/*
* Copyright (C) 2009 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.
*/
public class Main {
static class ArrayMemEater {
static boolean sawOome;
static void blowup(char[][] holder) {
try {
for (int i = 0; i < holder.length; ++i) {
holder[i] = new char[1024 * 1024];
}
} catch (OutOfMemoryError oome) {
ArrayMemEater.sawOome = true;
}
}
}
static class InstanceMemEater {
static boolean sawOome;
InstanceMemEater next;
double d1, d2, d3, d4, d5, d6, d7, d8; // Bloat this object so we fill the heap faster.
static InstanceMemEater allocate() {
try {
return new InstanceMemEater();
} catch (OutOfMemoryError e) {
InstanceMemEater.sawOome = true;
return null;
}
}
static void confuseCompilerOptimization(InstanceMemEater instance) {
}
}
static boolean triggerArrayOOM() {
ArrayMemEater.blowup(new char[128 * 1024][]);
return ArrayMemEater.sawOome;
}
static boolean triggerInstanceOOM() {
InstanceMemEater memEater = InstanceMemEater.allocate();
InstanceMemEater lastMemEater = memEater;
do {
lastMemEater.next = InstanceMemEater.allocate();
lastMemEater = lastMemEater.next;
} while (lastMemEater != null);
memEater.confuseCompilerOptimization(memEater);
return InstanceMemEater.sawOome;
}
public static void main(String[] args) {
if (triggerArrayOOM()) {
System.out.println("NEW_ARRAY correctly threw OOME");
}
if (triggerInstanceOOM()) {
System.out.println("NEW_INSTANCE correctly threw OOME");
}
}
}