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unix: add wrapper around perf_event_open on Linux

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This adds a wrapper around perf_event_open, exported constants and
two structs:
 - perf_event_attr, used to configure the syscall
 - perf_event_mmap_page to coordinate the kernel's mmap ring buffer

Change-Id: Ife7ded8344de9e3eb74441bd51ab9a04c81b4965
Reviewed-on: https://go-review.googlesource.com/105756
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Adam Sindelar
2018-04-16 11:22:24 +00:00
committed by Tobias Klauser
parent 2281fa97ef
commit 2f57af4873
24 changed files with 2190 additions and 0 deletions
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unix/zsyscall_linux_arm64.go
+11
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@@ -995,6 +995,17 @@ func Nanosleep(time *Timespec, leftover *Timespec) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func PerfEventOpen(attr *PerfEventAttr, pid int, cpu int, groupFd int, flags int) (fd int, err error) {
r0, _, e1 := Syscall6(SYS_PERF_EVENT_OPEN, uintptr(unsafe.Pointer(attr)), uintptr(pid), uintptr(cpu), uintptr(groupFd), uintptr(flags), 0)
fd = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func PivotRoot(newroot string, putold string) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(newroot)