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# autotokens
This implements an improved autotoken grammar fuzzing idea presented in
[Token-Level Fuzzing][https://www.usenix.org/system/files/sec21-salls.pdf].
It is a grammar fuzzer without actually knowing the grammar.
It is recommended to run with together in an instance with `CMPLOG`.
If you have a dictionary (`-x`) this improves this custom grammar mutator.
If **not** running with `CMPLOG`, it is possible to set
`AFL_CUSTOM_MUTATOR_ONLY` to concentrate on grammar bug classes.
## Configuration via environment variables
`AUTOTOKENS_ONLY_FAV` - only use this mutator on favorite queue items
`AUTOTOKENS_COMMENT` - what character or string starts a comment which will be
removed. Default: `/* ... */`
`AUTOTOKENS_ALTERNATIVE_TOKENIZE` - use an alternative tokenize implementation
(experimental)
`AUTOTOKENS_WHITESPACE` - whitespace string to use for ALTERNATIVE_TOKENIZE,
default is " "
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