Mercurial > gnulib
view modules/fstatat @ 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 | b31a9ac52d07 |
children | 2d6db3f14060 |
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Description: fstatat() function: Return information about a file at a directory. Files: lib/fstatat.c lib/at-func.c m4/fstatat.m4 m4/lstat.m4 Depends-on: sys_stat extensions at-internal [test $HAVE_FSTATAT = 0 || test $REPLACE_FSTATAT = 1] dosname [test $HAVE_FSTATAT = 0 || test $REPLACE_FSTATAT = 1] errno [test $HAVE_FSTATAT = 0 || test $REPLACE_FSTATAT = 1] extern-inline [test $HAVE_FSTATAT = 0 || test $REPLACE_FSTATAT = 1] fchdir [test $HAVE_FSTATAT = 0 || test $REPLACE_FSTATAT = 1] fcntl-h [test $HAVE_FSTATAT = 0 || test $REPLACE_FSTATAT = 1] lstat [test $HAVE_FSTATAT = 0 || test $REPLACE_FSTATAT = 1] openat-die [test $HAVE_FSTATAT = 0 || test $REPLACE_FSTATAT = 1] openat-h [test $HAVE_FSTATAT = 0 || test $REPLACE_FSTATAT = 1] save-cwd [test $HAVE_FSTATAT = 0 || test $REPLACE_FSTATAT = 1] configure.ac: gl_FUNC_FSTATAT if test $HAVE_FSTATAT = 0 || test $REPLACE_FSTATAT = 1; then AC_LIBOBJ([fstatat]) fi gl_SYS_STAT_MODULE_INDICATOR([fstatat]) Makefile.am: Include: <sys/stat.h> License: GPL Maintainer: Jim Meyering, Eric Blake, Paul Eggert