[Lldb-commits] [PATCH] D122988: [BOLT][DWARF] Add version 5 split dwarf support

David Blaikie via Phabricator via lldb-commits lldb-commits at lists.llvm.org
Thu Apr 28 16:30:21 PDT 2022

dblaikie added inline comments.

Comment at: bolt/include/bolt/Core/DebugData.h:375-377
+    if (Optional<uint64_t> DWOId = Unit.getDWOId())
+      return *DWOId;
+    return Unit.getOffset();
ayermolo wrote:
> ayermolo wrote:
> > dblaikie wrote:
> > > That seems like a somewhat problematic API - returning two very different kinds of data (the DWO_ID or the unit offset) seems quite easy to misuse this?
> > The idea I had behind this APIS is for it to return unique ID representing the CU. As it applies to .debug_addr. For monolithic case is its offset with .debug_info for Split Dwarf case is its DWO ID. At least in my head viewed in that context the return data is the same. It's just something that uniquely identifies this CU, and logic is encapsulated in it.
> > 
> @dblaikie What do you think?
Could you use the offset consistently? The debug_addr section is always in the executable - the offset of the skeleton CU would be unique?

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