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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 31933531b0dc
children 1f14c6dd175d
line wrap: on
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Description:
posix_spawn_file_actions_addclose() function: augment a child process actions
specification.

Files:
lib/spawn_faction_addclose.c
lib/spawn_int.h
m4/posix_spawn.m4

Depends-on:
spawn
getdtablesize                 [test $HAVE_POSIX_SPAWN = 0 || test $REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE = 1]
posix_spawn_file_actions_init [test $HAVE_POSIX_SPAWN = 0 || test $REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE = 1]

configure.ac:
gl_FUNC_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE
if test $HAVE_POSIX_SPAWN = 0 || test $REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE = 1; then
  AC_LIBOBJ([spawn_faction_addclose])
fi
gl_SPAWN_MODULE_INDICATOR([posix_spawn_file_actions_addclose])

Makefile.am:

Include:
<spawn.h>

License:
LGPLv2+

Maintainer:
Bruno Haible, glibc