mirror of
https://github.com/revanced/smali.git
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Merged in DebugInfoBuilder.java from the prior dexlib, and fixed it up to work with the new dexlib
git-svn-id: https://smali.googlecode.com/svn/trunk@407 55b6fa8a-2a1e-11de-a435-ffa8d773f76a
This commit is contained in:
JesusFreke@JesusFreke.com
parent
3080fb1bfc
commit
11503ec26e
451
dexlib/src/main/java/org/jf/dexlib/Util/DebugInfoBuilder.java
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451
dexlib/src/main/java/org/jf/dexlib/Util/DebugInfoBuilder.java
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/*
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* [The "BSD licence"]
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* Copyright (c) 2009 Ben Gruver
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.jf.dexlib.Util;
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import org.jf.dexlib.*;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* This class is intended to provide an easy to use container to build up a method's debug info. You can easily add
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* an "event" at a specific address, where an event is something like a line number, start/end local, etc.
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* The events must be added such that the code addresses increase monotonically. This matches how a parser would
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* generally behave, and is intended to increase performance.
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*/
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public class DebugInfoBuilder
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{
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private static final int LINE_BASE = -4;
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private static final int LINE_RANGE = 15;
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private static final int FIRST_SPECIAL = 0x0a;
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private int lineStart = 0;
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private ArrayList<String> parameterNames = new ArrayList<String>();
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private ArrayList<Event> events = new ArrayList<Event>();
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private int lastAddress = 0;
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private boolean hasData;
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private int currentAddress;
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private int currentLine;
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public DebugInfoBuilder() {
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}
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private void checkAddress(int address) {
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if (lastAddress > address) {
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throw new RuntimeException("Cannot add an event with an address before the address of the prior event");
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}
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}
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public void addParameterName(String parameterName) {
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if (parameterName != null) {
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hasData = true;
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}
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parameterNames.add(parameterName);
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}
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public void addLine(int address, int line) {
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hasData = true;
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checkAddress(address);
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if (lineStart == 0) {
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lineStart = line;
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}
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events.add(new LineEvent(address, line));
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}
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public void addLocal(int address, int registerNumber, String localName, String localType) {
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hasData = true;
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checkAddress(address);
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events.add(new StartLocalEvent(address, registerNumber, localName, localType));
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}
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public void addLocalExtended(int address, int registerNumber, String localName, String localType,
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String signature) {
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hasData = true;
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checkAddress(address);
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events.add(new StartLocalExtendedEvent(address, registerNumber, localName, localType, signature));
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}
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public void addEndLocal(int address, int registerNumber) {
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hasData = true;
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checkAddress(address);
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events.add(new EndLocalEvent(address, registerNumber));
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}
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public void addRestartLocal(int address, int registerNumber) {
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hasData = true;
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checkAddress(address);
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events.add(new RestartLocalEvent(address, registerNumber));
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}
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public void addPrologue(int address) {
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hasData = true;
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checkAddress(address);
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events.add(new PrologueEvent(address));
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}
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public void addEpilogue(int address) {
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hasData = true;
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checkAddress(address);
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events.add(new EpilogueEvent(address));
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}
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public void addSetFile(int address, String fileName) {
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hasData = true;
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checkAddress(address);
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events.add(new SetFileEvent(address, fileName));
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}
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public int getParameterNameCount() {
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return parameterNames.size();
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}
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public DebugInfoItem encodeDebugInfo(DexFile dexFile) {
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if (!hasData) {
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return null;
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}
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ByteArrayOutput out = new ByteArrayOutput();
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StringIdItem[] parameterNamesArray = new StringIdItem[parameterNames.size()];
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ArrayList<Item> referencedItems = new ArrayList<Item>();
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if (lineStart == 0) {
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lineStart = 1;
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}
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currentLine = lineStart;
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for (Event event: events) {
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event.emit(dexFile, out, referencedItems);
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}
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emitEndSequence(out);
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int index = 0;
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for (String parameterName: parameterNames) {
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if (parameterName == null) {
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parameterNamesArray[index++] = null;
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} else {
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parameterNamesArray[index++] = StringIdItem.getInternedStringIdItem(dexFile, parameterName);
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}
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}
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Item[] referencedItemsArray = new Item[referencedItems.size()];
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referencedItems.toArray(referencedItemsArray);
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return DebugInfoItem.getInternedDebugInfoItem(dexFile, lineStart, parameterNamesArray, out.getArray(),
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referencedItemsArray);
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}
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private interface Event
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{
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int getAddress();
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void emit(DexFile dexFile, Output out, List<Item> referencedItems);
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}
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private void emitEndSequence(Output out) {
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out.writeByte(0);
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}
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private void emitAdvancePC(Output out, int address) {
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int addressDelta = address-currentAddress;
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if (addressDelta > 0) {
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out.writeByte(1);
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out.writeUnsignedLeb128(addressDelta);
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currentAddress = address;
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}
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}
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private void emitAdvanceLine(Output out, int lineDelta) {
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out.writeByte(2);
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out.writeSignedLeb128(lineDelta);
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}
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private void emitStartLocal(Output out, int registerNum) {
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out.writeByte(3);
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out.writeUnsignedLeb128(registerNum);
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out.writeByte(1);
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out.writeByte(1);
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}
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private void emitStartLocalExtended(Output out, int registerNum) {
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out.writeByte(4);
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out.writeUnsignedLeb128(registerNum);
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out.writeByte(1);
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out.writeByte(1);
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out.writeByte(1);
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}
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private void emitEndLocal(Output out, int registerNum) {
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out.writeByte(5);
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out.writeUnsignedLeb128(registerNum);
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}
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private void emitRestartLocal(Output out, int registerNum) {
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out.writeByte(6);
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out.writeUnsignedLeb128(registerNum);
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}
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private void emitSetPrologueEnd(Output out) {
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out.writeByte(7);
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}
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private void emitSetEpilogueBegin(Output out) {
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out.writeByte(8);
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}
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private void emitSetFile(Output out) {
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out.writeByte(9);
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out.writeByte(1);
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}
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private void emitSpecialOpcode(Output out, byte opcode) {
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out.writeByte(opcode);
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}
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private class LineEvent implements Event
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{
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private final int address;
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private final int line;
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public LineEvent(int address, int line) {
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this.address = address;
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this.line = line;
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}
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public int getAddress() {
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return address;
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}
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public void emit(DexFile dexFile, Output out, List<Item> referencedItems) {
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int lineDelta = line - currentLine;
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int addressDelta = address - currentAddress;
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if (lineDelta < -4 || lineDelta > 10) {
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emitAdvanceLine(out, lineDelta);
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lineDelta = 0;
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}
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if (lineDelta < 2 && addressDelta > 16 || lineDelta > 1 && addressDelta > 15) {
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emitAdvancePC(out, addressDelta);
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addressDelta = 0;
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}
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//TODO: need to handle the case when the line delta is larger than a signed int
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emitSpecialOpcode(out, calculateSpecialOpcode(lineDelta, addressDelta));
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currentAddress = address;
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currentLine = line;
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}
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private byte calculateSpecialOpcode(int lineDelta, int addressDelta) {
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return (byte)(FIRST_SPECIAL + (addressDelta * LINE_RANGE) + (lineDelta - LINE_BASE));
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}
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}
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private class StartLocalEvent implements Event
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{
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private final int address;
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private final int registerNum;
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private final String localName;
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private final String localType;
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public StartLocalEvent(int address, int registerNum, String localName, String localType) {
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this.address = address;
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this.registerNum = registerNum;
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this.localName = localName;
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this.localType = localType;
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}
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public int getAddress() {
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return address;
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}
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public void emit(DexFile dexFile, Output out, List<Item> referencedItems) {
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emitAdvancePC(out, address);
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emitStartLocal(out, registerNum);
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referencedItems.add(localName==null?null:StringIdItem.getInternedStringIdItem(dexFile, localName));
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referencedItems.add(localType==null?null:TypeIdItem.getInternedTypeIdItem(dexFile,
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StringIdItem.getInternedStringIdItem(dexFile, localType)));
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}
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}
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private class StartLocalExtendedEvent implements Event
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{
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private final int address;
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private final int registerNum;
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private final String localName;
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private final String localType;
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private final String signature;
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public StartLocalExtendedEvent(int address, int registerNum, String localName, String localType,
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String signature) {
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this.address = address;
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this.registerNum = registerNum;
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this.localName = localName;
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this.localType = localType;
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this.signature = signature;
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}
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public int getAddress() {
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return address;
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}
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public void emit(DexFile dexFile, Output out, List<Item> referencedItems) {
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emitAdvancePC(out, address);
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emitStartLocalExtended(out, registerNum);
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if (localName != null) {
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referencedItems.add(StringIdItem.getInternedStringIdItem(dexFile, localName));
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}
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if (localType != null) {
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referencedItems.add(TypeIdItem.getInternedTypeIdItem(dexFile,
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StringIdItem.getInternedStringIdItem(dexFile, localType)));
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}
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if (signature != null) {
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referencedItems.add(StringIdItem.getInternedStringIdItem(dexFile, signature));
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}
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}
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}
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private class EndLocalEvent implements Event
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{
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private final int address;
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private final int registerNum;
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public EndLocalEvent(int address, int registerNum) {
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this.address = address;
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this.registerNum = registerNum;
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}
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public int getAddress() {
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return address;
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}
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public void emit(DexFile dexFile, Output out, List<Item> referencedItems) {
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emitAdvancePC(out, address);
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emitEndLocal(out, registerNum);
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}
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}
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private class RestartLocalEvent implements Event
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{
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private final int address;
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private final int registerNum;
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public RestartLocalEvent(int address, int registerNum) {
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this.address = address;
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this.registerNum = registerNum;
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}
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public int getAddress() {
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return address;
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}
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public void emit(DexFile dexFile, Output out, List<Item> referencedItems) {
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emitAdvancePC(out, address);
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emitRestartLocal(out, registerNum);
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}
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}
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private class PrologueEvent implements Event
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{
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private final int address;
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public PrologueEvent(int address) {
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this.address = address;
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}
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public int getAddress() {
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return address;
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}
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public void emit(DexFile dexFile, Output out, List<Item> referencedItems) {
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emitAdvancePC(out, address);
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emitSetPrologueEnd(out);
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}
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}
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private class EpilogueEvent implements Event
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{
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private final int address;
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public EpilogueEvent(int address) {
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this.address = address;
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}
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public int getAddress() {
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return address;
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}
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public void emit(DexFile dexFile, Output out, List<Item> referencedItems) {
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emitAdvancePC(out, address);
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emitSetEpilogueBegin(out);
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}
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}
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private class SetFileEvent implements Event
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{
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private final int address;
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private final String fileName;
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public SetFileEvent(int address, String fileName) {
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this.address = address;
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this.fileName = fileName;
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}
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public int getAddress() {
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return address;
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}
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public void emit(DexFile dexFile, Output out, List<Item> referencedItems) {
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emitAdvancePC(out, address);
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emitSetFile(out);
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if (fileName != null) {
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referencedItems.add(StringIdItem.getInternedStringIdItem(dexFile, fileName));
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}
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}
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}
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}
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