[HELP] ubacktrace() problem

[Mark Wielaard]

On Thu, Jan 14, 2016 at 11:40:19AM +0800, Jinhua Luo wrote:
> Maybe the glibc and its debuginfo on Debian8 is bad?

Unfortunately it is indeed. In theory you won't need debuginfo just for
backtraces if debian could enable -fasynchronous-unwind-tables:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=746426
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=746516

The other issue is that depending on version debian uses
.zdebug or SHF_COMPRESSED debug sections in their debug
packages. This is partially supported by systemtap (through elfutils)
for some debuginfo, but not for .debug_frame if that is
required for unwinding. This has also been an issue for
other tools like valgrind:
https://bugs.kde.org/show_bug.cgi?id=303877
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=810295

Cheers,

Mark