61 lines
1.8 KiB
Java
61 lines
1.8 KiB
Java
/*
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* Copyright (C) 2020 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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import java.util.concurrent.atomic.AtomicInteger;
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public class Main {
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private static class LazyGrandChildThread implements Runnable {
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@Override
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public void run() {}
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}
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private static class ChildThread implements Runnable {
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@Override
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public void run() {
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// Allocate memory forcing GCs and fork children.
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for (int i = 0; i < 100; ++i) {
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int [][] a = new int[10][];
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for (int j = 0; j < 10; ++j) {
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a[j] = new int[50000 * j + 20];
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a[j][17] = 1;
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}
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Thread t = new Thread(new LazyGrandChildThread());
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t.start();
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int sum = 0;
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// Make it hard to optimize out the arrays.
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for (int j = 0; j < 10; ++j) {
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sum += a[j][16] /* = 0 */ + a[j][17] /* = 1 */;
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}
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if (sum != 10) {
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System.out.println("Bad result! Was " + sum);
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}
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try {
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t.join();
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} catch (InterruptedException e) {
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System.out.println("Interrupted by " + e);
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}
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}
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System.out.println("Child finished");
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}
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}
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public static void main(String[] args) {
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System.out.println("Main Started");
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new Thread(new ChildThread()).start();
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System.out.println("Main Finished");
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}
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}
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