/*

 * Copyright (c) 2016, 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 8138708

 * @requires (os.simpleArch == "x64" | os.simpleArch == "sparcv9" | os.simpleArch == "aarch64")

 * @library /testlibrary /test/lib /

 * @build sun.hotspot.WhiteBox

 *        compiler.jvmci.compilerToVM.ResolveFieldInPoolTest

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 *                              sun.hotspot.WhiteBox$WhiteBoxPermission

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions

 *                   -XX:+WhiteBoxAPI -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI

 *                   compiler.jvmci.compilerToVM.ResolveFieldInPoolTest

 */

package compiler.jvmci.compilerToVM;

import compiler.jvmci.compilerToVM.ConstantPoolTestsHelper.DummyClasses;

import compiler.jvmci.compilerToVM.ConstantPoolTestCase.ConstantTypes;

import static compiler.jvmci.compilerToVM.ConstantPoolTestCase.ConstantTypes.*;

import compiler.jvmci.compilerToVM.ConstantPoolTestCase.TestedCPEntry;

import compiler.jvmci.compilerToVM.ConstantPoolTestCase.Validator;

import java.lang.reflect.Field;

import java.util.HashMap;

import java.util.Map;

import jdk.internal.org.objectweb.asm.Opcodes;

import jdk.vm.ci.hotspot.CompilerToVMHelper;

import jdk.vm.ci.hotspot.HotSpotResolvedObjectType;

import jdk.vm.ci.meta.ConstantPool;

import jdk.test.lib.Asserts;

import jdk.test.lib.Utils;

import sun.misc.Unsafe;

/**

 * Test for {@code jdk.vm.ci.hotspot.CompilerToVM.resolveFieldInPool} method

 */

public class ResolveFieldInPoolTest {

    private static final Unsafe UNSAFE = Utils.getUnsafe();

    public static void main(String[] args) throws Exception {

        Map<ConstantTypes, Validator> typeTests = new HashMap<>();

        typeTests.put(CONSTANT_FIELDREF, ResolveFieldInPoolTest::validate);

        ConstantPoolTestCase testCase = new ConstantPoolTestCase(typeTests);

        testCase.test();

        // The next "Class.forName" and repeating "testCase.test()"

        // are here for the following reason.

        // The first test run is without dummy class initialization,

        // which means no constant pool cache exists.

        // The second run is with initialized class (with constant pool cache available).

        // Some CompilerToVM methods require different input

        // depending on whether CP cache exists or not.

        for (DummyClasses dummy : DummyClasses.values()) {

            Class.forName(dummy.klass.getName());

        }

        testCase.test();

    }

    private static void validate(ConstantPool constantPoolCTVM,

                                 ConstantTypes cpType,

                                 DummyClasses dummyClass,

                                 int cpi) {

        TestedCPEntry entry = cpType.getTestedCPEntry(dummyClass, cpi);

        if (entry == null) {

            return;

        }

        int index = cpi;

        String cached = "";

        int cpci = dummyClass.getCPCacheIndex(cpi);

        if (cpci != ConstantPoolTestsHelper.NO_CP_CACHE_PRESENT) {

            index = cpci;

            cached = "cached ";

        }

        for (int j = 0; j < entry.opcodes.length; j++) {

            long[] info = new long[2];

            HotSpotResolvedObjectType fieldToVerify

                    = CompilerToVMHelper.resolveFieldInPool(constantPoolCTVM,

                                                           index,

                                                           entry.opcodes[j],

                                                           info);

            String msg = String.format("Object returned by resolveFieldInPool method"

                                               + " for %sindex %d  should not be null",

                                       cached,

                                       index);

            Asserts.assertNotNull(fieldToVerify, msg);

            String classNameToRefer = entry.klass;

            String fieldToVerifyKlassToString = fieldToVerify.klass().toValueString();

            if (!fieldToVerifyKlassToString.contains(classNameToRefer)) {

                msg = String.format("String representation \"%s\" of the object"

                                            + " returned by resolveFieldInPool method"

                                            + " for index %d does not contain a field's class name,"

                                            + " should contain %s",

                                    fieldToVerifyKlassToString,

                                    index,

                                    classNameToRefer);

                throw new AssertionError(msg);

            }

            msg = String.format("Access flags returned by resolveFieldInPool"

                                        + " method are wrong for the field %s.%s"

                                        + " at %sindex %d",

                                entry.klass,

                                entry.name,

                                cached,

                                index);

            Asserts.assertEQ(info[0], entry.accFlags, msg);

            if (cpci == -1) {

                return;

            }

            Class classOfTheField = null;

            Field fieldToRefer = null;

            try {

                classOfTheField = Class.forName(classNameToRefer.replaceAll("/", "\\."));

                fieldToRefer = classOfTheField.getDeclaredField(entry.name);

                fieldToRefer.setAccessible(true);

            } catch (Exception ex) {

                throw new Error("Unexpected exception", ex);

            }

            long offsetToRefer;

            if ((entry.accFlags & Opcodes.ACC_STATIC) != 0) {

                offsetToRefer = UNSAFE.staticFieldOffset(fieldToRefer);

            } else {

                offsetToRefer = UNSAFE.objectFieldOffset(fieldToRefer);

            }

            msg = String.format("Field offset returned by resolveFieldInPool"

                                        + " method is wrong for the field %s.%s"

                                        + " at %sindex %d",

                                entry.klass,

                                entry.name,

                                cached,

                                index);

            Asserts.assertEQ(info[1], offsetToRefer, msg);

        }

    }

}