Data race on vals data structure in ep_testsuite

30: WARNING: ThreadSanitizer: data race (pid=42065)

30:   Read of size 8 at 0x7d1800060a38 by thread T18 (mutexes: write M1704):

30:     #0 std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::_S_right(std::_Rb_tree_node_base*) <null> (engine_testapp+0x00000049c503)

30:     #1 std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::_M_lower_bound(std::_Rb_tree_node<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >*, std::_Rb_tree_node<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) <null> (engine_testapp+0x0000004a30db)

30:     #2 std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::lower_bound(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) <null> (engine_testapp+0x00000049c5f6)

30:     #3 std::map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::lower_bound(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) <null> (engine_testapp+0x000000499047)

30:     #4 std::map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::operator[](std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) <null> (engine_testapp+0x00000048e3ba)

30:     #5 add_stats /home/owend/master/ep-engine/tests/ep_test_apis.cc:236 (ep_perfsuite.so+0x00000008f5b9)

30:     #6 STATWRITER_NAMESPACE::add_casted_stat(char const*, char const*, void (*)(char const*, unsigned short, char const*, unsigned int, void const*), void const*) /home/owend/master/ep-engine/src/statwriter.h:39 (ep.so+0x0000000e5673)

30:     #7 StatCheckpointVisitor::addCheckpointStat(void const*, void (*)(char const*, unsigned short, char const*, unsigned int, void const*), EventuallyPersistentStore*, RCPtr<VBucket>&) <null> (ep.so+0x0000001c120c)

30:     #8 StatCheckpointVisitor::visitBucket(RCPtr<VBucket>&) <null> (ep.so+0x0000001c10e5)

30:     #9 EventuallyPersistentStore::visit(VBucketVisitor&) /home/owend/master/ep-engine/src/ep.cc:3796 (ep.so+0x000000174559)

30:     #10 StatCheckpointTask::run() <null> (ep.so+0x0000001c155b)

30:     #11 ExecutorThread::run() /home/owend/master/ep-engine/src/executorthread.cc:113 (ep.so+0x0000001ea96d)

30:     #12 launch_executor_thread /home/owend/master/ep-engine/src/executorthread.cc:31 (ep.so+0x0000001ea0d0)

30:     #13 CouchbaseThread::run() /home/owend/master/platform/src/cb_pthreads.cc:58 (libplatform_so.so.0.1.0+0x00000000c9c7)

30:     #14 platform_thread_wrap /home/owend/master/platform/src/cb_pthreads.cc:71 (libplatform_so.so.0.1.0+0x00000000affe)

30:     #15 <null> <null> (libtsan.so.0+0x0000000230d9)

30: 

30:   Previous write of size 8 at 0x7d1800060a38 by main thread (mutexes: write M1575):

30:     #0 operator new(unsigned long) <null> (libtsan.so.0+0x000000025a33)

30:     #1 __gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::allocate(unsigned long, void const*) <null> (engine_testapp+0x0000004a6ca7)

30:     #2 std::allocator_traits<std::allocator<std::_Rb_tree_node<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >::allocate(std::allocator<std::_Rb_tree_node<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&, unsigned long) <null> (engine_testapp+0x0000004a5168)

30:     #3 std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::_M_get_node() <null> (engine_testapp+0x0000004a316f)

30:     #4 std::_Rb_tree_node<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >* std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::_M_create_node<std::piecewise_construct_t const&, std::tuple<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&>, std::tuple<> >(std::piecewise_construct_t const&, std::tuple<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&>&&, std::tuple<>&&) <null> (engine_testapp+0x00000049c6b4)

30:     #5 std::_Rb_tree_iterator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::_M_emplace_hint_unique<std::piecewise_construct_t const&, std::tuple<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&>, std::tuple<> >(std::_Rb_tree_const_iterator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::piecewise_construct_t const&, std::tuple<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&>&&, std::tuple<>&&) <null> (engine_testapp+0x00000049928e)

30:     #6 std::map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::operator[](std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) <null> (engine_testapp+0x00000048e488)

30:     #7 add_stats /home/owend/master/ep-engine/tests/ep_test_apis.cc:236 (ep_perfsuite.so+0x00000008f5b9)

30:     #8 STATWRITER_NAMESPACE::add_casted_stat(char const*, char const*, void (*)(char const*, unsigned short, char const*, unsigned int, void const*), void const*) /home/owend/master/ep-engine/src/statwriter.h:39 (ep.so+0x0000000e5673)

30:     #9 void STATWRITER_NAMESPACE::add_casted_stat<unsigned long>(char const*, unsigned long const&, void (*)(char const*, unsigned short, char const*, unsigned int, void const*), void const*) /home/owend/master/ep-engine/src/statwriter.h:48 (ep.so+0x0000000e96ae)

30:     #10 EventuallyPersistentEngine::addSeqnoVbStats(void const*, void (*)(char const*, unsigned short, char const*, unsigned int, void const*), RCPtr<VBucket> const&) /home/owend/master/ep-engine/src/ep_engine.cc:4445 (ep.so+0x0000001ad56d)

30:     #11 EventuallyPersistentEngine::doSeqnoStats(void const*, void (*)(char const*, unsigned short, char const*, unsigned int, void const*), char const*, int) /home/owend/master/ep-engine/src/ep_engine.cc:4490 (ep.so+0x0000001ad95f)

30:     #12 EventuallyPersistentEngine::getStats(void const*, char const*, int, void (*)(char const*, unsigned short, char const*, unsigned int, void const*)) /home/owend/master/ep-engine/src/ep_engine.cc:4595 (ep.so+0x0000001ae4de)

30:     #13 EvpGetStats /home/owend/master/ep-engine/src/ep_engine.cc:232 (ep.so+0x00000019851e)

30:     #14 ENGINE_ERROR_CODE std::_Bind<ENGINE_ERROR_CODE (*(engine_interface*, void const*, char const*, int, void (*)(char const*, unsigned short, char const*, unsigned int, void const*)))(engine_interface*, void const*, char const*, int, void (*)(char const*, unsigned short, char const*, unsigned int, void const*))>::__call<ENGINE_ERROR_CODE, , 0ul, 1ul, 2ul, 3ul, 4ul>(std::tuple<>&&, std::_Index_tuple<0ul, 1ul, 2ul, 3ul, 4ul>) <null> (engine_testapp+0x00000049f211)

30:     #15 ENGINE_ERROR_CODE std::_Bind<ENGINE_ERROR_CODE (*(engine_interface*, void const*, char const*, int, void (*)(char const*, unsigned short, char const*, unsigned int, void const*)))(engine_interface*, void const*, char const*, int, void (*)(char const*, unsigned short, char const*, unsigned int, void const*))>::operator()<, ENGINE_ERROR_CODE>() <null> (engine_testapp+0x00000049aa02)

30:     #16 std::_Function_handler<ENGINE_ERROR_CODE (), std::_Bind<ENGINE_ERROR_CODE (*(engine_interface*, void const*, char const*, int, void (*)(char const*, unsigned short, char const*, unsigned int, void const*)))(engine_interface*, void const*, char const*, int, void (*)(char const*, unsigned short, char const*, unsigned int, void const*))> >::_M_invoke(std::_Any_data const&) <null> (engine_testapp+0x00000049145b)

30:     #17 std::function<ENGINE_ERROR_CODE ()>::operator()() const <null> (engine_testapp+0x000000484e28)

30:     #18 call_engine_and_handle_EWOULDBLOCK /home/owend/master/memcached/programs/engine_testapp/engine_testapp.cc:127 (engine_testapp+0x00000047cf00)

30:     #19 mock_get_stats /home/owend/master/memcached/programs/engine_testapp/engine_testapp.cc:220 (engine_testapp+0x00000047d896)

30:     #20 perf_stat_latency_core /home/owend/master/ep-engine/tests/ep_perfsuite.cc:1238 (ep_perfsuite.so+0x000000063d3d)

30:     #21 perf_stat_latency /home/owend/master/ep-engine/tests/ep_perfsuite.cc:1306 (ep_perfsuite.so+0x00000006427a)

30:     #22 perf_slow_stat_latency_100vb /home/owend/master/ep-engine/tests/ep_perfsuite.cc:1365 (ep_perfsuite.so+0x00000006498c)

30:     #23 execute_test /home/owend/master/memcached/programs/engine_testapp/engine_testapp.cc:962 (engine_testapp+0x000000481776)

30:     #24 main /home/owend/master/memcached/programs/engine_testapp/engine_testapp.cc:1359 (engine_testapp+0x000000482ab1)