Revert "[lldb][DWARF] Remove object_pointer from ParsedDWARFAttributes" (llvm#145065)

Reverts llvm#144880

Caused `TestObjCIvarsInBlocks.py` to fail on macOS CI.

Author: Michael137

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

@@ -445,6 +445,15 @@ ParsedDWARFTypeAttributes::ParsedDWARFTypeAttributes(const DWARFDIE &die) {
       name.SetCString(form_value.AsCString());
       break;
 
+    case DW_AT_object_pointer:
+      // GetAttributes follows DW_AT_specification.
+      // DW_TAG_subprogram definitions and declarations may both
+      // have a DW_AT_object_pointer. Don't overwrite the one
+      // we parsed for the definition with the one from the declaration.
+      if (!object_pointer.IsValid())
+        object_pointer = form_value.Reference();
+      break;
+
     case DW_AT_signature:
       signature = form_value;
       break;
@@ -1107,7 +1116,7 @@ bool DWARFASTParserClang::ParseObjCMethod(
 std::pair<bool, TypeSP> DWARFASTParserClang::ParseCXXMethod(
     const DWARFDIE &die, CompilerType clang_type,
     const ParsedDWARFTypeAttributes &attrs, const DWARFDIE &decl_ctx_die,
-    const DWARFDIE &object_parameter, bool &ignore_containing_context) {
+    bool is_static, bool &ignore_containing_context) {
   Log *log = GetLog(DWARFLog::TypeCompletion | DWARFLog::Lookups);
   SymbolFileDWARF *dwarf = die.GetDWARF();
   assert(dwarf);
@@ -1191,9 +1200,6 @@ std::pair<bool, TypeSP> DWARFASTParserClang::ParseCXXMethod(
       TypeSystemClang::GetDeclContextForType(class_opaque_type), die,
       attrs.name.GetCString());
 
-  // In DWARF, a C++ method is static if it has no object parameter child.
-  const bool is_static = !object_parameter.IsValid();
-
   // We have a C++ member function with no children (this pointer!) and clang
   // will get mad if we try and make a function that isn't well formed in the
   // DWARF, so we will just skip it...
@@ -1219,7 +1225,9 @@ std::pair<bool, TypeSP> DWARFASTParserClang::ParseCXXMethod(
     ClangASTMetadata metadata;
     metadata.SetUserID(die.GetID());
 
-    if (char const *object_pointer_name = object_parameter.GetName()) {
+    char const *object_pointer_name =
+        attrs.object_pointer ? attrs.object_pointer.GetName() : nullptr;
+    if (object_pointer_name) {
       metadata.SetObjectPtrName(object_pointer_name);
       LLDB_LOGF(log, "Setting object pointer name: %s on method object %p.\n",
                 object_pointer_name, static_cast<void *>(cxx_method_decl));
@@ -1315,9 +1323,11 @@ DWARFASTParserClang::ParseSubroutine(const DWARFDIE &die,
         type_handled =
             ParseObjCMethod(*objc_method, die, clang_type, attrs, is_variadic);
       } else if (is_cxx_method) {
+        // In DWARF, a C++ method is static if it has no object parameter child.
+        const bool is_static = !object_parameter.IsValid();
         auto [handled, type_sp] =
-            ParseCXXMethod(die, clang_type, attrs, decl_ctx_die,
-                           object_parameter, ignore_containing_context);
+            ParseCXXMethod(die, clang_type, attrs, decl_ctx_die, is_static,
+                           ignore_containing_context);
         if (type_sp)
           return type_sp;
 
@@ -1412,7 +1422,9 @@ DWARFASTParserClang::ParseSubroutine(const DWARFDIE &die,
           ClangASTMetadata metadata;
           metadata.SetUserID(die.GetID());
 
-          if (char const *object_pointer_name = object_parameter.GetName()) {
+          char const *object_pointer_name =
+              attrs.object_pointer ? attrs.object_pointer.GetName() : nullptr;
+          if (object_pointer_name) {
             metadata.SetObjectPtrName(object_pointer_name);
             LLDB_LOGF(log,
                       "Setting object pointer name: %s on function "

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

@@ -470,8 +470,7 @@ class DWARFASTParserClang : public lldb_private::plugin::dwarf::DWARFASTParser {
   /// \param[in] decl_ctx_die The DIE representing the DeclContext of the C++
   ///                         method being parsed.
   ///
-  /// \param[in] object_parameter The DIE of this subprogram's object parameter.
-  ///                             May be an invalid DIE for C++ static methods.
+  /// \param[in] is_static Is true iff we're parsing a static method.
   ///
   /// \param[out] ignore_containing_context Will get set to true if the caller
   ///             should treat this C++ method as-if it was not a C++ method.
@@ -486,8 +485,7 @@ class DWARFASTParserClang : public lldb_private::plugin::dwarf::DWARFASTParser {
                  lldb_private::CompilerType clang_type,
                  const ParsedDWARFTypeAttributes &attrs,
                  const lldb_private::plugin::dwarf::DWARFDIE &decl_ctx_die,
-                 const lldb_private::plugin::dwarf::DWARFDIE &object_parameter,
-                 bool &ignore_containing_context);
+                 bool is_static, bool &ignore_containing_context);
 
   lldb::TypeSP ParseArrayType(const lldb_private::plugin::dwarf::DWARFDIE &die,
                               const ParsedDWARFTypeAttributes &attrs);
@@ -557,6 +555,7 @@ struct ParsedDWARFTypeAttributes {
   const char *mangled_name = nullptr;
   lldb_private::ConstString name;
   lldb_private::Declaration decl;
+  lldb_private::plugin::dwarf::DWARFDIE object_pointer;
   lldb_private::plugin::dwarf::DWARFFormValue abstract_origin;
   lldb_private::plugin::dwarf::DWARFFormValue containing_type;
   lldb_private::plugin::dwarf::DWARFFormValue signature;