[PATCH] D36300: WIP: DebugInfo: Use base address and offset pairs in debug_loc.dwo to reduce required relocations

[David Blaikie via llvm-commits]

On Sat, Aug 5, 2017 at 8:34 AM Tamas Berghammer via Phabricator <
reviews at reviews.llvm.org> wrote:

> tberghammer added a comment.
>
> I checked LLDB and it doesn't have support for base address entries
> neither in .debug_loc nor in .debug_loc.dwo sections and it doesn't support
> reading .debug_loclists or .debug_loclists.dwo entries either. I will try
> to add support for them but it will require some refactoring so it will
> take some time.
>

Cool - I mean, no particular rush, it seems, if GDB doesn't support it
either so we'll need a fallback to the current behavior at least.

But if the benefit of fewer relocations in split-dwarf builds (especially
optimized builds) is significant to you, this might be nice to have. (it's
a smaller win compared to the debug_ranges improvement - which I need to
come back around to (it's defaulted off behind a flag for now because
Gold's gdb_index fails with it on 32 bit builds - so maybe I'll narrow the
default-off down a little (32 bit builds targeting GDB)) & not sure if
that's been fixed in LLDB yet)


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> https://reviews.llvm.org/D36300
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