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How to use randInsn method of ifuzz Package

Best Syzkaller code snippet using ifuzz.randInsn

ifuzz.go

Source:ifuzz.go

...22)23func Generate(cfg *Config, r *rand.Rand) []byte {24	var text []byte25	for i := 0; i < cfg.Len; i++ {26		insn := randInsn(cfg, r)27		text = append(text, insn.Encode(cfg, r)...)28	}29	return text30}31func Mutate(cfg *Config, r *rand.Rand, text []byte) []byte {32	insns := split(cfg, text)33	retry := false34	for stop := false; !stop || retry || len(insns) == 0; stop = r.Intn(2) == 0 {35		retry = false36		switch x := r.Intn(100); {37		case x < 10 && len(insns) != 0:38			// Delete instruction.39			i := r.Intn(len(insns))40			copy(insns[i:], insns[i+1:])41			insns = insns[:len(insns)-1]42		case x < 40 && len(insns) != 0:43			// Replace instruction with another.44			insn := randInsn(cfg, r)45			text1 := insn.Encode(cfg, r)46			i := r.Intn(len(insns))47			insns[i] = text148		case x < 70 && len(insns) != 0:49			// Mutate instruction.50			i := r.Intn(len(insns))51			text1 := insns[i]52			for stop := false; !stop || len(text1) == 0; stop = r.Intn(2) == 0 {53				switch x := r.Intn(100); {54				case x < 5 && len(text1) != 0:55					// Delete byte.56					pos := r.Intn(len(text1))57					copy(text1[pos:], text1[pos+1:])58					text1 = text1[:len(text1)-1]59				case x < 40 && len(text1) != 0:60					// Replace a byte.61					pos := r.Intn(len(text1))62					text1[pos] = byte(r.Intn(256))63				case x < 70 && len(text1) != 0:64					// Flip a bit.65					pos := r.Intn(len(text1))66					text1[pos] ^= 1 << byte(r.Intn(8))67				default:68					// Insert a byte.69					pos := r.Intn(len(text1) + 1)70					text1 = append(text1, 0)71					copy(text1[pos+1:], text1[pos:])72					text1[pos] = byte(r.Intn(256))73				}74			}75			insns[i] = text176		case len(insns) < cfg.Len:77			// Insert a new instruction.78			insn := randInsn(cfg, r)79			text1 := insn.Encode(cfg, r)80			i := r.Intn(len(insns) + 1)81			insns = append(insns, nil)82			copy(insns[i+1:], insns[i:])83			insns[i] = text184		default:85			retry = true86		}87	}88	text = nil89	for _, insn := range insns {90		text = append(text, insn...)91	}92	return text93}94func randInsn(cfg *Config, r *rand.Rand) iset.Insn {95	insnset := iset.Arches[cfg.Arch]96	var insns []iset.Insn97	if cfg.Priv && cfg.Exec {98		insns = insnset.GetInsns(cfg.Mode, iset.Type(r.Intn(3)))99	} else if cfg.Priv {100		insns = insnset.GetInsns(cfg.Mode, iset.Type(r.Intn(2)))101	} else {102		insns = insnset.GetInsns(cfg.Mode, iset.TypeUser)103	}104	return insns[r.Intn(len(insns))]105}106func split(cfg *Config, text []byte) [][]byte {107	insnset := iset.Arches[cfg.Arch]108	text = append([]byte{}, text...)...

randInsn

Using AI Code Generation

1import (2func main() {3 node, err := nodes.New("test", "test", "test", "test")4 if err != nil {5 log.Fatal(err)6 }

randInsn

Using AI Code Generation

1import (2func main() {3	var (4		corpusDir = flag.String("corpus", "", "corpus directory")5		outputDir = flag.String("output", "", "output directory")6		numFiles = flag.Int("num", 1, "number of output files")7		numCalls = flag.Int("calls", 1, "number of function calls")8		numIter = flag.Int("iter", 1, "number of iterations")9		numGoroutines = flag.Int("goroutines", 1, "number of goroutines")10		numIterPerGoroutine = flag.Int("iterPerGoroutine", 1, "number of iterations per goroutine")11		numCallsPerGoroutine = flag.Int("callsPerGoroutine", 1, "number of function calls per goroutine")12		numCallsPerIter = flag.Int("callsPerIter", 1, "number of function calls per iteration")13		numCallsPerIterPerGoroutine = flag.Int("callsPerIterPerGoroutine", 1, "number of function calls per iteration per goroutine")14		numCallsPerIterPerGoroutinePerFile = flag.Int("callsPerIterPerGoroutinePerFile", 1, "number of function calls per iteration per goroutine per file")15		numCallsPerIterPerGoroutinePerFilePerFunction = flag.Int("callsPerIterPerGoroutinePerFilePerFunction", 1, "number of

randInsn

Using AI Code Generation

1import (2func main() {3	rand.Seed(time.Now().UnixNano())4	ifuzz := ifuzz.IFuzz{}5	fmt.Println(ifuzz.RandInsn())6}7import (8func main() {9	rand.Seed(time.Now().UnixNano())10	ifuzz := ifuzz.IFuzz{}11	fmt.Println(ifuzz.RandReg())12}13import (14func main() {15	rand.Seed(time.Now().UnixNano())16	ifuzz := ifuzz.IFuzz{}17	fmt.Println(ifuzz.RandReg())18}19import (20func main() {21	rand.Seed(time.Now().UnixNano())22	ifuzz := ifuzz.IFuzz{}

randInsn

Using AI Code Generation

1import (2func main() {3	rand.Seed(time.Now().UnixNano())4	if termutil.Isatty(sdl.GetWindowFromID(1)) {5		fmt.Println("This program is not running in a terminal.")6	}7	ifuzz = ifuzz{}8	ifuzz.randInsn()9}

randInsn

Using AI Code Generation

1import (2type node struct {3}4type graph struct {5}6type edge struct {7}8type path struct {9}10type fuzz struct {11}12type program struct {13}14type fuzz struct {15}16type program struct {17}18type fuzz struct {19}20type program struct {21}22type fuzz struct {23}24type program struct {25}26type fuzz struct {27}28type program struct {29}30type fuzz struct {31}32type program struct {33}34type fuzz struct {

randInsn

Using AI Code Generation

1import (2func main() {3	ifuzz := ifuzz.NewIfuzz()4	ifuzz.SetArch(ifuzz.X86)5	ifuzz.SetMode(ifuzz.Mode32)6	ifuzz.SetInsns(10)7	ifuzz.SetBytes(10)8	insns := ifuzz.RandInsns()9	fmt.Println(insns)

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