void SpecialFunctionHandler::handleRealloc(ExecutionState &state,
KInstruction *target,
std::vector<ref<Expr> > &arguments) {
// XXX should type check args
assert(arguments.size()==2 &&
"invalid number of arguments to realloc");
ref<Expr> address = arguments[0];
ref<Expr> size = arguments[1];
Executor::StatePair zeroSize = executor.fork(state,
Expr::createIsZero(size),
true);
if (zeroSize.first) { // size == 0
executor.executeFree(*zeroSize.first, address, target);
}
if (zeroSize.second) { // size != 0
Executor::StatePair zeroPointer = executor.fork(*zeroSize.second,
Expr::createIsZero(address),
true);
if (zeroPointer.first) { // address == 0
executor.executeAlloc(*zeroPointer.first, size, false, target);
}
if (zeroPointer.second) { // address != 0
Executor::ExactResolutionList rl;
executor.resolveExact(*zeroPointer.second, address, rl, "realloc");
for (Executor::ExactResolutionList::iterator it = rl.begin(),
ie = rl.end(); it != ie; ++it) {
executor.executeAlloc(*it->second, size, false, target, false,
it->first.second);
}
}
}
}
