// Copyright (c) 2012 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. #include "base/logging.h" #include #include #include "base/macros.h" #include "build/build_config.h" #if defined(OS_WIN) #include #include #include "base/files/file_path.h" #include "base/files/file_util.h" typedef HANDLE FileHandle; typedef HANDLE MutexHandle; // Windows warns on using write(). It prefers _write(). #define write(fd, buf, count) _write(fd, buf, static_cast(count)) // Windows doesn't define STDERR_FILENO. Define it here. #define STDERR_FILENO 2 #elif defined(OS_MACOSX) #include #include #include #include #include #elif defined(OS_POSIX) #if defined(OS_NACL) #include // timespec doesn't seem to be in #else #include #endif #include #endif #if defined(OS_POSIX) #include #include #include #include #include #include #include #include #define MAX_PATH PATH_MAX typedef FILE* FileHandle; typedef pthread_mutex_t* MutexHandle; #endif #include #include #include #include #include #include #include #include "base/base_switches.h" #include "base/command_line.h" #include "base/debug/alias.h" #include "base/debug/debugger.h" #include "base/debug/stack_trace.h" #include "base/files/file_path.h" #include "base/posix/eintr_wrapper.h" #include "base/strings/string_piece.h" #include "base/strings/string_util.h" #include "base/strings/stringprintf.h" #include "base/strings/sys_string_conversions.h" #include "base/strings/utf_string_conversions.h" #include "base/synchronization/lock_impl.h" #include "base/threading/platform_thread.h" #include "base/vlog.h" #if defined(OS_POSIX) #include "base/posix/safe_strerror.h" #endif #if defined(OS_ANDROID) || defined(__ANDROID__) #include #endif namespace logging { namespace { VlogInfo* g_vlog_info = nullptr; VlogInfo* g_vlog_info_prev = nullptr; const char* const log_severity_names[LOG_NUM_SEVERITIES] = { "INFO", "WARNING", "ERROR", "FATAL" }; const char* log_severity_name(int severity) { if (severity >= 0 && severity < LOG_NUM_SEVERITIES) return log_severity_names[severity]; return "UNKNOWN"; } int g_min_log_level = 0; LoggingDestination g_logging_destination = LOG_DEFAULT; // For LOG_ERROR and above, always print to stderr. const int kAlwaysPrintErrorLevel = LOG_ERROR; // Which log file to use? This is initialized by InitLogging or // will be lazily initialized to the default value when it is // first needed. #if defined(OS_WIN) typedef std::wstring PathString; #else typedef std::string PathString; #endif PathString* g_log_file_name = nullptr; // This file is lazily opened and the handle may be nullptr FileHandle g_log_file = nullptr; // What should be prepended to each message? bool g_log_process_id = false; bool g_log_thread_id = false; bool g_log_timestamp = true; bool g_log_tickcount = false; // Should we pop up fatal debug messages in a dialog? bool show_error_dialogs = false; // An assert handler override specified by the client to be called instead of // the debug message dialog and process termination. LogAssertHandlerFunction log_assert_handler = nullptr; // A log message handler that gets notified of every log message we process. LogMessageHandlerFunction log_message_handler = nullptr; // Helper functions to wrap platform differences. int32_t CurrentProcessId() { #if defined(OS_WIN) return GetCurrentProcessId(); #elif defined(OS_POSIX) return getpid(); #endif } uint64_t TickCount() { #if defined(OS_WIN) return GetTickCount(); #elif defined(OS_MACOSX) return mach_absolute_time(); #elif defined(OS_NACL) // NaCl sadly does not have _POSIX_TIMERS enabled in sys/features.h // So we have to use clock() for now. return clock(); #elif defined(OS_POSIX) struct timespec ts; clock_gettime(CLOCK_MONOTONIC, &ts); uint64_t absolute_micro = static_cast(ts.tv_sec) * 1000000 + static_cast(ts.tv_nsec) / 1000; return absolute_micro; #endif } void DeleteFilePath(const PathString& log_name) { #if defined(OS_WIN) DeleteFile(log_name.c_str()); #elif defined(OS_NACL) // Do nothing; unlink() isn't supported on NaCl. #else unlink(log_name.c_str()); #endif } PathString GetDefaultLogFile() { #if defined(OS_WIN) // On Windows we use the same path as the exe. wchar_t module_name[MAX_PATH]; GetModuleFileName(nullptr, module_name, MAX_PATH); PathString log_name = module_name; PathString::size_type last_backslash = log_name.rfind('\\', log_name.size()); if (last_backslash != PathString::npos) log_name.erase(last_backslash + 1); log_name += L"debug.log"; return log_name; #elif defined(OS_POSIX) // On other platforms we just use the current directory. return PathString("debug.log"); #endif } // We don't need locks on Windows for atomically appending to files. The OS // provides this functionality. #if !defined(OS_WIN) // This class acts as a wrapper for locking the logging files. // LoggingLock::Init() should be called from the main thread before any logging // is done. Then whenever logging, be sure to have a local LoggingLock // instance on the stack. This will ensure that the lock is unlocked upon // exiting the frame. // LoggingLocks can not be nested. class LoggingLock { public: LoggingLock() { LockLogging(); } ~LoggingLock() { UnlockLogging(); } static void Init(LogLockingState lock_log, const PathChar* /* new_log_file */) { if (initialized) return; lock_log_file = lock_log; if (lock_log_file != LOCK_LOG_FILE) log_lock = new base::internal::LockImpl(); initialized = true; } private: static void LockLogging() { if (lock_log_file == LOCK_LOG_FILE) { #if defined(OS_POSIX) pthread_mutex_lock(&log_mutex); #endif } else { // use the lock log_lock->Lock(); } } static void UnlockLogging() { if (lock_log_file == LOCK_LOG_FILE) { #if defined(OS_POSIX) pthread_mutex_unlock(&log_mutex); #endif } else { log_lock->Unlock(); } } // The lock is used if log file locking is false. It helps us avoid problems // with multiple threads writing to the log file at the same time. Use // LockImpl directly instead of using Lock, because Lock makes logging calls. static base::internal::LockImpl* log_lock; // When we don't use a lock, we are using a global mutex. We need to do this // because LockFileEx is not thread safe. #if defined(OS_POSIX) static pthread_mutex_t log_mutex; #endif static bool initialized; static LogLockingState lock_log_file; }; // static bool LoggingLock::initialized = false; // static base::internal::LockImpl* LoggingLock::log_lock = nullptr; // static LogLockingState LoggingLock::lock_log_file = LOCK_LOG_FILE; #if defined(OS_POSIX) pthread_mutex_t LoggingLock::log_mutex = PTHREAD_MUTEX_INITIALIZER; #endif #endif // OS_WIN // Called by logging functions to ensure that |g_log_file| is initialized // and can be used for writing. Returns false if the file could not be // initialized. |g_log_file| will be nullptr in this case. bool InitializeLogFileHandle() { if (g_log_file) return true; if (!g_log_file_name) { // Nobody has called InitLogging to specify a debug log file, so here we // initialize the log file name to a default. g_log_file_name = new PathString(GetDefaultLogFile()); } if ((g_logging_destination & LOG_TO_FILE) != 0) { #if defined(OS_WIN) // The FILE_APPEND_DATA access mask ensures that the file is atomically // appended to across accesses from multiple threads. // https://msdn.microsoft.com/en-us/library/windows/desktop/aa364399(v=vs.85).aspx // https://msdn.microsoft.com/en-us/library/windows/desktop/aa363858(v=vs.85).aspx g_log_file = CreateFile(g_log_file_name->c_str(), FILE_APPEND_DATA, FILE_SHARE_READ | FILE_SHARE_WRITE, nullptr, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, nullptr); if (g_log_file == INVALID_HANDLE_VALUE || g_log_file == nullptr) { // try the current directory base::FilePath file_path; if (!base::GetCurrentDirectory(&file_path)) return false; *g_log_file_name = file_path.Append( FILE_PATH_LITERAL("debug.log")).value(); g_log_file = CreateFile(g_log_file_name->c_str(), FILE_APPEND_DATA, FILE_SHARE_READ | FILE_SHARE_WRITE, nullptr, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, nullptr); if (g_log_file == INVALID_HANDLE_VALUE || g_log_file == nullptr) { g_log_file = nullptr; return false; } } #elif defined(OS_POSIX) g_log_file = fopen(g_log_file_name->c_str(), "a"); if (g_log_file == nullptr) return false; #endif } return true; } void CloseFile(FileHandle log) { #if defined(OS_WIN) CloseHandle(log); #else fclose(log); #endif } void CloseLogFileUnlocked() { if (!g_log_file) return; CloseFile(g_log_file); g_log_file = nullptr; } } // namespace LoggingSettings::LoggingSettings() : logging_dest(LOG_DEFAULT), log_file(nullptr), lock_log(LOCK_LOG_FILE), delete_old(APPEND_TO_OLD_LOG_FILE) {} bool BaseInitLoggingImpl(const LoggingSettings& settings) { #if defined(OS_NACL) // Can log only to the system debug log. CHECK_EQ(settings.logging_dest & ~LOG_TO_SYSTEM_DEBUG_LOG, 0); #endif if (base::CommandLine::InitializedForCurrentProcess()) { base::CommandLine* command_line = base::CommandLine::ForCurrentProcess(); // Don't bother initializing |g_vlog_info| unless we use one of the // vlog switches. if (command_line->HasSwitch(switches::kV) || command_line->HasSwitch(switches::kVModule)) { // NOTE: If |g_vlog_info| has already been initialized, it might be in use // by another thread. Don't delete the old VLogInfo, just create a second // one. We keep track of both to avoid memory leak warnings. CHECK(!g_vlog_info_prev); g_vlog_info_prev = g_vlog_info; g_vlog_info = new VlogInfo(command_line->GetSwitchValueASCII(switches::kV), command_line->GetSwitchValueASCII(switches::kVModule), &g_min_log_level); } } g_logging_destination = settings.logging_dest; // ignore file options unless logging to file is set. if ((g_logging_destination & LOG_TO_FILE) == 0) return true; #if !defined(OS_WIN) LoggingLock::Init(settings.lock_log, settings.log_file); LoggingLock logging_lock; #endif // Calling InitLogging twice or after some log call has already opened the // default log file will re-initialize to the new options. CloseLogFileUnlocked(); if (!g_log_file_name) g_log_file_name = new PathString(); *g_log_file_name = settings.log_file; if (settings.delete_old == DELETE_OLD_LOG_FILE) DeleteFilePath(*g_log_file_name); return InitializeLogFileHandle(); } void SetMinLogLevel(int level) { g_min_log_level = std::min(LOG_FATAL, level); } int GetMinLogLevel() { return g_min_log_level; } bool ShouldCreateLogMessage(int severity) { if (severity < g_min_log_level) return false; // Return true here unless we know ~LogMessage won't do anything. Note that // ~LogMessage writes to stderr if severity_ >= kAlwaysPrintErrorLevel, even // when g_logging_destination is LOG_NONE. return g_logging_destination != LOG_NONE || log_message_handler || severity >= kAlwaysPrintErrorLevel; } int GetVlogVerbosity() { return std::max(-1, LOG_INFO - GetMinLogLevel()); } int GetVlogLevelHelper(const char* file, size_t N) { DCHECK_GT(N, 0U); // Note: |g_vlog_info| may change on a different thread during startup // (but will always be valid or nullptr). VlogInfo* vlog_info = g_vlog_info; return vlog_info ? vlog_info->GetVlogLevel(base::StringPiece(file, N - 1)) : GetVlogVerbosity(); } void SetLogItems(bool enable_process_id, bool enable_thread_id, bool enable_timestamp, bool enable_tickcount) { g_log_process_id = enable_process_id; g_log_thread_id = enable_thread_id; g_log_timestamp = enable_timestamp; g_log_tickcount = enable_tickcount; } void SetShowErrorDialogs(bool enable_dialogs) { show_error_dialogs = enable_dialogs; } void SetLogAssertHandler(LogAssertHandlerFunction handler) { log_assert_handler = handler; } void SetLogMessageHandler(LogMessageHandlerFunction handler) { log_message_handler = handler; } LogMessageHandlerFunction GetLogMessageHandler() { return log_message_handler; } // Explicit instantiations for commonly used comparisons. template std::string* MakeCheckOpString( const int&, const int&, const char* names); template std::string* MakeCheckOpString( const unsigned long&, const unsigned long&, const char* names); template std::string* MakeCheckOpString( const unsigned long&, const unsigned int&, const char* names); template std::string* MakeCheckOpString( const unsigned int&, const unsigned long&, const char* names); template std::string* MakeCheckOpString( const std::string&, const std::string&, const char* name); #if !defined(NDEBUG) // Displays a message box to the user with the error message in it. // Used for fatal messages, where we close the app simultaneously. // This is for developers only; we don't use this in circumstances // (like release builds) where users could see it, since users don't // understand these messages anyway. void DisplayDebugMessageInDialog(const std::string& str) { if (str.empty()) return; if (!show_error_dialogs) return; #if defined(OS_WIN) MessageBoxW(nullptr, base::UTF8ToUTF16(str).c_str(), L"Fatal error", MB_OK | MB_ICONHAND | MB_TOPMOST); #else // We intentionally don't implement a dialog on other platforms. // You can just look at stderr. #endif // defined(OS_WIN) } #endif // !defined(NDEBUG) #if defined(OS_WIN) LogMessage::SaveLastError::SaveLastError() : last_error_(::GetLastError()) { } LogMessage::SaveLastError::~SaveLastError() { ::SetLastError(last_error_); } #endif // defined(OS_WIN) LogMessage::LogMessage(const char* file, int line, LogSeverity severity) : severity_(severity), file_(file), line_(line) { Init(file, line); } LogMessage::LogMessage(const char* file, int line, const char* condition) : severity_(LOG_FATAL), file_(file), line_(line) { Init(file, line); stream_ << "Check failed: " << condition << ". "; } LogMessage::LogMessage(const char* file, int line, std::string* result) : severity_(LOG_FATAL), file_(file), line_(line) { Init(file, line); stream_ << "Check failed: " << *result; delete result; } LogMessage::LogMessage(const char* file, int line, LogSeverity severity, std::string* result) : severity_(severity), file_(file), line_(line) { Init(file, line); stream_ << "Check failed: " << *result; delete result; } LogMessage::~LogMessage() { #if !defined(OFFICIAL_BUILD) && !defined(OS_NACL) && !defined(__UCLIBC__) if (severity_ == LOG_FATAL && !base::debug::BeingDebugged()) { // Include a stack trace on a fatal, unless a debugger is attached. base::debug::StackTrace trace; stream_ << std::endl; // Newline to separate from log message. trace.OutputToStream(&stream_); } #endif stream_ << std::endl; std::string str_newline(stream_.str()); // Give any log message handler first dibs on the message. if (log_message_handler && log_message_handler(severity_, file_, line_, message_start_, str_newline)) { // The handler took care of it, no further processing. return; } if ((g_logging_destination & LOG_TO_SYSTEM_DEBUG_LOG) != 0) { #if defined(OS_WIN) OutputDebugStringA(str_newline.c_str()); #elif defined(OS_MACOSX) // In LOG_TO_SYSTEM_DEBUG_LOG mode, log messages are always written to // stderr. If stderr is /dev/null, also log via ASL (Apple System Log). If // there's something weird about stderr, assume that log messages are going // nowhere and log via ASL too. Messages logged via ASL show up in // Console.app. // // Programs started by launchd, as UI applications normally are, have had // stderr connected to /dev/null since OS X 10.8. Prior to that, stderr was // a pipe to launchd, which logged what it received (see log_redirect_fd in // 10.7.5 launchd-392.39/launchd/src/launchd_core_logic.c). // // Another alternative would be to determine whether stderr is a pipe to // launchd and avoid logging via ASL only in that case. See 10.7.5 // CF-635.21/CFUtilities.c also_do_stderr(). This would result in logging to // both stderr and ASL even in tests, where it's undesirable to log to the // system log at all. // // Note that the ASL client by default discards messages whose levels are // below ASL_LEVEL_NOTICE. It's possible to change that with // asl_set_filter(), but this is pointless because syslogd normally applies // the same filter. const bool log_via_asl = []() { struct stat stderr_stat; if (fstat(fileno(stderr), &stderr_stat) == -1) { return true; } if (!S_ISCHR(stderr_stat.st_mode)) { return false; } struct stat dev_null_stat; if (stat(_PATH_DEVNULL, &dev_null_stat) == -1) { return true; } return !S_ISCHR(dev_null_stat.st_mode) || stderr_stat.st_rdev == dev_null_stat.st_rdev; }(); if (log_via_asl) { // Log roughly the same way that CFLog() and NSLog() would. See 10.10.5 // CF-1153.18/CFUtilities.c __CFLogCString(). // // The ASL facility is set to the main bundle ID if available. Otherwise, // "com.apple.console" is used. CFBundleRef main_bundle = CFBundleGetMainBundle(); CFStringRef main_bundle_id_cf = main_bundle ? CFBundleGetIdentifier(main_bundle) : nullptr; std::string asl_facility = main_bundle_id_cf ? base::SysCFStringRefToUTF8(main_bundle_id_cf) : std::string("com.apple.console"); class ASLClient { public: explicit ASLClient(const std::string& asl_facility) : client_(asl_open(nullptr, asl_facility.c_str(), ASL_OPT_NO_DELAY)) {} ~ASLClient() { asl_close(client_); } aslclient get() const { return client_; } private: aslclient client_; DISALLOW_COPY_AND_ASSIGN(ASLClient); } asl_client(asl_facility); class ASLMessage { public: ASLMessage() : message_(asl_new(ASL_TYPE_MSG)) {} ~ASLMessage() { asl_free(message_); } aslmsg get() const { return message_; } private: aslmsg message_; DISALLOW_COPY_AND_ASSIGN(ASLMessage); } asl_message; // By default, messages are only readable by the admin group. Explicitly // make them readable by the user generating the messages. char euid_string[12]; snprintf(euid_string, arraysize(euid_string), "%d", geteuid()); asl_set(asl_message.get(), ASL_KEY_READ_UID, euid_string); // Map Chrome log severities to ASL log levels. const char* const asl_level_string = [](LogSeverity severity) { // ASL_LEVEL_* are ints, but ASL needs equivalent strings. This // non-obvious two-step macro trick achieves what's needed. // https://gcc.gnu.org/onlinedocs/cpp/Stringification.html #define ASL_LEVEL_STR(level) ASL_LEVEL_STR_X(level) #define ASL_LEVEL_STR_X(level) #level switch (severity) { case LOG_INFO: return ASL_LEVEL_STR(ASL_LEVEL_INFO); case LOG_WARNING: return ASL_LEVEL_STR(ASL_LEVEL_WARNING); case LOG_ERROR: return ASL_LEVEL_STR(ASL_LEVEL_ERR); case LOG_FATAL: return ASL_LEVEL_STR(ASL_LEVEL_CRIT); default: return severity < 0 ? ASL_LEVEL_STR(ASL_LEVEL_DEBUG) : ASL_LEVEL_STR(ASL_LEVEL_NOTICE); } #undef ASL_LEVEL_STR #undef ASL_LEVEL_STR_X }(severity_); asl_set(asl_message.get(), ASL_KEY_LEVEL, asl_level_string); asl_set(asl_message.get(), ASL_KEY_MSG, str_newline.c_str()); asl_send(asl_client.get(), asl_message.get()); } #elif defined(OS_ANDROID) || defined(__ANDROID__) android_LogPriority priority = (severity_ < 0) ? ANDROID_LOG_VERBOSE : ANDROID_LOG_UNKNOWN; switch (severity_) { case LOG_INFO: priority = ANDROID_LOG_INFO; break; case LOG_WARNING: priority = ANDROID_LOG_WARN; break; case LOG_ERROR: priority = ANDROID_LOG_ERROR; break; case LOG_FATAL: priority = ANDROID_LOG_FATAL; break; } #if defined(OS_ANDROID) __android_log_write(priority, "chromium", str_newline.c_str()); #else __android_log_write( priority, base::CommandLine::InitializedForCurrentProcess() ? base::CommandLine::ForCurrentProcess()-> GetProgram().BaseName().value().c_str() : nullptr, str_newline.c_str()); #endif // defined(OS_ANDROID) #endif ignore_result(fwrite(str_newline.data(), str_newline.size(), 1, stderr)); fflush(stderr); } else if (severity_ >= kAlwaysPrintErrorLevel) { // When we're only outputting to a log file, above a certain log level, we // should still output to stderr so that we can better detect and diagnose // problems with unit tests, especially on the buildbots. ignore_result(fwrite(str_newline.data(), str_newline.size(), 1, stderr)); fflush(stderr); } // write to log file if ((g_logging_destination & LOG_TO_FILE) != 0) { // We can have multiple threads and/or processes, so try to prevent them // from clobbering each other's writes. // If the client app did not call InitLogging, and the lock has not // been created do it now. We do this on demand, but if two threads try // to do this at the same time, there will be a race condition to create // the lock. This is why InitLogging should be called from the main // thread at the beginning of execution. #if !defined(OS_WIN) LoggingLock::Init(LOCK_LOG_FILE, nullptr); LoggingLock logging_lock; #endif if (InitializeLogFileHandle()) { #if defined(OS_WIN) DWORD num_written; WriteFile(g_log_file, static_cast(str_newline.c_str()), static_cast(str_newline.length()), &num_written, nullptr); #else ignore_result(fwrite( str_newline.data(), str_newline.size(), 1, g_log_file)); fflush(g_log_file); #endif } } if (severity_ == LOG_FATAL) { // Ensure the first characters of the string are on the stack so they // are contained in minidumps for diagnostic purposes. char str_stack[1024]; str_newline.copy(str_stack, arraysize(str_stack)); base::debug::Alias(str_stack); if (log_assert_handler) { // Make a copy of the string for the handler out of paranoia. log_assert_handler(std::string(stream_.str())); } else { // Don't use the string with the newline, get a fresh version to send to // the debug message process. We also don't display assertions to the // user in release mode. The enduser can't do anything with this // information, and displaying message boxes when the application is // hosed can cause additional problems. #ifndef NDEBUG if (!base::debug::BeingDebugged()) { // Displaying a dialog is unnecessary when debugging and can complicate // debugging. DisplayDebugMessageInDialog(stream_.str()); } #endif // Crash the process to generate a dump. base::debug::BreakDebugger(); } } } // writes the common header info to the stream void LogMessage::Init(const char* file, int line) { base::StringPiece filename(file); size_t last_slash_pos = filename.find_last_of("\\/"); if (last_slash_pos != base::StringPiece::npos) filename.remove_prefix(last_slash_pos + 1); // TODO(darin): It might be nice if the columns were fixed width. stream_ << '['; if (g_log_process_id) stream_ << CurrentProcessId() << ':'; if (g_log_thread_id) stream_ << base::PlatformThread::CurrentId() << ':'; if (g_log_timestamp) { time_t t = time(nullptr); struct tm local_time; memset(&local_time, 0, sizeof(local_time)); #ifdef _MSC_VER localtime_s(&local_time, &t); #else localtime_r(&t, &local_time); #endif struct tm* tm_time = &local_time; stream_ << std::setfill('0') << std::setw(2) << 1 + tm_time->tm_mon << std::setw(2) << tm_time->tm_mday << '/' << std::setw(2) << tm_time->tm_hour << std::setw(2) << tm_time->tm_min << std::setw(2) << tm_time->tm_sec << ':'; } if (g_log_tickcount) stream_ << TickCount() << ':'; if (severity_ >= 0) stream_ << log_severity_name(severity_); else stream_ << "VERBOSE" << -severity_; stream_ << ":" << filename << "(" << line << ")] "; message_start_ = stream_.str().length(); } #if defined(OS_WIN) // This has already been defined in the header, but defining it again as DWORD // ensures that the type used in the header is equivalent to DWORD. If not, // the redefinition is a compile error. typedef DWORD SystemErrorCode; #endif SystemErrorCode GetLastSystemErrorCode() { #if defined(OS_WIN) return ::GetLastError(); #elif defined(OS_POSIX) return errno; #else #error Not implemented #endif } #if defined(OS_WIN) BASE_EXPORT std::string SystemErrorCodeToString(SystemErrorCode error_code) { const int kErrorMessageBufferSize = 256; char msgbuf[kErrorMessageBufferSize]; DWORD flags = FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS; DWORD len = FormatMessageA(flags, nullptr, error_code, 0, msgbuf, arraysize(msgbuf), nullptr); if (len) { // Messages returned by system end with line breaks. return base::CollapseWhitespaceASCII(msgbuf, true) + base::StringPrintf(" (0x%X)", error_code); } return base::StringPrintf("Error (0x%X) while retrieving error. (0x%X)", GetLastError(), error_code); } #elif defined(OS_POSIX) BASE_EXPORT std::string SystemErrorCodeToString(SystemErrorCode error_code) { return base::safe_strerror(error_code); } #else #error Not implemented #endif // defined(OS_WIN) #if defined(OS_WIN) Win32ErrorLogMessage::Win32ErrorLogMessage(const char* file, int line, LogSeverity severity, SystemErrorCode err) : err_(err), log_message_(file, line, severity) { } Win32ErrorLogMessage::~Win32ErrorLogMessage() { stream() << ": " << SystemErrorCodeToString(err_); // We're about to crash (CHECK). Put |err_| on the stack (by placing it in a // field) and use Alias in hopes that it makes it into crash dumps. DWORD last_error = err_; base::debug::Alias(&last_error); } #elif defined(OS_POSIX) ErrnoLogMessage::ErrnoLogMessage(const char* file, int line, LogSeverity severity, SystemErrorCode err) : err_(err), log_message_(file, line, severity) { } ErrnoLogMessage::~ErrnoLogMessage() { stream() << ": " << SystemErrorCodeToString(err_); } #endif // defined(OS_WIN) void CloseLogFile() { #if !defined(OS_WIN) LoggingLock logging_lock; #endif CloseLogFileUnlocked(); } void RawLog(int level, const char* message) { if (level >= g_min_log_level) { size_t bytes_written = 0; const size_t message_len = strlen(message); int rv; while (bytes_written < message_len) { rv = HANDLE_EINTR( write(STDERR_FILENO, message + bytes_written, message_len - bytes_written)); if (rv < 0) { // Give up, nothing we can do now. break; } bytes_written += rv; } if (message_len > 0 && message[message_len - 1] != '\n') { do { rv = HANDLE_EINTR(write(STDERR_FILENO, "\n", 1)); if (rv < 0) { // Give up, nothing we can do now. break; } } while (rv != 1); } } if (level == LOG_FATAL) base::debug::BreakDebugger(); } // This was defined at the beginning of this file. #undef write #if defined(OS_WIN) bool IsLoggingToFileEnabled() { return g_logging_destination & LOG_TO_FILE; } std::wstring GetLogFileFullPath() { if (g_log_file_name) return *g_log_file_name; return std::wstring(); } #endif BASE_EXPORT void LogErrorNotReached(const char* file, int line) { LogMessage(file, line, LOG_ERROR).stream() << "NOTREACHED() hit."; } } // namespace logging std::ostream& std::operator<<(std::ostream& out, const wchar_t* wstr) { return out << base::WideToUTF8(wstr); }