template <MWORD ImageNullTerms> HRESULT ObjectMemory::LoadPointers(ibinstream& imageFile, const ImageHeader* pHeader, size_t& cbRead)
{
ASSERT(pHeader->nGlobalPointers == NumPointers);
::ZeroMemory(m_pConstObjs, CONSTSPACESIZE);
size_t cbPerm = 0;
BYTE* pNextConst = reinterpret_cast<BYTE*>(m_pConstObjs);
int i;
for (i = 0; i < NumPermanent; i++)
{
VariantObject* pConstObj = reinterpret_cast<VariantObject*>(pNextConst);
OTE* ote = m_pOT + i;
MWORD bytesToRead;
MWORD allocSize;
if (ote->isNullTerminated())
{
MWORD byteSize = ote->getSize();
allocSize = byteSize + NULLTERMSIZE;
bytesToRead = byteSize + ImageNullTerms;
}
else
{
allocSize = bytesToRead = ote->getSize();
}
if (bytesToRead > 0)
{
// Now load the rest of the object (size includes itself)
if (!imageFile.read(&(pConstObj->m_fields), bytesToRead))
return ImageReadError(imageFile);
}
else
{
if (allocSize == 0) pConstObj = NULL;
}
cbPerm += bytesToRead;
pNextConst += _ROUND2(allocSize, 4);
markObject(ote);
Oop* oldLocation = reinterpret_cast<Oop*>(ote->m_location);
ote->m_location = pConstObj;
ote->beSticky();
// Repair the object
FixupObject(ote, oldLocation, pHeader);
}
#ifdef _DEBUG
TRACESTREAM << i<< L" permanent objects loaded totalling " << cbPerm<< L" bytes" << std::endl;
#endif
memcpy(const_cast<VMPointers*>(&Pointers), &_Pointers, sizeof(Pointers));
cbRead += cbPerm;
return S_OK;
}
// There are some fixups that we can only apply after all the objects are loaded, because
// they involve reference from one object to other objects which may not be available
// during the normal load process. These fixes are applied here
void ObjectMemory::PostLoadFix()
{
// Special case handling for Contexts because we store
// the sp's as integers in the image file, but at
// run-time they are expected to be direct pointers
const OTE* pEnd = m_pOT + m_nOTSize; // Loop invariant
for (OTE* ote = m_pOT; ote < pEnd; ote++)
{
if (!ote->isFree())
{
if (ote->isBytes())
{
#ifdef _DEBUG
{
// Its a byte object, and may be null terminated
const Behavior* behavior = ote->m_oteClass->m_location;
const BytesOTE* oteBytes = reinterpret_cast<const BytesOTE*>(ote);
const VariantByteObject* object = oteBytes->m_location;
ASSERT(behavior->m_instanceSpec.m_nullTerminated == ote->isNullTerminated());
}
#endif
}
else if (ote->m_oteClass == _Pointers.ClassProcess)
{
ASSERT(ote->heapSpace() == OTEFlags::VirtualSpace);
ProcessOTE* oteProcess = reinterpret_cast<ProcessOTE*>(ote);
Process* process = oteProcess->m_location;
process->PostLoadFix(oteProcess);
}
}
}
ProtectConstSpace(PAGE_READONLY);
#if defined(_DEBUG) && 0
{
// Dump out the pointers
TRACESTREAM << NumPointers<< L" VM Pointers..." << std::endl;
for (int i = 0; i < NumPointers; i++)
{
VariantObject* obj = static_cast<VariantObject*>(m_pConstObjs);
POTE pote = POTE(obj->m_fields[i]);
TRACESTREAM << i<< L": " << pote << std::endl;
}
}
#endif
}
template <MWORD ImageNullTerms> HRESULT ObjectMemory::LoadObjects(ibinstream & imageFile, const ImageHeader * pHeader, size_t & cbRead)
{
// Other free OTEs will be threaded in front of the first OTE off the end
// of the currently committed table space. We set the free list pointer
// to that OTE rather than NULL to distinguish attemps to access off the
// end of the current table, which then allows us to dynamically grow it
// on demand
OTE* pEnd = m_pOT + pHeader->nTableSize;
m_pFreePointerList = reinterpret_cast<OTE*>(pEnd);
#ifdef _DEBUG
unsigned numObjects = NumPermanent; // Allow for VM registry, etc!
m_nFreeOTEs = m_nOTSize - pHeader->nTableSize;
#endif
size_t nDataSize = 0;
for (OTE* ote = m_pOT + NumPermanent; ote < pEnd; ote++)
{
if (!ote->isFree())
{
MWORD byteSize = ote->getSize();
MWORD* oldLocation = reinterpret_cast<MWORD*>(ote->m_location);
Object* pBody;
// Allocate space for the object, and copy into that space
if (ote->heapSpace() == OTEFlags::VirtualSpace)
{
MWORD dwMaxAlloc;
if (!imageFile.read(&dwMaxAlloc, sizeof(MWORD)))
return ImageReadError(imageFile);
cbRead += sizeof(MWORD);
pBody = reinterpret_cast<Object*>(AllocateVirtualSpace(dwMaxAlloc, byteSize));
ote->m_location = pBody;
}
else
{
if (ote->isNullTerminated())
{
ASSERT(!ote->isPointers());
pBody = AllocObj(ote, byteSize + NULLTERMSIZE);
if (NULLTERMSIZE > ImageNullTerms)
{
// Ensure we have a full null-terminator
*reinterpret_cast<NULLTERMTYPE*>(static_cast<VariantByteObject*>(pBody)->m_fields+byteSize) = 0;
}
byteSize += ImageNullTerms;
}
else
{
pBody = AllocObj(ote, byteSize);
}
}
markObject(ote);
if (!imageFile.read(pBody, byteSize))
return ImageReadError(imageFile);
cbRead += byteSize;
FixupObject(ote, oldLocation, pHeader);
#ifdef _DEBUG
numObjects++;
#endif
}
else
{
// Thread onto the free list
ote->m_location = (reinterpret_cast<POBJECT>(m_pFreePointerList));
m_pFreePointerList = ote;
#ifdef _DEBUG
m_nFreeOTEs++;
#endif
}
}
// Note that we don't terminate the free list with a null, because
// it must point off into space in order to get a GPF when it
// needs to be expanded (at which point we commit more pages)
#ifdef _DEBUG
ASSERT(numObjects + m_nFreeOTEs == m_nOTSize);
ASSERT(m_nFreeOTEs = CountFreeOTEs());
TRACESTREAM << std::dec << numObjects<< L", " << m_nFreeOTEs<< L" free" << std::endl;
#endif
cbRead += nDataSize;
return S_OK;
}