/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

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 * 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.

 *

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 */

/*

 * @test

 * @bug 7008643

 * @summary inlined finally clauses confuse debuggers

 * @library /tools/lib

 * @build ToolBox

 * @run main InlinedFinallyConfuseDebuggersTest

 */

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.LineNumberTable_attribute;

import com.sun.tools.classfile.Method;

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

public class InlinedFinallyConfuseDebuggersTest {

    static final String testSource =

    /* 01 */        "public class InlinedFinallyTest {\n" +

    /* 02 */        "    void lookForThisMethod(int value) {\n" +

    /* 03 */        "        try {\n" +

    /* 04 */        "            if (value > 0) {\n" +

    /* 05 */        "                System.out.println(\"if\");\n" +

    /* 06 */        "                return;\n" +

    /* 07 */        "            }\n" +

    /* 08 */        "        } finally {\n" +

    /* 09 */        "            System.out.println(\"finally\");\n" +

    /* 10 */        "        }\n" +

    /* 11 */        "    }\n" +

    /* 12 */        "}";

    static final int[][] expectedLNT = {

    //  {line-number, start-pc},

        {4,           0},       //if (value > 0) {

        {5,           4},       //    System.out.println("if");

        {9,           12},      //System.out.println("finally");

        {6,           20},      //    return;

        {9,           21},      //System.out.println("finally");

        {10,          29},

        {9,           32},      //System.out.println("finally");

        {11,          43},

    };

    static final String methodToLookFor = "lookForThisMethod";

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

        new InlinedFinallyConfuseDebuggersTest().run();

    }

    ToolBox tb = new ToolBox();

    void run() throws Exception {

        compileTestClass();

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

                "InlinedFinallyTest.class").toUri()), methodToLookFor);

    }

    void compileTestClass() throws Exception {

        tb.new JavacTask()

                .sources(testSource)

                .run();

    }

    void checkClassFile(final File cfile, String methodToFind) throws Exception {

        ClassFile classFile = ClassFile.read(cfile);

        boolean methodFound = false;

        for (Method method : classFile.methods) {

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

                methodFound = true;

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

                LineNumberTable_attribute lnt =

                        (LineNumberTable_attribute) code.attributes.get("LineNumberTable");

                Assert.check(lnt.line_number_table_length == expectedLNT.length,

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

                int i = 0;

                for (LineNumberTable_attribute.Entry entry: lnt.line_number_table) {

                    Assert.check(entry.line_number == expectedLNT[i][0] &&

                            entry.start_pc == expectedLNT[i][1],

                            "LNT entry at pos " + i + " differ from expected." +

                            "Found " + entry.line_number + ":" + entry.start_pc +

                            ". Expected " + expectedLNT[i][0] + ":" + expectedLNT[i][1]);

                    i++;

                }

            }

        }

        Assert.check(methodFound, "The seek method was not found");

    }

    void error(String msg) {

        throw new AssertionError(msg);

    }

}