Re: -fsanitize=thread support on ppc64

[Jakub Jelinek <jakub@redhat.com>]

On Mon, Jan 23, 2017 at 08:45:16AM -0600, Bill Schmidt wrote:
> > 2017-01-23  Jakub Jelinek  <jakub@redhat.com>
> > 
> > 	* configure.tgt: Enable tsan and lsan on powerpc64{,le}-*-linux*.
> > 
> > --- libsanitizer/configure.tgt.jj	2016-11-09 15:22:50.000000000 +0100
> > +++ libsanitizer/configure.tgt	2017-01-23 15:25:21.059399613 +0100
> > @@ -1,5 +1,5 @@
> > # -*- shell-script -*-
> > -#   Copyright (C) 2012 Free Software Foundation, Inc.
> > +#   Copyright (C) 2012-2017 Free Software Foundation, Inc.
> > 
> > # This program is free software; you can redistribute it and/or modify
> > # it under the terms of the GNU General Public License as published by
> > @@ -31,6 +31,11 @@ case "${target}" in
> > 	fi
> > 	;;
> >   powerpc*-*-linux*)
> 
> I think you want a separate entry for powerpc64*-*-linux* -- IIRC, the 
> existing code will definitely not work for 32-bit due to TLS differences.
> Thus be sure we don't enable TSAN for powerpc-*-linux.

That is handled by the

> > +	if test x$ac_cv_sizeof_void_p = x8; then

test (similarly how for both i?86-*-linux* and x86_64-*-linux* it is enabled
only for LP64 multilib and not others).  We want to enable it only for the
64-bit multilib, not 32-bit.

> > +		TSAN_SUPPORTED=yes
> > +		LSAN_SUPPORTED=yes
> > +		TSAN_TARGET_DEPENDENT_OBJECTS=tsan_rtl_ppc64.lo
> > +	fi
> > 	;;
> >   sparc*-*-linux*)
> > 	;;

	Jakub