[PATCH] Fix sporadic failure in g++.dg/tsan/aligned_vs_unaligned_race.C

[Jakub Jelinek]

On Wed, Jan 07, 2015 at 08:58:04AM -0800, Mike Stump wrote:
> On Jan 7, 2015, at 12:23 AM, Jakub Jelinek <jakub@redhat.com> wrote:
> > But I really don't like the busy waiting.
> 
> We’ve already determined that sched_sleep isn’t intercepted and can be used to non-busy wait.  Any reason not to use it?
> 
> > As tsan is only supported on x86_64-linux
> 
> So, I hate hardening the code to be overly non-portable when it doesn’t have to be that.  There is something enticing to me about the simplicity of sched_sleep.

Well, pthread_barrier_wait and dlopen/dlsym are already used by libtsan and
therefore have to be supported on all the architectures that support tsan.
So that method is as portable as libtsan itself.

	Jakub