jdk-24/test/hotspot/jtreg/runtime/cds/appcds/GraalWithLimitedMetaspace.java

/*
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 * 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.
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/*
 * @test
 * @summary Test dumping with limited metaspace with loading of JVMCI related classes.
 *          VM should not crash but CDS dump will abort upon failure in allocating metaspace.
 * @requires vm.cds & vm.graal.enabled & vm.compMode == "Xmixed"
 * @library /test/lib
 * @build UseAppCDS_Test
 * @run driver ClassFileInstaller -jar test.jar UseAppCDS_Test
 * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI
 *      -XX:+TieredCompilation -XX:+UseJVMCICompiler -Djvmci.Compiler=graal
 *      GraalWithLimitedMetaspace
 */

import jdk.test.lib.cds.CDSTestUtils;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;

import java.util.ArrayList;
import java.util.List;
import java.io.*;

public class GraalWithLimitedMetaspace {

    // Class UseAppCDS_Test is loaded by the App loader

    static final String TEST_OUT = "UseAppCDS_Test.main--executed";

    private static final String TESTJAR = "./test.jar";
    private static final String TESTNAME = "UseAppCDS_Test";
    private static final String TESTCLASS = TESTNAME + ".class";

    private static final String CLASSLIST_FILE = "./GraalWithLimitedMetaspace.classlist";
    private static final String ARCHIVE_FILE = "./GraalWithLimitedMetaspace.jsa";
    private static final String BOOTCLASS = "java.lang.Class";

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

        // dump loaded classes into a classlist file
        dumpLoadedClasses(new String[] { BOOTCLASS, TESTNAME });


        // create an archive using the classlist
        dumpArchive();

    }

    public static List<String> toClassNames(String filename) throws IOException {
        ArrayList<String> classes = new ArrayList<>();
        try (BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(filename)))) {
            for (; ; ) {
                String line = br.readLine();
                if (line == null) {
                    break;
                }
                classes.add(line.replaceAll("/", "."));
            }
        }
        return classes;
    }

    static void dumpLoadedClasses(String[] expectedClasses) throws Exception {
        ProcessBuilder pb = ProcessTools.createTestJvm(
            "-XX:DumpLoadedClassList=" + CLASSLIST_FILE,
            // trigger JVMCI runtime init so that JVMCI classes will be
            // included in the classlist
            "-XX:+UnlockExperimentalVMOptions",
            "-XX:+EnableJVMCI",
            "-XX:+EagerJVMCI",
            "-cp",
            TESTJAR,
            TESTNAME,
            TEST_OUT);

        OutputAnalyzer output = TestCommon.executeAndLog(pb, "dump-loaded-classes")
            .shouldHaveExitValue(0)
            .shouldContain(TEST_OUT);

        List<String> dumpedClasses = toClassNames(CLASSLIST_FILE);

        for (String clazz : expectedClasses) {
            if (!dumpedClasses.contains(clazz)) {
                throw new RuntimeException(clazz + " missing in " +
                                           CLASSLIST_FILE);
            }
        }
    }

    static void dumpArchive() throws Exception {
        ProcessBuilder pb = ProcessTools.createTestJvm(
            "-cp",
            TESTJAR,
            "-XX:SharedClassListFile=" + CLASSLIST_FILE,
            "-XX:SharedArchiveFile=" + ARCHIVE_FILE,
            "-Xlog:cds",
            "-Xshare:dump",
            "-XX:MetaspaceSize=12M",
            "-XX:MaxMetaspaceSize=12M");

        OutputAnalyzer output = TestCommon.executeAndLog(pb, "dump-archive");
        int exitValue = output.getExitValue();
        if (exitValue == 1) {
            output.shouldContain("Failed allocating metaspace object type");
        } else if (exitValue == 0) {
            output.shouldContain("Loading classes to share");
        } else {
            throw new RuntimeException("Unexpected exit value " + exitValue);
        }
    }
}