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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
// 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.
package http_test
import (
"net/http"
"runtime"
"sort"
"strings"
"testing"
"time"
)
func interestingGoroutines() (gs []string) {
buf := make([]byte, 2<<20)
buf = buf[:runtime.Stack(buf, true)]
for _, g := range strings.Split(string(buf), "\n\n") {
sl := strings.SplitN(g, "\n", 2)
if len(sl) != 2 {
continue
}
stack := strings.TrimSpace(sl[1])
if stack == "" ||
strings.Contains(stack, "created by net.newPollServer") ||
strings.Contains(stack, "created by net.startServer") ||
strings.Contains(stack, "created by testing.RunTests") ||
strings.Contains(stack, "closeWriteAndWait") ||
strings.Contains(stack, "testing.Main(") ||
// These only show up with GOTRACEBACK=2; Issue 5005 (comment 28)
strings.Contains(stack, "runtime.goexit") ||
strings.Contains(stack, "created by runtime.gc") ||
strings.Contains(stack, "runtime.MHeap_Scavenger") {
continue
}
gs = append(gs, stack)
}
sort.Strings(gs)
return
}
// Verify the other tests didn't leave any goroutines running.
// This is in a file named z_last_test.go so it sorts at the end.
func TestGoroutinesRunning(t *testing.T) {
if testing.Short() {
t.Skip("not counting goroutines for leakage in -short mode")
}
gs := interestingGoroutines()
n := 0
stackCount := make(map[string]int)
for _, g := range gs {
stackCount[g]++
n++
}
t.Logf("num goroutines = %d", n)
if n > 0 {
t.Error("Too many goroutines.")
for stack, count := range stackCount {
t.Logf("%d instances of:\n%s", count, stack)
}
}
}
func afterTest(t *testing.T) {
http.DefaultTransport.(*http.Transport).CloseIdleConnections()
if testing.Short() {
return
}
var bad string
badSubstring := map[string]string{
").readLoop(": "a Transport",
").writeLoop(": "a Transport",
"created by net/http/httptest.(*Server).Start": "an httptest.Server",
"timeoutHandler": "a TimeoutHandler",
"net.(*netFD).connect(": "a timing out dial",
").noteClientGone(": "a closenotifier sender",
}
var stacks string
for i := 0; i < 4; i++ {
bad = ""
stacks = strings.Join(interestingGoroutines(), "\n\n")
for substr, what := range badSubstring {
if strings.Contains(stacks, substr) {
bad = what
}
}
if bad == "" {
return
}
// Bad stuff found, but goroutines might just still be
// shutting down, so give it some time.
time.Sleep(250 * time.Millisecond)
}
t.Errorf("Test appears to have leaked %s:\n%s", bad, stacks)
}
|
