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<?php |
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/** |
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* This file is part of the sj-i/php-profiler package. |
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* |
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* (c) sji <[email protected]> |
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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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declare(strict_types=1); |
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namespace PhpProfiler\Lib\PhpProcessReader; |
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use PhpProfiler\Lib\ByteStream\IntegerByteSequence\IntegerByteSequenceReader; |
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use PhpProfiler\Lib\ByteStream\CDataByteReader; |
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use PhpProfiler\Lib\Elf\Parser\ElfParserException; |
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use PhpProfiler\Lib\Elf\Process\ProcessSymbolReaderException; |
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use PhpProfiler\Lib\Elf\Process\ProcessSymbolReaderInterface; |
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use PhpProfiler\Lib\Elf\Tls\TlsFinderException; |
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use PhpProfiler\Lib\Process\MemoryReader\MemoryReaderException; |
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use RuntimeException; |
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/** |
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* Class PhpGlobalsFinder |
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* @package PhpProfiler\ProcessReader |
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*/ |
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final class PhpGlobalsFinder |
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{ |
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private ?int $tsrm_ls_cache = null; |
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private bool $tsrm_ls_cache_not_found = false; |
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private IntegerByteSequenceReader $integer_reader; |
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private PhpSymbolReaderCreator $php_symbol_reader_creator; |
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/** @var ProcessSymbolReaderInterface[] */ |
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private array $php_symbol_reader_cache = []; |
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/** |
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* PhpGlobalsFinder constructor. |
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* @param PhpSymbolReaderCreator $php_symbol_reader_creator |
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* @param IntegerByteSequenceReader $integer_reader |
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*/ |
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public function __construct( |
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PhpSymbolReaderCreator $php_symbol_reader_creator, |
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IntegerByteSequenceReader $integer_reader |
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) { |
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$this->php_symbol_reader_creator = $php_symbol_reader_creator; |
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$this->integer_reader = $integer_reader; |
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} |
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/** |
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* @param int $pid |
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* @return int |
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* @throws ElfParserException |
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* @throws MemoryReaderException |
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* @throws ProcessSymbolReaderException |
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* @throws TlsFinderException |
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*/ |
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public function findTsrmLsCache(int $pid): ?int |
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{ |
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if (!isset($this->tsrm_ls_cache) and !$this->tsrm_ls_cache_not_found) { |
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$tsrm_lm_cache_cdata = $this->getSymbolReader($pid)->read('_tsrm_ls_cache'); |
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if (isset($tsrm_lm_cache_cdata)) { |
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$this->tsrm_ls_cache = $this->integer_reader->read64( |
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new CDataByteReader($tsrm_lm_cache_cdata), |
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0 |
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)->toInt(); |
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} else { |
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$this->tsrm_ls_cache_not_found = true; |
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} |
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} |
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return $this->tsrm_ls_cache; |
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} |
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/** |
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* @param int $pid |
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* @return ProcessSymbolReaderInterface |
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* @throws ProcessSymbolReaderException |
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* @throws ElfParserException |
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* @throws TlsFinderException |
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* @throws MemoryReaderException |
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*/ |
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public function getSymbolReader(int $pid): ProcessSymbolReaderInterface |
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{ |
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if (!isset($this->php_symbol_reader_cache[$pid])) { |
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$this->php_symbol_reader_cache[$pid] = $this->php_symbol_reader_creator->create($pid); |
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} |
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return $this->php_symbol_reader_cache[$pid]; |
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} |
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/** |
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* @param int $pid |
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* @return int |
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* @throws ElfParserException |
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* @throws MemoryReaderException |
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* @throws ProcessSymbolReaderException |
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* @throws TlsFinderException |
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*/ |
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public function findExecutorGlobals(int $pid): int |
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{ |
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$tsrm_ls_cache = $this->findTsrmLsCache($pid); |
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if (isset($tsrm_ls_cache)) { |
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$executor_globals_offset_cdata = $this->getSymbolReader($pid)->read('executor_globals_offset'); |
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if (is_null($executor_globals_offset_cdata)) { |
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throw new RuntimeException('executor_globals_offset not found'); |
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} |
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$executor_globals_offset = $this->integer_reader->read64( |
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new CDataByteReader($executor_globals_offset_cdata), |
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0 |
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)->toInt(); |
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return $tsrm_ls_cache + $executor_globals_offset; |
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} |
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$executor_globals_address = $this->getSymbolReader($pid)->resolveAddress('executor_globals'); |
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if (is_null($executor_globals_address)) { |
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throw new RuntimeException('executor globals not found'); |
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} |
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return $executor_globals_address; |
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} |
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} |
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sj-i /
php-profiler
