a0da47fd66
Copyright year updated for files modified during 2013 Reviewed-by: twisti, iveresov
55 lines
2.0 KiB
C++
55 lines
2.0 KiB
C++
/*
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* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_VM_OOPS_INSTANCEOOP_HPP
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#define SHARE_VM_OOPS_INSTANCEOOP_HPP
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#include "oops/oop.hpp"
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// An instanceOop is an instance of a Java Class
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// Evaluating "new HashTable()" will create an instanceOop.
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class instanceOopDesc : public oopDesc {
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public:
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// aligned header size.
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static int header_size() { return sizeof(instanceOopDesc)/HeapWordSize; }
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// If compressed, the offset of the fields of the instance may not be aligned.
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static int base_offset_in_bytes() {
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// offset computation code breaks if UseCompressedClassPointers
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// only is true
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return (UseCompressedOops && UseCompressedClassPointers) ?
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klass_gap_offset_in_bytes() :
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sizeof(instanceOopDesc);
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}
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static bool contains_field_offset(int offset, int nonstatic_field_size) {
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int base_in_bytes = base_offset_in_bytes();
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return (offset >= base_in_bytes &&
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(offset-base_in_bytes) < nonstatic_field_size * heapOopSize);
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}
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};
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#endif // SHARE_VM_OOPS_INSTANCEOOP_HPP
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