enum PipeSignal {REPORT_OUT='1',REPORT_ERROR='2', REPORT_INFO='3', REPORT_VERIFICATION='4', CHILD_END='5'};

explicit PipeWriter(int pipe) : mWpipe(pipe) {}

void reportOut(const std::string &outmsg, Color c) override {

writeToPipe(REPORT_OUT, ::toString(c) + outmsg + ::toString(Color::Reset));

}

void reportErr(const ErrorMessage &msg) override {

report(msg, MessageType::REPORT_ERROR);

}

void reportInfo(const ErrorMessage &msg) override {

report(msg, MessageType::REPORT_INFO);

}

void writeEnd(const std::string& str) const {

writeToPipe(CHILD_END, str);

}

enum class MessageType {REPORT_ERROR, REPORT_INFO};

void report(const ErrorMessage &msg, MessageType msgType) const {

PipeSignal pipeSignal;

switch (msgType) {

case MessageType::REPORT_ERROR:

pipeSignal = REPORT_ERROR;

break;

case MessageType::REPORT_INFO:

pipeSignal = REPORT_INFO;

break;

}

writeToPipe(pipeSignal, msg.serialize());

}

void writeToPipe(PipeSignal type, const std::string &data) const

{

unsigned int len = static_cast<unsigned int>(data.length() + 1);

char *out = new char[len + 1 + sizeof(len)];

out[0] = static_cast<char>(type);

std::memcpy(&(out[1]), &len, sizeof(len));

std::memcpy(&(out[1+sizeof(len)]), data.c_str(), len);

if (write(mWpipe, out, len + 1 + sizeof(len)) <= 0) {

delete[] out;

out = nullptr;

std::cerr << "#### ThreadExecutor::writeToPipe, Failed to write to pipe" << std::endl;

std::exit(EXIT_FAILURE);

}

delete[] out;

}

const int mWpipe;

{

char type = 0;

if (read(rpipe, &type, 1) <= 0) {

if (errno == EAGAIN)

return 0;

// need to increment so a missing pipe (i.e. premature exit of forked process) results in an error exitcode

++result;

return -1;

}

if (type != PipeWriter::REPORT_OUT && type != PipeWriter::REPORT_ERROR && type != PipeWriter::REPORT_INFO && type != PipeWriter::CHILD_END) {

std::cerr << "#### ThreadExecutor::handleRead error, type was:" << type << std::endl;

std::exit(EXIT_FAILURE);

}

unsigned int len = 0;

if (read(rpipe, &len, sizeof(len)) <= 0) {

std::cerr << "#### ThreadExecutor::handleRead error, type was:" << type << std::endl;

std::exit(EXIT_FAILURE);

}

// Don't rely on incoming data being null-terminated.

// Allocate +1 element and null-terminate the buffer.

char *buf = new char[len + 1];

const ssize_t readIntoBuf = read(rpipe, buf, len);

if (readIntoBuf <= 0) {

std::cerr << "#### ThreadExecutor::handleRead error, type was:" << type << std::endl;

std::exit(EXIT_FAILURE);

}

buf[readIntoBuf] = 0;

if (type == PipeWriter::REPORT_OUT) {

mErrorLogger.reportOut(buf);

} else if (type == PipeWriter::REPORT_ERROR || type == PipeWriter::REPORT_INFO) {

ErrorMessage msg;

try {

msg.deserialize(buf);

} catch (const InternalError& e) {

std::cerr << "#### ThreadExecutor::handleRead error, internal error:" << e.errorMessage << std::endl;

std::exit(EXIT_FAILURE);

}

if (!mSettings.nomsg.isSuppressed(msg.toSuppressionsErrorMessage())) {

// Alert only about unique errors

std::string errmsg = msg.toString(mSettings.verbose);

if (std::find(mErrorList.cbegin(), mErrorList.cend(), errmsg) == mErrorList.cend()) {

mErrorList.emplace_back(std::move(errmsg));

if (type == PipeWriter::REPORT_ERROR)

mErrorLogger.reportErr(msg);

else

mErrorLogger.reportInfo(msg);

}

}

} else if (type == PipeWriter::CHILD_END) {

std::istringstream iss(buf);

unsigned int fileResult = 0;

iss >> fileResult;

result += fileResult;

delete[] buf;

return -1;

}

delete[] buf;

return 1;

{

#if defined(__QNX__) || defined(__HAIKU__) // getloadavg() is unsupported on Qnx, Haiku.

(void)nchildren;

return true;

#else

if (!nchildren || !mSettings.loadAverage) {

return true;

}

double sample(0);

if (getloadavg(&sample, 1) != 1) {

// disable load average checking on getloadavg error

return true;

} else if (sample < mSettings.loadAverage) {

return true;

}

return false;

#endif

{

unsigned int fileCount = 0;

unsigned int result = 0;

const std::size_t totalfilesize = std::accumulate(mFiles.cbegin(), mFiles.cend(), std::size_t(0), [](std::size_t v, const std::pair<std::string, std::size_t>& p) {

return v + p.second;

});

std::list<int> rpipes;

std::map<pid_t, std::string> childFile;

std::map<int, std::string> pipeFile;

std::size_t processedsize = 0;

std::map<std::string, std::size_t>::const_iterator iFile = mFiles.cbegin();

std::list<ImportProject::FileSettings>::const_iterator iFileSettings = mSettings.project.fileSettings.cbegin();

for (;;) {

// Start a new child

const size_t nchildren = childFile.size();

if ((iFile != mFiles.cend() || iFileSettings != mSettings.project.fileSettings.cend()) && nchildren < mSettings.jobs && checkLoadAverage(nchildren)) {

int pipes[2];

if (pipe(pipes) == -1) {

std::cerr << "#### ThreadExecutor::check, pipe() failed: "<< std::strerror(errno) << std::endl;

std::exit(EXIT_FAILURE);

}

const int flags = fcntl(pipes[0], F_GETFL, 0);

if (flags < 0) {

std::cerr << "#### ThreadExecutor::check, fcntl(F_GETFL) failed: "<< std::strerror(errno) << std::endl;

std::exit(EXIT_FAILURE);

}

if (fcntl(pipes[0], F_SETFL, flags | O_NONBLOCK) < 0) {

std::cerr << "#### ThreadExecutor::check, fcntl(F_SETFL) failed: "<< std::strerror(errno) << std::endl;

std::exit(EXIT_FAILURE);

}

const pid_t pid = fork();

if (pid < 0) {

// Error

std::cerr << "#### ThreadExecutor::check, Failed to create child process: "<< std::strerror(errno) << std::endl;

std::exit(EXIT_FAILURE);

} else if (pid == 0) {

#if defined(__linux__)

prctl(PR_SET_PDEATHSIG, SIGHUP);

#endif

close(pipes[0]);

PipeWriter pipewriter(pipes[1]);

CppCheck fileChecker(pipewriter, false, CppCheckExecutor::executeCommand);

fileChecker.settings() = mSettings;

unsigned int resultOfCheck = 0;

if (iFileSettings != mSettings.project.fileSettings.end()) {

resultOfCheck = fileChecker.check(*iFileSettings);

} else {

// Read file from a file

resultOfCheck = fileChecker.check(iFile->first);

}

pipewriter.writeEnd(std::to_string(resultOfCheck));

std::exit(EXIT_SUCCESS);

}

close(pipes[1]);

rpipes.push_back(pipes[0]);

if (iFileSettings != mSettings.project.fileSettings.end()) {

childFile[pid] = iFileSettings->filename + ' ' + iFileSettings->cfg;

pipeFile[pipes[0]] = iFileSettings->filename + ' ' + iFileSettings->cfg;

++iFileSettings;

} else {

childFile[pid] = iFile->first;

pipeFile[pipes[0]] = iFile->first;

++iFile;

}

}

if (!rpipes.empty()) {

fd_set rfds;

FD_ZERO(&rfds);

for (std::list<int>::const_iterator rp = rpipes.cbegin(); rp != rpipes.cend(); ++rp)

FD_SET(*rp, &rfds);

struct timeval tv; // for every second polling of load average condition

tv.tv_sec = 1;

tv.tv_usec = 0;

const int r = select(*std::max_element(rpipes.cbegin(), rpipes.cend()) + 1, &rfds, nullptr, nullptr, &tv);

if (r > 0) {

std::list<int>::iterator rp = rpipes.begin();

while (rp != rpipes.end()) {

if (FD_ISSET(*rp, &rfds)) {

const int readRes = handleRead(*rp, result);

if (readRes == -1) {

std::size_t size = 0;

const std::map<int, std::string>::iterator p = pipeFile.find(*rp);

if (p != pipeFile.end()) {

std::string name = p->second;

pipeFile.erase(p);

const std::map<std::string, std::size_t>::const_iterator fs = mFiles.find(name);

if (fs != mFiles.end()) {

size = fs->second;

}

}

fileCount++;

processedsize += size;

if (!mSettings.quiet)

CppCheckExecutor::reportStatus(fileCount, mFiles.size() + mSettings.project.fileSettings.size(), processedsize, totalfilesize);

close(*rp);

rp = rpipes.erase(rp);

} else

++rp;

} else

++rp;

}

}

}

if (!childFile.empty()) {

int stat = 0;

const pid_t child = waitpid(0, &stat, WNOHANG);

if (child > 0) {

std::string childname;

const std::map<pid_t, std::string>::iterator c = childFile.find(child);

if (c != childFile.end()) {

childname = c->second;

childFile.erase(c);

}

if (WIFEXITED(stat)) {

const int exitstatus = WEXITSTATUS(stat);

if (exitstatus != EXIT_SUCCESS) {

std::ostringstream oss;

oss << "Child process exited with " << exitstatus;

reportInternalChildErr(childname, oss.str());

}

} else if (WIFSIGNALED(stat)) {

std::ostringstream oss;

oss << "Child process crashed with signal " << WTERMSIG(stat);

reportInternalChildErr(childname, oss.str());

}

}

}

if (iFile == mFiles.end() && iFileSettings == mSettings.project.fileSettings.end() && rpipes.empty() && childFile.empty()) {

// All done

break;

}

}

return result;

{

std::list<ErrorMessage::FileLocation> locations;

locations.emplace_back(childname, 0, 0);

const ErrorMessage errmsg(locations,

emptyString,

Severity::error,

"Internal error: " + msg,

"cppcheckError",

Certainty::normal);

if (!mSettings.nomsg.isSuppressed(errmsg.toSuppressionsErrorMessage()))

mErrorLogger.reportErr(errmsg);