Supply malloc and alloc_size attributes for extern allocators.

This documents the C API, and helps GCC generate a bit better code.
* conf_post.h (ATTRIBUTE_MALLOC, ATTRIBUTE_ALLOC_SIZE)
(ATTRIBUTE_MALLOC_SIZE): New macros.
* gmalloc.c (malloc, realloc, calloc):
* gtkutil.h (malloc_widget_value):
* lisp.h (ralloc, r_re_alloc, xmalloc, xzalloc, xrealloc, xnmalloc)
(xnrealloc, xstrdup, xlispstrdup, record_xmalloc):
Use them.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/gmalloc.c b/src/gmalloc.c
index 977abbdbbbd..ab1dfd07db2 100644
--- a/src/gmalloc.c
+++ b/src/gmalloc.c
@@ -51,12 +51,12 @@ extern "C"
 
 
 /* Allocate SIZE bytes of memory.  */
-extern void *malloc (size_t size);
+extern void *malloc (size_t size) ATTRIBUTE_MALLOC_SIZE ((1));
 /* Re-allocate the previously allocated block
    in ptr, making the new block SIZE bytes long.  */
-extern void *realloc (void *ptr, size_t size);
+extern void *realloc (void *ptr, size_t size) ATTRIBUTE_ALLOC_SIZE ((2));
 /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0.  */
-extern void *calloc (size_t nmemb, size_t size);
+extern void *calloc (size_t nmemb, size_t size) ATTRIBUTE_MALLOC_SIZE ((1,2));
 /* Free a block allocated by `malloc', `realloc' or `calloc'.  */
 extern void free (void *ptr);