From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <sourceware-bugzilla@sourceware.org>
Received: by sourceware.org (Postfix, from userid 48)
	id 08210385C332; Thu, 29 Sep 2022 18:15:58 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 08210385C332
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org;
	s=default; t=1664475359;
	bh=Ee79YZH3rPuM8W/Er3M7vveq9K8Av0tW0Tqch/vnUaQ=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=jyvT0dPYrP19wG2FOLQEDTB60uavT3Su+ygAIAJiRs08W1AJAyegA9TuENOQzvf6t
	 fkTVHfmetOH0/GLtYuY0bRD/+7B6QxJrIBHE9ZA5A8mB0xbP8eUfMWRj42saBGBJLi
	 2C+vzcTZWZTgW2e6H5einbPwBtbZ83GODG0JUj5s=
From: "jakub at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: dwz@sourceware.org
Subject: [Bug default/29637] dzw fails with Unknown DWARF DW_OP_255
Date: Thu, 29 Sep 2022 18:15:58 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: dwz
X-Bugzilla-Component: default
X-Bugzilla-Version: unspecified
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: jakub at redhat dot com
X-Bugzilla-Status: WAITING
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: nobody at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: cc
Message-ID: <bug-29637-11298-QUBK6UTLKY@http.sourceware.org/bugzilla/>
In-Reply-To: <bug-29637-11298@http.sourceware.org/bugzilla/>
References: <bug-29637-11298@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <dwz.sourceware.org>

https://sourceware.org/bugzilla/show_bug.cgi?id=3D29637

Jakub Jelinek <jakub at redhat dot com> changed:

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

--- Comment #2 from Jakub Jelinek <jakub at redhat dot com> ---
This is while processing of
 <10><16d34>: Abbrev Number: 12 (DW_TAG_variable)
    <16d35>   DW_AT_abstract_origin: <0x63976>
    <16d39>   DW_AT_location    : 0x29d51 (location list)
    <16d3d>   DW_AT_GNU_locviews: 0x29d47
and seems even readelf -wo shows total garbage for that:
    00029d51 v000000000000001 v000000000000000 views at 00029d47 for:
             000000000000af34 000000000000b10b (DW_OP_implicit_value 16 byte
block: ff ff ff ff ff ff ff ff 30 b1 0 0 0 0 0 0 )
    00029d75 v000000000000000 v000000000000000 views at 00029d49 for:
             000000000000b161 ffffffff109e0012 ((User defined location op
0xff))
    00039d86 v000000000000000 v000000000000000 views at 00029d4b for:
             e201000000000000 e2000000000000cb ((Unknown location op 0x0))
(start > end)
    00039e63 v000000000000000 v000000000000000 views at 00029d4d for:
             d64e9f7b80910004 d686000000000000 ()
    00039e75 v000000000000000 v000000000000000 views at 00029d4f for:
             8091000400000000 0000000000009f7b () (start > end)
    00039e87 v000000000000034 v00000000000002f views at 00029d51 for:
             0000000000000000 0000cc1100000001 ()
    00039e99 v000000000000000 v000000000000000 views at 00029d54 for:
             00000000cc480000 00d64e5e00010000 ()
    00039eab v000000000000000 v000000000000000 views at 00029d56 for:
             000000d686000000 00005e0001000000 ()
    00039ebd v000000000000000 v00000000000000b views at 00029d58 for:
             0000000000000000 0000000100000000 ((Unknown location op 0x0))
    00046ae0 v000000000000031 v000000000000000 views at 00029d5a for:
             0000000000000000 0000436000000000 ()
    00046af2 v000000000000000 v000000000000000 views at 00029d5d for:
             0000000043690000 0043695500010000 ()
    00046b04 v000000000000000 v000000000000000 views at 00029d5f for:
             000000436e000000 436e560001000000 ()
    00046b16 v000000000000012 v000000000000000 views at 00029d61 for:
             0000437300000000 7355000100000000 ((Unknown location op 0x0))
    00046b6b v00000000000081e v30ffffffffffffff views at 00029d63 for:
             00000000004fe100 00004fe154000100 ()
    00046b7d v000000000000031 v000000000000000 views at 00029d6e for:
             000000004fe20000 9f5501f300040000 ()
    00046b8f <End of list>

Bet GCC emitted there DW_OP_implicit_value 16 with just 8 bytes of data aft=
er
it.
I vaguely remember fixing some issues like this, I think e.g.
https://gcc.gnu.org/PR99562 and
https://gcc.gnu.org/PR103046
Anyway, doesn't seem like a dwz bug to me.

--=20
You are receiving this mail because:
You are on the CC list for the bug.=