Add %GetCallerJSFunction intrinsic

test/mjsunit/get-caller-js-function.js

Index: test/mjsunit/get-caller-js-function.js
diff --git a/test/mjsunit/get-caller-js-function.js b/test/mjsunit/get-caller-js-function.js
new file mode 100644
index 0000000000000000000000000000000000000000..5c7af648144a9c7abe6a85e231fc09306c65d1d5
--- /dev/null
+++ b/test/mjsunit/get-caller-js-function.js
@@ -0,0 +1,21 @@
+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax --turbo-filter=* --nostress-opt
+
+// Test that for fully optimized but non inlined code, GetCallerJSFunction walks
+// up a single stack frame to get the calling function. Full optimization elides
+// the check in the runtime version of the intrinsic that would throw since the
+// caller isn't a stub. It's a bit of a hack, but allows minimal testing of the
+// intrinsic without writing a full-blown cctest.
+(function() {
+  var a = function() {
+    return %_GetCallerJSFunction();
+  };
+  var b = function() {
+    return a();
+  };
+  %OptimizeFunctionOnNextCall(a);
+  assertEquals(b, b());
+}());