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/* -*- C++ -*-
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2025 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 checkexceptionsafetyH
#define checkexceptionsafetyH
//---------------------------------------------------------------------------
#include "check.h"
#include "config.h"
#include <string>
class Settings;
class ErrorLogger;
class Token;
class Tokenizer;
/// @addtogroup Checks
/// @{
/**
* @brief %Check exception safety (exceptions shouldn't cause leaks nor corrupt data)
*
* The problem with these checks is that Cppcheck can't determine what the valid
* values are for variables. But in some cases (dead pointers) it can be determined
* that certain variable values are corrupt.
*/
class CPPCHECKLIB CheckExceptionSafety : public Check {
public:
/** This constructor is used when registering the CheckClass */
CheckExceptionSafety() : Check(myName()) {}
private:
/** This constructor is used when running checks. */
CheckExceptionSafety(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
: Check(myName(), tokenizer, settings, errorLogger) {}
void runChecks(const Tokenizer &tokenizer, ErrorLogger *errorLogger) override;
/** Don't throw exceptions in destructors */
void destructors();
/** deallocating memory and then throw (dead pointer) */
void deallocThrow();
/** Don't rethrow a copy of the caught exception; use a bare throw instead */
void checkRethrowCopy();
/** @brief %Check for exceptions that are caught by value instead of by reference */
void checkCatchExceptionByValue();
/** @brief %Check for functions that throw that shouldn't */
void nothrowThrows();
/** @brief %Check for unhandled exception specification */
void unhandledExceptionSpecification();
/** @brief %Check for rethrow not from catch scope */
void rethrowNoCurrentException();
/** Don't throw exceptions in destructors */
void destructorsError(const Token * tok, const std::string &className);
void deallocThrowError(const Token * tok, const std::string &varname);
void rethrowCopyError(const Token * tok, const std::string &varname);
void catchExceptionByValueError(const Token *tok);
void noexceptThrowError(const Token * tok);
/** Missing exception specification */
void unhandledExceptionSpecificationError(const Token * tok1, const Token * tok2, const std::string & funcname);
/** Rethrow without currently handled exception */
void rethrowNoCurrentExceptionError(const Token *tok);
/** Generate all possible errors (for --errorlist) */
void getErrorMessages(ErrorLogger *errorLogger, const Settings *settings) const override;
/** Short description of class (for --doc) */
static std::string myName() {
return "Exception Safety";
}
/** wiki formatted description of the class (for --doc) */
std::string classInfo() const override {
return "Checking exception safety\n"
"- Throwing exceptions in destructors\n"
"- Throwing exception during invalid state\n"
"- Throwing a copy of a caught exception instead of rethrowing the original exception\n"
"- Exception caught by value instead of by reference\n"
"- Throwing exception in noexcept, nothrow(), __attribute__((nothrow)) or __declspec(nothrow) function\n"
"- Unhandled exception specification when calling function foo()\n"
"- Rethrow without currently handled exception\n";
}
};
/// @}
//---------------------------------------------------------------------------
#endif // checkexceptionsafetyH
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