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feat(asyncify): cumulative collision counters — fcsTotal + rootHotTotal in the STATE dump

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The 96-event recorder ring holds under a second of history at idle tick rate
(~110Hz), so settle-time collision pressure scrolls out before any poll can
read it — the prod dumps only caught the kill because the trap froze the
moment. Scroll-proof totals since boot: every finishContextSwitch increments
fcsTotal; every root entry inside a sleep-wake window increments rootHotTotal
(the fatal precondition). Both appear in the [wx-asyncify] STATE line, i.e.
in every trap auto-dump, every __wxAsyncifyDump() call, and every blue-screen
console — turning ANY prod load (crashing or clean) into a dose measurement
for the differential-repro experiment (which project ingredient generates
collision windows: siblings, 3D models, libs).

.ci-cache-epoch 7→8.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019SE4o46Lnq3hF574FFq8x4
This commit is contained in:
Gergő Törcsvári 2026-08-02 08:55:41 +02:00
commit 00b80a923f
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2 changed files with 9 additions and 1 deletions
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8
scripts/common/shims/handlesleep.js
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@ -52,6 +52,8 @@ if (typeof Asyncify !== "undefined") {
+ (F ? (" nextFiber=" + F.nextFiber
+ " trampolining=" + F.trampolineRunning
+ " root=" + F.__rootFiber
+ " fcsTotal=" + (F.__fcsTotal || 0)
+ " rootHotTotal=" + (F.__rootHotTotal || 0)
+ " valid=[" + (F.__validSuspensions ? Array.from(F.__validSuspensions).join(",") : "") + "]"
+ " parked=[" + (F.__internallyParked ? Array.from(F.__internallyParked).join(",") : "") + "]"
+ " deferrals=" + (F.__rootDeferrals || 0))
@ -286,6 +288,12 @@ if (typeof Fibers !== "undefined"
: function() {};
Fibers.finishContextSwitch = function(newFiber) {
// Cumulative, scroll-proof counters (the 96-event ring holds <1s at idle
// tick rate — differential-repro dose measurements need totals).
Fibers.__fcsTotal = (Fibers.__fcsTotal || 0) + 1;
if (newFiber === Fibers.__rootFiber && (Asyncify.__inSleepWake || 0) > 0) {
Fibers.__rootHotTotal = (Fibers.__rootHotTotal || 0) + 1;
}
__fcsRec("fcs old=" + (Asyncify.currData ? Asyncify.currData - 20 : 0)
+ " new=" + newFiber
+ (newFiber === Fibers.__rootFiber ? " ROOT" : "")