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gobject: Sink floating pspecs if adding them to a class fails

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This may fix Coverity assuming that pspecs are leaked, which is causing
tens and tens of false positives in the latest Coverity reports for
GLib.

Ensure that the pspecs are sunk (if floating) even if adding them to the
class fails (due to validation failure or an identically named property
already existing).

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

(cherry-picked from commit 8f7df344b636d5fda3d05560f5142d5d8515662a)
This commit is contained in:
Philip Withnall 2022-06-07 11:19:06 +01:00 committed by Marco Trevisan (Treviño)
parent af10448a05
commit cd657d692d
1 changed files with 16 additions and 4 deletions
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16
gobject/gobject.c
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@ -572,22 +572,25 @@ g_object_do_class_init (GObjectClass *class)
g_type_add_interface_check (NULL, object_interface_check_properties);
}
/* Sinks @pspec if it’s a floating ref. */
static inline gboolean
install_property_internal (GType g_type,
guint property_id,
GParamSpec *pspec)
{
g_param_spec_ref_sink (pspec);
if (g_param_spec_pool_lookup (pspec_pool, pspec->name, g_type, FALSE))
{
g_warning ("When installing property: type '%s' already has a property named '%s'",
g_type_name (g_type),
pspec->name);
g_param_spec_unref (pspec);
return FALSE;
}
g_param_spec_ref_sink (pspec);
PARAM_SPEC_SET_PARAM_ID (pspec, property_id);
g_param_spec_pool_insert (pspec_pool, pspec, g_type);
g_param_spec_pool_insert (pspec_pool, g_steal_pointer (&pspec), g_type);
return TRUE;
}
@ -608,6 +611,7 @@ validate_pspec_to_install (GParamSpec *pspec)
return TRUE;
}
/* Sinks @pspec if it’s a floating ref. */
static gboolean
validate_and_install_class_property (GObjectClass *class,
GType oclass_type,
@ -616,7 +620,11 @@ validate_and_install_class_property (GObjectClass *class,
GParamSpec *pspec)
{
if (!validate_pspec_to_install (pspec))
{
g_param_spec_ref_sink (pspec);
g_param_spec_unref (pspec);
return FALSE;
}
if (pspec->flags & G_PARAM_WRITABLE)
g_return_val_if_fail (class->set_property != NULL, FALSE);
@ -824,7 +832,11 @@ g_object_interface_install_property (gpointer g_iface,
g_return_if_fail (!G_IS_PARAM_SPEC_OVERRIDE (pspec)); /* paranoid */
if (!validate_pspec_to_install (pspec))
{
g_param_spec_ref_sink (pspec);
g_param_spec_unref (pspec);
return;
}
(void) install_property_internal (iface_class->g_type, 0, pspec);
}