Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\Debug;
Chris@0: 
Chris@17: use Psr\Log\LoggerInterface;
Chris@0: use Psr\Log\LogLevel;
Chris@0: use Symfony\Component\Debug\Exception\ContextErrorException;
Chris@0: use Symfony\Component\Debug\Exception\FatalErrorException;
Chris@0: use Symfony\Component\Debug\Exception\FatalThrowableError;
Chris@0: use Symfony\Component\Debug\Exception\OutOfMemoryException;
Chris@0: use Symfony\Component\Debug\Exception\SilencedErrorContext;
Chris@17: use Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler;
Chris@17: use Symfony\Component\Debug\FatalErrorHandler\FatalErrorHandlerInterface;
Chris@0: use Symfony\Component\Debug\FatalErrorHandler\UndefinedFunctionFatalErrorHandler;
Chris@0: use Symfony\Component\Debug\FatalErrorHandler\UndefinedMethodFatalErrorHandler;
Chris@0: 
Chris@0: /**
Chris@0:  * A generic ErrorHandler for the PHP engine.
Chris@0:  *
Chris@0:  * Provides five bit fields that control how errors are handled:
Chris@0:  * - thrownErrors: errors thrown as \ErrorException
Chris@0:  * - loggedErrors: logged errors, when not @-silenced
Chris@0:  * - scopedErrors: errors thrown or logged with their local context
Chris@0:  * - tracedErrors: errors logged with their stack trace
Chris@0:  * - screamedErrors: never @-silenced errors
Chris@0:  *
Chris@0:  * Each error level can be logged by a dedicated PSR-3 logger object.
Chris@0:  * Screaming only applies to logging.
Chris@0:  * Throwing takes precedence over logging.
Chris@0:  * Uncaught exceptions are logged as E_ERROR.
Chris@0:  * E_DEPRECATED and E_USER_DEPRECATED levels never throw.
Chris@0:  * E_RECOVERABLE_ERROR and E_USER_ERROR levels always throw.
Chris@0:  * Non catchable errors that can be detected at shutdown time are logged when the scream bit field allows so.
Chris@0:  * As errors have a performance cost, repeated errors are all logged, so that the developer
Chris@0:  * can see them and weight them as more important to fix than others of the same level.
Chris@0:  *
Chris@0:  * @author Nicolas Grekas <p@tchwork.com>
Chris@0:  * @author Grégoire Pineau <lyrixx@lyrixx.info>
Chris@0:  */
Chris@0: class ErrorHandler
Chris@0: {
Chris@17:     private $levels = [
Chris@0:         E_DEPRECATED => 'Deprecated',
Chris@0:         E_USER_DEPRECATED => 'User Deprecated',
Chris@0:         E_NOTICE => 'Notice',
Chris@0:         E_USER_NOTICE => 'User Notice',
Chris@0:         E_STRICT => 'Runtime Notice',
Chris@0:         E_WARNING => 'Warning',
Chris@0:         E_USER_WARNING => 'User Warning',
Chris@0:         E_COMPILE_WARNING => 'Compile Warning',
Chris@0:         E_CORE_WARNING => 'Core Warning',
Chris@0:         E_USER_ERROR => 'User Error',
Chris@0:         E_RECOVERABLE_ERROR => 'Catchable Fatal Error',
Chris@0:         E_COMPILE_ERROR => 'Compile Error',
Chris@0:         E_PARSE => 'Parse Error',
Chris@0:         E_ERROR => 'Error',
Chris@0:         E_CORE_ERROR => 'Core Error',
Chris@17:     ];
Chris@0: 
Chris@17:     private $loggers = [
Chris@17:         E_DEPRECATED => [null, LogLevel::INFO],
Chris@17:         E_USER_DEPRECATED => [null, LogLevel::INFO],
Chris@17:         E_NOTICE => [null, LogLevel::WARNING],
Chris@17:         E_USER_NOTICE => [null, LogLevel::WARNING],
Chris@17:         E_STRICT => [null, LogLevel::WARNING],
Chris@17:         E_WARNING => [null, LogLevel::WARNING],
Chris@17:         E_USER_WARNING => [null, LogLevel::WARNING],
Chris@17:         E_COMPILE_WARNING => [null, LogLevel::WARNING],
Chris@17:         E_CORE_WARNING => [null, LogLevel::WARNING],
Chris@17:         E_USER_ERROR => [null, LogLevel::CRITICAL],
Chris@17:         E_RECOVERABLE_ERROR => [null, LogLevel::CRITICAL],
Chris@17:         E_COMPILE_ERROR => [null, LogLevel::CRITICAL],
Chris@17:         E_PARSE => [null, LogLevel::CRITICAL],
Chris@17:         E_ERROR => [null, LogLevel::CRITICAL],
Chris@17:         E_CORE_ERROR => [null, LogLevel::CRITICAL],
Chris@17:     ];
Chris@0: 
Chris@0:     private $thrownErrors = 0x1FFF; // E_ALL - E_DEPRECATED - E_USER_DEPRECATED
Chris@0:     private $scopedErrors = 0x1FFF; // E_ALL - E_DEPRECATED - E_USER_DEPRECATED
Chris@0:     private $tracedErrors = 0x77FB; // E_ALL - E_STRICT - E_PARSE
Chris@0:     private $screamedErrors = 0x55; // E_ERROR + E_CORE_ERROR + E_COMPILE_ERROR + E_PARSE
Chris@0:     private $loggedErrors = 0;
Chris@0:     private $traceReflector;
Chris@0: 
Chris@0:     private $isRecursive = 0;
Chris@0:     private $isRoot = false;
Chris@0:     private $exceptionHandler;
Chris@0:     private $bootstrappingLogger;
Chris@0: 
Chris@0:     private static $reservedMemory;
Chris@17:     private static $stackedErrors = [];
Chris@17:     private static $stackedErrorLevels = [];
Chris@0:     private static $toStringException = null;
Chris@17:     private static $silencedErrorCache = [];
Chris@12:     private static $silencedErrorCount = 0;
Chris@0:     private static $exitCode = 0;
Chris@0: 
Chris@0:     /**
Chris@0:      * Registers the error handler.
Chris@0:      *
Chris@0:      * @param self|null $handler The handler to register
Chris@0:      * @param bool      $replace Whether to replace or not any existing handler
Chris@0:      *
Chris@0:      * @return self The registered error handler
Chris@0:      */
Chris@0:     public static function register(self $handler = null, $replace = true)
Chris@0:     {
Chris@0:         if (null === self::$reservedMemory) {
Chris@0:             self::$reservedMemory = str_repeat('x', 10240);
Chris@0:             register_shutdown_function(__CLASS__.'::handleFatalError');
Chris@0:         }
Chris@0: 
Chris@0:         if ($handlerIsNew = null === $handler) {
Chris@0:             $handler = new static();
Chris@0:         }
Chris@0: 
Chris@17:         if (null === $prev = set_error_handler([$handler, 'handleError'])) {
Chris@0:             restore_error_handler();
Chris@0:             // Specifying the error types earlier would expose us to https://bugs.php.net/63206
Chris@17:             set_error_handler([$handler, 'handleError'], $handler->thrownErrors | $handler->loggedErrors);
Chris@0:             $handler->isRoot = true;
Chris@0:         }
Chris@0: 
Chris@17:         if ($handlerIsNew && \is_array($prev) && $prev[0] instanceof self) {
Chris@0:             $handler = $prev[0];
Chris@0:             $replace = false;
Chris@0:         }
Chris@12:         if (!$replace && $prev) {
Chris@12:             restore_error_handler();
Chris@17:             $handlerIsRegistered = \is_array($prev) && $handler === $prev[0];
Chris@13:         } else {
Chris@13:             $handlerIsRegistered = true;
Chris@12:         }
Chris@17:         if (\is_array($prev = set_exception_handler([$handler, 'handleException'])) && $prev[0] instanceof self) {
Chris@12:             restore_exception_handler();
Chris@13:             if (!$handlerIsRegistered) {
Chris@13:                 $handler = $prev[0];
Chris@13:             } elseif ($handler !== $prev[0] && $replace) {
Chris@17:                 set_exception_handler([$handler, 'handleException']);
Chris@13:                 $p = $prev[0]->setExceptionHandler(null);
Chris@13:                 $handler->setExceptionHandler($p);
Chris@13:                 $prev[0]->setExceptionHandler($p);
Chris@13:             }
Chris@0:         } else {
Chris@12:             $handler->setExceptionHandler($prev);
Chris@0:         }
Chris@0: 
Chris@0:         $handler->throwAt(E_ALL & $handler->thrownErrors, true);
Chris@0: 
Chris@0:         return $handler;
Chris@0:     }
Chris@0: 
Chris@0:     public function __construct(BufferingLogger $bootstrappingLogger = null)
Chris@0:     {
Chris@0:         if ($bootstrappingLogger) {
Chris@0:             $this->bootstrappingLogger = $bootstrappingLogger;
Chris@0:             $this->setDefaultLogger($bootstrappingLogger);
Chris@0:         }
Chris@0:         $this->traceReflector = new \ReflectionProperty('Exception', 'trace');
Chris@0:         $this->traceReflector->setAccessible(true);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Sets a logger to non assigned errors levels.
Chris@0:      *
Chris@0:      * @param LoggerInterface $logger  A PSR-3 logger to put as default for the given levels
Chris@0:      * @param array|int       $levels  An array map of E_* to LogLevel::* or an integer bit field of E_* constants
Chris@0:      * @param bool            $replace Whether to replace or not any existing logger
Chris@0:      */
Chris@0:     public function setDefaultLogger(LoggerInterface $logger, $levels = E_ALL, $replace = false)
Chris@0:     {
Chris@17:         $loggers = [];
Chris@0: 
Chris@17:         if (\is_array($levels)) {
Chris@0:             foreach ($levels as $type => $logLevel) {
Chris@0:                 if (empty($this->loggers[$type][0]) || $replace || $this->loggers[$type][0] === $this->bootstrappingLogger) {
Chris@17:                     $loggers[$type] = [$logger, $logLevel];
Chris@0:                 }
Chris@0:             }
Chris@0:         } else {
Chris@0:             if (null === $levels) {
Chris@0:                 $levels = E_ALL;
Chris@0:             }
Chris@0:             foreach ($this->loggers as $type => $log) {
Chris@0:                 if (($type & $levels) && (empty($log[0]) || $replace || $log[0] === $this->bootstrappingLogger)) {
Chris@0:                     $log[0] = $logger;
Chris@0:                     $loggers[$type] = $log;
Chris@0:                 }
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         $this->setLoggers($loggers);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Sets a logger for each error level.
Chris@0:      *
Chris@0:      * @param array $loggers Error levels to [LoggerInterface|null, LogLevel::*] map
Chris@0:      *
Chris@0:      * @return array The previous map
Chris@0:      *
Chris@0:      * @throws \InvalidArgumentException
Chris@0:      */
Chris@0:     public function setLoggers(array $loggers)
Chris@0:     {
Chris@0:         $prevLogged = $this->loggedErrors;
Chris@0:         $prev = $this->loggers;
Chris@17:         $flush = [];
Chris@0: 
Chris@0:         foreach ($loggers as $type => $log) {
Chris@0:             if (!isset($prev[$type])) {
Chris@0:                 throw new \InvalidArgumentException('Unknown error type: '.$type);
Chris@0:             }
Chris@17:             if (!\is_array($log)) {
Chris@17:                 $log = [$log];
Chris@18:             } elseif (!\array_key_exists(0, $log)) {
Chris@0:                 throw new \InvalidArgumentException('No logger provided');
Chris@0:             }
Chris@0:             if (null === $log[0]) {
Chris@0:                 $this->loggedErrors &= ~$type;
Chris@0:             } elseif ($log[0] instanceof LoggerInterface) {
Chris@0:                 $this->loggedErrors |= $type;
Chris@0:             } else {
Chris@0:                 throw new \InvalidArgumentException('Invalid logger provided');
Chris@0:             }
Chris@0:             $this->loggers[$type] = $log + $prev[$type];
Chris@0: 
Chris@0:             if ($this->bootstrappingLogger && $prev[$type][0] === $this->bootstrappingLogger) {
Chris@0:                 $flush[$type] = $type;
Chris@0:             }
Chris@0:         }
Chris@0:         $this->reRegister($prevLogged | $this->thrownErrors);
Chris@0: 
Chris@0:         if ($flush) {
Chris@0:             foreach ($this->bootstrappingLogger->cleanLogs() as $log) {
Chris@0:                 $type = $log[2]['exception'] instanceof \ErrorException ? $log[2]['exception']->getSeverity() : E_ERROR;
Chris@0:                 if (!isset($flush[$type])) {
Chris@0:                     $this->bootstrappingLogger->log($log[0], $log[1], $log[2]);
Chris@0:                 } elseif ($this->loggers[$type][0]) {
Chris@0:                     $this->loggers[$type][0]->log($this->loggers[$type][1], $log[1], $log[2]);
Chris@0:                 }
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         return $prev;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Sets a user exception handler.
Chris@0:      *
Chris@0:      * @param callable $handler A handler that will be called on Exception
Chris@0:      *
Chris@0:      * @return callable|null The previous exception handler
Chris@0:      */
Chris@0:     public function setExceptionHandler(callable $handler = null)
Chris@0:     {
Chris@0:         $prev = $this->exceptionHandler;
Chris@0:         $this->exceptionHandler = $handler;
Chris@0: 
Chris@0:         return $prev;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Sets the PHP error levels that throw an exception when a PHP error occurs.
Chris@0:      *
Chris@0:      * @param int  $levels  A bit field of E_* constants for thrown errors
Chris@0:      * @param bool $replace Replace or amend the previous value
Chris@0:      *
Chris@0:      * @return int The previous value
Chris@0:      */
Chris@0:     public function throwAt($levels, $replace = false)
Chris@0:     {
Chris@0:         $prev = $this->thrownErrors;
Chris@0:         $this->thrownErrors = ($levels | E_RECOVERABLE_ERROR | E_USER_ERROR) & ~E_USER_DEPRECATED & ~E_DEPRECATED;
Chris@0:         if (!$replace) {
Chris@0:             $this->thrownErrors |= $prev;
Chris@0:         }
Chris@0:         $this->reRegister($prev | $this->loggedErrors);
Chris@0: 
Chris@0:         return $prev;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Sets the PHP error levels for which local variables are preserved.
Chris@0:      *
Chris@0:      * @param int  $levels  A bit field of E_* constants for scoped errors
Chris@0:      * @param bool $replace Replace or amend the previous value
Chris@0:      *
Chris@0:      * @return int The previous value
Chris@0:      */
Chris@0:     public function scopeAt($levels, $replace = false)
Chris@0:     {
Chris@0:         $prev = $this->scopedErrors;
Chris@0:         $this->scopedErrors = (int) $levels;
Chris@0:         if (!$replace) {
Chris@0:             $this->scopedErrors |= $prev;
Chris@0:         }
Chris@0: 
Chris@0:         return $prev;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Sets the PHP error levels for which the stack trace is preserved.
Chris@0:      *
Chris@0:      * @param int  $levels  A bit field of E_* constants for traced errors
Chris@0:      * @param bool $replace Replace or amend the previous value
Chris@0:      *
Chris@0:      * @return int The previous value
Chris@0:      */
Chris@0:     public function traceAt($levels, $replace = false)
Chris@0:     {
Chris@0:         $prev = $this->tracedErrors;
Chris@0:         $this->tracedErrors = (int) $levels;
Chris@0:         if (!$replace) {
Chris@0:             $this->tracedErrors |= $prev;
Chris@0:         }
Chris@0: 
Chris@0:         return $prev;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Sets the error levels where the @-operator is ignored.
Chris@0:      *
Chris@0:      * @param int  $levels  A bit field of E_* constants for screamed errors
Chris@0:      * @param bool $replace Replace or amend the previous value
Chris@0:      *
Chris@0:      * @return int The previous value
Chris@0:      */
Chris@0:     public function screamAt($levels, $replace = false)
Chris@0:     {
Chris@0:         $prev = $this->screamedErrors;
Chris@0:         $this->screamedErrors = (int) $levels;
Chris@0:         if (!$replace) {
Chris@0:             $this->screamedErrors |= $prev;
Chris@0:         }
Chris@0: 
Chris@0:         return $prev;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Re-registers as a PHP error handler if levels changed.
Chris@0:      */
Chris@0:     private function reRegister($prev)
Chris@0:     {
Chris@0:         if ($prev !== $this->thrownErrors | $this->loggedErrors) {
Chris@0:             $handler = set_error_handler('var_dump');
Chris@17:             $handler = \is_array($handler) ? $handler[0] : null;
Chris@0:             restore_error_handler();
Chris@0:             if ($handler === $this) {
Chris@0:                 restore_error_handler();
Chris@0:                 if ($this->isRoot) {
Chris@17:                     set_error_handler([$this, 'handleError'], $this->thrownErrors | $this->loggedErrors);
Chris@0:                 } else {
Chris@17:                     set_error_handler([$this, 'handleError']);
Chris@0:                 }
Chris@0:             }
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Handles errors by filtering then logging them according to the configured bit fields.
Chris@0:      *
Chris@0:      * @param int    $type    One of the E_* constants
Chris@0:      * @param string $message
Chris@0:      * @param string $file
Chris@0:      * @param int    $line
Chris@0:      *
Chris@0:      * @return bool Returns false when no handling happens so that the PHP engine can handle the error itself
Chris@0:      *
Chris@0:      * @throws \ErrorException When $this->thrownErrors requests so
Chris@0:      *
Chris@0:      * @internal
Chris@0:      */
Chris@0:     public function handleError($type, $message, $file, $line)
Chris@0:     {
Chris@0:         // Level is the current error reporting level to manage silent error.
Chris@16:         $level = error_reporting();
Chris@16:         $silenced = 0 === ($level & $type);
Chris@0:         // Strong errors are not authorized to be silenced.
Chris@16:         $level |= E_RECOVERABLE_ERROR | E_USER_ERROR | E_DEPRECATED | E_USER_DEPRECATED;
Chris@0:         $log = $this->loggedErrors & $type;
Chris@0:         $throw = $this->thrownErrors & $type & $level;
Chris@0:         $type &= $level | $this->screamedErrors;
Chris@0: 
Chris@0:         if (!$type || (!$log && !$throw)) {
Chris@16:             return !$silenced && $type && $log;
Chris@0:         }
Chris@0:         $scope = $this->scopedErrors & $type;
Chris@0: 
Chris@17:         if (4 < $numArgs = \func_num_args()) {
Chris@17:             $context = $scope ? (func_get_arg(4) ?: []) : [];
Chris@0:             $backtrace = 5 < $numArgs ? func_get_arg(5) : null; // defined on HHVM
Chris@0:         } else {
Chris@17:             $context = [];
Chris@0:             $backtrace = null;
Chris@0:         }
Chris@0: 
Chris@0:         if (isset($context['GLOBALS']) && $scope) {
Chris@0:             $e = $context;                  // Whatever the signature of the method,
Chris@0:             unset($e['GLOBALS'], $context); // $context is always a reference in 5.3
Chris@0:             $context = $e;
Chris@0:         }
Chris@0: 
Chris@0:         if (null !== $backtrace && $type & E_ERROR) {
Chris@0:             // E_ERROR fatal errors are triggered on HHVM when
Chris@0:             // hhvm.error_handling.call_user_handler_on_fatals=1
Chris@0:             // which is the way to get their backtrace.
Chris@0:             $this->handleFatalError(compact('type', 'message', 'file', 'line', 'backtrace'));
Chris@0: 
Chris@0:             return true;
Chris@0:         }
Chris@0: 
Chris@0:         $logMessage = $this->levels[$type].': '.$message;
Chris@0: 
Chris@0:         if (null !== self::$toStringException) {
Chris@0:             $errorAsException = self::$toStringException;
Chris@0:             self::$toStringException = null;
Chris@0:         } elseif (!$throw && !($type & $level)) {
Chris@12:             if (!isset(self::$silencedErrorCache[$id = $file.':'.$line])) {
Chris@17:                 $lightTrace = $this->tracedErrors & $type ? $this->cleanTrace(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 3), $type, $file, $line, false) : [];
Chris@12:                 $errorAsException = new SilencedErrorContext($type, $file, $line, $lightTrace);
Chris@12:             } elseif (isset(self::$silencedErrorCache[$id][$message])) {
Chris@12:                 $lightTrace = null;
Chris@12:                 $errorAsException = self::$silencedErrorCache[$id][$message];
Chris@12:                 ++$errorAsException->count;
Chris@12:             } else {
Chris@17:                 $lightTrace = [];
Chris@12:                 $errorAsException = null;
Chris@12:             }
Chris@12: 
Chris@12:             if (100 < ++self::$silencedErrorCount) {
Chris@17:                 self::$silencedErrorCache = $lightTrace = [];
Chris@12:                 self::$silencedErrorCount = 1;
Chris@12:             }
Chris@12:             if ($errorAsException) {
Chris@12:                 self::$silencedErrorCache[$id][$message] = $errorAsException;
Chris@12:             }
Chris@12:             if (null === $lightTrace) {
Chris@12:                 return;
Chris@12:             }
Chris@0:         } else {
Chris@0:             if ($scope) {
Chris@0:                 $errorAsException = new ContextErrorException($logMessage, 0, $type, $file, $line, $context);
Chris@0:             } else {
Chris@0:                 $errorAsException = new \ErrorException($logMessage, 0, $type, $file, $line);
Chris@0:             }
Chris@0: 
Chris@0:             // Clean the trace by removing function arguments and the first frames added by the error handler itself.
Chris@0:             if ($throw || $this->tracedErrors & $type) {
Chris@0:                 $backtrace = $backtrace ?: $errorAsException->getTrace();
Chris@12:                 $lightTrace = $this->cleanTrace($backtrace, $type, $file, $line, $throw);
Chris@0:                 $this->traceReflector->setValue($errorAsException, $lightTrace);
Chris@0:             } else {
Chris@17:                 $this->traceReflector->setValue($errorAsException, []);
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         if ($throw) {
Chris@0:             if (E_USER_ERROR & $type) {
Chris@0:                 for ($i = 1; isset($backtrace[$i]); ++$i) {
Chris@0:                     if (isset($backtrace[$i]['function'], $backtrace[$i]['type'], $backtrace[$i - 1]['function'])
Chris@0:                         && '__toString' === $backtrace[$i]['function']
Chris@0:                         && '->' === $backtrace[$i]['type']
Chris@0:                         && !isset($backtrace[$i - 1]['class'])
Chris@0:                         && ('trigger_error' === $backtrace[$i - 1]['function'] || 'user_error' === $backtrace[$i - 1]['function'])
Chris@0:                     ) {
Chris@0:                         // Here, we know trigger_error() has been called from __toString().
Chris@0:                         // HHVM is fine with throwing from __toString() but PHP triggers a fatal error instead.
Chris@0:                         // A small convention allows working around the limitation:
Chris@0:                         // given a caught $e exception in __toString(), quitting the method with
Chris@0:                         // `return trigger_error($e, E_USER_ERROR);` allows this error handler
Chris@0:                         // to make $e get through the __toString() barrier.
Chris@0: 
Chris@0:                         foreach ($context as $e) {
Chris@0:                             if (($e instanceof \Exception || $e instanceof \Throwable) && $e->__toString() === $message) {
Chris@0:                                 if (1 === $i) {
Chris@0:                                     // On HHVM
Chris@0:                                     $errorAsException = $e;
Chris@0:                                     break;
Chris@0:                                 }
Chris@0:                                 self::$toStringException = $e;
Chris@0: 
Chris@0:                                 return true;
Chris@0:                             }
Chris@0:                         }
Chris@0: 
Chris@0:                         if (1 < $i) {
Chris@0:                             // On PHP (not on HHVM), display the original error message instead of the default one.
Chris@0:                             $this->handleException($errorAsException);
Chris@0: 
Chris@0:                             // Stop the process by giving back the error to the native handler.
Chris@0:                             return false;
Chris@0:                         }
Chris@0:                     }
Chris@0:                 }
Chris@0:             }
Chris@0: 
Chris@0:             throw $errorAsException;
Chris@0:         }
Chris@0: 
Chris@0:         if ($this->isRecursive) {
Chris@0:             $log = 0;
Chris@0:         } elseif (self::$stackedErrorLevels) {
Chris@17:             self::$stackedErrors[] = [
Chris@0:                 $this->loggers[$type][0],
Chris@0:                 ($type & $level) ? $this->loggers[$type][1] : LogLevel::DEBUG,
Chris@0:                 $logMessage,
Chris@17:                 $errorAsException ? ['exception' => $errorAsException] : [],
Chris@17:             ];
Chris@0:         } else {
Chris@18:             if (!\defined('HHVM_VERSION')) {
Chris@18:                 $currentErrorHandler = set_error_handler('var_dump');
Chris@18:                 restore_error_handler();
Chris@18:             }
Chris@18: 
Chris@0:             try {
Chris@0:                 $this->isRecursive = true;
Chris@0:                 $level = ($type & $level) ? $this->loggers[$type][1] : LogLevel::DEBUG;
Chris@17:                 $this->loggers[$type][0]->log($level, $logMessage, $errorAsException ? ['exception' => $errorAsException] : []);
Chris@0:             } finally {
Chris@0:                 $this->isRecursive = false;
Chris@17: 
Chris@17:                 if (!\defined('HHVM_VERSION')) {
Chris@18:                     set_error_handler($currentErrorHandler);
Chris@17:                 }
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@16:         return !$silenced && $type && $log;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Handles an exception by logging then forwarding it to another handler.
Chris@0:      *
Chris@0:      * @param \Exception|\Throwable $exception An exception to handle
Chris@0:      * @param array                 $error     An array as returned by error_get_last()
Chris@0:      *
Chris@0:      * @internal
Chris@0:      */
Chris@0:     public function handleException($exception, array $error = null)
Chris@0:     {
Chris@0:         if (null === $error) {
Chris@0:             self::$exitCode = 255;
Chris@0:         }
Chris@0:         if (!$exception instanceof \Exception) {
Chris@0:             $exception = new FatalThrowableError($exception);
Chris@0:         }
Chris@0:         $type = $exception instanceof FatalErrorException ? $exception->getSeverity() : E_ERROR;
Chris@12:         $handlerException = null;
Chris@0: 
Chris@0:         if (($this->loggedErrors & $type) || $exception instanceof FatalThrowableError) {
Chris@0:             if ($exception instanceof FatalErrorException) {
Chris@0:                 if ($exception instanceof FatalThrowableError) {
Chris@17:                     $error = [
Chris@0:                         'type' => $type,
Chris@0:                         'message' => $message = $exception->getMessage(),
Chris@0:                         'file' => $exception->getFile(),
Chris@0:                         'line' => $exception->getLine(),
Chris@17:                     ];
Chris@0:                 } else {
Chris@0:                     $message = 'Fatal '.$exception->getMessage();
Chris@0:                 }
Chris@0:             } elseif ($exception instanceof \ErrorException) {
Chris@0:                 $message = 'Uncaught '.$exception->getMessage();
Chris@0:             } else {
Chris@0:                 $message = 'Uncaught Exception: '.$exception->getMessage();
Chris@0:             }
Chris@0:         }
Chris@0:         if ($this->loggedErrors & $type) {
Chris@0:             try {
Chris@17:                 $this->loggers[$type][0]->log($this->loggers[$type][1], $message, ['exception' => $exception]);
Chris@0:             } catch (\Exception $handlerException) {
Chris@0:             } catch (\Throwable $handlerException) {
Chris@0:             }
Chris@0:         }
Chris@0:         if ($exception instanceof FatalErrorException && !$exception instanceof OutOfMemoryException && $error) {
Chris@0:             foreach ($this->getFatalErrorHandlers() as $handler) {
Chris@0:                 if ($e = $handler->handleError($error, $exception)) {
Chris@0:                     $exception = $e;
Chris@0:                     break;
Chris@0:                 }
Chris@0:             }
Chris@0:         }
Chris@13:         $exceptionHandler = $this->exceptionHandler;
Chris@13:         $this->exceptionHandler = null;
Chris@0:         try {
Chris@13:             if (null !== $exceptionHandler) {
Chris@13:                 return \call_user_func($exceptionHandler, $exception);
Chris@12:             }
Chris@12:             $handlerException = $handlerException ?: $exception;
Chris@0:         } catch (\Exception $handlerException) {
Chris@0:         } catch (\Throwable $handlerException) {
Chris@0:         }
Chris@12:         if ($exception === $handlerException) {
Chris@12:             self::$reservedMemory = null; // Disable the fatal error handler
Chris@12:             throw $exception; // Give back $exception to the native handler
Chris@0:         }
Chris@12:         $this->handleException($handlerException);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Shutdown registered function for handling PHP fatal errors.
Chris@0:      *
Chris@0:      * @param array $error An array as returned by error_get_last()
Chris@0:      *
Chris@0:      * @internal
Chris@0:      */
Chris@0:     public static function handleFatalError(array $error = null)
Chris@0:     {
Chris@0:         if (null === self::$reservedMemory) {
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@12:         $handler = self::$reservedMemory = null;
Chris@17:         $handlers = [];
Chris@12:         $previousHandler = null;
Chris@12:         $sameHandlerLimit = 10;
Chris@0: 
Chris@17:         while (!\is_array($handler) || !$handler[0] instanceof self) {
Chris@12:             $handler = set_exception_handler('var_dump');
Chris@12:             restore_exception_handler();
Chris@0: 
Chris@12:             if (!$handler) {
Chris@12:                 break;
Chris@12:             }
Chris@12:             restore_exception_handler();
Chris@12: 
Chris@12:             if ($handler !== $previousHandler) {
Chris@12:                 array_unshift($handlers, $handler);
Chris@12:                 $previousHandler = $handler;
Chris@12:             } elseif (0 === --$sameHandlerLimit) {
Chris@12:                 $handler = null;
Chris@12:                 break;
Chris@12:             }
Chris@12:         }
Chris@12:         foreach ($handlers as $h) {
Chris@12:             set_exception_handler($h);
Chris@12:         }
Chris@12:         if (!$handler) {
Chris@0:             return;
Chris@0:         }
Chris@12:         if ($handler !== $h) {
Chris@12:             $handler[0]->setExceptionHandler($h);
Chris@12:         }
Chris@12:         $handler = $handler[0];
Chris@17:         $handlers = [];
Chris@0: 
Chris@0:         if ($exit = null === $error) {
Chris@0:             $error = error_get_last();
Chris@0:         }
Chris@0: 
Chris@0:         try {
Chris@0:             while (self::$stackedErrorLevels) {
Chris@0:                 static::unstackErrors();
Chris@0:             }
Chris@0:         } catch (\Exception $exception) {
Chris@0:             // Handled below
Chris@0:         } catch (\Throwable $exception) {
Chris@0:             // Handled below
Chris@0:         }
Chris@0: 
Chris@0:         if ($error && $error['type'] &= E_PARSE | E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR) {
Chris@0:             // Let's not throw anymore but keep logging
Chris@0:             $handler->throwAt(0, true);
Chris@0:             $trace = isset($error['backtrace']) ? $error['backtrace'] : null;
Chris@0: 
Chris@0:             if (0 === strpos($error['message'], 'Allowed memory') || 0 === strpos($error['message'], 'Out of memory')) {
Chris@0:                 $exception = new OutOfMemoryException($handler->levels[$error['type']].': '.$error['message'], 0, $error['type'], $error['file'], $error['line'], 2, false, $trace);
Chris@0:             } else {
Chris@0:                 $exception = new FatalErrorException($handler->levels[$error['type']].': '.$error['message'], 0, $error['type'], $error['file'], $error['line'], 2, true, $trace);
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         try {
Chris@0:             if (isset($exception)) {
Chris@0:                 self::$exitCode = 255;
Chris@0:                 $handler->handleException($exception, $error);
Chris@0:             }
Chris@0:         } catch (FatalErrorException $e) {
Chris@0:             // Ignore this re-throw
Chris@0:         }
Chris@0: 
Chris@0:         if ($exit && self::$exitCode) {
Chris@0:             $exitCode = self::$exitCode;
Chris@0:             register_shutdown_function('register_shutdown_function', function () use ($exitCode) { exit($exitCode); });
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Configures the error handler for delayed handling.
Chris@0:      * Ensures also that non-catchable fatal errors are never silenced.
Chris@0:      *
Chris@0:      * As shown by http://bugs.php.net/42098 and http://bugs.php.net/60724
Chris@0:      * PHP has a compile stage where it behaves unusually. To workaround it,
Chris@0:      * we plug an error handler that only stacks errors for later.
Chris@0:      *
Chris@0:      * The most important feature of this is to prevent
Chris@0:      * autoloading until unstackErrors() is called.
Chris@12:      *
Chris@12:      * @deprecated since version 3.4, to be removed in 4.0.
Chris@0:      */
Chris@0:     public static function stackErrors()
Chris@0:     {
Chris@12:         @trigger_error('Support for stacking errors is deprecated since Symfony 3.4 and will be removed in 4.0.', E_USER_DEPRECATED);
Chris@12: 
Chris@0:         self::$stackedErrorLevels[] = error_reporting(error_reporting() | E_PARSE | E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Unstacks stacked errors and forwards to the logger.
Chris@12:      *
Chris@12:      * @deprecated since version 3.4, to be removed in 4.0.
Chris@0:      */
Chris@0:     public static function unstackErrors()
Chris@0:     {
Chris@12:         @trigger_error('Support for unstacking errors is deprecated since Symfony 3.4 and will be removed in 4.0.', E_USER_DEPRECATED);
Chris@12: 
Chris@0:         $level = array_pop(self::$stackedErrorLevels);
Chris@0: 
Chris@0:         if (null !== $level) {
Chris@0:             $errorReportingLevel = error_reporting($level);
Chris@0:             if ($errorReportingLevel !== ($level | E_PARSE | E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR)) {
Chris@0:                 // If the user changed the error level, do not overwrite it
Chris@0:                 error_reporting($errorReportingLevel);
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         if (empty(self::$stackedErrorLevels)) {
Chris@0:             $errors = self::$stackedErrors;
Chris@17:             self::$stackedErrors = [];
Chris@0: 
Chris@0:             foreach ($errors as $error) {
Chris@0:                 $error[0]->log($error[1], $error[2], $error[3]);
Chris@0:             }
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Gets the fatal error handlers.
Chris@0:      *
Chris@0:      * Override this method if you want to define more fatal error handlers.
Chris@0:      *
Chris@0:      * @return FatalErrorHandlerInterface[] An array of FatalErrorHandlerInterface
Chris@0:      */
Chris@0:     protected function getFatalErrorHandlers()
Chris@0:     {
Chris@17:         return [
Chris@0:             new UndefinedFunctionFatalErrorHandler(),
Chris@0:             new UndefinedMethodFatalErrorHandler(),
Chris@0:             new ClassNotFoundFatalErrorHandler(),
Chris@17:         ];
Chris@0:     }
Chris@12: 
Chris@12:     private function cleanTrace($backtrace, $type, $file, $line, $throw)
Chris@12:     {
Chris@12:         $lightTrace = $backtrace;
Chris@12: 
Chris@12:         for ($i = 0; isset($backtrace[$i]); ++$i) {
Chris@12:             if (isset($backtrace[$i]['file'], $backtrace[$i]['line']) && $backtrace[$i]['line'] === $line && $backtrace[$i]['file'] === $file) {
Chris@17:                 $lightTrace = \array_slice($lightTrace, 1 + $i);
Chris@12:                 break;
Chris@12:             }
Chris@12:         }
Chris@12:         if (!($throw || $this->scopedErrors & $type)) {
Chris@12:             for ($i = 0; isset($lightTrace[$i]); ++$i) {
Chris@12:                 unset($lightTrace[$i]['args'], $lightTrace[$i]['object']);
Chris@12:             }
Chris@12:         }
Chris@12: 
Chris@12:         return $lightTrace;
Chris@12:     }
Chris@0: }