1 /*

     2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    24 

    25 /*

    26  * @test

    27  * @summary Corrupt the header CRC fields of the top archive. VM should exit with an error.

    28  * @requires vm.cds

    29  * @library /test/lib /test/hotspot/jtreg/runtime/appcds /test/hotspot/jtreg/runtime/appcds/test-classes

    30  * @build Hello sun.hotspot.WhiteBox

    31  * @run driver ClassFileInstaller -jar hello.jar Hello

    32  * @run driver ClassFileInstaller sun.hotspot.WhiteBox

    33  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI ArchiveConsistency

    34  */

    35 

    36 import java.io.File;

    37 import java.io.IOException;

    38 import java.nio.ByteBuffer;

    39 import java.nio.ByteOrder;

    40 import java.nio.channels.FileChannel;

    41 import java.nio.file.StandardOpenOption;

    42 import static java.nio.file.StandardOpenOption.READ;

    43 import static java.nio.file.StandardOpenOption.WRITE;

    44 import java.util.ArrayList;

    45 import java.util.HashSet;

    46 import java.util.List;

    47 import sun.hotspot.WhiteBox;

    48 

    49 public class ArchiveConsistency extends DynamicArchiveTestBase {

    50     public static WhiteBox wb;

    51     public static int int_size;        // size of int

    52     public static String[] shared_region_name = {"MiscCode", "ReadWrite", "ReadOnly", "MiscData"};

    53     public static int num_regions = shared_region_name.length;

    54 

    55     public static void main(String[] args) throws Exception {

    56         runTest(ArchiveConsistency::testCustomBase);

    57     }

    58 

    59     // Test with custom base archive + top archive

    60     static void testCustomBase() throws Exception {

    61         String topArchiveName = getNewArchiveName("top2");

    62         String baseArchiveName = getNewArchiveName("base");

    63         dumpBaseArchive(baseArchiveName);

    64         doTest(baseArchiveName, topArchiveName);

    65     }

    66 

    67     public static void setReadWritePermission(File file) throws Exception {

    68         if (!file.canRead()) {

    69             if (!file.setReadable(true)) {

    70                 throw new IOException("Cannot modify file " + file + " as readable");

    71             }

    72         }

    73         if (!file.canWrite()) {

    74             if (!file.setWritable(true)) {

    75                 throw new IOException("Cannot modify file " + file + " as writable");

    76             }

    77         }

    78     }

    79 

    80     public static long readInt(FileChannel fc, long offset, int nbytes) throws Exception {

    81         ByteBuffer bb = ByteBuffer.allocate(nbytes);

    82         bb.order(ByteOrder.nativeOrder());

    83         fc.position(offset);

    84         fc.read(bb);

    85         return  (nbytes > 4 ? bb.getLong(0) : bb.getInt(0));

    86     }

    87 

    88     public static long align_up_page(long l) throws Exception {

    89         // wb is obtained in getFileOffsetInfo() which is called first in main() else we should call

    90         // WhiteBox.getWhiteBox() here first.

    91         int pageSize = wb.getVMPageSize();

    92         return (l + pageSize -1) & (~ (pageSize - 1));

    93     }

    94 

    95     public static void writeData(FileChannel fc, long offset, ByteBuffer bb) throws Exception {

    96         fc.position(offset);

    97         fc.write(bb);

    98         fc.force(true);

    99     }

   100 

   101     public static FileChannel getFileChannel(File jsa) throws Exception {

   102         List<StandardOpenOption> arry = new ArrayList<StandardOpenOption>();

   103         arry.add(READ);

   104         arry.add(WRITE);

   105         return FileChannel.open(jsa.toPath(), new HashSet<StandardOpenOption>(arry));

   106     }

   107 

   108    public static void modifyJsaHeaderCRC(File jsa) throws Exception {

   109         FileChannel fc = getFileChannel(jsa);

   110         int_size = wb.getOffsetForName("int_size");

   111         System.out.println("    int_size " + int_size);

   112         ByteBuffer bbuf = ByteBuffer.allocateDirect(int_size);

   113         for (int i = 0; i < int_size; i++) {

   114             bbuf.put((byte)0);

   115         }

   116 

   117         int baseArchiveCRCOffset = wb.getOffsetForName("DynamicArchiveHeader::_base_archive_crc");

   118         int crc = 0;

   119         System.out.printf("%-12s%-12s\n", "Space name", "CRC");

   120         for (int i = 0; i < 4; i++) {

   121             baseArchiveCRCOffset += int_size * i;

   122             System.out.println("    baseArchiveCRCOffset " + baseArchiveCRCOffset);

   123             crc = (int)readInt(fc, baseArchiveCRCOffset, int_size );

   124             System.out.printf("%-11s%-12d\n", shared_region_name[i], crc);

   125             bbuf.rewind();

   126             writeData(fc, baseArchiveCRCOffset, bbuf);

   127         }

   128         fc.force(true);

   129         if (fc.isOpen()) {

   130             fc.close();

   131         }

   132     }

   133 

   134     private static void doTest(String baseArchiveName, String topArchiveName) throws Exception {

   135         String appJar = ClassFileInstaller.getJarPath("hello.jar");

   136         String mainClass = "Hello";

   137         dump2(baseArchiveName, topArchiveName,

   138              "-Xlog:cds",

   139              "-Xlog:cds+dynamic=debug",

   140              "-cp", appJar, mainClass)

   141             .assertNormalExit(output -> {

   142                     output.shouldContain("Buffer-space to target-space delta")

   143                           .shouldContain("Written dynamic archive 0x");

   144                 });

   145 

   146         File jsa = new File(topArchiveName);

   147         if (!jsa.exists()) {

   148             throw new IOException(jsa + " does not exist!");

   149         }

   150 

   151         // Modify the CRC values in the header of the top archive.

   152         wb = WhiteBox.getWhiteBox();

   153         setReadWritePermission(jsa);

   154         modifyJsaHeaderCRC(jsa);

   155 

   156         run2(baseArchiveName, topArchiveName,

   157             "-Xlog:class+load",

   158             "-Xlog:cds+dynamic=debug,cds=debug",

   159             "-XX:+VerifySharedSpaces",

   160             "-cp", appJar, mainClass)

   161             .assertAbnormalExit(output -> {

   162                     output.shouldContain("Header checksum verification failed")

   163                           .shouldContain("Unable to use shared archive")

   164                           .shouldHaveExitValue(1);

   165                 });

   166     }

   167 }