33 #include "oops/instanceMirrorKlass.hpp"
34 #include "oops/instanceOop.hpp"
35 #include "oops/oop.inline.hpp"
36 #include "oops/symbol.hpp"
37 #include "runtime/handles.inline.hpp"
38 #include "utilities/macros.hpp"
39
40 int InstanceMirrorKlass::_offset_of_static_fields = 0;
41
42 InstanceMirrorKlass::InstanceMirrorKlass() {
43 assert(CDSConfig::is_dumping_static_archive() || CDSConfig::is_using_archive(), "only for CDS");
44 }
45
46 size_t InstanceMirrorKlass::instance_size(Klass* k) {
47 if (k != nullptr && k->is_instance_klass()) {
48 return align_object_size(size_helper() + InstanceKlass::cast(k)->static_field_size());
49 }
50 return size_helper();
51 }
52
53 instanceOop InstanceMirrorKlass::allocate_instance(Klass* k, TRAPS) {
54 // Query before forming handle.
55 size_t size = instance_size(k);
56 assert(size > 0, "total object size must be non-zero: %zu", size);
57
58 // Since mirrors can be variable sized because of the static fields, store
59 // the size in the mirror itself.
60 return (instanceOop)Universe::heap()->class_allocate(this, size, THREAD);
61 }
62
63 size_t InstanceMirrorKlass::oop_size(oop obj) const {
64 return java_lang_Class::oop_size(obj);
65 }
66
67 int InstanceMirrorKlass::compute_static_oop_field_count(oop obj) {
68 Klass* k = java_lang_Class::as_Klass(obj);
69 if (k != nullptr && k->is_instance_klass()) {
70 return InstanceKlass::cast(k)->static_oop_field_count();
71 }
72 return 0;
73 }
74
75 #if INCLUDE_CDS
76 void InstanceMirrorKlass::serialize_offsets(SerializeClosure* f) {
77 f->do_int(&_offset_of_static_fields);
78 }
79 #endif
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33 #include "oops/instanceMirrorKlass.hpp"
34 #include "oops/instanceOop.hpp"
35 #include "oops/oop.inline.hpp"
36 #include "oops/symbol.hpp"
37 #include "runtime/handles.inline.hpp"
38 #include "utilities/macros.hpp"
39
40 int InstanceMirrorKlass::_offset_of_static_fields = 0;
41
42 InstanceMirrorKlass::InstanceMirrorKlass() {
43 assert(CDSConfig::is_dumping_static_archive() || CDSConfig::is_using_archive(), "only for CDS");
44 }
45
46 size_t InstanceMirrorKlass::instance_size(Klass* k) {
47 if (k != nullptr && k->is_instance_klass()) {
48 return align_object_size(size_helper() + InstanceKlass::cast(k)->static_field_size());
49 }
50 return size_helper();
51 }
52
53 instanceOop InstanceMirrorKlass::allocate_instance(Klass* k, bool extend, TRAPS) {
54 // Query before forming handle.
55 size_t base_size = instance_size(k);
56 size_t size = base_size;
57 if (extend && UseCompactObjectHeaders) {
58 size = align_object_size(size + 1);
59 }
60 assert(base_size > 0, "base object size must be non-zero: %zu", base_size);
61
62 // Since mirrors can be variable sized because of the static fields, store
63 // the size in the mirror itself.
64 instanceOop obj = (instanceOop)Universe::heap()->class_allocate(this, size, base_size, THREAD);
65 if (extend && UseCompactObjectHeaders) {
66 obj->set_mark(obj->mark().set_not_hashed_expanded());
67 }
68 return obj;
69 }
70
71 size_t InstanceMirrorKlass::oop_size(oop obj, markWord mark) const {
72 return java_lang_Class::oop_size(obj);
73 }
74
75 int InstanceMirrorKlass::compute_static_oop_field_count(oop obj) {
76 Klass* k = java_lang_Class::as_Klass(obj);
77 if (k != nullptr && k->is_instance_klass()) {
78 return InstanceKlass::cast(k)->static_oop_field_count();
79 }
80 return 0;
81 }
82
83 int InstanceMirrorKlass::hash_offset_in_bytes(oop obj, markWord m) const {
84 assert(UseCompactObjectHeaders, "only with compact i-hash");
85 // TODO: There may be gaps that we could use, e.g. in the fields of Class,
86 // between the fields of Class and the static fields or in or at the end of
87 // the static fields block.
88 // When implementing any change here, make sure that allocate_instance()
89 // and corresponding code in InstanceMirrorKlass.java are in sync.
90 return checked_cast<int>(obj->base_size_given_klass(m, this) * BytesPerWord);
91 }
92
93 #if INCLUDE_CDS
94 void InstanceMirrorKlass::serialize_offsets(SerializeClosure* f) {
95 f->do_int(&_offset_of_static_fields);
96 }
97 #endif
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