[LLVMbugs] [Bug 5510] New: Timer class is not thread safe.

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Mon Nov 16 07:25:13 PST 2009


           Summary: Timer class is not thread safe.
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Support Libraries
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: hans at hanshq.net
                CC: llvmbugs at cs.uiuc.edu

Created an attachment (id=3824)
 --> (http://llvm.org/bugs/attachment.cgi?id=3824)
Test program

Using different instances of Timer in different threads is not safe.
When running the attached C++ code on a multiprocessor machine I get the
following error:

a.out: Timer.cpp:172: void llvm::Timer::stopTimer(): Assertion `I !=
ActiveTimers->end() && "stop but no startTimer?"' failed.

(compiled with g++ TimerTest.cpp -pthread `./llvm-config --cxxflags --ldflags

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