detect simple memory leaks (address not taken) More...

#include <checkmemoryleak.h>

Inheritance diagram for CheckMemoryLeakNoVar:

Public Member Functions
	CheckMemoryLeakNoVar ()

Public Member Functions inherited from Check
	Check (const std::string &aname)
	This constructor is used when registering the CheckClass. More...

virtual	~Check ()

	Check (const Check &)=delete

Check &	operator= (const Check &)=delete

const std::string &	name () const
	class name, used to generate documentation More...

virtual FileInfo *	getFileInfo (const Tokenizer &, const Settings &) const

virtual FileInfo *	loadFileInfoFromXml (const tinyxml2::XMLElement *xmlElement) const

virtual bool	analyseWholeProgram (const CTU::FileInfo ctu, const std::list< FileInfo > &fileInfo, const Settings &, ErrorLogger &)

Private Member Functions
	CheckMemoryLeakNoVar (const Tokenizer tokenizer, const Settings settings, ErrorLogger *errorLogger)

void	runChecks (const Tokenizer &tokenizer, ErrorLogger *errorLogger) override
	run checks, the token list is not simplified More...

void	check ()

void	checkForUnreleasedInputArgument (const Scope *scope)
	Check if an input argument to a function is the return value of an allocation function like malloc(), and the function does not release it. More...

void	checkForUnusedReturnValue (const Scope *scope)
	Check if a call to an allocation function like malloc() is made and its return value is not assigned. More...

void	checkForUnsafeArgAlloc (const Scope *scope)
	Check if an exception could cause a leak in an argument constructed with shared_ptr/unique_ptr. More...

void	functionCallLeak (const Token *loc, const std::string &alloc, const std::string &functionCall)

void	returnValueNotUsedError (const Token *tok, const std::string &alloc)

void	unsafeArgAllocError (const Token *tok, const std::string &funcName, const std::string &ptrType, const std::string &objType)

void	getErrorMessages (ErrorLogger e, const Settings settings) const override
	get error messages More...

std::string	classInfo () const override
	get information about this class, used to generate documentation More...

Private Member Functions inherited from CheckMemoryLeak
	CheckMemoryLeak ()=delete

	CheckMemoryLeak (const CheckMemoryLeak &)=delete

CheckMemoryLeak &	operator= (const CheckMemoryLeak &)=delete

	CheckMemoryLeak (const Tokenizer t, ErrorLogger e, const Settings *s)

void	memoryLeak (const Token *tok, const std::string &varname, AllocType alloctype) const

AllocType	getDeallocationType (const Token *tok, nonneg int varid) const
	Get type of deallocation at given position. More...

AllocType	getAllocationType (const Token tok2, nonneg int varid, std::list< const Function > *callstack=nullptr) const
	Get type of allocation at given position. More...

AllocType	getReallocationType (const Token *tok2, nonneg int varid) const
	Get type of reallocation at given position. More...

bool	isReopenStandardStream (const Token *tok) const
	Check if token reopens a standard stream. More...

bool	isOpenDevNull (const Token *tok) const
	Check if token opens /dev/null. More...

void	memleakError (const Token *tok, const std::string &varname) const
	Report that there is a memory leak (new/malloc/etc) More...

void	resourceLeakError (const Token *tok, const std::string &varname) const
	Report that there is a resource leak (fopen/popen/etc) More...

void	deallocuseError (const Token *tok, const std::string &varname) const

void	mismatchAllocDealloc (const std::list< const Token * > &callstack, const std::string &varname) const

void	memleakUponReallocFailureError (const Token *tok, const std::string &reallocfunction, const std::string &varname) const

AllocType	functionReturnType (const Function func, std::list< const Function > *callstack=nullptr) const
	What type of allocated memory does the given function return? More...

Static Private Member Functions
static std::string	myName ()

Friends
class	TestMemleakNoVar

Additional Inherited Members
Static Public Member Functions inherited from Check
static std::list< Check * > &	instances ()
	List of registered check classes. More...

static void	writeToErrorList (const ErrorMessage &errmsg)
	Write given error to stdout in xml format. More...

Protected Member Functions inherited from Check
	Check (std::string aname, const Tokenizer tokenizer, const Settings settings, ErrorLogger *errorLogger)
	This constructor is used when running checks. More...

void	reportError (const Token *tok, const Severity severity, const std::string &id, const std::string &msg)
	report an error More...

void	reportError (const Token *tok, const Severity severity, const std::string &id, const std::string &msg, const CWE &cwe, Certainty certainty)
	report an error More...

void	reportError (const std::list< const Token * > &callstack, Severity severity, const std::string &id, const std::string &msg)
	report an error More...

void	reportError (const std::list< const Token * > &callstack, Severity severity, const std::string &id, const std::string &msg, const CWE &cwe, Certainty certainty)
	report an error More...

void	reportError (const ErrorPath &errorPath, Severity severity, const char id[], const std::string &msg, const CWE &cwe, Certainty certainty)

void	logChecker (const char id[])
	log checker More...

ErrorPath	getErrorPath (const Token errtok, const ValueFlow::Value value, std::string bug) const

bool	wrongData (const Token tok, const char str)
	Use WRONG_DATA in checkers when you check for wrong data. More...

Static Protected Member Functions inherited from Check
static std::string	getMessageId (const ValueFlow::Value &value, const char id[])

Protected Attributes inherited from Check
const Tokenizer *const	mTokenizer {}

const Settings *const	mSettings {}

ErrorLogger *const	mErrorLogger {}

Private Types inherited from CheckMemoryLeak
enum	AllocType { No , Malloc , New , NewArray , File , Fd , Pipe , OtherMem , OtherRes , Many }
	What type of allocation are used. More...

Detailed Description

detect simple memory leaks (address not taken)

Definition at line 307 of file checkmemoryleak.h.

Constructor & Destructor Documentation

◆ CheckMemoryLeakNoVar() [1/2]

CheckMemoryLeakNoVar::CheckMemoryLeakNoVar ( )

inline

Definition at line 311 of file checkmemoryleak.h.

◆ CheckMemoryLeakNoVar() [2/2]

CheckMemoryLeakNoVar::CheckMemoryLeakNoVar	(	const Tokenizer *	tokenizer,
		const Settings *	settings,
		ErrorLogger *	errorLogger
	)

inlineprivate

Definition at line 314 of file checkmemoryleak.h.

Member Function Documentation

◆ check()

void CheckMemoryLeakNoVar::check ( )

private

Definition at line 932 of file checkmemoryleak.cpp.

References checkForUnreleasedInputArgument(), checkForUnsafeArgAlloc(), checkForUnusedReturnValue(), SymbolDatabase::functionScopes, Tokenizer::getSymbolDatabase(), Check::logChecker(), and Check::mTokenizer.

Referenced by runChecks().

◆ checkForUnreleasedInputArgument()

void CheckMemoryLeakNoVar::checkForUnreleasedInputArgument ( const Scope * scope )

private

Check if an input argument to a function is the return value of an allocation function like malloc(), and the function does not release it.

Parameters

scope The scope of the function to check.

Definition at line 958 of file checkmemoryleak.cpp.

References Token::astParent(), Scope::bodyEnd, Scope::bodyStart, Library::detectContainerOrIterator(), Token::expressionString(), functionCallLeak(), CheckMemoryLeak::getAllocationType(), getArguments(), Token::isCast(), Library::isLeakIgnore(), CheckMemoryLeak::isReopenStandardStream(), Token::isStandardType(), Settings::library, Token::Match(), Check::mSettings, CheckMemoryLeak::New, CheckMemoryLeak::NewArray, Token::next(), CheckMemoryLeak::No, Settings::platform, Library::podtype(), Token::simpleMatch(), Platform::sizeof_pointer, Token::type(), ValueType::typeSize(), and Variable::valueType().

Referenced by check().

◆ checkForUnsafeArgAlloc()

void CheckMemoryLeakNoVar::checkForUnsafeArgAlloc ( const Scope * scope )

private

Check if an exception could cause a leak in an argument constructed with shared_ptr/unique_ptr.

Parameters

scope The scope of the function to check.

Definition at line 1093 of file checkmemoryleak.cpp.

References Scope::bodyEnd, Scope::bodyStart, Settings::certainty, inconclusive, Function::isAttributeNothrow(), Tokenizer::isCPP(), SimpleEnableGroup< T >::isEnabled(), Function::isThrow(), Token::link(), Token::Match(), Check::mSettings, Check::mTokenizer, Token::next(), Token::nextArgument(), Settings::severity, Token::simpleMatch(), Token::str(), Token::strAt(), Token::tokAt(), unsafeArgAllocError(), and warning.

Referenced by check().

◆ checkForUnusedReturnValue()

void CheckMemoryLeakNoVar::checkForUnusedReturnValue ( const Scope * scope )

private

Check if a call to an allocation function like malloc() is made and its return value is not assigned.

Parameters

scope The scope of the function to check.

Definition at line 1031 of file checkmemoryleak.cpp.

References Token::astParent(), Scope::bodyEnd, Scope::bodyStart, Library::detectContainer(), Token::findmatch(), CheckMemoryLeak::getAllocationType(), Token::isCast(), CheckMemoryLeak::isOpenDevNull(), CheckMemoryLeak::isReopenStandardStream(), Token::isStandardType(), Settings::library, Token::link(), Token::Match(), Check::mSettings, Token::next(), CheckMemoryLeak::No, precedes(), returnValueNotUsedError(), Token::simpleMatch(), and Token::str().

Referenced by check().

◆ classInfo()

std::string CheckMemoryLeakNoVar::classInfo ( ) const

inlineoverrideprivatevirtual

get information about this class, used to generate documentation

Implements Check.

Definition at line 358 of file checkmemoryleak.h.

◆ functionCallLeak()

void CheckMemoryLeakNoVar::functionCallLeak	(	const Token *	loc,
		const std::string &	alloc,
		const std::string &	functionCall
	)

private

Definition at line 1138 of file checkmemoryleak.cpp.

References CWE772, error, normal, and Check::reportError().

Referenced by checkForUnreleasedInputArgument(), and getErrorMessages().

◆ getErrorMessages()

void CheckMemoryLeakNoVar::getErrorMessages	(	ErrorLogger *	errorLogger,
		const Settings *	settings
	)		const

inlineoverrideprivatevirtual

get error messages

Implements Check.

Definition at line 347 of file checkmemoryleak.h.

References functionCallLeak(), returnValueNotUsedError(), and unsafeArgAllocError().

◆ myName()

static std::string CheckMemoryLeakNoVar::myName ( )

inlinestaticprivate

Definition at line 354 of file checkmemoryleak.h.

◆ returnValueNotUsedError()

void CheckMemoryLeakNoVar::returnValueNotUsedError	(	const Token *	tok,
		const std::string &	alloc
	)

private

Definition at line 1143 of file checkmemoryleak.cpp.

References CWE771, error, normal, and Check::reportError().

Referenced by checkForUnusedReturnValue(), and getErrorMessages().

◆ runChecks()

void CheckMemoryLeakNoVar::runChecks	(	const Tokenizer &	,
		ErrorLogger *
	)

inlineoverrideprivatevirtual

run checks, the token list is not simplified

Implements Check.

Definition at line 317 of file checkmemoryleak.h.

References check(), and Tokenizer::getSettings().

◆ unsafeArgAllocError()

void CheckMemoryLeakNoVar::unsafeArgAllocError	(	const Token *	tok,
		const std::string &	funcName,
		const std::string &	ptrType,
		const std::string &	objType
	)

private

Definition at line 1148 of file checkmemoryleak.cpp.

References CWE401, inconclusive, Check::reportError(), and warning.

Referenced by checkForUnsafeArgAlloc(), and getErrorMessages().

Friends And Related Function Documentation

◆ TestMemleakNoVar

friend class TestMemleakNoVar

friend

Definition at line 308 of file checkmemoryleak.h.

The documentation for this class was generated from the following files:

Public Member Functions

Private Member Functions

Static Private Member Functions

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ CheckMemoryLeakNoVar() [1/2]

◆ CheckMemoryLeakNoVar() [2/2]

Member Function Documentation

◆ check()

◆ checkForUnreleasedInputArgument()

◆ checkForUnsafeArgAlloc()

◆ checkForUnusedReturnValue()

◆ classInfo()

◆ functionCallLeak()

◆ getErrorMessages()

◆ myName()

◆ returnValueNotUsedError()

◆ runChecks()

◆ unsafeArgAllocError()

Friends And Related Function Documentation

◆ TestMemleakNoVar