// for which we have computed the size and offset, in a
	// mmap'd region. The second part writes more content, for
	// which we don't know the size.
	if ctxt.Arch.Family != sys.Wasm {
		// Don't mmap if we're building for Wasm. Wasm file
		// layout is very different so filesize is meaningless.
		if err := ctxt.Out.Mmap(filesize); err != nil {
			Exitf("mapping output file failed: %v", err)
		}
	}

//go:build unix

package syscall

import _ "unsafe" // for linkname

// mmap should be an internal detail,
// but widely used packages access it using linkname.
// Notable members of the hall of shame include:
//   - modernc.org/memory
//   - github.com/ncruces/go-sqlite3
//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package counter

import (
	"bytes"
	"fmt"
	"strings"
	"unsafe"

	"golang.org/x/telemetry/internal/mmap"
)

type File struct {
	Meta  map[string]string
	Count map[string]uint64
}

func Parse(filename string, data []byte) (*File, error) {
	if !bytes.HasPrefix(data, []byte(hdrPrefix)) || len(data) < pageSize {

		}
		panicmakeslicecap()
	}

	return mallocgc(mem, et, true)
}

func makeslice64(et *_type, len64, cap64 int64) unsafe.Pointer {
	len := int(len64)
	if int64(len) != len64 {
		panicmakeslicelen()
	}

	cap := int(cap64)
	if int64(cap) != cap64 {
		panicmakeslicecap()
	}

	return makeslice(et, len, cap)
}

// growslice allocates new backing store for a slice.
//

	if start/pageSize != (start+n)/pageSize {
		// bump start to next page
		start = round(limit, pageSize)
	}
	return start, start + n
}

var memmap = mmap.Mmap
var munmap = mmap.Munmap

func (m *mappedFile) close() {
	m.closeOnce.Do(func() {
		if m.mapping != nil {
			munmap(m.mapping)
			m.mapping = nil
		}
		if m.f != nil {
			m.f.Close() // best effort

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

//sys	mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
//sys	munmap(addr uintptr, length uintptr) (err error)

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

		o.Write(w.Writer)
	})
	// TODO: output in sorted order?
	// Currently tools (cmd/internal/goobj package) doesn't use mmap,
	// and it just read it into a map in memory upfront. If it uses
	// mmap, if the output is sorted, it probably could avoid reading
	// into memory and just do lookups in the mmap'd object file.
}

// return the number of aux symbols s have.
func nAuxSym(s *LSym) int {
	n := 0
	if s.Gotype != nil {

	// s390x         TASK_SIZE         1<<64 (64 bit addresses)
	//
	// These limits may increase over time, but are currently at
	// most 48 bits except on s390x. On all architectures, Linux
	// starts placing mmap'd regions at addresses that are
	// significantly below 48 bits, so even if it's possible to
	// exceed Go's 48 bit limit, it's extremely unlikely in
	// practice.
	//

    Map<Object, Integer> map3 = ImmutableMap.<Object, Integer>of(1, 2);
    Map<Number, Object> map4 = ImmutableMap.<Number, Object>of(1, 2);
    Map<Number, Number> map5 = ImmutableMap.<Number, Number>of(1, 2);
    Map<Number, Integer> map6 = ImmutableMap.<Number, Integer>of(1, 2);
    Map<Integer, Object> map7 = ImmutableMap.<Integer, Object>of(1, 2);

	}
	return
}
func osinit_hack_trampoline()

// mmap is used to do low-level memory allocation via mmap. Don't allow stack
// splits, since this function (used by sysAlloc) is called in a lot of low-level
// parts of the runtime and callers often assume it won't acquire any locks.
//
//go:nosplit
func mmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) (unsafe.Pointer, int) {