541 lines
18 KiB
C++
541 lines
18 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2012 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 <fstream>
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#include <stdexcept>
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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 const char Version[] = "1.53";
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static const char ExtraVersion[] = "";
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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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const char * CppCheck::version()
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{
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return Version;
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}
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const char * CppCheck::extraVersion()
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{
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return ExtraVersion;
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}
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unsigned int CppCheck::check(const std::string &path)
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{
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_filename = path;
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return processFile();
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}
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unsigned int CppCheck::check(const std::string &path, const std::string &content)
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{
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_filename = path;
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_fileContent = content;
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const unsigned int retval = processFile();
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_fileContent.clear();
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return retval;
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}
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std::string CppCheck::replaceAll(std::string code, const std::string &from, const std::string &to) const
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{
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size_t pos = 0;
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while ((pos = code.find(from, pos)) != std::string::npos) {
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code.replace(pos, from.length(), to);
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pos += to.length();
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}
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return code;
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}
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bool CppCheck::findError(std::string code, const char FileName[])
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{
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// First make sure that error occurs with the original code
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checkFile(code, FileName);
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if (_errorList.empty()) {
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// Error does not occur with this code
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return false;
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}
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std::string previousCode = code;
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std::string error = _errorList.front();
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for (;;) {
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// Try to remove included files from the source
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size_t found=previousCode.rfind("\n#endfile");
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if (found == std::string::npos) {
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// No modifications can be done to the code
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} else {
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// Modify code and re-check it to see if error
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// is still there.
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code = previousCode.substr(found+9);
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_errorList.clear();
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checkFile(code, FileName);
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}
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if (_errorList.empty()) {
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// Latest code didn't fail anymore. Fall back
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// to previous code
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code = previousCode;
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} else {
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error = _errorList.front();
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}
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// Add '\n' so that "\n#file" on first line would be found
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code = "// " + error + "\n" + code;
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code = replaceAll(code, "\n#file", "\n// #file");
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code = replaceAll(code, "\n#endfile", "\n// #endfile");
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// We have reduced the code as much as we can. Print out
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// the code and quit.
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_errorLogger.reportOut(code);
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break;
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}
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return true;
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}
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unsigned int CppCheck::processFile()
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{
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exitcode = 0;
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// only show debug warnings for C/C++ source files (don't fix
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// debug warnings for java/c#/etc files)
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if (!Path::acceptFile(_filename))
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_settings.debugwarnings = false;
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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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const std::string printname = Path::toNativeSeparators(_filename);
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reportOut("Analysing " + printname + "...");
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std::ifstream f(_filename.c_str());
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analyseFile(f, _filename);
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}
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_errout.str("");
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if (_settings.terminated())
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return exitcode;
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if (_settings._errorsOnly == false) {
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std::string fixedpath(_filename);
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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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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 (!_fileContent.empty()) {
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// File content was given as a string
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std::istringstream iss(_fileContent);
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preprocessor.preprocess(iss, filedata, configurations, _filename, _settings._includePaths);
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} else {
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// Only file name was given, read the content from file
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std::ifstream fin(_filename.c_str());
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Timer t("Preprocessor::preprocess", _settings._showtime, &S_timerResults);
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preprocessor.preprocess(fin, filedata, configurations, _filename, _settings._includePaths);
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}
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if (_settings.checkConfiguration) {
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return 0;
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}
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if (!_settings.userDefines.empty()) {
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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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// Check only a few configurations (default 12), after that bail out, unless --force
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// was used.
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if (!_settings._force && checkCount >= _settings._maxConfigs) {
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const std::string fixedpath = Path::toNativeSeparators(_filename);
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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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false);
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if (!_settings.nomsg.isSuppressedLocal(errmsg._id, fixedpath, location.line)) {
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reportErr(errmsg);
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}
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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, _filename);
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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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std::string fixedpath = Path::simplifyPath(_filename.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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const std::string &appendCode = _settings.append();
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if (_settings.debugFalsePositive) {
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if (findError(codeWithoutCfg + appendCode, _filename.c_str())) {
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return exitcode;
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}
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} else {
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checkFile(codeWithoutCfg + appendCode, _filename.c_str());
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}
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++checkCount;
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}
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} catch (std::runtime_error &e) {
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// Exception was thrown when checking this file..
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const std::string fixedpath = Path::toNativeSeparators(_filename);
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_errorLogger.reportOut("Bailing out from checking " + fixedpath + ": " + e.what());
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}
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if (!_settings._errorsOnly)
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reportUnmatchedSuppressions(_settings.nomsg.getUnmatchedLocalSuppressions(_filename));
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_errorList.clear();
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return exitcode;
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}
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void CppCheck::checkFunctionUsage()
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{
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// This generates false positives - especially for libraries
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if (_settings.isEnabled("unusedFunction") && _settings._jobs == 1) {
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const bool verbose_orig = _settings._verbose;
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_settings._verbose = false;
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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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_settings._verbose = verbose_orig;
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}
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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);
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if (_settings.checkConfiguration) {
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return;
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}
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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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(*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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(*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() || _settings.checkConfiguration)
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return;
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Tokenizer _tokenizer(&_settings, this);
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try {
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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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// File had syntax errors, abort
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return;
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}
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// Update the _dependencies..
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if (_tokenizer.getFiles()->size() >= 2)
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_dependencies.insert(_tokenizer.getFiles()->begin()+1, _tokenizer.getFiles()->end());
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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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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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if (_settings.isEnabled("unusedFunction") && _settings._jobs == 1)
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_checkUnusedFunctions.parseTokens(_tokenizer);
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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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// 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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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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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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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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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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false);
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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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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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len = len + 1 + tok->str().size();
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if (len > pos1) {
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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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const ErrorLogger::ErrorMessage errmsg(callStack, Severity::fromString(rule.severity), summary, rule.id, false);
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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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} catch (const InternalError &e) {
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std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
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ErrorLogger::ErrorMessage::FileLocation loc2;
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loc2.setfile(Path::toNativeSeparators(FileName));
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locationList.push_back(loc2);
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ErrorLogger::ErrorMessage::FileLocation loc;
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if (e.token) {
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loc.line = e.token->linenr();
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const std::string fixedpath = Path::toNativeSeparators(_tokenizer.file(e.token));
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loc.setfile(fixedpath);
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} else {
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loc.setfile(_tokenizer.getSourceFilePath());
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}
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locationList.push_back(loc);
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const ErrorLogger::ErrorMessage errmsg(locationList,
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Severity::error,
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e.errorMessage,
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"cppcheckError",
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false);
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_errorLogger.reportErr(errmsg);
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}
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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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const std::string errmsg = msg.toString(_settings._verbose);
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if (errmsg.empty())
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return;
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if (_settings.debugFalsePositive) {
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// Don't print out error
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_errorList.push_back(errmsg);
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return;
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}
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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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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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if (_settings.nomsg.isSuppressed(msg._id, file, line))
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return;
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} else {
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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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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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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 /*fileindex*/, unsigned int /*filecount*/, size_t /*sizedone*/, size_t /*sizetotal*/)
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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);
|
|
tokenizer.getErrorMessages(this, &_settings);
|
|
|
|
Preprocessor::getErrorMessages(this, &_settings);
|
|
}
|