The debugger sometimes lookup dynamically in the runtime to find ivar info of any Objective-C classes. It would be very helpful to debugger if the compiler encodes runtime version number in DWARF.
Add support for two additional DWARF attributes to encode Objective-C runtime version number.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64834 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfWriter.cpp b/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
index 5e79a81..3368f5d 100644
--- a/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
@@ -1770,6 +1770,9 @@
DIDerivedType(Element.getGV()));
Buffer.AddChild(ElemDie);
}
+ unsigned RLang = CTy.getRunTimeLang();
+ if (RLang)
+ AddUInt(&Buffer, DW_AT_APPLE_runtime_class, DW_FORM_data1, RLang);
}
break;
default:
@@ -2800,6 +2803,9 @@
const std::string &Flags = DIUnit.getFlags();
if (!Flags.empty())
AddString(Die, DW_AT_APPLE_flags, DW_FORM_string, Flags);
+ unsigned RVer = DIUnit.getRunTimeVersion();
+ if (RVer)
+ AddUInt(Die, DW_AT_APPLE_major_runtime_vers, DW_FORM_data1, RVer);
CompileUnit *Unit = new CompileUnit(ID, Die);
if (DIUnit.isMain()) {