How to use genConst method of proggen Package

Best Syzkaller code snippet using proggen.genConst

proggen.go

Source:proggen.go

...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			fldDir := syzType.Fields[i].Dir(dir)203			if prog.IsPad(syzType.Fields[i].Type) {204				args = append(args, syzType.Fields[i].DefaultArg(fldDir))205				continue206			}207			// If the last n fields of a struct are zero or NULL, strace will occasionally omit those values208			// this creates a mismatch in the number of elements in the ir type and in209			// our descriptions. We generate default values for omitted fields210			if j >= len(a.Elems) {211				args = append(args, syzType.Fields[i].DefaultArg(fldDir))212			} else {213				args = append(args, ctx.genArg(syzType.Fields[i].Type, fldDir, a.Elems[j]))214			}215			j++216		}217	case *parser.BufferType:218		// We could have a case like the following:219		// ioctl(3, 35111, {ifr_name="\x6c\x6f", ifr_hwaddr=00:00:00:00:00:00}) = 0220		// if_hwaddr gets parsed as a BufferType but our syscall descriptions have it as a struct type221		return syzType.DefaultArg(dir)222	default:223		log.Fatalf("unsupported type for struct: %#v", a)224	}225	return prog.MakeGroupArg(syzType, dir, args)226}227// recurseStructs handles cases where syzType corresponds to struct descriptions like228// sockaddr_storage_in6 {229//        addr    sockaddr_in6230// } [size[SOCKADDR_STORAGE_SIZE], align_ptr]231// which need to be recursively generated. It returns true if we needed to recurse232// along with the generated argument and false otherwise.233func (ctx *context) recurseStructs(syzType *prog.StructType, dir prog.Dir, traceType *parser.GroupType) (prog.Arg, bool) {234	// only consider structs with one non-padded field235	numFields := 0236	for _, field := range syzType.Fields {237		if prog.IsPad(field.Type) {238			continue239		}240		numFields++241	}242	if numFields != 1 {243		return nil, false244	}245	// the strace group type needs to have more one field (a mismatch)246	if len(traceType.Elems) == 1 {247		return nil, false248	}249	// first field needs to be a struct250	switch t := syzType.Fields[0].Type.(type) {251	case *prog.StructType:252		var args []prog.Arg253		// first element and traceType should have the same number of elements254		if len(t.Fields) != len(traceType.Elems) {255			return nil, false256		}257		args = append(args, ctx.genStruct(t, dir, traceType))258		for _, field := range syzType.Fields[1:] {259			args = append(args, field.DefaultArg(field.Dir(dir)))260		}261		return prog.MakeGroupArg(syzType, dir, args), true262	}263	return nil, false264}265func (ctx *context) genUnionArg(syzType *prog.UnionType, dir prog.Dir, straceType parser.IrType) prog.Arg {266	if straceType == nil {267		log.Logf(1, "generating union arg. straceType is nil")268		return syzType.DefaultArg(dir)269	}270	log.Logf(4, "generating union arg: %s %#v", syzType.TypeName, straceType)271	// Unions are super annoying because they sometimes need to be handled case by case272	// We might need to lookinto a matching algorithm to identify the union type that most closely273	// matches our strace type.274	switch syzType.TypeName {275	case "sockaddr_storage":276		return ctx.genSockaddrStorage(syzType, dir, straceType)277	case "sockaddr_nl":278		return ctx.genSockaddrNetlink(syzType, dir, straceType)279	case "ifr_ifru":280		return ctx.genIfrIfru(syzType, dir, straceType)281	}282	return prog.MakeUnionArg(syzType, dir, ctx.genArg(syzType.Fields[0].Type, syzType.Fields[0].Dir(dir), straceType), 0)283}284func (ctx *context) genBuffer(syzType *prog.BufferType, dir prog.Dir, traceType parser.IrType) prog.Arg {285	if dir == prog.DirOut {286		if !syzType.Varlen() {287			return prog.MakeOutDataArg(syzType, dir, syzType.Size())288		}289		switch a := traceType.(type) {290		case *parser.BufferType:291			return prog.MakeOutDataArg(syzType, dir, uint64(len(a.Val)))292		default:293			switch syzType.Kind {294			case prog.BufferBlobRand:295				size := rand.Intn(256)296				return prog.MakeOutDataArg(syzType, dir, uint64(size))297			case prog.BufferBlobRange:298				max := rand.Intn(int(syzType.RangeEnd) - int(syzType.RangeBegin) + 1)299				size := max + int(syzType.RangeBegin)300				return prog.MakeOutDataArg(syzType, dir, uint64(size))301			default:302				log.Fatalf("unexpected buffer type kind: %v. call %v arg %#v", syzType.Kind, ctx.currentSyzCall, traceType)303			}304		}305	}306	var bufVal []byte307	switch a := traceType.(type) {308	case *parser.BufferType:309		bufVal = []byte(a.Val)310	case parser.Constant:311		val := a.Val()312		bArr := make([]byte, 8)313		binary.LittleEndian.PutUint64(bArr, val)314		bufVal = bArr315	default:316		log.Fatalf("unsupported type for buffer: %#v", traceType)317	}318	// strace always drops the null byte for buffer types but we only need to add it back for filenames and strings319	switch syzType.Kind {320	case prog.BufferFilename, prog.BufferString:321		bufVal = append(bufVal, '\x00')322	}323	if !syzType.Varlen() {324		size := syzType.Size()325		for uint64(len(bufVal)) < size {326			bufVal = append(bufVal, 0)327		}328		bufVal = bufVal[:size]329	}330	return prog.MakeDataArg(syzType, dir, bufVal)331}332func (ctx *context) genPtr(syzType *prog.PtrType, dir prog.Dir, traceType parser.IrType) prog.Arg {333	switch a := traceType.(type) {334	case parser.Constant:335		if a.Val() == 0 {336			return prog.MakeSpecialPointerArg(syzType, dir, 0)337		}338		// Likely have a type of the form bind(3, 0xfffffffff, [3]);339		res := syzType.Elem.DefaultArg(syzType.ElemDir)340		return ctx.addr(syzType, dir, res.Size(), res)341	default:342		res := ctx.genArg(syzType.Elem, syzType.ElemDir, a)343		return ctx.addr(syzType, dir, res.Size(), res)344	}345}346func (ctx *context) genConst(syzType prog.Type, dir prog.Dir, traceType parser.IrType) prog.Arg {347	switch a := traceType.(type) {348	case parser.Constant:349		return prog.MakeConstArg(syzType, dir, a.Val())350	case *parser.GroupType:351		// Sometimes strace represents a pointer to int as [0] which gets parsed352		// as Array([0], len=1). A good example is ioctl(3, FIONBIO, [1]). We may also have an union int type that353		// is a represented as a struct in strace e.g.354		// sigev_value={sival_int=-2123636944, sival_ptr=0x7ffd816bdf30}355		// For now we choose the first option356		if len(a.Elems) == 0 {357			log.Logf(2, "parsing const type, got array type with len 0")358			return syzType.DefaultArg(dir)359		}360		return ctx.genConst(syzType, dir, a.Elems[0])361	case *parser.BufferType:362		// strace decodes some arguments as hex strings because those values are network ordered363		// e.g. sin_port or sin_addr fields of sockaddr_in.364		// network order is big endian byte order so if the len of byte array is 1, 2, 4, or 8 then365		// it is a good chance that we are decoding one of those fields. If it isn't, then most likely366		// we have an error i.e. a sockaddr_un struct passed to a connect call with an inet file descriptor367		var val uint64368		toUint64 := binary.LittleEndian.Uint64369		toUint32 := binary.LittleEndian.Uint32370		toUint16 := binary.LittleEndian.Uint16371		if syzType.Format() == prog.FormatBigEndian {372			toUint64 = binary.BigEndian.Uint64373			toUint32 = binary.BigEndian.Uint32374			toUint16 = binary.BigEndian.Uint16...

genConst

Using AI Code Generation

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

genConst

Using AI Code Generation

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

genConst

Using AI Code Generation

1import (2func main() {3	p := proggen.New()4	p.GenConst("const1", "int", "1")5	p.GenConst("const2", "string", "hello")6	fmt.Println(p)7}8import (9func main() {10	p := proggen.New()11	p.GenVar("var1", "int", "1")12	p.GenVar("var2", "string", "hello")13	fmt.Println(p)14}15import (16func main() {17	p := proggen.New()18	p.GenType("type1", "int", "1")19	p.GenType("type2", "string", "hello")20	fmt.Println(p)21}22import (23func main() {24	p := proggen.New()25	p.GenFunc("func1", "int", "1")26	p.GenFunc("func2", "string", "hello")27	fmt.Println(p)28}29import (30func main() {31	p := proggen.New()32	p.GenStruct("struct1", "int", "1")33	p.GenStruct("struct2", "string", "hello")34	fmt.Println(p)35}

genConst

Using AI Code Generation

1import (2func main() {3	fmt.Println(proggen.GenConst("Hello", "World"))4}5import (6func main() {7	fmt.Println(proggen.GenConst("Hello", "World"))8}9import (10func main() {11	fmt.Println(proggen.GenConst("Hello", "World"))12}13import (14func main() {15	fmt.Println(proggen.GenConst("Hello", "World"))16}17import (18func main() {19	fmt.Println(proggen.GenConst("Hello", "World"))20}21import (22func main() {23	fmt.Println(proggen.GenConst("Hello", "World"))24}25import (26func main() {27	fmt.Println(proggen.GenConst("Hello", "World"))28}29import (30func main() {31	fmt.Println(proggen.GenConst("Hello", "World"))32}33import (34func main() {35	fmt.Println(proggen.GenConst("Hello", "World"))36}

genConst

Using AI Code Generation

1import "fmt"2func main() {3    var a int = proggen.genConst()4    fmt.Println(a)5}6import "fmt"7func main() {8    var a int = proggen.genConst()9    fmt.Println(a)10}11import "fmt"12func main() {13    var a int = proggen.genConst()14    fmt.Println(a)15}16import "fmt"17func main() {18    var a int = proggen.genConst()19    fmt.Println(a)20}21func genConst() int {22}23func genConst() int {24}25func genConst() int {26}27func genConst() int {28}29func genConst() int {30}31func genConst() int {32}33func genConst() int {34}35func genConst() int {36}37func genConst() int {38}

genConst

Using AI Code Generation

1import (2func main() {3    fmt.Println(proggen.GenConst())4}5import "fmt"6func GenConst() string {7    return fmt.Sprintf("Generated constant: %v", "hello")8}9import "fmt"10func GenConst() string {11    return fmt.Sprintf("Generated constant: %v", "hello")12}13import "fmt"14func GenConst() string {15    return fmt.Sprintf("Generated constant: %v", "hello")16}

genConst

Using AI Code Generation

1import "fmt"2import "proggen"3func main() {4pg := proggen.Proggen{}5pg.GenConst()6}7const (

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