54c07d8f16
* Implement defining host functions at the Config level. This commit introduces defining host functions at the `Config` rather than with `Func` tied to a `Store`. The intention here is to enable a host to define all of the functions once with a `Config` and then use a `Linker` (or directly with `Store::get_host_func`) to use the functions when instantiating a module. This should help improve the performance of use cases where a `Store` is short-lived and redefining the functions at every module instantiation is a noticeable performance hit. This commit adds `add_to_config` to the code generation for Wasmtime's `Wasi` type. The new method adds the WASI functions to the given config as host functions. This commit adds context functions to `Store`: `get` to get a context of a particular type and `set` to set the context on the store. For safety, `set` cannot replace an existing context value of the same type. `Wasi::set_context` was added to set the WASI context for a `Store` when using `Wasi::add_to_config`. * Add `Config::define_host_func_async`. * Make config "async" rather than store. This commit moves the concept of "async-ness" to `Config` rather than `Store`. Note: this is a breaking API change for anyone that's already adopted the new async support in Wasmtime. Now `Config::new_async` is used to create an "async" config and any `Store` associated with that config is inherently "async". This is needed for async shared host functions to have some sanity check during their execution (async host functions, like "async" `Func`, need to be called with the "async" variants). * Update async function tests to smoke async shared host functions. This commit updates the async function tests to also smoke the shared host functions, plus `Func::wrap0_async`. This also changes the "wrap async" method names on `Config` to `wrap$N_host_func_async` to slightly better match what is on `Func`. * Move the instance allocator into `Engine`. This commit moves the instantiated instance allocator from `Config` into `Engine`. This makes certain settings in `Config` no longer order-dependent, which is how `Config` should ideally be. This also removes the confusing concept of the "default" instance allocator, instead opting to construct the on-demand instance allocator when needed. This does alter the semantics of the instance allocator as now each `Engine` gets its own instance allocator rather than sharing a single one between all engines created from a configuration. * Make `Engine::new` return `Result`. This is a breaking API change for anyone using `Engine::new`. As creating the pooling instance allocator may fail (likely cause is not enough memory for the provided limits), instead of panicking when creating an `Engine`, `Engine::new` now returns a `Result`. * Remove `Config::new_async`. This commit removes `Config::new_async` in favor of treating "async support" as any other setting on `Config`. The setting is `Config::async_support`. * Remove order dependency when defining async host functions in `Config`. This commit removes the order dependency where async support must be enabled on the `Config` prior to defining async host functions. The check is now delayed to when an `Engine` is created from the config. * Update WASI example to use shared `Wasi::add_to_config`. This commit updates the WASI example to use `Wasi::add_to_config`. As only a single store and instance are used in the example, it has no semantic difference from the previous example, but the intention is to steer users towards defining WASI on the config and only using `Wasi::add_to_linker` when more explicit scoping of the WASI context is required.
54 lines
1.1 KiB
Rust
54 lines
1.1 KiB
Rust
mod async_functions;
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mod cli_tests;
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mod custom_signal_handler;
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mod debug;
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mod externals;
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mod fuel;
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mod func;
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mod fuzzing;
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mod globals;
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mod host_funcs;
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mod iloop;
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mod import_calling_export;
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mod import_indexes;
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mod instance;
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mod invoke_func_via_table;
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mod linker;
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mod memory_creator;
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mod module;
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mod module_linking;
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mod module_serialize;
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mod name;
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mod pooling_allocator;
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mod stack_overflow;
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mod table;
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mod traps;
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mod use_after_drop;
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mod wast;
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// TODO(#1886): Cranelift only supports reference types on x64.
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#[cfg(target_arch = "x86_64")]
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mod funcref;
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#[cfg(target_arch = "x86_64")]
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mod gc;
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/// A helper to compile a module in a new store with reference types enabled.
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#[cfg(target_arch = "x86_64")]
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pub(crate) fn ref_types_module(
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source: &str,
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) -> anyhow::Result<(wasmtime::Store, wasmtime::Module)> {
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use wasmtime::*;
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let _ = env_logger::try_init();
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let mut config = Config::new();
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config.wasm_reference_types(true);
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let engine = Engine::new(&config)?;
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let store = Store::new(&engine);
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let module = Module::new(&engine, source)?;
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Ok((store, module))
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}
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