chrome/common/logging_chrome.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "build/build_config.h"
   6
   7 // Need to include this before most other files because it defines
   8 // IPC_MESSAGE_LOG_ENABLED. We need to use it to define
   9 // IPC_MESSAGE_MACROS_LOG_ENABLED so render_messages.h will generate the
  10 // ViewMsgLog et al. functions.
  11 #include "ipc/ipc_message.h"
  12
  13 // On Windows, the about:ipc dialog shows IPCs; on POSIX, we hook up a
  14 // logger in this file.  (We implement about:ipc on Mac but implement
  15 // the loggers here anyway).  We need to do this real early to be sure
  16 // IPC_MESSAGE_MACROS_LOG_ENABLED doesn't get undefined.
  17 #if defined(OS_POSIX) && defined(IPC_MESSAGE_LOG_ENABLED)
  18 #define IPC_MESSAGE_MACROS_LOG_ENABLED
  19 #include "content/public/common/content_ipc_logging.h"
  20 #define IPC_LOG_TABLE_ADD_ENTRY(msg_id, logger) \
  21     content::RegisterIPCLogger(msg_id, logger)
  22 #include "chrome/common/all_messages.h"
  23 #endif
  24
  25 #if defined(OS_WIN)
  26 #include <windows.h>
  27 #endif
  28
  29 #include <fstream>
  30
  31 #include "chrome/common/logging_chrome.h"
  32
  33 #include "base/command_line.h"
  34 #include "base/compiler_specific.h"
  35 #include "base/debug/debugger.h"
  36 #include "base/debug/dump_without_crashing.h"
  37 #include "base/environment.h"
  38 #include "base/files/file_path.h"
  39 #include "base/files/file_util.h"
  40 #include "base/logging.h"
  41 #include "base/path_service.h"
  42 #include "base/strings/string_number_conversions.h"
  43 #include "base/strings/string_util.h"
  44 #include "base/strings/stringprintf.h"
  45 #include "base/strings/utf_string_conversions.h"
  46 #include "base/threading/thread_restrictions.h"
  47 #include "base/time/time.h"
  48 #include "chrome/common/chrome_constants.h"
  49 #include "chrome/common/chrome_paths.h"
  50 #include "chrome/common/chrome_switches.h"
  51 #include "chrome/common/env_vars.h"
  52 #include "ipc/ipc_logging.h"
  53
  54 #if defined(OS_CHROMEOS)
  55 #include "chromeos/chromeos_switches.h"
  56 #endif
  57
  58 #if defined(OS_WIN)
  59 #include <initguid.h>
  60 #include "base/logging_win.h"
  61 #endif
  62
  63 namespace {
  64
  65 // When true, this means that error dialogs should not be shown.
  66 bool dialogs_are_suppressed_ = false;
  67
  68 // This should be true for exactly the period between the end of
  69 // InitChromeLogging() and the beginning of CleanupChromeLogging().
  70 bool chrome_logging_initialized_ = false;
  71
  72 // Set if we called InitChromeLogging() but failed to initialize.
  73 bool chrome_logging_failed_ = false;
  74
  75 // This should be true for exactly the period between the end of
  76 // InitChromeLogging() and the beginning of CleanupChromeLogging().
  77 bool chrome_logging_redirected_ = false;
  78
  79 #if defined(OS_WIN)
  80 // {7FE69228-633E-4f06-80C1-527FEA23E3A7}
  81 const GUID kChromeTraceProviderName = {
  82     0x7fe69228, 0x633e, 0x4f06,
  83         { 0x80, 0xc1, 0x52, 0x7f, 0xea, 0x23, 0xe3, 0xa7 } };
  84 #endif
  85
  86 // Assertion handler for logging errors that occur when dialogs are
  87 // silenced.  To record a new error, pass the log string associated
  88 // with that error in the str parameter.
  89 MSVC_DISABLE_OPTIMIZE();
  90 void SilentRuntimeAssertHandler(const std::string& str) {
  91   base::debug::BreakDebugger();
  92 }
  93 MSVC_ENABLE_OPTIMIZE();
  94
  95 // Suppresses error/assertion dialogs and enables the logging of
  96 // those errors into silenced_errors_.
  97 void SuppressDialogs() {
  98   if (dialogs_are_suppressed_)
  99     return;
 100
 101   logging::SetLogAssertHandler(SilentRuntimeAssertHandler);
 102
 103 #if defined(OS_WIN)
 104   UINT new_flags = SEM_FAILCRITICALERRORS |
 105                    SEM_NOGPFAULTERRORBOX |
 106                    SEM_NOOPENFILEERRORBOX;
 107
 108   // Preserve existing error mode, as discussed at http://t/dmea
 109   UINT existing_flags = SetErrorMode(new_flags);
 110   SetErrorMode(existing_flags | new_flags);
 111 #endif
 112
 113   dialogs_are_suppressed_ = true;
 114 }
 115
 116 }  // anonymous namespace
 117
 118 namespace logging {
 119
 120 LoggingDestination DetermineLogMode(const base::CommandLine& command_line) {
 121   // only use OutputDebugString in debug mode
 122 #ifdef NDEBUG
 123   bool enable_logging = false;
 124   const char *kInvertLoggingSwitch = switches::kEnableLogging;
 125   const logging::LoggingDestination kDefaultLoggingMode = logging::LOG_TO_FILE;
 126 #else
 127   bool enable_logging = true;
 128   const char *kInvertLoggingSwitch = switches::kDisableLogging;
 129   const logging::LoggingDestination kDefaultLoggingMode = logging::LOG_TO_ALL;
 130 #endif
 131
 132   if (command_line.HasSwitch(kInvertLoggingSwitch))
 133     enable_logging = !enable_logging;
 134
 135   logging::LoggingDestination log_mode;
 136   if (enable_logging) {
 137     // Let --enable-logging=stderr force only stderr, particularly useful for
 138     // non-debug builds where otherwise you can't get logs to stderr at all.
 139     if (command_line.GetSwitchValueASCII(switches::kEnableLogging) == "stderr")
 140       log_mode = logging::LOG_TO_SYSTEM_DEBUG_LOG;
 141     else
 142       log_mode = kDefaultLoggingMode;
 143   } else {
 144     log_mode = logging::LOG_NONE;
 145   }
 146   return log_mode;
 147 }
 148
 149 #if defined(OS_CHROMEOS)
 150 namespace {
 151 base::FilePath SetUpSymlinkIfNeeded(const base::FilePath& symlink_path,
 152                                     bool new_log) {
 153   DCHECK(!symlink_path.empty());
 154
 155   // If not starting a new log, then just log through the existing
 156   // symlink, but if the symlink doesn't exist, create it.  If
 157   // starting a new log, then delete the old symlink and make a new
 158   // one to a fresh log file.
 159   base::FilePath target_path;
 160   bool symlink_exists = base::PathExists(symlink_path);
 161   if (new_log || !symlink_exists) {
 162     target_path = GenerateTimestampedName(symlink_path, base::Time::Now());
 163
 164     // We don't care if the unlink fails; we're going to continue anyway.
 165     if (::unlink(symlink_path.value().c_str()) == -1) {
 166       if (symlink_exists) // only warn if we might expect it to succeed.
 167         DPLOG(WARNING) << "Unable to unlink " << symlink_path.value();
 168     }
 169     if (!base::CreateSymbolicLink(target_path, symlink_path)) {
 170       DPLOG(ERROR) << "Unable to create symlink " << symlink_path.value()
 171                    << " pointing at " << target_path.value();
 172     }
 173   } else {
 174     if (!base::ReadSymbolicLink(symlink_path, &target_path))
 175       DPLOG(ERROR) << "Unable to read symlink " << symlink_path.value();
 176   }
 177   return target_path;
 178 }
 179
 180 void RemoveSymlinkAndLog(const base::FilePath& link_path,
 181                          const base::FilePath& target_path) {
 182   if (::unlink(link_path.value().c_str()) == -1)
 183     DPLOG(WARNING) << "Unable to unlink symlink " << link_path.value();
 184   if (::unlink(target_path.value().c_str()) == -1)
 185     DPLOG(WARNING) << "Unable to unlink log file " << target_path.value();
 186 }
 187
 188 }  // anonymous namespace
 189
 190 base::FilePath GetSessionLogDir(const base::CommandLine& command_line) {
 191   base::FilePath log_dir;
 192   std::string log_dir_str;
 193   scoped_ptr<base::Environment> env(base::Environment::Create());
 194   if (env->GetVar(env_vars::kSessionLogDir, &log_dir_str) &&
 195       !log_dir_str.empty()) {
 196     log_dir = base::FilePath(log_dir_str);
 197   } else if (command_line.HasSwitch(chromeos::switches::kLoginProfile)) {
 198     PathService::Get(chrome::DIR_USER_DATA, &log_dir);
 199     base::FilePath profile_dir;
 200     std::string login_profile_value =
 201         command_line.GetSwitchValueASCII(chromeos::switches::kLoginProfile);
 202     if (login_profile_value == chrome::kLegacyProfileDir ||
 203         login_profile_value == chrome::kTestUserProfileDir) {
 204       profile_dir = base::FilePath(login_profile_value);
 205     } else {
 206       // We could not use g_browser_process > profile_helper() here.
 207       std::string profile_dir_str = chrome::kProfileDirPrefix;
 208       profile_dir_str.append(login_profile_value);
 209       profile_dir = base::FilePath(profile_dir_str);
 210     }
 211     log_dir = log_dir.Append(profile_dir);
 212   }
 213   return log_dir;
 214 }
 215
 216 base::FilePath GetSessionLogFile(const base::CommandLine& command_line) {
 217   return GetSessionLogDir(command_line).Append(GetLogFileName().BaseName());
 218 }
 219
 220 void RedirectChromeLogging(const base::CommandLine& command_line) {
 221   if (chrome_logging_redirected_) {
 222     // TODO(nkostylev): Support multiple active users. http://crbug.com/230345
 223     LOG(WARNING) << "NOT redirecting logging for multi-profiles case.";
 224     return;
 225   }
 226
 227   DCHECK(!chrome_logging_redirected_) <<
 228     "Attempted to redirect logging when it was already initialized.";
 229
 230   // Redirect logs to the session log directory, if set.  Otherwise
 231   // defaults to the profile dir.
 232   base::FilePath log_path = GetSessionLogFile(command_line);
 233
 234   // Creating symlink causes us to do blocking IO on UI thread.
 235   // Temporarily allow it until we fix http://crbug.com/61143
 236   base::ThreadRestrictions::ScopedAllowIO allow_io;
 237   // Always force a new symlink when redirecting.
 238   base::FilePath target_path = SetUpSymlinkIfNeeded(log_path, true);
 239
 240   // ChromeOS always logs through the symlink, so it shouldn't be
 241   // deleted if it already exists.
 242   logging::LoggingSettings settings;
 243   settings.logging_dest = DetermineLogMode(command_line);
 244   settings.log_file = log_path.value().c_str();
 245   if (!logging::InitLogging(settings)) {
 246     DLOG(ERROR) << "Unable to initialize logging to " << log_path.value();
 247     RemoveSymlinkAndLog(log_path, target_path);
 248   } else {
 249     chrome_logging_redirected_ = true;
 250   }
 251 }
 252
 253 #endif  // OS_CHROMEOS
 254
 255 void InitChromeLogging(const base::CommandLine& command_line,
 256                        OldFileDeletionState delete_old_log_file) {
 257   DCHECK(!chrome_logging_initialized_) <<
 258     "Attempted to initialize logging when it was already initialized.";
 259
 260   LoggingDestination logging_dest = DetermineLogMode(command_line);
 261   LogLockingState log_locking_state = LOCK_LOG_FILE;
 262   base::FilePath log_path;
 263 #if defined(OS_CHROMEOS)
 264   base::FilePath target_path;
 265 #endif
 266
 267   // Don't resolve the log path unless we need to. Otherwise we leave an open
 268   // ALPC handle after sandbox lockdown on Windows.
 269   if ((logging_dest & LOG_TO_FILE) != 0) {
 270     log_path = GetLogFileName();
 271
 272 #if defined(OS_CHROMEOS)
 273     // For BWSI (Incognito) logins, we want to put the logs in the user
 274     // profile directory that is created for the temporary session instead
 275     // of in the system log directory, for privacy reasons.
 276     if (command_line.HasSwitch(chromeos::switches::kGuestSession))
 277       log_path = GetSessionLogFile(command_line);
 278
 279     // On ChromeOS we log to the symlink.  We force creation of a new
 280     // symlink if we've been asked to delete the old log, since that
 281     // indicates the start of a new session.
 282     target_path = SetUpSymlinkIfNeeded(
 283         log_path, delete_old_log_file == logging::DELETE_OLD_LOG_FILE);
 284
 285     // Because ChromeOS manages the move to a new session by redirecting
 286     // the link, it shouldn't remove the old file in the logging code,
 287     // since that will remove the newly created link instead.
 288     delete_old_log_file = logging::APPEND_TO_OLD_LOG_FILE;
 289 #endif
 290   } else {
 291     log_locking_state = DONT_LOCK_LOG_FILE;
 292   }
 293
 294   logging::LoggingSettings settings;
 295   settings.logging_dest = logging_dest;
 296   settings.log_file = log_path.value().c_str();
 297   settings.lock_log = log_locking_state;
 298   settings.delete_old = delete_old_log_file;
 299   bool success = logging::InitLogging(settings);
 300
 301 #if defined(OS_CHROMEOS)
 302   if (!success) {
 303     DPLOG(ERROR) << "Unable to initialize logging to " << log_path.value()
 304                 << " (which should be a link to " << target_path.value() << ")";
 305     RemoveSymlinkAndLog(log_path, target_path);
 306     chrome_logging_failed_ = true;
 307     return;
 308   }
 309 #else
 310   if (!success) {
 311     DPLOG(ERROR) << "Unable to initialize logging to " << log_path.value();
 312     chrome_logging_failed_ = true;
 313     return;
 314   }
 315 #endif
 316
 317   // Default to showing error dialogs.
 318   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
 319           switches::kNoErrorDialogs))
 320     logging::SetShowErrorDialogs(true);
 321
 322   // we want process and thread IDs because we have a lot of things running
 323   logging::SetLogItems(true,  // enable_process_id
 324                        true,  // enable_thread_id
 325                        true,  // enable_timestamp
 326                        false);  // enable_tickcount
 327
 328   // We call running in unattended mode "headless", and allow
 329   // headless mode to be configured either by the Environment
 330   // Variable or by the Command Line Switch.  This is for
 331   // automated test purposes.
 332   scoped_ptr<base::Environment> env(base::Environment::Create());
 333   if (env->HasVar(env_vars::kHeadless) ||
 334       command_line.HasSwitch(switches::kNoErrorDialogs))
 335     SuppressDialogs();
 336
 337   // Use a minimum log level if the command line asks for one,
 338   // otherwise leave it at the default level (INFO).
 339   if (command_line.HasSwitch(switches::kLoggingLevel)) {
 340     std::string log_level = command_line.GetSwitchValueASCII(
 341         switches::kLoggingLevel);
 342     int level = 0;
 343     if (base::StringToInt(log_level, &level) &&
 344         level >= 0 && level < LOG_NUM_SEVERITIES) {
 345       logging::SetMinLogLevel(level);
 346     } else {
 347       DLOG(WARNING) << "Bad log level: " << log_level;
 348     }
 349   }
 350
 351 #if defined(OS_WIN)
 352   // Enable trace control and transport through event tracing for Windows.
 353   logging::LogEventProvider::Initialize(kChromeTraceProviderName);
 354 #endif
 355
 356   chrome_logging_initialized_ = true;
 357 }
 358
 359 // This is a no-op, but we'll keep it around in case
 360 // we need to do more cleanup in the future.
 361 void CleanupChromeLogging() {
 362   if (chrome_logging_failed_)
 363     return;  // We failed to initiailize logging, no cleanup.
 364
 365   DCHECK(chrome_logging_initialized_) <<
 366     "Attempted to clean up logging when it wasn't initialized.";
 367
 368   CloseLogFile();
 369
 370   chrome_logging_initialized_ = false;
 371   chrome_logging_redirected_ = false;
 372 }
 373
 374 base::FilePath GetLogFileName() {
 375   std::string filename;
 376   scoped_ptr<base::Environment> env(base::Environment::Create());
 377   if (env->GetVar(env_vars::kLogFileName, &filename) && !filename.empty())
 378     return base::FilePath::FromUTF8Unsafe(filename);
 379
 380   const base::FilePath log_filename(FILE_PATH_LITERAL("chrome_debug.log"));
 381   base::FilePath log_path;
 382
 383   if (PathService::Get(chrome::DIR_LOGS, &log_path)) {
 384     log_path = log_path.Append(log_filename);
 385     return log_path;
 386   } else {
 387     // error with path service, just use some default file somewhere
 388     return log_filename;
 389   }
 390 }
 391
 392 bool DialogsAreSuppressed() {
 393   return dialogs_are_suppressed_;
 394 }
 395
 396 size_t GetFatalAssertions(AssertionList* assertions) {
 397   // In this function, we don't assume that assertions is non-null, so
 398   // that if you just want an assertion count, you can pass in NULL.
 399   if (assertions)
 400     assertions->clear();
 401   size_t assertion_count = 0;
 402
 403   std::ifstream log_file;
 404   log_file.open(GetLogFileName().value().c_str());
 405   if (!log_file.is_open())
 406     return 0;
 407
 408   std::string utf8_line;
 409   std::wstring wide_line;
 410   while (!log_file.eof()) {
 411     getline(log_file, utf8_line);
 412     if (utf8_line.find(":FATAL:") != std::string::npos) {
 413       wide_line = base::UTF8ToWide(utf8_line);
 414       if (assertions)
 415         assertions->push_back(wide_line);
 416       ++assertion_count;
 417     }
 418   }
 419   log_file.close();
 420
 421   return assertion_count;
 422 }
 423
 424 base::FilePath GenerateTimestampedName(const base::FilePath& base_path,
 425                                        base::Time timestamp) {
 426   base::Time::Exploded time_deets;
 427   timestamp.LocalExplode(&time_deets);
 428   std::string suffix = base::StringPrintf("_%02d%02d%02d-%02d%02d%02d",
 429                                           time_deets.year,
 430                                           time_deets.month,
 431                                           time_deets.day_of_month,
 432                                           time_deets.hour,
 433                                           time_deets.minute,
 434                                           time_deets.second);
 435   return base_path.InsertBeforeExtensionASCII(suffix);
 436 }
 437
 438 }  // namespace logging