SSL instanceKlassMiscStatus.hpp Sprache: C

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#ifndef SHARE_OOPS_INSTANCEKLASSMISCSTATUS_HPP
#define SHARE_OOPS_INSTANCEKLASSMISCSTATUS_HPP

class ClassLoaderData;

class InstanceKlassMiscStatus {
  friend class VMStructs;
  friend class JVMCIVMStructs;

#define IK_FLAGS_DO(flag)  \
    flag(rewritten                          , 1 << 0) /* methods rewritten. */ \
    flag(has_nonstatic_fields               , 1 << 1) /* for sizing with UseCompressedOops */ \
    flag(should_verify_class                , 1 << 2) /* allow caching of preverification */ \
    flag(unused                             , 1 << 3) /* not currently used */ \
    flag(is_contended                       , 1 << 4) /* marked with contended annotation */ \
    flag(has_nonstatic_concrete_methods     , 1 << 5) /* class/superclass/implemented interfaces has non-static, concrete methods */ \
    flag(declares_nonstatic_concrete_methods, 1 << 6) /* directly declares non-static, concrete methods */ \
    flag(has_been_redefined                 , 1 << 7) /* class has been redefined */ \
    flag(shared_loading_failed              , 1 << 8) /* class has been loaded from shared archive */ \
    flag(is_scratch_class                   , 1 << 9) /* class is the redefined scratch class */ \
    flag(is_shared_boot_class               , 1 << 10) /* defining class loader is boot class loader */ \
    flag(is_shared_platform_class           , 1 << 11) /* defining class loader is platform class loader */ \
    flag(is_shared_app_class                , 1 << 12) /* defining class loader is app class loader */ \
    flag(has_contended_annotations          , 1 << 13) /* has @Contended annotation */

#define IK_FLAGS_ENUM_NAME(name, value)    _misc_##name = value,
  enum {
    IK_FLAGS_DO(IK_FLAGS_ENUM_NAME)
  };
#undef IK_FLAGS_ENUM_NAME

  u2 shared_loader_type_bits() const {
    return _misc_is_shared_boot_class|_misc_is_shared_platform_class|_misc_is_shared_app_class;
  }

  // These flags are write-once before the class is published and then read-only so don't require atomic updates.
  u2 _flags;

public:

  InstanceKlassMiscStatus() : _flags(0) {}

  // Create getters and setters for the flag values.
#define IK_FLAGS_GET(name, ignore)          \
  bool name() const { return (_flags & _misc_##name) != 0; }
  IK_FLAGS_DO(IK_FLAGS_GET)
#undef IK_FLAGS_GET

#define IK_FLAGS_SET(name, ignore)   \
  void set_##name(bool b) {         \
    assert(!name(), "set once");    \
    if (b) _flags |= _misc_##name; \
  }
  IK_FLAGS_DO(IK_FLAGS_SET)
#undef IK_FLAGS_SET

  bool is_shared_unregistered_class() const {
    return (_flags & shared_loader_type_bits()) == 0;
  }

  void set_shared_class_loader_type(s2 loader_type);

  void assign_class_loader_type(const ClassLoaderData* cld);
};

#endif // SHARE_OOPS_INSTANCEKLASSMISCSTATUS_HPP

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