C++ SymbolReaper::isLiveRegion方法代码示例

void IteratorChecker::checkDeadSymbols(SymbolReaper &SR,
                                       CheckerContext &C) const {
  // Cleanup
  auto State = C.getState();

  auto RegionMap = State->get<IteratorRegionMap>();
  for (const auto Reg : RegionMap) {
    if (!SR.isLiveRegion(Reg.first)) {
      State = State->remove<IteratorRegionMap>(Reg.first);
    }
  }

  auto SymbolMap = State->get<IteratorSymbolMap>();
  for (const auto Sym : SymbolMap) {
    if (!SR.isLive(Sym.first)) {
      State = State->remove<IteratorSymbolMap>(Sym.first);
    }
  }

  auto ContMap = State->get<ContainerMap>();
  for (const auto Cont : ContMap) {
    if (!SR.isLiveRegion(Cont.first)) {
      State = State->remove<ContainerMap>(Cont.first);
    }
  }

  auto ComparisonMap = State->get<IteratorComparisonMap>();
  for (const auto Comp : ComparisonMap) {
    if (!SR.isLive(Comp.first)) {
      State = State->remove<IteratorComparisonMap>(Comp.first);
    }
  }
}

void DynamicTypePropagation::checkDeadSymbols(SymbolReaper &SR,
                                              CheckerContext &C) const {
  ProgramStateRef State = C.getState();
  DynamicTypeMapImpl TypeMap = State->get<DynamicTypeMap>();
  for (DynamicTypeMapImpl::iterator I = TypeMap.begin(), E = TypeMap.end();
       I != E; ++I) {
    if (!SR.isLiveRegion(I->first)) {
      State = State->remove<DynamicTypeMap>(I->first);
    }
  }

  if (!SR.hasDeadSymbols()) {
    C.addTransition(State);
    return;
  }

  MostSpecializedTypeArgsMapTy TyArgMap =
      State->get<MostSpecializedTypeArgsMap>();
  for (MostSpecializedTypeArgsMapTy::iterator I = TyArgMap.begin(),
                                              E = TyArgMap.end();
       I != E; ++I) {
    if (SR.isDead(I->first)) {
      State = State->remove<MostSpecializedTypeArgsMap>(I->first);
    }
  }

  C.addTransition(State);
}

void MoveChecker::checkDeadSymbols(SymbolReaper &SymReaper,
                                   CheckerContext &C) const {
  ProgramStateRef State = C.getState();
  TrackedRegionMapTy TrackedRegions = State->get<TrackedRegionMap>();
  for (TrackedRegionMapTy::value_type E : TrackedRegions) {
    const MemRegion *Region = E.first;
    bool IsRegDead = !SymReaper.isLiveRegion(Region);

    // Remove the dead regions from the region map.
    if (IsRegDead) {
      State = State->remove<TrackedRegionMap>(Region);
    }
  }
  C.addTransition(State);
}

/// Cleaning up the program state.
void NullabilityChecker::checkDeadSymbols(SymbolReaper &SR,
                                          CheckerContext &C) const {
  ProgramStateRef State = C.getState();
  NullabilityMapTy Nullabilities = State->get<NullabilityMap>();
  for (NullabilityMapTy::iterator I = Nullabilities.begin(),
                                  E = Nullabilities.end();
       I != E; ++I) {
    if (!SR.isLiveRegion(I->first)) {
      State = State->remove<NullabilityMap>(I->first);
    }
  }
  // When one of the nonnull arguments are constrained to be null, nullability
  // preconditions are violated. It is not enough to check this only when we
  // actually report an error, because at that time interesting symbols might be
  // reaped.
  if (checkPreconditionViolation(State, C.getPredecessor(), C))
    return;
  C.addTransition(State);
}

void InnerPointerChecker::checkDeadSymbols(SymbolReaper &SymReaper,
                                           CheckerContext &C) const {
  ProgramStateRef State = C.getState();
  PtrSet::Factory &F = State->getStateManager().get_context<PtrSet>();
  RawPtrMapTy RPM = State->get<RawPtrMap>();
  for (const auto Entry : RPM) {
    if (!SymReaper.isLiveRegion(Entry.first)) {
      // Due to incomplete destructor support, some dead regions might
      // remain in the program state map. Clean them up.
      State = State->remove<RawPtrMap>(Entry.first);
    }
    if (const PtrSet *OldSet = State->get<RawPtrMap>(Entry.first)) {
      PtrSet CleanedUpSet = *OldSet;
      for (const auto Symbol : Entry.second) {
        if (!SymReaper.isLive(Symbol))
          CleanedUpSet = F.remove(CleanedUpSet, Symbol);
      }
      State = CleanedUpSet.isEmpty()
                  ? State->remove<RawPtrMap>(Entry.first)
                  : State->set<RawPtrMap>(Entry.first, CleanedUpSet);
    }
  }
  C.addTransition(State);
}

void MPIChecker::checkMissingWaits(SymbolReaper &SymReaper,
                                   CheckerContext &Ctx) const {
  if (!SymReaper.hasDeadSymbols())
    return;

  ProgramStateRef State = Ctx.getState();
  const auto &Requests = State->get<RequestMap>();
  if (Requests.isEmpty())
    return;

  static CheckerProgramPointTag Tag("MPI-Checker", "MissingWait");
  ExplodedNode *ErrorNode{nullptr};

  auto ReqMap = State->get<RequestMap>();
  for (const auto &Req : ReqMap) {
    if (!SymReaper.isLiveRegion(Req.first)) {
      if (Req.second.CurrentState == Request::State::Nonblocking) {

        if (!ErrorNode) {
          ErrorNode = Ctx.generateNonFatalErrorNode(State, &Tag);
          State = ErrorNode->getState();
        }
        BReporter.reportMissingWait(Req.second, Req.first, ErrorNode,
                                    Ctx.getBugReporter());
      }
      State = State->remove<RequestMap>(Req.first);
    }
  }

  // Transition to update the state regarding removed requests.
  if (!ErrorNode) {
    Ctx.addTransition(State);
  } else {
    Ctx.addTransition(State, ErrorNode);
  }
}