Examples with ClassNameNode org.checkerframework.dataflow.cfg.node.ClassNameNode used on opensource projects

Example 1 with ClassNameNode

use of org.checkerframework.dataflow.cfg.node.ClassNameNode in project bazel by bazelbuild.

the class FlowExpressions method internalReprOf.

/**
     * We ignore operations such as widening and
     * narrowing when computing the internal representation.
     *
     * @return The internal representation (as {@link Receiver}) of any
     *         {@link Node}. Might contain {@link Unknown}.
     */
public static Receiver internalReprOf(AnnotationProvider provider, Node receiverNode, boolean allowNonDeterminitic) {
    Receiver receiver = null;
    if (receiverNode instanceof FieldAccessNode) {
        FieldAccessNode fan = (FieldAccessNode) receiverNode;
        if (fan.getFieldName().equals("this")) {
            // For some reason, "className.this" is considered a field access.
            // We right this wrong here.
            receiver = new ThisReference(fan.getReceiver().getType());
        } else {
            receiver = internalReprOfFieldAccess(provider, fan);
        }
    } else if (receiverNode instanceof ExplicitThisLiteralNode) {
        receiver = new ThisReference(receiverNode.getType());
    } else if (receiverNode instanceof ThisLiteralNode) {
        receiver = new ThisReference(receiverNode.getType());
    } else if (receiverNode instanceof SuperNode) {
        receiver = new ThisReference(receiverNode.getType());
    } else if (receiverNode instanceof LocalVariableNode) {
        LocalVariableNode lv = (LocalVariableNode) receiverNode;
        receiver = new LocalVariable(lv);
    } else if (receiverNode instanceof ArrayAccessNode) {
        ArrayAccessNode a = (ArrayAccessNode) receiverNode;
        receiver = internalReprOfArrayAccess(provider, a);
    } else if (receiverNode instanceof StringConversionNode) {
        // ignore string conversion
        return internalReprOf(provider, ((StringConversionNode) receiverNode).getOperand());
    } else if (receiverNode instanceof WideningConversionNode) {
        // ignore widening
        return internalReprOf(provider, ((WideningConversionNode) receiverNode).getOperand());
    } else if (receiverNode instanceof NarrowingConversionNode) {
        // ignore narrowing
        return internalReprOf(provider, ((NarrowingConversionNode) receiverNode).getOperand());
    } else if (receiverNode instanceof ClassNameNode) {
        ClassNameNode cn = (ClassNameNode) receiverNode;
        receiver = new ClassName(cn.getType());
    } else if (receiverNode instanceof ValueLiteralNode) {
        ValueLiteralNode vn = (ValueLiteralNode) receiverNode;
        receiver = new ValueLiteral(vn.getType(), vn);
    } else if (receiverNode instanceof MethodInvocationNode) {
        MethodInvocationNode mn = (MethodInvocationNode) receiverNode;
        ExecutableElement invokedMethod = TreeUtils.elementFromUse(mn.getTree());
        // check if this represents a boxing operation of a constant, in which
        // case we treat the method call as deterministic, because there is no way
        // to behave differently in two executions where two constants are being used.
        boolean considerDeterministic = false;
        if (invokedMethod.toString().equals("valueOf(long)") && mn.getTarget().getReceiver().toString().equals("Long")) {
            Node arg = mn.getArgument(0);
            if (arg instanceof ValueLiteralNode) {
                considerDeterministic = true;
            }
        }
        if (PurityUtils.isDeterministic(provider, invokedMethod) || allowNonDeterminitic || considerDeterministic) {
            List<Receiver> parameters = new ArrayList<>();
            for (Node p : mn.getArguments()) {
                parameters.add(internalReprOf(provider, p));
            }
            Receiver methodReceiver;
            if (ElementUtils.isStatic(invokedMethod)) {
                methodReceiver = new ClassName(mn.getTarget().getReceiver().getType());
            } else {
                methodReceiver = internalReprOf(provider, mn.getTarget().getReceiver());
            }
            receiver = new PureMethodCall(mn.getType(), invokedMethod, methodReceiver, parameters);
        }
    }
    if (receiver == null) {
        receiver = new Unknown(receiverNode.getType());
    }
    return receiver;
}

Example 2 with ClassNameNode

use of org.checkerframework.dataflow.cfg.node.ClassNameNode in project checker-framework by typetools.

the class RegexTransfer method visitMethodInvocation.

// TODO: These are special cases for isRegex(String, int) and asRegex(String, int).  They should
// be replaced by adding an @EnsuresQualifierIf annotation that supports specifying attributes.
@Override
public TransferResult<CFValue, CFStore> visitMethodInvocation(MethodInvocationNode n, TransferInput<CFValue, CFStore> in) {
    TransferResult<CFValue, CFStore> result = super.visitMethodInvocation(n, in);
    // refine result for some helper methods
    MethodAccessNode target = n.getTarget();
    ExecutableElement method = target.getMethod();
    Node receiver = target.getReceiver();
    if (receiver instanceof ClassNameNode) {
        ClassNameNode cnn = (ClassNameNode) receiver;
        String receiverName = cnn.getElement().toString();
        if (isRegexUtil(receiverName)) {
            result = handleRegexUtil(n, method, result);
        }
    }
    return result;
}

Example 3 with ClassNameNode

use of org.checkerframework.dataflow.cfg.node.ClassNameNode in project checker-framework by typetools.

the class CFGTranslationPhaseOne method box.

/**
 * If the input node is an unboxed primitive type, insert a call to the appropriate valueOf
 * method, otherwise leave it alone.
 *
 * @param node in input node
 * @return a Node representing the boxed version of the input, which may simply be the input node
 */
protected Node box(Node node) {
    // For boxing conversion, see JLS 5.1.7
    if (TypesUtils.isPrimitive(node.getType())) {
        PrimitiveType primitive = types.getPrimitiveType(node.getType().getKind());
        TypeMirror boxedType = types.getDeclaredType(types.boxedClass(primitive));
        TypeElement boxedElement = (TypeElement) ((DeclaredType) boxedType).asElement();
        IdentifierTree classTree = treeBuilder.buildClassUse(boxedElement);
        handleArtificialTree(classTree);
        // No need to handle possible errors from evaluating a class literal here
        // since this is synthetic code that can't fail.
        ClassNameNode className = new ClassNameNode(classTree);
        className.setInSource(false);
        insertNodeAfter(className, node);
        MemberSelectTree valueOfSelect = treeBuilder.buildValueOfMethodAccess(classTree);
        handleArtificialTree(valueOfSelect);
        MethodAccessNode valueOfAccess = new MethodAccessNode(valueOfSelect, className);
        valueOfAccess.setInSource(false);
        insertNodeAfter(valueOfAccess, className);
        MethodInvocationTree valueOfCall = treeBuilder.buildMethodInvocation(valueOfSelect, (ExpressionTree) node.getTree());
        handleArtificialTree(valueOfCall);
        Node boxed = new MethodInvocationNode(valueOfCall, valueOfAccess, Collections.singletonList(node), getCurrentPath());
        boxed.setInSource(false);
        // Add Throwable to account for unchecked exceptions
        addToConvertedLookupMap(node.getTree(), boxed);
        insertNodeWithExceptionsAfter(boxed, uncheckedExceptionTypes, valueOfAccess);
        return boxed;
    } else {
        return node;
    }
}

Example 4 with ClassNameNode

use of org.checkerframework.dataflow.cfg.node.ClassNameNode in project checker-framework by typetools.

the class FlowExpressions method internalReprOf.

/**
 * We ignore operations such as widening and narrowing when computing the internal
 * representation.
 *
 * @return the internal representation (as {@link Receiver}) of any {@link Node}. Might contain
 *     {@link Unknown}.
 */
public static Receiver internalReprOf(AnnotationProvider provider, Node receiverNode, boolean allowNonDeterministic) {
    Receiver receiver = null;
    if (receiverNode instanceof FieldAccessNode) {
        FieldAccessNode fan = (FieldAccessNode) receiverNode;
        if (fan.getFieldName().equals("this")) {
            // For some reason, "className.this" is considered a field access.
            // We right this wrong here.
            receiver = new ThisReference(fan.getReceiver().getType());
        } else if (fan.getFieldName().equals("class")) {
            // "className.class" is considered a field access. This makes sense,
            // since .class is similar to a field access which is the equivalent
            // of a call to getClass(). However for the purposes of dataflow
            // analysis, and value stores, this is the equivalent of a ClassNameNode.
            receiver = new ClassName(fan.getReceiver().getType());
        } else {
            receiver = internalReprOfFieldAccess(provider, fan);
        }
    } else if (receiverNode instanceof ExplicitThisLiteralNode) {
        receiver = new ThisReference(receiverNode.getType());
    } else if (receiverNode instanceof ThisLiteralNode) {
        receiver = new ThisReference(receiverNode.getType());
    } else if (receiverNode instanceof SuperNode) {
        receiver = new ThisReference(receiverNode.getType());
    } else if (receiverNode instanceof LocalVariableNode) {
        LocalVariableNode lv = (LocalVariableNode) receiverNode;
        receiver = new LocalVariable(lv);
    } else if (receiverNode instanceof ArrayAccessNode) {
        ArrayAccessNode a = (ArrayAccessNode) receiverNode;
        receiver = internalReprOfArrayAccess(provider, a);
    } else if (receiverNode instanceof StringConversionNode) {
        // ignore string conversion
        return internalReprOf(provider, ((StringConversionNode) receiverNode).getOperand());
    } else if (receiverNode instanceof WideningConversionNode) {
        // ignore widening
        return internalReprOf(provider, ((WideningConversionNode) receiverNode).getOperand());
    } else if (receiverNode instanceof NarrowingConversionNode) {
        // ignore narrowing
        return internalReprOf(provider, ((NarrowingConversionNode) receiverNode).getOperand());
    } else if (receiverNode instanceof ClassNameNode) {
        ClassNameNode cn = (ClassNameNode) receiverNode;
        receiver = new ClassName(cn.getType());
    } else if (receiverNode instanceof ValueLiteralNode) {
        ValueLiteralNode vn = (ValueLiteralNode) receiverNode;
        receiver = new ValueLiteral(vn.getType(), vn);
    } else if (receiverNode instanceof ArrayCreationNode) {
        ArrayCreationNode an = (ArrayCreationNode) receiverNode;
        List<Receiver> dimensions = new ArrayList<>();
        for (Node dimension : an.getDimensions()) {
            dimensions.add(internalReprOf(provider, dimension, allowNonDeterministic));
        }
        List<Receiver> initializers = new ArrayList<>();
        for (Node initializer : an.getInitializers()) {
            initializers.add(internalReprOf(provider, initializer, allowNonDeterministic));
        }
        receiver = new ArrayCreation(an.getType(), dimensions, initializers);
    } else if (receiverNode instanceof MethodInvocationNode) {
        MethodInvocationNode mn = (MethodInvocationNode) receiverNode;
        ExecutableElement invokedMethod = TreeUtils.elementFromUse(mn.getTree());
        // check if this represents a boxing operation of a constant, in which
        // case we treat the method call as deterministic, because there is no way
        // to behave differently in two executions where two constants are being used.
        boolean considerDeterministic = false;
        if (isLongValueOf(mn, invokedMethod)) {
            Node arg = mn.getArgument(0);
            if (arg instanceof ValueLiteralNode) {
                considerDeterministic = true;
            }
        }
        if (PurityUtils.isDeterministic(provider, invokedMethod) || allowNonDeterministic || considerDeterministic) {
            List<Receiver> parameters = new ArrayList<>();
            for (Node p : mn.getArguments()) {
                parameters.add(internalReprOf(provider, p));
            }
            Receiver methodReceiver;
            if (ElementUtils.isStatic(invokedMethod)) {
                methodReceiver = new ClassName(mn.getTarget().getReceiver().getType());
            } else {
                methodReceiver = internalReprOf(provider, mn.getTarget().getReceiver());
            }
            receiver = new MethodCall(mn.getType(), invokedMethod, methodReceiver, parameters);
        }
    }
    if (receiver == null) {
        receiver = new Unknown(receiverNode.getType());
    }
    return receiver;
}

Example 5 with ClassNameNode

use of org.checkerframework.dataflow.cfg.node.ClassNameNode in project checker-framework by typetools.

the class CFGTranslationPhaseOne method visitMemberSelect.

@Override
public Node visitMemberSelect(MemberSelectTree tree, Void p) {
    Node expr = scan(tree.getExpression(), p);
    if (!TreeUtils.isFieldAccess(tree)) {
        // Could be a selector of a class or package
        Element element = TreeUtils.elementFromUse(tree);
        if (ElementUtils.isTypeElement(element)) {
            ClassNameNode result = new ClassNameNode(tree, expr);
            extendWithClassNameNode(result);
            return result;
        } else if (element.getKind() == ElementKind.PACKAGE) {
            Node result = new PackageNameNode(tree, (PackageNameNode) expr);
            extendWithNode(result);
            return result;
        } else {
            throw new BugInCF("Unexpected element kind: " + element.getKind());
        }
    }
    Node node = new FieldAccessNode(tree, expr);
    Element element = TreeUtils.elementFromUse(tree);
    if (ElementUtils.isStatic(element) || expr instanceof ImplicitThisNode || expr instanceof ExplicitThisNode) {
        // No NullPointerException can be thrown, use normal node
        extendWithNode(node);
    } else {
        extendWithNodeWithException(node, nullPointerExceptionType);
    }
    return node;
}