Daemon lifecycle and Windows correctness, verified on a real Windows 11
ARM64 VM through the maintained test-infrastructure/vm drivers, plus the
macOS and Linux arm64 suites and the container lint gate.
Daemon lifecycle:
- daemon start/stop/status subcommands. `daemon start` launches a
PERMANENT daemon (spawn shape is byte-exact argv; survives idle
periods and session ends) and reports an already-active daemon
instead of failing. Permanence is honored at every stop latch:
last-committed-client disconnect, host initial-client window,
coordinator release, and application final-session close — a
permanent daemon also keeps admitting new sessions after its last
one closes.
- daemon stop refuses while sessions are active and lists the blocking
peers (pid/role) that must finish first; an idle daemon drains
through the activation-shutdown machinery with the ACK ordered after
connection interrupts. A second stop is idempotent. The wire ops are
no-cohort first-frame requests with peer fingerprint authentication,
so stop/status never conflict with an exact-build admission gate.
- One-shot CLI commands now execute through the daemon (index workers
keep their local supervised path). A cold CLI run that had to spawn a
temporary daemon prints a hint that `daemon start` removes the
per-command startup tax; a warm daemon is recycled silently.
- Hooks are connect-only fail-open: with no daemon present the hook
emits a visible, rate-limited notice (Claude-dialect systemMessage
plus stderr for other dialects) and always exits 0 — augmentation is
never allowed to block the caller's tool use.
- Version skew: a newer-build client automatically drains an
older-build permanent daemon (strict semantic-version triples only;
dev builds never auto-drain) and the build-conflict message names
`cbm daemon stop` as the manual escape hatch.
Windows IPC/runtime (real-VM verified):
- ipc(win): persistent pending overlapped ConnectNamedPipe. The accept
path used to destroy its listening pipe instance on every 20 ms poll
timeout; a client attaching in the teardown window was severed or left
on an orphaned pipe object whose HELLO no server handle could ever
read, absorbing the connect until the client's own timeout expired.
The pending connect now survives poll timeouts and nothing is
destroyed while a client could be attaching.
- ipc(win): drain-before-close for final responses. Closing a named-pipe
server handle can discard a just-sent response before the peer reads
it (POSIX stream sockets never lose buffered data on close). A bounded
cbm_daemon_ipc_connection_drain (read-until-peer-EOF; no-op on POSIX,
immediate on interrupted connections) now precedes close in
runtime_worker_finish and runtime_reject_inline, so hello-conflict,
capacity and disconnect acknowledgements reliably reach the peer.
- runtime: CLOSE_INTENT wire frame. A Windows named-pipe client has no
transport half-close, so close_begin now announces departure with an
explicit frame (ordered after APPLICATION_CANCEL, before the local
interrupt); the server releases the client's admission on receipt
instead of waiting for the handle to close. Admission-drop timing is
now identical to POSIX shutdown() semantics on every platform.
- runtime(win): client close cancellation. close_begin serializes with
request publication under the send lock, best-effort sends the active
token's APPLICATION_CANCEL frame, then interrupts local I/O; the
server cancels MCP/subprocess work promptly. Contract tests accept
both correct outcomes (interrupted transport or decoded CANCELLED).
- runtime: activation acknowledgement ordering. The activation ACK is
the requester's license to act on "snapshotted and draining", so every
connection interrupt is now initiated before the ACK is sent; a
session could previously get one more request serviced after the
requester observed the ACK.
- service(win): deadline-bounded private-file prepare. The conflict-log
prepare retry loop (100 x Sleep(2), which rounds up to the ~16 ms
timer granularity) burned ~1.6 s against permanently obstructed paths,
stalling hello rejections past the client's timeout. The retry budget
is now a 250 ms deadline; transient share collisions still retry.
- subprocess(win): cmd.exe /C payload encoder quotes metacharacters
correctly (root cause of the git-on-Windows failure cluster).
- watcher: SHA-256 buffer sizing (CBM_SZ_64 -> CBM_SZ_128) and a native
Windows stop/unwatch cancellation test with exact-image verification.
- httpd: send_all writes in bounded 64 KiB slices. A single giant
nonblocking send() on Windows is absorbed wholesale into AFD kernel
buffering regardless of SO_SNDBUF, so send deadlines and interrupts
could never engage against a slow peer (and the full payload was
pinned in nonpaged pool). Slicing restores a deterministic
backpressure point; a test hook pins SO_SNDBUF for the deadline and
interrupt tests.
- ui/http: shutdown lifecycle — interrupt checks, response-wide send
deadline, explicit connection states, refusal to free a server while
a listener-owned connection is active.
Windows long-path support:
- Central path-aware wide conversion (canonicalize via GetFullPathNameW
and prepend the extended-length prefix for absolute paths >=240) at
the compat chokepoints (cbm_fopen/compat_fs/mkstemp/mkdtemp), sqlite
store opens, and the daemon build-fingerprint/log paths. Deep managed
installs (a 64-hex generation directory routinely exceeds MAX_PATH)
now index, stage and activate correctly.
- activation transaction: its own file APIs and the component-walking
ancestry validators now operate in the extended-length namespace;
the launcher path is canonicalized (and prefixed when deep) once at
entry so every downstream exact-string comparison stays
form-consistent.
- Executable self-resolution uses the wide APIs (GetModuleFileNameW,
GetFileAttributesW) so non-ASCII install paths survive argv[0]
resolution.
Windows launcher install/uninstall transaction:
- FileRenameInfoEx names are NUL-terminated in an over-allocated
buffer. FileNameLength governs per the contract, but filter drivers
read FileName as NUL-terminated and appended adjacent heap bytes to
created names — a flaky, garbage-suffixed rename target. Both the CLI
and the launcher rename helpers are fixed.
- Uninstall retires state via rename-aside (.cbm ->
.cbm-retired-v1-<tag>-<pid>) with the retired tag shortened to 16 hex
chars so the bare rename target stays under the FileRenameInfoEx
NT-conversion ceiling at guard depths; 64 bits still uniquely
identify the generation.
- When the running launcher's mapped generation backings pin .cbm
against rename, the backings are relocated to activation-<pid>-N
.retired tombstones beside the install (a mapped image may be renamed,
never deleted; the launcher's liveness-guarded sweep reclaims stale
tombstones). Every relocation is recorded, and a FAILED uninstall
reverses the moves after restoring .cbm — via MoveFileExW with
extended-length paths on both arguments, since the deep generation
target is beyond the handle-based rename's bare-path reach — so a
restored install keeps its generation backings and stays runnable.
- After a committed uninstall the retired tree's backings are relocated
out so the tree is shallow enough for the detached cleanup's rd, and
the cleanup's working directory strips the extended-length prefix
(CreateProcessW lpCurrentDirectory silently ignores prefixed paths).
- Files created under Administrators-default-owner directories
(CopyFileW destinations, CREATE_NEW tombstones, probe directories)
are explicitly owner-stamped so the exact-owner validators hold on
runner images; guard fixtures stamp hand-built trees the same way.
Diagnostics, tests and infra:
- diagnostics: discovery is now an always-delivered JSON control record
(new cbm_log_control) that survives CBM_LOG_LEVEL suppression and
paths containing spaces; placement honors $TMPDIR with /tmp fallback
via a diagnostics-local helper; the soak parser reads the JSON record;
documented in docs/CONFIGURATION.md. Red-first coverage for suppressed
log levels, TMPDIR-with-spaces, and native Windows output-contract
assertions.
- tests(win): daemon_ipc/daemon_frontend fixtures now build endpoint
parents with production-shaped ancestry (LocalAppData on Windows, via
th_secure_runtime_parent_new) — the runtime ancestry validation
correctly refuses temp roots whose ancestors grant mutation rights to
Authenticated Users (C:/msys64/tmp, GitHub-runner work dirs) — and
drive the documented startup-owner publication flow before reading
generation-bound endpoint addresses. This turns the 26 Windows
failures previously visible in CI's full-test job green without
weakening any validation.
- tests(win): the launcher guard covers the full permanent-launcher
contract including failed-uninstall restore and immediate reinstall
after uninstall; new daemon lifecycle and reworked hook-augment
guards run the start/recycle/stop flow end to end.
- tests: CBM_SKIP_PERF is now actually consumed by the test runner
(it was set by CI but never read, so perf suites ran everywhere);
four throughput/bench suites are classified as perf, the heavy
store_arch suite moved to the slow-timeout tier, and two
wall-clock-sensitive assertions were rewritten as invariant checks
with coarse hang-detector backstops.
- build/test infra: build-dir safety contract, UI dev-proxy security
contract, soak daemon-recovery contract, path-safety helper, the
Windows VM worktree-sync contract wired into scripts/test.sh, and
vm/win.sh guards building its clean embedded-UI product in an
isolated BUILD_DIR so it cannot clobber the incremental test build.
provision-windows.sh now installs Node.js for the guards UI build.
Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com>
The CBM_WORKERS env tests called bare setenv/unsetenv, which are
POSIX-only and undeclared on the MSYS2 Windows test build. Switch to the
cbm_setenv/cbm_unsetenv compat wrappers (a no-op #define to setenv on
POSIX) and include foundation/compat.h. Fixes the test-windows build.
Inside a container, sysconf(_SC_NPROCESSORS_ONLN) and sysinfo() report
the host's CPU count and RAM, not the cgroup's effective quota — so
cbm_default_worker_count over-provisions workers and the mmap budget can
exceed the cgroup memory cap, driving OOMKills (#363).
detect_system_linux now reads the cgroup limits:
- cbm_detect_cgroup_cpus: cgroup v2 cpu.max, then v1 cpu.cfs_quota_us /
cpu.cfs_period_us → ceil(quota/period); -1 when unlimited.
- cbm_detect_cgroup_mem: cgroup v2 memory.max, then v1
memory.limit_in_bytes; 0 when unlimited or the v1 near-ULLONG_MAX
sentinel.
- Effective value is min(cgroup, host), guarding against mis-mounted
cgroups that report more than the host.
Helpers read via a bounded read_small_file (fopen "re", capped fread)
and are exposed through system_info_internal.h for unit tests that drive
them against a fake cgroup tree. The test teardown uses opendir/unlink/
rmdir (no shell spawn).
Distilled from #365 onto current main (unioned the test additions with
the CBM_WORKERS tests from #364, and replaced the test-cleanup
system("rm -rf") with a shell-free recursive remove). Closes#363
together with #364.
Adds a CBM_WORKERS env knob (clamped to [1, 256], invalid values warned
and ignored) that explicitly sets the parallel-indexing worker count.
In containers, sysconf(_SC_NPROCESSORS_ONLN) reports host CPUs rather
than the cgroup's effective quota, so a 1-vCPU pod on a 16-core node
otherwise spawns ~16 workers — the dominant OOMKill driver. When unset,
behaviour is unchanged.
From #364.
Complete C implementation of the indexing pipeline (src/), parallel worker
pool, graph buffer with merge support, SQLite writer, and 1893-test suite.
Linter setup: zero warnings from clang-tidy (all checks enabled, no NOLINT
suppressions), cppcheck, and clang-format. All issues fixed at source —
proper headers for external linkage, GROW_ARRAY macro restructured to
eliminate type parameter, null-deref paths guarded, named intermediates
for suspicious-argument checks.
Ertan