CodeQL library for C/C++
codeql/cpp-all 0.12.7-dev (changelog, source)
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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

Known direct subtypes

Predicates

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.

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.

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.

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.

hasLocationInfo

Holds if this element is at the specified location. The location spans column startcolumn of line startline to column endcolumn of line endline in file filepath. For more information, see Locations.

isGLValue

Holds if this node represents a glvalue.

toString

Gets a textual representation of this element.

toStringImpl

INTERNAL: Do not use.