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Re: [PATCH 1/3] sed: Fix infinite loop on some false multi-byte matches
From: |
Stanislav Brabec |
Subject: |
Re: [PATCH 1/3] sed: Fix infinite loop on some false multi-byte matches |
Date: |
Wed, 15 Feb 2012 19:57:27 +0100 |
Paolo Bonzini wrote:
> On 02/15/2012 05:29 PM, Stanislav Brabec wrote:
> > int
> > main (void)
> > {
> > struct re_pattern_buffer r;
> > struct re_registers s;
> > int e, rc = 0;
> > if (setlocale (LC_CTYPE, "ja_JP.EUC-JP") == NULL)
> > {
> > puts ("setlocale failed");
> > return 1;
> > }
> > memset (&r, 0, sizeof (r));
> > memset (&s, 0, sizeof (s));
> > re_set_syntax (RE_SYNTAX_POSIX_BASIC | RE_NO_POSIX_BACKTRACKING);
>
> One difference is that sed sets RE_NO_SUB here.
ltrace of sed in the sed testcase shows 0x1050246, which matches
RE_SYNTAX_POSIX_BASIC | RE_NO_POSIX_BACKTRACKING
I did not see RE_NO_SUB (0x2000000) set there.
> I didn't try to run the program with the change, thouhg.
I just tested it. It still does not reproduce the problem.
--
Best Regards / S pozdravem,
Stanislav Brabec
software developer
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