1 /* |
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2 * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 |
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27 /* |
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28 * The Original Code is HAT. The Initial Developer of the |
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29 * Original Code is Bill Foote, with contributions from others |
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30 * at JavaSoft/Sun. |
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31 */ |
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32 |
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33 package com.sun.tools.hat.internal.parser; |
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34 |
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35 import java.io.*; |
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36 import java.util.Date; |
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37 import java.util.Hashtable; |
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38 import com.sun.tools.hat.internal.model.ArrayTypeCodes; |
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39 import com.sun.tools.hat.internal.model.*; |
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40 |
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41 /** |
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42 * Object that's used to read a hprof file. |
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43 * |
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44 * @author Bill Foote |
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45 */ |
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46 |
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47 public class HprofReader extends Reader /* imports */ implements ArrayTypeCodes { |
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48 |
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49 final static int MAGIC_NUMBER = 0x4a415641; |
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50 // That's "JAVA", the first part of "JAVA PROFILE ..." |
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51 private final static String[] VERSIONS = { |
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52 " PROFILE 1.0\0", |
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53 " PROFILE 1.0.1\0", |
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54 " PROFILE 1.0.2\0", |
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55 }; |
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56 |
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57 private final static int VERSION_JDK12BETA3 = 0; |
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58 private final static int VERSION_JDK12BETA4 = 1; |
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59 private final static int VERSION_JDK6 = 2; |
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60 // These version numbers are indices into VERSIONS. The instance data |
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61 // member version is set to one of these, and it drives decisions when |
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62 // reading the file. |
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63 // |
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64 // Version 1.0.1 added HPROF_GC_PRIM_ARRAY_DUMP, which requires no |
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65 // version-sensitive parsing. |
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66 // |
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67 // Version 1.0.1 changed the type of a constant pool entry from a signature |
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68 // to a typecode. |
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69 // |
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70 // Version 1.0.2 added HPROF_HEAP_DUMP_SEGMENT and HPROF_HEAP_DUMP_END |
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71 // to allow a large heap to be dumped as a sequence of heap dump segments. |
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72 // |
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73 // The HPROF agent in J2SE 1.2 through to 5.0 generate a version 1.0.1 |
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74 // file. In Java SE 6.0 the version is either 1.0.1 or 1.0.2 depending on |
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75 // the size of the heap (normally it will be 1.0.1 but for multi-GB |
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76 // heaps the heap dump will not fit in a HPROF_HEAP_DUMP record so the |
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77 // dump is generated as version 1.0.2). |
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78 |
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79 // |
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80 // Record types: |
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81 // |
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82 static final int HPROF_UTF8 = 0x01; |
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83 static final int HPROF_LOAD_CLASS = 0x02; |
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84 static final int HPROF_UNLOAD_CLASS = 0x03; |
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85 static final int HPROF_FRAME = 0x04; |
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86 static final int HPROF_TRACE = 0x05; |
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87 static final int HPROF_ALLOC_SITES = 0x06; |
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88 static final int HPROF_HEAP_SUMMARY = 0x07; |
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89 |
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90 static final int HPROF_START_THREAD = 0x0a; |
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91 static final int HPROF_END_THREAD = 0x0b; |
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92 |
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93 static final int HPROF_HEAP_DUMP = 0x0c; |
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94 |
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95 static final int HPROF_CPU_SAMPLES = 0x0d; |
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96 static final int HPROF_CONTROL_SETTINGS = 0x0e; |
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97 static final int HPROF_LOCKSTATS_WAIT_TIME = 0x10; |
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98 static final int HPROF_LOCKSTATS_HOLD_TIME = 0x11; |
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99 |
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100 static final int HPROF_GC_ROOT_UNKNOWN = 0xff; |
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101 static final int HPROF_GC_ROOT_JNI_GLOBAL = 0x01; |
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102 static final int HPROF_GC_ROOT_JNI_LOCAL = 0x02; |
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103 static final int HPROF_GC_ROOT_JAVA_FRAME = 0x03; |
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104 static final int HPROF_GC_ROOT_NATIVE_STACK = 0x04; |
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105 static final int HPROF_GC_ROOT_STICKY_CLASS = 0x05; |
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106 static final int HPROF_GC_ROOT_THREAD_BLOCK = 0x06; |
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107 static final int HPROF_GC_ROOT_MONITOR_USED = 0x07; |
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108 static final int HPROF_GC_ROOT_THREAD_OBJ = 0x08; |
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109 |
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110 static final int HPROF_GC_CLASS_DUMP = 0x20; |
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111 static final int HPROF_GC_INSTANCE_DUMP = 0x21; |
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112 static final int HPROF_GC_OBJ_ARRAY_DUMP = 0x22; |
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113 static final int HPROF_GC_PRIM_ARRAY_DUMP = 0x23; |
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114 |
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115 static final int HPROF_HEAP_DUMP_SEGMENT = 0x1c; |
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116 static final int HPROF_HEAP_DUMP_END = 0x2c; |
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117 |
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118 private final static int T_CLASS = 2; |
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119 |
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120 private int version; // The version of .hprof being read |
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121 |
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122 private int debugLevel; |
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123 private long currPos; // Current position in the file |
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124 |
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125 private int dumpsToSkip; |
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126 private boolean callStack; // If true, read the call stack of objects |
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127 |
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128 private int identifierSize; // Size, in bytes, of identifiers. |
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129 private Hashtable<Long, String> names; |
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130 |
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131 // Hashtable<Integer, ThreadObject>, used to map the thread sequence number |
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132 // (aka "serial number") to the thread object ID for |
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133 // HPROF_GC_ROOT_THREAD_OBJ. ThreadObject is a trivial inner class, |
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134 // at the end of this file. |
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135 private Hashtable<Integer, ThreadObject> threadObjects; |
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136 |
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137 // Hashtable<Long, String>, maps class object ID to class name |
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138 // (with / converted to .) |
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139 private Hashtable<Long, String> classNameFromObjectID; |
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140 |
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141 // Hashtable<Integer, Integer>, maps class serial # to class object ID |
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142 private Hashtable<Integer, String> classNameFromSerialNo; |
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143 |
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144 // Hashtable<Long, StackFrame> maps stack frame ID to StackFrame. |
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145 // Null if we're not tracking them. |
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146 private Hashtable<Long, StackFrame> stackFrames; |
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147 |
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148 // Hashtable<Integer, StackTrace> maps stack frame ID to StackTrace |
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149 // Null if we're not tracking them. |
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150 private Hashtable<Integer, StackTrace> stackTraces; |
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151 |
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152 private Snapshot snapshot; |
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153 |
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154 public HprofReader(String fileName, PositionDataInputStream in, |
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155 int dumpNumber, boolean callStack, int debugLevel) |
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156 throws IOException { |
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157 super(in); |
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158 RandomAccessFile file = new RandomAccessFile(fileName, "r"); |
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159 this.snapshot = new Snapshot(MappedReadBuffer.create(file)); |
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160 this.dumpsToSkip = dumpNumber - 1; |
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161 this.callStack = callStack; |
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162 this.debugLevel = debugLevel; |
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163 names = new Hashtable<Long, String>(); |
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164 threadObjects = new Hashtable<Integer, ThreadObject>(43); |
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165 classNameFromObjectID = new Hashtable<Long, String>(); |
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166 if (callStack) { |
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167 stackFrames = new Hashtable<Long, StackFrame>(43); |
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168 stackTraces = new Hashtable<Integer, StackTrace>(43); |
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169 classNameFromSerialNo = new Hashtable<Integer, String>(); |
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170 } |
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171 } |
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172 |
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173 public Snapshot read() throws IOException { |
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174 currPos = 4; // 4 because of the magic number |
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175 version = readVersionHeader(); |
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176 identifierSize = in.readInt(); |
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177 snapshot.setIdentifierSize(identifierSize); |
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178 if (version >= VERSION_JDK12BETA4) { |
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179 snapshot.setNewStyleArrayClass(true); |
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180 } else { |
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181 snapshot.setNewStyleArrayClass(false); |
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182 } |
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183 |
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184 currPos += 4; |
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185 if (identifierSize != 4 && identifierSize != 8) { |
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186 throw new IOException("I'm sorry, but I can't deal with an identifier size of " + identifierSize + ". I can only deal with 4 or 8."); |
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187 } |
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188 System.out.println("Dump file created " + (new Date(in.readLong()))); |
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189 currPos += 8; |
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190 |
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191 for (;;) { |
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192 int type; |
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193 try { |
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194 type = in.readUnsignedByte(); |
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195 } catch (EOFException ignored) { |
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196 break; |
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197 } |
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198 in.readInt(); // Timestamp of this record |
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199 // Length of record: readInt() will return negative value for record |
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200 // length >2GB. so store 32bit value in long to keep it unsigned. |
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201 long length = in.readInt() & 0xffffffffL; |
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202 if (debugLevel > 0) { |
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203 System.out.println("Read record type " + type |
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204 + ", length " + length |
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205 + " at position " + toHex(currPos)); |
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206 } |
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207 if (length < 0) { |
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208 throw new IOException("Bad record length of " + length |
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209 + " at byte " + toHex(currPos+5) |
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210 + " of file."); |
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211 } |
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212 currPos += 9 + length; |
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213 switch (type) { |
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214 case HPROF_UTF8: { |
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215 long id = readID(); |
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216 byte[] chars = new byte[(int)length - identifierSize]; |
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217 in.readFully(chars); |
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218 names.put(id, new String(chars)); |
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219 break; |
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220 } |
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221 case HPROF_LOAD_CLASS: { |
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222 int serialNo = in.readInt(); // Not used |
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223 long classID = readID(); |
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224 int stackTraceSerialNo = in.readInt(); |
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225 long classNameID = readID(); |
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226 Long classIdI = classID; |
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227 String nm = getNameFromID(classNameID).replace('/', '.'); |
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228 classNameFromObjectID.put(classIdI, nm); |
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229 if (classNameFromSerialNo != null) { |
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230 classNameFromSerialNo.put(serialNo, nm); |
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231 } |
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232 break; |
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233 } |
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234 |
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235 case HPROF_HEAP_DUMP: { |
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236 if (dumpsToSkip <= 0) { |
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237 try { |
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238 readHeapDump(length, currPos); |
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239 } catch (EOFException exp) { |
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240 handleEOF(exp, snapshot); |
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241 } |
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242 if (debugLevel > 0) { |
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243 System.out.println(" Finished processing instances in heap dump."); |
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244 } |
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245 return snapshot; |
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246 } else { |
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247 dumpsToSkip--; |
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248 skipBytes(length); |
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249 } |
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250 break; |
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251 } |
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252 |
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253 case HPROF_HEAP_DUMP_END: { |
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254 if (version >= VERSION_JDK6) { |
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255 if (dumpsToSkip <= 0) { |
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256 skipBytes(length); // should be no-op |
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257 return snapshot; |
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258 } else { |
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259 // skip this dump (of the end record for a sequence of dump segments) |
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260 dumpsToSkip--; |
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261 } |
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262 } else { |
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263 // HPROF_HEAP_DUMP_END only recognized in >= 1.0.2 |
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264 warn("Ignoring unrecognized record type " + type); |
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265 } |
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266 skipBytes(length); // should be no-op |
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267 break; |
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268 } |
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269 |
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270 case HPROF_HEAP_DUMP_SEGMENT: { |
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271 if (version >= VERSION_JDK6) { |
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272 if (dumpsToSkip <= 0) { |
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273 try { |
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274 // read the dump segment |
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275 readHeapDump(length, currPos); |
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276 } catch (EOFException exp) { |
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277 handleEOF(exp, snapshot); |
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278 } |
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279 } else { |
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280 // all segments comprising the heap dump will be skipped |
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281 skipBytes(length); |
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282 } |
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283 } else { |
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284 // HPROF_HEAP_DUMP_SEGMENT only recognized in >= 1.0.2 |
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285 warn("Ignoring unrecognized record type " + type); |
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286 skipBytes(length); |
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287 } |
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288 break; |
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289 } |
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290 |
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291 case HPROF_FRAME: { |
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292 if (stackFrames == null) { |
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293 skipBytes(length); |
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294 } else { |
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295 long id = readID(); |
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296 String methodName = getNameFromID(readID()); |
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297 String methodSig = getNameFromID(readID()); |
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298 String sourceFile = getNameFromID(readID()); |
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299 int classSer = in.readInt(); |
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300 String className = classNameFromSerialNo.get(classSer); |
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301 int lineNumber = in.readInt(); |
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302 if (lineNumber < StackFrame.LINE_NUMBER_NATIVE) { |
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303 warn("Weird stack frame line number: " + lineNumber); |
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304 lineNumber = StackFrame.LINE_NUMBER_UNKNOWN; |
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305 } |
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306 stackFrames.put(id, |
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307 new StackFrame(methodName, methodSig, |
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308 className, sourceFile, |
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309 lineNumber)); |
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310 } |
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311 break; |
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312 } |
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313 case HPROF_TRACE: { |
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314 if (stackTraces == null) { |
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315 skipBytes(length); |
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316 } else { |
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317 int serialNo = in.readInt(); |
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318 int threadSeq = in.readInt(); // Not used |
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319 StackFrame[] frames = new StackFrame[in.readInt()]; |
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320 for (int i = 0; i < frames.length; i++) { |
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321 long fid = readID(); |
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322 frames[i] = stackFrames.get(fid); |
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323 if (frames[i] == null) { |
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324 throw new IOException("Stack frame " + toHex(fid) + " not found"); |
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325 } |
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326 } |
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327 stackTraces.put(serialNo, |
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328 new StackTrace(frames)); |
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329 } |
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330 break; |
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331 } |
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332 case HPROF_UNLOAD_CLASS: |
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333 case HPROF_ALLOC_SITES: |
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334 case HPROF_START_THREAD: |
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335 case HPROF_END_THREAD: |
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336 case HPROF_HEAP_SUMMARY: |
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337 case HPROF_CPU_SAMPLES: |
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338 case HPROF_CONTROL_SETTINGS: |
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339 case HPROF_LOCKSTATS_WAIT_TIME: |
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340 case HPROF_LOCKSTATS_HOLD_TIME: |
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341 { |
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342 // Ignore these record types |
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343 skipBytes(length); |
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344 break; |
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345 } |
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346 default: { |
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347 skipBytes(length); |
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348 warn("Ignoring unrecognized record type " + type); |
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349 } |
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350 } |
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351 } |
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352 |
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353 return snapshot; |
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354 } |
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355 |
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356 private void skipBytes(long length) throws IOException { |
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357 in.skipBytes((int)length); |
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358 } |
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359 |
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360 private int readVersionHeader() throws IOException { |
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361 int candidatesLeft = VERSIONS.length; |
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362 boolean[] matched = new boolean[VERSIONS.length]; |
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363 for (int i = 0; i < candidatesLeft; i++) { |
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364 matched[i] = true; |
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365 } |
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366 |
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367 int pos = 0; |
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368 while (candidatesLeft > 0) { |
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369 char c = (char) in.readByte(); |
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370 currPos++; |
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371 for (int i = 0; i < VERSIONS.length; i++) { |
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372 if (matched[i]) { |
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373 if (c != VERSIONS[i].charAt(pos)) { // Not matched |
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374 matched[i] = false; |
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375 --candidatesLeft; |
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376 } else if (pos == VERSIONS[i].length() - 1) { // Full match |
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377 return i; |
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378 } |
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379 } |
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380 } |
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381 ++pos; |
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382 } |
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383 throw new IOException("Version string not recognized at byte " + (pos+3)); |
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384 } |
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385 |
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386 private void readHeapDump(long bytesLeft, long posAtEnd) throws IOException { |
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387 while (bytesLeft > 0) { |
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388 int type = in.readUnsignedByte(); |
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389 if (debugLevel > 0) { |
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390 System.out.println(" Read heap sub-record type " + type |
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391 + " at position " |
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392 + toHex(posAtEnd - bytesLeft)); |
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393 } |
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394 bytesLeft--; |
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395 switch(type) { |
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396 case HPROF_GC_ROOT_UNKNOWN: { |
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397 long id = readID(); |
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398 bytesLeft -= identifierSize; |
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399 snapshot.addRoot(new Root(id, 0, Root.UNKNOWN, "")); |
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400 break; |
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401 } |
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402 case HPROF_GC_ROOT_THREAD_OBJ: { |
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403 long id = readID(); |
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404 int threadSeq = in.readInt(); |
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405 int stackSeq = in.readInt(); |
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406 bytesLeft -= identifierSize + 8; |
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407 threadObjects.put(threadSeq, |
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408 new ThreadObject(id, stackSeq)); |
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409 break; |
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410 } |
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411 case HPROF_GC_ROOT_JNI_GLOBAL: { |
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412 long id = readID(); |
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413 long globalRefId = readID(); // Ignored, for now |
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414 bytesLeft -= 2*identifierSize; |
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415 snapshot.addRoot(new Root(id, 0, Root.NATIVE_STATIC, "")); |
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416 break; |
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417 } |
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418 case HPROF_GC_ROOT_JNI_LOCAL: { |
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419 long id = readID(); |
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420 int threadSeq = in.readInt(); |
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421 int depth = in.readInt(); |
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422 bytesLeft -= identifierSize + 8; |
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423 ThreadObject to = getThreadObjectFromSequence(threadSeq); |
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424 StackTrace st = getStackTraceFromSerial(to.stackSeq); |
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425 if (st != null) { |
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426 st = st.traceForDepth(depth+1); |
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427 } |
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428 snapshot.addRoot(new Root(id, to.threadId, |
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429 Root.NATIVE_LOCAL, "", st)); |
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430 break; |
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431 } |
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432 case HPROF_GC_ROOT_JAVA_FRAME: { |
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433 long id = readID(); |
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434 int threadSeq = in.readInt(); |
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435 int depth = in.readInt(); |
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436 bytesLeft -= identifierSize + 8; |
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437 ThreadObject to = getThreadObjectFromSequence(threadSeq); |
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438 StackTrace st = getStackTraceFromSerial(to.stackSeq); |
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439 if (st != null) { |
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440 st = st.traceForDepth(depth+1); |
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441 } |
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442 snapshot.addRoot(new Root(id, to.threadId, |
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443 Root.JAVA_LOCAL, "", st)); |
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444 break; |
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445 } |
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446 case HPROF_GC_ROOT_NATIVE_STACK: { |
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447 long id = readID(); |
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448 int threadSeq = in.readInt(); |
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449 bytesLeft -= identifierSize + 4; |
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450 ThreadObject to = getThreadObjectFromSequence(threadSeq); |
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451 StackTrace st = getStackTraceFromSerial(to.stackSeq); |
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452 snapshot.addRoot(new Root(id, to.threadId, |
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453 Root.NATIVE_STACK, "", st)); |
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454 break; |
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455 } |
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456 case HPROF_GC_ROOT_STICKY_CLASS: { |
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457 long id = readID(); |
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458 bytesLeft -= identifierSize; |
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459 snapshot.addRoot(new Root(id, 0, Root.SYSTEM_CLASS, "")); |
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460 break; |
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461 } |
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462 case HPROF_GC_ROOT_THREAD_BLOCK: { |
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463 long id = readID(); |
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464 int threadSeq = in.readInt(); |
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465 bytesLeft -= identifierSize + 4; |
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466 ThreadObject to = getThreadObjectFromSequence(threadSeq); |
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467 StackTrace st = getStackTraceFromSerial(to.stackSeq); |
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468 snapshot.addRoot(new Root(id, to.threadId, |
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469 Root.THREAD_BLOCK, "", st)); |
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470 break; |
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471 } |
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472 case HPROF_GC_ROOT_MONITOR_USED: { |
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473 long id = readID(); |
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474 bytesLeft -= identifierSize; |
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475 snapshot.addRoot(new Root(id, 0, Root.BUSY_MONITOR, "")); |
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476 break; |
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477 } |
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478 case HPROF_GC_CLASS_DUMP: { |
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479 int bytesRead = readClass(); |
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480 bytesLeft -= bytesRead; |
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481 break; |
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482 } |
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483 case HPROF_GC_INSTANCE_DUMP: { |
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484 int bytesRead = readInstance(); |
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485 bytesLeft -= bytesRead; |
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486 break; |
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487 } |
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488 case HPROF_GC_OBJ_ARRAY_DUMP: { |
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489 int bytesRead = readArray(false); |
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490 bytesLeft -= bytesRead; |
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491 break; |
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492 } |
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493 case HPROF_GC_PRIM_ARRAY_DUMP: { |
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494 int bytesRead = readArray(true); |
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495 bytesLeft -= bytesRead; |
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496 break; |
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497 } |
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498 default: { |
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499 throw new IOException("Unrecognized heap dump sub-record type: " + type); |
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500 } |
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501 } |
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502 } |
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503 if (bytesLeft != 0) { |
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504 warn("Error reading heap dump or heap dump segment: Byte count is " + bytesLeft + " instead of 0"); |
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505 skipBytes(bytesLeft); |
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506 } |
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507 if (debugLevel > 0) { |
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508 System.out.println(" Finished heap sub-records."); |
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509 } |
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510 } |
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511 |
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512 private long readID() throws IOException { |
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513 return (identifierSize == 4)? |
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514 (Snapshot.SMALL_ID_MASK & (long)in.readInt()) : in.readLong(); |
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515 } |
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516 |
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517 // |
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518 // Read a java value. If result is non-null, it's expected to be an |
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519 // array of one element. We use it to fake multiple return values. |
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520 // @returns the number of bytes read |
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521 // |
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522 private int readValue(JavaThing[] resultArr) throws IOException { |
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523 byte type = in.readByte(); |
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524 return 1 + readValueForType(type, resultArr); |
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525 } |
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526 |
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527 private int readValueForType(byte type, JavaThing[] resultArr) |
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528 throws IOException { |
|
529 if (version >= VERSION_JDK12BETA4) { |
|
530 type = signatureFromTypeId(type); |
|
531 } |
|
532 return readValueForTypeSignature(type, resultArr); |
|
533 } |
|
534 |
|
535 private int readValueForTypeSignature(byte type, JavaThing[] resultArr) |
|
536 throws IOException { |
|
537 switch (type) { |
|
538 case '[': |
|
539 case 'L': { |
|
540 long id = readID(); |
|
541 if (resultArr != null) { |
|
542 resultArr[0] = new JavaObjectRef(id); |
|
543 } |
|
544 return identifierSize; |
|
545 } |
|
546 case 'Z': { |
|
547 int b = in.readByte(); |
|
548 if (b != 0 && b != 1) { |
|
549 warn("Illegal boolean value read"); |
|
550 } |
|
551 if (resultArr != null) { |
|
552 resultArr[0] = new JavaBoolean(b != 0); |
|
553 } |
|
554 return 1; |
|
555 } |
|
556 case 'B': { |
|
557 byte b = in.readByte(); |
|
558 if (resultArr != null) { |
|
559 resultArr[0] = new JavaByte(b); |
|
560 } |
|
561 return 1; |
|
562 } |
|
563 case 'S': { |
|
564 short s = in.readShort(); |
|
565 if (resultArr != null) { |
|
566 resultArr[0] = new JavaShort(s); |
|
567 } |
|
568 return 2; |
|
569 } |
|
570 case 'C': { |
|
571 char ch = in.readChar(); |
|
572 if (resultArr != null) { |
|
573 resultArr[0] = new JavaChar(ch); |
|
574 } |
|
575 return 2; |
|
576 } |
|
577 case 'I': { |
|
578 int val = in.readInt(); |
|
579 if (resultArr != null) { |
|
580 resultArr[0] = new JavaInt(val); |
|
581 } |
|
582 return 4; |
|
583 } |
|
584 case 'J': { |
|
585 long val = in.readLong(); |
|
586 if (resultArr != null) { |
|
587 resultArr[0] = new JavaLong(val); |
|
588 } |
|
589 return 8; |
|
590 } |
|
591 case 'F': { |
|
592 float val = in.readFloat(); |
|
593 if (resultArr != null) { |
|
594 resultArr[0] = new JavaFloat(val); |
|
595 } |
|
596 return 4; |
|
597 } |
|
598 case 'D': { |
|
599 double val = in.readDouble(); |
|
600 if (resultArr != null) { |
|
601 resultArr[0] = new JavaDouble(val); |
|
602 } |
|
603 return 8; |
|
604 } |
|
605 default: { |
|
606 throw new IOException("Bad value signature: " + type); |
|
607 } |
|
608 } |
|
609 } |
|
610 |
|
611 private ThreadObject getThreadObjectFromSequence(int threadSeq) |
|
612 throws IOException { |
|
613 ThreadObject to = threadObjects.get(threadSeq); |
|
614 if (to == null) { |
|
615 throw new IOException("Thread " + threadSeq + |
|
616 " not found for JNI local ref"); |
|
617 } |
|
618 return to; |
|
619 } |
|
620 |
|
621 private String getNameFromID(long id) throws IOException { |
|
622 return getNameFromID(Long.valueOf(id)); |
|
623 } |
|
624 |
|
625 private String getNameFromID(Long id) throws IOException { |
|
626 if (id.longValue() == 0L) { |
|
627 return ""; |
|
628 } |
|
629 String result = names.get(id); |
|
630 if (result == null) { |
|
631 warn("Name not found at " + toHex(id.longValue())); |
|
632 return "unresolved name " + toHex(id.longValue()); |
|
633 } |
|
634 return result; |
|
635 } |
|
636 |
|
637 private StackTrace getStackTraceFromSerial(int ser) throws IOException { |
|
638 if (stackTraces == null) { |
|
639 return null; |
|
640 } |
|
641 StackTrace result = stackTraces.get(ser); |
|
642 if (result == null) { |
|
643 warn("Stack trace not found for serial # " + ser); |
|
644 } |
|
645 return result; |
|
646 } |
|
647 |
|
648 // |
|
649 // Handle a HPROF_GC_CLASS_DUMP |
|
650 // Return number of bytes read |
|
651 // |
|
652 private int readClass() throws IOException { |
|
653 long id = readID(); |
|
654 StackTrace stackTrace = getStackTraceFromSerial(in.readInt()); |
|
655 long superId = readID(); |
|
656 long classLoaderId = readID(); |
|
657 long signersId = readID(); |
|
658 long protDomainId = readID(); |
|
659 long reserved1 = readID(); |
|
660 long reserved2 = readID(); |
|
661 int instanceSize = in.readInt(); |
|
662 int bytesRead = 7 * identifierSize + 8; |
|
663 |
|
664 int numConstPoolEntries = in.readUnsignedShort(); |
|
665 bytesRead += 2; |
|
666 for (int i = 0; i < numConstPoolEntries; i++) { |
|
667 int index = in.readUnsignedShort(); // unused |
|
668 bytesRead += 2; |
|
669 bytesRead += readValue(null); // We ignore the values |
|
670 } |
|
671 |
|
672 int numStatics = in.readUnsignedShort(); |
|
673 bytesRead += 2; |
|
674 JavaThing[] valueBin = new JavaThing[1]; |
|
675 JavaStatic[] statics = new JavaStatic[numStatics]; |
|
676 for (int i = 0; i < numStatics; i++) { |
|
677 long nameId = readID(); |
|
678 bytesRead += identifierSize; |
|
679 byte type = in.readByte(); |
|
680 bytesRead++; |
|
681 bytesRead += readValueForType(type, valueBin); |
|
682 String fieldName = getNameFromID(nameId); |
|
683 if (version >= VERSION_JDK12BETA4) { |
|
684 type = signatureFromTypeId(type); |
|
685 } |
|
686 String signature = "" + ((char) type); |
|
687 JavaField f = new JavaField(fieldName, signature); |
|
688 statics[i] = new JavaStatic(f, valueBin[0]); |
|
689 } |
|
690 |
|
691 int numFields = in.readUnsignedShort(); |
|
692 bytesRead += 2; |
|
693 JavaField[] fields = new JavaField[numFields]; |
|
694 for (int i = 0; i < numFields; i++) { |
|
695 long nameId = readID(); |
|
696 bytesRead += identifierSize; |
|
697 byte type = in.readByte(); |
|
698 bytesRead++; |
|
699 String fieldName = getNameFromID(nameId); |
|
700 if (version >= VERSION_JDK12BETA4) { |
|
701 type = signatureFromTypeId(type); |
|
702 } |
|
703 String signature = "" + ((char) type); |
|
704 fields[i] = new JavaField(fieldName, signature); |
|
705 } |
|
706 String name = classNameFromObjectID.get(id); |
|
707 if (name == null) { |
|
708 warn("Class name not found for " + toHex(id)); |
|
709 name = "unknown-name@" + toHex(id); |
|
710 } |
|
711 JavaClass c = new JavaClass(id, name, superId, classLoaderId, signersId, |
|
712 protDomainId, fields, statics, |
|
713 instanceSize); |
|
714 snapshot.addClass(id, c); |
|
715 snapshot.setSiteTrace(c, stackTrace); |
|
716 |
|
717 return bytesRead; |
|
718 } |
|
719 |
|
720 private String toHex(long addr) { |
|
721 return com.sun.tools.hat.internal.util.Misc.toHex(addr); |
|
722 } |
|
723 |
|
724 // |
|
725 // Handle a HPROF_GC_INSTANCE_DUMP |
|
726 // Return number of bytes read |
|
727 // |
|
728 private int readInstance() throws IOException { |
|
729 long start = in.position(); |
|
730 long id = readID(); |
|
731 StackTrace stackTrace = getStackTraceFromSerial(in.readInt()); |
|
732 long classID = readID(); |
|
733 int bytesFollowing = in.readInt(); |
|
734 int bytesRead = (2 * identifierSize) + 8 + bytesFollowing; |
|
735 JavaObject jobj = new JavaObject(classID, start); |
|
736 skipBytes(bytesFollowing); |
|
737 snapshot.addHeapObject(id, jobj); |
|
738 snapshot.setSiteTrace(jobj, stackTrace); |
|
739 return bytesRead; |
|
740 } |
|
741 |
|
742 // |
|
743 // Handle a HPROF_GC_OBJ_ARRAY_DUMP or HPROF_GC_PRIM_ARRAY_DUMP |
|
744 // Return number of bytes read |
|
745 // |
|
746 private int readArray(boolean isPrimitive) throws IOException { |
|
747 long start = in.position(); |
|
748 long id = readID(); |
|
749 StackTrace stackTrace = getStackTraceFromSerial(in.readInt()); |
|
750 int num = in.readInt(); |
|
751 int bytesRead = identifierSize + 8; |
|
752 long elementClassID; |
|
753 if (isPrimitive) { |
|
754 elementClassID = in.readByte(); |
|
755 bytesRead++; |
|
756 } else { |
|
757 elementClassID = readID(); |
|
758 bytesRead += identifierSize; |
|
759 } |
|
760 |
|
761 // Check for primitive arrays: |
|
762 byte primitiveSignature = 0x00; |
|
763 int elSize = 0; |
|
764 if (isPrimitive || version < VERSION_JDK12BETA4) { |
|
765 switch ((int)elementClassID) { |
|
766 case T_BOOLEAN: { |
|
767 primitiveSignature = (byte) 'Z'; |
|
768 elSize = 1; |
|
769 break; |
|
770 } |
|
771 case T_CHAR: { |
|
772 primitiveSignature = (byte) 'C'; |
|
773 elSize = 2; |
|
774 break; |
|
775 } |
|
776 case T_FLOAT: { |
|
777 primitiveSignature = (byte) 'F'; |
|
778 elSize = 4; |
|
779 break; |
|
780 } |
|
781 case T_DOUBLE: { |
|
782 primitiveSignature = (byte) 'D'; |
|
783 elSize = 8; |
|
784 break; |
|
785 } |
|
786 case T_BYTE: { |
|
787 primitiveSignature = (byte) 'B'; |
|
788 elSize = 1; |
|
789 break; |
|
790 } |
|
791 case T_SHORT: { |
|
792 primitiveSignature = (byte) 'S'; |
|
793 elSize = 2; |
|
794 break; |
|
795 } |
|
796 case T_INT: { |
|
797 primitiveSignature = (byte) 'I'; |
|
798 elSize = 4; |
|
799 break; |
|
800 } |
|
801 case T_LONG: { |
|
802 primitiveSignature = (byte) 'J'; |
|
803 elSize = 8; |
|
804 break; |
|
805 } |
|
806 } |
|
807 if (version >= VERSION_JDK12BETA4 && primitiveSignature == 0x00) { |
|
808 throw new IOException("Unrecognized typecode: " |
|
809 + elementClassID); |
|
810 } |
|
811 } |
|
812 if (primitiveSignature != 0x00) { |
|
813 int size = elSize * num; |
|
814 bytesRead += size; |
|
815 JavaValueArray va = new JavaValueArray(primitiveSignature, start); |
|
816 skipBytes(size); |
|
817 snapshot.addHeapObject(id, va); |
|
818 snapshot.setSiteTrace(va, stackTrace); |
|
819 } else { |
|
820 int sz = num * identifierSize; |
|
821 bytesRead += sz; |
|
822 JavaObjectArray arr = new JavaObjectArray(elementClassID, start); |
|
823 skipBytes(sz); |
|
824 snapshot.addHeapObject(id, arr); |
|
825 snapshot.setSiteTrace(arr, stackTrace); |
|
826 } |
|
827 return bytesRead; |
|
828 } |
|
829 |
|
830 private byte signatureFromTypeId(byte typeId) throws IOException { |
|
831 switch (typeId) { |
|
832 case T_CLASS: { |
|
833 return (byte) 'L'; |
|
834 } |
|
835 case T_BOOLEAN: { |
|
836 return (byte) 'Z'; |
|
837 } |
|
838 case T_CHAR: { |
|
839 return (byte) 'C'; |
|
840 } |
|
841 case T_FLOAT: { |
|
842 return (byte) 'F'; |
|
843 } |
|
844 case T_DOUBLE: { |
|
845 return (byte) 'D'; |
|
846 } |
|
847 case T_BYTE: { |
|
848 return (byte) 'B'; |
|
849 } |
|
850 case T_SHORT: { |
|
851 return (byte) 'S'; |
|
852 } |
|
853 case T_INT: { |
|
854 return (byte) 'I'; |
|
855 } |
|
856 case T_LONG: { |
|
857 return (byte) 'J'; |
|
858 } |
|
859 default: { |
|
860 throw new IOException("Invalid type id of " + typeId); |
|
861 } |
|
862 } |
|
863 } |
|
864 |
|
865 private void handleEOF(EOFException exp, Snapshot snapshot) { |
|
866 if (debugLevel > 0) { |
|
867 exp.printStackTrace(); |
|
868 } |
|
869 warn("Unexpected EOF. Will miss information..."); |
|
870 // we have EOF, we have to tolerate missing references |
|
871 snapshot.setUnresolvedObjectsOK(true); |
|
872 } |
|
873 |
|
874 private void warn(String msg) { |
|
875 System.out.println("WARNING: " + msg); |
|
876 } |
|
877 |
|
878 // |
|
879 // A trivial data-holder class for HPROF_GC_ROOT_THREAD_OBJ. |
|
880 // |
|
881 private class ThreadObject { |
|
882 |
|
883 long threadId; |
|
884 int stackSeq; |
|
885 |
|
886 ThreadObject(long threadId, int stackSeq) { |
|
887 this.threadId = threadId; |
|
888 this.stackSeq = stackSeq; |
|
889 } |
|
890 } |
|
891 |
|
892 } |
|