Mercurial > gnulib
view modules/selinux-h @ 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 | fb73202ea7d8 |
children |
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Description: SELinux-related headers for systems that lack them. Files: lib/getfilecon.c lib/se-context.in.h lib/se-selinux.in.h lib/se-context.c lib/se-selinux.c m4/selinux-context-h.m4 m4/selinux-selinux-h.m4 Depends-on: errno extern-inline snippet/unused-parameter configure.ac: gl_HEADERS_SELINUX_SELINUX_H gl_HEADERS_SELINUX_CONTEXT_H if test "$with_selinux" != no && test "$ac_cv_header_selinux_selinux_h" = yes; then AC_LIBOBJ([getfilecon]) fi Makefile.am: lib_SOURCES += se-context.in.h se-selinux.in.h se-context.c se-selinux.c BUILT_SOURCES += selinux/selinux.h selinux/selinux.h: se-selinux.in.h $(top_builddir)/config.status $(UNUSED_PARAMETER_H) $(AM_V_at)$(MKDIR_P) selinux $(AM_V_GEN)rm -f $@-t $@ && \ { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \ sed -e 's|@''GUARD_PREFIX''@|${gl_include_guard_prefix}|g' \ -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \ -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \ -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \ -e 's|@''NEXT_SELINUX_SELINUX_H''@|$(NEXT_SELINUX_SELINUX_H)|g' \ -e '/definition of _GL_UNUSED_PARAMETER/r $(UNUSED_PARAMETER_H)' \ < $(srcdir)/se-selinux.in.h; \ } > $@-t && \ chmod a-x $@-t && \ mv $@-t $@ MOSTLYCLEANFILES += selinux/selinux.h selinux/selinux.h-t BUILT_SOURCES += $(SELINUX_CONTEXT_H) if GL_GENERATE_SELINUX_CONTEXT_H selinux/context.h: se-context.in.h $(top_builddir)/config.status $(UNUSED_PARAMETER_H) $(AM_V_at)$(MKDIR_P) selinux $(AM_V_GEN)rm -f $@-t $@ && \ { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \ sed -e '/definition of _GL_UNUSED_PARAMETER/r $(UNUSED_PARAMETER_H)' \ < $(srcdir)/se-context.in.h; \ } > $@-t && \ chmod a-x $@-t && \ mv $@-t $@ else selinux/context.h: $(top_builddir)/config.status rm -f $@ endif MOSTLYCLEANFILES += selinux/context.h selinux/context.h-t MOSTLYCLEANDIRS += selinux Include: <selinux/selinux.h> <selinux/context.h> Link: $(LIB_SELINUX) License: LGPLv2+ Maintainer: Jim Meyering