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annotate src/share/vm/code/jvmticmlr.h @ 10408:836a62f43af9

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Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
author Doug Simon <doug.simon@oracle.com>
date Wed, 19 Jun 2013 10:45:56 +0200
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1 /*
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2 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation. Oracle designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Oracle in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
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23 * questions.
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24 */
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25
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26 /*
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27 * This header file defines the data structures sent by the VM
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28 * through the JVMTI CompiledMethodLoad callback function via the
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29 * "void * compile_info" parameter. The memory pointed to by the
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30 * compile_info parameter may not be referenced after returning from
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31 * the CompiledMethodLoad callback. These are VM implementation
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32 * specific data structures that may evolve in future releases. A
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33 * JVMTI agent should interpret a non-NULL compile_info as a pointer
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34 * to a region of memory containing a list of records. In a typical
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35 * usage scenario, a JVMTI agent would cast each record to a
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36 * jvmtiCompiledMethodLoadRecordHeader, a struct that represents
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37 * arbitrary information. This struct contains a kind field to indicate
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38 * the kind of information being passed, and a pointer to the next
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39 * record. If the kind field indicates inlining information, then the
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40 * agent would cast the record to a jvmtiCompiledMethodLoadInlineRecord.
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41 * This record contains an array of PCStackInfo structs, which indicate
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42 * for every pc address what are the methods on the invocation stack.
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43 * The "methods" and "bcis" fields in each PCStackInfo struct specify a
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44 * 1-1 mapping between these inlined methods and their bytecode indices.
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45 * This can be used to derive the proper source lines of the inlined
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46 * methods.
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47 */
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48
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49 #ifndef _JVMTI_CMLR_H_
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50 #define _JVMTI_CMLR_H_
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51
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52 enum {
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53 JVMTI_CMLR_MAJOR_VERSION_1 = 0x00000001,
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54 JVMTI_CMLR_MINOR_VERSION_0 = 0x00000000,
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55
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56 JVMTI_CMLR_MAJOR_VERSION = 0x00000001,
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57 JVMTI_CMLR_MINOR_VERSION = 0x00000000
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58
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59 /*
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60 * This comment is for the "JDK import from HotSpot" sanity check:
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61 * version: 1.0.0
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62 */
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63 };
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64
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65 typedef enum {
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66 JVMTI_CMLR_DUMMY = 1,
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67 JVMTI_CMLR_INLINE_INFO = 2
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68 } jvmtiCMLRKind;
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69
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70 /*
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71 * Record that represents arbitrary information passed through JVMTI
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72 * CompiledMethodLoadEvent void pointer.
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73 */
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74 typedef struct _jvmtiCompiledMethodLoadRecordHeader {
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75 jvmtiCMLRKind kind; /* id for the kind of info passed in the record */
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76 jint majorinfoversion; /* major and minor info version values. Init'ed */
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77 jint minorinfoversion; /* to current version value in jvmtiExport.cpp. */
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78
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79 struct _jvmtiCompiledMethodLoadRecordHeader* next;
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80 } jvmtiCompiledMethodLoadRecordHeader;
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81
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82 /*
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83 * Record that gives information about the methods on the compile-time
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84 * stack at a specific pc address of a compiled method. Each element in
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85 * the methods array maps to same element in the bcis array.
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86 */
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87 typedef struct _PCStackInfo {
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88 void* pc; /* the pc address for this compiled method */
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89 jint numstackframes; /* number of methods on the stack */
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90 jmethodID* methods; /* array of numstackframes method ids */
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91 jint* bcis; /* array of numstackframes bytecode indices */
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92 } PCStackInfo;
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93
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94 /*
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95 * Record that contains inlining information for each pc address of
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96 * an nmethod.
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97 */
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98 typedef struct _jvmtiCompiledMethodLoadInlineRecord {
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99 jvmtiCompiledMethodLoadRecordHeader header; /* common header for casting */
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100 jint numpcs; /* number of pc descriptors in this nmethod */
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101 PCStackInfo* pcinfo; /* array of numpcs pc descriptors */
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102 } jvmtiCompiledMethodLoadInlineRecord;
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103
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104 /*
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105 * Dummy record used to test that we can pass records with different
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106 * information through the void pointer provided that they can be cast
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107 * to a jvmtiCompiledMethodLoadRecordHeader.
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108 */
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109
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110 typedef struct _jvmtiCompiledMethodLoadDummyRecord {
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111 jvmtiCompiledMethodLoadRecordHeader header; /* common header for casting */
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112 char message[50];
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113 } jvmtiCompiledMethodLoadDummyRecord;
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114
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115 #endif