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[fuzz] Add Huffman round trip fuzzer

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* Add a Huffman round trip fuzzer
* Fix two minor bugs in Huffman that aren't exposed in zstd
  - Incorrect weight comparison (weights are allowed to be equal to
    table log).
  - HUF_compress1X_usingCTable_internal() can return compressed
    size >= source size, so the assert that `cSize <= 65535` isn't
    correct, and it needs to be checked instead.
This commit is contained in:
Nick Terrell
2021-08-02 21:02:31 -07:00
parent 46f2710562
commit d8a0797268
7 changed files with 158 additions and 11 deletions
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tests/fuzz/fuzz.py
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@ -63,6 +63,7 @@ TARGET_INFO = {
'fse_read_ncount': TargetInfo(InputType.RAW_DATA),
'sequence_compression_api': TargetInfo(InputType.RAW_DATA),
'seekable_roundtrip': TargetInfo(InputType.RAW_DATA),
'huf_round_trip': TargetInfo(InputType.RAW_DATA),
}
TARGETS = list(TARGET_INFO.keys())
ALL_TARGETS = TARGETS + ['all']