Mercurial > hg > graal-jvmci-8
view src/share/vm/ci/ciArrayKlass.hpp @ 12110:4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
Summary: Replace the broken large pages implementation on Linux. New flag: -XX:+UseTransparentHugePages - Linux specific flag to turn on transparent huge page hinting with madvise(..., MAP_HUGETLB). Changed behavior: -XX:+UseLargePages - tries to use -XX:+UseTransparentHugePages before trying other large pages implementations (on Linux). Changed behavior: -XX:+UseHugeTLBFS - Use upfront allocation of Large Pages instead of using the broken implementation to dynamically committing large pages. Changed behavior: -XX:LargePageSizeInBytes - Turned off the ability to use this flag on Linux and provides warning to user if set to a value different than the OS chosen large page size. Changed behavior: Setting no large page size - Now defaults to use -XX:UseTransparentHugePages if the OS supports it. Previously, -XX:+UseHugeTLBFS was chosen if the OS was configured to use large pages.
Reviewed-by: tschatzl, dcubed, brutisso
author | stefank |
---|---|
date | Fri, 16 Aug 2013 13:22:32 +0200 |
parents | d8ce2825b193 |
children |
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/* * Copyright (c) 1999, 2012, 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. * */ #ifndef SHARE_VM_CI_CIARRAYKLASS_HPP #define SHARE_VM_CI_CIARRAYKLASS_HPP #include "ci/ciKlass.hpp" // ciArrayKlass // // This class, and its subclasses represent Klass*s in the // HotSpot virtual machine whose Klass part is an ArrayKlass. class ciArrayKlass : public ciKlass { CI_PACKAGE_ACCESS private: jint _dimension; protected: ciArrayKlass(KlassHandle h_k); ciArrayKlass(ciSymbol* name, int dimension, BasicType bt); ArrayKlass* get_ArrayKlass() { return (ArrayKlass*)get_Klass(); } const char* type_string() { return "ciArrayKlass"; } public: jint dimension() { return _dimension; } ciType* element_type(); // JLS calls this the "component type" ciType* base_element_type(); // JLS calls this the "element type" bool is_leaf_type(); // No subtypes of this array type. ciInstance* component_mirror() { // This is a real field in ArrayKlass, but we derive it from element_type. return element_type()->java_mirror(); } // What kind of vmObject is this? bool is_array_klass() const { return true; } bool is_java_klass() const { return true; } static ciArrayKlass* make(ciType* element_type); }; #endif // SHARE_VM_CI_CIARRAYKLASS_HPP