[PATCH 00/30] Rewrite the DWARF "partial" reader

[Tom Tromey]

>> gdb.dwarf2/fission-multi-cu still fails.

Tom> I'm getting 1000/1000 with:
Tom> ...

I looked into this, and ended up agreeing that adding a mutex is the
best way here.

I added it to lookup_dwo_unit, though.

I'm still not sure that the patch is fully correct.  I suspect it may
also need to more eagerly map the debuginfo sections coming from these
files.

Tom