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/timeout=180 -javaagent:redefineagent.jar -Xlog:redefine+class+iklass+add=trace,redefine+class+iklass+purge=trace,class+loader+data=debug,safepoint+cleanup,gc+phases=debug:rt.log RedefineRunningMethods 35 */ 36 37 38 // package access top-level class to avoid problem with RedefineClassHelper 39 // and nested types. 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);//sleep for 10 ms 47 } catch(InterruptedException ie) { 48 } 49 } 50 51 public static void infinite() { 52 while (!stop) { count1++; localSleep(); } 53 } 54 public static void infinite_emcp() { 55 while (!stop) { count2++; localSleep(); } 56 } 57 } 58 59 public class RedefineRunningMethods { 60 61 public static String newB = 62 "class RedefineRunningMethods_B {" + 63 " static int count1 = 0;" + 64 " static int count2 = 0;" + 65 " public static volatile boolean stop = false;" + 66 " static void localSleep() { " + 67 " try{ " + 68 " Thread.currentThread().sleep(10);" + 69 " } catch(InterruptedException ie) { " + 70 " } " + 71 " } " + 72 " public static void infinite() { " + 73 " System.out.println(\"infinite called\");" + 74 " }" + 75 " public static void infinite_emcp() { " + 76 " while (!stop) { count2++; localSleep(); }" + 77 " }" + 78 "}"; 79 80 public static String evenNewerB = 81 "class RedefineRunningMethods_B {" + 82 " static int count1 = 0;" + 83 " static int count2 = 0;" + 84 " public static volatile boolean stop = false;" + 85 " static void localSleep() { " + 86 " try{ " + 87 " Thread.currentThread().sleep(1);" + 88 " } catch(InterruptedException ie) { " + 89 " } " + 90 " } " + 91 " public static void infinite() { }" + 92 " public static void infinite_emcp() { " + 93 " System.out.println(\"infinite_emcp now obsolete called\");" + 94 " }" + 95 "}"; 96 97 98 public static void main(String[] args) throws Exception { 99 100 new Thread() { 101 public void run() { 102 RedefineRunningMethods_B.infinite(); 103 } 104 }.start(); 105 106 new Thread() { 107 public void run() { 108 RedefineRunningMethods_B.infinite_emcp(); 109 } 110 }.start(); 111 112 RedefineClassHelper.redefineClass(RedefineRunningMethods_B.class, newB); 113 114 System.gc(); 115 116 RedefineRunningMethods_B.infinite(); 117 118 // Start a thread with the second version of infinite_emcp running 119 new Thread() { 120 public void run() { 121 RedefineRunningMethods_B.infinite_emcp(); 122 } 123 }.start(); 124 125 for (int i = 0; i < 20 ; i++) { 126 String s = new String("some garbage"); 127 System.gc(); 128 } 129 130 RedefineClassHelper.redefineClass(RedefineRunningMethods_B.class, evenNewerB); 131 System.gc(); 132 133 for (int i = 0; i < 20 ; i++) { 134 RedefineRunningMethods_B.infinite(); 135 String s = new String("some garbage"); 136 System.gc(); 137 } 138 139 RedefineRunningMethods_B.infinite_emcp(); 140 141 // purge should clean everything up. 142 RedefineRunningMethods_B.stop = true; 143 144 for (int i = 0; i < 20 ; i++) { 145 RedefineRunningMethods_B.infinite(); 146 String s = new String("some garbage"); 147 System.gc(); 148 } 149 } 150 }