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From: "vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: dwz@sourceware.org
Subject: [Bug default/27561] New: low-mem odr
Date: Thu, 11 Mar 2021 13:30:35 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27561

            Bug ID: 27561
           Summary: low-mem odr
           Product: dwz
           Version: unspecified
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: default
          Assignee: nobody at sourceware dot org
          Reporter: vries at gcc dot gnu.org
                CC: dwz at sourceware dot org
  Target Milestone: ---

Atm odr is disabled in low-mem mode, here in set_die_odr_state:
...
  if (low_mem)=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
    /* Todo: allow low-mem mode.  */=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20
    return;=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
             ...

In principle, we could enable this.

When doing the enable-and-see-what-breaks approach, we get a few easy thing=
s to
fix.  Using --devel-verify-dups also helps.  But after that, we run into ha=
rder
problems.

ISTM that enabling this only makes sense in a setup where all accesses of
struct dw_die fields after die_parent (so, the ones that are conditionally
available) can be (optionally) instrumented such that it's checked whether =
the
field is indeed available.

--=20
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