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janet/tools/afl/README.md
2020-04-05 23:05:18 +12:00

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# AFL Fuzzing scripts
To use these, you need to install afl (of course), and xterm. A tiling window manager helps manage
many concurrent fuzzer instances.
Note, afl sometimes requires system configuration, if you find AFL quitting prematurely, try manually
launching it and addressing any error messages.
## Fuzz the parser
```
$ sh ./tools/afl/prepare_to_fuzz.sh
$ export NFUZZ=1
$ sh ./tools/afl/fuzz.sh parser
Ctrl+C when done to close all fuzzer terminals.
$ sh ./tools/afl/aggregate_cases.sh parser
$ ls ./fuzz_out/parser_aggregated/
```
## Fuzz the unmarshaller
```
$ janet ./tools/afl/generate_unmarshal_testcases.janet
$ sh ./tools/afl/prepare_to_fuzz.sh
$ export NFUZZ=1
$ sh ./tools/afl/fuzz.sh unmarshal
Ctrl+C when done to close all fuzzer terminals.
$ sh ./tools/afl/aggregate_cases.sh unmarshal
$ ls ./fuzz_out/unmarshal_aggregated/
```