1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 8138708
  27  * @requires vm.jvmci
  28  * @library /test/lib /
  29  * @library ../common/patches
  30  * @modules java.base/jdk.internal.misc
  31  *          java.base/jdk.internal.reflect
  32  *          java.base/jdk.internal.org.objectweb.asm
  33  *          java.base/jdk.internal.org.objectweb.asm.tree
  34  *          jdk.internal.vm.ci/jdk.vm.ci.hotspot
  35  *          jdk.internal.vm.ci/jdk.vm.ci.runtime
  36  *          jdk.internal.vm.ci/jdk.vm.ci.meta
  37  *
  38  * @build jdk.internal.vm.ci/jdk.vm.ci.hotspot.CompilerToVMHelper sun.hotspot.WhiteBox
  39  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  40  *                                sun.hotspot.WhiteBox$WhiteBoxPermission
  41  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  42  *                   -XX:+WhiteBoxAPI -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI
  43  *                   -Djvmci.Compiler=null
  44  *                   compiler.jvmci.compilerToVM.ResolvePossiblyCachedConstantInPoolTest
  45  */
  46 
  47 package compiler.jvmci.compilerToVM;
  48 
  49 import compiler.jvmci.compilerToVM.ConstantPoolTestCase.ConstantTypes;
  50 import compiler.jvmci.compilerToVM.ConstantPoolTestCase.TestedCPEntry;
  51 import compiler.jvmci.compilerToVM.ConstantPoolTestCase.Validator;
  52 import compiler.jvmci.compilerToVM.ConstantPoolTestsHelper.DummyClasses;
  53 import jdk.test.lib.Asserts;
  54 import jdk.vm.ci.hotspot.CompilerToVMHelper;
  55 import jdk.vm.ci.meta.ConstantPool;
  56 
  57 import java.util.HashMap;
  58 import java.util.Map;
  59 
  60 import static compiler.jvmci.compilerToVM.ConstantPoolTestCase.ConstantTypes.CONSTANT_STRING;
  61 
  62 /**
  63  * Test for {@code jdk.vm.ci.hotspot.CompilerToVM.resolvePossiblyCachedConstantInPool} method
  64  */
  65 public class ResolvePossiblyCachedConstantInPoolTest {
  66 
  67     public static void main(String[] args) throws Exception {
  68         Map<ConstantTypes, Validator> typeTests = new HashMap<>();
  69         typeTests.put(CONSTANT_STRING, ResolvePossiblyCachedConstantInPoolTest::validateString);
  70         ConstantPoolTestCase testCase = new ConstantPoolTestCase(typeTests);
  71         // The next "Class.forName" is here for the following reason.
  72         // When class is initialized, constant pool cache is available.
  73         // This method works only with cached constant pool.
  74         for (DummyClasses dummy : DummyClasses.values()) {
  75             Class.forName(dummy.klass.getName());
  76         }
  77         testCase.test();
  78     }
  79 
  80     private static void validateString(ConstantPool constantPoolCTVM,
  81                                        ConstantTypes cpType,
  82                                        DummyClasses dummyClass,
  83                                        int cpi) {
  84         TestedCPEntry entry = cpType.getTestedCPEntry(dummyClass, cpi);
  85         if (entry == null) {
  86             return;
  87         }
  88         int index = cpi;
  89         String cached = "";
  90         int cpci = dummyClass.getCPCacheIndex(cpi);
  91         if (cpci != ConstantPoolTestsHelper.NO_CP_CACHE_PRESENT) {
  92             index = cpci;
  93             cached = "cached ";
  94         }
  95         Object constantInPool = CompilerToVMHelper.resolvePossiblyCachedConstantInPool(constantPoolCTVM, index);
  96         String stringToVerify = (String) constantInPool;
  97         String stringToRefer = entry.name;
  98         if (stringToRefer.equals("") && cpci != ConstantPoolTestsHelper.NO_CP_CACHE_PRESENT) {
  99             stringToRefer = null; // tested method returns null for cached empty strings
 100         }
 101         String msg = String.format("Wrong string accessed by %sconstant pool index %d", cached, index);
 102         Asserts.assertEQ(stringToRefer, stringToVerify, msg);
 103     }
 104 }
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