Klever

Sometimes LKVOG fails with error messages like this:

[AVODG1] Raise exception:
Traceback (most recent call last):
  File "/home/debian/klever/core/core/components.py", line 413, in run
    self.main()
  File "/home/debian/klever/core/core/components.py", line 320, in callbacks_caller
    ret = attr(*args, **kwargs)
  File "/home/debian/klever/core/core/components.py", line 318, in callbacks_caller
    ret = attr(*args[1:], **kwargs)
  File "/home/debian/klever/core/core/lkvog/__init__.py", line 287, in generate_all_verification_obj_descs
    self.generate_verification_obj_desc()
  File "/home/debian/klever/core/core/components.py", line 320, in callbacks_caller
    ret = attr(*args, **kwargs)
  File "/home/debian/klever/core/core/lkvog/__init__.py", line 319, in generate_verification_obj_desc
    cc_full_desc_files = self.__find_cc_full_desc_files(module.id)
  File "/home/debian/klever/core/core/lkvog/__init__.py", line 458, in __find_cc_full_desc_files
    cc_full_desc_files.extend(self.__find_cc_full_desc_files(in_file))
  File "/home/debian/klever/core/core/lkvog/__init__.py", line 444, in __find_cc_full_desc_files
    out_file_desc = self.linux_kernel_build_cmd_out_file_desc[out_file][-1]
  File "<string>", line 2, in __getitem__
  File "/usr/lib/python3.5/multiprocessing/managers.py", line 732, in _callmethod
    raise convert_to_error(kind, result)
KeyError: 'drivers/hid/.tmp_hid-gyration.o'

First of all I suppose to avoid treating such the errors as critical ones since often just a couple of verification objects couldn't be generated while thousands ones could be. Later we will be able to create notes for these warnings to attract user attention (#8529).

Also, such error messages provide very little information for following debugging. So, it can take much additional time to identify corresponding issues. I suppose to at least show in error messages some information on all build commands participating in failed generation of verification objects. For instance, generate verification object drivers/hid/hid-gyration.ko, find out CC build commands for drivers/hid/hid-gyration.o and so on. Besides, it would be great to remember and to show all other build command consumers. For instance, CC build commands for drivers/hid/hid-gyration.o were found out earlier when generating verification object drivers/hid/hid.ko.