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fix: PetComponent crashing due to nullptr access

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Resolves an issue where item is null but is accessed but not doing that code and instead consulting the EntityManager for a valid Entity, alongside nullifying the m_Owner objectID should the pet be destroyed and timer still exist.

Update PetComponent.cpp

Add nullptr check

Add back timer

Update PetComponent.cpp

speculative fix for a different crash

Why are we accessing something before checking if its null
This commit is contained in:
David Markowitz 2024-10-26 20:59:15 -07:00
parent 33a8efdd22
commit 0d218fc5c7
2 changed files with 19 additions and 18 deletions
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35
dGame/dComponents/PetComponent.cpp
View File

@ -795,8 +795,6 @@ void PetComponent::Wander() {
}
void PetComponent::Activate(Item* item, bool registerPet, bool fromTaming) {
AddDrainImaginationTimer(item, fromTaming);
m_ItemId = item->GetId();
m_DatabaseId = item->GetSubKey();
@ -807,6 +805,7 @@ void PetComponent::Activate(Item* item, bool registerPet, bool fromTaming) {
inventoryComponent->DespawnPet();
m_Owner = inventoryComponent->GetParent()->GetObjectID();
AddDrainImaginationTimer(fromTaming);
auto* owner = GetOwner();
@ -859,17 +858,14 @@ void PetComponent::Activate(Item* item, bool registerPet, bool fromTaming) {
}
}
void PetComponent::AddDrainImaginationTimer(Item* item, bool fromTaming) {
void PetComponent::AddDrainImaginationTimer(bool fromTaming) {
if (Game::config->GetValue("pets_take_imagination") != "1") return;
auto playerInventory = item->GetInventory();
if (!playerInventory) return;
auto playerInventoryComponent = playerInventory->GetComponent();
if (!playerInventoryComponent) return;
auto playerEntity = playerInventoryComponent->GetParent();
if (!playerEntity) return;
auto* playerEntity = Game::entityManager->GetEntity(m_Owner);
if (!playerEntity) {
LOG("owner was null or didnt exist!");
return;
}
auto playerDestroyableComponent = playerEntity->GetComponent<DestroyableComponent>();
if (!playerDestroyableComponent) return;
@ -878,12 +874,16 @@ void PetComponent::AddDrainImaginationTimer(Item* item, bool fromTaming) {
if (!fromTaming) playerDestroyableComponent->Imagine(-1);
// Set this to a variable so when this is called back from the player the timer doesn't fire off.
m_Parent->AddCallbackTimer(m_PetInfo.imaginationDrainRate, [playerDestroyableComponent, this, item]() {
if (!playerDestroyableComponent) {
LOG("No petComponent and/or no playerDestroyableComponent");
m_Parent->AddCallbackTimer(m_PetInfo.imaginationDrainRate, [this]() {
const auto* owner = Game::entityManager->GetEntity(m_Owner);
if (!owner) {
LOG("owner was null or didnt exist!");
return;
}
const auto* playerDestroyableComponent = owner->GetComponent<DestroyableComponent>();
if (!playerDestroyableComponent) return;
// If we are out of imagination despawn the pet.
if (playerDestroyableComponent->GetImagination() == 0) {
this->Deactivate();
@ -893,15 +893,13 @@ void PetComponent::AddDrainImaginationTimer(Item* item, bool fromTaming) {
GameMessages::SendUseItemRequirementsResponse(playerEntity->GetObjectID(), playerEntity->GetSystemAddress(), eUseItemResponse::NoImaginationForPet);
}
this->AddDrainImaginationTimer(item);
this->AddDrainImaginationTimer();
});
}
void PetComponent::Deactivate() {
GameMessages::SendPlayFXEffect(m_Parent->GetObjectID(), -1, u"despawn", "", LWOOBJID_EMPTY, 1, 1, true);
GameMessages::SendMarkInventoryItemAsActive(m_Owner, false, eUnequippableActiveType::PET, m_ItemId, GetOwner()->GetSystemAddress());
activePets.erase(m_Owner);
m_Parent->Kill();
@ -910,6 +908,8 @@ void PetComponent::Deactivate() {
if (owner == nullptr) return;
GameMessages::SendMarkInventoryItemAsActive(m_Owner, false, eUnequippableActiveType::PET, m_ItemId, owner->GetSystemAddress());
GameMessages::SendAddPetToPlayer(m_Owner, 0, u"", LWOOBJID_EMPTY, LOT_NULL, owner->GetSystemAddress());
GameMessages::SendRegisterPetID(m_Owner, LWOOBJID_EMPTY, owner->GetSystemAddress());
@ -1034,6 +1034,7 @@ Entity* PetComponent::GetParentEntity() const {
}
PetComponent::~PetComponent() {
m_Owner = LWOOBJID_EMPTY;
}
void PetComponent::SetPetNameForModeration(const std::string& petName) {

2
dGame/dComponents/PetComponent.h
View File

@ -205,7 +205,7 @@ public:
*
* @param item The item that represents this pet in the inventory.
*/
void AddDrainImaginationTimer(Item* item, bool fromTaming = false);
void AddDrainImaginationTimer(bool fromTaming = false);
private: