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Issue MoonchildProductions/UXP#2306: Add pref-gated WeakRef with safe stub when disabled

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* Add javascript.options.weakrefs and plumb it through context options, XPConnect, and workers
* Keep referents alive via strong tracing when the pref is off so deref() still returns the target
* Retain weak-edge semantics when the pref is enabled
This commit is contained in:
Basilisk-Dev 2025-12-17 16:35:41 -05:00 • committed by wuggy
commit 3cf82e2ca1
7 changed files with 32 additions and 8 deletions
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1
dom/workers/RuntimeService.cpp
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@ -301,6 +301,7 @@ LoadContextOptions(const char* aPrefName, void* /* aClosure */)
.setAsyncStack(GetWorkerPref<bool>(NS_LITERAL_CSTRING("asyncstack")))
.setWerror(GetWorkerPref<bool>(NS_LITERAL_CSTRING("werror")))
.setStreams(GetWorkerPref<bool>(NS_LITERAL_CSTRING("streams")))
.setWeakRefs(GetWorkerPref<bool>(NS_LITERAL_CSTRING("weakrefs")))
.setExtraWarnings(GetWorkerPref<bool>(NS_LITERAL_CSTRING("strict")))
.setArrayProtoValues(GetWorkerPref<bool>(
NS_LITERAL_CSTRING("array_prototype_values")));

1
dom/workers/WorkerPrefs.h
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@ -35,6 +35,7 @@ WORKER_SIMPLE_PREF("dom.serviceWorkers.openWindow.enabled", OpenWindowEnabled, O
WORKER_SIMPLE_PREF("dom.storageManager.enabled", StorageManagerEnabled, STORAGEMANAGER_ENABLED)
WORKER_SIMPLE_PREF("dom.push.enabled", PushEnabled, PUSH_ENABLED)
WORKER_SIMPLE_PREF("dom.streams.enabled", StreamsEnabled, STREAMS_ENABLED)
WORKER_SIMPLE_PREF("javascript.options.weakrefs", WeakRefsEnabled, WEAKREFS_ENABLED)
WORKER_SIMPLE_PREF("dom.requestcontext.enabled", RequestContextEnabled, REQUESTCONTEXT_ENABLED)
WORKER_SIMPLE_PREF("gfx.offscreencanvas.enabled", OffscreenCanvasEnabled, OFFSCREENCANVAS_ENABLED)
WORKER_SIMPLE_PREF("dom.webkitBlink.dirPicker.enabled", WebkitBlinkDirectoryPickerEnabled, DOM_WEBKITBLINK_DIRPICKER_WEBKITBLINK)