Convert usages of Instance::{func,dyn_func} to exports.get

lib/middleware-common-tests/benches/metering_benchmark.rs

@@ -190,7 +190,7 @@ fn bench_metering(c: &mut Criterion) {
             let module = compile_with(&wasm_binary, &compiler).unwrap();
             let import_object = imports! {};
             let instance = module.instantiate(&import_object).unwrap();
-            let add_to: Func<(i32, i32), i32> = instance.func("add_to").unwrap();
+            let add_to: Func<(i32, i32), i32> = instance.exports.get("add_to").unwrap();
             b.iter(|| black_box(add_to.call(100, 4)))
         })
         .with_function("Gas Metering", |b| {
@@ -203,7 +203,7 @@ fn bench_metering(c: &mut Criterion) {
                 },
             };
             let gas_instance = gas_module.instantiate(&gas_import_object).unwrap();
-            let gas_add_to: Func<(i32, i32), i32> = gas_instance.func("add_to").unwrap();
+            let gas_add_to: Func<(i32, i32), i32> = gas_instance.exports.get("add_to").unwrap();
             b.iter(|| black_box(gas_add_to.call(100, 4)))
         })
         .with_function("Built-in Metering", |b| {
@@ -215,7 +215,8 @@ fn bench_metering(c: &mut Criterion) {
                 .instantiate(&metering_import_object)
                 .unwrap();
             metering::set_points_used(&mut metering_instance, 0u64);
-            let metering_add_to: Func<(i32, i32), i32> = metering_instance.func("add_to").unwrap();
+            let metering_add_to: Func<(i32, i32), i32> =
+                metering_instance.exports.get("add_to").unwrap();
             b.iter(|| black_box(metering_add_to.call(100, 4)))
         }),
     );

lib/middleware-common-tests/src/lib.rs

@@ -103,7 +103,7 @@ mod tests {
 
         set_points_used(&mut instance, 0u64);
 
-        let add_to: Func<(i32, i32), i32> = instance.func("add_to").unwrap();
+        let add_to: Func<(i32, i32), i32> = instance.exports.get("add_to").unwrap();
 
         let cv_pushed = if let Some(msm) = instance.module.runnable_module.get_module_state_map() {
             push_code_version(CodeVersion {
@@ -145,7 +145,7 @@ mod tests {
 
         set_points_used(&mut instance, 0u64);
 
-        let add_to: Func<(i32, i32), i32> = instance.func("add_to").unwrap();
+        let add_to: Func<(i32, i32), i32> = instance.exports.get("add_to").unwrap();
 
         let cv_pushed = if let Some(msm) = instance.module.runnable_module.get_module_state_map() {
             push_code_version(CodeVersion {

lib/runtime-core-tests/tests/imports.rs

@@ -36,14 +36,14 @@ fn new_api_works() {
     assert_eq!(double.call(5).unwrap(), 10);
     let add_one: DynFunc = instance.exports.get("add_one").unwrap();
     assert_eq!(add_one.call(&[Value::I32(5)]).unwrap(), &[Value::I32(6)]);
-    let add_one_memory: Option<DynFunc> = instance.exports.get("my_global");
-    assert!(add_one_memory.is_none());
+    let add_one_memory: Result<DynFunc, _> = instance.exports.get("my_global");
+    assert!(add_one_memory.is_err());
 }
 
 macro_rules! call_and_assert {
     ($instance:ident, $function:ident( $( $inputs:ty ),* ) -> $output:ty, ( $( $arguments:expr ),* ) == $expected_value:expr) => {
         #[allow(unused_parens)]
-        let $function: Func<( $( $inputs ),* ), $output> = $instance.func(stringify!($function)).expect(concat!("Failed to get the `", stringify!($function), "` export function."));
+        let $function: Func<( $( $inputs ),* ), $output> = $instance.exports.get(stringify!($function)).expect(concat!("Failed to get the `", stringify!($function), "` export function."));
 
         let result = $function.call( $( $arguments ),* );
 

lib/runtime-core/src/instance.rs

@@ -934,6 +934,10 @@ pub struct Exports {
     module: Arc<ModuleInner>,
 }
 
+// this is safe because the lifetime of `Exports` is tied to `Instance` and
+// `*const InstanceInner` comes from a `Pin<Box<InstanceInner>>`
+unsafe impl Send for Exports {}
+
 impl Exports {
     /// Get an export.
     ///

lib/runtime/README.md

@@ -71,6 +71,7 @@ static WASM: &'static [u8] = &[
 
 use wasmer_runtime::{
     instantiate,
+    DynFunc,
     Value,
     imports,
     error,
@@ -83,7 +84,8 @@ fn main() -> error::Result<()> {
     let instance = instantiate(WASM, &import_object)?;
 
     let values = instance
-        .dyn_func("add_one")?
+        .exports
+        .get::<DynFunc>("add_one")?
         .call(&[Value::I32(42)])?;
 
     assert_eq!(values[0], Value::I32(43));

lib/runtime/benches/many_instances.rs

@@ -4,7 +4,7 @@ use criterion::Criterion;
 use tempfile::tempdir;
 use wasmer_runtime::{
     cache::{Cache, FileSystemCache, WasmHash},
-    compile, func, imports, instantiate, validate,
+    compile, func, imports, instantiate, validate, Func,
 };
 use wasmer_runtime_core::vm::Ctx;
 
@@ -71,7 +71,7 @@ fn calling_fn_benchmark(c: &mut Criterion) {
     );
     let instance = instantiate(SIMPLE_WASM, &imports).unwrap();
     c.bench_function("calling fn", move |b| {
-        let entry_point = instance.func::<i32, i32>("plugin_entrypoint").unwrap();
+        let entry_point: Func<i32, i32> = instance.exports.get("plugin_entrypoint").unwrap();
         b.iter(|| entry_point.call(2).unwrap())
     });
 }

lib/runtime/examples/call.rs

@@ -64,7 +64,7 @@ fn main() -> Result<(), error::Error> {
       },
     })?;
 
-    let foo: Func<(), i32> = instance.func("dbz")?;
+    let foo: Func<(), i32> = instance.exports.get("dbz")?;
 
     let result = foo.call();
 

lib/runtime/src/cache.rs

@@ -187,7 +187,7 @@ mod tests {
 
         let import_object = imports! {};
         let instance = cached_module.instantiate(&import_object).unwrap();
-        let add_one: Func<i32, i32> = instance.func("add_one").unwrap();
+        let add_one: Func<i32, i32> = instance.exports.get("add_one").unwrap();
 
         let value = add_one.call(42).unwrap();
 

lib/runtime/src/lib.rs

@@ -66,7 +66,7 @@
 //!
 //!     let mut instance = instantiate(WASM, &import_object)?;
 //!
-//!     let add_one: Func<i32, i32> = instance.func("add_one")?;
+//!     let add_one: Func<i32, i32> = instance.exports.get("add_one")?;
 //!
 //!     let value = add_one.call(42)?;
 //!

lib/runtime/tests/error_propagation.rs

@@ -36,7 +36,7 @@ fn error_propagation() {
         })
         .unwrap();
 
-    let foo: Func<(), ()> = instance.func("call_err").unwrap();
+    let foo: Func<(), ()> = instance.exports.get("call_err").unwrap();
 
     let result = foo.call();
 

lib/wasi-tests/src/lib.rs

@@ -35,7 +35,7 @@ fn serializing_works() {
     let state_bytes = {
         let instance = module.instantiate(&import_object).unwrap();
 
-        let start: Func<(), ()> = instance.func("_start").unwrap();
+        let start: Func<(), ()> = instance.exports.get("_start").unwrap();
         start.call().unwrap();
         let state = get_wasi_state(instance.context());
 
@@ -52,7 +52,7 @@ fn serializing_works() {
 
     instance.context_mut().data = Box::into_raw(wasi_state) as *mut c_void;
 
-    let second_entry: Func<(), i32> = instance.func("second_entry").unwrap();
+    let second_entry: Func<(), i32> = instance.exports.get("second_entry").unwrap();
     let result = second_entry.call().unwrap();
     assert_eq!(result, true as i32);
 }