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// Copyright 2019 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package flipcall
import (
"runtime"
"sync"
"testing"
"time"
)
var testPacketWindowSize = pageSize
type testConnection struct {
pwa PacketWindowAllocator
clientEP Endpoint
serverEP Endpoint
}
func newTestConnectionWithOptions(tb testing.TB, clientOpts, serverOpts []EndpointOption) *testConnection {
c := &testConnection{}
if err := c.pwa.Init(); err != nil {
tb.Fatalf("failed to create PacketWindowAllocator: %v", err)
}
pwd, err := c.pwa.Allocate(testPacketWindowSize)
if err != nil {
c.pwa.Destroy()
tb.Fatalf("PacketWindowAllocator.Allocate() failed: %v", err)
}
if err := c.clientEP.Init(pwd, clientOpts...); err != nil {
c.pwa.Destroy()
tb.Fatalf("failed to create client Endpoint: %v", err)
}
if err := c.serverEP.Init(pwd, serverOpts...); err != nil {
c.pwa.Destroy()
c.clientEP.Destroy()
tb.Fatalf("failed to create server Endpoint: %v", err)
}
return c
}
func newTestConnection(tb testing.TB) *testConnection {
return newTestConnectionWithOptions(tb, nil, nil)
}
func (c *testConnection) destroy() {
c.pwa.Destroy()
c.clientEP.Destroy()
c.serverEP.Destroy()
}
func testSendRecv(t *testing.T, c *testConnection) {
var serverRun sync.WaitGroup
serverRun.Add(1)
go func() {
defer serverRun.Done()
t.Logf("server Endpoint waiting for packet 1")
if _, err := c.serverEP.RecvFirst(); err != nil {
t.Fatalf("server Endpoint.RecvFirst() failed: %v", err)
}
t.Logf("server Endpoint got packet 1, sending packet 2 and waiting for packet 3")
if _, err := c.serverEP.SendRecv(0); err != nil {
t.Fatalf("server Endpoint.SendRecv() failed: %v", err)
}
t.Logf("server Endpoint got packet 3")
}()
defer func() {
// Ensure that the server goroutine is cleaned up before
// c.serverEP.Destroy(), even if the test fails.
c.serverEP.Shutdown()
serverRun.Wait()
}()
t.Logf("client Endpoint establishing connection")
if err := c.clientEP.Connect(); err != nil {
t.Fatalf("client Endpoint.Connect() failed: %v", err)
}
t.Logf("client Endpoint sending packet 1 and waiting for packet 2")
if _, err := c.clientEP.SendRecv(0); err != nil {
t.Fatalf("client Endpoint.SendRecv() failed: %v", err)
}
t.Logf("client Endpoint got packet 2, sending packet 3")
if err := c.clientEP.SendLast(0); err != nil {
t.Fatalf("client Endpoint.SendLast() failed: %v", err)
}
t.Logf("waiting for server goroutine to complete")
serverRun.Wait()
}
func TestSendRecv(t *testing.T) {
c := newTestConnection(t)
defer c.destroy()
testSendRecv(t, c)
}
func testShutdownConnect(t *testing.T, c *testConnection) {
var clientRun sync.WaitGroup
clientRun.Add(1)
go func() {
defer clientRun.Done()
if err := c.clientEP.Connect(); err == nil {
t.Errorf("client Endpoint.Connect() succeeded unexpectedly")
}
}()
time.Sleep(time.Second) // to allow c.clientEP.Connect() to block
c.clientEP.Shutdown()
clientRun.Wait()
}
func TestShutdownConnect(t *testing.T) {
c := newTestConnection(t)
defer c.destroy()
testShutdownConnect(t, c)
}
func testShutdownRecvFirstBeforeConnect(t *testing.T, c *testConnection) {
var serverRun sync.WaitGroup
serverRun.Add(1)
go func() {
defer serverRun.Done()
_, err := c.serverEP.RecvFirst()
if err == nil {
t.Errorf("server Endpoint.RecvFirst() succeeded unexpectedly")
}
}()
time.Sleep(time.Second) // to allow c.serverEP.RecvFirst() to block
c.serverEP.Shutdown()
serverRun.Wait()
}
func TestShutdownRecvFirstBeforeConnect(t *testing.T) {
c := newTestConnection(t)
defer c.destroy()
testShutdownRecvFirstBeforeConnect(t, c)
}
func testShutdownRecvFirstAfterConnect(t *testing.T, c *testConnection) {
var serverRun sync.WaitGroup
serverRun.Add(1)
go func() {
defer serverRun.Done()
if _, err := c.serverEP.RecvFirst(); err == nil {
t.Fatalf("server Endpoint.RecvFirst() succeeded unexpectedly")
}
}()
defer func() {
// Ensure that the server goroutine is cleaned up before
// c.serverEP.Destroy(), even if the test fails.
c.serverEP.Shutdown()
serverRun.Wait()
}()
if err := c.clientEP.Connect(); err != nil {
t.Fatalf("client Endpoint.Connect() failed: %v", err)
}
c.serverEP.Shutdown()
serverRun.Wait()
}
func TestShutdownRecvFirstAfterConnect(t *testing.T) {
c := newTestConnection(t)
defer c.destroy()
testShutdownRecvFirstAfterConnect(t, c)
}
func testShutdownSendRecv(t *testing.T, c *testConnection) {
var serverRun sync.WaitGroup
serverRun.Add(1)
go func() {
defer serverRun.Done()
if _, err := c.serverEP.RecvFirst(); err != nil {
t.Fatalf("server Endpoint.RecvFirst() failed: %v", err)
}
if _, err := c.serverEP.SendRecv(0); err == nil {
t.Errorf("server Endpoint.SendRecv() succeeded unexpectedly")
}
}()
defer func() {
// Ensure that the server goroutine is cleaned up before
// c.serverEP.Destroy(), even if the test fails.
c.serverEP.Shutdown()
serverRun.Wait()
}()
if err := c.clientEP.Connect(); err != nil {
t.Fatalf("client Endpoint.Connect() failed: %v", err)
}
if _, err := c.clientEP.SendRecv(0); err != nil {
t.Fatalf("client Endpoint.SendRecv() failed: %v", err)
}
time.Sleep(time.Second) // to allow serverEP.SendRecv() to block
c.serverEP.Shutdown()
serverRun.Wait()
}
func TestShutdownSendRecv(t *testing.T) {
c := newTestConnection(t)
defer c.destroy()
testShutdownSendRecv(t, c)
}
func benchmarkSendRecv(b *testing.B, c *testConnection) {
var serverRun sync.WaitGroup
serverRun.Add(1)
go func() {
defer serverRun.Done()
if b.N == 0 {
return
}
if _, err := c.serverEP.RecvFirst(); err != nil {
b.Fatalf("server Endpoint.RecvFirst() failed: %v", err)
}
for i := 1; i < b.N; i++ {
if _, err := c.serverEP.SendRecv(0); err != nil {
b.Fatalf("server Endpoint.SendRecv() failed: %v", err)
}
}
if err := c.serverEP.SendLast(0); err != nil {
b.Fatalf("server Endpoint.SendLast() failed: %v", err)
}
}()
defer func() {
c.serverEP.Shutdown()
serverRun.Wait()
}()
if err := c.clientEP.Connect(); err != nil {
b.Fatalf("client Endpoint.Connect() failed: %v", err)
}
runtime.GC()
b.ResetTimer()
for i := 0; i < b.N; i++ {
if _, err := c.clientEP.SendRecv(0); err != nil {
b.Fatalf("client Endpoint.SendRecv() failed: %v", err)
}
}
b.StopTimer()
}
func BenchmarkSendRecv(b *testing.B) {
c := newTestConnection(b)
defer c.destroy()
benchmarkSendRecv(b, c)
}
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