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/* Copyright (C) 1990 Free Software Foundation, Inc.
This file is part of GDB.
GDB is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
any later version.
GDB is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GDB; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#if !defined (BREAKPOINT_H)
#define BREAKPOINT_H 1
/* This is the maximum number of bytes a breakpoint instruction can take.
Feel free to increase it. It's just used in a few places to size
arrays that should be independent of the target architecture. */
#define BREAKPOINT_MAX 10
extern void breakpoint_re_set ();
extern void clear_momentary_breakpoints ();
extern void set_momentary_breakpoint ();
extern void set_ignore_count ();
extern void set_default_breakpoint ();
extern void mark_breakpoints_out ();
extern void breakpoint_auto_delete ();
extern void breakpoint_clear_ignore_counts ();
/* The following are for displays, which aren't really breakpoints, but
here is as good a place as any for them. */
extern void disable_current_display ();
extern void do_displays ();
extern void disable_display ();
extern void clear_displays ();
/* The follow stuff is an abstract data type "bpstat" ("breakpoint status").
This provides the ability to determine whether we have stopped at a
breakpoint, and what we should do about it. */
typedef struct bpstat__struct *bpstat;
/* Interface: */
/* 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();
/* 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();
/* Get a bpstat associated with having just stopped at address *PC
and frame address FRAME_ADDRESS. Update *PC to point at the
breakpoint (if we hit a breakpoint). */
bpstat bpstat_stop_status (/* CORE_ADDR *pc; FRAME_ADDR frame_address */);
/* Nonzero if we should print the frame. */
#define bpstat_should_print(bs) ((bs) != NULL && (bs)->print)
/* Nonzero if we should stop. */
#define bpstat_stop(bs) ((bs) != NULL && (bs)->stop)
/* Nonzero if we hit a momentary breakpoint. */
#define bpstat_momentary_breakpoint(bs) ((bs) != NULL && (bs)->momentary)
/* Nonzero if a signal that we got in wait() was due to circumstances
explained by the BS. */
/* Currently that is true iff we have hit a breakpoint. */
#define bpstat_explains_signal(bs) ((bs) != NULL)
/* 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 (/* void */);
/* 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). */
int bpstat_print (/* bpstat bs */);
/* 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 (/* bpstat *bsp; */);
/* Perform actions associated with having stopped at *BSP. */
void bpstat_do_actions (/* bpstat bs; */);
/* Modify BS so that the actions will not be performed. */
void bpstat_clear_actions (/* bpstat bs; */);
/* Implementation: */
#include "value.h"
struct bpstat__struct
{
/* Linked list because there can be two breakpoints at the
same place, and a bpstat reflects the fact that both have been hit. */
bpstat next;
/* Breakpoint that we are at. */
struct breakpoint *breakpoint_at;
/* Commands left to be done. */
struct command_line *commands;
/* Old value associated with a watchpoint. */
value old_val;
/* Nonzero if we should print the frame. Only significant for the first
bpstat in the chain. */
char print;
/* Nonzero if we should stop. Only significant for the first bpstat in
the chain. */
char stop;
/* Nonzero if we hit a momentary breakpoint. Only significant for the
first bpstat in the chain. */
char momentary;
};
#endif /* breakpoint.h not already included. */
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