From: Taylor Blau <me@ttaylorr.com>
To: Jeff King <peff@peff.net>
Cc: git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>,
Derrick Stolee <derrickstolee@github.com>,
Abhradeep Chakraborty <chakrabortyabhradeep79@gmail.com>
Subject: Re: [PATCH 6/6] pack-bitmap.c: factor out `bitmap_index_seek_commit()`
Date: Tue, 21 Mar 2023 14:16:40 -0400 [thread overview]
Message-ID: <ZBn0iFE5qOJKVeel@nand.local> (raw)
In-Reply-To: <20230321181315.GH3119834@coredump.intra.peff.net>
On Tue, Mar 21, 2023 at 02:13:15PM -0400, Jeff King wrote:
> I'm not 100% sure on where these offsets come from. But it looks like
> they're coming from the bitmap lookup table. In which case a bogus value
> there should be an error(), and not a BUG(), I would think.
They do come from the lookup table, yes. I'm not sure that I agree that
bogus values here should be an error() or a BUG(), or if I even have a
strong preference between one and the other.
But I do think that trying to make it an error() makes it awkward for
all of the other callers that want it to be a BUG(), since the detail of
whether to call one or the other is private to bitmap_index_seek().
We *could* open-code it, introduce a variant of bitmap_index_seek(),
make it take an additional parameter specifying whether to call one over
the other, *or* check the bounds ourselves before even calling
bitmap_index_seek().
But none of those seem like great options to me, TBH. I would be just as
happy to leave this as a BUG(), to be honest.
Thanks,
Taylor
next prev parent reply other threads:[~2023-03-21 18:16 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-20 20:02 [PATCH 0/6] pack-bitmap: miscellaneous mmap read hardening Taylor Blau
2023-03-20 20:02 ` [PATCH 1/6] pack-bitmap.c: hide bitmap internals in `read_u8()` Taylor Blau
2023-03-21 17:35 ` Jeff King
2023-03-24 17:52 ` Derrick Stolee
2023-03-20 20:02 ` [PATCH 2/6] pack-bitmap.c: hide bitmap internals in `read_be32()` Taylor Blau
2023-03-20 20:02 ` [PATCH 3/6] pack-bitmap.c: drop unnecessary 'inline's Taylor Blau
2023-03-21 17:40 ` Jeff King
2023-03-20 20:02 ` [PATCH 4/6] pack-bitmap.c: factor out manual `map_pos` manipulation Taylor Blau
2023-03-21 17:56 ` Jeff King
2023-03-24 18:04 ` Derrick Stolee
2023-03-24 18:29 ` Jeff King
2023-03-24 23:23 ` Taylor Blau
2023-03-25 4:57 ` Jeff King
2023-03-24 23:13 ` Taylor Blau
2023-03-24 23:24 ` Taylor Blau
2023-03-24 23:08 ` Taylor Blau
2023-03-20 20:02 ` [PATCH 5/6] pack-bitmap.c: use `bitmap_index_seek()` where possible Taylor Blau
2023-03-21 18:05 ` Jeff King
2023-03-24 18:06 ` Derrick Stolee
2023-03-24 18:35 ` Jeff King
2023-03-24 19:43 ` Junio C Hamano
2023-03-24 20:37 ` Jeff King
2023-03-24 21:38 ` Junio C Hamano
2023-03-24 22:57 ` Taylor Blau
2023-03-20 20:02 ` [PATCH 6/6] pack-bitmap.c: factor out `bitmap_index_seek_commit()` Taylor Blau
2023-03-21 18:13 ` Jeff King
2023-03-21 18:16 ` Taylor Blau [this message]
2023-03-21 18:27 ` Jeff King
2023-03-24 18:09 ` Derrick Stolee
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