3 Commits
Author SHA1 Message Date
jpmschweitzerandClaude b6eef3fc2b add a serial test lane for concurrency-vulnerable tests
Generalizes the pty split into an explicit "parallel=false" opt-out: a
`serial` tag (declared in dart_test.yaml). The parallel flutter run now
excludes `pty || serial`; a separate `flutter test --tags serial
--concurrency=1` pass runs the vulnerable ones. For the coverage gate the
two passes are real-merged by ci/merge_lcov.py (union DA, max hits, recompute
LF/LH) — a plain concat would double-count and corrupt the total.

Tag transcript_publisher's bus-republish test serial (it flaked in the
parallel pool). Gate verified green end-to-end at 95.08%.

T-193.

Co-Authored-By: Claude <noreply@anthropic.com>
2026-05-31 19:26:17 +02:00
jpmschweitzerandClaude Opus 4.7 b224502658 rename stale forkpty test tag to pty
test / unit + widget + golden + a11y (push) Failing after 32s
test / integration_test (xvfb) (push) Has been skipped
test / bundle smoke (xvfb 5s) (push) Has been skipped
test / daemon subprocess + web WASM smoke (push) Has been skipped
test / dart doc (lib API) (push) Failing after 36s
forkpty was replaced by posix_openpt + posix_spawn in T-96, but the
test tag, ci/test.sh segregation, and dart_test.yaml comment kept the
forkpty name. The segregation is still required — verified the PTY
tests fail under the flutter-test runner (the master fd doesn't
reliably deliver output there) but pass under dart test — only the
name was wrong. Rename to `pty` and correct the rationale comment.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-23 08:49:13 +02:00
jpmschweitzerandClaude Opus 4.7 8074bf4201 replace forkpty() with posix_openpt() + posix_spawn() (T-96)
`forkpty` calls `fork()` underneath. `fork()` in a multithreaded
process is unsafe: only the calling thread survives in the child,
but libc locks held by other threads remain "locked forever." With
the multi-threaded Dart VM as parent, ~5% of spawns deadlocked in
the child before `execve` (forensic probe: child stuck in S state
with comm=`DartWorker`, master fd never sees POLLIN).

`posix_spawn` uses `vfork` on glibc/musl/macOS, keeping the parent
suspended until execve completes — no Dart code runs in the child.
Pty pair built via the POSIX-standard `posix_openpt` / `grantpt` /
`unlockpt` / `ptsname` sequence. Probed: zero hangs in 300
sequential spawns vs ~5% before.

Behavior change: missing executable / missing workingDirectory now
surface as a `PtyException` thrown by `NativePty.start` rather than
a diagnostic written from the child to the slave PTY. Cleaner error
path for callers.

Side benefit: drops the `libutil.so.1` dynamic-library dependency.
PTY now resolves entirely against libc via `DynamicLibrary.process()`.

Splits the library-level `@Tags(['forkpty'])` on session_test.dart
into a per-test tag, so the now-runnable-under-flutter-test cases
contribute to coverage. `dart_test.yaml` declares the tag so the
exclude-tags filters honor it. Drops the `retry: 2` workaround from
the formerly-flaky registry test.

D-5 amended. Trims session-introduced CHANGELOG entries that were
over-verbose for the Keep-a-Changelog format.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-17 20:21:41 +02:00