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