for tag := range allTags {
		p.AllTags = append(p.AllTags, tag)
	}
	sort.Strings(p.AllTags)

	if len(p.CgoFiles) > 0 {
		p.SFiles = append(p.SFiles, Sfiles...)
		sort.Strings(p.SFiles)
	} else {
		p.IgnoredOtherFiles = append(p.IgnoredOtherFiles, Sfiles...)
		sort.Strings(p.IgnoredOtherFiles)
	}

	if badGoError != nil {
		return p, badGoError
	}

		return !strings.HasPrefix(p, ".") && (!strings.HasPrefix(p, "_") || !strings.HasSuffix(p, ".go"))
	})

	// Add generated files for this package.
	for _, gt := range gentab {
		if gt.pkg == pkg {
			files = append(files, gt.file)
		}
	}
	files = uniq(files)

	// Convert to absolute paths.
	for i, p := range files {
		if !filepath.IsAbs(p) {
			files[i] = pathf("%s/%s", dir, p)

	abiSuff      = re(`^(.+)<(ABI.+)>$`)
)

func run(pass *analysis.Pass) (interface{}, error) {
	// No work if no assembly files.
	var sfiles []string
	for _, fname := range pass.OtherFiles {
		if strings.HasSuffix(fname, ".s") {
			sfiles = append(sfiles, fname)
		}
	}
	if sfiles == nil {
		return nil, nil
	}

	// Gather declarations. knownFunc[name][arch] is func description.

// of the index at which each CU begins in runtime.cutab.
//
// Function objects keep track of the files they reference to print the stack.
// This function creates a per-CU list of filenames if CU[M] references
// files[1-N], the following is generated:
//
//	runtime.cutab:
//	  CU[M]
//	   offsetToFilename[0]
//	   offsetToFilename[1]
//	   ..
//

	{"kern.mbstat", []_C_int{1, 59}},
	{"kern.msgbuf", []_C_int{1, 48}},
	{"kern.msgbufsize", []_C_int{1, 38}},
	{"kern.nchstats", []_C_int{1, 41}},
	{"kern.netlivelocks", []_C_int{1, 76}},
	{"kern.nfiles", []_C_int{1, 56}},
	{"kern.ngroups", []_C_int{1, 18}},
	{"kern.nosuidcoredump", []_C_int{1, 32}},
	{"kern.nprocs", []_C_int{1, 47}},
	{"kern.nthreads", []_C_int{1, 26}},
	{"kern.numvnodes", []_C_int{1, 58}},

	{"kern.mbstat", []_C_int{1, 59}},
	{"kern.msgbuf", []_C_int{1, 48}},
	{"kern.msgbufsize", []_C_int{1, 38}},
	{"kern.nchstats", []_C_int{1, 41}},
	{"kern.netlivelocks", []_C_int{1, 76}},
	{"kern.nfiles", []_C_int{1, 56}},
	{"kern.ngroups", []_C_int{1, 18}},
	{"kern.nosuidcoredump", []_C_int{1, 32}},
	{"kern.nprocs", []_C_int{1, 47}},
	{"kern.nthreads", []_C_int{1, 26}},
	{"kern.numvnodes", []_C_int{1, 58}},

//  | size: size of this blob in bytes
//  | packagepath: <path to p>
//  | modulepath: <modpath for p>
//  | nfiles: 1
//  | nfunctions: 2
//  --func offsets table------
//  <offset to func 0>
//  <offset to func 1>
//  --string table (contains all files and functions)------
//  | <uleb128 len> 4
//  | <data> "p.go"
//  | <uleb128 len> 5
//  | <data> "small"
//  | <uleb128 len> 6

		{"Package.Directives", Field, 21},
		{"Package.Doc", Field, 0},
		{"Package.EmbedPatternPos", Field, 16},
		{"Package.EmbedPatterns", Field, 16},
		{"Package.FFiles", Field, 7},
		{"Package.GoFiles", Field, 0},
		{"Package.Goroot", Field, 0},
		{"Package.HFiles", Field, 0},
		{"Package.IgnoredGoFiles", Field, 1},
		{"Package.IgnoredOtherFiles", Field, 16},
		{"Package.ImportComment", Field, 4},

		}
		sort.Sort(entries)
		total := uint64(0)            // sum over files of maxline(file) - minline(file)
		maxfile := int32(0)           // max(file indices)
		minline := uint32(0xffffffff) // min over files of minline(file)
		maxline := uint32(0)          // max over files of maxline(file)
		for _, v := range entries {
			if f.pass.stats > 1 {

    assertEquals("gz", Files.getFileExtension("blah.tar.gz"));
    assertEquals("", Files.getFileExtension("/"));
    assertEquals("", Files.getFileExtension("."));
    assertEquals("", Files.getFileExtension(".."));
    assertEquals("", Files.getFileExtension("..."));
    assertEquals("", Files.getFileExtension("blah"));
    assertEquals("", Files.getFileExtension("blah."));
    assertEquals("", Files.getFileExtension(".blah."));