1    :  // Copyright 2014 Google Inc. All Rights Reserved.
   2    :  //
   3    :  // Licensed under the Apache License, Version 2.0 (the "License");
   4    :  // you may not use this file except in compliance with the License.
   5    :  // You may obtain a copy of the License at
   6    :  //
   7    :  //     http://www.apache.org/licenses/LICENSE-2.0
   8    :  //
   9    :  // Unless required by applicable law or agreed to in writing, software
  10    :  // distributed under the License is distributed on an "AS IS" BASIS,
  11    :  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12    :  // See the License for the specific language governing permissions and
  13    :  // limitations under the License.
  14    :  //
  15    :  // An implementation of HeapInterface that wraps the CtMalloc heap.
  16    :  
  17    :  #ifndef SYZYGY_AGENT_ASAN_HEAPS_CTMALLOC_HEAP_H_
  18    :  #define SYZYGY_AGENT_ASAN_HEAPS_CTMALLOC_HEAP_H_
  19    :  
  20    :  #include "base/logging.h"
  21    :  #include "base/memory/scoped_ptr.h"
  22    :  #include "syzygy/agent/asan/heap.h"
  23    :  #include "syzygy/agent/asan/memory_notifier.h"
  24    :  #include "syzygy/common/recursive_lock.h"
  25    :  #include "wtf/config.h"
  26    :  #include "wtf/PartitionAlloc.h"
  27    :  
  28  m :  namespace agent {
  29  m :  namespace asan {
  30  m :  namespace heaps {
  31    :  
  32  m :  class CtMallocHeap : public HeapInterface {
  33  m :   public:
  34    :    // Constructor. Creates a heap that is owned uniquely by this object.
  35    :    // @param memory_notifier The notifier that will be used to inform the
  36    :    //     runtime of this heaps internal memory use.
  37  m :    explicit CtMallocHeap(MemoryNotifierInterface* memory_notifier);
  38    :  
  39    :    // Destructor.
  40  m :    virtual ~CtMallocHeap();
  41    :  
  42    :    // @name HeapInterface functions.
  43    :    // @{
  44  m :    virtual HeapType GetHeapType() const;
  45  m :    virtual uint32 GetHeapFeatures() const;
  46  m :    virtual void* Allocate(size_t bytes);
  47  m :    virtual bool Free(void* alloc);
  48  m :    virtual bool IsAllocated(const void* alloc);
  49  m :    virtual size_t GetAllocationSize(const void* alloc);
  50  m :    virtual void Lock();
  51  m :    virtual void Unlock();
  52  m :    virtual bool TryLock();
  53    :    // @}
  54    :  
  55  m :   protected:
  56    :    // The underlying heap. Under lock_.
  57  m :    PartitionAllocatorGeneric allocator_;
  58    :  
  59    :    // The interface that will be notified of internal memory use. Has its own
  60    :    // locking.
  61  m :    MemoryNotifierInterface* memory_notifier_;
  62    :  
  63    :    // The lock that gates access to this heap.
  64  m :    ::common::RecursiveLock lock_;
  65    :  
  66  m :   private:
  67  m :    DISALLOW_COPY_AND_ASSIGN(CtMallocHeap);
  68  m :  };
  69    :  
  70  m :  }  // namespace heaps
  71  m :  }  // namespace asan
  72  m :  }  // namespace agent
  73    :  
  74    :  #endif  // SYZYGY_AGENT_ASAN_HEAPS_CTMALLOC_HEAP_H_