[Bug sanitizer/64350] New: TSAN fails after stress-testing for a while

["bernd.edlinger at hotmail dot de" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64350

            Bug ID: 64350
           Summary: TSAN fails after stress-testing for a while
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: bernd.edlinger at hotmail dot de
                CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
                    jakub at gcc dot gnu.org, kcc at gcc dot gnu.org

Hello,

I see this fatal error from the thread sanitizer, after a while of
stress-testing.

As far as I can tell the application should not hold 64 locks at that time.
Any ideas what that could be wrong here?

Thanks,
Bernd.


FATAL: ThreadSanitizer CHECK failed:
../../../../gcc-5-20141214/libsanitizer/sanitizer_common/sanitizer_deadlock_detector.h:65
"((n_all_locks_)) <
(((sizeof(all_locks_with_contexts_)/sizeof((all_locks_with_contexts_)[0]))))"
(0x40, 0x40)
    #0 __tsan::TsanCheckFailed(char const*, int, char const*, unsigned long
long, unsigned long long)
../../../../gcc-5-20141214/libsanitizer/tsan/tsan_rtl_report.cc:42
(libtsan.so.0+0x000000071793)
    #1 __tsan::TsanCheckFailed(char const*, int, char const*, unsigned long
long, unsigned long long)
../../../../gcc-5-20141214/libsanitizer/tsan/tsan_rtl_report.cc:42
(libtsan.so.0+0x00000007179b)
    #2 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long
long, unsigned long long)
../../../../gcc-5-20141214/libsanitizer/sanitizer_common/sanitizer_common.cc:72
(libtsan.so.0+0x0000000761b3)
    #3 __sanitizer::DeadlockDetectorTLS<__sanitizer::TwoLevelBitVector<1ul,
__sanitizer::BasicBitVector<unsigned long> > >::addLock(unsigned long, unsigned
long, unsigned int)
../../../../gcc-5-20141214/libsanitizer/sanitizer_common/sanitizer_deadlock_detector.h:65
(libtsan.so.0+0x000000079eed)
    #4 __sanitizer::DeadlockDetector<__sanitizer::TwoLevelBitVector<1ul,
__sanitizer::BasicBitVector<unsigned long> >
>::onLockAfter(__sanitizer::DeadlockDetectorTLS<__sanitizer::TwoLevelBitVector<1ul,
__sanitizer::BasicBitVector<unsigned long> > >*, unsigned long, unsigned int)
../../../../gcc-5-20141214/libsanitizer/sanitizer_common/sanitizer_deadlock_detector.h:214
(libtsan.so.0+0x000000079eed)
    #5 __sanitizer::DD::MutexAfterLock(__sanitizer::DDCallback*,
__sanitizer::DDMutex*, bool, bool)
../../../../gcc-5-20141214/libsanitizer/sanitizer_common/sanitizer_deadlock_detector1.cc:162
(libtsan.so.0+0x000000079eed)
    #6 __tsan::MutexLock(__tsan::ThreadState*, unsigned long, unsigned long,
int, bool) ../../../../gcc-5-20141214/libsanitizer/tsan/tsan_rtl_mutex.cc:177
(libtsan.so.0+0x00000006e1e5)
    #7 pthread_mutex_lock
../../../../gcc-5-20141214/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:2993
(libtsan.so.0+0x0000000354c7)
    #8 interlockedSet(long*, long)
/home/ed/OPCToolboxV5/Source/Core/TBUtil/Platforms.cpp:55
(CPPTestClient+0x000000ee1f06)
    #9 TB5Util::Sync::lock() include/Sync.h:218 (CPPTestClient+0x000000810842)
[...]
    #19 pthread_start platforms/linux/opcua_p_thread.c:63
(CPPTestClient+0x000000fb7403)
    #20 __tsan_thread_start_func
../../../../gcc-5-20141214/libsanitizer/tsan/tsan_interceptors.cc:885
(libtsan.so.0+0x000000023a69)
    #21 start_thread <null> (libpthread.so.0+0x000000007e99)
    #22 __clone <null> (libc.so.6+0x0000000f42ec)