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Fix related to previously fixed #3256 (Null pointer dereference not detected) 

Use reportInconclusiveError() instead of reportError().
This commit is contained in:
Reijo Tomperi 2011-10-29 15:55:52 +03:00
parent a79b5a5c36
commit 12a10a7297
1 changed files with 15 additions and 10 deletions
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17
lib/checknullpointer.cpp
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@ -768,6 +768,9 @@ void CheckNullPointer::nullPointerByCheckAndDeRef()
// Name of the pointer
const std::string &pointerName = vartok->str();
// Set to true if we would normally bail out the check.
bool inconclusive = false;
// Count { and } for tok2
for (const Token *tok2 = tok1; tok2; tok2 = tok2->next()) {
if (tok2->str() == "{")
@ -788,10 +791,10 @@ void CheckNullPointer::nullPointerByCheckAndDeRef()
if (Token::Match(tok2, "goto|return|continue|break|throw|if|switch")) {
bool dummy = false;
if (Token::Match(tok2, "return * %varid%", varid))
nullPointerError(tok2, pointerName, linenr);
nullPointerError(tok2, pointerName, linenr, inconclusive);
else if (Token::Match(tok2, "return %varid%", varid) &&
CheckNullPointer::isPointerDeRef(tok2->next(), dummy))
nullPointerError(tok2, pointerName, linenr);
nullPointerError(tok2, pointerName, linenr, inconclusive);
break;
}
@ -807,7 +810,7 @@ void CheckNullPointer::nullPointerByCheckAndDeRef()
parseFunctionCall(*tok2, var, 0);
for (std::list<const Token *>::const_iterator it = var.begin(); it != var.end(); ++it) {
if ((*it)->varId() == varid) {
nullPointerError(*it, pointerName, linenr);
nullPointerError(*it, pointerName, linenr, inconclusive);
break;
}
}
@ -817,14 +820,16 @@ void CheckNullPointer::nullPointerByCheckAndDeRef()
if (Token::simpleMatch(tok2, ") ;") &&
(Token::Match(tok2->link()->tokAt(-2), "[;{}.] %var% (") ||
Token::Match(tok2->link()->tokAt(-5), "[;{}] ( * %var% ) ("))) {
if (!_settings->inconclusive) {
// noreturn function?
// If inside null pointer check we unknown function call, we must
// assume that it can terminate the program and possible null pointer
// error wont ever happen.
if (tok2->strAt(2) == "}")
if (tok2->strAt(2) == "}") {
if (!_settings->inconclusive) {
break;
}
inconclusive = true;
}
// init function (global variables)
const SymbolDatabase *symbolDatabase = _tokenizer->getSymbolDatabase();
@ -843,7 +848,7 @@ void CheckNullPointer::nullPointerByCheckAndDeRef()
;
else if (CheckNullPointer::isPointerDeRef(tok2, unknown))
nullPointerError(tok2, pointerName, linenr);
nullPointerError(tok2, pointerName, linenr, inconclusive);
else
break;