}
	n := 1

	// Read timestamp diff.
	ts, nb := binary.Uvarint(b[n:])
	if nb <= 0 {
		return 0, 0, fmt.Errorf("found invalid uvarint for timestamp")
	}
	n += nb

	// Read the rest of the arguments.
	for i := 0; i < len(spec.Args)-1; i++ {
		arg, nb := binary.Uvarint(b[n:])
		if nb <= 0 {
			return 0, 0, fmt.Errorf("found invalid uvarint")
		}
		e.args[i] = arg
		n += nb
	}
	return n, timestamp(ts), nil

	for len(b) > 0 {
		t, n := binary.Uvarint(b)
		if n < 0 {
			break
		}
		b = b[n:]

		typ := ChecksumType(t)
		length := typ.RawByteLen()
		if length == 0 || len(b) < length {
			break
		}
		cs := base64.StdEncoding.EncodeToString(b[:length])
		b = b[length:]
		if typ.Is(ChecksumMultipart) {
			t, n := binary.Uvarint(b)
			if n < 0 {
				break
			}

func writeInt(w io.Writer, buf []byte, x int) error {
	binary.PutVarint(buf, int64(x))
	_, err := w.Write(buf[0:binary.MaxVarintLen64])
	return err
}

// readInt reads an int x from r using buf to buffer the read and returns x.
func readInt(r io.Reader, buf []byte) (int64, error) {
	_, err := io.ReadFull(r, buf[0:binary.MaxVarintLen64]) // ok to continue with error
	x, _ := binary.Varint(buf)
	return x, err
}

		switch m {
		case plan9obj.Magic386, plan9obj.MagicAMD64, plan9obj.MagicARM:
			return true
		}
	}
	return false
}

func decodeString(data []byte) (s string, rest []byte) {
	u, n := binary.Uvarint(data)
	if n <= 0 || u > uint64(len(data)-n) {
		return "", nil
	}
	return string(data[n : uint64(n)+u]), data[uint64(n)+u:]
}

// readString returns the string at address addr in the executable x.

	r.obj(name)
}

func (p *iimporter) stringAt(off uint64) string {
	if s, ok := p.stringCache[off]; ok {
		return s
	}

	slen, n := binary.Uvarint(p.stringData[off:])
	if n <= 0 {
		errorf("varint failed")
	}
	spos := off + uint64(n)
	s := string(p.stringData[spos : spos+slen])
	p.stringCache[off] = s
	return s
}

func (p *iimporter) pkgAt(off uint64) *types.Package {

var errMalformedVarint = errors.New("malformatted base-128 varint")

// readVal reads unsigned base-128 value from r.
func (p *parser) readVal() (uint64, error) {
	v, n := binary.Uvarint(p.data[p.off:])
	if n <= 0 {
		return 0, errMalformedVarint
	}
	p.off += n
	return v, nil
}

func readValFrom(buf []byte) (v uint64, rem []byte, err error) {
	v, n := binary.Uvarint(buf)
	if n <= 0 {

func (d *decoder) stringTableAt(off int) string {
	if off < 0 || off >= len(d.str) {
		panic(errCorrupt)
	}
	s := d.str[off:]
	v, n := binary.Uvarint(s)
	if n <= 0 || v > uint64(len(s[n:])) {
		panic(errCorrupt)
	}
	return asString(s[n : n+int(v)])
}

// A reader reads sequential fields from a section of the index format.
type reader struct {

	// Write the buffer's header.
	if exp == traceNoExperiment {
		w.byte(byte(traceEvEventBatch))
	} else {
		w.byte(byte(traceEvExperimentalBatch))
		w.byte(byte(exp))
	}
	w.varint(uint64(w.gen))
	w.varint(uint64(mID))
	w.varint(uint64(ts))
	w.traceBuf.lenPos = w.varintReserve()
	return w
}

// traceBufQueue is a FIFO of traceBufs.
type traceBufQueue struct {
	head, tail *traceBuf
}

	// HasData is true if the event has trailer consisting of a
	// varint length followed by unencoded bytes of some data.
	//
	// An event may not be both a timed event and have data.
	HasData bool

	// IsStack indicates that the event represents a complete
	// stack trace. Specifically, it means that after the arguments
	// there's a varint length, followed by 4*length varints. Each
	// group of 4 represents the PC, file ID, func ID, and line number

	}

	x := base.Ctxt.Lookup(s.curfn.LSym.Name + ".opendefer")
	x.Set(obj.AttrContentAddressable, true)
	s.curfn.LSym.Func().OpenCodedDeferInfo = x

	off := 0
	off = objw.Uvarint(x, off, uint64(-s.deferBitsTemp.FrameOffset()))
	off = objw.Uvarint(x, off, uint64(-firstOffset))
}

// buildssa builds an SSA function for fn.
// worker indicates which of the backend workers is doing the processing.