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Bug 652197 – Improper handling of double values in GDBusMessage

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Matthew Bucknall pointed out

  GDBusMessage does not serialize/deserialize double values correctly
  on platforms with strict alignment constraints (in my particular
  case, ARM926EJ-S).

This was reported in

 https://bugzilla.gnome.org/show_bug.cgi?id=652197

Signed-off-by: David Zeuthen <davidz@redhat.com>
This commit is contained in:
David Zeuthen 2011-06-09 12:02:30 -04:00
parent f819aa5f17
commit 13b93f0c48
1 changed files with 12 additions and 9 deletions
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21
gio/gdbusmessage.c
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@ -1184,14 +1184,15 @@ parse_value_from_blob (GMemoryInputStream *mis,
goto fail;
if (!just_align)
{
guint64 v;
gdouble *encoded;
union {
guint64 v_uint64;
gdouble v_double;
} u;
G_STATIC_ASSERT (sizeof (gdouble) == sizeof (guint64));
v = g_data_input_stream_read_uint64 (dis, NULL, &local_error);
u.v_uint64 = g_data_input_stream_read_uint64 (dis, NULL, &local_error);
if (local_error != NULL)
goto fail;
encoded = (gdouble *) &v;
ret = g_variant_new_double (*encoded);
ret = g_variant_new_double (u.v_double);
}
}
else if (g_variant_type_equal (type, G_VARIANT_TYPE_STRING))
@ -1941,11 +1942,13 @@ append_value_to_blob (GVariant *value,
padding_added = ensure_output_padding (mos, dos, 8);
if (value != NULL)
{
guint64 *encoded;
gdouble v = g_variant_get_double (value);
union {
guint64 v_uint64;
gdouble v_double;
} u;
G_STATIC_ASSERT (sizeof (gdouble) == sizeof (guint64));
encoded = (guint64 *) &v;
g_data_output_stream_put_uint64 (dos, *encoded, NULL, NULL);
u.v_double = g_variant_get_double (value);
g_data_output_stream_put_uint64 (dos, u.v_uint64, NULL, NULL);
}
}
else if (g_variant_type_equal (type, G_VARIANT_TYPE_STRING))