You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
76 lines
2.4 KiB
76 lines
2.4 KiB
/*
|
|
* 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.test;
|
|
|
|
import java.util.concurrent.locks.ReentrantLock;
|
|
|
|
public class TestWatcher {
|
|
// Lock to synchronize access to the static state of this class.
|
|
private static final ReentrantLock lock = new ReentrantLock();
|
|
private static volatile boolean criticalFailure = false;
|
|
private static boolean reportingEnabled = true;
|
|
private static boolean doingReport = false;
|
|
|
|
private static void MonitorEnter() {
|
|
lock.lock();
|
|
}
|
|
|
|
private static void MonitorExit() {
|
|
// Need to do this manually since we need to notify critical failure but would deadlock if
|
|
// waited for the unlock.
|
|
if (!lock.isHeldByCurrentThread()) {
|
|
NotifyCriticalFailure();
|
|
throw new IllegalMonitorStateException("Locking error!");
|
|
} else {
|
|
lock.unlock();
|
|
}
|
|
}
|
|
|
|
// Stops reporting. Must be paired with an EnableReporting call.
|
|
public static void DisableReporting() {
|
|
MonitorEnter();
|
|
reportingEnabled = false;
|
|
}
|
|
|
|
// Stops reporting. Must be paired with a DisableReporting call.
|
|
public static void EnableReporting() {
|
|
reportingEnabled = true;
|
|
MonitorExit();
|
|
}
|
|
|
|
public static void NotifyCriticalFailure() {
|
|
criticalFailure = true;
|
|
}
|
|
|
|
public static void NotifyConstructed(Object o) {
|
|
if (criticalFailure) {
|
|
// Something went very wrong. We are probably trying to report it so don't get in the way.
|
|
return;
|
|
}
|
|
MonitorEnter();
|
|
// We could enter an infinite loop if println allocates (which it does) so we disable
|
|
// reporting while we are doing a report. Since we are synchronized we won't miss any
|
|
// allocations.
|
|
if (reportingEnabled && !doingReport) {
|
|
doingReport = true;
|
|
System.out.println("Object allocated of type '" + o.getClass().getName() + "'");
|
|
doingReport = false;
|
|
}
|
|
MonitorExit();
|
|
}
|
|
}
|