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2388 lines
60 KiB
C
2388 lines
60 KiB
C
/* Everything about breakpoints, for GDB.
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Copyright (C) 1986, 1987, 1989, 1990 Free Software Foundation, Inc.
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This file is part of GDB.
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GDB 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 1, or (at your option)
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any later version.
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GDB 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 GDB; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdio.h>
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#include <ctype.h>
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#include "defs.h"
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#include "param.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 "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 <string.h>
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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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extern int catch_errors ();
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extern void set_next_address (); /* ...for x/ command */
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/* Are we executing breakpoint commands? */
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static int executing_breakpoint_commands;
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/* States of enablement of breakpoint.
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`temporary' means disable when hit.
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`delete' means delete when hit. */
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enum enable { disabled, enabled, temporary, delete};
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/* Not that the ->silent field is not currently used by any commands
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(though the code is in there if it was to be, and set_raw_breakpoint
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does set it to 0). I implemented it because I thought it would be
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useful for a hack I had to put in; I'm going to leave it in because
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I can see how there might be times when it would indeed be useful */
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/* This is for a breakpoint or a watchpoint. */
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struct breakpoint
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{
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struct breakpoint *next;
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/* Number assigned to distinguish breakpoints. */
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int number;
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/* Address to break at, or NULL if not a breakpoint. */
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CORE_ADDR address;
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/* Line number of this address. Redundant. Only matters if address
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is non-NULL. */
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int line_number;
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/* Symtab of file of this address. Redundant. Only matters if address
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is non-NULL. */
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struct symtab *symtab;
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/* Zero means disabled; remember the info but don't break here. */
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enum enable enable;
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/* Non-zero means a silent breakpoint (don't print frame info
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if we stop here). */
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unsigned char silent;
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/* Number of stops at this breakpoint that should
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be continued automatically before really stopping. */
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int ignore_count;
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/* "Real" contents of byte where breakpoint has been inserted.
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Valid only when breakpoints are in the program. Under the complete
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control of the target insert_breakpoint and remove_breakpoint routines.
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No other code should assume anything about the value(s) here. */
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char shadow_contents[BREAKPOINT_MAX];
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/* Nonzero if this breakpoint is now inserted. Only matters if address
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is non-NULL. */
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char inserted;
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/* Nonzero if this is not the first breakpoint in the list
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for the given address. Only matters if address is non-NULL. */
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char duplicate;
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/* Chain of command lines to execute when this breakpoint is hit. */
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struct command_line *commands;
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/* Stack depth (address of frame). If nonzero, break only if fp
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equals this. */
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FRAME_ADDR frame;
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/* Conditional. Break only if this expression's value is nonzero. */
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struct expression *cond;
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/* String we used to set the breakpoint (malloc'd). Only matters if
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address is non-NULL. */
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char *addr_string;
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/* String form of the breakpoint condition (malloc'd), or NULL if there
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is no condition. */
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char *cond_string;
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/* The expression we are watching, or NULL if not a watchpoint. */
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struct expression *exp;
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/* The largest block within which it is valid, or NULL if it is
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valid anywhere (e.g. consists just of global symbols). */
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struct block *exp_valid_block;
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/* Value of the watchpoint the last time we checked it. */
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value val;
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};
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#define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next)
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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_long (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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static void delete_breakpoint ();
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void breakpoint_auto_delete ();
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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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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 (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 (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 ("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_c_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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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 (input_from_terminal_p ())
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{
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printf ("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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fflush (stdout);
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}
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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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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. */
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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->address == NULL || !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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bcopy (b->shadow_contents + bptoffset,
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myaddr + membpt - memaddr, 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->address != NULL
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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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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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int
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remove_breakpoints ()
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{
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||
register struct breakpoint *b;
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int val;
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||
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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->address != NULL && b->inserted)
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{
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val = target_remove_breakpoint(b->address, b->shadow_contents);
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if (val)
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return val;
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b->inserted = 0;
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#ifdef BREAKPOINT_DEBUG
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printf ("Removed breakpoint at 0x%x, shadow 0x%x, 0x%x.\n",
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b->address, b->shadow_contents[0], b->shadow_contents[1]);
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||
#endif /* BREAKPOINT_DEBUG */
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||
}
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||
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||
return 0;
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||
}
|
||
|
||
/* Clear the "inserted" flag in all breakpoints.
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||
This is done when the inferior is loaded. */
|
||
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||
void
|
||
mark_breakpoints_out ()
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||
{
|
||
register struct breakpoint *b;
|
||
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||
ALL_BREAKPOINTS (b)
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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)
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||
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. */
|
||
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 (p);
|
||
p = q;
|
||
}
|
||
*bsp = NULL;
|
||
}
|
||
|
||
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));
|
||
bcopy (bs, tmp, 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;
|
||
}
|
||
|
||
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 */
|
||
}
|
||
}
|
||
|
||
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;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* 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;
|
||
|
||
top:
|
||
bs = *bsp;
|
||
|
||
executing_breakpoint_commands = 1;
|
||
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;
|
||
}
|
||
}
|
||
clear_momentary_breakpoints ();
|
||
|
||
executing_breakpoint_commands = 0;
|
||
}
|
||
|
||
int
|
||
bpstat_print (bs)
|
||
bpstat bs;
|
||
{
|
||
/* bs->breakpoint_at can be NULL if it was a momentary breakpoint
|
||
which has since been deleted. */
|
||
if (bs == NULL || bs->breakpoint_at == NULL)
|
||
return 0;
|
||
|
||
/* If bpstat_stop_status says don't print, OK, we won't. An example
|
||
circumstance is when we single-stepped for both a watchpoint and
|
||
for a "stepi" instruction. The bpstat says that the watchpoint
|
||
explains the stop, but we shouldn't print because the watchpoint's
|
||
value didn't change -- and the real reason we are stopping here
|
||
rather than continuing to step (as the watchpoint would've had us do)
|
||
is because of the "stepi". */
|
||
if (!bs->print)
|
||
return 0;
|
||
|
||
if (bs->breakpoint_at->address != NULL)
|
||
{
|
||
/* 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 1;
|
||
}
|
||
|
||
/* 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);
|
||
|
||
fprintf_filtered (stderr, "gdb internal error: in bpstat_print\n");
|
||
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 int to
|
||
make it pass through catch_errors. */
|
||
|
||
static int
|
||
breakpoint_cond_eval (exp)
|
||
int exp;
|
||
{
|
||
return value_zerop (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->momentary = b->number == -3;
|
||
bs->old_val = NULL;
|
||
return bs;
|
||
}
|
||
|
||
/* 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.)
|
||
|
||
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;
|
||
int stop = 0;
|
||
int print = 0;
|
||
CORE_ADDR bp_addr;
|
||
/* True if we've hit a breakpoint (as opposed to a watchpoint). */
|
||
int real_breakpoint = 0;
|
||
/* Root of the chain of bpstat's */
|
||
struct bpstat__struct 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)
|
||
{
|
||
int this_bp_stop;
|
||
int this_bp_print;
|
||
|
||
if (b->enable == disabled)
|
||
continue;
|
||
if (b->address != NULL && b->address != bp_addr)
|
||
continue;
|
||
|
||
bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */
|
||
|
||
this_bp_stop = 1;
|
||
this_bp_print = 1;
|
||
|
||
if (b->exp != NULL) /* Watchpoint */
|
||
{
|
||
int within_current_scope;
|
||
if (b->exp_valid_block != NULL)
|
||
within_current_scope =
|
||
contained_in (get_selected_block (), b->exp_valid_block);
|
||
else
|
||
within_current_scope = 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. */
|
||
|
||
value mark = value_mark ();
|
||
value new_val = evaluate_expression (b->exp);
|
||
if (!value_equal (b->val, new_val))
|
||
{
|
||
release_value (new_val);
|
||
value_free_to_mark (mark);
|
||
bs->old_val = b->val;
|
||
b->val = new_val;
|
||
/* We will stop here */
|
||
}
|
||
else
|
||
{
|
||
/* Nothing changed, don't do anything. */
|
||
value_free_to_mark (mark);
|
||
continue;
|
||
/* We won't stop here */
|
||
}
|
||
}
|
||
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). */
|
||
b->enable = disabled;
|
||
printf_filtered ("\
|
||
Watchpoint %d disabled because the program has left the block in\n\
|
||
which its expression is valid.\n", b->number);
|
||
/* We won't stop here */
|
||
/* FIXME, maybe we should stop here!!! */
|
||
continue;
|
||
}
|
||
}
|
||
else
|
||
real_breakpoint = 1;
|
||
|
||
if (b->frame && b->frame != frame_address)
|
||
this_bp_stop = 0;
|
||
else
|
||
{
|
||
int value_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_zero
|
||
= catch_errors (breakpoint_cond_eval, (int)(b->cond),
|
||
"Error occurred in testing breakpoint condition.");
|
||
free_all_values ();
|
||
}
|
||
if (b->cond && value_zero)
|
||
{
|
||
this_bp_stop = 0;
|
||
}
|
||
else if (b->ignore_count > 0)
|
||
{
|
||
b->ignore_count--;
|
||
this_bp_stop = 0;
|
||
}
|
||
else
|
||
{
|
||
/* We will stop here */
|
||
if (b->enable == temporary)
|
||
b->enable = disabled;
|
||
bs->commands = b->commands;
|
||
if (b->silent)
|
||
this_bp_print = 0;
|
||
if (bs->commands && !strcmp ("silent", bs->commands->line))
|
||
{
|
||
bs->commands = bs->commands->next;
|
||
this_bp_print = 0;
|
||
}
|
||
}
|
||
}
|
||
if (this_bp_stop)
|
||
stop = 1;
|
||
if (this_bp_print)
|
||
print = 1;
|
||
}
|
||
|
||
bs->next = NULL; /* Terminate the chain */
|
||
bs = root_bs->next; /* Re-grab the head of the chain */
|
||
if (bs)
|
||
{
|
||
bs->stop = stop;
|
||
bs->print = print;
|
||
#if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
|
||
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;
|
||
}
|
||
|
||
int
|
||
bpstat_should_step ()
|
||
{
|
||
struct breakpoint *b;
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->enable != disabled && b->exp != NULL)
|
||
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, watchpoints)
|
||
int bnum;
|
||
int watchpoints;
|
||
{
|
||
register struct breakpoint *b;
|
||
register struct command_line *l;
|
||
register struct symbol *sym;
|
||
CORE_ADDR last_addr = (CORE_ADDR)-1;
|
||
int header_printed = 0;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (bnum == -1 || bnum == b->number)
|
||
{
|
||
if (b->address == NULL && !watchpoints)
|
||
{
|
||
if (bnum == -1)
|
||
continue;
|
||
error ("That is a watchpoint, not a breakpoint.");
|
||
}
|
||
if (b->address != NULL && watchpoints)
|
||
{
|
||
if (bnum == -1)
|
||
continue;
|
||
error ("That is a breakpoint, not a watchpoint.");
|
||
}
|
||
|
||
if (!header_printed)
|
||
{
|
||
if (watchpoints)
|
||
printf_filtered (" Enb Expression\n");
|
||
else if (addressprint)
|
||
printf_filtered (" Enb Address Where\n");
|
||
else
|
||
printf_filtered (" Enb Where\n");
|
||
header_printed = 1;
|
||
}
|
||
|
||
printf_filtered ("#%-3d %c ", b->number, "nyod"[(int) b->enable]);
|
||
if (b->address == NULL) {
|
||
printf_filtered (" ");
|
||
print_expression (b->exp, stdout);
|
||
} else {
|
||
if (addressprint)
|
||
printf_filtered (" 0x%08x ", b->address);
|
||
|
||
last_addr = b->address;
|
||
if (b->symtab)
|
||
{
|
||
sym = find_pc_function (b->address);
|
||
if (sym)
|
||
{
|
||
fputs_filtered (" in ", stdout);
|
||
fputs_demangled (SYMBOL_NAME (sym), stdout, 1);
|
||
fputs_filtered (" at ", stdout);
|
||
}
|
||
fputs_filtered (b->symtab->filename, 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 0x%x\n", 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 (!header_printed)
|
||
{
|
||
char *which = watchpoints ? "watch" : "break";
|
||
if (bnum == -1)
|
||
printf_filtered ("No %spoints.\n", which);
|
||
else
|
||
printf_filtered ("No %spoint numbered %d.\n", which, bnum);
|
||
}
|
||
|
||
/* 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);
|
||
}
|
||
|
||
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);
|
||
}
|
||
|
||
static void
|
||
watchpoints_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, 1);
|
||
}
|
||
|
||
/* 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 0x%x.\n", 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 == NULL) /* 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));
|
||
bzero (b, sizeof *b);
|
||
b->address = sal.pc;
|
||
b->symtab = sal.symtab;
|
||
b->line_number = sal.line;
|
||
b->enable = enabled;
|
||
b->next = 0;
|
||
b->silent = 0;
|
||
b->ignore_count = 0;
|
||
b->commands = NULL;
|
||
b->frame = NULL;
|
||
|
||
/* Add this breakpoint to the end of the chain
|
||
so that a list of breakpoints will come out in order
|
||
of increasing numbers. */
|
||
|
||
b1 = breakpoint_chain;
|
||
if (b1 == 0)
|
||
breakpoint_chain = b;
|
||
else
|
||
{
|
||
while (b1->next)
|
||
b1 = b1->next;
|
||
b1->next = b;
|
||
}
|
||
|
||
check_duplicates (sal.pc);
|
||
|
||
return b;
|
||
}
|
||
|
||
/* Set a breakpoint that will evaporate an end of command
|
||
at address specified by SAL.
|
||
Restrict it to frame FRAME if FRAME is nonzero. */
|
||
|
||
void
|
||
set_momentary_breakpoint (sal, frame)
|
||
struct symtab_and_line sal;
|
||
FRAME frame;
|
||
{
|
||
register struct breakpoint *b;
|
||
b = set_raw_breakpoint (sal);
|
||
b->number = -3;
|
||
b->enable = delete;
|
||
b->frame = (frame ? FRAME_FP (frame) : 0);
|
||
}
|
||
|
||
void
|
||
clear_momentary_breakpoints ()
|
||
{
|
||
register struct breakpoint *b;
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->number == -3)
|
||
{
|
||
delete_breakpoint (b);
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Tell the user we have just set a breakpoint B. */
|
||
static void
|
||
mention (b)
|
||
struct breakpoint *b;
|
||
{
|
||
if (b->exp)
|
||
{
|
||
printf_filtered ("Watchpoint %d: ", b->number);
|
||
print_expression (b->exp, stdout);
|
||
}
|
||
else
|
||
{
|
||
printf_filtered ("Breakpoint %d at 0x%x", b->number, b->address);
|
||
if (b->symtab)
|
||
printf_filtered (": file %s, line %d.",
|
||
b->symtab->filename, b->line_number);
|
||
}
|
||
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 = find_line_pc (sal.symtab, sal.line);
|
||
if (sal.pc == 0)
|
||
error ("No line %d in file \"%s\".\n", sal.line, sal.symtab->filename);
|
||
else
|
||
{
|
||
describe_other_breakpoints (sal.pc);
|
||
|
||
b = set_raw_breakpoint (sal);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->cond = 0;
|
||
b->addr_string = addr_string;
|
||
if (tempflag)
|
||
b->enable = temporary;
|
||
|
||
mention (b);
|
||
}
|
||
}
|
||
#endif
|
||
|
||
/* 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;
|
||
|
||
int i;
|
||
CORE_ADDR pc;
|
||
|
||
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);
|
||
else
|
||
sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0);
|
||
|
||
addr_end = arg;
|
||
}
|
||
|
||
if (! sals.nelts)
|
||
return;
|
||
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
sal = sals.sals[i];
|
||
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);
|
||
}
|
||
else
|
||
pc = sal.pc;
|
||
|
||
while (arg && *arg)
|
||
{
|
||
if (arg[0] == 'i' && arg[1] == 'f'
|
||
&& (arg[2] == ' ' || arg[2] == '\t'))
|
||
{
|
||
arg += 2;
|
||
cond_start = arg;
|
||
cond = parse_c_1 (&arg, block_for_pc (pc), 0);
|
||
cond_end = arg;
|
||
}
|
||
else
|
||
error ("Junk at end of arguments.");
|
||
}
|
||
sals.sals[i].pc = pc;
|
||
}
|
||
|
||
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->cond = cond;
|
||
|
||
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);
|
||
|
||
if (tempflag)
|
||
b->enable = temporary;
|
||
|
||
mention (b);
|
||
}
|
||
|
||
if (sals.nelts > 1)
|
||
{
|
||
printf ("Multiple breakpoints were set.\n");
|
||
printf ("Use the \"delete\" command to delete unwanted breakpoints.\n");
|
||
}
|
||
free (sals.sals);
|
||
}
|
||
|
||
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);
|
||
}
|
||
|
||
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 = NULL;
|
||
sal.symtab = NULL;
|
||
sal.line = 0;
|
||
|
||
/* Parse arguments. */
|
||
innermost_block = NULL;
|
||
exp = parse_c_expression (arg);
|
||
exp_valid_block = innermost_block;
|
||
val = evaluate_expression (exp);
|
||
release_value (val);
|
||
|
||
/* Now set up the breakpoint. */
|
||
b = set_raw_breakpoint (sal);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->exp = exp;
|
||
b->exp_valid_block = exp_valid_block;
|
||
b->val = val;
|
||
b->cond = 0;
|
||
b->cond_string = NULL;
|
||
mention (b);
|
||
}
|
||
|
||
/*
|
||
* Helper routine for the until_command routine in infcmd.c. Here
|
||
* because it uses the mechanisms of breakpoints.
|
||
*/
|
||
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);
|
||
|
||
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);
|
||
else
|
||
sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0);
|
||
|
||
if (sals.nelts != 1)
|
||
error ("Couldn't get information on specified line.");
|
||
|
||
sal = sals.sals[0];
|
||
free (sals.sals); /* malloc'd, so freed */
|
||
|
||
if (*arg)
|
||
error ("Junk at end of arguments.");
|
||
|
||
if (sal.pc == 0 && sal.symtab != 0)
|
||
sal.pc = find_line_pc (sal.symtab, sal.line);
|
||
|
||
if (sal.pc == 0)
|
||
error ("No line %d in file \"%s\".", sal.line, sal.symtab->filename);
|
||
|
||
set_momentary_breakpoint (sal, selected_frame);
|
||
|
||
/* 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;
|
||
set_momentary_breakpoint (sal, prev_frame);
|
||
}
|
||
|
||
proceed (-1, -1, 0);
|
||
}
|
||
|
||
/* 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 ()
|
||
{
|
||
}
|
||
|
||
struct sal_chain
|
||
{
|
||
struct sal_chain *next;
|
||
struct symtab_and_line sal;
|
||
};
|
||
|
||
/* 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;
|
||
struct sal_chain *sal_chain = 0;
|
||
|
||
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);
|
||
win:
|
||
p = p1;
|
||
while (*p == ' ' || *p == '\t') p++;
|
||
}
|
||
}
|
||
|
||
/* This shares a lot of code with `print_frame_label_vars' from stack.c. */
|
||
|
||
static struct symtabs_and_lines
|
||
get_catch_sals (this_level_only)
|
||
int this_level_only;
|
||
{
|
||
extern struct blockvector *blockvector_for_pc ();
|
||
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));
|
||
bzero (blocks_searched, 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 (! strcmp (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. */
|
||
|
||
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;
|
||
CORE_ADDR pc;
|
||
|
||
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 implemeneted");
|
||
sals = map_catch_names (arg, catch_breakpoint);
|
||
}
|
||
|
||
if (! sals.nelts)
|
||
return;
|
||
|
||
save_arg = arg;
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
sal = sals.sals[i];
|
||
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);
|
||
}
|
||
else
|
||
pc = sal.pc;
|
||
|
||
while (arg && *arg)
|
||
{
|
||
if (arg[0] == 'i' && arg[1] == 'f'
|
||
&& (arg[2] == ' ' || arg[2] == '\t'))
|
||
cond = (struct expression *) parse_c_1 ((arg += 2, &arg),
|
||
block_for_pc (pc), 0);
|
||
else
|
||
error ("Junk at end of arguments.");
|
||
}
|
||
arg = save_arg;
|
||
sals.sals[i].pc = pc;
|
||
}
|
||
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
sal = sals.sals[i];
|
||
|
||
if (from_tty)
|
||
describe_other_breakpoints (sal.pc);
|
||
|
||
b = set_raw_breakpoint (sal);
|
||
b->number = ++breakpoint_count;
|
||
b->cond = cond;
|
||
if (tempflag)
|
||
b->enable = temporary;
|
||
|
||
printf ("Breakpoint %d at 0x%x", b->number, b->address);
|
||
if (b->symtab)
|
||
printf (": file %s, line %d.", b->symtab->filename, b->line_number);
|
||
printf ("\n");
|
||
}
|
||
|
||
if (sals.nelts > 1)
|
||
{
|
||
printf ("Multiple breakpoints were set.\n");
|
||
printf ("Use the \"delete\" command to delete unwanted breakpoints.\n");
|
||
}
|
||
free (sals.sals);
|
||
}
|
||
|
||
/* 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. */
|
||
}
|
||
|
||
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->symtab == sal.symtab
|
||
&& 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->address != NULL
|
||
&& (sal.pc ? b->next->address == sal.pc
|
||
: (b->next->symtab == sal.symtab
|
||
&& 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 (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->enable == delete)
|
||
delete_breakpoint (bs->breakpoint_at);
|
||
}
|
||
|
||
/* Delete a breakpoint and clean up all traces of it in the data structures. */
|
||
|
||
static 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);
|
||
|
||
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 (xgdb_verbose && bpt->number >=0)
|
||
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 (bpt);
|
||
}
|
||
|
||
static void map_breakpoint_numbers ();
|
||
|
||
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);
|
||
}
|
||
|
||
static void
|
||
breakpoint_re_set_one (bint)
|
||
int bint;
|
||
{
|
||
struct breakpoint *b = (struct breakpoint *)bint; /* get past catch_errs */
|
||
int i;
|
||
struct symtabs_and_lines sals;
|
||
struct symtab_and_line sal;
|
||
char *s;
|
||
|
||
if (b->address != NULL && b->addr_string != NULL)
|
||
{
|
||
s = b->addr_string;
|
||
sals = decode_line_1 (&s, 1, (struct symtab *)NULL, 0);
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
sal = sals.sals[i];
|
||
|
||
b->symtab = sal.symtab;
|
||
b->line_number = sal.line;
|
||
if (sal.pc == 0 && sal.symtab != 0)
|
||
{
|
||
sal.pc = find_line_pc (sal.symtab, sal.line);
|
||
if (sal.pc == 0)
|
||
error ("No line %d in file \"%s\".",
|
||
sal.line, sal.symtab->filename);
|
||
}
|
||
b->address = sal.pc;
|
||
|
||
if (b->cond_string != NULL)
|
||
{
|
||
s = b->cond_string;
|
||
b->cond = parse_c_1 (&s, block_for_pc (sal.pc), 0);
|
||
}
|
||
|
||
check_duplicates (b->address);
|
||
|
||
mention (b);
|
||
}
|
||
free (sals.sals);
|
||
}
|
||
else
|
||
{
|
||
/* Anything without a string can't be re-set. */
|
||
delete_breakpoint (b);
|
||
}
|
||
}
|
||
|
||
/* Re-set all breakpoints after symbols have been re-loaded. */
|
||
void
|
||
breakpoint_re_set ()
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
b->symtab = 0; /* Be sure we don't point to old dead symtab */
|
||
(void) catch_errors (breakpoint_re_set_one, (int) b,
|
||
"Error in re-setting breakpoint");
|
||
}
|
||
|
||
/* Blank line to finish off all those mention() messages we just printed. */
|
||
printf_filtered ("\n");
|
||
}
|
||
|
||
/* 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 ("Will stop next time breakpoint %d is reached.", bptnum);
|
||
else if (count == 1)
|
||
printf ("Will ignore next crossing of breakpoint %d.", bptnum);
|
||
else
|
||
printf ("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, parse_and_eval_address (p), from_tty);
|
||
printf ("\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) ();
|
||
{
|
||
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;
|
||
{
|
||
bpt->enable = enabled;
|
||
|
||
if (xgdb_verbose && bpt->number >= 0)
|
||
printf ("breakpoint #%d enabled\n", bpt->number);
|
||
|
||
check_duplicates (bpt->address);
|
||
if (bpt->val != NULL)
|
||
{
|
||
if (bpt->exp_valid_block != NULL
|
||
&& !contained_in (get_selected_block (), bpt->exp_valid_block))
|
||
{
|
||
printf_filtered ("\
|
||
Cannot enable watchpoint %d because the block in which its expression\n\
|
||
is valid is not currently in scope.\n", bpt->number);
|
||
return;
|
||
}
|
||
|
||
value_free (bpt->val);
|
||
|
||
bpt->val = evaluate_expression (bpt->exp);
|
||
release_value (bpt->val);
|
||
}
|
||
}
|
||
|
||
static void
|
||
enable_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
struct breakpoint *bpt;
|
||
if (args == 0)
|
||
ALL_BREAKPOINTS (bpt)
|
||
enable_breakpoint (bpt);
|
||
else
|
||
map_breakpoint_numbers (args, enable_breakpoint);
|
||
}
|
||
|
||
static void
|
||
disable_breakpoint (bpt)
|
||
struct breakpoint *bpt;
|
||
{
|
||
bpt->enable = disabled;
|
||
|
||
if (xgdb_verbose && bpt->number >= 0)
|
||
printf ("breakpoint #%d disabled\n", bpt->number);
|
||
|
||
check_duplicates (bpt->address);
|
||
}
|
||
|
||
static void
|
||
disable_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
register struct breakpoint *bpt;
|
||
if (args == 0)
|
||
ALL_BREAKPOINTS (bpt)
|
||
disable_breakpoint (bpt);
|
||
else
|
||
map_breakpoint_numbers (args, disable_breakpoint);
|
||
}
|
||
|
||
static void
|
||
enable_once_breakpoint (bpt)
|
||
struct breakpoint *bpt;
|
||
{
|
||
bpt->enable = temporary;
|
||
|
||
check_duplicates (bpt->address);
|
||
}
|
||
|
||
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 = delete;
|
||
|
||
check_duplicates (bpt->address);
|
||
}
|
||
|
||
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);
|
||
else
|
||
sals = decode_line_1 (&string, funfirstline, (struct symtab *)NULL, 0);
|
||
if (*string)
|
||
error ("Junk at end of line specification: %s", string);
|
||
return sals;
|
||
}
|
||
|
||
|
||
/* Chain containing all defined enable commands. */
|
||
|
||
extern struct cmd_list_element
|
||
*enablelist, *disablelist,
|
||
*deletelist, *enablebreaklist;
|
||
|
||
extern struct cmd_list_element *cmdlist;
|
||
|
||
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 a C expression to be evaluated whenever\n\
|
||
breakpoint N is reached. Actually break only when COND is nonzero.");
|
||
|
||
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 all breakpoints, or breakpoint number NUMBER.\n\
|
||
Second column is \"y\" for enabled breakpoint, \"n\" for disabled,\n\
|
||
\"o\" for enabled once (disable when hit), \"d\" for enable but delete when hit.\n\
|
||
Then come the address and the file/line number.\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.");
|
||
|
||
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", watchpoints_info,
|
||
"Status of all watchpoints, or watchpoint number NUMBER.\n\
|
||
Second column is \"y\" for enabled watchpoints, \"n\" for disabled.");
|
||
}
|