static void register_handler(void) __attribute__ ((constructor (200)));

static void register_handler() {
	struct sigaction sa;
	memset(&sa, 0, sizeof(sa));
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = SA_SIGINFO;
	sa.sa_sigaction = check_params;

	if (sigaction(SIGUSR1, &sa, NULL) != 0) {
		perror("failed to register SIGUSR1 handler");
		exit(EXIT_FAILURE);
	}
}
*/
import "C"

import "syscall"

	for i := 0; i < 100; i++ {
		go func() {
			defer wg.Done()
			l.SetFlags(0)
			l.Output(0, "")
		}()
	}
	wg.Wait()
}

func TestFlagAndPrefixSetting(t *testing.T) {
	var b bytes.Buffer
	l := New(&b, "Test:", LstdFlags)
	f := l.Flags()
	if f != LstdFlags {
		t.Errorf("Flags 1: expected %x got %x", LstdFlags, f)
	}
	l.SetFlags(f | Lmicroseconds)
	f = l.Flags()
	if f != LstdFlags|Lmicroseconds {

    return 1;
  if (sigaction(SIGTERM, &(struct sigaction){.sa_handler = sigdown}, NULL) < 0)
    return 2;
  if (sigaction(SIGCHLD, &(struct sigaction){.sa_handler = sigreap,
                                             .sa_flags = SA_NOCLDSTOP},
                NULL) < 0)
    return 3;

  for (;;)
    pause();
  fprintf(stderr, "Error: infinite loop terminated\n");
  return 42;

func mdestroy(mp *m) {
}

func sigtramp()

type sigactiont struct {
	sa_sigaction uintptr
	sa_mask      uint32
	sa_flags     int32
}

//go:nosplit
//go:nowritebarrierrec
func setsig(i uint32, fn uintptr) {
	var sa sigactiont
	sa.sa_flags = _SA_SIGINFO | _SA_ONSTACK | _SA_RESTART
	sa.sa_mask = uint32(sigset_all)

	p_filesz uint32 /* Segment size in file */
	p_memsz  uint32 /* Segment size in memory */
	p_flags  uint32 /* Segment flags */
	p_align  uint32 /* Segment alignment */
}

type elfShdr struct {
	sh_name      uint32 /* Section name (string tbl index) */
	sh_type      uint32 /* Section type */
	sh_flags     uint32 /* Section flags */
	sh_addr      uint32 /* Section virtual addr at execution */

	sigaction(i, &sa, nil)
}

//go:nosplit
//go:nowritebarrierrec
func setsigstack(i uint32) {
	var sa sigactiont
	sigaction(i, nil, &sa)
	if sa.sa_flags&_SA_ONSTACK != 0 {
		return
	}
	sa.sa_flags |= _SA_ONSTACK
	sigaction(i, &sa, nil)
}

//go:nosplit
//go:nowritebarrierrec
func getsig(i uint32) uintptr {
	var sa sigactiont
	sigaction(i, nil, &sa)

func (c *sigctxt) esp() uint32 { return c.regs().sc_esp }

//go:nosplit
//go:nowritebarrierrec
func (c *sigctxt) eip() uint32 { return c.regs().sc_eip }

func (c *sigctxt) eflags() uint32  { return c.regs().sc_eflags }
func (c *sigctxt) cs() uint32      { return c.regs().sc_cs }
func (c *sigctxt) fs() uint32      { return c.regs().sc_fs }
func (c *sigctxt) gs() uint32      { return c.regs().sc_gs }

	SetDefault(New(newDefaultHandler(loginternal.DefaultOutput)))
	t.Cleanup(func() {
		SetDefault(currentLogger)
		log.SetOutput(currentLogWriter)
		log.SetFlags(currentLogFlags)
	})

	// The default slog.Logger's handler uses the log package's default output.
	log.SetOutput(&logbuf)
	log.SetFlags(log.Lshortfile &^ log.LstdFlags)
	Info("msg", "a", 1)
	checkLogOutput(t, logbuf.String(), `logger_test.go:\d+: INFO msg a=1`)
	logbuf.Reset()

func mdestroy(mp *m) {
}

func sigtramp()

type sigactiont struct {
	sa_sigaction uintptr
	sa_flags     int32
	sa_mask      sigset
}

//go:nosplit
//go:nowritebarrierrec
func setsig(i uint32, fn uintptr) {
	var sa sigactiont
	sa.sa_flags = _SA_SIGINFO | _SA_ONSTACK | _SA_RESTART
	sa.sa_mask = sigset_all

		fmt.Fprintf(flag.CommandLine.Output(), "\n")
		fmt.Fprintf(flag.CommandLine.Output(), "Accepts a trace at stdin and validates it.\n")
		flag.PrintDefaults()
	}
	log.SetFlags(0)
}

var logEvents = flag.Bool("log-events", false, "whether to log events")

func main() {
	flag.Parse()

	r, err := trace.NewReader(os.Stdin)
	if err != nil {
		log.Fatal(err)
	}