Companion to kicad f0ce20ef64 (libcontext swap_suspended guard), which this
pins. The v0.1.20 diagnostics decoded the crash that survived v0.1.13–19:
TOOL_MANAGER Resume()s a coroutine whose body is asyncify-parked inside
handleSleep, the swap rewinds the stale fiber suspension, and the runtime is
poisoned. Full chain of evidence in docs/features/async/16-fiber-resume-guard.md
(+ round-3 addendum in 15-timer-park-repro.md).
- wasm/bindings/fiber_park.h + kicadTestFiberPark{Start,Prime,Poke,State}
exports (pcbnew + merged kicad_editor): stages Call→yield→legitimate
resume→sleep park→mid-park Resume, the exact prod state machine. The
first yield matters: it primes a real (then stale) suspension, matching
long-lived tool loops rather than a first-slice park.
- tests/kicad/fiber-resume-park.spec.ts: asserts the healthy contract on
polled state only (embind returns across fiber swaps are unwind
placeholders). RED on the unguarded build — fiber/sleep buffer
cross-restores, a jump-ghost beacon, the parked body zombified. GREEN with
the guard: mid-park poke refused ([collab-fcontext] jump-refused beacon),
park completes, post-yield resume works, no trap signatures.
- Regression sweep green: timer-park-repro, collab-load-fuzz, load-pcb,
pcbnew-collab, collab-undo, eeschema-collab (19 passed).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019SE4o46Lnq3hF574FFq8x4
kicadTestArmTimerPark(delayMs, parkMs): a one-shot wxTimer whose Notify()
emscripten_sleep()s, entering through the exact GAL-refresh-timer path
(emscripten_async_call → TimerCallbackFunc::Run → dispatch guard → Notify) —
the fresh-entry-that-parks the prod board-load trap family needs. Pollable
kicadTestTimerParkState(); inert unless armed. Registered beside
kicadTestSetOpenPark in pcbnew + the merged kicad_editor image.
tests/kicad/timer-park-repro.spec.ts drives four escalating cycles (park
only, 2× + fiber hammering, + 256MB heap growth mid-park) and asserts the
runtime survives every rewind AND that the [wx-asyncify] diagnostics observed
the window — engagement is asserted, so a run where the lever never created
the overlap cannot pass vacuously.
Result so far (docs/features/async/15-timer-park-repro.md): GREEN through
both rounds — genuine double-parks, live currData cross-restores, fiber
swaps, and mid-park heap growth are all handled by the shim + runtime. The
prod trap needs an ingredient this window still lacks (ranked in the doc);
the spec stays as the regression gate for whatever the eventual fix is.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019SE4o46Lnq3hF574FFq8x4
Replace the legacy Emscripten JS-exceptions model with native wasm-EH (legacy
encoding) across the whole build, keeping Asyncify coroutines working via a
from-source Binaryen --hoist-cpp-catches pre-pass. Net result: native-EH is the
only build mode, the 3D viewer is on by default, and pcbnew shrinks substantially.
Highlights:
- Binaryen submodule everywhere + --hoist-cpp-catches integration in apply-asyncify;
post-link Asyncify covers every app wasm (not just standalone test wasm).
- Build deps (incl. OpenCASCADE without OCC_CONVERT_SIGNALS) and all KiCad apps
with -fwasm-exceptions; emscripten_sleep added to the post-link asyncify-imports.
- libcontext fiber entry wired under native exceptions; while-loop main loop +
currData shim injected into all wx apps.
- Native-EH collab apply fixed: DEBUG-define the embind TU + match all out-of-CMake
C++ TUs' ABI flags to the core, fixing the vtable-layout skew / mis-dispatch.
- 3D viewer enabled by default (real raytracer linked, not the stub).
- Retire the EH-spike scaffolding; flip the asyncify-races ablation pins to
shim-redundancy pins (native-EH stays clean with the legacy shims ablated).
- Fix the asyncify-races quiescence check to not require Asyncify.currData==0:
under the native-EH per-frame-yield top loop the main stack is asyncify-suspended
every frame, so currData legitimately churns (a freed-but-not-yet-nulled buffer,
not a leak). Refresh the pcbnew toolbar screenshot baseline for the new kicad.
- CI: drop the obsolete binaryen_version input/env (the build uses the binaryen
submodule fork's wasm-opt, not a version download); key the wasm-output cache on
the binaryen submodule SHA instead.
Bumps the wxwidgets + binaryen submodules to their squashed feature commits.
Validated green: all 7 apps native-EH (real 3D in pcbnew); KiCad e2e 63/63
Firefox + Chromium (3D viewer renders); wx 336; coroutine 34/34 both engines;
asyncify 7/7 both engines.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Submodule pointer bump for the wxMenuBar dangling-child fix that resolved the 18 DOM-port kicad e2e failures. Also adds the async-debug dossier (docs/features/async/08-10) root-causing the 'indirect call to null' / 'signature mismatch' family to the menu-bar use-after-free, and folds the asyncify harness into 'npm test' (new test:wx for wx-only); tests/README + WHATWORKS updated to match.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The asyncify single-slot work, executed red-green (full ledger:
docs/features/asyncify-arbiter/redgreen.md; decisions record:
docs/features/async/07-decisions-and-outcome.md):
- tests/apps/standalone/asyncify-races/ + tests/asyncify/ + dedicated
playwright config: 8 scenarios reproducing the KiCad asyncify failure
family with the kicad-faithful startup topology (pre-park fiber swap →
park throw through the live trampoline). Built in 3 variants; the
SHIM_DISABLE_TRAMPOLINE_HEAL / SHIM_DISABLE_HANDLESLEEP ablation builds
keep the historical hang and index-out-of-bounds crash reproducible
forever (mutation-style pins for the existing shims).
- scripts/common/shims/handlesleep.js: catch the "unwind" park sentinel
in the wakeUp path — when main's last pre-park suspension was a sleep,
the main-loop park throw escaped through that sleep's promise reaction
as an uncaught rejection (the calculator/gerbview console errors).
- scripts/common/inject-dyncall-shims.sh: SHIM_DISABLE_* ablation knobs.
- Spec tightening (the acceptance bar): 'uncaught exception: unwind'
tolerance DELETED from pcbnew/eeschema specs; load-pcb gained a hard
clean-console gate over 5 asyncify corruption signatures.
- wxwidgets pointer bump: modal LIFO resolvers, pump resolve-on-error,
sync clipboard IsSupported (014f67e6c1).
Final state: asyncify suite 7/7, wx e2e 291/292 (1 skip), KiCad e2e 40
passed / 2 skipped with ZERO corruption signatures in any log across all
six apps.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Two research dossiers under docs/features:
- async/: Asyncify currData contention — the clipboard crash and post-idle
tool hang as one disease (single global suspension slot, three producers),
asyncify internals walkthroughs, prior art, arbiter designs A/B.
- wasm-exceptions/: -fexceptions vs -fwasm-exceptions — measured invoke-driven
share of the asyncify tax on pcbnew (59% raw / 64% gzip; download 64.5->36 MB
if migrated), KiCad dialog-in-catch audit (85 direct / 93 review of 636,
catch_audit.py included), binaryen toolchain status (partial EH support since
v125; TryTable unsupported), and a catch-arm-hoisting pre-pass design that
would obsolete the KiCad-side refactor. Cross-linked with the parked
KICAD_WASM_EH end-to-end experiment (docs/wasm-exceptions-experiment.md).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
