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From: Lars Schneider <larsxschneider@gmail.com>
To: Martin Ågren <martin.agren@gmail.com>
Cc: Git Users <git@vger.kernel.org>, Jeff King <peff@peff.net>
Subject: Re: [PATCH] pkt-line: re-'static'-ify buffer in packet_write_fmt_1()
Date: Sun, 27 Aug 2017 22:04:55 +0200
Message-ID: <179AC8FB-5991-4200-9AAC-2F8D0914D5F9@gmail.com> (raw)
In-Reply-To: <CAN0heSraJFbbog7FKpAtmob9W6_5-AS1StZFVW6xUwMDWfMYgg@mail.gmail.com>


> On 27 Aug 2017, at 21:09, Martin Ågren <martin.agren@gmail.com> wrote:
> 
> On 27 August 2017 at 20:21, Lars Schneider <larsxschneider@gmail.com> wrote:
>> 
>>> On 27 Aug 2017, at 09:37, Martin Ågren <martin.agren@gmail.com> wrote:
>>> 
>>> The static-ness was silently dropped in commit 70428d1a5 ("pkt-line: add
>>> packet_write_fmt_gently()", 2016-10-16). As a result, for each call to
>>> packet_write_fmt_1, we allocate and leak a buffer.
>> 
>> Oh :-( Thanks for detecting and fixing the leak.
>> 
>> How did you actually find it? Reading the code or did you use some
>> tool?
> 
> Valgrind found it for me. Most leaks it reports are "ok" since we're
> about to exit, it just takes more or less effort to realize that...

I am sorry if I am bugging you here, but I would really like to 
understand how you found it.

I did run all tests under valgrind using "make valgrind" and I found
the following files with potential issues:

cat valgrind.out | perl -nE 'say /^==.+\((.+)\:.+\)$/' | sort | uniq -c
7102
   2 clone.c
  33 common-main.c
   6 connect.c
  64 git.c
   4 ls-remote.c
 126 run-command.c
  12 transport.c
   7 worktree.c


No mention of "pkt-line.c". Did you run Git with valgrind on one of 
your repositories to find it?

Thanks,
Lars

  parent reply index

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-27  7:37 Martin Ågren
2017-08-27 15:41 ` Jeff King
2017-08-27 18:25   ` Jeff King
2017-08-27 18:21 ` Lars Schneider
2017-08-27 19:09   ` Martin Ågren
2017-08-27 19:15     ` Jeff King
2017-08-27 20:04     ` Lars Schneider [this message]
2017-08-27 23:23       ` Jeff King
2017-08-28  4:11         ` Martin Ågren
2017-08-28 17:52           ` Stefan Beller
2017-08-28 17:58             ` Jeff King
2017-09-05 10:03               ` Junio C Hamano
2017-08-29 17:51           ` Lars Schneider
2017-08-29 18:53             ` Jeff King
2017-08-29 18:58               ` [PATCH] config: use a static lock_file struct Jeff King
2017-08-29 19:09                 ` Brandon Williams
2017-08-29 19:10                   ` Brandon Williams
2017-08-29 19:12                   ` Jeff King
2017-08-30  3:25                     ` Michael Haggerty
2017-08-30  4:31                       ` Jeff King
2017-08-30  4:55                         ` Michael Haggerty
2017-08-30  4:55                         ` Jeff King
2017-08-30  5:55                           ` Jeff King
2017-08-30  7:07                             ` Michael Haggerty
2017-09-02  8:44                               ` Jeff King
2017-09-02 13:50                                 ` Jeff King
2017-08-30  6:55                           ` Michael Haggerty
2017-08-30 19:53                             ` Jeff King
2017-08-30 19:57                               ` Brandon Williams
2017-08-30 20:11                                 ` Jeff King
2017-08-30 21:06                                   ` Brandon Williams
2017-08-31  4:09                                     ` Jeff King
2017-09-06  3:59                 ` Junio C Hamano
2017-09-06 12:41                   ` Jeff King
2017-08-29 19:22               ` [PATCH] pkt-line: re-'static'-ify buffer in packet_write_fmt_1() Martin Ågren
2017-08-29 21:48                 ` Jeff King
2017-08-30  5:31                   ` Jeff King
2017-09-05 10:03                     ` Junio C Hamano
2017-10-10  4:06                       ` [PATCH 0/2] Do not call cmd_*() as a subroutine Junio C Hamano
2017-10-10  4:06                         ` [PATCH 1/2] describe: do not use " Junio C Hamano
2017-10-10  4:06                         ` [PATCH 2/2] merge-ours: " Junio C Hamano

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