[Valgrind-users] Possible data race: mythread_wrapper (hg_intercepts.c:199)

[Jeffrey W. <nol...@gm...>]

Hi All,

Is it safe to ignore warnings from mythread_wrapper?

The test program causing the warning spins up 64 threads and exercises
the SecureRandom.

Jeff

==27224== Thread #2 was created
==27224==    at 0x32EF2E0BEE: clone (in /lib64/libc-2.13.so)
==27224==    by 0x32EFA05D9F: do_clone.clone.2 (in /lib64/libpthread-2.13.so)
==27224==    by 0x32EFA0731A: pthread_create@@GLIBC_2.2.5 (in
/lib64/libpthread-2.13.so)
==27224==    by 0x4A069C8: pthread_create_WRK (hg_intercepts.c:229)
==27224==    by 0x4A06AFA: pthread_create@* (hg_intercepts.c:256)
==27224==    by 0x443211: DoWorkerThreadStuff() (SecureRandomTest.cpp:76)
==27224==    by 0x4430AE: VerifySecureRandom::test_method()
(SecureRandomTest.cpp:59)
==27224==    by 0x442F3C: VerifySecureRandom_invoker() (SecureRandomTest.cpp:55)
==27224==    by 0x4281F1: boost::unit_test::ut_detail::unused
boost::unit_test::ut_detail::invoker<boost::unit_test::ut_detail::unused>::invoke<void
(*)()>(void (*&)()) (callback.hpp:56)
==27224==    by 0x428058:
boost::unit_test::ut_detail::callback0_impl_t<boost::unit_test::ut_detail::unused,
void (*)()>::invoke() (callback.hpp:89)
==27224==    by 0x540B540: ??? (in
/usr/lib64/libboost_unit_test_framework.so.1.44.0)
==27224==    by 0x53ED83D:
boost::execution_monitor::catch_signals(boost::unit_test::callback0<int>
const&) (in /usr/lib64/libboost_unit_test_framework.so.1.44.0)
==27224==
==27224== Thread #1 is the program's root thread
==27224==
==27224== Possible data race during write of size 8 at 0x7feffee60 by thread #2
==27224==    at 0x4A06AD6: mythread_wrapper (hg_intercepts.c:199)
==27224==  This conflicts with a previous read of size 8 by thread #1
==27224==    at 0x4A069DC: pthread_create_WRK (hg_intercepts.c:234)
==27224==    by 0x4A06AFA: pthread_create@* (hg_intercepts.c:256)
==27224==    by 0x443211: DoWorkerThreadStuff() (SecureRandomTest.cpp:76)
==27224==    by 0x4430AE: VerifySecureRandom::test_method()
(SecureRandomTest.cpp:59)
==27224==    by 0x442F3C: VerifySecureRandom_invoker() (SecureRandomTest.cpp:55)
==27224==    by 0x4281F1: boost::unit_test::ut_detail::unused
boost::unit_test::ut_detail::invoker<boost::unit_test::ut_detail::unused>::invoke<void
(*)()>(void (*&)()) (callback.hpp:56)
==27224==    by 0x428058:
boost::unit_test::ut_detail::callback0_impl_t<boost::unit_test::ut_detail::unused,
void (*)()>::invoke() (callback.hpp:89)
==27224==    by 0x540B540: ??? (in
/usr/lib64/libboost_unit_test_framework.so.1.44.0)
==27224==