Date: Mon, 14 Nov 2022 19:08:45 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 267768] Simple OpenMP example with thread sanitizer (-fsanitize=thread) Message-ID: <bug-267768-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D267768 Bug ID: 267768 Summary: Simple OpenMP example with thread sanitizer (-fsanitize=3Dthread) Product: Base System Version: 13.1-STABLE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: misc Assignee: bugs@FreeBSD.org Reporter: yuri@freebsd.org Attachment #238078 text/plain mime type: Created attachment 238078 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D238078&action= =3Dedit openmp.cpp The attached code crashes when compiler like this: > c++ openmp.cpp -fsanitize=3Dthread -g -fopenmp The executable SEDVs. But in debugger it prints this: (gdb) r Starting program: /usr/home/yuri/Downloads/a.out=20 Warning: please export TSAN_OPTIONS=3D'ignore_noninstrumented_modules=3D1' = to avoid false positive reports from the OpenMP runtime! [New LWP 464093 of process 56986] [New LWP 464094 of process 56986] [New LWP 464095 of process 56986] [New LWP 464096 of process 56986] [Detaching after fork from child process 56987] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D WARNING: ThreadSanitizer: data race (pid=3D56986) Atomic read of size 1 at 0x7b6800001740 by main thread: #0 pthread_mutex_lock /disk-samsung/freebsd-src/contrib/llvm-project/compiler-rt/lib/sanitizer_co= mmon/sanitizer_common_interceptors.inc:4324:3 (a.out+0x27a256) #1 __kmp_lock_suspend_mx /disk-samsung/freebsd-src/contrib/llvm-project/openmp/runtime/src/z_Linux_u= til.cpp:1381:16 (libomp.so+0xcd206) #2 void __kmp_resume_template<kmp_flag_64<false, true> >(int, kmp_flag_64<false, true>*) /disk-samsung/freebsd-src/contrib/llvm-project/openmp/runtime/src/z_Linux_u= til.cpp:1594:3 (libomp.so+0xcd206) Previous write of size 1 at 0x7b6800001740 by thread T2: #0 _pthread_mutex_init /disk-samsung/freebsd-src/contrib/llvm-project/compiler-rt/lib/tsan/rtl/tsa= n_interceptors_posix.cpp:1316:3 (a.out+0x2655eb) #1 __kmp_suspend_initialize_thread /disk-samsung/freebsd-src/contrib/llvm-project/openmp/runtime/src/z_Linux_u= til.cpp:1348:14 (libomp.so+0xcbc27) Location is heap block of size 1504 at 0x7b6800001200 allocated by main thread: #0 malloc /disk-samsung/freebsd-src/contrib/llvm-project/compiler-rt/lib/tsan/rtl/tsa= n_interceptors_posix.cpp:667:5 (a.out+0x262e8e) #1 ___kmp_allocate_align(unsigned long, unsigned long) /disk-samsung/freebsd-src/contrib/llvm-project/openmp/runtime/src/kmp_alloc= .cpp:1882:25 (libomp.so+0x54d3c) #2 ___kmp_allocate /disk-samsung/freebsd-src/contrib/llvm-project/openmp/runtime/src/kmp_alloc= .cpp:1934:9 (libomp.so+0x54d3c) Thread T2 (tid=3D464095, running) created by main thread at: #0 pthread_create /disk-samsung/freebsd-src/contrib/llvm-project/compiler-rt/lib/tsan/rtl/tsa= n_interceptors_posix.cpp:1022:3 (a.out+0x264435) #1 __kmp_create_worker /disk-samsung/freebsd-src/contrib/llvm-project/openmp/runtime/src/z_Linux_u= til.cpp:803:7 (libomp.so+0xca8d8) SUMMARY: ThreadSanitizer: data race /disk-samsung/freebsd-src/contrib/llvm-project/openmp/runtime/src/z_Linux_u= til.cpp:1381:16 in __kmp_lock_suspend_mx =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D [LWP 464095 of process 56986 exited] [LWP 464094 of process 56986 exited] [LWP 464096 of process 56986 exited] ThreadSanitizer: reported 1 warnings [LWP 464093 of process 56986 exited] [Inferior 1 (process 56986) exited with code 0102] --=20 You are receiving this mail because: You are the assignee for the bug.=
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