Debugger: Fix #13939, more work on #13800.

- Fix various cases where OpenHashTables weren't being cleared properly.
- Fix various reference counting errors.
- Simplify FileManager reference handling.
- Fix bug in LocatableDirectory where the directory named '/' would have its
  name returned as empty. This would lead to failed lookups for entries already
  in the table, and ultimately corrupted the hash table when deleting unused
  entries, leading to #13939. This was previously never noticed due to the
  entries not being freed properly.
- AbbreviationTable wasn't clearing its entries.

src/apps/debugger/user_interface/gui/model/VariablesViewState.cpp

@@ -261,4 +261,5 @@ VariablesViewState::_Cleanup()
 	}
 
 	SetValues(NULL);
+	SetExpressionValues(NULL);
 }

src/apps/debugger/user_interface/gui/team_window/SourceView.cpp

@@ -2175,7 +2175,7 @@ SourceView::SetStackTrace(StackTrace* stackTrace, Thread* activeThread)
 {
 	TRACE_GUI("SourceView::SetStackTrace(%p)\n", stackTrace);
 
-	if (stackTrace == fStackTrace)
+	if (stackTrace == fStackTrace && activeThread == fActiveThread)
 		return;
 
 	if (fActiveThread != NULL)

src/apps/debugger/user_interface/gui/team_window/VariablesView.cpp

@@ -1324,6 +1324,7 @@ VariablesView::VariableTableModel::ValueNodeValueChanged(ValueNode* valueNode)
 	if (error != B_OK)
 		return;
 
+	BReference<TableCellValueRenderer> rendererReference(renderer, true);
 	// set value/handler/renderer
 	modelNode->SetValue(value);
 	modelNode->SetValueHandler(valueHandler);
@@ -1337,8 +1338,6 @@ VariablesView::VariableTableModel::ValueNodeValueChanged(ValueNode* valueNode)
 			settings->RestoreValues(modelNode->GetLastRendererSettings());
 	}
 
-
-
 	// notify table model listeners
 	NotifyNodeChanged(modelNode);
 }
@@ -1803,6 +1802,17 @@ VariablesView::~VariablesView()
 
 	if (fTemporaryExpression != NULL)
 		fTemporaryExpression->ReleaseReference();
+
+	if (fExpressions != NULL) {
+		ExpressionInfoEntry* entry = fExpressions->Clear();
+		while (entry != NULL) {
+			ExpressionInfoEntry* next = entry->next;
+			delete entry;
+			entry = next;
+		}
+	}
+
+	delete fExpressions;
 }
 
 
@@ -2246,6 +2256,7 @@ VariablesView::MessageReceived(BMessage* message)
 		{
 			ModelNode* node;
 			if (message->FindPointer("node", (void**)&node) == B_OK) {
+				BReference<ModelNode> nodeReference(node, true);
 				TreeTablePath path;
 				if (fVariableTableModel->GetTreePath(node, path)) {
 					FunctionID* functionID = fStackFrame->Function()

src/apps/debugger/user_interface/gui/value/value_handlers/IntegerValueHandler.cpp

@@ -343,10 +343,9 @@ IntegerValueHandler::AddIntegerFormatOption(OptionsSettingImpl* setting,
 	const char* id, const char* name, integer_format format)
 {
 	FormatOption* option = new(std::nothrow) FormatOption(id, name, format);
-	if (option == NULL || !setting->AddOption(option)) {
-		delete option;
+	BReference<FormatOption> optionReference(option, true);
+	if (option == NULL || !setting->AddOption(option))
 		return B_NO_MEMORY;
-	}
 
 	return B_OK;
 }

src/kits/debugger/debug_info/DwarfImageDebugInfo.cpp

@@ -1111,7 +1111,7 @@ DwarfImageDebugInfo::_GetSourceFileIndex(CompilationUnit* unit,
 	for (int32 i = 0; const char* fileName = unit->FileAt(i, &directory); i++) {
 		LocatableFile* file = fFileManager->GetSourceFile(directory, fileName);
 		if (file != NULL) {
-			file->ReleaseReference();
+			BReference<LocatableFile> fileReference(file, true);
 			if (file == sourceFile) {
 				return i + 1;
 					// indices are one-based

src/kits/debugger/debug_managers/ValueNodeManager.cpp

@@ -52,6 +52,9 @@ ValueNodeManager::SetStackFrame(Thread* thread,
 	fStackFrame = stackFrame;
 	fThread = thread;
 
+	if (fStackFrame == NULL)
+		return B_OK;
+
 	fContainer = new(std::nothrow) ValueNodeContainer;
 	if (fContainer == NULL)
 		return B_NO_MEMORY;

src/kits/debugger/dwarf/AbbreviationTable.cpp

@@ -21,6 +21,12 @@ AbbreviationTable::AbbreviationTable(off_t offset)
 
 AbbreviationTable::~AbbreviationTable()
 {
+	AbbreviationTableEntry* entry = fEntryTable.Clear(true);
+	while (entry != NULL) {
+		AbbreviationTableEntry* next = entry->next;
+		delete entry;
+		entry = next;
+	}
 }
 
 

src/kits/debugger/files/FileManager.cpp

@@ -124,9 +124,6 @@ public:
 			entry->ReleaseReference();
 			entry = next;
 		}
-
-		while ((entry = fDeadEntries.RemoveHead()) != NULL)
-			entry->ReleaseReference();
 	}
 
 	status_t Init()
@@ -202,21 +199,10 @@ private:
 		AutoLocker<FileManager> lock(fManager);
 		if (fEntries.Lookup(EntryPath(entry)) == entry)
 			fEntries.Remove(entry);
-		else {
-			DeadEntryList::Iterator iterator = fDeadEntries.GetIterator();
-			while (iterator.HasNext()) {
-				if (iterator.Next() == entry) {
-					fDeadEntries.Remove(entry);
-					break;
-				}
-			}
-		}
 
 		LocatableDirectory* parent = entry->Parent();
 		if (parent != NULL)
 			parent->RemoveEntry(entry);
-
-		delete entry;
 	}
 
 	bool _LocateDirectory(LocatableDirectory* directory,
@@ -306,23 +292,23 @@ private:
 
 	LocatableFile* _GetFile(const BString& directoryPath, const BString& name)
 	{
+		BString normalizedDirPath;
+		_NormalizePath(directoryPath, normalizedDirPath);
+
 		// if already known return the file
-		LocatableEntry* entry = _LookupEntry(EntryPath(directoryPath, name));
+		LocatableEntry* entry = _LookupEntry(EntryPath(normalizedDirPath, name));
 		if (entry != NULL) {
 			LocatableFile* file = dynamic_cast<LocatableFile*>(entry);
 			if (file == NULL)
 				return NULL;
 
-			if (file->AcquireReference() == 0) {
+			if (file->AcquireReference() == 0)
 				fEntries.Remove(file);
-				fDeadEntries.Insert(file);
-			} else
+			else
 				return file;
 		}
 
 		// no such file yet -- create it
-		BString normalizedDirPath;
-		_NormalizePath(directoryPath, normalizedDirPath);
 		LocatableDirectory* directory = _GetDirectory(normalizedDirPath);
 		if (directory == NULL)
 			return NULL;
@@ -337,6 +323,7 @@ private:
 		directory->AddEntry(file);
 
 		fEntries.Insert(file);
+
 		return file;
 	}
 
@@ -488,7 +475,6 @@ private:
 private:
 	FileManager*		fManager;
 	LocatableEntryTable	fEntries;
-	DeadEntryList		fDeadEntries;
 	bool				fIsLocal;
 };
 

src/kits/debugger/files/FileManager.h

@@ -65,7 +65,6 @@ private:
 			struct SourceFileHashDefinition;
 
 			typedef BOpenHashTable<EntryHashDefinition> LocatableEntryTable;
-			typedef DoublyLinkedList<LocatableEntry> DeadEntryList;
 			typedef BOpenHashTable<SourceFileHashDefinition> SourceFileTable;
 			typedef std::map<BString, BString> LocatedFileMap;
 
@@ -83,7 +82,6 @@ private:
 			Domain*				fTargetDomain;
 			Domain*				fSourceDomain;
 			SourceFileTable*	fSourceFiles;
-
 			LocatedFileMap		fSourceLocationMappings;
 };
 

src/kits/debugger/files/LocatableDirectory.cpp

@@ -24,6 +24,9 @@ LocatableDirectory::~LocatableDirectory()
 const char*
 LocatableDirectory::Name() const
 {
+	if (fPath.Length() <= 1)
+		return fPath;
+
 	int32 lastSlash = fPath.FindLast('/');
 		// return -1, if not found
 	return fPath.String() + (lastSlash + 1);

src/kits/debugger/files/LocatableEntry.cpp

@@ -44,4 +44,5 @@ void
 LocatableEntry::LastReferenceReleased()
 {
 	fOwner->LocatableEntryUnused(this);
+	delete this;
 }

src/kits/debugger/model/StackFrame.cpp

@@ -54,6 +54,12 @@ StackFrame::~StackFrame()
 
 	fDebugInfo->ReleaseReference();
 	fCpuState->ReleaseReference();
+
+	if (fValues != NULL)
+		fValues->ReleaseReference();
+
+	if (fValueInfos != NULL)
+		fValueInfos->ReleaseReference();
 }
 
 

src/kits/debugger/settings/TeamSettings.cpp

@@ -44,6 +44,8 @@ TeamSettings::TeamSettings(const TeamSettings& other)
 TeamSettings::~TeamSettings()
 {
 	_Unset();
+	delete fFileManagerSettings;
+	delete fSignalSettings;
 }
 
 

src/kits/debugger/value/ValueNodeContainer.cpp

@@ -69,6 +69,7 @@ ValueNodeContainer::RemoveChild(ValueNodeChild* child)
 	if (child->Container() != this || !fChildren.RemoveItem(child))
 		return;
 
+	child->SetNode(NULL);
 	child->SetContainer(NULL);
 	child->ReleaseReference();
 }
@@ -78,6 +79,7 @@ void
 ValueNodeContainer::RemoveAllChildren()
 {
 	for (int32 i = 0; ValueNodeChild* child = ChildAt(i); i++) {
+		child->SetNode(NULL);
 		child->SetContainer(NULL);
 		child->ReleaseReference();
 	}

src/kits/debugger/value/value_nodes/BListValueNode.cpp

@@ -213,8 +213,6 @@ BListValueNode::ResolvedLocationAndValue(ValueLoader* valueLoader,
 	// load the value data
 
 	status_t error = B_OK;
-	_location = location;
-	_value = NULL;
 
 	ValueLocation* memberLocation = NULL;
 	CompoundType* baseType = dynamic_cast<CompoundType*>(fType);
@@ -290,6 +288,10 @@ BListValueNode::ResolvedLocationAndValue(ValueLoader* valueLoader,
 		memberLocation = NULL;
 	}
 
+	location->AcquireReference();
+	_location = location;
+	_value = NULL;
+
 	return B_OK;
 }
 

src/kits/debugger/value/value_nodes/BMessageValueNode.cpp

@@ -164,9 +164,6 @@ BMessageValueNode::ResolvedLocationAndValue(ValueLoader* valueLoader,
 	// load the value data
 
 	status_t error = B_OK;
-	_location = location;
-	_value = NULL;
-
 	ValueLocation* memberLocation = NULL;
 
 	BVariant headerAddress;
@@ -318,6 +315,10 @@ BMessageValueNode::ResolvedLocationAndValue(ValueLoader* valueLoader,
 	if (error != B_OK)
 		return error;
 
+	location->AcquireReference();
+	_location = location;
+	_value = NULL;
+
 	return B_OK;
 }