Add misc cancellation points in RTTI analysis

Some missing checks in case there is a billion segments (see .obj files)

Author: emesare

plugins/rtti/itanium.cpp

@@ -685,6 +685,8 @@ void ItaniumRTTIProcessor::ProcessRTTI()
     // Scan data sections for rtti.
     for (const Ref<Section> &section: m_view->GetSections())
     {
+        if (bgTask->IsCancelled())
+            break;
         if (section->GetSemantics() == ReadOnlyDataSectionSemantics)
         {
             m_logger->LogDebug("Attempting to find RTTI in section %llx", section->GetStart());

plugins/rtti/microsoft.cpp

@@ -733,6 +733,8 @@ void MicrosoftRTTIProcessor::ProcessVFT()
         auto rdataSection = m_view->GetSectionByName(".rdata");
         for (const Ref<Segment> &segment: m_view->GetSegments())
         {
+            if (bgTask->IsCancelled())
+                break;
             if (segment->GetFlags() == (SegmentReadable | SegmentContainsData))
             {
                 m_logger->LogDebug("Attempting to find VirtualFunctionTables in segment %llx", segment->GetStart());