* @var string $reservedMemory
*/
protected static $reservedMemory;
+
/**
+ * Error types that, if unhandled, are fatal to the request.
+ *
+ * On PHP 7, these error types may be thrown as Error objects, which
+ * implement Throwable (but not Exception).
+ *
+ * On HHVM, these invoke the set_error_handler callback, similar to how
+ * (non-fatal) warnings and notices are reported, except that after this
+ * handler runs for fatal error tpyes, script execution stops!
+ *
+ * The user will be shown an HTTP 500 Internal Server Error.
+ * As such, these should be sent to MediaWiki's "fatal" or "exception"
+ * channel. Normally, the error handler logs them to the "error" channel.
+ *
* @var array $fatalErrorTypes
*/
protected static $fatalErrorTypes = [
- E_ERROR, E_PARSE, E_CORE_ERROR, E_COMPILE_ERROR, E_USER_ERROR,
- /* HHVM's FATAL_ERROR level */ 16777217,
+ E_ERROR,
+ E_PARSE,
+ E_CORE_ERROR,
+ E_COMPILE_ERROR,
+ E_USER_ERROR,
+
+ // E.g. "Catchable fatal error: Argument X must be Y, null given"
+ E_RECOVERABLE_ERROR,
+
+ // HHVM's FATAL_ERROR constant
+ 16777217,
];
/**
* @var bool $handledFatalCallback
* Install handlers with PHP.
*/
public static function installHandler() {
+ // This catches:
+ // * Exception objects that were explicitly thrown but not
+ // caught anywhere in the application. This is rare given those
+ // would normally be caught at a high-level like MediaWiki::run (index.php),
+ // api.php, or ResourceLoader::respond (load.php). These high-level
+ // catch clauses would then call MWExceptionHandler::logException
+ // or MWExceptionHandler::handleException.
+ // If they are not caught, then they are handled here.
+ // * Error objects (on PHP 7+), for issues that would historically
+ // cause fatal errors but may now be caught as Throwable (not Exception).
+ // Same as previous case, but more common to bubble to here instead of
+ // caught locally because they tend to not be safe to recover from.
+ // (e.g. argument TypeErorr, devision by zero, etc.)
set_exception_handler( 'MWExceptionHandler::handleUncaughtException' );
+
+ // This catches:
+ // * Non-fatal errors (e.g. PHP Notice, PHP Warning, PHP Error) that do not
+ // interrupt execution in any way. We log these in the background and then
+ // continue execution.
+ // * Fatal errors (on HHVM in PHP5 mode) where PHP 7 would throw Throwable.
set_error_handler( 'MWExceptionHandler::handleError' );
+ // This catches:
+ // * Fatal error for which no Throwable is thrown (PHP 7), and no Error emitted (HHVM).
+ // This includes Out-Of-Memory and Timeout fatals.
+ //
// Reserve 16k of memory so we can report OOM fatals
self::$reservedMemory = str_repeat( ' ', 16384 );
register_shutdown_function( 'MWExceptionHandler::handleFatalError' );
// behaviour given the null was not part of the code and is likely not
// accounted for.
switch ( $level ) {
- case E_RECOVERABLE_ERROR:
- $levelName = 'Error';
- $severity = LogLevel::ERROR;
- break;
case E_WARNING:
case E_CORE_WARNING:
case E_COMPILE_WARNING:
$levelName = 'Notice';
$severity = LogLevel::ERROR;
break;
- case E_USER_WARNING:
case E_USER_NOTICE:
+ // Used by wfWarn(), MWDebug::warning()
+ $levelName = 'Notice';
+ $severity = LogLevel::WARNING;
+ break;
+ case E_USER_WARNING:
// Used by wfWarn(), MWDebug::warning()
$levelName = 'Warning';
$severity = LogLevel::WARNING;
self::logError( $e, 'error', $severity );
// If $wgPropagateErrors is true return false so PHP shows/logs the error normally.
- // Ignore $wgPropagateErrors if the error should break execution, or track_errors is set
+ // Ignore $wgPropagateErrors if track_errors is set
// (which means someone is counting on regular PHP error handling behavior).
- return !( $wgPropagateErrors || $level == E_RECOVERABLE_ERROR || ini_get( 'track_errors' ) );
+ return !( $wgPropagateErrors || ini_get( 'track_errors' ) );
}
/**
}, $trace );
}
- /**
- * Get the ID for this exception.
- *
- * The ID is saved so that one can match the one output to the user (when
- * $wgShowExceptionDetails is set to false), to the entry in the debug log.
- *
- * @since 1.22
- * @deprecated since 1.27: Exception IDs are synonymous with request IDs.
- * @param Exception|Throwable $e
- * @return string
- */
- public static function getLogId( $e ) {
- wfDeprecated( __METHOD__, '1.27' );
- return WebRequest::getRequestId();
- }
-
/**
* If the exception occurred in the course of responding to a request,
* returns the requested URL. Otherwise, returns false.
dépôts / lhc / web / wiklou.git / blobdiff