Mercurial > gnulib
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