Mercurial > hg > graal-jvmci-8
view src/share/vm/oops/annotations.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 | 927a311d00f9 |
children |
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/* * Copyright (c) 2012, 2013, 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_OOPS_ANNOTATIONS_HPP #define SHARE_VM_OOPS_ANNOTATIONS_HPP #include "oops/metadata.hpp" #include "runtime/handles.hpp" #include "utilities/array.hpp" #include "utilities/exceptions.hpp" #include "utilities/globalDefinitions.hpp" class ClassLoaderData; class outputStream; class KlassSizeStats; typedef Array<u1> AnnotationArray; // Class to hold the various types of annotations. The only metadata that points // to this is InstanceKlass, or another Annotations instance if this is a // a type_annotation instance. class Annotations: public MetaspaceObj { // Annotations for this class, or null if none. AnnotationArray* _class_annotations; // Annotation objects (byte arrays) for fields, or null if no annotations. // Indices correspond to entries (not indices) in fields array. Array<AnnotationArray*>* _fields_annotations; // Type annotations for this class, or null if none. AnnotationArray* _class_type_annotations; Array<AnnotationArray*>* _fields_type_annotations; public: // Allocate instance of this class static Annotations* allocate(ClassLoaderData* loader_data, TRAPS); static void free_contents(ClassLoaderData* loader_data, Array<AnnotationArray*>* p); void deallocate_contents(ClassLoaderData* loader_data); DEBUG_ONLY(bool on_stack() { return false; }) // for template // Sizing (in words) static int size() { return sizeof(Annotations) / wordSize; } #if INCLUDE_SERVICES void collect_statistics(KlassSizeStats *sz) const; #endif // Constructor to initialize to null Annotations() : _class_annotations(NULL), _fields_annotations(NULL), _class_type_annotations(NULL), _fields_type_annotations(NULL) {} AnnotationArray* class_annotations() const { return _class_annotations; } Array<AnnotationArray*>* fields_annotations() const { return _fields_annotations; } AnnotationArray* class_type_annotations() const { return _class_type_annotations; } Array<AnnotationArray*>* fields_type_annotations() const { return _fields_type_annotations; } void set_class_annotations(AnnotationArray* md) { _class_annotations = md; } void set_fields_annotations(Array<AnnotationArray*>* md) { _fields_annotations = md; } void set_class_type_annotations(AnnotationArray* cta) { _class_type_annotations = cta; } void set_fields_type_annotations(Array<AnnotationArray*>* fta) { _fields_type_annotations = fta; } // Turn metadata annotations into a Java heap object (oop) static typeArrayOop make_java_array(AnnotationArray* annotations, TRAPS); bool is_klass() const { return false; } private: static julong count_bytes(Array<AnnotationArray*>* p); public: const char* internal_name() const { return "{constant pool}"; } #ifndef PRODUCT void print_on(outputStream* st) const; #endif void print_value_on(outputStream* st) const; }; #endif // SHARE_VM_OOPS_ANNOTATIONS_HPP