1 /* 2 * Copyright (C) 2013 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.*; 18 19 class Main { 20 static Object nativeLock = new Object(); 21 static int nativeBytes = 0; 22 static Object runtime; 23 static Method register_native_allocation; 24 static Method register_native_free; 25 static int maxMem = 64 * 1024 * 1024; 26 27 static class NativeAllocation { 28 private int bytes; 29 NativeAllocation(int bytes)30 NativeAllocation(int bytes) throws Exception { 31 this.bytes = bytes; 32 register_native_allocation.invoke(runtime, bytes); 33 synchronized (nativeLock) { 34 nativeBytes += bytes; 35 if (nativeBytes > maxMem) { 36 throw new OutOfMemoryError(); 37 } 38 } 39 } 40 finalize()41 protected void finalize() throws Exception { 42 synchronized (nativeLock) { 43 nativeBytes -= bytes; 44 } 45 register_native_free.invoke(runtime, bytes); 46 } 47 } 48 main(String[] args)49 public static void main(String[] args) throws Exception { 50 Class<?> vm_runtime = Class.forName("dalvik.system.VMRuntime"); 51 Method get_runtime = vm_runtime.getDeclaredMethod("getRuntime"); 52 runtime = get_runtime.invoke(null); 53 register_native_allocation = vm_runtime.getDeclaredMethod("registerNativeAllocation", Integer.TYPE); 54 register_native_free = vm_runtime.getDeclaredMethod("registerNativeFree", Integer.TYPE); 55 int count = 16; 56 int size = 512 * 0x400; 57 int allocation_count = 256; 58 NativeAllocation[] allocations = new NativeAllocation[count]; 59 for (int i = 0; i < allocation_count; ++i) { 60 allocations[i % count] = new NativeAllocation(size); 61 } 62 System.out.println("Test complete"); 63 } 64 } 65 66