logging.h revision a1401311d1ab56c4ed0a474bd38c108f75cb0cd9
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef BASE_LOGGING_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define BASE_LOGGING_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <cassert> 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <string> 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <cstring> 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <sstream> 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/base_export.h" 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/basictypes.h" 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/debug/debugger.h" 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "build/build_config.h" 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Optional message capabilities 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ----------------------------- 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Assertion failed messages and fatal errors are displayed in a dialog box 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// before the application exits. However, running this UI creates a message 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// loop, which causes application messages to be processed and potentially 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// dispatched to existing application windows. Since the application is in a 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// bad state when this assertion dialog is displayed, these messages may not 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// get processed and hang the dialog, or the application might go crazy. 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Therefore, it can be beneficial to display the error dialog in a separate 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// process from the main application. When the logging system needs to display 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// a fatal error dialog box, it will look for a program called 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// "DebugMessage.exe" in the same directory as the application executable. It 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// will run this application with the message as the command line, and will 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// not include the name of the application as is traditional for easier 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// parsing. 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The code for DebugMessage.exe is only one line. In WinMain, do: 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// MessageBox(NULL, GetCommandLineW(), L"Fatal Error", 0); 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// If DebugMessage.exe is not found, the logging code will use a normal 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// MessageBox, potentially causing the problems discussed above. 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Instructions 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ------------ 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Make a bunch of macros for logging. The way to log things is to stream 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// things to LOG(<a particular severity level>). E.g., 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// LOG(INFO) << "Found " << num_cookies << " cookies"; 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// You can also do conditional logging: 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// LOG_IF(INFO, num_cookies > 10) << "Got lots of cookies"; 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The CHECK(condition) macro is active in both debug and release builds and 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// effectively performs a LOG(FATAL) which terminates the process and 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// generates a crashdump unless a debugger is attached. 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// There are also "debug mode" logging macros like the ones above: 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// DLOG(INFO) << "Found cookies"; 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// DLOG_IF(INFO, num_cookies > 10) << "Got lots of cookies"; 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// All "debug mode" logging is compiled away to nothing for non-debug mode 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// compiles. LOG_IF and development flags also work well together 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// because the code can be compiled away sometimes. 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// We also have 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// LOG_ASSERT(assertion); 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// DLOG_ASSERT(assertion); 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// which is syntactic sugar for {,D}LOG_IF(FATAL, assert fails) << assertion; 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// There are "verbose level" logging macros. They look like 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// VLOG(1) << "I'm printed when you run the program with --v=1 or more"; 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// VLOG(2) << "I'm printed when you run the program with --v=2 or more"; 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// These always log at the INFO log level (when they log at all). 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The verbose logging can also be turned on module-by-module. For instance, 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// --vmodule=profile=2,icon_loader=1,browser_*=3,*/chromeos/*=4 --v=0 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// will cause: 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// a. VLOG(2) and lower messages to be printed from profile.{h,cc} 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// b. VLOG(1) and lower messages to be printed from icon_loader.{h,cc} 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// c. VLOG(3) and lower messages to be printed from files prefixed with 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// "browser" 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// d. VLOG(4) and lower messages to be printed from files under a 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// "chromeos" directory. 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// e. VLOG(0) and lower messages to be printed from elsewhere 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The wildcarding functionality shown by (c) supports both '*' (match 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 0 or more characters) and '?' (match any single character) 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// wildcards. Any pattern containing a forward or backward slash will 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// be tested against the whole pathname and not just the module. 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// E.g., "*/foo/bar/*=2" would change the logging level for all code 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// in source files under a "foo/bar" directory. 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// There's also VLOG_IS_ON(n) "verbose level" condition macro. To be used as 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// if (VLOG_IS_ON(2)) { 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// // do some logging preparation and logging 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// // that can't be accomplished with just VLOG(2) << ...; 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// } 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// There is also a VLOG_IF "verbose level" condition macro for sample 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// cases, when some extra computation and preparation for logs is not 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// needed. 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// VLOG_IF(1, (size > 1024)) 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// << "I'm printed when size is more than 1024 and when you run the " 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// "program with --v=1 or more"; 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// We also override the standard 'assert' to use 'DLOG_ASSERT'. 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Lastly, there is: 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// PLOG(ERROR) << "Couldn't do foo"; 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// DPLOG(ERROR) << "Couldn't do foo"; 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// PLOG_IF(ERROR, cond) << "Couldn't do foo"; 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// DPLOG_IF(ERROR, cond) << "Couldn't do foo"; 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// PCHECK(condition) << "Couldn't do foo"; 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// DPCHECK(condition) << "Couldn't do foo"; 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// which append the last system error to the message in string form (taken from 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// GetLastError() on Windows and errno on POSIX). 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The supported severity levels for macros that allow you to specify one 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// are (in increasing order of severity) INFO, WARNING, ERROR, ERROR_REPORT, 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// and FATAL. 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Very important: logging a message at the FATAL severity level causes 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// the program to terminate (after the message is logged). 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Note the special severity of ERROR_REPORT only available/relevant in normal 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// mode, which displays error dialog without terminating the program. There is 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// no error dialog for severity ERROR or below in normal mode. 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// There is also the special severity of DFATAL, which logs FATAL in 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// debug mode, ERROR in normal mode. 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace logging { 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// TODO(avi): do we want to do a unification of character types here? 146eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#if defined(OS_WIN) 147eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdochtypedef wchar_t PathChar; 148eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#else 149eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdochtypedef char PathChar; 150eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#endif 151eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 152eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// Where to record logging output? A flat file and/or system debug log 153eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// via OutputDebugString. 154eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdochenum LoggingDestination { 155eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch LOG_NONE = 0, 156eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch LOG_TO_FILE = 1 << 0, 157eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch LOG_TO_SYSTEM_DEBUG_LOG = 1 << 1, 158eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 159eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch LOG_TO_ALL = LOG_TO_FILE | LOG_TO_SYSTEM_DEBUG_LOG, 160eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 161eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch // On Windows, use a file next to the exe; on POSIX platforms, where 162eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch // it may not even be possible to locate the executable on disk, use 163eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch // stderr. 164eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#if defined(OS_WIN) 165eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch LOG_DEFAULT = LOG_TO_FILE, 166eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#elif defined(OS_POSIX) 167eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch LOG_DEFAULT = LOG_TO_SYSTEM_DEBUG_LOG, 168eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#endif 169eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch}; 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Indicates that the log file should be locked when being written to. 172eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// Unless there is only one single-threaded process that is logging to 173eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// the log file, the file should be locked during writes to make each 174a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// log output atomic. Other writers will block. 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// All processes writing to the log file must have their locking set for it to 177eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// work properly. Defaults to LOCK_LOG_FILE. 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)enum LogLockingState { LOCK_LOG_FILE, DONT_LOCK_LOG_FILE }; 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// On startup, should we delete or append to an existing log file (if any)? 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Defaults to APPEND_TO_OLD_LOG_FILE. 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)enum OldFileDeletionState { DELETE_OLD_LOG_FILE, APPEND_TO_OLD_LOG_FILE }; 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 184eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdochstruct BASE_EXPORT LoggingSettings { 185eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch // The defaults values are: 186eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch // 187eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch // logging_dest: LOG_DEFAULT 188eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch // log_file: NULL 189eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch // lock_log: LOCK_LOG_FILE 190eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch // delete_old: APPEND_TO_OLD_LOG_FILE 191eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch LoggingSettings(); 192eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 193eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch LoggingDestination logging_dest; 194eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 195eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch // The three settings below have an effect only when LOG_TO_FILE is 196eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch // set in |logging_dest|. 197eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch const PathChar* log_file; 198eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch LogLockingState lock_log; 199eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch OldFileDeletionState delete_old; 200eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch}; 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Define different names for the BaseInitLoggingImpl() function depending on 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// whether NDEBUG is defined or not so that we'll fail to link if someone tries 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// to compile logging.cc with NDEBUG but includes logging.h without defining it, 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// or vice versa. 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if NDEBUG 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define BaseInitLoggingImpl BaseInitLoggingImpl_built_with_NDEBUG 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define BaseInitLoggingImpl BaseInitLoggingImpl_built_without_NDEBUG 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Implementation of the InitLogging() method declared below. We use a 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// more-specific name so we can #define it above without affecting other code 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// that has named stuff "InitLogging". 215eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen MurdochBASE_EXPORT bool BaseInitLoggingImpl(const LoggingSettings& settings); 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Sets the log file name and other global logging state. Calling this function 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// is recommended, and is normally done at the beginning of application init. 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// If you don't call it, all the flags will be initialized to their default 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// values, and there is a race condition that may leak a critical section 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// object if two threads try to do the first log at the same time. 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// See the definition of the enums above for descriptions and default values. 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The default log file is initialized to "debug.log" in the application 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// directory. You probably don't want this, especially since the program 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// directory may not be writable on an enduser's system. 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This function may be called a second time to re-direct logging (e.g after 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// loging in to a user partition), however it should never be called more than 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// twice. 231eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdochinline bool InitLogging(const LoggingSettings& settings) { 232eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch return BaseInitLoggingImpl(settings); 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Sets the log level. Anything at or above this level will be written to the 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// log file/displayed to the user (if applicable). Anything below this level 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// will be silently ignored. The log level defaults to 0 (everything is logged 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// up to level INFO) if this function is not called. 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Note that log messages for VLOG(x) are logged at level -x, so setting 2405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// the min log level to negative values enables verbose logging. 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BASE_EXPORT void SetMinLogLevel(int level); 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Gets the current log level. 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BASE_EXPORT int GetMinLogLevel(); 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Gets the VLOG default verbosity level. 2475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BASE_EXPORT int GetVlogVerbosity(); 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Gets the current vlog level for the given file (usually taken from 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// __FILE__). 2515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Note that |N| is the size *with* the null terminator. 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BASE_EXPORT int GetVlogLevelHelper(const char* file_start, size_t N); 2545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)template <size_t N> 2565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int GetVlogLevel(const char (&file)[N]) { 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return GetVlogLevelHelper(file, N); 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Sets the common items you want to be prepended to each log message. 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// process and thread IDs default to off, the timestamp defaults to on. 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// If this function is not called, logging defaults to writing the timestamp 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// only. 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BASE_EXPORT void SetLogItems(bool enable_process_id, bool enable_thread_id, 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool enable_timestamp, bool enable_tickcount); 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Sets whether or not you'd like to see fatal debug messages popped up in 2685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// a dialog box or not. 2695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Dialogs are not shown by default. 2705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BASE_EXPORT void SetShowErrorDialogs(bool enable_dialogs); 2715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Sets the Log Assert Handler that will be used to notify of check failures. 2735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The default handler shows a dialog box and then terminate the process, 2745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// however clients can use this function to override with their own handling 2755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// (e.g. a silent one for Unit Tests) 2765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)typedef void (*LogAssertHandlerFunction)(const std::string& str); 2775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BASE_EXPORT void SetLogAssertHandler(LogAssertHandlerFunction handler); 2785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Sets the Log Report Handler that will be used to notify of check failures 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// in non-debug mode. The default handler shows a dialog box and continues 2815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// the execution, however clients can use this function to override with their 2825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// own handling. 2835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)typedef void (*LogReportHandlerFunction)(const std::string& str); 2845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BASE_EXPORT void SetLogReportHandler(LogReportHandlerFunction handler); 2855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Sets the Log Message Handler that gets passed every log message before 2875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// it's sent to other log destinations (if any). 2885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Returns true to signal that it handled the message and the message 2895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// should not be sent to other log destinations. 2905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)typedef bool (*LogMessageHandlerFunction)(int severity, 2915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char* file, int line, size_t message_start, const std::string& str); 2925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BASE_EXPORT void SetLogMessageHandler(LogMessageHandlerFunction handler); 2935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BASE_EXPORT LogMessageHandlerFunction GetLogMessageHandler(); 2945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)typedef int LogSeverity; 2965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const LogSeverity LOG_VERBOSE = -1; // This is level 1 verbosity 2975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Note: the log severities are used to index into the array of names, 2985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// see log_severity_names. 2995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const LogSeverity LOG_INFO = 0; 3005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const LogSeverity LOG_WARNING = 1; 3015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const LogSeverity LOG_ERROR = 2; 3025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const LogSeverity LOG_ERROR_REPORT = 3; 3035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const LogSeverity LOG_FATAL = 4; 3045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const LogSeverity LOG_NUM_SEVERITIES = 5; 3055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// LOG_DFATAL is LOG_FATAL in debug mode, ERROR in normal mode 3075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifdef NDEBUG 3085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const LogSeverity LOG_DFATAL = LOG_ERROR; 3095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 3105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const LogSeverity LOG_DFATAL = LOG_FATAL; 3115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 3125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// A few definitions of macros that don't generate much code. These are used 3145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// by LOG() and LOG_IF, etc. Since these are used all over our code, it's 3155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// better to have compact code for these operations. 3165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_EX_INFO(ClassName, ...) \ 3175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::ClassName(__FILE__, __LINE__, logging::LOG_INFO , ##__VA_ARGS__) 3185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_EX_WARNING(ClassName, ...) \ 3195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::ClassName(__FILE__, __LINE__, logging::LOG_WARNING , ##__VA_ARGS__) 3205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_EX_ERROR(ClassName, ...) \ 3215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::ClassName(__FILE__, __LINE__, logging::LOG_ERROR , ##__VA_ARGS__) 3225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_EX_ERROR_REPORT(ClassName, ...) \ 3235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::ClassName(__FILE__, __LINE__, \ 3245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::LOG_ERROR_REPORT , ##__VA_ARGS__) 3255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_EX_FATAL(ClassName, ...) \ 3265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::ClassName(__FILE__, __LINE__, logging::LOG_FATAL , ##__VA_ARGS__) 3275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_EX_DFATAL(ClassName, ...) \ 3285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::ClassName(__FILE__, __LINE__, logging::LOG_DFATAL , ##__VA_ARGS__) 3295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_INFO \ 3315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) COMPACT_GOOGLE_LOG_EX_INFO(LogMessage) 3325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_WARNING \ 3335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) COMPACT_GOOGLE_LOG_EX_WARNING(LogMessage) 3345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_ERROR \ 3355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) COMPACT_GOOGLE_LOG_EX_ERROR(LogMessage) 3365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_ERROR_REPORT \ 3375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) COMPACT_GOOGLE_LOG_EX_ERROR_REPORT(LogMessage) 3385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_FATAL \ 3395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) COMPACT_GOOGLE_LOG_EX_FATAL(LogMessage) 3405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_DFATAL \ 3415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) COMPACT_GOOGLE_LOG_EX_DFATAL(LogMessage) 3425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#if defined(OS_WIN) 3445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// wingdi.h defines ERROR to be 0. When we call LOG(ERROR), it gets 3455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// substituted with 0, and it expands to COMPACT_GOOGLE_LOG_0. To allow us 3465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// to keep using this syntax, we define this macro to do the same thing 3475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// as COMPACT_GOOGLE_LOG_ERROR, and also define ERROR the same way that 3485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// the Windows SDK does for consistency. 3495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define ERROR 0 3505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_EX_0(ClassName, ...) \ 3515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) COMPACT_GOOGLE_LOG_EX_ERROR(ClassName , ##__VA_ARGS__) 3525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_0 COMPACT_GOOGLE_LOG_ERROR 3535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Needed for LOG_IS_ON(ERROR). 3545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const LogSeverity LOG_0 = LOG_ERROR; 3552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#endif 3565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// As special cases, we can assume that LOG_IS_ON(ERROR_REPORT) and 3585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// LOG_IS_ON(FATAL) always hold. Also, LOG_IS_ON(DFATAL) always holds 3595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// in debug mode. In particular, CHECK()s will always fire if they 3605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// fail. 3615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define LOG_IS_ON(severity) \ 3625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ((::logging::LOG_ ## severity) >= ::logging::GetMinLogLevel()) 3635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// We can't do any caching tricks with VLOG_IS_ON() like the 3655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// google-glog version since it requires GCC extensions. This means 3665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// that using the v-logging functions in conjunction with --vmodule 3675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// may be slow. 3685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define VLOG_IS_ON(verboselevel) \ 3695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ((verboselevel) <= ::logging::GetVlogLevel(__FILE__)) 3705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Helper macro which avoids evaluating the arguments to a stream if 3725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// the condition doesn't hold. 3735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define LAZY_STREAM(stream, condition) \ 3745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) !(condition) ? (void) 0 : ::logging::LogMessageVoidify() & (stream) 3755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// We use the preprocessor's merging operator, "##", so that, e.g., 3775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// LOG(INFO) becomes the token COMPACT_GOOGLE_LOG_INFO. There's some funny 3785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// subtle difference between ostream member streaming functions (e.g., 3795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ostream::operator<<(int) and ostream non-member streaming functions 3805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// (e.g., ::operator<<(ostream&, string&): it turns out that it's 3815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// impossible to stream something like a string directly to an unnamed 3825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ostream. We employ a neat hack by calling the stream() member 3835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// function of LogMessage which seems to avoid the problem. 3845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define LOG_STREAM(severity) COMPACT_GOOGLE_LOG_ ## severity.stream() 3855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define LOG(severity) LAZY_STREAM(LOG_STREAM(severity), LOG_IS_ON(severity)) 3875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define LOG_IF(severity, condition) \ 3885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(LOG_STREAM(severity), LOG_IS_ON(severity) && (condition)) 3895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define SYSLOG(severity) LOG(severity) 3915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define SYSLOG_IF(severity, condition) LOG_IF(severity, condition) 3925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The VLOG macros log with negative verbosities. 3945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define VLOG_STREAM(verbose_level) \ 3955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::LogMessage(__FILE__, __LINE__, -verbose_level).stream() 3965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define VLOG(verbose_level) \ 3985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(VLOG_STREAM(verbose_level), VLOG_IS_ON(verbose_level)) 3995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define VLOG_IF(verbose_level, condition) \ 4015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(VLOG_STREAM(verbose_level), \ 4025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) VLOG_IS_ON(verbose_level) && (condition)) 4035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined (OS_WIN) 4055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define VPLOG_STREAM(verbose_level) \ 4065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::Win32ErrorLogMessage(__FILE__, __LINE__, -verbose_level, \ 4075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ::logging::GetLastSystemErrorCode()).stream() 4085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(OS_POSIX) 4095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define VPLOG_STREAM(verbose_level) \ 4105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::ErrnoLogMessage(__FILE__, __LINE__, -verbose_level, \ 4115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ::logging::GetLastSystemErrorCode()).stream() 4125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 4135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define VPLOG(verbose_level) \ 4155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(VPLOG_STREAM(verbose_level), VLOG_IS_ON(verbose_level)) 4165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define VPLOG_IF(verbose_level, condition) \ 4185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(VPLOG_STREAM(verbose_level), \ 4195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) VLOG_IS_ON(verbose_level) && (condition)) 4205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// TODO(akalin): Add more VLOG variants, e.g. VPLOG. 4225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define LOG_ASSERT(condition) \ 4245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG_IF(FATAL, !(condition)) << "Assert failed: " #condition ". " 4255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define SYSLOG_ASSERT(condition) \ 4265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SYSLOG_IF(FATAL, !(condition)) << "Assert failed: " #condition ". " 4275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_WIN) 4295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define LOG_GETLASTERROR_STREAM(severity) \ 4305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) COMPACT_GOOGLE_LOG_EX_ ## severity(Win32ErrorLogMessage, \ 4315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ::logging::GetLastSystemErrorCode()).stream() 4325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define LOG_GETLASTERROR(severity) \ 4335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(LOG_GETLASTERROR_STREAM(severity), LOG_IS_ON(severity)) 4345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define LOG_GETLASTERROR_MODULE_STREAM(severity, module) \ 4355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) COMPACT_GOOGLE_LOG_EX_ ## severity(Win32ErrorLogMessage, \ 4365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ::logging::GetLastSystemErrorCode(), module).stream() 4375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define LOG_GETLASTERROR_MODULE(severity, module) \ 4385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(LOG_GETLASTERROR_STREAM(severity, module), \ 4395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG_IS_ON(severity)) 4405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// PLOG_STREAM is used by PLOG, which is the usual error logging macro 4415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// for each platform. 4425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define PLOG_STREAM(severity) LOG_GETLASTERROR_STREAM(severity) 4435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(OS_POSIX) 4445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define LOG_ERRNO_STREAM(severity) \ 4455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) COMPACT_GOOGLE_LOG_EX_ ## severity(ErrnoLogMessage, \ 4465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ::logging::GetLastSystemErrorCode()).stream() 4475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define LOG_ERRNO(severity) \ 4485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(LOG_ERRNO_STREAM(severity), LOG_IS_ON(severity)) 4495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// PLOG_STREAM is used by PLOG, which is the usual error logging macro 4505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// for each platform. 4515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define PLOG_STREAM(severity) LOG_ERRNO_STREAM(severity) 4525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 4535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define PLOG(severity) \ 4555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(PLOG_STREAM(severity), LOG_IS_ON(severity)) 4565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define PLOG_IF(severity, condition) \ 4585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(PLOG_STREAM(severity), LOG_IS_ON(severity) && (condition)) 4595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The actual stream used isn't important. 4615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define EAT_STREAM_PARAMETERS \ 4625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) true ? (void) 0 : ::logging::LogMessageVoidify() & LOG_STREAM(FATAL) 4635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// CHECK dies with a fatal error if condition is not true. It is *not* 4655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// controlled by NDEBUG, so the check will be executed regardless of 4665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// compilation mode. 4675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 4685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// We make sure CHECK et al. always evaluates their arguments, as 4695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// doing CHECK(FunctionWithSideEffect()) is a common idiom. 4705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 471a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#if defined(OFFICIAL_BUILD) && defined(NDEBUG) 4725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Make all CHECK functions discard their log strings to reduce code 474a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// bloat for official release builds. 4755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// TODO(akalin): This would be more valuable if there were some way to 4775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// remove BreakDebugger() from the backtrace, perhaps by turning it 4785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// into a macro (like __debugbreak() on Windows). 4795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CHECK(condition) \ 4805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) !(condition) ? ::base::debug::BreakDebugger() : EAT_STREAM_PARAMETERS 4815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define PCHECK(condition) CHECK(condition) 4835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CHECK_OP(name, op, val1, val2) CHECK((val1) op (val2)) 4855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 4875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CHECK(condition) \ 4895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(LOG_STREAM(FATAL), !(condition)) \ 4905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << "Check failed: " #condition ". " 4915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define PCHECK(condition) \ 4935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(PLOG_STREAM(FATAL), !(condition)) \ 4945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << "Check failed: " #condition ". " 4955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Helper macro for binary operators. 4975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Don't use this macro directly in your code, use CHECK_EQ et al below. 4985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 4995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// TODO(akalin): Rewrite this so that constructs like if (...) 5005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// CHECK_EQ(...) else { ... } work properly. 5015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CHECK_OP(name, op, val1, val2) \ 5025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (std::string* _result = \ 5035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::Check##name##Impl((val1), (val2), \ 5045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) #val1 " " #op " " #val2)) \ 5055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::LogMessage(__FILE__, __LINE__, _result).stream() 5065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 5085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Build the error message string. This is separate from the "Impl" 5105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// function template because it is not performance critical and so can 5115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// be out of line, while the "Impl" code should be inline. Caller 5125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// takes ownership of the returned string. 5135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)template<class t1, class t2> 5145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)std::string* MakeCheckOpString(const t1& v1, const t2& v2, const char* names) { 5155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::ostringstream ss; 5165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ss << names << " (" << v1 << " vs. " << v2 << ")"; 5175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string* msg = new std::string(ss.str()); 5185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return msg; 5195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// MSVC doesn't like complex extern templates and DLLs. 5225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if !defined(COMPILER_MSVC) 5235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Commonly used instantiations of MakeCheckOpString<>. Explicitly instantiated 5245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// in logging.cc. 5255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)extern template BASE_EXPORT std::string* MakeCheckOpString<int, int>( 5265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int&, const int&, const char* names); 5275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)extern template BASE_EXPORT 5285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)std::string* MakeCheckOpString<unsigned long, unsigned long>( 5295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const unsigned long&, const unsigned long&, const char* names); 5305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)extern template BASE_EXPORT 5315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)std::string* MakeCheckOpString<unsigned long, unsigned int>( 5325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const unsigned long&, const unsigned int&, const char* names); 5335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)extern template BASE_EXPORT 5345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)std::string* MakeCheckOpString<unsigned int, unsigned long>( 5355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const unsigned int&, const unsigned long&, const char* names); 5365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)extern template BASE_EXPORT 5375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)std::string* MakeCheckOpString<std::string, std::string>( 5385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const std::string&, const std::string&, const char* name); 5395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 5405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Helper functions for CHECK_OP macro. 5425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The (int, int) specialization works around the issue that the compiler 5435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// will not instantiate the template version of the function on values of 5445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// unnamed enum type - see comment below. 5455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DEFINE_CHECK_OP_IMPL(name, op) \ 5465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) template <class t1, class t2> \ 5475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline std::string* Check##name##Impl(const t1& v1, const t2& v2, \ 5485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char* names) { \ 5495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (v1 op v2) return NULL; \ 5505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) else return MakeCheckOpString(v1, v2, names); \ 5515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } \ 5525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inline std::string* Check##name##Impl(int v1, int v2, const char* names) { \ 5535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (v1 op v2) return NULL; \ 5545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) else return MakeCheckOpString(v1, v2, names); \ 5555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)DEFINE_CHECK_OP_IMPL(EQ, ==) 5575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)DEFINE_CHECK_OP_IMPL(NE, !=) 5585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)DEFINE_CHECK_OP_IMPL(LE, <=) 5595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)DEFINE_CHECK_OP_IMPL(LT, < ) 5605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)DEFINE_CHECK_OP_IMPL(GE, >=) 5615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)DEFINE_CHECK_OP_IMPL(GT, > ) 5625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#undef DEFINE_CHECK_OP_IMPL 5635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CHECK_EQ(val1, val2) CHECK_OP(EQ, ==, val1, val2) 5655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CHECK_NE(val1, val2) CHECK_OP(NE, !=, val1, val2) 5665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CHECK_LE(val1, val2) CHECK_OP(LE, <=, val1, val2) 5675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CHECK_LT(val1, val2) CHECK_OP(LT, < , val1, val2) 5685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CHECK_GE(val1, val2) CHECK_OP(GE, >=, val1, val2) 5695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CHECK_GT(val1, val2) CHECK_OP(GT, > , val1, val2) 5705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 571a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#if defined(NDEBUG) 5725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define ENABLE_DLOG 0 5735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 5745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define ENABLE_DLOG 1 575a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#endif 576a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 577a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#if defined(NDEBUG) && !defined(DCHECK_ALWAYS_ON) 578a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#define DCHECK_IS_ON 0 579a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#else 580a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#define DCHECK_IS_ON 1 5815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 5825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Definitions for DLOG et al. 5845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if ENABLE_DLOG 5865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DLOG_IS_ON(severity) LOG_IS_ON(severity) 5885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DLOG_IF(severity, condition) LOG_IF(severity, condition) 5895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DLOG_ASSERT(condition) LOG_ASSERT(condition) 5905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DPLOG_IF(severity, condition) PLOG_IF(severity, condition) 5915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DVLOG_IF(verboselevel, condition) VLOG_IF(verboselevel, condition) 5925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DVPLOG_IF(verboselevel, condition) VPLOG_IF(verboselevel, condition) 5935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else // ENABLE_DLOG 5955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// If ENABLE_DLOG is off, we want to avoid emitting any references to 5975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// |condition| (which may reference a variable defined only if NDEBUG 5985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// is not defined). Contrast this with DCHECK et al., which has 5995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// different behavior. 6005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DLOG_IS_ON(severity) false 6025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DLOG_IF(severity, condition) EAT_STREAM_PARAMETERS 6035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DLOG_ASSERT(condition) EAT_STREAM_PARAMETERS 6045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DPLOG_IF(severity, condition) EAT_STREAM_PARAMETERS 6055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DVLOG_IF(verboselevel, condition) EAT_STREAM_PARAMETERS 6065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DVPLOG_IF(verboselevel, condition) EAT_STREAM_PARAMETERS 6075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // ENABLE_DLOG 6095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// DEBUG_MODE is for uses like 6115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// if (DEBUG_MODE) foo.CheckThatFoo(); 6125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// instead of 6135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// #ifndef NDEBUG 6145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// foo.CheckThatFoo(); 6155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// #endif 6165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 6175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// We tie its state to ENABLE_DLOG. 6185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)enum { DEBUG_MODE = ENABLE_DLOG }; 6195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#undef ENABLE_DLOG 6215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DLOG(severity) \ 6235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(LOG_STREAM(severity), DLOG_IS_ON(severity)) 6245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_WIN) 6265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DLOG_GETLASTERROR(severity) \ 6275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(LOG_GETLASTERROR_STREAM(severity), DLOG_IS_ON(severity)) 6285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DLOG_GETLASTERROR_MODULE(severity, module) \ 6295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(LOG_GETLASTERROR_STREAM(severity, module), \ 6305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG_IS_ON(severity)) 6315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(OS_POSIX) 6325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DLOG_ERRNO(severity) \ 6335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(LOG_ERRNO_STREAM(severity), DLOG_IS_ON(severity)) 6345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 6355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DPLOG(severity) \ 6375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_STREAM(PLOG_STREAM(severity), DLOG_IS_ON(severity)) 6385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DVLOG(verboselevel) DVLOG_IF(verboselevel, VLOG_IS_ON(verboselevel)) 6405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DVPLOG(verboselevel) DVPLOG_IF(verboselevel, VLOG_IS_ON(verboselevel)) 6425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Definitions for DCHECK et al. 6445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 645a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#if DCHECK_IS_ON 6465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_EX_DCHECK(ClassName, ...) \ 6485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) COMPACT_GOOGLE_LOG_EX_FATAL(ClassName , ##__VA_ARGS__) 6495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_DCHECK COMPACT_GOOGLE_LOG_FATAL 6505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const LogSeverity LOG_DCHECK = LOG_FATAL; 6515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 652a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#else // DCHECK_IS_ON 6535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 654a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// These are just dummy values. 6555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_EX_DCHECK(ClassName, ...) \ 6565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) COMPACT_GOOGLE_LOG_EX_INFO(ClassName , ##__VA_ARGS__) 6575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define COMPACT_GOOGLE_LOG_DCHECK COMPACT_GOOGLE_LOG_INFO 6585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const LogSeverity LOG_DCHECK = LOG_INFO; 6595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 660a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#endif // DCHECK_IS_ON 6615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// DCHECK et al. make sure to reference |condition| regardless of 6635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// whether DCHECKs are enabled; this is so that we don't get unused 6645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// variable warnings if the only use of a variable is in a DCHECK. 6655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This behavior is different from DLOG_IF et al. 6665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 667a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#define DCHECK(condition) \ 668a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) LAZY_STREAM(LOG_STREAM(DCHECK), DCHECK_IS_ON && !(condition)) \ 6695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << "Check failed: " #condition ". " 6705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 671a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#define DPCHECK(condition) \ 672a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) LAZY_STREAM(PLOG_STREAM(DCHECK), DCHECK_IS_ON && !(condition)) \ 6735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << "Check failed: " #condition ". " 6745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Helper macro for binary operators. 6765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Don't use this macro directly in your code, use DCHECK_EQ et al below. 6775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DCHECK_OP(name, op, val1, val2) \ 678a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (DCHECK_IS_ON) \ 6795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (std::string* _result = \ 6805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::Check##name##Impl((val1), (val2), \ 6815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) #val1 " " #op " " #val2)) \ 6825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::LogMessage( \ 6835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) __FILE__, __LINE__, ::logging::LOG_DCHECK, \ 6845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) _result).stream() 6855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Equality/Inequality checks - compare two values, and log a 6875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// LOG_DCHECK message including the two values when the result is not 6885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// as expected. The values must have operator<<(ostream, ...) 6895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// defined. 6905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 6915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// You may append to the error message like so: 6925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// DCHECK_NE(1, 2) << ": The world must be ending!"; 6935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 6945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// We are very careful to ensure that each argument is evaluated exactly 6955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// once, and that anything which is legal to pass as a function argument is 6965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// legal here. In particular, the arguments may be temporary expressions 6975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// which will end up being destroyed at the end of the apparent statement, 6985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// for example: 6995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// DCHECK_EQ(string("abc")[1], 'b'); 7005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 7015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// WARNING: These may not compile correctly if one of the arguments is a pointer 7025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// and the other is NULL. To work around this, simply static_cast NULL to the 7035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// type of the desired pointer. 7045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DCHECK_EQ(val1, val2) DCHECK_OP(EQ, ==, val1, val2) 7065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DCHECK_NE(val1, val2) DCHECK_OP(NE, !=, val1, val2) 7075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DCHECK_LE(val1, val2) DCHECK_OP(LE, <=, val1, val2) 7085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DCHECK_LT(val1, val2) DCHECK_OP(LT, < , val1, val2) 7095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DCHECK_GE(val1, val2) DCHECK_OP(GE, >=, val1, val2) 7105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DCHECK_GT(val1, val2) DCHECK_OP(GT, > , val1, val2) 7115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 71268043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles)#if defined(NDEBUG) && defined(OS_CHROMEOS) 71368043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles)#define NOTREACHED() LOG(ERROR) << "NOTREACHED() hit in " << \ 71468043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles) __FUNCTION__ << ". " 71568043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles)#else 7165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define NOTREACHED() DCHECK(false) 71768043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles)#endif 7185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Redefine the standard assert to use our nice log files 7205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#undef assert 7215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define assert(x) DLOG_ASSERT(x) 7225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This class more or less represents a particular log message. You 7245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// create an instance of LogMessage and then stream stuff to it. 7255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// When you finish streaming to it, ~LogMessage is called and the 7265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// full message gets streamed to the appropriate destination. 7275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 7285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// You shouldn't actually use LogMessage's constructor to log things, 7295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// though. You should use the LOG() macro (and variants thereof) 7305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// above. 7315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class BASE_EXPORT LogMessage { 7325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 7335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LogMessage(const char* file, int line, LogSeverity severity, int ctr); 7345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Two special constructors that generate reduced amounts of code at 7365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // LOG call sites for common cases. 7375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 7385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Used for LOG(INFO): Implied are: 7395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // severity = LOG_INFO, ctr = 0 7405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 7415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Using this constructor instead of the more complex constructor above 7425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // saves a couple of bytes per call site. 7435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LogMessage(const char* file, int line); 7445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Used for LOG(severity) where severity != INFO. Implied 7465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // are: ctr = 0 7475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 7485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Using this constructor instead of the more complex constructor above 7495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // saves a couple of bytes per call site. 7505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LogMessage(const char* file, int line, LogSeverity severity); 7515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // A special constructor used for check failures. Takes ownership 7535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // of the given string. 7545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Implied severity = LOG_FATAL 7555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LogMessage(const char* file, int line, std::string* result); 7565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // A special constructor used for check failures, with the option to 7585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // specify severity. Takes ownership of the given string. 7595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LogMessage(const char* file, int line, LogSeverity severity, 7605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string* result); 7615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ~LogMessage(); 7635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::ostream& stream() { return stream_; } 7655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 7675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void Init(const char* file, int line); 7685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LogSeverity severity_; 7705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::ostringstream stream_; 7715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t message_start_; // Offset of the start of the message (past prefix 7725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // info). 7735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The file and line information passed in to the constructor. 7745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char* file_; 7755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int line_; 7765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_WIN) 7785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Stores the current value of GetLastError in the constructor and restores 7795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // it in the destructor by calling SetLastError. 7805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // This is useful since the LogMessage class uses a lot of Win32 calls 7815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // that will lose the value of GLE and the code that called the log function 7825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // will have lost the thread error value when the log call returns. 7835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class SaveLastError { 7845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 7855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SaveLastError(); 7865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ~SaveLastError(); 7875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned long get_error() const { return last_error_; } 7895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) protected: 7915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned long last_error_; 7925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 7935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SaveLastError last_error_; 7955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 7965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(LogMessage); 7985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 7995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// A non-macro interface to the log facility; (useful 8015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// when the logging level is not a compile-time constant). 8025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline void LogAtLevel(int const log_level, std::string const &msg) { 8035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LogMessage(__FILE__, __LINE__, log_level).stream() << msg; 8045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 8055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This class is used to explicitly ignore values in the conditional 8075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// logging macros. This avoids compiler warnings like "value computed 8085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// is not used" and "statement has no effect". 8095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class LogMessageVoidify { 8105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 8115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LogMessageVoidify() { } 8125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // This has to be an operator with a precedence lower than << but 8135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // higher than ?: 8145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void operator&(std::ostream&) { } 8155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 8165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_WIN) 8185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)typedef unsigned long SystemErrorCode; 8195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(OS_POSIX) 8205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)typedef int SystemErrorCode; 8215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 8225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Alias for ::GetLastError() on Windows and errno on POSIX. Avoids having to 8245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// pull in windows.h just for GetLastError() and DWORD. 8255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BASE_EXPORT SystemErrorCode GetLastSystemErrorCode(); 8265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_WIN) 8285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Appends a formatted system message of the GetLastError() type. 8295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class BASE_EXPORT Win32ErrorLogMessage { 8305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 8315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Win32ErrorLogMessage(const char* file, 8325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int line, 8335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LogSeverity severity, 8345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SystemErrorCode err, 8355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char* module); 8365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Win32ErrorLogMessage(const char* file, 8385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int line, 8395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LogSeverity severity, 8405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SystemErrorCode err); 8415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Appends the error message before destructing the encapsulated class. 8435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ~Win32ErrorLogMessage(); 8445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::ostream& stream() { return log_message_.stream(); } 8465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 8485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SystemErrorCode err_; 8495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Optional name of the module defining the error. 8505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char* module_; 8515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LogMessage log_message_; 8525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(Win32ErrorLogMessage); 8545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 8555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(OS_POSIX) 8565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Appends a formatted system message of the errno type 8575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class BASE_EXPORT ErrnoLogMessage { 8585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 8595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ErrnoLogMessage(const char* file, 8605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int line, 8615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LogSeverity severity, 8625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SystemErrorCode err); 8635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Appends the error message before destructing the encapsulated class. 8655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ~ErrnoLogMessage(); 8665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::ostream& stream() { return log_message_.stream(); } 8685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 8705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SystemErrorCode err_; 8715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LogMessage log_message_; 8725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(ErrnoLogMessage); 8745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 8755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // OS_WIN 8765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Closes the log file explicitly if open. 8785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// NOTE: Since the log file is opened as necessary by the action of logging 8795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// statements, there's no guarantee that it will stay closed 8805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// after this call. 8815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BASE_EXPORT void CloseLogFile(); 8825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Async signal safe logging mechanism. 8845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BASE_EXPORT void RawLog(int level, const char* message); 8855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define RAW_LOG(level, message) logging::RawLog(logging::LOG_ ## level, message) 8875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define RAW_CHECK(condition) \ 8895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) do { \ 8905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!(condition)) \ 8915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) logging::RawLog(logging::LOG_FATAL, "Check failed: " #condition "\n"); \ 8925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } while (0) 8935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#if defined(OS_WIN) 8952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Returns the default log file path. 8962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)BASE_EXPORT std::wstring GetLogFileFullPath(); 8972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#endif 8982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 8995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace logging 9005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// These functions are provided as a convenience for logging, which is where we 9025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// use streams (it is against Google style to use streams in other places). It 9035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// is designed to allow you to emit non-ASCII Unicode strings to the log file, 9045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// which is normally ASCII. It is relatively slow, so try not to use it for 9055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// common cases. Non-ASCII characters will be converted to UTF-8 by these 9065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// operators. 9075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BASE_EXPORT std::ostream& operator<<(std::ostream& out, const wchar_t* wstr); 9085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline std::ostream& operator<<(std::ostream& out, const std::wstring& wstr) { 9095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return out << wstr.c_str(); 9105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 9115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The NOTIMPLEMENTED() macro annotates codepaths which have 9135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// not been implemented yet. 9145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 9155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The implementation of this macro is controlled by NOTIMPLEMENTED_POLICY: 9165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 0 -- Do nothing (stripped by compiler) 9175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 1 -- Warn at compile time 9185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 2 -- Fail at compile time 9195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 3 -- Fail at runtime (DCHECK) 9205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 4 -- [default] LOG(ERROR) at runtime 9215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 5 -- LOG(ERROR) at runtime, only once per call-site 9225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef NOTIMPLEMENTED_POLICY 9245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_ANDROID) && defined(OFFICIAL_BUILD) 9255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define NOTIMPLEMENTED_POLICY 0 9265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 9275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Select default policy: LOG(ERROR) 9285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define NOTIMPLEMENTED_POLICY 4 9295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 9305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 9315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(COMPILER_GCC) 9335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// On Linux, with GCC, we can use __PRETTY_FUNCTION__ to get the demangled name 9345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// of the current function in the NOTIMPLEMENTED message. 9355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define NOTIMPLEMENTED_MSG "Not implemented reached in " << __PRETTY_FUNCTION__ 9365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 9375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define NOTIMPLEMENTED_MSG "NOT IMPLEMENTED" 9385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 9395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if NOTIMPLEMENTED_POLICY == 0 9415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define NOTIMPLEMENTED() EAT_STREAM_PARAMETERS 9425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif NOTIMPLEMENTED_POLICY == 1 9435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// TODO, figure out how to generate a warning 9445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define NOTIMPLEMENTED() COMPILE_ASSERT(false, NOT_IMPLEMENTED) 9455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif NOTIMPLEMENTED_POLICY == 2 9465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define NOTIMPLEMENTED() COMPILE_ASSERT(false, NOT_IMPLEMENTED) 9475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif NOTIMPLEMENTED_POLICY == 3 9485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define NOTIMPLEMENTED() NOTREACHED() 9495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif NOTIMPLEMENTED_POLICY == 4 9505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define NOTIMPLEMENTED() LOG(ERROR) << NOTIMPLEMENTED_MSG 9515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif NOTIMPLEMENTED_POLICY == 5 9525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define NOTIMPLEMENTED() do {\ 9532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) static bool logged_once = false;\ 9542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) LOG_IF(ERROR, !logged_once) << NOTIMPLEMENTED_MSG;\ 9552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) logged_once = true;\ 9562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} while(0);\ 9572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)EAT_STREAM_PARAMETERS 9585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 9595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // BASE_LOGGING_H_ 961