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Re: [PATCH v4 05/19] grep: remove redundant `regflags &= ~REG_EXTENDED` assignments

From
Junio C Hamano <gitster@pobox.com>
Date
Apr 26, 2017, 05:29 UTC
Message-ID
<xmqqvaprrb37.fsf@gitster.mtv.corp.google.com>
In-Reply-To
<20170425210548.24612-6-avarab@gmail.com>
Ævar Arnfjörð Bjarmason  <avarab@gmail.com> writes:
Show 8 quoted lines
> @@ -417,7 +415,6 @@ static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt)
>  	int regflags;
>  
>  	basic_regex_quote_buf(&sb, p->pattern);
> -	regflags = opt->regflags & ~REG_EXTENDED;
>  	if (opt->ignore_case)
>  		regflags |= REG_ICASE;
>  	err = regcomp(&p->regexp, sb.buf, regflags);

This hunk is wrong. Now the use of regflags we see in the post context is mixing ICASE bit into an uninitialized garbage on the stack.

Previous: Junio C HamanoNext: Ævar Arnfjörð Bjarmason
Message 8 of 24 in “PCRE v1 improvements & PCRE v2 support”
  1. 00/19 PCRE v1 improvements & PCRE v2 supportÆvar Arnfjörð Bjarmason, Apr 25, 2017
  2. 01/19 grep: amend submodule recursion test in preparation for rx engine testingÆvar Arnfjörð Bjarmason, Apr 25, 2017
  3. 02/19 grep: add tests for grep pattern types being passed to submodulesÆvar Arnfjörð Bjarmason, Apr 25, 2017
  4. 03/19 grep: submodule-related case statements should die if new fields are addedÆvar Arnfjörð Bjarmason, Apr 25, 2017
  5. 04/19 grep: remove redundant regflags assignment under PCREÆvar Arnfjörð Bjarmason, Apr 25, 2017
  6. 05/19 grep: remove redundant `regflags &= ~REG_EXTENDED` assignmentsÆvar Arnfjörð Bjarmason, Apr 25, 2017
  7. Junio C HamanoApr 26, 2017
  8. Junio C HamanoApr 26, 2017
  9. 05/19 grep: remove redundant `regflags &= ~REG_EXTENDED` assignmentsÆvar Arnfjörð Bjarmason, Apr 26, 2017
  10. Junio C HamanoApr 27, 2017
  11. 06/19 Makefile & configure: reword outdated comment about PCREÆvar Arnfjörð Bjarmason, Apr 25, 2017
  12. 07/19 grep: add a test for backreferences in PCRE patternsÆvar Arnfjörð Bjarmason, Apr 25, 2017
  13. 09/19 log: add -P as a synonym for --perl-regexpÆvar Arnfjörð Bjarmason, Apr 25, 2017
  14. 08/19 log: add exhaustive tests for pattern style options & configÆvar Arnfjörð Bjarmason, Apr 25, 2017
  15. 10/19 grep & rev-list doc: stop promising libpcre for --perl-regexpÆvar Arnfjörð Bjarmason, Apr 25, 2017
  16. 12/19 test-lib: rename the LIBPCRE prerequisite to PCREÆvar Arnfjörð Bjarmason, Apr 25, 2017
  17. 13/19 grep: change the internal PCRE macro names to be PCRE1Ævar Arnfjörð Bjarmason, Apr 25, 2017
  18. 14/19 grep: change the internal PCRE code & header names to be PCRE1Ævar Arnfjörð Bjarmason, Apr 25, 2017
  19. 15/19 perf: add a performance comparison test of grep -E and -PÆvar Arnfjörð Bjarmason, Apr 25, 2017
  20. 11/19 grep: make grep.patternType=[pcre|pcre1] a synonym for "perl"Ævar Arnfjörð Bjarmason, Apr 25, 2017
  21. 16/19 grep: add support for the PCRE v1 JIT APIÆvar Arnfjörð Bjarmason, Apr 25, 2017
  22. 17/19 grep: add support for PCRE v2Ævar Arnfjörð Bjarmason, Apr 25, 2017
  23. 18/19 grep: remove support for concurrent use of both PCRE v1 & v2Ævar Arnfjörð Bjarmason, Apr 25, 2017
  24. 19/19 Makefile & configure: make PCRE v2 the default PCRE implementationÆvar Arnfjörð Bjarmason, Apr 25, 2017

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