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y 2d41e54f14 fuzz: move all artifacts into regressions

Merge the libfuzzer and honggfuzz saved crash inputs into a shared
folder in fuzz/regressions

Add relevant entries to .gitignore

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hfuzz_workspace/serial-decode-string

fuzz: move all artifacts into regressions

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script

fuzz: fix old code comment in script

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src

fuzz: cleanup zkas-compile harness in honggfuzz

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.gitignore

fuzz: move all artifacts into regressions

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Cargo.toml

fuzz: cleanup zkas-compile harness in honggfuzz

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README.md

fuzz: add regressions/ folder; improve READMEs

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README.md

Fuzz2 - honggfuzz

This directory contains files pertaining to fuzz testing with the honggfuzz fuzzer.

We're trying this tool out alongside libfuzzer (covered in darkfi/fuzz/README.md).

Comparison to libfuzzer

Does not halt execution on crashes (can discover multiple crashes in one fuzzing session)
Fewer memory issues (tool less likely to crash, easier to configure)
Better UI

Install

cargo install honggfuzz

Usage

# Build targets from Cargo.toml [[bin]] section
cargo hfuzz build
# Run
cargo hfuzz run zkbinary-decode
# Run `n` threads: brrrrrrrrrrrrr
HFUZZ_RUN_ARGS="-n 24" cargo hfuzz run zkbinary-decode