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How to use simplifyProg method of repro Package

Best Syzkaller code snippet using repro.simplifyProg

repro.go

Source:repro.go

...186		return nil, err187	}188	// Simplify options and try extracting C repro.189	if !res.CRepro {190		res, err = ctx.simplifyProg(res)191		if err != nil {192			return nil, err193		}194	}195	// Simplify C related options.196	if res.CRepro {197		res, err = ctx.simplifyC(res)198		if err != nil {199			return nil, err200		}201	}202	return res, nil203}204func (ctx *context) extractProg(entries []*prog.LogEntry) (*Result, error) {205	ctx.reproLog(2, "extracting reproducer from %v programs", len(entries))206	start := time.Now()207	defer func() {208		ctx.stats.ExtractProgTime = time.Since(start)209	}()210	// Extract last program on every proc.211	procs := make(map[int]int)212	for i, ent := range entries {213		procs[ent.Proc] = i214	}215	var indices []int216	for _, idx := range procs {217		indices = append(indices, idx)218	}219	sort.Ints(indices)220	var lastEntries []*prog.LogEntry221	for i := len(indices) - 1; i >= 0; i-- {222		lastEntries = append(lastEntries, entries[indices[i]])223	}224	// The shortest duration is 10 seconds to detect simple crashes (i.e. no races and no hangs).225	// The longest duration is 5 minutes to catch races and hangs. Note that this value must be larger226	// than hang/no output detection duration in vm.MonitorExecution, which is currently set to 3 mins.227	timeouts := []time.Duration{10 * time.Second, 1 * time.Minute, 5 * time.Minute}228	for _, timeout := range timeouts {229		// Execute each program separately to detect simple crashes caused by a single program.230		// Programs are executed in reverse order, usually the last program is the guilty one.231		res, err := ctx.extractProgSingle(reverseEntries(lastEntries), timeout)232		if err != nil {233			return nil, err234		}235		if res != nil {236			ctx.reproLog(3, "found reproducer with %d syscalls", len(res.Prog.Calls))237			return res, nil238		}239		// Don't try bisecting if there's only one entry.240		if len(entries) == 1 {241			continue242		}243		// Execute all programs and bisect the log to find multiple guilty programs.244		res, err = ctx.extractProgBisect(reverseEntries(entries), timeout)245		if err != nil {246			return nil, err247		}248		if res != nil {249			ctx.reproLog(3, "found reproducer with %d syscalls", len(res.Prog.Calls))250			return res, nil251		}252	}253	ctx.reproLog(0, "failed to extract reproducer")254	return nil, nil255}256func (ctx *context) createDefaultOps() csource.Options {257	opts := csource.Options{258		Threaded:   true,259		Collide:    true,260		Repeat:     true,261		Procs:      ctx.cfg.Procs,262		Sandbox:    ctx.cfg.Sandbox,263		EnableTun:  true,264		UseTmpDir:  true,265		HandleSegv: true,266		WaitRepeat: true,267		Repro:      true,268	}269	return opts270}271func (ctx *context) extractProgSingle(entries []*prog.LogEntry, duration time.Duration) (*Result, error) {272	ctx.reproLog(3, "single: executing %d programs separately with timeout %s", len(entries), duration)273	opts := ctx.createDefaultOps()274	for _, ent := range entries {275		opts.Fault = ent.Fault276		opts.FaultCall = ent.FaultCall277		opts.FaultNth = ent.FaultNth278		if opts.FaultCall < 0 || opts.FaultCall >= len(ent.P.Calls) {279			opts.FaultCall = len(ent.P.Calls) - 1280		}281		crashed, err := ctx.testProg(ent.P, duration, opts)282		if err != nil {283			return nil, err284		}285		if crashed {286			res := &Result{287				Prog:     ent.P,288				Duration: duration * 3 / 2,289				Opts:     opts,290			}291			ctx.reproLog(3, "single: successfully extracted reproducer")292			return res, nil293		}294	}295	ctx.reproLog(3, "single: failed to extract reproducer")296	return nil, nil297}298func (ctx *context) extractProgBisect(entries []*prog.LogEntry, baseDuration time.Duration) (*Result, error) {299	ctx.reproLog(3, "bisect: bisecting %d programs with base timeout %s", len(entries), baseDuration)300	opts := ctx.createDefaultOps()301	duration := func(entries int) time.Duration {302		return baseDuration + time.Duration((entries/4))*time.Second303	}304	// Bisect the log to find multiple guilty programs.305	entries, err := ctx.bisectProgs(entries, func(progs []*prog.LogEntry) (bool, error) {306		return ctx.testProgs(progs, duration(len(progs)), opts)307	})308	if err != nil {309		return nil, err310	}311	if len(entries) == 0 {312		return nil, nil313	}314	// TODO: Minimize each program before concatenation.315	// TODO: Return multiple programs if concatenation fails.316	ctx.reproLog(3, "bisect: %d programs left: \n\n%s\n", len(entries), encodeEntries(entries))317	ctx.reproLog(3, "bisect: trying to concatenate")318	// Concatenate all programs into one.319	prog := &prog.Prog{320		Target: entries[0].P.Target,321	}322	for _, entry := range entries {323		prog.Calls = append(prog.Calls, entry.P.Calls...)324	}325	dur := duration(len(entries)) * 3 / 2326	// Execute the program without fault injection.327	crashed, err := ctx.testProg(prog, dur, opts)328	if err != nil {329		return nil, err330	}331	if crashed {332		res := &Result{333			Prog:     prog,334			Duration: dur,335			Opts:     opts,336		}337		ctx.reproLog(3, "bisect: concatenation succeded")338		return res, nil339	}340	// Try with fault injection.341	calls := 0342	for _, entry := range entries {343		if entry.Fault {344			opts.FaultCall = calls + entry.FaultCall345			opts.FaultNth = entry.FaultNth346			if entry.FaultCall < 0 || entry.FaultCall >= len(entry.P.Calls) {347				opts.FaultCall = calls + len(entry.P.Calls) - 1348			}349			crashed, err := ctx.testProg(prog, dur, opts)350			if err != nil {351				return nil, err352			}353			if crashed {354				res := &Result{355					Prog:     prog,356					Duration: dur,357					Opts:     opts,358				}359				ctx.reproLog(3, "bisect: concatenation succeeded with fault injection")360				return res, nil361			}362		}363		calls += len(entry.P.Calls)364	}365	ctx.reproLog(3, "bisect: concatenation failed")366	return nil, nil367}368// Minimize calls and arguments.369func (ctx *context) minimizeProg(res *Result) (*Result, error) {370	ctx.reproLog(2, "minimizing guilty program")371	start := time.Now()372	defer func() {373		ctx.stats.MinimizeProgTime = time.Since(start)374	}()375	call := -1376	if res.Opts.Fault {377		call = res.Opts.FaultCall378	}379	res.Prog, res.Opts.FaultCall = prog.Minimize(res.Prog, call, func(p1 *prog.Prog, callIndex int) bool {380		crashed, err := ctx.testProg(p1, res.Duration, res.Opts)381		if err != nil {382			ctx.reproLog(0, "minimization failed with %v", err)383			return false384		}385		return crashed386	}, true)387	return res, nil388}389// Simplify repro options (threaded, collide, sandbox, etc).390func (ctx *context) simplifyProg(res *Result) (*Result, error) {391	ctx.reproLog(2, "simplifying guilty program")392	start := time.Now()393	defer func() {394		ctx.stats.SimplifyProgTime = time.Since(start)395	}()396	for _, simplify := range progSimplifies {397		opts := res.Opts398		if simplify(&opts) {399			crashed, err := ctx.testProg(res.Prog, res.Duration, opts)400			if err != nil {401				return nil, err402			}403			if crashed {404				res.Opts = opts...

simplifyProg

Using AI Code Generation

1import (2func main() {3	m := ir.NewModule()4	main := m.NewFunc("main", types.I32)5	entry := main.NewBlock("entry")6	zero := constant.NewInt(types.I32, 0)7	one := constant.NewInt(types.I32, 1)8	two := constant.NewInt(types.I32, 2)9	three := constant.NewInt(types.I32, 3)10	four := constant.NewInt(types.I32, 4)11	five := constant.NewInt(types.I32, 5)12	six := constant.NewInt(types.I32, 6)13	seven := constant.NewInt(types.I32, 7)14	eight := constant.NewInt(types.I32, 8)15	nine := constant.NewInt(types.I32, 9)16	ten := constant.NewInt(types.I32, 10)

simplifyProg

Using AI Code Generation

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

simplifyProg

Using AI Code Generation

1import (2type repro struct {3}4func (r repro) simplifyProg() {5	ast.Inspect(r.prog, func(n ast.Node) bool {6		switch x := n.(type) {7			if fn, ok := x.Fun.(*ast.SelectorExpr); ok {8				fmt.Printf("%#v\n", fn)9				if id, ok := fn.X.(*ast.Ident); ok {10					fmt.Printf("%#v\n", id)11					if id.Name == "fmt" && fn.Sel.Name == "Println" {12						fmt.Println("found")13					}14				}15			}16		}17	})18}19func main() {20import "fmt"21func main() {22	fmt.Println("Hello, playground")23}24	fset := token.NewFileSet()25	f, err := parser.ParseFile(fset, "", src, 0)26	if err != nil {27		log.Fatal(err)28	}29	r := repro{f}30	r.simplifyProg()31}

simplifyProg

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello, playground")4	repro.SimplifyProg()5}6import (7func SimplifyProg() {8	var re = regexp.MustCompile(`(?i)^\s*([a-z0-9_]+)\s*=\s*([a-z0-9_]+)\s*$`)9	fmt.Println(re)10}

simplifyProg

Using AI Code Generation

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

simplifyProg

Using AI Code Generation

1import (2func main() {3    vm := otto.New()4    vm.Set("repro", repro{})5    vm.Run(`6        var repro = new repro();7        repro.simplifyProg(function(a) { return a; });8}9type repro struct{}10func (repro) simplifyProg(fn interface{}) {11    fmt.Println(fn)12}13(function(a) { return a; })14function (a) { return a; }15type repro struct {16}17func (repro) simplifyProg(fn interface{}) {18    fmt.Println(fn)19}20type repro struct {21}22func (repro) simplifyProg(fn interface{}) {23    fmt.Println(fn)24}25type repro struct {26}27func (repro) simplifyProg(fn interface{}) {28    fmt.Println(fn)29}30type repro struct {31}32func (repro) simplifyProg(fn interface{}) {33    fmt.Println(fn)34}

simplifyProg

Using AI Code Generation

1import (2type Repro struct {3}4func (r *Repro) simplifyProg() {5}6func main() {7    r := &Repro{x: 0, y: 0}8    r.simplifyProg()9    fmt.Printf("x: %d, y: %d\n", r.x, r.y)10}11import (12type Repro struct {13}14func (r *Repro) simplifyProg() {15}16func main() {17    r := &Repro{x: 0, y: 0}18    r.simplifyProg()19    fmt.Printf("x: %d, y: %d\n", r.x, r.y)20}21import (22type Repro struct {23}24func (r *Repro) simplifyProg() {25}26func main() {27    r := &Repro{x: 0, y: 0}28    r.simplifyProg()29    fmt.Printf("x: %d, y: %d\n", r.x, r.y)30}31import (32type Repro struct {33}34func (r *Repro) simplifyProg() {35}36func main() {37    r := &Repro{x: 0, y: 0}38    r.simplifyProg()39    fmt.Printf("x: %d, y: %d\n", r.x, r.y)40}

simplifyProg

Using AI Code Generation

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

simplifyProg

Using AI Code Generation

1import (2func main() {3	r := NewRepro()4	fset := token.NewFileSet()5	f, err := parser.ParseFile(fset, "1.go", nil, 0)6	if err != nil {7		log.Fatal(err)8	}9	conf := types.Config{10		Importer: r.importer,11	}12	_, err = conf.Check("main", fset, []*ast.File{f}, nil)13	if err != nil {14		log.Fatal(err)15	}16	functions := r.getFunctions(fset, f)17	calls := r.getCalls(fset, f)18	variables := r.getVariables(fset, f)19	r.simplifyProg(functions, calls, variables)20	fmt.Println(r)21}22import (23func main() {24	r := NewRepro()25	fset := token.NewFileSet()26	f, err := parser.ParseFile(fset, "1.go", nil, 0)27	if err != nil {28		log.Fatal(err)29	}30	conf := types.Config{31		Importer: r.importer,32	}33	_, err = conf.Check("main", fset, []*ast.File{f}, nil)34	if err != nil {35		log.Fatal(err)36	}37	functions := r.getFunctions(fset, f)38	calls := r.getCalls(fset, f)39	variables := r.getVariables(fset, f)

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