1/* 2 * Copyright (c) 2015, 2017, 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 * @summary Create a thread which stops in methods a(), a()->b(), a()->b()->c(), 27 * synchronizing on one monitor inside of each method. 28 * After checking that lock info is correct free the lock and 29 * invoke another method. Repeat this action. 30 * @modules java.base/jdk.internal.misc 31 * @library /test/lib 32 * @library ../share 33 * @run main/othervm -XX:+UsePerfData TraveledLockTest 34 */ 35import common.ToolResults; 36import java.util.Iterator; 37import utils.*; 38 39class TraveledLockDebuggee extends Thread { 40 41 static final String THREAD_NAME = "MyThread"; 42 43 TraveledLockDebuggee() { 44 setName(THREAD_NAME); 45 } 46 47 Object monitor = new Object(); 48 49 public void c() { 50 synchronized (monitor) { 51 Utils.sleep(); 52 } 53 } 54 55 public void b() { 56 try { 57 synchronized (monitor) { 58 while (true) { 59 Thread.sleep(Long.MAX_VALUE); 60 } 61 } 62 } catch (InterruptedException e) { 63 c(); 64 } 65 } 66 67 public void a() { 68 try { 69 synchronized (monitor) { 70 while (true) { 71 Thread.sleep(Long.MAX_VALUE); 72 } 73 } 74 } catch (InterruptedException e) { 75 b(); 76 } 77 } 78 79 public void run() { 80 a(); 81 } 82 83} 84 85public class TraveledLockTest { 86 87 public static void main(String[] args) throws Exception { 88 new TraveledLockTest().doTest(); 89 } 90 91 private void doTest() throws Exception { 92 TraveledLockDebuggee debuggee = new TraveledLockDebuggee(); 93 94 // Start in method a() 95 debuggee.start(); 96 97 // Collect output from the jstack tool 98 JstackTool jstackTool = new JstackTool(ProcessHandle.current().pid()); 99 ToolResults results1 = jstackTool.measure(); 100 101 // Go to method b() 102 debuggee.interrupt(); 103 104 // Collect output from the jstack tool 105 ToolResults results2 = jstackTool.measure(); 106 107 // Go to method c() 108 debuggee.interrupt(); 109 110 // Collect output from the jstack tool 111 ToolResults results3 = jstackTool.measure(); 112 113 analyse(results1.getStdoutString(), results2.getStdoutString(), results3.getStdoutString()); 114 } 115 116 // Analyzsing the outputs from the 3 jstack runs 117 public void analyse(String results1, String results2, String results3) { 118 119 String jstackStr1 = results1; 120 String jstackStr2 = results2; 121 String jstackStr3 = results3; 122 123 if (jstackStr1 == null) { 124 throw new RuntimeException("First jstack output is empty"); 125 } 126 if (jstackStr2 == null) { 127 throw new RuntimeException("Second jstack output is empty"); 128 } 129 if (jstackStr3 == null) { 130 throw new RuntimeException("Third jstack output is empty"); 131 } 132 133 Format format = new DefaultFormat(); 134 JStack jstack1 = format.parse(jstackStr1); 135 JStack jstack2 = format.parse(jstackStr2); 136 JStack jstack3 = format.parse(jstackStr3); 137 138 ThreadStack ts1 = jstack1.getThreadStack(TraveledLockDebuggee.THREAD_NAME); 139 ThreadStack ts2 = jstack2.getThreadStack(TraveledLockDebuggee.THREAD_NAME); 140 ThreadStack ts3 = jstack3.getThreadStack(TraveledLockDebuggee.THREAD_NAME); 141 142 if (ts1 == null || ts2 == null || ts3 == null) { 143 throw new RuntimeException( 144 "One of thread stack trace is null in the first jstack output : " 145 + ts1 + ", " + ts2 + ", " + ts3); 146 } 147 148 MonitorInfo monitorInfo1 = null; 149 MonitorInfo monitorInfo2 = null; 150 MonitorInfo monitorInfo3 = null; 151 152 Iterator<MethodInfo> it = ts1.getStack().iterator(); 153 while (it.hasNext()) { 154 MethodInfo mi = it.next(); 155 if (mi.getName().startsWith(TraveledLockDebuggee.class.getName() + ".a")) { 156 monitorInfo1 = haveToHaveOneLock(mi); 157 } 158 } 159 160 it = ts2.getStack().iterator(); 161 while (it.hasNext()) { 162 MethodInfo mi = it.next(); 163 if (mi.getName().startsWith(TraveledLockDebuggee.class.getName() + ".a")) { 164 haveToBeEmpty(mi); 165 } else if (mi.getName().startsWith(TraveledLockDebuggee.class.getName() + ".b")) { 166 monitorInfo2 = haveToHaveOneLock(mi); 167 } 168 } 169 170 it = ts3.getStack().iterator(); 171 while (it.hasNext()) { 172 MethodInfo mi = it.next(); 173 if (mi.getName().startsWith(TraveledLockDebuggee.class.getName() + ".a") 174 || mi.getName().startsWith(TraveledLockDebuggee.class.getName() + ".b")) { 175 haveToBeEmpty(mi); 176 } else if (mi.getName().startsWith(TraveledLockDebuggee.class.getName() + ".c")) { 177 monitorInfo3 = haveToHaveOneLock(mi); 178 } 179 } 180 181 System.out.println("All monitors found - passed"); 182 } 183 184 private MonitorInfo haveToHaveOneLock(MethodInfo mi) { 185 if (mi.getLocks().size() == 1) { 186 System.out.println("Method \"" + mi.getName() 187 + "\" contain 1 lock - correct"); 188 return mi.getLocks().getFirst(); 189 } else { 190 throw new RuntimeException("Lock count (" 191 + mi.getLocks().size() + ") is incorrect in method \"" 192 + mi.getName() + "\""); 193 } 194 } 195 196 private void haveToBeEmpty(MethodInfo mi) { 197 if (mi.getLocks().size() == 0) { 198 System.out.println("Method \"" + mi.getName() 199 + "\" does not lock anything - correct"); 200 } else { 201 throw new RuntimeException( 202 "Unexpected lock found in method \"" + mi.getName() + "\""); 203 } 204 } 205 206} 207