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/*
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* Copyright (c) 2015, 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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/*
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* Test reading resource content.
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* @test ImageReadTest
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* @summary Unit test for JVM_ImageRead() method
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* @library /testlibrary /../../test/lib
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* @build LocationConstants ImageReadTest
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* @run main ClassFileInstaller sun.hotspot.WhiteBox
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* sun.hotspot.WhiteBox$WhiteBoxPermission
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+MemoryMapImage ImageReadTest +
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:-MemoryMapImage ImageReadTest -
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*/
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import java.io.File;
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import java.nio.ByteBuffer;
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import sun.hotspot.WhiteBox;
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import static jdk.test.lib.Asserts.*;
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public class ImageReadTest implements LocationConstants {
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public static final WhiteBox wb = WhiteBox.getWhiteBox();
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public static void main(String... args) throws Exception {
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String javaHome = System.getProperty("java.home");
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String imageFile = javaHome + File.separator + "lib"
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+ File.separator + "modules" + File.separator
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+ "bootmodules.jimage";
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if (!(new File(imageFile)).exists()) {
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System.out.printf("Test skipped.");
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return;
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}
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boolean isMMap = args[0].equals("+");
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long id = wb.imageOpenImage(imageFile, isMMap);
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final String mm = isMMap ? "-XX:+MemoryMapImage" : "-XX:-MemoryMapImage";
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final int magic = 0xCAFEBABE;
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String className = "/java.base/java/lang/String.class";
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long[] offsetArr = wb.imageFindAttributes(id, className.getBytes());
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long offset = offsetArr[LOCATION_ATTRIBUTE_OFFSET];
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long size = offsetArr[LOCATION_ATTRIBUTE_UNCOMPRESSED];
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// positive: read
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ByteBuffer buf = ByteBuffer.allocateDirect((int) size);
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assertTrue(wb.imageRead(id, offset, buf, size), "Failed. Read operation returned false, should be true");
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int m = buf.getInt();
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assertTrue(m == magic, "Failed. Read operation returned true but wrong magic = " + magic);
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// positive: mmap
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if (isMMap) {
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long dataAddr = wb.imageGetDataAddress(id);
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assertFalse(dataAddr == 0L, "Failed. Did not obtain data address on mmapped test");
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int data = wb.imageGetIntAtAddress(dataAddr, (int) offset, true);
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assertTrue(data == magic, "Failed. MMap operation returned true but wrong magic = " + data);
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}
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// negative: wrong offset
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boolean success = wb.imageRead(id, -100, buf, size);
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assertFalse(success, "Failed. Read operation (wrong offset): returned true");
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// negative: too big offset
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long filesize = new File(imageFile).length();
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success = wb.imageRead(id, filesize + 1, buf, size);
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assertFalse(success, "Failed. Read operation (offset > file size) returned true");
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// negative: negative size
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success = wb.imageRead(id, offset, buf, -100);
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assertFalse(success, "Failed. Read operation (negative size) returned true");
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wb.imageCloseImage(id);
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}
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}
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