129 lines
4.9 KiB
C++
129 lines
4.9 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <dlfcn.h>
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#include <inttypes.h>
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#include <cstdio>
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#include <memory>
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#include "android-base/stringprintf.h"
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#include "jni.h"
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#include "jvmti.h"
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// Test infrastructure
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#include "jni_binder.h"
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#include "jvmti_helper.h"
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#include "scoped_local_ref.h"
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#include "test_env.h"
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namespace art {
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namespace Test986NativeBind {
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static void doUpPrintCall(JNIEnv* env, const char* function) {
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ScopedLocalRef<jclass> klass(env, env->FindClass("art/Test986"));
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jmethodID targetMethod = env->GetStaticMethodID(klass.get(), function, "()V");
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env->CallStaticVoidMethod(klass.get(), targetMethod);
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}
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extern "C" JNIEXPORT void JNICALL Java_art_Test986_00024Transform_sayHi__(
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JNIEnv* env, jclass klass ATTRIBUTE_UNUSED) {
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doUpPrintCall(env, "doSayHi");
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}
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extern "C" JNIEXPORT void JNICALL Java_art_Test986_00024Transform_sayHi2(
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JNIEnv* env, jclass klass ATTRIBUTE_UNUSED) {
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doUpPrintCall(env, "doSayHi2");
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}
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extern "C" JNIEXPORT void JNICALL NoReallySayGoodbye(JNIEnv* env, jclass klass ATTRIBUTE_UNUSED) {
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doUpPrintCall(env, "doSayBye");
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}
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static void doJvmtiMethodBind(jvmtiEnv* jvmtienv ATTRIBUTE_UNUSED,
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JNIEnv* env,
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jthread thread ATTRIBUTE_UNUSED,
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jmethodID m,
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void* address,
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/*out*/void** out_address) {
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ScopedLocalRef<jclass> method_class(env, env->FindClass("java/lang/reflect/Method"));
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ScopedLocalRef<jobject> method_obj(env, env->ToReflectedMethod(method_class.get(), m, false));
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Dl_info addr_info;
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if (dladdr(address, &addr_info) == 0 || addr_info.dli_sname == nullptr) {
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ScopedLocalRef<jclass> exception_class(env, env->FindClass("java/lang/Exception"));
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env->ThrowNew(exception_class.get(), "dladdr failure!");
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return;
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}
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ScopedLocalRef<jstring> sym_name(env, env->NewStringUTF(addr_info.dli_sname));
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ScopedLocalRef<jclass> klass(env, env->FindClass("art/Test986"));
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jmethodID upcallMethod = env->GetStaticMethodID(
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klass.get(),
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"doNativeMethodBind",
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"(Ljava/lang/reflect/Method;Ljava/lang/String;)Ljava/lang/String;");
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if (env->ExceptionCheck()) {
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return;
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}
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ScopedLocalRef<jstring> new_symbol(env,
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reinterpret_cast<jstring>(
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env->CallStaticObjectMethod(klass.get(),
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upcallMethod,
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method_obj.get(),
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sym_name.get())));
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const char* new_symbol_chars = env->GetStringUTFChars(new_symbol.get(), nullptr);
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if (strcmp(new_symbol_chars, addr_info.dli_sname) != 0) {
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*out_address = dlsym(RTLD_DEFAULT, new_symbol_chars);
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if (*out_address == nullptr) {
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ScopedLocalRef<jclass> exception_class(env, env->FindClass("java/lang/Exception"));
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env->ThrowNew(exception_class.get(), "dlsym failure!");
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return;
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}
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}
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env->ReleaseStringUTFChars(new_symbol.get(), new_symbol_chars);
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}
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extern "C" JNIEXPORT void JNICALL Java_art_Test986_setupNativeBindNotify(
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JNIEnv* env ATTRIBUTE_UNUSED, jclass klass ATTRIBUTE_UNUSED) {
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jvmtiEventCallbacks cb;
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memset(&cb, 0, sizeof(cb));
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cb.NativeMethodBind = doJvmtiMethodBind;
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jvmti_env->SetEventCallbacks(&cb, sizeof(cb));
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}
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extern "C" JNIEXPORT void JNICALL Java_art_Test986_setNativeBindNotify(
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JNIEnv* env, jclass klass ATTRIBUTE_UNUSED, jboolean enable) {
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jvmtiError res = jvmti_env->SetEventNotificationMode(enable ? JVMTI_ENABLE : JVMTI_DISABLE,
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JVMTI_EVENT_NATIVE_METHOD_BIND,
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nullptr);
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if (res != JVMTI_ERROR_NONE) {
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JvmtiErrorToException(env, jvmti_env, res);
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}
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}
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extern "C" JNIEXPORT void JNICALL Java_art_Test986_rebindTransformClass(
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JNIEnv* env, jclass klass ATTRIBUTE_UNUSED, jclass k) {
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JNINativeMethod m[2];
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m[0].name = "sayHi";
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m[0].signature = "()V";
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m[0].fnPtr = reinterpret_cast<void*>(Java_art_Test986_00024Transform_sayHi__);
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m[1].name = "sayHi2";
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m[1].signature = "()V";
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m[1].fnPtr = reinterpret_cast<void*>(Java_art_Test986_00024Transform_sayHi2);
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env->RegisterNatives(k, m, 2);
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}
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} // namespace Test986NativeBind
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} // namespace art
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