071bd521bc
Reviewed-by: alanb, bchristi, dcubed, dfuchs, eosterlund, erikj, glaubitz, ihse, iignatyev, jjiang, kbarrett, ksrini, kvn, naoto, prr, rriggs, serb, sspitsyn, stefank, tschatzl, valeriep, weijun, weijun
103 lines
3.5 KiB
Java
103 lines
3.5 KiB
Java
/*
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* Copyright (c) 2001, 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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@bug 4452020 4629048 4638365 4869859
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* @summary Test FileChannel scattering reads
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* @run main/othervm ScatteringRead
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*/
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import java.nio.channels.*;
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import java.nio.*;
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import java.io.*;
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public class ScatteringRead {
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private static final int NUM_BUFFERS = 3;
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private static final int BUFFER_CAP = 3;
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private static final int BIG_BUFFER_CAP = Integer.MAX_VALUE / 3 + 10;
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public static void main(String[] args) throws Exception {
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test1(); // for bug 4452020
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test2(); // for bug 4629048
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System.gc();
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}
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private static void test1() throws Exception {
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ByteBuffer dstBuffers[] = new ByteBuffer[NUM_BUFFERS];
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for (int i=0; i<NUM_BUFFERS; i++)
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dstBuffers[i] = ByteBuffer.allocateDirect(BUFFER_CAP);
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File blah = File.createTempFile("blah1", null);
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blah.deleteOnExit();
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createTestFile(blah);
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FileInputStream fis = new FileInputStream(blah);
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FileChannel fc = fis.getChannel();
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byte expectedResult = -128;
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for (int k=0; k<20; k++) {
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long bytesRead = fc.read(dstBuffers);
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for (int i=0; i<NUM_BUFFERS; i++) {
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for (int j=0; j<BUFFER_CAP; j++) {
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byte b = dstBuffers[i].get(j);
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if (b != expectedResult++)
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throw new RuntimeException("Test failed");
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}
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dstBuffers[i].flip();
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}
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}
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fis.close();
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}
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private static void createTestFile(File blah) throws Exception {
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FileOutputStream fos = new FileOutputStream(blah);
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for(int i=-128; i<128; i++)
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fos.write((byte)i);
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fos.flush();
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fos.close();
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}
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private static void test2() throws Exception {
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ByteBuffer dstBuffers[] = new ByteBuffer[2];
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for (int i=0; i<2; i++)
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dstBuffers[i] = ByteBuffer.allocateDirect(10);
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File blah = File.createTempFile("blah2", null);
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blah.deleteOnExit();
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FileOutputStream fos = new FileOutputStream(blah);
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for(int i=0; i<15; i++)
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fos.write((byte)92);
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fos.flush();
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fos.close();
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FileInputStream fis = new FileInputStream(blah);
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FileChannel fc = fis.getChannel();
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long bytesRead = fc.read(dstBuffers);
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if (dstBuffers[1].limit() != 10)
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throw new Exception("Scattering read changed buf limit.");
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fis.close();
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}
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}
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