--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/vmTestbase/vm/compiler/coverage/parentheses/share/HotspotInstructionsExecutor.java	Fri Jun 01 15:48:55 2018 -0700
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2012, 2018, 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 vm.compiler.coverage.parentheses.share;
+
+import java.lang.reflect.Field;
+import jdk.internal.org.objectweb.asm.ClassWriter;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.misc.Unsafe;
+
+import static jdk.internal.org.objectweb.asm.Opcodes.*;
+
+
+import java.lang.reflect.Method;
+import java.util.List;
+
+/**
+ * This class convert instructions sequence to java class file, load it to same JVM and then execute.
+ * This class uses Unsafe.defineAnonymousClass for class loading
+ */
+public class HotspotInstructionsExecutor implements InstructionsExecutor {
+
+    private static final Object[] NO_CP_PATCHES = new Object[0];
+
+    private int stackSize;
+
+    public HotspotInstructionsExecutor(int stackSize) {
+        this.stackSize = stackSize;
+    }
+
+    @Override
+    public int execute(List<Instruction> instructions) throws ReflectiveOperationException {
+        Class execClass = generateClass(instructions);
+        Method execMethod = execClass.getMethod("exec");
+        return (Integer) execMethod.invoke(null);
+    }
+
+    private Class generateClass(List<Instruction> instructions) throws ClassNotFoundException {
+        String classNameForASM = "ExecClass";
+
+        ClassWriter cw = new ClassWriter(0);
+        cw.visit(V1_1, ACC_PUBLIC, classNameForASM, null, "java/lang/Object", null);
+
+        // creates a MethodWriter for the 'main' method
+        MethodVisitor mw = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "exec", "()I", null, null);
+
+        for (Instruction instruction : instructions) {
+            mw.visitInsn(instruction.opCode);
+        }
+
+        mw.visitInsn(IRETURN);
+        mw.visitMaxs(stackSize, 2);
+        mw.visitEnd();
+
+        return getUnsafe().defineAnonymousClass(ClassWriter.class, cw.toByteArray(), NO_CP_PATCHES);
+    }
+
+    private static Unsafe getUnsafe() {
+        return Unsafe.getUnsafe();
+    }
+}