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