Hi.
Test-case mentioned in the PR looks as follows on ppc64le:
WARNING: ThreadSanitizer: data race (pid=45910)
Atomic read of size 1 at 0x000010020200 by thread T2:
#0 pthread_mutex_lock
../../../../libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:3608
(libtsan.so.0+0x000000044724)
#1 Thread2(void*)
/home/marxin/Programming/gcc/gcc/testsuite/c-c++-common/tsan/race_on_mutex.c:22
(race_on_mutex.exe+0x000010001110)
Previous write of size 8 at 0x000010020200 by thread T1:
#0 memset
../../../../libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:558
(libtsan.so.0+0x000000036194)
#1 __pthread_mutex_init <null> (libpthread.so.0+0x00000000adcc)
#2 Thread1(void*)
/home/marxin/Programming/gcc/gcc/testsuite/c-c++-common/tsan/race_on_mutex.c:12
(race_on_mutex.exe+0x000010000fe4)
compared to what's on x86_64-linux-gnu:
WARNING: ThreadSanitizer: data race (pid=8917)
Atomic read of size 1 at 0x000000602100 by thread T2:
#0 pthread_mutex_lock
../../../../libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:3608
(libtsan.so.0+0x00000003bc1f)
#1 Thread2(void*)
/home/marxin/Programming/gcc2/gcc/testsuite/c-c++-common/tsan/race_on_mutex.c:22
(race_on_mutex.exe+0x000000400f1c)
Previous write of size 1 at 0x000000602100 by thread T1:
#0 pthread_mutex_init
../../../../libsanitizer/tsan/tsan_interceptors.cc:1117
(libtsan.so.0+0x00000002bf5e)
#1 Thread1(void*)
/home/marxin/Programming/gcc2/gcc/testsuite/c-c++-common/tsan/race_on_mutex.c:12
(race_on_mutex.exe+0x000000400e99)
Bill suggested to disable memset builtin expansion, but it won't help as the
back-trace leads to libpthread.so.
Thus I'm make the scan more verbose.
Tested on both x86_64-linux-gnu and ppc64le-linux-gnu.
Ready for trunk?
Thanks,
Martin
>From 2a9a475169bc95f147d67df343458fc0f7069512 Mon Sep 17 00:00:00 2001
From: marxin <mli...@suse.cz>
Date: Mon, 24 Apr 2017 14:59:18 +0200
Subject: [PATCH] Fix test-case on ppc64le (PR testsuite/79455).
gcc/testsuite/ChangeLog:
2017-04-24 Martin Liska <mli...@suse.cz>
* c-c++-common/tsan/race_on_mutex.c: Make the scanned pattern
more generic.
---
gcc/testsuite/c-c++-common/tsan/race_on_mutex.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/gcc/testsuite/c-c++-common/tsan/race_on_mutex.c b/gcc/testsuite/c-c++-common/tsan/race_on_mutex.c
index ae30d053c92..80c193789d7 100644
--- a/gcc/testsuite/c-c++-common/tsan/race_on_mutex.c
+++ b/gcc/testsuite/c-c++-common/tsan/race_on_mutex.c
@@ -40,6 +40,6 @@ int main() {
/* { dg-output " Atomic read of size 1 at .* by thread T2:(\n|\r\n|\r)" } */
/* { dg-output " #0 pthread_mutex_lock.*" } */
/* { dg-output " #1 Thread2.* .*(race_on_mutex.c:22|\\?{2}:0) (.*)" } */
-/* { dg-output " Previous write of size 1 at .* by thread T1:(\n|\r\n|\r)" } */
-/* { dg-output " #0 pthread_mutex_init .* (.)*" } */
-/* { dg-output " #1 Thread1.* .*(race_on_mutex.c:12|\\?{2}:0) .*" } */
+/* { dg-output " Previous write of size . at .* by thread T1:(\n|\r\n|\r)" } */
+/* { dg-output " #. .*pthread_mutex_init .* (.)*" } */
+/* { dg-output " #. Thread1.* .*(race_on_mutex.c:12|\\?{2}:0) .*" } */
--
2.12.2
