https://github.com/python/cpython/commit/d4471297586335d8c24db8b2c030d32c94570344
commit: d4471297586335d8c24db8b2c030d32c94570344
branch: main
author: Gyeongjae Choi <[email protected]>
committer: freakboy3742 <[email protected]>
date: 2025-06-12T04:04:13Z
summary:
gh-128627: Fix iPad detection in wasm-gc (#135388)
On some iPad versions, Safari reports as "macOS". Modifies the GC trampoline
detection
to add a feature-based check to detect this case.
files:
M Python/emscripten_trampoline.c
diff --git a/Python/emscripten_trampoline.c b/Python/emscripten_trampoline.c
index cc5047d6bda224..975c28eec104c6 100644
--- a/Python/emscripten_trampoline.c
+++ b/Python/emscripten_trampoline.c
@@ -71,7 +71,16 @@ EM_JS(CountArgsFunc, _PyEM_GetCountArgsPtr, (), {
// )
function getPyEMCountArgsPtr() {
- let isIOS = globalThis.navigator &&
/iPad|iPhone|iPod/.test(navigator.platform);
+ // Starting with iOS 18.3.1, WebKit on iOS has an issue with the garbage
+ // collector that breaks the call trampoline. See #130418 and
+ // https://bugs.webkit.org/show_bug.cgi?id=293113 for details.
+ let isIOS = globalThis.navigator && (
+ /iPad|iPhone|iPod/.test(navigator.userAgent) ||
+ // Starting with iPadOS 13, iPads might send a platform string that
looks like a desktop Mac.
+ // To differentiate, we check if the platform is 'MacIntel' (common
for Macs and newer iPads)
+ // AND if the device has multi-touch capabilities
(navigator.maxTouchPoints > 1)
+ (navigator.platform === 'MacIntel' && typeof navigator.maxTouchPoints
!== 'undefined' && navigator.maxTouchPoints > 1)
+ )
if (isIOS) {
return 0;
}
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