27
28 #include "oops/arrayKlass.hpp"
29 #include "utilities/macros.hpp"
30
31 class ClassLoaderData;
32
33 // ObjArrayKlass is the klass for objArrays
34
35 class ObjArrayKlass : public ArrayKlass {
36 friend class Deoptimization;
37 friend class JVMCIVMStructs;
38 friend class oopFactory;
39 friend class VMStructs;
40
41 public:
42 static const KlassKind Kind = ObjArrayKlassKind;
43
44 private:
45 // If you add a new field that points to any metaspace object, you
46 // must add this field to ObjArrayKlass::metaspace_pointers_do().
47 Klass* _element_klass; // The klass of the elements of this array type
48 Klass* _bottom_klass; // The one-dimensional type (InstanceKlass or TypeArrayKlass)
49
50 // Constructor
51 ObjArrayKlass(int n, Klass* element_klass, Symbol* name);
52 static ObjArrayKlass* allocate_klass(ClassLoaderData* loader_data, int n, Klass* k, Symbol* name, TRAPS);
53
54 objArrayOop allocate_instance(int length, TRAPS);
55
56 protected:
57 // Create array_name for element klass
58 static Symbol* create_element_klass_array_name(JavaThread* current, Klass* element_klass);
59
60 public:
61 // For dummy objects
62 ObjArrayKlass() {}
63
64 // Instance variables
65 Klass* element_klass() const { return _element_klass; }
66 void set_element_klass(Klass* k) { _element_klass = k; }
67
68 // Compiler/Interpreter offset
69 static ByteSize element_klass_offset() { return byte_offset_of(ObjArrayKlass, _element_klass); }
70
71 Klass* bottom_klass() const { return _bottom_klass; }
72 void set_bottom_klass(Klass* k) { _bottom_klass = k; }
73 Klass** bottom_klass_addr() { return &_bottom_klass; }
74
75 ModuleEntry* module() const override;
76 PackageEntry* package() const override;
77
78 // Dispatched operation
79 bool can_be_primary_super_slow() const override;
80 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots,
81 Array<InstanceKlass*>* transitive_interfaces) override;
82 DEBUG_ONLY(bool is_objArray_klass_slow() const override { return true; })
83 size_t oop_size(oop obj) const override;
84
85 // Allocation
86 static ObjArrayKlass* allocate_objArray_klass(ClassLoaderData* loader_data,
87 int n, Klass* element_klass, TRAPS);
88
89 oop multi_allocate(int rank, jint* sizes, TRAPS) override;
90
91 // Copying
92 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) override;
93
94 // Compute protection domain
95 oop protection_domain() const override { return bottom_klass()->protection_domain(); }
96
97 virtual void metaspace_pointers_do(MetaspaceClosure* iter) override;
98
99 private:
100 // Either oop or narrowOop depending on UseCompressedOops.
101 // must be called from within ObjArrayKlass.cpp
102 void do_copy(arrayOop s, size_t src_offset,
103 arrayOop d, size_t dst_offset,
104 int length, TRAPS);
105 public:
106 static ObjArrayKlass* cast(Klass* k) {
107 return const_cast<ObjArrayKlass*>(cast(const_cast<const Klass*>(k)));
108 }
109
110 static const ObjArrayKlass* cast(const Klass* k) {
111 assert(k->is_objArray_klass(), "cast to ObjArrayKlass");
112 return static_cast<const ObjArrayKlass*>(k);
113 }
114
115 // Sizing
116 static int header_size() { return sizeof(ObjArrayKlass)/wordSize; }
117 int size() const override { return ArrayKlass::static_size(header_size()); }
118
119 // Initialization (virtual from Klass)
120 void initialize(TRAPS) override;
121
122 // Oop fields (and metadata) iterators
123 //
124 // The ObjArrayKlass iterators also visits the Object's klass.
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27
28 #include "oops/arrayKlass.hpp"
29 #include "utilities/macros.hpp"
30
31 class ClassLoaderData;
32
33 // ObjArrayKlass is the klass for objArrays
34
35 class ObjArrayKlass : public ArrayKlass {
36 friend class Deoptimization;
37 friend class JVMCIVMStructs;
38 friend class oopFactory;
39 friend class VMStructs;
40
41 public:
42 static const KlassKind Kind = ObjArrayKlassKind;
43
44 private:
45 // If you add a new field that points to any metaspace object, you
46 // must add this field to ObjArrayKlass::metaspace_pointers_do().
47 Klass* _bottom_klass; // The one-dimensional type (InstanceKlass or TypeArrayKlass)
48 protected:
49 Klass* _element_klass; // The klass of the elements of this array type
50 ObjArrayKlass* _next_refined_array_klass;
51
52 protected:
53 // Constructor
54 ObjArrayKlass(int n, Klass* element_klass, Symbol* name, KlassKind kind, ArrayKlass::ArrayProperties props, markWord mw);
55 static ObjArrayKlass* allocate_klass(ClassLoaderData* loader_data, int n, Klass* k, Symbol* name, ArrayKlass::ArrayProperties props, TRAPS);
56
57 static ArrayDescription array_layout_selection(Klass* element, ArrayProperties properties);
58 ObjArrayKlass* allocate_klass_with_properties(ArrayKlass::ArrayProperties props, TRAPS);
59 virtual objArrayOop allocate_instance(int length, ArrayProperties props, TRAPS);
60
61 // Create array_name for element klass
62 static Symbol* create_element_klass_array_name(JavaThread* current, Klass* element_klass);
63
64 public:
65 // For dummy objects
66 ObjArrayKlass() {}
67
68 virtual Klass* element_klass() const { return _element_klass; }
69 virtual void set_element_klass(Klass* k) { _element_klass = k; }
70
71
72 ObjArrayKlass* next_refined_array_klass() const { return _next_refined_array_klass; }
73 inline ObjArrayKlass* next_refined_array_klass_acquire() const;
74 void set_next_refined_klass_klass(ObjArrayKlass* ak) { _next_refined_array_klass = ak; }
75 inline void release_set_next_refined_klass(ObjArrayKlass* ak);
76 ObjArrayKlass* klass_with_properties(ArrayKlass::ArrayProperties properties, TRAPS);
77 static ByteSize next_refined_array_klass_offset() { return byte_offset_of(ObjArrayKlass, _next_refined_array_klass); }
78
79 // Compiler/Interpreter offset
80 static ByteSize element_klass_offset() { return byte_offset_of(ObjArrayKlass, _element_klass); }
81
82 Klass* bottom_klass() const { return _bottom_klass; }
83 void set_bottom_klass(Klass* k) { _bottom_klass = k; }
84 Klass** bottom_klass_addr() { return &_bottom_klass; }
85
86 ModuleEntry* module() const override;
87 PackageEntry* package() const override;
88
89 // Dispatched operation
90 bool can_be_primary_super_slow() const override;
91 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots,
92 Array<InstanceKlass*>* transitive_interfaces) override;
93 DEBUG_ONLY(bool is_objArray_klass_slow() const override { return true; })
94 size_t oop_size(oop obj) const override;
95
96 // Allocation
97 static ObjArrayKlass* allocate_objArray_klass(ClassLoaderData* loader_data,
98 int n, Klass* element_klass, TRAPS);
99
100 oop multi_allocate(int rank, jint* sizes, TRAPS) override;
101
102 // Copying
103 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) override;
104
105 // Compute protection domain
106 oop protection_domain() const override { return bottom_klass()->protection_domain(); }
107
108 void metaspace_pointers_do(MetaspaceClosure* iter) override;
109
110 #if INCLUDE_CDS
111 void remove_unshareable_info() override;
112 void remove_java_mirror() override;
113 void restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain, TRAPS);
114 #endif
115
116 public:
117 static ObjArrayKlass* cast(Klass* k) {
118 return const_cast<ObjArrayKlass*>(cast(const_cast<const Klass*>(k)));
119 }
120
121 static const ObjArrayKlass* cast(const Klass* k) {
122 assert(k->is_objArray_klass(), "cast to ObjArrayKlass");
123 return static_cast<const ObjArrayKlass*>(k);
124 }
125
126 // Sizing
127 static int header_size() { return sizeof(ObjArrayKlass)/wordSize; }
128 int size() const override { return ArrayKlass::static_size(header_size()); }
129
130 // Initialization (virtual from Klass)
131 void initialize(TRAPS) override;
132
133 // Oop fields (and metadata) iterators
134 //
135 // The ObjArrayKlass iterators also visits the Object's klass.
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