8068985: Wrong 'this' bound to eval call within a function when caller's 'this' is a Java object

Reviewed-by: jlaskey, attila

nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/Context.java

@@ -703,7 +703,7 @@ public final class Context {
         final ScriptFunction func = getProgramFunction(clazz, scope);
         Object evalThis;
         if (directEval) {
-            evalThis = callThis instanceof ScriptObject || strictFlag ? callThis : global;
+            evalThis = (callThis != UNDEFINED && callThis != null) || strictFlag ? callThis : global;
         } else {
             evalThis = global;
         }

nashorn/test/script/basic/JDK-8068985.js

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2015 Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8068985: Wrong 'this' bound to eval call within a function when caller's 'this' is a Java object
+ *
+ * @test
+ * @run
+ */
+
+function func(arg) {
+  (function() { print(eval('this')); }).call(arg);
+}
+
+// primitives
+func(undefined);
+func(null);
+func(34.23);
+func("hello");
+func(false);
+
+// script objects
+func(this);
+func({});
+func({ toString: function() { return "foo" } });
+
+// java objects
+func(new java.util.Vector());
+var m = new java.util.HashMap();
+m.put("foo", "bar");
+func(m);

nashorn/test/script/basic/JDK-8068985.js.EXPECTED

@@ -0,0 +1,10 @@
+[object global]
+[object global]
+34.23
+hello
+false
+[object global]
+[object Object]
+foo
+[]
+{foo=bar}