test/2235-JdkUnsafeTest/unsafe_test.cc

/*
 * Copyright (C) 2021 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 "art_method-inl.h"
#include "base/casts.h"
#include "jni.h"
#include "mirror/array.h"
#include "mirror/class-inl.h"
#include "mirror/class.h"
#include "mirror/object-inl.h"
#include "scoped_thread_state_change-inl.h"

namespace art {

extern "C" JNIEXPORT jint JNICALL Java_Main_vmJdkArrayBaseOffset(JNIEnv* env, jclass, jobject classObj) {
  ScopedObjectAccess soa(env);
  ObjPtr<mirror::Class> klass = soa.Decode<mirror::Class>(classObj);
  return mirror::Array::DataOffset(
      Primitive::ComponentSize(klass->GetComponentType()->GetPrimitiveType())).Int32Value();
}

extern "C" JNIEXPORT jint JNICALL Java_Main_vmJdkArrayIndexScale(JNIEnv* env, jclass, jobject classObj) {
  ScopedObjectAccess soa(env);
  ObjPtr<mirror::Class> klass = soa.Decode<mirror::Class>(classObj);
  return Primitive::ComponentSize(klass->GetComponentType()->GetPrimitiveType());
}

extern "C" JNIEXPORT jlong JNICALL Java_Main_jdkUnsafeTestMalloc(JNIEnv*, jclass, jlong size) {
  void* memory = malloc(dchecked_integral_cast<size_t>(size));
  CHECK(memory != nullptr);
  return reinterpret_cast64<jlong>(memory);
}

extern "C" JNIEXPORT void JNICALL Java_Main_jdkUnsafeTestFree(JNIEnv*, jclass, jlong memory) {
  void* mem = reinterpret_cast64<void*>(memory);
  CHECK(mem != nullptr);
  free(mem);
}

}  // namespace art