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>