com.oracle.truffle.js.nodes.function.InitFunctionNode Maven / Gradle / Ivy

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package com.oracle.truffle.js.nodes.function;

import com.oracle.truffle.api.object.DynamicObjectLibrary;
import com.oracle.truffle.api.strings.TruffleString;
import com.oracle.truffle.js.nodes.JavaScriptBaseNode;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.Properties;
import com.oracle.truffle.js.runtime.Strings;
import com.oracle.truffle.js.runtime.builtins.JSFunction;
import com.oracle.truffle.js.runtime.builtins.JSFunctionData;
import com.oracle.truffle.js.runtime.builtins.JSFunctionObject;
import com.oracle.truffle.js.runtime.objects.Accessor;
import com.oracle.truffle.js.runtime.objects.JSAttributes;
import com.oracle.truffle.js.runtime.objects.JSObject;
import com.oracle.truffle.js.runtime.objects.JSObjectUtil;
import com.oracle.truffle.js.runtime.objects.JSProperty;
import com.oracle.truffle.js.runtime.objects.Undefined;

public class InitFunctionNode extends JavaScriptBaseNode {
    private final JSFunctionData functionData;
    private final JSContext context;
    @Child private DynamicObjectLibrary setPrototypeNode;
    @Child private DynamicObjectLibrary setLengthNode;
    @Child private DynamicObjectLibrary setNameNode;
    @Child private DynamicObjectLibrary setArgumentsNode;
    @Child private DynamicObjectLibrary setCallerNode;
    private final int prototypeFlags;
    private final int lengthFlags;
    private final int nameFlags;
    private final int argumentsCallerFlags;
    private final boolean strictProperties;

    protected InitFunctionNode(JSFunctionData functionData, JSContext context, boolean strictProperties, boolean isConstructor, boolean isBound, boolean isGenerator, boolean prototypeNotWritable) {
        this.functionData = functionData;
        this.context = context;
        this.strictProperties = strictProperties;
        boolean hasPrototype = (isConstructor && !isBound) || isGenerator;
        if (hasPrototype) {
            int prototypeAttributes = prototypeNotWritable ? JSAttributes.notConfigurableNotEnumerableNotWritable() : JSAttributes.notConfigurableNotEnumerableWritable();
            this.prototypeFlags = prototypeAttributes | JSProperty.PROXY;
            this.setPrototypeNode = JSObjectUtil.createDispatched(JSObject.PROTOTYPE);
        } else {
            this.prototypeFlags = 0;
        }

        int lengthAttributes = context.getEcmaScriptVersion() < 6 ? JSAttributes.notConfigurableNotEnumerableNotWritable() : JSAttributes.configurableNotEnumerableNotWritable();
        this.lengthFlags = lengthAttributes | JSProperty.PROXY;
        this.setLengthNode = JSObjectUtil.createDispatched(JSFunction.LENGTH);

        int nameAttributes = JSAttributes.configurableNotEnumerableNotWritable();
        this.nameFlags = nameAttributes | JSProperty.PROXY;
        this.setNameNode = JSObjectUtil.createDispatched(JSFunction.NAME);

        boolean argumentsCaller = false;
        int argumentsCallerAttributes = 0;
        if (context.getEcmaScriptVersion() >= 6) {
            if (!strictProperties) {
                argumentsCaller = true;
                argumentsCallerAttributes = JSAttributes.notConfigurableNotEnumerableNotWritable();
            }
        } else {
            if (strictProperties) {
                argumentsCaller = true;
                argumentsCallerAttributes = JSAttributes.notConfigurableNotEnumerable() | JSProperty.ACCESSOR;
            }
        }
        if (argumentsCaller) {
            this.setArgumentsNode = JSObjectUtil.createDispatched(JSFunction.ARGUMENTS);
            this.setCallerNode = JSObjectUtil.createDispatched(JSFunction.CALLER);
        }
        this.argumentsCallerFlags = argumentsCallerAttributes;
    }

    protected InitFunctionNode(JSFunctionData functionData) {
        this(functionData, functionData.getContext(), functionData.hasStrictFunctionProperties(), functionData.isConstructor(), functionData.isBound(), functionData.isGenerator(),
                        functionData.isPrototypeNotWritable());
        assert !functionData.isBuiltin();
    }

    public static InitFunctionNode create(JSContext context, boolean strictProperties, boolean isConstructor, boolean isBound, boolean isGenerator, boolean prototypeNotWritable) {
        return new InitFunctionNode(null, context, strictProperties, isConstructor, isBound, isGenerator, prototypeNotWritable);
    }

    public static InitFunctionNode create(JSFunctionData functionData) {
        return new InitFunctionNode(functionData);
    }

    public final JSFunctionObject execute(JSFunctionObject function) {
        return execute(function, functionData.getLength(), functionData.getName());
    }

    public final JSFunctionObject execute(JSFunctionObject function, @SuppressWarnings("hiding") JSFunctionData functionData) {
        return execute(function, functionData.getLength(), functionData.getName());
    }

    public final JSFunctionObject execute(JSFunctionObject function, int length, TruffleString name) {
        // setLengthNode.putWithFlags(function, JSFunction.LENGTH, length, lengthFlags);
        Properties.putConstant(setLengthNode, function, JSFunction.LENGTH, JSFunction.LENGTH_PROXY, lengthFlags);
        assert function instanceof JSFunctionObject.BoundOrWrapped || length == (int) JSFunction.LENGTH_PROXY.get(function);

        // setNameNode.putWithFlags(function, JSFunction.NAME, name, nameFlags);
        Properties.putConstant(setNameNode, function, JSFunction.NAME, JSFunction.NAME_PROXY, nameFlags);
        assert function instanceof JSFunctionObject.BoundOrWrapped || Strings.equals(name, (TruffleString) JSFunction.NAME_PROXY.get(function));

        if (context.getEcmaScriptVersion() >= 6) {
            if (!strictProperties) {
                if (context.isOptionV8CompatibilityMode()) {
                    Properties.putConstant(setArgumentsNode, function, JSFunction.ARGUMENTS, JSFunction.ARGUMENTS_PROXY, argumentsCallerFlags | JSProperty.PROXY);
                    Properties.putConstant(setCallerNode, function, JSFunction.CALLER, JSFunction.CALLER_PROXY, argumentsCallerFlags | JSProperty.PROXY);
                } else {
                    Properties.putConstant(setArgumentsNode, function, JSFunction.ARGUMENTS, Undefined.instance, argumentsCallerFlags);
                    Properties.putConstant(setCallerNode, function, JSFunction.CALLER, Undefined.instance, argumentsCallerFlags);
                }
            }
        } else {
            if (strictProperties) {
                Accessor throwerAccessor = JSFunction.getRealm(function).getThrowerAccessor();
                Properties.putWithFlags(setArgumentsNode, function, JSFunction.ARGUMENTS, throwerAccessor, argumentsCallerFlags);
                Properties.putWithFlags(setCallerNode, function, JSFunction.CALLER, throwerAccessor, argumentsCallerFlags);
            }
        }

        if (setPrototypeNode != null) {
            Properties.putConstant(setPrototypeNode, function, JSObject.PROTOTYPE, JSFunction.PROTOTYPE_PROXY, prototypeFlags);
        }

        return function;
    }
}