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[PULL 13/39] qom: fix objects with improper parent type
From: |
Paolo Bonzini |
Subject: |
[PULL 13/39] qom: fix objects with improper parent type |
Date: |
Sat, 10 Oct 2020 03:57:13 -0400 |
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 <snizovtsev@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
MAINTAINERS | 1 +
include/hw/acpi/vmgenid.h | 2 +-
include/hw/misc/vmcoreinfo.h | 2 +-
include/net/can_host.h | 2 +-
scripts/coccinelle/qom-parent-type.cocci | 26 ++++++++++++++++++++++++
5 files changed, 30 insertions(+), 3 deletions(-)
create mode 100644 scripts/coccinelle/qom-parent-type.cocci
diff --git a/MAINTAINERS b/MAINTAINERS
index 7ef459a33c..fcb2c03c2b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2462,6 +2462,7 @@ F: include/monitor/qdev.h
F: include/qom/
F: qapi/qom.json
F: qapi/qdev.json
+F: scripts/coccinelle/qom-parent-type.cocci
F: softmmu/qdev-monitor.c
F: qom/
F: tests/check-qom-interface.c
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/scripts/coccinelle/qom-parent-type.cocci
b/scripts/coccinelle/qom-parent-type.cocci
new file mode 100644
index 0000000000..9afb3edd97
--- /dev/null
+++ b/scripts/coccinelle/qom-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 =~ ".*Class$";
+@@
+struct obj_t {
+ parent_t fld;
+ ...
+};
+
+@script:python filter depends on match@
+obj_t << match.obj_t;
+@@
+is_class_obj = 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;
+ ...
+};
--
2.26.2
- [PULL 02/39] meson.build: Sort sourcesets alphabetically, (continued)
- [PULL 02/39] meson.build: Sort sourcesets alphabetically, Paolo Bonzini, 2020/10/10
- [PULL 04/39] chardev: Move the creation of the library to the main meson.build, Paolo Bonzini, 2020/10/10
- [PULL 10/39] hw/nvram: Always register FW_CFG_DATA_GENERATOR_INTERFACE, Paolo Bonzini, 2020/10/10
- [PULL 15/39] docs: Move QTest documentation to its own document, Paolo Bonzini, 2020/10/10
- [PULL 08/39] authz: Move the creation of the library to the main meson.build, Paolo Bonzini, 2020/10/10
- [PULL 16/39] docs/devel/qtest: Include protocol spec in document, Paolo Bonzini, 2020/10/10
- [PULL 06/39] io: Move the creation of the library to the main meson.build, Paolo Bonzini, 2020/10/10
- [PULL 09/39] qom: Move the creation of the library to the main meson.build, Paolo Bonzini, 2020/10/10
- [PULL 07/39] crypto: Move the creation of the library to the main meson.build, Paolo Bonzini, 2020/10/10
- [PULL 11/39] softmmu: move more files to softmmu/, Paolo Bonzini, 2020/10/10
- [PULL 13/39] qom: fix objects with improper parent type,
Paolo Bonzini <=
- [PULL 19/39] docs/devel: update instruction on how to add new unit tests, Paolo Bonzini, 2020/10/10
- [PULL 14/39] configure: fix performance regression due to PIC objects, Paolo Bonzini, 2020/10/10
- [PULL 17/39] docs/devel/qtest: Include libqtest API reference, Paolo Bonzini, 2020/10/10
- [PULL 12/39] exec: split out non-softmmu-specific parts, Paolo Bonzini, 2020/10/10
- [PULL 25/39] device-plug-test: use qtest_qmp to send the device_del command, Paolo Bonzini, 2020/10/10
- [PULL 22/39] qtest: rename qtest_qmp_receive to qtest_qmp_receive_dict, Paolo Bonzini, 2020/10/10
- [PULL 20/39] build-sys: fix git version from -version, Paolo Bonzini, 2020/10/10
- [PULL 18/39] qtest: unify extra_qtest_srcs and extra_qtest_deps, Paolo Bonzini, 2020/10/10
- [PULL 26/39] qtest: switch users back to qtest_qmp_receive, Paolo Bonzini, 2020/10/10
- [PULL 24/39] qtest: remove qtest_qmp_receive_success, Paolo Bonzini, 2020/10/10