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d5ce51e8d1a26601ba9a04ead9287ca3ca999f21
wasmtime/tests/all/component_model/func.rs
Alex Crichton d5ce51e8d1 Redesign interface type value representation (#4198) 
Prior to this PR a major feature of calling component exports (#4039)
was the usage of the `Value<T>` type. This type represents a value
stored in wasm linear memory (the type `T` stored there). This
implementation had a number of drawbacks though:

* When returning a value it's ABI-specific whether you use `T` or
  `Value<T>` as a return value. If `T` is represented with one wasm
  primitive then you have to return `T`, otherwise the return value must
  be `Value<T>`. This is somewhat non-obvious and leaks ABI-details into
  the API which is unfortunate.

* The `T` in `Value<T>` was somewhat non-obvious. For example a
  wasm-owned string was `Value<String>`. Using `Value<&str>` didn't
  work.

* Working with `Value<T>` was unergonomic in the sense that you had to
  first "pair" it with a `&Store<U>` to get a `Cursor<T>` and then you
  could start reading the value.

* Custom structs and enums, while not implemented yet, were planned to
  be quite wonky where when you had `Cursor<MyStruct>` then you would
  have to import a `CursorMyStructExt` trait generated by a proc-macro
  (think a `#[derive]` on the definition of `MyStruct`) which would
  enable field accessors, returning cursors of all the fields.

* In general there was no "generic way" to load a `T` from memory. Other
  operations like lift/lower/store all had methods in the
  `ComponentValue` trait but load had no equivalent.

None of these drawbacks were deal-breakers per-se. When I started
to implement imported functions, though, the `Value<T>` type no longer
worked. The major difference between imports and exports is that when
receiving values from wasm an export returns at most one wasm primitive
where an import can yield (through arguments) up to 16 wasm primitives.
This means that if an export returned a string it would always be
`Value<String>` but if an import took a string as an argument there was
actually no way to represent this with `Value<String>` since the value
wasn't actually stored in memory but rather the pointer/length pair is
received as arguments. Overall this meant that `Value<T>` couldn't be
used for arguments-to-imports, which means that altogether something new
would be required.

This PR completely removes the `Value<T>` and `Cursor<T>` type in favor
of a different implementation. The inspiration from this comes from the
fact that all primitives can be both lifted and lowered into wasm while
it's just some times which can only go one direction. For example
`String` can be lowered into wasm but can't be lifted from wasm. Instead
some sort of "view" into wasm needs to be created during lifting.

One of the realizations from #4039 was that we could leverage
run-time-type-checking to reject static constructions that don't make
sense. For example if an embedder asserts that a wasm function returns a
Rust `String` we can reject that at typechecking time because it's
impossible for a wasm module to ever do that.

The new system of imports/exports in this PR now looks like:

* Type-checking takes into accont an `Op` operation which indicates
  whether we'll be lifting or lowering the type. This means that we can
  allow the lowering operation for `String` but disallow the lifting
  operation. While we can't statically rule out an embedder saying that
  a component returns a `String` we can now reject it at runtime and
  disallow it from being called.

* The `ComponentValue` trait now sports a new `load` function. This
  function will load and instance of `Self` from the byte-array
  provided. This is implemented for all types but only ever actually
  executed when the `lift` operation is allowed during type-checking.

* The `Lift` associated type is removed since it's now expected that the
  lift operation returns `Self`.

* The `ComponentReturn` trait is now no longer necessary and is removed.
  Instead returns are bounded by `ComponentValue`. During type-checking
  it's required that the return value can be lifted, disallowing, for
  example, returning a `String` or `&str`.

* With `Value` gone there's no need to specify the ABI details of the
  return value, or whether it's communicated through memory or not. This
  means that handling return values through memory is transparently
  handled by Wasmtime.

* Validation is in a sense more eagerly performed now. Whenever a value
  `T` is loaded the entire immediate structure of `T` is loaded and
  validated. Note that recursive through memory validation still does
  not happen, so the contents of lists or strings aren't validated, it's
  just validated that the pointers are in-bounds.

Overall this felt like a much clearer system to work with and should be
much easier to integrate with imported functions as well. The new
`WasmStr` and `WasmList<T>` types can be used in import arguments and
lifted from the immediate arguments provided rather than forcing them to
always be stored in memory.
2022-06-01 15:38:36 -05:00

1885 lines
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use anyhow::Result;
use std::rc::Rc;
use std::sync::Arc;
use wasmtime::component::*;
use wasmtime::{Store, Trap, TrapCode};
const CANON_32BIT_NAN: u32 = 0b01111111110000000000000000000000;
const CANON_64BIT_NAN: u64 = 0b0111111111111000000000000000000000000000000000000000000000000000;
// A simple bump allocator which can be used with modules below
const REALLOC_AND_FREE: &str = r#"
(global $last (mut i32) (i32.const 8))
(func $realloc (export "canonical_abi_realloc")
(param $old_ptr i32)
(param $old_size i32)
(param $align i32)
(param $new_size i32)
(result i32)
;; Test if the old pointer is non-null
local.get $old_ptr
if
;; If the old size is bigger than the new size then
;; this is a shrink and transparently allow it
local.get $old_size
local.get $new_size
i32.gt_u
if
local.get $old_ptr
return
end
;; ... otherwise this is unimplemented
unreachable
end
;; align up `$last`
(global.set $last
(i32.and
(i32.add
(global.get $last)
(i32.add
(local.get $align)
(i32.const -1)))
(i32.xor
(i32.add
(local.get $align)
(i32.const -1))
(i32.const -1))))
;; save the current value of `$last` as the return value
global.get $last
;; ensure anything necessary is set to valid data by spraying a bit
;; pattern that is invalid
global.get $last
i32.const 0xde
local.get $new_size
memory.fill
;; bump our pointer
(global.set $last
(i32.add
(global.get $last)
(local.get $new_size)))
)
(func (export "canonical_abi_free") (param i32 i32 i32))
"#;
#[test]
fn thunks() -> Result<()> {
let component = r#"
(component
(module $m
(func (export "thunk"))
(func (export "thunk-trap") unreachable)
)
(instance $i (instantiate (module $m)))
(func (export "thunk")
(canon.lift (func) (func $i "thunk"))
)
(func (export "thunk-trap")
(canon.lift (func) (func $i "thunk-trap"))
)
)
"#;
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
instance
.get_typed_func::<(), (), _>(&mut store, "thunk")?
.call(&mut store, ())?;
let err = instance
.get_typed_func::<(), (), _>(&mut store, "thunk-trap")?
.call(&mut store, ())
.unwrap_err();
assert!(err.downcast::<Trap>()?.trap_code() == Some(TrapCode::UnreachableCodeReached));
Ok(())
}
#[test]
fn typecheck() -> Result<()> {
let component = r#"
(component
(module $m
(func (export "thunk"))
(func (export "take-string") (param i32 i32))
(func (export "two-args") (param i32 i32 i32))
(func (export "ret-one") (result i32) unreachable)
(memory (export "memory") 1)
(func (export "canonical_abi_realloc") (param i32 i32 i32 i32) (result i32)
unreachable)
(func (export "canonical_abi_free") (param i32 i32 i32)
unreachable)
)
(instance $i (instantiate (module $m)))
(func (export "thunk")
(canon.lift (func) (func $i "thunk"))
)
(func (export "take-string")
(canon.lift (func (param string)) (into $i) (func $i "take-string"))
)
(func (export "take-two-args")
(canon.lift (func (param s32) (param (list u8))) (into $i) (func $i "two-args"))
)
(func (export "ret-tuple")
(canon.lift (func (result (tuple u8 s8))) (into $i) (func $i "ret-one"))
)
(func (export "ret-tuple1")
(canon.lift (func (result (tuple u32))) (into $i) (func $i "ret-one"))
)
(func (export "ret-string")
(canon.lift (func (result string)) (into $i) (func $i "ret-one"))
)
(func (export "ret-list-u8")
(canon.lift (func (result (list u8))) (into $i) (func $i "ret-one"))
)
)
"#;
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
let thunk = instance.get_func(&mut store, "thunk").unwrap();
let take_string = instance.get_func(&mut store, "take-string").unwrap();
let take_two_args = instance.get_func(&mut store, "take-two-args").unwrap();
let ret_tuple = instance.get_func(&mut store, "ret-tuple").unwrap();
let ret_tuple1 = instance.get_func(&mut store, "ret-tuple1").unwrap();
let ret_string = instance.get_func(&mut store, "ret-string").unwrap();
let ret_list_u8 = instance.get_func(&mut store, "ret-list-u8").unwrap();
assert!(thunk.typed::<(), u32, _>(&store).is_err());
assert!(thunk.typed::<(u32,), (), _>(&store).is_err());
assert!(thunk.typed::<(), (), _>(&store).is_ok());
assert!(take_string.typed::<(), (), _>(&store).is_err());
assert!(take_string.typed::<(), String, _>(&store).is_err());
assert!(take_string
.typed::<(String, String), String, _>(&store)
.is_err());
assert!(take_string.typed::<(String,), (), _>(&store).is_ok());
assert!(take_string.typed::<(&str,), (), _>(&store).is_ok());
assert!(take_string.typed::<(&[u8],), (), _>(&store).is_err());
assert!(take_two_args.typed::<(), (), _>(&store).is_err());
assert!(take_two_args.typed::<(i32, &[u8]), u32, _>(&store).is_err());
assert!(take_two_args.typed::<(u32, &[u8]), (), _>(&store).is_err());
assert!(take_two_args.typed::<(i32, &[u8]), (), _>(&store).is_ok());
assert!(ret_tuple.typed::<(), (), _>(&store).is_err());
assert!(ret_tuple.typed::<(), (u8,), _>(&store).is_err());
assert!(ret_tuple.typed::<(), (u8, i8), _>(&store).is_ok());
assert!(ret_tuple1.typed::<(), (u32,), _>(&store).is_ok());
assert!(ret_tuple1.typed::<(), u32, _>(&store).is_err());
assert!(ret_string.typed::<(), (), _>(&store).is_err());
assert!(ret_string.typed::<(), String, _>(&store).is_err());
assert!(ret_string.typed::<(), &str, _>(&store).is_err());
assert!(ret_string.typed::<(), WasmStr, _>(&store).is_ok());
assert!(ret_list_u8.typed::<(), &[u8], _>(&store).is_err());
assert!(ret_list_u8.typed::<(), Vec<u8>, _>(&store).is_err());
assert!(ret_list_u8.typed::<(), WasmList<u16>, _>(&store).is_err());
assert!(ret_list_u8.typed::<(), WasmList<i8>, _>(&store).is_err());
assert!(ret_list_u8.typed::<(), WasmList<u8>, _>(&store).is_ok());
Ok(())
}
#[test]
fn integers() -> Result<()> {
let component = r#"
(component
(module $m
(func (export "take-i32-100") (param i32)
local.get 0
i32.const 100
i32.eq
br_if 0
unreachable
)
(func (export "take-i64-100") (param i64)
local.get 0
i64.const 100
i64.eq
br_if 0
unreachable
)
(func (export "ret-i32-0") (result i32) i32.const 0)
(func (export "ret-i64-0") (result i64) i64.const 0)
(func (export "ret-i32-minus-1") (result i32) i32.const -1)
(func (export "ret-i64-minus-1") (result i64) i64.const -1)
(func (export "ret-i32-100000") (result i32) i32.const 100000)
)
(instance $i (instantiate (module $m)))
(func (export "take-u8") (canon.lift (func (param u8)) (func $i "take-i32-100")))
(func (export "take-s8") (canon.lift (func (param s8)) (func $i "take-i32-100")))
(func (export "take-u16") (canon.lift (func (param u16)) (func $i "take-i32-100")))
(func (export "take-s16") (canon.lift (func (param s16)) (func $i "take-i32-100")))
(func (export "take-u32") (canon.lift (func (param u32)) (func $i "take-i32-100")))
(func (export "take-s32") (canon.lift (func (param s32)) (func $i "take-i32-100")))
(func (export "take-u64") (canon.lift (func (param u64)) (func $i "take-i64-100")))
(func (export "take-s64") (canon.lift (func (param s64)) (func $i "take-i64-100")))
(func (export "ret-u8") (canon.lift (func (result u8)) (func $i "ret-i32-0")))
(func (export "ret-s8") (canon.lift (func (result s8)) (func $i "ret-i32-0")))
(func (export "ret-u16") (canon.lift (func (result u16)) (func $i "ret-i32-0")))
(func (export "ret-s16") (canon.lift (func (result s16)) (func $i "ret-i32-0")))
(func (export "ret-u32") (canon.lift (func (result u32)) (func $i "ret-i32-0")))
(func (export "ret-s32") (canon.lift (func (result s32)) (func $i "ret-i32-0")))
(func (export "ret-u64") (canon.lift (func (result u64)) (func $i "ret-i64-0")))
(func (export "ret-s64") (canon.lift (func (result s64)) (func $i "ret-i64-0")))
(func (export "retm1-u8") (canon.lift (func (result u8)) (func $i "ret-i32-minus-1")))
(func (export "retm1-s8") (canon.lift (func (result s8)) (func $i "ret-i32-minus-1")))
(func (export "retm1-u16") (canon.lift (func (result u16)) (func $i "ret-i32-minus-1")))
(func (export "retm1-s16") (canon.lift (func (result s16)) (func $i "ret-i32-minus-1")))
(func (export "retm1-u32") (canon.lift (func (result u32)) (func $i "ret-i32-minus-1")))
(func (export "retm1-s32") (canon.lift (func (result s32)) (func $i "ret-i32-minus-1")))
(func (export "retm1-u64") (canon.lift (func (result u64)) (func $i "ret-i64-minus-1")))
(func (export "retm1-s64") (canon.lift (func (result s64)) (func $i "ret-i64-minus-1")))
(func (export "retbig-u8") (canon.lift (func (result u8)) (func $i "ret-i32-100000")))
(func (export "retbig-s8") (canon.lift (func (result s8)) (func $i "ret-i32-100000")))
(func (export "retbig-u16") (canon.lift (func (result u16)) (func $i "ret-i32-100000")))
(func (export "retbig-s16") (canon.lift (func (result s16)) (func $i "ret-i32-100000")))
(func (export "retbig-u32") (canon.lift (func (result u32)) (func $i "ret-i32-100000")))
(func (export "retbig-s32") (canon.lift (func (result s32)) (func $i "ret-i32-100000")))
)
"#;
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
// Passing in 100 is valid for all primitives
instance
.get_typed_func::<(u8,), (), _>(&mut store, "take-u8")?
.call(&mut store, (100,))?;
instance
.get_typed_func::<(i8,), (), _>(&mut store, "take-s8")?
.call(&mut store, (100,))?;
instance
.get_typed_func::<(u16,), (), _>(&mut store, "take-u16")?
.call(&mut store, (100,))?;
instance
.get_typed_func::<(i16,), (), _>(&mut store, "take-s16")?
.call(&mut store, (100,))?;
instance
.get_typed_func::<(u32,), (), _>(&mut store, "take-u32")?
.call(&mut store, (100,))?;
instance
.get_typed_func::<(i32,), (), _>(&mut store, "take-s32")?
.call(&mut store, (100,))?;
instance
.get_typed_func::<(u64,), (), _>(&mut store, "take-u64")?
.call(&mut store, (100,))?;
instance
.get_typed_func::<(i64,), (), _>(&mut store, "take-s64")?
.call(&mut store, (100,))?;
// This specific wasm instance traps if any value other than 100 is passed
instance
.get_typed_func::<(u8,), (), _>(&mut store, "take-u8")?
.call(&mut store, (101,))
.unwrap_err()
.downcast::<Trap>()?;
instance
.get_typed_func::<(i8,), (), _>(&mut store, "take-s8")?
.call(&mut store, (101,))
.unwrap_err()
.downcast::<Trap>()?;
instance
.get_typed_func::<(u16,), (), _>(&mut store, "take-u16")?
.call(&mut store, (101,))
.unwrap_err()
.downcast::<Trap>()?;
instance
.get_typed_func::<(i16,), (), _>(&mut store, "take-s16")?
.call(&mut store, (101,))
.unwrap_err()
.downcast::<Trap>()?;
instance
.get_typed_func::<(u32,), (), _>(&mut store, "take-u32")?
.call(&mut store, (101,))
.unwrap_err()
.downcast::<Trap>()?;
instance
.get_typed_func::<(i32,), (), _>(&mut store, "take-s32")?
.call(&mut store, (101,))
.unwrap_err()
.downcast::<Trap>()?;
instance
.get_typed_func::<(u64,), (), _>(&mut store, "take-u64")?
.call(&mut store, (101,))
.unwrap_err()
.downcast::<Trap>()?;
instance
.get_typed_func::<(i64,), (), _>(&mut store, "take-s64")?
.call(&mut store, (101,))
.unwrap_err()
.downcast::<Trap>()?;
// Zero can be returned as any integer
assert_eq!(
instance
.get_typed_func::<(), u8, _>(&mut store, "ret-u8")?
.call(&mut store, ())?,
0
);
assert_eq!(
instance
.get_typed_func::<(), i8, _>(&mut store, "ret-s8")?
.call(&mut store, ())?,
0
);
assert_eq!(
instance
.get_typed_func::<(), u16, _>(&mut store, "ret-u16")?
.call(&mut store, ())?,
0
);
assert_eq!(
instance
.get_typed_func::<(), i16, _>(&mut store, "ret-s16")?
.call(&mut store, ())?,
0
);
assert_eq!(
instance
.get_typed_func::<(), u32, _>(&mut store, "ret-u32")?
.call(&mut store, ())?,
0
);
assert_eq!(
instance
.get_typed_func::<(), i32, _>(&mut store, "ret-s32")?
.call(&mut store, ())?,
0
);
assert_eq!(
instance
.get_typed_func::<(), u64, _>(&mut store, "ret-u64")?
.call(&mut store, ())?,
0
);
assert_eq!(
instance
.get_typed_func::<(), i64, _>(&mut store, "ret-s64")?
.call(&mut store, ())?,
0
);
// Returning -1 should fail for u8 and u16, but succeed for all other types.
let err = instance
.get_typed_func::<(), u8, _>(&mut store, "retm1-u8")?
.call(&mut store, ())
.unwrap_err();
assert!(
err.to_string().contains("out of range integral type"),
"{}",
err
);
assert_eq!(
instance
.get_typed_func::<(), i8, _>(&mut store, "retm1-s8")?
.call(&mut store, ())?,
-1
);
let err = instance
.get_typed_func::<(), u16, _>(&mut store, "retm1-u16")?
.call(&mut store, ())
.unwrap_err();
assert!(
err.to_string().contains("out of range integral type"),
"{}",
err
);
assert_eq!(
instance
.get_typed_func::<(), i16, _>(&mut store, "retm1-s16")?
.call(&mut store, ())?,
-1
);
assert_eq!(
instance
.get_typed_func::<(), u32, _>(&mut store, "retm1-u32")?
.call(&mut store, ())?,
0xffffffff
);
assert_eq!(
instance
.get_typed_func::<(), i32, _>(&mut store, "retm1-s32")?
.call(&mut store, ())?,
-1
);
assert_eq!(
instance
.get_typed_func::<(), u64, _>(&mut store, "retm1-u64")?
.call(&mut store, ())?,
0xffffffff_ffffffff
);
assert_eq!(
instance
.get_typed_func::<(), i64, _>(&mut store, "retm1-s64")?
.call(&mut store, ())?,
-1
);
// Returning 100000 should fail for small primitives but succeed for 32-bit.
let err = instance
.get_typed_func::<(), u8, _>(&mut store, "retbig-u8")?
.call(&mut store, ())
.unwrap_err();
assert!(
err.to_string().contains("out of range integral type"),
"{}",
err
);
let err = instance
.get_typed_func::<(), i8, _>(&mut store, "retbig-s8")?
.call(&mut store, ())
.unwrap_err();
assert!(
err.to_string().contains("out of range integral type"),
"{}",
err
);
let err = instance
.get_typed_func::<(), u16, _>(&mut store, "retbig-u16")?
.call(&mut store, ())
.unwrap_err();
assert!(
err.to_string().contains("out of range integral type"),
"{}",
err
);
let err = instance
.get_typed_func::<(), i16, _>(&mut store, "retbig-s16")?
.call(&mut store, ())
.unwrap_err();
assert!(
err.to_string().contains("out of range integral type"),
"{}",
err
);
assert_eq!(
instance
.get_typed_func::<(), u32, _>(&mut store, "retbig-u32")?
.call(&mut store, ())?,
100000
);
assert_eq!(
instance
.get_typed_func::<(), i32, _>(&mut store, "retbig-s32")?
.call(&mut store, ())?,
100000
);
Ok(())
}
#[test]
fn type_layers() -> Result<()> {
let component = r#"
(component
(module $m
(func (export "take-i32-100") (param i32)
local.get 0
i32.const 2
i32.eq
br_if 0
unreachable
)
)
(instance $i (instantiate (module $m)))
(func (export "take-u32") (canon.lift (func (param u32)) (func $i "take-i32-100")))
)
"#;
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
instance
.get_typed_func::<(Box<u32>,), (), _>(&mut store, "take-u32")?
.call(&mut store, (Box::new(2),))?;
instance
.get_typed_func::<(&u32,), (), _>(&mut store, "take-u32")?
.call(&mut store, (&2,))?;
instance
.get_typed_func::<(Rc<u32>,), (), _>(&mut store, "take-u32")?
.call(&mut store, (Rc::new(2),))?;
instance
.get_typed_func::<(Arc<u32>,), (), _>(&mut store, "take-u32")?
.call(&mut store, (Arc::new(2),))?;
instance
.get_typed_func::<(&Box<Arc<Rc<u32>>>,), (), _>(&mut store, "take-u32")?
.call(&mut store, (&Box::new(Arc::new(Rc::new(2))),))?;
Ok(())
}
#[test]
fn floats() -> Result<()> {
let component = r#"
(component
(module $m
(func (export "i32.reinterpret_f32") (param f32) (result i32)
local.get 0
i32.reinterpret_f32
)
(func (export "i64.reinterpret_f64") (param f64) (result i64)
local.get 0
i64.reinterpret_f64
)
(func (export "f32.reinterpret_i32") (param i32) (result f32)
local.get 0
f32.reinterpret_i32
)
(func (export "f64.reinterpret_i64") (param i64) (result f64)
local.get 0
f64.reinterpret_i64
)
)
(instance $i (instantiate (module $m)))
(func (export "f32-to-u32")
(canon.lift (func (param float32) (result u32)) (func $i "i32.reinterpret_f32"))
)
(func (export "f64-to-u64")
(canon.lift (func (param float64) (result u64)) (func $i "i64.reinterpret_f64"))
)
(func (export "u32-to-f32")
(canon.lift (func (param u32) (result float32)) (func $i "f32.reinterpret_i32"))
)
(func (export "u64-to-f64")
(canon.lift (func (param u64) (result float64)) (func $i "f64.reinterpret_i64"))
)
)
"#;
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
let f32_to_u32 = instance.get_typed_func::<(f32,), u32, _>(&mut store, "f32-to-u32")?;
let f64_to_u64 = instance.get_typed_func::<(f64,), u64, _>(&mut store, "f64-to-u64")?;
let u32_to_f32 = instance.get_typed_func::<(u32,), f32, _>(&mut store, "u32-to-f32")?;
let u64_to_f64 = instance.get_typed_func::<(u64,), f64, _>(&mut store, "u64-to-f64")?;
assert_eq!(f32_to_u32.call(&mut store, (1.0,))?, 1.0f32.to_bits());
assert_eq!(f64_to_u64.call(&mut store, (2.0,))?, 2.0f64.to_bits());
assert_eq!(u32_to_f32.call(&mut store, (3.0f32.to_bits(),))?, 3.0);
assert_eq!(u64_to_f64.call(&mut store, (4.0f64.to_bits(),))?, 4.0);
assert_eq!(
u32_to_f32
.call(&mut store, (CANON_32BIT_NAN | 1,))?
.to_bits(),
CANON_32BIT_NAN
);
assert_eq!(
u64_to_f64
.call(&mut store, (CANON_64BIT_NAN | 1,))?
.to_bits(),
CANON_64BIT_NAN
);
assert_eq!(
f32_to_u32.call(&mut store, (f32::from_bits(CANON_32BIT_NAN | 1),))?,
CANON_32BIT_NAN
);
assert_eq!(
f64_to_u64.call(&mut store, (f64::from_bits(CANON_64BIT_NAN | 1),))?,
CANON_64BIT_NAN
);
Ok(())
}
#[test]
fn bools() -> Result<()> {
let component = r#"
(component
(module $m
(func (export "pass") (param i32) (result i32) local.get 0)
)
(instance $i (instantiate (module $m)))
(func (export "u32-to-bool")
(canon.lift (func (param u32) (result bool)) (func $i "pass"))
)
(func (export "bool-to-u32")
(canon.lift (func (param bool) (result u32)) (func $i "pass"))
)
)
"#;
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
let u32_to_bool = instance.get_typed_func::<(u32,), bool, _>(&mut store, "u32-to-bool")?;
let bool_to_u32 = instance.get_typed_func::<(bool,), u32, _>(&mut store, "bool-to-u32")?;
assert_eq!(bool_to_u32.call(&mut store, (false,))?, 0);
assert_eq!(bool_to_u32.call(&mut store, (true,))?, 1);
assert_eq!(u32_to_bool.call(&mut store, (0,))?, false);
assert_eq!(u32_to_bool.call(&mut store, (1,))?, true);
let err = u32_to_bool.call(&mut store, (2,)).unwrap_err();
assert!(err.to_string().contains("invalid boolean"), "{}", err);
Ok(())
}
#[test]
fn chars() -> Result<()> {
let component = r#"
(component
(module $m
(func (export "pass") (param i32) (result i32) local.get 0)
)
(instance $i (instantiate (module $m)))
(func (export "u32-to-char")
(canon.lift (func (param u32) (result char)) (func $i "pass"))
)
(func (export "char-to-u32")
(canon.lift (func (param char) (result u32)) (func $i "pass"))
)
)
"#;
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
let u32_to_char = instance.get_typed_func::<(u32,), char, _>(&mut store, "u32-to-char")?;
let char_to_u32 = instance.get_typed_func::<(char,), u32, _>(&mut store, "char-to-u32")?;
let mut roundtrip = |x: char| -> Result<()> {
assert_eq!(char_to_u32.call(&mut store, (x,))?, x as u32);
assert_eq!(u32_to_char.call(&mut store, (x as u32,))?, x);
Ok(())
};
roundtrip('x')?;
roundtrip('a')?;
roundtrip('\0')?;
roundtrip('\n')?;
roundtrip('💝')?;
let err = u32_to_char.call(&mut store, (0xd800,)).unwrap_err();
assert!(err.to_string().contains("integer out of range"), "{}", err);
let err = u32_to_char.call(&mut store, (0xdfff,)).unwrap_err();
assert!(err.to_string().contains("integer out of range"), "{}", err);
let err = u32_to_char.call(&mut store, (0x110000,)).unwrap_err();
assert!(err.to_string().contains("integer out of range"), "{}", err);
let err = u32_to_char.call(&mut store, (u32::MAX,)).unwrap_err();
assert!(err.to_string().contains("integer out of range"), "{}", err);
Ok(())
}
#[test]
fn tuple_result() -> Result<()> {
let component = r#"
(component
(module $m
(memory (export "memory") 1)
(func (export "foo") (param i32 i32 f32 f64) (result i32)
(local $base i32)
(local.set $base (i32.const 8))
(i32.store8 offset=0 (local.get $base) (local.get 0))
(i32.store16 offset=2 (local.get $base) (local.get 1))
(f32.store offset=4 (local.get $base) (local.get 2))
(f64.store offset=8 (local.get $base) (local.get 3))
local.get $base
)
(func (export "invalid") (result i32)
i32.const -1
)
(func (export "canonical_abi_realloc") (param i32 i32 i32 i32) (result i32)
unreachable)
(func (export "canonical_abi_free") (param i32 i32 i32)
unreachable)
)
(instance $i (instantiate (module $m)))
(type $result (tuple s8 u16 float32 float64))
(func (export "tuple")
(canon.lift
(func (param s8) (param u16) (param float32) (param float64) (result $result))
(into $i)
(func $i "foo")
)
)
(func (export "invalid")
(canon.lift (func (result $result)) (into $i) (func $i "invalid"))
)
)
"#;
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
let input = (-1, 100, 3.0, 100.0);
let output = instance
.get_typed_func::<(i8, u16, f32, f64), (i8, u16, f32, f64), _>(&mut store, "tuple")?
.call(&mut store, input)?;
assert_eq!(input, output);
let invalid_func =
instance.get_typed_func::<(), (i8, u16, f32, f64), _>(&mut store, "invalid")?;
let err = invalid_func.call(&mut store, ()).err().unwrap();
assert!(
err.to_string().contains("pointer out of bounds of memory"),
"{}",
err
);
Ok(())
}
#[test]
fn strings() -> Result<()> {
let component = format!(
r#"(component
(module $m
(memory (export "memory") 1)
(func (export "roundtrip") (param i32 i32) (result i32)
(local $base i32)
(local.set $base
(call $realloc
(i32.const 0)
(i32.const 0)
(i32.const 4)
(i32.const 8)))
(i32.store offset=0
(local.get $base)
(local.get 0))
(i32.store offset=4
(local.get $base)
(local.get 1))
(local.get $base)
)
{REALLOC_AND_FREE}
)
(instance $i (instantiate (module $m)))
(func (export "list8-to-str")
(canon.lift
(func (param (list u8)) (result string))
(into $i)
(func $i "roundtrip")
)
)
(func (export "str-to-list8")
(canon.lift
(func (param string) (result (list u8)))
(into $i)
(func $i "roundtrip")
)
)
(func (export "list16-to-str")
(canon.lift
(func (param (list u16)) (result string))
string=utf16
(into $i)
(func $i "roundtrip")
)
)
(func (export "str-to-list16")
(canon.lift
(func (param string) (result (list u16)))
string=utf16
(into $i)
(func $i "roundtrip")
)
)
)"#
);
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
let list8_to_str =
instance.get_typed_func::<(&[u8],), WasmStr, _>(&mut store, "list8-to-str")?;
let str_to_list8 =
instance.get_typed_func::<(&str,), WasmList<u8>, _>(&mut store, "str-to-list8")?;
let list16_to_str =
instance.get_typed_func::<(&[u16],), WasmStr, _>(&mut store, "list16-to-str")?;
let str_to_list16 =
instance.get_typed_func::<(&str,), WasmList<u16>, _>(&mut store, "str-to-list16")?;
let mut roundtrip = |x: &str| -> Result<()> {
let ret = list8_to_str.call(&mut store, (x.as_bytes(),))?;
assert_eq!(ret.to_str(&store)?, x);
let utf16 = x.encode_utf16().collect::<Vec<_>>();
let ret = list16_to_str.call(&mut store, (&utf16[..],))?;
assert_eq!(ret.to_str(&store)?, x);
let ret = str_to_list8.call(&mut store, (x,))?;
assert_eq!(ret.iter(&store).collect::<Result<Vec<_>>>()?, x.as_bytes());
let ret = str_to_list16.call(&mut store, (x,))?;
assert_eq!(ret.iter(&store).collect::<Result<Vec<_>>>()?, utf16,);
Ok(())
};
roundtrip("")?;
roundtrip("foo")?;
roundtrip("hello there")?;
roundtrip("💝")?;
roundtrip("Löwe 老虎 Léopard")?;
let ret = list8_to_str.call(&mut store, (b"\xff",))?;
let err = ret.to_str(&store).unwrap_err();
assert!(err.to_string().contains("invalid utf-8"), "{}", err);
let ret = list8_to_str.call(&mut store, (b"hello there \xff invalid",))?;
let err = ret.to_str(&store).unwrap_err();
assert!(err.to_string().contains("invalid utf-8"), "{}", err);
let ret = list16_to_str.call(&mut store, (&[0xd800],))?;
let err = ret.to_str(&store).unwrap_err();
assert!(err.to_string().contains("unpaired surrogate"), "{}", err);
let ret = list16_to_str.call(&mut store, (&[0xdfff],))?;
let err = ret.to_str(&store).unwrap_err();
assert!(err.to_string().contains("unpaired surrogate"), "{}", err);
let ret = list16_to_str.call(&mut store, (&[0xd800, 0xff00],))?;
let err = ret.to_str(&store).unwrap_err();
assert!(err.to_string().contains("unpaired surrogate"), "{}", err);
Ok(())
}
#[test]
fn many_parameters() -> Result<()> {
let component = format!(
r#"(component
(module $m
(memory (export "memory") 1)
(func (export "foo") (param i32) (result i32)
(local $base i32)
;; Allocate space for the return
(local.set $base
(call $realloc
(i32.const 0)
(i32.const 0)
(i32.const 4)
(i32.const 12)))
;; Store the pointer/length of the entire linear memory
;; so we have access to everything.
(i32.store offset=0
(local.get $base)
(i32.const 0))
(i32.store offset=4
(local.get $base)
(i32.mul
(memory.size)
(i32.const 65536)))
;; And also store our pointer parameter
(i32.store offset=8
(local.get $base)
(local.get 0))
(local.get $base)
)
{REALLOC_AND_FREE}
)
(instance $i (instantiate (module $m)))
(type $result (tuple (list u8) u32))
(type $t (func
(param s8) ;; offset 0, size 1
(param u64) ;; offset 8, size 8
(param float32) ;; offset 16, size 4
(param u8) ;; offset 20, size 1
(param unit) ;; offset 21, size 0
(param s16) ;; offset 22, size 2
(param string) ;; offset 24, size 8
(param (list u32)) ;; offset 32, size 8
(param bool) ;; offset 40, size 1
(param bool) ;; offset 41, size 1
(param char) ;; offset 44, size 4
(param (list bool)) ;; offset 48, size 8
(param (list char)) ;; offset 56, size 8
(param (list string)) ;; offset 64, size 8
(result $result)
))
(func (export "many-param")
(canon.lift (type $t) (into $i) (func $i "foo"))
)
)"#
);
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
let func = instance.get_typed_func::<(
i8,
u64,
f32,
u8,
(),
i16,
&str,
&[u32],
bool,
bool,
char,
&[bool],
&[char],
&[&str],
), (WasmList<u8>, u32), _>(&mut store, "many-param")?;
let input = (
-100,
u64::MAX / 2,
f32::from_bits(CANON_32BIT_NAN | 1),
38,
(),
18831,
"this is the first string",
[1, 2, 3, 4, 5, 6, 7, 8].as_slice(),
true,
false,
'🚩',
[false, true, false, true, true].as_slice(),
['🍌', '🥐', '🍗', '🍙', '🍡'].as_slice(),
[
"the quick",
"brown fox",
"was too lazy",
"to jump over the dog",
"what a demanding dog",
]
.as_slice(),
);
let (memory, pointer) = func.call(&mut store, input)?;
let memory = memory.as_slice(&store);
let mut actual = &memory[pointer as usize..][..72];
assert_eq!(i8::from_le_bytes(*actual.take_n::<1>()), input.0);
actual.skip::<7>();
assert_eq!(u64::from_le_bytes(*actual.take_n::<8>()), input.1);
assert_eq!(u32::from_le_bytes(*actual.take_n::<4>()), CANON_32BIT_NAN);
assert_eq!(u8::from_le_bytes(*actual.take_n::<1>()), input.3);
actual.skip::<1>();
assert_eq!(i16::from_le_bytes(*actual.take_n::<2>()), input.5);
assert_eq!(actual.ptr_len(memory, 1), input.6.as_bytes());
let mut mem = actual.ptr_len(memory, 4);
for expected in input.7.iter() {
assert_eq!(u32::from_le_bytes(*mem.take_n::<4>()), *expected);
}
assert!(mem.is_empty());
assert_eq!(actual.take_n::<1>(), &[input.8 as u8]);
assert_eq!(actual.take_n::<1>(), &[input.9 as u8]);
actual.skip::<2>();
assert_eq!(u32::from_le_bytes(*actual.take_n::<4>()), input.10 as u32);
// (list bool)
mem = actual.ptr_len(memory, 1);
for expected in input.11.iter() {
assert_eq!(mem.take_n::<1>(), &[*expected as u8]);
}
assert!(mem.is_empty());
// (list char)
mem = actual.ptr_len(memory, 4);
for expected in input.12.iter() {
assert_eq!(u32::from_le_bytes(*mem.take_n::<4>()), *expected as u32);
}
assert!(mem.is_empty());
// (list string)
mem = actual.ptr_len(memory, 8);
for expected in input.13.iter() {
let actual = mem.ptr_len(memory, 1);
assert_eq!(actual, expected.as_bytes());
}
assert!(mem.is_empty());
assert!(actual.is_empty());
Ok(())
}
#[test]
fn some_traps() -> Result<()> {
let middle_of_memory = i32::MAX / 2;
let component = format!(
r#"(component
(module $m
(memory (export "memory") 1)
(func (export "take-many") (param i32))
(func (export "take-list") (param i32 i32))
(func (export "canonical_abi_realloc") (param i32 i32 i32 i32) (result i32)
unreachable)
(func (export "canonical_abi_free") (param i32 i32 i32)
unreachable)
)
(instance $i (instantiate (module $m)))
(func (export "take-list-unreachable")
(canon.lift (func (param (list u8))) (into $i) (func $i "take-list"))
)
(func (export "take-string-unreachable")
(canon.lift (func (param string)) (into $i) (func $i "take-list"))
)
(type $t (func
(param string)
(param string)
(param string)
(param string)
(param string)
(param string)
(param string)
(param string)
(param string)
(param string)
))
(func (export "take-many-unreachable")
(canon.lift (type $t) (into $i) (func $i "take-many"))
)
(module $m2
(memory (export "memory") 1)
(func (export "take-many") (param i32))
(func (export "take-list") (param i32 i32))
(func (export "canonical_abi_realloc") (param i32 i32 i32 i32) (result i32)
i32.const {middle_of_memory})
(func (export "canonical_abi_free") (param i32 i32 i32)
unreachable)
)
(instance $i2 (instantiate (module $m2)))
(func (export "take-list-base-oob")
(canon.lift (func (param (list u8))) (into $i2) (func $i2 "take-list"))
)
(func (export "take-string-base-oob")
(canon.lift (func (param string)) (into $i2) (func $i2 "take-list"))
)
(func (export "take-many-base-oob")
(canon.lift (type $t) (into $i2) (func $i2 "take-many"))
)
(module $m3
(memory (export "memory") 1)
(func (export "take-many") (param i32))
(func (export "take-list") (param i32 i32))
(func (export "canonical_abi_realloc") (param i32 i32 i32 i32) (result i32)
i32.const 65535)
(func (export "canonical_abi_free") (param i32 i32 i32)
unreachable)
)
(instance $i3 (instantiate (module $m3)))
(func (export "take-list-end-oob")
(canon.lift (func (param (list u8))) (into $i3) (func $i3 "take-list"))
)
(func (export "take-string-end-oob")
(canon.lift (func (param string)) (into $i3) (func $i3 "take-list"))
)
(func (export "take-many-end-oob")
(canon.lift (type $t) (into $i3) (func $i3 "take-many"))
)
(module $m4
(memory (export "memory") 1)
(func (export "take-many") (param i32))
(global $cnt (mut i32) (i32.const 0))
(func (export "canonical_abi_realloc") (param i32 i32 i32 i32) (result i32)
global.get $cnt
if (result i32)
i32.const 100000
else
i32.const 1
global.set $cnt
i32.const 0
end
)
(func (export "canonical_abi_free") (param i32 i32 i32)
unreachable)
)
(instance $i4 (instantiate (module $m4)))
(func (export "take-many-second-oob")
(canon.lift (type $t) (into $i4) (func $i4 "take-many"))
)
)"#
);
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
// This should fail when calling the allocator function for the argument
let err = instance
.get_typed_func::<(&[u8],), (), _>(&mut store, "take-list-unreachable")?
.call(&mut store, (&[],))
.unwrap_err()
.downcast::<Trap>()?;
assert_eq!(err.trap_code(), Some(TrapCode::UnreachableCodeReached));
// This should fail when calling the allocator function for the argument
let err = instance
.get_typed_func::<(&str,), (), _>(&mut store, "take-string-unreachable")?
.call(&mut store, ("",))
.unwrap_err()
.downcast::<Trap>()?;
assert_eq!(err.trap_code(), Some(TrapCode::UnreachableCodeReached));
// This should fail when calling the allocator function for the space
// to store the arguments (before arguments are even lowered)
let err = instance
.get_typed_func::<(&str, &str, &str, &str, &str, &str, &str, &str, &str, &str), (), _>(
&mut store,
"take-many-unreachable",
)?
.call(&mut store, ("", "", "", "", "", "", "", "", "", ""))
.unwrap_err()
.downcast::<Trap>()?;
assert_eq!(err.trap_code(), Some(TrapCode::UnreachableCodeReached));
// Assert that when the base pointer returned by malloc is out of bounds
// that errors are reported as such. Both empty and lists with contents
// should all be invalid here.
//
// FIXME(WebAssembly/component-model#32) confirm the semantics here are
// what's desired.
#[track_caller]
fn assert_oob(err: &anyhow::Error) {
assert!(
err.to_string()
.contains("realloc return: beyond end of memory"),
"{:?}",
err,
);
}
let err = instance
.get_typed_func::<(&[u8],), (), _>(&mut store, "take-list-base-oob")?
.call(&mut store, (&[],))
.unwrap_err();
assert_oob(&err);
let err = instance
.get_typed_func::<(&[u8],), (), _>(&mut store, "take-list-base-oob")?
.call(&mut store, (&[1],))
.unwrap_err();
assert_oob(&err);
let err = instance
.get_typed_func::<(&str,), (), _>(&mut store, "take-string-base-oob")?
.call(&mut store, ("",))
.unwrap_err();
assert_oob(&err);
let err = instance
.get_typed_func::<(&str,), (), _>(&mut store, "take-string-base-oob")?
.call(&mut store, ("x",))
.unwrap_err();
assert_oob(&err);
let err = instance
.get_typed_func::<(&str, &str, &str, &str, &str, &str, &str, &str, &str, &str), (), _>(
&mut store,
"take-many-base-oob",
)?
.call(&mut store, ("", "", "", "", "", "", "", "", "", ""))
.unwrap_err();
assert_oob(&err);
// Test here that when the returned pointer from malloc is one byte from the
// end of memory that empty things are fine, but larger things are not.
instance
.get_typed_func::<(&[u8],), (), _>(&mut store, "take-list-end-oob")?
.call(&mut store, (&[],))?;
instance
.get_typed_func::<(&[u8],), (), _>(&mut store, "take-list-end-oob")?
.call(&mut store, (&[1],))?;
assert_oob(&err);
let err = instance
.get_typed_func::<(&[u8],), (), _>(&mut store, "take-list-end-oob")?
.call(&mut store, (&[1, 2],))
.unwrap_err();
assert_oob(&err);
instance
.get_typed_func::<(&str,), (), _>(&mut store, "take-string-end-oob")?
.call(&mut store, ("",))?;
instance
.get_typed_func::<(&str,), (), _>(&mut store, "take-string-end-oob")?
.call(&mut store, ("x",))?;
let err = instance
.get_typed_func::<(&str,), (), _>(&mut store, "take-string-end-oob")?
.call(&mut store, ("xy",))
.unwrap_err();
assert_oob(&err);
let err = instance
.get_typed_func::<(&str, &str, &str, &str, &str, &str, &str, &str, &str, &str), (), _>(
&mut store,
"take-many-end-oob",
)?
.call(&mut store, ("", "", "", "", "", "", "", "", "", ""))
.unwrap_err();
assert_oob(&err);
// For this function the first allocation, the space to store all the
// arguments, is in-bounds but then all further allocations, such as for
// each individual string, are all out of bounds.
let err = instance
.get_typed_func::<(&str, &str, &str, &str, &str, &str, &str, &str, &str, &str), (), _>(
&mut store,
"take-many-second-oob",
)?
.call(&mut store, ("", "", "", "", "", "", "", "", "", ""))
.unwrap_err();
assert_oob(&err);
Ok(())
}
#[test]
fn char_bool_memory() -> Result<()> {
let component = format!(
r#"(component
(module $m
(memory (export "memory") 1)
(func (export "ret-tuple") (param i32 i32) (result i32)
(local $base i32)
;; Allocate space for the return
(local.set $base
(call $realloc
(i32.const 0)
(i32.const 0)
(i32.const 4)
(i32.const 8)))
;; store the boolean
(i32.store offset=0
(local.get $base)
(local.get 0))
;; store the char
(i32.store offset=4
(local.get $base)
(local.get 1))
(local.get $base)
)
{REALLOC_AND_FREE}
)
(instance $i (instantiate (module $m)))
(func (export "ret-tuple")
(canon.lift (func (param u32) (param u32) (result (tuple bool char))) (into $i) (func $i "ret-tuple"))
)
)"#
);
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
let func = instance.get_typed_func::<(u32, u32), (bool, char), _>(&mut store, "ret-tuple")?;
let ret = func.call(&mut store, (0, 'a' as u32))?;
assert_eq!(ret, (false, 'a'));
let ret = func.call(&mut store, (1, '🍰' as u32))?;
assert_eq!(ret, (true, '🍰'));
assert!(func.call(&mut store, (2, 'a' as u32)).is_err());
assert!(func.call(&mut store, (0, 0xd800)).is_err());
Ok(())
}
#[test]
fn string_list_oob() -> Result<()> {
let component = format!(
r#"(component
(module $m
(memory (export "memory") 1)
(func (export "ret-list") (result i32)
(local $base i32)
;; Allocate space for the return
(local.set $base
(call $realloc
(i32.const 0)
(i32.const 0)
(i32.const 4)
(i32.const 8)))
(i32.store offset=0
(local.get $base)
(i32.const 100000))
(i32.store offset=4
(local.get $base)
(i32.const 1))
(local.get $base)
)
{REALLOC_AND_FREE}
)
(instance $i (instantiate (module $m)))
(func (export "ret-list-u8")
(canon.lift (func (result (list u8))) (into $i) (func $i "ret-list"))
)
(func (export "ret-string")
(canon.lift (func (result string)) (into $i) (func $i "ret-list"))
)
)"#
);
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
let ret_list_u8 = instance.get_typed_func::<(), WasmList<u8>, _>(&mut store, "ret-list-u8")?;
let ret_string = instance.get_typed_func::<(), WasmStr, _>(&mut store, "ret-string")?;
let err = ret_list_u8.call(&mut store, ()).err().unwrap();
assert!(err.to_string().contains("out of bounds"), "{}", err);
let err = ret_string.call(&mut store, ()).err().unwrap();
assert!(err.to_string().contains("out of bounds"), "{}", err);
Ok(())
}
#[test]
fn tuples() -> Result<()> {
let component = format!(
r#"(component
(module $m
(memory (export "memory") 1)
(func (export "foo")
(param i32 f64 i32)
(result i32)
local.get 0
i32.const 0
i32.ne
if unreachable end
local.get 1
f64.const 1
f64.ne
if unreachable end
local.get 2
i32.const 2
i32.ne
if unreachable end
i32.const 3
)
(func (export "canonical_abi_realloc") (param i32 i32 i32 i32) (result i32)
unreachable)
(func (export "canonical_abi_free") (param i32 i32 i32)
unreachable)
)
(instance $i (instantiate (module $m)))
(func (export "foo")
(canon.lift
(func
(param (tuple s32 float64))
(param (tuple s8))
(result (tuple u16))
)
(func $i "foo")
)
)
)"#
);
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
let foo = instance.get_typed_func::<((i32, f64), (i8,)), (u16,), _>(&mut store, "foo")?;
assert_eq!(foo.call(&mut store, ((0, 1.0), (2,)))?, (3,));
Ok(())
}
#[test]
fn option() -> Result<()> {
let component = format!(
r#"(component
(module $m
(memory (export "memory") 1)
(func (export "pass0") (param i32) (result i32)
local.get 0
)
(func (export "pass1") (param i32 i32) (result i32)
(local $base i32)
(local.set $base
(call $realloc
(i32.const 0)
(i32.const 0)
(i32.const 4)
(i32.const 8)))
(i32.store offset=0
(local.get $base)
(local.get 0))
(i32.store offset=4
(local.get $base)
(local.get 1))
(local.get $base)
)
(func (export "pass2") (param i32 i32 i32) (result i32)
(local $base i32)
(local.set $base
(call $realloc
(i32.const 0)
(i32.const 0)
(i32.const 4)
(i32.const 12)))
(i32.store offset=0
(local.get $base)
(local.get 0))
(i32.store offset=4
(local.get $base)
(local.get 1))
(i32.store offset=8
(local.get $base)
(local.get 2))
(local.get $base)
)
{REALLOC_AND_FREE}
)
(instance $i (instantiate (module $m)))
(func (export "option-unit-to-u32")
(canon.lift
(func (param (option unit)) (result u32))
(func $i "pass0")
)
)
(func (export "option-u8-to-tuple")
(canon.lift
(func (param (option u8)) (result (tuple u32 u32)))
(into $i)
(func $i "pass1")
)
)
(func (export "option-u32-to-tuple")
(canon.lift
(func (param (option u32)) (result (tuple u32 u32)))
(into $i)
(func $i "pass1")
)
)
(func (export "option-string-to-tuple")
(canon.lift
(func (param (option string)) (result (tuple u32 string)))
(into $i)
(func $i "pass2")
)
)
(func (export "to-option-unit")
(canon.lift
(func (param u32) (result (option unit)))
(func $i "pass0")
)
)
(func (export "to-option-u8")
(canon.lift
(func (param u32) (param u32) (result (option u8)))
(into $i)
(func $i "pass1")
)
)
(func (export "to-option-u32")
(canon.lift
(func (param u32) (param u32) (result (option u32)))
(into $i)
(func $i "pass1")
)
)
(func (export "to-option-string")
(canon.lift
(func (param u32) (param string) (result (option string)))
(into $i)
(func $i "pass2")
)
)
)"#
);
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
let option_unit_to_u32 =
instance.get_typed_func::<(Option<()>,), u32, _>(&mut store, "option-unit-to-u32")?;
assert_eq!(option_unit_to_u32.call(&mut store, (None,))?, 0);
assert_eq!(option_unit_to_u32.call(&mut store, (Some(()),))?, 1);
let option_u8_to_tuple = instance
.get_typed_func::<(Option<u8>,), (u32, u32), _>(&mut store, "option-u8-to-tuple")?;
assert_eq!(option_u8_to_tuple.call(&mut store, (None,))?, (0, 0));
assert_eq!(option_u8_to_tuple.call(&mut store, (Some(0),))?, (1, 0));
assert_eq!(option_u8_to_tuple.call(&mut store, (Some(100),))?, (1, 100));
let option_u32_to_tuple = instance
.get_typed_func::<(Option<u32>,), (u32, u32), _>(&mut store, "option-u32-to-tuple")?;
assert_eq!(option_u32_to_tuple.call(&mut store, (None,))?, (0, 0));
assert_eq!(option_u32_to_tuple.call(&mut store, (Some(0),))?, (1, 0));
assert_eq!(
option_u32_to_tuple.call(&mut store, (Some(100),))?,
(1, 100)
);
let option_string_to_tuple = instance.get_typed_func::<(Option<&str>,), (u32, WasmStr), _>(
&mut store,
"option-string-to-tuple",
)?;
let (a, b) = option_string_to_tuple.call(&mut store, (None,))?;
assert_eq!(a, 0);
assert_eq!(b.to_str(&store)?, "");
let (a, b) = option_string_to_tuple.call(&mut store, (Some(""),))?;
assert_eq!(a, 1);
assert_eq!(b.to_str(&store)?, "");
let (a, b) = option_string_to_tuple.call(&mut store, (Some("hello"),))?;
assert_eq!(a, 1);
assert_eq!(b.to_str(&store)?, "hello");
let to_option_unit =
instance.get_typed_func::<(u32,), Option<()>, _>(&mut store, "to-option-unit")?;
assert_eq!(to_option_unit.call(&mut store, (0,))?, None);
assert_eq!(to_option_unit.call(&mut store, (1,))?, Some(()));
let err = to_option_unit.call(&mut store, (2,)).unwrap_err();
assert!(err.to_string().contains("invalid option"), "{}", err);
let to_option_u8 =
instance.get_typed_func::<(u32, u32), Option<u8>, _>(&mut store, "to-option-u8")?;
assert_eq!(to_option_u8.call(&mut store, (0x00_00, 0))?, None);
assert_eq!(to_option_u8.call(&mut store, (0x00_01, 0))?, Some(0));
assert_eq!(to_option_u8.call(&mut store, (0xfd_01, 0))?, Some(0xfd));
assert!(to_option_u8.call(&mut store, (0x00_02, 0)).is_err());
let to_option_u32 =
instance.get_typed_func::<(u32, u32), Option<u32>, _>(&mut store, "to-option-u32")?;
assert_eq!(to_option_u32.call(&mut store, (0, 0))?, None);
assert_eq!(to_option_u32.call(&mut store, (1, 0))?, Some(0));
assert_eq!(
to_option_u32.call(&mut store, (1, 0x1234fead))?,
Some(0x1234fead)
);
assert!(to_option_u32.call(&mut store, (2, 0)).is_err());
let to_option_string = instance
.get_typed_func::<(u32, &str), Option<WasmStr>, _>(&mut store, "to-option-string")?;
let ret = to_option_string.call(&mut store, (0, ""))?;
assert!(ret.is_none());
let ret = to_option_string.call(&mut store, (1, ""))?;
assert_eq!(ret.unwrap().to_str(&store)?, "");
let ret = to_option_string.call(&mut store, (1, "cheesecake"))?;
assert_eq!(ret.unwrap().to_str(&store)?, "cheesecake");
assert!(to_option_string.call(&mut store, (2, "")).is_err());
Ok(())
}
#[test]
fn expected() -> Result<()> {
let component = format!(
r#"(component
(module $m
(memory (export "memory") 1)
(func (export "pass0") (param i32) (result i32)
local.get 0
)
(func (export "pass1") (param i32 i32) (result i32)
(local $base i32)
(local.set $base
(call $realloc
(i32.const 0)
(i32.const 0)
(i32.const 4)
(i32.const 8)))
(i32.store offset=0
(local.get $base)
(local.get 0))
(i32.store offset=4
(local.get $base)
(local.get 1))
(local.get $base)
)
(func (export "pass2") (param i32 i32 i32) (result i32)
(local $base i32)
(local.set $base
(call $realloc
(i32.const 0)
(i32.const 0)
(i32.const 4)
(i32.const 12)))
(i32.store offset=0
(local.get $base)
(local.get 0))
(i32.store offset=4
(local.get $base)
(local.get 1))
(i32.store offset=8
(local.get $base)
(local.get 2))
(local.get $base)
)
{REALLOC_AND_FREE}
)
(instance $i (instantiate (module $m)))
(func (export "take-expected-unit")
(canon.lift
(func (param (expected unit unit)) (result u32))
(func $i "pass0")
)
)
(func (export "take-expected-u8-f32")
(canon.lift
(func (param (expected u8 float32)) (result (tuple u32 u32)))
(into $i)
(func $i "pass1")
)
)
(type $list (list u8))
(func (export "take-expected-string")
(canon.lift
(func (param (expected string $list)) (result (tuple u32 string)))
(into $i)
(func $i "pass2")
)
)
(func (export "to-expected-unit")
(canon.lift
(func (param u32) (result (expected unit unit)))
(func $i "pass0")
)
)
(func (export "to-expected-s16-f32")
(canon.lift
(func (param u32) (param u32) (result (expected s16 float32)))
(into $i)
(func $i "pass1")
)
)
)"#
);
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
let take_expected_unit =
instance.get_typed_func::<(Result<(), ()>,), u32, _>(&mut store, "take-expected-unit")?;
assert_eq!(take_expected_unit.call(&mut store, (Ok(()),))?, 0);
assert_eq!(take_expected_unit.call(&mut store, (Err(()),))?, 1);
let take_expected_u8_f32 = instance
.get_typed_func::<(Result<u8, f32>,), (u32, u32), _>(&mut store, "take-expected-u8-f32")?;
assert_eq!(take_expected_u8_f32.call(&mut store, (Ok(1),))?, (0, 1));
assert_eq!(
take_expected_u8_f32.call(&mut store, (Err(2.0),))?,
(1, 2.0f32.to_bits())
);
let take_expected_string = instance
.get_typed_func::<(Result<&str, &[u8]>,), (u32, WasmStr), _>(
&mut store,
"take-expected-string",
)?;
let (a, b) = take_expected_string.call(&mut store, (Ok("hello"),))?;
assert_eq!(a, 0);
assert_eq!(b.to_str(&store)?, "hello");
let (a, b) = take_expected_string.call(&mut store, (Err(b"goodbye"),))?;
assert_eq!(a, 1);
assert_eq!(b.to_str(&store)?, "goodbye");
let to_expected_unit =
instance.get_typed_func::<(u32,), Result<(), ()>, _>(&mut store, "to-expected-unit")?;
assert_eq!(to_expected_unit.call(&mut store, (0,))?, Ok(()));
assert_eq!(to_expected_unit.call(&mut store, (1,))?, Err(()));
let err = to_expected_unit.call(&mut store, (2,)).unwrap_err();
assert!(err.to_string().contains("invalid expected"), "{}", err);
let to_expected_s16_f32 = instance
.get_typed_func::<(u32, u32), Result<i16, f32>, _>(&mut store, "to-expected-s16-f32")?;
assert_eq!(to_expected_s16_f32.call(&mut store, (0, 0))?, Ok(0));
assert_eq!(to_expected_s16_f32.call(&mut store, (0, 100))?, Ok(100));
assert_eq!(
to_expected_s16_f32.call(&mut store, (1, 1.0f32.to_bits()))?,
Err(1.0)
);
let ret = to_expected_s16_f32.call(&mut store, (1, CANON_32BIT_NAN | 1))?;
assert_eq!(ret.unwrap_err().to_bits(), CANON_32BIT_NAN);
assert!(to_expected_s16_f32.call(&mut store, (2, 0)).is_err());
Ok(())
}
#[test]
fn fancy_list() -> Result<()> {
let component = format!(
r#"(component
(module $m
(memory (export "memory") 1)
(func (export "take") (param i32 i32) (result i32)
(local $base i32)
(local.set $base
(call $realloc
(i32.const 0)
(i32.const 0)
(i32.const 4)
(i32.const 16)))
(i32.store offset=0
(local.get $base)
(local.get 0))
(i32.store offset=4
(local.get $base)
(local.get 1))
(i32.store offset=8
(local.get $base)
(i32.const 0))
(i32.store offset=12
(local.get $base)
(i32.mul
(memory.size)
(i32.const 65536)))
(local.get $base)
)
{REALLOC_AND_FREE}
)
(instance $i (instantiate (module $m)))
(type $a (option u8))
(type $b (expected unit string))
(type $input (list (tuple $a $b)))
(type $output (tuple u32 u32 (list u8)))
(func (export "take")
(canon.lift
(func (param $input) (result $output))
(into $i)
(func $i "take")
)
)
)"#
);
let engine = super::engine();
let component = Component::new(&engine, component)?;
let mut store = Store::new(&engine, ());
let instance = Instance::new(&mut store, &component)?;
let func = instance
.get_typed_func::<(&[(Option<u8>, Result<(), &str>)],), (u32, u32, WasmList<u8>), _>(
&mut store, "take",
)?;
let input = [
(None, Ok(())),
(Some(2), Err("hello there")),
(Some(200), Err("general kenobi")),
];
let (ptr, len, list) = func.call(&mut store, (&input,))?;
let memory = list.as_slice(&store);
let ptr = usize::try_from(ptr).unwrap();
let len = usize::try_from(len).unwrap();
let mut array = &memory[ptr..][..len * 16];
for (a, b) in input.iter() {
match a {
Some(val) => {
assert_eq!(*array.take_n::<2>(), [1, *val]);
}
None => {
assert_eq!(*array.take_n::<1>(), [0]);
array.skip::<1>();
}
}
array.skip::<2>();
match b {
Ok(()) => {
assert_eq!(*array.take_n::<1>(), [0]);
array.skip::<11>();
}
Err(s) => {
assert_eq!(*array.take_n::<1>(), [1]);
array.skip::<3>();
assert_eq!(array.ptr_len(memory, 1), s.as_bytes());
}
}
}
assert!(array.is_empty());
Ok(())
}
trait SliceExt<'a> {
fn take_n<const N: usize>(&mut self) -> &'a [u8; N];
fn skip<const N: usize>(&mut self) {
self.take_n::<N>();
}
fn ptr_len<'b>(&mut self, all_memory: &'b [u8], size: usize) -> &'b [u8] {
let ptr = u32::from_le_bytes(*self.take_n::<4>());
let len = u32::from_le_bytes(*self.take_n::<4>());
let ptr = usize::try_from(ptr).unwrap();
let len = usize::try_from(len).unwrap();
&all_memory[ptr..][..len * size]
}
}
impl<'a> SliceExt<'a> for &'a [u8] {
fn take_n<const N: usize>(&mut self) -> &'a [u8; N] {
let (a, b) = self.split_at(N);
*self = b;
a.try_into().unwrap()
}
}
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