visualstudio_py_debugger.py 文件源码

def intercept_threads(for_attach = False):
    thread.start_new_thread = thread_creator
    thread.start_new = thread_creator

    # If threading has already been imported (i.e. we're attaching), we must hot-patch threading._start_new_thread
    # so that new threads started using it will be intercepted by our code.
    #
    # On the other hand, if threading has not been imported, we must not import it ourselves, because it will then
    # treat the current thread as the main thread, which is incorrect when attaching because this code is executing
    # on an ephemeral debugger attach thread that will go away shortly. We don't need to hot-patch it in that case
    # anyway, because it will pick up the new thread.start_new_thread that we have set above when it's imported.
    global _threading
    if _threading is None and 'threading' in sys.modules:
        import threading
        _threading = threading
        _threading._start_new_thread = thread_creator

    global _INTERCEPTING_FOR_ATTACH
    _INTERCEPTING_FOR_ATTACH = for_attach

## Modified parameters by Don Jayamanne
# Accept current Process id to pass back to debugger