384 lines
13 KiB
C++
384 lines
13 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2022 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 "processexecutor.h"
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#if !defined(WIN32) && !defined(__MINGW32__)
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#include "color.h"
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#include "config.h"
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#include "cppcheck.h"
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#include "cppcheckexecutor.h"
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#include "errorlogger.h"
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#include "errortypes.h"
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#include "importproject.h"
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#include "settings.h"
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#include "suppressions.h"
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#include <algorithm>
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#include <cerrno>
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#include <csignal>
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#include <cstdlib>
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#include <cstring>
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#include <fcntl.h>
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#include <functional>
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#include <iostream>
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#include <list>
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#include <sys/select.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <utility>
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#ifdef __SVR4 // Solaris
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#include <sys/loadavg.h>
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#endif
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#if defined(__linux__)
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#include <sys/prctl.h>
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#endif
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// NOLINTNEXTLINE(misc-unused-using-decls) - required for FD_ZERO
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using std::memset;
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ProcessExecutor::ProcessExecutor(const std::map<std::string, std::size_t> &files, Settings &settings, ErrorLogger &errorLogger)
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: Executor(files, settings, errorLogger)
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{}
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ProcessExecutor::~ProcessExecutor()
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{}
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class PipeWriter : public ErrorLogger {
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public:
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enum PipeSignal {REPORT_OUT='1',REPORT_ERROR='2', REPORT_INFO='3', REPORT_VERIFICATION='4', CHILD_END='5'};
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explicit PipeWriter(int pipe) : mWpipe(pipe) {}
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void reportOut(const std::string &outmsg, Color c) override {
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writeToPipe(REPORT_OUT, ::toString(c) + outmsg + ::toString(Color::Reset));
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}
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void reportErr(const ErrorMessage &msg) override {
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report(msg, MessageType::REPORT_ERROR);
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}
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void reportInfo(const ErrorMessage &msg) override {
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report(msg, MessageType::REPORT_INFO);
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}
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void writeEnd(const std::string& str) {
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writeToPipe(CHILD_END, str);
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}
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private:
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enum class MessageType {REPORT_ERROR, REPORT_INFO};
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void report(const ErrorMessage &msg, MessageType msgType) {
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PipeSignal pipeSignal;
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switch (msgType) {
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case MessageType::REPORT_ERROR:
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pipeSignal = REPORT_ERROR;
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break;
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case MessageType::REPORT_INFO:
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pipeSignal = REPORT_INFO;
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break;
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}
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writeToPipe(pipeSignal, msg.serialize());
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}
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void writeToPipe(PipeSignal type, const std::string &data)
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{
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unsigned int len = static_cast<unsigned int>(data.length() + 1);
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char *out = new char[len + 1 + sizeof(len)];
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out[0] = static_cast<char>(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(mWpipe, out, len + 1 + sizeof(len)) <= 0) {
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delete[] out;
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out = nullptr;
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std::cerr << "#### ThreadExecutor::writeToPipe, Failed to write to pipe" << std::endl;
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std::exit(EXIT_FAILURE);
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}
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delete[] out;
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}
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const int mWpipe;
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};
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int ProcessExecutor::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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if (errno == EAGAIN)
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return 0;
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// need to increment so a missing pipe (i.e. premature exit of forked process) results in an error exitcode
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++result;
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return -1;
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}
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if (type != PipeWriter::REPORT_OUT && type != PipeWriter::REPORT_ERROR && type != PipeWriter::REPORT_INFO && type != PipeWriter::CHILD_END) {
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std::cerr << "#### ThreadExecutor::handleRead error, type was:" << type << std::endl;
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std::exit(EXIT_FAILURE);
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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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std::cerr << "#### ThreadExecutor::handleRead error, type was:" << type << std::endl;
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std::exit(EXIT_FAILURE);
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}
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// Don't rely on incoming data being null-terminated.
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// Allocate +1 element and null-terminate the buffer.
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char *buf = new char[len + 1];
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const ssize_t readIntoBuf = read(rpipe, buf, len);
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if (readIntoBuf <= 0) {
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std::cerr << "#### ThreadExecutor::handleRead error, type was:" << type << std::endl;
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std::exit(EXIT_FAILURE);
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}
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buf[readIntoBuf] = 0;
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if (type == PipeWriter::REPORT_OUT) {
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mErrorLogger.reportOut(buf);
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} else if (type == PipeWriter::REPORT_ERROR || type == PipeWriter::REPORT_INFO) {
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ErrorMessage msg;
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try {
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msg.deserialize(buf);
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} catch (const InternalError& e) {
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std::cerr << "#### ThreadExecutor::handleRead error, internal error:" << e.errorMessage << std::endl;
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std::exit(EXIT_FAILURE);
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}
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if (!mSettings.nomsg.isSuppressed(msg.toSuppressionsErrorMessage())) {
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// Alert only about unique errors
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std::string errmsg = msg.toString(mSettings.verbose);
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if (std::find(mErrorList.begin(), mErrorList.end(), errmsg) == mErrorList.end()) {
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mErrorList.emplace_back(errmsg);
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if (type == PipeWriter::REPORT_ERROR)
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mErrorLogger.reportErr(msg);
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else
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mErrorLogger.reportInfo(msg);
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}
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}
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} else if (type == PipeWriter::CHILD_END) {
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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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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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bool ProcessExecutor::checkLoadAverage(size_t nchildren)
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{
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#if defined(__CYGWIN__) || defined(__QNX__) || defined(__HAIKU__) // getloadavg() is unsupported on Cygwin, Qnx, Haiku.
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(void)nchildren;
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return true;
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#else
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if (!nchildren || !mSettings.loadAverage) {
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return true;
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}
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double sample(0);
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if (getloadavg(&sample, 1) != 1) {
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// disable load average checking on getloadavg error
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return true;
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} else if (sample < mSettings.loadAverage) {
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return true;
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}
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return false;
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#endif
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}
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unsigned int ProcessExecutor::check()
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{
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unsigned int fileCount = 0;
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unsigned int result = 0;
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std::size_t totalfilesize = 0;
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for (std::map<std::string, std::size_t>::const_iterator i = mFiles.begin(); i != mFiles.end(); ++i) {
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totalfilesize += i->second;
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}
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std::list<int> rpipes;
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std::map<pid_t, std::string> childFile;
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std::map<int, std::string> pipeFile;
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std::size_t processedsize = 0;
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std::map<std::string, std::size_t>::const_iterator iFile = mFiles.begin();
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std::list<ImportProject::FileSettings>::const_iterator iFileSettings = mSettings.project.fileSettings.begin();
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for (;;) {
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// Start a new child
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size_t nchildren = childFile.size();
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if ((iFile != mFiles.end() || iFileSettings != mSettings.project.fileSettings.end()) && nchildren < mSettings.jobs && checkLoadAverage(nchildren)) {
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int pipes[2];
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if (pipe(pipes) == -1) {
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std::cerr << "#### ThreadExecutor::check, pipe() failed: "<< std::strerror(errno) << std::endl;
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std::exit(EXIT_FAILURE);
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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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std::cerr << "#### ThreadExecutor::check, fcntl(F_GETFL) failed: "<< std::strerror(errno) << std::endl;
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std::exit(EXIT_FAILURE);
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}
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if (fcntl(pipes[0], F_SETFL, flags | O_NONBLOCK) < 0) {
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std::cerr << "#### ThreadExecutor::check, fcntl(F_SETFL) failed: "<< std::strerror(errno) << std::endl;
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std::exit(EXIT_FAILURE);
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}
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pid_t pid = fork();
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if (pid < 0) {
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// Error
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std::cerr << "#### ThreadExecutor::check, Failed to create child process: "<< std::strerror(errno) << std::endl;
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std::exit(EXIT_FAILURE);
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} else if (pid == 0) {
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#if defined(__linux__)
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prctl(PR_SET_PDEATHSIG, SIGHUP);
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#endif
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close(pipes[0]);
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PipeWriter pipewriter(pipes[1]);
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CppCheck fileChecker(pipewriter, false, CppCheckExecutor::executeCommand);
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fileChecker.settings() = mSettings;
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unsigned int resultOfCheck = 0;
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if (iFileSettings != mSettings.project.fileSettings.end()) {
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resultOfCheck = fileChecker.check(*iFileSettings);
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} else {
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// Read file from a file
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resultOfCheck = fileChecker.check(iFile->first);
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}
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std::ostringstream oss;
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oss << resultOfCheck;
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pipewriter.writeEnd(oss.str());
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std::exit(EXIT_SUCCESS);
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}
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close(pipes[1]);
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rpipes.push_back(pipes[0]);
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if (iFileSettings != mSettings.project.fileSettings.end()) {
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childFile[pid] = iFileSettings->filename + ' ' + iFileSettings->cfg;
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pipeFile[pipes[0]] = iFileSettings->filename + ' ' + iFileSettings->cfg;
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++iFileSettings;
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} else {
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childFile[pid] = iFile->first;
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pipeFile[pipes[0]] = iFile->first;
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++iFile;
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}
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}
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if (!rpipes.empty()) {
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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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struct timeval tv; // for every second polling of load average condition
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tv.tv_sec = 1;
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tv.tv_usec = 0;
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int r = select(*std::max_element(rpipes.begin(), rpipes.end()) + 1, &rfds, nullptr, nullptr, &tv);
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if (r > 0) {
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std::list<int>::iterator rp = rpipes.begin();
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while (rp != rpipes.end()) {
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if (FD_ISSET(*rp, &rfds)) {
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int readRes = handleRead(*rp, result);
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if (readRes == -1) {
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std::size_t size = 0;
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std::map<int, std::string>::iterator p = pipeFile.find(*rp);
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if (p != pipeFile.end()) {
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std::string name = p->second;
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pipeFile.erase(p);
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std::map<std::string, std::size_t>::const_iterator fs = mFiles.find(name);
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if (fs != mFiles.end()) {
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size = fs->second;
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}
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}
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fileCount++;
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processedsize += size;
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if (!mSettings.quiet)
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CppCheckExecutor::reportStatus(fileCount, mFiles.size() + mSettings.project.fileSettings.size(), processedsize, totalfilesize);
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close(*rp);
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rp = rpipes.erase(rp);
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} else
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++rp;
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} else
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++rp;
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}
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}
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}
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if (!childFile.empty()) {
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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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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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childname = c->second;
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childFile.erase(c);
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}
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if (WIFEXITED(stat)) {
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const int exitstatus = WEXITSTATUS(stat);
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if (exitstatus != EXIT_SUCCESS) {
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std::ostringstream oss;
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oss << "Child process exited with " << exitstatus;
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reportInternalChildErr(childname, oss.str());
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}
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} else if (WIFSIGNALED(stat)) {
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std::ostringstream oss;
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oss << "Child process crashed with signal " << WTERMSIG(stat);
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reportInternalChildErr(childname, oss.str());
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}
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}
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}
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if (iFile == mFiles.end() && iFileSettings == mSettings.project.fileSettings.end() && rpipes.empty() && childFile.empty()) {
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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 ProcessExecutor::reportInternalChildErr(const std::string &childname, const std::string &msg)
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{
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std::list<ErrorMessage::FileLocation> locations;
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locations.emplace_back(childname, 0, 0);
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const ErrorMessage errmsg(locations,
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emptyString,
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Severity::error,
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"Internal error: " + msg,
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"cppcheckError",
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Certainty::normal);
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if (!mSettings.nomsg.isSuppressed(errmsg.toSuppressionsErrorMessage()))
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mErrorLogger.reportErr(errmsg);
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}
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#endif // !WIN32
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