8fe7c8bea65ec3b3f41a2dab9fefd15c59e12e16
7 Commits
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Joseph Doherty
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23d59d73f2 |
fix(scripting+alarms): close remaining re-review findings
Single commit covering the four small/medium fixes from the updated code review. Core.Scripting-014 (Medium, Concurrency): CompiledScriptCache.Clear() used the key-only TryRemove(key, out var lazy) overload — same race shape Core.Scripting-006 closed in GetOrCompile's catch block. A concurrent re-add between snapshot and TryRemove was evicted + disposed while the new caller still held it. Replaced with the value-scoped TryRemove(KeyValuePair<,>) overload. Regression test Clear_uses_value_scoped_TryRemove_so_a_race_inserted_entry_survives added. Core.Scripting-013 (Medium, Security): Hand-rolled BuildWrapperSource pastes user source between literal braces; brace-balanced source could inject sibling methods/classes alongside CompiledScript.Run. Analyzer still walked the injected members so it wasn't a direct escape, but it relaxed the documented 'method body' authoring contract. Added EnforceSingleRunMember: after ParseText, the compilation unit must hold exactly one type (CompiledScript) and that type must hold exactly one member (the Run method). Any deviation throws CompilationErrorException with LMX001/ LMX002 diagnostic IDs and a Core.Scripting-013 reference in the message. Two regression tests added covering the sibling-method and sibling-class injection vectors. Core.Scripting-015 (Low, Correctness, latent): ToCSharpTypeName's generic branch truncated at the first backtick via IndexOf, silently dropping closed args of nested-generic shapes (Outer<T>.Inner<U>). No production caller exercises this shape today (all TContext/TResult are top-level non-nested), so the bug was latent. Rewrote the generic branch to walk the FullName segment-by- segment, consuming generic args per segment so nested shapes emit valid C# (global::Ns.Outer<T>.Inner<U> rather than the broken Outer<T,U>). Core.ScriptedAlarms-013 (Low, Documentation): The internal test accessors TryGetScratchReadCacheForTest / TryGetScratchContextForTest return live mutable scratch refilled in place under _evalGate. XML docs didn't warn future test authors about the synchronization contract. Added a <remarks> block to each documenting the only-safe-on-quiesced-engine + identity-or-single-key contract. Verification (suites green): Core.Scripting.Tests: 110/110 (was 107 — +3 new rejection/race tests) Core.ScriptedAlarms.Tests: 67/67 (unchanged — doc-only fix) Core.VirtualTags.Tests: 57/57 (unchanged) After this commit, all 12 findings from the updated re-review are closed (10 Resolved, 1 Won't Fix none, 1 Deferred — Driver.Galaxy-017). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> |
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Joseph Doherty
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41e62b2663 |
docs(code-reviews): updated re-review at commit a9be809 — 12 new findings
Re-reviewed the four modules with source changes since the previous review commit |
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Joseph Doherty
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0001cdd579 |
fix(scripted-alarms): reuse per-alarm evaluation scratch on the hot path
Core.ScriptedAlarms-009 resolution: replace the per-call Dictionary +
AlarmPredicateContext allocation with a per-alarm reusable AlarmScratch
held in _scratchByAlarmId, refilled in place under _evalGate on each
evaluation. The hot path no longer allocates per upstream tag change.
Why this matters:
On a busy line where many tags feeding many alarms change frequently,
the old BuildReadCache allocated a fresh dictionary + context on every
predicate evaluation — a steady stream of short-lived allocations the
GC eventually has to reclaim. With the reuse, the dictionary and
context are allocated once per alarm (on first evaluation) and refilled
in place across every subsequent re-eval.
Implementation:
- New private AlarmScratch class holds the reusable
Dictionary<string, DataValueSnapshot> read cache (pre-sized to the
alarm's Inputs.Count) and the AlarmPredicateContext that wraps it by
reference. The context observes refilled values without being
re-created.
- ConcurrentDictionary<string, AlarmScratch> _scratchByAlarmId on the
engine, cleared in LoadAsync alongside _alarms so a config-publish
drops the prior generation's scratch (Inputs / Logger may change).
- EvaluatePredicateToStateAsync looks up scratch via GetOrAdd, calls
the new RefillReadCache(Dictionary, IReadOnlySet) helper to clear +
repopulate the dictionary in place, then runs the predicate against
the reused context.
- BuildReadCache removed.
Safety:
Reuse is serialised under _evalGate which guarantees no two threads
ever observe the same scratch in a half-refilled state. The
AlarmPredicateContext is bound to the scratch dictionary by reference,
so the predicate's ctx.GetTag(path) sees the freshly-refilled values
rather than a stale snapshot.
Verification:
- All 66 ScriptedAlarms tests pass (was 63 — three new regression tests
locking the reuse contract).
- All 56 VirtualTags tests still pass (unchanged).
- All 104 Core.Scripting tests still pass (unchanged).
New tests in ScriptedAlarmEngineTests:
- Reevaluation_reuses_the_same_read_cache_dictionary — asserts
ReferenceEquals(scratch_before, scratch_after) across two
evaluations of the same alarm.
- Reevaluation_reuses_the_same_predicate_context — same, for the
context.
- LoadAsync_drops_the_prior_generations_scratch — asserts a config
publish wipes the prior scratch (so a stale Logger / Inputs can't
leak into the new generation).
Internal test hooks TryGetScratchReadCacheForTest /
TryGetScratchContextForTest added via the existing
InternalsVisibleTo for the tests project. Kept internal — not part of
the public engine surface.
Docs:
- docs/v2/Galaxy.Performance.md "Scripted-alarm engine" section
rewritten as "hot-path allocation reuse" documenting the new
contract + reuse safety reasoning + the three regression tests.
- code-reviews/Core.ScriptedAlarms/findings.md -009 flipped
Won't Fix → Resolved.
- code-reviews/README.md regenerated.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Joseph Doherty
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99354bfaf2 |
fix(core-scripted-alarms): resolve Low code-review findings (Core.ScriptedAlarms-003,006,008,010,011; -009 documented)
- Core.ScriptedAlarms-003: emit OnEvent OUTSIDE _evalGate by collecting
pending emissions during the gate-held section and flushing them after
release; eliminates re-entrancy deadlock the docs already promised.
- Core.ScriptedAlarms-006: track every fire-and-forget Reevaluate /
ShelvingCheck task in _inFlight; Dispose drains the set so the engine
no longer races store writes against teardown.
- Core.ScriptedAlarms-008: store comments as ImmutableList<AlarmComment>
so AppendComment is O(log n) instead of O(n).
- Core.ScriptedAlarms-010: document the deliberate input-quality
asymmetry (Uncertain drives the predicate, renders {?} in the message)
in docs/ScriptedAlarms.md and on MessageTemplate.Resolve remarks.
- Core.ScriptedAlarms-011: propagate the no-op reason through
TransitionResult.NoOp(state, reason) and log it from
ScriptedAlarmEngine.ApplyAsync.
- Core.ScriptedAlarms-009 (Won't Fix per recommendation): documented the
per-evaluation dictionary allocation in docs/v2/Galaxy.Performance.md
with a mitigation path if a future soak surfaces pressure.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Joseph Doherty
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4dcfaace62 |
fix(scripted-alarms): update findings.md for resolved Medium findings
Mark Core.ScriptedAlarms-002, -004, -005, -007, -012 as Resolved with one-line descriptions. Update open-findings count from 11 to 6. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> |
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Joseph Doherty
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e3f8fa535a |
fix(scripted-alarms): resolve High code-review finding (Core.ScriptedAlarms-001)
_alarms was a plain Dictionary<string, AlarmState> mutated under the _evalGate semaphore, but four read paths (GetState, GetAllStates, the LoadedAlarmIds property, and RunShelvingCheck) touched it from arbitrary threads with no synchronisation. A Dictionary read concurrent with a writer's entry reassignment can throw InvalidOperationException or return torn state. Switched _alarms to ConcurrentDictionary<string, AlarmState>. The only write shapes are indexer-set and Clear, both atomic on ConcurrentDictionary, so all mutations stay correct without further change; reads now get safe snapshot semantics. LoadedAlarmIds materialises the key snapshot to keep its IReadOnlyCollection<string> return type. This matches _valueCache, which is already a ConcurrentDictionary. Added a regression test (Concurrent_reads_during_mutation_do_not_throw) that hammers the engine with state mutations while four reader threads continuously call the three unguarded read paths. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> |
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Joseph Doherty
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8568f5cd85 |
docs(code-reviews): comprehensive per-module review pass at 76d35d1
Reviewed all 31 src/ production projects against the 10-category checklist in REVIEW-PROCESS.md. Each module gets its own findings.md; code-reviews/README.md is regenerated from them. 334 findings: 6 Critical, 46 High, 126 Medium, 156 Low. Critical findings: - Server-001: WriteNodeIdUnknown recurses unconditionally — a HistoryRead on an unresolvable node crashes the process (remote DoS). - Admin-001/002: app-wide auth bypass (RouteView not AuthorizeRouteView) plus unauthenticated mutating routes. - Core.Scripting-001: System.Environment reachable from operator scripts; Environment.Exit() terminates the server. - Core.AlarmHistorian-001: rowIds/events parallel-list desync on a corrupt payload misapplies outcomes — silent alarm-event data loss. - Driver.Galaxy-001: ReconnectSupervisor is built but never triggered, so a transient gateway drop permanently kills the event stream. All findings are Status=Open; resolution is tracked per REVIEW-PROCESS.md section 4. Review only — no source code changed. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> |