How to use assignSize method of prog Package

Best Syzkaller code snippet using prog.assignSize

size.go

Source:size.go

...9	ParentRef = "parent"10	// Special reference directly to syscall arguments used in len targets.11	SyscallRef = "syscall"12)13func (target *Target) assignSizes(args []Arg, parentsMap map[Arg]Arg, syscallArgs []Arg, autos map[Arg]bool) {14	for _, arg := range args {15		if arg = InnerArg(arg); arg == nil {16			continue // Pointer to optional len field, no need to fill in value.17		}18		typ, ok := arg.Type().(*LenType)19		if !ok {20			continue21		}22		if autos != nil {23			if !autos[arg] {24				continue25			}26			delete(autos, arg)27		}28		a := arg.(*ConstArg)29		if typ.Path[0] == SyscallRef {30			target.assignSize(a, nil, typ.Path[1:], syscallArgs, parentsMap)31		} else {32			target.assignSize(a, a, typ.Path, args, parentsMap)33		}34	}35}36func (target *Target) assignSize(dst *ConstArg, pos Arg, path []string, args []Arg, parentsMap map[Arg]Arg) {37	elem := path[0]38	path = path[1:]39	var offset uint6440	for _, buf := range args {41		if elem != buf.Type().FieldName() {42			offset += buf.Size()43			continue44		}45		buf = InnerArg(buf)46		if buf == nil {47			dst.Val = 0 // target is an optional pointer48			return49		}50		if len(path) == 0 {51			dst.Val = target.computeSize(buf, offset, dst.Type().(*LenType))52		} else {53			target.assignSize(dst, buf, path, buf.(*GroupArg).Inner, parentsMap)54		}55		return56	}57	if elem == ParentRef {58		buf := parentsMap[pos]59		if len(path) == 0 {60			dst.Val = target.computeSize(buf, noOffset, dst.Type().(*LenType))61		} else {62			target.assignSize(dst, buf, path, buf.(*GroupArg).Inner, parentsMap)63		}64		return65	}66	for buf := parentsMap[pos]; buf != nil; buf = parentsMap[buf] {67		if elem != buf.Type().TemplateName() {68			continue69		}70		if len(path) == 0 {71			dst.Val = target.computeSize(buf, noOffset, dst.Type().(*LenType))72		} else {73			target.assignSize(dst, buf, path, buf.(*GroupArg).Inner, parentsMap)74		}75		return76	}77	var argNames []string78	for _, arg := range args {79		argNames = append(argNames, arg.Type().FieldName())80	}81	panic(fmt.Sprintf("len field %q references non existent field %q, pos=%q/%q, argsMap: %+v",82		dst.Type().FieldName(), elem, pos.Type().Name(), pos.Type().FieldName(), argNames))83}84const noOffset = ^uint64(0)85func (target *Target) computeSize(arg Arg, offset uint64, lenType *LenType) uint64 {86	if lenType.Offset {87		if offset == noOffset {88			panic("offset of a non-field")89		}90		return offset * 8 / lenType.BitSize91	}92	bitSize := lenType.BitSize93	if bitSize == 0 {94		bitSize = 895	}96	switch arg.Type().(type) {97	case *VmaType:98		a := arg.(*PointerArg)99		return a.VmaSize * 8 / bitSize100	case *ArrayType:101		a := arg.(*GroupArg)102		if lenType.BitSize != 0 {103			return a.Size() * 8 / bitSize104		}105		return uint64(len(a.Inner))106	default:107		return arg.Size() * 8 / bitSize108	}109}110func (target *Target) assignSizesArray(args []Arg, autos map[Arg]bool) {111	parentsMap := make(map[Arg]Arg)112	for _, arg := range args {113		ForeachSubArg(arg, func(arg Arg, _ *ArgCtx) {114			if _, ok := arg.Type().(*StructType); ok {115				for _, field := range arg.(*GroupArg).Inner {116					parentsMap[InnerArg(field)] = arg117				}118			}119		})120	}121	target.assignSizes(args, parentsMap, args, autos)122	for _, arg := range args {123		ForeachSubArg(arg, func(arg Arg, _ *ArgCtx) {124			if _, ok := arg.Type().(*StructType); ok {125				target.assignSizes(arg.(*GroupArg).Inner, parentsMap, args, autos)126			}127		})128	}129}130func (target *Target) assignSizesCall(c *Call) {131	target.assignSizesArray(c.Args, nil)132}133func (r *randGen) mutateSize(arg *ConstArg, parent []Arg) bool {134	typ := arg.Type().(*LenType)135	elemSize := typ.BitSize / 8136	if elemSize == 0 {137		elemSize = 1138		// TODO(dvyukov): implement path support for size mutation.139		if len(typ.Path) == 1 {140			for _, field := range parent {141				if typ.Path[0] != field.Type().FieldName() {142					continue143				}144				if inner := InnerArg(field); inner != nil {145					switch targetType := inner.Type().(type) {...

assignSize

Using AI Code Generation

1import "fmt"2type prog struct {3}4func (p *prog) assignSize(size int) {5}6func main() {7  p := prog{}8  p.assignSize(100)9  fmt.Println(p.size)10}

assignSize

Using AI Code Generation

1import (2type prog struct {3}4func (p *prog) assignSize(size int) {5}6func main() {7	p1 := prog{8	}9	fmt.Println(p1)10	p1.assignSize(2)11	fmt.Println(p1)12}13{hello 1 ram}14{hello 2 ram}15import (16type prog struct {17}18func main() {19	p1 := prog{20	}21	fmt.Println(p1)22	fmt.Println(p1)23}24{hello 1 ram}25{hi 1 ram}26import (27type prog struct {28}29func main() {30	p1 := prog{31	}32	fmt.Println(p1)33	fmt.Println(p1)34}35{hello 1 ram}36{hi 1 ram}37import (38type prog struct {39}40func main() {

assignSize

Using AI Code Generation

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

assignSize

Using AI Code Generation

1import (2func main() {3	p.assignSize(10)4	fmt.Println(p.getSize())5}6import (7func main() {8	p.assignSize(10)9	fmt.Println(p.getSize())10}

assignSize

Using AI Code Generation

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

assignSize

Using AI Code Generation

1import "fmt"2func main() {3    p1.assignSize(10)4    fmt.Println("Size of p1 is", p1.size)5}6import "fmt"7type prog struct {8}9func (p *prog) setSize(size int) {10}11func (p *prog) getSize() int {12}13func main() {14    p1.setSize(10)15    fmt.Println("Size of p1 is", p1.getSize())16}

assignSize

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Print("Enter a size: ")4    fmt.Scan(&size)5    p := prog{size: size}6    p.assignSize(10)7    fmt.Println(p.size)8}9In the above example, we define the assignSize() method on

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