Only report total currently loaded debug info

Author: kusmour

lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp

@@ -896,8 +896,9 @@ void DWARFUnit::ComputeAbsolutePath() {
     m_file_spec->MakeAbsolute(GetCompilationDirectory());
 }
 
-SymbolFileDWARFDwo *DWARFUnit::GetDwoSymbolFile() {
-  ExtractUnitDIEIfNeeded();
+SymbolFileDWARFDwo *DWARFUnit::GetDwoSymbolFile(bool load_if_needed) {
+  if (load_if_needed)
+    ExtractUnitDIEIfNeeded();
   if (m_dwo)
     return &llvm::cast<SymbolFileDWARFDwo>(m_dwo->GetSymbolFileDWARF());
   return nullptr;

lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.h

@@ -241,7 +241,7 @@ class DWARFUnit : public UserID {
   FileSpec GetFile(size_t file_idx);
   FileSpec::Style GetPathStyle();
 
-  SymbolFileDWARFDwo *GetDwoSymbolFile();
+  SymbolFileDWARFDwo *GetDwoSymbolFile(bool load_if_needed = true);
 
   die_iterator_range dies() {
     ExtractDIEsIfNeeded();

lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp

@@ -2687,7 +2687,7 @@ uint64_t SymbolFileDWARF::GetDebugInfoSize() {
     if (cu == nullptr)
       continue;
 
-    SymbolFileDWARFDwo *dwo = cu->GetDwoSymbolFile();
+    SymbolFileDWARFDwo *dwo = cu->GetDwoSymbolFile(false);
     if (dwo)
       debug_info_size += dwo->GetDebugInfoSize();
   }

lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h

@@ -186,6 +186,10 @@ class SymbolFileDWARF : public SymbolFileCommon {
   GetMangledNamesForFunction(const std::string &scope_qualified_name,
                              std::vector<ConstString> &mangled_names) override;
 
+  // Return total currently loaded debug info
+  // For cases like .dwo files, the debug info = skeleton debug info + all dwo
+  // debug info where .dwo files might not be loaded yet. Calling this function
+  // will not force the loading of any .dwo files.
   uint64_t GetDebugInfoSize() override;
 
   void FindTypes(const lldb_private::TypeQuery &match,