How to use LoggingHandler method of ast Package

Best Syzkaller code snippet using ast.LoggingHandler

consts.go

Source:consts.go

...27		msg = fmt.Sprintf(msg, args...)28		if eh0 != nil {29			eh0(pos, msg)30		} else {31			ast.LoggingHandler(pos, msg)32		}33	}34	info := &ConstInfo{35		Defines: make(map[string]string),36	}37	includeMap := make(map[string]bool)38	incdirMap := make(map[string]bool)39	constMap := make(map[string]bool)40	ast.Walk(desc, func(n1 ast.Node) {41		switch n := n1.(type) {42		case *ast.Include:43			file := n.File.Value44			if includeMap[file] {45				eh(n.Pos, "duplicate include %q", file)46			}47			includeMap[file] = true48			info.Includes = append(info.Includes, file)49		case *ast.Incdir:50			dir := n.Dir.Value51			if incdirMap[dir] {52				eh(n.Pos, "duplicate incdir %q", dir)53			}54			incdirMap[dir] = true55			info.Incdirs = append(info.Incdirs, dir)56		case *ast.Define:57			v := fmt.Sprint(n.Value.Value)58			switch {59			case n.Value.CExpr != "":60				v = n.Value.CExpr61			case n.Value.Ident != "":62				v = n.Value.Ident63			}64			name := n.Name.Name65			if info.Defines[name] != "" {66				eh(n.Pos, "duplicate define %v", name)67			}68			info.Defines[name] = v69			constMap[name] = true70		case *ast.Call:71			if target.SyscallNumbers && !strings.HasPrefix(n.CallName, "syz_") {72				constMap[target.SyscallPrefix+n.CallName] = true73			}74		case *ast.Type:75			if c := typeConstIdentifier(n); c != nil {76				constMap[c.Ident] = true77				constMap[c.Ident2] = true78			}79		case *ast.Int:80			constMap[n.Ident] = true81		}82	})83	if errors != 0 {84		return nil85	}86	info.Consts = toArray(constMap)87	return info88}89// assignSyscallNumbers assigns syscall numbers, discards unsupported syscalls90// and removes no longer irrelevant nodes from the tree (comments, new lines, etc).91func (comp *compiler) assignSyscallNumbers(consts map[string]uint64) {92	// Pseudo syscalls starting from syz_ are assigned numbers starting from syzbase.93	// Note: the numbers must be stable (not depend on file reading order, etc),94	// so we have to do it in 2 passes.95	const syzbase = 100000096	syzcalls := make(map[string]bool)97	for _, decl := range comp.desc.Nodes {98		c, ok := decl.(*ast.Call)99		if !ok {100			continue101		}102		if strings.HasPrefix(c.CallName, "syz_") {103			syzcalls[c.CallName] = true104		}105	}106	syznr := make(map[string]uint64)107	for i, name := range toArray(syzcalls) {108		syznr[name] = syzbase + uint64(i)109	}110	var top []ast.Node111	for _, decl := range comp.desc.Nodes {112		switch decl.(type) {113		case *ast.Call:114			c := decl.(*ast.Call)115			if strings.HasPrefix(c.CallName, "syz_") {116				c.NR = syznr[c.CallName]117				top = append(top, decl)118				continue119			}120			if !comp.target.SyscallNumbers {121				top = append(top, decl)122				continue123			}124			// Lookup in consts.125			str := comp.target.SyscallPrefix + c.CallName126			nr, ok := consts[str]127			top = append(top, decl)128			if ok {129				c.NR = nr130				continue131			}132			c.NR = ^uint64(0) // mark as unused to not generate it133			name := "syscall " + c.CallName134			if !comp.unsupported[name] {135				comp.unsupported[name] = true136				comp.warning(c.Pos, "unsupported syscall: %v due to missing const %v",137					c.CallName, str)138			}139		case *ast.IntFlags, *ast.Resource, *ast.Struct, *ast.StrFlags:140			top = append(top, decl)141		case *ast.NewLine, *ast.Comment, *ast.Include, *ast.Incdir, *ast.Define:142			// These are not needed anymore.143		default:144			panic(fmt.Sprintf("unknown node type: %#v", decl))145		}146	}147	comp.desc.Nodes = top148}149// patchConsts replaces all symbolic consts with their numeric values taken from consts map.150// Updates desc and returns set of unsupported syscalls and flags.151// After this pass consts are not needed for compilation.152func (comp *compiler) patchConsts(consts map[string]uint64) {153	var top []ast.Node154	for _, decl := range comp.desc.Nodes {155		switch decl.(type) {156		case *ast.IntFlags:157			// Unsupported flag values are dropped.158			n := decl.(*ast.IntFlags)159			var values []*ast.Int160			for _, v := range n.Values {161				if comp.patchIntConst(v.Pos, &v.Value, &v.Ident, consts, nil) {162					values = append(values, v)163				}164			}165			n.Values = values166			top = append(top, n)167		case *ast.StrFlags:168			top = append(top, decl)169		case *ast.Resource, *ast.Struct, *ast.Call:170			// Walk whole tree and replace consts in Int's and Type's.171			missing := ""172			ast.WalkNode(decl, func(n0 ast.Node) {173				switch n := n0.(type) {174				case *ast.Int:175					comp.patchIntConst(n.Pos, &n.Value, &n.Ident, consts, &missing)176				case *ast.Type:177					if c := typeConstIdentifier(n); c != nil {178						comp.patchIntConst(c.Pos, &c.Value, &c.Ident,179							consts, &missing)180						if c.HasColon {181							comp.patchIntConst(c.Pos2, &c.Value2, &c.Ident2,182								consts, &missing)183						}184					}185				}186			})187			if missing == "" {188				top = append(top, decl)189				continue190			}191			// Produce a warning about unsupported syscall/resource/struct.192			// TODO(dvyukov): we should transitively remove everything that193			// depends on unsupported things.194			// Potentially we still can get, say, a bad int range error195			// due to the 0 const value.196			pos, typ, name := decl.Info()197			if id := typ + " " + name; !comp.unsupported[id] {198				comp.unsupported[id] = true199				comp.warning(pos, "unsupported %v: %v due to missing const %v",200					typ, name, missing)201			}202			// We have to keep partially broken resources and structs,203			// because otherwise their usages will error.204			top = append(top, decl)205			if c, ok := decl.(*ast.Call); ok {206				c.NR = ^uint64(0) // mark as unused to not generate it207			}208		}209	}210	comp.desc.Nodes = top211}212func (comp *compiler) patchIntConst(pos ast.Pos, val *uint64, id *string,213	consts map[string]uint64, missing *string) bool {214	if *id == "" {215		return true216	}217	v, ok := consts[*id]218	if !ok {219		name := "const " + *id220		if !comp.unsupported[name] {221			comp.unsupported[name] = true222			comp.warning(pos, "unsupported const: %v", *id)223		}224		if missing != nil && *missing == "" {225			*missing = *id226		}227	}228	*val = v229	*id = ""230	return ok231}232// typeConstIdentifier returns type arg that is an integer constant (subject for const patching), if any.233func typeConstIdentifier(n *ast.Type) *ast.Type {234	// TODO: see if we can extract this info from typeDesc/typeArg.235	if n.Ident == "const" && len(n.Args) > 0 {236		return n.Args[0]237	}238	if n.Ident == "array" && len(n.Args) > 1 && n.Args[1].Ident != "opt" {239		return n.Args[1]240	}241	if n.Ident == "vma" && len(n.Args) > 0 && n.Args[0].Ident != "opt" {242		return n.Args[0]243	}244	if n.Ident == "string" && len(n.Args) > 1 && n.Args[1].Ident != "opt" {245		return n.Args[1]246	}247	if n.Ident == "csum" && len(n.Args) > 2 && n.Args[1].Ident == "pseudo" {248		return n.Args[2]249	}250	switch n.Ident {251	case "int8", "int16", "int16be", "int32", "int32be", "int64", "int64be", "intptr":252		if len(n.Args) > 0 && n.Args[0].Ident != "opt" {253			return n.Args[0]254		}255	}256	return nil257}258func SerializeConsts(consts map[string]uint64) []byte {259	type nameValuePair struct {260		name string261		val  uint64262	}263	var nv []nameValuePair264	for k, v := range consts {265		nv = append(nv, nameValuePair{k, v})266	}267	sort.Slice(nv, func(i, j int) bool {268		return nv[i].name < nv[j].name269	})270	buf := new(bytes.Buffer)271	fmt.Fprintf(buf, "# AUTOGENERATED FILE\n")272	for _, x := range nv {273		fmt.Fprintf(buf, "%v = %v\n", x.name, x.val)274	}275	return buf.Bytes()276}277func DeserializeConsts(data []byte, file string, eh ast.ErrorHandler) map[string]uint64 {278	consts := make(map[string]uint64)279	pos := ast.Pos{280		File: file,281		Line: 1,282	}283	ok := true284	s := bufio.NewScanner(bytes.NewReader(data))285	for ; s.Scan(); pos.Line++ {286		line := s.Text()287		if line == "" || line[0] == '#' {288			continue289		}290		eq := strings.IndexByte(line, '=')291		if eq == -1 {292			eh(pos, "expect '='")293			ok = false294			continue295		}296		name := strings.TrimSpace(line[:eq])297		val, err := strconv.ParseUint(strings.TrimSpace(line[eq+1:]), 0, 64)298		if err != nil {299			eh(pos, fmt.Sprintf("failed to parse int: %v", err))300			ok = false301			continue302		}303		if _, ok := consts[name]; ok {304			eh(pos, fmt.Sprintf("duplicate const %q", name))305			ok = false306			continue307		}308		consts[name] = val309	}310	if err := s.Err(); err != nil {311		eh(pos, fmt.Sprintf("failed to parse: %v", err))312		ok = false313	}314	if !ok {315		return nil316	}317	return consts318}319func DeserializeConstsGlob(glob string, eh ast.ErrorHandler) map[string]uint64 {320	if eh == nil {321		eh = ast.LoggingHandler322	}323	files, err := filepath.Glob(glob)324	if err != nil {325		eh(ast.Pos{}, fmt.Sprintf("failed to find const files: %v", err))326		return nil327	}328	if len(files) == 0 {329		eh(ast.Pos{}, fmt.Sprintf("no const files matched by glob %q", glob))330		return nil331	}332	consts := make(map[string]uint64)333	for _, f := range files {334		data, err := ioutil.ReadFile(f)335		if err != nil {...

LoggingHandler

Using AI Code Generation

1import (2func main() {3	fset := token.NewFileSet()4	file, err := parser.ParseFile(fset, "log.go", nil, parser.ParseComments)5	if err != nil {6		log.Fatal(err)7	}8	ast.Print(fset, file)9	fmt.Println("----------------------------")10	f, err := os.Create("ast.txt")11	if err != nil {12		log.Fatal(err)13	}14	defer f.Close()15	ast.Fprint(f, fset, file, nil)16}

LoggingHandler

Using AI Code Generation

1import (2func main() {3	fileSet := token.NewFileSet()4	file, err := parser.ParseFile(fileSet, "1.go", nil, parser.ParseComments)5	if err != nil {6		log.Fatal(err)7	}8	ast.Inspect(file, func(n ast.Node) bool {9		switch x := n.(type) {10			fmt.Println(x.Name)11		}12	})13}14import (15func main() {16	fmt.Println("Hello World!")17}

LoggingHandler

Using AI Code Generation

1import (2func main() {3    logs.Trace("Trace message")4    logs.Debug("Debug message")5    logs.Info("Info message")6    logs.Warn("Warn message")7    logs.Error("Error message")8    logs.Critical("Critical message")9}10import (11func main() {12    logs.SetLogger(logs.AdapterConsole)13    logs.SetLogger(logs.AdapterFile, `{"filename":"test.log"}`)14    logs.Trace("Trace message")15    logs.Debug("Debug message")16    logs.Info("Info message")17    logs.Warn("Warn message")18    logs.Error("Error message")19    logs.Critical("Critical message")20}21import (22func main() {23    logs.SetLogger(logs.AdapterConsole)24    logs.SetLogger(logs.AdapterFile, `{"filename":"test.log"}`)

LoggingHandler

Using AI Code Generation

1func main() {2    logger := log.New(os.Stdout, "logger: ", log.Lshortfile)3    handler := LoggingHandler(logger)4    server := http.Server{5    }6    server.ListenAndServe()7}8func main() {9    logger := log.New(os.Stdout, "logger: ", log.Lshortfile)10    handler := LoggingHandler(logger)11    server := http.Server{12    }13    server.ListenAndServe()14}15func main() {16    logger := log.New(os.Stdout, "logger: ", log.Lshortfile)17    handler := LoggingHandler(logger)18    server := http.Server{19    }20    server.ListenAndServe()21}22func main() {23    logger := log.New(os.Stdout, "logger: ", log.Lshortfile)24    handler := LoggingHandler(logger)25    server := http.Server{26    }27    server.ListenAndServe()28}29func main() {30    logger := log.New(os.Stdout, "logger: ", log.Lshortfile)31    handler := LoggingHandler(logger)32    server := http.Server{33    }34    server.ListenAndServe()35}36func main() {

LoggingHandler

Using AI Code Generation

1import (2func main() {3	Ast := ast.NewAst()4	AstNode := ast.NewAstNode("AstNode")5	AstNode.AddChild(ast.NewAstNode("ChildNode"))6	AstNode.AddSibling(ast.NewAstNode("SiblingNode"))7	AstNode.AddParent(ast.NewAstNode("ParentNode"))8	AstNode.AddChild(ast.NewAstNode("ChildNode2"))9	AstNode.AddSibling(ast.NewAstNode("SiblingNode2"))10	AstNode.AddParent(ast.NewAstNode("ParentNode2"))11	AstNode.AddChild(ast.NewAstNode("ChildNode3"))12	AstNode.AddSibling(ast.NewAstNode("SiblingNode3"))13	AstNode.AddParent(ast.NewAstNode("ParentNode3"))14	AstNode.AddChild(ast.NewAstNode("ChildNode4"))15	AstNode.AddSibling(ast.NewAstNode("SiblingNode4"))16	AstNode.AddParent(ast.NewAstNode("ParentNode4"))17	AstNode.AddChild(ast.NewAstNode("ChildNode5"))18	AstNode.AddSibling(ast.NewAstNode("SiblingNode5"))19	AstNode.AddParent(ast.NewAstNode("ParentNode5"))20	AstNode.AddChild(ast.NewAstNode("ChildNode6"))21	AstNode.AddSibling(ast.NewAstNode("SiblingNode6"))22	AstNode.AddParent(ast.NewAstNode("ParentNode6"))

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