/*
add a name to an existing pointer - va_list version
*/
-static inline const char *talloc_set_name_v(const void *ptr, const char *fmt, va_list ap) PRINTF_ATTRIBUTE(2,0);
+static inline const char *talloc_set_name_v(const void *ptr, const char *fmt, va_list ap) PRINTF_FMT(2,0);
static inline const char *talloc_set_name_v(const void *ptr, const char *fmt, va_list ap)
{
return __talloc(context, size);
}
+static int talloc_destroy_pointer(void ***pptr)
+{
+ if ((uintptr_t)**pptr < getpagesize())
+ TALLOC_ABORT("Double free or invalid talloc_set?");
+ /* Invalidate pointer so it can't be used again. */
+ **pptr = (void *)1;
+ return 0;
+}
+
+void _talloc_set(void *ptr, const void *ctx, size_t size, const char *name)
+{
+ void ***child;
+ void *p;
+
+ p = talloc_named_const(ctx, size, name);
+ if (unlikely(!p))
+ goto set_ptr;
+
+ child = talloc(p, void **);
+ if (unlikely(!child)) {
+ talloc_free(p);
+ p = NULL;
+ goto set_ptr;
+ }
+ *child = ptr;
+ talloc_set_name_const(child, "talloc_set destructor");
+ talloc_set_destructor(child, talloc_destroy_pointer);
+
+set_ptr:
+ /* memcpy rather than cast avoids aliasing problems. */
+ memcpy(ptr, &p, sizeof(p));
+}
+
/*
externally callable talloc_set_name_const()
*/