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

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * version 2 for more details (a copy is included in the LICENSE file that
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/*
 * @test CommandLineFlagCombo
 * @requires vm.cds.write.archived.java.heap
 * @comment This test explicitly chooses the type of GC to be used by sub-processes. It may conflict with the GC type set
 * via the -vmoptions command line option of JTREG. vm.gc==null will help the test case to discard the explicitly passed
 * vm options.
 * @requires (vm.gc=="null")
 * @summary Test command line flag combinations that
 *          could likely affect the behaviour of AppCDS
 * @library /test/lib
 * @build sun.hotspot.WhiteBox
 * @run driver jdk.test.lib.helpers.ClassFileInstaller sun.hotspot.WhiteBox
 * @compile test-classes/Hello.java
 * @run main/othervm/timeout=240 -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. CommandLineFlagCombo
 */

import jdk.test.lib.BuildHelper;
import jdk.test.lib.Platform;
import jdk.test.lib.process.OutputAnalyzer;

import sun.hotspot.code.Compiler;
import sun.hotspot.WhiteBox;

public class CommandLineFlagCombo {

    // shared base address test table
    private static final String[] testTable = {
        "-XX:+UseG1GC", "-XX:+UseSerialGC", "-XX:+UseParallelGC",
        "-XX:+UseLargePages", // may only take effect on machines with large-pages
        "-XX:+UseCompressedClassPointers",
        "-XX:+UseCompressedOops",
        "-XX:ObjectAlignmentInBytes=16",
        "-XX:ObjectAlignmentInBytes=32",
        "-XX:ObjectAlignmentInBytes=64"
    };

    public static void main(String[] args) throws Exception {
        String appJar = JarBuilder.getOrCreateHelloJar();
        String classList[] = {"Hello"};

        for (String testEntry : testTable) {
            System.out.println("CommandLineFlagCombo = " + testEntry);

            if (skipTestCase(testEntry))
                continue;

            OutputAnalyzer dumpOutput = TestCommon.dump(appJar, classList, testEntry);
            if (!TestCommon.isDynamicArchive()) {
                TestCommon.checkDump(dumpOutput, "Loading classes to share");
            } else {
                if (testEntry.contains("ObjectAlignmentInBytes")) {
                   dumpOutput.shouldHaveExitValue(1)
                             .shouldMatch("The shared archive file's ObjectAlignmentInBytes of .* does not equal the current ObjectAlignmentInBytes of");
                } else {
                   TestCommon.checkDump(dumpOutput, "Loading classes to share");
                }
            }

            if ((TestCommon.isDynamicArchive() && !testEntry.contains("ObjectAlignmentInBytes")) ||
                !TestCommon.isDynamicArchive()) {
                OutputAnalyzer execOutput = TestCommon.exec(appJar, testEntry, "Hello");
                TestCommon.checkExec(execOutput, "Hello World");
            }
        }

        for (int i=0; i<2; i++) {
            String g1Flag, serialFlag;

            // Interned strings are supported only with G1GC. However, we should not crash if:
            // 0: archive has shared strings, but run time doesn't support shared strings
            // 1: archive has no shared strings, but run time supports shared strings

            String dump_g1Flag     = "-XX:" + (i == 0 ? "+" : "-") + "UseG1GC";
            String run_g1Flag      = "-XX:" + (i != 0 ? "+" : "-") + "UseG1GC";
            String dump_serialFlag = "-XX:" + (i != 0 ? "+" : "-") + "UseSerialGC";
            String run_serialFlag  = "-XX:" + (i == 0 ? "+" : "-") + "UseSerialGC";

            OutputAnalyzer dumpOutput = TestCommon.dump(
               appJar, classList, dump_g1Flag, dump_serialFlag);

            TestCommon.checkDump(dumpOutput, "Loading classes to share");

            OutputAnalyzer execOutput = TestCommon.exec(appJar, run_g1Flag, run_serialFlag, "Hello");
            TestCommon.checkExec(execOutput, "Hello World");
        }
    }

    private static boolean skipTestCase(String testEntry) throws Exception {
        if (Platform.is32bit())
        {
            if (testEntry.equals("-XX:+UseCompressedOops") ||
                testEntry.equals("-XX:+UseCompressedClassPointers") ||
                testEntry.contains("ObjectAlignmentInBytes") )
            {
                System.out.println("Test case not applicable on 32-bit platforms");
                return true;
            }
        }

        if (!WhiteBox.getWhiteBox().isJFRIncluded())
        {
            System.out.println("JFR does not exist");
            return true;
        }
        return false;
    }
}