drcov parser robustness

[patateqbool]

Hi there!

I’ve been playing with TCG plugin for AFL++ QEMU gerenating drcov files and it appears sometime the column path is empty

Columns: id, base, end, entry, path
0, 0x7fff8000, 0x10007fff8000, 0x0,
1, 0x555555554000, 0x555555d74000, 0x0, /opt/aflplusplus/afl-qemu-trace

I’m not really sure if drcov path column can be empty, but this breaks the drcov parser with the following trace:

Traceback (most recent call last):
  File "/Users/patate/Library/Application Support/Binary Ninja/repositories/community/plugins/gaasedelen_lighthouse/plugins/lighthouse/reader/parsers/drcov.py", line 536, in <module>
    x = DrcovData(argv[1])
        ^^^^^^^^^^^^^^^^^^
  File "/Users/patate/Library/Application Support/Binary Ninja/repositories/community/plugins/gaasedelen_lighthouse/plugins/lighthouse/reader/parsers/drcov.py", line 53, in __init__
    self._parse()
  File "/Users/patate/Library/Application Support/Binary Ninja/repositories/community/plugins/gaasedelen_lighthouse/plugins/lighthouse/reader/parsers/drcov.py", line 133, in _parse
    self._parse_module_table(f)
  File "/Users/patate/Library/Application Support/Binary Ninja/repositories/community/plugins/gaasedelen_lighthouse/plugins/lighthouse/reader/parsers/drcov.py", line 163, in _parse_module_table
    self._parse_module_table_modules(f)
  File "/Users/patate/Library/Application Support/Binary Ninja/repositories/community/plugins/gaasedelen_lighthouse/plugins/lighthouse/reader/parsers/drcov.py", line 276, in _parse_module_table_modules
    module = DrcovModule(f.readline().decode('utf-8').strip(), self.module_table_version)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/patate/Library/Application Support/Binary Ninja/repositories/community/plugins/gaasedelen_lighthouse/plugins/lighthouse/reader/parsers/drcov.py", line 382, in __init__
    self._parse_module(module_data, version)
  File "/Users/patate/Library/Application Support/Binary Ninja/repositories/community/plugins/gaasedelen_lighthouse/plugins/lighthouse/reader/parsers/drcov.py", line 409, in _parse_module
    self._parse_module_v2(data)
  File "/Users/patate/Library/Application Support/Binary Ninja/repositories/community/plugins/gaasedelen_lighthouse/plugins/lighthouse/reader/parsers/drcov.py", line 435, in _parse_module_v2
    self.entry     = int(data[3], 16)
                     ^^^^^^^^^^^^^^^^
ValueError: invalid literal for int() with base 16: '0x0,'

Changing this line to

        #data = module_line.split(", ")
        data = [element.strip() for element in module_line.split(",")]

Allow to support empty path.

I can raise a PR if the proposed fix works for you

Thanks!