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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/109109] [13 Regression] mariadb fails in tests on i586
 (non-LTO mode) after r13-4435-g2c089640279614e3
Date: Tue, 14 Mar 2023 09:02:20 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109109

--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Martin Li=C5=A1ka from comment #12)
> So the problem happens here:
>=20
> static
> uint32_t
> trx_undo_free_page(
>=20
>  trx_rseg_t* rseg,
>  bool in_history,
>=20
>  uint32_t hdr_page_no,
>  uint32_t page_no,
>=20
>  mtr_t* mtr,
>=20
>=20
>  dberr_t* err)
> {
>  do { if (__builtin_expect(!(ulint) (hdr_page_no !=3D page_no), (0))) {
> ut_dbg_assertion_failed("hdr_page_no !=3D page_no",
> "/home/abuild/rpmbuild/BUILD/mariadb-10.11.2/storage/innobase/trx/trx0und=
o.
> cc", 744); } } while (0);
>=20
>  buf_block_t* undo_block =3D buf_page_get_gen(page_id_t(rseg->space->id,
>             page_no),
>          0, RW_X_LATCH, nullptr,
>          10, mtr, err);
>  if (__builtin_expect(!undo_block, (0))) {
>   return 0xFFFFFFFFU;
>  }
>  buf_block_t* header_block =3D buf_page_get_gen(page_id_t(rseg->space->id,
>               hdr_page_no), <---- HERE
>            0, RW_X_LATCH, nullptr,
>            10, mtr, err);
>  if (__builtin_expect(!header_block, (0))) {
>   return 0xFFFFFFFFU;
>  }
> ...
>=20
> the function arguments are:
> #1  0x570e8874 in trx_undo_free_page (rseg=3D0x57a56c40 <trx_sys+16768>,
> in_history=3Dfalse, hdr_page_no=3D807, page_no=3D817, mtr=3D0xef4ac434,
> err=3D0xef4ac3dc) at /tmp/trxundo.ii:181925
>=20
> and the construction of:
> page_id_t(rseg->space->id, hdr_page_no)
> ends in callee (buf_page_get_gen) with the argument:
>=20
> (gdb) p page_id
> $5 =3D {m_id =3D 0}
>=20
> while in good run it should be {m_id =3D 807} !

Ok, can you please print *rseg , rseg->space[0], *mtr and *err at the start=
 of
the function, so that I can try to construct a self-contained testcase?
I assume both buf_page_get_gen return something non-NULL and it doesn't rea=
lly
matter otherwise what for the reproducer, since e.g. all the further calls =
can
be noipa handled as completely dummy or even exit (0).=