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

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/*
 * @test
 * @summary DumpLoadedClassList should exclude generated classes, classes in bootclasspath/a and
 *          --patch-module.
 * @requires vm.cds
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *          jdk.jartool/sun.tools.jar
 * @compile test-classes/ArrayListTest.java
 * @run main DumpClassList
 */

import jdk.test.lib.compiler.InMemoryJavaCompiler;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;

public class DumpClassList {
    public static void main(String[] args) throws Exception {
        // build The app
        String[] appClass = new String[] {"ArrayListTest"};
        String classList = "app.list";

        JarBuilder.build("app", appClass[0]);
        String appJar = TestCommon.getTestJar("app.jar");

        // build patch-module
        String source = "package java.lang; "                       +
                        "public class NewClass { "                  +
                        "    static { "                             +
                        "        System.out.println(\"NewClass\"); "+
                        "    } "                                    +
                        "}";

        ClassFileInstaller.writeClassToDisk("java/lang/NewClass",
             InMemoryJavaCompiler.compile("java.lang.NewClass", source, "--patch-module=java.base"),
             System.getProperty("test.classes"));

        String patchJar = JarBuilder.build("javabase", "java/lang/NewClass");

        // build bootclasspath/a
        String source2 = "package boot.append; "                 +
                        "public class Foo { "                    +
                        "    static { "                          +
                        "        System.out.println(\"Foo\"); "  +
                        "    } "                                 +
                        "}";

        ClassFileInstaller.writeClassToDisk("boot/append/Foo",
             InMemoryJavaCompiler.compile("boot.append.Foo", source2),
             System.getProperty("test.classes"));

        String appendJar = JarBuilder.build("bootappend", "boot/append/Foo");

        // dump class list
        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
            true,
            "-XX:DumpLoadedClassList=" + classList,
            "--patch-module=java.base=" + patchJar,
            "-Xbootclasspath/a:" + appendJar,
            "-cp",
            appJar,
            appClass[0]);
        OutputAnalyzer output = TestCommon.executeAndLog(pb, "dumpClassList");
        TestCommon.checkExecReturn(output, 0, true,
                                   "hello world",
                                   "skip writing class java/lang/NewClass") // skip classes outside of jrt image
            .shouldNotContain("skip writing class boot/append/Foo");        // but classes on -Xbootclasspath/a should not be skipped

        output = TestCommon.createArchive(appJar, appClass,
                                          "-Xbootclasspath/a:" + appendJar,
                                          "-Xlog:class+load",
                                          "-XX:SharedClassListFile=" + classList);
        TestCommon.checkDump(output)
            .shouldNotContain("Preload Warning: Cannot find java/lang/invoke/LambdaForm")
            .shouldNotContain("Preload Warning: Cannot find boot/append/Foo")
            .shouldContain("[info][class,load] boot.append.Foo");
    }
}