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* frame.c (frame_pop): Check to see whether there's a frame to 

which we can pop first.
This commit is contained in:
Nathan Froyd 2007-03-13 14:05:25 +00:00
parent a2f9cf0ddf
commit 348473d521
2 changed files with 17 additions and 3 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2007-03-13 Nathan Froyd <froydnj@codesourcery.com>
* frame.c (frame_pop): Check to see whether there's a frame to
which we can pop first.
2007-03-13 Nathan Froyd <froydnj@codesourcery.com>
* MAINTAINERS (Write After Approval): Add myself.

15
gdb/frame.c
View File

@ -514,13 +514,22 @@ frame_save_as_regcache (struct frame_info *this_frame)
void
frame_pop (struct frame_info *this_frame)
{
struct frame_info *prev_frame;
struct regcache *scratch;
struct cleanup *cleanups;
/* Ensure that we have a frame to pop to. */
prev_frame = get_prev_frame_1 (this_frame);
if (!prev_frame)
error (_("Cannot pop the initial frame."));
/* Make a copy of all the register values unwound from this frame.
Save them in a scratch buffer so that there isn't a race between
trying to extract the old values from the current_regcache while
at the same time writing new values into that same cache. */
struct regcache *scratch
= frame_save_as_regcache (get_prev_frame_1 (this_frame));
struct cleanup *cleanups = make_cleanup_regcache_xfree (scratch);
scratch = frame_save_as_regcache (prev_frame);
cleanups = make_cleanup_regcache_xfree (scratch);
/* FIXME: cagney/2003-03-16: It should be possible to tell the
target's register cache that it is about to be hit with a burst