/*
* Create a constructor for our Proxy class. The constructor takes one
* argument, a java.lang.reflect.InvocationHandler.
*/
static void createConstructor(ClassObject* clazz, Method* meth)
{
meth->clazz = clazz;
meth->accessFlags = ACC_PUBLIC | ACC_NATIVE;
meth->name = "<init>";
meth->prototype =
gDvm.methJavaLangReflectProxy_constructorPrototype->prototype;
meth->shorty =
gDvm.methJavaLangReflectProxy_constructorPrototype->shorty;
// no pDexCode or pDexMethod
int argsSize = dvmComputeMethodArgsSize(meth) + 1;
meth->registersSize = meth->insSize = argsSize;
meth->nativeFunc = proxyConstructor;
}
/*
* Create a method in our Proxy class with the name and signature of
* the interface method it implements.
*/
static void createHandlerMethod(ClassObject* clazz, Method* dstMeth,
const Method* srcMeth)
{
dstMeth->clazz = clazz;
dstMeth->insns = (u2*) srcMeth;
dstMeth->accessFlags = ACC_PUBLIC | ACC_NATIVE;
dstMeth->name = srcMeth->name;
dstMeth->prototype = srcMeth->prototype;
dstMeth->shorty = srcMeth->shorty;
// no pDexCode or pDexMethod
int argsSize = dvmComputeMethodArgsSize(dstMeth) + 1;
dstMeth->registersSize = dstMeth->insSize = argsSize;
dstMeth->nativeFunc = proxyInvoker;
}
bool HookDalvikMethod(jmethodID jmethod){
Method *method = (Method*)jmethod;
//关键!!将目标方法修改为native方法
SET_METHOD_FLAG(method, ACC_NATIVE);
int argsSize = dvmComputeMethodArgsSize(method);
if (!dvmIsStaticMethod(method))
argsSize++;
method->registersSize = method->insSize = argsSize;
if (dvmIsNativeMethod(method)) {
method->nativeFunc = dvmResolveNativeMethod;
method->jniArgInfo = computeJniArgInfo(&method->prototype);
}
}