1 /* 2 * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 8055008 8197901 27 * @summary Redefine EMCP and non-EMCP methods that are running in an infinite loop 28 * @library /test/lib 29 * @modules java.base/jdk.internal.misc 30 * @modules java.compiler 31 * java.instrument 32 * jdk.jartool/sun.tools.jar 33 * @run main RedefineClassHelper 34 * @run main/othervm -javaagent:redefineagent.jar -Xlog:redefine+class+iklass+add=trace,redefine+class+iklass+purge=trace,all=trace:file=all.log RedefineRunningMethods 35 */ 36 // Test is executed with full trace logging redirected to a file to ensure there is no crash during logging anonymous classes - see JDK-8197901 37 public class RedefineRunningMethods { 38 39 public static String newB = 40 "class RedefineRunningMethods$B {" + 41 " static int count1 = 0;" + 42 " static int count2 = 0;" + 43 " public static volatile boolean stop = false;" + 44 " static void localSleep() { " + 45 " try{ " + 46 " Thread.currentThread().sleep(10);" + 47 " } catch(InterruptedException ie) { " + 48 " } " + 49 " } " + 50 " public static void infinite() { " + 51 " System.out.println(\"infinite called\");" + 52 " }" + 53 " public static void infinite_emcp() { " + 54 " while (!stop) { count2++; localSleep(); }" + 55 " }" + 56 "}"; 57 58 public static String evenNewerB = 59 "class RedefineRunningMethods$B {" + 60 " static int count1 = 0;" + 61 " static int count2 = 0;" + 62 " public static volatile boolean stop = false;" + 63 " static void localSleep() { " + 64 " try{ " + 65 " Thread.currentThread().sleep(1);" + 66 " } catch(InterruptedException ie) { " + 67 " } " + 68 " } " + 69 " public static void infinite() { }" + 70 " public static void infinite_emcp() { " + 71 " System.out.println(\"infinite_emcp now obsolete called\");" + 72 " }" + 73 "}"; 74 75 static class B { 76 static int count1 = 0; 77 static int count2 = 0; 78 public static volatile boolean stop = false; 79 static void localSleep() { 80 try{ 81 Thread.currentThread().sleep(10);//sleep for 10 ms 82 } catch(InterruptedException ie) { 83 } 84 } 85 86 public static void infinite() { 87 while (!stop) { count1++; localSleep(); } 88 } 89 public static void infinite_emcp() { 90 while (!stop) { count2++; localSleep(); } 91 } 92 } 93 94 95 public static void main(String[] args) throws Exception { 96 97 new Thread() { 98 public void run() { 99 B.infinite(); 100 } 101 }.start(); 102 103 new Thread() { 104 public void run() { 105 B.infinite_emcp(); 106 } 107 }.start(); 108 109 RedefineClassHelper.redefineClass(B.class, newB); 110 111 System.gc(); 112 113 B.infinite(); 114 115 // Start a thread with the second version of infinite_emcp running 116 new Thread() { 117 public void run() { 118 B.infinite_emcp(); 119 } 120 }.start(); 121 122 for (int i = 0; i < 20 ; i++) { 123 String s = new String("some garbage"); 124 System.gc(); 125 } 126 127 RedefineClassHelper.redefineClass(B.class, evenNewerB); 128 System.gc(); 129 130 for (int i = 0; i < 20 ; i++) { 131 B.infinite(); 132 String s = new String("some garbage"); 133 System.gc(); 134 } 135 136 B.infinite_emcp(); 137 138 // purge should clean everything up. 139 B.stop = true; 140 141 for (int i = 0; i < 20 ; i++) { 142 B.infinite(); 143 String s = new String("some garbage"); 144 System.gc(); 145 } 146 } 147 }