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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *  * Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  *  * Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in
     12  *    the documentation and/or other materials provided with the
     13  *    distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
     18  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
     19  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
     22  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     25  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #ifndef DEBUG_MALLOC_BACKTRACEDATA_H
     30 #define DEBUG_MALLOC_BACKTRACEDATA_H
     31 
     32 #include <stdint.h>
     33 
     34 #include <private/bionic_macros.h>
     35 
     36 // Forward declarations.
     37 struct Config;
     38 
     39 class BacktraceData {
     40  public:
     41   BacktraceData(const Config& config, size_t* offset);
     42   virtual ~BacktraceData() = default;
     43 
     44   bool Initialize(const Config& config);
     45 
     46   inline size_t alloc_offset() { return alloc_offset_; }
     47 
     48   bool enabled() { return enabled_; }
     49   void set_enabled(bool enabled) { enabled_ = enabled; }
     50 
     51  private:
     52   size_t alloc_offset_ = 0;
     53 
     54   volatile bool enabled_ = false;
     55 
     56   DISALLOW_COPY_AND_ASSIGN(BacktraceData);
     57 };
     58 
     59 #endif // DEBUG_MALLOC_BACKTRACEDATA_H
     60