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From: "vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: dwz@sourceware.org
Subject: [Bug default/24204] [dwz, low-mem] Couldn't find DIE referenced by
 DW_OP_GNU_implicit_pointer
Date: Tue, 01 Jan 2019 00:00:00 -0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D24204

Tom de Vries <vries at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at redhat dot com

--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
AFAIU, the problem is as follows:

During the first low-mem phase in read_debug_info, we're supposed to read in
all the intercu-referenced DIES, such that they're available during the sec=
ond
phase.

But in read_debug_info, we're just skipping over the DW_FORM_exprloc that
points to the location list that contains the DW_OP_GNU_implicit_pointer
reference to the DW_TAG_dwarf_procedure DIE:
...
                case DW_FORM_exprloc:
                  len =3D read_uleb128 (ptr);
                  form =3D DW_FORM_block1;
                  break;
...

And consequently, when we try to access the DIE in checksum_die, it's not
available.

--=20
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