walkero/cppcheck
1
0
Fork 0
Code Issues Pull Requests Projects Releases 1 Wiki Activity

Fixed #2662 (Segfault: overloaded function call function with same name)

Browse Source
This commit is contained in:
Daniel Marjamäki 2011-03-23 18:45:47 +01:00
parent 3259239dfe
commit 5f36ede4f5
3 changed files with 31 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
lib/checkmemoryleak.cpp
View File

@ -104,7 +104,7 @@ bool CheckMemoryLeak::isclass(const Tokenizer *_tokenizer, const Token *tok) con
} }
//--------------------------------------------------------------------------- //---------------------------------------------------------------------------
CheckMemoryLeak::AllocType CheckMemoryLeak::getAllocationType(const Token *tok2, unsigned int varid) const CheckMemoryLeak::AllocType CheckMemoryLeak::getAllocationType(const Token *tok2, unsigned int varid, std::list<const Token *> *callstack) const
{ {
// What we may have... // What we may have...
// * var = (char *)malloc(10); // * var = (char *)malloc(10);
@ -190,7 +190,19 @@ CheckMemoryLeak::AllocType CheckMemoryLeak::getAllocationType(const Token *tok2,
// User function // User function
const Token *ftok = tokenizer->getFunctionTokenByName(tok2->str().c_str()); const Token *ftok = tokenizer->getFunctionTokenByName(tok2->str().c_str());
return functionReturnType(ftok); if (ftok == NULL)
return No;
// Prevent recursion
if (callstack && std::find(callstack->begin(), callstack->end(), ftok) != callstack->end())
return No;
std::list<const Token *> cs;
if (!callstack)
callstack = &cs;
callstack->push_back(ftok);
return functionReturnType(ftok, callstack);
} }
@ -386,13 +398,11 @@ void CheckMemoryLeak::mismatchAllocDealloc(const std::list<const Token *> &calls
reportErr(callstack, Severity::error, "mismatchAllocDealloc", "Mismatching allocation and deallocation: " + varname); reportErr(callstack, Severity::error, "mismatchAllocDealloc", "Mismatching allocation and deallocation: " + varname);
} }
CheckMemoryLeak::AllocType CheckMemoryLeak::functionReturnType(const Token *tok) const CheckMemoryLeak::AllocType CheckMemoryLeak::functionReturnType(const Token *tok, std::list<const Token *> *callstack) const
{ {
if (!tok) if (!tok)
return No; return No;
const std::string functionName = tok->str();
// Locate start of function // Locate start of function
while (tok) while (tok)
{ {
@ -437,11 +447,7 @@ CheckMemoryLeak::AllocType CheckMemoryLeak::functionReturnType(const Token *tok)
} }
else if (tok2->str() == "return") else if (tok2->str() == "return")
{ {
// recursion => bail out AllocType allocType = getAllocationType(tok2->next(), 0, callstack);
if (tok2->strAt(1) == functionName)
return No;
AllocType allocType = getAllocationType(tok2->next(), 0);
if (allocType != No) if (allocType != No)
return allocType; return allocType;
} }
@ -457,11 +463,7 @@ CheckMemoryLeak::AllocType CheckMemoryLeak::functionReturnType(const Token *tok)
{ {
if (Token::Match(tok, "%varid% =", varid)) if (Token::Match(tok, "%varid% =", varid))
{ {
// recursion => bail out allocType = getAllocationType(tok->tokAt(2), varid, callstack);
if (tok->strAt(2) == functionName)
return No;
allocType = getAllocationType(tok->tokAt(2), varid);
} }
if (Token::Match(tok, "= %varid% ;", varid)) if (Token::Match(tok, "= %varid% ;", varid))
{ {

4
lib/checkmemoryleak.h
View File

@ -114,7 +114,7 @@ public:
/** /**
* @brief Get type of allocation at given position * @brief Get type of allocation at given position
*/ */
AllocType getAllocationType(const Token *tok2, unsigned int varid) const; AllocType getAllocationType(const Token *tok2, unsigned int varid, std::list<const Token *> *callstack = NULL) const;
/** /**
* @brief Get type of reallocation at given position * @brief Get type of reallocation at given position
@ -144,7 +144,7 @@ public:
void memleakUponReallocFailureError(const Token *tok, const std::string &varname); void memleakUponReallocFailureError(const Token *tok, const std::string &varname);
/** What type of allocated memory does the given function return? */ /** What type of allocated memory does the given function return? */
AllocType functionReturnType(const Token *tok) const; AllocType functionReturnType(const Token *tok, std::list<const Token *> *callstack = NULL) const;
/** Function allocates pointed-to argument (a la asprintf)? */ /** Function allocates pointed-to argument (a la asprintf)? */
const char *functionArgAlloc(const Token *tok, unsigned int targetpar, AllocType &allocType) const; const char *functionArgAlloc(const Token *tok, unsigned int targetpar, AllocType &allocType) const;

12
test/testmemleak.cpp
View File

@ -3631,6 +3631,18 @@ private:
" char *s = foo();\n" " char *s = foo();\n"
"}\n"); "}\n");
ASSERT_EQUALS("", errout.str()); ASSERT_EQUALS("", errout.str());
check("int shl()\n"
"{\n"
" int a = shr();\n"
" return a;\n"
"}\n"
"\n"
"int shr()\n"
"{\n"
" return shl();\n"
"}\n");
ASSERT_EQUALS("", errout.str());
} }
}; };