wasmtime_wast/
spectest.rs

1use wasmtime::*;
2
3/// Configuration of how spectest primitives work.
4pub struct SpectestConfig {
5    /// Whether or not to have a `shared_memory` definition.
6    pub use_shared_memory: bool,
7    /// Whether or not spectest functions that print things actually print things.
8    pub suppress_prints: bool,
9}
10
11/// Return an instance implementing the "spectest" interface used in the
12/// spec testsuite.
13pub fn link_spectest<T>(
14    linker: &mut Linker<T>,
15    store: &mut Store<T>,
16    config: &SpectestConfig,
17) -> Result<()> {
18    let suppress = config.suppress_prints;
19    linker.func_wrap("spectest", "print", || {})?;
20    linker.func_wrap("spectest", "print_i32", move |val: i32| {
21        if !suppress {
22            println!("{val}: i32")
23        }
24    })?;
25    linker.func_wrap("spectest", "print_i64", move |val: i64| {
26        if !suppress {
27            println!("{val}: i64")
28        }
29    })?;
30    linker.func_wrap("spectest", "print_f32", move |val: f32| {
31        if !suppress {
32            println!("{val}: f32")
33        }
34    })?;
35    linker.func_wrap("spectest", "print_f64", move |val: f64| {
36        if !suppress {
37            println!("{val}: f64")
38        }
39    })?;
40    linker.func_wrap("spectest", "print_i32_f32", move |i: i32, f: f32| {
41        if !suppress {
42            println!("{i}: i32");
43            println!("{f}: f32");
44        }
45    })?;
46    linker.func_wrap("spectest", "print_f64_f64", move |f1: f64, f2: f64| {
47        if !suppress {
48            println!("{f1}: f64");
49            println!("{f2}: f64");
50        }
51    })?;
52
53    let ty = GlobalType::new(ValType::I32, Mutability::Const);
54    let g = Global::new(&mut *store, ty, Val::I32(666))?;
55    linker.define(&mut *store, "spectest", "global_i32", g)?;
56
57    let ty = GlobalType::new(ValType::I64, Mutability::Const);
58    let g = Global::new(&mut *store, ty, Val::I64(666))?;
59    linker.define(&mut *store, "spectest", "global_i64", g)?;
60
61    let ty = GlobalType::new(ValType::F32, Mutability::Const);
62    let g = Global::new(&mut *store, ty, Val::F32(0x4426_a666))?;
63    linker.define(&mut *store, "spectest", "global_f32", g)?;
64
65    let ty = GlobalType::new(ValType::F64, Mutability::Const);
66    let g = Global::new(&mut *store, ty, Val::F64(0x4084_d4cc_cccc_cccd))?;
67    linker.define(&mut *store, "spectest", "global_f64", g)?;
68
69    let ty = TableType::new(RefType::FUNCREF, 10, Some(20));
70    let table = Table::new(&mut *store, ty, Ref::Func(None))?;
71    linker.define(&mut *store, "spectest", "table", table)?;
72
73    let ty = TableType::new64(RefType::FUNCREF, 10, Some(20));
74    let table = Table::new(&mut *store, ty, Ref::Func(None))?;
75    linker.define(&mut *store, "spectest", "table64", table)?;
76
77    let ty = MemoryType::new(1, Some(2));
78    let memory = Memory::new(&mut *store, ty)?;
79    linker.define(&mut *store, "spectest", "memory", memory)?;
80
81    if config.use_shared_memory {
82        let ty = MemoryType::shared(1, 1);
83        let memory = Memory::new(&mut *store, ty)?;
84        linker.define(&mut *store, "spectest", "shared_memory", memory)?;
85    }
86
87    Ok(())
88}
89
90#[cfg(feature = "component-model")]
91pub fn link_component_spectest<T>(linker: &mut component::Linker<T>) -> Result<()> {
92    use std::sync::Arc;
93    use std::sync::atomic::{AtomicU32, Ordering::SeqCst};
94    use wasmtime::component::{Resource, ResourceType};
95
96    let engine = linker.engine().clone();
97    linker
98        .root()
99        .func_wrap("host-echo-u32", |_, v: (u32,)| Ok(v))?;
100    linker
101        .root()
102        .func_wrap("host-return-two", |_, _: ()| Ok((2u32,)))?;
103    let mut i = linker.instance("host")?;
104    i.func_wrap("return-three", |_, _: ()| Ok((3u32,)))?;
105    i.instance("nested")?
106        .func_wrap("return-four", |_, _: ()| Ok((4u32,)))?;
107
108    if !cfg!(miri) {
109        let module = Module::new(
110            &engine,
111            r#"
112                (module
113                    (global (export "g") i32 i32.const 100)
114                    (func (export "f") (result i32) i32.const 101)
115                )
116            "#,
117        )?;
118        i.module("simple-module", &module)?;
119    }
120
121    struct Resource1;
122    struct Resource2;
123
124    #[derive(Default)]
125    struct ResourceState {
126        drops: AtomicU32,
127        last_drop: AtomicU32,
128    }
129
130    let state = Arc::new(ResourceState::default());
131
132    i.resource("resource1", ResourceType::host::<Resource1>(), {
133        let state = state.clone();
134        move |_, rep| {
135            state.drops.fetch_add(1, SeqCst);
136            state.last_drop.store(rep, SeqCst);
137
138            Ok(())
139        }
140    })?;
141    i.resource(
142        "resource2",
143        ResourceType::host::<Resource2>(),
144        |_, _| Ok(()),
145    )?;
146    // Currently the embedder API requires redefining the resource destructor
147    // here despite this being the same type as before, and fixing that is left
148    // for a future refactoring.
149    i.resource(
150        "resource1-again",
151        ResourceType::host::<Resource1>(),
152        |_, _| {
153            panic!("shouldn't be destroyed");
154        },
155    )?;
156
157    i.func_wrap("[constructor]resource1", |_cx, (rep,): (u32,)| {
158        Ok((Resource::<Resource1>::new_own(rep),))
159    })?;
160    i.func_wrap(
161        "[static]resource1.assert",
162        |_cx, (resource, rep): (Resource<Resource1>, u32)| {
163            assert_eq!(resource.rep(), rep);
164            Ok(())
165        },
166    )?;
167    i.func_wrap("[static]resource1.last-drop", {
168        let state = state.clone();
169        move |_, (): ()| Ok((state.last_drop.load(SeqCst),))
170    })?;
171    i.func_wrap("[static]resource1.drops", {
172        let state = state.clone();
173        move |_, (): ()| Ok((state.drops.load(SeqCst),))
174    })?;
175    i.func_wrap(
176        "[method]resource1.simple",
177        |_cx, (resource, rep): (Resource<Resource1>, u32)| {
178            assert!(!resource.owned());
179            assert_eq!(resource.rep(), rep);
180            Ok(())
181        },
182    )?;
183
184    i.func_wrap(
185        "[method]resource1.take-borrow",
186        |_, (a, b): (Resource<Resource1>, Resource<Resource1>)| {
187            assert!(!a.owned());
188            assert!(!b.owned());
189            Ok(())
190        },
191    )?;
192    i.func_wrap(
193        "[method]resource1.take-own",
194        |_cx, (a, b): (Resource<Resource1>, Resource<Resource1>)| {
195            assert!(!a.owned());
196            assert!(b.owned());
197            Ok(())
198        },
199    )?;
200    Ok(())
201}
wasmtime_wast/spectest.rs

wasmtime_wast/
spectest.rs
