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[Cache] fix memory leak when using PhpFilesAdapter #34896

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Merged
merged 1 commit into from
Dec 10, 2019
Merged

[Cache] fix memory leak when using PhpFilesAdapter #34896

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31 changes: 31 additions & 0 deletions 31 src/Symfony/Component/Cache/Tests/Adapter/PhpFilesAdapterAppendOnlyTest.php
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Original file line number Diff line number Diff line change
@@ -0,0 +1,31 @@
<?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\Cache\Tests\Adapter;

use Psr\Cache\CacheItemPoolInterface;
use Symfony\Component\Cache\Adapter\PhpFilesAdapter;

/**
* @group time-sensitive
*/
class PhpFilesAdapterAppendOnlyTest extends PhpFilesAdapterTest
{
protected $skippedTests = [
'testDefaultLifeTime' => 'PhpFilesAdapter does not allow configuring a default lifetime.',
'testExpiration' => 'PhpFilesAdapter in append-only mode does not expiration.',
];

public function createCachePool(): CacheItemPoolInterface
{
return new PhpFilesAdapter('sf-cache', 0, null, true);
}
}
6 changes: 3 additions & 3 deletions 6 src/Symfony/Component/Cache/Traits/FilesystemCommonTrait.php
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Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,7 @@ trait FilesystemCommonTrait
private function init($namespace, $directory)
{
if (!isset($directory[0])) {
$directory = sys_get_temp_dir().'/symfony-cache';
$directory = sys_get_temp_dir().\DIRECTORY_SEPARATOR.'symfony-cache';
} else {
$directory = realpath($directory) ?: $directory;
}
Expand Down Expand Up @@ -55,8 +55,8 @@ protected function doClear($namespace)
{
$ok = true;

foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($this->directory, \FilesystemIterator::SKIP_DOTS)) as $file) {
$ok = ($file->isDir() || $this->doUnlink($file) || !file_exists($file)) && $ok;
foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($this->directory, \FilesystemIterator::SKIP_DOTS | \FilesystemIterator::CURRENT_AS_PATHNAME), \RecursiveIteratorIterator::LEAVES_ONLY) as $file) {
$ok = ($this->doUnlink($file) || !file_exists($file)) && $ok;
}

return $ok;
Expand Down
35 changes: 26 additions & 9 deletions 35 src/Symfony/Component/Cache/Traits/PhpFilesTrait.php
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Expand Up @@ -35,12 +35,13 @@ trait PhpFilesTrait
private $files = [];

private static $startTime;
private static $valuesCache = [];

public static function isSupported()
{
self::$startTime = self::$startTime ?? $_SERVER['REQUEST_TIME'] ?? time();

return \function_exists('opcache_invalidate') && ('cli' !== \PHP_SAPI || filter_var(ini_get('opcache.enable_cli'), FILTER_VALIDATE_BOOLEAN)) && filter_var(ini_get('opcache.enable'), FILTER_VALIDATE_BOOLEAN);
return \function_exists('opcache_invalidate') && filter_var(ini_get('opcache.enable'), FILTER_VALIDATE_BOOLEAN) && (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) || filter_var(ini_get('opcache.enable_cli'), FILTER_VALIDATE_BOOLEAN));
}

/**
Expand All @@ -54,7 +55,7 @@ public function prune()

set_error_handler($this->includeHandler);
try {
foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($this->directory, \FilesystemIterator::SKIP_DOTS), \RecursiveIteratorIterator::LEAVES_ONLY) as $file) {
foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($this->directory, \FilesystemIterator::SKIP_DOTS | \FilesystemIterator::CURRENT_AS_PATHNAME), \RecursiveIteratorIterator::LEAVES_ONLY) as $file) {
try {
if (\is_array($expiresAt = include $file)) {
$expiresAt = $expiresAt[0];
Expand Down Expand Up @@ -100,7 +101,6 @@ protected function doFetch(array $ids)
} elseif (!\is_object($value)) {
$values[$id] = $value;
} elseif (!$value instanceof LazyValue) {
// calling a Closure is for @deprecated BC and should be removed in Symfony 5.0
$values[$id] = $value();
} elseif (false === $values[$id] = include $value->file) {
unset($values[$id], $this->values[$id]);
Expand All @@ -123,14 +123,20 @@ protected function doFetch(array $ids)
try {
$file = $this->files[$id] ?? $this->files[$id] = $this->getFile($id);

if (\is_array($expiresAt = include $file)) {
if (isset(self::$valuesCache[$file])) {
[$expiresAt, $this->values[$id]] = self::$valuesCache[$file];
} elseif (\is_array($expiresAt = include $file)) {
if ($this->appendOnly) {
self::$valuesCache[$file] = $expiresAt;
}

[$expiresAt, $this->values[$id]] = $expiresAt;
} elseif ($now < $expiresAt) {
$this->values[$id] = new LazyValue($file);
}

if ($now >= $expiresAt) {
unset($this->values[$id], $missingIds[$k]);
unset($this->values[$id], $missingIds[$k], self::$valuesCache[$file]);
}
} catch (\ErrorException $e) {
unset($missingIds[$k]);
Expand Down Expand Up @@ -159,7 +165,13 @@ protected function doHave($id)
$file = $this->files[$id] ?? $this->files[$id] = $this->getFile($id);
$getExpiry = true;

if (\is_array($expiresAt = include $file)) {
if (isset(self::$valuesCache[$file])) {
[$expiresAt, $value] = self::$valuesCache[$file];
} elseif (\is_array($expiresAt = include $file)) {
if ($this->appendOnly) {
self::$valuesCache[$file] = $expiresAt;
}

[$expiresAt, $value] = $expiresAt;
} elseif ($this->appendOnly) {
$value = new LazyValue($file);
Expand Down Expand Up @@ -211,12 +223,14 @@ protected function doSave(array $values, $lifetime)
$value = var_export($value, true);
}

if (!$isStaticValue) {
if ($isStaticValue) {
$value = "<?php return [{$expiry}, {$value}];\n";
} elseif ($this->appendOnly) {
$value = "<?php return [{$expiry}, static function () { return {$value}; }];\n";
} else {
// We cannot use a closure here because of https://bugs.php.net/76982
$value = str_replace('\Symfony\Component\VarExporter\Internal\\', '', $value);
$value = "<?php\n\nnamespace Symfony\Component\VarExporter\Internal;\n\nreturn \$getExpiry ? {$expiry} : {$value};\n";
} else {
$value = "<?php return [{$expiry}, {$value}];\n";
}

$file = $this->files[$key] = $this->getFile($key, true);
Expand All @@ -227,6 +241,7 @@ protected function doSave(array $values, $lifetime)
@opcache_invalidate($file, true);
@opcache_compile_file($file);
}
unset(self::$valuesCache[$file]);
}

if (!$ok && !is_writable($this->directory)) {
Expand Down Expand Up @@ -260,6 +275,8 @@ protected function doDelete(array $ids)

protected function doUnlink($file)
{
unset(self::$valuesCache[$file]);

if (self::isSupported()) {
@opcache_invalidate($file, true);
}
Expand Down
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