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How to use finalizeStructFields method of compiler Package

Best Syzkaller code snippet using compiler.finalizeStructFields

gen.go

Source:gen.go

...293		f := field.Type294		if i == overlayField0 {295			// We layout fields before overlay and the overlay fields effectively as 2 independent structs.296			// So if we starting overlay, add any trailign padding/finalize bitfield layout and reset state.297			newFields = comp.finalizeStructFields(t, newFields, varlen, structAlign, byteOffset, bitOffset)298			t.OverlayField = len(newFields) // update overlay field index after we added paddings299			structAlign, byteOffset, bitOffset = 0, 0, 0300		}301		fieldAlign := uint64(1)302		if !packed {303			fieldAlign = f.Alignment()304			if structAlign < fieldAlign {305				structAlign = fieldAlign306			}307		}308		fullBitOffset := byteOffset*8 + bitOffset309		var fieldOffset uint64310		if f.IsBitfield() {311			unitAlign := f.UnitSize()312			if packed {313				unitAlign = 1314			}315			fieldOffset = rounddown(fullBitOffset/8, unitAlign)316			unitBits := f.UnitSize() * 8317			occupiedBits := fullBitOffset - fieldOffset*8318			remainBits := unitBits - occupiedBits319			if remainBits < f.BitfieldLength() {320				fieldOffset = roundup(roundup(fullBitOffset, 8)/8, unitAlign)321				fullBitOffset, bitOffset = 0, 0322			} else if fieldOffset*8 >= fullBitOffset {323				fullBitOffset, bitOffset = fieldOffset*8, 0324			}325			fieldBitOffset := (fullBitOffset - fieldOffset*8) % unitBits326			setBitfieldOffset(f, fieldBitOffset)327		} else {328			fieldOffset = roundup(roundup(fullBitOffset, 8)/8, fieldAlign)329			bitOffset = 0330		}331		if fieldOffset > byteOffset {332			pad := fieldOffset - byteOffset333			byteOffset += pad334			if i != 0 && t.Fields[i-1].IsBitfield() {335				setBitfieldTypeSize(t.Fields[i-1].Type, pad)336				if bitOffset >= 8*pad {337					// The padding is due to bitfields, so consume the bitOffset.338					bitOffset -= 8 * pad339				} else if bitOffset >= 8 {340					// Unclear is this is a bug or not and what to do in this case.341					// But since we don't have any descriptions that trigger this,342					// let's just guard with the panic.343					panic(fmt.Sprintf("bad bitOffset: %v.%v pad=%v bitOffset=%v",344						t.Name(), field.Name, pad, bitOffset))345				}346			} else {347				newFields = append(newFields, genPad(pad))348			}349		}350		if f.IsBitfield() {351			if byteOffset > fieldOffset {352				unitOffset := byteOffset - fieldOffset353				setBitfieldUnitOffset(f, unitOffset)354			}355		}356		newFields = append(newFields, field)357		if f.IsBitfield() {358			bitOffset += f.BitfieldLength()359		} else if !f.Varlen() {360			// Increase offset if the current field except when it's361			// the last field in a struct and has variable length.362			byteOffset += f.Size()363		}364	}365	t.Fields = comp.finalizeStructFields(t, newFields, varlen, structAlign, byteOffset, bitOffset)366}367func (comp *compiler) finalizeStructFields(t *prog.StructType, fields []prog.Field, varlen bool,368	structAlign, byteOffset, bitOffset uint64) []prog.Field {369	if bitOffset != 0 {370		pad := roundup(bitOffset, 8) / 8371		byteOffset += pad372		i := len(fields)373		if i != 0 && fields[i-1].IsBitfield() {374			setBitfieldTypeSize(fields[i-1].Type, pad)375		} else {376			fields = append(fields, genPad(pad))377		}378	}379	if t.AlignAttr != 0 {380		structAlign = t.AlignAttr381	}...

finalizeStructFields

Using AI Code Generation

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

finalizeStructFields

Using AI Code Generation

1import (2type Employee struct {3}4func main() {5    emp := Employee{"John", 30}6    t := reflect.TypeOf(emp)7    for i := 0; i < t.NumField(); i++ {8        fmt.Println("Field Name:", t.Field(i).Name)9        fmt.Println("Field Type:", t.Field(i).Type)10    }11}12import (13type Employee struct {14}15func main() {16    emp := Employee{"John", 30}17    t := reflect.TypeOf(emp)18    for i := 0; i < t.NumField(); i++ {19        fmt.Println("Field Name:", t.Field(i).Name)20        fmt.Println("Field Type:", t.Field(i).Type)21        fmt.Println("Field Offset:", t.Field(i).Offset)22    }23}24import (25type Employee struct {26}27func main() {28    emp := Employee{"John", 30}29    t := reflect.TypeOf(emp)30    for i := 0; i < t.NumField(); i++ {31        fmt.Println("Field Name:", t.Field(i).Name)32        fmt.Println("Field Type:", t.Field(i).Type)33        fmt.Println("Field Offset:", t.Field(i).Offset)34        fmt.Println("Field PkgPath:", t.Field(i).PkgPath)35    }36}

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