void CheckLeakAutoVar::checkScope(const Token * const startToken,
VarInfo *varInfo,
std::set<unsigned int> notzero)
{
std::map<unsigned int, int> &alloctype = varInfo->alloctype;
std::map<unsigned int, std::string> &possibleUsage = varInfo->possibleUsage;
const std::set<unsigned int> conditionalAlloc(varInfo->conditionalAlloc);
// Parse all tokens
const Token * const endToken = startToken->link();
for (const Token *tok = startToken; tok && tok != endToken; tok = tok->next()) {
// Deallocation and then dereferencing pointer..
if (tok->varId() > 0) {
const std::map<unsigned int, int>::iterator var = alloctype.find(tok->varId());
if (var != alloctype.end()) {
if (var->second == DEALLOC && !Token::Match(tok->previous(), "[;{},=] %var% =")) {
deallocUseError(tok, tok->str());
} else if (Token::simpleMatch(tok->tokAt(-2), "= &")) {
varInfo->erase(tok->varId());
} else if (tok->strAt(-1) == "=") {
varInfo->erase(tok->varId());
}
} else if (Token::Match(tok->previous(), "& %var% = %var% ;")) {
varInfo->referenced.insert(tok->tokAt(2)->varId());
}
}
if (tok->str() == "(" && tok->previous()->isName()) {
functionCall(tok->previous(), varInfo, NOALLOC);
tok = tok->link();
continue;
}
// look for end of statement
if (!Token::Match(tok, "[;{}]") || Token::Match(tok->next(), "[;{}]"))
continue;
tok = tok->next();
if (!tok || tok == endToken)
break;
// parse statement
// assignment..
if (tok->varId() && Token::Match(tok, "%var% =")) {
// taking address of another variable..
if (Token::Match(tok->next(), "= %var% [+;]")) {
if (tok->tokAt(2)->varId() != tok->varId()) {
// If variable points at allocated memory => error
leakIfAllocated(tok, *varInfo);
// no multivariable checking currently => bail out for rhs variables
for (const Token *tok2 = tok; tok2; tok2 = tok2->next()) {
if (tok2->str() == ";") {
break;
}
if (tok2->varId()) {
varInfo->erase(tok2->varId());
}
}
}
}
// is variable used in rhs?
bool used_in_rhs = false;
for (const Token *tok2 = tok->tokAt(2); tok2; tok2 = tok2->next()) {
if (tok2->str() == ";") {
break;
}
if (tok->varId() == tok2->varId()) {
used_in_rhs = true;
break;
}
}
// TODO: Better checking how the pointer is used in rhs?
if (used_in_rhs)
continue;
// Variable has already been allocated => error
if (conditionalAlloc.find(tok->varId()) == conditionalAlloc.end())
leakIfAllocated(tok, *varInfo);
varInfo->erase(tok->varId());
// not a local variable nor argument?
const Variable *var = tok->variable();
if (var && !var->isArgument() && !var->isLocal()) {
continue;
}
// Don't check reference variables
if (var && var->isReference())
continue;
// allocation?
if (Token::Match(tok->tokAt(2), "%type% (")) {
int i = _settings->library.alloc(tok->tokAt(2));
if (i > 0) {
alloctype[tok->varId()] = i;
}
}
// Assigning non-zero value variable. It might be used to
// track the execution for a later if condition.
if (Token::Match(tok->tokAt(2), "%num% ;") && MathLib::toLongNumber(tok->strAt(2)) != 0)
notzero.insert(tok->varId());
else if (Token::Match(tok->tokAt(2), "- %type% ;") && tok->tokAt(3)->isUpperCaseName())
notzero.insert(tok->varId());
else
notzero.erase(tok->varId());
}
// if/else
else if (Token::simpleMatch(tok, "if (")) {
// Parse function calls inside the condition
for (const Token *innerTok = tok->tokAt(2); innerTok; innerTok = innerTok->next()) {
if (innerTok->str() == ")")
break;
if (innerTok->str() == "(" && innerTok->previous()->isName()) {
const int deallocId = _settings->library.dealloc(tok);
functionCall(innerTok->previous(), varInfo, deallocId);
innerTok = innerTok->link();
}
}
const Token *tok2 = tok->linkAt(1);
if (Token::simpleMatch(tok2, ") {")) {
VarInfo varInfo1(*varInfo); // VarInfo for if code
VarInfo varInfo2(*varInfo); // VarInfo for else code
if (Token::Match(tok->next(), "( %var% )")) {
varInfo2.erase(tok->tokAt(2)->varId());
if (notzero.find(tok->tokAt(2)->varId()) != notzero.end())
varInfo2.clear();
} else if (Token::Match(tok->next(), "( ! %var% )|&&")) {
varInfo1.erase(tok->tokAt(3)->varId());
} else if (Token::Match(tok->next(), "( %var% ( ! %var% ) )|&&")) {
varInfo1.erase(tok->tokAt(5)->varId());
} else if (Token::Match(tok->next(), "( %var% < 0 )|&&")) {
varInfo1.erase(tok->tokAt(2)->varId());
} else if (Token::Match(tok->next(), "( 0 > %var% )|&&")) {
varInfo1.erase(tok->tokAt(4)->varId());
} else if (Token::Match(tok->next(), "( %var% > 0 )|&&")) {
varInfo2.erase(tok->tokAt(2)->varId());
} else if (Token::Match(tok->next(), "( 0 < %var% )|&&")) {
varInfo2.erase(tok->tokAt(4)->varId());
}
checkScope(tok2->next(), &varInfo1, notzero);
tok2 = tok2->linkAt(1);
if (Token::simpleMatch(tok2, "} else {")) {
checkScope(tok2->tokAt(2), &varInfo2, notzero);
tok = tok2->linkAt(2)->previous();
} else {
tok = tok2->previous();
}
VarInfo old;
old.swap(*varInfo);
// Conditional allocation in varInfo1
std::map<unsigned int, int>::const_iterator it;
for (it = varInfo1.alloctype.begin(); it != varInfo1.alloctype.end(); ++it) {
if (varInfo2.alloctype.find(it->first) == varInfo2.alloctype.end() &&
old.alloctype.find(it->first) == old.alloctype.end()) {
varInfo->conditionalAlloc.insert(it->first);
}
}
// Conditional allocation in varInfo2
for (it = varInfo2.alloctype.begin(); it != varInfo2.alloctype.end(); ++it) {
if (varInfo1.alloctype.find(it->first) == varInfo1.alloctype.end() &&
old.alloctype.find(it->first) == old.alloctype.end()) {
varInfo->conditionalAlloc.insert(it->first);
}
}
// Conditional allocation/deallocation
for (it = varInfo1.alloctype.begin(); it != varInfo1.alloctype.end(); ++it) {
if (it->second == DEALLOC && conditionalAlloc.find(it->first) != conditionalAlloc.end()) {
varInfo->conditionalAlloc.erase(it->first);
varInfo2.erase(it->first);
}
}
for (it = varInfo2.alloctype.begin(); it != varInfo2.alloctype.end(); ++it) {
if (it->second == DEALLOC && conditionalAlloc.find(it->first) != conditionalAlloc.end()) {
varInfo->conditionalAlloc.erase(it->first);
varInfo1.erase(it->first);
}
}
alloctype.insert(varInfo1.alloctype.begin(), varInfo1.alloctype.end());
alloctype.insert(varInfo2.alloctype.begin(), varInfo2.alloctype.end());
possibleUsage.insert(varInfo1.possibleUsage.begin(), varInfo1.possibleUsage.end());
possibleUsage.insert(varInfo2.possibleUsage.begin(), varInfo2.possibleUsage.end());
}
}
// unknown control..
else if (Token::Match(tok, "%type% (") && Token::simpleMatch(tok->linkAt(1), ") {")) {
varInfo->clear();
break;
}
// Function call..
else if (Token::Match(tok, "%type% (") && tok->str() != "return") {
const int dealloc = _settings->library.dealloc(tok);
functionCall(tok, varInfo, dealloc);
tok = tok->next()->link();
// Handle scopes that might be noreturn
if (dealloc == NOALLOC && Token::simpleMatch(tok, ") ; }")) {
const std::string &functionName(tok->link()->previous()->str());
bool unknown = false;
if (_tokenizer->IsScopeNoReturn(tok->tokAt(2), &unknown)) {
if (!unknown)
varInfo->clear();
else if (_settings->library.leakignore.find(functionName) == _settings->library.leakignore.end() &&
_settings->library.use.find(functionName) == _settings->library.use.end())
varInfo->possibleUsageAll(functionName);
}
}
continue;
}
// return
else if (tok->str() == "return") {
ret(tok, *varInfo);
varInfo->clear();
}
// goto => weird execution path
else if (tok->str() == "goto") {
varInfo->clear();
}
// continue/break
else if (Token::Match(tok, "continue|break ;")) {
varInfo->clear();
}
// throw
// TODO: if the execution leave the function then treat it as return
else if (tok->str() == "throw") {
varInfo->clear();
}
}
}
void CheckLeakAutoVar::checkScope(const Token * const startToken,
VarInfo *varInfo,
std::set<unsigned int> notzero)
{
std::map<unsigned int, std::string> &alloctype = varInfo->alloctype;
std::map<unsigned int, std::string> &possibleUsage = varInfo->possibleUsage;
const std::set<unsigned int> conditionalAlloc(varInfo->conditionalAlloc);
// Allocation functions. key = function name, value = allocation type
std::map<std::string, std::string> allocFunctions(cfgalloc);
allocFunctions["malloc"] = "malloc";
allocFunctions["strdup"] = "malloc";
allocFunctions["fopen"] = "fopen";
// Deallocation functions. key = function name, value = allocation type
std::map<std::string, std::string> deallocFunctions(cfgdealloc);
deallocFunctions["free"] = "malloc";
deallocFunctions["fclose"] = "fopen";
// Parse all tokens
const Token * const endToken = startToken->link();
for (const Token *tok = startToken; tok && tok != endToken; tok = tok->next()) {
// Deallocation and then dereferencing pointer..
if (tok->varId() > 0) {
const std::map<unsigned int, std::string>::iterator var = alloctype.find(tok->varId());
if (var != alloctype.end()) {
if (var->second == "dealloc" && !Token::Match(tok->previous(), "[;{},=] %var% =")) {
deallocUseError(tok, tok->str());
} else if (Token::simpleMatch(tok->tokAt(-2), "= &")) {
varInfo->erase(tok->varId());
} else if (Token::simpleMatch(tok->previous(), "=")) {
varInfo->erase(tok->varId());
}
}
}
if (tok->str() == "(" && tok->previous()->isName()) {
functionCall(tok->previous(), varInfo, "");
tok = tok->link();
continue;
}
// look for end of statement
if (!Token::Match(tok, "[;{}]") || Token::Match(tok->next(), "[;{}]"))
continue;
tok = tok->next();
if (tok == endToken)
break;
// parse statement
// assignment..
if (tok && tok->varId() && Token::Match(tok, "%var% =")) {
// taking address of another variable..
if (Token::Match(tok->next(), "= %var% [+;]")) {
if (tok->tokAt(2)->varId() != tok->varId()) {
// If variable points at allocated memory => error
leakIfAllocated(tok, *varInfo);
// no multivariable checking currently => bail out for rhs variables
for (const Token *tok2 = tok; tok2; tok2 = tok2->next()) {
if (tok2->str() == ";") {
break;
}
if (tok2->varId()) {
varInfo->erase(tok2->varId());
}
}
}
}
// is variable used in rhs?
bool used_in_rhs = false;
for (const Token *tok2 = tok->tokAt(2); tok2; tok2 = tok2->next()) {
if (tok2->str() == ";") {
break;
}
if (tok->varId() == tok2->varId()) {
used_in_rhs = true;
break;
}
}
// TODO: Better checking how the pointer is used in rhs?
if (used_in_rhs)
continue;
// Variable has already been allocated => error
if (conditionalAlloc.find(tok->varId()) == conditionalAlloc.end())
leakIfAllocated(tok, *varInfo);
varInfo->erase(tok->varId());
// not a local variable nor argument?
const Variable *var = _tokenizer->getSymbolDatabase()->getVariableFromVarId(tok->varId());
if (var && !var->isArgument() && !var->isLocal()) {
continue;
}
// Don't check reference variables
if (var && var->isReference())
continue;
// allocation?
if (Token::Match(tok->tokAt(2), "%type% (")) {
const std::map<std::string, std::string>::const_iterator it = allocFunctions.find(tok->strAt(2));
if (it != allocFunctions.end()) {
alloctype[tok->varId()] = it->second;
}
}
// Assigning non-zero value variable. It might be used to
// track the execution for a later if condition.
if (Token::Match(tok->tokAt(2), "%num% ;") && MathLib::toLongNumber(tok->strAt(2)) != 0)
notzero.insert(tok->varId());
else if (Token::Match(tok->tokAt(2), "- %type% ;") && tok->tokAt(3)->isUpperCaseName())
notzero.insert(tok->varId());
else
notzero.erase(tok->varId());
}
// if/else
else if (Token::simpleMatch(tok, "if (")) {
// Parse function calls inside the condition
for (const Token *innerTok = tok->tokAt(2); innerTok; innerTok = innerTok->next()) {
if (innerTok->str() == ")")
break;
if (innerTok->str() == "(" && innerTok->previous()->isName()) {
std::string dealloc;
{
const std::map<std::string, std::string>::iterator func = deallocFunctions.find(tok->str());
if (func != deallocFunctions.end()) {
dealloc = func->second;
}
}
functionCall(innerTok->previous(), varInfo, dealloc);
innerTok = innerTok->link();
}
}
const Token *tok2 = tok->linkAt(1);
if (Token::simpleMatch(tok2, ") {")) {
VarInfo varInfo1(*varInfo);
VarInfo varInfo2(*varInfo);
if (Token::Match(tok->next(), "( %var% )")) {
varInfo2.erase(tok->tokAt(2)->varId());
if (notzero.find(tok->tokAt(2)->varId()) != notzero.end())
varInfo2.clear();
} else if (Token::Match(tok->next(), "( ! %var% )|&&")) {
varInfo1.erase(tok->tokAt(3)->varId());
} else if (Token::Match(tok->next(), "( %var% ( ! %var% ) )|&&")) {
varInfo1.erase(tok->tokAt(5)->varId());
}
checkScope(tok2->next(), &varInfo1, notzero);
tok2 = tok2->linkAt(1);
if (Token::simpleMatch(tok2, "} else {")) {
checkScope(tok2->tokAt(2), &varInfo2, notzero);
tok = tok2->linkAt(2)->previous();
} else {
tok = tok2->previous();
}
VarInfo old;
old.swap(*varInfo);
// Conditional allocation in varInfo1
std::map<unsigned int, std::string>::const_iterator it;
for (it = varInfo1.alloctype.begin(); it != varInfo1.alloctype.end(); ++it) {
if (varInfo2.alloctype.find(it->first) == varInfo2.alloctype.end() &&
old.alloctype.find(it->first) == old.alloctype.end()) {
varInfo->conditionalAlloc.insert(it->first);
}
}
// Conditional allocation in varInfo2
for (it = varInfo2.alloctype.begin(); it != varInfo2.alloctype.end(); ++it) {
if (varInfo1.alloctype.find(it->first) == varInfo1.alloctype.end() &&
old.alloctype.find(it->first) == old.alloctype.end()) {
varInfo->conditionalAlloc.insert(it->first);
}
}
// Conditional allocation/deallocation
for (it = varInfo1.alloctype.begin(); it != varInfo1.alloctype.end(); ++it) {
if (it->second == "dealloc" && conditionalAlloc.find(it->first) != conditionalAlloc.end()) {
varInfo->conditionalAlloc.erase(it->first);
varInfo2.erase(it->first);
}
}
for (it = varInfo2.alloctype.begin(); it != varInfo2.alloctype.end(); ++it) {
if (it->second == "dealloc" && conditionalAlloc.find(it->first) != conditionalAlloc.end()) {
varInfo->conditionalAlloc.erase(it->first);
varInfo1.erase(it->first);
}
}
alloctype.insert(varInfo1.alloctype.begin(), varInfo1.alloctype.end());
alloctype.insert(varInfo2.alloctype.begin(), varInfo2.alloctype.end());
possibleUsage.insert(varInfo1.possibleUsage.begin(), varInfo1.possibleUsage.end());
possibleUsage.insert(varInfo2.possibleUsage.begin(), varInfo2.possibleUsage.end());
}
}
// unknown control..
else if (Token::Match(tok, "%type% (") && Token::simpleMatch(tok->linkAt(1), ") {")) {
varInfo->clear();
break;
}
// Function call..
else if (Token::Match(tok, "%type% (") && tok->str() != "return") {
std::string dealloc;
{
const std::map<std::string, std::string>::iterator func = deallocFunctions.find(tok->str());
if (func != deallocFunctions.end()) {
dealloc = func->second;
}
}
functionCall(tok, varInfo, dealloc);
tok = tok->next()->link();
// Handle scopes that might be noreturn
if (dealloc.empty() && Token::simpleMatch(tok, ") ; }")) {
const std::string &functionName(tok->link()->previous()->str());
bool unknown = false;
if (cfgignore.find(functionName) == cfgignore.end() &&
cfguse.find(functionName) == cfguse.end() &&
_tokenizer->IsScopeNoReturn(tok->tokAt(2), &unknown)) {
if (unknown) {
//const std::string &functionName(tok->link()->previous()->str());
varInfo->possibleUsageAll(functionName);
} else {
varInfo->clear();
}
}
}
continue;
}
// return
else if (tok->str() == "return" || tok->str() == "throw") {
ret(tok, *varInfo);
varInfo->clear();
}
}
}
void CheckLeakAutoVar::checkScope(const Token * const startToken,
VarInfo *varInfo,
std::set<unsigned int> notzero)
{
std::map<unsigned int, VarInfo::AllocInfo> &alloctype = varInfo->alloctype;
std::map<unsigned int, std::string> &possibleUsage = varInfo->possibleUsage;
const std::set<unsigned int> conditionalAlloc(varInfo->conditionalAlloc);
// Parse all tokens
const Token * const endToken = startToken->link();
for (const Token *tok = startToken; tok && tok != endToken; tok = tok->next()) {
if (!tok->scope()->isExecutable()) {
tok = tok->scope()->classEnd;
if (!tok) // Ticket #6666 (crash upon invalid code)
break;
}
// Deallocation and then dereferencing pointer..
if (tok->varId() > 0) {
const std::map<unsigned int, VarInfo::AllocInfo>::const_iterator var = alloctype.find(tok->varId());
if (var != alloctype.end()) {
if (var->second.status == VarInfo::DEALLOC && tok->strAt(-1) != "&" && (!Token::Match(tok, "%name% =") || tok->strAt(-1) == "*")) {
deallocUseError(tok, tok->str());
} else if (Token::simpleMatch(tok->tokAt(-2), "= &")) {
varInfo->erase(tok->varId());
} else if (tok->strAt(-1) == "=") {
varInfo->erase(tok->varId());
}
} else if (Token::Match(tok->previous(), "& %name% = %var% ;")) {
varInfo->referenced.insert(tok->tokAt(2)->varId());
}
}
if (tok->str() == "(" && tok->previous()->isName()) {
VarInfo::AllocInfo allocation(0, VarInfo::NOALLOC);
functionCall(tok->previous(), varInfo, allocation);
tok = tok->link();
continue;
}
// look for end of statement
if (!Token::Match(tok, "[;{}]") || Token::Match(tok->next(), "[;{}]"))
continue;
tok = tok->next();
if (!tok || tok == endToken)
break;
// parse statement, skip to last member
while (Token::Match(tok, "%name% ::|. %name% !!("))
tok = tok->tokAt(2);
// assignment..
if (Token::Match(tok, "%var% =")) {
// taking address of another variable..
if (Token::Match(tok->next(), "= %var% [+;]")) {
if (tok->tokAt(2)->varId() != tok->varId()) {
// If variable points at allocated memory => error
leakIfAllocated(tok, *varInfo);
// no multivariable checking currently => bail out for rhs variables
for (const Token *tok2 = tok; tok2; tok2 = tok2->next()) {
if (tok2->str() == ";") {
break;
}
if (tok2->varId()) {
varInfo->erase(tok2->varId());
}
}
}
}
// is variable used in rhs?
bool used_in_rhs = false;
for (const Token *tok2 = tok->tokAt(2); tok2; tok2 = tok2->next()) {
if (tok2->str() == ";") {
break;
}
if (tok->varId() == tok2->varId()) {
used_in_rhs = true;
break;
}
}
// TODO: Better checking how the pointer is used in rhs?
if (used_in_rhs)
continue;
// Variable has already been allocated => error
if (conditionalAlloc.find(tok->varId()) == conditionalAlloc.end())
leakIfAllocated(tok, *varInfo);
varInfo->erase(tok->varId());
// not a local variable nor argument?
const Variable *var = tok->variable();
if (var && !var->isArgument() && (!var->isLocal() || var->isStatic()))
continue;
// Don't check reference variables
if (var && var->isReference())
continue;
// non-pod variable
if (_tokenizer->isCPP()) {
if (!var)
continue;
// Possibly automatically deallocated memory
if (!var->typeStartToken()->isStandardType() && Token::Match(tok, "%var% = new"))
continue;
}
// allocation?
if (tok->next()->astOperand2() && Token::Match(tok->next()->astOperand2()->previous(), "%type% (")) {
int i = _settings->library.alloc(tok->next()->astOperand2()->previous());
if (i > 0) {
alloctype[tok->varId()].type = i;
alloctype[tok->varId()].status = VarInfo::ALLOC;
}
} else if (_tokenizer->isCPP() && tok->strAt(2) == "new") {
alloctype[tok->varId()].type = -1;
alloctype[tok->varId()].status = VarInfo::ALLOC;
}
// Assigning non-zero value variable. It might be used to
// track the execution for a later if condition.
if (Token::Match(tok->tokAt(2), "%num% ;") && MathLib::toLongNumber(tok->strAt(2)) != 0)
notzero.insert(tok->varId());
else if (Token::Match(tok->tokAt(2), "- %type% ;") && tok->tokAt(3)->isUpperCaseName())
notzero.insert(tok->varId());
else
notzero.erase(tok->varId());
}
// if/else
else if (Token::simpleMatch(tok, "if (")) {
// Parse function calls inside the condition
for (const Token *innerTok = tok->tokAt(2); innerTok; innerTok = innerTok->next()) {
if (innerTok->str() == ")")
break;
if (innerTok->str() == "(" && innerTok->previous()->isName()) {
VarInfo::AllocInfo allocation(_settings->library.dealloc(tok), VarInfo::DEALLOC);
if (allocation.type == 0)
allocation.status = VarInfo::NOALLOC;
functionCall(innerTok->previous(), varInfo, allocation);
innerTok = innerTok->link();
}
}
const Token *tok2 = tok->linkAt(1);
if (Token::simpleMatch(tok2, ") {")) {
VarInfo varInfo1(*varInfo); // VarInfo for if code
VarInfo varInfo2(*varInfo); // VarInfo for else code
// Recursively scan variable comparisons in condition
std::stack<const Token *> tokens;
tokens.push(tok->next()->astOperand2());
while (!tokens.empty()) {
const Token *tok3 = tokens.top();
tokens.pop();
if (!tok3)
continue;
if (tok3->str() == "&&") {
tokens.push(tok3->astOperand1());
tokens.push(tok3->astOperand2());
continue;
}
if (tok3->str() == "(" && Token::Match(tok3->astOperand1(), "UNLIKELY|LIKELY")) {
tokens.push(tok3->astOperand2());
continue;
}
const Token *vartok = nullptr;
if (astIsVariableComparison(tok3, "!=", "0", &vartok)) {
varInfo2.erase(vartok->varId());
if (notzero.find(vartok->varId()) != notzero.end())
varInfo2.clear();
} else if (astIsVariableComparison(tok3, "==", "0", &vartok)) {
varInfo1.erase(vartok->varId());
} else if (astIsVariableComparison(tok3, "<", "0", &vartok)) {
varInfo1.erase(vartok->varId());
} else if (astIsVariableComparison(tok3, ">", "0", &vartok)) {
varInfo2.erase(vartok->varId());
} else if (astIsVariableComparison(tok3, "==", "-1", &vartok)) {
varInfo1.erase(vartok->varId());
}
}
checkScope(tok2->next(), &varInfo1, notzero);
tok2 = tok2->linkAt(1);
if (Token::simpleMatch(tok2, "} else {")) {
checkScope(tok2->tokAt(2), &varInfo2, notzero);
tok = tok2->linkAt(2)->previous();
} else {
tok = tok2->previous();
}
VarInfo old;
old.swap(*varInfo);
// Conditional allocation in varInfo1
std::map<unsigned int, VarInfo::AllocInfo>::const_iterator it;
for (it = varInfo1.alloctype.begin(); it != varInfo1.alloctype.end(); ++it) {
if (varInfo2.alloctype.find(it->first) == varInfo2.alloctype.end() &&
old.alloctype.find(it->first) == old.alloctype.end()) {
varInfo->conditionalAlloc.insert(it->first);
}
}
// Conditional allocation in varInfo2
for (it = varInfo2.alloctype.begin(); it != varInfo2.alloctype.end(); ++it) {
if (varInfo1.alloctype.find(it->first) == varInfo1.alloctype.end() &&
old.alloctype.find(it->first) == old.alloctype.end()) {
varInfo->conditionalAlloc.insert(it->first);
}
}
// Conditional allocation/deallocation
for (it = varInfo1.alloctype.begin(); it != varInfo1.alloctype.end(); ++it) {
if (it->second.status == VarInfo::DEALLOC && conditionalAlloc.find(it->first) != conditionalAlloc.end()) {
varInfo->conditionalAlloc.erase(it->first);
varInfo2.erase(it->first);
}
}
for (it = varInfo2.alloctype.begin(); it != varInfo2.alloctype.end(); ++it) {
if (it->second.status == VarInfo::DEALLOC && conditionalAlloc.find(it->first) != conditionalAlloc.end()) {
varInfo->conditionalAlloc.erase(it->first);
varInfo1.erase(it->first);
}
}
alloctype.insert(varInfo1.alloctype.begin(), varInfo1.alloctype.end());
alloctype.insert(varInfo2.alloctype.begin(), varInfo2.alloctype.end());
possibleUsage.insert(varInfo1.possibleUsage.begin(), varInfo1.possibleUsage.end());
possibleUsage.insert(varInfo2.possibleUsage.begin(), varInfo2.possibleUsage.end());
}
}
// unknown control.. (TODO: handle loops)
else if ((Token::Match(tok, "%type% (") && Token::simpleMatch(tok->linkAt(1), ") {")) || Token::simpleMatch(tok, "do {")) {
varInfo->clear();
break;
}
// return
else if (tok->str() == "return") {
ret(tok, *varInfo);
varInfo->clear();
}
// throw
else if (_tokenizer->isCPP() && tok->str() == "throw") {
bool tryFound = false;
const Scope* scope = tok->scope();
while (scope && scope->isExecutable()) {
if (scope->type == Scope::eTry)
tryFound = true;
scope = scope->nestedIn;
}
// If the execution leaves the function then treat it as return
if (!tryFound)
ret(tok, *varInfo);
varInfo->clear();
}
// Function call..
else if (Token::Match(tok, "%type% (")) {
VarInfo::AllocInfo allocation(_settings->library.dealloc(tok), VarInfo::DEALLOC);
if (allocation.type == 0)
allocation.status = VarInfo::NOALLOC;
functionCall(tok, varInfo, allocation);
tok = tok->next()->link();
// Handle scopes that might be noreturn
if (allocation.status == VarInfo::NOALLOC && Token::simpleMatch(tok, ") ; }")) {
const std::string &functionName(tok->link()->previous()->str());
bool unknown = false;
if (_tokenizer->IsScopeNoReturn(tok->tokAt(2), &unknown)) {
if (!unknown)
varInfo->clear();
else if (_settings->library.leakignore.find(functionName) == _settings->library.leakignore.end() &&
_settings->library.use.find(functionName) == _settings->library.use.end())
varInfo->possibleUsageAll(functionName);
}
}
continue;
}
// delete
else if (_tokenizer->isCPP() && tok->str() == "delete") {
if (tok->strAt(1) == "[")
tok = tok->tokAt(3);
else
tok = tok->next();
while (Token::Match(tok, "%name% ::|."))
tok = tok->tokAt(2);
if (tok->varId() && tok->strAt(1) != "[") {
VarInfo::AllocInfo allocation(-1, VarInfo::DEALLOC);
changeAllocStatus(varInfo, allocation, tok, tok);
}
}
// goto => weird execution path
else if (tok->str() == "goto") {
varInfo->clear();
}
// continue/break
else if (Token::Match(tok, "continue|break ;")) {
varInfo->clear();
}
}
}
