| /* |
| * Copyright (c) 2014, 2016, 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 8047769 |
| * @modules java.base/java.lang.ref:open |
| * java.base/sun.security.provider:open |
| * @summary SecureRandom should be more frugal with file descriptors |
| */ |
| |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.lang.ref.Reference; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.UndeclaredThrowableException; |
| import java.util.Arrays; |
| |
| public class FileInputStreamPoolTest { |
| |
| static final byte[] bytes = new byte[]{1, 2, 3, 4, 5, 6, 7, 8}; |
| |
| static void testCaching(File file) throws IOException { |
| InputStream in1 = TestProxy.FileInputStreamPool_getInputStream(file); |
| InputStream in2 = TestProxy.FileInputStreamPool_getInputStream(file); |
| assertTrue(in1 == in2, |
| "1st InputStream: " + in1 + |
| " is not same as 2nd: " + in2); |
| |
| byte[] readBytes = new byte[bytes.length]; |
| int nread = in1.read(readBytes); |
| assertTrue(bytes.length == nread, |
| "short read: " + nread + |
| " bytes of expected: " + bytes.length); |
| assertTrue(Arrays.equals(readBytes, bytes), |
| "readBytes: " + Arrays.toString(readBytes) + |
| " not equal to expected: " + Arrays.toString(bytes)); |
| } |
| |
| static void assertTrue(boolean test, String message) { |
| if (!test) { |
| throw new AssertionError(message); |
| } |
| } |
| |
| static void processReferences() { |
| // make JVM process References |
| System.gc(); |
| // help ReferenceHandler thread enqueue References |
| while (TestProxy.Reference_waitForReferenceProcessing()) { } |
| // help run Finalizers |
| System.runFinalization(); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| // 1st create temporary file |
| File file = File.createTempFile("test", ".dat"); |
| try (AutoCloseable acf = () -> { |
| // On Windows, failure to delete file is probably a consequence |
| // of the file still being opened - so the test should fail. |
| assertTrue(file.delete(), |
| "Can't delete: " + file + " (is it still open?)"); |
| }) { |
| try (FileOutputStream out = new FileOutputStream(file)) { |
| out.write(bytes); |
| } |
| |
| // test caching 1t time |
| testCaching(file); |
| |
| processReferences(); |
| |
| // test caching 2nd time - this should only succeed if the stream |
| // is re-opened as a consequence of cleared WeakReference |
| testCaching(file); |
| |
| processReferences(); |
| } |
| } |
| |
| /** |
| * A proxy for (package)private static methods: |
| * sun.security.provider.FileInputStreamPool.getInputStream |
| * java.lang.ref.Reference.waitForReferenceProcessing |
| */ |
| static class TestProxy { |
| private static final Method getInputStreamMethod; |
| private static final Method waitForReferenceProcessingMethod; |
| |
| static { |
| try { |
| Class<?> fileInputStreamPoolClass = |
| Class.forName("sun.security.provider.FileInputStreamPool"); |
| getInputStreamMethod = |
| fileInputStreamPoolClass.getDeclaredMethod( |
| "getInputStream", File.class); |
| getInputStreamMethod.setAccessible(true); |
| |
| waitForReferenceProcessingMethod = |
| Reference.class.getDeclaredMethod("waitForReferenceProcessing"); |
| waitForReferenceProcessingMethod.setAccessible(true); |
| } catch (Exception e) { |
| throw new Error(e); |
| } |
| } |
| |
| static InputStream FileInputStreamPool_getInputStream(File file) |
| throws IOException { |
| try { |
| return (InputStream) getInputStreamMethod.invoke(null, file); |
| } catch (InvocationTargetException e) { |
| Throwable te = e.getTargetException(); |
| if (te instanceof IOException) { |
| throw (IOException) te; |
| } else if (te instanceof RuntimeException) { |
| throw (RuntimeException) te; |
| } else if (te instanceof Error) { |
| throw (Error) te; |
| } else { |
| throw new UndeclaredThrowableException(te); |
| } |
| } catch (IllegalAccessException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| static boolean Reference_waitForReferenceProcessing() { |
| try { |
| return (boolean) waitForReferenceProcessingMethod.invoke(null); |
| } catch (InvocationTargetException e) { |
| Throwable te = e.getTargetException(); |
| if (te instanceof InterruptedException) { |
| return true; |
| } else if (te instanceof RuntimeException) { |
| throw (RuntimeException) te; |
| } else if (te instanceof Error) { |
| throw (Error) te; |
| } else { |
| throw new UndeclaredThrowableException(te); |
| } |
| } catch (IllegalAccessException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| } |