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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 | 940af4cda54f |
children | 00bffdd9af60 |
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Description: Determine whether two file names refer to the same directory entry of the same directory. Files: lib/same.h lib/same.c m4/same.m4 Depends-on: error dirname same-inode stat stdbool memcmp configure.ac: gl_SAME Makefile.am: lib_SOURCES += same.c Include: "same.h" License: GPL Maintainer: Jim Meyering