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}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.