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comparison src/share/vm/oops/compiledICHolderOop.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1998-2004 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 // A compiledICHolderOop is a helper object for the inline cache implementation.
26 // It holds an intermediate value (method+klass pair) used when converting from
27 // compiled to an interpreted call.
28 //
29 // compiledICHolderOops are always allocated permanent (to avoid traversing the
30 // codeCache during scavenge).
31
32
33 class compiledICHolderOopDesc : public oopDesc {
34 friend class VMStructs;
35 private:
36 methodOop _holder_method;
37 klassOop _holder_klass; // to avoid name conflict with oopDesc::_klass
38 public:
39 // accessors
40 methodOop holder_method() const { return _holder_method; }
41 klassOop holder_klass() const { return _holder_klass; }
42
43 void set_holder_method(methodOop m) { oop_store_without_check((oop*)&_holder_method, (oop)m); }
44 void set_holder_klass(klassOop k) { oop_store_without_check((oop*)&_holder_klass, (oop)k); }
45
46 static int header_size() { return sizeof(compiledICHolderOopDesc)/HeapWordSize; }
47 static int object_size() { return align_object_size(header_size()); }
48
49 // interpreter support (offsets in bytes)
50 static int holder_method_offset() { return offset_of(compiledICHolderOopDesc, _holder_method); }
51 static int holder_klass_offset() { return offset_of(compiledICHolderOopDesc, _holder_klass); }
52
53 // GC support
54 oop* adr_holder_method() const { return (oop*)&_holder_method; }
55 oop* adr_holder_klass() const { return (oop*)&_holder_klass; }
56 };