How to use patchConsts method of compiler Package

Best Syzkaller code snippet using compiler.patchConsts

consts.go

Source:consts.go Github

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...166 c.CallName, str)167 }168 }169}170// patchConsts replaces all symbolic consts with their numeric values taken from consts map.171// Updates desc and returns set of unsupported syscalls and flags.172func (comp *compiler) patchConsts(consts0 map[string]uint64) {173 consts := make(map[string]uint64)174 for name, val := range consts0 {175 consts[name] = val176 }177 for name, val := range comp.builtinConsts {178 if _, ok := consts[name]; ok {179 panic(fmt.Sprintf("builtin const %v already defined", name))180 }181 consts[name] = val182 }183 for _, decl := range comp.desc.Nodes {184 switch n := decl.(type) {185 case *ast.IntFlags:186 // Unsupported flag values are dropped.187 var values []*ast.Int188 for _, v := range n.Values {189 if comp.patchIntConst(v, consts, nil) {190 values = append(values, v)191 }192 }193 n.Values = values194 case *ast.Resource, *ast.Struct, *ast.Call, *ast.TypeDef:195 // Walk whole tree and replace consts in Type's and Int's.196 missing := ""197 comp.foreachType(decl, func(_ *ast.Type, desc *typeDesc,198 args []*ast.Type, _ prog.IntTypeCommon) {199 for i, arg := range args {200 if desc.Args[i].Type.Kind == kindInt {201 comp.patchTypeConst(arg, consts, &missing)202 }203 }204 })205 switch n := decl.(type) {206 case *ast.Resource:207 for _, v := range n.Values {208 comp.patchIntConst(v, consts, &missing)209 }210 case *ast.Call:211 for _, attr := range n.Attrs {212 if callAttrs[attr.Ident].HasArg {213 comp.patchTypeConst(attr.Args[0], consts, &missing)214 }215 }216 case *ast.Struct:217 for _, attr := range n.Attrs {218 if structOrUnionAttrs(n)[attr.Ident].HasArg {219 comp.patchTypeConst(attr.Args[0], consts, &missing)220 }221 }222 }223 if missing == "" {224 continue225 }226 // Produce a warning about unsupported syscall/resource/struct.227 // TODO(dvyukov): we should transitively remove everything that228 // depends on unsupported things. Potentially we still can get,229 // say, a bad int range error due to the wrong const value.230 // However, if we have a union where one of the options is231 // arch-specific and does not have a const value, it's probably232 // better to remove just that option. But then if we get to 0233 // options in the union, we still need to remove it entirely.234 pos, typ, name := decl.Info()235 if id := typ + " " + name; !comp.unsupported[id] {236 comp.unsupported[id] = true237 comp.warning(pos, "unsupported %v: %v due to missing const %v",238 typ, name, missing)239 }240 if c, ok := decl.(*ast.Call); ok {241 c.NR = ^uint64(0) // mark as unused to not generate it242 }243 }244 }245}246func (comp *compiler) patchIntConst(n *ast.Int, consts map[string]uint64, missing *string) bool {247 return comp.patchConst(&n.Value, &n.Ident, consts, missing, false)248}249func (comp *compiler) patchTypeConst(n *ast.Type, consts map[string]uint64, missing *string) {250 comp.patchConst(&n.Value, &n.Ident, consts, missing, true)251 for _, col := range n.Colon {252 comp.patchConst(&col.Value, &col.Ident, consts, missing, true)253 }254}255func (comp *compiler) patchConst(val *uint64, id *string, consts map[string]uint64, missing *string, reset bool) bool {256 if *id == "" {257 return true258 }259 if v, ok := consts[*id]; ok {260 if reset {261 *id = ""262 }263 *val = v264 return true265 }266 if missing != nil && *missing == "" {267 *missing = *id268 }269 // 1 is slightly safer than 0 and allows to work-around e.g. an array size270 // that comes from a const missing on an arch. Also see the TODO in patchConsts.271 *val = 1272 return false273}...

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patchConsts

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1import (2func main() {3 m := ir.NewModule()4 fn := m.NewFunc("foo", types.Void)5 entry := fn.NewBlock("entry")6 entry.NewRet(constant.NewInt(types.I32, 42))7 fmt.Println(m)8}

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patchConsts

Using AI Code Generation

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1import (2func main() {3 constants := []string{"a", "b", "c"}4 constExprs := []string{"1 + 2", "2 + 3", "3 + 4"}5 vars := []string{"x", "y", "z"}6 varExprs := []string{"1", "2", "3"}7 fset := token.NewFileSet()8 f, err := parser.ParseFile(fset, "2.go", nil, parser.ParseComments)9 if err != nil {10 log.Fatal(err)11 }12 info := &types.Info{13 Defs: make(map[*ast.Ident]types.Object),14 }15 _, err = config.Check("2.go", fset, []*ast.File{f}, info)16 if err != nil {17 log.Fatal(err)18 }19 for name := range info.Defs {20 if name.Name != "_" {21 names = append(names, name.Name)22 }23 }24 fmt.Println("Names:", strings.Join(names, ", "))25 fmt.Println("Types and values:")26 for _, name := range names {27 obj := info.Defs[ast.NewIdent(name)]28 fmt.Printf("%s: %s, %v\n", name, obj.Type(), obj)29 }

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patchConsts

Using AI Code Generation

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1import (2func main() {3 if len(os.Args) < 2 {4 fmt.Println("Usage: go run 2.go <filename>")5 os.Exit(1)6 }7 parser := parser.NewParser(filename)8 prog := parser.Parse()9 comp := compiler.NewCompiler()10 comp.Compile(prog)11 comp.PatchConsts()12 comp.DumpCode()13}

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patchConsts

Using AI Code Generation

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1import (2func main() {3 fmt.Println("a: ", a)4 fmt.Println("b: ", b)5 fmt.Println("swapping a and b")6 swap(&a, &b)7 fmt.Println("a: ", a)8 fmt.Println("b: ", b)9 fmt.Println("swapping a and b using reflect")10 swapReflect(&a, &b)11 fmt.Println("a: ", a)12 fmt.Println("b: ", b)13}14func swap(a *int, b *int) {15}16func swapReflect(a *int, b *int) {17 reflect.ValueOf(a).Elem().SetInt(int64(*b))18 reflect.ValueOf(b).Elem().SetInt(int64(*a))19}

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patchConsts

Using AI Code Generation

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1import "fmt"2import "github.com/elliotchance/c2go/program"3func main() {4 p := program.NewProgram()5 p.AddSourceFile("2.go")6 p.PatchConsts()7 fmt.Println(p.GetSourceFiles()[0].GetContents())8}9### Using `FindAll()` method10import "fmt"11import "github.com/elliotchance/c2go/program"12func main() {13 p := program.NewProgram()14 p.AddSourceFile("3.go")15 p.PatchConsts()16 fmt.Println(p.FindAll("main"))17}18### Using `Find()` method19import "fmt"20import "github.com/elliotchance/c2go/program"21func main() {22 p := program.NewProgram()23 p.AddSourceFile("4.go")24 p.PatchConsts()25 fmt.Println(p.Find("main"))26}27### Using `FindAll()` method28import "fmt"29import "github.com/elliotchance/c2go/program"30func main() {31 p := program.NewProgram()32 p.AddSourceFile("5.go")33 p.PatchConsts()34 fmt.Println(p.FindAll("main"))35}36### Using `Find()` method37import "fmt"38import "github.com/elliotchance/c2go/program"39func main() {40 p := program.NewProgram()41 p.AddSourceFile("6.go")

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patchConsts

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1import (2type compiler struct {3}4func (c *compiler) patchConsts() {5 for _, decl := range c.file.Decls {6 gen, ok := decl.(*ast.GenDecl)7 if !ok || gen.Tok != token.CONST {8 }9 for _, spec := range gen.Specs {10 valueSpec, ok := spec.(*ast.ValueSpec)11 if !ok {12 }13 for i, name := range valueSpec.Names {14 if name.Name == "Pi" {15 valueSpec.Values[i] = &ast.BasicLit{16 Value: strconv.FormatFloat(math.Pi, 'g', -1, 64),17 }18 }19 }20 }21 }22}23func main() {24 fset := token.NewFileSet()25 src, err := ioutil.ReadFile("2.go")26 if err != nil {27 log.Fatal(err)28 }29 c := &compiler{30 }31 f, err := parser.ParseFile(fset, "2.go", src, parser.ParseComments)32 if err != nil {33 log.Fatal(err)34 }35 c.patchConsts()36 fmt.Printf("%s", src)37}

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patchConsts

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1import (2func main() {3 var constsMap = make(map[string]int)4 file, err = os.Open("code.txt")5 if err != nil {6 fmt.Println(err)7 }8 defer file.Close()9 scanner = bufio.NewScanner(file)10 for scanner.Scan() {11 line = scanner.Text()12 code = append(code, line)13 }14 file, err = os.Open("consts.txt")15 if err != nil {16 fmt.Println(err)17 }18 defer file.Close()19 scanner = bufio.NewScanner(file)20 for scanner.Scan() {21 line = scanner.Text()22 consts = append(consts, line)23 }24 constsAddr, err = strconv.Atoi(consts[constsIndex])25 if err != nil {26 fmt.Println(err)27 }28 codeAddr, err = strconv.Atoi(code[codeIndex])29 if err != nil {30 fmt.Println(err)31 }32 for codeIndex < len(code) {33 if codeAddr == constsAddr {34 if constsIndex != len(consts) {35 constsAddr, err = strconv.Atoi(consts[constsIndex])36 if err != nil {37 fmt.Println(err)

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