test/hotspot/jtreg/runtime/Nestmates/privateStaticFields/TestJNI.java
changeset 50735 2f2af62dfac7
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/Nestmates/privateStaticFields/TestJNI.java	Sat Jun 23 01:32:41 2018 -0400
@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2018, 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.
+ */
+
+/*
+ * @test
+ * @bug 8046171
+ * @summary Test JNI access to private static fields between nestmates and nest-host
+ *          using different flavours of named nested types
+ * @compile ../NestmatesJNI.java
+ * @run main/othervm/native TestJNI
+ * @run main/othervm/native -Xcheck:jni TestJNI
+ */
+public class TestJNI {
+
+    // Private field of nest-host for nestmates to access
+    private static int priv_field;
+
+    static final String FIELD = "priv_field";
+
+    // public constructor so we aren't relying on private access
+    public TestJNI() {}
+
+    // Methods that will access private static fields of nestmates
+
+    // NOTE: No InnerNested calls in this test because non-static nested types
+    // can't have static fields. Also no StaticIface calls as static interface
+    // fields must be public (and final)
+
+    void access_priv(TestJNI o) {
+        priv_field = getAndInc(o.getClass(), FIELD);
+    }
+    void access_priv(StaticNested o) {
+        priv_field = getAndInc(o.getClass(), FIELD);
+    }
+
+    // The various nestmates
+
+    static interface StaticIface {
+
+        // Methods that will access private static fields of nestmates
+
+        default void access_priv(TestJNI o) {
+            int priv_field = getAndInc(o.getClass(), FIELD);
+        }
+        default void access_priv(StaticNested o) {
+            int priv_field = getAndInc(o.getClass(), FIELD);
+        }
+    }
+
+    static class StaticNested {
+
+        private static int priv_field;
+
+        // public constructor so we aren't relying on private access
+        public StaticNested() {}
+
+        // Methods that will access private static fields of nestmates
+
+        void access_priv(TestJNI o) {
+            priv_field = getAndInc(o.getClass(), FIELD);
+        }
+        void access_priv(StaticNested o) {
+            priv_field = getAndInc(o.getClass(), FIELD);
+        }
+    }
+
+    class InnerNested {
+
+        // public constructor so we aren't relying on private access
+        public InnerNested() {}
+
+        void access_priv(TestJNI o) {
+            int priv_field = getAndInc(o.getClass(), FIELD);
+        }
+        void access_priv(StaticNested o) {
+            int priv_field = getAndInc(o.getClass(), FIELD);
+        }
+    }
+
+    public static void main(String[] args) {
+        TestJNI o = new TestJNI();
+        StaticNested s = new StaticNested();
+        InnerNested i = o.new InnerNested();
+        StaticIface intf = new StaticIface() {};
+
+        o.access_priv(new TestJNI());
+        o.access_priv(s);
+
+        s.access_priv(o);
+        s.access_priv(new StaticNested());
+
+        i.access_priv(o);
+        i.access_priv(s);
+
+        intf.access_priv(o);
+        intf.access_priv(s);
+    }
+
+    static int getAndInc(Class<?> klass, String field) {
+        String definingClass = klass.getName();
+        String desc = "Access to static field " + definingClass + "." + field;
+        int first, second;
+        try {
+            first = NestmatesJNI.getStaticIntField(definingClass, field);
+            NestmatesJNI.setStaticIntField(definingClass, field, (first + 1));
+            second = NestmatesJNI.getStaticIntField(definingClass, field);
+        }
+        catch (Throwable t) {
+            throw new Error(desc + ": Unexpected exception: " + t, t);
+        }
+        if (second != first + 1) {
+            throw new Error(desc + ": wrong field values: first=" + first +
+                            ", second=" + second + " (should equal first+1)");
+        }
+        System.out.println(desc + " - passed");
+        return first;
+    }
+}