/**
* 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'])) {
// @codingStandardsIgnoreStart Generic.Files.LineLength.TooLong
$msg = <<<TXT
{$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;
// @codingStandardsIgnoreEnd
}
$e = new ErrorException($msg, 0, $lastError['type']);
self::logError($e, 'fatal');
}
}
/**
* Dual purpose callback used as both a set_error_handler() callback and
* a registered shutdown function. Receive a callback from the interpreter
* for a raised error or system shutdown, check for a fatal error, and log
* to the 'fatal' logging channel.
*
* 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
*
* @param int $level Error level raised
* @param string $message Error message
* @param string $file File that error was raised in
* @param int $line Line number error was raised at
* @param array $context Active symbol table point of error
* @param array $trace Backtrace at point of error (undocumented HHVM
* feature)
* @return bool Always returns false
*/
public static function handleFatalError($level = null, $message = null, $file = null, $line = null, $context = null, $trace = null)
{
// Free reserved memory so that we have space to process OOM
// errors
self::$reservedMemory = null;
if ($level === null) {
// Called as a shutdown handler, get data from error_get_last()
if (static::$handledFatalCallback) {
// Already called once (probably as an error handler callback
// under HHVM) so don't log again.
return false;
}
$lastError = error_get_last();
if ($lastError !== null) {
$level = $lastError['type'];
$message = $lastError['message'];
$file = $lastError['file'];
$line = $lastError['line'];
} else {
$level = 0;
$message = '';
}
}
if (!in_array($level, self::$fatalErrorTypes)) {
// Only interested in fatal errors, others should have been
// handled by MWExceptionHandler::handleError
return false;
}
$msg = "[{exception_id}] PHP Fatal Error: {$message}";
// Look at message to see if this is a class not found failure
// HHVM: Class undefined: foo
// PHP5: Class 'foo' not found
if (preg_match("/Class (undefined: \\w+|'\\w+' not found)/", $msg)) {
// @codingStandardsIgnoreStart Generic.Files.LineLength.TooLong
$msg = <<<TXT
{$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;
// @codingStandardsIgnoreEnd
}
// We can't just create an exception and log it as it is likely that
// the interpreter has unwound the stack already. If that is true the
// stacktrace we would get would be functionally empty. If however we
// have been called as an error handler callback *and* HHVM is in use
// we will have been provided with a useful stacktrace that we can
// log.
$trace = $trace ?: debug_backtrace();
$logger = LoggerFactory::getInstance('fatal');
$logger->error($msg, ['exception' => ['class' => 'ErrorException', 'message' => "PHP Fatal Error: {$message}", 'code' => $level, 'file' => $file, 'line' => $line, 'trace' => static::redactTrace($trace)], 'exception_id' => wfRandomString(8)]);
// Remember call so we don't double process via HHVM's fatal
// notifications and the shutdown hook behavior
static::$handledFatalCallback = true;
return false;
}
