GSA-Fuzz: Optimize Seed Mutation with Gravitational Search Algorithm

Table 1

Defined mutation operators in AFL.

Name	Type	Function
BITFLIP	bitflip1/1	Randomly flip some bits of a seed
	bitflip2/1
	bitflip4/1
	bitflip8/8
	bitflip16/8
	bitflip32/8
ARITHMETIC INC/DEC	arith8/8	Perform integer addition or subtraction mutation on some bytes of the seed
	arith16/8
	arith32/8
INTERESTING VALUES	interest8/8	Replace some bytes in the seed with interesting values
	interest16/8
	interest32/8
DICTIONARY STUFF	user_extras(over), user_extras(insert) auto extras(over)	Replace tokens provided by the user or detected by the system into the seed
RANDOMLY BYTE	add to byte	Randomly select a byte and add or subtract a value
	subtract from byte
DELETE BYTES	delete bytes	Randomly delete some bytes
CLONE BYTES	clone bytes	Randomly clone some bytes and insert them into the seed randomly clone some bytes
OVERWRITE BYTES	overwrite bytes	And overwrite them into the seed