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From: Damir Shayhutdinov <damir@altlinux.org>
To: ALT Linux Team development discussions <devel@lists.altlinux.org>
Subject: Re: [devel] Добавление -Werror=format-security
Date: Wed, 3 Jun 2009 15:59:10 +0400
Message-ID: <679044850906030459k539b55c0w737fbe9cd3b713e8@mail.gmail.com> (raw)
In-Reply-To: <679044850906030452k38ec3ec7g8b7faed19104fe34@mail.gmail.com>

>> А как правильно предлагается чинить подобное? Я чинил приведением типа и/или
>> заменой *printf на puts/fputs - так можно?
>
> puts/fputs или printf("%s", str); Лучше первое.

Причем обе конструкции компилируются в один и тот же код, при -O2.

Вот, сравните:

#include <stdio.h>

int main(void)
{
        const char* p = "test!\n";
        printf("%s", p);
        puts(p);
        return 0;
}


08048390 <main>:
 8048390:       8d 4c 24 04             lea    0x4(%esp),%ecx
 8048394:       83 e4 f0                and    $0xfffffff0,%esp
 8048397:       ff 71 fc                pushl  0xfffffffc(%ecx)
 804839a:       55                      push   %ebp
 804839b:       89 e5                   mov    %esp,%ebp
 804839d:       51                      push   %ecx
 804839e:       83 ec 10                sub    $0x10,%esp
 80483a1:       68 a0 84 04 08          push   $0x80484a0
 80483a6:       e8 e9 fe ff ff          call   8048294 <puts@plt>
 80483ab:       c7 04 24 a6 84 04 08    movl   $0x80484a6,(%esp)
 80483b2:       e8 dd fe ff ff          call   8048294 <puts@plt>
 80483b7:       8b 4d fc                mov    0xfffffffc(%ebp),%ecx
 80483ba:       31 c0                   xor    %eax,%eax
 80483bc:       c9                      leave
 80483bd:       8d 61 fc                lea    0xfffffffc(%ecx),%esp
 80483c0:       c3                      ret

И там и там вызывается puts@plt.

  reply	other threads:[~2009-06-03 11:59 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-06-03  1:21 Vitaly Lipatov
2009-06-03  4:15 ` Afanasov Dmitry
2009-06-03  5:41   ` Pavel Solntsev
2009-06-03  7:45 ` Led
2009-06-03  8:28   ` Pavel Solntsev
2009-06-03 10:23     ` Michael Shigorin
2009-06-03 10:32       ` Alexey Rusakov
2009-06-03 10:54 ` Dmitry V. Levin
2009-06-03 11:20   ` Dmitry V. Levin
2009-06-03 11:35     ` Ivan A. Melnikov
2009-06-03 11:49     ` Led
2009-06-03 11:52       ` Slava Semushin
2009-06-03 11:52       ` Damir Shayhutdinov
2009-06-03 11:59         ` Damir Shayhutdinov [this message]
2009-06-03 12:07           ` Led
2009-06-03 12:10             ` Damir Shayhutdinov
2009-06-03 12:04         ` Led
2009-06-03 11:54       ` Afanasov Dmitry
2009-06-03 12:05         ` Led
2009-06-03 12:11           ` Afanasov Dmitry
2009-06-03 12:19             ` Led
2009-06-03 13:12               ` Afanasov Dmitry
2009-06-03 21:23       ` Dmitry V. Levin
2009-06-03 21:14     ` Dmitry V. Levin
2009-06-03 21:30       ` Alexey Tourbin
2009-06-03 21:36         ` Dmitry V. Levin
2009-06-03 22:05         ` Led
2009-06-03 22:45           ` Dmitry V. Levin
2009-06-04  3:13             ` Alexey Tourbin
2009-06-04 20:14               ` Alexey Rusakov
2009-06-04 20:30                 ` Led
2009-06-06 12:42                   ` [devel] [JT] icc (was: Добавление -Werror=format-security) Michael Shigorin
2009-06-06 22:12                     ` Konstantin Pavlov

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