cranelift

rust jit wasm webassembly runtime wasi cranelift sandbox wasmtime

Alex Crichton 90791a0e32 Reduce contention on the global module rwlock (#4041 ) * Reduce contention on the global module rwlock This commit intendes to close #4025 by reducing contention on the global rwlock Wasmtime has for module information during instantiation and dropping a store. Currently registration of a module into this global map happens during instantiation, but this can be a hot path as embeddings may want to, in parallel, instantiate modules. Instead this switches to a strategy of inserting into the global module map when a `Module` is created and then removing it from the map when the `Module` is dropped. Registration in a `Store` now preserves the entire `Module` within the store as opposed to trying to only save it piecemeal. In reality the only piece that wasn't saved within a store was the `TypeTables` which was pretty inconsequential for core wasm modules anyway. This means that instantiation should now clone a singluar `Arc` into a `Store` per `Module` (previously it cloned two) with zero managemnt on the global rwlock as that happened at `Module` creation time. Additionally dropping a `Store` again involves zero rwlock management and only a single `Arc` drop per-instantiated module (previously it was two). In the process of doing this I also went ahead and removed the `Module::new_with_name` API. This has been difficult to support historically with various variations on the internals of `ModuleInner` because it involves mutating a `Module` after it's been created. My hope is that this API is pretty rarely used and/or isn't super important, so it's ok to remove. Finally this change removes some internal `Arc` layerings that are no longer necessary, attempting to use either `T` or `&T` where possible without dealing with the overhead of an `Arc`. Closes #4025 * Move back to a `BTreeMap` in `ModuleRegistry`		3 years ago
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cli_tests	refactor: move Wasm test files to tests/all/cli_tests	3 years ago
debug	Skip generating DWARF info for dead code (#3498)	3 years ago
async_functions.rs	Use tokio::test instead of `dummy_waker` in tests (#3975)	3 years ago
call_hook.rs	Store the `ValRaw` type in little-endian format (#4035)	3 years ago
cli_tests.rs	Delete historical interruptable support in Wasmtime (#3925)	3 years ago
custom_signal_handler.rs	Upgrade all crates to the Rust 2021 edition (#3991)	3 years ago
epoch_interruption.rs	Use tokio::test instead of `dummy_waker` in tests (#3975)	3 years ago
externals.rs	Optimize `Func::call` and its C API (#3319)	3 years ago
fuel.rs	Add `Store::consume_fuel` to manually consume fuel (#3352)	3 years ago
fuel.wast	Implement limiting WebAssembly execution with fuel (#2611)	4 years ago
func.rs	Remove the old x86 backend	3 years ago
funcref.rs	Merge pull request from GHSA-gwc9-348x-qwv2	3 years ago
gc.rs	Merge pull request from GHSA-gwc9-348x-qwv2	3 years ago
globals.rs	Implement API support for v128-globals (#3147)	3 years ago
host_funcs.rs	Remove the module linking implementation in Wasmtime (#3958)	3 years ago
iloop.rs	Delete historical interruptable support in Wasmtime (#3925)	3 years ago
import_calling_export.rs	Optimize `Func::call` and its C API (#3319)	3 years ago
import_indexes.rs	Implement RFC 11: Redesigning Wasmtime's APIs (#2897)	3 years ago
instance.rs	Remove support for userfaultfd (#4040)	3 years ago
invoke_func_via_table.rs	Optimize `Func::call` and its C API (#3319)	3 years ago
limits.rs	Remove the `ModuleLimits` pooling configuration structure (#3837)	3 years ago
linker.rs	Remove the module linking implementation in Wasmtime (#3958)	3 years ago
main.rs	Merge pull request from GHSA-gwc9-348x-qwv2	3 years ago
memory.rs	Remove support for userfaultfd (#4040)	3 years ago
memory_creator.rs	Update to rustix 0.26.2. (#3521)	3 years ago
module.rs	Implement runtime checks for compilation settings (#3899)	3 years ago
module_serialize.rs	Implement runtime checks for compilation settings (#3899)	3 years ago
name.rs	Reduce contention on the global module rwlock (#4041)	3 years ago
pooling_allocator.rs	Remove support for userfaultfd (#4040)	3 years ago
relocs.rs	Remove the old x86 backend	3 years ago
stack_overflow.rs	Decrease default wasm stack to 512k from 1M (#3861)	3 years ago
store.rs	Implement RFC 11: Redesigning Wasmtime's APIs (#2897)	3 years ago
table.rs	Implement the memory64 proposal in Wasmtime (#3153)	3 years ago
traps.rs	Add a compilation section to disable address maps (#3598)	3 years ago
wast.rs	Remove the module linking implementation in Wasmtime (#3958)	3 years ago