EvGoUnblock         = 21 // goroutine is unblocked [timestamp, goroutine id, seq, stack]
	EvGoBlockSend       = 22 // goroutine blocks on chan send [timestamp, stack]
	EvGoBlockRecv       = 23 // goroutine blocks on chan recv [timestamp, stack]
	EvGoBlockSelect     = 24 // goroutine blocks on select [timestamp, stack]
	EvGoBlockSync       = 25 // goroutine blocks on Mutex/RWMutex [timestamp, stack]

func IsFunctionNamed(f *types.Func, pkgPath string, names ...string) bool {
	if f == nil {
		return false
	}
	if f.Pkg() == nil || f.Pkg().Path() != pkgPath {
		return false
	}
	if f.Type().(*types.Signature).Recv() != nil {
		return false
	}
	for _, n := range names {
		if f.Name() == n {
			return true
		}
	}
	return false
}

//         Underlying typeOff
//
//         Methods []struct{  // omitted if Underlying is an interface type
//             Pos       Pos
//             Name      stringOff
//             Recv      Param
//             Signature Signature
//         }
//     }
//
//     type Alias struct {
//         Tag  byte // 'A'
//         Pos  Pos
//         Type typeOff
//     }
//

		foundTest := false
		for _, d := range code.Decls {
			fd, ok := d.(*ast.FuncDecl)
			if !ok {
				continue
			}
			if !strings.HasPrefix(fd.Name.Name, "Test") {
				continue
			}
			if fd.Recv != nil {
				continue
			}
			if fd.Type.Results != nil {
				continue
			}
			if len(fd.Type.Params.List) != 1 {
				continue
			}
			p := fd.Type.Params.List[0]
			if len(p.Names) != 1 {

		// are rare.)
		name := ""
		if len(params) > 0 && params[0].name != "" {
			// name needed
			name = sig.recv.name
			if name == "" {
				name = "_"
			}
		}
		params = append([]*Var{NewVar(sig.recv.pos, sig.recv.pkg, name, x.typ)}, params...)
		x.mode = value
		x.typ = &Signature{
			tparams:  sig.tparams,
			params:   NewTuple(params...),
			results:  sig.results,

		// are rare.)
		name := ""
		if len(params) > 0 && params[0].name != "" {
			// name needed
			name = sig.recv.name
			if name == "" {
				name = "_"
			}
		}
		params = append([]*Var{NewVar(sig.recv.pos, sig.recv.pkg, name, x.typ)}, params...)
		x.mode = value
		x.typ = &Signature{
			tparams:  sig.tparams,
			params:   NewTuple(params...),
			results:  sig.results,

 func (v <type 1>) OverflowInt (x <type -4>) <type -15>;
 func (v <type 1>) OverflowUint (x <type -8>) <type -15>;
 func (v <type 1>) Pointer () <type -13>;
 func (v <type 1>) Recv () (x <type 1>, ok <type -15>);
 func (v <type 1>) .reflect.recv (nb <type -15>) (val <type 1>, ok <type -15>);
 func (v <type 1>) Send (x <type 1>);
 func (v <type 1>) .reflect.send (x <type 1>, nb <type -15>) (selected <type -15>);

		buf.WriteString("map[")
		WriteExpr(buf, x.Key)
		buf.WriteByte(']')
		WriteExpr(buf, x.Value)

	case *ast.ChanType:
		var s string
		switch x.Dir {
		case ast.SEND:
			s = "chan<- "
		case ast.RECV:
			s = "<-chan "
		default:
			s = "chan "
		}
		buf.WriteString(s)
		WriteExpr(buf, x.Value)
	}
}

func writeSigExpr(buf *bytes.Buffer, sig *ast.FuncType) {
	buf.WriteByte('(')

	SizeofBpfStat    = 0x80
	SizeofBpfProgram = 0x10
	SizeofBpfInsn    = 0x8
	SizeofBpfHdr     = 0x20
)

type BpfVersion struct {
	Major uint16
	Minor uint16
}

type BpfStat struct {
	Recv    uint64
	Drop    uint64
	Capt    uint64
	Padding [13]uint64
}

type BpfProgram struct {
	Len       uint32
	Pad_cgo_0 [4]byte
	Insns     *BpfInsn
}

type BpfInsn struct {

	SizeofBpfStat    = 0x8
	SizeofBpfProgram = 0x8
	SizeofBpfInsn    = 0x8
	SizeofBpfHdr     = 0x14
)

type BpfVersion struct {
	Major uint16
	Minor uint16
}

type BpfStat struct {
	Recv uint32
	Drop uint32
}

type BpfProgram struct {
	Len   uint32
	Insns *BpfInsn
}

type BpfInsn struct {
	Code uint16
	Jt   uint8
	Jf   uint8
	K    uint32
}