--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/io/FileDescriptor/Finalize.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,258 @@
+/*
+ * Copyright (c) 2006, 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 6322678
+ * @summary Test for making sure that FIS/FOS.finalize() will
+ * not disturb the FD that is still in use.
+ */
+
+import java.io.*;
+import java.nio.*;
+import java.nio.channels.*;
+
+public class Finalize {
+
+ static byte data[] = new byte[] {48, 49, 50, 51, 52, 53, 54, 55, 56, 57,};
+ static String inFileName = "fd-in-test.txt";
+ static String outFileName = "fd-out-test.txt";
+ static File inFile;
+ static File outFile;
+
+ public static void main(String[] args)
+ throws Exception {
+ Thread.sleep(5000);
+
+ inFile= new File(System.getProperty("test.dir", "."),
+ inFileName);
+ inFile.createNewFile();
+ inFile.deleteOnExit();
+ writeToInFile();
+
+ doFileInputStream();
+
+ outFile = new File(System.getProperty("test.dir", "."),
+ outFileName);
+ outFile.createNewFile();
+ outFile.deleteOnExit();
+
+ doFileOutputStream();
+ doRandomAccessFile();
+ doFileChannel();
+ }
+
+ private static void doFileInputStream() throws Exception {
+
+ /* Create initial FIS for file */
+ FileInputStream fis1 = new FileInputStream(inFile);
+
+ /* Get the FileDescriptor from the fis */
+ FileDescriptor fd = fis1.getFD();
+
+ /*
+ * Create a new FIS based on the existing FD
+ * (so the two FIS's share the same native fd)
+ */
+ FileInputStream fis2 = new FileInputStream(fd);
+
+ /* allow fis1 to be gc'ed */
+ fis1 = null;
+ int ret = 0;
+
+ /* encourage gc */
+ System.gc();
+ Thread.sleep(200);
+
+ while((ret = fis2.read()) != -1 ) {
+ /*
+ * read from fis2 - when fis1 is gc'ed and finalizer is run,
+ * read should not fail
+ */
+ System.out.println("read from fis2:" + ret);
+ }
+ fis2.close();
+ }
+
+ private static void writeToInFile() throws IOException {
+ FileOutputStream out = new FileOutputStream(inFile);
+ out.write(data);
+ out.close();
+ }
+
+ private static void doFileOutputStream()
+ throws Exception {
+
+ System.out.println("--------FileOutputStream Test Started----------");
+
+ /*Create initial FIS for file */
+ FileOutputStream fos1 = new FileOutputStream(outFile);
+
+ /* Get the FileDescriptor from the fos */
+ FileDescriptor fd = fos1.getFD();
+ FileOutputStream fos2 = new FileOutputStream(fd);
+
+ /* allow fos1 to be gc'ed */
+ fos1 = null;
+
+ /* encourage gc */
+ System.gc();
+ Thread.sleep(200);
+
+ /*
+ * write to fos2 - when fos1 is gc'ed and finalizer is run,
+ * write to fos2 should not fail
+ */
+ fos2.write(data);
+ System.out.println("wrote:" + data.length + " bytes to fos2");
+ fos2.close();
+
+ System.out.println("--------FileOutputStream Test Over----------");
+ System.out.println();
+ }
+
+
+ private static void doRandomAccessFile()
+ throws Exception {
+
+ System.out.println("--------RandomAccessFile Read Test Started----------");
+
+ // Create initial FIS for file
+ RandomAccessFile raf = new RandomAccessFile(inFile, "r");
+
+ /* Get the FileDescriptor from the fis */
+ FileDescriptor fd = raf.getFD();
+
+ /* Create a new FIS based on the existing FD
+ * (so the two FIS's share the same native fd)
+ */
+ FileInputStream fis = new FileInputStream(fd);
+
+ /* allow fis to be gc'ed */
+ fis = null;
+ int ret = 0;
+
+ /* encourage gc */
+ System.gc();
+ Thread.sleep(50);
+
+ /*
+ * read from raf - when fis is gc'ed and finalizer is run,
+ * read from raf should not fail
+ */
+ while((ret = raf.read()) != -1 ) {
+ System.out.println("read from raf:" + ret);
+ }
+ raf.close();
+ Thread.sleep(200);
+
+ System.out.println("--------RandomAccessFile Write Test Started----------");
+ System.out.println();
+
+ raf = new RandomAccessFile(outFile, "rw");
+ fd = raf.getFD();
+ FileOutputStream fos = new FileOutputStream(fd);
+
+ /* allow fos to be gc'ed */
+ fos = null;
+
+ /* encourage gc */
+ System.gc();
+ Thread.sleep(200);
+
+ /*
+ * write to raf - when fos is gc'ed and finalizer is run,
+ * write to raf should not fail
+ */
+ raf.write(data);
+ System.out.println("wrote:" + data.length + " bytes to raf");
+ raf.close();
+
+ System.out.println("--------RandomAccessFile Write Test Over----------");
+ System.out.println();
+ }
+
+ private static void doFileChannel() throws Exception {
+
+ System.out.println("--------FileChannel Read Test Started----------");
+ System.out.println();
+
+ FileInputStream fis1 = new FileInputStream(inFile);
+
+ /* Get the FileDescriptor from the fis */
+ FileDescriptor fd = fis1.getFD();
+
+ /* Create a new FIS based on the existing FD
+ * (so the two FIS's share the same native fd)
+ */
+ FileInputStream fis2 = new FileInputStream(fd);
+ FileChannel fc2 = fis2.getChannel();
+
+ /**
+ * Encourage the GC
+ */
+ fis1 = null;
+ System.gc();
+ Thread.sleep(200);
+
+ int ret = 1;
+ ByteBuffer bb = ByteBuffer.allocateDirect(1);
+ ret = fc2.read(bb);
+ System.out.println("read " + ret + " bytes from fc2:");
+ fc2.close();
+
+ System.out.println("--------FileChannel Read Test Over----------");
+ System.out.println();
+
+ System.out.println("--------FileChannel Write Test Started----------");
+
+ FileOutputStream fos1 = new FileOutputStream(outFile);
+
+ /* Get the FileDescriptor from the fos */
+ fd = fos1.getFD();
+ FileOutputStream fos2 = new FileOutputStream(fd);
+ fc2 = fos2.getChannel();
+
+ /**
+ * Encourage the GC
+ */
+ fos1 = null;
+ System.gc();
+ Thread.sleep(200);
+
+ /*
+ * write to fc2 - when fos1 is gc'ed and finalizer is run,
+ * write to fc2 should not fail
+ */
+ bb = ByteBuffer.allocateDirect(data.length)
+ .put(data)
+ .flip();
+
+ ret = fc2.write(bb);
+ System.out.println("Wrote:" + ret + " bytes to fc2");
+ fc2.close();
+
+ System.out.println("--------Channel Write Test Over----------");
+ }
+}