}
	}
}

func TestTimePprof(t *testing.T) {
	// This test is unreliable on any system in which nanotime
	// calls into libc.
	switch runtime.GOOS {
	case "aix", "darwin", "illumos", "openbsd", "solaris":
		t.Skipf("skipping on %s because nanotime calls libc", runtime.GOOS)
	}

	// Pass GOTRACEBACK for issue #41120 to try to get more
	// information on timeout.

	switch GOOS {
	case "aix", "darwin", "illumos", "ios", "solaris", "windows":
		return true
	case "openbsd":
		return GOARCH != "mips64"
	}
	return false
}

// mStackIsSystemAllocated indicates whether this runtime starts on a
// system-allocated stack.
func mStackIsSystemAllocated() bool {
	switch GOOS {
	case "aix", "darwin", "plan9", "illumos", "ios", "solaris", "windows":
		return true

	} else {
		switch GOOS {
		case "darwin", "ios":
			if GOARCH == "arm64" {
				libbase += "_shared"
			}
		case "dragonfly", "freebsd", "linux", "netbsd", "openbsd", "solaris", "illumos":
			libbase += "_shared"
		}
	}
	libgodir = filepath.Join(GOPATH, "pkg", libbase, "testcarchive")
	cc = append(cc, "-I", libgodir)

// Event Ports

type fileObjCookie struct {
	fobj   *fileObj
	cookie interface{}
}

// EventPort provides a safe abstraction on top of Solaris/illumos Event Ports.
type EventPort struct {
	port  int
	mu    sync.Mutex
	fds   map[uintptr]*fileObjCookie
	paths map[string]*fileObjCookie

	wg.Wait()
}

// Test that reading from a pipe doesn't use up a thread.
func TestPipeThreads(t *testing.T) {
	switch runtime.GOOS {
	case "illumos", "solaris":
		t.Skip("skipping on Solaris and illumos; issue 19111")
	case "windows":
		t.Skip("skipping on Windows; issue 19098")
	case "plan9":
		t.Skip("skipping on Plan 9; does not support runtime poller")
	case "js":

#endif
needtls:
#ifdef GOOS_plan9
	// skip TLS setup on Plan 9
	JMP ok
#endif
#ifdef GOOS_solaris
	// skip TLS setup on Solaris
	JMP ok
#endif
#ifdef GOOS_illumos
	// skip TLS setup on illumos
	JMP ok
#endif
#ifdef GOOS_darwin
	// skip TLS setup on Darwin
	JMP ok
#endif
#ifdef GOOS_openbsd
	// skip TLS setup on OpenBSD
	JMP ok
#endif

#ifdef GOOS_windows

	switch runtime.GOOS {
	case "plan9":
		// Profiling unimplemented.
		return true
	case "aix":
		// See https://golang.org/issue/45170.
		return true
	case "ios", "dragonfly", "netbsd", "illumos", "solaris":
		// See https://golang.org/issue/13841.
		return true
	case "openbsd":
		if runtime.GOARCH == "arm" || runtime.GOARCH == "arm64" {
			// See https://golang.org/issue/13841.
			return true
		}

//
// Using GOOS=android matches build tags and files as for GOOS=linux
// in addition to android tags and files.
//
// Using GOOS=illumos matches build tags and files as for GOOS=solaris
// in addition to illumos tags and files.
//
// Using GOOS=ios matches build tags and files as for GOOS=darwin
// in addition to ios tags and files.
//

// when executed in a deleted directory on Linux.
func TestExecInDeletedDir(t *testing.T) {
	switch runtime.GOOS {
	case "windows", "plan9",
		"aix",                // Fails with "device busy".
		"solaris", "illumos": // Fails with "invalid argument".
		t.Skipf("%v does not support removing the current working directory", runtime.GOOS)
	}
	tg := testgo(t)
	defer tg.cleanup()

	wd, err := os.Getwd()
	tg.check(err)

	// This is read by readGccgoArchive in cmd/internal/buildid/buildid.go.
	if a.buildID != "" && cfg.BuildToolchainName == "gccgo" {
		switch cfg.Goos {
		case "aix", "android", "dragonfly", "freebsd", "illumos", "linux", "netbsd", "openbsd", "solaris":
			asmfile, err := b.gccgoBuildIDFile(a)
			if err != nil {
				return err
			}
			ofiles, err := BuildToolchain.asm(b, a, []string{asmfile})
			if err != nil {