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/file_util.h"
  18    :  #include "base/logging.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::InstrumentImpl() {
  33    :    entry_thunk_transform_.reset(
  34  E :        new instrument::transforms::EntryCallTransform(debug_friendly_));
  35  E :    entry_thunk_transform_->set_instrument_dll_name(agent_dll_);
  36  E :    relinker_->AppendTransform(entry_thunk_transform_.get());
  37    :  
  38    :    // If we are thunking imports then add the appropriate transform.
  39  E :    if (thunk_imports_) {
  40    :      import_thunk_tx_.reset(
  41  E :          new instrument::transforms::ThunkImportReferencesTransform);
  42    :      // Use the selected client DLL.
  43  E :      import_thunk_tx_->set_instrument_dll_name(agent_dll_);
  44  E :      relinker_->AppendTransform(import_thunk_tx_.get());
  45    :    }
  46    :  
  47  E :    return true;
  48  E :  }
  49    :  
  50    :  bool EntryCallInstrumenter::ParseAdditionalCommandLineArguments(
  51  E :      const CommandLine* command_line) {
  52  E :    thunk_imports_ = command_line->HasSwitch("instrument-imports");
  53    :  
  54  E :    return true;
  55  E :  }
  56    :  
  57  i :  const char* EntryCallInstrumenter::InstrumentationMode() {
  58  i :    return "profile";
  59  i :  }
  60    :  
  61    :  }  // namespace instrumenters
  62    :  }  // namespace instrument