Author: pfg
Date: Fri May 15 20:43:37 2015
New Revision: 282988
URL: https://svnweb.freebsd.org/changeset/base/282988
Log:
Make use of GCC alloc_align attribute
This lets the compiler know about the alignment of pointers returned
by aligned_alloc(3), posix_memalign(3). and contigmalloc(9)
Currently this is only supported in recent gcc but we are ready to
use it if clang implements it.
Relnotes: yes
Modified:
head/include/stdlib.h
head/sys/sys/malloc.h
Modified: head/include/stdlib.h
==============================================================================
--- head/include/stdlib.h Fri May 15 19:51:05 2015 (r282987)
+++ head/include/stdlib.h Fri May 15 20:43:37 2015 (r282988)
@@ -156,7 +156,8 @@ _Noreturn void _Exit(int);
* If we're in a mode greater than C99, expose C11 functions.
*/
#if __ISO_C_VISIBLE >= 2011 || __cplusplus >= 201103L
-void * aligned_alloc(size_t, size_t) __malloc_like __alloc_size(2);
+void * aligned_alloc(size_t, size_t) __malloc_like __alloc_align(1)
+ __alloc_size(2);
int at_quick_exit(void (*)(void));
_Noreturn void
quick_exit(int);
@@ -171,7 +172,7 @@ char *realpath(const char * __restrict,
int rand_r(unsigned *); /* (TSF) */
#endif
#if __POSIX_VISIBLE >= 200112
-int posix_memalign(void **, size_t, size_t) __nonnull(1)
+int posix_memalign(void **, size_t, size_t) __nonnull(1) __alloc_align(2)
__alloc_size(3); /* (ADV) */
int setenv(const char *, const char *, int);
int unsetenv(const char *);
Modified: head/sys/sys/malloc.h
==============================================================================
--- head/sys/sys/malloc.h Fri May 15 19:51:05 2015 (r282987)
+++ head/sys/sys/malloc.h Fri May 15 20:43:37 2015 (r282988)
@@ -174,7 +174,7 @@ void contigfree(void *addr, unsigned lon
void *contigmalloc(unsigned long size, struct malloc_type *type, int flags,
vm_paddr_t low, vm_paddr_t high, unsigned long alignment,
vm_paddr_t boundary) __malloc_like __result_use_check
- __alloc_size(1);
+ __alloc_size(1) __alloc_align(6);
void free(void *addr, struct malloc_type *type);
void *malloc(unsigned long size, struct malloc_type *type, int flags)
__malloc_like __result_use_check __alloc_size(1);
_______________________________________________
svn-src-all@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-all
To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
