8240538: [JVMCI] add test for JVMCI ConstantPool class

Reviewed-by: kvn, iignatyev

test/hotspot/jtreg/compiler/jvmci/jdk.vm.ci.runtime.test/src/jdk/vm/ci/runtime/test/ConstantPoolTest.java

@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2020, 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
+ * @requires vm.jvmci
+ * @modules jdk.internal.vm.ci/jdk.vm.ci.hotspot:open
+ *          jdk.internal.vm.ci/jdk.vm.ci.runtime
+ *          jdk.internal.vm.ci/jdk.vm.ci.meta
+ *          jdk.internal.vm.ci/jdk.vm.ci.code
+ *          jdk.internal.vm.ci/jdk.vm.ci.common
+ * @library /compiler/jvmci/jdk.vm.ci.hotspot.test/src
+ *          /compiler/jvmci/jdk.vm.ci.code.test/src
+ * @run testng/othervm
+ *      -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI -XX:-UseJVMCICompiler
+ *      jdk.vm.ci.runtime.test.ConstantPoolTest
+ */
+package jdk.vm.ci.runtime.test;
+
+import org.testng.Assert;
+import org.testng.annotations.Test;
+
+import jdk.vm.ci.meta.JavaMethod;
+import jdk.vm.ci.meta.MetaAccessProvider;
+import jdk.vm.ci.meta.ResolvedJavaMethod;
+import jdk.vm.ci.meta.ResolvedJavaType;
+import jdk.vm.ci.runtime.JVMCI;
+
+public class ConstantPoolTest {
+
+    static Object cloneByteArray(byte[] arr) {
+        return arr.clone();
+    }
+
+    static Object cloneCharArray(char[] arr) {
+        return arr.clone();
+    }
+
+    static Object cloneShortArray(short[] arr) {
+        return arr.clone();
+    }
+
+    static Object cloneIntArray(int[] arr) {
+        return arr.clone();
+    }
+
+    static Object cloneFloatArray(float[] arr) {
+        return arr.clone();
+    }
+
+    static Object cloneLongArray(long[] arr) {
+        return arr.clone();
+    }
+
+    static Object cloneDoubleArray(double[] arr) {
+        return arr.clone();
+    }
+
+    static Object cloneObjectArray(Object[] arr) {
+        return arr.clone();
+    }
+
+    public static final int ALOAD_0 = 42; // 0x2A
+    public static final int INVOKEVIRTUAL = 182; // 0xB6
+
+    public static int beU2(byte[] data, int bci) {
+        return ((data[bci] & 0xff) << 8) | (data[bci + 1] & 0xff);
+    }
+
+    public static int beU1(byte[] data, int bci) {
+        return data[bci] & 0xff;
+    }
+
+    @Test
+    public void lookupArrayCloneMethodTest() throws Exception {
+        MetaAccessProvider metaAccess = JVMCI.getRuntime().getHostJVMCIBackend().getMetaAccess();
+        ResolvedJavaType type = metaAccess.lookupJavaType(ConstantPoolTest.class);
+        for (ResolvedJavaMethod m : type.getDeclaredMethods()) {
+            if (m.getName().startsWith("clone")) {
+                byte[] bytecode = m.getCode();
+                Assert.assertNotNull(bytecode, m.toString());
+                Assert.assertEquals(5, bytecode.length, m.toString());
+                Assert.assertEquals(ALOAD_0, beU1(bytecode, 0), m.toString());
+                Assert.assertEquals(INVOKEVIRTUAL, beU1(bytecode, 1), m.toString());
+                int cpi = beU2(bytecode, 2);
+                JavaMethod callee = m.getConstantPool().lookupMethod(cpi, INVOKEVIRTUAL);
+                Assert.assertTrue(callee instanceof ResolvedJavaMethod, callee.toString());
+            }
+        }
+    }
+}