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    :  // Declares the entry thunk instrumenter.
  16    :  #ifndef SYZYGY_INSTRUMENT_INSTRUMENTERS_ENTRY_THUNK_INSTRUMENTER_H_
  17    :  #define SYZYGY_INSTRUMENT_INSTRUMENTERS_ENTRY_THUNK_INSTRUMENTER_H_
  18    :  
  19    :  #include <string>
  20    :  
  21    :  #include "base/command_line.h"
  22    :  #include "syzygy/instrument/instrumenters/instrumenter_with_agent.h"
  23    :  #include "syzygy/instrument/transforms/entry_thunk_transform.h"
  24    :  #include "syzygy/instrument/transforms/thunk_import_references_transform.h"
  25    :  #include "syzygy/pe/pe_relinker.h"
  26    :  
  27    :  namespace instrument {
  28    :  namespace instrumenters {
  29    :  
  30    :  class EntryThunkInstrumenter : public InstrumenterWithAgent {
  31    :   public:
  32    :    typedef InstrumenterWithAgent Super;
  33    :  
  34    :    // The mode for this instrumenter.
  35    :    enum Mode {
  36    :      INVALID_MODE,
  37    :      CALL_TRACE,
  38    :      PROFILE,
  39    :    };
  40    :  
  41    :    explicit EntryThunkInstrumenter(Mode instrumentation_mode);
  42  E :    ~EntryThunkInstrumenter() { }
  43    :  
  44    :    // Returns the instrumentation mode.
  45  E :    Mode instrumentation_mode() { return instrumentation_mode_; }
  46    :  
  47    :   protected:
  48    :    // The name of the agents for the different mode of instrumentation.
  49    :    static const char kAgentDllProfile[];
  50    :    static const char kAgentDllRpc[];
  51    :  
  52    :    // @name InstrumenterWithAgent overrides.
  53    :    // @{
  54    :    bool InstrumentPrepare() override;
  55    :    bool InstrumentImpl() override;
  56    :    const char* InstrumentationMode() override;
  57    :    // @}
  58    :  
  59    :    // @name Super overrides.
  60    :    // @{
  61    :    bool DoCommandLineParse(const base::CommandLine* command_line) override;
  62    :    // @}
  63    :  
  64    :    // @name Command-line parameters.
  65    :    // @{
  66    :    bool instrument_unsafe_references_;
  67    :    bool module_entry_only_;
  68    :    bool thunk_imports_;
  69    :    // @}
  70    :  
  71    :    // The instrumentation mode.
  72    :    Mode instrumentation_mode_;
  73    :  
  74    :    // The transforms for this agent.
  75    :    scoped_ptr<instrument::transforms::EntryThunkTransform>
  76    :        entry_thunk_transform_;
  77    :    scoped_ptr<instrument::transforms::ThunkImportReferencesTransform>
  78    :        import_thunk_tx_;
  79    :  };
  80    :  
  81    :  }  // namespace instrumenters
  82    :  }  // namespace instrument
  83    :  
  84    :  #endif  // SYZYGY_INSTRUMENT_INSTRUMENTERS_ENTRY_THUNK_INSTRUMENTER_H_