LargeHeapBlock*
LargeHeapBucket::AddLargeHeapBlock(size_t size, bool nothrow)
{
Recycler* recycler = this->heapInfo->recycler;
Segment * segment;
size_t pageCount = LargeHeapBlock::GetPagesNeeded(size, this->supportFreeList);
if (pageCount == 0)
{
if (nothrow == false)
{
// overflow
// Since nothrow is false here, it's okay to throw
recycler->OutOfMemory();
}
return nullptr;
}
char * address = nullptr;
size_t realPageCount = pageCount;
address = recycler->GetRecyclerLargeBlockPageAllocator()->Alloc(&realPageCount, &segment);
pageCount = realPageCount;
if (address == nullptr)
{
return nullptr;
}
#ifdef RECYCLER_ZERO_MEM_CHECK
recycler->VerifyZeroFill(address, pageCount * AutoSystemInfo::PageSize);
#endif
uint objectCount = LargeHeapBlock::GetMaxLargeObjectCount(pageCount, size);
LargeHeapBlock * heapBlock = LargeHeapBlock::New(address, pageCount, segment, objectCount, supportFreeList ? this : nullptr);
#if DBG
LargeAllocationVerboseTrace(recycler->GetRecyclerFlagsTable(), _u("Allocated new large heap block 0x%p for sizeCat 0x%x\n"), heapBlock, sizeCat);
#endif
#ifdef ENABLE_JS_ETW
#if ENABLE_DEBUG_CONFIG_OPTIONS
if (segment->GetPageCount() > recycler->GetRecyclerLargeBlockPageAllocator()->GetMaxAllocPageCount())
{
EventWriteJSCRIPT_INTERNAL_RECYCLER_EXTRALARGE_OBJECT_ALLOC(size);
}
#endif
#endif
if (!heapBlock)
{
recycler->GetRecyclerLargeBlockPageAllocator()->SuspendIdleDecommit();
recycler->GetRecyclerLargeBlockPageAllocator()->Release(address, pageCount, segment);
recycler->GetRecyclerLargeBlockPageAllocator()->ResumeIdleDecommit();
return nullptr;
}
#if ENABLE_PARTIAL_GC
recycler->autoHeap.uncollectedNewPageCount += pageCount;
#endif
RECYCLER_SLOW_CHECK(this->heapInfo->heapBlockCount[HeapBlock::HeapBlockType::LargeBlockType]++);
heapBlock->heapInfo = this->heapInfo;
heapBlock->lastCollectAllocCount = 0;
Assert(recycler->collectionState != CollectionStateMark);
if (!recycler->heapBlockMap.SetHeapBlock(address, pageCount, heapBlock, HeapBlock::HeapBlockType::LargeBlockType, 0))
{
recycler->GetRecyclerLargeBlockPageAllocator()->SuspendIdleDecommit();
heapBlock->ReleasePages(recycler);
recycler->GetRecyclerLargeBlockPageAllocator()->ResumeIdleDecommit();
LargeHeapBlock::Delete(heapBlock);
RECYCLER_SLOW_CHECK(this->heapInfo->heapBlockCount[HeapBlock::HeapBlockType::LargeBlockType]--);
return nullptr;
}
heapBlock->SetNextBlock(this->largeBlockList);
this->largeBlockList = heapBlock;
RECYCLER_PERF_COUNTER_ADD(FreeObjectSize, heapBlock->GetPageCount() * AutoSystemInfo::PageSize);
return heapBlock;
}
char*
LargeHeapBucket::PageHeapAlloc(Recycler * recycler, size_t sizeCat, size_t size, ObjectInfoBits attributes, PageHeapMode mode, bool nothrow)
{
Segment * segment;
size_t pageCount = LargeHeapBlock::GetPagesNeeded(size, false);
if (pageCount == 0)
{
if (nothrow == false)
{
// overflow
// Since nothrow is false here, it's okay to throw
recycler->OutOfMemory();
}
return nullptr;
}
if(size<sizeof(void*))
{
attributes = (ObjectInfoBits)(attributes | LeafBit);
}
size_t actualPageCount = pageCount + 1; // 1 for guard page
auto pageAllocator = recycler->GetRecyclerLargeBlockPageAllocator();
char * baseAddress = pageAllocator->Alloc(&actualPageCount, &segment);
if (baseAddress == nullptr)
{
return nullptr;
}
size_t guardPageCount = actualPageCount - pageCount; // pageAllocator can return more than asked pages
char* address = nullptr;
char* guardPageAddress = nullptr;
if (heapInfo->pageHeapMode == PageHeapMode::PageHeapModeBlockStart)
{
address = baseAddress + AutoSystemInfo::PageSize * guardPageCount;
guardPageAddress = baseAddress;
}
else if (heapInfo->pageHeapMode == PageHeapMode::PageHeapModeBlockEnd)
{
address = baseAddress;
guardPageAddress = baseAddress + pageCount * AutoSystemInfo::PageSize;
}
else
{
AnalysisAssert(false);
}
LargeHeapBlock * heapBlock = LargeHeapBlock::New(address, pageCount, segment, 1, nullptr);
if (!heapBlock)
{
pageAllocator->SuspendIdleDecommit();
pageAllocator->Release(baseAddress, actualPageCount, segment);
pageAllocator->ResumeIdleDecommit();
return nullptr;
}
heapBlock->heapInfo = this->heapInfo;
heapBlock->actualPageCount = actualPageCount;
heapBlock->guardPageAddress = guardPageAddress;
// fill pattern before set pageHeapMode, so background scan stack may verify the pattern
size_t usedSpace = sizeof(LargeObjectHeader) + size;
memset(address + usedSpace, 0xF0, pageCount * AutoSystemInfo::PageSize - usedSpace);
heapBlock->pageHeapMode = heapInfo->pageHeapMode;
if (!recycler->heapBlockMap.SetHeapBlock(address, pageCount, heapBlock, HeapBlock::HeapBlockType::LargeBlockType, 0))
{
pageAllocator->SuspendIdleDecommit();
heapBlock->ReleasePages(recycler);
pageAllocator->ResumeIdleDecommit();
LargeHeapBlock::Delete(heapBlock);
return nullptr;
}
heapBlock->ResetMarks(ResetMarkFlags_None, recycler);
char * memBlock = heapBlock->Alloc(size, attributes);
Assert(memBlock != nullptr);
#pragma prefast(suppress:6250, "This method decommits memory")
if (::VirtualFree(guardPageAddress, AutoSystemInfo::PageSize * guardPageCount, MEM_DECOMMIT) == FALSE)
{
AssertMsg(false, "Unable to decommit guard page.");
ReportFatalException(NULL, E_FAIL, Fatal_Internal_Error, 2);
return nullptr;
}
if (this->largePageHeapBlockList)
{
HeapBlockList::Tail(this->largePageHeapBlockList)->SetNextBlock(heapBlock);
}
else
{
this->largePageHeapBlockList = heapBlock;
}
#if ENABLE_PARTIAL_GC
recycler->autoHeap.uncollectedNewPageCount += pageCount;
#endif
RECYCLER_SLOW_CHECK(this->heapInfo->heapBlockCount[HeapBlock::HeapBlockType::LargeBlockType]++);
RECYCLER_PERF_COUNTER_ADD(FreeObjectSize, heapBlock->GetPageCount() * AutoSystemInfo::PageSize);
if (recycler->ShouldCapturePageHeapAllocStack())
{
heapBlock->CapturePageHeapAllocStack();
}
return memBlock;
}
void
SmallHeapBlockAllocator<TBlockType>::Clear()
{
TBlockType * heapBlock = this->heapBlock;
if (heapBlock != nullptr)
{
Assert(heapBlock->isInAllocator);
heapBlock->isInAllocator = false;
FreeObject * remainingFreeObjectList = nullptr;
if (this->endAddress != nullptr)
{
#ifdef RECYCLER_TRACK_NATIVE_ALLOCATED_OBJECTS
TrackNativeAllocatedObjects();
lastNonNativeBumpAllocatedBlock = nullptr;
#endif
#ifdef PROFILE_RECYCLER_ALLOC
// Need to tell the tracker
this->bucket->heapInfo->recycler->TrackUnallocated((char *)this->freeObjectList, this->endAddress, this->bucket->sizeCat);
#endif
RecyclerMemoryTracking::ReportUnallocated(this->heapBlock->heapBucket->heapInfo->recycler, (char *)this->freeObjectList, this->endAddress, heapBlock->heapBucket->sizeCat);
#ifdef RECYCLER_PERF_COUNTERS
size_t unallocatedObjects = heapBlock->objectCount - ((char *)this->freeObjectList - heapBlock->address) / heapBlock->objectSize;
size_t unallocatedObjectBytes = unallocatedObjects * heapBlock->GetObjectSize();
RECYCLER_PERF_COUNTER_ADD(LiveObject, unallocatedObjects);
RECYCLER_PERF_COUNTER_ADD(LiveObjectSize, unallocatedObjectBytes);
RECYCLER_PERF_COUNTER_SUB(FreeObjectSize, unallocatedObjectBytes);
RECYCLER_PERF_COUNTER_ADD(SmallHeapBlockLiveObject, unallocatedObjects);
RECYCLER_PERF_COUNTER_ADD(SmallHeapBlockLiveObjectSize, unallocatedObjectBytes);
RECYCLER_PERF_COUNTER_SUB(SmallHeapBlockFreeObjectSize, unallocatedObjectBytes);
#endif
Assert(heapBlock->freeObjectList == nullptr);
this->endAddress = nullptr;
}
else
{
remainingFreeObjectList = this->freeObjectList;
heapBlock->freeObjectList = remainingFreeObjectList;
}
this->freeObjectList = nullptr;
// this->freeObjectList and this->lastFreeCount are accessed in SmallHeapBlock::ResetMarks
// the order of access there is first we see if lastFreeCount = 0, and if it is, we assert
// that freeObjectList = null. Because of ARM's memory model, we need to insert barriers
// so that the two variables can be accessed correctly across threads. Here, after we write
// to this->freeObjectList, we insert a write barrier so that if this->lastFreeCount is 0,
// this->freeObjectList must have been set to null. On the other end, we stick a read barrier
// We use the MemoryBarrier macro because of ARMs lack of a separate read barrier
#if defined(_M_ARM32_OR_ARM64)
#if DBG
MemoryBarrier();
#endif
#endif
if (remainingFreeObjectList == nullptr)
{
uint lastFreeCount = heapBlock->GetAndClearLastFreeCount();
heapBlock->heapBucket->heapInfo->uncollectedAllocBytes += lastFreeCount * heapBlock->GetObjectSize();
Assert(heapBlock->lastUncollectedAllocBytes == 0);
DebugOnly(heapBlock->lastUncollectedAllocBytes = lastFreeCount * heapBlock->GetObjectSize());
}
else
{
DebugOnly(heapBlock->SetIsClearedFromAllocator(true));
}
this->heapBlock = nullptr;
RECYCLER_SLOW_CHECK(heapBlock->CheckDebugFreeBitVector(false));
}
else if (this->freeObjectList != nullptr)
{
// Explicit Free Object List
#ifdef RECYCLER_MEMORY_VERIFY
FreeObject* freeObject = this->freeObjectList;
while (freeObject)
{
HeapBlock* heapBlock = this->bucket->GetRecycler()->FindHeapBlock((void*) freeObject);
Assert(heapBlock != nullptr);
Assert(!heapBlock->IsLargeHeapBlock());
TBlockType* smallBlock = (TBlockType*)heapBlock;
smallBlock->ClearExplicitFreeBitForObject((void*) freeObject);
freeObject = freeObject->GetNext();
}
#endif
this->freeObjectList = nullptr;
}
}
char*
LargeHeapBucket::PageHeapAlloc(Recycler * recycler, size_t size, ObjectInfoBits attributes, PageHeapMode mode, bool nothrow)
{
size_t sizeCat = HeapInfo::GetAlignedSizeNoCheck(size);
Segment * segment;
size_t pageCount = LargeHeapBlock::GetPagesNeeded(size, this->supportFreeList);
if (pageCount == 0)
{
if (nothrow == false)
{
// overflow
// Since nothrow is false here, it's okay to throw
recycler->OutOfMemory();
}
return nullptr;
}
size_t actualPageCount = pageCount + 1; // for page heap
char * baseAddress = recycler->GetRecyclerLargeBlockPageAllocator()->Alloc(&actualPageCount, &segment);
if (baseAddress == nullptr)
{
return nullptr;
}
char* address = nullptr;
char* guardPageAddress = nullptr;
DWORD guardPageOldProtectFlags = PAGE_NOACCESS;
if (heapInfo->pageHeapMode == PageHeapMode::PageHeapModeBlockStart)
{
address = baseAddress + AutoSystemInfo::PageSize;
guardPageAddress = baseAddress;
}
else if (heapInfo->pageHeapMode == PageHeapMode::PageHeapModeBlockEnd)
{
address = baseAddress;
guardPageAddress = baseAddress + pageCount* AutoSystemInfo::PageSize;
}
else
{
AnalysisAssert(false);
}
if (::VirtualProtect(static_cast<LPVOID>(guardPageAddress), AutoSystemInfo::PageSize, PAGE_NOACCESS, &guardPageOldProtectFlags) == FALSE)
{
AssertMsg(false, "Unable to set permission for guard page.");
return nullptr;
}
#ifdef RECYCLER_ZERO_MEM_CHECK
recycler->VerifyZeroFill(address, pageCount * AutoSystemInfo::PageSize);
#endif
LargeHeapBlock * heapBlock = LargeHeapBlock::New(address, pageCount, segment, 1, nullptr);
if (!heapBlock)
{
recycler->GetRecyclerLargeBlockPageAllocator()->SuspendIdleDecommit();
recycler->GetRecyclerLargeBlockPageAllocator()->Release(address, actualPageCount, segment);
recycler->GetRecyclerLargeBlockPageAllocator()->ResumeIdleDecommit();
return nullptr;
}
heapBlock->actualPageCount = actualPageCount;
heapBlock->guardPageAddress = guardPageAddress;
heapBlock->guardPageOldProtectFlags = guardPageOldProtectFlags;
heapBlock->pageHeapMode = heapInfo->pageHeapMode;
if (heapBlock->pageHeapMode == PageHeapMode::PageHeapModeBlockEnd)
{
// TODO: pad the address to close-most to the guard page to increase the chance to hit guard page when overflow
// some Mark code need to be updated to support this
// heapBlock->SetEndAllocAddress(address
// + AutoSystemInfo::PageSize - (((AllocSizeMath::Add(sizeCat, sizeof(LargeObjectHeader)) - 1) % AutoSystemInfo::PageSize) / HeapInfo::ObjectGranularity + 1) * HeapInfo::ObjectGranularity);
}
#if DBG
LargeAllocationVerboseTrace(recycler->GetRecyclerFlagsTable(), _u("Allocated new large heap block 0x%p for sizeCat 0x%x\n"), heapBlock, sizeCat);
#endif
#ifdef ENABLE_JS_ETW
#if ENABLE_DEBUG_CONFIG_OPTIONS
if (segment->GetPageCount() > recycler->GetRecyclerLargeBlockPageAllocator()->GetMaxAllocPageCount())
{
EventWriteJSCRIPT_INTERNAL_RECYCLER_EXTRALARGE_OBJECT_ALLOC(size);
}
#endif
#endif
#if ENABLE_PARTIAL_GC
recycler->autoHeap.uncollectedNewPageCount += pageCount;
#endif
RECYCLER_SLOW_CHECK(this->heapInfo->heapBlockCount[HeapBlock::HeapBlockType::LargeBlockType]++);
heapBlock->heapInfo = this->heapInfo;
Assert(recycler->collectionState != CollectionStateMark);
if (!recycler->heapBlockMap.SetHeapBlock(address, pageCount, heapBlock, HeapBlock::HeapBlockType::LargeBlockType, 0))
{
recycler->GetRecyclerLargeBlockPageAllocator()->SuspendIdleDecommit();
heapBlock->ReleasePages<true>(recycler);
recycler->GetRecyclerLargeBlockPageAllocator()->ResumeIdleDecommit();
LargeHeapBlock::Delete(heapBlock);
RECYCLER_SLOW_CHECK(this->heapInfo->heapBlockCount[HeapBlock::HeapBlockType::LargeBlockType]--);
return nullptr;
}
heapBlock->ResetMarks(ResetMarkFlags_None, recycler);
if (this->largePageHeapBlockList)
{
HeapBlockList::Tail(this->largePageHeapBlockList)->SetNextBlock(heapBlock);
}
else
{
this->largePageHeapBlockList = heapBlock;
}
RECYCLER_PERF_COUNTER_ADD(FreeObjectSize, heapBlock->GetPageCount() * AutoSystemInfo::PageSize);
char * memBlock = heapBlock->Alloc(sizeCat, attributes);
Assert(memBlock != nullptr);
if (recycler->ShouldCapturePageHeapAllocStack())
{
heapBlock->CapturePageHeapAllocStack();
}
return memBlock;
}
void
SmallHeapBlockAllocator<TBlockType>::TrackNativeAllocatedObjects()
{
Assert(this->freeObjectList != nullptr && endAddress != nullptr);
Assert(this->heapBlock != nullptr);
#if defined(PROFILE_RECYCLER_ALLOC) || defined(RECYCLER_MEMORY_VERIFY) || defined(MEMSPECT_TRACKING) || defined(ETW_MEMORY_TRACKING)
if (pfnTrackNativeAllocatedObjectCallBack == nullptr)
{
return;
}
if (lastNonNativeBumpAllocatedBlock == nullptr)
{
#ifdef RECYCLER_PAGE_HEAP
Assert((char *)this->freeObjectList == this->heapBlock->GetAddress() || ((SmallHeapBlock*) this->heapBlock)->InPageHeapMode());
#else
Assert((char *)this->freeObjectList == this->heapBlock->GetAddress());
#endif
return;
}
Recycler * recycler = this->heapBlock->heapBucket->heapInfo->recycler;
size_t sizeCat = this->heapBlock->heapBucket->sizeCat;
char * curr = lastNonNativeBumpAllocatedBlock + sizeCat;
Assert(curr <= (char *)this->freeObjectList);
#if DBG_DUMP
AllocationVerboseTrace(recycler->GetRecyclerFlagsTable(), _u("TrackNativeAllocatedObjects: recycler = 0x%p, sizeCat = %u, lastRuntimeAllocatedBlock = 0x%p, freeObjectList = 0x%p, nativeAllocatedObjectCount = %u\n"),
recycler, sizeCat, this->lastNonNativeBumpAllocatedBlock, this->freeObjectList, ((char *)this->freeObjectList - curr) / sizeCat);
#endif
while (curr < (char *)this->freeObjectList)
{
pfnTrackNativeAllocatedObjectCallBack(recycler, curr, sizeCat);
curr += sizeCat;
}
#elif defined(RECYCLER_PERF_COUNTERS)
if (lastNonNativeBumpAllocatedBlock == nullptr)
{
return;
}
size_t sizeCat = this->heapBlock->heapBucket->sizeCat;
char * curr = lastNonNativeBumpAllocatedBlock + sizeCat;
Assert(curr <= (char *)this->freeObjectList);
size_t byteCount = ((char *)this->freeObjectList - curr);
#if DBG_DUMP
AllocationVerboseTrace(_u("TrackNativeAllocatedObjects: recycler = 0x%p, sizeCat = %u, lastRuntimeAllocatedBlock = 0x%p, freeObjectList = 0x%p, nativeAllocatedObjectCount = %u\n"),
recycler, sizeCat, this->lastNonNativeBumpAllocatedBlock, this->freeObjectList, ((char *)this->freeObjectList - curr) / sizeCat);
#endif
RECYCLER_PERF_COUNTER_ADD(LiveObject, byteCount / sizeCat);
RECYCLER_PERF_COUNTER_ADD(LiveObjectSize, byteCount);
RECYCLER_PERF_COUNTER_SUB(FreeObjectSize, byteCount);
RECYCLER_PERF_COUNTER_ADD(SmallHeapBlockLiveObject, byteCount / sizeCat);
RECYCLER_PERF_COUNTER_ADD(SmallHeapBlockLiveObjectSize, byteCount);
RECYCLER_PERF_COUNTER_SUB(SmallHeapBlockFreeObjectSize, byteCount);
#else
#error Not implemented
#endif
}
