internal virtual LambdaForm FilterArgumentForm(int pos, BasicType newType) { Transform key = Transform.Of(Transform.Kind.FILTER_ARG, pos, newType.ordinal()); LambdaForm form = GetInCache(key); if (form != null) { assert(form.Arity_Renamed == LambdaForm.Arity_Renamed); assert(form.ParameterType(pos) == newType); return(form); } BasicType oldType = LambdaForm.ParameterType(pos); MethodType filterType = MethodType.MethodType(oldType.basicTypeClass(), newType.basicTypeClass()); form = MakeArgumentCombinationForm(pos, filterType, false, false); return(PutInCache(key, form)); }
static CallSite() { MethodHandleImpl.InitStatics(); try { GET_TARGET = IMPL_LOOKUP.findVirtual(typeof(CallSite), "getTarget", MethodType.MethodType(typeof(MethodHandle))); THROW_UCS = IMPL_LOOKUP.findStatic(typeof(CallSite), "uninitializedCallSite", MethodType.MethodType(typeof(Object), typeof(Object[]))); } catch (ReflectiveOperationException e) { throw newInternalError(e); } try { TARGET_OFFSET = UNSAFE.objectFieldOffset(typeof(CallSite).getDeclaredField("target")); } catch (Exception ex) { throw new Error(ex); } }
private static LambdaForm MakePreparedFieldLambdaForm(sbyte formOp, bool isVolatile, int ftypeKind) { bool isGetter = (formOp & 1) == (AF_GETFIELD & 1); bool isStatic = (formOp >= AF_GETSTATIC); bool needsInit = (formOp >= AF_GETSTATIC_INIT); bool needsCast = (ftypeKind == FT_CHECKED_REF); Wrapper fw = (needsCast ? Wrapper.OBJECT : Wrapper.values()[ftypeKind]); Class ft = fw.primitiveType(); assert(FtypeKind(needsCast ? typeof(String) : ft) == ftypeKind); String tname = fw.primitiveSimpleName(); String ctname = char.ToUpper(tname.CharAt(0)) + tname.Substring(1); if (isVolatile) { ctname += "Volatile"; } String getOrPut = (isGetter ? "get" : "put"); String linkerName = (getOrPut + ctname); // getObject, putIntVolatile, etc. MethodType linkerType; if (isGetter) { linkerType = MethodType.MethodType(ft, typeof(Object), typeof(long)); } else { linkerType = MethodType.methodType(typeof(void), typeof(Object), typeof(long), ft); } MemberName linker = new MemberName(typeof(Unsafe), linkerName, linkerType, REF_invokeVirtual); try { linker = IMPL_NAMES.ResolveOrFail(REF_invokeVirtual, linker, null, typeof(NoSuchMethodException)); } catch (ReflectiveOperationException ex) { throw newInternalError(ex); } // What is the external type of the lambda form? MethodType mtype; if (isGetter) { mtype = MethodType.MethodType(ft); } else { mtype = MethodType.MethodType(typeof(void), ft); } mtype = mtype.BasicType(); // erase short to int, etc. if (!isStatic) { mtype = mtype.InsertParameterTypes(0, typeof(Object)); } const int DMH_THIS = 0; const int ARG_BASE = 1; //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final int ARG_LIMIT = ARG_BASE + mtype.parameterCount(); int ARG_LIMIT = ARG_BASE + mtype.ParameterCount(); // if this is for non-static access, the base pointer is stored at this index: //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final int OBJ_BASE = isStatic ? -1 : ARG_BASE; int OBJ_BASE = isStatic ? -1 : ARG_BASE; // if this is for write access, the value to be written is stored at this index: //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final int SET_VALUE = isGetter ? -1 : ARG_LIMIT - 1; int SET_VALUE = isGetter ? -1 : ARG_LIMIT - 1; int nameCursor = ARG_LIMIT; //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final int F_HOLDER = (isStatic ? nameCursor++ : -1); int F_HOLDER = (isStatic ? nameCursor++: -1); // static base if any //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final int F_OFFSET = nameCursor++; int F_OFFSET = nameCursor++; // Either static offset or field offset. //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final int OBJ_CHECK = (OBJ_BASE >= 0 ? nameCursor++ : -1); int OBJ_CHECK = (OBJ_BASE >= 0 ? nameCursor++: -1); //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final int INIT_BAR = (needsInit ? nameCursor++ : -1); int INIT_BAR = (needsInit ? nameCursor++: -1); //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final int PRE_CAST = (needsCast && !isGetter ? nameCursor++ : -1); int PRE_CAST = (needsCast && !isGetter ? nameCursor++: -1); //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final int LINKER_CALL = nameCursor++; int LINKER_CALL = nameCursor++; //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final int POST_CAST = (needsCast && isGetter ? nameCursor++ : -1); int POST_CAST = (needsCast && isGetter ? nameCursor++: -1); //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final int RESULT = nameCursor-1; int RESULT = nameCursor - 1; // either the call or the cast Name[] names = arguments(nameCursor - ARG_LIMIT, mtype.InvokerType()); if (needsInit) { names[INIT_BAR] = new Name(Lazy.NF_ensureInitialized, names[DMH_THIS]); } if (needsCast && !isGetter) { names[PRE_CAST] = new Name(Lazy.NF_checkCast, names[DMH_THIS], names[SET_VALUE]); } Object[] outArgs = new Object[1 + linkerType.ParameterCount()]; assert(outArgs.Length == (isGetter ? 3 : 4)); outArgs[0] = UNSAFE; if (isStatic) { outArgs[1] = names[F_HOLDER] = new Name(Lazy.NF_staticBase, names[DMH_THIS]); outArgs[2] = names[F_OFFSET] = new Name(Lazy.NF_staticOffset, names[DMH_THIS]); } else { outArgs[1] = names[OBJ_CHECK] = new Name(Lazy.NF_checkBase, names[OBJ_BASE]); outArgs[2] = names[F_OFFSET] = new Name(Lazy.NF_fieldOffset, names[DMH_THIS]); } if (!isGetter) { outArgs[3] = (needsCast ? names[PRE_CAST] : names[SET_VALUE]); } foreach (Object a in outArgs) { assert(a != null); } names[LINKER_CALL] = new Name(linker, outArgs); if (needsCast && isGetter) { names[POST_CAST] = new Name(Lazy.NF_checkCast, names[DMH_THIS], names[LINKER_CALL]); } foreach (Name n in names) { assert(n != null); } String fieldOrStatic = (isStatic ? "Static" : "Field"); String lambdaName = (linkerName + fieldOrStatic); // significant only for debugging if (needsCast) { lambdaName += "Cast"; } if (needsInit) { lambdaName += "Init"; } return(new LambdaForm(lambdaName, ARG_LIMIT, names, RESULT)); }
internal virtual LambdaForm FilterReturnForm(BasicType newType, bool constantZero) { Transform.Kind kind = (constantZero ? Transform.Kind.FILTER_RETURN_TO_ZERO : Transform.Kind.FILTER_RETURN); Transform key = Transform.Of(kind, newType.ordinal()); LambdaForm form = GetInCache(key); if (form != null) { assert(form.Arity_Renamed == LambdaForm.Arity_Renamed); assert(form.ReturnType() == newType); return(form); } LambdaFormBuffer buf = Buffer(); buf.StartEdit(); int insPos = LambdaForm.Names.Length; Name callFilter; if (constantZero) { // Synthesize a constant zero value for the given type. if (newType == V_TYPE) { callFilter = null; } else { callFilter = new Name(constantZero(newType)); } } else { BoundMethodHandle.SpeciesData oldData = OldSpeciesData(); BoundMethodHandle.SpeciesData newData = NewSpeciesData(L_TYPE); // The newly created LF will run with a different BMH. // Switch over any pre-existing BMH field references to the new BMH class. Name oldBaseAddress = LambdaForm.Parameter(0); // BMH holding the values buf.ReplaceFunctions(oldData.GetterFunctions(), newData.GetterFunctions(), oldBaseAddress); Name newBaseAddress = oldBaseAddress.withConstraint(newData); buf.RenameParameter(0, newBaseAddress); Name getFilter = new Name(newData.GetterFunction(oldData.FieldCount()), newBaseAddress); buf.InsertExpression(insPos++, getFilter); BasicType oldType = LambdaForm.ReturnType(); if (oldType == V_TYPE) { MethodType filterType = MethodType.MethodType(newType.basicTypeClass()); callFilter = new Name(filterType, getFilter); } else { MethodType filterType = MethodType.MethodType(newType.basicTypeClass(), oldType.basicTypeClass()); callFilter = new Name(filterType, getFilter, LambdaForm.Names[LambdaForm.Result]); } } if (callFilter != null) { buf.InsertExpression(insPos++, callFilter); } buf.Result = callFilter; form = buf.EndEdit(); return(PutInCache(key, form)); }
/// <summary> /// Produces an instance of the given single-method interface which redirects /// its calls to the given method handle. /// <para> /// A single-method interface is an interface which declares a uniquely named method. /// When determining the uniquely named method of a single-method interface, /// the public {@code Object} methods ({@code toString}, {@code equals}, {@code hashCode}) /// are disregarded. For example, <seealso cref="java.util.Comparator"/> is a single-method interface, /// even though it re-declares the {@code Object.equals} method. /// </para> /// <para> /// The interface must be public. No additional access checks are performed. /// </para> /// <para> /// The resulting instance of the required type will respond to /// invocation of the type's uniquely named method by calling /// the given target on the incoming arguments, /// and returning or throwing whatever the target /// returns or throws. The invocation will be as if by /// {@code target.invoke}. /// The target's type will be checked before the /// instance is created, as if by a call to {@code asType}, /// which may result in a {@code WrongMethodTypeException}. /// </para> /// <para> /// The uniquely named method is allowed to be multiply declared, /// with distinct type descriptors. (E.g., it can be overloaded, /// or can possess bridge methods.) All such declarations are /// connected directly to the target method handle. /// Argument and return types are adjusted by {@code asType} /// for each individual declaration. /// </para> /// <para> /// The wrapper instance will implement the requested interface /// and its super-types, but no other single-method interfaces. /// This means that the instance will not unexpectedly /// pass an {@code instanceof} test for any unrequested type. /// <p style="font-size:smaller;"> /// <em>Implementation Note:</em> /// Therefore, each instance must implement a unique single-method interface. /// Implementations may not bundle together /// multiple single-method interfaces onto single implementation classes /// in the style of <seealso cref="java.awt.AWTEventMulticaster"/>. /// </para> /// <para> /// The method handle may throw an <em>undeclared exception</em>, /// which means any checked exception (or other checked throwable) /// not declared by the requested type's single abstract method. /// If this happens, the throwable will be wrapped in an instance of /// <seealso cref="java.lang.reflect.UndeclaredThrowableException UndeclaredThrowableException"/> /// and thrown in that wrapped form. /// </para> /// <para> /// Like <seealso cref="java.lang.Integer#valueOf Integer.valueOf"/>, /// {@code asInterfaceInstance} is a factory method whose results are defined /// by their behavior. /// It is not guaranteed to return a new instance for every call. /// </para> /// <para> /// Because of the possibility of <seealso cref="java.lang.reflect.Method#isBridge bridge methods"/> /// and other corner cases, the interface may also have several abstract methods /// with the same name but having distinct descriptors (types of returns and parameters). /// In this case, all the methods are bound in common to the one given target. /// The type check and effective {@code asType} conversion is applied to each /// method type descriptor, and all abstract methods are bound to the target in common. /// Beyond this type check, no further checks are made to determine that the /// abstract methods are related in any way. /// </para> /// <para> /// Future versions of this API may accept additional types, /// such as abstract classes with single abstract methods. /// Future versions of this API may also equip wrapper instances /// with one or more additional public "marker" interfaces. /// </para> /// <para> /// If a security manager is installed, this method is caller sensitive. /// During any invocation of the target method handle via the returned wrapper, /// the original creator of the wrapper (the caller) will be visible /// to context checks requested by the security manager. /// /// </para> /// </summary> /// @param <T> the desired type of the wrapper, a single-method interface </param> /// <param name="intfc"> a class object representing {@code T} </param> /// <param name="target"> the method handle to invoke from the wrapper </param> /// <returns> a correctly-typed wrapper for the given target </returns> /// <exception cref="NullPointerException"> if either argument is null </exception> /// <exception cref="IllegalArgumentException"> if the {@code intfc} is not a /// valid argument to this method </exception> /// <exception cref="WrongMethodTypeException"> if the target cannot /// be converted to the type required by the requested interface </exception> // Other notes to implementors: // <p> // No stable mapping is promised between the single-method interface and // the implementation class C. Over time, several implementation // classes might be used for the same type. // <p> // If the implementation is able // to prove that a wrapper of the required type // has already been created for a given // method handle, or for another method handle with the // same behavior, the implementation may return that wrapper in place of // a new wrapper. // <p> // This method is designed to apply to common use cases // where a single method handle must interoperate with // an interface that implements a function-like // API. Additional variations, such as single-abstract-method classes with // private constructors, or interfaces with multiple but related // entry points, must be covered by hand-written or automatically // generated adapter classes. // //JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes: //ORIGINAL LINE: @CallerSensitive public static <T> T asInterfaceInstance(final Class intfc, final MethodHandle target) //JAVA TO C# CONVERTER WARNING: 'final' parameters are not allowed in .NET: public static T asInterfaceInstance <T>(Class intfc, MethodHandle target) { if (!intfc.Interface || !Modifier.IsPublic(intfc.Modifiers)) { throw newIllegalArgumentException("not a public interface", intfc.Name); } //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final MethodHandle mh; MethodHandle mh; if (System.SecurityManager != null) { //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final Class caller = sun.reflect.Reflection.getCallerClass(); Class caller = Reflection.CallerClass; //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final ClassLoader ccl = caller != null ? caller.getClassLoader() : null; ClassLoader ccl = caller != null ? caller.ClassLoader : null; ReflectUtil.checkProxyPackageAccess(ccl, intfc); mh = ccl != null?BindCaller(target, caller) : target; } else { mh = target; } ClassLoader proxyLoader = intfc.ClassLoader; if (proxyLoader == null) { ClassLoader cl = Thread.CurrentThread.ContextClassLoader; // avoid use of BCP proxyLoader = cl != null ? cl : ClassLoader.SystemClassLoader; } //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final Method[] methods = getSingleNameMethods(intfc); Method[] methods = GetSingleNameMethods(intfc); if (methods == null) { throw newIllegalArgumentException("not a single-method interface", intfc.Name); } //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final MethodHandle[] vaTargets = new MethodHandle[methods.length]; MethodHandle[] vaTargets = new MethodHandle[methods.Length]; for (int i = 0; i < methods.Length; i++) { Method sm = methods[i]; MethodType smMT = MethodType.MethodType(sm.ReturnType, sm.ParameterTypes); MethodHandle checkTarget = mh.AsType(smMT); // make throw WMT checkTarget = checkTarget.AsType(checkTarget.Type().ChangeReturnType(typeof(Object))); vaTargets[i] = checkTarget.AsSpreader(typeof(Object[]), smMT.ParameterCount()); } //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final InvocationHandler ih = new InvocationHandler() InvocationHandler ih = new InvocationHandlerAnonymousInnerClassHelper(intfc, target, methods, vaTargets); //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final Object proxy; Object proxy; if (System.SecurityManager != null) { // sun.invoke.WrapperInstance is a restricted interface not accessible // by any non-null class loader. //JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final': //ORIGINAL LINE: final ClassLoader loader = proxyLoader; ClassLoader loader = proxyLoader; proxy = AccessController.doPrivileged(new PrivilegedActionAnonymousInnerClassHelper(intfc, ih, loader)); } else { proxy = Proxy.NewProxyInstance(proxyLoader, new Class[] { intfc, typeof(WrapperInstance) }, ih); } return(intfc.Cast(proxy)); }