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annotate src/share/vm/ci/ciReplay.hpp @ 18041:52b4284cb496

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Merge with jdk8u20-b26
author Gilles Duboscq <duboscq@ssw.jku.at>
date Wed, 15 Oct 2014 16:02:50 +0200
parents 4ca6dc0799b6
children
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1 /*
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_CI_CIREPLAY_HPP
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26 #define SHARE_VM_CI_CIREPLAY_HPP
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27
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28 #include "ci/ciMethod.hpp"
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29
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30 // ciReplay
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31
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32 //
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33 // Replay compilation of a java method by using an information in replay file.
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34 // Replay inlining decisions during compilation by using an information in inline file.
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35 //
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36 // NOTE: these replay functions only exist in debug version of VM.
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37 //
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38 // Replay compilation.
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39 // -------------------
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40 //
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41 // Replay data file replay.txt can be created by Serviceability Agent
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42 // from a core file, see agent/doc/cireplay.html
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43 //
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44 // $ java -cp <jdk>/lib/sa-jdi.jar sun.jvm.hotspot.CLHSDB
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45 // hsdb> attach <jdk>/bin/java ./core
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46 // hsdb> threads
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47 // t@10 Service Thread
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48 // t@9 C2 CompilerThread0
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49 // t@8 Signal Dispatcher
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50 // t@7 Finalizer
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51 // t@6 Reference Handler
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52 // t@2 main
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53 // hsdb> dumpreplaydata t@9 > replay.txt
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54 // hsdb> quit
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55 //
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56 // (Note: SA could be also used to extract app.jar and boot.jar files
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57 // from core file to replay compilation if only core file is available)
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58 //
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59 // Replay data file replay_pid%p.log is also created when VM crashes
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60 // in Compiler thread during compilation. It is controlled by
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61 // DumpReplayDataOnError flag which is ON by default.
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62 //
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63 // Replay file replay_pid%p_compid%d.log can be created
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64 // for the specified java method during normal execution using
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65 // CompileCommand option DumpReplay:
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66 //
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67 // -XX:CompileCommand=option,Benchmark::test,DumpReplay
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68 //
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69 // In this case the file name has additional compilation id "_compid%d"
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70 // because the method could be compiled several times.
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71 //
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72 // To replay compilation the replay file should be specified:
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73 //
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74 // -XX:+ReplayCompiles -XX:ReplayDataFile=replay_pid2133.log
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75 //
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76 // VM thread reads data from the file immediately after VM initialization
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77 // and puts the compilation task on compile queue. After that it goes into
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78 // wait state (BackgroundCompilation flag is set to false) since there is no
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79 // a program to execute. VM exits when the compilation is finished.
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80 //
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81 //
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82 // Replay inlining.
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83 // ----------------
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84 //
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85 // Replay inlining file inline_pid%p_compid%d.log is created for
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86 // a specific java method during normal execution of a java program
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87 // using CompileCommand option DumpInline:
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88 //
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89 // -XX:CompileCommand=option,Benchmark::test,DumpInline
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90 //
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91 // To replay inlining the replay file and the method should be specified:
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92 //
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93 // -XX:CompileCommand=option,Benchmark::test,ReplayInline -XX:InlineDataFile=inline_pid3244_compid6.log
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94 //
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95 // The difference from replay compilation is that replay inlining
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96 // is performed during normal java program execution.
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97 //
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98
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99 class ciReplay {
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100 CI_PACKAGE_ACCESS
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101
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102 #ifndef PRODUCT
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103 private:
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104 static int replay_impl(TRAPS);
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105
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106 public:
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107 // Replay specified compilation and exit VM.
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108 static void replay(TRAPS);
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109 // Load inlining decisions from file and use them
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110 // during compilation of specified method.
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111 static void* load_inline_data(ciMethod* method, int entry_bci, int comp_level);
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112
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113 // These are used by the CI to fill in the cached data from the
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114 // replay file when replaying compiles.
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115 static void initialize(ciMethodData* method);
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116 static void initialize(ciMethod* method);
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117
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118 static bool is_loaded(Method* method);
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119 static bool is_loaded(Klass* klass);
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120
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121 static bool should_not_inline(ciMethod* method);
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122 static bool should_inline(void* data, ciMethod* method, int bci, int inline_depth);
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123 static bool should_not_inline(void* data, ciMethod* method, int bci, int inline_depth);
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124
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125 #endif
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126 };
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127
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128 #endif // SHARE_VM_CI_CIREPLAY_HPP