Mercurial > gnulib
view modules/iswctype @ 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 | 6d2f5db1bc07 |
children | 1f14c6dd175d |
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Description: iswctype() function: test whether a wide character has a given property. Status: obsolete Notice: This module is obsolete. Files: lib/iswctype.c lib/iswctype-impl.h m4/iswctype.m4 Depends-on: wctype-h configure.ac: gl_FUNC_ISWCTYPE if test $HAVE_WCTYPE_T = 0; then AC_LIBOBJ([iswctype]) fi gl_WCTYPE_MODULE_INDICATOR([iswctype]) Makefile.am: Include: <wctype.h> License: LGPL Maintainer: Bruno Haible