/*
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* Copyright (C) 2013 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 "jvmti.h"
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// Test infrastructure
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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 Test1946Descriptors {
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using GetDescriptorList = jvmtiError(*)(jvmtiEnv* env, jobject loader, jint* cnt, char*** descs);
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struct DescriptorData {
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GetDescriptorList get_descriptor_list;
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};
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template <typename T>
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static void Dealloc(T* t) {
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jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(t));
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}
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template <typename T, typename ...Rest>
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static void Dealloc(T* t, Rest... rs) {
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Dealloc(t);
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Dealloc(rs...);
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}
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static void Cleanup(char** data, jint cnt) {
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for (jint i = 0; i < cnt; i++) {
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Dealloc(data[i]);
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}
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Dealloc(data);
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}
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extern "C" JNIEXPORT jobjectArray JNICALL Java_art_Test1946_getClassloaderDescriptors(
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JNIEnv* env, jclass, jobject loader) {
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DescriptorData* data = nullptr;
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if (JvmtiErrorToException(
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env, jvmti_env, jvmti_env->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)))) {
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return nullptr;
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}
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if (data == nullptr || data->get_descriptor_list == nullptr) {
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ScopedLocalRef<jclass> rt_exception(env, env->FindClass("java/lang/RuntimeException"));
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env->ThrowNew(rt_exception.get(), "Alloc tracking data not initialized.");
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return nullptr;
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}
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char** classes = nullptr;
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jint cnt = -1;
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if (JvmtiErrorToException(env, jvmti_env, data->get_descriptor_list(jvmti_env,
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loader,
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&cnt,
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&classes))) {
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return nullptr;
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}
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ScopedLocalRef<jobjectArray> arr(env, env->NewObjectArray(cnt,
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env->FindClass("java/lang/String"),
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nullptr));
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if (env->ExceptionCheck()) {
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Cleanup(classes, cnt);
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return nullptr;
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}
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for (jint i = 0; i < cnt; i++) {
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env->SetObjectArrayElement(arr.get(), i, env->NewStringUTF(classes[i]));
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if (env->ExceptionCheck()) {
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Cleanup(classes, cnt);
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return nullptr;
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}
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}
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Cleanup(classes, cnt);
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return arr.release();
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}
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static void DeallocParams(jvmtiParamInfo* params, jint n_params) {
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for (jint i = 0; i < n_params; i++) {
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Dealloc(params[i].name);
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}
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}
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extern "C" JNIEXPORT void JNICALL Java_art_Test1946_initializeTest(JNIEnv* env, jclass) {
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void* old_data = nullptr;
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if (JvmtiErrorToException(env, jvmti_env, jvmti_env->GetEnvironmentLocalStorage(&old_data))) {
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return;
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} else if (old_data != nullptr) {
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ScopedLocalRef<jclass> rt_exception(env, env->FindClass("java/lang/RuntimeException"));
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env->ThrowNew(rt_exception.get(), "Environment already has local storage set!");
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return;
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}
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DescriptorData* data = nullptr;
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if (JvmtiErrorToException(env,
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jvmti_env,
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jvmti_env->Allocate(sizeof(DescriptorData),
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reinterpret_cast<unsigned char**>(&data)))) {
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return;
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}
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memset(data, 0, sizeof(DescriptorData));
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// Get the extensions.
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jint n_ext = 0;
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jvmtiExtensionFunctionInfo* infos = nullptr;
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if (JvmtiErrorToException(env, jvmti_env, jvmti_env->GetExtensionFunctions(&n_ext, &infos))) {
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return;
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}
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for (jint i = 0; i < n_ext; i++) {
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jvmtiExtensionFunctionInfo* cur_info = &infos[i];
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if (strcmp("com.android.art.class.get_class_loader_class_descriptors", cur_info->id) == 0) {
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data->get_descriptor_list = reinterpret_cast<GetDescriptorList>(cur_info->func);
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}
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// Cleanup the cur_info
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DeallocParams(cur_info->params, cur_info->param_count);
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Dealloc(cur_info->id, cur_info->short_description, cur_info->params, cur_info->errors);
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}
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// Cleanup the array.
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Dealloc(infos);
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if (data->get_descriptor_list == nullptr) {
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ScopedLocalRef<jclass> rt_exception(env, env->FindClass("java/lang/RuntimeException"));
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env->ThrowNew(rt_exception.get(), "Unable to find memory tracking extensions.");
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return;
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}
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JvmtiErrorToException(env, jvmti_env, jvmti_env->SetEnvironmentLocalStorage(data));
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return;
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}
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} // namespace Test1946Descriptors
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} // namespace art
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