* [Bug tools/28725] New: eu-ar -x -N COUNT uses instance [COUNT+1] of name
@ 2021-12-25 12:19 panxh_ran at 163 dot com
2021-12-25 12:20 ` [Bug tools/28725] " panxh_ran at 163 dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: panxh_ran at 163 dot com @ 2021-12-25 12:19 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28725
Bug ID: 28725
Summary: eu-ar -x -N COUNT uses instance [COUNT+1] of name
Product: elfutils
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: tools
Assignee: unassigned at sourceware dot org
Reporter: panxh_ran at 163 dot com
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
Created attachment 13880
--> https://sourceware.org/bugzilla/attachment.cgi?id=13880&action=edit
the result of eu-ar -x -N COUNT
eu-ar -x -N COUNT should use instance [COUNT] of name,
but it uses instance [COUNT+1] of name incorrectly.
Usage: -N Use instance [COUNT] of name.
The attachments show the differences of command result between "eu-ar -x -N
COUNT"
and "ar -x -N COUNT".
do_oper_extract() in src/ar.c
Is it should be instance-- at Line522?
522 if (res != NULL && (instance < 0 || instance-- == 0)
523 && !found[(char **) res->data - argv])
524 found[(char **) res->data - argv] = do_extract = true;
525 }
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* [Bug tools/28725] eu-ar -x -N COUNT uses instance [COUNT+1] of name
2021-12-25 12:19 [Bug tools/28725] New: eu-ar -x -N COUNT uses instance [COUNT+1] of name panxh_ran at 163 dot com
@ 2021-12-25 12:20 ` panxh_ran at 163 dot com
2022-08-04 0:05 ` panxh_ran at 163 dot com
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: panxh_ran at 163 dot com @ 2021-12-25 12:20 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28725
--- Comment #1 from panxiaohe <panxh_ran at 163 dot com> ---
Created attachment 13881
--> https://sourceware.org/bugzilla/attachment.cgi?id=13881&action=edit
the result of ar -x -N COUNT
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* [Bug tools/28725] eu-ar -x -N COUNT uses instance [COUNT+1] of name
2021-12-25 12:19 [Bug tools/28725] New: eu-ar -x -N COUNT uses instance [COUNT+1] of name panxh_ran at 163 dot com
2021-12-25 12:20 ` [Bug tools/28725] " panxh_ran at 163 dot com
@ 2022-08-04 0:05 ` panxh_ran at 163 dot com
2022-08-28 15:59 ` mark at klomp dot org
2022-09-14 19:00 ` mark at klomp dot org
3 siblings, 0 replies; 5+ messages in thread
From: panxh_ran at 163 dot com @ 2022-08-04 0:05 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28725
--- Comment #2 from panxiaohe <panxh_ran at 163 dot com> ---
Please pay attention on this issue.
When using instance [COUNT] of name, the instance of check is wrong in
do_oper_extract().
instance-- should be --instance.
522 if (res != NULL && (instance < 0 || instance-- == 0)
523 && !found[(char **) res->data - argv])
524 found[(char **) res->data - argv] = do_extract = true;
525 }
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* [Bug tools/28725] eu-ar -x -N COUNT uses instance [COUNT+1] of name
2021-12-25 12:19 [Bug tools/28725] New: eu-ar -x -N COUNT uses instance [COUNT+1] of name panxh_ran at 163 dot com
2021-12-25 12:20 ` [Bug tools/28725] " panxh_ran at 163 dot com
2022-08-04 0:05 ` panxh_ran at 163 dot com
@ 2022-08-28 15:59 ` mark at klomp dot org
2022-09-14 19:00 ` mark at klomp dot org
3 siblings, 0 replies; 5+ messages in thread
From: mark at klomp dot org @ 2022-08-28 15:59 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28725
Mark Wielaard <mark at klomp dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mark at klomp dot org
Ever confirmed|0 |1
Last reconfirmed| |2022-08-28
Assignee|unassigned at sourceware dot org |mark at klomp dot org
Status|UNCONFIRMED |ASSIGNED
--- Comment #3 from Mark Wielaard <mark at klomp dot org> ---
Thanks for the report and analysis.
Next time please post output as text instead of an image.
I posted a patch that includes a testcase:
https://inbox.sourceware.org/elfutils-devel/20220828155746.99653-1-mark@klomp.org/T/#u
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* [Bug tools/28725] eu-ar -x -N COUNT uses instance [COUNT+1] of name
2021-12-25 12:19 [Bug tools/28725] New: eu-ar -x -N COUNT uses instance [COUNT+1] of name panxh_ran at 163 dot com
` (2 preceding siblings ...)
2022-08-28 15:59 ` mark at klomp dot org
@ 2022-09-14 19:00 ` mark at klomp dot org
3 siblings, 0 replies; 5+ messages in thread
From: mark at klomp dot org @ 2022-09-14 19:00 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28725
Mark Wielaard <mark at klomp dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
--- Comment #4 from Mark Wielaard <mark at klomp dot org> ---
commit 6cb01b4ef3cdd4f83d21bbcec72fa66712ac14e6
Author: Mark Wielaard <mark@klomp.org>
Date: Sun Aug 28 17:46:08 2022 +0200
ar: Correct -N COUNT off-by-one
When using instance [COUNT], the instance check is wrong.
instance-- == 0 should be --instance == 0.
Add a testcase run-ar-N.sh that uses -N COUNT with extract and delete
operations checking the right instance was extracted and deleted.
https://sourceware.org/bugzilla/show_bug.cgi?id=28725
Reported-by: panxiaohe <panxh_ran@163.com>
Signed-off-by: Mark Wielaard <mark@klomp.org>
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