// netbsdMstart0 is the function call that starts executing a newly
// created thread. On NetBSD, a new thread inherits the signal stack
// of the creating thread. That confuses minit, so we remove that
// signal stack here before calling the regular mstart. It's a bit
// baroque to remove a signal stack here only to add one in minit, but
// it's a simple change that keeps NetBSD working like other OS's.
// At this point all signals are blocked, so there is no race.

if($ARGV[0] eq "-plan9") {
	$plan9 = 1;
	shift;
}
if($ARGV[0] eq "-darwin") {
	$darwin = 1;
	$libc = 1;
	shift;
}
if($ARGV[0] eq "-openbsd") {
	$openbsd = 1;
	shift;
}
if($ARGV[0] eq "-netbsd") {
	$netbsd = 1;
	shift;
}
if($ARGV[0] eq "-dragonfly") {
	$dragonfly = 1;
	shift;
}
if($ARGV[0] eq "-arm") {
	$arm = 1;
	shift;
}
if($ARGV[0] eq "-libc") {
	$libc = 1;
	shift;
}

func checkGdbEnvironment(t *testing.T) {
	testenv.MustHaveGoBuild(t)
	switch runtime.GOOS {
	case "darwin":
		t.Skip("gdb does not work on darwin")
	case "netbsd":
		t.Skip("gdb does not work with threads on NetBSD; see https://golang.org/issue/22893 and https://gnats.netbsd.org/52548")
	case "linux":
		if runtime.GOARCH == "ppc64" {
			t.Skip("skipping gdb tests on linux/ppc64; see https://golang.org/issue/17366")
		}

		case "darwin", "ios", "dragonfly", "freebsd", "netbsd", "openbsd":
			var st syscall.Stat_t
			err := ignoringEINTR(func() error {
				return syscall.Fstat(fd, &st)
			})
			typ := st.Mode & syscall.S_IFMT
			// Don't try to use kqueue with regular files on *BSDs.
			// On FreeBSD a regular file is always
			// reported as ready for writing.
			// On Dragonfly, NetBSD and OpenBSD the fd is signaled

var trailingPort = regexp.MustCompile(`:([0-9]+)$`)

var osDefaultInheritEnv = func() []string {
	switch runtime.GOOS {
	case "darwin", "ios":
		return []string{"DYLD_LIBRARY_PATH"}
	case "android", "linux", "freebsd", "netbsd", "openbsd":
		return []string{"LD_LIBRARY_PATH"}
	case "hpux":
		return []string{"LD_LIBRARY_PATH", "SHLIB_PATH"}
	case "irix":
		return []string{"LD_LIBRARY_PATH", "LD_LIBRARYN32_PATH", "LD_LIBRARY64_PATH"}

// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build (darwin || dragonfly || freebsd || (linux && !android) || netbsd || openbsd) && cgo

// Note that this test does not work on Solaris: issue #22849.
// Don't run the test on Android because at least some versions of the
// C library do not define the posix_openpt function.

package signal_test

	"sync"
	"unsafe"
)

var (
	Stdin  = 0
	Stdout = 1
	Stderr = 2
)

const (
	darwin64Bit = (runtime.GOOS == "darwin" || runtime.GOOS == "ios") && sizeofPtr == 8
	netbsd32Bit = runtime.GOOS == "netbsd" && sizeofPtr == 4
)

// clen returns the index of the first NULL byte in n or len(n) if n contains no NULL byte.
func clen(n []byte) int {
	if i := bytealg.IndexByte(n, 0); i != -1 {
		return i
	}
	return len(n)

		t.Fatalf("Lstat %q succeeded after RemoveAll", path)
	}
}

func TestRemoveAllLongPath(t *testing.T) {
	switch runtime.GOOS {
	case "aix", "darwin", "ios", "dragonfly", "freebsd", "linux", "netbsd", "openbsd", "illumos", "solaris":
		break
	default:
		t.Skip("skipping for not implemented platforms")
	}

	prevDir, err := Getwd()
	if err != nil {
		t.Fatalf("Could not get wd: %s", err)
	}

// timeoutUpperBound returns the maximum time that we expect a timeout of
// duration d to take to return the caller.
func timeoutUpperBound(d time.Duration) time.Duration {
	switch runtime.GOOS {
	case "openbsd", "netbsd":
		// NetBSD and OpenBSD seem to be unable to reliably hit deadlines even when
		// the absolute durations are long.
		// In https://build.golang.org/log/c34f8685d020b98377dd4988cd38f0c5bd72267e,

// testPCs returns two PCs and two corresponding memory mappings
// to use in test profiles.
func testPCs(t *testing.T) (addr1, addr2 uint64, map1, map2 *profile.Mapping) {
	switch runtime.GOOS {
	case "linux", "android", "netbsd":
		// Figure out two addresses from /proc/self/maps.
		mmap, err := os.ReadFile("/proc/self/maps")
		if err != nil {
			t.Fatal(err)
		}
		var mappings []*profile.Mapping
		id := uint64(1)