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4 <meta content="deepa viswanathan" name="Author"> |
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7 <title>HPROF Agent</title> |
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8 <meta name="author" content="Kelly O'Hair"> |
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11 vlink="#551a8b"> |
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12 <h1 style="text-align: center;"><a name="mozTocId137594" |
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13 class="mozTocH1"></a><span style="font-weight: bold;"></span>HPROF |
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14 Agent<br> |
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15 </h1> |
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16 <h2><a name="mozTocId558923" class="mozTocH2"></a>Contents</h2> |
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17 <span style="text-decoration: underline;"></span> |
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18 <ol id="mozToc"> |
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19 <!--mozToc h1 1 h2 2 h3 3 h4 4 h5 5 h6 6--><li><a href="#mozTocId137594">HPROF |
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20 Agent</a> |
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21 <ol> |
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22 <li><a href="#mozTocId558923">Contents</a></li> |
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23 <li><a href="#mozTocId550204">Overview</a></li> |
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24 <li><a href="#mozTocId634758">Start-up</a></li> |
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25 <li><a href="#mozTocId708821">Heap Allocation |
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26 Profiles (heap=sites) </a></li> |
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27 <li><a href="#mozTocId634725">Heap Dump (heap=dump)</a></li> |
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28 <li><a href="#mozTocId546448">CPU Usage Sampling |
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29 Profiles (cpu=samples) </a></li> |
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30 <li><a href="#mozTocId116568">CPU Usage Times Profile (cpu=times) |
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31 </a></li> |
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32 <li><a href="#mozTocId848088">Binary Dump Format |
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33 (format=b)</a> |
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34 <ol> |
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35 <li><a href="#mozTocId348369">Socket Connection and |
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36 Communication</a></li> |
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37 </ol> |
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38 <ol> |
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39 <li><a href="#mozTocId348360">Handling of Arrays</a></li> |
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40 </ol> |
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41 </li> |
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42 <li><a href="#mozTocId589424">Source Code </a></li> |
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43 </ol> |
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44 </li> |
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45 </ol> |
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46 <span style="text-decoration: underline;"></span> |
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47 <h2><a name="mozTocId550204" class="mozTocH2"></a>Overview</h2> |
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48 <p>This document describes the JVM TI Agent HPROF delivered in |
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49 the Java Development Kit (JDK). It is intended as demonstration code |
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50 for JVM TI, and as a functional |
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51 replacement for the older HPROF JVMPI Agent delivered in past releases.<br> |
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52 </p> |
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53 Previous 1.4 and earlier releases of the JDK contained an HPROF |
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54 agent built on the experimental JVMPI. |
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55 The newer JVM TI replaces both JVMDI and JVMPI. |
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56 <p><span style="font-weight: bold;">Note</span>: Differences between |
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57 this HPROF implementation and the older JVMPI based HPROF are marked in |
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58 <span style="font-style: italic; color: rgb(255, 0, 0);">RED ITALICS</span> |
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59 throughout this document.<br> |
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60 </p> |
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61 <br> |
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62 <h2><a name="mozTocId634758" class="mozTocH3"></a>Start-up</h2> |
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63 <p>HPROF is a simple profiler agent shipped with the JDK. It is |
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64 a dynamically-linked |
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65 library that interacts with the JVM TI and |
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66 writes out profiling |
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67 information either to a file or to a socket in ascii or binary format. |
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68 This information can |
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69 be further processed by a profiler front-end tool.</p> |
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70 <p>It is capable of presenting CPU usage, heap allocation statistics |
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71 and monitor contention |
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72 profiles. In addition it can also report complete heap dumps and states |
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73 of all the monitors and threads in the Java virtual machine. |
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74 </p> |
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75 <p>HPROF can be invoked by: |
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76 </p> |
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77 <pre>java -<span style="font-weight: bold;">agentlib:</span><b>hprof</b> ToBeProfiledClass</pre> |
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78 Depending on the type of profiling requested, HPROF instructs the |
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79 virtual machine to send it the relevant JVM TI events and processes |
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80 the event data into profiling information. For example, the following |
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81 command obtains the heap allocation profile: |
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82 <pre>java -agentlib:hprof=heap=sites ToBeProfiledClass</pre> |
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83 Following is the complete list of options that can passed to hprof : |
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84 <blockquote> |
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85 <pre>java -agentlib:hprof=help<br><br> HPROF: Heap and CPU Profiling Agent (JVMTI Demonstration Code)<br><br>hprof usage: java -agentlib:hprof=[help]|[<option>=<value>, ...]<br><br>Option Name and Value Description Default<br>--------------------- ----------- -------<br>heap=dump|sites|all heap profiling all<br>cpu=samples|times|old CPU usage off<br>monitor=y|n monitor contention n<br>format=a|b text(txt) or binary output a<br>file=<file> write data to file java.hprof[{.txt}]<br>net=<host>:<port> send data over a socket off<br>depth=<size> stack trace depth 4<br>interval=<ms> sample interval in ms 10<br>cutoff=<value> output cutoff point 0.0001<br>lineno=y|n line number in traces? y<br>thread=y|n thread in traces? n<br>doe=y|n dump on exit? y<br>msa=y|n Solaris micro state accounting n<br>force=y|n force output to <file> y<br>verbose=y|n print messages about dumps y<br><br>Obsolete Options<br>----------------<br>gc_okay=y|n<br><br>Examples<br>--------<br> - Get sample cpu information every 20 millisec, with a stack depth of 3:<br> java -agentlib:hprof=cpu=samples,interval=20,depth=3 classname<br> - Get heap usage information based on the allocation sites:<br> java -agentlib:hprof=heap=sites classname<br><br>Notes<br>-----<br> - The option format=b cannot be used with monitor=y.<br> - The option format=b cannot be used with cpu=old|times.<br> - Use of the -Xrunhprof interface can still be used, e.g.<br> java -Xrunhprof:[help]|[<option>=<value>, ...]<br> will behave exactly the same as:<br> java -agentlib:hprof=[help]|[<option>=<value>, ...]<br><br>Warnings<br>--------<br> - This is demonstration code for the JVMTI interface and use of BCI,<br> it is not an official product or formal part of the JDK.<br> - The -Xrunhprof interface will be removed in a future release.<br> - The option format=b is considered experimental, this format may change<br> in a future release.<br></pre> |
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86 </blockquote> |
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87 <p>By default, heap profiling information (sites and dump) is written |
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88 out |
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89 to java.hprof.txt (ascii). |
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90 The monitor=y|n option has proven to be problematic and may be replaced |
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91 with something more useful.<br> |
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92 </p> |
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93 <p>The output in most cases will contain ID's for traces, threads, |
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94 objects, etc. Each type of ID will typically start with a |
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95 different number than the other ID's, e.g. traces might start with |
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96 300000.<br> |
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97 </p> |
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98 <p><span style="font-weight: bold;">Note</span>: <span |
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99 style="font-style: italic; color: rgb(255, 0, 0);">The gc_okay option |
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100 is no longer supported.</span><br> |
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101 </p> |
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102 <h2><a name="mozTocId708821" class="mozTocH4"></a>Heap Allocation |
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103 Profiles (heap=sites)<br> |
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104 </h2> |
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105 Following is the heap allocation profile generated by running the Java |
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106 compiler |
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107 (<code>javac</code>) on a set of input files. Only parts of the |
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108 profiler output are shown here. |
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109 <p></p> |
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110 <pre>Command used: javac -J-agentlib:hprof=heap=sites Hello.java<br><br>SITES BEGIN (ordered by live bytes) Fri Feb 6 13:13:42 2004<br> percent live alloc'ed stack class<br> rank self accum bytes objs bytes objs trace name<br> 1 44.13% 44.13% 1117360 13967 1117360 13967 301926 java.util.zip.ZipEntry<br> 2 8.83% 52.95% 223472 13967 223472 13967 301927 com.sun.tools.javac.util.List<br> 3 5.18% 58.13% 131088 1 131088 1 300996 byte[]<br> 4 5.18% 63.31% 131088 1 131088 1 300995 com.sun.tools.javac.util.Name[]<br> <br></pre> |
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111 A crucial piece of information in heap profile is the amount of |
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112 allocation that occurs |
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113 in various parts of the program. The <code>SITES</code> record above |
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114 tells us that 44.13% of the total space was allocated for |
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115 java.util.zip.ZipEntry objects. Note that the amount of live data is |
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116 only a fraction |
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117 of the total allocation that has occurred at a given site; the rest has |
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118 been garbage collected. |
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119 <p>A good way to relate allocation sites to the source code is to |
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120 record |
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121 the dynamic stack traces that led to the heap allocation. Following is |
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122 another part of the profiler output that illustrates the stack traces |
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123 referred to by the four allocation sites in output shown above. |
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124 <span style="font-family: monospace;"><br> |
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125 </span></p> |
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126 <pre><span style="font-family: monospace;"></span>TRACE 301926:<br> java.util.zip.ZipEntry.<init>(ZipEntry.java:101)<br> java.util.zip.ZipFile+3.nextElement(ZipFile.java:417)<br> com.sun.tools.javac.jvm.ClassReader.openArchive(ClassReader.java:1374)<br> com.sun.tools.javac.jvm.ClassReader.list(ClassReader.java:1631)<br><br>TRACE 301927:<br> com.sun.tools.javac.util.List.<init>(List.java:42)<br> com.sun.tools.javac.util.List.<init>(List.java:50)<br> com.sun.tools.javac.util.ListBuffer.append(ListBuffer.java:94)<br> com.sun.tools.javac.jvm.ClassReader.openArchive(ClassReader.java:1374)<br><br>TRACE 300996:<br> com.sun.tools.javac.util.Name$Table.<init>(Name.java:379)<br> com.sun.tools.javac.util.Name$Table.<init>(Name.java:481)<br> com.sun.tools.javac.util.Name$Table.make(Name.java:332)<br> com.sun.tools.javac.util.Name$Table.instance(Name.java:349)<br><br>TRACE 300995:<br> com.sun.tools.javac.util.Name$Table.<init>(Name.java:378)<br> com.sun.tools.javac.util.Name$Table.<init>(Name.java:481)<br> com.sun.tools.javac.util.Name$Table.make(Name.java:332)<br> com.sun.tools.javac.util.Name$Table.instance(Name.java:349)<init><init><init><br></init></init></init></pre> |
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127 <blockquote></blockquote> |
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128 <p> |
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129 Each frame in the stack trace contains class name, method name, source |
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130 file name, and the line number. The user can set the maximum number |
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131 of frames collected by the HPROF agent. The default limit is 4. Stack |
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132 traces reveal not only which methods performed heap allocation, but |
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133 also which methods were ultimately responsible for making calls that |
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134 resulted in memory allocation. <br> |
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135 </p> |
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136 <h2><a name="mozTocId634725" class="mozTocH2"></a>Heap Dump (heap=dump)</h2> |
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137 A complete dump of the current live objects in the heap can be obtained |
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138 with:<br> |
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139 <pre>Command used: javac -J-agentlib:hprof=heap=dump Hello.java<br></pre> |
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140 This is a very large output file, but can be viewed and searched in any |
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141 editor.<br> |
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142 <br> |
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143 <h2><a name="mozTocId546448" class="mozTocH4"></a>CPU Usage Sampling |
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144 Profiles (cpu=samples)<br> |
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145 </h2> |
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146 HPROF can collect CPU usage information by sampling threads. Following |
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147 is part of the output collected from a run |
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148 of the <code>javac</code> compiler. |
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149 <p></p> |
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150 <pre>Command used: javac -J-agentlib:hprof=cpu=samples Hello.java<br><br>CPU SAMPLES BEGIN (total = 462) Fri Feb 6 13:33:07 2004<br>rank self accum count trace method<br> 1 49.57% 49.57% 229 300187 java.util.zip.ZipFile.getNextEntry<br> 2 6.93% 56.49% 32 300190 java.util.zip.ZipEntry.initFields<br> 3 4.76% 61.26% 22 300122 java.lang.ClassLoader.defineClass2<br> 4 2.81% 64.07% 13 300188 java.util.zip.ZipFile.freeEntry<br> 5 1.95% 66.02% 9 300129 java.util.Vector.addElement<br> 6 1.73% 67.75% 8 300124 java.util.zip.ZipFile.getEntry<br> 7 1.52% 69.26% 7 300125 java.lang.ClassLoader.findBootstrapClass<br> 8 0.87% 70.13% 4 300172 com.sun.tools.javac.main.JavaCompiler.<init><br> 9 0.65% 70.78% 3 300030 java.util.zip.ZipFile.open<br> 10 0.65% 71.43% 3 300175 com.sun.tools.javac.main.JavaCompiler.<init><br><init> |
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151 ... |
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152 CPU SAMPLES END |
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153 </init></pre> |
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154 <blockquote> |
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155 </blockquote> |
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156 <p> |
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157 The HPROF agent periodically samples the stack of all running threads |
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158 to record the most frequently active stack traces. The <code>count</code> |
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159 field above indicates how many times a particular stack trace was found |
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160 to be active. These stack traces correspond to the CPU usage hot spots |
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161 in the application.<br> |
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162 </p> |
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163 <h2><a name="mozTocId116568" class="mozTocH2"></a>CPU Usage Times |
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164 Profile (cpu=times)<br> |
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165 </h2> |
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166 HPROF can collect CPU usage information by injecting code into every |
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167 method entry and exit, keeping track of exact method call counts and |
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168 the time spent in each method. This uses Byte Code Injection (BCI) and |
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169 runs considerably slower than cpu=samples. Following is part of the |
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170 output collected from a run |
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171 of the <code>javac</code> compiler. |
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172 <p></p> |
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173 <pre>Command used: javac -J-agentlib:hprof=cpu=times Hello.java<br><br>CPU TIME (ms) BEGIN (total = 2082665289) Fri Feb 6 13:43:42 2004<br>rank self accum count trace method<br> 1 3.70% 3.70% 1 311243 com.sun.tools.javac.Main.compile<br> 2 3.64% 7.34% 1 311242 com.sun.tools.javac.main.Main.compile<br> 3 3.64% 10.97% 1 311241 com.sun.tools.javac.main.Main.compile<br> 4 3.11% 14.08% 1 311173 com.sun.tools.javac.main.JavaCompiler.compile<br> 5 2.54% 16.62% 8 306183 com.sun.tools.javac.jvm.ClassReader.listAll<br> 6 2.53% 19.15% 36 306182 com.sun.tools.javac.jvm.ClassReader.list<br> 7 2.03% 21.18% 1 307195 com.sun.tools.javac.comp.Enter.main<br> 8 2.03% 23.21% 1 307194 com.sun.tools.javac.comp.Enter.complete<br> 9 1.68% 24.90% 1 306392 com.sun.tools.javac.comp.Enter.classEnter<br> 10 1.68% 26.58% 1 306388 com.sun.tools.javac.comp.Enter.classEnter<br><br>...<br>CPU TIME (ms) END</pre> |
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174 Here the count represents the true count of the times this method was |
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175 entered, and the percentages represent a measure of thread CPU time |
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176 spent in those methods.<br> |
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177 <br> |
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178 <h2><a class="mozTocH3" name="mozTocId848088"></a>Binary Dump Format |
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179 (format=b)</h2> |
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180 The basic fields in the binary output are u1 (1 byte), u2 (2 byte), u4 |
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181 (4 byte), and u8 (8 byte). An ID in this implementation is a u4, |
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182 however the size of an ID is really determined by the "size of |
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183 identifiers" field in the header.<br> |
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184 <br> |
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185 <span style="font-weight: bold;">WARNING</span>: This format is still |
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186 considered highly experimental, however, all attempts were made to |
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187 match the format of past HPROF implementations.<br> |
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188 <br> |
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189 The binary output begins with the information:<br> |
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190 <br> |
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191 <table style="text-align: left; width: 100%; height: 124px;" border="1" |
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192 cellpadding="2" cellspacing="2"> |
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193 <tbody> |
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194 <tr> |
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195 <td style="vertical-align: top;">[u1]*<br> |
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196 </td> |
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197 <td style="vertical-align: top;">An initial NULL terminated |
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198 series of bytes representing the format name and version, in this |
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199 implementation and historically, the string "JAVA PROFILE 1.0.1" (18 |
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200 u1 bytes) followed by a NULL byte. If the TAG "HEAP DUMP SEGMENT" is |
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201 used this string will be "JAVA PROFILE 1.0.2". </td> |
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202 </tr> |
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203 <tr> |
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204 <td style="vertical-align: top;">u4<br> |
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205 </td> |
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206 <td style="vertical-align: top;">size of identifiers. Identifiers |
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207 are used to represent UTF8 strings, objects, stack traces, etc. They |
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208 can have the same size as host pointers or sizeof(void*), but are not |
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209 required to be.<span style="color: rgb(0, 0, 0);"></span></td> |
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210 </tr> |
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211 <tr> |
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212 <td style="vertical-align: top;">u4<br> |
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213 </td> |
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214 <td style="vertical-align: top;">high word of number of |
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215 milliseconds since 0:00 GMT, 1/1/70</td> |
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216 </tr> |
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217 <tr> |
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218 <td style="vertical-align: top;">u4<br> |
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219 </td> |
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220 <td style="vertical-align: top;">low word of number of |
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221 milliseconds since 0:00 GMT, 1/1/70</td> |
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222 </tr> |
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223 </tbody> |
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224 </table> |
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225 <br> |
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226 Followed by a se<span style="font-family: monospace;"></span>quence of |
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227 records that look like:<br> |
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228 <br> |
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229 <table style="text-align: left; width: 100%;" border="1" cellpadding="2" |
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230 cellspacing="2"> |
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231 <tbody> |
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232 <tr> |
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233 <td style="vertical-align: top;">u1<br> |
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234 </td> |
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235 <td style="vertical-align: top;">TAG: denoting the type of the |
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236 record</td> |
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237 </tr> |
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238 <tr> |
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239 <td style="vertical-align: top;">u4<br> |
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240 </td> |
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241 <td style="vertical-align: top;">TIME: number of microseconds |
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242 since the |
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243 time stamp in the header<br> |
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244 </td> |
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245 </tr> |
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246 <tr> |
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247 <td style="vertical-align: top;">u4<br> |
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248 </td> |
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249 <td style="vertical-align: top;">LENGTH: number of bytes that |
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250 follow this |
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251 u4 field and belong to this record<br> |
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252 </td> |
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253 </tr> |
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254 <tr> |
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255 <td style="vertical-align: top;">[u1]*<br> |
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256 </td> |
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257 <td style="vertical-align: top;">BODY: as many bytes as specified |
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258 in |
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259 the above u4 field<br> |
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260 </td> |
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261 </tr> |
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262 </tbody> |
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263 </table> |
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264 <br> |
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265 <br> |
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266 The following TAGs are supported:<br> |
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267 <br> |
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268 <table style="text-align: left; width: 100%;" border="1" cellpadding="2" |
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269 cellspacing="2"> |
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270 <tbody> |
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271 <tr> |
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272 <td style="vertical-align: top;">STRING IN UTF8<br> |
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273 </td> |
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274 <td style="vertical-align: top;">0x01<br> |
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275 </td> |
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276 <td style="vertical-align: top;"> |
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277 <table style="text-align: left; width: 100%;" border="1" |
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278 cellpadding="2" cellspacing="2"> |
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279 <tbody> |
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280 <tr> |
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281 <td style="vertical-align: top;">ID<br> |
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282 </td> |
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283 <td style="vertical-align: top;">ID for this string<br> |
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284 </td> |
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285 </tr> |
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286 <tr> |
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287 <td style="vertical-align: top;">[u1]*<br> |
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288 </td> |
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289 <td style="vertical-align: top;">UTF8 characters for string |
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290 (NOT NULL terminated)<br> |
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291 </td> |
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292 </tr> |
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293 </tbody> |
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294 </table> |
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295 <br> |
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296 </td> |
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297 </tr> |
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298 <tr> |
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299 <td style="vertical-align: top;">LOAD CLASS<br> |
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300 </td> |
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301 <td style="vertical-align: top;">0x02<br> |
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302 </td> |
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303 <td style="vertical-align: top;"> |
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304 <table style="text-align: left; width: 100%;" border="1" |
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305 cellpadding="2" cellspacing="2"> |
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306 <tbody> |
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307 <tr> |
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308 <td style="vertical-align: top;">u4<br> |
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309 </td> |
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310 <td style="vertical-align: top;">class serial number |
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311 (always > 0)<br> |
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312 </td> |
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313 </tr> |
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314 <tr> |
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315 <td style="vertical-align: top;">ID<br> |
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316 </td> |
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317 <td style="vertical-align: top;">class object ID<br> |
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318 </td> |
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319 </tr> |
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320 <tr> |
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321 <td style="vertical-align: top;">u4<br> |
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322 </td> |
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323 <td style="vertical-align: top;">stack trace serial number<br> |
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324 </td> |
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325 </tr> |
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326 <tr> |
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327 <td style="vertical-align: top;">ID<br> |
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328 </td> |
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329 <td style="vertical-align: top;">class name string ID<br> |
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330 </td> |
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331 </tr> |
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332 </tbody> |
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333 </table> |
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334 <br> |
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335 </td> |
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336 </tr> |
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337 <tr> |
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338 <td style="vertical-align: top;">UNLOAD CLASS<br> |
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339 </td> |
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340 <td style="vertical-align: top;">0x03<br> |
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341 </td> |
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342 <td style="vertical-align: top;"> |
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343 <table style="text-align: left; width: 100%;" border="1" |
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344 cellpadding="2" cellspacing="2"> |
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345 <tbody> |
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346 <tr> |
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347 <td style="vertical-align: top;">u4<br> |
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348 </td> |
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349 <td style="vertical-align: top;">class serial number<br> |
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350 </td> |
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351 </tr> |
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352 </tbody> |
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353 </table> |
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354 <br> |
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355 </td> |
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356 </tr> |
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357 <tr> |
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358 <td style="vertical-align: top;">STACK FRAME<br> |
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359 </td> |
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360 <td style="vertical-align: top;">0x04<br> |
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361 </td> |
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362 <td style="vertical-align: top;"> |
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363 <table style="text-align: left; width: 100%;" border="1" |
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364 cellpadding="2" cellspacing="2"> |
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365 <tbody> |
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366 <tr> |
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367 <td style="vertical-align: top;">ID<br> |
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368 </td> |
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369 <td style="vertical-align: top;">stack frame ID<br> |
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370 </td> |
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371 </tr> |
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372 <tr> |
|
373 <td style="vertical-align: top;">ID<br> |
|
374 </td> |
|
375 <td style="vertical-align: top;">method name string ID<br> |
|
376 </td> |
|
377 </tr> |
|
378 <tr> |
|
379 <td style="vertical-align: top;">ID<br> |
|
380 </td> |
|
381 <td style="vertical-align: top;">method signature string ID<br> |
|
382 </td> |
|
383 </tr> |
|
384 <tr> |
|
385 <td style="vertical-align: top;">ID<br> |
|
386 </td> |
|
387 <td style="vertical-align: top;">source file name string ID<br> |
|
388 </td> |
|
389 </tr> |
|
390 <tr> |
|
391 <td style="vertical-align: top;">u4<br> |
|
392 </td> |
|
393 <td style="vertical-align: top;">class serial number<br> |
|
394 </td> |
|
395 </tr> |
|
396 <tr> |
|
397 <td style="vertical-align: top;">u4<br> |
|
398 </td> |
|
399 <td style="vertical-align: top;"> |
|
400 <table style="text-align: left; width: 100%;" border="1" |
|
401 cellpadding="2" cellspacing="2"> |
|
402 <tbody> |
|
403 <tr> |
|
404 <td style="vertical-align: top;">> 0<br> |
|
405 </td> |
|
406 <td style="vertical-align: top;">line number<br> |
|
407 </td> |
|
408 </tr> |
|
409 <tr> |
|
410 <td style="vertical-align: top;">0<br> |
|
411 </td> |
|
412 <td style="vertical-align: top;">no line information |
|
413 available<br> |
|
414 </td> |
|
415 </tr> |
|
416 <tr> |
|
417 <td style="vertical-align: top;">-1<br> |
|
418 </td> |
|
419 <td style="vertical-align: top;">unknown location<br> |
|
420 </td> |
|
421 </tr> |
|
422 <tr> |
|
423 <td style="vertical-align: top;">-2<br> |
|
424 </td> |
|
425 <td style="vertical-align: top;">compiled method (<span |
|
426 style="font-style: italic; color: rgb(255, 0, 0);">Not implemented</span>)<br> |
|
427 </td> |
|
428 </tr> |
|
429 <tr> |
|
430 <td style="vertical-align: top;">-3<br> |
|
431 </td> |
|
432 <td style="vertical-align: top;">native method (<span |
|
433 style="color: rgb(255, 0, 0); font-style: italic;">Not implemented</span>)<br> |
|
434 </td> |
|
435 </tr> |
|
436 </tbody> |
|
437 </table> |
|
438 <br> |
|
439 </td> |
|
440 </tr> |
|
441 </tbody> |
|
442 </table> |
|
443 <br> |
|
444 </td> |
|
445 </tr> |
|
446 <tr> |
|
447 <td style="vertical-align: top;">STACK TRACE<br> |
|
448 </td> |
|
449 <td style="vertical-align: top;">0x05<br> |
|
450 </td> |
|
451 <td style="vertical-align: top;"> |
|
452 <table style="text-align: left; width: 100%;" border="1" |
|
453 cellpadding="2" cellspacing="2"> |
|
454 <tbody> |
|
455 <tr> |
|
456 <td style="vertical-align: top;">u4<br> |
|
457 </td> |
|
458 <td style="vertical-align: top;">stack trace serial number<br> |
|
459 </td> |
|
460 </tr> |
|
461 <tr> |
|
462 <td style="vertical-align: top;">u4<br> |
|
463 </td> |
|
464 <td style="vertical-align: top;">thread serial number<br> |
|
465 </td> |
|
466 </tr> |
|
467 <tr> |
|
468 <td style="vertical-align: top;">u4<br> |
|
469 </td> |
|
470 <td style="vertical-align: top;">number of frames<br> |
|
471 </td> |
|
472 </tr> |
|
473 <tr> |
|
474 <td style="vertical-align: top;">[ID]*<br> |
|
475 </td> |
|
476 <td style="vertical-align: top;">series of stack frame ID's<br> |
|
477 </td> |
|
478 </tr> |
|
479 </tbody> |
|
480 </table> |
|
481 <br> |
|
482 </td> |
|
483 </tr> |
|
484 <tr> |
|
485 <td style="vertical-align: top;">ALLOC SITES<br> |
|
486 </td> |
|
487 <td style="vertical-align: top;">0x06<br> |
|
488 </td> |
|
489 <td style="vertical-align: top;"> |
|
490 <table style="text-align: left; width: 100%;" border="1" |
|
491 cellpadding="2" cellspacing="2"> |
|
492 <tbody> |
|
493 <tr> |
|
494 <td style="vertical-align: top;">u2<br> |
|
495 </td> |
|
496 <td style="vertical-align: top;">Bit mask flags:<br> |
|
497 <table style="text-align: left; width: 441px; height: 74px;" |
|
498 border="1" cellpadding="2" cellspacing="2"> |
|
499 <tbody> |
|
500 <tr> |
|
501 <td style="vertical-align: top;">0x1<br> |
|
502 </td> |
|
503 <td style="vertical-align: top;">incremental vs. |
|
504 complete<br> |
|
505 </td> |
|
506 </tr> |
|
507 <tr> |
|
508 <td style="vertical-align: top;">0x2<br> |
|
509 </td> |
|
510 <td style="vertical-align: top; text-align: left;">sorted |
|
511 by allocation vs. line<br> |
|
512 </td> |
|
513 </tr> |
|
514 <tr> |
|
515 <td style="vertical-align: top;">0x4<br> |
|
516 </td> |
|
517 <td style="vertical-align: top;">whether to force GC |
|
518 (<span style="font-style: italic; color: rgb(255, 0, 0);">Not |
|
519 Implemented</span>)<br> |
|
520 </td> |
|
521 </tr> |
|
522 </tbody> |
|
523 </table> |
|
524 <br> |
|
525 </td> |
|
526 </tr> |
|
527 <tr> |
|
528 <td style="vertical-align: top;">u4<br> |
|
529 </td> |
|
530 <td style="vertical-align: top;">cutoff ratio (floating |
|
531 point)<br> |
|
532 </td> |
|
533 </tr> |
|
534 <tr> |
|
535 <td style="vertical-align: top;">u4<br> |
|
536 </td> |
|
537 <td style="vertical-align: top;">total live bytes<br> |
|
538 </td> |
|
539 </tr> |
|
540 <tr> |
|
541 <td style="vertical-align: top;">u4<br> |
|
542 </td> |
|
543 <td style="vertical-align: top;">total live instances<br> |
|
544 </td> |
|
545 </tr> |
|
546 <tr> |
|
547 <td style="vertical-align: top;">u8<br> |
|
548 </td> |
|
549 <td style="vertical-align: top;">total bytes allocated<br> |
|
550 </td> |
|
551 </tr> |
|
552 <tr> |
|
553 <td style="vertical-align: top;">u8<br> |
|
554 </td> |
|
555 <td style="vertical-align: top;">total instances allocated<br> |
|
556 </td> |
|
557 </tr> |
|
558 <tr> |
|
559 <td style="vertical-align: top;">u4<br> |
|
560 </td> |
|
561 <td style="vertical-align: top;">number of sites that |
|
562 follow:<br> |
|
563 <table style="text-align: left; width: 100%;" border="1" |
|
564 cellpadding="2" cellspacing="2"> |
|
565 <tbody> |
|
566 <tr> |
|
567 <td style="vertical-align: top;">u1<br> |
|
568 </td> |
|
569 <td style="vertical-align: top;">array indicator: 0 |
|
570 means not an array, non-zero means an array of this type (See <a |
|
571 href="#Basic_Type">Basic Type</a>)<br> |
|
572 </td> |
|
573 </tr> |
|
574 <tr> |
|
575 <td style="vertical-align: top;">u4<br> |
|
576 </td> |
|
577 <td style="vertical-align: top;">class serial number<br> |
|
578 </td> |
|
579 </tr> |
|
580 <tr> |
|
581 <td style="vertical-align: top;">u4<br> |
|
582 </td> |
|
583 <td style="vertical-align: top;">stack trace serial |
|
584 number<br> |
|
585 </td> |
|
586 </tr> |
|
587 <tr> |
|
588 <td style="vertical-align: top;">u4<br> |
|
589 </td> |
|
590 <td style="vertical-align: top;">number of live bytes<br> |
|
591 </td> |
|
592 </tr> |
|
593 <tr> |
|
594 <td style="vertical-align: top;">u4<br> |
|
595 </td> |
|
596 <td style="vertical-align: top;">number of live |
|
597 instances<br> |
|
598 </td> |
|
599 </tr> |
|
600 <tr> |
|
601 <td style="vertical-align: top;">u4<br> |
|
602 </td> |
|
603 <td style="vertical-align: top;">number of bytes |
|
604 allocated<br> |
|
605 </td> |
|
606 </tr> |
|
607 <tr> |
|
608 <td style="vertical-align: top;">u4<br> |
|
609 </td> |
|
610 <td style="vertical-align: top;">number of instances |
|
611 allocated<br> |
|
612 </td> |
|
613 </tr> |
|
614 </tbody> |
|
615 </table> |
|
616 <br> |
|
617 </td> |
|
618 </tr> |
|
619 </tbody> |
|
620 </table> |
|
621 <br> |
|
622 </td> |
|
623 </tr> |
|
624 <tr> |
|
625 <td style="vertical-align: top;">HEAP SUMMARY<br> |
|
626 </td> |
|
627 <td style="vertical-align: top;">0x07<br> |
|
628 </td> |
|
629 <td style="vertical-align: top;"> |
|
630 <table style="text-align: left; width: 100%;" border="1" |
|
631 cellpadding="2" cellspacing="2"> |
|
632 <tbody> |
|
633 <tr> |
|
634 <td style="vertical-align: top;">u4<br> |
|
635 </td> |
|
636 <td style="vertical-align: top;">total live bytes<br> |
|
637 </td> |
|
638 </tr> |
|
639 <tr> |
|
640 <td style="vertical-align: top;">u4<br> |
|
641 </td> |
|
642 <td style="vertical-align: top;">total live instances<br> |
|
643 </td> |
|
644 </tr> |
|
645 <tr> |
|
646 <td style="vertical-align: top;">u8<br> |
|
647 </td> |
|
648 <td style="vertical-align: top;">total bytes allocated<br> |
|
649 </td> |
|
650 </tr> |
|
651 <tr> |
|
652 <td style="vertical-align: top;">u8<br> |
|
653 </td> |
|
654 <td style="vertical-align: top;">total instances allocated<br> |
|
655 </td> |
|
656 </tr> |
|
657 </tbody> |
|
658 </table> |
|
659 <br> |
|
660 </td> |
|
661 </tr> |
|
662 <tr> |
|
663 <td style="vertical-align: top;">START THREAD<br> |
|
664 </td> |
|
665 <td style="vertical-align: top;">0x0A<br> |
|
666 </td> |
|
667 <td style="vertical-align: top;"> |
|
668 <table style="text-align: left; width: 100%;" border="1" |
|
669 cellpadding="2" cellspacing="2"> |
|
670 <tbody> |
|
671 <tr> |
|
672 <td style="vertical-align: top;">u4<br> |
|
673 </td> |
|
674 <td style="vertical-align: top;">thread serial number<br> |
|
675 </td> |
|
676 </tr> |
|
677 <tr> |
|
678 <td style="vertical-align: top;">ID<br> |
|
679 </td> |
|
680 <td style="vertical-align: top;">thread object ID<br> |
|
681 </td> |
|
682 </tr> |
|
683 <tr> |
|
684 <td style="vertical-align: top;">u4<br> |
|
685 </td> |
|
686 <td style="vertical-align: top;">stack trace serial number<br> |
|
687 </td> |
|
688 </tr> |
|
689 <tr> |
|
690 <td style="vertical-align: top;">ID<br> |
|
691 </td> |
|
692 <td style="vertical-align: top;">thread name string ID<br> |
|
693 </td> |
|
694 </tr> |
|
695 <tr> |
|
696 <td style="vertical-align: top;">ID<br> |
|
697 </td> |
|
698 <td style="vertical-align: top;">thread group name ID<br> |
|
699 </td> |
|
700 </tr> |
|
701 <tr> |
|
702 <td style="vertical-align: top;">ID<br> |
|
703 </td> |
|
704 <td style="vertical-align: top;">thread parent group name ID<br> |
|
705 </td> |
|
706 </tr> |
|
707 </tbody> |
|
708 </table> |
|
709 <br> |
|
710 </td> |
|
711 </tr> |
|
712 <tr> |
|
713 <td style="vertical-align: top;">END THREAD<br> |
|
714 </td> |
|
715 <td style="vertical-align: top;">0x0B<br> |
|
716 </td> |
|
717 <td style="vertical-align: top;"> |
|
718 <table style="text-align: left; width: 100%;" border="1" |
|
719 cellpadding="2" cellspacing="2"> |
|
720 <tbody> |
|
721 <tr> |
|
722 <td style="vertical-align: top;">u4<br> |
|
723 </td> |
|
724 <td style="vertical-align: top;">thread serial number<br> |
|
725 </td> |
|
726 </tr> |
|
727 </tbody> |
|
728 </table> |
|
729 <br> |
|
730 </td> |
|
731 </tr> |
|
732 <tr> |
|
733 <td style="vertical-align: top;">HEAP DUMP<br> |
|
734 <span style="font-style: italic;">or</span><br> |
|
735 HEAP DUMP SEGMENT<br> |
|
736 </td> |
|
737 <td style="vertical-align: top;">0x0C<br> |
|
738 <span style="font-style: italic;">or</span><br> |
|
739 0x1C<br> |
|
740 </td> |
|
741 <td style="vertical-align: top;">Contains any number of sub-tags, |
|
742 each begins a u1 field (no order implied here):<br> |
|
743 <table style="text-align: left; width: 100%;" border="1" |
|
744 cellpadding="2" cellspacing="2"> |
|
745 <tbody> |
|
746 <tr> |
|
747 <td style="vertical-align: top;">ROOT UNKNOWN<br> |
|
748 </td> |
|
749 <td style="vertical-align: top;">0xFF<br> |
|
750 </td> |
|
751 <td style="vertical-align: top;"> |
|
752 <table style="text-align: left; width: 100%;" border="1" |
|
753 cellpadding="2" cellspacing="2"> |
|
754 <tbody> |
|
755 <tr> |
|
756 <td style="vertical-align: top;">ID<br> |
|
757 </td> |
|
758 <td style="vertical-align: top;">object ID<br> |
|
759 </td> |
|
760 </tr> |
|
761 </tbody> |
|
762 </table> |
|
763 <br> |
|
764 </td> |
|
765 </tr> |
|
766 <tr> |
|
767 <td style="vertical-align: top;">ROOT JNI GLOBAL<br> |
|
768 </td> |
|
769 <td style="vertical-align: top;">0x01<br> |
|
770 </td> |
|
771 <td style="vertical-align: top;"> |
|
772 <table style="text-align: left; width: 100%;" border="1" |
|
773 cellpadding="2" cellspacing="2"> |
|
774 <tbody> |
|
775 <tr> |
|
776 <td style="vertical-align: top;">ID<br> |
|
777 </td> |
|
778 <td style="vertical-align: top;">object ID<br> |
|
779 </td> |
|
780 </tr> |
|
781 <tr> |
|
782 <td style="vertical-align: top;">ID<br> |
|
783 </td> |
|
784 <td style="vertical-align: top;">JNI global ref ID<br> |
|
785 </td> |
|
786 </tr> |
|
787 </tbody> |
|
788 </table> |
|
789 <br> |
|
790 </td> |
|
791 </tr> |
|
792 <tr> |
|
793 <td style="vertical-align: top;">ROOT JNI LOCAL<br> |
|
794 </td> |
|
795 <td style="vertical-align: top;">0x02<br> |
|
796 </td> |
|
797 <td style="vertical-align: top;"> |
|
798 <table style="text-align: left; width: 100%;" border="1" |
|
799 cellpadding="2" cellspacing="2"> |
|
800 <tbody> |
|
801 <tr> |
|
802 <td style="vertical-align: top;">ID<br> |
|
803 </td> |
|
804 <td style="vertical-align: top;">object ID<br> |
|
805 </td> |
|
806 </tr> |
|
807 <tr> |
|
808 <td style="vertical-align: top;">u4<br> |
|
809 </td> |
|
810 <td style="vertical-align: top;">thread serial number<br> |
|
811 </td> |
|
812 </tr> |
|
813 <tr> |
|
814 <td style="vertical-align: top;">u4<br> |
|
815 </td> |
|
816 <td style="vertical-align: top;">frame number in |
|
817 stack trace (-1 for empty)<br> |
|
818 </td> |
|
819 </tr> |
|
820 </tbody> |
|
821 </table> |
|
822 <br> |
|
823 </td> |
|
824 </tr> |
|
825 <tr> |
|
826 <td style="vertical-align: top;">ROOT JAVA FRAME<br> |
|
827 </td> |
|
828 <td style="vertical-align: top;">0x03<br> |
|
829 </td> |
|
830 <td style="vertical-align: top;"> |
|
831 <table style="text-align: left; width: 100%;" border="1" |
|
832 cellpadding="2" cellspacing="2"> |
|
833 <tbody> |
|
834 <tr> |
|
835 <td style="vertical-align: top;">ID<br> |
|
836 </td> |
|
837 <td style="vertical-align: top;">object ID<br> |
|
838 </td> |
|
839 </tr> |
|
840 <tr> |
|
841 <td style="vertical-align: top;">u4<br> |
|
842 </td> |
|
843 <td style="vertical-align: top;">thread serial number<br> |
|
844 </td> |
|
845 </tr> |
|
846 <tr> |
|
847 <td style="vertical-align: top;">u4<br> |
|
848 </td> |
|
849 <td style="vertical-align: top;">frame number in |
|
850 stack trace (-1 for empty)</td> |
|
851 </tr> |
|
852 </tbody> |
|
853 </table> |
|
854 <br> |
|
855 </td> |
|
856 </tr> |
|
857 <tr> |
|
858 <td style="vertical-align: top;">ROOT NATIVE STACK<br> |
|
859 </td> |
|
860 <td style="vertical-align: top;">0x04<br> |
|
861 </td> |
|
862 <td style="vertical-align: top;"> |
|
863 <table style="text-align: left; width: 100%;" border="1" |
|
864 cellpadding="2" cellspacing="2"> |
|
865 <tbody> |
|
866 <tr> |
|
867 <td style="vertical-align: top;">ID<br> |
|
868 </td> |
|
869 <td style="vertical-align: top;">object ID<br> |
|
870 </td> |
|
871 </tr> |
|
872 <tr> |
|
873 <td style="vertical-align: top;">u4<br> |
|
874 </td> |
|
875 <td style="vertical-align: top;">thread serial number<br> |
|
876 </td> |
|
877 </tr> |
|
878 </tbody> |
|
879 </table> |
|
880 <br> |
|
881 </td> |
|
882 </tr> |
|
883 <tr> |
|
884 <td style="vertical-align: top;">ROOT STICKY CLASS<br> |
|
885 </td> |
|
886 <td style="vertical-align: top;">0x05<br> |
|
887 </td> |
|
888 <td style="vertical-align: top;"> |
|
889 <table style="text-align: left; width: 100%;" border="1" |
|
890 cellpadding="2" cellspacing="2"> |
|
891 <tbody> |
|
892 <tr> |
|
893 <td style="vertical-align: top;">ID<br> |
|
894 </td> |
|
895 <td style="vertical-align: top;">object ID<br> |
|
896 </td> |
|
897 </tr> |
|
898 </tbody> |
|
899 </table> |
|
900 <br> |
|
901 </td> |
|
902 </tr> |
|
903 <tr> |
|
904 <td style="vertical-align: top;">ROOT THREAD BLOCK<br> |
|
905 </td> |
|
906 <td style="vertical-align: top;">0x06<br> |
|
907 </td> |
|
908 <td style="vertical-align: top;"> |
|
909 <table style="text-align: left; width: 100%;" border="1" |
|
910 cellpadding="2" cellspacing="2"> |
|
911 <tbody> |
|
912 <tr> |
|
913 <td style="vertical-align: top;">ID<br> |
|
914 </td> |
|
915 <td style="vertical-align: top;">object ID<br> |
|
916 </td> |
|
917 </tr> |
|
918 <tr> |
|
919 <td style="vertical-align: top;">u4<br> |
|
920 </td> |
|
921 <td style="vertical-align: top;">thread serial number<br> |
|
922 </td> |
|
923 </tr> |
|
924 </tbody> |
|
925 </table> |
|
926 <br> |
|
927 </td> |
|
928 </tr> |
|
929 <tr> |
|
930 <td style="vertical-align: top;">ROOT MONITOR USED<br> |
|
931 </td> |
|
932 <td style="vertical-align: top;">0x07<br> |
|
933 </td> |
|
934 <td style="vertical-align: top;"> |
|
935 <table style="text-align: left; width: 100%;" border="1" |
|
936 cellpadding="2" cellspacing="2"> |
|
937 <tbody> |
|
938 <tr> |
|
939 <td style="vertical-align: top;">ID<br> |
|
940 </td> |
|
941 <td style="vertical-align: top;">object ID<br> |
|
942 </td> |
|
943 </tr> |
|
944 </tbody> |
|
945 </table> |
|
946 <br> |
|
947 </td> |
|
948 </tr> |
|
949 <tr> |
|
950 <td style="vertical-align: top;">ROOT THREAD OBJECT<br> |
|
951 </td> |
|
952 <td style="vertical-align: top;">0x08<br> |
|
953 </td> |
|
954 <td style="vertical-align: top;"> |
|
955 <table style="text-align: left; width: 100%;" border="1" |
|
956 cellpadding="2" cellspacing="2"> |
|
957 <tbody> |
|
958 <tr> |
|
959 <td style="vertical-align: top;">ID<br> |
|
960 </td> |
|
961 <td style="vertical-align: top;">thread object ID<br> |
|
962 </td> |
|
963 </tr> |
|
964 <tr> |
|
965 <td style="vertical-align: top;">u4<br> |
|
966 </td> |
|
967 <td style="vertical-align: top;">thread serial number<br> |
|
968 </td> |
|
969 </tr> |
|
970 <tr> |
|
971 <td style="vertical-align: top;">u4<br> |
|
972 </td> |
|
973 <td style="vertical-align: top;">stack trace serial |
|
974 number<br> |
|
975 </td> |
|
976 </tr> |
|
977 </tbody> |
|
978 </table> |
|
979 <br> |
|
980 </td> |
|
981 </tr> |
|
982 <tr> |
|
983 <td style="vertical-align: top;">CLASS DUMP<br> |
|
984 </td> |
|
985 <td style="vertical-align: top;">0x20<br> |
|
986 </td> |
|
987 <td style="vertical-align: top;"> |
|
988 <table style="text-align: left; width: 100%;" border="1" |
|
989 cellpadding="2" cellspacing="2"> |
|
990 <tbody> |
|
991 <tr> |
|
992 <td style="vertical-align: top;">ID<br> |
|
993 </td> |
|
994 <td style="vertical-align: top;">class object ID<br> |
|
995 </td> |
|
996 </tr> |
|
997 <tr> |
|
998 <td style="vertical-align: top;">u4<br> |
|
999 </td> |
|
1000 <td style="vertical-align: top;">stack trace serial |
|
1001 number<br> |
|
1002 </td> |
|
1003 </tr> |
|
1004 <tr> |
|
1005 <td style="vertical-align: top;">ID<br> |
|
1006 </td> |
|
1007 <td style="vertical-align: top;">super class object ID<br> |
|
1008 </td> |
|
1009 </tr> |
|
1010 <tr> |
|
1011 <td style="vertical-align: top;">ID<br> |
|
1012 </td> |
|
1013 <td style="vertical-align: top;">class loader object |
|
1014 ID<br> |
|
1015 </td> |
|
1016 </tr> |
|
1017 <tr> |
|
1018 <td style="vertical-align: top;">ID<br> |
|
1019 </td> |
|
1020 <td style="vertical-align: top;">signers object ID<br> |
|
1021 </td> |
|
1022 </tr> |
|
1023 <tr> |
|
1024 <td style="vertical-align: top;">ID<br> |
|
1025 </td> |
|
1026 <td style="vertical-align: top;">protection domain |
|
1027 object ID<br> |
|
1028 </td> |
|
1029 </tr> |
|
1030 <tr> |
|
1031 <td style="vertical-align: top;">ID<br> |
|
1032 </td> |
|
1033 <td style="vertical-align: top;">reserved<br> |
|
1034 </td> |
|
1035 </tr> |
|
1036 <tr> |
|
1037 <td style="vertical-align: top;">ID<br> |
|
1038 </td> |
|
1039 <td style="vertical-align: top;">reserved<br> |
|
1040 </td> |
|
1041 </tr> |
|
1042 <tr> |
|
1043 <td style="vertical-align: top;">u4<br> |
|
1044 </td> |
|
1045 <td style="vertical-align: top;">instance size (in |
|
1046 bytes)<br> |
|
1047 </td> |
|
1048 </tr> |
|
1049 <tr> |
|
1050 <td style="vertical-align: top;">u2<br> |
|
1051 </td> |
|
1052 <td style="vertical-align: top;">size of constant |
|
1053 pool and number of records that follow:<br> |
|
1054 <table style="text-align: left; width: 100%;" |
|
1055 border="1" cellpadding="2" cellspacing="2"> |
|
1056 <tbody> |
|
1057 <tr> |
|
1058 <td style="vertical-align: top;">u2<br> |
|
1059 </td> |
|
1060 <td style="vertical-align: top;">constant pool |
|
1061 index<br> |
|
1062 </td> |
|
1063 </tr> |
|
1064 <tr> |
|
1065 <td style="vertical-align: top;">u1<br> |
|
1066 </td> |
|
1067 <td style="vertical-align: top;">type of entry: |
|
1068 (See <a href="#Basic_Type">Basic Type</a>)<br> |
|
1069 </td> |
|
1070 </tr> |
|
1071 <tr> |
|
1072 <td style="vertical-align: top;">value<br> |
|
1073 </td> |
|
1074 <td style="vertical-align: top;">value of entry |
|
1075 (u1, u2, u4, or u8 based on type of entry)<span |
|
1076 style="font-style: italic; color: rgb(255, 0, 0);"></span><br> |
|
1077 </td> |
|
1078 </tr> |
|
1079 </tbody> |
|
1080 </table> |
|
1081 <br> |
|
1082 </td> |
|
1083 </tr> |
|
1084 <tr> |
|
1085 <td style="vertical-align: top;">u2<br> |
|
1086 </td> |
|
1087 <td style="vertical-align: top;">Number of static |
|
1088 fields:<br> |
|
1089 <table style="text-align: left; width: 100%;" |
|
1090 border="1" cellpadding="2" cellspacing="2"> |
|
1091 <tbody> |
|
1092 <tr> |
|
1093 <td style="vertical-align: top;">ID<br> |
|
1094 </td> |
|
1095 <td style="vertical-align: top;">static field |
|
1096 name string ID<br> |
|
1097 </td> |
|
1098 </tr> |
|
1099 <tr> |
|
1100 <td style="vertical-align: top;">u1<br> |
|
1101 </td> |
|
1102 <td style="vertical-align: top;">type of field: |
|
1103 (See <a href="#Basic_Type">Basic Type</a>)<br> |
|
1104 </td> |
|
1105 </tr> |
|
1106 <tr> |
|
1107 <td style="vertical-align: top;">value<br> |
|
1108 </td> |
|
1109 <td style="vertical-align: top;">value of entry |
|
1110 (u1, u2, u4, or u8 based on type of field) <span |
|
1111 style="font-style: italic; color: rgb(255, 0, 0);"></span><br> |
|
1112 </td> |
|
1113 </tr> |
|
1114 </tbody> |
|
1115 </table> |
|
1116 <br> |
|
1117 </td> |
|
1118 </tr> |
|
1119 <tr> |
|
1120 <td style="vertical-align: top;">u2<br> |
|
1121 </td> |
|
1122 <td style="vertical-align: top;">Number of instance |
|
1123 fields (not including super class's)<br> |
|
1124 <table style="text-align: left; width: 100%;" |
|
1125 border="1" cellpadding="2" cellspacing="2"> |
|
1126 <tbody> |
|
1127 <tr> |
|
1128 <td style="vertical-align: top;">ID<br> |
|
1129 </td> |
|
1130 <td style="vertical-align: top;">field name |
|
1131 string ID<br> |
|
1132 </td> |
|
1133 </tr> |
|
1134 <tr> |
|
1135 <td style="vertical-align: top;">u1<br> |
|
1136 </td> |
|
1137 <td style="vertical-align: top;">type of field: |
|
1138 (See <a href="#Basic_Type">Basic Type</a>)<br> |
|
1139 </td> |
|
1140 </tr> |
|
1141 </tbody> |
|
1142 </table> |
|
1143 <br> |
|
1144 </td> |
|
1145 </tr> |
|
1146 </tbody> |
|
1147 </table> |
|
1148 <br> |
|
1149 </td> |
|
1150 </tr> |
|
1151 <tr> |
|
1152 <td style="vertical-align: top;">INSTANCE DUMP<br> |
|
1153 </td> |
|
1154 <td style="vertical-align: top;">0x21<br> |
|
1155 </td> |
|
1156 <td style="vertical-align: top;"><br> |
|
1157 <table style="text-align: left; width: 100%;" border="1" |
|
1158 cellpadding="2" cellspacing="2"> |
|
1159 <tbody> |
|
1160 <tr> |
|
1161 <td style="vertical-align: top;">ID<br> |
|
1162 </td> |
|
1163 <td style="vertical-align: top;">object ID<br> |
|
1164 </td> |
|
1165 </tr> |
|
1166 <tr> |
|
1167 <td style="vertical-align: top;">u4<br> |
|
1168 </td> |
|
1169 <td style="vertical-align: top;">stack trace serial |
|
1170 number<br> |
|
1171 </td> |
|
1172 </tr> |
|
1173 <tr> |
|
1174 <td style="vertical-align: top;">ID<br> |
|
1175 </td> |
|
1176 <td style="vertical-align: top;">class object ID<br> |
|
1177 </td> |
|
1178 </tr> |
|
1179 <tr> |
|
1180 <td style="vertical-align: top;">u4<br> |
|
1181 </td> |
|
1182 <td style="vertical-align: top;">number of bytes that |
|
1183 follow<br> |
|
1184 </td> |
|
1185 </tr> |
|
1186 <tr> |
|
1187 <td style="vertical-align: top;">[value]*<br> |
|
1188 </td> |
|
1189 <td style="vertical-align: top;">instance field |
|
1190 values (this class, followed by super class, etc)<span |
|
1191 style="font-style: italic; color: rgb(255, 0, 0);"></span><br> |
|
1192 </td> |
|
1193 </tr> |
|
1194 </tbody> |
|
1195 </table> |
|
1196 <br> |
|
1197 </td> |
|
1198 </tr> |
|
1199 <tr> |
|
1200 <td style="vertical-align: top;">OBJECT ARRAY DUMP<br> |
|
1201 </td> |
|
1202 <td style="vertical-align: top;">0x22<br> |
|
1203 </td> |
|
1204 <td style="vertical-align: top;"><br> |
|
1205 <table style="text-align: left; width: 100%;" border="1" |
|
1206 cellpadding="2" cellspacing="2"> |
|
1207 <tbody> |
|
1208 <tr> |
|
1209 <td style="vertical-align: top;">ID<br> |
|
1210 </td> |
|
1211 <td style="vertical-align: top;">array object ID<br> |
|
1212 </td> |
|
1213 </tr> |
|
1214 <tr> |
|
1215 <td style="vertical-align: top;">u4<br> |
|
1216 </td> |
|
1217 <td style="vertical-align: top;">stack trace serial |
|
1218 number<br> |
|
1219 </td> |
|
1220 </tr> |
|
1221 <tr> |
|
1222 <td style="vertical-align: top;">u4<br> |
|
1223 </td> |
|
1224 <td style="vertical-align: top;">number of elements<br> |
|
1225 </td> |
|
1226 </tr> |
|
1227 <tr> |
|
1228 <td style="vertical-align: top;">ID<br> |
|
1229 </td> |
|
1230 <td style="vertical-align: top;">array class object |
|
1231 ID<br> |
|
1232 </td> |
|
1233 </tr> |
|
1234 <tr> |
|
1235 <td style="vertical-align: top;">[ID]*<br> |
|
1236 </td> |
|
1237 <td style="vertical-align: top;">elements<br> |
|
1238 </td> |
|
1239 </tr> |
|
1240 </tbody> |
|
1241 </table> |
|
1242 <br> |
|
1243 </td> |
|
1244 </tr> |
|
1245 <tr> |
|
1246 <td style="vertical-align: top;">PRIMITIVE ARRAY DUMP<br> |
|
1247 </td> |
|
1248 <td style="vertical-align: top;">0x23<br> |
|
1249 </td> |
|
1250 <td style="vertical-align: top;"> |
|
1251 <table style="text-align: left; width: 100%;" border="1" |
|
1252 cellpadding="2" cellspacing="2"> |
|
1253 <tbody> |
|
1254 <tr> |
|
1255 <td style="vertical-align: top;">ID<br> |
|
1256 </td> |
|
1257 <td style="vertical-align: top;">array object ID<br> |
|
1258 </td> |
|
1259 </tr> |
|
1260 <tr> |
|
1261 <td style="vertical-align: top;">u4<br> |
|
1262 </td> |
|
1263 <td style="vertical-align: top;">stack trace serial |
|
1264 number<br> |
|
1265 </td> |
|
1266 </tr> |
|
1267 <tr> |
|
1268 <td style="vertical-align: top;">u4<br> |
|
1269 </td> |
|
1270 <td style="vertical-align: top;">number of elements<br> |
|
1271 </td> |
|
1272 </tr> |
|
1273 <tr> |
|
1274 <td style="vertical-align: top;">u1<br> |
|
1275 </td> |
|
1276 <td style="vertical-align: top;">element type (See <a |
|
1277 href="#Basic_Type">Basic Type</a>)<br> |
|
1278 </td> |
|
1279 </tr> |
|
1280 <tr> |
|
1281 <td style="vertical-align: top;">[u1]*<br> |
|
1282 </td> |
|
1283 <td style="vertical-align: top;">elements (packed |
|
1284 array) </td> |
|
1285 </tr> |
|
1286 </tbody> |
|
1287 </table> |
|
1288 <br> |
|
1289 </td> |
|
1290 </tr> |
|
1291 </tbody> |
|
1292 </table> |
|
1293 <br> |
|
1294 </td> |
|
1295 </tr> |
|
1296 <tr> |
|
1297 <td style="vertical-align: top;">HEAP DUMP END<br> |
|
1298 </td> |
|
1299 <td style="vertical-align: top;">0x2C<br> |
|
1300 </td> |
|
1301 <td style="vertical-align: top;">Terminates a series of HEAP DUMP |
|
1302 SEGMENTS. Concatenation of HEAP DUMP SEGMENTS equals a HEAP DUMP.<br> |
|
1303 </td> |
|
1304 </tr> |
|
1305 <tr> |
|
1306 <td style="vertical-align: top;">CPU SAMPLES<br> |
|
1307 </td> |
|
1308 <td style="vertical-align: top;">0x0D<br> |
|
1309 </td> |
|
1310 <td style="vertical-align: top;"> |
|
1311 <table style="text-align: left; width: 100%;" border="1" |
|
1312 cellpadding="2" cellspacing="2"> |
|
1313 <tbody> |
|
1314 <tr> |
|
1315 <td style="vertical-align: top;">u4<br> |
|
1316 </td> |
|
1317 <td style="vertical-align: top;">total number of samples<br> |
|
1318 </td> |
|
1319 </tr> |
|
1320 <tr> |
|
1321 <td style="vertical-align: top;">u4<br> |
|
1322 </td> |
|
1323 <td style="vertical-align: top;">number of traces that |
|
1324 follow:<br> |
|
1325 <table style="text-align: left; width: 100%;" border="1" |
|
1326 cellpadding="2" cellspacing="2"> |
|
1327 <tbody> |
|
1328 <tr> |
|
1329 <td style="vertical-align: top;">u4<br> |
|
1330 </td> |
|
1331 <td style="vertical-align: top;">number of samples<br> |
|
1332 </td> |
|
1333 </tr> |
|
1334 <tr> |
|
1335 <td style="vertical-align: top;">u4<br> |
|
1336 </td> |
|
1337 <td style="vertical-align: top;">stack trace serial |
|
1338 number<br> |
|
1339 </td> |
|
1340 </tr> |
|
1341 </tbody> |
|
1342 </table> |
|
1343 <br> |
|
1344 </td> |
|
1345 </tr> |
|
1346 </tbody> |
|
1347 </table> |
|
1348 <br> |
|
1349 </td> |
|
1350 </tr> |
|
1351 <tr> |
|
1352 <td style="vertical-align: top;">CONTROL SETTINGS<br> |
|
1353 </td> |
|
1354 <td style="vertical-align: top;">0x0E<br> |
|
1355 </td> |
|
1356 <td style="vertical-align: top;"> |
|
1357 <table style="text-align: left; width: 100%;" border="1" |
|
1358 cellpadding="2" cellspacing="2"> |
|
1359 <tbody> |
|
1360 <tr> |
|
1361 <td style="vertical-align: top;">u4<br> |
|
1362 </td> |
|
1363 <td style="vertical-align: top;">Bit mask flags:<br> |
|
1364 <table style="text-align: left; width: 100%;" border="1" |
|
1365 cellpadding="2" cellspacing="2"> |
|
1366 <tbody> |
|
1367 <tr> |
|
1368 <td style="vertical-align: top;">0x1<br> |
|
1369 </td> |
|
1370 <td style="vertical-align: top;">alloc traces on/off<br> |
|
1371 </td> |
|
1372 </tr> |
|
1373 <tr> |
|
1374 <td style="vertical-align: top;">0x2<br> |
|
1375 </td> |
|
1376 <td style="vertical-align: top;">cpu sampling on/off<br> |
|
1377 </td> |
|
1378 </tr> |
|
1379 </tbody> |
|
1380 </table> |
|
1381 <br> |
|
1382 </td> |
|
1383 </tr> |
|
1384 <tr> |
|
1385 <td style="vertical-align: top;">u2<br> |
|
1386 </td> |
|
1387 <td style="vertical-align: top;">stack trace depth<br> |
|
1388 </td> |
|
1389 </tr> |
|
1390 </tbody> |
|
1391 </table> |
|
1392 <br> |
|
1393 </td> |
|
1394 </tr> |
|
1395 </tbody> |
|
1396 </table> |
|
1397 <span style="font-weight: bold;"><br> |
|
1398 </span><a name="Basic_Type"></a>Basic Type |
|
1399 <table style="text-align: left; width: 296px; height: 221px;" border="1" |
|
1400 cellpadding="2" cellspacing="2"> |
|
1401 <tbody> |
|
1402 <tr> |
|
1403 <td style="vertical-align: top;">2<br> |
|
1404 </td> |
|
1405 <td style="vertical-align: top;">object<br> |
|
1406 </td> |
|
1407 </tr> |
|
1408 <tr> |
|
1409 <td style="vertical-align: top;">4<br> |
|
1410 </td> |
|
1411 <td style="vertical-align: top;">boolean<br> |
|
1412 </td> |
|
1413 </tr> |
|
1414 <tr> |
|
1415 <td style="vertical-align: top;">5<br> |
|
1416 </td> |
|
1417 <td style="vertical-align: top;">char<br> |
|
1418 </td> |
|
1419 </tr> |
|
1420 <tr> |
|
1421 <td style="vertical-align: top;">6<br> |
|
1422 </td> |
|
1423 <td style="vertical-align: top;">float<br> |
|
1424 </td> |
|
1425 </tr> |
|
1426 <tr> |
|
1427 <td style="vertical-align: top;">7<br> |
|
1428 </td> |
|
1429 <td style="vertical-align: top;">double<br> |
|
1430 </td> |
|
1431 </tr> |
|
1432 <tr> |
|
1433 <td style="vertical-align: top;">8<br> |
|
1434 </td> |
|
1435 <td style="vertical-align: top;">byte<br> |
|
1436 </td> |
|
1437 </tr> |
|
1438 <tr> |
|
1439 <td style="vertical-align: top;">9<br> |
|
1440 </td> |
|
1441 <td style="vertical-align: top;">short<br> |
|
1442 </td> |
|
1443 </tr> |
|
1444 <tr> |
|
1445 <td style="vertical-align: top;">10<br> |
|
1446 </td> |
|
1447 <td style="vertical-align: top;">int<br> |
|
1448 </td> |
|
1449 </tr> |
|
1450 <tr> |
|
1451 <td style="vertical-align: top;">11<br> |
|
1452 </td> |
|
1453 <td style="vertical-align: top;">long<br> |
|
1454 </td> |
|
1455 </tr> |
|
1456 </tbody> |
|
1457 </table> |
|
1458 <h3><a name="mozTocId348360" class="mozTocH3"></a>Handling of Arrays</h3> |
|
1459 <br> |
|
1460 There will be a "LOAD CLASS" tag for type type of each array |
|
1461 in the dump. In the LOAD CLASS record, the class name string ID |
|
1462 will refer to a string with a human-readable name of the array |
|
1463 type that is formatted as the type name would be in Java source |
|
1464 code. Thus, the LOAD CLASS record for the type char[] will |
|
1465 be "char[]", for short[][][] will be "short[][][]" and for |
|
1466 MyType[] will be "MyType[]". |
|
1467 <br> |
|
1468 <h3><a name="mozTocId348369" class="mozTocH3"></a>Socket Connection and |
|
1469 Communication</h3> |
|
1470 <br> |
|
1471 <span style="font-weight: bold;">WARNING</span>: This command format is |
|
1472 still |
|
1473 considered highly experimental, however, all attempts were made to |
|
1474 match the format of past HPROF implementations.<br> |
|
1475 <br> |
|
1476 <br> |
|
1477 Commands can be sent to HPROF via the socket connection, the accepted |
|
1478 COMMAND TAGS are:<br> |
|
1479 <br> |
|
1480 <table style="text-align: left; width: 100%;" border="1" cellpadding="2" |
|
1481 cellspacing="2"> |
|
1482 <tbody> |
|
1483 <tr> |
|
1484 <td style="vertical-align: top;">FORCE GC (<span |
|
1485 style="font-style: italic; color: rgb(255, 0, 0);">Not implemented</span>)<br> |
|
1486 </td> |
|
1487 <td style="vertical-align: top;">0x01<br> |
|
1488 </td> |
|
1489 </tr> |
|
1490 <tr> |
|
1491 <td style="vertical-align: top;">DUMP HEAP<br> |
|
1492 </td> |
|
1493 <td style="vertical-align: top;">0x02<br> |
|
1494 </td> |
|
1495 </tr> |
|
1496 <tr> |
|
1497 <td style="vertical-align: top;">ALLOC SITES<br> |
|
1498 </td> |
|
1499 <td style="vertical-align: top;">0x03<br> |
|
1500 </td> |
|
1501 </tr> |
|
1502 <tr> |
|
1503 <td style="vertical-align: top;">HEAP SUMMARY<br> |
|
1504 </td> |
|
1505 <td style="vertical-align: top;">0x04<br> |
|
1506 </td> |
|
1507 </tr> |
|
1508 <tr> |
|
1509 <td style="vertical-align: top;">EXIT THE VM<br> |
|
1510 </td> |
|
1511 <td style="vertical-align: top;">0x05<br> |
|
1512 </td> |
|
1513 </tr> |
|
1514 <tr> |
|
1515 <td style="vertical-align: top;">DUMP TRACES<br> |
|
1516 </td> |
|
1517 <td style="vertical-align: top;">0x06<br> |
|
1518 </td> |
|
1519 </tr> |
|
1520 <tr> |
|
1521 <td style="vertical-align: top;">CPU SAMPLES<br> |
|
1522 </td> |
|
1523 <td style="vertical-align: top;">0x07<br> |
|
1524 </td> |
|
1525 </tr> |
|
1526 <tr> |
|
1527 <td style="vertical-align: top;">CONTROL<br> |
|
1528 </td> |
|
1529 <td style="vertical-align: top;">0x08<br> |
|
1530 </td> |
|
1531 </tr> |
|
1532 <tr> |
|
1533 <td style="vertical-align: top;">EOF (used to terminate socket |
|
1534 connection)<br> |
|
1535 </td> |
|
1536 <td style="vertical-align: top;">0xFF<br> |
|
1537 </td> |
|
1538 </tr> |
|
1539 </tbody> |
|
1540 </table> |
|
1541 <br> |
|
1542 The commands take the form:<br> |
|
1543 <br> |
|
1544 <table style="text-align: left; width: 100%;" border="1" cellpadding="2" |
|
1545 cellspacing="2"> |
|
1546 <tbody> |
|
1547 <tr> |
|
1548 <td style="vertical-align: top;">u1<br> |
|
1549 </td> |
|
1550 <td style="vertical-align: top;">COMMAND TAG<br> |
|
1551 </td> |
|
1552 </tr> |
|
1553 <tr> |
|
1554 <td style="vertical-align: top;">u4<br> |
|
1555 </td> |
|
1556 <td style="vertical-align: top;">serial number<br> |
|
1557 </td> |
|
1558 </tr> |
|
1559 <tr> |
|
1560 <td style="vertical-align: top;">u4<br> |
|
1561 </td> |
|
1562 <td style="vertical-align: top;">number of bytes that follow<br> |
|
1563 </td> |
|
1564 </tr> |
|
1565 <tr> |
|
1566 <td style="vertical-align: top;">[u1]*<br> |
|
1567 </td> |
|
1568 <td style="vertical-align: top;"> |
|
1569 <table style="text-align: left; width: 100%;" border="1" |
|
1570 cellpadding="2" cellspacing="2"> |
|
1571 <tbody> |
|
1572 <tr> |
|
1573 <td style="vertical-align: top;">ALLOC SITES<br> |
|
1574 </td> |
|
1575 <td style="vertical-align: top;"> |
|
1576 <table style="text-align: left; width: 100%;" border="1" |
|
1577 cellpadding="2" cellspacing="2"> |
|
1578 <tbody> |
|
1579 <tr> |
|
1580 <td style="vertical-align: top;">u2<br> |
|
1581 </td> |
|
1582 <td style="vertical-align: top;">Flags:<br> |
|
1583 </td> |
|
1584 </tr> |
|
1585 <tr> |
|
1586 <td style="vertical-align: top;">u4<br> |
|
1587 </td> |
|
1588 <td style="vertical-align: top;">cutoff ratio |
|
1589 (floating point between 0.0 and 1.0)<br> |
|
1590 </td> |
|
1591 </tr> |
|
1592 </tbody> |
|
1593 </table> |
|
1594 <br> |
|
1595 </td> |
|
1596 </tr> |
|
1597 <tr> |
|
1598 <td style="vertical-align: top;">CPU SAMPLES<br> |
|
1599 </td> |
|
1600 <td style="vertical-align: top;"> |
|
1601 <table style="text-align: left; width: 100%;" border="1" |
|
1602 cellpadding="2" cellspacing="2"> |
|
1603 <tbody> |
|
1604 <tr> |
|
1605 <td style="vertical-align: top;">u2<br> |
|
1606 </td> |
|
1607 <td style="vertical-align: top;">ignored<br> |
|
1608 </td> |
|
1609 </tr> |
|
1610 <tr> |
|
1611 <td style="vertical-align: top;">u4<br> |
|
1612 </td> |
|
1613 <td style="vertical-align: top;">cutoff ratio |
|
1614 (floating point between 0.0 and 1.0)<br> |
|
1615 </td> |
|
1616 </tr> |
|
1617 </tbody> |
|
1618 </table> |
|
1619 <br> |
|
1620 </td> |
|
1621 </tr> |
|
1622 <tr> |
|
1623 <td style="vertical-align: top;">CONTROL<br> |
|
1624 </td> |
|
1625 <td style="vertical-align: top;"> |
|
1626 <table style="text-align: left; width: 100%;" border="1" |
|
1627 cellpadding="2" cellspacing="2"> |
|
1628 <tbody> |
|
1629 <tr> |
|
1630 <td style="vertical-align: top;">u2<br> |
|
1631 </td> |
|
1632 <td style="vertical-align: top;">Sub option:<br> |
|
1633 <table style="text-align: left; width: 100%;" |
|
1634 border="1" cellpadding="2" cellspacing="2"> |
|
1635 <tbody> |
|
1636 <tr> |
|
1637 <td style="vertical-align: top;">0x1<br> |
|
1638 </td> |
|
1639 <td style="vertical-align: top;">Turn alloc |
|
1640 traces on<br> |
|
1641 </td> |
|
1642 </tr> |
|
1643 <tr> |
|
1644 <td style="vertical-align: top;">0x2<br> |
|
1645 </td> |
|
1646 <td style="vertical-align: top;">Turn alloc |
|
1647 traces off<br> |
|
1648 </td> |
|
1649 </tr> |
|
1650 <tr> |
|
1651 <td style="vertical-align: top;">0x3<br> |
|
1652 </td> |
|
1653 <td style="vertical-align: top;">Turn CPU |
|
1654 sampling on:<br> |
|
1655 <table style="text-align: left; width: 100%;" |
|
1656 border="1" cellpadding="2" cellspacing="2"> |
|
1657 <tbody> |
|
1658 <tr> |
|
1659 <td style="vertical-align: top;">ID<br> |
|
1660 </td> |
|
1661 <td style="vertical-align: top;">thread |
|
1662 object ID (0 for all threads)<br> |
|
1663 </td> |
|
1664 </tr> |
|
1665 </tbody> |
|
1666 </table> |
|
1667 <br> |
|
1668 </td> |
|
1669 </tr> |
|
1670 <tr> |
|
1671 <td style="vertical-align: top;">0x4<br> |
|
1672 </td> |
|
1673 <td style="vertical-align: top;">Turn CPU |
|
1674 sampling off:<br> |
|
1675 <table style="text-align: left; width: 100%;" |
|
1676 border="1" cellpadding="2" cellspacing="2"> |
|
1677 <tbody> |
|
1678 <tr> |
|
1679 <td style="vertical-align: top;">ID<br> |
|
1680 </td> |
|
1681 <td style="vertical-align: top;">thread |
|
1682 object ID (0 for all threads)</td> |
|
1683 </tr> |
|
1684 </tbody> |
|
1685 </table> |
|
1686 <br> |
|
1687 </td> |
|
1688 </tr> |
|
1689 <tr> |
|
1690 <td style="vertical-align: top;">0x5<br> |
|
1691 </td> |
|
1692 <td style="vertical-align: top;">Clear CPU |
|
1693 sampling<br> |
|
1694 </td> |
|
1695 </tr> |
|
1696 <tr> |
|
1697 <td style="vertical-align: top;">0x6<br> |
|
1698 </td> |
|
1699 <td style="vertical-align: top;">Set max stack |
|
1700 depth:<br> |
|
1701 <table style="text-align: left; width: 100%;" |
|
1702 border="1" cellpadding="2" cellspacing="2"> |
|
1703 <tbody> |
|
1704 <tr> |
|
1705 <td style="vertical-align: top;">u2<br> |
|
1706 </td> |
|
1707 <td style="vertical-align: top;">New max |
|
1708 stack depth<br> |
|
1709 </td> |
|
1710 </tr> |
|
1711 </tbody> |
|
1712 </table> |
|
1713 <br> |
|
1714 </td> |
|
1715 </tr> |
|
1716 </tbody> |
|
1717 </table> |
|
1718 <br> |
|
1719 </td> |
|
1720 </tr> |
|
1721 </tbody> |
|
1722 </table> |
|
1723 <br> |
|
1724 </td> |
|
1725 </tr> |
|
1726 </tbody> |
|
1727 </table> |
|
1728 </td> |
|
1729 </tr> |
|
1730 </tbody> |
|
1731 </table> |
|
1732 <br> |
|
1733 <p></p> |
|
1734 <hr><!-- hhmts start --> |
|
1735 Last modified: 2005<!-- hhmts end --> |
|
1736 </body> |
|
1737 </html> |
|