19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_OOPS_OBJARRAYKLASS_HPP
26 #define SHARE_OOPS_OBJARRAYKLASS_HPP
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 oopFactory;
38 friend class VMStructs;
39
40 public:
41 static const KlassKind Kind = ObjArrayKlassKind;
42
43 private:
44 // If you add a new field that points to any metaspace object, you
45 // must add this field to ObjArrayKlass::metaspace_pointers_do().
46 Klass* _element_klass; // The klass of the elements of this array type
47 Klass* _bottom_klass; // The one-dimensional type (InstanceKlass or TypeArrayKlass)
48
49 // Constructor
50 ObjArrayKlass(int n, Klass* element_klass, Symbol* name);
51 static ObjArrayKlass* allocate_klass(ClassLoaderData* loader_data, int n, Klass* k, Symbol* name, TRAPS);
52
53 objArrayOop allocate_instance(int length, TRAPS);
54
55 protected:
56 // Create array_name for element klass
57 static Symbol* create_element_klass_array_name(JavaThread* current, Klass* element_klass);
58
59 public:
60 // For dummy objects
61 ObjArrayKlass() {}
62
63 // Instance variables
64 Klass* element_klass() const { return _element_klass; }
65 void set_element_klass(Klass* k) { _element_klass = k; }
66
67 // Compiler/Interpreter offset
68 static ByteSize element_klass_offset() { return byte_offset_of(ObjArrayKlass, _element_klass); }
69
70 Klass* bottom_klass() const { return _bottom_klass; }
71 void set_bottom_klass(Klass* k) { _bottom_klass = k; }
72 Klass** bottom_klass_addr() { return &_bottom_klass; }
73
74 ModuleEntry* module() const override;
75 PackageEntry* package() const override;
76
77 // Dispatched operation
78 bool can_be_primary_super_slow() const override;
79 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots,
80 Array<InstanceKlass*>* transitive_interfaces) override;
81 DEBUG_ONLY(bool is_objArray_klass_slow() const override { return true; })
82 size_t oop_size(oop obj) const override;
83
84 // Allocation
85 static ObjArrayKlass* allocate_objArray_klass(ClassLoaderData* loader_data,
86 int n, Klass* element_klass, TRAPS);
87
88 oop multi_allocate(int rank, jint* sizes, TRAPS) override;
89
90 // Copying
91 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) override;
92
93 // Compute protection domain
94 oop protection_domain() const override { return bottom_klass()->protection_domain(); }
95
96 virtual void metaspace_pointers_do(MetaspaceClosure* iter) override;
97
98 private:
99 // Either oop or narrowOop depending on UseCompressedOops.
100 // must be called from within ObjArrayKlass.cpp
101 void do_copy(arrayOop s, size_t src_offset,
102 arrayOop d, size_t dst_offset,
103 int length, TRAPS);
104 public:
105 static ObjArrayKlass* cast(Klass* k) {
106 return const_cast<ObjArrayKlass*>(cast(const_cast<const Klass*>(k)));
107 }
108
109 static const ObjArrayKlass* cast(const Klass* k) {
110 assert(k->is_objArray_klass(), "cast to ObjArrayKlass");
111 return static_cast<const ObjArrayKlass*>(k);
112 }
113
114 // Sizing
115 static int header_size() { return sizeof(ObjArrayKlass)/wordSize; }
116 int size() const override { return ArrayKlass::static_size(header_size()); }
117
118 // Initialization (virtual from Klass)
119 void initialize(TRAPS) override;
120
121 // Oop fields (and metadata) iterators
122 //
123 // The ObjArrayKlass iterators also visits the Object's klass.
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_OOPS_OBJARRAYKLASS_HPP
26 #define SHARE_OOPS_OBJARRAYKLASS_HPP
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 oopFactory;
38 friend class VMStructs;
39 friend class ciInlineKlass;
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 ObjArrayKlass* _next_refined_array_klass;
50
51 static ArrayDescription array_layout_selection(Klass* element, ArrayProperties properties);
52 ObjArrayKlass* allocate_klass_from_description(ArrayDescription ad, TRAPS);
53 ObjArrayKlass* klass_from_description(ArrayDescription adesc, TRAPS);
54
55 inline ObjArrayKlass* next_refined_array_klass_acquire() const;
56 inline void release_set_next_refined_klass(ObjArrayKlass* ak);
57
58 protected:
59 // Constructor
60 ObjArrayKlass(int n, Klass* element_klass, Symbol* name, KlassKind kind, ArrayProperties props);
61 static ObjArrayKlass* allocate_klass(ClassLoaderData* loader_data, int n, Klass* k, Symbol* name, ArrayProperties props, TRAPS);
62
63 ObjArrayKlass* allocate_klass_with_properties(ArrayProperties props, TRAPS);
64 objArrayOop allocate_instance(int length, ArrayProperties props, TRAPS);
65
66 protected:
67 // Create array_name for element klass
68 static Symbol* create_element_klass_array_name(JavaThread* current, Klass* element_klass);
69
70 public:
71 // For dummy objects
72 ObjArrayKlass() {}
73
74 Klass* element_klass() const { return _element_klass; }
75
76 ObjArrayKlass* klass_with_properties(ArrayProperties props, TRAPS);
77
78 ObjArrayKlass* next_refined_array_klass() const { return _next_refined_array_klass; }
79 bool find_refined_array_klass(ObjArrayKlass* k);
80
81 // Compiler/Interpreter offset
82 static ByteSize element_klass_offset() { return byte_offset_of(ObjArrayKlass, _element_klass); }
83 static ByteSize next_refined_array_klass_offset() { return byte_offset_of(ObjArrayKlass, _next_refined_array_klass); }
84
85 Klass* bottom_klass() const { return _bottom_klass; }
86 Klass** bottom_klass_addr() { return &_bottom_klass; }
87
88 ModuleEntry* module() const override;
89 PackageEntry* package() const override;
90
91 // Dispatched operation
92 bool can_be_primary_super_slow() const override;
93 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots,
94 Array<InstanceKlass*>* transitive_interfaces) override;
95 DEBUG_ONLY(bool is_objArray_klass_slow() const override { return true; })
96 size_t oop_size(oop obj) const override;
97
98 // Allocation
99 static ObjArrayKlass* allocate_objArray_klass(ClassLoaderData* loader_data,
100 int n, Klass* element_klass, TRAPS);
101
102 oop multi_allocate(int rank, jint* sizes, TRAPS) override;
103
104 // Copying
105 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) override;
106
107 // Compute protection domain
108 oop protection_domain() const override { return bottom_klass()->protection_domain(); }
109
110 void metaspace_pointers_do(MetaspaceClosure* iter) override;
111
112 #if INCLUDE_CDS
113 void remove_unshareable_info() override;
114 void remove_java_mirror() override;
115 void restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain, TRAPS);
116 #endif
117
118 public:
119 static ObjArrayKlass* cast(Klass* k) {
120 return const_cast<ObjArrayKlass*>(cast(const_cast<const Klass*>(k)));
121 }
122
123 static const ObjArrayKlass* cast(const Klass* k) {
124 assert(k->is_objArray_klass(), "cast to ObjArrayKlass");
125 return static_cast<const ObjArrayKlass*>(k);
126 }
127
128 // Sizing
129 static int header_size() { return sizeof(ObjArrayKlass)/wordSize; }
130 int size() const override { return ArrayKlass::static_size(header_size()); }
131
132 // Initialization (virtual from Klass)
133 void initialize(TRAPS) override;
134
135 // Oop fields (and metadata) iterators
136 //
137 // The ObjArrayKlass iterators also visits the Object's klass.
|