470 lines
16 KiB
C++
470 lines
16 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2011 Daniel Marjamäki and Cppcheck team.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "cppcheck.h"
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#include "preprocessor.h" // preprocessor.
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#include "tokenize.h" // <- Tokenizer
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#include "check.h"
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#include "path.h"
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#include <algorithm>
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#include <iostream>
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#include <fstream>
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#include <stdexcept>
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#include <ctime>
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#include "timer.h"
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#ifdef HAVE_RULES
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#define PCRE_STATIC
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#include <pcre.h>
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#endif
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static TimerResults S_timerResults;
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CppCheck::CppCheck(ErrorLogger &errorLogger, bool useGlobalSuppressions)
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: _useGlobalSuppressions(useGlobalSuppressions), _errorLogger(errorLogger)
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{
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exitcode = 0;
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}
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CppCheck::~CppCheck()
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{
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if (_settings._showtime != SHOWTIME_NONE)
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S_timerResults.ShowResults();
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}
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void CppCheck::settings(const Settings ¤tSettings)
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{
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_settings = currentSettings;
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}
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void CppCheck::addFile(const std::string &filepath)
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{
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_filenames.push_back(Path::fromNativeSeparators(filepath));
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}
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void CppCheck::addFile(const std::string &path, const std::string &content)
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{
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_filenames.push_back(Path::fromNativeSeparators(path));
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_fileContents[ path ] = content;
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}
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void CppCheck::clearFiles()
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{
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_filenames.clear();
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_fileContents.clear();
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}
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const char * CppCheck::version()
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{
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return "1.47";
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}
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unsigned int CppCheck::check()
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{
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exitcode = 0;
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std::sort(_filenames.begin(), _filenames.end());
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// TODO: Should this be moved out to its own function so all the files can be
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// analysed before any files are checked?
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if (_settings.test_2_pass && _settings._jobs == 1)
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{
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for (unsigned int c = 0; c < _filenames.size(); c++)
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{
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const std::string fname = _filenames[c];
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if (_settings.terminated())
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break;
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std::string fixedname = Path::toNativeSeparators(fname);
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reportOut("Analysing " + fixedname + "..");
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std::ifstream f(fname.c_str());
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analyseFile(f, fname);
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}
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}
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for (unsigned int c = 0; c < _filenames.size(); c++)
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{
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_errout.str("");
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const std::string fname = _filenames[c];
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if (_settings.terminated())
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break;
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if (_settings._errorsOnly == false)
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{
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std::string fixedpath(fname);
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fixedpath = Path::simplifyPath(fixedpath.c_str());
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fixedpath = Path::toNativeSeparators(fixedpath);
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_errorLogger.reportOut(std::string("Checking ") + fixedpath + std::string("..."));
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}
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try
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{
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Preprocessor preprocessor(&_settings, this);
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std::list<std::string> configurations;
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std::string filedata = "";
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if ((!_fileContents.empty()) && (_fileContents.find(_filenames[c]) != _fileContents.end()))
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{
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// File content was given as a string
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std::istringstream iss(_fileContents[ _filenames[c] ]);
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preprocessor.preprocess(iss, filedata, configurations, fname, _settings._includePaths);
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}
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else
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{
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// Only file name was given, read the content from file
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std::ifstream fin(fname.c_str());
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Timer t("Preprocessor::preprocess", _settings._showtime, &S_timerResults);
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preprocessor.preprocess(fin, filedata, configurations, fname, _settings._includePaths);
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}
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_settings.ifcfg = bool(configurations.size() > 1);
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if (!_settings.userDefines.empty())
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{
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configurations.clear();
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configurations.push_back(_settings.userDefines);
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}
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int checkCount = 0;
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for (std::list<std::string>::const_iterator it = configurations.begin(); it != configurations.end(); ++it)
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{
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// Check only 12 first configurations, after that bail out, unless --force
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// was used.
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if (!_settings._force && checkCount > 11)
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{
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const std::string fixedpath = Path::toNativeSeparators(fname);
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ErrorLogger::ErrorMessage::FileLocation location;
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location.setfile(fixedpath);
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std::list<ErrorLogger::ErrorMessage::FileLocation> loclist;
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loclist.push_back(location);
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const std::string msg("Interrupted checking because of too many #ifdef configurations.\n"
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"The checking of the file was interrupted because there were too many "
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"#ifdef configurations. Checking of all #ifdef configurations can be forced "
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"by --force command line option or from GUI preferences. However that may "
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"increase the checking time.");
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ErrorLogger::ErrorMessage errmsg(loclist,
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Severity::information,
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msg,
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"toomanyconfigs");
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_errorLogger.reportErr(errmsg);
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break;
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}
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cfg = *it;
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Timer t("Preprocessor::getcode", _settings._showtime, &S_timerResults);
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const std::string codeWithoutCfg = Preprocessor::getcode(filedata, *it, fname, &_settings, &_errorLogger);
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t.Stop();
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// If only errors are printed, print filename after the check
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if (_settings._errorsOnly == false && it != configurations.begin())
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{
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std::string fixedpath = Path::simplifyPath(fname.c_str());
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fixedpath = Path::toNativeSeparators(fixedpath);
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_errorLogger.reportOut(std::string("Checking ") + fixedpath + ": " + cfg + std::string("..."));
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}
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std::string appendCode = _settings.append();
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if (!appendCode.empty())
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Preprocessor::preprocessWhitespaces(appendCode);
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checkFile(codeWithoutCfg + appendCode, _filenames[c].c_str());
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++checkCount;
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}
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}
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catch (std::runtime_error &e)
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{
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// Exception was thrown when checking this file..
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const std::string fixedpath = Path::toNativeSeparators(fname);
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_errorLogger.reportOut("Bailing out from checking " + fixedpath + ": " + e.what());
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}
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reportUnmatchedSuppressions(_settings.nomsg.getUnmatchedLocalSuppressions(fname));
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_errorLogger.reportStatus(c + 1, (unsigned int)_filenames.size());
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}
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// This generates false positives - especially for libraries
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const bool verbose_orig = _settings._verbose;
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_settings._verbose = false;
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if (_settings.isEnabled("unusedFunctions") && _settings._jobs == 1)
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{
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_errout.str("");
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if (_settings._errorsOnly == false)
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_errorLogger.reportOut("Checking usage of global functions..");
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_checkUnusedFunctions.check(this);
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}
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_settings._verbose = verbose_orig;
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_errorList.clear();
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return exitcode;
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}
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void CppCheck::analyseFile(std::istream &fin, const std::string &filename)
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{
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// Preprocess file..
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Preprocessor preprocessor(&_settings, this);
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std::list<std::string> configurations;
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std::string filedata = "";
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preprocessor.preprocess(fin, filedata, configurations, filename, _settings._includePaths);
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const std::string code = Preprocessor::getcode(filedata, "", filename, &_settings, &_errorLogger);
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// Tokenize..
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Tokenizer tokenizer(&_settings, this);
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std::istringstream istr(code);
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tokenizer.tokenize(istr, filename.c_str(), "");
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tokenizer.simplifyTokenList();
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// Analyse the tokens..
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std::set<std::string> data;
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for (std::list<Check *>::const_iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
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{
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(*it)->analyse(tokenizer.tokens(), data);
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}
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// Save analysis results..
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// TODO: This loop should be protected by a mutex or something like that
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// The saveAnalysisData must _not_ be called from many threads at the same time.
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for (std::list<Check *>::const_iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
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{
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(*it)->saveAnalysisData(data);
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}
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}
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//---------------------------------------------------------------------------
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// CppCheck - A function that checks a specified file
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//---------------------------------------------------------------------------
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void CppCheck::checkFile(const std::string &code, const char FileName[])
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{
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if (_settings.terminated())
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return;
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Tokenizer _tokenizer(&_settings, this);
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bool result;
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// Tokenize the file
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std::istringstream istr(code);
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Timer timer("Tokenizer::tokenize", _settings._showtime, &S_timerResults);
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result = _tokenizer.tokenize(istr, FileName, cfg);
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timer.Stop();
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if (!result)
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{
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// File had syntax errors, abort
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return;
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}
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Timer timer2("Tokenizer::fillFunctionList", _settings._showtime, &S_timerResults);
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_tokenizer.fillFunctionList();
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timer2.Stop();
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// call all "runChecks" in all registered Check classes
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for (std::list<Check *>::iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
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{
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if (_settings.terminated())
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return;
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Timer timerRunChecks((*it)->name() + "::runChecks", _settings._showtime, &S_timerResults);
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(*it)->runChecks(&_tokenizer, &_settings, this);
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}
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Timer timer3("Tokenizer::simplifyTokenList", _settings._showtime, &S_timerResults);
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result = _tokenizer.simplifyTokenList();
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timer3.Stop();
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if (!result)
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return;
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Timer timer4("Tokenizer::fillFunctionList", _settings._showtime, &S_timerResults);
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_tokenizer.fillFunctionList();
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timer4.Stop();
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if (_settings.isEnabled("unusedFunctions") && _settings._jobs == 1)
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_checkUnusedFunctions.parseTokens(_tokenizer);
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// call all "runSimplifiedChecks" in all registered Check classes
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for (std::list<Check *>::iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
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{
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if (_settings.terminated())
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return;
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Timer timerSimpleChecks((*it)->name() + "::runSimplifiedChecks", _settings._showtime, &S_timerResults);
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(*it)->runSimplifiedChecks(&_tokenizer, &_settings, this);
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}
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#ifdef HAVE_RULES
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// Are there extra rules?
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if (!_settings.rules.empty())
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{
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std::ostringstream ostr;
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for (const Token *tok = _tokenizer.tokens(); tok; tok = tok->next())
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ostr << " " << tok->str();
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const std::string str(ostr.str());
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for (std::list<Settings::Rule>::const_iterator it = _settings.rules.begin(); it != _settings.rules.end(); ++it)
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{
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const Settings::Rule &rule = *it;
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if (rule.pattern.empty() || rule.id.empty() || rule.severity.empty())
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continue;
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const char *error = 0;
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int erroffset = 0;
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pcre *re = pcre_compile(rule.pattern.c_str(),0,&error,&erroffset,NULL);
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if (!re && error)
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{
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ErrorLogger::ErrorMessage errmsg(std::list<ErrorLogger::ErrorMessage::FileLocation>(),
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Severity::error,
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error,
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"pcre_compile");
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reportErr(errmsg);
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}
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if (!re)
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continue;
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int pos = 0;
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int ovector[30];
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while (0 <= pcre_exec(re, NULL, str.c_str(), (int)str.size(), pos, 0, ovector, 30))
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{
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unsigned int pos1 = (unsigned int)ovector[0];
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unsigned int pos2 = (unsigned int)ovector[1];
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// jump to the end of the match for the next pcre_exec
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pos = (int)pos2;
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// determine location..
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ErrorLogger::ErrorMessage::FileLocation loc;
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loc.setfile(_tokenizer.getFiles()->front());
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loc.line = 0;
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unsigned int len = 0;
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for (const Token *tok = _tokenizer.tokens(); tok; tok = tok->next())
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{
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len = len + 1 + tok->str().size();
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if (len > pos1)
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{
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loc.setfile(_tokenizer.getFiles()->at(tok->fileIndex()));
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loc.line = tok->linenr();
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break;
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}
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}
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const std::list<ErrorLogger::ErrorMessage::FileLocation> callStack(1, loc);
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// Create error message
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std::string summary;
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if (rule.summary.empty())
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summary = "found '" + str.substr(pos1, pos2 - pos1) + "'";
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else
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summary = rule.summary;
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ErrorLogger::ErrorMessage errmsg(callStack, Severity::fromString(rule.severity), summary, rule.id);
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// Report error
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reportErr(errmsg);
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}
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pcre_free(re);
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}
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}
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#endif
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}
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Settings &CppCheck::settings()
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{
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return _settings;
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}
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//---------------------------------------------------------------------------
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void CppCheck::reportErr(const ErrorLogger::ErrorMessage &msg)
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{
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std::string errmsg = msg.toString(_settings._verbose);
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// Alert only about unique errors
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if (std::find(_errorList.begin(), _errorList.end(), errmsg) != _errorList.end())
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return;
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std::string file;
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unsigned int line(0);
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if (!msg._callStack.empty())
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{
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file = msg._callStack.back().getfile(false);
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line = msg._callStack.back().line;
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}
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if (_useGlobalSuppressions)
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{
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if (_settings.nomsg.isSuppressed(msg._id, file, line))
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return;
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}
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else
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{
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if (_settings.nomsg.isSuppressedLocal(msg._id, file, line))
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return;
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}
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if (!_settings.nofail.isSuppressed(msg._id, file, line))
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exitcode = 1;
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_errorList.push_back(errmsg);
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std::string errmsg2(errmsg);
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if (_settings._verbose)
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{
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errmsg2 += "\n Defines=\'" + cfg + "\'\n";
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}
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_errorLogger.reportErr(msg);
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_errout << errmsg2 << std::endl;
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}
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void CppCheck::reportOut(const std::string &outmsg)
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{
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_errorLogger.reportOut(outmsg);
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}
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const std::vector<std::string> &CppCheck::filenames() const
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{
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return _filenames;
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}
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void CppCheck::reportProgress(const std::string &filename, const char stage[], const unsigned int value)
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{
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_errorLogger.reportProgress(filename, stage, value);
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}
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void CppCheck::reportStatus(unsigned int /*index*/, unsigned int /*max*/)
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{
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}
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void CppCheck::getErrorMessages()
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{
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// call all "getErrorMessages" in all registered Check classes
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for (std::list<Check *>::iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
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(*it)->getErrorMessages(this, &_settings);
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Tokenizer tokenizer(&_settings, 0);
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tokenizer.getErrorMessages(this, &_settings);
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Preprocessor::getErrorMessages(this, &_settings);
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}
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