1    :  // Copyright 2012 Google Inc.
   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    :  #include "syzygy/instrument/mutators/add_bb_ranges_stream.h"
  16    :  
  17    :  #include "syzygy/common/basic_block_frequency_data.h"
  18    :  #include "syzygy/pdb/pdb_byte_stream.h"
  19    :  
  20    :  namespace instrument {
  21    :  namespace mutators {
  22    :  
  23    :  const char AddBasicBlockRangesStreamPdbMutator::kMutatorName[] =
  24    :      "AddBasicBlockRangesStreamPdbMutator";
  25    :  
  26    :  bool AddBasicBlockRangesStreamPdbMutator::AddNamedStreams(
  27  E :      const pdb::PdbFile& pdb_file) {
  28  E :    if (bb_ranges_.size() == 0) {
  29  E :      LOG(INFO) << "Basic-block addresses vector is empty. Not adding stream.";
  30  E :      return true;
  31    :    }
  32    :  
  33    :    // Create the stream.
  34  E :    scoped_refptr<pdb::PdbByteStream> stream(new pdb::PdbByteStream);
  35    :    CHECK(stream->Init(reinterpret_cast<const uint8*>(&bb_ranges_.at(0)),
  36  E :                       bb_ranges_.size() * sizeof(bb_ranges_.at(0))));
  37    :  
  38    :    // Add the stream to the PDB.
  39  E :    if (!SetNamedStream(common::kBasicBlockRangesStreamName, stream.get())) {
  40    :      // This should not happen, as it indicates we are trying to doubly
  41    :      // instrument a given binary.
  42  E :      LOG(ERROR) << "Basic-block ranges stream already exists.";
  43  E :      return false;
  44    :    }
  45    :  
  46  E :    return true;
  47  E :  }
  48    :  
  49    :  }  // namespace mutators
  50    :  }  // namespace instrument