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unix: enable Sysv shared memory support on darwin/arm64

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Keep it disabled on ios though.

For golang/go#45696
For golang/go#46084

Change-Id: I3d551227a4ebc0eebabdd16b175aa6a75ea9de19
Reviewed-on: https://go-review.googlesource.com/c/sys/+/353509
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Tobias Klauser
2021-10-01 11:38:46 +02:00
committed by Tobias Klauser
parent 808efd93c3
commit b1ebd4e100
5 changed files with 101 additions and 7 deletions
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5
unix/example_sysvshm_test.go
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@@ -2,8 +2,8 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build (darwin && amd64) || (linux && !android)
// +build darwin,amd64 linux,!android
//go:build (darwin && !ios) || (linux && !android)
// +build darwin,!ios linux,!android
package unix_test
@@ -14,7 +14,6 @@ import (
)
func ExampleSysvShmGet() {
// create shared memory region of 1024 bytes
id, err := unix.SysvShmGet(unix.IPC_PRIVATE, 1024, unix.IPC_CREAT|unix.IPC_EXCL|0o600)
if err != nil {

4
unix/sysvshm_unix.go
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@@ -2,8 +2,8 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build (darwin && amd64) || linux
// +build darwin,amd64 linux
//go:build (darwin && !ios) || linux
// +build darwin,!ios linux
package unix

4
unix/sysvshm_unix_other.go
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@@ -2,8 +2,8 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build (darwin && amd64)
// +build darwin,amd64
//go:build darwin && !ios
// +build darwin,!ios
package unix

59
unix/zsyscall_darwin_arm64.go
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@@ -734,6 +734,65 @@ var libc_sendfile_trampoline_addr uintptr
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func shmat(id int, addr uintptr, flag int) (ret uintptr, err error) {
r0, _, e1 := syscall_syscall(libc_shmat_trampoline_addr, uintptr(id), uintptr(addr), uintptr(flag))
ret = uintptr(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
var libc_shmat_trampoline_addr uintptr
//go:cgo_import_dynamic libc_shmat shmat "/usr/lib/libSystem.B.dylib"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func shmctl(id int, cmd int, buf *SysvShmDesc) (result int, err error) {
r0, _, e1 := syscall_syscall(libc_shmctl_trampoline_addr, uintptr(id), uintptr(cmd), uintptr(unsafe.Pointer(buf)))
result = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
var libc_shmctl_trampoline_addr uintptr
//go:cgo_import_dynamic libc_shmctl shmctl "/usr/lib/libSystem.B.dylib"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func shmdt(addr uintptr) (err error) {
_, _, e1 := syscall_syscall(libc_shmdt_trampoline_addr, uintptr(addr), 0, 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
var libc_shmdt_trampoline_addr uintptr
//go:cgo_import_dynamic libc_shmdt shmdt "/usr/lib/libSystem.B.dylib"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func shmget(key int, size int, flag int) (id int, err error) {
r0, _, e1 := syscall_syscall(libc_shmget_trampoline_addr, uintptr(key), uintptr(size), uintptr(flag))
id = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
var libc_shmget_trampoline_addr uintptr
//go:cgo_import_dynamic libc_shmget shmget "/usr/lib/libSystem.B.dylib"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Access(path string, mode uint32) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)

36
unix/ztypes_darwin_arm64.go
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@@ -639,3 +639,39 @@ type Ucred struct {
Ngroups int16
Groups [16]uint32
}
type SysvIpcPerm struct {
Uid uint32
Gid uint32
Cuid uint32
Cgid uint32
Mode uint16
_ uint16
_ int32
}
type SysvShmDesc struct {
Perm SysvIpcPerm
Segsz uint64
Lpid int32
Cpid int32
Nattch uint16
_ [34]byte
}
const (
IPC_CREAT = 0x200
IPC_EXCL = 0x400
IPC_NOWAIT = 0x800
IPC_PRIVATE = 0x0
)
const (
IPC_RMID = 0x0
IPC_SET = 0x1
IPC_STAT = 0x2
)
const (
SHM_RDONLY = 0x1000
SHM_RND = 0x2000
)