Remove concept of AppDomains from the GC (#24536)

* Remove concept of AppDomains from the GC
- Leave constructs allowing for multiple handle tables, as scenarios for that have been proposed
- Remove FEATURE_APPDOMAIN_RESOURCE_MONITORING

3 files changed, 2 insertions, 26 deletions

diff --git a/src/gc/env/etmdummy.h b/src/gc/env/etmdummy.h
index 2b47a46e4e..f2c76d4b8d 100644
--- a/src/gc/env/etmdummy.h
+++ b/src/gc/env/etmdummy.h
@@ -47,7 +47,7 @@
 #define FireEtwGCMarkHandles(HeapNum, ClrInstanceID) 0
 #define FireEtwGCMarkOlderGenerationRoots(HeapNum, ClrInstanceID) 0
 #define FireEtwFinalizeObject(TypeID, ObjectID, ClrInstanceID) 0
-#define FireEtwSetGCHandle(HandleID, ObjectID, Kind, Generation, AppDomainID, ClrInstanceID) 0
+#define FireEtwSetGCHandle(HandleID, ObjectID, Kind, Generation, ClrInstanceID) 0
 #define FireEtwDestroyGCHandle(HandleID, ClrInstanceID) 0
 #define FireEtwGCSampledObjectAllocationLow(Address, TypeID, ObjectCountForTypeSample, TotalSizeForTypeSample, ClrInstanceID) 0
 #define FireEtwPinObjectAtGCTime(HandleID, ObjectID, ObjectSize, TypeName, ClrInstanceID) 0
@@ -376,7 +376,7 @@
 #define FireEtwFailFast(FailFastUserMessage, FailedEIP, OSExitCode, ClrExitCode, ClrInstanceID) 0
 #define FireEtwPrvFinalizeObject(TypeID, ObjectID, ClrInstanceID, TypeName) 0
 #define FireEtwCCWRefCountChange(HandleID, ObjectID, COMInterfacePointer, NewRefCount, AppDomainID, ClassName, NameSpace, Operation, ClrInstanceID) 0
-#define FireEtwPrvSetGCHandle(HandleID, ObjectID, Kind, Generation, AppDomainID, ClrInstanceID) 0
+#define FireEtwPrvSetGCHandle(HandleID, ObjectID, Kind, Generation, ClrInstanceID) 0
 #define FireEtwPrvDestroyGCHandle(HandleID, ClrInstanceID) 0
 #define FireEtwFusionMessageEvent(ClrInstanceID, Prepend, Message) 0
 #define FireEtwFusionErrorCodeEvent(ClrInstanceID, Category, ErrorCode) 0
diff --git a/src/gc/env/gcenv.base.h b/src/gc/env/gcenv.base.h
index 614b84ab23..46ad366e62 100644
--- a/src/gc/env/gcenv.base.h
+++ b/src/gc/env/gcenv.base.h
@@ -538,22 +538,4 @@ inline bool FitsInU1(uint64_t val)
     return val == (uint64_t)(uint8_t)val;
 }
 
-// -----------------------------------------------------------------------------------------------------------
-//
-// AppDomain emulation. The we don't have these in Redhawk so instead we emulate the bare minimum of the API
-// touched by the GC/HandleTable and pretend we have precisely one (default) appdomain.
-//
-
-#define RH_DEFAULT_DOMAIN_ID 1
-
-struct ADIndex
-{
-    DWORD m_dwIndex;
-
-    ADIndex () : m_dwIndex(RH_DEFAULT_DOMAIN_ID) {}
-    explicit ADIndex (DWORD id) : m_dwIndex(id) {}
-    BOOL operator==(const ADIndex& ad) const { return m_dwIndex == ad.m_dwIndex; }
-    BOOL operator!=(const ADIndex& ad) const { return m_dwIndex != ad.m_dwIndex; }
-};
-
 #endif // __GCENV_BASE_INCLUDED__
diff --git a/src/gc/env/gcenv.ee.h b/src/gc/env/gcenv.ee.h
index b9918ec5b7..819f64882a 100644
--- a/src/gc/env/gcenv.ee.h
+++ b/src/gc/env/gcenv.ee.h
@@ -71,7 +71,6 @@ public:
     static void EnableFinalization(bool foundFinalizers);
 
     static void HandleFatalError(unsigned int exitCode);
-    static bool ShouldFinalizeObjectForUnload(void* pDomain, Object* obj);
     static bool EagerFinalized(Object* obj);
     static MethodTable* GetFreeObjectMethodTable();
     static bool GetBooleanConfigValue(const char* key, bool* value);
@@ -85,12 +84,7 @@ public:
     static void WalkAsyncPinned(Object* object, void* context, void(*callback)(Object*, Object*, void*));
     static IGCToCLREventSink* EventSink();
 
-    static uint32_t GetDefaultDomainIndex();
-    static void *GetAppDomainAtIndex(uint32_t appDomainIndex);
-    static bool AppDomainCanAccessHandleTable(uint32_t appDomainID);
-    static uint32_t GetIndexOfAppDomainBeingUnloaded();
     static uint32_t GetTotalNumSizedRefHandles();
-    static bool AppDomainIsRudeUnload(void *appDomain);
 
     static bool AnalyzeSurvivorsRequested(int condemnedGeneration);
     static void AnalyzeSurvivorsFinished(int condemnedGeneration);