From d24f9d1e1e5346b0ec088271b1408a3b8bb1c9df Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Thu, 22 May 2025 05:18:56 +0200
Subject: [PATCH] Add warning when using memory profiler without enabled on
 startup

---
 Source/Editor/Windows/Profiler/Memory.cs  | 15 +++++++++++++++
 Source/Engine/Profiler/ProfilerMemory.cpp |  4 ++++
 Source/Engine/Profiler/ProfilerMemory.h   |  2 +-
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/Source/Editor/Windows/Profiler/Memory.cs b/Source/Editor/Windows/Profiler/Memory.cs
index f33bec4cc..806bed18f 100644
--- a/Source/Editor/Windows/Profiler/Memory.cs
+++ b/Source/Editor/Windows/Profiler/Memory.cs
@@ -29,6 +29,7 @@ namespace FlaxEditor.Windows.Profiler
         private List<Row> _tableRowsCache;
         private string[] _groupNames;
         private int[] _groupOrder;
+        private Label _warningText;
         
         public Memory()
         : base("Memory")
@@ -65,6 +66,18 @@ namespace FlaxEditor.Windows.Profiler
             };
             _managedAllocationsChart.SelectedSampleChanged += OnSelectedSampleChanged;
 
+            // Warning text
+            if (!ProfilerMemory.Enabled)
+            {
+                _warningText = new Label
+                {
+                    Text = "Detailed memory profiling is disabled. Run with command line: -mem",
+                    TextColor = Color.Red,
+                    Visible = false,
+                    Parent = layout,
+                };
+            }
+
             // Table
             var style = Style.Current;
             var headerColor = style.LightBackground;
@@ -204,6 +217,8 @@ namespace FlaxEditor.Windows.Profiler
         {
             if (_frames.Count == 0)
                 return;
+            if (_warningText != null)
+                _warningText.Visible = true;
             var frame = _frames.Get(selectedFrame);
             var totalUage = frame.Usage.Values0[(int)ProfilerMemory.Groups.TotalTracked];
             var totalPeek = frame.Peek.Values0[(int)ProfilerMemory.Groups.TotalTracked];
diff --git a/Source/Engine/Profiler/ProfilerMemory.cpp b/Source/Engine/Profiler/ProfilerMemory.cpp
index e617d712c..adb244f26 100644
--- a/Source/Engine/Profiler/ProfilerMemory.cpp
+++ b/Source/Engine/Profiler/ProfilerMemory.cpp
@@ -186,6 +186,10 @@ namespace
             output.AppendLine();
         }
 #endif
+
+        // Warn that data might be missing due to inactive profiler
+        if (!ProfilerMemory::Enabled)
+            output.AppendLine(TEXT("Detailed memory profiling is disabled. Run with command line: -mem"));
     }
 
     FORCE_INLINE void AddGroupMemory(ProfilerMemory::Groups group, int64 add)
diff --git a/Source/Engine/Profiler/ProfilerMemory.h b/Source/Engine/Profiler/ProfilerMemory.h
index 65ed5d9ab..206814560 100644
--- a/Source/Engine/Profiler/ProfilerMemory.h
+++ b/Source/Engine/Profiler/ProfilerMemory.h
@@ -215,7 +215,7 @@ public:
     /// <summary>
     /// The profiling tools usage flag. Can be used to disable profiler. Run engine with '-mem' command line to activate it from start.
     /// </summary>
-    static bool Enabled;
+    API_FIELD(ReadOnly) static bool Enabled;
 
     static void OnMemoryAlloc(void* ptr, uint64 size);
     static void OnMemoryFree(void* ptr);