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* frame.c (get_prev_frame_1): Work around GCC bug.

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* frame.h: Add comment about GCC bug.
This commit is contained in:
Mark Kettenis
2004-05-07 23:19:14 +00:00
parent 2b4855ab6b
commit 756e95f198
3 changed files with 26 additions and 6 deletions
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10
gdb/frame.c
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@ -1609,6 +1609,7 @@ static struct frame_info *
get_prev_frame_1 (struct frame_info *this_frame)
{
struct frame_info *prev_frame;
struct frame_id this_id;
gdb_assert (this_frame != NULL);
@ -1646,7 +1647,8 @@ get_prev_frame_1 (struct frame_info *this_frame)
/* Check that this frame's ID was valid. If it wasn't, don't try to
unwind to the prev frame. Be careful to not apply this test to
the sentinel frame. */
if (this_frame->level >= 0 && !frame_id_p (get_frame_id (this_frame)))
this_id = get_frame_id (this_frame);
if (this_frame->level >= 0 && !frame_id_p (this_id))
{
if (frame_debug)
{
@ -1663,16 +1665,14 @@ get_prev_frame_1 (struct frame_info *this_frame)
go backwards) and sentinel frames (the test is meaningless). */
if (this_frame->next->level >= 0
&& this_frame->next->type != SIGTRAMP_FRAME
&& frame_id_inner (get_frame_id (this_frame),
get_frame_id (this_frame->next)))
&& frame_id_inner (this_id, get_frame_id (this_frame->next)))
error ("Previous frame inner to this frame (corrupt stack?)");
/* Check that this and the next frame are not identical. If they
are, there is most likely a stack cycle. As with the inner-than
test above, avoid comparing the inner-most and sentinel frames. */
if (this_frame->level > 0
&& frame_id_eq (get_frame_id (this_frame),
get_frame_id (this_frame->next)))
&& frame_id_eq (this_id, get_frame_id (this_frame->next)))
error ("Previous frame identical to this frame (corrupt stack?)");
/* Allocate the new frame but do not wire it in to the frame chain.