Date: Fri, 15 May 2015 20:43:38 +0000 (UTC) From: "Pedro F. Giffuni" <pfg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r282988 - in head: include sys/sys Message-ID: <201505152043.t4FKhcMR072296@svn.freebsd.org>
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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);
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