// Copyright (c) 2014 Marshall A. Greenblatt. Portions copyright (c) 2012 // Google Inc. All rights reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following disclaimer // in the documentation and/or other materials provided with the // distribution. // * Neither the name of Google Inc. nor the name Chromium Embedded // Framework nor the names of its contributors may be used to endorse // or promote products derived from this software without specific prior // written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. /// /// \file /// A bunch of macros for logging. /// /// NOTE: The contents of this file are only available to applications that link /// against the libcef_dll_wrapper target. /// /// WARNING: Logging macros should not be used in the main/browser process /// before calling CefInitialize or in sub-processes before calling /// CefExecuteProcess. /// /// INSTRUCTIONS: /// /// The way to log things is to stream things to LOG(). E.g., /// ///
///   LOG(INFO) << "Found " << num_cookies << " cookies";
/// 
/// /// You can also do conditional logging: /// ///
///   LOG_IF(INFO, num_cookies > 10) << "Got lots of cookies";
/// 
/// /// The CHECK(condition) macro is active in both debug and release builds and /// effectively performs a LOG(FATAL) which terminates the process and /// generates a crashdump unless a debugger is attached. /// /// There are also "debug mode" logging macros like the ones above: /// ///
///   DLOG(INFO) << "Found cookies";
///
///   DLOG_IF(INFO, num_cookies > 10) << "Got lots of cookies";
/// 
/// /// All "debug mode" logging is compiled away to nothing for non-debug mode /// compiles. LOG_IF and development flags also work well together /// because the code can be compiled away sometimes. /// /// We also have /// ///
///   LOG_ASSERT(assertion);
///   DLOG_ASSERT(assertion);
/// 
/// /// which is syntactic sugar for "{,D}LOG_IF(FATAL, assert fails) << assertion;" /// /// There are "verbose level" logging macros. They look like /// ///
///   VLOG(1) << "I'm printed when you run the program with --v=1 or more";
///   VLOG(2) << "I'm printed when you run the program with --v=2 or more";
/// 
/// /// These always log at the INFO log level (when they log at all). /// The verbose logging can also be turned on module-by-module. For instance, ///
///    --vmodule=profile=2,icon_loader=1,browser_*=3,*/chromeos/*=4 --v=0
/// 
/// will cause: /// 1. VLOG(2) and lower messages to be printed from profile.{h,cc} /// 2. VLOG(1) and lower messages to be printed from icon_loader.{h,cc} /// 3. VLOG(3) and lower messages to be printed from files prefixed with /// "browser" /// 4. VLOG(4) and lower messages to be printed from files under a /// "chromeos" directory. /// 5. VLOG(0) and lower messages to be printed from elsewhere /// /// The wildcarding functionality shown by (c) supports both '*' (match /// 0 or more characters) and '?' (match any single character) /// wildcards. Any pattern containing a forward or backward slash will /// be tested against the whole pathname and not just the module. /// E.g., "*/foo/bar/*=2" would change the logging level for all code /// in source files under a "foo/bar" directory. /// /// There's also VLOG_IS_ON(n) "verbose level" condition macro. To be used as /// ///
///   if (VLOG_IS_ON(2)) {
///     // do some logging preparation and logging
///     // that can't be accomplished with just VLOG(2) << ...;
///   }
/// 
/// /// There is also a VLOG_IF "verbose level" condition macro for sample /// cases, when some extra computation and preparation for logs is not /// needed. /// ///
///   VLOG_IF(1, (size > 1024))
///      << "I'm printed when size is more than 1024 and when you run the "
///         "program with --v=1 or more";
/// 
/// /// We also override the standard 'assert' to use 'DLOG_ASSERT'. /// /// Lastly, there is: /// ///
///   PLOG(ERROR) << "Couldn't do foo";
///   DPLOG(ERROR) << "Couldn't do foo";
///   PLOG_IF(ERROR, cond) << "Couldn't do foo";
///   DPLOG_IF(ERROR, cond) << "Couldn't do foo";
///   PCHECK(condition) << "Couldn't do foo";
///   DPCHECK(condition) << "Couldn't do foo";
/// 
/// /// which append the last system error to the message in string form (taken from /// GetLastError() on Windows and errno on POSIX). /// /// The supported severity levels for macros that allow you to specify one /// are (in increasing order of severity) INFO, WARNING, ERROR, and FATAL. /// /// Very important: logging a message at the FATAL severity level causes /// the program to terminate (after the message is logged). /// /// There is the special severity of DFATAL, which logs FATAL in debug mode, /// ERROR in normal mode. /// #ifndef CEF_INCLUDE_BASE_CEF_LOGGING_H_ #define CEF_INCLUDE_BASE_CEF_LOGGING_H_ #pragma once #if defined(USING_CHROMIUM_INCLUDES) // When building CEF include the Chromium header directly. #include "base/logging.h" #include "base/notreached.h" #elif defined(DCHECK) // Do nothing if the macros provided by this header already exist. // This can happen in cases where Chromium code is used directly by the // client application. When using Chromium code directly always include // the Chromium header first to avoid type conflicts. // Always define the DCHECK_IS_ON macro which is used from other CEF headers. #if defined(NDEBUG) && !defined(DCHECK_ALWAYS_ON) #define DCHECK_IS_ON() false #else #define DCHECK_IS_ON() true #endif #else // !defined(DCHECK) // The following is substantially similar to the Chromium implementation. // If the Chromium implementation diverges the below implementation should be // updated to match. #include #include #include #include #include "include/base/cef_build.h" #include "include/internal/cef_logging_internal.h" namespace cef { namespace logging { // Gets the current log level. inline int GetMinLogLevel() { return cef_get_min_log_level(); } // Gets the current vlog level for the given file (usually taken from // __FILE__). Note that |N| is the size *with* the null terminator. template int GetVlogLevel(const char (&file)[N]) { return cef_get_vlog_level(file, N); } typedef int LogSeverity; const LogSeverity LOG_VERBOSE = -1; // This is level 1 verbosity // Note: the log severities are used to index into the array of names, // see log_severity_names. const LogSeverity LOG_INFO = 0; const LogSeverity LOG_WARNING = 1; const LogSeverity LOG_ERROR = 2; const LogSeverity LOG_FATAL = 3; const LogSeverity LOG_NUM_SEVERITIES = 4; // LOG_DFATAL is LOG_FATAL in debug mode, ERROR in normal mode #ifdef NDEBUG const LogSeverity LOG_DFATAL = LOG_ERROR; #else const LogSeverity LOG_DFATAL = LOG_FATAL; #endif // A few definitions of macros that don't generate much code. These are used // by LOG() and LOG_IF, etc. Since these are used all over our code, it's // better to have compact code for these operations. #define COMPACT_GOOGLE_LOG_EX_INFO(ClassName, ...) \ ::cef::logging::ClassName(__FILE__, __LINE__, ::cef::logging::LOG_INFO, \ ##__VA_ARGS__) #define COMPACT_GOOGLE_LOG_EX_WARNING(ClassName, ...) \ ::cef::logging::ClassName(__FILE__, __LINE__, ::cef::logging::LOG_WARNING, \ ##__VA_ARGS__) #define COMPACT_GOOGLE_LOG_EX_ERROR(ClassName, ...) \ ::cef::logging::ClassName(__FILE__, __LINE__, ::cef::logging::LOG_ERROR, \ ##__VA_ARGS__) #define COMPACT_GOOGLE_LOG_EX_FATAL(ClassName, ...) \ ::cef::logging::ClassName(__FILE__, __LINE__, ::cef::logging::LOG_FATAL, \ ##__VA_ARGS__) #define COMPACT_GOOGLE_LOG_EX_DFATAL(ClassName, ...) \ ::cef::logging::ClassName(__FILE__, __LINE__, ::cef::logging::LOG_DFATAL, \ ##__VA_ARGS__) #define COMPACT_GOOGLE_LOG_INFO COMPACT_GOOGLE_LOG_EX_INFO(LogMessage) #define COMPACT_GOOGLE_LOG_WARNING COMPACT_GOOGLE_LOG_EX_WARNING(LogMessage) #define COMPACT_GOOGLE_LOG_ERROR COMPACT_GOOGLE_LOG_EX_ERROR(LogMessage) #define COMPACT_GOOGLE_LOG_FATAL COMPACT_GOOGLE_LOG_EX_FATAL(LogMessage) #define COMPACT_GOOGLE_LOG_DFATAL COMPACT_GOOGLE_LOG_EX_DFATAL(LogMessage) #if defined(OS_WIN) // wingdi.h defines ERROR to be 0. When we call LOG(ERROR), it gets // substituted with 0, and it expands to COMPACT_GOOGLE_LOG_0. To allow us // to keep using this syntax, we define this macro to do the same thing // as COMPACT_GOOGLE_LOG_ERROR, and also define ERROR the same way that // the Windows SDK does for consistency. #define ERROR 0 #define COMPACT_GOOGLE_LOG_EX_0(ClassName, ...) \ COMPACT_GOOGLE_LOG_EX_ERROR(ClassName, ##__VA_ARGS__) #define COMPACT_GOOGLE_LOG_0 COMPACT_GOOGLE_LOG_ERROR // Needed for LOG_IS_ON(ERROR). const LogSeverity LOG_0 = LOG_ERROR; #endif // As special cases, we can assume that LOG_IS_ON(FATAL) always holds. Also, // LOG_IS_ON(DFATAL) always holds in debug mode. In particular, CHECK()s will // always fire if they fail. #define LOG_IS_ON(severity) \ ((::cef::logging::LOG_##severity) >= ::cef::logging::GetMinLogLevel()) // We can't do any caching tricks with VLOG_IS_ON() like the // google-glog version since it requires GCC extensions. This means // that using the v-logging functions in conjunction with --vmodule // may be slow. #define VLOG_IS_ON(verboselevel) \ ((verboselevel) <= ::cef::logging::GetVlogLevel(__FILE__)) // Helper macro which avoids evaluating the arguments to a stream if // the condition doesn't hold. #define LAZY_STREAM(stream, condition) \ !(condition) ? (void)0 : ::cef::logging::LogMessageVoidify() & (stream) // We use the preprocessor's merging operator, "##", so that, e.g., // LOG(INFO) becomes the token COMPACT_GOOGLE_LOG_INFO. There's some funny // subtle difference between ostream member streaming functions (e.g., // ostream::operator<<(int) and ostream non-member streaming functions // (e.g., ::operator<<(ostream&, string&): it turns out that it's // impossible to stream something like a string directly to an unnamed // ostream. We employ a neat hack by calling the stream() member // function of LogMessage which seems to avoid the problem. #define LOG_STREAM(severity) COMPACT_GOOGLE_LOG_##severity.stream() #define LOG(severity) LAZY_STREAM(LOG_STREAM(severity), LOG_IS_ON(severity)) #define LOG_IF(severity, condition) \ LAZY_STREAM(LOG_STREAM(severity), LOG_IS_ON(severity) && (condition)) #define SYSLOG(severity) LOG(severity) #define SYSLOG_IF(severity, condition) LOG_IF(severity, condition) // The VLOG macros log with negative verbosities. #define VLOG_STREAM(verbose_level) \ cef::logging::LogMessage(__FILE__, __LINE__, -verbose_level).stream() #define VLOG(verbose_level) \ LAZY_STREAM(VLOG_STREAM(verbose_level), VLOG_IS_ON(verbose_level)) #define VLOG_IF(verbose_level, condition) \ LAZY_STREAM(VLOG_STREAM(verbose_level), \ VLOG_IS_ON(verbose_level) && (condition)) #if defined(OS_WIN) #define VPLOG_STREAM(verbose_level) \ cef::logging::Win32ErrorLogMessage(__FILE__, __LINE__, -verbose_level, \ ::cef::logging::GetLastSystemErrorCode()) \ .stream() #elif defined(OS_POSIX) #define VPLOG_STREAM(verbose_level) \ cef::logging::ErrnoLogMessage(__FILE__, __LINE__, -verbose_level, \ ::cef::logging::GetLastSystemErrorCode()) \ .stream() #endif #define VPLOG(verbose_level) \ LAZY_STREAM(VPLOG_STREAM(verbose_level), VLOG_IS_ON(verbose_level)) #define VPLOG_IF(verbose_level, condition) \ LAZY_STREAM(VPLOG_STREAM(verbose_level), \ VLOG_IS_ON(verbose_level) && (condition)) // TODO(akalin): Add more VLOG variants, e.g. VPLOG. #define LOG_ASSERT(condition) \ LOG_IF(FATAL, !(condition)) << "Assert failed: " #condition ". " #define SYSLOG_ASSERT(condition) \ SYSLOG_IF(FATAL, !(condition)) << "Assert failed: " #condition ". " #if defined(OS_WIN) #define PLOG_STREAM(severity) \ COMPACT_GOOGLE_LOG_EX_##severity(Win32ErrorLogMessage, \ ::cef::logging::GetLastSystemErrorCode()) \ .stream() #elif defined(OS_POSIX) #define PLOG_STREAM(severity) \ COMPACT_GOOGLE_LOG_EX_##severity(ErrnoLogMessage, \ ::cef::logging::GetLastSystemErrorCode()) \ .stream() #endif #define PLOG(severity) LAZY_STREAM(PLOG_STREAM(severity), LOG_IS_ON(severity)) #define PLOG_IF(severity, condition) \ LAZY_STREAM(PLOG_STREAM(severity), LOG_IS_ON(severity) && (condition)) // The actual stream used isn't important. #define EAT_STREAM_PARAMETERS \ true ? (void)0 : ::cef::logging::LogMessageVoidify() & LOG_STREAM(FATAL) // CHECK dies with a fatal error if condition is not true. It is *not* // controlled by NDEBUG, so the check will be executed regardless of // compilation mode. // // We make sure CHECK et al. always evaluates their arguments, as // doing CHECK(FunctionWithSideEffect()) is a common idiom. #define CHECK(condition) \ LAZY_STREAM(LOG_STREAM(FATAL), !(condition)) \ << "Check failed: " #condition ". " #define PCHECK(condition) \ LAZY_STREAM(PLOG_STREAM(FATAL), !(condition)) \ << "Check failed: " #condition ". " // Helper macro for binary operators. // Don't use this macro directly in your code, use CHECK_EQ et al below. // // TODO(akalin): Rewrite this so that constructs like if (...) // CHECK_EQ(...) else { ... } work properly. #define CHECK_OP(name, op, val1, val2) \ if (std::string* _result = cef::logging::Check##name##Impl( \ (val1), (val2), #val1 " " #op " " #val2)) \ cef::logging::LogMessage(__FILE__, __LINE__, _result).stream() // Build the error message string. This is separate from the "Impl" // function template because it is not performance critical and so can // be out of line, while the "Impl" code should be inline. Caller // takes ownership of the returned string. template std::string* MakeCheckOpString(const t1& v1, const t2& v2, const char* names) { std::ostringstream ss; ss << names << " (" << v1 << " vs. " << v2 << ")"; std::string* msg = new std::string(ss.str()); return msg; } // MSVC doesn't like complex extern templates and DLLs. #if !defined(COMPILER_MSVC) // Commonly used instantiations of MakeCheckOpString<>. Explicitly instantiated // in logging.cc. extern template std::string* MakeCheckOpString(const int&, const int&, const char* names); extern template std::string* MakeCheckOpString( const unsigned long&, const unsigned long&, const char* names); extern template std::string* MakeCheckOpString( const unsigned long&, const unsigned int&, const char* names); extern template std::string* MakeCheckOpString( const unsigned int&, const unsigned long&, const char* names); extern template std::string* MakeCheckOpString( const std::string&, const std::string&, const char* name); #endif // Helper functions for CHECK_OP macro. // The (int, int) specialization works around the issue that the compiler // will not instantiate the template version of the function on values of // unnamed enum type - see comment below. #define DEFINE_CHECK_OP_IMPL(name, op) \ template \ inline std::string* Check##name##Impl(const t1& v1, const t2& v2, \ const char* names) { \ if (v1 op v2) \ return NULL; \ else \ return MakeCheckOpString(v1, v2, names); \ } \ inline std::string* Check##name##Impl(int v1, int v2, const char* names) { \ if (v1 op v2) \ return NULL; \ else \ return MakeCheckOpString(v1, v2, names); \ } DEFINE_CHECK_OP_IMPL(EQ, ==) DEFINE_CHECK_OP_IMPL(NE, !=) DEFINE_CHECK_OP_IMPL(LE, <=) DEFINE_CHECK_OP_IMPL(LT, <) DEFINE_CHECK_OP_IMPL(GE, >=) DEFINE_CHECK_OP_IMPL(GT, >) #undef DEFINE_CHECK_OP_IMPL #define CHECK_EQ(val1, val2) CHECK_OP(EQ, ==, val1, val2) #define CHECK_NE(val1, val2) CHECK_OP(NE, !=, val1, val2) #define CHECK_LE(val1, val2) CHECK_OP(LE, <=, val1, val2) #define CHECK_LT(val1, val2) CHECK_OP(LT, <, val1, val2) #define CHECK_GE(val1, val2) CHECK_OP(GE, >=, val1, val2) #define CHECK_GT(val1, val2) CHECK_OP(GT, >, val1, val2) #if defined(NDEBUG) #define ENABLE_DLOG 0 #else #define ENABLE_DLOG 1 #endif #if defined(NDEBUG) && !defined(DCHECK_ALWAYS_ON) #define DCHECK_IS_ON() 0 #else #define DCHECK_IS_ON() 1 #endif // Definitions for DLOG et al. #if ENABLE_DLOG #define DLOG_IS_ON(severity) LOG_IS_ON(severity) #define DLOG_IF(severity, condition) LOG_IF(severity, condition) #define DLOG_ASSERT(condition) LOG_ASSERT(condition) #define DPLOG_IF(severity, condition) PLOG_IF(severity, condition) #define DVLOG_IF(verboselevel, condition) VLOG_IF(verboselevel, condition) #define DVPLOG_IF(verboselevel, condition) VPLOG_IF(verboselevel, condition) #else // ENABLE_DLOG // If ENABLE_DLOG is off, we want to avoid emitting any references to // |condition| (which may reference a variable defined only if NDEBUG // is not defined). Contrast this with DCHECK et al., which has // different behavior. #define DLOG_IS_ON(severity) false #define DLOG_IF(severity, condition) EAT_STREAM_PARAMETERS #define DLOG_ASSERT(condition) EAT_STREAM_PARAMETERS #define DPLOG_IF(severity, condition) EAT_STREAM_PARAMETERS #define DVLOG_IF(verboselevel, condition) EAT_STREAM_PARAMETERS #define DVPLOG_IF(verboselevel, condition) EAT_STREAM_PARAMETERS #endif // ENABLE_DLOG // DEBUG_MODE is for uses like // if (DEBUG_MODE) foo.CheckThatFoo(); // instead of // #ifndef NDEBUG // foo.CheckThatFoo(); // #endif // // We tie its state to ENABLE_DLOG. enum { DEBUG_MODE = ENABLE_DLOG }; #undef ENABLE_DLOG #define DLOG(severity) LAZY_STREAM(LOG_STREAM(severity), DLOG_IS_ON(severity)) #define DPLOG(severity) LAZY_STREAM(PLOG_STREAM(severity), DLOG_IS_ON(severity)) #define DVLOG(verboselevel) DVLOG_IF(verboselevel, VLOG_IS_ON(verboselevel)) #define DVPLOG(verboselevel) DVPLOG_IF(verboselevel, VLOG_IS_ON(verboselevel)) // Definitions for DCHECK et al. #if DCHECK_IS_ON() #define COMPACT_GOOGLE_LOG_EX_DCHECK(ClassName, ...) \ COMPACT_GOOGLE_LOG_EX_FATAL(ClassName, ##__VA_ARGS__) #define COMPACT_GOOGLE_LOG_DCHECK COMPACT_GOOGLE_LOG_FATAL const LogSeverity LOG_DCHECK = LOG_FATAL; #else // DCHECK_IS_ON() // These are just dummy values. #define COMPACT_GOOGLE_LOG_EX_DCHECK(ClassName, ...) \ COMPACT_GOOGLE_LOG_EX_INFO(ClassName, ##__VA_ARGS__) #define COMPACT_GOOGLE_LOG_DCHECK COMPACT_GOOGLE_LOG_INFO const LogSeverity LOG_DCHECK = LOG_INFO; #endif // DCHECK_IS_ON() // DCHECK et al. make sure to reference |condition| regardless of // whether DCHECKs are enabled; this is so that we don't get unused // variable warnings if the only use of a variable is in a DCHECK. // This behavior is different from DLOG_IF et al. #define DCHECK(condition) \ LAZY_STREAM(LOG_STREAM(DCHECK), DCHECK_IS_ON() && !(condition)) \ << "Check failed: " #condition ". " #define DPCHECK(condition) \ LAZY_STREAM(PLOG_STREAM(DCHECK), DCHECK_IS_ON() && !(condition)) \ << "Check failed: " #condition ". " // Helper macro for binary operators. // Don't use this macro directly in your code, use DCHECK_EQ et al below. #define DCHECK_OP(name, op, val1, val2) \ if (DCHECK_IS_ON()) \ if (std::string* _result = cef::logging::Check##name##Impl( \ (val1), (val2), #val1 " " #op " " #val2)) \ cef::logging::LogMessage(__FILE__, __LINE__, ::cef::logging::LOG_DCHECK, \ _result) \ .stream() // Equality/Inequality checks - compare two values, and log a // LOG_DCHECK message including the two values when the result is not // as expected. The values must have operator<<(ostream, ...) // defined. // // You may append to the error message like so: // DCHECK_NE(1, 2) << ": The world must be ending!"; // // We are very careful to ensure that each argument is evaluated exactly // once, and that anything which is legal to pass as a function argument is // legal here. In particular, the arguments may be temporary expressions // which will end up being destroyed at the end of the apparent statement, // for example: // DCHECK_EQ(string("abc")[1], 'b'); // // WARNING: These may not compile correctly if one of the arguments is a pointer // and the other is NULL. To work around this, simply static_cast NULL to the // type of the desired pointer. #define DCHECK_EQ(val1, val2) DCHECK_OP(EQ, ==, val1, val2) #define DCHECK_NE(val1, val2) DCHECK_OP(NE, !=, val1, val2) #define DCHECK_LE(val1, val2) DCHECK_OP(LE, <=, val1, val2) #define DCHECK_LT(val1, val2) DCHECK_OP(LT, <, val1, val2) #define DCHECK_GE(val1, val2) DCHECK_OP(GE, >=, val1, val2) #define DCHECK_GT(val1, val2) DCHECK_OP(GT, >, val1, val2) #define NOTREACHED() DCHECK(false) // Redefine the standard assert to use our nice log files #undef assert #define assert(x) DLOG_ASSERT(x) // This class more or less represents a particular log message. You // create an instance of LogMessage and then stream stuff to it. // When you finish streaming to it, ~LogMessage is called and the // full message gets streamed to the appropriate destination. // // You shouldn't actually use LogMessage's constructor to log things, // though. You should use the LOG() macro (and variants thereof) // above. class LogMessage { public: // Used for LOG(severity). LogMessage(const char* file, int line, LogSeverity severity); // Used for CHECK_EQ(), etc. Takes ownership of the given string. // Implied severity = LOG_FATAL. LogMessage(const char* file, int line, std::string* result); // Used for DCHECK_EQ(), etc. Takes ownership of the given string. LogMessage(const char* file, int line, LogSeverity severity, std::string* result); LogMessage(const LogMessage&) = delete; LogMessage& operator=(const LogMessage&) = delete; ~LogMessage(); std::ostream& stream() { return stream_; } private: LogSeverity severity_; std::ostringstream stream_; // The file and line information passed in to the constructor. const char* file_; const int line_; #if defined(OS_WIN) // Stores the current value of GetLastError in the constructor and restores // it in the destructor by calling SetLastError. // This is useful since the LogMessage class uses a lot of Win32 calls // that will lose the value of GLE and the code that called the log function // will have lost the thread error value when the log call returns. class SaveLastError { public: SaveLastError(); ~SaveLastError(); unsigned long get_error() const { return last_error_; } protected: unsigned long last_error_; }; SaveLastError last_error_; #endif }; // A non-macro interface to the log facility; (useful // when the logging level is not a compile-time constant). inline void LogAtLevel(int const log_level, std::string const& msg) { LogMessage(__FILE__, __LINE__, log_level).stream() << msg; } // This class is used to explicitly ignore values in the conditional // logging macros. This avoids compiler warnings like "value computed // is not used" and "statement has no effect". class LogMessageVoidify { public: LogMessageVoidify() {} // This has to be an operator with a precedence lower than << but // higher than ?: void operator&(std::ostream&) {} }; #if defined(OS_WIN) typedef unsigned long SystemErrorCode; #elif defined(OS_POSIX) typedef int SystemErrorCode; #endif // Alias for ::GetLastError() on Windows and errno on POSIX. Avoids having to // pull in windows.h just for GetLastError() and DWORD. SystemErrorCode GetLastSystemErrorCode(); std::string SystemErrorCodeToString(SystemErrorCode error_code); #if defined(OS_WIN) // Appends a formatted system message of the GetLastError() type. class Win32ErrorLogMessage { public: Win32ErrorLogMessage(const char* file, int line, LogSeverity severity, SystemErrorCode err); Win32ErrorLogMessage(const Win32ErrorLogMessage&) = delete; Win32ErrorLogMessage& operator=(const Win32ErrorLogMessage&) = delete; // Appends the error message before destructing the encapsulated class. ~Win32ErrorLogMessage(); std::ostream& stream() { return log_message_.stream(); } private: SystemErrorCode err_; LogMessage log_message_; }; #elif defined(OS_POSIX) // Appends a formatted system message of the errno type class ErrnoLogMessage { public: ErrnoLogMessage(const char* file, int line, LogSeverity severity, SystemErrorCode err); ErrnoLogMessage(const ErrnoLogMessage&) = delete; ErrnoLogMessage& operator=(const ErrnoLogMessage&) = delete; // Appends the error message before destructing the encapsulated class. ~ErrnoLogMessage(); std::ostream& stream() { return log_message_.stream(); } private: SystemErrorCode err_; LogMessage log_message_; }; #endif // OS_WIN } // namespace logging } // namespace cef // These functions are provided as a convenience for logging, which is where we // use streams (it is against Google style to use streams in other places). It // is designed to allow you to emit non-ASCII Unicode strings to the log file, // which is normally ASCII. It is relatively slow, so try not to use it for // common cases. Non-ASCII characters will be converted to UTF-8 by these // operators. std::ostream& operator<<(std::ostream& out, const wchar_t* wstr); inline std::ostream& operator<<(std::ostream& out, const std::wstring& wstr) { return out << wstr.c_str(); } // The NOTIMPLEMENTED() macro annotates codepaths which have // not been implemented yet. // // The implementation of this macro is controlled by NOTIMPLEMENTED_POLICY: // 0 -- Do nothing (stripped by compiler) // 1 -- Warn at compile time // 2 -- Fail at compile time // 3 -- Fail at runtime (DCHECK) // 4 -- [default] LOG(ERROR) at runtime // 5 -- LOG(ERROR) at runtime, only once per call-site #ifndef NOTIMPLEMENTED_POLICY #if defined(OS_ANDROID) && defined(OFFICIAL_BUILD) #define NOTIMPLEMENTED_POLICY 0 #else // Select default policy: LOG(ERROR) #define NOTIMPLEMENTED_POLICY 4 #endif #endif #if defined(COMPILER_GCC) // On Linux, with GCC, we can use __PRETTY_FUNCTION__ to get the demangled name // of the current function in the NOTIMPLEMENTED message. #define NOTIMPLEMENTED_MSG "Not implemented reached in " << __PRETTY_FUNCTION__ #else #define NOTIMPLEMENTED_MSG "NOT IMPLEMENTED" #endif #if NOTIMPLEMENTED_POLICY == 0 #define NOTIMPLEMENTED() EAT_STREAM_PARAMETERS #elif NOTIMPLEMENTED_POLICY == 1 // TODO, figure out how to generate a warning #define NOTIMPLEMENTED() COMPILE_ASSERT(false, NOT_IMPLEMENTED) #elif NOTIMPLEMENTED_POLICY == 2 #define NOTIMPLEMENTED() COMPILE_ASSERT(false, NOT_IMPLEMENTED) #elif NOTIMPLEMENTED_POLICY == 3 #define NOTIMPLEMENTED() NOTREACHED() #elif NOTIMPLEMENTED_POLICY == 4 #define NOTIMPLEMENTED() LOG(ERROR) << NOTIMPLEMENTED_MSG #elif NOTIMPLEMENTED_POLICY == 5 #define NOTIMPLEMENTED() \ do { \ static bool logged_once = false; \ LOG_IF(ERROR, !logged_once) << NOTIMPLEMENTED_MSG; \ logged_once = true; \ } while (0); \ EAT_STREAM_PARAMETERS #endif #endif // !USING_CHROMIUM_INCLUDES #endif // CEF_INCLUDE_BASE_CEF_LOGGING_H_