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cppcheck/lib/cppcheck.cpp

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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2010 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>
#include <ctime>
/*
TODO:
- handle SHOWTIME_TOP5 in TimerResults
- sort list by time
- do not sort the results alphabetically
- rename "file" to "single"
- synchronise map access in multithreaded mode or disable timing
- add unit tests
- for --showtime (needs input file)
- for Timer* classes
- move timer stuff to seperate source/header
*/
enum
{
SHOWTIME_NONE = 0,
SHOWTIME_FILE,
SHOWTIME_SUMMARY,
SHOWTIME_TOP5
};
class TimerResultsIntf
{
public:
virtual ~TimerResultsIntf() { }
virtual void AddResults(const std::string& str, std::clock_t clocks) = 0;
};
struct TimerResultsData
{
std::clock_t _clocks;
unsigned int _numberOfResults;
TimerResultsData()
: _clocks(0)
, _numberOfResults(0)
{
}
};
class TimerResults : public TimerResultsIntf
{
public:
TimerResults()
{
}
void ShowResults()
{
std::clock_t overallClocks = 0;
std::map<std::string, struct TimerResultsData>::const_iterator I = _results.begin();
const std::map<std::string, struct TimerResultsData>::const_iterator E = _results.end();
while (I != E)
{
const double sec = (double)I->second._clocks / CLOCKS_PER_SEC;
const double secAverage = (double)(I->second._clocks / I->second._numberOfResults) / CLOCKS_PER_SEC;
std::cout << I->first << ": " << sec << "s (avg. " << secAverage << "s - " << I->second._numberOfResults << " result(s))" << std::endl;
overallClocks += I->second._clocks;
++I;
}
const double secOverall = (double)overallClocks / CLOCKS_PER_SEC;
std::cout << "Overall time: " << secOverall << "s" << std::endl;
}
virtual void AddResults(const std::string& str, std::clock_t clocks)
{
_results[str]._clocks += clocks;
_results[str]._numberOfResults++;
}
private:
std::map<std::string, struct TimerResultsData> _results;
};
static TimerResults S_timerResults;
class Timer
{
public:
Timer(const std::string& str, unsigned int showtimeMode, TimerResultsIntf* timerResults = NULL)
: _str(str)
, _showtimeMode(showtimeMode)
, _start(0)
, _stopped(false)
, _timerResults(timerResults)
{
if (showtimeMode != SHOWTIME_NONE)
_start = std::clock();
}
~Timer()
{
Stop();
}
void Stop()
{
if ((_showtimeMode != SHOWTIME_NONE) && !_stopped)
{
const std::clock_t end = std::clock();
const std::clock_t diff = end - _start;
if (_showtimeMode == SHOWTIME_FILE)
{
double sec = (double)diff / CLOCKS_PER_SEC;
std::cout << _str << ": " << sec << "s" << std::endl;
}
else
{
if (_timerResults)
_timerResults->AddResults(_str, diff);
}
}
_stopped = true;
}
private:
Timer& operator=(const Timer&); // disallow assignments
const std::string _str;
const unsigned int _showtimeMode;
std::clock_t _start;
bool _stopped;
TimerResultsIntf* _timerResults;
};
//---------------------------------------------------------------------------
CppCheck::CppCheck(ErrorLogger &errorLogger)
: _errorLogger(errorLogger)
{
exitcode = 0;
}
CppCheck::~CppCheck()
{
if (_settings._showtime != SHOWTIME_NONE)
S_timerResults.ShowResults();
}
void CppCheck::settings(const Settings &currentSettings)
{
_settings = currentSettings;
}
void CppCheck::addFile(const std::string &path)
{
getFileLister()->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 "1.43";
}
static void AddFilesToList(const std::string& FileList, std::vector<std::string>& PathNames)
{
// to keep things initially simple, if the file can't be opened, just be
// silent and move on
// ideas : we could also require this should be an xml file, with the filenames
// specified in an xml structure
// we could elaborate this then, to also include the I-paths, ...
// basically for everything that makes the command line very long
// xml is a bonus then, since we can easily extend it
// we need a good parser then -> suggestion : TinyXml
// drawback : creates a dependency
std::ifstream Files(FileList.c_str());
if (Files)
{
std::string FileName;
while (std::getline(Files, FileName)) // next line
{
if (!FileName.empty())
{
PathNames.push_back(FileName);
}
}
}
}
bool 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 true;
}
// Flag used for various purposes during debugging
else if (strcmp(argv[i], "--debug") == 0)
_settings._debug = true;
// Inconclusive checking - keep this for compatibility but don't
// handle it
else if (strcmp(argv[i], "-a") == 0 || strcmp(argv[i], "--all") == 0)
;
// 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)
{
reportOut("cppcheck: No file specified for the --suppressions option");
return false;
}
std::ifstream f(argv[i]);
if (!f.is_open())
{
reportOut("cppcheck: Couldn't open the file \"" + std::string(argv[i]) + "\"");
return false;
}
_settings.nomsg.parseFile(f);
}
// Filter errors
else if (strcmp(argv[i], "--exitcode-suppressions") == 0)
{
++i;
if (i >= argc)
{
reportOut("cppcheck: No file specified for the --exitcode-suppressions option");
return false;
}
std::ifstream f(argv[i]);
if (!f.is_open())
{
reportOut("cppcheck: Couldn't open the file \"" + std::string(argv[i]) + "\"");
return false;
}
_settings.nofail.parseFile(f);
}
// Enables inline suppressions.
else if (strcmp(argv[i], "--inline-suppr") == 0)
_settings._inlineSuppressions = true;
// 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 (strncmp(argv[i], "--showtime=", 11) == 0)
{
const std::string showtimeMode = argv[i] + 11;
if (showtimeMode == "file")
_settings._showtime = SHOWTIME_FILE;
else if (showtimeMode == "summary")
_settings._showtime = SHOWTIME_SUMMARY;
else if (showtimeMode == "top5")
_settings._showtime = SHOWTIME_TOP5;
else
_settings._showtime = SHOWTIME_NONE;
}
// 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;
reportOut("cppcheck: Argument must be an integer. Try something like '--error-exitcode=1'");
return false;
}
}
// 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)
{
reportOut("cppcheck: argument to '-I' is missing");
return false;
}
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);
}
// file list specified
else if (strncmp(argv[i], "--file-list=", 12) == 0)
{
// open this file and read every input file (1 file name per line)
AddFilesToList(12 + argv[i], pathnames);
}
// Output formatter
else if (strcmp(argv[i], "--template") == 0)
{
// "--template path/"
++i;
if (i >= argc)
{
reportOut("cppcheck: argument to '--template' is missing");
return false;
}
_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}";
}
// Checking threads
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)
{
reportOut("cppcheck: argument to '-j' is missing");
return false;
}
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))
{
reportOut("cppcheck: argument to '-j' is not a number");
return false;
}
if (_settings._jobs > 1000)
{
reportOut("cppcheck: argument for '-j' is allowed to be 1000 at max");
return false;
}
}
// auto deallocated classes..
else if (strcmp(argv[i], "--auto-dealloc") == 0)
{
++i;
if (i >= argc || !strstr(argv[i], ".lst"))
{
reportOut("cppcheck: No .lst file specified for the --auto-dealloc option");
return false;
}
std::ifstream f(argv[i]);
if (!f.is_open())
{
reportOut("cppcheck: couldn't open the file \"" + std::string(argv[i+1]) + "\"");
return false;
}
_settings.autoDealloc(f);
}
// print all possible error messages..
else if (strcmp(argv[i], "--errorlist") == 0)
{
getErrorMessages();
return true;
}
// 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";
}
std::string doc2(doc.str());
while (doc2.find("\n\n\n") != std::string::npos)
doc2.erase(doc2.find("\n\n\n"), 1);
reportOut(doc2);
return true;
}
else if (strncmp(argv[i], "-", 1) == 0 || strncmp(argv[i], "--", 2) == 0)
{
reportOut("cppcheck: error: unrecognized command line option \"" + std::string(argv[i]) + "\"");
return false;
}
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.empty())
{
// Execute recursiveAddFiles() to each given file parameter
std::vector<std::string>::const_iterator iter;
for (iter = pathnames.begin(); iter != pathnames.end(); ++iter)
getFileLister()->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 [--append=file] [--enable=<id>] [--error-exitcode=[n]]\n"
" [--exitcode-suppressions file] [--file-list=file.txt] [--force]\n"
" [--help] [-Idir] [--inline-suppr] [-j [jobs]] [--quiet] [--style]\n"
" [--suppressions file.txt] [--verbose] [--version] [--xml]\n"
" [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"
" --append=file This allows you to provide information about\n"
" functions by providing an implementation for these.\n"
" --enable=id Enable specific checks. The available ids are:\n"
" * all - enable all checks\n"
" * exceptNew - exception safety when using new\n"
" * exceptRealloc - exception safety when reallocating\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"
" --exitcode-suppressions file\n"
" Used when certain messages should be displayed but\n"
" should not cause a non-zero exitcode.\n"
" --file-list=file Specify the files to check in a text file. One Filename per line.\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"
" --inline-suppr Enable inline suppressions. Use them by placing one or\n"
" more comments in the form: // cppcheck-suppress memleak\n"
" on the lines before the warning to suppress.\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"
" -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 don't print progress:\n"
" cppcheck --quiet ../myproject/\n"
" # Check only files one.cpp and two.cpp and give all information there is:\n"
" cppcheck -v -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())
{
reportOut("cppcheck: No C or C++ source files found.");
return false;
}
return true;
}
unsigned int CppCheck::check()
{
exitcode = 0;
_checkUnusedFunctions.setErrorLogger(this);
std::sort(_filenames.begin(), _filenames.end());
for (unsigned int c = 0; c < _filenames.size(); c++)
{
_errout.str("");
const std::string fname = _filenames[c];
if (_settings.terminated())
break;
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 t("Preprocessor::preprocess", _settings._showtime, &S_timerResults);
preprocessor.preprocess(fin, filedata, configurations, fname, _settings._includePaths);
}
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 t("Preprocessor::getcode", _settings._showtime, &S_timerResults);
const std::string codeWithoutCfg = Preprocessor::getcode(filedata, *it, fname, &_errorLogger);
t.Stop();
// 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("..."));
std::string appendCode = _settings.append();
if( !appendCode.empty() )
Preprocessor::preprocessWhitespaces(appendCode);
checkFile(codeWithoutCfg + appendCode, _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();
}
_errorList.clear();
return exitcode;
}
//---------------------------------------------------------------------------
// CppCheck - A function that checks a specified file
//---------------------------------------------------------------------------
void CppCheck::checkFile(const std::string &code, const char FileName[])
{
if (_settings.terminated())
return;
Tokenizer _tokenizer(&_settings, this);
bool result;
// Tokenize the file
std::istringstream istr(code);
Timer timer("Tokenizer::tokenize", _settings._showtime, &S_timerResults);
result = _tokenizer.tokenize(istr, FileName, cfg);
timer.Stop();
if (!result)
{
// File had syntax errors, abort
return;
}
Timer timer2("Tokenizer::fillFunctionList", _settings._showtime, &S_timerResults);
_tokenizer.fillFunctionList();
timer2.Stop();
// call all "runChecks" in all registered Check classes
for (std::list<Check *>::iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
{
if (_settings.terminated())
return;
Timer timerRunChecks((*it)->name() + "::runChecks", _settings._showtime, &S_timerResults);
(*it)->runChecks(&_tokenizer, &_settings, this);
}
Timer timer3("Tokenizer::simplifyTokenList", _settings._showtime, &S_timerResults);
result = _tokenizer.simplifyTokenList();
timer3.Stop();
if (!result)
return;
Timer timer4("Tokenizer::fillFunctionList", _settings._showtime, &S_timerResults);
_tokenizer.fillFunctionList();
timer4.Stop();
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)
{
if (_settings.terminated())
return;
Timer timerSimpleChecks((*it)->name() + "::runSimplifiedChecks", _settings._showtime, &S_timerResults);
(*it)->runSimplifiedChecks(&_tokenizer, &_settings, this);
}
}
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.nomsg.isSuppressed(msg._id, file, line))
return;
if (!_settings.nofail.isSuppressed(msg._id, file, line))
exitcode = 1;
_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*/)
{
}
void CppCheck::getErrorMessages()
{
// 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;
}
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