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How to use Type method of prog Package

Best Syzkaller code snippet using prog.Type

prog.go

Source:prog.go

...16	"errors"17	"unsafe"18	"golang.org/x/sys/unix"19)20// ProgType is the type of an eBPF program.21type ProgType uint3222// Valid eBPF program types.23const (24	ProgTypeUnspec ProgType = iota25	ProgTypeSocketFilter26	ProgTypeKProbe27	ProgTypeSchedCLS28	ProgTypeSchedACT29	ProgTypeTracepoint30	ProgTypeXDP31	ProgTypePerfEvent32	ProgTypeCGroupSKB33	ProgTypeCGroupSock34	ProgTypeLWTIn35	ProgTypeLWTOut36	ProgTypeLWTXMit37	ProgTypeSockOps38	ProgTypeSKSKB39	ProgTypeCGroupDevice40	ProgTypeSKMsg41	ProgTypeRawTracepoint42	ProgTypeCGroupSockAddr43	ProgTypeLWTSeg6Local44	ProgTypeLIRCMode245	ProgTypeSKReusePort46)47// AttachType describes the attach type of an eBPF program.48type AttachType uint3249// Valid program attach types.50const (51	AttachTypeCGroupInetIngress AttachType = iota52	AttachTypeCGroupInetEgress53	AttachTypeCGroupInetSockCreate54	AttachTypeCGroupSockOps55	AttachTypeSKSKBStreamParser56	AttachTypeSKSKBStreamVerdict57	AttachTypeCGroupDevice58	AttachTypeSKMsgVerdict59	AttachTypeCGroupInet4Bind60	AttachTypeCGroupInet6Bind61	AttachTypeCGroupInet4Connect62	AttachTypeCGroupInet6Connect63	AttachTypeCGroupInet4PostBind64	AttachTypeCGroupInet6PostBind65	AttachTypeCGroupUDP4SendMsg66	AttachTypeCGroupUDP6SendMsg67	AttachTypeLIRCMode268)69// Prog configures an eBPF program.70type Prog struct {71	Type               ProgType72	License            string73	KernelVersion      uint3274	StrictAlignment    bool75	ObjectName         string76	IfIndex            uint3277	ExpectedAttachType AttachType78	pfd *progFD79}80// defaultLogBufSize is the log buffer size used by the Linux tools.81// See tools/lib/bpf.h in the Linux kernel source tree. We use it as-is.82// Perhaps it will be configurable one day.83//84// TODO(acln): configurable?85const defaultLogBufSize = 256 * 102486// BPF_PROG_LOAD flags.87const loadStrictAlignment = 1 << 088// CGroupAttachFlag is a flag for an AttachCGroup operation.89type CGroupAttachFlag uint3290// cgroup attach flags.91const (92	// CGroupAttachAllowNone allows no further bpf programs in the target93	// cgroup sub-tree.94	CGroupAttachAllowNone CGroupAttachFlag = 095	// CGroupAttachAllowOverride arranges for the program in this cgroup96	// to yield to programs installed by sub-cgroups.97	CGroupAttachAllowOverride CGroupAttachFlag = 1 << 098	// CGroupAttachAllowMulti arranges for the program in this cgroup99	// to run in addition to programs installed by sub-cgroups.100	CGroupAttachAllowMulti CGroupAttachFlag = 1 << 1101)102// Load attaches the specified InstructionStream to the Prog103// and loads the program into the kernel.104//105// If the specified InstructionStream uses symbols, all symbols must106// be resolved before calling Load.107//108// If loading the program produces output from the eBPF kernel verifier,109// the output is returned in the log string.110func (p *Prog) Load(s *InstructionStream) (log string, err error) {111	if s.empty() {112		return "", errors.New("ebpf: empty instruction stream")113	}114	if s.hasUnresolvedSymbols() {115		return "", errors.New("ebpf: unresolved symbols in instruction stream")116	}117	insns := s.instructions()118	logbuf := make([]byte, defaultLogBufSize)119	attr := progLoadAttr{120		Type:               p.Type,121		InstructionCount:   uint32(len(insns)),122		Instructions:       iptr(insns),123		License:            bptr(nullTerminatedString(p.License)),124		LogLevel:           1,125		LogBufSize:         uint32(len(logbuf)),126		LogBuf:             bptr(logbuf),127		KernelVersion:      p.KernelVersion,128		Name:               newObjectName(p.ObjectName),129		IfIndex:            p.IfIndex,130		ExpectedAttachType: p.ExpectedAttachType,131	}132	if p.StrictAlignment {133		attr.Flags = loadStrictAlignment134	}135	pfd := new(progFD)136	err = pfd.Init(&attr)137	for i := 0; i < len(logbuf); i++ {138		if logbuf[i] == 0 {139			log = string(logbuf[:i])140			break141		}142	}143	if err != nil {144		return log, err145	}146	p.pfd = pfd147	return log, nil148}149// Socket represents a socket an eBPF program can be attached to.150//151// Note that implementations of syscall.RawConn also satisfy Socket.152type Socket interface {153	Control(fn func(fd uintptr)) error154}155// RawSocketFD is an implementation of Socket that uses a raw file descriptor.156type RawSocketFD int157// Control calls fn on raw. It always returns nil.158func (raw RawSocketFD) Control(fn func(fd uintptr)) error {159	fn(uintptr(raw))160	return nil161}162var errProgNotLoaded = errors.New("ebpf: program not loaded")163// AttachToSocket attaches the program to a socket.164//165// It sets the SO_ATTACH_BPF option, at the SOL_SOCKET level.166func (p *Prog) AttachToSocket(sock Socket) error {167	if p.pfd == nil {168		return errProgNotLoaded169	}170	var err error171	cerr := sock.Control(func(fd uintptr) {172		err = p.pfd.AttachToSocket(int(fd))173	})174	if cerr != nil {175		return cerr176	}177	return err178}179// AttachToCGroup attaches the program to a control group.180//181// TODO(acln): implement this182func (p *Prog) AttachToCGroup(fd int, typ AttachType, flag CGroupAttachFlag) error {183	return errNotImplemented184}185// DetachFromSocket detaches the program from the specified socket.186func (p *Prog) DetachFromSocket(sock Socket) error {187	if p.pfd == nil {188		return errProgNotLoaded189	}190	var err error191	cerr := sock.Control(func(fd uintptr) {192		err = p.pfd.DetachFromSocket(int(fd))193	})194	if cerr != nil {195		return cerr196	}197	return err198}199// TestRun specifies a test run for an eBPF program.200type TestRun struct {201	// Input contains the input for the eBPF program.202	Input []byte203	// Output is the memory area where the output of the204	// program will be stored.205	//206	// TODO(acln): document the ENOSPC207	Output []byte208	// Repeat configures the number of times the program is to be209	// executed. The default value of 0 means one execution.210	Repeat uint32211}212// TestResults holds the results of a test run.213type TestResults struct {214	// ReturnValue is the return value of the eBPF program.215	ReturnValue uint32216	// Duration is the total execution time, in nanoseconds.217	Duration uint32218	// Output is the output slice. It aliases TestRun.Output, but its219	// length is set to the length returned by the kernel.220	Output []byte221	// TestRun is the associated test run configuration.222	TestRun TestRun223}224// DoTestRun executes a test run of the program.225func (p *Prog) DoTestRun(tr TestRun) (*TestResults, error) {226	if p.pfd == nil {227		return nil, errProgNotLoaded228	}229	return p.pfd.DoTestRun(tr)230}231// Unload unloads the program from the kernel and releases the associated232// file descriptor.233func (p *Prog) Unload() error {234	if p.pfd == nil {235		return errProgNotLoaded236	}237	return p.pfd.Close()238}239// progFD is a low level wrapper around a bpf program file descriptor.240type progFD struct {241	bfd bpfFD242}243func (pfd *progFD) Init(attr *progLoadAttr) error {244	rawfd, err := loadProg(attr)245	if err != nil {246		return wrapCmdError(cmdProgLoad, err)247	}248	if err := pfd.bfd.Init(rawfd, unix.Close); err != nil {249		return err250	}251	// TODO(acln): what do we do about the attach type?252	return nil253}254func (pfd *progFD) AttachToSocket(sockfd int) error {255	return pfd.bfd.ProgAttach(sockfd, unix.SOL_SOCKET)256}257func (pfd *progFD) DetachFromSocket(sockfd int) error {258	return pfd.bfd.ProgDetach(sockfd, unix.SOL_SOCKET)259}260func (pfd *progFD) DoTestRun(tr TestRun) (*TestResults, error) {261	return pfd.bfd.ProgTestRun(tr)262}263func (pfd *progFD) Close() error {264	return pfd.bfd.Close()265}266type progLoadAttr struct {267	Type               ProgType268	InstructionCount   uint32269	Instructions       u64ptr270	License            u64ptr // pointer to null-terminated string271	LogLevel           uint32272	LogBufSize         uint32273	LogBuf             u64ptr274	KernelVersion      uint32275	Flags              uint32276	Name               objectName277	IfIndex            uint32278	ExpectedAttachType AttachType279}280func loadProg(attr *progLoadAttr) (int, error) {281	return bpf(cmdProgLoad, unsafe.Pointer(attr), unsafe.Sizeof(*attr))282}...

methods.go

Source:methods.go

...35// LookupMethod returns the implementation of the method of type T36// identified by (pkg, name).  It returns nil if the method exists but37// is abstract, and panics if T has no such method.38//39func (prog *Program) LookupMethod(T types.Type, pkg *types.Package, name string) *Function {40	sel := prog.MethodSets.MethodSet(T).Lookup(pkg, name)41	if sel == nil {42		panic(fmt.Sprintf("%s has no method %s", T, types.Id(pkg, name)))43	}44	return prog.MethodValue(sel)45}46// methodSet contains the (concrete) methods of a non-interface type.47type methodSet struct {48	mapping  map[string]*Function // populated lazily49	complete bool                 // mapping contains all methods50}51// Precondition: !isInterface(T).52// EXCLUSIVE_LOCKS_REQUIRED(prog.methodsMu)53func (prog *Program) createMethodSet(T types.Type) *methodSet {54	mset, ok := prog.methodSets.At(T).(*methodSet)55	if !ok {56		mset = &methodSet{mapping: make(map[string]*Function)}57		prog.methodSets.Set(T, mset)58	}59	return mset60}61// EXCLUSIVE_LOCKS_REQUIRED(prog.methodsMu)62func (prog *Program) addMethod(mset *methodSet, sel *types.Selection) *Function {63	if sel.Kind() == types.MethodExpr {64		panic(sel)65	}66	id := sel.Obj().Id()67	fn := mset.mapping[id]68	if fn == nil {69		obj := sel.Obj().(*types.Func)70		needsPromotion := len(sel.Index()) > 171		needsIndirection := !isPointer(recvType(obj)) && isPointer(sel.Recv())72		if needsPromotion || needsIndirection {73			fn = makeWrapper(prog, sel)74		} else {75			fn = prog.declaredFunc(obj)76		}77		if fn.Signature.Recv() == nil {78			panic(fn) // missing receiver79		}80		mset.mapping[id] = fn81	}82	return fn83}84// RuntimeTypes returns a new unordered slice containing all85// concrete types in the program for which a complete (non-empty)86// method set is required at run-time.87//88// Thread-safe.89//90// EXCLUSIVE_LOCKS_ACQUIRED(prog.methodsMu)91//92func (prog *Program) RuntimeTypes() []types.Type {93	prog.methodsMu.Lock()94	defer prog.methodsMu.Unlock()95	var res []types.Type96	prog.methodSets.Iterate(func(T types.Type, v interface{}) {97		if v.(*methodSet).complete {98			res = append(res, T)99		}100	})101	return res102}103// declaredFunc returns the concrete function/method denoted by obj.104// Panic ensues if there is none.105//106func (prog *Program) declaredFunc(obj *types.Func) *Function {107	if v := prog.packageLevelValue(obj); v != nil {108		return v.(*Function)109	}110	panic("no concrete method: " + obj.String())111}112// needMethodsOf ensures that runtime type information (including the113// complete method set) is available for the specified type T and all114// its subcomponents.115//116// needMethodsOf must be called for at least every type that is an117// operand of some MakeInterface instruction, and for the type of118// every exported package member.119//120// Precondition: T is not a method signature (*Signature with Recv()!=nil).121//122// Thread-safe.  (Called via emitConv from multiple builder goroutines.)123//124// TODO(adonovan): make this faster.  It accounts for 20% of SSA build time.125//126// EXCLUSIVE_LOCKS_ACQUIRED(prog.methodsMu)127//128func (prog *Program) needMethodsOf(T types.Type) {129	prog.methodsMu.Lock()130	prog.needMethods(T, false)131	prog.methodsMu.Unlock()132}133// Precondition: T is not a method signature (*Signature with Recv()!=nil).134// Recursive case: skip => don't create methods for T.135//136// EXCLUSIVE_LOCKS_REQUIRED(prog.methodsMu)137//138func (prog *Program) needMethods(T types.Type, skip bool) {139	// Each package maintains its own set of types it has visited.140	if prevSkip, ok := prog.runtimeTypes.At(T).(bool); ok {141		// needMethods(T) was previously called142		if !prevSkip || skip {143			return // already seen, with same or false 'skip' value144		}145	}146	prog.runtimeTypes.Set(T, skip)147	tmset := prog.MethodSets.MethodSet(T)148	if !skip && !isInterface(T) && tmset.Len() > 0 {149		// Create methods of T.150		mset := prog.createMethodSet(T)151		if !mset.complete {152			mset.complete = true153			n := tmset.Len()154			for i := 0; i < n; i++ {155				prog.addMethod(mset, tmset.At(i))156			}157		}158	}159	// Recursion over signatures of each method.160	for i := 0; i < tmset.Len(); i++ {161		sig := tmset.At(i).Type().(*types.Signature)162		prog.needMethods(sig.Params(), false)163		prog.needMethods(sig.Results(), false)164	}165	switch t := T.(type) {166	case *types.Basic:167		// nop168	case *types.Interface:169		// nop---handled by recursion over method set.170	case *types.Pointer:171		prog.needMethods(t.Elem(), false)172	case *types.Slice:173		prog.needMethods(t.Elem(), false)174	case *types.Chan:175		prog.needMethods(t.Elem(), false)176	case *types.Map:177		prog.needMethods(t.Key(), false)178		prog.needMethods(t.Elem(), false)179	case *types.Signature:180		if t.Recv() != nil {181			panic(fmt.Sprintf("Signature %s has Recv %s", t, t.Recv()))182		}183		prog.needMethods(t.Params(), false)184		prog.needMethods(t.Results(), false)185	case *types.Named:186		// A pointer-to-named type can be derived from a named187		// type via reflection.  It may have methods too.188		prog.needMethods(types.NewPointer(T), false)189		// Consider 'type T struct{S}' where S has methods.190		// Reflection provides no way to get from T to struct{S},191		// only to S, so the method set of struct{S} is unwanted,192		// so set 'skip' flag during recursion.193		prog.needMethods(t.Underlying(), true)194	case *types.Array:195		prog.needMethods(t.Elem(), false)196	case *types.Struct:197		for i, n := 0, t.NumFields(); i < n; i++ {198			prog.needMethods(t.Field(i).Type(), false)199		}200	case *types.Tuple:201		for i, n := 0, t.Len(); i < n; i++ {202			prog.needMethods(t.At(i).Type(), false)203		}204	default:205		panic(T)206	}207}...

Type

Using AI Code Generation

1import "fmt"2func main() {3  a.Type()4}5import "fmt"6func main() {7  a.Type()8}9import "fmt"10func main() {11  a.Type()12}13import "fmt"14func main() {15  a.Type()16}17import "fmt"18func main() {19  a.Type()20}21import "fmt"22func main() {23  a.Type()24}25import "fmt"26func main() {27  a.Type()28}29import "fmt"30func main() {31  a.Type()32}33import "fmt"34func main() {35  a.Type()36}37import "fmt"38func main() {39  a.Type()40}41import "fmt"42func main() {43  a.Type()44}45import "fmt"46func main() {47  a.Type()48}49import "fmt"50func main() {51  a.Type()52}53import

Type

Using AI Code Generation

1import (2func main() {3	p := prog.Prog{}4	p.Type()5}6import "fmt"7type Prog struct{}8func (p Prog) Type() {9	fmt.Println("I am a Prog")10}11When we import a package using the relative path, the package is available at the same level as the file importing it. The relative path starts with the current directory. The re

Type

Using AI Code Generation

1import "fmt"2type prog struct {3}4func main() {5p1 := prog{6}7p1.Type()8}9func (p prog) Type() {10fmt.Println("Type method:", p.language, p.rating)11}

Type

Using AI Code Generation

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

Type

Using AI Code Generation

1import "fmt"2func main() {3    p.Type()4}5import "fmt"6type prog struct{}7func (p prog) Type() {8    fmt.Println("I am a prog type")9}10prog.go:10: cannot use p (type prog) as type prog in argument to Type:11    prog does not implement prog (missing Type method)12import "fmt"13type prog struct{}14func (p prog) Type() {15    fmt.Println("I am a prog type")16}17func (p prog) Type() {18    fmt.Println("I am a prog type")19}20prog.go:10: cannot use p (type prog) as type prog in argument to Type:21    prog does not implement prog (missing Type method)22import "fmt"23type prog struct{}24func (p prog) Type() {25    fmt.Println("I am a prog type")26}27func (p prog) Type() {28    fmt.Println("I am a prog type")29}30prog.go:10: cannot use p (type prog) as type prog in argument to Type:31    prog does not implement prog (missing Type method)32import "fmt"33type prog struct{}34func (p prog) Type() {35    fmt.Println("I am a prog

Type

Using AI Code Generation

1import "fmt"2import "GoLang/2"3func main() {4    fmt.Println(x)5}6type Type struct {7}8func (t Type) Type() int {9}10type Type struct {11}12func (t Type) Type() int {13}14type Type struct {15}16func (t Type) Type() int {17}18type Type struct {19}20func (t Type) Type() int {21}

Type

Using AI Code Generation

1import (2func main() {3	p1 = prog{10, "GoLang"}4	fmt.Println("p1 = ", p1)5	fmt.Println("p1.id = ", p1.id)6	fmt.Println("p1.name = ", p1.name)7	p1.Type()8}9import (10func main() {11	p1 = prog{10, "GoLang"}12	fmt.Println("p1 = ", p1)13	fmt.Println("p1.id = ", p1.id)14	fmt.Println("p1.name = ", p1.name)15	p1.Type()16}17import (18func main() {19	p1 = prog{10, "GoLang"}20	fmt.Println("p1 = ", p1)21	fmt.Println("p1.id = ", p1.id)22	fmt.Println("p1.name = ", p1.name)23	p1.Type()24}25import (26func main() {27	p1 = prog{10, "GoLang"}28	fmt.Println("p1 = ", p1)29	fmt.Println("p1.id = ", p1.id)30	fmt.Println("p1.name = ", p1.name)31	p1.Type()32}33import (34func main() {35	p1 = prog{10, "GoLang"}36	fmt.Println("p1 = ", p1)37	fmt.Println("p1.id = ", p1.id)38	fmt.Println("p1.name = ", p1.name)39	p1.Type()40}

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