golang mmap 代码
文件路径：/src/runtime/cgo/mmap.go
/ Copyright 2015 The Go Authors. All rights reserved.
/ Use of this source code is governed by a BSD-style
/ license that can be found in the LICENSE file.
/go:build (linux && amd64) || (linux && arm64)
package cgo
/ Import "unsafe" because we use go:linkname.
import _ "unsafe"
/ When using cgo, call the C library for mmap, so that we call into
/ any sanitizer interceptors. This supports using the memory
/ sanitizer with Go programs. The memory sanitizer only applies to
/ C/C++ code; this permits that code to see the Go code as normal
/ program addresses that have been initialized.
/ To support interceptors that look for both mmap and munmap,
/ also call the C library for munmap.
/go:cgo_import_static x_cgo_mmap
/go:linkname x_cgo_mmap x_cgo_mmap
/go:linkname _cgo_mmap _cgo_mmap
var x_cgo_mmap byte
var _cgo_mmap = &x_cgo_mmap
/go:cgo_import_static x_cgo_munmap
/go:linkname x_cgo_munmap x_cgo_munmap
/go:linkname _cgo_munmap _cgo_munmap
var x_cgo_munmap byte
var _cgo_munmap = &x_cgo_munmap