1 files changed, 44 insertions, 0 deletions
diff --git a/misc/cgo/test/cthread.go b/misc/cgo/test/cthread.go
new file mode 100644
index 000000000..d918d033f
--- /dev/null
+++ b/misc/cgo/test/cthread.go
@@ -0,0 +1,44 @@
+// Copyright 2013 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.
+
+package cgotest
+
+// extern void doAdd(int, int);
+import "C"
+
+import (
+	"runtime"
+	"sync"
+	"testing"
+)
+
+var sum struct {
+	sync.Mutex
+	i int
+}
+
+//export Add
+func Add(x int) {
+	defer func() {
+		recover()
+	}()
+	sum.Lock()
+	sum.i += x
+	sum.Unlock()
+	var p *int
+	*p = 2
+}
+
+func testCthread(t *testing.T) {
+	if runtime.GOARCH == "arm" {
+		t.Skip("testCthread disabled on arm")
+	}
+
+	C.doAdd(10, 6)
+
+	want := 10 * (10 - 1) / 2 * 6
+	if sum.i != want {
+		t.Fatalf("sum=%d, want %d", sum.i, want)
+	}
+}