1 files changed, 25 insertions, 0 deletions
diff --git a/misc/cgo/test/callback_c.c b/misc/cgo/test/callback_c.c
index 5983a5e11..47f07301b 100644
--- a/misc/cgo/test/callback_c.c
+++ b/misc/cgo/test/callback_c.c
@@ -8,5 +8,30 @@
 void
 callback(void *f)
 {
+	// use some stack space
+	volatile char data[64*1024];
+
+	data[0] = 0;
 	goCallback(f);
+        data[sizeof(data)-1] = 0;
+}
+
+void
+callGoFoo(void)
+{
+	extern void goFoo(void);
+	goFoo();
+}
+
+void
+IntoC(void)
+{
+	BackIntoGo();
+}
+
+void
+twoSleep(int n)
+{
+	BackgroundSleep(n);
+	sleep(n);
 }