185 lines
8.2 KiB
C++
185 lines
8.2 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2019 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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//---------------------------------------------------------------------------
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#ifndef checkioH
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#define checkioH
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//---------------------------------------------------------------------------
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#include "check.h"
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#include "config.h"
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#include "errortypes.h"
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#include "utils.h"
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#include <ostream>
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#include <string>
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class Function;
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class Settings;
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class Token;
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class Tokenizer;
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class Variable;
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class ErrorLogger;
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/// @addtogroup Checks
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/// @{
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/** @brief %Check input output operations. */
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class CPPCHECKLIB CheckIO : public Check {
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public:
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/** @brief This constructor is used when registering CheckIO */
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CheckIO() : Check(myName()) {
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}
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/** @brief This constructor is used when running checks. */
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CheckIO(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
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: Check(myName(), tokenizer, settings, errorLogger) {
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}
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/** @brief Run checks on the normal token list */
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void runChecks(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger) OVERRIDE {
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CheckIO checkIO(tokenizer, settings, errorLogger);
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checkIO.checkWrongPrintfScanfArguments();
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checkIO.checkCoutCerrMisusage();
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checkIO.checkFileUsage();
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checkIO.invalidScanf();
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}
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/** @brief %Check for missusage of std::cout */
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void checkCoutCerrMisusage();
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/** @brief %Check usage of files*/
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void checkFileUsage();
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/** @brief scanf can crash if width specifiers are not used */
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void invalidScanf();
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/** @brief %Checks type and number of arguments given to functions like printf or scanf*/
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void checkWrongPrintfScanfArguments();
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private:
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class ArgumentInfo {
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public:
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ArgumentInfo(const Token *arg, const Settings *settings, bool _isCPP);
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~ArgumentInfo();
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bool isArrayOrPointer() const;
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bool isComplexType() const;
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bool isKnownType() const;
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bool isStdVectorOrString();
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bool isStdContainer(const Token *tok);
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bool isLibraryType(const Settings *settings) const;
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const Variable *variableInfo;
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const Token *typeToken;
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const Function *functionInfo;
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Token *tempToken;
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bool element;
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bool _template;
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bool address;
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bool isCPP;
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private:
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ArgumentInfo(const ArgumentInfo &); // not implemented
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ArgumentInfo operator = (const ArgumentInfo &); // not implemented
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};
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void checkFormatString(const Token * const tok,
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const Token * const formatStringTok,
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const Token * argListTok,
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const bool scan,
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const bool scanf_s);
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// Reporting errors..
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void coutCerrMisusageError(const Token* tok, const std::string& streamName);
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void fflushOnInputStreamError(const Token *tok, const std::string &varname);
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void ioWithoutPositioningError(const Token *tok);
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void readWriteOnlyFileError(const Token *tok);
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void writeReadOnlyFileError(const Token *tok);
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void useClosedFileError(const Token *tok);
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void seekOnAppendedFileError(const Token *tok);
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void invalidScanfError(const Token *tok);
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void wrongPrintfScanfArgumentsError(const Token* tok,
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const std::string &functionName,
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nonneg int numFormat,
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nonneg int numFunction);
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void wrongPrintfScanfPosixParameterPositionError(const Token* tok, const std::string& functionName,
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nonneg int index, nonneg int numFunction);
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void invalidScanfArgTypeError_s(const Token* tok, nonneg int numFormat, const std::string& specifier, const ArgumentInfo* argInfo);
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void invalidScanfArgTypeError_int(const Token* tok, nonneg int numFormat, const std::string& specifier, const ArgumentInfo* argInfo, bool isUnsigned);
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void invalidScanfArgTypeError_float(const Token* tok, nonneg int numFormat, const std::string& specifier, const ArgumentInfo* argInfo);
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void invalidPrintfArgTypeError_s(const Token* tok, nonneg int numFormat, const ArgumentInfo* argInfo);
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void invalidPrintfArgTypeError_n(const Token* tok, nonneg int numFormat, const ArgumentInfo* argInfo);
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void invalidPrintfArgTypeError_p(const Token* tok, nonneg int numFormat, const ArgumentInfo* argInfo);
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void invalidPrintfArgTypeError_uint(const Token* tok, nonneg int numFormat, const std::string& specifier, const ArgumentInfo* argInfo);
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void invalidPrintfArgTypeError_sint(const Token* tok, nonneg int numFormat, const std::string& specifier, const ArgumentInfo* argInfo);
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void invalidPrintfArgTypeError_float(const Token* tok, nonneg int numFormat, const std::string& specifier, const ArgumentInfo* argInfo);
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void invalidLengthModifierError(const Token* tok, nonneg int numFormat, const std::string& modifier);
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void invalidScanfFormatWidthError(const Token* tok, nonneg int numFormat, int width, const Variable *var, char c);
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static void argumentType(std::ostream & os, const ArgumentInfo * argInfo);
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static Severity::SeverityType getSeverity(const ArgumentInfo *argInfo);
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void getErrorMessages(ErrorLogger *errorLogger, const Settings *settings) const OVERRIDE {
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CheckIO c(nullptr, settings, errorLogger);
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c.coutCerrMisusageError(nullptr, "cout");
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c.fflushOnInputStreamError(nullptr, "stdin");
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c.ioWithoutPositioningError(nullptr);
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c.readWriteOnlyFileError(nullptr);
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c.writeReadOnlyFileError(nullptr);
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c.useClosedFileError(nullptr);
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c.seekOnAppendedFileError(nullptr);
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c.invalidScanfError(nullptr);
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c.wrongPrintfScanfArgumentsError(nullptr, "printf",3,2);
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c.invalidScanfArgTypeError_s(nullptr, 1, "s", nullptr);
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c.invalidScanfArgTypeError_int(nullptr, 1, "d", nullptr, false);
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c.invalidScanfArgTypeError_float(nullptr, 1, "f", nullptr);
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c.invalidPrintfArgTypeError_s(nullptr, 1, nullptr);
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c.invalidPrintfArgTypeError_n(nullptr, 1, nullptr);
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c.invalidPrintfArgTypeError_p(nullptr, 1, nullptr);
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c.invalidPrintfArgTypeError_uint(nullptr, 1, "u", nullptr);
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c.invalidPrintfArgTypeError_sint(nullptr, 1, "i", nullptr);
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c.invalidPrintfArgTypeError_float(nullptr, 1, "f", nullptr);
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c.invalidLengthModifierError(nullptr, 1, "I");
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c.invalidScanfFormatWidthError(nullptr, 10, 5, nullptr, 's');
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c.invalidScanfFormatWidthError(nullptr, 99, -1, nullptr, 's');
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c.wrongPrintfScanfPosixParameterPositionError(nullptr, "printf", 2, 1);
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}
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static std::string myName() {
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return "IO using format string";
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}
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std::string classInfo() const OVERRIDE {
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return "Check format string input/output operations.\n"
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"- Bad usage of the function 'sprintf' (overlapping data)\n"
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"- Missing or wrong width specifiers in 'scanf' format string\n"
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"- Use a file that has been closed\n"
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"- File input/output without positioning results in undefined behaviour\n"
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"- Read to a file that has only been opened for writing (or vice versa)\n"
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"- Repositioning operation on a file opened in append mode\n"
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"- Using fflush() on an input stream\n"
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"- Invalid usage of output stream. For example: 'std::cout << std::cout;'\n"
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"- Wrong number of arguments given to 'printf' or 'scanf;'\n";
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}
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};
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/// @}
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//---------------------------------------------------------------------------
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#endif // checkioH
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