jdk8-mips64-public/hotspot: src/share/vm/ci/ciKlass.hpp@710a3c8b516e

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    25 #ifndef SHARE_VM_CI_CIKLASS_HPP

    26 #define SHARE_VM_CI_CIKLASS_HPP

    28 #include "ci/ciType.hpp"

    30 // ciKlass

    31 //

    32 // This class and its subclasses represent Klass*s in the

    33 // HotSpot virtual machine.  In the vm, each Klass* contains an

    34 // embedded Klass object.  ciKlass is subclassed to explicitly

    35 // represent the kind of Klass embedded in the Klass*.  For

    36 // example, a Klass* with an embedded ObjArrayKlass object is

    37 // represented in the ciObject hierarchy by the class

    38 // ciObjArrayKlass.

    39 class ciKlass : public ciType {

    40   CI_PACKAGE_ACCESS

    41   friend class ciEnv;

    42   friend class ciField;

    43   friend class ciMethod;

    44   friend class ciMethodData;

    45   friend class ciObjArrayKlass;

    47 private:

    48   ciSymbol* _name;

    49   jint _layout_helper;

    51 protected:

    52   ciKlass(KlassHandle k_h, ciSymbol* name);

    53   ciKlass(ciSymbol* name, BasicType bt);

    55   Klass* get_Klass() const {

    56     Klass* k = (Klass*)_metadata;

    57     assert(k != NULL, "illegal use of unloaded klass");

    58     return k;

    59   }

    61   // Certain subklasses have an associated class loader.

    62   virtual oop loader()             { return NULL; }

    63   virtual jobject loader_handle()  { return NULL; }

    65   virtual oop protection_domain()             { return NULL; }

    66   virtual jobject protection_domain_handle()  { return NULL; }

    68   const char* type_string() { return "ciKlass"; }

    70   void print_impl(outputStream* st);

    72 public:

    73   ciKlass(KlassHandle k_h);

    75   // What is the name of this klass?

    76   ciSymbol* name() const { return _name; }

    78   // What is its layout helper value?

    79   jint layout_helper() { return _layout_helper; }

    81   bool is_subtype_of(ciKlass* klass);

    82   bool is_subclass_of(ciKlass* klass);

    83   juint super_depth();

    84   juint super_check_offset();

    85   ciKlass* super_of_depth(juint i);

    86   bool can_be_primary_super();

    87   static juint primary_super_limit() { return Klass::primary_super_limit(); }

    89   // Is this ciObject the ciInstanceKlass representing java.lang.Object()?

    90   virtual bool is_java_lang_Object() const  { return false; }

    92   // Get the shared parent of two klasses.

    93   ciKlass* least_common_ancestor(ciKlass* k);

    95   virtual bool is_interface() {

    96     return false;

    97   }

    99   virtual bool is_abstract() {

   100     return false;

   101   }

   103   // Does this type (array, class, interface) have no subtypes?

   104   virtual bool is_leaf_type() {

   105     return false;

   106   }

   108   // Attempt to get a klass using this ciKlass's loader.

   109   ciKlass* find_klass(ciSymbol* klass_name);

   110   // Note:  To find a class from its name string, use ciSymbol::make,

   111   // but consider adding to vmSymbols.hpp instead.

   113   // Get the instance of java.lang.Class corresponding to this klass.

   114   ciInstance*            java_mirror();

   116   // Fetch Klass::modifier_flags.

   117   jint                   modifier_flags();

   119   // Fetch Klass::access_flags.

   120   jint                   access_flags();

   122   // What kind of ciObject is this?

   123   bool is_klass() const { return true; }

   125   virtual ciKlass* exact_klass() = 0;

   127   void print_name_on(outputStream* st);

   128 };

   130 #endif // SHARE_VM_CI_CIKLASS_HPP

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