Add DebuggerDisableUserUnhandledExceptionsAttribute

src/coreclr/nativeaot/System.Private.CoreLib/src/System/Diagnostics/Debugger.cs

@@ -5,7 +5,7 @@
 
 namespace System.Diagnostics
 {
- public static class Debugger
+ public static partial class Debugger
  {
  [MethodImpl(MethodImplOptions.NoInlining)]
  [DebuggerHidden] // this helps VS appear to stop on the source line calling Debugger.Break() instead of inside it

src/libraries/System.Private.CoreLib/src/System.Private.CoreLib.Shared.projitems

@@ -290,7 +290,9 @@
  <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\Contracts\Contracts.cs" />
  <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\Debug.cs" />
  <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\DebuggableAttribute.cs" />
+ <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\Debugger.cs" />
  <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\DebuggerBrowsableAttribute.cs" />
+ <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\DebuggerDisableUserUnhandledExceptionsAttribute.cs" />
  <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\DebuggerDisplayAttribute.cs" />
  <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\DebuggerHiddenAttribute.cs" />
  <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\DebuggerNonUserCodeAttribute.cs" />
@@ -2799,4 +2801,4 @@
  <Compile Include="$(MSBuildThisFileDirectory)System\Numerics\IUnaryPlusOperators.cs" />
  <Compile Include="$(MSBuildThisFileDirectory)System\Numerics\IUnsignedNumber.cs" />
  </ItemGroup>
-</Project>
+</Project>

src/libraries/System.Private.CoreLib/src/System/Diagnostics/Debugger.cs

@@ -0,0 +1,21 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Runtime.CompilerServices;
+
+namespace System.Diagnostics
+{
+ public static partial class Debugger
+ {
+ /// <summary>
+ /// Signals a breakpoint to an attached debugger with the <paramref name="exception"/> details
+ /// if a .NET debugger is attached with break on user-unhandled exception enabled and a method
+ /// attributed with DebuggerDisableUserUnhandledExceptionsAttribute calls this method.
+ /// </summary>
+ /// <param name="exception">The user-unhandled exception.</param>
+ [MethodImpl(MethodImplOptions.NoInlining | MethodImplOptions.NoOptimization)]
+ public static void BreakForUserUnhandledException(Exception exception)
+ {
+ }
+ }
+}

src/libraries/System.Private.CoreLib/src/System/Diagnostics/DebuggerDisableUserUnhandledExceptionsAttribute.cs

@@ -0,0 +1,15 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+namespace System.Diagnostics
+{
+ /// <summary>
+ /// If a .NET Debugger is attached which supports the Debugger.BreakForUserUnhandledException(Exception) API,
+ /// this attribute will prevent the debugger from breaking on user-unhandled exceptions when the
+ /// exception is caught by a method with this attribute, unless BreakForUserUnhandledException is called.
+ /// </summary>
+ [AttributeUsage(AttributeTargets.Method)]
+ public sealed class DebuggerDisableUserUnhandledExceptionsAttribute : Attribute
+ {
+ }
+}

src/libraries/System.Runtime/ref/System.Runtime.cs

@@ -8666,6 +8666,7 @@ public static partial class Debugger
  public static readonly string? DefaultCategory;
  public static bool IsAttached { get { throw null; } }
  public static void Break() { }
+ public static void BreakForUserUnhandledException(System.Exception exception) { }
  public static bool IsLogging() { throw null; }
  public static bool Launch() { throw null; }
  public static void Log(int level, string? category, string? message) { }
@@ -8683,6 +8684,11 @@ public enum DebuggerBrowsableState
  Collapsed = 2,
  RootHidden = 3,
  }
+ [System.AttributeUsage(System.AttributeTargets.Method)]
+ public sealed class DebuggerDisableUserUnhandledExceptionsAttribute : System.Attribute
+ {
+ public DebuggerDisableUserUnhandledExceptionsAttribute() { }
+ }
  [System.AttributeUsageAttribute(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Delegate | System.AttributeTargets.Enum | System.AttributeTargets.Field | System.AttributeTargets.Property | System.AttributeTargets.Struct, AllowMultiple=true)]
  public sealed partial class DebuggerDisplayAttribute : System.Attribute
  {

src/mono/System.Private.CoreLib/src/System/Diagnostics/Debugger.cs

@@ -5,7 +5,7 @@
 
 namespace System.Diagnostics
 {
- public static class Debugger
+ public static partial class Debugger
  {
  public static readonly string? DefaultCategory;