LoadClass.java revision 54b6cfa9a9e5b861a9930af873580d6dc20f773c 
1/*
2 * Copyright (C) 2008 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
17import android.util.Log;
18import android.os.Debug;
19
20/**
21 * Loads a class, runs the garbage collector, and prints showmap output.
22 *
23 * <p>Usage: dalvikvm LoadClass [class name]
24 */
25class LoadClass {
26
27    public static void main(String[] args) {
28        System.loadLibrary("android_runtime");
29
30        if (registerNatives() < 0) {
31            throw new RuntimeException("Error registering natives.");
32        }
33
34        Debug.startAllocCounting();
35
36        if (args.length > 0) {
37            try {
38                Class.forName(args[0]);
39            } catch (ClassNotFoundException e) {
40                Log.w("LoadClass", e);
41                return;
42            }
43        }
44
45        System.gc();
46
47        int allocCount = Debug.getGlobalAllocCount();
48        int allocSize = Debug.getGlobalAllocSize();
49        int freedCount = Debug.getGlobalFreedCount();
50        int freedSize = Debug.getGlobalFreedSize();
51        long nativeHeapSize = Debug.getNativeHeapSize();
52
53        Debug.stopAllocCounting();
54
55        StringBuilder response = new StringBuilder("DECAFBAD");
56
57        int[] pages = new int[6];
58        Debug.MemoryInfo memoryInfo = new Debug.MemoryInfo();
59        Debug.getMemoryInfo(memoryInfo);
60        response.append(',').append(memoryInfo.nativeSharedDirty);
61        response.append(',').append(memoryInfo.dalvikSharedDirty);
62        response.append(',').append(memoryInfo.otherSharedDirty);
63        response.append(',').append(memoryInfo.nativePrivateDirty);
64        response.append(',').append(memoryInfo.dalvikPrivateDirty);
65        response.append(',').append(memoryInfo.otherPrivateDirty);
66
67        response.append(',').append(allocCount);
68        response.append(',').append(allocSize);
69        response.append(',').append(freedCount);
70        response.append(',').append(freedSize);
71        response.append(',').append(nativeHeapSize);
72
73        System.out.println(response.toString());
74    }
75
76    /**
77     * Registers native functions. See AndroidRuntime.cpp.
78     */
79    static native int registerNatives();
80}
81