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cppcheck/lib/cppcheck.cpp

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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2023 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 "addoninfo.h"
#include "check.h"
#include "checkunusedfunctions.h"
#include "clangimport.h"
#include "color.h"
#include "ctu.h"
#include "errortypes.h"
#include "filesettings.h"
#include "library.h"
#include "path.h"
#include "platform.h"
#include "preprocessor.h"
#include "standards.h"
#include "suppressions.h"
#include "timer.h"
#include "token.h"
#include "tokenize.h"
#include "tokenlist.h"
#include "utils.h"
#include "valueflow.h"
#include "version.h"
#include <algorithm>
#include <cassert>
#include <cstdio>
#include <cstdint>
#include <cstring>
#include <cctype>
#include <cstdlib>
#include <ctime>
#include <exception>
#include <fstream>
#include <iostream> // <- TEMPORARY
#include <new>
#include <set>
#include <sstream> // IWYU pragma: keep
#include <stdexcept>
#include <string>
#include <unordered_set>
#include <utility>
#include <vector>
#ifndef _WIN32
#include <unistd.h>
#else
#include <process.h>
#endif
#include "json.h"
#include <simplecpp.h>
#include "xml.h"
#ifdef HAVE_RULES
#ifdef _WIN32
#define PCRE_STATIC
#endif
#include <pcre.h>
#endif
class SymbolDatabase;
static constexpr char Version[] = CPPCHECK_VERSION_STRING;
static constexpr char ExtraVersion[] = "";
static constexpr char FILELIST[] = "cppcheck-addon-ctu-file-list";
static TimerResults s_timerResults;
// CWE ids used
static const CWE CWE398(398U); // Indicator of Poor Code Quality
// File deleter
namespace {
class FilesDeleter {
public:
FilesDeleter() = default;
~FilesDeleter() {
for (const std::string& fileName: mFilenames)
std::remove(fileName.c_str());
}
void addFile(const std::string& fileName) {
mFilenames.push_back(fileName);
}
private:
std::vector<std::string> mFilenames;
};
}
static std::string cmdFileName(std::string f)
{
f = Path::toNativeSeparators(f);
if (f.find(' ') != std::string::npos)
return "\"" + f + "\"";
return f;
}
static std::vector<std::string> split(const std::string &str, const std::string &sep=" ")
{
std::vector<std::string> ret;
for (std::string::size_type startPos = 0U; startPos < str.size();) {
startPos = str.find_first_not_of(sep, startPos);
if (startPos == std::string::npos)
break;
if (str[startPos] == '\"') {
const std::string::size_type endPos = str.find('\"', startPos + 1);
ret.push_back(str.substr(startPos + 1, endPos - startPos - 1));
startPos = (endPos < str.size()) ? (endPos + 1) : endPos;
continue;
}
const std::string::size_type endPos = str.find(sep, startPos + 1);
ret.push_back(str.substr(startPos, endPos - startPos));
startPos = endPos;
}
return ret;
}
static int getPid()
{
#ifndef _WIN32
return getpid();
#else
return _getpid();
#endif
}
static std::string getDumpFileName(const Settings& settings, const std::string& filename)
{
if (!settings.dumpFile.empty())
return settings.dumpFile;
std::string extension;
if (settings.dump)
extension = ".dump";
else
extension = "." + std::to_string(getPid()) + ".dump";
if (!settings.dump && !settings.buildDir.empty())
return AnalyzerInformation::getAnalyzerInfoFile(settings.buildDir, filename, emptyString) + extension;
return filename + extension;
}
static std::string getCtuInfoFileName(const std::string &dumpFile)
{
return dumpFile.substr(0, dumpFile.size()-4) + "ctu-info";
}
static void createDumpFile(const Settings& settings,
const std::string& filename,
std::ofstream& fdump,
std::string& dumpFile)
{
if (!settings.dump && settings.addons.empty())
return;
dumpFile = getDumpFileName(settings, filename);
fdump.open(dumpFile);
if (!fdump.is_open())
return;
{
std::ofstream fout(getCtuInfoFileName(dumpFile));
}
std::string language;
switch (settings.enforcedLang) {
case Settings::Language::C:
language = " language=\"c\"";
break;
case Settings::Language::CPP:
language = " language=\"cpp\"";
break;
case Settings::Language::None:
if (Path::isCPP(filename))
language = " language=\"cpp\"";
else if (Path::isC(filename))
language = " language=\"c\"";
break;
}
fdump << "<?xml version=\"1.0\"?>\n";
fdump << "<dumps" << language << ">\n";
fdump << " <platform"
<< " name=\"" << settings.platform.toString() << '\"'
<< " char_bit=\"" << settings.platform.char_bit << '\"'
<< " short_bit=\"" << settings.platform.short_bit << '\"'
<< " int_bit=\"" << settings.platform.int_bit << '\"'
<< " long_bit=\"" << settings.platform.long_bit << '\"'
<< " long_long_bit=\"" << settings.platform.long_long_bit << '\"'
<< " pointer_bit=\"" << (settings.platform.sizeof_pointer * settings.platform.char_bit) << '\"'
<< "/>" << '\n';
}
static std::string detectPython(const CppCheck::ExecuteCmdFn &executeCommand)
{
#ifdef _WIN32
const char *py_exes[] = { "python3.exe", "python.exe" };
#else
const char *py_exes[] = { "python3", "python" };
#endif
for (const char* py_exe : py_exes) {
std::string out;
#ifdef _MSC_VER
// FIXME: hack to avoid debug assertion with _popen() in executeCommand() for non-existing commands
const std::string cmd = std::string(py_exe) + " --version >NUL 2>&1";
if (system(cmd.c_str()) != 0) {
// TODO: get more detailed error?
continue;
}
#endif
if (executeCommand(py_exe, split("--version"), "2>&1", out) == EXIT_SUCCESS && startsWith(out, "Python ") && std::isdigit(out[7])) {
return py_exe;
}
}
return "";
}
static std::vector<picojson::value> executeAddon(const AddonInfo &addonInfo,
const std::string &defaultPythonExe,
const std::string &file,
const std::string &premiumArgs,
const CppCheck::ExecuteCmdFn &executeCommand)
{
const std::string redirect = "2>&1";
std::string pythonExe;
if (!addonInfo.executable.empty())
pythonExe = addonInfo.executable;
else if (!addonInfo.python.empty())
pythonExe = cmdFileName(addonInfo.python);
else if (!defaultPythonExe.empty())
pythonExe = cmdFileName(defaultPythonExe);
else {
// store in static variable so we only look this up once
static const std::string detectedPythonExe = detectPython(executeCommand);
if (detectedPythonExe.empty())
throw InternalError(nullptr, "Failed to auto detect python");
pythonExe = detectedPythonExe;
}
std::string args;
if (addonInfo.executable.empty())
args = cmdFileName(addonInfo.runScript) + " " + cmdFileName(addonInfo.scriptFile);
args += std::string(args.empty() ? "" : " ") + "--cli" + addonInfo.args;
if (!premiumArgs.empty() && !addonInfo.executable.empty())
args += " " + premiumArgs;
const bool is_file_list = (file.find(FILELIST) != std::string::npos);
const std::string fileArg = (is_file_list ? " --file-list " : " ") + cmdFileName(file);
args += fileArg;
std::string result;
if (const int exitcode = executeCommand(pythonExe, split(args), redirect, result)) {
std::string message("Failed to execute addon '" + addonInfo.name + "' - exitcode is " + std::to_string(exitcode));
std::string details = pythonExe + " " + args;
if (result.size() > 2) {
details += "\nOutput:\n";
details += result;
const auto pos = details.find_last_not_of("\n\r");
if (pos != std::string::npos)
details.resize(pos + 1);
}
throw InternalError(nullptr, message, details);
}
std::vector<picojson::value> addonResult;
// Validate output..
std::istringstream istr(result);
std::string line;
while (std::getline(istr, line)) {
// TODO: also bail out?
if (line.empty()) {
//std::cout << "addon '" << addonInfo.name << "' result contains empty line" << std::endl;
continue;
}
// TODO: get rid of this
if (startsWith(line,"Checking ")) {
//std::cout << "addon '" << addonInfo.name << "' result contains 'Checking ' line" << std::endl;
continue;
}
if (line[0] != '{') {
//std::cout << "addon '" << addonInfo.name << "' result is not a JSON" << std::endl;
result.erase(result.find_last_not_of('\n') + 1, std::string::npos); // Remove trailing newlines
throw InternalError(nullptr, "Failed to execute '" + pythonExe + " " + args + "'. " + result);
}
//std::cout << "addon '" << addonInfo.name << "' result is " << line << std::endl;
// TODO: make these failures?
picojson::value res;
const std::string err = picojson::parse(res, line);
if (!err.empty()) {
//std::cout << "addon '" << addonInfo.name << "' result is not a valid JSON (" << err << ")" << std::endl;
continue;
}
if (!res.is<picojson::object>()) {
//std::cout << "addon '" << addonInfo.name << "' result is not a JSON object" << std::endl;
continue;
}
addonResult.emplace_back(std::move(res));
}
// Valid results
return addonResult;
}
static std::string getDefinesFlags(const std::string &semicolonSeparatedString)
{
std::string flags;
for (const std::string &d: split(semicolonSeparatedString, ";"))
flags += "-D" + d + " ";
return flags;
}
CppCheck::CppCheck(ErrorLogger &errorLogger,
bool useGlobalSuppressions,
ExecuteCmdFn executeCommand)
: mErrorLogger(errorLogger)
, mUseGlobalSuppressions(useGlobalSuppressions)
, mExecuteCommand(std::move(executeCommand))
{}
CppCheck::~CppCheck()
{
while (!mFileInfo.empty()) {
delete mFileInfo.back();
mFileInfo.pop_back();
}
if (mPlistFile.is_open()) {
mPlistFile << ErrorLogger::plistFooter();
mPlistFile.close();
}
}
const char * CppCheck::version()
{
return Version;
}
const char * CppCheck::extraVersion()
{
return ExtraVersion;
}
static bool reportClangErrors(std::istream &is, const std::function<void(const ErrorMessage&)>& reportErr, std::vector<ErrorMessage> &warnings)
{
std::string line;
while (std::getline(is, line)) {
if (line.empty() || line[0] == ' ' || line[0] == '`' || line[0] == '-')
continue;
std::string::size_type pos3 = line.find(": error: ");
if (pos3 == std::string::npos)
pos3 = line.find(": fatal error:");
if (pos3 == std::string::npos)
pos3 = line.find(": warning:");
if (pos3 == std::string::npos)
continue;
// file:line:column: error: ....
const std::string::size_type pos2 = line.rfind(':', pos3 - 1);
const std::string::size_type pos1 = line.rfind(':', pos2 - 1);
if (pos1 >= pos2 || pos2 >= pos3)
continue;
const std::string filename = line.substr(0, pos1);
const std::string linenr = line.substr(pos1+1, pos2-pos1-1);
const std::string colnr = line.substr(pos2+1, pos3-pos2-1);
const std::string msg = line.substr(line.find(':', pos3+1) + 2);
const std::string locFile = Path::toNativeSeparators(filename);
ErrorMessage::FileLocation loc;
loc.setfile(locFile);
loc.line = strToInt<int>(linenr);
loc.column = strToInt<unsigned int>(colnr);
ErrorMessage errmsg({std::move(loc)},
locFile,
Severity::error,
msg,
"syntaxError",
Certainty::normal);
if (line.compare(pos3, 10, ": warning:") == 0) {
warnings.push_back(std::move(errmsg));
continue;
}
reportErr(errmsg);
return true;
}
return false;
}
unsigned int CppCheck::check(const std::string &path)
{
if (mSettings.clang) {
if (!mSettings.quiet)
mErrorLogger.reportOut(std::string("Checking ") + path + " ...", Color::FgGreen);
const std::string lang = Path::isCPP(path) ? "-x c++" : "-x c";
const std::string analyzerInfo = mSettings.buildDir.empty() ? std::string() : AnalyzerInformation::getAnalyzerInfoFile(mSettings.buildDir, path, emptyString);
const std::string clangcmd = analyzerInfo + ".clang-cmd";
const std::string clangStderr = analyzerInfo + ".clang-stderr";
const std::string clangAst = analyzerInfo + ".clang-ast";
std::string exe = mSettings.clangExecutable;
#ifdef _WIN32
// append .exe if it is not a path
if (Path::fromNativeSeparators(mSettings.clangExecutable).find('/') == std::string::npos) {
exe += ".exe";
}
#endif
std::string flags(lang + " ");
if (Path::isCPP(path) && !mSettings.standards.stdValue.empty())
flags += "-std=" + mSettings.standards.stdValue + " ";
for (const std::string &i: mSettings.includePaths)
flags += "-I" + i + " ";
flags += getDefinesFlags(mSettings.userDefines);
const std::string args2 = "-fsyntax-only -Xclang -ast-dump -fno-color-diagnostics " + flags + path;
const std::string redirect2 = analyzerInfo.empty() ? std::string("2>&1") : ("2> " + clangStderr);
if (!mSettings.buildDir.empty()) {
std::ofstream fout(clangcmd);
fout << exe << " " << args2 << " " << redirect2 << std::endl;
} else if (mSettings.verbose && !mSettings.quiet) {
mErrorLogger.reportOut(exe + " " + args2);
}
std::string output2;
if (mExecuteCommand(exe,split(args2),redirect2,output2) != EXIT_SUCCESS || output2.find("TranslationUnitDecl") == std::string::npos) {
std::cerr << "Failed to execute '" << exe << " " << args2 << " " << redirect2 << "'" << std::endl;
return 0;
}
// Ensure there are not syntax errors...
std::vector<ErrorMessage> compilerWarnings;
if (!mSettings.buildDir.empty()) {
std::ifstream fin(clangStderr);
auto reportError = [this](const ErrorMessage& errorMessage) {
reportErr(errorMessage);
};
if (reportClangErrors(fin, reportError, compilerWarnings))
return 0;
} else {
std::istringstream istr(output2);
auto reportError = [this](const ErrorMessage& errorMessage) {
reportErr(errorMessage);
};
if (reportClangErrors(istr, reportError, compilerWarnings))
return 0;
}
if (!mSettings.buildDir.empty()) {
std::ofstream fout(clangAst);
fout << output2 << std::endl;
}
try {
std::istringstream ast(output2);
Tokenizer tokenizer(&mSettings, this);
tokenizer.list.appendFileIfNew(path);
clangimport::parseClangAstDump(&tokenizer, ast);
ValueFlow::setValues(tokenizer.list,
const_cast<SymbolDatabase&>(*tokenizer.getSymbolDatabase()),
this,
&mSettings,
&s_timerResults);
if (mSettings.debugnormal)
tokenizer.printDebugOutput(1);
checkNormalTokens(tokenizer);
// create dumpfile
std::ofstream fdump;
std::string dumpFile;
createDumpFile(mSettings, path, fdump, dumpFile);
if (fdump.is_open()) {
fdump << "<dump cfg=\"\">\n";
for (const ErrorMessage& errmsg: compilerWarnings)
fdump << " <clang-warning file=\"" << toxml(errmsg.callStack.front().getfile()) << "\" line=\"" << errmsg.callStack.front().line << "\" column=\"" << errmsg.callStack.front().column << "\" message=\"" << toxml(errmsg.shortMessage()) << "\"/>\n";
fdump << " <standards>\n";
fdump << " <c version=\"" << mSettings.standards.getC() << "\"/>\n";
fdump << " <cpp version=\"" << mSettings.standards.getCPP() << "\"/>\n";
fdump << " </standards>\n";
tokenizer.dump(fdump);
fdump << "</dump>\n";
fdump << "</dumps>\n";
fdump.close();
}
// run addons
executeAddons(dumpFile, path);
} catch (const InternalError &e) {
const ErrorMessage errmsg = ErrorMessage::fromInternalError(e, nullptr, path, "Bailing out from analysis: Processing Clang AST dump failed");
reportErr(errmsg);
} catch (const TerminateException &) {
// Analysis is terminated
return mExitCode;
} catch (const std::exception &e) {
internalError(path, std::string("Processing Clang AST dump failed: ") + e.what());
}
return mExitCode;
}
return checkFile(Path::simplifyPath(path), emptyString);
}
unsigned int CppCheck::check(const std::string &path, const std::string &content)
{
std::istringstream iss(content);
return checkFile(Path::simplifyPath(path), emptyString, &iss);
}
unsigned int CppCheck::check(const FileSettings &fs)
{
CppCheck temp(mErrorLogger, mUseGlobalSuppressions, mExecuteCommand);
temp.mSettings = mSettings;
if (!temp.mSettings.userDefines.empty())
temp.mSettings.userDefines += ';';
if (mSettings.clang)
temp.mSettings.userDefines += fs.defines;
else
temp.mSettings.userDefines += fs.cppcheckDefines();
temp.mSettings.includePaths = fs.includePaths;
temp.mSettings.userUndefs.insert(fs.undefs.cbegin(), fs.undefs.cend());
if (fs.standard.find("++") != std::string::npos)
temp.mSettings.standards.setCPP(fs.standard);
else if (!fs.standard.empty())
temp.mSettings.standards.setC(fs.standard);
if (fs.platformType != Platform::Type::Unspecified)
temp.mSettings.platform.set(fs.platformType);
if (mSettings.clang) {
temp.mSettings.includePaths.insert(temp.mSettings.includePaths.end(), fs.systemIncludePaths.cbegin(), fs.systemIncludePaths.cend());
return temp.check(Path::simplifyPath(fs.filename));
}
const unsigned int returnValue = temp.checkFile(Path::simplifyPath(fs.filename), fs.cfg);
mSettings.nomsg.addSuppressions(temp.mSettings.nomsg.getSuppressions());
return returnValue;
}
static simplecpp::TokenList createTokenList(const std::string& filename, std::vector<std::string>& files, simplecpp::OutputList* outputList, std::istream* fileStream)
{
if (fileStream)
return {*fileStream, files, filename, outputList};
return {filename, files, outputList};
}
unsigned int CppCheck::checkFile(const std::string& filename, const std::string &cfgname, std::istream* fileStream)
{
mExitCode = 0;
FilesDeleter filesDeleter;
if (Settings::terminated())
return mExitCode;
const Timer fileTotalTimer(mSettings.showtime == SHOWTIME_MODES::SHOWTIME_FILE_TOTAL, filename);
if (!mSettings.quiet) {
std::string fixedpath = Path::simplifyPath(filename);
fixedpath = Path::toNativeSeparators(fixedpath);
mErrorLogger.reportOut(std::string("Checking ") + fixedpath + ' ' + cfgname + std::string("..."), Color::FgGreen);
if (mSettings.verbose) {
mErrorLogger.reportOut("Defines:" + mSettings.userDefines);
std::string undefs;
for (const std::string& U : mSettings.userUndefs) {
if (!undefs.empty())
undefs += ';';
undefs += ' ' + U;
}
mErrorLogger.reportOut("Undefines:" + undefs);
std::string includePaths;
for (const std::string &I : mSettings.includePaths)
includePaths += " -I" + I;
mErrorLogger.reportOut("Includes:" + includePaths);
mErrorLogger.reportOut(std::string("Platform:") + mSettings.platform.toString());
}
}
if (mPlistFile.is_open()) {
mPlistFile << ErrorLogger::plistFooter();
mPlistFile.close();
}
CheckUnusedFunctions checkUnusedFunctions(nullptr, nullptr, nullptr);
try {
Preprocessor preprocessor(mSettings, this);
std::set<std::string> configurations;
simplecpp::OutputList outputList;
std::vector<std::string> files;
simplecpp::TokenList tokens1 = createTokenList(filename, files, &outputList, fileStream);
// If there is a syntax error, report it and stop
const auto output_it = std::find_if(outputList.cbegin(), outputList.cend(), [](const simplecpp::Output &output){
return Preprocessor::hasErrors(output);
});
if (output_it != outputList.cend()) {
const simplecpp::Output &output = *output_it;
std::string file = Path::fromNativeSeparators(output.location.file());
if (mSettings.relativePaths)
file = Path::getRelativePath(file, mSettings.basePaths);
const ErrorMessage::FileLocation loc1(file, output.location.line, output.location.col);
std::list<ErrorMessage::FileLocation> callstack(1, loc1);
ErrorMessage errmsg(callstack,
"",
Severity::error,
output.msg,
"syntaxError",
Certainty::normal);
reportErr(errmsg);
return mExitCode;
}
if (mSettings.library.markupFile(filename)) {
Tokenizer tokenizer(&mSettings, this, &preprocessor);
tokenizer.createTokens(std::move(tokens1));
checkUnusedFunctions.getFileInfo(&tokenizer, &mSettings);
return EXIT_SUCCESS;
}
if (!preprocessor.loadFiles(tokens1, files))
return mExitCode;
if (!mSettings.plistOutput.empty()) {
std::string filename2;
if (filename.find('/') != std::string::npos)
filename2 = filename.substr(filename.rfind('/') + 1);
else
filename2 = filename;
const std::size_t fileNameHash = std::hash<std::string> {}(filename);
filename2 = mSettings.plistOutput + filename2.substr(0, filename2.find('.')) + "_" + std::to_string(fileNameHash) + ".plist";
mPlistFile.open(filename2);
mPlistFile << ErrorLogger::plistHeader(version(), files);
}
std::string dumpProlog;
if (mSettings.dump || !mSettings.addons.empty()) {
dumpProlog += " <rawtokens>\n";
for (unsigned int i = 0; i < files.size(); ++i) {
dumpProlog += " <file index=\"";
dumpProlog += std::to_string(i);
dumpProlog += "\" name=\"";
dumpProlog += ErrorLogger::toxml(files[i]);
dumpProlog += "\"/>\n";
}
for (const simplecpp::Token *tok = tokens1.cfront(); tok; tok = tok->next) {
dumpProlog += " <tok ";
dumpProlog += "fileIndex=\"";
dumpProlog += std::to_string(tok->location.fileIndex);
dumpProlog += "\" ";
dumpProlog += "linenr=\"";
dumpProlog += std::to_string(tok->location.line);
dumpProlog += "\" ";
dumpProlog +="column=\"";
dumpProlog += std::to_string(tok->location.col);
dumpProlog += "\" ";
dumpProlog += "str=\"";
dumpProlog += ErrorLogger::toxml(tok->str());
dumpProlog += "\"";
dumpProlog += "/>\n";
}
dumpProlog += " </rawtokens>\n";
}
// Parse comments and then remove them
preprocessor.inlineSuppressions(tokens1, mSettings.nomsg);
if (mSettings.dump || !mSettings.addons.empty()) {
std::ostringstream oss;
mSettings.nomsg.dump(oss);
dumpProlog += oss.str();
}
tokens1.removeComments();
preprocessor.removeComments();
if (!mSettings.buildDir.empty()) {
// Get toolinfo
std::ostringstream toolinfo;
toolinfo << CPPCHECK_VERSION_STRING;
toolinfo << (mSettings.severity.isEnabled(Severity::warning) ? 'w' : ' ');
toolinfo << (mSettings.severity.isEnabled(Severity::style) ? 's' : ' ');
toolinfo << (mSettings.severity.isEnabled(Severity::performance) ? 'p' : ' ');
toolinfo << (mSettings.severity.isEnabled(Severity::portability) ? 'p' : ' ');
toolinfo << (mSettings.severity.isEnabled(Severity::information) ? 'i' : ' ');
toolinfo << mSettings.userDefines;
mSettings.nomsg.dump(toolinfo);
// Calculate hash so it can be compared with old hash / future hashes
const std::size_t hash = preprocessor.calculateHash(tokens1, toolinfo.str());
std::list<ErrorMessage> errors;
if (!mAnalyzerInformation.analyzeFile(mSettings.buildDir, filename, cfgname, hash, errors)) {
while (!errors.empty()) {
reportErr(errors.front());
errors.pop_front();
}
return mExitCode; // known results => no need to reanalyze file
}
}
// write dump file xml prolog
std::ofstream fdump;
std::string dumpFile;
createDumpFile(mSettings, filename, fdump, dumpFile);
if (fdump.is_open()) {
fdump << dumpProlog;
if (!mSettings.dump)
filesDeleter.addFile(dumpFile);
}
// Get directives
preprocessor.setDirectives(tokens1);
preprocessor.simplifyPragmaAsm(&tokens1);
preprocessor.setPlatformInfo(&tokens1);
// Get configurations..
if ((mSettings.checkAllConfigurations && mSettings.userDefines.empty()) || mSettings.force) {
Timer t("Preprocessor::getConfigs", mSettings.showtime, &s_timerResults);
configurations = preprocessor.getConfigs(tokens1);
} else {
configurations.insert(mSettings.userDefines);
}
if (mSettings.checkConfiguration) {
for (const std::string &config : configurations)
(void)preprocessor.getcode(tokens1, config, files, true);
return 0;
}
#ifdef HAVE_RULES
// Run define rules on raw code
const auto rules_it = std::find_if(mSettings.rules.cbegin(), mSettings.rules.cend(), [](const Settings::Rule& rule) {
return rule.tokenlist == "define";
});
if (rules_it != mSettings.rules.cend()) {
std::string code;
const std::list<Directive> &directives = preprocessor.getDirectives();
for (const Directive &dir : directives) {
if (startsWith(dir.str,"#define ") || startsWith(dir.str,"#include "))
code += "#line " + std::to_string(dir.linenr) + " \"" + dir.file + "\"\n" + dir.str + '\n';
}
Tokenizer tokenizer2(&mSettings, this);
std::istringstream istr2(code);
tokenizer2.list.createTokens(istr2);
executeRules("define", tokenizer2);
}
#endif
if (!mSettings.force && configurations.size() > mSettings.maxConfigs) {
if (mSettings.severity.isEnabled(Severity::information)) {
tooManyConfigsError(Path::toNativeSeparators(filename),configurations.size());
} else {
mTooManyConfigs = true;
}
}
std::set<unsigned long long> hashes;
int checkCount = 0;
bool hasValidConfig = false;
std::list<std::string> configurationError;
for (const std::string &currCfg : configurations) {
// bail out if terminated
if (Settings::terminated())
break;
// Check only a few configurations (default 12), after that bail out, unless --force
// was used.
if (!mSettings.force && ++checkCount > mSettings.maxConfigs)
break;
if (!mSettings.userDefines.empty()) {
mCurrentConfig = mSettings.userDefines;
const std::vector<std::string> v1(split(mSettings.userDefines, ";"));
for (const std::string &cfg: split(currCfg, ";")) {
if (std::find(v1.cbegin(), v1.cend(), cfg) == v1.cend()) {
mCurrentConfig += ";" + cfg;
}
}
} else {
mCurrentConfig = currCfg;
}
if (mSettings.preprocessOnly) {
Timer t("Preprocessor::getcode", mSettings.showtime, &s_timerResults);
std::string codeWithoutCfg = preprocessor.getcode(tokens1, mCurrentConfig, files, true);
t.stop();
if (startsWith(codeWithoutCfg,"#file"))
codeWithoutCfg.insert(0U, "//");
std::string::size_type pos = 0;
while ((pos = codeWithoutCfg.find("\n#file",pos)) != std::string::npos)
codeWithoutCfg.insert(pos+1U, "//");
pos = 0;
while ((pos = codeWithoutCfg.find("\n#endfile",pos)) != std::string::npos)
codeWithoutCfg.insert(pos+1U, "//");
pos = 0;
while ((pos = codeWithoutCfg.find(Preprocessor::macroChar,pos)) != std::string::npos)
codeWithoutCfg[pos] = ' ';
reportOut(codeWithoutCfg);
continue;
}
Tokenizer tokenizer(&mSettings, this, &preprocessor);
if (mSettings.showtime != SHOWTIME_MODES::SHOWTIME_NONE)
tokenizer.setTimerResults(&s_timerResults);
try {
// Create tokens, skip rest of iteration if failed
{
Timer timer("Tokenizer::createTokens", mSettings.showtime, &s_timerResults);
simplecpp::TokenList tokensP = preprocessor.preprocess(tokens1, mCurrentConfig, files, true);
tokenizer.createTokens(std::move(tokensP));
}
hasValidConfig = true;
// locations macros
mLocationMacros.clear();
for (const Token* tok = tokenizer.tokens(); tok; tok = tok->next()) {
if (!tok->getMacroName().empty())
mLocationMacros[Location(files[tok->fileIndex()], tok->linenr())].emplace(tok->getMacroName());
}
// If only errors are printed, print filename after the check
if (!mSettings.quiet && (!mCurrentConfig.empty() || checkCount > 1)) {
std::string fixedpath = Path::simplifyPath(filename);
fixedpath = Path::toNativeSeparators(fixedpath);
mErrorLogger.reportOut("Checking " + fixedpath + ": " + mCurrentConfig + "...", Color::FgGreen);
}
if (!tokenizer.tokens())
continue;
// skip rest of iteration if just checking configuration
if (mSettings.checkConfiguration)
continue;
// Check raw tokens
checkRawTokens(tokenizer);
// Simplify tokens into normal form, skip rest of iteration if failed
if (!tokenizer.simplifyTokens1(mCurrentConfig))
continue;
// dump xml if --dump
if ((mSettings.dump || !mSettings.addons.empty()) && fdump.is_open()) {
fdump << "<dump cfg=\"" << ErrorLogger::toxml(mCurrentConfig) << "\">" << std::endl;
fdump << " <standards>" << std::endl;
fdump << " <c version=\"" << mSettings.standards.getC() << "\"/>" << std::endl;
fdump << " <cpp version=\"" << mSettings.standards.getCPP() << "\"/>" << std::endl;
fdump << " </standards>" << std::endl;
preprocessor.dump(fdump);
tokenizer.dump(fdump);
fdump << "</dump>" << std::endl;
}
// Need to call this even if the hash will skip this configuration
mSettings.nomsg.markUnmatchedInlineSuppressionsAsChecked(tokenizer);
// Skip if we already met the same simplified token list
if (mSettings.force || mSettings.maxConfigs > 1) {
const std::size_t hash = tokenizer.list.calculateHash();
if (hashes.find(hash) != hashes.end()) {
if (mSettings.debugwarnings)
purgedConfigurationMessage(filename, mCurrentConfig);
continue;
}
hashes.insert(hash);
}
// Check normal tokens
checkNormalTokens(tokenizer);
// Analyze info..
if (!mSettings.buildDir.empty())
checkUnusedFunctions.parseTokens(tokenizer, filename.c_str(), &mSettings);
#ifdef HAVE_RULES
// handling of "simple" rules has been removed.
if (hasRule("simple"))
throw InternalError(nullptr, "Handling of \"simple\" rules has been removed in Cppcheck. Use --addon instead.");
#endif
} catch (const simplecpp::Output &o) {
// #error etc during preprocessing
configurationError.push_back((mCurrentConfig.empty() ? "\'\'" : mCurrentConfig) + " : [" + o.location.file() + ':' + std::to_string(o.location.line) + "] " + o.msg);
--checkCount; // don't count invalid configurations
if (!hasValidConfig && currCfg == *configurations.rbegin()) {
// If there is no valid configuration then report error..
std::string file = Path::fromNativeSeparators(o.location.file());
if (mSettings.relativePaths)
file = Path::getRelativePath(file, mSettings.basePaths);
const ErrorMessage::FileLocation loc1(file, o.location.line, o.location.col);
std::list<ErrorMessage::FileLocation> callstack(1, loc1);
ErrorMessage errmsg(callstack,
filename,
Severity::error,
o.msg,
"preprocessorErrorDirective",
Certainty::normal);
reportErr(errmsg);
}
continue;
} catch (const TerminateException &) {
// Analysis is terminated
return mExitCode;
} catch (const InternalError &e) {
ErrorMessage errmsg = ErrorMessage::fromInternalError(e, &tokenizer.list, filename);
reportErr(errmsg);
}
}
if (!hasValidConfig && configurations.size() > 1 && mSettings.severity.isEnabled(Severity::information)) {
std::string msg;
msg = "This file is not analyzed. Cppcheck failed to extract a valid configuration. Use -v for more details.";
msg += "\nThis file is not analyzed. Cppcheck failed to extract a valid configuration. The tested configurations have these preprocessor errors:";
for (const std::string &s : configurationError)
msg += '\n' + s;
const std::string locFile = Path::toNativeSeparators(filename);
ErrorMessage::FileLocation loc;
loc.setfile(locFile);
ErrorMessage errmsg({std::move(loc)},
locFile,
Severity::information,
msg,
"noValidConfiguration",
Certainty::normal);
reportErr(errmsg);
}
// dumped all configs, close root </dumps> element now
if (fdump.is_open()) {
fdump << "</dumps>" << std::endl;
fdump.close();
}
executeAddons(dumpFile, Path::simplifyPath(filename));
} catch (const TerminateException &) {
// Analysis is terminated
return mExitCode;
} catch (const std::runtime_error &e) {
internalError(filename, std::string("Checking file failed: ") + e.what());
} catch (const std::bad_alloc &) {
internalError(filename, "Checking file failed: out of memory");
} catch (const InternalError &e) {
const ErrorMessage errmsg = ErrorMessage::fromInternalError(e, nullptr, filename, "Bailing out from analysis: Checking file failed");
reportErr(errmsg);
}
if (!mSettings.buildDir.empty()) {
mAnalyzerInformation.setFileInfo("CheckUnusedFunctions", checkUnusedFunctions.analyzerInfo());
mAnalyzerInformation.close();
}
// In jointSuppressionReport mode, unmatched suppressions are
// collected after all files are processed
if (!mSettings.useSingleJob() && (mSettings.severity.isEnabled(Severity::information) || mSettings.checkConfiguration)) {
Suppressions::reportUnmatchedSuppressions(mSettings.nomsg.getUnmatchedLocalSuppressions(filename, isUnusedFunctionCheckEnabled()), *this);
}
mErrorList.clear();
if (mSettings.showtime == SHOWTIME_MODES::SHOWTIME_FILE || mSettings.showtime == SHOWTIME_MODES::SHOWTIME_TOP5_FILE)
printTimerResults(mSettings.showtime);
return mExitCode;
}
// TODO: replace with ErrorMessage::fromInternalError()
void CppCheck::internalError(const std::string &filename, const std::string &msg)
{
const std::string fullmsg("Bailing out from analysis: " + msg);
const ErrorMessage::FileLocation loc1(filename, 0, 0);
std::list<ErrorMessage::FileLocation> callstack(1, loc1);
ErrorMessage errmsg(callstack,
emptyString,
Severity::error,
fullmsg,
"internalError",
Certainty::normal);
mErrorLogger.reportErr(errmsg);
}
//---------------------------------------------------------------------------
// CppCheck - A function that checks a raw token list
//---------------------------------------------------------------------------
void CppCheck::checkRawTokens(const Tokenizer &tokenizer)
{
#ifdef HAVE_RULES
// Execute rules for "raw" code
executeRules("raw", tokenizer);
#else
(void)tokenizer;
#endif
}
//---------------------------------------------------------------------------
// CppCheck - A function that checks a normal token list
//---------------------------------------------------------------------------
void CppCheck::checkNormalTokens(const Tokenizer &tokenizer)
{
// TODO: this should actually be the behavior if only "--enable=unusedFunction" is specified - see #10648
const char* unusedFunctionOnly = std::getenv("UNUSEDFUNCTION_ONLY");
const bool doUnusedFunctionOnly = unusedFunctionOnly && (std::strcmp(unusedFunctionOnly, "1") == 0);
const std::time_t maxTime = mSettings.checksMaxTime > 0 ? std::time(nullptr) + mSettings.checksMaxTime : 0;
// call all "runChecks" in all registered Check classes
// cppcheck-suppress shadowFunction - TODO: fix this
for (Check *check : Check::instances()) {
if (Settings::terminated())
return;
if (maxTime > 0 && std::time(nullptr) > maxTime) {
if (mSettings.debugwarnings) {
ErrorMessage::FileLocation loc;
loc.setfile(tokenizer.list.getFiles()[0]);
ErrorMessage errmsg({std::move(loc)},
emptyString,
Severity::debug,
"Checks maximum time exceeded",
"checksMaxTime",
Certainty::normal);
reportErr(errmsg);
}
return;
}
if (doUnusedFunctionOnly && dynamic_cast<CheckUnusedFunctions*>(check) == nullptr)
continue;
Timer timerRunChecks(check->name() + "::runChecks", mSettings.showtime, &s_timerResults);
check->runChecks(tokenizer, this);
}
if (mSettings.clang)
// TODO: Use CTU for Clang analysis
return;
if (mSettings.useSingleJob() || !mSettings.buildDir.empty()) {
// Analyse the tokens..
if (CTU::FileInfo * const fi1 = CTU::getFileInfo(&tokenizer)) {
if (!mSettings.buildDir.empty())
mAnalyzerInformation.setFileInfo("ctu", fi1->toString());
if (mSettings.useSingleJob())
mFileInfo.push_back(fi1);
else
delete fi1;
}
// cppcheck-suppress shadowFunction - TODO: fix this
for (const Check *check : Check::instances()) {
if (doUnusedFunctionOnly && dynamic_cast<const CheckUnusedFunctions*>(check) == nullptr)
continue;
if (Check::FileInfo * const fi = check->getFileInfo(&tokenizer, &mSettings)) {
if (!mSettings.buildDir.empty())
mAnalyzerInformation.setFileInfo(check->name(), fi->toString());
if (mSettings.useSingleJob())
mFileInfo.push_back(fi);
else
delete fi;
}
}
}
#ifdef HAVE_RULES
executeRules("normal", tokenizer);
#endif
}
//---------------------------------------------------------------------------
#ifdef HAVE_RULES
bool CppCheck::hasRule(const std::string &tokenlist) const
{
return std::any_of(mSettings.rules.cbegin(), mSettings.rules.cend(), [&](const Settings::Rule& rule) {
return rule.tokenlist == tokenlist;
});
}
static const char * pcreErrorCodeToString(const int pcreExecRet)
{
switch (pcreExecRet) {
case PCRE_ERROR_NULL:
return "Either code or subject was passed as NULL, or ovector was NULL "
"and ovecsize was not zero (PCRE_ERROR_NULL)";
case PCRE_ERROR_BADOPTION:
return "An unrecognized bit was set in the options argument (PCRE_ERROR_BADOPTION)";
case PCRE_ERROR_BADMAGIC:
return "PCRE stores a 4-byte \"magic number\" at the start of the compiled code, "
"to catch the case when it is passed a junk pointer and to detect when a "
"pattern that was compiled in an environment of one endianness is run in "
"an environment with the other endianness. This is the error that PCRE "
"gives when the magic number is not present (PCRE_ERROR_BADMAGIC)";
case PCRE_ERROR_UNKNOWN_NODE:
return "While running the pattern match, an unknown item was encountered in the "
"compiled pattern. This error could be caused by a bug in PCRE or by "
"overwriting of the compiled pattern (PCRE_ERROR_UNKNOWN_NODE)";
case PCRE_ERROR_NOMEMORY:
return "If a pattern contains back references, but the ovector that is passed "
"to pcre_exec() is not big enough to remember the referenced substrings, "
"PCRE gets a block of memory at the start of matching to use for this purpose. "
"If the call via pcre_malloc() fails, this error is given. The memory is "
"automatically freed at the end of matching. This error is also given if "
"pcre_stack_malloc() fails in pcre_exec(). "
"This can happen only when PCRE has been compiled with "
"--disable-stack-for-recursion (PCRE_ERROR_NOMEMORY)";
case PCRE_ERROR_NOSUBSTRING:
return "This error is used by the pcre_copy_substring(), pcre_get_substring(), "
"and pcre_get_substring_list() functions (see below). "
"It is never returned by pcre_exec() (PCRE_ERROR_NOSUBSTRING)";
case PCRE_ERROR_MATCHLIMIT:
return "The backtracking limit, as specified by the match_limit field in a pcre_extra "
"structure (or defaulted) was reached. "
"See the description above (PCRE_ERROR_MATCHLIMIT)";
case PCRE_ERROR_CALLOUT:
return "This error is never generated by pcre_exec() itself. "
"It is provided for use by callout functions that want to yield a distinctive "
"error code. See the pcrecallout documentation for details (PCRE_ERROR_CALLOUT)";
case PCRE_ERROR_BADUTF8:
return "A string that contains an invalid UTF-8 byte sequence was passed as a subject, "
"and the PCRE_NO_UTF8_CHECK option was not set. If the size of the output vector "
"(ovecsize) is at least 2, the byte offset to the start of the the invalid UTF-8 "
"character is placed in the first element, and a reason code is placed in the "
"second element. The reason codes are listed in the following section. For "
"backward compatibility, if PCRE_PARTIAL_HARD is set and the problem is a truncated "
"UTF-8 character at the end of the subject (reason codes 1 to 5), "
"PCRE_ERROR_SHORTUTF8 is returned instead of PCRE_ERROR_BADUTF8";
case PCRE_ERROR_BADUTF8_OFFSET:
return "The UTF-8 byte sequence that was passed as a subject was checked and found to "
"be valid (the PCRE_NO_UTF8_CHECK option was not set), but the value of "
"startoffset did not point to the beginning of a UTF-8 character or the end of "
"the subject (PCRE_ERROR_BADUTF8_OFFSET)";
case PCRE_ERROR_PARTIAL:
return "The subject string did not match, but it did match partially. See the "
"pcrepartial documentation for details of partial matching (PCRE_ERROR_PARTIAL)";
case PCRE_ERROR_BADPARTIAL:
return "This code is no longer in use. It was formerly returned when the PCRE_PARTIAL "
"option was used with a compiled pattern containing items that were not supported "
"for partial matching. From release 8.00 onwards, there are no restrictions on "
"partial matching (PCRE_ERROR_BADPARTIAL)";
case PCRE_ERROR_INTERNAL:
return "An unexpected internal error has occurred. This error could be caused by a bug "
"in PCRE or by overwriting of the compiled pattern (PCRE_ERROR_INTERNAL)";
case PCRE_ERROR_BADCOUNT:
return "This error is given if the value of the ovecsize argument is negative "
"(PCRE_ERROR_BADCOUNT)";
case PCRE_ERROR_RECURSIONLIMIT:
return "The internal recursion limit, as specified by the match_limit_recursion "
"field in a pcre_extra structure (or defaulted) was reached. "
"See the description above (PCRE_ERROR_RECURSIONLIMIT)";
case PCRE_ERROR_DFA_UITEM:
return "PCRE_ERROR_DFA_UITEM";
case PCRE_ERROR_DFA_UCOND:
return "PCRE_ERROR_DFA_UCOND";
case PCRE_ERROR_DFA_WSSIZE:
return "PCRE_ERROR_DFA_WSSIZE";
case PCRE_ERROR_DFA_RECURSE:
return "PCRE_ERROR_DFA_RECURSE";
case PCRE_ERROR_NULLWSLIMIT:
return "PCRE_ERROR_NULLWSLIMIT";
case PCRE_ERROR_BADNEWLINE:
return "An invalid combination of PCRE_NEWLINE_xxx options was "
"given (PCRE_ERROR_BADNEWLINE)";
case PCRE_ERROR_BADOFFSET:
return "The value of startoffset was negative or greater than the length "
"of the subject, that is, the value in length (PCRE_ERROR_BADOFFSET)";
case PCRE_ERROR_SHORTUTF8:
return "This error is returned instead of PCRE_ERROR_BADUTF8 when the subject "
"string ends with a truncated UTF-8 character and the PCRE_PARTIAL_HARD option is set. "
"Information about the failure is returned as for PCRE_ERROR_BADUTF8. "
"It is in fact sufficient to detect this case, but this special error code for "
"PCRE_PARTIAL_HARD precedes the implementation of returned information; "
"it is retained for backwards compatibility (PCRE_ERROR_SHORTUTF8)";
case PCRE_ERROR_RECURSELOOP:
return "This error is returned when pcre_exec() detects a recursion loop "
"within the pattern. Specifically, it means that either the whole pattern "
"or a subpattern has been called recursively for the second time at the same "
"position in the subject string. Some simple patterns that might do this "
"are detected and faulted at compile time, but more complicated cases, "
"in particular mutual recursions between two different subpatterns, "
"cannot be detected until run time (PCRE_ERROR_RECURSELOOP)";
case PCRE_ERROR_JIT_STACKLIMIT:
return "This error is returned when a pattern that was successfully studied "
"using a JIT compile option is being matched, but the memory available "
"for the just-in-time processing stack is not large enough. See the pcrejit "
"documentation for more details (PCRE_ERROR_JIT_STACKLIMIT)";
case PCRE_ERROR_BADMODE:
return "This error is given if a pattern that was compiled by the 8-bit library "
"is passed to a 16-bit or 32-bit library function, or vice versa (PCRE_ERROR_BADMODE)";
case PCRE_ERROR_BADENDIANNESS:
return "This error is given if a pattern that was compiled and saved is reloaded on a "
"host with different endianness. The utility function pcre_pattern_to_host_byte_order() "
"can be used to convert such a pattern so that it runs on the new host (PCRE_ERROR_BADENDIANNESS)";
case PCRE_ERROR_DFA_BADRESTART:
return "PCRE_ERROR_DFA_BADRESTART";
#if PCRE_MAJOR >= 8 && PCRE_MINOR >= 32
case PCRE_ERROR_BADLENGTH:
return "This error is given if pcre_exec() is called with a negative value for the length argument (PCRE_ERROR_BADLENGTH)";
case PCRE_ERROR_JIT_BADOPTION:
return "This error is returned when a pattern that was successfully studied using a JIT compile "
"option is being matched, but the matching mode (partial or complete match) does not correspond "
"to any JIT compilation mode. When the JIT fast path function is used, this error may be "
"also given for invalid options. See the pcrejit documentation for more details (PCRE_ERROR_JIT_BADOPTION)";
#endif
}
return "";
}
void CppCheck::executeRules(const std::string &tokenlist, const Tokenizer &tokenizer)
{
// There is no rule to execute
if (!hasRule(tokenlist))
return;
// Write all tokens in a string that can be parsed by pcre
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
const std::string str(ostr.str());
for (const Settings::Rule &rule : mSettings.rules) {
if (rule.pattern.empty() || rule.id.empty() || rule.severity == Severity::none || rule.tokenlist != tokenlist)
continue;
if (!mSettings.quiet) {
reportOut("Processing rule: " + rule.pattern, Color::FgGreen);
}
const char *pcreCompileErrorStr = nullptr;
int erroffset = 0;
pcre * const re = pcre_compile(rule.pattern.c_str(),0,&pcreCompileErrorStr,&erroffset,nullptr);
if (!re) {
if (pcreCompileErrorStr) {
const std::string msg = "pcre_compile failed: " + std::string(pcreCompileErrorStr);
const ErrorMessage errmsg(std::list<ErrorMessage::FileLocation>(),
emptyString,
Severity::error,
msg,
"pcre_compile",
Certainty::normal);
reportErr(errmsg);
}
continue;
}
// Optimize the regex, but only if PCRE_CONFIG_JIT is available
#ifdef PCRE_CONFIG_JIT
const char *pcreStudyErrorStr = nullptr;
pcre_extra * const pcreExtra = pcre_study(re, PCRE_STUDY_JIT_COMPILE, &pcreStudyErrorStr);
// pcre_study() returns NULL for both errors and when it can not optimize the regex.
// The last argument is how one checks for errors.
// It is NULL if everything works, and points to an error string otherwise.
if (pcreStudyErrorStr) {
const std::string msg = "pcre_study failed: " + std::string(pcreStudyErrorStr);
const ErrorMessage errmsg(std::list<ErrorMessage::FileLocation>(),
emptyString,
Severity::error,
msg,
"pcre_study",
Certainty::normal);
reportErr(errmsg);
// pcre_compile() worked, but pcre_study() returned an error. Free the resources allocated by pcre_compile().
pcre_free(re);
continue;
}
#else
const pcre_extra * const pcreExtra = nullptr;
#endif
int pos = 0;
int ovector[30]= {0};
while (pos < (int)str.size()) {
const int pcreExecRet = pcre_exec(re, pcreExtra, str.c_str(), (int)str.size(), pos, 0, ovector, 30);
if (pcreExecRet < 0) {
const std::string errorMessage = pcreErrorCodeToString(pcreExecRet);
if (!errorMessage.empty()) {
const ErrorMessage errmsg(std::list<ErrorMessage::FileLocation>(),
emptyString,
Severity::error,
std::string("pcre_exec failed: ") + errorMessage,
"pcre_exec",
Certainty::normal);
reportErr(errmsg);
}
break;
}
const unsigned int pos1 = (unsigned int)ovector[0];
const unsigned int pos2 = (unsigned int)ovector[1];
// jump to the end of the match for the next pcre_exec
pos = (int)pos2;
// determine location..
ErrorMessage::FileLocation loc;
loc.setfile(tokenizer.list.getSourceFilePath());
loc.line = 0;
std::size_t len = 0;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next()) {
len = len + 1U + tok->str().size();
if (len > pos1) {
loc.setfile(tokenizer.list.getFiles().at(tok->fileIndex()));
loc.line = tok->linenr();
break;
}
}
const std::list<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 ErrorMessage errmsg(callStack, tokenizer.list.getSourceFilePath(), rule.severity, summary, rule.id, Certainty::normal);
// Report error
reportErr(errmsg);
}
pcre_free(re);
#ifdef PCRE_CONFIG_JIT
// Free up the EXTRA PCRE value (may be NULL at this point)
if (pcreExtra) {
pcre_free_study(pcreExtra);
}
#endif
}
}
#endif
void CppCheck::executeAddons(const std::string& dumpFile, const std::string& file0)
{
if (!dumpFile.empty()) {
std::vector<std::string> f{dumpFile};
executeAddons(f, file0);
}
}
void CppCheck::executeAddons(const std::vector<std::string>& files, const std::string& file0)
{
if (mSettings.addons.empty() || files.empty())
return;
FilesDeleter filesDeleter;
std::string fileList;
if (files.size() >= 2 || endsWith(files[0], ".ctu-info")) {
fileList = Path::getPathFromFilename(files[0]) + FILELIST + std::to_string(getPid());
filesDeleter.addFile(fileList);
std::ofstream fout(fileList);
for (const std::string& f: files)
fout << f << std::endl;
}
// ensure all addons have already been resolved - TODO: remove when settings are const after creation
assert(mSettings.addonInfos.size() == mSettings.addons.size());
for (const AddonInfo &addonInfo : mSettings.addonInfos) {
if (addonInfo.name != "misra" && !addonInfo.ctu && endsWith(files.back(), ".ctu-info"))
continue;
const std::vector<picojson::value> results =
executeAddon(addonInfo, mSettings.addonPython, fileList.empty() ? files[0] : fileList, mSettings.premiumArgs, mExecuteCommand);
const bool misraC2023 = mSettings.premiumArgs.find("--misra-c-2023") != std::string::npos;
for (const picojson::value& res : results) {
// TODO: get rid of copy?
// this is a copy so we can access missing fields and get a default value
picojson::object obj = res.get<picojson::object>();
ErrorMessage errmsg;
if (obj.count("file") > 0) {
std::string fileName = obj["file"].get<std::string>();
const int64_t lineNumber = obj["linenr"].get<int64_t>();
const int64_t column = obj["column"].get<int64_t>();
errmsg.callStack.emplace_back(std::move(fileName), lineNumber, column);
} else if (obj.count("loc") > 0) {
for (const picojson::value &locvalue: obj["loc"].get<picojson::array>()) {
picojson::object loc = locvalue.get<picojson::object>();
std::string fileName = loc["file"].get<std::string>();
const int64_t lineNumber = loc["linenr"].get<int64_t>();
const int64_t column = loc["column"].get<int64_t>();
const std::string info = loc["info"].get<std::string>();
errmsg.callStack.emplace_back(std::move(fileName), info, lineNumber, column);
}
}
errmsg.id = obj["addon"].get<std::string>() + "-" + obj["errorId"].get<std::string>();
if (misraC2023 && startsWith(errmsg.id, "misra-c2012-"))
errmsg.id = "misra-c2023-" + errmsg.id.substr(12);
const std::string text = obj["message"].get<std::string>();
errmsg.setmsg(text);
const std::string severity = obj["severity"].get<std::string>();
errmsg.severity = severityFromString(severity);
if (errmsg.severity == Severity::none) {
if (!endsWith(errmsg.id, "-logChecker"))
continue;
}
else if (!mSettings.severity.isEnabled(errmsg.severity))
continue;
errmsg.file0 = file0;
reportErr(errmsg);
}
}
}
void CppCheck::executeAddonsWholeProgram(const std::list<std::pair<std::string, std::size_t>> &files)
{
if (mSettings.addons.empty())
return;
std::vector<std::string> ctuInfoFiles;
for (const auto &f: files) {
const std::string &dumpFileName = getDumpFileName(mSettings, f.first);
ctuInfoFiles.push_back(getCtuInfoFileName(dumpFileName));
}
try {
executeAddons(ctuInfoFiles, "");
} catch (const InternalError& e) {
const ErrorMessage errmsg = ErrorMessage::fromInternalError(e, nullptr, "", "Bailing out from analysis: Whole program analysis failed");
reportErr(errmsg);
}
if (mSettings.buildDir.empty()) {
for (const std::string &f: ctuInfoFiles)
std::remove(f.c_str());
}
}
Settings &CppCheck::settings()
{
return mSettings;
}
void CppCheck::tooManyConfigsError(const std::string &file, const int numberOfConfigurations)
{
if (!mSettings.severity.isEnabled(Severity::information) && !mTooManyConfigs)
return;
mTooManyConfigs = false;
if (mSettings.severity.isEnabled(Severity::information) && file.empty())
return;
std::list<ErrorMessage::FileLocation> loclist;
if (!file.empty()) {
loclist.emplace_back(file);
}
std::ostringstream msg;
msg << "Too many #ifdef configurations - cppcheck only checks " << mSettings.maxConfigs;
if (numberOfConfigurations > mSettings.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.";
ErrorMessage errmsg(loclist,
emptyString,
Severity::information,
msg.str(),
"toomanyconfigs", CWE398,
Certainty::normal);
reportErr(errmsg);
}
void CppCheck::purgedConfigurationMessage(const std::string &file, const std::string& configuration)
{
mTooManyConfigs = false;
if (mSettings.severity.isEnabled(Severity::information) && file.empty())
return;
std::list<ErrorMessage::FileLocation> loclist;
if (!file.empty()) {
loclist.emplace_back(file);
}
ErrorMessage errmsg(loclist,
emptyString,
Severity::information,
"The configuration '" + configuration + "' was not checked because its code equals another one.",
"purgedConfiguration",
Certainty::normal);
reportErr(errmsg);
}
//---------------------------------------------------------------------------
void CppCheck::reportErr(const ErrorMessage &msg)
{
if (msg.severity == Severity::none && (msg.id == "logChecker" || endsWith(msg.id, "-logChecker"))) {
mErrorLogger.reportErr(msg);
return;
}
if (!mSettings.library.reportErrors(msg.file0))
return;
const std::string errmsg = msg.toString(mSettings.verbose);
if (errmsg.empty())
return;
// Alert only about unique errors
if (std::find(mErrorList.cbegin(), mErrorList.cend(), errmsg) != mErrorList.cend())
return;
if (!mSettings.buildDir.empty())
mAnalyzerInformation.reportErr(msg);
std::set<std::string> macroNames;
if (!msg.callStack.empty()) {
const std::string &file = msg.callStack.back().getfile(false);
int lineNumber = msg.callStack.back().line;
const auto it = mLocationMacros.find(Location(file, lineNumber));
if (it != mLocationMacros.cend())
macroNames = it->second;
}
// TODO: only convert if necessary
const auto errorMessage = Suppressions::ErrorMessage::fromErrorMessage(msg, macroNames);
if (mSettings.nomsg.isSuppressed(errorMessage, mUseGlobalSuppressions)) {
if (ErrorLogger::isCriticalErrorId(msg.id)) {
mExitCode = 1;
if (mSettings.nomsg.isSuppressedExplicitly(errorMessage, mUseGlobalSuppressions)) {
ErrorMessage temp;
temp.severity = Severity::none;
temp.id = msg.id;
mErrorLogger.reportErr(temp);
} else {
// Report critical error that is not explicitly suppressed
mErrorLogger.reportErr(msg);
}
}
return;
}
if (!mSettings.nofail.isSuppressed(errorMessage) && !mSettings.nomsg.isSuppressed(errorMessage)) {
mExitCode = 1;
}
mErrorList.push_back(errmsg);
mErrorLogger.reportErr(msg);
// check if plistOutput should be populated and the current output file is open and the error is not suppressed
if (!mSettings.plistOutput.empty() && mPlistFile.is_open() && !mSettings.nomsg.isSuppressed(errorMessage)) {
// add error to plist output file
mPlistFile << ErrorLogger::plistData(msg);
}
}
void CppCheck::reportOut(const std::string &outmsg, Color c)
{
mErrorLogger.reportOut(outmsg, c);
}
void CppCheck::reportProgress(const std::string &filename, const char stage[], const std::size_t value)
{
mErrorLogger.reportProgress(filename, stage, value);
}
void CppCheck::getErrorMessages(ErrorLogger &errorlogger)
{
Settings s;
s.severity.enable(Severity::warning);
s.severity.enable(Severity::style);
s.severity.enable(Severity::portability);
s.severity.enable(Severity::performance);
s.severity.enable(Severity::information);
CppCheck cppcheck(errorlogger, true, nullptr);
cppcheck.purgedConfigurationMessage(emptyString,emptyString);
cppcheck.mTooManyConfigs = true;
cppcheck.tooManyConfigsError(emptyString,0U);
// TODO: add functions to get remaining error messages
// call all "getErrorMessages" in all registered Check classes
for (std::list<Check *>::const_iterator it = Check::instances().cbegin(); it != Check::instances().cend(); ++it)
(*it)->getErrorMessages(&errorlogger, &s);
Preprocessor::getErrorMessages(&errorlogger, &s);
}
void CppCheck::analyseClangTidy(const FileSettings &fileSettings)
{
std::string allIncludes;
for (const std::string &inc : fileSettings.includePaths) {
allIncludes = allIncludes + "-I\"" + inc + "\" ";
}
const std::string allDefines = getDefinesFlags(fileSettings.defines);
#ifdef _WIN32
constexpr char exe[] = "clang-tidy.exe";
#else
constexpr char exe[] = "clang-tidy";
#endif
const std::string args = "-quiet -checks=*,-clang-analyzer-*,-llvm* \"" + fileSettings.filename + "\" -- " + allIncludes + allDefines;
std::string output;
if (const int exitcode = mExecuteCommand(exe, split(args), emptyString, output)) {
std::cerr << "Failed to execute '" << exe << "' (exitcode: " << std::to_string(exitcode) << ")" << std::endl;
return;
}
// parse output and create error messages
std::istringstream istr(output);
std::string line;
if (!mSettings.buildDir.empty()) {
const std::string analyzerInfoFile = AnalyzerInformation::getAnalyzerInfoFile(mSettings.buildDir, fileSettings.filename, emptyString);
std::ofstream fcmd(analyzerInfoFile + ".clang-tidy-cmd");
fcmd << istr.str();
}
while (std::getline(istr, line)) {
if (line.find("error") == std::string::npos && line.find("warning") == std::string::npos)
continue;
std::size_t endColumnPos = line.find(": error:");
if (endColumnPos == std::string::npos) {
endColumnPos = line.find(": warning:");
}
const std::size_t endLinePos = line.rfind(':', endColumnPos-1);
const std::size_t endNamePos = line.rfind(':', endLinePos - 1);
const std::size_t endMsgTypePos = line.find(':', endColumnPos + 2);
const std::size_t endErrorPos = line.rfind('[', std::string::npos);
if (endLinePos==std::string::npos || endNamePos==std::string::npos || endMsgTypePos==std::string::npos || endErrorPos==std::string::npos)
continue;
const std::string lineNumString = line.substr(endNamePos + 1, endLinePos - endNamePos - 1);
const std::string columnNumString = line.substr(endLinePos + 1, endColumnPos - endLinePos - 1);
const std::string messageString = line.substr(endMsgTypePos + 1, endErrorPos - endMsgTypePos - 1);
const std::string errorString = line.substr(endErrorPos, line.length());
std::string fixedpath = Path::simplifyPath(line.substr(0, endNamePos));
const int64_t lineNumber = strToInt<int64_t>(lineNumString);
const int64_t column = strToInt<int64_t>(columnNumString);
fixedpath = Path::toNativeSeparators(fixedpath);
ErrorMessage errmsg;
errmsg.callStack.emplace_back(fixedpath, lineNumber, column);
errmsg.id = "clang-tidy-" + errorString.substr(1, errorString.length() - 2);
if (errmsg.id.find("performance") != std::string::npos)
errmsg.severity = Severity::performance;
else if (errmsg.id.find("portability") != std::string::npos)
errmsg.severity = Severity::portability;
else if (errmsg.id.find("cert") != std::string::npos || errmsg.id.find("misc") != std::string::npos || errmsg.id.find("unused") != std::string::npos)
errmsg.severity = Severity::warning;
else
errmsg.severity = Severity::style;
errmsg.file0 = fixedpath;
errmsg.setmsg(messageString);
reportErr(errmsg);
}
}
bool CppCheck::analyseWholeProgram()
{
bool errors = false;
// Init CTU
CTU::maxCtuDepth = mSettings.maxCtuDepth;
// Analyse the tokens
CTU::FileInfo ctu;
for (const Check::FileInfo *fi : mFileInfo) {
const CTU::FileInfo *fi2 = dynamic_cast<const CTU::FileInfo *>(fi);
if (fi2) {
ctu.functionCalls.insert(ctu.functionCalls.end(), fi2->functionCalls.cbegin(), fi2->functionCalls.cend());
ctu.nestedCalls.insert(ctu.nestedCalls.end(), fi2->nestedCalls.cbegin(), fi2->nestedCalls.cend());
}
}
// cppcheck-suppress shadowFunction - TODO: fix this
for (Check *check : Check::instances())
errors |= check->analyseWholeProgram(&ctu, mFileInfo, mSettings, *this); // TODO: ctu
return errors && (mExitCode > 0);
}
void CppCheck::analyseWholeProgram(const std::string &buildDir, const std::list<std::pair<std::string, std::size_t>> &files, const std::list<FileSettings>& fileSettings)
{
executeAddonsWholeProgram(files); // TODO: pass FileSettings
if (buildDir.empty()) {
removeCtuInfoFiles(files, fileSettings);
return;
}
if (mSettings.checks.isEnabled(Checks::unusedFunction))
CheckUnusedFunctions::analyseWholeProgram(mSettings, this, buildDir);
std::list<Check::FileInfo*> fileInfoList;
CTU::FileInfo ctuFileInfo;
// Load all analyzer info data..
const std::string filesTxt(buildDir + "/files.txt");
std::ifstream fin(filesTxt);
std::string filesTxtLine;
while (std::getline(fin, filesTxtLine)) {
const std::string::size_type firstColon = filesTxtLine.find(':');
if (firstColon == std::string::npos)
continue;
const std::string::size_type lastColon = filesTxtLine.rfind(':');
if (firstColon == lastColon)
continue;
const std::string xmlfile = buildDir + '/' + filesTxtLine.substr(0,firstColon);
//const std::string sourcefile = filesTxtLine.substr(lastColon+1);
tinyxml2::XMLDocument doc;
const tinyxml2::XMLError error = doc.LoadFile(xmlfile.c_str());
if (error != tinyxml2::XML_SUCCESS)
continue;
const tinyxml2::XMLElement * const rootNode = doc.FirstChildElement();
if (rootNode == nullptr)
continue;
for (const tinyxml2::XMLElement *e = rootNode->FirstChildElement(); e; e = e->NextSiblingElement()) {
if (std::strcmp(e->Name(), "FileInfo") != 0)
continue;
const char *checkClassAttr = e->Attribute("check");
if (!checkClassAttr)
continue;
if (std::strcmp(checkClassAttr, "ctu") == 0) {
ctuFileInfo.loadFromXml(e);
continue;
}
// cppcheck-suppress shadowFunction - TODO: fix this
for (const Check *check : Check::instances()) {
if (checkClassAttr == check->name())
fileInfoList.push_back(check->loadFileInfoFromXml(e));
}
}
}
// Set CTU max depth
CTU::maxCtuDepth = mSettings.maxCtuDepth;
// Analyse the tokens
// cppcheck-suppress shadowFunction - TODO: fix this
for (Check *check : Check::instances())
check->analyseWholeProgram(&ctuFileInfo, fileInfoList, mSettings, *this);
for (Check::FileInfo *fi : fileInfoList)
delete fi;
}
bool CppCheck::isUnusedFunctionCheckEnabled() const
{
return (mSettings.useSingleJob() && mSettings.checks.isEnabled(Checks::unusedFunction));
}
void CppCheck::removeCtuInfoFiles(const std::list<std::pair<std::string, std::size_t>> &files, const std::list<FileSettings>& fileSettings)
{
if (mSettings.buildDir.empty()) {
for (const auto& f: files) {
const std::string &dumpFileName = getDumpFileName(mSettings, f.first);
const std::string &ctuInfoFileName = getCtuInfoFileName(dumpFileName);
std::remove(ctuInfoFileName.c_str());
}
for (const auto& fs: fileSettings) {
const std::string &dumpFileName = getDumpFileName(mSettings, fs.filename);
const std::string &ctuInfoFileName = getCtuInfoFileName(dumpFileName);
std::remove(ctuInfoFileName.c_str());
}
}
}
// cppcheck-suppress unusedFunction - only used in tests
void CppCheck::resetTimerResults()
{
s_timerResults.reset();
}
void CppCheck::printTimerResults(SHOWTIME_MODES mode)
{
s_timerResults.showResults(mode);
}
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