327 lines
9.1 KiB
C++
327 lines
9.1 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2011 Daniel Marjamäki and Cppcheck team.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "threadexecutor.h"
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#include "cppcheck.h"
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#include <iostream>
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#include <algorithm>
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#ifdef THREADING_MODEL_FORK
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#include <sys/wait.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <cstdlib>
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#include <cstring>
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#include <cstdio>
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#include <errno.h>
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#include <time.h>
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#endif
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ThreadExecutor::ThreadExecutor(const std::vector<std::string> &filenames, Settings &settings, ErrorLogger &errorLogger)
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: _filenames(filenames), _settings(settings), _errorLogger(errorLogger), _fileCount(0)
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{
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#ifdef THREADING_MODEL_FORK
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_wpipe = 0;
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#endif
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}
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ThreadExecutor::~ThreadExecutor()
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{
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//dtor
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}
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void ThreadExecutor::addFileContent(const std::string &path, const std::string &content)
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{
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_fileContents[ path ] = content;
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}
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///////////////////////////////////////////////////////////////////////////////
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////// This code is for platforms that support fork() only ////////////////////
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///////////////////////////////////////////////////////////////////////////////
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#ifdef THREADING_MODEL_FORK
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int ThreadExecutor::handleRead(int rpipe, unsigned int &result)
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{
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char type = 0;
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if (read(rpipe, &type, 1) <= 0)
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{
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if (errno == EAGAIN)
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return 0;
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return -1;
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}
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if (type != '1' && type != '2' && type != '3')
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{
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std::cerr << "#### You found a bug from cppcheck.\nThreadExecutor::handleRead error, type was:" << type << std::endl;
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exit(0);
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}
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unsigned int len = 0;
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if (read(rpipe, &len, sizeof(len)) <= 0)
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{
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std::cerr << "#### You found a bug from cppcheck.\nThreadExecutor::handleRead error, type was:" << type << std::endl;
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exit(0);
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}
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char *buf = new char[len];
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if (read(rpipe, buf, len) <= 0)
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{
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std::cerr << "#### You found a bug from cppcheck.\nThreadExecutor::handleRead error, type was:" << type << std::endl;
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exit(0);
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}
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if (type == '1')
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{
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_errorLogger.reportOut(buf);
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}
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else if (type == '2')
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{
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ErrorLogger::ErrorMessage msg;
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msg.deserialize(buf);
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std::string file;
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unsigned int line(0);
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if (!msg._callStack.empty())
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{
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file = msg._callStack.back().getfile(false);
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line = msg._callStack.back().line;
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}
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if (!_settings.nomsg.isSuppressed(msg._id, file, line))
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{
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// Alert only about unique errors
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std::string errmsg = msg.toString(_settings._verbose);
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if (std::find(_errorList.begin(), _errorList.end(), errmsg) == _errorList.end())
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{
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_errorList.push_back(errmsg);
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_errorLogger.reportErr(msg);
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}
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}
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}
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else if (type == '3')
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{
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_fileCount++;
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std::istringstream iss(buf);
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unsigned int fileResult = 0;
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iss >> fileResult;
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result += fileResult;
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_errorLogger.reportStatus(_fileCount, _filenames.size());
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delete [] buf;
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return -1;
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}
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delete [] buf;
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return 1;
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}
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unsigned int ThreadExecutor::check()
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{
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_fileCount = 0;
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unsigned int result = 0;
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std::list<int> rpipes;
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std::map<pid_t, std::string> childFile;
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unsigned int i = 0;
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while (true)
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{
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// Start a new child
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if (i < _filenames.size() && rpipes.size() < _settings._jobs)
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{
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int pipes[2];
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if (pipe(pipes) == -1)
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{
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perror("pipe");
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exit(1);
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}
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int flags = 0;
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if ((flags = fcntl(pipes[0], F_GETFL, 0)) < 0)
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{
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perror("fcntl");
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exit(1);
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}
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if (fcntl(pipes[0], F_SETFL, flags | O_NONBLOCK) < 0)
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{
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perror("fcntl");
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exit(1);
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}
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pid_t pid = fork();
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if (pid < 0)
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{
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// Error
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std::cerr << "Failed to create child process" << std::endl;
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exit(EXIT_FAILURE);
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}
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else if (pid == 0)
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{
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close(pipes[0]);
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_wpipe = pipes[1];
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CppCheck fileChecker(*this, false);
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fileChecker.settings(_settings);
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if (_fileContents.size() > 0 && _fileContents.find(_filenames[i]) != _fileContents.end())
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{
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// File content was given as a string
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fileChecker.addFile(_filenames[i], _fileContents[ _filenames[i] ]);
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}
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else
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{
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// Read file from a file
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fileChecker.addFile(_filenames[i]);
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}
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unsigned int resultOfCheck = fileChecker.check();
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std::ostringstream oss;
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oss << resultOfCheck;
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writeToPipe('3', oss.str());
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exit(0);
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}
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close(pipes[1]);
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rpipes.push_back(pipes[0]);
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childFile[pid] = _filenames[i];
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++i;
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}
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else if (!rpipes.empty())
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{
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fd_set rfds;
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FD_ZERO(&rfds);
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for (std::list<int>::const_iterator rp = rpipes.begin(); rp != rpipes.end(); ++rp)
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FD_SET(*rp, &rfds);
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int r = select(*std::max_element(rpipes.begin(), rpipes.end()) + 1, &rfds, NULL, NULL, NULL);
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if (r > 0)
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{
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std::list<int>::iterator rp = rpipes.begin();
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while (rp != rpipes.end())
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{
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if (FD_ISSET(*rp, &rfds))
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{
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int readRes = handleRead(*rp, result);
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if (readRes == -1)
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{
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close(*rp);
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rp = rpipes.erase(rp);
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}
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else
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++rp;
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}
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else
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++rp;
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}
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}
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int stat = 0;
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pid_t child = waitpid(0, &stat, WNOHANG);
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if (child > 0)
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{
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std::string childname;
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std::map<pid_t, std::string>::iterator c = childFile.find(child);
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if (c != childFile.end())
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{
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childname = c->second;
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childFile.erase(c);
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}
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if (WIFSIGNALED(stat))
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{
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std::ostringstream oss;
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oss << "Internal error: Child process crashed with signal " << WTERMSIG(stat);
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std::list<ErrorLogger::ErrorMessage::FileLocation> locations;
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locations.push_back(ErrorLogger::ErrorMessage::FileLocation(childname, 0));
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const ErrorLogger::ErrorMessage errmsg(locations,
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Severity::error,
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oss.str(),
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"cppcheckError",
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false);
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_errorLogger.reportErr(errmsg);
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}
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}
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}
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else
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{
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// All done
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break;
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}
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}
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return result;
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}
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void ThreadExecutor::writeToPipe(char type, const std::string &data)
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{
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unsigned int len = data.length() + 1;
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char *out = new char[ len + 1 + sizeof(len)];
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out[0] = type;
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std::memcpy(&(out[1]), &len, sizeof(len));
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std::memcpy(&(out[1+sizeof(len)]), data.c_str(), len);
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if (write(_wpipe, out, len + 1 + sizeof(len)) <= 0)
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{
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delete [] out;
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out = 0;
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std::cerr << "#### ThreadExecutor::writeToPipe, Failed to write to pipe" << std::endl;
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exit(0);
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}
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delete [] out;
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}
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void ThreadExecutor::reportOut(const std::string &outmsg)
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{
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writeToPipe('1', outmsg);
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}
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void ThreadExecutor::reportErr(const ErrorLogger::ErrorMessage &msg)
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{
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writeToPipe('2', msg.serialize());
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}
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void ThreadExecutor::reportStatus(unsigned int /*index*/, unsigned int /*max*/)
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{
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// Not used
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}
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#else
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unsigned int ThreadExecutor::check()
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{
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return 0;
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}
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void ThreadExecutor::reportOut(const std::string &/*outmsg*/)
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{
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}
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void ThreadExecutor::reportErr(const ErrorLogger::ErrorMessage &/*msg*/)
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{
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}
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void ThreadExecutor::reportStatus(unsigned int /*index*/, unsigned int /*max*/)
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{
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}
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#endif
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