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How to use setBitfieldTypeSize method of compiler Package

Best Syzkaller code snippet using compiler.setBitfieldTypeSize

gen.go

Source:gen.go

...310		if fieldOffset > byteOffset {311			pad := fieldOffset - byteOffset312			byteOffset += pad313			if i != 0 && t.Fields[i-1].IsBitfield() {314				setBitfieldTypeSize(t.Fields[i-1].Type, pad)315				if bitOffset >= 8*pad {316					// The padding is due to bitfields, so consume the bitOffset.317					bitOffset -= 8 * pad318				} else if bitOffset >= 8 {319					// Unclear is this is a bug or not and what to do in this case.320					// But since we don't have any descriptions that trigger this,321					// let's just guard with the panic.322					panic(fmt.Sprintf("bad bitOffset: %v.%v pad=%v bitOffset=%v",323						t.Name(), field.Name, pad, bitOffset))324				}325			} else {326				newFields = append(newFields, genPad(pad))327			}328		}329		if f.IsBitfield() {330			if byteOffset > fieldOffset {331				unitOffset := byteOffset - fieldOffset332				setBitfieldUnitOffset(f, unitOffset)333			}334		}335		newFields = append(newFields, field)336		if f.IsBitfield() {337			bitOffset += f.BitfieldLength()338		} else if !f.Varlen() {339			// Increase offset if the current field except when it's340			// the last field in a struct and has variable length.341			byteOffset += f.Size()342		}343	}344	if bitOffset != 0 {345		pad := roundup(bitOffset, 8) / 8346		byteOffset += pad347		i := len(t.Fields)348		if i != 0 && t.Fields[i-1].IsBitfield() {349			setBitfieldTypeSize(t.Fields[i-1].Type, pad)350		} else {351			newFields = append(newFields, genPad(pad))352		}353	}354	if t.AlignAttr != 0 {355		structAlign = t.AlignAttr356	}357	if !varlen && structAlign != 0 && byteOffset%structAlign != 0 {358		pad := structAlign - byteOffset%structAlign359		newFields = append(newFields, genPad(pad))360	}361	t.Fields = newFields362}363func roundup(v, a uint64) uint64 {364	return rounddown(v+a-1, a)365}366func rounddown(v, a uint64) uint64 {367	if (a & (a - 1)) != 0 {368		panic(fmt.Sprintf("rounddown(%v)", a))369	}370	return v & ^(a - 1)371}372func bitfieldFields(t0 prog.Type) (*uint64, *uint64, *uint64) {373	switch t := t0.(type) {374	case *prog.IntType:375		return &t.TypeSize, &t.BitfieldOff, &t.BitfieldUnitOff376	case *prog.ConstType:377		return &t.TypeSize, &t.BitfieldOff, &t.BitfieldUnitOff378	case *prog.LenType:379		return &t.TypeSize, &t.BitfieldOff, &t.BitfieldUnitOff380	case *prog.FlagsType:381		return &t.TypeSize, &t.BitfieldOff, &t.BitfieldUnitOff382	case *prog.ProcType:383		return &t.TypeSize, &t.BitfieldOff, &t.BitfieldUnitOff384	default:385		panic(fmt.Sprintf("type %#v can't be a bitfield", t))386	}387}388func setBitfieldTypeSize(t prog.Type, v uint64) {389	p, _, _ := bitfieldFields(t)390	*p = v391}392func setBitfieldOffset(t prog.Type, v uint64) {393	_, p, _ := bitfieldFields(t)394	*p = v395}396func setBitfieldUnitOffset(t prog.Type, v uint64) {397	_, _, p := bitfieldFields(t)398	*p = v399}400func genPad(size uint64) prog.Field {401	return prog.Field{402		Type: &prog.ConstType{...

setBitfieldTypeSize

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Printf("Line 1 - Value of c is %d4    fmt.Printf("Line 2 - Value of c is %d5    fmt.Printf("Line 3 - Value of c is %d6    fmt.Printf("Line 4 - Value of c is %d7    fmt.Printf("Line 5 - Value of c is %d8}

setBitfieldTypeSize

Using AI Code Generation

1import (2func main() {3    fmt.Println("Size of int8: ", unsafe.Sizeof(int8(0)))4    fmt.Println("Size of int16: ", unsafe.Sizeof(int16(0)))5    fmt.Println("Size of int32: ", unsafe.Sizeof(int32(0)))6    fmt.Println("Size of int64: ", unsafe.Sizeof(int64(0)))7}

setBitfieldTypeSize

Using AI Code Generation

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

setBitfieldTypeSize

Using AI Code Generation

1import (2func main() {3    compiler := vm.NewCompiler()4    compiler.SetBitfieldTypeSize(32)5    fmt.Println(compiler.BitfieldTypeSize())6}

setBitfieldTypeSize

Using AI Code Generation

1import "fmt"2import "unsafe"3func main() {4var x struct {5}6fmt.Printf("Size of struct with 3 ints: %d bytes7", unsafe.Sizeof(x))8}

setBitfieldTypeSize

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Println("Hello, playground")4}5import (6func main() {7    fmt.Println("Hello, playground")8    compiler := vm.NewEVMCompiler(params.AllEthashProtocolChanges, vm.Config{})9    compiler.SetBitfieldTypeSize(4)10}

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