CollectorHeapIntrospector.cpp [plain text]
#include "config.h"
#include "CollectorHeapIntrospector.h"
#include "collector.h"
#include "MallocZoneSupport.h"
namespace KJS {
extern "C" {
malloc_introspection_t jscore_collector_introspection = { &CollectorHeapIntrospector::enumerate, &CollectorHeapIntrospector::goodSize, &CollectorHeapIntrospector::check, &CollectorHeapIntrospector::print,
&CollectorHeapIntrospector::log, &CollectorHeapIntrospector::forceLock, &CollectorHeapIntrospector::forceUnlock, &CollectorHeapIntrospector::statistics };
}
void CollectorHeapIntrospector::init(CollectorHeap* primaryHeap, CollectorHeap* numberHeap)
{
static CollectorHeapIntrospector zone(primaryHeap, numberHeap);
}
CollectorHeapIntrospector::CollectorHeapIntrospector(CollectorHeap* primaryHeap, CollectorHeap* numberHeap)
: m_primaryHeap(primaryHeap)
, m_numberHeap(numberHeap)
{
memset(&m_zone, 0, sizeof(m_zone));
m_zone.zone_name = "JavaScriptCore Collector";
m_zone.size = &CollectorHeapIntrospector::size;
m_zone.malloc = &CollectorHeapIntrospector::zoneMalloc;
m_zone.calloc = &CollectorHeapIntrospector::zoneCalloc;
m_zone.realloc = &CollectorHeapIntrospector::zoneRealloc;
m_zone.free = &CollectorHeapIntrospector::zoneFree;
m_zone.valloc = &CollectorHeapIntrospector::zoneValloc;
m_zone.destroy = &CollectorHeapIntrospector::zoneDestroy;
m_zone.introspect = &jscore_collector_introspection;
malloc_zone_register(&m_zone);
}
kern_return_t CollectorHeapIntrospector::enumerate(task_t task, void* context, unsigned typeMask, vm_address_t zoneAddress, memory_reader_t reader, vm_range_recorder_t recorder)
{
RemoteMemoryReader memoryReader(task, reader);
CollectorHeapIntrospector* zone = memoryReader(reinterpret_cast<CollectorHeapIntrospector*>(zoneAddress));
CollectorHeap* heaps[2] = {memoryReader(zone->m_primaryHeap), memoryReader(zone->m_numberHeap)};
if (!heaps[0]->blocks && !heaps[1]->blocks)
return 0;
for (int currentHeap = 0; currentHeap < 2; currentHeap++) {
CollectorHeap* heap = heaps[currentHeap];
CollectorBlock** blocks = memoryReader(heap->blocks);
for (unsigned i = 0; i < heap->usedBlocks; i++) {
vm_address_t remoteBlockAddress = reinterpret_cast<vm_address_t>(blocks[i]);
vm_range_t ptrRange = { remoteBlockAddress, sizeof(CollectorBlock) };
if (typeMask & (MALLOC_PTR_REGION_RANGE_TYPE | MALLOC_ADMIN_REGION_RANGE_TYPE))
(*recorder)(task, context, MALLOC_PTR_REGION_RANGE_TYPE, &ptrRange, 1);
if (memoryReader(blocks[i])->usedCells && (typeMask & MALLOC_PTR_IN_USE_RANGE_TYPE))
(*recorder)(task, context, MALLOC_PTR_IN_USE_RANGE_TYPE, &ptrRange, 1);
}
}
return 0;
}
}