--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/processing/PackageInfo/Overwrite/Processor.java	Thu Sep 13 15:29:44 2018 -0700
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2018, Google Inc. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+import java.io.IOError;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.Set;
+import javax.annotation.processing.RoundEnvironment;
+import javax.annotation.processing.SupportedAnnotationTypes;
+import javax.lang.model.element.PackageElement;
+import javax.lang.model.element.TypeElement;
+
+@SupportedAnnotationTypes("*")
+public class Processor extends JavacTestingAbstractProcessor {
+
+    boolean first = true;
+
+    @Override
+    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
+        if (first) {
+            // Annotations are present on the initial package-info loaded from the classpath.
+            PackageElement p = processingEnv.getElementUtils().getPackageElement("p");
+            if (p.getAnnotationMirrors().isEmpty()) {
+                throw new AssertionError(
+                        "expected package annotations: " + p.getAnnotationMirrors());
+            }
+            // Overwrite the package-info with a new unannotated package-info.
+            try (OutputStream os =
+                    processingEnv
+                            .getFiler()
+                            .createSourceFile("p.package-info")
+                            .openOutputStream()) {
+                os.write("package p;".getBytes(UTF_8));
+            } catch (IOException e) {
+                throw new IOError(e);
+            }
+            first = false;
+        }
+        // The package-info's symbol should be reset between rounds, and when annotation
+        // processing is over the package-info should be unannotated.
+        PackageElement p = processingEnv.getElementUtils().getPackageElement("p");
+        if (roundEnv.processingOver()) {
+            if (!p.getAnnotationMirrors().isEmpty()) {
+                throw new AssertionError(
+                        "expected no package annotations: " + p.getAnnotationMirrors());
+            }
+        }
+        return false;
+    }
+}