/*

 * Copyright (c) 2015, 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

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 */

/**

 * @test

 * @bug 8136421

 * @requires vm.jvmci

 * @library /test/lib /

 * @library ../common/patches

 * @modules java.base/jdk.internal.misc

 * @modules java.base/jdk.internal.org.objectweb.asm

 *          java.base/jdk.internal.org.objectweb.asm.tree

 * @clean compiler.jvmci.compilerToVM.*

 * @compile -g DummyInterface.java

 * @compile -g DummyAbstractClass.java

 * @compile -g DummyClass.java

 * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI

 *                   compiler.jvmci.compilerToVM.GetLocalVariableTableTest

 * @clean compiler.jvmci.compilerToVM.*

 */

package compiler.jvmci.compilerToVM;

import compiler.jvmci.common.CTVMUtilities;

import jdk.test.lib.Asserts;

import jdk.vm.ci.hotspot.CompilerToVMHelper;

import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod;

import java.lang.reflect.Executable;

import java.util.HashMap;

import java.util.Map;

public class GetLocalVariableTableTest {

    public static final int MAIN_LOCALS_COUNT = 0;

    public static final int INSTANCE_LOCALS_COUNT = 4;

    public static final int EMPTY_INSTANCE_COUNT = 1;

    public static final int EMPTY_STATIC_COUNT = 0;

    public static final int ABSTRACT_INHERIT_LOCALS_COUNT = 2;

    public static final int DEFAULTFUNC_LOCALS_COUNT = 4;

    public static void main(String[] args) {

        Map<Executable, Integer> testCases = createTestCases();

        testCases.forEach(GetLocalVariableTableTest::runSanityTest);

    }

    private static Map<Executable, Integer> createTestCases() {

        HashMap<Executable, Integer> methods = new HashMap<>();

        try {

            Class<?> aClass;

            aClass = GetLocalVariableTableTest.class;

            methods.put(aClass.getDeclaredMethod("main", String[].class),

                    MAIN_LOCALS_COUNT);

            aClass = DummyClass.class;

            methods.put(aClass.getMethod("dummyInstanceFunction"),

                    INSTANCE_LOCALS_COUNT);

            methods.put(aClass.getMethod("dummyEmptyInstanceFunction"),

                    EMPTY_INSTANCE_COUNT);

            methods.put(aClass.getMethod("dummyEmptyStaticFunction"),

                    EMPTY_STATIC_COUNT);

            methods.put(aClass.getMethod("dummyFunction"),

                    EMPTY_INSTANCE_COUNT);

            methods.put(aClass.getMethod("dummyAbstractFunction"),

                    ABSTRACT_INHERIT_LOCALS_COUNT);

            aClass = DummyInterface.class;

            methods.put(aClass.getMethod("dummyFunction"), EMPTY_STATIC_COUNT);

            methods.put(aClass.getMethod("dummyDefaultFunction", int.class,

                    int.class), DEFAULTFUNC_LOCALS_COUNT);

            aClass = DummyAbstractClass.class;

            methods.put(aClass.getMethod("dummyAbstractFunction"), 0);

        } catch (NoSuchMethodException e) {

            throw new Error("TEST BUG", e);

        }

        return methods;

    }

    private static void runSanityTest(Executable aMethod,

                                      Integer expectedTableLength) {

        HotSpotResolvedJavaMethod method = CTVMUtilities

                .getResolvedMethod(aMethod);

        int tblLength = CompilerToVMHelper.getLocalVariableTableLength(method);

        Asserts.assertEQ(tblLength, expectedTableLength, aMethod + " : incorrect "

                + "local variable table length.");

        long tblStart = CompilerToVMHelper.getLocalVariableTableStart(method);

        if (tblLength > 0) {

            Asserts.assertNE(tblStart, 0L, aMethod + " : local variable table starts"

                    + " at 0 with length " + tblLength);

        }

    }

}