[lldb] [llvm] [lldb][DWARF] Replace lldb's DWARFDebugArangeSet with llvm's (PR #110058)

[Jonas Devlieghere via llvm-commits]

================
@@ -7,65 +7,45 @@
 //===----------------------------------------------------------------------===//
 
 #include "DWARFDebugAranges.h"
-#include "DWARFDebugArangeSet.h"
 #include "DWARFUnit.h"
 #include "LogChannelDWARF.h"
 #include "lldb/Utility/Log.h"
 #include "lldb/Utility/Timer.h"
+#include "llvm/DebugInfo/DWARF/DWARFDebugArangeSet.h"
 
 using namespace lldb;
 using namespace lldb_private;
 using namespace lldb_private::plugin::dwarf;
+using llvm::DWARFDebugArangeSet;
 
 // Constructor
 DWARFDebugAranges::DWARFDebugAranges() : m_aranges() {}
 
-// CountArangeDescriptors
-class CountArangeDescriptors {
-public:
-  CountArangeDescriptors(uint32_t &count_ref) : count(count_ref) {
-    //      printf("constructor CountArangeDescriptors()\n");
-  }
-  void operator()(const DWARFDebugArangeSet &set) {
-    count += set.NumDescriptors();
-  }
-  uint32_t &count;
-};
-
 // Extract
 void DWARFDebugAranges::extract(const DWARFDataExtractor &debug_aranges_data) {
+  llvm::DWARFDataExtractor llvm_dwarf_data =
+      debug_aranges_data.GetAsLLVMDWARF();
   lldb::offset_t offset = 0;
 
   DWARFDebugArangeSet set;
   Range range;
-  while (debug_aranges_data.ValidOffset(offset)) {
+  while (llvm_dwarf_data.isValidOffset(offset)) {
     const lldb::offset_t set_offset = offset;
-    if (llvm::Error error = set.extract(debug_aranges_data, &offset)) {
+    if (llvm::Error error = set.extract(llvm_dwarf_data, &offset, nullptr)) {
----------------
JDevlieghere wrote:

Nit: What's the `nullptr`? Can you add an inline comment with the argument name? Same thing below. 

https://github.com/llvm/llvm-project/pull/110058