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

[Jakub Jelinek]

On Sun, Jan 04, 2015 at 11:07:31AM -0800, Mike Stump wrote:
> On Jan 4, 2015, at 9:00 AM, Bernd Edlinger <bernd.edlinger@hotmail.de> wrote:
> > It is due to a race condition in tsan itself, it cannot decide which access was the
> > previous one and which was the second one, but our tsan tests are not meant as
> > a functional test of the tsan runtime library, they are only meant to test the GCC
> > instrumentation.
> 
> Well, at least one test case that _is_ a functional test of the tsan runtime library isn’t a bad idea.

The GCC instrumentation can be tested just by scanning the *.optimized dumps
or assembly.  And perhaps the runtime test just be hidden by some special
environment variable that the user acks he doesn't main spurious FAILs.

	Jakub