37
38 class InstanceKlassFlags {
39 friend class VMStructs;
40 friend class JVMCIVMStructs;
41
42 #define IK_FLAGS_DO(flag) \
43 flag(rewritten , 1 << 0) /* methods rewritten. */ \
44 flag(has_nonstatic_fields , 1 << 1) /* for sizing with UseCompressedOops */ \
45 flag(should_verify_class , 1 << 2) /* allow caching of preverification */ \
46 flag(is_contended , 1 << 3) /* marked with contended annotation */ \
47 flag(has_nonstatic_concrete_methods , 1 << 4) /* class/superclass/implemented interfaces has non-static, concrete methods */ \
48 flag(declares_nonstatic_concrete_methods, 1 << 5) /* directly declares non-static, concrete methods */ \
49 flag(shared_loading_failed , 1 << 6) /* class has been loaded from shared archive */ \
50 flag(defined_by_boot_loader , 1 << 7) /* defining class loader is boot class loader */ \
51 flag(defined_by_platform_loader , 1 << 8) /* defining class loader is platform class loader */ \
52 flag(defined_by_app_loader , 1 << 9) /* defining class loader is app class loader */ \
53 flag(has_contended_annotations , 1 << 10) /* has @Contended annotation */ \
54 flag(has_localvariable_table , 1 << 11) /* has localvariable information */ \
55 flag(has_miranda_methods , 1 << 12) /* True if this class has miranda methods in it's vtable */ \
56 flag(has_final_method , 1 << 13) /* True if klass has final method */ \
57 /* end of list */
58
59 #define IK_FLAGS_ENUM_NAME(name, value) _misc_##name = value,
60 enum {
61 IK_FLAGS_DO(IK_FLAGS_ENUM_NAME)
62 };
63 #undef IK_FLAGS_ENUM_NAME
64
65 #define IK_STATUS_DO(status) \
66 status(is_being_redefined , 1 << 0) /* True if the klass is being redefined */ \
67 status(has_resolved_methods , 1 << 1) /* True if the klass has resolved MethodHandle methods */ \
68 status(has_been_redefined , 1 << 2) /* class has been redefined */ \
69 status(is_scratch_class , 1 << 3) /* class is the redefined scratch class */ \
70 status(is_marked_dependent , 1 << 4) /* class is the redefined scratch class */ \
71 status(has_init_deps_processed , 1 << 5) /* all init dependencies are processed */ \
72 /* end of list */
73
74 #define IK_STATUS_ENUM_NAME(name, value) _misc_##name = value,
75 enum {
76 IK_STATUS_DO(IK_STATUS_ENUM_NAME)
77 };
78 #undef IK_STATUS_ENUM_NAME
79
80 u2 builtin_loader_type_bits() const {
81 return _misc_defined_by_boot_loader|_misc_defined_by_platform_loader|_misc_defined_by_app_loader;
82 }
83
84 // These flags are write-once before the class is published and then read-only so don't require atomic updates.
85 u2 _flags;
86
87 // These flags are written during execution so require atomic stores
88 u1 _status;
89
90 public:
91
92 InstanceKlassFlags() : _flags(0), _status(0) {}
93
94 // Create getters and setters for the flag values.
95 #define IK_FLAGS_GET_SET(name, ignore) \
96 bool name() const { return (_flags & _misc_##name) != 0; } \
97 void set_##name(bool b) { \
98 assert_is_safe(name()); \
99 if (b) _flags |= _misc_##name; \
100 }
101 IK_FLAGS_DO(IK_FLAGS_GET_SET)
102 #undef IK_FLAGS_GET_SET
103
104 bool defined_by_other_loaders() const {
105 return (_flags & builtin_loader_type_bits()) == 0;
106 }
107
108 void set_class_loader_type(const ClassLoaderData* cld);
109
110 void assert_is_safe(bool set) NOT_DEBUG_RETURN;
111
112 // Create getters and setters for the status values.
113 #define IK_STATUS_GET_SET(name, ignore) \
114 bool name() const { return (_status & _misc_##name) != 0; } \
115 void set_##name(bool b) { \
116 if (b) { \
117 atomic_set_bits(_misc_##name); \
118 } else { \
119 atomic_clear_bits(_misc_##name); \
120 } \
121 }
122 IK_STATUS_DO(IK_STATUS_GET_SET)
123 #undef IK_STATUS_GET_SET
124
125 void atomic_set_bits(u1 bits) { Atomic::fetch_then_or(&_status, bits); }
126 void atomic_clear_bits(u1 bits) { Atomic::fetch_then_and(&_status, (u1)(~bits)); }
127 void print_on(outputStream* st) const;
128 };
129
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37
38 class InstanceKlassFlags {
39 friend class VMStructs;
40 friend class JVMCIVMStructs;
41
42 #define IK_FLAGS_DO(flag) \
43 flag(rewritten , 1 << 0) /* methods rewritten. */ \
44 flag(has_nonstatic_fields , 1 << 1) /* for sizing with UseCompressedOops */ \
45 flag(should_verify_class , 1 << 2) /* allow caching of preverification */ \
46 flag(is_contended , 1 << 3) /* marked with contended annotation */ \
47 flag(has_nonstatic_concrete_methods , 1 << 4) /* class/superclass/implemented interfaces has non-static, concrete methods */ \
48 flag(declares_nonstatic_concrete_methods, 1 << 5) /* directly declares non-static, concrete methods */ \
49 flag(shared_loading_failed , 1 << 6) /* class has been loaded from shared archive */ \
50 flag(defined_by_boot_loader , 1 << 7) /* defining class loader is boot class loader */ \
51 flag(defined_by_platform_loader , 1 << 8) /* defining class loader is platform class loader */ \
52 flag(defined_by_app_loader , 1 << 9) /* defining class loader is app class loader */ \
53 flag(has_contended_annotations , 1 << 10) /* has @Contended annotation */ \
54 flag(has_localvariable_table , 1 << 11) /* has localvariable information */ \
55 flag(has_miranda_methods , 1 << 12) /* True if this class has miranda methods in it's vtable */ \
56 flag(has_final_method , 1 << 13) /* True if klass has final method */ \
57 flag(has_inline_type_fields , 1 << 14) /* has inline fields and related embedded section is not empty */ \
58 flag(is_empty_inline_type , 1 << 15) /* empty inline type (*) */ \
59 flag(is_naturally_atomic , 1 << 16) /* loaded/stored in one instruction*/ \
60 flag(must_be_atomic , 1 << 17) /* doesn't allow tearing */ \
61 flag(has_loosely_consistent_annotation , 1 << 18) /* the class has the LooselyConsistentValue annotation WARNING: it doesn't automatically mean that the class allows tearing */ \
62 flag(has_strict_static_fields , 1 << 19) /* True if strict static fields declared */ \
63 /* end of list */
64
65 /* (*) An inline type is considered empty if it contains no non-static fields or
66 if it contains only empty inline fields. Note that JITs have a slightly different
67 definition: empty inline fields must be flat otherwise the container won't
68 be considered empty */
69
70 #define IK_FLAGS_ENUM_NAME(name, value) _misc_##name = value,
71 enum {
72 IK_FLAGS_DO(IK_FLAGS_ENUM_NAME)
73 };
74 #undef IK_FLAGS_ENUM_NAME
75
76 #define IK_STATUS_DO(status) \
77 status(is_being_redefined , 1 << 0) /* True if the klass is being redefined */ \
78 status(has_resolved_methods , 1 << 1) /* True if the klass has resolved MethodHandle methods */ \
79 status(has_been_redefined , 1 << 2) /* class has been redefined */ \
80 status(is_scratch_class , 1 << 3) /* class is the redefined scratch class */ \
81 status(is_marked_dependent , 1 << 4) /* class is the redefined scratch class */ \
82 status(has_init_deps_processed , 1 << 5) /* all init dependencies are processed */ \
83 /* end of list */
84
85 #define IK_STATUS_ENUM_NAME(name, value) _misc_##name = value,
86 enum {
87 IK_STATUS_DO(IK_STATUS_ENUM_NAME)
88 };
89 #undef IK_STATUS_ENUM_NAME
90
91 u2 builtin_loader_type_bits() const {
92 return _misc_defined_by_boot_loader|_misc_defined_by_platform_loader|_misc_defined_by_app_loader;
93 }
94
95 // These flags are write-once before the class is published and then read-only so don't require atomic updates.
96 u4 _flags;
97
98 // These flags are written during execution so require atomic stores
99 u1 _status;
100
101 public:
102
103 InstanceKlassFlags() : _flags(0), _status(0) {}
104
105 // Create getters and setters for the flag values.
106 #define IK_FLAGS_GET_SET(name, ignore) \
107 bool name() const { return (_flags & _misc_##name) != 0; } \
108 void set_##name(bool b) { \
109 assert_is_safe(name()); \
110 if (b) _flags |= _misc_##name; \
111 }
112 IK_FLAGS_DO(IK_FLAGS_GET_SET)
113 #undef IK_FLAGS_GET_SET
114
115 bool defined_by_other_loaders() const {
116 return (_flags & builtin_loader_type_bits()) == 0;
117 }
118
119 void set_class_loader_type(const ClassLoaderData* cld);
120
121
122 u4 flags() const { return _flags; }
123
124 static u4 is_empty_inline_type_value() {
125 return _misc_is_empty_inline_type;
126 }
127
128 void assert_is_safe(bool set) NOT_DEBUG_RETURN;
129
130 // Create getters and setters for the status values.
131 #define IK_STATUS_GET_SET(name, ignore) \
132 bool name() const { return (_status & _misc_##name) != 0; } \
133 void set_##name(bool b) { \
134 if (b) { \
135 atomic_set_bits(_misc_##name); \
136 } else { \
137 atomic_clear_bits(_misc_##name); \
138 } \
139 }
140 IK_STATUS_DO(IK_STATUS_GET_SET)
141 #undef IK_STATUS_GET_SET
142
143 void atomic_set_bits(u1 bits) { Atomic::fetch_then_or(&_status, bits); }
144 void atomic_clear_bits(u1 bits) { Atomic::fetch_then_and(&_status, (u1)(~bits)); }
145 void print_on(outputStream* st) const;
146 };
147
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