Mercurial > hg > truffle
comparison src/share/vm/oops/compiledICHolderOop.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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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 }; |