1 /*
2  * Copyright (C) 2015 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 package com.android.server.am;
18 
19 import android.content.ContentProvider;
20 import android.content.ContentValues;
21 import android.database.Cursor;
22 import android.net.Uri;
23 import android.os.Environment;
24 import android.os.ParcelFileDescriptor;
25 
26 import java.io.File;
27 import java.io.FileNotFoundException;
28 
29 public class DumpHeapProvider extends ContentProvider {
30     static final Object sLock = new Object();
31     static File sHeapDumpJavaFile;
32 
getJavaFile()33     static public File getJavaFile() {
34         synchronized (sLock) {
35             return sHeapDumpJavaFile;
36         }
37     }
38 
39     @Override
onCreate()40     public boolean onCreate() {
41         synchronized (sLock) {
42             File dataDir = Environment.getDataDirectory();
43             File systemDir = new File(dataDir, "system");
44             File heapdumpDir = new File(systemDir, "heapdump");
45             heapdumpDir.mkdir();
46             sHeapDumpJavaFile = new File(heapdumpDir, "javaheap.bin");
47         }
48         return true;
49     }
50 
51     @Override
query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder)52     public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
53         return null;
54     }
55 
56     @Override
getType(Uri uri)57     public String getType(Uri uri) {
58         return "application/octet-stream";
59     }
60 
61     @Override
insert(Uri uri, ContentValues values)62     public Uri insert(Uri uri, ContentValues values) {
63         return null;
64     }
65 
66     @Override
delete(Uri uri, String selection, String[] selectionArgs)67     public int delete(Uri uri, String selection, String[] selectionArgs) {
68         return 0;
69     }
70 
71     @Override
update(Uri uri, ContentValues values, String selection, String[] selectionArgs)72     public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
73         return 0;
74     }
75 
76     @Override
openFile(Uri uri, String mode)77     public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
78         synchronized (sLock) {
79             String path = uri.getEncodedPath();
80             final String tag = Uri.decode(path);
81             if (tag.equals("/java")) {
82                 return ParcelFileDescriptor.open(sHeapDumpJavaFile,
83                         ParcelFileDescriptor.MODE_READ_ONLY);
84             } else {
85                 throw new FileNotFoundException("Invalid path for " + uri);
86             }
87         }
88     }
89 }
90