1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 import java.lang.reflect.Method; 18 import java.util.ArrayList; 19 import java.util.List; 20 21 public class Main { 22 main(String[] args)23 public static void main(String[] args) throws Exception { 24 25 int alloc1 = 1; 26 try { 27 List<byte[]> l = new ArrayList<byte[]>(); 28 while (true) { 29 // Allocate a MB at a time 30 l.add(new byte[1048576]); 31 alloc1++; 32 } 33 } catch (OutOfMemoryError e) { 34 } 35 // Expand the heap to the maximum size. 36 // Reflective equivalent of: dalvik.system.VMRuntime.getRuntime().clearGrowthLimit(); 37 Class<?> vm_runtime = Class.forName("dalvik.system.VMRuntime"); 38 Method get_runtime = vm_runtime.getDeclaredMethod("getRuntime"); 39 Object runtime = get_runtime.invoke(null); 40 Method clear_growth_limit = vm_runtime.getDeclaredMethod("clearGrowthLimit"); 41 clear_growth_limit.invoke(runtime); 42 43 int alloc2 = 1; 44 try { 45 List<byte[]> l = new ArrayList<byte[]>(); 46 while (true) { 47 // Allocate a MB at a time 48 l.add(new byte[1048576]); 49 alloc2++; 50 } 51 } catch (OutOfMemoryError e2) { 52 if (alloc1 > alloc2) { 53 System.out.println("ERROR: Allocated less memory after growth" + 54 "limit cleared (" + alloc1 + " MBs > " + alloc2 + " MBs"); 55 System.exit(1); 56 } 57 } 58 System.out.println("Test complete"); 59 } 60 } 61