Joseph Doherty
349e217ea3
Re-ran analysis/frida/mx-nmx-trace.js (with the F46 hooks for
LmxProxy.dll!CLMXProxyServer.Suspend / .Activate) against
MxTraceHarness on the local AVEVA install. Two captures landed:
- captures/123-frida-suspend-advised-instrumented/
Scenario: --scenario=suspend-advised --tag=TestChildObject.ScanState
After mx.suspend.begin/end at 17:23:51.949Z, NMX PutRequest fires
~140ms later with body:
2d 01 00 command 0x2D, version 0x0001
cd 2a ee ec b2 76 06 4f b4 58 5c a0 2d f7 a8 93 16-byte correlation_id (matches the prior AdviseSupervisory)
01 00 05 00 01 00 02 00 01 00 69 00 0a 00 engine + handle + attribute / property ids
47 92 00 00 03 00 00 00 trailer
TransferData wraps it; HRESULT 0 returned; ProcessDataReceived
callback delivers a 50-byte op-status frame; LMX surfaces it
through CUserConnectionCallback.OperationComplete. Suspend is
unambiguously server-side wire op 0x2D.
- captures/124-frida-activate-advised-instrumented/
Scenario: --scenario=activate-advised --tag=TestChildObject.ScanState
Activate fires at 17:26:02.982Z and returns Success synchronously
with no NMX traffic. The next NMX activity is 7+ seconds later
(harness teardown). Activate against a non-suspended item is
client-side only on this build.
The harness's activate-advised scenario doesn't sequence
Suspend-then-Activate, so we don't have direct evidence for
Activate-after-Suspend. Circumstantial reasoning: since Suspend
goes server-side with a state change, Activate likely also does to
revert. If direct evidence becomes needed, add a new
suspend-then-activate scenario to MxTraceHarness/Program.cs and
re-run.
design/70-risks-and-open-questions.md R5 moves to "settled —
Suspend is wire op 0x2D, Activate behaviour is conditional",
severity downgraded P2 -> P3 (no public Session::suspend /
Session::activate API exists today; if added later, 0x2D is the
encoder target).
design/followups.md F50 marked resolved.
docs/F50-suspend-activate-evidence.md: per-capture byte-level
evidence + repro recipe.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
18 lines
2.3 KiB
Plaintext
18 lines
2.3 KiB
Plaintext
2026-05-06T17:25:56.9336608+00:00 harness.start {"Scenario":"activate-advised","ClientName":"MxFridaTrace-124","Tags":["TestChildObject.ScanState"],"ItemContext":"","WriteType":"string","WriteValue":"","WriteValues":[],"UserId":0,"CurrentUserId":0,"VerifierUserId":0,"UserGuid":"","AuthUser":"","AuthenticateBeforeWrite":false,"UseAuthenticatedUserAsVerifier":false,"UsePlainAdvise":false,"WriteTimestamp":"","WriteDelayMilliseconds":750,"WriteIntervalMilliseconds":500,"BufferedUpdateInterval":1000,"DurationSeconds":8,"ProcessBitness":"x86","Runtime":"4.0.30319.42000"}
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2026-05-06T17:26:02.0166476+00:00 mx.register.begin {"ClientName":"MxFridaTrace-124"}
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2026-05-06T17:26:02.2451960+00:00 mx.register.end {"SessionHandle":1}
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2026-05-06T17:26:02.2451960+00:00 mx.additem.begin {"Tag":"TestChildObject.ScanState"}
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2026-05-06T17:26:02.2506300+00:00 mx.additem.end {"Tag":"TestChildObject.ScanState","ItemHandle":1}
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2026-05-06T17:26:02.2506300+00:00 mx.advise-supervisory.begin {"Tag":"TestChildObject.ScanState","ItemHandle":1}
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2026-05-06T17:26:02.2533435+00:00 mx.advise-supervisory.end {"Tag":"TestChildObject.ScanState","ItemHandle":1}
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2026-05-06T17:26:02.4738071+00:00 mx.event.data-change {"SessionHandle":1,"ItemHandle":1,"Value":{"Type":"System.Boolean","Value":"True"},"Quality":192,"Timestamp":{"Type":"System.String","Value":"5/6/2026 1:26:02.460 PM"},"Status":[{"Success":-1,"Category":"MxCategoryOk","Source":"MxSourceRequestingLmx","Detail":0}]}
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2026-05-06T17:26:02.9814081+00:00 mx.activate.begin {"Tag":"TestChildObject.ScanState","ItemHandle":1}
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2026-05-06T17:26:02.9832463+00:00 mx.activate.end {"Tag":"TestChildObject.ScanState","ItemHandle":1,"Status":{"Success":-1,"Category":"MxCategoryOk","Source":"MxSourceRequestingLmx","Detail":0}}
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2026-05-06T17:26:10.2003645+00:00 mx.unadvise.begin {"Tag":"TestChildObject.ScanState","ItemHandle":1}
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2026-05-06T17:26:10.2012649+00:00 mx.unadvise.end {"Tag":"TestChildObject.ScanState","ItemHandle":1}
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2026-05-06T17:26:10.2012649+00:00 mx.removeitem.begin {"Tag":"TestChildObject.ScanState","ItemHandle":1}
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2026-05-06T17:26:10.2012649+00:00 mx.removeitem.end {"Tag":"TestChildObject.ScanState","ItemHandle":1}
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2026-05-06T17:26:10.2012649+00:00 mx.unregister.begin {"SessionHandle":1}
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2026-05-06T17:26:12.7977621+00:00 mx.unregister.end {"SessionHandle":1}
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2026-05-06T17:26:12.8031645+00:00 harness.stop {}
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