Class Node

A node in a data flow graph.

A node can be either an expression, a parameter, or an uninitialized local variable. Such nodes are created with DataFlow::exprNode, DataFlow::parameterNode, and DataFlow::uninitializedNode respectively.

Import path

import semmle.code.cpp.ir.dataflow.internal.DataFlowUtil

Direct supertypes

TIRDataFlowNode

Known direct subtypes

Predicates

asCertainDefinition	Gets the definition associated with this node, if this node is a certain definition.
asConvertedExpr	Gets the expression corresponding to this node, if any. The returned expression may be a `Conversion`.
asConvertedExpr	Gets the expression corresponding to this node, if any. The returned expression may be a `Conversion`.
asDefiningArgument	Gets the argument that defines this `DefinitionByReferenceNode`, if any. This predicate should be used instead of `asExpr` when referring to the value of a reference argument after the call has returned. For example, in `f(&x)`, this predicate will have `&x` as its result for the `Node` that represents the new value of `x`.
asDefiningArgument	Gets the argument that defines this `DefinitionByReferenceNode`, if any.
asDefinition	Gets the definition associated with this node, if any.
asDefinition	Gets the definition associated with this node, if any.
asExpr	Gets the non-conversion expression corresponding to this node, if any. This predicate only has a result on nodes that represent the value of evaluating the expression. For data flowing out of an expression, like when an argument is passed by reference, use `asDefiningArgument` instead of `asExpr`.
asExpr	INTERNAL: Do not use.
asIndirectArgument	Gets the the argument going into a function for a node that represents the indirect value of the argument after any non-zero number of loads.
asIndirectArgument	Gets the the argument going into a function for a node that represents the indirect value of the argument after `index` loads. For example, in: `cpp void f(int); ... int x = ...; f(x);` The node `n` such that `n.asIndirectArgument(1)` represents the value of `x` going into `f`, and the node `n` such that `n.asIndirectArgument(2)` represents the value of `*x` going into `f`.
asIndirectConvertedExpr	Gets the expression that’s indirectly tracked by this node behind a number of indirections.
asIndirectConvertedExpr	Gets the expression that’s indirectly tracked by this node behind `index` number of indirections.
asIndirectConvertedExpr	INTERNAL: Do not use.
asIndirectDefinition	Gets the indirect definition at some indirection corresponding to this node, if any.
asIndirectDefinition	Gets the indirect definition at a given indirection corresponding to this node, if any.
asIndirectExpr	Gets the non-conversion expression that’s indirectly tracked by this node behind a number of indirections.
asIndirectExpr	Gets the non-conversion expression that’s indirectly tracked by this node under `index` number of indirections.
asIndirectExpr	INTERNAL: Do not use.
asIndirectOperand	Gets the operand that is indirectly tracked by this node behind `index` number of indirections.
asIndirectVariable	Gets an indirection of this node’s underlying variable, if any.
asIndirectVariable	Gets the `indirectionIndex`’th indirection of this node’s underlying variable, if any.
asInstruction	Gets the instruction corresponding to this node, if any.
asOperand	Gets the operands corresponding to this node, if any.
asParameter	Gets the positional parameter corresponding to this node, if any.
asParameter	Gets the positional parameter corresponding to the node that represents the value of the parameter after `index` number of loads, if any. For example, in: `cpp void f(int** x) { ... }` - The node `n` such that `n.asParameter(0)` is the parameter `x` represents the value of `x`. - The node `n` such that `n.asParameter(1)` is the parameter `x` represents the value of `x`. - The node `n` such that `n.asParameter(2)` is the parameter `x` represents the value of `*x`.
asPartialDefinition	Gets the expression that is partially defined by this node, if any.
asUncertainDefinition	Gets the definition associated with this node, if this node is an uncertain definition.
asUninitialized	Gets the uninitialized local variable corresponding to this node, if any.
asVariable	Gets the variable corresponding to this node, if any. This can be used for modeling flow in and out of global variables.
getBasicBlock	Gets the basic block of this node, if any.
getEnclosingCallable	INTERNAL: Do not use.
getFunction	Gets the function to which this node belongs, if any.
getLocation	Gets the location of this element.
getLocationImpl	INTERNAL: Do not use.
getType	Gets the type of this node.
getTypeBound	Gets an upper bound on the type of this node.
hasIndexInBlock	Holds if this node is at index `i` in basic block `block`.
isFinalValueOfParameter	Holds if this node represents the value of an output parameter `p` just before reaching the end of a function.
isFinalValueOfParameter	Holds if this node represents the `indirectionIndex`’th indirection of the value of an output parameter `p` just before reaching the end of a function.
isGLValue	Holds if this node represents a glvalue.
toString	Gets a textual representation of this element.
toStringImpl	INTERNAL: Do not use.