[Lldb-commits] [lldb] r145471 - /lldb/trunk/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp

Greg Clayton gclayton at apple.com
Tue Nov 29 20:48:29 CST 2011


Author: gclayton
Date: Tue Nov 29 20:48:28 2011
New Revision: 145471

URL: http://llvm.org/viewvc/llvm-project?rev=145471&view=rev
Log:
Add a work around to deal with incorrect forward class definitions in 
objective C DWARF emitted by clang.


Modified:
    lldb/trunk/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp

Modified: lldb/trunk/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp?rev=145471&r1=145470&r2=145471&view=diff
==============================================================================
--- lldb/trunk/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp (original)
+++ lldb/trunk/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp Tue Nov 29 20:48:28 2011
@@ -4156,6 +4156,24 @@
                         tag_decl_kind = clang::TTK_Class;
                         default_accessibility = eAccessPrivate;
                     }
+                    
+                    if (byte_size_valid && byte_size == 0 && type_name_cstr &&
+                        die->HasChildren() == false && 
+                        sc.comp_unit->GetLanguage() == eLanguageTypeObjC)
+                    {
+                        // Work around an issue with clang at the moment where
+                        // forward declarations for objective C classes are emitted
+                        // as:
+                        //  DW_TAG_structure_type [2]  
+                        //  DW_AT_name( "ForwardObjcClass" )
+                        //  DW_AT_byte_size( 0x00 )
+                        //  DW_AT_decl_file( "..." )
+                        //  DW_AT_decl_line( 1 )
+                        //
+                        // Note that there is no DW_AT_declaration and there are
+                        // no children, and the byte size is zero.
+                        is_forward_declaration = true;
+                    }
 
                     bool look_for_complete_objc_type = false;
                     if (class_language == eLanguageTypeObjC)




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