| /* |
| * 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 char [][] holder; |
| |
| static class ArrayMemEater { |
| static boolean sawOome; |
| |
| static void blowup(char[][] holder) { |
| try { |
| for (int i = 0; i < holder.length; ++i) { |
| holder[i] = new char[1022 * 1024]; |
| } |
| } catch (OutOfMemoryError oome) { |
| ArrayMemEater.sawOome = true; |
| } |
| } |
| } |
| |
| static class InstanceMemEater { |
| static boolean sawOome; |
| static InstanceMemEater hook; |
| |
| 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) { |
| hook = instance; |
| } |
| } |
| |
| static class InstanceFinalizerMemEater { |
| static boolean sawOome; |
| static InstanceFinalizerMemEater hook; |
| |
| InstanceFinalizerMemEater next; |
| |
| static InstanceFinalizerMemEater allocate() { |
| try { |
| return new InstanceFinalizerMemEater(); |
| } catch (OutOfMemoryError e) { |
| InstanceFinalizerMemEater.sawOome = true; |
| return null; |
| } |
| } |
| |
| static void confuseCompilerOptimization(InstanceFinalizerMemEater instance) { |
| hook = instance; |
| } |
| |
| protected void finalize() {} |
| } |
| |
| static boolean triggerArrayOOM(char[][] holder) { |
| ArrayMemEater.blowup(holder); |
| 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); |
| InstanceMemEater.hook = null; |
| return InstanceMemEater.sawOome; |
| } |
| |
| static boolean triggerInstanceFinalizerOOM() { |
| InstanceFinalizerMemEater memEater = InstanceFinalizerMemEater.allocate(); |
| InstanceFinalizerMemEater lastMemEater = memEater; |
| do { |
| lastMemEater.next = InstanceFinalizerMemEater.allocate(); |
| lastMemEater = lastMemEater.next; |
| } while (lastMemEater != null); |
| memEater.confuseCompilerOptimization(memEater); |
| InstanceFinalizerMemEater.hook = null; |
| return InstanceFinalizerMemEater.sawOome; |
| } |
| |
| public static void main(String[] args) { |
| // Keep holder alive to make instance OOM happen faster |
| holder = new char[128 * 1024][]; |
| if (triggerArrayOOM(holder)) { |
| System.out.println("NEW_ARRAY correctly threw OOME"); |
| } |
| |
| if (!triggerInstanceFinalizerOOM()) { |
| System.out.println("NEW_INSTANCE (finalize) did not threw OOME"); |
| } |
| |
| if (triggerInstanceOOM()) { |
| System.out.println("NEW_INSTANCE correctly threw OOME"); |
| } |
| } |
| } |