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