Fix how the mark-serial is used.

The mark-serial is a generation number to optimize dependency tracking. It did not actually get
applied correctly, meaning that in rare cases we could miss dependencies. This patch removes the
incorrect serial propagation and ensures that we don't double-count a dependent plugin.

Additionally, this patch ensures that all callers of BindNativeToPlugin() will update the mark
serial, as is required to correctly track dependencies.

core/logic/NativeOwner.cpp

@@ -48,6 +48,7 @@ unsigned int CNativeOwner::GetMarkSerial()
 
 void CNativeOwner::AddDependent(CPlugin *pPlugin)
 {
+	if (m_Dependents.find(pPlugin) == m_Dependents.end())
 		m_Dependents.push_back(pPlugin);
 }
 
@@ -64,23 +65,8 @@ void CNativeOwner::AddNatives(const sp_nativeinfo_t *natives)
 	m_natives.append(natives);
 }
 
-void CNativeOwner::PropagateMarkSerial(unsigned int serial)
-{
-	CNativeOwner *pOwner;
-	List<CPlugin *>::iterator iter;
-
-	for (iter = m_Dependents.begin();
-		 iter != m_Dependents.end();
-		 iter++)
-	{
-		pOwner = (*iter);
-		pOwner->SetMarkSerial(serial);
-	}
-}
-
 void CNativeOwner::UnbindWeakRef(const WeakNative &ref)
 {
-	sp_native_t *native;
 	IPluginContext *pContext;
 
 	pContext = ref.pl->GetBaseContext();

core/logic/NativeOwner.h

@@ -69,7 +69,6 @@ public:
 public:
 	void SetMarkSerial(unsigned int serial);
 	unsigned int GetMarkSerial();
-	void PropagateMarkSerial(unsigned int serial);
 public:
 	void AddDependent(CPlugin *pPlugin);
 	void AddWeakRef(const WeakNative & ref);

core/logic/PluginSys.cpp

@@ -1381,6 +1381,7 @@ bool CPluginManager::RunSecondPass(CPlugin *pPlugin, char *error, size_t maxleng
 					  || pOther->GetStatus() == Plugin_Paused)
 					 && pOther != pPlugin)
 			{
+				g_ShareSys.BeginBindingFor(pPlugin);
 				for (size_t i = 0; i < pPlugin->m_fakes.length(); i++)
 					g_ShareSys.BindNativeToPlugin(pOther, pPlugin->m_fakes[i]);
 			}

core/logic/ShareSys.cpp

@@ -269,19 +269,19 @@ PassRef<Native> ShareSystem::FindNative(const char *name)
 	return *r;
 }
 
+void ShareSystem::BeginBindingFor(CPlugin *pPlugin)
+{
+	g_mark_serial++;
+}
+
 void ShareSystem::BindNativesToPlugin(CPlugin *pPlugin, bool bCoreOnly)
 {
-	uint32_t i, native_count;
-	IPluginContext *pContext;
+	IPluginContext *pContext = pPlugin->GetBaseContext();
 
-	pContext = pPlugin->GetBaseContext();
+	BeginBindingFor(pPlugin);
 
-	/* Generate a new serial ID, mark our dependencies with it. */
-	g_mark_serial++;
-	pPlugin->PropagateMarkSerial(g_mark_serial);
-
-	native_count = pContext->GetNativesNum();
-	for (i = 0; i < native_count; i++)
+	uint32_t native_count = pContext->GetNativesNum();
+	for (uint32_t i = 0; i < native_count; i++)
 	{
 		const sp_native_t *native = pContext->GetRuntime()->GetNative(i);
 		if (!native)
@@ -349,15 +349,12 @@ void ShareSystem::BindNativeToPlugin(CPlugin *pPlugin, const sp_native_t *native
 		/* Otherwise, we're a strong dependent and not a weak one */
 		else
 		{
-			/* See if this has already been marked as a dependent.
-			 * If it has, it means this relationship has already occurred, 
-			 * and there is no reason to do it again.
-			 */
-			if (pEntry->owner != pPlugin->ToNativeOwner() 
-				&& pEntry->owner->GetMarkSerial() != g_mark_serial)
+			// If this plugin is not binding to itself, and it hasn't been marked as a
+			// dependency already, then add it now. We use the mark serial to track
+			// which plugins we already consider a dependency.
+			if (pEntry->owner != pPlugin->ToNativeOwner() &&
+			    pEntry->owner->GetMarkSerial() != g_mark_serial)
 			{
-				/* This has not been marked as a dependency yet */
-				//pPlugin->AddDependency(pEntry->owner);
 				pEntry->owner->AddDependent(pPlugin);
 				pEntry->owner->SetMarkSerial(g_mark_serial);
 			}

core/logic/ShareSys.h

@@ -119,6 +119,7 @@ public:
 		return &m_IdentRoot;
 	}
 public:
+	void BeginBindingFor(CPlugin *pPlugin);
 	void BindNativesToPlugin(CPlugin *pPlugin, bool bCoreOnly);
 	void BindNativeToPlugin(CPlugin *pPlugin, const ke::Ref<Native> &pEntry);
 	ke::PassRef<Native> AddFakeNative(IPluginFunction *pFunc, const char *name, SPVM_FAKENATIVE_FUNC func);