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cppcheck/lib/cppcheck.cpp

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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2011 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 "check.h"
#include "path.h"
#include <algorithm>
#include <iostream>
#include <fstream>
#include <stdexcept>
#include <ctime>
#include "timer.h"
#ifdef HAVE_RULES
#define PCRE_STATIC
#include <pcre.h>
#endif
static TimerResults S_timerResults;
CppCheck::CppCheck(ErrorLogger &errorLogger, bool useGlobalSuppressions)
: _useGlobalSuppressions(useGlobalSuppressions), _errorLogger(errorLogger)
{
exitcode = 0;
}
CppCheck::~CppCheck()
{
if (_settings._showtime != SHOWTIME_NONE)
S_timerResults.ShowResults();
}
void CppCheck::settings(const Settings &currentSettings)
{
_settings = currentSettings;
}
const char * CppCheck::version()
{
return "1.49";
}
unsigned int CppCheck::check(const std::string &path)
{
_filename = path;
return processFile();
}
unsigned int CppCheck::check(const std::string &path, const std::string &content)
{
_filename = path;
_fileContent = content;
const unsigned int retval = processFile();
_fileContent.clear();
return retval;
}
unsigned int CppCheck::processFile()
{
exitcode = 0;
// TODO: Should this be moved out to its own function so all the files can be
// analysed before any files are checked?
if (_settings.test_2_pass && _settings._jobs == 1)
{
const std::string printname = Path::toNativeSeparators(_filename);
reportOut("Analysing " + printname + "...");
std::ifstream f(_filename.c_str());
analyseFile(f, _filename);
}
_errout.str("");
if (_settings.terminated())
return exitcode;
if (_settings._errorsOnly == false)
{
std::string fixedpath(_filename);
fixedpath = Path::simplifyPath(fixedpath.c_str());
fixedpath = Path::toNativeSeparators(fixedpath);
_errorLogger.reportOut(std::string("Checking ") + fixedpath + std::string("..."));
}
try
{
Preprocessor preprocessor(&_settings, this);
std::list<std::string> configurations;
std::string filedata = "";
if (!_fileContent.empty())
{
// File content was given as a string
std::istringstream iss(_fileContent);
preprocessor.preprocess(iss, filedata, configurations, _filename, _settings._includePaths);
}
else
{
// Only file name was given, read the content from file
std::ifstream fin(_filename.c_str());
Timer t("Preprocessor::preprocess", _settings._showtime, &S_timerResults);
preprocessor.preprocess(fin, filedata, configurations, _filename, _settings._includePaths);
}
if (_settings.checkConfiguration)
{
return 0;
}
_settings.ifcfg = bool(configurations.size() > 1);
if (!_settings.userDefines.empty())
{
configurations.clear();
configurations.push_back(_settings.userDefines);
}
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)
{
const std::string fixedpath = Path::toNativeSeparators(_filename);
ErrorLogger::ErrorMessage::FileLocation location;
location.setfile(fixedpath);
std::list<ErrorLogger::ErrorMessage::FileLocation> loclist;
loclist.push_back(location);
const std::string msg("Interrupted checking because of too many #ifdef configurations.\n"
"The checking of the file was interrupted because there were 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.");
ErrorLogger::ErrorMessage errmsg(loclist,
Severity::information,
msg,
"toomanyconfigs",
false);
_errorLogger.reportErr(errmsg);
break;
}
cfg = *it;
Timer t("Preprocessor::getcode", _settings._showtime, &S_timerResults);
const std::string codeWithoutCfg = Preprocessor::getcode(filedata, *it, _filename, &_settings, &_errorLogger);
t.Stop();
// If only errors are printed, print filename after the check
if (_settings._errorsOnly == false && it != configurations.begin())
{
std::string fixedpath = Path::simplifyPath(_filename.c_str());
fixedpath = Path::toNativeSeparators(fixedpath);
_errorLogger.reportOut(std::string("Checking ") + fixedpath + ": " + cfg + std::string("..."));
}
std::string appendCode = _settings.append();
if (!appendCode.empty())
Preprocessor::preprocessWhitespaces(appendCode);
checkFile(codeWithoutCfg + appendCode, _filename.c_str());
++checkCount;
}
}
catch (std::runtime_error &e)
{
// Exception was thrown when checking this file..
const std::string fixedpath = Path::toNativeSeparators(_filename);
_errorLogger.reportOut("Bailing out from checking " + fixedpath + ": " + e.what());
}
reportUnmatchedSuppressions(_settings.nomsg.getUnmatchedLocalSuppressions(_filename));
// This generates false positives - especially for libraries
const bool verbose_orig = _settings._verbose;
_settings._verbose = false;
if (_settings.isEnabled("unusedFunction") && _settings._jobs == 1)
{
_errout.str("");
if (_settings._errorsOnly == false)
_errorLogger.reportOut("Checking usage of global functions..");
_checkUnusedFunctions.check(this);
}
_settings._verbose = verbose_orig;
_errorList.clear();
return exitcode;
}
void CppCheck::analyseFile(std::istream &fin, const std::string &filename)
{
// Preprocess file..
Preprocessor preprocessor(&_settings, this);
std::list<std::string> configurations;
std::string filedata = "";
preprocessor.preprocess(fin, filedata, configurations, filename, _settings._includePaths);
const std::string code = Preprocessor::getcode(filedata, "", filename, &_settings, &_errorLogger);
if (_settings.checkConfiguration)
{
return;
}
// Tokenize..
Tokenizer tokenizer(&_settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, filename.c_str(), "");
tokenizer.simplifyTokenList();
// Analyse the tokens..
std::set<std::string> data;
for (std::list<Check *>::const_iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
{
(*it)->analyse(tokenizer.tokens(), data);
}
// Save analysis results..
// TODO: This loop should be protected by a mutex or something like that
// The saveAnalysisData must _not_ be called from many threads at the same time.
for (std::list<Check *>::const_iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
{
(*it)->saveAnalysisData(data);
}
}
//---------------------------------------------------------------------------
// CppCheck - A function that checks a specified file
//---------------------------------------------------------------------------
void CppCheck::checkFile(const std::string &code, const char FileName[])
{
if (_settings.terminated() || _settings.checkConfiguration)
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("unusedFunction") && _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);
}
#ifdef HAVE_RULES
// Are there extra rules?
if (!_settings.rules.empty())
{
std::ostringstream ostr;
for (const Token *tok = _tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
const std::string str(ostr.str());
for (std::list<Settings::Rule>::const_iterator it = _settings.rules.begin(); it != _settings.rules.end(); ++it)
{
const Settings::Rule &rule = *it;
if (rule.pattern.empty() || rule.id.empty() || rule.severity.empty())
continue;
const char *error = 0;
int erroffset = 0;
pcre *re = pcre_compile(rule.pattern.c_str(),0,&error,&erroffset,NULL);
if (!re && error)
{
ErrorLogger::ErrorMessage errmsg(std::list<ErrorLogger::ErrorMessage::FileLocation>(),
Severity::error,
error,
"pcre_compile",
false);
reportErr(errmsg);
}
if (!re)
continue;
int pos = 0;
int ovector[30];
while (0 <= pcre_exec(re, NULL, str.c_str(), (int)str.size(), pos, 0, ovector, 30))
{
unsigned int pos1 = (unsigned int)ovector[0];
unsigned int pos2 = (unsigned int)ovector[1];
// jump to the end of the match for the next pcre_exec
pos = (int)pos2;
// determine location..
ErrorLogger::ErrorMessage::FileLocation loc;
loc.setfile(_tokenizer.getFiles()->front());
loc.line = 0;
unsigned int len = 0;
for (const Token *tok = _tokenizer.tokens(); tok; tok = tok->next())
{
len = len + 1 + tok->str().size();
if (len > pos1)
{
loc.setfile(_tokenizer.getFiles()->at(tok->fileIndex()));
loc.line = tok->linenr();
break;
}
}
const std::list<ErrorLogger::ErrorMessage::FileLocation> callStack(1, loc);
// Create error message
std::string summary;
if (rule.summary.empty())
summary = "found '" + str.substr(pos1, pos2 - pos1) + "'";
else
summary = rule.summary;
const ErrorLogger::ErrorMessage errmsg(callStack, Severity::fromString(rule.severity), summary, rule.id, false);
// Report error
reportErr(errmsg);
}
pcre_free(re);
}
}
#endif
}
Settings &CppCheck::settings()
{
return _settings;
}
//---------------------------------------------------------------------------
void CppCheck::reportErr(const ErrorLogger::ErrorMessage &msg)
{
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;
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);
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);
}
void CppCheck::reportProgress(const std::string &filename, const char stage[], const unsigned int value)
{
_errorLogger.reportProgress(filename, stage, value);
}
void CppCheck::reportStatus(unsigned int /*fileindex*/, unsigned int /*filecount*/, long /*sizedone*/, long /*sizetotal*/)
{
}
void CppCheck::getErrorMessages()
{
// 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 tokenizer(&_settings, 0);
tokenizer.getErrorMessages(this, &_settings);
Preprocessor::getErrorMessages(this, &_settings);
}
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