* [Bug default/29637] New: dzw fails with Unknown DWARF DW_OP_255
@ 2022-09-29 8:33 nolange79 at gmail dot com
2022-09-29 11:27 ` [Bug default/29637] " mliska at suse dot cz
2022-09-29 18:15 ` jakub at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: nolange79 at gmail dot com @ 2022-09-29 8:33 UTC (permalink / raw)
To: dwz
https://sourceware.org/bugzilla/show_bug.cgi?id=29637
Bug ID: 29637
Summary: dzw fails with Unknown DWARF DW_OP_255
Product: dwz
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: default
Assignee: nobody at sourceware dot org
Reporter: nolange79 at gmail dot com
CC: dwz at sourceware dot org
Target Milestone: ---
Created attachment 14370
--> https://sourceware.org/bugzilla/attachment.cgi?id=14370&action=edit
binary reproduzing the bug
dwz fails to process the attached file with 'Unknown DWARF DW_OP_255'
dwz version 0.14
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^ permalink raw reply [flat|nested] 3+ messages in thread* [Bug default/29637] dzw fails with Unknown DWARF DW_OP_255
2022-09-29 8:33 [Bug default/29637] New: dzw fails with Unknown DWARF DW_OP_255 nolange79 at gmail dot com
@ 2022-09-29 11:27 ` mliska at suse dot cz
2022-09-29 18:15 ` jakub at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: mliska at suse dot cz @ 2022-09-29 11:27 UTC (permalink / raw)
To: dwz
https://sourceware.org/bugzilla/show_bug.cgi?id=29637
Martin Liska <mliska at suse dot cz> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mliska at suse dot cz
Status|UNCONFIRMED |WAITING
Ever confirmed|0 |1
Last reconfirmed| |2022-09-29
--- Comment #1 from Martin Liska <mliska at suse dot cz> ---
Confirmed. How did you build the library, can you please share build log?
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^ permalink raw reply [flat|nested] 3+ messages in thread* [Bug default/29637] dzw fails with Unknown DWARF DW_OP_255
2022-09-29 8:33 [Bug default/29637] New: dzw fails with Unknown DWARF DW_OP_255 nolange79 at gmail dot com
2022-09-29 11:27 ` [Bug default/29637] " mliska at suse dot cz
@ 2022-09-29 18:15 ` jakub at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: jakub at redhat dot com @ 2022-09-29 18:15 UTC (permalink / raw)
To: dwz
https://sourceware.org/bugzilla/show_bug.cgi?id=29637
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 after
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.
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2022-09-29 8:33 [Bug default/29637] New: dzw fails with Unknown DWARF DW_OP_255 nolange79 at gmail dot com
2022-09-29 11:27 ` [Bug default/29637] " mliska at suse dot cz
2022-09-29 18:15 ` jakub at redhat dot com
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