if u, ok := userMap.Load(h.Uid); ok {
			h.Uname = u.(string)
		} else if u, err := user.LookupId(strconv.Itoa(h.Uid)); err == nil {
			h.Uname = u.Username
			userMap.Store(h.Uid, h.Uname)
		}
		if g, ok := groupMap.Load(h.Gid); ok {
			h.Gname = g.(string)
		} else if g, err := user.LookupGroupId(strconv.Itoa(h.Gid)); err == nil {
			h.Gname = g.Name
			groupMap.Store(h.Gid, h.Gname)
		}
	}
	h.AccessTime = statAtime(sys)

		"avx512enc/avx512_bitalg",
		"avx512enc/avx512_ifma",
		"avx512enc/avx512_vbmi",
		"avx512enc/avx512_vbmi2",
		"avx512enc/avx512_vnni",
		"avx512enc/avx512_vpopcntdq",
	}
	for _, name := range filenames {
		testEndToEnd(t, "amd64", name)
	}
}

func TestAMD64Errors(t *testing.T) {
	testErrors(t, "amd64", "amd64error")
}

func TestAMD64DynLinkErrors(t *testing.T) {

	if err != nil {
		return fmt.Errorf("unable to find %d tasks: %v", pid, err)
	}
	expectedProc := fmt.Sprintf("Pid:\t%d", pid)
	foundAThread := false
	for _, f := range fs {
		tf := fmt.Sprintf("/proc/%s/status", f.Name())
		d, err := os.ReadFile(tf)
		if err != nil {
			// There are a surprising number of ways this
			// can error out on linux.  We've seen all of
			// the following, so treat any error here as

		w.emitf("type %s = %s", name, w.typeString(typ))
		return
	}
	if tparams := obj.Type().(*types.Named).TypeParams(); tparams != nil {
		var buf bytes.Buffer
		buf.WriteString(name)
		w.writeTypeParams(&buf, tparams, true)
		name = buf.String()
	}
	switch typ := typ.Underlying().(type) {
	case *types.Struct:
		w.emitStructType(name, typ)
	case *types.Interface:
		w.emitIfaceType(name, typ)

	for _, test := range []struct {
		name string
		h    *Header
	}{{
		name: "name too long",
		h:    &Header{Name: strings.Repeat("a", maxSpecialFileSize)},
	}, {
		name: "linkname too long",
		h:    &Header{Linkname: strings.Repeat("a", maxSpecialFileSize)},
	}, {
		name: "uname too long",
		h:    &Header{Uname: strings.Repeat("a", maxSpecialFileSize)},
	}, {
		name: "gname too long",

		if err != nil {
			t.Error(err)
			continue
		}
		if strings.Contains(fi.Name(), "/") {
			t.Errorf("FileInfo of %q contains slash: %q", v.h.Name, fi.Name())
		}
		name := path.Base(v.h.Name)
		if fi.IsDir() {
			name += "/"
		}
		if got, want := h2.Name, name; got != want {
			t.Errorf("i=%d: Name: got %v, want %v", i, got, want)
		}
		if got, want := h2.Size, v.h.Size; got != want {

// It returns a [Writer] to which the file contents should be written.
// The file contents will be compressed using the [Deflate] method.
// The name must be a relative path: it must not start with a drive
// letter (e.g. C:) or leading slash, and only forward slashes are
// allowed. To create a directory instead of a file, add a trailing
// slash to the name.

			continue
		}
		pc, _ := strconv.ParseUint(strings.TrimPrefix(p, "0x"), 16, 64)
		file, line, fn := tab.PCToLine(pc)
		name := "?"
		if fn != nil {
			name = fn.Name
		} else {
			file = "?"
			line = 0
		}
		fmt.Fprintf(stdout, "%s\n%s:%d\n", name, file, line)
	}
	stdout.Flush()

	default:
		return nil, nil // Not a PAX format GNU sparse file.
	}
	hdr.Format.mayOnlyBe(FormatPAX)

	// Update hdr from GNU sparse PAX headers.
	if name := hdr.PAXRecords[paxGNUSparseName]; name != "" {
		hdr.Name = name
	}
	size := hdr.PAXRecords[paxGNUSparseSize]
	if size == "" {
		size = hdr.PAXRecords[paxGNUSparseRealSize]
	}
	if size != "" {
		n, err := strconv.ParseInt(size, 10, 64)

// ARM64RegisterArrangement constructs an ARM64 vector register arrangement.
func ARM64RegisterArrangement(reg int16, name, arng string) (int64, error) {
	var curQ, curSize uint16
	if name[0] != 'V' {
		return 0, errors.New("expect V0 through V31; found: " + name)
	}
	if reg < 0 {
		return 0, errors.New("invalid register number: " + name)
	}
	switch arng {
	case "B8":
		curSize = 0
		curQ = 0
	case "B16":
		curSize = 0