mirror of
https://github.com/golang/go
synced 2024-10-02 04:18:33 -06:00
193088b246
Currently mmap returns an unsafe.Pointer that encodes OS errors as values less than 4096. In practice this is okay, but it borders on being really unsafe: for example, the value has to be checked immediately after return and if stack copying were ever to observe such a value, it would panic. It's also not remotely idiomatic. Fix this by making mmap return a separate pointer value and error, like a normal Go function. Updates #22218. Change-Id: Iefd965095ffc82cc91118872753a5d39d785c3a6 Reviewed-on: https://go-review.googlesource.com/71270 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
24 lines
792 B
Go
24 lines
792 B
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.
|
|
|
|
// +build !plan9
|
|
// +build !solaris
|
|
// +build !windows
|
|
// +build !nacl
|
|
// +build !linux !amd64
|
|
|
|
package runtime
|
|
|
|
import "unsafe"
|
|
|
|
// mmap calls the mmap system call. It is implemented in assembly.
|
|
// We only pass the lower 32 bits of file offset to the
|
|
// assembly routine; the higher bits (if required), should be provided
|
|
// by the assembly routine as 0.
|
|
// The err result is an OS error code such as ENOMEM.
|
|
func mmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) (p unsafe.Pointer, err int)
|
|
|
|
// munmap calls the munmap system call. It is implemented in assembly.
|
|
func munmap(addr unsafe.Pointer, n uintptr)
|