The default V8 platform uses Memory Protection Keys (pkeys) which
require all V8-using threads to be descendants of the thread that
called v8::Initialize. Tokio's spawn_blocking pool threads don't
satisfy this, causing SIGSEGV in WasmCodePointerTable during isolate
creation on x86_64 Linux.
Switch to new_unprotected_default_platform which relaxes the pkey
requirement. Also remove --single-threaded V8 flag (was degrading
performance without fixing the issue) and scope the creation mutex
to just JsRuntime::new() instead of the entire lifecycle.
See: https://github.com/denoland/deno_core/issues/952
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Work around a V8 bug in WasmCodePointerTable::AllocateUninitializedEntry()
that causes SIGSEGV when multiple isolates are created concurrently on
x86_64 Linux (https://github.com/denoland/deno_core/issues/952).
- Add V8_ISOLATE_CREATE_LOCK mutex to serialize JsRuntime::new() calls
- Replace oneshot channel with Arc<Mutex<Option<IsolateHandle>>> shared
between spawn_blocking and an IsolateDropGuard for proper cancellation
- Remove terminate_execution() call on dead isolate handle in error path
(was use-after-free: handle dereferenced after JsRuntime already dropped)
- Clear handle before drop(js_runtime) to prevent guard from terminating
a destroyed isolate
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* refactor: isolate deno_core into windmill-runtime-nativets subcrate
Remove deno_core from flow eval and isolate nativets V8 runtime into a
dedicated subcrate so deno_core compilation no longer blocks
windmill-worker or windmill-api.
- Create windmill-jseval crate: QuickJS-based JS eval for flow
expressions and batch rerun, extracted from windmill-worker
- Create windmill-runtime-nativets crate: all deno_core/V8 deps and
nativets script execution, with build.rs snapshot generation
- Simplify windmill-worker: remove all deno_* direct deps, empty
build.rs, gate nativets behind optional dep
- Update windmill-api: use windmill-jseval for batch rerun instead of
deno_core, remove deno_core feature entirely
- Add nativets integration tests (nativets_jobs.rs) and parallel
stress test (nativets_stress.rs, 8 workers x 200 jobs)
- Remove dead code: deno flow eval path, USE_QUICKJS env var,
parity tests (replaced with 63 standalone expected-value tests)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix: address PR review feedback for deno_core isolation
- Deduplicate unsafe_raw() into windmill-common/src/utils.rs (single source)
- Delete orphaned runtime.js and windmill-client.js from windmill-worker/src/
- Fix operator precedence in windmill-jseval with explicit parentheses
- Remove unnecessary return keyword in heap limit callback
- Remove redundant as usize casts
- Remove ~150 lines of commented-out code from runtime.js
- Remove commented-out #[cfg] in build.rs
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* otel ee
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
