[Local GC] Forbid inclusion of gcscan.h from VM and DAC directories

src/debug/daccess/enummem.cpp

@@ -21,7 +21,6 @@
 #include "ipcmanagerinterface.h"
 #include "binder.h"
 #include "win32threadpool.h"
-#include "gcscan.h"
 
 #ifdef FEATURE_APPX
 #include "appxutil.h"
@@ -407,7 +406,7 @@ HRESULT ClrDataAccess::DumpManagedObject(CLRDataEnumMemoryFlags flags, OBJECTREF
  return status;
  }
 
- if (!GCScan::GetGcRuntimeStructuresValid ())
+ if (*g_gcDacGlobals->gc_structures_invalid_cnt != 0)
  {
  // GC is in progress, don't dump this object
  return S_OK;
@@ -465,7 +464,7 @@ HRESULT ClrDataAccess::DumpManagedExcepObject(CLRDataEnumMemoryFlags flags, OBJE
  return S_OK;
  }
 
- if (!GCScan::GetGcRuntimeStructuresValid ())
+ if (*g_gcDacGlobals->gc_structures_invalid_cnt != 0)
  {
  // GC is in progress, don't dump this object
  return S_OK;

src/debug/daccess/request.cpp

@@ -3827,6 +3827,7 @@ ClrDataAccess::EnumWksGlobalMemoryRegions(CLRDataEnumMemoryFlags flags)
 
  Dereference(g_gcDacGlobals->ephemeral_heap_segment).EnumMem();
  g_gcDacGlobals->alloc_allocated.EnumMem();
+ g_gcDacGlobals->gc_structures_invalid_cnt.EnumMem();
  Dereference(g_gcDacGlobals->finalize_queue).EnumMem();
 
  // Enumerate the entire generation table, which has variable size

src/debug/daccess/request_svr.cpp

@@ -210,6 +210,7 @@ ClrDataAccess::EnumSvrGlobalMemoryRegions(CLRDataEnumMemoryFlags flags)
  DacEnumMemoryRegion(g_gcDacGlobals->g_heaps.GetAddr(),
  sizeof(TADDR) * *g_gcDacGlobals->n_heaps);
 
+ g_gcDacGlobals->gc_structures_invalid_cnt.EnumMem();
  g_gcDacGlobals->g_heaps.EnumMem();
 
  for (int i=0; i < *g_gcDacGlobals->n_heaps; i++)

src/debug/ee/dactable.cpp

@@ -21,14 +21,6 @@
 #include "../../vm/gcenv.h"
 #include "../../vm/ecall.h"
 #include "../../vm/rcwwalker.h"
-#include "../../gc/gc.h"
-#include "../../gc/gcscan.h"
-
-#undef SERVER_GC
-namespace WKS {
-#include "../../gc/gcimpl.h"
-#include "../../gc/gcpriv.h"
-}
 
 #ifdef DEBUGGING_SUPPORTED
 

src/gc/gcee.cpp

@@ -681,6 +681,11 @@ void GCHeap::UnregisterFrozenSegment(segment_handle seg)
 #endif // FEATURE_BASICFREEZE
 }
 
+bool GCHeap::RuntimeStructuresValid()
+{
+ return GCScan::GetGcRuntimeStructuresValid();
+}
+
 
 #endif // !DACCESS_COMPILE
 

src/gc/gcimpl.h

@@ -91,6 +91,8 @@ class GCHeap : public IGCHeapInternal
 
  void SetGCInProgress(BOOL fInProgress);
 
+ bool RuntimeStructuresValid();
+
  CLREvent * GetWaitForGCEvent();
 
  HRESULT Initialize ();

src/gc/gcinterface.h

@@ -581,6 +581,9 @@ class IGCHeap {
  // Sets whether or not a GC is in progress.
  virtual void SetGCInProgress(BOOL fInProgress) = 0;
 
+ // Gets whether or not the GC runtime structures are in a valid state for heap traversal.
+ virtual bool RuntimeStructuresValid() = 0;
+
  /*
  ============================================================================
  Add/RemoveMemoryPressure support routines. These are on the interface

src/gc/gcscan.cpp

@@ -19,11 +19,7 @@
 #include "gc.h"
 #include "objecthandle.h"
 
-#ifdef DACCESS_COMPILE
-SVAL_IMPL_INIT(int32_t, GCScan, m_GcStructuresInvalidCnt, 1);
-#else //DACCESS_COMPILE
 VOLATILE(int32_t) GCScan::m_GcStructuresInvalidCnt = 1;
-#endif //DACCESS_COMPILE
 
 bool GCScan::GetGcRuntimeStructuresValid ()
 {
@@ -33,18 +29,7 @@ bool GCScan::GetGcRuntimeStructuresValid ()
  return (int32_t)m_GcStructuresInvalidCnt == 0;
 }
 
-#ifdef DACCESS_COMPILE
-
-#ifndef FEATURE_REDHAWK
-void
-GCScan::EnumMemoryRegions(CLRDataEnumMemoryFlags flags)
-{
- UNREFERENCED_PARAMETER(flags);
- m_GcStructuresInvalidCnt.EnumMem();
-}
-#endif
-
-#else
+#ifndef DACCESS_COMPILE
 
 //
 // Dependent handle promotion scan support

src/gc/gcscan.h

@@ -89,11 +89,7 @@ class GCScan
 
  static void VerifyHandleTable(int condemned, int max_gen, ScanContext* sc);
 
-#ifdef DACCESS_COMPILE 
- SVAL_DECL(int32_t, m_GcStructuresInvalidCnt);
-#else
  static VOLATILE(int32_t) m_GcStructuresInvalidCnt;
-#endif //DACCESS_COMPILE
 };
 
 // These two functions are utilized to scan the heap if requested by ETW

src/inc/dacvars.h

@@ -138,8 +138,6 @@ DEFINE_DACVAR(ULONG, PTR_SharedDomain, SharedDomain__m_pSharedDomain, SharedDoma
 
 DEFINE_DACVAR(ULONG, DWORD, CExecutionEngine__TlsIndex, CExecutionEngine::TlsIndex)
 
-DEFINE_DACVAR(ULONG, LONG, GCScan__m_GcStructuresInvalidCnt, GCScan::m_GcStructuresInvalidCnt)
-
 #if defined(FEATURE_WINDOWSPHONE)
 DEFINE_DACVAR(ULONG, int, CCLRErrorReportingManager__g_ECustomDumpFlavor, CCLRErrorReportingManager::g_ECustomDumpFlavor)
 #endif

src/vm/object.cpp

@@ -19,7 +19,6 @@
 #include "eeconfig.h"
 #include "gcheaputilities.h"
 #include "field.h"
-#include "gcscan.h"
 #include "argdestination.h"
 
 
@@ -1776,9 +1775,10 @@ VOID Object::ValidateInner(BOOL bDeep, BOOL bVerifyNextHeader, BOOL bVerifySyncB
  // try to validate next object's header
  if (bDeep 
  && bVerifyNextHeader 
- && GCScan::GetGcRuntimeStructuresValid ()
+ && GCHeapUtilities::IsGCHeapInitialized()
+ && GCHeapUtilities::GetGCHeap()->RuntimeStructuresValid()
  //NextObj could be very slow if concurrent GC is going on
- && !(GCHeapUtilities::IsGCHeapInitialized() && GCHeapUtilities::GetGCHeap ()->IsConcurrentGCInProgress ()))
+ && !GCHeapUtilities::GetGCHeap ()->IsConcurrentGCInProgress ())
  {
  Object * nextObj = GCHeapUtilities::GetGCHeap ()->NextObj (this);
  if ((nextObj != NULL) &&

src/vm/stubhelpers.cpp

@@ -21,7 +21,6 @@
 #include "comdatetime.h"
 #include "gcheaputilities.h"
 #include "interoputil.h"
-#include "gcscan.h"
 
 #ifdef FEATURE_COMINTEROP
 #include <oletls.h>
@@ -58,7 +57,7 @@ void StubHelpers::ValidateObjectInternal(Object *pObjUNSAFE, BOOL fValidateNextO
 }
  CONTRACTL_END;
 
- _ASSERTE(GCScan::GetGcRuntimeStructuresValid());
+ _ASSERTE(GCHeapUtilities::GetGCHeap()->RuntimeStructuresValid());
 
  // validate the object - there's no need to validate next object's
  // header since we validate the next object explicitly below

src/vm/syncblk.cpp

@@ -30,7 +30,6 @@
 #include "corhost.h"
 #include "comdelegate.h"
 #include "finalizerthread.h"
-#include "gcscan.h"
 
 #ifdef FEATURE_COMINTEROP
 #include "runtimecallablewrapper.h"
@@ -2518,7 +2517,7 @@ BOOL ObjHeader::Validate (BOOL bVerifySyncBlkIndex)
  //rest of the DWORD is SyncBlk Index
  if (!(bits & BIT_SBLK_IS_HASHCODE))
  {
- if (bVerifySyncBlkIndex && GCScan::GetGcRuntimeStructuresValid ())
+ if (bVerifySyncBlkIndex && GCHeapUtilities::GetGCHeap()->RuntimeStructuresValid ())
  {
  DWORD sbIndex = bits & MASK_SYNCBLOCKINDEX;
  ASSERT_AND_CHECK(SyncTableEntry::GetSyncTableEntry()[sbIndex].m_Object == obj);