Mercurial > gnulib
view modules/netdb @ 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 |
line wrap: on
line source
Description: A <netdb.h> for systems lacking it. Files: lib/netdb.in.h m4/netdb_h.m4 Depends-on: include_next snippet/arg-nonnull snippet/c++defs snippet/warn-on-use sys_socket configure.ac: gl_HEADER_NETDB Makefile.am: BUILT_SOURCES += netdb.h # We need the following in order to create <netdb.h> when the system # doesn't have one that works with the given compiler. netdb.h: netdb.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_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|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \ -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \ -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \ -e 's|@''NEXT_NETDB_H''@|$(NEXT_NETDB_H)|g' \ -e 's|@''HAVE_NETDB_H''@|$(HAVE_NETDB_H)|g' \ -e 's/@''GNULIB_GETADDRINFO''@/$(GNULIB_GETADDRINFO)/g' \ -e 's|@''HAVE_STRUCT_ADDRINFO''@|$(HAVE_STRUCT_ADDRINFO)|g' \ -e 's|@''HAVE_DECL_FREEADDRINFO''@|$(HAVE_DECL_FREEADDRINFO)|g' \ -e 's|@''HAVE_DECL_GAI_STRERROR''@|$(HAVE_DECL_GAI_STRERROR)|g' \ -e 's|@''HAVE_DECL_GETADDRINFO''@|$(HAVE_DECL_GETADDRINFO)|g' \ -e 's|@''HAVE_DECL_GETNAMEINFO''@|$(HAVE_DECL_GETNAMEINFO)|g' \ -e 's|@''REPLACE_GAI_STRERROR''@|$(REPLACE_GAI_STRERROR)|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)/netdb.in.h; \ } > $@-t && \ mv $@-t $@ MOSTLYCLEANFILES += netdb.h netdb.h-t Include: <netdb.h> License: LGPLv2+ Maintainer: Simon Josefsson