Debugger not working ARM64 M1 Mac Azure Functions 4 .NET 6 Unknown Error: 0x80131c3c

Steps to reproduce

Start VSCode debugger with Azure Functions v4 core tools on .net6 with the following launch.json config:

"configurations": [
    {
      "name": "Attach to .NET Functions",
      "type": "coreclr",
      "request": "attach",
      "processId": "${command:azureFunctions.pickProcess}",
     }
  ]

Expected behavior

Debugger should work

Actual behavior

Failed to attach to process: Unknown Error: 0x80131c3c

Work around:

Modify launch.json and add "targetArchitecture": "x86_64"

    "configurations": [
    {
      "name": "Attach to .NET Functions",
      "type": "coreclr",
      "request": "attach",
      "processId": "${command:azureFunctions.pickProcess}",
      "targetArchitecture": "x86_64"
     }
  ]

dotnet --info output

.NET SDK (reflecting any global.json): Version: 6.0.100 Commit: 9e8b04bbff

Runtime Environment: OS Name: Mac OS X OS Version: 12.0 OS Platform: Darwin RID: osx-arm64 Base Path: /usr/local/share/dotnet/sdk/6.0.100/

Host (useful for support): Version: 6.0.0 Commit: 4822e3c3aa

.NET SDKs installed: 6.0.100 [/usr/local/share/dotnet/sdk]

.NET runtimes installed: Microsoft.AspNetCore.App 6.0.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.NETCore.App 6.0.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET runtimes or SDKs: https://aka.ms/dotnet-download

Azure functions info

Azure Functions Core Tools Core Tools Version: 4.0.3971 Commit hash: d0775d487c93ebd49e9c1166d5c3c01f3c76eaaf (64-bit) Function Runtime Version: 4.0.1.16815

Environment information

VSCode version: 1.62.2 C# Extension: 1.23.16

Mono Information

OmniSharp using built-in mono

Dotnet Information

.NET SDK (reflecting any global.json): Version: 6.0.100 Commit: 9e8b04bbff

Runtime Environment: OS Name: Mac OS X OS Version: 12.0 OS Platform: Darwin RID: osx-arm64 Base Path: /usr/local/share/dotnet/sdk/6.0.100/

Host (useful for support): Version: 6.0.0 Commit: 4822e3c3aa

.NET SDKs installed: 6.0.100 [/usr/local/share/dotnet/sdk]

.NET runtimes installed: Microsoft.AspNetCore.App 6.0.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.NETCore.App 6.0.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET runtimes or SDKs: https://aka.ms/dotnet-download

Visual Studio Code Extensions

Extension	Author	Version
angular-console	nrwl	17.12.3
Angular2	johnpapa	12.0.0
azure-account	ms-vscode	0.9.11
cmake	twxs	0.0.17
codespaces	GitHub	1.3.6
cpptools	ms-vscode	1.7.1
csharp	ms-dotnettools	1.23.16
debugger-for-chrome	msjsdiag	4.13.0
dotnet	formulahendry	0.0.4
EditorConfig	EditorConfig	0.16.4
gitlens	eamodio	11.6.1
java	redhat	1.0.0
jupyter	ms-toolsai	2021.10.1101450599
jupyter-keymap	ms-toolsai	1.0.0
jupyter-renderers	ms-toolsai	1.0.3
markdown-preview-enhanced	shd101wyy	0.6.1
matlab	Gimly81	2.2.1
ng-template	Angular	13.0.0
playfab-explorer	Playfab	0.1.15
prettier-vscode	esbenp	9.0.0
python	ms-python	2021.11.1422169775
rainbow-csv	mechatroner	1.10.1
remote-ssh	ms-vscode-remote	0.66.1
remote-ssh-edit	ms-vscode-remote	0.66.1
restore-terminals	EthanSK	1.1.6
swdc-vscode	softwaredotcom	2.6.14
tcl	bitwisecook	0.4.0
terraform	4ops	0.2.2
todo-tree	Gruntfuggly	0.0.214
unity-code-snippets	kleber-swf	1.3.0
unity-debug	Unity	3.0.2
unity-tools	Tobiah	1.2.12
vscode-apollo	apollographql	1.19.9
vscode-azurefunctions	ms-azuretools	1.6.0
vscode-azureresourcegroups	ms-azuretools	0.4.0
vscode-eslint	dbaeumer	2.2.2
vscode-graphql	GraphQL	0.3.18
vscode-icons	vscode-icons-team	11.7.0
vscode-java-debug	vscjava	0.36.0
vscode-java-dependency	vscjava	0.18.8
vscode-java-pack	vscjava	0.18.6
vscode-java-test	vscjava	0.32.0
vscode-jest-runner	firsttris	0.4.47
vscode-maven	vscjava	0.34.1
vscode-nuget-package-manager	jmrog	1.1.6
vscode-pylance	ms-python	2021.11.1
vscode-typescript-tslint-plugin	ms-vscode	1.3.3
vscodeintellicode	VisualStudioExptTeam	1.2.14
vsfire	toba	1.4.1

VS Code version: 1.62.2 commit 3a6960b964327f0e3882ce18fcebd07ed191b316 C# Extension version: v1.23.16

OmniSharp log

-> (C) {"command":"initialize","arguments":{"clientID":"vscode","clientName":"Visual Studio Code","adapterID":"coreclr","pathFormat":"path","linesStartAt1":true,"columnsStartAt1":true,"supportsVariableType":true,"supportsVariablePaging":true,"supportsRunInTerminalRequest":true,"locale":"en-gb","supportsProgressReporting":true,"supportsInvalidatedEvent":true,"supportsMemoryReferences":true},"type":"request","seq":1}
<- (R) {"seq":1,"type":"response","request_seq":1,"success":true,"command":"initialize","body":{"supportsConfigurationDoneRequest":true,"supportsFunctionBreakpoints":true,"supportsConditionalBreakpoints":true,"supportsHitConditionalBreakpoints":true,"supportsEvaluateForHovers":true,"exceptionBreakpointFilters":[{"filter":"all","label":"All Exceptions","description":"Break when an exception is thrown. For more information about exception settings, see: https://aka.ms/VSCode-CS-ExceptionSettings","default":false,"supportsCondition":true,"conditionDescription":"Comma-separated list of exception types to break on, or if the list starts with '!', a list of exception types to ignore. \nExample 1: System.NullReferenceException -- this will break on just null reference exceptions. \nExample 2: !System.Threading.Tasks.TaskCanceledException -- this will break on all exceptions except for task canceled.\n\nFor more information about exception settings, see: https://aka.ms/VSCode-CS-ExceptionSettings"},{"filter":"user-unhandled","label":"User-Unhandled Exceptions","description":"Break when an exception is caught in non-user code (system code) after having passed through user code. For more information about exception settings, see: https://aka.ms/VSCode-CS-ExceptionSettings","default":true,"supportsCondition":true,"conditionDescription":"Comma-separated list of exception types to break on, or if the list starts with '!', a list of exception types to ignore. \nExample 1: System.NullReferenceException -- this will break on just null reference exceptions. \nExample 2: !System.Threading.Tasks.TaskCanceledException -- this will break on all exceptions except for task canceled.\n\nFor more information about exception settings, see: https://aka.ms/VSCode-CS-ExceptionSettings"}],"supportsSetVariable":true,"supportsGotoTargetsRequest":true,"supportsModulesRequest":true,"supportedChecksumAlgorithms":["MD5","SHA1","SHA256"],"supportsExceptionOptions":true,"supportsValueFormattingOptions":true,"supportsExceptionInfoRequest":true,"supportTerminateDebuggee":true,"supportsSetExpression":true,"supportsReadMemoryRequest":true,"supportsCancelRequest":true,"supportsExceptionFilterOptions":true,"supportsExceptionConditions":true,"supportsLoadSymbolsRequest":true,"supportsModuleSymbolSearchLog":true,"supportsDebuggerProperties":true,"supportsSetSymbolOptions":true,"supportsHitBreakpointIds":true,"supportsVsIndividualBreakpointOperations":true,"supportsVsBreakpointLanguage":true,"supportsSetHitCount":true,"supportsVsCustomMessages":true,"supportsEvaluationOptions":true,"supportsExceptionStackTrace":true,"memoryReferencesAreAddresses":true,"supportsObjectFavorites":true,"supportsObjectId":true,"supportsVariableEnumerators":false}}
-> (C) {"command":"initialize","arguments":{"clientID":"vscode","clientName":"Visual Studio Code","adapterID":"coreclr","pathFormat":"path","linesStartAt1":true,"columnsStartAt1":true,"supportsVariableType":true,"supportsVariablePaging":true,"supportsRunInTerminalRequest":true,"locale":"en-gb","supportsProgressReporting":true,"supportsInvalidatedEvent":true,"supportsMemoryReferences":true},"type":"request","seq":1}
-> (C) {"command":"attach","arguments":{"name":"Attach to .NET Functions","type":"coreclr","request":"attach","processId":"32880","debugServer":4711,"__configurationTarget":5,"__sessionId":"99b268cc-d048-4ec5-b382-3b54f38cfe9f"},"type":"request","seq":2}
<- (E) {"seq":4,"type":"event","event":"output","body":{"category":"console","output":"-------------------------------------------------------------------\nYou may only use the Microsoft .NET Core Debugger (vsdbg) with\nVisual Studio Code, Visual Studio or Visual Studio for Mac software\nto help you develop and test your applications.\n-------------------------------------------------------------------\n","severity":"ok"}}
<- (R) {"seq":5,"type":"response","request_seq":2,"success":true,"command":"attach"}
<- (E) {"seq":6,"type":"event","event":"initialized","body":{}}
-> (C) {"command":"setFunctionBreakpoints","arguments":{"breakpoints":[]},"type":"request","seq":3}
<- (R) {"seq":7,"type":"response","request_seq":3,"success":true,"command":"setFunctionBreakpoints","body":{"breakpoints":[]}}
-> (C) {"command":"setExceptionBreakpoints","arguments":{"filters":[],"filterOptions":[{"filterId":"user-unhandled"}]},"type":"request","seq":4}
<- (R) {"seq":8,"type":"response","request_seq":4,"success":true,"command":"setExceptionBreakpoints","body":{"breakpoints":[{"verified":true}]}}
-> (C) {"command":"configurationDone","type":"request","seq":5}
<- (E) {"seq":9,"type":"event","event":"output","body":{"category":"telemetry","output":"VS/Diagnostics/Debugger/vsdbg/AttachFailed","data":{"VS.Diagnostics.Debugger.vsdbg.Distribution.Version":"21.1.0","VS.Diagnostics.Debugger.vsdbg.Distribution.Name":"Darwin","VS.Diagnostics.Debugger.vsdbg.Version":"17.0.10712.2 commit:70a83505117741ba30f92c713a4bb0d0395c3197","VS.Diagnostics.Debugger.vsdbg.OSFamily":"Darwin","VS.Diagnostics.Debugger.vsdbg.ErrorCode":-2146231236}}}
<- (E) {"seq":10,"type":"event","event":"output","body":{"category":"stderr","output":"Unable to start debugging. Failed to attach to process: Unknown Error: 0x80131c3c\n"}}
<- (R) {"seq":11,"type":"response","request_seq":5,"success":false,"command":"configurationDone","message":"Failed to attach to process: Unknown Error: 0x80131c3c"}
-> (C) {"command":"disconnect","arguments":{"restart":false},"type":"request","seq":6}
<- (E) {"seq":12,"type":"event","event":"output","body":{"category":"telemetry","output":"VS/Diagnostics/Debugger/vsdbg/DebugCompleted","data":{"VS.Diagnostics.Debugger.vsdbg.AdapterId":"coreclr","VS.Diagnostics.Debugger.vsdbg.Distribution.Version":"21.1.0","VS.Diagnostics.Debugger.vsdbg.Distribution.Name":"Darwin","VS.Diagnostics.Debugger.vsdbg.DebugCompleted.BreakCounter":0,"VS.Diagnostics.Debugger.vsdbg.Version":"17.0.10712.2 commit:70a83505117741ba30f92c713a4bb0d0395c3197","VS.Diagnostics.Debugger.vsdbg.OSFamily":"Darwin"}}}
<- (R) {"seq":13,"type":"response","request_seq":6,"success":true,"command":"disconnect"}

[gregg-miskelly]

@EthanSK Did it work for you after changing your launch.json to:

"configurations": [
    {
      "name": "Attach to .NET Functions",
      "type": "coreclr",
      "request": "attach",
      "processId": "${command:azureFunctions.pickProcess}",
      "targetArchitecture": "x86_64"
     }
  ]

[gregg-miskelly]

Thanks. I edited the original comment to add the work around, and I opened https://github.com/microsoft/vscode-azurefunctions/issues/3005 to track fixing the issue.