mirror of
https://github.com/tailscale/tailscale.git
synced 2024-11-25 19:15:34 +00:00
806de4ac94
This could happen when a process disappeared while we were reading its
file descriptor list.
I was able to replicate the problem by running this in another
terminal:
while :; do for i in $(seq 10); do
/bin/true & done >&/dev/null; wait >&/dev/null;
done
And then running the portlist tests thousands of times.
Fixes #339.
Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
59 lines
1.1 KiB
Go
59 lines
1.1 KiB
Go
// Copyright (c) 2020 Tailscale Inc & 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 portlist
|
|
|
|
import (
|
|
"net"
|
|
"testing"
|
|
|
|
"tailscale.com/tstest"
|
|
)
|
|
|
|
func TestGetList(t *testing.T) {
|
|
rc := tstest.NewResourceCheck()
|
|
defer rc.Assert(t)
|
|
|
|
pl, err := GetList(nil)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
for i, p := range pl {
|
|
t.Logf("[%d] %+v", i, p)
|
|
}
|
|
t.Logf("As String: %v", pl.String())
|
|
}
|
|
|
|
func TestIgnoreLocallyBoundPorts(t *testing.T) {
|
|
rc := tstest.NewResourceCheck()
|
|
defer rc.Assert(t)
|
|
|
|
ln, err := net.Listen("tcp", "127.0.0.1:0")
|
|
if err != nil {
|
|
t.Skipf("failed to bind: %v", err)
|
|
}
|
|
defer ln.Close()
|
|
ta := ln.Addr().(*net.TCPAddr)
|
|
port := ta.Port
|
|
pl, err := GetList(nil)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
for _, p := range pl {
|
|
if p.Proto == "tcp" && int(p.Port) == port {
|
|
t.Fatal("didn't expect to find test's localhost ephemeral port")
|
|
}
|
|
}
|
|
}
|
|
|
|
func BenchmarkGetList(b *testing.B) {
|
|
b.ReportAllocs()
|
|
for i := 0; i < b.N; i++ {
|
|
_, err := GetList(nil)
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
}
|
|
}
|