forked from johnjohnsp1/capsule8
-
Notifications
You must be signed in to change notification settings - Fork 0
/
syscall_linux.go
79 lines (60 loc) · 1.69 KB
/
syscall_linux.go
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
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
// Copyright 2017 Capsule8, Inc.
//
// 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 perf
import (
"bytes"
"unsafe"
"golang.org/x/sys/unix"
)
func enable(fd int) error {
_, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), PERF_EVENT_IOC_ENABLE, 1)
err := error(nil)
if errno != 0 {
err = errno
}
return err
}
func setFilter(fd int, filter string) error {
f, err := unix.BytePtrFromString(filter)
if err != nil {
return err
}
_, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd),
PERF_EVENT_IOC_SET_FILTER, uintptr(unsafe.Pointer(f)))
err = error(nil)
if errno != 0 {
err = errno
}
return err
}
func disable(fd int) error {
_, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), PERF_EVENT_IOC_DISABLE, 1)
err := error(nil)
if errno != 0 {
err = errno
}
return err
}
func open(attr *EventAttr, pid int, cpu int, groupFd int, flags uintptr) (int, error) {
buf := new(bytes.Buffer)
attr.write(buf)
b := buf.Bytes()
r1, _, errno := unix.Syscall6(unix.SYS_PERF_EVENT_OPEN, uintptr(unsafe.Pointer(&b[0])),
uintptr(pid), uintptr(cpu), uintptr(groupFd), uintptr(flags), uintptr(0))
err := error(nil)
if errno != 0 {
err = errno
}
return int(r1), err
}