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cppcheck/cli/threadexecutor.cpp

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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2020 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 "threadexecutor.h"
#include "config.h"
#include "cppcheck.h"
#include "cppcheckexecutor.h"
#include "importproject.h"
#include "settings.h"
#include "suppressions.h"
#include <algorithm>
#include <cerrno>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <utility>
#ifdef __SVR4 // Solaris
#include <sys/loadavg.h>
#endif
#ifdef THREADING_MODEL_FORK
#if defined(__linux__)
#include <sys/prctl.h>
#endif
#include <sys/select.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <unistd.h>
#endif
#ifdef THREADING_MODEL_WIN
#include <process.h>
#include <windows.h>
#endif
// required for FD_ZERO
using std::memset;
ThreadExecutor::ThreadExecutor(const std::map<std::string, std::size_t> &files, Settings &settings, ErrorLogger &errorLogger)
: mFiles(files), mSettings(settings), mErrorLogger(errorLogger), mFileCount(0)
// Not initialized mFileSync, mErrorSync, mReportSync
{
#if defined(THREADING_MODEL_FORK)
mWpipe = 0;
#elif defined(THREADING_MODEL_WIN)
mProcessedFiles = 0;
mTotalFiles = 0;
mProcessedSize = 0;
mTotalFileSize = 0;
#endif
}
ThreadExecutor::~ThreadExecutor()
{
//dtor
}
///////////////////////////////////////////////////////////////////////////////
////// This code is for platforms that support fork() only ////////////////////
///////////////////////////////////////////////////////////////////////////////
#if defined(THREADING_MODEL_FORK)
void ThreadExecutor::addFileContent(const std::string &path, const std::string &content)
{
mFileContents[ path ] = content;
}
int ThreadExecutor::handleRead(int rpipe, unsigned int &result)
{
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 != REPORT_OUT && type != REPORT_ERROR && type != REPORT_INFO && type != 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 == REPORT_OUT) {
mErrorLogger.reportOut(buf);
} else if (type == REPORT_ERROR || type == REPORT_INFO) {
ErrorMessage msg;
msg.deserialize(buf);
if (!mSettings.nomsg.isSuppressed(msg.toSuppressionsErrorMessage())) {
// Alert only about unique errors
std::string errmsg = msg.toString(mSettings.verbose);
if (std::find(mErrorList.begin(), mErrorList.end(), errmsg) == mErrorList.end()) {
mErrorList.emplace_back(errmsg);
if (type == REPORT_ERROR)
mErrorLogger.reportErr(msg);
else
mErrorLogger.reportInfo(msg);
}
}
} else if (type == CHILD_END) {
std::istringstream iss(buf);
unsigned int fileResult = 0;
iss >> fileResult;
result += fileResult;
delete [] buf;
return -1;
}
delete [] buf;
return 1;
}
bool ThreadExecutor::checkLoadAverage(size_t nchildren)
{
#if defined(__CYGWIN__) || defined(__QNX__) // getloadavg() is unsupported on Cygwin, Qnx.
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 ThreadExecutor::check()
{
mFileCount = 0;
unsigned int result = 0;
std::size_t totalfilesize = 0;
for (std::map<std::string, std::size_t>::const_iterator i = mFiles.begin(); i != mFiles.end(); ++i) {
totalfilesize += i->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.begin();
std::list<ImportProject::FileSettings>::const_iterator iFileSettings = mSettings.project.fileSettings.begin();
for (;;) {
// Start a new child
size_t nchildren = childFile.size();
if ((iFile != mFiles.end() || iFileSettings != mSettings.project.fileSettings.end()) && 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);
}
int flags = 0;
if ((flags = fcntl(pipes[0], F_GETFL, 0)) < 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);
}
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]);
mWpipe = pipes[1];
CppCheck fileChecker(*this, false, CppCheckExecutor::executeCommand);
fileChecker.settings() = mSettings;
unsigned int resultOfCheck = 0;
if (iFileSettings != mSettings.project.fileSettings.end()) {
resultOfCheck = fileChecker.check(*iFileSettings);
} else if (!mFileContents.empty() && mFileContents.find(iFile->first) != mFileContents.end()) {
// File content was given as a string
resultOfCheck = fileChecker.check(iFile->first, mFileContents[ iFile->first ]);
} else {
// Read file from a file
resultOfCheck = fileChecker.check(iFile->first);
}
std::ostringstream oss;
oss << resultOfCheck;
writeToPipe(CHILD_END, oss.str());
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.begin(); rp != rpipes.end(); ++rp)
FD_SET(*rp, &rfds);
struct timeval tv; // for every second polling of load average condition
tv.tv_sec = 1;
tv.tv_usec = 0;
int r = select(*std::max_element(rpipes.begin(), rpipes.end()) + 1, &rfds, nullptr, nullptr, &tv);
if (r > 0) {
std::list<int>::iterator rp = rpipes.begin();
while (rp != rpipes.end()) {
if (FD_ISSET(*rp, &rfds)) {
int readRes = handleRead(*rp, result);
if (readRes == -1) {
std::size_t size = 0;
std::map<int, std::string>::iterator p = pipeFile.find(*rp);
if (p != pipeFile.end()) {
std::string name = p->second;
pipeFile.erase(p);
std::map<std::string, std::size_t>::const_iterator fs = mFiles.find(name);
if (fs != mFiles.end()) {
size = fs->second;
}
}
mFileCount++;
processedsize += size;
if (!mSettings.quiet)
CppCheckExecutor::reportStatus(mFileCount, mFiles.size() + mSettings.project.fileSettings.size(), processedsize, totalfilesize);
close(*rp);
rp = rpipes.erase(rp);
} else
++rp;
} else
++rp;
}
}
}
if (!childFile.empty()) {
int stat = 0;
pid_t child = waitpid(0, &stat, WNOHANG);
if (child > 0) {
std::string childname;
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;
}
void ThreadExecutor::writeToPipe(PipeSignal type, const std::string &data)
{
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;
}
void ThreadExecutor::reportOut(const std::string &outmsg)
{
writeToPipe(REPORT_OUT, outmsg);
}
void ThreadExecutor::reportErr(const ErrorMessage &msg)
{
writeToPipe(REPORT_ERROR, msg.serialize());
}
void ThreadExecutor::reportInfo(const ErrorMessage &msg)
{
writeToPipe(REPORT_INFO, msg.serialize());
}
void ThreadExecutor::bughuntingReport(const std::string &str)
{
writeToPipe(REPORT_VERIFICATION, str);
}
void ThreadExecutor::reportInternalChildErr(const std::string &childname, const std::string &msg)
{
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);
}
#elif defined(THREADING_MODEL_WIN)
void ThreadExecutor::addFileContent(const std::string &path, const std::string &content)
{
mFileContents[path] = content;
}
unsigned int ThreadExecutor::check()
{
HANDLE *threadHandles = new HANDLE[mSettings.jobs];
mItNextFile = mFiles.begin();
mItNextFileSettings = mSettings.project.fileSettings.begin();
mProcessedFiles = 0;
mProcessedSize = 0;
mTotalFiles = mFiles.size() + mSettings.project.fileSettings.size();
mTotalFileSize = 0;
for (std::map<std::string, std::size_t>::const_iterator i = mFiles.begin(); i != mFiles.end(); ++i) {
mTotalFileSize += i->second;
}
InitializeCriticalSection(&mFileSync);
InitializeCriticalSection(&mErrorSync);
InitializeCriticalSection(&mReportSync);
for (unsigned int i = 0; i < mSettings.jobs; ++i) {
threadHandles[i] = (HANDLE)_beginthreadex(nullptr, 0, threadProc, this, 0, nullptr);
if (!threadHandles[i]) {
std::cerr << "#### ThreadExecutor::check error, errno :" << errno << std::endl;
exit(EXIT_FAILURE);
}
}
const DWORD waitResult = WaitForMultipleObjects(mSettings.jobs, threadHandles, TRUE, INFINITE);
if (waitResult != WAIT_OBJECT_0) {
if (waitResult == WAIT_FAILED) {
std::cerr << "#### ThreadExecutor::check wait failed, result: " << waitResult << " error: " << GetLastError() << std::endl;
exit(EXIT_FAILURE);
} else {
std::cerr << "#### ThreadExecutor::check wait failed, result: " << waitResult << std::endl;
exit(EXIT_FAILURE);
}
}
unsigned int result = 0;
for (unsigned int i = 0; i < mSettings.jobs; ++i) {
DWORD exitCode;
if (!GetExitCodeThread(threadHandles[i], &exitCode)) {
std::cerr << "#### ThreadExecutor::check get exit code failed, error:" << GetLastError() << std::endl;
exit(EXIT_FAILURE);
}
result += exitCode;
if (!CloseHandle(threadHandles[i])) {
std::cerr << "#### ThreadExecutor::check close handle failed, error:" << GetLastError() << std::endl;
exit(EXIT_FAILURE);
}
}
DeleteCriticalSection(&mFileSync);
DeleteCriticalSection(&mErrorSync);
DeleteCriticalSection(&mReportSync);
delete[] threadHandles;
return result;
}
unsigned int __stdcall ThreadExecutor::threadProc(void *args)
{
unsigned int result = 0;
ThreadExecutor *threadExecutor = static_cast<ThreadExecutor*>(args);
std::map<std::string, std::size_t>::const_iterator &itFile = threadExecutor->mItNextFile;
std::list<ImportProject::FileSettings>::const_iterator &itFileSettings = threadExecutor->mItNextFileSettings;
// guard static members of CppCheck against concurrent access
EnterCriticalSection(&threadExecutor->mFileSync);
CppCheck fileChecker(*threadExecutor, false, CppCheckExecutor::executeCommand);
fileChecker.settings() = threadExecutor->mSettings;
for (;;) {
if (itFile == threadExecutor->mFiles.end() && itFileSettings == threadExecutor->mSettings.project.fileSettings.end()) {
LeaveCriticalSection(&threadExecutor->mFileSync);
break;
}
std::size_t fileSize = 0;
if (itFile != threadExecutor->mFiles.end()) {
const std::string &file = itFile->first;
fileSize = itFile->second;
++itFile;
LeaveCriticalSection(&threadExecutor->mFileSync);
const std::map<std::string, std::string>::const_iterator fileContent = threadExecutor->mFileContents.find(file);
if (fileContent != threadExecutor->mFileContents.end()) {
// File content was given as a string
result += fileChecker.check(file, fileContent->second);
} else {
// Read file from a file
result += fileChecker.check(file);
}
} else { // file settings..
const ImportProject::FileSettings &fs = *itFileSettings;
++itFileSettings;
LeaveCriticalSection(&threadExecutor->mFileSync);
result += fileChecker.check(fs);
if (threadExecutor->mSettings.clangTidy)
fileChecker.analyseClangTidy(fs);
}
EnterCriticalSection(&threadExecutor->mFileSync);
threadExecutor->mProcessedSize += fileSize;
threadExecutor->mProcessedFiles++;
if (!threadExecutor->mSettings.quiet) {
EnterCriticalSection(&threadExecutor->mReportSync);
CppCheckExecutor::reportStatus(threadExecutor->mProcessedFiles, threadExecutor->mTotalFiles, threadExecutor->mProcessedSize, threadExecutor->mTotalFileSize);
LeaveCriticalSection(&threadExecutor->mReportSync);
}
}
return result;
}
void ThreadExecutor::reportOut(const std::string &outmsg)
{
EnterCriticalSection(&mReportSync);
mErrorLogger.reportOut(outmsg);
LeaveCriticalSection(&mReportSync);
}
void ThreadExecutor::reportErr(const ErrorMessage &msg)
{
report(msg, MessageType::REPORT_ERROR);
}
void ThreadExecutor::reportInfo(const ErrorMessage &msg)
{
report(msg, MessageType::REPORT_INFO);
}
void ThreadExecutor::bughuntingReport(const std::string &/*str*/)
{
// TODO
}
void ThreadExecutor::report(const ErrorMessage &msg, MessageType msgType)
{
if (mSettings.nomsg.isSuppressed(msg.toSuppressionsErrorMessage()))
return;
// Alert only about unique errors
bool reportError = false;
const std::string errmsg = msg.toString(mSettings.verbose);
EnterCriticalSection(&mErrorSync);
if (std::find(mErrorList.begin(), mErrorList.end(), errmsg) == mErrorList.end()) {
mErrorList.emplace_back(errmsg);
reportError = true;
}
LeaveCriticalSection(&mErrorSync);
if (reportError) {
EnterCriticalSection(&mReportSync);
switch (msgType) {
case MessageType::REPORT_ERROR:
mErrorLogger.reportErr(msg);
break;
case MessageType::REPORT_INFO:
mErrorLogger.reportInfo(msg);
break;
}
LeaveCriticalSection(&mReportSync);
}
}
#else
void ThreadExecutor::addFileContent(const std::string &/*path*/, const std::string &/*content*/)
{
}
unsigned int ThreadExecutor::check()
{
return 0;
}
void ThreadExecutor::reportOut(const std::string &/*outmsg*/)
{
}
void ThreadExecutor::reportErr(const ErrorMessage &/*msg*/)
{
}
void ThreadExecutor::reportInfo(const ErrorMessage &/*msg*/)
{
}
void ThreadExecutor::bughuntingReport(const std::string &/*str*/)
{
}
#endif
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