base/win/event_trace_controller_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4 //
   5 // Unit tests for event trace controller.
   6
   7 #include <objbase.h>
   8 #include <initguid.h>
   9
  10 #include "base/files/file_path.h"
  11 #include "base/files/file_util.h"
  12 #include "base/files/scoped_temp_dir.h"
  13 #include "base/logging.h"
  14 #include "base/process/process_handle.h"
  15 #include "base/strings/stringprintf.h"
  16 #include "base/sys_info.h"
  17 #include "base/win/event_trace_controller.h"
  18 #include "base/win/event_trace_provider.h"
  19 #include "base/win/scoped_handle.h"
  20 #include "testing/gtest/include/gtest/gtest.h"
  21
  22 namespace base {
  23 namespace win {
  24
  25 namespace {
  26
  27 DEFINE_GUID(kGuidNull,
  28     0x0000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0);
  29
  30 const ULONG kTestProviderFlags = 0xCAFEBABE;
  31
  32 class TestingProvider: public EtwTraceProvider {
  33  public:
  34   explicit TestingProvider(const GUID& provider_name)
  35       : EtwTraceProvider(provider_name) {
  36     callback_event_.Set(::CreateEvent(NULL, TRUE, FALSE, NULL));
  37   }
  38
  39   void WaitForCallback() {
  40     ::WaitForSingleObject(callback_event_.Get(), INFINITE);
  41     ::ResetEvent(callback_event_.Get());
  42   }
  43
  44  private:
  45   void OnEventsEnabled() override { ::SetEvent(callback_event_.Get()); }
  46   void PostEventsDisabled() override { ::SetEvent(callback_event_.Get()); }
  47
  48   ScopedHandle callback_event_;
  49
  50   DISALLOW_COPY_AND_ASSIGN(TestingProvider);
  51 };
  52
  53 }  // namespace
  54
  55 TEST(EtwTracePropertiesTest, Initialization) {
  56   EtwTraceProperties prop;
  57
  58   EVENT_TRACE_PROPERTIES* p = prop.get();
  59   EXPECT_NE(0u, p->Wnode.BufferSize);
  60   EXPECT_EQ(0u, p->Wnode.ProviderId);
  61   EXPECT_EQ(0u, p->Wnode.HistoricalContext);
  62
  63   EXPECT_TRUE(kGuidNull == p->Wnode.Guid);
  64   EXPECT_EQ(0, p->Wnode.ClientContext);
  65   EXPECT_EQ(WNODE_FLAG_TRACED_GUID, p->Wnode.Flags);
  66
  67   EXPECT_EQ(0, p->BufferSize);
  68   EXPECT_EQ(0, p->MinimumBuffers);
  69   EXPECT_EQ(0, p->MaximumBuffers);
  70   EXPECT_EQ(0, p->MaximumFileSize);
  71   EXPECT_EQ(0, p->LogFileMode);
  72   EXPECT_EQ(0, p->FlushTimer);
  73   EXPECT_EQ(0, p->EnableFlags);
  74   EXPECT_EQ(0, p->AgeLimit);
  75
  76   EXPECT_EQ(0, p->NumberOfBuffers);
  77   EXPECT_EQ(0, p->FreeBuffers);
  78   EXPECT_EQ(0, p->EventsLost);
  79   EXPECT_EQ(0, p->BuffersWritten);
  80   EXPECT_EQ(0, p->LogBuffersLost);
  81   EXPECT_EQ(0, p->RealTimeBuffersLost);
  82   EXPECT_EQ(0, p->LoggerThreadId);
  83   EXPECT_NE(0u, p->LogFileNameOffset);
  84   EXPECT_NE(0u, p->LoggerNameOffset);
  85 }
  86
  87 TEST(EtwTracePropertiesTest, Strings) {
  88   EtwTraceProperties prop;
  89
  90   ASSERT_STREQ(L"", prop.GetLoggerFileName());
  91   ASSERT_STREQ(L"", prop.GetLoggerName());
  92
  93   std::wstring name(1023, L'A');
  94   ASSERT_HRESULT_SUCCEEDED(prop.SetLoggerFileName(name.c_str()));
  95   ASSERT_HRESULT_SUCCEEDED(prop.SetLoggerName(name.c_str()));
  96   ASSERT_STREQ(name.c_str(), prop.GetLoggerFileName());
  97   ASSERT_STREQ(name.c_str(), prop.GetLoggerName());
  98
  99   std::wstring name2(1024, L'A');
 100   ASSERT_HRESULT_FAILED(prop.SetLoggerFileName(name2.c_str()));
 101   ASSERT_HRESULT_FAILED(prop.SetLoggerName(name2.c_str()));
 102 }
 103
 104 namespace {
 105
 106 class EtwTraceControllerTest : public testing::Test {
 107  public:
 108   EtwTraceControllerTest()
 109       : session_name_(StringPrintf(L"TestSession-%d", GetCurrentProcId())) {
 110   }
 111
 112   void SetUp() override {
 113     EtwTraceProperties ignore;
 114     EtwTraceController::Stop(session_name_.c_str(), &ignore);
 115
 116     // Allocate a new provider name GUID for each test.
 117     ASSERT_HRESULT_SUCCEEDED(::CoCreateGuid(&test_provider_));
 118   }
 119
 120   void TearDown() override {
 121     EtwTraceProperties prop;
 122     EtwTraceController::Stop(session_name_.c_str(), &prop);
 123   }
 124
 125  protected:
 126   GUID test_provider_;
 127   std::wstring session_name_;
 128 };
 129
 130 }  // namespace
 131
 132 TEST_F(EtwTraceControllerTest, Initialize) {
 133   EtwTraceController controller;
 134
 135   EXPECT_EQ(NULL, controller.session());
 136   EXPECT_STREQ(L"", controller.session_name());
 137 }
 138
 139
 140 TEST_F(EtwTraceControllerTest, StartRealTimeSession) {
 141   EtwTraceController controller;
 142
 143   HRESULT hr = controller.StartRealtimeSession(session_name_.c_str(),
 144                                                100 * 1024);
 145   if (hr == E_ACCESSDENIED) {
 146     VLOG(1) << "You must be an administrator to run this test on Vista";
 147     return;
 148   }
 149
 150   EXPECT_TRUE(NULL != controller.session());
 151   EXPECT_STREQ(session_name_.c_str(), controller.session_name());
 152
 153   EXPECT_HRESULT_SUCCEEDED(controller.Stop(NULL));
 154   EXPECT_EQ(NULL, controller.session());
 155   EXPECT_STREQ(L"", controller.session_name());
 156 }
 157
 158 TEST_F(EtwTraceControllerTest, StartFileSession) {
 159   ScopedTempDir temp_dir;
 160   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 161   FilePath temp;
 162   ASSERT_TRUE(base::CreateTemporaryFileInDir(temp_dir.path(), &temp));
 163
 164   EtwTraceController controller;
 165   HRESULT hr = controller.StartFileSession(session_name_.c_str(),
 166                                            temp.value().c_str());
 167   if (hr == E_ACCESSDENIED) {
 168     VLOG(1) << "You must be an administrator to run this test on Vista";
 169     base::DeleteFile(temp, false);
 170     return;
 171   }
 172
 173   EXPECT_TRUE(NULL != controller.session());
 174   EXPECT_STREQ(session_name_.c_str(), controller.session_name());
 175
 176   EXPECT_HRESULT_SUCCEEDED(controller.Stop(NULL));
 177   EXPECT_EQ(NULL, controller.session());
 178   EXPECT_STREQ(L"", controller.session_name());
 179   base::DeleteFile(temp, false);
 180 }
 181
 182 TEST_F(EtwTraceControllerTest, EnableDisable) {
 183   TestingProvider provider(test_provider_);
 184
 185   EXPECT_EQ(ERROR_SUCCESS, provider.Register());
 186   EXPECT_EQ(NULL, provider.session_handle());
 187
 188   EtwTraceController controller;
 189   HRESULT hr = controller.StartRealtimeSession(session_name_.c_str(),
 190                                                100 * 1024);
 191   if (hr == E_ACCESSDENIED) {
 192     VLOG(1) << "You must be an administrator to run this test on Vista";
 193     return;
 194   }
 195
 196   EXPECT_HRESULT_SUCCEEDED(controller.EnableProvider(test_provider_,
 197                            TRACE_LEVEL_VERBOSE, kTestProviderFlags));
 198
 199   provider.WaitForCallback();
 200
 201   EXPECT_EQ(TRACE_LEVEL_VERBOSE, provider.enable_level());
 202   EXPECT_EQ(kTestProviderFlags, provider.enable_flags());
 203
 204   EXPECT_HRESULT_SUCCEEDED(controller.DisableProvider(test_provider_));
 205
 206   provider.WaitForCallback();
 207
 208   EXPECT_EQ(0, provider.enable_level());
 209   EXPECT_EQ(0, provider.enable_flags());
 210
 211   EXPECT_EQ(ERROR_SUCCESS, provider.Unregister());
 212
 213   // Enable the provider again, before registering.
 214   EXPECT_HRESULT_SUCCEEDED(controller.EnableProvider(test_provider_,
 215                            TRACE_LEVEL_VERBOSE, kTestProviderFlags));
 216
 217   // Register the provider again, the settings above
 218   // should take immediate effect.
 219   EXPECT_EQ(ERROR_SUCCESS, provider.Register());
 220
 221   EXPECT_EQ(TRACE_LEVEL_VERBOSE, provider.enable_level());
 222   EXPECT_EQ(kTestProviderFlags, provider.enable_flags());
 223
 224   EXPECT_HRESULT_SUCCEEDED(controller.Stop(NULL));
 225
 226   provider.WaitForCallback();
 227
 228   // Session should have wound down.
 229   EXPECT_EQ(0, provider.enable_level());
 230   EXPECT_EQ(0, provider.enable_flags());
 231 }
 232
 233 }  // namespace win
 234 }  // namespace base