8186042: Optimize OopMapCache lookup
Summary: Use lock free access to oopMapCache
Reviewed-by: dholmes, sspitsyn
Contributed-by: frederic.parain@oracle.com, coleen.phillimore@oracle.com
/* * Copyright (c) 2015, 2016, 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_OBJARRAYOOP_INLINE_HPP#define SHARE_VM_OOPS_OBJARRAYOOP_INLINE_HPP#include "oops/objArrayOop.hpp"#include "oops/oop.inline.hpp"#include "runtime/globals.hpp"inline oop objArrayOopDesc::obj_at(int index) const { // With UseCompressedOops decode the narrow oop in the objArray to an // uncompressed oop. Otherwise this is simply a "*" operator. if (UseCompressedOops) { return load_decode_heap_oop(obj_at_addr<narrowOop>(index)); } else { return load_decode_heap_oop(obj_at_addr<oop>(index)); }}void objArrayOopDesc::obj_at_put(int index, oop value) { if (UseCompressedOops) { oop_store(obj_at_addr<narrowOop>(index), value); } else { oop_store(obj_at_addr<oop>(index), value); }}#endif // SHARE_VM_OOPS_OBJARRAYOOP_INLINE_HPP