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- // Copyright (c) 2010 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- //
- // Unit tests for event trace provider.
- #include "base/win/event_trace_provider.h"
- #include <new>
- #include "testing/gtest/include/gtest/gtest.h"
- #include <initguid.h> // NOLINT - has to be last
- namespace {
- using base::win::EtwMofEvent;
- using base::win::EtwTraceProvider;
- // clang-format off
- // {7F0FD37F-FA3C-4cd6-9242-DF60967A2CB2}
- DEFINE_GUID(kTestProvider,
- 0x7f0fd37f, 0xfa3c, 0x4cd6, 0x92, 0x42, 0xdf, 0x60, 0x96, 0x7a, 0x2c, 0xb2);
- // clang-format on
- // clang-format off
- // {7F0FD37F-FA3C-4cd6-9242-DF60967A2CB2}
- DEFINE_GUID(kTestEventClass,
- 0x7f0fd37f, 0xfa3c, 0x4cd6, 0x92, 0x42, 0xdf, 0x60, 0x96, 0x7a, 0x2c, 0xb2);
- // clang-format on
- } // namespace
- TEST(EtwTraceProviderTest, ToleratesPreCreateInvocations) {
- // Because the trace provider is used in logging, it's important that
- // it be possible to use static provider instances without regard to
- // whether they've been constructed or destructed.
- // The interface of the class is designed to tolerate this usage.
- char buf[sizeof(EtwTraceProvider)] = {0};
- EtwTraceProvider& provider = reinterpret_cast<EtwTraceProvider&>(buf);
- EXPECT_EQ(0u, provider.registration_handle());
- EXPECT_EQ(0u, provider.session_handle());
- EXPECT_EQ(0u, provider.enable_flags());
- EXPECT_EQ(0u, provider.enable_level());
- EXPECT_FALSE(provider.ShouldLog(TRACE_LEVEL_FATAL, 0xfffffff));
- // We expect these not to crash.
- provider.Log(kTestEventClass, 0, TRACE_LEVEL_FATAL, "foo");
- provider.Log(kTestEventClass, 0, TRACE_LEVEL_FATAL, L"foo");
- EtwMofEvent<1> dummy(kTestEventClass, 0, TRACE_LEVEL_FATAL);
- DWORD data = 0;
- dummy.SetField(0, sizeof(data), &data);
- provider.Log(dummy.get());
- // Placement-new the provider into our buffer.
- new (buf) EtwTraceProvider(kTestProvider);
- // Registration is now safe.
- EXPECT_EQ(static_cast<ULONG>(ERROR_SUCCESS), provider.Register());
- // Destruct the instance, this should unregister it.
- provider.EtwTraceProvider::~EtwTraceProvider();
- // And post-destruction, all of the above should still be safe.
- EXPECT_EQ(0u, provider.registration_handle());
- EXPECT_EQ(0u, provider.session_handle());
- EXPECT_EQ(0u, provider.enable_flags());
- EXPECT_EQ(0u, provider.enable_level());
- EXPECT_FALSE(provider.ShouldLog(TRACE_LEVEL_FATAL, 0xfffffff));
- // We expect these not to crash.
- provider.Log(kTestEventClass, 0, TRACE_LEVEL_FATAL, "foo");
- provider.Log(kTestEventClass, 0, TRACE_LEVEL_FATAL, L"foo");
- provider.Log(dummy.get());
- }
- TEST(EtwTraceProviderTest, Initialize) {
- EtwTraceProvider provider(kTestProvider);
- EXPECT_EQ(0u, provider.registration_handle());
- EXPECT_EQ(0u, provider.session_handle());
- EXPECT_EQ(0u, provider.enable_flags());
- EXPECT_EQ(0u, provider.enable_level());
- }
- TEST(EtwTraceProviderTest, Register) {
- EtwTraceProvider provider(kTestProvider);
- ASSERT_EQ(static_cast<ULONG>(ERROR_SUCCESS), provider.Register());
- EXPECT_NE(0u, provider.registration_handle());
- ASSERT_EQ(static_cast<ULONG>(ERROR_SUCCESS), provider.Unregister());
- EXPECT_EQ(0u, provider.registration_handle());
- }
- TEST(EtwTraceProviderTest, RegisterWithNoNameFails) {
- EtwTraceProvider provider;
- EXPECT_TRUE(provider.Register() != ERROR_SUCCESS);
- }
- TEST(EtwTraceProviderTest, Enable) {
- EtwTraceProvider provider(kTestProvider);
- ASSERT_EQ(static_cast<ULONG>(ERROR_SUCCESS), provider.Register());
- EXPECT_NE(0u, provider.registration_handle());
- // No session so far.
- EXPECT_EQ(0u, provider.session_handle());
- EXPECT_EQ(0u, provider.enable_flags());
- EXPECT_EQ(0u, provider.enable_level());
- ASSERT_EQ(static_cast<ULONG>(ERROR_SUCCESS), provider.Unregister());
- EXPECT_EQ(0u, provider.registration_handle());
- }
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