A node for control-flow feature generation. More...

#include <signature.hh>

Collaboration diagram for ghidra::BlockSignatureEntry:

Public Member Functions
	BlockSignatureEntry (BlockBasic *b)
	Construct from a basic block.

void	localHash (uint4 modifiers)
	Compute an initial hash based on local properties of the basic block.

void	flip (void)
	Store hash from previous iteration and prepare for next iteration.

void	hashIn (vector< BlockSignatureEntry * > &neigh)
	Hash info from other nodes into this.

BlockBasic *	getBlock (void) const
	Get the underlying basic block which this overlays.

hashword	getHash (void) const
	Get the current hash value.

Private Attributes
BlockBasic *	bl
	The root basic block.

hashword	hash [2]
	Current and previous hash.

Detailed Description

A node for control-flow feature generation.

A BlockSignatureEntry is rooted at a specific basic block in the control-flow of a function. During feature generation it iteratively hashes information about the basic block and its nearest neighbors through the edges of the control-flow graph.

Member Function Documentation

◆ hashIn()

void ghidra::BlockSignatureEntry::hashIn ( vector< BlockSignatureEntry * > & neigh )

Hash info from other nodes into this.

The previous hash value for this node is mixed together with previous hash values from other given nodes. The result becomes the current hash value for this node. The given nodes must correspond one-to-one with incoming blocks of this.

Parameters

neigh is the list of nodes coming in to this

References bl, ghidra::FlowBlock::getInRevIndex(), hash, and ghidra::FlowBlock::sizeOut().

Referenced by ghidra::GraphSigManager::signatureBlockIterate().