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How to use extractProgBisect method of repro Package

Best Syzkaller code snippet using repro.extractProgBisect

repro.go

Source:repro.go

...297		ctx.stats.ExtractProgTime = time.Since(start)298	}()299	// Extract last program on every proc.300	//è¿åå¼æ¯è½è§¦åcrashçåä¸ªprogramæèè½è§¦åcrashçprogramsçç»å301	//extractProgBisect()çå®ç°ï¼åè°ç¨bisectProgs()è¿è¡åç»ï¼çåªä¸ç»å¯ä»¥è§¦åcrashã302	procs := make(map[int]int)303	for i, ent := range entries {304		procs[ent.Proc] = i305	}306	var indices []int307	for _, idx := range procs {308		indices = append(indices, idx)309	}310	sort.Ints(indices)311	//é¦åï¼å¨ææprogram(ç¨entriesæ°ç»è¡¨ç¤º)æååºæ¯ä¸ªprocææ§è¡çæåä¸ä¸ªprogramï¼312	//å¹¶ææ§è¡ååååºæåï¼åæ¾å°lastEntriesæ°ç»ä¸ã313	var lastEntries []*prog.LogEntry314	for i := len(indices) - 1; i >= 0; i-- {315		lastEntries = append(lastEntries, entries[indices[i]])316	}317	//å¶æ¬¡ï¼è°ç¨extractProgSingle()ååºæ§è¡æ¯ä¸ä¸ªprogramï¼å¦æresä¸ä¸ºç©ºï¼è¿å318	for _, timeout := range ctx.testTimeouts {319		// Execute each program separately to detect simple crashes caused by a single program.320		// Programs are executed in reverse order, usually the last program is the guilty one.321		//322		res, err := ctx.extractProgSingle(lastEntries, timeout)323		if err != nil {324			return nil, err325		}326		if res != nil {327			ctx.reproLogf(3, "found reproducer with %d syscalls", len(res.Prog.Calls))328			return res, nil329		}330		// Don't try bisecting if there's only one entry.331		if len(entries) == 1 {332			continue333		}334		// Execute all programs and bisect the log to find multiple guilty programs.335		//å¦æåä¸ªç¨åºæ æ³å¤ç°ï¼éç¨äºåçæ¹æ³æ¾å°é£äºè§¦åcrashçç¨åº336		//æåï¼å³åä¸ªç¨åºä¸ä¼å¼èµ·crashï¼ï¼è°ç¨extractProgBisect()æµè¯åªå ä¸ªprogramä¸èµ·è§¦åäºcrash337		res, err = ctx.extractProgBisect(entries, timeout)338		if err != nil {339			return nil, err340		}341		if res != nil {342			ctx.reproLogf(3, "found reproducer with %d syscalls", len(res.Prog.Calls))343			return res, nil344		}345	}346	ctx.reproLogf(0, "failed to extract reproducer")347	return nil, nil348}349func (ctx *context) extractProgSingle(entries []*prog.LogEntry, duration time.Duration) (*Result, error) {350	ctx.reproLogf(3, "single: executing %d programs separately with timeout %s", len(entries), duration)351	opts := ctx.startOpts352	for _, ent := range entries {353		crashed, err := ctx.testProg(ent.P, duration, opts)354		if err != nil {355			return nil, err356		}357		if crashed {358			res := &Result{359				Prog:     ent.P,360				Duration: duration * 3 / 2,361				Opts:     opts,362			}363			ctx.reproLogf(3, "single: successfully extracted reproducer")364			return res, nil365		}366	}367	ctx.reproLogf(3, "single: failed to extract reproducer")368	return nil, nil369}370func (ctx *context) extractProgBisect(entries []*prog.LogEntry, baseDuration time.Duration) (*Result, error) {371	ctx.reproLogf(3, "bisect: bisecting %d programs with base timeout %s", len(entries), baseDuration)372	opts := ctx.startOpts373	duration := func(entries int) time.Duration {374		return baseDuration + time.Duration(entries/4)*time.Second375	}376	// Bisect the log to find multiple guilty programs.377	entries, err := ctx.bisectProgs(entries, func(progs []*prog.LogEntry) (bool, error) {378		return ctx.testProgs(progs, duration(len(progs)), opts)379	})380	if err != nil {381		return nil, err382	}383	if len(entries) == 0 {384		return nil, nil...

extractProgBisect

Using AI Code Generation

1import (2func main() {3    var (4        logFile = file.Abs("bisect.log")5        r       = bisect.NewRepro(logFile)6    defer r.Close()7    log.I(r.Ctx, "Log file: %s", logFile)8    log.I(r.Ctx, "Bisect result: %v", r.BisectResult())9    log.I(r.Ctx, "Bisect log:")10    fmt.Println(r.BisectLog())11}12import (13func main() {14    var (15        logFile = file.Abs("bisect.log")16        r       = bisect.NewRepro(logFile)17    defer r.Close()18    log.I(r.Ctx, "Log file: %s", logFile)19    log.I(r.Ctx, "Bisect result: %v", r.BisectResult())20    log.I(r.Ctx, "Bisect log:")21    fmt.Println(r.BisectLog())22}

extractProgBisect

Using AI Code Generation

1import (2func main() {3	r, err := repro.New(nil, nil)4	if err != nil {5		fmt.Println("Error in creating new repro object")6	}7	b, err := repro.NewBisect(nil, nil)8	if err != nil {9		fmt.Println("Error in creating new bisect object")10	}11	vcs, err := vcs.New("git", "/home/raghav/go/src/github.com/google/syzkaller", nil)12	if err != nil {13		fmt.Println("Error in creating new vcs object")14	}15	r, err = repro.New(vcs, b)16	if err != nil {17		fmt.Println("Error in creating new repro object")18	}19	b, err = repro.NewBisect(vcs, r)20	if err != nil {21		fmt.Println("Error in creating new bisect object")22	}

extractProgBisect

Using AI Code Generation

1import (2func main() {3	target, err := prog.GetTarget(sys.GitHubOS, sys.GitHubArch)4	if err != nil {5		panic(err)6	}7	r := repro.New(target, nil)8	p := target.MakeProg()9	r.ExtractProgBisect(p, 0)10}

extractProgBisect

Using AI Code Generation

1import (2func main() {3	const (4	cfg := repro.Config{5	}6	logFile, err := os.Create("log.txt")7	if err != nil {8		fmt.Println("Error creating log file")9	}10	defer logFile.Close()11	log.SetOutput(logFile)12	r := repro.New(cfg)13	prog, err := r.ExtractProgBisect(vmID, "/home/akshay/syzkaller/crashes/1/1")14	if err != nil {15		fmt.Println("Error extracting program")16	}17	fmt.Println(prog)18}

extractProgBisect

Using AI Code Generation

1import (2func main() {3	if len(os.Args) != 2 {4		fmt.Fprintln(os.Stderr, "usage: extract <bugreport>")5		os.Exit(1)6	}7	rep, err := repro.LoadBugReport(bugreport)8	if err != nil {9		log.Fatalf("Could not load bug report: %v", err)10	}11	prog, err := rep.ExtractProgBisect()12	if err != nil {13		log.Fatalf("Could not extract program: %v", err)14	}15	fmt.Println(prog)16}17import (18func main() {19	if len(os.Args) != 2 {20		fmt.Fprintln(os.Stderr, "usage: extract <bugreport>")21		os.Exit(1)22	}23	rep, err := repro.LoadBugReport(bugreport)24	if err != nil {25		log.Fatalf("Could not load bug report: %v", err)26	}27	prog, err := rep.ExtractProgBisect()28	if err != nil {29		log.Fatalf("Could not extract program: %v", err)30	}31	fmt.Println(prog)32}33import (

extractProgBisect

Using AI Code Generation

1import (2type repro struct {3}4func main() {5	r := repro{6	}7	r.extractProgBisect()8	r.bisect()9}10func (r repro) extractProgBisect() {11	progFile, err := os.Open(r.progName)12	if err != nil {13		log.Fatal(err)14	}15	defer progFile.Close()16	progBisectFile, err := os.Create("progBisect.go")17	if err != nil {18		log.Fatal(err)19	}20	defer progBisectFile.Close()21	progReader := bufio.NewReader(progFile)22	progBisectWriter := bufio.NewWriter(progBisectFile)23	prog, err := progReader.ReadString('}')24	if err != nil {25		log.Fatal(err)26	}27	progBisectWriter.WriteString(prog)28	progBisectWriter.Flush()29}30func (r repro) bisect() {31	cmd := exec.Command("git", "bisect", "run", "go", "run", r.bugName+".go")32	cmdReader, err := cmd.StdoutPipe()33	if err != nil {34		log.Fatal(err)35	}36	cmdScanner := bufio.NewScanner(cmdReader)37	if err := cmd.Start(); err != nil {38		log.Fatal(err)

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