Re: [Boost-users] gdb crash when loading lib with (big) Spirit grammar

Subject: Re: [Boost-users] gdb crash when loading lib with (big) Spirit grammar
From: Vladimir Prus (vladimir_at_[hidden])
Date: 2009-09-16 09:48:12

Christoph Duelli wrote:

> I have a quite big Spirit (1.38) grammar inside a lib.
> (Running OpenSuSE 11.1 Linux, gcc 4.3.2, gdb 6.8.50; both 32 bit and 64
> bit.)
> 
> When trying to debug a programm linked against this lib, gdb crashes - when
> trying to read the lib's symbol table.
> 
> (gdb) at 19281
> Attaching to process 19281
> Reading symbols from ....i_mepl_debug...done.
> Reading symbols from ....libMEPL_debug.so.6... Segmentation fault (core
> dumped)
> 
> (Note that this is not my program crashing but gdb. And no, the program is
> not buggy, has not corrupted the stack or anything like that ;-)
> 
> Debugging does work on older openSuSE (or SLES) releases, e.g. on openSuSE
> 10.3., SLES 10, SLES9.
> I have build and tried the latest gdb release, but it shows the same
> behaviour as the one part of the release.
> 
> A stack trace of the gdb core showed that the crash seems to have occured in
> cplus_demangle_v3.
> 
> I have searched google and found some postings that indicate the issue might
> stem from too long symbols being generated for Spirit (or Xpressive)
> constructs. (A quick glance on nm output shows, there are some symbols of
> some 1000 characters in size. Might be even longer ones.)
> 
> 
> Has anyone else stumbled upon this and maybe found out what the culprit is?
> A bug in gcc? gdb? name (de)mangling?

If gdb crashes, this is a bug in GDB, so please report it to their bugzilla.

- Volodya