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Tsirkin" , qemu-trivial , Jason Wang , qemu-devel , Markus Armbruster , Igor Mammedov Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Wed, Sep 30, 2020 at 3:47 AM Sergey Nizovtsev wro= te: > > Some objects accidentally inherit ObjectClass instead of Object. > They compile silently but may crash after downcasting. > > In this patch, we introduce a coccinelle script to find broken > declarations and fix them manually with proper base type. > > Signed-off-by: Sergey Nizovtsev thanks!! Reviewed-by: Marc-Andr=C3=A9 Lureau > --- > scripts/coccinelle/qobject-parent-type.cocci | 26 ++++++++++++++++++++ > include/hw/acpi/vmgenid.h | 2 +- > include/hw/misc/vmcoreinfo.h | 2 +- > include/net/can_host.h | 2 +- > MAINTAINERS | 1 + > 5 files changed, 30 insertions(+), 3 deletions(-) > create mode 100644 scripts/coccinelle/qobject-parent-type.cocci > > diff --git a/scripts/coccinelle/qobject-parent-type.cocci > b/scripts/coccinelle/qobject-parent-type.cocci > new file mode 100644 > index 0000000000..9afb3edd97 > --- /dev/null > +++ b/scripts/coccinelle/qobject-parent-type.cocci > @@ -0,0 +1,26 @@ > +// Highlight object declarations that don't look like object class but > +// accidentally inherit from it. > + > +@match@ > +identifier obj_t, fld; > +type parent_t =3D~ ".*Class$"; > +@@ > +struct obj_t { > + parent_t fld; > + ... > +}; > + > +@script:python filter depends on match@ > +obj_t << match.obj_t; > +@@ > +is_class_obj =3D obj_t.endswith('Class') > +cocci.include_match(not is_class_obj) > + > +@replacement depends on filter@ > +identifier match.obj_t, match.fld; > +type match.parent_t; > +@@ > +struct obj_t { > +* parent_t fld; > + ... > +}; > diff --git a/include/hw/acpi/vmgenid.h b/include/hw/acpi/vmgenid.h > index d50fbacb8e..cb4ad37fc5 100644 > --- a/include/hw/acpi/vmgenid.h > +++ b/include/hw/acpi/vmgenid.h > @@ -19,7 +19,7 @@ > OBJECT_DECLARE_SIMPLE_TYPE(VmGenIdState, VMGENID) > > struct VmGenIdState { > - DeviceClass parent_obj; > + DeviceState parent_obj; > QemuUUID guid; /* The 128-bit GUID seen by the guest = */ > uint8_t vmgenid_addr_le[8]; /* Address of the GUID (little-endian)= */ > }; > diff --git a/include/hw/misc/vmcoreinfo.h b/include/hw/misc/vmcoreinfo.h > index ebada6617a..0b7b55d400 100644 > --- a/include/hw/misc/vmcoreinfo.h > +++ b/include/hw/misc/vmcoreinfo.h > @@ -24,7 +24,7 @@ DECLARE_INSTANCE_CHECKER(VMCoreInfoState, VMCOREINFO, > typedef struct fw_cfg_vmcoreinfo FWCfgVMCoreInfo; > > struct VMCoreInfoState { > - DeviceClass parent_obj; > + DeviceState parent_obj; > > bool has_vmcoreinfo; > FWCfgVMCoreInfo vmcoreinfo; > diff --git a/include/net/can_host.h b/include/net/can_host.h > index 4e3ce3f954..caab71bdda 100644 > --- a/include/net/can_host.h > +++ b/include/net/can_host.h > @@ -35,7 +35,7 @@ > OBJECT_DECLARE_TYPE(CanHostState, CanHostClass, CAN_HOST) > > struct CanHostState { > - ObjectClass oc; > + Object oc; > > CanBusState *bus; > CanBusClientState bus_client; > diff --git a/MAINTAINERS b/MAINTAINERS > index 5eed1e692b..2160b8196a 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -2402,6 +2402,7 @@ F: qobject/ > F: include/qapi/qmp/ > X: include/qapi/qmp/dispatch.h > F: scripts/coccinelle/qobject.cocci > +F: scripts/coccinelle/qobject-parent-type.cocci > F: tests/check-qdict.c > F: tests/check-qjson.c > F: tests/check-qlist.c > -- > 2.28.0 >