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mailbox S6: shutdown() in the shim + unit gates; bump wxwidgets

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Shim shutdown: dead latch, queue rejection/drop with beacons, pump
stops, idempotent. Gates: shim units 11/11, asyncify 9/9, coroutine
39/39, wx modal-heavy 45/45, kicad 6/6 — all on DEFAULT-injected glue
(docker postprocess -> setup:kicad now yields scheduler builds
without manual conversion).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TfxKn5utcntBSnxz4ZnYKs
This commit is contained in:
Gergő Törcsvári 2026-08-05 17:46:28 +02:00
commit 9bc4da89ff
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4 changed files with 92 additions and 1 deletions
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38
scripts/common/shims/asyncify-scheduler.js
View file

@ -38,6 +38,7 @@ if (typeof Asyncify !== "undefined" && !globalThis.__wxSchedulerInstalled) {
enqueueAfter: function (fn, arg, ms) {
var self = this;
setTimeout(function () {
if (self.dead) return; // S6: never deliver into a torn-down app
self.mailbox.push({ fn: fn, arg: arg });
self.enqueued++;
self._armDeliveryTick();
@ -56,6 +57,7 @@ if (typeof Asyncify !== "undefined" && !globalThis.__wxSchedulerInstalled) {
this._tickArmed = true;
var self = this;
setTimeout(function tick() {
if (self.dead) { self._tickArmed = false; return; }
try {
if (Module["_wxWasmMailboxTick"]) Module["_wxWasmMailboxTick"]();
} catch (e) {
@ -123,6 +125,7 @@ if (typeof Asyncify !== "undefined" && !globalThis.__wxSchedulerInstalled) {
? function () { return performance.now(); }
: function () { return Date.now(); };
setTimeout(function pump() {
if (self.dead) { self._mutatorPumpArmed = false; return; }
// Unkillable: an exception escaping this body would end the setTimeout
// chain and wedge the queue forever (observed: 559 frozen messages).
try {
@ -222,8 +225,42 @@ if (typeof Asyncify !== "undefined" && !globalThis.__wxSchedulerInstalled) {
try { return fn(); } finally { this._authorizedWrite--; }
},
// --- S6 lifetime --------------------------------------------------------
// Called when the wx main loop exits (DoRun's top-level return path). The
// app object is about to be destroyed: delivering anything after this
// point runs callbacks into freed C++ state. Queued mutators reject,
// queued messages and wakes drop — loudly, so a teardown that strands
// work is visible in the console instead of surfacing as a later UAF.
dead: false,
shutdown: function (reason) {
if (this.dead) return;
this.dead = true;
var stranded = {
mailbox: this.mailbox.length,
mutators: this.mutatorQueue.length,
wakes: this.readyWakes.length,
waits: this.waits.size,
};
this.mailbox.length = 0;
for (var i = 0; i < this.mutatorQueue.length; i++) {
try { this.mutatorQueue[i].reject(new Error("[wx-scheduler] shutdown: " + reason)); } catch (e) {}
}
this.mutatorQueue.length = 0;
this.readyWakes.length = 0;
if (stranded.mailbox || stranded.mutators || stranded.wakes || stranded.waits) {
console.warn("[wx-scheduler] shutdown (" + reason + ") stranded:"
+ " mailbox=" + stranded.mailbox
+ " mutators=" + stranded.mutators
+ " wakes=" + stranded.wakes
+ " pendingWaits=" + stranded.waits);
} else {
console.log("[wx-scheduler] shutdown (" + reason + ") clean");
}
},
state: function () {
return "[wx-scheduler] build=1 impl=S2-core"
+ (this.dead ? " DEAD" : "")
+ " mailbox=" + this.mailbox.length
+ " enqueued=" + this.enqueued
+ " delivered=" + this.delivered
@ -355,6 +392,7 @@ if (typeof Asyncify !== "undefined" && !globalThis.__wxSchedulerInstalled) {
var self = this;
setTimeout(function () {
self._wakeDrainArmed = false;
if (self.dead) return; // S6: parked stacks are gone with the app
// Deliver from a CLEAN macrotask (export stack empty by construction).
while (self.readyWakes.length > 0 && __transitionFree()) {
var w = self.readyWakes.shift();