[clang] [llvm] [clang][DebugInfo] Add symbol for debugger with VTable information. (PR #130255)

[Carlos Alberto Enciso via llvm-commits]

CarlosAlbertoEnciso wrote:

> > > To work out which class A this refers to would involve parsing the template parameter correctly and matching to the correct anonymous namespace. While this technically isn’t impossible
> > 
> > 
> > Are you sure about that? Anonymous types are confined to a single CU statically, but their values can definitely leak out at runtime. So if I'm stopped in a random CU and I see am object whose dynamic type is `(anonymous namespace)::X`, I don't see how one could determine which type (out of possibly many) is that vtable referring to.
> 
> @labath I will double check with our debugger team.

>From our debugger team:

"You could in theory look at the ELF File symbol for the VTable symbol to work out which CU the anonymous namespace refers to, which is why we say it’s *technically* possible. You’d have to transfer that information to the debugger during loading though which we don’t currently do."

https://github.com/llvm/llvm-project/pull/130255