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Dragome SDK module: bytecode to javascript compiler
/*******************************************************************************
* Copyright (c) 2011-2014 Fernando Petrola
*
* This file is part of Dragome SDK.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the GNU Public License v3.0
* which accompanies this distribution, and is available at
* http://www.gnu.org/licenses/gpl.html
******************************************************************************/
// Copyright 2011 The j2js Authors. All Rights Reserved.
//
// This file is part of j2js.
//
// j2js is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// j2js is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with j2js. If not, see tryStatements= new ArrayList();
private ControlFlowGraph graph= new ControlFlowGraph(tryStatements);
private int depth;
private static Log logger= Log.getLogger();
private boolean wide= false;
public static ASTNode getCurrentNode()
{
return currentNode;
}
public Pass1(JavaClass jc)
{
constantPool= jc.getConstantPool();
loopFound= false;
}
private CatchClause createCatchClause(TryStatement tryStmt, ExceptionHandler handle)
{
CatchClause cStmt= new CatchClause(handle.getHandlerPC());
VariableDeclaration decl= new VariableDeclaration(VariableDeclaration.LOCAL_PARAMETER);
decl.setName("_EX_");
decl.setType(handle.getCatchType(constantPool));
cStmt.setException(decl);
tryStmt.addCatchStatement(cStmt);
return cStmt;
}
private void makeTryFrames()
{
for (int i= 0; i < tryStatements.size(); i++)
{
TryStatement tryStmt= tryStatements.get(i);
makeTryFrame(tryStmt);
}
}
private void makeTryFrame(TryStatement stmt)
{
TryHeaderNode header= stmt.header;
Node tryNode= graph.getOrCreateNode(stmt.getBeginIndex());
tryNode.stack= new ASTNodeStack();
header.setTryBody(tryNode);
CatchClause clause= (CatchClause) stmt.getCatchStatements().getFirstChild();
while (clause != null)
{
// Push implicit exception.
Node catchNode= graph.createNode(clause.getBeginIndex());
// catchNode.type = NodeType.CATCH;
catchNode.stack= new ASTNodeStack(new VariableBinding(clause.getException()));
header.addCatchNode(catchNode);
clause= (CatchClause) clause.getNextSibling();
}
}
private void compileCodeException()
{
ExceptionHandlers handlers= new ExceptionHandlers(code);
Iterator handleIterator= handlers.iterator();
ExceptionHandler handle= handleIterator.hasNext() ? handleIterator.next() : null;
while (handle != null)
{
boolean hasFinally= false;
int start= handle.getStartPC();
int end= handle.getEndPC();
TryStatement tryStmt= new TryStatement();
tryStmt.header= (TryHeaderNode) graph.createNode(TryHeaderNode.class);
tryStmt.header.tryStmt= tryStmt;
Block tryBlock= new Block(start, end);
tryStmt.setTryBlock(tryBlock);
// tryStmt.setBeginIndex(start);
tryStatements.add(tryStmt);
CatchClause cStmt= null;
// Collect all non-default handlers. The range of each handler is
// from the 'store'-instruction to the beginning of the next
// handler.
while (handle != null && !handle.isDefault() && handle.getStartPC() == start && handle.getEndPC() == end)
{
if (cStmt != null)
{
cStmt.setEndIndex(handle.getHandlerPC() - 1);
}
cStmt= createCatchClause(tryStmt, handle);
handle= handleIterator.hasNext() ? handleIterator.next() : null;
}
int foo= -1;
if (handle != null && handle.isDefault() && handle.getStartPC() == start)
{
// Collect first default handler.
hasFinally= true;
if (cStmt != null)
{
cStmt.setEndIndex(handle.getHandlerPC() - 1);
tryStmt.setEndIndex(handle.getHandlerPC() - 1);
// Warning: We only set a lower bound for the end index. The
// correct index is set later
// when the finally statement is analysed.
}
cStmt= createCatchClause(tryStmt, handle);
foo= handle.getHandlerPC();
handle= handleIterator.hasNext() ? handleIterator.next() : null;
}
// Last catch stmt has no endIndex, yet!
while (handle != null && handle.isDefault() && (handle.getHandlerPC() == foo))
{
// Skip all remaining default handlers.
throw new RuntimeException("remaining default handlers");
// handle = handleIterator.hasNext()?handleIterator.next():null;
}
Block catches= tryStmt.getCatchStatements();
if (catches.getChildCount() == 0)
{
throw new ParseException("A try clause must have at least one (possibly default) catch clause", tryStmt);
}
cStmt= (CatchClause) catches.getChildAt(0);
tryBlock.setEndIndex(cStmt.getBeginIndex() - 1);
cStmt= (CatchClause) catches.getLastChild();
if (cStmt.getEndIndex() == Integer.MIN_VALUE)
{
cStmt.setEndIndex(cStmt.getBeginIndex() + 1);
}
tryStmt.setEndIndex(cStmt.getEndIndex());
if (hasFinally)
{
// Can't say yet where finally block is located.
}
}
}
private void dumpCode()
{
InstructionList il= new InstructionList(code.getCode());
InstructionHandle[] handles= il.getInstructionHandles();
for (InstructionHandle handle : handles)
{
System.out.println(handle.toString(true));
InstructionTargeter[] targeters= handle.getTargeters();
if (targeters != null)
{
for (InstructionTargeter targeter : handle.getTargeters())
{
System.out.println(" Targeter: " + targeter.toString() + " " + targeter.getClass());
}
}
}
for (CodeException ce : code.getExceptionTable())
{
String exceptionType;
if (ce.getCatchType() > 0)
{
Constant constant= constantPool.getConstant(ce.getCatchType());
exceptionType= Pass1.constantToString(constant, constantPool);
}
else
{
exceptionType= "Default";
}
System.out.println(ce.toString() + " " + exceptionType);
}
}
public void parse(Method theMethod, MethodDeclaration theMethodDecl) throws IOException
{
method= theMethod;
methodDecl= theMethodDecl;
code= method.getCode();
if (logger.isDebugEnabled())
{
dumpCode();
}
Block.TAG= 0;
compileCodeException();
bytes= new ByteSequence(code.getCode());
graph.createNode(0);
makeTryFrames();
parseStatement();
try
{
Optimizer optimizer= new Optimizer(methodDecl, tempDecls);
optimizer.optimize();
}
catch (Error e)
{
DragomeJsCompiler.errorCount++;
if (logger.isDebugEnabled())
{
logger.debug("In Expression Optimizer:\n" + e + "\n" + Utils.stackTraceToString(e));
}
else
{
logger.error("In Expression Optimizer:\n " + e);
}
}
Block block;
if (DragomeJsCompiler.compiler.reductionLevel == 0)
{
block= graph.reduceDumb();
}
else
{
block= graph.reduce();
}
methodDecl.setBody(block);
if (loopFound)
throw new UnhandledCompilerProblemException();
}
private boolean isProcedure(ASTNode stmt)
{
if (stmt instanceof MethodInvocation)
{
MethodInvocation mi= (MethodInvocation) stmt;
return mi.getTypeBinding().equals(Type.VOID);
}
return false;
}
Node cNode;
Node lastCurrentNode;
private boolean whileTryProblemDetected= false;
private Jump lastJump;
public static boolean loopFound= false;
private void setCurrentNode(Node theNode)
{
if (cNode == theNode)
return;
cNode= theNode;
if (cNode != null && cNode != lastCurrentNode)
{
logger.debug("Switched to " + cNode);
lastCurrentNode= cNode;
}
}
private void joinNodes(Node node)
{
Collection nodes= node.preds();
Iterator iter= nodes.iterator();
while (iter.hasNext())
{
Node n= (Node) iter.next();
if (n.stack.size() == 0)
iter.remove();
}
if (nodes.size() > 0)
{
mergeStacks(nodes, node.stack);
}
}
private void selectActiveNode(int pc)
{
List activeNodes= new ArrayList();
for (Node node : graph.getNodes())
{
if (node.getCurrentPc() == pc)
{
activeNodes.add(node);
}
}
if (activeNodes.size() == 0)
{
Node node= graph.createNode(pc);
setCurrentNode(node);
return;
}
if (activeNodes.size() == 1)
{
Node node= activeNodes.get(0);
setCurrentNode(node);
return;
}
Node node= graph.getNode(pc);
if (node == null)
throw new RuntimeException("No node found at " + pc);
setCurrentNode(node);
activeNodes.remove(node);
for (Node n : activeNodes)
{
graph.addEdge(n, node);
}
}
private void expressionsToVariables(Node node, boolean clone)
{
if (node.stack.size() == 0)
return;
logger.debug("expressionsToVariables ...");
for (int i= 0; i < node.stack.size(); i++)
{
Expression expr= (Expression) node.stack.get(i);
if (expr instanceof VariableBinding && (((VariableBinding) expr).isTemporary()))
{
continue;
}
VariableBinding vb= methodDecl.createAnonymousVariableBinding(expr.getTypeBinding(), true);
logger.debug("\t" + expr + ' ' + vb.getName());
Assignment a= new Assignment(Assignment.Operator.ASSIGN);
a.setLeftHandSide(vb);
a.setRightHandSide(expr);
node.block.appendChild(a);
node.stack.set(i, clone ? (VariableBinding) vb.clone() : vb);
}
logger.debug("... expressionsToVariables");
}
private Object stacksIdentical(Collection sources, int index)
{
Expression expr= null;
Iterator iter= sources.iterator();
while (iter.hasNext())
{
Node node= (Node) iter.next();
Expression e= (Expression) node.stack.get(index);
if (expr == null)
{
expr= e;
}
else if (e != expr)
{
return expr.getTypeBinding();
}
}
return expr;
}
private void mergeStacks(Collection sources, ASTNodeStack target)
{
logger.debug("Merging ...");
Iterator iter= sources.iterator();
while (iter.hasNext())
{
Node pred= (Node) iter.next();
dump(pred.stack, "Stack for " + pred);
}
int stackSize= -1;
iter= sources.iterator();
while (iter.hasNext())
{
Node pred= (Node) iter.next();
if (stackSize == -1)
{
stackSize= pred.stack.size();
}
else if (stackSize != pred.stack.size())
{
dump(sources);
throw new RuntimeException("Stack size mismatch");
}
}
for (int index= 0; index < stackSize; index++)
{
Object obj= stacksIdentical(sources, index);
if (obj instanceof Expression)
{
target.add((Expression) ((Expression) obj).clone());
logger.debug("\tIdentical: " + obj);
}
else
{
VariableBinding vb= methodDecl.createAnonymousVariableBinding((Type) obj, true);
target.add(vb);
iter= sources.iterator();
while (iter.hasNext())
{
Node node= (Node) iter.next();
Expression expr= (Expression) node.stack.get(index);
Assignment a= new Assignment(Assignment.Operator.ASSIGN);
a.setLeftHandSide((VariableBinding) vb.clone());
if (expr instanceof VariableBinding)
expr= (VariableBinding) expr.clone();
a.setRightHandSide(expr);
node.block.appendChild(a);
}
logger.debug("\t" + vb.getName());
}
}
logger.debug("... Merging stacks");
}
public void parseStatement() throws IOException
{
depth= 0;
while (bytes.available() > 0)
{
int pc= bytes.getIndex();
if (cNode != null)
{
cNode.setCurrentPc(pc);
}
selectActiveNode(pc);
if (cNode.getInitialPc() == pc)
{
joinNodes(cNode);
}
stack= cNode.stack;
ASTNode stmt= parseInstruction();
if (stmt instanceof NoOperation)
continue;
depth+= stmt.getStackDelta();
if (stmt instanceof VariableBinding)
{
depth= depth;
}
logger.debug(" -> " + stmt + " @ " + methodDecl.getLineNumberCursor().getLineNumber(stmt) + ", depth:" + depth + ", delta:" + stmt.getStackDelta());
if (stmt instanceof JumpSubRoutine)
{
JumpSubRoutine jsr= (JumpSubRoutine) stmt;
cNode.block.setEndIndex(jsr.getEndIndex());
Node finallyNode= graph.getNode(jsr.getTargetIndex());
if (finallyNode == null)
{
finallyNode= graph.createNode(jsr.getTargetIndex());
finallyNode.stack= new ASTNodeStack(new Expression());
}
finallyNode.jsrCallers.add(cNode);
if (cNode.preds().size() == 1 && finallyNode.preds().size() == 0 && cNode.getPred() instanceof TryHeaderNode)
{
TryHeaderNode tryHeaderNode= (TryHeaderNode) cNode.getPred();
tryHeaderNode.setFinallyNode(finallyNode);
}
}
else if (stmt instanceof ConditionalBranch)
{
ConditionalBranch cond= (ConditionalBranch) stmt;
if (bytes.getIndex() == cond.getTargetIndex())
{
}
else
{
Node elseNode= graph.getOrCreateNode(bytes.getIndex());
Node ifNode;
if (cond.getTargetIndex() <= pc)
{
Node[] nodes= graph.getOrSplitNodeAt(cNode, cond.getTargetIndex());
cNode= nodes[0];
ifNode= nodes[1];
}
else
{
ifNode= graph.getOrCreateNode(cond.getTargetIndex());
}
BooleanExpression be= new BooleanExpression(cond.getExpression());
graph.addIfElseEdge(cNode, ifNode, elseNode, be);
expressionsToVariables(cNode, false);
cNode= null;
if (lastJump != null && tryStatements.size() > 0 && (cond.getBeginIndex() - 1 == lastJump.getEndIndex()))
whileTryProblemDetected= true;
for (TryStatement tryStatement : tryStatements)
{
boolean nextToTryBegining= tryStatement.getBeginIndex() - 1 == cond.getEndIndex();
boolean sameThanTryBegining= tryStatement.getBeginIndex() == cond.getBeginIndex();
// sameThanTryBegining= false; //TODO identificar si es un while!
if (nextToTryBegining || sameThanTryBegining)
whileTryProblemDetected= true;
}
if (!whileTryProblemDetected)
for (CodeException codeException : code.getExceptionTable())
{
boolean nextToTryBegining= codeException.getEndPC() == cond.getTargetIndex();
if (nextToTryBegining)
whileTryProblemDetected= true;
}
if (whileTryProblemDetected)
throw new UnhandledCompilerProblemException();
}
}
else if (stmt instanceof Jump)
{
int targetPc= ((Jump) stmt).getTargetIndex();
lastJump= (Jump) stmt;
Node targetNode;
if (!whileTryProblemDetected)
for (CodeException codeException : code.getExceptionTable())
{
boolean nextToTryBegining= codeException.getStartPC() - 1 == lastJump.getEndIndex();
if (nextToTryBegining)
throw new UnhandledCompilerProblemException();
}
if (targetPc <= pc)
{
if (whileTryProblemDetected)
throw new UnhandledCompilerProblemException();
loopFound= true;
Node[] nodes= graph.getOrSplitNodeAt(cNode, targetPc);
cNode= nodes[0];
targetNode= nodes[1];
}
else
{
targetNode= graph.getOrCreateNode(targetPc);
}
graph.addEdge(cNode, targetNode);
cNode= null;
}
else if (stmt instanceof SynchronizedBlock || isProcedure(stmt))
{
cNode.block.appendChild(stmt);
}
else if (stmt instanceof Assignment)
{
expressionsToVariables(cNode, true);
cNode.block.appendChild(stmt);
}
else if (stmt instanceof ThrowStatement || stmt instanceof ReturnStatement)
{
cNode.block.appendChild(stmt);
cNode.close();
cNode= null;
}
else
{
stack.push(stmt);
}
}
}
void dump(Collection nodes)
{
if (!logger.isDebugEnabled())
return;
Iterator iter= nodes.iterator();
while (iter.hasNext())
{
Node node= (Node) iter.next();
dump(node.stack, node.toString());
}
}
static void dump(List list, String msg)
{
if (!logger.isDebugEnabled())
return;
StringBuffer sb= new StringBuffer();
sb.append("Begin dumping " + msg + "...\n");
for (int i= 0; i < list.size(); i++)
{
ASTNode node= (ASTNode) list.get(i);
sb.append(" " + i + ": " + node + "\n");
}
sb.append("... end of dump");
logger.debug(sb.toString());
}
private VariableBinding createVariableBinding(int slot, Type type, boolean isWrite)
{
return methodDecl.createVariableBinding(VariableDeclaration.getLocalVariableName(method, slot, bytes.getIndex()), type, isWrite);
}
private InfixExpression createInfixRightLeft(InfixExpression.Operator op, Expression right, Expression left, Type type)
{
InfixExpression binOp= new InfixExpression(op);
binOp.setTypeBinding(type);
binOp.setOperands(left, right);
return binOp;
}
private PrefixExpression createPrefix(PrefixExpression.Operator op, ASTNode operand, Type type)
{
PrefixExpression pe= new PrefixExpression();
pe.setOperator(op);
pe.setTypeBinding(type);
pe.setOperand(operand);
return pe;
}
private Form selectForm(InstructionType instructionType)
{
if (instructionType.getFormCount() == 1)
{
return instructionType.getForm(0);
}
FormLoop: for (int i= 0; i < instructionType.getFormCount(); i++)
{
Form form= instructionType.getForm(i);
for (int j= 0; j < form.getIns().length; j++)
{
Form.Value in= form.getIns()[form.getIns().length - 1 - j];
if (stack.peek(j).getCategory() != in.getCategory())
continue FormLoop;
}
return form;
}
throw new RuntimeException("Could not determine correct form for " + instructionType);
}
private List tempDecls= new ArrayList();
private Expression[] duplicate(Expression e)
{
if (e instanceof NumberLiteral || e instanceof ThisExpression || e instanceof StringLiteral)
{
return new Expression[] { e, (Expression) e.clone() };
}
if (e instanceof VariableBinding && ((VariableBinding) e).isTemporary())
{
VariableBinding vb1= (VariableBinding) e;
VariableBinding vb2= (VariableBinding) vb1.clone();
return new VariableBinding[] { vb1, vb2 };
}
Assignment a= new Assignment(Assignment.Operator.ASSIGN);
a.setRange(bytes.getIndex(), bytes.getIndex());
VariableBinding vb1= methodDecl.createAnonymousVariableBinding(e.getTypeBinding(), true);
VariableBinding vb2= (VariableBinding) vb1.clone();
VariableBinding vb3= (VariableBinding) vb1.clone();
tempDecls.add(vb1.getVariableDeclaration());
vb1.getVariableDeclaration().setParentNode(methodDecl);
a.setLeftHandSide(vb1);
a.setRightHandSide(e);
cNode.block.appendChild(a);
return new VariableBinding[] { vb2, vb3 };
}
private SwitchEdge getOrCreateCaseGroup(Node header, Map switchEdges, int startPc)
{
SwitchEdge switchEdge= switchEdges.get(startPc);
if (switchEdge == null)
{
Node caseGroupNode= graph.createNode(startPc);
switchEdge= (SwitchEdge) graph.addEdge(header, caseGroupNode, SwitchEdge.class);
switchEdges.put(startPc, switchEdge);
}
return switchEdge;
}
private int readUnsigned() throws IOException
{
int index;
if (wide)
{
index= bytes.readUnsignedShort();
wide= false;
}
else
{
index= bytes.readUnsignedByte();
}
return index;
}
private int readSigned() throws IOException
{
int index;
if (wide)
{
index= bytes.readShort();
wide= false;
}
else
{
index= bytes.readByte();
}
return index;
}
private void dup1()
{
Expression[] value1= duplicate(stack.pop());
stack.push(value1[0]);
stack.push(value1[1]);
}
private void dup2()
{
Expression[] value1= duplicate(stack.pop());
Expression[] value2= duplicate(stack.pop());
stack.push(value2[0]);
stack.push(value1[0]);
stack.push(value2[1]);
stack.push(value1[1]);
}
private ASTNode parseInstruction() throws IOException
{
int currentIndex= bytes.getIndex();
short opcode= (short) bytes.readUnsignedByte();
InstructionType instructionType= Const.instructionTypes[opcode];
Form form= selectForm(instructionType);
int opStackDelta= form.getOpStackDelta();
ASTNode instruction= null;
logger.debug(currentIndex + " " + instructionType.getName() + "[" + opcode + "] ");
switch (opcode)
{
case Const.TABLESWITCH:
case Const.LOOKUPSWITCH:
{
Node switchNode= graph.createNode(currentIndex);
switchNode.isSwitchHeader= true;
graph.addEdge(cNode, switchNode);
cNode= null;
int defaultOffset;
int npairs;
int offset;
int remainder= bytes.getIndex() % 4;
int noPadBytes= (remainder == 0) ? 0 : 4 - remainder;
for (int i= 0; i < noPadBytes; i++)
{
byte b;
if ((b= bytes.readByte()) != 0)
{
logger.warn("Padding byte != 0 in " + instructionType.getName() + ":" + b);
}
}
defaultOffset= bytes.readInt();
int low= 0;
if (opcode == Const.LOOKUPSWITCH)
{
npairs= bytes.readInt();
offset= bytes.getIndex() - 8 - noPadBytes - 1;
}
else
{
low= bytes.readInt();
int high= bytes.readInt();
npairs= high - low + 1;
offset= bytes.getIndex() - 12 - noPadBytes - 1;
}
defaultOffset+= offset;
switchNode.switchExpression= stack.pop();
TreeMap caseGroups= new TreeMap();
for (int i= 0; i < npairs; i++)
{
int key;
if (opcode == Const.LOOKUPSWITCH)
{
key= bytes.readInt();
}
else
{
key= low + i;
}
SwitchEdge switchEdge= getOrCreateCaseGroup(switchNode, caseGroups, offset + bytes.readInt());
switchEdge.expressions.add(NumberLiteral.create(new Integer(key)));
}
try
{
Node defaultNode= graph.createNode(defaultOffset);
graph.addEdge(switchNode, defaultNode);
}
catch (Exception e)
{
setClassNotReversible(methodDecl);
}
instruction= new NoOperation();
break;
}
case Const.CHECKCAST:
{
CastExpression cast= new CastExpression();
int index= bytes.readUnsignedShort();
ConstantClass c= (ConstantClass) constantPool.getConstant(index);
ObjectType type= new ObjectType(c.getBytes(constantPool).replace('/', '.'));
cast.setTypeBinding(type);
cast.setExpression(stack.pop());
instruction= cast;
break;
}
case Const.INSTANCEOF:
{
int index= bytes.readUnsignedShort();
InstanceofExpression ex= new InstanceofExpression();
Expression objectref= stack.pop();
ex.setLeftOperand(objectref);
ConstantClass c= (ConstantClass) constantPool.getConstant(index);
ObjectType type= new ObjectType(c.getBytes(constantPool).replace('/', '.'));
ex.setRightOperand(type);
ex.widen(objectref);
instruction= ex;
break;
}
case Const.ACONST_NULL:
instruction= new NullLiteral();
break;
case Const.JSR:
{
instruction= new JumpSubRoutine(currentIndex + bytes.readShort());
opStackDelta= 0;
break;
}
case Const.JSR_W:
{
instruction= new JumpSubRoutine(currentIndex + bytes.readInt());
break;
}
case Const.IFEQ:
instruction= createConditional(currentIndex, InfixExpression.Operator.EQUALS, NumberLiteral.create(0));
break;
case Const.IFNE:
instruction= createConditional(currentIndex, InfixExpression.Operator.NOT_EQUALS, NumberLiteral.create(0));
break;
case Const.IFGE:
instruction= createConditional(currentIndex, InfixExpression.Operator.GREATER_EQUALS, NumberLiteral.create(0));
break;
case Const.IFGT:
instruction= createConditional(currentIndex, InfixExpression.Operator.GREATER, NumberLiteral.create(0));
break;
case Const.IFLE:
instruction= createConditional(currentIndex, InfixExpression.Operator.LESS_EQUALS, NumberLiteral.create(0));
break;
case Const.IFLT:
instruction= createConditional(currentIndex, InfixExpression.Operator.LESS, NumberLiteral.create(0));
break;
case Const.IFNONNULL:
instruction= createConditional(currentIndex, InfixExpression.Operator.NOT_EQUALS, new NullLiteral());
break;
case Const.IFNULL:
instruction= createConditional(currentIndex, InfixExpression.Operator.EQUALS, new NullLiteral());
break;
case Const.IF_ACMPEQ:
case Const.IF_ICMPEQ:
instruction= createConditional(currentIndex, InfixExpression.Operator.EQUALS);
break;
case Const.IF_ACMPNE:
case Const.IF_ICMPNE:
instruction= createConditional(currentIndex, InfixExpression.Operator.NOT_EQUALS);
break;
case Const.IF_ICMPGE:
instruction= createConditional(currentIndex, InfixExpression.Operator.GREATER_EQUALS);
break;
case Const.IF_ICMPGT:
instruction= createConditional(currentIndex, InfixExpression.Operator.GREATER);
break;
case Const.IF_ICMPLE:
instruction= createConditional(currentIndex, InfixExpression.Operator.LESS_EQUALS);
break;
case Const.IF_ICMPLT:
instruction= createConditional(currentIndex, InfixExpression.Operator.LESS);
break;
case Const.LCMP:
case Const.FCMPL:
case Const.FCMPG:
case Const.DCMPL:
case Const.DCMPG:
{
MethodBinding binding= MethodBinding.lookup("javascript.Utils", "cmp", "(DDI)I");
MethodInvocation mi= new MethodInvocation(methodDecl, binding);
Expression value2= stack.pop();
mi.addArgument(stack.pop());
mi.addArgument(value2);
int gORl= 0;
if (instructionType.getName().endsWith("g"))
gORl= 1;
else if (instructionType.getName().endsWith("l"))
gORl= -1;
mi.addArgument(NumberLiteral.create(gORl));
instruction= mi;
break;
}
case Const.GOTO:
{
instruction= new Jump(currentIndex + bytes.readShort());
break;
}
case Const.GOTO_W:
{
instruction= new Jump(currentIndex + bytes.readInt());
break;
}
case Const.NEW:
{
ConstantClass c= (ConstantClass) constantPool.getConstant(bytes.readUnsignedShort());
ObjectType type= new ObjectType(c.getBytes(constantPool).replace('/', '.'));
instruction= new ClassInstanceCreation(type);
}
break;
case Const.NEWARRAY:
{
String componentSignature= BasicType.getType(bytes.readByte()).getSignature();
List dimensions= new ArrayList();
dimensions.add(stack.pop());
ArrayCreation ac= new ArrayCreation(methodDecl, new ObjectType("[" + componentSignature), dimensions);
instruction= ac;
break;
}
case Const.ANEWARRAY:
{
ConstantClass c= (ConstantClass) constantPool.getConstant(bytes.readUnsignedShort());
String componentSignature= c.getBytes(constantPool).replace('/', '.');
Type arrayType;
if (componentSignature.startsWith("["))
{
arrayType= new ObjectType("[" + componentSignature);
}
else
{
arrayType= new ObjectType("[L" + componentSignature + ";");
}
List dimensions= new ArrayList();
dimensions.add(stack.pop());
ArrayCreation ac= new ArrayCreation(methodDecl, arrayType, dimensions);
instruction= ac;
break;
}
case Const.MULTIANEWARRAY:
{
ConstantClass c= (ConstantClass) constantPool.getConstant(bytes.readUnsignedShort());
ObjectType arrayType= new ObjectType(c.getBytes(constantPool).replace('/', '.'));
int dimCount= bytes.readUnsignedByte();
opStackDelta= 1 - dimCount;
List dimensions= new ArrayList();
for (int i= 0; i < dimCount; i++)
{
dimensions.add(0, stack.pop());
}
ArrayCreation ac= new ArrayCreation(methodDecl, arrayType, dimensions);
instruction= ac;
break;
}
case Const.PUTSTATIC:
case Const.PUTFIELD:
{
Assignment a= new Assignment(Assignment.Operator.ASSIGN);
Expression rhs= stack.pop();
int index= bytes.readUnsignedShort();
ConstantFieldref fieldRef= (ConstantFieldref) constantPool.getConstant(index, Constants.CONSTANT_Fieldref);
FieldAccess fa= new FieldWrite();
fa.setName(getFieldName(fieldRef));
fa.setType(new ObjectType(fieldRef.getClass(constantPool)));
fa.initialize(methodDecl);
if (opcode == Const.PUTFIELD)
{
fa.setExpression(stack.pop());
}
a.setLeftHandSide(fa);
a.setRightHandSide(rhs);
instruction= a;
break;
}
case Const.GETFIELD:
{
int index= bytes.readUnsignedShort();
ConstantFieldref fieldRef= (ConstantFieldref) constantPool.getConstant(index, Constants.CONSTANT_Fieldref);
Expression ex= stack.pop();
FieldAccess fa= new FieldRead();
fa.setType(new ObjectType(fieldRef.getClass(constantPool)));
fa.setName(getFieldName(fieldRef));
fa.setExpression(ex);
fa.initialize(methodDecl);
instruction= fa;
break;
}
case Const.GETSTATIC:
{
int index= bytes.readUnsignedShort();
ConstantFieldref fieldRef= (ConstantFieldref) constantPool.getConstant(index, Constants.CONSTANT_Fieldref);
FieldAccess fa= new FieldRead();
fa.setType(new ObjectType(fieldRef.getClass(constantPool)));
fa.setName(getFieldName(fieldRef));
fa.initialize(methodDecl);
instruction= fa;
break;
}
case Const.DUP:
{
dup1();
instruction= stack.pop();
break;
}
case Const.DUP2:
if (form.getIndex() == 0)
{
dup2();
instruction= stack.pop();
}
else
{
dup1();
instruction= stack.pop();
}
break;
case Const.DUP_X1:
{
dup1();
stack.rotate(2);
instruction= stack.pop();
break;
}
case Const.DUP_X2:
{
if (form.getIndex() == 0)
{
dup1();
stack.rotate(3);
}
else
{
dup1();
stack.rotate(2);
}
instruction= stack.pop();
break;
}
case Const.DUP2_X1:
if (form.getIndex() == 0)
{
dup2();
stack.rotate(4);
stack.rotate(4);
}
else
{
dup1();
stack.rotate(2);
}
instruction= stack.pop();
break;
case Const.DUP2_X2:
if (form.getIndex() == 0)
{
dup2();
stack.rotate(5);
stack.rotate(5);
}
else if (form.getIndex() == 1)
{
dup1();
stack.rotate(3);
}
else if (form.getIndex() == 2)
{
dup2();
stack.rotate(4);
stack.rotate(4);
}
else
{
dup1();
stack.rotate(2);
}
instruction= stack.pop();
break;
case Const.SWAP:
{
stack.rotate(1);
instruction= new NoOperation();
break;
}
case Const.I2S:
case Const.I2F:
case Const.L2I:
case Const.F2I:
case Const.F2L:
case Const.L2F:
case Const.L2D:
case Const.D2I:
case Const.D2L:
case Const.D2F:
case Const.I2B:
case Const.I2C:
instruction= new PrimitiveCast(opcode, stack.pop(), form.getResultType());
break;
case Const.I2L:
stack.peek().setTypeBinding(Type.LONG);
instruction= new NoOperation();
break;
case Const.I2D:
case Const.F2D:
stack.peek().setTypeBinding(Type.DOUBLE);
instruction= new NoOperation();
break;
case Const.INEG:
case Const.LNEG:
case Const.FNEG:
case Const.DNEG:
instruction= createPrefix(PrefixExpression.MINUS, stack.pop(), form.getResultType());
break;
case Const.ISHR:
case Const.LSHR:
instruction= createInfixRightLeft(InfixExpression.Operator.RIGHT_SHIFT_SIGNED, stack.pop(), stack.pop(), form.getResultType());
break;
case Const.ISHL:
case Const.LSHL:
instruction= createInfixRightLeft(InfixExpression.Operator.LEFT_SHIFT, stack.pop(), stack.pop(), form.getResultType());
break;
case Const.IUSHR:
case Const.LUSHR:
instruction= createInfixRightLeft(InfixExpression.Operator.RIGHT_SHIFT_UNSIGNED, stack.pop(), stack.pop(), form.getResultType());
break;
case Const.IADD:
case Const.LADD:
case Const.FADD:
case Const.DADD:
instruction= createInfixRightLeft(InfixExpression.Operator.PLUS, stack.pop(), stack.pop(), form.getResultType());
break;
case Const.ISUB:
case Const.LSUB:
case Const.FSUB:
case Const.DSUB:
instruction= createInfixRightLeft(InfixExpression.Operator.MINUS, stack.pop(), stack.pop(), form.getResultType());
break;
case Const.IMUL:
case Const.LMUL:
case Const.FMUL:
case Const.DMUL:
instruction= createInfixRightLeft(InfixExpression.Operator.TIMES, stack.pop(), stack.pop(), form.getResultType());
break;
case Const.IDIV:
case Const.LDIV:
case Const.FDIV:
case Const.DDIV:
instruction= createInfixRightLeft(InfixExpression.Operator.DIVIDE, stack.pop(), stack.pop(), form.getResultType());
break;
case Const.IREM:
case Const.LREM:
case Const.FREM:
case Const.DREM:
instruction= createInfixRightLeft(InfixExpression.Operator.REMAINDER, stack.pop(), stack.pop(), form.getResultType());
break;
case Const.IXOR:
case Const.LXOR:
instruction= createInfixRightLeft(InfixExpression.Operator.XOR, stack.pop(), stack.pop(), form.getResultType());
break;
case Const.IAND:
case Const.LAND:
instruction= createInfixRightLeft(InfixExpression.Operator.AND, stack.pop(), stack.pop(), form.getResultType());
break;
case Const.IOR:
case Const.LOR:
instruction= createInfixRightLeft(InfixExpression.Operator.OR, stack.pop(), stack.pop(), form.getResultType());
break;
case Const.IINC:
{
boolean isWide= wide;
int index= readUnsigned();
wide= isWide;
int constByte= readSigned();
VariableBinding reference= createVariableBinding(index, Type.INT, true);
reference.setField(false);
Assignment assign= new Assignment(Assignment.Operator.PLUS_ASSIGN);
assign.setLeftHandSide(reference);
assign.setRightHandSide(NumberLiteral.create(new Integer(constByte)));
instruction= assign;
break;
}
case Const.ARRAYLENGTH:
{
Expression arrayRef= stack.pop();
FieldAccess access= new FieldRead();
access.setExpression(arrayRef);
access.setName("length");
instruction= access;
break;
}
case Const.WIDE:
wide= true;
return new NoOperation();
case Const.ILOAD_0:
case Const.ILOAD_1:
case Const.ILOAD_2:
case Const.ILOAD_3:
{
VariableBinding reference= createVariableBinding(opcode - Const.ILOAD_0, Type.INT, false);
reference.setField(false);
instruction= reference;
break;
}
case Const.LLOAD_0:
case Const.LLOAD_1:
case Const.LLOAD_2:
case Const.LLOAD_3:
{
VariableBinding reference= createVariableBinding(opcode - Const.LLOAD_0, Type.LONG, false);
reference.setField(false);
instruction= reference;
break;
}
case Const.FLOAD_0:
case Const.FLOAD_1:
case Const.FLOAD_2:
case Const.FLOAD_3:
{
VariableBinding reference= createVariableBinding(opcode - Const.FLOAD_0, Type.FLOAT, false);
reference.setField(false);
instruction= reference;
break;
}
case Const.DLOAD_0:
case Const.DLOAD_1:
case Const.DLOAD_2:
case Const.DLOAD_3:
{
VariableBinding reference= createVariableBinding(opcode - Const.DLOAD_0, Type.DOUBLE, false);
reference.setField(false);
instruction= reference;
break;
}
case Const.ALOAD_0:
case Const.ALOAD_1:
case Const.ALOAD_2:
case Const.ALOAD_3:
{
if (opcode == Const.ALOAD_0 && !Modifier.isStatic(methodDecl.getAccess()))
{
ThisExpression reference= new ThisExpression();
instruction= reference;
}
else
{
VariableBinding reference= createVariableBinding(opcode - Const.ALOAD_0, Type.OBJECT, false);
reference.setField(true);
instruction= reference;
}
break;
}
case Const.ILOAD:
case Const.LLOAD:
case Const.FLOAD:
case Const.DLOAD:
{
VariableBinding reference= createVariableBinding(readUnsigned(), form.getResultType(), false);
reference.setField(false);
instruction= reference;
break;
}
case Const.ALOAD:
{
VariableBinding reference= createVariableBinding(readUnsigned(), Type.OBJECT, false);
reference.setField(true);
instruction= reference;
break;
}
case Const.BALOAD:
case Const.CALOAD:
case Const.SALOAD:
case Const.IALOAD:
case Const.LALOAD:
case Const.FALOAD:
case Const.DALOAD:
case Const.AALOAD:
{
Expression index= stack.pop();
Expression arrayRef= stack.pop();
ArrayAccess aa;
aa= new ArrayAccess();
aa.setTypeBinding(form.getResultType());
aa.setArray(arrayRef);
aa.setIndex(index);
instruction= aa;
break;
}
case Const.BASTORE:
case Const.CASTORE:
case Const.SASTORE:
case Const.IASTORE:
case Const.LASTORE:
case Const.FASTORE:
case Const.DASTORE:
case Const.AASTORE:
{
Expression value= stack.pop();
Expression index= stack.pop();
Expression arrayRef= stack.pop();
if (arrayRef instanceof ArrayCreation)
{
ArrayCreation ac= (ArrayCreation) arrayRef;
if (ac.getInitializer() == null)
{
ac.setInitializer(new ArrayInitializer());
}
ac.getInitializer().getExpressions().add(value);
instruction= new NoOperation();
break;
}
Assignment a= new Assignment(Assignment.Operator.ASSIGN);
ArrayAccess aa;
aa= new ArrayAccess();
aa.setArray(arrayRef);
aa.setIndex(index);
a.setLeftHandSide(aa);
a.setRightHandSide(value);
instruction= a;
break;
}
case Const.DSTORE:
case Const.DSTORE_0:
case Const.DSTORE_1:
case Const.DSTORE_2:
case Const.DSTORE_3:
{
int index;
if (opcode == Const.DSTORE)
{
index= readUnsigned();
}
else
{
index= opcode - Const.DSTORE_0;
}
Assignment a= new Assignment(Assignment.Operator.ASSIGN);
VariableBinding reference= createVariableBinding(index, Type.DOUBLE, true);
reference.setField(false);
a.setLeftHandSide(reference);
a.setRightHandSide(stack.pop());
instruction= a;
break;
}
case Const.FSTORE:
case Const.FSTORE_0:
case Const.FSTORE_1:
case Const.FSTORE_2:
case Const.FSTORE_3:
{
int index;
if (opcode == Const.FSTORE)
{
index= readUnsigned();
}
else
{
index= opcode - Const.FSTORE_0;
}
Assignment a= new Assignment(Assignment.Operator.ASSIGN);
VariableBinding reference= createVariableBinding(index, Type.FLOAT, true);
reference.setField(false);
a.setLeftHandSide(reference);
a.setRightHandSide(stack.pop());
instruction= a;
break;
}
case Const.ISTORE:
case Const.ISTORE_0:
case Const.ISTORE_1:
case Const.ISTORE_2:
case Const.ISTORE_3:
{
int index;
if (opcode == Const.ISTORE)
{
index= readUnsigned();
}
else
{
index= opcode - Const.ISTORE_0;
}
Assignment a= new Assignment(Assignment.Operator.ASSIGN);
VariableBinding reference= createVariableBinding(index, Type.INT, true);
reference.setField(false);
a.setLeftHandSide(reference);
a.setRightHandSide(stack.pop());
instruction= a;
break;
}
case Const.LSTORE:
case Const.LSTORE_0:
case Const.LSTORE_1:
case Const.LSTORE_2:
case Const.LSTORE_3:
{
int index;
if (opcode == Const.LSTORE)
{
index= readUnsigned();
}
else
{
index= opcode - Const.LSTORE_0;
}
Assignment a= new Assignment(Assignment.Operator.ASSIGN);
VariableBinding reference= createVariableBinding(index, Type.LONG, true);
reference.setField(false);
a.setLeftHandSide(reference);
a.setRightHandSide(stack.pop());
instruction= a;
break;
}
case Const.ASTORE:
case Const.ASTORE_0:
case Const.ASTORE_1:
case Const.ASTORE_2:
case Const.ASTORE_3:
{
Assignment a= new Assignment(Assignment.Operator.ASSIGN);
int index;
if (opcode == Const.ASTORE)
{
index= readUnsigned();
}
else
{
index= (opcode - Const.ASTORE_0);
}
VariableBinding reference= createVariableBinding(index, Type.OBJECT, true);
a.setLeftHandSide(reference);
if (stack.size() > 0)
{
a.setRightHandSide(stack.pop());
}
instruction= a;
break;
}
case Const.ATHROW:
{
ThrowStatement throwStmt= new ThrowStatement();
throwStmt.setExpression(stack.pop());
instruction= throwStmt;
break;
}
case Const.ICONST_M1:
case Const.ICONST_0:
case Const.ICONST_1:
case Const.ICONST_2:
case Const.ICONST_3:
case Const.ICONST_4:
case Const.ICONST_5:
instruction= NumberLiteral.create(new Integer(-1 + opcode - Const.ICONST_M1));
break;
case Const.LCONST_0:
case Const.LCONST_1:
instruction= NumberLiteral.create(new Long(opcode - Const.LCONST_0));
break;
case Const.FCONST_0:
case Const.FCONST_1:
case Const.FCONST_2:
instruction= NumberLiteral.create(new Float(opcode - Const.FCONST_0));
break;
case Const.DCONST_0:
case Const.DCONST_1:
instruction= NumberLiteral.create(new Double(opcode - Const.DCONST_0));
break;
case Const.BIPUSH:
{
NumberLiteral literal= NumberLiteral.create(new Byte(bytes.readByte()));
instruction= literal;
break;
}
case Const.SIPUSH:
{
NumberLiteral il= NumberLiteral.create(new Short(bytes.readShort()));
instruction= il;
break;
}
case Const.LDC:
case Const.LDC_W:
case Const.LDC2_W:
{
int index;
if (opcode == Const.LDC)
{
index= bytes.readUnsignedByte();
}
else
{
index= bytes.readUnsignedShort();
}
Constant constant= constantPool.getConstant(index);
if (opcode == Const.LDC2_W && (constant.getTag() != Constants.CONSTANT_Double && constant.getTag() != Constants.CONSTANT_Long))
throw new RuntimeException("LDC2_W must load long or double");
if (constant.getTag() == Constants.CONSTANT_Integer)
{
instruction= NumberLiteral.create(new Integer(((ConstantInteger) constant).getBytes()));
}
else if (constant.getTag() == Constants.CONSTANT_Float)
{
instruction= NumberLiteral.create(new Float(((ConstantFloat) constant).getBytes()));
}
else if (constant.getTag() == Constants.CONSTANT_Long)
{
instruction= NumberLiteral.create(new Long(((ConstantLong) constant).getBytes()));
}
else if (constant.getTag() == Constants.CONSTANT_Double)
{
instruction= NumberLiteral.create(new Double(((ConstantDouble) constant).getBytes()));
}
else if (constant.getTag() == Constants.CONSTANT_Utf8)
{
instruction= new StringLiteral(((ConstantUtf8) constant).getBytes());
}
else if (constant.getTag() == Constants.CONSTANT_String)
{
int k= ((ConstantString) constant).getStringIndex();
constant= constantPool.getConstant(k, Constants.CONSTANT_Utf8);
instruction= new StringLiteral(((ConstantUtf8) constant).getBytes());
}
else if (constant.getTag() == Constants.CONSTANT_Class)
{
Signature signature= Project.getSingleton().getSignature(((ConstantClass) constant).getBytes(constantPool));
instruction= new ClassLiteral(signature);
}
else
{
throw new RuntimeException("Cannot handle constant tag: " + constant.getTag());
}
break;
}
case Const.RET:
{
int index= readUnsigned();
ReturnStatement r= new ReturnStatement(currentIndex, currentIndex);
r.setExpression(createVariableBinding(index, Type.INT, false));
instruction= r;
break;
}
case Const.RETURN:
case Const.IRETURN:
case Const.FRETURN:
case Const.LRETURN:
case Const.DRETURN:
case Const.ARETURN:
{
ReturnStatement r= new ReturnStatement(currentIndex, currentIndex);
if (opcode != Const.RETURN)
{
r.setExpression(stack.pop());
}
instruction= r;
break;
}
case Const.POP:
case Const.POP2:
{
if (opcode == Const.POP2 && form.getIndex() == 1)
{
ASTNode a= stack.pop();
// cNode.block.appendChild(a);
a= stack.pop();
// cNode.block.appendChild(a);
// throw new UnsupportedOperationException("InstructionType " + instructionType.getName() + " not supported");
}
else
{
ASTNode a= stack.pop();
if (!(a instanceof VariableBinding))
{
// be an ASTNode,
// because it has no location.
cNode.block.appendChild(a);
}
}
instruction= new NoOperation();
break;
}
case Const.NOP:
// Format: nop
// Operand stack: ... -> ...
return new NoOperation();
case Const.XXXUNUSEDXXX:
// Format: xxxunusedxxx
// Operand stack: ... -> ...
logger.info("Byte code contains unused operation (Ignored)");
return new NoOperation();
case Const.INVOKEINTERFACE:
// Format: invokeinterface, index(short), count(byte), 0(byte)
// Operand stack: ..., objectref(), arg1(), ...(), argN() -> ...
case Const.INVOKESPECIAL:
// Format: invokespecial
// Operand stack: ..., objectref(), arg1(), ...(), argN() -> ...
case Const.INVOKEVIRTUAL:
// Format: invokevirtual
// Operand stack: ..., objectref(), arg1(), ...(), argN() -> ...
case Const.INVOKESTATIC:
{
// Format: invokestatic, index(short)
// Operand stack: ..., arg1(), ...(), argN() -> ...
int index= bytes.readUnsignedShort();
MethodBinding methodBinding= MethodBinding.lookup(index, constantPool);
MethodInvocation invocation= new MethodInvocation(methodDecl, methodBinding);
// Processor.getLogger().finer(method.getName() + "->" +
// invocation.binding);
int nArgs= methodBinding.getParameterTypes().length;
int kk= stack.size() - nArgs;
for (int i= 0; i < nArgs; i++)
{
Expression arg= (Expression) stack.get(kk);
stack.remove(kk);
invocation.addArgument(arg);
}
opStackDelta= -nArgs;
if (opcode == Const.INVOKEVIRTUAL || opcode == Const.INVOKESPECIAL || opcode == Const.INVOKEINTERFACE)
{
opStackDelta--;
invocation.setExpression(stack.pop());
}
else
{ // INVOKESTATIC
// Name name = new Name(method.getClassName());
// invocation.setExpression(name);
}
if (methodBinding.getReturnType() != Type.VOID)
{
opStackDelta++;
}
if (opcode == Const.INVOKEINTERFACE)
{
bytes.readUnsignedByte(); // historical, redundant number of
// arguments.
bytes.readUnsignedByte(); // Last byte is a reserved space.
}
else if (opcode == Const.INVOKESPECIAL)
{
invocation.isSpecial= true;
}
// if (opcode==Const.INVOKESPECIAL && stack.size() > 0 &&
// stack.peek() instanceof ClassInstanceCreation &&
// methodBinding.getName().equals("")) {
// ClassInstanceCreation cic = (ClassInstanceCreation) stack.pop();
// List args = invocation.getArguments();
// for (int i=0; i ...
SynchronizedBlock sb= new SynchronizedBlock();
sb.monitor= stack.pop();
sb.widen(sb.monitor);
sb.setEndIndex(currentIndex);
instruction= sb;
break;
}
case Const.MONITOREXIT:
// Format: monitorexit
// Operand stack: ..., objectref() -> ...
instruction= new NoOperation();
instruction.widen(stack.pop());
instruction.setEndIndex(currentIndex);
break;
default:
throw new UnsupportedOperationException("InstructionType " + instructionType.getName() + " not supported");
// break;
}
if (opcode != Const.WIDE && wide)
throw new RuntimeException("Expected wide operation");
instruction.setStackDelta(opStackDelta);
if (opcode < Const.DUP || opcode > Const.DUP2_X2)
{
instruction.leftWiden(currentIndex);
instruction.rightWiden(bytes.getIndex() - 1);
}
currentNode= instruction;
return instruction;
}
public static void setClassNotReversible(MethodDeclaration methodDeclaration)
{
ObjectType declaringClass= methodDeclaration.getMethodBinding().getDeclaringClass();
Log.getLogger().debug("Not reversible method: " + methodDeclaration.getMethodBinding().getName() + " in: " + declaringClass);
ClassUnit classUnit= Project.getSingleton().getClassUnit(declaringClass.getClassName());
classUnit.addNotReversibleMethod(extractMethodNameSignature(methodDeclaration.getMethodBinding()));
// classUnit.setReversible(false);
}
public static String extractMethodNameSignature(MethodBinding methodBinding)
{
return methodBinding.getName() + "#" + methodBinding.getSignature();
}
ConditionalBranch createConditional(int currentIndex, InfixExpression.Operator operator) throws IOException
{
ConditionalBranch c= new ConditionalBranch(currentIndex + bytes.readShort());
InfixExpression be= new InfixExpression(operator);
Expression rightOperand= stack.pop();
be.setOperands(stack.pop(), rightOperand);
c.setExpression(be);
return c;
}
ConditionalBranch createConditional(int currentIndex, InfixExpression.Operator operator, Expression rightOperand) throws IOException
{
ConditionalBranch c= new ConditionalBranch(currentIndex + bytes.readShort());
Expression leftOperand= stack.pop();
if (leftOperand.getTypeBinding() != null && leftOperand.getTypeBinding() == Type.BOOLEAN)
{
if (operator == InfixExpression.Operator.EQUALS && NumberLiteral.isZero(rightOperand))
{
c.setExpression(Optimizer.negate(leftOperand));
}
else
{
c.setExpression(leftOperand);
}
}
else
{
InfixExpression be= new InfixExpression(operator);
be.setOperands(leftOperand, rightOperand);
c.setExpression(be);
}
return c;
}
private String getFieldName(ConstantFieldref fieldRef)
{
ConstantNameAndType nameAndType= (ConstantNameAndType) constantPool.getConstant(fieldRef.getNameAndTypeIndex());
return nameAndType.getName(constantPool);
}
public static String constantToString(Constant c, ConstantPool constantPool) throws ClassFormatException
{
String str;
byte tag= c.getTag();
switch (tag)
{
case Constants.CONSTANT_Class:
str= Utility.compactClassName(((ConstantClass) c).getBytes(constantPool), false);
break;
case Constants.CONSTANT_String:
str= "\"" + Utils.escape(((ConstantString) c).getBytes(constantPool)) + "\"";
break;
case Constants.CONSTANT_Utf8:
str= ((ConstantUtf8) c).getBytes();
break;
case Constants.CONSTANT_Double:
str= "" + ((ConstantDouble) c).getBytes();
break;
case Constants.CONSTANT_Float:
str= "" + ((ConstantFloat) c).getBytes();
break;
case Constants.CONSTANT_Long:
str= "" + ((ConstantLong) c).getBytes();
break;
case Constants.CONSTANT_Integer:
str= "" + ((ConstantInteger) c).getBytes();
break;
case Constants.CONSTANT_NameAndType:
str= ((ConstantNameAndType) c).getName(constantPool);
break;
case Constants.CONSTANT_InterfaceMethodref:
case Constants.CONSTANT_Methodref:
case Constants.CONSTANT_Fieldref:
str= ((ConstantCP) c).getClass(constantPool);
break;
default: // Never reached
throw new RuntimeException("Unknown constant type " + tag);
}
return str;
}
}