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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 84116e99123d
children d7ff206ef5f6
line wrap: on
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Description:
Return the current working directory.

Files:
lib/getcwd.c
m4/getcwd-abort-bug.m4
m4/getcwd-path-max.m4
m4/getcwd.m4
m4/pathmax.m4

Depends-on:
unistd
extensions
pathmax         [test $REPLACE_GETCWD = 1]
mempcpy         [test $REPLACE_GETCWD = 1]
d-ino           [test $REPLACE_GETCWD = 1]
memmove         [test $REPLACE_GETCWD = 1]
openat          [test $REPLACE_GETCWD = 1]
fcntl-h         [test $REPLACE_GETCWD = 1]
fdopendir       [test $REPLACE_GETCWD = 1]
fstat           [test $REPLACE_GETCWD = 1]
fstatat         [test $REPLACE_GETCWD = 1]
opendir         [test $REPLACE_GETCWD = 1]
readdir         [test $REPLACE_GETCWD = 1]
rewinddir       [test $REPLACE_GETCWD = 1]
closedir        [test $REPLACE_GETCWD = 1]
stdbool         [test $REPLACE_GETCWD = 1]
malloc-posix    [test $REPLACE_GETCWD = 1]
strdup-posix    [test $REPLACE_GETCWD = 1]

configure.ac:
gl_FUNC_GETCWD
if test $REPLACE_GETCWD = 1; then
  AC_LIBOBJ([getcwd])
  gl_PREREQ_GETCWD
fi
gl_MODULE_INDICATOR([getcwd])
gl_UNISTD_MODULE_INDICATOR([getcwd])

Makefile.am:

Include:
<unistd.h>

License:
GPL

Maintainer:
all, glibc