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/*
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* Copyright 1998-2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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// A compiledICHolderOop is a helper object for the inline cache implementation.
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// It holds an intermediate value (method+klass pair) used when converting from
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// compiled to an interpreted call.
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//
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// compiledICHolderOops are always allocated permanent (to avoid traversing the
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// codeCache during scavenge).
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class compiledICHolderOopDesc : public oopDesc {
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friend class VMStructs;
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private:
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methodOop _holder_method;
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klassOop _holder_klass; // to avoid name conflict with oopDesc::_klass
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public:
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// accessors
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methodOop holder_method() const { return _holder_method; }
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klassOop holder_klass() const { return _holder_klass; }
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void set_holder_method(methodOop m) { oop_store_without_check((oop*)&_holder_method, (oop)m); }
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void set_holder_klass(klassOop k) { oop_store_without_check((oop*)&_holder_klass, (oop)k); }
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static int header_size() { return sizeof(compiledICHolderOopDesc)/HeapWordSize; }
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static int object_size() { return align_object_size(header_size()); }
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// interpreter support (offsets in bytes)
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static int holder_method_offset() { return offset_of(compiledICHolderOopDesc, _holder_method); }
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static int holder_klass_offset() { return offset_of(compiledICHolderOopDesc, _holder_klass); }
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// GC support
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oop* adr_holder_method() const { return (oop*)&_holder_method; }
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oop* adr_holder_klass() const { return (oop*)&_holder_klass; }
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};
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