/*

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

 *

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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,

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/*

 * @test

 * @summary Write a lots of shared strings.

 * @requires vm.cds.archived.java.heap

 * @modules jdk.jartool/sun.tools.jar

 * @build HelloString

 * @run driver/timeout=500 SharedStringsStress

 */

import java.io.File;

import java.io.FileOutputStream;

import java.io.OutputStreamWriter;

import java.io.PrintWriter;

import jdk.test.lib.process.OutputAnalyzer;

import jdk.test.lib.process.ProcessTools;

public class SharedStringsStress {

    static String sharedArchiveConfigFile = System.getProperty("user.dir") + File.separator + "SharedStringsStress_gen.txt";

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

        try (FileOutputStream fos = new FileOutputStream(sharedArchiveConfigFile)) {

            PrintWriter out = new PrintWriter(new OutputStreamWriter(fos));

            out.println("VERSION: 1.0");

            out.println("@SECTION: String");

            out.println("31: shared_test_string_unique_14325");

            for (int i=0; i<200000; i++) {

                String s = "generated_string " + i;

                out.println(s.length() + ": " + s);

            }

            out.close();

        }

        SharedStringsUtils.run(args, SharedStringsStress::test);

    }

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

        String vmOptionsPrefix[] = SharedStringsUtils.getChildVMOptionsPrefix();

        String appJar = JarBuilder.build("SharedStringsStress", "HelloString");

        String test_cases[][] = {

            // default heap size

            {},

            // Test for handling of heap fragmentation. With sharedArchiveConfigFile, we will dump about

            // 18MB of shared objects on 64 bit VM (smaller on 32-bit).

            //

            // During dump time, an extra copy of these objects are allocated,

            // so we need about 36MB, plus a few MB for other system data. So 64MB total heap

            // should be enough.

            //

            // The VM should executed a full GC to maximize contiguous free space and

            // avoid fragmentation.

            {"-Xmx64m"},

        };

        for (String[] extra_opts: test_cases) {

            vmOptionsPrefix = TestCommon.concat(vmOptionsPrefix, extra_opts);

            OutputAnalyzer dumpOutput = TestCommon.dump(appJar, TestCommon.list("HelloString"),

                TestCommon.concat(vmOptionsPrefix,

                    "-XX:SharedArchiveConfigFile=" + sharedArchiveConfigFile,

                    "-Xlog:gc+region+cds",

                    "-Xlog:gc+region=trace"));

            TestCommon.checkDump(dumpOutput);

            OutputAnalyzer execOutput = TestCommon.exec(appJar,

                TestCommon.concat(vmOptionsPrefix, "HelloString"));

            TestCommon.checkExec(execOutput);

        }

    }

}