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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <inttypes.h>
#include <memory>
#include <stdio.h>
#include <dlfcn.h>
#include "android-base/stringprintf.h"
#include "jni.h"
#include "jvmti.h"
// Test infrastructure
#include "jni_binder.h"
#include "jvmti_helper.h"
#include "test_env.h"
#include "scoped_local_ref.h"
namespace art {
namespace Test986NativeBind {
static void doUpPrintCall(JNIEnv* env, const char* function) {
ScopedLocalRef<jclass> klass(env, env->FindClass("art/Test986"));
jmethodID targetMethod = env->GetStaticMethodID(klass.get(), function, "()V");
env->CallStaticVoidMethod(klass.get(), targetMethod);
}
extern "C" JNIEXPORT void JNICALL Java_art_Test986_00024Transform_sayHi(
JNIEnv* env, jclass klass ATTRIBUTE_UNUSED) {
doUpPrintCall(env, "doSayHi");
}
extern "C" JNIEXPORT void JNICALL NoReallySayGoodbye(JNIEnv* env, jclass klass ATTRIBUTE_UNUSED) {
doUpPrintCall(env, "doSayBye");
}
static void doJvmtiMethodBind(jvmtiEnv* jvmtienv ATTRIBUTE_UNUSED,
JNIEnv* env,
jthread thread ATTRIBUTE_UNUSED,
jmethodID m,
void* address,
/*out*/void** out_address) {
ScopedLocalRef<jclass> method_class(env, env->FindClass("java/lang/reflect/Method"));
ScopedLocalRef<jobject> method_obj(env, env->ToReflectedMethod(method_class.get(), m, false));
Dl_info addr_info;
if (dladdr(address, &addr_info) == 0 || addr_info.dli_sname == nullptr) {
ScopedLocalRef<jclass> exception_class(env, env->FindClass("java/lang/Exception"));
env->ThrowNew(exception_class.get(), "dladdr failure!");
return;
}
ScopedLocalRef<jstring> sym_name(env, env->NewStringUTF(addr_info.dli_sname));
ScopedLocalRef<jclass> klass(env, env->FindClass("art/Test986"));
jmethodID upcallMethod = env->GetStaticMethodID(
klass.get(),
"doNativeMethodBind",
"(Ljava/lang/reflect/Method;Ljava/lang/String;)Ljava/lang/String;");
if (env->ExceptionCheck()) {
return;
}
ScopedLocalRef<jstring> new_symbol(env,
reinterpret_cast<jstring>(
env->CallStaticObjectMethod(klass.get(),
upcallMethod,
method_obj.get(),
sym_name.get())));
const char* new_symbol_chars = env->GetStringUTFChars(new_symbol.get(), nullptr);
if (strcmp(new_symbol_chars, addr_info.dli_sname) != 0) {
*out_address = dlsym(RTLD_DEFAULT, new_symbol_chars);
if (*out_address == nullptr) {
ScopedLocalRef<jclass> exception_class(env, env->FindClass("java/lang/Exception"));
env->ThrowNew(exception_class.get(), "dlsym failure!");
return;
}
}
env->ReleaseStringUTFChars(new_symbol.get(), new_symbol_chars);
}
extern "C" JNIEXPORT void JNICALL Java_art_Test986_setupNativeBindNotify(
JNIEnv* env ATTRIBUTE_UNUSED, jclass klass ATTRIBUTE_UNUSED) {
jvmtiEventCallbacks cb;
memset(&cb, 0, sizeof(cb));
cb.NativeMethodBind = doJvmtiMethodBind;
jvmti_env->SetEventCallbacks(&cb, sizeof(cb));
}
extern "C" JNIEXPORT void JNICALL Java_art_Test986_setNativeBindNotify(
JNIEnv* env, jclass klass ATTRIBUTE_UNUSED, jboolean enable) {
jvmtiError res = jvmti_env->SetEventNotificationMode(enable ? JVMTI_ENABLE : JVMTI_DISABLE,
JVMTI_EVENT_NATIVE_METHOD_BIND,
nullptr);
if (res != JVMTI_ERROR_NONE) {
JvmtiErrorToException(env, jvmti_env, res);
}
}
} // namespace Test986NativeBind
} // namespace art
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