cppcheck/lib/checkuninitvar.h

128 lines
5.1 KiB
C++

/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2015 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 checkuninitvarH
#define checkuninitvarH
//---------------------------------------------------------------------------
#include "config.h"
#include "check.h"
class Scope;
class Variable;
/// @addtogroup Checks
/// @{
/** @brief Checking for uninitialized variables */
class CPPCHECKLIB CheckUninitVar : public Check {
public:
/** @brief This constructor is used when registering the CheckUninitVar */
CheckUninitVar() : Check(myName()), testrunner(false) {
}
/** @brief This constructor is used when running checks. */
CheckUninitVar(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
: Check(myName(), tokenizer, settings, errorLogger), testrunner(false) {
}
/** @brief Run checks against the simplified token list */
void runSimplifiedChecks(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger) {
CheckUninitVar checkUninitVar(tokenizer, settings, errorLogger);
checkUninitVar.executionPaths();
checkUninitVar.check();
checkUninitVar.deadPointer();
}
/** Check for uninitialized variables */
void check();
void checkScope(const Scope* scope);
void checkStruct(const Token *tok, const Variable &structvar);
enum Alloc { NO_ALLOC, NO_CTOR_CALL, CTOR_CALL };
bool checkScopeForVariable(const Token *tok, const Variable& var, bool* const possibleInit, bool* const noreturn, Alloc* const alloc, const std::string &membervar);
bool checkIfForWhileHead(const Token *startparentheses, const Variable& var, bool suppressErrors, bool isuninit, Alloc alloc, const std::string &membervar);
bool checkLoopBody(const Token *tok, const Variable& var, const Alloc alloc, const std::string &membervar, const bool suppressErrors);
void checkRhs(const Token *tok, const Variable &var, Alloc alloc, const std::string &membervar);
bool isVariableUsage(const Token *vartok, bool ispointer, Alloc alloc) const;
static bool isMemberVariableAssignment(const Token *tok, const std::string &membervar);
bool isMemberVariableUsage(const Token *tok, bool isPointer, Alloc alloc, const std::string &membervar) const;
/** ValueFlow-based checking for dead pointer usage */
void deadPointer();
void deadPointerError(const Token *pointer, const Token *alias);
/* data for multifile checking */
class MyFileInfo : public Check::FileInfo {
public:
/* functions that must have initialized data */
std::set<std::string> uvarFunctions;
/* functions calls with uninitialized data */
std::set<std::string> functionCalls;
};
/** @brief Parse current TU and extract file info */
Check::FileInfo *getFileInfo(const Tokenizer *tokenizer, const Settings *settings) const;
/** @brief Analyse all file infos for all TU */
void analyseWholeProgram(const std::list<Check::FileInfo*> &fileInfo, ErrorLogger &errorLogger);
void analyseFunctions(const Tokenizer *tokenizer, std::set<std::string> &f) const;
/** @brief new type of check: check execution paths */
void executionPaths();
void uninitstringError(const Token *tok, const std::string &varname, bool strncpy_);
void uninitdataError(const Token *tok, const std::string &varname);
void uninitvarError(const Token *tok, const std::string &varname);
void uninitStructMemberError(const Token *tok, const std::string &membername);
/** testrunner: (don't abort() when assertion fails, just write error message) */
bool testrunner;
private:
void getErrorMessages(ErrorLogger *errorLogger, const Settings *settings) const {
CheckUninitVar c(0, settings, errorLogger);
// error
c.uninitstringError(0, "varname", true);
c.uninitdataError(0, "varname");
c.uninitvarError(0, "varname");
c.uninitStructMemberError(0, "a.b");
c.deadPointerError(0,0);
}
static std::string myName() {
return "Uninitialized variables";
}
std::string classInfo() const {
return "Uninitialized variables\n"
"- using uninitialized local variables\n"
"- using allocated data before it has been initialized\n"
"- using dead pointer\n";
}
};
/// @}
//---------------------------------------------------------------------------
#endif // checkuninitvarH