test/hotspot/jtreg/runtime/appcds/LongClassListPath.java

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/*
 * @test
 * @summary Test the handling of long path to the classlist file.
 * @requires vm.cds
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *          java.management
 *          jdk.jartool/sun.tools.jar
 * @compile test-classes/Hello.java
 * @run driver LongClassListPath
 */

import java.io.File;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import java.util.Arrays;
import jdk.test.lib.cds.CDSOptions;
import jdk.test.lib.cds.CDSTestUtils;
import jdk.test.lib.process.OutputAnalyzer;

public class LongClassListPath {
    private static final int MAX_PATH = 260;
    public static void main(String[] args) throws Exception {
        String[] classes = {"hello"};
        String classList =
            CDSTestUtils.makeClassList(classes).getPath();
        String archiveName = "LongClassListPath.jsa";

        // Create a directory with long path and copy the classlist file to
        // the directory.
        Path classDir = Paths.get(System.getProperty("test.classes"));
        Path destDir = classDir;
        int subDirLen = MAX_PATH - classDir.toString().length() - 2;
        if (subDirLen > 0) {
            char[] chars = new char[subDirLen];
            Arrays.fill(chars, 'x');
            String subPath = new String(chars);
            destDir = Paths.get(System.getProperty("test.classes"), subPath);
        }
        File longDir = destDir.toFile();
        longDir.mkdir();
        String destClassList = longDir.getPath() + File.separator + "LongClassListPath.classlist";
        Files.copy(Paths.get(classList), Paths.get(destClassList), StandardCopyOption.REPLACE_EXISTING);

        CDSOptions opts = (new CDSOptions())
            .addPrefix("-XX:ExtraSharedClassListFile=" + destClassList, "-cp", JarBuilder.getOrCreateHelloJar())
            .setArchiveName(archiveName);
        CDSTestUtils.createArchiveAndCheck(opts);
    }
}