private List<Instruction> transformSetterInvocation(InvokeInstruction insn, String property) {
ValueType type = insn.getMethod().getDescriptor().parameterType(0);
List<Instruction> instructions = new ArrayList<>();
if (type instanceof ValueType.Primitive) {
switch (((ValueType.Primitive) type).getKind()) {
case BOOLEAN:
castAndSetProperty(insn, property, instructions, boolean.class);
return instructions;
case BYTE:
castAndSetProperty(insn, property, instructions, byte.class);
return instructions;
case SHORT:
castAndSetProperty(insn, property, instructions, short.class);
return instructions;
case INTEGER:
castAndSetProperty(insn, property, instructions, int.class);
return instructions;
case FLOAT:
castAndSetProperty(insn, property, instructions, float.class);
return instructions;
case DOUBLE:
castAndSetProperty(insn, property, instructions, double.class);
return instructions;
case CHARACTER:
case LONG:
break;
}
} else if (type instanceof ValueType.Object) {
switch (((ValueType.Object) type).getClassName()) {
case "java.lang.String":
{
Variable castVar = insn.getProgram().createVariable();
InvokeInstruction castInvoke = new InvokeInstruction();
castInvoke.setType(InvocationType.SPECIAL);
castInvoke.setMethod(
new MethodReference(
ResourceAccessor.class, "castFromString", String.class, Object.class));
castInvoke.getArguments().add(insn.getArguments().get(0));
castInvoke.setReceiver(castVar);
instructions.add(castInvoke);
setProperty(insn, property, instructions, castVar);
return instructions;
}
default:
{
setProperty(insn, property, instructions, insn.getArguments().get(0));
return instructions;
}
}
}
return null;
}
@Override
public void visit(MonitorExitInstruction insn) {
MonitorExitStatement stmt = new MonitorExitStatement();
stmt.setLocation(currentLocation);
stmt.setObjectRef(Expr.var(insn.getObjectRef().getIndex()));
statements.add(stmt);
}
@Override
public void visit(RaiseInstruction insn) {
ThrowStatement stmt = new ThrowStatement();
stmt.setLocation(currentLocation);
stmt.setException(Expr.var(insn.getException().getIndex()));
statements.add(stmt);
}
@Override
public void visit(JumpInstruction insn) {
Statement stmt = generateJumpStatement(insn.getTarget());
if (stmt != null) {
statements.add(stmt);
}
}
@Override
public void visit(InvokeInstruction insn) {
Expr[] exprArgs = new Expr[insn.getMethod().getParameterTypes().length];
for (int i = 0; i < insn.getArguments().size(); ++i) {
exprArgs[i] = Expr.var(insn.getArguments().get(i).getIndex());
}
InvocationExpr invocationExpr;
if (insn.getInstance() != null) {
if (insn.getType() == InvocationType.VIRTUAL) {
invocationExpr =
Expr.invoke(insn.getMethod(), Expr.var(insn.getInstance().getIndex()), exprArgs);
} else {
invocationExpr =
Expr.invokeSpecial(insn.getMethod(), Expr.var(insn.getInstance().getIndex()), exprArgs);
}
} else {
invocationExpr = Expr.invokeStatic(insn.getMethod(), exprArgs);
}
AssignmentStatement stmt;
if (insn.getReceiver() != null) {
stmt = Statement.assign(Expr.var(insn.getReceiver().getIndex()), invocationExpr);
stmt.getDebugNames().addAll(insn.getReceiver().getDebugNames());
} else {
stmt = Statement.assign(null, invocationExpr);
}
stmt.setLocation(currentLocation);
stmt.setAsync(async);
async = false;
statements.add(stmt);
}
@Override
public void visit(GetFieldInstruction insn) {
if (insn.getInstance() != null) {
AssignmentStatement stmt =
Statement.assign(
Expr.var(insn.getReceiver().getIndex()),
Expr.qualify(Expr.var(insn.getInstance().getIndex()), insn.getField()));
stmt.setLocation(currentLocation);
statements.add(stmt);
} else {
Expr fieldExpr = Expr.qualify(null, insn.getField());
AssignmentStatement stmt =
Statement.assign(Expr.var(insn.getReceiver().getIndex()), fieldExpr);
stmt.setLocation(currentLocation);
statements.add(stmt);
}
}
@Override
public void visit(ExitInstruction insn) {
ReturnStatement stmt =
Statement.exitFunction(
insn.getValueToReturn() != null ? Expr.var(insn.getValueToReturn().getIndex()) : null);
stmt.setLocation(currentLocation);
statements.add(stmt);
}
private void setProperty(
InvokeInstruction insn, String property, List<Instruction> instructions, Variable valueVar) {
Variable nameVar = program.createVariable();
StringConstantInstruction nameInsn = new StringConstantInstruction();
nameInsn.setConstant(property);
nameInsn.setReceiver(nameVar);
instructions.add(nameInsn);
InvokeInstruction accessorInvoke = new InvokeInstruction();
accessorInvoke.setType(InvocationType.SPECIAL);
accessorInvoke.setMethod(
new MethodReference(
ResourceAccessor.class, "put", Object.class, String.class, Object.class, void.class));
accessorInvoke.getArguments().add(insn.getInstance());
accessorInvoke.getArguments().add(nameVar);
accessorInvoke.getArguments().add(valueVar);
instructions.add(accessorInvoke);
}
@Override
public void visit(AssignInstruction insn) {
AssignmentStatement stmt =
Statement.assign(
Expr.var(insn.getReceiver().getIndex()), Expr.var(insn.getAssignee().getIndex()));
stmt.getDebugNames().addAll(insn.getReceiver().getDebugNames());
stmt.setLocation(currentLocation);
statements.add(stmt);
}
private void branch(Expr condition, BasicBlock consequentBlock, BasicBlock alternativeBlock) {
Statement consequent = generateJumpStatement(consequentBlock);
Statement alternative = generateJumpStatement(alternativeBlock);
statements.add(
Statement.cond(
condition,
consequent != null ? Arrays.asList(consequent) : Collections.emptyList(),
alternative != null ? Arrays.asList(alternative) : Collections.emptyList()));
}
@Override
public void visit(PutElementInstruction insn) {
AssignmentStatement stmt =
Statement.assign(
Expr.subscript(
Expr.var(insn.getArray().getIndex()), Expr.var(insn.getIndex().getIndex())),
Expr.var(insn.getValue().getIndex()));
stmt.setLocation(currentLocation);
statements.add(stmt);
}
@Override
public void visit(PutFieldInstruction insn) {
Expr right = Expr.var(insn.getValue().getIndex());
Expr left;
if (insn.getInstance() != null) {
left = Expr.qualify(Expr.var(insn.getInstance().getIndex()), insn.getField());
} else {
left = Expr.qualify(null, insn.getField());
}
AssignmentStatement stmt = Statement.assign(left, right);
stmt.setLocation(currentLocation);
statements.add(stmt);
}
private void castAndSetProperty(
InvokeInstruction insn, String property, List<Instruction> instructions, Class<?> primitive) {
Variable castVar = program.createVariable();
InvokeInstruction castInvoke = new InvokeInstruction();
castInvoke.setType(InvocationType.SPECIAL);
String primitiveCapitalized = primitive.getName();
primitiveCapitalized =
Character.toUpperCase(primitiveCapitalized.charAt(0)) + primitiveCapitalized.substring(1);
castInvoke.setMethod(
new MethodReference(
ResourceAccessor.class, "castFrom" + primitiveCapitalized, primitive, Object.class));
castInvoke.getArguments().add(insn.getArguments().get(0));
castInvoke.setReceiver(castVar);
instructions.add(castInvoke);
setProperty(insn, property, instructions, castVar);
}
private void transformBasicBlock(BasicBlock block) {
List<Instruction> instructions = block.getInstructions();
for (int i = 0; i < instructions.size(); ++i) {
Instruction insn = instructions.get(i);
if (insn instanceof InvokeInstruction) {
InvokeInstruction invoke = (InvokeInstruction) insn;
List<Instruction> replacement = transformInvoke(invoke);
if (replacement != null) {
instructions.set(i, new EmptyInstruction());
instructions.addAll(i, replacement);
i += replacement.size();
}
}
}
}
@Override
public void visit(SwitchInstruction insn) {
SwitchStatement stmt = new SwitchStatement();
stmt.setId("sblock" + (lastSwitchId++));
stmt.setValue(Expr.var(insn.getCondition().getIndex()));
Map<Integer, List<Integer>> switchMap = new HashMap<>();
for (int i = 0; i < insn.getEntries().size(); ++i) {
SwitchTableEntry entry = insn.getEntries().get(i);
List<Integer> conditions = switchMap.get(entry.getTarget().getIndex());
if (conditions == null) {
conditions = new ArrayList<>();
switchMap.put(entry.getTarget().getIndex(), conditions);
}
conditions.add(entry.getCondition());
}
List<Integer> targets = new ArrayList<>(switchMap.keySet());
Collections.sort(targets);
for (int target : targets) {
SwitchClause clause = new SwitchClause();
List<Integer> conditionList = switchMap.get(target);
int[] conditions = new int[conditionList.size()];
for (int i = 0; i < conditionList.size(); ++i) {
conditions[i] = conditionList.get(i);
}
clause.setConditions(conditions);
Statement jumpStmt = generateJumpStatement(stmt, target);
if (jumpStmt != null) {
clause.getBody().add(jumpStmt);
}
stmt.getClauses().add(clause);
}
Statement breakStmt = generateJumpStatement(insn.getDefaultTarget());
if (breakStmt != null) {
stmt.getDefaultClause().add(breakStmt);
}
statements.add(stmt);
}
@Override
public void visit(InitClassInstruction insn) {
InitClassStatement stmt = Statement.initClass(insn.getClassName());
stmt.setLocation(currentLocation);
statements.add(stmt);
}
private void assign(Expr source, Variable target) {
AssignmentStatement stmt = Statement.assign(Expr.var(target.getIndex()), source);
stmt.setLocation(currentLocation);
stmt.getDebugNames().addAll(target.getDebugNames());
statements.add(stmt);
}