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    :  // Internal implementation details for block.h. Not meant to be included
  16    :  // directly.
  17    :  
  18    :  #ifndef SYZYGY_AGENT_ASAN_BLOCK_IMPL_H_
  19    :  #define SYZYGY_AGENT_ASAN_BLOCK_IMPL_H_
  20    :  
  21  m :  namespace agent {
  22  m :  namespace asan {
  23    :  
  24    :  // Forward declaration.
  25  m :  struct BlockInfo;
  26    :  
  27    :  // A structure describing the layout of a block. This is largely implementation
  28    :  // detail, but exposed for unittesting. As far as the user is concerned this is
  29    :  // an opaque blob.
  30  m :  struct BlockLayout {
  31    :    // The alignment of the entire block.
  32  m :    size_t block_alignment;
  33    :    // The size of the entire block (the rest of the fields summed).
  34  m :    size_t block_size;
  35    :  
  36    :    // Left redzone.
  37  m :    size_t header_size;
  38  m :    size_t header_padding_size;
  39    :    // Body.
  40  m :    size_t body_size;
  41    :    // Right redzone.
  42  m :    size_t trailer_padding_size;
  43  m :    size_t trailer_size;
  44  m :  };
  45    :  
  46    :  // Identifies whole pages that are spanned by the redzones and body of the
  47    :  // given block. Directly sets the various *_pages* fields in @p block_info.
  48    :  // @param block_info The block information to be inspected and modified.
  49    :  // @note This is exposed as a convience function, but it is not meant to be
  50    :  //     directly called by the user.
  51  m :  void BlockIdentifyWholePages(BlockInfo* block_info);
  52    :  
  53  m :  }  // namespace asan
  54  m :  }  // namespace agent
  55    :  
  56    :  #endif  // SYZYGY_AGENT_ASAN_BLOCK_IMPL_H_