} else {
			oldgoact->handler = (uintptr_t)(oldact.sa_handler);
		}
		for (i = 0 ; i < _SIG_WORDS; i++) {
			oldgoact->mask.__bits[i] = 0;
		}
		for (i = 0; i < 8 * sizeof(oldgoact->mask); i++) {
			if (sigismember(&oldact.sa_mask, i+1) == 1) {
				oldgoact->mask.__bits[i/32] |= (uint32_t)(1)<<(i&31);
			}
		}
		oldgoact->flags = oldact.sa_flags;
	}

	_cgo_tsan_release();
	return ret;

}

type lwpparams struct {
	start_func uintptr
	arg        unsafe.Pointer
	stack      uintptr
	tid1       unsafe.Pointer // *int32
	tid2       unsafe.Pointer // *int32
}

type sigset struct {
	__bits [4]uint32
}

type stackt struct {
	ss_sp     uintptr
	ss_size   uintptr
	ss_flags  int32
	pad_cgo_0 [4]byte
}

type siginfo struct {
	si_signo  int32
	si_errno  int32

//go:nosplit
func setSignalstackSP(s *stackt, sp uintptr) {
	s.ss_sp = sp
}

//go:nosplit
//go:nowritebarrierrec
func sigaddset(mask *sigset, i int) {
	mask.__bits[(i-1)/32] |= 1 << ((uint32(i) - 1) & 31)
}

func sigdelset(mask *sigset, i int) {
	mask.__bits[(i-1)/32] &^= 1 << ((uint32(i) - 1) & 31)
}

//go:nosplit
func (c *sigctxt) fixsigcode(sig uint32) {
}

func setProcessCPUProfiler(hz int32) {

	_EV_RECEIPT   = 0
	_EV_ERROR     = 0x4000
	_EV_EOF       = 0x8000
	_EVFILT_READ  = 0x0
	_EVFILT_WRITE = 0x1
	_EVFILT_USER  = 0x8

	_NOTE_TRIGGER = 0x1000000
)

type sigset struct {
	__bits [4]uint32
}

type siginfo struct {
	_signo   int32
	_code    int32
	_errno   int32
	_reason  uintptr
	_reasonx [16]byte
}

type stackt struct {
	ss_sp    uintptr
	ss_size  uintptr

	_EV_RECEIPT   = 0
	_EV_ERROR     = 0x4000
	_EV_EOF       = 0x8000
	_EVFILT_READ  = 0x0
	_EVFILT_WRITE = 0x1
	_EVFILT_USER  = 0x8

	_NOTE_TRIGGER = 0x1000000
)

type sigset struct {
	__bits [4]uint32
}

type siginfo struct {
	_signo  int32
	_code   int32
	_errno  int32
	_reason [20]byte
}

type stackt struct {
	ss_sp    uintptr
	ss_size  uintptr
	ss_flags int32
}

	_EV_RECEIPT   = 0
	_EV_ERROR     = 0x4000
	_EV_EOF       = 0x8000
	_EVFILT_READ  = 0x0
	_EVFILT_WRITE = 0x1
	_EVFILT_USER  = 0x8

	_NOTE_TRIGGER = 0x1000000
)

type sigset struct {
	__bits [4]uint32
}

type siginfo struct {
	_signo  int32
	_code   int32
	_errno  int32
	_pad    int32
	_reason [24]byte
}

type stackt struct {
	ss_sp     uintptr
	ss_size   uintptr

	_EV_RECEIPT   = 0
	_EV_ERROR     = 0x4000
	_EV_EOF       = 0x8000
	_EVFILT_READ  = 0x0
	_EVFILT_WRITE = 0x1
	_EVFILT_USER  = 0x8

	_NOTE_TRIGGER = 0x1000000
)

type sigset struct {
	__bits [4]uint32
}

type siginfo struct {
	_signo   int32
	_code    int32
	_errno   int32
	_reason  uintptr
	_reasonx [16]byte
}

type stackt struct {
	ss_sp    uintptr
	ss_size  uintptr

	tls_size   uintptr
	child_tid  unsafe.Pointer // *int32
	parent_tid *int32
	flags      int32
	rtp        *rtprio
	spare      [3]uintptr
}

type thread int32 // long

type sigset struct {
	__bits [4]uint32
}

type stackt struct {
	ss_sp    uintptr
	ss_size  uintptr
	ss_flags int32
}

type siginfo struct {
	si_signo  int32
	si_errno  int32
	si_code   int32
	si_pid    int32

	child_tid  unsafe.Pointer // *int64
	parent_tid *int64
	flags      int32
	pad_cgo_0  [4]byte
	rtp        *rtprio
	spare      [3]uintptr
}

type thread int64 // long

type sigset struct {
	__bits [4]uint32
}

type stackt struct {
	ss_sp     uintptr
	ss_size   uintptr
	ss_flags  int32
	pad_cgo_0 [4]byte
}

type siginfo struct {
	si_signo  int32
	si_errno  int32

	tls_size   uintptr
	child_tid  unsafe.Pointer // *int32
	parent_tid *int32
	flags      int32
	rtp        *rtprio
	spare      [3]uintptr
}

type thread int32 // long

type sigset struct {
	__bits [4]uint32
}

type stackt struct {
	ss_sp    uintptr
	ss_size  uintptr
	ss_flags int32
}

type siginfo struct {
	si_signo  int32
	si_errno  int32
	si_code   int32
	si_pid    int32