Mercurial > gnulib
view modules/openat @ 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 | f3bc58f169b7 |
children | 637f3a63efbd |
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Description: openat() function: Open a file at a directory. Files: lib/openat.c m4/openat.m4 m4/lstat.m4 m4/mode_t.m4 Depends-on: fcntl-h extensions largefile openat-h [test $HAVE_OPENAT = 0 || test $REPLACE_OPENAT = 1] stdbool [test $HAVE_OPENAT = 0 || test $REPLACE_OPENAT = 1] sys_stat [test $HAVE_OPENAT = 0 || test $REPLACE_OPENAT = 1] fstat [test $REPLACE_OPENAT = 1] at-internal [test $HAVE_OPENAT = 0] dosname [test $HAVE_OPENAT = 0] errno [test $HAVE_OPENAT = 0] fchdir [test $HAVE_OPENAT = 0] open [test $HAVE_OPENAT = 0] openat-die [test $HAVE_OPENAT = 0] save-cwd [test $HAVE_OPENAT = 0] configure.ac: gl_FUNC_OPENAT if test $HAVE_OPENAT = 0 || test $REPLACE_OPENAT = 1; then AC_LIBOBJ([openat]) gl_PREREQ_OPENAT fi gl_MODULE_INDICATOR([openat]) dnl for lib/getcwd.c gl_FCNTL_MODULE_INDICATOR([openat]) Makefile.am: Include: <fcntl.h> License: GPL Maintainer: Jim Meyering, Eric Blake