/**
* Allocate and initialize the receivers internal structures.
* @return true on success, false on failure.
*/
bool
MM_ParallelSweepChunkArray::initialize(MM_EnvironmentBase* env, bool useVmem)
{
bool result = false;
MM_GCExtensionsBase* extensions = env->getExtensions();
_useVmem = useVmem;
if (extensions->isFvtestForceSweepChunkArrayCommitFailure()) {
Trc_MM_SweepHeapSectioning_parallelSweepChunkArrayCommitFailureForced(env->getLanguageVMThread());
} else {
if (useVmem) {
MM_MemoryManager* memoryManager = extensions->memoryManager;
if (memoryManager->createVirtualMemoryForMetadata(env, &_memoryHandle, extensions->heapAlignment, _size * sizeof(MM_ParallelSweepChunk))) {
void* base = memoryManager->getHeapBase(&_memoryHandle);
result = memoryManager->commitMemory(&_memoryHandle, base, _size * sizeof(MM_ParallelSweepChunk));
if (!result) {
Trc_MM_SweepHeapSectioning_parallelSweepChunkArrayCommitFailed(env->getLanguageVMThread(), base, _size * sizeof(MM_ParallelSweepChunk));
}
_array = (MM_ParallelSweepChunk*)base;
}
} else {
if (0 != _size) {
_array = (MM_ParallelSweepChunk*)env->getForge()->allocate(_size * sizeof(MM_ParallelSweepChunk), MM_AllocationCategory::FIXED, OMR_GET_CALLSITE());
result = (NULL != _array);
} else {
result = true;
}
}
}
return result;
}
/**
* Attach a physical arena of the specified size to the receiver.
* This reserves the address space within the receiver for the arena, and connects the arena to the list
* of those associated to the receiver (in address order).
*
* @return true if the arena was attached successfully, false otherwise.
* @note The memory reseved is not commited.
*/
bool
MM_HeapVirtualMemory::attachArena(MM_EnvironmentBase* env, MM_PhysicalArena* arena, uintptr_t size)
{
/* Sanity check of the size */
if (getMaximumMemorySize() < size) {
return false;
}
MM_GCExtensionsBase* extensions = env->getExtensions();
MM_MemoryManager* memoryManager = extensions->memoryManager;
/* Find the insertion point for the currentArena */
void* candidateBase = memoryManager->getHeapBase(&_vmemHandle);
MM_PhysicalArena* insertionHead = NULL;
MM_PhysicalArena* insertionTail = _physicalArena;
MM_PhysicalArena* currentArena = arena;
while (insertionTail) {
if ((((uintptr_t)insertionTail->getLowAddress()) - ((uintptr_t)candidateBase)) >= size) {
break;
}
candidateBase = insertionTail->getHighAddress();
insertionHead = insertionTail;
insertionTail = insertionTail->getNextArena();
}
/* If we have reached the end of the currentArena list, check if there is room between the candidateBase
* and the end of virtual memory */
if (!insertionTail) {
if ((memoryManager->calculateOffsetToHeapTop(&_vmemHandle, candidateBase)) < size) {
return false;
}
}
/* Connect the physical currentArena into the list at the appropriate point */
currentArena->setPreviousArena(insertionHead);
currentArena->setNextArena(insertionTail);
if (insertionTail) {
insertionTail->setPreviousArena(currentArena);
}
if (insertionHead) {
insertionHead->setNextArena(currentArena);
} else {
_physicalArena = currentArena;
}
currentArena->setLowAddress(candidateBase);
currentArena->setHighAddress((void*)(((uint8_t*)candidateBase) + size));
/* Set the arena state to being attached */
arena->setAttached(true);
return true;
}
bool
MM_HeapRegionManagerTarok::enableRegionsInTable(MM_EnvironmentBase *env, MM_MemoryHandle *handle)
{
bool result = true;
MM_GCExtensionsBase *extensions = env->getExtensions();
MM_MemoryManager *memoryManager = extensions->memoryManager;
void *lowHeapEdge = memoryManager->getHeapBase(handle);
void *highHeapEdge = memoryManager->getHeapTop(handle);
/* maintained for RTJ */
setNodeAndLinkRegions(env, lowHeapEdge, highHeapEdge, 0);
return result;
}
bool
MM_HeapVirtualMemory::initializeHeapRegionManager(MM_EnvironmentBase* env, MM_HeapRegionManager* manager)
{
bool result = false;
/* since this kind of heap is backed by contiguous memory, tell the heap region manager (which was just
* initialized by super) that we want to enable this range of regions for later use.
*/
MM_MemoryManager* memoryManager = MM_GCExtensionsBase::getExtensions(_omrVM)->memoryManager;
void* heapBase = memoryManager->getHeapBase(&_vmemHandle);
void* heapTop = memoryManager->getHeapTop(&_vmemHandle);
if (manager->setContiguousHeapRange(env, heapBase, heapTop)) {
result = manager->enableRegionsInTable(env, &_vmemHandle);
}
return result;
}
/**
* Find and return the backing store addresses base.
* This routine uses the backing store of the base array and uses this memory as the return value.
* @return base address of the backing store.
*/
void*
MM_SweepHeapSectioning::getBackingStoreAddress()
{
MM_MemoryManager* memoryManager = _extensions->memoryManager;
return (void*)memoryManager->getHeapBase(&_baseArray->_memoryHandle);
}
/**
* Answer the lowest possible address for the heap that will ever be possible.
* @return Lowest address possible for the heap.
*/
void*
MM_HeapVirtualMemory::getHeapBase()
{
MM_MemoryManager* memoryManager = MM_GCExtensionsBase::getExtensions(_omrVM)->memoryManager;
return memoryManager->getHeapBase(&_vmemHandle);
}