How to use loadProg method of main Package

Best Syzkaller code snippet using main.loadProg

progs.go

Source:progs.go

1package main2// emtail programs may be updated while emtail is running, and they will be3// reloaded without having to restart the emtail process. Programs can be4// created and deleted as well, and some configuration systems do an atomic5// rename of the program when it is installed, so emtail is also aware of file6// moves.7import (8	"code.google.com/p/go.exp/inotify"9	"expvar"10	"fmt"11	"io/ioutil"12	"log"13	"os"14	"path"15	"path/filepath"16	"sync"17	"text/tabwriter"18)19var (20	prog_ev_count    = expvar.NewInt("prog_events_total")21	prog_loads       = expvar.NewMap("prog_loads_total")22	prog_load_errors = expvar.NewMap("prog_load_errors")23)24func (p *progloader) LoadProgs(program_path string) (*engine, int) {25	p.w.AddWatch(program_path, tProgCreateMask)26	fis, err := ioutil.ReadDir(program_path)27	if err != nil {28		log.Fatalf("Failed to list programs in %q: %s", program_path, err)29	}30	errors := 031	for _, fi := range fis {32		if fi.IsDir() {33			continue34		}35		if filepath.Ext(fi.Name()) != ".em" {36			continue37		}38		errors += p.LoadProg(program_path, fi.Name())39	}40	return &p.e, errors41}42func (p *progloader) LoadProg(program_path string, name string) (errors int) {43	pth := path.Join(program_path, name)44	f, err := os.Open(pth)45	if err != nil {46		log.Printf("Failed to read program %q: %s\n", pth, err)47		errors = 148		prog_load_errors.Add(name, 1)49		return50	}51	defer f.Close()52	v, errs := Compile(name, f)53	if errs != nil {54		errors = 155		for _, e := range errs {56			log.Print(e)57		}58		prog_load_errors.Add(name, 1)59		return60	}61	if *dump_bytecode {62		p.DumpByteCode(name, v)63	}64	p.e.addVm(name, v)65	prog_loads.Add(name, 1)66	return67}68func (p *progloader) DumpByteCode(name string, v *vm) {69	fmt.Printf("Prog %s\n", name)70	fmt.Println("Metrics")71	for i, m := range metrics {72		if m.Program == v.name {73			fmt.Printf(" %8d %s\n", i, m)74		}75	}76	fmt.Println("REs")77	for i, re := range v.re {78		fmt.Printf(" %8d /%s/\n", i, re)79	}80	w := new(tabwriter.Writer)81	w.Init(os.Stdout, 0, 0, 1, ' ', tabwriter.AlignRight)82	fmt.Fprintln(w, "disasm\tl\top\topnd\t")83	for n, i := range v.prog {84		fmt.Fprintf(w, "\t%d\t%s\t%d\t\n", n, opNames[i.op], i.opnd)85	}86	w.Flush()87}88type progloader struct {89	sync.RWMutex90	w         Watcher91	pathnames map[string]struct{}92	e         engine93}94func NewProgLoader(w Watcher) (p *progloader) {95	p = &progloader{w: w,96		e: make(map[string]*vm)}97	p.Lock()98	p.pathnames = make(map[string]struct{})99	p.Unlock()100	go p.start()101	return102}103var (104	tProgCreateMask = inotify.IN_CREATE | inotify.IN_ONLYDIR105	tProgChangeMask = inotify.IN_MODIFY106	tProgDeleteMask = inotify.IN_DELETE107)108func (p *progloader) start() {109	for {110		select {111		case ev := <-p.w.Events():112			prog_ev_count.Add(1)113			switch {114			case ev.Mask&tProgDeleteMask != 0:115				_, f := filepath.Split(ev.Name)116				p.e.removeVm(f)117				p.Lock()118				delete(p.pathnames, f)119				p.Unlock()120				if err := p.w.RemoveWatch(ev.Name); err != nil {121					log.Println("Remove watch failed:", err)122				}123			case ev.Mask&tProgCreateMask|tProgChangeMask != 0:124				if filepath.Ext(ev.Name) != ".em" {125					continue126				}127				d, f := filepath.Split(ev.Name)128				p.Lock()129				if _, ok := p.pathnames[f]; !ok {130					p.pathnames[f] = struct{}{}131					p.w.AddWatch(ev.Name, tProgChangeMask|tProgDeleteMask)132				}133				p.Unlock()134				p.LoadProg(d, f)135			default:136				log.Printf("Unknown event: %q", ev)137			}138		case err := <-p.w.Errors():139			log.Println("watch error: ", err)140		}141	}142}...

program.go

Source:program.go

1package main2import (3	"errors"4	"net"5	"time"6	"github.com/cilium/ebpf/rlimit"7	"github.com/vishvananda/netlink"8)9// attachProgram attaches the given XDP program to the network interface.10func AttachProg(prog_fd int, iface *net.Interface) error {11	if err := DettachProg(iface); err != nil {12		log.Println("error: DettachProg")13		return err14	}15	link, err := netlink.LinkByIndex(iface.Index)16	if err != nil {17		log.Println("error: LinkByIndex")18		return err19	}20	// unix.XDP_FLAGS_UPDATE_IF_NOEXIST,unix.XDP_FLAGS_DRV_MODE, unix.XDP_FLAGS_HW_MODE, unix.XDP_FLAGS_SKB_MODE,21	return netlink.LinkSetXdpFdWithFlags(link, prog_fd, 0) //unix.XDP_FLAGS_UPDATE_IF_NOEXIST)22}23// removeProgram removes an existing XDP program from the given network interface.24func DettachProg(iface *net.Interface) error {25	const tryRepeatCount = 226	for i := 0; i < tryRepeatCount; i++ {27		link, err := netlink.LinkByIndex(iface.Index)28		if err != nil {29			return err30		}31		a := link.Attrs()32		if a == nil || a.Xdp == nil || !a.Xdp.Attached {33			break34		}35		if err = netlink.LinkSetXdpFd(link, -1); err != nil {36			return errors.New("LinkSetXdpFd() failed:" + err.Error())37		}38		time.Sleep(time.Second)39	}40	return nil41}42func GetIface(linkname string) *net.Interface {43	interfaces, err := net.Interfaces()44	if err != nil {45		log.Println("error: failed to fetch the list of network interfaces on the system: ", err.Error())46		return nil47	}48	for _, iface := range interfaces {49		if iface.Name == linkname {50			return &iface51		}52	}53	log.Println("error: couldn't find a suitable network interface to attach to")54	return nil55}56func LoadProg(prog_fd int, linkname string) *net.Interface {57	// Allow the current process to lock memory for eBPF resources.58	err := rlimit.RemoveMemlock()59	if err != nil {60		log.Fatal("rlimit.RemoveMemlock()", err)61		panic("rlimit.RemoveMemlock()")62	}63	iface := GetIface(linkname)64	if iface == nil {65		panic("error: network interface not found")66	}67	err = AttachProg(prog_fd, iface)68	if err != nil {69		log.Fatal("AttachProg() ", err, prog_fd, iface)70		panic("AttachProg() " + err.Error())71	}72	return iface73}...

main.go

Source:main.go

...40	}41	return mp42}43func main() {44	specs, err := loadProg()45	if err != nil {46		log.Fatalf("load prog spec failed: %v", err)47	}48	map3 := LoadMap3FromFile(specs)49	map4 := LoadMap4FromFile(specs)50	fmt.Println(map3, map4)51	rewriteMap := map[string]*ebpf.Map{52		"map_3": map3,53		"map_4": map4,54	}55	fmt.Printf("%v\n", specs)56	if err := specs.RewriteMaps(rewriteMap); err != nil {57		log.Fatalf("rewrite map failed: %v\n", err)58	}...

loadProg

Using AI Code Generation

1import (2func main() {3	if len(os.Args) > 1 {4	} else {5	}6	if err := loadProg(prog); err != nil {7		fmt.Println(err)8		os.Exit(1)9	}10}11import (12func main() {13	if len(os.Args) > 1 {14	} else {15	}16	if err := loadProg(prog); err != nil {17		fmt.Println(err)18		os.Exit(1)19	}20}21import (22func main() {23	if len(os.Args) > 1 {24	} else {25	}26	if err := loadProg(prog); err != nil {27		fmt.Println(err)28		os.Exit(1)29	}30}31import (32func main() {33	if len(os.Args) > 1 {34	} else {35	}36	if err := loadProg(prog); err != nil {37		fmt.Println(err)38		os.Exit(1)39	}40}41import (42func main() {43	if len(os.Args) > 1 {44	} else {45	}46	if err := loadProg(prog); err != nil {47		fmt.Println(err)48		os.Exit(1)49	}50}

loadProg

Using AI Code Generation

1import (2func main() {3	if len(os.Args) < 2 {4		fmt.Println("Usage: 2.go <filename>")5		os.Exit(1)6	}7	fd, err := syscall.Open(filename, syscall.O_RDONLY, 0)8	if err != nil {9		fmt.Println("Error opening file")10		os.Exit(1)11	}12	defer syscall.Close(fd)13	prog := syscall.ProgLoad("raw_tracepoint", "sys_enter", fd)14	if prog == nil {15		fmt.Println("Error loading prog")16		os.Exit(1)17	}18	fmt.Println("Loaded prog id: ", prog.ID)19}

loadProg

Using AI Code Generation

1import (2func main() {3	prog := syscall.BPF_PROG_LOAD{4		Insns:    syscall.RawInstruction{0x18, 0x0, 0x0, 0x0, 0x0, 0x0},5		License:  syscall.StringBytePtr("GPL"),6	}7	progLen := uint32(unsafe.Sizeof(prog))8	_, _, errno := syscall.Syscall(syscall.SYS_BPF,9		uintptr(syscall.BPF_PROG_LOAD),10		uintptr(unsafe.Pointer(&prog)),11		uintptr(unsafe.Sizeof(progLen)))12	if errno != 0 {13		fmt.Printf("Error: %v\n", errno)14	}15}

loadProg

Using AI Code Generation

1public class LoadProg {2 public static void main(String[] args) {3 Main load = new Main();4 load.loadProg();5 }6}

loadProg

Using AI Code Generation

1import (2func main() {3	if len(os.Args) != 2 {4		fmt.Println("Error: Incorrect number of arguments")5		os.Exit(1)6	}7	if !strings.Contains(os.Args[1], ".") {8		fmt.Println("Error: Incorrect format of arguments")9		os.Exit(1)10	}11	fileName := strings.Split(os.Args[1], ".")12	if fileName[1] != "go" {13		fmt.Println("Error: Incorrect file extension")14		os.Exit(1)15	}16	loadProg(fileName[0])17	runProg()18}19import (20func loadProg(fileName string) {21	file, err := os.Open(fileName)22	if err != nil {23		fmt.Println("Error: Error while opening the file")24		os.Exit(1)25	}26	defer file.Close()27	scanner := bufio.NewScanner(file)28	for scanner.Scan() {29		line := strings.Split(scanner.Text(), " ")30		if len(line) != 2 {31			fmt.Println("Error: Incorrect format of line")32			os.Exit(1)33		}34		memoryAddress, err := strconv.Atoi(line[0])35		if err != nil {36			fmt.Println("Error: Incorrect memory address")37			os.Exit(1)38		}39		if memoryAddress < 0 || memoryAddress > 999 {40			fmt.Println("Error: Incorrect memory address")41			os.Exit(1)42		}

loadProg

Using AI Code Generation

1import (2func main() {3 prog := program.NewProgram("test", "test")4 prog.LoadProg()5 fmt.Println(prog)6}

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