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Fix #11576 FP comparePointers / FN cstyleCast when taking address (#4817) 

* Fix FN cstyleCast when taking address

* Fix #11576 FP comparePointers with member variable

* Use getParentLifetime()

* Fix test case number
This commit is contained in:
chrchr-github 2023-02-23 17:27:47 +01:00 committed by GitHub
parent 9b62caf0ef
commit fb88883813
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2 changed files with 22 additions and 3 deletions
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8
lib/checkother.cpp
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@ -303,7 +303,7 @@ void CheckOther::warningOldStylePointerCast()
tok = scope->bodyStart;
for (; tok && tok != scope->bodyEnd; tok = tok->next()) {
// Old style pointer casting..
if (!Token::Match(tok, "( const|volatile| const|volatile|class|struct| %type% * *| *| const|&| ) (| %name%|%num%|%bool%|%char%|%str%"))
if (!Token::Match(tok, "( const|volatile| const|volatile|class|struct| %type% * *| *| const|&| ) (| %name%|%num%|%bool%|%char%|%str%|&"))
continue;
if (Token::Match(tok->previous(), "%type%"))
continue;
@ -3685,6 +3685,12 @@ void CheckOther::checkComparePointers()
continue;
if (var1->isRValueReference() || var2->isRValueReference())
continue;
if (const Token* parent2 = getParentLifetime(mTokenizer->isCPP(), v2.tokvalue, &mSettings->library))
if (var1 == parent2->variable())
continue;
if (const Token* parent1 = getParentLifetime(mTokenizer->isCPP(), v1.tokvalue, &mSettings->library))
if (var2 == parent1->variable())
continue;
comparePointersError(tok, &v1, &v2);
}
}

17
test/testother.cpp
View File

@ -2653,7 +2653,7 @@ private:
" U* y = (U*)(&x)\n"
" y->mutate();\n" //to avoid warnings that y can be const
"}");
ASSERT_EQUALS("", errout.str());
ASSERT_EQUALS("[test.cpp:4]: (style) C-style pointer casting\n", errout.str());
check("struct C { void f() const; };\n" // #9875 - crash
"\n"
@ -5159,7 +5159,7 @@ private:
}
void testMisusedScopeObjectNamespace() {
check("namespace M {\n" // #4479
check("namespace M {\n" // #4779
" namespace N {\n"
" struct S {};\n"
" }\n"
@ -10653,6 +10653,19 @@ private:
" return xp > yp;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("struct S { int i; };\n" // #11576
"int f(S s) {\n"
" return &s.i - (int*)&s;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) C-style pointer casting\n", errout.str());
check("struct S { int i; };\n"
"int f(S s1, S s2) {\n"
" return &s1.i - reinterpret_cast<int*>(&s2);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:1] -> [test.cpp:3] -> [test.cpp:2] -> [test.cpp:3] -> [test.cpp:3]: (error) Subtracting pointers that point to different objects\n",
errout.str());
}
void unusedVariableValueTemplate() {