| /* |
| * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 8167108 |
| * @summary Stress test java.lang.Thread.interrupt() at thread exit. |
| * @run main/othervm -Xlog:thread+smr=debug InterruptAtExit |
| */ |
| |
| import java.util.concurrent.CountDownLatch; |
| |
| public class InterruptAtExit extends Thread { |
| final static int N_THREADS = 32; |
| final static int N_LATE_CALLS = 1000; |
| |
| public CountDownLatch exitSyncObj = new CountDownLatch(1); |
| public CountDownLatch startSyncObj = new CountDownLatch(1); |
| |
| @Override |
| public void run() { |
| // Tell main thread we have started. |
| startSyncObj.countDown(); |
| try { |
| // Wait for main thread to interrupt us so we |
| // can race to exit. |
| exitSyncObj.await(); |
| } catch (InterruptedException e) { |
| // ignore because we expect one |
| } |
| } |
| |
| public static void main(String[] args) { |
| InterruptAtExit threads[] = new InterruptAtExit[N_THREADS]; |
| |
| for (int i = 0; i < N_THREADS; i++ ) { |
| threads[i] = new InterruptAtExit(); |
| int late_count = 1; |
| threads[i].start(); |
| try { |
| // Wait for the worker thread to get going. |
| threads[i].startSyncObj.await(); |
| |
| // The first interrupt() call will break the |
| // worker out of the exitSyncObj.await() call |
| // and the rest will come in during thread exit. |
| for (; late_count <= N_LATE_CALLS; late_count++) { |
| threads[i].interrupt(); |
| |
| if (!threads[i].isAlive()) { |
| // Done with Thread.interrupt() calls since |
| // thread is not alive. |
| break; |
| } |
| } |
| } catch (InterruptedException e) { |
| throw new Error("Unexpected: " + e); |
| } |
| |
| System.out.println("INFO: thread #" + i + ": made " + late_count + |
| " late calls to java.lang.Thread.interrupt()"); |
| System.out.println("INFO: thread #" + i + ": N_LATE_CALLS==" + |
| N_LATE_CALLS + " value is " + |
| ((late_count >= N_LATE_CALLS) ? "NOT " : "") + |
| "large enough to cause a Thread.interrupt() " + |
| "call after thread exit."); |
| |
| try { |
| threads[i].join(); |
| } catch (InterruptedException e) { |
| throw new Error("Unexpected: " + e); |
| } |
| threads[i].interrupt(); |
| if (threads[i].isAlive()) { |
| throw new Error("Expected !Thread.isAlive() after thread #" + |
| i + " has been join()'ed"); |
| } |
| } |
| |
| String cmd = System.getProperty("sun.java.command"); |
| if (cmd != null && !cmd.startsWith("com.sun.javatest.regtest.agent.MainWrapper")) { |
| // Exit with success in a non-JavaTest environment: |
| System.exit(0); |
| } |
| } |
| } |