From 37a18f491e45b69b3a2ea71e9b09afa173448d8d Mon Sep 17 00:00:00 2001
From: Andrew Lock <andrew.lock@datadoghq.com>
Date: Fri, 31 May 2024 18:23:28 +0100
Subject: [PATCH] Record SSI injection values in configuration

---
 tracer/src/Datadog.Trace/Configuration/TracerSettings.cs     | 5 +++++
 .../src/Datadog.Trace/Telemetry/DTOs/ConfigTelemetryData.cs  | 3 +++
 .../test/Datadog.Trace.Tests/Telemetry/ConfigurationTests.cs | 4 +++-
 .../Datadog.Trace.Tests/Telemetry/config_norm_rules.json     | 4 +++-
 4 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/tracer/src/Datadog.Trace/Configuration/TracerSettings.cs b/tracer/src/Datadog.Trace/Configuration/TracerSettings.cs
index 702be8a4095c..5e34f182d301 100644
--- a/tracer/src/Datadog.Trace/Configuration/TracerSettings.cs
+++ b/tracer/src/Datadog.Trace/Configuration/TracerSettings.cs
@@ -22,6 +22,7 @@
 using Datadog.Trace.SourceGenerators;
 using Datadog.Trace.Telemetry;
 using Datadog.Trace.Telemetry.Metrics;
+using Datadog.Trace.Util;
 
 namespace Datadog.Trace.Configuration
 {
@@ -418,6 +419,10 @@ internal TracerSettings(IConfigurationSource? source, IConfigurationTelemetry te
             telemetry.Record(ConfigTelemetryData.FullTrustAppDomain, value: AppDomain.CurrentDomain.IsFullyTrusted, ConfigurationOrigins.Default);
             telemetry.Record(ConfigTelemetryData.ManagedTracerTfm, value: ConfigTelemetryData.ManagedTracerTfmValue, recordValue: true, ConfigurationOrigins.Default);
 
+            // these are SSI variables that would be useful for correlation purposes
+            telemetry.Record(ConfigTelemetryData.SsiInjectionEnabled, value: EnvironmentHelpers.GetEnvironmentVariable("DD_INJECTION_ENABLED"), recordValue: true, ConfigurationOrigins.EnvVars);
+            telemetry.Record(ConfigTelemetryData.SsiAllowUnsupportedRuntimesEnabled, value: EnvironmentHelpers.GetEnvironmentVariable("DD_INJECT_FORCE"), recordValue: true, ConfigurationOrigins.EnvVars);
+
             if (AzureAppServiceMetadata is not null)
             {
                 telemetry.Record(ConfigTelemetryData.AasConfigurationError, AzureAppServiceMetadata.IsUnsafeToTrace, ConfigurationOrigins.Default);
diff --git a/tracer/src/Datadog.Trace/Telemetry/DTOs/ConfigTelemetryData.cs b/tracer/src/Datadog.Trace/Telemetry/DTOs/ConfigTelemetryData.cs
index 3e0050813cc2..b83ce8c20ee6 100644
--- a/tracer/src/Datadog.Trace/Telemetry/DTOs/ConfigTelemetryData.cs
+++ b/tracer/src/Datadog.Trace/Telemetry/DTOs/ConfigTelemetryData.cs
@@ -21,6 +21,9 @@ internal static class ConfigTelemetryData
         public const string ProfilerLoaded = "profiler_loaded";
         public const string CodeHotspotsEnabled = "code_hotspots_enabled";
 
+        public const string SsiInjectionEnabled = "ssi_injection_enabled";
+        public const string SsiAllowUnsupportedRuntimesEnabled = "ssi_forced_injection_enabled";
+
         // We intentionally are using specific values here, not OR_GREATER_THAN
 #if NET6_0
         public const string ManagedTracerTfmValue = "net6.0";
diff --git a/tracer/test/Datadog.Trace.Tests/Telemetry/ConfigurationTests.cs b/tracer/test/Datadog.Trace.Tests/Telemetry/ConfigurationTests.cs
index bddf15a699cf..9f8d57e80e9e 100644
--- a/tracer/test/Datadog.Trace.Tests/Telemetry/ConfigurationTests.cs
+++ b/tracer/test/Datadog.Trace.Tests/Telemetry/ConfigurationTests.cs
@@ -49,7 +49,9 @@ public class ConfigurationTests
         "DD_DOTNET_TRACER_HOME",
         "DD_INSTRUMENTATION_INSTALL_ID",
         "DD_INSTRUMENTATION_INSTALL_TYPE",
-        "DD_INSTRUMENTATION_INSTALL_TIME"
+        "DD_INSTRUMENTATION_INSTALL_TIME",
+        "DD_INJECTION_ENABLED",
+        "DD_INJECT_FORCE",
     };
 
     [Fact]
diff --git a/tracer/test/Datadog.Trace.Tests/Telemetry/config_norm_rules.json b/tracer/test/Datadog.Trace.Tests/Telemetry/config_norm_rules.json
index 0b9288e0118c..28d8fdf35815 100644
--- a/tracer/test/Datadog.Trace.Tests/Telemetry/config_norm_rules.json
+++ b/tracer/test/Datadog.Trace.Tests/Telemetry/config_norm_rules.json
@@ -565,5 +565,7 @@
   "trace.sidecar_trace_sender": "trace_sidecar_trace_sender",
   "trace.sampling_rules_format": "trace_sampling_rules_format",
   "DD_TRACE_SAMPLING_RULES_FORMAT": "trace_sampling_rules_format",
-  "trace.agentless": "trace_agentless"
+  "trace.agentless": "trace_agentless",
+  "ssi_injection_enabled": "ssi_injection_enabled",
+  "ssi_forced_injection_enabled": "ssi_forced_injection_enabled"
 }
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