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view modules/faccessat @ 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 | f3bc58f169b7 |
children | 23bf293630c0 |
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Description: faccessat() function: check user's permissions for a file. Files: lib/faccessat.c lib/at-func.c m4/faccessat.m4 Depends-on: unistd extensions at-internal [test $HAVE_FACCESSAT = 0] dosname [test $HAVE_FACCESSAT = 0] errno [test $HAVE_FACCESSAT = 0] fchdir [test $HAVE_FACCESSAT = 0] fcntl-h [test $HAVE_FACCESSAT = 0] openat-die [test $HAVE_FACCESSAT = 0] openat-h [test $HAVE_FACCESSAT = 0] save-cwd [test $HAVE_FACCESSAT = 0] euidaccess [test $HAVE_FACCESSAT = 0] configure.ac: gl_FUNC_FACCESSAT if test $HAVE_FACCESSAT = 0; then AC_LIBOBJ([faccessat]) gl_PREREQ_FACCESSAT fi gl_MODULE_INDICATOR([faccessat]) gl_UNISTD_MODULE_INDICATOR([faccessat]) Makefile.am: Include: <fcntl.h> <unistd.h> Link: $(LIB_EACCESS) License: GPL Maintainer: Jim Meyering, Eric Blake