blob: a4b5d581c4b251536363bb5c1c02813fb43b0d3f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package pgalloc
import (
"reflect"
"syscall"
"unsafe"
)
func unsafeSlice(addr uintptr, length int) (slice []byte) {
sh := (*reflect.SliceHeader)(unsafe.Pointer(&slice))
sh.Data = addr
sh.Len = length
sh.Cap = length
return
}
func mincore(s []byte, buf []byte) error {
if _, _, errno := syscall.RawSyscall(
syscall.SYS_MINCORE,
uintptr(unsafe.Pointer(&s[0])),
uintptr(len(s)),
uintptr(unsafe.Pointer(&buf[0]))); errno != 0 {
return errno
}
return nil
}
|
