1 files changed, 84 insertions, 0 deletions
diff --git a/src/ARMeilleure/Diagnostics/Symbols.cs b/src/ARMeilleure/Diagnostics/Symbols.cs
new file mode 100644
index 00000000..6bde62f5
--- /dev/null
+++ b/src/ARMeilleure/Diagnostics/Symbols.cs
@@ -0,0 +1,84 @@
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Diagnostics;
+
+namespace ARMeilleure.Diagnostics
+{
+    static class Symbols
+    {
+        private readonly struct RangedSymbol
+        {
+            public readonly ulong Start;
+            public readonly ulong End;
+            public readonly ulong ElementSize;
+            public readonly string Name;
+
+            public RangedSymbol(ulong start, ulong end, ulong elemSize, string name)
+            {
+                Start = start;
+                End = end;
+                ElementSize = elemSize;
+                Name = name;
+            }
+        }
+
+        private static readonly ConcurrentDictionary<ulong, string> _symbols;
+        private static readonly List<RangedSymbol> _rangedSymbols;
+
+        static Symbols()
+        {
+            _symbols = new ConcurrentDictionary<ulong, string>();
+            _rangedSymbols = new List<RangedSymbol>();
+        }
+
+        public static string Get(ulong address)
+        {
+            string result;
+
+            if (_symbols.TryGetValue(address, out result))
+            {
+                return result;
+            }
+
+            lock (_rangedSymbols)
+            {
+                foreach (RangedSymbol symbol in _rangedSymbols)
+                {
+                    if (address >= symbol.Start && address <= symbol.End)
+                    {
+                        ulong diff = address - symbol.Start;
+                        ulong rem = diff % symbol.ElementSize;
+
+                        result = symbol.Name + "_" + diff / symbol.ElementSize;
+
+                        if (rem != 0)
+                        {
+                            result += "+" + rem;
+                        }
+
+                        _symbols.TryAdd(address, result);
+
+                        return result;
+                    }
+                }
+            }
+
+            return null;
+        }
+
+        [Conditional("M_DEBUG")]
+        public static void Add(ulong address, string name)
+        {
+            _symbols.TryAdd(address, name);
+        }
+
+        [Conditional("M_DEBUG")]
+        public static void Add(ulong address, ulong size, ulong elemSize, string name)
+        {
+            lock (_rangedSymbols)
+            {
+                _rangedSymbols.Add(new RangedSymbol(address, address + size, elemSize, name));
+            }
+        }
+    }
+}