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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\Elf\SymbolResolver; |
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use PhpProfiler\Lib\Binary\BinaryReader; |
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use PhpProfiler\Lib\Binary\ProcessMemoryByteReader; |
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use PhpProfiler\Lib\Binary\StringByteReader; |
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use PhpProfiler\Lib\Elf\Parser\Elf64Parser; |
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use PhpProfiler\Lib\Elf\Parser\ElfParserException; |
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use PhpProfiler\Lib\File\FileReaderInterface; |
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use PhpProfiler\Lib\Process\MemoryMap\ProcessMemoryArea; |
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use PhpProfiler\Lib\Process\MemoryReader\MemoryReaderInterface; |
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/** |
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* Class SymbolResolverCreator |
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* @package PhpProfiler\Lib\Elf |
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*/ |
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final class Elf64SymbolResolverCreator implements SymbolResolverCreatorInterface |
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{ |
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private FileReaderInterface $file_reader; |
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/** |
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* SymbolResolverCreator constructor. |
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* @param FileReaderInterface $file_reader |
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*/ |
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public function __construct(FileReaderInterface $file_reader) |
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{ |
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$this->file_reader = $file_reader; |
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} |
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/** |
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* @param string $path |
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* @return Elf64LinearScanSymbolResolver |
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* @throws ElfParserException |
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*/ |
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public function createLinearScanResolverFromPath(string $path): Elf64LinearScanSymbolResolver |
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{ |
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$binary_raw = $this->file_reader->readAll($path); |
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if ($binary_raw === '') { |
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throw new ElfParserException('cannot read ELF binary'); |
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} |
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$binary = new StringByteReader($binary_raw); |
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$parser = new Elf64Parser(new BinaryReader()); |
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$elf_header = $parser->parseElfHeader($binary); |
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$section_header = $parser->parseSectionHeader($binary, $elf_header); |
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$symbol_table_section_header_entry = $section_header->findSymbolTableEntry(); |
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$string_table_section_header_entry = $section_header->findStringTableEntry(); |
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if (is_null($symbol_table_section_header_entry)) { |
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throw new ElfParserException('cannot find symbol table from section header table'); |
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} |
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if (is_null($string_table_section_header_entry)) { |
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throw new ElfParserException('cannot find string table from section header table'); |
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} |
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$symbol_table = $parser->parseSymbolTableFromSectionHeader($binary, $symbol_table_section_header_entry); |
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$string_table = $parser->parseStringTableFromSectionHeader($binary, $string_table_section_header_entry); |
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return new Elf64LinearScanSymbolResolver($symbol_table, $string_table); |
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} |
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/** |
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* @param string $path |
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* @return Elf64DynamicSymbolResolver |
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* @throws ElfParserException |
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*/ |
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public function createDynamicResolverFromPath(string $path): Elf64DynamicSymbolResolver |
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{ |
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$binary_raw = $this->file_reader->readAll($path); |
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if ($binary_raw === '') { |
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throw new ElfParserException('cannot read ELF binary'); |
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} |
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$binary = new StringByteReader($binary_raw); |
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$parser = new Elf64Parser(new BinaryReader()); |
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return Elf64DynamicSymbolResolver::load($parser, $binary); |
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} |
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/** |
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* @param MemoryReaderInterface $memory_reader |
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* @param int $pid |
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* @param ProcessMemoryArea[] $memory_area |
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* @return Elf64DynamicSymbolResolver |
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* @throws ElfParserException |
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*/ |
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public function createDynamicResolverFromProcessMemory( |
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MemoryReaderInterface $memory_reader, |
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int $pid, |
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array $memory_area |
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): Elf64DynamicSymbolResolver { |
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$php_binary = new ProcessMemoryByteReader($memory_reader, $pid, $memory_area); |
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$parser = new Elf64Parser(new BinaryReader()); |
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$elf_header = $parser->parseElfHeader($php_binary); |
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$elf_program_header = $parser->parseProgramHeader($php_binary, $elf_header); |
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$elf_dynamic_array = $parser->parseDynamicStructureArray($php_binary, $elf_program_header->findDynamic()[0]); |
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$php_binary->toggle(true); |
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$elf_string_table = $parser->parseStringTable($php_binary, $elf_dynamic_array); |
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$elf_gnu_hash_table = $parser->parseGnuHashTable($php_binary, $elf_dynamic_array); |
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if (is_null($elf_gnu_hash_table)) { |
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throw new ElfParserException('cannot find gnu hash table'); |
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} |
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$elf_symbol_table = $parser->parseSymbolTableFromDynamic( |
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$php_binary, |
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$elf_dynamic_array, |
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$elf_gnu_hash_table->getNumberOfSymbols() |
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); |
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$php_binary->toggle(false); |
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return new Elf64DynamicSymbolResolver( |
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$elf_symbol_table, |
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$elf_gnu_hash_table, |
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$elf_string_table |
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); |
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} |
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} |
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sj-i /
php-profiler
