| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package art; |
| |
| import java.util.concurrent.Semaphore; |
| |
| public class Test1932 { |
| public static final boolean PRINT_FULL_STACK_TRACE = false; |
| public static final boolean INCLUDE_ANDROID_ONLY_TESTS = false; |
| |
| public static interface MonitorHandler { |
| public default void handleMonitorEnter(Thread thd, Object lock) {} |
| public default void handleMonitorEntered(Thread thd, Object lock) {} |
| public default void handleMonitorWait(Thread thd, Object lock, long timeout) {} |
| public default void handleMonitorWaited(Thread thd, Object lock, boolean timed_out) {} |
| } |
| |
| public static volatile MonitorHandler HANDLER = null; |
| |
| public static void run() throws Exception { |
| Monitors.setupMonitorEvents( |
| Test1932.class, |
| Test1932.class.getDeclaredMethod("handleMonitorEnter", Thread.class, Object.class), |
| Test1932.class.getDeclaredMethod("handleMonitorEntered", Thread.class, Object.class), |
| Test1932.class.getDeclaredMethod("handleMonitorWait", |
| Thread.class, Object.class, Long.TYPE), |
| Test1932.class.getDeclaredMethod("handleMonitorWaited", |
| Thread.class, Object.class, Boolean.TYPE), |
| Monitors.NamedLock.class, |
| null); |
| |
| System.out.println("Testing contended locking where lock is released before callback ends."); |
| testLockUncontend(new Monitors.NamedLock("Lock testLockUncontend")); |
| |
| System.out.println("Testing throwing exceptions in monitor_enter"); |
| testLockThrowEnter(new Monitors.NamedLock("Lock testLockThrowEnter")); |
| |
| System.out.println("Testing throwing exceptions in monitor_entered"); |
| testLockThrowEntered(new Monitors.NamedLock("Lock testLockThrowEntered")); |
| |
| System.out.println("Testing throwing exceptions in both monitorEnter & MonitorEntered"); |
| testLockThrowBoth(new Monitors.NamedLock("Lock testLockThrowBoth")); |
| |
| // This exposes a difference between the RI and ART. On the RI this test will cause a |
| // JVMTI_EVENT_MONITOR_WAITED event to be sent even though we threw an exception during the |
| // JVMTI_EVENT_MONITOR_WAIT. See b/65558434. |
| System.out.println("Testing throwing exception in MonitorWait event"); |
| testThrowWait(new Monitors.NamedLock("Lock testThrowWait")); |
| |
| System.out.println("Testing throwing exception in MonitorWait event with illegal aruments"); |
| testThrowIllegalWait(new Monitors.NamedLock("Lock testThrowIllegalWait")); |
| |
| System.out.println("Testing throwing exception in MonitorWaited event"); |
| testThrowWaited(new Monitors.NamedLock("Lock testThrowWaited")); |
| |
| System.out.println("Testing throwing exception in MonitorWaited event caused by timeout"); |
| testThrowWaitedTimeout(new Monitors.NamedLock("Lock testThrowWaitedTimeout")); |
| |
| System.out.println("Testing throwing exception in MonitorWaited event caused by interrupt"); |
| testThrowWaitedInterrupt(new Monitors.NamedLock("Lock testThrowWaitedInterrupt")); |
| |
| System.out.println("Testing ObjectMonitorInfo inside of events"); |
| testMonitorInfoInEvents(new Monitors.NamedLock("Lock testMonitorInfoInEvents")); |
| |
| System.out.println("Testing that the monitor can be stolen during the MonitorWaited event."); |
| testWaitEnterInterleaving(new Monitors.NamedLock("test testWaitEnterInterleaving")); |
| |
| // TODO We keep this here since it works on android but it's not clear it's behavior we want to |
| // support long term or at all. |
| if (INCLUDE_ANDROID_ONLY_TESTS) { |
| System.out.println( |
| "Testing that the monitor can be still held by notifier during the MonitorWaited " + |
| "event. NB This doesn't work on the RI."); |
| testWaitExitInterleaving(new Monitors.NamedLock("test testWaitExitInterleaving")); |
| } |
| |
| System.out.println( |
| "Testing that we can lock and release the monitor in the MonitorWait event"); |
| testWaitMonitorEnter(new Monitors.NamedLock("test testWaitMonitorEnter")); |
| |
| System.out.println( |
| "Testing that we can lock and release the monitor in the MonitorWaited event"); |
| testWaitedMonitorEnter(new Monitors.NamedLock("test testWaitedMonitorEnter")); |
| |
| System.out.println("Testing we can perform recursive lock in MonitorEntered"); |
| testRecursiveMontiorEnteredLock(new Monitors.NamedLock("test testRecursiveMontiorEnteredLock")); |
| |
| System.out.println("Testing the lock state if MonitorEnter throws in a native method"); |
| testNativeLockStateThrowEnter(new Monitors.NamedLock("test testNativeLockStateThrowEnter")); |
| |
| System.out.println("Testing the lock state if MonitorEntered throws in a native method"); |
| testNativeLockStateThrowEntered(new Monitors.NamedLock("test testNativeLockStateThrowEntered")); |
| } |
| |
| public static native void doNativeLockPrint(Monitors.NamedLock lk); |
| public static void printLockState(Monitors.NamedLock lk, Object exception, int res) { |
| System.out.println( |
| "MonitorEnter returned: " + res + "\n" + |
| "Lock state is: " + Monitors.getObjectMonitorUsage(lk)); |
| printExceptions((Throwable)exception); |
| } |
| |
| public static void testNativeLockStateThrowEnter(final Monitors.NamedLock lk) throws Exception { |
| final Monitors.LockController controller1 = new Monitors.LockController(lk); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorEnter(Thread t, Object l) { |
| System.out.println("Unlocking controller1 in MonitorEnter"); |
| try { |
| controller1.DoUnlock(); |
| } catch (Exception e) { |
| throw new Monitors.TestException("Exception unlocking monitor in MonitorEnter " + l, e); |
| } |
| System.out.println("Throwing exception in MonitorEnter"); |
| throw new Monitors.TestException("throwing exception during monitorEnter of " + l); |
| } |
| }; |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| Thread native_thd = new Thread(() -> { |
| try { |
| doNativeLockPrint(lk); |
| } catch (Throwable e) { |
| System.out.println("Unhandled exception: " + e); |
| e.printStackTrace(); |
| } |
| }, "NativeLockStateThrowEnter thread"); |
| native_thd.start(); |
| native_thd.join(); |
| } |
| |
| public static void testNativeLockStateThrowEntered(final Monitors.NamedLock lk) throws Exception { |
| final Monitors.LockController controller1 = new Monitors.LockController(lk); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorEnter(Thread t, Object l) { |
| System.out.println("Unlocking controller1 in MonitorEnter"); |
| try { |
| controller1.DoUnlock(); |
| } catch (Exception e) { |
| throw new Monitors.TestException("Exception unlocking monitor in MonitorEnter " + l, e); |
| } |
| } |
| @Override public void handleMonitorEntered(Thread t, Object l) { |
| System.out.println("Throwing exception in MonitorEntered"); |
| throw new Monitors.TestException("throwing exception during monitorEntered of " + l); |
| } |
| }; |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| Thread native_thd = new Thread(() -> { |
| try { |
| doNativeLockPrint(lk); |
| } catch (Throwable e) { |
| System.out.println("Unhandled exception: " + e); |
| e.printStackTrace(); |
| } |
| }, "NativeLockStateThrowEntered thread"); |
| native_thd.start(); |
| native_thd.join(); |
| } |
| |
| public static void testRecursiveMontiorEnteredLock(final Monitors.NamedLock lk) throws Exception { |
| Monitors.LockController controller1 = new Monitors.LockController(lk); |
| Monitors.LockController controller2 = new Monitors.LockController(lk); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorEntered(Thread thd, Object l) { |
| try { |
| System.out.println("In MonitorEntered usage: " + Monitors.getObjectMonitorUsage(lk)); |
| synchronized (lk) { |
| System.out.println("In MonitorEntered sync: " + Monitors.getObjectMonitorUsage(lk)); |
| } |
| } catch (Exception e) { |
| throw new Monitors.TestException("error while recursive locking!", e); |
| } |
| } |
| }; |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| controller2.DoLock(); |
| controller2.waitForContendedSleep(); |
| controller1.DoUnlock(); |
| controller2.waitForLockToBeHeld(); |
| controller2.DoUnlock(); |
| } |
| |
| public static void testWaitedMonitorEnter(final Monitors.NamedLock lk) throws Exception { |
| final Monitors.LockController controller1 = new Monitors.LockController(lk); |
| final Monitors.LockController controller2 = new Monitors.LockController(lk); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorWaited(Thread thd, Object l, boolean timeout) { |
| try { |
| // make sure that controller2 has acutally unlocked everything, we can be sent earlier |
| // than that on ART. |
| while (controller2.IsLocked()) {} |
| System.out.println("In waited monitor usage: " + Monitors.getObjectMonitorUsage(lk)); |
| synchronized (lk) { |
| System.out.println( |
| "In waited monitor usage sync: " + Monitors.getObjectMonitorUsage(lk)); |
| } |
| } catch (Exception e) { |
| throw new Monitors.TestException("error while doing unlock in other thread!", e); |
| } |
| } |
| }; |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| controller1.DoWait(); |
| controller1.waitForNotifySleep(); |
| try (AutoCloseable suppress = SuppressContention(controller2)) { |
| controller2.DoLock(); |
| controller2.waitForLockToBeHeld(); |
| controller2.DoNotifyAll(); |
| // See comment in testWaitMonitorEnter. |
| } |
| controller2.DoUnlock(); |
| controller1.waitForLockToBeHeld(); |
| controller1.DoUnlock(); |
| } |
| |
| public static void testWaitMonitorEnter(final Monitors.NamedLock lk) throws Exception { |
| final Monitors.LockController controller1 = new Monitors.LockController(lk); |
| final Monitors.LockController controller2 = new Monitors.LockController(lk); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorWait(Thread thd, Object l, long timeout) { |
| try { |
| System.out.println("In wait monitor usage: " + Monitors.getObjectMonitorUsage(lk)); |
| synchronized (lk) { |
| System.out.println("In wait monitor usage sync: " + Monitors.getObjectMonitorUsage(lk)); |
| } |
| } catch (Exception e) { |
| throw new Monitors.TestException("error while doing unlock in other thread!", e); |
| } |
| } |
| }; |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| controller1.DoWait(); |
| controller1.waitForNotifySleep(); |
| // We've seen extra messages about contended locking here. They're OK if e.g. controller1 |
| // wakes up spuriously before the notification, which is allowed. But in the normal case, |
| // we should not see contended locking here. And the extra messages seem rare enough that |
| // we can tolerate the spurious failures to catch more bugs. See b/149308087. |
| try (AutoCloseable suppress = SuppressContention(controller2)) { |
| controller2.DoLock(); |
| controller2.waitForLockToBeHeld(); |
| controller2.DoNotifyAll(); |
| } |
| controller2.DoUnlock(); |
| controller1.waitForLockToBeHeld(); |
| controller1.DoUnlock(); |
| } |
| |
| // NB This test cannot be run on the RI. It deadlocks. Leaving for documentation. |
| public static void testWaitExitInterleaving(Monitors.NamedLock lk) throws Exception { |
| final Monitors.LockController controller1 = new Monitors.LockController(lk); |
| final Monitors.LockController controller2 = new Monitors.LockController(lk); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorWaited(Thread thd, Object l, boolean timeout) { |
| System.out.println("un-locking controller1 in controller2 MonitorWaited event"); |
| try { |
| controller1.DoUnlock(); |
| } catch (Exception e) { |
| throw new Monitors.TestException("error while doing unlock in other thread!", e); |
| } |
| } |
| }; |
| controller2.DoLock(); |
| controller2.waitForLockToBeHeld(); |
| controller2.DoWait(); |
| controller2.waitForNotifySleep(); |
| try (AutoCloseable suppress = SuppressContention(controller1)) { |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| controller1.DoNotifyAll(); |
| // See comment in testWaitMonitorEnter. |
| } |
| controller2.waitForLockToBeHeld(); |
| controller2.DoUnlock(); |
| } |
| |
| public static void testWaitEnterInterleaving(Monitors.NamedLock lk) throws Exception { |
| final Monitors.LockController controller1 = new Monitors.LockController(lk); |
| final Monitors.LockController controller2 = new Monitors.LockController(lk); |
| final Monitors.LockController controller3 = new Monitors.LockController(lk); |
| final Semaphore unlocked_sem = new Semaphore(0); |
| final Semaphore continue_sem = new Semaphore(0); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorWaited(Thread thd, Object l, boolean timeout) { |
| System.out.println("locking controller3 in controller2 MonitorWaited event"); |
| try { |
| unlocked_sem.acquire(); |
| controller3.DoLock(); |
| controller3.waitForLockToBeHeld(); |
| System.out.println( |
| "Controller3 now holds the lock the monitor wait will try to re-acquire"); |
| continue_sem.release(); |
| } catch (Exception e) { |
| throw new Monitors.TestException("error while doing unlock in other thread!", e); |
| } |
| } |
| }; |
| controller2.DoLock(); |
| controller2.waitForLockToBeHeld(); |
| controller2.DoWait(); |
| controller2.waitForNotifySleep(); |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| controller1.DoNotifyAll(); |
| // See comment in testWaitMonitorEnter. |
| controller1.DoUnlock(); |
| // Wait for controller3 to have locked. |
| // We cannot use waitForLockToBeHeld since we could race with the HANDLER waitForLockToBeHeld |
| // function. |
| unlocked_sem.release(); |
| continue_sem.acquire(); |
| controller3.DoUnlock(); |
| controller2.waitForLockToBeHeld(); |
| controller2.DoUnlock(); |
| } |
| |
| public static void testMonitorInfoInEvents(Monitors.NamedLock lk) throws Exception { |
| final Monitors.LockController controller1 = new Monitors.LockController(lk); |
| final Monitors.LockController controller2 = new Monitors.LockController(lk); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorEnter(Thread thd, Object l) { |
| System.out.println("Monitor usage in MonitorEnter: " + Monitors.getObjectMonitorUsage(l)); |
| } |
| @Override public void handleMonitorEntered(Thread thd, Object l) { |
| System.out.println("Monitor usage in MonitorEntered: " + Monitors.getObjectMonitorUsage(l)); |
| } |
| @Override public void handleMonitorWait(Thread thd, Object l, long timeout) { |
| System.out.println("Monitor usage in MonitorWait: " + Monitors.getObjectMonitorUsage(l)); |
| } |
| @Override public void handleMonitorWaited(Thread thd, Object l, boolean timeout) { |
| // make sure that controller1 has acutally unlocked everything, we can be sent earlier than |
| // that on ART. |
| while (controller1.IsLocked()) {} |
| System.out.println("Monitor usage in MonitorWaited: " + Monitors.getObjectMonitorUsage(l)); |
| } |
| }; |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| controller2.DoLock(); |
| controller2.waitForContendedSleep(); |
| controller1.DoUnlock(); |
| controller2.waitForLockToBeHeld(); |
| controller2.DoWait(); |
| controller2.waitForNotifySleep(); |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| controller1.DoNotifyAll(); |
| // See comment in testWaitMonitorEnter. |
| controller1.DoUnlock(); |
| controller2.waitForLockToBeHeld(); |
| controller2.DoUnlock(); |
| } |
| |
| public static void testThrowWaitedInterrupt(Monitors.NamedLock lk) throws Exception { |
| final Monitors.LockController controller1 = new Monitors.LockController(lk); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorWaited(Thread thd, Object l, boolean timeout) { |
| System.out.println("Throwing exception in MonitorWaited"); |
| throw new Monitors.TestException("throwing exception during monitorWaited of " + l); |
| } |
| }; |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| try { |
| controller1.DoWait(); |
| controller1.waitForNotifySleep(); |
| controller1.interruptWorker(); |
| controller1.waitForLockToBeHeld(); |
| controller1.DoUnlock(); |
| System.out.println("No Exception thrown!"); |
| } catch (Monitors.TestException e) { |
| printExceptions(e); |
| System.out.println("lock state is: " + Monitors.getObjectMonitorUsage(lk)); |
| controller1.DoCleanup(); |
| } |
| } |
| |
| public static void testThrowWaitedTimeout(Monitors.NamedLock lk) throws Exception { |
| final Monitors.LockController controller1 = new Monitors.LockController(lk, 5 * 1000); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorWaited(Thread thd, Object l, boolean timeout) { |
| System.out.println("Throwing exception in MonitorWaited"); |
| throw new Monitors.TestException("throwing exception during monitorWaited of " + l); |
| } |
| }; |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| try { |
| controller1.DoTimedWait(); |
| controller1.waitForNotifySleep(); |
| controller1.waitForLockToBeHeld(); |
| controller1.DoUnlock(); |
| System.out.println("No Exception thrown!"); |
| } catch (Monitors.TestException e) { |
| printExceptions(e); |
| System.out.println("lock state is: " + Monitors.getObjectMonitorUsage(lk)); |
| controller1.DoCleanup(); |
| } |
| } |
| |
| public static void testThrowWaited(Monitors.NamedLock lk) throws Exception { |
| final Monitors.LockController controller1 = new Monitors.LockController(lk); |
| final Monitors.LockController controller2 = new Monitors.LockController(lk); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorWaited(Thread thd, Object l, boolean timeout) { |
| System.out.println("Throwing exception in MonitorWaited"); |
| throw new Monitors.TestException("throwing exception during monitorWaited of " + l); |
| } |
| }; |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| controller1.DoWait(); |
| controller1.waitForNotifySleep(); |
| |
| controller2.DoLock(); |
| controller2.waitForLockToBeHeld(); |
| controller2.DoNotifyAll(); |
| // See comment in testWaitMonitorEnter. |
| controller2.DoUnlock(); |
| try { |
| controller1.waitForLockToBeHeld(); |
| controller1.DoUnlock(); |
| System.out.println("No Exception thrown!"); |
| } catch (Monitors.TestException e) { |
| printExceptions(e); |
| System.out.println("lock state is: " + Monitors.getObjectMonitorUsage(lk)); |
| controller1.DoCleanup(); |
| } |
| } |
| |
| public static void testThrowWait(final Monitors.NamedLock lk) throws Exception { |
| final Monitors.LockController controller1 = new Monitors.LockController(lk); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorWait(Thread thd, Object l, long timeout) { |
| System.out.println("Throwing exception in MonitorWait"); |
| throw new Monitors.TestException("throwing exception during MonitorWait of " + l); |
| } |
| }; |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| try { |
| controller1.DoWait(); |
| controller1.waitForNotifySleep(); |
| controller1.waitForLockToBeHeld(); |
| controller1.DoUnlock(); |
| System.out.println("No Exception thrown!"); |
| } catch (Monitors.TestException e) { |
| printExceptions(e); |
| System.out.println("lock state is: " + Monitors.getObjectMonitorUsage(lk)); |
| controller1.DoCleanup(); |
| } |
| } |
| |
| public static void testThrowIllegalWait(final Monitors.NamedLock lk) throws Exception { |
| final Monitors.LockController controller1 = new Monitors.LockController(lk, -100000); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorWait(Thread thd, Object l, long timeout) { |
| System.out.println("Throwing exception in MonitorWait timeout = " + timeout); |
| throw new Monitors.TestException("throwing exception during monitorWait of " + l); |
| } |
| }; |
| try { |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| controller1.DoTimedWait(); |
| controller1.waitForLockToBeHeld(); |
| controller1.DoUnlock(); |
| System.out.println("No Exception thrown!"); |
| } catch (Monitors.TestException e) { |
| printExceptions(e); |
| System.out.println("lock state is: " + Monitors.getObjectMonitorUsage(lk)); |
| controller1.DoCleanup(); |
| } |
| } |
| |
| public static void testLockUncontend(final Monitors.NamedLock lk) throws Exception { |
| final Monitors.LockController controller1 = new Monitors.LockController(lk); |
| final Monitors.LockController controller2 = new Monitors.LockController(lk); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorEnter(Thread thd, Object lock) { |
| if (controller1.IsLocked()) { |
| System.out.println("Releasing " + lk + " during monitorEnter event."); |
| try { |
| controller1.DoUnlock(); |
| } catch (Exception e) { |
| throw new Error("Unable to unlock controller1", e); |
| } |
| } else { |
| throw new Error("controller1 does not seem to hold the lock!"); |
| } |
| } |
| }; |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| // This will call handleMonitorEnter but will release during the callback. |
| controller2.DoLock(); |
| controller2.waitForLockToBeHeld(); |
| if (controller1.IsLocked()) { |
| throw new Error("controller1 still holds the lock somehow!"); |
| } |
| controller2.DoUnlock(); |
| } |
| |
| public static void testLockThrowEnter(Monitors.NamedLock lk) throws Exception { |
| Monitors.LockController controller1 = new Monitors.LockController(lk); |
| Monitors.LockController controller2 = new Monitors.LockController(lk); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorEnter(Thread t, Object l) { |
| System.out.println("Throwing exception in MonitorEnter"); |
| throw new Monitors.TestException("throwing exception during monitorEnter of " + l); |
| } |
| }; |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| try { |
| controller2.DoLock(); |
| controller2.waitForContendedSleep(); |
| controller1.DoUnlock(); |
| controller2.waitForLockToBeHeld(); |
| controller2.DoUnlock(); |
| System.out.println("Did not get an exception!"); |
| } catch (Monitors.TestException e) { |
| printExceptions(e); |
| System.out.println("lock state is: " + Monitors.getObjectMonitorUsage(lk)); |
| controller2.DoCleanup(); |
| } |
| } |
| |
| public static void testLockThrowEntered(Monitors.NamedLock lk) throws Exception { |
| Monitors.LockController controller1 = new Monitors.LockController(lk); |
| Monitors.LockController controller2 = new Monitors.LockController(lk); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorEntered(Thread t, Object l) { |
| System.out.println("Throwing exception in MonitorEntered"); |
| throw new Monitors.TestException("throwing exception during monitorEntered of " + l); |
| } |
| }; |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| try { |
| controller2.DoLock(); |
| controller2.waitForContendedSleep(); |
| controller1.DoUnlock(); |
| controller2.waitForLockToBeHeld(); |
| controller2.DoUnlock(); |
| System.out.println("Did not get an exception!"); |
| } catch (Monitors.TestException e) { |
| printExceptions(e); |
| System.out.println("lock state is: " + Monitors.getObjectMonitorUsage(lk)); |
| controller2.DoCleanup(); |
| } |
| } |
| |
| public static void testLockThrowBoth(Monitors.NamedLock lk) throws Exception { |
| Monitors.LockController controller1 = new Monitors.LockController(lk); |
| Monitors.LockController controller2 = new Monitors.LockController(lk); |
| HANDLER = new MonitorHandler() { |
| @Override public void handleMonitorEnter(Thread t, Object l) { |
| System.out.println("Throwing exception in MonitorEnter"); |
| throw new Monitors.TestException("throwing exception during monitorEnter of " + l); |
| } |
| @Override public void handleMonitorEntered(Thread t, Object l) { |
| System.out.println("Throwing exception in MonitorEntered"); |
| throw new Monitors.TestException("throwing exception during monitorEntered of " + l); |
| } |
| }; |
| controller1.DoLock(); |
| controller1.waitForLockToBeHeld(); |
| try { |
| controller2.DoLock(); |
| controller2.waitForContendedSleep(); |
| controller1.DoUnlock(); |
| controller2.waitForLockToBeHeld(); |
| controller2.DoUnlock(); |
| System.out.println("Did not get an exception!"); |
| } catch (Monitors.TestException e) { |
| printExceptions(e); |
| System.out.println("lock state is: " + Monitors.getObjectMonitorUsage(lk)); |
| controller2.DoCleanup(); |
| } |
| } |
| |
| public static void printExceptions(Throwable t) { |
| System.out.println("Caught exception: " + t); |
| for (Throwable c = t.getCause(); c != null; c = c.getCause()) { |
| System.out.println("\tCaused by: " + |
| (Test1932.class.getPackage().equals(c.getClass().getPackage()) |
| ? c.toString() : c.getClass().toString())); |
| } |
| if (PRINT_FULL_STACK_TRACE) { |
| t.printStackTrace(); |
| } |
| } |
| |
| public static AutoCloseable SuppressContention(Monitors.LockController controller) { |
| if (CONTENTION_SUPPRESSED != null) { |
| throw new IllegalStateException("Only one contention suppression is possible at a time."); |
| } |
| CONTENTION_SUPPRESSED = controller; |
| return () -> { |
| CONTENTION_SUPPRESSED = null; |
| }; |
| } |
| |
| private static Monitors.LockController CONTENTION_SUPPRESSED = null; |
| |
| public static void handleMonitorEnter(Thread thd, Object lock) { |
| if (CONTENTION_SUPPRESSED != null && CONTENTION_SUPPRESSED.IsWorkerThread(thd)) { |
| return; |
| } |
| System.out.println(thd.getName() + " contended-LOCKING " + lock); |
| if (HANDLER != null) { |
| HANDLER.handleMonitorEnter(thd, lock); |
| } |
| } |
| |
| public static void handleMonitorEntered(Thread thd, Object lock) { |
| if (CONTENTION_SUPPRESSED != null && CONTENTION_SUPPRESSED.IsWorkerThread(thd)) { |
| return; |
| } |
| System.out.println(thd.getName() + " LOCKED " + lock); |
| if (HANDLER != null) { |
| HANDLER.handleMonitorEntered(thd, lock); |
| } |
| } |
| public static void handleMonitorWait(Thread thd, Object lock, long timeout) { |
| System.out.println(thd.getName() + " start-monitor-wait " + lock + " timeout: " + timeout); |
| if (HANDLER != null) { |
| HANDLER.handleMonitorWait(thd, lock, timeout); |
| } |
| } |
| |
| public static void handleMonitorWaited(Thread thd, Object lock, boolean timed_out) { |
| System.out.println(thd.getName() + " monitor-waited " + lock + " timed_out: " + timed_out); |
| if (HANDLER != null) { |
| HANDLER.handleMonitorWaited(thd, lock, timed_out); |
| } |
| } |
| } |