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Supply malloc and alloc_size attributes for extern allocators.

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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.
This commit is contained in:
Paul Eggert 2014-05-22 09:40:35 -07:00
parent bbd03f131a
commit 74fde0f44f
5 changed files with 41 additions and 14 deletions
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12
src/ChangeLog
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@ -1,3 +1,15 @@
2014-05-22 Paul Eggert <eggert@cs.ucla.edu>
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.
2014-05-21 Paul Eggert <eggert@cs.ucla.edu>
Don't assume that ImageMagick uses a 16-bit quantum (Bug#17519).

14
src/conf_post.h
View file

@ -225,6 +225,20 @@ extern void _DebPrint (const char *fmt, ...);
#define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST
#if 3 <= __GNUC__
# define ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
#else
# define ATTRIBUTE_MALLOC
#endif
#if 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
# define ATTRIBUTE_ALLOC_SIZE(args) __attribute__ ((__alloc_size__ args))
#else
# define ATTRIBUTE_ALLOC_SIZE(args)
#endif
#define ATTRIBUTE_MALLOC_SIZE(args) ATTRIBUTE_MALLOC ATTRIBUTE_ALLOC_SIZE (args)
/* Work around GCC bug 59600: when a function is inlined, the inlined
code may have its addresses sanitized even if the function has the
no_sanitize_address attribute. This bug is fixed in GCC 4.9.0 and

6
src/gmalloc.c
View file

@ -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);

2
src/gtkutil.h
View file

@ -74,7 +74,7 @@ typedef struct xg_menu_item_cb_data_
} xg_menu_item_cb_data;
extern struct _widget_value *malloc_widget_value (void);
extern struct _widget_value *malloc_widget_value (void) ATTRIBUTE_MALLOC;
extern void free_widget_value (struct _widget_value *);
extern bool xg_uses_old_file_dialog (void) ATTRIBUTE_CONST;

21
src/lisp.h
View file

@ -3755,9 +3755,9 @@ INLINE void (check_cons_list) (void) { lisp_h_check_cons_list (); }
#ifdef REL_ALLOC
/* Defined in ralloc.c. */
extern void *r_alloc (void **, size_t);
extern void *r_alloc (void **, size_t) ATTRIBUTE_ALLOC_SIZE ((2));
extern void r_alloc_free (void **);
extern void *r_re_alloc (void **, size_t);
extern void *r_re_alloc (void **, size_t) ATTRIBUTE_ALLOC_SIZE ((2));
extern void r_alloc_reset_variable (void **, void **);
extern void r_alloc_inhibit_buffer_relocation (int);
#endif
@ -4391,16 +4391,17 @@ extern bool initialized;
/* True means ^G can quit instantly. */
extern bool immediate_quit;
extern void *xmalloc (size_t);
extern void *xzalloc (size_t);
extern void *xrealloc (void *, size_t);
extern void *xmalloc (size_t) ATTRIBUTE_MALLOC_SIZE ((1));
extern void *xzalloc (size_t) ATTRIBUTE_MALLOC_SIZE ((1));
extern void *xrealloc (void *, size_t) ATTRIBUTE_ALLOC_SIZE ((2));
extern void xfree (void *);
extern void *xnmalloc (ptrdiff_t, ptrdiff_t);
extern void *xnrealloc (void *, ptrdiff_t, ptrdiff_t);
extern void *xnmalloc (ptrdiff_t, ptrdiff_t) ATTRIBUTE_MALLOC_SIZE ((1,2));
extern void *xnrealloc (void *, ptrdiff_t, ptrdiff_t)
ATTRIBUTE_ALLOC_SIZE ((2,3));
extern void *xpalloc (void *, ptrdiff_t *, ptrdiff_t, ptrdiff_t, ptrdiff_t);
extern char *xstrdup (const char *);
extern char *xlispstrdup (Lisp_Object);
extern char *xstrdup (const char *) ATTRIBUTE_MALLOC;
extern char *xlispstrdup (Lisp_Object) ATTRIBUTE_MALLOC;
extern void dupstring (char **, char const *);
extern void xputenv (const char *);
@ -4432,7 +4433,7 @@ extern void init_system_name (void);
enum MAX_ALLOCA { MAX_ALLOCA = 16 * 1024 };
extern void *record_xmalloc (size_t);
extern void *record_xmalloc (size_t) ATTRIBUTE_ALLOC_SIZE ((1));
#define USE_SAFE_ALLOCA \
ptrdiff_t sa_count = SPECPDL_INDEX (); bool sa_must_free = false