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3204 lines
83 KiB
C
3204 lines
83 KiB
C
/* Everything about breakpoints, for GDB.
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Copyright 1986, 1987, 1989, 1990, 1991, 1992 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., 675 Mass Ave, Cambridge, MA 02139, 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 "ctype.h"
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#include "command.h"
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#include "inferior.h"
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#include "target.h"
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#include "language.h"
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#include <string.h>
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#include "demangle.h"
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/* local function prototypes */
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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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disable_breakpoint PARAMS ((struct breakpoint *));
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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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enable_breakpoint PARAMS ((struct breakpoint *));
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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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delete_command PARAMS ((char *, int));
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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 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 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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static 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));
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static void
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describe_other_breakpoints PARAMS ((CORE_ADDR));
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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 ((int));
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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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static void
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set_breakpoint_count PARAMS ((int));
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extern int addressprint; /* Print machine addresses? */
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extern int demangle; /* Print de-mangled symbol names? */
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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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/* 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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static int breakpoint_count;
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/* Set breakpoint count to NUM. */
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static 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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/* 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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/* Flag indicating extra verbosity for xgdb. */
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extern int xgdb_verbose;
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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 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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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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if (from_tty && input_from_terminal_p ())
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printf_filtered ("Type commands for when breakpoint %d is hit, one per line.\n\
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End with a line saying just \"end\".\n", bnum);
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l = read_command_lines ();
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free_command_lines (&b->commands);
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b->commands = l;
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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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extern int memory_breakpoint_size; /* from mem-break.c */
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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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if (memory_breakpoint_size < 0)
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/* No breakpoints on this machine. FIXME: This should be
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dependent on the debugging target. Probably want
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target_insert_breakpoint to return a size, saying how many
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bytes of the shadow contents are used, or perhaps have
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something like target_xfer_shadow. */
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return target_read_memory (memaddr, myaddr, len);
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ALL_BREAKPOINTS (b)
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{
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if (b->type == bp_watchpoint || !b->inserted)
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continue;
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else if (b->address + memory_breakpoint_size <= memaddr)
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/* The breakpoint is entirely before the chunk of memory
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we are reading. */
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continue;
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else if (b->address >= memaddr + len)
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/* The breakpoint is entirely after the chunk of memory we
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are reading. */
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continue;
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else
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{
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/* Copy the breakpoint from the shadow contents, and recurse
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for the things before and after. */
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/* Addresses and length of the part of the breakpoint that
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we need to copy. */
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CORE_ADDR membpt = b->address;
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unsigned int bptlen = memory_breakpoint_size;
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/* Offset within shadow_contents. */
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int bptoffset = 0;
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if (membpt < memaddr)
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{
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/* Only copy the second part of the breakpoint. */
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bptlen -= memaddr - membpt;
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bptoffset = memaddr - membpt;
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membpt = memaddr;
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}
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if (membpt + bptlen > memaddr + len)
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{
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/* Only copy the first part of the breakpoint. */
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bptlen -= (membpt + bptlen) - (memaddr + len);
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}
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memcpy (myaddr + membpt - memaddr,
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b->shadow_contents + bptoffset, bptlen);
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if (membpt > memaddr)
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{
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/* Copy the section of memory before the breakpoint. */
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status = read_memory_nobpt (memaddr, myaddr, membpt - memaddr);
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if (status != 0)
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return status;
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}
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if (membpt + bptlen < memaddr + len)
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{
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/* Copy the section of memory after the breakpoint. */
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status = read_memory_nobpt
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(membpt + bptlen,
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myaddr + membpt + bptlen - memaddr,
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memaddr + len - (membpt + bptlen));
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if (status != 0)
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return status;
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}
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return 0;
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}
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}
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/* Nothing overlaps. Just call read_memory_noerr. */
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return target_read_memory (memaddr, myaddr, len);
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}
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/* insert_breakpoints is used when starting or continuing the program.
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remove_breakpoints is used when the program stops.
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Both return zero if successful,
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or an `errno' value if could not write the inferior. */
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int
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insert_breakpoints ()
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{
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register struct breakpoint *b;
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int val = 0;
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int disabled_breaks = 0;
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ALL_BREAKPOINTS (b)
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if (b->type != bp_watchpoint
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&& b->enable != disabled
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&& ! b->inserted
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&& ! b->duplicate)
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{
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val = target_insert_breakpoint(b->address, b->shadow_contents);
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if (val)
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{
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/* Can't set the breakpoint. */
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#if defined (DISABLE_UNSETTABLE_BREAK)
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if (DISABLE_UNSETTABLE_BREAK (b->address))
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{
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val = 0;
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b->enable = disabled;
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if (!disabled_breaks)
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{
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fprintf (stderr,
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"Cannot insert breakpoint %d:\n", b->number);
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printf_filtered ("Disabling shared library breakpoints:\n");
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}
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disabled_breaks = 1;
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printf_filtered ("%d ", b->number);
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}
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else
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#endif
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{
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fprintf (stderr, "Cannot insert breakpoint %d:\n", b->number);
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#ifdef ONE_PROCESS_WRITETEXT
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fprintf (stderr,
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"The same program may be running in another process.\n");
|
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#endif
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memory_error (val, b->address); /* which bombs us out */
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}
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}
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else
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b->inserted = 1;
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}
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if (disabled_breaks)
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printf_filtered ("\n");
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return val;
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}
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||
|
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int
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remove_breakpoints ()
|
||
{
|
||
register struct breakpoint *b;
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int val;
|
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#ifdef BREAKPOINT_DEBUG
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printf ("Removing breakpoints.\n");
|
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#endif /* BREAKPOINT_DEBUG */
|
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ALL_BREAKPOINTS (b)
|
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if (b->type != bp_watchpoint && b->inserted)
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{
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val = target_remove_breakpoint(b->address, b->shadow_contents);
|
||
if (val)
|
||
return val;
|
||
b->inserted = 0;
|
||
#ifdef BREAKPOINT_DEBUG
|
||
printf ("Removed breakpoint at %s",
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local_hex_string(b->address));
|
||
printf (", shadow %s",
|
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local_hex_string(b->shadow_contents[0]));
|
||
printf (", %s.\n",
|
||
local_hex_string(b->shadow_contents[1]));
|
||
#endif /* BREAKPOINT_DEBUG */
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Clear the "inserted" flag in all breakpoints.
|
||
This is done when the inferior is loaded. */
|
||
|
||
void
|
||
mark_breakpoints_out ()
|
||
{
|
||
register struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
b->inserted = 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 != disabled && b->address == pc)
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* bpstat stuff. External routines' interfaces are documented
|
||
in breakpoint.h. */
|
||
|
||
/* 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;
|
||
|
||
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;
|
||
}
|
||
|
||
/* 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)
|
||
int 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;
|
||
|
||
executing_breakpoint_commands = 1;
|
||
old_chain = make_cleanup (cleanup_executing_breakpoints, 0);
|
||
|
||
top:
|
||
bs = *bsp;
|
||
|
||
breakpoint_proceeded = 0;
|
||
for (; bs != NULL; bs = bs->next)
|
||
{
|
||
while (bs->commands)
|
||
{
|
||
char *line = bs->commands->line;
|
||
bs->commands = bs->commands->next;
|
||
execute_command (line, 0);
|
||
/* If 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. */
|
||
if (breakpoint_proceeded)
|
||
goto top;
|
||
}
|
||
}
|
||
|
||
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. */
|
||
|
||
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_watchpoint))
|
||
return 0;
|
||
|
||
if (bs->breakpoint_at->type == bp_breakpoint)
|
||
{
|
||
/* I think the user probably only wants to see one breakpoint
|
||
number, not all of them. */
|
||
printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number);
|
||
return 0;
|
||
}
|
||
|
||
if (bs->old_val != NULL)
|
||
{
|
||
printf_filtered ("\nWatchpoint %d, ", bs->breakpoint_at->number);
|
||
print_expression (bs->breakpoint_at->exp, stdout);
|
||
printf_filtered ("\nOld value = ");
|
||
value_print (bs->old_val, stdout, 0, Val_pretty_default);
|
||
printf_filtered ("\nNew value = ");
|
||
value_print (bs->breakpoint_at->val, stdout, 0,
|
||
Val_pretty_default);
|
||
printf_filtered ("\n");
|
||
value_free (bs->old_val);
|
||
bs->old_val = NULL;
|
||
return 0;
|
||
}
|
||
/* We can't deal with it. Maybe another member of the bpstat chain can. */
|
||
return -1;
|
||
}
|
||
|
||
/* Print a message indicating what happened. Returns nonzero to
|
||
say that only the source line should be printed after this (zero
|
||
return means print the frame as well as the source line). */
|
||
/* Currently we always return zero. */
|
||
int
|
||
bpstat_print (bs)
|
||
bpstat bs;
|
||
{
|
||
int val;
|
||
|
||
if (bs == NULL)
|
||
return 0;
|
||
|
||
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 0;
|
||
}
|
||
|
||
/* 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;
|
||
{
|
||
return !value_true (evaluate_expression ((struct expression *)exp));
|
||
}
|
||
|
||
/* 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;
|
||
}
|
||
|
||
/* Return the frame which we can use to evaluate the expression
|
||
whose valid block is valid_block, or NULL if not in scope.
|
||
|
||
This whole concept is probably not the way to do things (it is incredibly
|
||
slow being the main reason, not to mention fragile (e.g. the sparc
|
||
frame pointer being fetched as 0 bug causes it to stop)). Instead,
|
||
introduce a version of "struct frame" which survives over calls to the
|
||
inferior, but which is better than FRAME_ADDR in the sense that it lets
|
||
us evaluate expressions relative to that frame (on some machines, it
|
||
can just be a FRAME_ADDR). Save one of those instead of (or in addition
|
||
to) the exp_valid_block, and then use it to evaluate the watchpoint
|
||
expression, with no need to do all this backtracing every time.
|
||
|
||
Or better yet, what if it just copied the struct frame and its next
|
||
frame? Off the top of my head, I would think that would work
|
||
because things like (a29k) rsize and msize, or (sparc) bottom just
|
||
depend on the frame, and aren't going to be different just because
|
||
the inferior has done something. Trying to recalculate them
|
||
strikes me as a lot of work, possibly even impossible. Saving the
|
||
next frame is needed at least on a29k, where get_saved_register
|
||
uses fi->next->saved_msp. For figuring out whether that frame is
|
||
still on the stack, I guess this needs to be machine-specific (e.g.
|
||
a29k) but I think
|
||
|
||
read_fp () INNER_THAN watchpoint_frame->frame
|
||
|
||
would generally work.
|
||
|
||
Of course the scope of the expression could be less than a whole
|
||
function; perhaps if the innermost frame is the one which the
|
||
watchpoint is relative to (another machine-specific thing, usually
|
||
|
||
FRAMELESS_FUNCTION_INVOCATION (get_current_frame(), fromleaf)
|
||
read_fp () == wp_frame->frame
|
||
&& !fromleaf
|
||
|
||
), *then* it could do a
|
||
|
||
contained_in (get_current_block (), wp->exp_valid_block).
|
||
|
||
*/
|
||
|
||
FRAME
|
||
within_scope (valid_block)
|
||
struct block *valid_block;
|
||
{
|
||
FRAME fr = get_current_frame ();
|
||
struct frame_info *fi = get_frame_info (fr);
|
||
CORE_ADDR func_start;
|
||
|
||
/* If caller_pc_valid is true, we are stepping through
|
||
a function prologue, which is bounded by callee_func_start
|
||
(inclusive) and callee_prologue_end (exclusive).
|
||
caller_pc is the pc of the caller.
|
||
|
||
Yes, this is hairy. */
|
||
static int caller_pc_valid = 0;
|
||
static CORE_ADDR caller_pc;
|
||
static CORE_ADDR callee_func_start;
|
||
static CORE_ADDR callee_prologue_end;
|
||
|
||
find_pc_partial_function (fi->pc, (PTR)NULL, &func_start, (CORE_ADDR *)NULL);
|
||
func_start += FUNCTION_START_OFFSET;
|
||
if (fi->pc == func_start)
|
||
{
|
||
/* We just called a function. The only other case I
|
||
can think of where the pc would equal the pc of the
|
||
start of a function is a frameless function (i.e.
|
||
no prologue) where we branch back to the start
|
||
of the function. In that case, SKIP_PROLOGUE won't
|
||
find one, and we'll clear caller_pc_valid a few lines
|
||
down. */
|
||
caller_pc_valid = 1;
|
||
caller_pc = SAVED_PC_AFTER_CALL (fr);
|
||
callee_func_start = func_start;
|
||
SKIP_PROLOGUE (func_start);
|
||
callee_prologue_end = func_start;
|
||
}
|
||
if (caller_pc_valid)
|
||
{
|
||
if (fi->pc < callee_func_start
|
||
|| fi->pc >= callee_prologue_end)
|
||
caller_pc_valid = 0;
|
||
}
|
||
|
||
if (contained_in (block_for_pc (caller_pc_valid
|
||
? caller_pc
|
||
: fi->pc),
|
||
valid_block))
|
||
{
|
||
return fr;
|
||
}
|
||
fr = get_prev_frame (fr);
|
||
|
||
/* If any active frame is in the exp_valid_block, then it's
|
||
OK. Note that this might not be the same invocation of
|
||
the exp_valid_block that we were watching a little while
|
||
ago, or the same one as when the watchpoint was set (e.g.
|
||
we are watching a local variable in a recursive function.
|
||
When we return from a recursive invocation, then we are
|
||
suddenly watching a different instance of the variable).
|
||
|
||
At least for now I am going to consider this a feature. */
|
||
for (; fr != NULL; fr = get_prev_frame (fr))
|
||
{
|
||
fi = get_frame_info (fr);
|
||
if (contained_in (block_for_pc (fi->pc),
|
||
valid_block))
|
||
{
|
||
return fr;
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/* Possible return values for watchpoint_check (this can't be an enum
|
||
because of check_errors). */
|
||
/* The watchpoint has been disabled. */
|
||
#define WP_DISABLED 1
|
||
/* The value has changed. */
|
||
#define WP_VALUE_CHANGED 2
|
||
/* The value has not changed. */
|
||
#define WP_VALUE_NOT_CHANGED 3
|
||
|
||
/* Check watchpoint condition. */
|
||
static int
|
||
watchpoint_check (p)
|
||
char *p;
|
||
{
|
||
bpstat bs = (bpstat) p;
|
||
FRAME fr;
|
||
|
||
int within_current_scope;
|
||
if (bs->breakpoint_at->exp_valid_block == NULL)
|
||
within_current_scope = 1;
|
||
else
|
||
{
|
||
fr = within_scope (bs->breakpoint_at->exp_valid_block);
|
||
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. */
|
||
/* But couldn't we just call free_all_values instead? */
|
||
|
||
value mark = value_mark ();
|
||
value new_val = evaluate_expression (bs->breakpoint_at->exp);
|
||
if (!value_equal (bs->breakpoint_at->val, new_val))
|
||
{
|
||
release_value (new_val);
|
||
value_free_to_mark (mark);
|
||
bs->old_val = bs->breakpoint_at->val;
|
||
bs->breakpoint_at->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). */
|
||
bs->breakpoint_at->enable = disabled;
|
||
printf_filtered ("\
|
||
Watchpoint %d disabled because the program has left the block in\n\
|
||
which its expression is valid.\n", bs->breakpoint_at->number);
|
||
return WP_DISABLED;
|
||
}
|
||
}
|
||
|
||
/* This is used when everything which needs to be printed has
|
||
already been printed. But we still want to print the frame. */
|
||
static int
|
||
print_it_done (bs)
|
||
bpstat bs;
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
/* This is used when nothing should be printed for this bpstat entry. */
|
||
|
||
static int
|
||
print_it_noop (bs)
|
||
bpstat bs;
|
||
{
|
||
return -1;
|
||
}
|
||
|
||
/* 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, and
|
||
the first element of the chain contains summary "stop" and
|
||
"print" flags for the whole chain.
|
||
|
||
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, frame_address)
|
||
CORE_ADDR *pc;
|
||
FRAME_ADDR frame_address;
|
||
{
|
||
register struct breakpoint *b;
|
||
CORE_ADDR bp_addr;
|
||
#if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
|
||
/* True if we've hit a breakpoint (as opposed to a watchpoint). */
|
||
int real_breakpoint = 0;
|
||
#endif
|
||
/* Root of the chain of bpstat's */
|
||
struct bpstat root_bs[1];
|
||
/* Pointer to the last thing in the chain currently. */
|
||
bpstat bs = root_bs;
|
||
|
||
/* Get the address where the breakpoint would have been. */
|
||
bp_addr = *pc - DECR_PC_AFTER_BREAK;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->enable == disabled)
|
||
continue;
|
||
|
||
if (b->type != bp_watchpoint && b->address != bp_addr)
|
||
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 */
|
||
|
||
bs->stop = 1;
|
||
bs->print = 1;
|
||
|
||
if (b->type == bp_watchpoint)
|
||
{
|
||
static char message1[] =
|
||
"Error evaluating expression for watchpoint %d\n";
|
||
char message[sizeof (message1) + 30 /* slop */];
|
||
sprintf (message, message1, b->number);
|
||
switch (catch_errors (watchpoint_check, (char *) bs, message,
|
||
RETURN_MASK_ALL))
|
||
{
|
||
case WP_DISABLED:
|
||
/* We've already printed what needs to be printed. */
|
||
bs->print_it = print_it_done;
|
||
/* Stop. */
|
||
break;
|
||
case WP_VALUE_CHANGED:
|
||
/* Stop. */
|
||
break;
|
||
case WP_VALUE_NOT_CHANGED:
|
||
/* Don't stop. */
|
||
bs->print_it = print_it_noop;
|
||
bs->stop = 0;
|
||
continue;
|
||
default:
|
||
/* Can't happen. */
|
||
/* FALLTHROUGH */
|
||
case 0:
|
||
/* Error from catch_errors. */
|
||
b->enable = disabled;
|
||
printf_filtered ("Watchpoint %d disabled.\n", b->number);
|
||
/* We've already printed what needs to be printed. */
|
||
bs->print_it = print_it_done;
|
||
/* Stop. */
|
||
break;
|
||
}
|
||
}
|
||
#if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
|
||
else
|
||
real_breakpoint = 1;
|
||
#endif
|
||
|
||
if (b->frame && b->frame != frame_address)
|
||
bs->stop = 0;
|
||
else
|
||
{
|
||
int value_is_zero;
|
||
|
||
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 (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;
|
||
}
|
||
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))
|
||
{
|
||
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 || defined (SHIFT_INST_REGS)
|
||
if (bs)
|
||
{
|
||
if (real_breakpoint)
|
||
{
|
||
*pc = bp_addr;
|
||
#if defined (SHIFT_INST_REGS)
|
||
{
|
||
CORE_ADDR pc = read_register (PC_REGNUM);
|
||
CORE_ADDR npc = read_register (NPC_REGNUM);
|
||
if (pc != npc)
|
||
{
|
||
write_register (NNPC_REGNUM, npc);
|
||
write_register (NPC_REGNUM, pc);
|
||
}
|
||
}
|
||
#else /* No SHIFT_INST_REGS. */
|
||
write_pc (bp_addr);
|
||
#endif /* No SHIFT_INST_REGS. */
|
||
}
|
||
}
|
||
#endif /* DECR_PC_AFTER_BREAK != 0. */
|
||
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,
|
||
|
||
/* 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 keep_c BPSTAT_WHAT_KEEP_CHECKING
|
||
#define stop_s BPSTAT_WHAT_STOP_SILENT
|
||
#define stop_n BPSTAT_WHAT_STOP_NOISY
|
||
#define single BPSTAT_WHAT_SINGLE
|
||
#define setlr BPSTAT_WHAT_SET_LONGJMP_RESUME
|
||
#define clrlr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
|
||
#define clrlrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
|
||
/* "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. */
|
||
static const enum bpstat_what_main_action
|
||
table[(int)class_last][(int)BPSTAT_WHAT_LAST] =
|
||
{
|
||
/* old action */
|
||
/* keep_c stop_s stop_n single setlr clrlr clrlrs */
|
||
|
||
/*no_effect*/ {keep_c, stop_s, stop_n, single, setlr , clrlr , clrlrs},
|
||
/*wp_silent*/ {stop_s, stop_s, stop_n, stop_s, stop_s, stop_s, stop_s},
|
||
/*wp_noisy*/ {stop_n, stop_n, stop_n, stop_n, stop_n, stop_n, stop_n},
|
||
/*bp_nostop*/ {single, stop_s, stop_n, single, setlr , clrlrs, clrlrs},
|
||
/*bp_silent*/ {stop_s, stop_s, stop_n, stop_s, stop_s, stop_s, stop_s},
|
||
/*bp_noisy*/ {stop_n, stop_n, stop_n, stop_n, stop_n, stop_n, stop_n},
|
||
/*long_jump*/ {setlr , stop_s, stop_n, setlr , err , err , err },
|
||
/*long_resume*/ {clrlr , stop_s, stop_n, clrlrs, err , err , err }
|
||
};
|
||
#undef keep_c
|
||
#undef stop_s
|
||
#undef stop_n
|
||
#undef single
|
||
#undef setlr
|
||
#undef clrlr
|
||
#undef clrlrs
|
||
#undef err
|
||
enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
|
||
int found_step_resume = 0;
|
||
|
||
for (; bs != NULL; bs = bs->next)
|
||
{
|
||
enum class bs_class;
|
||
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_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:
|
||
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 0
|
||
/* Need to temporarily disable this until we can fix the bug
|
||
with nexting over a breakpoint with ->stop clear causing
|
||
an infinite loop. For now, treat the breakpoint as having
|
||
been hit even if the frame is wrong. */
|
||
if (bs->stop)
|
||
{
|
||
#endif
|
||
found_step_resume = 1;
|
||
/* We don't handle this via the main_action. */
|
||
bs_class = no_effect;
|
||
#if 0
|
||
}
|
||
else
|
||
/* It is for the wrong frame. */
|
||
bs_class = bp_nostop;
|
||
#endif
|
||
break;
|
||
}
|
||
current_action = table[(int)bs_class][(int)current_action];
|
||
}
|
||
{
|
||
struct bpstat_what retval;
|
||
retval.main_action = current_action;
|
||
retval.step_resume = found_step_resume;
|
||
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;
|
||
}
|
||
|
||
/* Print information on breakpoint number BNUM, or -1 if all.
|
||
If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS
|
||
is nonzero, process only watchpoints. */
|
||
|
||
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 char *bptypes[] = {"breakpoint", "until", "finish", "watchpoint",
|
||
"longjmp", "longjmp resume"};
|
||
static char *bpdisps[] = {"del", "dis", "keep"};
|
||
static char bpenables[] = "ny";
|
||
char wrap_indent[80];
|
||
|
||
if (!breakpoint_chain)
|
||
{
|
||
printf_filtered ("No breakpoints or watchpoints.\n");
|
||
return;
|
||
}
|
||
|
||
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_watchpoint)
|
||
continue;
|
||
|
||
if (!found_a_breakpoint++)
|
||
printf_filtered ("Num Type Disp Enb %sWhat\n",
|
||
addressprint ? "Address " : "");
|
||
|
||
printf_filtered ("%-3d %-14s %-4s %-3c ",
|
||
b->number,
|
||
bptypes[(int)b->type],
|
||
bpdisps[(int)b->disposition],
|
||
bpenables[(int)b->enable]);
|
||
strcpy (wrap_indent, " ");
|
||
if (addressprint)
|
||
strcat (wrap_indent, " ");
|
||
switch (b->type)
|
||
{
|
||
case bp_watchpoint:
|
||
print_expression (b->exp, stdout);
|
||
break;
|
||
case bp_breakpoint:
|
||
case bp_until:
|
||
case bp_finish:
|
||
case bp_longjmp:
|
||
case bp_longjmp_resume:
|
||
if (addressprint)
|
||
printf_filtered ("%s ", local_hex_string_custom(b->address, "08"));
|
||
|
||
last_addr = b->address;
|
||
if (b->source_file)
|
||
{
|
||
sym = find_pc_function (b->address);
|
||
if (sym)
|
||
{
|
||
fputs_filtered ("in ", stdout);
|
||
fputs_filtered (SYMBOL_SOURCE_NAME (sym), stdout);
|
||
wrap_here (wrap_indent);
|
||
fputs_filtered (" at ", stdout);
|
||
}
|
||
fputs_filtered (b->source_file, stdout);
|
||
printf_filtered (":%d", b->line_number);
|
||
}
|
||
else
|
||
print_address_symbolic (b->address, stdout, demangle, " ");
|
||
}
|
||
|
||
printf_filtered ("\n");
|
||
|
||
if (b->frame)
|
||
printf_filtered ("\tstop only in stack frame at %s\n",
|
||
local_hex_string(b->frame));
|
||
if (b->cond)
|
||
{
|
||
printf_filtered ("\tstop only if ");
|
||
print_expression (b->cond, stdout);
|
||
printf_filtered ("\n");
|
||
}
|
||
if (b->ignore_count)
|
||
printf_filtered ("\tignore next %d hits\n", b->ignore_count);
|
||
if ((l = b->commands))
|
||
while (l)
|
||
{
|
||
fputs_filtered ("\t", stdout);
|
||
fputs_filtered (l->line, stdout);
|
||
fputs_filtered ("\n", stdout);
|
||
l = l->next;
|
||
}
|
||
}
|
||
|
||
if (!found_a_breakpoint
|
||
&& bnum != -1)
|
||
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);
|
||
}
|
||
|
||
/* 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 */
|
||
static 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)
|
||
register CORE_ADDR pc;
|
||
{
|
||
register int others = 0;
|
||
register struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->address == pc)
|
||
others++;
|
||
if (others > 0)
|
||
{
|
||
printf ("Note: breakpoint%s ", (others > 1) ? "s" : "");
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->address == pc)
|
||
{
|
||
others--;
|
||
printf ("%d%s%s ",
|
||
b->number,
|
||
(b->enable == disabled) ? " (disabled)" : "",
|
||
(others > 1) ? "," : ((others == 1) ? " and" : ""));
|
||
}
|
||
printf ("also set at pc %s.\n", local_hex_string(pc));
|
||
}
|
||
}
|
||
|
||
/* 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)
|
||
CORE_ADDR address;
|
||
{
|
||
register struct breakpoint *b;
|
||
register int count = 0;
|
||
|
||
if (address == 0) /* Watchpoints are uninteresting */
|
||
return;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->enable != disabled && b->address == address)
|
||
{
|
||
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! */
|
||
|
||
static 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->line_number = sal.line;
|
||
b->enable = enabled;
|
||
b->next = 0;
|
||
b->silent = 0;
|
||
b->ignore_count = 0;
|
||
b->commands = NULL;
|
||
b->frame = 0;
|
||
|
||
/* 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);
|
||
|
||
return b;
|
||
}
|
||
|
||
static void
|
||
create_longjmp_breakpoint(func_name)
|
||
char *func_name;
|
||
{
|
||
struct symtab_and_line sal;
|
||
struct breakpoint *b;
|
||
static int internal_breakpoint_number = -1;
|
||
|
||
if (func_name != NULL)
|
||
{
|
||
struct minimal_symbol *m;
|
||
|
||
m = lookup_minimal_symbol(func_name, (struct objfile *)NULL);
|
||
if (m)
|
||
sal.pc = SYMBOL_VALUE_ADDRESS (m);
|
||
else
|
||
return;
|
||
}
|
||
else
|
||
sal.pc = 0;
|
||
|
||
sal.symtab = NULL;
|
||
sal.line = 0;
|
||
|
||
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--;
|
||
}
|
||
|
||
/* 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);
|
||
}
|
||
}
|
||
|
||
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);
|
||
}
|
||
}
|
||
|
||
/* 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;
|
||
FRAME 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_FP(frame);
|
||
else
|
||
b->frame = 0;
|
||
check_duplicates (b->address);
|
||
return;
|
||
}
|
||
}
|
||
|
||
/* 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;
|
||
FRAME 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_FP (frame) : 0);
|
||
return b;
|
||
}
|
||
|
||
#if 0
|
||
void
|
||
clear_momentary_breakpoints ()
|
||
{
|
||
register struct breakpoint *b;
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->disposition == delete)
|
||
{
|
||
delete_breakpoint (b);
|
||
break;
|
||
}
|
||
}
|
||
#endif
|
||
|
||
/* Tell the user we have just set a breakpoint B. */
|
||
static void
|
||
mention (b)
|
||
struct breakpoint *b;
|
||
{
|
||
switch (b->type)
|
||
{
|
||
case bp_watchpoint:
|
||
printf_filtered ("Watchpoint %d: ", b->number);
|
||
print_expression (b->exp, stdout);
|
||
break;
|
||
case bp_breakpoint:
|
||
printf_filtered ("Breakpoint %d at %s", b->number,
|
||
local_hex_string(b->address));
|
||
if (b->source_file)
|
||
printf_filtered (": file %s, line %d.",
|
||
b->source_file, b->line_number);
|
||
break;
|
||
case bp_until:
|
||
case bp_finish:
|
||
case bp_longjmp:
|
||
case bp_longjmp_resume:
|
||
break;
|
||
}
|
||
printf_filtered ("\n");
|
||
}
|
||
|
||
#if 0
|
||
/* Nobody calls this currently. */
|
||
/* Set a breakpoint from a symtab and line.
|
||
If TEMPFLAG is nonzero, it is a temporary breakpoint.
|
||
ADDR_STRING is a malloc'd string holding the name of where we are
|
||
setting the breakpoint. This is used later to re-set it after the
|
||
program is relinked and symbols are reloaded.
|
||
Print the same confirmation messages that the breakpoint command prints. */
|
||
|
||
void
|
||
set_breakpoint (s, line, tempflag, addr_string)
|
||
struct symtab *s;
|
||
int line;
|
||
int tempflag;
|
||
char *addr_string;
|
||
{
|
||
register struct breakpoint *b;
|
||
struct symtab_and_line sal;
|
||
|
||
sal.symtab = s;
|
||
sal.line = line;
|
||
sal.pc = 0;
|
||
resolve_sal_pc (&sal); /* Might error out */
|
||
describe_other_breakpoints (sal.pc);
|
||
|
||
b = set_raw_breakpoint (sal);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->type = bp_breakpoint;
|
||
b->cond = 0;
|
||
b->addr_string = addr_string;
|
||
b->enable = enabled;
|
||
b->disposition = tempflag ? delete : donttouch;
|
||
|
||
mention (b);
|
||
}
|
||
#endif /* 0 */
|
||
|
||
/* Set a breakpoint according to ARG (function, linenum or *address)
|
||
and make it temporary if TEMPFLAG is nonzero. */
|
||
|
||
static void
|
||
break_command_1 (arg, tempflag, from_tty)
|
||
char *arg;
|
||
int tempflag, from_tty;
|
||
{
|
||
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;
|
||
/* Pointers in arg to the start, and one past the end,
|
||
of the address part. */
|
||
char *addr_start = NULL;
|
||
char *addr_end;
|
||
struct cleanup *old_chain;
|
||
struct cleanup *canonical_strings_chain;
|
||
char **canonical = (char **)NULL;
|
||
|
||
int i;
|
||
|
||
sals.sals = NULL;
|
||
sals.nelts = 0;
|
||
|
||
sal.line = sal.pc = sal.end = 0;
|
||
sal.symtab = 0;
|
||
|
||
/* 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;
|
||
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]);
|
||
}
|
||
}
|
||
|
||
/* 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++)
|
||
{
|
||
resolve_sal_pc (&sals.sals[i]);
|
||
|
||
while (arg && *arg)
|
||
{
|
||
if (arg[0] == 'i' && arg[1] == 'f'
|
||
&& (arg[2] == ' ' || arg[2] == '\t'))
|
||
{
|
||
arg += 2;
|
||
cond_start = arg;
|
||
cond = parse_exp_1 (&arg, block_for_pc (sals.sals[i].pc), 0);
|
||
cond_end = arg;
|
||
}
|
||
else
|
||
error ("Junk at end of arguments.");
|
||
}
|
||
}
|
||
|
||
/* 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);
|
||
|
||
b = set_raw_breakpoint (sal);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->type = bp_breakpoint;
|
||
b->cond = cond;
|
||
|
||
/* 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 ? delete : donttouch;
|
||
|
||
mention (b);
|
||
}
|
||
|
||
if (sals.nelts > 1)
|
||
{
|
||
printf ("Multiple breakpoints were set.\n");
|
||
printf ("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 != 0)
|
||
{
|
||
pc = find_line_pc (sal->symtab, sal->line);
|
||
if (pc == 0)
|
||
error ("No line %d in file \"%s\".",
|
||
sal->line, sal->symtab->filename);
|
||
sal->pc = pc;
|
||
}
|
||
}
|
||
|
||
void
|
||
break_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
break_command_1 (arg, 0, from_tty);
|
||
}
|
||
|
||
static void
|
||
tbreak_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
break_command_1 (arg, 1, from_tty);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
watch_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
struct breakpoint *b;
|
||
struct symtab_and_line sal;
|
||
struct expression *exp;
|
||
struct block *exp_valid_block;
|
||
struct value *val;
|
||
|
||
sal.pc = 0;
|
||
sal.symtab = NULL;
|
||
sal.line = 0;
|
||
|
||
/* Parse arguments. */
|
||
innermost_block = NULL;
|
||
exp = parse_expression (arg);
|
||
exp_valid_block = innermost_block;
|
||
val = evaluate_expression (exp);
|
||
release_value (val);
|
||
if (VALUE_LAZY (val))
|
||
value_fetch_lazy (val);
|
||
|
||
/* Now set up the breakpoint. */
|
||
b = set_raw_breakpoint (sal);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->type = bp_watchpoint;
|
||
b->disposition = donttouch;
|
||
b->exp = exp;
|
||
b->exp_valid_block = exp_valid_block;
|
||
b->val = val;
|
||
b->cond = 0;
|
||
b->cond_string = NULL;
|
||
b->exp_string = savestring (arg, strlen (arg));
|
||
mention (b);
|
||
}
|
||
|
||
/*
|
||
* 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;
|
||
FRAME 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(delete_breakpoint, breakpoint);
|
||
|
||
/* Keep within the current frame */
|
||
|
||
if (prev_frame)
|
||
{
|
||
struct frame_info *fi;
|
||
|
||
fi = get_frame_info (prev_frame);
|
||
sal = find_pc_line (fi->pc, 0);
|
||
sal.pc = fi->pc;
|
||
breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until);
|
||
make_cleanup(delete_breakpoint, breakpoint);
|
||
}
|
||
|
||
proceed (-1, -1, 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;
|
||
};
|
||
|
||
#if 0
|
||
/* 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 ("No catch clause for exception %s.\n", p);
|
||
#if 0
|
||
win:
|
||
#endif
|
||
p = p1;
|
||
while (*p == ' ' || *p == '\t') p++;
|
||
}
|
||
}
|
||
#endif /* 0 */
|
||
|
||
/* 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;
|
||
struct frame_info *fi;
|
||
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);
|
||
fi = get_frame_info (selected_frame);
|
||
pc = fi->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;
|
||
}
|
||
|
||
/* Commands to deal with catching exceptions. */
|
||
|
||
static void
|
||
catch_command_1 (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;
|
||
|
||
sal.line = sal.pc = sal.end = 0;
|
||
sal.symtab = 0;
|
||
|
||
/* 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
|
||
/* 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);
|
||
|
||
b = set_raw_breakpoint (sal);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->type = bp_breakpoint;
|
||
b->cond = cond;
|
||
b->enable = enabled;
|
||
b->disposition = tempflag ? delete : donttouch;
|
||
|
||
mention (b);
|
||
}
|
||
|
||
if (sals.nelts > 1)
|
||
{
|
||
printf ("Multiple breakpoints were set.\n");
|
||
printf ("Use the \"delete\" command to delete unwanted breakpoints.\n");
|
||
}
|
||
free ((PTR)sals.sals);
|
||
}
|
||
|
||
#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
|
||
clear_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
register struct breakpoint *b, *b1;
|
||
struct symtabs_and_lines sals;
|
||
struct symtab_and_line sal;
|
||
register struct breakpoint *found;
|
||
int i;
|
||
|
||
if (arg)
|
||
{
|
||
sals = decode_line_spec (arg, 1);
|
||
}
|
||
else
|
||
{
|
||
sals.sals = (struct symtab_and_line *) xmalloc (sizeof (struct symtab_and_line));
|
||
sal.line = default_breakpoint_line;
|
||
sal.symtab = default_breakpoint_symtab;
|
||
sal.pc = 0;
|
||
if (sal.symtab == 0)
|
||
error ("No source file specified.");
|
||
|
||
sals.sals[0] = sal;
|
||
sals.nelts = 1;
|
||
}
|
||
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
/* If exact pc given, clear bpts at that pc.
|
||
But if sal.pc is zero, clear all bpts on specified line. */
|
||
sal = sals.sals[i];
|
||
found = (struct breakpoint *) 0;
|
||
while (breakpoint_chain
|
||
&& (sal.pc
|
||
? breakpoint_chain->address == 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_watchpoint
|
||
&& (sal.pc
|
||
? b->next->address == 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 ("Deleted breakpoint%s ", found->next ? "s" : "");
|
||
while (found)
|
||
{
|
||
if (from_tty) printf ("%d ", found->number);
|
||
b1 = found->next;
|
||
delete_breakpoint (found);
|
||
found = b1;
|
||
}
|
||
if (from_tty) putchar ('\n');
|
||
}
|
||
free ((PTR)sals.sals);
|
||
}
|
||
|
||
/* Delete breakpoint in BS if they are `delete' breakpoints.
|
||
This is called after any breakpoint is hit, or after errors. */
|
||
|
||
void
|
||
breakpoint_auto_delete (bs)
|
||
bpstat bs;
|
||
{
|
||
for (; bs; bs = bs->next)
|
||
if (bs->breakpoint_at && bs->breakpoint_at->disposition == delete)
|
||
delete_breakpoint (bs->breakpoint_at);
|
||
}
|
||
|
||
/* 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->inserted)
|
||
target_remove_breakpoint(bpt->address, bpt->shadow_contents);
|
||
|
||
if (breakpoint_chain == bpt)
|
||
breakpoint_chain = bpt->next;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->next == bpt)
|
||
{
|
||
b->next = bpt->next;
|
||
break;
|
||
}
|
||
|
||
check_duplicates (bpt->address);
|
||
/* If this breakpoint was inserted, and there is another breakpoint
|
||
at the same address, we need to insert the other breakpoint. */
|
||
if (bpt->inserted)
|
||
{
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->address == bpt->address && !b->duplicate)
|
||
{
|
||
int val;
|
||
val = target_insert_breakpoint (b->address, b->shadow_contents);
|
||
if (val != 0)
|
||
{
|
||
fprintf (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_string != NULL)
|
||
free (bpt->exp_string);
|
||
if (bpt->source_file != NULL)
|
||
free (bpt->source_file);
|
||
|
||
if (xgdb_verbose && bpt->type == bp_breakpoint)
|
||
printf ("breakpoint #%d deleted\n", bpt->number);
|
||
|
||
/* 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;
|
||
free ((PTR)bpt);
|
||
}
|
||
|
||
static void
|
||
delete_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
|
||
if (arg == 0)
|
||
{
|
||
/* Ask user only if there are some breakpoints to delete. */
|
||
if (!from_tty
|
||
|| (breakpoint_chain && query ("Delete all breakpoints? ", 0, 0)))
|
||
{
|
||
/* No arg; clear all breakpoints. */
|
||
while (breakpoint_chain)
|
||
delete_breakpoint (breakpoint_chain);
|
||
}
|
||
}
|
||
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 */
|
||
int i;
|
||
struct symtabs_and_lines sals;
|
||
char *s;
|
||
enum enable save_enable;
|
||
|
||
switch (b->type)
|
||
{
|
||
case bp_breakpoint:
|
||
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;
|
||
|
||
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]);
|
||
if (b->address != sals.sals[i].pc
|
||
|| (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)
|
||
))
|
||
{
|
||
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;
|
||
|
||
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);
|
||
}
|
||
|
||
check_duplicates (b->address);
|
||
|
||
mention (b);
|
||
}
|
||
b->enable = save_enable; /* Restore it, this worked. */
|
||
}
|
||
free ((PTR)sals.sals);
|
||
break;
|
||
|
||
case bp_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. */
|
||
b->exp = parse_expression (b->exp_string);
|
||
b->exp_valid_block = innermost_block;
|
||
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;
|
||
b->cond = parse_exp_1 (&s, (struct block *)0, 0);
|
||
}
|
||
if (b->enable == enabled)
|
||
mention (b);
|
||
break;
|
||
|
||
default:
|
||
printf_filtered ("Deleting unknown breakpoint type %d\n", b->type);
|
||
/* fall through */
|
||
case bp_until:
|
||
case bp_finish:
|
||
case bp_longjmp:
|
||
case bp_longjmp_resume:
|
||
delete_breakpoint (b);
|
||
break;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Re-set all breakpoints after symbols have been re-loaded. */
|
||
void
|
||
breakpoint_re_set ()
|
||
{
|
||
struct breakpoint *b, *temp;
|
||
static char message1[] = "Error in re-setting breakpoint %d:\n";
|
||
char message[sizeof (message1) + 30 /* slop */];
|
||
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
{
|
||
sprintf (message, message1, b->number); /* Format possible error msg */
|
||
catch_errors (breakpoint_re_set_one, (char *) b, message,
|
||
RETURN_MASK_ALL);
|
||
}
|
||
|
||
create_longjmp_breakpoint("longjmp");
|
||
create_longjmp_breakpoint("_longjmp");
|
||
create_longjmp_breakpoint("siglongjmp");
|
||
create_longjmp_breakpoint(NULL);
|
||
|
||
#if 0
|
||
/* Took this out (temporaliy 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). */
|
||
|
||
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);
|
||
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");
|
||
}
|
||
|
||
/* 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)
|
||
{
|
||
function (b);
|
||
goto win;
|
||
}
|
||
printf ("No breakpoint number %d.\n", num);
|
||
win:
|
||
p = p1;
|
||
}
|
||
}
|
||
|
||
static void
|
||
enable_breakpoint (bpt)
|
||
struct breakpoint *bpt;
|
||
{
|
||
FRAME save_selected_frame;
|
||
int save_selected_frame_level = -1;
|
||
|
||
bpt->enable = enabled;
|
||
|
||
if (xgdb_verbose && bpt->type == bp_breakpoint)
|
||
printf ("breakpoint #%d enabled\n", bpt->number);
|
||
|
||
check_duplicates (bpt->address);
|
||
if (bpt->type == bp_watchpoint)
|
||
{
|
||
if (bpt->exp_valid_block != NULL)
|
||
{
|
||
FRAME fr = within_scope (bpt->exp_valid_block);
|
||
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);
|
||
|
||
bpt->val = evaluate_expression (bpt->exp);
|
||
release_value (bpt->val);
|
||
if (VALUE_LAZY (bpt->val))
|
||
value_fetch_lazy (bpt->val);
|
||
|
||
if (save_selected_frame_level >= 0)
|
||
select_frame (save_selected_frame, save_selected_frame_level);
|
||
}
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
enable_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
struct breakpoint *bpt;
|
||
if (args == 0)
|
||
ALL_BREAKPOINTS (bpt)
|
||
switch (bpt->type)
|
||
{
|
||
case bp_breakpoint:
|
||
case bp_watchpoint:
|
||
enable_breakpoint (bpt);
|
||
default:
|
||
continue;
|
||
}
|
||
else
|
||
map_breakpoint_numbers (args, enable_breakpoint);
|
||
}
|
||
|
||
static void
|
||
disable_breakpoint (bpt)
|
||
struct breakpoint *bpt;
|
||
{
|
||
bpt->enable = disabled;
|
||
|
||
if (xgdb_verbose && bpt->type == bp_breakpoint)
|
||
printf_filtered ("breakpoint #%d disabled\n", bpt->number);
|
||
|
||
check_duplicates (bpt->address);
|
||
}
|
||
|
||
/* 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_breakpoint:
|
||
case bp_watchpoint:
|
||
disable_breakpoint (bpt);
|
||
default:
|
||
continue;
|
||
}
|
||
else
|
||
map_breakpoint_numbers (args, disable_breakpoint);
|
||
}
|
||
|
||
static void
|
||
enable_once_breakpoint (bpt)
|
||
struct breakpoint *bpt;
|
||
{
|
||
bpt->enable = enabled;
|
||
bpt->disposition = disable;
|
||
|
||
check_duplicates (bpt->address);
|
||
}
|
||
|
||
/* 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;
|
||
{
|
||
bpt->enable = enabled;
|
||
bpt->disposition = delete;
|
||
|
||
check_duplicates (bpt->address);
|
||
}
|
||
|
||
/* 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 ()
|
||
{
|
||
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.");
|
||
|
||
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\
|
||
N is an integer; COND is an expression to be evaluated whenever\n\
|
||
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 enabled temporarily,\n\
|
||
so it will be disabled when hit. Equivalent to \"break\" followed\n\
|
||
by using \"enable once\" on the breakpoint number.");
|
||
|
||
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);
|
||
|
||
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.\n\
|
||
See the \"tbreak\" command which sets a breakpoint and enables it once.",
|
||
&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.\n\
|
||
See the \"tbreak\" command which sets a breakpoint and enables it once.",
|
||
&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);
|
||
|
||
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);
|
||
|
||
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,
|
||
"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.");
|
||
|
||
add_com ("break", class_breakpoint, break_command,
|
||
"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.");
|
||
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_info ("breakpoints", breakpoints_info,
|
||
"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 \"$bpnum\" contains the number of the last\n\
|
||
breakpoint set.");
|
||
|
||
#if MAINTENANCE_CMDS
|
||
|
||
add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints,
|
||
"Status of all breakpoints, or breakpoint number NUMBER.\n\
|
||
The \"Type\" column indicates one of:\n\
|
||
\tbreakpoint - normal breakpoint\n\
|
||
\twatchpoint - watchpoint\n\
|
||
\tlongjmp - internal breakpoint used to step through longjmp()\n\
|
||
\tlongjmp resume - internal breakpoint at the target of longjmp()\n\
|
||
\tuntil - internal breakpoint used by the \"until\" command\n\
|
||
\tfinish - internal breakpoint used by the \"finish\" command\n\
|
||
The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
|
||
the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
|
||
breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
|
||
address and file/line number respectively.\n\n\
|
||
Convenience variable \"$_\" 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.",
|
||
&maintenanceinfolist);
|
||
|
||
#endif /* MAINTENANCE_CMDS */
|
||
|
||
add_com ("catch", class_breakpoint, catch_command,
|
||
"Set breakpoints to catch exceptions that are raised.\n\
|
||
Argument may be a single exception to catch, multiple exceptions\n\
|
||
to catch, or the default exception \"default\". If no arguments\n\
|
||
are given, breakpoints are set at all exception handlers catch clauses\n\
|
||
within the current scope.\n\
|
||
\n\
|
||
A condition specified for the catch applies to all breakpoints set\n\
|
||
with this command\n\
|
||
\n\
|
||
Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
|
||
|
||
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_info ("watchpoints", breakpoints_info,
|
||
"Synonym for ``info breakpoints''.");
|
||
}
|
||
|
||
/* OK, when we call objfile_relocate, we need to relocate breakpoints
|
||
too. breakpoint_re_set is not a good choice--for example, if
|
||
addr_string contains just a line number without a file name the
|
||
breakpoint might get set in a different file. In general, there is
|
||
no need to go all the way back to the user's string (though this might
|
||
work if some effort were made to canonicalize it), since symtabs and
|
||
everything except addresses are still valid.
|
||
|
||
Probably the best way to solve this is to have each breakpoint save
|
||
the objfile and the section number that was used to set it (if set
|
||
by "*addr", probably it is best to use find_pc_line to get a symtab
|
||
and use the objfile and block_line_section for that symtab). Then
|
||
objfile_relocate can call fixup_breakpoints with the objfile and
|
||
the new_offsets, and it can relocate only the appropriate breakpoints. */
|
||
|
||
#ifdef IBM6000_TARGET
|
||
/* But for now, just kludge it based on the concept that before an
|
||
objfile is relocated the breakpoint is below 0x10000000, and afterwards
|
||
it is higher, so that way we only relocate each breakpoint once. */
|
||
|
||
void
|
||
fixup_breakpoints (low, high, delta)
|
||
CORE_ADDR low;
|
||
CORE_ADDR high;
|
||
CORE_ADDR delta;
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->address >= low && b->address <= high)
|
||
b->address += delta;
|
||
}
|
||
}
|
||
#endif
|