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How to use genCommon method of compiler Package

Best Syzkaller code snippet using compiler.genCommon

gen.go

Source:gen.go

...189func (comp *compiler) genStructDesc(res *prog.StructDesc, n *ast.Struct, dir prog.Dir) {190	// Leave node for genStructDescs to calculate size/padding.191	comp.structNodes[res] = n192	*res = prog.StructDesc{193		TypeCommon: genCommon(n.Name.Name, "", sizeUnassigned, dir, false),194		Fields:     comp.genFieldArray(n.Fields, dir, false),195	}196}197func (comp *compiler) isStructVarlen(name string) bool {198	if varlen, ok := comp.structVarlen[name]; ok {199		return varlen200	}201	s := comp.structs[name]202	if s.IsUnion && comp.parseUnionAttrs(s) {203		comp.structVarlen[name] = true204		return true205	}206	comp.structVarlen[name] = false // to not hang on recursive types207	varlen := false208	for _, fld := range s.Fields {209		if comp.isVarlen(fld.Type) {210			varlen = true211			break212		}213	}214	comp.structVarlen[name] = varlen215	return varlen216}217func (comp *compiler) markBitfields(fields []prog.Type) {218	var bfOffset uint64219	for i, f := range fields {220		if f.BitfieldLength() == 0 {221			continue222		}223		off, middle := bfOffset, true224		bfOffset += f.BitfieldLength()225		if i == len(fields)-1 || // Last bitfield in a group, if last field of the struct...226			fields[i+1].BitfieldLength() == 0 || // or next field is not a bitfield...227			f.Size() != fields[i+1].Size() || // or next field is of different size...228			bfOffset+fields[i+1].BitfieldLength() > f.Size()*8 { // or next field does not fit into the current group.229			middle, bfOffset = false, 0230		}231		setBitfieldOffset(f, off, middle)232	}233}234func setBitfieldOffset(t0 prog.Type, offset uint64, middle bool) {235	switch t := t0.(type) {236	case *prog.IntType:237		t.BitfieldOff, t.BitfieldMdl = offset, middle238	case *prog.ConstType:239		t.BitfieldOff, t.BitfieldMdl = offset, middle240	case *prog.LenType:241		t.BitfieldOff, t.BitfieldMdl = offset, middle242	case *prog.FlagsType:243		t.BitfieldOff, t.BitfieldMdl = offset, middle244	case *prog.ProcType:245		t.BitfieldOff, t.BitfieldMdl = offset, middle246	default:247		panic(fmt.Sprintf("type %#v can't be a bitfield", t))248	}249}250func (comp *compiler) addAlignment(fields []prog.Type, varlen, packed bool, alignAttr uint64) []prog.Type {251	var newFields []prog.Type252	if packed {253		// If a struct is packed, statically sized and has explicitly set alignment,254		// add a padding at the end.255		newFields = fields256		if !varlen && alignAttr != 0 {257			size := uint64(0)258			for _, f := range fields {259				size += f.Size()260			}261			if tail := size % alignAttr; tail != 0 {262				newFields = append(newFields, genPad(alignAttr-tail))263			}264		}265		return newFields266	}267	var align, off uint64268	for i, f := range fields {269		if i > 0 && !fields[i-1].BitfieldMiddle() {270			a := comp.typeAlign(f)271			if align < a {272				align = a273			}274			// Append padding if the last field is not a bitfield or it's the last bitfield in a set.275			if off%a != 0 {276				pad := a - off%a277				off += pad278				newFields = append(newFields, genPad(pad))279			}280		}281		newFields = append(newFields, f)282		if !f.BitfieldMiddle() && (i != len(fields)-1 || !f.Varlen()) {283			// Increase offset if the current field is not a bitfield284			// or it's the last bitfield in a set, except when it's285			// the last field in a struct and has variable length.286			off += f.Size()287		}288	}289	if alignAttr != 0 {290		align = alignAttr291	}292	if align != 0 && off%align != 0 && !varlen {293		pad := align - off%align294		off += pad295		newFields = append(newFields, genPad(pad))296	}297	return newFields298}299func (comp *compiler) typeAlign(t0 prog.Type) uint64 {300	switch t0.(type) {301	case *prog.IntType, *prog.ConstType, *prog.LenType, *prog.FlagsType, *prog.ProcType,302		*prog.CsumType, *prog.PtrType, *prog.VmaType, *prog.ResourceType:303		return t0.Size()304	case *prog.BufferType:305		return 1306	}307	switch t := t0.(type) {308	case *prog.ArrayType:309		return comp.typeAlign(t.Type)310	case *prog.StructType:311		packed, alignAttr := comp.parseStructAttrs(comp.structNodes[t.StructDesc])312		if alignAttr != 0 {313			return alignAttr // overrided by user attribute314		}315		if packed {316			return 1317		}318		align := uint64(0)319		for _, f := range t.Fields {320			if a := comp.typeAlign(f); align < a {321				align = a322			}323		}324		return align325	case *prog.UnionType:326		align := uint64(0)327		for _, f := range t.Fields {328			if a := comp.typeAlign(f); align < a {329				align = a330			}331		}332		return align333	default:334		panic(fmt.Sprintf("unknown type: %#v", t))335	}336}337func genPad(size uint64) prog.Type {338	return &prog.ConstType{339		IntTypeCommon: genIntCommon(genCommon("pad", "", size, prog.DirIn, false), 0, false),340		IsPad:         true,341	}342}343func (comp *compiler) genField(f *ast.Field, dir prog.Dir, isArg bool) prog.Type {344	return comp.genType(f.Type, f.Name.Name, dir, isArg)345}346func (comp *compiler) genFieldArray(fields []*ast.Field, dir prog.Dir, isArg bool) []prog.Type {347	var res []prog.Type348	for _, f := range fields {349		res = append(res, comp.genField(f, dir, isArg))350	}351	return res352}353func (comp *compiler) genType(t *ast.Type, field string, dir prog.Dir, isArg bool) prog.Type {354	desc, args, base := comp.getArgsBase(t, field, dir, isArg)355	return desc.Gen(comp, t, args, base)356}357func genCommon(name, field string, size uint64, dir prog.Dir, opt bool) prog.TypeCommon {358	return prog.TypeCommon{359		TypeName:   name,360		TypeSize:   size,361		FldName:    field,362		ArgDir:     dir,363		IsOptional: opt,364	}365}366func genIntCommon(com prog.TypeCommon, bitLen uint64, bigEndian bool) prog.IntTypeCommon {367	return prog.IntTypeCommon{368		TypeCommon:  com,369		BigEndian:   bigEndian,370		BitfieldLen: bitLen,371	}...

genCommon

Using AI Code Generation

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

genCommon

Using AI Code Generation

1func main() {2    compiler := new(Compiler)3    compiler.genCommon()4}5type Compiler struct {6}7func (c *Compiler) genCommon() {8}

genCommon

Using AI Code Generation

1import (2func main() {3import "fmt"4func main() {5	fmt.Println("Hello World")6}7	c := compiler.New()8	c.SetCode(code)9	c.SetOutput("2.exe")10	c.SetCompiler("go")11	err := c.Compile()12	if err != nil {13		fmt.Println(err)14	}15}16import (17type Compiler struct {18}19func New() *Compiler {20	return &Compiler{}21}22func (c *Compiler) SetCode(code string) {23}24func (c *Compiler) SetOutput(output string) {25}26func (c *Compiler) SetCompiler(compiler string) {27}28func (c *Compiler) Compile() error {29	if c.Compiler == "go" {30		return c.genCommon()31	}32	return errors.New("Unknown language")33}34func (c *Compiler) genCommon() error {35	dir, err := ioutil.TempDir("", "compiler")36	if err != nil {37	}38	defer os.RemoveAll(dir)39	c.Output = filepath.Join(dir, c.Output)40	err = ioutil.WriteFile(c.Output+".go", []byte(c.Code), 0644)41	if err != nil {42	}43	cmd := exec.Command("go", "build", "-o", c.Output, c.Output+".go")44	err = cmd.Run()45	if err != nil {46		return errors.New(out.String())47	}48}49import (50func TestCompiler(t *testing.T) {51import "fmt"52func main() {53	fmt.Println("Hello World")54}55	c := New()56	c.SetCode(code)57	c.SetOutput("2.exe")58	c.SetCompiler("go")59	err := c.Compile()60	if err != nil {61		t.Error(err)62	}63}

genCommon

Using AI Code Generation

1import (2func main() {3	f, err := os.Create("common.asm")4	if err != nil {5		fmt.Println(err)6	}7	defer f.Close()8	_, err = f.WriteString(`9	if err != nil {10		fmt.Println(err)11		f.Close()12	}13}

genCommon

Using AI Code Generation

1import (2func main() {3	compiler := new(Compiler)4	code := compiler.genCommon("func1", "func2")5	file, err := os.Create("common.txt")6	if err != nil {7		fmt.Println("Error while creating file")8	}9	file.WriteString(code)10	file.Close()11	codeFromFile, err := ioutil.ReadFile("common.txt")12	if err != nil {13		fmt.Println("Error while reading file")14	}15	fmt.Println("The common code is:")16	fmt.Println(string(codeFromFile))17}18type Compiler struct {19}20func (compiler *Compiler) genCommon(func1, func2 string) string {21	code := "function " + func1 + "(){\n"22	code += "}\n\n"23	code += "function " + func2 + "(){\n"24	code += "}\n\n"25	code += "function main(){\n"26	code += "\t" + func1 + "();\n"27	code += "\t" + func2 + "();\n"28	code += "}\n"29}30function func1(){31}32function func2(){33}34function main(){35	func1();36	func2();37}

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