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    :  // Unit-tests for the jump table count client.
  16    :  
  17    :  #include "syzygy/agent/jump_table_count/jump_table_count.h"
  18    :  
  19    :  #include "gmock/gmock.h"
  20    :  #include "gtest/gtest.h"
  21    :  
  22    :  namespace agent {
  23    :  namespace jump_table_count {
  24    :  
  25    :  namespace {
  26    :  
  27    :  const wchar_t kJumpTableCountClientDll[] = L"jump_table_count_client.dll";
  28    :  
  29    :  // The test fixture for the jump table count agent.
  30    :  class JumpTableCountTest : public testing::Test {
  31    :   public:
  32  E :    JumpTableCountTest()
  33    :        : agent_module_(NULL) { }
  34    :  
  35  E :    void LoadDll() {
  36  E :      ASSERT_EQ(NULL, agent_module_);
  37  E :      ASSERT_EQ(NULL, jump_table_case_counter_stub_);
  38  E :      ASSERT_EQ(NULL, ::GetModuleHandle(kJumpTableCountClientDll));
  39    :  
  40  E :      agent_module_ = ::LoadLibrary(kJumpTableCountClientDll);
  41  E :      ASSERT_TRUE(agent_module_ != NULL);
  42    :  
  43    :      jump_table_case_counter_stub_ =
  44  E :          ::GetProcAddress(agent_module_, "_jump_table_case_counter");
  45  E :      ASSERT_TRUE(jump_table_case_counter_stub_ != NULL);
  46    :  
  47    :      indirect_penter_dllmain_stub_ =
  48  E :          ::GetProcAddress(agent_module_, "_indirect_penter_dllmain");
  49  E :      ASSERT_TRUE(indirect_penter_dllmain_stub_ != NULL);
  50    :  
  51    :      indirect_penter_exemain_stub_ =
  52  E :          ::GetProcAddress(agent_module_, "_indirect_penter_exemain");
  53  E :      ASSERT_TRUE(indirect_penter_exemain_stub_ != NULL);
  54  E :    }
  55    :  
  56  E :    void UnloadDll() {
  57  E :      if (agent_module_ != NULL) {
  58  E :        ASSERT_TRUE(::FreeLibrary(agent_module_));
  59  E :        agent_module_ = NULL;
  60  E :        jump_table_case_counter_stub_ = NULL;
  61  E :        indirect_penter_dllmain_stub_ = NULL;
  62  E :        indirect_penter_exemain_stub_ = NULL;
  63    :      }
  64  E :    }
  65    :  
  66    :   protected:
  67    :    // The jump table count client module.
  68    :    HMODULE agent_module_;
  69    :  
  70    :    // The jump table case counter hook.
  71    :    static FARPROC jump_table_case_counter_stub_;
  72    :  
  73    :    // The DllMain entry stub.
  74    :    static FARPROC indirect_penter_dllmain_stub_;
  75    :  
  76    :    // The ExeMain entry stub.
  77    :    static FARPROC indirect_penter_exemain_stub_;
  78    :  };
  79    :  
  80    :  FARPROC JumpTableCountTest::jump_table_case_counter_stub_ = NULL;
  81    :  FARPROC JumpTableCountTest::indirect_penter_dllmain_stub_ = NULL;
  82    :  FARPROC JumpTableCountTest::indirect_penter_exemain_stub_ = NULL;
  83    :  
  84    :  }  // namespace
  85    :  
  86  E :  TEST_F(JumpTableCountTest, LoadUnload) {
  87  E :    ASSERT_NO_FATAL_FAILURE(LoadDll());
  88  E :    ASSERT_NO_FATAL_FAILURE(UnloadDll());
  89  E :  }
  90    :  
  91    :  }  // namespace jump_table_count
  92    :  }  // namespace agent