includes/exception/MWExceptionHandler.php

   1 <?php
   2 /**
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  * http://www.gnu.org/copyleft/gpl.html
  17  *
  18  * @file
  19  */
  20
  21 use MediaWiki\Logger\LoggerFactory;
  22 use MediaWiki\MediaWikiServices;
  23 use Psr\Log\LogLevel;
  24 use Wikimedia\Rdbms\DBError;
  25
  26 /**
  27  * Handler class for MWExceptions
  28  * @ingroup Exception
  29  */
  30 class MWExceptionHandler {
  31         const CAUGHT_BY_HANDLER = 'mwe_handler'; // error reported by this exception handler
  32         const CAUGHT_BY_OTHER = 'other'; // error reported by direct logException() call
  33
  34         /**
  35          * @var string $reservedMemory
  36          */
  37         protected static $reservedMemory;
  38         /**
  39          * @var array $fatalErrorTypes
  40          */
  41         protected static $fatalErrorTypes = [
  42                 E_ERROR, E_PARSE, E_CORE_ERROR, E_COMPILE_ERROR, E_USER_ERROR,
  43                 /* HHVM's FATAL_ERROR level */ 16777217,
  44         ];
  45         /**
  46          * @var bool $handledFatalCallback
  47          */
  48         protected static $handledFatalCallback = false;
  49
  50         /**
  51          * Install handlers with PHP.
  52          */
  53         public static function installHandler() {
  54                 set_exception_handler( 'MWExceptionHandler::handleUncaughtException' );
  55                 set_error_handler( 'MWExceptionHandler::handleError' );
  56
  57                 // Reserve 16k of memory so we can report OOM fatals
  58                 self::$reservedMemory = str_repeat( ' ', 16384 );
  59                 register_shutdown_function( 'MWExceptionHandler::handleFatalError' );
  60         }
  61
  62         /**
  63          * Report an exception to the user
  64          * @param Exception|Throwable $e
  65          */
  66         protected static function report( $e ) {
  67                 try {
  68                         // Try and show the exception prettily, with the normal skin infrastructure
  69                         if ( $e instanceof MWException ) {
  70                                 // Delegate to MWException until all subclasses are handled by
  71                                 // MWExceptionRenderer and MWException::report() has been
  72                                 // removed.
  73                                 $e->report();
  74                         } else {
  75                                 MWExceptionRenderer::output( $e, MWExceptionRenderer::AS_PRETTY );
  76                         }
  77                 } catch ( Exception $e2 ) {
  78                         // Exception occurred from within exception handler
  79                         // Show a simpler message for the original exception,
  80                         // don't try to invoke report()
  81                         MWExceptionRenderer::output( $e, MWExceptionRenderer::AS_RAW, $e2 );
  82                 }
  83         }
  84
  85         /**
  86          * Roll back any open database transactions and log the stack trace of the exception
  87          *
  88          * This method is used to attempt to recover from exceptions
  89          *
  90          * @since 1.23
  91          * @param Exception|Throwable $e
  92          */
  93         public static function rollbackMasterChangesAndLog( $e ) {
  94                 $services = MediaWikiServices::getInstance();
  95                 if ( !$services->isServiceDisabled( 'DBLoadBalancerFactory' ) ) {
  96                         // Rollback DBs to avoid transaction notices. This might fail
  97                         // to rollback some databases due to connection issues or exceptions.
  98                         // However, any sane DB driver will rollback implicitly anyway.
  99                         try {
 100                                 $services->getDBLoadBalancerFactory()->rollbackMasterChanges( __METHOD__ );
 101                         } catch ( DBError $e2 ) {
 102                                 // If the DB is unreacheable, rollback() will throw an error
 103                                 // and the error report() method might need messages from the DB,
 104                                 // which would result in an exception loop. PHP may escalate such
 105                                 // errors to "Exception thrown without a stack frame" fatals, but
 106                                 // it's better to be explicit here.
 107                                 self::logException( $e2, self::CAUGHT_BY_HANDLER );
 108                         }
 109                 }
 110
 111                 self::logException( $e, self::CAUGHT_BY_HANDLER );
 112         }
 113
 114         /**
 115          * Callback to use with PHP's set_exception_handler.
 116          *
 117          * @since 1.31
 118          * @param Exception|Throwable $e
 119          */
 120         public static function handleUncaughtException( $e ) {
 121                 self::handleException( $e );
 122
 123                 // Make sure we don't claim success on exit for CLI scripts (T177414)
 124                 if ( wfIsCLI() ) {
 125                         register_shutdown_function(
 126                                 function () {
 127                                         exit( 255 );
 128                                 }
 129                         );
 130                 }
 131         }
 132
 133         /**
 134          * Exception handler which simulates the appropriate catch() handling:
 135          *
 136          *   try {
 137          *       ...
 138          *   } catch ( Exception $e ) {
 139          *       $e->report();
 140          *   } catch ( Exception $e ) {
 141          *       echo $e->__toString();
 142          *   }
 143          *
 144          * @since 1.25
 145          * @param Exception|Throwable $e
 146          */
 147         public static function handleException( $e ) {
 148                 self::rollbackMasterChangesAndLog( $e );
 149                 self::report( $e );
 150         }
 151
 152         /**
 153          * Handler for set_error_handler() callback notifications.
 154          *
 155          * Receive a callback from the interpreter for a raised error, create an
 156          * ErrorException, and log the exception to the 'error' logging
 157          * channel(s). If the raised error is a fatal error type (only under HHVM)
 158          * delegate to handleFatalError() instead.
 159          *
 160          * @since 1.25
 161          *
 162          * @param int $level Error level raised
 163          * @param string $message
 164          * @param string|null $file
 165          * @param int|null $line
 166          * @return bool
 167          *
 168          * @see logError()
 169          */
 170         public static function handleError(
 171                 $level, $message, $file = null, $line = null
 172         ) {
 173                 global $wgPropagateErrors;
 174
 175                 if ( in_array( $level, self::$fatalErrorTypes ) ) {
 176                         return self::handleFatalError( ...func_get_args() );
 177                 }
 178
 179                 // Map error constant to error name (reverse-engineer PHP error
 180                 // reporting)
 181                 switch ( $level ) {
 182                         case E_RECOVERABLE_ERROR:
 183                                 $levelName = 'Error';
 184                                 $severity = LogLevel::ERROR;
 185                                 break;
 186                         case E_WARNING:
 187                         case E_CORE_WARNING:
 188                         case E_COMPILE_WARNING:
 189                         case E_USER_WARNING:
 190                                 $levelName = 'Warning';
 191                                 $severity = LogLevel::WARNING;
 192                                 break;
 193                         case E_NOTICE:
 194                         case E_USER_NOTICE:
 195                                 $levelName = 'Notice';
 196                                 $severity = LogLevel::INFO;
 197                                 break;
 198                         case E_STRICT:
 199                                 $levelName = 'Strict Standards';
 200                                 $severity = LogLevel::DEBUG;
 201                                 break;
 202                         case E_DEPRECATED:
 203                         case E_USER_DEPRECATED:
 204                                 $levelName = 'Deprecated';
 205                                 $severity = LogLevel::INFO;
 206                                 break;
 207                         default:
 208                                 $levelName = 'Unknown error';
 209                                 $severity = LogLevel::ERROR;
 210                                 break;
 211                 }
 212
 213                 $e = new ErrorException( "PHP $levelName: $message", 0, $level, $file, $line );
 214                 self::logError( $e, 'error', $severity );
 215
 216                 // If $wgPropagateErrors is true return false so PHP shows/logs the error normally.
 217                 // Ignore $wgPropagateErrors if the error should break execution, or track_errors is set
 218                 // (which means someone is counting on regular PHP error handling behavior).
 219                 return !( $wgPropagateErrors || $level == E_RECOVERABLE_ERROR || ini_get( 'track_errors' ) );
 220         }
 221
 222         /**
 223          * Dual purpose callback used as both a set_error_handler() callback and
 224          * a registered shutdown function. Receive a callback from the interpreter
 225          * for a raised error or system shutdown, check for a fatal error, and log
 226          * to the 'fatal' logging channel.
 227          *
 228          * Special handling is included for missing class errors as they may
 229          * indicate that the user needs to install 3rd-party libraries via
 230          * Composer or other means.
 231          *
 232          * @since 1.25
 233          *
 234          * @param int|null $level Error level raised
 235          * @param string|null $message Error message
 236          * @param string|null $file File that error was raised in
 237          * @param int|null $line Line number error was raised at
 238          * @param array|null $context Active symbol table point of error
 239          * @param array|null $trace Backtrace at point of error (undocumented HHVM
 240          *     feature)
 241          * @return bool Always returns false
 242          */
 243         public static function handleFatalError(
 244                 $level = null, $message = null, $file = null, $line = null,
 245                 $context = null, $trace = null
 246         ) {
 247                 // Free reserved memory so that we have space to process OOM
 248                 // errors
 249                 self::$reservedMemory = null;
 250
 251                 if ( $level === null ) {
 252                         // Called as a shutdown handler, get data from error_get_last()
 253                         if ( static::$handledFatalCallback ) {
 254                                 // Already called once (probably as an error handler callback
 255                                 // under HHVM) so don't log again.
 256                                 return false;
 257                         }
 258
 259                         $lastError = error_get_last();
 260                         if ( $lastError !== null ) {
 261                                 $level = $lastError['type'];
 262                                 $message = $lastError['message'];
 263                                 $file = $lastError['file'];
 264                                 $line = $lastError['line'];
 265                         } else {
 266                                 $level = 0;
 267                                 $message = '';
 268                         }
 269                 }
 270
 271                 if ( !in_array( $level, self::$fatalErrorTypes ) ) {
 272                         // Only interested in fatal errors, others should have been
 273                         // handled by MWExceptionHandler::handleError
 274                         return false;
 275                 }
 276
 277                 $url = WebRequest::getGlobalRequestURL();
 278                 $msgParts = [
 279                         '[{exception_id}] {exception_url}   PHP Fatal Error',
 280                         ( $line || $file ) ? ' from' : '',
 281                         $line ? " line $line" : '',
 282                         ( $line && $file ) ? ' of' : '',
 283                         $file ? " $file" : '',
 284                         ": $message",
 285                 ];
 286                 $msg = implode( '', $msgParts );
 287
 288                 // Look at message to see if this is a class not found failure
 289                 // HHVM: Class undefined: foo
 290                 // PHP5: Class 'foo' not found
 291                 if ( preg_match( "/Class (undefined: \w+|'\w+' not found)/", $message ) ) {
 292                         // phpcs:disable Generic.Files.LineLength
 293                         $msg = <<<TXT
 294 {$msg}
 295
 296 MediaWiki or an installed extension requires this class but it is not embedded directly in MediaWiki's git repository and must be installed separately by the end user.
 297
 298 Please see <a href="https://www.mediawiki.org/wiki/Download_from_Git#Fetch_external_libraries">mediawiki.org</a> for help on installing the required components.
 299 TXT;
 300                         // phpcs:enable
 301                 }
 302
 303                 // We can't just create an exception and log it as it is likely that
 304                 // the interpreter has unwound the stack already. If that is true the
 305                 // stacktrace we would get would be functionally empty. If however we
 306                 // have been called as an error handler callback *and* HHVM is in use
 307                 // we will have been provided with a useful stacktrace that we can
 308                 // log.
 309                 $trace = $trace ?: debug_backtrace();
 310                 $logger = LoggerFactory::getInstance( 'fatal' );
 311                 $logger->error( $msg, [
 312                         'fatal_exception' => [
 313                                 'class' => ErrorException::class,
 314                                 'message' => "PHP Fatal Error: {$message}",
 315                                 'code' => $level,
 316                                 'file' => $file,
 317                                 'line' => $line,
 318                                 'trace' => self::prettyPrintTrace( self::redactTrace( $trace ) ),
 319                         ],
 320                         'exception_id' => WebRequest::getRequestId(),
 321                         'exception_url' => $url,
 322                         'caught_by' => self::CAUGHT_BY_HANDLER
 323                 ] );
 324
 325                 // Remember call so we don't double process via HHVM's fatal
 326                 // notifications and the shutdown hook behavior
 327                 static::$handledFatalCallback = true;
 328                 return false;
 329         }
 330
 331         /**
 332          * Generate a string representation of an exception's stack trace
 333          *
 334          * Like Exception::getTraceAsString, but replaces argument values with
 335          * argument type or class name.
 336          *
 337          * @param Exception|Throwable $e
 338          * @return string
 339          * @see prettyPrintTrace()
 340          */
 341         public static function getRedactedTraceAsString( $e ) {
 342                 return self::prettyPrintTrace( self::getRedactedTrace( $e ) );
 343         }
 344
 345         /**
 346          * Generate a string representation of a stacktrace.
 347          *
 348          * @param array $trace
 349          * @param string $pad Constant padding to add to each line of trace
 350          * @return string
 351          * @since 1.26
 352          */
 353         public static function prettyPrintTrace( array $trace, $pad = '' ) {
 354                 $text = '';
 355
 356                 $level = 0;
 357                 foreach ( $trace as $level => $frame ) {
 358                         if ( isset( $frame['file'] ) && isset( $frame['line'] ) ) {
 359                                 $text .= "{$pad}#{$level} {$frame['file']}({$frame['line']}): ";
 360                         } else {
 361                                 // 'file' and 'line' are unset for calls via call_user_func
 362                                 // (T57634) This matches behaviour of
 363                                 // Exception::getTraceAsString to instead display "[internal
 364                                 // function]".
 365                                 $text .= "{$pad}#{$level} [internal function]: ";
 366                         }
 367
 368                         if ( isset( $frame['class'] ) && isset( $frame['type'] ) && isset( $frame['function'] ) ) {
 369                                 $text .= $frame['class'] . $frame['type'] . $frame['function'];
 370                         } elseif ( isset( $frame['function'] ) ) {
 371                                 $text .= $frame['function'];
 372                         } else {
 373                                 $text .= 'NO_FUNCTION_GIVEN';
 374                         }
 375
 376                         if ( isset( $frame['args'] ) ) {
 377                                 $text .= '(' . implode( ', ', $frame['args'] ) . ")\n";
 378                         } else {
 379                                 $text .= "()\n";
 380                         }
 381                 }
 382
 383                 $level = $level + 1;
 384                 $text .= "{$pad}#{$level} {main}";
 385
 386                 return $text;
 387         }
 388
 389         /**
 390          * Return a copy of an exception's backtrace as an array.
 391          *
 392          * Like Exception::getTrace, but replaces each element in each frame's
 393          * argument array with the name of its class (if the element is an object)
 394          * or its type (if the element is a PHP primitive).
 395          *
 396          * @since 1.22
 397          * @param Exception|Throwable $e
 398          * @return array
 399          */
 400         public static function getRedactedTrace( $e ) {
 401                 return static::redactTrace( $e->getTrace() );
 402         }
 403
 404         /**
 405          * Redact a stacktrace generated by Exception::getTrace(),
 406          * debug_backtrace() or similar means. Replaces each element in each
 407          * frame's argument array with the name of its class (if the element is an
 408          * object) or its type (if the element is a PHP primitive).
 409          *
 410          * @since 1.26
 411          * @param array $trace Stacktrace
 412          * @return array Stacktrace with arugment values converted to data types
 413          */
 414         public static function redactTrace( array $trace ) {
 415                 return array_map( function ( $frame ) {
 416                         if ( isset( $frame['args'] ) ) {
 417                                 $frame['args'] = array_map( function ( $arg ) {
 418                                         return is_object( $arg ) ? get_class( $arg ) : gettype( $arg );
 419                                 }, $frame['args'] );
 420                         }
 421                         return $frame;
 422                 }, $trace );
 423         }
 424
 425         /**
 426          * Get the ID for this exception.
 427          *
 428          * The ID is saved so that one can match the one output to the user (when
 429          * $wgShowExceptionDetails is set to false), to the entry in the debug log.
 430          *
 431          * @since 1.22
 432          * @deprecated since 1.27: Exception IDs are synonymous with request IDs.
 433          * @param Exception|Throwable $e
 434          * @return string
 435          */
 436         public static function getLogId( $e ) {
 437                 wfDeprecated( __METHOD__, '1.27' );
 438                 return WebRequest::getRequestId();
 439         }
 440
 441         /**
 442          * If the exception occurred in the course of responding to a request,
 443          * returns the requested URL. Otherwise, returns false.
 444          *
 445          * @since 1.23
 446          * @return string|false
 447          */
 448         public static function getURL() {
 449                 global $wgRequest;
 450                 if ( !isset( $wgRequest ) || $wgRequest instanceof FauxRequest ) {
 451                         return false;
 452                 }
 453                 return $wgRequest->getRequestURL();
 454         }
 455
 456         /**
 457          * Get a message formatting the exception message and its origin.
 458          *
 459          * @since 1.22
 460          * @param Exception|Throwable $e
 461          * @return string
 462          */
 463         public static function getLogMessage( $e ) {
 464                 $id = WebRequest::getRequestId();
 465                 $type = get_class( $e );
 466                 $file = $e->getFile();
 467                 $line = $e->getLine();
 468                 $message = $e->getMessage();
 469                 $url = self::getURL() ?: '[no req]';
 470
 471                 return "[$id] $url   $type from line $line of $file: $message";
 472         }
 473
 474         /**
 475          * Get a normalised message for formatting with PSR-3 log event context.
 476          *
 477          * Must be used together with `getLogContext()` to be useful.
 478          *
 479          * @since 1.30
 480          * @param Exception|Throwable $e
 481          * @return string
 482          */
 483         public static function getLogNormalMessage( $e ) {
 484                 $type = get_class( $e );
 485                 $file = $e->getFile();
 486                 $line = $e->getLine();
 487                 $message = $e->getMessage();
 488
 489                 return "[{exception_id}] {exception_url}   $type from line $line of $file: $message";
 490         }
 491
 492         /**
 493          * @param Exception|Throwable $e
 494          * @return string
 495          */
 496         public static function getPublicLogMessage( $e ) {
 497                 $reqId = WebRequest::getRequestId();
 498                 $type = get_class( $e );
 499                 return '[' . $reqId . '] '
 500                         . gmdate( 'Y-m-d H:i:s' ) . ': '
 501                         . 'Fatal exception of type "' . $type . '"';
 502         }
 503
 504         /**
 505          * Get a PSR-3 log event context from an Exception.
 506          *
 507          * Creates a structured array containing information about the provided
 508          * exception that can be used to augment a log message sent to a PSR-3
 509          * logger.
 510          *
 511          * @param Exception|Throwable $e
 512          * @param string $catcher CAUGHT_BY_* class constant indicating what caught the error
 513          * @return array
 514          */
 515         public static function getLogContext( $e, $catcher = self::CAUGHT_BY_OTHER ) {
 516                 return [
 517                         'exception' => $e,
 518                         'exception_id' => WebRequest::getRequestId(),
 519                         'exception_url' => self::getURL() ?: '[no req]',
 520                         'caught_by' => $catcher
 521                 ];
 522         }
 523
 524         /**
 525          * Get a structured representation of an Exception.
 526          *
 527          * Returns an array of structured data (class, message, code, file,
 528          * backtrace) derived from the given exception. The backtrace information
 529          * will be redacted as per getRedactedTraceAsArray().
 530          *
 531          * @param Exception|Throwable $e
 532          * @param string $catcher CAUGHT_BY_* class constant indicating what caught the error
 533          * @return array
 534          * @since 1.26
 535          */
 536         public static function getStructuredExceptionData( $e, $catcher = self::CAUGHT_BY_OTHER ) {
 537                 global $wgLogExceptionBacktrace;
 538
 539                 $data = [
 540                         'id' => WebRequest::getRequestId(),
 541                         'type' => get_class( $e ),
 542                         'file' => $e->getFile(),
 543                         'line' => $e->getLine(),
 544                         'message' => $e->getMessage(),
 545                         'code' => $e->getCode(),
 546                         'url' => self::getURL() ?: null,
 547                         'caught_by' => $catcher
 548                 ];
 549
 550                 if ( $e instanceof ErrorException &&
 551                         ( error_reporting() & $e->getSeverity() ) === 0
 552                 ) {
 553                         // Flag surpressed errors
 554                         $data['suppressed'] = true;
 555                 }
 556
 557                 if ( $wgLogExceptionBacktrace ) {
 558                         $data['backtrace'] = self::getRedactedTrace( $e );
 559                 }
 560
 561                 $previous = $e->getPrevious();
 562                 if ( $previous !== null ) {
 563                         $data['previous'] = self::getStructuredExceptionData( $previous, $catcher );
 564                 }
 565
 566                 return $data;
 567         }
 568
 569         /**
 570          * Serialize an Exception object to JSON.
 571          *
 572          * The JSON object will have keys 'id', 'file', 'line', 'message', and
 573          * 'url'. These keys map to string values, with the exception of 'line',
 574          * which is a number, and 'url', which may be either a string URL or or
 575          * null if the exception did not occur in the context of serving a web
 576          * request.
 577          *
 578          * If $wgLogExceptionBacktrace is true, it will also have a 'backtrace'
 579          * key, mapped to the array return value of Exception::getTrace, but with
 580          * each element in each frame's "args" array (if set) replaced with the
 581          * argument's class name (if the argument is an object) or type name (if
 582          * the argument is a PHP primitive).
 583          *
 584          * @par Sample JSON record ($wgLogExceptionBacktrace = false):
 585          * @code
 586          *  {
 587          *    "id": "c41fb419",
 588          *    "type": "MWException",
 589          *    "file": "/var/www/mediawiki/includes/cache/MessageCache.php",
 590          *    "line": 704,
 591          *    "message": "Non-string key given",
 592          *    "url": "/wiki/Main_Page"
 593          *  }
 594          * @endcode
 595          *
 596          * @par Sample JSON record ($wgLogExceptionBacktrace = true):
 597          * @code
 598          *  {
 599          *    "id": "dc457938",
 600          *    "type": "MWException",
 601          *    "file": "/vagrant/mediawiki/includes/cache/MessageCache.php",
 602          *    "line": 704,
 603          *    "message": "Non-string key given",
 604          *    "url": "/wiki/Main_Page",
 605          *    "backtrace": [{
 606          *      "file": "/vagrant/mediawiki/extensions/VisualEditor/VisualEditor.hooks.php",
 607          *      "line": 80,
 608          *      "function": "get",
 609          *      "class": "MessageCache",
 610          *      "type": "->",
 611          *      "args": ["array"]
 612          *    }]
 613          *  }
 614          * @endcode
 615          *
 616          * @since 1.23
 617          * @param Exception|Throwable $e
 618          * @param bool $pretty Add non-significant whitespace to improve readability (default: false).
 619          * @param int $escaping Bitfield consisting of FormatJson::.*_OK class constants.
 620          * @param string $catcher CAUGHT_BY_* class constant indicating what caught the error
 621          * @return string|false JSON string if successful; false upon failure
 622          */
 623         public static function jsonSerializeException(
 624                 $e, $pretty = false, $escaping = 0, $catcher = self::CAUGHT_BY_OTHER
 625         ) {
 626                 return FormatJson::encode(
 627                         self::getStructuredExceptionData( $e, $catcher ),
 628                         $pretty,
 629                         $escaping
 630                 );
 631         }
 632
 633         /**
 634          * Log an exception to the exception log (if enabled).
 635          *
 636          * This method must not assume the exception is an MWException,
 637          * it is also used to handle PHP exceptions or exceptions from other libraries.
 638          *
 639          * @since 1.22
 640          * @param Exception|Throwable $e
 641          * @param string $catcher CAUGHT_BY_* class constant indicating what caught the error
 642          */
 643         public static function logException( $e, $catcher = self::CAUGHT_BY_OTHER ) {
 644                 if ( !( $e instanceof MWException ) || $e->isLoggable() ) {
 645                         $logger = LoggerFactory::getInstance( 'exception' );
 646                         $logger->error(
 647                                 self::getLogNormalMessage( $e ),
 648                                 self::getLogContext( $e, $catcher )
 649                         );
 650
 651                         $json = self::jsonSerializeException( $e, false, FormatJson::ALL_OK, $catcher );
 652                         if ( $json !== false ) {
 653                                 $logger = LoggerFactory::getInstance( 'exception-json' );
 654                                 $logger->error( $json, [ 'private' => true ] );
 655                         }
 656
 657                         Hooks::run( 'LogException', [ $e, false ] );
 658                 }
 659         }
 660
 661         /**
 662          * Log an exception that wasn't thrown but made to wrap an error.
 663          *
 664          * @since 1.25
 665          * @param ErrorException $e
 666          * @param string $channel
 667          * @param string $level
 668          */
 669         protected static function logError(
 670                 ErrorException $e, $channel, $level = LogLevel::ERROR
 671         ) {
 672                 $catcher = self::CAUGHT_BY_HANDLER;
 673                 // The set_error_handler callback is independent from error_reporting.
 674                 // Filter out unwanted errors manually (e.g. when
 675                 // Wikimedia\suppressWarnings is active).
 676                 $suppressed = ( error_reporting() & $e->getSeverity() ) === 0;
 677                 if ( !$suppressed ) {
 678                         $logger = LoggerFactory::getInstance( $channel );
 679                         $logger->log(
 680                                 $level,
 681                                 self::getLogNormalMessage( $e ),
 682                                 self::getLogContext( $e, $catcher )
 683                         );
 684                 }
 685
 686                 // Include all errors in the json log (surpressed errors will be flagged)
 687                 $json = self::jsonSerializeException( $e, false, FormatJson::ALL_OK, $catcher );
 688                 if ( $json !== false ) {
 689                         $logger = LoggerFactory::getInstance( "{$channel}-json" );
 690                         $logger->log( $level, $json, [ 'private' => true ] );
 691                 }
 692
 693                 Hooks::run( 'LogException', [ $e, $suppressed ] );
 694         }
 695 }