// preceded and followed by a faulting page.
func dangerousSlice(t *testing.T) []byte {
	pagesize := syscall.Getpagesize()
	b, err := syscall.Mmap(0, 0, 3*pagesize, syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_ANONYMOUS|syscall.MAP_PRIVATE)
	if err != nil {
		t.Fatalf("mmap failed %s", err)
	}
	err = syscall.Mprotect(b[:pagesize], syscall.PROT_NONE)
	if err != nil {
		t.Fatalf("mprotect low failed %s\n", err)
	}

   *       channel have their own file descriptors. Generally this only happens when both channels
   *       are files or sockets. This performs zero copies - the bytes never enter userspace.
   *   <li>Use mmap(2) or equivalent. Requires that either the input channel or the output channel
   *       have file descriptors. Bytes are copied from the file into a kernel buffer, then directly

pkg syscall (windows-amd64), type WSAProtocolInfo struct, Version int32
pkg testing, func RegisterCover(Cover)
pkg testing, type Cover struct
pkg testing, type Cover struct, Blocks map[string][]CoverBlock
pkg testing, type Cover struct, Counters map[string][]uint32
pkg testing, type Cover struct, CoveredPackages string
pkg testing, type Cover struct, Mode string
pkg testing, type CoverBlock struct

pkg expvar, method (*Int) String() string
pkg expvar, method (*Map) Add(string, int64)
pkg expvar, method (*Map) AddFloat(string, float64)
pkg expvar, method (*Map) Do(func(KeyValue))
pkg expvar, method (*Map) Get(string) Var
pkg expvar, method (*Map) Init() *Map
pkg expvar, method (*Map) Set(string, Var)
pkg expvar, method (*Map) String() string
pkg expvar, method (*String) Set(string)

pkg syscall (netbsd-arm64-cgo), func Mkfifo(string, uint32) error
pkg syscall (netbsd-arm64-cgo), func Mknod(string, uint32, int) error
pkg syscall (netbsd-arm64-cgo), func Mmap(int, int64, int, int, int) ([]uint8, error)
pkg syscall (netbsd-arm64-cgo), func Munmap([]uint8) error
pkg syscall (netbsd-arm64-cgo), func Nanosleep(*Timespec, *Timespec) error

pkg go/build, type Package struct, EmbedPatternPos map[string][]token.Position
pkg go/build, type Package struct, IgnoredOtherFiles []string
pkg go/build, type Package struct, TestEmbedPatterns []string
pkg go/build, type Package struct, TestEmbedPatternPos map[string][]token.Position
pkg go/build, type Package struct, XTestEmbedPatterns []string
pkg go/build, type Package struct, XTestEmbedPatternPos map[string][]token.Position

pkg syscall (freebsd-arm64), func Lstat(string, *Stat_t) error
pkg syscall (freebsd-arm64), func Mkfifo(string, uint32) error
pkg syscall (freebsd-arm64), func Mknod(string, uint32, uint64) error
pkg syscall (freebsd-arm64), func Mmap(int, int64, int, int, int) ([]uint8, error)
pkg syscall (freebsd-arm64), func Munmap([]uint8) error
pkg syscall (freebsd-arm64), func Nanosleep(*Timespec, *Timespec) error

pkg strings, func CutPrefix(string, string) (string, bool) #42537
pkg strings, func CutSuffix(string, string) (string, bool) #42537
pkg sync, method (*Map) CompareAndDelete(interface{}, interface{}) bool #51972
pkg sync, method (*Map) CompareAndSwap(interface{}, interface{}, interface{}) bool #51972
pkg sync, method (*Map) Swap(interface{}, interface{}) (interface{}, bool) #51972
pkg syscall (freebsd-386-cgo), const SYS_FSTAT = 551 #53280

	scannerCollectorPath       collectorPath = "/scanner"
)

const (
	clusterBasePath = "/cluster"
)

type metricsV3Collection struct {
	mgMap       map[collectorPath]*MetricsGroup
	bucketMGMap map[collectorPath]*MetricsGroup

	// Gatherers for non-bucket MetricsGroup's
	mgGatherers map[collectorPath]prometheus.Gatherer

	collectorPaths []collectorPath
}

func newMetricGroups(r *prometheus.Registry) *metricsV3Collection {

	current     *apiPackage
	deprecated  map[token.Pos]bool
	features    map[string]bool              // set
	imported    map[string]*apiPackage       // packages already imported
	stdPackages []string                     // names, omitting "unsafe", internal, and vendored packages
	importMap   map[string]map[string]string // importer dir -> import path -> canonical path
	importDir   map[string]string            // canonical import path -> dir