1 /* 2 * Copyright (c) 2007, 2020, 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 * 27 * @summary converted from VM Testbase nsk/jvmti/scenarios/hotswap/HS203/hs203t003. 28 * VM Testbase keywords: [quick, jpda, jvmti, onload_only_caps, noras, redefine, feature_hotswap] 29 * VM Testbase readme: 30 * Description :: 31 * Redefining a class while its field is being accessed, pop currently executing frame 32 * (return back to method call statement) and resume its execution. 33 * The Test creates a Thread (MyThread). During class is being prepared, 34 * a field watch is added to jvmti. The thread is allowed to run (execute). 35 * During field change callbacks, class is being redefined with to (./newclass/MyThread.java) 36 * a different version of class and suspended's thread. The main thread would pop frame 37 * and resume its execution. 38 * The test is expected to pass, if redefine class is effective after resuming thread. 39 * (Hint : A thread `s frame can be poped only if it is suspended, so we need to suspend, 40 * later resume that thread). 41 * 42 * @library /vmTestbase 43 * /test/lib 44 * @build nsk.jvmti.scenarios.hotswap.HS203.hs203t003.hs203t003 45 * 46 * @comment compile newclassXX to bin/newclassXX 47 * @run driver nsk.share.ExtraClassesBuilder 48 * newclass00 49 * 50 * @build ExecDriver 51 * @run main/othervm/native PropertyResolvingWrapper ExecDriver --java 52 * "-agentlib:hs203t003=pathToNewByteCode=./bin -waittime=5 package=nsk samples=100 mode=compiled" 53 * nsk.jvmti.scenarios.hotswap.HS203.hs203t003.hs203t003 54 */ 55 56 package nsk.jvmti.scenarios.hotswap.HS203.hs203t003; 57 58 import nsk.share.jvmti.RedefineAgent; 59 import java.util.concurrent.atomic.AtomicBoolean; 60 61 public class hs203t003 extends RedefineAgent { 62 popThreadFrame(Thread thread)63 public native boolean popThreadFrame(Thread thread); isSuspended(Thread thread)64 public native boolean isSuspended(Thread thread); resumeThread(Thread thread)65 public native boolean resumeThread(Thread thread); 66 67 hs203t003(String[] arg)68 public hs203t003(String[] arg) { 69 super(arg); 70 } 71 main(String[] arg)72 public static void main(String[] arg) { 73 arg = nsk.share.jvmti.JVMTITest.commonInit(arg); 74 75 hs203t003 hsCase = new hs203t003(arg); 76 System.exit(hsCase.runAgent()); 77 } 78 79 agentMethod()80 public boolean agentMethod() { 81 boolean passed = false; 82 MyThread mt = new MyThread(); 83 try { 84 mt.start(); 85 // Check if we can can pop the thread. 86 // We can not do redefine/pop frame on run method. 87 while (!MyThread.resume.get()); 88 // Sleep for some few secs to get redefined. 89 while (!isRedefined()) { 90 if (!agentStatus()) { 91 System.out.println("Failed to redefine class"); 92 return passed; 93 } 94 Thread.sleep(100); 95 } 96 // Wait for the thread to be suspended. 97 while (!isSuspended(mt)) { 98 if (!agentStatus()) { 99 System.out.println("Failed to suspend thread"); 100 return passed; 101 } 102 Thread.sleep(100); 103 } 104 // Pop the frame. 105 if (!popThreadFrame(mt)) { 106 System.out.println("Failed to pop a frame = " 107 + mt.threadState); 108 } 109 // Resume the thread. 110 if(!resumeThread(mt)) { 111 System.out.println("Failed to resume the thread = " 112 + mt.threadState); 113 } 114 // Wait till the other thread completes its execution. 115 mt.join(); 116 System.out.println("Thread state after popping/redefining = " 117 + mt.threadState); 118 } catch(Exception ie) { 119 ie.printStackTrace(); 120 } 121 if ((mt.threadState < 1000) && agentStatus()) { 122 passed = true; 123 } 124 return passed; 125 } 126 127 } 128