diff options
Diffstat (limited to 'wcsmbs/wcsmbsload.c')
| -rw-r--r-- | wcsmbs/wcsmbsload.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/wcsmbs/wcsmbsload.c b/wcsmbs/wcsmbsload.c index 02cf94bab8..39611b7636 100644 --- a/wcsmbs/wcsmbsload.c +++ b/wcsmbs/wcsmbsload.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1998-2018 Free Software Foundation, Inc. +/* Copyright (C) 1998-2019 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. @@ -14,12 +14,13 @@ You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ + <https://www.gnu.org/licenses/>. */ #include <ctype.h> #include <langinfo.h> #include <limits.h> #include <stdlib.h> +#include <stdio.h> #include <string.h> #include <locale/localeinfo.h> @@ -223,12 +224,25 @@ __wcsmbs_clone_conv (struct gconv_fcts *copy) /* Copy the data. */ *copy = *orig; - /* Now increment the usage counters. - Note: This assumes copy->*_nsteps == 1. */ + /* Now increment the usage counters. Note: This assumes + copy->*_nsteps == 1. The current locale holds a reference, so it + is still there after acquiring the lock. */ + + __libc_lock_lock (__gconv_lock); + + bool overflow = false; if (copy->towc->__shlib_handle != NULL) - ++copy->towc->__counter; + overflow |= __builtin_add_overflow (copy->towc->__counter, 1, + ©->towc->__counter); if (copy->tomb->__shlib_handle != NULL) - ++copy->tomb->__counter; + overflow |= __builtin_add_overflow (copy->tomb->__counter, 1, + ©->tomb->__counter); + + __libc_lock_unlock (__gconv_lock); + + if (overflow) + __libc_fatal ("\ +Fatal glibc error: gconv module reference counter overflow\n"); } |