310 lines
11 KiB
C++
310 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);
|
|
|
|
checkOther.nullPointer();
|
|
|
|
// Coding style checks
|
|
checkOther.warningOldStylePointerCast();
|
|
checkOther.checkUnsignedDivision();
|
|
checkOther.checkCharVariable();
|
|
checkOther.functionVariableUsage();
|
|
checkOther.checkVariableScope();
|
|
checkOther.checkStructMemberUsage();
|
|
checkOther.strPlusChar();
|
|
}
|
|
|
|
/** @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.warningRedundantCode();
|
|
checkOther.checkConstantFunctionParameter();
|
|
checkOther.checkIncompleteStatement();
|
|
checkOther.checkEmptyStringTest();
|
|
checkOther.postIncrement();
|
|
|
|
checkOther.invalidFunctionUsage();
|
|
checkOther.checkZeroDivision();
|
|
checkOther.checkMathFunctions();
|
|
|
|
// New type of check: Check execution paths
|
|
checkOther.executionPaths();
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Uninitialized variables: analyse functions to see how they work with uninitialized variables
|
|
* @param tokens [in] the token list
|
|
* @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.
|
|
* @param showAll [in] enable --all checking
|
|
*/
|
|
static void analyseFunctions(const Token * const tokens, std::set<std::string> &func, bool showAll);
|
|
|
|
/** @brief Are there C-style pointer casts in a c++ file? */
|
|
void warningOldStylePointerCast();
|
|
|
|
/** @brief Redundant code: if (p) delete p; */
|
|
void warningRedundantCode();
|
|
|
|
/**
|
|
* @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 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 possible null pointer dereference */
|
|
void nullPointer();
|
|
|
|
/** @brief new type of check: check execution paths */
|
|
void executionPaths();
|
|
|
|
/** @brief %Check zero division*/
|
|
void checkZeroDivision();
|
|
|
|
/** @brief %Check for parameters given to math function that do not make sense*/
|
|
void checkMathFunctions();
|
|
|
|
/** @brief %Check for post increment/decrement in for loop*/
|
|
void postIncrement();
|
|
|
|
void lookupVar(const Token *tok1, const std::string &varname);
|
|
|
|
// Redundant condition
|
|
// if (haystack.find(needle) != haystack.end())
|
|
// haystack.remove(needle);
|
|
void redundantCondition2();
|
|
|
|
/** @brief %Check for inefficient empty string test*/
|
|
void checkEmptyStringTest();
|
|
|
|
// Error messages..
|
|
void cstyleCastError(const Token *tok);
|
|
void redundantIfDelete0Error(const Token *tok);
|
|
void redundantIfRemoveError(const Token *tok);
|
|
void dangerousUsageStrtolError(const Token *tok);
|
|
void sprintfOverlappingDataError(const Token *tok, const std::string &varname);
|
|
void udivError(const Token *tok);
|
|
void udivWarning(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 nullPointerError(const Token *tok); // variable name unknown / doesn't exist
|
|
void nullPointerError(const Token *tok, const std::string &varname);
|
|
void nullPointerError(const Token *tok, const std::string &varname, const int line);
|
|
void uninitstringError(const Token *tok, const std::string &varname);
|
|
void uninitdataError(const Token *tok, const std::string &varname);
|
|
void uninitvarError(const Token *tok, const std::string &varname);
|
|
void zerodivError(const Token *tok);
|
|
void mathfunctionCallError(const Token *tok, const unsigned int numParam = 1);
|
|
void postIncrementError(const Token *tok, const std::string &var_name, const bool isIncrement);
|
|
void emptyStringTestError(const Token *tok, const std::string &var_name, const bool isTestForEmpty);
|
|
|
|
void getErrorMessages()
|
|
{
|
|
// error
|
|
sprintfOverlappingDataError(0, "varname");
|
|
udivError(0);
|
|
nullPointerError(0, "pointer");
|
|
uninitstringError(0, "varname");
|
|
uninitdataError(0, "varname");
|
|
uninitvarError(0, "varname");
|
|
zerodivError(0);
|
|
mathfunctionCallError(0);
|
|
|
|
// style
|
|
cstyleCastError(0);
|
|
redundantIfDelete0Error(0);
|
|
redundantIfRemoveError(0);
|
|
dangerousUsageStrtolError(0);
|
|
udivWarning(0);
|
|
unusedStructMemberError(0, "structname", "variable");
|
|
passedByValueError(0, "parametername");
|
|
constStatementError(0, "type");
|
|
charArrayIndexError(0);
|
|
charBitOpError(0);
|
|
variableScopeError(0, "varname");
|
|
conditionAlwaysTrueFalse(0, "true/false");
|
|
strPlusChar(0);
|
|
|
|
// optimisations
|
|
postIncrementError(0, "varname", true);
|
|
emptyStringTestError(0, "varname", true);
|
|
}
|
|
|
|
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"
|
|
"* null pointer dereferencing\n"
|
|
"* using uninitialized variables and data\n"
|
|
|
|
// style
|
|
"* C-style pointer cast in cpp file\n"
|
|
"* redundant if\n"
|
|
"* bad usage of the function 'strtol'\n"
|
|
"* [[CheckUnsignedDivision|unsigned division]]\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"
|
|
|
|
// optimisations
|
|
"* optimisation: detect post increment/decrement\n";
|
|
}
|
|
|
|
private:
|
|
|
|
/**
|
|
* @brief Does one part of the check for nullPointer().
|
|
* Locate insufficient null-pointer handling after loop
|
|
*/
|
|
void nullPointerAfterLoop();
|
|
|
|
/**
|
|
* @brief Does one part of the check for nullPointer().
|
|
* looping through items in a linked list in a inner loop..
|
|
*/
|
|
void nullPointerLinkedList();
|
|
|
|
/**
|
|
* @brief Does one part of the check for nullPointer().
|
|
* Dereferencing a struct pointer and then checking if it's NULL..
|
|
*/
|
|
void nullPointerStructByDeRefAndChec();
|
|
|
|
/**
|
|
* @brief Does one part of the check for nullPointer().
|
|
* Dereferencing a pointer and then checking if it's NULL..
|
|
*/
|
|
void nullPointerByDeRefAndChec();
|
|
|
|
/**
|
|
* @brief Does one part of the check for nullPointer().
|
|
* -# initialize pointer to 0
|
|
* -# conditionally assign pointer
|
|
* -# dereference pointer
|
|
*/
|
|
void nullPointerConditionalAssignment();
|
|
|
|
/**
|
|
* @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;
|
|
}
|
|
};
|
|
/// @}
|
|
//---------------------------------------------------------------------------
|
|
#endif
|
|
|