view modules/fchdir @ 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 113915b59e1e
children 1f14c6dd175d
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Description:
fchdir() function: change current directory, given an open file descriptor.

Files:
lib/fchdir.c
m4/fchdir.m4

Depends-on:
unistd
chdir            [test $HAVE_FCHDIR = 0]
close            [test $HAVE_FCHDIR = 0]
dirent           [test $HAVE_FCHDIR = 0]
dirfd            [test $HAVE_FCHDIR = 0]
dosname          [test $HAVE_FCHDIR = 0]
dup2             [test $HAVE_FCHDIR = 0]
fcntl            [test $HAVE_FCHDIR = 0]
fcntl-h          [test $HAVE_FCHDIR = 0]
filenamecat-lgpl [test $HAVE_FCHDIR = 0]
fstat            [test $HAVE_FCHDIR = 0]
getcwd-lgpl      [test $HAVE_FCHDIR = 0]
malloc-posix     [test $HAVE_FCHDIR = 0]
open             [test $HAVE_FCHDIR = 0]
realloc-posix    [test $HAVE_FCHDIR = 0]
stat             [test $HAVE_FCHDIR = 0]
stdbool          [test $HAVE_FCHDIR = 0]
strdup-posix     [test $HAVE_FCHDIR = 0]
sys_stat         [test $HAVE_FCHDIR = 0]

configure.ac:
gl_FUNC_FCHDIR
gl_UNISTD_MODULE_INDICATOR([fchdir])

Makefile.am:

Include:
<unistd.h>

License:
LGPL

Maintainer:
Bruno Haible