Check in gVisor.

PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463

1 files changed, 32 insertions, 0 deletions

diff --git a/pkg/log/glog_unsafe.go b/pkg/log/glog_unsafe.go
new file mode 100644
index 000000000..c320190b8
--- /dev/null
+++ b/pkg/log/glog_unsafe.go
@@ -0,0 +1,32 @@
+// 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 log
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+// unsafeString returns a string that points to the given byte array.
+// The byte array must be preserved until the string is disposed.
+func unsafeString(data []byte) (s string) {
+	if len(data) == 0 {
+		return
+	}
+
+	(*reflect.StringHeader)(unsafe.Pointer(&s)).Data = uintptr(unsafe.Pointer(&data[0]))
+	(*reflect.StringHeader)(unsafe.Pointer(&s)).Len = len(data)
+	return
+}