8078112: [TESTBUG] Integrate Selection/Resolution test suite into jtreg tests

Reviewed-by: ctornqvi, acorn

hotspot/test/runtime/SelectionResolution/classes/selectionresolution/ByteCodeClassLoader.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2016, 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.
+ *
+ */
+
+package selectionresolution;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+
+
+public class ByteCodeClassLoader extends ClassLoader {
+    ArrayList<ClassConstruct> classes = new ArrayList<>();
+    HashMap<String, Class> loadedClasses = new HashMap<>();
+
+    public void addClasses(ClassConstruct... classes) {
+        this.classes.addAll(Arrays.asList(classes));
+    }
+
+    public void loadAll() throws ClassNotFoundException {
+        for (ClassConstruct clazz : classes) {
+            findClass(clazz.getDottedName());
+        }
+    }
+
+
+    @Override
+    public Class findClass(String name) throws ClassNotFoundException {
+
+        Class cls = loadedClasses.get(name);
+
+        if (cls != null) {
+            return cls;
+        }
+
+        for (ClassConstruct clazz : classes) {
+            if (clazz.getDottedName().equals(name)) {
+                return load(clazz);
+            }
+        }
+
+        throw new ClassNotFoundException(name);
+    }
+
+    @Override
+    public Class loadClass(String name) throws ClassNotFoundException {
+        try {
+            return findClass(name);
+        } catch (ClassNotFoundException e) {
+            return super.loadClass(name);
+        }
+    }
+
+    private Class load(ClassConstruct clazz) {
+        byte[] bytecode = clazz.generateBytes();
+        Class loadedClass = defineClass(clazz.getDottedName(), bytecode, 0, bytecode.length);
+        loadedClasses.put(clazz.getDottedName(), loadedClass);
+        return loadedClass;
+    }
+}