git/t/t7812-grep-icase-non-ascii.sh
Ævar Arnfjörð Bjarmason 95ca1f987e grep/pcre2: better support invalid UTF-8 haystacks
Improve the support for invalid UTF-8 haystacks given a non-ASCII
needle when using the PCREv2 backend.

This is a more complete fix for a bug I started to fix in
870eea8166 (grep: do not enter PCRE2_UTF mode on fixed matching,
2019-07-26), now that PCREv2 has the PCRE2_MATCH_INVALID_UTF mode we
can make use of it.

This fixes the sort of case described in 8a5999838e (grep: stess test
PCRE v2 on invalid UTF-8 data, 2019-07-26), i.e.:

    - The subject string is non-ASCII (e.g. "ævar")
    - We're under a is_utf8_locale(), e.g. "en_US.UTF-8", not "C"
    - We are using --ignore-case, or we're a non-fixed pattern

If those conditions were satisfied and we matched found non-valid
UTF-8 data PCREv2 might bark on it, in practice this only happened
under the JIT backend (turned on by default on most platforms).

Ultimately this fixes a "regression" in b65abcafc7 ("grep: use PCRE v2
for optimized fixed-string search", 2019-07-01), I'm putting that in
scare-quotes because before then we wouldn't properly support these
complex case-folding, locale etc. cases either, it just broke in
different ways.

There was a bug related to this the PCRE2_NO_START_OPTIMIZE flag fixed
in PCREv2 10.36. It can be worked around by setting the
PCRE2_NO_START_OPTIMIZE flag. Let's do that in those cases, and add
tests for the bug.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-01-24 16:09:17 -08:00

127 lines
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#!/bin/sh
test_description='grep icase on non-English locales'
. ./lib-gettext.sh
test_expect_success GETTEXT_LOCALE 'setup' '
test_write_lines "TILRAUN: Halló Heimur!" >file &&
git add file &&
LC_ALL="$is_IS_locale" &&
export LC_ALL
'
test_have_prereq GETTEXT_LOCALE &&
test-tool regex "HALLÓ" "Halló" ICASE &&
test_set_prereq REGEX_LOCALE
test_expect_success REGEX_LOCALE 'grep literal string, no -F' '
git grep -i "TILRAUN: Halló Heimur!" &&
git grep -i "TILRAUN: HALLÓ HEIMUR!"
'
test_expect_success GETTEXT_LOCALE,PCRE 'grep pcre utf-8 icase' '
git grep --perl-regexp "TILRAUN: H.lló Heimur!" &&
git grep --perl-regexp -i "TILRAUN: H.lló Heimur!" &&
git grep --perl-regexp -i "TILRAUN: H.LLÓ HEIMUR!"
'
test_expect_success GETTEXT_LOCALE,PCRE 'grep pcre utf-8 string with "+"' '
test_write_lines "TILRAUN: Hallóó Heimur!" >file2 &&
git add file2 &&
git grep -l --perl-regexp "TILRAUN: H.lló+ Heimur!" >actual &&
echo file >expected &&
echo file2 >>expected &&
test_cmp expected actual
'
test_expect_success REGEX_LOCALE 'grep literal string, with -F' '
git grep -i -F "TILRAUN: Halló Heimur!" &&
git grep -i -F "TILRAUN: HALLÓ HEIMUR!"
'
test_expect_success REGEX_LOCALE 'grep string with regex, with -F' '
test_write_lines "TILRAUN: Halló Heimur [abc]!" >file3 &&
git add file3 &&
git grep -i -F "TILRAUN: Halló Heimur [abc]!" file3
'
test_expect_success REGEX_LOCALE 'pickaxe -i on non-ascii' '
git commit -m first &&
git log --format=%f -i -S"TILRAUN: HALLÓ HEIMUR!" >actual &&
echo first >expected &&
test_cmp expected actual
'
test_expect_success GETTEXT_LOCALE,LIBPCRE2 'PCRE v2: setup invalid UTF-8 data' '
printf "\\200\\n" >invalid-0x80 &&
echo "ævar" >expected &&
cat expected >>invalid-0x80 &&
git add invalid-0x80 &&
# Test for PCRE2_MATCH_INVALID_UTF bug
# https://bugs.exim.org/show_bug.cgi?id=2642
printf "\\345Aæ\\n" >invalid-0xe5 &&
git add invalid-0xe5
'
test_expect_success GETTEXT_LOCALE,LIBPCRE2 'PCRE v2: grep ASCII from invalid UTF-8 data' '
git grep -h "var" invalid-0x80 >actual &&
test_cmp expected actual &&
git grep -h "(*NO_JIT)var" invalid-0x80 >actual &&
test_cmp expected actual
'
test_expect_success GETTEXT_LOCALE,LIBPCRE2 'PCRE v2: grep ASCII from invalid UTF-8 data (PCRE2 bug #2642)' '
git grep -h "Aæ" invalid-0xe5 >actual &&
test_cmp invalid-0xe5 actual &&
git grep -h "(*NO_JIT)Aæ" invalid-0xe5 >actual &&
test_cmp invalid-0xe5 actual
'
test_expect_success GETTEXT_LOCALE,LIBPCRE2 'PCRE v2: grep non-ASCII from invalid UTF-8 data' '
git grep -h "æ" invalid-0x80 >actual &&
test_cmp expected actual &&
git grep -h "(*NO_JIT)æ" invalid-0x80 >actual &&
test_cmp expected actual
'
test_expect_success GETTEXT_LOCALE,LIBPCRE2 'PCRE v2: grep non-ASCII from invalid UTF-8 data (PCRE2 bug #2642)' '
git grep -h "Aæ" invalid-0xe5 >actual &&
test_cmp invalid-0xe5 actual &&
git grep -h "(*NO_JIT)Aæ" invalid-0xe5 >actual &&
test_cmp invalid-0xe5 actual
'
test_lazy_prereq PCRE2_MATCH_INVALID_UTF '
test-tool pcre2-config has-PCRE2_MATCH_INVALID_UTF
'
test_expect_success GETTEXT_LOCALE,LIBPCRE2 'PCRE v2: grep non-ASCII from invalid UTF-8 data with -i' '
test_might_fail git grep -hi "Æ" invalid-0x80 >actual &&
test_might_fail git grep -hi "(*NO_JIT)Æ" invalid-0x80 >actual
'
test_expect_success GETTEXT_LOCALE,LIBPCRE2,PCRE2_MATCH_INVALID_UTF 'PCRE v2: grep non-ASCII from invalid UTF-8 data with -i' '
git grep -hi "Æ" invalid-0x80 >actual &&
test_cmp expected actual &&
git grep -hi "(*NO_JIT)Æ" invalid-0x80 >actual &&
test_cmp expected actual
'
test_expect_success GETTEXT_LOCALE,LIBPCRE2,PCRE2_MATCH_INVALID_UTF 'PCRE v2: grep non-ASCII from invalid UTF-8 data with -i (PCRE2 bug #2642)' '
git grep -hi "Æ" invalid-0xe5 >actual &&
test_cmp invalid-0xe5 actual &&
git grep -hi "(*NO_JIT)Æ" invalid-0xe5 >actual &&
test_cmp invalid-0xe5 actual &&
# Only the case of grepping the ASCII part in a way that
# relies on -i fails
git grep -hi "aÆ" invalid-0xe5 >actual &&
test_cmp invalid-0xe5 actual &&
git grep -hi "(*NO_JIT)aÆ" invalid-0xe5 >actual &&
test_cmp invalid-0xe5 actual
'
test_done