8345421: (bf) Create specific test for temporary direct buffers and the buffer size limit

Reviewed-by: alanb

test/jdk/java/nio/Buffer/UnmeteredTempBuffers.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2024, 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 8344882
+ * @summary Deallocation failure for temporary buffers
+ * @run junit/othervm -XX:MaxDirectMemorySize=32768 UnmeteredTempBuffers
+ */
+import java.io.InputStream;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import static java.nio.file.StandardOpenOption.*;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+import static org.junit.jupiter.api.Assertions.*;
+
+public class UnmeteredTempBuffers {
+    @ParameterizedTest
+    @ValueSource(ints = {16384, 32768, 32769, 65536})
+    void testFileChannel(int cap) throws IOException {
+        Path file = Files.createTempFile("prefix", "suffix");
+        try (FileChannel ch = FileChannel.open(file, WRITE, DELETE_ON_CLOSE)) {
+            ByteBuffer buf = ByteBuffer.wrap(new byte[cap]);
+            try {
+                ch.write(buf);
+            } catch (OutOfMemoryError oome) {
+                throw new RuntimeException(oome);
+            }
+        }  finally {
+            Files.deleteIfExists(file);
+        }
+    }
+
+    @ParameterizedTest
+    @ValueSource(ints = {16384, 32768, 32769, 65536})
+    void testInputStream(int cap) throws IOException {
+        Path file = Files.createTempFile("prefix", "suffix");
+        try {
+            byte[] bytes = new byte[cap];
+            Files.write(file, bytes);
+            try (InputStream in = Files.newInputStream(file)) {
+                in.read(bytes);
+            } catch (OutOfMemoryError oome) {
+                throw new RuntimeException(oome);
+            }
+        }  finally {
+            Files.delete(file);
+        }
+    }
+}