GNU logs - #54194, boring messages

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Subject: bug#54194: Memory Leak on Fedora Machine
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Date: Sun, 27 Feb 2022 23:34:07 -0600
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--000000000000d0836c05d90d676d
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Hi there,

I was implementing a simplistic shell script parser for fun in C. When
profiling with valgrind with --trace-children=yes, I accidentally profiled
`grep` and noticed that there was over 110KB of memory leakage.

I am running grep v3.6 which is the most recent according to `dnf` on
Fedora Linux 35 (KDE Plasma) x86_64 with kernel 5.16.9-200

Thinking that it was because of whatever came with Fedora, I tried
compiling from source but the same memory leakage persisted.

The line that I was profiling was
cat /proc/self/status | grep nonvol > nonvoluntaryswitches.txt

Regards,
Mahyar

--000000000000d0836c05d90d676d
Content-Type: text/html; charset="UTF-8"
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<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8"><d=
iv dir=3D"ltr"><div>Hi there,</div><div><br></div><div>I was implementing a=
 simplistic shell script parser for fun in C. When profiling with valgrind =
with --trace-children=3Dyes, I accidentally profiled `grep` and noticed tha=
t there was over 110KB of memory leakage.</div><div><br></div><div>I am run=
ning grep v3.6 which is the most recent according to `dnf` on Fedora Linux =
35 (KDE Plasma) x86_64 with kernel 5.16.9-200<br></div><div><br></div><div>=
Thinking that it was because of whatever came with Fedora, I tried compilin=
g from source but the same memory leakage persisted.</div><div><br></div><d=
iv>The line that I was profiling was <br><div style=3D"color:rgb(247,241,25=
5);background-color:rgb(34,34,34);font-family:FiraCode NF,Consolas,&quot;Co=
urier New&quot;,monospace,&quot;Droid Sans Mono&quot;,&quot;monospace&quot;=
,monospace;font-weight:normal;font-size:14px;line-height:19px;white-space:p=
re"><div><span style=3D"color:rgb(247,241,255)">cat /proc/self/status </spa=
n><span style=3D"color:rgb(252,97,141)">|</span><span style=3D"color:rgb(24=
7,241,255)"> grep nonvol </span><span style=3D"color:rgb(252,97,141)">&gt;<=
/span><span style=3D"color:rgb(247,241,255)"> nonvoluntaryswitches.txt</spa=
n></div></div></div><div><br></div><div>Regards,</div><div>Mahyar<br></div>=
</div>

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Mahyar Mirrashed <mirrashm@HIDDEN>
Subject: bug#54194: Acknowledgement (Memory Leak on Fedora Machine)
Message-ID: <handler.54194.B.16460361303650.ack <at> debbugs.gnu.org>
References: <CAKpDRSUu+nfNQUGNgMwxFQB2Uuqp=7akar5bcXosR3JR_YOVjA@HIDDEN>
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Reply-To: 54194 <at> debbugs.gnu.org
Date: Mon, 28 Feb 2022 08:16:07 +0000

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54194: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D54194
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Message sent to bug-grep@HIDDEN:

Subject: bug#54194: Memory Leak on Fedora Machine
Resent-From: Paul Eggert <eggert@HIDDEN>
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On 2/27/22 21:34, Mahyar Mirrashed wrote:
> I accidentally profiled
> `grep` and noticed that there was over 110KB of memory leakage.

There's a good possibility that it's not a true memory leakage. grep 
doesn't bother freeing storage just before it exits, merely to pacify 
memory checkers, as it's faster to simply exit. To find out for sure 
you'll need to investigate further.

Message received at control <at> debbugs.gnu.org:

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tags 54194 moreinfo

Last modified: Mon, 28 Feb 2022 17:45:01 UTC

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