| /* |
| * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @bug 5086470 6358247 |
| * @summary SynchronizersLockingThread is used by LockedSynchronizers. |
| * It will create threads that acquire ReentrantLock and also object |
| * monitors. |
| * @author Mandy Chung |
| * |
| * @build ThreadDump Utils |
| */ |
| |
| import java.lang.management.*; |
| import java.util.*; |
| import java.util.concurrent.locks.ReentrantLock; |
| import java.util.concurrent.locks.Condition; |
| |
| public class SynchronizerLockingThread extends Thread { |
| static ReentrantLock lock1 = new ReentrantLock(); |
| static ReentrantLock lock2 = new ReentrantLock(); |
| static ReentrantLock lock3 = new ReentrantLock(); |
| static ReentrantLock lock4 = new ReentrantLock(); |
| static Lock lock5 = new Lock("lock5"); |
| static Lock lock6 = new Lock("lock6"); |
| static Lock lock7 = new Lock("lock7"); |
| static ReentrantLock lock8 = new ReentrantLock(); |
| |
| static SynchronizerLockingThread t1 = new Thread1(); |
| static SynchronizerLockingThread t2 = new Thread2(); |
| static int count = 2; |
| static void startLockingThreads() { |
| t1.setDaemon(true); |
| t2.setDaemon(true); |
| t1.start(); |
| t2.start(); |
| |
| // wait until t1 and t2 waits |
| while (count != 0) { |
| try { |
| Thread.sleep(100); |
| } catch (InterruptedException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| Utils.waitForBlockWaitingState(t1); |
| Utils.waitForBlockWaitingState(t2); |
| } |
| |
| static long[] getThreadIds() { |
| return new long[] {t1.getId(), t2.getId()}; |
| } |
| |
| static void checkLocks(ThreadInfo[] tinfos) throws Exception { |
| int matches = 0; |
| for (ThreadInfo info : tinfos) { |
| if (info.getThreadId() == t1.getId()) { |
| t1.checkLocks(info); |
| matches++; |
| } |
| if (info.getThreadId() == t2.getId()) { |
| t2.checkLocks(info); |
| matches++; |
| } |
| } |
| if (matches != 2) { |
| throw new RuntimeException("MonitorInfo missing"); |
| } |
| } |
| |
| static class Lock { |
| String name; |
| Lock(String name) { |
| this.name = name; |
| } |
| public String toString() { |
| return name; |
| } |
| } |
| |
| final String threadName; |
| Lock waitingLock; |
| int numOwnedMonitors; |
| Map<String, Lock[]> ownedMonitors; |
| Condition waitingSync; |
| int numOwnedSyncs; |
| Map<String, ReentrantLock[]> ownedSyncs; |
| public SynchronizerLockingThread(String name) { |
| this.threadName = name; |
| } |
| |
| protected void setExpectedResult(Lock waitingLock, |
| int numOwnedMonitors, |
| Map<String, Lock[]> ownedMonitors, |
| Condition waitingSync, |
| int numOwnedSyncs, |
| Map<String, ReentrantLock[]> ownedSyncs) { |
| this.waitingLock = waitingLock; |
| this.numOwnedMonitors = numOwnedMonitors; |
| this.ownedMonitors = ownedMonitors; |
| this.waitingSync = waitingSync; |
| this.numOwnedSyncs = numOwnedSyncs; |
| this.ownedSyncs = ownedSyncs; |
| } |
| |
| void checkLocks(ThreadInfo info) throws Exception { |
| checkThreadInfo(info); |
| MonitorInfo[] monitors = info.getLockedMonitors(); |
| if (monitors.length != numOwnedMonitors) { |
| ThreadDump.threadDump(); |
| throw new RuntimeException("Number of locked monitors = " + |
| monitors.length + |
| " not matched. Expected: " + numOwnedMonitors); |
| } |
| // check if each monitor returned in the list is the expected |
| // one |
| for (MonitorInfo m : monitors) { |
| StackTraceElement ste = m.getLockedStackFrame(); |
| int depth = m.getLockedStackDepth(); |
| checkStackFrame(info, ste, depth); |
| checkMonitor(m, ste.getMethodName()); |
| } |
| // check if each expected monitor is included in the returned |
| // list |
| for (Map.Entry<String, Lock[]> e : ownedMonitors.entrySet()) { |
| for (Lock l : e.getValue()) { |
| checkMonitor(e.getKey(), l, monitors); |
| } |
| } |
| |
| // We can only check if the length matches since we have no |
| // way to get the AbstractOwnableSynchronizer in ReentrantLock |
| LockInfo[] syncs = info.getLockedSynchronizers(); |
| if (syncs.length != numOwnedSyncs) { |
| ThreadDump.threadDump(); |
| throw new RuntimeException("Number of locked syncs = " + |
| syncs.length + |
| " not matched. Expected: " + numOwnedSyncs); |
| } |
| } |
| |
| void checkThreadInfo(ThreadInfo info) throws Exception { |
| if (!getName().equals(info.getThreadName())) { |
| throw new RuntimeException("Name: " + info.getThreadName() + |
| " not matched. Expected: " + getName()); |
| } |
| LockInfo l = info.getLockInfo(); |
| if ((waitingLock != null || waitingSync != null) && l == null) { |
| throw new RuntimeException("LockInfo: " + l + |
| " not matched. Expected: non-null"); |
| } |
| if (waitingLock == null && waitingSync == null && l != null) { |
| throw new RuntimeException("LockInfo: " + l + |
| " not matched. Expected: null"); |
| } |
| |
| String waitingLockName; |
| int hcode; |
| if (waitingLock != null) { |
| waitingLockName = waitingLock.getClass().getName(); |
| hcode = System.identityHashCode(waitingLock); |
| } else { |
| waitingLockName = waitingSync.getClass().getName(); |
| hcode = System.identityHashCode(waitingSync); |
| } |
| if (!waitingLockName.equals(l.getClassName())) { |
| throw new RuntimeException("LockInfo : " + l + |
| " class name not matched. Expected: " + waitingLockName); |
| } |
| if (hcode != l.getIdentityHashCode()) { |
| throw new RuntimeException("LockInfo: " + l + |
| " IdentityHashCode not matched. Expected: " + hcode); |
| } |
| |
| String lockName = info.getLockName(); |
| String[] s = lockName.split("@"); |
| if (!waitingLockName.equals(s[0])) { |
| throw new RuntimeException("LockName: " + lockName + |
| " class name not matched. Expected: " + waitingLockName); |
| } |
| int i = Integer.parseInt(s[1], 16); |
| if (hcode != i) { |
| throw new RuntimeException("LockName: " + lockName + |
| " IdentityHashCode not matched. Expected: " + hcode); |
| } |
| } |
| |
| void checkStackFrame(ThreadInfo info, StackTraceElement ste, int depth) { |
| StackTraceElement[] stacktrace = info.getStackTrace(); |
| if (!ste.equals(stacktrace[depth])) { |
| System.out.println("LockedStackFrame:- " + ste); |
| System.out.println("StackTrace at " + depth + " :-" + |
| stacktrace[depth]); |
| throw new RuntimeException("LockedStackFrame does not match " + |
| "stack frame in ThreadInfo.getStackTrace"); |
| } |
| } |
| void checkMonitor(MonitorInfo m, String methodName) { |
| for (Map.Entry<String, Lock[]> e : ownedMonitors.entrySet()) { |
| if (methodName.equals(e.getKey())) { |
| for (Lock l : e.getValue()) { |
| String className = l.getClass().getName(); |
| int hcode = System.identityHashCode(l); |
| if (className.equals(m.getClassName()) && |
| hcode == m.getIdentityHashCode()) { |
| // monitor matched the expected |
| return; |
| } |
| } |
| } |
| } |
| throw new RuntimeException("Monitor not expected" + m); |
| } |
| void checkMonitor(String methodName, Lock l, MonitorInfo[] monitors) { |
| String className = l.getClass().getName(); |
| int hcode = System.identityHashCode(l); |
| for (MonitorInfo m : monitors) { |
| if (className.equals(m.getClassName()) && |
| hcode == m.getIdentityHashCode() && |
| methodName.equals(m.getLockedStackFrame().getMethodName())) { |
| return; |
| } |
| } |
| throw new RuntimeException("Monitor not found in the returned list" + |
| " Method: " + methodName + " Lock: " + l); |
| |
| } |
| |
| static class Thread1 extends SynchronizerLockingThread { |
| public Thread1() { |
| super("t1"); |
| initExpectedResult(); |
| } |
| public void run() { |
| A(); |
| } |
| void A() { |
| lock1.lock(); |
| try { |
| lock2.lock(); |
| try { |
| lock3.lock(); |
| try { |
| B(); |
| } finally { |
| lock3.unlock(); |
| } |
| } finally { |
| lock2.unlock(); |
| } |
| } finally { |
| lock1.unlock(); |
| } |
| } |
| void B() { |
| lock4.lock(); |
| try { |
| synchronized(lock5) { |
| C(); |
| } |
| } finally { |
| lock4.unlock(); |
| } |
| } |
| void C() { |
| synchronized(lock6) { |
| D(); |
| } |
| } |
| void D() { |
| synchronized(lock7) { |
| try { |
| // signal to about to wait |
| count--; |
| lock7.wait(); |
| } catch (InterruptedException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| |
| Map<String, Lock[]> LOCKED_MONITORS; |
| Map<String, ReentrantLock[]> LOCKED_SYNCS; |
| Lock WAITING_LOCK = lock7; |
| int OWNED_MONITORS = 2; |
| int OWNED_SYNCS = 4; |
| void initExpectedResult() { |
| LOCKED_MONITORS = new HashMap<String, Lock[]>(); |
| LOCKED_MONITORS.put("D", new Lock[0]); // no monitored locked |
| LOCKED_MONITORS.put("C", new Lock[] {lock6}); |
| LOCKED_MONITORS.put("B", new Lock[] {lock5}); |
| LOCKED_MONITORS.put("A", new Lock[0]); |
| |
| LOCKED_SYNCS = new HashMap<String, ReentrantLock[]>(); |
| LOCKED_SYNCS.put("D", new ReentrantLock[0]); // no sync locked |
| LOCKED_SYNCS.put("C", new ReentrantLock[0]); // no sync locked |
| LOCKED_SYNCS.put("B", new ReentrantLock[] {lock4}); |
| LOCKED_SYNCS.put("A", new ReentrantLock[] {lock3, lock2, lock1}); |
| this.setExpectedResult(WAITING_LOCK, |
| OWNED_MONITORS, LOCKED_MONITORS, |
| null, |
| OWNED_SYNCS, LOCKED_SYNCS); |
| } |
| |
| } |
| |
| static class Thread2 extends SynchronizerLockingThread { |
| Map<String, Lock[]> LOCKED_MONITORS = new HashMap<String, Lock[]>(); |
| Map<String, ReentrantLock[]> LOCKED_SYNCS = new HashMap<String, ReentrantLock[]>(); |
| Condition c = lock8.newCondition(); |
| Condition WAITING_LOCK = c; |
| int OWNED_MONITORS = 0; |
| int OWNED_SYNCS = 0; |
| public Thread2() { |
| super("t2"); |
| this.setExpectedResult(null, |
| OWNED_MONITORS, LOCKED_MONITORS, |
| WAITING_LOCK, |
| OWNED_SYNCS, LOCKED_SYNCS); |
| } |
| public void run() { |
| lock8.lock(); |
| try { |
| synchronized(lock7) { |
| count--; |
| } |
| c.await(); |
| } catch (InterruptedException e) { |
| throw new RuntimeException(e); |
| } finally { |
| lock8.unlock(); |
| } |
| throw new RuntimeException("should not reach here"); |
| } |
| } |
| |
| } |