Initial revision

1 files changed, 129 insertions, 0 deletions

diff --git a/gdb/breakpoint.h b/gdb/breakpoint.h
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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.  */