How to use genType method of compiler Package

Best Syzkaller code snippet using compiler.genType

gen.go

Source:gen.go Github

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...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{...

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codegen.go

Source:codegen.go Github

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...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), "*/")...

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genType

Using AI Code Generation

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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}

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genType

Using AI Code Generation

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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}

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genType

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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}

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genType

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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() {

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genType

Using AI Code Generation

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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 (

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genType

Using AI Code Generation

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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])));

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genType

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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 (

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genType

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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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