test/langtools/tools/javac/annotations/typeAnnotations/classfile/TypeAnnotationPropagationTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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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/*
 * @test
 * @bug 8144185
 * @summary javac produces incorrect RuntimeInvisibleTypeAnnotations length attribute
 * @modules jdk.jdeps/com.sun.tools.classfile
 */

import static java.lang.annotation.ElementType.TYPE_USE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import com.sun.tools.classfile.Attribute;
import com.sun.tools.classfile.ClassFile;
import com.sun.tools.classfile.Code_attribute;
import com.sun.tools.classfile.Method;
import com.sun.tools.classfile.RuntimeVisibleTypeAnnotations_attribute;
import com.sun.tools.classfile.TypeAnnotation;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import java.util.Arrays;
import java.util.Objects;

public class TypeAnnotationPropagationTest extends ClassfileTestHelper {
    public static void main(String[] args) throws Exception {
        new TypeAnnotationPropagationTest().run();
    }

    public void run() throws Exception {
        ClassFile cf = getClassFile("TypeAnnotationPropagationTest$Test.class");

        Method f = null;
        for (Method m : cf.methods) {
            if (m.getName(cf.constant_pool).contains("f")) {
                f = m;
                break;
            }
        }

        int idx = f.attributes.getIndex(cf.constant_pool, Attribute.Code);
        Code_attribute cattr = (Code_attribute) f.attributes.get(idx);
        idx = cattr.attributes.getIndex(cf.constant_pool, Attribute.RuntimeVisibleTypeAnnotations);
        RuntimeVisibleTypeAnnotations_attribute attr =
                (RuntimeVisibleTypeAnnotations_attribute) cattr.attributes.get(idx);

        TypeAnnotation anno = attr.annotations[0];
        assertEquals(anno.position.lvarOffset, new int[] {3}, "start_pc");
        assertEquals(anno.position.lvarLength, new int[] {8}, "length");
        assertEquals(anno.position.lvarIndex, new int[] {1}, "index");
    }

    void assertEquals(int[] actual, int[] expected, String message) {
        if (!Arrays.equals(actual, expected)) {
            throw new AssertionError(
                    String.format(
                            "actual: %s, expected: %s, %s",
                            Arrays.toString(actual), Arrays.toString(expected), message));
        }
    }

    /** ********************* Test class ************************ */
    static class Test {
        void f() {
            @A String s = "";
            Runnable r =
                    () -> {
                        Objects.requireNonNull(s);
                        Objects.requireNonNull(s);
                        Objects.requireNonNull(s);
                        Objects.requireNonNull(s);
                        Objects.requireNonNull(s);
                        Objects.requireNonNull(s);
                    };
        }

        @Retention(RUNTIME)
        @Target(TYPE_USE)
        @interface A {}
    }
}