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

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/*
 * @test
 * @summary Test for field annotations.
 * @requires vm.cds
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *          java.management
 *          jdk.jartool/sun.tools.jar
 * @compile test-classes/FieldAnnotationsApp.java test-classes/MyAnnotation.java
 * @run main FieldAnnotationsTest
 */

import jdk.test.lib.process.OutputAnalyzer;

// This is a test for the handling of multi-dimensional Arrays in MetaspaceClosure.
//
// We choose FieldAnnotations because they happen to be implemented as a multi-dimension
// Array (Annotations::_fields_annotations, which is of type Array<Array<unsigned char>*>*,
// and is handled by the template class PointerArrayRef<T> in metaspaceClosure.hpp).
//
// Specifically, we are testing the following C code, where _fields_annotations is non-NULL:
//
// void Annotations::metaspace_pointers_do(MetaspaceClosure* it) {
//   ...
//   it->push(&_fields_annotations);
//
// which will be matched with the function
//
// template <typename T> void MetaspaceClosure::push(Array<T*>** mpp, Writability w = _default)
//
public class FieldAnnotationsTest {
    public static void main(String[] args) throws Exception {
        String[] ARCHIVE_CLASSES = {"FieldAnnotationsApp", "MyAnnotation"};
        String appJar = JarBuilder.build("FieldAnnotationsTest", ARCHIVE_CLASSES);

        OutputAnalyzer dumpOutput = TestCommon.dump(
                appJar, ARCHIVE_CLASSES);
        TestCommon.checkDump(dumpOutput);

        OutputAnalyzer execOutput = TestCommon.exec(appJar, "FieldAnnotationsApp");
        TestCommon.checkExec(execOutput, "Field annotations are OK.");
    }
}