--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgo/misc/cgo/test/issue10303.go	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,76 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Issue 10303. Pointers passed to C were not marked as escaping (bug in cgo).
+
+package cgotest
+
+import "runtime"
+
+/*
+typedef int *intptr;
+
+void setintstar(int *x) {
+	*x = 1;
+}
+
+void setintptr(intptr x) {
+	*x = 1;
+}
+
+void setvoidptr(void *x) {
+	*(int*)x = 1;
+}
+
+typedef struct Struct Struct;
+struct Struct {
+	int *P;
+};
+
+void setstruct(Struct s) {
+	*s.P = 1;
+}
+
+*/
+import "C"
+
+import (
+	"testing"
+	"unsafe"
+)
+
+func test10303(t *testing.T, n int) {
+	if runtime.Compiler == "gccgo" {
+		t.Skip("gccgo permits C pointers on the stack")
+	}
+
+	// Run at a few different stack depths just to avoid an unlucky pass
+	// due to variables ending up on different pages.
+	if n > 0 {
+		test10303(t, n-1)
+	}
+	if t.Failed() {
+		return
+	}
+	var x, y, z, v, si C.int
+	var s C.Struct
+	C.setintstar(&x)
+	C.setintptr(&y)
+	C.setvoidptr(unsafe.Pointer(&v))
+	s.P = &si
+	C.setstruct(s)
+
+	if uintptr(unsafe.Pointer(&x))&^0xfff == uintptr(unsafe.Pointer(&z))&^0xfff {
+		t.Error("C int* argument on stack")
+	}
+	if uintptr(unsafe.Pointer(&y))&^0xfff == uintptr(unsafe.Pointer(&z))&^0xfff {
+		t.Error("C intptr argument on stack")
+	}
+	if uintptr(unsafe.Pointer(&v))&^0xfff == uintptr(unsafe.Pointer(&z))&^0xfff {
+		t.Error("C void* argument on stack")
+	}
+	if uintptr(unsafe.Pointer(&si))&^0xfff == uintptr(unsafe.Pointer(&z))&^0xfff {
+		t.Error("C struct field pointer on stack")
+	}
+}