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cppcheck.cpp
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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2019 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 "check.h"
#include "checkunusedfunctions.h"
#include "clangimport.h"
#include "ctu.h"
#include "library.h"
#include "mathlib.h"
#include "path.h"
#include "platform.h"
#include "preprocessor.h" // Preprocessor
#include "suppressions.h"
#include "timer.h"
#include "token.h"
#include "tokenize.h" // Tokenizer
#include "tokenlist.h"
#include "version.h"
#include "exprengine.h"
#define PICOJSON_USE_INT64
#include <picojson.h>
#include <simplecpp.h>
#include <tinyxml2.h>
#include <algorithm>
#include <cstring>
#include <new>
#include <set>
#include <stdexcept>
#include <vector>
#include <memory>
#include <iostream> // <- TEMPORARY
#include <cstdio>
#ifdef HAVE_RULES
#define PCRE_STATIC
#include <pcre.h>
#endif
static const char Version[] = CPPCHECK_VERSION_STRING;
static const char ExtraVersion[] = "";
static TimerResults s_timerResults;
// CWE ids used
static const CWE CWE398(398U); // Indicator of Poor Code Quality
namespace {
struct AddonInfo {
std::string name;
std::string scriptFile;
std::string args;
static std::string getFullPath(const std::string &fileName, const std::string &exename) {
if (Path::fileExists(fileName))
return fileName;
const std::string exepath = Path::getPathFromFilename(exename);
if (Path::fileExists(exepath + fileName))
return exepath + fileName;
if (Path::fileExists(exepath + "addons/" + fileName))
return exepath + "addons/" + fileName;
#ifdef FILESDIR
if (Path::fileExists(FILESDIR + ("/" + fileName)))
return FILESDIR + ("/" + fileName);
if (Path::fileExists(FILESDIR + ("/addons/" + fileName)))
return FILESDIR + ("/addons/" + fileName);
#endif
return "";
}
std::string getAddonInfo(const std::string &fileName, const std::string &exename) {
if (fileName.find(".") == std::string::npos)
return getAddonInfo(fileName + ".py", exename);
if (endsWith(fileName, ".py", 3)) {
scriptFile = getFullPath(fileName, exename);
if (scriptFile.empty())
return "Did not find addon " + fileName;
std::string::size_type pos1 = scriptFile.rfind("/");
if (pos1 == std::string::npos)
pos1 = 0;
else
pos1++;
std::string::size_type pos2 = scriptFile.rfind(".");
if (pos2 < pos1)
pos2 = std::string::npos;
name = scriptFile.substr(pos1, pos2 - pos1);
return "";
}
if (!endsWith(fileName, ".json", 5))
return "Failed to open addon " + fileName;
std::ifstream fin(fileName);
if (!fin.is_open())
return "Failed to open " + fileName;
picojson::value json;
fin >> json;
std::string json_error = picojson::get_last_error();
if (!json_error.empty()) {
return "Loading " + fileName + " failed. " + json_error;
}
if (!json.is<picojson::object>())
return "Loading " + fileName + " failed. Bad json.";
picojson::object obj = json.get<picojson::object>();
if (obj.count("args")) {
if (!obj["args"].is<picojson::array>())
return "Loading " + fileName + " failed. args must be array.";
for (const picojson::value &v : obj["args"].get<picojson::array>())
args += " " + v.get<std::string>();
}
return getAddonInfo(obj["script"].get<std::string>(), exename);
}
};
}
static std::string executeAddon(const AddonInfo &addonInfo, const std::string &dumpFile)
{
// Can python be executed?
{
const std::string cmd = "python --version 2>&1";
#ifdef _WIN32
std::unique_ptr<FILE, decltype(&_pclose)> pipe(_popen(cmd.c_str(), "r"), _pclose);
#else
std::unique_ptr<FILE, decltype(&pclose)> pipe(popen(cmd.c_str(), "r"), pclose);
#endif
if (!pipe)
throw InternalError(nullptr, "popen failed (command: '" + cmd + "')");
char buffer[1024];
std::string result;
while (fgets(buffer, sizeof(buffer), pipe.get()) != nullptr)
result += buffer;
if (result.compare(0, 7, "Python ", 0, 7) != 0 || result.size() > 50)
throw InternalError(nullptr, "Failed to execute '" + cmd + "' (" + result + ")");
}
const std::string cmd = "python \"" + addonInfo.scriptFile + "\" --cli" + addonInfo.args + " \"" + dumpFile + "\" 2>&1";
#ifdef _WIN32
std::unique_ptr<FILE, decltype(&_pclose)> pipe(_popen(cmd.c_str(), "r"), _pclose);
#else
std::unique_ptr<FILE, decltype(&pclose)> pipe(popen(cmd.c_str(), "r"), pclose);
#endif
if (!pipe)
throw InternalError(nullptr, "popen failed (command: '" + cmd + "')");
char buffer[1024];
std::string result;
while (fgets(buffer, sizeof(buffer), pipe.get()) != nullptr) {
result += buffer;
}
// Validate output..
std::istringstream istr(result);
std::string line;
while (std::getline(istr, line)) {
if (line.compare(0,9,"Checking ", 0, 9) != 0 && !line.empty() && line[0] != '{')
throw InternalError(nullptr, "Failed to execute '" + cmd + "'. " + result);
}
// Valid results
return result;
}
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();) {
std::string::size_type endPos;
if (str[startPos] == '\"') {
endPos = str.find("\"", startPos + 1);
if (endPos < str.size())
endPos++;
} else {
endPos = str.find(sep, startPos + 1);
}
if (endPos == std::string::npos) {
ret.push_back(str.substr(startPos));
break;
}
ret.push_back(str.substr(startPos, endPos - startPos));
startPos = str.find_first_not_of(sep, endPos);
}
return ret;
}
static std::pair<bool,std::string> executeCommand(const std::string &cmd)
{
#ifdef _WIN32
std::unique_ptr<FILE, decltype(&_pclose)> pipe(_popen(cmd.c_str(), "r"), _pclose);
#else
std::unique_ptr<FILE, decltype(&pclose)> pipe(popen(cmd.c_str(), "r"), pclose);
#endif
if (!pipe)
return std::pair<bool, std::string>(false, "");
char buffer[1024];
std::string result;
while (fgets(buffer, sizeof(buffer), pipe.get()) != nullptr)
result += buffer;
return std::pair<bool, std::string>(true, result);
}
CppCheck::CppCheck(ErrorLogger &errorLogger, bool useGlobalSuppressions)
: mErrorLogger(errorLogger), mExitCode(0), mSuppressInternalErrorFound(false), mUseGlobalSuppressions(useGlobalSuppressions), mTooManyConfigs(false), mSimplify(true)
{
}
CppCheck::~CppCheck()
{
while (!mFileInfo.empty()) {
delete mFileInfo.back();
mFileInfo.pop_back();
}
s_timerResults.showResults(mSettings.showtime);
}
const char * CppCheck::version()
{
return Version;
}
const char * CppCheck::extraVersion()
{
return ExtraVersion;
}
unsigned int CppCheck::check(const std::string &path)
{
if (mSettings.clang) {
if (!mSettings.quiet)
mErrorLogger.reportOut(std::string("Checking ") + path + "...");
const std::string clang = Path::isCPP(path) ? "clang++" : "clang";
const std::string temp = mSettings.buildDir + (Path::isCPP(path) ? "/__temp__.cpp" : "/__temp__.c");
const std::string clangcmd = AnalyzerInformation::getAnalyzerInfoFile(mSettings.buildDir, path, "") + ".clang-cmd";
const std::string clangStderr = AnalyzerInformation::getAnalyzerInfoFile(mSettings.buildDir, path, "") + ".clang-stderr";
const std::string cmd1 = clang + " -v -fsyntax-only " + temp + " 2>&1";
const std::pair<bool, std::string> &result1 = executeCommand(cmd1);
if (!result1.first || result1.second.find(" -cc1 ") == std::string::npos) {
mErrorLogger.reportOut("Failed to execute '" + cmd1 + "':" + result1.second);
return 0;
}
std::istringstream details(result1.second);
std::string line;
std::string flags;
while (std::getline(details, line)) {
if (line.find(" -internal-isystem ") == std::string::npos)
continue;
const std::vector<std::string> options = split(line, " ");
for (int i = 0; i+1 < options.size(); i++) {
if (endsWith(options[i], "-isystem", 8))
flags += options[i] + " " + options[i+1] + " ";
if (options[i] == "-fcxx-exceptions")
flags += "-fcxx-exceptions ";
}
}
for (const std::string &i: mSettings.includePaths)
flags += "-I" + i + " ";
const std::string cmd = clang + " -cc1 -ast-dump " + flags + path + " 2> " + clangStderr;
std::ofstream fout(clangcmd);
fout << cmd << std::endl;
fout.close();
const std::pair<bool, std::string> &result2 = executeCommand(cmd);
if (!result2.first || result2.second.find("TranslationUnitDecl") == std::string::npos) {
std::cerr << "Failed to execute '" + cmd + "'" << std::endl;
return 0;
}
// Ensure there are not syntax errors...
{
std::ifstream fin(clangStderr);
while (std::getline(fin, line)) {
if (line.find(": fatal error:") != std::string::npos) {
// file:line:column: error: ....
const std::string::size_type pos3 = line.find(": fatal 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(pos3 + 15);
std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
ErrorLogger::ErrorMessage::FileLocation loc;
loc.setfile(Path::toNativeSeparators(filename));
loc.line = std::atoi(linenr.c_str());
loc.column = std::atoi(colnr.c_str());
locationList.push_back(loc);
ErrorLogger::ErrorMessage errmsg(locationList,
loc.getfile(),
Severity::error,
msg,
"syntaxError",
false);
reportErr(errmsg);
return 0;
}
}
}
//std::cout << "Checking Clang ast dump:\n" << result2.second << std::endl;
std::istringstream ast(result2.second);
Tokenizer tokenizer(&mSettings, this);
tokenizer.list.appendFileIfNew(path);
clangimport::parseClangAstDump(&tokenizer, ast);
ValueFlow::setValues(&tokenizer.list, const_cast<SymbolDatabase *>(tokenizer.getSymbolDatabase()), this, &mSettings);
if (mSettings.debugnormal)
tokenizer.printDebugOutput(1);
checkNormalTokens(tokenizer);
return mExitCode;
}
std::ifstream fin(path);
return checkFile(Path::simplifyPath(path), emptyString, fin);
}
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 ImportProject::FileSettings &fs)
{
CppCheck temp(mErrorLogger, mUseGlobalSuppressions);
temp.mSettings = mSettings;
if (!temp.mSettings.userDefines.empty())
temp.mSettings.userDefines += ';';
temp.mSettings.userDefines += fs.cppcheckDefines();
temp.mSettings.includePaths = fs.includePaths;
temp.mSettings.userUndefs = fs.undefs;
if (fs.platformType != Settings::Unspecified)
temp.mSettings.platform(fs.platformType);
if (mSettings.clang) {
temp.mSettings.includePaths.insert(temp.mSettings.includePaths.end(), fs.systemIncludePaths.cbegin(), fs.systemIncludePaths.cend());
temp.check(Path::simplifyPath(fs.filename));
}
std::ifstream fin(fs.filename);
return temp.checkFile(Path::simplifyPath(fs.filename), fs.cfg, fin);
}
unsigned int CppCheck::checkFile(const std::string& filename, const std::string &cfgname, std::istream& fileStream)
{
mExitCode = 0;
mSuppressInternalErrorFound = false;
// only show debug warnings for accepted C/C++ source files
if (!Path::acceptFile(filename))
mSettings.debugwarnings = false;
if (Settings::terminated())
return mExitCode;
if (!mSettings.quiet) {
std::string fixedpath = Path::simplifyPath(filename);
fixedpath = Path::toNativeSeparators(fixedpath);
mErrorLogger.reportOut(std::string("Checking ") + fixedpath + ' ' + cfgname + std::string("..."));
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.platformString());
}
}
if (plistFile.is_open()) {
plistFile << ErrorLogger::plistFooter();
plistFile.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(fileStream, files, filename, &outputList);
// If there is a syntax error, report it and stop
for (const simplecpp::Output &output : outputList) {
bool err;
switch (output.type) {
case simplecpp::Output::ERROR:
case simplecpp::Output::INCLUDE_NESTED_TOO_DEEPLY:
case simplecpp::Output::SYNTAX_ERROR:
case simplecpp::Output::UNHANDLED_CHAR_ERROR:
case simplecpp::Output::EXPLICIT_INCLUDE_NOT_FOUND:
err = true;
break;
case simplecpp::Output::WARNING:
case simplecpp::Output::MISSING_HEADER:
case simplecpp::Output::PORTABILITY_BACKSLASH:
err = false;
break;
}
if (err) {
const ErrorLogger::ErrorMessage::FileLocation loc1(output.location.file(), output.location.line, output.location.col);
std::list<ErrorLogger::ErrorMessage::FileLocation> callstack(1, loc1);
ErrorLogger::ErrorMessage errmsg(callstack,
"",
Severity::error,
output.msg,
"syntaxError",
false);
reportErr(errmsg);
return mExitCode;
}
}
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;
filename2 = mSettings.plistOutput + filename2.substr(0, filename2.find('.')) + ".plist";
plistFile.open(filename2);
plistFile << ErrorLogger::plistHeader(version(), files);
}
// write dump file xml prolog
std::ofstream fdump;
std::string dumpFile;
if (mSettings.dump || !mSettings.addons.empty()) {
if (!mSettings.dumpFile.empty())
dumpFile = mSettings.dumpFile;
else if (!mSettings.dump && !mSettings.buildDir.empty())
dumpFile = AnalyzerInformation::getAnalyzerInfoFile(mSettings.buildDir, filename, "") + ".dump";
else
dumpFile = filename + ".dump";
fdump.open(dumpFile);
if (fdump.is_open()) {
fdump << "<?xml version=\"1.0\"?>" << std::endl;
fdump << "<dumps>" << std::endl;
fdump << " <platform"
<< " name=\"" << mSettings.platformString() << '\"'
<< " char_bit=\"" << mSettings.char_bit << '\"'
<< " short_bit=\"" << mSettings.short_bit << '\"'
<< " int_bit=\"" << mSettings.int_bit << '\"'
<< " long_bit=\"" << mSettings.long_bit << '\"'
<< " long_long_bit=\"" << mSettings.long_long_bit << '\"'
<< " pointer_bit=\"" << (mSettings.sizeof_pointer * mSettings.char_bit) << '\"'
<< "/>\n";
fdump << " <rawtokens>" << std::endl;
for (unsigned int i = 0; i < files.size(); ++i)
fdump << " <file index=\"" << i << "\" name=\"" << ErrorLogger::toxml(files[i]) << "\"/>" << std::endl;
for (const simplecpp::Token *tok = tokens1.cfront(); tok; tok = tok->next) {
fdump << " <tok "
<< "fileIndex=\"" << tok->location.fileIndex << "\" "
<< "linenr=\"" << tok->location.line << "\" "
<< "column=\"" << tok->location.col << "\" "
<< "str=\"" << ErrorLogger::toxml(tok->str()) << "\""
<< "/>" << std::endl;
}
fdump << " </rawtokens>" << std::endl;
}
}
// Parse comments and then remove them
preprocessor.inlineSuppressions(tokens1);
if ((mSettings.dump || !mSettings.addons.empty()) && fdump.is_open()) {
mSettings.nomsg.dump(fdump);
}
tokens1.removeComments();
preprocessor.removeComments();
if (!mSettings.buildDir.empty()) {
// Get toolinfo
std::ostringstream toolinfo;
toolinfo << CPPCHECK_VERSION_STRING;
toolinfo << (mSettings.isEnabled(Settings::WARNING) ? 'w' : ' ');
toolinfo << (mSettings.isEnabled(Settings::STYLE) ? 's' : ' ');
toolinfo << (mSettings.isEnabled(Settings::PERFORMANCE) ? 'p' : ' ');
toolinfo << (mSettings.isEnabled(Settings::PORTABILITY) ? 'p' : ' ');
toolinfo << (mSettings.isEnabled(Settings::INFORMATION) ? 'i' : ' ');
toolinfo << mSettings.userDefines;
mSettings.nomsg.dump(toolinfo);
// Calculate checksum so it can be compared with old checksum / future checksums
const unsigned int checksum = preprocessor.calculateChecksum(tokens1, toolinfo.str());
std::list<ErrorLogger::ErrorMessage> errors;
if (!mAnalyzerInformation.analyzeFile(mSettings.buildDir, filename, cfgname, checksum, &errors)) {
while (!errors.empty()) {
reportErr(errors.front());
errors.pop_front();
}
return mExitCode; // known results => no need to reanalyze file
}
}
// 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;
}
// Run define rules on raw code
for (const Settings::Rule &rule : mSettings.rules) {
if (rule.tokenlist != "define")
continue;
std::string code;
const std::list<Directive> &directives = preprocessor.getDirectives();
for (const Directive &dir : directives) {
if (dir.str.compare(0,8,"#define ") == 0)
code += "#line " + MathLib::toString(dir.linenr) + " \"" + dir.file + "\"\n" + dir.str + '\n';
}
Tokenizer tokenizer2(&mSettings, this);
std::istringstream istr2(code);
tokenizer2.list.createTokens(istr2);
executeRules("define", tokenizer2);
break;
}
if (!mSettings.force && configurations.size() > mSettings.maxConfigs) {
if (mSettings.isEnabled(Settings::INFORMATION)) {
tooManyConfigsError(Path::toNativeSeparators(filename),configurations.size());
} else {
mTooManyConfigs = true;
}
}
std::set<unsigned long long> checksums;
unsigned 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.begin(), v1.end(), cfg) == v1.end()) {
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 (codeWithoutCfg.compare(0,5,"#file") == 0)
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 mTokenizer(&mSettings, this);
if (mSettings.showtime != SHOWTIME_MODES::SHOWTIME_NONE)
mTokenizer.setTimerResults(&s_timerResults);
try {
bool result;
// Create tokens, skip rest of iteration if failed
Timer timer("Tokenizer::createTokens", mSettings.showtime, &s_timerResults);
const simplecpp::TokenList &tokensP = preprocessor.preprocess(tokens1, mCurrentConfig, files, true);
mTokenizer.createTokens(&tokensP);
timer.stop();
hasValidConfig = true;
// 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 + "...");
}
if (tokensP.empty())
continue;
// skip rest of iteration if just checking configuration
if (mSettings.checkConfiguration)
continue;
// Check raw tokens
checkRawTokens(mTokenizer);
// Simplify tokens into normal form, skip rest of iteration if failed
Timer timer2("Tokenizer::simplifyTokens1", mSettings.showtime, &s_timerResults);
result = mTokenizer.simplifyTokens1(mCurrentConfig);
timer2.stop();
if (!result)
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);
mTokenizer.dump(fdump);
fdump << "</dump>" << std::endl;
}
// Skip if we already met the same simplified token list
if (mSettings.force || mSettings.maxConfigs > 1) {
const unsigned long long checksum = mTokenizer.list.calculateChecksum();
if (checksums.find(checksum) != checksums.end()) {
if (mSettings.debugwarnings)
purgedConfigurationMessage(filename, mCurrentConfig);
continue;
}
checksums.insert(checksum);
}
// Check normal tokens
checkNormalTokens(mTokenizer);
// Analyze info..
if (!mSettings.buildDir.empty())
checkUnusedFunctions.parseTokens(mTokenizer, filename.c_str(), &mSettings);
// simplify more if required, skip rest of iteration if failed
if (mSimplify && hasRule("simple")) {
// if further simplification fails then skip rest of iteration
Timer timer3("Tokenizer::simplifyTokenList2", mSettings.showtime, &s_timerResults);
result = mTokenizer.simplifyTokenList2();
timer3.stop();
if (!result)
continue;
if (!Settings::terminated())
executeRules("simple", mTokenizer);
}
} catch (const simplecpp::Output &o) {
// #error etc during preprocessing
configurationError.push_back((mCurrentConfig.empty() ? "\'\'" : mCurrentConfig) + " : [" + o.location.file() + ':' + MathLib::toString(o.location.line) + "] " + o.msg);
--checkCount; // don't count invalid configurations
continue;
} catch (const InternalError &e) {
std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
if (e.token) {
ErrorLogger::ErrorMessage::FileLocation loc(e.token, &mTokenizer.list);
locationList.push_back(loc);
} else {
ErrorLogger::ErrorMessage::FileLocation loc(mTokenizer.list.getSourceFilePath(), 0, 0);
ErrorLogger::ErrorMessage::FileLocation loc2(filename, 0, 0);
locationList.push_back(loc2);
locationList.push_back(loc);
}
ErrorLogger::ErrorMessage errmsg(locationList,
mTokenizer.list.getSourceFilePath(),
Severity::error,
e.errorMessage,
e.id,
false);
if (errmsg.severity == Severity::error || mSettings.isEnabled(errmsg.severity))
reportErr(errmsg);
}
}
if (!hasValidConfig && configurations.size() > 1 && mSettings.isEnabled(Settings::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;
std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
ErrorLogger::ErrorMessage::FileLocation loc;
loc.setfile(Path::toNativeSeparators(filename));
locationList.push_back(loc);
ErrorLogger::ErrorMessage errmsg(locationList,
loc.getfile(),
Severity::information,
msg,
"noValidConfiguration",
false);
reportErr(errmsg);
}
// dumped all configs, close root </dumps> element now
if ((mSettings.dump || !mSettings.addons.empty()) && fdump.is_open())
fdump << "</dumps>" << std::endl;
if (!mSettings.addons.empty()) {
fdump.close();
for (const std::string &addon : mSettings.addons) {
struct AddonInfo addonInfo;
const std::string &failedToGetAddonInfo = addonInfo.getAddonInfo(addon, mSettings.exename);
if (!failedToGetAddonInfo.empty()) {
reportOut(failedToGetAddonInfo);
mExitCode = 1;
continue;
}
const std::string results = executeAddon(addonInfo, dumpFile);
std::istringstream istr(results);
std::string line;
while (std::getline(istr, line)) {
if (line.compare(0,1,"{") != 0)
continue;
picojson::value res;
std::istringstream istr2(line);
istr2 >> res;
if (!res.is<picojson::object>())
continue;
picojson::object obj = res.get<picojson::object>();
const 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>();
ErrorLogger::ErrorMessage errmsg;
errmsg.callStack.emplace_back(ErrorLogger::ErrorMessage::FileLocation(fileName, lineNumber, column));
errmsg.id = obj["addon"].get<std::string>() + "-" + obj["errorId"].get<std::string>();
const std::string text = obj["message"].get<std::string>();
errmsg.setmsg(text);
const std::string severity = obj["severity"].get<std::string>();
errmsg.severity = Severity::fromString(severity);
if (errmsg.severity == Severity::SeverityType::none)
continue;
errmsg.file0 = fileName;
reportErr(errmsg);
}
}
std::remove(dumpFile.c_str());
}
} catch (const std::runtime_error &e) {
internalError(filename, e.what());
} catch (const std::bad_alloc &e) {
internalError(filename, e.what());
} catch (const InternalError &e) {
internalError(filename, e.errorMessage);
mExitCode=1; // e.g. reflect a syntax error
}
mAnalyzerInformation.setFileInfo("CheckUnusedFunctions", checkUnusedFunctions.analyzerInfo());
mAnalyzerInformation.close();
// In jointSuppressionReport mode, unmatched suppressions are
// collected after all files are processed
if (!mSettings.jointSuppressionReport && (mSettings.isEnabled(Settings::INFORMATION) || mSettings.checkConfiguration)) {
reportUnmatchedSuppressions(mSettings.nomsg.getUnmatchedLocalSuppressions(filename, isUnusedFunctionCheckEnabled()));
}
mErrorList.clear();
return mExitCode;
}
void CppCheck::internalError(const std::string &filename, const std::string &msg)
{
const std::string fixedpath = Path::toNativeSeparators(filename);
const std::string fullmsg("Bailing out from checking " + fixedpath + " since there was an internal error: " + msg);
if (mSettings.isEnabled(Settings::INFORMATION)) {
const ErrorLogger::ErrorMessage::FileLocation loc1(filename, 0, 0);
std::list<ErrorLogger::ErrorMessage::FileLocation> callstack(1, loc1);
ErrorLogger::ErrorMessage errmsg(callstack,
emptyString,
Severity::information,
fullmsg,
"internalError",
false);
mErrorLogger.reportErr(errmsg);
} else {
// Report on stdout
mErrorLogger.reportOut(fullmsg);
}
}
//---------------------------------------------------------------------------
// CppCheck - A function that checks a raw token list
//---------------------------------------------------------------------------
void CppCheck::checkRawTokens(const Tokenizer &tokenizer)
{
// Execute rules for "raw" code
executeRules("raw", tokenizer);
}
//---------------------------------------------------------------------------
// CppCheck - A function that checks a normal token list
//---------------------------------------------------------------------------
void CppCheck::checkNormalTokens(const Tokenizer &tokenizer)
{
if (mSettings.bugHunting)
ExprEngine::runChecks(this, &tokenizer, &mSettings);
else {
// call all "runChecks" in all registered Check classes
for (Check *check : Check::instances()) {
if (Settings::terminated())
return;
if (Tokenizer::isMaxTime())
return;
Timer timerRunChecks(check->name() + "::runChecks", mSettings.showtime, &s_timerResults);
check->runChecks(&tokenizer, &mSettings, this);
}
if (mSettings.clang)
// TODO: Use CTU for Clang analysis
return;
// Analyse the tokens..
CTU::FileInfo *fi1 = CTU::getFileInfo(&tokenizer);
if (fi1) {
mFileInfo.push_back(fi1);
mAnalyzerInformation.setFileInfo("ctu", fi1->toString());
}
for (const Check *check : Check::instances()) {
Check::FileInfo *fi = check->getFileInfo(&tokenizer, &mSettings);
if (fi != nullptr) {
mFileInfo.push_back(fi);
mAnalyzerInformation.setFileInfo(check->name(), fi->toString());
}
}
executeRules("normal", tokenizer);
}
}
//---------------------------------------------------------------------------
bool CppCheck::hasRule(const std::string &tokenlist) const
{
#ifdef HAVE_RULES
for (const Settings::Rule &rule : mSettings.rules) {
if (rule.tokenlist == tokenlist)
return true;
}
#else
(void)tokenlist;
#endif
return false;
}
#ifdef HAVE_RULES
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 "