Re: [Libunwind-devel] UNW_EINVAL stepping past _L_lock_686 in pthread_mutex_lock

[Arun Sharma]

On Mon, Sep 29, 2014 at 9:02 AM, Jared Cantwell
<address@hidden> wrote:
> Thanks Arun!  I can confirm that this patch works for me on 12.04 with
> tip of libunwind.  Thanks a lot for your efforts in getting to the
> bottom of this.  We will integrate this patch and begin testing with
> it right away, and I will report back if we encounter any problems.
> Unfortunately, I don't think our uses of libunwind will address
> whether or not the patch has an impact on performance though.

I couldn't measure any perf impact using Lperf-simple. Went ahead and pushed it.

Other dwarf architectures may want to do something similar. In the
meanwhile, if this affects unwind perf for any of your workloads,
please report it to the list.

 -Arun