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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2012 Daniel Marjamäki and Cppcheck team.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
//---------------------------------------------------------------------------
#ifndef checkleakautovarH
#define checkleakautovarH
//---------------------------------------------------------------------------
#include "config.h"
#include "check.h"
class CPPCHECKLIB VarInfo {
public:
std::map<unsigned int, std::string> alloctype;
std::map<unsigned int, std::string> possibleUsage;
std::set<unsigned int> conditionalAlloc;
void clear() {
alloctype.clear();
possibleUsage.clear();
conditionalAlloc.clear();
}
void erase(unsigned int varid) {
alloctype.erase(varid);
possibleUsage.erase(varid);
conditionalAlloc.erase(varid);
}
void swap(VarInfo &other) {
alloctype.swap(other.alloctype);
possibleUsage.swap(other.possibleUsage);
conditionalAlloc.swap(other.conditionalAlloc);
}
/** set possible usage for all variables */
void possibleUsageAll(const std::string &functionName);
void print();
};
/// @addtogroup Checks
/// @{
/**
* @brief Check for leaks
*/
class CPPCHECKLIB CheckLeakAutoVar : public Check {
public:
/** This constructor is used when registering the CheckLeakAutoVar */
CheckLeakAutoVar() : Check(myName()) {
}
/** This constructor is used when running checks. */
CheckLeakAutoVar(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
: Check(myName(), tokenizer, settings, errorLogger) {
}
/** @brief Run checks against the simplified token list */
void runSimplifiedChecks(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger) {
CheckLeakAutoVar checkLeakAutoVar(tokenizer, settings, errorLogger);
checkLeakAutoVar.parseConfigurationFile("cppcheck.cfg");
checkLeakAutoVar.check();
}
private:
std::map<std::string,std::string> cfgalloc;
std::map<std::string,std::string> cfgdealloc;
std::set<std::string> cfgignore;
std::set<std::string> cfguse;
std::set<std::string> cfgnoreturn;
void parseConfigurationFile(const std::string &filename);
/** check for leaks in all scopes */
void check();
/** check for leaks in a function scope */
void checkScope(const Token * const startToken,
VarInfo *varInfo,
std::set<unsigned int> notzero);
/** parse function call */
void functionCall(const Token *tok, VarInfo *varInfo, const std::string &dealloc);
/** return. either "return" or end of variable scope is seen */
void ret(const Token *tok, const VarInfo &varInfo);
/** if variable is allocated then there is a leak */
void leakIfAllocated(const Token *vartok, const VarInfo &varInfo);
void leakError(const Token* tok, const std::string &varname);
void mismatchError(const Token* tok, const std::string &varname);
void deallocUseError(const Token *tok, const std::string &varname);
void deallocReturnError(const Token *tok, const std::string &varname);
/** message: user configuration is needed to complete analysis */
void configurationInfo(const Token* tok, const std::string &functionName);
void getErrorMessages(ErrorLogger *errorLogger, const Settings *settings) const {
CheckLeakAutoVar c(0, settings, errorLogger);
c.deallocReturnError(0, "p");
c.configurationInfo(0, "f"); // user configuration is needed to complete analysis
}
static std::string myName() {
return "Leaks (auto variables)";
}
std::string classInfo() const {
return "Detect when a auto variable is allocated but not deallocated.";
}
};
/// @}
//---------------------------------------------------------------------------
#endif
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