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view src/share/vm/prims/jvmtiEnv.xsl @ 3992:d1bdeef3e3e2
7098282: G1: assert(interval >= 0) failed: Sanity check, referencePolicy.cpp: 76
Summary: There is a race between one thread successfully forwarding and copying the klass mirror for the SoftReference class (including the static master clock) and another thread attempting to use the master clock while attempting to discover a soft reference object. Maintain a shadow copy of the soft reference master clock and use the shadow during reference discovery and reference processing.
Reviewed-by: tonyp, brutisso, ysr
author | johnc |
---|---|
date | Wed, 12 Oct 2011 10:25:51 -0700 |
parents | f95d63e2154a |
children | da91efe96a93 |
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<?xml version="1.0"?> <!-- Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. This code is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 only, as published by the Free Software Foundation. This code is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License version 2 for more details (a copy is included in the LICENSE file that accompanied this code). You should have received a copy of the GNU General Public License version 2 along with this work; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA or visit www.oracle.com if you need additional information or have any questions. --> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"> <xsl:import href="jvmtiLib.xsl"/> <xsl:output method="text" indent="no" omit-xml-declaration="yes"/> <xsl:template match="/"> <xsl:apply-templates select="specification"/> </xsl:template> <xsl:template match="specification"> <xsl:call-template name="sourceHeader"/> <xsl:text> // end file prefix - do not modify or remove this line </xsl:text> <xsl:apply-templates select="functionsection"/> </xsl:template> <xsl:template match="functionsection"> <xsl:apply-templates select="category"/> </xsl:template> <xsl:template match="category"> <xsl:text> // // </xsl:text><xsl:value-of select="@label"/><xsl:text> functions // </xsl:text> <xsl:apply-templates select="function[not(contains(@impl,'unimpl'))]"/> </xsl:template> <xsl:template match="function"> <xsl:apply-templates select="parameters" mode="advice"/> <xsl:text> jvmtiError JvmtiEnv::</xsl:text> <xsl:if test="count(@hide)=1"> <xsl:value-of select="@hide"/> </xsl:if> <xsl:value-of select="@id"/> <xsl:text>(</xsl:text> <xsl:apply-templates select="parameters" mode="HotSpotSig"/> <xsl:text>) {</xsl:text> <xsl:for-each select="parameters/param/jclass"> <xsl:if test="count(@method|@field)=0"> <xsl:text> if (java_lang_Class::is_primitive(k_mirror)) { // DO PRIMITIVE CLASS PROCESSING return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; } klassOop k_oop = java_lang_Class::as_klassOop(k_mirror); if (k_oop == NULL) { return JVMTI_ERROR_INVALID_CLASS; }</xsl:text> </xsl:if> </xsl:for-each> <xsl:text> return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; } /* end </xsl:text> <xsl:if test="count(@hide)=1"> <xsl:value-of select="@hide"/> </xsl:if> <xsl:value-of select="@id"/> <xsl:text> */ </xsl:text> </xsl:template> <!-- ======== ADVICE ======== --> <xsl:template match="parameters" mode="advice"> <xsl:apply-templates select="param" mode="advice"/> </xsl:template> <xsl:template match="param" mode="advice"> <xsl:apply-templates select="child::*[position()=1]" mode="advice"> <xsl:with-param name="name" select="@id"/> </xsl:apply-templates> </xsl:template> <xsl:template match="jthread" mode="advice"> <xsl:param name="name"/> <xsl:choose> <xsl:when test="count(@impl)=0 or not(contains(@impl,'noconvert'))"> <xsl:text> // Threads_lock NOT held, java_thread not protected by lock // java_thread - pre-checked</xsl:text> </xsl:when> <xsl:otherwise> <xsl:text> // Threads_lock NOT held // </xsl:text> <xsl:value-of select="$name"/> <xsl:text> - NOT pre-checked</xsl:text> </xsl:otherwise> </xsl:choose> </xsl:template> <xsl:template match="jrawMonitorID" mode="advice"> <xsl:param name="name"/> <xsl:text> // rmonitor - pre-checked for validity</xsl:text> </xsl:template> <xsl:template match="jframeID" mode="advice"> <xsl:param name="name"/> <xsl:text> // java_thread - unchecked // depth - pre-checked as non-negative</xsl:text> </xsl:template> <xsl:template match="jmethodID" mode="advice"> <xsl:param name="name"/> <xsl:text> // method_oop - pre-checked for validity, but may be NULL meaning obsolete method</xsl:text> </xsl:template> <xsl:template match="jfieldID" mode="advice"> <xsl:param name="name"/> </xsl:template> <xsl:template match="jclass" mode="advice"> <xsl:param name="name"/> <!-- classes passed as part of a class/method or class/field pair are used by the wrapper to get the internal type but are not needed by nor passed to the implementation layer. --> <xsl:if test="count(@method|@field)=0"> <xsl:text> // k_mirror - may be primitive, this must be checked</xsl:text> </xsl:if> </xsl:template> <xsl:template match="nullok" mode="advice"> </xsl:template> <xsl:template match="outptr|outbuf|allocfieldbuf|ptrtype|inptr|inbuf|vmbuf|allocbuf|agentbuf|allocallocbuf" mode="advice"> <xsl:param name="name"/> <xsl:choose> <xsl:when test="count(nullok)=0"> <xsl:text> // </xsl:text> <xsl:value-of select="$name"/> <xsl:text> - pre-checked for NULL</xsl:text> </xsl:when> <xsl:otherwise> <xsl:text> // </xsl:text> <xsl:value-of select="$name"/> <xsl:text> - NULL is a valid value, must be checked</xsl:text> </xsl:otherwise> </xsl:choose> </xsl:template> <xsl:template match="jint" mode="advice"> <xsl:param name="name"/> <xsl:if test="count(@min)=1"> <xsl:text> // </xsl:text> <xsl:value-of select="$name"/> <xsl:text> - pre-checked to be greater than or equal to </xsl:text> <xsl:value-of select="@min"/> </xsl:if> </xsl:template> <xsl:template match="jobject|jvalue|jthreadGroup|enum|jlong|jfloat|jdouble|jlocation|jboolean|char|uchar|size_t|void|varargs|struct" mode="advice"> <xsl:param name="name"/> </xsl:template> </xsl:stylesheet>