Mercurial > gnulib
view modules/sysexits @ 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 | aebcca9ddd62 |
children |
line wrap: on
line source
Description: Exit status codes for some BSD system programs. Files: lib/sysexits.in.h m4/sysexits.m4 Depends-on: include_next stdlib configure.ac: gl_SYSEXITS Makefile.am: BUILT_SOURCES += $(SYSEXITS_H) # We need the following in order to create <sysexits.h> when the system # doesn't have one that works with the given compiler. if GL_GENERATE_SYSEXITS_H sysexits.h: sysexits.in.h $(top_builddir)/config.status $(AM_V_GEN)rm -f $@-t $@ && \ { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \ sed -e 's|@''GUARD_PREFIX''@|${gl_include_guard_prefix}|g' \ -e 's|@''HAVE_SYSEXITS_H''@|$(HAVE_SYSEXITS_H)|g' \ -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \ -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \ -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \ -e 's|@''NEXT_SYSEXITS_H''@|$(NEXT_SYSEXITS_H)|g' \ < $(srcdir)/sysexits.in.h; \ } > $@-t && \ mv -f $@-t $@ else sysexits.h: $(top_builddir)/config.status rm -f $@ endif MOSTLYCLEANFILES += sysexits.h sysexits.h-t Include: <sysexits.h> License: LGPLv2+ Maintainer: Simon Josefsson