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/*
* Copyright (C) 2019 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 <stdio.h>
#include <vector>
#include "android-base/logging.h"
#include "android-base/macros.h"
#include "jni.h"
#include "jvmti.h"
// Test infrastructure
#include "jvmti_helper.h"
#include "scoped_local_ref.h"
#include "test_env.h"
namespace art {
namespace Test2005PauseAllRedefineMultithreaded {
static constexpr jlong kRedefinedObjectTag = 0xDEADBEEF;
extern "C" JNIEXPORT void JNICALL
Java_art_Test2005_UpdateFieldValuesAndResumeThreads(JNIEnv* env,
jclass klass ATTRIBUTE_UNUSED,
jobjectArray threads_arr,
jclass redefined_class,
jobjectArray new_fields,
jstring default_val) {
std::vector<jthread> threads;
for (jint i = 0; i < env->GetArrayLength(threads_arr); i++) {
threads.push_back(env->GetObjectArrayElement(threads_arr, i));
}
std::vector<jfieldID> fields;
for (jint i = 0; i < env->GetArrayLength(new_fields); i++) {
fields.push_back(env->FromReflectedField(env->GetObjectArrayElement(new_fields, i)));
}
// Tag every instance of the redefined class with kRedefinedObjectTag
CHECK_EQ(jvmti_env->IterateOverInstancesOfClass(
redefined_class,
JVMTI_HEAP_OBJECT_EITHER,
[](jlong class_tag ATTRIBUTE_UNUSED,
jlong size ATTRIBUTE_UNUSED,
jlong* tag_ptr,
void* user_data ATTRIBUTE_UNUSED) -> jvmtiIterationControl {
*tag_ptr = kRedefinedObjectTag;
return JVMTI_ITERATION_CONTINUE;
},
nullptr),
JVMTI_ERROR_NONE);
jobject* objs;
jint cnt;
// Get the objects.
CHECK_EQ(jvmti_env->GetObjectsWithTags(1, &kRedefinedObjectTag, &cnt, &objs, nullptr),
JVMTI_ERROR_NONE);
// Set every field that's null
for (jint i = 0; i < cnt; i++) {
jobject obj = objs[i];
for (jfieldID field : fields) {
if (ScopedLocalRef<jobject>(env, env->GetObjectField(obj, field)).get() == nullptr) {
env->SetObjectField(obj, field, default_val);
}
}
}
LOG(INFO) << "Setting " << cnt << " objects with default values";
if (!threads.empty()) {
std::vector<jvmtiError> errs(threads.size(), JVMTI_ERROR_NONE);
CHECK_EQ(jvmti_env->ResumeThreadList(threads.size(), threads.data(), errs.data()),
JVMTI_ERROR_NONE);
}
jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(objs));
}
} // namespace Test2005PauseAllRedefineMultithreaded
} // namespace art
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