bab59a2cd2
When the test case that causes the failure can successfully be disassembled to
WAT, we get logs like this:
```
[2019-11-26T18:48:46Z INFO wasmtime_fuzzing] Wrote WAT disassembly to: /home/fitzgen/wasmtime/crates/fuzzing/target/scratch/8437-0.wat
[2019-11-26T18:48:46Z INFO wasmtime_fuzzing] If this fuzz test fails, copy `/home/fitzgen/wasmtime/crates/fuzzing/target/scratch/8437-0.wat` to `wasmtime/crates/fuzzing/tests/regressions/my-regression.wat` and add the following test to `wasmtime/crates/fuzzing/tests/regressions.rs`:
```
#[test]
fn my_fuzzing_regression_test() {
let data = wat::parse_str(
include_str!("./regressions/my-regression.wat")
).unwrap();
oracles::instantiate(data, CompilationStrategy::Auto)
}
```
```
If the test case cannot be disassembled to WAT, then we get logs like this:
```
[2019-11-26T18:48:46Z INFO wasmtime_fuzzing] Wrote Wasm test case to: /home/fitzgen/wasmtime/crates/fuzzing/target/scratch/8437-0.wasm
[2019-11-26T18:48:46Z INFO wasmtime_fuzzing] Failed to disassemble Wasm into WAT:
Bad magic number (at offset 0)
Stack backtrace:
Run with RUST_LIB_BACKTRACE=1 env variable to display a backtrace
[2019-11-26T18:48:46Z INFO wasmtime_fuzzing] If this fuzz test fails, copy `/home/fitzgen/wasmtime/crates/fuzzing/target/scratch/8437-0.wasm` to `wasmtime/crates/fuzzing/tests/regressions/my-regression.wasm` and add the following test to `wasmtime/crates/fuzzing/tests/regressions.rs`:
```
#[test]
fn my_fuzzing_regression_test() {
let data = include_bytes!("./regressions/my-regression.wasm");
oracles::instantiate(data, CompilationStrategy::Auto)
}
```
```
22 lines
558 B
TOML
22 lines
558 B
TOML
[package]
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authors = ["The Wasmtime Project Developers"]
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description = "Fuzzing infrastructure for Wasmtime"
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edition = "2018"
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name = "wasmtime-fuzzing"
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publish = false
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version = "0.1.0"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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anyhow = "1.0.22"
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arbitrary = "0.2.0"
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binaryen = "0.8.2"
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cranelift-codegen = "0.50.0"
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cranelift-native = "0.50.0"
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env_logger = { version = "0.7.1", optional = true }
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log = "0.4.8"
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wasmparser = "0.42.1"
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wasmprinter = "0.2.0"
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wasmtime-jit = { path = "../jit" }
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