Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiEnv.xsl @ 20543:e7d0505c8a30
8059758: Footprint regressions with JDK-8038423
Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything.
Reviewed-by: jwilhelm, brutisso
| author | tschatzl |
|---|---|
| date | Fri, 10 Oct 2014 15:51:58 +0200 |
| parents | da91efe96a93 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <?xml version="1.0"?> |
| 2 <!-- | |
|
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3 Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 4 DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 5 | |
| 6 This code is free software; you can redistribute it and/or modify it | |
| 7 under the terms of the GNU General Public License version 2 only, as | |
| 8 published by the Free Software Foundation. | |
| 9 | |
| 10 This code is distributed in the hope that it will be useful, but WITHOUT | |
| 11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 13 version 2 for more details (a copy is included in the LICENSE file that | |
| 14 accompanied this code). | |
| 15 | |
| 16 You should have received a copy of the GNU General Public License version | |
| 17 2 along with this work; if not, write to the Free Software Foundation, | |
| 18 Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 19 | |
|
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20 Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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21 or visit www.oracle.com if you need additional information or have any |
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22 questions. |
| 0 | 23 |
| 24 --> | |
| 25 | |
| 26 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"> | |
| 27 | |
| 28 <xsl:import href="jvmtiLib.xsl"/> | |
| 29 | |
| 30 <xsl:output method="text" indent="no" omit-xml-declaration="yes"/> | |
| 31 | |
| 32 <xsl:template match="/"> | |
| 33 <xsl:apply-templates select="specification"/> | |
| 34 </xsl:template> | |
| 35 | |
| 36 <xsl:template match="specification"> | |
| 37 <xsl:call-template name="sourceHeader"/> | |
| 38 <xsl:text> | |
| 39 | |
| 40 // end file prefix - do not modify or remove this line | |
| 41 </xsl:text> | |
| 42 <xsl:apply-templates select="functionsection"/> | |
| 43 </xsl:template> | |
| 44 | |
| 45 <xsl:template match="functionsection"> | |
| 46 <xsl:apply-templates select="category"/> | |
| 47 </xsl:template> | |
| 48 | |
| 49 <xsl:template match="category"> | |
| 50 <xsl:text> | |
| 51 // | |
| 52 // </xsl:text><xsl:value-of select="@label"/><xsl:text> functions | |
| 53 // | |
| 54 </xsl:text> | |
| 55 <xsl:apply-templates select="function[not(contains(@impl,'unimpl'))]"/> | |
| 56 </xsl:template> | |
| 57 | |
| 58 <xsl:template match="function"> | |
| 59 <xsl:apply-templates select="parameters" mode="advice"/> | |
| 60 <xsl:text> | |
| 61 jvmtiError | |
| 62 JvmtiEnv::</xsl:text> | |
| 63 <xsl:if test="count(@hide)=1"> | |
| 64 <xsl:value-of select="@hide"/> | |
| 65 </xsl:if> | |
| 66 <xsl:value-of select="@id"/> | |
| 67 <xsl:text>(</xsl:text> | |
| 68 <xsl:apply-templates select="parameters" mode="HotSpotSig"/> | |
| 69 <xsl:text>) {</xsl:text> | |
| 70 <xsl:for-each select="parameters/param/jclass"> | |
| 71 <xsl:if test="count(@method|@field)=0"> | |
| 72 <xsl:text> | |
| 73 if (java_lang_Class::is_primitive(k_mirror)) { | |
| 74 // DO PRIMITIVE CLASS PROCESSING | |
| 75 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; | |
| 76 } | |
|
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77 Klass* k_oop = java_lang_Class::as_Klass(k_mirror); |
| 0 | 78 if (k_oop == NULL) { |
| 79 return JVMTI_ERROR_INVALID_CLASS; | |
| 80 }</xsl:text> | |
| 81 </xsl:if> | |
| 82 </xsl:for-each> | |
| 83 <xsl:text> | |
| 84 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; | |
| 85 } /* end </xsl:text> | |
| 86 <xsl:if test="count(@hide)=1"> | |
| 87 <xsl:value-of select="@hide"/> | |
| 88 </xsl:if> | |
| 89 <xsl:value-of select="@id"/> | |
| 90 <xsl:text> */ | |
| 91 | |
| 92 </xsl:text> | |
| 93 </xsl:template> | |
| 94 | |
| 95 | |
| 96 <!-- ======== ADVICE ======== --> | |
| 97 | |
| 98 <xsl:template match="parameters" mode="advice"> | |
| 99 <xsl:apply-templates select="param" mode="advice"/> | |
| 100 </xsl:template> | |
| 101 | |
| 102 <xsl:template match="param" mode="advice"> | |
| 103 <xsl:apply-templates select="child::*[position()=1]" mode="advice"> | |
| 104 <xsl:with-param name="name" select="@id"/> | |
| 105 </xsl:apply-templates> | |
| 106 </xsl:template> | |
| 107 | |
| 108 <xsl:template match="jthread" mode="advice"> | |
| 109 <xsl:param name="name"/> | |
| 110 <xsl:choose> | |
| 111 <xsl:when test="count(@impl)=0 or not(contains(@impl,'noconvert'))"> | |
| 112 <xsl:text> | |
| 113 // Threads_lock NOT held, java_thread not protected by lock | |
| 114 // java_thread - pre-checked</xsl:text> | |
| 115 </xsl:when> | |
| 116 <xsl:otherwise> | |
| 117 <xsl:text> | |
| 118 // Threads_lock NOT held | |
| 119 // </xsl:text> | |
| 120 <xsl:value-of select="$name"/> | |
| 121 <xsl:text> - NOT pre-checked</xsl:text> | |
| 122 </xsl:otherwise> | |
| 123 </xsl:choose> | |
| 124 </xsl:template> | |
| 125 | |
| 126 <xsl:template match="jrawMonitorID" mode="advice"> | |
| 127 <xsl:param name="name"/> | |
| 128 <xsl:text> | |
| 129 // rmonitor - pre-checked for validity</xsl:text> | |
| 130 </xsl:template> | |
| 131 | |
| 132 <xsl:template match="jframeID" mode="advice"> | |
| 133 <xsl:param name="name"/> | |
| 134 <xsl:text> | |
| 135 // java_thread - unchecked | |
| 136 // depth - pre-checked as non-negative</xsl:text> | |
| 137 </xsl:template> | |
| 138 | |
| 139 <xsl:template match="jmethodID" mode="advice"> | |
| 140 <xsl:param name="name"/> | |
| 141 <xsl:text> | |
| 142 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method</xsl:text> | |
| 143 </xsl:template> | |
| 144 | |
| 145 <xsl:template match="jfieldID" mode="advice"> | |
| 146 <xsl:param name="name"/> | |
| 147 </xsl:template> | |
| 148 | |
| 149 <xsl:template match="jclass" mode="advice"> | |
| 150 <xsl:param name="name"/> | |
| 151 <!-- | |
| 152 classes passed as part of a class/method or class/field pair are used | |
| 153 by the wrapper to get the internal type but are not needed by nor | |
| 154 passed to the implementation layer. | |
| 155 --> | |
| 156 <xsl:if test="count(@method|@field)=0"> | |
| 157 <xsl:text> | |
| 158 // k_mirror - may be primitive, this must be checked</xsl:text> | |
| 159 </xsl:if> | |
| 160 </xsl:template> | |
| 161 | |
| 162 <xsl:template match="nullok" mode="advice"> | |
| 163 </xsl:template> | |
| 164 | |
| 165 <xsl:template match="outptr|outbuf|allocfieldbuf|ptrtype|inptr|inbuf|vmbuf|allocbuf|agentbuf|allocallocbuf" mode="advice"> | |
| 166 <xsl:param name="name"/> | |
| 167 <xsl:choose> | |
| 168 <xsl:when test="count(nullok)=0"> | |
| 169 <xsl:text> | |
| 170 // </xsl:text> | |
| 171 <xsl:value-of select="$name"/> | |
| 172 <xsl:text> - pre-checked for NULL</xsl:text> | |
| 173 </xsl:when> | |
| 174 <xsl:otherwise> | |
| 175 <xsl:text> | |
| 176 // </xsl:text> | |
| 177 <xsl:value-of select="$name"/> | |
| 178 <xsl:text> - NULL is a valid value, must be checked</xsl:text> | |
| 179 </xsl:otherwise> | |
| 180 </xsl:choose> | |
| 181 </xsl:template> | |
| 182 | |
| 183 <xsl:template match="jint" mode="advice"> | |
| 184 <xsl:param name="name"/> | |
| 185 <xsl:if test="count(@min)=1"> | |
| 186 <xsl:text> | |
| 187 // </xsl:text> | |
| 188 <xsl:value-of select="$name"/> | |
| 189 <xsl:text> - pre-checked to be greater than or equal to </xsl:text> | |
| 190 <xsl:value-of select="@min"/> | |
| 191 </xsl:if> | |
| 192 </xsl:template> | |
| 193 | |
| 194 <xsl:template match="jobject|jvalue|jthreadGroup|enum|jlong|jfloat|jdouble|jlocation|jboolean|char|uchar|size_t|void|varargs|struct" mode="advice"> | |
| 195 <xsl:param name="name"/> | |
| 196 </xsl:template> | |
| 197 | |
| 198 </xsl:stylesheet> |