hotspot Udiff src/share/vm/oops/instanceKlass.hpp (original) (raw)

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rev 9016 : [mq]: ikflags

@@ -115,10 +115,11 @@ // Constructor InstanceKlass(int vtable_len, int itable_len, int static_field_size, int nonstatic_oop_map_size,

•            unsigned kind,
             ReferenceType rt,
             AccessFlags access_flags,
             bool is_anonymous);

  public: static InstanceKlass* allocate_instance_klass(

@@ -197,20 +198,34 @@ // _is_marked_dependent can be set concurrently, thus cannot be part of the // _misc_flags. bool _is_marked_dependent; // used for marking during flushing and deoptimization bool _has_unloaded_dependent;

• // The low two bits of _misc_flags contains the kind field.
• // This can be used to quickly discriminate among the four kinds of
• // InstanceKlass.
• static const unsigned _misc_kind_field_size = 2;
• static const unsigned _misc_kind_field_pos = 0;
• static const unsigned _misc_kind_field_mask = 3;
• static const unsigned _misc_kind_instance = 0; // concrete InstanceKlass
• static const unsigned _misc_kind_reference = 1; // InstanceRefKlass
• static const unsigned _misc_kind_class_loader = 2; // InstanceClassLoaderKlass
• static const unsigned _misc_kind_mirror = 3; // InstanceMirrorKlass
• // Start after _misc_kind field. enum {

• _misc_rewritten = 1 << 0, // methods rewritten.
• _misc_has_nonstatic_fields = 1 << 1, // for sizing with UseCompressedOops
• _misc_should_verify_class = 1 << 2, // allow caching of preverification
• _misc_is_anonymous = 1 << 3, // has embedded _host_klass field
• _misc_is_contended = 1 << 4, // marked with contended annotation
• _misc_has_default_methods = 1 << 5, // class/superclass/implemented interfaces has default methods
• _misc_declares_default_methods = 1 << 6, // directly declares default methods (any access)
• _misc_has_been_redefined = 1 << 7, // class has been redefined
• _misc_is_scratch_class = 1 << 8 // class is the redefined scratch class

• _misc_rewritten = 1 << 2, // methods rewritten.
• _misc_has_nonstatic_fields = 1 << 3, // for sizing with UseCompressedOops
• _misc_should_verify_class = 1 << 4, // allow caching of preverification
• _misc_is_anonymous = 1 << 5, // has embedded _host_klass field
• _misc_is_contended = 1 << 6, // marked with contended annotation
• _misc_has_default_methods = 1 << 7, // class/superclass/implemented interfaces has default methods
• _misc_declares_default_methods = 1 << 8, // directly declares default methods (any access)
• _misc_has_been_redefined = 1 << 9, // class has been redefined
• _misc_is_scratch_class = 1 << 10 // class is the redefined scratch class

}; u2 _misc_flags; u2 _minor_version; // minor version number of class file u2 _major_version; // major version number of class file Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization)

@@ -665,10 +680,66 @@

void set_is_scratch_class() { _misc_flags |= _misc_is_scratch_class; }

+private: +

• static void check_kind(unsigned kind) {

• assert(kind <= _misc_kind_field_mask, "Invalid InstanceKlass kind");

• }

• void set_kind(unsigned kind) {

• check_kind(kind);

• unsigned fmask = ~(_misc_kind_field_mask << _misc_kind_field_pos);

• unsigned flags = _misc_flags & fmask;

• _misc_flags = (flags | (kind << _misc_kind_field_pos));

• }

• static bool kind_is_match(unsigned kind, unsigned desired) {

• check_kind(kind);

• return kind == desired;

• }

• +public:

• unsigned kind() const {

• return (_misc_flags >> _misc_kind_field_pos) & _misc_kind_field_mask;

• }

• static bool kind_is_instance(unsigned kind) {

• return kind_is_match(kind, _misc_kind_instance);

• }

• static bool kind_is_reference(unsigned kind) {

• return kind_is_match(kind, _misc_kind_reference);

• }

• static bool kind_is_mirror(unsigned kind) {

• return kind_is_match(kind, _misc_kind_mirror);

• }

• static bool kind_is_class_loader(unsigned kind) {

• return kind_is_match(kind, _misc_kind_class_loader);

• }

• bool kind_is_instance() const {

• return kind_is_instance(kind());

• }

• bool kind_is_reference() const {

• return kind_is_reference(kind());

• }

• bool kind_is_mirror() const {

• return kind_is_mirror(kind());

• }

• bool kind_is_class_loader() const {

• return kind_is_class_loader(kind());

• }

• void init_previous_versions() { _previous_versions = NULL; }

  private:

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