0
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1 /*
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2 * Copyright 2005-2007 Sun Microsystems, Inc. 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.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 # include "incls/_precompiled.incl"
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26 # include "incls/_heapDumper.cpp.incl"
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27
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28 /*
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29 * HPROF binary format - description copied from:
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30 * src/share/demo/jvmti/hprof/hprof_io.c
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31 *
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32 *
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33 * header "JAVA PROFILE 1.0.1" or "JAVA PROFILE 1.0.2"
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34 * (0-terminated)
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35 *
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36 * u4 size of identifiers. Identifiers are used to represent
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37 * UTF8 strings, objects, stack traces, etc. They usually
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38 * have the same size as host pointers. For example, on
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39 * Solaris and Win32, the size is 4.
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40 * u4 high word
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41 * u4 low word number of milliseconds since 0:00 GMT, 1/1/70
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42 * [record]* a sequence of records.
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43 *
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44 *
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45 * Record format:
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46 *
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47 * u1 a TAG denoting the type of the record
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48 * u4 number of *microseconds* since the time stamp in the
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49 * header. (wraps around in a little more than an hour)
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50 * u4 number of bytes *remaining* in the record. Note that
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51 * this number excludes the tag and the length field itself.
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52 * [u1]* BODY of the record (a sequence of bytes)
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53 *
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54 *
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55 * The following TAGs are supported:
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56 *
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57 * TAG BODY notes
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58 *----------------------------------------------------------
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59 * HPROF_UTF8 a UTF8-encoded name
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60 *
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61 * id name ID
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62 * [u1]* UTF8 characters (no trailing zero)
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63 *
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64 * HPROF_LOAD_CLASS a newly loaded class
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65 *
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66 * u4 class serial number (> 0)
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67 * id class object ID
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68 * u4 stack trace serial number
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69 * id class name ID
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70 *
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71 * HPROF_UNLOAD_CLASS an unloading class
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72 *
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73 * u4 class serial_number
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74 *
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75 * HPROF_FRAME a Java stack frame
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76 *
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77 * id stack frame ID
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78 * id method name ID
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79 * id method signature ID
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80 * id source file name ID
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81 * u4 class serial number
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82 * i4 line number. >0: normal
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83 * -1: unknown
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84 * -2: compiled method
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85 * -3: native method
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86 *
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87 * HPROF_TRACE a Java stack trace
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88 *
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89 * u4 stack trace serial number
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90 * u4 thread serial number
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91 * u4 number of frames
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92 * [id]* stack frame IDs
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93 *
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94 *
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95 * HPROF_ALLOC_SITES a set of heap allocation sites, obtained after GC
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96 *
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97 * u2 flags 0x0001: incremental vs. complete
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98 * 0x0002: sorted by allocation vs. live
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99 * 0x0004: whether to force a GC
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100 * u4 cutoff ratio
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101 * u4 total live bytes
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102 * u4 total live instances
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103 * u8 total bytes allocated
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104 * u8 total instances allocated
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105 * u4 number of sites that follow
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106 * [u1 is_array: 0: normal object
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107 * 2: object array
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108 * 4: boolean array
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109 * 5: char array
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110 * 6: float array
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111 * 7: double array
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112 * 8: byte array
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113 * 9: short array
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114 * 10: int array
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115 * 11: long array
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116 * u4 class serial number (may be zero during startup)
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117 * u4 stack trace serial number
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118 * u4 number of bytes alive
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119 * u4 number of instances alive
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120 * u4 number of bytes allocated
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121 * u4]* number of instance allocated
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122 *
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123 * HPROF_START_THREAD a newly started thread.
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124 *
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125 * u4 thread serial number (> 0)
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126 * id thread object ID
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127 * u4 stack trace serial number
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128 * id thread name ID
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129 * id thread group name ID
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130 * id thread group parent name ID
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131 *
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132 * HPROF_END_THREAD a terminating thread.
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133 *
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134 * u4 thread serial number
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135 *
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136 * HPROF_HEAP_SUMMARY heap summary
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137 *
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138 * u4 total live bytes
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139 * u4 total live instances
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140 * u8 total bytes allocated
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141 * u8 total instances allocated
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142 *
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143 * HPROF_HEAP_DUMP denote a heap dump
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144 *
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145 * [heap dump sub-records]*
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146 *
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147 * There are four kinds of heap dump sub-records:
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148 *
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149 * u1 sub-record type
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150 *
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151 * HPROF_GC_ROOT_UNKNOWN unknown root
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152 *
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153 * id object ID
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154 *
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155 * HPROF_GC_ROOT_THREAD_OBJ thread object
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156 *
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157 * id thread object ID (may be 0 for a
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158 * thread newly attached through JNI)
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159 * u4 thread sequence number
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160 * u4 stack trace sequence number
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161 *
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162 * HPROF_GC_ROOT_JNI_GLOBAL JNI global ref root
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163 *
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164 * id object ID
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165 * id JNI global ref ID
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166 *
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167 * HPROF_GC_ROOT_JNI_LOCAL JNI local ref
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168 *
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169 * id object ID
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170 * u4 thread serial number
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171 * u4 frame # in stack trace (-1 for empty)
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172 *
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173 * HPROF_GC_ROOT_JAVA_FRAME Java stack frame
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174 *
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175 * id object ID
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176 * u4 thread serial number
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177 * u4 frame # in stack trace (-1 for empty)
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178 *
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179 * HPROF_GC_ROOT_NATIVE_STACK Native stack
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180 *
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181 * id object ID
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182 * u4 thread serial number
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183 *
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184 * HPROF_GC_ROOT_STICKY_CLASS System class
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185 *
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186 * id object ID
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187 *
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188 * HPROF_GC_ROOT_THREAD_BLOCK Reference from thread block
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189 *
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190 * id object ID
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191 * u4 thread serial number
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192 *
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193 * HPROF_GC_ROOT_MONITOR_USED Busy monitor
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194 *
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195 * id object ID
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196 *
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197 * HPROF_GC_CLASS_DUMP dump of a class object
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198 *
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199 * id class object ID
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200 * u4 stack trace serial number
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201 * id super class object ID
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202 * id class loader object ID
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203 * id signers object ID
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204 * id protection domain object ID
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205 * id reserved
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206 * id reserved
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207 *
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208 * u4 instance size (in bytes)
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209 *
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210 * u2 size of constant pool
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211 * [u2, constant pool index,
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212 * ty, type
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213 * 2: object
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214 * 4: boolean
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215 * 5: char
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216 * 6: float
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217 * 7: double
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218 * 8: byte
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219 * 9: short
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220 * 10: int
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221 * 11: long
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222 * vl]* and value
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223 *
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224 * u2 number of static fields
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225 * [id, static field name,
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226 * ty, type,
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227 * vl]* and value
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228 *
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229 * u2 number of inst. fields (not inc. super)
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230 * [id, instance field name,
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231 * ty]* type
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232 *
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233 * HPROF_GC_INSTANCE_DUMP dump of a normal object
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234 *
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235 * id object ID
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236 * u4 stack trace serial number
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237 * id class object ID
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238 * u4 number of bytes that follow
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239 * [vl]* instance field values (class, followed
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240 * by super, super's super ...)
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241 *
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242 * HPROF_GC_OBJ_ARRAY_DUMP dump of an object array
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243 *
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244 * id array object ID
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245 * u4 stack trace serial number
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246 * u4 number of elements
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247 * id array class ID
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248 * [id]* elements
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249 *
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250 * HPROF_GC_PRIM_ARRAY_DUMP dump of a primitive array
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251 *
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252 * id array object ID
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253 * u4 stack trace serial number
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254 * u4 number of elements
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255 * u1 element type
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256 * 4: boolean array
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257 * 5: char array
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258 * 6: float array
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259 * 7: double array
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260 * 8: byte array
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261 * 9: short array
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262 * 10: int array
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263 * 11: long array
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264 * [u1]* elements
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265 *
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266 * HPROF_CPU_SAMPLES a set of sample traces of running threads
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267 *
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268 * u4 total number of samples
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269 * u4 # of traces
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270 * [u4 # of samples
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271 * u4]* stack trace serial number
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272 *
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273 * HPROF_CONTROL_SETTINGS the settings of on/off switches
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274 *
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275 * u4 0x00000001: alloc traces on/off
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276 * 0x00000002: cpu sampling on/off
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277 * u2 stack trace depth
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278 *
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279 *
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280 * When the header is "JAVA PROFILE 1.0.2" a heap dump can optionally
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281 * be generated as a sequence of heap dump segments. This sequence is
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282 * terminated by an end record. The additional tags allowed by format
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283 * "JAVA PROFILE 1.0.2" are:
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284 *
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285 * HPROF_HEAP_DUMP_SEGMENT denote a heap dump segment
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286 *
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287 * [heap dump sub-records]*
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288 * The same sub-record types allowed by HPROF_HEAP_DUMP
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289 *
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290 * HPROF_HEAP_DUMP_END denotes the end of a heap dump
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291 *
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292 */
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293
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294
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295 // HPROF tags
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296
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297 typedef enum {
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298 // top-level records
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299 HPROF_UTF8 = 0x01,
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300 HPROF_LOAD_CLASS = 0x02,
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301 HPROF_UNLOAD_CLASS = 0x03,
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302 HPROF_FRAME = 0x04,
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303 HPROF_TRACE = 0x05,
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304 HPROF_ALLOC_SITES = 0x06,
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305 HPROF_HEAP_SUMMARY = 0x07,
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306 HPROF_START_THREAD = 0x0A,
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307 HPROF_END_THREAD = 0x0B,
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308 HPROF_HEAP_DUMP = 0x0C,
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309 HPROF_CPU_SAMPLES = 0x0D,
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310 HPROF_CONTROL_SETTINGS = 0x0E,
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311
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312 // 1.0.2 record types
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313 HPROF_HEAP_DUMP_SEGMENT = 0x1C,
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314 HPROF_HEAP_DUMP_END = 0x2C,
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315
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316 // field types
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317 HPROF_ARRAY_OBJECT = 0x01,
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318 HPROF_NORMAL_OBJECT = 0x02,
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319 HPROF_BOOLEAN = 0x04,
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320 HPROF_CHAR = 0x05,
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321 HPROF_FLOAT = 0x06,
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322 HPROF_DOUBLE = 0x07,
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323 HPROF_BYTE = 0x08,
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324 HPROF_SHORT = 0x09,
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325 HPROF_INT = 0x0A,
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326 HPROF_LONG = 0x0B,
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327
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328 // data-dump sub-records
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329 HPROF_GC_ROOT_UNKNOWN = 0xFF,
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330 HPROF_GC_ROOT_JNI_GLOBAL = 0x01,
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331 HPROF_GC_ROOT_JNI_LOCAL = 0x02,
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332 HPROF_GC_ROOT_JAVA_FRAME = 0x03,
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333 HPROF_GC_ROOT_NATIVE_STACK = 0x04,
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334 HPROF_GC_ROOT_STICKY_CLASS = 0x05,
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335 HPROF_GC_ROOT_THREAD_BLOCK = 0x06,
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336 HPROF_GC_ROOT_MONITOR_USED = 0x07,
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337 HPROF_GC_ROOT_THREAD_OBJ = 0x08,
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338 HPROF_GC_CLASS_DUMP = 0x20,
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339 HPROF_GC_INSTANCE_DUMP = 0x21,
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340 HPROF_GC_OBJ_ARRAY_DUMP = 0x22,
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341 HPROF_GC_PRIM_ARRAY_DUMP = 0x23
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342 } hprofTag;
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343
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344 // Default stack trace ID (used for dummy HPROF_TRACE record)
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345 enum {
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346 STACK_TRACE_ID = 1
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347 };
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348
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349
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350 // Supports I/O operations on a dump file
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351
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352 class DumpWriter : public StackObj {
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353 private:
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354 enum {
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355 io_buffer_size = 8*M
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356 };
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357
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358 int _fd; // file descriptor (-1 if dump file not open)
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359 jlong _bytes_written; // number of byte written to dump file
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360
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361 char* _buffer; // internal buffer
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362 int _size;
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363 int _pos;
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364
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365 char* _error; // error message when I/O fails
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366
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367 void set_file_descriptor(int fd) { _fd = fd; }
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368 int file_descriptor() const { return _fd; }
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369
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370 char* buffer() const { return _buffer; }
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371 int buffer_size() const { return _size; }
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372 int position() const { return _pos; }
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373 void set_position(int pos) { _pos = pos; }
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374
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375 void set_error(const char* error) { _error = (char*)os::strdup(error); }
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376
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377 // all I/O go through this function
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378 void write_internal(void* s, int len);
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379
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380 public:
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381 DumpWriter(const char* path);
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382 ~DumpWriter();
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383
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384 void close();
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385 bool is_open() const { return file_descriptor() >= 0; }
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386 void flush();
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387
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388 // total number of bytes written to the disk
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389 jlong bytes_written() const { return _bytes_written; }
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390
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391 // adjust the number of bytes written to disk (used to keep the count
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392 // of the number of bytes written in case of rewrites)
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393 void adjust_bytes_written(jlong n) { _bytes_written += n; }
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394
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395 // number of (buffered) bytes as yet unwritten to the dump file
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396 jlong bytes_unwritten() const { return (jlong)position(); }
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397
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398 char* error() const { return _error; }
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399
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400 jlong current_offset();
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401 void seek_to_offset(jlong pos);
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402
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403 // writer functions
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404 void write_raw(void* s, int len);
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405 void write_u1(u1 x) { write_raw((void*)&x, 1); }
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406 void write_u2(u2 x);
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407 void write_u4(u4 x);
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408 void write_u8(u8 x);
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409 void write_objectID(oop o);
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410 void write_classID(Klass* k);
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411 };
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412
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413 DumpWriter::DumpWriter(const char* path) {
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414 // try to allocate an I/O buffer of io_buffer_size. If there isn't
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415 // sufficient memory then reduce size until we can allocate something.
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416 _size = io_buffer_size;
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417 do {
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418 _buffer = (char*)os::malloc(_size);
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419 if (_buffer == NULL) {
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420 _size = _size >> 1;
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421 }
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422 } while (_buffer == NULL && _size > 0);
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423 assert((_size > 0 && _buffer != NULL) || (_size == 0 && _buffer == NULL), "sanity check");
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424 _pos = 0;
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425 _error = NULL;
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426 _bytes_written = 0L;
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427 _fd = os::create_binary_file(path, false); // don't replace existing file
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428
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429 // if the open failed we record the error
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430 if (_fd < 0) {
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431 _error = (char*)os::strdup(strerror(errno));
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432 }
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433 }
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434
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435 DumpWriter::~DumpWriter() {
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436 // flush and close dump file
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437 if (file_descriptor() >= 0) {
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438 close();
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439 }
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440 if (_buffer != NULL) os::free(_buffer);
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441 if (_error != NULL) os::free(_error);
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442 }
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443
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444 // closes dump file (if open)
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445 void DumpWriter::close() {
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446 // flush and close dump file
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447 if (file_descriptor() >= 0) {
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448 flush();
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449 ::close(file_descriptor());
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450 }
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451 }
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452
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453 // write directly to the file
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454 void DumpWriter::write_internal(void* s, int len) {
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455 if (is_open()) {
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456 int n = ::write(file_descriptor(), s, len);
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457 if (n > 0) {
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458 _bytes_written += n;
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459 }
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460 if (n != len) {
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461 if (n < 0) {
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462 set_error(strerror(errno));
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463 } else {
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464 set_error("file size limit");
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465 }
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466 ::close(file_descriptor());
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467 set_file_descriptor(-1);
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468 }
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469 }
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470 }
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471
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472 // write raw bytes
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473 void DumpWriter::write_raw(void* s, int len) {
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474 if (is_open()) {
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475 // flush buffer to make toom
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476 if ((position()+ len) >= buffer_size()) {
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477 flush();
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478 }
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479
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480 // buffer not available or too big to buffer it
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481 if ((buffer() == NULL) || (len >= buffer_size())) {
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482 write_internal(s, len);
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483 } else {
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484 // Should optimize this for u1/u2/u4/u8 sizes.
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485 memcpy(buffer() + position(), s, len);
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486 set_position(position() + len);
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487 }
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488 }
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489 }
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490
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491 // flush any buffered bytes to the file
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492 void DumpWriter::flush() {
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493 if (is_open() && position() > 0) {
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494 write_internal(buffer(), position());
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495 set_position(0);
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496 }
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497 }
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498
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499
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500 jlong DumpWriter::current_offset() {
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501 if (is_open()) {
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502 // the offset is the file offset plus whatever we have buffered
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503 jlong offset = os::current_file_offset(file_descriptor());
|
|
504 assert(offset >= 0, "lseek failed");
|
|
505 return offset + (jlong)position();
|
|
506 } else {
|
|
507 return (jlong)-1;
|
|
508 }
|
|
509 }
|
|
510
|
|
511 void DumpWriter::seek_to_offset(jlong off) {
|
|
512 assert(off >= 0, "bad offset");
|
|
513
|
|
514 // need to flush before seeking
|
|
515 flush();
|
|
516
|
|
517 // may be closed due to I/O error
|
|
518 if (is_open()) {
|
|
519 jlong n = os::seek_to_file_offset(file_descriptor(), off);
|
|
520 assert(n >= 0, "lseek failed");
|
|
521 }
|
|
522 }
|
|
523
|
|
524 void DumpWriter::write_u2(u2 x) {
|
|
525 u2 v;
|
|
526 Bytes::put_Java_u2((address)&v, x);
|
|
527 write_raw((void*)&v, 2);
|
|
528 }
|
|
529
|
|
530 void DumpWriter::write_u4(u4 x) {
|
|
531 u4 v;
|
|
532 Bytes::put_Java_u4((address)&v, x);
|
|
533 write_raw((void*)&v, 4);
|
|
534 }
|
|
535
|
|
536 void DumpWriter::write_u8(u8 x) {
|
|
537 u8 v;
|
|
538 Bytes::put_Java_u8((address)&v, x);
|
|
539 write_raw((void*)&v, 8);
|
|
540 }
|
|
541
|
|
542 void DumpWriter::write_objectID(oop o) {
|
|
543 address a = (address)((uintptr_t)o);
|
|
544 #ifdef _LP64
|
|
545 write_u8((u8)a);
|
|
546 #else
|
|
547 write_u4((u4)a);
|
|
548 #endif
|
|
549 }
|
|
550
|
|
551 // We use java mirror as the class ID
|
|
552 void DumpWriter::write_classID(Klass* k) {
|
|
553 write_objectID(k->java_mirror());
|
|
554 }
|
|
555
|
|
556
|
|
557
|
|
558 // Support class with a collection of functions used when dumping the heap
|
|
559
|
|
560 class DumperSupport : AllStatic {
|
|
561 public:
|
|
562
|
|
563 // write a header of the given type
|
|
564 static void write_header(DumpWriter* writer, hprofTag tag, u4 len);
|
|
565
|
|
566 // returns hprof tag for the given type signature
|
|
567 static hprofTag sig2tag(symbolOop sig);
|
|
568 // returns hprof tag for the given basic type
|
|
569 static hprofTag type2tag(BasicType type);
|
|
570
|
|
571 // returns the size of the instance of the given class
|
|
572 static u4 instance_size(klassOop k);
|
|
573
|
|
574 // dump a jfloat
|
|
575 static void dump_float(DumpWriter* writer, jfloat f);
|
|
576 // dump a jdouble
|
|
577 static void dump_double(DumpWriter* writer, jdouble d);
|
|
578 // dumps the raw value of the given field
|
|
579 static void dump_field_value(DumpWriter* writer, char type, address addr);
|
|
580 // dumps static fields of the given class
|
|
581 static void dump_static_fields(DumpWriter* writer, klassOop k);
|
|
582 // dump the raw values of the instance fields of the given object
|
|
583 static void dump_instance_fields(DumpWriter* writer, oop o);
|
|
584 // dumps the definition of the instance fields for a given class
|
|
585 static void dump_instance_field_descriptors(DumpWriter* writer, klassOop k);
|
|
586 // creates HPROF_GC_INSTANCE_DUMP record for the given object
|
|
587 static void dump_instance(DumpWriter* writer, oop o);
|
|
588 // creates HPROF_GC_CLASS_DUMP record for the given class and each of its
|
|
589 // array classes
|
|
590 static void dump_class_and_array_classes(DumpWriter* writer, klassOop k);
|
|
591 // creates HPROF_GC_CLASS_DUMP record for a given primitive array
|
|
592 // class (and each multi-dimensional array class too)
|
|
593 static void dump_basic_type_array_class(DumpWriter* writer, klassOop k);
|
|
594
|
|
595 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array
|
|
596 static void dump_object_array(DumpWriter* writer, objArrayOop array);
|
|
597 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array
|
|
598 static void dump_prim_array(DumpWriter* writer, typeArrayOop array);
|
|
599 };
|
|
600
|
|
601 // write a header of the given type
|
|
602 void DumperSupport:: write_header(DumpWriter* writer, hprofTag tag, u4 len) {
|
|
603 writer->write_u1((u1)tag);
|
|
604 writer->write_u4(0); // current ticks
|
|
605 writer->write_u4(len);
|
|
606 }
|
|
607
|
|
608 // returns hprof tag for the given type signature
|
|
609 hprofTag DumperSupport::sig2tag(symbolOop sig) {
|
|
610 switch (sig->byte_at(0)) {
|
|
611 case JVM_SIGNATURE_CLASS : return HPROF_NORMAL_OBJECT;
|
|
612 case JVM_SIGNATURE_ARRAY : return HPROF_NORMAL_OBJECT;
|
|
613 case JVM_SIGNATURE_BYTE : return HPROF_BYTE;
|
|
614 case JVM_SIGNATURE_CHAR : return HPROF_CHAR;
|
|
615 case JVM_SIGNATURE_FLOAT : return HPROF_FLOAT;
|
|
616 case JVM_SIGNATURE_DOUBLE : return HPROF_DOUBLE;
|
|
617 case JVM_SIGNATURE_INT : return HPROF_INT;
|
|
618 case JVM_SIGNATURE_LONG : return HPROF_LONG;
|
|
619 case JVM_SIGNATURE_SHORT : return HPROF_SHORT;
|
|
620 case JVM_SIGNATURE_BOOLEAN : return HPROF_BOOLEAN;
|
|
621 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE;
|
|
622 }
|
|
623 }
|
|
624
|
|
625 hprofTag DumperSupport::type2tag(BasicType type) {
|
|
626 switch (type) {
|
|
627 case T_BYTE : return HPROF_BYTE;
|
|
628 case T_CHAR : return HPROF_CHAR;
|
|
629 case T_FLOAT : return HPROF_FLOAT;
|
|
630 case T_DOUBLE : return HPROF_DOUBLE;
|
|
631 case T_INT : return HPROF_INT;
|
|
632 case T_LONG : return HPROF_LONG;
|
|
633 case T_SHORT : return HPROF_SHORT;
|
|
634 case T_BOOLEAN : return HPROF_BOOLEAN;
|
|
635 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE;
|
|
636 }
|
|
637 }
|
|
638
|
|
639 // dump a jfloat
|
|
640 void DumperSupport::dump_float(DumpWriter* writer, jfloat f) {
|
|
641 if (g_isnan(f)) {
|
|
642 writer->write_u4(0x7fc00000); // collapsing NaNs
|
|
643 } else {
|
|
644 union {
|
|
645 int i;
|
|
646 float f;
|
|
647 } u;
|
|
648 u.f = (float)f;
|
|
649 writer->write_u4((u4)u.i);
|
|
650 }
|
|
651 }
|
|
652
|
|
653 // dump a jdouble
|
|
654 void DumperSupport::dump_double(DumpWriter* writer, jdouble d) {
|
|
655 union {
|
|
656 jlong l;
|
|
657 double d;
|
|
658 } u;
|
|
659 if (g_isnan(d)) { // collapsing NaNs
|
|
660 u.l = (jlong)(0x7ff80000);
|
|
661 u.l = (u.l << 32);
|
|
662 } else {
|
|
663 u.d = (double)d;
|
|
664 }
|
|
665 writer->write_u8((u8)u.l);
|
|
666 }
|
|
667
|
|
668 // dumps the raw value of the given field
|
|
669 void DumperSupport::dump_field_value(DumpWriter* writer, char type, address addr) {
|
|
670 switch (type) {
|
|
671 case JVM_SIGNATURE_CLASS :
|
|
672 case JVM_SIGNATURE_ARRAY : {
|
|
673 oop* f = (oop*)addr;
|
|
674 oop o = *f;
|
|
675
|
|
676 // reflection and sun.misc.Unsafe classes may have a reference to a
|
|
677 // klassOop so filter it out.
|
|
678 if (o != NULL && o->is_klass()) {
|
|
679 o = NULL;
|
|
680 }
|
|
681
|
|
682 // FIXME: When sharing is enabled we don't emit field references to objects
|
|
683 // in shared spaces. We can remove this once we write records for the classes
|
|
684 // and strings that are shared.
|
|
685 if (o != NULL && o->is_shared()) {
|
|
686 o = NULL;
|
|
687 }
|
|
688 writer->write_objectID(o);
|
|
689 break;
|
|
690 }
|
|
691 case JVM_SIGNATURE_BYTE : {
|
|
692 jbyte* b = (jbyte*)addr;
|
|
693 writer->write_u1((u1)*b);
|
|
694 break;
|
|
695 }
|
|
696 case JVM_SIGNATURE_CHAR : {
|
|
697 jchar* c = (jchar*)addr;
|
|
698 writer->write_u2((u2)*c);
|
|
699 break;
|
|
700 }
|
|
701 case JVM_SIGNATURE_SHORT : {
|
|
702 jshort* s = (jshort*)addr;
|
|
703 writer->write_u2((u2)*s);
|
|
704 break;
|
|
705 }
|
|
706 case JVM_SIGNATURE_FLOAT : {
|
|
707 jfloat* f = (jfloat*)addr;
|
|
708 dump_float(writer, *f);
|
|
709 break;
|
|
710 }
|
|
711 case JVM_SIGNATURE_DOUBLE : {
|
|
712 jdouble* f = (jdouble*)addr;
|
|
713 dump_double(writer, *f);
|
|
714 break;
|
|
715 }
|
|
716 case JVM_SIGNATURE_INT : {
|
|
717 jint* i = (jint*)addr;
|
|
718 writer->write_u4((u4)*i);
|
|
719 break;
|
|
720 }
|
|
721 case JVM_SIGNATURE_LONG : {
|
|
722 jlong* l = (jlong*)addr;
|
|
723 writer->write_u8((u8)*l);
|
|
724 break;
|
|
725 }
|
|
726 case JVM_SIGNATURE_BOOLEAN : {
|
|
727 jboolean* b = (jboolean*)addr;
|
|
728 writer->write_u1((u1)*b);
|
|
729 break;
|
|
730 }
|
|
731 default : ShouldNotReachHere();
|
|
732 }
|
|
733 }
|
|
734
|
|
735 // returns the size of the instance of the given class
|
|
736 u4 DumperSupport::instance_size(klassOop k) {
|
|
737 HandleMark hm;
|
|
738 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k);
|
|
739
|
|
740 int size = 0;
|
|
741
|
|
742 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) {
|
|
743 if (!fld.access_flags().is_static()) {
|
|
744 symbolOop sig = fld.signature();
|
|
745 switch (sig->byte_at(0)) {
|
|
746 case JVM_SIGNATURE_CLASS :
|
|
747 case JVM_SIGNATURE_ARRAY : size += oopSize; break;
|
|
748
|
|
749 case JVM_SIGNATURE_BYTE :
|
|
750 case JVM_SIGNATURE_BOOLEAN : size += 1; break;
|
|
751
|
|
752 case JVM_SIGNATURE_CHAR :
|
|
753 case JVM_SIGNATURE_SHORT : size += 2; break;
|
|
754
|
|
755 case JVM_SIGNATURE_INT :
|
|
756 case JVM_SIGNATURE_FLOAT : size += 4; break;
|
|
757
|
|
758 case JVM_SIGNATURE_LONG :
|
|
759 case JVM_SIGNATURE_DOUBLE : size += 8; break;
|
|
760
|
|
761 default : ShouldNotReachHere();
|
|
762 }
|
|
763 }
|
|
764 }
|
|
765 return (u4)size;
|
|
766 }
|
|
767
|
|
768 // dumps static fields of the given class
|
|
769 void DumperSupport::dump_static_fields(DumpWriter* writer, klassOop k) {
|
|
770 HandleMark hm;
|
|
771 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k);
|
|
772
|
|
773 // pass 1 - count the static fields
|
|
774 u2 field_count = 0;
|
|
775 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) {
|
|
776 if (fldc.access_flags().is_static()) field_count++;
|
|
777 }
|
|
778
|
|
779 writer->write_u2(field_count);
|
|
780
|
|
781 // pass 2 - dump the field descriptors and raw values
|
|
782 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) {
|
|
783 if (fld.access_flags().is_static()) {
|
|
784 symbolOop sig = fld.signature();
|
|
785
|
|
786 writer->write_objectID(fld.name()); // name
|
|
787 writer->write_u1(sig2tag(sig)); // type
|
|
788
|
|
789 // value
|
|
790 int offset = fld.offset();
|
|
791 address addr = (address)k + offset;
|
|
792
|
|
793 dump_field_value(writer, sig->byte_at(0), addr);
|
|
794 }
|
|
795 }
|
|
796 }
|
|
797
|
|
798 // dump the raw values of the instance fields of the given object
|
|
799 void DumperSupport::dump_instance_fields(DumpWriter* writer, oop o) {
|
|
800 HandleMark hm;
|
|
801 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), o->klass());
|
|
802
|
|
803 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) {
|
|
804 if (!fld.access_flags().is_static()) {
|
|
805 symbolOop sig = fld.signature();
|
|
806 address addr = (address)o + fld.offset();
|
|
807
|
|
808 dump_field_value(writer, sig->byte_at(0), addr);
|
|
809 }
|
|
810 }
|
|
811 }
|
|
812
|
|
813 // dumps the definition of the instance fields for a given class
|
|
814 void DumperSupport::dump_instance_field_descriptors(DumpWriter* writer, klassOop k) {
|
|
815 HandleMark hm;
|
|
816 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k);
|
|
817
|
|
818 // pass 1 - count the instance fields
|
|
819 u2 field_count = 0;
|
|
820 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) {
|
|
821 if (!fldc.access_flags().is_static()) field_count++;
|
|
822 }
|
|
823
|
|
824 writer->write_u2(field_count);
|
|
825
|
|
826 // pass 2 - dump the field descriptors
|
|
827 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) {
|
|
828 if (!fld.access_flags().is_static()) {
|
|
829 symbolOop sig = fld.signature();
|
|
830
|
|
831 writer->write_objectID(fld.name()); // name
|
|
832 writer->write_u1(sig2tag(sig)); // type
|
|
833 }
|
|
834 }
|
|
835 }
|
|
836
|
|
837 // creates HPROF_GC_INSTANCE_DUMP record for the given object
|
|
838 void DumperSupport::dump_instance(DumpWriter* writer, oop o) {
|
|
839 klassOop k = o->klass();
|
|
840
|
|
841 writer->write_u1(HPROF_GC_INSTANCE_DUMP);
|
|
842 writer->write_objectID(o);
|
|
843 writer->write_u4(STACK_TRACE_ID);
|
|
844
|
|
845 // class ID
|
|
846 writer->write_classID(Klass::cast(k));
|
|
847
|
|
848 // number of bytes that follow
|
|
849 writer->write_u4(instance_size(k) );
|
|
850
|
|
851 // field values
|
|
852 dump_instance_fields(writer, o);
|
|
853 }
|
|
854
|
|
855 // creates HPROF_GC_CLASS_DUMP record for the given class and each of
|
|
856 // its array classes
|
|
857 void DumperSupport::dump_class_and_array_classes(DumpWriter* writer, klassOop k) {
|
|
858 Klass* klass = Klass::cast(k);
|
|
859 assert(klass->oop_is_instance(), "not an instanceKlass");
|
|
860 instanceKlass* ik = (instanceKlass*)klass;
|
|
861
|
|
862 writer->write_u1(HPROF_GC_CLASS_DUMP);
|
|
863
|
|
864 // class ID
|
|
865 writer->write_classID(ik);
|
|
866 writer->write_u4(STACK_TRACE_ID);
|
|
867
|
|
868 // super class ID
|
|
869 klassOop java_super = ik->java_super();
|
|
870 if (java_super == NULL) {
|
|
871 writer->write_objectID(NULL);
|
|
872 } else {
|
|
873 writer->write_classID(Klass::cast(java_super));
|
|
874 }
|
|
875
|
|
876 writer->write_objectID(ik->class_loader());
|
|
877 writer->write_objectID(ik->signers());
|
|
878 writer->write_objectID(ik->protection_domain());
|
|
879
|
|
880 // reserved
|
|
881 writer->write_objectID(NULL);
|
|
882 writer->write_objectID(NULL);
|
|
883
|
|
884 // instance size
|
|
885 writer->write_u4(DumperSupport::instance_size(k));
|
|
886
|
|
887 // size of constant pool - ignored by HAT 1.1
|
|
888 writer->write_u2(0);
|
|
889
|
|
890 // number of static fields
|
|
891 dump_static_fields(writer, k);
|
|
892
|
|
893 // description of instance fields
|
|
894 dump_instance_field_descriptors(writer, k);
|
|
895
|
|
896 // array classes
|
|
897 k = klass->array_klass_or_null();
|
|
898 while (k != NULL) {
|
|
899 Klass* klass = Klass::cast(k);
|
|
900 assert(klass->oop_is_objArray(), "not an objArrayKlass");
|
|
901
|
|
902 writer->write_u1(HPROF_GC_CLASS_DUMP);
|
|
903 writer->write_classID(klass);
|
|
904 writer->write_u4(STACK_TRACE_ID);
|
|
905
|
|
906 // super class of array classes is java.lang.Object
|
|
907 java_super = klass->java_super();
|
|
908 assert(java_super != NULL, "checking");
|
|
909 writer->write_classID(Klass::cast(java_super));
|
|
910
|
|
911 writer->write_objectID(ik->class_loader());
|
|
912 writer->write_objectID(ik->signers());
|
|
913 writer->write_objectID(ik->protection_domain());
|
|
914
|
|
915 writer->write_objectID(NULL); // reserved
|
|
916 writer->write_objectID(NULL);
|
|
917 writer->write_u4(0); // instance size
|
|
918 writer->write_u2(0); // constant pool
|
|
919 writer->write_u2(0); // static fields
|
|
920 writer->write_u2(0); // instance fields
|
|
921
|
|
922 // get the array class for the next rank
|
|
923 k = klass->array_klass_or_null();
|
|
924 }
|
|
925 }
|
|
926
|
|
927 // creates HPROF_GC_CLASS_DUMP record for a given primitive array
|
|
928 // class (and each multi-dimensional array class too)
|
|
929 void DumperSupport::dump_basic_type_array_class(DumpWriter* writer, klassOop k) {
|
|
930 // array classes
|
|
931 while (k != NULL) {
|
|
932 Klass* klass = Klass::cast(k);
|
|
933
|
|
934 writer->write_u1(HPROF_GC_CLASS_DUMP);
|
|
935 writer->write_classID(klass);
|
|
936 writer->write_u4(STACK_TRACE_ID);
|
|
937
|
|
938 // super class of array classes is java.lang.Object
|
|
939 klassOop java_super = klass->java_super();
|
|
940 assert(java_super != NULL, "checking");
|
|
941 writer->write_classID(Klass::cast(java_super));
|
|
942
|
|
943 writer->write_objectID(NULL); // loader
|
|
944 writer->write_objectID(NULL); // signers
|
|
945 writer->write_objectID(NULL); // protection domain
|
|
946
|
|
947 writer->write_objectID(NULL); // reserved
|
|
948 writer->write_objectID(NULL);
|
|
949 writer->write_u4(0); // instance size
|
|
950 writer->write_u2(0); // constant pool
|
|
951 writer->write_u2(0); // static fields
|
|
952 writer->write_u2(0); // instance fields
|
|
953
|
|
954 // get the array class for the next rank
|
|
955 k = klass->array_klass_or_null();
|
|
956 }
|
|
957 }
|
|
958
|
|
959 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array
|
|
960 void DumperSupport::dump_object_array(DumpWriter* writer, objArrayOop array) {
|
|
961
|
|
962 // filter this
|
|
963 if (array->klass() == Universe::systemObjArrayKlassObj()) return;
|
|
964
|
|
965 writer->write_u1(HPROF_GC_OBJ_ARRAY_DUMP);
|
|
966 writer->write_objectID(array);
|
|
967 writer->write_u4(STACK_TRACE_ID);
|
|
968 writer->write_u4((u4)array->length());
|
|
969
|
|
970 // array class ID
|
|
971 writer->write_classID(Klass::cast(array->klass()));
|
|
972
|
|
973 // [id]* elements
|
|
974 for (int index=0; index<array->length(); index++) {
|
|
975 oop o = array->obj_at(index);
|
|
976 writer->write_objectID(o);
|
|
977 }
|
|
978 }
|
|
979
|
|
980 #define WRITE_ARRAY(Array, Type, Size) \
|
|
981 for (int i=0; i<Array->length(); i++) { writer->write_##Size((Size)array->Type##_at(i)); }
|
|
982
|
|
983
|
|
984 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array
|
|
985 void DumperSupport::dump_prim_array(DumpWriter* writer, typeArrayOop array) {
|
|
986 BasicType type = typeArrayKlass::cast(array->klass())->element_type();
|
|
987
|
|
988 writer->write_u1(HPROF_GC_PRIM_ARRAY_DUMP);
|
|
989 writer->write_objectID(array);
|
|
990 writer->write_u4(STACK_TRACE_ID);
|
|
991 writer->write_u4((u4)array->length());
|
|
992 writer->write_u1(type2tag(type));
|
|
993
|
|
994 // nothing to copy
|
|
995 if (array->length() == 0) {
|
|
996 return;
|
|
997 }
|
|
998
|
|
999 // If the byte ordering is big endian then we can copy most types directly
|
|
1000 int length_in_bytes = array->length() * type2aelembytes[type];
|
|
1001 assert(length_in_bytes > 0, "nothing to copy");
|
|
1002
|
|
1003 switch (type) {
|
|
1004 case T_INT : {
|
|
1005 if (Bytes::is_Java_byte_ordering_different()) {
|
|
1006 WRITE_ARRAY(array, int, u4);
|
|
1007 } else {
|
|
1008 writer->write_raw((void*)(array->int_at_addr(0)), length_in_bytes);
|
|
1009 }
|
|
1010 break;
|
|
1011 }
|
|
1012 case T_BYTE : {
|
|
1013 writer->write_raw((void*)(array->byte_at_addr(0)), length_in_bytes);
|
|
1014 break;
|
|
1015 }
|
|
1016 case T_CHAR : {
|
|
1017 if (Bytes::is_Java_byte_ordering_different()) {
|
|
1018 WRITE_ARRAY(array, char, u2);
|
|
1019 } else {
|
|
1020 writer->write_raw((void*)(array->char_at_addr(0)), length_in_bytes);
|
|
1021 }
|
|
1022 break;
|
|
1023 }
|
|
1024 case T_SHORT : {
|
|
1025 if (Bytes::is_Java_byte_ordering_different()) {
|
|
1026 WRITE_ARRAY(array, short, u2);
|
|
1027 } else {
|
|
1028 writer->write_raw((void*)(array->short_at_addr(0)), length_in_bytes);
|
|
1029 }
|
|
1030 break;
|
|
1031 }
|
|
1032 case T_BOOLEAN : {
|
|
1033 if (Bytes::is_Java_byte_ordering_different()) {
|
|
1034 WRITE_ARRAY(array, bool, u1);
|
|
1035 } else {
|
|
1036 writer->write_raw((void*)(array->bool_at_addr(0)), length_in_bytes);
|
|
1037 }
|
|
1038 break;
|
|
1039 }
|
|
1040 case T_LONG : {
|
|
1041 if (Bytes::is_Java_byte_ordering_different()) {
|
|
1042 WRITE_ARRAY(array, long, u8);
|
|
1043 } else {
|
|
1044 writer->write_raw((void*)(array->long_at_addr(0)), length_in_bytes);
|
|
1045 }
|
|
1046 break;
|
|
1047 }
|
|
1048
|
|
1049 // handle float/doubles in a special value to ensure than NaNs are
|
|
1050 // written correctly. TO DO: Check if we can avoid this on processors that
|
|
1051 // use IEEE 754.
|
|
1052
|
|
1053 case T_FLOAT : {
|
|
1054 for (int i=0; i<array->length(); i++) {
|
|
1055 dump_float( writer, array->float_at(i) );
|
|
1056 }
|
|
1057 break;
|
|
1058 }
|
|
1059 case T_DOUBLE : {
|
|
1060 for (int i=0; i<array->length(); i++) {
|
|
1061 dump_double( writer, array->double_at(i) );
|
|
1062 }
|
|
1063 break;
|
|
1064 }
|
|
1065 default : ShouldNotReachHere();
|
|
1066 }
|
|
1067 }
|
|
1068
|
|
1069
|
|
1070 // Support class used to generate HPROF_UTF8 records from the entries in the
|
|
1071 // SymbolTable.
|
|
1072
|
|
1073 class SymbolTableDumper : public OopClosure {
|
|
1074 private:
|
|
1075 DumpWriter* _writer;
|
|
1076 DumpWriter* writer() const { return _writer; }
|
|
1077 public:
|
|
1078 SymbolTableDumper(DumpWriter* writer) { _writer = writer; }
|
|
1079 void do_oop(oop* obj_p);
|
|
1080 };
|
|
1081
|
|
1082 void SymbolTableDumper::do_oop(oop* obj_p) {
|
|
1083 ResourceMark rm;
|
|
1084 symbolOop sym = (symbolOop)*obj_p;
|
|
1085
|
|
1086 int len = sym->utf8_length();
|
|
1087 if (len > 0) {
|
|
1088 char* s = sym->as_utf8();
|
|
1089 DumperSupport::write_header(writer(), HPROF_UTF8, oopSize + len);
|
|
1090 writer()->write_objectID(sym);
|
|
1091 writer()->write_raw(s, len);
|
|
1092 }
|
|
1093 }
|
|
1094
|
|
1095
|
|
1096 // Support class used to generate HPROF_GC_ROOT_JNI_LOCAL records
|
|
1097
|
|
1098 class JNILocalsDumper : public OopClosure {
|
|
1099 private:
|
|
1100 DumpWriter* _writer;
|
|
1101 u4 _thread_serial_num;
|
|
1102 DumpWriter* writer() const { return _writer; }
|
|
1103 public:
|
|
1104 JNILocalsDumper(DumpWriter* writer, u4 thread_serial_num) {
|
|
1105 _writer = writer;
|
|
1106 _thread_serial_num = thread_serial_num;
|
|
1107 }
|
|
1108 void do_oop(oop* obj_p);
|
|
1109 };
|
|
1110
|
|
1111
|
|
1112 void JNILocalsDumper::do_oop(oop* obj_p) {
|
|
1113 // ignore null or deleted handles
|
|
1114 oop o = *obj_p;
|
|
1115 if (o != NULL && o != JNIHandles::deleted_handle()) {
|
|
1116 writer()->write_u1(HPROF_GC_ROOT_JNI_LOCAL);
|
|
1117 writer()->write_objectID(o);
|
|
1118 writer()->write_u4(_thread_serial_num);
|
|
1119 writer()->write_u4((u4)-1); // empty
|
|
1120 }
|
|
1121 }
|
|
1122
|
|
1123
|
|
1124 // Support class used to generate HPROF_GC_ROOT_JNI_GLOBAL records
|
|
1125
|
|
1126 class JNIGlobalsDumper : public OopClosure {
|
|
1127 private:
|
|
1128 DumpWriter* _writer;
|
|
1129 DumpWriter* writer() const { return _writer; }
|
|
1130
|
|
1131 public:
|
|
1132 JNIGlobalsDumper(DumpWriter* writer) {
|
|
1133 _writer = writer;
|
|
1134 }
|
|
1135 void do_oop(oop* obj_p);
|
|
1136 };
|
|
1137
|
|
1138 void JNIGlobalsDumper::do_oop(oop* obj_p) {
|
|
1139 oop o = *obj_p;
|
|
1140
|
|
1141 // ignore these
|
|
1142 if (o == NULL || o == JNIHandles::deleted_handle()) return;
|
|
1143
|
|
1144 // we ignore global ref to symbols and other internal objects
|
|
1145 if (o->is_instance() || o->is_objArray() || o->is_typeArray()) {
|
|
1146 writer()->write_u1(HPROF_GC_ROOT_JNI_GLOBAL);
|
|
1147 writer()->write_objectID(o);
|
|
1148 writer()->write_objectID((oopDesc*)obj_p); // global ref ID
|
|
1149 }
|
|
1150 };
|
|
1151
|
|
1152
|
|
1153 // Support class used to generate HPROF_GC_ROOT_MONITOR_USED records
|
|
1154
|
|
1155 class MonitorUsedDumper : public OopClosure {
|
|
1156 private:
|
|
1157 DumpWriter* _writer;
|
|
1158 DumpWriter* writer() const { return _writer; }
|
|
1159 public:
|
|
1160 MonitorUsedDumper(DumpWriter* writer) {
|
|
1161 _writer = writer;
|
|
1162 }
|
|
1163 void do_oop(oop* obj_p) {
|
|
1164 writer()->write_u1(HPROF_GC_ROOT_MONITOR_USED);
|
|
1165 writer()->write_objectID(*obj_p);
|
|
1166 }
|
|
1167 };
|
|
1168
|
|
1169
|
|
1170 // Support class used to generate HPROF_GC_ROOT_STICKY_CLASS records
|
|
1171
|
|
1172 class StickyClassDumper : public OopClosure {
|
|
1173 private:
|
|
1174 DumpWriter* _writer;
|
|
1175 DumpWriter* writer() const { return _writer; }
|
|
1176 public:
|
|
1177 StickyClassDumper(DumpWriter* writer) {
|
|
1178 _writer = writer;
|
|
1179 }
|
|
1180 void do_oop(oop* obj_p);
|
|
1181 };
|
|
1182
|
|
1183 void StickyClassDumper::do_oop(oop* obj_p) {
|
|
1184 if (*obj_p != NULL) {
|
|
1185 oop o = *obj_p;
|
|
1186 if (o->is_klass()) {
|
|
1187 klassOop k = klassOop(o);
|
|
1188 if (Klass::cast(k)->oop_is_instance()) {
|
|
1189 instanceKlass* ik = instanceKlass::cast(k);
|
|
1190 writer()->write_u1(HPROF_GC_ROOT_STICKY_CLASS);
|
|
1191 writer()->write_classID(ik);
|
|
1192 }
|
|
1193 }
|
|
1194 }
|
|
1195 }
|
|
1196
|
|
1197
|
|
1198 class VM_HeapDumper;
|
|
1199
|
|
1200 // Support class using when iterating over the heap.
|
|
1201
|
|
1202 class HeapObjectDumper : public ObjectClosure {
|
|
1203 private:
|
|
1204 VM_HeapDumper* _dumper;
|
|
1205 DumpWriter* _writer;
|
|
1206
|
|
1207 VM_HeapDumper* dumper() { return _dumper; }
|
|
1208 DumpWriter* writer() { return _writer; }
|
|
1209
|
|
1210 // used to indicate that a record has been writen
|
|
1211 void mark_end_of_record();
|
|
1212
|
|
1213 public:
|
|
1214 HeapObjectDumper(VM_HeapDumper* dumper, DumpWriter* writer) {
|
|
1215 _dumper = dumper;
|
|
1216 _writer = writer;
|
|
1217 }
|
|
1218
|
|
1219 // called for each object in the heap
|
|
1220 void do_object(oop o);
|
|
1221 };
|
|
1222
|
|
1223 void HeapObjectDumper::do_object(oop o) {
|
|
1224 // hide the sentinel for deleted handles
|
|
1225 if (o == JNIHandles::deleted_handle()) return;
|
|
1226
|
|
1227 // ignore KlassKlass objects
|
|
1228 if (o->is_klass()) return;
|
|
1229
|
|
1230 // skip classes as these emitted as HPROF_GC_CLASS_DUMP records
|
|
1231 if (o->klass() == SystemDictionary::class_klass()) {
|
|
1232 if (!java_lang_Class::is_primitive(o)) {
|
|
1233 return;
|
|
1234 }
|
|
1235 }
|
|
1236
|
|
1237 // create a HPROF_GC_INSTANCE record for each object
|
|
1238 if (o->is_instance()) {
|
|
1239 DumperSupport::dump_instance(writer(), o);
|
|
1240 mark_end_of_record();
|
|
1241 } else {
|
|
1242 // create a HPROF_GC_OBJ_ARRAY_DUMP record for each object array
|
|
1243 if (o->is_objArray()) {
|
|
1244 DumperSupport::dump_object_array(writer(), objArrayOop(o));
|
|
1245 mark_end_of_record();
|
|
1246 } else {
|
|
1247 // create a HPROF_GC_PRIM_ARRAY_DUMP record for each type array
|
|
1248 if (o->is_typeArray()) {
|
|
1249 DumperSupport::dump_prim_array(writer(), typeArrayOop(o));
|
|
1250 mark_end_of_record();
|
|
1251 }
|
|
1252 }
|
|
1253 }
|
|
1254 }
|
|
1255
|
|
1256 // The VM operation that performs the heap dump
|
|
1257 class VM_HeapDumper : public VM_GC_Operation {
|
|
1258 private:
|
|
1259 DumpWriter* _writer;
|
|
1260 bool _gc_before_heap_dump;
|
|
1261 bool _is_segmented_dump;
|
|
1262 jlong _dump_start;
|
|
1263
|
|
1264 // accessors
|
|
1265 DumpWriter* writer() const { return _writer; }
|
|
1266 bool is_segmented_dump() const { return _is_segmented_dump; }
|
|
1267 void set_segmented_dump() { _is_segmented_dump = true; }
|
|
1268 jlong dump_start() const { return _dump_start; }
|
|
1269 void set_dump_start(jlong pos);
|
|
1270
|
|
1271 bool skip_operation() const;
|
|
1272
|
|
1273 // writes a HPROF_LOAD_CLASS record
|
|
1274 static void do_load_class(klassOop k);
|
|
1275
|
|
1276 // writes a HPROF_GC_CLASS_DUMP record for the given class
|
|
1277 // (and each array class too)
|
|
1278 static void do_class_dump(klassOop k);
|
|
1279
|
|
1280 // writes a HPROF_GC_CLASS_DUMP records for a given basic type
|
|
1281 // array (and each multi-dimensional array too)
|
|
1282 static void do_basic_type_array_class_dump(klassOop k);
|
|
1283
|
|
1284 // HPROF_GC_ROOT_THREAD_OBJ records
|
|
1285 void do_thread(JavaThread* thread, u4 thread_serial_num);
|
|
1286 void do_threads();
|
|
1287
|
|
1288 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record
|
|
1289 void write_dump_header();
|
|
1290
|
|
1291 // fixes up the length of the current dump record
|
|
1292 void write_current_dump_record_length();
|
|
1293
|
|
1294 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END
|
|
1295 // record in the case of a segmented heap dump)
|
|
1296 void end_of_dump();
|
|
1297
|
|
1298 public:
|
|
1299 VM_HeapDumper(DumpWriter* writer, bool gc_before_heap_dump) :
|
|
1300 VM_GC_Operation(0 /* total collections, dummy, ignored */,
|
|
1301 0 /* total full collections, dummy, ignored */,
|
|
1302 gc_before_heap_dump) {
|
|
1303 _writer = writer;
|
|
1304 _gc_before_heap_dump = gc_before_heap_dump;
|
|
1305 _is_segmented_dump = false;
|
|
1306 _dump_start = (jlong)-1;
|
|
1307 }
|
|
1308
|
|
1309 VMOp_Type type() const { return VMOp_HeapDumper; }
|
|
1310 // used to mark sub-record boundary
|
|
1311 void check_segment_length();
|
|
1312 void doit();
|
|
1313 };
|
|
1314
|
|
1315 bool VM_HeapDumper::skip_operation() const {
|
|
1316 return false;
|
|
1317 }
|
|
1318
|
|
1319 // sets the dump starting position
|
|
1320 void VM_HeapDumper::set_dump_start(jlong pos) {
|
|
1321 _dump_start = pos;
|
|
1322 }
|
|
1323
|
|
1324 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record
|
|
1325 void VM_HeapDumper::write_dump_header() {
|
|
1326 if (writer()->is_open()) {
|
|
1327 if (is_segmented_dump()) {
|
|
1328 writer()->write_u1(HPROF_HEAP_DUMP_SEGMENT);
|
|
1329 } else {
|
|
1330 writer()->write_u1(HPROF_HEAP_DUMP);
|
|
1331 }
|
|
1332 writer()->write_u4(0); // current ticks
|
|
1333
|
|
1334 // record the starting position for the dump (its length will be fixed up later)
|
|
1335 set_dump_start(writer()->current_offset());
|
|
1336 writer()->write_u4(0);
|
|
1337 }
|
|
1338 }
|
|
1339
|
|
1340 // fixes up the length of the current dump record
|
|
1341 void VM_HeapDumper::write_current_dump_record_length() {
|
|
1342 if (writer()->is_open()) {
|
|
1343 assert(dump_start() >= 0, "no dump start recorded");
|
|
1344
|
|
1345 // calculate the size of the dump record
|
|
1346 jlong dump_end = writer()->current_offset();
|
|
1347 jlong dump_len = (dump_end - dump_start() - 4);
|
|
1348
|
|
1349 // record length must fit in a u4
|
|
1350 if (dump_len > (jlong)(4L*(jlong)G)) {
|
|
1351 warning("record is too large");
|
|
1352 }
|
|
1353
|
|
1354 // seek to the dump start and fix-up the length
|
|
1355 writer()->seek_to_offset(dump_start());
|
|
1356 writer()->write_u4((u4)dump_len);
|
|
1357
|
|
1358 // adjust the total size written to keep the bytes written correct.
|
|
1359 writer()->adjust_bytes_written(-((long) sizeof(u4)));
|
|
1360
|
|
1361 // seek to dump end so we can continue
|
|
1362 writer()->seek_to_offset(dump_end);
|
|
1363
|
|
1364 // no current dump record
|
|
1365 set_dump_start((jlong)-1);
|
|
1366 }
|
|
1367 }
|
|
1368
|
|
1369 // used on a sub-record boundary to check if we need to start a
|
|
1370 // new segment.
|
|
1371 void VM_HeapDumper::check_segment_length() {
|
|
1372 if (writer()->is_open()) {
|
|
1373 if (is_segmented_dump()) {
|
|
1374 // don't use current_offset that would be too expensive on a per record basis
|
|
1375 jlong dump_end = writer()->bytes_written() + writer()->bytes_unwritten();
|
|
1376 assert(dump_end == writer()->current_offset(), "checking");
|
|
1377 jlong dump_len = (dump_end - dump_start() - 4);
|
|
1378 assert(dump_len >= 0 && dump_len <= max_juint, "bad dump length");
|
|
1379
|
|
1380 if (dump_len > (jlong)HeapDumpSegmentSize) {
|
|
1381 write_current_dump_record_length();
|
|
1382 write_dump_header();
|
|
1383 }
|
|
1384 }
|
|
1385 }
|
|
1386 }
|
|
1387
|
|
1388 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END
|
|
1389 // record in the case of a segmented heap dump)
|
|
1390 void VM_HeapDumper::end_of_dump() {
|
|
1391 if (writer()->is_open()) {
|
|
1392 write_current_dump_record_length();
|
|
1393
|
|
1394 // for segmented dump we write the end record
|
|
1395 if (is_segmented_dump()) {
|
|
1396 writer()->write_u1(HPROF_HEAP_DUMP_END);
|
|
1397 writer()->write_u4(0);
|
|
1398 writer()->write_u4(0);
|
|
1399 }
|
|
1400 }
|
|
1401 }
|
|
1402
|
|
1403 // marks sub-record boundary
|
|
1404 void HeapObjectDumper::mark_end_of_record() {
|
|
1405 dumper()->check_segment_length();
|
|
1406 }
|
|
1407
|
|
1408 // writes a HPROF_LOAD_CLASS record for the class (and each of its
|
|
1409 // array classes)
|
|
1410 void VM_HeapDumper::do_load_class(klassOop k) {
|
|
1411 static u4 class_serial_num = 0;
|
|
1412
|
|
1413 VM_HeapDumper* dumper = ((VM_HeapDumper*)VMThread::vm_operation());
|
|
1414 DumpWriter* writer = dumper->writer();
|
|
1415
|
|
1416 // len of HPROF_LOAD_CLASS record
|
|
1417 u4 remaining = 2*oopSize + 2*sizeof(u4);
|
|
1418
|
|
1419 // write a HPROF_LOAD_CLASS for the class and each array class
|
|
1420 do {
|
|
1421 DumperSupport::write_header(writer, HPROF_LOAD_CLASS, remaining);
|
|
1422
|
|
1423 // class serial number is just a number
|
|
1424 writer->write_u4(++class_serial_num);
|
|
1425
|
|
1426 // class ID
|
|
1427 Klass* klass = Klass::cast(k);
|
|
1428 writer->write_classID(klass);
|
|
1429
|
|
1430 writer->write_u4(STACK_TRACE_ID);
|
|
1431
|
|
1432 // class name ID
|
|
1433 symbolOop name = klass->name();
|
|
1434 writer->write_objectID(name);
|
|
1435
|
|
1436 // write a LOAD_CLASS record for the array type (if it exists)
|
|
1437 k = klass->array_klass_or_null();
|
|
1438 } while (k != NULL);
|
|
1439 }
|
|
1440
|
|
1441 // writes a HPROF_GC_CLASS_DUMP record for the given class
|
|
1442 void VM_HeapDumper::do_class_dump(klassOop k) {
|
|
1443 VM_HeapDumper* dumper = ((VM_HeapDumper*)VMThread::vm_operation());
|
|
1444 DumpWriter* writer = dumper->writer();
|
|
1445 DumperSupport::dump_class_and_array_classes(writer, k);
|
|
1446 }
|
|
1447
|
|
1448 // writes a HPROF_GC_CLASS_DUMP records for a given basic type
|
|
1449 // array (and each multi-dimensional array too)
|
|
1450 void VM_HeapDumper::do_basic_type_array_class_dump(klassOop k) {
|
|
1451 VM_HeapDumper* dumper = ((VM_HeapDumper*)VMThread::vm_operation());
|
|
1452 DumpWriter* writer = dumper->writer();
|
|
1453 DumperSupport::dump_basic_type_array_class(writer, k);
|
|
1454 }
|
|
1455
|
|
1456 // Walk the stack of the given thread.
|
|
1457 // Dumps a HPROF_GC_ROOT_JAVA_FRAME record for each local
|
|
1458 // Dumps a HPROF_GC_ROOT_JNI_LOCAL record for each JNI local
|
|
1459 void VM_HeapDumper::do_thread(JavaThread* java_thread, u4 thread_serial_num) {
|
|
1460 JNILocalsDumper blk(writer(), thread_serial_num);
|
|
1461
|
|
1462 oop threadObj = java_thread->threadObj();
|
|
1463 assert(threadObj != NULL, "sanity check");
|
|
1464
|
|
1465 // JNI locals for the top frame
|
|
1466 java_thread->active_handles()->oops_do(&blk);
|
|
1467
|
|
1468 if (java_thread->has_last_Java_frame()) {
|
|
1469
|
|
1470 // vframes are resource allocated
|
|
1471 Thread* current_thread = Thread::current();
|
|
1472 ResourceMark rm(current_thread);
|
|
1473 HandleMark hm(current_thread);
|
|
1474
|
|
1475 RegisterMap reg_map(java_thread);
|
|
1476 frame f = java_thread->last_frame();
|
|
1477 vframe* vf = vframe::new_vframe(&f, ®_map, java_thread);
|
|
1478
|
|
1479 while (vf != NULL) {
|
|
1480 if (vf->is_java_frame()) {
|
|
1481
|
|
1482 // java frame (interpreted, compiled, ...)
|
|
1483 javaVFrame *jvf = javaVFrame::cast(vf);
|
|
1484
|
|
1485 if (!(jvf->method()->is_native())) {
|
|
1486 StackValueCollection* locals = jvf->locals();
|
|
1487 for (int slot=0; slot<locals->size(); slot++) {
|
|
1488 if (locals->at(slot)->type() == T_OBJECT) {
|
|
1489 oop o = locals->obj_at(slot)();
|
|
1490
|
|
1491 if (o != NULL) {
|
|
1492 writer()->write_u1(HPROF_GC_ROOT_JAVA_FRAME);
|
|
1493 writer()->write_objectID(o);
|
|
1494 writer()->write_u4(thread_serial_num);
|
|
1495 writer()->write_u4((u4)-1); // empty
|
|
1496 }
|
|
1497 }
|
|
1498 }
|
|
1499 }
|
|
1500 } else {
|
|
1501
|
|
1502 // externalVFrame - if it's an entry frame then report any JNI locals
|
|
1503 // as roots
|
|
1504 frame* fr = vf->frame_pointer();
|
|
1505 assert(fr != NULL, "sanity check");
|
|
1506 if (fr->is_entry_frame()) {
|
|
1507 fr->entry_frame_call_wrapper()->handles()->oops_do(&blk);
|
|
1508 }
|
|
1509 }
|
|
1510
|
|
1511 vf = vf->sender();
|
|
1512 }
|
|
1513 }
|
|
1514 }
|
|
1515
|
|
1516
|
|
1517 // write a HPROF_GC_ROOT_THREAD_OBJ record for each java thread. Then walk
|
|
1518 // the stack so that locals and JNI locals are dumped.
|
|
1519 void VM_HeapDumper::do_threads() {
|
|
1520 u4 thread_serial_num = 0;
|
|
1521 for (JavaThread* thread = Threads::first(); thread != NULL ; thread = thread->next()) {
|
|
1522 oop threadObj = thread->threadObj();
|
|
1523 if (threadObj != NULL && !thread->is_exiting() && !thread->is_hidden_from_external_view()) {
|
|
1524 ++thread_serial_num;
|
|
1525
|
|
1526 writer()->write_u1(HPROF_GC_ROOT_THREAD_OBJ);
|
|
1527 writer()->write_objectID(threadObj);
|
|
1528 writer()->write_u4(thread_serial_num);
|
|
1529 writer()->write_u4(STACK_TRACE_ID);
|
|
1530
|
|
1531 do_thread(thread, thread_serial_num);
|
|
1532 }
|
|
1533 }
|
|
1534 }
|
|
1535
|
|
1536
|
|
1537 // The VM operation that dumps the heap. The dump consists of the following
|
|
1538 // records:
|
|
1539 //
|
|
1540 // HPROF_HEADER
|
|
1541 // HPROF_TRACE
|
|
1542 // [HPROF_UTF8]*
|
|
1543 // [HPROF_LOAD_CLASS]*
|
|
1544 // [HPROF_GC_CLASS_DUMP]*
|
|
1545 // HPROF_HEAP_DUMP
|
|
1546 //
|
|
1547 // The HPROF_TRACE record after the header is "dummy trace" record which does
|
|
1548 // not include any frames. Other records which require a stack trace ID will
|
|
1549 // specify the trace ID of this record (1). It also means we can run HAT without
|
|
1550 // needing the -stack false option.
|
|
1551 //
|
|
1552 // The HPROF_HEAP_DUMP record has a length following by sub-records. To allow
|
|
1553 // the heap dump be generated in a single pass we remember the position of
|
|
1554 // the dump length and fix it up after all sub-records have been written.
|
|
1555 // To generate the sub-records we iterate over the heap, writing
|
|
1556 // HPROF_GC_INSTANCE_DUMP, HPROF_GC_OBJ_ARRAY_DUMP, and HPROF_GC_PRIM_ARRAY_DUMP
|
|
1557 // records as we go. Once that is done we write records for some of the GC
|
|
1558 // roots.
|
|
1559
|
|
1560 void VM_HeapDumper::doit() {
|
|
1561
|
|
1562 HandleMark hm;
|
|
1563 CollectedHeap* ch = Universe::heap();
|
|
1564 if (_gc_before_heap_dump) {
|
|
1565 ch->collect_as_vm_thread(GCCause::_heap_dump);
|
|
1566 } else {
|
|
1567 // make the heap parsable (no need to retire TLABs)
|
|
1568 ch->ensure_parsability(false);
|
|
1569 }
|
|
1570
|
|
1571 // Write the file header - use 1.0.2 for large heaps, otherwise 1.0.1
|
|
1572 size_t used;
|
|
1573 const char* header;
|
|
1574 #ifndef SERIALGC
|
|
1575 if (Universe::heap()->kind() == CollectedHeap::GenCollectedHeap) {
|
|
1576 used = GenCollectedHeap::heap()->used();
|
|
1577 } else {
|
|
1578 used = ParallelScavengeHeap::heap()->used();
|
|
1579 }
|
|
1580 #else // SERIALGC
|
|
1581 used = GenCollectedHeap::heap()->used();
|
|
1582 #endif // SERIALGC
|
|
1583 if (used > (size_t)SegmentedHeapDumpThreshold) {
|
|
1584 set_segmented_dump();
|
|
1585 header = "JAVA PROFILE 1.0.2";
|
|
1586 } else {
|
|
1587 header = "JAVA PROFILE 1.0.1";
|
|
1588 }
|
|
1589 // header is few bytes long - no chance to overflow int
|
|
1590 writer()->write_raw((void*)header, (int)strlen(header));
|
|
1591 writer()->write_u1(0); // terminator
|
|
1592 writer()->write_u4(oopSize);
|
|
1593 writer()->write_u8(os::javaTimeMillis());
|
|
1594
|
|
1595 // HPROF_TRACE record without any frames
|
|
1596 DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4));
|
|
1597 writer()->write_u4(STACK_TRACE_ID);
|
|
1598 writer()->write_u4(0); // thread number
|
|
1599 writer()->write_u4(0); // frame count
|
|
1600
|
|
1601 // HPROF_UTF8 records
|
|
1602 SymbolTableDumper sym_dumper(writer());
|
|
1603 SymbolTable::oops_do(&sym_dumper);
|
|
1604
|
|
1605 // write HPROF_LOAD_CLASS records
|
|
1606 SystemDictionary::classes_do(&do_load_class);
|
|
1607 Universe::basic_type_classes_do(&do_load_class);
|
|
1608
|
|
1609 // write HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT
|
|
1610 write_dump_header();
|
|
1611
|
|
1612 // Writes HPROF_GC_CLASS_DUMP records
|
|
1613 SystemDictionary::classes_do(&do_class_dump);
|
|
1614 Universe::basic_type_classes_do(&do_basic_type_array_class_dump);
|
|
1615 check_segment_length();
|
|
1616
|
|
1617 // writes HPROF_GC_INSTANCE_DUMP records.
|
|
1618 // After each sub-record is written check_segment_length will be invoked. When
|
|
1619 // generated a segmented heap dump this allows us to check if the current
|
|
1620 // segment exceeds a threshold and if so, then a new segment is started.
|
|
1621 // The HPROF_GC_CLASS_DUMP and HPROF_GC_INSTANCE_DUMP are the vast bulk
|
|
1622 // of the heap dump.
|
|
1623 HeapObjectDumper obj_dumper(this, writer());
|
|
1624 Universe::heap()->object_iterate(&obj_dumper);
|
|
1625
|
|
1626 // HPROF_GC_ROOT_THREAD_OBJ + frames + jni locals
|
|
1627 do_threads();
|
|
1628 check_segment_length();
|
|
1629
|
|
1630 // HPROF_GC_ROOT_MONITOR_USED
|
|
1631 MonitorUsedDumper mon_dumper(writer());
|
|
1632 ObjectSynchronizer::oops_do(&mon_dumper);
|
|
1633 check_segment_length();
|
|
1634
|
|
1635 // HPROF_GC_ROOT_JNI_GLOBAL
|
|
1636 JNIGlobalsDumper jni_dumper(writer());
|
|
1637 JNIHandles::oops_do(&jni_dumper);
|
|
1638 check_segment_length();
|
|
1639
|
|
1640 // HPROF_GC_ROOT_STICKY_CLASS
|
|
1641 StickyClassDumper class_dumper(writer());
|
|
1642 SystemDictionary::always_strong_oops_do(&class_dumper);
|
|
1643
|
|
1644 // fixes up the length of the dump record. In the case of a segmented
|
|
1645 // heap then the HPROF_HEAP_DUMP_END record is also written.
|
|
1646 end_of_dump();
|
|
1647 }
|
|
1648
|
|
1649
|
|
1650 // dump the heap to given path.
|
|
1651 int HeapDumper::dump(const char* path) {
|
|
1652 assert(path != NULL && strlen(path) > 0, "path missing");
|
|
1653
|
|
1654 // print message in interactive case
|
|
1655 if (print_to_tty()) {
|
|
1656 tty->print_cr("Dumping heap to %s ...", path);
|
|
1657 timer()->start();
|
|
1658 }
|
|
1659
|
|
1660 // create the dump writer. If the file can be opened then bail
|
|
1661 DumpWriter writer(path);
|
|
1662 if (!writer.is_open()) {
|
|
1663 set_error(writer.error());
|
|
1664 if (print_to_tty()) {
|
|
1665 tty->print_cr("Unable to create %s: %s", path,
|
|
1666 (error() != NULL) ? error() : "reason unknown");
|
|
1667 }
|
|
1668 return -1;
|
|
1669 }
|
|
1670
|
|
1671 // generate the dump
|
|
1672 VM_HeapDumper dumper(&writer, _gc_before_heap_dump);
|
|
1673 VMThread::execute(&dumper);
|
|
1674
|
|
1675 // close dump file and record any error that the writer may have encountered
|
|
1676 writer.close();
|
|
1677 set_error(writer.error());
|
|
1678
|
|
1679 // print message in interactive case
|
|
1680 if (print_to_tty()) {
|
|
1681 timer()->stop();
|
|
1682 if (error() == NULL) {
|
|
1683 char msg[256];
|
|
1684 sprintf(msg, "Heap dump file created [%s bytes in %3.3f secs]",
|
|
1685 os::jlong_format_specifier(), timer()->seconds());
|
|
1686 tty->print_cr(msg, writer.bytes_written());
|
|
1687 } else {
|
|
1688 tty->print_cr("Dump file is incomplete: %s", writer.error());
|
|
1689 }
|
|
1690 }
|
|
1691
|
|
1692 return (writer.error() == NULL) ? 0 : -1;
|
|
1693 }
|
|
1694
|
|
1695 // stop timer (if still active), and free any error string we might be holding
|
|
1696 HeapDumper::~HeapDumper() {
|
|
1697 if (timer()->is_active()) {
|
|
1698 timer()->stop();
|
|
1699 }
|
|
1700 set_error(NULL);
|
|
1701 }
|
|
1702
|
|
1703
|
|
1704 // returns the error string (resource allocated), or NULL
|
|
1705 char* HeapDumper::error_as_C_string() const {
|
|
1706 if (error() != NULL) {
|
|
1707 char* str = NEW_RESOURCE_ARRAY(char, strlen(error())+1);
|
|
1708 strcpy(str, error());
|
|
1709 return str;
|
|
1710 } else {
|
|
1711 return NULL;
|
|
1712 }
|
|
1713 }
|
|
1714
|
|
1715 // set the error string
|
|
1716 void HeapDumper::set_error(char* error) {
|
|
1717 if (_error != NULL) {
|
|
1718 os::free(_error);
|
|
1719 }
|
|
1720 if (error == NULL) {
|
|
1721 _error = NULL;
|
|
1722 } else {
|
|
1723 _error = os::strdup(error);
|
|
1724 assert(_error != NULL, "allocation failure");
|
|
1725 }
|
|
1726 }
|
|
1727
|
|
1728
|
|
1729 // Called by error reporting
|
|
1730 void HeapDumper::dump_heap() {
|
|
1731 static char path[JVM_MAXPATHLEN];
|
|
1732
|
|
1733 // The dump file defaults to java_pid<pid>.hprof in the current working
|
|
1734 // directory. HeapDumpPath=<file> can be used to specify an alternative
|
|
1735 // dump file name or a directory where dump file is created.
|
|
1736 bool use_default_filename = true;
|
|
1737 if (HeapDumpPath == NULL || HeapDumpPath[0] == '\0') {
|
|
1738 path[0] = '\0'; // HeapDumpPath=<file> not specified
|
|
1739 } else {
|
|
1740 assert(strlen(HeapDumpPath) < sizeof(path), "HeapDumpPath too long");
|
|
1741 strcpy(path, HeapDumpPath);
|
|
1742 // check if the path is a directory (must exist)
|
|
1743 DIR* dir = os::opendir(path);
|
|
1744 if (dir == NULL) {
|
|
1745 use_default_filename = false;
|
|
1746 } else {
|
|
1747 // HeapDumpPath specified a directory. We append a file separator
|
|
1748 // (if needed).
|
|
1749 os::closedir(dir);
|
|
1750 size_t fs_len = strlen(os::file_separator());
|
|
1751 if (strlen(path) >= fs_len) {
|
|
1752 char* end = path;
|
|
1753 end += (strlen(path) - fs_len);
|
|
1754 if (strcmp(end, os::file_separator()) != 0) {
|
|
1755 assert(strlen(path) + strlen(os::file_separator()) < sizeof(path),
|
|
1756 "HeapDumpPath too long");
|
|
1757 strcat(path, os::file_separator());
|
|
1758 }
|
|
1759 }
|
|
1760 }
|
|
1761 }
|
|
1762 // If HeapDumpPath wasn't a file name then we append the default name
|
|
1763 if (use_default_filename) {
|
|
1764 char fn[32];
|
|
1765 sprintf(fn, "java_pid%d.hprof", os::current_process_id());
|
|
1766 assert(strlen(path) + strlen(fn) < sizeof(path), "HeapDumpPath too long");
|
|
1767 strcat(path, fn);
|
|
1768 }
|
|
1769
|
|
1770 HeapDumper dumper(false /* no GC before heap dump */,
|
|
1771 true /* send to tty */);
|
|
1772 dumper.dump(path);
|
|
1773 }
|