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93 lines
2.4 KiB
93 lines
2.4 KiB
use wasmtime::*;
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#[test]
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fn smoke() -> anyhow::Result<()> {
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let store = Store::default();
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let g = Global::new(
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&store,
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GlobalType::new(ValType::I32, Mutability::Const),
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0.into(),
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)?;
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assert_eq!(g.get().i32(), Some(0));
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assert!(g.set(0.into()).is_err());
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let g = Global::new(
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&store,
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GlobalType::new(ValType::I32, Mutability::Const),
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1i32.into(),
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)?;
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assert_eq!(g.get().i32(), Some(1));
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let g = Global::new(
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&store,
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GlobalType::new(ValType::I64, Mutability::Const),
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2i64.into(),
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)?;
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assert_eq!(g.get().i64(), Some(2));
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let g = Global::new(
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&store,
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GlobalType::new(ValType::F32, Mutability::Const),
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3.0f32.into(),
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)?;
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assert_eq!(g.get().f32(), Some(3.0));
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let g = Global::new(
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&store,
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GlobalType::new(ValType::F64, Mutability::Const),
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4.0f64.into(),
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)?;
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assert_eq!(g.get().f64(), Some(4.0));
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Ok(())
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}
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#[test]
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fn mutability() -> anyhow::Result<()> {
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let store = Store::default();
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let g = Global::new(
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&store,
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GlobalType::new(ValType::I32, Mutability::Var),
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0.into(),
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)?;
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assert_eq!(g.get().i32(), Some(0));
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g.set(1.into())?;
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assert_eq!(g.get().i32(), Some(1));
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Ok(())
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}
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// Make sure that a global is still usable after its original instance is
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// dropped. This is a bit of a weird test and really only fails depending on the
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// implementation, but for now should hopefully be resilient enough to catch at
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// least some cases of heap corruption.
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#[test]
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fn use_after_drop() -> anyhow::Result<()> {
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let store = Store::default();
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let module = Module::new(
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&store,
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r#"
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(module
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(global (export "foo") (mut i32) (i32.const 100)))
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"#,
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)?;
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let instance = Instance::new(&module, &[])?;
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let g = instance.get_global("foo").unwrap();
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assert_eq!(g.get().i32(), Some(100));
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g.set(101.into())?;
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drop(instance);
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assert_eq!(g.get().i32(), Some(101));
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Instance::new(&module, &[])?;
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assert_eq!(g.get().i32(), Some(101));
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drop(module);
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assert_eq!(g.get().i32(), Some(101));
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drop(store);
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assert_eq!(g.get().i32(), Some(101));
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// spray some heap values
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let mut x = Vec::new();
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for _ in 0..100 {
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x.push("xy".to_string());
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}
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drop(x);
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assert_eq!(g.get().i32(), Some(101));
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Ok(())
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}
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