/*

 * 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/**

 * @test

 * @bug 8136421

 * @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

 *          jdk.vm.ci/jdk.vm.ci.hotspot

 *          jdk.vm.ci/jdk.vm.ci.code

 * @build jdk.vm.ci/jdk.vm.ci.hotspot.CompilerToVMHelper

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

 *                   compiler.jvmci.compilerToVM.GetExceptionTableTest

 */

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.io.IOException;

import java.lang.reflect.Executable;

import java.net.Socket;

import java.util.HashMap;

import java.util.Map;

public class GetExceptionTableTest {

    public static final int TRY_CATCH_COUNT = 3;

    public static final int TRY_CATCH_FINALLY_COUNT = 8;

    public static final int TRY_WITH_RESOURCES_COUNT = 6;

    public static final int EMPTY_COUNT = 0;

    public static void main(String[] args) {

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

        testCases.forEach(GetExceptionTableTest::runSanityTest);

    }

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

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

        try {

            Class<?> aClass = GetExceptionTableTest.DummyClass.class;

            methods.put(aClass.getMethod("tryCatchDummy"), TRY_CATCH_COUNT);

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

                    TRY_CATCH_FINALLY_COUNT);

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

                    TRY_WITH_RESOURCES_COUNT);

            methods.put(aClass.getMethod("emptyFunction"), EMPTY_COUNT);

        } 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 tableLength = CompilerToVMHelper.getExceptionTableLength(method);

        Asserts.assertEQ(tableLength, expectedTableLength, aMethod

                + " incorrect exception table length.");

        long tableStart = CompilerToVMHelper.getExceptionTableStart(method);

        if (tableLength > 0) {

            Asserts.assertNE(tableStart, 0L, aMethod + " exception table starts "

                    + "at 0.");

        }

    }

    private static class DummyClass {

        public static void emptyFunction() {}

        public static void tryCatchDummy() throws Throwable {

            try {

                throw new Exception("Dummy exception");

            } catch (ArithmeticException ex) {

                throw new IOException(ex.getMessage());

            } catch (IOException ex) {

                throw new Exception(ex);

            } catch (Exception ex) {

                throw new Exception(ex);

            }

        }

        public int tryCatchFinallyDummy() {

            // 4 times catch/finally = 8 catch-blocks and finally-blocks

            try {

                throw new Exception("Dummy exception");

            } catch (IndexOutOfBoundsException ex) {

                return 1;

            } catch (ArithmeticException ex) {

                return 2;

            } catch (IOException ex) {

                return 3;

            } catch (Exception ex) {

                return 4;

            } finally {

                return 0;

            }

        }

        public static int tryWithResourcesDummy() throws Throwable {

            try (Socket socket = new Socket()) {

                throw new Exception("Dummy exception");

            } catch (ArithmeticException ex) {

                return 1;

            } catch (IOException ex) {

                return 2;

            } catch (Exception ex) {

                return 3;

            }

        }

    }

}