diff options
Diffstat (limited to 'pkg/atomicbitops/atomicbitops_test.go')
| -rw-r--r-- | pkg/atomicbitops/atomicbitops_test.go | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/pkg/atomicbitops/atomicbitops_test.go b/pkg/atomicbitops/atomicbitops_test.go deleted file mode 100644 index 73af71bb4..000000000 --- a/pkg/atomicbitops/atomicbitops_test.go +++ /dev/null @@ -1,198 +0,0 @@ -// Copyright 2018 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 atomicbitops - -import ( - "runtime" - "testing" - - "gvisor.dev/gvisor/pkg/sync" -) - -const iterations = 100 - -func detectRaces32(val, target uint32, fn func(*uint32, uint32)) bool { - runtime.GOMAXPROCS(100) - for n := 0; n < iterations; n++ { - x := val - var wg sync.WaitGroup - for i := uint32(0); i < 32; i++ { - wg.Add(1) - go func(a *uint32, i uint32) { - defer wg.Done() - fn(a, uint32(1<<i)) - }(&x, i) - } - wg.Wait() - if x != target { - return true - } - } - return false -} - -func detectRaces64(val, target uint64, fn func(*uint64, uint64)) bool { - runtime.GOMAXPROCS(100) - for n := 0; n < iterations; n++ { - x := val - var wg sync.WaitGroup - for i := uint64(0); i < 64; i++ { - wg.Add(1) - go func(a *uint64, i uint64) { - defer wg.Done() - fn(a, uint64(1<<i)) - }(&x, i) - } - wg.Wait() - if x != target { - return true - } - } - return false -} - -func TestOrUint32(t *testing.T) { - if detectRaces32(0x0, 0xffffffff, OrUint32) { - t.Error("Data race detected!") - } -} - -func TestAndUint32(t *testing.T) { - if detectRaces32(0xf0f0f0f0, 0x00000000, AndUint32) { - t.Error("Data race detected!") - } -} - -func TestXorUint32(t *testing.T) { - if detectRaces32(0xf0f0f0f0, 0x0f0f0f0f, XorUint32) { - t.Error("Data race detected!") - } -} - -func TestOrUint64(t *testing.T) { - if detectRaces64(0x0, 0xffffffffffffffff, OrUint64) { - t.Error("Data race detected!") - } -} - -func TestAndUint64(t *testing.T) { - if detectRaces64(0xf0f0f0f0f0f0f0f0, 0x0, AndUint64) { - t.Error("Data race detected!") - } -} - -func TestXorUint64(t *testing.T) { - if detectRaces64(0xf0f0f0f0f0f0f0f0, 0x0f0f0f0f0f0f0f0f, XorUint64) { - t.Error("Data race detected!") - } -} - -func TestCompareAndSwapUint32(t *testing.T) { - tests := []struct { - name string - prev uint32 - old uint32 - new uint32 - next uint32 - }{ - { - name: "Successful compare-and-swap with prev == new", - prev: 10, - old: 10, - new: 10, - next: 10, - }, - { - name: "Successful compare-and-swap with prev != new", - prev: 20, - old: 20, - new: 22, - next: 22, - }, - { - name: "Failed compare-and-swap with prev == new", - prev: 31, - old: 30, - new: 31, - next: 31, - }, - { - name: "Failed compare-and-swap with prev != new", - prev: 41, - old: 40, - new: 42, - next: 41, - }, - } - for _, test := range tests { - val := test.prev - prev := CompareAndSwapUint32(&val, test.old, test.new) - if got, want := prev, test.prev; got != want { - t.Errorf("%s: incorrect returned previous value: got %d, expected %d", test.name, got, want) - } - if got, want := val, test.next; got != want { - t.Errorf("%s: incorrect value stored in val: got %d, expected %d", test.name, got, want) - } - } -} - -func TestCompareAndSwapUint64(t *testing.T) { - tests := []struct { - name string - prev uint64 - old uint64 - new uint64 - next uint64 - }{ - { - name: "Successful compare-and-swap with prev == new", - prev: 0x100000000, - old: 0x100000000, - new: 0x100000000, - next: 0x100000000, - }, - { - name: "Successful compare-and-swap with prev != new", - prev: 0x200000000, - old: 0x200000000, - new: 0x200000002, - next: 0x200000002, - }, - { - name: "Failed compare-and-swap with prev == new", - prev: 0x300000001, - old: 0x300000000, - new: 0x300000001, - next: 0x300000001, - }, - { - name: "Failed compare-and-swap with prev != new", - prev: 0x400000001, - old: 0x400000000, - new: 0x400000002, - next: 0x400000001, - }, - } - for _, test := range tests { - val := test.prev - prev := CompareAndSwapUint64(&val, test.old, test.new) - if got, want := prev, test.prev; got != want { - t.Errorf("%s: incorrect returned previous value: got %d, expected %d", test.name, got, want) - } - if got, want := val, test.next; got != want { - t.Errorf("%s: incorrect value stored in val: got %d, expected %d", test.name, got, want) - } - } -} |