--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/jvmci/compilerToVM/DisassembleCodeBlobTest.java	Thu Oct 08 12:49:30 2015 -1000
@@ -0,0 +1,82 @@
+/*
+ * 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.
+ *
+ */
+
+/*
+ * @test
+ * @bug 8136421
+ * @requires (os.simpleArch == "x64" | os.simpleArch == "sparcv9") & os.arch != "aarch64"
+ * @library /testlibrary /../../test/lib /
+ * @compile ../common/CompilerToVMHelper.java
+ * @build sun.hotspot.WhiteBox
+ *        compiler.jvmci.compilerToVM.DisassembleCodeBlobTest
+ * @run main ClassFileInstaller sun.hotspot.WhiteBox
+ *                              sun.hotspot.WhiteBox$WhiteBoxPermission
+ *                              jdk.vm.ci.hotspot.CompilerToVMHelper
+ * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI
+ *      -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *      compiler.jvmci.compilerToVM.DisassembleCodeBlobTest
+ */
+
+package compiler.jvmci.compilerToVM;
+
+import jdk.vm.ci.hotspot.CompilerToVMHelper;
+import jdk.test.lib.Asserts;
+import sun.hotspot.code.NMethod;
+
+import java.util.List;
+
+public class DisassembleCodeBlobTest {
+
+    public static void main(String[] args) {
+        DisassembleCodeBlobTest test
+                = new DisassembleCodeBlobTest();
+        List<CompileCodeTestCase> testCases
+                = CompileCodeTestCase.generate(/* bci = */ -1);
+        testCases.addAll(CompileCodeTestCase.generate(/* bci = */ 0));
+        testCases.forEach(test::check);
+        test.checkNull();
+    }
+
+    private void checkNull() {
+        String str = CompilerToVMHelper.disassembleCodeBlob(0L);
+        Asserts.assertNull(str, "not null string returned for null pointer");
+    }
+
+    private void check(CompileCodeTestCase testCase) {
+        System.out.println(testCase);
+        // to have a clean state
+        NMethod nMethod = testCase.deoptimizeAndCompile();
+        if (nMethod == null) {
+            throw new Error(testCase + " : method is not compiled");
+        }
+        String str = CompilerToVMHelper.disassembleCodeBlob(nMethod.address);
+        if (str != null) {
+            Asserts.assertGT(str.length(), 0,
+                   testCase +  " : returned string has to be non-zero length");
+        }
+        String str2 = CompilerToVMHelper.disassembleCodeBlob(nMethod.address);
+        Asserts.assertEQ(str, str2,
+                testCase + " : 2nd invocation returned different value");
+    }
+}