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WARNING: ThreadSanitizer: data race (pid=19032)
  Atomic read of size 1 at 0x7fa59714e078 by thread T9:
    #0 pthread_mutex_lock <null> (stress+0x000000439dc5)
    #1 v8::base::LockNativeHandle(pthread_mutex_t*) /home/andre/Develop/v8/v8/out.gn/x64.debug/../../src/base/platform/mutex.cc:57:16 (libv8_libbase.so+0x000000021284)
    #2 void std::_Bind_simple<main::$_0 ()>::_M_invoke<>(std::_Index_tuple<>) /usr/bin/../lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/functional:1390:18 (stress+0x0000004b2cb8)
    #3 std::_Bind_simple<main::$_0 ()>::operator()() /usr/bin/../lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/functional:1380:16 (stress+0x0000004b2c68)
    #4 std::thread::_State_impl<std::_Bind_simple<main::$_0 ()> >::_M_run() /usr/bin/../lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/thread:196:13 (stress+0x0000004b2a9c)
    #5 execute_native_thread_routine /usr/src/debug/gcc-6.3.1-20161221/obj-x86_64-redhat-linux/x86_64-redhat-linux/libstdc++-v3/src/c++11/../../../../../libstdc++-v3/src/c++11/thread.cc:83 (libstdc++.so.6+0x0000000bb5ce)

  Previous write of size 1 at 0x7fa59714e078 by thread T8:
    #0 pthread_mutex_init <null> (stress+0x00000042580a)
    #1 v8::base::InitializeNativeHandle(pthread_mutex_t*) /home/andre/Develop/v8/v8/out.gn/x64.debug/../../src/base/platform/mutex.cc:23:12 (libv8_libbase.so+0x00000002108e)
    #2 void std::_Bind_simple<main::$_0 ()>::_M_invoke<>(std::_Index_tuple<>) /usr/bin/../lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/functional:1390:18 (stress+0x0000004b2cb8)
    #3 std::_Bind_simple<main::$_0 ()>::operator()() /usr/bin/../lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/functional:1380:16 (stress+0x0000004b2c68)
    #4 std::thread::_State_impl<std::_Bind_simple<main::$_0 ()> >::_M_run() /usr/bin/../lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/thread:196:13 (stress+0x0000004b2a9c)
    #5 execute_native_thread_routine /usr/src/debug/gcc-6.3.1-20161221/obj-x86_64-redhat-linux/x86_64-redhat-linux/libstdc++-v3/src/c++11/../../../../../libstdc++-v3/src/c++11/thread.cc:83 (libstdc++.so.6+0x0000000bb5ce)

  Location is global 'v8::base::entropy_mutex' of size 56 at 0x7fa59714e070 (libv8_libbase.so+0x000000034078)

  Thread T9 (tid=19042, running) created by main thread at:
    #0 pthread_create <null> (stress+0x000000425346)
    #1 __gthread_create /usr/src/debug/gcc-6.3.1-20161221/obj-x86_64-redhat-linux/x86_64-redhat-linux/libstdc++-v3/include/x86_64-redhat-linux/bits/gthr-default.h:662 (libstdc++.so.6+0x0000000bb8e4)
    #2 std::thread::_M_start_thread(std::unique_ptr<std::thread::_State, std::default_delete<std::thread::_State> >, void (*)()) /usr/src/debug/gcc-6.3.1-20161221/obj-x86_64-redhat-linux/x86_64-redhat-linux/libstdc++-v3/src/c++11/../../../../../libstdc++-v3/src/c++11/thread.cc:163 (libstdc++.so.6+0x0000000bb8e4)
    #3 main /home/andre/Develop/v8/stress.cc:21:18 (stress+0x0000004b2569)

  Thread T8 (tid=19041, running) created by main thread at:
    #0 pthread_create <null> (stress+0x000000425346)
    #1 __gthread_create /usr/src/debug/gcc-6.3.1-20161221/obj-x86_64-redhat-linux/x86_64-redhat-linux/libstdc++-v3/include/x86_64-redhat-linux/bits/gthr-default.h:662 (libstdc++.so.6+0x0000000bb8e4)
    #2 std::thread::_M_start_thread(std::unique_ptr<std::thread::_State, std::default_delete<std::thread::_State> >, void (*)()) /usr/src/debug/gcc-6.3.1-20161221/obj-x86_64-redhat-linux/x86_64-redhat-linux/libstdc++-v3/src/c++11/../../../../../libstdc++-v3/src/c++11/thread.cc:163 (libstdc++.so.6+0x0000000bb8e4)
    #3 main /home/andre/Develop/v8/stress.cc:21:18 (stress+0x0000004b2569)

SUMMARY: ThreadSanitizer: data race (/home/andre/Develop/v8/stress+0x439dc5) in pthread_mutex_lock
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