https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66756
Melven.Roehrig-Zoellner at DLR dot de changed:
What |Removed |Added
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CC| |Melven.Roehrig-Zoellner@DLR
| |.de
--- Comment #4 from Melven.Roehrig-Zoellner at DLR dot de ---
I also obtain this with GCC 6.1.0.
Identical setup leads to:
> ./a.out
==================
WARNING: ThreadSanitizer: lock-order-inversion (potential deadlock) (pid=5480)
Cycle in lock order graph: M20 (0x7f0a157f3b60) => M21 (0x7d580000f3d0) =>
M20
Mutex M21 acquired here while holding mutex M20 in main thread:
#0 pthread_mutex_lock
/tools/modulesystem/tools/gcc/gcc-6.1.0/src/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:3308
(libtsan.so.0+0x000000035c7e)
#1 __gthread_mutex_lock ../libgcc/gthr-default.h:748
(libgfortran.so.3+0x0000000e4078)
#2 insert_unit
/tools/modulesystem/tools/gcc/gcc-6.1.0/src/libgfortran/io/unit.c:220
(libgfortran.so.3+0x0000000e4078)
#3 main test.f90:3 (a.out+0x000000400b30)
Hint: use TSAN_OPTIONS=second_deadlock_stack=1 to get more informative
warning message
Mutex M20 acquired here while holding mutex M21 in main thread:
#0 pthread_mutex_lock
/tools/modulesystem/tools/gcc/gcc-6.1.0/src/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:3308
(libtsan.so.0+0x000000035c7e)
#1 __gthread_mutex_lock ../libgcc/gthr-default.h:748
(libgfortran.so.3+0x0000000e4ab6)
#2 close_unit_1
/tools/modulesystem/tools/gcc/gcc-6.1.0/src/libgfortran/io/unit.c:707
(libgfortran.so.3+0x0000000e4ab6)
#3 main test.f90:3 (a.out+0x000000400b30)
SUMMARY: ThreadSanitizer: lock-order-inversion (potential deadlock)
../libgcc/gthr-default.h:748 in __gthread_mutex_lock
==================
ThreadSanitizer: reported 1 warnings
This prevents me from doing automated thread-sanitizer tests in our Fortran
software.
