Mercurial > gnulib
view modules/sys_time @ 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 | eaf70139087f |
children |
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Description: A <sys/time.h> that conforms better to POSIX. Files: lib/sys_time.in.h m4/sys_time_h.m4 m4/sys_socket_h.m4 Depends-on: include_next snippet/arg-nonnull snippet/c++defs snippet/warn-on-use configure.ac: gl_HEADER_SYS_TIME_H AC_PROG_MKDIR_P Makefile.am: BUILT_SOURCES += sys/time.h # We need the following in order to create <sys/time.h> when the system # doesn't have one that works with the given compiler. sys/time.h: sys_time.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_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_TIME_H''@/$(HAVE_SYS_TIME_H)/g' \ -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \ -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \ -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \ -e 's|@''NEXT_SYS_TIME_H''@|$(NEXT_SYS_TIME_H)|g' \ -e 's/@''GNULIB_GETTIMEOFDAY''@/$(GNULIB_GETTIMEOFDAY)/g' \ -e 's|@''HAVE_WINSOCK2_H''@|$(HAVE_WINSOCK2_H)|g' \ -e 's/@''HAVE_GETTIMEOFDAY''@/$(HAVE_GETTIMEOFDAY)/g' \ -e 's/@''HAVE_STRUCT_TIMEVAL''@/$(HAVE_STRUCT_TIMEVAL)/g' \ -e 's/@''REPLACE_GETTIMEOFDAY''@/$(REPLACE_GETTIMEOFDAY)/g' \ -e 's/@''REPLACE_STRUCT_TIMEVAL''@/$(REPLACE_STRUCT_TIMEVAL)/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)/sys_time.in.h; \ } > $@-t && \ mv $@-t $@ MOSTLYCLEANFILES += sys/time.h sys/time.h-t Include: <sys/time.h> License: LGPLv2+ Maintainer: all