How to use extractProg method of repro Package

Best Syzkaller code snippet using repro.extractProg

repro.go

Source:repro.go

...172	reproStart := time.Now()173	defer func() {174		ctx.reproLog(3, "reproducing took %s", time.Since(reproStart))175	}()176	res, err := ctx.extractProg(entries)177	if err != nil {178		return nil, err179	}180	if res == nil {181		return nil, nil182	}183	defer func() {184		if res != nil {185			res.Opts.Repro = false186		}187	}()188	res, err = ctx.minimizeProg(res)189	if err != nil {190		return nil, err191	}192	// Try extracting C repro without simplifying options first.193	res, err = ctx.extractC(res)194	if err != nil {195		return nil, err196	}197	// Simplify options and try extracting C repro.198	if !res.CRepro {199		res, err = ctx.simplifyProg(res)200		if err != nil {201			return nil, err202		}203	}204	// Simplify C related options.205	if res.CRepro {206		res, err = ctx.simplifyC(res)207		if err != nil {208			return nil, err209		}210	}211	return res, nil212}213func (ctx *context) extractProg(entries []*prog.LogEntry) (*Result, error) {214	ctx.reproLog(2, "extracting reproducer from %v programs", len(entries))215	start := time.Now()216	defer func() {217		ctx.stats.ExtractProgTime = time.Since(start)218	}()219	// Extract last program on every proc.220	procs := make(map[int]int)221	for i, ent := range entries {222		procs[ent.Proc] = i223	}224	var indices []int225	for _, idx := range procs {226		indices = append(indices, idx)227	}228	sort.Ints(indices)229	var lastEntries []*prog.LogEntry230	for i := len(indices) - 1; i >= 0; i-- {231		lastEntries = append(lastEntries, entries[indices[i]])232	}233	// The shortest duration is 10 seconds to detect simple crashes (i.e. no races and no hangs).234	// The longest duration is 5 minutes to catch races and hangs. Note that this value must be larger235	// than hang/no output detection duration in vm.MonitorExecution, which is currently set to 3 mins.236	timeouts := []time.Duration{10 * time.Second, 1 * time.Minute, 5 * time.Minute}237	for _, timeout := range timeouts {238		// Execute each program separately to detect simple crashes caused by a single program.239		// Programs are executed in reverse order, usually the last program is the guilty one.240		res, err := ctx.extractProgSingle(reverseEntries(lastEntries), timeout)241		if err != nil {242			return nil, err243		}244		if res != nil {245			ctx.reproLog(3, "found reproducer with %d syscalls", len(res.Prog.Calls))246			return res, nil247		}248		// Don't try bisecting if there's only one entry.249		if len(entries) == 1 {250			continue251		}252		// Execute all programs and bisect the log to find multiple guilty programs.253		res, err = ctx.extractProgBisect(reverseEntries(entries), timeout)254		if err != nil {255			return nil, err256		}257		if res != nil {258			ctx.reproLog(3, "found reproducer with %d syscalls", len(res.Prog.Calls))259			return res, nil260		}261	}262	ctx.reproLog(0, "failed to extract reproducer")263	return nil, nil264}265func (ctx *context) createDefaultOps() csource.Options {266	opts := csource.Options{267		Threaded:      true,268		Collide:       true,269		Repeat:        true,270		Procs:         ctx.cfg.Procs,271		Sandbox:       ctx.cfg.Sandbox,272		EnableTun:     true,273		EnableCgroups: true,274		EnableNetdev:  true,275		ResetNet:      true,276		UseTmpDir:     true,277		HandleSegv:    true,278		WaitRepeat:    true,279		Repro:         true,280	}281	return opts282}283func (ctx *context) extractProgSingle(entries []*prog.LogEntry, duration time.Duration) (*Result, error) {284	ctx.reproLog(3, "single: executing %d programs separately with timeout %s", len(entries), duration)285	opts := ctx.createDefaultOps()286	for _, ent := range entries {287		opts.Fault = ent.Fault288		opts.FaultCall = ent.FaultCall289		opts.FaultNth = ent.FaultNth290		if opts.FaultCall < 0 || opts.FaultCall >= len(ent.P.Calls) {291			opts.FaultCall = len(ent.P.Calls) - 1292		}293		crashed, err := ctx.testProg(ent.P, duration, opts)294		if err != nil {295			return nil, err296		}297		if crashed {298			res := &Result{299				Prog:     ent.P,300				Duration: duration * 3 / 2,301				Opts:     opts,302			}303			ctx.reproLog(3, "single: successfully extracted reproducer")304			return res, nil305		}306	}307	ctx.reproLog(3, "single: failed to extract reproducer")308	return nil, nil309}310func (ctx *context) extractProgBisect(entries []*prog.LogEntry, baseDuration time.Duration) (*Result, error) {311	ctx.reproLog(3, "bisect: bisecting %d programs with base timeout %s", len(entries), baseDuration)312	opts := ctx.createDefaultOps()313	duration := func(entries int) time.Duration {314		return baseDuration + time.Duration((entries/4))*time.Second315	}316	// Bisect the log to find multiple guilty programs.317	entries, err := ctx.bisectProgs(entries, func(progs []*prog.LogEntry) (bool, error) {318		return ctx.testProgs(progs, duration(len(progs)), opts)319	})320	if err != nil {321		return nil, err322	}323	if len(entries) == 0 {324		return nil, nil...

extractProg

Using AI Code Generation

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

extractProg

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Println("vim-go")4}5import "fmt"6func main() {7    fmt.Println("vim-go")8}9import "fmt"10func main() {11    fmt.Println("vim-go")12}13import "fmt"14func main() {15    fmt.Println("vim-go")16}17import "fmt"18func main() {19    fmt.Println("vim-go")20}21import "fmt"22func main() {23    fmt.Println("vim-go")24}25import "fmt"26func main() {27    fmt.Println("vim-go")28}29import "fmt"30func main() {31    fmt.Println("vim-go")32}33import "fmt"34func main() {35    fmt.Println("vim-go")36}37import "fmt"38func main() {39    fmt.Println("vim-go")40}41import "fmt"42func main() {43    fmt.Println("vim-go")44}45import "fmt"46func main() {47    fmt.Println("vim-go")48}49import "fmt"50func main() {51    fmt.Println("vim-go")52}53import "fmt"54func main() {55    fmt.Println("vim-go

extractProg

Using AI Code Generation

1import (2func main() {3	if len(args) < 2 {4		fmt.Println("usage: go run 2.go <pid>")5		os.Exit(1)6	}7	pid, err := strconv.Atoi(args[1])8	if err != nil {9		fmt.Println("usage: go run 2.go <pid>")10		os.Exit(1)11	}12	p := repro{}13	p.extractProg(pid)14}15type repro struct {16}17func (r repro) extractProg(pid int) {18	cmd := exec.Command("ps", "-p", strconv.Itoa(pid), "-o", "comm=")19	out, err := cmd.Output()20	if err != nil {21		fmt.Println(err)22		os.Exit(1)23	}24	fmt.Println("Program name: ", strings.TrimSpace(string(out)))25}26import (27func main() {28	if len(args) < 2 {29		fmt.Println("usage: go run 3.go <pid>")30		os.Exit(1)31	}32	pid, err := strconv.Atoi(args[1])33	if err != nil {34		fmt.Println("usage: go run 3.go <pid>")35		os.Exit(1)36	}37	p := repro{}38	p.extractProg(pid)39}40type repro struct {41}42func (r repro) extractProg(pid int) {43	cmd := exec.Command("ps", "-p", strconv.Itoa(pid), "-o", "comm=")44	out, err := cmd.Output()45	if err != nil {46		fmt.Println(err)47		os.Exit(1)48	}49	fmt.Println("Program name: ", strings.TrimSpace(string(out)))50}51import (52func main() {53	if len(args) < 2 {

extractProg

Using AI Code Generation

1import (2type Repro struct {3}4func main() {5	repro.prog = "package main\nimport \"fmt\"\nfunc main() {fmt.Printf(\"Hello, world\")}"6	fmt.Println(repro.extractProg())7}8func (r Repro) extractProg() string {9	prog = strings.Replace(prog, "package main", "", 1)10	prog = strings.Replace(prog, "import \"fmt\"", "", 1)11	prog = strings.Replace(prog, "func main()", "", 1)12	prog = strings.Replace(prog, "{", "", 1)13	prog = strings.Replace(prog, "}", "", 1)14	prog = strings.Replace(prog, "fmt.Printf(\"Hello, world\")", "", 1)15	prog = strings.Replace(prog, "16	prog = strings.Replace(prog, " ", "", -1)17}18import (19type Repro struct {20}21func main() {22	repro.prog = "package main\nimport \"fmt\"\nfunc main() {fmt.Printf(\"Hello, world\")}"23	fmt.Println(repro.extractProg())24}25func (r Repro) extractProg() string {26	prog = strings.Replace(prog, "package main", "", 1)27	prog = strings.Replace(prog, "import \"fmt\"", "", 1)28	prog = strings.Replace(prog, "func main()", "", 1)29	prog = strings.Replace(prog, "{", "", 1)

extractProg

Using AI Code Generation

1import (2func main() {3	goPath, err := exec.LookPath("go")4	if err != nil {5		fmt.Println("Unable to find go executable")6		os.Exit(1)7	}8	_, filename, _, ok := runtime.Caller(0)9	if !ok {10		fmt.Println("Unable to get the path to the current file")11		os.Exit(1)12	}13	goFolder := filepath.Dir(goPath)14	goRoot := filepath.Dir(goFolder)15	goSrc := filepath.Join(goRoot, "src")16	currentFolder := filepath.Dir(filename)17	currentFile := filepath.Base(filename)18	currentFileWithoutExtension := currentFile[:len(currentFile)-len(filepath.Ext(currentFile))]19	currentFolder = filepath.Dir(filename)20	currentFile = filepath.Base(filename)21	currentFileWithoutExtension = currentFile[:len(currentFile)-len(filepath.Ext(currentFile))]22	currentFolder = filepath.Dir(filename)23	currentFile = filepath.Base(filename)24	currentFileWithoutExtension = currentFile[:len(currentFile)-len(filepath.Ext(currentFile))]25	currentFolder = filepath.Dir(filename)26	currentFile = filepath.Base(filename)27	currentFileWithoutExtension = currentFile[:len(currentFile)-len(filepath.Ext(currentFile))]28	currentFolder = filepath.Dir(filename)29	currentFile = filepath.Base(filename)

extractProg

Using AI Code Generation

1import (2func main() {3	fmt.Printf("Hello World4	r := repro.NewRepro()5	r.ExtractProg()6}7import (8func main() {9	fmt.Printf("Hello World10	r := repro.NewRepro()11	r.ExtractProg()12}13import (14type Repro struct {15}16func NewRepro() *Repro {17	return &Repro{}18}19func (r *Repro) ExtractProg() {20	_, progname, _, _ := runtime.Caller(0)21	fmt.Printf("progname = %s22	_, filename, _, _ := runtime.Caller(1)23	fmt.Printf("filename = %s24	_, filename, _, _ := runtime.Caller(2)25	fmt.Printf("filename = %s26	_, filename, _, _ := runtime.Caller(3)27	fmt.Printf("filename = %s28	_, filename, _, _ := runtime.Caller(4)29	fmt.Printf("filename = %s30	_, filename, _, _ := runtime.Caller(5)31	fmt.Printf("filename = %s32	_, filename, _, _ := runtime.Caller(6)33	fmt.Printf("filename = %s34	_, filename, _, _ := runtime.Caller(7)35	fmt.Printf("filename = %s36	_, filename, _, _ := runtime.Caller(8)37	fmt.Printf("filename = %s38	_, filename, _, _ := runtime.Caller(9)39	fmt.Printf("filename = %s

extractProg

Using AI Code Generation

1import (2func isComment(line string) bool {3	if strings.HasPrefix(line, ";") {4	}5	if strings.HasPrefix(line, ";;") {6	}7	if strings.TrimSpace(line) == "" {8	}9}10func isLabel(line string) bool {11	if strings.HasPrefix(line, ":") {12	}13}14func isDirective(line string) bool {15	if strings.HasPrefix(line, ".") {16	}17}18func isInstruction(line string) bool {19	if strings.HasPrefix(line, "\t") {20	}21}22func extractProg(file *os.File) []string {23	scanner := bufio.NewScanner(file)24	for scanner.Scan() {25		line := scanner.Text()26		if isComment(line) || isLabel(line) || isDirective(line) || isInstruction(line) {27			prog = append(prog, line)28		} else {29			fmt.Println("Error: line " + strconv.Itoa(lineNum) + " is not valid")30			os.Exit(1)

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