--- /dev/null	2019-04-28 23:40:15.476210066 -0700
+++ new/test/hotspot/jtreg/compiler/jvmci/jdk.vm.ci.hotspot.test/src/jdk/vm/ci/hotspot/test/TestHotSpotJVMCIRuntime.java	2019-05-04 16:23:44.412629462 -0700
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2018, 2019, 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 jdk.vm.ci.hotspot.test;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.function.Predicate;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import jdk.vm.ci.hotspot.HotSpotJVMCIRuntime;
+import jdk.vm.ci.meta.MetaAccessProvider;
+import jdk.vm.ci.meta.ResolvedJavaType;
+
+public class TestHotSpotJVMCIRuntime {
+
+    @Test
+    public void writeDebugOutputTest() {
+        HotSpotJVMCIRuntime runtime = HotSpotJVMCIRuntime.runtime();
+
+        expectWriteDebugOutputFailure(runtime, null, 0, 0, true, true, NullPointerException.class);
+        expectWriteDebugOutputFailure(runtime, null, 0, 0, true, false, -1);
+
+        byte[] emptyOutput = {};
+        byte[] nonEmptyOutput = String.format("non-empty output%n").getBytes();
+
+        for (boolean canThrow : new boolean[]{true, false}) {
+            for (byte[] output : new byte[][]{emptyOutput, nonEmptyOutput}) {
+                for (int offset = 0; offset < output.length; offset++) {
+                    int length = output.length - offset;
+                    runtime.writeDebugOutput(output, offset, length, true, canThrow);
+                }
+
+                Object expect = canThrow ? IndexOutOfBoundsException.class : -2;
+                expectWriteDebugOutputFailure(runtime, output, output.length + 1, 0, true, canThrow, expect);
+                expectWriteDebugOutputFailure(runtime, output, 0, output.length + 1, true, canThrow, expect);
+                expectWriteDebugOutputFailure(runtime, output, -1, 0, true, canThrow, expect);
+                expectWriteDebugOutputFailure(runtime, output, 0, -1, true, canThrow, expect);
+            }
+        }
+    }
+
+    private static void expectWriteDebugOutputFailure(HotSpotJVMCIRuntime runtime, byte[] bytes, int offset, int length, boolean flush, boolean canThrow, Object expect) {
+        try {
+            int result = runtime.writeDebugOutput(bytes, offset, length, flush, canThrow);
+            if (expect instanceof Integer) {
+                Assert.assertEquals((int) expect, result);
+            } else {
+                Assert.fail("expected " + expect + ", got " + result + " for bytes == " + Arrays.toString(bytes));
+            }
+        } catch (Exception e) {
+            if (expect instanceof Integer) {
+                Assert.fail("expected " + expect + ", got " + e + " for bytes == " + Arrays.toString(bytes));
+            } else {
+                Assert.assertTrue(e.toString(), ((Class<?>) expect).isInstance(e));
+            }
+        }
+    }
+
+    @Test
+    public void getIntrinsificationTrustPredicateTest() throws Exception {
+        HotSpotJVMCIRuntime runtime = HotSpotJVMCIRuntime.runtime();
+        MetaAccessProvider metaAccess = runtime.getHostJVMCIBackend().getMetaAccess();
+        Predicate<ResolvedJavaType> predicate = runtime.getIntrinsificationTrustPredicate(HotSpotJVMCIRuntime.class);
+        List<Class<?>> classes = new ArrayList<>(Arrays.asList(
+                        Object.class,
+                        String.class,
+                        Class.class,
+                        HotSpotJVMCIRuntime.class,
+                        VirtualObjectLayoutTest.class,
+                        TestHotSpotJVMCIRuntime.class));
+        try {
+            classes.add(Class.forName("com.sun.crypto.provider.AESCrypt"));
+            classes.add(Class.forName("com.sun.crypto.provider.CipherBlockChaining"));
+        } catch (ClassNotFoundException e) {
+            // Extension classes not available
+        }
+        ClassLoader jvmciLoader = HotSpotJVMCIRuntime.class.getClassLoader();
+        ClassLoader extLoader = getExtensionLoader();
+        for (Class<?> c : classes) {
+            ClassLoader cl = c.getClassLoader();
+            boolean expected = cl == null || cl == jvmciLoader || cl == extLoader;
+            boolean actual = predicate.test(metaAccess.lookupJavaType(c));
+            Assert.assertEquals(c + ": cl=" + cl, expected, actual);
+        }
+    }
+
+    private static ClassLoader getExtensionLoader() throws Exception {
+        Object launcher = Class.forName("sun.misc.Launcher").getMethod("getLauncher").invoke(null);
+        ClassLoader appLoader = (ClassLoader) launcher.getClass().getMethod("getClassLoader").invoke(launcher);
+        ClassLoader extLoader = appLoader.getParent();
+        assert extLoader.getClass().getName().equals("sun.misc.Launcher$ExtClassLoader") : extLoader;
+        return extLoader;
+    }
+}