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 
17 /**
18  * One line from the loaded-classes file.
19  */
20 class Record {
21 
22     /**
23      * The delimiter character we use, {@code :}, conflicts with some other
24      * names. In that case, manually replace the delimiter with something else.
25      */
26     private static final String[] REPLACE_CLASSES = {
27             "com.google.android.apps.maps:FriendService",
28             "com.google.android.apps.maps\\u003AFriendService",
29             "com.google.android.apps.maps:driveabout",
30             "com.google.android.apps.maps\\u003Adriveabout",
31             "com.google.android.apps.maps:GoogleLocationService",
32             "com.google.android.apps.maps\\u003AGoogleLocationService",
33             "com.google.android.apps.maps:LocationFriendService",
34             "com.google.android.apps.maps\\u003ALocationFriendService",
35             "com.google.android.apps.maps:MapsBackgroundService",
36             "com.google.android.apps.maps\\u003AMapsBackgroundService",
37             "com.google.android.apps.maps:NetworkLocationService",
38             "com.google.android.apps.maps\\u003ANetworkLocationService",
39             "com.android.chrome:sandboxed_process",
40             "com.android.chrome\\u003Asandboxed_process",
41             "com.android.fakeoemfeatures:background",
42             "com.android.fakeoemfeatures\\u003Abackground",
43             "com.android.fakeoemfeatures:core",
44             "com.android.fakeoemfeatures\\u003Acore",
45             "com.android.launcher:wallpaper_chooser",
46             "com.android.launcher\\u003Awallpaper_chooser",
47             "com.android.nfc:handover",
48             "com.android.nfc\\u003Ahandover",
49             "com.google.android.music:main",
50             "com.google.android.music\\u003Amain",
51             "com.google.android.music:ui",
52             "com.google.android.music\\u003Aui",
53             "com.google.android.setupwarlock:broker",
54             "com.google.android.setupwarlock\\u003Abroker",
55             "mobi.mgeek.TunnyBrowser:DolphinNotification",
56             "mobi.mgeek.TunnyBrowser\\u003ADolphinNotification",
57             "com.qo.android.sp.oem:Quickword",
58             "com.qo.android.sp.oem\\u003AQuickword",
59             "android:ui",
60             "android\\u003Aui",
61             "system:ui",
62             "system\\u003Aui",
63     };
64 
65     enum Type {
66         /** Start of initialization. */
67         START_LOAD,
68 
69         /** End of initialization. */
70         END_LOAD,
71 
72         /** Start of initialization. */
73         START_INIT,
74 
75         /** End of initialization. */
76         END_INIT
77     }
78 
79     /** Parent process ID. */
80     final int ppid;
81 
82     /** Process ID. */
83     final int pid;
84 
85     /** Thread ID. */
86     final int tid;
87 
88     /** Process name. */
89     final String processName;
90 
91     /** Class loader pointer. */
92     final int classLoader;
93 
94     /** Type of record. */
95     final Type type;
96 
97     /** Name of loaded class. */
98     final String className;
99 
100     /** Record time (ns). */
101     final long time;
102 
103     /** Source file line# */
104     int sourceLineNumber;
105 
106     /**
107      * Parses a line from the loaded-classes file.
108      */
Record(String line, int lineNum)109     Record(String line, int lineNum) {
110         char typeChar = line.charAt(0);
111         switch (typeChar) {
112             case '>': type = Type.START_LOAD; break;
113             case '<': type = Type.END_LOAD; break;
114             case '+': type = Type.START_INIT; break;
115             case '-': type = Type.END_INIT; break;
116             default: throw new AssertionError("Bad line: " + line);
117         }
118 
119         sourceLineNumber = lineNum;
120 
121         for (int i = 0; i < REPLACE_CLASSES.length; i+= 2) {
122             line = line.replace(REPLACE_CLASSES[i], REPLACE_CLASSES[i+1]);
123         }
124 
125         line = line.substring(1);
126         String[] parts = line.split(":");
127 
128         ppid = Integer.parseInt(parts[0]);
129         pid = Integer.parseInt(parts[1]);
130         tid = Integer.parseInt(parts[2]);
131 
132         processName = decode(parts[3]).intern();
133 
134         classLoader = Integer.parseInt(parts[4]);
135         className = vmTypeToLanguage(decode(parts[5])).intern();
136 
137         time = Long.parseLong(parts[6]);
138     }
139 
140     /**
141      * Decode any escaping that may have been written to the log line.
142      *
143      * Supports unicode-style escaping:  \\uXXXX = character in hex
144      *
145      * @param rawField the field as it was written into the log
146      * @result the same field with any escaped characters replaced
147      */
decode(String rawField)148     String decode(String rawField) {
149         String result = rawField;
150         int offset = result.indexOf("\\u");
151         while (offset >= 0) {
152             String before = result.substring(0, offset);
153             String escaped = result.substring(offset+2, offset+6);
154             String after = result.substring(offset+6);
155 
156             result = String.format("%s%c%s", before, Integer.parseInt(escaped, 16), after);
157 
158             // find another but don't recurse
159             offset = result.indexOf("\\u", offset + 1);
160         }
161         return result;
162     }
163 
164     /**
165      * Converts a VM-style name to a language-style name.
166      */
vmTypeToLanguage(String typeName)167     String vmTypeToLanguage(String typeName) {
168         // if the typename is (null), just return it as-is.  This is probably in dexopt and
169         // will be discarded anyway.  NOTE: This corresponds to the case in dalvik/vm/oo/Class.c
170         // where dvmLinkClass() returns false and we clean up and exit.
171         if ("(null)".equals(typeName)) {
172             return typeName;
173         }
174 
175         if (!typeName.startsWith("L") || !typeName.endsWith(";") ) {
176             throw new AssertionError("Bad name: " + typeName + " in line " + sourceLineNumber);
177         }
178 
179         typeName = typeName.substring(1, typeName.length() - 1);
180         return typeName.replace("/", ".");
181     }
182 }
183