mlaunch not retrieving all device information listed by xcrun devicectl

[matouskozak]

We have issues with "newly" updated iPhone lab devices to iOS 17.6 paired with XCode 15.4 (and iOS 18.1 with XCode 16.1) that are not working properly with XHarness (mlaunch). When reporting their status via xcrun devicectl list devices we see the device as "available (paired)".

However, upon retrieving the device information using mlaunch (v. 1.0.272) in https://github.com/matouskozak/xharness/blob/947b4ce2a0f5f514a11d49dd92c1a644d0c17e75/src/Microsoft.DotNet.XHarness.iOS.Shared/Hardware/HardwareDeviceLoader.cs#L60-L67, we are missing the identifier and device is not enabled for debugging (see https://helixr1107v0xdeko0k025g8.blob.core.windows.net/xharness-master-6bc91809e7094b48b7/ios-device-System.Buffers.Tests.app/1/list-ios-device-20250203_082615.log?helixlogtype=result)

Is there some device configuration option we need to set for the lab devices to make this work or could this be an issue with mlaunch itself?

(We tried replugging and repairing the devies numerous times without any success)

---

cc: @vitek-karas

[dalexsoto]

This sounds like developer mode on device is not enabled https://developer.apple.com/documentation/xcode/enabling-developer-mode-on-a-device

[rolfbjarne]

Can you run this:

xcrun devicectl list devices -v --json-output devices.json

and then attach the resulting devices.json file?

[matouskozak]

Thank you @dalexsoto and @rolfbjarne.

This sounds like developer mode on device is not enabled https://developer.apple.com/documentation/xcode/enabling-developer-mode-on-a-device

I don't have direct access to the device but I checked Xcode -> Window -> Devices and Simulators and there is no warning about disabled developer mode. Additionally, the following log suggest that developer mode is enabled.

Can you run this:
xcrun devicectl list devices -v --json-output devices.json
and then attach the resulting devices.json file?

It is a bit difficult to get any files from the lab device manually, I'll try to figure it out. However, I think that similar output can be found from https://helixr1107v0xdeko0k025g8.blob.core.windows.net/xharness-master-6bc91809e7094b48b7/ios-device-System.Buffers.Tests.app/1/list-ios-device-20250203_082615.log?helixlogtype=result , not in json format thought. Let me know if you would need the json specifically.

[08:26:16.2080330] xcrun devicectl -j /tmp/helix/working/A8760923/t/tmpVjAM2t.tmp -v list devices
[08:26:20.0292430] 	Running devicectl with elevated privileges via sudo is unlikely to work properly. Please do not do this.
[08:26:23.1585510] 	Using verbose logging.
[08:26:23.1586150] 	Devices:
[08:26:23.1672640] 	  ▿ 1 element
[08:26:23.1673090] 	    ▿ CoreDeviceClientJSONSupport.DeviceResult
[08:26:23.1673240] 	      - identifier: 3D048AED-F823-4530-A0E8-D1D1C16F9948
[08:26:23.1673340] 	      - tags: 0 elements
[08:26:23.1674510] 	      ▿ hardwareProperties: CoreDeviceClientJSONSupport.DeviceResult.HardwareProperties
[08:26:23.1674750] 	        ▿ cpuType: Optional(CoreDeviceClientJSONSupport.DeviceResult.CPUInfo(type: 16777228, subType: 2, name: "arm64e"))
[08:26:23.1674860] 	          ▿ some: CoreDeviceClientJSONSupport.DeviceResult.CPUInfo
[08:26:23.1674970] 	            - type: 16777228
[08:26:23.1675060] 	            - subType: 2
[08:26:23.1675160] 	            - name: "arm64e"
[08:26:23.1675880] 	        ▿ deviceType: Optional("iPhone")
[08:26:23.1676060] 	          - some: "iPhone"
[08:26:23.1676170] 	        ▿ ecid: Optional(886086987628590)
[08:26:23.1676270] 	          - some: 886086987628590
[08:26:23.1676370] 	        ▿ hardwareModel: Optional("D79AP")
[08:26:23.1676480] 	          - some: "D79AP"
[08:26:23.1676750] 	        ▿ internalStorageCapacity: Optional(64000000000)
[08:26:23.1676880] 	          - some: 64000000000
[08:26:23.1676970] 	        ▿ isProductionFused: Optional(true)
[08:26:23.1677100] 	          - some: true
[08:26:23.1678200] 	        ▿ marketingName: Optional("iPhone SE")
[08:26:23.1678410] 	          - some: "iPhone SE"
[08:26:23.1678530] 	        ▿ platform: Optional("iOS")
[08:26:23.1678630] 	          - some: "iOS"
[08:26:23.1678730] 	        ▿ productType: Optional("iPhone12,8")
[08:26:23.1678830] 	          - some: "iPhone12,8"
[08:26:23.1678930] 	        ▿ reality: Optional(CoreDeviceClientJSONSupport.DeviceResult.DeviceReality.physical)
[08:26:23.1679050] 	          - some: CoreDeviceClientJSONSupport.DeviceResult.DeviceReality.physical
[08:26:23.1679150] 	        ▿ serialNumber: Optional("FFMGXY78PLJM")
[08:26:23.1679250] 	          - some: "FFMGXY78PLJM"
[08:26:23.1679680] 	        ▿ supportedCPUTypes: Optional([CoreDeviceClientJSONSupport.DeviceResult.CPUInfo(type: 16777228, subType: 2, name: "arm64e"), CoreDeviceClientJSONSupport.DeviceResult.CPUInfo(type: 16777228, subType: 0, name: "arm64"), CoreDeviceClientJSONSupport.DeviceResult.CPUInfo(type: 16777228, subType: 1, name: "arm64"), CoreDeviceClientJSONSupport.DeviceResult.CPUInfo(type: 33554444, subType: 1, name: "arm64_32")])
[08:26:23.1679830] 	          ▿ some: 4 elements
[08:26:23.1679930] 	            ▿ CoreDeviceClientJSONSupport.DeviceResult.CPUInfo
[08:26:23.1680030] 	              - type: 16777228
[08:26:23.1680120] 	              - subType: 2
[08:26:23.1680220] 	              - name: "arm64e"
[08:26:23.1680310] 	            ▿ CoreDeviceClientJSONSupport.DeviceResult.CPUInfo
[08:26:23.1680690] 	              - type: 16777228
[08:26:23.1680790] 	              - subType: 0
[08:26:23.1680910] 	              - name: "arm64"
[08:26:23.1680980] 	            ▿ CoreDeviceClientJSONSupport.DeviceResult.CPUInfo
[08:26:23.1681050] 	              - type: 16777228
[08:26:23.1681120] 	              - subType: 1
[08:26:23.1681180] 	              - name: "arm64"
[08:26:23.1681250] 	            ▿ CoreDeviceClientJSONSupport.DeviceResult.CPUInfo
[08:26:23.1681320] 	              - type: 33554444
[08:26:23.1681380] 	              - subType: 1
[08:26:23.1681450] 	              - name: "arm64_32"
[08:26:23.1681510] 	        ▿ supportedDeviceFamilies: Optional([1])
[08:26:23.1681580] 	          ▿ some: 1 element
[08:26:23.1681800] 	            - 1
[08:26:23.1681890] 	        ▿ thinningProductType: Optional("iPhone12,8")
[08:26:23.1682080] 	          - some: "iPhone12,8"
[08:26:23.1682150] 	        ▿ udid: Optional("00008030-000325E43423402E")
[08:26:23.1682230] 	          - some: "00008030-000325E43423402E"
[08:26:23.1682290] 	      ▿ deviceProperties: CoreDeviceClientJSONSupport.DeviceResult.DeviceProperties
[08:26:23.1682370] 	        - bootState: nil
[08:26:23.1682430] 	        - ddiServicesAvailable: false
[08:26:23.1682500] 	        ▿ developerModeStatus: Optional(CoreDeviceClientJSONSupport.DeviceResult.DeveloperModeStatus.enabled)
[08:26:23.1682570] 	          - some: CoreDeviceClientJSONSupport.DeviceResult.DeveloperModeStatus.enabled
[08:26:23.1682640] 	        ▿ hasInternalOSBuild: Optional(false)
[08:26:23.1682710] 	          - some: false
[08:26:23.1682770] 	        ▿ name: Optional("Dncengosx160")
[08:26:23.1682840] 	          - some: "Dncengosx160"
[08:26:23.1682910] 	        ▿ osBuildUpdate: Optional("22B91")
[08:26:23.1682980] 	          - some: "22B91"
[08:26:23.1683040] 	        ▿ osVersionNumber: Optional("18.1.1")
[08:26:23.1683110] 	          - some: "18.1.1"
[08:26:23.1683180] 	        - provider: nil
[08:26:23.1683250] 	        - providerSpecificValues: nil
[08:26:23.1683400] 	        ▿ rootFileSystemIsWritable: Optional(false)
[08:26:23.1683470] 	          - some: false
[08:26:23.1683660] 	        - screenViewingURL: nil
[08:26:23.1683750] 	        ▿ bootedFromSnapshot: Optional(true)
[08:26:23.1683820] 	          - some: true
[08:26:23.1683890] 	        ▿ bootedSnapshotName: Optional("com.apple.os.update-4CD9F0831C05CA2895052E0364B14852F9B8CBA00CFD799C3DC2D9CE5F488FE8")
[08:26:23.1683960] 	          - some: "com.apple.os.update-4CD9F0831C05CA2895052E0364B14852F9B8CBA00CFD799C3DC2D9CE5F488FE8"
[08:26:23.1684030] 	        - releaseType: nil
[08:26:23.1684160] 	      ▿ connectionProperties: CoreDeviceClientJSONSupport.DeviceResult.ConnectionProperties
[08:26:23.1684240] 	        ▿ authenticationType: Optional(CoreDeviceClientJSONSupport.DeviceResult.AuthenticationType.manualPairing)
[08:26:23.1684310] 	          - some: CoreDeviceClientJSONSupport.DeviceResult.AuthenticationType.manualPairing
[08:26:23.1684380] 	        - isMobileDeviceOnly: false
[08:26:23.1684440] 	        ▿ lastConnectionDate: Optional(2024-12-19 07:50:29 +0000)
[08:26:23.1684510] 	          ▿ some: 2024-12-19 07:50:29 +0000
[08:26:23.1684580] 	            - timeIntervalSinceReferenceDate: 756287429.5689731
[08:26:23.1684640] 	        - localHostnames: nil
[08:26:23.1684830] 	        ▿ potentialHostnames: Optional(["00008030-000325E43423402E.coredevice.local", "3D048AED-F823-4530-A0E8-D1D1C16F9948.coredevice.local"])
[08:26:23.1684920] 	          ▿ some: 2 elements
[08:26:23.1685150] 	            - "00008030-000325E43423402E.coredevice.local"
[08:26:23.1685230] 	            - "3D048AED-F823-4530-A0E8-D1D1C16F9948.coredevice.local"
[08:26:23.1685300] 	        ▿ pairingState: Optional(CoreDeviceClientJSONSupport.DeviceResult.PairingState.paired)
[08:26:23.1685370] 	          - some: CoreDeviceClientJSONSupport.DeviceResult.PairingState.paired
[08:26:23.1685440] 	        ▿ transportType: Optional(CoreDeviceClientJSONSupport.DeviceResult.TransportType.wired)
[08:26:23.1685630] 	          - some: CoreDeviceClientJSONSupport.DeviceResult.TransportType.wired
[08:26:23.1685730] 	        ▿ tunnelTransportProtocol: Optional(CoreDeviceClientJSONSupport.DeviceResult.TunnelTransportProtocol.tcp)
[08:26:23.1685800] 	          - some: CoreDeviceClientJSONSupport.DeviceResult.TunnelTransportProtocol.tcp
[08:26:23.1685870] 	        - tunnelIPAddress: nil
[08:26:23.1685940] 	        - tunnelState: CoreDeviceClientJSONSupport.DeviceResult.TunnelState.disconnected
[08:26:23.1686000] 	      ▿ capabilities: 3 elements
[08:26:23.1686070] 	        ▿ Acquire Usage Assertion (com.apple.coredevice.feature.acquireusageassertion)
[08:26:23.1686290] 	          - name: "Acquire Usage Assertion"
[08:26:23.1686390] 	          - featureIdentifier: "com.apple.coredevice.feature.acquireusageassertion"
[08:26:23.1686460] 	        ▿ Connect to Device (com.apple.coredevice.feature.connectdevice)
[08:26:23.1686520] 	          - name: "Connect to Device"
[08:26:23.1686590] 	          - featureIdentifier: "com.apple.coredevice.feature.connectdevice"
[08:26:23.1686650] 	        ▿ Unpair Device (com.apple.coredevice.feature.unpairdevice)
[08:26:23.1686720] 	          - name: "Unpair Device"
[08:26:23.1686790] 	          - featureIdentifier: "com.apple.coredevice.feature.unpairdevice"
[08:26:23.1686850] 	      ▿ visibilityClass: Optional(CoreDeviceClientJSONSupport.DeviceResult.DeviceVisibilityClass.default)
[08:26:23.1686920] 	        - some: CoreDeviceClientJSONSupport.DeviceResult.DeviceVisibilityClass.default
[08:26:23.1706290] 	Saving JSON output file to /tmp/helix/working/A8760923/t/tmpVjAM2t.tmp

[rolfbjarne]

It looks like we don't write a value for IsUsableForDebugging to the output xml when listing devices found using devicectl.

Fix in progress: https://dev.azure.com/devdiv/DevDiv/_git/macios-mlaunch/pullrequest/610825