How to use Generate method of ifuzz Package

Best Syzkaller code snippet using ifuzz.Generate

rand.go

Source:rand.go

...163	if r.oneOf(100) {164		return specialFiles[r.Intn(len(specialFiles))]165	}166	if len(s.files) == 0 || r.oneOf(10) {167		// Generate a new name.168		dir := "."169		if r.oneOf(2) && len(s.files) != 0 {170			dir = r.randFromMap(s.files)171			if len(dir) > 0 && dir[len(dir)-1] == 0 {172				dir = dir[:len(dir)-1]173			}174			if r.oneOf(10) && filepath.Clean(dir)[0] != '.' {175				dir += "/.."176			}177		}178		for i := 0; ; i++ {179			f := fmt.Sprintf("%v/file%v", dir, i)180			if !s.files[f] {181				return f182			}183		}184	}185	return r.randFromMap(s.files)186}187func (r *randGen) randFromMap(m map[string]bool) string {188	files := make([]string, 0, len(m))189	for f := range m {190		files = append(files, f)191	}192	sort.Strings(files)193	return files[r.Intn(len(files))]194}195func (r *randGen) randString(s *state, t *BufferType) []byte {196	if len(t.Values) != 0 {197		return []byte(t.Values[r.Intn(len(t.Values))])198	}199	if len(s.strings) != 0 && r.bin() {200		// Return an existing string.201		// TODO(dvyukov): make s.strings indexed by string SubKind.202		return []byte(r.randFromMap(s.strings))203	}204	punct := []byte{'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '-', '+', '\\',205		'/', ':', '.', ',', '-', '\'', '[', ']', '{', '}'}206	buf := new(bytes.Buffer)207	for r.nOutOf(3, 4) {208		switch {209		case r.nOutOf(10, 21):210			dict := r.target.StringDictionary211			if len(dict) != 0 {212				buf.WriteString(dict[r.Intn(len(dict))])213			}214		case r.nOutOf(10, 11):215			buf.Write([]byte{punct[r.Intn(len(punct))]})216		default:217			buf.Write([]byte{byte(r.Intn(256))})218		}219	}220	if r.oneOf(100) == t.NoZ {221		buf.Write([]byte{0})222	}223	return buf.Bytes()224}225func (r *randGen) allocAddr(s *state, typ Type, size uint64, data Arg) *PointerArg {226	return MakePointerArg(typ, s.ma.alloc(r, size), data)227}228func (r *randGen) allocVMA(s *state, typ Type, numPages uint64) *PointerArg {229	page := s.va.alloc(r, numPages)230	return MakeVmaPointerArg(typ, page*r.target.PageSize, numPages*r.target.PageSize)231}232func (r *randGen) createResource(s *state, res *ResourceType) (arg Arg, calls []*Call) {233	if r.inCreateResource {234		special := res.SpecialValues()235		return MakeResultArg(res, nil, special[r.Intn(len(special))]), nil236	}237	r.inCreateResource = true238	defer func() { r.inCreateResource = false }()239	kind := res.Desc.Name240	// We may have no resources, but still be in createResource due to ANYRES.241	if len(r.target.resourceMap) != 0 && r.oneOf(1000) {242		// Spoof resource subkind.243		var all []string244		for kind1 := range r.target.resourceMap {245			if r.target.isCompatibleResource(res.Desc.Kind[0], kind1) {246				all = append(all, kind1)247			}248		}249		if len(all) == 0 {250			panic(fmt.Sprintf("got no spoof resources for %v in %v/%v",251				kind, r.target.OS, r.target.Arch))252		}253		sort.Strings(all)254		kind = all[r.Intn(len(all))]255	}256	// Find calls that produce the necessary resources.257	metas0 := r.target.resourceCtors[kind]258	// TODO: reduce priority of less specialized ctors.259	var metas []*Syscall260	for _, meta := range metas0 {261		if s.ct == nil || s.ct.run[meta.ID] == nil {262			continue263		}264		metas = append(metas, meta)265	}266	if len(metas) == 0 {267		return res.DefaultArg(), nil268	}269	// Now we have a set of candidate calls that can create the necessary resource.270	for i := 0; i < 1e3; i++ {271		// Generate one of them.272		meta := metas[r.Intn(len(metas))]273		calls := r.generateParticularCall(s, meta)274		s1 := newState(r.target, s.ct)275		s1.analyze(calls[len(calls)-1])276		// Now see if we have what we want.277		var allres []*ResultArg278		for kind1, res1 := range s1.resources {279			if r.target.isCompatibleResource(kind, kind1) {280				allres = append(allres, res1...)281			}282		}283		if len(allres) != 0 {284			// Bingo!285			arg := MakeResultArg(res, allres[r.Intn(len(allres))], 0)286			return arg, calls287		}288		// Discard unsuccessful calls.289		// Note: s.ma/va have already noted allocations of the new objects290		// in discarded syscalls, ideally we should recreate state291		// by analyzing the program again.292		for _, c := range calls {293			ForeachArg(c, func(arg Arg, _ *ArgCtx) {294				if a, ok := arg.(*ResultArg); ok && a.Res != nil {295					delete(a.Res.uses, a)296				}297			})298		}299	}300	// Generally we can loop several times, e.g. when we choose a call that returns301	// the resource in an array, but then generateArg generated that array of zero length.302	// But we must succeed eventually.303	var ctors []string304	for _, meta := range metas {305		ctors = append(ctors, meta.Name)306	}307	panic(fmt.Sprintf("failed to create a resource %v with %v",308		res.Desc.Kind[0], strings.Join(ctors, ", ")))309}310func (r *randGen) generateText(kind TextKind) []byte {311	switch kind {312	case TextTarget:313		if r.target.Arch == "amd64" || r.target.Arch == "386" {314			cfg := createTargetIfuzzConfig(r.target)315			return ifuzz.Generate(cfg, r.Rand)316		}317		fallthrough318	case TextArm64:319		// Just a stub, need something better.320		text := make([]byte, 50)321		for i := range text {322			text[i] = byte(r.Intn(256))323		}324		return text325	default:326		cfg := createIfuzzConfig(kind)327		return ifuzz.Generate(cfg, r.Rand)328	}329}330func (r *randGen) mutateText(kind TextKind, text []byte) []byte {331	switch kind {332	case TextTarget:333		if r.target.Arch == "amd64" || r.target.Arch == "386" {334			cfg := createTargetIfuzzConfig(r.target)335			return ifuzz.Mutate(cfg, r.Rand, text)336		}337		fallthrough338	case TextArm64:339		return mutateData(r, text, 40, 60)340	default:341		cfg := createIfuzzConfig(kind)342		return ifuzz.Mutate(cfg, r.Rand, text)343	}344}345func createTargetIfuzzConfig(target *Target) *ifuzz.Config {346	cfg := &ifuzz.Config{347		Len:  10,348		Priv: false,349		Exec: true,350		MemRegions: []ifuzz.MemRegion{351			{Start: target.DataOffset, Size: target.NumPages * target.PageSize},352		},353	}354	for _, p := range target.SpecialPointers {355		cfg.MemRegions = append(cfg.MemRegions, ifuzz.MemRegion{356			Start: p & ^target.PageSize, Size: p & ^target.PageSize + target.PageSize,357		})358	}359	switch target.Arch {360	case "amd64":361		cfg.Mode = ifuzz.ModeLong64362	case "386":363		cfg.Mode = ifuzz.ModeProt32364	default:365		panic("unknown text kind")366	}367	return cfg368}369func createIfuzzConfig(kind TextKind) *ifuzz.Config {370	cfg := &ifuzz.Config{371		Len:  10,372		Priv: true,373		Exec: true,374		MemRegions: []ifuzz.MemRegion{375			{Start: 0 << 12, Size: 1 << 12},376			{Start: 1 << 12, Size: 1 << 12},377			{Start: 2 << 12, Size: 1 << 12},378			{Start: 3 << 12, Size: 1 << 12},379			{Start: 4 << 12, Size: 1 << 12},380			{Start: 5 << 12, Size: 1 << 12},381			{Start: 6 << 12, Size: 1 << 12},382			{Start: 7 << 12, Size: 1 << 12},383			{Start: 8 << 12, Size: 1 << 12},384			{Start: 9 << 12, Size: 1 << 12},385			{Start: 0xfec00000, Size: 0x100}, // ioapic386		},387	}388	switch kind {389	case TextX86Real:390		cfg.Mode = ifuzz.ModeReal16391	case TextX86bit16:392		cfg.Mode = ifuzz.ModeProt16393	case TextX86bit32:394		cfg.Mode = ifuzz.ModeProt32395	case TextX86bit64:396		cfg.Mode = ifuzz.ModeLong64397	default:398		panic("unknown text kind")399	}400	return cfg401}402// nOutOf returns true n out of outOf times.403func (r *randGen) nOutOf(n, outOf int) bool {404	if n <= 0 || n >= outOf {405		panic("bad probability")406	}407	v := r.Intn(outOf)408	return v < n409}410func (r *randGen) generateCall(s *state, p *Prog) []*Call {411	idx := 0412	if s.ct == nil {413		idx = r.Intn(len(r.target.Syscalls))414	} else {415		call := -1416		if len(p.Calls) != 0 {417			call = p.Calls[r.Intn(len(p.Calls))].Meta.ID418		}419		idx = s.ct.Choose(r.Rand, call)420	}421	meta := r.target.Syscalls[idx]422	return r.generateParticularCall(s, meta)423}424func (r *randGen) generateParticularCall(s *state, meta *Syscall) (calls []*Call) {425	c := &Call{426		Meta: meta,427		Ret:  MakeReturnArg(meta.Ret),428	}429	c.Args, calls = r.generateArgs(s, meta.Args)430	r.target.assignSizesCall(c)431	calls = append(calls, c)432	for _, c1 := range calls {433		r.target.SanitizeCall(c1)434	}435	return calls436}437// GenerateAllSyzProg generates a program that contains all pseudo syz_ calls for testing.438func (target *Target) GenerateAllSyzProg(rs rand.Source) *Prog {439	p := &Prog{440		Target: target,441	}442	r := newRand(target, rs)443	s := newState(target, nil)444	handled := make(map[string]bool)445	for _, meta := range target.Syscalls {446		if !strings.HasPrefix(meta.CallName, "syz_") || handled[meta.CallName] {447			continue448		}449		handled[meta.CallName] = true450		calls := r.generateParticularCall(s, meta)451		for _, c := range calls {452			s.analyze(c)453			p.Calls = append(p.Calls, c)454		}455	}456	if err := p.validate(); err != nil {457		panic(err)458	}459	return p460}461// GenerateSimpleProg generates the simplest non-empty program for testing462// (e.g. containing a single mmap).463func (target *Target) GenerateSimpleProg() *Prog {464	return &Prog{465		Target: target,466		Calls:  []*Call{target.MakeMmap(0, target.PageSize)},467	}468}469func (target *Target) GenerateUberMmapProg() *Prog {470	return &Prog{471		Target: target,472		Calls:  []*Call{target.MakeMmap(0, target.NumPages*target.PageSize)},473	}474}475func (r *randGen) generateArgs(s *state, types []Type) ([]Arg, []*Call) {476	var calls []*Call477	args := make([]Arg, len(types))478	// Generate all args. Size args have the default value 0 for now.479	for i, typ := range types {480		arg, calls1 := r.generateArg(s, typ)481		if arg == nil {482			panic(fmt.Sprintf("generated arg is nil for type '%v', types: %+v", typ.Name(), types))483		}484		args[i] = arg485		calls = append(calls, calls1...)486	}487	return args, calls488}489func (r *randGen) generateArg(s *state, typ Type) (arg Arg, calls []*Call) {490	return r.generateArgImpl(s, typ, false)491}492func (r *randGen) generateArgImpl(s *state, typ Type, ignoreSpecial bool) (arg Arg, calls []*Call) {...

Generate

Using AI Code Generation

1import (2func main() {3	i.Generate()4	fmt.Println(i)5}6import (7func main() {8	i.Generate()9	fmt.Println(i)10}11import (12func main() {13	i.Generate()14	fmt.Println(i)15}16import (17func main() {18	i.Generate()19	fmt.Println(i)20}21import (22func main() {23	i.Generate()24	fmt.Println(i)25}26import (27func main() {28	i.Generate()29	fmt.Println(i)30}31import (32func main() {33	i.Generate()34	fmt.Println(i)35}36import (37func main() {38	i.Generate()39	fmt.Println(i)40}41import (42func main() {43	i.Generate()44	fmt.Println(i)45}46import (47func main() {48	i.Generate()

Generate

Using AI Code Generation

1import (2func main() {3	vm := otto.New()4	vm.Run(`5		var ifuzz = require("ifuzz");6		var f = ifuzz.Generate();7	value, _ := vm.Get("f")8	fmt.Println(value)9}10import (11func main() {12	vm := otto.New()13	vm.Run(`14		var ifuzz = require("ifuzz");15		var f = ifuzz.Generate();16	value, _ := vm.Get("f")17	fmt.Println(value)18}19import (20func main() {21	vm := otto.New()22	vm.Run(`23		var ifuzz = require("ifuzz");24		var f = ifuzz.Generate();25	value, _ := vm.Get("f")26	fmt.Println(value)27}28import (29func main() {30	vm := otto.New()31	vm.Run(`32		var ifuzz = require("ifuzz");33		var f = ifuzz.Generate();34	value, _ := vm.Get("f")35	fmt.Println(value)36}37import (38func main() {39	vm := otto.New()40	vm.Run(`41		var ifuzz = require("ifuzz");42		var f = ifuzz.Generate();43	value, _ := vm.Get("f")44	fmt.Println(value)45}46import (47func main() {48	vm := otto.New()49	vm.Run(`50		var ifuzz = require("ifuzz");51		var f = ifuzz.Generate();52	value, _ := vm.Get("f")53	fmt.Println(value)54}

Generate

Using AI Code Generation

1import (2func main() {3	rand.Seed(time.Now().UnixNano())4	fmt.Println("Enter the number of inputs to be generated")5	fmt.Scan(&i)6	fmt.Println("Enter the type of the input 1-Integer 2-Float 3-String")7	fmt.Scan(&t)8	fmt.Println("Enter the range of the input")9	fmt.Scan(&x)10	fmt.Scan(&y)11	if t == 1 {12		I = Integer(x, y)13	} else if t == 2 {14		I = Float(x, y)15	} else if t == 3 {16		I = String(x, y)17	}18	for i > 0 {19		fmt.Println(I.Generate())20	}21}22import (23func main() {24	rand.Seed(time.Now().UnixNano())25	fmt.Println("Enter the number of inputs to be generated")26	fmt.Scan(&i)27	fmt.Println("Enter the type of the input 1-Integer 2-Float 3-String")28	fmt.Scan(&t)29	fmt.Println("Enter the range of the input")30	fmt.Scan(&x)31	fmt.Scan(&y)32	if t == 1 {33		I = Integer(x, y)34	} else if t == 2 {35		I = Float(x, y)36	} else if t == 3 {37		I = String(x, y)38	}39	for i > 0 {40		fmt.Println(I.Generate())41	}42}43import (44func main() {45	rand.Seed(time.Now().UnixNano())46	fmt.Println("Enter the number of inputs to be generated")47	fmt.Scan(&i)48	fmt.Println("Enter the type of the input 1-Integer 2-Float 3-String")49	fmt.Scan(&t)50	fmt.Println("Enter the range of the input")

Generate

Using AI Code Generation

1import (2func main() {3    fuzzer := ifuzz.New()4    fuzzer.Generate(data, 1024)5    fmt.Println(data)6}7import (8func main() {9    fuzzer := ifuzz.New()10    fuzzer.Generate(data, 1024)11    fmt.Println(data)12}13import (14func main() {15    fuzzer := ifuzz.New()16    fuzzer.Generate(data, 1024)17    fmt.Println(data)18}19import (20func main() {21    fuzzer := ifuzz.New()22    fuzzer.Generate(data, 1024)23    fmt.Println(data)24}25import (26func main() {27    fuzzer := ifuzz.New()28    fuzzer.Generate(data, 1024)29    fmt.Println(data)30}31import (32func main() {33    fuzzer := ifuzz.New()34    fuzzer.Generate(data, 1024)35    fmt.Println(data)36}37import (38func main() {39    fuzzer := ifuzz.New()40    fuzzer.Generate(data, 1024)41    fmt.Println(data

Generate

Using AI Code Generation

1import (2func main() {3	fuzz := ifuzz.NewFuzz()4	fmt.Println(fuzz.Generate(10))5}6import (7func main() {8	fuzz := ifuzz.NewFuzz()9	fmt.Println(fuzz.Generate(10))10}11import (12func main() {13	fuzz := ifuzz.NewFuzz()14	fmt.Println(fuzz.Generate(10))15}16import (17func main() {18	fuzz := ifuzz.NewFuzz()19	fmt.Println(fuzz.Generate(10))20}21import (22func main() {23	fuzz := ifuzz.NewFuzz()24	fmt.Println(fuzz.Generate(10))25}

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