139 lines
5.2 KiB
C++
139 lines
5.2 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2023 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 checksizeofH
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#define checksizeofH
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//---------------------------------------------------------------------------
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#include "check.h"
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#include "config.h"
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#include "tokenize.h"
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#include <string>
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class ErrorLogger;
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class Settings;
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class Token;
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/// @addtogroup Checks
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/// @{
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/** @brief checks on usage of sizeof() operator */
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class CPPCHECKLIB CheckSizeof : public Check {
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public:
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/** @brief This constructor is used when registering the CheckClass */
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CheckSizeof() : Check(myName()) {}
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private:
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/** @brief This constructor is used when running checks. */
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CheckSizeof(const Tokenizer* tokenizer, const Settings* settings, ErrorLogger* errorLogger)
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: Check(myName(), tokenizer, settings, errorLogger) {}
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/** @brief Run checks against the normal token list */
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void runChecks(const Tokenizer& tokenizer, ErrorLogger* errorLogger) override {
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CheckSizeof checkSizeof(&tokenizer, tokenizer.getSettings(), errorLogger);
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// Checks
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checkSizeof.sizeofsizeof();
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checkSizeof.sizeofCalculation();
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checkSizeof.sizeofFunction();
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checkSizeof.suspiciousSizeofCalculation();
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checkSizeof.checkSizeofForArrayParameter();
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checkSizeof.checkSizeofForPointerSize();
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checkSizeof.checkSizeofForNumericParameter();
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checkSizeof.sizeofVoid();
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}
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/** @brief %Check for 'sizeof sizeof ..' */
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void sizeofsizeof();
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/** @brief %Check for calculations inside sizeof */
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void sizeofCalculation();
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/** @brief %Check for function call inside sizeof */
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void sizeofFunction();
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/** @brief %Check for suspicious calculations with sizeof results */
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void suspiciousSizeofCalculation();
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/** @brief %Check for using sizeof with array given as function argument */
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void checkSizeofForArrayParameter();
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/** @brief %Check for using sizeof of a variable when allocating it */
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void checkSizeofForPointerSize();
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/** @brief %Check for using sizeof with numeric given as function argument */
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void checkSizeofForNumericParameter();
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/** @brief %Check for using sizeof(void) */
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void sizeofVoid();
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// Error messages..
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void sizeofsizeofError(const Token* tok);
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void sizeofCalculationError(const Token* tok, bool inconclusive);
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void sizeofFunctionError(const Token* tok);
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void multiplySizeofError(const Token* tok);
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void divideSizeofError(const Token* tok);
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void sizeofForArrayParameterError(const Token* tok);
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void sizeofForPointerError(const Token* tok, const std::string &varname);
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void divideBySizeofError(const Token* tok, const std::string &memfunc);
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void sizeofForNumericParameterError(const Token* tok);
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void sizeofVoidError(const Token *tok);
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void sizeofDereferencedVoidPointerError(const Token *tok, const std::string &varname);
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void arithOperationsOnVoidPointerError(const Token* tok, const std::string &varname, const std::string &vartype);
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void getErrorMessages(ErrorLogger* errorLogger, const Settings* settings) const override {
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CheckSizeof c(nullptr, settings, errorLogger);
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c.sizeofForArrayParameterError(nullptr);
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c.sizeofForPointerError(nullptr, "varname");
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c.divideBySizeofError(nullptr, "memset");
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c.sizeofForNumericParameterError(nullptr);
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c.sizeofsizeofError(nullptr);
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c.sizeofCalculationError(nullptr, false);
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c.sizeofFunctionError(nullptr);
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c.multiplySizeofError(nullptr);
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c.divideSizeofError(nullptr);
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c.sizeofVoidError(nullptr);
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c.sizeofDereferencedVoidPointerError(nullptr, "varname");
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c.arithOperationsOnVoidPointerError(nullptr, "varname", "vartype");
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}
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static std::string myName() {
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return "Sizeof";
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}
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std::string classInfo() const override {
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return "sizeof() usage checks\n"
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"- sizeof for array given as function argument\n"
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"- sizeof for numeric given as function argument\n"
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"- using sizeof(pointer) instead of the size of pointed data\n"
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"- look for 'sizeof sizeof ..'\n"
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"- look for calculations inside sizeof()\n"
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"- look for function calls inside sizeof()\n"
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"- look for suspicious calculations with sizeof()\n"
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"- using 'sizeof(void)' which is undefined\n";
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}
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};
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/// @}
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//---------------------------------------------------------------------------
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#endif // checksizeofH
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