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executor: Migrate wasmtime backend to a high-level API (#4686)

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* Migrate wasmtime backend to wasmtime-api

* Port to a newer version of wasmtime

* Update to the latest changes.

* Rejig the sandbox module a bit

* Materialze

* Fixes.

* executor wasm_runtime fix

* Refactor everything

* More refactoring

* Even more refactorings

* More cleaning.

* Update to the latest wasmtime

* Reformat

* Renames

* Refactoring and comments.

* Docs

* Rename FunctionExecutor to host.

* Imrpove docs.

* fmt

* Remove panic

* Assert the number of arguments are equal between wasmtime and hostfunc.

* Comment a possible panic if there is no corresponding value variant.

* Check signature of the entrypoint.

* Use git version of wasmtime

* Refine and doc the sandbox code.

* Comment RefCells.

* Update wasmtime to the latest-ish master.

This may solve a problem with segfaults.

* Apply suggestions from code review

Co-Authored-By: Tomasz Drwięga <tomusdrw@users.noreply.github.com>

* Use full SHA1 hash of wasmtime commit.

* Add a panic message.

* Add some documentation

* Update wasmtime version to include SIGSEGV fix

* Update to crates.io version of wasmtime

* Make it work.

* Move the creation of memory into `InstanceWrapper::new`

* Make `InstanceWrapper` !Send & !Sync

* Avoid using `take_mut`

* Update client/executor/wasmtime/Cargo.toml

Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com>

* Limit maximum size of memory.

* Rename `init_state` to `with_initialized_state`

Co-authored-by: Tomasz Drwięga <tomusdrw@users.noreply.github.com>
Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>
This commit is contained in:
Sergei Pepyakin
2020-02-13 14:54:19 +01:00
committed by GitHub
parent c871eaacbc
commit 49af986ad4
15 changed files with 1220 additions and 1376 deletions
Download Patch File Download Diff File Expand all files Collapse all files
substrate/client/executor/wasmi/src/lib.rs
+2 -10
View File
@@ -73,8 +73,7 @@ impl<'a> sandbox::SandboxCapabilities for FunctionExecutor<'a> {
invoke_args_len: WordSize,
state: u32,
func_idx: sandbox::SupervisorFuncIndex,
) -> Result<i64, Error>
{
) -> Result<i64, Error> {
let result = wasmi::FuncInstance::invoke(
dispatch_thunk,
&[
@@ -536,7 +535,6 @@ struct StateSnapshot {
data_segments: Vec<(u32, Vec<u8>)>,
/// The list of all global mutable variables of the module in their sequential order.
global_mut_values: Vec<RuntimeValue>,
heap_pages: u64,
}
impl StateSnapshot {
@@ -544,7 +542,6 @@ impl StateSnapshot {
fn take(
module_instance: &ModuleRef,
data_segments: Vec<DataSegment>,
heap_pages: u64,
) -> Option<Self> {
let prepared_segments = data_segments
.into_iter()
@@ -590,7 +587,6 @@ impl StateSnapshot {
Some(Self {
data_segments: prepared_segments,
global_mut_values,
heap_pages,
})
}
@@ -646,10 +642,6 @@ pub struct WasmiRuntime {
}
impl WasmRuntime for WasmiRuntime {
fn update_heap_pages(&mut self, heap_pages: u64) -> bool {
self.state_snapshot.heap_pages == heap_pages
}
fn host_functions(&self) -> &[&'static dyn Function] {
&self.host_functions
}
@@ -702,7 +694,7 @@ pub fn create_instance(
).map_err(|e| WasmError::Instantiation(e.to_string()))?;
// Take state snapshot before executing anything.
let state_snapshot = StateSnapshot::take(&instance, data_segments, heap_pages)
let state_snapshot = StateSnapshot::take(&instance, data_segments)
.expect(
"`take` returns `Err` if the module is not valid;
we already loaded module above, thus the `Module` is proven to be valid at this point;