o := new(obj)
	ifc := any(o)
	pinner.Pin(&ifc)
	if !runtime.IsPinned(unsafe.Pointer(&ifc)) {
		t.Fatal("not marked as pinned")
	}
	if runtime.IsPinned(unsafe.Pointer(o)) {
		t.Fatal("marked as pinned")
	}
	pinner.Unpin()
	pinner.Pin(ifc)
	if !runtime.IsPinned(unsafe.Pointer(o)) {
		t.Fatal("not marked as pinned")
	}
	if runtime.IsPinned(unsafe.Pointer(&ifc)) {
		t.Fatal("marked as pinned")
	}

		panic(errorString("runtime.Pinner: object was allocated into an arena"))
	}
	return e.data
}

// isPinned checks if a Go pointer is pinned.
// nosplit, because it's called from nosplit code in cgocheck.
//
//go:nosplit
func isPinned(ptr unsafe.Pointer) bool {
	span := spanOfHeap(uintptr(ptr))
	if span == nil {
		// this code is only called for Go pointer, so this must be a

	// that look like they are non-Go memory.
	if gp.m.mallocing != 0 {
		return
	}

	// If the object is pinned, it's safe to store it in C memory. The GC
	// ensures it will not be moved or freed.
	if isPinned(src) {
		return
	}

	// It's OK if writing to memory allocated by persistentalloc.
	// Do this check last because it is more expensive and rarely true.
	// If it is false the expense doesn't matter since we are crashing.

		if !cgoIsGoPointer(p) {
			return
		}
		if !top && !isPinned(p) {
			panic(errorString(msg))
		}
		cgoCheckArg(it, p, it.Kind_&abi.KindDirectIface == 0, false, msg)
	case abi.Slice:
		st := (*slicetype)(unsafe.Pointer(t))
		s := (*slice)(p)
		p = s.array
		if p == nil || !cgoIsGoPointer(p) {
			return
		}
		if !top && !isPinned(p) {
			panic(errorString(msg))
		}
		if !st.Elem.Pointers() {

func FPCallers(pcBuf []uintptr) int {
	return fpTracebackPCs(unsafe.Pointer(getfp()), pcBuf)
}

const FramePointerEnabled = framepointer_enabled

var (
	IsPinned      = isPinned
	GetPinCounter = pinnerGetPinCounter
)

func SetPinnerLeakPanic(f func()) {
	pinnerLeakPanic = f
}
func GetPinnerLeakPanic() func() {
	return pinnerLeakPanic
}