Mercurial > gnulib
view lib/pty-private.h @ 37246:5cfb3a67238d
regex: avoid glibc deadlock during configure
glibc has a known bug where certain corruptions of the heap can
cause malloc to default to printing a debug message that includes
a backtrace, but the act of getting the backtrace uses dlopen
which in turn calls into malloc, causing a recursive lock ending
in deadlock. Thus, when configure is probing for a known glibc
heap corruption bug, the overall configure would hang.
The solution suggested by glibc developers is to force malloc
to quit printing debug messages, which avoids recursive malloc.
* m4/regex.m4 (gl_REGEX): Avoid recursive malloc deadlock when
glibc bug 15078 in turn triggers bug 16159.
Reported by Michal Privoznik.
Signed-off-by: Eric Blake <eblake@redhat.com>
author | Eric Blake <eblake@redhat.com> |
---|---|
date | Tue, 03 Dec 2013 10:34:13 -0700 |
parents | c741bc27922a |
children | 344018b6e5d7 |
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/* Interface to the pt_chown program. Copyright (C) 1998-1999, 2009-2013 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1998. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _PTY_PRIVATE_H #define _PTY_PRIVATE_H 1 /* The group slave pseudo terminals belong to. */ #define TTY_GROUP "tty" /* The file descriptor connected to the master pseudo terminal. */ #define PTY_FILENO 3 /* Path to the helper program that implements 'grantpt' in user space. */ #define _PATH_PT_CHOWN PKGLIBEXECDIR "/pt_chown" /* Test whether given TTY is really a Unix98 pseudo terminal. */ /* #define unix98_pseudo_p(Dev) ... */ /* Exit codes for the helper program. */ enum /* failure modes */ { FAIL_EBADF = 1, FAIL_EINVAL, FAIL_EACCES, FAIL_EXEC, FAIL_ENOMEM }; #endif /* pty-private.h */