//go:cgo_import_dynamic libc_kill kill "libc.so"
//go:cgo_import_dynamic libc_madvise madvise "libc.so"
//go:cgo_import_dynamic libc_malloc malloc "libc.so"
//go:cgo_import_dynamic libc_mmap mmap "libc.so"
//go:cgo_import_dynamic libc_munmap munmap "libc.so"
//go:cgo_import_dynamic libc_open open "libc.so"
//go:cgo_import_dynamic libc_pthread_attr_destroy pthread_attr_destroy "libc.so"

func osStackAlloc(s *mspan) {
	osStackRemap(s, _MAP_STACK)
}

func osStackFree(s *mspan) {
	// Undo MAP_STACK.
	osStackRemap(s, 0)
}

func osStackRemap(s *mspan, flags int32) {
	a, err := mmap(unsafe.Pointer(s.base()), s.npages*pageSize, _PROT_READ|_PROT_WRITE, _MAP_PRIVATE|_MAP_ANON|_MAP_FIXED|flags, -1, 0)
	if err != 0 || uintptr(a) != s.base() {

		return false
	}

	panic(fmt.Sprintf("%v: %s", pos, msg))
}

func (check *Checker) verify(pos syntax.Pos, tparams []*TypeParam, targs []Type, ctxt *Context) (int, error) {
	smap := makeSubstMap(tparams, targs)
	for i, tpar := range tparams {
		// Ensure that we have a (possibly implicit) interface as type bound (go.dev/issue/51048).
		tpar.iface()

		}
		score += adjValue(typ)
		mask |= typ
	}
	return score, mask
}

var resultFlagToPositiveAdj map[ResultPropBits]scoreAdjustTyp
var paramFlagToPositiveAdj map[ParamPropBits]scoreAdjustTyp

func setupFlagToAdjMaps() {
	resultFlagToPositiveAdj = map[ResultPropBits]scoreAdjustTyp{
		ResultIsAllocatedMem:     returnFeedsConcreteToInterfaceCallAdj,

	type T [4000]byte
	m := map[int]T{}
	x := m[0]
	if x != (T{}) {
		t.Errorf("map value not zero")
	}
	y, ok := m[0]
	if ok {
		t.Errorf("map value should be missing")
	}
	if y != (T{}) {
		t.Errorf("map value not zero")
	}
}

type empty struct {
}

func TestEmptyKeyAndValue(t *testing.T) {
	a := make(map[int]empty, 4)
	b := make(map[empty]int, 4)

// mmap varies by architecture; see syscall_linux_*.go.
//sys	munmap(addr uintptr, length uintptr) (err error)

var mapper = &mmapper{
	active: make(map[*byte][]byte),
	mmap:   mmap,
	munmap: munmap,
}

func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) {
	return mapper.Mmap(fd, offset, length, prot, flags)
}

func GetMmap(c Cache, id ActionID) ([]byte, Entry, error) {
	entry, err := c.Get(id)
	if err != nil {
		return nil, entry, err
	}
	md, err := mmap.Mmap(c.OutputFile(entry.OutputID))
	if err != nil {
		return nil, Entry{}, err
	}
	if int64(len(md.Data)) != entry.Size {
		return nil, Entry{}, &entryNotFoundError{Err: errors.New("file incomplete")}
	}

	// Notes:
	// - this version writes everything little-endian, which means
	//   a call is needed to encode every value (expensive)
	// - we may want to move to a model in which we just blast out
	//   all counters, or possibly mmap the file and do the write
	//   implicitly.
	ctrb := make([]byte, 4)
	wrval := func(val uint32) error {
		var buf []byte
		var towr int
		if cfw.cflavor == coverage.CtrRaw {

func getIstioVersions(ctx cli.Context, istioNamespace string, revisions []string) (map[string]string, map[string][]string) {
	istioVersions := make(map[string]string)
	proxyVersionsMap := make(map[string]sets.String)
	proxyVersions := make(map[string][]string)
	for _, revision := range revisions {
		client, err := ctx.CLIClientWithRevision(revision)
		if err != nil {

	}
	return i
}

// Mmap manager, for use by operating system-specific implementations.

type mmapper struct {
	sync.Mutex
	active map[*byte][]byte // active mappings; key is last byte in mapping
	mmap   func(addr, length uintptr, prot, flags, fd int, offset int64) (uintptr, error)
	munmap func(addr uintptr, length uintptr) error
}