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// Copyright 2010 The Chromium Authors
// 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 <initguid.h>
#include <new>
#include "testing/gtest/include/gtest/gtest.h"
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)] = {};
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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