72 lines
2.8 KiB
Java
72 lines
2.8 KiB
Java
/*
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* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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// Try to trigger concurrent dynamic-dump-at-exit processing by creating a race
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// between normal VM termination by the last non-daemon thread exiting, and a
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// call to Runtime.halt().
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public class ExitRace {
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static volatile int terminationPhase = 0;
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public static void main(String [] args) {
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// Need to spawn a new non-daemon thread so the main thread will
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// have time to become the DestroyJavaVM thread.
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Thread runner = new Thread("Runner") {
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public void run() {
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// This thread will be the one to trigger normal VM termination
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// when it exits. We first create a daemon thread to call
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// Runtime.halt() and then wait for it to tell us to exit.
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Thread daemon = new Thread("Daemon") {
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public void run() {
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// Let main thread go
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terminationPhase = 1;
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// Spin until main thread is active again
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while (terminationPhase == 1)
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;
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Runtime.getRuntime().halt(0); // Normal exit code
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}
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};
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daemon.setDaemon(true);
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daemon.start();
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// Wait until daemon is ready
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while (terminationPhase == 0) {
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try {
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Thread.sleep(10);
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} catch (InterruptedException cantHappen) {
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}
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}
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// Release daemon thread
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terminationPhase++;
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// Normal exit
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}
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};
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runner.start();
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}
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}
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