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comparison src/share/vm/oops/objArrayKlass.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 1997-2007 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 // objArrayKlass is the klass for objArrays
26
27 class objArrayKlass : public arrayKlass {
28 friend class VMStructs;
29 private:
30 klassOop _element_klass; // The klass of the elements of this array type
31 klassOop _bottom_klass; // The one-dimensional type (instanceKlass or typeArrayKlass)
32 public:
33 // Instance variables
34 klassOop element_klass() const { return _element_klass; }
35 void set_element_klass(klassOop k) { oop_store_without_check((oop*) &_element_klass, (oop) k); }
36 oop* element_klass_addr() { return (oop*)&_element_klass; }
37
38 klassOop bottom_klass() const { return _bottom_klass; }
39 void set_bottom_klass(klassOop k) { oop_store_without_check((oop*) &_bottom_klass, (oop) k); }
40 oop* bottom_klass_addr() { return (oop*)&_bottom_klass; }
41
42 // Compiler/Interpreter offset
43 static int element_klass_offset_in_bytes() { return offset_of(objArrayKlass, _element_klass); }
44
45 // Dispatched operation
46 bool can_be_primary_super_slow() const;
47 objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS);
48 bool compute_is_subtype_of(klassOop k);
49 bool oop_is_objArray_slow() const { return true; }
50 int oop_size(oop obj) const;
51 int klass_oop_size() const { return object_size(); }
52
53 // Allocation
54 DEFINE_ALLOCATE_PERMANENT(objArrayKlass);
55 objArrayOop allocate(int length, TRAPS);
56 oop multi_allocate(int rank, jint* sizes, TRAPS);
57
58 // Copying
59 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
60
61 // Compute protection domain
62 oop protection_domain() { return Klass::cast(bottom_klass())->protection_domain(); }
63 // Compute class loader
64 oop class_loader() const { return Klass::cast(bottom_klass())->class_loader(); }
65
66 protected:
67 // Returns the objArrayKlass for n'th dimension.
68 virtual klassOop array_klass_impl(bool or_null, int n, TRAPS);
69
70 // Returns the array class with this class as element type.
71 virtual klassOop array_klass_impl(bool or_null, TRAPS);
72
73 public:
74 // Casting from klassOop
75 static objArrayKlass* cast(klassOop k) {
76 assert(k->klass_part()->oop_is_objArray_slow(), "cast to objArrayKlass");
77 return (objArrayKlass*) k->klass_part();
78 }
79
80 // Sizing
81 static int header_size() { return oopDesc::header_size() + sizeof(objArrayKlass)/HeapWordSize; }
82 int object_size() const { return arrayKlass::object_size(header_size()); }
83
84 // Initialization (virtual from Klass)
85 void initialize(TRAPS);
86
87 // Garbage collection
88 void oop_follow_contents(oop obj);
89 int oop_adjust_pointers(oop obj);
90
91 // Parallel Scavenge and Parallel Old
92 PARALLEL_GC_DECLS
93
94 // Iterators
95 int oop_oop_iterate(oop obj, OopClosure* blk) {
96 return oop_oop_iterate_v(obj, blk);
97 }
98 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
99 return oop_oop_iterate_v_m(obj, blk, mr);
100 }
101 #define ObjArrayKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
102 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
103 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \
104 MemRegion mr);
105
106 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DECL)
107 ALL_OOP_OOP_ITERATE_CLOSURES_3(ObjArrayKlass_OOP_OOP_ITERATE_DECL)
108
109 // JVM support
110 jint compute_modifier_flags(TRAPS) const;
111
112 private:
113 static klassOop array_klass_impl (objArrayKlassHandle this_oop, bool or_null, int n, TRAPS);
114
115 #ifndef PRODUCT
116 public:
117 // Printing
118 void oop_print_on (oop obj, outputStream* st);
119 void oop_print_value_on(oop obj, outputStream* st);
120 #endif
121
122 public:
123 // Verification
124 const char* internal_name() const;
125 void oop_verify_on(oop obj, outputStream* st);
126 void oop_verify_old_oop(oop obj, oop* p, bool allow_dirty);
127
128 };