blob: 08511fd2acaa249e06e83b7b813540f9dc5e6efa (
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
41
42
43
44
45
46
47
48
49
50
51
52
53
|
// Copyright 2009 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.
package runtime
import (
"unsafe"
)
// For C code to call:
//go:linkname minit runtime.minit
func goenvs() {
goenvs_unix()
}
// Called to initialize a new m (including the bootstrap m).
// Called on the parent thread (main thread in case of bootstrap), can allocate memory.
func mpreinit(mp *m) {
mp.gsignal = malg(true, true, &mp.gsignalstack, &mp.gsignalstacksize)
mp.gsignal.m = mp
}
// minit is called to initialize a new m (including the bootstrap m).
// Called on the new thread, cannot allocate memory.
func minit() {
minitSignals()
// FIXME: only works on linux for now.
getg().m.procid = uint64(gettid())
}
// Called from dropm to undo the effect of an minit.
//go:nosplit
//go:nowritebarrierrec
func unminit() {
unminitSignals()
}
var urandom_dev = []byte("/dev/urandom\x00")
func getRandomData(r []byte) {
if startupRandomData != nil {
n := copy(r, startupRandomData)
extendRandom(r, n)
return
}
fd := open(&urandom_dev[0], 0 /* O_RDONLY */, 0)
n := read(fd, unsafe.Pointer(&r[0]), int32(len(r)))
closefd(fd)
extendRandom(r, int(n))
}
|
