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* Copyright (C) 2007 Apple Inc. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "CollectorHeapIntrospector.h"
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#include "collector.h"
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#include "MallocZoneSupport.h"
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malloc_introspection_t jscore_collector_introspection = { &CollectorHeapIntrospector::enumerate, &CollectorHeapIntrospector::goodSize, &CollectorHeapIntrospector::check, &CollectorHeapIntrospector::print,
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&CollectorHeapIntrospector::log, &CollectorHeapIntrospector::forceLock, &CollectorHeapIntrospector::forceUnlock, &CollectorHeapIntrospector::statistics };
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void CollectorHeapIntrospector::init(CollectorHeap* heap)
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static CollectorHeapIntrospector zone(heap);
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CollectorHeapIntrospector::CollectorHeapIntrospector(CollectorHeap* heap)
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memset(&m_zone, 0, sizeof(m_zone));
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m_zone.zone_name = "JavaScriptCore Collector";
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m_zone.size = &CollectorHeapIntrospector::size;
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m_zone.malloc = &CollectorHeapIntrospector::zoneMalloc;
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m_zone.calloc = &CollectorHeapIntrospector::zoneCalloc;
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m_zone.realloc = &CollectorHeapIntrospector::zoneRealloc;
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m_zone.free = &CollectorHeapIntrospector::zoneFree;
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m_zone.valloc = &CollectorHeapIntrospector::zoneValloc;
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m_zone.destroy = &CollectorHeapIntrospector::zoneDestroy;
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m_zone.introspect = &jscore_collector_introspection;
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malloc_zone_register(&m_zone);
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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)
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RemoteMemoryReader memoryReader(task, reader);
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CollectorHeapIntrospector* zone = memoryReader(reinterpret_cast<CollectorHeapIntrospector*>(zoneAddress));
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CollectorHeap* heap = memoryReader(zone->m_heap);
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CollectorBlock** blocks = memoryReader(heap->blocks);
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for (unsigned i = 0; i < heap->usedBlocks; i++) {
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vm_address_t remoteBlockAddress = reinterpret_cast<vm_address_t>(blocks[i]);
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vm_range_t ptrRange = { remoteBlockAddress, sizeof(CollectorBlock) };
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if (typeMask & (MALLOC_PTR_REGION_RANGE_TYPE | MALLOC_ADMIN_REGION_RANGE_TYPE))
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(*recorder)(task, context, MALLOC_PTR_REGION_RANGE_TYPE, &ptrRange, 1);
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// Recording individual cells causes frequent false-positives. Any garbage cells
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// which have yet to be collected are labeled as leaks. Recording on a per-block
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// basis provides less detail but avoids these false-positives.
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if (memoryReader(blocks[i])->usedCells && (typeMask & MALLOC_PTR_IN_USE_RANGE_TYPE))
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(*recorder)(task, context, MALLOC_PTR_IN_USE_RANGE_TYPE, &ptrRange, 1);