1 files changed, 33 insertions, 0 deletions
diff --git a/test-luawrapper.cc b/test-luawrapper.cc
new file mode 100644
index 0000000..1004790
--- /dev/null
+++ b/test-luawrapper.cc
@@ -0,0 +1,33 @@
+#define BOOST_TEST_DYN_LINK
+#define BOOST_TEST_NO_MAIN
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <boost/test/unit_test.hpp>
+#include "ext/luawrapper/include/LuaContext.hpp"
+
+BOOST_AUTO_TEST_SUITE(test_lua_lightuserdata)
+
+BOOST_AUTO_TEST_CASE(test_registerFunction)
+{
+  // This test comes from luawrapper/tests/custom_types.cc, TEST(CustomTypes, MemberFunctions).
+  // In some versions of luajit, as shipped by Debian Buster and others, Lua lightuserdata
+  // objects can only hold 47 bits of the address of a pointer. If the kernel puts our heap
+  // above that 47 bit limit, this test crashes. Many arm64 Linux kernels are known to put
+  // the heap in that problematic area.
+  struct Object
+  {
+    void increment() { ++value; }
+    int value;
+  };
+
+  LuaContext context;
+  context.registerFunction("increment", &Object::increment);
+
+  context.writeVariable("obj", Object{10});
+  context.executeCode("obj:increment()");
+
+  BOOST_CHECK_EQUAL(11, context.readVariable<Object>("obj").value);
+}
+
+BOOST_AUTO_TEST_SUITE_END()