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

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 1997-2006 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 klassKlass serves as the fix point of the klass chain.
26 // The klass of klassKlass is itself.
27
28 class klassKlass: public Klass {
29 friend class VMStructs;
30 private:
31 juint _alloc_size; // allocation profiling support
32 public:
33 // Testing
34 bool oop_is_klass() const { return true; }
35 bool is_leaf_class() const { return true; }
36
37 // Sizing
38 int oop_size(oop obj) const;
39 int klass_oop_size() const { return object_size(); }
40
41 // Allocation
42 DEFINE_ALLOCATE_PERMANENT(klassKlass);
43 static klassOop create_klass(TRAPS );
44
45 // Casting from klassOop
46 static klassKlass* cast(klassOop k) {
47 assert(k->klass_part()->oop_is_klass(), "cast to klassKlass");
48 return (klassKlass*) k->klass_part();
49 }
50
51 // Sizing
52 static int header_size() { return oopDesc::header_size() + sizeof(klassKlass)/HeapWordSize; }
53 int object_size() const { return align_object_size(header_size()); }
54
55 // Garbage collection
56 void oop_follow_contents(oop obj);
57 int oop_adjust_pointers(oop obj);
58
59 // Parallel Scavenge and Parallel Old
60 PARALLEL_GC_DECLS
61
62 // Iterators
63 int oop_oop_iterate(oop obj, OopClosure* blk);
64 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr);
65
66 // Allocation profiling support
67 juint alloc_size() const { return _alloc_size; }
68 void set_alloc_size(juint n) { _alloc_size = n; }
69
70 #ifndef PRODUCT
71 public:
72 // Printing
73 void oop_print_on (oop obj, outputStream* st);
74 void oop_print_value_on(oop obj, outputStream* st);
75 #endif
76
77 public:
78 // Verification
79 const char* internal_name() const;
80 void oop_verify_on(oop obj, outputStream* st);
81 };