646 lines
22 KiB
C++
646 lines
22 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2013 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 <sstream>
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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[] = "1.63.1";
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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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: _errorLogger(errorLogger), exitcode(0), _useGlobalSuppressions(useGlobalSuppressions), tooManyConfigs(false), _simplify(true)
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{
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}
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CppCheck::~CppCheck()
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{
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S_timerResults.ShowResults(_settings._showtime);
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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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return processFile(path, "");
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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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return processFile(path, content);
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}
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void CppCheck::replaceAll(std::string& code, const std::string &from, const std::string &to)
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{
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std::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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}
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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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std::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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replaceAll(code, "\n#file", "\n// #file");
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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(const std::string& filename, const std::string& fileContent)
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{
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exitcode = 0;
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// only show debug warnings for accepted C/C++ source files
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if (!Path::acceptFile(filename))
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_settings.debugwarnings = false;
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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 = Path::simplifyPath(filename.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 (democlient)
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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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// Run rules on this code
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for (std::list<Settings::Rule>::const_iterator it = _settings.rules.begin(); it != _settings.rules.end(); ++it) {
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if (it->tokenlist == "define") {
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Tokenizer tokenizer2(&_settings, this);
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std::istringstream istr2(filedata);
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tokenizer2.list.createTokens(istr2, filename);
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for (const Token *tok = tokenizer2.list.front(); tok; tok = tok->next()) {
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if (tok->str() == "#define") {
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std::string code = std::string(tok->linenr()-1U, '\n');
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for (const Token *tok2 = tok; tok2 && tok2->linenr() == tok->linenr(); tok2 = tok2->next())
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code += " " + tok2->str();
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Tokenizer tokenizer3(&_settings, this);
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std::istringstream istr3(code);
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tokenizer3.list.createTokens(istr3, tokenizer2.list.file(tok));
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executeRules("define", tokenizer3);
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}
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}
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break;
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}
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}
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if (!_settings.userDefines.empty() && _settings._maxConfigs==1U) {
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configurations.clear();
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configurations.push_back(_settings.userDefines);
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}
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if (!_settings._force && configurations.size() > _settings._maxConfigs) {
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if (_settings.isEnabled("information")) {
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tooManyConfigsError(Path::toNativeSeparators(filename),configurations.size());
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} else {
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tooManyConfigs = true;
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}
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}
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unsigned 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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break;
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cfg = *it;
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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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if (!_settings.userDefines.empty()) {
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if (!cfg.empty())
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cfg = ";" + cfg;
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cfg = _settings.userDefines + cfg;
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}
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Timer t("Preprocessor::getcode", _settings._showtime, &S_timerResults);
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const std::string codeWithoutCfg = preprocessor.getcode(filedata, cfg, filename);
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t.Stop();
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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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}
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} catch (const std::runtime_error &e) {
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internalError(filename, e.what());
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} catch (const InternalError &e) {
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internalError(filename, e.errorMessage);
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}
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if (_settings.isEnabled("information") || _settings.checkConfiguration)
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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::internalError(const std::string &filename, const std::string &msg)
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{
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const std::string fixedpath = Path::toNativeSeparators(filename);
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const std::string fullmsg("Bailing out from checking " + fixedpath + " since there was a internal error: " + msg);
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if (_settings.isEnabled("information")) {
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const ErrorLogger::ErrorMessage::FileLocation loc1(filename, 0);
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std::list<ErrorLogger::ErrorMessage::FileLocation> callstack;
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callstack.push_back(loc1);
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ErrorLogger::ErrorMessage errmsg(callstack,
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Severity::information,
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fullmsg,
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"internalError",
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false);
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_errorLogger.reportErr(errmsg);
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} else {
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// Report on stdout
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_errorLogger.reportOut(fullmsg);
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}
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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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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.simplifyTokenList2();
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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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if (_settings._showtime != SHOWTIME_NONE)
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_tokenizer.setTimerResults(&S_timerResults);
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try {
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bool result;
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// Execute rules for "raw" code
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for (std::list<Settings::Rule>::const_iterator it = _settings.rules.begin(); it != _settings.rules.end(); ++it) {
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if (it->tokenlist == "raw") {
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Tokenizer tokenizer2(&_settings, this);
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std::istringstream istr(code);
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tokenizer2.list.createTokens(istr, FileName);
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executeRules("raw", tokenizer2);
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break;
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}
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}
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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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// 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, FileName, &_settings);
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executeRules("normal", _tokenizer);
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if (!_simplify)
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return;
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Timer timer3("Tokenizer::simplifyTokenList", _settings._showtime, &S_timerResults);
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result = _tokenizer.simplifyTokenList2();
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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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if (_settings.terminated())
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return;
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executeRules("simple", _tokenizer);
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if (_settings.terminated())
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return;
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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.list.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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void CppCheck::executeRules(const std::string &tokenlist, const Tokenizer &tokenizer)
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{
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(void)tokenlist;
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(void)tokenizer;
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#ifdef HAVE_RULES
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// Are there rules to execute?
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bool isrule = false;
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for (std::list<Settings::Rule>::const_iterator it = _settings.rules.begin(); it != _settings.rules.end(); ++it) {
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if (it->tokenlist == tokenlist)
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isrule = true;
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}
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// There is no rule to execute
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if (isrule == false)
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return;
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// Write all tokens in a string that can be parsed by pcre
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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() || rule.tokenlist != tokenlist)
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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) {
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if (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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continue;
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}
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int pos = 0;
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int ovector[30];
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while (pos < (int)str.size() && 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.getSourceFilePath());
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loc.line = 0;
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std::size_t len = 0;
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for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next()) {
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len = len + 1U + tok->str().size();
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if (len > pos1) {
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loc.setfile(tokenizer.list.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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#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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void CppCheck::tooManyConfigsError(const std::string &file, const std::size_t numberOfConfigurations)
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{
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if (!_settings.isEnabled("information") && !tooManyConfigs)
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return;
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tooManyConfigs = false;
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if (_settings.isEnabled("information") && file.empty())
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return;
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std::list<ErrorLogger::ErrorMessage::FileLocation> loclist;
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if (!file.empty()) {
|
|
ErrorLogger::ErrorMessage::FileLocation location;
|
|
location.setfile(file);
|
|
loclist.push_back(location);
|
|
}
|
|
|
|
std::ostringstream msg;
|
|
msg << "Too many #ifdef configurations - cppcheck only checks " << _settings._maxConfigs;
|
|
if (numberOfConfigurations > _settings._maxConfigs)
|
|
msg << " of " << numberOfConfigurations << " configurations. Use --force to check all configurations.\n";
|
|
if (file.empty())
|
|
msg << " configurations. Use --force to check all configurations. For more details, use --enable=information.\n";
|
|
msg << "The checking of the file will be interrupted because there are too many "
|
|
"#ifdef configurations. Checking of all #ifdef configurations can be forced "
|
|
"by --force command line option or from GUI preferences. However that may "
|
|
"increase the checking time.";
|
|
if (file.empty())
|
|
msg << " For more details, use --enable=information.";
|
|
|
|
|
|
ErrorLogger::ErrorMessage errmsg(loclist,
|
|
Severity::information,
|
|
msg.str(),
|
|
"toomanyconfigs",
|
|
false);
|
|
|
|
reportErr(errmsg);
|
|
}
|
|
|
|
//---------------------------------------------------------------------------
|
|
|
|
void CppCheck::reportErr(const ErrorLogger::ErrorMessage &msg)
|
|
{
|
|
if (!_settings.library.reportErrors(msg.file0))
|
|
return;
|
|
|
|
std::string errmsg = msg.toString(_settings._verbose);
|
|
if (errmsg.empty())
|
|
return;
|
|
|
|
// Alert only about unique errors
|
|
if (std::find(_errorList.begin(), _errorList.end(), errmsg) != _errorList.end())
|
|
return;
|
|
|
|
if (_settings.debugFalsePositive) {
|
|
// Don't print out error
|
|
_errorList.push_back(errmsg);
|
|
return;
|
|
}
|
|
|
|
std::string file;
|
|
unsigned int line(0);
|
|
if (!msg._callStack.empty()) {
|
|
file = msg._callStack.back().getfile(false);
|
|
line = msg._callStack.back().line;
|
|
}
|
|
|
|
if (_useGlobalSuppressions) {
|
|
if (_settings.nomsg.isSuppressed(msg._id, file, line))
|
|
return;
|
|
} else {
|
|
if (_settings.nomsg.isSuppressedLocal(msg._id, file, line))
|
|
return;
|
|
}
|
|
|
|
if (!_settings.nofail.isSuppressed(msg._id, file, line))
|
|
exitcode = 1;
|
|
|
|
_errorList.push_back(errmsg);
|
|
|
|
_errorLogger.reportErr(msg);
|
|
}
|
|
|
|
void CppCheck::reportOut(const std::string &outmsg)
|
|
{
|
|
_errorLogger.reportOut(outmsg);
|
|
}
|
|
|
|
void CppCheck::reportProgress(const std::string &filename, const char stage[], const std::size_t value)
|
|
{
|
|
_errorLogger.reportProgress(filename, stage, value);
|
|
}
|
|
|
|
void CppCheck::reportInfo(const ErrorLogger::ErrorMessage &msg)
|
|
{
|
|
// Suppressing info message?
|
|
std::string file;
|
|
unsigned int line(0);
|
|
if (!msg._callStack.empty()) {
|
|
file = msg._callStack.back().getfile(false);
|
|
line = msg._callStack.back().line;
|
|
}
|
|
if (_useGlobalSuppressions) {
|
|
if (_settings.nomsg.isSuppressed(msg._id, file, line))
|
|
return;
|
|
} else {
|
|
if (_settings.nomsg.isSuppressedLocal(msg._id, file, line))
|
|
return;
|
|
}
|
|
|
|
_errorLogger.reportInfo(msg);
|
|
}
|
|
|
|
void CppCheck::reportStatus(unsigned int /*fileindex*/, unsigned int /*filecount*/, std::size_t /*sizedone*/, std::size_t /*sizetotal*/)
|
|
{
|
|
|
|
}
|
|
|
|
void CppCheck::getErrorMessages()
|
|
{
|
|
tooManyConfigs = true;
|
|
tooManyConfigsError("",0U);
|
|
|
|
// call all "getErrorMessages" in all registered Check classes
|
|
for (std::list<Check *>::iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
|
|
(*it)->getErrorMessages(this, &_settings);
|
|
|
|
Tokenizer::getErrorMessages(this, &_settings);
|
|
Preprocessor::getErrorMessages(this, &_settings);
|
|
}
|