blob: cfec3326bd744afe3b26a7e78ede07e56316635b (
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
54
55
56
|
// 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.
// Only works on systems with syscall.Close.
// We need a fast system call to provoke the race,
// and Close(-1) is nearly universally fast.
// +build darwin dragonfly freebsd linux netbsd openbsd plan9
package runtime_test
import (
"runtime"
"sync"
"sync/atomic"
"syscall"
"testing"
)
func TestGoroutineProfile(t *testing.T) {
// GoroutineProfile used to use the wrong starting sp for
// goroutines coming out of system calls, causing possible
// crashes.
defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(100))
var stop uint32
defer atomic.StoreUint32(&stop, 1) // in case of panic
var wg sync.WaitGroup
for i := 0; i < 4; i++ {
wg.Add(1)
go func() {
for atomic.LoadUint32(&stop) == 0 {
syscall.Close(-1)
}
wg.Done()
}()
}
max := 10000
if testing.Short() {
max = 100
}
stk := make([]runtime.StackRecord, 128)
for n := 0; n < max; n++ {
_, ok := runtime.GoroutineProfile(stk)
if !ok {
t.Fatalf("GoroutineProfile failed")
}
}
// If the program didn't crash, we passed.
atomic.StoreUint32(&stop, 1)
wg.Wait()
}
|
