由网友(用生命在耍帅)分享简介:现在的问题是找出哪些Java函数调用一些JNI函数。在Java中,这将与新Exception.printStackTrace()实现,但必须从本地进行(JNI)的功能。The problem is to find out which Java functions call some JNI function. In...
现在的问题是找出哪些Java函数调用一些JNI函数。在Java中,这将与新Exception.printStackTrace()
实现,但必须从本地进行(JNI)的功能。
The problem is to find out which Java functions call some JNI function. In Java, this would be achieved with new Exception.printStackTrace()
, but this must be done from a native (JNI) function.
由于后来发现自己的code中的最简单方法是在网络出版,我张贴这两个问题的答案。
Since the easiest way to find your own code later is to publish it in the 'net, I post both the question and the answer.
推荐答案
的JNI模拟新Exception.printStackTrace()
是:
//#include <android/log.h>
//#define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG , "~~~~~~", __VA_ARGS__)
//#define DLOG(...) __android_log_print(ANDROID_LOG_DEBUG , "~~~~~~", __VA_ARGS__)
void printStackTrace(JNIEnv *env) {
LOGD("###################################################################################printStackTrace{");
jclass cls = env->FindClass("java/lang/Exception");
if (cls != NULL) {
jmethodID constructor = env->GetMethodID(cls, "<init>", "()V");
if(constructor != NULL) {
jobject exc = env->NewObject(cls, constructor);
if(exc != NULL) {
jmethodID printStackTrace = env->GetMethodID(cls, "printStackTrace", "()V");
if(printStackTrace != NULL) {
env->CallObjectMethod(exc, printStackTrace);
} else { DLOG("err4"); }
} else { DLOG("err3"); }
env->DeleteLocalRef(exc);
} else { DLOG("err2"); }
} else { DLOG("err1"); }
/* free the local ref */
env->DeleteLocalRef(cls);
LOGD("###################################################################################printStackTrace}");
}
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