How to use Close method of gvisor Package

Best Syzkaller code snippet using gvisor.Close

tun_capture_gvisor.go

Source:tun_capture_gvisor.go

...146- a NIC is created with ID(int32), [name] and 'link endpoint ID' - which is a uint64 in the 'link endpoints'147static table. The LinkEndpoint if has MTU, caps, LinkAddress(MAC), WritePacket and Attach(NetworkDispatcher)148The NetworkDispatcher.DeliverNetworkPacket is also implemented by NIC149*/150func NewTUNFD(fd io.ReadWriteCloser, handler TUNHandler, udpNat UDPHandler) UdpWriter {151	//var err error152	var linkID stack.LinkEndpoint153	//useFD := os.Getenv("CHANNEL_LINK") == ""154	//if f,ok := fd.(*os.File); ok && useFD {155	//	// Bugs - after some time it stops reading.156	//	// Workaround is to use the regular read with a patch.157	//	linkID, err = fdbased.New(&fdbased.Options{158	//		MTU: 1500,159	//		FDs: []int{int(f.Fd()),},160	//		File: f,161	//	})162	//	if err != nil {163	//		log.Println("Link err", err)164	//	}165	//} else {166		log.Println("Using channel based link")167		ep := channel.New(1024, 1500, "")168		linkID = ep169		t := NewGvisorTunCapture(&linkID, handler, udpNat, false)170		go func() {171			m1 := make([]byte, 1600)172			for {173				n, err := fd.Read(m1)174				if err != nil {175					log.Println("NIC read err", err)176					continue177				}178				b := buffer.NewViewFromBytes(m1[0:n])179				//log.Println("RD ", n, err)180				pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{181					Data: b.ToVectorisedView(),182				})183				ep.InjectInbound(ipv4.ProtocolNumber, pkt)184			}185		}()186		go func() {187			m1 := make([]byte, 1600)188			ctx := context.Background()189			for {190				// Read is non-blocking191				pi, err := ep.ReadContext(ctx)192				if !err {193					continue194				}195				if pi.Pkt == nil {196					continue197				}198				//log.Println(pi)199				// TODO: reuse a buffer200				vv := pi.Pkt.Views()201				n := 0202				for _, v := range vv {203					copy(m1[n:], v)204					n += v.Size()205				}206				fd.Write(m1[0:n])207			}208		}()209		//linkID = ep.LinkAddress()210		//stack.FindLinkEndpoint(linkIDID)211		//linkID = NewReaderWriterLink(fd, fd, &Options{MTU: 1600})212//	}213	return t214}215type mymatch struct {216}217func (*mymatch) Name() string {218	return "my"219}220func (*mymatch) 	Match(hook stack.Hook, pkt *stack.PacketBuffer, interfaceName string) (matches bool, hotdrop bool) {221	tcpHeader := header.TCP(pkt.TransportHeader().View())222	if tcpHeader.DestinationPort() == 5201 {223		return true, false224	}225	return false , false226}227// NewTunCapture creates an in-process tcp stack, backed by an tun-like network interface.228// All TCP streams initiated on the tun or localhost will be captured.229func NewGvisorTunCapture(ep *stack.LinkEndpoint, handler TUNHandler, udpNat UDPHandler, snif bool) *GvisorTun {230	t := &GvisorTun{231		Handler: handler,232		UDPHandler: udpNat,233	}234	netProtos := []stack.NetworkProtocolFactory{ipv4.NewProtocol, ipv6.NewProtocol, arp.NewProtocol}235	transProtos := []stack.TransportProtocolFactory{236		tcp.NewProtocol,237		udp.NewProtocol,238		icmp.NewProtocol4,239		icmp.NewProtocol6,240	}241	ipt := netfilter.DefaultLinuxTables()242	//// 3 tables for ip4243	if false {244		natt := ipt.GetTable(stack.NATID, false)245		//// To trigger modified = true246		ipt.ReplaceTable(stack.NATID, natt, false)247		//// Default has 5 rules.248		//// HAck !!!!249		natt.Rules[0].Target = &stack.RedirectTarget{250			Port:            5201,251			NetworkProtocol: ipv4.ProtocolNumber}252		natt.Rules[0].Filter = stack.IPHeaderFilter{253			Protocol:      tcp.ProtocolNumber,254			CheckProtocol: true,255		}256		//// Can only create matcher using unmarshal257		natt.Rules[0].Matchers = []stack.Matcher{258			&mymatch{},259		}260	}261	t.IPStack = stack.New(stack.Options{262		NetworkProtocols:   netProtos,263		TransportProtocols: transProtos,264		//Clock:              clock,265		Stats:              netstack.Metrics,266		HandleLocal:        false, // accept from other nics267		// Enable raw sockets for users with sufficient268		// privileges.269		RawFactory: raw.EndpointFactory{},270		//UniqueID:   uniqueID,271		IPTables:   ipt,272	})273	loopbackLinkID := loopback.New()274	if true || snif {275		loopbackLinkID = sniffer.New(loopbackLinkID)276	}277	t.IPStack.CreateNIC(1, loopbackLinkID)278	addr1 := "\x7f\x00\x00\x01"279	if err := t.IPStack.AddAddress(1, ipv4.ProtocolNumber, tcpip.Address(addr1)); err != nil {280		log.Print("Can't add address", err)281		return t282	}283	if err := t.IPStack.AddAddress(1, ipv6.ProtocolNumber, tcpip.Address(net.IPv6loopback)); err != nil {284		log.Print("Can't add IP6 address", err)285		return t286	}287	ep1 := *ep288	//if snif {289	//	ep1 = sniffer.New(ep1)290	//}291	// NIC 2 - IP4, IP6292	t.IPStack.CreateNIC(2, ep1)293	addr2 := "\x0a\x0c\x00\x01"294	if err := t.IPStack.AddAddress(2, ipv4.ProtocolNumber, tcpip.Address(addr2)); err != nil {295		log.Print("Can't add address", err)296		return t297	}298	addr3, _ := net.ResolveIPAddr("ip", "fd::01")299	if err := t.IPStack.AddAddress(2, ipv6.ProtocolNumber, tcpip.Address(addr3.IP)); err != nil {300		log.Print("Can't add address", err)301		return t302	}303	t.IPStack.SetPromiscuousMode(2, true)304	t.IPStack.SetSpoofing(2, true)305	sn, _ := tcpip.NewSubnet(tcpip.Address("\x00"), tcpip.AddressMask("\x00"))306	//t.IPStack.AddSubnet(2, ipv4.ProtocolNumber, sn)307	t.IPStack.AddRoute(tcpip.Route{NIC: 2, Destination: sn})308	sn, _ = tcpip.NewSubnet(tcpip.Address("\x00"), tcpip.AddressMask("\x00"))309	//t.IPStack.AddSubnet(2, ipv6.ProtocolNumber, sn)310	t.IPStack.AddRoute(tcpip.Route{NIC: 2, Destination: sn})311	gsetRouteTable(t.IPStack, ep != nil)312	//epp := newEpProxy()313	go t.DefTcpServer(handler) //echo)314	go t.DefTcp6Server() //echo)315	go t.defUdpServer()316	t.defUdp6Server()317	// Bound to 10.22.0.5, which is routed to dmesh1318	//addrN := tcpip.FullAddress{2, tcpip.Address(net.IPv4(10, 55, 0, 5).To4()), 5228}319	//c1, err := gonet.NewPacketConn(t.IPStack, addrN, ipv4.ProtocolNumber)320	//if err != nil {321	//	log.Println("XXXXXX ", err)322	//}323	//t.udpPacketConn = c1324	//go t.udpPing(2, t.IPStack)325	return t326}327// Debugging reception - send a packet every 5 seconds to port 1999.328// DST IP is the current eth IP329func (nt *GvisorTun) udpPing(NICID tcpip.NICID, stack *stack.Stack) {330	//addr1 := tcpip.FullAddress{NICID, tcpip.Address(net.IPv4(10, 12, 0, 5).To4()), 5228}331	// Works:332	// Doesn't seem to work333	//addr1 := tcpip.FullAddress{NICID, tcpip.Address(net.IPv4(73, 158, 64, 16).To4()), 5228}334	for {335		time.Sleep(15 * time.Second)336		//c1.WriteTo([]byte("Hi1"), &net.UDPAddr{Port: 1999, IP: net.IPv4(10, 12, 0, 5)})337		//nt.udpPacketConn.WriteTo([]byte("Hi2  1234"), &net.UDPAddr{Port: 1999, IP: net.IPv4(10, 10, 201, 200)})338		ip9 := net.ParseIP("2001:470:1f04:428::9")339		nt.udpPacketConn.WriteTo([]byte("Hi2  1234"), &net.UDPAddr{Port: 1999, IP: ip9})340	}341}342func (nt *GvisorTun) WriteTo(data []byte, dst *net.UDPAddr, src *net.UDPAddr) (int, error) {343	addrb := []byte(dst.IP)344	//srcaddrb := []byte(src.IP.To4())345	// TODO: how about from ?346	// TODO: do we need to make a copy ? netstack passes ownership, we may reuse buffers347	n, _, err := nt.DefUDP.Write(tcpip.SlicePayload(data), tcpip.WriteOptions{348		To: &tcpip.FullAddress{349			Port: uint16(dst.Port),350			Addr: tcpip.Address(addrb),351		},352		// TODO(costin): PATCH353		//From: &tcpip.FullAddress{354		//	Port: uint16(src.Port),355		//	Addr: tcpip.Address(srcaddrb),356		//},357	})358	if err != nil {359		return 0, errors.New(err.String())360	}361	return int(n), nil362}363//type tcpHandler func(wq *waiter.Queue, ep tcpip.Endpoint)364//type UdpLocalReader interface {365//	ReadLocal(addr *tcpip.DoubleAddress) (buffer.View, tcpip.ControlMessages, *tcpip.Error)366//}367func (nt *GvisorTun) defUdpServer() error {368	// Like a socket369	var wq waiter.Queue370	ep, err := nt.IPStack.NewEndpoint(udp.ProtocolNumber, ipv4.ProtocolNumber, &wq)371	if err != nil {372		return errors.New(err.String())373	}374	nt.DefUDP = ep375	// No address - listen on all376	err = ep.Bind(tcpip.FullAddress{377		//Addr: "\x01", - error378		//Addr: "\x00\x00\x00\x00",379		//Port: 2000,380		Port: 0xffff,381		//Port: 15001,382	})383	if err != nil {384		ep.Close()385		return errors.New(err.String())386	}387	ep.SocketOptions().SetReceiveOriginalDstAddress(true)388	we, ch := waiter.NewChannelEntry(nil)389	wq.EventRegister(&we, waiter.EventIn)390	go func() {391		for {392			// Will have the peer address393			add := tcpip.FullAddress{}394			//ep.SetSockOpt()395			// Add is send address. Control should include the dest addr ( for raw )396			v, c, err := ep.Read(&add)397			//v, _, err := ep.(UdpLocalReader).ReadLocal(&add)398			if err == tcpip.ErrWouldBlock {399				select {400				case <-ch:401					continue402				}403			}404			// TODO: add back full address for UDP405			if nt.UDPHandler != nil {406				nt.UDPHandler.HandleUdp(net.IP(c.OriginalDstAddress.Addr),407					c.OriginalDstAddress.Port,408					net.IP(add.Addr), add.Port,409					v)410			}411		}412	}()413	return nil414}415func (nt *GvisorTun) defUdp6Server() error {416	// Like a socket417	//var wq waiter.Queue418	//419	//ep6, err := nt.IPStack.NewEndpoint(udp.ProtocolNumber, ipv6.ProtocolNumber, &wq)420	//if err != nil {421	//	return errors.New(err.String())422	//}423	//err = ep6.Bind(tcpip.FullAddress{424	//	//Addr: "\x01", - error425	//	Addr: tcpip.Address(net.IPv6loopback),426	//	//Port: 2000,427	//	Port: 0xffff,428	//	NIC:  2,429	//}, nil)430	//if err != nil {431	//	ep6.Close()432	//	return errors.New(err.String())433	//}434	//nt.IPStack.Capture(ipv6.ProtocolNumber, udp.ProtocolNumber, ep6.(stack.TransportEndpoint))435	//436	//we, ch := waiter.NewChannelEntry(nil)437	//wq.EventRegister(&we, waiter.EventIn)438	////defer wq.EventUnregister(&we)439	//440	//go func() {441	//	for {442	//		// Will have the peer address443	//		add := tcpip.DoubleAddress{}444	//		//ep.SetSockOpt()445	//		v, _, err := ep6.(UdpLocalReader).ReadLocal(&add)446	//		if err == tcpip.ErrWouldBlock {447	//			select {448	//			case <-ch:449	//				continue450	//			}451	//		}452	//453	//		la := net.IP([]byte(add.LocalAddr))454	//		//if la.To4() == nil {455	//		//	log.Print("IP6 ", la)456	//		//}457	//		if add.LocalAddr[0] == 0xff {458	//			continue459	//		}460	//461	//		if nt.UDPHandler != nil {462	//			nt.UDPHandler.HandleUdp(la, add.LocalPort,463	//				net.IP([]byte(add.FullAddress.Addr)), add.FullAddress.Port,464	//				v)465	//		}466	//467	//	}468	//}()469	return nil470}471//var (472//	Dump = false473//)474func (nt *GvisorTun) DefTcpServer(handler TUNHandler)  {475	var wq waiter.Queue476	// No address - listen on all477	//err = ep.Bind(tcpip.FullAddress{478	//	Port: 0xffff,479	//}, nil) // reserves port480	//if err != nil {481	//	ep.Close()482	//	return nil, wq, errors.New(err.String())483	//}484	// MISSING ACCEPT485	//ep, _ := nt.IPStack.NewRawEndpoint( tcp.ProtocolNumber,ipv4.ProtocolNumber, &wq, false)486	ep, _ := nt.IPStack.NewEndpoint( tcp.ProtocolNumber,ipv4.ProtocolNumber, &wq)487	ep.Bind(tcpip.FullAddress{Port: 0xffff})488	//ep.Bind(tcpip.FullAddress{Port: 5201})489	if err := ep.Listen(100); err != nil { // calls Register490		ep.Close()491		return492	}493	tl := gonet.NewTCPListener(nt.IPStack, &wq, ep)494	tl.ReverseAddr = true495	for {496		c, err := tl.Accept()497		if err != nil {498			log.Println(err)499			continue500		}501		go handler.HandleTUN(c, nil)502	}503	//we, listenCh := waiter.NewChannelEntry(nil)504	//wq.EventRegister(&we, waiter.EventIn)505	//506	//// receive TCP packets on port507	//go func() {508	//	defer wq.EventUnregister(&we)509	//	for {510	//		epin, wqin, err := ep.Accept()511	//		if err != nil {512	//			if err == tcpip.ErrWouldBlock {513	//				<-listenCh514	//				continue515	//			}516	//			log.Println("Unexpected accept error")517	//		}518	//		if Dump {519	//			add, _ := epin.GetRemoteAddress()520	//			ladd, _ := epin.GetLocalAddress()521	//			log.Printf("TUN: Accepted %v %v", ladd, add)522	//		}523	//524	//		conn := gonet.NewConn(wqin, epin)525	//		go func() {526	//			err := handler.HandleTUN(conn)527	//			if err != nil {528	//				return529	//			}530	//		}()531	//532	//	}533	//}()534}535func (nt *GvisorTun) DefTcp6Server()  {536	//var wq waiter.Queue537	//ep, err := nt.IPStack.NewEndpoint(tcp.ProtocolNumber, ipv6.ProtocolNumber, &wq)538	//if err != nil {539	//	return nil, wq, errors.New(err.String())540	//}541	//542	//// No address - listen on all543	//err = ep.Bind(tcpip.FullAddress{544	//	Addr: tcpip.Address(net.IPv6loopback),545	//	Port: 0xffff,546	//	NIC:  2,547	//}, nil) // reserves port548	//if err != nil {549	//	ep.Close()550	//	return nil, wq, errors.New(err.String())551	//}552	//nt.IPStack.Capture(ipv6.ProtocolNumber, tcp.ProtocolNumber, ep.(stack.TransportEndpoint))553	//554	//if err := ep.Listen(10); err != nil { // calls Register555	//	ep.Close()556	//	return nil, wq, errors.New(err.String())557	//}558	//559	//we, listenCh := waiter.NewChannelEntry(nil)560	//wq.EventRegister(&we, waiter.EventIn)561	//562	//// receive TCP packets on port563	//go func() {564	//	defer wq.EventUnregister(&we)565	//	for {566	//		epin, wqin, err := ep.Accept()567	//		if err != nil {568	//			if err == tcpip.ErrWouldBlock {569	//				<-listenCh...

gvisortest.go

Source:gvisortest.go

...90			_, err = sc.Write([]byte(testMsg))91			if err != nil {92				fmt.Printf("write error: %s\n", err)93			}94			err = sc.Close()95			if err != nil {96				fmt.Printf("close error: %s\n", err)97			}98		}()99	}100}101func gonetDialer(netStack *stack.Stack, addr tcpip.Address, port uint16) func() (net.Conn, error) {102	return func() (net.Conn, error) {103		return gonet.DialTCP(104			netStack,105			tcpip.FullAddress{106				NIC:  1,107				Addr: addr,108				Port: port,109			},110			ipv6.ProtocolNumber)111	}112}113func netDialer(addr net.IP, port int) func() (net.Conn, error) {114	return func() (net.Conn, error) {115		return net.DialTCP(116			"tcp6",117			nil,118			&net.TCPAddr{119				IP:   addr,120				Port: port,121			},122		)123	}124}125func runTestConns(dialFunc func() (net.Conn, error), nConns int, wg *sync.WaitGroup) {126	for i := 0; i < nConns; i++ {127		go func() {128			defer wg.Done()129			c, err := dialFunc()130			if err != nil {131				fmt.Printf("dial TCP error: %s\n", err)132				return133			}134			b, err := io.ReadAll(c)135			if err != nil {136				fmt.Printf("read TCP error: %s\n", err)137				return138			}139			err = c.Close()140			if err != nil {141				fmt.Printf("close TCP error: %s\n", err)142				return143			}144			if string(b) != testMsg {145				fmt.Printf("incorrect data received: expected %s but got %s\n", testMsg, b)146				return147			}148		}()149	}150}151func runGonet(nConns int) error {152	fds, err := syscall.Socketpair(syscall.AF_UNIX, syscall.SOCK_SEQPACKET, 0)153	if err != nil {...

comm.go

Source:comm.go

...25	RemoteAddr() net.Addr26}27type CommTCPConn interface {28	CommIPConn29	io.ReadWriteCloser30}31type CommUDPConn interface {32	CommIPConn33	io.ReadWriteCloser34}35type CommEndpoint interface {36	tcpip.Endpoint37}38const (39	tcpCongestionControlAlgorithm = "cubic" // "reno" or "cubic"40)41type ForwarderCall func(conn CommTCPConn) error42type UdpForwarderCall func(conn CommUDPConn, ep CommEndpoint) error43func NewDefaultStack(mtu int, tcpCallback ForwarderCall, udpCallback UdpForwarderCall) (*stack.Stack, *channel.Endpoint, error) {44	_netStack := stack.New(stack.Options{45		NetworkProtocols:   []stack.NetworkProtocolFactory{ipv4.NewProtocol, ipv6.NewProtocol},46		TransportProtocols: []stack.TransportProtocolFactory{tcp.NewProtocol, udp.NewProtocol}})47	//è½¬åå¼å³,å¿é¡»48	//_netStack.SetForwarding(ipv4.ProtocolNumber,true);49	_netStack.SetForwardingDefaultAndAllNICs(ipv4.ProtocolNumber, true)50	_netStack.SetForwardingDefaultAndAllNICs(ipv6.ProtocolNumber, true)51	var nicid tcpip.NICID = 152	macAddr, err := net.ParseMAC("de:ad:be:ee:ee:ef")53	if err != nil {54		fmt.Printf(err.Error())55		return _netStack, nil, err56	}57	opt1 := tcpip.CongestionControlOption(tcpCongestionControlAlgorithm)58	if err := _netStack.SetTransportProtocolOption(tcp.ProtocolNumber, &opt1); err != nil {59		return nil, nil, fmt.Errorf("set TCP congestion control algorithm: %s", err)60	}61	var linkID stack.LinkEndpoint62	var channelLinkID = channel.New(1024, uint32(mtu), tcpip.LinkAddress(macAddr))63	linkID = channelLinkID64	if err := _netStack.CreateNIC(nicid, linkID); err != nil {65		return _netStack, nil, errors.New(err.String())66	}67	_netStack.SetRouteTable([]tcpip.Route{68		// IPv469		{70			Destination: header.IPv4EmptySubnet,71			NIC:         nicid,72		},73	})74	//promiscuous mode å¿é¡»75	_netStack.SetPromiscuousMode(nicid, true)76	_netStack.SetSpoofing(nicid, true)77	tcpForwarder := tcp.NewForwarder(_netStack, 0, 512, func(r *tcp.ForwarderRequest) {78		var wq waiter.Queue79		ep, err := r.CreateEndpoint(&wq)80		if err != nil {81			log.Printf("CreateEndpoint" + err.String() + "\r\n")82			r.Complete(true)83			return84		}85		defer ep.Close()86		r.Complete(false)87		if err := setKeepalive(ep); err != nil {88			log.Printf("setKeepalive" + err.Error() + "\r\n")89		}90		conn := gonet.NewTCPConn(&wq, ep)91		defer conn.Close()92		tcpCallback(conn)93	})94	_netStack.SetTransportProtocolHandler(tcp.ProtocolNumber, tcpForwarder.HandlePacket)95	udpForwarder := udp.NewForwarder(_netStack, func(r *udp.ForwarderRequest) {96		var wq waiter.Queue97		ep, err := r.CreateEndpoint(&wq)98		if err != nil {99			log.Printf("r.CreateEndpoint() = %v", err)100			return101		}102		go udpCallback(gonet.NewUDPConn(_netStack, &wq, ep), ep)103	})104	_netStack.SetTransportProtocolHandler(udp.ProtocolNumber, udpForwarder.HandlePacket)105	return _netStack, channelLinkID, nil...

Using AI Code Generation

1import "fmt"2type gvisor struct {3}4func (g *gvisor) Close() {5    fmt.Println("Closing gvisor")6}7func main() {8    g.Close()9}10import "fmt"11type gvisor struct {12}13func (g *gvisor) Close() {14    fmt.Println("Closing gvisor")15}16func main() {17    g.Close()18}19import "fmt"20type gvisor struct {21}22func (g *gvisor) Close() {23    fmt.Println("Closing gvisor")24}25func main() {26    g.Close()27}28import "fmt"29type gvisor struct {30}31func (g *gvisor) Close() {32    fmt.Println("Closing gvisor")33}34func main() {35    g.Close()36}37import "fmt"38type gvisor struct {39}40func (g *gvisor) Close() {41    fmt.Println("Closing gvisor")42}43func main() {44    g.Close()45}46import "fmt"47type gvisor struct {

Using AI Code Generation

1import (2func main() {3	gvisor := new(Gvisor)4	gvisor.Close()5}6import (7type Gvisor struct {8}9func (gvisor *Gvisor) Close() {10	fmt.Println("Close method of Gvisor is called")

Using AI Code Generation

1func main() {2    gvisor, err := gvisor.New()3    if err != nil {4        log.Fatal(err)5    }6    defer gvisor.Close()7}8func main() {9    gvisor, err := gvisor.New()10    if err != nil {11        log.Fatal(err)12    }13    defer gvisor.Close()14}15func main() {16    gvisor, err := gvisor.New()17    if err != nil {18        log.Fatal(err)19    }20    defer gvisor.Close()21}22func main() {23    gvisor, err := gvisor.New()24    if err != nil {25        log.Fatal(err)26    }27    defer gvisor.Close()28}29func main() {30    gvisor, err := gvisor.New()31    if err != nil {32        log.Fatal(err)33    }34    defer gvisor.Close()35}36func main() {37    gvisor, err := gvisor.New()38    if err != nil {39        log.Fatal(err)40    }41    defer gvisor.Close()42}43func main() {44    gvisor, err := gvisor.New()45    if err != nil {46        log.Fatal(err)47    }48    defer gvisor.Close()49}50func main() {51    gvisor, err := gvisor.New()52    if err != nil {53        log.Fatal(err)54    }55    defer gvisor.Close()56}57func main() {58    gvisor, err := gvisor.New()59    if err != nil {60        log.Fatal(err)61    }62    defer gvisor.Close()63}64func main()

Using AI Code Generation

1import (2func main() {3	g := gvisor.New()4	err := g.Init()5	if err != nil {6		fmt.Printf("gvisor init error: %v", err)7	}8	defer g.Close()9	fmt.Printf("gvisor init success")10}11import (12func main() {13	g := gvisor.New()14	err := g.Init()15	if err != nil {16		fmt.Printf("gvisor init error: %v", err)17	}18	defer g.Close()19	fmt.Printf("gvisor init success")20}21import (22func main() {23	g := gvisor.New()24	err := g.Init()25	if err != nil {26		fmt.Printf("gvisor init error: %v", err)27	}28	defer g.Close()29	fmt.Printf("gvisor init success")30}31import (32func main() {33	g := gvisor.New()34	err := g.Init()35	if err != nil {36		fmt.Printf("gvisor init error: %v", err)37	}38	defer g.Close()39	fmt.Printf("gvisor init success")40}41import (42func main() {43	g := gvisor.New()44	err := g.Init()45	if err != nil {46		fmt.Printf("gvisor init error: %v", err)47	}48	defer g.Close()49	fmt.Printf("gvisor init success")50}51import (52func main() {53	g := gvisor.New()54	err := g.Init()55	if err != nil {56		fmt.Printf("gvisor init error: %v", err)57	}58	defer g.Close()59	fmt.Printf("gvisor init success")60}61import (62func main() {

Using AI Code Generation

1import "fmt"2type gvisor struct {3}4func (g gvisor) Close() {5    fmt.Println("Close method of gvisor class")6}7func main() {8    var i interface{}9    i = gvisor{"gvisor"}10    i.(gvisor).Close()11}12i.(T)13import "fmt"14type gvisor struct {15}16func (g gvisor) Close() {17    fmt.Println("Close method of gvisor class")18}19func main() {20    var i interface{}21    i = gvisor{"gvisor"}22    i.(gvisor).Close()23}24switch i.(type) {25}26import "fmt"27type gvisor struct {28}29func (g gvisor) Close() {30    fmt.Println("Close method of gvisor class")31}32func main() {33    var i interface{}34    i = gvisor{"gvisor"}35    switch i.(type) {36        i.(gvisor).Close()37        fmt.Println("No type")38    }39}

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello, playground")4	g := new(gvisor)5	g.Close()6}7import (8func main() {9	fmt.Println("Hello, playground")10	g := new(gvisor)11	g.Close()12}13import (14func main() {15	fmt.Println("Hello, playground")16	g := new(gvisor)17	g.Close()18}19import (20func main() {21	fmt.Println("Hello, playground")22	g := new(gvisor)23	g.Close()24}25import (26func main() {27	fmt.Println("Hello, playground")28	g := new(gvisor)29	g.Close()30}31import (32func main() {33	fmt.Println("Hello, playground")34	g := new(gvisor)35	g.Close()36}37import (38func main() {39	fmt.Println("Hello, playground")40	g := new(gvisor)41	g.Close()42}43import (44func main() {45	fmt.Println("Hello, playground")46	g := new(gvisor)47	g.Close()48}49import (50func main() {51	fmt.Println("Hello, playground")52	g := new(gvisor)53	g.Close()54}55import (56func main() {57	fmt.Println("Hello, playground")58	g := new(gvisor)59	g.Close()60}

Using AI Code Generation

1import (2func main() {3	gv := gvisor.Gvisor{}4	gv.Close()5	fmt.Println("Done")6}7import (8func main() {9	gv := gvisor.Gvisor{}10	gv.Close()11	fmt.Println("Done")12}13import (14func main() {15	gv := gvisor.Gvisor{}16	gv.Close()17	fmt.Println("Done")18}19import (20func main() {21	gv := gvisor.Gvisor{}22	gv.Close()23	fmt.Println("Done")24}25import (26func main() {27	gv := gvisor.Gvisor{}28	gv.Close()29	fmt.Println("Done")30}31import (32func main() {33	gv := gvisor.Gvisor{}34	gv.Close()35	fmt.Println("Done")36}37import (38func main() {

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.