From: Jeff King <peff@peff.net>
To: Brandon Williams <bmwill@google.com>
Cc: Junio C Hamano <gitster@pobox.com>, git@vger.kernel.org
Subject: Re: What's cooking in git.git (Nov 2016, #06; Mon, 28)
Date: Wed, 30 Nov 2016 18:32:04 -0500 [thread overview]
Message-ID: <20161130233204.ihbrjwwu3yiv4ugq@sigill.intra.peff.net> (raw)
In-Reply-To: <20161130232823.GA192901@google.com>
On Wed, Nov 30, 2016 at 03:28:23PM -0800, Brandon Williams wrote:
> So I couldn't find a race condition in the code. I tracked the problem
> to grep_source_load_file which attempts to run lstat on the file so that
> it can read it into a buffer. The lstat call fails with ENOENT (which
> conveniently is skipped by the if statement which calls error_errno). So
> for some reason the file cannot be found and read into memory resulting
> in nothing being grep'ed for that particular file (since the buffer is
> NULL).
That's definitely weird. Is it possible that any of the underlying calls
from another thread are using chdir()? I think realpath() make do that
behind the scenes, and there may be others.
A full strace from a failing case would be interesting reading. In
theory we should be able to get that by running the stress script for
long enough. :)
-Peff
next prev parent reply other threads:[~2016-11-30 23:32 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-29 0:15 What's cooking in git.git (Nov 2016, #06; Mon, 28) Junio C Hamano
2016-11-29 1:05 ` Brandon Williams
2016-11-29 6:37 ` Jeff King
2016-11-29 6:51 ` Jeff King
2016-11-30 19:54 ` Brandon Williams
2016-11-30 23:28 ` Brandon Williams
2016-11-30 23:32 ` Jeff King [this message]
2016-11-30 23:40 ` Jeff King
2016-11-30 23:42 ` Brandon Williams
2016-11-30 23:46 ` Jeff King
2016-11-30 23:57 ` Brandon Williams
2016-11-30 23:59 ` Jeff King
2016-12-01 0:04 ` Jeff King
2016-12-01 0:08 ` Brandon Williams
2016-12-01 0:14 ` Stefan Beller
2016-12-01 1:14 ` Brandon Williams
2016-12-01 0:06 ` Brandon Williams
2016-12-01 0:19 ` Jeff King
2016-11-30 23:43 ` Stefan Beller
2016-12-01 7:09 ` Johannes Sixt
2016-12-01 7:19 ` Jeff King
2016-11-29 6:59 ` Jeff King
2016-11-29 18:31 ` Junio C Hamano
2016-11-29 18:37 ` Jeff King
2016-11-29 19:21 ` Stefan Beller
2016-11-29 19:26 ` Junio C Hamano
2016-11-29 19:29 ` Stefan Beller
2016-11-30 0:25 ` Stefan Beller
2016-12-01 8:30 ` bw/transport-protocol-policy Jeff King
2016-12-01 18:14 ` bw/transport-protocol-policy Brandon Williams
2016-12-01 19:20 ` bw/transport-protocol-policy Jeff King
2016-12-01 19:35 ` bw/transport-protocol-policy Brandon Williams
2016-12-01 19:46 ` bw/transport-protocol-policy Jeff King
2016-12-01 19:53 ` bw/transport-protocol-policy Brandon Williams
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