INNER CODE UNIT · C++

length

tiann/epic · library/src/main/cpp/epic.cpp:322

    jsize length = env->GetArrayLength(code);

    jlong cookie = 0;
    bool isNougat = api_level >= 24;
    if (isNougat) {
        // We do thus things:
        // 1. modify the code mprotect
        // 2. modify the code

        // Ideal, this two operation must be atomic. Below N, this is safe, because no one
        // modify the code except ourselves;
        // But in Android N, When the jit is working, between our step 1 and step 2,
        // if we modity the mprotect of the code, and planning to write the code,
        // the jit thread may modify the mprotect of the code meanwhile
        // we must suspend all thread to ensure the atomic operation.

        LOGV("suspend all thread.");
        cookie = epic_suspendAll(env, jclazz);

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