test/hotspot/jtreg/runtime/cds/appcds/cacheObject/CheckCachedMirrorApp.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/CheckCachedMirrorApp.java	Mon Jul 29 10:34:20 2019 -0400
@@ -0,0 +1,92 @@
+/*
+ * 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 java.net.URLClassLoader;
+import sun.hotspot.WhiteBox;
+
+//
+// Test class mirror objects are cached when open archive heap objects are mapped:
+//  - Well-known shared library classes:
+//      java.lang.Object
+//      java.lang.String
+//  - Shared application class loaded by the system class loader
+//  - Shared application class loaded user defined class loader
+//
+public class CheckCachedMirrorApp {
+    static WhiteBox wb;
+    public static void main(String args[]) throws Exception {
+        String path = args[0];
+        URL url = new File(path).toURI().toURL();
+        URL[] urls = new URL[] {url};
+
+        URLClassLoader loader = new URLClassLoader(urls);
+        Class hello = loader.loadClass("Hello");
+        System.out.println("Loaded " + hello + " from " + url + " using loader " + loader);
+
+        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;
+        }
+
+        // Well-known shared library classes
+        Class object_class = Object.class;
+        checkMirror(object_class, true);
+        Class string_class = String.class;
+        checkMirror(string_class, true);
+
+        // Shared app class
+        Class app_class = CheckCachedMirrorApp.class;
+        checkMirror(app_class, true);
+
+        // Hello is shared class and loaded by the 'loader' defined in current app.
+        // It should not have cached resolved_references.
+        Class class_with_user_defined_loader = hello;
+        checkMirror(class_with_user_defined_loader, false);
+    }
+
+    static void checkMirror(Class c, boolean mirrorShouldBeArchived) {
+        System.out.print("Check cached mirror for " + c);
+        if (wb.isSharedClass(c)) {
+            // Check if the Class object is cached
+            if (mirrorShouldBeArchived && wb.isShared(c)) {
+                System.out.println(c + " mirror is cached. Expected.");
+            } else if (!mirrorShouldBeArchived && !wb.isShared(c)) {
+                System.out.println(c + " mirror is not cached. Expected.");
+            } else if (mirrorShouldBeArchived && !wb.isShared(c)) {
+                throw new RuntimeException(
+                    "FAILED. " + c + " mirror is not cached.");
+            } else {
+                throw new RuntimeException(
+                    "FAILED. " + c + " mirror should not be cached.");
+            }
+        } else {
+          System.out.println("Class " + c + "is not shared, skipping the check for mirror");
+        }
+    }
+}