* @ingroup Exception
*/
class MWExceptionHandler {
+
+ protected static $reservedMemory;
+ protected static $fatalErrorTypes = array(
+ E_ERROR, E_PARSE, E_CORE_ERROR, E_COMPILE_ERROR, E_USER_ERROR,
+ /* HHVM's FATAL_ERROR level */ 16777217,
+ );
+
/**
- * Install an exception handler for MediaWiki exception types.
+ * Install handlers with PHP.
*/
public static function installHandler() {
- set_exception_handler( array( 'MWExceptionHandler', 'handle' ) );
+ set_exception_handler( array( 'MWExceptionHandler', 'handleException' ) );
+ set_error_handler( array( 'MWExceptionHandler', 'handleError' ) );
+
+ // Reserve 16k of memory so we can report OOM fatals
+ self::$reservedMemory = str_repeat( ' ', 16384 );
+ register_shutdown_function(
+ array( 'MWExceptionHandler', 'handleFatalError' )
+ );
}
/**
$e->report();
} catch ( Exception $e2 ) {
// Exception occurred from within exception handler
- // Show a simpler error message for the original exception,
+ // Show a simpler message for the original exception,
// don't try to invoke report()
$message = "MediaWiki internal error.\n\n";
echo nl2br( htmlspecialchars( $message ) ) . "\n";
}
- self::logException( $e );
}
}
* If there are any open database transactions, roll them back and log
* the stack trace of the exception that should have been caught so the
* transaction could be aborted properly.
+ *
* @since 1.23
* @param Exception $e
*/
* } catch ( Exception $e ) {
* echo $e->__toString();
* }
+ *
+ * @since 1.25
* @param Exception $e
*/
- public static function handle( $e ) {
+ public static function handleException( $e ) {
global $wgFullyInitialised;
self::rollbackMasterChangesAndLog( $e );
-
+ self::logException( $e );
self::report( $e );
// Final cleanup
exit( 1 );
}
+ /**
+ * @since 1.25
+ * @param int $level Error level raised
+ * @param string $message
+ * @param string $file
+ * @param int $line
+ */
+ public static function handleError( $level, $message, $file = null, $line = null ) {
+ // Map error constant to error name (reverse-engineer PHP error reporting)
+ switch ( $level ) {
+ case E_ERROR:
+ case E_CORE_ERROR:
+ case E_COMPILE_ERROR:
+ case E_USER_ERROR:
+ case E_RECOVERABLE_ERROR:
+ case E_PARSE:
+ $levelName = 'Error';
+ break;
+ case E_WARNING:
+ case E_CORE_WARNING:
+ case E_COMPILE_WARNING:
+ case E_USER_WARNING:
+ $levelName = 'Warning';
+ break;
+ case E_NOTICE:
+ case E_USER_NOTICE:
+ $levelName = 'Notice';
+ break;
+ case E_STRICT:
+ $levelName = 'Strict Standards';
+ break;
+ case E_DEPRECATED:
+ case E_USER_DEPRECATED:
+ $levelName = 'Deprecated';
+ break;
+ case /* HHVM's FATAL_ERROR */ 16777217:
+ $levelName = 'Fatal';
+ break;
+ default:
+ $levelName = 'Unknown error';
+ break;
+ }
+
+ $e = new ErrorException( "PHP $levelName: $message", 0, $level, $file, $line );
+ self::logError( $e );
+
+ // This handler is for logging only. Return false will instruct PHP
+ // to continue regular handling.
+ return false;
+ }
+
+
+ /**
+ * Look for a fatal error as the cause of the request termination and log
+ * as an exception.
+ *
+ * Special handling is included for missing class errors as they may
+ * indicate that the user needs to install 3rd-party libraries via
+ * Composer or other means.
+ *
+ * @since 1.25
+ */
+ public static function handleFatalError() {
+ self::$reservedMemory = null;
+ $lastError = error_get_last();
+
+ if ( $lastError &&
+ isset( $lastError['type'] ) &&
+ in_array( $lastError['type'], self::$fatalErrorTypes )
+ ) {
+ $msg = "Fatal Error: {$lastError['message']}";
+ // HHVM: Class undefined: foo
+ // PHP5: Class 'foo' not found
+ if ( preg_match( "/Class (undefined: \w+|'\w+' not found)/",
+ $lastError['message']
+ ) ) {
+ $msg = <<<TXT
+{$msg}
+
+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.
+
+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.
+TXT;
+ }
+ $e = new ErrorException( $msg, 0, $lastError['type'] );
+ self::logError( $e );
+ }
+ }
+
/**
* Generate a string representation of an exception's stack trace
*
}
/**
- * Get the ID for this error.
+ * 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.
}
/**
- * Return the requested URL and point to file and line number from which the
- * exception occurred.
+ * Get a message formatting the exception message and its origin.
*
* @since 1.22
* @param Exception $e
*/
public static function getLogMessage( Exception $e ) {
$id = self::getLogId( $e );
+ $type = get_class( $e );
$file = $e->getFile();
$line = $e->getLine();
$message = $e->getMessage();
$url = self::getURL() ?: '[no req]';
- return "[$id] $url Exception from line $line of $file: $message";
+ return "[$id] $url $type from line $line of $file: $message";
}
/**
* @code
* {
* "id": "c41fb419",
+ * "type": "MWException",
* "file": "/var/www/mediawiki/includes/cache/MessageCache.php",
* "line": 704,
* "message": "Non-string key given",
* @code
* {
* "id": "dc457938",
+ * "type": "MWException",
* "file": "/vagrant/mediawiki/includes/cache/MessageCache.php",
* "line": 704,
* "message": "Non-string key given",
$exceptionData = array(
'id' => self::getLogId( $e ),
+ 'type' => get_class( $e ),
'file' => $e->getFile(),
'line' => $e->getLine(),
'message' => $e->getMessage(),
* Log an exception to the exception log (if enabled).
*
* This method must not assume the exception is an MWException,
- * it is also used to handle PHP errors or errors from other libraries.
+ * it is also used to handle PHP exceptions or exceptions from other libraries.
*
* @since 1.22
* @param Exception $e
wfDebugLog( 'exception-json', $json, 'private' );
}
}
-
}
+ /**
+ * Log an exception that wasn't thrown but made to wrap an error.
+ *
+ * @since 1.25
+ * @param Exception $e
+ */
+ protected static function logError( Exception $e ) {
+ global $wgLogExceptionBacktrace;
+
+ $log = self::getLogMessage( $e );
+ if ( $wgLogExceptionBacktrace ) {
+ wfDebugLog( 'error', $log . "\n" . $e->getTraceAsString() );
+ } else {
+ wfDebugLog( 'error', $log );
+ }
+ }
}
dépôts / lhc / web / wiklou.git / blobdiff