https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79455
Bug ID: 79455
Summary: c-c++-common/tsan/race_on_mutex.c fails on powerpcle
starting with r244854 (where it was activated)
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: seurer at gcc dot gnu.org
Target Milestone: ---
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r244854 | jakub | 2017-01-24 02:19:37 -0600 (Tue, 24 Jan 2017) | 2 lines
* configure.tgt: Enable tsan and lsan on powerpc64{,le}-*-linux*.
When run on powerpcle the output is the same as on x86 except for one section,
the one with memset.
On x86 this part is:
Previous write of size 1 at 0x000000601300 by thread T1:
#0 pthread_mutex_init
/home/seurer/gcc/gcc-test/libsanitizer/tsan/tsan_interceptors.cc:1117
(libtsan.so.0+0x00000002c1ee)
#1 Thread1
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/tsan/race_on_mutex.c:12
(race_on_mutex.exe+0x000000400bf8)
And on power it is:
Previous write of size 8 at 0x000010011600 by thread T1:
#0 memset
/home/seurer/gcc/gcc-test/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:558
(libtsan.so.0+0x0000000360f4)
#1 pthread_mutex_init <null> (libpthread.so.0+0x00000000b61c)
#2 Thread1
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/tsan/race_on_mutex.c:12
(race_on_mutex.exe+0x000010000cb4)
It fails when run as a test because it doesn't quite match the expected pattern
/* { 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) .*" } */
>From poking around in the test case and the tsan code it looks like the test is
detecting what it should and the difference in output is mostly "cosmetic".
