K 10
svn:author
V 6
emaste
K 8
svn:date
V 27
2012-11-13T03:05:28.458223Z
K 7
svn:log
V 450
Do not unwind past a zero PC frame.

This improves GDB usability when debugging code compiled with
optimization.

Upstream GDB revision f0031b6d3ae9b164b3747986ab898190bd4dcf8c (prior
to GDB's switch to GPLv3), with frame_debug_got_null_frame expanded
inline.

| 2004-12-12  Andrew Cagney  <cagney@gnu.org>
|
| * frame.c (get_prev_frame): When unwinding normal frames, check
| that the PC isn't zero.

Sponsored by:	ADARA Networks
MFC After:	1 month

END