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8d3f8ca12a
The $Id$ keywords were used in Subversion where they can be substituted with filename, last revision number change, last changed date, and last user who changed it. In Git this functionality is different and can be done with Git attribute ident. These need to be defined manually for each file in the .gitattributes file and are afterwards replaced with 40-character hexadecimal blob object name which is based only on the particular file contents. This patch simplifies handling of $Id$ keywords by removing them since they are not used anymore.
378 lines
11 KiB
PHP
378 lines
11 KiB
PHP
<?php
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/*
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+----------------------------------------------------------------------+
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| PHP Version 7 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2018 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Author: Nuno Lopes <nlopess@php.net> |
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+----------------------------------------------------------------------+
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*/
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define('REPORT_LEVEL', 1); // 0 reports less false-positives. up to level 5.
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define('VERSION', '7.0'); // minimum is 7.0
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define('PHPDIR', realpath(dirname(__FILE__) . '/../..'));
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// be sure you have enough memory and stack for PHP. pcre will push the limits!
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ini_set('pcre.backtrack_limit', 10000000);
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// ------------------------ end of config ----------------------------
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$API_params = array(
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'a' => array('zval**'), // array
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'A' => array('zval**'), // array or object
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'b' => array('zend_bool*'), // boolean
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'd' => array('double*'), // double
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'f' => array('zend_fcall_info*', 'zend_fcall_info_cache*'), // function
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'h' => array('HashTable**'), // array as an HashTable*
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'H' => array('HashTable**'), // array or HASH_OF(object)
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'l' => array('zend_long*'), // long
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//TODO 'L' => array('zend_long*, '), // long
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'o' => array('zval**'), //object
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'O' => array('zval**', 'zend_class_entry*'), // object of given type
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'P' => array('zend_string**'), // valid path
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'r' => array('zval**'), // resource
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'S' => array('zend_string**'), // string
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'z' => array('zval**'), // zval*
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'Z' => array('zval***') // zval**
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// 's', 'p', 'C' handled separately
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);
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/** reports an error, according to its level */
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function error($str, $level = 0)
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{
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global $current_file, $current_function, $line;
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if ($level <= REPORT_LEVEL) {
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if (strpos($current_file,PHPDIR) === 0) {
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$filename = substr($current_file, strlen(PHPDIR)+1);
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} else {
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$filename = $current_file;
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}
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echo $filename , " [$line] $current_function : $str\n";
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}
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}
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/** this updates the global var $line (for error reporting) */
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function update_lineno($offset)
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{
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global $lines_offset, $line;
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$left = 0;
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$right = $count = count($lines_offset)-1;
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// a nice binary search :)
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do {
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$mid = intval(($left + $right)/2);
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$val = $lines_offset[$mid];
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if ($val < $offset) {
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if (++$mid > $count || $lines_offset[$mid] > $offset) {
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$line = $mid;
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return;
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} else {
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$left = $mid;
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}
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} else if ($val > $offset) {
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if ($lines_offset[--$mid] < $offset) {
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$line = $mid+1;
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return;
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} else {
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$right = $mid;
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}
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} else {
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$line = $mid+1;
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return;
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}
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} while (true);
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}
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/** parses the sources and fetches its vars name, type and if they are initialized or not */
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function get_vars($txt)
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{
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$ret = array();
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preg_match_all('/((?:(?:unsigned|struct)\s+)?\w+)(?:\s*(\*+)\s+|\s+(\**))(\w+(?:\[\s*\w*\s*\])?)\s*(?:(=)[^,;]+)?((?:\s*,\s*\**\s*\w+(?:\[\s*\w*\s*\])?\s*(?:=[^,;]+)?)*)\s*;/S', $txt, $m, PREG_SET_ORDER);
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foreach ($m as $x) {
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// the first parameter is special
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if (!in_array($x[1], array('else', 'endif', 'return'))) // hack to skip reserved words
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$ret[$x[4]] = array($x[1] . $x[2] . $x[3], $x[5]);
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// are there more vars?
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if ($x[6]) {
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preg_match_all('/(\**)\s*(\w+(?:\[\s*\w*\s*\])?)\s*(=?)/S', $x[6], $y, PREG_SET_ORDER);
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foreach ($y as $z) {
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$ret[$z[2]] = array($x[1] . $z[1], $z[3]);
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}
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}
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}
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// if ($GLOBALS['current_function'] == 'for_debugging') { print_r($m);print_r($ret); }
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return $ret;
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}
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/** run diagnostic checks against one var. */
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function check_param($db, $idx, $exp, $optional, $allow_uninit = false)
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{
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global $error_few_vars_given;
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if ($idx >= count($db)) {
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if (!$error_few_vars_given) {
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error("too few variables passed to function");
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$error_few_vars_given = true;
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}
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return;
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} elseif ($db[$idx][0] === '**dummy**') {
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return;
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}
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if ($db[$idx][1] != $exp) {
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error("{$db[$idx][0]}: expected '$exp' but got '{$db[$idx][1]}' [".($idx+1).']');
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}
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if (!$optional && $db[$idx][2]) {
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error("not optional var is initialized: {$db[$idx][0]} [".($idx+1).']', 2);
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}
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if (!$allow_uninit && $optional && !$db[$idx][2]) {
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error("optional var not initialized: {$db[$idx][0]} [".($idx+1).']', 1);
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}
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}
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/** fetch params passed to zend_parse_params*() */
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function get_params($vars, $str)
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{
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$ret = array();
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preg_match_all('/(?:\([^)]+\))?(&?)([\w>.()-]+(?:\[\w+\])?)\s*,?((?:\)*\s*=)?)/S', $str, $m, PREG_SET_ORDER);
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foreach ($m as $x) {
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$name = $x[2];
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// little hack for last parameter
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if (strpos($name, '(') === false) {
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$name = rtrim($name, ')');
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}
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if (empty($vars[$name][0])) {
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error("variable not found: '$name'", 3);
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$ret[][] = '**dummy**';
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} else {
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$ret[] = array($name, $vars[$name][0] . ($x[1] ? '*' : ''), $vars[$name][1]);
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}
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// the end (yes, this is a little hack :P)
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if ($x[3]) {
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break;
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}
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}
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// if ($GLOBALS['current_function'] == 'for_debugging') { var_dump($m); var_dump($ret); }
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return $ret;
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}
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/** run tests on a function. the code is passed in $txt */
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function check_function($name, $txt, $offset)
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{
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global $API_params;
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$regex = '/
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(?: zend_parse_parameters(?:_throw)? \s*\([^,]+
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| zend_parse_(?:parameters_ex|method_parameters) \s*\([^,]+,[^,]+
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| zend_parse_method_parameters_ex \s*\([^,]+,[^,]+,[^,+]
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)
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,\s*"([^"]*)"\s*
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,\s*([^{;]*)
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/Sx';
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if (preg_match_all($regex, $txt, $matches, PREG_SET_ORDER | PREG_OFFSET_CAPTURE)) {
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$GLOBALS['current_function'] = $name;
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foreach ($matches as $m) {
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$GLOBALS['error_few_vars_given'] = false;
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update_lineno($offset + $m[2][1]);
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$vars = get_vars(substr($txt, 0, $m[0][1])); // limit var search to current location
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$params = get_params($vars, $m[2][0]);
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$optional = $varargs = false;
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$last_char = '';
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$j = -1;
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$spec = $m[1][0];
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$len = strlen($spec);
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for ($i = 0; $i < $len; ++$i) {
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$char = $spec[$i];
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switch ($char = $spec[$i]) {
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// separator for optional parameters
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case '|':
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if ($optional) {
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error("more than one optional separator at char #$i");
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} else {
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$optional = true;
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if ($i == $len-1) {
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error("unnecessary optional separator");
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}
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}
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break;
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// separate_zval_if_not_ref
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case '/':
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if (in_array($last_char, array('l', 'L', 'd', 'b'))) {
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error("the '/' specifier should not be applied to '$last_char'");
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}
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break;
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// nullable arguments
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case '!':
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if (in_array($last_char, array('l', 'L', 'd', 'b'))) {
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check_param($params, ++$j, 'zend_bool*', $optional);
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}
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break;
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// variadic arguments
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case '+':
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case '*':
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if ($varargs) {
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error("A varargs specifier can only be used once. repeated char at column $i");
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} else {
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check_param($params, ++$j, 'zval**', $optional);
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check_param($params, ++$j, 'int*', $optional);
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$varargs = true;
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}
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break;
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case 's':
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case 'p':
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check_param($params, ++$j, 'char**', $optional, $allow_uninit=true);
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check_param($params, ++$j, 'size_t*', $optional, $allow_uninit=true);
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if ($optional && !$params[$j-1][2] && !$params[$j][2]
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&& $params[$j-1][0] !== '**dummy**' && $params[$j][0] !== '**dummy**') {
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error("one of optional vars {$params[$j-1][0]} or {$params[$j][0]} must be initialized", 1);
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}
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break;
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case 'C':
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// C must always be initialized, independently of whether it's optional
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check_param($params, ++$j, 'zend_class_entry**', false);
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break;
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default:
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if (!isset($API_params[$char])) {
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error("unknown char ('$char') at column $i");
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}
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// If an is_null flag is in use, only that flag is required to be
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// initialized
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$allow_uninit = $i+1 < $len && $spec[$i+1] === '!'
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&& in_array($char, array('l', 'L', 'd', 'b'));
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foreach ($API_params[$char] as $exp) {
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check_param($params, ++$j, $exp, $optional, $allow_uninit);
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}
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}
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$last_char = $char;
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}
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}
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}
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}
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/** the main recursion function. splits files in functions and calls the other functions */
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function recurse($path)
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{
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foreach (scandir($path) as $file) {
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if ($file == '.' || $file == '..' || $file == 'CVS') continue;
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$file = "$path/$file";
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if (is_dir($file)) {
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recurse($file);
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continue;
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}
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// parse only .c and .cpp files
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if (substr_compare($file, '.c', -2) && substr_compare($file, '.cpp', -4)) continue;
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$txt = file_get_contents($file);
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// remove comments (but preserve the number of lines)
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$txt = preg_replace('@//.*@S', '', $txt);
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$txt = preg_replace_callback('@/\*.*\*/@SsU', function($matches) {
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return preg_replace("/[^\r\n]+/S", "", $matches[0]);
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}, $txt);
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$split = preg_split('/PHP_(?:NAMED_)?(?:FUNCTION|METHOD)\s*\((\w+(?:,\s*\w+)?)\)/S', $txt, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_OFFSET_CAPTURE);
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if (count($split) < 2) continue; // no functions defined on this file
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array_shift($split); // the first part isn't relevant
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// generate the line offsets array
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$j = 0;
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$lines = preg_split("/(\r\n?|\n)/S", $txt, -1, PREG_SPLIT_DELIM_CAPTURE);
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$lines_offset = array();
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for ($i = 0; $i < count($lines); ++$i) {
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$j += strlen($lines[$i]) + strlen(@$lines[++$i]);
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$lines_offset[] = $j;
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}
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$GLOBALS['lines_offset'] = $lines_offset;
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$GLOBALS['current_file'] = $file;
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for ($i = 0; $i < count($split); $i+=2) {
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// if the /* }}} */ comment is found use it to reduce false positives
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// TODO: check the other indexes
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list($f) = preg_split('@/\*\s*}}}\s*\*/@S', $split[$i+1][0]);
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check_function(preg_replace('/\s*,\s*/S', '::', $split[$i][0]), $f, $split[$i][1]);
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}
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}
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}
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$dirs = array();
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if (isset($argc) && $argc > 1) {
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if ($argv[1] == '-h' || $argv[1] == '-help' || $argv[1] == '--help') {
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echo <<<HELP
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Synopsis:
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php check_parameters.php [directories]
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HELP;
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exit(0);
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}
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for ($i = 1; $i < $argc; $i++) {
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$dirs[] = $argv[$i];
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}
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} else {
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$dirs[] = PHPDIR;
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}
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foreach($dirs as $dir) {
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if (is_dir($dir)) {
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if (!is_readable($dir)) {
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echo "ERROR: directory '", $dir ,"' is not readable\n";
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exit(1);
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}
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} else {
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echo "ERROR: bogus directory '", $dir ,"'\n";
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exit(1);
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}
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}
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foreach ($dirs as $dir) {
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recurse(realpath($dir));
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}
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