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ExceptionCaster.php
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/
ExceptionCaster.php
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\VarDumper\Caster;
use Symfony\Component\ErrorHandler\Exception\SilencedErrorContext;
use Symfony\Component\VarDumper\Cloner\Stub;
use Symfony\Component\VarDumper\Exception\ThrowingCasterException;
/**
* Casts common Exception classes to array representation.
*
* @author Nicolas Grekas <p@tchwork.com>
*
* @final
*/
class ExceptionCaster
{
public static $srcContext = 1;
public static $traceArgs = true;
public static $errorTypes = [
E_DEPRECATED => 'E_DEPRECATED',
E_USER_DEPRECATED => 'E_USER_DEPRECATED',
E_RECOVERABLE_ERROR => 'E_RECOVERABLE_ERROR',
E_ERROR => 'E_ERROR',
E_WARNING => 'E_WARNING',
E_PARSE => 'E_PARSE',
E_NOTICE => 'E_NOTICE',
E_CORE_ERROR => 'E_CORE_ERROR',
E_CORE_WARNING => 'E_CORE_WARNING',
E_COMPILE_ERROR => 'E_COMPILE_ERROR',
E_COMPILE_WARNING => 'E_COMPILE_WARNING',
E_USER_ERROR => 'E_USER_ERROR',
E_USER_WARNING => 'E_USER_WARNING',
E_USER_NOTICE => 'E_USER_NOTICE',
E_STRICT => 'E_STRICT',
];
private static $framesCache = [];
public static function castError(\Error $e, array $a, Stub $stub, bool $isNested, int $filter = 0)
{
return self::filterExceptionArray($stub->class, $a, "\0Error\0", $filter);
}
public static function castException(\Exception $e, array $a, Stub $stub, bool $isNested, int $filter = 0)
{
return self::filterExceptionArray($stub->class, $a, "\0Exception\0", $filter);
}
public static function castErrorException(\ErrorException $e, array $a, Stub $stub, bool $isNested)
{
if (isset($a[$s = Caster::PREFIX_PROTECTED.'severity'], self::$errorTypes[$a[$s]])) {
$a[$s] = new ConstStub(self::$errorTypes[$a[$s]], $a[$s]);
}
return $a;
}
public static function castThrowingCasterException(ThrowingCasterException $e, array $a, Stub $stub, bool $isNested)
{
$trace = Caster::PREFIX_VIRTUAL.'trace';
$prefix = Caster::PREFIX_PROTECTED;
$xPrefix = "\0Exception\0";
if (isset($a[$xPrefix.'previous'], $a[$trace]) && $a[$xPrefix.'previous'] instanceof \Exception) {
$b = (array) $a[$xPrefix.'previous'];
$class = get_debug_type($a[$xPrefix.'previous']);
self::traceUnshift($b[$xPrefix.'trace'], $class, $b[$prefix.'file'], $b[$prefix.'line']);
$a[$trace] = new TraceStub($b[$xPrefix.'trace'], false, 0, -\count($a[$trace]->value));
}
unset($a[$xPrefix.'previous'], $a[$prefix.'code'], $a[$prefix.'file'], $a[$prefix.'line']);
return $a;
}
public static function castSilencedErrorContext(SilencedErrorContext $e, array $a, Stub $stub, bool $isNested)
{
$sPrefix = "\0".SilencedErrorContext::class."\0";
if (!isset($a[$s = $sPrefix.'severity'])) {
return $a;
}
if (isset(self::$errorTypes[$a[$s]])) {
$a[$s] = new ConstStub(self::$errorTypes[$a[$s]], $a[$s]);
}
$trace = [[
'file' => $a[$sPrefix.'file'],
'line' => $a[$sPrefix.'line'],
]];
if (isset($a[$sPrefix.'trace'])) {
$trace = array_merge($trace, $a[$sPrefix.'trace']);
}
unset($a[$sPrefix.'file'], $a[$sPrefix.'line'], $a[$sPrefix.'trace']);
$a[Caster::PREFIX_VIRTUAL.'trace'] = new TraceStub($trace, self::$traceArgs);
return $a;
}
public static function castTraceStub(TraceStub $trace, array $a, Stub $stub, bool $isNested)
{
if (!$isNested) {
return $a;
}
$stub->class = '';
$stub->handle = 0;
$frames = $trace->value;
$prefix = Caster::PREFIX_VIRTUAL;
$a = [];
$j = \count($frames);
if (0 > $i = $trace->sliceOffset) {
$i = max(0, $j + $i);
}
if (!isset($trace->value[$i])) {
return [];
}
$lastCall = isset($frames[$i]['function']) ? (isset($frames[$i]['class']) ? $frames[0]['class'].$frames[$i]['type'] : '').$frames[$i]['function'].'()' : '';
$frames[] = ['function' => ''];
$collapse = false;
for ($j += $trace->numberingOffset - $i++; isset($frames[$i]); ++$i, --$j) {
$f = $frames[$i];
$call = isset($f['function']) ? (isset($f['class']) ? $f['class'].$f['type'] : '').$f['function'] : '???';
$frame = new FrameStub(
[
'object' => isset($f['object']) ? $f['object'] : null,
'class' => isset($f['class']) ? $f['class'] : null,
'type' => isset($f['type']) ? $f['type'] : null,
'function' => isset($f['function']) ? $f['function'] : null,
] + $frames[$i - 1],
false,
true
);
$f = self::castFrameStub($frame, [], $frame, true);
if (isset($f[$prefix.'src'])) {
foreach ($f[$prefix.'src']->value as $label => $frame) {
if (0 === strpos($label, "\0~collapse=0")) {
if ($collapse) {
$label = substr_replace($label, '1', 11, 1);
} else {
$collapse = true;
}
}
$label = substr_replace($label, "title=Stack level $j.&", 2, 0);
}
$f = $frames[$i - 1];
if ($trace->keepArgs && !empty($f['args']) && $frame instanceof EnumStub) {
$frame->value['arguments'] = new ArgsStub($f['args'], isset($f['function']) ? $f['function'] : null, isset($f['class']) ? $f['class'] : null);
}
} elseif ('???' !== $lastCall) {
$label = new ClassStub($lastCall);
if (isset($label->attr['ellipsis'])) {
$label->attr['ellipsis'] += 2;
$label = substr_replace($prefix, "ellipsis-type=class&ellipsis={$label->attr['ellipsis']}&ellipsis-tail=1&title=Stack level $j.", 2, 0).$label->value.'()';
} else {
$label = substr_replace($prefix, "title=Stack level $j.", 2, 0).$label->value.'()';
}
} else {
$label = substr_replace($prefix, "title=Stack level $j.", 2, 0).$lastCall;
}
$a[substr_replace($label, sprintf('separator=%s&', $frame instanceof EnumStub ? ' ' : ':'), 2, 0)] = $frame;
$lastCall = $call;
}
if (null !== $trace->sliceLength) {
$a = \array_slice($a, 0, $trace->sliceLength, true);
}
return $a;
}
public static function castFrameStub(FrameStub $frame, array $a, Stub $stub, bool $isNested)
{
if (!$isNested) {
return $a;
}
$f = $frame->value;
$prefix = Caster::PREFIX_VIRTUAL;
if (isset($f['file'], $f['line'])) {
$cacheKey = $f;
unset($cacheKey['object'], $cacheKey['args']);
$cacheKey[] = self::$srcContext;
$cacheKey = implode('-', $cacheKey);
if (isset(self::$framesCache[$cacheKey])) {
$a[$prefix.'src'] = self::$framesCache[$cacheKey];
} else {
if (preg_match('/\((\d+)\)(?:\([\da-f]{32}\))? : (?:eval\(\)\'d code|runtime-created function)$/', $f['file'], $match)) {
$f['file'] = substr($f['file'], 0, -\strlen($match[0]));
$f['line'] = (int) $match[1];
}
$src = $f['line'];
$srcKey = $f['file'];
$ellipsis = new LinkStub($srcKey, 0);
$srcAttr = 'collapse='.(int) $ellipsis->inVendor;
$ellipsisTail = isset($ellipsis->attr['ellipsis-tail']) ? $ellipsis->attr['ellipsis-tail'] : 0;
$ellipsis = isset($ellipsis->attr['ellipsis']) ? $ellipsis->attr['ellipsis'] : 0;
if (is_file($f['file']) && 0 <= self::$srcContext) {
if (!empty($f['class']) && (is_subclass_of($f['class'], 'Twig\Template') || is_subclass_of($f['class'], 'Twig_Template')) && method_exists($f['class'], 'getDebugInfo')) {
$template = isset($f['object']) ? $f['object'] : unserialize(sprintf('O:%d:"%s":0:{}', \strlen($f['class']), $f['class']));
$ellipsis = 0;
$templateSrc = method_exists($template, 'getSourceContext') ? $template->getSourceContext()->getCode() : (method_exists($template, 'getSource') ? $template->getSource() : '');
$templateInfo = $template->getDebugInfo();
if (isset($templateInfo[$f['line']])) {
if (!method_exists($template, 'getSourceContext') || !is_file($templatePath = $template->getSourceContext()->getPath())) {
$templatePath = null;
}
if ($templateSrc) {
$src = self::extractSource($templateSrc, $templateInfo[$f['line']], self::$srcContext, 'twig', $templatePath, $f);
$srcKey = ($templatePath ?: $template->getTemplateName()).':'.$templateInfo[$f['line']];
}
}
}
if ($srcKey == $f['file']) {
$src = self::extractSource(file_get_contents($f['file']), $f['line'], self::$srcContext, 'php', $f['file'], $f);
$srcKey .= ':'.$f['line'];
if ($ellipsis) {
$ellipsis += 1 + \strlen($f['line']);
}
}
$srcAttr .= sprintf('&separator= &file=%s&line=%d', rawurlencode($f['file']), $f['line']);
} else {
$srcAttr .= '&separator=:';
}
$srcAttr .= $ellipsis ? '&ellipsis-type=path&ellipsis='.$ellipsis.'&ellipsis-tail='.$ellipsisTail : '';
self::$framesCache[$cacheKey] = $a[$prefix.'src'] = new EnumStub(["\0~$srcAttr\0$srcKey" => $src]);
}
}
unset($a[$prefix.'args'], $a[$prefix.'line'], $a[$prefix.'file']);
if ($frame->inTraceStub) {
unset($a[$prefix.'class'], $a[$prefix.'type'], $a[$prefix.'function']);
}
foreach ($a as $k => $v) {
if (!$v) {
unset($a[$k]);
}
}
if ($frame->keepArgs && !empty($f['args'])) {
$a[$prefix.'arguments'] = new ArgsStub($f['args'], $f['function'], $f['class']);
}
return $a;
}
private static function filterExceptionArray(string $xClass, array $a, string $xPrefix, int $filter): array
{
if (isset($a[$xPrefix.'trace'])) {
$trace = $a[$xPrefix.'trace'];
unset($a[$xPrefix.'trace']); // Ensures the trace is always last
} else {
$trace = [];
}
if (!($filter & Caster::EXCLUDE_VERBOSE) && $trace) {
if (isset($a[Caster::PREFIX_PROTECTED.'file'], $a[Caster::PREFIX_PROTECTED.'line'])) {
self::traceUnshift($trace, $xClass, $a[Caster::PREFIX_PROTECTED.'file'], $a[Caster::PREFIX_PROTECTED.'line']);
}
$a[Caster::PREFIX_VIRTUAL.'trace'] = new TraceStub($trace, self::$traceArgs);
}
if (empty($a[$xPrefix.'previous'])) {
unset($a[$xPrefix.'previous']);
}
unset($a[$xPrefix.'string'], $a[Caster::PREFIX_DYNAMIC.'xdebug_message'], $a[Caster::PREFIX_DYNAMIC.'__destructorException']);
if (isset($a[Caster::PREFIX_PROTECTED.'message']) && false !== strpos($a[Caster::PREFIX_PROTECTED.'message'], "@anonymous\0")) {
$a[Caster::PREFIX_PROTECTED.'message'] = preg_replace_callback('/[a-zA-Z_\x7f-\xff][\\\\a-zA-Z0-9_\x7f-\xff]*+@anonymous\x00.*?\.php(?:0x?|:[0-9]++\$)[0-9a-fA-F]++/', function ($m) {
return class_exists($m[0], false) ? (get_parent_class($m[0]) ?: key(class_implements($m[0])) ?: 'class').'@anonymous' : $m[0];
}, $a[Caster::PREFIX_PROTECTED.'message']);
}
if (isset($a[Caster::PREFIX_PROTECTED.'file'], $a[Caster::PREFIX_PROTECTED.'line'])) {
$a[Caster::PREFIX_PROTECTED.'file'] = new LinkStub($a[Caster::PREFIX_PROTECTED.'file'], $a[Caster::PREFIX_PROTECTED.'line']);
}
return $a;
}
private static function traceUnshift(array &$trace, ?string $class, string $file, int $line): void
{
if (isset($trace[0]['file'], $trace[0]['line']) && $trace[0]['file'] === $file && $trace[0]['line'] === $line) {
return;
}
array_unshift($trace, [
'function' => $class ? 'new '.$class : null,
'file' => $file,
'line' => $line,
]);
}
private static function extractSource(string $srcLines, int $line, int $srcContext, string $lang, ?string $file, array $frame): EnumStub
{
$srcLines = explode("\n", $srcLines);
$src = [];
for ($i = $line - 1 - $srcContext; $i <= $line - 1 + $srcContext; ++$i) {
$src[] = (isset($srcLines[$i]) ? $srcLines[$i] : '')."\n";
}
if ($frame['function'] ?? false) {
$stub = new CutStub(new \stdClass());
$stub->class = (isset($frame['class']) ? $frame['class'].$frame['type'] : '').$frame['function'];
$stub->type = Stub::TYPE_OBJECT;
$stub->attr['cut_hash'] = true;
$stub->attr['file'] = $frame['file'];
$stub->attr['line'] = $frame['line'];
try {
$caller = isset($frame['class']) ? new \ReflectionMethod($frame['class'], $frame['function']) : new \ReflectionFunction($frame['function']);
$stub->class .= ReflectionCaster::getSignature(ReflectionCaster::castFunctionAbstract($caller, [], $stub, true, Caster::EXCLUDE_VERBOSE));
if ($f = $caller->getFileName()) {
$stub->attr['file'] = $f;
$stub->attr['line'] = $caller->getStartLine();
}
} catch (\ReflectionException $e) {
// ignore fake class/function
}
$srcLines = ["\0~separator=\0" => $stub];
} else {
$stub = null;
$srcLines = [];
}
$ltrim = 0;
do {
$pad = null;
for ($i = $srcContext << 1; $i >= 0; --$i) {
if (isset($src[$i][$ltrim]) && "\r" !== ($c = $src[$i][$ltrim]) && "\n" !== $c) {
if (null === $pad) {
$pad = $c;
}
if ((' ' !== $c && "\t" !== $c) || $pad !== $c) {
break;
}
}
}
++$ltrim;
} while (0 > $i && null !== $pad);
--$ltrim;
foreach ($src as $i => $c) {
if ($ltrim) {
$c = isset($c[$ltrim]) && "\r" !== $c[$ltrim] ? substr($c, $ltrim) : ltrim($c, " \t");
}
$c = substr($c, 0, -1);
if ($i !== $srcContext) {
$c = new ConstStub('default', $c);
} else {
$c = new ConstStub($c, $stub ? 'in '.$stub->class : '');
if (null !== $file) {
$c->attr['file'] = $file;
$c->attr['line'] = $line;
}
}
$c->attr['lang'] = $lang;
$srcLines[sprintf("\0~separator=› &%d\0", $i + $line - $srcContext)] = $c;
}
return new EnumStub($srcLines);
}
}