wasmtime_test_util/
component.rs

1use anyhow::Result;
2use arbitrary::Arbitrary;
3use std::mem::MaybeUninit;
4use wasmtime::component::__internal::{
5    CanonicalAbiInfo, InstanceType, InterfaceType, LiftContext, LowerContext,
6};
7use wasmtime::component::{ComponentNamedList, ComponentType, Func, Lift, Lower, TypedFunc, Val};
8use wasmtime::{AsContextMut, Config, Engine};
9
10pub trait TypedFuncExt<P, R> {
11    fn call_and_post_return(&self, store: impl AsContextMut, params: P) -> Result<R>;
12}
13
14impl<P, R> TypedFuncExt<P, R> for TypedFunc<P, R>
15where
16    P: ComponentNamedList + Lower,
17    R: ComponentNamedList + Lift,
18{
19    fn call_and_post_return(&self, mut store: impl AsContextMut, params: P) -> Result<R> {
20        let result = self.call(&mut store, params)?;
21        self.post_return(&mut store)?;
22        Ok(result)
23    }
24}
25
26pub trait FuncExt {
27    fn call_and_post_return(
28        &self,
29        store: impl AsContextMut,
30        params: &[Val],
31        results: &mut [Val],
32    ) -> Result<()>;
33}
34
35impl FuncExt for Func {
36    fn call_and_post_return(
37        &self,
38        mut store: impl AsContextMut,
39        params: &[Val],
40        results: &mut [Val],
41    ) -> Result<()> {
42        self.call(&mut store, params, results)?;
43        self.post_return(&mut store)?;
44        Ok(())
45    }
46}
47
48pub fn config() -> Config {
49    drop(env_logger::try_init());
50
51    let mut config = Config::new();
52    config.wasm_component_model(true);
53
54    // When `WASMTIME_TEST_NO_HOG_MEMORY` is set it means we're in qemu. The
55    // component model tests create a disproportionate number of instances so
56    // try to cut down on virtual memory usage by avoiding 4G reservations.
57    if std::env::var("WASMTIME_TEST_NO_HOG_MEMORY").is_ok() {
58        config.memory_reservation(0);
59        config.memory_guard_size(0);
60    }
61    config
62}
63
64pub fn engine() -> Engine {
65    Engine::new(&config()).unwrap()
66}
67
68pub fn async_engine() -> Engine {
69    let mut config = config();
70    config.async_support(true);
71    Engine::new(&config).unwrap()
72}
73
74/// Newtype wrapper for `f32` whose `PartialEq` impl considers NaNs equal to each other.
75#[derive(Copy, Clone, Debug, Arbitrary)]
76pub struct Float32(pub f32);
77
78/// Newtype wrapper for `f64` whose `PartialEq` impl considers NaNs equal to each other.
79#[derive(Copy, Clone, Debug, Arbitrary)]
80pub struct Float64(pub f64);
81
82macro_rules! forward_impls {
83    ($($a:ty => $b:ty,)*) => ($(
84        unsafe impl ComponentType for $a {
85            type Lower = <$b as ComponentType>::Lower;
86
87            const ABI: CanonicalAbiInfo = <$b as ComponentType>::ABI;
88
89            #[inline]
90            fn typecheck(ty: &InterfaceType, types: &InstanceType<'_>) -> Result<()> {
91                <$b as ComponentType>::typecheck(ty, types)
92            }
93        }
94
95        unsafe impl Lower for $a {
96            fn lower<U>(
97                &self,
98                cx: &mut LowerContext<'_, U>,
99                ty: InterfaceType,
100                dst: &mut MaybeUninit<Self::Lower>,
101            ) -> Result<()> {
102                <$b as Lower>::lower(&self.0, cx, ty, dst)
103            }
104
105            fn store<U>(&self, cx: &mut LowerContext<'_, U>, ty: InterfaceType, offset: usize) -> Result<()> {
106                <$b as Lower>::store(&self.0, cx, ty, offset)
107            }
108        }
109
110        unsafe impl Lift for $a {
111            fn lift(cx: &mut LiftContext<'_>, ty: InterfaceType, src: &Self::Lower) -> Result<Self> {
112                Ok(Self(<$b as Lift>::lift(cx, ty, src)?))
113            }
114
115            fn load(cx: &mut LiftContext<'_>, ty: InterfaceType, bytes: &[u8]) -> Result<Self> {
116                Ok(Self(<$b as Lift>::load(cx, ty, bytes)?))
117            }
118        }
119
120        impl PartialEq for $a {
121            fn eq(&self, other: &Self) -> bool {
122                self.0 == other.0 || (self.0.is_nan() && other.0.is_nan())
123            }
124        }
125    )*)
126}
127
128forward_impls! {
129    Float32 => f32,
130    Float64 => f64,
131}
wasmtime_test_util/component.rs

wasmtime_test_util/
component.rs
