Mercurial > gnulib
view lib/sys_times.in.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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/* Provide a sys/times.h header file. Copyright (C) 2008-2013 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, see <http://www.gnu.org/licenses/>. */ /* Written by Simon Josefsson <simon@josefsson.org>, 2008. */ /* This file is supposed to be used on platforms where <sys/times.h> is missing. */ #ifndef _@GUARD_PREFIX@_SYS_TIMES_H # if __GNUC__ >= 3 @PRAGMA_SYSTEM_HEADER@ # endif @PRAGMA_COLUMNS@ # if @HAVE_SYS_TIMES_H@ # @INCLUDE_NEXT@ @NEXT_SYS_TIMES_H@ # endif # define _@GUARD_PREFIX@_SYS_TIMES_H /* Get clock_t. But avoid namespace pollution on glibc systems. */ # ifndef __GLIBC__ # include <time.h> # endif /* The definition of _GL_ARG_NONNULL is copied here. */ /* The definition of _GL_WARN_ON_USE is copied here. */ # ifdef __cplusplus extern "C" { # endif # if !@HAVE_STRUCT_TMS@ # if !GNULIB_defined_struct_tms /* Structure describing CPU time used by a process and its children. */ struct tms { clock_t tms_utime; /* User CPU time. */ clock_t tms_stime; /* System CPU time. */ clock_t tms_cutime; /* User CPU time of dead children. */ clock_t tms_cstime; /* System CPU time of dead children. */ }; # define GNULIB_defined_struct_tms 1 # endif # endif # if @GNULIB_TIMES@ # if !@HAVE_TIMES@ extern clock_t times (struct tms *buffer) _GL_ARG_NONNULL ((1)); # endif # elif defined GNULIB_POSIXCHECK # undef times # if HAVE_RAW_DECL_TIMES _GL_WARN_ON_USE (times, "times is unportable - " "use gnulib module times for portability"); # endif # endif # ifdef __cplusplus } # endif #endif /* _@GUARD_PREFIX@_SYS_TIMES_H */