Mercurial > hg > graal-jvmci-8
view src/share/vm/ci/ciTypeArrayKlass.cpp @ 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 |
line wrap: on
line source
/* * 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. * */ #include "precompiled.hpp" #include "ci/ciTypeArrayKlass.hpp" #include "ci/ciUtilities.hpp" // ciTypeArrayKlass // // This class represents a Klass* in the HotSpot virtual machine // whose Klass part in a TypeArrayKlass. // ------------------------------------------------------------------ // ciTypeArrayKlass::ciTypeArrayKlass ciTypeArrayKlass::ciTypeArrayKlass(KlassHandle h_k) : ciArrayKlass(h_k) { assert(get_Klass()->oop_is_typeArray(), "wrong type"); assert(element_type() == get_TypeArrayKlass()->element_type(), ""); } // ------------------------------------------------------------------ // ciTypeArrayKlass::make_impl // // Implementation of make. ciTypeArrayKlass* ciTypeArrayKlass::make_impl(BasicType t) { Klass* k = Universe::typeArrayKlassObj(t); return CURRENT_ENV->get_type_array_klass(k); } // ------------------------------------------------------------------ // ciTypeArrayKlass::make // // Make an array klass corresponding to the specified primitive type. ciTypeArrayKlass* ciTypeArrayKlass::make(BasicType t) { GUARDED_VM_ENTRY(return make_impl(t);) }