ui_left, "Enb"); /* 4 */
3605 if (TARGET_ADDR_BIT <= 32)
3606 ui_out_table_header (uiout, 10, ui_left, "Address"); /* 5 */
3608 ui_out_table_header (uiout, 18, ui_left, "Address"); /* 5 */
3611 ui_out_table_header (uiout, 40, ui_noalign, "What"); /* 6 */
3612 ui_out_table_body (uiout);
3615 printf_filtered ("Num ");
3617 printf_filtered ("Type ");
3619 printf_filtered ("Disp ");
3621 printf_filtered ("Enb ");
3625 if (TARGET_ADDR_BIT <= 32)
3626 printf_filtered ("Address ");
3628 printf_filtered ("Address ");
3631 printf_filtered ("What\n");
3633 annotate_breakpoints_table ();
3636 print_one_breakpoint (b, &last_addr);
3639 if (!found_a_breakpoint)
3643 ui_out_message (uiout, 0, "No breakpoints or watchpoints.\n");
3645 ui_out_message (uiout, 0, "No breakpoint or watchpoint number %d.\n",
3649 printf_filtered ("No breakpoints or watchpoints.\n");
3651 printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum);
3656 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3657 that a comparison of an unsigned with -1 is always false. */
3658 if (last_addr != (CORE_ADDR) -1)
3659 set_next_address (last_addr);
3663 ui_out_table_end (uiout);
3665 /* FIXME? Should this be moved up so that it is only called when
3666 there have been breakpoints? */
3667 annotate_breakpoints_table_end ();
3672 breakpoints_info (char *bnum_exp, int from_tty)
3677 bnum = parse_and_eval_long (bnum_exp);
3679 breakpoint_1 (bnum, 0);
3684 maintenance_info_breakpoints (char *bnum_exp, int from_tty)
3689 bnum = parse_and_eval_long (bnum_exp);
3691 breakpoint_1 (bnum, 1);
3694 /* Print a message describing any breakpoints set at PC. */
3697 describe_other_breakpoints (CORE_ADDR pc, asection *section)
3699 register int others = 0;
3700 register struct breakpoint *b;
3703 if (b->address == pc)
3704 if (overlay_debugging == 0 ||
3705 b->section == section)
3709 printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : "");
3711 if (b->address == pc)
3712 if (overlay_debugging == 0 ||
3713 b->section == section)
3716 printf_filtered ("%d%s%s ",
3718 ((b->enable == disabled ||
3719 b->enable == shlib_disabled ||
3720 b->enable == call_disabled) ? " (disabled)"
3721 : b->enable == permanent ? " (permanent)"
3724 : ((others == 1) ? " and" : ""));
3726 printf_filtered ("also set at pc ");
3727 print_address_numeric (pc, 1, gdb_stdout);
3728 printf_filtered (".\n");
3732 /* Set the default place to put a breakpoint
3733 for the `break' command with no arguments. */
3736 set_default_breakpoint (int valid, CORE_ADDR addr, struct symtab *symtab,
3739 default_breakpoint_valid = valid;
3740 default_breakpoint_address = addr;
3741 default_breakpoint_symtab = symtab;
3742 default_breakpoint_line = line;
3745 /* Return true iff it is meaningful to use the address member of
3746 BPT. For some breakpoint types, the address member is irrelevant
3747 and it makes no sense to attempt to compare it to other addresses
3748 (or use it for any other purpose either).
3750 More specifically, each of the following breakpoint types will always
3751 have a zero valued address and we don't want check_duplicates() to mark
3752 breakpoints of any of these types to be a duplicate of an actual
3753 breakpoint at address zero:
3756 bp_hardware_watchpoint
3758 bp_access_watchpoint
3765 breakpoint_address_is_meaningful (struct breakpoint *bpt)
3767 enum bptype type = bpt->type;
3769 return (type != bp_watchpoint
3770 && type != bp_hardware_watchpoint
3771 && type != bp_read_watchpoint
3772 && type != bp_access_watchpoint
3773 && type != bp_catch_exec
3774 && type != bp_longjmp_resume
3775 && type != bp_catch_fork
3776 && type != bp_catch_vfork);
3779 /* Rescan breakpoints at the same address and section as BPT,
3780 marking the first one as "first" and any others as "duplicates".
3781 This is so that the bpt instruction is only inserted once.
3782 If we have a permanent breakpoint at the same place as BPT, make
3783 that one the official one, and the rest as duplicates. */
3786 check_duplicates (struct breakpoint *bpt)
3788 register struct breakpoint *b;
3789 register int count = 0;
3790 struct breakpoint *perm_bp = 0;
3791 CORE_ADDR address = bpt->address;
3792 asection *section = bpt->section;
3794 if (! breakpoint_address_is_meaningful (bpt))
3798 if (b->enable != disabled
3799 && b->enable != shlib_disabled
3800 && b->enable != call_disabled
3801 && b->address == address
3802 && (overlay_debugging == 0 || b->section == section)
3803 && breakpoint_address_is_meaningful (b))
3805 /* Have we found a permanent breakpoint? */
3806 if (b->enable == permanent)
3813 b->duplicate = count > 1;
3816 /* If we found a permanent breakpoint at this address, go over the
3817 list again and declare all the other breakpoints there to be the
3821 perm_bp->duplicate = 0;
3823 /* Permanent breakpoint should always be inserted. */
3824 if (! perm_bp->inserted)
3825 internal_error (__FILE__, __LINE__,
3826 "allegedly permanent breakpoint is not "
3827 "actually inserted");
3833 internal_error (__FILE__, __LINE__,
3834 "another breakpoint was inserted on top of "
3835 "a permanent breakpoint");
3837 if (b->enable != disabled
3838 && b->enable != shlib_disabled
3839 && b->enable != call_disabled
3840 && b->address == address
3841 && (overlay_debugging == 0 || b->section == section)
3842 && breakpoint_address_is_meaningful (b))
3848 /* set_raw_breakpoint() is a low level routine for allocating and
3849 partially initializing a breakpoint of type BPTYPE. The newly
3850 created breakpoint's address, section, source file name, and line
3851 number are provided by SAL. The newly created and partially
3852 initialized breakpoint is added to the breakpoint chain and
3853 is also returned as the value of this function.
3855 It is expected that the caller will complete the initialization of
3856 the newly created breakpoint struct as well as output any status
3857 information regarding the creation of a new breakpoint. In
3858 particular, set_raw_breakpoint() does NOT set the breakpoint
3859 number! Care should be taken to not allow an error() to occur
3860 prior to completing the initialization of the breakpoint. If this
3861 should happen, a bogus breakpoint will be left on the chain. */
3864 set_raw_breakpoint (struct symtab_and_line sal, enum bptype bptype)
3866 register struct breakpoint *b, *b1;
3868 b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint));
3869 memset (b, 0, sizeof (*b));
3870 b->address = sal.pc;
3871 if (sal.symtab == NULL)
3872 b->source_file = NULL;
3874 b->source_file = savestring (sal.symtab->filename,
3875 strlen (sal.symtab->filename));
3876 b->section = sal.section;
3878 b->language = current_language->la_language;
3879 b->input_radix = input_radix;
3881 b->line_number = sal.line;
3882 b->enable = enabled;
3885 b->ignore_count = 0;
3888 b->dll_pathname = NULL;
3889 b->triggered_dll_pathname = NULL;
3890 b->forked_inferior_pid = 0;
3891 b->exec_pathname = NULL;
3893 /* Add this breakpoint to the end of the chain
3894 so that a list of breakpoints will come out in order
3895 of increasing numbers. */
3897 b1 = breakpoint_chain;
3899 breakpoint_chain = b;
3907 check_duplicates (b);
3908 breakpoints_changed ();
3914 /* Note that the breakpoint object B describes a permanent breakpoint
3915 instruction, hard-wired into the inferior's code. */
3917 make_breakpoint_permanent (struct breakpoint *b)
3919 b->enable = permanent;
3921 /* By definition, permanent breakpoints are already present in the code. */
3925 #ifdef GET_LONGJMP_TARGET
3928 create_longjmp_breakpoint (char *func_name)
3930 struct symtab_and_line sal;
3931 struct breakpoint *b;
3933 INIT_SAL (&sal); /* initialize to zeroes */
3934 if (func_name != NULL)
3936 struct minimal_symbol *m;
3938 m = lookup_minimal_symbol_text (func_name, NULL,
3939 (struct objfile *) NULL);
3941 sal.pc = SYMBOL_VALUE_ADDRESS (m);
3945 sal.section = find_pc_overlay (sal.pc);
3946 b = set_raw_breakpoint (sal,
3947 func_name != NULL ? bp_longjmp : bp_longjmp_resume);
3949 b->disposition = donttouch;
3950 b->enable = disabled;
3953 b->addr_string = xstrdup (func_name);
3954 b->number = internal_breakpoint_number--;
3957 #endif /* #ifdef GET_LONGJMP_TARGET */
3959 /* Call this routine when stepping and nexting to enable a breakpoint
3960 if we do a longjmp(). When we hit that breakpoint, call
3961 set_longjmp_resume_breakpoint() to figure out where we are going. */
3964 enable_longjmp_breakpoint (void)
3966 register struct breakpoint *b;
3969 if (b->type == bp_longjmp)
3971 b->enable = enabled;
3972 check_duplicates (b);
3977 disable_longjmp_breakpoint (void)
3979 register struct breakpoint *b;
3982 if (b->type == bp_longjmp
3983 || b->type == bp_longjmp_resume)
3985 b->enable = disabled;
3986 check_duplicates (b);
3991 create_thread_event_breakpoint (CORE_ADDR address)
3993 struct breakpoint *b;
3994 struct symtab_and_line sal;
3995 char addr_string[80]; /* Surely an addr can't be longer than that. */
3997 INIT_SAL (&sal); /* initialize to zeroes */
3999 sal.section = find_pc_overlay (sal.pc);
4000 b = set_raw_breakpoint (sal, bp_thread_event);
4002 b->number = internal_breakpoint_number--;
4003 b->disposition = donttouch;
4004 b->enable = enabled;
4005 /* addr_string has to be used or breakpoint_re_set will delete me. */
4006 sprintf (addr_string, "*0x%s", paddr (b->address));
4007 b->addr_string = xstrdup (addr_string);
4013 remove_thread_event_breakpoints (void)
4015 struct breakpoint *b, *temp;
4017 ALL_BREAKPOINTS_SAFE (b, temp)
4018 if (b->type == bp_thread_event)
4019 delete_breakpoint (b);
4024 remove_solib_event_breakpoints (void)
4026 register struct breakpoint *b, *temp;
4028 ALL_BREAKPOINTS_SAFE (b, temp)
4029 if (b->type == bp_shlib_event)
4030 delete_breakpoint (b);
4034 create_solib_event_breakpoint (CORE_ADDR address)
4036 struct breakpoint *b;
4037 struct symtab_and_line sal;
4039 INIT_SAL (&sal); /* initialize to zeroes */
4041 sal.section = find_pc_overlay (sal.pc);
4042 b = set_raw_breakpoint (sal, bp_shlib_event);
4043 b->number = internal_breakpoint_number--;
4044 b->disposition = donttouch;
4049 /* Disable any breakpoints that are on code in shared libraries. Only
4050 apply to enabled breakpoints, disabled ones can just stay disabled. */
4053 disable_breakpoints_in_shlibs (int silent)
4055 struct breakpoint *b;
4056 int disabled_shlib_breaks = 0;
4058 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4061 #if defined (PC_SOLIB)
4062 if (((b->type == bp_breakpoint) ||
4063 (b->type == bp_hardware_breakpoint)) &&
4064 b->enable == enabled &&
4066 PC_SOLIB (b->address))
4068 b->enable = shlib_disabled;
4071 if (!disabled_shlib_breaks)
4073 target_terminal_ours_for_output ();
4074 warning ("Temporarily disabling shared library breakpoints:");
4076 disabled_shlib_breaks = 1;
4077 warning ("breakpoint #%d ", b->number);
4084 /* Try to reenable any breakpoints in shared libraries. */
4086 re_enable_breakpoints_in_shlibs (void)
4088 struct breakpoint *b;
4091 if (b->enable == shlib_disabled)
4095 /* Do not reenable the breakpoint if the shared library
4096 is still not mapped in. */
4097 if (target_read_memory (b->address, buf, 1) == 0)
4098 b->enable = enabled;
4105 solib_load_unload_1 (char *hookname, int tempflag, char *dll_pathname,
4106 char *cond_string, enum bptype bp_kind)
4108 struct breakpoint *b;
4109 struct symtabs_and_lines sals;
4110 struct cleanup *old_chain;
4111 struct cleanup *canonical_strings_chain = NULL;
4112 char *addr_start = hookname;
4113 char *addr_end = NULL;
4114 char **canonical = (char **) NULL;
4115 int thread = -1; /* All threads. */
4117 /* Set a breakpoint on the specified hook. */
4118 sals = decode_line_1 (&hookname, 1, (struct symtab *) NULL, 0, &canonical);
4119 addr_end = hookname;
4121 if (sals.nelts == 0)
4123 warning ("Unable to set a breakpoint on dynamic linker callback.");
4124 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4125 warning ("GDB will be unable to track shl_load/shl_unload calls");
4128 if (sals.nelts != 1)
4130 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4131 warning ("GDB will be unable to track shl_load/shl_unload calls");
4135 /* Make sure that all storage allocated in decode_line_1 gets freed
4136 in case the following errors out. */
4137 old_chain = make_cleanup (xfree, sals.sals);
4138 if (canonical != (char **) NULL)
4140 make_cleanup (xfree, canonical);
4141 canonical_strings_chain = make_cleanup (null_cleanup, 0);
4142 if (canonical[0] != NULL)
4143 make_cleanup (xfree, canonical[0]);
4146 resolve_sal_pc (&sals.sals[0]);
4148 /* Remove the canonical strings from the cleanup, they are needed below. */
4149 if (canonical != (char **) NULL)
4150 discard_cleanups (canonical_strings_chain);
4152 b = set_raw_breakpoint (sals.sals[0], bp_kind);
4153 set_breakpoint_count (breakpoint_count + 1);
4154 b->number = breakpoint_count;
4156 b->cond_string = (cond_string == NULL) ?
4157 NULL : savestring (cond_string, strlen (cond_string));
4160 if (canonical != (char **) NULL && canonical[0] != NULL)
4161 b->addr_string = canonical[0];
4162 else if (addr_start)
4163 b->addr_string = savestring (addr_start, addr_end - addr_start);
4165 b->enable = enabled;
4166 b->disposition = tempflag ? del : donttouch;
4168 if (dll_pathname == NULL)
4169 b->dll_pathname = NULL;
4172 b->dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1);
4173 strcpy (b->dll_pathname, dll_pathname);
4177 do_cleanups (old_chain);
4181 create_solib_load_event_breakpoint (char *hookname, int tempflag,
4182 char *dll_pathname, char *cond_string)
4184 solib_load_unload_1 (hookname, tempflag, dll_pathname,
4185 cond_string, bp_catch_load);
4189 create_solib_unload_event_breakpoint (char *hookname, int tempflag,
4190 char *dll_pathname, char *cond_string)
4192 solib_load_unload_1 (hookname,tempflag, dll_pathname,
4193 cond_string, bp_catch_unload);
4197 create_fork_vfork_event_catchpoint (int tempflag, char *cond_string,
4198 enum bptype bp_kind)
4200 struct symtab_and_line sal;
4201 struct breakpoint *b;
4202 int thread = -1; /* All threads. */
4209 b = set_raw_breakpoint (sal, bp_kind);
4210 set_breakpoint_count (breakpoint_count + 1);
4211 b->number = breakpoint_count;
4213 b->cond_string = (cond_string == NULL) ?
4214 NULL : savestring (cond_string, strlen (cond_string));
4216 b->addr_string = NULL;
4217 b->enable = enabled;
4218 b->disposition = tempflag ? del : donttouch;
4219 b->forked_inferior_pid = 0;
4225 create_fork_event_catchpoint (int tempflag, char *cond_string)
4227 create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_fork);
4231 create_vfork_event_catchpoint (int tempflag, char *cond_string)
4233 create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_vfork);
4237 create_exec_event_catchpoint (int tempflag, char *cond_string)
4239 struct symtab_and_line sal;
4240 struct breakpoint *b;
4241 int thread = -1; /* All threads. */
4248 b = set_raw_breakpoint (sal, bp_catch_exec);
4249 set_breakpoint_count (breakpoint_count + 1);
4250 b->number = breakpoint_count;
4252 b->cond_string = (cond_string == NULL) ?
4253 NULL : savestring (cond_string, strlen (cond_string));
4255 b->addr_string = NULL;
4256 b->enable = enabled;
4257 b->disposition = tempflag ? del : donttouch;
4263 hw_breakpoint_used_count (void)
4265 register struct breakpoint *b;
4270 if (b->type == bp_hardware_breakpoint && b->enable == enabled)
4278 hw_watchpoint_used_count (enum bptype type, int *other_type_used)
4280 register struct breakpoint *b;
4283 *other_type_used = 0;
4286 if (b->enable == enabled)
4288 if (b->type == type)
4290 else if ((b->type == bp_hardware_watchpoint ||
4291 b->type == bp_read_watchpoint ||
4292 b->type == bp_access_watchpoint)
4293 && b->enable == enabled)
4294 *other_type_used = 1;
4300 /* Call this after hitting the longjmp() breakpoint. Use this to set
4301 a new breakpoint at the target of the jmp_buf.
4303 FIXME - This ought to be done by setting a temporary breakpoint
4304 that gets deleted automatically... */
4307 set_longjmp_resume_breakpoint (CORE_ADDR pc, struct frame_info *frame)
4309 register struct breakpoint *b;
4312 if (b->type == bp_longjmp_resume)
4315 b->enable = enabled;
4317 b->frame = frame->frame;
4320 check_duplicates (b);
4326 disable_watchpoints_before_interactive_call_start (void)
4328 struct breakpoint *b;
4332 if (((b->type == bp_watchpoint)
4333 || (b->type == bp_hardware_watchpoint)
4334 || (b->type == bp_read_watchpoint)
4335 || (b->type == bp_access_watchpoint)
4336 || ep_is_exception_catchpoint (b))
4337 && (b->enable == enabled))
4339 b->enable = call_disabled;
4340 check_duplicates (b);
4346 enable_watchpoints_after_interactive_call_stop (void)
4348 struct breakpoint *b;
4352 if (((b->type == bp_watchpoint)
4353 || (b->type == bp_hardware_watchpoint)
4354 || (b->type == bp_read_watchpoint)
4355 || (b->type == bp_access_watchpoint)
4356 || ep_is_exception_catchpoint (b))
4357 && (b->enable == call_disabled))
4359 b->enable = enabled;
4360 check_duplicates (b);
4366 /* Set a breakpoint that will evaporate an end of command
4367 at address specified by SAL.
4368 Restrict it to frame FRAME if FRAME is nonzero. */
4371 set_momentary_breakpoint (struct symtab_and_line sal, struct frame_info *frame,
4374 register struct breakpoint *b;
4375 b = set_raw_breakpoint (sal, type);
4376 b->enable = enabled;
4377 b->disposition = donttouch;
4378 b->frame = (frame ? frame->frame : 0);
4380 /* If we're debugging a multi-threaded program, then we
4381 want momentary breakpoints to be active in only a
4382 single thread of control. */
4383 if (in_thread_list (inferior_ptid))
4384 b->thread = pid_to_thread_id (inferior_ptid);
4390 /* Tell the user we have just set a breakpoint B. */
4393 mention (struct breakpoint *b)
4397 struct cleanup *old_chain;
4398 struct ui_stream *stb;
4400 stb = ui_out_stream_new (uiout);
4401 old_chain = make_cleanup_ui_out_stream_delete (stb);
4404 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4405 watchpoint) other than breakpoint creation. It should be possible to
4406 clean this up and at the same time replace the random calls to
4407 breakpoint_changed with this hook, as has already been done for
4408 delete_breakpoint_hook and so on. */
4409 if (create_breakpoint_hook)
4410 create_breakpoint_hook (b);
4411 breakpoint_create_event (b->number);
4416 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b->number);
4420 ui_out_text (uiout, "Watchpoint ");
4421 ui_out_tuple_begin (uiout, "wpt");
4422 ui_out_field_int (uiout, "number", b->number);
4423 ui_out_text (uiout, ": ");
4424 print_expression (b->exp, stb->stream);
4425 ui_out_field_stream (uiout, "exp", stb);
4426 ui_out_tuple_end (uiout);
4428 case bp_hardware_watchpoint:
4429 ui_out_text (uiout, "Hardware watchpoint ");
4430 ui_out_tuple_begin (uiout, "wpt");
4431 ui_out_field_int (uiout, "number", b->number);
4432 ui_out_text (uiout, ": ");
4433 print_expression (b->exp, stb->stream);
4434 ui_out_field_stream (uiout, "exp", stb);
4435 ui_out_tuple_end (uiout);
4439 printf_filtered ("Watchpoint %d: ", b->number);
4440 print_expression (b->exp, gdb_stdout);
4442 case bp_hardware_watchpoint:
4443 printf_filtered ("Hardware watchpoint %d: ", b->number);
4444 print_expression (b->exp, gdb_stdout);
4448 case bp_read_watchpoint:
4449 ui_out_text (uiout, "Hardware read watchpoint ");
4450 ui_out_tuple_begin (uiout, "hw-rwpt");
4451 ui_out_field_int (uiout, "number", b->number);
4452 ui_out_text (uiout, ": ");
4453 print_expression (b->exp, stb->stream);
4454 ui_out_field_stream (uiout, "exp", stb);
4455 ui_out_tuple_end (uiout);
4457 case bp_access_watchpoint:
4458 ui_out_text (uiout, "Hardware access (read/write) watchpoint ");
4459 ui_out_tuple_begin (uiout, "hw-awpt");
4460 ui_out_field_int (uiout, "number", b->number);
4461 ui_out_text (uiout, ": ");
4462 print_expression (b->exp, stb->stream);
4463 ui_out_field_stream (uiout, "exp", stb);
4464 ui_out_tuple_end (uiout);
4467 case bp_read_watchpoint:
4468 printf_filtered ("Hardware read watchpoint %d: ", b->number);
4469 print_expression (b->exp, gdb_stdout);
4471 case bp_access_watchpoint:
4472 printf_filtered ("Hardware access (read/write) watchpoint %d: ",
4474 print_expression (b->exp, gdb_stdout);
4479 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
4485 printf_filtered ("Breakpoint %d", b->number);
4488 case bp_hardware_breakpoint:
4490 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
4496 printf_filtered ("Hardware assisted breakpoint %d", b->number);
4500 case bp_catch_unload:
4501 printf_filtered ("Catchpoint %d (%s %s)",
4503 (b->type == bp_catch_load) ? "load" : "unload",
4504 (b->dll_pathname != NULL) ?
4505 b->dll_pathname : "<any library>");
4508 case bp_catch_vfork:
4509 printf_filtered ("Catchpoint %d (%s)",
4511 (b->type == bp_catch_fork) ? "fork" : "vfork");
4514 printf_filtered ("Catchpoint %d (exec)",
4517 case bp_catch_catch:
4518 case bp_catch_throw:
4519 printf_filtered ("Catchpoint %d (%s)",
4521 (b->type == bp_catch_catch) ? "catch" : "throw");
4527 case bp_longjmp_resume:
4528 case bp_step_resume:
4529 case bp_through_sigtramp:
4531 case bp_watchpoint_scope:
4532 case bp_shlib_event:
4533 case bp_thread_event:
4538 if (addressprint || b->source_file == NULL)
4540 printf_filtered (" at ");
4541 print_address_numeric (b->address, 1, gdb_stdout);
4544 printf_filtered (": file %s, line %d.",
4545 b->source_file, b->line_number);
4546 TUIDO (((TuiOpaqueFuncPtr) tui_vAllSetHasBreakAt, b, 1));
4547 TUIDO (((TuiOpaqueFuncPtr) tuiUpdateAllExecInfos));
4550 do_cleanups (old_chain);
4553 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
4556 printf_filtered ("\n");
4560 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4561 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4562 COND[i] and COND_STRING[i] values.
4564 NOTE: If the function succeeds, the caller is expected to cleanup
4565 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4566 array contents). If the function fails (error() is called), the
4567 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4568 COND and SALS arrays and each of those arrays contents. */
4571 create_breakpoints (struct symtabs_and_lines sals, char **addr_string,
4572 struct expression **cond, char **cond_string,
4573 enum bptype type, enum bpdisp disposition,
4574 int thread, int ignore_count, int from_tty)
4576 if (type == bp_hardware_breakpoint)
4578 int i = hw_breakpoint_used_count ();
4579 int target_resources_ok =
4580 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,
4582 if (target_resources_ok == 0)
4583 error ("No hardware breakpoint support in the target.");
4584 else if (target_resources_ok < 0)
4585 error ("Hardware breakpoints used exceeds limit.");
4588 /* Now set all the breakpoints. */
4591 for (i = 0; i < sals.nelts; i++)
4593 struct breakpoint *b;
4594 struct symtab_and_line sal = sals.sals[i];
4597 describe_other_breakpoints (sal.pc, sal.section);
4599 b = set_raw_breakpoint (sal, type);
4600 set_breakpoint_count (breakpoint_count + 1);
4601 b->number = breakpoint_count;
4604 b->addr_string = addr_string[i];
4605 b->cond_string = cond_string[i];
4606 b->ignore_count = ignore_count;
4607 b->enable = enabled;
4608 b->disposition = disposition;
4614 /* Parse ARG which is assumed to be a SAL specification possibly
4615 followed by conditionals. On return, SALS contains an array of SAL
4616 addresses found. ADDR_STRING contains a vector of (canonical)
4617 address strings. ARG points to the end of the SAL. */
4620 parse_breakpoint_sals (char **address,
4621 struct symtabs_and_lines *sals,
4622 char ***addr_string)
4624 char *addr_start = *address;
4625 *addr_string = NULL;
4626 /* If no arg given, or if first arg is 'if ', use the default
4628 if ((*address) == NULL
4629 || (strncmp ((*address), "if", 2) == 0 && isspace ((*address)[2])))
4631 if (default_breakpoint_valid)
4633 struct symtab_and_line sal;
4634 INIT_SAL (&sal); /* initialize to zeroes */
4635 sals->sals = (struct symtab_and_line *)
4636 xmalloc (sizeof (struct symtab_and_line));
4637 sal.pc = default_breakpoint_address;
4638 sal.line = default_breakpoint_line;
4639 sal.symtab = default_breakpoint_symtab;
4640 sal.section = find_pc_overlay (sal.pc);
4641 sals->sals[0] = sal;
4645 error ("No default breakpoint address now.");
4649 /* Force almost all breakpoints to be in terms of the
4650 current_source_symtab (which is decode_line_1's default). This
4651 should produce the results we want almost all of the time while
4652 leaving default_breakpoint_* alone. */
4653 if (default_breakpoint_valid
4654 && (!current_source_symtab
4655 || (strchr ("+-", (*address)[0]) != NULL)))
4656 *sals = decode_line_1 (address, 1, default_breakpoint_symtab,
4657 default_breakpoint_line, addr_string);
4659 *sals = decode_line_1 (address, 1, (struct symtab *) NULL, 0, addr_string);
4661 /* For any SAL that didn't have a canonical string, fill one in. */
4662 if (sals->nelts > 0 && *addr_string == NULL)
4663 *addr_string = xcalloc (sals->nelts, sizeof (char **));
4664 if (addr_start != (*address))
4667 for (i = 0; i < sals->nelts; i++)
4669 /* Add the string if not present. */
4670 if ((*addr_string)[i] == NULL)
4671 (*addr_string)[i] = savestring (addr_start, (*address) - addr_start);
4677 /* Convert each SAL into a real PC. Verify that the PC can be
4678 inserted as a breakpoint. If it can't throw an error. */
4681 breakpoint_sals_to_pc (struct symtabs_and_lines *sals,
4685 for (i = 0; i < sals->nelts; i++)
4687 resolve_sal_pc (&sals->sals[i]);
4689 /* It's possible for the PC to be nonzero, but still an illegal
4690 value on some targets.
4692 For example, on HP-UX if you start gdb, and before running the
4693 inferior you try to set a breakpoint on a shared library function
4694 "foo" where the inferior doesn't call "foo" directly but does
4695 pass its address to another function call, then we do find a
4696 minimal symbol for the "foo", but it's address is invalid.
4697 (Appears to be an index into a table that the loader sets up
4698 when the inferior is run.)
4700 Give the target a chance to bless sals.sals[i].pc before we
4701 try to make a breakpoint for it. */
4702 if (PC_REQUIRES_RUN_BEFORE_USE (sals->sals[i].pc))
4704 if (address == NULL)
4705 error ("Cannot break without a running program.");
4707 error ("Cannot break on %s without a running program.",
4713 /* Set a breakpoint according to ARG (function, linenum or *address)
4714 flag: first bit : 0 non-temporary, 1 temporary.
4715 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4718 break_command_1 (char *arg, int flag, int from_tty)
4720 int tempflag, hardwareflag;
4721 struct symtabs_and_lines sals;
4722 register struct expression **cond = 0;
4723 /* Pointers in arg to the start, and one past the end, of the
4725 char **cond_string = (char **) NULL;
4726 char *addr_start = arg;
4728 struct cleanup *old_chain;
4729 struct cleanup *breakpoint_chain = NULL;
4732 int ignore_count = 0;
4734 hardwareflag = flag & BP_HARDWAREFLAG;
4735 tempflag = flag & BP_TEMPFLAG;
4740 parse_breakpoint_sals (&arg, &sals, &addr_string);
4745 /* Create a chain of things that always need to be cleaned up. */
4746 old_chain = make_cleanup (null_cleanup, 0);
4748 /* Make sure that all storage allocated to SALS gets freed. */
4749 make_cleanup (xfree, sals.sals);
4751 /* Cleanup the addr_string array but not its contents. */
4752 make_cleanup (xfree, addr_string);
4754 /* Allocate space for all the cond expressions. */
4755 cond = xcalloc (sals.nelts, sizeof (struct expression *));
4756 make_cleanup (xfree, cond);
4758 /* Allocate space for all the cond strings. */
4759 cond_string = xcalloc (sals.nelts, sizeof (char **));
4760 make_cleanup (xfree, cond_string);
4762 /* ----------------------------- SNIP -----------------------------
4763 Anything added to the cleanup chain beyond this point is assumed
4764 to be part of a breakpoint. If the breakpoint create succeeds
4765 then the memory is not reclaimed. */
4766 breakpoint_chain = make_cleanup (null_cleanup, 0);
4768 /* Mark the contents of the addr_string for cleanup. These go on
4769 the breakpoint_chain and only occure if the breakpoint create
4771 for (i = 0; i < sals.nelts; i++)
4773 if (addr_string[i] != NULL)
4774 make_cleanup (xfree, addr_string[i]);
4777 /* Resolve all line numbers to PC's and verify that the addresses
4778 are ok for the target. */
4779 breakpoint_sals_to_pc (&sals, addr_start);
4781 /* Verify that condition can be parsed, before setting any
4782 breakpoints. Allocate a separate condition expression for each
4784 thread = -1; /* No specific thread yet */
4785 for (i = 0; i < sals.nelts; i++)
4792 char *cond_start = NULL;
4793 char *cond_end = NULL;
4794 while (*tok == ' ' || *tok == '\t')
4799 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
4802 toklen = end_tok - tok;
4804 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
4806 tok = cond_start = end_tok + 1;
4807 cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
4808 make_cleanup (xfree, cond[i]);
4810 cond_string[i] = savestring (cond_start, cond_end - cond_start);
4811 make_cleanup (xfree, cond_string[i]);
4813 else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
4819 thread = strtol (tok, &tok, 0);
4821 error ("Junk after thread keyword.");
4822 if (!valid_thread_id (thread))
4823 error ("Unknown thread %d\n", thread);
4826 error ("Junk at end of arguments.");
4830 create_breakpoints (sals, addr_string, cond, cond_string,
4831 hardwareflag ? bp_hardware_breakpoint : bp_breakpoint,
4832 tempflag ? del : donttouch,
4833 thread, ignore_count, from_tty);
4837 warning ("Multiple breakpoints were set.");
4838 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
4840 /* That's it. Discard the cleanups for data inserted into the
4842 discard_cleanups (breakpoint_chain);
4843 /* But cleanup everything else. */
4844 do_cleanups (old_chain);
4847 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
4848 linenum or *address) with COND and IGNORE_COUNT. */
4850 struct captured_breakpoint_args
4861 do_captured_breakpoint (void *data)
4863 struct captured_breakpoint_args *args = data;
4864 struct symtabs_and_lines sals;
4865 register struct expression **cond;
4866 struct cleanup *old_chain;
4867 struct cleanup *breakpoint_chain = NULL;
4874 /* Parse the source and lines spec. Delay check that the expression
4875 didn't contain trailing garbage until after cleanups are in
4879 address_end = args->address;
4881 parse_breakpoint_sals (&address_end, &sals, &addr_string);
4886 /* Create a chain of things at always need to be cleaned up. */
4887 old_chain = make_cleanup (null_cleanup, 0);
4889 /* Always have a addr_string array, even if it is empty. */
4890 make_cleanup (xfree, addr_string);
4892 /* Make sure that all storage allocated to SALS gets freed. */
4893 make_cleanup (xfree, sals.sals);
4895 /* Allocate space for all the cond expressions. */
4896 cond = xcalloc (sals.nelts, sizeof (struct expression *));
4897 make_cleanup (xfree, cond);
4899 /* Allocate space for all the cond strings. */
4900 cond_string = xcalloc (sals.nelts, sizeof (char **));
4901 make_cleanup (xfree, cond_string);
4903 /* ----------------------------- SNIP -----------------------------
4904 Anything added to the cleanup chain beyond this point is assumed
4905 to be part of a breakpoint. If the breakpoint create goes
4906 through then that memory is not cleaned up. */
4907 breakpoint_chain = make_cleanup (null_cleanup, 0);
4909 /* Mark the contents of the addr_string for cleanup. These go on
4910 the breakpoint_chain and only occure if the breakpoint create
4912 for (i = 0; i < sals.nelts; i++)
4914 if (addr_string[i] != NULL)
4915 make_cleanup (xfree, addr_string[i]);
4918 /* Wait until now before checking for garbage at the end of the
4919 address. That way cleanups can take care of freeing any
4921 if (*address_end != '\0')
4922 error ("Garbage %s following breakpoint address", address_end);
4924 /* Resolve all line numbers to PC's. */
4925 breakpoint_sals_to_pc (&sals, args->address);
4927 /* Verify that conditions can be parsed, before setting any
4929 for (i = 0; i < sals.nelts; i++)
4931 if (args->condition != NULL)
4933 char *tok = args->condition;
4934 cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
4936 error ("Garbage %s follows condition", tok);
4937 make_cleanup (xfree, cond[i]);
4938 cond_string[i] = xstrdup (args->condition);
4942 create_breakpoints (sals, addr_string, cond, cond_string,
4943 args->hardwareflag ? bp_hardware_breakpoint : bp_breakpoint,
4944 args->tempflag ? del : donttouch,
4945 args->thread, args->ignore_count, 0/*from-tty*/);
4947 /* That's it. Discard the cleanups for data inserted into the
4949 discard_cleanups (breakpoint_chain);
4950 /* But cleanup everything else. */
4951 do_cleanups (old_chain);
4956 gdb_breakpoint (char *address, char *condition,
4957 int hardwareflag, int tempflag,
4958 int thread, int ignore_count)
4960 struct captured_breakpoint_args args;
4961 args.address = address;
4962 args.condition = condition;
4963 args.hardwareflag = hardwareflag;
4964 args.tempflag = tempflag;
4965 args.thread = thread;
4966 args.ignore_count = ignore_count;
4967 return catch_errors (do_captured_breakpoint, &args,
4968 NULL, RETURN_MASK_ALL);
4973 break_at_finish_at_depth_command_1 (char *arg, int flag, int from_tty)
4975 struct frame_info *frame;
4976 CORE_ADDR low, high, selected_pc = 0;
4977 char *extra_args = NULL;
4980 int extra_args_len = 0, if_arg = 0;
4983 (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
4986 if (default_breakpoint_valid)
4990 selected_pc = selected_frame->pc;
4995 error ("No selected frame.");
4998 error ("No default breakpoint address now.");
5002 extra_args = strchr (arg, ' ');
5006 extra_args_len = strlen (extra_args);
5007 level_arg = (char *) xmalloc (extra_args - arg);
5008 strncpy (level_arg, arg, extra_args - arg - 1);
5009 level_arg[extra_args - arg - 1] = '\0';
5013 level_arg = (char *) xmalloc (strlen (arg) + 1);
5014 strcpy (level_arg, arg);
5017 frame = parse_frame_specification (level_arg);
5019 selected_pc = frame->pc;
5026 extra_args_len = strlen (arg);
5031 if (find_pc_partial_function (selected_pc, (char **) NULL, &low, &high))
5033 addr_string = (char *) xmalloc (26 + extra_args_len);
5035 sprintf (addr_string, "*0x%s %s", paddr_nz (high), extra_args);
5037 sprintf (addr_string, "*0x%s", paddr_nz (high));
5038 break_command_1 (addr_string, flag, from_tty);
5039 xfree (addr_string);
5042 error ("No function contains the specified address");
5045 error ("Unable to set breakpoint at procedure exit");
5050 break_at_finish_command_1 (char *arg, int flag, int from_tty)
5052 char *addr_string, *break_string, *beg_addr_string;
5053 CORE_ADDR low, high;
5054 struct symtabs_and_lines sals;
5055 struct symtab_and_line sal;
5056 struct cleanup *old_chain;
5057 char *extra_args = NULL;
5058 int extra_args_len = 0;
5062 (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
5064 if (default_breakpoint_valid)
5068 addr_string = (char *) xmalloc (15);
5069 sprintf (addr_string, "*0x%s", paddr_nz (selected_frame->pc));
5074 error ("No selected frame.");
5077 error ("No default breakpoint address now.");
5081 addr_string = (char *) xmalloc (strlen (arg) + 1);
5082 strcpy (addr_string, arg);
5088 extra_args_len = strlen (arg);
5092 /* get the stuff after the function name or address */
5093 extra_args = strchr (arg, ' ');
5097 extra_args_len = strlen (extra_args);
5104 beg_addr_string = addr_string;
5105 sals = decode_line_1 (&addr_string, 1, (struct symtab *) NULL, 0,
5108 xfree (beg_addr_string);
5109 old_chain = make_cleanup (xfree, sals.sals);
5110 for (i = 0; (i < sals.nelts); i++)
5113 if (find_pc_partial_function (sal.pc, (char **) NULL, &low, &high))
5115 break_string = (char *) xmalloc (extra_args_len + 26);
5117 sprintf (break_string, "*0x%s %s", paddr_nz (high), extra_args);
5119 sprintf (break_string, "*0x%s", paddr_nz (high));
5120 break_command_1 (break_string, flag, from_tty);
5121 xfree (break_string);
5124 error ("No function contains the specified address");
5128 warning ("Multiple breakpoints were set.\n");
5129 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5131 do_cleanups (old_chain);
5135 /* Helper function for break_command_1 and disassemble_command. */
5138 resolve_sal_pc (struct symtab_and_line *sal)
5142 if (sal->pc == 0 && sal->symtab != NULL)
5144 if (!find_line_pc (sal->symtab, sal->line, &pc))
5145 error ("No line %d in file \"%s\".",
5146 sal->line, sal->symtab->filename);
5150 if (sal->section == 0 && sal->symtab != NULL)
5152 struct blockvector *bv;
5157 bv = blockvector_for_pc_sect (sal->pc, 0, &index, sal->symtab);
5160 b = BLOCKVECTOR_BLOCK (bv, index);
5161 sym = block_function (b);
5164 fixup_symbol_section (sym, sal->symtab->objfile);
5165 sal->section = SYMBOL_BFD_SECTION (sym);
5169 /* It really is worthwhile to have the section, so we'll just
5170 have to look harder. This case can be executed if we have
5171 line numbers but no functions (as can happen in assembly
5174 struct minimal_symbol *msym;
5176 msym = lookup_minimal_symbol_by_pc (sal->pc);
5178 sal->section = SYMBOL_BFD_SECTION (msym);
5185 break_command (char *arg, int from_tty)
5187 break_command_1 (arg, 0, from_tty);
5191 break_at_finish_command (char *arg, int from_tty)
5193 break_at_finish_command_1 (arg, 0, from_tty);
5197 break_at_finish_at_depth_command (char *arg, int from_tty)
5199 break_at_finish_at_depth_command_1 (arg, 0, from_tty);
5203 tbreak_command (char *arg, int from_tty)
5205 break_command_1 (arg, BP_TEMPFLAG, from_tty);
5209 tbreak_at_finish_command (char *arg, int from_tty)
5211 break_at_finish_command_1 (arg, BP_TEMPFLAG, from_tty);
5215 hbreak_command (char *arg, int from_tty)
5217 break_command_1 (arg, BP_HARDWAREFLAG, from_tty);
5221 thbreak_command (char *arg, int from_tty)
5223 break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty);
5227 stop_command (char *arg, int from_tty)
5229 printf_filtered ("Specify the type of breakpoint to set.\n\
5230 Usage: stop in <function | address>\n\
5235 stopin_command (char *arg, int from_tty)
5239 if (arg == (char *) NULL)
5241 else if (*arg != '*')
5246 /* look for a ':'. If this is a line number specification, then
5247 say it is bad, otherwise, it should be an address or
5248 function/method name */
5249 while (*argptr && !hasColon)
5251 hasColon = (*argptr == ':');
5256 badInput = (*argptr != ':'); /* Not a class::method */
5258 badInput = isdigit (*arg); /* a simple line number */
5262 printf_filtered ("Usage: stop in <function | address>\n");
5264 break_command_1 (arg, 0, from_tty);
5268 stopat_command (char *arg, int from_tty)
5272 if (arg == (char *) NULL || *arg == '*') /* no line number */
5279 /* look for a ':'. If there is a '::' then get out, otherwise
5280 it is probably a line number. */
5281 while (*argptr && !hasColon)
5283 hasColon = (*argptr == ':');
5288 badInput = (*argptr == ':'); /* we have class::method */
5290 badInput = !isdigit (*arg); /* not a line number */
5294 printf_filtered ("Usage: stop at <line>\n");
5296 break_command_1 (arg, 0, from_tty);
5300 /* accessflag: hw_write: watch write,
5301 hw_read: watch read,
5302 hw_access: watch access (read or write) */
5304 watch_command_1 (char *arg, int accessflag, int from_tty)
5306 struct breakpoint *b;
5307 struct symtab_and_line sal;
5308 struct expression *exp;
5309 struct block *exp_valid_block;
5310 struct value *val, *mark;
5311 struct frame_info *frame;
5312 struct frame_info *prev_frame = NULL;
5313 char *exp_start = NULL;
5314 char *exp_end = NULL;
5315 char *tok, *end_tok;
5317 char *cond_start = NULL;
5318 char *cond_end = NULL;
5319 struct expression *cond = NULL;
5320 int i, other_type_used, target_resources_ok = 0;
5321 enum bptype bp_type;
5324 INIT_SAL (&sal); /* initialize to zeroes */
5326 /* Parse arguments. */
5327 innermost_block = NULL;
5329 exp = parse_exp_1 (&arg, 0, 0);
5331 exp_valid_block = innermost_block;
5332 mark = value_mark ();
5333 val = evaluate_expression (exp);
5334 release_value (val);
5335 if (VALUE_LAZY (val))
5336 value_fetch_lazy (val);
5339 while (*tok == ' ' || *tok == '\t')
5343 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
5346 toklen = end_tok - tok;
5347 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
5349 tok = cond_start = end_tok + 1;
5350 cond = parse_exp_1 (&tok, 0, 0);
5354 error ("Junk at end of command.");
5356 if (accessflag == hw_read)
5357 bp_type = bp_read_watchpoint;
5358 else if (accessflag == hw_access)
5359 bp_type = bp_access_watchpoint;
5361 bp_type = bp_hardware_watchpoint;
5363 mem_cnt = can_use_hardware_watchpoint (val);
5364 if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint)
5365 error ("Expression cannot be implemented with read/access watchpoint.");
5368 i = hw_watchpoint_used_count (bp_type, &other_type_used);
5369 target_resources_ok =
5370 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type, i + mem_cnt,
5372 if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint)
5373 error ("Target does not support this type of hardware watchpoint.");
5375 if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint)
5376 error ("Target can only support one kind of HW watchpoint at a time.");
5379 #if defined(HPUXHPPA)
5380 /* On HP-UX if you set a h/w
5381 watchpoint before the "run" command, the inferior dies with a e.g.,
5382 SIGILL once you start it. I initially believed this was due to a
5383 bad interaction between page protection traps and the initial
5384 startup sequence by the dynamic linker.
5386 However, I tried avoiding that by having HP-UX's implementation of
5387 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5388 yet, which forced slow watches before a "run" or "attach", and it
5389 still fails somewhere in the startup code.
5391 Until I figure out what's happening, I'm disallowing watches altogether
5392 before the "run" or "attach" command. We'll tell the user they must
5393 set watches after getting the program started. */
5394 if (!target_has_execution)
5396 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5399 #endif /* HPUXHPPA */
5401 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5402 watchpoint could not be set. */
5403 if (!mem_cnt || target_resources_ok <= 0)
5404 bp_type = bp_watchpoint;
5406 /* Now set up the breakpoint. */
5407 b = set_raw_breakpoint (sal, bp_type);
5408 set_breakpoint_count (breakpoint_count + 1);
5409 b->number = breakpoint_count;
5410 b->disposition = donttouch;
5412 b->exp_valid_block = exp_valid_block;
5413 b->exp_string = savestring (exp_start, exp_end - exp_start);
5417 b->cond_string = savestring (cond_start, cond_end - cond_start);
5421 frame = block_innermost_frame (exp_valid_block);
5424 prev_frame = get_prev_frame (frame);
5425 b->watchpoint_frame = frame->frame;
5428 b->watchpoint_frame = (CORE_ADDR) 0;
5430 /* If the expression is "local", then set up a "watchpoint scope"
5431 breakpoint at the point where we've left the scope of the watchpoint
5433 if (innermost_block)
5437 struct breakpoint *scope_breakpoint;
5438 struct symtab_and_line scope_sal;
5440 INIT_SAL (&scope_sal); /* initialize to zeroes */
5441 scope_sal.pc = get_frame_pc (prev_frame);
5442 scope_sal.section = find_pc_overlay (scope_sal.pc);
5444 scope_breakpoint = set_raw_breakpoint (scope_sal,
5445 bp_watchpoint_scope);
5446 set_breakpoint_count (breakpoint_count + 1);
5447 scope_breakpoint->number = breakpoint_count;
5449 scope_breakpoint->enable = enabled;
5451 /* Automatically delete the breakpoint when it hits. */
5452 scope_breakpoint->disposition = del;
5454 /* Only break in the proper frame (help with recursion). */
5455 scope_breakpoint->frame = prev_frame->frame;
5457 /* Set the address at which we will stop. */
5458 scope_breakpoint->address = get_frame_pc (prev_frame);
5460 /* The scope breakpoint is related to the watchpoint. We
5461 will need to act on them together. */
5462 b->related_breakpoint = scope_breakpoint;
5465 value_free_to_mark (mark);
5469 /* Return count of locations need to be watched and can be handled
5470 in hardware. If the watchpoint can not be handled
5471 in hardware return zero. */
5473 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5474 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5475 ((BYTE_SIZE) <= (REGISTER_SIZE))
5478 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5479 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5480 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5484 can_use_hardware_watchpoint (struct value *v)
5486 int found_memory_cnt = 0;
5487 struct value *head = v;
5489 /* Did the user specifically forbid us to use hardware watchpoints? */
5490 if (!can_use_hw_watchpoints)
5493 /* Make sure that the value of the expression depends only upon
5494 memory contents, and values computed from them within GDB. If we
5495 find any register references or function calls, we can't use a
5496 hardware watchpoint.
5498 The idea here is that evaluating an expression generates a series
5499 of values, one holding the value of every subexpression. (The
5500 expression a*b+c has five subexpressions: a, b, a*b, c, and
5501 a*b+c.) GDB's values hold almost enough information to establish
5502 the criteria given above --- they identify memory lvalues,
5503 register lvalues, computed values, etcetera. So we can evaluate
5504 the expression, and then scan the chain of values that leaves
5505 behind to decide whether we can detect any possible change to the
5506 expression's final value using only hardware watchpoints.
5508 However, I don't think that the values returned by inferior
5509 function calls are special in any way. So this function may not
5510 notice that an expression involving an inferior function call
5511 can't be watched with hardware watchpoints. FIXME. */
5512 for (; v; v = v->next)
5514 if (VALUE_LVAL (v) == lval_memory)
5517 /* A lazy memory lvalue is one that GDB never needed to fetch;
5518 we either just used its address (e.g., `a' in `a.b') or
5519 we never needed it at all (e.g., `a' in `a,b'). */
5523 /* Ahh, memory we actually used! Check if we can cover
5524 it with hardware watchpoints. */
5525 struct type *vtype = check_typedef (VALUE_TYPE (v));
5527 /* We only watch structs and arrays if user asked for it
5528 explicitly, never if they just happen to appear in a
5529 middle of some value chain. */
5531 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
5532 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
5534 CORE_ADDR vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
5535 int len = TYPE_LENGTH (VALUE_TYPE (v));
5537 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr, len))
5544 else if (v->lval != not_lval && v->modifiable == 0)
5545 return 0; /* ??? What does this represent? */
5546 else if (v->lval == lval_register)
5547 return 0; /* cannot watch a register with a HW watchpoint */
5550 /* The expression itself looks suitable for using a hardware
5551 watchpoint, but give the target machine a chance to reject it. */
5552 return found_memory_cnt;
5557 watch_command_wrapper (char *arg, int from_tty)
5559 watch_command (arg, from_tty);
5563 watch_command (char *arg, int from_tty)
5565 watch_command_1 (arg, hw_write, from_tty);
5570 rwatch_command_wrapper (char *arg, int from_tty)
5572 rwatch_command (arg, from_tty);
5576 rwatch_command (char *arg, int from_tty)
5578 watch_command_1 (arg, hw_read, from_tty);
5583 awatch_command_wrapper (char *arg, int from_tty)
5585 awatch_command (arg, from_tty);
5589 awatch_command (char *arg, int from_tty)
5591 watch_command_1 (arg, hw_access, from_tty);
5595 /* Helper routines for the until_command routine in infcmd.c. Here
5596 because it uses the mechanisms of breakpoints. */
5598 /* This function is called by fetch_inferior_event via the
5599 cmd_continuation pointer, to complete the until command. It takes
5600 care of cleaning up the temporary breakpoints set up by the until
5603 until_break_command_continuation (struct continuation_arg *arg)
5605 struct cleanup *cleanups;
5607 cleanups = (struct cleanup *) arg->data.pointer;
5608 do_exec_cleanups (cleanups);
5613 until_break_command (char *arg, int from_tty)
5615 struct symtabs_and_lines sals;
5616 struct symtab_and_line sal;
5617 struct frame_info *prev_frame = get_prev_frame (selected_frame);
5618 struct breakpoint *breakpoint;
5619 struct cleanup *old_chain;
5620 struct continuation_arg *arg1;
5623 clear_proceed_status ();
5625 /* Set a breakpoint where the user wants it and at return from
5628 if (default_breakpoint_valid)
5629 sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
5630 default_breakpoint_line, (char ***) NULL);
5632 sals = decode_line_1 (&arg, 1, (struct symtab *) NULL,
5633 0, (char ***) NULL);
5635 if (sals.nelts != 1)
5636 error ("Couldn't get information on specified line.");
5639 xfree (sals.sals); /* malloc'd, so freed */
5642 error ("Junk at end of arguments.");
5644 resolve_sal_pc (&sal);
5646 breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until);
5648 if (!event_loop_p || !target_can_async_p ())
5649 old_chain = make_cleanup_delete_breakpoint (breakpoint);
5651 old_chain = make_exec_cleanup_delete_breakpoint (breakpoint);
5653 /* If we are running asynchronously, and the target supports async
5654 execution, we are not waiting for the target to stop, in the call
5655 tp proceed, below. This means that we cannot delete the
5656 brekpoints until the target has actually stopped. The only place
5657 where we get a chance to do that is in fetch_inferior_event, so
5658 we must set things up for that. */
5660 if (event_loop_p && target_can_async_p ())
5662 /* In this case the arg for the continuation is just the point
5663 in the exec_cleanups chain from where to start doing
5664 cleanups, because all the continuation does is the cleanups in
5665 the exec_cleanup_chain. */
5667 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
5669 arg1->data.pointer = old_chain;
5671 add_continuation (until_break_command_continuation, arg1);
5674 /* Keep within the current frame */
5678 sal = find_pc_line (prev_frame->pc, 0);
5679 sal.pc = prev_frame->pc;
5680 breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until);
5681 if (!event_loop_p || !target_can_async_p ())
5682 make_cleanup_delete_breakpoint (breakpoint);
5684 make_exec_cleanup_delete_breakpoint (breakpoint);
5687 proceed (-1, TARGET_SIGNAL_DEFAULT, 0);
5688 /* Do the cleanups now, anly if we are not running asynchronously,
5689 of if we are, but the target is still synchronous. */
5690 if (!event_loop_p || !target_can_async_p ())
5691 do_cleanups (old_chain);
5695 /* These aren't used; I don't konw what they were for. */
5696 /* Set a breakpoint at the catch clause for NAME. */
5698 catch_breakpoint (char *name)
5703 disable_catch_breakpoint (void)
5708 delete_catch_breakpoint (void)
5713 enable_catch_breakpoint (void)
5720 struct sal_chain *next;
5721 struct symtab_and_line sal;
5725 /* Not really used -- invocation in handle_gnu_4_16_catch_command
5726 had been commented out in the v.4.16 sources, and stays
5727 disabled there now because "catch NAME" syntax isn't allowed.
5729 /* This isn't used; I don't know what it was for. */
5730 /* For each catch clause identified in ARGS, run FUNCTION
5731 with that clause as an argument. */
5732 static struct symtabs_and_lines
5733 map_catch_names (char *args, int (*function) ())
5735 register char *p = args;
5737 struct symtabs_and_lines sals;
5739 struct sal_chain *sal_chain = 0;
5743 error_no_arg ("one or more catch names");
5751 /* Don't swallow conditional part. */
5752 if (p1[0] == 'i' && p1[1] == 'f'
5753 && (p1[2] == ' ' || p1[2] == '\t'))
5759 while (isalnum (*p1) || *p1 == '_' || *p1 == '$')
5763 if (*p1 && *p1 != ' ' && *p1 != '\t')
5764 error ("Arguments must be catch names.");
5770 struct sal_chain *next = (struct sal_chain *)
5771 alloca (sizeof (struct sal_chain));
5772 next->next = sal_chain;
5773 next->sal = get_catch_sal (p);
5778 printf_unfiltered ("No catch clause for exception %s.\n", p);
5783 while (*p == ' ' || *p == '\t')
5789 /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
5791 static struct symtabs_and_lines
5792 get_catch_sals (int this_level_only)
5794 register struct blockvector *bl;
5795 register struct block *block;
5796 int index, have_default = 0;
5798 struct symtabs_and_lines sals;
5799 struct sal_chain *sal_chain = 0;
5800 char *blocks_searched;
5802 /* Not sure whether an error message is always the correct response,
5803 but it's better than a core dump. */
5804 if (selected_frame == NULL)
5805 error ("No selected frame.");
5806 block = get_frame_block (selected_frame);
5807 pc = selected_frame->pc;
5813 error ("No symbol table info available.\n");
5815 bl = blockvector_for_pc (BLOCK_END (block) - 4, &index);
5816 blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
5817 memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
5821 CORE_ADDR end = BLOCK_END (block) - 4;
5824 if (bl != blockvector_for_pc (end, &index))
5825 error ("blockvector blotch");
5826 if (BLOCKVECTOR_BLOCK (bl, index) != block)
5827 error ("blockvector botch");
5828 last_index = BLOCKVECTOR_NBLOCKS (bl);
5831 /* Don't print out blocks that have gone by. */
5832 while (index < last_index
5833 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc)
5836 while (index < last_index
5837 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end)
5839 if (blocks_searched[index] == 0)
5841 struct block *b = BLOCKVECTOR_BLOCK (bl, index);
5844 register struct symbol *sym;
5846 nsyms = BLOCK_NSYMS (b);
5848 for (i = 0; i < nsyms; i++)
5850 sym = BLOCK_SYM (b, i);
5851 if (STREQ (SYMBOL_NAME (sym), "default"))
5857 if (SYMBOL_CLASS (sym) == LOC_LABEL)
5859 struct sal_chain *next = (struct sal_chain *)
5860 alloca (sizeof (struct sal_chain));
5861 next->next = sal_chain;
5862 next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym),
5867 blocks_searched[index] = 1;
5873 if (sal_chain && this_level_only)
5876 /* After handling the function's top-level block, stop.
5877 Don't continue to its superblock, the block of
5878 per-file symbols. */
5879 if (BLOCK_FUNCTION (block))
5881 block = BLOCK_SUPERBLOCK (block);
5886 struct sal_chain *tmp_chain;
5888 /* Count the number of entries. */
5889 for (index = 0, tmp_chain = sal_chain; tmp_chain;
5890 tmp_chain = tmp_chain->next)
5894 sals.sals = (struct symtab_and_line *)
5895 xmalloc (index * sizeof (struct symtab_and_line));
5896 for (index = 0; sal_chain; sal_chain = sal_chain->next, index++)
5897 sals.sals[index] = sal_chain->sal;
5904 ep_skip_leading_whitespace (char **s)
5906 if ((s == NULL) || (*s == NULL))
5908 while (isspace (**s))
5912 /* This function examines a string, and attempts to find a token
5913 that might be an event name in the leading characters. If a
5914 possible match is found, a pointer to the last character of
5915 the token is returned. Else, NULL is returned. */
5918 ep_find_event_name_end (char *arg)
5921 char *event_name_end = NULL;
5923 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5927 /* We break out of the loop when we find a token delimiter.
5928 Basically, we're looking for alphanumerics and underscores;
5929 anything else delimites the token. */
5932 if (!isalnum (*s) && (*s != '_'))
5938 return event_name_end;
5942 /* This function attempts to parse an optional "if <cond>" clause
5943 from the arg string. If one is not found, it returns NULL.
5945 Else, it returns a pointer to the condition string. (It does not
5946 attempt to evaluate the string against a particular block.) And,
5947 it updates arg to point to the first character following the parsed
5948 if clause in the arg string. */
5951 ep_parse_optional_if_clause (char **arg)
5955 if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2]))
5958 /* Skip the "if" keyword. */
5961 /* Skip any extra leading whitespace, and record the start of the
5962 condition string. */
5963 ep_skip_leading_whitespace (arg);
5966 /* Assume that the condition occupies the remainder of the arg string. */
5967 (*arg) += strlen (cond_string);
5972 /* This function attempts to parse an optional filename from the arg
5973 string. If one is not found, it returns NULL.
5975 Else, it returns a pointer to the parsed filename. (This function
5976 makes no attempt to verify that a file of that name exists, or is
5977 accessible.) And, it updates arg to point to the first character
5978 following the parsed filename in the arg string.
5980 Note that clients needing to preserve the returned filename for
5981 future access should copy it to their own buffers. */
5983 ep_parse_optional_filename (char **arg)
5985 static char filename[1024];
5990 if ((*arg_p == '\0') || isspace (*arg_p))
6008 /* Commands to deal with catching events, such as signals, exceptions,
6009 process start/exit, etc. */
6013 catch_fork, catch_vfork
6017 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
6018 static void catch_fork_command_1 (catch_fork_kind fork_kind,
6019 char *arg, int tempflag, int from_tty);
6022 catch_fork_command_1 (catch_fork_kind fork_kind, char *arg, int tempflag,
6025 char *cond_string = NULL;
6027 ep_skip_leading_whitespace (&arg);
6029 /* The allowed syntax is:
6031 catch [v]fork if <cond>
6033 First, check if there's an if clause. */
6034 cond_string = ep_parse_optional_if_clause (&arg);
6036 if ((*arg != '\0') && !isspace (*arg))
6037 error ("Junk at end of arguments.");
6039 /* If this target supports it, create a fork or vfork catchpoint
6040 and enable reporting of such events. */
6044 create_fork_event_catchpoint (tempflag, cond_string);
6047 create_vfork_event_catchpoint (tempflag, cond_string);
6050 error ("unsupported or unknown fork kind; cannot catch it");
6056 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6058 catch_exec_command_1 (char *arg, int tempflag, int from_tty)
6060 char *cond_string = NULL;
6062 ep_skip_leading_whitespace (&arg);
6064 /* The allowed syntax is:
6066 catch exec if <cond>
6068 First, check if there's an if clause. */
6069 cond_string = ep_parse_optional_if_clause (&arg);
6071 if ((*arg != '\0') && !isspace (*arg))
6072 error ("Junk at end of arguments.");
6074 /* If this target supports it, create an exec catchpoint
6075 and enable reporting of such events. */
6076 create_exec_event_catchpoint (tempflag, cond_string);
6080 #if defined(SOLIB_ADD)
6082 catch_load_command_1 (char *arg, int tempflag, int from_tty)
6084 char *dll_pathname = NULL;
6085 char *cond_string = NULL;
6087 ep_skip_leading_whitespace (&arg);
6089 /* The allowed syntax is:
6091 catch load if <cond>
6092 catch load <filename>
6093 catch load <filename> if <cond>
6095 The user is not allowed to specify the <filename> after an
6098 We'll ignore the pathological case of a file named "if".
6100 First, check if there's an if clause. If so, then there
6101 cannot be a filename. */
6102 cond_string = ep_parse_optional_if_clause (&arg);
6104 /* If there was an if clause, then there cannot be a filename.
6105 Else, there might be a filename and an if clause. */
6106 if (cond_string == NULL)
6108 dll_pathname = ep_parse_optional_filename (&arg);
6109 ep_skip_leading_whitespace (&arg);
6110 cond_string = ep_parse_optional_if_clause (&arg);
6113 if ((*arg != '\0') && !isspace (*arg))
6114 error ("Junk at end of arguments.");
6116 /* Create a load breakpoint that only triggers when a load of
6117 the specified dll (or any dll, if no pathname was specified)
6119 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid), tempflag,
6120 dll_pathname, cond_string);
6124 catch_unload_command_1 (char *arg, int tempflag, int from_tty)
6126 char *dll_pathname = NULL;
6127 char *cond_string = NULL;
6129 ep_skip_leading_whitespace (&arg);
6131 /* The allowed syntax is:
6133 catch unload if <cond>
6134 catch unload <filename>
6135 catch unload <filename> if <cond>
6137 The user is not allowed to specify the <filename> after an
6140 We'll ignore the pathological case of a file named "if".
6142 First, check if there's an if clause. If so, then there
6143 cannot be a filename. */
6144 cond_string = ep_parse_optional_if_clause (&arg);
6146 /* If there was an if clause, then there cannot be a filename.
6147 Else, there might be a filename and an if clause. */
6148 if (cond_string == NULL)
6150 dll_pathname = ep_parse_optional_filename (&arg);
6151 ep_skip_leading_whitespace (&arg);
6152 cond_string = ep_parse_optional_if_clause (&arg);
6155 if ((*arg != '\0') && !isspace (*arg))
6156 error ("Junk at end of arguments.");
6158 /* Create an unload breakpoint that only triggers when an unload of
6159 the specified dll (or any dll, if no pathname was specified)
6161 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid), tempflag,
6162 dll_pathname, cond_string);
6164 #endif /* SOLIB_ADD */
6166 /* Commands to deal with catching exceptions. */
6168 /* Set a breakpoint at the specified callback routine for an
6169 exception event callback */
6172 create_exception_catchpoint (int tempflag, char *cond_string,
6173 enum exception_event_kind ex_event,
6174 struct symtab_and_line *sal)
6176 struct breakpoint *b;
6177 int thread = -1; /* All threads. */
6180 if (!sal) /* no exception support? */
6185 case EX_EVENT_THROW:
6186 bptype = bp_catch_throw;
6188 case EX_EVENT_CATCH:
6189 bptype = bp_catch_catch;
6191 default: /* error condition */
6192 error ("Internal error -- invalid catchpoint kind");
6195 b = set_raw_breakpoint (*sal, bptype);
6196 set_breakpoint_count (breakpoint_count + 1);
6197 b->number = breakpoint_count;
6199 b->cond_string = (cond_string == NULL) ?
6200 NULL : savestring (cond_string, strlen (cond_string));
6202 b->addr_string = NULL;
6203 b->enable = enabled;
6204 b->disposition = tempflag ? del : donttouch;
6208 /* Deal with "catch catch" and "catch throw" commands */
6211 catch_exception_command_1 (enum exception_event_kind ex_event, char *arg,
6212 int tempflag, int from_tty)
6214 char *cond_string = NULL;
6215 struct symtab_and_line *sal = NULL;
6217 ep_skip_leading_whitespace (&arg);
6219 cond_string = ep_parse_optional_if_clause (&arg);
6221 if ((*arg != '\0') && !isspace (*arg))
6222 error ("Junk at end of arguments.");
6224 if ((ex_event != EX_EVENT_THROW) &&
6225 (ex_event != EX_EVENT_CATCH))
6226 error ("Unsupported or unknown exception event; cannot catch it");
6228 /* See if we can find a callback routine */
6229 sal = target_enable_exception_callback (ex_event, 1);
6233 /* We have callbacks from the runtime system for exceptions.
6234 Set a breakpoint on the sal found, if no errors */
6235 if (sal != (struct symtab_and_line *) -1)
6236 create_exception_catchpoint (tempflag, cond_string, ex_event, sal);
6238 return; /* something went wrong with setting up callbacks */
6242 /* No callbacks from runtime system for exceptions.
6243 Try GNU C++ exception breakpoints using labels in debug info. */
6244 if (ex_event == EX_EVENT_CATCH)
6246 handle_gnu_4_16_catch_command (arg, tempflag, from_tty);
6248 else if (ex_event == EX_EVENT_THROW)
6250 /* Set a breakpoint on __raise_exception () */
6252 warning ("Unsupported with this platform/compiler combination.");
6253 warning ("Perhaps you can achieve the effect you want by setting");
6254 warning ("a breakpoint on __raise_exception().");
6259 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6260 inside a catch_errors */
6263 cover_target_enable_exception_callback (PTR arg)
6265 args_for_catchpoint_enable *args = arg;
6266 struct symtab_and_line *sal;
6267 sal = target_enable_exception_callback (args->kind, args->enable);
6270 else if (sal == (struct symtab_and_line *) -1)
6273 return 1; /*is valid */
6278 /* This is the original v.4.16 and earlier version of the
6279 catch_command_1() function. Now that other flavours of "catch"
6280 have been introduced, and since exception handling can be handled
6281 in other ways (through target ops) also, this is used only for the
6282 GNU C++ exception handling system.
6283 Note: Only the "catch" flavour of GDB 4.16 is handled here. The
6284 "catch NAME" is now no longer allowed in catch_command_1(). Also,
6285 there was no code in GDB 4.16 for "catch throw".
6287 Called from catch_exception_command_1 () */
6291 handle_gnu_4_16_catch_command (char *arg, int tempflag, int from_tty)
6293 /* First, translate ARG into something we can deal with in terms
6296 struct symtabs_and_lines sals;
6297 struct symtab_and_line sal;
6298 register struct expression *cond = 0;
6299 register struct breakpoint *b;
6303 INIT_SAL (&sal); /* initialize to zeroes */
6305 /* If no arg given, or if first arg is 'if ', all active catch clauses
6306 are breakpointed. */
6308 if (!arg || (arg[0] == 'i' && arg[1] == 'f'
6309 && (arg[2] == ' ' || arg[2] == '\t')))
6311 /* Grab all active catch clauses. */
6312 sals = get_catch_sals (0);
6316 /* Grab selected catch clauses. */
6317 error ("catch NAME not implemented");
6320 /* Not sure why this code has been disabled. I'm leaving
6321 it disabled. We can never come here now anyway
6322 since we don't allow the "catch NAME" syntax.
6325 /* This isn't used; I don't know what it was for. */
6326 sals = map_catch_names (arg, catch_breakpoint);
6334 for (i = 0; i < sals.nelts; i++)
6336 resolve_sal_pc (&sals.sals[i]);
6340 if (arg[0] == 'i' && arg[1] == 'f'
6341 && (arg[2] == ' ' || arg[2] == '\t'))
6342 cond = parse_exp_1 ((arg += 2, &arg),
6343 block_for_pc (sals.sals[i].pc), 0);
6345 error ("Junk at end of arguments.");
6350 for (i = 0; i < sals.nelts; i++)
6355 describe_other_breakpoints (sal.pc, sal.section);
6357 /* Important -- this is an ordinary breakpoint. For platforms
6358 with callback support for exceptions,
6359 create_exception_catchpoint() will create special bp types
6360 (bp_catch_catch and bp_catch_throw), and there is code in
6361 insert_breakpoints() and elsewhere that depends on that. */
6362 b = set_raw_breakpoint (sal, bp_breakpoint);
6363 set_breakpoint_count (breakpoint_count + 1);
6364 b->number = breakpoint_count;
6367 b->enable = enabled;
6368 b->disposition = tempflag ? del : donttouch;
6375 warning ("Multiple breakpoints were set.");
6376 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
6382 /* This creates a temporary internal breakpoint
6383 just to placate infrun */
6384 static struct breakpoint *
6385 create_temp_exception_breakpoint (CORE_ADDR pc)
6387 struct symtab_and_line sal;
6388 struct breakpoint *b;
6395 b = set_raw_breakpoint (sal, bp_breakpoint);
6397 b->disposition = del;
6398 b->enable = enabled;
6400 b->number = internal_breakpoint_number--;
6406 catch_command_1 (char *arg, int tempflag, int from_tty)
6409 /* The first argument may be an event name, such as "start" or "load".
6410 If so, then handle it as such. If it doesn't match an event name,
6411 then attempt to interpret it as an exception name. (This latter is
6412 the v4.16-and-earlier GDB meaning of the "catch" command.)
6414 First, try to find the bounds of what might be an event name. */
6415 char *arg1_start = arg;
6419 if (arg1_start == NULL)
6421 /* Old behaviour was to use pre-v-4.16 syntax */
6422 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6424 /* Now, this is not allowed */
6425 error ("Catch requires an event name.");
6428 arg1_end = ep_find_event_name_end (arg1_start);
6429 if (arg1_end == NULL)
6430 error ("catch requires an event");
6431 arg1_length = arg1_end + 1 - arg1_start;
6433 /* Try to match what we found against known event names. */
6434 if (strncmp (arg1_start, "signal", arg1_length) == 0)
6436 error ("Catch of signal not yet implemented");
6438 else if (strncmp (arg1_start, "catch", arg1_length) == 0)
6440 catch_exception_command_1 (EX_EVENT_CATCH, arg1_end + 1,
6441 tempflag, from_tty);
6443 else if (strncmp (arg1_start, "throw", arg1_length) == 0)
6445 catch_exception_command_1 (EX_EVENT_THROW, arg1_end + 1,
6446 tempflag, from_tty);
6448 else if (strncmp (arg1_start, "thread_start", arg1_length) == 0)
6450 error ("Catch of thread_start not yet implemented");
6452 else if (strncmp (arg1_start, "thread_exit", arg1_length) == 0)
6454 error ("Catch of thread_exit not yet implemented");
6456 else if (strncmp (arg1_start, "thread_join", arg1_length) == 0)
6458 error ("Catch of thread_join not yet implemented");
6460 else if (strncmp (arg1_start, "start", arg1_length) == 0)
6462 error ("Catch of start not yet implemented");
6464 else if (strncmp (arg1_start, "exit", arg1_length) == 0)
6466 error ("Catch of exit not yet implemented");
6468 else if (strncmp (arg1_start, "fork", arg1_length) == 0)
6470 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6471 catch_fork_command_1 (catch_fork, arg1_end + 1, tempflag, from_tty);
6473 error ("Catch of fork not yet implemented");
6476 else if (strncmp (arg1_start, "vfork", arg1_length) == 0)
6478 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6479 catch_fork_command_1 (catch_vfork, arg1_end + 1, tempflag, from_tty);
6481 error ("Catch of vfork not yet implemented");
6484 else if (strncmp (arg1_start, "exec", arg1_length) == 0)
6486 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6487 catch_exec_command_1 (arg1_end + 1, tempflag, from_tty);
6489 error ("Catch of exec not yet implemented");
6492 else if (strncmp (arg1_start, "load", arg1_length) == 0)
6494 #if defined(SOLIB_ADD)
6495 catch_load_command_1 (arg1_end + 1, tempflag, from_tty);
6497 error ("Catch of load not implemented");
6500 else if (strncmp (arg1_start, "unload", arg1_length) == 0)
6502 #if defined(SOLIB_ADD)
6503 catch_unload_command_1 (arg1_end + 1, tempflag, from_tty);
6505 error ("Catch of load not implemented");
6508 else if (strncmp (arg1_start, "stop", arg1_length) == 0)
6510 error ("Catch of stop not yet implemented");
6513 /* This doesn't appear to be an event name */
6517 /* Pre-v.4.16 behaviour was to treat the argument
6518 as the name of an exception */
6519 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6520 /* Now this is not allowed */
6521 error ("Unknown event kind specified for catch");
6526 /* Used by the gui, could be made a worker for other things. */
6529 set_breakpoint_sal (struct symtab_and_line sal)
6531 struct breakpoint *b;
6532 b = set_raw_breakpoint (sal, bp_breakpoint);
6533 set_breakpoint_count (breakpoint_count + 1);
6534 b->number = breakpoint_count;
6541 /* These aren't used; I don't know what they were for. */
6542 /* Disable breakpoints on all catch clauses described in ARGS. */
6544 disable_catch (char *args)
6546 /* Map the disable command to catch clauses described in ARGS. */
6549 /* Enable breakpoints on all catch clauses described in ARGS. */
6551 enable_catch (char *args)
6553 /* Map the disable command to catch clauses described in ARGS. */
6556 /* Delete breakpoints on all catch clauses in the active scope. */
6558 delete_catch (char *args)
6560 /* Map the delete command to catch clauses described in ARGS. */
6565 catch_command (char *arg, int from_tty)
6567 catch_command_1 (arg, 0, from_tty);
6572 tcatch_command (char *arg, int from_tty)
6574 catch_command_1 (arg, 1, from_tty);
6579 clear_command (char *arg, int from_tty)
6581 register struct breakpoint *b, *b1;
6583 struct symtabs_and_lines sals;
6584 struct symtab_and_line sal;
6585 register struct breakpoint *found;
6590 sals = decode_line_spec (arg, 1);
6595 sals.sals = (struct symtab_and_line *)
6596 xmalloc (sizeof (struct symtab_and_line));
6597 INIT_SAL (&sal); /* initialize to zeroes */
6598 sal.line = default_breakpoint_line;
6599 sal.symtab = default_breakpoint_symtab;
6600 sal.pc = default_breakpoint_address;
6601 if (sal.symtab == 0)
6602 error ("No source file specified.");
6610 /* For each line spec given, delete bps which correspond
6611 to it. We do this in two loops: the first loop looks at
6612 the initial bp(s) in the chain which should be deleted,
6613 the second goes down the rest of the chain looking ahead
6614 one so it can take those bps off the chain without messing
6618 for (i = 0; i < sals.nelts; i++)
6620 /* If exact pc given, clear bpts at that pc.
6621 If line given (pc == 0), clear all bpts on specified line.
6622 If defaulting, clear all bpts on default line
6625 defaulting sal.pc != 0 tests to do
6630 1 0 <can't happen> */
6633 found = (struct breakpoint *) 0;
6636 while (breakpoint_chain
6637 /* Why don't we check here that this is not
6638 a watchpoint, etc., as we do below?
6639 I can't make it fail, but don't know
6640 what's stopping the failure: a watchpoint
6641 of the same address as "sal.pc" should
6642 wind up being deleted. */
6644 && (((sal.pc && (breakpoint_chain->address == sal.pc)) &&
6645 (overlay_debugging == 0 ||
6646 breakpoint_chain->section == sal.section))
6647 || ((default_match || (0 == sal.pc))
6648 && breakpoint_chain->source_file != NULL
6649 && sal.symtab != NULL
6650 && STREQ (breakpoint_chain->source_file, sal.symtab->filename)
6651 && breakpoint_chain->line_number == sal.line)))
6654 b1 = breakpoint_chain;
6655 breakpoint_chain = b1->next;
6663 && b->next->type != bp_none
6664 && b->next->type != bp_watchpoint
6665 && b->next->type != bp_hardware_watchpoint
6666 && b->next->type != bp_read_watchpoint
6667 && b->next->type != bp_access_watchpoint
6668 && (((sal.pc && (b->next->address == sal.pc)) &&
6669 (overlay_debugging == 0 ||
6670 b->next->section == sal.section))
6671 || ((default_match || (0 == sal.pc))
6672 && b->next->source_file != NULL
6673 && sal.symtab != NULL
6674 && STREQ (b->next->source_file, sal.symtab->filename)
6675 && b->next->line_number == sal.line)))
6688 error ("No breakpoint at %s.", arg);
6690 error ("No breakpoint at this line.");
6694 from_tty = 1; /* Always report if deleted more than one */
6696 printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : "");
6697 breakpoints_changed ();
6701 printf_unfiltered ("%d ", found->number);
6703 delete_breakpoint (found);
6707 putchar_unfiltered ('\n');
6712 /* Delete breakpoint in BS if they are `delete' breakpoints and
6713 all breakpoints that are marked for deletion, whether hit or not.
6714 This is called after any breakpoint is hit, or after errors. */
6717 breakpoint_auto_delete (bpstat bs)
6719 struct breakpoint *b, *temp;
6721 for (; bs; bs = bs->next)
6722 if (bs->breakpoint_at && bs->breakpoint_at->disposition == del
6724 delete_breakpoint (bs->breakpoint_at);
6726 ALL_BREAKPOINTS_SAFE (b, temp)
6728 if (b->disposition == del_at_next_stop)
6729 delete_breakpoint (b);
6733 /* Delete a breakpoint and clean up all traces of it in the data
6737 delete_breakpoint (struct breakpoint *bpt)
6739 register struct breakpoint *b;
6743 error ("Internal error (attempted to delete a NULL breakpoint)");
6746 /* Has this bp already been deleted? This can happen because multiple
6747 lists can hold pointers to bp's. bpstat lists are especial culprits.
6749 One example of this happening is a watchpoint's scope bp. When the
6750 scope bp triggers, we notice that the watchpoint is out of scope, and
6751 delete it. We also delete its scope bp. But the scope bp is marked
6752 "auto-deleting", and is already on a bpstat. That bpstat is then
6753 checked for auto-deleting bp's, which are deleted.
6755 A real solution to this problem might involve reference counts in bp's,
6756 and/or giving them pointers back to their referencing bpstat's, and
6757 teaching delete_breakpoint to only free a bp's storage when no more
6758 references were extent. A cheaper bandaid was chosen. */
6759 if (bpt->type == bp_none)
6762 if (delete_breakpoint_hook)
6763 delete_breakpoint_hook (bpt);
6764 breakpoint_delete_event (bpt->number);
6767 remove_breakpoint (bpt, mark_inserted);
6769 if (breakpoint_chain == bpt)
6770 breakpoint_chain = bpt->next;
6772 /* If we have callback-style exception catchpoints, don't go through
6773 the adjustments to the C++ runtime library etc. if the inferior
6774 isn't actually running. target_enable_exception_callback for a
6775 null target ops vector gives an undesirable error message, so we
6776 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6777 exceptions are supported in this way, it's OK for now. FIXME */
6778 if (ep_is_exception_catchpoint (bpt) && target_has_execution)
6780 static char message1[] = "Error in deleting catchpoint %d:\n";
6781 static char message[sizeof (message1) + 30];
6782 args_for_catchpoint_enable args;
6784 /* Format possible error msg */
6785 sprintf (message, message1, bpt->number);
6786 args.kind = bpt->type == bp_catch_catch ?
6787 EX_EVENT_CATCH : EX_EVENT_THROW;
6789 catch_errors (cover_target_enable_exception_callback, &args,
6790 message, RETURN_MASK_ALL);
6797 b->next = bpt->next;
6801 /* Before turning off the visuals for the bp, check to see that
6802 there are no other bps at the same address. */
6809 clearIt = (b->address != bpt->address);
6816 TUIDO (((TuiOpaqueFuncPtr) tui_vAllSetHasBreakAt, bpt, 0));
6817 TUIDO (((TuiOpaqueFuncPtr) tuiUpdateAllExecInfos));
6821 check_duplicates (bpt);
6822 /* If this breakpoint was inserted, and there is another breakpoint
6823 at the same address, we need to insert the other breakpoint. */
6825 && bpt->type != bp_hardware_watchpoint
6826 && bpt->type != bp_read_watchpoint
6827 && bpt->type != bp_access_watchpoint
6828 && bpt->type != bp_catch_fork
6829 && bpt->type != bp_catch_vfork
6830 && bpt->type != bp_catch_exec)
6833 if (b->address == bpt->address
6834 && b->section == bpt->section
6836 && b->enable != disabled
6837 && b->enable != shlib_disabled
6838 && b->enable != call_disabled)
6842 /* We should never reach this point if there is a permanent
6843 breakpoint at the same address as the one being deleted.
6844 If there is a permanent breakpoint somewhere, it should
6845 always be the only one inserted. */
6846 if (b->enable == permanent)
6847 internal_error (__FILE__, __LINE__,
6848 "another breakpoint was inserted on top of "
6849 "a permanent breakpoint");
6851 if (b->type == bp_hardware_breakpoint)
6852 val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
6854 val = target_insert_breakpoint (b->address, b->shadow_contents);
6858 target_terminal_ours_for_output ();
6859 warning ("Cannot insert breakpoint %d:", b->number);
6860 memory_error (val, b->address); /* which bombs us out */
6867 free_command_lines (&bpt->commands);
6870 if (bpt->cond_string != NULL)
6871 xfree (bpt->cond_string);
6872 if (bpt->addr_string != NULL)
6873 xfree (bpt->addr_string);
6874 if (bpt->exp != NULL)
6876 if (bpt->exp_string != NULL)
6877 xfree (bpt->exp_string);
6878 if (bpt->val != NULL)
6879 value_free (bpt->val);
6880 if (bpt->source_file != NULL)
6881 xfree (bpt->source_file);
6882 if (bpt->dll_pathname != NULL)
6883 xfree (bpt->dll_pathname);
6884 if (bpt->triggered_dll_pathname != NULL)
6885 xfree (bpt->triggered_dll_pathname);
6886 if (bpt->exec_pathname != NULL)
6887 xfree (bpt->exec_pathname);
6889 /* Be sure no bpstat's are pointing at it after it's been freed. */
6890 /* FIXME, how can we find all bpstat's?
6891 We just check stop_bpstat for now. */
6892 for (bs = stop_bpstat; bs; bs = bs->next)
6893 if (bs->breakpoint_at == bpt)
6895 bs->breakpoint_at = NULL;
6897 /* we'd call bpstat_clear_actions, but that free's stuff and due
6898 to the multiple pointers pointing to one item with no
6899 reference counts found anywhere through out the bpstat's (how
6900 do you spell fragile?), we don't want to free things twice --
6901 better a memory leak than a corrupt malloc pool! */
6902 bs->commands = NULL;
6905 /* On the chance that someone will soon try again to delete this same
6906 bp, we mark it as deleted before freeing its storage. */
6907 bpt->type = bp_none;
6913 do_delete_breakpoint_cleanup (void *b)
6915 delete_breakpoint (b);
6919 make_cleanup_delete_breakpoint (struct breakpoint *b)
6921 return make_cleanup (do_delete_breakpoint_cleanup, b);
6925 make_exec_cleanup_delete_breakpoint (struct breakpoint *b)
6927 return make_exec_cleanup (do_delete_breakpoint_cleanup, b);
6931 delete_command (char *arg, int from_tty)
6933 struct breakpoint *b, *temp;
6937 int breaks_to_delete = 0;
6939 /* Delete all breakpoints if no argument.
6940 Do not delete internal or call-dummy breakpoints, these
6941 have to be deleted with an explicit breakpoint number argument. */
6944 if (b->type != bp_call_dummy &&
6945 b->type != bp_shlib_event &&
6946 b->type != bp_thread_event &&
6948 breaks_to_delete = 1;
6951 /* Ask user only if there are some breakpoints to delete. */
6953 || (breaks_to_delete && query ("Delete all breakpoints? ")))
6955 ALL_BREAKPOINTS_SAFE (b, temp)
6957 if (b->type != bp_call_dummy &&
6958 b->type != bp_shlib_event &&
6959 b->type != bp_thread_event &&
6961 delete_breakpoint (b);
6966 map_breakpoint_numbers (arg, delete_breakpoint);
6969 /* Reset a breakpoint given it's struct breakpoint * BINT.
6970 The value we return ends up being the return value from catch_errors.
6971 Unused in this case. */
6974 breakpoint_re_set_one (PTR bint)
6976 /* get past catch_errs */
6977 struct breakpoint *b = (struct breakpoint *) bint;
6980 struct symtabs_and_lines sals;
6982 enum enable save_enable;
6987 warning ("attempted to reset apparently deleted breakpoint #%d?",
6991 case bp_hardware_breakpoint:
6993 case bp_catch_unload:
6994 if (b->addr_string == NULL)
6996 /* Anything without a string can't be re-set. */
6997 delete_breakpoint (b);
7000 /* In case we have a problem, disable this breakpoint. We'll restore
7001 its status if we succeed. */
7002 save_enable = b->enable;
7003 b->enable = disabled;
7005 set_language (b->language);
7006 input_radix = b->input_radix;
7008 sals = decode_line_1 (&s, 1, (struct symtab *) NULL, 0, (char ***) NULL);
7009 for (i = 0; i < sals.nelts; i++)
7011 resolve_sal_pc (&sals.sals[i]);
7013 /* Reparse conditions, they might contain references to the
7015 if (b->cond_string != NULL)
7020 b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0);
7023 /* We need to re-set the breakpoint if the address changes... */
7024 if (b->address != sals.sals[i].pc
7025 /* ...or new and old breakpoints both have source files, and
7026 the source file name or the line number changes... */
7027 || (b->source_file != NULL
7028 && sals.sals[i].symtab != NULL
7029 && (!STREQ (b->source_file, sals.sals[i].symtab->filename)
7030 || b->line_number != sals.sals[i].line)
7032 /* ...or we switch between having a source file and not having
7034 || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL))
7037 if (b->source_file != NULL)
7038 xfree (b->source_file);
7039 if (sals.sals[i].symtab == NULL)
7040 b->source_file = NULL;
7043 savestring (sals.sals[i].symtab->filename,
7044 strlen (sals.sals[i].symtab->filename));
7045 b->line_number = sals.sals[i].line;
7046 b->address = sals.sals[i].pc;
7048 /* Used to check for duplicates here, but that can
7049 cause trouble, as it doesn't check for disable
7054 /* Might be better to do this just once per breakpoint_re_set,
7055 rather than once for every breakpoint. */
7056 breakpoints_changed ();
7058 b->section = sals.sals[i].section;
7059 b->enable = save_enable; /* Restore it, this worked. */
7062 /* Now that this is re-enabled, check_duplicates
7064 check_duplicates (b);
7071 case bp_hardware_watchpoint:
7072 case bp_read_watchpoint:
7073 case bp_access_watchpoint:
7074 innermost_block = NULL;
7075 /* The issue arises of what context to evaluate this in. The
7076 same one as when it was set, but what does that mean when
7077 symbols have been re-read? We could save the filename and
7078 functionname, but if the context is more local than that, the
7079 best we could do would be something like how many levels deep
7080 and which index at that particular level, but that's going to
7081 be less stable than filenames or function names. */
7083 /* So for now, just use a global context. */
7086 b->exp = parse_expression (b->exp_string);
7087 b->exp_valid_block = innermost_block;
7088 mark = value_mark ();
7090 value_free (b->val);
7091 b->val = evaluate_expression (b->exp);
7092 release_value (b->val);
7093 if (VALUE_LAZY (b->val))
7094 value_fetch_lazy (b->val);
7096 if (b->cond_string != NULL)
7101 b->cond = parse_exp_1 (&s, (struct block *) 0, 0);
7103 if (b->enable == enabled)
7105 value_free_to_mark (mark);
7107 case bp_catch_catch:
7108 case bp_catch_throw:
7110 /* We needn't really do anything to reset these, since the mask
7111 that requests them is unaffected by e.g., new libraries being
7114 case bp_catch_vfork:
7119 printf_filtered ("Deleting unknown breakpoint type %d\n", b->type);
7121 /* Delete longjmp breakpoints, they will be reset later by
7122 breakpoint_re_set. */
7124 case bp_longjmp_resume:
7125 delete_breakpoint (b);
7128 /* This breakpoint is special, it's set up when the inferior
7129 starts and we really don't want to touch it. */
7130 case bp_shlib_event:
7132 /* Like bp_shlib_event, this breakpoint type is special.
7133 Once it is set up, we do not want to touch it. */
7134 case bp_thread_event:
7136 /* Keep temporary breakpoints, which can be encountered when we step
7137 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7138 Otherwise these should have been blown away via the cleanup chain
7139 or by breakpoint_init_inferior when we rerun the executable. */
7142 case bp_watchpoint_scope:
7144 case bp_step_resume:
7151 /* Re-set all breakpoints after symbols have been re-loaded. */
7153 breakpoint_re_set (void)
7155 struct breakpoint *b, *temp;
7156 enum language save_language;
7157 int save_input_radix;
7158 static char message1[] = "Error in re-setting breakpoint %d:\n";
7159 char message[sizeof (message1) + 30 /* slop */ ];
7161 save_language = current_language->la_language;
7162 save_input_radix = input_radix;
7163 ALL_BREAKPOINTS_SAFE (b, temp)
7165 /* Format possible error msg */
7166 sprintf (message, message1, b->number);
7167 catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL);
7169 set_language (save_language);
7170 input_radix = save_input_radix;
7172 #ifdef GET_LONGJMP_TARGET
7173 create_longjmp_breakpoint ("longjmp");
7174 create_longjmp_breakpoint ("_longjmp");
7175 create_longjmp_breakpoint ("siglongjmp");
7176 create_longjmp_breakpoint ("_siglongjmp");
7177 create_longjmp_breakpoint (NULL);
7181 /* Took this out (temporarily at least), since it produces an extra
7182 blank line at startup. This messes up the gdbtests. -PB */
7183 /* Blank line to finish off all those mention() messages we just printed. */
7184 printf_filtered ("\n");
7188 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7189 If from_tty is nonzero, it prints a message to that effect,
7190 which ends with a period (no newline). */
7192 /* Reset the thread number of this breakpoint:
7194 - If the breakpoint is for all threads, leave it as-is.
7195 - Else, reset it to the current thread for inferior_ptid. */
7197 breakpoint_re_set_thread (struct breakpoint *b)
7199 if (b->thread != -1)
7201 if (in_thread_list (inferior_ptid))
7202 b->thread = pid_to_thread_id (inferior_ptid);
7207 set_ignore_count (int bptnum, int count, int from_tty)
7209 register struct breakpoint *b;
7215 if (b->number == bptnum)
7217 b->ignore_count = count;
7220 else if (count == 0)
7221 printf_filtered ("Will stop next time breakpoint %d is reached.",
7223 else if (count == 1)
7224 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7227 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7229 breakpoints_changed ();
7233 error ("No breakpoint number %d.", bptnum);
7236 /* Clear the ignore counts of all breakpoints. */
7238 breakpoint_clear_ignore_counts (void)
7240 struct breakpoint *b;
7243 b->ignore_count = 0;
7246 /* Command to set ignore-count of breakpoint N to COUNT. */
7249 ignore_command (char *args, int from_tty)
7255 error_no_arg ("a breakpoint number");
7257 num = get_number (&p);
7259 error ("bad breakpoint number: '%s'", args);
7261 error ("Second argument (specified ignore-count) is missing.");
7263 set_ignore_count (num,
7264 longest_to_int (value_as_long (parse_and_eval (p))),
7266 printf_filtered ("\n");
7267 breakpoints_changed ();
7270 /* Call FUNCTION on each of the breakpoints
7271 whose numbers are given in ARGS. */
7274 map_breakpoint_numbers (char *args, void (*function) (struct breakpoint *))
7276 register char *p = args;
7279 register struct breakpoint *b, *tmp;
7283 error_no_arg ("one or more breakpoint numbers");
7290 num = get_number_or_range (&p1);
7293 warning ("bad breakpoint number at or near '%s'", p);
7297 ALL_BREAKPOINTS_SAFE (b, tmp)
7298 if (b->number == num)
7300 struct breakpoint *related_breakpoint = b->related_breakpoint;
7303 if (related_breakpoint)
7304 function (related_breakpoint);
7308 printf_unfiltered ("No breakpoint number %d.\n", num);
7315 disable_breakpoint (struct breakpoint *bpt)
7317 /* Never disable a watchpoint scope breakpoint; we want to
7318 hit them when we leave scope so we can delete both the
7319 watchpoint and its scope breakpoint at that time. */
7320 if (bpt->type == bp_watchpoint_scope)
7323 /* You can't disable permanent breakpoints. */
7324 if (bpt->enable == permanent)
7327 bpt->enable = disabled;
7329 check_duplicates (bpt);
7331 if (modify_breakpoint_hook)
7332 modify_breakpoint_hook (bpt);
7333 breakpoint_modify_event (bpt->number);
7338 disable_command (char *args, int from_tty)
7340 register struct breakpoint *bpt;
7342 ALL_BREAKPOINTS (bpt)
7346 warning ("attempted to disable apparently deleted breakpoint #%d?",
7351 case bp_catch_unload:
7353 case bp_catch_vfork:
7355 case bp_catch_catch:
7356 case bp_catch_throw:
7357 case bp_hardware_breakpoint:
7359 case bp_hardware_watchpoint:
7360 case bp_read_watchpoint:
7361 case bp_access_watchpoint:
7362 disable_breakpoint (bpt);
7367 map_breakpoint_numbers (args, disable_breakpoint);
7371 do_enable_breakpoint (struct breakpoint *bpt, enum bpdisp disposition)
7373 struct frame_info *save_selected_frame = NULL;
7374 int save_selected_frame_level = -1;
7375 int target_resources_ok, other_type_used;
7378 if (bpt->type == bp_hardware_breakpoint)
7381 i = hw_breakpoint_used_count ();
7382 target_resources_ok =
7383 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,
7385 if (target_resources_ok == 0)
7386 error ("No hardware breakpoint support in the target.");
7387 else if (target_resources_ok < 0)
7388 error ("Hardware breakpoints used exceeds limit.");
7391 if (bpt->enable != permanent)
7392 bpt->enable = enabled;
7393 bpt->disposition = disposition;
7394 check_duplicates (bpt);
7395 breakpoints_changed ();
7397 if (bpt->type == bp_watchpoint ||
7398 bpt->type == bp_hardware_watchpoint ||
7399 bpt->type == bp_read_watchpoint ||
7400 bpt->type == bp_access_watchpoint)
7402 if (bpt->exp_valid_block != NULL)
7404 struct frame_info *fr =
7406 /* Ensure that we have the current frame. Else, this
7407 next query may pessimistically be answered as, "No,
7408 not within current scope". */
7409 get_current_frame ();
7410 fr = find_frame_addr_in_frame_chain (bpt->watchpoint_frame);
7414 Cannot enable watchpoint %d because the block in which its expression\n\
7415 is valid is not currently in scope.\n", bpt->number);
7416 bpt->enable = disabled;
7420 save_selected_frame = selected_frame;
7421 save_selected_frame_level = selected_frame_level;
7422 select_frame (fr, -1);
7425 value_free (bpt->val);
7426 mark = value_mark ();
7427 bpt->val = evaluate_expression (bpt->exp);
7428 release_value (bpt->val);
7429 if (VALUE_LAZY (bpt->val))
7430 value_fetch_lazy (bpt->val);
7432 if (bpt->type == bp_hardware_watchpoint ||
7433 bpt->type == bp_read_watchpoint ||
7434 bpt->type == bp_access_watchpoint)
7436 int i = hw_watchpoint_used_count (bpt->type, &other_type_used);
7437 int mem_cnt = can_use_hardware_watchpoint (bpt->val);
7439 /* Hack around 'unused var' error for some targets here */
7441 target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7442 bpt->type, i + mem_cnt, other_type_used);
7443 /* we can consider of type is bp_hardware_watchpoint, convert to
7444 bp_watchpoint in the following condition */
7445 if (target_resources_ok < 0)
7448 Cannot enable watchpoint %d because target watch resources\n\
7449 have been allocated for other watchpoints.\n", bpt->number);
7450 bpt->enable = disabled;
7451 value_free_to_mark (mark);
7456 if (save_selected_frame_level >= 0)
7457 select_frame (save_selected_frame, save_selected_frame_level);
7458 value_free_to_mark (mark);
7460 if (modify_breakpoint_hook)
7461 modify_breakpoint_hook (bpt);
7462 breakpoint_modify_event (bpt->number);
7466 enable_breakpoint (struct breakpoint *bpt)
7468 do_enable_breakpoint (bpt, bpt->disposition);
7471 /* The enable command enables the specified breakpoints (or all defined
7472 breakpoints) so they once again become (or continue to be) effective
7473 in stopping the inferior. */
7477 enable_command (char *args, int from_tty)
7479 register struct breakpoint *bpt;
7481 ALL_BREAKPOINTS (bpt)
7485 warning ("attempted to enable apparently deleted breakpoint #%d?",
7490 case bp_catch_unload:
7492 case bp_catch_vfork:
7494 case bp_catch_catch:
7495 case bp_catch_throw:
7496 case bp_hardware_breakpoint:
7498 case bp_hardware_watchpoint:
7499 case bp_read_watchpoint:
7500 case bp_access_watchpoint:
7501 enable_breakpoint (bpt);
7506 map_breakpoint_numbers (args, enable_breakpoint);
7510 enable_once_breakpoint (struct breakpoint *bpt)
7512 do_enable_breakpoint (bpt, disable);
7517 enable_once_command (char *args, int from_tty)
7519 map_breakpoint_numbers (args, enable_once_breakpoint);
7523 enable_delete_breakpoint (struct breakpoint *bpt)
7525 do_enable_breakpoint (bpt, del);
7530 enable_delete_command (char *args, int from_tty)
7532 map_breakpoint_numbers (args, enable_delete_breakpoint);
7535 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7537 struct symtabs_and_lines
7538 decode_line_spec_1 (char *string, int funfirstline)
7540 struct symtabs_and_lines sals;
7542 error ("Empty line specification.");
7543 if (default_breakpoint_valid)
7544 sals = decode_line_1 (&string, funfirstline,
7545 default_breakpoint_symtab,
7546 default_breakpoint_line,
7549 sals = decode_line_1 (&string, funfirstline,
7550 (struct symtab *) NULL, 0, (char ***) NULL);
7552 error ("Junk at end of line specification: %s", string);
7557 _initialize_breakpoint (void)
7559 struct cmd_list_element *c;
7561 breakpoint_chain = 0;
7562 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7563 before a breakpoint is set. */
7564 breakpoint_count = 0;
7566 add_com ("ignore", class_breakpoint, ignore_command,
7567 "Set ignore-count of breakpoint number N to COUNT.\n\
7568 Usage is `ignore N COUNT'.");
7570 add_com_alias ("bc", "ignore", class_breakpoint, 1);
7572 add_com ("commands", class_breakpoint, commands_command,
7573 "Set commands to be executed when a breakpoint is hit.\n\
7574 Give breakpoint number as argument after \"commands\".\n\
7575 With no argument, the targeted breakpoint is the last one set.\n\
7576 The commands themselves follow starting on the next line.\n\
7577 Type a line containing \"end\" to indicate the end of them.\n\
7578 Give \"silent\" as the first line to make the breakpoint silent;\n\
7579 then no output is printed when it is hit, except what the commands print.");
7581 add_com ("condition", class_breakpoint, condition_command,
7582 "Specify breakpoint number N to break only if COND is true.\n\
7583 Usage is `condition N COND', where N is an integer and COND is an\n\
7584 expression to be evaluated whenever breakpoint N is reached. ");
7586 c = add_com ("tbreak", class_breakpoint, tbreak_command,
7587 "Set a temporary breakpoint. Args like \"break\" command.\n\
7588 Like \"break\" except the breakpoint is only temporary,\n\
7589 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7590 by using \"enable delete\" on the breakpoint number.");
7591 c->completer = location_completer;
7593 c = add_com ("txbreak", class_breakpoint, tbreak_at_finish_command,
7594 "Set temporary breakpoint at procedure exit. Either there should\n\
7595 be no argument or the argument must be a depth.\n");
7596 c->completer = location_completer;
7598 c = add_com ("hbreak", class_breakpoint, hbreak_command,
7599 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7600 Like \"break\" except the breakpoint requires hardware support,\n\
7601 some target hardware may not have this support.");
7602 c->completer = location_completer;
7604 c = add_com ("thbreak", class_breakpoint, thbreak_command,
7605 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7606 Like \"hbreak\" except the breakpoint is only temporary,\n\
7607 so it will be deleted when hit.");
7608 c->completer = location_completer;
7610 add_prefix_cmd ("enable", class_breakpoint, enable_command,
7611 "Enable some breakpoints.\n\
7612 Give breakpoint numbers (separated by spaces) as arguments.\n\
7613 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7614 This is used to cancel the effect of the \"disable\" command.\n\
7615 With a subcommand you can enable temporarily.",
7616 &enablelist, "enable ", 1, &cmdlist);
7618 add_com ("ab", class_breakpoint, enable_command,
7619 "Enable some breakpoints.\n\
7620 Give breakpoint numbers (separated by spaces) as arguments.\n\
7621 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7622 This is used to cancel the effect of the \"disable\" command.\n\
7623 With a subcommand you can enable temporarily.");
7625 add_com_alias ("en", "enable", class_breakpoint, 1);
7627 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command,
7628 "Enable some breakpoints.\n\
7629 Give breakpoint numbers (separated by spaces) as arguments.\n\
7630 This is used to cancel the effect of the \"disable\" command.\n\
7631 May be abbreviated to simply \"enable\".\n",
7632 &enablebreaklist, "enable breakpoints ", 1, &enablelist);
7634 add_cmd ("once", no_class, enable_once_command,
7635 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7636 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7639 add_cmd ("delete", no_class, enable_delete_command,
7640 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7641 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7644 add_cmd ("delete", no_class, enable_delete_command,
7645 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7646 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7649 add_cmd ("once", no_class, enable_once_command,
7650 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7651 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7654 add_prefix_cmd ("disable", class_breakpoint, disable_command,
7655 "Disable some breakpoints.\n\
7656 Arguments are breakpoint numbers with spaces in between.\n\
7657 To disable all breakpoints, give no argument.\n\
7658 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7659 &disablelist, "disable ", 1, &cmdlist);
7660 add_com_alias ("dis", "disable", class_breakpoint, 1);
7661 add_com_alias ("disa", "disable", class_breakpoint, 1);
7663 add_com ("sb", class_breakpoint, disable_command,
7664 "Disable some breakpoints.\n\
7665 Arguments are breakpoint numbers with spaces in between.\n\
7666 To disable all breakpoints, give no argument.\n\
7667 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7669 add_cmd ("breakpoints", class_alias, disable_command,
7670 "Disable some breakpoints.\n\
7671 Arguments are breakpoint numbers with spaces in between.\n\
7672 To disable all breakpoints, give no argument.\n\
7673 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7674 This command may be abbreviated \"disable\".",
7677 add_prefix_cmd ("delete", class_breakpoint, delete_command,
7678 "Delete some breakpoints or auto-display expressions.\n\
7679 Arguments are breakpoint numbers with spaces in between.\n\
7680 To delete all breakpoints, give no argument.\n\
7682 Also a prefix command for deletion of other GDB objects.\n\
7683 The \"unset\" command is also an alias for \"delete\".",
7684 &deletelist, "delete ", 1, &cmdlist);
7685 add_com_alias ("d", "delete", class_breakpoint, 1);
7687 add_com ("db", class_breakpoint, delete_command,
7688 "Delete some breakpoints.\n\
7689 Arguments are breakpoint numbers with spaces in between.\n\
7690 To delete all breakpoints, give no argument.\n");
7692 add_cmd ("breakpoints", class_alias, delete_command,
7693 "Delete some breakpoints or auto-display expressions.\n\
7694 Arguments are breakpoint numbers with spaces in between.\n\
7695 To delete all breakpoints, give no argument.\n\
7696 This command may be abbreviated \"delete\".",
7699 add_com ("clear", class_breakpoint, clear_command,
7700 concat ("Clear breakpoint at specified line or function.\n\
7701 Argument may be line number, function name, or \"*\" and an address.\n\
7702 If line number is specified, all breakpoints in that line are cleared.\n\
7703 If function is specified, breakpoints at beginning of function are cleared.\n\
7704 If an address is specified, breakpoints at that address are cleared.\n\n",
7705 "With no argument, clears all breakpoints in the line that the selected frame\n\
7708 See also the \"delete\" command which clears breakpoints by number.", NULL));
7710 c = add_com ("break", class_breakpoint, break_command,
7711 concat ("Set breakpoint at specified line or function.\n\
7712 Argument may be line number, function name, or \"*\" and an address.\n\
7713 If line number is specified, break at start of code for that line.\n\
7714 If function is specified, break at start of code for that function.\n\
7715 If an address is specified, break at that exact address.\n",
7716 "With no arg, uses current execution address of selected stack frame.\n\
7717 This is useful for breaking on return to a stack frame.\n\
7719 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7721 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL));
7722 c->completer = location_completer;
7724 add_com_alias ("b", "break", class_run, 1);
7725 add_com_alias ("br", "break", class_run, 1);
7726 add_com_alias ("bre", "break", class_run, 1);
7727 add_com_alias ("brea", "break", class_run, 1);
7729 add_com ("xbreak", class_breakpoint, break_at_finish_command,
7730 concat ("Set breakpoint at procedure exit. \n\
7731 Argument may be function name, or \"*\" and an address.\n\
7732 If function is specified, break at end of code for that function.\n\
7733 If an address is specified, break at the end of the function that contains \n\
7734 that exact address.\n",
7735 "With no arg, uses current execution address of selected stack frame.\n\
7736 This is useful for breaking on return to a stack frame.\n\
7738 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7740 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL));
7741 add_com_alias ("xb", "xbreak", class_breakpoint, 1);
7742 add_com_alias ("xbr", "xbreak", class_breakpoint, 1);
7743 add_com_alias ("xbre", "xbreak", class_breakpoint, 1);
7744 add_com_alias ("xbrea", "xbreak", class_breakpoint, 1);
7748 add_com_alias ("ba", "break", class_breakpoint, 1);
7749 add_com_alias ("bu", "ubreak", class_breakpoint, 1);
7750 add_com ("bx", class_breakpoint, break_at_finish_at_depth_command,
7751 "Set breakpoint at procedure exit. Either there should\n\
7752 be no argument or the argument must be a depth.\n");
7757 add_abbrev_prefix_cmd ("stop", class_breakpoint, stop_command,
7758 "Break in function/address or break at a line in the current file.",
7759 &stoplist, "stop ", 1, &cmdlist);
7760 add_cmd ("in", class_breakpoint, stopin_command,
7761 "Break in function or address.\n", &stoplist);
7762 add_cmd ("at", class_breakpoint, stopat_command,
7763 "Break at a line in the current file.\n", &stoplist);
7764 add_com ("status", class_info, breakpoints_info,
7765 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7766 The \"Type\" column indicates one of:\n\
7767 \tbreakpoint - normal breakpoint\n\
7768 \twatchpoint - watchpoint\n\
7769 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7770 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7771 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7772 address and file/line number respectively.\n\n",
7773 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7774 are set to the address of the last breakpoint listed.\n\n\
7775 Convenience variable \"$bpnum\" contains the number of the last\n\
7776 breakpoint set.", NULL));
7779 add_info ("breakpoints", breakpoints_info,
7780 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7781 The \"Type\" column indicates one of:\n\
7782 \tbreakpoint - normal breakpoint\n\
7783 \twatchpoint - watchpoint\n\
7784 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7785 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7786 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7787 address and file/line number respectively.\n\n",
7788 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7789 are set to the address of the last breakpoint listed.\n\n\
7790 Convenience variable \"$bpnum\" contains the number of the last\n\
7791 breakpoint set.", NULL));
7794 add_com ("lb", class_breakpoint, breakpoints_info,
7795 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7796 The \"Type\" column indicates one of:\n\
7797 \tbreakpoint - normal breakpoint\n\
7798 \twatchpoint - watchpoint\n\
7799 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7800 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7801 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7802 address and file/line number respectively.\n\n",
7803 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7804 are set to the address of the last breakpoint listed.\n\n\
7805 Convenience variable \"$bpnum\" contains the number of the last\n\
7806 breakpoint set.", NULL));
7808 add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints,
7809 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7810 The \"Type\" column indicates one of:\n\
7811 \tbreakpoint - normal breakpoint\n\
7812 \twatchpoint - watchpoint\n\
7813 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7814 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7815 \tuntil - internal breakpoint used by the \"until\" command\n\
7816 \tfinish - internal breakpoint used by the \"finish\" command\n",
7817 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7818 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7819 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7820 address and file/line number respectively.\n\n",
7821 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7822 are set to the address of the last breakpoint listed.\n\n\
7823 Convenience variable \"$bpnum\" contains the number of the last\n\
7824 breakpoint set.", NULL),
7825 &maintenanceinfolist);
7827 add_com ("catch", class_breakpoint, catch_command,
7828 "Set catchpoints to catch events.\n\
7829 Raised signals may be caught:\n\
7830 \tcatch signal - all signals\n\
7831 \tcatch signal <signame> - a particular signal\n\
7832 Raised exceptions may be caught:\n\
7833 \tcatch throw - all exceptions, when thrown\n\
7834 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7835 \tcatch catch - all exceptions, when caught\n\
7836 \tcatch catch <exceptname> - a particular exception, when caught\n\
7837 Thread or process events may be caught:\n\
7838 \tcatch thread_start - any threads, just after creation\n\
7839 \tcatch thread_exit - any threads, just before expiration\n\
7840 \tcatch thread_join - any threads, just after joins\n\
7841 Process events may be caught:\n\
7842 \tcatch start - any processes, just after creation\n\
7843 \tcatch exit - any processes, just before expiration\n\
7844 \tcatch fork - calls to fork()\n\
7845 \tcatch vfork - calls to vfork()\n\
7846 \tcatch exec - calls to exec()\n\
7847 Dynamically-linked library events may be caught:\n\
7848 \tcatch load - loads of any library\n\
7849 \tcatch load <libname> - loads of a particular library\n\
7850 \tcatch unload - unloads of any library\n\
7851 \tcatch unload <libname> - unloads of a particular library\n\
7852 The act of your program's execution stopping may also be caught:\n\
7854 C++ exceptions may be caught:\n\
7855 \tcatch throw - all exceptions, when thrown\n\
7856 \tcatch catch - all exceptions, when caught\n\
7858 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7859 after a fork or vfork is caught.\n\n\
7860 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7862 add_com ("tcatch", class_breakpoint, tcatch_command,
7863 "Set temporary catchpoints to catch events.\n\
7864 Args like \"catch\" command.\n\
7865 Like \"catch\" except the catchpoint is only temporary,\n\
7866 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7867 by using \"enable delete\" on the catchpoint number.");
7869 c = add_com ("watch", class_breakpoint, watch_command,
7870 "Set a watchpoint for an expression.\n\
7871 A watchpoint stops execution of your program whenever the value of\n\
7872 an expression changes.");
7873 c->completer = location_completer;
7875 c = add_com ("rwatch", class_breakpoint, rwatch_command,
7876 "Set a read watchpoint for an expression.\n\
7877 A watchpoint stops execution of your program whenever the value of\n\
7878 an expression is read.");
7879 c->completer = location_completer;
7881 c = add_com ("awatch", class_breakpoint, awatch_command,
7882 "Set a watchpoint for an expression.\n\
7883 A watchpoint stops execution of your program whenever the value of\n\
7884 an expression is either read or written.");
7885 c->completer = location_completer;
7887 add_info ("watchpoints", breakpoints_info,
7888 "Synonym for ``info breakpoints''.");
7891 c = add_set_cmd ("can-use-hw-watchpoints", class_support, var_zinteger,
7892 (char *) &can_use_hw_watchpoints,
7893 "Set debugger's willingness to use watchpoint hardware.\n\
7894 If zero, gdb will not use hardware for new watchpoints, even if\n\
7895 such is available. (However, any hardware watchpoints that were\n\
7896 created before setting this to nonzero, will continue to use watchpoint\n\
7899 add_show_from_set (c, &showlist);
7901 can_use_hw_watchpoints = 1;