public static Set<ValueNumber> checkNonNullParams(
Location location,
ValueNumberFrame vnaFrame,
ConstantPoolGen constantPool,
@CheckForNull Method method,
@CheckForNull IsNullValueFrame invFrame)
throws DataflowAnalysisException {
if (invFrame != null && !invFrame.isValid()) {
return Collections.emptySet();
}
INullnessAnnotationDatabase database =
AnalysisContext.currentAnalysisContext().getNullnessAnnotationDatabase();
InvokeInstruction inv = (InvokeInstruction) location.getHandle().getInstruction();
XMethod called = XFactory.createXMethod(inv, constantPool);
SignatureParser sigParser = new SignatureParser(called.getSignature());
int numParams = sigParser.getNumParameters();
Set<ValueNumber> result = new HashSet<ValueNumber>();
Iterator<String> parameterIterator = sigParser.parameterSignatureIterator();
for (int i = 0; i < numParams; i++) {
String parameterSignature = parameterIterator.next();
char firstChar = parameterSignature.charAt(0);
if (firstChar != 'L' && firstChar != '[') {
continue;
}
int offset = sigParser.getSlotsFromTopOfStackForParameter(i);
if (invFrame != null) {
int slot = invFrame.getStackLocation(offset);
if (!reportDereference(invFrame, slot)) {
continue;
}
}
if (database.parameterMustBeNonNull(called, i)) {
int catchSizeNPE =
Util.getSizeOfSurroundingTryBlock(
method, "java/lang/NullPointerException", location.getHandle().getPosition());
int catchSizeNFE =
Util.getSizeOfSurroundingTryBlock(
method, "java/lang/NumberFormatException", location.getHandle().getPosition());
if (catchSizeNPE == Integer.MAX_VALUE
&& (!"java.lang.Integer".equals(called.getClassName())
|| catchSizeNFE == Integer.MAX_VALUE)) {
// Get the corresponding value number
ValueNumber vn = vnaFrame.getArgument(inv, constantPool, i, sigParser);
result.add(vn);
}
}
}
return result;
}
