New submission from Hood Chatham <roberthoodchat...@gmail.com>:
ctypes defines `CTYPES_MAX_ARGCOUNT` to be 1024: https://github.com/python/cpython/blob/6db2db91b96aaa1270c200ec931a2250fe2799c7/Modules/_ctypes/ctypes.h#L21 If a function call is attempted with more than 1024 arguments, it will fail. The libffi emscripten port github.com/hoodmane/libffi-emscripten can only support function calls with at most 122 arguments due to limitations in Emscripten / Wasm: https://github.com/emscripten-core/emscripten/pull/16653 I propose to allow the libffi port to define FFI_MAX_CLOSURE_ARGS and if this is defined then use this number instead for `CTYPES_MAX_ARGCOUNT`. https://github.com/libffi/libffi/issues/703 The test `test_callback_too_many_args` should also be updated to respect the value of `CTYPES_MAX_ARGCOUNT` rather than hardcoding 1024 into the test. ---------- components: ctypes messages: 416646 nosy: hoodchatham priority: normal severity: normal status: open title: Support libffi implementations that cannot support invocations with 1024 arguments _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue47208> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
