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Memory Leak: Handling Linux lists better => Detect more leaks

This commit is contained in:
Daniel Marjamäki 2008-11-15 18:24:40 +00:00
parent 43dcf6efd6
commit 2cbfa6b60b
3 changed files with 26 additions and 15 deletions
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31
CheckMemoryLeak.cpp
View File

@ -188,7 +188,7 @@ AllocType CheckMemoryLeakClass::GetDeallocationType( const TOKEN *tok, const cha
static std::list<std::string> callstack; static std::list<std::string> callstack;
const char * CheckMemoryLeakClass::call_func( const TOKEN *tok, const char *varnames[] ) const char * CheckMemoryLeakClass::call_func( const TOKEN *tok, const char typestr[], const char *varnames[] )
{ {
if (Match(tok,"if") || Match(tok,"for") || Match(tok,"while")) if (Match(tok,"if") || Match(tok,"for") || Match(tok,"while"))
return 0; return 0;
@ -227,7 +227,7 @@ const char * CheckMemoryLeakClass::call_func( const TOKEN *tok, const char *varn
// Check if the function deallocates the variable.. // Check if the function deallocates the variable..
while ( ftok && ! Match(ftok,"{") ) while ( ftok && ! Match(ftok,"{") )
ftok = ftok->next; ftok = ftok->next;
TOKEN *func = getcode( Tokenizer::gettok(ftok,1), parname ); TOKEN *func = getcode( Tokenizer::gettok(ftok,1), typestr, parname );
simplifycode( func ); simplifycode( func );
const char *ret = 0; const char *ret = 0;
if (findmatch(func, "goto")) if (findmatch(func, "goto"))
@ -291,7 +291,7 @@ extern bool ShowAll;
* varname - name of variable * varname - name of variable
*/ */
TOKEN *CheckMemoryLeakClass::getcode(const TOKEN *tok, const char varname[]) TOKEN *CheckMemoryLeakClass::getcode(const TOKEN *tok, const char typestr[], const char varname[])
{ {
const char *varnames[2]; const char *varnames[2];
varnames[0] = varname; varnames[0] = varname;
@ -454,7 +454,7 @@ TOKEN *CheckMemoryLeakClass::getcode(const TOKEN *tok, const char varname[])
// Investigate function calls.. // Investigate function calls..
if ( Match(tok, "%var% (") ) if ( Match(tok, "%var% (") )
{ {
const char *str = call_func(tok, varnames); const char *str = call_func(tok, typestr, varnames);
if ( str ) if ( str )
addtoken( str ); addtoken( str );
} }
@ -462,8 +462,19 @@ TOKEN *CheckMemoryLeakClass::getcode(const TOKEN *tok, const char varname[])
// Linux lists.. // Linux lists..
if ( Match( tok, "[=(,] & %var1% [.[]", varnames ) ) if ( Match( tok, "[=(,] & %var1% [.[]", varnames ) )
{ {
// todo: better checking // Linux list -> the first member of the struct
addtoken("use"); std::string pattern("struct " + std::string(typestr) + " {");
const TOKEN *tok2 = findmatch(tokens, pattern.c_str());
if ( ! tok2 )
{
addtoken("use");
}
else
{
tok2 = findmatch(tok2, "%var% [;,]");
if ( !tok2 || Match(tok2, Tokenizer::getstr(tok, 4)) )
addtoken("use");
}
} }
} }
@ -766,11 +777,11 @@ void CheckMemoryLeakClass::simplifycode(TOKEN *tok)
// Simpler but less powerful than "CheckMemoryLeak_CheckScope_All" // Simpler but less powerful than "CheckMemoryLeak_CheckScope_All"
void CheckMemoryLeakClass::CheckMemoryLeak_CheckScope( const TOKEN *Tok1, const char varname[] ) void CheckMemoryLeakClass::CheckMemoryLeak_CheckScope( const TOKEN *Tok1, const char typestr[], const char varname[] )
{ {
callstack.clear(); callstack.clear();
TOKEN *tok = getcode( Tok1, varname ); TOKEN *tok = getcode( Tok1, typestr, varname );
// If the variable is not allocated at all => no memory leak // If the variable is not allocated at all => no memory leak
if (findmatch(tok, "alloc") == 0) if (findmatch(tok, "alloc") == 0)
@ -866,10 +877,10 @@ void CheckMemoryLeakClass::CheckMemoryLeak_InFunction()
if (indentlevel>0 && infunc) if (indentlevel>0 && infunc)
{ {
if ( Match(tok, "[{};] %type% * %var% [;=]") ) if ( Match(tok, "[{};] %type% * %var% [;=]") )
CheckMemoryLeak_CheckScope( tok->next, Tokenizer::getstr(tok, 3) ); CheckMemoryLeak_CheckScope( tok->next, Tokenizer::getstr(tok, 1), Tokenizer::getstr(tok, 3) );
else if ( Match(tok, "[{};] %type% %type% * %var% [;=]") ) else if ( Match(tok, "[{};] %type% %type% * %var% [;=]") )
CheckMemoryLeak_CheckScope( tok->next, Tokenizer::getstr(tok, 4) ); CheckMemoryLeak_CheckScope( tok->next, Tokenizer::getstr(tok, 2), Tokenizer::getstr(tok, 4) );
} }
} }
} }

6
CheckMemoryLeak.h
View File

@ -42,16 +42,16 @@ private:
void CheckMemoryLeak_ClassMembers_ParseClass( const TOKEN *tok1, std::vector<const char *> &classname ); void CheckMemoryLeak_ClassMembers_ParseClass( const TOKEN *tok1, std::vector<const char *> &classname );
void CheckMemoryLeak_ClassMembers(); void CheckMemoryLeak_ClassMembers();
void CheckMemoryLeak_InFunction(); void CheckMemoryLeak_InFunction();
void CheckMemoryLeak_CheckScope( const TOKEN *Tok1, const char varname[] ); void CheckMemoryLeak_CheckScope( const TOKEN *Tok1, const char typestr[], const char varname[] );
void simplifycode(TOKEN *tok); void simplifycode(TOKEN *tok);
void erase(TOKEN *begin, const TOKEN *end); void erase(TOKEN *begin, const TOKEN *end);
TOKEN *getcode(const TOKEN *tok, const char varname[]); TOKEN *getcode(const TOKEN *tok, const char typestr[], const char varname[]);
bool notvar(const TOKEN *tok, const char *varnames[]); bool notvar(const TOKEN *tok, const char *varnames[]);
void instoken(TOKEN *tok, const char str[]); void instoken(TOKEN *tok, const char str[]);
void MemoryLeak( const TOKEN *tok, const char varname[] ); void MemoryLeak( const TOKEN *tok, const char varname[] );
void MismatchError( const TOKEN *Tok1, const char varname[] ); void MismatchError( const TOKEN *Tok1, const char varname[] );
const char * call_func( const TOKEN *tok, const char *varnames[] ); const char * call_func( const TOKEN *tok, const char typestr[], const char *varnames[] );
AllocType GetDeallocationType( const TOKEN *tok, const char *varnames[] ); AllocType GetDeallocationType( const TOKEN *tok, const char *varnames[] );
AllocType GetAllocationType( const TOKEN *tok2 ); AllocType GetAllocationType( const TOKEN *tok2 );
bool isclass( const std::string &typestr ); bool isclass( const std::string &typestr );

2
testmemleak.cpp
View File

@ -113,7 +113,7 @@ private:
TEST_CASE( throw1 ); TEST_CASE( throw1 );
TEST_CASE( linux_list_1 ); TEST_CASE( linux_list_1 );
// TODO: TEST_CASE( linux_list_2 ); TEST_CASE( linux_list_2 );
TEST_CASE( sizeof1 ); TEST_CASE( sizeof1 );
} }