diff options
Diffstat (limited to 'gnulib/import/malloca.h')
| -rw-r--r-- | gnulib/import/malloca.h | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/gnulib/import/malloca.h b/gnulib/import/malloca.h index fa27a9e7a2d..d80c316caa9 100644 --- a/gnulib/import/malloca.h +++ b/gnulib/import/malloca.h @@ -1,5 +1,5 @@ /* Safe automatic memory allocation. - Copyright (C) 2003-2007, 2009-2016 Free Software Foundation, Inc. + Copyright (C) 2003-2007, 2009-2019 Free Software Foundation, Inc. Written by Bruno Haible <bruno@clisp.org>, 2003. This program is free software; you can redistribute it and/or modify @@ -13,7 +13,7 @@ GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with this program; if not, see <http://www.gnu.org/licenses/>. */ + along with this program; if not, see <https://www.gnu.org/licenses/>. */ #ifndef _MALLOCA_H #define _MALLOCA_H @@ -21,6 +21,9 @@ #include <alloca.h> #include <stddef.h> #include <stdlib.h> +#include <stdint.h> + +#include "xalloc-oversized.h" #ifdef __cplusplus @@ -53,8 +56,10 @@ extern "C" { the function returns. Upon failure, it returns NULL. */ #if HAVE_ALLOCA # define malloca(N) \ - ((N) < 4032 - sa_increment \ - ? (void *) ((char *) alloca ((N) + sa_increment) + sa_increment) \ + ((N) < 4032 - (2 * sa_alignment_max - 1) \ + ? (void *) (((uintptr_t) (char *) alloca ((N) + 2 * sa_alignment_max - 1) \ + + (2 * sa_alignment_max - 1)) \ + & ~(uintptr_t)(2 * sa_alignment_max - 1)) \ : mmalloca (N)) #else # define malloca(N) \ @@ -73,15 +78,7 @@ extern void freea (void *p); It allocates an array of N objects, each with S bytes of memory, on the stack. S must be positive and N must be nonnegative. The array must be freed using freea() before the function returns. */ -#if 1 -/* Cf. the definition of xalloc_oversized. */ -# define nmalloca(n, s) \ - ((n) > (size_t) (sizeof (ptrdiff_t) <= sizeof (size_t) ? -1 : -2) / (s) \ - ? NULL \ - : malloca ((n) * (s))) -#else -extern void * nmalloca (size_t n, size_t s); -#endif +#define nmalloca(n, s) (xalloc_oversized (n, s) ? NULL : malloca ((n) * (s))) #ifdef __cplusplus @@ -124,10 +121,7 @@ enum | (sa_alignment_longlong - 1) #endif | (sa_alignment_longdouble - 1) - ) + 1, -/* The increment that guarantees room for a magic word must be >= sizeof (int) - and a multiple of sa_alignment_max. */ - sa_increment = ((sizeof (int) + sa_alignment_max - 1) / sa_alignment_max) * sa_alignment_max + ) + 1 }; #endif /* _MALLOCA_H */ |