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How to use Default method of prog Package

Best Syzkaller code snippet using prog.Default

proggen.go

Source:proggen.go

...132}133func (ctx *context) genArg(syzType prog.Type, dir prog.Dir, traceArg parser.IrType) prog.Arg {134	if traceArg == nil {135		log.Logf(3, "parsing syzType: %s, traceArg is nil. generating default arg...", syzType.Name())136		return syzType.DefaultArg(dir)137	}138	log.Logf(3, "parsing arg of syz type: %s, ir type: %#v", syzType.Name(), traceArg)139	if dir == prog.DirOut {140		switch syzType.(type) {141		case *prog.PtrType, *prog.StructType, *prog.ResourceType, *prog.BufferType:142			// Resource Types need special care. Pointers, Structs can have resource fields e.g. pipe, socketpair143			// Buffer may need special care in out direction144		default:145			return syzType.DefaultArg(dir)146		}147	}148	switch a := syzType.(type) {149	case *prog.IntType, *prog.ConstType, *prog.FlagsType, *prog.CsumType:150		return ctx.genConst(a, dir, traceArg)151	case *prog.LenType:152		return syzType.DefaultArg(dir)153	case *prog.ProcType:154		return ctx.parseProc(a, dir, traceArg)155	case *prog.ResourceType:156		return ctx.genResource(a, dir, traceArg)157	case *prog.PtrType:158		return ctx.genPtr(a, dir, traceArg)159	case *prog.BufferType:160		return ctx.genBuffer(a, dir, traceArg)161	case *prog.StructType:162		return ctx.genStruct(a, dir, traceArg)163	case *prog.ArrayType:164		return ctx.genArray(a, dir, traceArg)165	case *prog.UnionType:166		return ctx.genUnionArg(a, dir, traceArg)167	case *prog.VmaType:168		return ctx.genVma(a, dir, traceArg)169	default:170		log.Fatalf("unsupported type: %#v", syzType)171	}172	return nil173}174func (ctx *context) genVma(syzType *prog.VmaType, dir prog.Dir, _ parser.IrType) prog.Arg {175	npages := uint64(1)176	if syzType.RangeBegin != 0 || syzType.RangeEnd != 0 {177		npages = syzType.RangeEnd178	}179	return prog.MakeVmaPointerArg(syzType, dir, ctx.builder.AllocateVMA(npages), npages)180}181func (ctx *context) genArray(syzType *prog.ArrayType, dir prog.Dir, traceType parser.IrType) prog.Arg {182	var args []prog.Arg183	switch a := traceType.(type) {184	case *parser.GroupType:185		for i := 0; i < len(a.Elems); i++ {186			args = append(args, ctx.genArg(syzType.Elem, dir, a.Elems[i]))187		}188	default:189		log.Fatalf("unsupported type for array: %#v", traceType)190	}191	return prog.MakeGroupArg(syzType, dir, args)192}193func (ctx *context) genStruct(syzType *prog.StructType, dir prog.Dir, traceType parser.IrType) prog.Arg {194	var args []prog.Arg195	switch a := traceType.(type) {196	case *parser.GroupType:197		j := 0198		if ret, recursed := ctx.recurseStructs(syzType, dir, a); recursed {199			return ret200		}201		for i := range syzType.Fields {202			if prog.IsPad(syzType.Fields[i].Type) {203				args = append(args, syzType.Fields[i].DefaultArg(dir))204				continue205			}206			// If the last n fields of a struct are zero or NULL, strace will occasionally omit those values207			// this creates a mismatch in the number of elements in the ir type and in208			// our descriptions. We generate default values for omitted fields209			if j >= len(a.Elems) {210				args = append(args, syzType.Fields[i].DefaultArg(dir))211			} else {212				args = append(args, ctx.genArg(syzType.Fields[i].Type, dir, a.Elems[j]))213			}214			j++215		}216	case *parser.BufferType:217		// We could have a case like the following:218		// ioctl(3, 35111, {ifr_name="\x6c\x6f", ifr_hwaddr=00:00:00:00:00:00}) = 0219		// if_hwaddr gets parsed as a BufferType but our syscall descriptions have it as a struct type220		return syzType.DefaultArg(dir)221	default:222		log.Fatalf("unsupported type for struct: %#v", a)223	}224	return prog.MakeGroupArg(syzType, dir, args)225}226// recurseStructs handles cases where syzType corresponds to struct descriptions like227// sockaddr_storage_in6 {228//        addr    sockaddr_in6229// } [size[SOCKADDR_STORAGE_SIZE], align_ptr]230// which need to be recursively generated. It returns true if we needed to recurse231// along with the generated argument and false otherwise.232func (ctx *context) recurseStructs(syzType *prog.StructType, dir prog.Dir, traceType *parser.GroupType) (prog.Arg, bool) {233	// only consider structs with one non-padded field234	numFields := 0235	for _, field := range syzType.Fields {236		if prog.IsPad(field.Type) {237			continue238		}239		numFields++240	}241	if numFields != 1 {242		return nil, false243	}244	// the strace group type needs to have more one field (a mismatch)245	if len(traceType.Elems) == 1 {246		return nil, false247	}248	// first field needs to be a struct249	switch t := syzType.Fields[0].Type.(type) {250	case *prog.StructType:251		var args []prog.Arg252		// first element and traceType should have the same number of elements253		if len(t.Fields) != len(traceType.Elems) {254			return nil, false255		}256		args = append(args, ctx.genStruct(t, dir, traceType))257		for _, field := range syzType.Fields[1:] {258			args = append(args, field.DefaultArg(dir))259		}260		return prog.MakeGroupArg(syzType, dir, args), true261	}262	return nil, false263}264func (ctx *context) genUnionArg(syzType *prog.UnionType, dir prog.Dir, straceType parser.IrType) prog.Arg {265	if straceType == nil {266		log.Logf(1, "generating union arg. straceType is nil")267		return syzType.DefaultArg(dir)268	}269	log.Logf(4, "generating union arg: %s %#v", syzType.TypeName, straceType)270	// Unions are super annoying because they sometimes need to be handled case by case271	// We might need to lookinto a matching algorithm to identify the union type that most closely272	// matches our strace type.273	switch syzType.TypeName {274	case "sockaddr_storage":275		return ctx.genSockaddrStorage(syzType, dir, straceType)276	case "sockaddr_nl":277		return ctx.genSockaddrNetlink(syzType, dir, straceType)278	case "ifr_ifru":279		return ctx.genIfrIfru(syzType, dir, straceType)280	}281	return prog.MakeUnionArg(syzType, dir, ctx.genArg(syzType.Fields[0].Type, dir, straceType), 0)282}283func (ctx *context) genBuffer(syzType *prog.BufferType, dir prog.Dir, traceType parser.IrType) prog.Arg {284	if dir == prog.DirOut {285		if !syzType.Varlen() {286			return prog.MakeOutDataArg(syzType, dir, syzType.Size())287		}288		switch a := traceType.(type) {289		case *parser.BufferType:290			return prog.MakeOutDataArg(syzType, dir, uint64(len(a.Val)))291		default:292			switch syzType.Kind {293			case prog.BufferBlobRand:294				size := rand.Intn(256)295				return prog.MakeOutDataArg(syzType, dir, uint64(size))296			case prog.BufferBlobRange:297				max := rand.Intn(int(syzType.RangeEnd) - int(syzType.RangeBegin) + 1)298				size := max + int(syzType.RangeBegin)299				return prog.MakeOutDataArg(syzType, dir, uint64(size))300			default:301				log.Fatalf("unexpected buffer type kind: %v. call %v arg %#v", syzType.Kind, ctx.currentSyzCall, traceType)302			}303		}304	}305	var bufVal []byte306	switch a := traceType.(type) {307	case *parser.BufferType:308		bufVal = []byte(a.Val)309	case parser.Constant:310		val := a.Val()311		bArr := make([]byte, 8)312		binary.LittleEndian.PutUint64(bArr, val)313		bufVal = bArr314	default:315		log.Fatalf("unsupported type for buffer: %#v", traceType)316	}317	// strace always drops the null byte for buffer types but we only need to add it back for filenames and strings318	switch syzType.Kind {319	case prog.BufferFilename, prog.BufferString:320		bufVal = append(bufVal, '\x00')321	}322	if !syzType.Varlen() {323		size := syzType.Size()324		for uint64(len(bufVal)) < size {325			bufVal = append(bufVal, 0)326		}327		bufVal = bufVal[:size]328	}329	return prog.MakeDataArg(syzType, dir, bufVal)330}331func (ctx *context) genPtr(syzType *prog.PtrType, dir prog.Dir, traceType parser.IrType) prog.Arg {332	switch a := traceType.(type) {333	case parser.Constant:334		if a.Val() == 0 {335			return prog.MakeSpecialPointerArg(syzType, dir, 0)336		}337		// Likely have a type of the form bind(3, 0xfffffffff, [3]);338		res := syzType.Elem.DefaultArg(syzType.ElemDir)339		return ctx.addr(syzType, dir, res.Size(), res)340	default:341		res := ctx.genArg(syzType.Elem, syzType.ElemDir, a)342		return ctx.addr(syzType, dir, res.Size(), res)343	}344}345func (ctx *context) genConst(syzType prog.Type, dir prog.Dir, traceType parser.IrType) prog.Arg {346	switch a := traceType.(type) {347	case parser.Constant:348		return prog.MakeConstArg(syzType, dir, a.Val())349	case *parser.GroupType:350		// Sometimes strace represents a pointer to int as [0] which gets parsed351		// as Array([0], len=1). A good example is ioctl(3, FIONBIO, [1]). We may also have an union int type that352		// is a represented as a struct in strace e.g.353		// sigev_value={sival_int=-2123636944, sival_ptr=0x7ffd816bdf30}354		// For now we choose the first option355		if len(a.Elems) == 0 {356			log.Logf(2, "parsing const type, got array type with len 0")357			return syzType.DefaultArg(dir)358		}359		return ctx.genConst(syzType, dir, a.Elems[0])360	case *parser.BufferType:361		// strace decodes some arguments as hex strings because those values are network ordered362		// e.g. sin_port or sin_addr fields of sockaddr_in.363		// network order is big endian byte order so if the len of byte array is 1, 2, 4, or 8 then364		// it is a good chance that we are decoding one of those fields. If it isn't, then most likely365		// we have an error i.e. a sockaddr_un struct passed to a connect call with an inet file descriptor366		var val uint64367		toUint64 := binary.LittleEndian.Uint64368		toUint32 := binary.LittleEndian.Uint32369		toUint16 := binary.LittleEndian.Uint16370		if syzType.Format() == prog.FormatBigEndian {371			toUint64 = binary.BigEndian.Uint64372			toUint32 = binary.BigEndian.Uint32373			toUint16 = binary.BigEndian.Uint16374		}375		switch len(a.Val) {376		case 8:377			val = toUint64([]byte(a.Val))378		case 4:379			val = uint64(toUint32([]byte(a.Val)))380		case 2:381			val = uint64(toUint16([]byte(a.Val)))382		case 1:383			val = uint64(a.Val[0])384		default:385			return syzType.DefaultArg(dir)386		}387		return prog.MakeConstArg(syzType, dir, val)388	default:389		log.Fatalf("unsupported type for const: %#v", traceType)390	}391	return nil392}393func (ctx *context) genResource(syzType *prog.ResourceType, dir prog.Dir, traceType parser.IrType) prog.Arg {394	if dir == prog.DirOut {395		log.Logf(2, "resource returned by call argument: %s", traceType.String())396		res := prog.MakeResultArg(syzType, dir, nil, syzType.Default())397		ctx.returnCache.cache(syzType, traceType, res)398		return res399	}400	switch a := traceType.(type) {401	case parser.Constant:402		val := a.Val()403		if arg := ctx.returnCache.get(syzType, traceType); arg != nil {404			res := prog.MakeResultArg(syzType, dir, arg.(*prog.ResultArg), syzType.Default())405			return res406		}407		res := prog.MakeResultArg(syzType, dir, nil, val)408		return res409	case *parser.GroupType:410		if len(a.Elems) == 1 {411			// For example: 5028  ioctl(3, SIOCSPGRP, [0])          = 0412			// last argument is a pointer to a resource. Strace will output a pointer to413			// a number x as [x].414			res := prog.MakeResultArg(syzType, dir, nil, syzType.Default())415			ctx.returnCache.cache(syzType, a.Elems[0], res)416			return res417		}418		log.Fatalf("generating resource type from GroupType with %d elements", len(a.Elems))419	default:420		log.Fatalf("unsupported type for resource: %#v", traceType)421	}422	return nil423}424func (ctx *context) parseProc(syzType *prog.ProcType, dir prog.Dir, traceType parser.IrType) prog.Arg {425	switch a := traceType.(type) {426	case parser.Constant:427		val := a.Val()428		if val >= syzType.ValuesPerProc {429			return prog.MakeConstArg(syzType, dir, syzType.ValuesPerProc-1)430		}431		return prog.MakeConstArg(syzType, dir, val)432	case *parser.BufferType:433		// Again probably an error case434		// Something like the following will trigger this435		// bind(3, {sa_family=AF_INET, sa_data="\xac"}, 3) = -1 EINVAL(Invalid argument)436		return syzType.DefaultArg(dir)437	default:438		log.Fatalf("unsupported type for proc: %#v", traceType)439	}440	return nil441}442func (ctx *context) addr(syzType prog.Type, dir prog.Dir, size uint64, data prog.Arg) prog.Arg {443	return prog.MakePointerArg(syzType, dir, ctx.builder.Allocate(size), data)444}445func shouldSkip(c *parser.Syscall) bool {446	switch c.CallName {447	case "write":448		// We skip all writes to stdout and stderr because they can corrupt our crash summary.449		// Also there will be nothing on stdin, so any reads will hang.450		switch a := c.Args[0].(type) {...

Default

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Println(prog.Default())4}5import "fmt"6func main() {7    fmt.Println(prog.Default())8}9import "fmt"10func main() {11    fmt.Println(prog.Default())12}13import "fmt"14func main() {15    fmt.Println(prog.Default())16}17import "fmt"18func main() {19    fmt.Println(prog.Default())20}21import "fmt"22func main() {23    fmt.Println(prog.Default())24}25import "fmt"26func main() {27    fmt.Println(prog.Default())28}29import "fmt"30func main() {31    fmt.Println(prog.Default())32}33import "fmt"34func main() {35    fmt.Println(prog.Default())36}37import "fmt"38func main() {39    fmt.Println(prog.Default())40}41import "fmt"42func main() {43    fmt.Println(prog.Default())44}45import "fmt"46func main() {47    fmt.Println(prog.Default())48}49import "fmt"50func main() {51    fmt.Println(prog.Default())52}53import "fmt"54func main() {55    fmt.Println(prog.Default())56}57import "fmt"

Default

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Println(prog.Default())4}5import "fmt"6func Default() string {7}8import "fmt"9func main() {10    fmt.Println(prog.Default())11}12import "fmt"13func Default() string {14}15import "fmt"16func main() {17    fmt.Println(prog.Default())18}19import "fmt"20func Default() string {21}22import "fmt"23func main() {24    fmt.Println(prog.Default())25}26import "fmt"27func Default() string {28}29import "fmt"30func main() {31    fmt.Println(prog.Default())32}33import "fmt"34func Default() string {35}36import "fmt"37func main() {38    fmt.Println(prog.Default())39}40import "fmt"41func Default() string {42}43import "fmt"44func main() {45    fmt.Println(prog.Default())46}47import "fmt"48func Default() string {49}50import

Default

Using AI Code Generation

1import (2func main() {3	fmt.Println(prog.Default())4}5func Default() string {6}7func Default() string {8}9func Default() string {10}11func Default() string {12}

Default

Using AI Code Generation

1import (2func main() {3	fmt.Println("Default Method of prog class")4	fmt.Println(prog.Default())5}6import (7func main() {8	fmt.Println("Exported Method of prog class")9	fmt.Println(prog.Exported())10}11import (12func main() {13	fmt.Println("Unexported Method of prog class")14	fmt.Println(prog.unexported())15}16import (17func main() {18	fmt.Println("Exported Method of prog class")19	fmt.Println(prog.Exported())20}21import (22func main() {23	fmt.Println("Unexported Method of prog class")24	fmt.Println(prog.unexported())25}26import (27func main() {28	fmt.Println("Exported Method of prog class")29	fmt.Println(prog.Exported())30}31import (32func main() {33	fmt.Println("Unexported Method of prog class")34	fmt.Println(prog.unexported())35}36import (37func main() {38	fmt.Println("Exported Method of prog class")

Default

Using AI Code Generation

1import (2func main() {3    fmt.Println("Default method of Prog class:", prog.Default())4}5import (6func main() {7    fmt.Println("Public method of Prog class:", prog.Public())8}9import (10func main() {11    fmt.Println("Private method of Prog class:", prog.Private())12}13import (14func main() {15    fmt.Println("Private method of Prog class:", prog.private())16}17import (18func main() {19    fmt.Println("Private method of Prog class:", prog.private())20}21import (22func main() {23    fmt.Println("Private method of Prog class:", prog.private())24}

Default

Using AI Code Generation

1import "fmt"2func main() {3    prog.Default()4}5import "fmt"6func main() {7    prog.Prog()8}9import "fmt"10func main() {11    prog.Default()12}13func (p prog) Default() {14    fmt.Println("This is overridden default method")15}16prog.Default undefined (type prog has no field or method Default)17import "fmt"18func main() {19    prog.Default()20}21func (p prog) Default() {22    fmt.Println("This is overridden default method")23}24prog.Default undefined (type prog has no field or method Default)25import "fmt"26func main() {27    prog.Default()28}29func (p prog) Default() {30    fmt.Println("This is overridden default method")31}32prog.Default undefined (type prog has no field or method Default)33import "fmt"34func main() {35    prog.Default()36}37func (p prog) Default() {38    fmt.Println("This is overridden default method")39}40prog.Default undefined (type prog has no field or method Default)41import "fmt"42func main() {43    prog.Default()44}45func (p prog) Default() {

Default

Using AI Code Generation

1import (2func main() {3	fmt.Println(filepath.Default())4}5import (6func main() {7	fmt.Println(filepath.Ext("/home/akshay/Downloads/1.go"))8}9import (10func main() {11	fmt.Println(filepath.VolumeName("/home/akshay/Downloads/1.go"))12}13import (14func main() {

Default

Using AI Code Generation

1import "fmt"2import "prog"3func main() {4    fmt.Println(prog.Default())5}6A package can be imported using the import keyword. The import keyword is used to import a package by its name. We can import a package by its name in Go source files. For example, we can import the prog package in 3.go by using the following code:7import "fmt"8import "prog"9func main() {10    fmt.Println(prog.Default())11}

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