--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/Unsafe/AllocateMemory.java Fri Jan 23 11:44:21 2015 -0800
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2015, 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
+ * @summary Verifies behaviour of Unsafe.allocateMemory
+ * @library /testlibrary
+ * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:MallocMaxTestWords=20m AllocateMemory
+ */
+
+import com.oracle.java.testlibrary.*;
+import sun.misc.Unsafe;
+import static com.oracle.java.testlibrary.Asserts.*;
+
+public class AllocateMemory {
+ public static void main(String args[]) throws Exception {
+ Unsafe unsafe = Utils.getUnsafe();
+
+ // Allocate a byte, write to the location and read back the value
+ long address = unsafe.allocateMemory(1);
+ assertNotEquals(address, 0L);
+
+ unsafe.putByte(address, Byte.MAX_VALUE);
+ assertEquals(Byte.MAX_VALUE, unsafe.getByte(address));
+ unsafe.freeMemory(address);
+
+ // Call to allocateMemory() with a negative value should result in an IllegalArgumentException
+ try {
+ address = unsafe.allocateMemory(-1);
+ throw new RuntimeException("Did not get expected IllegalArgumentException");
+ } catch (IllegalArgumentException e) {
+ // Expected
+ assertNotEquals(address, 0L);
+ }
+
+ // allocateMemory() should throw an OutOfMemoryError when the underlying malloc fails,
+ // we test this by limiting the malloc using -XX:MallocMaxTestWords
+ try {
+ address = unsafe.allocateMemory(20 * 1024 * 1024 * 8);
+ } catch (OutOfMemoryError e) {
+ // Expected
+ return;
+ }
+ throw new RuntimeException("Did not get expected OutOfMemoryError");
+ }
+}