mirror of
https://github.com/fluencelabs/wasmer
synced 2024-12-13 14:25:32 +00:00
39 lines
1.7 KiB
Markdown
39 lines
1.7 KiB
Markdown
This directory contains the fuzz tests for wasmer. To fuzz, we use the `cargo-fuzz` package.
|
|
|
|
## Installation
|
|
|
|
You may need to install the `cargo-fuzz` package to get the `cargo fuzz` subcommand. Use
|
|
|
|
```sh
|
|
$ cargo install cargo-fuzz
|
|
```
|
|
|
|
`cargo-fuzz` is documented in the [Rust Fuzz Book](https://rust-fuzz.github.io/book/cargo-fuzz.html).
|
|
|
|
## Running a fuzzer
|
|
|
|
Once `cargo-fuzz` is installed, you can run the `simple_instantiate` fuzzer with
|
|
```sh
|
|
cargo fuzz run simple_instantiate
|
|
```
|
|
|
|
You should see output that looks something like this:
|
|
|
|
```
|
|
INFO: Seed: 3276026494
|
|
INFO: 8 files found in wasmer/fuzz/corpus/simple_instantiate
|
|
INFO: -max_len is not provided; libFuzzer will not generate inputs larger than 4096 bytes
|
|
INFO: seed corpus: files: 8 min: 1b max: 1b total: 8b rss: 133Mb
|
|
#9 INITED ft: 3 corp: 3/3b lim: 4 exec/s: 0 rss: 142Mb
|
|
#23 NEW ft: 4 corp: 4/5b lim: 4 exec/s: 0 rss: 142Mb L: 2/2 MS: 4 ChangeByte-InsertByte-ShuffleBytes-ChangeBit-
|
|
#25 NEW ft: 5 corp: 5/6b lim: 4 exec/s: 0 rss: 142Mb L: 1/2 MS: 2 ChangeBinInt-ChangeBit-
|
|
#27 NEW ft: 6 corp: 6/9b lim: 4 exec/s: 0 rss: 142Mb L: 3/3 MS: 2 InsertByte-ChangeByte-
|
|
#190 REDUCE ft: 6 corp: 6/7b lim: 4 exec/s: 0 rss: 142Mb L: 1/2 MS: 3 ChangeBit-EraseBytes-CrossOver-
|
|
#205 REDUCE ft: 7 corp: 7/11b lim: 4 exec/s: 0 rss: 142Mb L: 4/4 MS: 5 ShuffleBytes-CrossOver-InsertByte-ChangeBinInt-CrossOver-
|
|
```
|
|
It will continue to generate random inputs forever, until it finds a bug or is terminated. The testcases for bugs it finds go into `fuzz/artifacts/simple_instantiate` and you can rerun the fuzzer on a single input by passing it on the command line `cargo fuzz run simple_instantiate my_testcase.wasm`.
|
|
|
|
## Trophy case
|
|
|
|
- [x] https://github.com/wasmerio/wasmer/issues/558
|