From: Junio C Hamano <gitster@pobox.com>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: git@vger.kernel.org, "Jeff King" <peff@peff.net>,
"Johannes Schindelin" <johannes.schindelin@gmx.de>,
"Carlo Marcelo Arenas Belón" <carenas@gmail.com>
Subject: Re: [PATCH v2 16/22] pickaxe -S: support content with NULs under --pickaxe-regex
Date: Tue, 30 Mar 2021 16:54:36 -0700 [thread overview]
Message-ID: <xmqqim589ozn.fsf@gitster.g> (raw)
In-Reply-To: <20210216115801.4773-17-avarab@gmail.com> ("Ævar Arnfjörð Bjarmason"'s message of "Tue, 16 Feb 2021 12:57:55 +0100")
Ævar Arnfjörð Bjarmason <avarab@gmail.com> writes:
> Fix a bug in the matching routine powering -S<rx> --pickaxe-regex so
> that we won't abort early on content that has NULs in it.
>
> We've had a hard requirement on REG_STARTEND since 2f8952250a8 (regex:
> add regexec_buf() that can work on a non NUL-terminated string,
> 2016-09-21), but this sanity check dates back to d01d8c67828 (Support
> for pickaxe matching regular expressions, 2006-03-29).
>
> It wasn't needed anymore, and as the now-passing test shows, actively
> getting in our way.
>
> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
> ---
> diffcore-pickaxe.c | 4 ++--
> t/t4209-log-pickaxe.sh | 8 ++++++++
> 2 files changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/diffcore-pickaxe.c b/diffcore-pickaxe.c
> index dd1b5c72332..0bf50a2f595 100644
> --- a/diffcore-pickaxe.c
> +++ b/diffcore-pickaxe.c
> @@ -78,12 +78,12 @@ static unsigned int contains(mmfile_t *mf, regex_t *regexp, kwset_t kws)
> regmatch_t regmatch;
> int flags = 0;
>
> - while (sz && *data &&
> + while (sz &&
> !regexec_buf(regexp, data, sz, 1, ®match, flags)) {
> flags |= REG_NOTBOL;
> data += regmatch.rm_eo;
> sz -= regmatch.rm_eo;
> - if (sz && *data && regmatch.rm_so == regmatch.rm_eo) {
> + if (sz && regmatch.rm_so == regmatch.rm_eo) {
OK. As we always require start-end support, we do not need to stop
at NULs, and we shouldn't if we are dealing with a haystack with NUL
in it. The needle may be behind that NUL.
Makes sense.
> data++;
> sz--;
> }
> diff --git a/t/t4209-log-pickaxe.sh b/t/t4209-log-pickaxe.sh
> index 4b65b89e7a5..6ea1f02d142 100755
> --- a/t/t4209-log-pickaxe.sh
> +++ b/t/t4209-log-pickaxe.sh
> @@ -201,4 +201,12 @@ test_expect_success 'log -S looks into binary files' '
> test_cmp log full-log
> '
>
> +test_expect_success 'log -S --pickaxe-regex looks into binary files' '
> + git -C GS-bin-txt log --pickaxe-regex -Sa >log &&
> + test_cmp log full-log &&
> +
> + git -C GS-bin-txt log --pickaxe-regex -S[a] >log &&
Please quote this so that readers do not have to look around to see
if there _could_ have been a file with such a name that matches the
[glob] to cause the needle not passed literally to us.
> + test_cmp log full-log
> +'
> +
> test_done
next prev parent reply other threads:[~2021-03-30 23:55 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-03 3:27 [PATCH 00/25] grep: PCREv2 fixes, remove kwset.[ch] Ævar Arnfjörð Bjarmason
2021-02-03 3:27 ` [PATCH 01/25] grep/pcre2 tests: reword comments referring to kwset Ævar Arnfjörð Bjarmason
2021-02-03 3:27 ` [PATCH 02/25] grep/pcre2: drop needless assignment + assert() on opt->pcre2 Ævar Arnfjörð Bjarmason
2021-02-03 3:27 ` [PATCH 03/25] grep/pcre2: drop needless assignment to NULL Ævar Arnfjörð Bjarmason
2021-02-03 3:27 ` [PATCH 04/25] grep/pcre2: correct reference to grep_init() in comment Ævar Arnfjörð Bjarmason
2021-02-03 3:27 ` [PATCH 05/25] grep/pcre2: prepare to add debugging to pcre2_malloc() Ævar Arnfjörð Bjarmason
2021-02-03 3:27 ` [PATCH 06/25] grep/pcre2: add GREP_PCRE2_DEBUG_MALLOC debug mode Ævar Arnfjörð Bjarmason
2021-02-03 3:27 ` [PATCH 07/25] grep/pcre2: use compile-time PCREv2 version test Ævar Arnfjörð Bjarmason
2021-02-03 3:27 ` [PATCH 08/25] grep/pcre2: use pcre2_maketables_free() function Ævar Arnfjörð Bjarmason
2021-02-03 3:27 ` [PATCH 09/25] grep/pcre2: actually make pcre2 use custom allocator Ævar Arnfjörð Bjarmason
2021-02-03 3:27 ` [PATCH 10/25] grep/pcre2: move back to thread-only PCREv2 structures Ævar Arnfjörð Bjarmason
2021-02-03 3:27 ` [PATCH 11/25] grep/pcre2: move definitions of pcre2_{malloc,free} Ævar Arnfjörð Bjarmason
2021-02-03 3:27 ` [PATCH 12/25] pickaxe tests: refactor to use test_commit --append Ævar Arnfjörð Bjarmason
2021-02-03 3:27 ` [PATCH 13/25] pickaxe -S: support content with NULs under --pickaxe-regex Ævar Arnfjörð Bjarmason
2021-02-03 3:28 ` [PATCH 14/25] pickaxe -S: remove redundant "sz" check in while-loop Ævar Arnfjörð Bjarmason
2021-02-04 16:16 ` René Scharfe
2021-02-04 17:56 ` Junio C Hamano
2021-02-04 21:13 ` Ævar Arnfjörð Bjarmason
2021-02-03 3:28 ` [PATCH 15/25] pickaxe/style: consolidate declarations and assignments Ævar Arnfjörð Bjarmason
2021-02-03 3:28 ` [PATCH 16/25] pickaxe tests: add test for diffgrep_consume() internals Ævar Arnfjörð Bjarmason
2021-02-03 3:28 ` [PATCH 17/25] pickaxe tests: add test for "log -S" not being a regex Ævar Arnfjörð Bjarmason
2021-02-03 3:28 ` [PATCH 18/25] perf: add performance test for pickaxe Ævar Arnfjörð Bjarmason
2021-02-03 3:28 ` [PATCH 19/25] pickaxe -G: set -U0 for diff generation Ævar Arnfjörð Bjarmason
2021-02-03 14:26 ` Ævar Arnfjörð Bjarmason
2021-02-03 19:42 ` Junio C Hamano
2021-02-03 3:28 ` [PATCH 20/25] grep.h: make patmatch() a public function Ævar Arnfjörð Bjarmason
2021-02-03 3:28 ` [PATCH 21/25] pickaxe: use PCREv2 for -G and -S Ævar Arnfjörð Bjarmason
2021-02-03 20:44 ` Ævar Arnfjörð Bjarmason
2021-02-04 18:11 ` Junio C Hamano
2021-02-04 18:22 ` Junio C Hamano
2021-02-03 3:28 ` [PATCH 22/25] Remove unused kwset.[ch] Ævar Arnfjörð Bjarmason
[not found] ` <CAPUEspgBmuTBHVZWY9fRtjbHWBRr0zHravLL1Czepc6jmib4HA@mail.gmail.com>
2021-02-03 14:13 ` Ævar Arnfjörð Bjarmason
[not found] ` <CAPUEsphN7QuSVsC1Tr4xE8yQgPTtpF7wL7zbk1crQU3n-5g6JQ@mail.gmail.com>
2021-02-03 16:45 ` Ævar Arnfjörð Bjarmason
2021-02-03 3:28 ` [PATCH 23/25] xdiff-interface: allow early return from xdiff_emit_{line,hunk}_fn Ævar Arnfjörð Bjarmason
2021-02-03 3:28 ` [PATCH 24/25] xdiff-interface: support early exit in xdiff_outf() Ævar Arnfjörð Bjarmason
2021-02-04 18:16 ` Junio C Hamano
2021-02-03 3:28 ` [PATCH 25/25] pickaxe -G: terminate early on matching lines Ævar Arnfjörð Bjarmason
2021-02-03 12:38 ` [PATCH 00/25] grep: PCREv2 fixes, remove kwset.[ch] Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 00/22] pickaxe: test and refactoring for follow-up changes Ævar Arnfjörð Bjarmason
2021-02-16 22:23 ` Junio C Hamano
2021-02-17 1:19 ` Junio C Hamano
2021-04-12 17:15 ` [PATCH v3 00/22] pickaxe: test and refactoring for future PCRE backend Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 01/22] grep/pcre2 tests: reword comments referring to kwset Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 02/22] pickaxe tests: refactor to use test_commit --append --printf Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 03/22] pickaxe tests: add test for diffgrep_consume() internals Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 04/22] pickaxe tests: add test for "log -S" not being a regex Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 05/22] pickaxe tests: test for -G, -S and --find-object incompatibility Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 06/22] pickaxe tests: add missing test for --no-pickaxe-regex being an error Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 07/22] pickaxe: die when -G and --pickaxe-regex are combined Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 08/22] pickaxe: die when --find-object and --pickaxe-all " Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 09/22] diff.h: move pickaxe fields together again Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 10/22] pickaxe/style: consolidate declarations and assignments Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 11/22] perf: add performance test for pickaxe Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 12/22] pickaxe: refactor function selection in diffcore-pickaxe() Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 13/22] pickaxe: assert that we must have a needle under -G or -S Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 14/22] pickaxe -S: support content with NULs under --pickaxe-regex Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 15/22] pickaxe: rename variables in has_changes() for brevity Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 16/22] pickaxe -S: slightly optimize contains() Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 17/22] xdiff-interface: prepare for allowing early return Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 18/22] xdiff-interface: allow early return from xdiff_emit_line_fn Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 19/22] pickaxe -G: terminate early on matching lines Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 20/22] pickaxe -G: don't special-case create/delete Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 21/22] xdiff users: use designated initializers for out_line Ævar Arnfjörð Bjarmason
2021-04-12 17:15 ` [PATCH v3 22/22] xdiff-interface: replace discard_hunk_line() with a flag Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 01/22] grep/pcre2 tests: reword comments referring to kwset Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 02/22] test-lib-functions: document and test test_commit --no-tag Ævar Arnfjörð Bjarmason
2021-03-30 23:14 ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 03/22] test-lib-functions: reword "test_commit --append" docs Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 04/22] test-lib functions: add --printf option to test_commit Ævar Arnfjörð Bjarmason
2021-03-30 23:11 ` Junio C Hamano
2021-04-12 13:19 ` Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 05/22] pickaxe tests: refactor to use test_commit --append --printf Ævar Arnfjörð Bjarmason
2021-03-30 23:26 ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 06/22] pickaxe tests: add test for diffgrep_consume() internals Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 07/22] pickaxe tests: add test for "log -S" not being a regex Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 08/22] pickaxe tests: test for -G, -S and --find-object incompatibility Ævar Arnfjörð Bjarmason
2021-03-30 23:32 ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 09/22] pickaxe: die when -G and --pickaxe-regex are combined Ævar Arnfjörð Bjarmason
2021-03-30 23:36 ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 10/22] pickaxe: die when --find-object and --pickaxe-all " Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 11/22] diff.h: move pickaxe fields together again Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 12/22] pickaxe/style: consolidate declarations and assignments Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 13/22] perf: add performance test for pickaxe Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 14/22] pickaxe: refactor function selection in diffcore-pickaxe() Ævar Arnfjörð Bjarmason
2021-03-30 23:45 ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 15/22] pickaxe: assert that we must have a needle under -G or -S Ævar Arnfjörð Bjarmason
2021-03-30 23:50 ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 16/22] pickaxe -S: support content with NULs under --pickaxe-regex Ævar Arnfjörð Bjarmason
2021-03-30 23:54 ` Junio C Hamano [this message]
2021-02-16 11:57 ` [PATCH v2 17/22] pickaxe: rename variables in has_changes() for brevity Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 18/22] pickaxe -S: slightly optimize contains() Ævar Arnfjörð Bjarmason
2021-03-30 23:58 ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 19/22] xdiff-interface: allow early return from xdiff_emit_{line,hunk}_fn Ævar Arnfjörð Bjarmason
2021-03-31 0:04 ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 20/22] xdiff-interface: support early exit in xdiff_outf() Ævar Arnfjörð Bjarmason
2021-02-16 11:58 ` [PATCH v2 21/22] pickaxe -G: terminate early on matching lines Ævar Arnfjörð Bjarmason
2021-03-31 0:11 ` Junio C Hamano
2021-02-16 11:58 ` [PATCH v2 22/22] pickaxe -G: don't special-case create/delete Ævar Arnfjörð Bjarmason
2021-03-31 0:14 ` Junio C Hamano
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