public static function getInstance()
{
if (self::$instance === null) {
self::$instance = new CFG();
}
return self::$instance;
}
<?php include_once "PHP-Parser-master/lib/bootstrap.php"; include_once "TaintAnalysis/TaintAnalysis.php"; include_once "CFG/CFG.php"; $filename = $argv[1]; // Obtain the CFGs of the main function, auxiliary functions and function signatures. $fileCFGInfo = CFG::construct_file_cfgs($filename); fileTaintAnalysis($fileCFGInfo);
static function construct_file_cfgs($fileName)
{
print "Constructing CFGs for file " . $fileName . "\n";
$file = fopen($fileName, "r");
$parser = new PhpParser\Parser(new PhpParser\Lexer());
$contents = fread($file, filesize($fileName));
$stmts = array();
try {
$stmts = $parser->parse($contents);
} catch (PhpParser\Error $e) {
echo 'Parse Error: ', $e->getMessage();
}
echo "There are " . count($stmts) . " statements.\n";
// Construct the CFGs for all the functions defined in
// the file.
echo "Constructing the CFG map of functions.\n";
$className = "";
// If there is only one statement and it's a class definition,
// extract the inner class functions.
if (count($stmts) == 1 && $stmts[0] instanceof PhpParser\Node\Stmt\Class_) {
print "Constructing CFG for class\n";
$className = $stmts[0]->name;
$function_definitions = CFG::process_function_definitions($stmts[0]->stmts, $fileName, $className);
} else {
$function_definitions = CFG::process_function_definitions($stmts, $fileName, $className);
}
$function_cfgs = $function_definitions[0];
$function_signatures = $function_definitions[1];
echo "Finished construction of the CFG map of functions.\n";
echo "Found " . count($function_signatures) . " inner functions.\n";
echo "The function names are:\n";
foreach ($function_signatures as $name => $signature) {
print $name . "\n";
}
// Construct the CFG of the main procedure of the file.
echo "Constructing the main CFG.\n";
$main_cfg = CFG::construct_cfg($stmts);
echo "Finished construction of the main CFG.\n";
echo "The main in-order traversal of the CFG is:\n";
$main_cfg->print_preorder_cfg();
/*
echo "The CFGs of the inner functions are:\n";
foreach($function_cfgs as $name => $inner_cfg) {
print "The CFG of ".$name." is :\n";
$inner_cfg->print_cfg();
}
*/
fclose($file);
return new FileCFGInfo($main_cfg, $function_cfgs, $function_signatures, $className, $fileName);
}
