GNU bug report logs - #17066
a DFA state which is built previously may be re-built in non-UTF8 locales

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#17066: closed (a DFA state which is built previously may be
 re-built in non-UTF8 locales)
Date: Wed, 02 Apr 2014 05:26:03 +0000

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Your message dated Tue, 01 Apr 2014 22:25:40 -0700
with message-id <533B9F54.3050604 <at> cs.ucla.edu>
and subject line Re: bug#17066: a DFA state which is built previously may be re-built in non-UTF8 locales
has caused the debbugs.gnu.org bug report #17066,
regarding a DFA state which is built previously may be re-built in non-UTF8 locales
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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17066: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=17066
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From: Norihiro Tanaka <noritnk <at> kcn.ne.jp>
To: submit <at> debbugs.gnu.org
Subject: a DFA state which is built previously may be re-built in non-UTF8
 locales
Date: Sat, 22 Mar 2014 15:59:11 +0900

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Package: grep

When don't pass backref parameter to dfaexec(), a DFA state which is built
previously may be re-built.

In non-UTF8 locales, when reach a state which mbps aren't empty, exit
main loop and call build_state() in dfa.c, even if the state has been
already built.

That will cause increase of processing time, and waste of a lot of
memories.

Fortunately, grep program doesn't pass the code in dfa.c unless
mblen_buf overflows, since backref parameter is specified when dfaexec()
is called with large buffer.

Norihiro

[patch.txt (text/plain, attachment)]

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Paolo Bonzini <bonzini <at> gnu.org>, Norihiro Tanaka <noritnk <at> kcn.ne.jp>, 
 17066-done <at> debbugs.gnu.org
Subject: Re: bug#17066: a DFA state which is built previously may be re-built
 in non-UTF8 locales
Date: Tue, 01 Apr 2014 22:25:40 -0700

Paolo Bonzini wrote:
> Thanks, I'll apply this patch.

Thanks, closing this bug report as done.

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