80 lines
2.8 KiB
Java
80 lines
2.8 KiB
Java
/*
|
|
* Copyright (C) 2016 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.
|
|
*/
|
|
import java.util.IdentityHashMap;
|
|
import dalvik.system.VMRuntime;
|
|
|
|
public class Main {
|
|
public static void main(String[] args) {
|
|
System.loadLibrary(args[0]);
|
|
int initialSize = monitorListSize();
|
|
IdentityHashMap<Object, Integer> all = new IdentityHashMap();
|
|
for (int i = 0; i < 5000; ++i) {
|
|
Object obj = new Object();
|
|
synchronized(obj) {
|
|
// Should force inflation.
|
|
all.put(obj, obj.hashCode());
|
|
}
|
|
}
|
|
// Since monitor deflation is delayed significantly, we believe that even with an intervening
|
|
// GC, monitors should remain inflated. We allow some slop for unrelated concurrent runtime
|
|
// actions.
|
|
int inflatedSize = monitorListSize();
|
|
if (inflatedSize >= initialSize + 4000) {
|
|
System.out.println("Monitor list grew by at least 4000 monitors");
|
|
} else {
|
|
System.out.println("Monitor list did not grow as expected");
|
|
}
|
|
// Encourage monitor deflation.
|
|
// trim() (Heap::Trim()) deflates only in JANK_IMPERCEPTIBLE state.
|
|
// Some of this mirrors code in ActivityThread.java.
|
|
final int DALVIK_PROCESS_STATE_JANK_PERCEPTIBLE = 0;
|
|
final int DALVIK_PROCESS_STATE_JANK_IMPERCEPTIBLE = 1;
|
|
VMRuntime.getRuntime().updateProcessState(DALVIK_PROCESS_STATE_JANK_IMPERCEPTIBLE);
|
|
System.gc();
|
|
System.runFinalization();
|
|
trim();
|
|
VMRuntime.getRuntime().updateProcessState(DALVIK_PROCESS_STATE_JANK_PERCEPTIBLE);
|
|
int finalSize = monitorListSize();
|
|
if (finalSize > initialSize + 1000) {
|
|
System.out.println("Monitor list failed to shrink properly");
|
|
} else {
|
|
System.out.println("Monitor list shrank correctly");
|
|
}
|
|
int j = 0;
|
|
for (Object obj: all.keySet()) {
|
|
++j;
|
|
if (obj.hashCode() != all.get(obj)) {
|
|
throw new AssertionError("Failed hashcode test!");
|
|
}
|
|
}
|
|
System.out.println("Finished first check");
|
|
for (Object obj: all.keySet()) {
|
|
++j;
|
|
synchronized(obj) {
|
|
if (obj.hashCode() != all.get(obj)) {
|
|
throw new AssertionError("Failed hashcode test!");
|
|
}
|
|
}
|
|
}
|
|
System.out.println("Finished second check");
|
|
System.out.println("Total checks: " + j);
|
|
}
|
|
|
|
private static native void trim();
|
|
|
|
private static native int monitorListSize();
|
|
}
|