Mercurial > gnulib
view modules/sys_utsname @ 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 | 0b18aadcd2f4 |
children | 1f14c6dd175d |
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Description: A <sys/utsname.h> for systems which lack it. Files: lib/sys_utsname.in.h m4/sys_utsname_h.m4 Depends-on: include_next snippet/arg-nonnull snippet/warn-on-use configure.ac: gl_SYS_UTSNAME_H AC_PROG_MKDIR_P Makefile.am: BUILT_SOURCES += sys/utsname.h # We need the following in order to create <sys/utsname.h> when the system # does not have one. sys/utsname.h: sys_utsname.in.h $(top_builddir)/config.status $(WARN_ON_USE_H) $(ARG_NONNULL_H) $(AM_V_at)$(MKDIR_P) sys $(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_SYS_UTSNAME_H''@/$(HAVE_SYS_UTSNAME_H)/g' \ -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \ -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \ -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \ -e 's|@''NEXT_SYS_UTSNAME_H''@|$(NEXT_SYS_UTSNAME_H)|g' \ -e 's/@''GNULIB_UNAME''@/$(GNULIB_UNAME)/g' \ -e 's|@''HAVE_STRUCT_UTSNAME''@|$(HAVE_STRUCT_UTSNAME)|g' \ -e 's|@''HAVE_UNAME''@|$(HAVE_UNAME)|g' \ -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \ -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \ < $(srcdir)/sys_utsname.in.h; \ } > $@-t && \ mv $@-t $@ MOSTLYCLEANFILES += sys/utsname.h sys/utsname.h-t MOSTLYCLEANDIRS += sys Include: <sys/utsname.h> License: LGPLv2+ Maintainer: Bruno Haible