bool Object::VerifyMemberFields(TADDR pMT, TADDR obj, WORD &numInstanceFields)
{
DacpMethodTableData vMethTable;
if (FAILED(vMethTable.Request(g_sos, pMT)))
return false;
// Recursively verify the parent (this updates numInstanceFields)
if (vMethTable.ParentMethodTable)
{
if (!VerifyMemberFields(TO_TADDR(vMethTable.ParentMethodTable), obj, numInstanceFields))
return false;
}
DacpMethodTableFieldData vMethodTableFields;
// Verify all fields on the object.
CLRDATA_ADDRESS dwAddr = vMethodTableFields.FirstField;
DacpFieldDescData vFieldDesc;
while (numInstanceFields < vMethodTableFields.wNumInstanceFields)
{
CheckInterrupt();
if (FAILED(vFieldDesc.Request(g_sos, dwAddr)))
return false;
if (vFieldDesc.Type >= ELEMENT_TYPE_MAX)
return false;
dwAddr = vFieldDesc.NextField;
if (!vFieldDesc.bIsStatic)
{
numInstanceFields++;
TADDR dwTmp = TO_TADDR(obj + vFieldDesc.dwOffset + sizeof(BaseObject));
if (vFieldDesc.Type == ELEMENT_TYPE_CLASS)
{
// Is it a valid object?
if (FAILED(MOVE(dwTmp, dwTmp)))
return false;
if (dwTmp != NULL)
{
DacpObjectData objData;
if (FAILED(objData.Request(g_sos, TO_CDADDR(dwTmp))))
return false;
}
}
}
}
return true;
}
TADDR Object::GetComponentMT() const
{
if (mMT != NULL && mMT != sos::MethodTable::GetArrayMT())
return NULL;
DacpObjectData objData;
if (FAILED(objData.Request(g_sos, TO_CDADDR(mAddress))))
sos::Throw<DataRead>("Failed to request object data for %s.", DMLListNearObj(mAddress));
if (mMT == NULL)
mMT = TO_TADDR(objData.MethodTable) & ~3;
return TO_TADDR(objData.ElementTypeHandle);
}
bool Object::IsValid(TADDR address, bool verifyFields)
{
DacpObjectData objectData;
if (FAILED(objectData.Request(g_sos, TO_CDADDR(address))))
return false;
if (verifyFields &&
objectData.MethodTable != g_special_usefulGlobals.FreeMethodTable &&
!MethodTable::IsZombie(TO_TADDR(objectData.MethodTable)))
{
return VerifyMemberFields(TO_TADDR(objectData.MethodTable), address);
}
return true;
}
HRESULT ClrDataAccess::ServerGCHeapDetails(CLRDATA_ADDRESS heapAddr, DacpGcHeapDetails *detailsData)
{
if (!heapAddr)
{
// PREfix.
return E_INVALIDARG;
}
SVR::gc_heap *pHeap = PTR_SVR_gc_heap(TO_TADDR(heapAddr));
int i;
detailsData->heapAddr = heapAddr;
detailsData->lowest_address = PTR_CDADDR(g_lowest_address);
detailsData->highest_address = PTR_CDADDR(g_highest_address);
detailsData->card_table = PTR_CDADDR(g_card_table);
detailsData->alloc_allocated = (CLRDATA_ADDRESS)(ULONG_PTR) pHeap->alloc_allocated;
detailsData->ephemeral_heap_segment = (CLRDATA_ADDRESS)(ULONG_PTR) pHeap->ephemeral_heap_segment;
for (i=0;i<NUMBERGENERATIONS;i++)
{
detailsData->generation_table[i].start_segment = (CLRDATA_ADDRESS)(ULONG_PTR) pHeap->generation_table[i].start_segment;
detailsData->generation_table[i].allocation_start = (CLRDATA_ADDRESS)(ULONG_PTR) pHeap->generation_table[i].allocation_start;
detailsData->generation_table[i].allocContextPtr = (CLRDATA_ADDRESS)(ULONG_PTR) pHeap->generation_table[i].allocation_context.alloc_ptr;
detailsData->generation_table[i].allocContextLimit = (CLRDATA_ADDRESS)(ULONG_PTR) pHeap->generation_table[i].allocation_context.alloc_limit;
}
TADDR pFillPointerArray = TO_TADDR(pHeap->finalize_queue) + offsetof(SVR::CFinalize,m_FillPointers);
for(i=0;i<(NUMBERGENERATIONS+SVR::CFinalize::ExtraSegCount);i++)
{
ULONG32 returned = sizeof(size_t);
size_t pValue;
m_target->ReadVirtual(pFillPointerArray+(i*sizeof(size_t)), (PBYTE)&pValue, sizeof(size_t),&returned);
if (returned != sizeof(size_t))
{
return E_FAIL;
}
detailsData->finalization_fill_pointers[i] = (CLRDATA_ADDRESS) pValue;
}
return S_OK;
}
HRESULT
ClrDataAccess::ServerOomData(CLRDATA_ADDRESS addr, DacpOomData *oomData)
{
DPTR(dac_gc_heap) pHeap = __DPtr<dac_gc_heap>(TO_TADDR(addr));
oom_history pOOMInfo = pHeap->oom_info;
oomData->reason = pOOMInfo.reason;
oomData->alloc_size = pOOMInfo.alloc_size;
oomData->available_pagefile_mb = pOOMInfo.available_pagefile_mb;
oomData->gc_index = pOOMInfo.gc_index;
oomData->fgm = pOOMInfo.fgm;
oomData->size = pOOMInfo.size;
oomData->loh_p = pOOMInfo.loh_p;
return S_OK;
}
HRESULT ClrDataAccess::ServerGCHeapAnalyzeData(CLRDATA_ADDRESS heapAddr, DacpGcHeapAnalyzeData *analyzeData)
{
if (!heapAddr)
{
// PREfix.
return E_INVALIDARG;
}
DPTR(dac_gc_heap) pHeap = __DPtr<dac_gc_heap>(TO_TADDR(heapAddr));
analyzeData->heapAddr = heapAddr;
analyzeData->internal_root_array = (CLRDATA_ADDRESS)pHeap->internal_root_array;
analyzeData->internal_root_array_index = (size_t)pHeap->internal_root_array_index;
analyzeData->heap_analyze_success = (BOOL)pHeap->heap_analyze_success;
return S_OK;
}
void Object::CalculateSizeAndPointers() const
{
TADDR mt = GetMT();
MethodTableInfo* info = g_special_mtCache.Lookup((DWORD_PTR)mt);
if (!info->IsInitialized())
{
// this is the first time we see this method table, so we need to get the information
// from the target
FillMTData();
info->BaseSize = mMTData->BaseSize;
info->ComponentSize = mMTData->ComponentSize;
info->bContainsPointers = mMTData->bContainsPointers;
// The following request doesn't work on older runtimes. For those, the
// objects would just look like non-collectible, which is acceptable.
DacpMethodTableCollectibleData mtcd;
if (SUCCEEDED(mtcd.Request(g_sos, GetMT())))
{
info->bCollectible = mtcd.bCollectible;
info->LoaderAllocatorObjectHandle = TO_TADDR(mtcd.LoaderAllocatorObjectHandle);
}
}
if (mSize == (size_t)~0)
{
mSize = info->BaseSize;
if (info->ComponentSize)
{
// this is an array, so the size has to include the size of the components. We read the number
// of components from the target and multiply by the component size to get the size.
mSize += info->ComponentSize * GetNumComponents(GetAddress());
}
// On x64 we do an optimization to save 4 bytes in almost every string we create.
#ifdef _WIN64
// Pad to min object size if necessary
if (mSize < min_obj_size)
mSize = min_obj_size;
#endif // _WIN64
}
mPointers = info->bContainsPointers != FALSE;
}
HRESULT ClrDataAccess::ServerGCHeapDetails(CLRDATA_ADDRESS heapAddr, DacpGcHeapDetails *detailsData)
{
if (!heapAddr)
{
// PREfix.
return E_INVALIDARG;
}
DPTR(dac_gc_heap) pHeap = __DPtr<dac_gc_heap>(TO_TADDR(heapAddr));
int i;
//get global information first
detailsData->heapAddr = heapAddr;
detailsData->lowest_address = PTR_CDADDR(g_lowest_address);
detailsData->highest_address = PTR_CDADDR(g_highest_address);
detailsData->card_table = PTR_CDADDR(g_card_table);
// now get information specific to this heap (server mode gives us several heaps; we're getting
// information about only one of them.
detailsData->alloc_allocated = (CLRDATA_ADDRESS)pHeap->alloc_allocated;
detailsData->ephemeral_heap_segment = (CLRDATA_ADDRESS)dac_cast<TADDR>(pHeap->ephemeral_heap_segment);
// get bounds for the different generations
for (i=0; i<NUMBERGENERATIONS; i++)
{
DPTR(dac_generation) generation = ServerGenerationTableIndex(pHeap, i);
detailsData->generation_table[i].start_segment = (CLRDATA_ADDRESS)dac_cast<TADDR>(generation->start_segment);
detailsData->generation_table[i].allocation_start = (CLRDATA_ADDRESS)(ULONG_PTR)generation->allocation_start;
DPTR(gc_alloc_context) alloc_context = dac_cast<TADDR>(generation) + offsetof(dac_generation, allocation_context);
detailsData->generation_table[i].allocContextPtr = (CLRDATA_ADDRESS)(ULONG_PTR) alloc_context->alloc_ptr;
detailsData->generation_table[i].allocContextLimit = (CLRDATA_ADDRESS)(ULONG_PTR) alloc_context->alloc_limit;
}
DPTR(dac_finalize_queue) fq = pHeap->finalize_queue;
DPTR(uint8_t*) pFillPointerArray= dac_cast<TADDR>(fq) + offsetof(dac_finalize_queue, m_FillPointers);
for(i=0; i<(NUMBERGENERATIONS+dac_finalize_queue::ExtraSegCount); i++)
{
detailsData->finalization_fill_pointers[i] = (CLRDATA_ADDRESS) pFillPointerArray[i];
}
return S_OK;
}
bool Object::TryGetHeader(ULONG &outHeader) const
{
struct ObjectHeader
{
#ifdef _WIN64
ULONG _alignpad;
#endif
ULONG SyncBlockValue; // the Index and the Bits
};
ObjectHeader header;
if (SUCCEEDED(rvCache->Read(TO_TADDR(GetAddress() - sizeof(ObjectHeader)), &header, sizeof(ObjectHeader), NULL)))
{
outHeader = header.SyncBlockValue;
return true;
}
return false;
}
HRESULT GetServerHeapData(CLRDATA_ADDRESS addr, DacpHeapSegmentData *pSegment)
{
if (!addr)
{
// PREfix.
return E_INVALIDARG;
}
SVR::heap_segment *pHeapSegment =
__DPtr<SVR::heap_segment>(TO_TADDR(addr));
pSegment->segmentAddr = addr;
pSegment->allocated = (CLRDATA_ADDRESS)(ULONG_PTR) pHeapSegment->allocated;
pSegment->committed = (CLRDATA_ADDRESS)(ULONG_PTR) pHeapSegment->committed;
pSegment->reserved = (CLRDATA_ADDRESS)(ULONG_PTR) pHeapSegment->reserved;
pSegment->used = (CLRDATA_ADDRESS)(ULONG_PTR) pHeapSegment->used;
pSegment->mem = (CLRDATA_ADDRESS)(ULONG_PTR) pHeapSegment->mem;
pSegment->next = (CLRDATA_ADDRESS)(ULONG_PTR) pHeapSegment->next;
pSegment->gc_heap = (CLRDATA_ADDRESS)(ULONG_PTR) pHeapSegment->heap;
return S_OK;
}
bool Object::GetThinLock(ThinLockInfo &out) const
{
ULONG header = GetHeader();
if (header & (BIT_SBLK_IS_HASH_OR_SYNCBLKINDEX | BIT_SBLK_SPIN_LOCK))
{
return false;
}
out.ThreadId = header & SBLK_MASK_LOCK_THREADID;
out.Recursion = (header & SBLK_MASK_LOCK_RECLEVEL) >> SBLK_RECLEVEL_SHIFT;
CLRDATA_ADDRESS threadPtr = NULL;
if (g_sos->GetThreadFromThinlockID(out.ThreadId, &threadPtr) != S_OK)
{
out.ThreadPtr = NULL;
}
else
{
out.ThreadPtr = TO_TADDR(threadPtr);
}
return out.ThreadId != 0 && out.ThreadPtr != NULL;
}
HRESULT GetServerHeapData(CLRDATA_ADDRESS addr, DacpHeapSegmentData *pSegment)
{
// get field values (target addresses) for the heap segment at addr
if (!addr)
{
// PREfix.
return E_INVALIDARG;
}
// marshal the segment from target to host
dac_heap_segment *pHeapSegment = __DPtr<dac_heap_segment>(TO_TADDR(addr));
// initialize fields by copying from the marshaled segment (note that these are all target addresses)
pSegment->segmentAddr = addr;
pSegment->allocated = (CLRDATA_ADDRESS)(ULONG_PTR) pHeapSegment->allocated;
pSegment->committed = (CLRDATA_ADDRESS)(ULONG_PTR) pHeapSegment->committed;
pSegment->reserved = (CLRDATA_ADDRESS)(ULONG_PTR) pHeapSegment->reserved;
pSegment->used = (CLRDATA_ADDRESS)(ULONG_PTR) pHeapSegment->used;
pSegment->mem = (CLRDATA_ADDRESS)(ULONG_PTR) (pHeapSegment->mem);
pSegment->next = (CLRDATA_ADDRESS)dac_cast<TADDR>(pHeapSegment->next);
pSegment->gc_heap = (CLRDATA_ADDRESS)pHeapSegment->heap;
return S_OK;
}
HRESULT
ClrDataAccess::ServerGCInterestingInfoData(CLRDATA_ADDRESS addr, DacpGCInterestingInfoData *interestingInfoData)
{
#ifdef GC_CONFIG_DRIVEN
dac_gc_heap *pHeap = __DPtr<dac_gc_heap>(TO_TADDR(addr));
size_t* dataPoints = (size_t*)&(pHeap->interesting_data_per_heap);
for (int i = 0; i < NUM_GC_DATA_POINTS; i++)
interestingInfoData->interestingDataPoints[i] = dataPoints[i];
size_t* mechanisms = (size_t*)&(pHeap->compact_reasons_per_heap);
for (int i = 0; i < MAX_COMPACT_REASONS_COUNT; i++)
interestingInfoData->compactReasons[i] = mechanisms[i];
mechanisms = (size_t*)&(pHeap->expand_mechanisms_per_heap);
for (int i = 0; i < MAX_EXPAND_MECHANISMS_COUNT; i++)
interestingInfoData->expandMechanisms[i] = mechanisms[i];
mechanisms = (size_t*)&(pHeap->interesting_mechanism_bits_per_heap);
for (int i = 0; i < MAX_GC_MECHANISM_BITS_COUNT; i++)
interestingInfoData->bitMechanisms[i] = mechanisms[i];
return S_OK;
#else
return E_NOTIMPL;
#endif //GC_CONFIG_DRIVEN
}
