diff options
Diffstat (limited to 'dbus/dbus-string.c')
| -rw-r--r-- | dbus/dbus-string.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/dbus/dbus-string.c b/dbus/dbus-string.c index c2f4150a..5a918617 100644 --- a/dbus/dbus-string.c +++ b/dbus/dbus-string.c @@ -124,6 +124,16 @@ typedef struct * @{ */ +/** Assert that the string's memory is 8-byte aligned. + * + * @todo Currently we just hope libc returns 8-byte aligned memory + * (which is true for GNU libc), but really we need to ensure it by + * allocating 8 extra bytes and keeping an "align_offset : 3" field + * in DBusString, or something along those lines. + */ +#define ASSERT_8_BYTE_ALIGNED(s) \ + _dbus_assert (_DBUS_ALIGN_ADDRESS (((const DBusRealString*)s)->str, 8) == ((const DBusRealString*)s)->str) + /** * Initializes a string. The maximum length may be _DBUS_INT_MAX for * no maximum. The string starts life with zero length. @@ -156,8 +166,8 @@ _dbus_string_init (DBusString *str, real->str = dbus_malloc (INITIAL_ALLOC); if (real->str == NULL) - return FALSE; - + return FALSE; + real->allocated = INITIAL_ALLOC; real->len = 0; real->str[real->len] = '\0'; @@ -167,6 +177,8 @@ _dbus_string_init (DBusString *str, real->locked = FALSE; real->invalid = FALSE; + ASSERT_8_BYTE_ALIGNED (str); + return TRUE; } @@ -196,6 +208,10 @@ _dbus_string_init_const (DBusString *str, real->max_length = real->len; real->constant = TRUE; real->invalid = FALSE; + + /* We don't require const strings to be 8-byte aligned as the + * memory is coming from elsewhere. + */ } /** @@ -248,6 +264,7 @@ _dbus_string_lock (DBusString *str) { real->str = new_str; real->allocated = new_allocated; + ASSERT_8_BYTE_ALIGNED (str); } } } @@ -454,6 +471,8 @@ set_length (DBusRealString *real, real->str = new_str; real->allocated = new_allocated; + + ASSERT_8_BYTE_ALIGNED (real); } real->len = new_length; |