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git-svn-id: https://svn.code.sf.net/p/jode/code/trunk@107 379699f6-c40d-0410-875b-85095c16579e
stable
jochen 26 years ago
parent a421adad08
commit ba05fcd077
24 changed files with 1732 additions and 1386 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 1483
      jode/jode/bytecode/Opcodes.java
  2. 133
      jode/jode/decompiler/CodeAnalyzer.java
  3. 14
      jode/jode/expr/ComplexExpression.java
  4. 50
      jode/jode/expr/ConstantArrayOperator.java
  5. 5
      jode/jode/expr/ConstructorOperator.java
  6. 3
      jode/jode/expr/Expression.java
  7. 22
      jode/jode/flow/CombineIfGotoExpressions.java
  8. 20
      jode/jode/flow/CompleteSynchronized.java
  9. 7
      jode/jode/flow/ConditionalBlock.java
  10. 61
      jode/jode/flow/CreateAssignExpression.java
  11. 180
      jode/jode/flow/CreateConstantArray.java
  12. 156
      jode/jode/flow/CreateExpression.java
  13. 20
      jode/jode/flow/CreateForInitializer.java
  14. 260
      jode/jode/flow/CreateIfThenElseOperator.java
  15. 71
      jode/jode/flow/CreateNewConstructor.java
  16. 215
      jode/jode/flow/CreatePrePostIncExpression.java
  17. 268
      jode/jode/flow/FlowBlock.java
  18. 10
      jode/jode/flow/InstructionContainer.java
  19. 8
      jode/jode/flow/LoopBlock.java
  20. 69
      jode/jode/flow/RemoveEmpty.java
  21. 5
      jode/jode/flow/SpecialBlock.java
  22. 52
      jode/jode/flow/StructuredBlock.java
  23. 4
      jode/jode/flow/SynchronizedBlock.java
  24. 2
      jode/jode/type/ClassInterfacesType.java

1483
jode/jode/bytecode/Opcodes.java
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File diff suppressed because it is too large Load Diff

133
jode/jode/decompiler/CodeAnalyzer.java
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@ -36,7 +36,6 @@ import gnu.bytecode.Spy;
public class CodeAnalyzer implements Analyzer {
TransformExceptionHandlers handler;
FlowBlock methodHeader;
CodeAttr code;
MethodAnalyzer method;
@ -71,19 +70,78 @@ public class CodeAnalyzer implements Analyzer {
param.addElement(getLocalInfo(0, i));
}
void readCode(CodeAttr bincode)
private final static int SEQUENTIAL = 1;
private final static int PREDECESSORS = 2;
/**
* @param code The code array.
* @param handlers The exception handlers.
*/
void readCode(byte[] code, short[] handlers)
throws ClassFormatError
{
byte[] code = bincode.getCode();
byte[] flags = new byte[code.length];
int[] lengths = new int[code.length];
try {
DataInputStream stream =
new DataInputStream(new ByteArrayInputStream(code));
for (int addr = 0; addr < code.length; ) {
int[] succs = Opcodes.getSizeAndSuccs(addr, stream);
if (succs.length == 2
&& succs[1] == addr + succs[0])
flags[addr] |= SEQUENTIAL;
lengths[addr] = succs[0];
addr += succs[0];
for (int i=1; i<succs.length; i++)
if (succs[i] != addr)
flags[succs[i]] |= PREDECESSORS;
}
} catch (IOException ex) {
throw new ClassFormatError(ex.toString());
}
for (int i=0; i<handlers.length; i += 4) {
int start = handlers[i + 0];
int handler = handlers[i + 2];
if (start < 0) start += 65536;
if (handler < 0) handler += 65536;
flags[start] |= PREDECESSORS;
flags[handler] |= PREDECESSORS;
}
FlowBlock[] instr = new FlowBlock[code.length];
int returnCount;
try {
DataInputStream stream =
new DataInputStream(new ByteArrayInputStream(code));
/* While we read the opcodes into FlowBlocks
* we try to combine sequential blocks, as soon as we
* find two sequential instructions in a row, where the
* second has no predecessors.
*/
int mark = 1000;
FlowBlock lastBlock = null;
for (int addr = 0; addr < code.length; ) {
instr[addr] = Opcodes.readOpcode(addr, stream, this);
jode.flow.StructuredBlock block
= Opcodes.readOpcode(addr, stream, this);
if (jode.Decompiler.isVerbose && addr > mark) {
System.err.print('.');
mark += 1000;
}
addr = instr[addr].getNextAddr();
if (lastBlock != null && flags[addr] == SEQUENTIAL) {
lastBlock.doSequentialT1(block, lengths[addr]);
} else {
instr[addr] = new FlowBlock(this, addr,
lengths[addr], block);
lastBlock = ((flags[addr] & SEQUENTIAL) == 0)
? null : instr[addr];
}
addr += lengths[addr];
}
} catch (IOException ex) {
throw new ClassFormatError(ex.toString());
@ -94,28 +152,74 @@ public class CodeAnalyzer implements Analyzer {
addr = instr[addr].getNextAddr();
}
handler = new TransformExceptionHandlers(instr);
short[] handlers = Spy.getExceptionHandlers(bincode);
TransformExceptionHandlers excHandlers
= new TransformExceptionHandlers(instr);
for (int i=0; i<handlers.length; i += 4) {
Type type = null;
int start = handlers[i + 0];
int end = handlers[i + 1];
int handler = handlers[i + 2];
if (start < 0) start += 65536;
if (end < 0) end += 65536;
if (handler < 0) handler += 65536;
if (handlers[i + 3 ] != 0) {
CpoolClass cpcls = (CpoolClass)
method.classAnalyzer.getConstant(handlers[i + 3]);
type = Type.tClass(cpcls.getName().getString());
}
handler.addHandler(handlers[i + 0], handlers[i + 1],
handlers[i + 2], type);
excHandlers.addHandler(start, end, handler, type);
}
if (Decompiler.isVerbose)
System.err.print('-');
excHandlers.analyze();
methodHeader = instr[0];
}
methodHeader.analyze();
}
// void readCode(byte[] code, short[] handlers)
// throws ClassFormatError
// {
// FlowBlock[] instr = new FlowBlock[code.length];
// int returnCount;
// try {
// DataInputStream stream =
// new DataInputStream(new ByteArrayInputStream(code));
// for (int addr = 0; addr < code.length; ) {
// instr[addr] = Opcodes.readOpcode(addr, stream, this);
// addr = instr[addr].getNextAddr();
// }
// } catch (IOException ex) {
// throw new ClassFormatError(ex.toString());
// }
// for (int addr=0; addr<instr.length; ) {
// instr[addr].resolveJumps(instr);
// addr = instr[addr].getNextAddr();
// }
// handler = new TransformExceptionHandlers(instr);
// for (int i=0; i<handlers.length; i += 4) {
// Type type = null;
// if (handlers[i + 3 ] != 0) {
// CpoolClass cpcls = (CpoolClass)
// method.classAnalyzer.getConstant(handlers[i + 3]);
// type = Type.tClass(cpcls.getName().getString());
// }
// handler.addHandler(handlers[i + 0], handlers[i + 1],
// handlers[i + 2], type);
// }
// methodHeader = instr[0];
// }
public void analyze()
{
readCode(code);
handler.analyze();
methodHeader.analyze();
byte[] codeArray = code.getCode();
short[] handlers = Spy.getExceptionHandlers(code);
readCode(codeArray, handlers);
Enumeration enum = allLocals.elements();
while (enum.hasMoreElements()) {
LocalInfo li = (LocalInfo)enum.nextElement();
@ -157,4 +261,3 @@ public class CodeAnalyzer implements Analyzer {
return method.classAnalyzer.clazz;
}
}

14
jode/jode/expr/ComplexExpression.java
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@ -132,6 +132,10 @@ public class ComplexExpression extends Expression {
return subExpressions;
}
public void setSubExpressions(int i, Expression expr) {
subExpressions[i] = expr;
updateSubTypes();
}
void updateSubTypes() {
for (int i=0; i < subExpressions.length; i++) {
if (i == 0 && operator instanceof ArrayStoreOperator) {
@ -255,7 +259,7 @@ public class ComplexExpression extends Expression {
return new ComplexExpression
(new StringAddOperator(), new Expression[]
{ e, subExpressions[1] });
{ e, subExpressions[1].simplifyString() });
}
if (operator instanceof ConstructorOperator
&& (((ConstructorOperator) operator).getClassType()
@ -263,7 +267,7 @@ public class ComplexExpression extends Expression {
if (subExpressions.length == 1 &&
subExpressions[0].getType().isOfType(Type.tString))
return subExpressions[0];
return subExpressions[0].simplifyString();
}
return null;
}
@ -278,6 +282,7 @@ public class ComplexExpression extends Expression {
Expression simple = subExpressions[0].simplifyStringBuffer();
if (simple != null)
return simple;
}
else if (invoke.getMethodName().equals("valueOf")
&& invoke.isStatic()
@ -309,7 +314,7 @@ public class ComplexExpression extends Expression {
{ left, right });
}
}
return null;
return this;
}
public Expression simplify() {
@ -382,7 +387,7 @@ public class ComplexExpression extends Expression {
}
else {
Expression stringExpr = simplifyString();
if (stringExpr != null)
if (stringExpr != this)
return stringExpr.simplify();
}
for (int i=0; i< subExpressions.length; i++) {
@ -392,3 +397,4 @@ public class ComplexExpression extends Expression {
return this;
}
}

50
jode/jode/expr/ConstantArrayOperator.java
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@ -19,30 +19,56 @@
package jode;
public class ConstantArrayOperator extends SimpleOperator {
public class ConstantArrayOperator extends NoArgOperator {
ConstOperator empty;
Expression[] values;
Type argType;
public ConstantArrayOperator(Type type, int size) {
super(type, 0, size);
for (int i=0; i< size; i++)
operandTypes[i] = ((ArrayType)type).getElementType();
super(type);
values = new Expression[size];
argType = (type instanceof ArrayType)
? Type.tSubType(((ArrayType)type).getElementType()) : Type.tError;
empty = new ConstOperator(argType, "0");
}
public int getPriority() {
return 200;
public void setType(Type newtype) {
super.setType(newtype);
Type newArgType = (this.type instanceof ArrayType)
? Type.tSubType(((ArrayType)this.type).getElementType())
: Type.tError;
if (!newArgType.equals(argType)) {
argType = newArgType;
empty.setType(argType);
for (int i=0; i< values.length; i++)
if (values[i] != null)
values[i].setType(argType);
}
}
public int getOperandPriority(int i) {
return 0;
public boolean setValue(int index, Expression value) {
if (index < 0 || index > values.length || values[index] != null)
return false;
value.setType(argType);
setType(Type.tSuperType(Type.tArray(value.getType())));
values[index] = value;
value.parent = this;
return true;
}
public int getPriority() {
return 200;
}
public String toString(String[] operands) {
StringBuffer result
= new StringBuffer("new "+type+" {");
for (int i=0; i< getOperandCount(); i++) {
= new StringBuffer("new ").append(type).append(" { ");
for (int i=0; i< values.length; i++) {
if (i>0)
result.append(", ");
result.append(operands[i]);
result.append((values[i] != null) ? values[i] : empty);
}
return result.append("}").toString();
return result.append(" }").toString();
}
}

5
jode/jode/expr/ConstructorOperator.java
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@ -24,8 +24,9 @@ public class ConstructorOperator extends Operator {
MethodType methodType;
Type classType;
public ConstructorOperator(Type type, MethodType methodType) {
super(type, 0);
public ConstructorOperator(Type type, MethodType methodType,
boolean isVoid) {
super(isVoid ? Type.tVoid : type, 0);
this.classType = type;
this.methodType = methodType;
}

3
jode/jode/expr/Expression.java
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@ -107,6 +107,9 @@ public abstract class Expression {
public Expression simplify() {
return this;
}
public Expression simplifyString() {
return this;
}
static Expression EMPTYSTRING = new ConstOperator(Type.tString, "\"\"");

22
jode/jode/flow/CombineIfGotoExpressions.java
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@ -24,14 +24,14 @@ import jode.ComplexExpression;
import jode.Type;
import jode.BinaryOperator;
public class CombineIfGotoExpressions implements Transformation{
public class CombineIfGotoExpressions {
public boolean transform(FlowBlock flow) {
if (!(flow.lastModified instanceof ConditionalBlock)
|| !(flow.lastModified.outer instanceof SequentialBlock))
public static boolean transform(ConditionalBlock cb,
StructuredBlock last) {
if (cb.jump == null
|| !(last.outer instanceof SequentialBlock))
return false;
ConditionalBlock cb = (ConditionalBlock) flow.lastModified;
SequentialBlock sequBlock = (SequentialBlock) cb.outer;
Expression[] e = new Expression[2];
@ -77,6 +77,10 @@ public class CombineIfGotoExpressions implements Transformation{
} else
return false;
/* We have changed some instructions above. We may never
* return with a failure now.
*/
sequBlock = (SequentialBlock) cb.outer;
while (sequBlock.subBlocks[0] instanceof InstructionBlock) {
/* Now combine the expression. Everything should
@ -90,14 +94,14 @@ public class CombineIfGotoExpressions implements Transformation{
sequBlock = (SequentialBlock) sequBlock.outer;
}
flow.removeSuccessor(prevJump);
cb.flowBlock.removeSuccessor(prevJump);
prevJump.prev.removeJump();
Expression cond =
new ComplexExpression
(new BinaryOperator(Type.tBoolean, operator), e);
cb.setInstruction(cond);
cb.moveDefinitions(sequBlock, cb);
cb.replace(sequBlock);
cb.moveDefinitions(sequBlock, last);
last.replace(sequBlock);
return true;
}
return false;

20
jode/jode/flow/CompleteSynchronized.java
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@ -24,22 +24,20 @@ import jode.LocalLoadOperator;
import jode.LocalStoreOperator;
import jode.Expression;
public class CompleteSynchronized implements Transformation {
public class CompleteSynchronized {
/**
* This combines the monitorenter and the initial expression
* into a synchronized statement
* @param flow The FlowBlock that is transformed
*/
public boolean transform(FlowBlock flow) {
public static boolean transform(SynchronizedBlock synBlock,
StructuredBlock last) {
if (!(flow.lastModified instanceof SynchronizedBlock)
|| flow.lastModified.outer == null)
if (!(last.outer instanceof SequentialBlock))
return false;
/* If the program is well formed, the following succeed */
SynchronizedBlock synBlock = (SynchronizedBlock) flow.lastModified;
try {
SequentialBlock sequBlock = (SequentialBlock) synBlock.outer;
@ -59,11 +57,11 @@ public class CompleteSynchronized implements Transformation {
System.err.print('s');
synBlock.isEntered = true;
synBlock.moveDefinitions(synBlock.outer,synBlock);
synBlock.replace(synBlock.outer);
synBlock.moveDefinitions(last.outer,last);
last.replace(last.outer);
/* Is there another expression? */
if (synBlock.outer == null)
if (!(last.outer instanceof SynchronizedBlock))
return false;
Expression object;
@ -85,8 +83,8 @@ public class CompleteSynchronized implements Transformation {
}
synBlock.object = object;
synBlock.moveDefinitions(synBlock.outer,synBlock);
synBlock.replace(synBlock.outer);
synBlock.moveDefinitions(last.outer,last);
last.replace(last.outer);
return true;
}
}

7
jode/jode/flow/ConditionalBlock.java
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@ -76,4 +76,11 @@ public class ConditionalBlock extends InstructionContainer {
trueBlock.dumpSource(writer);
writer.untab();
}
public boolean doTransformations() {
StructuredBlock last = flowBlock.lastModified;
return super.doTransformations()
|| CombineIfGotoExpressions.transform(this, last)
|| CreateIfThenElseOperator.createFunny(this, last);
}
}

61
jode/jode/flow/CreateAssignExpression.java
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@ -20,21 +20,20 @@
package jode.flow;
import jode.*;
public class CreateAssignExpression implements Transformation{
public boolean transform(FlowBlock flow) {
if (!(flow.lastModified instanceof InstructionContainer)
|| !(flow.lastModified.outer instanceof SequentialBlock)
|| !(((InstructionContainer)flow.lastModified).getInstruction()
instanceof StoreInstruction)
|| !(((InstructionContainer)flow.lastModified).getInstruction()
.isVoid()))
public class CreateAssignExpression {
public static boolean transform(InstructionContainer ic,
StructuredBlock last) {
if (!(last.outer instanceof SequentialBlock)
|| !(ic.getInstruction() instanceof StoreInstruction)
|| !(ic.getInstruction().isVoid()))
return false;
return (createAssignOp(flow) || createAssignExpression(flow));
return (createAssignOp(ic, last) || createAssignExpression(ic, last));
}
public boolean createAssignOp(FlowBlock flow) {
public static boolean createAssignOp(InstructionContainer ic,
StructuredBlock last) {
/* Situation:
*
@ -53,11 +52,8 @@ public class CreateAssignExpression implements Transformation{
*
* If the optional dup is present the store*= becomes non void.
*/
InstructionContainer lastBlock
= (InstructionContainer) flow.lastModified;
SequentialBlock opBlock = (SequentialBlock) lastBlock.outer;
StoreInstruction store
= (StoreInstruction) lastBlock.getInstruction();
SequentialBlock opBlock = (SequentialBlock) last.outer;
StoreInstruction store = (StoreInstruction) ic.getInstruction();
boolean isAssignOp = false;
if (opBlock.subBlocks[0] instanceof SpecialBlock) {
@ -93,7 +89,13 @@ public class CreateAssignExpression implements Transformation{
int opIndex;
Expression rightHandSide;
if (expr.getOperator() instanceof ConvertOperator
&& expr.getSubExpressions()[0] instanceof ComplexExpression
&& expr.getOperator().getType().isOfType(store.getLValueType())) {
expr = (ComplexExpression) expr.getSubExpressions()[0];
}
if (expr.getOperator() instanceof BinaryOperator) {
BinaryOperator binop = (BinaryOperator) expr.getOperator();
@ -109,24 +111,24 @@ public class CreateAssignExpression implements Transformation{
Expression simple = expr.simplifyString();
rightHandSide = simple;
/* Now search for the leftmost operand ... */
ComplexExpression last = null;
ComplexExpression lastExpr = null;
while (simple instanceof ComplexExpression
&& simple.getOperator() instanceof StringAddOperator) {
last = (ComplexExpression) simple;
simple = last.getSubExpressions()[0];
lastExpr = (ComplexExpression) simple;
simple = lastExpr.getSubExpressions()[0];
}
/* ... check it ... */
if (last == null || !(simple instanceof Operator)
if (lastExpr == null || !(simple instanceof Operator)
|| !store.matches((Operator) simple))
return false;
/* ... and remove it. */
if (last.getParent() != null) {
((ComplexExpression)last.getParent()).getSubExpressions()[0]
= last.getSubExpressions()[1];
if (lastExpr.getParent() != null) {
((ComplexExpression)lastExpr.getParent())
.setSubExpressions(0,lastExpr.getSubExpressions()[1]);
} else
rightHandSide = last.getSubExpressions()[1];
rightHandSide = lastExpr.getSubExpressions()[1];
opIndex = Operator.ADD_OP;
}
@ -137,20 +139,19 @@ public class CreateAssignExpression implements Transformation{
if (isAssignOp)
store.makeNonVoid();
lastBlock.replace(opBlock.subBlocks[1]);
last.replace(opBlock.subBlocks[1]);
return true;
}
public boolean createAssignExpression(FlowBlock flow) {
public static boolean createAssignExpression(InstructionContainer ic,
StructuredBlock last) {
/* Situation:
* sequBlock:
* dup_X(lvalue_count)
* store instruction
*/
InstructionContainer lastBlock
= (InstructionContainer) flow.lastModified;
SequentialBlock sequBlock = (SequentialBlock) lastBlock.outer;
StoreInstruction store = (StoreInstruction) lastBlock.getInstruction();
SequentialBlock sequBlock = (SequentialBlock) last.outer;
StoreInstruction store = (StoreInstruction) ic.getInstruction();
if (sequBlock.subBlocks[0] instanceof SpecialBlock) {

180
jode/jode/flow/CreateConstantArray.java
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@ -26,104 +26,106 @@ import jode.ConstantArrayOperator;
import jode.ConstOperator;
import jode.Type;
public class CreateConstantArray implements Transformation {
public class CreateConstantArray {
public boolean transform(FlowBlock flow) {
InstructionBlock lastBlock;
SequentialBlock sequBlock;
Expression[] consts = null;
int count = 0;
Type type;
try {
InstructionBlock ib = (InstructionBlock) flow.lastModified;
sequBlock = (SequentialBlock) ib.outer;
ib = (InstructionBlock) sequBlock.subBlocks[0];
lastBlock = ib;
public static boolean transform(InstructionContainer ic,
StructuredBlock last) {
/* Situation:
* PUSH new Array[]
* DUP
* PUSH index
* PUSH value
* stack_2[stack_1] = stack_0
* ...
*/
if (last.outer instanceof SequentialBlock) {
int lastindex = -1;
while (ib.getInstruction() instanceof ArrayStoreOperator) {
ArrayStoreOperator store =
(ArrayStoreOperator) ib.getInstruction();
SequentialBlock sequBlock = (SequentialBlock) last.outer;
sequBlock = (SequentialBlock) sequBlock.outer;
ib = (InstructionBlock) sequBlock.subBlocks[0];
Expression lastconst = ib.getInstruction();
sequBlock = (SequentialBlock) sequBlock.outer;
ib = (InstructionBlock) sequBlock.subBlocks[0];
Expression indexexpr = ib.getInstruction();
ConstOperator indexop =
(ConstOperator) indexexpr.getOperator();
if (!indexop.getType().isOfType(Type.tUInt))
return false;
int index = Integer.parseInt(indexop.getValue());
if (index >= 0 && consts == null) {
lastindex = index;
consts = new Expression[lastindex+1];
} else if (index < 0 || index > lastindex)
return false;
else {
while (index < lastindex) {
consts[lastindex--] =
new ConstOperator(Type.tUnknown, "0");
}
}
consts[lastindex--] = lastconst;
sequBlock = (SequentialBlock) sequBlock.outer;
if (!(ic.getInstruction() instanceof ArrayStoreOperator)
|| !(sequBlock.subBlocks[0] instanceof InstructionBlock)
|| !(sequBlock.outer instanceof SequentialBlock))
return false;
ArrayStoreOperator store
= (ArrayStoreOperator) ic.getInstruction();
InstructionBlock ib = (InstructionBlock)sequBlock.subBlocks[0];
sequBlock = (SequentialBlock) sequBlock.outer;
SpecialBlock dup = (SpecialBlock) sequBlock.subBlocks[0];
if (dup.type != SpecialBlock.DUP
|| dup.depth != 0
|| dup.count != store.getLValueType().stackSize())
return false;
count++;
sequBlock = (SequentialBlock) sequBlock.outer;
ib = (InstructionBlock) sequBlock.subBlocks[0];
}
if (count == 0)
if (!(sequBlock.subBlocks[0] instanceof InstructionBlock)
|| !(sequBlock.outer instanceof SequentialBlock))
return false;
while (lastindex >= 0)
consts[lastindex--] = new ConstOperator(Type.tUnknown, "0");
ComplexExpression newArrayExpr =
(ComplexExpression) ib.getInstruction();
NewArrayOperator newArrayOp =
(NewArrayOperator) newArrayExpr.getOperator();
type = newArrayOp.getType();
if (newArrayOp.getOperandCount() != 1)
Expression expr = ib.getInstruction();
ib = (InstructionBlock)sequBlock.subBlocks[0];
sequBlock = (SequentialBlock) sequBlock.outer;
if (expr.getOperandCount() > 0
|| !(ib.getInstruction() instanceof ConstOperator)
|| !(sequBlock.subBlocks[0] instanceof SpecialBlock)
|| !(sequBlock.outer instanceof SequentialBlock))
return false;
Expression countexpr = newArrayExpr.getSubExpressions()[0];
ConstOperator countop =
(ConstOperator) countexpr.getOperator();
if (!countop.getType().isOfType(Type.tUInt))
ConstOperator indexOp = (ConstOperator) ib.getInstruction();
SpecialBlock dup = (SpecialBlock) sequBlock.subBlocks[0];
sequBlock = (SequentialBlock) sequBlock.outer;
if (!indexOp.getType().isOfType(Type.tUInt)
|| dup.type != SpecialBlock.DUP
|| dup.depth != 0
|| dup.count != store.getLValueType().stackSize()
|| !(sequBlock.subBlocks[0] instanceof InstructionBlock))
return false;
int arraylength = Integer.parseInt(countop.getValue());
if (arraylength != consts.length) {
if (arraylength < consts.length)
int index = Integer.parseInt(indexOp.getValue());
ib = (InstructionBlock)sequBlock.subBlocks[0];
if (ib.getInstruction() instanceof ComplexExpression
&& (ib.getInstruction().getOperator()
instanceof NewArrayOperator)) {
/* This is the first element */
ComplexExpression newArrayExpr =
(ComplexExpression) ib.getInstruction();
NewArrayOperator newArrayOp =
(NewArrayOperator) newArrayExpr.getOperator();
if (newArrayOp.getOperandCount() != 1
|| !(newArrayExpr.getSubExpressions()[0]
instanceof ConstOperator))
return false;
ConstOperator countop =
(ConstOperator) newArrayExpr.getSubExpressions()[0];
if (!countop.getType().isOfType(Type.tUInt))
return false;
int arraylength = Integer.parseInt(countop.getValue());
if (arraylength <= index)
return false;
Expression[] newConsts = new Expression[arraylength];
System.arraycopy(consts, 0, newConsts, 0, consts.length);
for (int i=consts.length; i<arraylength; i++)
newConsts[i] = new ConstOperator(Type.tUnknown, "0");
consts = newConsts;
if (jode.Decompiler.isVerbose)
System.err.print('a');
ConstantArrayOperator cao
= new ConstantArrayOperator(newArrayOp.getType(),
arraylength);
cao.setValue(index, expr);
ic.setInstruction(cao);
ic.moveDefinitions(sequBlock, last);
last.replace(sequBlock);
return true;
} else if (ib.getInstruction() instanceof ConstantArrayOperator) {
ConstantArrayOperator cao
= (ConstantArrayOperator) ib.getInstruction();
if (cao.setValue(index, expr)) {
/* adding Element succeeded */
ic.setInstruction(cao);
ic.moveDefinitions(sequBlock, last);
last.replace(sequBlock);
return true;
}
}
} catch (NullPointerException ex) {
return false;
} catch (ClassCastException ex) {
return false;
}
if (jode.Decompiler.isVerbose)
System.err.print("a");
lastBlock.setInstruction
(new ComplexExpression
(new ConstantArrayOperator(type, consts.length),
consts));
lastBlock.moveDefinitions(sequBlock.subBlocks[0], lastBlock);
lastBlock.replace(sequBlock.subBlocks[0]);
flow.lastModified.moveDefinitions(sequBlock.subBlocks[1],
flow.lastModified);
flow.lastModified.replace(sequBlock.subBlocks[1]);
return true;
return false;
}
}

156
jode/jode/flow/CreateExpression.java
Unescape View File

@ -19,6 +19,7 @@
package jode.flow;
import jode.Operator;
import jode.NopOperator;
import jode.Expression;
import jode.ComplexExpression;
@ -32,88 +33,103 @@ import jode.ComplexExpression;
* expr(op, [ expr_1, ..., expr_n ])
* </pre>
*/
public class CreateExpression implements Transformation {
public class CreateExpression {
/**
* This does the transformation.
* @param FlowBlock the flow block to transform.
* @return true if flow block was simplified.
*/
public boolean transform(FlowBlock flow) {
if (!(flow.lastModified instanceof InstructionContainer)
|| !(flow.lastModified.outer instanceof SequentialBlock))
public static boolean transform(InstructionContainer ic,
StructuredBlock last) {
int params = ic.getInstruction().getOperandCount();
if (params == 0)
return false;
ComplexExpression parent = null;
Expression inner = ic.getInstruction();
while (inner instanceof ComplexExpression) {
parent = (ComplexExpression)inner;
inner = parent.getSubExpressions()[0];
}
if (!(inner instanceof Operator))
return false;
Operator op = (Operator)inner;
if (!(last.outer instanceof SequentialBlock))
return false;
SequentialBlock sequBlock = (SequentialBlock)last.outer;
/* First check if Expression can be created, but do nothing yet.
*/
Expression lastExpression = null;
for (int i = params;;) {
if (!(sequBlock.subBlocks[0] instanceof InstructionBlock))
return false;
Expression expr =
((InstructionBlock) sequBlock.subBlocks[0]).getInstruction();
if (!expr.isVoid()) {
if (--i == 0)
break;
} else if (lastExpression == null
|| lastExpression.canCombine(expr) <= 0)
return false;
InstructionContainer ic = (InstructionContainer) flow.lastModified;
if (ic.getInstruction() instanceof Operator) {
if (expr.getOperandCount() > 0)
/* This is a not fully resolved expression in the
* middle, we must not touch it. */
return false;
Operator op = (Operator) ic.getInstruction();
int params = op.getOperandCount();
if (params == 0)
lastExpression = expr;
if (!(sequBlock.outer instanceof SequentialBlock))
return false;
sequBlock = (SequentialBlock) sequBlock.outer;
}
Expression[] exprs = new Expression[params];
SequentialBlock sequBlock = (SequentialBlock) ic.outer;
Expression lastExpression = null;
/* First check if Expression can be created, but do nothing yet.
*/
for (int i=params; ;) {
if (!(sequBlock.subBlocks[0] instanceof InstructionBlock))
return false;
InstructionBlock block =
(InstructionBlock) sequBlock.subBlocks[0];
Expression expr = block.getInstruction();
if (!expr.isVoid()) {
if (--i == 0)
break;
} else if (lastExpression != null
&& lastExpression.canCombine(expr) <= 0)
return false;
if (expr.getOperandCount() > 0)
/* This is a not fully resolved expression in the
* middle, we must not touch it. */
return false;
lastExpression = expr;
if (!(sequBlock.outer instanceof SequentialBlock))
return false;
sequBlock = (SequentialBlock)sequBlock.outer;
}
/* Now, do the combination. Everything must succeed now.
*/
sequBlock = (SequentialBlock) ic.outer;
for (int i=params; ;) {
InstructionBlock block =
(InstructionBlock) sequBlock.subBlocks[0];
Expression expr = block.getInstruction();
if (!expr.isVoid()) {
exprs[--i] = expr;
if (i == 0)
break;
} else
exprs[i] = exprs[i].combine(expr);
sequBlock = (SequentialBlock)sequBlock.outer;
}
if(jode.Decompiler.isVerbose)
System.err.print('x');
/* Now, do the combination. Everything must succeed now.
*/
Expression[] exprs = new Expression[params];
sequBlock = (SequentialBlock) last.outer;
for (int i=params; ;) {
Expression expr =
((InstructionBlock) sequBlock.subBlocks[0]).getInstruction();
if (!expr.isVoid()) {
exprs[--i] = expr;
if (i == 0)
break;
} else
exprs[i] = exprs[i].combine(expr);
ic.setInstruction(new ComplexExpression(op, exprs));
ic.moveDefinitions(sequBlock, ic);
ic.replace(sequBlock);
return true;
sequBlock = (SequentialBlock)sequBlock.outer;
}
return false;
if(jode.Decompiler.isVerbose)
System.err.print('x');
Expression newExpr;
if (params == 1 && op instanceof NopOperator) {
exprs[0].setType(op.getType());
newExpr = exprs[0];
} else
newExpr = new ComplexExpression(op, exprs);
if (parent != null)
parent.setSubExpressions(0, newExpr);
else
ic.setInstruction(newExpr);
ic.moveDefinitions(sequBlock, last);
last.replace(sequBlock);
return true;
}
}

20
jode/jode/flow/CreateForInitializer.java
Unescape View File

@ -21,23 +21,19 @@ package jode.flow;
import jode.Expression;
import jode.StoreInstruction;
public class CreateForInitializer implements Transformation {
public class CreateForInitializer {
/**
* This combines an variable initializer into a for statement
* @param flow The FlowBlock that is transformed
* @param forBlock the for block
* @param last the lastModified of the flow block.
*/
public boolean transform(FlowBlock flow) {
public static boolean transform(LoopBlock forBlock, StructuredBlock last) {
if (!(flow.lastModified instanceof LoopBlock)
|| !(flow.lastModified.outer instanceof SequentialBlock))
if (!(last.outer instanceof SequentialBlock))
return false;
LoopBlock forBlock = (LoopBlock) flow.lastModified;
if (forBlock.type != forBlock.FOR || forBlock.init != null)
return false;
SequentialBlock sequBlock = (SequentialBlock) forBlock.outer;
SequentialBlock sequBlock = (SequentialBlock) last.outer;
if (!(sequBlock.subBlocks[0] instanceof InstructionBlock))
return false;
@ -53,8 +49,8 @@ public class CreateForInitializer implements Transformation {
System.err.print('f');
forBlock.init = initializer;
forBlock.moveDefinitions(forBlock.outer, forBlock);
forBlock.replace(forBlock.outer);
forBlock.moveDefinitions(last.outer, null);
last.replace(last.outer);
return true;
}
}

260
jode/jode/flow/CreateIfThenElseOperator.java
Unescape View File

@ -20,24 +20,109 @@
package jode.flow;
import jode.Type;
import jode.Expression;
import jode.ConstOperator;
import jode.ComplexExpression;
import jode.IfThenElseOperator;
import jode.CompareUnaryOperator;
import java.util.Enumeration;
import java.util.Vector;
public class CreateIfThenElseOperator implements Transformation {
public class CreateIfThenElseOperator {
/**
* This handles the body of createFunny. There are three cases:
*
* <pre>
* --------
* IF (c2)
* GOTO trueDest -> PUSH c2
* PUSH false
* --------
* PUSH bool -> PUSH bool
* --------
* if (c2)
* (handled recursively) -> PUSH (c2 ? expr1 : expr2)
* else
* (handled recursively)
* --------
* </pre>
*/
private static boolean createFunnyHelper(FlowBlock trueDest,
FlowBlock falseDest,
StructuredBlock block) {
if (block instanceof InstructionBlock
&& !((InstructionBlock)block).getInstruction().isVoid())
return true;
if (block instanceof IfThenElseBlock) {
IfThenElseBlock ifBlock = (IfThenElseBlock) block;
Expression expr1, expr2;
if (ifBlock.elseBlock == null)
return false;
if (!createFunnyHelper(trueDest, falseDest, ifBlock.thenBlock)
| !createFunnyHelper(trueDest, falseDest, ifBlock.elseBlock))
return false;
if (jode.Decompiler.isVerbose)
System.err.print('?');
IfThenElseOperator iteo = new IfThenElseOperator(Type.tBoolean);
((InstructionBlock)ifBlock.thenBlock).setInstruction
(new ComplexExpression
(iteo, new Expression[] {
ifBlock.cond,
((InstructionBlock) ifBlock.thenBlock).getInstruction(),
((InstructionBlock) ifBlock.elseBlock).getInstruction()
}));
ifBlock.thenBlock.moveDefinitions(ifBlock, null);
ifBlock.thenBlock.replace(ifBlock);
return true;
}
if (block instanceof SequentialBlock
&& block.getSubBlocks()[0] instanceof ConditionalBlock
&& block.getSubBlocks()[1] instanceof InstructionBlock) {
ConditionalBlock condBlock =
(ConditionalBlock) block.getSubBlocks()[0];
InstructionBlock pushBlock =
(InstructionBlock) block.getSubBlocks()[1];
if (!(pushBlock.getInstruction() instanceof ConstOperator))
return false;
ConstOperator constOp =
(ConstOperator) pushBlock.getInstruction();
if (condBlock.trueBlock.jump.destination == trueDest
&& constOp.getValue().equals("0")) {
Expression cond = condBlock.getInstruction();
condBlock.flowBlock.removeSuccessor(condBlock.trueBlock.jump);
condBlock.trueBlock.removeJump();
pushBlock.setInstruction(cond);
pushBlock.moveDefinitions(block, null);
pushBlock.replace(block);
return true;
}
}
return false;
}
/**
* This handles the more complicated form of the ?-:-operator used
* in a conditional block. The simplest case is:
* <pre>
* if (cond)
* push e1
* PUSH e1
* else {
* IF (c2)
* GOTO flow_2_
* push 0
* PUSH false
* }
* -&gt;IF (stack_0 == 0)
* GOTO flow_1_
@ -60,104 +145,35 @@ public class CreateIfThenElseOperator implements Transformation {
* sometimes be better replaced with a correct jump.
* @param flow The FlowBlock that is transformed
*/
public boolean createFunny(FlowBlock flow) {
public static boolean createFunny(ConditionalBlock cb,
StructuredBlock last) {
if (!(flow.lastModified instanceof ConditionalBlock))
return false;
ConditionalBlock conditional = (ConditionalBlock) flow.lastModified;
if (!(conditional.trueBlock instanceof EmptyBlock)
|| conditional.trueBlock.jump == null
|| conditional.jump == null
|| !(conditional.getInstruction() instanceof CompareUnaryOperator))
if (cb.jump == null
|| !(cb.getInstruction() instanceof CompareUnaryOperator)
|| !(last.outer instanceof SequentialBlock)
|| !(last.outer.getSubBlocks()[0] instanceof IfThenElseBlock))
return false;
CompareUnaryOperator compare =
(CompareUnaryOperator) conditional.getInstruction();
(CompareUnaryOperator) cb.getInstruction();
FlowBlock trueDestination;
if (compare.getOperatorIndex() == compare.EQUALS_OP)
trueDestination = conditional.jump.destination;
else if (compare.getOperatorIndex() == compare.NOTEQUALS_OP)
trueDestination = conditional.trueBlock.jump.destination;
else
FlowBlock falseDestination;
if (compare.getOperatorIndex() == compare.EQUALS_OP) {
trueDestination = cb.jump.destination;
falseDestination = cb.trueBlock.jump.destination;
} else if (compare.getOperatorIndex() == compare.NOTEQUALS_OP) {
falseDestination = cb.jump.destination;
trueDestination = cb.trueBlock.jump.destination;
} else
return false;
Expression[] e = new Expression[3];
IfThenElseBlock ifBlock;
try {
SequentialBlock sequBlock =
(SequentialBlock) conditional.outer;
ifBlock = (IfThenElseBlock) sequBlock.subBlocks[0];
while (true) {
if (ifBlock.thenBlock instanceof IfThenElseBlock)
ifBlock = (IfThenElseBlock) ifBlock.thenBlock;
else if (ifBlock.elseBlock instanceof IfThenElseBlock)
ifBlock = (IfThenElseBlock) ifBlock.elseBlock;
else
break;
}
e[0] = ifBlock.cond;
StructuredBlock[] subBlocks = ifBlock.getSubBlocks();
if (subBlocks.length != 2)
return false;
for (int i=0; i< 2; i++) {
if (subBlocks[i] instanceof InstructionBlock) {
e[i+1] = ((InstructionBlock)subBlocks[i]).getInstruction();
continue;
}
sequBlock = (SequentialBlock) subBlocks[i];
ConditionalBlock condBlock =
(ConditionalBlock) sequBlock.subBlocks[0];
InstructionBlock pushBlock =
(InstructionBlock) sequBlock.subBlocks[1];
jode.ConstOperator zero =
(jode.ConstOperator) pushBlock.getInstruction();
if (!zero.getValue().equals("0"))
return false;
if (!(condBlock.trueBlock instanceof EmptyBlock)
|| condBlock.trueBlock.jump == null
|| condBlock.jump != null
|| condBlock.trueBlock.jump.destination
!= trueDestination)
return false;
Expression cond = condBlock.getInstruction();
flow.removeSuccessor(condBlock.trueBlock.jump);
condBlock.trueBlock.removeJump();
pushBlock.setInstruction(cond);
pushBlock.moveDefinitions(sequBlock, pushBlock);
pushBlock.replace(sequBlock);
e[i+1] = cond;
}
} catch (ClassCastException ex) {
return false;
} catch (NullPointerException ex) {
return false;
}
if (jode.Decompiler.isVerbose)
System.err.print('?');
IfThenElseOperator iteo = new IfThenElseOperator
(Type.tSuperType(e[1].getType())
.intersection(Type.tSuperType(e[2].getType())));
((InstructionBlock)ifBlock.thenBlock).
setInstruction(new ComplexExpression(iteo, e));
ifBlock.thenBlock.moveDefinitions(ifBlock, ifBlock.thenBlock);
ifBlock.thenBlock.replace(ifBlock);
return true;
SequentialBlock sequBlock = (SequentialBlock) last.outer;
return createFunnyHelper(trueDestination, falseDestination,
sequBlock.subBlocks[0]);
}
/**
@ -176,57 +192,47 @@ public class CreateIfThenElseOperator implements Transformation {
* The <code>-&gt;</code> points to the lastModified block.
* @param flow The FlowBlock that is transformed
*/
public boolean create(FlowBlock flow) {
public static boolean create(InstructionContainer ic,
StructuredBlock last) {
Expression e[] = new Expression[3];
InstructionBlock thenBlock;
try {
InstructionBlock elseBlock = (InstructionBlock) flow.lastModified;
SequentialBlock sequBlock = (SequentialBlock)elseBlock.outer;
if (sequBlock.subBlocks[1] != elseBlock)
return false;
IfThenElseBlock ifBlock = (IfThenElseBlock)sequBlock.subBlocks[0];
if (ifBlock.elseBlock != null)
return false;
thenBlock = (InstructionBlock) ifBlock.thenBlock;
if (thenBlock.jump.destination != elseBlock.jump.destination)
return false;
e[1] = thenBlock.getInstruction();
if (e[1].isVoid())
return false;
e[2] = elseBlock.getInstruction();
if (e[2].isVoid())
return false;
e[0] = ifBlock.cond;
} catch (ClassCastException ex) {
if (ic.jump == null
|| !(last.outer instanceof SequentialBlock))
return false;
} catch (NullPointerException ex) {
SequentialBlock sequBlock = (SequentialBlock)last.outer;
if (!(sequBlock.subBlocks[0] instanceof IfThenElseBlock))
return false;
}
IfThenElseBlock ifBlock = (IfThenElseBlock)sequBlock.subBlocks[0];
if (!(ifBlock.thenBlock instanceof InstructionBlock)
|| ifBlock.thenBlock.jump == null
|| ifBlock.thenBlock.jump.destination != ic.jump.destination
|| ifBlock.elseBlock != null)
return false;
thenBlock = (InstructionBlock) ifBlock.thenBlock;
e[1] = thenBlock.getInstruction();
if (e[1].isVoid())
return false;
e[2] = ic.getInstruction();
if (e[2].isVoid())
return false;
e[0] = ifBlock.cond;
if (jode.Decompiler.isVerbose)
System.err.print('?');
flow.removeSuccessor(thenBlock.jump);
thenBlock.flowBlock.removeSuccessor(thenBlock.jump);
thenBlock.removeJump();
IfThenElseOperator iteo = new IfThenElseOperator
(Type.tSuperType(e[1].getType())
.intersection(Type.tSuperType(e[2].getType())));
((InstructionBlock)flow.lastModified).
setInstruction(new ComplexExpression(iteo, e));
flow.lastModified.moveDefinitions(flow.lastModified.outer, null);
flow.lastModified.replace(flow.lastModified.outer);
ic.setInstruction(new ComplexExpression(iteo, e));
ic.moveDefinitions(last.outer, last);
last.replace(last.outer);
return true;
}
public boolean transform(FlowBlock flow) {
return createFunny(flow) || create(flow);
}
}

71
jode/jode/flow/CreateNewConstructor.java
Unescape View File

@ -24,13 +24,14 @@ import jode.ComplexExpression;
import jode.ConstructorOperator;
import jode.NewOperator;
public class CreateNewConstructor implements Transformation{
public class CreateNewConstructor {
public boolean transform(FlowBlock flow) {
public static boolean transform(InstructionContainer ic,
StructuredBlock last) {
/* Situation:
*
* new <object>
* DUP
* (optional DUP)
* PUSH load_ops
* optionally: <= used for "string1 += string2"
* DUP_X2
@ -43,23 +44,21 @@ public class CreateNewConstructor implements Transformation{
* optionally:
* DUP_X1 <= remove the depth
* [ n non void + some void expressions ]
* PUSH new <object>(stack_n-1,...,stack_0)
* (optional PUSH) new <object>(stack_n-1,...,stack_0)
*/
if (!(flow.lastModified instanceof InstructionBlock)
|| !(flow.lastModified.outer instanceof SequentialBlock))
if (!(last.outer instanceof SequentialBlock))
return false;
InstructionBlock block = (InstructionBlock) flow.lastModified;
if (!(block.getInstruction() instanceof InvokeOperator))
if (!(ic.getInstruction() instanceof InvokeOperator))
return false;
InvokeOperator constrCall = (InvokeOperator) block.getInstruction();
InvokeOperator constrCall = (InvokeOperator) ic.getInstruction();
if (!constrCall.isConstructor())
return false;
/* The rest should probably succeed */
int params = constrCall.getOperandCount() - 1;
SpecialBlock optDup = null;
SequentialBlock sequBlock = (SequentialBlock) block.outer;
SpecialBlock optDupX2 = null;
SequentialBlock sequBlock = (SequentialBlock) last.outer;
while (params > 0) {
if (!(sequBlock.subBlocks[0] instanceof InstructionBlock))
return false;
@ -74,11 +73,11 @@ public class CreateNewConstructor implements Transformation{
instanceof SpecialBlock) {
/* handle the optional dup */
sequBlock = (SequentialBlock) sequBlock.outer;
optDup = (SpecialBlock) sequBlock.subBlocks[0];
if (optDup.type != SpecialBlock.DUP
|| optDup.depth != 2)
optDupX2 = (SpecialBlock) sequBlock.subBlocks[0];
if (optDupX2.type != SpecialBlock.DUP
|| optDupX2.depth != 2)
return false;
params = optDup.count;
params = optDupX2.count;
} else
return false;
}
@ -93,34 +92,36 @@ public class CreateNewConstructor implements Transformation{
&& sequBlock.outer instanceof SequentialBlock)
sequBlock = (SequentialBlock) sequBlock.outer;
SpecialBlock dup = null;
if (sequBlock.outer instanceof SequentialBlock
&& sequBlock.subBlocks[0] instanceof SpecialBlock) {
SpecialBlock dup = (SpecialBlock) sequBlock.subBlocks[0];
dup = (SpecialBlock) sequBlock.subBlocks[0];
if (dup.type != SpecialBlock.DUP
|| dup.count != 1 || dup.depth != 0)
return false;
sequBlock = (SequentialBlock)sequBlock.outer;
if (!(sequBlock.subBlocks[0] instanceof InstructionBlock))
return false;
block = (InstructionBlock) sequBlock.subBlocks[0];
if (!(block.getInstruction() instanceof NewOperator))
return false;
NewOperator op = (NewOperator) block.getInstruction();
if (constrCall.getClassType() != op.getType())
return false;
}
block.removeBlock();
if (!(sequBlock.subBlocks[0] instanceof InstructionBlock))
return false;
InstructionBlock block = (InstructionBlock) sequBlock.subBlocks[0];
if (!(block.getInstruction() instanceof NewOperator))
return false;
NewOperator op = (NewOperator) block.getInstruction();
if (constrCall.getClassType() != op.getType())
return false;
block.removeBlock();
if (dup != null)
dup.removeBlock();
if (optDup != null)
optDup.depth = 0;
((InstructionContainer) flow.lastModified).setInstruction
(new ConstructorOperator(constrCall.getClassType(),
constrCall.getMethodType()));
return true;
}
return false;
if (optDupX2 != null)
optDupX2.depth = 0;
ic.setInstruction(new ConstructorOperator(constrCall.getClassType(),
constrCall.getMethodType(),
dup == null));
return true;
}
}

215
jode/jode/flow/CreatePrePostIncExpression.java
Unescape View File

@ -20,30 +20,28 @@
package jode.flow;
import jode.*;
public class CreatePrePostIncExpression implements Transformation {
public class CreatePrePostIncExpression {
public boolean transform(FlowBlock flow)
public static boolean transform(InstructionContainer ic,
StructuredBlock last)
{
return (createLocalPrePostInc(flow) || createPostInc(flow));
return (createLocalPrePostInc(ic, last) || createPostInc(ic, last));
}
public boolean createLocalPrePostInc(FlowBlock flow) {
IIncOperator iinc;
boolean isPost;
int op;
InstructionContainer lastBlock;
Type type;
try {
lastBlock = (InstructionContainer) flow.lastModified;
Expression instr2 = lastBlock.getInstruction();
SequentialBlock sequBlock = (SequentialBlock)lastBlock.outer;
if (sequBlock.subBlocks[1] != lastBlock)
return false;
InstructionBlock ib = (InstructionBlock) sequBlock.subBlocks[0];
Expression instr1 = ib.getInstruction();
public static boolean createLocalPrePostInc(InstructionContainer ic,
StructuredBlock last) {
if (last.outer instanceof SequentialBlock
&& last.outer.getSubBlocks()[0] instanceof InstructionBlock) {
Expression instr1 = ((InstructionBlock)
last.outer.getSubBlocks()[0])
.getInstruction();
Expression instr2 = ic.getInstruction();
IIncOperator iinc;
LocalLoadOperator load;
boolean isPost;
if (instr1 instanceof IIncOperator
&& instr2 instanceof LocalLoadOperator) {
iinc = (IIncOperator) instr1;
@ -57,6 +55,7 @@ public class CreatePrePostIncExpression implements Transformation {
} else
return false;
int op;
if (iinc.getOperatorIndex() == iinc.ADD_OP + iinc.OPASSIGN_OP)
op = Operator.INC_OP;
else if (iinc.getOperatorIndex() == iinc.NEG_OP + iinc.OPASSIGN_OP)
@ -72,94 +71,124 @@ public class CreatePrePostIncExpression implements Transformation {
if (!iinc.matches(load))
return false;
type = load.getType().intersection(Type.tUInt);
} catch (NullPointerException ex) {
return false;
} catch (ClassCastException ex) {
return false;
Type type = load.getType().intersection(Type.tUInt);
Operator ppop =
new LocalPrePostFixOperator(type, op, iinc, isPost);
ic.setInstruction(ppop);
ic.moveDefinitions(last.outer, last);
last.replace(last.outer);
return true;
}
Operator ppop = new LocalPrePostFixOperator(type, op, iinc, isPost);
lastBlock.setInstruction(ppop);
lastBlock.moveDefinitions(lastBlock.outer, lastBlock);
lastBlock.replace(lastBlock.outer);
return true;
return false;
}
public boolean createPostInc(FlowBlock flow) {
StoreInstruction store;
int op;
Type type;
InstructionBlock lastBlock;
SequentialBlock sequBlock;
try {
lastBlock = (InstructionBlock) flow.lastModified;
Expression storeExpr = lastBlock.getInstruction();
store = (StoreInstruction) storeExpr.getOperator();
if (!store.isVoid())
return false;
public static boolean createPostInc(InstructionContainer ic,
StructuredBlock last) {
/* Situation:
*
* PUSH load/storeOps PUSH load/storeOps
* DUP load/storeOps PUSH store++/--
* load (unresolved)
* DUP ->
* PUSH +/-1
* IADD/SUB
* store (unresolved)
*
* load (no params) -> PUSH store++/--
* DUP
* PUSH +/-1
* store IADD/SUB
*/
if (!(ic.getInstruction().getOperator() instanceof StoreInstruction)
|| !(ic.getInstruction().isVoid()))
return false;
StoreInstruction store =
(StoreInstruction) ic.getInstruction().getOperator();
sequBlock = (SequentialBlock) lastBlock.outer;
if (sequBlock.subBlocks[1] != lastBlock)
return false;
BinaryOperator binOp;
InstructionBlock ib;
if (store.getLValueOperandCount() > 0) {
ib = (InstructionBlock) sequBlock.subBlocks[0];
binOp = (BinaryOperator) ib.getInstruction();
sequBlock = (SequentialBlock) sequBlock.outer;
} else
binOp = (BinaryOperator)
((ComplexExpression) storeExpr).getSubExpressions()[0];
if (!(last.outer instanceof SequentialBlock))
return false;
SequentialBlock sb = (SequentialBlock)last.outer;
if (binOp.getOperatorIndex() == store.ADD_OP)
op = Operator.INC_OP;
else if (store.getOperatorIndex() == store.NEG_OP)
op = Operator.DEC_OP;
else
Expression binOp;
if (store.getLValueOperandCount() == 0) {
if (!(ic.getInstruction() instanceof ComplexExpression))
return false;
ib = (InstructionBlock) sequBlock.subBlocks[0];
ConstOperator constOp = (ConstOperator) ib.getInstruction();
if (!constOp.getValue().equals("1") &&
!constOp.getValue().equals("-1"))
return false;
if (constOp.getValue().equals("-1"))
op ^= 1;
sequBlock = (SequentialBlock) sequBlock.outer;
SpecialBlock dup = (SpecialBlock) sequBlock.subBlocks[0];
if (dup.type != SpecialBlock.DUP
|| dup.count != store.getLValueType().stackSize()
|| dup.depth != store.getLValueOperandCount())
binOp = ((ComplexExpression) ic.getInstruction())
.getSubExpressions()[0];
} else {
if (!(sb.subBlocks[0] instanceof InstructionBlock)
|| !(sb.outer instanceof SequentialBlock))
return false;
binOp = ((InstructionBlock) sb.subBlocks[0])
.getInstruction();
sb = (SequentialBlock) sb.outer;
}
if (!(binOp instanceof BinaryOperator))
return false;
int op;
if (binOp.getOperator().getOperatorIndex() == store.ADD_OP)
op = Operator.INC_OP;
else if (binOp.getOperator().getOperatorIndex() == store.NEG_OP)
op = Operator.DEC_OP;
else
return false;
if (!(sb.subBlocks[0] instanceof InstructionBlock))
return false;
InstructionBlock ib = (InstructionBlock) sb.subBlocks[0];
if (!(ib.getInstruction() instanceof ConstOperator))
return false;
ConstOperator constOp = (ConstOperator) ib.getInstruction();
if (constOp.getValue().equals("-1"))
op ^= 1;
else if (!constOp.getValue().equals("1"))
return false;
sequBlock = (SequentialBlock) sequBlock.outer;
ib = (InstructionBlock) sequBlock.subBlocks[0];
Operator load = (Operator) ib.getInstruction();
if (!store.matches(load))
return false;
if (!(sb.outer instanceof SequentialBlock))
return false;
sb = (SequentialBlock) sb.outer;
if (!(sb.subBlocks[0] instanceof SpecialBlock))
return false;
SpecialBlock dup = (SpecialBlock) sb.subBlocks[0];
if (dup.type != SpecialBlock.DUP
|| dup.count != store.getLValueType().stackSize()
|| dup.depth != store.getLValueOperandCount())
return false;
if (store.getLValueOperandCount() > 0) {
sequBlock = (SequentialBlock) sequBlock.outer;
SpecialBlock dup2 = (SpecialBlock) sequBlock.subBlocks[0];
if (dup2.type != SpecialBlock.DUP
|| dup2.count != store.getLValueOperandCount()
|| dup2.depth != 0)
return false;
}
type = load.getType().intersection(store.getLValueType());
} catch (NullPointerException ex) {
if (!(sb.outer instanceof SequentialBlock))
return false;
} catch (ClassCastException ex) {
sb = (SequentialBlock) sb.outer;
if (!(sb.subBlocks[0] instanceof InstructionBlock))
return false;
ib = (InstructionBlock) sb.subBlocks[0];
if (!(ib.getInstruction() instanceof Operator)
|| !store.matches((Operator) ib.getInstruction()))
return false;
if (store.getLValueOperandCount() > 0) {
if (!(sb.outer instanceof SequentialBlock))
return false;
sb = (SequentialBlock) sb.outer;
if (!(sb.subBlocks[0] instanceof SpecialBlock))
return false;
SpecialBlock dup2 = (SpecialBlock) sb.subBlocks[0];
if (dup2.type != SpecialBlock.DUP
|| dup2.count != store.getLValueOperandCount()
|| dup2.depth != 0)
return false;
}
Operator postop = new PrePostFixOperator(type, op, store, true);
lastBlock.setInstruction(postop);
lastBlock.moveDefinitions(sequBlock, lastBlock);
lastBlock.replace(sequBlock);
ic.setInstruction
(new PrePostFixOperator(store.getLValueType(), op, store, true));
ic.moveDefinitions(sb, last);
last.replace(sb);
return true;
}
}

268
jode/jode/flow/FlowBlock.java
Unescape View File

@ -199,73 +199,69 @@ public class FlowBlock {
ConditionalBlock cb = (ConditionalBlock) jump.prev.outer;
Expression instr = cb.getInstruction();
/* If this is the first instruction of a while and the
* condition of the while is true, use the condition
* as while condition.
*/
if (cb.outer instanceof LoopBlock
|| (cb.outer instanceof SequentialBlock
&& cb.outer.getSubBlocks()[0] == cb
&& cb.outer.outer instanceof LoopBlock)) {
LoopBlock loopBlock = (cb.outer instanceof LoopBlock) ?
(LoopBlock) cb.outer : (LoopBlock) cb.outer.outer;
if (loopBlock.getCondition() == LoopBlock.TRUE &&
loopBlock.getType() != LoopBlock.DOWHILE &&
(loopBlock.jumpMayBeChanged()
|| loopBlock.getNextFlowBlock() == succ)) {
if (loopBlock.jump == null) {
/* consider this jump again */
loopBlock.moveJump(jump);
jumps = jump;
} else
jump.prev.removeJump();
loopBlock.setCondition(instr.negate());
loopBlock.moveDefinitions(cb, null);
cb.removeBlock();
continue;
}
} else if (cb.outer instanceof SequentialBlock
&& cb.outer.getSubBlocks()[1] == cb) {
// if (cb.outer instanceof LoopBlock
// || (cb.outer instanceof SequentialBlock
// && cb.outer.getSubBlocks()[0] == cb
// && cb.outer.outer instanceof LoopBlock)) {
// LoopBlock loopBlock = (cb.outer instanceof LoopBlock) ?
// (LoopBlock) cb.outer : (LoopBlock) cb.outer.outer;
/* And now for do/while loops, where the jump is
* at the end of the loop.
*/
// if (loopBlock.getCondition() == LoopBlock.TRUE &&
// loopBlock.getType() != LoopBlock.DOWHILE &&
// (loopBlock.jumpMayBeChanged()
// || loopBlock.getNextFlowBlock() == succ)) {
// if (loopBlock.jump == null) {
// /* consider this jump again */
// loopBlock.moveJump(jump);
// jumps = jump;
// } else
// jump.prev.removeJump();
// loopBlock.setCondition(instr.negate());
// loopBlock.moveDefinitions(cb, null);
// cb.removeBlock();
// continue;
// }
// } else if (cb.outer instanceof SequentialBlock
// && cb.outer.getSubBlocks()[1] == cb) {
// /* And now for do/while loops, where the jump is
// * at the end of the loop.
// */
/* First find the beginning of the loop */
StructuredBlock sb = cb.outer.outer;
while (sb instanceof SequentialBlock) {
sb = sb.outer;
}
/* sb is now the first and cb is the last
* instruction in the current block.
*/
if (sb instanceof LoopBlock) {
LoopBlock loopBlock = (LoopBlock) sb;
if (loopBlock.getCondition() == LoopBlock.TRUE &&
loopBlock.getType() == LoopBlock.WHILE &&
(loopBlock.jumpMayBeChanged()
|| loopBlock.getNextFlowBlock() == succ)) {
// /* First find the beginning of the loop */
// StructuredBlock sb = cb.outer.outer;
// while (sb instanceof SequentialBlock) {
// sb = sb.outer;
// }
// /* sb is now the first and cb is the last
// * instruction in the current block.
// */
// if (sb instanceof LoopBlock) {
// LoopBlock loopBlock = (LoopBlock) sb;
// if (loopBlock.getCondition() == LoopBlock.TRUE &&
// loopBlock.getType() == LoopBlock.WHILE &&
// (loopBlock.jumpMayBeChanged()
// || loopBlock.getNextFlowBlock() == succ)) {
if (loopBlock.jump == null) {
/* consider this jump again */
loopBlock.moveJump(jump);
jumps = jump;
} else
jump.prev.removeJump();
loopBlock.setType(LoopBlock.DOWHILE);
loopBlock.setCondition(instr.negate());
loopBlock.moveDefinitions(cb, null);
cb.removeBlock();
continue;
}
}
}
// if (loopBlock.jump == null) {
// /* consider this jump again */
// loopBlock.moveJump(jump);
// jumps = jump;
// } else
// jump.prev.removeJump();
// loopBlock.setType(LoopBlock.DOWHILE);
// loopBlock.setCondition(instr.negate());
// loopBlock.moveDefinitions(cb, null);
// cb.removeBlock();
// continue;
// }
// }
// }
/* replace all conditional jumps to the successor, which
* are followed by a block which has the end of the block
@ -599,6 +595,30 @@ public class FlowBlock {
}
}
/**
* This is a special T1 transformation, that does also succeed, if
* the jumps in the flow block are not yet resolved. But it has
* a special precondition: The succ must be a simple instruction block,
* mustn't have another predecessor and all structured blocks in this
* flow block must be simple instruction blocks.
*/
public void doSequentialT1(StructuredBlock succ, int length) {
VariableSet succIn = new VariableSet();
succ.fillInGenSet(succIn, this.gen);
succIn.merge(lastModified.jump.gen);
succIn.subtract(lastModified.jump.kill);
succ.jump.gen.mergeGenKill(lastModified.jump.gen, succ.jump.kill);
succ.jump.kill.add(lastModified.jump.kill);
this.in.unionExact(succIn);
lastModified.removeJump();
lastModified = lastModified.appendBlock(succ);
this.length += length;
doTransformations();
}
/**
* Do a T1 transformation with succ if possible. It is possible,
* iff succ has exactly this block as predecessor.
@ -619,19 +639,25 @@ public class FlowBlock {
/* Update the in/out-Vectors now */
updateInOut(succ, jumps);
if (Decompiler.isFlowDebugging)
System.err.println("before Optimize: "+this);
/* Try to eliminate as many jumps as possible.
*/
jumps = optimizeJumps(jumps, succ);
if (Decompiler.isFlowDebugging)
System.err.println("before Remaining: "+this);
resolveRemaining(jumps);
if (Decompiler.isFlowDebugging)
System.err.println("after Optimize: "+this);
/* Now unify the blocks.
*/
lastModified.appendBlock(succ.block);
lastModified = lastModified.appendBlock(succ.block);
mergeSuccessors(succ);
/* Set last modified to the new correct value. */
lastModified = succ.lastModified;
/* This will also set last modified to the new correct value. */
doTransformations();
/* Set addr+length to correct value. */
if (succ.addr < addr)
@ -643,6 +669,44 @@ public class FlowBlock {
return true;
}
/**
* Find the exit condition of a for/while block. The loop block
* mustn't have an exit condition yet.
*/
public void mergeCondition() {
/* If the first instruction of a while is a conditional
* block, which jumps to the next address use the condition
* as while condition.
*/
LoopBlock loopBlock = (LoopBlock) lastModified;
int loopType = loopBlock.getType();
ConditionalBlock cb = null;
if (loopBlock.bodyBlock instanceof ConditionalBlock)
cb = (ConditionalBlock) loopBlock.bodyBlock;
else if (loopBlock.bodyBlock instanceof SequentialBlock
&& loopBlock.bodyBlock.getSubBlocks()[0]
instanceof ConditionalBlock)
cb = (ConditionalBlock) loopBlock.bodyBlock.getSubBlocks()[0];
else if (loopBlock.bodyBlock instanceof SequentialBlock
&& loopType == LoopBlock.WHILE) {
loopType = LoopBlock.DOWHILE;
SequentialBlock sequBlock = (SequentialBlock) loopBlock.bodyBlock;
while (sequBlock.subBlocks[1] instanceof SequentialBlock)
sequBlock = (SequentialBlock) sequBlock.subBlocks[1];
if (sequBlock.subBlocks[1] instanceof ConditionalBlock)
cb = (ConditionalBlock) sequBlock.subBlocks[1];
}
if (cb != null
&& cb.trueBlock.jump.destination.addr == addr + length) {
loopBlock.moveJump(cb.trueBlock.jump);
loopBlock.setCondition(cb.getInstruction().negate());
loopBlock.setType(loopType);
loopBlock.moveDefinitions(cb, null);
cb.removeBlock();
}
}
public boolean doT2(int start, int end) {
/* If there are no jumps to the beginning of this flow block
@ -800,6 +864,7 @@ public class FlowBlock {
*/
predecessors.removeElement(this);
lastModified = block;
mergeCondition();
/* T2 analysis succeeded */
checkConsistent();
@ -881,20 +946,20 @@ public class FlowBlock {
checkConsistent();
}
public void doTransformations() {
if (Decompiler.isFlowDebugging)
System.err.println("before Transformation: "+this);
static Transformation[] exprTrafos = {
new RemoveEmpty(),
new CreateExpression(),
new CreatePrePostIncExpression(),
new CreateAssignExpression(),
new CreateNewConstructor(),
new CombineIfGotoExpressions(),
new CreateIfThenElseOperator(),
new CreateConstantArray(),
new CreateForInitializer(),
new CompleteSynchronized(),
};
while (lastModified instanceof SequentialBlock) {
if (!lastModified.getSubBlocks()[0].doTransformations())
lastModified = lastModified.getSubBlocks()[1];
}
while (lastModified.doTransformations())
/* empty */;
if (Decompiler.isFlowDebugging)
System.err.println("after Transformation: "+this);
}
/**
* Search for an apropriate successor.
@ -944,21 +1009,12 @@ public class FlowBlock {
while (true) {
if (Decompiler.isFlowDebugging)
System.err.println("before Transformation: "+this);
/* First do some non flow transformations. */
int i=0;
while (i < exprTrafos.length) {
if (exprTrafos[i].transform(this))
i = 0;
else
i++;
checkConsistent();
}
if (Decompiler.isFlowDebugging)
System.err.println("after Transformation: "+this);
if (lastModified instanceof SwitchBlock) {
/* analyze the switch first.
*/
analyzeSwitch(start, end);
}
if (doT2(start, end)) {
@ -989,20 +1045,6 @@ public class FlowBlock {
+ addr + " - " + (addr+length));
return changed;
} else {
if (succ.block instanceof SwitchBlock) {
/* analyze succ, the new region is the
* continuous region of
* [start,end) \cap \compl [addr, addr+length)
* where succ.addr lies in.
*/
int newStart = (succ.addr > addr)
? addr+length : start;
int newEnd = (succ.addr > addr)
? end : addr;
if (succ.analyzeSwitch(newStart, newEnd))
break;
}
if ((succ.addr == addr+length
|| succ.addr+succ.length == addr)
/* Only do T1 transformation if the blocks are
@ -1058,14 +1100,14 @@ public class FlowBlock {
* regions. Only blocks whose address lies in the given address
* range are considered and it is taken care of, that the switch
* is never leaved. <p>
* The current flow block must contain the switch block as main
* block.
* The current flow block must contain the switch block as lastModified
* @param start the start of the address range.
* @param end the end of the address range.
*/
public boolean analyzeSwitch(int start, int end) {
SwitchBlock switchBlock = (SwitchBlock) block;
SwitchBlock switchBlock = (SwitchBlock) lastModified;
boolean changed = false;
int last = -1;
FlowBlock lastFlow = null;
for (int i=0; i < switchBlock.caseBlocks.length; i++) {
@ -1165,8 +1207,10 @@ public class FlowBlock {
jump.destination = END_OF_METHOD;
else
jump.destination = instr[jump.destAddr];
if (jump.destination == null)
throw new AssertError("Missing dest: "+jump.destAddr);
addSuccessor(jump);
}
addSuccessor(jump);
}
}

10
jode/jode/flow/InstructionContainer.java
Unescape View File

@ -56,6 +56,16 @@ public abstract class InstructionContainer extends StructuredBlock {
}
}
public boolean doTransformations() {
StructuredBlock last = flowBlock.lastModified;
return CreateNewConstructor.transform(this, last)
|| CreateExpression.transform(this, last)
|| CreatePrePostIncExpression.transform(this, last)
|| CreateAssignExpression.transform(this, last)
|| CreateIfThenElseOperator.create(this, last)
|| CreateConstantArray.transform(this, last);
}
/**
* Get the contained instruction.
* @return the contained instruction.

8
jode/jode/flow/LoopBlock.java
Unescape View File

@ -51,7 +51,7 @@ public class LoopBlock extends StructuredBlock implements BreakableBlock {
* The increase instruction, only valid if type == FOR.
*/
Expression incr;
/**
* True, if the initializer is a declaration.
*/
@ -253,4 +253,10 @@ public class LoopBlock extends StructuredBlock implements BreakableBlock {
public boolean jumpMayBeChanged() {
return mayChangeJump;
}
public boolean doTransformations() {
return type == FOR && init == null
&& CreateForInitializer.transform(this, flowBlock.lastModified);
}
}

69
jode/jode/flow/RemoveEmpty.java
Unescape View File

@ -21,41 +21,10 @@ package jode.flow;
import jode.Expression;
import jode.NopOperator;
public class RemoveEmpty implements Transformation {
public class RemoveEmpty {
public boolean transform (FlowBlock fb) {
return (removeNop(fb) || removeSwap(fb) || removeEmpty(fb));
}
public boolean removeNop(FlowBlock flow) {
StructuredBlock block = flow.lastModified;
if (block instanceof InstructionContainer
&& block.outer instanceof SequentialBlock
&& block.outer.getSubBlocks()[0] instanceof InstructionBlock) {
InstructionContainer ic = (InstructionContainer) block;
Expression nopInstr = ic.getInstruction();
if (!(nopInstr instanceof NopOperator)
|| nopInstr.getType() == jode.Type.tVoid)
return false;
InstructionBlock prev =
(InstructionBlock) ic.outer.getSubBlocks()[0];
Expression instr = prev.getInstruction();
if (instr.getType() == jode.Type.tVoid)
return false;
instr.setType(nopInstr.getType());
ic.setInstruction(instr);
ic.replace(ic.outer);
return true;
}
return false;
}
public boolean removeSwap(FlowBlock flow) {
public static boolean removeSwap(SpecialBlock swapBlock,
StructuredBlock last) {
/* Remove non needed swaps; convert:
*
* PUSH expr1
@ -67,37 +36,43 @@ public class RemoveEmpty implements Transformation {
* PUSH expr2
* PUSH expr1
*/
StructuredBlock block = flow.lastModified;
if (block instanceof SpecialBlock
&& ((SpecialBlock)block).type == SpecialBlock.SWAP
&& block.outer instanceof SequentialBlock
&& block.outer.outer instanceof SequentialBlock
&& block.outer.getSubBlocks()[0] instanceof InstructionBlock
&& block.outer.outer.getSubBlocks()[0]
if (last.outer instanceof SequentialBlock
&& last.outer.outer instanceof SequentialBlock
&& last.outer.getSubBlocks()[0] instanceof InstructionBlock
&& last.outer.outer.getSubBlocks()[0]
instanceof InstructionBlock) {
InstructionBlock block1
= (InstructionBlock) block.outer.outer.getSubBlocks()[0];
= (InstructionBlock) last.outer.outer.getSubBlocks()[0];
InstructionBlock block2
= (InstructionBlock) block.outer.getSubBlocks()[0];
= (InstructionBlock) last.outer.getSubBlocks()[0];
/* XXX check if blocks may be swapped
* (there mustn't be side effects in one of them).
*/
System.err.println("WARNING: this program contains a SWAP "
+"opcode and may not be translated correctly.");
if (block1.getInstruction().isVoid()
|| block2.getInstruction().isVoid())
return false;
/* PUSH expr1 == block1
* PUSH expr2
* SWAP
* ...
*/
block.outer.replace(block1.outer);
last.outer.replace(block1.outer);
/* PUSH expr2
* SWAP
* ...
*/
block1.replace(block);
block1.moveJump(block.jump);
block1.replace(swapBlock);
block1.moveJump(swapBlock.jump);
/* PUSH expr2
* PUSH expr1
*/
flow.lastModified = block1;
block1.flowBlock.lastModified = block1.outer;
return true;
}
return false;

5
jode/jode/flow/SpecialBlock.java
Unescape View File

@ -56,4 +56,9 @@ public class SpecialBlock extends StructuredBlock {
+ ((count == 1) ? "" : "2")
+ ((depth == 0) ? "" : "_X"+depth));
}
public boolean doTransformation() {
return type == SWAP
&& RemoveEmpty.removeSwap(this, flowBlock.lastModified);
}
}

52
jode/jode/flow/StructuredBlock.java
Unescape View File

@ -191,7 +191,7 @@ public abstract class StructuredBlock {
/**
* Removes the jump. This does not update the successors vector
* of the flow block, you have to do it yourself. */
public void removeJump() {
public final void removeJump() {
if (jump != null) {
jump.prev = null;
jump = null;
@ -208,21 +208,15 @@ public abstract class StructuredBlock {
* will be moved to this block (may be this).
*/
void moveDefinitions(StructuredBlock from, StructuredBlock sub) {
if (from != sub && from != this) {
/* define(...) will not move from blocks, that are not sub blocks,
* so we do it by hand.
*/
java.util.Enumeration enum = from.used.elements();
while (enum.hasMoreElements()) {
LocalInfo var =
((LocalInfo) enum.nextElement()).getLocalInfo();
if (!used.contains(var))
used.addElement(var);
}
while (from != sub && from != this) {
used.unionExact(from.used);
from.used.removeAllElements();
StructuredBlock[] subs = from.getSubBlocks();
for (int i=0; i<subs.length; i++)
if (subs.length == 0)
return;
for (int i=0; i<subs.length - 1; i++)
moveDefinitions(subs[i], sub);
from = subs[subs.length-1];
}
}
@ -282,11 +276,16 @@ public abstract class StructuredBlock {
* @return the new combined block.
*/
public StructuredBlock appendBlock(StructuredBlock block) {
SequentialBlock sequBlock = new SequentialBlock();
sequBlock.replace(this);
sequBlock.setFirst(this);
sequBlock.setSecond(block);
return sequBlock;
if (block instanceof EmptyBlock) {
moveJump(block.jump);
return this;
} else {
SequentialBlock sequBlock = new SequentialBlock();
sequBlock.replace(this);
sequBlock.setFirst(this);
sequBlock.setSecond(block);
return sequBlock;
}
}
/**
@ -318,14 +317,6 @@ public abstract class StructuredBlock {
return false;
}
public void define(VariableSet vars) {
java.util.Enumeration enum = vars.elements();
while (enum.hasMoreElements()) {
LocalInfo var = ((LocalInfo) enum.nextElement()).getLocalInfo();
used.addElement(var);
}
}
public VariableSet propagateUsage() {
StructuredBlock[] subs = getSubBlocks();
VariableSet allUse = (VariableSet) used.clone();
@ -371,7 +362,7 @@ public abstract class StructuredBlock {
}
subs[i].checkConsistent();
}
if (jump != null) {
if (jump != null && jump.destination != null) {
Jump jumps = (Jump) flowBlock.successors.get(jump.destination);
for (; jumps != jump; jumps = jumps.next) {
if (jumps == null)
@ -484,5 +475,12 @@ public abstract class StructuredBlock {
return super.toString();
}
}
/**
* Do simple transformation on the structuredBlock.
*/
public boolean doTransformations() {
return false;
}
}

4
jode/jode/flow/SynchronizedBlock.java
Unescape View File

@ -91,4 +91,8 @@ public class SynchronizedBlock extends StructuredBlock {
writer.untab();
writer.println("}");
}
public boolean doTransformations() {
return CompleteSynchronized.transform(this, flowBlock.lastModified);
}
}

2
jode/jode/type/ClassInterfacesType.java
Unescape View File

@ -192,7 +192,7 @@ public class ClassInterfacesType extends Type {
return tError;
ClassInterfacesType other = (ClassInterfacesType) type;
Class clazz = null;
Class clazz;
Vector ifaces = new Vector();
/* First determine the clazz, one of the two classes must be a sub

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