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Add simple fuzzing
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Add infrastructure to automatically run fuzzers in CI,
and implement a simple fuzzing test based on triggering all (most)
public APIs in a randimized way.

As far as I was able to try it catches the previous unsoundness issues
in a matter of seconds. This can be tried by changing the `path = "../"` dependency to
`version = "=0.6.3"` etc. and running the fuzzer manually. (Note: You'll need
to tweak the `Cargo.lock` to allow downloading the yanked versions).

Related to #124
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dpc committed Oct 30, 2019
1 parent 31cfc59 commit eb094d6
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2 changes: 1 addition & 1 deletion .gitignore
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target
Cargo.lock
./Cargo.lock
34 changes: 28 additions & 6 deletions .travis.yml
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language: rust
rust:
- 1.36.0
- nightly
- beta
- stable
addons:
apt:
update: true
packages:
- binutils-dev
- libunwind8-dev
- libcurl4-openssl-dev
- libelf-dev
- libdw-dev
- cmake
- gcc
- libiberty-dev
matrix:
include:
- rust: 1.36.0
- rust: nightly
- rust: beta
env: DO_FUZZ=true
- rust: stable
env: DO_FUZZ=true
script: |
cargo build --verbose &&
cargo test --verbose &&
Expand All @@ -12,4 +27,11 @@ script: |
([ $TRAVIS_RUST_VERSION != nightly ] || cargo test --verbose --features union) &&
([ $TRAVIS_RUST_VERSION != nightly ] || cargo test --verbose --all-features) &&
([ $TRAVIS_RUST_VERSION != nightly ] || cargo bench --verbose bench) &&
([ $TRAVIS_RUST_VERSION != nightly ] || bash ./scripts/run_miri.sh)
([ $TRAVIS_RUST_VERSION != nightly ] || bash ./scripts/run_miri.sh) &&
if [ "$DO_FUZZ" = true ]
then
(
cd fuzz
./travis-fuzz.sh
)
fi
192 changes: 192 additions & 0 deletions fuzz/Cargo.lock

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26 changes: 26 additions & 0 deletions fuzz/Cargo.toml
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[package]
name = "smallvec-fuzz"
version = "0.1.0"
authors = ["Dawid Ciężarkiewicz <[email protected]>"]
edition = "2018"
publish = false

[package.metadata]
cargo-fuzz = true

[features]
afl_fuzz = ["afl"]
honggfuzz_fuzz = ["honggfuzz"]


[dependencies]
honggfuzz = { version = "0.5.45", optional = true }
afl = { version = "0.4", optional = true }
smallvec = { path = ".." }

[workspace]
members = ["."]

[[bin]]
name = "smallvec_ops"
path = "fuzz_targets/smallvec_ops.rs"
12 changes: 12 additions & 0 deletions fuzz/README.md
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# Fuzzer for smallvec

Based on fuzzing in [rust-bitcoin](https://github.com/rust-bitcoin/rust-bitcoin/tree/c8ac25219a09bf9d017f1b05abe3e746e2136f73/fuzz)

## Running manually with afl

```
cargo afl build --release --bin smallvec_ops --features afl && cargo afl fuzz -i in -o out target/release/smallvec_ops
```

# Useful links:
* https://rust-fuzz.github.io/book/afl.html
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