skip := 0
	if wd+2+int(b.hdrsize)+len(stk) > len(b.data) {
		b.data[wd] = 0
		skip = len(b.data) - wd
		nd -= skip
		wd = 0
	}
	data := b.data[wd:]
	data[0] = uint64(2 + b.hdrsize + uintptr(len(stk))) // length
	data[1] = uint64(now)                               // time stamp
	// header, zero-padded
	i := copy(data[2:2+b.hdrsize], hdr)
	clear(data[2+i : 2+b.hdrsize])
	for i, pc := range stk {

		Bss:         ph.Bss,
		Entry:       uint64(ph.Entry),
		PtrSize:     4,
		LoadAddress: 0x1000,
		HdrSize:     4 * 8,
	}}

	if ph.Magic&Magic64 != 0 {
		if err := binary.Read(sr, binary.BigEndian, &f.Entry); err != nil {
			return nil, err
		}
		f.PtrSize = 8
		f.LoadAddress = 0x200000
		f.HdrSize += 8
	}

	var sects = []struct {
		name string
		size uint32
	}{
		{"text", ph.Text},

		}
		syms = append(syms, sym)
	}

	return syms, nil
}

func (f *plan9File) pcln() (textStart uint64, symtab, pclntab []byte, err error) {
	textStart = f.plan9.LoadAddress + f.plan9.HdrSize
	if pclntab, err = loadPlan9Table(f.plan9, "runtime.pclntab", "runtime.epclntab"); err != nil {
		// We didn't find the symbols, so look for the names used in 1.3 and earlier.

// license that can be found in the LICENSE file.

package runtime_test

import (
	"reflect"
	. "runtime"
	"testing"
	"time"
	"unsafe"
)

func TestProfBuf(t *testing.T) {
	const hdrSize = 2

	write := func(t *testing.T, b *ProfBuf, tag unsafe.Pointer, now int64, hdr []uint64, stk []uintptr) {
		b.Write(&tag, now, hdr, stk)
	}
	read := func(t *testing.T, b *ProfBuf, data []uint64, tags []unsafe.Pointer) {

        if ( size < 33 || ( 4 + size ) > this.sbuf.length ) {
            throw new IOException("Invalid payload size: " + size);
        }
        int hdrSize = this.smb2 ? Smb2Constants.SMB2_HEADER_LENGTH : SMB1_HEADER_LENGTH;
        readn(this.in, this.sbuf, 4 + hdrSize, size - hdrSize);
        log.trace("Read negotiate response");
    }


    /**
     * @param first
     * @param n
     * @return

type FileHandle struct {
	*fileHandle
}

// NewFileHandle constructs a FileHandle.
func NewFileHandle(handleType int32, handle []byte) FileHandle {
	const hdrSize = unsafe.Sizeof(fileHandle{})
	buf := make([]byte, hdrSize+uintptr(len(handle)))
	copy(buf[hdrSize:], handle)
	fh := (*fileHandle)(unsafe.Pointer(&buf[0]))
	fh.Type = handleType
	fh.Bytes = uint32(len(handle))
	return FileHandle{fh}
}

func Fastrand64() uint64        { return rand() }
func Fastrandn(n uint32) uint32 { return randn(n) }

type ProfBuf profBuf

func NewProfBuf(hdrsize, bufwords, tags int) *ProfBuf {
	return (*ProfBuf)(newProfBuf(hdrsize, bufwords, tags))
}

func (p *ProfBuf) Write(tag *unsafe.Pointer, now int64, hdr []uint64, stk []uintptr) {
	(*profBuf)(p).write(tag, now, hdr, stk)
}

const (

pkg debug/elf, var ErrNoSymbols error

# CL 106460044 debug/plan9obj, cmd/addr2line: on Plan 9 use a.out header, Aram Hăvărneanu <******@****.***>
pkg debug/plan9obj, type FileHeader struct, HdrSize uint64
pkg debug/plan9obj, type FileHeader struct, LoadAddress uint64

# CL 122960043 encoding/xml: add InputOffset method to Decoder, Russ Cox <******@****.***>
pkg encoding/xml, method (*Decoder) InputOffset() int64

		{"File", Type, 3},
		{"File.FileHeader", Field, 3},
		{"File.Sections", Field, 3},
		{"FileHeader", Type, 3},
		{"FileHeader.Bss", Field, 3},
		{"FileHeader.Entry", Field, 3},
		{"FileHeader.HdrSize", Field, 4},
		{"FileHeader.LoadAddress", Field, 4},
		{"FileHeader.Magic", Field, 3},
		{"FileHeader.PtrSize", Field, 3},
		{"Magic386", Const, 3},
		{"Magic64", Const, 3},
		{"MagicAMD64", Const, 3},