Currently, LLVM's DWARF parser keeps Compile Units and Type Units on separate lists, basically organizing them by ELF section. This works okay for DWARF v4, because Type Units are in .debug_types (possibly in individual COMDATs) and everything else is in the .debug_info section (without COMDATs). The two lists conveniently can be templated/typed with DWARFTypeUnit and DWARFCompileUnit.
In DWARF v5, Type Units (possibly with COMDATs) are in .debug_info and there is no .debug_types section anymore. This makes the current organization of Units in the LLVM DWARF parser really kind of inconvenient. Although the parser does still need to handle DWARF v4, it doesn't have to manage the parsed Units the same way as it does now. I hope. (Probably worth mentioning that you have to read at least the header of a Unit out of .debug_info before you know what kind it is.) Also I understand Jan Kratochvil is working on making Partial Units a thing in the LLDB DWARF parser, as part of his DWZ work, and then Greg Clayton has been taking a run at introducing Type Units to the LLDB parser. With all the independent refactorings of the two parsers, we're tripping over each other and maybe not getting any closer to the dream of having a Grand Unified Parser used by both LLDB and LLVM. I don't have a design to propose. The main reason I'm sending up this particular flare right now is that I'm about to head off to EuroLLVM and if other interested parties will be there, maybe we can make some headway on this. There is the DebugInfo BoF, and "I'm here all week" if people want to scrounge a Round Table or a corner of the Hacker's Lab. Comments/proposals welcome, or look me up at EuroLLVM. Thanks, --paulr _______________________________________________ lldb-dev mailing list lldb-dev@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev
