Sergey! Thanks for the additional updates and for the explanation!
(The patch LGTM, as it was stated earlier.)
--
Best regards,
Evgeniy Temirgaleev

> 
> From: Sergey Kaplun <skaplun@tarantool.org>
> To: Evgeniy Temirgaleev <e.temirgaleev@tarantool.org>
> Cc: tarantool-patches@dev.tarantool.org, Sergey Bronnikov <sergeyb@tarantool.org
> >
> Date: Tuesday, June 30, 2026 5:04 PM +03:00
> Evgeniy,
> 
> On 30.06.26, Evgeniy Temirgaleev wrote:
> > Sergey, thanks for the answer!
> >
> > > I'm not sure that ctype_preplit -> dump_ctype_preplit helps for find
> the
> > > original logic for this dumper from the LuaJIT source code. So, I'm
> open
> > > to ideas ;).
> >
> > I think, we can use original names from LuaJIT(ctype_prelit for
> ctype_prelit) and differ names for routines which are not present in
> LuaJIT. No more ideas at a time :)
> >
> > I can’t find cdata_val_int64 or cdata_val_complex in LuaJIT code,
> ‘dump_’ prefix missed?
> 
> They are partially inspired by __tostring metamethod for FFI.
> Added the prefix as you suggested:
> 
> ===================================================================
> diff --git a/src/luajit_dbg.py b/src/luajit_dbg.py
> index 28cbe97d..19cefaed 100644
> --- a/src/luajit_dbg.py
> +++ b/src/luajit_dbg.py
> @@ -2081,9 +2081,9 @@ def dump_lj_gco_cdata(gcobj):
> size = ctype['size']
> value = ''
> if ctype_iscomplex(info):
> - value = cdata_val_complex(cdata, ctype)
> + value = dump_cdata_val_complex(cdata, ctype)
> elif size == 8 and ctype_isinteger(info):
> - value = cdata_val_int64(cdata, ctype)
> + value = dump_cdata_val_int64(cdata, ctype)
> else:
> value = cdataptr(cdata)
> if ctype_isptr(info):
> @@ -2425,7 +2425,7 @@ def dump_func(func):
> # FFI dumpers.
> 
> 
> -def cdata_val_int64(cdata, ctype):
> +def dump_cdata_val_int64(cdata, ctype):
> info = ctype['info']
> isunsigned = info & CTF_UNSIGNED
> cdataval = cdataptr(cdata)
> @@ -2439,7 +2439,7 @@ def cdata_val_int64(cdata, ctype):
> return str(valueptr[0]) + usuffix + 'LL'
> 
> 
> -def cdata_val_complex(cdata, ctype):
> +def dump_cdata_val_complex(cdata, ctype):
> size = ctype['size']
> cdataval = cdataptr(cdata)
> casttype = None
> ===================================================================
> 
> Branch is force-pushed.
> 
> >
> > --
> > Best regards,
> > Evgeniy Temirgaleev
> >
> > >
> > > From: Sergey Kaplun <skaplun@tarantool.org>
> > > To: Evgeniy Temirgaleev <e.temirgaleev@tarantool.org>
> > > Cc: tarantool-patches@dev.tarantool.org, Sergey Bronnikov <sergeyb@tarantool.org
> 
> > > >
> > > Date: Tuesday, June 30, 2026 3:27 PM +03:00
> > > Evgeniy,
> > > Thanks for the answer, see my thoughts below.
> > >
> > > On 30.06.26, Evgeniy Temirgaleev wrote:
> 
> <snipped>
> 
> > > --
> > > Best regards,
> > > Sergey Kaplun
> > >
> 
> --
> Best regards,
> Sergey Kaplun
>