Check in gVisor.

PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463

1 files changed, 54 insertions, 0 deletions

diff --git a/pkg/sentry/kernel/epoll/epoll_test.go b/pkg/sentry/kernel/epoll/epoll_test.go
new file mode 100644
index 000000000..bc869fc13
--- /dev/null
+++ b/pkg/sentry/kernel/epoll/epoll_test.go
@@ -0,0 +1,54 @@
+// Copyright 2018 Google Inc.
+//
+// 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 epoll
+
+import (
+	"testing"
+
+	"gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest"
+	"gvisor.googlesource.com/gvisor/pkg/sentry/fs/filetest"
+	"gvisor.googlesource.com/gvisor/pkg/waiter"
+)
+
+func TestFileDestroyed(t *testing.T) {
+	f := filetest.NewTestFile(t)
+	id := FileIdentifier{f, 12}
+
+	efile := NewEventPoll(contexttest.Context(t))
+	e := efile.FileOperations.(*EventPoll)
+	if err := e.AddEntry(id, 0, waiter.EventIn, [2]int32{}); err != nil {
+		t.Fatalf("addEntry failed: %v", err)
+	}
+
+	// Check that we get an event reported twice in a row.
+	evt := e.ReadEvents(1)
+	if len(evt) != 1 {
+		t.Fatalf("Unexpected number of ready events: want %v, got %v", 1, len(evt))
+	}
+
+	evt = e.ReadEvents(1)
+	if len(evt) != 1 {
+		t.Fatalf("Unexpected number of ready events: want %v, got %v", 1, len(evt))
+	}
+
+	// Destroy the file. Check that we get no more events.
+	f.DecRef()
+
+	evt = e.ReadEvents(1)
+	if len(evt) != 0 {
+		t.Fatalf("Unexpected number of ready events: want %v, got %v", 0, len(evt))
+	}
+
+}