964 OP_SPREAD_ARGS = 0xB, // expand in place a varargs array (of known size)
965 OP_FOLD_ARGS = 0xC, // combine but do not remove arguments; prepend result
966 //OP_UNUSED_13 = 0xD, // unused code, perhaps for reified argument lists
967 CONV_OP_LIMIT = 0xE, // limit of CONV_OP enumeration
968
969 CONV_OP_MASK = 0xF00, // this nybble contains the conversion op field
970 CONV_TYPE_MASK = 0x0F, // fits T_ADDRESS and below
971 CONV_VMINFO_MASK = 0x0FF, // LSB is reserved for JVM use
972 CONV_VMINFO_SHIFT = 0, // position of bits in CONV_VMINFO_MASK
973 CONV_OP_SHIFT = 8, // position of bits in CONV_OP_MASK
974 CONV_DEST_TYPE_SHIFT = 12, // byte 2 has the adapter BasicType (if needed)
975 CONV_SRC_TYPE_SHIFT = 16, // byte 2 has the source BasicType (if needed)
976 CONV_STACK_MOVE_SHIFT = 20, // high 12 bits give signed SP change
977 CONV_STACK_MOVE_MASK = (1 << (32 - CONV_STACK_MOVE_SHIFT)) - 1
978 };
979
980 static int conversion_offset_in_bytes() { return _conversion_offset; }
981 };
982
983
984 // Interface to java.lang.invoke.MemberName objects
985 // (These are a private interface for Java code to query the class hierarchy.)
986
987 class java_lang_invoke_MemberName: AllStatic {
988 friend class JavaClasses;
989
990 private:
991 // From java.lang.invoke.MemberName:
992 // private Class<?> clazz; // class in which the method is defined
993 // private String name; // may be null if not yet materialized
994 // private Object type; // may be null if not yet materialized
995 // private int flags; // modifier bits; see reflect.Modifier
996 // private Object vmtarget; // VM-specific target value
997 // private int vmindex; // method index within class or interface
998 static int _clazz_offset;
999 static int _name_offset;
1000 static int _type_offset;
1001 static int _flags_offset;
1002 static int _vmtarget_offset;
1003 static int _vmindex_offset;
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964 OP_SPREAD_ARGS = 0xB, // expand in place a varargs array (of known size)
965 OP_FOLD_ARGS = 0xC, // combine but do not remove arguments; prepend result
966 //OP_UNUSED_13 = 0xD, // unused code, perhaps for reified argument lists
967 CONV_OP_LIMIT = 0xE, // limit of CONV_OP enumeration
968
969 CONV_OP_MASK = 0xF00, // this nybble contains the conversion op field
970 CONV_TYPE_MASK = 0x0F, // fits T_ADDRESS and below
971 CONV_VMINFO_MASK = 0x0FF, // LSB is reserved for JVM use
972 CONV_VMINFO_SHIFT = 0, // position of bits in CONV_VMINFO_MASK
973 CONV_OP_SHIFT = 8, // position of bits in CONV_OP_MASK
974 CONV_DEST_TYPE_SHIFT = 12, // byte 2 has the adapter BasicType (if needed)
975 CONV_SRC_TYPE_SHIFT = 16, // byte 2 has the source BasicType (if needed)
976 CONV_STACK_MOVE_SHIFT = 20, // high 12 bits give signed SP change
977 CONV_STACK_MOVE_MASK = (1 << (32 - CONV_STACK_MOVE_SHIFT)) - 1
978 };
979
980 static int conversion_offset_in_bytes() { return _conversion_offset; }
981 };
982
983
984 // A simple class that maintains an invocation count
985 class java_lang_invoke_CountingMethodHandle: public java_lang_invoke_MethodHandle {
986 friend class JavaClasses;
987
988 private:
989 static int _vmcount_offset;
990 static void compute_offsets();
991
992 public:
993 // Accessors
994 static int vmcount(oop mh);
995 static void set_vmcount(oop mh, int count);
996
997 // Testers
998 static bool is_subclass(klassOop klass) {
999 return SystemDictionary::CountingMethodHandle_klass() != NULL &&
1000 Klass::cast(klass)->is_subclass_of(SystemDictionary::CountingMethodHandle_klass());
1001 }
1002 static bool is_instance(oop obj) {
1003 return obj != NULL && is_subclass(obj->klass());
1004 }
1005
1006 // Accessors for code generation:
1007 static int vmcount_offset_in_bytes() { return _vmcount_offset; }
1008 };
1009
1010
1011
1012 // Interface to java.lang.invoke.MemberName objects
1013 // (These are a private interface for Java code to query the class hierarchy.)
1014
1015 class java_lang_invoke_MemberName: AllStatic {
1016 friend class JavaClasses;
1017
1018 private:
1019 // From java.lang.invoke.MemberName:
1020 // private Class<?> clazz; // class in which the method is defined
1021 // private String name; // may be null if not yet materialized
1022 // private Object type; // may be null if not yet materialized
1023 // private int flags; // modifier bits; see reflect.Modifier
1024 // private Object vmtarget; // VM-specific target value
1025 // private int vmindex; // method index within class or interface
1026 static int _clazz_offset;
1027 static int _name_offset;
1028 static int _type_offset;
1029 static int _flags_offset;
1030 static int _vmtarget_offset;
1031 static int _vmindex_offset;
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