From 348473d521cdd873312796f2753862d118c1ac99 Mon Sep 17 00:00:00 2001 From: Nathan Froyd Date: Tue, 13 Mar 2007 14:05:25 +0000 Subject: * frame.c (frame_pop): Check to see whether there's a frame to which we can pop first. --- gdb/frame.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) (limited to 'gdb/frame.c') diff --git a/gdb/frame.c b/gdb/frame.c index a40bbb219c3..8a14b29ede3 100644 --- a/gdb/frame.c +++ b/gdb/frame.c @@ -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 -- cgit v1.2.1