The API breaking changes from future WASIX/Network/Threading addition

docs/migration_to_3.0.0.md

@@ -195,14 +195,13 @@ import_object.define("env", "host_function", host_function);
 let instance = Instance::new(&mut store, &module, &import_object).expect("Could not instantiate module.");
 ```
 
-For WASI, don't forget to import memory to `WasiEnv`
+For WASI, don't forget to initialize the `WasiEnv` (it will import the memory)
 
 ```rust
 let mut wasi_env = WasiState::new("hello").finalize()?;
 let import_object = wasi_env.import_object(&mut store, &module)?;
 let instance = Instance::new(&mut store, &module, &import_object).expect("Could not instantiate module.");
-let memory = instance.exports.get_memory("memory")?;
-wasi_env.data_mut(&mut store).set_memory(memory.clone());
+wasi_env.initialize(&mut store, &instance).unwrap();
 ```
 
 #### `ChainableNamedResolver` is removed

lib/api/Cargo.toml

@@ -26,6 +26,7 @@ indexmap = { version = "1.6" }
 cfg-if = "1.0"
 thiserror = "1.0"
 more-asserts = "0.2"
+bytes = "1"
 # - Optional shared dependencies.
 wat = { version = "1.0", optional = true }
 tracing = { version = "0.1", optional = true }

lib/api/src/js/module.rs

@@ -8,7 +8,9 @@ use crate::js::store::AsStoreMut;
 use crate::js::types::{AsJs, ExportType, ImportType};
 use crate::js::RuntimeError;
 use crate::AsStoreRef;
+use bytes::Bytes;
 use js_sys::{Reflect, Uint8Array, WebAssembly};
+use std::borrow::Cow;
 use std::fmt;
 use std::io;
 use std::path::Path;
@@ -48,6 +50,46 @@ pub struct ModuleTypeHints {
     pub exports: Vec<ExternType>,
 }
 
+pub trait IntoBytes {
+    fn into_bytes(self) -> Bytes;
+}
+
+impl IntoBytes for Bytes {
+    fn into_bytes(self) -> Bytes {
+        self
+    }
+}
+
+impl IntoBytes for Vec<u8> {
+    fn into_bytes(self) -> Bytes {
+        Bytes::from(self)
+    }
+}
+
+impl IntoBytes for &[u8] {
+    fn into_bytes(self) -> Bytes {
+        Bytes::from(self.to_vec())
+    }
+}
+
+impl<const N: usize> IntoBytes for &[u8; N] {
+    fn into_bytes(self) -> Bytes {
+        Bytes::from(self.to_vec())
+    }
+}
+
+impl IntoBytes for &str {
+    fn into_bytes(self) -> Bytes {
+        Bytes::from(self.as_bytes().to_vec())
+    }
+}
+
+impl IntoBytes for Cow<'_, [u8]> {
+    fn into_bytes(self) -> Bytes {
+        Bytes::from(self.to_vec())
+    }
+}
+
 /// A WebAssembly Module contains stateless WebAssembly
 /// code that has already been compiled and can be instantiated
 /// multiple times.
@@ -63,7 +105,7 @@ pub struct Module {
     // WebAssembly type hints
     type_hints: Option<ModuleTypeHints>,
     #[cfg(feature = "js-serializable-module")]
-    raw_bytes: Option<Vec<u8>>,
+    raw_bytes: Option<Bytes>,
 }
 
 impl Module {
@@ -199,7 +241,7 @@ impl Module {
             type_hints,
             name,
             #[cfg(feature = "js-serializable-module")]
-            raw_bytes: Some(binary.to_vec()),
+            raw_bytes: Some(binary.into_bytes()),
         })
     }
 
@@ -263,7 +305,7 @@ impl Module {
     /// can later process via [`Module::deserialize`].
     ///
     #[cfg(feature = "js-serializable-module")]
-    pub fn serialize(&self) -> Result<Vec<u8>, SerializeError> {
+    pub fn serialize(&self) -> Result<Bytes, SerializeError> {
         self.raw_bytes.clone().ok_or(SerializeError::Generic(
             "Not able to serialize module".to_string(),
         ))
@@ -276,8 +318,9 @@ impl Module {
     #[cfg(feature = "js-serializable-module")]
     pub unsafe fn deserialize(
         _store: &impl AsStoreRef,
-        bytes: &[u8],
+        bytes: impl IntoBytes,
     ) -> Result<Self, DeserializeError> {
+        let bytes = bytes.into_bytes();
         Self::new(_store, bytes).map_err(|e| DeserializeError::Compiler(e))
     }
 

lib/api/src/js/ptr.rs

@@ -71,7 +71,7 @@ impl<T, M: MemorySize> WasmPtr<T, M> {
 
     /// Get the offset into Wasm linear memory for this `WasmPtr`.
     #[inline]
-    pub fn offset(self) -> M::Offset {
+    pub fn offset(&self) -> M::Offset {
         self.offset
     }
 

lib/api/src/sys/function_env.rs

@@ -29,7 +29,7 @@ impl<T> FunctionEnv<T> {
     }
 
     /// Get the data as reference
-    pub fn as_ref<'a>(&self, store: &'a impl AsStoreMut) -> &'a T
+    pub fn as_ref<'a>(&self, store: &'a impl AsStoreRef) -> &'a T
     where
         T: Any + Send + 'static + Sized,
     {
@@ -105,6 +105,11 @@ impl<T: Send + 'static> FunctionEnvMut<'_, T> {
         self.func_env.as_mut(&mut self.store_mut)
     }
 
+    /// Borrows a new immmutable reference
+    pub fn as_ref(&self) -> FunctionEnv<T> {
+        self.func_env.clone()
+    }
+
     /// Borrows a new mutable reference
     pub fn as_mut(&mut self) -> FunctionEnvMut<'_, T> {
         FunctionEnvMut {

lib/api/src/sys/module.rs

@@ -1,6 +1,8 @@
 use crate::sys::InstantiationError;
 use crate::AsStoreMut;
 use crate::AsStoreRef;
+use bytes::Bytes;
+use std::borrow::Cow;
 use std::fmt;
 use std::io;
 use std::path::Path;
@@ -54,6 +56,46 @@ pub struct Module {
     module_info: Arc<ModuleInfo>,
 }
 
+pub trait IntoBytes {
+    fn into_bytes(self) -> Bytes;
+}
+
+impl IntoBytes for Bytes {
+    fn into_bytes(self) -> Bytes {
+        self
+    }
+}
+
+impl IntoBytes for Vec<u8> {
+    fn into_bytes(self) -> Bytes {
+        Bytes::from(self)
+    }
+}
+
+impl IntoBytes for &[u8] {
+    fn into_bytes(self) -> Bytes {
+        Bytes::from(self.to_vec())
+    }
+}
+
+impl<const N: usize> IntoBytes for &[u8; N] {
+    fn into_bytes(self) -> Bytes {
+        Bytes::from(self.to_vec())
+    }
+}
+
+impl IntoBytes for &str {
+    fn into_bytes(self) -> Bytes {
+        Bytes::from(self.as_bytes().to_vec())
+    }
+}
+
+impl IntoBytes for Cow<'_, [u8]> {
+    fn into_bytes(self) -> Bytes {
+        Bytes::from(self.to_vec())
+    }
+}
+
 impl Module {
     #[cfg(feature = "compiler")]
     /// Creates a new WebAssembly Module given the configuration
@@ -124,7 +166,6 @@ impl Module {
                 e
             )))
         })?;
-
         Self::from_binary(store, bytes.as_ref())
     }
 
@@ -206,8 +247,8 @@ impl Module {
     /// # Ok(())
     /// # }
     /// ```
-    pub fn serialize(&self) -> Result<Vec<u8>, SerializeError> {
-        self.artifact.serialize()
+    pub fn serialize(&self) -> Result<Bytes, SerializeError> {
+        self.artifact.serialize().map(|bytes| bytes.into())
     }
 
     /// Serializes a module into a file that the `Engine`
@@ -254,9 +295,10 @@ impl Module {
     /// ```
     pub unsafe fn deserialize(
         store: &impl AsStoreRef,
-        bytes: &[u8],
+        bytes: impl IntoBytes,
     ) -> Result<Self, DeserializeError> {
-        let artifact = store.as_store_ref().engine().deserialize(bytes)?;
+        let bytes = bytes.into_bytes();
+        let artifact = store.as_store_ref().engine().deserialize(&bytes)?;
         Ok(Self::from_artifact(artifact))
     }
 

lib/api/src/sys/ptr.rs

@@ -76,7 +76,7 @@ impl<T, M: MemorySize> WasmPtr<T, M> {
 
     /// Get the offset into Wasm linear memory for this `WasmPtr`.
     #[inline]
-    pub fn offset(self) -> M::Offset {
+    pub fn offset(&self) -> M::Offset {
         self.offset
     }
 

lib/c-api/src/wasm_c_api/module.rs

@@ -475,7 +475,7 @@ pub unsafe extern "C" fn wasm_module_deserialize(
 #[no_mangle]
 pub unsafe extern "C" fn wasm_module_serialize(module: &wasm_module_t, out: &mut wasm_byte_vec_t) {
     let byte_vec = c_try!(module.inner.serialize(); otherwise ());
-    out.set_buffer(byte_vec);
+    out.set_buffer(byte_vec.to_vec());
 }
 
 #[cfg(test)]

lib/cli/src/commands/inspect.rs

@@ -25,16 +25,11 @@ impl Inspect {
     fn inner_execute(&self) -> Result<()> {
         let (store, _compiler_type) = self.store.get_store()?;
         let module_contents = std::fs::read(&self.path)?;
-        let module = Module::new(&store, &module_contents)?;
-        println!(
-            "Type: {}",
-            if !is_wasm(&module_contents) {
-                "wat"
-            } else {
-                "wasm"
-            }
-        );
-        println!("Size: {}", ByteSize(module_contents.len() as _));
+        let iswasm = is_wasm(&module_contents);
+        let module_len = module_contents.len();
+        let module = Module::new(&store, module_contents)?;
+        println!("Type: {}", if !iswasm { "wat" } else { "wasm" });
+        println!("Size: {}", ByteSize(module_len as _));
         println!("Imports:");
         println!("  Functions:");
         for f in module.imports().functions() {

lib/cli/src/commands/run.rs

@@ -272,7 +272,7 @@ impl Run {
         let module_result: Result<Module> = if !self.disable_cache && contents.len() > 0x1000 {
             self.get_module_from_cache(&store, &contents, &compiler_type)
         } else {
-            Module::new(&store, &contents).map_err(|e| e.into())
+            Module::new(&store, contents).map_err(|e| e.into())
         };
         #[cfg(not(feature = "cache"))]
         let module_result = Module::new(&store, &contents);
@@ -319,7 +319,7 @@ impl Run {
                         warning!("cached module is corrupted: {}", err);
                     }
                 }
-                let module = Module::new(store, &contents)?;
+                let module = Module::new(store, contents)?;
                 // Store the compiled Module in cache
                 cache.store(hash, &module)?;
                 Ok(module)

lib/wasi/src/lib.rs

@@ -62,9 +62,11 @@ use wasmer_wasi_types::__WASI_CLOCK_MONOTONIC;
 use derivative::*;
 use std::ops::Deref;
 use thiserror::Error;
+use tracing::trace;
 use wasmer::{
-    imports, namespace, AsStoreMut, AsStoreRef, Exports, Function, FunctionEnv, Imports, Memory,
-    Memory32, MemoryAccessError, MemorySize, MemoryView, Module, TypedFunction,
+    imports, namespace, AsStoreMut, AsStoreRef, ExportError, Exports, Function, FunctionEnv,
+    Imports, Instance, Memory, Memory32, MemoryAccessError, MemorySize, MemoryView, Module,
+    TypedFunction,
 };
 
 pub use runtime::{
@@ -166,6 +168,33 @@ impl WasiFunctionEnv {
         self.env.as_mut(store)
     }
 
+    /// Initializes the WasiEnv using the instance exports
+    /// (this must be executed before attempting to use it)
+    /// (as the stores can not by themselves be passed between threads we can store the module
+    ///  in a thread-local variables and use it later - for multithreading)
+    pub fn initialize(
+        &mut self,
+        store: &mut impl AsStoreMut,
+        instance: &Instance,
+    ) -> Result<(), ExportError> {
+        // List all the exports and imports
+        for ns in instance.module().exports() {
+            //trace!("module::export - {} ({:?})", ns.name(), ns.ty());
+            trace!("module::export - {}", ns.name());
+        }
+        for ns in instance.module().imports() {
+            trace!("module::import - {}::{}", ns.module(), ns.name());
+        }
+
+        // First we get the malloc function which if it exists will be used to
+        // create the pthread_self structure
+        let memory = instance.exports.get_memory("memory")?.clone();
+        let env = self.data_mut(store);
+        env.set_memory(memory);
+
+        Ok(())
+    }
+
     /// Like `import_object` but containing all the WASI versions detected in
     /// the module.
     pub fn import_object_for_all_wasi_versions(

tests/compilers/serialize.rs

@@ -45,7 +45,7 @@ fn test_deserialize(config: crate::Config) -> Result<()> {
     let serialized_bytes = module.serialize()?;
 
     let headless_store = config.headless_store();
-    let deserialized_module = unsafe { Module::deserialize(&headless_store, &serialized_bytes)? };
+    let deserialized_module = unsafe { Module::deserialize(&headless_store, serialized_bytes)? };
     assert_eq!(deserialized_module.name(), Some("name"));
     assert_eq!(
         deserialized_module.exports().collect::<Vec<_>>(),