Merge branch 'master' into nacho/IastUnitTestsDebugCI

tracer/src/Datadog.Trace.Trimming/build/Datadog.Trace.Trimming.xml

@@ -589,6 +589,7 @@
       <type fullname="System.Func`6" />
       <type fullname="System.Func`7" />
       <type fullname="System.GC" />
+      <type fullname="System.GCMemoryInfo" />
       <type fullname="System.Globalization.CultureInfo" />
       <type fullname="System.Globalization.DateTimeStyles" />
       <type fullname="System.Globalization.NumberFormatInfo" />

tracer/src/Datadog.Trace/Configuration/ConfigurationKeys.Debugger.cs

@@ -106,6 +106,18 @@ internal static class Debugger
             /// <seealso cref="DebuggerSettings.RedactedIdentifiers"/>
             public const string RedactedIdentifiers = "DD_DYNAMIC_INSTRUMENTATION_REDACTED_IDENTIFIERS";
 
+            /// <summary>
+            /// Configuration key for set of identifiers that are excluded from redaction decisions.
+            /// </summary>
+            /// <seealso cref="DebuggerSettings.RedactedExcludedIdentifiers"/>
+            public const string RedactionExcludedIdentifiers = "DD_DYNAMIC_INSTRUMENTATION_REDACTION_EXCLUDED_IDENTIFIERS";
+
+            /// <summary>
+            /// Configuration key for set of identifiers that are excluded from redaction decisions.
+            /// </summary>
+            /// <seealso cref="DebuggerSettings.RedactedExcludedIdentifiers"/>
+            public const string RedactedExcludedIdentifiers = "DD_DYNAMIC_INSTRUMENTATION_REDACTED_EXCLUDED_IDENTIFIERS";
+
             /// <summary>
             /// Configuration key for set of types that are used in redaction decisions.
             /// </summary>

tracer/src/Datadog.Trace/Debugger/Caching/CacheItem.cs

@@ -0,0 +1,51 @@
+// <copyright file="CacheItem.cs" company="Datadog">
+// Unless explicitly stated otherwise all files in this repository are licensed under the Apache 2 License.
+// This product includes software developed at Datadog (https://www.datadoghq.com/). Copyright 2017 Datadog, Inc.
+// </copyright>
+
+#nullable enable
+
+using System;
+using System.Threading;
+
+namespace Datadog.Trace.Debugger.Caching;
+
+internal class CacheItem<TValue>
+{
+    private readonly DateTime _created;
+    private long _lastAccessed;
+    private long _accessCount;
+
+    public CacheItem(TValue? value, TimeSpan? slidingExpiration)
+    {
+        if (slidingExpiration.HasValue && slidingExpiration.Value <= TimeSpan.Zero)
+        {
+            throw new ArgumentException("Sliding expiration must be positive", nameof(slidingExpiration));
+        }
+
+        Value = value;
+        _created = DateTime.UtcNow;
+        LastAccessed = _created;
+        SlidingExpiration = slidingExpiration;
+    }
+
+    public DateTimeOffset Created => _created;
+
+    public TimeSpan? SlidingExpiration { get; set; }
+
+    public TValue? Value { get; set; }
+
+    internal DateTimeOffset LastAccessed
+    {
+        get => DateTime.FromBinary(Interlocked.Read(ref _lastAccessed));
+        set => Interlocked.Exchange(ref _lastAccessed, value.UtcDateTime.ToBinary());
+    }
+
+    internal long AccessCount => Interlocked.Read(ref _accessCount);
+
+    internal void UpdateAccess(DateTime now)
+    {
+        LastAccessed = now;
+        Interlocked.Increment(ref _accessCount);
+    }
+}