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src/hotspot/share/interpreter/linkResolver.hpp

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rev 58631 : imported patch link_selected_klass


  32 
  33 // CallInfo provides all the information gathered for a particular
  34 // linked call site after resolving it. A link is any reference
  35 // made from within the bytecodes of a method to an object outside of
  36 // that method. If the info is invalid, the link has not been resolved
  37 // successfully.
  38 
  39 class CallInfo : public StackObj {
  40  public:
  41   // Ways that a method call might be selected (or not) based on receiver type.
  42   // Note that an invokevirtual instruction might be linked with no_dispatch,
  43   // and an invokeinterface instruction might be linked with any of the three options
  44   enum CallKind {
  45     direct_call,                        // jump into resolved_method (must be concrete)
  46     vtable_call,                        // select recv.klass.method_at_vtable(index)
  47     itable_call,                        // select recv.klass.method_at_itable(resolved_method.holder, index)
  48     unknown_kind = -1
  49   };
  50  private:
  51   Klass*       _resolved_klass;         // static receiver klass, resolved from a symbolic reference
  52   Klass*       _selected_klass;         // dynamic receiver class (same as static, or subklass)
  53   methodHandle _resolved_method;        // static target method
  54   methodHandle _selected_method;        // dynamic (actual) target method
  55   CallKind     _call_kind;              // kind of call (static(=bytecode static/special +
  56                                         //               others inferred), vtable, itable)
  57   int          _call_index;             // vtable or itable index of selected class method (if any)
  58   Handle       _resolved_appendix;      // extra argument in constant pool (if CPCE::has_appendix)
  59   Handle       _resolved_method_name;   // Object holding the ResolvedMethodName
  60 
  61   void set_static(Klass* resolved_klass, const methodHandle& resolved_method, TRAPS);
  62   void set_interface(Klass* resolved_klass, Klass* selected_klass,
  63                      const methodHandle& resolved_method,
  64                      const methodHandle& selected_method,
  65                      int itable_index, TRAPS);
  66   void set_virtual(Klass* resolved_klass, Klass* selected_klass,
  67                    const methodHandle& resolved_method,
  68                    const methodHandle& selected_method,
  69                    int vtable_index, TRAPS);
  70   void set_handle(const methodHandle& resolved_method,
  71                   Handle resolved_appendix, TRAPS);
  72   void set_handle(Klass* resolved_klass,
  73                   const methodHandle& resolved_method,
  74                   Handle resolved_appendix, TRAPS);
  75   void set_common(Klass* resolved_klass, Klass* selected_klass,
  76                   const methodHandle& resolved_method,
  77                   const methodHandle& selected_method,
  78                   CallKind kind,
  79                   int index, TRAPS);
  80 
  81   friend class BootstrapInfo;
  82   friend class LinkResolver;
  83 
  84  public:
  85   CallInfo() {
  86 #ifndef PRODUCT
  87     _call_kind  = CallInfo::unknown_kind;
  88     _call_index = Method::garbage_vtable_index;
  89 #endif //PRODUCT
  90   }
  91 
  92   // utility to extract an effective CallInfo from a method and an optional receiver limit
  93   // does not queue the method for compilation.  This also creates a ResolvedMethodName
  94   // object for the resolved_method.
  95   CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS);
  96 
  97   Klass*  resolved_klass() const                 { return _resolved_klass; }
  98   Klass*  selected_klass() const                 { return _selected_klass; }
  99   Method* resolved_method() const                { return _resolved_method(); }
 100   Method* selected_method() const                { return _selected_method(); }
 101   Handle       resolved_appendix() const         { return _resolved_appendix; }
 102   Handle       resolved_method_name() const      { return _resolved_method_name; }
 103   // Materialize a java.lang.invoke.ResolvedMethodName for this resolved_method
 104   void     set_resolved_method_name(TRAPS);
 105 
 106   BasicType    result_type() const               { return selected_method()->result_type(); }
 107   CallKind     call_kind() const                 { return _call_kind; }
 108   int          call_index() const                { return _call_index; }
 109   int          vtable_index() const {
 110     // Even for interface calls the vtable index could be non-negative.
 111     // See CallInfo::set_interface.
 112     assert(has_vtable_index() || is_statically_bound(), "");
 113     assert(call_kind() == vtable_call || call_kind() == direct_call, "");
 114     // The returned value is < 0 if the call is statically bound.
 115     // But, the returned value may be >= 0 even if the kind is direct_call.
 116     // It is up to the caller to decide which way to go.
 117     return _call_index;
 118   }
 119   int          itable_index() const {
 120     assert(call_kind() == itable_call, "");
 121     // The returned value is always >= 0, a valid itable index.
 122     return _call_index;
 123   }
 124 
 125   // debugging
 126 #ifdef ASSERT
 127   bool         has_vtable_index() const          { return _call_index >= 0 && _call_kind != CallInfo::itable_call; }
 128   bool         is_statically_bound() const       { return _call_index == Method::nonvirtual_vtable_index; }




  32 
  33 // CallInfo provides all the information gathered for a particular
  34 // linked call site after resolving it. A link is any reference
  35 // made from within the bytecodes of a method to an object outside of
  36 // that method. If the info is invalid, the link has not been resolved
  37 // successfully.
  38 
  39 class CallInfo : public StackObj {
  40  public:
  41   // Ways that a method call might be selected (or not) based on receiver type.
  42   // Note that an invokevirtual instruction might be linked with no_dispatch,
  43   // and an invokeinterface instruction might be linked with any of the three options
  44   enum CallKind {
  45     direct_call,                        // jump into resolved_method (must be concrete)
  46     vtable_call,                        // select recv.klass.method_at_vtable(index)
  47     itable_call,                        // select recv.klass.method_at_itable(resolved_method.holder, index)
  48     unknown_kind = -1
  49   };
  50  private:
  51   Klass*       _resolved_klass;         // static receiver klass, resolved from a symbolic reference

  52   methodHandle _resolved_method;        // static target method
  53   methodHandle _selected_method;        // dynamic (actual) target method
  54   CallKind     _call_kind;              // kind of call (static(=bytecode static/special +
  55                                         //               others inferred), vtable, itable)
  56   int          _call_index;             // vtable or itable index of selected class method (if any)
  57   Handle       _resolved_appendix;      // extra argument in constant pool (if CPCE::has_appendix)
  58   Handle       _resolved_method_name;   // Object holding the ResolvedMethodName
  59 
  60   void set_static(Klass* resolved_klass, const methodHandle& resolved_method, TRAPS);
  61   void set_interface(Klass* resolved_klass,
  62                      const methodHandle& resolved_method,
  63                      const methodHandle& selected_method,
  64                      int itable_index, TRAPS);
  65   void set_virtual(Klass* resolved_klass,
  66                    const methodHandle& resolved_method,
  67                    const methodHandle& selected_method,
  68                    int vtable_index, TRAPS);
  69   void set_handle(const methodHandle& resolved_method,
  70                   Handle resolved_appendix, TRAPS);
  71   void set_handle(Klass* resolved_klass,
  72                   const methodHandle& resolved_method,
  73                   Handle resolved_appendix, TRAPS);
  74   void set_common(Klass* resolved_klass,
  75                   const methodHandle& resolved_method,
  76                   const methodHandle& selected_method,
  77                   CallKind kind,
  78                   int index, TRAPS);
  79 
  80   friend class BootstrapInfo;
  81   friend class LinkResolver;
  82 
  83  public:
  84   CallInfo() {
  85 #ifndef PRODUCT
  86     _call_kind  = CallInfo::unknown_kind;
  87     _call_index = Method::garbage_vtable_index;
  88 #endif //PRODUCT
  89   }
  90 
  91   // utility to extract an effective CallInfo from a method and an optional receiver limit
  92   // does not queue the method for compilation.  This also creates a ResolvedMethodName
  93   // object for the resolved_method.
  94   CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS);
  95 
  96   Klass*  resolved_klass() const                 { return _resolved_klass; }

  97   Method* resolved_method() const                { return _resolved_method(); }
  98   Method* selected_method() const                { return _selected_method(); }
  99   Handle       resolved_appendix() const         { return _resolved_appendix; }
 100   Handle       resolved_method_name() const      { return _resolved_method_name; }
 101   // Materialize a java.lang.invoke.ResolvedMethodName for this resolved_method
 102   void     set_resolved_method_name(TRAPS);
 103 
 104   BasicType    result_type() const               { return selected_method()->result_type(); }
 105   CallKind     call_kind() const                 { return _call_kind; }

 106   int          vtable_index() const {
 107     // Even for interface calls the vtable index could be non-negative.
 108     // See CallInfo::set_interface.
 109     assert(has_vtable_index() || is_statically_bound(), "");
 110     assert(call_kind() == vtable_call || call_kind() == direct_call, "");
 111     // The returned value is < 0 if the call is statically bound.
 112     // But, the returned value may be >= 0 even if the kind is direct_call.
 113     // It is up to the caller to decide which way to go.
 114     return _call_index;
 115   }
 116   int          itable_index() const {
 117     assert(call_kind() == itable_call, "");
 118     // The returned value is always >= 0, a valid itable index.
 119     return _call_index;
 120   }
 121 
 122   // debugging
 123 #ifdef ASSERT
 124   bool         has_vtable_index() const          { return _call_index >= 0 && _call_kind != CallInfo::itable_call; }
 125   bool         is_statically_bound() const       { return _call_index == Method::nonvirtual_vtable_index; }


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