147 lines
4.8 KiB
Java
147 lines
4.8 KiB
Java
/*
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* Copyright (c) 2014, 2016, 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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* @test
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* @bug 8055008
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* @summary Redefine EMCP and non-EMCP methods that are running in an infinite loop
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* @modules java.compiler
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* java.instrument
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* jdk.jartool/sun.tools.jar
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* @run main RedefineClassHelper
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* @run main/othervm -javaagent:redefineagent.jar -Xlog:redefine+class+iklass+add=trace,redefine+class+iklass+purge=trace RedefineRunningMethods
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*/
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public class RedefineRunningMethods {
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public static String newB =
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"class RedefineRunningMethods$B {" +
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" static int count1 = 0;" +
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" static int count2 = 0;" +
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" public static volatile boolean stop = false;" +
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" static void localSleep() { " +
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" try{ " +
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" Thread.currentThread().sleep(10);" +
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" } catch(InterruptedException ie) { " +
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" } " +
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" } " +
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" public static void infinite() { " +
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" System.out.println(\"infinite called\");" +
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" }" +
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" public static void infinite_emcp() { " +
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" while (!stop) { count2++; localSleep(); }" +
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" }" +
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"}";
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public static String evenNewerB =
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"class RedefineRunningMethods$B {" +
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" static int count1 = 0;" +
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" static int count2 = 0;" +
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" public static volatile boolean stop = false;" +
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" static void localSleep() { " +
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" try{ " +
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" Thread.currentThread().sleep(1);" +
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" } catch(InterruptedException ie) { " +
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" } " +
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" } " +
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" public static void infinite() { }" +
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" public static void infinite_emcp() { " +
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" System.out.println(\"infinite_emcp now obsolete called\");" +
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" }" +
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"}";
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static class B {
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static int count1 = 0;
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static int count2 = 0;
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public static volatile boolean stop = false;
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static void localSleep() {
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try{
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Thread.currentThread().sleep(10);//sleep for 10 ms
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} catch(InterruptedException ie) {
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}
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}
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public static void infinite() {
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while (!stop) { count1++; localSleep(); }
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}
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public static void infinite_emcp() {
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while (!stop) { count2++; localSleep(); }
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}
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}
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public static void main(String[] args) throws Exception {
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new Thread() {
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public void run() {
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B.infinite();
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}
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}.start();
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new Thread() {
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public void run() {
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B.infinite_emcp();
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}
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}.start();
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RedefineClassHelper.redefineClass(B.class, newB);
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System.gc();
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B.infinite();
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// Start a thread with the second version of infinite_emcp running
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new Thread() {
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public void run() {
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B.infinite_emcp();
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}
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}.start();
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for (int i = 0; i < 20 ; i++) {
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String s = new String("some garbage");
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System.gc();
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}
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RedefineClassHelper.redefineClass(B.class, evenNewerB);
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System.gc();
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for (int i = 0; i < 20 ; i++) {
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B.infinite();
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String s = new String("some garbage");
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System.gc();
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}
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B.infinite_emcp();
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// purge should clean everything up.
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B.stop = true;
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for (int i = 0; i < 20 ; i++) {
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B.infinite();
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String s = new String("some garbage");
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System.gc();
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}
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}
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}
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