fix: Revert environment variable name change in installers and scripts (#2852)

Author: tippmar-nr

build/ArtifactBuilder/Artifacts/MsiInstaller.cs

@@ -17,7 +17,7 @@ class MsiInstaller : Artifact
         private readonly string[] _coreIISRegistryValues = new string[] {
                     "CORECLR_ENABLE_PROFILING=1",
                     "CORECLR_PROFILER={36032161-FFC0-4B61-B559-F6C5D41BAE5A}",
-                    "CORECLR_NEW_RELIC_HOME=[NETAGENTCOMMONFOLDER]" };
+                    "CORECLR_NEWRELIC_HOME=[NETAGENTCOMMONFOLDER]" };
 
         private readonly AgentComponents _frameworkAgentComponents;
         private readonly AgentComponents _coreAgentComponents;

build/Linux/build/common/run.sh

@@ -2,4 +2,4 @@
 
 # This script can be used to run a dotnet application with New Relic monitoring.
 
-CORECLR_NEW_RELIC_HOME=${CORECLR_NEW_RELIC_HOME:-/usr/local/newrelic-dotnet-agent} CORECLR_ENABLE_PROFILING=1 CORECLR_PROFILER={36032161-FFC0-4B61-B559-F6C5D41BAE5A} CORECLR_PROFILER_PATH=$CORECLR_NEW_RELIC_HOME/libNewRelicProfiler.so $@
+NRHOME=${CORECLR_NEWRELIC_HOME:-${CORECLR_NEW_RELIC_HOME:-/usr/local/newrelic-dotnet-agent}} CORECLR_ENABLE_PROFILING=1 CORECLR_PROFILER={36032161-FFC0-4B61-B559-F6C5D41BAE5A} CORECLR_PROFILER_PATH=$NRHOME/libNewRelicProfiler.so $@

build/Linux/build/common/setenv.sh

@@ -1,9 +1,11 @@
 #!/bin/bash
 
-if [ -z "$CORECLR_NEW_RELIC_HOME" ]; then
-    echo "CORECLR_NEW_RELIC_HOME is undefined"
+if [ -z "$CORECLR_NEWRELIC_HOME" ]; && [ -z "$CORECLR_NEW_RELIC_HOME" ]; then
+    echo "CORECLR_NEWRELIC_HOME is undefined"
 else
+    NRHOME=${CORECLR_NEWRELIC_HOME:-${CORECLR_NEW_RELIC_HOME}}
+    
     export CORECLR_ENABLE_PROFILING=1
     export CORECLR_PROFILER={36032161-FFC0-4B61-B559-F6C5D41BAE5A}
-    export CORECLR_PROFILER_PATH=$CORECLR_NEW_RELIC_HOME/libNewRelicProfiler.so
+    export CORECLR_PROFILER_PATH=$NRHOME/libNewRelicProfiler.so
 fi

build/Linux/build/deb/postinst

@@ -45,12 +45,12 @@ fi
 rm -f $NEWRELIC_HOME/extensions/NewRelic.Providers.Wrapper.Logging.Instrumentation.xml 2> /dev/null
 rm -f $NEWRELIC_HOME/extensions/NewRelic.Providers.Wrapper.Logging.dll 2> /dev/null
 
-echo "export CORECLR_NEW_RELIC_HOME=${NEWRELIC_HOME}" > /etc/profile.d/${PACKAGE_NAME}-path.sh
+echo "export CORECLR_NEWRELIC_HOME=${NEWRELIC_HOME}" > /etc/profile.d/${PACKAGE_NAME}-path.sh
 source /etc/profile.d/${PACKAGE_NAME}-path.sh
 
 chmod o+w $NEWRELIC_HOME/logs
 chmod +x $NEWRELIC_HOME/*.sh 2> /dev/null
 
 printf "Initialize the New Relic .NET Agent environment variables by running:\n"
 printf "\t\033[1msource /etc/profile.d/${PACKAGE_NAME}-path.sh\033[0m\n"
-printf "\t\033[1msource $CORECLR_NEW_RELIC_HOME/setenv.sh\033[0m\n"
+printf "\t\033[1msource $CORECLR_NEWRELIC_HOME/setenv.sh\033[0m\n"

build/Linux/build/rpm/newrelic-dotnet-agent.spec

@@ -88,12 +88,12 @@ fi
 rm -f $NEWRELIC_HOME/extensions/NewRelic.Providers.Wrapper.Logging.Instrumentation.xml 2> /dev/null
 rm -f $NEWRELIC_HOME/extensions/NewRelic.Providers.Wrapper.Logging.dll 2> /dev/null
 
-echo "export CORECLR_NEW_RELIC_HOME=${NEWRELIC_HOME}" > /etc/profile.d/%{name}-path.sh
+echo "export CORECLR_NEWRELIC_HOME=${NEWRELIC_HOME}" > /etc/profile.d/%{name}-path.sh
 source /etc/profile.d/%{name}-path.sh
 
 chmod o+w $NEWRELIC_HOME/logs
 chmod +x $NEWRELIC_HOME/*.sh 2> /dev/null
 
 printf "Initialize the New Relic .NET Agent environment variables by running:\n"
 printf "\t\033[1msource /etc/profile.d/%{name}-path.sh\033[0m\n"
-printf "\t\033[1msource $CORECLR_NEW_RELIC_HOME/setenv.sh\033[0m\n"
+printf "\t\033[1msource $CORECLR_NEWRELIC_HOME/setenv.sh\033[0m\n"

build/Packaging/AzureSiteExtension/Content/applicationHost.xdt

@@ -8,12 +8,12 @@
         <add name="COR_PROFILER_PATH" value="%HOME%\NewRelicAgent\Framework\NewRelic.Profiler.dll" xdt:Locator="Match(name)" xdt:Transform="InsertIfMissing"/>
         <add name="COR_PROFILER_PATH_32" value="%HOME%\NewRelicAgent\Framework\x86\NewRelic.Profiler.dll" xdt:Locator="Match(name)" xdt:Transform="InsertIfMissing"/>
         <add name="COR_PROFILER_PATH_64" value="%HOME%\NewRelicAgent\Framework\NewRelic.Profiler.dll" xdt:Locator="Match(name)" xdt:Transform="InsertIfMissing"/>
-        <add name="NEW_RELIC_HOME" value="%HOME%\NewRelicAgent\Framework" xdt:Locator="Match(name)" xdt:Transform="InsertIfMissing"/>
+        <add name="NEWRELIC_HOME" value="%HOME%\NewRelicAgent\Framework" xdt:Locator="Match(name)" xdt:Transform="InsertIfMissing"/>
         <add name="CORECLR_ENABLE_PROFILING" value="1" xdt:Locator="Match(name)" xdt:Transform="InsertIfMissing"/>
         <add name="CORECLR_PROFILER" value="{36032161-FFC0-4B61-B559-F6C5D41BAE5A}" xdt:Locator="Match(name)" xdt:Transform="InsertIfMissing"/>
         <add name="CORECLR_PROFILER_PATH_32" value="%HOME%\NewRelicAgent\Core\x86\NewRelic.Profiler.dll" xdt:Locator="Match(name)" xdt:Transform="InsertIfMissing"/>
         <add name="CORECLR_PROFILER_PATH_64" value="%HOME%\NewRelicAgent\Core\NewRelic.Profiler.dll" xdt:Locator="Match(name)" xdt:Transform="InsertIfMissing"/>
-        <add name="CORECLR_NEW_RELIC_HOME" value="%HOME%\NewRelicAgent\Core" xdt:Locator="Match(name)" xdt:Transform="InsertIfMissing"/>
+        <add name="CORECLR_NEWRELIC_HOME" value="%HOME%\NewRelicAgent\Core" xdt:Locator="Match(name)" xdt:Transform="InsertIfMissing"/>
         <add name="NEW_RELIC_METADATA_AZURE_APP_SERVICE_NAME" value="%WEBSITE_SITE_NAME%" xdt:Locator="Match(name)" xdt:Transform="InsertIfMissing"/>
       </environmentVariables>
     </runtime>

build/Packaging/AzureSiteExtension/Content/install.ps1

@@ -320,7 +320,7 @@ try
 
 	if ($env:NEWRELIC_LICENSEKEY -eq $null -and $env:NEW_RELIC_LICENSE_KEY -eq $null)
 	{
-		WriteToInstallLog "The environment variable NEW_RELIC_LICENSE_KEY must be set. Please make sure to add it."
+		WriteToInstallLog "The environment variable NEWRELIC_LICENSE_KEY must be set. Please make sure to add it."
 	}
 
 	RemoveNewRelicInstallArtifacts "."
@@ -337,7 +337,7 @@ try
 					"/configuration/system.webServer/runtime/environmentVariables/add[@name='CORECLR_PROFILER']",
 					"/configuration/system.webServer/runtime/environmentVariables/add[@name='CORECLR_PROFILER_PATH_32']",
 					"/configuration/system.webServer/runtime/environmentVariables/add[@name='CORECLR_PROFILER_PATH_64']",
-					"/configuration/system.webServer/runtime/environmentVariables/add[@name='CORECLR_NEW_RELIC_HOME']")
+					"/configuration/system.webServer/runtime/environmentVariables/add[@name='CORECLR_NEWRELIC_HOME']")
 		$file = resolve-path(".\applicationHost.xdt")
 		RemoveXmlElements $file $xPaths
 	}

build/Packaging/NugetAzureCloudServices/tools/NewRelicHelper.psm1

@@ -244,12 +244,12 @@ function update_azure_service_definition([System.__ComObject] $project){
 
             	#Helps Azure Workers find the newrelic.config
             	$variableNHNode = $xml.CreateElement('Variable','http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceDefinition')
-            	$variableNHNode.SetAttribute('name','NEW_RELIC_HOME')
+            	$variableNHNode.SetAttribute('name','NEWRELIC_HOME')
                 $variableNHNode.SetAttribute('value','D:\ProgramData\New Relic\.NET Agent\')
 
                 #Helps Azure Workers find the NewRelic.Agent.Core.dll
             	$variableNIPNode = $xml.CreateElement('Variable','http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceDefinition')
-            	$variableNIPNode.SetAttribute('name','NEW_RELIC_INSTALL_PATH')
+            	$variableNIPNode.SetAttribute('name','NEWRELIC_INSTALL_PATH')
                 $variableNIPNode.SetAttribute('value','D:\Program Files\New Relic\.NET Agent\')
 
             	$runtimeEnvironmentNode.AppendChild($variableCEPNode)
@@ -390,7 +390,7 @@ function cleanup_azure_service_definition([System.__ComObject] $project){
 
 		$runtimeNode = $modified.Runtime
         if($runtimeNode -ne $null -and $runtimeNode.ChildNodes.Count -gt 0){
-        	$variableNodes = $runtimeNode.Environment.Variable | where { $_.name -eq "COR_ENABLE_PROFILING" -or $_.name -eq "COR_PROFILER" -or $_.name -eq "NEW_RELIC_HOME" -or $_.name -eq "NEW_RELIC_INSTALL_PATH" }
+			$variableNodes = $runtimeNode.Environment.Variable | where { $_.name -eq "COR_ENABLE_PROFILING" -or $_.name -eq "COR_PROFILER" -or $_.name -eq "NEW_RELIC_HOME" -or $_.name -eq "NEW_RELIC_INSTALL_PATH" -or $_.name -eq "NEWRELIC_HOME" -or $_.name -eq "NEWRELIC_INSTALL_PATH" }
         	if($variableNodes -ne $null -and $variableNodes.Count -gt 0){
         		foreach($varNode in $variableNodes){
         			[Void]$varNode.ParentNode.RemoveChild($varNode)

build/Packaging/NugetAzureWebSites-x64/tools/install.ps1

@@ -27,5 +27,5 @@ Write-Host "---------------------------------------"
 Write-Host "COR_ENABLE_PROFILING	1"
 Write-Host "COR_PROFILER			{71DA0A04-7777-4EC6-9643-7D28B46A8A41}"
 Write-Host "COR_PROFILER_PATH		D:\Home\site\wwwroot\newrelic\NewRelic.Profiler.dll"
-Write-Host "NEW_RELIC_HOME			D:\Home\site\wwwroot\newrelic"
-Write-Host "NEW_RELIC_LICENSE_KEY	[REPLACE WITH YOUR LICENSE KEY]"
+Write-Host "NEWRELIC_HOME			D:\Home\site\wwwroot\newrelic"
+Write-Host "NEWRELIC_LICENSE_KEY	[REPLACE WITH YOUR LICENSE KEY]"

build/Packaging/NugetAzureWebSites-x86/tools/install.ps1

@@ -27,5 +27,5 @@ Write-Host "---------------------------------------"
 Write-Host "COR_ENABLE_PROFILING	1"
 Write-Host "COR_PROFILER			{71DA0A04-7777-4EC6-9643-7D28B46A8A41}"
 Write-Host "COR_PROFILER_PATH		D:\Home\site\wwwroot\newrelic\NewRelic.Profiler.dll"
-Write-Host "NEW_RELIC_HOME			D:\Home\site\wwwroot\newrelic"
-Write-Host "NEW_RELIC_LICENSE_KEY	[REPLACE WITH YOUR LICENSE KEY]"
+Write-Host "NEWRELIC_HOME			D:\Home\site\wwwroot\newrelic"
+Write-Host "NEWRELIC_LICENSE_KEY	[REPLACE WITH YOUR LICENSE KEY]"

docs/development.md

@@ -33,17 +33,17 @@ You need to configure the following environment variables for the agent to attac
 
 #### Environment variables for .NET Framework
 ```bash
-NEW_RELIC_LICENSE_KEY=<your New Relic license key>
-NEW_RELIC_HOME=path\to\home\directory
+NEWRELIC_LICENSE_KEY=<your New Relic license key>
+NEWRELIC_HOME=path\to\home\directory
 COR_ENABLE_PROFILING=1
 COR_PROFILER={71DA0A04-7777-4EC6-9643-7D28B46A8A41}
 COR_PROFILER_PATH=path\to\home\directory\NewRelic.Profiler.dll
 ```
 
 #### Environment variables for .NET Core
 ```bash
-NEW_RELIC_LICENSE_KEY=<your New Relic license key>
-CORECLR_NEW_RELIC_HOME=path\to\home\directory
+NEWRELIC_LICENSE_KEY=<your New Relic license key>
+CORECLR_NEWRELIC_HOME=path\to\home\directory
 CORECLR_ENABLE_PROFILING=1
 CORECLR_PROFILER={36032161-FFC0-4B61-B559-F6C5D41BAE5A}
 CORECLR_PROFILER_PATH=path\to\home\directory\NewRelic.Profiler.dll

src/Agent/Miscellaneous/azure-app-services.md

@@ -29,7 +29,7 @@ An example of this configuration inside a `.csproj` file looks something like:
 CORECLR_ENABLE_PROFILING=1
 CORECLR_PROFILER={36032161-FFC0-4B61-B559-F6C5D41BAE5A}
 CORECLR_PROFILER_PATH=D:\Home\site\wwwroot\newrelic\NewRelic.Profiler.dll
-CORECLR_NEW_RELIC_HOME=D:\Home\site\wwwroot\newrelic
+CORECLR_NEWRELIC_HOME=D:\Home\site\wwwroot\newrelic
 ```
 Note: environment variables for Azure App Services are set in the `Application settings` configuration page for your app, under `App settings`.  You can verify the environment variables for your app by browsing to the `Environment` tab of your app's Kudu diagnostic console and then jumping to the `Environment Variables` section, e.g. `https://myappname.scm.azurewebsites.net/Env.cshtml#envVariables`
 

src/Agent/MsiInstaller/Installer/Product.wxs

@@ -761,8 +761,7 @@ SPDX-License-Identifier: Apache-2.0
     <!-- Global environment variables -->
     <ComponentGroup Id="EnvironmentVariableComponents" Directory="TARGETDIR">
       <Component Guid="{A54E9E06-E477-4D0F-8063-9BEDD6BC0B7B}">
-        <Environment Id="OldNewRelicInstallPathEnvironment" System="yes" Name="NEWRELIC_INSTALL_PATH" Action="remove" />
-        <Environment Id="NewRelicInstallPathEnvironment" System="yes" Name="NEW_RELIC_INSTALL_PATH" Value="[NETAGENTFOLDER]" Action="set" />
+        <Environment Id="NewRelicInstallPathEnvironment" System="yes" Name="NEWRELIC_INSTALL_PATH" Value="[NETAGENTFOLDER]" Action="set" />
         <RegistryValue Root="HKLM" Key="Software\New Relic\.NET Agent" Name="NewRelicInstallPathEnvironmentInstalled" Type="integer" Value="1" KeyPath="yes" />
       </Component>
     </ComponentGroup>
@@ -798,7 +797,7 @@ SPDX-License-Identifier: Apache-2.0
       </Component>
       <Component Guid="{B63A32D5-33CC-4334-844C-B3B9E265B191}">
         <Environment Id="OldCoreClrNewRelicHomeEnvironment" System="yes" Name="CORECLR_NEWRELIC_HOME" Action="remove" />
-        <Environment Id="CoreClrNewRelicHomeEnvironment" System="yes" Name="CORECLR_NEW_RELIC_HOME" Value="[NETAGENTCOMMONFOLDER]" Action="set" />
+        <Environment Id="CoreClrNewRelicHomeEnvironment" System="yes" Name="CORECLR_NEWRELIC_HOME" Value="[NETAGENTCOMMONFOLDER]" Action="set" />
         <RegistryValue Root="HKLM" Key="Software\New Relic\.NET Core Agent" Name="CoreClrNewRelicHomeEnvironmentInstalled" Type="integer" Value="1" KeyPath="yes" />
       </Component>
     </ComponentGroup>
@@ -809,7 +808,7 @@ SPDX-License-Identifier: Apache-2.0
         <RegistryValue Root="HKLM" Key="System\CurrentControlSet\Services\W3SVC" Name="Environment" Type="multiString" Action="append" KeyPath="yes">
           <MultiStringValue Value="COR_ENABLE_PROFILING=1" />
           <MultiStringValue Value="COR_PROFILER={71DA0A04-7777-4EC6-9643-7D28B46A8A41}" />
-          <MultiStringValue Value="NEW_RELIC_INSTALL_PATH=[NETAGENTFOLDER]" />
+          <MultiStringValue Value="NEWRELIC_INSTALL_PATH=[NETAGENTFOLDER]" />
           <?ifdef IsWin64?>
             <MultiStringValue Value="COR_PROFILER_PATH_32=[NETAGENT32ON64FOLDER]NewRelic.Profiler.dll" />
           <?endif?>
@@ -819,7 +818,7 @@ SPDX-License-Identifier: Apache-2.0
         <RegistryValue Root="HKLM" Key="System\CurrentControlSet\Services\WAS" Name="Environment" Type="multiString" Action="append" KeyPath="yes">
           <MultiStringValue Value="COR_ENABLE_PROFILING=1" />
           <MultiStringValue Value="COR_PROFILER={71DA0A04-7777-4EC6-9643-7D28B46A8A41}" />
-          <MultiStringValue Value="NEW_RELIC_INSTALL_PATH=[NETAGENTFOLDER]" />
+          <MultiStringValue Value="NEWRELIC_INSTALL_PATH=[NETAGENTFOLDER]" />
           <?ifdef IsWin64?>
             <MultiStringValue Value="COR_PROFILER_PATH_32=[NETAGENT32ON64FOLDER]NewRelic.Profiler.dll" />
           <?endif?>
@@ -832,8 +831,8 @@ SPDX-License-Identifier: Apache-2.0
         <RegistryValue Root="HKLM" Key="System\CurrentControlSet\Services\W3SVC" Name="Environment" Type="multiString" Action="append" KeyPath="yes">
           <MultiStringValue Value="CORECLR_ENABLE_PROFILING=1" />
           <MultiStringValue Value="CORECLR_PROFILER={36032161-FFC0-4B61-B559-F6C5D41BAE5A}" />
-          <MultiStringValue Value="CORECLR_NEW_RELIC_HOME=[NETAGENTCOMMONFOLDER]" />
-          <MultiStringValue Value="NEW_RELIC_INSTALL_PATH=[NETAGENTFOLDER]" />
+          <MultiStringValue Value="CORECLR_NEWRELIC_HOME=[NETAGENTCOMMONFOLDER]" />
+          <MultiStringValue Value="NEWRELIC_INSTALL_PATH=[NETAGENTFOLDER]" />
           <?ifdef IsWin64?>
             <MultiStringValue Value="CORECLR_PROFILER_PATH_32=[NETAGENT32ON64FOLDER]NewRelic.Profiler.dll" />
           <?endif?>
@@ -843,8 +842,8 @@ SPDX-License-Identifier: Apache-2.0
         <RegistryValue Root="HKLM" Key="System\CurrentControlSet\Services\WAS" Name="Environment" Type="multiString" Action="append" KeyPath="yes">
           <MultiStringValue Value="CORECLR_ENABLE_PROFILING=1" />
           <MultiStringValue Value="CORECLR_PROFILER={36032161-FFC0-4B61-B559-F6C5D41BAE5A}" />
-          <MultiStringValue Value="CORECLR_NEW_RELIC_HOME=[NETAGENTCOMMONFOLDER]" />
-          <MultiStringValue Value="NEW_RELIC_INSTALL_PATH=[NETAGENTFOLDER]" />
+          <MultiStringValue Value="CORECLR_NEWRELIC_HOME=[NETAGENTCOMMONFOLDER]" />
+          <MultiStringValue Value="NEWRELIC_INSTALL_PATH=[NETAGENTFOLDER]" />
           <?ifdef IsWin64?>
             <MultiStringValue Value="CORECLR_PROFILER_PATH_32=[NETAGENT32ON64FOLDER]NewRelic.Profiler.dll" />
           <?endif?>

src/Agent/MsiInstaller/InstallerActions/CustomActions.cs

@@ -444,7 +444,9 @@ public ActionResult ValidateFilesAndFolders()
             DeleteFile(@"C:\Program Files\New Relic\.NET Agent\netframework\Extensions\NewRelic.Providers.Wrapper.Asp35.dll");
 
 
-            String newrelicHomePath = Environment.GetEnvironmentVariable("NEW_RELIC_HOME");
+            String newrelicHomePath = Environment.GetEnvironmentVariable("NEWRELIC_HOME");
+            if (newrelicHomePath != null) DeleteFile(newrelicHomePath + @"\newrelic.xml");
+            newrelicHomePath = Environment.GetEnvironmentVariable("NEW_RELIC_HOME");
             if (newrelicHomePath != null) DeleteFile(newrelicHomePath + @"\newrelic.xml");
 
             return ActionResult.Success;

src/Agent/NewRelic/Agent/Extensions/Providers/Wrapper/README.md

@@ -204,7 +204,7 @@ You should use `AgentWrapperApi.HandleWrapperException` to deal with exceptions
 
 ## Notes on dynamic wrapper assembly loading ##
 
-Wrapper assemblies are loaded dynamically at agent startup. All assemblies found in **[NEW_RELIC_HOME]/Extensions** will be loaded, and all `IWrapper`s found in the assembly will be instantiated and passed to the `WrapperService` (contained inside a `LazyMap`).
+Wrapper assemblies are loaded dynamically at agent startup. All assemblies found in **[NEWRELIC_HOME]/Extensions** will be loaded, and all `IWrapper`s found in the assembly will be instantiated and passed to the `WrapperService` (contained inside a `LazyMap`).
 
 When an instrumented method is hit, `WrapperService` will ask the `LazyMap` for an appropriate `IWrapper`. The map will return the first wrapper it finds that returns **true** from `IWrapper.CanWrap`, or null if they all return **false**. The resulting wrapper (or null) will be cached in the map which is keyed on the fully qualified method signature. If the wrapper loader returns null, the agent will fall back to using tracers.
 

src/Agent/NewRelic/Profiler/README.md

@@ -97,7 +97,7 @@ When instrumentation in the `extensions` directory changes on disk, the profiler
 
 The Microsoft defined environment variables like `COR_ENABLE_PROFILING` and `COR_PROFILER_PATH` used to attach the profiler to a process.  On CoreCLR all of those environment variables are prefixed with `CORECLR` instead of `COR`, ie `CORECLR_ENABLE_PROFILING`.
 
-After the profiler attaches it uses custom environment variables to determine the path to `NewRelic.Agent.Core.dll`.  It tries to find the dll in the path specified by `NEW_RELIC_INSTALL_PATH`, or if that is undefined then `NEW_RELIC_HOME`.  On CoreCLR, those environment variables are prefixed with `CORECLR_` so that the agent does not try to use the .NET Framework managed agent in a CoreCLR process.
+After the profiler attaches it uses custom environment variables to determine the path to `NewRelic.Agent.Core.dll`.  It tries to find the dll in the path specified by `NEWRELIC_INSTALL_PATH`, or if that is undefined then `NEWRELIC_HOME`.  On CoreCLR, those environment variables are prefixed with `CORECLR_` so that the agent does not try to use the .NET Framework managed agent in a CoreCLR process.
 
 ## FAQ