gdb 5.2.1-4, gcc 3.2-7 and lyx thread problem

gdb 5.2.1-4, gcc 3.2-7 and lyx thread problem

[Ben Stanley]

Hi,

I was trying to use gdb on lyx-1.3.0cvs. I would place a breakpoint in
the lyx code (Counter::reset) and run until the program hit the
breakpoint. When that happened, gdb went crazy:

(gdb) run
[New Thread 8192 (LWP 26110)]
Unknown token, keepLyXAspectRatio, skipping.
Unknown token, keepLyXAspectRatio, skipping.
[New Cannot find thread 16385: invalid thread handle

This LyX was built with the Qt front end, and I'm told by the LyX
developers that only a single thread is used.

I then tried to find out what's going on with the threads:

(gdb) info threads
* 1 Thread 8192 (LWP 26128)  [No stack.]

lyx: SIGHUP signal caught

Segmentation fault

The segmentation fault was actually gdb, not lyx (reported by ddd).

Thus gdb is becoming internally corrupted when I use it on LyX.

I'm wondering if upgrading gdb to the latest cvs version might help
here. I'm currently using the version that comes with RH-8.0.

LyX uses lots of advanced C++.

I also have a problem with the following:

(gdb) list Counters::reset
[0] cancel
[1] all
[2] Counters::reset(std::string const&) at counters.C:174
[3] Counters::reset() at counters.C:164

That output is correct. However, trying to set a breakpoint is wrong:

(gdb) break 'Counters::reset'
[0] cancel
[1] all
[2] Counters::reset(std::string const&) at
/usr/include/c++/3.2/bits/basic_string.h:229
[3] Counters::reset() at /usr/include/c++/3.2/bits/stl_tree.h:651

This gives incorrect information on the source location of these
functions.

Quoted and unquoted versions of each command give the same answers.

Thanks for any help.

Ben.

-- 
Ben Stanley, PhD candidate
School of Information Technology and Computer Science
University of Wollongong