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c++sanitizerthread-sanitizer

Force ThreadSanitizer to crash after finding a problem

I'm running ThreadSanitizer with -02 and g compiler flags and without gdb. It detects the race condition and prints the stacktraces but it continues running. I was fortunate to be monitoring.

Is there a way to force ThreadSanitizer to crash when it detects a problem?

Solution

  • You can use the halt_on_error option:

    $ g++ -o foo foo.cpp -fsanitize=thread
$ TSAN_OPTIONS=halt_on_error=1 ./foo
    Flag name Default value Description
    halt_on_error 0 Exit after first reported error

    If you'd rather have this turned on by default. Add a __tsan_default_options function to the program:

    #ifdef __SANITIZE_THREAD__
extern "C" const char* __tsan_default_options() {
    return "halt_on_error=1";
}
#endif