backtrace() missing some frames on 32bit x86_64-linux?

[FX Coudert]

Hi Roland,

> You are using an ancient version and it's likely there have been  
> relevant
> bug fixes.  Also note that signal handler unwinding for i386 processes
> (native or on x86-64) can depend on correct info in the vDSO  
> provided by
> the kernel.  So it's also possible that old kernel bugs are part of  
> your
> problem.  See if you have problems on recent software.

So, if I do not mis-interpret your opinion, it is a bug (fixed or not  
in more recent versions) in glibc or the kernel, right?

Now, if I may ask a favour, could someone with x86_64, linux and a  
recent glibc (I feel confident that some of the people with strong  
interest in glibc have that configuration) just compile and run my  
short testcase? (http://www.cygwin.com/ml/libc-alpha/2007-08/ 
msg00031.html ; copy-paster the source file and the two compile  
lines) That would certainly be by far quicker than my building a new  
kernel and new glibc.  If this is still present in later glibc/kernel  
versions, we can then make a proper bug report, otherwise I'll  
investigate to know at which point it got fixed.

Thanks for your help,
FX