Inject {SatoriGC, true} into config values. (VSadov#67)

* Inject {SatoriGC, true} into config values.

* DOTNET_gcForceCompact

Author: VSadov

src/coreclr/gc/satori/SatoriGC.cpp

@@ -733,6 +733,7 @@ int64_t SatoriGC::GetTotalPauseDuration()
 void SatoriGC::EnumerateConfigurationValues(void* context, ConfigurationValueFunc configurationValueFunc)
 {
     GCConfig::EnumerateConfigurationValues(context, configurationValueFunc);
+    configurationValueFunc(context, (void*)"SatoriGC", (void*)"SatoriGC", GCConfigurationType::Boolean, true);
 }
 
 bool SatoriGC::CheckEscapeSatoriRange(size_t dst, size_t src, size_t len)

src/coreclr/gc/satori/SatoriRecycler.cpp

@@ -3501,7 +3501,9 @@ void SatoriRecycler::Plan()
     //
     // As crude criteria, we will do relocations if at least 1/2
     // of condemned regions want to participate. And at least 2.
-    size_t desiredRelocating = m_condemnedRegionsCount / 2 + 2;
+    size_t desiredRelocating = SatoriUtil::IsForceCompact() ?
+        0 :
+        m_condemnedRegionsCount / 2 + 2;
 
     if (m_isRelocating == false ||
         relocatableEstimate <= desiredRelocating)

src/coreclr/gc/satori/SatoriUtil.h

@@ -203,6 +203,12 @@ class SatoriUtil
         return (GCConfig::GetConcurrentGC());
     }
 
+    // DOTNET_gcForceCompact
+    static bool IsForceCompact()
+    {
+        return (GCConfig::GetForceCompact());
+    }
+
     // DOTNET_gcRelocatingGen1
     static bool IsRelocatingInGen1()
     {