e68d585a8d
Do not wait for the GC locker in the periodic GC thread as the GC locker being held is an indication for being busy anyway. Reviewed-by: kbarrett, shade
89 lines
2.9 KiB
Java
89 lines
2.9 KiB
Java
/*
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* Copyright (c) 2019, 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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package gc.g1;
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/* @test
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* @bug 8218880
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* @summary Test that issuing a periodic collection while the GC locker is
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* held does not crash the VM.
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* @key gc
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* @requires vm.gc.G1
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* @modules java.base
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* @run main/othervm/native
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* -Xbootclasspath/a:.
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* -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
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* -XX:+UseG1GC -XX:G1PeriodicGCInterval=100
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* -XX:+G1PeriodicGCInvokesConcurrent
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* -Xlog:gc,gc+periodic=debug
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* gc.g1.TestPeriodicCollectionJNI
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* @run main/othervm/native
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* -Xbootclasspath/a:.
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* -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
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* -XX:+UseG1GC -XX:G1PeriodicGCInterval=100
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* -XX:-G1PeriodicGCInvokesConcurrent
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* -Xlog:gc,gc+periodic=debug
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* gc.g1.TestPeriodicCollectionJNI
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*/
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public class TestPeriodicCollectionJNI {
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static { System.loadLibrary("TestPeriodicCollectionJNI"); }
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private static native boolean blockInNative(byte[] array);
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private static native void unblock();
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public static void block() {
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if (!blockInNative(new byte[0])) {
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throw new RuntimeException("failed to acquire lock to dummy object");
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}
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}
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public static void main(String[] args) throws InterruptedException {
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long timeout = 2000;
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long startTime = System.currentTimeMillis();
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// Start thread doing JNI call
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BlockInNative blocker = new BlockInNative();
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blocker.start();
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try {
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// Wait for periodic GC timeout to trigger
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while (System.currentTimeMillis() < startTime + timeout) {
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System.out.println("Sleeping to let periodic GC trigger...");
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Thread.sleep(200);
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}
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} finally {
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unblock();
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}
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}
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}
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class BlockInNative extends Thread {
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public void run() {
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TestPeriodicCollectionJNI.block();
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}
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native void unlock();
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}
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