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Split our existing fuzz targets into separate generators and oracles

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Part of #611
This commit is contained in:
Nick Fitzgerald
2019-11-21 14:40:25 -08:00
parent 9658d33b5c
commit 58ba066758
8 changed files with 116 additions and 85 deletions
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8
fuzz/Cargo.toml
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@@ -9,14 +9,10 @@ publish = false
cargo-fuzz = true
[dependencies]
wasmtime-environ = { path = "../crates/environ" }
arbitrary = "0.2.0"
wasmtime-fuzzing = { path = "../crates/fuzzing" }
wasmtime-jit = { path = "../crates/jit" }
cranelift-codegen = "0.50"
cranelift-wasm = "0.50"
cranelift-native = "0.50"
libfuzzer-sys = { git = "https://github.com/rust-fuzz/libfuzzer-sys.git" }
wasmparser = { version = "0.39.2", default-features = false, features = ["core"] }
binaryen = "0.8.1"
# Prevent this from interfering with workspaces
[workspace]

42
fuzz/fuzz_targets/compile.rs
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@@ -2,49 +2,15 @@
extern crate libfuzzer_sys;
use cranelift_codegen::settings;
use libfuzzer_sys::fuzz_target;
use std::cell::RefCell;
use std::collections::HashMap;
use std::rc::Rc;
use wasmparser::validate;
use wasmtime_jit::{CompilationStrategy, CompiledModule, Compiler, NullResolver};
use wasmtime_fuzzing::oracles;
use wasmtime_jit::CompilationStrategy;
fuzz_target!(|data: &[u8]| {
if validate(data, None).is_err() {
return;
}
let flag_builder = settings::builder();
let isa_builder = cranelift_native::builder().unwrap_or_else(|_| {
panic!("host machine is not a supported target");
});
let isa = isa_builder.finish(settings::Flags::new(flag_builder));
let mut compiler = Compiler::new(isa, CompilationStrategy::Cranelift);
let mut resolver = NullResolver {};
let global_exports = Rc::new(RefCell::new(HashMap::new()));
let _compiled =
match CompiledModule::new(&mut compiler, data, &mut resolver, global_exports, false) {
Ok(x) => x,
Err(_) => return,
};
oracles::compile(data, CompilationStrategy::Cranelift);
});
#[cfg(feature = "lightbeam")]
fuzz_target!(|data: &[u8]| {
if validate(data, None).is_err() {
return;
}
let flag_builder = settings::builder();
let isa_builder = cranelift_native::builder().unwrap_or_else(|_| {
panic!("host machine is not a supported target");
});
let isa = isa_builder.finish(settings::Flags::new(flag_builder));
let mut compiler = Compiler::new(isa, CompilationStrategy::Lightbeam);
let mut resolver = NullResolver {};
let global_exports = Rc::new(RefCell::new(HashMap::new()));
let _compiled =
match CompiledModule::new(&mut compiler, data, &mut resolver, global_exports, false) {
Ok(x) => x,
Err(_) => return,
};
oracles::compile(data, CompilationStrategy::Lightbeam);
});

24
fuzz/fuzz_targets/instantiate.rs
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@@ -2,28 +2,10 @@
extern crate libfuzzer_sys;
use cranelift_codegen::settings;
use libfuzzer_sys::fuzz_target;
use wasmparser::validate;
use wasmtime_jit::{instantiate, CompilationStrategy, Compiler, NullResolver};
use wasmtime_fuzzing::oracles;
use wasmtime_jit::{CompilationStrategy};
fuzz_target!(|data: &[u8]| {
if validate(data, None).is_err() {
return;
}
let flag_builder = settings::builder();
let isa_builder = cranelift_native::builder().unwrap_or_else(|_| {
panic!("host machine is not a supported target");
});
let isa = isa_builder.finish(settings::Flags::new(flag_builder));
let mut compiler = Compiler::new(isa, CompilationStrategy::Auto);
let mut imports_resolver = NullResolver {};
let _instance = instantiate(
&mut compiler,
data,
&mut imports_resolver,
Default::default(),
true,
)
.unwrap();
oracles::instantiate(data, CompilationStrategy::Auto);
});

24
fuzz/fuzz_targets/instantiate_translated.rs
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@@ -2,26 +2,10 @@
extern crate libfuzzer_sys;
use cranelift_codegen::settings;
use libfuzzer_sys::fuzz_target;
use wasmtime_jit::{instantiate, CompilationStrategy, Compiler, NullResolver};
use wasmtime_fuzzing::{generators, oracles};
use wasmtime_jit::CompilationStrategy;
fuzz_target!(|data: &[u8]| {
let binaryen_module = binaryen::tools::translate_to_fuzz_mvp(data);
let wasm = binaryen_module.write();
let flag_builder = settings::builder();
let isa_builder = cranelift_native::builder().unwrap_or_else(|_| {
panic!("host machine is not a supported target");
});
let isa = isa_builder.finish(settings::Flags::new(flag_builder));
let mut compiler = Compiler::new(isa, CompilationStrategy::Auto);
let mut imports_resolver = NullResolver {};
let _instance = instantiate(
&mut compiler,
&wasm,
&mut imports_resolver,
Default::default(),
true,
)
.unwrap();
fuzz_target!(|data: generators::WasmOptTtf| {
oracles::instantiate(&data.wasm, CompilationStrategy::Auto);
});