mirror of
https://github.com/golang/go
synced 2024-11-20 07:54:39 -07:00
b2cdf30eb6
The conversion was done with an automated tool and then modified only as necessary to make it compile and run. [This CL is part of the removal of C code from package runtime. See golang.org/s/dev.cc for an overview.] LGTM=r R=r, daniel.morsing CC=austin, dvyukov, golang-codereviews, iant, khr https://golang.org/cl/172260043
78 lines
2.0 KiB
Go
78 lines
2.0 KiB
Go
// Copyright 2013 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.
|
|
|
|
// Futex is only available on DragonFly BSD, FreeBSD and Linux.
|
|
// The race detector emits calls to split stack functions so it breaks
|
|
// the test.
|
|
|
|
// +build dragonfly freebsd linux
|
|
// +build !race
|
|
|
|
package runtime_test
|
|
|
|
import (
|
|
"runtime"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
type futexsleepTest struct {
|
|
mtx uint32
|
|
ns int64
|
|
msg string
|
|
ch chan futexsleepTest
|
|
}
|
|
|
|
var futexsleepTests = []futexsleepTest{
|
|
beforeY2038: {mtx: 0, ns: 86400 * 1e9, msg: "before the year 2038", ch: make(chan futexsleepTest, 1)},
|
|
afterY2038: {mtx: 0, ns: (1<<31 + 100) * 1e9, msg: "after the year 2038", ch: make(chan futexsleepTest, 1)},
|
|
}
|
|
|
|
const (
|
|
beforeY2038 = iota
|
|
afterY2038
|
|
)
|
|
|
|
func TestFutexsleep(t *testing.T) {
|
|
if runtime.GOMAXPROCS(0) > 1 {
|
|
// futexsleep doesn't handle EINTR or other signals,
|
|
// so spurious wakeups may happen.
|
|
t.Skip("skipping; GOMAXPROCS>1")
|
|
}
|
|
|
|
start := time.Now()
|
|
for _, tt := range futexsleepTests {
|
|
go func(tt futexsleepTest) {
|
|
runtime.Entersyscall(0)
|
|
runtime.Futexsleep(&tt.mtx, tt.mtx, tt.ns)
|
|
runtime.Exitsyscall(0)
|
|
tt.ch <- tt
|
|
}(tt)
|
|
}
|
|
loop:
|
|
for {
|
|
select {
|
|
case tt := <-futexsleepTests[beforeY2038].ch:
|
|
t.Errorf("futexsleep test %q finished early after %s", tt.msg, time.Since(start))
|
|
break loop
|
|
case tt := <-futexsleepTests[afterY2038].ch:
|
|
// Looks like FreeBSD 10 kernel has changed
|
|
// the semantics of timedwait on userspace
|
|
// mutex to make broken stuff look broken.
|
|
switch {
|
|
case runtime.GOOS == "freebsd" && runtime.GOARCH == "386":
|
|
t.Log("freebsd/386 may not work correctly after the year 2038, see golang.org/issue/7194")
|
|
default:
|
|
t.Errorf("futexsleep test %q finished early after %s", tt.msg, time.Since(start))
|
|
break loop
|
|
}
|
|
case <-time.After(time.Second):
|
|
break loop
|
|
}
|
|
}
|
|
for _, tt := range futexsleepTests {
|
|
runtime.Futexwakeup(&tt.mtx, 1)
|
|
}
|
|
}
|