Mercurial > hg > truffle
view src/share/vm/prims/privilegedStack.hpp @ 8733:9def4075da6d
8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
Summary: Update the task local finger to the start of the next object when marking aborts, in order to avoid the redundant scanning of all 0's when the marking task restarts, if otherwise updating to the next word. In addition, reuse the routine nextObject() in routine iterate().
Reviewed-by: johnc, ysr
Contributed-by: tamao <tao.mao@oracle.com>
author | tamao |
---|---|
date | Tue, 05 Mar 2013 15:36:56 -0800 |
parents | da91efe96a93 |
children |
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/* * Copyright (c) 1997, 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_PRIMS_PRIVILEGEDSTACK_HPP #define SHARE_VM_PRIMS_PRIVILEGEDSTACK_HPP #include "memory/allocation.hpp" #include "oops/oopsHierarchy.hpp" #include "runtime/vframe.hpp" #include "utilities/growableArray.hpp" class PrivilegedElement VALUE_OBJ_CLASS_SPEC { private: Klass* _klass; // klass for method oop _privileged_context; // context for operation intptr_t* _frame_id; // location on stack PrivilegedElement* _next; // Link to next one on stack public: void initialize(vframeStream* vf, oop context, PrivilegedElement* next, TRAPS); void oops_do(OopClosure* f); void classes_do(KlassClosure* f); intptr_t* frame_id() const { return _frame_id; } oop privileged_context() const { return _privileged_context; } oop class_loader() const { return InstanceKlass::cast(_klass)->class_loader(); } oop protection_domain() const { return InstanceKlass::cast(_klass)->protection_domain(); } PrivilegedElement *next() const { return _next; } // debugging (used for find) void print_on(outputStream* st) const PRODUCT_RETURN; bool contains(address addr) PRODUCT_RETURN0; }; #endif // SHARE_VM_PRIMS_PRIVILEGEDSTACK_HPP