Comment #3 on issue 361 by [email protected]: ThreadSanitizer reports
dubious practices in V8
http://code.google.com/p/v8/issues/detail?id=361
Another one:
WARNING: Possible data race during write of size 1 at 0x835768C: {{{
T0 (locks held: {L2}):
#0 v8::internal::ContextSwitcher::StopPreemption() src/v8threads.cc:422
#1 v8::Locker::StopPreemption() src/v8threads.cc:120
#2 TestPreemption() test/cctest/test-threads.cc:48
#3 CcTest::Run() test/cctest/cctest.h:57
#4 main test/cctest/cctest.cc:96
Concurrent read(s) happened at (OR AFTER) these points:
T1 (locks held: {}):
#0 v8::internal::ContextSwitcher::Run() src/v8threads.cc:434
#1 v8::internal::ThreadEntry(void*) src/platform-linux.cc:429
#2 ThreadSanitizerStartThread ts_valgrind_intercepts.c:504
Location 0x835768C is 12 bytes inside a block starting at 0x8357680 of
size 20
allocated by T0 from heap:
#0 malloc ts_valgrind_intercepts.c:318
#1 operator new(unsigned int) /usr/lib32/libstdc++.so.6.0.9
#2 v8::internal::ContextSwitcher::StartPreemption(int)
src/v8threads.cc:405
#3 v8::Locker::StartPreemption(int) src/v8threads.cc:115
#4 TestPreemption() test/cctest/test-threads.cc:41
#5 CcTest::Run() test/cctest/cctest.h:57
#6 main test/cctest/cctest.cc:96
Locks involved in this report (reporting last lock sites): {L2}
L2
#0 pthread_mutex_lock ts_valgrind_intercepts.c:751
#1 v8::internal::LinuxMutex::Lock() src/platform-linux.cc:495
#2 v8::internal::ThreadManager::Lock() src/v8threads.cc:181
#3 v8::Unlocker::~Unlocker() src/v8threads.cc:109
#4 v8::internal::RuntimePreempt() src/execution.cc:602
#5 v8::internal::Execution::HandleStackGuardInterrupt()
src/execution.cc:668
#6 v8::internal::Runtime_StackGuard(v8::internal::Arguments)
src/runtime.cc:4832
This one is bad. This code may not work on some HW platforms:
while (keep_going_) {
OS::Sleep(sleep_ms_);
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