Fri, 07 Sep 2012 12:04:16 -0400
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
Summary: Simple renaming to be consistent with instanceKlass->InstanceKlass renaming
Reviewed-by: stefank, jmasa
1 /*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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13 * accompanied this code).
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25 #ifndef SHARE_VM_OOPS_INSTANCEMIRRORKLASS_HPP
26 #define SHARE_VM_OOPS_INSTANCEMIRRORKLASS_HPP
28 #include "classfile/systemDictionary.hpp"
29 #include "oops/instanceKlass.hpp"
30 #include "runtime/handles.hpp"
32 // An InstanceMirrorKlass is a specialized InstanceKlass for
33 // java.lang.Class instances. These instances are special because
34 // they contain the static fields of the class in addition to the
35 // normal fields of Class. This means they are variable sized
36 // instances and need special logic for computing their size and for
37 // iteration of their oops.
40 class InstanceMirrorKlass: public InstanceKlass {
41 friend class VMStructs;
42 friend class InstanceKlass;
44 private:
45 static int _offset_of_static_fields;
47 // Constructor
48 InstanceMirrorKlass(int vtable_len, int itable_len, int static_field_size, int nonstatic_oop_map_size, ReferenceType rt, AccessFlags access_flags, bool is_anonymous)
49 : InstanceKlass(vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, access_flags, is_anonymous) {}
51 public:
52 InstanceMirrorKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }
53 // Type testing
54 bool oop_is_instanceMirror() const { return true; }
56 // Casting from Klass*
57 static InstanceMirrorKlass* cast(Klass* k) {
58 assert(k->oop_is_instanceMirror(), "cast to InstanceMirrorKlass");
59 return (InstanceMirrorKlass*) k;
60 }
62 // Returns the size of the instance including the extra static fields.
63 virtual int oop_size(oop obj) const;
65 // Static field offset is an offset into the Heap, should be converted by
66 // based on UseCompressedOop for traversal
67 static HeapWord* start_of_static_fields(oop obj) {
68 return (HeapWord*)((intptr_t)obj + offset_of_static_fields());
69 }
71 static void init_offset_of_static_fields() {
72 // Cache the offset of the static fields in the Class instance
73 assert(_offset_of_static_fields == 0, "once");
74 _offset_of_static_fields = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->size_helper() << LogHeapWordSize;
75 }
77 static int offset_of_static_fields() {
78 return _offset_of_static_fields;
79 }
81 int compute_static_oop_field_count(oop obj);
83 // Given a Klass return the size of the instance
84 int instance_size(KlassHandle k);
86 // allocation
87 instanceOop allocate_instance(KlassHandle k, TRAPS);
89 // Garbage collection
90 int oop_adjust_pointers(oop obj);
91 void oop_follow_contents(oop obj);
93 // Parallel Scavenge and Parallel Old
94 PARALLEL_GC_DECLS
96 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) {
97 return oop_oop_iterate_v(obj, blk);
98 }
99 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) {
100 return oop_oop_iterate_v_m(obj, blk, mr);
101 }
103 #define InstanceMirrorKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
104 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
105 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, MemRegion mr);
107 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceMirrorKlass_OOP_OOP_ITERATE_DECL)
108 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceMirrorKlass_OOP_OOP_ITERATE_DECL)
110 #ifndef SERIALGC
111 #define InstanceMirrorKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \
112 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk);
114 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceMirrorKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
115 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceMirrorKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
116 #endif // !SERIALGC
117 };
119 #endif // SHARE_VM_OOPS_INSTANCEMIRRORKLASS_HPP