Class BarrierGuard

DEPRECATED: Use BarrierGuard module instead.

A guard that validates some expression.

To use this in a configuration, extend the class and provide a characteristic predicate precisely specifying the guard, and override checks to specify what is being validated and in which branch.

It is important that all extending classes in scope are disjoint.

Import path


                                import semmle.python.dataflow.new.internal.DataFlowPublic

Direct supertypes

GuardNode

Indirect supertypes

Known direct subtypes

Inherited fields

conditionBlock		from GuardNode
flipped		from GuardNode

Predicates

checks	Holds if this guard validates `node` upon evaluating to `branch`.
getAGuardedNode	Gets a node guarded by this guard.

Inherited predicates

controlsBlock	Holds if this guard controls block `b` upon evaluating to `branch`.	from GuardNode
dominates	Whether this dominates other. Note that all nodes dominate themselves.	from ControlFlowNode
getAChild		from ControlFlowNode
getAFalseSuccessor	Gets a successor for this node if the relevant condition is False.	from ControlFlowNode
getANormalSuccessor	Gets a successor for this node if no exception is raised.	from ControlFlowNode
getAPredecessor	Gets a predecessor of this flow node	from ControlFlowNode
getASuccessor	Gets a successor of this flow node	from ControlFlowNode
getATrueSuccessor	Gets a successor for this node if the relevant condition is True.	from ControlFlowNode
getAnExceptionalSuccessor	Gets a successor for this node if an exception is raised.	from ControlFlowNode
getBasicBlock	Gets the basic block containing this flow node	from ControlFlowNode
getEnclosingModule	Gets the enclosing module	from ControlFlowNode
getImmediateDominator	Gets the immediate dominator of this flow node	from ControlFlowNode
getLocation	Gets the location of this ControlFlowNode	from ControlFlowNode
getNode	Gets the syntactic element corresponding to this flow node	from ControlFlowNode
getScope	Gets the scope containing this flow node	from ControlFlowNode
hasCompletePointsToSet	Check whether this control-flow node has complete points-to information. This would mean that the analysis managed to infer an over approximation of possible values at runtime.	from ControlFlowNode
inferredValue	Gets a value that this ControlFlowNode may points-to.	from ControlFlowNode
isAttribute	Whether this flow node corresponds to an attribute expression	from ControlFlowNode
isAugLoad	Whether this control flow node is a load in an augmented assignment	from ControlFlowNode
isAugStore	Whether this control flow node is a store in an augmented assignment	from ControlFlowNode
isBranch	Holds if this CFG node is a branch	from ControlFlowNode
isCall	Whether this flow node corresponds to a call	from ControlFlowNode
isClass	Whether this flow node corresponds to a class definition expression	from ControlFlowNode
isDelete	Whether this control flow node is a delete	from ControlFlowNode
isEntryNode	Whether this flow node is the first in its scope	from ControlFlowNode
isExceptionalExit	Whether the scope may be exited as a result of this node raising an exception	from ControlFlowNode
isFunction	Whether this flow node corresponds to a function definition expression	from ControlFlowNode
isIfExp	Whether this flow node corresponds to a conditional expression	from ControlFlowNode
isImport	Whether this flow node corresponds to an import	from ControlFlowNode
isImportMember	Whether this flow node corresponds to an import member	from ControlFlowNode
isLiteral	Whether this flow node corresponds to a literal	from ControlFlowNode
isLoad	Whether this control flow node is a load (including those in augmented assignments)	from ControlFlowNode
isModuleEntry	Whether this flow node is the first in a module	from ControlFlowNode
isNormalExit	Whether this node is a normal (non-exceptional) exit	from ControlFlowNode
isParameter	Whether this control flow node is a parameter	from ControlFlowNode
isStore	Whether this control flow node is a store (including those in augmented assignments)	from ControlFlowNode
isSubscript	Whether this flow node corresponds to an subscript expression	from ControlFlowNode
pointsTo	Gets the value that this ControlFlowNode points-to.	from ControlFlowNode
pointsTo	Gets the value that this ControlFlowNode points-to.	from ControlFlowNode
pointsTo	Gets the value and origin that this ControlFlowNode points-to.	from ControlFlowNode
pointsTo	Gets the value and origin that this ControlFlowNode points-to, given the context.	from ControlFlowNode
refersTo	Equivalent to `this.refersTo(value, _)`	from ControlFlowNode
refersTo	Whether this flow node might “refer-to” to `value` which is from `origin` Unlike `this.refersTo(value, _, origin)` this predicate includes results where the class cannot be inferred.	from ControlFlowNode
refersTo	Gets what this flow node might “refer-to”. Performs a combination of localized (intra-procedural) points-to analysis and global module-level analysis. This points-to analysis favours precision over recall. It is highly precise, but may not provide information for a significant number of flow-nodes. If the class is unimportant then use `refersTo(value)` or `refersTo(value, origin)` instead.	from ControlFlowNode
refersTo	Gets what this expression might “refer-to” in the given `context`.	from ControlFlowNode
strictlyDominates	Whether this strictly dominates other.	from ControlFlowNode
strictlyReaches	Whether this strictly reaches other.	from ControlFlowNode
toString	Gets a textual representation of this element.	from ControlFlowNode
unlikelyReachable	Whether it is unlikely that this ControlFlowNode can be reached	from ControlFlowNode