531 lines
15 KiB
Java
531 lines
15 KiB
Java
/*
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* Copyright (c) 2006, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: SectionMoteMemory.java,v 1.2 2006/08/23 15:48:15 fros4943 Exp $
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*/
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package se.sics.cooja;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.*;
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import org.apache.log4j.Logger;
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import se.sics.cooja.MoteMemory;
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/**
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* Represents a mote memory consisting of non-overlapping memory sections. This
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* memory also contains information about variable starts addresses.
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* <p>
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* When an unhandled memory segment is set a new section is automatically
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* created for this segment.
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* <p>
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*
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* @author Fredrik Osterlind
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*/
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public class SectionMoteMemory implements MoteMemory {
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private static Logger logger = Logger.getLogger(SectionMoteMemory.class);
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private Vector<MoteMemorySection> sections = new Vector<MoteMemorySection>();
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private final Properties variableAddresses;
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/**
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* Create a new mote memory with information about which variables exist and
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* their relative memory addresses.
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*
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* @param variableAddresses
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* Variable addresses
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*/
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public SectionMoteMemory(Properties variableAddresses) {
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this.variableAddresses = variableAddresses;
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}
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/**
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* @return All variable names known and residing in this memory
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*/
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public String[] getVariableNames() {
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String[] names = new String[variableAddresses.size()];
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Enumeration nameEnum = variableAddresses.keys();
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for (int i = 0; i < variableAddresses.size(); i++) {
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names[i] = (String) nameEnum.nextElement();
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}
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return names;
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}
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public void clearMemory() {
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sections.clear();
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}
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public byte[] getMemorySegment(int address, int size) {
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for (MoteMemorySection section : sections) {
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if (section.includesAddr(address)
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&& section.includesAddr(address + size - 1)) {
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return section.getMemorySegment(address, size);
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}
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}
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return null;
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}
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public void setMemorySegment(int address, byte[] data) {
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// TODO Creating overlapping memory sections possible
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for (MoteMemorySection section : sections) {
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if (section.includesAddr(address)
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&& section.includesAddr(address + data.length - 1)) {
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section.setMemorySegment(address, data);
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return;
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}
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}
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sections.add(new MoteMemorySection(address, data));
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}
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public int getTotalSize() {
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int totalSize = 0;
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for (MoteMemorySection section : sections)
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totalSize += section.getSize();
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return totalSize;
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}
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/**
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* Returns the total number of sections in this memory.
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*
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* @return Number of sections
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*/
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public int getNumberOfSections() {
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return sections.size();
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}
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/**
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* Removes a memory segment from this memory. The section containing the
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* segment may be split into two sections.
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*
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* @param startAddr
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* Start address
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* @param size
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* Length
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*/
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public void removeSegmentFromMemory(int startAddr, int size) {
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for (MoteMemorySection section : sections)
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// Find section containing segment to remove
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if (section.includesAddr(startAddr)
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&& section.includesAddr(startAddr + size - 1)) {
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MoteMemorySection oldSection = section;
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byte[] dataFirstPart = oldSection.getMemorySegment(
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oldSection.startAddr, (int) (startAddr - oldSection.startAddr));
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byte[] dataSecondPart = oldSection
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.getMemorySegment(startAddr + size, (int) (oldSection.startAddr
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+ oldSection.getSize() - (startAddr + size)));
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MoteMemorySection newSectionFirstPart = new MoteMemorySection(
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oldSection.startAddr, dataFirstPart);
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MoteMemorySection newSectionSecondPart = new MoteMemorySection(
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startAddr + size, dataSecondPart);
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// Remove old section, add new sections
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sections.remove(oldSection);
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if (newSectionFirstPart.getSize() > 0)
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sections.add(newSectionFirstPart);
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if (newSectionSecondPart.getSize() > 0)
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sections.add(newSectionSecondPart);
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}
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}
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/**
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* Get start address of section at given position.
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*
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* @param sectionNr
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* Section position
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* @return Start address of section
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*/
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public int getStartAddrOfSection(int sectionNr) {
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if (sectionNr >= sections.size())
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return 0;
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return sections.elementAt(sectionNr).getStartAddr();
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}
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/**
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* Get size of section at given position.
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*
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* @param sectionNr
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* Section position
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* @return Size of section
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*/
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public int getSizeOfSection(int sectionNr) {
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if (sectionNr >= sections.size())
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return 0;
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return sections.elementAt(sectionNr).getSize();
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}
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/**
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* Get data of section at given position.
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*
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* @param sectionNr
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* Section position
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* @return Data at section
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*/
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public byte[] getDataOfSection(int sectionNr) {
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if (sectionNr >= sections.size())
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return null;
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return sections.elementAt(sectionNr).getData();
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}
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/**
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* Returns a value of the integer variable with the given name.
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*
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* @param varName
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* Name of integer variable
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* @return Value of integer variable
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*/
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public int getIntValueOf(String varName) {
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// Get start address of variable
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if (!variableAddresses.containsKey(varName))
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return -1;
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int varAddr = ((Integer) variableAddresses.get(varName)).intValue();
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byte[] varData = getMemorySegment(varAddr, 4);
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int retVal = 0;
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int pos = 0;
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retVal += ((int) (varData[pos++] & 0xFF)) << 24;
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retVal += ((int) (varData[pos++] & 0xFF)) << 16;
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retVal += ((int) (varData[pos++] & 0xFF)) << 8;
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retVal += ((int) (varData[pos++] & 0xFF)) << 0;
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// TODO Check if small/big-endian when coming from JNI?
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retVal = Integer.reverseBytes(retVal);
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return retVal;
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}
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/**
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* Set integer value of variable with given name.
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*
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* @param varName
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* Name of integer variable
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* @param newVal
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* New value to set
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*/
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public void setIntValueOf(String varName, int newVal) {
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// Get start address of variable
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if (!variableAddresses.containsKey(varName))
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return;
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int varAddr = ((Integer) variableAddresses.get(varName)).intValue();
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// TODO Check if small/big-endian when coming from JNI?
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int newValToSet = Integer.reverseBytes(newVal);
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// Create byte array
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int pos = 0;
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byte[] varData = new byte[4];
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varData[pos++] = (byte) ((newValToSet & 0xFF000000) >> 24);
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varData[pos++] = (byte) ((newValToSet & 0xFF0000) >> 16);
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varData[pos++] = (byte) ((newValToSet & 0xFF00) >> 8);
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varData[pos++] = (byte) ((newValToSet & 0xFF) >> 0);
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setMemorySegment(varAddr, varData);
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}
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/**
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* Returns a value of the byte variable with the given name.
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*
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* @param varName
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* Name of byte variable
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* @return Value of byte variable
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*/
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public byte getByteValueOf(String varName) {
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// Get start address of variable
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if (!variableAddresses.containsKey(varName))
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return -1;
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int varAddr = ((Integer) variableAddresses.get(varName)).intValue();
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byte[] varData = getMemorySegment(varAddr, 1);
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return varData[0];
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}
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/**
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* Set byte value of variable with given name.
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*
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* @param varName
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* Name of byte variable
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* @param newVal
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* New value to set
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*/
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public void setByteValueOf(String varName, byte newVal) {
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// Get start address of variable
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if (!variableAddresses.containsKey(varName))
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return;
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int varAddr = ((Integer) variableAddresses.get(varName)).intValue();
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byte[] varData = new byte[1];
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varData[0] = newVal;
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setMemorySegment(varAddr, varData);
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}
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/**
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* Returns byte array of given length and with the given name.
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*
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* @param varName
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* Name of array
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* @param length
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* Length of array
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* @return Data of array
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*/
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public byte[] getByteArray(String varName, int length) {
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// Get start address of variable
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if (!variableAddresses.containsKey(varName))
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return null;
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int varAddr = ((Integer) variableAddresses.get(varName)).intValue();
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// TODO Check if small/big-endian when coming from JNI?
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return getMemorySegment(varAddr, length);
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}
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/**
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* Set byte array of the variable with the given name.
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*
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* @param varName
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* Name of array
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* @param data
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* New data of array
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*/
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public void setByteArray(String varName, byte[] data) {
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// Get start address of variable
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if (!variableAddresses.containsKey(varName))
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return;
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int varAddr = ((Integer) variableAddresses.get(varName)).intValue();
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// TODO Check if small/big-endian when coming from JNI?
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setMemorySegment(varAddr, data);
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}
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/**
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* A memory section represented of a byte array and a start address.
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*
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* @author Fredrik Osterlind
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*/
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private class MoteMemorySection {
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private byte[] data = null;
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private int startAddr;
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/**
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* Create a new memory section.
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*
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* @param startAddr
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* Start address of section
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* @param data
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* Data of section
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*/
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public MoteMemorySection(int startAddr, byte[] data) {
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this.startAddr = startAddr;
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this.data = data;
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}
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/**
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* Returns start address of this memory section.
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*
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* @return Start address
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*/
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public int getStartAddr() {
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return startAddr;
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}
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/**
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* Returns size of this memory section.
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*
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* @return Size
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*/
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public int getSize() {
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return data.length;
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}
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/**
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* Returns the entire byte array which defines this section.
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*
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* @return Byte array
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*/
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public byte[] getData() {
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return data;
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}
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/**
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* True if given address is part of this memory section.
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*
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* @param addr
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* Address
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* @return True if given address is part of this memory section, false
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* otherwise
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*/
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public boolean includesAddr(int addr) {
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if (data == null)
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return false;
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return (addr >= startAddr && addr < (startAddr + data.length));
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}
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/**
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* Returns memory segment.
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*
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* @param addr
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* Start address of memory segment
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* @param size
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* Size of memory segment
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* @return Memory segment
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*/
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public byte[] getMemorySegment(int addr, int size) {
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byte[] ret = new byte[size];
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System.arraycopy(data, addr - startAddr, ret, 0, size);
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return ret;
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}
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/**
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* Sets a memory segment.
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*
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* @param addr
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* Start of memory segment
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* @param data
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* Data of memory segment
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*/
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public void setMemorySegment(int addr, byte[] data) {
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System.arraycopy(data, 0, this.data, addr - startAddr, data.length);
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}
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public MoteMemorySection clone() {
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byte[] dataClone = new byte[data.length];
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System.arraycopy(data, 0, dataClone, 0, data.length);
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MoteMemorySection clone = new MoteMemorySection(startAddr, dataClone);
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return clone;
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}
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}
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// EXPERIMENTAL AND DEBUG METHODS
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public SectionMoteMemory clone() {
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Vector<MoteMemorySection> clonedSections = new Vector<MoteMemorySection>();
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for (MoteMemorySection section : sections) {
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clonedSections.add(section.clone());
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}
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SectionMoteMemory clone = new SectionMoteMemory(variableAddresses);
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clone.sections = clonedSections;
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return clone;
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}
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protected byte[] getChecksum() {
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MessageDigest messageDigest;
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try {
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messageDigest = MessageDigest.getInstance("MD5");
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for (MoteMemorySection section : sections) {
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messageDigest.update(section.data, 0, section.getSize());
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}
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} catch (NoSuchAlgorithmException e) {
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return null;
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}
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return messageDigest.digest();
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}
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protected Vector<Integer> getDifferenceAddressesOf(
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SectionMoteMemory anotherMem) {
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Vector<Integer> differences = new Vector<Integer>();
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if (this.getNumberOfSections() != anotherMem.getNumberOfSections()) {
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logger.fatal("Number of section do not match!");
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return null;
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}
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for (int i = 0; i < sections.size(); i++) {
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if (this.getSizeOfSection(i) != anotherMem.getSizeOfSection(i)) {
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logger.fatal("Section " + i + " sizes do not match!");
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return null;
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}
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if (this.getStartAddrOfSection(i) != anotherMem.getStartAddrOfSection(i)) {
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logger.fatal("Section " + i + " start addresses do not match!");
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return null;
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}
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for (int j = 0; j < sections.get(i).getSize(); j++)
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if (this.sections.get(i).data[j] != anotherMem.getDataOfSection(i)[j])
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differences.add(new Integer(sections.get(i).startAddr + j));
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System.err.println();
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}
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return differences;
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}
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protected void printMemory() {
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for (int i = 0; i < sections.size(); i++) {
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System.err.print("Section[" + i + "]: ");
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for (int j = 0; j < sections.get(i).getSize(); j++)
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System.err.print(sections.get(i).getData()[j] + ",");
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System.err.println();
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}
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}
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protected void printDifferences(SectionMoteMemory anotherMem) {
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if (this.getNumberOfSections() != anotherMem.getNumberOfSections()) {
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logger.fatal("Number of section do not match!");
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return;
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}
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for (int i = 0; i < sections.size(); i++) {
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if (this.getSizeOfSection(i) != anotherMem.getSizeOfSection(i)) {
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logger.fatal("Section " + i + " sizes do not match!");
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return;
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}
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if (this.getStartAddrOfSection(i) != anotherMem.getStartAddrOfSection(i)) {
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logger.fatal("Section " + i + " start addresses do not match!");
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return;
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}
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System.err.print("Section[" + i + "]: ");
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for (int j = 0; j < sections.get(i).getSize(); j++)
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if (this.sections.get(i).data[j] != anotherMem.getDataOfSection(i)[j])
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System.err.print(j + ",");
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System.err.println();
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}
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}
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protected void printChecksum() {
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byte[] checksum = this.getChecksum();
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System.err.print("Checksum: ");
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for (int i = 0; i < checksum.length; i++) {
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System.err.print(checksum[i] + ",");
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}
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System.err.println();
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}
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}
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