Stabilize Android Harness ASan and view lifecycle tests

[mrousavy]

What changed

• wait for exact native onDropView and prepareForRecycle completion before asserting lifecycle state
• use fresh hybridRef callbacks as native prop-commit barriers
• publish lifecycle completion across threads with Android atomics and an iOS lock
• keep Default coverage on API 36 while running the legacy x86_64 ASan row on API 33
• give the 20 x 32 async HybridObject stress test an explicit 120-second deadline and the Android Harness job a 150-second outer timeout, without reducing its workload

Why

Harness rerender completion acknowledges the JavaScript render boundary, not the later Fabric mount transaction and ViewManager lifecycle work. The failing ASan job read the old prepare-for-recycle count during that gap. ASan widened the scheduling window, but the missing native completion barrier was a real race in the test and could also affect Default.

Separate zero-test failures were legacy ASan app_process startup crashes before Nitro loaded. API 33 plus NDK r29 contains both sides of Android's x86_64 sanitizer seccomp fix. Later Android versions are outside maintained ASan compatibility and exhibited stochastic startup crashes, so Default remains on API 36 while the legacy sanitizer row uses API 33.

Evidence:

• Android NDK issue 1298 and platform fix: [BUG] seccomp issues with asan on x86_64 API 27 android/ndk#1298 (comment)
• NDK r26 runtime fix, included in r29: https://github.com/android/ndk/wiki/Changelog-r26
• Android recommends HWASan as the long-term replacement: https://developer.android.com/ndk/guides/asan

The sanitizer run also exposed that the intentionally heavy async stress test inherited a 1.5-second helper deadline. Its workload is preserved, but its deadline now reflects sanitizer execution time.

Validation

• full local Android Harness suite: 544/544 passed
• focused local native view Harness suite: 8/8 passed
• Android Debug assembly with CI minSdk 26
• workspace TypeScript typecheck and targeted ESLint
• Kotlin and Swift format lint
• GitHub Actions workflow validation with actionlint
• modified iOS Swift module compilation
• API 33 configuration probe: https://github.com/mrousavy/nitro/actions/runs/32908462719

Follow-up to https://github.com/mrousavy/nitro/actions/runs/32504719667/job/96842180991?pr=1524.

Repeated Android Harness validation

All final-matrix Default and ASan jobs passed in three sequential workflow_dispatch runs:

• https://github.com/mrousavy/nitro/actions/runs/32909241009
• https://github.com/mrousavy/nitro/actions/runs/32909937474
• https://github.com/mrousavy/nitro/actions/runs/32910631876

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Project	Deployment	Actions	Updated (UTC)
nitro-docs	Ready	Preview	Aug 25, 2026 11:06pm

[mrousavy]

That kinda seems like a workaround, not a stable fix