Mercurial > gnulib
view modules/tmpfile @ 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 | cbacacbdc7c9 |
children | 5c7e0484c1e9 |
line wrap: on
line source
Description: tmpfile() function: create a temporary file. Files: lib/tmpfile.c m4/tmpfile.m4 Depends-on: stdio largefile pathmax [test $REPLACE_TMPFILE = 1] tempname [test $REPLACE_TMPFILE = 1] tmpdir [test $REPLACE_TMPFILE = 1] configure.ac: gl_FUNC_TMPFILE if test $REPLACE_TMPFILE = 1; then AC_LIBOBJ([tmpfile]) gl_PREREQ_TMPFILE fi gl_STDIO_MODULE_INDICATOR([tmpfile]) Makefile.am: Include: <stdio.h> License: LGPL Maintainer: Ben Pfaff