ActiveGrenade: Fixed a potential leak by checking entities smokegrens life if RemoveGrenade call is somehow missing or blocked

Author: s1lentq

regamedll/game_shared/bot/bot.cpp

@@ -491,9 +491,15 @@ void ActiveGrenade::OnEntityGone()
 	m_entity = nullptr;
 }
 
+void ActiveGrenade::CheckOnEntityGone()
+{
+	if (m_dieTimestamp == 0 && !m_entity.IsValid())
+		OnEntityGone();
+}
+
 bool ActiveGrenade::IsValid() const
 {
-	if (!m_entity)
+	if (!m_entity.IsValid())
 	{
 		if (gpGlobals->time > m_dieTimestamp)
 			return false;
@@ -502,7 +508,7 @@ bool ActiveGrenade::IsValid() const
 	return true;
 }
 
-const Vector *ActiveGrenade::GetPosition() const
+const Vector *ActiveGrenade::GetPosition()
 {
 	return &m_entity->pev->origin;
 }

regamedll/game_shared/bot/bot_manager.cpp

@@ -147,6 +147,8 @@ void CBotManager::StartFrame()
 			ActiveGrenade *ag = (*iter);
 
 			// lazy validation
+			ag->CheckOnEntityGone();
+
 			if (!ag->IsValid())
 			{
 				delete ag;
@@ -203,6 +205,8 @@ void CBotManager::StartFrame()
 			pBot->BotThink();
 		}
 	}
+
+	ValidateActiveGrenades();
 }
 
 // Return the filename for this map's "nav map" file
@@ -278,13 +282,16 @@ void CBotManager::RemoveGrenade(CGrenade *grenade)
 }
 
 // Destroy any invalid active grenades
-NOXREF void CBotManager::ValidateActiveGrenades()
+void CBotManager::ValidateActiveGrenades()
 {
 	auto iter = m_activeGrenadeList.begin();
 	while (iter != m_activeGrenadeList.end())
 	{
 		ActiveGrenade *ag = (*iter);
 
+		// lazy validation
+		ag->CheckOnEntityGone();
+
 		if (!ag->IsValid())
 		{
 			delete ag;
@@ -314,6 +321,8 @@ bool CBotManager::IsInsideSmokeCloud(const Vector *pos)
 		ActiveGrenade *ag = (*iter);
 
 		// lazy validation
+		ag->CheckOnEntityGone();
+
 		if (!ag->IsValid())
 		{
 			delete ag;
@@ -358,6 +367,8 @@ bool CBotManager::IsLineBlockedBySmoke(const Vector *from, const Vector *to)
 		ActiveGrenade *ag = (*iter);
 
 		// lazy validation
+		ag->CheckOnEntityGone();
+
 		if (!ag->IsValid())
 		{
 			delete ag;

regamedll/game_shared/bot/bot_manager.h

@@ -42,16 +42,17 @@ class ActiveGrenade
 	ActiveGrenade(int weaponID, CGrenade *grenadeEntity);
 
 	void OnEntityGone();
+	void CheckOnEntityGone();
 	bool IsValid() const;
 
-	bool IsEntity(CGrenade *grenade) const { return (grenade == m_entity) ? true : false; }
+	bool IsEntity(CGrenade *grenade) const { return grenade == m_entity; }
 	int GetID() const { return m_id; }
 	const Vector *GetDetonationPosition() const { return &m_detonationPosition; }
-	const Vector *GetPosition() const;
+	const Vector *GetPosition();
 
 private:
 	int m_id;
-	CGrenade *m_entity;
+	EntityHandle<CGrenade> m_entity;
 	Vector m_detonationPosition;
 	float m_dieTimestamp;
 };