/*

 * Copyright (c) 2013, 2015, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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,

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 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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/*

 * @test

 * @bug 8024039

 * @summary javac, previous solution for JDK-8022186 was incorrect

 * @library /tools/lib

 *          jdk.compiler/com.sun.tools.javac.api

 *          jdk.compiler/com.sun.tools.javac.file

 *          jdk.compiler/com.sun.tools.javac.main

 *          jdk.compiler/com.sun.tools.javac.util

 * @build ToolBox

 * @run main NoDeadCodeGenerationOnTrySmtTest

 */

import java.io.File;

import java.nio.file.Paths;

import com.sun.tools.classfile.ClassFile;

import com.sun.tools.classfile.Code_attribute;

import com.sun.tools.classfile.Code_attribute.Exception_data;

import com.sun.tools.classfile.Method;

import com.sun.tools.javac.util.Assert;

public class NoDeadCodeGenerationOnTrySmtTest {

    static final String testSource =

        "public class Test {\n" +

        "    void m1(int arg) {\n" +

        "        synchronized (new Integer(arg)) {\n" +

        "            {\n" +

        "                label0:\n" +

        "                do {\n" +

        "                    break label0;\n" +

        "                } while (arg != 0);\n" +

        "            }\n" +

        "        }\n" +

        "    }\n" +

        "    void m2(int arg) {\n" +

        "        synchronized (new Integer(arg)) {\n" +

        "            {\n" +

        "                label0:\n" +

        "                {\n" +

        "                    break label0;\n" +

        "                }\n" +

        "            }\n" +

        "        }\n" +

        "    }\n" +

        "}";

    static final int[][] expectedExceptionTable = {

    //  {from,         to,         target,      type},

        {11,           13,         16,          0},

        {16,           19,         16,          0}

    };

    static final String[] methodsToLookFor = {"m1", "m2"};

    ToolBox tb = new ToolBox();

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

        new NoDeadCodeGenerationOnTrySmtTest().run();

    }

    void run() throws Exception {

        compileTestClass();

        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),

                "Test.class").toUri()), methodsToLookFor);

    }

    void compileTestClass() throws Exception {

        tb.new JavacTask()

                .sources(testSource)

                .run();

    }

    void checkClassFile(final File cfile, String[] methodsToFind) throws Exception {

        ClassFile classFile = ClassFile.read(cfile);

        int numberOfmethodsFound = 0;

        for (String methodToFind : methodsToFind) {

            for (Method method : classFile.methods) {

                if (method.getName(classFile.constant_pool).equals(methodToFind)) {

                    numberOfmethodsFound++;

                    Code_attribute code = (Code_attribute) method.attributes.get("Code");

                    Assert.check(code.exception_table_length == expectedExceptionTable.length,

                            "The ExceptionTable found has a length different to the expected one");

                    int i = 0;

                    for (Exception_data entry: code.exception_table) {

                        Assert.check(entry.start_pc == expectedExceptionTable[i][0] &&

                                entry.end_pc == expectedExceptionTable[i][1] &&

                                entry.handler_pc == expectedExceptionTable[i][2] &&

                                entry.catch_type == expectedExceptionTable[i][3],

                                "Exception table entry at pos " + i + " differ from expected.");

                        i++;

                    }

                }

            }

        }

        Assert.check(numberOfmethodsFound == 2, "Some seek methods were not found");

    }

    void error(String msg) {

        throw new AssertionError(msg);

    }

}