test/hotspot/jtreg/runtime/cds/appcds/SharedBaseAddress.java

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/*
 * @test SharedBaseAddress
 * @summary Test variety of values for SharedBaseAddress, in AppCDS mode,
 *          making sure VM handles normal values as well as edge values
 *          w/o a crash.
 * @requires vm.cds
 * @library /test/lib
 * @compile test-classes/Hello.java
 * @run main/timeout=240 SharedBaseAddress
 */

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

public class SharedBaseAddress {

    // shared base address test table for {32, 64}bit VM
    private static final String[] testTableShared = {
        "1g", "0", "1", "64k", "64M"
    };

    // shared base address test table for 64bit VM only
    private static final String[] testTable64 = {
        "8g", "64g","512g", "4t",
        "32t", "128t", "320g",
        "0x800001000"  // Default base address + 1 page - probably valid but unaligned to metaspace alignment, see JDK 8247522
    };

    public static void test(String[] testTable) throws Exception {
        String appJar = JarBuilder.getOrCreateHelloJar();

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

            // Note: some platforms may restrict valid values for SharedBaseAddress; the VM should print
            // a warning and use the default value instead. Similar, ASLR may prevent the given address
            // from being used; this too should handled gracefully by using the default base address.
            OutputAnalyzer dumpOutput = TestCommon.dump(
                appJar, new String[] {"Hello"}, "-XX:SharedBaseAddress=" + testEntry);
            TestCommon.checkDump(dumpOutput, "Loading classes to share");

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

    public static void main(String[] args) throws Exception {
        test(testTableShared);
        if (Platform.is64bit()) {
            test(testTable64);
        }
    }
}