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How to use NewConstFile method of compiler Package

Best Syzkaller code snippet using compiler.NewConstFile

const_file.go

Source:const_file.go

...22	name string23	vals map[string]uint64 // arch -> value24}25const undefined = "???"26func NewConstFile() *ConstFile {27	return &ConstFile{28		arches: make(map[string]bool),29		m:      make(map[string]constVal),30	}31}32func (cf *ConstFile) AddArch(arch string, consts map[string]uint64, undeclared map[string]bool) error {33	cf.arches[arch] = true34	for name, val := range consts {35		if err := cf.addConst(arch, name, val, true); err != nil {36			return err37		}38	}39	for name := range undeclared {40		if err := cf.addConst(arch, name, 0, false); err != nil {41			return err42		}43	}44	return nil45}46func (cf *ConstFile) addConst(arch, name string, val uint64, declared bool) error {47	cv := cf.m[name]48	if cv.vals == nil {49		cv.name = name50		cv.vals = make(map[string]uint64)51	}52	if val0, declared0 := cv.vals[arch]; declared && declared0 && val != val0 {53		return fmt.Errorf("const=%v arch=%v has different values: %v[%v] vs %v[%v]",54			name, arch, val, declared, val0, declared0)55	}56	if declared {57		cv.vals[arch] = val58	}59	cf.m[name] = cv60	return nil61}62func (cf *ConstFile) Arch(arch string) map[string]uint64 {63	if cf == nil {64		return nil65	}66	m := make(map[string]uint64)67	for name, cv := range cf.m {68		if v, ok := cv.vals[arch]; ok {69			m[name] = v70		}71	}72	return m73}74func (cf *ConstFile) Serialize() []byte {75	if len(cf.arches) == 0 {76		return nil77	}78	var arches []string79	for arch := range cf.arches {80		arches = append(arches, arch)81	}82	sort.Strings(arches)83	var consts []constVal84	for _, cv := range cf.m {85		consts = append(consts, cv)86	}87	sort.Slice(consts, func(i, j int) bool {88		return consts[i].name < consts[j].name89	})90	buf := new(bytes.Buffer)91	fmt.Fprintf(buf, "# Code generated by syz-sysgen. DO NOT EDIT.\n")92	fmt.Fprintf(buf, "arches = %v\n", strings.Join(arches, ", "))93	for _, cv := range consts {94		fmt.Fprintf(buf, "%v = ", cv.name)95		if len(cv.vals) == 0 {96			// Undefined for all arches.97			fmt.Fprintf(buf, "%v\n", undefined)98			continue99		}100		count := make(map[uint64]int)101		max, dflt := 0, uint64(0)102		for _, val := range cv.vals {103			count[val]++104			if count[val] > 1 && (count[val] > max || count[val] == max && val < dflt) {105				max, dflt = count[val], val106			}107		}108		if max != 0 {109			// Have a default value.110			fmt.Fprintf(buf, "%v", dflt)111		}112		handled := make([]bool, len(arches))113		for i, arch := range arches {114			val, ok := cv.vals[arch]115			if ok && val == dflt || handled[i] {116				// Default value or serialized on a previous iteration.117				continue118			}119			if i != 0 || max != 0 {120				fmt.Fprintf(buf, ", ")121			}122			fmt.Fprintf(buf, "%v:", arch)123			for j := i + 1; j < len(arches); j++ {124				// Add more arches with the same value.125				arch1 := arches[j]126				val1, ok1 := cv.vals[arch1]127				if ok1 == ok && val1 == val {128					fmt.Fprintf(buf, "%v:", arch1)129					handled[j] = true130				}131			}132			if ok {133				fmt.Fprintf(buf, "%v", val)134			} else {135				fmt.Fprint(buf, undefined)136			}137		}138		fmt.Fprintf(buf, "\n")139	}140	return buf.Bytes()141}142func DeserializeConstFile(glob string, eh ast.ErrorHandler) *ConstFile {143	if eh == nil {144		eh = ast.LoggingHandler145	}146	files, err := filepath.Glob(glob)147	if err != nil {148		eh(ast.Pos{}, fmt.Sprintf("failed to find const files: %v", err))149		return nil150	}151	if len(files) == 0 {152		eh(ast.Pos{}, fmt.Sprintf("no const files matched by glob %q", glob))153		return nil154	}155	cf := NewConstFile()156	oldFormat := regexp.MustCompile(`_([a-z0-9]+)\.const$`)157	for _, f := range files {158		data, err := ioutil.ReadFile(f)159		if err != nil {160			eh(ast.Pos{}, fmt.Sprintf("failed to read const file: %v", err))161			return nil162		}163		// Support for old per-arch format.164		// Remove it once we don't have any *_arch.const files anymore.165		arch := ""166		if match := oldFormat.FindStringSubmatch(f); match != nil {167			arch = match[1]168		}169		if !cf.deserializeFile(data, filepath.Base(f), arch, eh) {...

const_file_test.go

Source:const_file_test.go

...77CONST3_SOME_UNDEFINED = arch1:100, arch2:arch3:???78CONST4_ALL_UNDEFINED = ???79CONST5_SOME_UNDEFINED2 = 100, arch3:???80`81	cf := NewConstFile()82	for name, arch := range arches {83		cf.AddArch(name, arch.consts, arch.undefined)84	}85	data := cf.Serialize()86	if diff := cmp.Diff(serialized, string(data)); diff != "" {87		t.Fatal(diff)88	}89	{90		file, err := ioutil.TempFile("", "syz-const")91		if err != nil {92			t.Fatal(err)93		}94		defer file.Close()95		defer os.Remove(file.Name())...

NewConstFile

Using AI Code Generation

1import (2func main() {3	fset := token.NewFileSet()4	f, err := parser.ParseFile(fset, "2.go", nil, parser.ParseComments)5	if err != nil {6		fmt.Println(err)7		os.Exit(1)8	}9	fset2 := token.NewFileSet()10	f2 := fset2.AddFile(f.Name.Name+".go", fset2.Base(), len(f.Bytes()))11	ast.FileExports(f2, f)12	ast.Print(fset2, f2)13}

NewConstFile

Using AI Code Generation

1import (2func main() {3	f, err := parser.ParseFile(fset, "1.go", nil, parser.ImportsOnly)4	if err != nil {5		fmt.Println(err)6	}7	fmt.Println("imports:")8	for _, s := range f.Imports {9		fmt.Println(s.Path.Value)10	}11	fmt.Println("decls:")12	for _, s := range f.Decls {13		fmt.Println(s)14	}15	fmt.Println("comments:")16	for _, s := range f.Comments {17		fmt.Println(s)18	}19	fmt.Println("scope:")20	fmt.Println(f.Scope)21	fmt.Println("unresolved:")22	fmt.Println(f.Unresolved)23	fmt.Println("name:")24	fmt.Println(f.Name)25	fmt.Println("doc:")26	fmt.Println(f.Doc)27	fmt.Println("package:")28	fmt.Println(f.Package)29	fmt.Println("complete:")30	fmt.Println(f.Complete)31	fmt.Println("scope:")32	fmt.Println(f.Scope)33	fmt.Println("unresolved:")34	fmt.Println(f.Unresolved)35	fmt.Println("scope:")36	fmt.Println(f.Scope)37	fmt.Println("unresolved:")38	fmt.Println(f.Unresolved)39	fmt.Println("scope:")40	fmt.Println(f.Scope)41	fmt.Println("unresolved:")42	fmt.Println(f.Unresolved)43	fmt.Println("scope:")44	fmt.Println(f.Scope)45	fmt.Println("un

NewConstFile

Using AI Code Generation

1import (2func main() {3	f, err := parser.ParseFile(fset, "2.go", nil, parser.ImportsOnly)4	if err != nil {5		log.Fatal(err)6	}7	for _, s := range f.Imports {8		fmt.Println(s.Path.Value)9	}10	fset = token.NewFileSet()11	file := fset.AddFile("hello.go", fset.Base(), len(src))12	f, err = parser.ParseFile(fset, "hello.go", src, parser.ImportsOnly)13	if err != nil {14		log.Fatal(err)15	}16	for _, s := range f.Imports {17		fmt.Println(s.Path.Value)18	}19}20var src = []byte(`21import "fmt"22func main() {23	fmt.Println("Hello, 世界")24}

NewConstFile

Using AI Code Generation

1import (2func main() {3	fset := token.NewFileSet()4	file, err := parser.ParseFile(fset, "2.go", nil, 0)5	if err != nil {6		fmt.Println("Error in parsing file")7	}8	conf := loader.Config{9		TypeCheckFuncBodies: func(path string) bool {10		},11		TypeChecker: types.Config{12		},13	}14	prog, err := conf.Load()15	if err != nil {16		fmt.Println("Error in loading config")17	}18	compiler := prog.CreateFromFiles(build.Default, fset, file)19	constant := compiler.NewConst("x", types.Typ[types.Int], 5)20	decl := &ast.GenDecl{21		Specs: []ast.Spec{22			&ast.ValueSpec{23				Names: []*ast.Ident{ast.NewIdent("x")},24				Type:  ast.NewIdent("int"),25				Values: []ast.Expr{26					&ast.BasicLit{27					},28				},29			},30		},31	}32	file1 := compiler.NewConstFile("x.go", decl)33	fmt.Println(file1)34}

NewConstFile

Using AI Code Generation

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

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