blob: 6c8e9cf76ef0098de3b3eed799f246911526aa77 [file] [log] [blame]
// 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.
//go:build !js
// +build !js
package net
import (
"errors"
"fmt"
"internal/testenv"
"io"
"net/internal/socktest"
"os"
"runtime"
"sync"
"testing"
"time"
)
var dialTimeoutTests = []struct {
timeout time.Duration
delta time.Duration // for deadline
guard time.Duration
max time.Duration
}{
// Tests that dial timeouts, deadlines in the past work.
{-5 * time.Second, 0, -5 * time.Second, 100 * time.Millisecond},
{0, -5 * time.Second, -5 * time.Second, 100 * time.Millisecond},
{-5 * time.Second, 5 * time.Second, -5 * time.Second, 100 * time.Millisecond}, // timeout over deadline
{-1 << 63, 0, time.Second, 100 * time.Millisecond},
{0, -1 << 63, time.Second, 100 * time.Millisecond},
{50 * time.Millisecond, 0, 100 * time.Millisecond, time.Second},
{0, 50 * time.Millisecond, 100 * time.Millisecond, time.Second},
{50 * time.Millisecond, 5 * time.Second, 100 * time.Millisecond, time.Second}, // timeout over deadline
}
func TestDialTimeout(t *testing.T) {
// Cannot use t.Parallel - modifies global hooks.
origTestHookDialChannel := testHookDialChannel
defer func() { testHookDialChannel = origTestHookDialChannel }()
defer sw.Set(socktest.FilterConnect, nil)
for i, tt := range dialTimeoutTests {
switch runtime.GOOS {
case "plan9", "windows":
testHookDialChannel = func() { time.Sleep(tt.guard) }
if runtime.GOOS == "plan9" {
break
}
fallthrough
default:
sw.Set(socktest.FilterConnect, func(so *socktest.Status) (socktest.AfterFilter, error) {
time.Sleep(tt.guard)
return nil, errTimedout
})
}
ch := make(chan error)
d := Dialer{Timeout: tt.timeout}
if tt.delta != 0 {
d.Deadline = time.Now().Add(tt.delta)
}
max := time.NewTimer(tt.max)
defer max.Stop()
go func() {
// This dial never starts to send any TCP SYN
// segment because of above socket filter and
// test hook.
c, err := d.Dial("tcp", "127.0.0.1:0")
if err == nil {
err = fmt.Errorf("unexpectedly established: tcp:%s->%s", c.LocalAddr(), c.RemoteAddr())
c.Close()
}
ch <- err
}()
select {
case <-max.C:
t.Fatalf("#%d: Dial didn't return in an expected time", i)
case err := <-ch:
if perr := parseDialError(err); perr != nil {
t.Errorf("#%d: %v", i, perr)
}
if nerr, ok := err.(Error); !ok || !nerr.Timeout() {
t.Fatalf("#%d: %v", i, err)
}
}
}
}
func TestDialTimeoutMaxDuration(t *testing.T) {
ln, err := newLocalListener("tcp")
if err != nil {
t.Fatal(err)
}
defer func() {
if err := ln.Close(); err != nil {
t.Error(err)
}
}()
for _, tt := range []struct {
timeout time.Duration
delta time.Duration // for deadline
}{
// Large timeouts that will overflow an int64 unix nanos.
{1<<63 - 1, 0},
{0, 1<<63 - 1},
} {
t.Run(fmt.Sprintf("timeout=%s/delta=%s", tt.timeout, tt.delta), func(t *testing.T) {
d := Dialer{Timeout: tt.timeout}
if tt.delta != 0 {
d.Deadline = time.Now().Add(tt.delta)
}
c, err := d.Dial(ln.Addr().Network(), ln.Addr().String())
if err != nil {
t.Fatal(err)
}
if err := c.Close(); err != nil {
t.Error(err)
}
})
}
}
var acceptTimeoutTests = []struct {
timeout time.Duration
xerrs [2]error // expected errors in transition
}{
// Tests that accept deadlines in the past work, even if
// there's incoming connections available.
{-5 * time.Second, [2]error{os.ErrDeadlineExceeded, os.ErrDeadlineExceeded}},
{50 * time.Millisecond, [2]error{nil, os.ErrDeadlineExceeded}},
}
func TestAcceptTimeout(t *testing.T) {
testenv.SkipFlaky(t, 17948)
t.Parallel()
switch runtime.GOOS {
case "plan9":
t.Skipf("not supported on %s", runtime.GOOS)
}
ln, err := newLocalListener("tcp")
if err != nil {
t.Fatal(err)
}
defer ln.Close()
var wg sync.WaitGroup
for i, tt := range acceptTimeoutTests {
if tt.timeout < 0 {
wg.Add(1)
go func() {
defer wg.Done()
d := Dialer{Timeout: 100 * time.Millisecond}
c, err := d.Dial(ln.Addr().Network(), ln.Addr().String())
if err != nil {
t.Error(err)
return
}
c.Close()
}()
}
if err := ln.(*TCPListener).SetDeadline(time.Now().Add(tt.timeout)); err != nil {
t.Fatalf("$%d: %v", i, err)
}
for j, xerr := range tt.xerrs {
for {
c, err := ln.Accept()
if xerr != nil {
if perr := parseAcceptError(err); perr != nil {
t.Errorf("#%d/%d: %v", i, j, perr)
}
if !isDeadlineExceeded(err) {
t.Fatalf("#%d/%d: %v", i, j, err)
}
}
if err == nil {
c.Close()
time.Sleep(10 * time.Millisecond)
continue
}
break
}
}
}
wg.Wait()
}
func TestAcceptTimeoutMustReturn(t *testing.T) {
t.Parallel()
switch runtime.GOOS {
case "plan9":
t.Skipf("not supported on %s", runtime.GOOS)
}
ln, err := newLocalListener("tcp")
if err != nil {
t.Fatal(err)
}
defer ln.Close()
max := time.NewTimer(time.Second)
defer max.Stop()
ch := make(chan error)
go func() {
if err := ln.(*TCPListener).SetDeadline(noDeadline); err != nil {
t.Error(err)
}
if err := ln.(*TCPListener).SetDeadline(time.Now().Add(10 * time.Millisecond)); err != nil {
t.Error(err)
}
c, err := ln.Accept()
if err == nil {
c.Close()
}
ch <- err
}()
select {
case <-max.C:
ln.Close()
<-ch // wait for tester goroutine to stop
t.Fatal("Accept didn't return in an expected time")
case err := <-ch:
if perr := parseAcceptError(err); perr != nil {
t.Error(perr)
}
if !isDeadlineExceeded(err) {
t.Fatal(err)
}
}
}
func TestAcceptTimeoutMustNotReturn(t *testing.T) {
t.Parallel()
switch runtime.GOOS {
case "plan9":
t.Skipf("not supported on %s", runtime.GOOS)
}
ln, err := newLocalListener("tcp")
if err != nil {
t.Fatal(err)
}
defer ln.Close()
max := time.NewTimer(100 * time.Millisecond)
defer max.Stop()
ch := make(chan error)
go func() {
if err := ln.(*TCPListener).SetDeadline(time.Now().Add(-5 * time.Second)); err != nil {
t.Error(err)
}
if err := ln.(*TCPListener).SetDeadline(noDeadline); err != nil {
t.Error(err)
}
_, err := ln.Accept()
ch <- err
}()
select {
case err := <-ch:
if perr := parseAcceptError(err); perr != nil {
t.Error(perr)
}
t.Fatalf("expected Accept to not return, but it returned with %v", err)
case <-max.C:
ln.Close()
<-ch // wait for tester goroutine to stop
}
}
var readTimeoutTests = []struct {
timeout time.Duration
xerrs [2]error // expected errors in transition
}{
// Tests that read deadlines work, even if there's data ready
// to be read.
{-5 * time.Second, [2]error{os.ErrDeadlineExceeded, os.ErrDeadlineExceeded}},
{50 * time.Millisecond, [2]error{nil, os.ErrDeadlineExceeded}},
}
func TestReadTimeout(t *testing.T) {
handler := func(ls *localServer, ln Listener) {
c, err := ln.Accept()
if err != nil {
t.Error(err)
return
}
c.Write([]byte("READ TIMEOUT TEST"))
defer c.Close()
}
ls, err := newLocalServer("tcp")
if err != nil {
t.Fatal(err)
}
defer ls.teardown()
if err := ls.buildup(handler); err != nil {
t.Fatal(err)
}
c, err := Dial(ls.Listener.Addr().Network(), ls.Listener.Addr().String())
if err != nil {
t.Fatal(err)
}
defer c.Close()
for i, tt := range readTimeoutTests {
if err := c.SetReadDeadline(time.Now().Add(tt.timeout)); err != nil {
t.Fatalf("#%d: %v", i, err)
}
var b [1]byte
for j, xerr := range tt.xerrs {
for {
n, err := c.Read(b[:])
if xerr != nil {
if perr := parseReadError(err); perr != nil {
t.Errorf("#%d/%d: %v", i, j, perr)
}
if !isDeadlineExceeded(err) {
t.Fatalf("#%d/%d: %v", i, j, err)
}
}
if err == nil {
time.Sleep(tt.timeout / 3)
continue
}
if n != 0 {
t.Fatalf("#%d/%d: read %d; want 0", i, j, n)
}
break
}
}
}
}
func TestReadTimeoutMustNotReturn(t *testing.T) {
t.Parallel()
switch runtime.GOOS {
case "plan9":
t.Skipf("not supported on %s", runtime.GOOS)
}
ln, err := newLocalListener("tcp")
if err != nil {
t.Fatal(err)
}
defer ln.Close()
c, err := Dial(ln.Addr().Network(), ln.Addr().String())
if err != nil {
t.Fatal(err)
}
defer c.Close()
max := time.NewTimer(100 * time.Millisecond)
defer max.Stop()
ch := make(chan error)
go func() {
if err := c.SetDeadline(time.Now().Add(-5 * time.Second)); err != nil {
t.Error(err)
}
if err := c.SetWriteDeadline(time.Now().Add(-5 * time.Second)); err != nil {
t.Error(err)
}
if err := c.SetReadDeadline(noDeadline); err != nil {
t.Error(err)
}
var b [1]byte
_, err := c.Read(b[:])
ch <- err
}()
select {
case err := <-ch:
if perr := parseReadError(err); perr != nil {
t.Error(perr)
}
t.Fatalf("expected Read to not return, but it returned with %v", err)
case <-max.C:
c.Close()
err := <-ch // wait for tester goroutine to stop
if perr := parseReadError(err); perr != nil {
t.Error(perr)
}
if nerr, ok := err.(Error); !ok || nerr.Timeout() || nerr.Temporary() {
t.Fatal(err)
}
}
}
var readFromTimeoutTests = []struct {
timeout time.Duration
xerrs [2]error // expected errors in transition
}{
// Tests that read deadlines work, even if there's data ready
// to be read.
{-5 * time.Second, [2]error{os.ErrDeadlineExceeded, os.ErrDeadlineExceeded}},
{50 * time.Millisecond, [2]error{nil, os.ErrDeadlineExceeded}},
}
func TestReadFromTimeout(t *testing.T) {
ch := make(chan Addr)
defer close(ch)
handler := func(ls *localPacketServer, c PacketConn) {
if dst, ok := <-ch; ok {
c.WriteTo([]byte("READFROM TIMEOUT TEST"), dst)
}
}
ls, err := newLocalPacketServer("udp")
if err != nil {
t.Fatal(err)
}
defer ls.teardown()
if err := ls.buildup(handler); err != nil {
t.Fatal(err)
}
host, _, err := SplitHostPort(ls.PacketConn.LocalAddr().String())
if err != nil {
t.Fatal(err)
}
c, err := ListenPacket(ls.PacketConn.LocalAddr().Network(), JoinHostPort(host, "0"))
if err != nil {
t.Fatal(err)
}
defer c.Close()
ch <- c.LocalAddr()
for i, tt := range readFromTimeoutTests {
if err := c.SetReadDeadline(time.Now().Add(tt.timeout)); err != nil {
t.Fatalf("#%d: %v", i, err)
}
var b [1]byte
for j, xerr := range tt.xerrs {
for {
n, _, err := c.ReadFrom(b[:])
if xerr != nil {
if perr := parseReadError(err); perr != nil {
t.Errorf("#%d/%d: %v", i, j, perr)
}
if !isDeadlineExceeded(err) {
t.Fatalf("#%d/%d: %v", i, j, err)
}
}
if err == nil {
time.Sleep(tt.timeout / 3)
continue
}
if nerr, ok := err.(Error); ok && nerr.Timeout() && n != 0 {
t.Fatalf("#%d/%d: read %d; want 0", i, j, n)
}
break
}
}
}
}
var writeTimeoutTests = []struct {
timeout time.Duration
xerrs [2]error // expected errors in transition
}{
// Tests that write deadlines work, even if there's buffer
// space available to write.
{-5 * time.Second, [2]error{os.ErrDeadlineExceeded, os.ErrDeadlineExceeded}},
{10 * time.Millisecond, [2]error{nil, os.ErrDeadlineExceeded}},
}
func TestWriteTimeout(t *testing.T) {
t.Parallel()
ln, err := newLocalListener("tcp")
if err != nil {
t.Fatal(err)
}
defer ln.Close()
for i, tt := range writeTimeoutTests {
c, err := Dial(ln.Addr().Network(), ln.Addr().String())
if err != nil {
t.Fatal(err)
}
defer c.Close()
if err := c.SetWriteDeadline(time.Now().Add(tt.timeout)); err != nil {
t.Fatalf("#%d: %v", i, err)
}
for j, xerr := range tt.xerrs {
for {
n, err := c.Write([]byte("WRITE TIMEOUT TEST"))
if xerr != nil {
if perr := parseWriteError(err); perr != nil {
t.Errorf("#%d/%d: %v", i, j, perr)
}
if !isDeadlineExceeded(err) {
t.Fatalf("#%d/%d: %v", i, j, err)
}
}
if err == nil {
time.Sleep(tt.timeout / 3)
continue
}
if n != 0 {
t.Fatalf("#%d/%d: wrote %d; want 0", i, j, n)
}
break
}
}
}
}
func TestWriteTimeoutMustNotReturn(t *testing.T) {
t.Parallel()
switch runtime.GOOS {
case "plan9":
t.Skipf("not supported on %s", runtime.GOOS)
}
ln, err := newLocalListener("tcp")
if err != nil {
t.Fatal(err)
}
defer ln.Close()
c, err := Dial(ln.Addr().Network(), ln.Addr().String())
if err != nil {
t.Fatal(err)
}
defer c.Close()
max := time.NewTimer(100 * time.Millisecond)
defer max.Stop()
ch := make(chan error)
go func() {
if err := c.SetDeadline(time.Now().Add(-5 * time.Second)); err != nil {
t.Error(err)
}
if err := c.SetReadDeadline(time.Now().Add(-5 * time.Second)); err != nil {
t.Error(err)
}
if err := c.SetWriteDeadline(noDeadline); err != nil {
t.Error(err)
}
var b [1]byte
for {
if _, err := c.Write(b[:]); err != nil {
ch <- err
break
}
}
}()
select {
case err := <-ch:
if perr := parseWriteError(err); perr != nil {
t.Error(perr)
}
t.Fatalf("expected Write to not return, but it returned with %v", err)
case <-max.C:
c.Close()
err := <-ch // wait for tester goroutine to stop
if perr := parseWriteError(err); perr != nil {
t.Error(perr)
}
if nerr, ok := err.(Error); !ok || nerr.Timeout() || nerr.Temporary() {
t.Fatal(err)
}
}
}
var writeToTimeoutTests = []struct {
timeout time.Duration
xerrs [2]error // expected errors in transition
}{
// Tests that write deadlines work, even if there's buffer
// space available to write.
{-5 * time.Second, [2]error{os.ErrDeadlineExceeded, os.ErrDeadlineExceeded}},
{10 * time.Millisecond, [2]error{nil, os.ErrDeadlineExceeded}},
}
func TestWriteToTimeout(t *testing.T) {
t.Parallel()
c1, err := newLocalPacketListener("udp")
if err != nil {
t.Fatal(err)
}
defer c1.Close()
host, _, err := SplitHostPort(c1.LocalAddr().String())
if err != nil {
t.Fatal(err)
}
for i, tt := range writeToTimeoutTests {
c2, err := ListenPacket(c1.LocalAddr().Network(), JoinHostPort(host, "0"))
if err != nil {
t.Fatal(err)
}
defer c2.Close()
if err := c2.SetWriteDeadline(time.Now().Add(tt.timeout)); err != nil {
t.Fatalf("#%d: %v", i, err)
}
for j, xerr := range tt.xerrs {
for {
n, err := c2.WriteTo([]byte("WRITETO TIMEOUT TEST"), c1.LocalAddr())
if xerr != nil {
if perr := parseWriteError(err); perr != nil {
t.Errorf("#%d/%d: %v", i, j, perr)
}
if !isDeadlineExceeded(err) {
t.Fatalf("#%d/%d: %v", i, j, err)
}
}
if err == nil {
time.Sleep(tt.timeout / 3)
continue
}
if n != 0 {
t.Fatalf("#%d/%d: wrote %d; want 0", i, j, n)
}
break
}
}
}
}
func TestReadTimeoutFluctuation(t *testing.T) {
t.Parallel()
ln, err := newLocalListener("tcp")
if err != nil {
t.Fatal(err)
}
defer ln.Close()
c, err := Dial(ln.Addr().Network(), ln.Addr().String())
if err != nil {
t.Fatal(err)
}
defer c.Close()
max := time.NewTimer(time.Second)
defer max.Stop()
ch := make(chan error)
go timeoutReceiver(c, 100*time.Millisecond, 50*time.Millisecond, 250*time.Millisecond, ch)
select {
case <-max.C:
t.Fatal("Read took over 1s; expected 0.1s")
case err := <-ch:
if perr := parseReadError(err); perr != nil {
t.Error(perr)
}
if !isDeadlineExceeded(err) {
t.Fatal(err)
}
}
}
func TestReadFromTimeoutFluctuation(t *testing.T) {
t.Parallel()
c1, err := newLocalPacketListener("udp")
if err != nil {
t.Fatal(err)
}
defer c1.Close()
c2, err := Dial(c1.LocalAddr().Network(), c1.LocalAddr().String())
if err != nil {
t.Fatal(err)
}
defer c2.Close()
max := time.NewTimer(time.Second)
defer max.Stop()
ch := make(chan error)
go timeoutPacketReceiver(c2.(PacketConn), 100*time.Millisecond, 50*time.Millisecond, 250*time.Millisecond, ch)
select {
case <-max.C:
t.Fatal("ReadFrom took over 1s; expected 0.1s")
case err := <-ch:
if perr := parseReadError(err); perr != nil {
t.Error(perr)
}
if !isDeadlineExceeded(err) {
t.Fatal(err)
}
}
}
func TestWriteTimeoutFluctuation(t *testing.T) {
t.Parallel()
switch runtime.GOOS {
case "plan9":
t.Skipf("not supported on %s", runtime.GOOS)
}
ln, err := newLocalListener("tcp")
if err != nil {
t.Fatal(err)
}
defer ln.Close()
c, err := Dial(ln.Addr().Network(), ln.Addr().String())
if err != nil {
t.Fatal(err)
}
defer c.Close()
d := time.Second
if iOS() {
d = 3 * time.Second // see golang.org/issue/10775
}
max := time.NewTimer(d)
defer max.Stop()
ch := make(chan error)
go timeoutTransmitter(c, 100*time.Millisecond, 50*time.Millisecond, 250*time.Millisecond, ch)
select {
case <-max.C:
t.Fatalf("Write took over %v; expected 0.1s", d)
case err := <-ch:
if perr := parseWriteError(err); perr != nil {
t.Error(perr)
}
if !isDeadlineExceeded(err) {
t.Fatal(err)
}
}
}
func TestVariousDeadlines(t *testing.T) {
t.Parallel()
testVariousDeadlines(t)
}
func TestVariousDeadlines1Proc(t *testing.T) {
// Cannot use t.Parallel - modifies global GOMAXPROCS.
if testing.Short() {
t.Skip("skipping in short mode")
}
defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(1))
testVariousDeadlines(t)
}
func TestVariousDeadlines4Proc(t *testing.T) {
// Cannot use t.Parallel - modifies global GOMAXPROCS.
if testing.Short() {
t.Skip("skipping in short mode")
}
defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(4))
testVariousDeadlines(t)
}
type neverEnding byte
func (b neverEnding) Read(p []byte) (int, error) {
for i := range p {
p[i] = byte(b)
}
return len(p), nil
}
func testVariousDeadlines(t *testing.T) {
if runtime.GOOS == "plan9" {
t.Skip("skipping test on plan9; see golang.org/issue/26945")
}
type result struct {
n int64
err error
d time.Duration
}
handler := func(ls *localServer, ln Listener) {
for {
c, err := ln.Accept()
if err != nil {
break
}
c.Read(make([]byte, 1)) // wait for client to close connection
c.Close()
}
}
ls, err := newLocalServer("tcp")
if err != nil {
t.Fatal(err)
}
defer ls.teardown()
if err := ls.buildup(handler); err != nil {
t.Fatal(err)
}
for _, timeout := range []time.Duration{
1 * time.Nanosecond,
2 * time.Nanosecond,
5 * time.Nanosecond,
50 * time.Nanosecond,
100 * time.Nanosecond,
200 * time.Nanosecond,
500 * time.Nanosecond,
750 * time.Nanosecond,
1 * time.Microsecond,
5 * time.Microsecond,
25 * time.Microsecond,
250 * time.Microsecond,
500 * time.Microsecond,
1 * time.Millisecond,
5 * time.Millisecond,
100 * time.Millisecond,
250 * time.Millisecond,
500 * time.Millisecond,
1 * time.Second,
} {
numRuns := 3
if testing.Short() {
numRuns = 1
if timeout > 500*time.Microsecond {
continue
}
}
for run := 0; run < numRuns; run++ {
name := fmt.Sprintf("%v %d/%d", timeout, run, numRuns)
t.Log(name)
tooSlow := time.NewTimer(5 * time.Second)
defer tooSlow.Stop()
c, err := Dial(ls.Listener.Addr().Network(), ls.Listener.Addr().String())
if err != nil {
t.Fatal(err)
}
ch := make(chan result, 1)
go func() {
t0 := time.Now()
if err := c.SetDeadline(t0.Add(timeout)); err != nil {
t.Error(err)
}
n, err := io.Copy(io.Discard, c)
dt := time.Since(t0)
c.Close()
ch <- result{n, err, dt}
}()
select {
case res := <-ch:
if nerr, ok := res.err.(Error); ok && nerr.Timeout() {
t.Logf("%v: good timeout after %v; %d bytes", name, res.d, res.n)
} else {
t.Fatalf("%v: Copy = %d, %v; want timeout", name, res.n, res.err)
}
case <-tooSlow.C:
t.Fatalf("%v: client stuck in Dial+Copy", name)
}
}
}
}
// TestReadWriteProlongedTimeout tests concurrent deadline
// modification. Known to cause data races in the past.
func TestReadWriteProlongedTimeout(t *testing.T) {
t.Parallel()
switch runtime.GOOS {
case "plan9":
t.Skipf("not supported on %s", runtime.GOOS)
}
handler := func(ls *localServer, ln Listener) {
c, err := ln.Accept()
if err != nil {
t.Error(err)
return
}
defer c.Close()
var wg sync.WaitGroup
wg.Add(2)
go func() {
defer wg.Done()
var b [1]byte
for {
if err := c.SetReadDeadline(time.Now().Add(time.Hour)); err != nil {
if perr := parseCommonError(err); perr != nil {
t.Error(perr)
}
t.Error(err)
return
}
if _, err := c.Read(b[:]); err != nil {
if perr := parseReadError(err); perr != nil {
t.Error(perr)
}
return
}
}
}()
go func() {
defer wg.Done()
var b [1]byte
for {
if err := c.SetWriteDeadline(time.Now().Add(time.Hour)); err != nil {
if perr := parseCommonError(err); perr != nil {
t.Error(perr)
}
t.Error(err)
return
}
if _, err := c.Write(b[:]); err != nil {
if perr := parseWriteError(err); perr != nil {
t.Error(perr)
}
return
}
}
}()
wg.Wait()
}
ls, err := newLocalServer("tcp")
if err != nil {
t.Fatal(err)
}
defer ls.teardown()
if err := ls.buildup(handler); err != nil {
t.Fatal(err)
}
c, err := Dial(ls.Listener.Addr().Network(), ls.Listener.Addr().String())
if err != nil {
t.Fatal(err)
}
defer c.Close()
var b [1]byte
for i := 0; i < 1000; i++ {
c.Write(b[:])
c.Read(b[:])
}
}
func TestReadWriteDeadlineRace(t *testing.T) {
t.Parallel()
N := 1000
if testing.Short() {
N = 50
}
ln, err := newLocalListener("tcp")
if err != nil {
t.Fatal(err)
}
defer ln.Close()
c, err := Dial(ln.Addr().Network(), ln.Addr().String())
if err != nil {
t.Fatal(err)
}
defer c.Close()
var wg sync.WaitGroup
wg.Add(3)
go func() {
defer wg.Done()
tic := time.NewTicker(2 * time.Microsecond)
defer tic.Stop()
for i := 0; i < N; i++ {
if err := c.SetReadDeadline(time.Now().Add(2 * time.Microsecond)); err != nil {
if perr := parseCommonError(err); perr != nil {
t.Error(perr)
}
break
}
if err := c.SetWriteDeadline(time.Now().Add(2 * time.Microsecond)); err != nil {
if perr := parseCommonError(err); perr != nil {
t.Error(perr)
}
break
}
<-tic.C
}
}()
go func() {
defer wg.Done()
var b [1]byte
for i := 0; i < N; i++ {
c.Read(b[:]) // ignore possible timeout errors
}
}()
go func() {
defer wg.Done()
var b [1]byte
for i := 0; i < N; i++ {
c.Write(b[:]) // ignore possible timeout errors
}
}()
wg.Wait() // wait for tester goroutine to stop
}
// Issue 35367.
func TestConcurrentSetDeadline(t *testing.T) {
ln, err := newLocalListener("tcp")
if err != nil {
t.Fatal(err)
}
defer ln.Close()
const goroutines = 8
const conns = 10
const tries = 100
var c [conns]Conn
for i := 0; i < conns; i++ {
c[i], err = Dial(ln.Addr().Network(), ln.Addr().String())
if err != nil {
t.Fatal(err)
}
defer c[i].Close()
}
var wg sync.WaitGroup
wg.Add(goroutines)
now := time.Now()
for i := 0; i < goroutines; i++ {
go func(i int) {
defer wg.Done()
// Make the deadlines steadily earlier,
// to trigger runtime adjusttimers calls.
for j := tries; j > 0; j-- {
for k := 0; k < conns; k++ {
c[k].SetReadDeadline(now.Add(2*time.Hour + time.Duration(i*j*k)*time.Second))
c[k].SetWriteDeadline(now.Add(1*time.Hour + time.Duration(i*j*k)*time.Second))
}
}
}(i)
}
wg.Wait()
}
// isDeadlineExceeded reports whether err is or wraps os.ErrDeadlineExceeded.
// We also check that the error implements net.Error, and that the
// Timeout method returns true.
func isDeadlineExceeded(err error) bool {
nerr, ok := err.(Error)
if !ok {
return false
}
if !nerr.Timeout() {
return false
}
if !errors.Is(err, os.ErrDeadlineExceeded) {
return false
}
return true
}