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, 3 insertions, 8 deletions

diff --git a/src/debug/daccess/daccess.cpp b/src/debug/daccess/daccess.cpp
index 0d1dc56e03..08c44e2b8c 100644
--- a/src/debug/daccess/daccess.cpp
+++ b/src/debug/daccess/daccess.cpp
@@ -8472,7 +8472,6 @@ StackWalkAction DacStackReferenceWalker::Callback(CrawlFrame *pCF, VOID *pData)
 
     MethodDesc *pMD = pCF->GetFunction();
     gcctx->sc->pMD = pMD;
-    gcctx->sc->pCurrentDomain = pCF->GetAppDomain();
 
     PREGDISPLAY pRD = pCF->GetRegisterSet();
     dsc->sp = (TADDR)GetRegdisplaySP(pRD);;
diff --git a/src/debug/daccess/dacdbiimpl.cpp b/src/debug/daccess/dacdbiimpl.cpp
index 4d97298838..8d02590727 100644
--- a/src/debug/daccess/dacdbiimpl.cpp
+++ b/src/debug/daccess/dacdbiimpl.cpp
@@ -5716,8 +5716,7 @@ ULONG DacDbiInterfaceImpl::GetAppDomainIdFromVmObjectHandle(VMPTR_OBJECTHANDLE v
 {
     DD_ENTER_MAY_THROW;
 
-    OBJECTHANDLE handle = (OBJECTHANDLE) vmHandle.GetDacPtr();
-    return HndGetHandleADIndex(handle).m_dwIndex;
+    return DefaultADID;
 }
 
 // Get the target address from a VMPTR_OBJECTHANDLE, i.e., the handle address
@@ -7553,7 +7552,7 @@ void DacStackReferenceWalker::GCEnumCallbackDac(LPVOID hCallback, OBJECTREF *pOb
     DacGcReference *data = dsc->pWalker->GetNextObject<DacGcReference>(dsc);
     if (data != NULL)
     {
-        data->vmDomain.SetDacTargetPtr(dac_cast<PTR_AppDomain>(dsc->pCurrentDomain).GetAddr());
+        data->vmDomain.SetDacTargetPtr(AppDomain::GetCurrentDomain().GetAddr());
         if (obj)
             data->pObject = obj | 1;
         else if (loc.targetPtr)
@@ -7589,7 +7588,7 @@ void DacStackReferenceWalker::GCReportCallbackDac(PTR_PTR_Object ppObj, ScanCont
     DacGcReference *data = dsc->pWalker->GetNextObject<DacGcReference>(dsc);
     if (data != NULL)
     {
-        data->vmDomain.SetDacTargetPtr(dac_cast<PTR_AppDomain>(dsc->pCurrentDomain).GetAddr());
+        data->vmDomain.SetDacTargetPtr(AppDomain::GetCurrentDomain().GetAddr());
         data->objHnd.SetDacTargetPtr(obj);
         data->dwType = CorReferenceStack;
         data->i64ExtraData = 0;
diff --git a/src/debug/daccess/gcinterface.dac.h b/src/debug/daccess/gcinterface.dac.h
index c7765ef364..87207f41a3 100644
--- a/src/debug/daccess/gcinterface.dac.h
+++ b/src/debug/daccess/gcinterface.dac.h
@@ -44,9 +44,6 @@ GC_DAC_VISIBLE
 OBJECTREF HndFetchHandle(OBJECTHANDLE handle);
 
 GC_DAC_VISIBLE
-struct ADIndex HndGetHandleADIndex(OBJECTHANDLE handle);
-
-GC_DAC_VISIBLE
 uintptr_t HndGetHandleExtraInfo(OBJECTHANDLE handle);
 
 #endif // DACCESS_COMPILE