| // Copyright 2012 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef BASE_LOGGING_WIN_H_ |
| #define BASE_LOGGING_WIN_H_ |
| |
| #include<stddef.h> |
| |
| #include<string> |
| |
| #include"base/base_export.h" |
| #include"base/logging.h" |
| #include"base/win/event_trace_provider.h" |
| |
| namespacebase{ |
| template<typenameType> |
| structStaticMemorySingletonTraits; |
| }// namespace base |
| |
| namespace logging{ |
| |
| // Event ID for the log messages we generate. |
| EXTERN_C BASE_EXPORTconst GUID kLogEventId; |
| |
| // Feature enable mask for LogEventProvider. |
| enumLogEnableMask{ |
| // If this bit is set in our provider enable mask, we will include |
| // a stack trace with every log message. |
| ENABLE_STACK_TRACE_CAPTURE=0x0001, |
| // If this bit is set in our provider enable mask, the provider will log |
| // a LOG message with only the textual content of the message, and no |
| // stack trace. |
| ENABLE_LOG_MESSAGE_ONLY=0x0002, |
| }; |
| |
| // The message types our log event provider generates. |
| // ETW likes user message types to start at 10. |
| enumLogMessageTypes{ |
| // A textual only log message, contains a zero-terminated string. |
| LOG_MESSAGE=10, |
| // A message with a stack trace, followed by the zero-terminated |
| // message text. |
| LOG_MESSAGE_WITH_STACKTRACE=11, |
| // A message with: |
| // a stack trace, |
| // the line number as a four byte integer, |
| // the file as a zero terminated UTF8 string, |
| // the zero-terminated UTF8 message text. |
| LOG_MESSAGE_FULL=12, |
| }; |
| |
| // Trace provider class to drive log control and transport |
| // with Event Tracing for Windows. |
| class BASE_EXPORTLogEventProvider:publicbase::win::EtwTraceProvider{ |
| public: |
| LogEventProvider(constLogEventProvider&)=delete; |
| LogEventProvider&operator=(constLogEventProvider&)=delete; |
| staticLogEventProvider*GetInstance(); |
| |
| staticboolLogMessage(logging::LogSeverity severity, |
| constchar* file, |
| int line, |
| size_t message_start, |
| const std::string& str); |
| |
| staticvoidInitialize(const GUID& provider_name); |
| staticvoidUninitialize(); |
| |
| protected: |
| // Overridden to manipulate the log level on ETW control callbacks. |
| voidOnEventsEnabled()override; |
| voidOnEventsDisabled()override; |
| |
| private: |
| LogEventProvider(); |
| |
| // The log severity prior to OnEventsEnabled, |
| // restored in OnEventsDisabled. |
| logging::LogSeverity old_log_level_; |
| |
| friendstructbase::StaticMemorySingletonTraits<LogEventProvider>; |
| }; |
| |
| }// namespace logging |
| |
| #endif// BASE_LOGGING_WIN_H_ |
