1 /*
2 * Copyright (C) 2021 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "base/utils.h"
18 #include "gc/heap.h"
19 #include "jni.h"
20 #include "runtime.h"
21 #include <stddef.h>
22
23 namespace art {
24 namespace HugeNativeBuf {
25
26 static constexpr size_t HUGE_SIZE = 10'000'000;
27
Java_Main_getHugeNativeBuffer(JNIEnv * env,jclass klass)28 extern "C" JNIEXPORT jobject JNICALL Java_Main_getHugeNativeBuffer(
29 JNIEnv* env, [[maybe_unused]] jclass klass) {
30 char* buffer = new char[HUGE_SIZE];
31 return env->NewDirectByteBuffer(buffer, HUGE_SIZE);
32 }
33
Java_Main_deleteHugeNativeBuffer(JNIEnv * env,jclass klass,jobject jbuffer)34 extern "C" JNIEXPORT void JNICALL Java_Main_deleteHugeNativeBuffer(
35 JNIEnv* env, [[maybe_unused]] jclass klass, jobject jbuffer) {
36 delete [] static_cast<char*>(env->GetDirectBufferAddress(jbuffer));
37 }
38
Java_Main_getGcNum(JNIEnv * env,jclass klass)39 extern "C" JNIEXPORT jint JNICALL Java_Main_getGcNum(
40 [[maybe_unused]] JNIEnv* env, [[maybe_unused]] jclass klass) {
41 return Runtime::Current()->GetHeap()->GetCurrentGcNum();
42 }
43
44 } // namespace HugeNativeBuf
45 } // namespace art
46