}

	var mu sync.Mutex
	have := map[string]bool{
		"builtin": true, // ignore pseudo-package that exists only for documentation
	}
	addPkg := func(p string) {
		mu.Lock()
		m.Pkgs = append(m.Pkgs, p)
		mu.Unlock()
	}
	if !cfg.BuildContext.CgoEnabled {
		have["runtime/cgo"] = true // ignore during walk
	}

	type pruning int8
	const (
		pruneVendor = pruning(1 << iota)
		pruneGoMod
	)

	cmd.Env = append(cmd.Env, "GOOS=linux")
	cmd.Stderr = os.Stderr
	out, err := cmd.Output()
	if err != nil {
		log.Fatalf("loading package list: %v\n%s", err, out)
	}
	pkgs := strings.Split(strings.TrimSpace(string(out)), "\n")

	cmd = exec.Command(testenv.GoToolPath(t), "tool", "dist", "list")
	cmd.Stderr = os.Stderr
	out, err = cmd.Output()
	if err != nil {

}

func (mm *metaMerge) visitPackage(pd *decodemeta.CoverageMetaDataDecoder, pkgIdx uint32, pcombine bool) {
	p, ok := mm.pkm[pd.PackagePath()]
	if !ok {
		p = &pkstate{
			pkgIdx: uint32(len(mm.pkgs)),
		}
		mm.pkgs = append(mm.pkgs, p)
		mm.pkm[pd.PackagePath()] = p
		if pcombine {
			p.pcombinestate = new(pcombinestate)
			cmdb, err := encodemeta.NewCoverageMetaDataBuilder(pd.PackagePath(), pd.PackageName(), pd.ModulePath())

// first error encountered are returned.
func ParseDir(fset *token.FileSet, path string, filter func(fs.FileInfo) bool, mode Mode) (pkgs map[string]*ast.Package, first error) {
	list, err := os.ReadDir(path)
	if err != nil {
		return nil, err
	}

	pkgs = make(map[string]*ast.Package)
	for _, d := range list {
		if d.IsDir() || !strings.HasSuffix(d.Name(), ".go") {
			continue
		}

func loadTypes(path, pkgName string, v visitor) {
	fset := token.NewFileSet()

	filter := func(fi fs.FileInfo) bool {
		return strings.HasSuffix(fi.Name(), ".go")
	}
	pkgs, err := parser.ParseDir(fset, path, filter, 0)
	if err != nil {
		panic(err)
	}

	pkg := pkgs[pkgName]

	for _, f := range pkg.Files {
		ast.Walk(v, f)
	}
}

func TestMirrorWithReflect(t *testing.T) {

// will always include at least one package.
func (opts *goTest) packages() []string {
	pkgs := opts.pkgs
	if opts.pkg != "" {
		pkgs = append(pkgs[:len(pkgs):len(pkgs)], opts.pkg)
	}
	if len(pkgs) == 0 {
		panic("no packages")
	}
	return pkgs
}

// printSkip prints a skip message for all of goTest.
func (opts *goTest) printSkip(t *tester, msg string) {
	if t.json {

// As a side effect, buildStacks also constructs ld.pkgs,
// the list of all packages loaded.
func (ld *loader) buildStacks() {
	if len(ld.pkgs) > 0 {
		panic("buildStacks")
	}
	for _, pkg := range ld.roots {
		pkg.stack = pkg // sentinel to avoid processing in next loop
		ld.pkgs = append(ld.pkgs, pkg)
	}
	for i := 0; i < len(ld.pkgs); i++ { // not range: appending to ld.pkgs in loop
		pkg := ld.pkgs[i]

		"compress/flate.byLiteral.Less": true,
		"compress/flate.byLiteral.Swap": true,
	}

	notInlinedReason := make(map[string]string)
	pkgs := make([]string, 0, len(want))
	for pname, fnames := range want {
		pkgs = append(pkgs, pname)
		for _, fname := range fnames {
			fullName := pname + "." + fname
			if _, ok := notInlinedReason[fullName]; ok {
				t.Errorf("duplicate func: %s", fullName)

		case isExplicit[m]:
			io.WriteString(w, "## explicit\n")
		case goVersion != "":
			fmt.Fprintf(w, "## go %s\n", goVersion)
		}

		pkgs := modpkgs[m]
		sort.Strings(pkgs)
		for _, pkg := range pkgs {
			fmt.Fprintf(w, "%s\n", pkg)
			vendorPkg(vdir, pkg)
		}
	}

	if includeAllReplacements {
		// Record unused and wildcard replacements at the end of the modules.txt file:

// That is, the input a1 represents "go build pkgs" and the result represents "go build -buildmode=shared pkgs".
func (b *Builder) buildmodeShared(mode, depMode BuildMode, args []string, pkgs []*load.Package, a1 *Action) *Action {
	name, err := libname(args, pkgs)
	if err != nil {
		base.Fatalf("%v", err)
	}
	return b.linkSharedAction(mode, depMode, name, a1)
}