296 lines
11 KiB
C++
296 lines
11 KiB
C++
/*
|
|
* Cppcheck - A tool for static C/C++ code analysis
|
|
* Copyright (C) 2007-2010 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 CheckOtherH
|
|
#define CheckOtherH
|
|
//---------------------------------------------------------------------------
|
|
|
|
#include "check.h"
|
|
#include "settings.h"
|
|
|
|
class Token;
|
|
|
|
/// @addtogroup Checks
|
|
/// @{
|
|
|
|
|
|
/** @brief Various small checks */
|
|
|
|
class CheckOther : public Check
|
|
{
|
|
public:
|
|
/** @brief This constructor is used when registering the CheckClass */
|
|
CheckOther() : Check()
|
|
{ }
|
|
|
|
/** @brief This constructor is used when running checks. */
|
|
CheckOther(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
|
|
: Check(tokenizer, settings, errorLogger)
|
|
{ }
|
|
|
|
/** @brief Run checks against the normal token list */
|
|
void runChecks(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
|
|
{
|
|
CheckOther checkOther(tokenizer, settings, errorLogger);
|
|
|
|
// Coding style checks
|
|
checkOther.warningOldStylePointerCast();
|
|
checkOther.checkUnsignedDivision();
|
|
checkOther.checkCharVariable();
|
|
checkOther.functionVariableUsage();
|
|
checkOther.checkVariableScope();
|
|
checkOther.checkStructMemberUsage();
|
|
checkOther.strPlusChar();
|
|
checkOther.sizeofsizeof();
|
|
checkOther.sizeofCalculation();
|
|
checkOther.checkRedundantAssignmentInSwitch();
|
|
checkOther.checkAssignmentInAssert();
|
|
}
|
|
|
|
/** @brief Run checks against the simplified token list */
|
|
void runSimplifiedChecks(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
|
|
{
|
|
CheckOther checkOther(tokenizer, settings, errorLogger);
|
|
|
|
// Coding style checks
|
|
checkOther.checkConstantFunctionParameter();
|
|
checkOther.checkIncompleteStatement();
|
|
|
|
checkOther.invalidFunctionUsage();
|
|
checkOther.checkZeroDivision();
|
|
checkOther.checkMathFunctions();
|
|
checkOther.checkFflushOnInputStream();
|
|
checkOther.invalidScanf();
|
|
|
|
checkOther.checkSelfAssignment();
|
|
checkOther.checkIncorrectLogicOperator();
|
|
checkOther.checkMisusedScopedObject();
|
|
}
|
|
|
|
/** @brief Are there C-style pointer casts in a c++ file? */
|
|
void warningOldStylePointerCast();
|
|
|
|
/**
|
|
* @brief Invalid function usage (invalid radix / overlapping data)
|
|
*
|
|
* %Check that given function parameters are valid according to the standard
|
|
* - wrong radix given for strtol/strtoul
|
|
* - overlapping data when using sprintf/snprintf
|
|
*/
|
|
void invalidFunctionUsage();
|
|
|
|
/** @brief %Check for unsigned division */
|
|
void checkUnsignedDivision();
|
|
|
|
/** @brief %Check for unused function variables */
|
|
void functionVariableUsage();
|
|
void unusedVariableError(const Token *tok, const std::string &varname);
|
|
void allocatedButUnusedVariableError(const Token *tok, const std::string &varname);
|
|
void unreadVariableError(const Token *tok, const std::string &varname);
|
|
void unassignedVariableError(const Token *tok, const std::string &varname);
|
|
|
|
/** @brief %Check scope of variables */
|
|
void checkVariableScope();
|
|
|
|
/** @brief %Check for constant function parameter */
|
|
void checkConstantFunctionParameter();
|
|
|
|
/** @brief %Check that all struct members are used */
|
|
void checkStructMemberUsage();
|
|
|
|
/** @brief Using char variable as array index / as operand in bit operation */
|
|
void checkCharVariable();
|
|
|
|
/** @brief Incomplete statement. A statement that only contains a constant or variable */
|
|
void checkIncompleteStatement();
|
|
|
|
/** @brief str plus char (unusual pointer arithmetic) */
|
|
void strPlusChar();
|
|
|
|
/** @brief %Check zero division*/
|
|
void checkZeroDivision();
|
|
|
|
/** @brief %Check for parameters given to math function that do not make sense*/
|
|
void checkMathFunctions();
|
|
|
|
void lookupVar(const Token *tok1, const std::string &varname);
|
|
|
|
/** @brief %Check for using fflush() on an input stream*/
|
|
void checkFflushOnInputStream();
|
|
|
|
/** @brief %Check for 'sizeof sizeof ..' */
|
|
void sizeofsizeof();
|
|
void sizeofsizeofError(const Token *tok);
|
|
|
|
/** @brief %Check for calculations inside sizeof */
|
|
void sizeofCalculation();
|
|
void sizeofCalculationError(const Token *tok);
|
|
|
|
/** @brief scanf can crash if width specifiers are not used */
|
|
void invalidScanf();
|
|
void invalidScanfError(const Token *tok);
|
|
|
|
/** @brief %Check for assigning to the same variable twice in a switch statement*/
|
|
void checkRedundantAssignmentInSwitch();
|
|
|
|
/** @brief %Check for assigning a variable to itself*/
|
|
void checkSelfAssignment();
|
|
|
|
/** @brief %Check for assignment to a variable in an assert test*/
|
|
void checkAssignmentInAssert();
|
|
|
|
/** @brief %Check for testing for mutual exclusion over ||*/
|
|
void checkIncorrectLogicOperator();
|
|
|
|
/** @brief %Check for objects that are destroyed immediately */
|
|
void checkMisusedScopedObject();
|
|
|
|
// Error messages..
|
|
void cstyleCastError(const Token *tok);
|
|
void dangerousUsageStrtolError(const Token *tok);
|
|
void sprintfOverlappingDataError(const Token *tok, const std::string &varname);
|
|
void udivError(const Token *tok);
|
|
void unusedStructMemberError(const Token *tok, const std::string &structname, const std::string &varname);
|
|
void passedByValueError(const Token *tok, const std::string &parname);
|
|
void constStatementError(const Token *tok, const std::string &type);
|
|
void charArrayIndexError(const Token *tok);
|
|
void charBitOpError(const Token *tok);
|
|
void variableScopeError(const Token *tok, const std::string &varname);
|
|
void conditionAlwaysTrueFalse(const Token *tok, const std::string &truefalse);
|
|
void strPlusChar(const Token *tok);
|
|
void zerodivError(const Token *tok);
|
|
void mathfunctionCallError(const Token *tok, const unsigned int numParam = 1);
|
|
void fflushOnInputStreamError(const Token *tok, const std::string &varname);
|
|
void redundantAssignmentInSwitchError(const Token *tok, const std::string &varname);
|
|
void selfAssignmentError(const Token *tok, const std::string &varname);
|
|
void assignmentInAssertError(const Token *tok, const std::string &varname);
|
|
void incorrectLogicOperatorError(const Token *tok);
|
|
void misusedScopeObjectError(const Token *tok, const std::string &varname);
|
|
|
|
void getErrorMessages()
|
|
{
|
|
// error
|
|
sprintfOverlappingDataError(0, "varname");
|
|
udivError(0);
|
|
zerodivError(0);
|
|
mathfunctionCallError(0);
|
|
fflushOnInputStreamError(0, "stdin");
|
|
misusedScopeObjectError(NULL, "varname");
|
|
|
|
// style/warning
|
|
cstyleCastError(0);
|
|
dangerousUsageStrtolError(0);
|
|
unusedStructMemberError(0, "structname", "variable");
|
|
passedByValueError(0, "parametername");
|
|
constStatementError(0, "type");
|
|
charArrayIndexError(0);
|
|
charBitOpError(0);
|
|
variableScopeError(0, "varname");
|
|
conditionAlwaysTrueFalse(0, "true/false");
|
|
strPlusChar(0);
|
|
sizeofsizeofError(0);
|
|
sizeofCalculationError(0);
|
|
redundantAssignmentInSwitchError(0, "varname");
|
|
selfAssignmentError(0, "varname");
|
|
assignmentInAssertError(0, "varname");
|
|
invalidScanfError(0);
|
|
incorrectLogicOperatorError(0);
|
|
unusedVariableError(0, "varname");
|
|
allocatedButUnusedVariableError(0, "varname");
|
|
unreadVariableError(0, "varname");
|
|
unassignedVariableError(0, "varname");
|
|
}
|
|
|
|
std::string name() const
|
|
{
|
|
return "Other";
|
|
}
|
|
|
|
std::string classInfo() const
|
|
{
|
|
return "Other checks\n"
|
|
|
|
// error
|
|
"* [[OverlappingData|bad usage of the function 'sprintf' (overlapping data)]]\n"
|
|
"* division with zero\n"
|
|
"* using fflush() on an input stream\n"
|
|
"* scoped object destroyed immediately after construction\n"
|
|
"* assignment in an assert statement\n"
|
|
|
|
// style
|
|
"* C-style pointer cast in cpp file\n"
|
|
"* redundant if\n"
|
|
"* bad usage of the function 'strtol'\n"
|
|
"* [[CheckUnsignedDivision|unsigned division]]\n"
|
|
"* Dangerous usage of 'scanf'\n"
|
|
"* unused struct member\n"
|
|
"* passing parameter by value\n"
|
|
"* [[IncompleteStatement|Incomplete statement]]\n"
|
|
"* [[charvar|check how signed char variables are used]]\n"
|
|
"* variable scope can be limited\n"
|
|
"* condition that is always true/false\n"
|
|
"* unusal pointer arithmetic. For example: \"abc\" + 'd'\n"
|
|
"* redundant assignment in a switch statement\n"
|
|
"* look for 'sizeof sizeof ..'\n"
|
|
"* look for calculations inside sizeof()\n"
|
|
"* assignment of a variable to itself\n"
|
|
"* mutual exclusion over || always evaluating to true\n"
|
|
|
|
// optimisations
|
|
"* optimisation: detect post increment/decrement\n";
|
|
}
|
|
|
|
private:
|
|
|
|
/**
|
|
* @brief Used in warningRedundantCode()
|
|
* Iterates through the %var% tokens in a fully qualified name and concatenates them.
|
|
*/
|
|
std::string concatNames(const Token **tok) const
|
|
{
|
|
std::string varname;
|
|
while (Token::Match(*tok, "%var% ::|."))
|
|
{
|
|
varname.append((*tok)->str());
|
|
varname.append((*tok)->next()->str());
|
|
*tok = (*tok)->tokAt(2);
|
|
}
|
|
|
|
if (Token::Match(*tok, "%var%"))
|
|
varname.append((*tok)->str());
|
|
|
|
return varname;
|
|
}
|
|
|
|
/**
|
|
* @brief query type of identifier
|
|
* @param tok Token of the identifier
|
|
* @return true if the identifier is of type 'class' or 'struct',
|
|
* false otherwise.
|
|
*/
|
|
bool isIdentifierObjectType(const Token* const tok);
|
|
|
|
std::map<std::string, bool> isClassResults;
|
|
};
|
|
/// @}
|
|
//---------------------------------------------------------------------------
|
|
#endif
|
|
|