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Fix issue 9556: FP mismatchingContainers: raw pointer comparison (#2465) 

* Fix issue 9556: FP mismatchingContainers: raw pointer comparison

* Formatting
This commit is contained in:
Paul Fultz II 2020-01-01 05:02:21 -06:00 committed by amai2012
parent 9b48802a7f
commit 30b9455e89
2 changed files with 38 additions and 0 deletions
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7
lib/checkstl.cpp
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@ -621,6 +621,13 @@ bool CheckStl::checkIteratorPair(const Token* tok1, const Token* tok2)
if (val1.tokvalue && val2.tokvalue && val1.lifetimeKind == val2.lifetimeKind) {
if (val1.lifetimeKind == ValueFlow::Value::LifetimeKind::Lambda)
return false;
if (tok1->astParent() == tok2->astParent() && Token::Match(tok1->astParent(), "%comp%|-")) {
if (val1.lifetimeKind == ValueFlow::Value::LifetimeKind::Address)
return false;
if (val1.lifetimeKind == ValueFlow::Value::LifetimeKind::Object &&
(!astIsContainer(val1.tokvalue) || !astIsContainer(val2.tokvalue)))
return false;
}
if (isSameExpression(true, false, val1.tokvalue, val2.tokvalue, mSettings->library, false, false))
return false;
if (val1.tokvalue->expressionString() == val2.tokvalue->expressionString())

31
test/teststl.cpp
View File

@ -66,6 +66,7 @@ private:
TEST_CASE(iterator21);
TEST_CASE(iterator22);
TEST_CASE(iterator23);
TEST_CASE(iterator24);
TEST_CASE(iteratorExpression);
TEST_CASE(iteratorSameExpression);
@ -1072,6 +1073,36 @@ private:
ASSERT_EQUALS("", errout.str());
}
void iterator24()
{ // #9556
check("void f(int a, int b) {\n"
" if (&a == &b) {}\n"
"}\n");
ASSERT_EQUALS("", errout.str());
check("void f(int a, int b) {\n"
" if (std::for_each(&a, &b + 1, [](auto) {})) {}\n"
"}\n");
ASSERT_EQUALS("[test.cpp:2]: (error) Iterators of different containers 'a' and 'b' are used together.\n",
errout.str());
check("void f(int a, int b) {\n"
" if (std::for_each(&a, &b, [](auto) {})) {}\n"
"}\n");
ASSERT_EQUALS("[test.cpp:2]: (error) Iterators of different containers 'a' and 'b' are used together.\n",
errout.str());
check("void f(int a) {\n"
" if (std::for_each(&a, &a, [](auto) {})) {}\n"
"}\n");
ASSERT_EQUALS("[test.cpp:2]: (style) Same iterators expression are used for algorithm.\n", errout.str());
check("void f(int a) {\n"
" if (std::for_each(&a, &a + 1, [](auto) {})) {}\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void iteratorExpression() {
check("std::vector<int>& f();\n"
"std::vector<int>& g();\n"