Mercurial > gnulib
view modules/strings @ 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 | 4f0f8efbcc1e |
children | 79454345ccfc |
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Description: A substitute <strings.h>. Files: lib/strings.in.h m4/strings_h.m4 Depends-on: include_next snippet/arg-nonnull snippet/c++defs snippet/warn-on-use sys_types configure.ac: gl_HEADER_STRINGS_H Makefile.am: BUILT_SOURCES += strings.h # We need the following in order to create <strings.h> when the system # doesn't have one that works with the given compiler. strings.h: strings.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H) $(ARG_NONNULL_H) $(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_STRINGS_H''@|$(HAVE_STRINGS_H)|g' \ -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \ -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \ -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \ -e 's|@''NEXT_STRINGS_H''@|$(NEXT_STRINGS_H)|g' \ -e 's|@''GNULIB_FFS''@|$(GNULIB_FFS)|g' \ -e 's|@''HAVE_FFS''@|$(HAVE_FFS)|g' \ -e 's|@''HAVE_STRCASECMP''@|$(HAVE_STRCASECMP)|g' \ -e 's|@''HAVE_DECL_STRNCASECMP''@|$(HAVE_DECL_STRNCASECMP)|g' \ -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \ -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \ -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \ < $(srcdir)/strings.in.h; \ } > $@-t && \ mv $@-t $@ MOSTLYCLEANFILES += strings.h strings.h-t Include: <strings.h> License: LGPLv2+ Maintainer: all