Re: [Libunwind-devel] RE: retrieve Stack Trace of all threads from Current process

[Lassi Tuura]

Hi,

> unw_step(&cursor) return 0, and all my previous steps are successful. That 
> means my cursor is at last frame in the stack and I can’t walk through it? 
> But why I am getting at the last frame in the stack all the time and I am not 
> able to walk full stack because of it.

Build a debug version of libunwind (configure ... --enable-debug), then set 
"UNW_DEBUG_LEVEL=5" environment variable, and re-run your program. The debug 
informations should help you determine why libunwind decided to stop the trace.

I personally know approximately nothing about unwinding with ptrace, let alone 
unwinding random other threads in other processes. But if you attach some debug 
output, others may be able to help.

Regards,
Lassi