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cppcheck/lib/cppcheck.cpp

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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2009 Daniel Marjamäki and Cppcheck team.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "cppcheck.h"
#include "preprocessor.h" // preprocessor.
#include "tokenize.h" // <- Tokenizer
#include "filelister.h"
#include "check.h"
#include <algorithm>
#include <iostream>
#include <sstream>
#include <cstring>
#include <fstream>
#include <stdexcept>
#ifdef __GNUC__
#include <ctime> // clock_t
#define TIMER_START() clock_t c1 = clock();
#define TIMER_END(str) if(_settings._showtime){clock_t c2 = clock(); std::cout << str << ": " << ((c2 - c1) / 1000) << std::endl;}
#else
#include <ctime>
#define TIMER_START() std::time_t t1; std::time(&t1);
#define TIMER_END(str) if(_settings._showtime){std::time_t t2; std::time(&t2); std::cout << str << ": " << (t2 - t1) << std::endl;}
#endif
//---------------------------------------------------------------------------
CppCheck::CppCheck(ErrorLogger &errorLogger)
: _errorLogger(errorLogger)
{
}
CppCheck::~CppCheck()
{
}
void CppCheck::settings(const Settings &settings)
{
_settings = settings;
}
void CppCheck::addFile(const std::string &path)
{
FileLister::recursiveAddFiles(_filenames, path.c_str(), true);
}
void CppCheck::addFile(const std::string &path, const std::string &content)
{
_filenames.push_back(path);
_fileContents[ path ] = content;
}
void CppCheck::clearFiles()
{
_filenames.clear();
_fileContents.clear();
}
const char * CppCheck::version()
{
return "1.38";
}
void CppCheck::parseFromArgs(int argc, const char* const argv[])
{
std::vector<std::string> pathnames;
bool showHelp = false;
for (int i = 1; i < argc; i++)
{
if (strcmp(argv[i], "--version") == 0)
{
reportOut(std::string("Cppcheck ") + version());
return;
}
// Flag used for various purposes during debugging
else if (strcmp(argv[i], "--debug") == 0)
_settings._debug = true;
// Show all messages
else if (strcmp(argv[i], "-a") == 0 || strcmp(argv[i], "--all") == 0)
_settings.addEnabled("possibleError");
// Only print something when there are errors
else if (strcmp(argv[i], "-q") == 0 || strcmp(argv[i], "--quiet") == 0)
_settings._errorsOnly = true;
// Checking coding style
else if (strcmp(argv[i], "-s") == 0 || strcmp(argv[i], "--style") == 0)
_settings.addEnabled("style");
// Filter errors
else if (strcmp(argv[i], "--suppressions") == 0)
{
++i;
if (i >= argc)
throw std::runtime_error("cppcheck: No file specified for the --suppressions option");
std::ifstream f(argv[i]);
if (!f.is_open())
throw std::runtime_error("cppcheck: Couldn't open the file \"" + std::string(argv[i]) + "\"");
_settings.suppressions(f);
}
// Verbose error messages (configuration info)
else if (strcmp(argv[i], "-v") == 0 || strcmp(argv[i], "--verbose") == 0)
_settings._verbose = true;
// Force checking of files that have "too many" configurations
else if (strcmp(argv[i], "-f") == 0 || strcmp(argv[i], "--force") == 0)
_settings._force = true;
// Write results in results.xml
else if (strcmp(argv[i], "--xml") == 0)
_settings._xml = true;
// Check if there are unused functions
else if (strcmp(argv[i], "--unused-functions") == 0)
_settings.addEnabled("unusedFunctions");
// Append userdefined code to checked source code
else if (strncmp(argv[i], "--append=", 9) == 0)
_settings.append(9 + argv[i]);
// show timing information..
else if (strcmp(argv[i], "--showtime") == 0)
_settings._showtime = true;
// Print help
else if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0)
{
pathnames.clear();
_filenames.clear();
showHelp = true;
break;
}
else if (strncmp(argv[i], "--enable=", 9) == 0)
{
_settings.addEnabled(argv[i] + 9);
}
// --error-exitcode=1
else if (strncmp(argv[i], "--error-exitcode=", 17) == 0)
{
std::string temp = argv[i];
temp = temp.substr(17);
std::istringstream iss(temp);
if (!(iss >> _settings._exitCode))
{
_settings._exitCode = 0;
throw std::runtime_error("cppcheck: Argument must be an integer. Try something like '--error-exitcode=1'");
}
}
// Include paths
else if (strcmp(argv[i], "-I") == 0 || strncmp(argv[i], "-I", 2) == 0)
{
std::string path;
// "-I path/"
if (strcmp(argv[i], "-I") == 0)
{
++i;
if (i >= argc)
throw std::runtime_error("cppcheck: argument to '-I' is missing");
path = argv[i];
}
// "-Ipath/"
else
{
path = argv[i];
path = path.substr(2);
}
// If path doesn't end with / or \, add it
if (path[path.length()-1] != '/' && path[path.length()-1] != '\\')
path += '/';
_settings._includePaths.push_back(path);
}
// Output formatter
else if (strcmp(argv[i], "--template") == 0)
{
// "--template path/"
++i;
if (i >= argc)
throw std::runtime_error("cppcheck: argument to '--template' is missing");
_settings._outputFormat = argv[i];
if (_settings._outputFormat == "gcc")
_settings._outputFormat = "{file}:{line}: {severity}: {message}";
else if (_settings._outputFormat == "vs")
_settings._outputFormat = "{file}({line}): {severity}: {message}";
}
// Include paths
else if (strcmp(argv[i], "-j") == 0 ||
strncmp(argv[i], "-j", 2) == 0)
{
std::string numberString;
// "-j 3"
if (strcmp(argv[i], "-j") == 0)
{
++i;
if (i >= argc)
throw std::runtime_error("cppcheck: argument to '-j' is missing");
numberString = argv[i];
}
// "-j3"
else if (strncmp(argv[i], "-j", 2) == 0)
{
numberString = argv[i];
numberString = numberString.substr(2);
}
std::istringstream iss(numberString);
if (!(iss >> _settings._jobs))
throw std::runtime_error("cppcheck: argument to '-j' is not a number");
if (_settings._jobs > 1000)
{
throw std::runtime_error("cppcheck: argument for '-j' is allowed to be 1000 at max");
}
}
// auto deallocated classes..
else if (strcmp(argv[i], "--auto-dealloc") == 0)
{
++i;
if (i >= argc || !strstr(argv[i], ".lst"))
throw std::runtime_error("cppcheck: No .lst file specified for the --auto-dealloc option");
std::ifstream f(argv[i]);
if (!f.is_open())
throw std::runtime_error("cppcheck: couldn't open the file \"" + std::string(argv[i+1]) + "\"");
_settings.autoDealloc(f);
}
// print all possible error messages..
else if (strcmp(argv[i], "--errorlist") == 0)
{
// call all "getErrorMessages" in all registered Check classes
std::cout << ErrorLogger::ErrorMessage::getXMLHeader();
for (std::list<Check *>::iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
{
(*it)->getErrorMessages();
}
Tokenizer tokenizer(&_settings, 0);
tokenizer.getErrorMessages();
std::cout << ErrorLogger::ErrorMessage::getXMLFooter() << std::endl;
}
// documentation..
else if (strcmp(argv[i], "--doc") == 0)
{
std::ostringstream doc;
// Get documentation..
for (std::list<Check *>::iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
{
doc << "===" << (*it)->name() << "===\n"
<< (*it)->classInfo() << "\n\n";
}
doc << "===" << "Unused functions" << "===\n"
<< "Check for functions that are never called\n";
std::string doc2(doc.str());
while (doc2.find("\n\n\n") != std::string::npos)
doc2.erase(doc2.find("\n\n\n"), 1);
std::cout << doc2;
return;
}
else if (strncmp(argv[i], "-", 1) == 0 || strncmp(argv[i], "--", 2) == 0)
{
throw std::runtime_error("cppcheck: error: unrecognized command line option \"" + std::string(argv[i]) + "\"");
}
else
pathnames.push_back(argv[i]);
}
if (_settings.isEnabled("unusedFunctions") && _settings._jobs > 1)
{
reportOut("unusedFunctions check can't be used with -j option, so it was disabled.");
}
if (pathnames.size() > 0)
{
// Execute recursiveAddFiles() to each given file parameter
std::vector<std::string>::const_iterator iter;
for (iter = pathnames.begin(); iter != pathnames.end(); iter++)
FileLister::recursiveAddFiles(_filenames, iter->c_str(), true);
}
if (argc <= 1 || showHelp)
{
std::ostringstream oss;
oss << "Cppcheck - A tool for static C/C++ code analysis\n"
"\n"
"Syntax:\n"
" cppcheck [--all] [--append=file] [--auto-dealloc file.lst] [--enable]\n"
" [--error-exitcode=[n]] [--force] [--help] [-Idir] [-j [jobs]]\n"
" [--quiet] [--style] [--suppressions file.txt] [--verbose]\n"
" [--version] [--xml] [file or path1] [file or path] ...\n"
"\n"
"If path is given instead of filename, *.cpp, *.cxx, *.cc, *.c++ and *.c files\n"
"are checked recursively from given directory.\n\n"
"Options:\n"
" -a, --all deprecated, use --enable=possibleError\n"
" --append=file This allows you to provide information about\n"
" functions by providing an implementation for these.\n"
" --auto-dealloc file Suppress warnings about classes that have automatic\n"
" deallocation.\n"
" The classnames must be provided in plain text - one\n"
" classname / line - in a .lst file.\n"
" This option can be used several times, allowing you to\n"
" specify several .lst files.\n"
" --enable Enable all extra checks\n"
" --enable=id Enable specific checks. The available ids are:\n"
" * exceptNew - exception safety when using new\n"
" * exceptRealloc - exception safety when reallocating\n"
" * possibleError - Make the checking more sensitive.\n"
" More bugs are detected, but there are also\n"
" more false positives\n"
" * style - Check coding style\n"
" * unusedFunctions - check for unused functions\n"
" Several ids can be given if you separate them with commas\n"
" --error-exitcode=[n] If errors are found, integer [n] is returned instead\n"
" of default 0. EXIT_FAILURE is returned\n"
" if arguments are not valid or if no input files are\n"
" provided. Note that your operating system can\n"
" modify this value, e.g. 256 can become 0.\n"
" -f, --force Force checking on files that have \"too many\"\n"
" configurations\n"
" -h, --help Print this help\n"
" -I [dir] Give include path. Give several -I parameters to give\n"
" several paths. First given path is checked first. If\n"
" paths are relative to source files, this is not needed\n"
" -j [jobs] Start [jobs] threads to do the checking simultaneously.\n"
" -q, --quiet Only print error messages\n"
" -s, --style deprecated, use --enable=style\n"
" --suppressions file Suppress warnings listed in the file. Filename and line\n"
" are optional. The format of the single line in file is:\n"
" [error id]:[filename]:[line]\n"
" --template '[text]' Format the error messages. E.g.\n"
" '{file}:{line},{severity},{id},{message}' or\n"
" '{file}({line}):({severity}) {message}'\n"
" Pre-defined templates: gcc, vs\n"
" --unused-functions deprecated, use --enable=unusedFunctions\n"
" -v, --verbose More detailed error reports\n"
" --version Print out version number\n"
" --xml Write results in xml to error stream.\n"
"\n"
"Example usage:\n"
" # Recursively check the current folder. Print the progress on the screen and\n"
" write errors in a file:\n"
" cppcheck . 2> err.txt\n"
" # Recursively check ../myproject/ and print only most fatal errors:\n"
" cppcheck --quiet ../myproject/\n"
" # Check only files one.cpp and two.cpp and give all information there is:\n"
" cppcheck -v -a -s one.cpp two.cpp\n"
" # Check f.cpp and search include files from inc1/ and inc2/:\n"
" cppcheck -I inc1/ -I inc2/ f.cpp\n";
reportOut(oss.str());
}
else if (_filenames.empty())
{
throw std::runtime_error("cppcheck: No C or C++ source files found.");
}
}
unsigned int CppCheck::check()
{
_checkUnusedFunctions.setErrorLogger(this);
std::sort(_filenames.begin(), _filenames.end());
for (unsigned int c = 0; c < _filenames.size(); c++)
{
_errout.str("");
std::string fname = _filenames[c];
if (_settings._errorsOnly == false)
_errorLogger.reportOut(std::string("Checking ") + fname + std::string("..."));
try
{
Preprocessor preprocessor(&_settings, this);
std::list<std::string> configurations;
std::string filedata = "";
if (_fileContents.size() > 0 && _fileContents.find(_filenames[c]) != _fileContents.end())
{
// File content was given as a string
std::istringstream iss(_fileContents[ _filenames[c] ]);
preprocessor.preprocess(iss, filedata, configurations, fname, _settings._includePaths);
}
else
{
// Only file name was given, read the content from file
std::ifstream fin(fname.c_str());
TIMER_START();
preprocessor.preprocess(fin, filedata, configurations, fname, _settings._includePaths);
TIMER_END("Preprocessor::preprocess");
}
int checkCount = 0;
for (std::list<std::string>::const_iterator it = configurations.begin(); it != configurations.end(); ++it)
{
// Check only 12 first configurations, after that bail out, unless --force
// was used.
if (!_settings._force && checkCount > 11)
{
if (_settings._errorsOnly == false)
_errorLogger.reportOut(std::string("Bailing out from checking ") + fname + ": Too many configurations. Recheck this file with --force if you want to check them all.");
break;
}
cfg = *it;
TIMER_START();
const std::string codeWithoutCfg = Preprocessor::getcode(filedata, *it, fname, &_errorLogger);
TIMER_END("Preprocessor::getcode");
// If only errors are printed, print filename after the check
if (_settings._errorsOnly == false && it != configurations.begin())
_errorLogger.reportOut(std::string("Checking ") + fname + ": " + cfg + std::string("..."));
checkFile(codeWithoutCfg + _settings.append(), _filenames[c].c_str());
++checkCount;
}
}
catch (std::runtime_error &e)
{
// Exception was thrown when checking this file..
_errorLogger.reportOut("Bailing out from checking " + fname + ": " + e.what());
}
_errorLogger.reportStatus(c + 1, (unsigned int)_filenames.size());
}
// This generates false positives - especially for libraries
_settings._verbose = false;
if (_settings.isEnabled("unusedFunctions") && _settings._jobs == 1)
{
_errout.str("");
if (_settings._errorsOnly == false)
_errorLogger.reportOut("Checking usage of global functions..");
_checkUnusedFunctions.check();
}
unsigned int result = static_cast<unsigned int>(_errorList.size());
_errorList.clear();
return result;
}
//---------------------------------------------------------------------------
// CppCheck - A function that checks a specified file
//---------------------------------------------------------------------------
void CppCheck::checkFile(const std::string &code, const char FileName[])
{
Tokenizer _tokenizer(&_settings, this);
// Tokenize the file
{
std::istringstream istr(code);
TIMER_START();
if (!_tokenizer.tokenize(istr, FileName))
{
// File had syntax errors, abort
return;
}
TIMER_END("Tokenizer::tokenize");
}
{
TIMER_START();
_tokenizer.fillFunctionList();
TIMER_END("Tokenizer::fillFunctionList");
}
// call all "runChecks" in all registered Check classes
for (std::list<Check *>::iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
{
TIMER_START();
(*it)->runChecks(&_tokenizer, &_settings, this);
TIMER_END((*it)->name() << "::runChecks");
}
{
TIMER_START();
bool result = _tokenizer.simplifyTokenList();
TIMER_END("Tokenizer::simplifyTokenList");
if (!result)
return;
}
if (_settings.isEnabled("unusedFunctions") && _settings._jobs == 1)
_checkUnusedFunctions.parseTokens(_tokenizer);
// call all "runSimplifiedChecks" in all registered Check classes
for (std::list<Check *>::iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
{
TIMER_START();
(*it)->runSimplifiedChecks(&_tokenizer, &_settings, this);
TIMER_END((*it)->name() << "::runSimplifiedChecks");
}
}
Settings CppCheck::settings() const
{
return _settings;
}
//---------------------------------------------------------------------------
void CppCheck::reportErr(const ErrorLogger::ErrorMessage &msg)
{
std::string errmsg = msg.toText();
// Alert only about unique errors
if (std::find(_errorList.begin(), _errorList.end(), errmsg) != _errorList.end())
return;
std::string file;
unsigned int line(0);
if (!msg._callStack.empty())
{
file = msg._callStack.back().getfile();
line = msg._callStack.back().line;
}
if (_settings.isSuppressed(msg._id, file, line))
return;
_errorList.push_back(errmsg);
std::string errmsg2(errmsg);
if (_settings._verbose)
{
errmsg2 += "\n Defines=\'" + cfg + "\'\n";
}
_errorLogger.reportErr(msg);
_errout << errmsg2 << std::endl;
}
void CppCheck::reportOut(const std::string &outmsg)
{
_errorLogger.reportOut(outmsg);
}
const std::vector<std::string> &CppCheck::filenames() const
{
return _filenames;
}
void CppCheck::reportStatus(unsigned int /*index*/, unsigned int /*max*/)
{
}
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