@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(BranchingInstruction insn) {
switch (insn.getCondition()) {
case EQUAL:
branch(
compare(BinaryOperation.EQUALS, insn.getOperand()),
insn.getConsequent(),
insn.getAlternative());
break;
case NOT_EQUAL:
branch(
compare(BinaryOperation.NOT_EQUALS, insn.getOperand()),
insn.getConsequent(),
insn.getAlternative());
break;
case GREATER:
branch(
compare(BinaryOperation.GREATER, insn.getOperand()),
insn.getConsequent(),
insn.getAlternative());
break;
case GREATER_OR_EQUAL:
branch(
compare(BinaryOperation.GREATER_OR_EQUALS, insn.getOperand()),
insn.getConsequent(),
insn.getAlternative());
break;
case LESS:
branch(
compare(BinaryOperation.LESS, insn.getOperand()),
insn.getConsequent(),
insn.getAlternative());
break;
case LESS_OR_EQUAL:
branch(
compare(BinaryOperation.LESS_OR_EQUALS, insn.getOperand()),
insn.getConsequent(),
insn.getAlternative());
break;
case NOT_NULL:
branch(
Expr.binary(
BinaryOperation.STRICT_NOT_EQUALS,
Expr.var(insn.getOperand().getIndex()),
Expr.constant(null)),
insn.getConsequent(),
insn.getAlternative());
break;
case NULL:
branch(
Expr.binary(
BinaryOperation.STRICT_EQUALS,
Expr.var(insn.getOperand().getIndex()),
Expr.constant(null)),
insn.getConsequent(),
insn.getAlternative());
break;
}
}
@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);
}
@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);
}
@Override
public void visit(BinaryBranchingInstruction insn) {
int a = insn.getFirstOperand().getIndex();
int b = insn.getSecondOperand().getIndex();
BasicBlock consequent = insn.getConsequent();
BasicBlock alternative = insn.getAlternative();
switch (insn.getCondition()) {
case EQUAL:
branch(
withLocation(Expr.binary(BinaryOperation.EQUALS, Expr.var(a), Expr.var(b))),
consequent,
alternative);
break;
case REFERENCE_EQUAL:
branch(
withLocation(Expr.binary(BinaryOperation.STRICT_EQUALS, Expr.var(a), Expr.var(b))),
consequent,
alternative);
break;
case NOT_EQUAL:
branch(
withLocation(Expr.binary(BinaryOperation.NOT_EQUALS, Expr.var(a), Expr.var(b))),
consequent,
alternative);
break;
case REFERENCE_NOT_EQUAL:
branch(
withLocation(Expr.binary(BinaryOperation.STRICT_NOT_EQUALS, Expr.var(a), Expr.var(b))),
consequent,
alternative);
break;
}
}
@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(ConstructMultiArrayInstruction insn) {
Expr[] dimensionExprs = new Expr[insn.getDimensions().size()];
for (int i = 0; i < dimensionExprs.length; ++i) {
dimensionExprs[i] = Expr.var(insn.getDimensions().get(i).getIndex());
}
assign(Expr.createArray(insn.getItemType(), dimensionExprs), insn.getReceiver());
}
@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);
}
@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(CloneArrayInstruction insn) {
MethodDescriptor cloneMethodDesc =
new MethodDescriptor("clone", ValueType.object("java.lang.Object"));
MethodReference cloneMethod = new MethodReference("java.lang.Object", cloneMethodDesc);
assign(
Expr.invoke(cloneMethod, Expr.var(insn.getArray().getIndex()), new Expr[0]),
insn.getReceiver());
}
@Override
public void visit(NegateInstruction insn) {
switch (insn.getOperandType()) {
case INT:
assign(
castToInteger(
Expr.unary(UnaryOperation.NEGATE, Expr.var(insn.getOperand().getIndex()))),
insn.getReceiver());
break;
case LONG:
assign(
Expr.unary(UnaryOperation.NEGATE_LONG, Expr.var(insn.getOperand().getIndex())),
insn.getReceiver());
break;
default:
assign(
Expr.unary(UnaryOperation.NEGATE, Expr.var(insn.getOperand().getIndex())),
insn.getReceiver());
break;
}
}
@Override
public void visit(CastNumberInstruction insn) {
Expr value = Expr.var(insn.getValue().getIndex());
switch (insn.getTargetType()) {
case INT:
switch (insn.getSourceType()) {
case DOUBLE:
case FLOAT:
value = castToInteger(value);
break;
case LONG:
value = castLongToInt(value);
break;
default:
break;
}
break;
case LONG:
switch (insn.getSourceType()) {
case INT:
value = castIntToLong(value);
break;
case FLOAT:
case DOUBLE:
value = castToLong(value);
break;
default:
break;
}
break;
case FLOAT:
case DOUBLE:
if (insn.getSourceType() == NumericOperandType.LONG) {
value = castFromLong(value);
}
break;
default:
break;
}
assign(value, insn.getReceiver());
}
@Override
public void visit(CastIntegerInstruction insn) {
Expr value = Expr.var(insn.getValue().getIndex());
switch (insn.getDirection()) {
case FROM_INTEGER:
switch (insn.getTargetType()) {
case BYTE:
value = Expr.unary(UnaryOperation.INT_TO_BYTE, value);
break;
case SHORT:
value = Expr.unary(UnaryOperation.INT_TO_SHORT, value);
break;
case CHARACTER:
value = Expr.unary(UnaryOperation.INT_TO_CHAR, value);
break;
}
break;
case TO_INTEGER:
break;
}
assign(value, insn.getReceiver());
}
@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(NullCheckInstruction insn) {
assign(
Expr.unary(UnaryOperation.NULL_CHECK, Expr.var(insn.getValue().getIndex())),
insn.getReceiver());
}
private Expr compare(BinaryOperation op, Variable value) {
Expr expr = Expr.binary(op, Expr.var(value.getIndex()), Expr.constant(0));
expr.setLocation(currentLocation);
return expr;
}
private void intBinary(int first, int second, Variable result, BinaryOperation op) {
assign(castToInteger(Expr.binary(op, Expr.var(first), Expr.var(second))), result);
}
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);
}
@Override
public void visit(IsInstanceInstruction insn) {
assign(
Expr.instanceOf(Expr.var(insn.getValue().getIndex()), insn.getType()), insn.getReceiver());
}
@Override
public void visit(CastInstruction insn) {
assign(Expr.var(insn.getValue().getIndex()), insn.getReceiver());
}
@Override
public void visit(GetElementInstruction insn) {
assign(
Expr.subscript(Expr.var(insn.getArray().getIndex()), Expr.var(insn.getIndex().getIndex())),
insn.getReceiver());
}
@Override
public void visit(ConstructArrayInstruction insn) {
assign(
Expr.createArray(insn.getItemType(), Expr.var(insn.getSize().getIndex())),
insn.getReceiver());
}
@Override
public void visit(UnwrapArrayInstruction insn) {
UnwrapArrayExpr unwrapExpr = new UnwrapArrayExpr(insn.getElementType());
unwrapExpr.setArray(Expr.var(insn.getArray().getIndex()));
assign(unwrapExpr, insn.getReceiver());
}
@Override
public void visit(ArrayLengthInstruction insn) {
assign(
Expr.unary(UnaryOperation.LENGTH, Expr.var(insn.getArray().getIndex())),
insn.getReceiver());
}