Check in gVisor.

PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463

1 files changed, 29 insertions, 0 deletions

diff --git a/vdso/compiler.h b/vdso/compiler.h
new file mode 100644
index 000000000..a661516c3
--- /dev/null
+++ b/vdso/compiler.h
@@ -0,0 +1,29 @@
+// 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.
+
+#ifndef VDSO_COMPILER_H_
+#define VDSO_COMPILER_H_
+
+#define likely(x) __builtin_expect(!!(x), 1)
+#define unlikely(x) __builtin_expect(!!(x), 0)
+
+#ifndef __section
+#define __section(S) __attribute__((__section__(#S)))
+#endif
+
+#ifndef __aligned
+#define __aligned(N) __attribute__((__aligned__(N)))
+#endif
+
+#endif  // VDSO_COMPILER_H_