| /* |
| * Copyright (C) 2014, 2015 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef Zone_h |
| #define Zone_h |
| |
| #include "FixedVector.h" |
| #include "Range.h" |
| #include "StaticMutex.h" |
| #include <malloc/malloc.h> |
| #include <mutex> |
| |
| namespace bmalloc { |
| |
| class Chunk; |
| |
| class Zone : public malloc_zone_t { |
| public: |
| // Enough capacity to track a 64GB heap, so probably enough for anything. |
| static const size_t capacity = 2048; |
| |
| Zone(std::lock_guard<StaticMutex>&); |
| Zone(task_t, memory_reader_t, vm_address_t); |
| |
| void addRange(Range); |
| FixedVector<Range, capacity>& ranges() { return m_ranges; } |
| |
| private: |
| // This vector has two purposes: |
| // (1) It stores the list of Chunks so that we can enumerate |
| // each Chunk and request that it be scanned if reachable. |
| // (2) It roots a pointer to each Chunk in a global non-malloc |
| // VM region, making each Chunk appear reachable, and therefore |
| // ensuring that the leaks tool will scan it. (The leaks tool |
| // conservatively scans all writeable VM regions that are not malloc |
| // regions, and then scans malloc regions using the introspection API.) |
| // This prevents the leaks tool from reporting false positive leaks for |
| // objects pointed to from bmalloc memory -- though it also prevents the |
| // leaks tool from finding any leaks in bmalloc memory. |
| FixedVector<Range, capacity> m_ranges; |
| }; |
| |
| inline void Zone::addRange(Range range) |
| { |
| if (m_ranges.size() == m_ranges.capacity()) |
| return; |
| |
| m_ranges.push(range); |
| } |
| |
| } // namespace bmalloc |
| |
| #endif // Zone_h |