2 files changed, 109 insertions, 0 deletions
diff --git a/tools/go_marshal/test/escape/BUILD b/tools/go_marshal/test/escape/BUILD
new file mode 100644
index 000000000..f74e6ffae
--- /dev/null
+++ b/tools/go_marshal/test/escape/BUILD
@@ -0,0 +1,14 @@
+load("//tools:defs.bzl", "go_library")
+
+licenses(["notice"])
+
+go_library(
+    name = "escape",
+    testonly = 1,
+    srcs = ["escape.go"],
+    deps = [
+        "//pkg/usermem",
+        "//tools/go_marshal/marshal",
+        "//tools/go_marshal/test",
+    ],
+)
diff --git a/tools/go_marshal/test/escape/escape.go b/tools/go_marshal/test/escape/escape.go
new file mode 100644
index 000000000..6a46ddbf8
--- /dev/null
+++ b/tools/go_marshal/test/escape/escape.go
@@ -0,0 +1,95 @@
+// Copyright 2020 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 escape
+
+import (
+	"gvisor.dev/gvisor/pkg/usermem"
+	"gvisor.dev/gvisor/tools/go_marshal/marshal"
+	"gvisor.dev/gvisor/tools/go_marshal/test"
+)
+
+// dummyTask implements marshal.Task.
+type dummyTask struct {
+}
+
+func (*dummyTask) CopyScratchBuffer(size int) []byte {
+	return make([]byte, size)
+}
+
+func (*dummyTask) CopyOutBytes(addr usermem.Addr, b []byte) (int, error) {
+	return len(b), nil
+}
+
+func (*dummyTask) CopyInBytes(addr usermem.Addr, b []byte) (int, error) {
+	return len(b), nil
+}
+
+func (t *dummyTask) MarshalBytes(addr usermem.Addr, marshallable marshal.Marshallable) {
+	buf := t.CopyScratchBuffer(marshallable.SizeBytes())
+	marshallable.MarshalBytes(buf)
+	t.CopyOutBytes(addr, buf)
+}
+
+func (t *dummyTask) MarshalUnsafe(addr usermem.Addr, marshallable marshal.Marshallable) {
+	buf := t.CopyScratchBuffer(marshallable.SizeBytes())
+	marshallable.MarshalUnsafe(buf)
+	t.CopyOutBytes(addr, buf)
+}
+
+// +checkescape:all
+//go:nosplit
+func doCopyIn(t *dummyTask) {
+	var stat test.Stat
+	stat.CopyIn(t, usermem.Addr(0xf000ba12))
+}
+
+// +checkescape:all
+//go:nosplit
+func doCopyOut(t *dummyTask) {
+	var stat test.Stat
+	stat.CopyOut(t, usermem.Addr(0xf000ba12))
+}
+
+// +mustescape:builtin
+// +mustescape:stack
+func doMarshalBytesDirect(t *dummyTask) {
+	var stat test.Stat
+	buf := t.CopyScratchBuffer(stat.SizeBytes())
+	stat.MarshalBytes(buf)
+	t.CopyOutBytes(usermem.Addr(0xf000ba12), buf)
+}
+
+// +mustescape:builtin
+// +mustescape:stack
+func doMarshalUnsafeDirect(t *dummyTask) {
+	var stat test.Stat
+	buf := t.CopyScratchBuffer(stat.SizeBytes())
+	stat.MarshalUnsafe(buf)
+	t.CopyOutBytes(usermem.Addr(0xf000ba12), buf)
+}
+
+// +mustescape:local,heap
+// +mustescape:stack
+func doMarshalBytesViaMarshallable(t *dummyTask) {
+	var stat test.Stat
+	t.MarshalBytes(usermem.Addr(0xf000ba12), &stat)
+}
+
+// +mustescape:local,heap
+// +mustescape:stack
+func doMarshalUnsafeViaMarshallable(t *dummyTask) {
+	var stat test.Stat
+	t.MarshalUnsafe(usermem.Addr(0xf000ba12), &stat)
+}