mirror of
https://github.com/golang/go.git
synced 2025-12-08 06:10:04 +00:00
fdc167164e
The OS-independent sigmask type was not pulling its weight. Replace it with the OS-dependent sigset type. This requires adding an OS-specific sigaddset function, but permits removing the OS-specific sigmaskToSigset function. Change-Id: I43307b512b0264ec291baadaea902f05ce212305 Reviewed-on: https://go-review.googlesource.com/29950 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
62 lines
1.4 KiB
Go
62 lines
1.4 KiB
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 linux
|
|
// +build mips64 mips64le
|
|
|
|
package runtime
|
|
|
|
var randomNumber uint32
|
|
|
|
func archauxv(tag, val uintptr) {
|
|
switch tag {
|
|
case _AT_RANDOM:
|
|
// sysargs filled in startupRandomData, but that
|
|
// pointer may not be word aligned, so we must treat
|
|
// it as a byte array.
|
|
randomNumber = uint32(startupRandomData[4]) | uint32(startupRandomData[5])<<8 |
|
|
uint32(startupRandomData[6])<<16 | uint32(startupRandomData[7])<<24
|
|
}
|
|
}
|
|
|
|
//go:nosplit
|
|
func cputicks() int64 {
|
|
// Currently cputicks() is used in blocking profiler and to seed fastrand().
|
|
// nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
|
|
// randomNumber provides better seeding of fastrand.
|
|
return nanotime() + int64(randomNumber)
|
|
}
|
|
|
|
const (
|
|
_SS_DISABLE = 2
|
|
_NSIG = 65
|
|
_SI_USER = 0
|
|
_SIG_BLOCK = 1
|
|
_SIG_UNBLOCK = 2
|
|
_SIG_SETMASK = 3
|
|
_RLIMIT_AS = 6
|
|
)
|
|
|
|
type sigset [2]uint64
|
|
|
|
type rlimit struct {
|
|
rlim_cur uintptr
|
|
rlim_max uintptr
|
|
}
|
|
|
|
var sigset_all = sigset{^uint64(0), ^uint64(0)}
|
|
|
|
//go:nosplit
|
|
//go:nowritebarrierrec
|
|
func sigaddset(mask *sigset, i int) {
|
|
(*mask)[(i-1)/64] |= 1 << ((uint32(i) - 1) & 63)
|
|
}
|
|
|
|
func sigdelset(mask *sigset, i int) {
|
|
(*mask)[(i-1)/64] &^= 1 << ((uint32(i) - 1) & 63)
|
|
}
|
|
|
|
func sigfillset(mask *[2]uint64) {
|
|
(*mask)[0], (*mask)[1] = ^uint64(0), ^uint64(0)
|
|
}
|