TestHeapDumpForLargeArray.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 * published by the Free Software Foundation.
 *
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 * 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).
 *
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 * 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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import java.io.File;
import java.util.stream.Collectors;

import jdk.test.lib.apps.LingeredApp;
import jdk.test.lib.JDKToolLauncher;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.SA.SATestUtils;
import jdk.test.lib.Utils;

/**
 * @test
 * @library /test/lib
 * @bug 8171084
 * @requires vm.hasSA & (vm.bits == "64" & os.maxMemory > 8g)
 * @modules java.base/jdk.internal.misc
 *          jdk.hotspot.agent/sun.jvm.hotspot
 *          jdk.hotspot.agent/sun.jvm.hotspot.utilities
 *          jdk.hotspot.agent/sun.jvm.hotspot.oops
 *          jdk.hotspot.agent/sun.jvm.hotspot.debugger
 * @run main/timeout=1800/othervm -Xmx8g TestHeapDumpForLargeArray
 */

public class TestHeapDumpForLargeArray {

    private static LingeredAppWithLargeArray theApp = null;

    private static void attachAndDump(String heapDumpFileName,
                                      long lingeredAppPid) throws Exception {

        JDKToolLauncher launcher = JDKToolLauncher.createUsingTestJDK("jhsdb");
        launcher.addToolArg("jmap");
        launcher.addToolArg("--binaryheap");
        launcher.addToolArg("--dumpfile");
        launcher.addToolArg(heapDumpFileName);
        launcher.addToolArg("--pid");
        launcher.addToolArg(Long.toString(lingeredAppPid));

        ProcessBuilder processBuilder = SATestUtils.createProcessBuilder(launcher);
        System.out.println(
            processBuilder.command().stream().collect(Collectors.joining(" ")));

        OutputAnalyzer SAOutput = ProcessTools.executeProcess(processBuilder);
        SAOutput.shouldHaveExitValue(0);
        SAOutput.shouldNotContain("Heap segment size overflow");
        SAOutput.shouldContain("truncating to");
        SAOutput.shouldContain("heap written to");
        SAOutput.shouldContain(heapDumpFileName);
        System.out.println(SAOutput.getOutput());

    }

    public static void main (String... args) throws Exception {
        SATestUtils.skipIfCannotAttach(); // throws SkippedException if attach not expected to work.

        String heapDumpFileName = "LargeArrayHeapDump.bin";

        File heapDumpFile = new File(heapDumpFileName);
        if (heapDumpFile.exists()) {
            heapDumpFile.delete();
        }

        try {
            // Need to add the default arguments first to have explicit
            // -Xmx8g last, otherwise test will fail if default
            // arguments contain a smaller -Xmx.
            String[] vmArgs = Utils.prependTestJavaOpts(
                "-XX:+UsePerfData",
                "-Xmx8g");

            theApp = new LingeredAppWithLargeArray();
            LingeredApp.startAppExactJvmOpts(theApp, vmArgs);
            attachAndDump(heapDumpFileName, theApp.getPid());
        } finally {
            LingeredApp.stopApp(theApp);
            heapDumpFile.delete();
        }
    }
}