func (r *CoverageMetaFileReader) GetPackagePayload(pkIdx uint32, payloadbuf []byte) ([]byte, error) {

	// Determine correct offset/length.
	if uint64(pkIdx) >= r.hdr.Entries {
		return nil, fmt.Errorf("GetPackagePayload: illegal pkg index %d", pkIdx)
	}
	off := r.pkgOffsets[pkIdx]
	len := r.pkgLengths[pkIdx]

	if r.debug {
		fmt.Fprintf(os.Stderr, "=-= for pk %d, off=%d len=%d\n", pkIdx, off, len)
	}

	if r.fileView != nil {

)

// The compiler emits calls to runtime.addCovMeta
// but this code has moved to rtcov.AddMeta.
func addCovMeta(p unsafe.Pointer, dlen uint32, hash [16]byte, pkgpath string, pkgid int, cmode uint8, cgran uint8) uint32 {
	id := rtcov.AddMeta(p, dlen, hash, pkgpath, pkgid, cmode, cgran)
	if id == 0 {
		throw("runtime.addCovMeta: coverage package map collision")
	}
	return id

			}
			if !isLive {
				// Skip this function.
				i += coverage.FirstCtrOffset + int(nCtrs) - 1
				continue
			}

			if s.debug {
				if pkgId != dpkg {
					dpkg = pkgId
					fmt.Fprintf(os.Stderr, "\n=+= %d: pk=%d visit live fcn",
						i, pkgId)
				}
				fmt.Fprintf(os.Stderr, " {i=%d F%d NC%d}", i, funcId, nCtrs)
			}

			// Vet and/or fix up package ID. A package ID of zero

	// value into main.XYZ's counter slab. However since we've just
	// finished clearing the entire counter segment, we will have lost
	// the values in the prolog portion of main.XYZ's counter slab
	// (nctrs, pkgid, funcid). This means that later on at the end of
	// program execution as we walk through the entire counter array
	// for the program looking for executed functions, we'll zoom past

// as a struct of the following form:
//
// struct {
//     numCtrs uint32
//     pkgid uint32
//     funcid uint32
//     counterArray [numBlocks]uint32
// }
//
// where "numCtrs" is the number of blocks / coverable units within the
// function, "pkgid" is the unique index assigned to this package by
// the runtime, "funcid" is the index of this function within its containing

func libfuzzerTraceConstCmp8(uint64, uint64, uint)
func libfuzzerHookStrCmp(string, string, uint)
func libfuzzerHookEqualFold(string, string, uint)

func addCovMeta(p unsafe.Pointer, len uint32, hash [16]byte, pkpath string, pkgId int, cmode uint8, cgran uint8) uint32

// architecture variants
var x86HasPOPCNT bool
var x86HasSSE41 bool
var x86HasFMA bool
var armHasVFPv4 bool
var arm64HasATOMICS bool

				atomicPackagePrefix(), cv, which, val)
		}
	}

	// Generate the registration hook sequence for the function. This
	// sequence looks like
	//
	//   counterVar[0] = <num_units>
	//   counterVar[1] = pkgId
	//   counterVar[2] = fnId
	//
	cv := f.fn.counterVar
	regHook := hookWrite(cv, 0, strconv.Itoa(len(f.fn.units))) + " ; " +
		hookWrite(cv, 1, mkPackageIdExpression()) + " ; " +