Linker : Make a map of typeinfo to vtable

[Frederick Virchanza Gotham <cauldwell.thomas@gmail.com>]

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On Fri, Jan 19, 2024 at 10:52 PM Frederick Virchanza Gotham wrote:
>
>> Or, instead of waiting until after all the vtables and typeinfo's have
been generated,
> I can populate my array as and when these things are generated (I imagine
this might
> be easier than waiting until they're all generated, but whatever works).


Am I right in thinking that I should be looking in the file "bfd/linker.c",
Line 1382, at the function "_bfd_generic_link_add_one_symbol", which you
can see here:

    https://github.com/bminor/binutils-gdb/blob/
4a2318c9858fdb1899157339f526df3d20e43cfe/bfd/linker.c#L1382

So if the linker is looking through a load of object files (.o), static
archives (.a), and shared libraries (.so), every symbol encountered will be
processed by the "add_one_symbol" function.

And so if I add a few lines to that function to detect symbols beginning
with "_ZTI", I can add these symbols to a global container for all the
vtables. Also I can detect all the type_info's too.

Am I barking up the right tree?