Mercurial > gnulib

view m4/msvc-inval.m4 @ 37246:5cfb3a67238d

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
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 c741bc27922a
children 344018b6e5d7
line wrap: on
line source

# msvc-inval.m4 serial 1
dnl Copyright (C) 2011-2013 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

AC_DEFUN([gl_MSVC_INVAL],
[
  AC_CHECK_FUNCS_ONCE([_set_invalid_parameter_handler])
  if test $ac_cv_func__set_invalid_parameter_handler = yes; then
    HAVE_MSVC_INVALID_PARAMETER_HANDLER=1
    AC_DEFINE([HAVE_MSVC_INVALID_PARAMETER_HANDLER], [1],
      [Define to 1 on MSVC platforms that have the "invalid parameter handler"
       concept.])
  else
    HAVE_MSVC_INVALID_PARAMETER_HANDLER=0
  fi
  AC_SUBST([HAVE_MSVC_INVALID_PARAMETER_HANDLER])
])