From 0c57663ea36c29b356f582888f59f86b7f289b25 Mon Sep 17 00:00:00 2001
From: svc64 <svcx80@icloud.com>
Date: Fri, 6 Oct 2023 15:53:17 +0300
Subject: [PATCH] Add comments on debug stuff & fix warnings

---
 .../Instructions/NativeInterface.cs           |  3 ++-
 src/ARMeilleure/State/ExecutionContext.cs     |  7 +++---
 src/Ryujinx.Cpu/IExecutionContext.cs          | 25 +++++++++++++++++--
 3 files changed, 28 insertions(+), 7 deletions(-)

diff --git a/src/ARMeilleure/Instructions/NativeInterface.cs b/src/ARMeilleure/Instructions/NativeInterface.cs
index f69cc1e0a4..982d6915fd 100644
--- a/src/ARMeilleure/Instructions/NativeInterface.cs
+++ b/src/ARMeilleure/Instructions/NativeInterface.cs
@@ -176,7 +176,8 @@ namespace ARMeilleure.Instructions
             Statistics.PauseTimer();
 
             ExecutionContext context = GetContext();
-
+            
+            // If debugging, we'll handle interrupts outside
             if (Optimizations.EnableDebugging && context.Interrupted)
             {
                 return false;
diff --git a/src/ARMeilleure/State/ExecutionContext.cs b/src/ARMeilleure/State/ExecutionContext.cs
index a414dd3f48..2df13e286a 100644
--- a/src/ARMeilleure/State/ExecutionContext.cs
+++ b/src/ARMeilleure/State/ExecutionContext.cs
@@ -102,10 +102,8 @@ namespace ARMeilleure.State
         private readonly ExceptionCallback _undefinedCallback;
 
         internal int ShouldStep;
-        internal int DebugStopped;
-        
-        public ulong DebugPc; // This is only valid while debugging is enabled.
-        public Barrier StepBarrier = new Barrier(2);
+        public ulong DebugPc { get; set; }
+        public Barrier StepBarrier { get; }
 
         public ExecutionContext(
             IJitMemoryAllocator allocator,
@@ -123,6 +121,7 @@ namespace ARMeilleure.State
             _undefinedCallback = undefinedCallback;
 
             Running = true;
+            StepBarrier = new Barrier(2);
 
             _nativeContext.SetCounter(MinCountForCheck);
         }
diff --git a/src/Ryujinx.Cpu/IExecutionContext.cs b/src/Ryujinx.Cpu/IExecutionContext.cs
index 40438d6fc2..ec9ef6a422 100644
--- a/src/Ryujinx.Cpu/IExecutionContext.cs
+++ b/src/Ryujinx.Cpu/IExecutionContext.cs
@@ -115,10 +115,31 @@ namespace Ryujinx.Cpu
         /// </remarks>
         void StopRunning();
 
-        // TODO: comments
+        /// <summary>
+        /// Requests the thread to stop running temporarily and call <see cref="ExceptionCallbacks.InterruptCallback"/>.
+        /// </summary>
+        /// <remarks>
+        /// The thread might not pause immediately.
+        /// One must not assume that guest code is no longer being executed by the thread after calling this function.
+        /// After single stepping, the thread should signal and wait on <see cref="StepBarrier"/> twice to allow
+        /// changing the thread state after stepping.
+        /// </remarks>
         void RequestDebugStep();
 
-        ulong DebugPc { get; set; }
+        /// <summary>
+        /// Step barrier
+        /// </summary>
+        /// <remarks>
+        /// Should be signaled and waited on twice after single-stepping.
+        /// </remarks>
         Barrier StepBarrier { get; }
+
+        /// <summary>
+        /// Current Program Counter (for debugging).
+        /// </summary>
+        /// <remarks>
+        /// PC register for the debugger. Must not be accessed while the thread isn't stopped for debugging.
+        /// </remarks>
+        ulong DebugPc { get; set; }
     }
 }