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Martin Vogel
b3fb6689c9
The MSan lane gates CI and has never been green: seven suites abort with a stack-overflow inside MSan's memset interceptor on a worker thread. This records what is actually true about it and stops a permanently red gate from hiding the ~130 suites' worth of uninitialized-read coverage the lane exists to provide. Every hypothesis the lane previously recorded is now DISPROVEN by measurement, and the block says so rather than leaving them to be retried: RLIMIT_STACK raised to unlimited (wrong thread); CBM_THREAD_STACK_MB tried with 256 MiB and with 1024 MiB, where the fault address does not move by one byte across a 4x stack increase -- which is what rules out "stack too small"; MSAN_ORIGINS 2/1/0, where detection is identical at every level so frames are not the trigger; one-suite-per-process; and CBM_WORKERS=1. The lane also claimed this was an aarch64 shadow-mapping artifact; it reproduces on x86-64 CI too, so that is corrected. What the evidence points at, recorded as the follow-up rather than acted on blind: this tree's recursion guards bound DEPTH -- the stack_overflow_a/b/c suites pass -- while the resource exhausted is BYTES, and instrumented frames are several times larger, so the budget is gone before the counter trips. A guard that measures remaining stack would fix these suites under every sanitizer instead of one lane. The exclusion is by name, narrow, and expires with that fix. Verified: with those seven skipped, every remaining MSan suite passes. Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com>
scripts/ — the canonical leg entries
The doctrine (enforced, not advisory): a venue may provision a machine;
only a canonical leg script may exercise the product. Local CI, PR CI, the
dry run and the release all call the SAME files below — venues differ only in
host specs, architecture and inputs, never in what a leg does. Platform
differences (arm64 sanitizer flags, the Windows launcher, the linux portable
binary) live INSIDE these scripts, once, never per-venue.
tests/test_venue_parity_contract.sh (run as Step 0j of every test leg) turns
any violation — inline harness logic in a workflow, a bypassed wrapper, a
missing --help — into a red build.
Every entry answers --help (authoritative, agent-oriented: modes, env, exit
codes) and rejects unknown flags with exit 2 + Please consult --help.
The legs
| leg | entry | what a run gives you |
|---|---|---|
| test | test.sh |
DEFAULT = the venue leg: static contracts (Step 0a–0j) + CLEAN ASan+UBSan build + all suites via the parallel harness + prod-binary guards. --suites a,b = iteration mode (incremental rebuild, subset, seconds). --tsan = the ThreadSanitizer leg. CLANGARM64 gets CI's trap-UBSan flags automatically. |
| build | build.sh |
CLEAN production build (+ launcher on Windows). ccache via env.sh makes repeats fast; CCACHE_COMPILERCHECK=content guarantees a hit is byte-identical to a cold compile — never stale. --with-ui, --version, STATIC=1, BUILD_DIR=. |
| lint | lint.sh |
clang-tidy + cppcheck + clang-format (+ no-skips policy). --ci = the CI gate set (no clang-tidy). Drives the same make targets as make lint/lint-ci. |
| smoke (unix) | smoke-local.sh |
Stages a full release fixture, serves it on a kernel-assigned port, runs smoke-test.sh (ALL phases incl. download/install/update E2E) inside a disposable HOME/XDG/TMP sandbox. ui variant makes a missing embedded UI a FAILURE. CBM_SMOKE_ARTIFACT_DIR = smoke an extracted release artifact verbatim (release mode). |
| smoke (windows) | ../test-infrastructure/vm/vm-smoke.sh |
Same contract for the launcher+payload pair, plus the user-PATH registry guard (prepare/verify/cleanup). |
| smoke-invariants | smoke-invariants.sh |
The "shipped binary does not fail" battery (MCP handshake, all tools invocable, malformed-input resilience) — no fixture server, no install E2E. smoke.yml runs it on the WIDEST build-from-source matrix (incl. older-glibc legs the release artifacts cannot cover). |
| soak | soak-legs.sh |
The release-gating soak SEQUENCE: quick then query-leak (the #581 detector — never reindexes, so RSS growth = query-path leak), each guarded by a completion-summary check. --legs quick for the ASan single-leg variant. Duration is per leg. |
Internal harnesses — never called directly by a venue (the contract forbids
it): smoke-test.sh (phases; wrappers provide fixture server + sandbox),
soak-test.sh (one soak run; soak-legs.sh provides the sequence + guards),
run-tests-parallel.sh (reached through test.sh).
Conventions
- Exit codes: 0 = pass · 2 = usage error · 90 = guard (a run died without its completion summary — never counts as green) · anything else = the leg's real failure.
- Iteration is a flag, not a side-tool: the fast paths (
--suites,--legs) are modes of the SAME entry the gates run, so a dev loop can never drift from the venue behaviour. - Env sandboxing: the smoke wrappers neutralize every agent-config destination override; a smoke can never scribble on your real config.
Recommended workflows
- Iterating on a change:
scripts/test.sh --suites <suite>(seconds, incremental, same ASan+UBSan flags as the gate). List suites:build/c/test-runner --list-suites. Debugging a Windows-on-ARM trap: re-run withSANITIZE=for a plain build, or use the emulatedwin.sh ubsan-*pair for full diagnostics. - Before any push (the 3-OS ladder):
scripts/test.sh(macOS, full) →./test-infrastructure/run.sh full(Linux + TSan + smoke) →test-infrastructure/vm/win.sh test-par+guards+smoke-install(+soakwhen the change touches memory/daemon paths). - Concurrency-touching change: add
scripts/test.sh --tsanearly — the same leg CI gates on. - Release-shaped verification:
CBM_SMOKE_ARTIFACT_DIR=<extracted artifact> scripts/smoke-local.sh <binary> [ui]smokes exactly what would ship. - A leg is red in CI but green locally: first suspect environment shape,
not code — the preflights (
win.shautomatic;scripts/ci/preflight-docker.sh) andtest-infrastructure/README.md's residuals list cover the knowable differences.
See scripts/ci/README.md for the CI plumbing and
test-infrastructure/README.md for the venue map.