if r == nil {
			t.Fatalf("write did not fault")
		}
		type addressable interface {
			Addr() uintptr
		}
		a, ok := r.(addressable)
		if !ok {
			t.Fatalf("fault does not contain address")
		}
		want := uintptr(unsafe.Pointer(&m[lowBits]))
		got := a.Addr()
		if got != want {
			t.Fatalf("fault address %x, want %x", got, want)
		}
	}()
	m[lowBits] = 1 // will fault

// license that can be found in the LICENSE file.

// Test that if a slice access causes a fault, a deferred func
// sees the most recent value of the variables it accesses.
// This is true today; the role of the test is to ensure it stays true.
//
// In the test, memcopy is the function that will fault, during dst[i] = src[i].
// The deferred func recovers from the error and returns, making memcopy

		r := recover()
		if r == nil {
			panic("no fault or bounds check failure happened")
		}
		s := fmt.Sprintf("%s", r)
		if s != "runtime error: index out of range [1] with length 1" {
			panic("bad panic: " + s)
		}
	}()
	return uint16(x[i]) | uint16(x[i+1])<<8
}

func test32(x []byte) uint32 {
	defer func() {
		r := recover()
		if r == nil {
			panic("no fault or bounds check failure happened")
		}

	vs := r.Message.(*v1alpha3.VirtualService)

	for _, httpRoute := range vs.Http {
		if httpRoute.Fault != nil {
			if httpRoute.Fault.Delay != nil {
				// nolint: staticcheck
				if httpRoute.Fault.Delay.Percent > 0 {
					ctx.Report(gvk.VirtualService,
						msg.NewDeprecated(r, replacedMessage("HTTPRoute.fault.delay.percent", "HTTPRoute.fault.delay.percentage")))
				}
			}
		}
	}
}

	// We can only set user arenas to fault if we're in the _GCoff phase.
	if gcphase == _GCoff {
		lock(&userArenaState.lock)
		faultList := userArenaState.fault
		userArenaState.fault = nil
		unlock(&userArenaState.lock)

		s.setUserArenaChunkToFault()
		for _, lc := range faultList {
			lc.mspan.setUserArenaChunkToFault()
		}

		// Until the chunks are set to fault, keep them alive via the fault list.

	}
	_ = *addr // if nil, fault before taking the lock
	var r uint64
	addrLock(addr).lock()
	r = *addr + uint64(delta)
	*addr = r
	addrLock(addr).unlock()
	return r
}

//go:nosplit
func goXchg64(addr *uint64, v uint64) uint64 {
	if uintptr(unsafe.Pointer(addr))&7 != 0 {
		*(*int)(nil) = 0 // crash on unaligned uint64
	}
	_ = *addr // if nil, fault before taking the lock
	var r uint64

				unnecessary.clear()
			}

			// Find any pointers that this op is guaranteed to fault on if nil.
			var ptrstore [2]*Value
			ptrs := ptrstore[:0]
			if opcodeTable[v.Op].faultOnNilArg0 && (faultOnLoad || v.Type.IsMemory()) {
				// On AIX, only writing will fault.
				ptrs = append(ptrs, v.Args[0])
			}

	xdsfault "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/common/fault/v3"
	cors "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/http/cors/v3"
	xdshttpfault "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/http/fault/v3"
	matcher "github.com/envoyproxy/go-control-plane/envoy/type/matcher/v3"
	xdstype "github.com/envoyproxy/go-control-plane/envoy/type/v3"

const (
	// Buffer HTTP filter
	Buffer = "envoy.filters.http.buffer"
	// CORS HTTP filter
	CORS = "envoy.filters.http.cors"
	// Dynamo HTTP filter
	Dynamo = "envoy.filters.http.dynamo"
	// Fault HTTP filter
	Fault = "envoy.filters.http.fault"
	// GRPCHTTP1Bridge HTTP filter
	GRPCHTTP1Bridge = "envoy.filters.http.grpc_http1_bridge"
	// GRPCJSONTranscoder HTTP filter
	GRPCJSONTranscoder = "envoy.filters.http.grpc_json_transcoder"

			// We could check that the arena chunk is explicitly set to fault,
			// but the fact that we faulted on accessing it is enough to prove
			// that it is.
			print("accessed data from freed user arena ", hex(gp.sigcode1), "\n")
		} else {
			print("unexpected fault address ", hex(gp.sigcode1), "\n")
		}
		throw("fault")
	case _EXCEPTION_INT_DIVIDE_BY_ZERO:
		panicdivide()
	case _EXCEPTION_INT_OVERFLOW: