1 files changed, 211 insertions, 0 deletions
diff --git a/pkg/flipcall/flipcall_test.go b/pkg/flipcall/flipcall_test.go
new file mode 100644
index 000000000..20d3002f0
--- /dev/null
+++ b/pkg/flipcall/flipcall_test.go
@@ -0,0 +1,211 @@
+// 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 (
+	"testing"
+	"time"
+)
+
+var testPacketWindowSize = pageSize
+
+func testSendRecv(t *testing.T, ctrlMode ControlMode) {
+	pwa, err := NewPacketWindowAllocator()
+	if err != nil {
+		t.Fatalf("failed to create PacketWindowAllocator: %v", err)
+	}
+	defer pwa.Destroy()
+	pwd, err := pwa.Allocate(testPacketWindowSize)
+	if err != nil {
+		t.Fatalf("PacketWindowAllocator.Allocate() failed: %v", err)
+	}
+
+	sendEP, err := NewEndpoint(ctrlMode, pwd)
+	if err != nil {
+		t.Fatalf("failed to create Endpoint: %v", err)
+	}
+	defer sendEP.Destroy()
+	recvEP, err := NewEndpoint(ctrlMode, pwd)
+	if err != nil {
+		t.Fatalf("failed to create Endpoint: %v", err)
+	}
+	defer recvEP.Destroy()
+
+	otherThreadDone := make(chan struct{})
+	go func() {
+		defer func() { otherThreadDone <- struct{}{} }()
+		t.Logf("initially-inactive Endpoint waiting for packet 1")
+		if _, err := recvEP.RecvFirst(); err != nil {
+			t.Fatalf("initially-inactive Endpoint.RecvFirst() failed: %v", err)
+		}
+		t.Logf("initially-inactive Endpoint got packet 1, sending packet 2 and waiting for packet 3")
+		if _, err := recvEP.SendRecv(0); err != nil {
+			t.Fatalf("initially-inactive Endpoint.SendRecv() failed: %v", err)
+		}
+		t.Logf("initially-inactive Endpoint got packet 3")
+	}()
+	defer func() {
+		t.Logf("waiting for initially-inactive Endpoint goroutine to complete")
+		<-otherThreadDone
+	}()
+
+	t.Logf("initially-active Endpoint sending packet 1 and waiting for packet 2")
+	if _, err := sendEP.SendRecv(0); err != nil {
+		t.Fatalf("initially-active Endpoint.SendRecv() failed: %v", err)
+	}
+	t.Logf("initially-active Endpoint got packet 2, sending packet 3")
+	if err := sendEP.SendLast(0); err != nil {
+		t.Fatalf("initially-active Endpoint.SendLast() failed: %v", err)
+	}
+}
+
+func TestFutexSendRecv(t *testing.T) {
+	testSendRecv(t, ControlModeFutex)
+}
+
+func testRecvFirstShutdown(t *testing.T, ctrlMode ControlMode) {
+	pwa, err := NewPacketWindowAllocator()
+	if err != nil {
+		t.Fatalf("failed to create PacketWindowAllocator: %v", err)
+	}
+	defer pwa.Destroy()
+	pwd, err := pwa.Allocate(testPacketWindowSize)
+	if err != nil {
+		t.Fatalf("PacketWindowAllocator.Allocate() failed: %v", err)
+	}
+
+	ep, err := NewEndpoint(ctrlMode, pwd)
+	if err != nil {
+		t.Fatalf("failed to create Endpoint: %v", err)
+	}
+	defer ep.Destroy()
+
+	otherThreadDone := make(chan struct{})
+	go func() {
+		defer func() { otherThreadDone <- struct{}{} }()
+		_, err := ep.RecvFirst()
+		if err == nil {
+			t.Errorf("Endpoint.RecvFirst() succeeded unexpectedly")
+		}
+	}()
+
+	time.Sleep(time.Second) // to ensure ep.RecvFirst() has blocked
+	ep.Shutdown()
+	<-otherThreadDone
+}
+
+func TestFutexRecvFirstShutdown(t *testing.T) {
+	testRecvFirstShutdown(t, ControlModeFutex)
+}
+
+func testSendRecvShutdown(t *testing.T, ctrlMode ControlMode) {
+	pwa, err := NewPacketWindowAllocator()
+	if err != nil {
+		t.Fatalf("failed to create PacketWindowAllocator: %v", err)
+	}
+	defer pwa.Destroy()
+	pwd, err := pwa.Allocate(testPacketWindowSize)
+	if err != nil {
+		t.Fatalf("PacketWindowAllocator.Allocate() failed: %v", err)
+	}
+
+	sendEP, err := NewEndpoint(ctrlMode, pwd)
+	if err != nil {
+		t.Fatalf("failed to create Endpoint: %v", err)
+	}
+	defer sendEP.Destroy()
+	recvEP, err := NewEndpoint(ctrlMode, pwd)
+	if err != nil {
+		t.Fatalf("failed to create Endpoint: %v", err)
+	}
+	defer recvEP.Destroy()
+
+	otherThreadDone := make(chan struct{})
+	go func() {
+		defer func() { otherThreadDone <- struct{}{} }()
+		if _, err := recvEP.RecvFirst(); err != nil {
+			t.Fatalf("initially-inactive Endpoint.RecvFirst() failed: %v", err)
+		}
+		if _, err := recvEP.SendRecv(0); err == nil {
+			t.Errorf("initially-inactive Endpoint.SendRecv() succeeded unexpectedly")
+		}
+	}()
+
+	if _, err := sendEP.SendRecv(0); err != nil {
+		t.Fatalf("initially-active Endpoint.SendRecv() failed: %v", err)
+	}
+	time.Sleep(time.Second) // to ensure recvEP.SendRecv() has blocked
+	recvEP.Shutdown()
+	<-otherThreadDone
+}
+
+func TestFutexSendRecvShutdown(t *testing.T) {
+	testSendRecvShutdown(t, ControlModeFutex)
+}
+
+func benchmarkSendRecv(b *testing.B, ctrlMode ControlMode) {
+	pwa, err := NewPacketWindowAllocator()
+	if err != nil {
+		b.Fatalf("failed to create PacketWindowAllocator: %v", err)
+	}
+	defer pwa.Destroy()
+	pwd, err := pwa.Allocate(testPacketWindowSize)
+	if err != nil {
+		b.Fatalf("PacketWindowAllocator.Allocate() failed: %v", err)
+	}
+
+	sendEP, err := NewEndpoint(ctrlMode, pwd)
+	if err != nil {
+		b.Fatalf("failed to create Endpoint: %v", err)
+	}
+	defer sendEP.Destroy()
+	recvEP, err := NewEndpoint(ctrlMode, pwd)
+	if err != nil {
+		b.Fatalf("failed to create Endpoint: %v", err)
+	}
+	defer recvEP.Destroy()
+
+	otherThreadDone := make(chan struct{})
+	go func() {
+		defer func() { otherThreadDone <- struct{}{} }()
+		if b.N == 0 {
+			return
+		}
+		if _, err := recvEP.RecvFirst(); err != nil {
+			b.Fatalf("initially-inactive Endpoint.RecvFirst() failed: %v", err)
+		}
+		for i := 1; i < b.N; i++ {
+			if _, err := recvEP.SendRecv(0); err != nil {
+				b.Fatalf("initially-inactive Endpoint.SendRecv() failed: %v", err)
+			}
+		}
+		if err := recvEP.SendLast(0); err != nil {
+			b.Fatalf("initially-inactive Endpoint.SendLast() failed: %v", err)
+		}
+	}()
+	defer func() { <-otherThreadDone }()
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		if _, err := sendEP.SendRecv(0); err != nil {
+			b.Fatalf("initially-active Endpoint.SendRecv() failed: %v", err)
+		}
+	}
+	b.StopTimer()
+}
+
+func BenchmarkFutexSendRecv(b *testing.B) {
+	benchmarkSendRecv(b, ControlModeFutex)
+}