tsan does not recognize QMutex

[GoogleCodeExporter]

What steps will reproduce the problem?

Compile and run the test program below.

What is the expected output? What do you see instead?

Tsan should recognize the QMutex as a synchronizing mechanism and not print a 
warning. The example works like expected using ab boost:mutex instead.

What version of the product are you using? On what operating system?

llvm-3.4 on centos-6.5 x86_64

Please provide any additional information below.

    #include <QtConcurrentRun>
    #include <QMutex>
    #include <iostream>
    #include <boost/thread/mutex.hpp>

    class TestClass
    {
    public:
     void fun()
     {
      QMutexLocker autoMutex(&mutex);
      //boost::mutex::scoped_lock bautoMutex(bmutex);
      data = 1;
     }
    private:
     int data;
     QMutex mutex;
     boost::mutex bmutex;
    };

    int main()
    {
     TestClass *tc = new TestClass;

     QFuture<void> t1 = QtConcurrent::run(tc, &TestClass::fun);
     QFuture<void> t2 = QtConcurrent::run(tc, &TestClass::fun);

     t1.waitForFinished();
     t2.waitForFinished();

     return 0;
    }

Original issue reported on code.google.com by benjamin...@wincor-nixdorf.com on 10 Mar 2014 at 1:10

[GoogleCodeExporter]

Hi,

Thanks for the report.

Does QT accept patches from community?

Please also file an issue against QT. Let's see what interest are there.

Original comment by dvyu...@google.com on 11 Mar 2014 at 6:08

• Added labels: Type-Enhancement
• Removed labels: Type-Defect

[GoogleCodeExporter]

The Qt bug report was closed because it's "not our issue": 
https://bugreports.qt.io/browse/QTBUG-37402

However they do accept patches if someone is able to fix the issue in the way 
they want you to...

Original comment by cbpar...@gmail.com on 2 Feb 2015 at 8:37