acd8a092f8
syntaxErrors were not suppressable, because they were treated as InternalErrors which were thrown and catched during the checking, and normal suppression rules were not applied for those. We fix this by calling the normal reportErr() function that does suppression matching.
700 lines
24 KiB
C++
700 lines
24 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2015 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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#include "version.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[] = CPPCHECK_VERSION_STRING;
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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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while (!fileInfo.empty()) {
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delete fileInfo.back();
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fileInfo.pop_back();
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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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std::ifstream fin(path.c_str());
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return processFile(path, fin);
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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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std::istringstream iss(content);
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return processFile(path, iss);
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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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std::set<unsigned long long> checksums;
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// First make sure that error occurs with the original code
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bool internalErrorFound(false);
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checkFile(code, FileName, checksums, internalErrorFound);
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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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const 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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const 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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checksums.clear();
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checkFile(code, FileName, checksums, internalErrorFound);
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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, std::istream& fileStream)
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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.quiet == false) {
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std::string fixedpath = Path::simplifyPath(filename);
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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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bool internalErrorFound(false);
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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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{
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Timer t("Preprocessor::preprocess", _settings._showtime, &S_timerResults);
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preprocessor.preprocess(fileStream, 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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std::set<unsigned long long> checksums;
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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.quiet == false && it != configurations.begin()) {
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std::string fixedpath = Path::simplifyPath(filename);
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fixedpath = Path::toNativeSeparators(fixedpath);
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_errorLogger.reportOut("Checking " + fixedpath + ": " + cfg + "...");
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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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std::string codeWithoutCfg = preprocessor.getcode(filedata, cfg, filename);
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t.Stop();
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codeWithoutCfg += _settings.append();
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if (_settings.debugFalsePositive) {
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if (findError(codeWithoutCfg, filename.c_str())) {
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return exitcode;
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}
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} else {
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if (!checkFile(codeWithoutCfg, filename.c_str(), checksums, internalErrorFound)) {
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if (_settings.isEnabled("information") && (_settings.debug || _settings._verbose))
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purgedConfigurationMessage(filename, cfg);
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}
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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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exitcode=1; // e.g. reflect a syntax error
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}
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// In jointSuppressionReport mode, unmatched suppressions are
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// collected after all files are processed
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if (!_settings.jointSuppressionReport && (_settings.isEnabled("information") || _settings.checkConfiguration)) {
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reportUnmatchedSuppressions(_settings.nomsg.getUnmatchedLocalSuppressions(filename, unusedFunctionCheckIsEnabled()));
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}
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_errorList.clear();
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if (internalErrorFound && (exitcode==0)) {
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exitcode=1;
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}
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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 an 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::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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}
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//---------------------------------------------------------------------------
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// CppCheck - A function that checks a specified file
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//---------------------------------------------------------------------------
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bool CppCheck::checkFile(const std::string &code, const char FileName[], std::set<unsigned long long>& checksums, bool& internalErrorFound)
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{
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internalErrorFound=false;
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if (_settings.terminated() || _settings.checkConfiguration)
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return true;
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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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// 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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bool result = _tokenizer.tokenize(istr, FileName, cfg);
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timer.Stop();
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if (_settings._force || _settings._maxConfigs > 1) {
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const unsigned long long checksum = _tokenizer.list.calculateChecksum();
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if (checksums.find(checksum) != checksums.end())
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return false;
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checksums.insert(checksum);
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}
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if (!result) {
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// File had syntax errors, abort
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return true;
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}
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// dump
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if (_settings.dump) {
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std::string dumpfile = std::string(FileName) + ".dump";
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std::ofstream fdump(dumpfile.c_str());
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if (fdump.is_open()) {
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fdump << "<?xml version=\"1.0\"?>" << std::endl;
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fdump << "<dump cfg=\"" << cfg << "\">" << std::endl;
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_tokenizer.dump(fdump);
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fdump << "</dump>" << std::endl;
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}
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return true;
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}
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// call all "runChecks" in all registered Check classes
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for (std::list<Check *>::const_iterator it = Check::instances().begin(); it != Check::instances().end(); ++it) {
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if (_settings.terminated())
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return true;
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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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// Analyse the tokens..
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for (std::list<Check *>::const_iterator it = Check::instances().begin(); it != Check::instances().end(); ++it) {
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Check::FileInfo *fi = (*it)->getFileInfo(&_tokenizer, &_settings);
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if (fi != nullptr)
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fileInfo.push_back(fi);
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}
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executeRules("normal", _tokenizer);
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if (!_simplify)
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return true;
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Timer timer3("Tokenizer::simplifyTokenList2", _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 true;
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// call all "runSimplifiedChecks" in all registered Check classes
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for (std::list<Check *>::const_iterator it = Check::instances().begin(); it != Check::instances().end(); ++it) {
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if (_settings.terminated())
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return true;
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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 true;
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executeRules("simple", _tokenizer);
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if (_settings.terminated())
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return true;
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} catch (const InternalError &e) {
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internalErrorFound=true;
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std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
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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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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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loc.setfile(_tokenizer.list.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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e.id,
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false);
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reportErr(errmsg);
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}
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return true;
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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 = nullptr;
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int erroffset = 0;
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pcre *re = pcre_compile(rule.pattern.c_str(),0,&error,&erroffset,nullptr);
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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]= {0};
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while (pos < (int)str.size() && 0 <= pcre_exec(re, nullptr, str.c_str(), (int)str.size(), pos, 0, ovector, 30)) {
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const unsigned int pos1 = (unsigned int)ovector[0];
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const 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.list.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);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
Settings &CppCheck::settings()
|
|
{
|
|
return _settings;
|
|
}
|
|
|
|
void CppCheck::tooManyConfigsError(const std::string &file, const std::size_t numberOfConfigurations)
|
|
{
|
|
if (!_settings.isEnabled("information") && !tooManyConfigs)
|
|
return;
|
|
|
|
tooManyConfigs = false;
|
|
|
|
if (_settings.isEnabled("information") && file.empty())
|
|
return;
|
|
|
|
std::list<ErrorLogger::ErrorMessage::FileLocation> loclist;
|
|
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::purgedConfigurationMessage(const std::string &file, const std::string& configuration)
|
|
{
|
|
|
|
tooManyConfigs = false;
|
|
|
|
if (_settings.isEnabled("information") && file.empty())
|
|
return;
|
|
|
|
std::list<ErrorLogger::ErrorMessage::FileLocation> loclist;
|
|
if (!file.empty()) {
|
|
ErrorLogger::ErrorMessage::FileLocation location;
|
|
location.setfile(file);
|
|
loclist.push_back(location);
|
|
}
|
|
|
|
ErrorLogger::ErrorMessage errmsg(loclist,
|
|
Severity::information,
|
|
"The configuration '" + configuration + "' was not checked because its code equals another one.",
|
|
"purgedConfiguration",
|
|
false);
|
|
|
|
reportErr(errmsg);
|
|
}
|
|
|
|
//---------------------------------------------------------------------------
|
|
|
|
void CppCheck::reportErr(const ErrorLogger::ErrorMessage &msg)
|
|
{
|
|
if (!_settings.library.reportErrors(msg.file0))
|
|
return;
|
|
|
|
const 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()
|
|
{
|
|
Settings s(_settings);
|
|
s.addEnabled("warning");
|
|
s.addEnabled("style");
|
|
s.addEnabled("portability");
|
|
s.addEnabled("performance");
|
|
s.addEnabled("information");
|
|
|
|
tooManyConfigs = true;
|
|
tooManyConfigsError("",0U);
|
|
|
|
// call all "getErrorMessages" in all registered Check classes
|
|
for (std::list<Check *>::const_iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
|
|
(*it)->getErrorMessages(this, &s);
|
|
|
|
Tokenizer::getErrorMessages(this, &s);
|
|
Preprocessor::getErrorMessages(this, &s);
|
|
}
|
|
|
|
void CppCheck::analyseWholeProgram()
|
|
{
|
|
// Analyse the tokens
|
|
for (std::list<Check *>::const_iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
|
|
(*it)->analyseWholeProgram(fileInfo, _settings, *this);
|
|
}
|
|
|
|
bool CppCheck::unusedFunctionCheckIsEnabled() const
|
|
{
|
|
return (_settings._jobs == 1 && _settings.isEnabled("unusedFunction"));
|
|
}
|