/**
* Remove an statement
*
* @param statement
*/
private void remove(CtStatement statement) {
if (statement.getParent() instanceof CtBlock) {
((CtBlock) statement.getParent()).removeStatement(statement);
} else {
CtCodeSnippetStatementImpl comment = new CtCodeSnippetStatementImpl();
comment.setValue("/*REMOVED*/");
statement.replace(comment);
}
}
protected CtMethod apply(CtMethod method, List<Statement> statements, int index) {
CtMethod cloned_method = AmplificationHelper.cloneMethodTest(method, "_cf", 1000);
CtStatement stmt = getAssertStatement(cloned_method).get(index);
statements
.stream()
.forEach(
c -> {
stmt.insertBefore((CtStatement) c.getCtCodeFragment());
c.getCtCodeFragment().setParent(stmt.getParent());
});
return cloned_method;
}
protected List<CtLocalVariable> getLocalVarInScope(CtStatement stmt) {
List<CtLocalVariable> vars = new ArrayList<>();
try {
CtBlock parentBlock = stmt.getParent(CtBlock.class);
if (parentBlock != null) {
boolean beforeCurrentStmt = true;
int i = 0;
List<CtStatement> stmts = parentBlock.getStatements();
while (beforeCurrentStmt && i < stmts.size()) {
CtStatement currentStatement = stmts.get(i);
i++;
beforeCurrentStmt = beforeCurrentStmt && currentStatement != stmt;
if (currentStatement instanceof CtLocalVariable) {
vars.add((CtLocalVariable) currentStatement);
}
}
vars.addAll(getLocalVarInScope(parentBlock));
}
} catch (Exception e) {
throw new RuntimeException(e);
}
return vars;
}
/**
* Resolves all the variables used by the snippet. The ones which are initialized and the ones
* which are not
*
* @return True if the context was extracted successfully
*/
private boolean resolveDataContext(CtStatement statement) {
needsInitialization = false;
// Check some preconditions needed for the processor to run:
// All variable access made inside the statement
List<CtVariableAccess> access = statement.getElements(new TypeFilter<>(CtVariableAccess.class));
if (statement.getElements(new TypeFilter<>(CtThisAccess.class)).size() > 0) {
mustSerializeThiz =
new Preconditions().checkTypeRef(statement.getParent(CtClass.class).getReference());
}
initialized = new HashSet<>();
// Get all THIZ field access from all invocations used in the element
HashSet<CtInvocation> visited = new HashSet<>();
Stack<CtInvocation> invStack = new Stack<>();
invStack.addAll(statement.getElements(new TypeFilter<>(CtInvocation.class)));
while (!invStack.empty()) {
CtInvocation inv = invStack.pop();
if (!visited.contains(inv)) {
visited.add(inv);
CtBlock b;
try {
b = inv.getExecutable().getDeclaration().getBody();
} catch (NullPointerException ex) {
b = null;
}
if (visibility(inv) != PUBLIC && b != null) {
for (CtFieldAccess ta :
b.getElements(new TypeFilter<CtFieldAccess>(CtFieldAccess.class))) {
if (ta.getTarget() instanceof CtThisAccess || ta.getTarget() == null) {
access.add(ta);
// initialized.add(ta);
}
}
for (CtInvocation i : b.getElements(new TypeFilter<CtInvocation>(CtInvocation.class))) {
if (!visited.contains(i)) invStack.push(i);
}
}
}
}
access = cleanRepeatedAccesses(access);
setAccesses(access);
// Find initialized variables of allowed types
ControlFlowBuilder v = new ControlFlowBuilder();
CtMethod m = statement.getParent(CtMethod.class);
if (m == null) return false;
m.accept(v);
ControlFlowGraph g = v.getResult();
g.simplify();
try {
InitializedVariables vars = new InitializedVariables();
vars.run(ControlFlowBuilder.firstNode(g, statement));
for (CtVariableAccess a : access) {
// A variable must be initialized if is local and is not a serializable field
// Also if is not a constant. Constant get declared in the body of the microbenchmark
if (isInitialized(a, statement, vars) && !isAConstant(a)) initialized.add(a);
}
} catch (NotFoundException e) {
return false;
} catch (StackOverflowError e) {
System.out.print(g.toGraphVisText());
throw e;
}
needsInitialization = initialized.size() > 0;
if (access.size() <= 0) return true;
int i = 0;
int replaced = 0;
do {
if (i == 0) replaced = 0;
CtVariableAccess a = access.get(i);
if (canBeReplacedByTarget(a)) {
CtVariableAccess targetOfA = null;
CtTargetedExpression ta = (CtTargetedExpression) a;
if (ta.getTarget() != null) {
if (ta.getTarget() instanceof CtVariableAccess) {
targetOfA = (CtVariableAccess) ta.getTarget();
} else if (ta.getTarget() instanceof CtThisAccess) {
mustSerializeThiz = true;
}
} else {
mustSerializeThiz = true;
}
if (targetOfA != null) {
if (!access.contains(targetOfA)) access.add(targetOfA);
if (initialized.contains(a) && !initialized.contains(targetOfA))
initialized.add(targetOfA);
}
access.remove(a);
if (initialized.contains(a)) initialized.remove(a);
replaced++;
} else i++;
if (i >= access.size()) i = 0;
} while (replaced > 0 || i != 0);
return true;
}
@Override
public void process(CtConditional ctConditional) {
CtStatement parent = ctConditional.getParent(CtStatement.class);
while (!(parent.getParent() instanceof CtStatementList)) {
parent = parent.getParent(CtStatement.class);
}
CtExpression condition = ctConditional.getCondition();
CtIf anIf = getFactory().Core().createIf();
anIf.setPosition(ctConditional.getPosition());
if (parent instanceof CtReturn) {
if (!((CtReturn) parent).getReturnedExpression().equals(ctConditional)) {
return;
}
CtReturn returnThen = (CtReturn) parent.clone();
CtReturn returnElse = (CtReturn) parent.clone();
returnThen.setReturnedExpression(ctConditional.getThenExpression());
returnElse.setReturnedExpression(ctConditional.getElseExpression());
List<CtTypeReference> typeCasts = ctConditional.getTypeCasts();
for (int i = 0; i < typeCasts.size(); i++) {
CtTypeReference ctTypeReference = typeCasts.get(i);
returnThen.getReturnedExpression().addTypeCast(ctTypeReference.clone());
returnElse.getReturnedExpression().addTypeCast(ctTypeReference.clone());
}
anIf.setElseStatement(getFactory().Code().createCtBlock(returnElse));
anIf.setThenStatement(getFactory().Code().createCtBlock(returnThen));
} else if (parent instanceof CtAssignment) {
CtAssignment assignment = (CtAssignment) parent;
CtExpression ctExpression = assignment.getAssignment();
if (!ctExpression.equals(ctConditional)) {
if (ctExpression instanceof CtBinaryOperator) {
CtBinaryOperator ctBinaryOperator = (CtBinaryOperator) ctExpression;
createAssignment(ctConditional, anIf, assignment);
CtBinaryOperator cloneThen = ctBinaryOperator.clone();
CtBinaryOperator cloneElse = ctBinaryOperator.clone();
if (ctBinaryOperator.getLeftHandOperand().equals(ctConditional)) {
cloneThen.setLeftHandOperand(ctConditional.getThenExpression());
ctConditional.getThenExpression().setParent(cloneThen);
cloneElse.setLeftHandOperand(ctConditional.getElseExpression());
} else if (ctBinaryOperator.getRightHandOperand().equals(ctConditional)) {
cloneThen.setRightHandOperand(ctConditional.getThenExpression());
cloneElse.setRightHandOperand(ctConditional.getElseExpression());
}
cloneThen.getLeftHandOperand().setParent(cloneThen);
cloneElse.getLeftHandOperand().setParent(cloneElse);
((CtAssignment) ((CtBlock) anIf.getThenStatement()).getStatement(0))
.setAssignment(cloneThen);
((CtAssignment) ((CtBlock) anIf.getElseStatement()).getStatement(0))
.setAssignment(cloneElse);
} else {
return;
}
} else {
createAssignment(ctConditional, anIf, assignment);
}
} else if (parent instanceof CtLocalVariable) {
CtLocalVariable localVariable = (CtLocalVariable) parent;
if (!localVariable.getDefaultExpression().equals(ctConditional)) {
return;
}
CtLocalVariable clone = localVariable.clone();
clone.setDefaultExpression(null);
localVariable.insertBefore(clone);
CtAssignment variableAssignment =
getFactory()
.Code()
.createVariableAssignment(localVariable.getReference(), false, ctConditional);
variableAssignment.setType(localVariable.getType().clone());
variableAssignment.setPosition(ctConditional.getPosition());
createAssignment(ctConditional, anIf, variableAssignment);
} else if (parent instanceof CtInvocation) {
CtInvocation invocation = (CtInvocation) parent;
CtInvocation cloneThen = invocation.clone();
CtInvocation cloneElse = invocation.clone();
List arguments = cloneThen.getArguments();
boolean found = false;
for (int i = 0; i < arguments.size(); i++) {
Object o = arguments.get(i);
if (o.equals(ctConditional)) {
ctConditional.getThenExpression().setParent(invocation);
arguments.set(i, ctConditional.getThenExpression());
ctConditional.getElseExpression().setParent(invocation);
cloneElse.getArguments().set(i, ctConditional.getElseExpression());
found = true;
break;
}
}
if (!found) {
return;
}
cloneThen.setParent(anIf);
cloneElse.setParent(anIf);
anIf.setElseStatement(getFactory().Code().createCtBlock(cloneElse));
anIf.setThenStatement(getFactory().Code().createCtBlock(cloneThen));
} else if (parent instanceof CtConstructorCall) {
CtConstructorCall invocation = (CtConstructorCall) parent;
CtConstructorCall cloneThen = invocation.clone();
CtConstructorCall cloneElse = invocation.clone();
List arguments = cloneThen.getArguments();
boolean found = false;
for (int i = 0; i < arguments.size(); i++) {
Object o = arguments.get(i);
if (o.equals(ctConditional)) {
arguments.set(i, ctConditional.getThenExpression());
cloneElse.getArguments().set(i, ctConditional.getElseExpression());
found = true;
break;
}
}
if (!found) {
return;
}
cloneThen.setParent(anIf);
cloneElse.setParent(anIf);
anIf.setElseStatement(getFactory().Code().createCtBlock(cloneElse));
anIf.setThenStatement(getFactory().Code().createCtBlock(cloneThen));
} else if (parent instanceof CtIf) {
CtIf elem = (CtIf) parent;
if (!elem.getCondition().equals(ctConditional)) {
return;
}
CtIf cloneThen = elem.clone();
cloneThen.setParent(anIf);
CtIf cloneElse = elem.clone();
cloneElse.setParent(anIf);
cloneThen.setCondition(ctConditional.getThenExpression());
ctConditional.getThenExpression().setParent(cloneThen);
cloneElse.setCondition(ctConditional.getElseExpression());
ctConditional.getElseExpression().setParent(cloneElse);
anIf.setElseStatement(getFactory().Code().createCtBlock(cloneElse));
anIf.setThenStatement(getFactory().Code().createCtBlock(cloneThen));
} else if (parent instanceof CtThrow) {
return;
} else if (parent instanceof CtLoop) {
return;
} else if (parent instanceof CtUnaryOperator) {
return;
} else {
System.err.println(parent);
throw new RuntimeException("Other " + parent.getClass());
}
/*if(ctConditional.getThenExpression().getTypeCasts() == null ||
ctConditional.getThenExpression().getTypeCasts().isEmpty()) {
((CtExpression)anIf.getThenStatement()).setTypeCasts(ctConditional.getTypeCasts());
}
if(ctConditional.getElseExpression().getTypeCasts() == null ||
ctConditional.getElseExpression().getTypeCasts().isEmpty()) {
((CtExpression) anIf.getElseStatement())
.setTypeCasts(ctConditional.getTypeCasts());
}*/
anIf.setCondition(condition);
condition.setParent(anIf);
parent.replace(anIf);
}
