fuzz: fuzz testing (tikv#2942)

.gitignore

@@ -23,4 +23,8 @@ out/
 
 target
 tmp
-/bin
+/bin
+
+# Cargo-fuzz
+corpus
+artifacts

Cargo.toml

@@ -108,6 +108,9 @@ features = ["secure"]
 [replace]
 "protobuf:1.4.1" = { git = "https://github.com/stepancheg/rust-protobuf.git" }
 
+[workspace]
+members = ["fuzz"]
+
 [profile.dev]
 opt-level = 0  # Controls the --opt-level the compiler builds with
 debug = true   # Controls whether the compiler passes `-g`

fuzz/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "tikv-fuzz"
+version = "0.0.1"
+publish = false
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies.tikv]
+path = ".."
+[dependencies.libfuzzer-sys]
+git = "https://github.com/rust-fuzz/libfuzzer-sys.git"
+
+[[bin]]
+name = "codec_bytes"
+path = "fuzz_targets/codec_bytes.rs"

fuzz/README.md

@@ -0,0 +1,19 @@
+# Fuzz testing
+
+Fuzz testing for TiKV.
+
+Currently, it targets in following components:
+
+ - tikv::util::codec::bytes
+
+To run fuzz testing, you need to install `cargo-fuzz`:
+
+```sh
+$ cargo install cargo-fuzz
+```
+
+Then pick a target:
+
+```sh
+$ cargo fuzz run codec_bytes
+```

fuzz/fuzz_targets/codec_bytes.rs

@@ -0,0 +1,14 @@
+#![no_main]
+#[macro_use]
+extern crate libfuzzer_sys;
+extern crate tikv;
+
+fuzz_target!(|data: &[u8]| {
+    use tikv::util::codec;
+
+    let _ = codec::bytes::encode_bytes(data);
+    let _ = codec::bytes::encode_bytes_desc(data);
+    let _ = codec::bytes::encoded_compact_len(data);
+    let _ = codec::bytes::encoded_bytes_len(data, true);
+    let _ = codec::bytes::encoded_bytes_len(data, false);
+});