test/hotspot/jtreg/runtime/cds/appcds/cacheObject/MirrorWithReferenceFieldsApp.java
changeset 57567 b000362a89a0
parent 49329 04ed29f9ef33
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/cds/appcds/cacheObject/MirrorWithReferenceFieldsApp.java	Mon Jul 29 10:34:20 2019 -0400
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2018, 2019, Oracle and/or its affiliates. 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.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+import java.io.File;
+import java.net.URL;
+import sun.hotspot.WhiteBox;
+
+//
+// - Test static final String field with initial value in cached mirror should be also archived.
+// - GC should not crash when reference fields in cached mirror are updated at runtime
+//     - Reference fields are updated to point to runtime created objects
+//     - Reference fields are nullified
+//
+public class MirrorWithReferenceFieldsApp {
+
+    // Static String field with initial value
+    static final String archived_field = "abc";
+
+    // Static object field
+    static Object non_archived_field_1;
+
+    // Instance field
+    Integer non_archived_field_2;
+
+    public MirrorWithReferenceFieldsApp() {
+        non_archived_field_1 = new Object();
+        non_archived_field_2 = new Integer(1);
+    }
+
+    public static void main(String args[]) throws Exception {
+        WhiteBox wb = WhiteBox.getWhiteBox();
+
+        if (!wb.areOpenArchiveHeapObjectsMapped()) {
+            System.out.println("Archived open_archive_heap objects are not mapped.");
+            System.out.println("This may happen during normal operation. Test Skipped.");
+            return;
+        }
+
+        MirrorWithReferenceFieldsApp m = new MirrorWithReferenceFieldsApp();
+        m.test(wb);
+    }
+
+    public void test(WhiteBox wb) {
+        Class c = MirrorWithReferenceFieldsApp.class;
+        if (wb.isSharedClass(c)) {
+            // Check if the Class object is cached
+            if (wb.isShared(c)) {
+                System.out.println(c + " mirror is cached. Expected.");
+            } else {
+                throw new RuntimeException(
+                    "FAILED. " + c + " mirror should be cached.");
+            }
+
+            // Check fields
+
+            if (wb.isShared(archived_field)) {
+                System.out.println("archived_field is archived as excepted");
+            } else {
+                throw new RuntimeException(
+                    "FAILED. archived_field is not archived.");
+            }
+
+            // GC should not crash
+            System.gc();
+            System.gc();
+            System.gc();
+
+            non_archived_field_1 = null;
+            non_archived_field_2 = null;
+
+            System.gc();
+            System.gc();
+            System.gc();
+
+            System.out.println("Done.");
+        }
+    }
+}