[WIP] [cDAC] Implement remaining IXCLRDataStackWalk APIs

docs/design/datacontracts/StackWalk.md

@@ -9,6 +9,8 @@ public interface IStackDataFrameHandle
 {
     // Describes what the current Context/FrameIter of this handle represents.
     StackWalkState State { get; }
+    bool IsActiveFrame { get; }
+    bool IsExceptionFrame { get; }
 }
 
 public enum StackWalkState

src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Abstractions/Contracts/IStackWalk.cs

@@ -9,6 +9,8 @@ namespace Microsoft.Diagnostics.DataContractReader.Contracts;
 public interface IStackDataFrameHandle
 {
     StackWalkState State { get; }
+    bool IsActiveFrame { get; }
+    bool IsExceptionFrame { get; }
 }
 
 public enum StackWalkState

src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Contracts/Contracts/StackWalk/StackWalk_1.cs

@@ -35,7 +35,8 @@ private record StackDataFrameHandle(
         TargetPointer FrameAddress,
         ThreadData ThreadData,
         bool IsResumableFrame = false,
-        bool IsActiveFrame = false) : IStackDataFrameHandle
+        bool IsActiveFrame = false,
+        bool IsExceptionFrame = false) : IStackDataFrameHandle
     { }
 
     private class StackWalkData(IPlatformAgnosticContext context, StackWalkState state, FrameIterator frameIter, ThreadData threadData)
@@ -113,7 +114,9 @@ public StackDataFrameHandle ToDataFrame()
         {
             bool isResumable = IsCurrentFrameResumable();
             bool isActiveFrame = IsFirst && State == StackWalkState.Frameless;
-            return new(Context.Clone(), State, FrameIter.CurrentFrameAddress, ThreadData, isResumable, isActiveFrame);
+            bool isExceptionFrame = State is StackWalkState.Frame or StackWalkState.SkippedFrame
+                && FrameIter.GetCurrentFrameType() is FrameType.FaultingExceptionFrame or FrameType.SoftwareExceptionFrame;
+            return new(Context.Clone(), State, FrameIter.CurrentFrameAddress, ThreadData, isResumable, isActiveFrame, isExceptionFrame);
         }
     }