6620 lines
187 KiB
C
6620 lines
187 KiB
C
/* Everything about breakpoints, for GDB.
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Copyright 1986, 87, 89, 90, 91, 92, 93, 94, 95, 96, 97, 1998
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include <ctype.h>
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#include "symtab.h"
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#include "frame.h"
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#include "breakpoint.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "gdbcore.h"
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#include "gdbcmd.h"
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#include "value.h"
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#include "command.h"
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#include "inferior.h"
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#include "gdbthread.h"
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#include "target.h"
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#include "language.h"
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#include "gdb_string.h"
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#include "demangle.h"
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#include "annotate.h"
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#include "symfile.h"
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#include "objfiles.h"
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/* Prototypes for local functions. */
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static void
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catch_command_1 PARAMS ((char *, int, int));
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static void
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enable_delete_command PARAMS ((char *, int));
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static void
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enable_delete_breakpoint PARAMS ((struct breakpoint *));
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static void
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enable_once_command PARAMS ((char *, int));
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static void
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enable_once_breakpoint PARAMS ((struct breakpoint *));
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static void
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disable_command PARAMS ((char *, int));
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static void
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enable_command PARAMS ((char *, int));
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static void
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map_breakpoint_numbers PARAMS ((char *, void (*)(struct breakpoint *)));
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static void
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ignore_command PARAMS ((char *, int));
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static int
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breakpoint_re_set_one PARAMS ((char *));
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static void
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clear_command PARAMS ((char *, int));
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static void
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catch_command PARAMS ((char *, int));
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static void
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handle_gnu_4_16_catch_command PARAMS ((char *, int, int));
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static struct symtabs_and_lines
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get_catch_sals PARAMS ((int));
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static void
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watch_command PARAMS ((char *, int));
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static int
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can_use_hardware_watchpoint PARAMS ((struct value *));
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void
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tbreak_command PARAMS ((char *, int));
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static void
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break_command_1 PARAMS ((char *, int, int));
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static void
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mention PARAMS ((struct breakpoint *));
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struct breakpoint *
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set_raw_breakpoint PARAMS ((struct symtab_and_line));
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static void
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check_duplicates PARAMS ((CORE_ADDR, asection *));
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static void
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describe_other_breakpoints PARAMS ((CORE_ADDR, asection *));
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static void
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breakpoints_info PARAMS ((char *, int));
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static void
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breakpoint_1 PARAMS ((int, int));
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static bpstat
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bpstat_alloc PARAMS ((struct breakpoint *, bpstat));
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static int
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breakpoint_cond_eval PARAMS ((char *));
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static void
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cleanup_executing_breakpoints PARAMS ((PTR));
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static void
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commands_command PARAMS ((char *, int));
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static void
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condition_command PARAMS ((char *, int));
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static int
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get_number PARAMS ((char **));
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void
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set_breakpoint_count PARAMS ((int));
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#if 0
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static struct breakpoint *
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create_temp_exception_breakpoint PARAMS ((CORE_ADDR));
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#endif
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typedef enum {
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mark_inserted,
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mark_uninserted,
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} insertion_state_t;
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static int
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remove_breakpoint PARAMS ((struct breakpoint *, insertion_state_t));
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static int print_it_normal PARAMS ((bpstat));
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typedef struct {
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enum exception_event_kind kind;
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int enable;
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} args_for_catchpoint_enable;
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static int watchpoint_check PARAMS ((char *));
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static struct symtab_and_line *
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cover_target_enable_exception_callback PARAMS ((args_for_catchpoint_enable *));
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static int print_it_done PARAMS ((bpstat));
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static int print_it_noop PARAMS ((bpstat));
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static void maintenance_info_breakpoints PARAMS ((char *, int));
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#ifdef GET_LONGJMP_TARGET
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static void create_longjmp_breakpoint PARAMS ((char *));
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#endif
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static int hw_breakpoint_used_count PARAMS ((void));
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static int hw_watchpoint_used_count PARAMS ((enum bptype, int *));
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static void hbreak_command PARAMS ((char *, int));
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static void thbreak_command PARAMS ((char *, int));
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static void watch_command_1 PARAMS ((char *, int, int));
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static void rwatch_command PARAMS ((char *, int));
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static void awatch_command PARAMS ((char *, int));
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static void do_enable_breakpoint PARAMS ((struct breakpoint *, enum bpdisp));
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/* Prototypes for exported functions. */
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static void
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awatch_command PARAMS ((char *, int));
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static void
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do_enable_breakpoint PARAMS ((struct breakpoint *, enum bpdisp));
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/* If FALSE, gdb will not use hardware support for watchpoints, even
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if such is available. */
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static int can_use_hw_watchpoints;
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void delete_command PARAMS ((char *, int));
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void _initialize_breakpoint PARAMS ((void));
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void set_breakpoint_count PARAMS ((int));
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extern int addressprint; /* Print machine addresses? */
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#if defined (GET_LONGJMP_TARGET) || defined (SOLIB_ADD)
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static int internal_breakpoint_number = -1;
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#endif
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/* Are we executing breakpoint commands? */
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static int executing_breakpoint_commands;
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/* Walk the following statement or block through all breakpoints.
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ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
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breakpoint. */
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#define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next)
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#define ALL_BREAKPOINTS_SAFE(b,tmp) \
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for (b = breakpoint_chain; \
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b? (tmp=b->next, 1): 0; \
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b = tmp)
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/* True if SHIFT_INST_REGS defined, false otherwise. */
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int must_shift_inst_regs =
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#if defined(SHIFT_INST_REGS)
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1
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#else
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0
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#endif
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;
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/* True if breakpoint hit counts should be displayed in breakpoint info. */
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int show_breakpoint_hit_counts = 1;
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/* Chain of all breakpoints defined. */
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struct breakpoint *breakpoint_chain;
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/* Number of last breakpoint made. */
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int breakpoint_count;
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/* Pointer to current exception event record */
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static struct exception_event_record * current_exception_event;
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/* Indicator of whether exception catchpoints should be nuked
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between runs of a program */
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int exception_catchpoints_are_fragile = 0;
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/* Indicator of when exception catchpoints set-up should be
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reinitialized -- e.g. when program is re-run */
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int exception_support_initialized = 0;
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/* Set breakpoint count to NUM. */
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void
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set_breakpoint_count (num)
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int num;
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{
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breakpoint_count = num;
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set_internalvar (lookup_internalvar ("bpnum"),
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value_from_longest (builtin_type_int, (LONGEST) num));
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}
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/* Used in run_command to zero the hit count when a new run starts. */
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void
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clear_breakpoint_hit_counts ()
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{
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struct breakpoint *b;
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ALL_BREAKPOINTS (b)
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b->hit_count = 0;
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}
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/* Default address, symtab and line to put a breakpoint at
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for "break" command with no arg.
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if default_breakpoint_valid is zero, the other three are
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not valid, and "break" with no arg is an error.
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This set by print_stack_frame, which calls set_default_breakpoint. */
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int default_breakpoint_valid;
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CORE_ADDR default_breakpoint_address;
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struct symtab *default_breakpoint_symtab;
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int default_breakpoint_line;
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/* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
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Advance *PP after the string and any trailing whitespace.
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Currently the string can either be a number or "$" followed by the name
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of a convenience variable. Making it an expression wouldn't work well
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for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */
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static int
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get_number (pp)
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char **pp;
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{
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int retval;
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char *p = *pp;
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if (p == NULL)
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/* Empty line means refer to the last breakpoint. */
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return breakpoint_count;
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else if (*p == '$')
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{
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/* Make a copy of the name, so we can null-terminate it
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to pass to lookup_internalvar(). */
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char *varname;
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char *start = ++p;
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value_ptr val;
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while (isalnum (*p) || *p == '_')
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p++;
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varname = (char *) alloca (p - start + 1);
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strncpy (varname, start, p - start);
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varname[p - start] = '\0';
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val = value_of_internalvar (lookup_internalvar (varname));
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if (TYPE_CODE (VALUE_TYPE (val)) != TYPE_CODE_INT)
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error (
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"Convenience variables used to specify breakpoints must have integer values."
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);
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retval = (int) value_as_long (val);
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}
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else
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{
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if (*p == '-')
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++p;
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while (*p >= '0' && *p <= '9')
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++p;
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if (p == *pp)
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/* There is no number here. (e.g. "cond a == b"). */
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error_no_arg ("breakpoint number");
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retval = atoi (*pp);
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}
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if (!(isspace (*p) || *p == '\0'))
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error ("breakpoint number expected");
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while (isspace (*p))
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p++;
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*pp = p;
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return retval;
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}
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/* condition N EXP -- set break condition of breakpoint N to EXP. */
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static void
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condition_command (arg, from_tty)
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char *arg;
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int from_tty;
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{
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register struct breakpoint *b;
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char *p;
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register int bnum;
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if (arg == 0)
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error_no_arg ("breakpoint number");
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p = arg;
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bnum = get_number (&p);
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ALL_BREAKPOINTS (b)
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if (b->number == bnum)
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{
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if (b->cond)
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{
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free ((PTR)b->cond);
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b->cond = 0;
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}
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if (b->cond_string != NULL)
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free ((PTR)b->cond_string);
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if (*p == 0)
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{
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b->cond = 0;
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b->cond_string = NULL;
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if (from_tty)
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printf_filtered ("Breakpoint %d now unconditional.\n", bnum);
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}
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else
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{
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arg = p;
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/* I don't know if it matters whether this is the string the user
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typed in or the decompiled expression. */
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b->cond_string = savestring (arg, strlen (arg));
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b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0);
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if (*arg)
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error ("Junk at end of expression");
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}
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breakpoints_changed ();
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return;
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}
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error ("No breakpoint number %d.", bnum);
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}
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/* ARGSUSED */
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static void
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commands_command (arg, from_tty)
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char *arg;
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int from_tty;
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{
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register struct breakpoint *b;
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char *p;
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register int bnum;
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struct command_line *l;
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/* If we allowed this, we would have problems with when to
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free the storage, if we change the commands currently
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being read from. */
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if (executing_breakpoint_commands)
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error ("Can't use the \"commands\" command among a breakpoint's commands.");
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p = arg;
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bnum = get_number (&p);
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if (p && *p)
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error ("Unexpected extra arguments following breakpoint number.");
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ALL_BREAKPOINTS (b)
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if (b->number == bnum)
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{
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char tmpbuf[128];
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sprintf (tmpbuf, "Type commands for when breakpoint %d is hit, one per line.", bnum);
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l = read_command_lines (tmpbuf, from_tty);
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free_command_lines (&b->commands);
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b->commands = l;
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breakpoints_changed ();
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return;
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}
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error ("No breakpoint number %d.", bnum);
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}
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/* Like target_read_memory() but if breakpoints are inserted, return
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the shadow contents instead of the breakpoints themselves.
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Read "memory data" from whatever target or inferior we have.
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Returns zero if successful, errno value if not. EIO is used
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for address out of bounds. If breakpoints are inserted, returns
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shadow contents, not the breakpoints themselves. From breakpoint.c. */
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int
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read_memory_nobpt (memaddr, myaddr, len)
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CORE_ADDR memaddr;
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char *myaddr;
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unsigned len;
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{
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int status;
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struct breakpoint *b;
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CORE_ADDR bp_addr = 0;
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int bp_size = 0;
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if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
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/* No breakpoints on this machine. */
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return target_read_memory (memaddr, myaddr, len);
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ALL_BREAKPOINTS (b)
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{
|
||
if (b->type == bp_none)
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warning ("attempted to read through apparently deleted breakpoint #%d?\n", b->number);
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/* memory breakpoint? */
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if (b->type == bp_watchpoint
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|| b->type == bp_hardware_watchpoint
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|| b->type == bp_read_watchpoint
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|| b->type == bp_access_watchpoint)
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continue;
|
||
/* bp in memory? */
|
||
if (!b->inserted)
|
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continue;
|
||
/* Addresses and length of the part of the breakpoint that
|
||
we need to copy. */
|
||
/* XXXX The m68k, sh and h8300 have different local and remote
|
||
breakpoint values. BREAKPOINT_FROM_PC still manages to
|
||
correctly determine the breakpoints memory address and size
|
||
for these targets. */
|
||
bp_addr = b->address;
|
||
bp_size = 0;
|
||
if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
|
||
continue;
|
||
if (bp_size == 0)
|
||
/* bp isn't valid */
|
||
continue;
|
||
if (bp_addr + bp_size <= memaddr)
|
||
/* The breakpoint is entirely before the chunk of memory we
|
||
are reading. */
|
||
continue;
|
||
if (bp_addr >= memaddr + len)
|
||
/* The breakpoint is entirely after the chunk of memory we are
|
||
reading. */
|
||
continue;
|
||
/* Copy the breakpoint from the shadow contents, and recurse for
|
||
the things before and after. */
|
||
{
|
||
/* Offset within shadow_contents. */
|
||
int bptoffset = 0;
|
||
|
||
if (bp_addr < memaddr)
|
||
{
|
||
/* Only copy the second part of the breakpoint. */
|
||
bp_size -= memaddr - bp_addr;
|
||
bptoffset = memaddr - bp_addr;
|
||
bp_addr = memaddr;
|
||
}
|
||
|
||
if (bp_addr + bp_size > memaddr + len)
|
||
{
|
||
/* Only copy the first part of the breakpoint. */
|
||
bp_size -= (bp_addr + bp_size) - (memaddr + len);
|
||
}
|
||
|
||
memcpy (myaddr + bp_addr - memaddr,
|
||
b->shadow_contents + bptoffset, bp_size);
|
||
|
||
if (bp_addr > memaddr)
|
||
{
|
||
/* Copy the section of memory before the breakpoint. */
|
||
status = read_memory_nobpt (memaddr, myaddr, bp_addr - memaddr);
|
||
if (status != 0)
|
||
return status;
|
||
}
|
||
|
||
if (bp_addr + bp_size < memaddr + len)
|
||
{
|
||
/* Copy the section of memory after the breakpoint. */
|
||
status = read_memory_nobpt
|
||
(bp_addr + bp_size,
|
||
myaddr + bp_addr + bp_size - memaddr,
|
||
memaddr + len - (bp_addr + bp_size));
|
||
if (status != 0)
|
||
return status;
|
||
}
|
||
return 0;
|
||
}
|
||
}
|
||
/* Nothing overlaps. Just call read_memory_noerr. */
|
||
return target_read_memory (memaddr, myaddr, len);
|
||
}
|
||
|
||
|
||
/* insert_breakpoints is used when starting or continuing the program.
|
||
remove_breakpoints is used when the program stops.
|
||
Both return zero if successful,
|
||
or an `errno' value if could not write the inferior. */
|
||
|
||
int
|
||
insert_breakpoints ()
|
||
{
|
||
register struct breakpoint *b, *temp;
|
||
int val = 0;
|
||
int disabled_breaks = 0;
|
||
|
||
static char message1[] = "Error inserting catchpoint %d:\n";
|
||
static char message[sizeof (message1) + 30];
|
||
|
||
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
{
|
||
if (b->type != bp_watchpoint
|
||
&& b->type != bp_hardware_watchpoint
|
||
&& b->type != bp_read_watchpoint
|
||
&& b->type != bp_access_watchpoint
|
||
&& b->type != bp_catch_fork
|
||
&& b->type != bp_catch_vfork
|
||
&& b->type != bp_catch_exec
|
||
&& b->type != bp_catch_throw
|
||
&& b->type != bp_catch_catch
|
||
&& b->enable != disabled
|
||
&& b->enable != shlib_disabled
|
||
&& b->enable != call_disabled
|
||
&& ! b->inserted
|
||
&& ! b->duplicate)
|
||
{
|
||
if (b->type == bp_hardware_breakpoint)
|
||
val = target_insert_hw_breakpoint(b->address, b->shadow_contents);
|
||
else
|
||
{
|
||
/* Check to see if breakpoint is in an overlay section;
|
||
if so, we should set the breakpoint at the LMA address.
|
||
Only if the section is currently mapped should we ALSO
|
||
set a break at the VMA address. */
|
||
if (overlay_debugging && b->section &&
|
||
section_is_overlay (b->section))
|
||
{
|
||
CORE_ADDR addr;
|
||
|
||
addr = overlay_unmapped_address (b->address, b->section);
|
||
val = target_insert_breakpoint (addr, b->shadow_contents);
|
||
/* This would be the time to check val, to see if the
|
||
breakpoint write to the load address succeeded.
|
||
However, this might be an ordinary occurrance, eg. if
|
||
the unmapped overlay is in ROM. */
|
||
val = 0; /* in case unmapped address failed */
|
||
if (section_is_mapped (b->section))
|
||
val = target_insert_breakpoint (b->address,
|
||
b->shadow_contents);
|
||
}
|
||
else /* ordinary (non-overlay) address */
|
||
val = target_insert_breakpoint(b->address, b->shadow_contents);
|
||
}
|
||
if (val)
|
||
{
|
||
/* Can't set the breakpoint. */
|
||
#if defined (DISABLE_UNSETTABLE_BREAK)
|
||
if (DISABLE_UNSETTABLE_BREAK (b->address))
|
||
{
|
||
/* See also: disable_breakpoints_in_shlibs. */
|
||
val = 0;
|
||
b->enable = shlib_disabled;
|
||
if (!disabled_breaks)
|
||
{
|
||
target_terminal_ours_for_output ();
|
||
fprintf_unfiltered (gdb_stderr,
|
||
"Cannot insert breakpoint %d:\n", b->number);
|
||
printf_filtered ("Temporarily disabling shared library breakpoints:\n");
|
||
}
|
||
disabled_breaks = 1;
|
||
printf_filtered ("%d ", b->number);
|
||
}
|
||
else
|
||
#endif
|
||
{
|
||
target_terminal_ours_for_output ();
|
||
fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number);
|
||
#ifdef ONE_PROCESS_WRITETEXT
|
||
fprintf_unfiltered (gdb_stderr,
|
||
"The same program may be running in another process.\n");
|
||
#endif
|
||
memory_error (val, b->address); /* which bombs us out */
|
||
}
|
||
}
|
||
else
|
||
b->inserted = 1;
|
||
}
|
||
else if (ep_is_exception_catchpoint (b)
|
||
&& b->enable != disabled
|
||
&& b->enable != shlib_disabled
|
||
&& b->enable != call_disabled
|
||
&& ! b->inserted
|
||
&& ! b->duplicate)
|
||
|
||
{
|
||
/* If we get here, we must have a callback mechanism for exception
|
||
events -- with g++ style embedded label support, we insert
|
||
ordinary breakpoints and not catchpoints. */
|
||
struct symtab_and_line * sal;
|
||
args_for_catchpoint_enable args;
|
||
sprintf (message, message1, b->number); /* Format possible error message */
|
||
|
||
val = target_insert_breakpoint(b->address, b->shadow_contents);
|
||
if (val)
|
||
{
|
||
/* Couldn't set breakpoint for some reason */
|
||
target_terminal_ours_for_output ();
|
||
fprintf_unfiltered (gdb_stderr,
|
||
"Cannot insert catchpoint %d; disabling it\n", b->number);
|
||
b->enable = disabled;
|
||
}
|
||
else
|
||
{
|
||
/* Bp set, now make sure callbacks are enabled */
|
||
args.kind = b->type == bp_catch_catch ? EX_EVENT_CATCH : EX_EVENT_THROW;
|
||
args.enable = 1;
|
||
sal = catch_errors ((int (*) PARAMS ((char *))) cover_target_enable_exception_callback,
|
||
(char *) &args,
|
||
message, RETURN_MASK_ALL);
|
||
if (sal && (sal != (struct symtab_and_line *) -1))
|
||
{
|
||
b->inserted = 1;
|
||
}
|
||
/* Check if something went wrong; sal == 0 can be ignored */
|
||
if (sal == (struct symtab_and_line *) -1)
|
||
{
|
||
/* something went wrong */
|
||
target_terminal_ours_for_output ();
|
||
fprintf_unfiltered (gdb_stderr, "Cannot insert catchpoint %d; disabling it\n", b->number);
|
||
b->enable = disabled;
|
||
}
|
||
}
|
||
}
|
||
|
||
else if ((b->type == bp_hardware_watchpoint ||
|
||
b->type == bp_read_watchpoint ||
|
||
b->type == bp_access_watchpoint)
|
||
&& b->enable == enabled
|
||
&& ! b->inserted
|
||
&& ! b->duplicate)
|
||
{
|
||
struct frame_info *saved_frame;
|
||
int saved_level, within_current_scope;
|
||
value_ptr mark = value_mark ();
|
||
value_ptr v;
|
||
|
||
/* Save the current frame and level so we can restore it after
|
||
evaluating the watchpoint expression on its own frame. */
|
||
saved_frame = selected_frame;
|
||
saved_level = selected_frame_level;
|
||
|
||
/* Determine if the watchpoint is within scope. */
|
||
if (b->exp_valid_block == NULL)
|
||
within_current_scope = 1;
|
||
else
|
||
{
|
||
struct frame_info *fi;
|
||
|
||
/* There might be no current frame at this moment if we are
|
||
resuming from a step over a breakpoint.
|
||
Set up current frame before trying to find the watchpoint
|
||
frame. */
|
||
get_current_frame ();
|
||
fi = find_frame_addr_in_frame_chain (b->watchpoint_frame);
|
||
within_current_scope = (fi != NULL);
|
||
if (within_current_scope)
|
||
select_frame (fi, -1);
|
||
}
|
||
|
||
if (within_current_scope)
|
||
{
|
||
/* Evaluate the expression and cut the chain of values
|
||
produced off from the value chain. */
|
||
v = evaluate_expression (b->exp);
|
||
value_release_to_mark (mark);
|
||
|
||
b->val_chain = v;
|
||
b->inserted = 1;
|
||
|
||
/* Look at each value on the value chain. */
|
||
for ( ; v; v=v->next)
|
||
{
|
||
/* If it's a memory location, then we must watch it. */
|
||
if (v->lval == lval_memory)
|
||
{
|
||
int addr, len, type;
|
||
|
||
addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
|
||
len = TYPE_LENGTH (VALUE_TYPE (v));
|
||
type = 0;
|
||
if (b->type == bp_read_watchpoint)
|
||
type = 1;
|
||
else if (b->type == bp_access_watchpoint)
|
||
type = 2;
|
||
|
||
val = target_insert_watchpoint (addr, len, type);
|
||
if (val == -1)
|
||
{
|
||
b->inserted = 0;
|
||
break;
|
||
}
|
||
val = 0;
|
||
}
|
||
}
|
||
/* Failure to insert a watchpoint on any memory value in the
|
||
value chain brings us here. */
|
||
if (!b->inserted)
|
||
warning ("Hardware watchpoint %d: Could not insert watchpoint\n",
|
||
b->number);
|
||
}
|
||
else
|
||
{
|
||
printf_filtered ("\
|
||
Hardware watchpoint %d deleted because the program has left the block in\n\
|
||
which its expression is valid.\n", b->number);
|
||
if (b->related_breakpoint)
|
||
b->related_breakpoint->disposition = del_at_next_stop;
|
||
b->disposition = del_at_next_stop;
|
||
}
|
||
|
||
/* Restore the frame and level. */
|
||
if ((saved_frame != selected_frame) ||
|
||
(saved_level != selected_frame_level))
|
||
select_and_print_frame (saved_frame, saved_level);
|
||
}
|
||
else if ((b->type == bp_catch_fork
|
||
|| b->type == bp_catch_vfork
|
||
|| b->type == bp_catch_exec)
|
||
&& b->enable == enabled
|
||
&& ! b->inserted
|
||
&& ! b->duplicate)
|
||
{
|
||
val = -1;
|
||
switch (b->type)
|
||
{
|
||
case bp_catch_fork :
|
||
val = target_insert_fork_catchpoint (inferior_pid);
|
||
break;
|
||
case bp_catch_vfork :
|
||
val = target_insert_vfork_catchpoint (inferior_pid);
|
||
break;
|
||
case bp_catch_exec :
|
||
val = target_insert_exec_catchpoint (inferior_pid);
|
||
break;
|
||
}
|
||
if (val < 0)
|
||
{
|
||
target_terminal_ours_for_output ();
|
||
fprintf_unfiltered (gdb_stderr, "Cannot insert catchpoint %d:\n", b->number);
|
||
}
|
||
else
|
||
b->inserted = 1;
|
||
}
|
||
}
|
||
if (disabled_breaks)
|
||
printf_filtered ("\n");
|
||
|
||
return val;
|
||
}
|
||
|
||
|
||
int
|
||
remove_breakpoints ()
|
||
{
|
||
register struct breakpoint *b;
|
||
int val;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->inserted)
|
||
{
|
||
val = remove_breakpoint (b, mark_uninserted);
|
||
if (val != 0)
|
||
return val;
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
reattach_breakpoints (pid)
|
||
int pid;
|
||
{
|
||
register struct breakpoint *b;
|
||
int val;
|
||
int saved_inferior_pid = inferior_pid;
|
||
|
||
inferior_pid = pid; /* Because remove_breakpoint will use this global. */
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->inserted)
|
||
{
|
||
remove_breakpoint (b, mark_inserted);
|
||
if (b->type == bp_hardware_breakpoint)
|
||
val = target_insert_hw_breakpoint(b->address, b->shadow_contents);
|
||
else
|
||
val = target_insert_breakpoint(b->address, b->shadow_contents);
|
||
if (val != 0)
|
||
{
|
||
inferior_pid = saved_inferior_pid;
|
||
return val;
|
||
}
|
||
}
|
||
}
|
||
inferior_pid = saved_inferior_pid;
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
update_breakpoints_after_exec ()
|
||
{
|
||
struct breakpoint * b;
|
||
struct breakpoint * temp;
|
||
|
||
/* Doing this first prevents the badness of having delete_breakpoint()
|
||
write a breakpoint's current "shadow contents" to lift the bp. That
|
||
shadow is NOT valid after an exec()! */
|
||
mark_breakpoints_out ();
|
||
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
{
|
||
/* Solib breakpoints must be explicitly reset after an exec(). */
|
||
if (b->type == bp_shlib_event)
|
||
{
|
||
delete_breakpoint (b);
|
||
continue;
|
||
}
|
||
|
||
/* Step-resume breakpoints are meaningless after an exec(). */
|
||
if (b->type == bp_step_resume)
|
||
{
|
||
delete_breakpoint (b);
|
||
continue;
|
||
}
|
||
|
||
/* Ditto the sigtramp handler breakpoints. */
|
||
if (b->type == bp_through_sigtramp)
|
||
{
|
||
delete_breakpoint (b);
|
||
continue;
|
||
}
|
||
|
||
/* Ditto the exception-handling catchpoints. */
|
||
if ((b->type == bp_catch_catch) || (b->type == bp_catch_throw))
|
||
{
|
||
delete_breakpoint (b);
|
||
continue;
|
||
}
|
||
|
||
/* Don't delete an exec catchpoint, because else the inferior
|
||
won't stop when it ought!
|
||
|
||
Similarly, we probably ought to keep vfork catchpoints, 'cause
|
||
on this target, we may not be able to stop when the vfork is seen,
|
||
but only when the subsequent exec is seen. (And because deleting
|
||
fork catchpoints here but not vfork catchpoints will seem mysterious
|
||
to users, keep those too.)
|
||
|
||
??rehrauer: Let's hope that merely clearing out this catchpoint's
|
||
target address field, if any, is sufficient to have it be reset
|
||
automagically. Certainly on HP-UX that's true. */
|
||
if ((b->type == bp_catch_exec) ||
|
||
(b->type == bp_catch_vfork) ||
|
||
(b->type == bp_catch_fork))
|
||
{
|
||
b->address = NULL;
|
||
continue;
|
||
}
|
||
|
||
/* bp_finish is a special case. The only way we ought to be able
|
||
to see one of these when an exec() has happened, is if the user
|
||
caught a vfork, and then said "finish". Ordinarily a finish just
|
||
carries them to the call-site of the current callee, by setting
|
||
a temporary bp there and resuming. But in this case, the finish
|
||
will carry them entirely through the vfork & exec.
|
||
|
||
We don't want to allow a bp_finish to remain inserted now. But
|
||
we can't safely delete it, 'cause finish_command has a handle to
|
||
the bp on a bpstat, and will later want to delete it. There's a
|
||
chance (and I've seen it happen) that if we delete the bp_finish
|
||
here, that its storage will get reused by the time finish_command
|
||
gets 'round to deleting the "use to be a bp_finish" breakpoint.
|
||
We really must allow finish_command to delete a bp_finish.
|
||
|
||
In the absense of a general solution for the "how do we know it's
|
||
safe to delete something others may have handles to?" problem, what
|
||
we'll do here is just uninsert the bp_finish, and let finish_command
|
||
delete it.
|
||
|
||
(We know the bp_finish is "doomed" in the sense that it's momentary,
|
||
and will be deleted as soon as finish_command sees the inferior stopped.
|
||
So it doesn't matter that the bp's address is probably bogus in the
|
||
new a.out, unlike e.g., the solib breakpoints.) */
|
||
if (b->type == bp_finish)
|
||
{
|
||
continue;
|
||
}
|
||
|
||
/* Without a symbolic address, we have little hope of the
|
||
pre-exec() address meaning the same thing in the post-exec()
|
||
a.out. */
|
||
if (b->addr_string == NULL)
|
||
{
|
||
delete_breakpoint (b);
|
||
continue;
|
||
}
|
||
|
||
/* If this breakpoint has survived the above battery of checks, then
|
||
it must have a symbolic address. Be sure that it gets reevaluated
|
||
to a target address, rather than reusing the old evaluation. */
|
||
b->address = NULL;
|
||
}
|
||
}
|
||
|
||
int
|
||
detach_breakpoints (pid)
|
||
int pid;
|
||
{
|
||
register struct breakpoint *b;
|
||
int val;
|
||
int saved_inferior_pid = inferior_pid;
|
||
|
||
if (pid == inferior_pid)
|
||
error ("Cannot detach breakpoints of inferior_pid");
|
||
|
||
inferior_pid = pid; /* Because remove_breakpoint will use this global. */
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->inserted)
|
||
{
|
||
val = remove_breakpoint (b, mark_inserted);
|
||
if (val != 0)
|
||
{
|
||
inferior_pid = saved_inferior_pid;
|
||
return val;
|
||
}
|
||
}
|
||
}
|
||
inferior_pid = saved_inferior_pid;
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
remove_breakpoint (b, is)
|
||
struct breakpoint *b;
|
||
insertion_state_t is;
|
||
{
|
||
int val;
|
||
|
||
if (b->type == bp_none)
|
||
warning ("attempted to remove apparently deleted breakpoint #%d?\n", b->number);
|
||
|
||
if (b->type != bp_watchpoint
|
||
&& b->type != bp_hardware_watchpoint
|
||
&& b->type != bp_read_watchpoint
|
||
&& b->type != bp_access_watchpoint
|
||
&& b->type != bp_catch_fork
|
||
&& b->type != bp_catch_vfork
|
||
&& b->type != bp_catch_exec
|
||
&& b->type != bp_catch_catch
|
||
&& b->type != bp_catch_throw)
|
||
|
||
{
|
||
if (b->type == bp_hardware_breakpoint)
|
||
val = target_remove_hw_breakpoint(b->address, b->shadow_contents);
|
||
else
|
||
{
|
||
/* Check to see if breakpoint is in an overlay section;
|
||
if so, we should remove the breakpoint at the LMA address.
|
||
If that is not equal to the raw address, then we should
|
||
presumable remove the breakpoint there as well. */
|
||
if (overlay_debugging && b->section &&
|
||
section_is_overlay (b->section))
|
||
{
|
||
CORE_ADDR addr;
|
||
|
||
addr = overlay_unmapped_address (b->address, b->section);
|
||
val = target_remove_breakpoint (addr, b->shadow_contents);
|
||
/* This would be the time to check val, to see if the
|
||
shadow breakpoint write to the load address succeeded.
|
||
However, this might be an ordinary occurrance, eg. if
|
||
the unmapped overlay is in ROM. */
|
||
val = 0; /* in case unmapped address failed */
|
||
if (section_is_mapped (b->section))
|
||
val = target_remove_breakpoint (b->address,
|
||
b->shadow_contents);
|
||
}
|
||
else /* ordinary (non-overlay) address */
|
||
val = target_remove_breakpoint(b->address, b->shadow_contents);
|
||
}
|
||
if (val)
|
||
return val;
|
||
b->inserted = (is == mark_inserted);
|
||
}
|
||
else if ((b->type == bp_hardware_watchpoint ||
|
||
b->type == bp_read_watchpoint ||
|
||
b->type == bp_access_watchpoint)
|
||
&& b->enable == enabled
|
||
&& ! b->duplicate)
|
||
{
|
||
value_ptr v, n;
|
||
|
||
b->inserted = (is == mark_inserted);
|
||
/* Walk down the saved value chain. */
|
||
for (v = b->val_chain; v; v = v->next)
|
||
{
|
||
/* For each memory reference remove the watchpoint
|
||
at that address. */
|
||
if (v->lval == lval_memory)
|
||
{
|
||
int addr, len, type;
|
||
|
||
addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
|
||
len = TYPE_LENGTH (VALUE_TYPE (v));
|
||
type = 0;
|
||
if (b->type == bp_read_watchpoint)
|
||
type = 1;
|
||
else if (b->type == bp_access_watchpoint)
|
||
type = 2;
|
||
|
||
val = target_remove_watchpoint (addr, len, type);
|
||
if (val == -1)
|
||
b->inserted = 1;
|
||
val = 0;
|
||
}
|
||
}
|
||
/* Failure to remove any of the hardware watchpoints comes here. */
|
||
if ((is == mark_uninserted) && (b->inserted))
|
||
warning ("Hardware watchpoint %d: Could not remove watchpoint\n",
|
||
b->number);
|
||
|
||
/* Free the saved value chain. We will construct a new one
|
||
the next time the watchpoint is inserted. */
|
||
for (v = b->val_chain; v; v = n)
|
||
{
|
||
n = v->next;
|
||
value_free (v);
|
||
}
|
||
b->val_chain = NULL;
|
||
}
|
||
else if ((b->type == bp_catch_fork ||
|
||
b->type == bp_catch_vfork ||
|
||
b->type == bp_catch_exec)
|
||
&& b->enable == enabled
|
||
&& ! b->duplicate)
|
||
{
|
||
val = -1;
|
||
switch (b->type)
|
||
{
|
||
case bp_catch_fork:
|
||
val = target_remove_fork_catchpoint (inferior_pid);
|
||
break;
|
||
case bp_catch_vfork :
|
||
val = target_remove_vfork_catchpoint (inferior_pid);
|
||
break;
|
||
case bp_catch_exec :
|
||
val = target_remove_exec_catchpoint (inferior_pid);
|
||
break;
|
||
}
|
||
if (val)
|
||
return val;
|
||
b->inserted = (is == mark_inserted);
|
||
}
|
||
else if ((b->type == bp_catch_catch ||
|
||
b->type == bp_catch_throw)
|
||
&& b->enable == enabled
|
||
&& ! b->duplicate)
|
||
{
|
||
|
||
val = target_remove_breakpoint(b->address, b->shadow_contents);
|
||
if (val)
|
||
return val;
|
||
b->inserted = (is == mark_inserted);
|
||
}
|
||
else if (ep_is_exception_catchpoint (b)
|
||
&& b->inserted /* sometimes previous insert doesn't happen */
|
||
&& b->enable == enabled
|
||
&& ! b->duplicate)
|
||
{
|
||
|
||
val = target_remove_breakpoint(b->address, b->shadow_contents);
|
||
if (val)
|
||
return val;
|
||
|
||
b->inserted = (is == mark_inserted);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Clear the "inserted" flag in all breakpoints. */
|
||
|
||
void
|
||
mark_breakpoints_out ()
|
||
{
|
||
register struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
b->inserted = 0;
|
||
}
|
||
|
||
/* Clear the "inserted" flag in all breakpoints and delete any breakpoints
|
||
which should go away between runs of the program.
|
||
|
||
Plus other such housekeeping that has to be done for breakpoints
|
||
between runs.
|
||
|
||
Note: this function gets called at the end of a run (by generic_mourn_inferior)
|
||
and when a run begins (by init_wait_for_inferior). */
|
||
|
||
|
||
|
||
void
|
||
breakpoint_init_inferior (context)
|
||
enum inf_context context;
|
||
{
|
||
register struct breakpoint *b, *temp;
|
||
static int warning_needed = 0;
|
||
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
{
|
||
b->inserted = 0;
|
||
|
||
switch (b->type)
|
||
{
|
||
case bp_call_dummy:
|
||
case bp_watchpoint_scope:
|
||
|
||
/* If the call dummy breakpoint is at the entry point it will
|
||
cause problems when the inferior is rerun, so we better
|
||
get rid of it.
|
||
|
||
Also get rid of scope breakpoints. */
|
||
delete_breakpoint (b);
|
||
break;
|
||
|
||
case bp_watchpoint:
|
||
case bp_hardware_watchpoint:
|
||
case bp_read_watchpoint:
|
||
case bp_access_watchpoint:
|
||
|
||
/* Likewise for watchpoints on local expressions. */
|
||
if (b->exp_valid_block != NULL)
|
||
delete_breakpoint (b);
|
||
break;
|
||
default:
|
||
/* Likewise for exception catchpoints in dynamic-linked
|
||
executables where required */
|
||
if (ep_is_exception_catchpoint (b) &&
|
||
exception_catchpoints_are_fragile)
|
||
{
|
||
warning_needed = 1;
|
||
delete_breakpoint (b);
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (exception_catchpoints_are_fragile)
|
||
exception_support_initialized = 0;
|
||
|
||
/* Don't issue the warning unless it's really needed... */
|
||
if (warning_needed && (context != inf_exited))
|
||
{
|
||
warning ("Exception catchpoints from last run were deleted, you must reinsert them explicitly");
|
||
warning_needed = 0;
|
||
}
|
||
}
|
||
|
||
/* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC.
|
||
When continuing from a location with a breakpoint,
|
||
we actually single step once before calling insert_breakpoints. */
|
||
|
||
int
|
||
breakpoint_here_p (pc)
|
||
CORE_ADDR pc;
|
||
{
|
||
register struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->enable == enabled
|
||
&& b->enable != shlib_disabled
|
||
&& b->enable != call_disabled
|
||
&& b->address == pc) /* bp is enabled and matches pc */
|
||
{
|
||
if (overlay_debugging &&
|
||
section_is_overlay (b->section) &&
|
||
!section_is_mapped (b->section))
|
||
continue; /* unmapped overlay -- can't be a match */
|
||
else
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(), but it
|
||
only returns true if there is actually a breakpoint inserted at PC. */
|
||
|
||
int
|
||
breakpoint_inserted_here_p (pc)
|
||
CORE_ADDR pc;
|
||
{
|
||
register struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->inserted
|
||
&& b->address == pc) /* bp is inserted and matches pc */
|
||
{
|
||
if (overlay_debugging &&
|
||
section_is_overlay (b->section) &&
|
||
!section_is_mapped (b->section))
|
||
continue; /* unmapped overlay -- can't be a match */
|
||
else
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Return nonzero if FRAME is a dummy frame. We can't use PC_IN_CALL_DUMMY
|
||
because figuring out the saved SP would take too much time, at least using
|
||
get_saved_register on the 68k. This means that for this function to
|
||
work right a port must use the bp_call_dummy breakpoint. */
|
||
|
||
int
|
||
frame_in_dummy (frame)
|
||
struct frame_info *frame;
|
||
{
|
||
#ifdef CALL_DUMMY
|
||
#ifdef USE_GENERIC_DUMMY_FRAMES
|
||
return generic_pc_in_call_dummy (frame->pc, frame->frame);
|
||
#else
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
static ULONGEST dummy[] = CALL_DUMMY;
|
||
|
||
if (b->type == bp_call_dummy
|
||
&& b->frame == frame->frame
|
||
|
||
/* We need to check the PC as well as the frame on the sparc,
|
||
for signals.exp in the testsuite. */
|
||
&& (frame->pc
|
||
>= (b->address
|
||
- sizeof (dummy) / sizeof (LONGEST) * REGISTER_SIZE))
|
||
&& frame->pc <= b->address)
|
||
return 1;
|
||
}
|
||
#endif /* GENERIC_DUMMY_FRAMES */
|
||
#endif /* CALL_DUMMY */
|
||
return 0;
|
||
}
|
||
|
||
/* breakpoint_match_thread (PC, PID) returns true if the breakpoint at PC
|
||
is valid for process/thread PID. */
|
||
|
||
int
|
||
breakpoint_thread_match (pc, pid)
|
||
CORE_ADDR pc;
|
||
int pid;
|
||
{
|
||
struct breakpoint *b;
|
||
int thread;
|
||
|
||
thread = pid_to_thread_id (pid);
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->enable != disabled
|
||
&& b->enable != shlib_disabled
|
||
&& b->enable != call_disabled
|
||
&& b->address == pc
|
||
&& (b->thread == -1 || b->thread == thread))
|
||
{
|
||
if (overlay_debugging &&
|
||
section_is_overlay (b->section) &&
|
||
!section_is_mapped (b->section))
|
||
continue; /* unmapped overlay -- can't be a match */
|
||
else
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* bpstat stuff. External routines' interfaces are documented
|
||
in breakpoint.h. */
|
||
|
||
int
|
||
ep_is_catchpoint (ep)
|
||
struct breakpoint * ep;
|
||
{
|
||
return
|
||
(ep->type == bp_catch_load)
|
||
|| (ep->type == bp_catch_unload)
|
||
|| (ep->type == bp_catch_fork)
|
||
|| (ep->type == bp_catch_vfork)
|
||
|| (ep->type == bp_catch_exec)
|
||
|| (ep->type == bp_catch_catch)
|
||
|| (ep->type == bp_catch_throw)
|
||
|
||
|
||
/* ??rehrauer: Add more kinds here, as are implemented... */
|
||
;
|
||
}
|
||
|
||
int
|
||
ep_is_shlib_catchpoint (ep)
|
||
struct breakpoint * ep;
|
||
{
|
||
return
|
||
(ep->type == bp_catch_load)
|
||
|| (ep->type == bp_catch_unload)
|
||
;
|
||
}
|
||
|
||
int
|
||
ep_is_exception_catchpoint (ep)
|
||
struct breakpoint * ep;
|
||
{
|
||
return
|
||
(ep->type == bp_catch_catch)
|
||
|| (ep->type == bp_catch_throw)
|
||
;
|
||
}
|
||
|
||
/* Clear a bpstat so that it says we are not at any breakpoint.
|
||
Also free any storage that is part of a bpstat. */
|
||
|
||
void
|
||
bpstat_clear (bsp)
|
||
bpstat *bsp;
|
||
{
|
||
bpstat p;
|
||
bpstat q;
|
||
|
||
if (bsp == 0)
|
||
return;
|
||
p = *bsp;
|
||
while (p != NULL)
|
||
{
|
||
q = p->next;
|
||
if (p->old_val != NULL)
|
||
value_free (p->old_val);
|
||
free ((PTR)p);
|
||
p = q;
|
||
}
|
||
*bsp = NULL;
|
||
}
|
||
|
||
/* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
|
||
is part of the bpstat is copied as well. */
|
||
|
||
bpstat
|
||
bpstat_copy (bs)
|
||
bpstat bs;
|
||
{
|
||
bpstat p = NULL;
|
||
bpstat tmp;
|
||
bpstat retval = NULL;
|
||
|
||
if (bs == NULL)
|
||
return bs;
|
||
|
||
for (; bs != NULL; bs = bs->next)
|
||
{
|
||
tmp = (bpstat) xmalloc (sizeof (*tmp));
|
||
memcpy (tmp, bs, sizeof (*tmp));
|
||
if (p == NULL)
|
||
/* This is the first thing in the chain. */
|
||
retval = tmp;
|
||
else
|
||
p->next = tmp;
|
||
p = tmp;
|
||
}
|
||
p->next = NULL;
|
||
return retval;
|
||
}
|
||
|
||
/* Find the bpstat associated with this breakpoint */
|
||
|
||
bpstat
|
||
bpstat_find_breakpoint(bsp, breakpoint)
|
||
bpstat bsp;
|
||
struct breakpoint *breakpoint;
|
||
{
|
||
if (bsp == NULL) return NULL;
|
||
|
||
for (;bsp != NULL; bsp = bsp->next) {
|
||
if (bsp->breakpoint_at == breakpoint) return bsp;
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/* Find a step_resume breakpoint associated with this bpstat.
|
||
(If there are multiple step_resume bp's on the list, this function
|
||
will arbitrarily pick one.)
|
||
|
||
It is an error to use this function if BPSTAT doesn't contain a
|
||
step_resume breakpoint.
|
||
|
||
See wait_for_inferior's use of this function. */
|
||
struct breakpoint *
|
||
bpstat_find_step_resume_breakpoint (bsp)
|
||
bpstat bsp;
|
||
{
|
||
if (bsp == NULL)
|
||
error ("Internal error (bpstat_find_step_resume_breakpoint)");
|
||
|
||
for (; bsp != NULL; bsp = bsp->next)
|
||
{
|
||
if ((bsp->breakpoint_at != NULL) &&
|
||
(bsp->breakpoint_at->type == bp_step_resume))
|
||
return bsp->breakpoint_at;
|
||
}
|
||
|
||
error ("Internal error (no step_resume breakpoint found)");
|
||
}
|
||
|
||
|
||
/* Return the breakpoint number of the first breakpoint we are stopped
|
||
at. *BSP upon return is a bpstat which points to the remaining
|
||
breakpoints stopped at (but which is not guaranteed to be good for
|
||
anything but further calls to bpstat_num).
|
||
Return 0 if passed a bpstat which does not indicate any breakpoints. */
|
||
|
||
int
|
||
bpstat_num (bsp)
|
||
bpstat *bsp;
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
if ((*bsp) == NULL)
|
||
return 0; /* No more breakpoint values */
|
||
else
|
||
{
|
||
b = (*bsp)->breakpoint_at;
|
||
*bsp = (*bsp)->next;
|
||
if (b == NULL)
|
||
return -1; /* breakpoint that's been deleted since */
|
||
else
|
||
return b->number; /* We have its number */
|
||
}
|
||
}
|
||
|
||
/* Modify BS so that the actions will not be performed. */
|
||
|
||
void
|
||
bpstat_clear_actions (bs)
|
||
bpstat bs;
|
||
{
|
||
for (; bs != NULL; bs = bs->next)
|
||
{
|
||
bs->commands = NULL;
|
||
if (bs->old_val != NULL)
|
||
{
|
||
value_free (bs->old_val);
|
||
bs->old_val = NULL;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Stub for cleaning up our state if we error-out of a breakpoint command */
|
||
/* ARGSUSED */
|
||
static void
|
||
cleanup_executing_breakpoints (ignore)
|
||
PTR ignore;
|
||
{
|
||
executing_breakpoint_commands = 0;
|
||
}
|
||
|
||
/* Execute all the commands associated with all the breakpoints at this
|
||
location. Any of these commands could cause the process to proceed
|
||
beyond this point, etc. We look out for such changes by checking
|
||
the global "breakpoint_proceeded" after each command. */
|
||
|
||
void
|
||
bpstat_do_actions (bsp)
|
||
bpstat *bsp;
|
||
{
|
||
bpstat bs;
|
||
struct cleanup *old_chain;
|
||
struct command_line *cmd;
|
||
|
||
/* Avoid endless recursion if a `source' command is contained
|
||
in bs->commands. */
|
||
if (executing_breakpoint_commands)
|
||
return;
|
||
|
||
executing_breakpoint_commands = 1;
|
||
old_chain = make_cleanup (cleanup_executing_breakpoints, 0);
|
||
|
||
top:
|
||
/* Note that (as of this writing), our callers all appear to
|
||
be passing us the address of global stop_bpstat. And, if
|
||
our calls to execute_control_command cause the inferior to
|
||
proceed, that global (and hence, *bsp) will change.
|
||
|
||
We must be careful to not touch *bsp unless the inferior
|
||
has not proceeded. */
|
||
|
||
/* This pointer will iterate over the list of bpstat's. */
|
||
bs = *bsp;
|
||
|
||
breakpoint_proceeded = 0;
|
||
for (; bs != NULL; bs = bs->next)
|
||
{
|
||
cmd = bs->commands;
|
||
while (cmd != NULL)
|
||
{
|
||
execute_control_command (cmd);
|
||
|
||
if (breakpoint_proceeded)
|
||
break;
|
||
else
|
||
cmd = cmd->next;
|
||
}
|
||
if (breakpoint_proceeded)
|
||
/* The inferior is proceeded by the command; bomb out now.
|
||
The bpstat chain has been blown away by wait_for_inferior.
|
||
But since execution has stopped again, there is a new bpstat
|
||
to look at, so start over. */
|
||
goto top;
|
||
else
|
||
bs->commands = NULL;
|
||
}
|
||
|
||
executing_breakpoint_commands = 0;
|
||
discard_cleanups (old_chain);
|
||
}
|
||
|
||
/* This is the normal print_it function for a bpstat. In the future,
|
||
much of this logic could (should?) be moved to bpstat_stop_status,
|
||
by having it set different print_it functions.
|
||
|
||
Current scheme: When we stop, bpstat_print() is called.
|
||
It loops through the bpstat list of things causing this stop,
|
||
calling the print_it function for each one. The default
|
||
print_it function, used for breakpoints, is print_it_normal().
|
||
(Also see print_it_noop() and print_it_done()).
|
||
|
||
Return values from this routine (used by bpstat_print() to
|
||
decide what to do):
|
||
1: Means we printed something, and we do *not* desire that
|
||
something to be followed by a location.
|
||
0: Means we printed something, and we *do* desire that
|
||
something to be followed by a location.
|
||
-1: Means we printed nothing. */
|
||
|
||
static int
|
||
print_it_normal (bs)
|
||
bpstat bs;
|
||
{
|
||
/* bs->breakpoint_at can be NULL if it was a momentary breakpoint
|
||
which has since been deleted. */
|
||
if (bs->breakpoint_at == NULL
|
||
|| (bs->breakpoint_at->type != bp_breakpoint
|
||
&& bs->breakpoint_at->type != bp_catch_load
|
||
&& bs->breakpoint_at->type != bp_catch_unload
|
||
&& bs->breakpoint_at->type != bp_catch_fork
|
||
&& bs->breakpoint_at->type != bp_catch_vfork
|
||
&& bs->breakpoint_at->type != bp_catch_exec
|
||
&& bs->breakpoint_at->type != bp_catch_catch
|
||
&& bs->breakpoint_at->type != bp_catch_throw
|
||
&& bs->breakpoint_at->type != bp_hardware_breakpoint
|
||
&& bs->breakpoint_at->type != bp_watchpoint
|
||
&& bs->breakpoint_at->type != bp_read_watchpoint
|
||
&& bs->breakpoint_at->type != bp_access_watchpoint
|
||
&& bs->breakpoint_at->type != bp_hardware_watchpoint))
|
||
return -1;
|
||
|
||
if (ep_is_shlib_catchpoint (bs->breakpoint_at))
|
||
{
|
||
annotate_catchpoint (bs->breakpoint_at->number);
|
||
printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
|
||
if (bs->breakpoint_at->type == bp_catch_load)
|
||
printf_filtered ("loaded");
|
||
else if (bs->breakpoint_at->type == bp_catch_unload)
|
||
printf_filtered ("unloaded");
|
||
printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname);
|
||
return 0;
|
||
}
|
||
else if (bs->breakpoint_at->type == bp_catch_fork ||
|
||
bs->breakpoint_at->type == bp_catch_vfork)
|
||
{
|
||
annotate_catchpoint (bs->breakpoint_at->number);
|
||
printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
|
||
if (bs->breakpoint_at->type == bp_catch_fork)
|
||
printf_filtered ("forked");
|
||
else if (bs->breakpoint_at->type == bp_catch_vfork)
|
||
printf_filtered ("vforked");
|
||
printf_filtered (" process %d), ", bs->breakpoint_at->forked_inferior_pid);
|
||
return 0;
|
||
}
|
||
else if (bs->breakpoint_at->type == bp_catch_exec)
|
||
{
|
||
annotate_catchpoint (bs->breakpoint_at->number);
|
||
printf_filtered ("\nCatchpoint %d (exec'd %s), ",
|
||
bs->breakpoint_at->number,
|
||
bs->breakpoint_at->exec_pathname);
|
||
return 0;
|
||
}
|
||
else if (bs->breakpoint_at->type == bp_catch_catch)
|
||
{
|
||
if (current_exception_event && (CURRENT_EXCEPTION_KIND == EX_EVENT_CATCH))
|
||
{
|
||
annotate_catchpoint (bs->breakpoint_at->number);
|
||
printf_filtered ("\nCatchpoint %d (exception caught), ", bs->breakpoint_at->number);
|
||
printf_filtered ("throw location ");
|
||
if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
|
||
printf_filtered ("%s:%d",
|
||
CURRENT_EXCEPTION_THROW_FILE,
|
||
CURRENT_EXCEPTION_THROW_LINE);
|
||
else
|
||
printf_filtered ("unknown");
|
||
|
||
printf_filtered (", catch location ");
|
||
if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
|
||
printf_filtered ("%s:%d",
|
||
CURRENT_EXCEPTION_CATCH_FILE,
|
||
CURRENT_EXCEPTION_CATCH_LINE);
|
||
else
|
||
printf_filtered ("unknown");
|
||
|
||
printf_filtered ("\n");
|
||
return 1; /* don't bother to print location frame info */
|
||
}
|
||
else
|
||
{
|
||
return -1; /* really throw, some other bpstat will handle it */
|
||
}
|
||
}
|
||
else if (bs->breakpoint_at->type == bp_catch_throw)
|
||
{
|
||
if (current_exception_event && (CURRENT_EXCEPTION_KIND == EX_EVENT_THROW))
|
||
{
|
||
annotate_catchpoint (bs->breakpoint_at->number);
|
||
printf_filtered ("\nCatchpoint %d (exception thrown), ", bs->breakpoint_at->number);
|
||
printf_filtered ("throw location ");
|
||
if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
|
||
printf_filtered ("%s:%d",
|
||
CURRENT_EXCEPTION_THROW_FILE,
|
||
CURRENT_EXCEPTION_THROW_LINE);
|
||
else
|
||
printf_filtered ("unknown");
|
||
|
||
printf_filtered (", catch location ");
|
||
if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
|
||
printf_filtered ("%s:%d",
|
||
CURRENT_EXCEPTION_CATCH_FILE,
|
||
CURRENT_EXCEPTION_CATCH_LINE);
|
||
else
|
||
printf_filtered ("unknown");
|
||
|
||
printf_filtered ("\n");
|
||
return 1; /* don't bother to print location frame info */
|
||
}
|
||
else
|
||
{
|
||
return -1; /* really catch, some other bpstat willhandle it */
|
||
}
|
||
}
|
||
|
||
else if (bs->breakpoint_at->type == bp_breakpoint ||
|
||
bs->breakpoint_at->type == bp_hardware_breakpoint)
|
||
{
|
||
/* I think the user probably only wants to see one breakpoint
|
||
number, not all of them. */
|
||
annotate_breakpoint (bs->breakpoint_at->number);
|
||
printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number);
|
||
return 0;
|
||
}
|
||
else if ((bs->old_val != NULL) &&
|
||
(bs->breakpoint_at->type == bp_watchpoint ||
|
||
bs->breakpoint_at->type == bp_access_watchpoint ||
|
||
bs->breakpoint_at->type == bp_hardware_watchpoint))
|
||
{
|
||
annotate_watchpoint (bs->breakpoint_at->number);
|
||
mention (bs->breakpoint_at);
|
||
printf_filtered ("\nOld value = ");
|
||
value_print (bs->old_val, gdb_stdout, 0, Val_pretty_default);
|
||
printf_filtered ("\nNew value = ");
|
||
value_print (bs->breakpoint_at->val, gdb_stdout, 0,
|
||
Val_pretty_default);
|
||
printf_filtered ("\n");
|
||
value_free (bs->old_val);
|
||
bs->old_val = NULL;
|
||
/* More than one watchpoint may have been triggered. */
|
||
return -1;
|
||
}
|
||
else if (bs->breakpoint_at->type == bp_access_watchpoint ||
|
||
bs->breakpoint_at->type == bp_read_watchpoint)
|
||
{
|
||
mention (bs->breakpoint_at);
|
||
printf_filtered ("\nValue = ");
|
||
value_print (bs->breakpoint_at->val, gdb_stdout, 0,
|
||
Val_pretty_default);
|
||
printf_filtered ("\n");
|
||
return -1;
|
||
}
|
||
/* We can't deal with it. Maybe another member of the bpstat chain can. */
|
||
return -1;
|
||
}
|
||
|
||
/* Print a message indicating what happened.
|
||
This is called from normal_stop().
|
||
The input to this routine is the head of the bpstat list - a list
|
||
of the eventpoints that caused this stop.
|
||
This routine calls the "print_it" routine(s) associated
|
||
with these eventpoints. This will print (for example)
|
||
the "Breakpoint n," part of the output.
|
||
The return value of this routine is one of:
|
||
|
||
-1: Means we printed nothing
|
||
0: Means we printed something, and expect subsequent
|
||
code to print the location. An example is
|
||
"Breakpoint 1, " which should be followed by
|
||
the location.
|
||
1 : Means we printed something, but there is no need
|
||
to also print the location part of the message.
|
||
An example is the catch/throw messages, which
|
||
don't require a location appended to the end. */
|
||
|
||
int
|
||
bpstat_print (bs)
|
||
bpstat bs;
|
||
{
|
||
int val;
|
||
|
||
if (bs == NULL)
|
||
return -1;
|
||
|
||
val = (*bs->print_it) (bs);
|
||
if (val >= 0)
|
||
return val;
|
||
|
||
/* Maybe another breakpoint in the chain caused us to stop.
|
||
(Currently all watchpoints go on the bpstat whether hit or
|
||
not. That probably could (should) be changed, provided care is taken
|
||
with respect to bpstat_explains_signal). */
|
||
if (bs->next)
|
||
return bpstat_print (bs->next);
|
||
|
||
/* We reached the end of the chain without printing anything. */
|
||
return -1;
|
||
}
|
||
|
||
/* Evaluate the expression EXP and return 1 if value is zero.
|
||
This is used inside a catch_errors to evaluate the breakpoint condition.
|
||
The argument is a "struct expression *" that has been cast to char * to
|
||
make it pass through catch_errors. */
|
||
|
||
static int
|
||
breakpoint_cond_eval (exp)
|
||
char *exp;
|
||
{
|
||
value_ptr mark = value_mark ();
|
||
int i = !value_true (evaluate_expression ((struct expression *)exp));
|
||
value_free_to_mark (mark);
|
||
return i;
|
||
}
|
||
|
||
/* Allocate a new bpstat and chain it to the current one. */
|
||
|
||
static bpstat
|
||
bpstat_alloc (b, cbs)
|
||
register struct breakpoint *b;
|
||
bpstat cbs; /* Current "bs" value */
|
||
{
|
||
bpstat bs;
|
||
|
||
bs = (bpstat) xmalloc (sizeof (*bs));
|
||
cbs->next = bs;
|
||
bs->breakpoint_at = b;
|
||
/* If the condition is false, etc., don't do the commands. */
|
||
bs->commands = NULL;
|
||
bs->old_val = NULL;
|
||
bs->print_it = print_it_normal;
|
||
return bs;
|
||
}
|
||
|
||
/* Possible return values for watchpoint_check (this can't be an enum
|
||
because of check_errors). */
|
||
/* The watchpoint has been deleted. */
|
||
#define WP_DELETED 1
|
||
/* The value has changed. */
|
||
#define WP_VALUE_CHANGED 2
|
||
/* The value has not changed. */
|
||
#define WP_VALUE_NOT_CHANGED 3
|
||
|
||
#define BP_TEMPFLAG 1
|
||
#define BP_HARDWAREFLAG 2
|
||
|
||
/* Check watchpoint condition. */
|
||
|
||
static int
|
||
watchpoint_check (p)
|
||
char *p;
|
||
{
|
||
bpstat bs = (bpstat) p;
|
||
struct breakpoint *b;
|
||
struct frame_info *fr;
|
||
int within_current_scope;
|
||
|
||
b = bs->breakpoint_at;
|
||
|
||
if (b->exp_valid_block == NULL)
|
||
within_current_scope = 1;
|
||
else
|
||
{
|
||
/* There is no current frame at this moment. If we're going to have
|
||
any chance of handling watchpoints on local variables, we'll need
|
||
the frame chain (so we can determine if we're in scope). */
|
||
reinit_frame_cache();
|
||
fr = find_frame_addr_in_frame_chain (b->watchpoint_frame);
|
||
within_current_scope = (fr != NULL);
|
||
if (within_current_scope)
|
||
/* If we end up stopping, the current frame will get selected
|
||
in normal_stop. So this call to select_frame won't affect
|
||
the user. */
|
||
select_frame (fr, -1);
|
||
}
|
||
|
||
if (within_current_scope)
|
||
{
|
||
/* We use value_{,free_to_}mark because it could be a
|
||
*long* time before we return to the command level and
|
||
call free_all_values. We can't call free_all_values because
|
||
we might be in the middle of evaluating a function call. */
|
||
|
||
value_ptr mark = value_mark ();
|
||
value_ptr new_val = evaluate_expression (bs->breakpoint_at->exp);
|
||
if (!value_equal (b->val, new_val))
|
||
{
|
||
release_value (new_val);
|
||
value_free_to_mark (mark);
|
||
bs->old_val = b->val;
|
||
b->val = new_val;
|
||
/* We will stop here */
|
||
return WP_VALUE_CHANGED;
|
||
}
|
||
else
|
||
{
|
||
/* Nothing changed, don't do anything. */
|
||
value_free_to_mark (mark);
|
||
/* We won't stop here */
|
||
return WP_VALUE_NOT_CHANGED;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* This seems like the only logical thing to do because
|
||
if we temporarily ignored the watchpoint, then when
|
||
we reenter the block in which it is valid it contains
|
||
garbage (in the case of a function, it may have two
|
||
garbage values, one before and one after the prologue).
|
||
So we can't even detect the first assignment to it and
|
||
watch after that (since the garbage may or may not equal
|
||
the first value assigned). */
|
||
printf_filtered ("\
|
||
Watchpoint %d deleted because the program has left the block in\n\
|
||
which its expression is valid.\n", bs->breakpoint_at->number);
|
||
if (b->related_breakpoint)
|
||
b->related_breakpoint->disposition = del_at_next_stop;
|
||
b->disposition = del_at_next_stop;
|
||
|
||
return WP_DELETED;
|
||
}
|
||
}
|
||
|
||
/* This is used when everything which needs to be printed has
|
||
already been printed. But we still want to print the frame. */
|
||
|
||
/* Background: When we stop, bpstat_print() is called.
|
||
It loops through the bpstat list of things causing this stop,
|
||
calling the print_it function for each one. The default
|
||
print_it function, used for breakpoints, is print_it_normal().
|
||
Also see print_it_noop() and print_it_done() are the other
|
||
two possibilities. See comments in bpstat_print() and
|
||
in header of print_it_normal() for more detail. */
|
||
|
||
static int
|
||
print_it_done (bs)
|
||
bpstat bs;
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
/* This is used when nothing should be printed for this bpstat entry. */
|
||
/* Background: When we stop, bpstat_print() is called.
|
||
It loops through the bpstat list of things causing this stop,
|
||
calling the print_it function for each one. The default
|
||
print_it function, used for breakpoints, is print_it_normal().
|
||
Also see print_it_noop() and print_it_done() are the other
|
||
two possibilities. See comments in bpstat_print() and
|
||
in header of print_it_normal() for more detail. */
|
||
|
||
static int
|
||
print_it_noop (bs)
|
||
bpstat bs;
|
||
{
|
||
return -1;
|
||
}
|
||
|
||
/* Get a bpstat associated with having just stopped at address *PC
|
||
and frame address CORE_ADDRESS. Update *PC to point at the
|
||
breakpoint (if we hit a breakpoint). NOT_A_BREAKPOINT is nonzero
|
||
if this is known to not be a real breakpoint (it could still be a
|
||
watchpoint, though). */
|
||
|
||
/* Determine whether we stopped at a breakpoint, etc, or whether we
|
||
don't understand this stop. Result is a chain of bpstat's such that:
|
||
|
||
if we don't understand the stop, the result is a null pointer.
|
||
|
||
if we understand why we stopped, the result is not null.
|
||
|
||
Each element of the chain refers to a particular breakpoint or
|
||
watchpoint at which we have stopped. (We may have stopped for
|
||
several reasons concurrently.)
|
||
|
||
Each element of the chain has valid next, breakpoint_at,
|
||
commands, FIXME??? fields. */
|
||
|
||
bpstat
|
||
bpstat_stop_status (pc, not_a_breakpoint)
|
||
CORE_ADDR *pc;
|
||
int not_a_breakpoint;
|
||
{
|
||
register struct breakpoint *b, *temp;
|
||
CORE_ADDR bp_addr;
|
||
/* True if we've hit a breakpoint (as opposed to a watchpoint). */
|
||
int real_breakpoint = 0;
|
||
/* Root of the chain of bpstat's */
|
||
struct bpstats root_bs[1];
|
||
/* Pointer to the last thing in the chain currently. */
|
||
bpstat bs = root_bs;
|
||
static char message1[] =
|
||
"Error evaluating expression for watchpoint %d\n";
|
||
char message[sizeof (message1) + 30 /* slop */];
|
||
|
||
/* Get the address where the breakpoint would have been. */
|
||
bp_addr = *pc - DECR_PC_AFTER_BREAK;
|
||
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
{
|
||
if (b->enable == disabled
|
||
|| b->enable == shlib_disabled
|
||
|| b->enable == call_disabled)
|
||
continue;
|
||
|
||
if (b->type != bp_watchpoint
|
||
&& b->type != bp_hardware_watchpoint
|
||
&& b->type != bp_read_watchpoint
|
||
&& b->type != bp_access_watchpoint
|
||
&& b->type != bp_hardware_breakpoint
|
||
&& b->type != bp_catch_fork
|
||
&& b->type != bp_catch_vfork
|
||
&& b->type != bp_catch_exec
|
||
&& b->type != bp_catch_catch
|
||
&& b->type != bp_catch_throw) /* a non-watchpoint bp */
|
||
if (b->address != bp_addr || /* address doesn't match or */
|
||
(overlay_debugging && /* overlay doesn't match */
|
||
section_is_overlay (b->section) &&
|
||
!section_is_mapped (b->section)))
|
||
continue;
|
||
|
||
if (b->type == bp_hardware_breakpoint
|
||
&& b->address != (bp_addr - DECR_PC_AFTER_HW_BREAK))
|
||
continue;
|
||
|
||
if (b->type != bp_watchpoint
|
||
&& b->type != bp_hardware_watchpoint
|
||
&& b->type != bp_read_watchpoint
|
||
&& b->type != bp_access_watchpoint
|
||
&& not_a_breakpoint)
|
||
continue;
|
||
|
||
/* Is this a catchpoint of a load or unload? If so, did we
|
||
get a load or unload of the specified library? If not,
|
||
ignore it. */
|
||
if ((b->type == bp_catch_load)
|
||
#if defined(SOLIB_HAVE_LOAD_EVENT)
|
||
&& (!SOLIB_HAVE_LOAD_EVENT(inferior_pid)
|
||
|| ((b->dll_pathname != NULL)
|
||
&& (strcmp (b->dll_pathname, SOLIB_LOADED_LIBRARY_PATHNAME(inferior_pid)) != 0)))
|
||
#endif
|
||
)
|
||
continue;
|
||
|
||
if ((b->type == bp_catch_unload)
|
||
#if defined(SOLIB_HAVE_UNLOAD_EVENT)
|
||
&& (!SOLIB_HAVE_UNLOAD_EVENT(inferior_pid)
|
||
|| ((b->dll_pathname != NULL)
|
||
&& (strcmp (b->dll_pathname, SOLIB_UNLOADED_LIBRARY_PATHNAME(inferior_pid)) != 0)))
|
||
#endif
|
||
)
|
||
continue;
|
||
|
||
if ((b->type == bp_catch_fork)
|
||
&& ! target_has_forked (inferior_pid, &b->forked_inferior_pid))
|
||
continue;
|
||
|
||
if ((b->type == bp_catch_vfork)
|
||
&& ! target_has_vforked (inferior_pid, &b->forked_inferior_pid))
|
||
continue;
|
||
|
||
if ((b->type == bp_catch_exec)
|
||
&& ! target_has_execd (inferior_pid, &b->exec_pathname))
|
||
continue;
|
||
|
||
if (ep_is_exception_catchpoint (b) &&
|
||
!(current_exception_event = target_get_current_exception_event ()))
|
||
continue;
|
||
|
||
/* Come here if it's a watchpoint, or if the break address matches */
|
||
|
||
bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */
|
||
|
||
/* Watchpoints may change this, if not found to have triggered. */
|
||
bs->stop = 1;
|
||
bs->print = 1;
|
||
|
||
sprintf (message, message1, b->number);
|
||
if (b->type == bp_watchpoint || b->type == bp_hardware_watchpoint)
|
||
{
|
||
switch (catch_errors ((int (*) PARAMS ((char *))) watchpoint_check, (char *) bs, message,
|
||
RETURN_MASK_ALL))
|
||
{
|
||
case WP_DELETED:
|
||
/* We've already printed what needs to be printed. */
|
||
bs->print_it = print_it_done;
|
||
/* Stop. */
|
||
break;
|
||
case WP_VALUE_CHANGED:
|
||
/* Stop. */
|
||
++(b->hit_count);
|
||
break;
|
||
case WP_VALUE_NOT_CHANGED:
|
||
/* Don't stop. */
|
||
bs->print_it = print_it_noop;
|
||
bs->stop = 0;
|
||
/* Don't consider this a hit. */
|
||
--(b->hit_count);
|
||
continue;
|
||
default:
|
||
/* Can't happen. */
|
||
/* FALLTHROUGH */
|
||
case 0:
|
||
/* Error from catch_errors. */
|
||
printf_filtered ("Watchpoint %d deleted.\n", b->number);
|
||
if (b->related_breakpoint)
|
||
b->related_breakpoint->disposition = del_at_next_stop;
|
||
b->disposition = del_at_next_stop;
|
||
/* We've already printed what needs to be printed. */
|
||
bs->print_it = print_it_done;
|
||
|
||
/* Stop. */
|
||
break;
|
||
}
|
||
}
|
||
else if (b->type == bp_read_watchpoint || b->type == bp_access_watchpoint)
|
||
{
|
||
CORE_ADDR addr;
|
||
value_ptr v;
|
||
int found = 0;
|
||
|
||
addr = target_stopped_data_address();
|
||
if (addr == 0) continue;
|
||
for (v = b->val_chain; v; v = v->next)
|
||
{
|
||
if (v->lval == lval_memory)
|
||
{
|
||
CORE_ADDR vaddr;
|
||
|
||
vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
|
||
if (addr == vaddr)
|
||
found = 1;
|
||
}
|
||
}
|
||
if (found)
|
||
switch (catch_errors ((int (*) PARAMS ((char *))) watchpoint_check, (char *) bs, message,
|
||
RETURN_MASK_ALL))
|
||
{
|
||
case WP_DELETED:
|
||
/* We've already printed what needs to be printed. */
|
||
bs->print_it = print_it_done;
|
||
/* Stop. */
|
||
break;
|
||
case WP_VALUE_CHANGED:
|
||
case WP_VALUE_NOT_CHANGED:
|
||
/* Stop. */
|
||
++(b->hit_count);
|
||
break;
|
||
default:
|
||
/* Can't happen. */
|
||
case 0:
|
||
/* Error from catch_errors. */
|
||
printf_filtered ("Watchpoint %d deleted.\n", b->number);
|
||
if (b->related_breakpoint)
|
||
b->related_breakpoint->disposition = del_at_next_stop;
|
||
b->disposition = del_at_next_stop;
|
||
/* We've already printed what needs to be printed. */
|
||
bs->print_it = print_it_done;
|
||
break;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* By definition, an encountered breakpoint is a triggered
|
||
breakpoint. */
|
||
++(b->hit_count);
|
||
|
||
if (DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs)
|
||
real_breakpoint = 1;
|
||
}
|
||
|
||
if (b->frame && b->frame != (get_current_frame ())->frame &&
|
||
(b->type == bp_step_resume &&
|
||
(INNER_THAN (get_current_frame ()->frame, b->frame))))
|
||
bs->stop = 0;
|
||
else
|
||
{
|
||
int value_is_zero = 0;
|
||
|
||
if (b->cond)
|
||
{
|
||
/* Need to select the frame, with all that implies
|
||
so that the conditions will have the right context. */
|
||
select_frame (get_current_frame (), 0);
|
||
value_is_zero
|
||
= catch_errors ((int (*) PARAMS ((char *))) breakpoint_cond_eval, (char *)(b->cond),
|
||
"Error in testing breakpoint condition:\n",
|
||
RETURN_MASK_ALL);
|
||
/* FIXME-someday, should give breakpoint # */
|
||
free_all_values ();
|
||
}
|
||
if (b->cond && value_is_zero)
|
||
{
|
||
bs->stop = 0;
|
||
/* Don't consider this a hit. */
|
||
--(b->hit_count);
|
||
}
|
||
else if (b->ignore_count > 0)
|
||
{
|
||
b->ignore_count--;
|
||
bs->stop = 0;
|
||
}
|
||
else
|
||
{
|
||
/* We will stop here */
|
||
if (b->disposition == disable)
|
||
b->enable = disabled;
|
||
bs->commands = b->commands;
|
||
if (b->silent)
|
||
bs->print = 0;
|
||
if (bs->commands &&
|
||
(STREQ ("silent", bs->commands->line) ||
|
||
(xdb_commands && STREQ ("Q", bs->commands->line))))
|
||
{
|
||
bs->commands = bs->commands->next;
|
||
bs->print = 0;
|
||
}
|
||
}
|
||
}
|
||
/* Print nothing for this entry if we dont stop or if we dont print. */
|
||
if (bs->stop == 0 || bs->print == 0)
|
||
bs->print_it = print_it_noop;
|
||
}
|
||
|
||
bs->next = NULL; /* Terminate the chain */
|
||
bs = root_bs->next; /* Re-grab the head of the chain */
|
||
|
||
if ((DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs) && bs)
|
||
{
|
||
if (real_breakpoint)
|
||
{
|
||
*pc = bp_addr;
|
||
#if defined (SHIFT_INST_REGS)
|
||
SHIFT_INST_REGS();
|
||
#else /* No SHIFT_INST_REGS. */
|
||
write_pc (bp_addr);
|
||
#endif /* No SHIFT_INST_REGS. */
|
||
}
|
||
}
|
||
|
||
/* The value of a hardware watchpoint hasn't changed, but the
|
||
intermediate memory locations we are watching may have. */
|
||
if (bs && ! bs->stop &&
|
||
(bs->breakpoint_at->type == bp_hardware_watchpoint ||
|
||
bs->breakpoint_at->type == bp_read_watchpoint ||
|
||
bs->breakpoint_at->type == bp_access_watchpoint))
|
||
{
|
||
remove_breakpoints ();
|
||
insert_breakpoints ();
|
||
}
|
||
return bs;
|
||
}
|
||
|
||
/* Tell what to do about this bpstat. */
|
||
struct bpstat_what
|
||
bpstat_what (bs)
|
||
bpstat bs;
|
||
{
|
||
/* Classify each bpstat as one of the following. */
|
||
enum class {
|
||
/* This bpstat element has no effect on the main_action. */
|
||
no_effect = 0,
|
||
|
||
/* There was a watchpoint, stop but don't print. */
|
||
wp_silent,
|
||
|
||
/* There was a watchpoint, stop and print. */
|
||
wp_noisy,
|
||
|
||
/* There was a breakpoint but we're not stopping. */
|
||
bp_nostop,
|
||
|
||
/* There was a breakpoint, stop but don't print. */
|
||
bp_silent,
|
||
|
||
/* There was a breakpoint, stop and print. */
|
||
bp_noisy,
|
||
|
||
/* We hit the longjmp breakpoint. */
|
||
long_jump,
|
||
|
||
/* We hit the longjmp_resume breakpoint. */
|
||
long_resume,
|
||
|
||
/* We hit the step_resume breakpoint. */
|
||
step_resume,
|
||
|
||
/* We hit the through_sigtramp breakpoint. */
|
||
through_sig,
|
||
|
||
/* We hit the shared library event breakpoint. */
|
||
shlib_event,
|
||
|
||
/* We caught a shared library event. */
|
||
catch_shlib_event,
|
||
|
||
/* This is just used to count how many enums there are. */
|
||
class_last
|
||
};
|
||
|
||
/* Here is the table which drives this routine. So that we can
|
||
format it pretty, we define some abbreviations for the
|
||
enum bpstat_what codes. */
|
||
#define kc BPSTAT_WHAT_KEEP_CHECKING
|
||
#define ss BPSTAT_WHAT_STOP_SILENT
|
||
#define sn BPSTAT_WHAT_STOP_NOISY
|
||
#define sgl BPSTAT_WHAT_SINGLE
|
||
#define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
|
||
#define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
|
||
#define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
|
||
#define sr BPSTAT_WHAT_STEP_RESUME
|
||
#define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
|
||
#define shl BPSTAT_WHAT_CHECK_SHLIBS
|
||
#define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
|
||
|
||
/* "Can't happen." Might want to print an error message.
|
||
abort() is not out of the question, but chances are GDB is just
|
||
a bit confused, not unusable. */
|
||
#define err BPSTAT_WHAT_STOP_NOISY
|
||
|
||
/* Given an old action and a class, come up with a new action. */
|
||
/* One interesting property of this table is that wp_silent is the same
|
||
as bp_silent and wp_noisy is the same as bp_noisy. That is because
|
||
after stopping, the check for whether to step over a breakpoint
|
||
(BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
|
||
reference to how we stopped. We retain separate wp_silent and bp_silent
|
||
codes in case we want to change that someday. */
|
||
|
||
/* step_resume entries: a step resume breakpoint overrides another
|
||
breakpoint of signal handling (see comment in wait_for_inferior
|
||
at first IN_SIGTRAMP where we set the step_resume breakpoint). */
|
||
/* We handle the through_sigtramp_breakpoint the same way; having both
|
||
one of those and a step_resume_breakpoint is probably very rare (?). */
|
||
|
||
static const enum bpstat_what_main_action
|
||
table[(int)class_last][(int)BPSTAT_WHAT_LAST] =
|
||
{
|
||
/* old action */
|
||
/* kc ss sn sgl slr clr clrs sr ts shl shlr
|
||
*/
|
||
/*no_effect*/ {kc, ss, sn, sgl, slr, clr, clrs, sr, ts, shl, shlr},
|
||
/*wp_silent*/ {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
|
||
/*wp_noisy*/ {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
|
||
/*bp_nostop*/ {sgl, ss, sn, sgl, slr, clrs, clrs, sr, ts, shl, shlr},
|
||
/*bp_silent*/ {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
|
||
/*bp_noisy*/ {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
|
||
/*long_jump*/ {slr, ss, sn, slr, err, err, err, sr, ts, shl, shlr},
|
||
/*long_resume*/ {clr, ss, sn, clrs, err, err, err, sr, ts, shl, shlr},
|
||
/*step_resume*/ {sr, sr, sr, sr, sr, sr, sr, sr, ts, shl, shlr},
|
||
/*through_sig*/ {ts, ts, ts, ts, ts, ts, ts, ts, ts, shl, shlr},
|
||
/*shlib*/ {shl, shl, shl, shl, shl, shl, shl, shl, ts, shl, shlr},
|
||
/*catch_shlib*/ {shlr, shlr, shlr, shlr, shlr, shlr, shlr, shlr, ts, shlr, shlr}
|
||
};
|
||
|
||
#undef kc
|
||
#undef ss
|
||
#undef sn
|
||
#undef sgl
|
||
#undef slr
|
||
#undef clr
|
||
#undef clrs
|
||
#undef err
|
||
#undef sr
|
||
#undef ts
|
||
#undef shl
|
||
#undef shlr
|
||
enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
|
||
struct bpstat_what retval;
|
||
|
||
retval.call_dummy = 0;
|
||
for (; bs != NULL; bs = bs->next)
|
||
{
|
||
enum class bs_class = no_effect;
|
||
if (bs->breakpoint_at == NULL)
|
||
/* I suspect this can happen if it was a momentary breakpoint
|
||
which has since been deleted. */
|
||
continue;
|
||
switch (bs->breakpoint_at->type)
|
||
{
|
||
case bp_none:
|
||
continue;
|
||
|
||
case bp_breakpoint:
|
||
case bp_hardware_breakpoint:
|
||
case bp_until:
|
||
case bp_finish:
|
||
if (bs->stop)
|
||
{
|
||
if (bs->print)
|
||
bs_class = bp_noisy;
|
||
else
|
||
bs_class = bp_silent;
|
||
}
|
||
else
|
||
bs_class = bp_nostop;
|
||
break;
|
||
case bp_watchpoint:
|
||
case bp_hardware_watchpoint:
|
||
case bp_read_watchpoint:
|
||
case bp_access_watchpoint:
|
||
if (bs->stop)
|
||
{
|
||
if (bs->print)
|
||
bs_class = wp_noisy;
|
||
else
|
||
bs_class = wp_silent;
|
||
}
|
||
else
|
||
/* There was a watchpoint, but we're not stopping. This requires
|
||
no further action. */
|
||
bs_class = no_effect;
|
||
break;
|
||
case bp_longjmp:
|
||
bs_class = long_jump;
|
||
break;
|
||
case bp_longjmp_resume:
|
||
bs_class = long_resume;
|
||
break;
|
||
case bp_step_resume:
|
||
if (bs->stop)
|
||
{
|
||
bs_class = step_resume;
|
||
}
|
||
else
|
||
/* It is for the wrong frame. */
|
||
bs_class = bp_nostop;
|
||
break;
|
||
case bp_through_sigtramp:
|
||
bs_class = through_sig;
|
||
break;
|
||
case bp_watchpoint_scope:
|
||
bs_class = bp_nostop;
|
||
break;
|
||
case bp_shlib_event:
|
||
bs_class = shlib_event;
|
||
break;
|
||
case bp_catch_load:
|
||
case bp_catch_unload:
|
||
/* Only if this catchpoint triggered should we cause the
|
||
step-out-of-dld behaviour. Otherwise, we ignore this
|
||
catchpoint. */
|
||
if (bs->stop)
|
||
bs_class = catch_shlib_event;
|
||
else
|
||
bs_class = no_effect;
|
||
break;
|
||
case bp_catch_fork:
|
||
case bp_catch_vfork:
|
||
case bp_catch_exec:
|
||
if (bs->stop)
|
||
{
|
||
if (bs->print)
|
||
bs_class = bp_noisy;
|
||
else
|
||
bs_class = bp_silent;
|
||
}
|
||
else
|
||
/* There was a catchpoint, but we're not stopping. This requires
|
||
no further action. */
|
||
bs_class = no_effect;
|
||
break;
|
||
case bp_catch_catch:
|
||
if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_CATCH)
|
||
bs_class = bp_nostop;
|
||
else if (bs->stop)
|
||
bs_class = bs->print ? bp_noisy : bp_silent;
|
||
break;
|
||
case bp_catch_throw:
|
||
if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_THROW)
|
||
bs_class = bp_nostop;
|
||
else if (bs->stop)
|
||
bs_class = bs->print ? bp_noisy : bp_silent;
|
||
break;
|
||
case bp_call_dummy:
|
||
/* Make sure the action is stop (silent or noisy), so infrun.c
|
||
pops the dummy frame. */
|
||
bs_class = bp_silent;
|
||
retval.call_dummy = 1;
|
||
break;
|
||
}
|
||
current_action = table[(int)bs_class][(int)current_action];
|
||
}
|
||
retval.main_action = current_action;
|
||
return retval;
|
||
}
|
||
|
||
/* Nonzero if we should step constantly (e.g. watchpoints on machines
|
||
without hardware support). This isn't related to a specific bpstat,
|
||
just to things like whether watchpoints are set. */
|
||
|
||
int
|
||
bpstat_should_step ()
|
||
{
|
||
struct breakpoint *b;
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->enable == enabled && b->type == bp_watchpoint)
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
/* Nonzero if there are enabled hardware watchpoints. */
|
||
int
|
||
bpstat_have_active_hw_watchpoints ()
|
||
{
|
||
struct breakpoint *b;
|
||
ALL_BREAKPOINTS (b)
|
||
if ((b->enable == enabled) &&
|
||
(b->inserted) &&
|
||
((b->type == bp_hardware_watchpoint) ||
|
||
(b->type == bp_read_watchpoint) ||
|
||
(b->type == bp_access_watchpoint)))
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Given a bpstat that records zero or more triggered eventpoints, this
|
||
function returns another bpstat which contains only the catchpoints
|
||
on that first list, if any. */
|
||
void
|
||
bpstat_get_triggered_catchpoints (ep_list, cp_list)
|
||
bpstat ep_list;
|
||
bpstat * cp_list;
|
||
{
|
||
struct bpstats root_bs[1];
|
||
bpstat bs = root_bs;
|
||
struct breakpoint * ep;
|
||
char * dll_pathname;
|
||
|
||
bpstat_clear (cp_list);
|
||
root_bs->next = NULL;
|
||
|
||
for (; ep_list != NULL; ep_list = ep_list->next )
|
||
{
|
||
/* Is this eventpoint a catchpoint? If not, ignore it. */
|
||
ep = ep_list->breakpoint_at;
|
||
if (ep == NULL)
|
||
break;
|
||
if ((ep->type != bp_catch_load) &&
|
||
(ep->type != bp_catch_unload) &&
|
||
(ep->type != bp_catch_catch) &&
|
||
(ep->type != bp_catch_throw)) /* pai: (temp) ADD fork/vfork here!! */
|
||
continue;
|
||
|
||
/* Yes; add it to the list. */
|
||
bs = bpstat_alloc (ep, bs);
|
||
*bs = *ep_list;
|
||
bs->next = NULL;
|
||
bs = root_bs->next;
|
||
|
||
#if defined(SOLIB_ADD)
|
||
/* Also, for each triggered catchpoint, tag it with the name of
|
||
the library that caused this trigger. (We copy the name now,
|
||
because it's only guaranteed to be available NOW, when the
|
||
catchpoint triggers. Clients who may wish to know the name
|
||
later must get it from the catchpoint itself.) */
|
||
if (ep->triggered_dll_pathname != NULL)
|
||
free (ep->triggered_dll_pathname);
|
||
if (ep->type == bp_catch_load)
|
||
dll_pathname = SOLIB_LOADED_LIBRARY_PATHNAME (inferior_pid);
|
||
else
|
||
dll_pathname = SOLIB_UNLOADED_LIBRARY_PATHNAME (inferior_pid);
|
||
#else
|
||
dll_pathname = NULL;
|
||
#endif
|
||
if (dll_pathname)
|
||
{
|
||
ep->triggered_dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1);
|
||
strcpy (ep->triggered_dll_pathname, dll_pathname);
|
||
}
|
||
else
|
||
ep->triggered_dll_pathname = NULL;
|
||
}
|
||
|
||
*cp_list = bs;
|
||
}
|
||
|
||
/* Print information on breakpoint number BNUM, or -1 if all.
|
||
If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS
|
||
is nonzero, process only watchpoints. */
|
||
|
||
typedef struct {
|
||
enum bptype type;
|
||
char * description;
|
||
} ep_type_description_t;
|
||
|
||
static void
|
||
breakpoint_1 (bnum, allflag)
|
||
int bnum;
|
||
int allflag;
|
||
{
|
||
register struct breakpoint *b;
|
||
register struct command_line *l;
|
||
register struct symbol *sym;
|
||
CORE_ADDR last_addr = (CORE_ADDR)-1;
|
||
int found_a_breakpoint = 0;
|
||
static ep_type_description_t bptypes[] =
|
||
{
|
||
{bp_none, "?deleted?"},
|
||
{bp_breakpoint, "breakpoint"},
|
||
{bp_hardware_breakpoint, "hw breakpoint"},
|
||
{bp_until, "until"},
|
||
{bp_finish, "finish"},
|
||
{bp_watchpoint, "watchpoint"},
|
||
{bp_hardware_watchpoint, "hw watchpoint"},
|
||
{bp_read_watchpoint, "read watchpoint"},
|
||
{bp_access_watchpoint, "acc watchpoint"},
|
||
{bp_longjmp, "longjmp"},
|
||
{bp_longjmp_resume, "longjmp resume"},
|
||
{bp_step_resume, "step resume"},
|
||
{bp_through_sigtramp, "sigtramp"},
|
||
{bp_watchpoint_scope, "watchpoint scope"},
|
||
{bp_call_dummy, "call dummy"},
|
||
{bp_shlib_event, "shlib events"},
|
||
{bp_catch_load, "catch load"},
|
||
{bp_catch_unload, "catch unload"},
|
||
{bp_catch_fork, "catch fork"},
|
||
{bp_catch_vfork, "catch vfork"},
|
||
{bp_catch_exec, "catch exec"},
|
||
{bp_catch_catch, "catch catch"},
|
||
{bp_catch_throw, "catch throw"}
|
||
};
|
||
|
||
static char *bpdisps[] = {"del", "dstp", "dis", "keep"};
|
||
static char bpenables[] = "nyn";
|
||
char wrap_indent[80];
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (bnum == -1
|
||
|| bnum == b->number)
|
||
{
|
||
/* We only print out user settable breakpoints unless the allflag is set. */
|
||
if (!allflag
|
||
&& b->type != bp_breakpoint
|
||
&& b->type != bp_catch_load
|
||
&& b->type != bp_catch_unload
|
||
&& b->type != bp_catch_fork
|
||
&& b->type != bp_catch_vfork
|
||
&& b->type != bp_catch_exec
|
||
&& b->type != bp_catch_catch
|
||
&& b->type != bp_catch_throw
|
||
&& b->type != bp_hardware_breakpoint
|
||
&& b->type != bp_watchpoint
|
||
&& b->type != bp_read_watchpoint
|
||
&& b->type != bp_access_watchpoint
|
||
&& b->type != bp_hardware_watchpoint)
|
||
continue;
|
||
|
||
if (!found_a_breakpoint++)
|
||
{
|
||
annotate_breakpoints_headers ();
|
||
|
||
annotate_field (0);
|
||
printf_filtered ("Num ");
|
||
annotate_field (1);
|
||
printf_filtered ("Type ");
|
||
annotate_field (2);
|
||
printf_filtered ("Disp ");
|
||
annotate_field (3);
|
||
printf_filtered ("Enb ");
|
||
if (addressprint)
|
||
{
|
||
annotate_field (4);
|
||
printf_filtered ("Address ");
|
||
}
|
||
annotate_field (5);
|
||
printf_filtered ("What\n");
|
||
|
||
annotate_breakpoints_table ();
|
||
}
|
||
|
||
annotate_record ();
|
||
annotate_field (0);
|
||
printf_filtered ("%-3d ", b->number);
|
||
annotate_field (1);
|
||
if ((int)b->type > (sizeof(bptypes)/sizeof(bptypes[0])))
|
||
error ("bptypes table does not describe type #%d.", (int)b->type);
|
||
if ((int)b->type != bptypes[(int)b->type].type)
|
||
error ("bptypes table does not describe type #%d?", (int)b->type);
|
||
printf_filtered ("%-14s ", bptypes[(int)b->type].description);
|
||
annotate_field (2);
|
||
printf_filtered ("%-4s ", bpdisps[(int)b->disposition]);
|
||
annotate_field (3);
|
||
printf_filtered ("%-3c ", bpenables[(int)b->enable]);
|
||
|
||
strcpy (wrap_indent, " ");
|
||
if (addressprint)
|
||
strcat (wrap_indent, " ");
|
||
switch (b->type)
|
||
{
|
||
case bp_watchpoint:
|
||
case bp_hardware_watchpoint:
|
||
case bp_read_watchpoint:
|
||
case bp_access_watchpoint:
|
||
/* Field 4, the address, is omitted (which makes the columns
|
||
not line up too nicely with the headers, but the effect
|
||
is relatively readable). */
|
||
annotate_field (5);
|
||
print_expression (b->exp, gdb_stdout);
|
||
break;
|
||
|
||
case bp_catch_load:
|
||
case bp_catch_unload:
|
||
/* Field 4, the address, is omitted (which makes the columns
|
||
not line up too nicely with the headers, but the effect
|
||
is relatively readable). */
|
||
annotate_field (5);
|
||
if (b->dll_pathname == NULL)
|
||
printf_filtered ("<any library> ");
|
||
else
|
||
printf_filtered ("library \"%s\" ", b->dll_pathname);
|
||
break;
|
||
|
||
case bp_catch_fork:
|
||
case bp_catch_vfork:
|
||
/* Field 4, the address, is omitted (which makes the columns
|
||
not line up too nicely with the headers, but the effect
|
||
is relatively readable). */
|
||
annotate_field (5);
|
||
if (b->forked_inferior_pid != 0)
|
||
printf_filtered ("process %d ", b->forked_inferior_pid);
|
||
break;
|
||
|
||
case bp_catch_exec:
|
||
/* Field 4, the address, is omitted (which makes the columns
|
||
not line up too nicely with the headers, but the effect
|
||
is relatively readable). */
|
||
annotate_field (5);
|
||
if (b->exec_pathname != NULL)
|
||
printf_filtered ("program \"%s\" ", b->exec_pathname);
|
||
break;
|
||
case bp_catch_catch:
|
||
/* Field 4, the address, is omitted (which makes the columns
|
||
not line up too nicely with the headers, but the effect
|
||
is relatively readable). */
|
||
annotate_field (5);
|
||
printf_filtered ("exception catch ");
|
||
break;
|
||
case bp_catch_throw:
|
||
/* Field 4, the address, is omitted (which makes the columns
|
||
not line up too nicely with the headers, but the effect
|
||
is relatively readable). */
|
||
annotate_field (5);
|
||
printf_filtered ("exception throw ");
|
||
break;
|
||
|
||
case bp_breakpoint:
|
||
case bp_hardware_breakpoint:
|
||
case bp_until:
|
||
case bp_finish:
|
||
case bp_longjmp:
|
||
case bp_longjmp_resume:
|
||
case bp_step_resume:
|
||
case bp_through_sigtramp:
|
||
case bp_watchpoint_scope:
|
||
case bp_call_dummy:
|
||
case bp_shlib_event:
|
||
if (addressprint)
|
||
{
|
||
annotate_field (4);
|
||
/* FIXME-32x64: need a print_address_numeric with
|
||
field width */
|
||
printf_filtered
|
||
("%s ",
|
||
local_hex_string_custom
|
||
((unsigned long) b->address, "08l"));
|
||
}
|
||
|
||
annotate_field (5);
|
||
|
||
last_addr = b->address;
|
||
if (b->source_file)
|
||
{
|
||
sym = find_pc_sect_function (b->address, b->section);
|
||
if (sym)
|
||
{
|
||
fputs_filtered ("in ", gdb_stdout);
|
||
fputs_filtered (SYMBOL_SOURCE_NAME (sym), gdb_stdout);
|
||
wrap_here (wrap_indent);
|
||
fputs_filtered (" at ", gdb_stdout);
|
||
}
|
||
fputs_filtered (b->source_file, gdb_stdout);
|
||
printf_filtered (":%d", b->line_number);
|
||
}
|
||
else
|
||
print_address_symbolic (b->address, gdb_stdout, demangle, " ");
|
||
break;
|
||
}
|
||
|
||
if (b->thread != -1)
|
||
printf_filtered (" thread %d", b->thread );
|
||
|
||
printf_filtered ("\n");
|
||
|
||
if (b->frame)
|
||
{
|
||
annotate_field (6);
|
||
|
||
printf_filtered ("\tstop only in stack frame at ");
|
||
print_address_numeric (b->frame, 1, gdb_stdout);
|
||
printf_filtered ("\n");
|
||
}
|
||
|
||
if (b->cond)
|
||
{
|
||
annotate_field (7);
|
||
|
||
printf_filtered ("\tstop only if ");
|
||
print_expression (b->cond, gdb_stdout);
|
||
printf_filtered ("\n");
|
||
}
|
||
|
||
if (b->thread != -1)
|
||
{
|
||
/* FIXME should make an annotation for this */
|
||
printf_filtered ("\tstop only in thread %d\n", b->thread);
|
||
}
|
||
|
||
if (show_breakpoint_hit_counts && b->hit_count)
|
||
{
|
||
/* FIXME should make an annotation for this */
|
||
if (ep_is_catchpoint (b))
|
||
printf_filtered ("\tcatchpoint");
|
||
else
|
||
printf_filtered ("\tbreakpoint");
|
||
printf_filtered (" already hit %d time%s\n",
|
||
b->hit_count, (b->hit_count == 1 ? "" : "s"));
|
||
}
|
||
|
||
if (b->ignore_count)
|
||
{
|
||
annotate_field (8);
|
||
|
||
printf_filtered ("\tignore next %d hits\n", b->ignore_count);
|
||
}
|
||
|
||
if ((l = b->commands))
|
||
{
|
||
annotate_field (9);
|
||
|
||
while (l)
|
||
{
|
||
print_command_line (l, 4);
|
||
l = l->next;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (!found_a_breakpoint)
|
||
{
|
||
if (bnum == -1)
|
||
printf_filtered ("No breakpoints or watchpoints.\n");
|
||
else
|
||
printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum);
|
||
}
|
||
else
|
||
/* Compare against (CORE_ADDR)-1 in case some compiler decides
|
||
that a comparison of an unsigned with -1 is always false. */
|
||
if (last_addr != (CORE_ADDR)-1)
|
||
set_next_address (last_addr);
|
||
|
||
annotate_breakpoints_table_end ();
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
breakpoints_info (bnum_exp, from_tty)
|
||
char *bnum_exp;
|
||
int from_tty;
|
||
{
|
||
int bnum = -1;
|
||
|
||
if (bnum_exp)
|
||
bnum = parse_and_eval_address (bnum_exp);
|
||
|
||
breakpoint_1 (bnum, 0);
|
||
}
|
||
|
||
#if MAINTENANCE_CMDS
|
||
|
||
/* ARGSUSED */
|
||
void
|
||
maintenance_info_breakpoints (bnum_exp, from_tty)
|
||
char *bnum_exp;
|
||
int from_tty;
|
||
{
|
||
int bnum = -1;
|
||
|
||
if (bnum_exp)
|
||
bnum = parse_and_eval_address (bnum_exp);
|
||
|
||
breakpoint_1 (bnum, 1);
|
||
}
|
||
|
||
#endif
|
||
|
||
/* Print a message describing any breakpoints set at PC. */
|
||
|
||
static void
|
||
describe_other_breakpoints (pc, section)
|
||
CORE_ADDR pc;
|
||
asection *section;
|
||
{
|
||
register int others = 0;
|
||
register struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->address == pc)
|
||
if (overlay_debugging == 0 ||
|
||
b->section == section)
|
||
others++;
|
||
if (others > 0)
|
||
{
|
||
printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : "");
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->address == pc)
|
||
if (overlay_debugging == 0 ||
|
||
b->section == section)
|
||
{
|
||
others--;
|
||
printf_filtered
|
||
("%d%s%s ",
|
||
b->number,
|
||
((b->enable == disabled || b->enable == shlib_disabled || b->enable == call_disabled)
|
||
? " (disabled)" : ""),
|
||
(others > 1) ? "," : ((others == 1) ? " and" : ""));
|
||
}
|
||
printf_filtered ("also set at pc ");
|
||
print_address_numeric (pc, 1, gdb_stdout);
|
||
printf_filtered (".\n");
|
||
}
|
||
}
|
||
|
||
/* Set the default place to put a breakpoint
|
||
for the `break' command with no arguments. */
|
||
|
||
void
|
||
set_default_breakpoint (valid, addr, symtab, line)
|
||
int valid;
|
||
CORE_ADDR addr;
|
||
struct symtab *symtab;
|
||
int line;
|
||
{
|
||
default_breakpoint_valid = valid;
|
||
default_breakpoint_address = addr;
|
||
default_breakpoint_symtab = symtab;
|
||
default_breakpoint_line = line;
|
||
}
|
||
|
||
/* Rescan breakpoints at address ADDRESS,
|
||
marking the first one as "first" and any others as "duplicates".
|
||
This is so that the bpt instruction is only inserted once. */
|
||
|
||
static void
|
||
check_duplicates (address, section)
|
||
CORE_ADDR address;
|
||
asection *section;
|
||
{
|
||
register struct breakpoint *b;
|
||
register int count = 0;
|
||
|
||
if (address == 0) /* Watchpoints are uninteresting */
|
||
return;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->enable != disabled
|
||
&& b->enable != shlib_disabled
|
||
&& b->enable != call_disabled
|
||
&& b->address == address
|
||
&& (overlay_debugging == 0 || b->section == section))
|
||
{
|
||
count++;
|
||
b->duplicate = count > 1;
|
||
}
|
||
}
|
||
|
||
/* Low level routine to set a breakpoint.
|
||
Takes as args the three things that every breakpoint must have.
|
||
Returns the breakpoint object so caller can set other things.
|
||
Does not set the breakpoint number!
|
||
Does not print anything.
|
||
|
||
==> This routine should not be called if there is a chance of later
|
||
error(); otherwise it leaves a bogus breakpoint on the chain. Validate
|
||
your arguments BEFORE calling this routine! */
|
||
|
||
struct breakpoint *
|
||
set_raw_breakpoint (sal)
|
||
struct symtab_and_line sal;
|
||
{
|
||
register struct breakpoint *b, *b1;
|
||
|
||
b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint));
|
||
memset (b, 0, sizeof (*b));
|
||
b->address = sal.pc;
|
||
if (sal.symtab == NULL)
|
||
b->source_file = NULL;
|
||
else
|
||
b->source_file = savestring (sal.symtab->filename,
|
||
strlen (sal.symtab->filename));
|
||
b->section = sal.section;
|
||
b->language = current_language->la_language;
|
||
b->input_radix = input_radix;
|
||
b->thread = -1;
|
||
b->line_number = sal.line;
|
||
b->enable = enabled;
|
||
b->next = 0;
|
||
b->silent = 0;
|
||
b->ignore_count = 0;
|
||
b->commands = NULL;
|
||
b->frame = 0;
|
||
b->dll_pathname = NULL;
|
||
b->triggered_dll_pathname = NULL;
|
||
b->forked_inferior_pid = 0;
|
||
b->exec_pathname = NULL;
|
||
|
||
/* Add this breakpoint to the end of the chain
|
||
so that a list of breakpoints will come out in order
|
||
of increasing numbers. */
|
||
|
||
b1 = breakpoint_chain;
|
||
if (b1 == 0)
|
||
breakpoint_chain = b;
|
||
else
|
||
{
|
||
while (b1->next)
|
||
b1 = b1->next;
|
||
b1->next = b;
|
||
}
|
||
|
||
check_duplicates (sal.pc, sal.section);
|
||
breakpoints_changed ();
|
||
|
||
return b;
|
||
}
|
||
|
||
#ifdef GET_LONGJMP_TARGET
|
||
|
||
static void
|
||
create_longjmp_breakpoint (func_name)
|
||
char *func_name;
|
||
{
|
||
struct symtab_and_line sal;
|
||
struct breakpoint *b;
|
||
|
||
INIT_SAL (&sal); /* initialize to zeroes */
|
||
if (func_name != NULL)
|
||
{
|
||
struct minimal_symbol *m;
|
||
|
||
m = lookup_minimal_symbol_text (func_name, NULL, (struct objfile *)NULL);
|
||
if (m)
|
||
sal.pc = SYMBOL_VALUE_ADDRESS (m);
|
||
else
|
||
return;
|
||
}
|
||
sal.section = find_pc_overlay (sal.pc);
|
||
b = set_raw_breakpoint (sal);
|
||
if (!b) return;
|
||
|
||
b->type = func_name != NULL ? bp_longjmp : bp_longjmp_resume;
|
||
b->disposition = donttouch;
|
||
b->enable = disabled;
|
||
b->silent = 1;
|
||
if (func_name)
|
||
b->addr_string = strsave(func_name);
|
||
b->number = internal_breakpoint_number--;
|
||
}
|
||
|
||
#endif /* #ifdef GET_LONGJMP_TARGET */
|
||
|
||
/* Call this routine when stepping and nexting to enable a breakpoint if we do
|
||
a longjmp(). When we hit that breakpoint, call
|
||
set_longjmp_resume_breakpoint() to figure out where we are going. */
|
||
|
||
void
|
||
enable_longjmp_breakpoint()
|
||
{
|
||
register struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->type == bp_longjmp)
|
||
{
|
||
b->enable = enabled;
|
||
check_duplicates (b->address, b->section);
|
||
}
|
||
}
|
||
|
||
void
|
||
disable_longjmp_breakpoint()
|
||
{
|
||
register struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if ( b->type == bp_longjmp
|
||
|| b->type == bp_longjmp_resume)
|
||
{
|
||
b->enable = disabled;
|
||
check_duplicates (b->address, b->section);
|
||
}
|
||
}
|
||
|
||
#ifdef SOLIB_ADD
|
||
void
|
||
remove_solib_event_breakpoints ()
|
||
{
|
||
register struct breakpoint *b, *temp;
|
||
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
if (b->type == bp_shlib_event)
|
||
delete_breakpoint (b);
|
||
}
|
||
|
||
void
|
||
create_solib_event_breakpoint (address)
|
||
CORE_ADDR address;
|
||
{
|
||
struct breakpoint *b;
|
||
struct symtab_and_line sal;
|
||
|
||
INIT_SAL (&sal); /* initialize to zeroes */
|
||
sal.pc = address;
|
||
sal.section = find_pc_overlay (sal.pc);
|
||
b = set_raw_breakpoint (sal);
|
||
b->number = internal_breakpoint_number--;
|
||
b->disposition = donttouch;
|
||
b->type = bp_shlib_event;
|
||
}
|
||
|
||
void
|
||
disable_breakpoints_in_shlibs ()
|
||
{
|
||
struct breakpoint * b;
|
||
int disabled_shlib_breaks = 0;
|
||
|
||
/* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
#if defined (PC_SOLIB)
|
||
if (((b->type == bp_breakpoint) ||
|
||
(b->type == bp_hardware_breakpoint)) &&
|
||
(b->enable != shlib_disabled) &&
|
||
(b->enable != call_disabled) &&
|
||
! b->duplicate &&
|
||
PC_SOLIB (b->address))
|
||
{
|
||
b->enable = shlib_disabled;
|
||
if (!disabled_shlib_breaks)
|
||
{
|
||
target_terminal_ours_for_output ();
|
||
printf_filtered ("Temporarily disabling shared library breakpoints:\n");
|
||
}
|
||
disabled_shlib_breaks = 1;
|
||
printf_filtered ("%d ", b->number);
|
||
}
|
||
#endif
|
||
}
|
||
if (disabled_shlib_breaks)
|
||
printf_filtered ("\n");
|
||
}
|
||
|
||
/* Try to reenable any breakpoints in shared libraries. */
|
||
void
|
||
re_enable_breakpoints_in_shlibs ()
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->enable == shlib_disabled)
|
||
{
|
||
char buf[1];
|
||
|
||
/* Do not reenable the breakpoint if the shared library
|
||
is still not mapped in. */
|
||
if (target_read_memory (b->address, buf, 1) == 0)
|
||
b->enable = enabled;
|
||
}
|
||
}
|
||
|
||
#endif
|
||
|
||
static void
|
||
create_solib_load_unload_event_breakpoint (hookname, tempflag, dll_pathname, cond_string, bp_kind)
|
||
char * hookname;
|
||
int tempflag;
|
||
char * dll_pathname;
|
||
char * cond_string;
|
||
enum bptype bp_kind;
|
||
{
|
||
struct breakpoint * b;
|
||
struct symtabs_and_lines sals;
|
||
struct symtab_and_line sal;
|
||
struct cleanup * old_chain;
|
||
struct cleanup * canonical_strings_chain = NULL;
|
||
int i;
|
||
char * addr_start = hookname;
|
||
char * addr_end = NULL;
|
||
char ** canonical = (char **) NULL;
|
||
int thread = -1; /* All threads. */
|
||
|
||
/* Set a breakpoint on the specified hook. */
|
||
sals = decode_line_1 (&hookname, 1, (struct symtab *) NULL, 0, &canonical);
|
||
addr_end = hookname;
|
||
|
||
if (sals.nelts == 0)
|
||
{
|
||
warning ("Unable to set a breakpoint on dynamic linker callback.");
|
||
warning ("Suggest linking with /opt/langtools/lib/end.o.");
|
||
warning ("GDB will be unable to track shl_load/shl_unload calls");
|
||
return;
|
||
}
|
||
if (sals.nelts != 1)
|
||
{
|
||
warning ("Unable to set a unique breakpoint on dynamic linker callback.");
|
||
warning ("GDB will be unable to track shl_load/shl_unload calls");
|
||
return;
|
||
}
|
||
|
||
/* Make sure that all storage allocated in decode_line_1 gets freed in case
|
||
the following errors out. */
|
||
old_chain = make_cleanup (free, sals.sals);
|
||
if (canonical != (char **)NULL)
|
||
{
|
||
make_cleanup (free, canonical);
|
||
canonical_strings_chain = make_cleanup (null_cleanup, 0);
|
||
if (canonical[0] != NULL)
|
||
make_cleanup (free, canonical[0]);
|
||
}
|
||
|
||
resolve_sal_pc (&sals.sals[0]);
|
||
|
||
/* Remove the canonical strings from the cleanup, they are needed below. */
|
||
if (canonical != (char **)NULL)
|
||
discard_cleanups (canonical_strings_chain);
|
||
|
||
b = set_raw_breakpoint (sals.sals[0]);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->cond = NULL;
|
||
b->cond_string = (cond_string == NULL) ? NULL : savestring (cond_string, strlen (cond_string));
|
||
b->thread = thread;
|
||
|
||
if (canonical != (char **)NULL && canonical[0] != NULL)
|
||
b->addr_string = canonical[0];
|
||
else if (addr_start)
|
||
b->addr_string = savestring (addr_start, addr_end - addr_start);
|
||
|
||
b->enable = enabled;
|
||
b->disposition = tempflag ? del : donttouch;
|
||
|
||
if (dll_pathname == NULL)
|
||
b->dll_pathname = NULL;
|
||
else
|
||
{
|
||
b->dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1);
|
||
strcpy (b->dll_pathname, dll_pathname);
|
||
}
|
||
b->type = bp_kind;
|
||
|
||
mention (b);
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
void
|
||
create_solib_load_event_breakpoint (hookname, tempflag, dll_pathname, cond_string)
|
||
char * hookname;
|
||
int tempflag;
|
||
char * dll_pathname;
|
||
char * cond_string;
|
||
{
|
||
create_solib_load_unload_event_breakpoint (hookname,
|
||
tempflag,
|
||
dll_pathname,
|
||
cond_string,
|
||
bp_catch_load);
|
||
}
|
||
|
||
void
|
||
create_solib_unload_event_breakpoint (hookname, tempflag, dll_pathname, cond_string)
|
||
char * hookname;
|
||
int tempflag;
|
||
char * dll_pathname;
|
||
char * cond_string;
|
||
{
|
||
create_solib_load_unload_event_breakpoint (hookname,
|
||
tempflag,
|
||
dll_pathname,
|
||
cond_string,
|
||
bp_catch_unload);
|
||
}
|
||
|
||
static void
|
||
create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_kind)
|
||
int tempflag;
|
||
char * cond_string;
|
||
enum bptype bp_kind;
|
||
{
|
||
struct symtab_and_line sal;
|
||
struct breakpoint * b;
|
||
int thread = -1; /* All threads. */
|
||
|
||
INIT_SAL(&sal);
|
||
sal.pc = 0;
|
||
sal.symtab = NULL;
|
||
sal.line = 0;
|
||
|
||
b = set_raw_breakpoint (sal);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->cond = NULL;
|
||
b->cond_string = (cond_string == NULL) ? NULL : savestring (cond_string, strlen (cond_string));
|
||
b->thread = thread;
|
||
b->addr_string = NULL;
|
||
b->enable = enabled;
|
||
b->disposition = tempflag ? del : donttouch;
|
||
b->forked_inferior_pid = 0;
|
||
|
||
b->type = bp_kind;
|
||
|
||
mention (b);
|
||
}
|
||
|
||
void
|
||
create_fork_event_catchpoint (tempflag, cond_string)
|
||
int tempflag;
|
||
char * cond_string;
|
||
{
|
||
create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_fork);
|
||
}
|
||
|
||
void
|
||
create_vfork_event_catchpoint (tempflag, cond_string)
|
||
int tempflag;
|
||
char * cond_string;
|
||
{
|
||
create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_vfork);
|
||
}
|
||
|
||
void
|
||
create_exec_event_catchpoint (tempflag, cond_string)
|
||
int tempflag;
|
||
char * cond_string;
|
||
{
|
||
struct symtab_and_line sal;
|
||
struct breakpoint * b;
|
||
int thread = -1; /* All threads. */
|
||
|
||
INIT_SAL(&sal);
|
||
sal.pc = 0;
|
||
sal.symtab = NULL;
|
||
sal.line = 0;
|
||
|
||
b = set_raw_breakpoint (sal);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->cond = NULL;
|
||
b->cond_string = (cond_string == NULL) ? NULL : savestring (cond_string, strlen (cond_string));
|
||
b->thread = thread;
|
||
b->addr_string = NULL;
|
||
b->enable = enabled;
|
||
b->disposition = tempflag ? del : donttouch;
|
||
|
||
b->type = bp_catch_exec;
|
||
|
||
mention (b);
|
||
}
|
||
|
||
static int
|
||
hw_breakpoint_used_count()
|
||
{
|
||
register struct breakpoint *b;
|
||
int i = 0;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->type == bp_hardware_breakpoint && b->enable == enabled)
|
||
i++;
|
||
}
|
||
|
||
return i;
|
||
}
|
||
|
||
static int
|
||
hw_watchpoint_used_count(type, other_type_used)
|
||
enum bptype type;
|
||
int *other_type_used;
|
||
{
|
||
register struct breakpoint *b;
|
||
int i = 0;
|
||
|
||
*other_type_used = 0;
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->enable == enabled)
|
||
{
|
||
if (b->type == type) i++;
|
||
else if ((b->type == bp_hardware_watchpoint ||
|
||
b->type == bp_read_watchpoint ||
|
||
b->type == bp_access_watchpoint)
|
||
&& b->enable == enabled)
|
||
*other_type_used = 1;
|
||
}
|
||
}
|
||
return i;
|
||
}
|
||
|
||
/* Call this after hitting the longjmp() breakpoint. Use this to set a new
|
||
breakpoint at the target of the jmp_buf.
|
||
|
||
FIXME - This ought to be done by setting a temporary breakpoint that gets
|
||
deleted automatically... */
|
||
|
||
void
|
||
set_longjmp_resume_breakpoint(pc, frame)
|
||
CORE_ADDR pc;
|
||
struct frame_info *frame;
|
||
{
|
||
register struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->type == bp_longjmp_resume)
|
||
{
|
||
b->address = pc;
|
||
b->enable = enabled;
|
||
if (frame != NULL)
|
||
b->frame = frame->frame;
|
||
else
|
||
b->frame = 0;
|
||
check_duplicates (b->address, b->section);
|
||
return;
|
||
}
|
||
}
|
||
|
||
void
|
||
disable_watchpoints_before_interactive_call_start ()
|
||
{
|
||
struct breakpoint * b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (((b->type == bp_watchpoint)
|
||
|| (b->type == bp_hardware_watchpoint)
|
||
|| (b->type == bp_read_watchpoint)
|
||
|| (b->type == bp_access_watchpoint)
|
||
|| ep_is_exception_catchpoint (b))
|
||
&& (b->enable == enabled))
|
||
{
|
||
b->enable = call_disabled;
|
||
check_duplicates (b->address, b->section);
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
enable_watchpoints_after_interactive_call_stop ()
|
||
{
|
||
struct breakpoint * b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (((b->type == bp_watchpoint)
|
||
|| (b->type == bp_hardware_watchpoint)
|
||
|| (b->type == bp_read_watchpoint)
|
||
|| (b->type == bp_access_watchpoint)
|
||
|| ep_is_exception_catchpoint (b))
|
||
&& (b->enable == call_disabled))
|
||
{
|
||
b->enable = enabled;
|
||
check_duplicates (b->address, b->section);
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
/* Set a breakpoint that will evaporate an end of command
|
||
at address specified by SAL.
|
||
Restrict it to frame FRAME if FRAME is nonzero. */
|
||
|
||
struct breakpoint *
|
||
set_momentary_breakpoint (sal, frame, type)
|
||
struct symtab_and_line sal;
|
||
struct frame_info *frame;
|
||
enum bptype type;
|
||
{
|
||
register struct breakpoint *b;
|
||
b = set_raw_breakpoint (sal);
|
||
b->type = type;
|
||
b->enable = enabled;
|
||
b->disposition = donttouch;
|
||
b->frame = (frame ? frame->frame : 0);
|
||
|
||
/* If we're debugging a multi-threaded program, then we
|
||
want momentary breakpoints to be active in only a
|
||
single thread of control. */
|
||
if (in_thread_list (inferior_pid))
|
||
b->thread = pid_to_thread_id (inferior_pid);
|
||
|
||
return b;
|
||
}
|
||
|
||
|
||
/* Tell the user we have just set a breakpoint B. */
|
||
|
||
static void
|
||
mention (b)
|
||
struct breakpoint *b;
|
||
{
|
||
int say_where = 0;
|
||
|
||
/* FIXME: This is misplaced; mention() is called by things (like hitting a
|
||
watchpoint) other than breakpoint creation. It should be possible to
|
||
clean this up and at the same time replace the random calls to
|
||
breakpoint_changed with this hook, as has already been done for
|
||
delete_breakpoint_hook and so on. */
|
||
if (create_breakpoint_hook)
|
||
create_breakpoint_hook (b);
|
||
|
||
switch (b->type)
|
||
{
|
||
case bp_none:
|
||
printf_filtered ("(apparently deleted?) Eventpoint %d: ", b->number);
|
||
break;
|
||
case bp_watchpoint:
|
||
printf_filtered ("Watchpoint %d: ", b->number);
|
||
print_expression (b->exp, gdb_stdout);
|
||
break;
|
||
case bp_hardware_watchpoint:
|
||
printf_filtered ("Hardware watchpoint %d: ", b->number);
|
||
print_expression (b->exp, gdb_stdout);
|
||
break;
|
||
case bp_read_watchpoint:
|
||
printf_filtered ("Hardware read watchpoint %d: ", b->number);
|
||
print_expression (b->exp, gdb_stdout);
|
||
break;
|
||
case bp_access_watchpoint:
|
||
printf_filtered ("Hardware access (read/write) watchpoint %d: ",b->number);
|
||
print_expression (b->exp, gdb_stdout);
|
||
break;
|
||
case bp_breakpoint:
|
||
printf_filtered ("Breakpoint %d", b->number);
|
||
say_where = 1;
|
||
break;
|
||
case bp_hardware_breakpoint:
|
||
printf_filtered ("Hardware assisted breakpoint %d", b->number);
|
||
say_where = 1;
|
||
break;
|
||
case bp_catch_load:
|
||
case bp_catch_unload:
|
||
printf_filtered ("Catchpoint %d (%s %s)",
|
||
b->number,
|
||
(b->type == bp_catch_load) ? "load" : "unload",
|
||
(b->dll_pathname != NULL) ? b->dll_pathname : "<any library>");
|
||
break;
|
||
case bp_catch_fork:
|
||
case bp_catch_vfork:
|
||
printf_filtered ("Catchpoint %d (%s)",
|
||
b->number,
|
||
(b->type == bp_catch_fork) ? "fork" : "vfork");
|
||
break;
|
||
case bp_catch_exec:
|
||
printf_filtered ("Catchpoint %d (exec)",
|
||
b->number);
|
||
break;
|
||
case bp_catch_catch:
|
||
case bp_catch_throw:
|
||
printf_filtered ("Catchpoint %d (%s)",
|
||
b->number,
|
||
(b->type == bp_catch_catch) ? "catch" : "throw");
|
||
break;
|
||
|
||
case bp_until:
|
||
case bp_finish:
|
||
case bp_longjmp:
|
||
case bp_longjmp_resume:
|
||
case bp_step_resume:
|
||
case bp_through_sigtramp:
|
||
case bp_call_dummy:
|
||
case bp_watchpoint_scope:
|
||
case bp_shlib_event:
|
||
break;
|
||
}
|
||
if (say_where)
|
||
{
|
||
if (addressprint || b->source_file == NULL)
|
||
{
|
||
printf_filtered (" at ");
|
||
print_address_numeric (b->address, 1, gdb_stdout);
|
||
}
|
||
if (b->source_file)
|
||
printf_filtered (": file %s, line %d.",
|
||
b->source_file, b->line_number);
|
||
TUIDO(((TuiOpaqueFuncPtr)tui_vAllSetHasBreakAt, b, 1));
|
||
TUIDO(((TuiOpaqueFuncPtr)tuiUpdateAllExecInfos));
|
||
}
|
||
printf_filtered ("\n");
|
||
}
|
||
|
||
|
||
/* Set a breakpoint according to ARG (function, linenum or *address)
|
||
flag: first bit : 0 non-temporary, 1 temporary.
|
||
second bit : 0 normal breakpoint, 1 hardware breakpoint. */
|
||
|
||
static void
|
||
break_command_1 (arg, flag, from_tty)
|
||
char *arg;
|
||
int flag, from_tty;
|
||
{
|
||
int tempflag, hardwareflag;
|
||
struct symtabs_and_lines sals;
|
||
struct symtab_and_line sal;
|
||
register struct expression *cond = 0;
|
||
register struct breakpoint *b;
|
||
|
||
/* Pointers in arg to the start, and one past the end, of the condition. */
|
||
char *cond_start = NULL;
|
||
char *cond_end = NULL;
|
||
/* Pointers in arg to the start, and one past the end,
|
||
of the address part. */
|
||
char *addr_start = NULL;
|
||
char *addr_end = NULL;
|
||
struct cleanup *old_chain;
|
||
struct cleanup *canonical_strings_chain = NULL;
|
||
char **canonical = (char **)NULL;
|
||
int i;
|
||
int thread;
|
||
|
||
hardwareflag = flag & BP_HARDWAREFLAG;
|
||
tempflag = flag & BP_TEMPFLAG;
|
||
|
||
sals.sals = NULL;
|
||
sals.nelts = 0;
|
||
|
||
INIT_SAL (&sal); /* initialize to zeroes */
|
||
|
||
/* If no arg given, or if first arg is 'if ', use the default breakpoint. */
|
||
|
||
if (!arg || (arg[0] == 'i' && arg[1] == 'f'
|
||
&& (arg[2] == ' ' || arg[2] == '\t')))
|
||
{
|
||
if (default_breakpoint_valid)
|
||
{
|
||
sals.sals = (struct symtab_and_line *)
|
||
xmalloc (sizeof (struct symtab_and_line));
|
||
sal.pc = default_breakpoint_address;
|
||
sal.line = default_breakpoint_line;
|
||
sal.symtab = default_breakpoint_symtab;
|
||
sal.section = find_pc_overlay (sal.pc);
|
||
sals.sals[0] = sal;
|
||
sals.nelts = 1;
|
||
}
|
||
else
|
||
error ("No default breakpoint address now.");
|
||
}
|
||
else
|
||
{
|
||
addr_start = arg;
|
||
|
||
/* Force almost all breakpoints to be in terms of the
|
||
current_source_symtab (which is decode_line_1's default). This
|
||
should produce the results we want almost all of the time while
|
||
leaving default_breakpoint_* alone. */
|
||
if (default_breakpoint_valid
|
||
&& (!current_source_symtab
|
||
|| (arg && (*arg == '+' || *arg == '-'))))
|
||
sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
|
||
default_breakpoint_line, &canonical);
|
||
else
|
||
sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, &canonical);
|
||
|
||
addr_end = arg;
|
||
}
|
||
|
||
if (! sals.nelts)
|
||
return;
|
||
|
||
/* Make sure that all storage allocated in decode_line_1 gets freed in case
|
||
the following `for' loop errors out. */
|
||
old_chain = make_cleanup (free, sals.sals);
|
||
if (canonical != (char **)NULL)
|
||
{
|
||
make_cleanup (free, canonical);
|
||
canonical_strings_chain = make_cleanup (null_cleanup, 0);
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
if (canonical[i] != NULL)
|
||
make_cleanup (free, canonical[i]);
|
||
}
|
||
}
|
||
|
||
thread = -1; /* No specific thread yet */
|
||
|
||
/* Resolve all line numbers to PC's, and verify that conditions
|
||
can be parsed, before setting any breakpoints. */
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
char *tok, *end_tok;
|
||
int toklen;
|
||
|
||
resolve_sal_pc (&sals.sals[i]);
|
||
|
||
/* It's possible for the PC to be nonzero, but still an illegal
|
||
value on some targets.
|
||
|
||
For example, on HP-UX if you start gdb, and before running the
|
||
inferior you try to set a breakpoint on a shared library function
|
||
"foo" where the inferior doesn't call "foo" directly but does
|
||
pass its address to another function call, then we do find a
|
||
minimal symbol for the "foo", but it's address is invalid.
|
||
(Appears to be an index into a table that the loader sets up
|
||
when the inferior is run.)
|
||
|
||
Give the target a chance to bless sals.sals[i].pc before we
|
||
try to make a breakpoint for it. */
|
||
if (PC_REQUIRES_RUN_BEFORE_USE(sals.sals[i].pc))
|
||
{
|
||
error ("Cannot break on %s without a running program.", addr_start);
|
||
}
|
||
|
||
tok = arg;
|
||
|
||
while (tok && *tok)
|
||
{
|
||
while (*tok == ' ' || *tok == '\t')
|
||
tok++;
|
||
|
||
end_tok = tok;
|
||
|
||
while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
|
||
end_tok++;
|
||
|
||
toklen = end_tok - tok;
|
||
|
||
if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
|
||
{
|
||
tok = cond_start = end_tok + 1;
|
||
cond = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
|
||
cond_end = tok;
|
||
}
|
||
else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
|
||
{
|
||
char *tmptok;
|
||
|
||
tok = end_tok + 1;
|
||
tmptok = tok;
|
||
thread = strtol (tok, &tok, 0);
|
||
if (tok == tmptok)
|
||
error ("Junk after thread keyword.");
|
||
if (!valid_thread_id (thread))
|
||
error ("Unknown thread %d\n", thread);
|
||
}
|
||
else
|
||
error ("Junk at end of arguments.");
|
||
}
|
||
}
|
||
if (hardwareflag)
|
||
{
|
||
int i, target_resources_ok;
|
||
|
||
i = hw_breakpoint_used_count ();
|
||
target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT (
|
||
bp_hardware_breakpoint, i + sals.nelts, 0);
|
||
if (target_resources_ok == 0)
|
||
error ("No hardware breakpoint support in the target.");
|
||
else if (target_resources_ok < 0)
|
||
error ("Hardware breakpoints used exceeds limit.");
|
||
}
|
||
|
||
/* Remove the canonical strings from the cleanup, they are needed below. */
|
||
if (canonical != (char **)NULL)
|
||
discard_cleanups (canonical_strings_chain);
|
||
|
||
/* Now set all the breakpoints. */
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
sal = sals.sals[i];
|
||
|
||
if (from_tty)
|
||
describe_other_breakpoints (sal.pc, sal.section);
|
||
|
||
b = set_raw_breakpoint (sal);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->type = hardwareflag ? bp_hardware_breakpoint : bp_breakpoint;
|
||
b->cond = cond;
|
||
b->thread = thread;
|
||
|
||
/* If a canonical line spec is needed use that instead of the
|
||
command string. */
|
||
if (canonical != (char **)NULL && canonical[i] != NULL)
|
||
b->addr_string = canonical[i];
|
||
else if (addr_start)
|
||
b->addr_string = savestring (addr_start, addr_end - addr_start);
|
||
if (cond_start)
|
||
b->cond_string = savestring (cond_start, cond_end - cond_start);
|
||
|
||
b->enable = enabled;
|
||
b->disposition = tempflag ? del : donttouch;
|
||
mention (b);
|
||
}
|
||
|
||
if (sals.nelts > 1)
|
||
{
|
||
printf_filtered ("Multiple breakpoints were set.\n");
|
||
printf_filtered ("Use the \"delete\" command to delete unwanted breakpoints.\n");
|
||
}
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
static void
|
||
break_at_finish_at_depth_command_1 (arg, flag, from_tty)
|
||
char *arg;
|
||
int flag;
|
||
int from_tty;
|
||
{
|
||
struct frame_info *frame;
|
||
CORE_ADDR low, high, selected_pc = 0;
|
||
char *extra_args, *level_arg, *addr_string;
|
||
int extra_args_len = 0, if_arg = 0;
|
||
|
||
if (!arg ||
|
||
(arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
|
||
{
|
||
|
||
if (default_breakpoint_valid)
|
||
{
|
||
if (selected_frame)
|
||
{
|
||
selected_pc = selected_frame->pc;
|
||
if (arg)
|
||
if_arg = 1;
|
||
}
|
||
else
|
||
error ("No selected frame.");
|
||
}
|
||
else
|
||
error ("No default breakpoint address now.");
|
||
}
|
||
else
|
||
{
|
||
extra_args = strchr (arg, ' ');
|
||
if (extra_args)
|
||
{
|
||
extra_args++;
|
||
extra_args_len = strlen (extra_args);
|
||
level_arg = (char *) xmalloc (extra_args - arg);
|
||
strncpy (level_arg, arg, extra_args - arg - 1);
|
||
level_arg[extra_args - arg - 1] = '\0';
|
||
}
|
||
else
|
||
{
|
||
level_arg = (char *) xmalloc (strlen (arg) + 1);
|
||
strcpy (level_arg, arg);
|
||
}
|
||
|
||
frame = parse_frame_specification (level_arg);
|
||
if (frame)
|
||
selected_pc = frame->pc;
|
||
else
|
||
selected_pc = 0;
|
||
}
|
||
if (if_arg)
|
||
{
|
||
extra_args = arg;
|
||
extra_args_len = strlen (arg);
|
||
}
|
||
|
||
if (selected_pc)
|
||
{
|
||
if (find_pc_partial_function(selected_pc, (char **)NULL, &low, &high))
|
||
{
|
||
addr_string = (char *) xmalloc (26 + extra_args_len);
|
||
if (extra_args_len)
|
||
sprintf (addr_string, "*0x%x %s", high, extra_args);
|
||
else
|
||
sprintf (addr_string, "*0x%x", high);
|
||
break_command_1 (addr_string, flag, from_tty);
|
||
free (addr_string);
|
||
}
|
||
else
|
||
error ("No function contains the specified address");
|
||
}
|
||
else
|
||
error ("Unable to set breakpoint at procedure exit");
|
||
}
|
||
|
||
|
||
static void
|
||
break_at_finish_command_1 (arg, flag, from_tty)
|
||
char *arg;
|
||
int flag;
|
||
int from_tty;
|
||
{
|
||
char *addr_string, *break_string, *beg_addr_string;
|
||
CORE_ADDR low, high;
|
||
struct symtabs_and_lines sals;
|
||
struct symtab_and_line sal;
|
||
struct cleanup *old_chain;
|
||
char *extra_args;
|
||
int extra_args_len = 0;
|
||
int i, if_arg = 0;
|
||
|
||
if (!arg ||
|
||
(arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
|
||
{
|
||
if (default_breakpoint_valid)
|
||
{
|
||
if (selected_frame)
|
||
{
|
||
addr_string = (char *) xmalloc (15);
|
||
sprintf (addr_string, "*0x%x", selected_frame->pc);
|
||
if (arg)
|
||
if_arg = 1;
|
||
}
|
||
else
|
||
error ("No selected frame.");
|
||
}
|
||
else
|
||
error ("No default breakpoint address now.");
|
||
}
|
||
else
|
||
{
|
||
addr_string = (char *) xmalloc (strlen (arg) + 1);
|
||
strcpy (addr_string, arg);
|
||
}
|
||
|
||
if (if_arg)
|
||
{
|
||
extra_args = arg;
|
||
extra_args_len = strlen (arg);
|
||
}
|
||
else
|
||
if (arg)
|
||
{
|
||
/* get the stuff after the function name or address */
|
||
extra_args = strchr (arg, ' ');
|
||
if (extra_args)
|
||
{
|
||
extra_args++;
|
||
extra_args_len = strlen (extra_args);
|
||
}
|
||
}
|
||
|
||
sals.sals = NULL;
|
||
sals.nelts = 0;
|
||
|
||
beg_addr_string = addr_string;
|
||
sals = decode_line_1 (&addr_string, 1, (struct symtab *)NULL, 0,
|
||
(char ***)NULL);
|
||
|
||
free (beg_addr_string);
|
||
old_chain = make_cleanup (free, sals.sals);
|
||
for (i = 0; (i < sals.nelts); i++)
|
||
{
|
||
sal = sals.sals[i];
|
||
if (find_pc_partial_function (sal.pc, (char **)NULL, &low, &high))
|
||
{
|
||
break_string = (char *) xmalloc (extra_args_len + 26);
|
||
if (extra_args_len)
|
||
sprintf (break_string, "*0x%x %s", high, extra_args);
|
||
else
|
||
sprintf (break_string, "*0x%x", high);
|
||
break_command_1 (break_string, flag, from_tty);
|
||
free(break_string);
|
||
}
|
||
else
|
||
error ("No function contains the specified address");
|
||
}
|
||
if (sals.nelts > 1)
|
||
{
|
||
printf_filtered ("Multiple breakpoints were set.\n");
|
||
printf_filtered ("Use the \"delete\" command to delete unwanted breakpoints.\n");
|
||
}
|
||
do_cleanups(old_chain);
|
||
}
|
||
|
||
|
||
/* Helper function for break_command_1 and disassemble_command. */
|
||
|
||
void
|
||
resolve_sal_pc (sal)
|
||
struct symtab_and_line *sal;
|
||
{
|
||
CORE_ADDR pc;
|
||
|
||
if (sal->pc == 0 && sal->symtab != NULL)
|
||
{
|
||
if (!find_line_pc (sal->symtab, sal->line, &pc))
|
||
error ("No line %d in file \"%s\".",
|
||
sal->line, sal->symtab->filename);
|
||
sal->pc = pc;
|
||
}
|
||
|
||
if (sal->section == 0 && sal->symtab != NULL)
|
||
{
|
||
struct blockvector *bv;
|
||
struct block *b;
|
||
struct symbol *sym;
|
||
int index;
|
||
|
||
bv = blockvector_for_pc_sect (sal->pc, 0, &index, sal->symtab);
|
||
if (bv != NULL)
|
||
{
|
||
b = BLOCKVECTOR_BLOCK (bv, index);
|
||
sym = block_function (b);
|
||
if (sym != NULL)
|
||
{
|
||
fixup_symbol_section (sym, sal->symtab->objfile);
|
||
sal->section = SYMBOL_BFD_SECTION (sym);
|
||
}
|
||
else
|
||
{
|
||
/* It really is worthwhile to have the section, so we'll just
|
||
have to look harder. This case can be executed if we have
|
||
line numbers but no functions (as can happen in assembly
|
||
source). */
|
||
|
||
struct minimal_symbol *msym;
|
||
|
||
msym = lookup_minimal_symbol_by_pc (sal->pc);
|
||
if (msym)
|
||
sal->section = SYMBOL_BFD_SECTION (msym);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
break_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
break_command_1 (arg, 0, from_tty);
|
||
}
|
||
|
||
void
|
||
break_at_finish_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
break_at_finish_command_1 (arg, 0, from_tty);
|
||
}
|
||
|
||
void
|
||
break_at_finish_at_depth_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
break_at_finish_at_depth_command_1 (arg, 0, from_tty);
|
||
}
|
||
|
||
void
|
||
tbreak_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
break_command_1 (arg, BP_TEMPFLAG, from_tty);
|
||
}
|
||
|
||
void
|
||
tbreak_at_finish_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
break_at_finish_command_1 (arg, BP_TEMPFLAG, from_tty);
|
||
}
|
||
|
||
static void
|
||
hbreak_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
break_command_1 (arg, BP_HARDWAREFLAG, from_tty);
|
||
}
|
||
|
||
static void
|
||
thbreak_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty);
|
||
}
|
||
|
||
static void
|
||
stop_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
printf_filtered ("Specify the type of breakpoint to set.\n\
|
||
Usage: stop in <function | address>\n\
|
||
stop at <line>\n");
|
||
}
|
||
|
||
static void
|
||
stopin_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
int badInput = 0;
|
||
|
||
if (arg == (char *)NULL)
|
||
badInput = 1;
|
||
else if (*arg != '*')
|
||
{
|
||
char *argptr = arg;
|
||
int hasColon = 0;
|
||
|
||
/* look for a ':'. If this is a line number specification, then say
|
||
it is bad, otherwise, it should be an address or function/method
|
||
name */
|
||
while (*argptr && !hasColon)
|
||
{
|
||
hasColon = (*argptr == ':');
|
||
argptr++;
|
||
}
|
||
|
||
if (hasColon)
|
||
badInput = (*argptr != ':'); /* Not a class::method */
|
||
else
|
||
badInput = isdigit(*arg); /* a simple line number */
|
||
}
|
||
|
||
if (badInput)
|
||
printf_filtered("Usage: stop in <function | address>\n");
|
||
else
|
||
break_command_1 (arg, 0, from_tty);
|
||
}
|
||
|
||
static void
|
||
stopat_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
int badInput = 0;
|
||
|
||
if (arg == (char *)NULL || *arg == '*') /* no line number */
|
||
badInput = 1;
|
||
else
|
||
{
|
||
char *argptr = arg;
|
||
int hasColon = 0;
|
||
|
||
/* look for a ':'. If there is a '::' then get out, otherwise
|
||
it is probably a line number. */
|
||
while (*argptr && !hasColon)
|
||
{
|
||
hasColon = (*argptr == ':');
|
||
argptr++;
|
||
}
|
||
|
||
if (hasColon)
|
||
badInput = (*argptr == ':'); /* we have class::method */
|
||
else
|
||
badInput = !isdigit(*arg); /* not a line number */
|
||
}
|
||
|
||
if (badInput)
|
||
printf_filtered("Usage: stop at <line>\n");
|
||
else
|
||
break_command_1 (arg, 0, from_tty);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
/* accessflag: 0: watch write, 1: watch read, 2: watch access(read or write) */
|
||
static void
|
||
watch_command_1 (arg, accessflag, from_tty)
|
||
char *arg;
|
||
int accessflag;
|
||
int from_tty;
|
||
{
|
||
struct breakpoint *b;
|
||
struct symtab_and_line sal;
|
||
struct expression *exp;
|
||
struct block *exp_valid_block;
|
||
struct value *val, *mark;
|
||
struct frame_info *frame;
|
||
struct frame_info *prev_frame = NULL;
|
||
char *exp_start = NULL;
|
||
char *exp_end = NULL;
|
||
char *tok, *end_tok;
|
||
int toklen;
|
||
char *cond_start = NULL;
|
||
char *cond_end = NULL;
|
||
struct expression *cond = NULL;
|
||
int i, other_type_used, target_resources_ok = 0;
|
||
enum bptype bp_type;
|
||
int mem_cnt = 0;
|
||
|
||
INIT_SAL (&sal); /* initialize to zeroes */
|
||
|
||
/* Parse arguments. */
|
||
innermost_block = NULL;
|
||
exp_start = arg;
|
||
exp = parse_exp_1 (&arg, 0, 0);
|
||
exp_end = arg;
|
||
exp_valid_block = innermost_block;
|
||
mark = value_mark ();
|
||
val = evaluate_expression (exp);
|
||
release_value (val);
|
||
if (VALUE_LAZY (val))
|
||
value_fetch_lazy (val);
|
||
|
||
tok = arg;
|
||
while (*tok == ' ' || *tok == '\t')
|
||
tok++;
|
||
end_tok = tok;
|
||
|
||
while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
|
||
end_tok++;
|
||
|
||
toklen = end_tok - tok;
|
||
if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
|
||
{
|
||
tok = cond_start = end_tok + 1;
|
||
cond = parse_exp_1 (&tok, 0, 0);
|
||
cond_end = tok;
|
||
}
|
||
if (*tok)
|
||
error("Junk at end of command.");
|
||
|
||
if (accessflag == 1) bp_type = bp_read_watchpoint;
|
||
else if (accessflag == 2) bp_type = bp_access_watchpoint;
|
||
else bp_type = bp_hardware_watchpoint;
|
||
|
||
mem_cnt = can_use_hardware_watchpoint (val);
|
||
if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint)
|
||
error ("Expression cannot be implemented with read/access watchpoint.");
|
||
if (mem_cnt != 0) {
|
||
i = hw_watchpoint_used_count (bp_type, &other_type_used);
|
||
target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT(
|
||
bp_type, i + mem_cnt, other_type_used);
|
||
if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint)
|
||
error ("Target does not have this type of hardware watchpoint support.");
|
||
if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint)
|
||
error ("Target resources have been allocated for other types of watchpoints.");
|
||
}
|
||
|
||
#if defined(HPUXHPPA)
|
||
/* ??rehrauer: DTS #CHFts23014 notes that on HP-UX if you set a h/w
|
||
watchpoint before the "run" command, the inferior dies with a e.g.,
|
||
SIGILL once you start it. I initially believed this was due to a
|
||
bad interaction between page protection traps and the initial
|
||
startup sequence by the dynamic linker.
|
||
|
||
However, I tried avoiding that by having HP-UX's implementation of
|
||
TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_pid
|
||
yet, which forced slow watches before a "run" or "attach", and it
|
||
still fails somewhere in the startup code.
|
||
|
||
Until I figure out what's happening, I'm disallowing watches altogether
|
||
before the "run" or "attach" command. We'll tell the user they must
|
||
set watches after getting the program started. */
|
||
if (! target_has_execution)
|
||
{
|
||
warning ("can't do that without a running program; try \"break main\", \"run\" first");
|
||
return;
|
||
}
|
||
#endif /* HPUXHPPA */
|
||
|
||
/* Now set up the breakpoint. */
|
||
b = set_raw_breakpoint (sal);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->disposition = donttouch;
|
||
b->exp = exp;
|
||
b->exp_valid_block = exp_valid_block;
|
||
b->exp_string = savestring (exp_start, exp_end - exp_start);
|
||
b->val = val;
|
||
b->cond = cond;
|
||
if (cond_start)
|
||
b->cond_string = savestring (cond_start, cond_end - cond_start);
|
||
else
|
||
b->cond_string = 0;
|
||
|
||
frame = block_innermost_frame (exp_valid_block);
|
||
if (frame)
|
||
{
|
||
prev_frame = get_prev_frame (frame);
|
||
b->watchpoint_frame = frame->frame;
|
||
}
|
||
else
|
||
b->watchpoint_frame = (CORE_ADDR)0;
|
||
|
||
if (mem_cnt && target_resources_ok > 0)
|
||
b->type = bp_type;
|
||
else
|
||
b->type = bp_watchpoint;
|
||
|
||
/* If the expression is "local", then set up a "watchpoint scope"
|
||
breakpoint at the point where we've left the scope of the watchpoint
|
||
expression. */
|
||
if (innermost_block)
|
||
{
|
||
if (prev_frame)
|
||
{
|
||
struct breakpoint *scope_breakpoint;
|
||
struct symtab_and_line scope_sal;
|
||
|
||
INIT_SAL (&scope_sal); /* initialize to zeroes */
|
||
scope_sal.pc = get_frame_pc (prev_frame);
|
||
scope_sal.section = find_pc_overlay (scope_sal.pc);
|
||
|
||
scope_breakpoint = set_raw_breakpoint (scope_sal);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
scope_breakpoint->number = breakpoint_count;
|
||
|
||
scope_breakpoint->type = bp_watchpoint_scope;
|
||
scope_breakpoint->enable = enabled;
|
||
|
||
/* Automatically delete the breakpoint when it hits. */
|
||
scope_breakpoint->disposition = del;
|
||
|
||
/* Only break in the proper frame (help with recursion). */
|
||
scope_breakpoint->frame = prev_frame->frame;
|
||
|
||
/* Set the address at which we will stop. */
|
||
scope_breakpoint->address = get_frame_pc (prev_frame);
|
||
|
||
/* The scope breakpoint is related to the watchpoint. We
|
||
will need to act on them together. */
|
||
b->related_breakpoint = scope_breakpoint;
|
||
}
|
||
}
|
||
value_free_to_mark (mark);
|
||
mention (b);
|
||
}
|
||
|
||
/* Return count of locations need to be watched and can be handled
|
||
in hardware. If the watchpoint can not be handled
|
||
in hardware return zero. */
|
||
|
||
#if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
|
||
#define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(byte_size) \
|
||
((byte_size) <= (REGISTER_SIZE))
|
||
#endif
|
||
|
||
static int
|
||
can_use_hardware_watchpoint (v)
|
||
struct value *v;
|
||
{
|
||
int found_memory_cnt = 0;
|
||
|
||
/* Did the user specifically forbid us to use hardware watchpoints? */
|
||
if (! can_use_hw_watchpoints)
|
||
return 0;
|
||
|
||
/* Make sure all the intermediate values are in memory. Also make sure
|
||
we found at least one memory expression. Guards against watch 0x12345,
|
||
which is meaningless, but could cause errors if one tries to insert a
|
||
hardware watchpoint for the constant expression. */
|
||
for ( ; v; v = v->next)
|
||
{
|
||
if (v->lval == lval_memory)
|
||
{
|
||
if (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT (TYPE_LENGTH (VALUE_TYPE (v))))
|
||
found_memory_cnt++;
|
||
}
|
||
else if (v->lval != not_lval && v->modifiable == 0)
|
||
return 0;
|
||
}
|
||
|
||
/* The expression itself looks suitable for using a hardware
|
||
watchpoint, but give the target machine a chance to reject it. */
|
||
return found_memory_cnt;
|
||
}
|
||
|
||
static void watch_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
watch_command_1 (arg, 0, from_tty);
|
||
}
|
||
|
||
static void rwatch_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
watch_command_1 (arg, 1, from_tty);
|
||
}
|
||
|
||
static void awatch_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
watch_command_1 (arg, 2, from_tty);
|
||
}
|
||
|
||
|
||
/* Helper routine for the until_command routine in infcmd.c. Here
|
||
because it uses the mechanisms of breakpoints. */
|
||
|
||
/* ARGSUSED */
|
||
void
|
||
until_break_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
struct symtabs_and_lines sals;
|
||
struct symtab_and_line sal;
|
||
struct frame_info *prev_frame = get_prev_frame (selected_frame);
|
||
struct breakpoint *breakpoint;
|
||
struct cleanup *old_chain;
|
||
|
||
clear_proceed_status ();
|
||
|
||
/* Set a breakpoint where the user wants it and at return from
|
||
this function */
|
||
|
||
if (default_breakpoint_valid)
|
||
sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
|
||
default_breakpoint_line, (char ***)NULL);
|
||
else
|
||
sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, (char ***)NULL);
|
||
|
||
if (sals.nelts != 1)
|
||
error ("Couldn't get information on specified line.");
|
||
|
||
sal = sals.sals[0];
|
||
free ((PTR)sals.sals); /* malloc'd, so freed */
|
||
|
||
if (*arg)
|
||
error ("Junk at end of arguments.");
|
||
|
||
resolve_sal_pc (&sal);
|
||
|
||
breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until);
|
||
|
||
old_chain = make_cleanup ((make_cleanup_func) delete_breakpoint, breakpoint);
|
||
|
||
/* Keep within the current frame */
|
||
|
||
if (prev_frame)
|
||
{
|
||
sal = find_pc_line (prev_frame->pc, 0);
|
||
sal.pc = prev_frame->pc;
|
||
breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until);
|
||
make_cleanup ((make_cleanup_func) delete_breakpoint, breakpoint);
|
||
}
|
||
|
||
proceed (-1, TARGET_SIGNAL_DEFAULT, 0);
|
||
do_cleanups(old_chain);
|
||
}
|
||
|
||
#if 0
|
||
/* These aren't used; I don't konw what they were for. */
|
||
/* Set a breakpoint at the catch clause for NAME. */
|
||
static int
|
||
catch_breakpoint (name)
|
||
char *name;
|
||
{
|
||
}
|
||
|
||
static int
|
||
disable_catch_breakpoint ()
|
||
{
|
||
}
|
||
|
||
static int
|
||
delete_catch_breakpoint ()
|
||
{
|
||
}
|
||
|
||
static int
|
||
enable_catch_breakpoint ()
|
||
{
|
||
}
|
||
#endif /* 0 */
|
||
|
||
struct sal_chain
|
||
{
|
||
struct sal_chain *next;
|
||
struct symtab_and_line sal;
|
||
};
|
||
|
||
/* Not really used -- invocation in handle_gnu_4_16_catch_command
|
||
had been commented out in the v.4.16 sources, and stays
|
||
disabled there now because "catch NAME" syntax isn't allowed.
|
||
pai/1997-07-11 */
|
||
/* This isn't used; I don't know what it was for. */
|
||
/* For each catch clause identified in ARGS, run FUNCTION
|
||
with that clause as an argument. */
|
||
static struct symtabs_and_lines
|
||
map_catch_names (args, function)
|
||
char *args;
|
||
int (*function)();
|
||
{
|
||
register char *p = args;
|
||
register char *p1;
|
||
struct symtabs_and_lines sals;
|
||
#if 0
|
||
struct sal_chain *sal_chain = 0;
|
||
#endif
|
||
|
||
if (p == 0)
|
||
error_no_arg ("one or more catch names");
|
||
|
||
sals.nelts = 0;
|
||
sals.sals = NULL;
|
||
|
||
while (*p)
|
||
{
|
||
p1 = p;
|
||
/* Don't swallow conditional part. */
|
||
if (p1[0] == 'i' && p1[1] == 'f'
|
||
&& (p1[2] == ' ' || p1[2] == '\t'))
|
||
break;
|
||
|
||
if (isalpha (*p1))
|
||
{
|
||
p1++;
|
||
while (isalnum (*p1) || *p1 == '_' || *p1 == '$')
|
||
p1++;
|
||
}
|
||
|
||
if (*p1 && *p1 != ' ' && *p1 != '\t')
|
||
error ("Arguments must be catch names.");
|
||
|
||
*p1 = 0;
|
||
#if 0
|
||
if (function (p))
|
||
{
|
||
struct sal_chain *next = (struct sal_chain *)
|
||
alloca (sizeof (struct sal_chain));
|
||
next->next = sal_chain;
|
||
next->sal = get_catch_sal (p);
|
||
sal_chain = next;
|
||
goto win;
|
||
}
|
||
#endif
|
||
printf_unfiltered ("No catch clause for exception %s.\n", p);
|
||
#if 0
|
||
win:
|
||
#endif
|
||
p = p1;
|
||
while (*p == ' ' || *p == '\t') p++;
|
||
}
|
||
}
|
||
|
||
/* This shares a lot of code with `print_frame_label_vars' from stack.c. */
|
||
|
||
static struct symtabs_and_lines
|
||
get_catch_sals (this_level_only)
|
||
int this_level_only;
|
||
{
|
||
register struct blockvector *bl;
|
||
register struct block *block;
|
||
int index, have_default = 0;
|
||
CORE_ADDR pc;
|
||
struct symtabs_and_lines sals;
|
||
struct sal_chain *sal_chain = 0;
|
||
char *blocks_searched;
|
||
|
||
/* Not sure whether an error message is always the correct response,
|
||
but it's better than a core dump. */
|
||
if (selected_frame == NULL)
|
||
error ("No selected frame.");
|
||
block = get_frame_block (selected_frame);
|
||
pc = selected_frame->pc;
|
||
|
||
sals.nelts = 0;
|
||
sals.sals = NULL;
|
||
|
||
if (block == 0)
|
||
error ("No symbol table info available.\n");
|
||
|
||
bl = blockvector_for_pc (BLOCK_END (block) - 4, &index);
|
||
blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
|
||
memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
|
||
|
||
while (block != 0)
|
||
{
|
||
CORE_ADDR end = BLOCK_END (block) - 4;
|
||
int last_index;
|
||
|
||
if (bl != blockvector_for_pc (end, &index))
|
||
error ("blockvector blotch");
|
||
if (BLOCKVECTOR_BLOCK (bl, index) != block)
|
||
error ("blockvector botch");
|
||
last_index = BLOCKVECTOR_NBLOCKS (bl);
|
||
index += 1;
|
||
|
||
/* Don't print out blocks that have gone by. */
|
||
while (index < last_index
|
||
&& BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc)
|
||
index++;
|
||
|
||
while (index < last_index
|
||
&& BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end)
|
||
{
|
||
if (blocks_searched[index] == 0)
|
||
{
|
||
struct block *b = BLOCKVECTOR_BLOCK (bl, index);
|
||
int nsyms;
|
||
register int i;
|
||
register struct symbol *sym;
|
||
|
||
nsyms = BLOCK_NSYMS (b);
|
||
|
||
for (i = 0; i < nsyms; i++)
|
||
{
|
||
sym = BLOCK_SYM (b, i);
|
||
if (STREQ (SYMBOL_NAME (sym), "default"))
|
||
{
|
||
if (have_default)
|
||
continue;
|
||
have_default = 1;
|
||
}
|
||
if (SYMBOL_CLASS (sym) == LOC_LABEL)
|
||
{
|
||
struct sal_chain *next = (struct sal_chain *)
|
||
alloca (sizeof (struct sal_chain));
|
||
next->next = sal_chain;
|
||
next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0);
|
||
sal_chain = next;
|
||
}
|
||
}
|
||
blocks_searched[index] = 1;
|
||
}
|
||
index++;
|
||
}
|
||
if (have_default)
|
||
break;
|
||
if (sal_chain && this_level_only)
|
||
break;
|
||
|
||
/* After handling the function's top-level block, stop.
|
||
Don't continue to its superblock, the block of
|
||
per-file symbols. */
|
||
if (BLOCK_FUNCTION (block))
|
||
break;
|
||
block = BLOCK_SUPERBLOCK (block);
|
||
}
|
||
|
||
if (sal_chain)
|
||
{
|
||
struct sal_chain *tmp_chain;
|
||
|
||
/* Count the number of entries. */
|
||
for (index = 0, tmp_chain = sal_chain; tmp_chain;
|
||
tmp_chain = tmp_chain->next)
|
||
index++;
|
||
|
||
sals.nelts = index;
|
||
sals.sals = (struct symtab_and_line *)
|
||
xmalloc (index * sizeof (struct symtab_and_line));
|
||
for (index = 0; sal_chain; sal_chain = sal_chain->next, index++)
|
||
sals.sals[index] = sal_chain->sal;
|
||
}
|
||
|
||
return sals;
|
||
}
|
||
|
||
static void
|
||
ep_skip_leading_whitespace (s)
|
||
char ** s;
|
||
{
|
||
if ((s == NULL) || (*s == NULL))
|
||
return;
|
||
while (isspace(**s))
|
||
*s += 1;
|
||
}
|
||
|
||
/* This function examines a string, and attempts to find a token
|
||
that might be an event name in the leading characters. If a
|
||
possible match is found, a pointer to the last character of
|
||
the token is returned. Else, NULL is returned. */
|
||
static char *
|
||
ep_find_event_name_end (arg)
|
||
char * arg;
|
||
{
|
||
char * s = arg;
|
||
char * event_name_end = NULL;
|
||
|
||
/* If we could depend upon the presense of strrpbrk, we'd use that... */
|
||
if (arg == NULL)
|
||
return NULL;
|
||
|
||
/* We break out of the loop when we find a token delimiter.
|
||
Basically, we're looking for alphanumerics and underscores;
|
||
anything else delimites the token. */
|
||
while (*s != '\0')
|
||
{
|
||
if (! isalnum(*s) && (*s != '_'))
|
||
break;
|
||
event_name_end = s;
|
||
s++;
|
||
}
|
||
|
||
return event_name_end;
|
||
}
|
||
|
||
|
||
/* This function attempts to parse an optional "if <cond>" clause
|
||
from the arg string. If one is not found, it returns NULL.
|
||
|
||
Else, it returns a pointer to the condition string. (It does not
|
||
attempt to evaluate the string against a particular block.) And,
|
||
it updates arg to point to the first character following the parsed
|
||
if clause in the arg string. */
|
||
static char *
|
||
ep_parse_optional_if_clause (arg)
|
||
char ** arg;
|
||
{
|
||
char * cond_string;
|
||
|
||
if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace((*arg)[2]))
|
||
return NULL;
|
||
|
||
/* Skip the "if" keyword. */
|
||
(*arg) += 2;
|
||
|
||
/* Skip any extra leading whitespace, and record the start of the
|
||
condition string. */
|
||
ep_skip_leading_whitespace (arg);
|
||
cond_string = *arg;
|
||
|
||
/* Assume that the condition occupies the remainder of the arg string. */
|
||
(*arg) += strlen (cond_string);
|
||
|
||
return cond_string;
|
||
}
|
||
|
||
/* This function attempts to parse an optional filename from the arg
|
||
string. If one is not found, it returns NULL.
|
||
|
||
Else, it returns a pointer to the parsed filename. (This function
|
||
makes no attempt to verify that a file of that name exists, or is
|
||
accessible.) And, it updates arg to point to the first character
|
||
following the parsed filename in the arg string.
|
||
|
||
Note that clients needing to preserve the returned filename for
|
||
future access should copy it to their own buffers. */
|
||
static char *
|
||
ep_parse_optional_filename (arg)
|
||
char ** arg;
|
||
{
|
||
static char filename [1024];
|
||
char * arg_p = *arg;
|
||
int i;
|
||
char c;
|
||
|
||
if ((*arg_p == '\0') || isspace (*arg_p))
|
||
return NULL;
|
||
|
||
for (i=0; ; i++)
|
||
{
|
||
c = *arg_p;
|
||
if (isspace (c))
|
||
c = '\0';
|
||
filename[i] = c;
|
||
if (c == '\0')
|
||
break;
|
||
arg_p++;
|
||
}
|
||
*arg = arg_p;
|
||
|
||
return filename;
|
||
}
|
||
|
||
/* Commands to deal with catching events, such as signals, exceptions,
|
||
process start/exit, etc. */
|
||
|
||
typedef enum {catch_fork, catch_vfork} catch_fork_kind;
|
||
|
||
static void
|
||
catch_fork_command_1 (fork_kind, arg, tempflag, from_tty)
|
||
catch_fork_kind fork_kind;
|
||
char * arg;
|
||
int tempflag;
|
||
int from_tty;
|
||
{
|
||
char * cond_string = NULL;
|
||
|
||
ep_skip_leading_whitespace (&arg);
|
||
|
||
/* The allowed syntax is:
|
||
catch [v]fork
|
||
catch [v]fork if <cond>
|
||
|
||
First, check if there's an if clause. */
|
||
cond_string = ep_parse_optional_if_clause (&arg);
|
||
|
||
if ((*arg != '\0') && !isspace (*arg))
|
||
error ("Junk at end of arguments.");
|
||
|
||
/* If this target supports it, create a fork or vfork catchpoint
|
||
and enable reporting of such events. */
|
||
switch (fork_kind) {
|
||
case catch_fork :
|
||
create_fork_event_catchpoint (tempflag, cond_string);
|
||
break;
|
||
case catch_vfork :
|
||
create_vfork_event_catchpoint (tempflag, cond_string);
|
||
break;
|
||
default :
|
||
error ("unsupported or unknown fork kind; cannot catch it");
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
catch_exec_command_1 (arg, tempflag, from_tty)
|
||
char * arg;
|
||
int tempflag;
|
||
int from_tty;
|
||
{
|
||
char * cond_string = NULL;
|
||
|
||
ep_skip_leading_whitespace (&arg);
|
||
|
||
/* The allowed syntax is:
|
||
catch exec
|
||
catch exec if <cond>
|
||
|
||
First, check if there's an if clause. */
|
||
cond_string = ep_parse_optional_if_clause (&arg);
|
||
|
||
if ((*arg != '\0') && !isspace (*arg))
|
||
error ("Junk at end of arguments.");
|
||
|
||
/* If this target supports it, create an exec catchpoint
|
||
and enable reporting of such events. */
|
||
create_exec_event_catchpoint (tempflag, cond_string);
|
||
}
|
||
|
||
#if defined(SOLIB_ADD)
|
||
static void
|
||
catch_load_command_1 (arg, tempflag, from_tty)
|
||
char * arg;
|
||
int tempflag;
|
||
int from_tty;
|
||
{
|
||
char * dll_pathname = NULL;
|
||
char * cond_string = NULL;
|
||
|
||
ep_skip_leading_whitespace (&arg);
|
||
|
||
/* The allowed syntax is:
|
||
catch load
|
||
catch load if <cond>
|
||
catch load <filename>
|
||
catch load <filename> if <cond>
|
||
|
||
The user is not allowed to specify the <filename> after an
|
||
if clause.
|
||
|
||
We'll ignore the pathological case of a file named "if".
|
||
|
||
First, check if there's an if clause. If so, then there
|
||
cannot be a filename. */
|
||
cond_string = ep_parse_optional_if_clause (&arg);
|
||
|
||
/* If there was an if clause, then there cannot be a filename.
|
||
Else, there might be a filename and an if clause. */
|
||
if (cond_string == NULL)
|
||
{
|
||
dll_pathname = ep_parse_optional_filename (&arg);
|
||
ep_skip_leading_whitespace (&arg);
|
||
cond_string = ep_parse_optional_if_clause (&arg);
|
||
}
|
||
|
||
if ((*arg != '\0') && !isspace (*arg))
|
||
error ("Junk at end of arguments.");
|
||
|
||
/* Create a load breakpoint that only triggers when a load of
|
||
the specified dll (or any dll, if no pathname was specified)
|
||
occurs. */
|
||
SOLIB_CREATE_CATCH_LOAD_HOOK (inferior_pid, tempflag, dll_pathname, cond_string);
|
||
}
|
||
|
||
static void
|
||
catch_unload_command_1 (arg, tempflag, from_tty)
|
||
char * arg;
|
||
int tempflag;
|
||
int from_tty;
|
||
{
|
||
char * dll_pathname = NULL;
|
||
char * cond_string = NULL;
|
||
|
||
ep_skip_leading_whitespace (&arg);
|
||
|
||
/* The allowed syntax is:
|
||
catch unload
|
||
catch unload if <cond>
|
||
catch unload <filename>
|
||
catch unload <filename> if <cond>
|
||
|
||
The user is not allowed to specify the <filename> after an
|
||
if clause.
|
||
|
||
We'll ignore the pathological case of a file named "if".
|
||
|
||
First, check if there's an if clause. If so, then there
|
||
cannot be a filename. */
|
||
cond_string = ep_parse_optional_if_clause (&arg);
|
||
|
||
/* If there was an if clause, then there cannot be a filename.
|
||
Else, there might be a filename and an if clause. */
|
||
if (cond_string == NULL)
|
||
{
|
||
dll_pathname = ep_parse_optional_filename (&arg);
|
||
ep_skip_leading_whitespace (&arg);
|
||
cond_string = ep_parse_optional_if_clause (&arg);
|
||
}
|
||
|
||
if ((*arg != '\0') && !isspace (*arg))
|
||
error ("Junk at end of arguments.");
|
||
|
||
/* Create an unload breakpoint that only triggers when an unload of
|
||
the specified dll (or any dll, if no pathname was specified)
|
||
occurs. */
|
||
SOLIB_CREATE_CATCH_UNLOAD_HOOK (inferior_pid, tempflag, dll_pathname, cond_string);
|
||
}
|
||
#endif /* SOLIB_ADD */
|
||
|
||
/* Commands to deal with catching exceptions. */
|
||
|
||
/* Set a breakpoint at the specified callback routine for an
|
||
exception event callback */
|
||
|
||
static void
|
||
create_exception_catchpoint (tempflag, cond_string, ex_event, sal)
|
||
int tempflag;
|
||
char * cond_string;
|
||
enum exception_event_kind ex_event;
|
||
struct symtab_and_line * sal;
|
||
{
|
||
struct breakpoint * b;
|
||
int i;
|
||
int thread = -1; /* All threads. */
|
||
|
||
if (!sal) /* no exception support? */
|
||
return;
|
||
|
||
b = set_raw_breakpoint (*sal);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->cond = NULL;
|
||
b->cond_string = (cond_string == NULL) ? NULL : savestring (cond_string, strlen (cond_string));
|
||
b->thread = thread;
|
||
b->addr_string = NULL;
|
||
b->enable = enabled;
|
||
b->disposition = tempflag ? del : donttouch;
|
||
switch (ex_event)
|
||
{
|
||
case EX_EVENT_THROW:
|
||
b->type = bp_catch_throw;
|
||
break;
|
||
case EX_EVENT_CATCH:
|
||
b->type = bp_catch_catch;
|
||
break;
|
||
default: /* error condition */
|
||
b->type = bp_none;
|
||
b->enable = disabled;
|
||
error ("Internal error -- invalid catchpoint kind");
|
||
}
|
||
mention (b);
|
||
}
|
||
|
||
/* Deal with "catch catch" and "catch throw" commands */
|
||
|
||
static void
|
||
catch_exception_command_1 (ex_event, arg, tempflag, from_tty)
|
||
enum exception_event_kind ex_event;
|
||
char * arg;
|
||
int tempflag;
|
||
int from_tty;
|
||
{
|
||
char * cond_string = NULL;
|
||
struct symtab_and_line * sal = NULL;
|
||
|
||
ep_skip_leading_whitespace (&arg);
|
||
|
||
cond_string = ep_parse_optional_if_clause (&arg);
|
||
|
||
if ((*arg != '\0') && !isspace (*arg))
|
||
error ("Junk at end of arguments.");
|
||
|
||
if ((ex_event != EX_EVENT_THROW) &&
|
||
(ex_event != EX_EVENT_CATCH))
|
||
error ("Unsupported or unknown exception event; cannot catch it");
|
||
|
||
/* See if we can find a callback routine */
|
||
sal = target_enable_exception_callback (ex_event, 1);
|
||
|
||
if (sal)
|
||
{
|
||
/* We have callbacks from the runtime system for exceptions.
|
||
Set a breakpoint on the sal found, if no errors */
|
||
if (sal != (struct symtab_and_line *) -1)
|
||
create_exception_catchpoint (tempflag, cond_string, ex_event, sal);
|
||
else
|
||
return; /* something went wrong with setting up callbacks */
|
||
}
|
||
else
|
||
{
|
||
/* No callbacks from runtime system for exceptions.
|
||
Try GNU C++ exception breakpoints using labels in debug info. */
|
||
if (ex_event == EX_EVENT_CATCH)
|
||
{
|
||
handle_gnu_4_16_catch_command (arg, tempflag, from_tty);
|
||
}
|
||
else if (ex_event == EX_EVENT_THROW)
|
||
{
|
||
/* Set a breakpoint on __raise_exception () */
|
||
|
||
fprintf_filtered (gdb_stderr, "Unsupported with this platform/compiler combination.\n");
|
||
fprintf_filtered (gdb_stderr, "Perhaps you can achieve the effect you want by setting\n");
|
||
fprintf_filtered (gdb_stderr, "a breakpoint on __raise_exception().\n");
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Cover routine to allow wrapping target_enable_exception_catchpoints
|
||
inside a catch_errors */
|
||
|
||
static struct symtab_and_line *
|
||
cover_target_enable_exception_callback (args)
|
||
args_for_catchpoint_enable * args;
|
||
{
|
||
target_enable_exception_callback (args->kind, args->enable);
|
||
}
|
||
|
||
|
||
|
||
/* This is the original v.4.16 and earlier version of the
|
||
catch_command_1() function. Now that other flavours of "catch"
|
||
have been introduced, and since exception handling can be handled
|
||
in other ways (through target ops) also, this is used only for the
|
||
GNU C++ exception handling system.
|
||
Note: Only the "catch" flavour of GDB 4.16 is handled here. The
|
||
"catch NAME" is now no longer allowed in catch_command_1(). Also,
|
||
there was no code in GDB 4.16 for "catch throw".
|
||
|
||
Called from catch_exception_command_1 () */
|
||
|
||
|
||
static void
|
||
handle_gnu_4_16_catch_command (arg, tempflag, from_tty)
|
||
char *arg;
|
||
int tempflag;
|
||
int from_tty;
|
||
{
|
||
/* First, translate ARG into something we can deal with in terms
|
||
of breakpoints. */
|
||
|
||
struct symtabs_and_lines sals;
|
||
struct symtab_and_line sal;
|
||
register struct expression *cond = 0;
|
||
register struct breakpoint *b;
|
||
char *save_arg;
|
||
int i;
|
||
|
||
INIT_SAL (&sal); /* initialize to zeroes */
|
||
|
||
/* If no arg given, or if first arg is 'if ', all active catch clauses
|
||
are breakpointed. */
|
||
|
||
if (!arg || (arg[0] == 'i' && arg[1] == 'f'
|
||
&& (arg[2] == ' ' || arg[2] == '\t')))
|
||
{
|
||
/* Grab all active catch clauses. */
|
||
sals = get_catch_sals (0);
|
||
}
|
||
else
|
||
{
|
||
/* Grab selected catch clauses. */
|
||
error ("catch NAME not implemented");
|
||
|
||
#if 0
|
||
/* Not sure why this code has been disabled. I'm leaving
|
||
it disabled. We can never come here now anyway
|
||
since we don't allow the "catch NAME" syntax.
|
||
pai/1997-07-11 */
|
||
|
||
/* This isn't used; I don't know what it was for. */
|
||
sals = map_catch_names (arg, catch_breakpoint);
|
||
#endif
|
||
}
|
||
|
||
if (! sals.nelts)
|
||
return;
|
||
|
||
save_arg = arg;
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
resolve_sal_pc (&sals.sals[i]);
|
||
|
||
while (arg && *arg)
|
||
{
|
||
if (arg[0] == 'i' && arg[1] == 'f'
|
||
&& (arg[2] == ' ' || arg[2] == '\t'))
|
||
cond = parse_exp_1 ((arg += 2, &arg),
|
||
block_for_pc (sals.sals[i].pc), 0);
|
||
else
|
||
error ("Junk at end of arguments.");
|
||
}
|
||
arg = save_arg;
|
||
}
|
||
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
sal = sals.sals[i];
|
||
|
||
if (from_tty)
|
||
describe_other_breakpoints (sal.pc, sal.section);
|
||
|
||
b = set_raw_breakpoint (sal);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->type = bp_breakpoint; /* Important -- this is an ordinary breakpoint.
|
||
For platforms with callback support for exceptions,
|
||
create_exception_catchpoint() will create special
|
||
bp types (bp_catch_catch and bp_catch_throw), and
|
||
there is code in insert_breakpoints() and elsewhere
|
||
that depends on that. */
|
||
|
||
b->cond = cond;
|
||
b->enable = enabled;
|
||
b->disposition = tempflag ? del : donttouch;
|
||
|
||
mention (b);
|
||
}
|
||
|
||
if (sals.nelts > 1)
|
||
{
|
||
printf_unfiltered ("Multiple breakpoints were set.\n");
|
||
printf_unfiltered ("Use the \"delete\" command to delete unwanted breakpoints.\n");
|
||
}
|
||
free ((PTR)sals.sals);
|
||
}
|
||
|
||
#if 0
|
||
/* This creates a temporary internal breakpoint
|
||
just to placate infrun */
|
||
static struct breakpoint *
|
||
create_temp_exception_breakpoint (pc)
|
||
CORE_ADDR pc;
|
||
{
|
||
struct symtab_and_line sal;
|
||
struct breakpoint *b;
|
||
|
||
INIT_SAL(&sal);
|
||
sal.pc = pc;
|
||
sal.symtab = NULL;
|
||
sal.line = 0;
|
||
|
||
b = set_raw_breakpoint (sal);
|
||
if (!b)
|
||
error ("Internal error -- couldn't set temp exception breakpoint");
|
||
|
||
b->type = bp_breakpoint;
|
||
b->disposition = del;
|
||
b->enable = enabled;
|
||
b->silent = 1;
|
||
b->number = internal_breakpoint_number--;
|
||
return b;
|
||
}
|
||
#endif
|
||
|
||
static void
|
||
catch_command_1 (arg, tempflag, from_tty)
|
||
char *arg;
|
||
int tempflag;
|
||
int from_tty;
|
||
{
|
||
|
||
/* The first argument may be an event name, such as "start" or "load".
|
||
If so, then handle it as such. If it doesn't match an event name,
|
||
then attempt to interpret it as an exception name. (This latter is
|
||
the v4.16-and-earlier GDB meaning of the "catch" command.)
|
||
|
||
First, try to find the bounds of what might be an event name. */
|
||
char * arg1_start = arg;
|
||
char * arg1_end;
|
||
int arg1_length;
|
||
|
||
if (arg1_start == NULL)
|
||
{
|
||
/* Old behaviour was to use pre-v-4.16 syntax */
|
||
/* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
|
||
/* return; */
|
||
/* Now, this is not allowed */
|
||
error ("Catch requires an event name.");
|
||
|
||
}
|
||
arg1_end = ep_find_event_name_end (arg1_start);
|
||
if (arg1_end == NULL)
|
||
error ("catch requires an event");
|
||
arg1_length = arg1_end + 1 - arg1_start;
|
||
|
||
/* Try to match what we found against known event names. */
|
||
if (strncmp (arg1_start, "signal", arg1_length) == 0)
|
||
{
|
||
error ("Catch of signal not yet implemented");
|
||
}
|
||
else if (strncmp (arg1_start, "catch", arg1_length) == 0)
|
||
{
|
||
catch_exception_command_1 (EX_EVENT_CATCH, arg1_end+1, tempflag, from_tty);
|
||
}
|
||
else if (strncmp (arg1_start, "throw", arg1_length) == 0)
|
||
{
|
||
catch_exception_command_1 (EX_EVENT_THROW, arg1_end+1, tempflag, from_tty);
|
||
}
|
||
else if (strncmp (arg1_start, "thread_start", arg1_length) == 0)
|
||
{
|
||
error ("Catch of thread_start not yet implemented");
|
||
}
|
||
else if (strncmp (arg1_start, "thread_exit", arg1_length) == 0)
|
||
{
|
||
error ("Catch of thread_exit not yet implemented");
|
||
}
|
||
else if (strncmp (arg1_start, "thread_join", arg1_length) == 0)
|
||
{
|
||
error ("Catch of thread_join not yet implemented");
|
||
}
|
||
else if (strncmp (arg1_start, "start", arg1_length) == 0)
|
||
{
|
||
error ("Catch of start not yet implemented");
|
||
}
|
||
else if (strncmp (arg1_start, "exit", arg1_length) == 0)
|
||
{
|
||
error ("Catch of exit not yet implemented");
|
||
}
|
||
else if (strncmp (arg1_start, "fork", arg1_length) == 0)
|
||
{
|
||
#if defined(CHILD_INSERT_FORK_CATCHPOINT)
|
||
catch_fork_command_1 (catch_fork, arg1_end+1, tempflag, from_tty);
|
||
#else
|
||
error ("Catch of fork not yet implemented");
|
||
#endif
|
||
}
|
||
else if (strncmp (arg1_start, "vfork", arg1_length) == 0)
|
||
{
|
||
#if defined(CHILD_INSERT_VFORK_CATCHPOINT)
|
||
catch_fork_command_1 (catch_vfork, arg1_end+1, tempflag, from_tty);
|
||
#else
|
||
error ("Catch of vfork not yet implemented");
|
||
#endif
|
||
}
|
||
else if (strncmp (arg1_start, "exec", arg1_length) == 0)
|
||
{
|
||
#if defined(CHILD_INSERT_EXEC_CATCHPOINT)
|
||
catch_exec_command_1 (arg1_end+1, tempflag, from_tty);
|
||
#else
|
||
error ("Catch of exec not yet implemented");
|
||
#endif
|
||
}
|
||
else if (strncmp (arg1_start, "load", arg1_length) == 0)
|
||
{
|
||
#if defined(SOLIB_ADD)
|
||
catch_load_command_1 (arg1_end+1, tempflag, from_tty);
|
||
#else
|
||
error ("Catch of load not implemented");
|
||
#endif
|
||
}
|
||
else if (strncmp (arg1_start, "unload", arg1_length) == 0)
|
||
{
|
||
#if defined(SOLIB_ADD)
|
||
catch_unload_command_1 (arg1_end+1, tempflag, from_tty);
|
||
#else
|
||
error ("Catch of load not implemented");
|
||
#endif
|
||
}
|
||
else if (strncmp (arg1_start, "stop", arg1_length) == 0)
|
||
{
|
||
error ("Catch of stop not yet implemented");
|
||
}
|
||
|
||
/* This doesn't appear to be an event name */
|
||
|
||
else
|
||
{
|
||
/* Pre-v.4.16 behaviour was to treat the argument
|
||
as the name of an exception */
|
||
/* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
|
||
/* Now this is not allowed */
|
||
error ("Unknown event kind specified for catch");
|
||
|
||
}
|
||
}
|
||
|
||
/* Used by the gui, could be made a worker for other things. */
|
||
|
||
struct breakpoint *
|
||
set_breakpoint_sal (sal)
|
||
struct symtab_and_line sal;
|
||
{
|
||
struct breakpoint *b;
|
||
b = set_raw_breakpoint (sal);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->type = bp_breakpoint;
|
||
b->cond = 0;
|
||
b->thread = -1;
|
||
return b;
|
||
}
|
||
|
||
#if 0
|
||
/* These aren't used; I don't know what they were for. */
|
||
/* Disable breakpoints on all catch clauses described in ARGS. */
|
||
static void
|
||
disable_catch (args)
|
||
char *args;
|
||
{
|
||
/* Map the disable command to catch clauses described in ARGS. */
|
||
}
|
||
|
||
/* Enable breakpoints on all catch clauses described in ARGS. */
|
||
static void
|
||
enable_catch (args)
|
||
char *args;
|
||
{
|
||
/* Map the disable command to catch clauses described in ARGS. */
|
||
}
|
||
|
||
/* Delete breakpoints on all catch clauses in the active scope. */
|
||
static void
|
||
delete_catch (args)
|
||
char *args;
|
||
{
|
||
/* Map the delete command to catch clauses described in ARGS. */
|
||
}
|
||
#endif /* 0 */
|
||
|
||
static void
|
||
catch_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
catch_command_1 (arg, 0, from_tty);
|
||
}
|
||
|
||
|
||
static void
|
||
tcatch_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
catch_command_1 (arg, 1, from_tty);
|
||
}
|
||
|
||
|
||
static void
|
||
clear_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
register struct breakpoint *b, *b1;
|
||
int default_match;
|
||
struct symtabs_and_lines sals;
|
||
struct symtab_and_line sal;
|
||
register struct breakpoint *found;
|
||
int i;
|
||
|
||
if (arg)
|
||
{
|
||
sals = decode_line_spec (arg, 1);
|
||
default_match = 0;
|
||
}
|
||
else
|
||
{
|
||
sals.sals = (struct symtab_and_line *)
|
||
xmalloc (sizeof (struct symtab_and_line));
|
||
INIT_SAL (&sal); /* initialize to zeroes */
|
||
sal.line = default_breakpoint_line;
|
||
sal.symtab = default_breakpoint_symtab;
|
||
sal.pc = default_breakpoint_address;
|
||
if (sal.symtab == 0)
|
||
error ("No source file specified.");
|
||
|
||
sals.sals[0] = sal;
|
||
sals.nelts = 1;
|
||
|
||
default_match = 1;
|
||
}
|
||
|
||
/* For each line spec given, delete bps which correspond
|
||
to it. We do this in two loops: the first loop looks at
|
||
the initial bp(s) in the chain which should be deleted,
|
||
the second goes down the rest of the chain looking ahead
|
||
one so it can take those bps off the chain without messing
|
||
up the chain. */
|
||
|
||
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
/* If exact pc given, clear bpts at that pc.
|
||
If line given (pc == 0), clear all bpts on specified line.
|
||
If defaulting, clear all bpts on default line
|
||
or at default pc.
|
||
|
||
defaulting sal.pc != 0 tests to do
|
||
|
||
0 1 pc
|
||
1 1 pc _and_ line
|
||
0 0 line
|
||
1 0 <can't happen> */
|
||
|
||
sal = sals.sals[i];
|
||
found = (struct breakpoint *) 0;
|
||
|
||
|
||
while (breakpoint_chain
|
||
/* Why don't we check here that this is not
|
||
a watchpoint, etc., as we do below?
|
||
I can't make it fail, but don't know
|
||
what's stopping the failure: a watchpoint
|
||
of the same address as "sal.pc" should
|
||
wind up being deleted. */
|
||
|
||
&& ( ((sal.pc && (breakpoint_chain->address == sal.pc)) &&
|
||
(overlay_debugging == 0 ||
|
||
breakpoint_chain->section == sal.section))
|
||
|| ((default_match || (0 == sal.pc))
|
||
&& breakpoint_chain->source_file != NULL
|
||
&& sal.symtab != NULL
|
||
&& STREQ (breakpoint_chain->source_file, sal.symtab->filename)
|
||
&& breakpoint_chain->line_number == sal.line)))
|
||
|
||
{
|
||
b1 = breakpoint_chain;
|
||
breakpoint_chain = b1->next;
|
||
b1->next = found;
|
||
found = b1;
|
||
}
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
|
||
while (b->next
|
||
&& b->next->type != bp_none
|
||
&& b->next->type != bp_watchpoint
|
||
&& b->next->type != bp_hardware_watchpoint
|
||
&& b->next->type != bp_read_watchpoint
|
||
&& b->next->type != bp_access_watchpoint
|
||
&& ( ((sal.pc && (b->next->address == sal.pc)) &&
|
||
(overlay_debugging == 0 ||
|
||
b->next->section == sal.section))
|
||
|| ((default_match || (0 == sal.pc))
|
||
&& b->next->source_file != NULL
|
||
&& sal.symtab != NULL
|
||
&& STREQ (b->next->source_file, sal.symtab->filename)
|
||
&& b->next->line_number == sal.line)))
|
||
|
||
|
||
{
|
||
b1 = b->next;
|
||
b->next = b1->next;
|
||
b1->next = found;
|
||
found = b1;
|
||
}
|
||
|
||
if (found == 0)
|
||
{
|
||
if (arg)
|
||
error ("No breakpoint at %s.", arg);
|
||
else
|
||
error ("No breakpoint at this line.");
|
||
}
|
||
|
||
if (found->next) from_tty = 1; /* Always report if deleted more than one */
|
||
if (from_tty) printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : "");
|
||
breakpoints_changed ();
|
||
while (found)
|
||
{
|
||
if (from_tty) printf_unfiltered ("%d ", found->number);
|
||
b1 = found->next;
|
||
delete_breakpoint (found);
|
||
found = b1;
|
||
}
|
||
if (from_tty) putchar_unfiltered ('\n');
|
||
}
|
||
free ((PTR)sals.sals);
|
||
}
|
||
|
||
/* Delete breakpoint in BS if they are `delete' breakpoints and
|
||
all breakpoints that are marked for deletion, whether hit or not.
|
||
This is called after any breakpoint is hit, or after errors. */
|
||
|
||
void
|
||
breakpoint_auto_delete (bs)
|
||
bpstat bs;
|
||
{
|
||
struct breakpoint *b, *temp;
|
||
|
||
for (; bs; bs = bs->next)
|
||
if (bs->breakpoint_at && bs->breakpoint_at->disposition == del
|
||
&& bs->stop)
|
||
delete_breakpoint (bs->breakpoint_at);
|
||
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
{
|
||
if (b->disposition == del_at_next_stop)
|
||
delete_breakpoint (b);
|
||
}
|
||
}
|
||
|
||
/* Delete a breakpoint and clean up all traces of it in the data structures. */
|
||
|
||
void
|
||
delete_breakpoint (bpt)
|
||
struct breakpoint *bpt;
|
||
{
|
||
register struct breakpoint *b;
|
||
register bpstat bs;
|
||
|
||
if (bpt == NULL)
|
||
error ("Internal error (attempted to delete a NULL breakpoint)");
|
||
|
||
|
||
/* Has this bp already been deleted? This can happen because multiple
|
||
lists can hold pointers to bp's. bpstat lists are especial culprits.
|
||
|
||
One example of this happening is a watchpoint's scope bp. When the
|
||
scope bp triggers, we notice that the watchpoint is out of scope, and
|
||
delete it. We also delete its scope bp. But the scope bp is marked
|
||
"auto-deleting", and is already on a bpstat. That bpstat is then
|
||
checked for auto-deleting bp's, which are deleted.
|
||
|
||
A real solution to this problem might involve reference counts in bp's,
|
||
and/or giving them pointers back to their referencing bpstat's, and
|
||
teaching delete_breakpoint to only free a bp's storage when no more
|
||
references were extent. A cheaper bandaid was chosen. */
|
||
if (bpt->type == bp_none)
|
||
return;
|
||
|
||
if (delete_breakpoint_hook)
|
||
delete_breakpoint_hook (bpt);
|
||
|
||
if (bpt->inserted)
|
||
remove_breakpoint (bpt, mark_uninserted);
|
||
|
||
if (breakpoint_chain == bpt)
|
||
breakpoint_chain = bpt->next;
|
||
|
||
/* If we have callback-style exception catchpoints, don't go through
|
||
the adjustments to the C++ runtime library etc. if the inferior
|
||
isn't actually running. target_enable_exception_callback for a
|
||
null target ops vector gives an undesirable error message, so we
|
||
check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
|
||
exceptions are supported in this way, it's OK for now. FIXME */
|
||
if (ep_is_exception_catchpoint (bpt) && target_has_execution)
|
||
{
|
||
static char message1[] = "Error in deleting catchpoint %d:\n";
|
||
static char message[sizeof (message1) + 30];
|
||
args_for_catchpoint_enable args;
|
||
|
||
sprintf (message, message1, bpt->number); /* Format possible error msg */
|
||
args.kind = bpt->type == bp_catch_catch ? EX_EVENT_CATCH : EX_EVENT_THROW;
|
||
args.enable = 0;
|
||
(void) catch_errors ((int (*) PARAMS ((char *))) cover_target_enable_exception_callback,
|
||
(char *) &args,
|
||
message, RETURN_MASK_ALL);
|
||
}
|
||
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->next == bpt)
|
||
{
|
||
b->next = bpt->next;
|
||
break;
|
||
}
|
||
|
||
/* Before turning off the visuals for the bp, check to see that
|
||
there are no other bps at the same address. */
|
||
if (tui_version)
|
||
{
|
||
int clearIt;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
clearIt = (b->address != bpt->address);
|
||
if (!clearIt)
|
||
break;
|
||
}
|
||
|
||
if (clearIt)
|
||
{
|
||
TUIDO(((TuiOpaqueFuncPtr)tui_vAllSetHasBreakAt, bpt, 0));
|
||
TUIDO(((TuiOpaqueFuncPtr)tuiUpdateAllExecInfos));
|
||
}
|
||
}
|
||
|
||
check_duplicates (bpt->address, bpt->section);
|
||
/* If this breakpoint was inserted, and there is another breakpoint
|
||
at the same address, we need to insert the other breakpoint. */
|
||
if (bpt->inserted
|
||
&& bpt->type != bp_hardware_watchpoint
|
||
&& bpt->type != bp_read_watchpoint
|
||
&& bpt->type != bp_access_watchpoint
|
||
&& bpt->type != bp_catch_fork
|
||
&& bpt->type != bp_catch_vfork
|
||
&& bpt->type != bp_catch_exec)
|
||
{
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->address == bpt->address
|
||
&& b->section == bpt->section
|
||
&& !b->duplicate
|
||
&& b->enable != disabled
|
||
&& b->enable != shlib_disabled
|
||
&& b->enable != call_disabled)
|
||
{
|
||
int val;
|
||
val = target_insert_breakpoint (b->address, b->shadow_contents);
|
||
if (val != 0)
|
||
{
|
||
target_terminal_ours_for_output ();
|
||
fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number);
|
||
memory_error (val, b->address); /* which bombs us out */
|
||
}
|
||
else
|
||
b->inserted = 1;
|
||
}
|
||
}
|
||
|
||
free_command_lines (&bpt->commands);
|
||
if (bpt->cond)
|
||
free (bpt->cond);
|
||
if (bpt->cond_string != NULL)
|
||
free (bpt->cond_string);
|
||
if (bpt->addr_string != NULL)
|
||
free (bpt->addr_string);
|
||
if (bpt->exp != NULL)
|
||
free (bpt->exp);
|
||
if (bpt->exp_string != NULL)
|
||
free (bpt->exp_string);
|
||
if (bpt->val != NULL)
|
||
value_free (bpt->val);
|
||
if (bpt->source_file != NULL)
|
||
free (bpt->source_file);
|
||
if (bpt->dll_pathname != NULL)
|
||
free (bpt->dll_pathname);
|
||
if (bpt->triggered_dll_pathname != NULL)
|
||
free (bpt->triggered_dll_pathname);
|
||
if (bpt->exec_pathname != NULL)
|
||
free (bpt->exec_pathname);
|
||
|
||
/* Be sure no bpstat's are pointing at it after it's been freed. */
|
||
/* FIXME, how can we find all bpstat's?
|
||
We just check stop_bpstat for now. */
|
||
for (bs = stop_bpstat; bs; bs = bs->next)
|
||
if (bs->breakpoint_at == bpt)
|
||
{
|
||
bs->breakpoint_at = NULL;
|
||
|
||
/* we'd call bpstat_clear_actions, but that free's stuff and due
|
||
to the multiple pointers pointing to one item with no
|
||
reference counts found anywhere through out the bpstat's (how
|
||
do you spell fragile?), we don't want to free things twice --
|
||
better a memory leak than a corrupt malloc pool! */
|
||
bs->commands = NULL;
|
||
bs->old_val = NULL;
|
||
}
|
||
/* On the chance that someone will soon try again to delete this same
|
||
bp, we mark it as deleted before freeing its storage. */
|
||
bpt->type = bp_none;
|
||
|
||
free ((PTR)bpt);
|
||
}
|
||
|
||
void
|
||
delete_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
struct breakpoint *b, *temp;
|
||
|
||
if (arg == 0)
|
||
{
|
||
int breaks_to_delete = 0;
|
||
|
||
/* Delete all breakpoints if no argument.
|
||
Do not delete internal or call-dummy breakpoints, these
|
||
have to be deleted with an explicit breakpoint number argument. */
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->type != bp_call_dummy &&
|
||
b->type != bp_shlib_event &&
|
||
b->number >= 0)
|
||
breaks_to_delete = 1;
|
||
}
|
||
|
||
/* Ask user only if there are some breakpoints to delete. */
|
||
if (!from_tty
|
||
|| (breaks_to_delete && query ("Delete all breakpoints? ")))
|
||
{
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
{
|
||
if (b->type != bp_call_dummy &&
|
||
b->type != bp_shlib_event &&
|
||
b->number >= 0)
|
||
delete_breakpoint (b);
|
||
}
|
||
}
|
||
}
|
||
else
|
||
map_breakpoint_numbers (arg, delete_breakpoint);
|
||
}
|
||
|
||
/* Reset a breakpoint given it's struct breakpoint * BINT.
|
||
The value we return ends up being the return value from catch_errors.
|
||
Unused in this case. */
|
||
|
||
static int
|
||
breakpoint_re_set_one (bint)
|
||
char *bint;
|
||
{
|
||
struct breakpoint *b = (struct breakpoint *)bint; /* get past catch_errs */
|
||
struct value *mark;
|
||
int i;
|
||
struct symtabs_and_lines sals;
|
||
char *s;
|
||
enum enable save_enable;
|
||
|
||
switch (b->type)
|
||
{
|
||
case bp_none:
|
||
warning ("attempted to reset apparently deleted breakpoint #%d?\n", b->number);
|
||
return 0;
|
||
case bp_breakpoint:
|
||
case bp_hardware_breakpoint:
|
||
case bp_catch_load:
|
||
case bp_catch_unload:
|
||
if (b->addr_string == NULL)
|
||
{
|
||
/* Anything without a string can't be re-set. */
|
||
delete_breakpoint (b);
|
||
return 0;
|
||
}
|
||
/* In case we have a problem, disable this breakpoint. We'll restore
|
||
its status if we succeed. */
|
||
save_enable = b->enable;
|
||
b->enable = disabled;
|
||
|
||
set_language (b->language);
|
||
input_radix = b->input_radix;
|
||
s = b->addr_string;
|
||
sals = decode_line_1 (&s, 1, (struct symtab *)NULL, 0, (char ***)NULL);
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
resolve_sal_pc (&sals.sals[i]);
|
||
|
||
/* Reparse conditions, they might contain references to the
|
||
old symtab. */
|
||
if (b->cond_string != NULL)
|
||
{
|
||
s = b->cond_string;
|
||
if (b->cond)
|
||
free ((PTR)b->cond);
|
||
b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0);
|
||
}
|
||
|
||
/* We need to re-set the breakpoint if the address changes...*/
|
||
if (b->address != sals.sals[i].pc
|
||
/* ...or new and old breakpoints both have source files, and
|
||
the source file name or the line number changes... */
|
||
|| (b->source_file != NULL
|
||
&& sals.sals[i].symtab != NULL
|
||
&& (!STREQ (b->source_file, sals.sals[i].symtab->filename)
|
||
|| b->line_number != sals.sals[i].line)
|
||
)
|
||
/* ...or we switch between having a source file and not having
|
||
one. */
|
||
|| ((b->source_file == NULL) != (sals.sals[i].symtab == NULL))
|
||
)
|
||
{
|
||
if (b->source_file != NULL)
|
||
free (b->source_file);
|
||
if (sals.sals[i].symtab == NULL)
|
||
b->source_file = NULL;
|
||
else
|
||
b->source_file =
|
||
savestring (sals.sals[i].symtab->filename,
|
||
strlen (sals.sals[i].symtab->filename));
|
||
b->line_number = sals.sals[i].line;
|
||
b->address = sals.sals[i].pc;
|
||
|
||
/* Used to check for duplicates here, but that can
|
||
cause trouble, as it doesn't check for disable
|
||
breakpoints. */
|
||
|
||
mention (b);
|
||
|
||
/* Might be better to do this just once per breakpoint_re_set,
|
||
rather than once for every breakpoint. */
|
||
breakpoints_changed ();
|
||
}
|
||
b->section = sals.sals[i].section;
|
||
b->enable = save_enable; /* Restore it, this worked. */
|
||
|
||
|
||
/* Now that this is re-enabled, check_duplicates
|
||
can be used. */
|
||
check_duplicates (b->address, b->section);
|
||
|
||
}
|
||
free ((PTR)sals.sals);
|
||
break;
|
||
|
||
case bp_watchpoint:
|
||
case bp_hardware_watchpoint:
|
||
case bp_read_watchpoint:
|
||
case bp_access_watchpoint:
|
||
innermost_block = NULL;
|
||
/* The issue arises of what context to evaluate this in. The same
|
||
one as when it was set, but what does that mean when symbols have
|
||
been re-read? We could save the filename and functionname, but
|
||
if the context is more local than that, the best we could do would
|
||
be something like how many levels deep and which index at that
|
||
particular level, but that's going to be less stable than filenames
|
||
or functionnames. */
|
||
/* So for now, just use a global context. */
|
||
if (b->exp)
|
||
free ((PTR)b->exp);
|
||
b->exp = parse_expression (b->exp_string);
|
||
b->exp_valid_block = innermost_block;
|
||
mark = value_mark ();
|
||
if (b->val)
|
||
value_free (b->val);
|
||
b->val = evaluate_expression (b->exp);
|
||
release_value (b->val);
|
||
if (VALUE_LAZY (b->val))
|
||
value_fetch_lazy (b->val);
|
||
|
||
if (b->cond_string != NULL)
|
||
{
|
||
s = b->cond_string;
|
||
if (b->cond)
|
||
free ((PTR)b->cond);
|
||
b->cond = parse_exp_1 (&s, (struct block *)0, 0);
|
||
}
|
||
if (b->enable == enabled)
|
||
mention (b);
|
||
value_free_to_mark (mark);
|
||
break;
|
||
case bp_catch_catch:
|
||
case bp_catch_throw:
|
||
break;
|
||
/* We needn't really do anything to reset these, since the mask
|
||
that requests them is unaffected by e.g., new libraries being
|
||
loaded. */
|
||
case bp_catch_fork:
|
||
case bp_catch_vfork:
|
||
case bp_catch_exec:
|
||
break;
|
||
|
||
default:
|
||
printf_filtered ("Deleting unknown breakpoint type %d\n", b->type);
|
||
/* fall through */
|
||
/* Delete longjmp breakpoints, they will be reset later by
|
||
breakpoint_re_set. */
|
||
case bp_longjmp:
|
||
case bp_longjmp_resume:
|
||
delete_breakpoint (b);
|
||
break;
|
||
|
||
/* This breakpoint is special, it's set up when the inferior
|
||
starts and we really don't want to touch it. */
|
||
case bp_shlib_event:
|
||
|
||
/* Keep temporary breakpoints, which can be encountered when we step
|
||
over a dlopen call and SOLIB_ADD is resetting the breakpoints.
|
||
Otherwise these should have been blown away via the cleanup chain
|
||
or by breakpoint_init_inferior when we rerun the executable. */
|
||
case bp_until:
|
||
case bp_finish:
|
||
case bp_watchpoint_scope:
|
||
case bp_call_dummy:
|
||
case bp_step_resume:
|
||
break;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Re-set all breakpoints after symbols have been re-loaded. */
|
||
void
|
||
breakpoint_re_set ()
|
||
{
|
||
struct breakpoint *b, *temp;
|
||
enum language save_language;
|
||
int save_input_radix;
|
||
static char message1[] = "Error in re-setting breakpoint %d:\n";
|
||
char message[sizeof (message1) + 30 /* slop */];
|
||
|
||
save_language = current_language->la_language;
|
||
save_input_radix = input_radix;
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
{
|
||
sprintf (message, message1, b->number); /* Format possible error msg */
|
||
catch_errors ((int (*) PARAMS ((char *))) breakpoint_re_set_one, (char *) b, message,
|
||
RETURN_MASK_ALL);
|
||
}
|
||
set_language (save_language);
|
||
input_radix = save_input_radix;
|
||
|
||
#ifdef GET_LONGJMP_TARGET
|
||
create_longjmp_breakpoint ("longjmp");
|
||
create_longjmp_breakpoint ("_longjmp");
|
||
create_longjmp_breakpoint ("siglongjmp");
|
||
create_longjmp_breakpoint ("_siglongjmp");
|
||
create_longjmp_breakpoint (NULL);
|
||
#endif
|
||
|
||
#if 0
|
||
/* Took this out (temporarily at least), since it produces an extra
|
||
blank line at startup. This messes up the gdbtests. -PB */
|
||
/* Blank line to finish off all those mention() messages we just printed. */
|
||
printf_filtered ("\n");
|
||
#endif
|
||
}
|
||
|
||
/* Set ignore-count of breakpoint number BPTNUM to COUNT.
|
||
If from_tty is nonzero, it prints a message to that effect,
|
||
which ends with a period (no newline). */
|
||
|
||
/* Reset the thread number of this breakpoint:
|
||
|
||
- If the breakpoint is for all threads, leave it as-is.
|
||
- Else, reset it to the current thread for inferior_pid. */
|
||
void
|
||
breakpoint_re_set_thread (b)
|
||
struct breakpoint * b;
|
||
{
|
||
if (b->thread != -1)
|
||
{
|
||
if (in_thread_list (inferior_pid))
|
||
b->thread = pid_to_thread_id (inferior_pid);
|
||
}
|
||
}
|
||
|
||
void
|
||
set_ignore_count (bptnum, count, from_tty)
|
||
int bptnum, count, from_tty;
|
||
{
|
||
register struct breakpoint *b;
|
||
|
||
if (count < 0)
|
||
count = 0;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->number == bptnum)
|
||
{
|
||
b->ignore_count = count;
|
||
if (!from_tty)
|
||
return;
|
||
else if (count == 0)
|
||
printf_filtered ("Will stop next time breakpoint %d is reached.",
|
||
bptnum);
|
||
else if (count == 1)
|
||
printf_filtered ("Will ignore next crossing of breakpoint %d.",
|
||
bptnum);
|
||
else
|
||
printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
|
||
count, bptnum);
|
||
breakpoints_changed ();
|
||
return;
|
||
}
|
||
|
||
error ("No breakpoint number %d.", bptnum);
|
||
}
|
||
|
||
/* Clear the ignore counts of all breakpoints. */
|
||
void
|
||
breakpoint_clear_ignore_counts ()
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
b->ignore_count = 0;
|
||
}
|
||
|
||
/* Command to set ignore-count of breakpoint N to COUNT. */
|
||
|
||
static void
|
||
ignore_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
char *p = args;
|
||
register int num;
|
||
|
||
if (p == 0)
|
||
error_no_arg ("a breakpoint number");
|
||
|
||
num = get_number (&p);
|
||
|
||
if (*p == 0)
|
||
error ("Second argument (specified ignore-count) is missing.");
|
||
|
||
set_ignore_count (num,
|
||
longest_to_int (value_as_long (parse_and_eval (p))),
|
||
from_tty);
|
||
printf_filtered ("\n");
|
||
breakpoints_changed ();
|
||
}
|
||
|
||
/* Call FUNCTION on each of the breakpoints
|
||
whose numbers are given in ARGS. */
|
||
|
||
static void
|
||
map_breakpoint_numbers (args, function)
|
||
char *args;
|
||
void (*function) PARAMS ((struct breakpoint *));
|
||
{
|
||
register char *p = args;
|
||
char *p1;
|
||
register int num;
|
||
register struct breakpoint *b;
|
||
|
||
if (p == 0)
|
||
error_no_arg ("one or more breakpoint numbers");
|
||
|
||
while (*p)
|
||
{
|
||
p1 = p;
|
||
|
||
num = get_number (&p1);
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->number == num)
|
||
{
|
||
struct breakpoint *related_breakpoint = b->related_breakpoint;
|
||
function (b);
|
||
if (related_breakpoint)
|
||
function (related_breakpoint);
|
||
goto win;
|
||
}
|
||
printf_unfiltered ("No breakpoint number %d.\n", num);
|
||
win:
|
||
p = p1;
|
||
}
|
||
}
|
||
|
||
void
|
||
disable_breakpoint (bpt)
|
||
struct breakpoint *bpt;
|
||
{
|
||
/* Never disable a watchpoint scope breakpoint; we want to
|
||
hit them when we leave scope so we can delete both the
|
||
watchpoint and its scope breakpoint at that time. */
|
||
if (bpt->type == bp_watchpoint_scope)
|
||
return;
|
||
|
||
bpt->enable = disabled;
|
||
|
||
check_duplicates (bpt->address, bpt->section);
|
||
|
||
if (modify_breakpoint_hook)
|
||
modify_breakpoint_hook (bpt);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
disable_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
register struct breakpoint *bpt;
|
||
if (args == 0)
|
||
ALL_BREAKPOINTS (bpt)
|
||
switch (bpt->type)
|
||
{
|
||
case bp_none:
|
||
warning ("attempted to disable apparently deleted breakpoint #%d?\n", bpt->number);
|
||
continue;
|
||
case bp_breakpoint:
|
||
case bp_catch_load:
|
||
case bp_catch_unload:
|
||
case bp_catch_fork:
|
||
case bp_catch_vfork:
|
||
case bp_catch_exec:
|
||
case bp_catch_catch:
|
||
case bp_catch_throw:
|
||
case bp_hardware_breakpoint:
|
||
case bp_watchpoint:
|
||
case bp_hardware_watchpoint:
|
||
case bp_read_watchpoint:
|
||
case bp_access_watchpoint:
|
||
disable_breakpoint (bpt);
|
||
default:
|
||
continue;
|
||
}
|
||
else
|
||
map_breakpoint_numbers (args, disable_breakpoint);
|
||
}
|
||
|
||
static void
|
||
do_enable_breakpoint (bpt, disposition)
|
||
struct breakpoint *bpt;
|
||
enum bpdisp disposition;
|
||
{
|
||
struct frame_info *save_selected_frame = NULL;
|
||
int save_selected_frame_level = -1;
|
||
int target_resources_ok, other_type_used;
|
||
struct value *mark;
|
||
|
||
if (bpt->type == bp_hardware_breakpoint)
|
||
{
|
||
int i;
|
||
i = hw_breakpoint_used_count();
|
||
target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT(
|
||
bp_hardware_breakpoint, i+1, 0);
|
||
if (target_resources_ok == 0)
|
||
error ("No hardware breakpoint support in the target.");
|
||
else if (target_resources_ok < 0)
|
||
error ("Hardware breakpoints used exceeds limit.");
|
||
}
|
||
|
||
bpt->enable = enabled;
|
||
bpt->disposition = disposition;
|
||
check_duplicates (bpt->address, bpt->section);
|
||
breakpoints_changed ();
|
||
|
||
if (bpt->type == bp_watchpoint || bpt->type == bp_hardware_watchpoint ||
|
||
bpt->type == bp_read_watchpoint || bpt->type == bp_access_watchpoint)
|
||
{
|
||
if (bpt->exp_valid_block != NULL)
|
||
{
|
||
struct frame_info *fr =
|
||
|
||
/* Ensure that we have the current frame. Else, this
|
||
next query may pessimistically be answered as, "No,
|
||
not within current scope". */
|
||
get_current_frame ();
|
||
fr = find_frame_addr_in_frame_chain (bpt->watchpoint_frame);
|
||
if (fr == NULL)
|
||
{
|
||
printf_filtered ("\
|
||
Cannot enable watchpoint %d because the block in which its expression\n\
|
||
is valid is not currently in scope.\n", bpt->number);
|
||
bpt->enable = disabled;
|
||
return;
|
||
}
|
||
|
||
save_selected_frame = selected_frame;
|
||
save_selected_frame_level = selected_frame_level;
|
||
select_frame (fr, -1);
|
||
}
|
||
|
||
value_free (bpt->val);
|
||
mark = value_mark ();
|
||
bpt->val = evaluate_expression (bpt->exp);
|
||
release_value (bpt->val);
|
||
if (VALUE_LAZY (bpt->val))
|
||
value_fetch_lazy (bpt->val);
|
||
|
||
if (bpt->type == bp_hardware_watchpoint ||
|
||
bpt->type == bp_read_watchpoint ||
|
||
bpt->type == bp_access_watchpoint)
|
||
{
|
||
int i = hw_watchpoint_used_count (bpt->type, &other_type_used);
|
||
int mem_cnt = can_use_hardware_watchpoint (bpt->val);
|
||
|
||
/* Hack around 'unused var' error for some targets here */
|
||
(void) mem_cnt, i;
|
||
target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT(
|
||
bpt->type, i + mem_cnt, other_type_used);
|
||
/* we can consider of type is bp_hardware_watchpoint, convert to
|
||
bp_watchpoint in the following condition */
|
||
if (target_resources_ok < 0)
|
||
{
|
||
printf_filtered("\
|
||
Cannot enable watchpoint %d because target watch resources\n\
|
||
have been allocated for other watchpoints.\n", bpt->number);
|
||
bpt->enable = disabled;
|
||
value_free_to_mark (mark);
|
||
return;
|
||
}
|
||
}
|
||
|
||
if (save_selected_frame_level >= 0)
|
||
select_and_print_frame (save_selected_frame, save_selected_frame_level);
|
||
value_free_to_mark (mark);
|
||
}
|
||
if (modify_breakpoint_hook)
|
||
modify_breakpoint_hook (bpt);
|
||
}
|
||
|
||
void
|
||
enable_breakpoint (bpt)
|
||
struct breakpoint *bpt;
|
||
{
|
||
do_enable_breakpoint (bpt, bpt->disposition);
|
||
}
|
||
|
||
/* The enable command enables the specified breakpoints (or all defined
|
||
breakpoints) so they once again become (or continue to be) effective
|
||
in stopping the inferior. */
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
enable_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
register struct breakpoint *bpt;
|
||
if (args == 0)
|
||
ALL_BREAKPOINTS (bpt)
|
||
switch (bpt->type)
|
||
{
|
||
case bp_none:
|
||
warning ("attempted to enable apparently deleted breakpoint #%d?\n", bpt->number);
|
||
continue;
|
||
case bp_breakpoint:
|
||
case bp_catch_load:
|
||
case bp_catch_unload:
|
||
case bp_catch_fork:
|
||
case bp_catch_vfork:
|
||
case bp_catch_exec:
|
||
case bp_catch_catch:
|
||
case bp_catch_throw:
|
||
case bp_hardware_breakpoint:
|
||
case bp_watchpoint:
|
||
case bp_hardware_watchpoint:
|
||
case bp_read_watchpoint:
|
||
case bp_access_watchpoint:
|
||
enable_breakpoint (bpt);
|
||
default:
|
||
continue;
|
||
}
|
||
else
|
||
map_breakpoint_numbers (args, enable_breakpoint);
|
||
}
|
||
|
||
static void
|
||
enable_once_breakpoint (bpt)
|
||
struct breakpoint *bpt;
|
||
{
|
||
do_enable_breakpoint (bpt, disable);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
enable_once_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
map_breakpoint_numbers (args, enable_once_breakpoint);
|
||
}
|
||
|
||
static void
|
||
enable_delete_breakpoint (bpt)
|
||
struct breakpoint *bpt;
|
||
{
|
||
do_enable_breakpoint (bpt, del);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
enable_delete_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
map_breakpoint_numbers (args, enable_delete_breakpoint);
|
||
}
|
||
|
||
/* Use default_breakpoint_'s, or nothing if they aren't valid. */
|
||
|
||
struct symtabs_and_lines
|
||
decode_line_spec_1 (string, funfirstline)
|
||
char *string;
|
||
int funfirstline;
|
||
{
|
||
struct symtabs_and_lines sals;
|
||
if (string == 0)
|
||
error ("Empty line specification.");
|
||
if (default_breakpoint_valid)
|
||
sals = decode_line_1 (&string, funfirstline,
|
||
default_breakpoint_symtab, default_breakpoint_line,
|
||
(char ***)NULL);
|
||
else
|
||
sals = decode_line_1 (&string, funfirstline,
|
||
(struct symtab *)NULL, 0, (char ***)NULL);
|
||
if (*string)
|
||
error ("Junk at end of line specification: %s", string);
|
||
return sals;
|
||
}
|
||
|
||
void
|
||
_initialize_breakpoint ()
|
||
{
|
||
struct cmd_list_element *c;
|
||
|
||
breakpoint_chain = 0;
|
||
/* Don't bother to call set_breakpoint_count. $bpnum isn't useful
|
||
before a breakpoint is set. */
|
||
breakpoint_count = 0;
|
||
|
||
add_com ("ignore", class_breakpoint, ignore_command,
|
||
"Set ignore-count of breakpoint number N to COUNT.\n\
|
||
Usage is `ignore N COUNT'.");
|
||
if (xdb_commands)
|
||
add_com_alias("bc", "ignore", class_breakpoint, 1);
|
||
|
||
add_com ("commands", class_breakpoint, commands_command,
|
||
"Set commands to be executed when a breakpoint is hit.\n\
|
||
Give breakpoint number as argument after \"commands\".\n\
|
||
With no argument, the targeted breakpoint is the last one set.\n\
|
||
The commands themselves follow starting on the next line.\n\
|
||
Type a line containing \"end\" to indicate the end of them.\n\
|
||
Give \"silent\" as the first line to make the breakpoint silent;\n\
|
||
then no output is printed when it is hit, except what the commands print.");
|
||
|
||
add_com ("condition", class_breakpoint, condition_command,
|
||
"Specify breakpoint number N to break only if COND is true.\n\
|
||
Usage is `condition N COND', where N is an integer and COND is an\n\
|
||
expression to be evaluated whenever breakpoint N is reached. ");
|
||
|
||
add_com ("tbreak", class_breakpoint, tbreak_command,
|
||
"Set a temporary breakpoint. Args like \"break\" command.\n\
|
||
Like \"break\" except the breakpoint is only temporary,\n\
|
||
so it will be deleted when hit. Equivalent to \"break\" followed\n\
|
||
by using \"enable delete\" on the breakpoint number.");
|
||
add_com("txbreak", class_breakpoint, tbreak_at_finish_command,
|
||
"Set temporary breakpoint at procedure exit. Either there should\n\
|
||
be no argument or the argument must be a depth.\n");
|
||
|
||
add_com ("hbreak", class_breakpoint, hbreak_command,
|
||
"Set a hardware assisted breakpoint. Args like \"break\" command.\n\
|
||
Like \"break\" except the breakpoint requires hardware support,\n\
|
||
some target hardware may not have this support.");
|
||
|
||
add_com ("thbreak", class_breakpoint, thbreak_command,
|
||
"Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
|
||
Like \"hbreak\" except the breakpoint is only temporary,\n\
|
||
so it will be deleted when hit.");
|
||
|
||
add_prefix_cmd ("enable", class_breakpoint, enable_command,
|
||
"Enable some breakpoints.\n\
|
||
Give breakpoint numbers (separated by spaces) as arguments.\n\
|
||
With no subcommand, breakpoints are enabled until you command otherwise.\n\
|
||
This is used to cancel the effect of the \"disable\" command.\n\
|
||
With a subcommand you can enable temporarily.",
|
||
&enablelist, "enable ", 1, &cmdlist);
|
||
if (xdb_commands)
|
||
add_com("ab", class_breakpoint, enable_command,
|
||
"Enable some breakpoints.\n\
|
||
Give breakpoint numbers (separated by spaces) as arguments.\n\
|
||
With no subcommand, breakpoints are enabled until you command otherwise.\n\
|
||
This is used to cancel the effect of the \"disable\" command.\n\
|
||
With a subcommand you can enable temporarily.");
|
||
|
||
add_com_alias ("en", "enable", class_breakpoint, 1);
|
||
|
||
add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command,
|
||
"Enable some breakpoints.\n\
|
||
Give breakpoint numbers (separated by spaces) as arguments.\n\
|
||
This is used to cancel the effect of the \"disable\" command.\n\
|
||
May be abbreviated to simply \"enable\".\n",
|
||
&enablebreaklist, "enable breakpoints ", 1, &enablelist);
|
||
|
||
add_cmd ("once", no_class, enable_once_command,
|
||
"Enable breakpoints for one hit. Give breakpoint numbers.\n\
|
||
If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
|
||
&enablebreaklist);
|
||
|
||
add_cmd ("delete", no_class, enable_delete_command,
|
||
"Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
|
||
If a breakpoint is hit while enabled in this fashion, it is deleted.",
|
||
&enablebreaklist);
|
||
|
||
add_cmd ("delete", no_class, enable_delete_command,
|
||
"Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
|
||
If a breakpoint is hit while enabled in this fashion, it is deleted.",
|
||
&enablelist);
|
||
|
||
add_cmd ("once", no_class, enable_once_command,
|
||
"Enable breakpoints for one hit. Give breakpoint numbers.\n\
|
||
If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
|
||
&enablelist);
|
||
|
||
add_prefix_cmd ("disable", class_breakpoint, disable_command,
|
||
"Disable some breakpoints.\n\
|
||
Arguments are breakpoint numbers with spaces in between.\n\
|
||
To disable all breakpoints, give no argument.\n\
|
||
A disabled breakpoint is not forgotten, but has no effect until reenabled.",
|
||
&disablelist, "disable ", 1, &cmdlist);
|
||
add_com_alias ("dis", "disable", class_breakpoint, 1);
|
||
add_com_alias ("disa", "disable", class_breakpoint, 1);
|
||
if (xdb_commands)
|
||
add_com("sb", class_breakpoint, disable_command,
|
||
"Disable some breakpoints.\n\
|
||
Arguments are breakpoint numbers with spaces in between.\n\
|
||
To disable all breakpoints, give no argument.\n\
|
||
A disabled breakpoint is not forgotten, but has no effect until reenabled.");
|
||
|
||
add_cmd ("breakpoints", class_alias, disable_command,
|
||
"Disable some breakpoints.\n\
|
||
Arguments are breakpoint numbers with spaces in between.\n\
|
||
To disable all breakpoints, give no argument.\n\
|
||
A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
|
||
This command may be abbreviated \"disable\".",
|
||
&disablelist);
|
||
|
||
add_prefix_cmd ("delete", class_breakpoint, delete_command,
|
||
"Delete some breakpoints or auto-display expressions.\n\
|
||
Arguments are breakpoint numbers with spaces in between.\n\
|
||
To delete all breakpoints, give no argument.\n\
|
||
\n\
|
||
Also a prefix command for deletion of other GDB objects.\n\
|
||
The \"unset\" command is also an alias for \"delete\".",
|
||
&deletelist, "delete ", 1, &cmdlist);
|
||
add_com_alias ("d", "delete", class_breakpoint, 1);
|
||
if (xdb_commands)
|
||
add_com ("db", class_breakpoint, delete_command,
|
||
"Delete some breakpoints.\n\
|
||
Arguments are breakpoint numbers with spaces in between.\n\
|
||
To delete all breakpoints, give no argument.\n");
|
||
|
||
add_cmd ("breakpoints", class_alias, delete_command,
|
||
"Delete some breakpoints or auto-display expressions.\n\
|
||
Arguments are breakpoint numbers with spaces in between.\n\
|
||
To delete all breakpoints, give no argument.\n\
|
||
This command may be abbreviated \"delete\".",
|
||
&deletelist);
|
||
|
||
add_com ("clear", class_breakpoint, clear_command,
|
||
concat ("Clear breakpoint at specified line or function.\n\
|
||
Argument may be line number, function name, or \"*\" and an address.\n\
|
||
If line number is specified, all breakpoints in that line are cleared.\n\
|
||
If function is specified, breakpoints at beginning of function are cleared.\n\
|
||
If an address is specified, breakpoints at that address are cleared.\n\n",
|
||
"With no argument, clears all breakpoints in the line that the selected frame\n\
|
||
is executing in.\n\
|
||
\n\
|
||
See also the \"delete\" command which clears breakpoints by number.", NULL));
|
||
|
||
add_com ("break", class_breakpoint, break_command,
|
||
concat ("Set breakpoint at specified line or function.\n\
|
||
Argument may be line number, function name, or \"*\" and an address.\n\
|
||
If line number is specified, break at start of code for that line.\n\
|
||
If function is specified, break at start of code for that function.\n\
|
||
If an address is specified, break at that exact address.\n",
|
||
"With no arg, uses current execution address of selected stack frame.\n\
|
||
This is useful for breaking on return to a stack frame.\n\
|
||
\n\
|
||
Multiple breakpoints at one place are permitted, and useful if conditional.\n\
|
||
\n\
|
||
Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL));
|
||
add_com_alias ("b", "break", class_run, 1);
|
||
add_com_alias ("br", "break", class_run, 1);
|
||
add_com_alias ("bre", "break", class_run, 1);
|
||
add_com_alias ("brea", "break", class_run, 1);
|
||
|
||
add_com("xbreak", class_breakpoint, break_at_finish_command,
|
||
concat("Set breakpoint at procedure exit. \n\
|
||
Argument may be function name, or \"*\" and an address.\n\
|
||
If function is specified, break at end of code for that function.\n\
|
||
If an address is specified, break at the end of the function that contains \n\
|
||
that exact address.\n",
|
||
"With no arg, uses current execution address of selected stack frame.\n\
|
||
This is useful for breaking on return to a stack frame.\n\
|
||
\n\
|
||
Multiple breakpoints at one place are permitted, and useful if conditional.\n\
|
||
\n\
|
||
Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL));
|
||
add_com_alias ("xb", "xbreak", class_breakpoint, 1);
|
||
add_com_alias ("xbr", "xbreak", class_breakpoint, 1);
|
||
add_com_alias ("xbre", "xbreak", class_breakpoint, 1);
|
||
add_com_alias ("xbrea", "xbreak", class_breakpoint, 1);
|
||
|
||
if (xdb_commands)
|
||
{
|
||
add_com_alias ("ba", "break", class_breakpoint, 1);
|
||
add_com_alias ("bu", "ubreak", class_breakpoint, 1);
|
||
add_com ("bx", class_breakpoint, break_at_finish_at_depth_command,
|
||
"Set breakpoint at procedure exit. Either there should\n\
|
||
be no argument or the argument must be a depth.\n");
|
||
}
|
||
|
||
if (dbx_commands)
|
||
{
|
||
add_abbrev_prefix_cmd("stop", class_breakpoint, stop_command,
|
||
"Break in function/address or break at a line in the current file.",
|
||
&stoplist, "stop ", 1, &cmdlist);
|
||
add_cmd("in", class_breakpoint, stopin_command,
|
||
"Break in function or address.\n", &stoplist);
|
||
add_cmd("at", class_breakpoint, stopat_command,
|
||
"Break at a line in the current file.\n", &stoplist);
|
||
add_com("status", class_info, breakpoints_info,
|
||
concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
|
||
The \"Type\" column indicates one of:\n\
|
||
\tbreakpoint - normal breakpoint\n\
|
||
\twatchpoint - watchpoint\n\
|
||
The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
|
||
the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
|
||
breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
|
||
address and file/line number respectively.\n\n",
|
||
"Convenience variable \"$_\" and default examine address for \"x\"\n\
|
||
are set to the address of the last breakpoint listed.\n\n\
|
||
Convenience variable \"$bpnum\" contains the number of the last\n\
|
||
breakpoint set.", NULL));
|
||
}
|
||
|
||
add_info ("breakpoints", breakpoints_info,
|
||
concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
|
||
The \"Type\" column indicates one of:\n\
|
||
\tbreakpoint - normal breakpoint\n\
|
||
\twatchpoint - watchpoint\n\
|
||
The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
|
||
the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
|
||
breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
|
||
address and file/line number respectively.\n\n",
|
||
"Convenience variable \"$_\" and default examine address for \"x\"\n\
|
||
are set to the address of the last breakpoint listed.\n\n\
|
||
Convenience variable \"$bpnum\" contains the number of the last\n\
|
||
breakpoint set.", NULL));
|
||
|
||
if (xdb_commands)
|
||
add_com("lb", class_breakpoint, breakpoints_info,
|
||
concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
|
||
The \"Type\" column indicates one of:\n\
|
||
\tbreakpoint - normal breakpoint\n\
|
||
\twatchpoint - watchpoint\n\
|
||
The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
|
||
the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
|
||
breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
|
||
address and file/line number respectively.\n\n",
|
||
"Convenience variable \"$_\" and default examine address for \"x\"\n\
|
||
are set to the address of the last breakpoint listed.\n\n\
|
||
Convenience variable \"$bpnum\" contains the number of the last\n\
|
||
breakpoint set.", NULL));
|
||
|
||
#if MAINTENANCE_CMDS
|
||
|
||
add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints,
|
||
concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
|
||
The \"Type\" column indicates one of:\n\
|
||
\tbreakpoint - normal breakpoint\n\
|
||
\twatchpoint - watchpoint\n\
|
||
\tlongjmp - internal breakpoint used to step through longjmp()\n\
|
||
\tlongjmp resume - internal breakpoint at the target of longjmp()\n\
|
||
\tuntil - internal breakpoint used by the \"until\" command\n\
|
||
\tfinish - internal breakpoint used by the \"finish\" command\n",
|
||
"The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
|
||
the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
|
||
breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
|
||
address and file/line number respectively.\n\n",
|
||
"Convenience variable \"$_\" and default examine address for \"x\"\n\
|
||
are set to the address of the last breakpoint listed.\n\n\
|
||
Convenience variable \"$bpnum\" contains the number of the last\n\
|
||
breakpoint set.", NULL),
|
||
&maintenanceinfolist);
|
||
|
||
#endif /* MAINTENANCE_CMDS */
|
||
|
||
add_com ("catch", class_breakpoint, catch_command,
|
||
"Set catchpoints to catch events.\n\
|
||
Raised signals may be caught:\n\
|
||
\tcatch signal - all signals\n\
|
||
\tcatch signal <signame> - a particular signal\n\
|
||
Raised exceptions may be caught:\n\
|
||
\tcatch throw - all exceptions, when thrown\n\
|
||
\tcatch throw <exceptname> - a particular exception, when thrown\n\
|
||
\tcatch catch - all exceptions, when caught\n\
|
||
\tcatch catch <exceptname> - a particular exception, when caught\n\
|
||
Thread or process events may be caught:\n\
|
||
\tcatch thread_start - any threads, just after creation\n\
|
||
\tcatch thread_exit - any threads, just before expiration\n\
|
||
\tcatch thread_join - any threads, just after joins\n\
|
||
Process events may be caught:\n\
|
||
\tcatch start - any processes, just after creation\n\
|
||
\tcatch exit - any processes, just before expiration\n\
|
||
\tcatch fork - calls to fork()\n\
|
||
\tcatch vfork - calls to vfork()\n\
|
||
\tcatch exec - calls to exec()\n\
|
||
Dynamically-linked library events may be caught:\n\
|
||
\tcatch load - loads of any library\n\
|
||
\tcatch load <libname> - loads of a particular library\n\
|
||
\tcatch unload - unloads of any library\n\
|
||
\tcatch unload <libname> - unloads of a particular library\n\
|
||
The act of your program's execution stopping may also be caught:\n\
|
||
\tcatch stop\n\n\
|
||
C++ exceptions may be caught:\n\
|
||
\tcatch throw - all exceptions, when thrown\n\
|
||
\tcatch catch - all exceptions, when caught\n\
|
||
\n\
|
||
Do \"help set follow-fork-mode\" for info on debugging your program\n\
|
||
after a fork or vfork is caught.\n\n\
|
||
Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
|
||
|
||
add_com ("tcatch", class_breakpoint, tcatch_command,
|
||
"Set temporary catchpoints to catch events.\n\
|
||
Args like \"catch\" command.\n\
|
||
Like \"catch\" except the catchpoint is only temporary,\n\
|
||
so it will be deleted when hit. Equivalent to \"catch\" followed\n\
|
||
by using \"enable delete\" on the catchpoint number.");
|
||
|
||
add_com ("watch", class_breakpoint, watch_command,
|
||
|
||
"Set a watchpoint for an expression.\n\
|
||
A watchpoint stops execution of your program whenever the value of\n\
|
||
an expression changes.");
|
||
|
||
add_com ("rwatch", class_breakpoint, rwatch_command,
|
||
"Set a read watchpoint for an expression.\n\
|
||
A watchpoint stops execution of your program whenever the value of\n\
|
||
an expression is read.");
|
||
|
||
add_com ("awatch", class_breakpoint, awatch_command,
|
||
"Set a watchpoint for an expression.\n\
|
||
A watchpoint stops execution of your program whenever the value of\n\
|
||
an expression is either read or written.");
|
||
|
||
add_info ("watchpoints", breakpoints_info,
|
||
"Synonym for ``info breakpoints''.");
|
||
|
||
|
||
c = add_set_cmd ("can-use-hw-watchpoints", class_support, var_zinteger,
|
||
(char *) &can_use_hw_watchpoints,
|
||
"Set debugger's willingness to use watchpoint hardware.\n\
|
||
If zero, gdb will not use hardware for new watchpoints, even if\n\
|
||
such is available. (However, any hardware watchpoints that were\n\
|
||
created before setting this to nonzero, will continue to use watchpoint\n\
|
||
hardware.)",
|
||
&setlist);
|
||
add_show_from_set (c, &showlist);
|
||
|
||
can_use_hw_watchpoints = 1;
|
||
}
|