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wasmtime/tests/all/func.rs
Alex Crichton bcf3544924 Optimize Func::call and its C API (#3319) 
* Optimize `Func::call` and its C API

This commit is an alternative to #3298 which achieves effectively the
same goal of optimizing the `Func::call` API as well as its C API
sibling of `wasmtime_func_call`. The strategy taken here is different
than #3298 though where a new API isn't created, rather a small tweak to
an existing API is done. Specifically this commit handles the major
sources of slowness with `Func::call` with:

* Looking up the type of a function, to typecheck the arguments with and
  use to guide how the results should be loaded, no longer hits the
  rwlock in the `Engine` but instead each `Func` contains its own
  `FuncType`. This can be an unnecessary allocation for funcs not used
  with `Func::call`, so this is a downside of this implementation
  relative to #3298. A mitigating factor, though, is that instance
  exports are loaded lazily into the `Store` and in theory not too many
  funcs are active in the store as `Func` objects.

* Temporary storage is amortized with a long-lived `Vec` in the `Store`
  rather than allocating a new vector on each call. This is basically
  the same strategy as #3294 only applied to different types in
  different places. Specifically `wasmtime::Store` now retains a
  `Vec<u128>` for `Func::call`, and the C API retains a `Vec<Val>` for
  calling `Func::call`.

* Finally, an API breaking change is made to `Func::call` and its type
  signature (as well as `Func::call_async`). Instead of returning
  `Box<[Val]>` as it did before this function now takes a
  `results: &mut [Val]` parameter. This allows the caller to manage the
  allocation and we can amortize-remove it in `wasmtime_func_call` by
  using space after the parameters in the `Vec<Val>` we're passing in.
  This change is naturally a breaking change and we'll want to consider
  it carefully, but mitigating factors are that most embeddings are
  likely using `TypedFunc::call` instead and this signature taking a
  mutable slice better aligns with `Func::new` which receives a mutable
  slice for the results.

Overall this change, in the benchmark of "call a nop function from the C
API" is not quite as good as #3298. It's still a bit slower, on the
order of 15ns, because there's lots of capacity checks around vectors
and the type checks are slightly less optimized than before. Overall
though this is still significantly better than today because allocations
and the rwlock to acquire the type information are both avoided. I
personally feel that this change is the best to do because it has less
of an API impact than #3298.

* Rebase issues
2021-09-21 14:07:05 -05:00

938 lines
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use anyhow::Result;
use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering::SeqCst};
use std::sync::Arc;
use wasmtime::*;
#[test]
fn func_constructors() {
let mut store = Store::<()>::default();
Func::wrap(&mut store, || {});
Func::wrap(&mut store, |_: i32| {});
Func::wrap(&mut store, |_: i32, _: i64| {});
Func::wrap(&mut store, |_: f32, _: f64| {});
Func::wrap(&mut store, || -> i32 { 0 });
Func::wrap(&mut store, || -> i64 { 0 });
Func::wrap(&mut store, || -> f32 { 0.0 });
Func::wrap(&mut store, || -> f64 { 0.0 });
Func::wrap(&mut store, || -> Option<ExternRef> { None });
Func::wrap(&mut store, || -> Option<Func> { None });
Func::wrap(&mut store, || -> Result<(), Trap> { loop {} });
Func::wrap(&mut store, || -> Result<i32, Trap> { loop {} });
Func::wrap(&mut store, || -> Result<i64, Trap> { loop {} });
Func::wrap(&mut store, || -> Result<f32, Trap> { loop {} });
Func::wrap(&mut store, || -> Result<f64, Trap> { loop {} });
Func::wrap(&mut store, || -> Result<Option<ExternRef>, Trap> {
loop {}
});
Func::wrap(&mut store, || -> Result<Option<Func>, Trap> { loop {} });
}
#[test]
fn dtor_runs() {
static HITS: AtomicUsize = AtomicUsize::new(0);
struct A;
impl Drop for A {
fn drop(&mut self) {
HITS.fetch_add(1, SeqCst);
}
}
let mut store = Store::<()>::default();
let a = A;
assert_eq!(HITS.load(SeqCst), 0);
Func::wrap(&mut store, move || {
drop(&a);
});
drop(store);
assert_eq!(HITS.load(SeqCst), 1);
}
#[test]
fn dtor_delayed() -> Result<()> {
static HITS: AtomicUsize = AtomicUsize::new(0);
struct A;
impl Drop for A {
fn drop(&mut self) {
HITS.fetch_add(1, SeqCst);
}
}
let mut store = Store::<()>::default();
let a = A;
let func = Func::wrap(&mut store, move || drop(&a));
assert_eq!(HITS.load(SeqCst), 0);
let wasm = wat::parse_str(r#"(import "" "" (func))"#)?;
let module = Module::new(store.engine(), &wasm)?;
let _instance = Instance::new(&mut store, &module, &[func.into()])?;
assert_eq!(HITS.load(SeqCst), 0);
drop(store);
assert_eq!(HITS.load(SeqCst), 1);
Ok(())
}
#[test]
fn signatures_match() {
let mut store = Store::<()>::default();
let f = Func::wrap(&mut store, || {});
assert_eq!(f.ty(&store).params().collect::<Vec<_>>(), &[]);
assert_eq!(f.ty(&store).results().collect::<Vec<_>>(), &[]);
let f = Func::wrap(&mut store, || -> i32 { loop {} });
assert_eq!(f.ty(&store).params().collect::<Vec<_>>(), &[]);
assert_eq!(f.ty(&store).results().collect::<Vec<_>>(), &[ValType::I32]);
let f = Func::wrap(&mut store, || -> i64 { loop {} });
assert_eq!(f.ty(&store).params().collect::<Vec<_>>(), &[]);
assert_eq!(f.ty(&store).results().collect::<Vec<_>>(), &[ValType::I64]);
let f = Func::wrap(&mut store, || -> f32 { loop {} });
assert_eq!(f.ty(&store).params().collect::<Vec<_>>(), &[]);
assert_eq!(f.ty(&store).results().collect::<Vec<_>>(), &[ValType::F32]);
let f = Func::wrap(&mut store, || -> f64 { loop {} });
assert_eq!(f.ty(&store).params().collect::<Vec<_>>(), &[]);
assert_eq!(f.ty(&store).results().collect::<Vec<_>>(), &[ValType::F64]);
let f = Func::wrap(
&mut store,
|_: f32, _: f64, _: i32, _: i64, _: i32, _: Option<ExternRef>, _: Option<Func>| -> f64 {
loop {}
},
);
assert_eq!(
f.ty(&store).params().collect::<Vec<_>>(),
&[
ValType::F32,
ValType::F64,
ValType::I32,
ValType::I64,
ValType::I32,
ValType::ExternRef,
ValType::FuncRef,
]
);
assert_eq!(f.ty(&store).results().collect::<Vec<_>>(), &[ValType::F64]);
}
#[test]
fn import_works() -> Result<()> {
static HITS: AtomicUsize = AtomicUsize::new(0);
let wasm = wat::parse_str(
r#"
(import "" "" (func))
(import "" "" (func (param i32) (result i32)))
(import "" "" (func (param i32) (param i64)))
(import "" "" (func (param i32 i64 i32 f32 f64 externref funcref)))
(func (export "run") (param externref funcref)
call 0
i32.const 0
call 1
i32.const 1
i32.add
i64.const 3
call 2
i32.const 100
i64.const 200
i32.const 300
f32.const 400
f64.const 500
local.get 0
local.get 1
call 3
)
"#,
)?;
let mut config = Config::new();
config.wasm_reference_types(true);
let engine = Engine::new(&config)?;
let mut store = Store::new(&engine, ());
let module = Module::new(&engine, &wasm)?;
let imports = [
Func::wrap(&mut store, || {
assert_eq!(HITS.fetch_add(1, SeqCst), 0);
})
.into(),
Func::wrap(&mut store, |x: i32| -> i32 {
assert_eq!(x, 0);
assert_eq!(HITS.fetch_add(1, SeqCst), 1);
1
})
.into(),
Func::wrap(&mut store, |x: i32, y: i64| {
assert_eq!(x, 2);
assert_eq!(y, 3);
assert_eq!(HITS.fetch_add(1, SeqCst), 2);
})
.into(),
Func::wrap(
&mut store,
|mut caller: Caller<'_, ()>,
a: i32,
b: i64,
c: i32,
d: f32,
e: f64,
f: Option<ExternRef>,
g: Option<Func>| {
assert_eq!(a, 100);
assert_eq!(b, 200);
assert_eq!(c, 300);
assert_eq!(d, 400.0);
assert_eq!(e, 500.0);
assert_eq!(
f.as_ref().unwrap().data().downcast_ref::<String>().unwrap(),
"hello"
);
let mut results = [Val::I32(0)];
g.as_ref()
.unwrap()
.call(&mut caller, &[], &mut results)
.unwrap();
assert_eq!(results[0].unwrap_i32(), 42);
assert_eq!(HITS.fetch_add(1, SeqCst), 3);
},
)
.into(),
];
let instance = Instance::new(&mut store, &module, &imports)?;
let run = instance.get_func(&mut store, "run").unwrap();
let funcref = Val::FuncRef(Some(Func::wrap(&mut store, || -> i32 { 42 })));
run.call(
&mut store,
&[
Val::ExternRef(Some(ExternRef::new("hello".to_string()))),
funcref,
],
&mut [],
)?;
assert_eq!(HITS.load(SeqCst), 4);
Ok(())
}
#[test]
fn trap_smoke() -> Result<()> {
let mut store = Store::<()>::default();
let f = Func::wrap(&mut store, || -> Result<(), Trap> {
Err(Trap::new("test"))
});
let err = f
.call(&mut store, &[], &mut [])
.unwrap_err()
.downcast::<Trap>()?;
assert!(err.to_string().contains("test"));
assert!(err.i32_exit_status().is_none());
Ok(())
}
#[test]
fn trap_import() -> Result<()> {
let wasm = wat::parse_str(
r#"
(import "" "" (func))
(start 0)
"#,
)?;
let mut store = Store::<()>::default();
let module = Module::new(store.engine(), &wasm)?;
let import = Func::wrap(&mut store, || -> Result<(), Trap> { Err(Trap::new("foo")) });
let trap = Instance::new(&mut store, &module, &[import.into()])
.err()
.unwrap()
.downcast::<Trap>()?;
assert!(trap.to_string().contains("foo"));
Ok(())
}
#[test]
fn get_from_wrapper() {
let mut store = Store::<()>::default();
let f = Func::wrap(&mut store, || {});
assert!(f.typed::<(), (), _>(&store).is_ok());
assert!(f.typed::<(), i32, _>(&store).is_err());
assert!(f.typed::<(), (), _>(&store).is_ok());
assert!(f.typed::<i32, (), _>(&store).is_err());
assert!(f.typed::<i32, i32, _>(&store).is_err());
assert!(f.typed::<(i32, i32), (), _>(&store).is_err());
assert!(f.typed::<(i32, i32), i32, _>(&store).is_err());
let f = Func::wrap(&mut store, || -> i32 { loop {} });
assert!(f.typed::<(), i32, _>(&store).is_ok());
let f = Func::wrap(&mut store, || -> f32 { loop {} });
assert!(f.typed::<(), f32, _>(&store).is_ok());
let f = Func::wrap(&mut store, || -> f64 { loop {} });
assert!(f.typed::<(), f64, _>(&store).is_ok());
let f = Func::wrap(&mut store, || -> Option<ExternRef> { loop {} });
assert!(f.typed::<(), Option<ExternRef>, _>(&store).is_ok());
let f = Func::wrap(&mut store, || -> Option<Func> { loop {} });
assert!(f.typed::<(), Option<Func>, _>(&store).is_ok());
let f = Func::wrap(&mut store, |_: i32| {});
assert!(f.typed::<i32, (), _>(&store).is_ok());
assert!(f.typed::<i64, (), _>(&store).is_err());
assert!(f.typed::<f32, (), _>(&store).is_err());
assert!(f.typed::<f64, (), _>(&store).is_err());
let f = Func::wrap(&mut store, |_: i64| {});
assert!(f.typed::<i64, (), _>(&store).is_ok());
let f = Func::wrap(&mut store, |_: f32| {});
assert!(f.typed::<f32, (), _>(&store).is_ok());
let f = Func::wrap(&mut store, |_: f64| {});
assert!(f.typed::<f64, (), _>(&store).is_ok());
let f = Func::wrap(&mut store, |_: Option<ExternRef>| {});
assert!(f.typed::<Option<ExternRef>, (), _>(&store).is_ok());
let f = Func::wrap(&mut store, |_: Option<Func>| {});
assert!(f.typed::<Option<Func>, (), _>(&store).is_ok());
}
#[test]
fn get_from_signature() {
let mut store = Store::<()>::default();
let ty = FuncType::new(None, None);
let f = Func::new(&mut store, ty, |_, _, _| panic!());
assert!(f.typed::<(), (), _>(&store).is_ok());
assert!(f.typed::<(), i32, _>(&store).is_err());
assert!(f.typed::<i32, (), _>(&store).is_err());
let ty = FuncType::new(Some(ValType::I32), Some(ValType::F64));
let f = Func::new(&mut store, ty, |_, _, _| panic!());
assert!(f.typed::<(), (), _>(&store).is_err());
assert!(f.typed::<(), i32, _>(&store).is_err());
assert!(f.typed::<i32, (), _>(&store).is_err());
assert!(f.typed::<i32, f64, _>(&store).is_ok());
}
#[test]
fn get_from_module() -> anyhow::Result<()> {
let mut store = Store::<()>::default();
let module = Module::new(
store.engine(),
r#"
(module
(func (export "f0"))
(func (export "f1") (param i32))
(func (export "f2") (result i32)
i32.const 0)
)
"#,
)?;
let instance = Instance::new(&mut store, &module, &[])?;
let f0 = instance.get_func(&mut store, "f0").unwrap();
assert!(f0.typed::<(), (), _>(&store).is_ok());
assert!(f0.typed::<(), i32, _>(&store).is_err());
let f1 = instance.get_func(&mut store, "f1").unwrap();
assert!(f1.typed::<(), (), _>(&store).is_err());
assert!(f1.typed::<i32, (), _>(&store).is_ok());
assert!(f1.typed::<i32, f32, _>(&store).is_err());
let f2 = instance.get_func(&mut store, "f2").unwrap();
assert!(f2.typed::<(), (), _>(&store).is_err());
assert!(f2.typed::<(), i32, _>(&store).is_ok());
assert!(f2.typed::<i32, (), _>(&store).is_err());
assert!(f2.typed::<i32, f32, _>(&store).is_err());
Ok(())
}
#[test]
fn call_wrapped_func() -> Result<()> {
let mut store = Store::<()>::default();
let f = Func::wrap(&mut store, |a: i32, b: i64, c: f32, d: f64| {
assert_eq!(a, 1);
assert_eq!(b, 2);
assert_eq!(c, 3.0);
assert_eq!(d, 4.0);
});
f.call(
&mut store,
&[Val::I32(1), Val::I64(2), 3.0f32.into(), 4.0f64.into()],
&mut [],
)?;
f.typed::<(i32, i64, f32, f64), (), _>(&store)?
.call(&mut store, (1, 2, 3.0, 4.0))?;
let mut results = [Val::I32(0)];
let f = Func::wrap(&mut store, || 1i32);
f.call(&mut store, &[], &mut results)?;
assert_eq!(results[0].unwrap_i32(), 1);
assert_eq!(f.typed::<(), i32, _>(&store)?.call(&mut store, ())?, 1);
let f = Func::wrap(&mut store, || 2i64);
f.call(&mut store, &[], &mut results)?;
assert_eq!(results[0].unwrap_i64(), 2);
assert_eq!(f.typed::<(), i64, _>(&store)?.call(&mut store, ())?, 2);
let f = Func::wrap(&mut store, || 3.0f32);
f.call(&mut store, &[], &mut results)?;
assert_eq!(results[0].unwrap_f32(), 3.0);
assert_eq!(f.typed::<(), f32, _>(&store)?.call(&mut store, ())?, 3.0);
let f = Func::wrap(&mut store, || 4.0f64);
f.call(&mut store, &[], &mut results)?;
assert_eq!(results[0].unwrap_f64(), 4.0);
assert_eq!(f.typed::<(), f64, _>(&store)?.call(&mut store, ())?, 4.0);
Ok(())
}
#[test]
fn caller_memory() -> anyhow::Result<()> {
let mut store = Store::<()>::default();
let f = Func::wrap(&mut store, |mut c: Caller<'_, ()>| {
assert!(c.get_export("x").is_none());
assert!(c.get_export("y").is_none());
assert!(c.get_export("z").is_none());
});
f.call(&mut store, &[], &mut [])?;
let f = Func::wrap(&mut store, |mut c: Caller<'_, ()>| {
assert!(c.get_export("x").is_none());
});
let module = Module::new(
store.engine(),
r#"
(module
(import "" "" (func $f))
(start $f)
)
"#,
)?;
Instance::new(&mut store, &module, &[f.into()])?;
let f = Func::wrap(&mut store, |mut c: Caller<'_, ()>| {
assert!(c.get_export("memory").is_some());
});
let module = Module::new(
store.engine(),
r#"
(module
(import "" "" (func $f))
(memory (export "memory") 1)
(start $f)
)
"#,
)?;
Instance::new(&mut store, &module, &[f.into()])?;
let f = Func::wrap(&mut store, |mut c: Caller<'_, ()>| {
assert!(c.get_export("m").is_some());
assert!(c.get_export("f").is_some());
assert!(c.get_export("g").is_none());
assert!(c.get_export("t").is_none());
});
let module = Module::new(
store.engine(),
r#"
(module
(import "" "" (func $f))
(memory (export "m") 1)
(func (export "f"))
(global (export "g") i32 (i32.const 0))
(table (export "t") 1 funcref)
(start $f)
)
"#,
)?;
Instance::new(&mut store, &module, &[f.into()])?;
Ok(())
}
#[test]
fn func_write_nothing() -> anyhow::Result<()> {
let mut store = Store::<()>::default();
let ty = FuncType::new(None, Some(ValType::I32));
let f = Func::new(&mut store, ty, |_, _, _| Ok(()));
let err = f
.call(&mut store, &[], &mut [Val::I32(0)])
.unwrap_err()
.downcast::<Trap>()?;
assert!(err
.to_string()
.contains("function attempted to return an incompatible value"));
Ok(())
}
#[test]
fn return_cross_store_value() -> anyhow::Result<()> {
let wasm = wat::parse_str(
r#"
(import "" "" (func (result funcref)))
(func (export "run") (result funcref)
call 0
)
"#,
)?;
let mut config = Config::new();
config.wasm_reference_types(true);
let engine = Engine::new(&config)?;
let module = Module::new(&engine, &wasm)?;
let mut store1 = Store::new(&engine, ());
let mut store2 = Store::new(&engine, ());
let store2_func = Func::wrap(&mut store2, || {});
let return_cross_store_func = Func::wrap(&mut store1, move || Some(store2_func.clone()));
let instance = Instance::new(&mut store1, &module, &[return_cross_store_func.into()])?;
let run = instance.get_func(&mut store1, "run").unwrap();
let result = run.call(&mut store1, &[], &mut [Val::I32(0)]);
assert!(result.is_err());
assert!(result.unwrap_err().to_string().contains("cross-`Store`"));
Ok(())
}
#[test]
fn pass_cross_store_arg() -> anyhow::Result<()> {
let mut config = Config::new();
config.wasm_reference_types(true);
let engine = Engine::new(&config)?;
let mut store1 = Store::new(&engine, ());
let mut store2 = Store::new(&engine, ());
let store1_func = Func::wrap(&mut store1, |_: Option<Func>| {});
let store2_func = Func::wrap(&mut store2, || {});
// Using regular `.call` fails with cross-Store arguments.
assert!(store1_func
.call(
&mut store1,
&[Val::FuncRef(Some(store2_func.clone()))],
&mut []
)
.is_err());
// And using `.get` followed by a function call also fails with cross-Store
// arguments.
let f = store1_func.typed::<Option<Func>, (), _>(&store1)?;
let result = f.call(&mut store1, Some(store2_func));
assert!(result.is_err());
assert!(result.unwrap_err().to_string().contains("cross-`Store`"));
Ok(())
}
#[test]
#[cfg_attr(feature = "old-x86-backend", ignore)]
fn externref_signature_no_reference_types() -> anyhow::Result<()> {
let mut config = Config::new();
config.wasm_reference_types(false);
let mut store = Store::new(&Engine::new(&config)?, ());
Func::wrap(&mut store, |_: Option<Func>| {});
Func::new(
&mut store,
FuncType::new(
[ValType::FuncRef, ValType::ExternRef].iter().cloned(),
[ValType::FuncRef, ValType::ExternRef].iter().cloned(),
),
|_, _, _| Ok(()),
);
Ok(())
}
#[test]
fn trampolines_always_valid() -> anyhow::Result<()> {
// Compile two modules up front
let mut store = Store::<()>::default();
let module1 = Module::new(store.engine(), "(module (import \"\" \"\" (func)))")?;
let module2 = Module::new(store.engine(), "(module (func (export \"\")))")?;
// Start instantiating the first module, but this will fail.
// Historically this registered the module's trampolines with `Store`
// before the failure, but then after the failure the `Store` didn't
// hold onto the trampoline.
drop(Instance::new(&mut store, &module1, &[]));
drop(module1);
// Then instantiate another module which has the same function type (no
// parameters or results) which tries to use the trampoline defined in
// the previous module. Then we extract the function and, after we drop the
// module's reference, we call the func.
let i = Instance::new(&mut store, &module2, &[])?;
let func = i.get_func(&mut store, "").unwrap();
drop(module2);
// ... and no segfaults! right? right? ...
func.call(&mut store, &[], &mut [])?;
Ok(())
}
#[test]
#[cfg(not(feature = "old-x86-backend"))]
fn typed_multiple_results() -> anyhow::Result<()> {
let mut store = Store::<()>::default();
let module = Module::new(
store.engine(),
r#"
(module
(func (export "f0") (result i32 i64)
i32.const 0
i64.const 1)
(func (export "f1") (param i32 i32 i32) (result f32 f64)
f32.const 2
f64.const 3)
)
"#,
)?;
let instance = Instance::new(&mut store, &module, &[])?;
let f0 = instance.get_func(&mut store, "f0").unwrap();
assert!(f0.typed::<(), (), _>(&store).is_err());
assert!(f0.typed::<(), (i32, f32), _>(&store).is_err());
assert!(f0.typed::<(), i32, _>(&store).is_err());
assert_eq!(
f0.typed::<(), (i32, i64), _>(&store)?
.call(&mut store, ())?,
(0, 1)
);
let f1 = instance.get_func(&mut store, "f1").unwrap();
assert_eq!(
f1.typed::<(i32, i32, i32), (f32, f64), _>(&store)?
.call(&mut store, (1, 2, 3))?,
(2., 3.)
);
Ok(())
}
#[test]
fn trap_doesnt_leak() -> anyhow::Result<()> {
#[derive(Default)]
struct Canary(Arc<AtomicBool>);
impl Drop for Canary {
fn drop(&mut self) {
self.0.store(true, SeqCst);
}
}
let mut store = Store::<()>::default();
// test that `Func::wrap` is correct
let canary1 = Canary::default();
let dtor1_run = canary1.0.clone();
let f1 = Func::wrap(&mut store, move || -> Result<(), Trap> {
drop(&canary1);
Err(Trap::new(""))
});
assert!(f1.typed::<(), (), _>(&store)?.call(&mut store, ()).is_err());
assert!(f1.call(&mut store, &[], &mut []).is_err());
// test that `Func::new` is correct
let canary2 = Canary::default();
let dtor2_run = canary2.0.clone();
let f2 = Func::new(&mut store, FuncType::new(None, None), move |_, _, _| {
drop(&canary2);
Err(Trap::new(""))
});
assert!(f2.typed::<(), (), _>(&store)?.call(&mut store, ()).is_err());
assert!(f2.call(&mut store, &[], &mut []).is_err());
// drop everything and ensure dtors are run
drop(store);
assert!(dtor1_run.load(SeqCst));
assert!(dtor2_run.load(SeqCst));
Ok(())
}
#[test]
#[cfg(not(feature = "old-x86-backend"))]
fn wrap_multiple_results() -> anyhow::Result<()> {
fn test<T>(store: &mut Store<()>, t: T) -> anyhow::Result<()>
where
T: WasmRet
+ WasmResults
+ PartialEq
+ Copy
+ std::fmt::Debug
+ EqualToValues
+ 'static
+ Send
+ Sync,
{
let f = Func::wrap(&mut *store, move || t);
let mut results = vec![Val::I32(0); f.ty(&store).results().len()];
assert_eq!(f.typed::<(), T, _>(&store)?.call(&mut *store, ())?, t);
f.call(&mut *store, &[], &mut results)?;
assert!(t.eq_values(&results));
let module = Module::new(store.engine(), &T::gen_wasm())?;
let instance = Instance::new(&mut *store, &module, &[f.into()])?;
let f = instance.get_func(&mut *store, "foo").unwrap();
assert_eq!(f.typed::<(), T, _>(&store)?.call(&mut *store, ())?, t);
f.call(&mut *store, &[], &mut results)?;
assert!(t.eq_values(&results));
Ok(())
}
let mut store = Store::default();
// 0 element
test(&mut store, ())?;
// 1 element
test(&mut store, (1i32,))?;
test(&mut store, (2u32,))?;
test(&mut store, (3i64,))?;
test(&mut store, (4u64,))?;
test(&mut store, (5.0f32,))?;
test(&mut store, (6.0f64,))?;
// 2 element ...
test(&mut store, (7i32, 8i32))?;
test(&mut store, (7i32, 8i64))?;
test(&mut store, (7i32, 8f32))?;
test(&mut store, (7i32, 8f64))?;
test(&mut store, (7i64, 8i32))?;
test(&mut store, (7i64, 8i64))?;
test(&mut store, (7i64, 8f32))?;
test(&mut store, (7i64, 8f64))?;
test(&mut store, (7f32, 8i32))?;
test(&mut store, (7f32, 8i64))?;
test(&mut store, (7f32, 8f32))?;
test(&mut store, (7f32, 8f64))?;
test(&mut store, (7f64, 8i32))?;
test(&mut store, (7f64, 8i64))?;
test(&mut store, (7f64, 8f32))?;
test(&mut store, (7f64, 8f64))?;
// and beyond...
test(&mut store, (1i32, 2i32, 3i32))?;
test(&mut store, (1i32, 2f32, 3i32))?;
test(&mut store, (1f64, 2f32, 3i32))?;
test(&mut store, (1f64, 2i64, 3i32))?;
test(&mut store, (1f32, 2f32, 3i64, 4f64))?;
test(&mut store, (1f64, 2i64, 3i32, 4i64, 5f32))?;
test(&mut store, (1i32, 2f64, 3i64, 4f64, 5f64, 6f32))?;
test(&mut store, (1i64, 2i32, 3i64, 4f32, 5f32, 6i32, 7u64))?;
test(&mut store, (1u32, 2f32, 3u64, 4f64, 5i32, 6f32, 7u64, 8u32))?;
test(
&mut store,
(1f32, 2f64, 3f32, 4i32, 5u32, 6i64, 7f32, 8i32, 9u64),
)?;
return Ok(());
trait EqualToValues {
fn eq_values(&self, values: &[Val]) -> bool;
fn gen_wasm() -> String;
}
macro_rules! equal_tuples {
($($cnt:tt ($($a:ident),*))*) => ($(
#[allow(non_snake_case)]
impl<$($a: EqualToValue,)*> EqualToValues for ($($a,)*) {
fn eq_values(&self, values: &[Val]) -> bool {
let ($($a,)*) = self;
let mut _values = values.iter();
_values.len() == $cnt &&
$($a.eq_value(_values.next().unwrap()) &&)*
true
}
fn gen_wasm() -> String {
let mut wasm = String::new();
wasm.push_str("(module ");
wasm.push_str("(type $t (func (result ");
$(
wasm.push_str($a::wasm_ty());
wasm.push_str(" ");
)*
wasm.push_str(")))");
wasm.push_str("(import \"\" \"\" (func $host (type $t)))");
wasm.push_str("(func (export \"foo\") (type $t)");
wasm.push_str("call $host");
wasm.push_str(")");
wasm.push_str(")");
wasm
}
}
)*)
}
equal_tuples! {
0 ()
1 (A1)
2 (A1, A2)
3 (A1, A2, A3)
4 (A1, A2, A3, A4)
5 (A1, A2, A3, A4, A5)
6 (A1, A2, A3, A4, A5, A6)
7 (A1, A2, A3, A4, A5, A6, A7)
8 (A1, A2, A3, A4, A5, A6, A7, A8)
9 (A1, A2, A3, A4, A5, A6, A7, A8, A9)
}
trait EqualToValue {
fn eq_value(&self, value: &Val) -> bool;
fn wasm_ty() -> &'static str;
}
macro_rules! equal_values {
($a:ident $($ty:ident $wasm:tt $variant:ident $e:expr,)*) => ($(
impl EqualToValue for $ty {
fn eq_value(&self, val: &Val) -> bool {
if let Val::$variant($a) = *val {
return *self == $e;
}
false
}
fn wasm_ty() -> &'static str {
$wasm
}
}
)*)
}
equal_values! {
a
i32 "i32" I32 a,
u32 "i32" I32 a as u32,
i64 "i64" I64 a,
u64 "i64" I64 a as u64,
f32 "f32" F32 f32::from_bits(a),
f64 "f64" F64 f64::from_bits(a),
}
}
#[test]
fn trampoline_for_declared_elem() -> anyhow::Result<()> {
let engine = Engine::default();
let module = Module::new(
&engine,
r#"
(module
(elem declare func $f)
(func $f)
(func (export "g") (result funcref)
(ref.func $f)
)
)
"#,
)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &module, &[])?;
let g = instance.get_typed_func::<(), Option<Func>, _>(&mut store, "g")?;
let func = g.call(&mut store, ())?;
func.unwrap().call(&mut store, &[], &mut [])?;
Ok(())
}
#[test]
fn wasm_ty_roundtrip() -> Result<(), anyhow::Error> {
let mut store = Store::<()>::default();
let debug = Func::wrap(
&mut store,
|a: i32, b: u32, c: f32, d: i64, e: u64, f: f64| {
assert_eq!(a, -1);
assert_eq!(b, 1);
assert_eq!(c, 2.0);
assert_eq!(d, -3);
assert_eq!(e, 3);
assert_eq!(f, 4.0);
},
);
let module = Module::new(
store.engine(),
r#"
(module
(import "" "" (func $debug (param i32 i32 f32 i64 i64 f64)))
(func (export "foo") (param i32 i32 f32 i64 i64 f64)
(if (i32.ne (local.get 0) (i32.const -1))
(then unreachable)
)
(if (i32.ne (local.get 1) (i32.const 1))
(then unreachable)
)
(if (f32.ne (local.get 2) (f32.const 2))
(then unreachable)
)
(if (i64.ne (local.get 3) (i64.const -3))
(then unreachable)
)
(if (i64.ne (local.get 4) (i64.const 3))
(then unreachable)
)
(if (f64.ne (local.get 5) (f64.const 4))
(then unreachable)
)
local.get 0
local.get 1
local.get 2
local.get 3
local.get 4
local.get 5
call $debug
)
)
"#,
)?;
let instance = Instance::new(&mut store, &module, &[debug.into()])?;
let foo =
instance.get_typed_func::<(i32, u32, f32, i64, u64, f64), (), _>(&mut store, "foo")?;
foo.call(&mut store, (-1, 1, 2.0, -3, 3, 4.0))?;
Ok(())
}
#[test]
fn typed_funcs_count_params_correctly_in_error_messages() -> anyhow::Result<()> {
let mut store = Store::<()>::default();
let module = Module::new(
store.engine(),
r#"
(module
(func (export "f") (param i32 i32))
)
"#,
)?;
let instance = Instance::new(&mut store, &module, &[])?;
// Too few parameters.
match instance.get_typed_func::<(), (), _>(&mut store, "f") {
Ok(_) => panic!("should be wrong signature"),
Err(e) => {
let msg = format!("{:?}", e);
assert!(dbg!(msg).contains("expected 0 types, found 2"))
}
}
match instance.get_typed_func::<(i32,), (), _>(&mut store, "f") {
Ok(_) => panic!("should be wrong signature"),
Err(e) => {
let msg = format!("{:?}", e);
assert!(dbg!(msg).contains("expected 1 types, found 2"))
}
}
// Too many parameters.
match instance.get_typed_func::<(i32, i32, i32), (), _>(&mut store, "f") {
Ok(_) => panic!("should be wrong signature"),
Err(e) => {
let msg = format!("{:?}", e);
assert!(dbg!(msg).contains("expected 3 types, found 2"))
}
}
Ok(())
}
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