cppcheck/lib/checknonreentrantfunctions.cpp

/*
 * Cppcheck - A tool for static C/C++ code analysis
 * Copyright (C) 2007-2015 Daniel Marjamäki and Cppcheck team.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

//---------------------------------------------------------------------------
// Find non reentrant functions
//---------------------------------------------------------------------------

#include "checknonreentrantfunctions.h"
#include "symboldatabase.h"

//---------------------------------------------------------------------------


// Register this check class (by creating a static instance of it)
namespace {
    CheckNonReentrantFunctions instance;
}

void CheckNonReentrantFunctions::nonReentrantFunctions()
{
    if (!_settings->standards.posix || !_settings->isEnabled("portability"))
        return;

    const SymbolDatabase * const symbolDatabase = _tokenizer->getSymbolDatabase();
    const std::size_t functions = symbolDatabase->functionScopes.size();
    for (std::size_t i = 0; i < functions; ++i) {
        const Scope * scope = symbolDatabase->functionScopes[i];
        for (const Token *tok = scope->classStart->next(); tok != scope->classEnd; tok = tok->next()) {
            // Look for function invocations
            if (tok->varId() != 0 || !tok->isName() || tok->strAt(1) != "(")
                continue;

            // Check for non-reentrant function name
            std::map<std::string, std::string>::const_iterator it = _nonReentrantFunctions.find(tok->str());
            if (it == _nonReentrantFunctions.end())
                continue;

            const Token *prev = tok->previous();
            if (prev) {
                // Ignore function definitions, class members or class definitions
                if (prev->str() == ".")
                    continue;

                // Check for "std" or global namespace, ignore other namespaces
                if (_tokenizer->isCPP() && prev->str() == "::" && prev->previous() && prev->previous()->str() != "std" && prev->previous()->isName())
                    continue;
            }

            // Only affecting multi threaded code, therefore this is "portability"
            reportError(tok, Severity::portability, "nonreentrantFunctions" + it->first, it->second);
        }
    }
}
//---------------------------------------------------------------------------