How to use genType method of compiler Package

Best Syzkaller code snippet using compiler.genType

gen.go

Source:gen.go

...34	}35	if len(res.Values) == 0 {36		res.Values = []uint64{0}37	}38	res.Type = comp.genType(base, "", prog.DirIn, false)39	return res40}41func (comp *compiler) genSyscalls() []*prog.Syscall {42	var calls []*prog.Syscall43	for _, decl := range comp.desc.Nodes {44		if n, ok := decl.(*ast.Call); ok && n.NR != ^uint64(0) {45			calls = append(calls, comp.genSyscall(n))46		}47	}48	sort.Slice(calls, func(i, j int) bool {49		return calls[i].Name < calls[j].Name50	})51	for i, c := range calls {52		c.ID = i53	}54	return calls55}56func (comp *compiler) genSyscall(n *ast.Call) *prog.Syscall {57	var ret prog.Type58	if n.Ret != nil {59		ret = comp.genType(n.Ret, "ret", prog.DirOut, true)60	}61	return &prog.Syscall{62		Name:     n.Name.Name,63		CallName: n.CallName,64		NR:       n.NR,65		Args:     comp.genFieldArray(n.Args, prog.DirIn, true),66		Ret:      ret,67	}68}69func (comp *compiler) genStructDescs(syscalls []*prog.Syscall) []*prog.KeyedStruct {70	// Calculate struct/union/array sizes, add padding to structs and detach71	// StructDesc's from StructType's. StructType's can be recursive so it's72	// not possible to write them out inline as other types. To break the73	// recursion detach them, and write StructDesc's out as separate array74	// of KeyedStruct's. prog package will reattach them during init.75	padded := make(map[interface{}]bool)76	detach := make(map[**prog.StructDesc]bool)77	var structs []*prog.KeyedStruct78	var rec func(t prog.Type)79	checkStruct := func(key prog.StructKey, descp **prog.StructDesc) bool {80		detach[descp] = true81		desc := *descp82		if padded[desc] {83			return false84		}85		padded[desc] = true86		for _, f := range desc.Fields {87			rec(f)88			if !f.Varlen() && f.Size() == sizeUnassigned {89				// An inner struct is not padded yet.90				// Leave this struct for next iteration.91				delete(padded, desc)92				return false93			}94		}95		if comp.used[key.Name] {96			structs = append(structs, &prog.KeyedStruct{97				Key:  key,98				Desc: desc,99			})100		}101		return true102	}103	rec = func(t0 prog.Type) {104		switch t := t0.(type) {105		case *prog.PtrType:106			rec(t.Type)107		case *prog.ArrayType:108			if padded[t] {109				return110			}111			rec(t.Type)112			if !t.Type.Varlen() && t.Type.Size() == sizeUnassigned {113				// An inner struct is not padded yet.114				// Leave this array for next iteration.115				return116			}117			padded[t] = true118			t.TypeSize = 0119			if t.Kind == prog.ArrayRangeLen && t.RangeBegin == t.RangeEnd && !t.Type.Varlen() {120				t.TypeSize = t.RangeBegin * t.Type.Size()121			}122		case *prog.StructType:123			if !checkStruct(t.Key, &t.StructDesc) {124				return125			}126			// Add paddings, calculate size, mark bitfields.127			varlen := false128			for _, f := range t.Fields {129				if f.Varlen() {130					varlen = true131				}132			}133			comp.markBitfields(t.Fields)134			packed, alignAttr := comp.parseStructAttrs(comp.structNodes[t.StructDesc])135			t.Fields = comp.addAlignment(t.Fields, varlen, packed, alignAttr)136			t.AlignAttr = alignAttr137			t.TypeSize = 0138			if !varlen {139				for _, f := range t.Fields {140					if !f.BitfieldMiddle() {141						t.TypeSize += f.Size()142					}143				}144			}145		case *prog.UnionType:146			if !checkStruct(t.Key, &t.StructDesc) {147				return148			}149			t.TypeSize = 0150			varlen := comp.parseUnionAttrs(comp.structNodes[t.StructDesc])151			if !varlen {152				for _, fld := range t.Fields {153					if t.TypeSize < fld.Size() {154						t.TypeSize = fld.Size()155					}156				}157			}158		}159	}160	// We have to do this in the loop until we pad nothing new161	// due to recursive structs.162	for {163		start := len(padded)164		for _, c := range syscalls {165			for _, a := range c.Args {166				rec(a)167			}168			if c.Ret != nil {169				rec(c.Ret)170			}171		}172		if start == len(padded) {173			break174		}175	}176	// Detach StructDesc's from StructType's. prog will reattach them again.177	for descp := range detach {178		*descp = nil179	}180	sort.Slice(structs, func(i, j int) bool {181		si, sj := structs[i], structs[j]182		if si.Key.Name != sj.Key.Name {183			return si.Key.Name < sj.Key.Name184		}185		return si.Key.Dir < sj.Key.Dir186	})187	return structs188}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{...

codegen.go

Source:codegen.go

...47		}48	case ast.GoVarDecl:49		{50			c.write("var ", d.Name)51			c.genType(d.Type)52			c.toInit = append(c.toInit, d)53		}54	case ast.GoFuncDecl:55		c.genFuncDecl(d)56	default:57		panic("got unknow GoDecl in codegen")58	}59}60func (c *Codegen) genFuncDecl(d ast.GoFuncDecl) {61	c.write("func ", d.Name, "(")62	i := 063	for par, typ := range d.Params {64		if i > 0 {65			c.sb.WriteString(", ")66		}67		c.write(par, " ")68		c.genType(typ)69		i++70	}71	c.sb.WriteRune(')')72	if len(d.Returns) > 0 {73		c.sb.WriteRune(' ')74		if len(d.Returns) == 1 {75			c.genType(d.Returns[0])76		} else {77			c.sb.WriteRune('(')78			for i, ret := range d.Returns {79				if i > 0 {80					c.sb.WriteString(", ")81				}82				c.genType(ret)83			}84			c.sb.WriteRune(')')85		}86	}87	if d.Body == nil {88		c.sb.WriteString(" {}")89	} else {90		c.sb.WriteString(" {\n")91		c.withTab(func() {92			c.genExpr(*d.Body)93		})94		c.sb.WriteString("\n}\n\n")95	}96}97func (c *Codegen) genStruct(d ast.GoStruct) {98	c.write("type ", d.Name, " struct {")99	c.withTab(func() {100		for name, field := range d.Fields {101			c.sb.WriteRune('\n')102			c.writeTab(name, " ")103			c.genType(field)104		}105	})106	c.sb.WriteString("\n}\n\n")107}108func (c *Codegen) genInterface(d ast.GoInterface) {109	c.write("type ", d.Name, " interface {")110	c.withTab(func() {111		for _, method := range d.Methods {112			c.sb.WriteRune('\n')113			c.writeTab(method.Name, "(")114			for i, arg := range method.Args {115				if i > 0 {116					c.sb.WriteString(", ")117				}118				c.genType(arg)119			}120			c.sb.WriteString(")")121			if len(method.Ret) == 1 {122				c.sb.WriteRune(' ')123				c.genType(method.Ret[0])124			}125			if len(method.Ret) > 1 {126				c.sb.WriteString(" (")127				for i, ret := range method.Ret {128					if i > 0 {129						c.sb.WriteString(", ")130					}131					c.genType(ret)132				}133				c.sb.WriteRune(')')134			}135		}136	})137	c.sb.WriteString("\n}\n\n")138}139func (c *Codegen) genExpr(exp ast.GoExpr) {140	c.writePos(exp.GetPos())141	switch e := exp.(type) {142	case ast.GoConst:143		c.sb.WriteString(e.V)144	case ast.GoVar:145		{146			if e.Package != "" {147				c.write(e.Package, ".")148			}149			c.write(e.Name)150		}151	case ast.GoFunc:152		{153			c.sb.WriteString("func (")154			i := 0155			for v, ty := range e.Args {156				if i > 0 {157					c.sb.WriteString(", ")158				}159				c.write(v, " ")160				c.genType(ty)161				i++162			}163			c.sb.WriteRune(')')164			if len(e.Returns) > 0 {165				c.sb.WriteRune(' ')166				if len(e.Returns) == 1 {167					c.genType(e.Returns[0])168				} else {169					c.sb.WriteRune('(')170					for i, ty := range e.Returns {171						if i > 0 {172							c.sb.WriteString(", ")173						}174						c.genType(ty)175					}176					c.sb.WriteRune(')')177				}178			}179			c.write(" {\n")180			c.withTab(func() {181				c.sb.WriteString(c.tab)182				c.genExpr(e.Body)183			})184			c.write("\n", c.tab, "}")185		}186	case ast.GoCall:187		{188			c.genExpr(e.Fn)189			c.sb.WriteRune('(')190			for i, arg := range e.Args {191				if i > 0 {192					c.sb.WriteString(", ")193				}194				c.genExpr(arg)195			}196			c.sb.WriteRune(')')197		}198	case ast.GoReturn:199		{200			c.sb.WriteString("return ")201			c.genExpr(e.Exp)202		}203	case ast.GoIf:204		{205			c.sb.WriteString("if ")206			c.genExpr(e.Cond)207			c.sb.WriteString(" {\n")208			c.withTab(func() {209				c.sb.WriteString(c.tab)210				c.genExpr(e.Then)211			})212			c.write("\n", c.tab, "} else {\n")213			c.withTab(func() {214				c.sb.WriteString(c.tab)215				c.genExpr(e.Else)216			})217			c.write("\n", c.tab, "}")218		}219	case ast.GoVarDef:220		{221			c.write("var ", e.Name, " ")222			c.genType(e.Type)223		}224	case ast.GoLet:225		{226			c.write(e.Binder, " := ")227			c.genExpr(e.BindExpr)228		}229	case ast.GoSetvar:230		{231			c.write(e.Name, " = ")232			c.genExpr(e.Exp)233		}234	case ast.GoStmts:235		for i, exp := range e.Exps {236			if i > 0 {237				c.write("\n", c.tab)238			}239			c.genExpr(exp)240		}241	case ast.GoUnit:242		c.sb.WriteString("nil")243	case ast.GoNil:244		c.sb.WriteString("nil")245	case ast.GoWhile:246		{247			c.sb.WriteString("for ")248			c.genExpr(e.Cond)249			c.withTab(func() {250				c.write(" {\n", c.tab)251				for i, exp := range e.Exps {252					if i > 0 {253						c.write("\n", c.tab)254					}255					c.genExpr(exp)256				}257			})258		}259	default:260		panic("unknow GoExpr in codegen")261	}262}263func (c *Codegen) genType(typ ast.GoType) {264	switch t := typ.(type) {265	case ast.GoTConst:266		{267			if t.Package != "" {268				c.write(t.Package, ".")269			}270			c.write(t.Name)271		}272	case ast.GoTFunc:273		{274			c.sb.WriteString("func(")275			c.genType(t.Arg)276			c.sb.WriteString(") ")277			c.genType(t.Ret)278		}279	}280}281func (c *Codegen) write(strs ...string) {282	for _, s := range strs {283		c.sb.WriteString(s)284	}285}286func (c *Codegen) writeTab(strs ...string) {287	c.sb.WriteString(c.tab)288	c.write(strs...)289}290func (c *Codegen) writePos(pos data.Pos) {291	c.write("/*line :", strconv.Itoa(pos.Line), ":", strconv.Itoa(pos.Col), "*/")...

genType

Using AI Code Generation

1import (2func main() {3	fmt.Println("Enter your name: ")4	fmt.Scanln(&name)5	fmt.Println("Hello", name)6}7import (8func main() {9	fmt.Println("Enter your name: ")10	fmt.Scanln(&name)11	fmt.Println("Hello", name)12}13import (14func main() {15	fmt.Println("Enter your name: ")16	fmt.Scanln(&name)17	fmt.Println("Hello", name)18}19import (20func main() {21	fmt.Println("Enter your name: ")22	fmt.Scanln(&name)23	fmt.Println("Hello", name)24}25import (26func main() {27	fmt.Println("Enter your name: ")28	fmt.Scanln(&name)29	fmt.Println("Hello", name)30}31import (32func main() {33	fmt.Println("Enter your name: ")34	fmt.Scanln(&name)35	fmt.Println("Hello", name)36}37import (38func main() {39	fmt.Println("Enter your name: ")40	fmt.Scanln(&name)41	fmt.Println("Hello", name)42}43import (44func main() {45	fmt.Println("Enter your name: ")46	fmt.Scanln(&name)47	fmt.Println("Hello", name)48}49import (50func main() {51	fmt.Println("Enter your name: ")52	fmt.Scanln(&name)53	fmt.Println("Hello", name)54}

genType

Using AI Code Generation

1import (2type Person struct {3}4func main() {5	p := Person{name: "Abhishek", age: 27}6	fmt.Println("Type of p: ", reflect.TypeOf(p))7	fmt.Println("Value of p: ", reflect.ValueOf(p))8}9Value of p:  {Abhishek 27}

genType

Using AI Code Generation

1import (2type Foo struct {3}4func main() {5	var t reflect.Type = reflect.TypeOf(Foo{})6	fmt.Println(t)7	fmt.Println(t.Name())8}

genType

Using AI Code Generation

1import (2func main() {3	fmt.Println(reflect.TypeOf(a))4}5import (6func main() {7	fmt.Println(reflect.TypeOf(a))8}9import (10func main() {11	fmt.Println(reflect.TypeOf(a))12}13import (14func main() {15	fmt.Println(reflect.TypeOf(a))16}17import (18func main() {19	fmt.Println(reflect.TypeOf(a))20}21import (22func main() {23	fmt.Println(reflect.TypeOf(a))24}25import (26func main() {27	fmt.Println(reflect.TypeOf(a))28}29import (30func main() {31	fmt.Println(reflect.TypeOf(a))32}33import (34func main() {

genType

Using AI Code Generation

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

genType

Using AI Code Generation

1import java.io.*;2public class genType {3    public static void main(String args[]) {4        try {5            compiler c = new compiler(new BufferedReader(new FileReader(args[0])));6            c.parse();7            c.printParseTree(" ");8            c.printCode(args[1]);9        } catch (Exception e) {10            System.out.println("Exception occurred during parsing");11        }12    }13}14import java.io.*;15public class genType {16    public static void main(String args[]) {17        try {18            compiler c = new compiler(new BufferedReader(new FileReader(args[0])));19            c.parse();20            c.printParseTree(" ");21            c.printCode(args[1]);22        } catch (Exception e) {23            System.out.println("Exception occurred during parsing");24        }25    }26}27import java.io.*;28public class genType {29    public static void main(String args[]) {30        try {31            compiler c = new compiler(new BufferedReader(new FileReader(args[0])));32            c.parse();33            c.printParseTree(" ");34            c.printCode(args[1]);35        } catch (Exception e) {36            System.out.println("Exception occurred during parsing");37        }38    }39}40import java.io.*;41public class genType {42    public static void main(String args[]) {43        try {44            compiler c = new compiler(new BufferedReader(new FileReader(args[0])));

genType

Using AI Code Generation

1import (2func main() {3	c.GenType("int")4	c.GenType("float")5	c.GenType("string")6	fmt.Println(c)7}8import (9func main() {10	c.GenType("int")11	c.GenVar("i")12	c.GenType("float")13	c.GenVar("f")14	c.GenType("string")15	c.GenVar("s")16	fmt.Println(c)17}18import (19func main() {20	c.GenType("int")21	c.GenVar("i")22	c.GenType("float")23	c.GenVar("f")24	c.GenType("string")25	c.GenVar("s")26	c.GenFunc("main")27	fmt.Println(c)28}29import (30func main() {31	c.GenType("int")32	c.GenVar("i")33	c.GenType("float")34	c.GenVar("f")35	c.GenType("string")36	c.GenVar("s")37	c.GenFunc("main")38	c.GenReturn("0")39	fmt.Println(c)40}41import (42func main() {43	c.GenType("int")44	c.GenVar("i")45	c.GenType("float")46	c.GenVar("f")47	c.GenType("string")48	c.GenVar("s")49	c.GenFunc("main")50	c.GenReturn("0")51	fmt.Println(c)52}53import (

genType

Using AI Code Generation

1func (c *compiler) genFunc(f *ast.FuncDecl) string {2    c.genFuncDecl(f)3}4func (c *compiler) genFuncDecl(f *ast.FuncDecl) {5    c.genFuncBody()6}7func (c *compiler) genFuncBody() {8    c.locals = make(map[string]int)9    c.labels = make(map[string]int)10    c.breaks = make(map[int]string)11    c.continues = make(map[int]string)12    c.gotos = make(map[string]int)13    c.switches = make(map[int]string)14    c.cases = make(map[int]string)15    c.caseValues = make(map[int]int64)16    c.caseExprs = make(map[int]ast.Expr)17    c.defaults = make(map[int]string)18    c.params = make(map[string]int)19    c.results = make(map[string]int)

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