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Attach .NET 4 managed debugger when using aspire #643

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Merged
twsouthwick merged 1 commit into from
Dec 3, 2025
Merged

Attach .NET 4 managed debugger when using aspire #643

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58 changes: 50 additions & 8 deletions src/Aspire.Hosting.IncrementalMigration/IIS/VisualStudioExtensions.EnvDte.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -21,18 +21,60 @@ internal static partial class VisualStudioExtensions
private static class EnvDTE
{
[ComImport]
[Guid("95AC1923-6EAA-427C-B43E-6274A8CA6C95")]
[DefaultMember("Name")]
[Guid("5C5A0070-F396-4E37-A82A-1B767E272DF9")]
public interface Process
public interface Process2
{
[DispId(1)]
void Attach();

object Stub_Detach();
object Stub_Break();
object Stub_Terminate();
object Stub_Name { get; }
[DispId(2)]
void Detach([In] bool WaitForBreakOrEnd = true);

[DispId(3)]
void Break([In] bool WaitForBreakMode = true);

[DispId(4)]
void Terminate([In] bool WaitForBreakOrEnd = true);

[DispId(0)]
string Name
{
[DispId(0)]
[return: MarshalAs(UnmanagedType.BStr)]
get;
}

[DispId(100)]
int ProcessID
{
[DispId(100)]
get;
}

[DispId(101)]
object stub_Programs { get; }

[DispId(200)]
DTE DTE
{
[DispId(200)]
[return: MarshalAs(UnmanagedType.Interface)]
get;
}

[DispId(201)]
object stub_Parent { get; }

[DispId(202)]
object stub_Collection { get; }

int ProcessID { get; }
//
// Parameters:
// Engines:
// Single System.String or an array of either System.String or EnvDTE80.Engine objects
[DispId(1001)]
void Attach2([In][MarshalAs(UnmanagedType.Struct)] object Engines);
}

[ComImport]
Expand Down Expand Up @@ -159,7 +201,7 @@ Processes LocalProcesses
public interface Processes : IEnumerable
{
[return: MarshalAs(UnmanagedType.Interface)]
Process Item([In][MarshalAs(UnmanagedType.Struct)] object index);
Process2 Item([In][MarshalAs(UnmanagedType.Struct)] object index);

[return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalType = "System.Runtime.InteropServices.CustomMarshalers.EnumeratorToEnumVariantMarshaler, CustomMarshalers, Version=2.0.0.0, Culture=neutral, publicKeyToken=b03f5f7f11d50a3a")]
new IEnumerator GetEnumerator();
Expand Down
9 changes: 6 additions & 3 deletions src/Aspire.Hosting.IncrementalMigration/IIS/VisualStudioExtensions.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -148,6 +148,9 @@ private static Task<bool> AttachIISExpressAsync(int iisExpressPid)
return tcs.Task;
}

private const string Net4 = "{FB0D4648-F776-4980-95F8-BB7F36EBC1EE}";
private static readonly string[] Engines = { Net4 };

private static bool TryAttachDebugger(int iisPid)
{
var currentPid = Environment.ProcessId;
Expand All @@ -158,16 +161,16 @@ private static bool TryAttachDebugger(int iisPid)
var debugger = dte.Debugger;

// Check if the Aspire application is being debugged by it
foreach (EnvDTE.Process debuggedProcess in debugger.DebuggedProcesses)
foreach (EnvDTE.Process2 debuggedProcess in debugger.DebuggedProcesses)
{
if (debuggedProcess.ProcessID == currentPid)
{
// Go through the local processes the debugger can see and find the IIS one to attach
foreach (EnvDTE.Process dteProcess in debugger.LocalProcesses)
foreach (EnvDTE.Process2 dteProcess in debugger.LocalProcesses)
{
if (dteProcess.ProcessID == iisPid)
{
dteProcess.Attach();
dteProcess.Attach2(Engines);
return true;
}
}
Expand Down