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How to use extractError method of vm Package

Best Syzkaller code snippet using vm.extractError

vm.go

Source:vm.go

...163				crash := ""164				if mon.exit&ExitNormal == 0 {165					crash = lostConnectionCrash166				}167				return mon.extractError(crash)168			case ErrTimeout:169				if mon.exit&ExitTimeout == 0 {170					return mon.extractError(timeoutCrash)171				}172				return nil173			default:174				// Note: connection lost can race with a kernel oops message.175				// In such case we want to return the kernel oops.176				crash := ""177				if mon.exit&ExitError == 0 {178					crash = lostConnectionCrash179				}180				return mon.extractError(crash)181			}182		case out, ok := <-outc:183			if !ok {184				outc = nil185				continue186			}187			lastPos := len(mon.output)188			mon.output = append(mon.output, out...)189			if bytes.Contains(mon.output[lastPos:], executingProgram1) ||190				bytes.Contains(mon.output[lastPos:], executingProgram2) {191				lastExecuteTime = time.Now()192			}193			if reporter.ContainsCrash(mon.output[mon.matchPos:]) {194				return mon.extractError("unknown error")195			}196			if len(mon.output) > 2*beforeContext {197				copy(mon.output, mon.output[len(mon.output)-beforeContext:])198				mon.output = mon.output[:beforeContext]199			}200			// Find the starting position for crash matching on the next iteration.201			// We step back from the end of output by maxErrorLength to handle the case202			// when a crash line is currently split/incomplete. And then we try to find203			// the preceding '\n' to have a full line. This is required to handle204			// the case when a particular pattern is ignored as crash, but a suffix205			// of the pattern is detected as crash (e.g. "ODEBUG:" is trimmed to "BUG:").206			mon.matchPos = len(mon.output) - maxErrorLength207			for i := 0; i < maxErrorLength; i++ {208				if mon.matchPos <= 0 || mon.output[mon.matchPos-1] == '\n' {209					break210				}211				mon.matchPos--212			}213			if mon.matchPos < 0 {214				mon.matchPos = 0215			}216		case <-ticker.C:217			// Detect both "not output whatsoever" and "kernel episodically prints218			// something to console, but fuzzer is not actually executing programs".219			// The timeout used to be 3 mins for a long time.220			// But (1) we were seeing flakes on linux where net namespace221			// destruction can be really slow, and (2) gVisor watchdog timeout222			// is 3 mins + 1/4 of that for checking period = 3m45s.223			// Current linux max timeout is CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=140224			// and workqueue.watchdog_thresh=140 which both actually result225			// in 140-280s detection delay.226			// So the current timeout is 5 mins (300s).227			// We don't want it to be too long too because it will waste time on real hangs.228			if time.Since(lastExecuteTime) < NoOutputTimeout {229				break230			}231			diag, wait := inst.Diagnose()232			if len(diag) > 0 {233				mon.output = append(mon.output, "DIAGNOSIS:\n"...)234				mon.output = append(mon.output, diag...)235			}236			if wait {237				mon.waitForOutput()238			}239			rep := &report.Report{240				Title:      noOutputCrash,241				Output:     mon.output,242				Suppressed: report.IsSuppressed(mon.reporter, mon.output),243			}244			return rep245		case <-Shutdown:246			return nil247		}248	}249}250type monitor struct {251	inst     *Instance252	outc     <-chan []byte253	errc     <-chan error254	reporter report.Reporter255	exit     ExitCondition256	output   []byte257	matchPos int258}259func (mon *monitor) extractError(defaultError string) *report.Report {260	var diagOutput []byte261	appendDiagOutput := func() {262		if len(diagOutput) > 0 {263			mon.output = append(mon.output, report.VMDiagnosisStart...)264			mon.output = append(mon.output, diagOutput...)265		}266	}267	if defaultError != "" {268		// N.B. we always wait below for other errors.269		diagOutput, _ = mon.inst.Diagnose()270	}271	// Give it some time to finish writing the error message.272	mon.waitForOutput()273	if bytes.Contains(mon.output, []byte(fuzzerPreemptedStr)) {...

extractError

Using AI Code Generation

1import (2func main() {3 vm := vm.NewVM()4 err := vm.Run("2.vm")5 if err != nil {6 fmt.Println(err)7 }8}

extractError

Using AI Code Generation

1import (2func main() {3	vm := otto.New()4	_, err := vm.Run(`5		var error = new Error("This is an error");6		throw error;7	if err != nil {8		extractedError := extractError(err)9		fmt.Println(extractedError)10	}11}12func extractError(err error) string {13	vm := otto.New()14	vm.Set("err", err.Error())15	result, _ := vm.Run(`16		var error = JSON.parse(err);17		error.message;18	if result.IsString() {19		return result.String()20	}21}

extractError

Using AI Code Generation

1import (2func main() {3	vm := otto.New()4	vm.Run(`5		var a = 2;6		var b = 3;7		var c = a + b;8		if(c > 4) {9			throw new Error('c is greater than 4');10		}11	err := vm.ExportTo(vm.Get("error"), nil)12	fmt.Println(err)13}14panic(0x4b2e00, 0xc42000a0f0)15github.com/robertkrimen/otto.(*vm).extractError(0xc42007e000, 0x4, 0xc42007e000)16github.com/robertkrimen/otto.(*vm).run(0xc42007e000, 0xc42007e000, 0x0, 0x0, 0x0, 0x0)17github.com/robertkrimen/otto.(*vm).Run(0xc42007e000, 0xc42000a0c0, 0x2b, 0x0, 0x0, 0x0)18github.com/robertkrimen/otto.(*Otto).Run(0xc42000a0a0, 0xc42000a0c0, 0x2b, 0x0, 0x0, 0x0)19main.main()

extractError

Using AI Code Generation

1import (2func main() {3	trace.Start(os.Stderr)4	defer trace.Stop()5	runtime.GOMAXPROCS(1)6	go func() {7	}()8	time.Sleep(3 * time.Second)9}10import (11func main() {12	trace.Start(os.Stderr)13	defer trace.Stop()14	runtime.GOMAXPROCS(1)15	go func() {16		time.Sleep(3 * time.Second)17		panic("oops")18	}()19	time.Sleep(3 * time.Second)20}21import (22func main() {23	trace.Start(os.Stderr)24	defer trace.Stop()25	runtime.GOMAXPROCS(1)26	go func() {27		time.Sleep(3 * time.Second)28		panic("oops")29	}()30	time.Sleep(3 * time.Second)31	panic("oops")32}33import (34func main() {35	trace.Start(os.Stderr)36	defer trace.Stop()37	runtime.GOMAXPROCS(1)38	go func() {39		time.Sleep(3 * time.Second)40		panic("oops")41	}()42	time.Sleep(3 * time.Second)43	panic("oops")44}45import (46func main() {47	trace.Start(os.Stderr)48	defer trace.Stop()49	runtime.GOMAXPROCS(1)50	go func() {

extractError

Using AI Code Generation

1import (2type VM struct {3}4func (vm *VM) ExtractError() error {5	return fmt.Errorf("error")6}7func main() {8	vm := VM{9		Memory: []byte{1, 2, 3},10	}11	err := vm.ExtractError()12	fmt.Println(err)13}

extractError

Using AI Code Generation

1import (2func main() {3	fmt.Println("main started")4	go func() {5		defer func() {6			if r := recover(); r != nil {7				fmt.Println("recoverd from ", r)8			}9		}()10		fmt.Println("goroutine started")11		func() {12			defer func() {13				if r := recover(); r != nil {14					fmt.Println("recoverd from ", r)15				}16			}()17			fmt.Println("sub goroutine started")18			fmt.Println("sub goroutine ended")19		}()20		fmt.Println("goroutine ended")21	}()22	time.Sleep(time.Second * 1)23	fmt.Println("main ended")24}25import (26func main() {27	fmt.Println("main started")28	go func() {29		defer func() {30			if r := recover(); r != nil {31				fmt.Println("recoverd from ", r)32			}33		}()34		fmt.Println("goroutine started")35		func() {36			defer func() {37				if r := recover(); r != nil {38					fmt.Println("recoverd from ", r)39				}40			}()41			fmt.Println("sub goroutine started")42			fmt.Println("sub goroutine ended")43		}()44		fmt.Println("goroutine ended")45	}()46	time.Sleep(time.Second * 1)47	fmt.Println("main ended")48}49import (50func main() {51	fmt.Println("main started")52	go func() {53		defer func() {54			if r := recover(); r != nil {55				fmt.Println("recoverd from ", r)56			}57		}()58		fmt.Println("goroutine started")59		func() {60			defer func() {61				if r := recover(); r != nil {62					fmt.Println("recoverd from ", r)63				}64			}()65			fmt.Println("sub goroutine started")

extractError

Using AI Code Generation

1import (2func main() {3	if len(os.Args) != 3 {4		fmt.Println("Usage: go run 2.go <vm-name> <datastore-name>")5	}6	client, err := vm.NewClient(7		os.Getenv("VMWARE_HOST"),8		os.Getenv("VMWARE_USERNAME"),9		os.Getenv("VMWARE_PASSWORD"),10	if err != nil {11		log.Fatal(err)12	}13	vms, err := client.FindVM(vmName)14	if err != nil {15		log.Fatal(err)16	}17	if len(vms) == 0 {18		log.Fatalf("VM %s not found", vmName)19	}20	err = client.MoveVM(vm, dsName)21	if err != nil {22		log.Fatal(err)23	}24}

extractError

Using AI Code Generation

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

extractError

Using AI Code Generation

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

extractError

Using AI Code Generation

1import (2func main() {3 vmObj := vm.New()4 err := fmt.Errorf("error message")5 vmObj.ExtractError(err)6}

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