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 8010319 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 38 39 // package access top-level class to avoid problem with RedefineClassHelper 40 // and nested types. 41 class RedefineRunningMethods_B { 42 static int count1 = 0; 43 static int count2 = 0; 44 public static volatile boolean stop = false; 45 static void localSleep() { 46 try{ 47 Thread.currentThread().sleep(10);//sleep for 10 ms 48 } catch(InterruptedException ie) { 49 } 50 } 51 52 public static void infinite() { 53 while (!stop) { count1++; localSleep(); } 54 } 55 public static void infinite_emcp() { 56 while (!stop) { count2++; localSleep(); } 57 } 58 } 59 60 public class RedefineRunningMethods { 61 62 public static String newB = 63 "class RedefineRunningMethods_B {" + 64 " static int count1 = 0;" + 65 " static int count2 = 0;" + 66 " public static volatile boolean stop = false;" + 67 " static void localSleep() { " + 68 " try{ " + 69 " Thread.currentThread().sleep(10);" + 70 " } catch(InterruptedException ie) { " + 71 " } " + 72 " } " + 73 " public static void infinite() { " + 74 " System.out.println(\"infinite called\");" + 75 " }" + 76 " public static void infinite_emcp() { " + 77 " while (!stop) { count2++; localSleep(); }" + 78 " }" + 79 "}"; 80 81 public static String evenNewerB = 82 "class RedefineRunningMethods_B {" + 83 " static int count1 = 0;" + 84 " static int count2 = 0;" + 85 " public static volatile boolean stop = false;" + 86 " static void localSleep() { " + 87 " try{ " + 88 " Thread.currentThread().sleep(1);" + 89 " } catch(InterruptedException ie) { " + 90 " } " + 91 " } " + 92 " public static void infinite() { }" + 93 " public static void infinite_emcp() { " + 94 " System.out.println(\"infinite_emcp now obsolete called\");" + 95 " }" + 96 "}"; 97 98 99 public static void main(String[] args) throws Exception { 100 101 new Thread() { 102 public void run() { 103 RedefineRunningMethods_B.infinite(); 104 } 105 }.start(); 106 107 new Thread() { 108 public void run() { 109 RedefineRunningMethods_B.infinite_emcp(); 110 } 111 }.start(); 112 113 RedefineClassHelper.redefineClass(RedefineRunningMethods_B.class, newB); 114 115 System.gc(); 116 117 RedefineRunningMethods_B.infinite(); 118 119 // Start a thread with the second version of infinite_emcp running 120 new Thread() { 121 public void run() { 122 RedefineRunningMethods_B.infinite_emcp(); 123 } 124 }.start(); 125 126 for (int i = 0; i < 20 ; i++) { 127 String s = new String("some garbage"); 128 System.gc(); 129 } 130 131 RedefineClassHelper.redefineClass(RedefineRunningMethods_B.class, evenNewerB); 132 System.gc(); 133 134 for (int i = 0; i < 20 ; i++) { 135 RedefineRunningMethods_B.infinite(); 136 String s = new String("some garbage"); 137 System.gc(); 138 } 139 140 RedefineRunningMethods_B.infinite_emcp(); 141 142 // purge should clean everything up. 143 RedefineRunningMethods_B.stop = true; 144 145 for (int i = 0; i < 20 ; i++) { 146 RedefineRunningMethods_B.infinite(); 147 String s = new String("some garbage"); 148 System.gc(); 149 } 150 } 151 }