218 u2 _static_oop_field_count; // number of static oop fields in this klass
219 u2 _java_fields_count; // The number of declared Java fields
220
221 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change
222
223 // _is_marked_dependent can be set concurrently, thus cannot be part of the
224 // _misc_flags.
225 bool _is_marked_dependent; // used for marking during flushing and deoptimization
226
227 // Class states are defined as ClassState (see above).
228 // Place the _init_state here to utilize the unused 2-byte after
229 // _idnum_allocated_count.
230 u1 _init_state; // state of class
231
232 // This can be used to quickly discriminate among the four kinds of
233 // InstanceKlass. This should be an enum (?)
234 static const unsigned _kind_other = 0; // concrete InstanceKlass
235 static const unsigned _kind_reference = 1; // InstanceRefKlass
236 static const unsigned _kind_class_loader = 2; // InstanceClassLoaderKlass
237 static const unsigned _kind_mirror = 3; // InstanceMirrorKlass
238
239 u1 _reference_type; // reference type
240 u1 _kind; // kind of InstanceKlass
241
242 enum {
243 _misc_rewritten = 1 << 0, // methods rewritten.
244 _misc_has_nonstatic_fields = 1 << 1, // for sizing with UseCompressedOops
245 _misc_should_verify_class = 1 << 2, // allow caching of preverification
246 _misc_unused = 1 << 3, // not currently used
247 _misc_is_contended = 1 << 4, // marked with contended annotation
248 _misc_has_nonstatic_concrete_methods = 1 << 5, // class/superclass/implemented interfaces has non-static, concrete methods
249 _misc_declares_nonstatic_concrete_methods = 1 << 6, // directly declares non-static, concrete methods
250 _misc_has_been_redefined = 1 << 7, // class has been redefined
251 _misc_shared_loading_failed = 1 << 8, // class has been loaded from shared archive
252 _misc_is_scratch_class = 1 << 9, // class is the redefined scratch class
253 _misc_is_shared_boot_class = 1 << 10, // defining class loader is boot class loader
254 _misc_is_shared_platform_class = 1 << 11, // defining class loader is platform class loader
255 _misc_is_shared_app_class = 1 << 12, // defining class loader is app class loader
256 _misc_has_resolved_methods = 1 << 13, // resolved methods table entries added for this class
257 _misc_is_being_redefined = 1 << 14, // used for locking redefinition
771 }
772
773 bool is_scratch_class() const {
774 return (_misc_flags & _misc_is_scratch_class) != 0;
775 }
776
777 void set_is_scratch_class() {
778 _misc_flags |= _misc_is_scratch_class;
779 }
780
781 bool has_resolved_methods() const {
782 return (_misc_flags & _misc_has_resolved_methods) != 0;
783 }
784
785 void set_has_resolved_methods() {
786 _misc_flags |= _misc_has_resolved_methods;
787 }
788 private:
789
790 void set_kind(unsigned kind) {
791 _kind = (u1)kind;
792 }
793
794 bool is_kind(unsigned desired) const {
795 return _kind == (u1)desired;
796 }
797
798 public:
799
800 // Other is anything that is not one of the more specialized kinds of InstanceKlass.
801 bool is_other_instance_klass() const { return is_kind(_kind_other); }
802 bool is_reference_instance_klass() const { return is_kind(_kind_reference); }
803 bool is_mirror_instance_klass() const { return is_kind(_kind_mirror); }
804 bool is_class_loader_instance_klass() const { return is_kind(_kind_class_loader); }
805
806 #if INCLUDE_JVMTI
807
808 void init_previous_versions() {
809 _previous_versions = NULL;
810 }
811
812 private:
813 static bool _has_previous_versions;
814 public:
815 static void purge_previous_versions(InstanceKlass* ik) {
816 if (ik->has_been_redefined()) {
817 ik->purge_previous_version_list();
818 }
819 }
820
821 static bool has_previous_versions_and_reset();
822 static bool has_previous_versions() { return _has_previous_versions; }
823
824 // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation
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218 u2 _static_oop_field_count; // number of static oop fields in this klass
219 u2 _java_fields_count; // The number of declared Java fields
220
221 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change
222
223 // _is_marked_dependent can be set concurrently, thus cannot be part of the
224 // _misc_flags.
225 bool _is_marked_dependent; // used for marking during flushing and deoptimization
226
227 // Class states are defined as ClassState (see above).
228 // Place the _init_state here to utilize the unused 2-byte after
229 // _idnum_allocated_count.
230 u1 _init_state; // state of class
231
232 // This can be used to quickly discriminate among the four kinds of
233 // InstanceKlass. This should be an enum (?)
234 static const unsigned _kind_other = 0; // concrete InstanceKlass
235 static const unsigned _kind_reference = 1; // InstanceRefKlass
236 static const unsigned _kind_class_loader = 2; // InstanceClassLoaderKlass
237 static const unsigned _kind_mirror = 3; // InstanceMirrorKlass
238 static const unsigned _misc_kind_stack_chunk = 4; // InstanceStackChunk
239 static const unsigned _misc_kind_last = _misc_kind_stack_chunk;
240
241 u1 _reference_type; // reference type
242 u1 _kind; // kind of InstanceKlass
243
244 enum {
245 _misc_rewritten = 1 << 0, // methods rewritten.
246 _misc_has_nonstatic_fields = 1 << 1, // for sizing with UseCompressedOops
247 _misc_should_verify_class = 1 << 2, // allow caching of preverification
248 _misc_unused = 1 << 3, // not currently used
249 _misc_is_contended = 1 << 4, // marked with contended annotation
250 _misc_has_nonstatic_concrete_methods = 1 << 5, // class/superclass/implemented interfaces has non-static, concrete methods
251 _misc_declares_nonstatic_concrete_methods = 1 << 6, // directly declares non-static, concrete methods
252 _misc_has_been_redefined = 1 << 7, // class has been redefined
253 _misc_shared_loading_failed = 1 << 8, // class has been loaded from shared archive
254 _misc_is_scratch_class = 1 << 9, // class is the redefined scratch class
255 _misc_is_shared_boot_class = 1 << 10, // defining class loader is boot class loader
256 _misc_is_shared_platform_class = 1 << 11, // defining class loader is platform class loader
257 _misc_is_shared_app_class = 1 << 12, // defining class loader is app class loader
258 _misc_has_resolved_methods = 1 << 13, // resolved methods table entries added for this class
259 _misc_is_being_redefined = 1 << 14, // used for locking redefinition
773 }
774
775 bool is_scratch_class() const {
776 return (_misc_flags & _misc_is_scratch_class) != 0;
777 }
778
779 void set_is_scratch_class() {
780 _misc_flags |= _misc_is_scratch_class;
781 }
782
783 bool has_resolved_methods() const {
784 return (_misc_flags & _misc_has_resolved_methods) != 0;
785 }
786
787 void set_has_resolved_methods() {
788 _misc_flags |= _misc_has_resolved_methods;
789 }
790 private:
791
792 void set_kind(unsigned kind) {
793 assert(kind <= _misc_kind_last, "Invalid InstanceKlass kind");
794 _kind = (u1)kind;
795 }
796
797 bool is_kind(unsigned desired) const {
798 return _kind == (u1)desired;
799 }
800
801 public:
802
803 // Other is anything that is not one of the more specialized kinds of InstanceKlass.
804 bool is_other_instance_klass() const { return is_kind(_kind_other); }
805 bool is_reference_instance_klass() const { return is_kind(_kind_reference); }
806 bool is_mirror_instance_klass() const { return is_kind(_kind_mirror); }
807 bool is_class_loader_instance_klass() const { return is_kind(_kind_class_loader); }
808 bool is_stack_chunk_instance_klass() const { return is_kind(_misc_kind_stack_chunk); }
809
810 #if INCLUDE_JVMTI
811
812 void init_previous_versions() {
813 _previous_versions = NULL;
814 }
815
816 private:
817 static bool _has_previous_versions;
818 public:
819 static void purge_previous_versions(InstanceKlass* ik) {
820 if (ik->has_been_redefined()) {
821 ik->purge_previous_version_list();
822 }
823 }
824
825 static bool has_previous_versions_and_reset();
826 static bool has_previous_versions() { return _has_previous_versions; }
827
828 // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation
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