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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\PhpMemoryReader; |
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use FFI\CData; |
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use PhpProfiler\Lib\PhpInternals\ZendTypeReader; |
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use PhpProfiler\Lib\Process\MemoryReader\MemoryReaderInterface; |
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use PhpProfiler\Lib\Process\MemoryReader\MemoryReaderException; |
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/** |
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* Class ExecutorGlobalsReader |
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* @package PhpProfiler\ProcessReader\PhpStateReader |
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*/ |
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final class ExecutorGlobalsReader |
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{ |
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private MemoryReaderInterface $memory_reader; |
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private ZendTypeReader $zend_type_reader; |
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/** |
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* ExecutorGlobalsReader constructor. |
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* @param MemoryReaderInterface $memory_reader |
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* @param ZendTypeReader $zend_type_reader |
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*/ |
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public function __construct(MemoryReaderInterface $memory_reader, ZendTypeReader $zend_type_reader) |
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{ |
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$this->memory_reader = $memory_reader; |
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$this->zend_type_reader = $zend_type_reader; |
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} |
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/** |
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* @param int $pid |
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* @param int $executor_globals_address |
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* @return string |
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* @throws MemoryReaderException |
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*/ |
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public function readCurrentFunctionName(int $pid, int $executor_globals_address): string |
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{ |
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/** @var \FFI\PhpInternals\zend_executor_globals $eg */ |
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$eg = $this->readExecutorGlobals($pid, $executor_globals_address); |
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/** @var \FFI\PhpInternals\zend_execute_data $current_execute_data */ |
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$current_execute_data = $this->readCurrentExecuteData($pid, $eg); |
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/** @var \FFI\PhpInternals\zend_function $current_function */ |
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$current_function = $this->readCurrentFunction($pid, $current_execute_data); |
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return $this->readFunctionName($pid, $current_function); |
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} |
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/** |
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* @param int $pid |
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* @param int $executor_globals_address |
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* @return CData |
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* @throws MemoryReaderException |
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*/ |
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public function readExecutorGlobals(int $pid, int $executor_globals_address): CData |
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{ |
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$eg_raw = $this->memory_reader->read( |
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$pid, |
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$executor_globals_address, |
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$this->zend_type_reader->sizeOf('zend_executor_globals') |
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); |
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return $this->zend_type_reader->readAs('zend_executor_globals', $eg_raw); |
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} |
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/** |
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* @param int $pid |
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* @param CData $eg |
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* @return CData |
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* @throws MemoryReaderException |
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*/ |
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public function readCurrentExecuteData(int $pid, CData $eg): CData |
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{ |
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/** |
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* @var \FFI\CPointer $current_execute_data_addr |
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* @var \FFI\PhpInternals\zend_executor_globals $eg |
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*/ |
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$current_execute_data_addr = \FFI::cast('long', $eg->current_execute_data); |
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$current_execute_data_raw = $this->memory_reader->read( |
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$pid, |
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$current_execute_data_addr->cdata, |
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$this->zend_type_reader->sizeOf('zend_execute_data') |
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); |
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return clone $this->zend_type_reader->readAs('zend_execute_data', $current_execute_data_raw); |
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} |
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/** |
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* @param int $pid |
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* @param CData $current_execute_data |
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* @return CData |
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* @throws MemoryReaderException |
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*/ |
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public function readCurrentFunction(int $pid, CData $current_execute_data): CData |
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{ |
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/** |
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* @var \FFI\CPointer $func_pointer |
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* @var \FFI\PhpInternals\zend_execute_data $current_execute_data |
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*/ |
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$func_pointer = \FFI::cast('long', $current_execute_data->func); |
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$current_function_raw = $this->memory_reader->read( |
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$pid, |
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$func_pointer->cdata, |
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$this->zend_type_reader->sizeOf('zend_function') |
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); |
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return clone $this->zend_type_reader->readAs('zend_function', $current_function_raw); |
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} |
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/** |
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* @param int $pid |
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* @param CData $current_function |
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* @return string |
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* @throws MemoryReaderException |
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*/ |
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public function readFunctionName(int $pid, CData $current_function): string |
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{ |
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$function_name = '<main>'; |
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$class_name = ''; |
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/** |
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* @psalm-var \FFI\PhpInternals\zend_function $current_function |
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* @psalm-var \FFI\CPointer $current_function_name_pointer |
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*/ |
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$current_function_name_pointer = \FFI::cast('long', $current_function->common->function_name); |
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if ($current_function_name_pointer->cdata !== 0) { |
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/** @var \FFI\CPointer $current_function_name_pointer */ |
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$current_function_name_zstring = $this->memory_reader->read( |
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$pid, |
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$current_function_name_pointer->cdata, |
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$this->zend_type_reader->sizeOf('zend_string') + 256 |
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); |
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/** @var \FFI\PhpInternals\zend_string $string */ |
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$string = $this->zend_type_reader->readAs('zend_string', $current_function_name_zstring); |
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$function_name = \FFI::string($string->val); |
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/** @var \FFI\CPointer $current_function_scope_pointer */ |
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$current_function_scope_pointer = \FFI::cast('long', $current_function->common->scope); |
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if ($current_function_scope_pointer->cdata !== 0) { |
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$current_function_class_entry = $this->memory_reader->read( |
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$pid, |
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$current_function_scope_pointer->cdata, |
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$this->zend_type_reader->sizeOf('zend_class_entry') |
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); |
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/** @var \FFI\PhpInternals\zend_class_entry $class_entry */ |
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$class_entry = $this->zend_type_reader->readAs('zend_class_entry', $current_function_class_entry); |
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$current_class_name_pointer = \FFI::cast('long', $class_entry->name); |
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/** @var \FFI\CPointer $current_class_name_pointer */ |
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$current_class_name_zstring = $this->memory_reader->read( |
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$pid, |
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$current_class_name_pointer->cdata, |
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$this->zend_type_reader->sizeOf('zend_string') + 256 |
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); |
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/** @var \FFI\PhpInternals\zend_string $class_name_string */ |
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$class_name_string = $this->zend_type_reader->readAs('zend_string', $current_class_name_zstring); |
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$class_name = \FFI::string($class_name_string->val) . '::'; |
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} |
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} |
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return $class_name . $function_name; |
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} |
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/** |
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* @param int $pid |
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* @param CData $current_function |
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* @return string |
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* @throws MemoryReaderException |
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*/ |
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public function readFunctionFile(int $pid, CData $current_function): string |
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{ |
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/** @psalm-var \FFI\PhpInternals\zend_function $current_function */ |
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$filename = '<internal>'; |
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if ($current_function->type === 2) { |
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$filename_pointer = \FFI::cast('long', $current_function->op_array->filename); |
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/** @var \FFI\CPointer $filename_pointer */ |
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$filename_zstring_raw = $this->memory_reader->read( |
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$pid, |
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$filename_pointer->cdata, |
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$this->zend_type_reader->sizeOf('zend_string') + 256 |
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); |
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/** @var \FFI\PhpInternals\zend_string $filename_zstring */ |
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$filename_zstring = $this->zend_type_reader->readAs('zend_string', $filename_zstring_raw); |
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$filename = \FFI::string($filename_zstring->val); |
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} |
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return $filename; |
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} |
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/** |
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* @param int $pid |
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* @param int $executor_globals_address |
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* @param int $depth |
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* @return string[] |
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* @throws MemoryReaderException |
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*/ |
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public function readCallTrace(int $pid, int $executor_globals_address, int $depth): array |
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{ |
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/** @var \FFI\PhpInternals\zend_executor_globals $eg */ |
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$eg = $this->readExecutorGlobals($pid, $executor_globals_address); |
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/** @var \FFI\PhpInternals\zend_execute_data $current_execute_data */ |
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$current_execute_data = $this->readCurrentExecuteData($pid, $eg); |
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$stack = []; |
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$stack[] = $current_execute_data; |
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for ($i = 0; $i < $depth; $i++) { |
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$current_execute_data = $this->readPreviousExecuteData($pid, $current_execute_data); |
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if (is_null($current_execute_data)) { |
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break; |
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} |
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$stack[] = $current_execute_data; |
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} |
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$result = []; |
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foreach ($stack as $current_execute_data) { |
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/** @var \FFI\PhpInternals\zend_function $current_function */ |
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$current_function = $this->readCurrentFunction($pid, $current_execute_data); |
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$lineno = -1; |
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$file = $this->readFunctionFile($pid, $current_function); |
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if ($file !== '<internal>') { |
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$lineno = $this->readOpline($pid, $current_execute_data); |
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} |
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$result[] = $this->readFunctionName($pid, $current_function) . " {$file}({$lineno})"; |
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} |
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return $result; |
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} |
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/** |
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* @param int $pid |
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* @param CData $execute_data |
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* @return CData |
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* @throws MemoryReaderException |
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*/ |
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public function readPreviousExecuteData(int $pid, CData $execute_data): ?CData |
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{ |
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/** |
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* @var \FFI\CPointer $previous_execute_data_addr |
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* @var \FFI\PhpInternals\zend_execute_data $execute_data |
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*/ |
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$previous_execute_data_addr = \FFI::cast('long', $execute_data->prev_execute_data); |
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if ($previous_execute_data_addr->cdata == 0) { |
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return null; |
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} |
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$previous_execute_data_raw = $this->memory_reader->read( |
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$pid, |
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$previous_execute_data_addr->cdata, |
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$this->zend_type_reader->sizeOf('zend_execute_data') |
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); |
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return clone $this->zend_type_reader->readAs('zend_execute_data', $previous_execute_data_raw); |
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} |
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/** |
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* @param int $pid |
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* @param CData $current_execute_data |
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* @return int |
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* @throws MemoryReaderException |
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*/ |
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public function readOpline(int $pid, CData $current_execute_data): int |
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{ |
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/** |
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* @psalm-var \FFI\CPointer $opline_addr |
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* @psalm-var \FFI\PhpInternals\zend_execute_data $current_execute_data |
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*/ |
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$opline_addr = \FFI::cast('long', $current_execute_data->opline); |
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if ($opline_addr->cdata == 0) { |
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return -1; |
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} |
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$opline_raw = $this->memory_reader->read( |
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$pid, |
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$opline_addr->cdata + 24, |
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4 |
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); |
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return $opline_raw[0] |
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+ ($opline_raw[1] << 9) |
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+ ($opline_raw[2] << 16) |
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+ ($opline_raw[3] << 24); |
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} |
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} |
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sj-i /
php-profiler
Loading history...
This check compares calls to functions or methods with their respective definitions. If the call has less arguments than are defined, it raises an issue.
If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. Please note the @ignore annotation hint above.