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src/hotspot/share/gc/shared/accessBarrierSupport.cpp
40 строк
2 KB
Erik Österlund
8189871: Refactor GC barriers to use declarative semantics
20 ноя 2017, 15:07
20 ноя 2017, 15:07
3e5e2f0
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/* * Copyright (c) 2017, 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 "classfile/javaClasses.inline.hpp" #include "gc/shared/accessBarrierSupport.inline.hpp" #include "oops/access.hpp" DecoratorSet AccessBarrierSupport::resolve_unknown_oop_ref_strength(DecoratorSet decorators, oop base, ptrdiff_t offset) { DecoratorSet ds = decorators & ~ON_UNKNOWN_OOP_REF; if (!java_lang_ref_Reference::is_referent_field(base, offset)) { ds |= ON_STRONG_OOP_REF; } else if (java_lang_ref_Reference::is_phantom(base)) { ds |= ON_PHANTOM_OOP_REF; } else { ds |= ON_WEAK_OOP_REF; } return ds; }