/* Code dealing with dummy stack frames, for GDB, the GNU debugger.
- Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
- 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009,
- 2010, 2011 Free Software Foundation, Inc.
+ Copyright (C) 1986-2013 Free Software Foundation, Inc.
This file is part of GDB.
#include "gdbcmd.h"
#include "gdb_string.h"
#include "observer.h"
+#include "gdbthread.h"
/* Dummy frame. This saves the processor state just prior to setting
up the inferior function call. Older targets save the registers
static struct dummy_frame *dummy_frame_stack = NULL;
-/* Function: deprecated_pc_in_call_dummy (pc)
-
- Return non-zero if the PC falls in a dummy frame created by gdb for
- an inferior call. The code below which allows gdbarch_decr_pc_after_break
- is for infrun.c, which may give the function a PC without that
- subtracted out.
-
- FIXME: cagney/2002-11-23: This is silly. Surely "infrun.c" can
- figure out what the real PC (as in the resume address) is BEFORE
- calling this function.
-
- NOTE: cagney/2004-08-02: I'm pretty sure that, with the introduction of
- infrun.c:adjust_pc_after_break (thanks), this function is now
- always called with a correctly adjusted PC!
-
- NOTE: cagney/2004-08-02: Code should not need to call this. */
-
-int
-deprecated_pc_in_call_dummy (struct gdbarch *gdbarch, CORE_ADDR pc)
-{
- struct dummy_frame *dummyframe;
-
- for (dummyframe = dummy_frame_stack;
- dummyframe != NULL;
- dummyframe = dummyframe->next)
- {
- if ((pc >= dummyframe->id.code_addr)
- && (pc <= dummyframe->id.code_addr
- + gdbarch_decr_pc_after_break (gdbarch)))
- return 1;
- }
- return 0;
-}
-
/* Push the caller's state, along with the dummy frame info, onto the
dummy-frame stack. */
xfree (dummy);
}
+/* Delete any breakpoint B which is a momentary breakpoint for return from
+ inferior call matching DUMMY_VOIDP. */
+
+static int
+pop_dummy_frame_bpt (struct breakpoint *b, void *dummy_voidp)
+{
+ struct dummy_frame *dummy = dummy_voidp;
+
+ if (b->thread == pid_to_thread_id (inferior_ptid)
+ && b->disposition == disp_del && frame_id_eq (b->frame_id, dummy->id))
+ {
+ while (b->related_breakpoint != b)
+ delete_breakpoint (b->related_breakpoint);
+
+ delete_breakpoint (b);
+
+ /* Stop the traversal. */
+ return 1;
+ }
+
+ /* Continue the traversal. */
+ return 0;
+}
+
/* Pop *DUMMY_PTR, restoring program state to that before the
frame was created. */
static void
pop_dummy_frame (struct dummy_frame **dummy_ptr)
{
- struct dummy_frame *dummy;
+ struct dummy_frame *dummy = *dummy_ptr;
+
+ restore_infcall_suspend_state (dummy->caller_state);
- restore_infcall_suspend_state ((*dummy_ptr)->caller_state);
+ iterate_over_breakpoints (pop_dummy_frame_bpt, dummy);
/* restore_infcall_control_state frees inf_state,
- all that remains is to pop *dummy_ptr */
- dummy = *dummy_ptr;
+ all that remains is to pop *dummy_ptr. */
*dummy_ptr = dummy->next;
xfree (dummy);
pop_dummy_frame (dp);
}
-/* There may be stale dummy frames, perhaps left over from when a longjump took
- us out of a function that was called by the debugger. Clean them up at
- least once whenever we start a new inferior. */
+/* Drop dummy frame DUMMY_ID. Do nothing if it is not found. Do not restore
+ its state into inferior, just free its memory. */
+
+void
+dummy_frame_discard (struct frame_id dummy_id)
+{
+ struct dummy_frame **dp;
+
+ dp = lookup_dummy_frame (dummy_id);
+ if (dp)
+ remove_dummy_frame (dp);
+}
+
+/* There may be stale dummy frames, perhaps left over from when an uncaught
+ longjmp took us out of a function that was called by the debugger. Clean
+ them up at least once whenever we start a new inferior. */
static void
cleanup_dummy_frames (struct target_ops *target, int from_tty)
/* Assuming that THIS_FRAME is a dummy, return its ID. That ID is
determined by examining the NEXT frame's unwound registers using
the method dummy_id(). As a side effect, THIS dummy frame's
- dummy cache is located and and saved in THIS_PROLOGUE_CACHE. */
+ dummy cache is located and saved in THIS_PROLOGUE_CACHE. */
static void
dummy_frame_this_id (struct frame_info *this_frame,
const struct frame_unwind dummy_frame_unwind =
{
DUMMY_FRAME,
+ default_frame_unwind_stop_reason,
dummy_frame_this_id,
dummy_frame_prev_register,
NULL,
projects / deliverable / binutils-gdb.git / blobdiff