ntoskrnl.exe: Implement ObGetObjectType.

dlls/ntoskrnl.exe/ntoskrnl.c

@@ -397,6 +397,15 @@ NTSTATUS WINAPI ObReferenceObjectByHandle( HANDLE handle, ACCESS_MASK access,
     return status;
 }
 
+/***********************************************************************
+ *           ObGetObjectType (NTOSKRNL.EXE.@)
+ */
+POBJECT_TYPE WINAPI ObGetObjectType( void *object )
+{
+    struct object_header *header = (struct object_header *)object - 1;
+    return header->type;
+}
+
 
 static void *create_file_object( HANDLE handle );
 
@@ -2793,16 +2802,6 @@ USHORT WINAPI ObGetFilterVersion(void)
 }
 
 /***********************************************************************
- *           ObGetObjectType (NTOSKRNL.EXE.@)
- */
-POBJECT_TYPE WINAPI ObGetObjectType(void *object)
-{
-    FIXME("stub: %p\n", object);
-
-    return NULL;
-}
-
-/***********************************************************************
  *           IoGetAttachedDeviceReference   (NTOSKRNL.EXE.@)
  */
 DEVICE_OBJECT* WINAPI IoGetAttachedDeviceReference( DEVICE_OBJECT *device )

dlls/ntoskrnl.exe/tests/driver.c

@@ -662,10 +662,12 @@ static void WINAPI thread_proc(void *arg)
 
 static void test_ob_reference(const WCHAR *test_path)
 {
+    POBJECT_TYPE (WINAPI *pObGetObjectType)(void*);
     OBJECT_ATTRIBUTES attr = { sizeof(attr) };
     HANDLE event_handle, file_handle, file_handle2, thread_handle;
     FILE_OBJECT *file;
     void *obj1, *obj2;
+    POBJECT_TYPE obj1_type;
     UNICODE_STRING pathU;
     IO_STATUS_BLOCK io;
     WCHAR *tmp_path;
@@ -674,6 +676,10 @@ static void test_ob_reference(const WCHAR *test_path)
 
     static const WCHAR tmpW[] = {'.','t','m','p',0};
 
+    pObGetObjectType = get_proc_address("ObGetObjectType");
+    if (!pObGetObjectType)
+        win_skip("ObGetObjectType not found\n");
+
     InitializeObjectAttributes(&attr, NULL, OBJ_KERNEL_HANDLE, NULL, NULL);
     status = ZwCreateEvent(&event_handle, SYNCHRONIZE, &attr, NotificationEvent, TRUE);
     ok(!status, "ZwCreateEvent failed: %#x\n", status);
@@ -708,6 +714,12 @@ static void test_ob_reference(const WCHAR *test_path)
     status = ObReferenceObjectByHandle(event_handle, SYNCHRONIZE, NULL, KernelMode, &obj1, NULL);
     ok(!status, "ObReferenceObjectByHandle failed: %#x\n", status);
 
+    if (pObGetObjectType)
+    {
+        obj1_type = pObGetObjectType(obj1);
+        ok(obj1_type == *pExEventObjectType, "ObGetObjectType returned %p\n", obj1_type);
+    }
+
     if (sizeof(void *) != 4) /* avoid dealing with fastcall */
     {
         ObfReferenceObject(obj1);