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 (

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