113 lines
4.6 KiB
C++
113 lines
4.6 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2014 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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//---------------------------------------------------------------------------
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#ifndef checkuninitvarH
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#define checkuninitvarH
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//---------------------------------------------------------------------------
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#include "config.h"
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#include "check.h"
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#include "settings.h"
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class Token;
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class Scope;
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class Variable;
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/// @addtogroup Checks
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/// @{
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/** @brief Checking for uninitialized variables */
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class CPPCHECKLIB CheckUninitVar : public Check {
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public:
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/** @brief This constructor is used when registering the CheckUninitVar */
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CheckUninitVar() : Check(myName()), testrunner(false) {
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}
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/** @brief This constructor is used when running checks. */
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CheckUninitVar(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
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: Check(myName(), tokenizer, settings, errorLogger), testrunner(false) {
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}
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/** @brief Run checks against the simplified token list */
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void runSimplifiedChecks(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger) {
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CheckUninitVar checkUninitVar(tokenizer, settings, errorLogger);
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checkUninitVar.executionPaths();
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checkUninitVar.check();
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}
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/** Check for uninitialized variables */
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void check();
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void checkScope(const Scope* scope);
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void checkStruct(const Scope* scope, const Token *tok, const Variable &structvar);
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bool checkScopeForVariable(const Scope* scope, const Token *tok, const Variable& var, bool * const possibleInit, bool * const noreturn, bool * const alloc, const std::string &membervar);
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bool checkIfForWhileHead(const Token *startparentheses, const Variable& var, bool suppressErrors, bool isuninit, bool alloc, const std::string &membervar);
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bool checkLoopBody(const Token *tok, const Variable& var, const bool alloc, const std::string &membervar, const bool suppressErrors);
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void checkRhs(const Token *tok, const Variable &var, bool alloc, const std::string &membervar);
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static bool isVariableUsage(const Token *vartok, bool ispointer, bool alloc, bool cpp);
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static bool isMemberVariableAssignment(const Token *tok, const std::string &membervar);
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bool isMemberVariableUsage(const Token *tok, bool isPointer, bool alloc, const std::string &membervar) const;
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/**
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* @brief Uninitialized variables: analyse functions to see how they work with uninitialized variables
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* @param tokens [in] the token list
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* @param func [out] names of functions that don't handle uninitialized variables well. the function names are added to the set. No clearing is made.
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*/
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void analyse(const Token * tokens, std::set<std::string> &func) const;
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/** Save analysis results */
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void saveAnalysisData(const std::set<std::string> &data) const;
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/** @brief new type of check: check execution paths */
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void executionPaths();
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void uninitstringError(const Token *tok, const std::string &varname, bool strncpy_);
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void uninitdataError(const Token *tok, const std::string &varname);
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void uninitvarError(const Token *tok, const std::string &varname);
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void uninitStructMemberError(const Token *tok, const std::string &membername);
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/** testrunner: (don't abort() when assertion fails, just write error message) */
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bool testrunner;
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private:
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void getErrorMessages(ErrorLogger *errorLogger, const Settings *settings) const {
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CheckUninitVar c(0, settings, errorLogger);
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// error
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c.uninitstringError(0, "varname", true);
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c.uninitdataError(0, "varname");
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c.uninitvarError(0, "varname");
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c.uninitStructMemberError(0, "a.b");
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}
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static std::string myName() {
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return "Uninitialized variables";
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}
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std::string classInfo() const {
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return "Uninitialized variables\n"
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"* using uninitialized variables and data\n";
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}
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};
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/// @}
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//---------------------------------------------------------------------------
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#endif // checkuninitvarH
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