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Re: -fsanitize=thread support on ppc64


On Mon, Jan 23, 2017 at 08:22:30AM -0600, Bill Schmidt wrote:
> TSan support was contributed to LLVM by a student working at one of the US 
> National Labs a while back.  I helped him with some of the PPC assembly
> programming.  To my knowledge this is working, but I haven't tested this with
> GCC.  Do you think we want to change the configuration for GCC this late in the
> release?  I can run a quick test with TSan turned on to see where we're at.

I think it should be enabled if it works, even this late.
I bet we need something like the following patch on top of
the PR79168 patch.

I'll test both patches on both ppc64le and ppc64.

Another question is, it seems upstream has s390{,x}-*-linux* support for
asan/ubsan, does that work?  In that case we should add it to configure.tgt
too (similarly to the sparc*-*-linux* entry).

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 "${target}" in
 	fi
 	;;
   powerpc*-*-linux*)
+	if test x$ac_cv_sizeof_void_p = x8; then
+		TSAN_SUPPORTED=yes
+		LSAN_SUPPORTED=yes
+		TSAN_TARGET_DEPENDENT_OBJECTS=tsan_rtl_ppc64.lo
+	fi
 	;;
   sparc*-*-linux*)
 	;;


	Jakub


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