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* gh-128627: Use __builtin_wasm_test_function_pointer_signature for Emscripten ↵Hood Chatham2025-09-171-185/+26
| | | | | | | trampoline (#137470) With https://github.com/llvm/llvm-project/pull/150201 being merged, there is now a better way to generate the Emscripten trampoline, instead of including hand-generated binary WASM content. Requires Emscripten 4.0.12.
* gh-128627: Emscripten: Add missing semicolon in ios detection code (#135590)Hood Chatham2025-06-161-1/+1
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* gh-128627: Fix iPad detection in wasm-gc (#135388)Gyeongjae Choi2025-06-121-1/+10
| | | | | On some iPad versions, Safari reports as "macOS". Modifies the GC trampoline detection to add a feature-based check to detect this case.
* gh-106213: Shorten Emscripten wasm-gc trampoline by a little (#133984)Hood Chatham2025-05-201-37/+21
| | | Using the if instruction results in slightly shorter trampoline code.
* gh-128627: Skip wasm-gc on iOS Safari where it's broken (#130418)Łukasz Langa2025-02-231-3/+13
| | | | | | As of iOS 18.3.1, enabling wasm-gc breaks the interpreter. This disables the wasm-gc trampoline on iOS. Co-authored-by: Hood Chatham <roberthoodchatham@gmail.com>
* gh-128627: Emscripten: Fix address calculation for wasm-gc trampoline (#128782)Hood Chatham2025-01-231-9/+7
| | | | Modifies the memory calculation to divide the entire memory address by 4, not just the base address.
* gh-128627: Emscripten: Use wasm-gc based call adaptor if available (#128628)Hood Chatham2025-01-121-52/+177
| | | | | | Replaces the trampoline mechanism in Emscripten with an implementation that uses a recently added feature of wasm-gc instead of JS type reflection, when that feature is available.
* gh-121698 Emscripten: Use updated WebAssembly type reflection proposal ↵Hood Chatham2024-07-141-2/+12
| | | | (GH-121699)
* gh-106213: Make Emscripten trampolines work with JSPI (GH-106219)Hood Chatham2023-09-151-0/+82
There is a WIP proposal to enable webassembly stack switching which have been implemented in v8: https://github.com/WebAssembly/js-promise-integration It is not possible to switch stacks that contain JS frames so the Emscripten JS trampolines that allow calling functions with the wrong number of arguments don't work in this case. However, the js-promise-integration proposal requires the [type reflection for Wasm/JS API](https://github.com/WebAssembly/js-types) proposal, which allows us to actually count the number of arguments a function expects. For better compatibility with stack switching, this PR checks if type reflection is available, and if so we use a switch block to decide the appropriate signature. If type reflection is unavailable, we should use the current EMJS trampoline. We cache the function argument counts since when I didn't cache them performance was negatively affected. Co-authored-by: T. Wouters <thomas@python.org> Co-authored-by: Brett Cannon <brett@python.org>
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