Mercurial > gnulib
view modules/poll @ 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 | 5ae6d295f337 |
children | 39c9960ea17b |
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Description: poll() function: wait for some event on a set of file descriptors. Files: lib/poll.c m4/poll.m4 Depends-on: poll-h alloca [test $HAVE_POLL = 0 || test $REPLACE_POLL = 1] select [test $HAVE_POLL = 0 || test $REPLACE_POLL = 1] sockets [test $HAVE_POLL = 0 || test $REPLACE_POLL = 1] sys_select [test $HAVE_POLL = 0 || test $REPLACE_POLL = 1] sys_time [test $HAVE_POLL = 0 || test $REPLACE_POLL = 1] errno [test $HAVE_POLL = 0 || test $REPLACE_POLL = 1] msvc-nothrow [test $HAVE_POLL = 0 || test $REPLACE_POLL = 1] configure.ac: gl_FUNC_POLL if test $HAVE_POLL = 0 || test $REPLACE_POLL = 1; then AC_LIBOBJ([poll]) gl_PREREQ_POLL fi gl_POLL_MODULE_INDICATOR([poll]) Makefile.am: Include: <poll.h> Link: $(LIB_POLL) License: LGPLv2+ Maintainer: Paolo Bonzini <bonzini@gnu.org>