Declare malloc hook variables as volatile.

3 files changed, 56 insertions, 46 deletions

diff --git a/ChangeLog b/ChangeLog
index efa978e..5fb62a6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2011-05-29  Ulrich Drepper  <drepper@gmail.com>
 
+	[BZ #11781]
+	* malloc/malloc.h: Declare malloc hook variables as volatile.
+
 	* locale/programs/locarchive.c (add_locale_to_archive): Fix typo
 	in last patch.
 
diff --git a/NEWS b/NEWS
index 7640467..f95fcd2 100644
--- a/NEWS
+++ b/NEWS
@@ -10,14 +10,14 @@ Version 2.14
 * The following bugs are resolved with this release:
 
   386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11257, 11258,
-  11487, 11532, 11578, 11653, 11668, 11697, 11724, 11799, 11820, 11837,
-  11857, 11869, 11892, 11895, 11901, 11945, 11947, 11952, 11987, 12052,
-  12083, 12158, 12178, 12200, 12346, 12393, 12420, 12432, 12445, 12449,
-  12453, 12454, 12460, 12469, 12489, 12509, 12510, 12511, 12518, 12527,
-  12541, 12545, 12551, 12582, 12583, 12587, 12597, 12601, 12611, 12625,
-  12626, 12631, 12650, 12653, 12655, 12660, 12671, 12681, 12685, 12711,
-  12713, 12714, 12717, 12723, 12724, 12734, 12738, 12746, 12766, 12775,
-  12777, 12782, 12788, 12792, 12795, 12811, 12813, 12814
+  11487, 11532, 11578, 11653, 11668, 11697, 11724, 11781, 11799, 11820,
+  11837, 11857, 11869, 11892, 11895, 11901, 11945, 11947, 11952, 11987,
+  12052, 12083, 12158, 12178, 12200, 12346, 12393, 12420, 12432, 12445,
+  12449, 12453, 12454, 12460, 12469, 12489, 12509, 12510, 12511, 12518,
+  12527, 12541, 12545, 12551, 12582, 12583, 12587, 12597, 12601, 12611,
+  12625, 12626, 12631, 12650, 12653, 12655, 12660, 12671, 12681, 12685,
+  12711, 12713, 12714, 12717, 12723, 12724, 12734, 12738, 12746, 12766,
+  12775, 12777, 12782, 12788, 12792, 12795, 12811, 12813, 12814
 
 * The RPC implementation in libc is obsoleted.  Old programs keep working
   but new programs cannot be linked with the routines in libc anymore.
diff --git a/malloc/malloc.h b/malloc/malloc.h
index d0aedc0..2bdece0 100644
--- a/malloc/malloc.h
+++ b/malloc/malloc.h
@@ -1,5 +1,5 @@
 /* Prototypes and definition for malloc implementation.
-   Copyright (C) 1996, 1997, 1999, 2000, 2002-2004, 2005, 2007, 2009
+   Copyright (C) 1996, 1997, 1999, 2000, 2002-2004, 2005, 2007, 2009, 2011
    Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
@@ -37,10 +37,17 @@
    functions.  */
 # define __MALLOC_PMT(args)	args
 
+# ifdef _LIBC
+#  define __MALLOC_HOOK_VOLATILE
+# else
+#  define __MALLOC_HOOK_VOLATILE
+# endif
+
 #else	/* Not GCC.  */
 
 # define __MALLOC_P(args)	args
 # define __MALLOC_PMT(args)	args
+# define __MALLOC_HOOK_VOLATILE
 
 #endif	/* GCC.  */
 
@@ -48,50 +55,49 @@
 __BEGIN_DECLS
 
 /* Allocate SIZE bytes of memory.  */
-extern void *malloc __MALLOC_P ((size_t __size)) __attribute_malloc__ __wur;
+extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur;
 
 /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0.  */
-extern void *calloc __MALLOC_P ((size_t __nmemb, size_t __size))
-       __attribute_malloc__ __wur;
+extern void *calloc (size_t __nmemb, size_t __size)
+     __THROW __attribute_malloc__ __wur;
 
 /* Re-allocate the previously allocated block in __ptr, making the new
    block SIZE bytes long.  */
 /* __attribute_malloc__ is not used, because if realloc returns
    the same pointer that was passed to it, aliasing needs to be allowed
    between objects pointed by the old and new pointers.  */
-extern void *realloc __MALLOC_P ((void *__ptr, size_t __size))
-       __attribute_warn_unused_result__;
+extern void *realloc (void *__ptr, size_t __size)
+     __THROW __attribute_warn_unused_result__;
 
 /* Free a block allocated by `malloc', `realloc' or `calloc'.  */
-extern void free __MALLOC_P ((void *__ptr));
+extern void free (void *__ptr) __THROW;
 
 /* Free a block allocated by `calloc'. */
-extern void cfree __MALLOC_P ((void *__ptr));
+extern void cfree (void *__ptr) __THROW;
 
 /* Allocate SIZE bytes allocated to ALIGNMENT bytes.  */
-extern void *memalign __MALLOC_P ((size_t __alignment, size_t __size))
-       __attribute_malloc__ __wur;
+extern void *memalign (size_t __alignment, size_t __size)
+     __THROW __attribute_malloc__ __wur;
 
 /* Allocate SIZE bytes on a page boundary.  */
-extern void *valloc __MALLOC_P ((size_t __size))
-       __attribute_malloc__ __wur;
+extern void *valloc (size_t __size) __THROW __attribute_malloc__ __wur;
 
 /* Equivalent to valloc(minimum-page-that-holds(n)), that is, round up
    __size to nearest pagesize. */
-extern void * pvalloc __MALLOC_P ((size_t __size))
-       __attribute_malloc__ __wur;
+extern void * pvalloc (size_t __size) __THROW __attribute_malloc__ __wur;
 
 /* Underlying allocation function; successive calls should return
    contiguous pieces of memory.  */
-extern void *(*__morecore) __MALLOC_PMT ((ptrdiff_t __size));
+extern void *(*__morecore) (ptrdiff_t __size);
 
 /* Default value of `__morecore'.  */
-extern void *__default_morecore __MALLOC_P ((ptrdiff_t __size))
-       __attribute_malloc__;
+extern void *__default_morecore (ptrdiff_t __size)
+     __THROW __attribute_malloc__;
 
 /* SVID2/XPG mallinfo structure */
 
-struct mallinfo {
+struct mallinfo
+{
   int arena;    /* non-mmapped space allocated from system */
   int ordblks;  /* number of free chunks */
   int smblks;   /* number of fastbin blocks */
@@ -105,7 +111,7 @@ struct mallinfo {
 };
 
 /* Returns a copy of the updated current mallinfo. */
-extern struct mallinfo mallinfo __MALLOC_P ((void));
+extern struct mallinfo mallinfo (void) __THROW;
 
 /* SVID2/XPG mallopt options */
 #ifndef M_MXFAST
@@ -132,47 +138,48 @@ extern struct mallinfo mallinfo __MALLOC_P ((void));
 #define M_ARENA_MAX	    -8
 
 /* General SVID/XPG interface to tunable parameters. */
-extern int mallopt __MALLOC_P ((int __param, int __val));
+extern int mallopt (int __param, int __val) __THROW;
 
 /* Release all but __pad bytes of freed top-most memory back to the
    system. Return 1 if successful, else 0. */
-extern int malloc_trim __MALLOC_P ((size_t __pad));
+extern int malloc_trim (size_t __pad) __THROW;
 
 /* Report the number of usable allocated bytes associated with allocated
    chunk __ptr. */
-extern size_t malloc_usable_size __MALLOC_P ((void *__ptr));
+extern size_t malloc_usable_size (void *__ptr) __THROW;
 
 /* Prints brief summary statistics on stderr. */
-extern void malloc_stats __MALLOC_P ((void));
+extern void malloc_stats (void) __THROW;
 
 /* Output information about state of allocator to stream FP.  */
-extern int malloc_info (int __options, FILE *__fp);
+extern int malloc_info (int __options, FILE *__fp) __THROW;
 
 /* Record the state of all malloc variables in an opaque data structure. */
-extern void *malloc_get_state __MALLOC_P ((void));
+extern void *malloc_get_state (void) __THROW;
 
 /* Restore the state of all malloc variables from data obtained with
    malloc_get_state(). */
-extern int malloc_set_state __MALLOC_P ((void *__ptr));
+extern int malloc_set_state (void *__ptr) __THROW;
 
 /* Called once when malloc is initialized; redefining this variable in
    the application provides the preferred way to set up the hook
    pointers. */
-extern void (*__malloc_initialize_hook) __MALLOC_PMT ((void));
+extern void (*__malloc_initialize_hook) (void);
 /* Hooks for debugging and user-defined versions. */
-extern void (*__free_hook) __MALLOC_PMT ((void *__ptr,
-					__const __malloc_ptr_t));
-extern void *(*__malloc_hook) __MALLOC_PMT ((size_t __size,
-					     __const __malloc_ptr_t));
-extern void *(*__realloc_hook) __MALLOC_PMT ((void *__ptr, size_t __size,
-					      __const __malloc_ptr_t));
-extern void *(*__memalign_hook) __MALLOC_PMT ((size_t __alignment,
-					       size_t __size,
-					       __const __malloc_ptr_t));
-extern void (*__after_morecore_hook) __MALLOC_PMT ((void));
+extern void (*__MALLOC_HOOK_VOLATILE __free_hook) (void *__ptr,
+						   __const __malloc_ptr_t);
+extern void *(*__MALLOC_HOOK_VOLATILE __malloc_hook) (size_t __size,
+						      __const __malloc_ptr_t);
+extern void *(*__MALLOC_HOOK_VOLATILE __realloc_hook) (void *__ptr,
+						       size_t __size,
+						       __const __malloc_ptr_t);
+extern void *(*__MALLOC_HOOK_VOLATILE __memalign_hook) (size_t __alignment,
+							size_t __size,
+							__const __malloc_ptr_t);
+extern void (*__MALLOC_HOOK_VOLATILE __after_morecore_hook) (void);
 
 /* Activate a standard set of debugging hooks. */
-extern void __malloc_check_init __MALLOC_P ((void));
+extern void __malloc_check_init (void) __THROW;
 
 
 __END_DECLS