func userArenaHeapBitsSetSliceType(typ *_type, n int, ptr unsafe.Pointer, s *mspan) {
	mem, overflow := math.MulUintptr(typ.Size_, uintptr(n))
	if overflow || n < 0 || mem > maxAlloc {
		panic(plainError("runtime: allocation size out of range"))
	}
	for i := 0; i < n; i++ {
		userArenaHeapBitsSetType(typ, add(ptr, uintptr(i)*typ.Size_), s)
	}
}

func newarray(typ *_type, n int) unsafe.Pointer {
	if n == 1 {
		return mallocgc(typ.Size_, typ, true)
	}
	mem, overflow := math.MulUintptr(typ.Size_, uintptr(n))
	if overflow || mem > maxAlloc || n < 0 {
		panic(plainError("runtime: allocation size out of range"))
	}
	return mallocgc(mem, typ, true)
}

// reflect_unsafe_NewArray is meant for package reflect,
// but widely used packages access it using linkname.

//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//
//go:linkname mapassign
func mapassign(t *maptype, h *hmap, key unsafe.Pointer) unsafe.Pointer {
	if h == nil {
		panic(plainError("assignment to entry in nil map"))
	}
	if raceenabled {
		callerpc := getcallerpc()
		pc := abi.FuncPCABIInternal(mapassign)
		racewritepc(unsafe.Pointer(h), callerpc, pc)

func badmcall(fn func(*g)) {
	throw("runtime: mcall called on m->g0 stack")
}

func badmcall2(fn func(*g)) {
	throw("runtime: mcall function returned")
}

func badreflectcall() {
	panic(plainError("arg size to reflect.call more than 1GB"))
}

//go:nosplit
//go:nowritebarrierrec
func badmorestackg0() {
	if !crashStackImplemented {
		writeErrStr("fatal: morestack on g0\n")
		return
	}