func (mgr *Manager) saveRepro(crash *Crash, res *repro.Result) { sig := hash.Hash([]byte(crash.desc)) dir := filepath.Join(mgr.crashdir, sig.String()) if res == nil { for i := 0; i < maxReproAttempts; i++ { name := filepath.Join(dir, fmt.Sprintf("repro%v", i)) if _, err := os.Stat(name); err != nil { ioutil.WriteFile(name, nil, 0660) break } } return } opts := fmt.Sprintf("# %+v\n", res.Opts) prog := res.Prog.Serialize() ioutil.WriteFile(filepath.Join(dir, "repro.prog"), append([]byte(opts), prog...), 0660) if len(mgr.cfg.Tag) > 0 { ioutil.WriteFile(filepath.Join(dir, "repro.tag"), []byte(mgr.cfg.Tag), 0660) } if len(crash.text) > 0 { ioutil.WriteFile(filepath.Join(dir, "repro.report"), []byte(crash.text), 0660) } if res.CRepro { cprog, err := csource.Write(res.Prog, res.Opts) if err == nil { formatted, err := csource.Format(cprog) if err == nil { cprog = formatted } ioutil.WriteFile(filepath.Join(dir, "repro.cprog"), cprog, 0660) } else { Logf(0, "failed to write C source: %v", err) } } }
func main() { flag.Parse() if len(flag.Args()) != 1 { fmt.Fprintf(os.Stderr, "usage: prog2c [-threaded [-collide]] prog_file\n") os.Exit(1) } data, err := ioutil.ReadFile(flag.Args()[0]) if err != nil { fmt.Fprintf(os.Stderr, "failed to read prog file: %v\n", err) os.Exit(1) } p, err := prog.Deserialize(data) if err != nil { fmt.Fprintf(os.Stderr, "failed to deserialize the program: %v\n", err) os.Exit(1) } opts := csource.Options{ Threaded: *flagThreaded, Collide: *flagCollide, } src := csource.Write(p, opts) if formatted, err := csource.Format(src); err != nil { fmt.Fprintf(os.Stderr, "%v\n", err) } else { src = formatted } os.Stdout.Write(src) }
func main() { os.Args = append(append([]string{}, os.Args[0], "-v=10"), os.Args[1:]...) flag.Parse() cfg, _, err := config.Parse(*flagConfig) if err != nil { Fatalf("%v", err) } if *flagCount > 0 { cfg.Count = *flagCount } if cfg.Count > 4 { cfg.Count = 4 } if len(flag.Args()) != 1 { Fatalf("usage: syz-repro -config=config.file execution.log") } data, err := ioutil.ReadFile(flag.Args()[0]) if err != nil { Fatalf("failed to open log file: %v", err) } vmIndexes := make([]int, cfg.Count) for i := range vmIndexes { vmIndexes[i] = i } go func() { c := make(chan os.Signal, 2) signal.Notify(c, syscall.SIGINT) <-c close(vm.Shutdown) Logf(-1, "shutting down...") <-c Fatalf("terminating") }() res, err := repro.Run(data, cfg, vmIndexes) if err != nil { Logf(0, "reproduction failed: %v", err) } if res == nil { return } fmt.Printf("opts: %+v crepro: %v\n\n", res.Opts, res.CRepro) fmt.Printf("%s\n", res.Prog.Serialize()) if res.CRepro { src, err := csource.Write(res.Prog, res.Opts) if err != nil { Fatalf("failed to generate C repro: %v", err) } if formatted, err := csource.Format(src); err == nil { src = formatted } fmt.Printf("%s\n", src) } }
func main() { flag.Parse() if *flagProg == "" { flag.PrintDefaults() os.Exit(1) } data, err := ioutil.ReadFile(*flagProg) if err != nil { fmt.Fprintf(os.Stderr, "failed to read prog file: %v\n", err) os.Exit(1) } p, err := prog.Deserialize(data) if err != nil { fmt.Fprintf(os.Stderr, "failed to deserialize the program: %v\n", err) os.Exit(1) } opts := csource.Options{ Threaded: *flagThreaded, Collide: *flagCollide, Repeat: *flagRepeat, Procs: *flagProcs, Sandbox: *flagSandbox, Repro: false, } src, err := csource.Write(p, opts) if err != nil { fmt.Fprintf(os.Stderr, "failed to generate C spurce: %v\n", err) os.Exit(1) } if formatted, err := csource.Format(src); err != nil { fmt.Fprintf(os.Stderr, "%v\n", err) } else { src = formatted } os.Stdout.Write(src) }
func repro(cfg *config.Config, entries []*prog.LogEntry, crashStart int) { // Cut programs that were executed after crash. for i, ent := range entries { if ent.Start > crashStart { entries = entries[:i] break } } // Extract last program on every proc. procs := make(map[int]int) for i, ent := range entries { procs[ent.Proc] = i } var indices []int for _, idx := range procs { indices = append(indices, idx) } sort.Ints(indices) var suspected []*prog.LogEntry for i := len(indices) - 1; i >= 0; i-- { suspected = append(suspected, entries[indices[i]]) } // Execute the suspected programs. Logf(0, "the suspected programs are:") for _, ent := range suspected { Logf(0, "on proc %v:\n%s\n", ent.Proc, ent.P.Serialize()) } var p *prog.Prog multiplier := 1 for ; p == nil && multiplier <= 100; multiplier *= 10 { for _, ent := range suspected { if testProg(cfg, ent.P, multiplier, true, true) { p = ent.P break } } } if p == nil { Logf(0, "no program crashed") return } Logf(0, "minimizing program") p, _ = prog.Minimize(p, -1, func(p1 *prog.Prog, callIndex int) bool { return testProg(cfg, p1, multiplier, true, true) }) opts := csource.Options{ Threaded: true, Collide: true, } if testProg(cfg, p, multiplier, true, false) { opts.Collide = false if testProg(cfg, p, multiplier, false, false) { opts.Threaded = false } } src := csource.Write(p, opts) src, _ = csource.Format(src) Logf(0, "C source:\n%s\n", src) srcf, err := fileutil.WriteTempFile(src) if err != nil { Fatalf("%v", err) } bin, err := csource.Build(srcf) if err != nil { Fatalf("%v", err) } defer os.Remove(bin) testBin(cfg, bin) }