Mercurial > gnulib
view modules/stpncpy @ 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 | bbe10ac8020e |
children | 1f14c6dd175d |
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Description: stpncpy() function: copy a size-bounded string, returning a pointer to its end. Files: lib/stpncpy.c m4/stpncpy.m4 Depends-on: extensions string configure.ac: gl_FUNC_STPNCPY if test $HAVE_STPNCPY = 0 || test $REPLACE_STPNCPY = 1; then AC_LIBOBJ([stpncpy]) gl_PREREQ_STPNCPY fi gl_STRING_MODULE_INDICATOR([stpncpy]) Makefile.am: Include: <string.h> License: LGPLv2+ Maintainer: Bruno Haible, glibc