79 lines
2.0 KiB
Go
79 lines
2.0 KiB
Go
// Copyright 2018 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package eventfd
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import (
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"testing"
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"gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest"
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"gvisor.googlesource.com/gvisor/pkg/sentry/usermem"
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"gvisor.googlesource.com/gvisor/pkg/waiter"
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)
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func TestEventfd(t *testing.T) {
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initVals := []uint64{
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0,
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// Using a non-zero initial value verifies that writing to an
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// eventfd signals when the eventfd's counter was already
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// non-zero.
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343,
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}
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for _, initVal := range initVals {
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ctx := contexttest.Context(t)
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// Make a new event that is writable.
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event := New(ctx, initVal, false)
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// Register a callback for a write event.
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w, ch := waiter.NewChannelEntry(nil)
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event.EventRegister(&w, waiter.EventIn)
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defer event.EventUnregister(&w)
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data := []byte("00000124")
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// Create and submit a write request.
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n, err := event.Writev(ctx, usermem.BytesIOSequence(data))
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if err != nil {
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t.Fatal(err)
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}
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if n != 8 {
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t.Errorf("eventfd.write wrote %d bytes, not full int64", n)
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}
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// Check if the callback fired due to the write event.
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select {
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case <-ch:
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default:
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t.Errorf("Didn't get notified of EventIn after write")
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}
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}
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}
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func TestEventfdStat(t *testing.T) {
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ctx := contexttest.Context(t)
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// Make a new event that is writable.
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event := New(ctx, 0, false)
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// Create and submit an stat request.
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uattr, err := event.Dirent.Inode.UnstableAttr(ctx)
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if err != nil {
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t.Fatalf("eventfd stat request failed: %v", err)
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}
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if uattr.Size != 0 {
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t.Fatal("EventFD size should be 0")
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}
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}
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