1    :  // Copyright 2013 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    :  #include "syzygy/instrument/instrumenters/entry_call_instrumenter.h"
  16    :  
  17    :  #include "base/logging.h"
  18    :  #include "base/files/file_util.h"
  19    :  #include "syzygy/application/application.h"
  20    :  #include "syzygy/pe/image_filter.h"
  21    :  
  22    :  namespace instrument {
  23    :  namespace instrumenters {
  24    :  
  25    :  const char EntryCallInstrumenter::kAgentDllProfile[] = "profile_client.dll";
  26    :  
  27    :  EntryCallInstrumenter::EntryCallInstrumenter()
  28  E :      : thunk_imports_(false) {
  29  E :    agent_dll_ = kAgentDllProfile;
  30  E :  }
  31    :  
  32  E :  bool EntryCallInstrumenter::InstrumentPrepare() {
  33  E :    return true;
  34  E :  }
  35    :  
  36  E :  bool EntryCallInstrumenter::InstrumentImpl() {
  37    :    entry_thunk_transform_.reset(
  38  E :        new instrument::transforms::EntryCallTransform(debug_friendly_));
  39  E :    entry_thunk_transform_->set_instrument_dll_name(agent_dll_);
  40  E :    relinker_->AppendTransform(entry_thunk_transform_.get());
  41    :  
  42    :    // If we are thunking imports then add the appropriate transform.
  43  E :    if (thunk_imports_) {
  44    :      import_thunk_tx_.reset(
  45  E :          new instrument::transforms::ThunkImportReferencesTransform);
  46    :      // Use the selected client DLL.
  47  E :      import_thunk_tx_->set_instrument_dll_name(agent_dll_);
  48  E :      relinker_->AppendTransform(import_thunk_tx_.get());
  49    :    }
  50    :  
  51  E :    return true;
  52  E :  }
  53    :  
  54    :  bool EntryCallInstrumenter::DoCommandLineParse(
  55  E :      const base::CommandLine* command_line) {
  56  E :    if (!Super::DoCommandLineParse(command_line))
  57  i :      return false;
  58    :  
  59  E :    thunk_imports_ = command_line->HasSwitch("instrument-imports");
  60    :  
  61  E :    return true;
  62  E :  }
  63    :  
  64  i :  const char* EntryCallInstrumenter::InstrumentationMode() {
  65  i :    return "profile";
  66  i :  }
  67    :  
  68    :  }  // namespace instrumenters
  69    :  }  // namespace instrument