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: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.google.android.music:main",
46            "com.google.android.music\\u003Amain",
47            "com.google.android.music:ui",
48            "com.google.android.music\\u003Aui",
49            "com.google.android.setupwarlock:broker",
50            "com.google.android.setupwarlock\\u003Abroker",
51            "android:ui",
52            "android\\u003Aui",
53    };
54
55    enum Type {
56        /** Start of initialization. */
57        START_LOAD,
58
59        /** End of initialization. */
60        END_LOAD,
61
62        /** Start of initialization. */
63        START_INIT,
64
65        /** End of initialization. */
66        END_INIT
67    }
68
69    /** Parent process ID. */
70    final int ppid;
71
72    /** Process ID. */
73    final int pid;
74
75    /** Thread ID. */
76    final int tid;
77
78    /** Process name. */
79    final String processName;
80
81    /** Class loader pointer. */
82    final int classLoader;
83
84    /** Type of record. */
85    final Type type;
86
87    /** Name of loaded class. */
88    final String className;
89
90    /** Record time (ns). */
91    final long time;
92
93    /** Source file line# */
94    int sourceLineNumber;
95
96    /**
97     * Parses a line from the loaded-classes file.
98     */
99    Record(String line, int lineNum) {
100        char typeChar = line.charAt(0);
101        switch (typeChar) {
102            case '>': type = Type.START_LOAD; break;
103            case '<': type = Type.END_LOAD; break;
104            case '+': type = Type.START_INIT; break;
105            case '-': type = Type.END_INIT; break;
106            default: throw new AssertionError("Bad line: " + line);
107        }
108
109        sourceLineNumber = lineNum;
110
111        for (int i = 0; i < REPLACE_CLASSES.length; i+= 2) {
112            line = line.replace(REPLACE_CLASSES[i], REPLACE_CLASSES[i+1]);
113        }
114
115        line = line.substring(1);
116        String[] parts = line.split(":");
117
118        ppid = Integer.parseInt(parts[0]);
119        pid = Integer.parseInt(parts[1]);
120        tid = Integer.parseInt(parts[2]);
121
122        processName = decode(parts[3]).intern();
123
124        classLoader = Integer.parseInt(parts[4]);
125        className = vmTypeToLanguage(decode(parts[5])).intern();
126
127        time = Long.parseLong(parts[6]);
128    }
129
130    /**
131     * Decode any escaping that may have been written to the log line.
132     *
133     * Supports unicode-style escaping:  \\uXXXX = character in hex
134     *
135     * @param rawField the field as it was written into the log
136     * @result the same field with any escaped characters replaced
137     */
138    String decode(String rawField) {
139        String result = rawField;
140        int offset = result.indexOf("\\u");
141        while (offset >= 0) {
142            String before = result.substring(0, offset);
143            String escaped = result.substring(offset+2, offset+6);
144            String after = result.substring(offset+6);
145
146            result = String.format("%s%c%s", before, Integer.parseInt(escaped, 16), after);
147
148            // find another but don't recurse
149            offset = result.indexOf("\\u", offset + 1);
150        }
151        return result;
152    }
153
154    /**
155     * Converts a VM-style name to a language-style name.
156     */
157    String vmTypeToLanguage(String typeName) {
158        // if the typename is (null), just return it as-is.  This is probably in dexopt and
159        // will be discarded anyway.  NOTE: This corresponds to the case in dalvik/vm/oo/Class.c
160        // where dvmLinkClass() returns false and we clean up and exit.
161        if ("(null)".equals(typeName)) {
162            return typeName;
163        }
164
165        if (!typeName.startsWith("L") || !typeName.endsWith(";") ) {
166            throw new AssertionError("Bad name: " + typeName + " in line " + sourceLineNumber);
167        }
168
169        typeName = typeName.substring(1, typeName.length() - 1);
170        return typeName.replace("/", ".");
171    }
172}
173