// 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.
//

// Called on the new thread, cannot allocate memory.
func minit() {
	asmcgocall(unsafe.Pointer(abi.FuncPCABI0(miniterrno)), unsafe.Pointer(&libc____errno))

	minitSignals()

	getg().m.procid = uint64(pthread_self())
}

// Called from dropm to undo the effect of an minit.
func unminit() {
	unminitSignals()
	getg().m.procid = 0
}

// Called on the new thread, cannot allocate memory.
func minit() {
	// iOS does not support alternate signal stack.
	// The signal handler handles it directly.
	if !(GOOS == "ios" && GOARCH == "arm64") {
		minitSignalStack()
	}
	minitSignalMask()
	getg().m.procid = uint64(pthread_self())
}

// Called from dropm to undo the effect of an minit.
//
//go:nosplit
func unminit() {

		sigaltstack(&st, nil)
	}

	minitSignals()
}

// Called from dropm to undo the effect of an minit.
//
//go:nosplit
func unminit() {
	unminitSignals()
	getg().m.procid = 0
}

// Called from exitm, but not from drop, to undo the effect of thread-owned
// resources in minit, semacreate, or elsewhere. Do not take locks after calling this.
func mdestroy(mp *m) {
}

func sigtramp()

// Called on the new thread, cannot allocate memory.
func minit() {
	if atomic.Load(&exiting) != 0 {
		exits(&emptystatus[0])
	}
	// Mask all SSE floating-point exceptions
	// when running on the 64-bit kernel.
	setfpmasks()
}

// Called from dropm to undo the effect of an minit.
func unminit() {
}

// Called on the new thread, cannot allocate memory.
func minit() {
	minitSignals()

	// Cgo-created threads and the bootstrap m are missing a
	// procid. We need this for asynchronous preemption and it's
	// useful in debuggers.
	getg().m.procid = uint64(gettid())
}

// Called from dropm to undo the effect of an minit.
//
//go:nosplit
func unminit() {
	unminitSignals()

// Called on the new thread, cannot allocate Go memory.
func minit() {
	var thandle uintptr
	if stdcall7(_DuplicateHandle, currentProcess, currentThread, currentProcess, uintptr(unsafe.Pointer(&thandle)), 0, 0, _DUPLICATE_SAME_ACCESS) == 0 {
		print("runtime.minit: duplicatehandle failed; errno=", getlasterror(), "\n")
		throw("runtime.minit: duplicatehandle failed")
	}

	mp := getg().m
	lock(&mp.threadLock)

		if !blockableSig(uint32(i)) {
			sigdelset(&nmask, i)
		}
	}
	sigprocmask(_SIG_SETMASK, &nmask, nil)
}

// unminitSignals is called from dropm, via unminit, to undo the
// effect of calling minit on a non-Go thread.
//
//go:nosplit
func unminitSignals() {
	if getg().m.newSigstack {
		st := stackt{ss_flags: _SS_DISABLE}
		sigaltstack(&st, nil)
	} else {

	// thread.
	//
	// For other threads, the runtime explicitly asks the kernel
	// to use the default stack size so that all stacks are
	// consistent.
	//
	// At thread start, in minit, the runtime queries the OS for
	// the actual stack bounds so that the stack size doesn't need
	// to be hard-coded into the runtime.
	oh64.SizeOfStackReserve = 0x00200000
	if !iscgo {

	locks         int32
	dying         int32
	profilehz     int32
	spinning      bool // m is out of work and is actively looking for work
	blocked       bool // m is blocked on a note
	newSigstack   bool // minit on C thread called sigaltstack
	printlock     int8
	incgo         bool          // m is executing a cgo call
	isextra       bool          // m is an extra m