x := globallib.Data[1<<16-1]
	if x != 1<<16-1 {
		panic("testMediumOffset: direct mismatch")
	}

	y := &globallib.Data[1<<16-3]
	if y != &ptrData()[1<<16-3] {
		panic("testMediumOffset: address mismatch")
	}
}

//go:noinline
func testLargeOffset() {
	for i, s := range globallib.Data[1<<20:] {
		if s != int64(i)+1<<20 {
			panic("testLargeOffset: index mismatch")
		}
	}

	x := globallib.Data[1<<20+1]

			offset := rand.Intn(chunkWords)

			err := lockedfile.Transform(path, func(data []byte) (chunk []byte, err error) {
				chunk = buf[offset*8 : (offset+chunkWords)*8]

				if len(data)&^7 != len(data) {
					t.Errorf("read %d bytes, but each write is an integer multiple of 8 bytes", len(data))
					return chunk, nil
				}

				words := len(data) / 8
				if !isPowerOf2(words) {

func genericSorted[T sort.Interface](data T) bool {
	n := data.Len()
	for i := n - 1; i > 0; i-- {
		if data.Less(i, i-1) {
			return false
		}
	}
	return true
}
func TestGenericSorted(t *testing.T) {
	var data = sort.IntSlice{-10, -5, 0, 1, 2, 3, 5, 7, 11, 100, 100, 100, 1000, 10000}
	f := func() {
		genericSorted(data)
	}
	if n := testing.AllocsPerRun(10, f); n > 0 {

	s := unsafeheader.Slice{
		Data: unsafe.Pointer(&b[0]),
		Len:  n,
		Cap:  cap(b) * int(scale),
	}
	return *(*[]*Block)(unsafe.Pointer(&s))
}
func (c *Cache) freeBlockSlice(s []*Block) {
	var base *Value
	var derived *Block
	scale := unsafe.Sizeof(base) / unsafe.Sizeof(derived)
	b := unsafeheader.Slice{
		Data: unsafe.Pointer(&s[0]),

package mmap

import (
	"io"
	"os"
)

// mmapFile on other systems doesn't mmap the file. It just reads everything.
func mmapFile(f *os.File) (Data, error) {
	b, err := io.ReadAll(f)
	if err != nil {
		return Data{}, err
	}
	return Data{f, b}, nil

		if d.IsDir() {
			return nil
		}
		data, err := os.ReadFile(path)
		if err != nil {
			log.Fatal(err)
		}
		if strings.HasSuffix(path, ".zip") {
			log.Fatalf("unexpected file during walk: %s", path)
		}
		name := filepath.ToSlash(path)
		w, err := zw.CreateRaw(&zip.FileHeader{
			Name:               name,
			Method:             zip.Store,
			CompressedSize64:   uint64(len(data)),
			UncompressedSize64: uint64(len(data)),

// Indexed package export.
//
// The indexed export data format is an evolution of the previous
// binary export data format. Its chief contribution is introducing an
// index table, which allows efficient random access of individual
// declarations and inline function bodies. In turn, this allows
// avoiding unnecessary work for compilation units that import large
// packages.
//
//
// The top-level data format is structured as:
//

	dbgtrace(2, "visit counter data file %s dirIdx %d", cdf, dirIdx)
	m.mm.beginCounterDataFile(cdr)
}

func (m *mstate) EndCounterDataFile(cdf string, cdr *decodecounter.CounterDataReader, dirIdx int) {
}

func (m *mstate) VisitFuncCounterData(data decodecounter.FuncPayload) {
	m.mm.visitFuncCounterData(data)
}

func (m *mstate) EndCounters() {
}

Commands are:

textfmt     convert coverage data to textual format
percent     output total percentage of statements covered
pkglist     output list of package import paths
func        output coverage profile information for each function
merge       merge data files together
subtract    subtract one set of data files from another set
intersect   generate intersection of two sets of data files

		"issue60734",
		`
package main

import (
	"unsafe"
)

// The Data struct size is expected to be rounded up to 16 bytes.
type Data struct {
	Value  uint32   // 4 bytes
	Label  [10]byte // 10 bytes
	Active bool     // 1 byte
	// padded with 1 byte to make it align
}

func main() {
	assert(unsafe.Sizeof(Data{}) == 16)
}
`,
	},
}

func TestGCSizes(t *testing.T) {