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frame, cfa: check unwind stop reason first

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Swap the unwind stop reason check and the unwinder check to allow
non-dwarf2 frame types to fail with a recoverable error.

gdb/
2013-02-11  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* dwarf2-frame.c (dwarf2_frame_cfa): Move UNWIND_UNAVAILABLE check
	earlier.
This commit is contained in:
Markus Metzger
2013-03-18 16:43:05 +01:00
parent ea001bdce2
commit 32261e5234
2 changed files with 9 additions and 4 deletions
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8
gdb/dwarf2-frame.c
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@@ -1512,16 +1512,16 @@ dwarf2_frame_cfa (struct frame_info *this_frame)
{
while (get_frame_type (this_frame) == INLINE_FRAME)
this_frame = get_prev_frame (this_frame);
if (get_frame_unwind_stop_reason (this_frame) == UNWIND_UNAVAILABLE)
throw_error (NOT_AVAILABLE_ERROR,
_("can't compute CFA for this frame: "
"required registers or memory are unavailable"));
/* This restriction could be lifted if other unwinders are known to
compute the frame base in a way compatible with the DWARF
unwinder. */
if (!frame_unwinder_is (this_frame, &dwarf2_frame_unwind)
&& !frame_unwinder_is (this_frame, &dwarf2_tailcall_frame_unwind))
error (_("can't compute CFA for this frame"));
if (get_frame_unwind_stop_reason (this_frame) == UNWIND_UNAVAILABLE)
throw_error (NOT_AVAILABLE_ERROR,
_("can't compute CFA for this frame: "
"required registers or memory are unavailable"));
return get_frame_base (this_frame);
}