1    :  // Copyright 2012 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    :  #ifndef SYZYGY_REORDER_RANDOM_ORDER_GENERATOR_H_
  16    :  #define SYZYGY_REORDER_RANDOM_ORDER_GENERATOR_H_
  17    :  
  18    :  #include "syzygy/reorder/reorderer.h"
  19    :  
  20  m :  namespace reorder {
  21    :  
  22    :  // Orders blocks within sections using a pseudo-random shuffle.
  23  m :  class RandomOrderGenerator : public Reorderer::OrderGenerator {
  24  m :   public:
  25  m :    explicit RandomOrderGenerator(int seed);
  26  m :    virtual ~RandomOrderGenerator();
  27    :  
  28    :    // OrderGenerator implementation.
  29  m :    virtual bool OnCodeBlockEntry(const BlockGraph::Block* block,
  30  m :                                  RelativeAddress address,
  31  m :                                  uint32 process_id,
  32  m :                                  uint32 thread_id,
  33  m :                                  const UniqueTime& time) override;
  34  m :    virtual bool CalculateReordering(const PEFile& pe_file,
  35  m :                                     const ImageLayout& image,
  36  m :                                     bool reorder_code,
  37  m :                                     bool reorder_data,
  38  m :                                     Order* order) override;
  39    :  
  40  m :   private:
  41  m :    const uint32 seed_;
  42  m :  };
  43    :  
  44  m :  }  // namespace reorder
  45    :  
  46    :  #endif  // SYZYGY_REORDER_RANDOM_ORDER_GENERATOR_H_