Function DoAttach

pydevd_attach_to_process/linux_and_mac/attach.cpp:56–95

extern "C" int DoAttach(bool isDebug, const char *command, bool showDebugInfo);

int DoAttach(bool isDebug, const char *command, bool showDebugInfo)
{
    void *module = dlopen(nullptr, 0x2);
    DEFINE_PROC(isInitFunc, Py_IsInitialized*, "Py_IsInitialized", 1);
    DEFINE_PROC(gilEnsure, PyGILState_Ensure*, "PyGILState_Ensure", 51);
    DEFINE_PROC(gilRelease, PyGILState_Release*, "PyGILState_Release", 51);


    if(!isInitFunc()){
        if(showDebugInfo){
            printf("Py_IsInitialized returned false.\n");
        }
        return 2;
    }

    PythonVersion version = GetPythonVersion(module);

    DEFINE_PROC(interpHead, PyInterpreterState_Head*, "PyInterpreterState_Head", 51);

    auto head = interpHead();
    if (head == nullptr) {
        // this interpreter is loaded but not initialized.
        if(showDebugInfo){
            printf("Interpreter not initialized!\n");
        }
        return 54;
    }

    // Note: unlike windows where we have to do many things to enable threading
    // to work to get the gil, here we'll be executing in an existing thread,
    // so, it's mostly a matter of getting the GIL and running it and we shouldn't
    // have any more problems.

    DEFINE_PROC(pyRun_SimpleString, PyRun_SimpleString*, "PyRun_SimpleString", 51);
    
    GilHolder gilLock(gilEnsure, gilRelease);   // acquire and hold the GIL until done...
    
    pyRun_SimpleString(command);
    return 0;
}


// This is the function which enables us to set the sys.settrace for all the threads