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MemoryLimiter.php
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MemoryLimiter.php
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<?php
/**
* This code is licensed under the BSD 3-Clause License.
*
* Copyright (c) 2017, Maks Rafalko
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
declare(strict_types=1);
namespace Infection\Resource\Memory;
use Infection\AbstractTestFramework\MemoryUsageAware;
use Infection\AbstractTestFramework\TestFrameworkAdapter;
use const PHP_EOL;
use function Safe\sprintf;
use Symfony\Component\Filesystem\Exception\IOException;
use Symfony\Component\Filesystem\Filesystem;
/**
* @internal
* @final
*/
class MemoryLimiter
{
private $fileSystem;
private $phpIniPath;
private $environment;
public function __construct(
Filesystem $fileSystem,
string $phpIniPath,
MemoryLimiterEnvironment $environment
) {
$this->fileSystem = $fileSystem;
$this->phpIniPath = $phpIniPath;
$this->environment = $environment;
}
public function limitMemory(string $processOutput, TestFrameworkAdapter $adapter): void
{
if (!$adapter instanceof MemoryUsageAware
|| $this->environment->hasMemoryLimitSet()
|| $this->environment->isUsingSystemIni()
) {
return;
}
$tmpConfigPath = $this->phpIniPath;
if ($tmpConfigPath === '') {
// Cannot add a memory limit: there is no php.ini file
return;
}
if (!$this->fileSystem->exists($tmpConfigPath)) {
// Cannot add a memory limit: there is no php.ini file
return;
}
$memoryLimit = $adapter->getMemoryUsed($processOutput);
if ($memoryLimit === -1.) {
// Cannot detect memory used, not setting any limits
return;
}
/*
* Since we know how much memory the initial test suite used, and only if we know, we can
* enforce a memory limit upon all mutation processes. Limit is set to be twice the known
* amount, because if we know that a normal test suite used X megabytes, if a mutants uses a
* lot more, this is a definite error.
*
* By default we let a mutant process use twice as much more memory as an initial test suite
* consumed.
*/
$memoryLimit *= 2;
try {
$this->fileSystem->appendToFile(
$tmpConfigPath,
PHP_EOL . sprintf('memory_limit = %dM', $memoryLimit)
);
} catch (IOException $exception) {
// Cannot add a memory limit: file is not writable
}
}
}