1 /*
   2  * Copyright (c) 2016, 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 package jdk.tools.jaotc.binformat;
  25 
  26 import jdk.tools.jaotc.binformat.Symbol.Binding;
  27 import jdk.tools.jaotc.binformat.Symbol.Kind;
  28 import jdk.tools.jaotc.jnilibelf.ELFContainer;
  29 
  30 import java.io.ByteArrayOutputStream;
  31 import java.nio.ByteBuffer;
  32 import java.nio.ByteOrder;
  33 import java.util.Arrays;
  34 
  35 /**
  36  * Base class that represents content of all sections with byte-level granularity. The ByteContainer
  37  * class is backed by a ByteArrayOutputStream. This class supports writing all desired byte content
  38  * to the container using the method {@code appendBytes} and accessing the byte array using the
  39  * method {@code getByteArray}.
  40  *
  41  * The method {@code putIntAt} updates the content of {@code contentBytes}. Changes are not
  42  * reflected in {@code contentStream}.
  43  */
  44 public class ByteContainer implements ELFContainer {
  45     /**
  46      * {@code ByteBuffer} representation of {@code BinaryContainer}.
  47      */
  48     private ByteBuffer contentBytes;
  49 
  50     /**
  51      * {@code ByteArrayoutputStream} to which all appends are done.
  52      */
  53     private ByteArrayOutputStream contentStream;
  54 
  55     /**
  56      * Boolean to indicate if contentBytes was modified.
  57      */
  58     private boolean bufferModified;
  59 
  60     /**
  61      * Boolean to indicate if this section contains any relocations.
  62      */
  63     private boolean hasRelocations;
  64 

   1 /*
   2  * Copyright (c) 2016, 2017, 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 package jdk.tools.jaotc.binformat;
  25 
  26 import jdk.tools.jaotc.binformat.Symbol.Binding;
  27 import jdk.tools.jaotc.binformat.Symbol.Kind;
  28 import jdk.tools.jaotc.binformat.Container;
  29 
  30 import java.io.ByteArrayOutputStream;
  31 import java.nio.ByteBuffer;
  32 import java.nio.ByteOrder;
  33 import java.util.Arrays;
  34 
  35 /**
  36  * Base class that represents content of all sections with byte-level granularity. The ByteContainer
  37  * class is backed by a ByteArrayOutputStream. This class supports writing all desired byte content
  38  * to the container using the method {@code appendBytes} and accessing the byte array using the
  39  * method {@code getByteArray}.
  40  *
  41  * The method {@code putIntAt} updates the content of {@code contentBytes}. Changes are not
  42  * reflected in {@code contentStream}.
  43  */
  44 public class ByteContainer implements Container {
  45     /**
  46      * {@code ByteBuffer} representation of {@code BinaryContainer}.
  47      */
  48     private ByteBuffer contentBytes;
  49 
  50     /**
  51      * {@code ByteArrayoutputStream} to which all appends are done.
  52      */
  53     private ByteArrayOutputStream contentStream;
  54 
  55     /**
  56      * Boolean to indicate if contentBytes was modified.
  57      */
  58     private boolean bufferModified;
  59 
  60     /**
  61      * Boolean to indicate if this section contains any relocations.
  62      */
  63     private boolean hasRelocations;
  64