Re: [Libunwind-devel] crashes trying to get a backtrace from a signal handler (ARM)

[Sven Neumann]

On Mon, 2010-08-30 at 18:21 +0200, Lassi Tuura wrote:

> > The crash always happens after unwind_step() has reached
> > __default_sa_restorer() from /lib/libc.so.0. I can't tell exactly what
> > goes wrong, but it appears that the next call to unwind_step() causes
> > the crash.
> 
> Could you build your libunwind with --enable-debug and prefix the crashing
> test run with "export UNW_DEBUG_LEVEL=1000"? That would help diagnosis.

No output at all. I have verified that I have debug output enabled by
running the Lperf-simple test. It creates tons of debug output with
UNW_DEBUG_LEVEL=1000. With test-async-sig all I get is a segfault:

# UNW_DEBUG_LEVEL=99 ./test-async-sig 
Segmentation fault


Sven