J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * @bug 5086470 6358247 |
| 26 | * @summary LockingThread is used by LockedMonitors test. |
| 27 | * It will create threads that have: |
| 28 | * - a stack frame acquires no monitor |
| 29 | * - a stack frame acquires one or more monitors |
| 30 | * - a stack frame blocks on Object.wait |
| 31 | * and the monitor waiting is not locked. |
| 32 | * @author Mandy Chung |
| 33 | * |
| 34 | * @build Barrier |
| 35 | * @build ThreadDump |
| 36 | */ |
| 37 | |
| 38 | import java.lang.management.*; |
| 39 | import java.util.*; |
| 40 | |
| 41 | public class LockingThread extends Thread { |
| 42 | static Lock lock1 = new Lock("lock1"); |
| 43 | static Lock lock2 = new Lock("lock2"); |
| 44 | static Lock lock3 = new Lock("lock3"); |
| 45 | static Lock lock4 = new Lock("lock4"); |
| 46 | static Lock lock5 = new Lock("lock5"); |
| 47 | static Lock lock6 = new Lock("lock6"); |
| 48 | static Lock lock7 = new Lock("lock7"); |
| 49 | static Lock lock8 = new Lock("lock8"); |
| 50 | |
| 51 | static LockingThread t1 = new Thread1(); |
| 52 | static LockingThread t2 = new Thread2(); |
| 53 | static Barrier barr = new Barrier(2); |
| 54 | static int count = 2; |
| 55 | static void startLockingThreads() { |
| 56 | t1.setDaemon(true); |
| 57 | t2.setDaemon(true); |
| 58 | t1.start(); |
| 59 | t2.start(); |
| 60 | |
| 61 | // wait until t1 waits |
| 62 | while (count != 0) { |
| 63 | try { |
| 64 | Thread.sleep(100); |
| 65 | } catch (InterruptedException e) { |
| 66 | throw new RuntimeException(e); |
| 67 | } |
| 68 | } |
| 69 | } |
| 70 | static long[] getThreadIds() { |
| 71 | return new long[] {t1.getId(), t2.getId()}; |
| 72 | } |
| 73 | |
| 74 | static void checkLockedMonitors(ThreadInfo[] tinfos) |
| 75 | throws Exception { |
| 76 | |
| 77 | int matches = 0; |
| 78 | for (ThreadInfo ti : tinfos) { |
| 79 | if (ti.getThreadId() == t1.getId()) { |
| 80 | t1.checkLockedMonitors(ti); |
| 81 | matches++; |
| 82 | } |
| 83 | if (ti.getThreadId() == t2.getId()) { |
| 84 | t2.checkLockedMonitors(ti); |
| 85 | matches++; |
| 86 | } |
| 87 | } |
| 88 | if (matches != 2) { |
| 89 | throw new RuntimeException("MonitorInfo missing"); |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | static class Lock { |
| 94 | String name; |
| 95 | Lock(String name) { |
| 96 | this.name = name; |
| 97 | } |
| 98 | public String toString() { |
| 99 | return name; |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | final String threadName; |
| 104 | Lock waitingLock; |
| 105 | int numOwnedMonitors; |
| 106 | Map<String, Lock[]> ownedMonitors; |
| 107 | public LockingThread(String name) { |
| 108 | this.threadName = name; |
| 109 | } |
| 110 | |
| 111 | protected void setExpectedResult(Lock waitingLock, |
| 112 | int numOwnedMonitors, |
| 113 | Map<String, Lock[]> ownedMonitors) { |
| 114 | this.waitingLock = waitingLock; |
| 115 | this.numOwnedMonitors = numOwnedMonitors; |
| 116 | this.ownedMonitors = ownedMonitors; |
| 117 | } |
| 118 | |
| 119 | void checkLockedMonitors(ThreadInfo info) |
| 120 | throws Exception { |
| 121 | checkThreadInfo(info); |
| 122 | |
| 123 | MonitorInfo[] monitors = info.getLockedMonitors(); |
| 124 | if (monitors.length != numOwnedMonitors) { |
| 125 | ThreadDump.threadDump(); |
| 126 | throw new RuntimeException("Number of locked monitors = " + |
| 127 | monitors.length + |
| 128 | " not matched. Expected: " + numOwnedMonitors); |
| 129 | } |
| 130 | // check if each monitor returned in the list is the expected |
| 131 | // one |
| 132 | for (MonitorInfo m : monitors) { |
| 133 | StackTraceElement ste = m.getLockedStackFrame(); |
| 134 | int depth = m.getLockedStackDepth(); |
| 135 | checkStackFrame(info, ste, depth); |
| 136 | checkMonitor(m, ste.getMethodName()); |
| 137 | } |
| 138 | // check if each expected monitor is included in the returned |
| 139 | // list |
| 140 | for (Map.Entry<String, Lock[]> e : ownedMonitors.entrySet()) { |
| 141 | for (Lock l : e.getValue()) { |
| 142 | checkMonitor(e.getKey(), l, monitors); |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | if (info.getLockedSynchronizers().length != 0) { |
| 147 | ThreadDump.threadDump(); |
| 148 | throw new RuntimeException("Number of locked synchronizers = " + |
| 149 | info.getLockedSynchronizers().length + |
| 150 | " not matched. Expected: 0."); |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | void checkThreadInfo(ThreadInfo info) throws Exception { |
| 155 | if (!getName().equals(info.getThreadName())) { |
| 156 | throw new RuntimeException("Name: " + info.getThreadName() + |
| 157 | " not matched. Expected: " + getName()); |
| 158 | } |
| 159 | LockInfo l = info.getLockInfo(); |
| 160 | if ((waitingLock == null && l != null) || |
| 161 | (waitingLock != null && l == null)) { |
| 162 | throw new RuntimeException("LockInfo: " + l + |
| 163 | " not matched. Expected: " + waitingLock); |
| 164 | } |
| 165 | |
| 166 | String waitingLockName = waitingLock.getClass().getName(); |
| 167 | int hcode = System.identityHashCode(waitingLock); |
| 168 | if (!waitingLockName.equals(l.getClassName())) { |
| 169 | throw new RuntimeException("LockInfo : " + l + |
| 170 | " class name not matched. Expected: " + waitingLockName); |
| 171 | } |
| 172 | if (hcode != l.getIdentityHashCode()) { |
| 173 | throw new RuntimeException("LockInfo: " + l + |
| 174 | " IdentityHashCode not matched. Expected: " + hcode); |
| 175 | } |
| 176 | |
| 177 | String lockName = info.getLockName(); |
| 178 | String[] s = lockName.split("@"); |
| 179 | if (!waitingLockName.equals(s[0])) { |
| 180 | throw new RuntimeException("LockName: " + lockName + |
| 181 | " class name not matched. Expected: " + waitingLockName); |
| 182 | } |
| 183 | int i = Integer.parseInt(s[1], 16); |
| 184 | if (hcode != i) { |
| 185 | throw new RuntimeException("LockName: " + lockName + |
| 186 | " IdentityHashCode not matched. Expected: " + hcode); |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | void checkStackFrame(ThreadInfo info, StackTraceElement ste, int depth) { |
| 191 | StackTraceElement[] stacktrace = info.getStackTrace(); |
| 192 | if (!ste.equals(stacktrace[depth])) { |
| 193 | System.out.println("LockedStackFrame:- " + ste); |
| 194 | System.out.println("StackTrace at " + depth + " :-" + |
| 195 | stacktrace[depth]); |
| 196 | throw new RuntimeException("LockedStackFrame does not match " + |
| 197 | "stack frame in ThreadInfo.getStackTrace"); |
| 198 | } |
| 199 | } |
| 200 | void checkMonitor(MonitorInfo m, String methodName) { |
| 201 | for (Map.Entry<String, Lock[]> e : ownedMonitors.entrySet()) { |
| 202 | if (methodName.equals(e.getKey())) { |
| 203 | for (Lock l : e.getValue()) { |
| 204 | String className = l.getClass().getName(); |
| 205 | int hcode = System.identityHashCode(l); |
| 206 | if (className.equals(m.getClassName()) && |
| 207 | hcode == m.getIdentityHashCode()) { |
| 208 | // monitor matched the expected |
| 209 | return; |
| 210 | } |
| 211 | } |
| 212 | } |
| 213 | } |
| 214 | throw new RuntimeException("Monitor not expected" + m); |
| 215 | } |
| 216 | void checkMonitor(String methodName, Lock l, MonitorInfo[] monitors) { |
| 217 | String className = l.getClass().getName(); |
| 218 | int hcode = System.identityHashCode(l); |
| 219 | for (MonitorInfo m : monitors) { |
| 220 | if (className.equals(m.getClassName()) && |
| 221 | hcode == m.getIdentityHashCode() && |
| 222 | methodName.equals(m.getLockedStackFrame().getMethodName())) { |
| 223 | return; |
| 224 | } |
| 225 | } |
| 226 | throw new RuntimeException("Monitor not found in the returned list" + |
| 227 | " Method: " + methodName + " Lock: " + l); |
| 228 | |
| 229 | } |
| 230 | |
| 231 | static class Thread1 extends LockingThread { |
| 232 | public Thread1() { |
| 233 | super("t1"); |
| 234 | initExpectedResult(); |
| 235 | } |
| 236 | public void run() { |
| 237 | A(); |
| 238 | } |
| 239 | void A() { |
| 240 | synchronized(lock1) { |
| 241 | synchronized(lock2) { |
| 242 | synchronized(lock3) { |
| 243 | B(); |
| 244 | } |
| 245 | } |
| 246 | } |
| 247 | } |
| 248 | void B() { |
| 249 | synchronized(lock4) { |
| 250 | synchronized(lock5) { |
| 251 | C(); |
| 252 | } |
| 253 | } |
| 254 | } |
| 255 | void C() { |
| 256 | synchronized(lock6) { |
| 257 | D(); |
| 258 | } |
| 259 | } |
| 260 | void D() { |
| 261 | synchronized(lock7) { |
| 262 | try { |
| 263 | // signal to about to wait |
| 264 | count--; |
| 265 | lock7.wait(); |
| 266 | } catch (InterruptedException e) { |
| 267 | throw new RuntimeException(e); |
| 268 | } |
| 269 | } |
| 270 | } |
| 271 | |
| 272 | Map<String, Lock[]> LOCKED_MONITORS; |
| 273 | Lock WAITING_LOCK = lock7; |
| 274 | int OWNED_MONITORS = 6; |
| 275 | void initExpectedResult() { |
| 276 | LOCKED_MONITORS = new HashMap<String, Lock[]>(); |
| 277 | LOCKED_MONITORS.put("D", new Lock[0]); // no monitored locked |
| 278 | LOCKED_MONITORS.put("C", new Lock[] {lock6}); |
| 279 | LOCKED_MONITORS.put("B", new Lock[] {lock5, lock4}); |
| 280 | LOCKED_MONITORS.put("A", new Lock[] {lock3, lock2, lock1}); |
| 281 | this.setExpectedResult(WAITING_LOCK, OWNED_MONITORS, LOCKED_MONITORS); |
| 282 | } |
| 283 | |
| 284 | } |
| 285 | |
| 286 | static class Thread2 extends LockingThread { |
| 287 | Map<String, Lock[]> LOCKED_MONITORS = new HashMap<String, Lock[]>(); |
| 288 | Lock WAITING_LOCK = lock8; |
| 289 | int OWNED_MONITORS = 0; |
| 290 | public Thread2() { |
| 291 | super("t2"); |
| 292 | this.setExpectedResult(WAITING_LOCK, OWNED_MONITORS, LOCKED_MONITORS); |
| 293 | } |
| 294 | public void run() { |
| 295 | synchronized(lock8) { |
| 296 | try { |
| 297 | synchronized(lock7) { |
| 298 | count--; |
| 299 | } |
| 300 | lock8.wait(); |
| 301 | } catch (InterruptedException e) { |
| 302 | throw new RuntimeException(e); |
| 303 | } |
| 304 | } |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | } |