git@vger.kernel.org mailing list mirror (one of many)
 help / color / mirror / code / Atom feed
From: Junio C Hamano <gitster@pobox.com>
To: Chris Torek <chris.torek@gmail.com>
Cc: Andrzej Hunt via GitGitGadget <gitgitgadget@gmail.com>,
	Git List <git@vger.kernel.org>, Andrzej Hunt <andrzej@ahunt.org>,
	Andrzej Hunt <ajrhunt@google.com>
Subject: Re: [PATCH 3/3] builtin/checkout--worker: memset struct to avoid MSAN complaints
Date: Fri, 11 Jun 2021 15:28:03 +0900	[thread overview]
Message-ID: <xmqq7dj0530s.fsf@gitster.g> (raw)
In-Reply-To: <CAPx1GvfF7NZD4RMWWZCfny2gQOt1GY=TUm1HxvC+kwwDsc4Rgw@mail.gmail.com> (Chris Torek's message of "Thu, 10 Jun 2021 21:43:27 -0700")

Chris Torek <chris.torek@gmail.com> writes:

> On Thu, Jun 10, 2021 at 9:49 AM Andrzej Hunt via GitGitGadget
> <gitgitgadget@gmail.com> wrote:
>> [snip] Therefore we add a
>> memset to convince MSAN that this memory is safe to read - but only
>> when building with MSAN to avoid this cost in normal usage.
>
> It does not seem likely to be that expensive, and would definitely
> be shorter without all the `#if` testing:
>
>> diff --git a/builtin/checkout--worker.c b/builtin/checkout--worker.c
>> index 289a9b8f89d0..02fa5285988f 100644
>> --- a/builtin/checkout--worker.c
>> +++ b/builtin/checkout--worker.c
>> @@ -56,6 +56,17 @@ static void report_result(struct parallel_checkout_item *pc_item)
>>         struct pc_item_result res;
>
> This could just have `= { 0 }` added.

I'd prefer that very much more than the #if testing, within which //
comments that we do not want in our codebase are enclosed.

Thanks.



  reply	other threads:[~2021-06-11  6:28 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-10 16:48 [PATCH 0/3] Fix uninitialised reads found with MSAN Andrzej Hunt via GitGitGadget
2021-06-10 16:48 ` [PATCH 1/3] bulk-checkin: make buffer reuse more obvious and safer Andrzej Hunt via GitGitGadget
2021-06-10 16:48 ` [PATCH 2/3] split-index: use oideq instead of memcmp to compare object_id's Andrzej Hunt via GitGitGadget
2021-06-10 16:48 ` [PATCH 3/3] builtin/checkout--worker: memset struct to avoid MSAN complaints Andrzej Hunt via GitGitGadget
2021-06-11  4:43   ` Chris Torek
2021-06-11  6:28     ` Junio C Hamano [this message]
2021-06-11 15:37       ` Andrzej Hunt
2021-06-14  1:04         ` Junio C Hamano
2021-06-11 17:11 ` [PATCH 0/3] Fix uninitialised reads found with MSAN Jeff King
2021-06-14 15:51 ` [PATCH v2 " Andrzej Hunt via GitGitGadget
2021-06-14 15:51   ` [PATCH v2 1/3] bulk-checkin: make buffer reuse more obvious and safer Andrzej Hunt via GitGitGadget
2021-06-14 15:51   ` [PATCH v2 2/3] split-index: use oideq instead of memcmp to compare object_id's Andrzej Hunt via GitGitGadget
2021-06-14 15:51   ` [PATCH v2 3/3] builtin/checkout--worker: zero-initialise struct to avoid MSAN complaints Andrzej Hunt via GitGitGadget
2021-06-17  9:28 ` [PATCH 0/3] Fix uninitialised reads found with MSAN Philip Oakley
2021-06-20 15:19   ` Andrzej Hunt

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: http://vger.kernel.org/majordomo-info.html

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=xmqq7dj0530s.fsf@gitster.g \
    --to=gitster@pobox.com \
    --cc=ajrhunt@google.com \
    --cc=andrzej@ahunt.org \
    --cc=chris.torek@gmail.com \
    --cc=git@vger.kernel.org \
    --cc=gitgitgadget@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox

	https://80x24.org/mirrors/git.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).