cppcheck/lib/checknonreentrantfunctions.cpp

106 lines
4.6 KiB
C++

/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2015 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;
}
namespace {
const std::set<std::string> _nonReentrantFunctions = make_container< std::set<std::string> > ()
<< "localtime" << "gmtime" << "strtok" << "gethostbyname" << "gethostbyaddr" << "getservbyname"
<< "getservbyport" << "crypt" << "ttyname" << "gethostbyname2"
<< "getprotobyname" << "getnetbyname" << "getnetbyaddr" << "getrpcbyname" << "getrpcbynumber" << "getrpcent"
<< "ctermid" << "readdir" << "getlogin" << "getpwent" << "getpwnam" << "getpwuid" << "getspent"
<< "fgetspent" << "getspnam" << "getgrnam" << "getgrgid" << "getnetgrent" << "tempnam" << "fgetpwent"
<< "fgetgrent" << "ecvt" << "gcvt" << "getservent" << "gethostent" << "getgrent" << "fcvt" ;
}
std::string CheckNonReentrantFunctions::generateErrorMessage(const std::string& function)
{
return std::string("Non reentrant function '") + function + "' called. " +
"For threadsafe applications it is recommended to use the reentrant replacement function '" + function + "_r'.";
}
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::set<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, generateErrorMessage(*it));
}
}
}
//---------------------------------------------------------------------------
void CheckNonReentrantFunctions::getErrorMessages(ErrorLogger *errorLogger, const Settings *settings) const
{
CheckNonReentrantFunctions c(0, settings, errorLogger);
std::set<std::string>::const_iterator it(_nonReentrantFunctions.begin()), itend(_nonReentrantFunctions.end());
for (; it!=itend; ++it) {
c.reportError(0, Severity::portability, "nonreentrantFunctions"+*it, generateErrorMessage(*it));
}
}
std::string CheckNonReentrantFunctions::classInfo() const
{
std::string info = "Warn if any of these non reentrant functions are used:\n";
std::set<std::string>::const_iterator it(_nonReentrantFunctions.begin()), itend(_nonReentrantFunctions.end());
for (; it!=itend; ++it) {
info += "- " + *it + "\n";
}
return info;
}