Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

How to use AllowsOvercommit method of vm Package

Best Syzkaller code snippet using vm.AllowsOvercommit

vmimpl.go

Source:vmimpl.go

1// Copyright 2017 syzkaller project authors. All rights reserved.2// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.3// Package vmimpl provides an abstract test machine (VM, physical machine, etc)4// interface for the rest of the system. For convenience test machines are subsequently5// collectively called VMs.6// The package also provides various utility functions for VM implementations.7package vmimpl8import (9	"errors"10	"fmt"11	"io"12	"math/rand"13	"net"14	"os/exec"15	"time"16	"github.com/google/syzkaller/pkg/log"17	"github.com/google/syzkaller/pkg/osutil"18)19// Pool represents a set of test machines (VMs, physical devices, etc) of particular type.20type Pool interface {21	// Count returns total number of VMs in the pool.22	Count() int23	// Create creates and boots a new VM instance.24	Create(workdir string, index int) (Instance, error)25}26// Instance represents a single VM.27type Instance interface {28	// Copy copies a hostSrc file into VM and returns file name in VM.29	Copy(hostSrc string) (string, error)30	// Forward sets up forwarding from within VM to the given tcp31	// port on the host and returns the address to use in VM.32	Forward(port int) (string, error)33	// Run runs cmd inside of the VM (think of ssh cmd).34	// outc receives combined cmd and kernel console output.35	// errc receives either command Wait return error or vmimpl.ErrTimeout.36	// Command is terminated after timeout. Send on the stop chan can be used to terminate it earlier.37	Run(timeout time.Duration, stop <-chan bool, command string) (outc <-chan []byte, errc <-chan error, err error)38	// Diagnose retrieves additional debugging info from the VM (e.g. by39	// sending some sys-rq's or SIGABORT'ing a Go program).40	//41	// Optionally returns (some or all) of the info directly. If wait ==42	// true, the caller must wait for the VM to output info directly to its43	// log.44	Diagnose() (diagnosis []byte, wait bool)45	// Close stops and destroys the VM.46	Close()47}48// Env contains global constant parameters for a pool of VMs.49type Env struct {50	// Unique name51	// Can be used for VM name collision resolution if several pools share global name space.52	Name    string53	OS      string // target OS54	Arch    string // target arch55	Workdir string56	Image   string57	SSHKey  string58	SSHUser string59	Debug   bool60	Config  []byte // json-serialized VM-type-specific config61}62// BootError is returned by Pool.Create when VM does not boot.63type BootError struct {64	Title  string65	Output []byte66}67func MakeBootError(err error, output []byte) error {68	switch err1 := err.(type) {69	case *osutil.VerboseError:70		return BootError{err1.Title, append(err1.Output, output...)}71	default:72		return BootError{err.Error(), output}73	}74}75func (err BootError) Error() string {76	return fmt.Sprintf("%v\n%s", err.Title, err.Output)77}78func (err BootError) BootError() (string, []byte) {79	return err.Title, err.Output80}81// Register registers a new VM type within the package.82func Register(typ string, ctor ctorFunc, allowsOvercommit bool) {83	Types[typ] = Type{84		Ctor:       ctor,85		Overcommit: allowsOvercommit,86	}87}88type Type struct {89	Ctor       ctorFunc90	Overcommit bool91}92type ctorFunc func(env *Env) (Pool, error)93var (94	// Close to interrupt all pending operations in all VMs.95	Shutdown   = make(chan struct{})96	ErrTimeout = errors.New("timeout")97	Types = make(map[string]Type)98)99func Multiplex(cmd *exec.Cmd, merger *OutputMerger, console io.Closer, timeout time.Duration,100	stop, closed <-chan bool, debug bool) (<-chan []byte, <-chan error, error) {101	errc := make(chan error, 1)102	signal := func(err error) {103		select {104		case errc <- err:105		default:106		}107	}108	go func() {109		select {110		case <-time.After(timeout):111			signal(ErrTimeout)112		case <-stop:113			signal(ErrTimeout)114		case <-closed:115			if debug {116				log.Logf(0, "instance closed")117			}118			signal(fmt.Errorf("instance closed"))119		case err := <-merger.Err:120			cmd.Process.Kill()121			console.Close()122			merger.Wait()123			if cmdErr := cmd.Wait(); cmdErr == nil {124				// If the command exited successfully, we got EOF error from merger.125				// But in this case no error has happened and the EOF is expected.126				err = nil127			}128			signal(err)129			return130		}131		cmd.Process.Kill()132		console.Close()133		merger.Wait()134		cmd.Wait()135	}()136	return merger.Output, errc, nil137}138func RandomPort() int {139	return rand.Intn(64<<10-1<<10) + 1<<10140}141func UnusedTCPPort() int {142	for {143		port := RandomPort()144		ln, err := net.Listen("tcp", fmt.Sprintf("localhost:%v", port))145		if err == nil {146			ln.Close()147			return port148		}149	}150}...

AllowsOvercommit

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	if err != nil {5		log.Fatal(err)6	}7	c, err := govmomi.NewClient(ctx, u, true)8	if err != nil {9		log.Fatal(err)10	}11	f := find.NewFinder(c.Client, true)12	dc, err := f.DefaultDatacenter(ctx)13	if err != nil {14		log.Fatal(err)15	}16	f.SetDatacenter(dc)17	f := find.NewFinder(c.Client, true)18	dc, err := f.DefaultDatacenter(ctx)19	if err != nil {20		log.Fatal(err)21	}22	f.SetDatacenter(dc)23	vms, err := f.VirtualMachineList(ctx, "*")24	if err != nil {25		log.Fatal(err)26	}27	m := view.NewManager(c.Client)28	v, err := m.CreateContainerView(ctx, dc.Reference(), []string{"VirtualMachine"}, true)29	if err != nil {30		log.Fatal(err)31	}32	defer v.Destroy(ctx)33	err = v.Retrieve(ctx, []string{"VirtualMachine"}, []string{"summary"}, &vms)34	if err != nil {35		log.Fatal(err)36	}37	for _, vm := range vms {38		fmt.Println(vm.Summary.Config.Name)39	}40	m := view.NewManager(c.Client)41	v, err := m.CreateContainerView(ctx, dc.Reference(), []string{"VirtualMachine"}, true)42	if err != nil {43		log.Fatal(err)44	}45	defer v.Destroy(ctx)

AllowsOvercommit

Using AI Code Generation

1import (2func main() {3    ctx := context.Background()4    simulator.Run(func(ctx context.Context, c *vim25.Client) error {5        f := find.NewFinder(c, true)6        vm, err := f.VirtualMachine(ctx, "DC0_H0_VM0")7        if err != nil {8        }9        err = vm.Properties(ctx, vm.Reference(), []string{"summary", "config"}, &mvm)10        if err != nil {11        }12        err = host.Properties(ctx, host.Reference(), []string{"summary", "config"}, &mhost)13        if err != nil {14        }

AllowsOvercommit

Using AI Code Generation

1import (2func main() {3	if len(os.Args) != 4 {4		fmt.Println("Usage: go run 2.go <vc ip> <vc username> <vc password>")5		os.Exit(1)6	}7	ctx, cancel := context.WithCancel(context.Background())8	defer cancel()9	if err != nil {10		log.Fatal(err)11	}12	u.User = url.UserPassword(vcUsername, vcPassword)13	c, err := govmomi.NewClient(ctx, u, true)14	if err != nil {15		log.Fatal(err)16	}17	m := view.NewManager(c.Client)18	v, err := m.CreateContainerView(ctx, c.ServiceContent.RootFolder, []string{"VirtualMachine"}, true)19	if err != nil {20		log.Fatal(err)21	}22	defer v.Destroy(ctx)23	err = v.Retrieve(ctx, []string{"VirtualMachine"}, []string{"summary", "config"}, &vms)24	if err != nil {25		log.Fatal(err)26	}27	for _, vm := range vms {28		fmt.Printf("%s: %s\n", vm.Summary.Config.Name, vm.Summary.Config.GuestFullName)29		fmt.Println("Allows overcommit:", vm.Config.OvercommitSpec.AllowsOvercommit)30	}31	err = v.RetrieveOne(ctx, []string{"VirtualMachine"}, []string{"config"}, &vm)32	if err != nil {33		log.Fatal(err)34	}35	spec := types.VirtualMachineConfigSpec{

AllowsOvercommit

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	if err != nil {5		fmt.Println(err)6	}7	f := find.NewFinder(c.Client, true)8	dc, err := f.DefaultDatacenter(ctx)9	if err != nil {10		fmt.Println(err)11	}12	f.SetDatacenter(dc)13	vm, err := f.VirtualMachine(ctx, "vm-name")14	if err != nil {15		fmt.Println(err)16	}17	rp, err := vm.ResourcePool(ctx)18	if err != nil {19		fmt.Println(err)20	}21	rpConfig, err := rp.ResourceConfig(ctx)22	if err != nil {23		fmt.Println(err)24	}25	_, err = rp.UpdateConfig(ctx, rpConfig)26	if err != nil {27		fmt.Println(err)28	}29	rpConfig, err = rp.ResourceConfig(ctx)30	if err != nil {31		fmt.Println(err)32	}33	fmt.Println(rpMemory.OvercommitAllowed)34}

AllowsOvercommit

Using AI Code Generation

1import (2func main() {3	ctx, cancel := context.WithCancel(context.Background())4	defer cancel()5	vimURL.User = url.UserPassword("username", "password")6	vimClient, err := govmomi.NewClient(ctx, vimURL, true)7	if err != nil {8		fmt.Println("Error in creating the client")9	}10	finder := find.NewFinder(vimClient.Client, true)11	vm, err := finder.VirtualMachine(ctx, "vm1")12	if err != nil {13		fmt.Println("Error in finding the vm")14	}15	err = vm.Properties(ctx, vm.Reference(), []string{"summary", "config", "datastore"}, &mvm)16	if err != nil {17		fmt.Println("Error in getting the properties of the vm")18	}19	err = mvm.Datastore[0].Properties(ctx, mvm.Datastore[0].Reference(), []string{"summary"}, &ds)20	if err != nil {21		fmt.Println("Error in getting the properties of the datastore")22	}23	if ds.Summary.Type == "VMFS" {24		if mvm.Config.OvercommitAllowed == nil {25			fmt.Println("OvercommitAllowed is nil")26		} else {27			fmt.Println("OvercommitAllowed is not nil")28		}29	}30}31import (

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.