717 lines
26 KiB
PHP
717 lines
26 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Debug;
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use Psr\Log\LoggerInterface;
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use Psr\Log\LogLevel;
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use Symfony\Component\Debug\Exception\FatalErrorException;
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use Symfony\Component\Debug\Exception\FatalThrowableError;
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use Symfony\Component\Debug\Exception\FlattenException;
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use Symfony\Component\Debug\Exception\OutOfMemoryException;
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use Symfony\Component\Debug\Exception\SilencedErrorContext;
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use Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler;
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use Symfony\Component\Debug\FatalErrorHandler\FatalErrorHandlerInterface;
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use Symfony\Component\Debug\FatalErrorHandler\UndefinedFunctionFatalErrorHandler;
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use Symfony\Component\Debug\FatalErrorHandler\UndefinedMethodFatalErrorHandler;
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/**
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* A generic ErrorHandler for the PHP engine.
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*
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* Provides five bit fields that control how errors are handled:
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* - thrownErrors: errors thrown as \ErrorException
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* - loggedErrors: logged errors, when not @-silenced
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* - scopedErrors: errors thrown or logged with their local context
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* - tracedErrors: errors logged with their stack trace
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* - screamedErrors: never @-silenced errors
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*
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* Each error level can be logged by a dedicated PSR-3 logger object.
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* Screaming only applies to logging.
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* Throwing takes precedence over logging.
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* Uncaught exceptions are logged as E_ERROR.
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* E_DEPRECATED and E_USER_DEPRECATED levels never throw.
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* E_RECOVERABLE_ERROR and E_USER_ERROR levels always throw.
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* Non catchable errors that can be detected at shutdown time are logged when the scream bit field allows so.
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* As errors have a performance cost, repeated errors are all logged, so that the developer
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* can see them and weight them as more important to fix than others of the same level.
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*
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* @author Nicolas Grekas <p@tchwork.com>
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* @author Grégoire Pineau <lyrixx@lyrixx.info>
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*
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* @final since Symfony 4.3
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*/
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class ErrorHandler
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{
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private $levels = [
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E_DEPRECATED => 'Deprecated',
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E_USER_DEPRECATED => 'User Deprecated',
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E_NOTICE => 'Notice',
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E_USER_NOTICE => 'User Notice',
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E_STRICT => 'Runtime Notice',
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E_WARNING => 'Warning',
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E_USER_WARNING => 'User Warning',
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E_COMPILE_WARNING => 'Compile Warning',
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E_CORE_WARNING => 'Core Warning',
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E_USER_ERROR => 'User Error',
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E_RECOVERABLE_ERROR => 'Catchable Fatal Error',
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E_COMPILE_ERROR => 'Compile Error',
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E_PARSE => 'Parse Error',
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E_ERROR => 'Error',
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E_CORE_ERROR => 'Core Error',
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];
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private $loggers = [
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E_DEPRECATED => [null, LogLevel::INFO],
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E_USER_DEPRECATED => [null, LogLevel::INFO],
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E_NOTICE => [null, LogLevel::WARNING],
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E_USER_NOTICE => [null, LogLevel::WARNING],
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E_STRICT => [null, LogLevel::WARNING],
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E_WARNING => [null, LogLevel::WARNING],
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E_USER_WARNING => [null, LogLevel::WARNING],
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E_COMPILE_WARNING => [null, LogLevel::WARNING],
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E_CORE_WARNING => [null, LogLevel::WARNING],
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E_USER_ERROR => [null, LogLevel::CRITICAL],
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E_RECOVERABLE_ERROR => [null, LogLevel::CRITICAL],
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E_COMPILE_ERROR => [null, LogLevel::CRITICAL],
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E_PARSE => [null, LogLevel::CRITICAL],
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E_ERROR => [null, LogLevel::CRITICAL],
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E_CORE_ERROR => [null, LogLevel::CRITICAL],
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];
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private $thrownErrors = 0x1FFF; // E_ALL - E_DEPRECATED - E_USER_DEPRECATED
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private $scopedErrors = 0x1FFF; // E_ALL - E_DEPRECATED - E_USER_DEPRECATED
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private $tracedErrors = 0x77FB; // E_ALL - E_STRICT - E_PARSE
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private $screamedErrors = 0x55; // E_ERROR + E_CORE_ERROR + E_COMPILE_ERROR + E_PARSE
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private $loggedErrors = 0;
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private $traceReflector;
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private $isRecursive = 0;
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private $isRoot = false;
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private $exceptionHandler;
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private $bootstrappingLogger;
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private static $reservedMemory;
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private static $toStringException = null;
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private static $silencedErrorCache = [];
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private static $silencedErrorCount = 0;
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private static $exitCode = 0;
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/**
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* Registers the error handler.
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*
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* @param self|null $handler The handler to register
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* @param bool $replace Whether to replace or not any existing handler
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*
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* @return self The registered error handler
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*/
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public static function register(self $handler = null, $replace = true)
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{
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if (null === self::$reservedMemory) {
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self::$reservedMemory = str_repeat('x', 10240);
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register_shutdown_function(__CLASS__.'::handleFatalError');
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}
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if ($handlerIsNew = null === $handler) {
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$handler = new static();
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}
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if (null === $prev = set_error_handler([$handler, 'handleError'])) {
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restore_error_handler();
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// Specifying the error types earlier would expose us to https://bugs.php.net/63206
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set_error_handler([$handler, 'handleError'], $handler->thrownErrors | $handler->loggedErrors);
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$handler->isRoot = true;
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}
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if ($handlerIsNew && \is_array($prev) && $prev[0] instanceof self) {
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$handler = $prev[0];
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$replace = false;
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}
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if (!$replace && $prev) {
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restore_error_handler();
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$handlerIsRegistered = \is_array($prev) && $handler === $prev[0];
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} else {
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$handlerIsRegistered = true;
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}
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if (\is_array($prev = set_exception_handler([$handler, 'handleException'])) && $prev[0] instanceof self) {
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restore_exception_handler();
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if (!$handlerIsRegistered) {
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$handler = $prev[0];
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} elseif ($handler !== $prev[0] && $replace) {
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set_exception_handler([$handler, 'handleException']);
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$p = $prev[0]->setExceptionHandler(null);
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$handler->setExceptionHandler($p);
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$prev[0]->setExceptionHandler($p);
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}
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} else {
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$handler->setExceptionHandler($prev);
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}
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$handler->throwAt(E_ALL & $handler->thrownErrors, true);
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return $handler;
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}
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public function __construct(BufferingLogger $bootstrappingLogger = null)
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{
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if ($bootstrappingLogger) {
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$this->bootstrappingLogger = $bootstrappingLogger;
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$this->setDefaultLogger($bootstrappingLogger);
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}
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$this->traceReflector = new \ReflectionProperty('Exception', 'trace');
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$this->traceReflector->setAccessible(true);
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}
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/**
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* Sets a logger to non assigned errors levels.
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*
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* @param LoggerInterface $logger A PSR-3 logger to put as default for the given levels
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* @param array|int $levels An array map of E_* to LogLevel::* or an integer bit field of E_* constants
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* @param bool $replace Whether to replace or not any existing logger
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*/
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public function setDefaultLogger(LoggerInterface $logger, $levels = E_ALL, $replace = false)
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{
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$loggers = [];
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if (\is_array($levels)) {
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foreach ($levels as $type => $logLevel) {
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if (empty($this->loggers[$type][0]) || $replace || $this->loggers[$type][0] === $this->bootstrappingLogger) {
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$loggers[$type] = [$logger, $logLevel];
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}
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}
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} else {
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if (null === $levels) {
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$levels = E_ALL;
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}
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foreach ($this->loggers as $type => $log) {
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if (($type & $levels) && (empty($log[0]) || $replace || $log[0] === $this->bootstrappingLogger)) {
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$log[0] = $logger;
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$loggers[$type] = $log;
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}
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}
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}
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$this->setLoggers($loggers);
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}
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/**
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* Sets a logger for each error level.
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*
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* @param array $loggers Error levels to [LoggerInterface|null, LogLevel::*] map
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*
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* @return array The previous map
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*
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* @throws \InvalidArgumentException
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*/
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public function setLoggers(array $loggers)
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{
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$prevLogged = $this->loggedErrors;
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$prev = $this->loggers;
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$flush = [];
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foreach ($loggers as $type => $log) {
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if (!isset($prev[$type])) {
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throw new \InvalidArgumentException('Unknown error type: '.$type);
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}
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if (!\is_array($log)) {
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$log = [$log];
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} elseif (!\array_key_exists(0, $log)) {
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throw new \InvalidArgumentException('No logger provided');
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}
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if (null === $log[0]) {
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$this->loggedErrors &= ~$type;
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} elseif ($log[0] instanceof LoggerInterface) {
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$this->loggedErrors |= $type;
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} else {
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throw new \InvalidArgumentException('Invalid logger provided');
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}
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$this->loggers[$type] = $log + $prev[$type];
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if ($this->bootstrappingLogger && $prev[$type][0] === $this->bootstrappingLogger) {
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$flush[$type] = $type;
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}
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}
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$this->reRegister($prevLogged | $this->thrownErrors);
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if ($flush) {
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foreach ($this->bootstrappingLogger->cleanLogs() as $log) {
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$type = $log[2]['exception'] instanceof \ErrorException ? $log[2]['exception']->getSeverity() : E_ERROR;
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if (!isset($flush[$type])) {
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$this->bootstrappingLogger->log($log[0], $log[1], $log[2]);
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} elseif ($this->loggers[$type][0]) {
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$this->loggers[$type][0]->log($this->loggers[$type][1], $log[1], $log[2]);
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}
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}
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}
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return $prev;
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}
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/**
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* Sets a user exception handler.
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*
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* @param callable $handler A handler that will be called on Exception
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*
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* @return callable|null The previous exception handler
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*/
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public function setExceptionHandler(callable $handler = null)
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{
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$prev = $this->exceptionHandler;
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$this->exceptionHandler = $handler;
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return $prev;
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}
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/**
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* Sets the PHP error levels that throw an exception when a PHP error occurs.
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*
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* @param int $levels A bit field of E_* constants for thrown errors
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* @param bool $replace Replace or amend the previous value
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*
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* @return int The previous value
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*/
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public function throwAt($levels, $replace = false)
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{
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$prev = $this->thrownErrors;
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$this->thrownErrors = ($levels | E_RECOVERABLE_ERROR | E_USER_ERROR) & ~E_USER_DEPRECATED & ~E_DEPRECATED;
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if (!$replace) {
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$this->thrownErrors |= $prev;
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}
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$this->reRegister($prev | $this->loggedErrors);
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return $prev;
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}
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/**
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* Sets the PHP error levels for which local variables are preserved.
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*
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* @param int $levels A bit field of E_* constants for scoped errors
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* @param bool $replace Replace or amend the previous value
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*
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* @return int The previous value
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*/
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public function scopeAt($levels, $replace = false)
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{
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$prev = $this->scopedErrors;
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$this->scopedErrors = (int) $levels;
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if (!$replace) {
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$this->scopedErrors |= $prev;
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}
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return $prev;
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}
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/**
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* Sets the PHP error levels for which the stack trace is preserved.
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*
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* @param int $levels A bit field of E_* constants for traced errors
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* @param bool $replace Replace or amend the previous value
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*
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* @return int The previous value
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*/
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public function traceAt($levels, $replace = false)
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{
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$prev = $this->tracedErrors;
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$this->tracedErrors = (int) $levels;
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if (!$replace) {
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$this->tracedErrors |= $prev;
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}
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return $prev;
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}
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/**
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* Sets the error levels where the @-operator is ignored.
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*
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* @param int $levels A bit field of E_* constants for screamed errors
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* @param bool $replace Replace or amend the previous value
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*
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* @return int The previous value
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*/
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public function screamAt($levels, $replace = false)
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{
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$prev = $this->screamedErrors;
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$this->screamedErrors = (int) $levels;
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if (!$replace) {
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$this->screamedErrors |= $prev;
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}
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return $prev;
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}
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/**
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* Re-registers as a PHP error handler if levels changed.
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*/
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private function reRegister($prev)
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{
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if ($prev !== $this->thrownErrors | $this->loggedErrors) {
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$handler = set_error_handler('var_dump');
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$handler = \is_array($handler) ? $handler[0] : null;
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restore_error_handler();
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if ($handler === $this) {
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restore_error_handler();
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if ($this->isRoot) {
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set_error_handler([$this, 'handleError'], $this->thrownErrors | $this->loggedErrors);
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} else {
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set_error_handler([$this, 'handleError']);
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}
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}
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}
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}
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/**
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* Handles errors by filtering then logging them according to the configured bit fields.
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*
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* @param int $type One of the E_* constants
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* @param string $message
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* @param string $file
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* @param int $line
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*
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* @return bool Returns false when no handling happens so that the PHP engine can handle the error itself
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*
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* @throws \ErrorException When $this->thrownErrors requests so
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*
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* @internal
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*/
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public function handleError($type, $message, $file, $line)
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{
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if (\PHP_VERSION_ID >= 70300 && E_WARNING === $type && '"' === $message[0] && false !== strpos($message, '" targeting switch is equivalent to "break')) {
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$type = E_DEPRECATED;
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}
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// Level is the current error reporting level to manage silent error.
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$level = error_reporting();
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$silenced = 0 === ($level & $type);
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// Strong errors are not authorized to be silenced.
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$level |= E_RECOVERABLE_ERROR | E_USER_ERROR | E_DEPRECATED | E_USER_DEPRECATED;
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$log = $this->loggedErrors & $type;
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$throw = $this->thrownErrors & $type & $level;
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$type &= $level | $this->screamedErrors;
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if (!$type || (!$log && !$throw)) {
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return !$silenced && $type && $log;
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}
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$scope = $this->scopedErrors & $type;
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if (4 < $numArgs = \func_num_args()) {
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$context = $scope ? (func_get_arg(4) ?: []) : [];
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} else {
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$context = [];
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}
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if (isset($context['GLOBALS']) && $scope) {
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$e = $context; // Whatever the signature of the method,
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unset($e['GLOBALS'], $context); // $context is always a reference in 5.3
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$context = $e;
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}
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if (false !== strpos($message, "class@anonymous\0")) {
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$logMessage = $this->levels[$type].': '.(new FlattenException())->setMessage($message)->getMessage();
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} else {
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$logMessage = $this->levels[$type].': '.$message;
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}
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if (null !== self::$toStringException) {
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$errorAsException = self::$toStringException;
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self::$toStringException = null;
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} elseif (!$throw && !($type & $level)) {
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if (!isset(self::$silencedErrorCache[$id = $file.':'.$line])) {
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$lightTrace = $this->tracedErrors & $type ? $this->cleanTrace(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 5), $type, $file, $line, false) : [];
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$errorAsException = new SilencedErrorContext($type, $file, $line, isset($lightTrace[1]) ? [$lightTrace[0]] : $lightTrace);
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} elseif (isset(self::$silencedErrorCache[$id][$message])) {
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$lightTrace = null;
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$errorAsException = self::$silencedErrorCache[$id][$message];
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++$errorAsException->count;
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} else {
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$lightTrace = [];
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$errorAsException = null;
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}
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if (100 < ++self::$silencedErrorCount) {
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self::$silencedErrorCache = $lightTrace = [];
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self::$silencedErrorCount = 1;
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}
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if ($errorAsException) {
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self::$silencedErrorCache[$id][$message] = $errorAsException;
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}
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if (null === $lightTrace) {
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return true;
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}
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} else {
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$errorAsException = new \ErrorException($logMessage, 0, $type, $file, $line);
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if ($throw || $this->tracedErrors & $type) {
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$backtrace = $errorAsException->getTrace();
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$lightTrace = $this->cleanTrace($backtrace, $type, $file, $line, $throw);
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$this->traceReflector->setValue($errorAsException, $lightTrace);
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} else {
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$this->traceReflector->setValue($errorAsException, []);
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$backtrace = [];
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}
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}
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if ($throw) {
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if (\PHP_VERSION_ID < 70400 && E_USER_ERROR & $type) {
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for ($i = 1; isset($backtrace[$i]); ++$i) {
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if (isset($backtrace[$i]['function'], $backtrace[$i]['type'], $backtrace[$i - 1]['function'])
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&& '__toString' === $backtrace[$i]['function']
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&& '->' === $backtrace[$i]['type']
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&& !isset($backtrace[$i - 1]['class'])
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&& ('trigger_error' === $backtrace[$i - 1]['function'] || 'user_error' === $backtrace[$i - 1]['function'])
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) {
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// Here, we know trigger_error() has been called from __toString().
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// PHP triggers a fatal error when throwing from __toString().
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// A small convention allows working around the limitation:
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// given a caught $e exception in __toString(), quitting the method with
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// `return trigger_error($e, E_USER_ERROR);` allows this error handler
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// to make $e get through the __toString() barrier.
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foreach ($context as $e) {
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if ($e instanceof \Throwable && $e->__toString() === $message) {
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self::$toStringException = $e;
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return true;
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}
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}
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// Display the original error message instead of the default one.
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$this->handleException($errorAsException);
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// Stop the process by giving back the error to the native handler.
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return false;
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}
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}
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}
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throw $errorAsException;
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}
|
|
|
|
if ($this->isRecursive) {
|
|
$log = 0;
|
|
} else {
|
|
if (!\defined('HHVM_VERSION')) {
|
|
$currentErrorHandler = set_error_handler('var_dump');
|
|
restore_error_handler();
|
|
}
|
|
|
|
try {
|
|
$this->isRecursive = true;
|
|
$level = ($type & $level) ? $this->loggers[$type][1] : LogLevel::DEBUG;
|
|
$this->loggers[$type][0]->log($level, $logMessage, $errorAsException ? ['exception' => $errorAsException] : []);
|
|
} finally {
|
|
$this->isRecursive = false;
|
|
|
|
if (!\defined('HHVM_VERSION')) {
|
|
set_error_handler($currentErrorHandler);
|
|
}
|
|
}
|
|
}
|
|
|
|
return !$silenced && $type && $log;
|
|
}
|
|
|
|
/**
|
|
* Handles an exception by logging then forwarding it to another handler.
|
|
*
|
|
* @param \Exception|\Throwable $exception An exception to handle
|
|
* @param array $error An array as returned by error_get_last()
|
|
*
|
|
* @internal
|
|
*/
|
|
public function handleException($exception, array $error = null)
|
|
{
|
|
if (null === $error) {
|
|
self::$exitCode = 255;
|
|
}
|
|
if (!$exception instanceof \Exception) {
|
|
$exception = new FatalThrowableError($exception);
|
|
}
|
|
$type = $exception instanceof FatalErrorException ? $exception->getSeverity() : E_ERROR;
|
|
$handlerException = null;
|
|
|
|
if (($this->loggedErrors & $type) || $exception instanceof FatalThrowableError) {
|
|
if (false !== strpos($message = $exception->getMessage(), "class@anonymous\0")) {
|
|
$message = (new FlattenException())->setMessage($message)->getMessage();
|
|
}
|
|
if ($exception instanceof FatalErrorException) {
|
|
if ($exception instanceof FatalThrowableError) {
|
|
$error = [
|
|
'type' => $type,
|
|
'message' => $message,
|
|
'file' => $exception->getFile(),
|
|
'line' => $exception->getLine(),
|
|
];
|
|
} else {
|
|
$message = 'Fatal '.$message;
|
|
}
|
|
} elseif ($exception instanceof \ErrorException) {
|
|
$message = 'Uncaught '.$message;
|
|
} else {
|
|
$message = 'Uncaught Exception: '.$message;
|
|
}
|
|
}
|
|
if ($this->loggedErrors & $type) {
|
|
try {
|
|
$this->loggers[$type][0]->log($this->loggers[$type][1], $message, ['exception' => $exception]);
|
|
} catch (\Throwable $handlerException) {
|
|
}
|
|
}
|
|
if ($exception instanceof FatalErrorException && !$exception instanceof OutOfMemoryException && $error) {
|
|
foreach ($this->getFatalErrorHandlers() as $handler) {
|
|
if ($e = $handler->handleError($error, $exception)) {
|
|
$exception = $e;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
$exceptionHandler = $this->exceptionHandler;
|
|
$this->exceptionHandler = null;
|
|
try {
|
|
if (null !== $exceptionHandler) {
|
|
$exceptionHandler($exception);
|
|
|
|
return;
|
|
}
|
|
$handlerException = $handlerException ?: $exception;
|
|
} catch (\Throwable $handlerException) {
|
|
}
|
|
if ($exception === $handlerException) {
|
|
self::$reservedMemory = null; // Disable the fatal error handler
|
|
throw $exception; // Give back $exception to the native handler
|
|
}
|
|
$this->handleException($handlerException);
|
|
}
|
|
|
|
/**
|
|
* Shutdown registered function for handling PHP fatal errors.
|
|
*
|
|
* @param array $error An array as returned by error_get_last()
|
|
*
|
|
* @internal
|
|
*/
|
|
public static function handleFatalError(array $error = null)
|
|
{
|
|
if (null === self::$reservedMemory) {
|
|
return;
|
|
}
|
|
|
|
$handler = self::$reservedMemory = null;
|
|
$handlers = [];
|
|
$previousHandler = null;
|
|
$sameHandlerLimit = 10;
|
|
|
|
while (!\is_array($handler) || !$handler[0] instanceof self) {
|
|
$handler = set_exception_handler('var_dump');
|
|
restore_exception_handler();
|
|
|
|
if (!$handler) {
|
|
break;
|
|
}
|
|
restore_exception_handler();
|
|
|
|
if ($handler !== $previousHandler) {
|
|
array_unshift($handlers, $handler);
|
|
$previousHandler = $handler;
|
|
} elseif (0 === --$sameHandlerLimit) {
|
|
$handler = null;
|
|
break;
|
|
}
|
|
}
|
|
foreach ($handlers as $h) {
|
|
set_exception_handler($h);
|
|
}
|
|
if (!$handler) {
|
|
return;
|
|
}
|
|
if ($handler !== $h) {
|
|
$handler[0]->setExceptionHandler($h);
|
|
}
|
|
$handler = $handler[0];
|
|
$handlers = [];
|
|
|
|
if ($exit = null === $error) {
|
|
$error = error_get_last();
|
|
}
|
|
|
|
if ($error && $error['type'] &= E_PARSE | E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR) {
|
|
// Let's not throw anymore but keep logging
|
|
$handler->throwAt(0, true);
|
|
$trace = isset($error['backtrace']) ? $error['backtrace'] : null;
|
|
|
|
if (0 === strpos($error['message'], 'Allowed memory') || 0 === strpos($error['message'], 'Out of memory')) {
|
|
$exception = new OutOfMemoryException($handler->levels[$error['type']].': '.$error['message'], 0, $error['type'], $error['file'], $error['line'], 2, false, $trace);
|
|
} else {
|
|
$exception = new FatalErrorException($handler->levels[$error['type']].': '.$error['message'], 0, $error['type'], $error['file'], $error['line'], 2, true, $trace);
|
|
}
|
|
} else {
|
|
$exception = null;
|
|
}
|
|
|
|
try {
|
|
if (null !== $exception) {
|
|
self::$exitCode = 255;
|
|
$handler->handleException($exception, $error);
|
|
}
|
|
} catch (FatalErrorException $e) {
|
|
// Ignore this re-throw
|
|
}
|
|
|
|
if ($exit && self::$exitCode) {
|
|
$exitCode = self::$exitCode;
|
|
register_shutdown_function('register_shutdown_function', function () use ($exitCode) { exit($exitCode); });
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Gets the fatal error handlers.
|
|
*
|
|
* Override this method if you want to define more fatal error handlers.
|
|
*
|
|
* @return FatalErrorHandlerInterface[] An array of FatalErrorHandlerInterface
|
|
*/
|
|
protected function getFatalErrorHandlers()
|
|
{
|
|
return [
|
|
new UndefinedFunctionFatalErrorHandler(),
|
|
new UndefinedMethodFatalErrorHandler(),
|
|
new ClassNotFoundFatalErrorHandler(),
|
|
];
|
|
}
|
|
|
|
/**
|
|
* Cleans the trace by removing function arguments and the frames added by the error handler and DebugClassLoader.
|
|
*/
|
|
private function cleanTrace($backtrace, $type, $file, $line, $throw)
|
|
{
|
|
$lightTrace = $backtrace;
|
|
|
|
for ($i = 0; isset($backtrace[$i]); ++$i) {
|
|
if (isset($backtrace[$i]['file'], $backtrace[$i]['line']) && $backtrace[$i]['line'] === $line && $backtrace[$i]['file'] === $file) {
|
|
$lightTrace = \array_slice($lightTrace, 1 + $i);
|
|
break;
|
|
}
|
|
}
|
|
if (class_exists(DebugClassLoader::class, false)) {
|
|
for ($i = \count($lightTrace) - 2; 0 < $i; --$i) {
|
|
if (DebugClassLoader::class === ($lightTrace[$i]['class'] ?? null)) {
|
|
array_splice($lightTrace, --$i, 2);
|
|
}
|
|
}
|
|
}
|
|
if (!($throw || $this->scopedErrors & $type)) {
|
|
for ($i = 0; isset($lightTrace[$i]); ++$i) {
|
|
unset($lightTrace[$i]['args'], $lightTrace[$i]['object']);
|
|
}
|
|
}
|
|
|
|
return $lightTrace;
|
|
}
|
|
}
|