Comment #8 on issue 361 by [email protected]: ThreadSanitizer reports
dubious practices in V8
http://code.google.com/p/v8/issues/detail?id=361
There are more reports with v8::internal::ProfilerSignalHandler in stack.
E.g. this one:
==12593== WARNING: Possible data race during write of size 4 at 0x872ECC4:
{{{
==12593== T0 (locks held: {}):
==12593== #0 v8::internal::Ticker::ClearProfiler()
/home/kcc/v8/v8/src/log.cc:218
==12593== #1 v8::internal::Profiler::Disengage()
/home/kcc/v8/v8/src/log.cc:296
==12593== #2 v8::internal::Logger::TearDown()
/home/kcc/v8/v8/src/log.cc:1524
==12593== #3 (anonymous
namespace)::ScopedLoggerInitializer::~ScopedLoggerInitializer()
/home/kcc/v8/v8/test/cctest/test-log.cc:185
==12593== #4 TestIsLoggingPreserved()
/home/kcc/v8/v8/test/cctest/test-log.cc:728
==12593== #5 CcTest::Run() /home/kcc/v8/v8/test/cctest/cctest.h:59
==12593== #6 main /home/kcc/v8/v8/test/cctest/cctest.cc:96
==12593== Concurrent read(s) happened at (OR AFTER) these points:
==12593== T1 (locks held: {}):
==12593== #0 v8::internal::Ticker::Tick(v8::internal::TickSample*)
/home/kcc/v8/v8/src/log.cc:198
==12593== #1 v8::internal::ProfilerSignalHandler(int, siginfo*, void*)
/home/kcc/v8/v8/src/platform-linux.cc:766
==12593== #2 sem_wait@@GLIBC_2.1 /lib32/libpthread-2.7.so
==12593== #3 sem_w...@*
/tmp/tsan/drt/tsan/ts_valgrind_intercepts.c:1727
==12593== #4 v8::internal::LinuxSemaphore::Wait()
/home/kcc/v8/v8/src/platform-linux.cc:612
==12593== #5 v8::internal::Profiler::Remove(v8::internal::TickSample*)
/home/kcc/v8/v8/src/log.cc:101
==12593== #6 v8::internal::Profiler::Run()
/home/kcc/v8/v8/src/log.cc:314
==12593== #7 v8::internal::ThreadEntry(void*)
/home/kcc/v8/v8/src/platform-linux.cc:512
==12593== #8 ThreadSanitizerStartThread
/tmp/tsan/drt/tsan/ts_valgrind_intercepts.c:553
==12593== Location 0x872ECC4 is 20 bytes inside a block starting at
0x872ECB0 of size 24 allocated by T0 from heap:
==12593== #0 operator new(unsigned int)
/tmp/tsan/drt/tsan/ts_valgrind_intercepts.c:400
==12593== #1 v8::internal::Logger::Setup()
/home/kcc/v8/v8/src/log.cc:1480
==12593== #2 v8::internal::V8::Initialize(v8::internal::Deserializer*)
/home/kcc/v8/v8/src/v8.cc:61
==12593== #3 v8::V8::Initialize() /home/kcc/v8/v8/src/api.cc:2844
==12593== #4 v8::EnsureInitialized(char const*)
/home/kcc/v8/v8/src/api.cc:263
==12593== #5 v8::Context::New(v8::ExtensionConfiguration*,
v8::Handle<v8::ObjectTemplate>, v8::Handle<v8::Value>)
/home/kcc/v8/v8/src/api.cc:2906
==12593== #6 (anonymous
namespace)::ScopedLoggerInitializer::ScopedLoggerInitializer(bool)
/home/kcc/v8/v8/test/cctest/test-log.cc:178
==12593== #7 TestIsLoggingPreserved()
/home/kcc/v8/v8/test/cctest/test-log.cc:704
==12593== #8 CcTest::Run() /home/kcc/v8/v8/test/cctest/cctest.h:59
==12593== #9 main /home/kcc/v8/v8/test/cctest/cctest.cc:96
==12593== }}}
Full log attached.
Attachments:
tsan_v8.log.bz2 47.4 KB
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