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Remove 'unsafeClassDivZero' warning. The software verification will cover this better.

This commit is contained in:
Daniel Marjamäki 2019-11-10 16:49:34 +01:00
parent fcc5fad3ed
commit eaa5bfcadd
3 changed files with 0 additions and 93 deletions
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44
lib/checkclass.cpp
View File

@ -2586,50 +2586,6 @@ void CheckClass::copyCtorAndEqOperatorError(const Token *tok, const std::string
reportError(tok, Severity::warning, "copyCtorAndEqOperator", message);
}
void CheckClass::checkUnsafeClassDivZero(bool test)
{
// style severity: it is a style decision if classes should be safe or
// if users should be required to be careful. I expect that many users
// will disagree about these reports.
if (!mSettings->isEnabled(Settings::STYLE))
return;
for (const Scope * classScope : mSymbolDatabase->classAndStructScopes) {
if (!test && classScope->classDef->fileIndex() != 1)
continue;
for (const Function &func : classScope->functionList) {
if (func.access != AccessControl::Public)
continue;
if (!func.hasBody())
continue;
if (func.name().compare(0,8,"operator")==0)
continue;
for (const Token *tok = func.functionScope->bodyStart; tok; tok = tok->next()) {
if (Token::Match(tok, "if|switch|while|for|do|}"))
break;
if (tok->str() != "/")
continue;
if (!tok->valueType() || !tok->valueType()->isIntegral())
continue;
if (!tok->astOperand2())
continue;
const Variable *var = tok->astOperand2()->variable();
if (!var || !var->isArgument())
continue;
unsafeClassDivZeroError(tok, classScope->className, func.name(), var->name());
break;
}
}
}
}
void CheckClass::unsafeClassDivZeroError(const Token *tok, const std::string &className, const std::string &methodName, const std::string &varName)
{
const std::string symbols = "$symbol:" + className + "\n$symbol:" + methodName + "\n$symbol:" + varName + '\n';
const std::string s = className + "::" + methodName + "()";
reportError(tok, Severity::style, "unsafeClassDivZero", symbols + "Public interface of " + className + " is not safe. When calling " + s + ", if parameter " + varName + " is 0 that leads to division by zero.");
}
void CheckClass::checkOverride()
{
if (!mSettings->isEnabled(Settings::STYLE))

6
lib/checkclass.h
View File

@ -61,7 +61,6 @@ public:
// can't be a simplified check .. the 'sizeof' is used.
checkClass.checkMemset();
checkClass.checkUnsafeClassDivZero();
checkClass.constructors();
checkClass.operatorEq();
checkClass.privateFunctions();
@ -141,9 +140,6 @@ public:
/** @brief Check that copy constructor and operator defined together */
void checkCopyCtorAndEqOperator();
/** @brief Check that arbitrary usage of the public interface does not result in division by zero */
void checkUnsafeClassDivZero(bool test=false);
/** @brief Check that the override keyword is used when overriding virtual functions */
void checkOverride();
@ -185,7 +181,6 @@ private:
void virtualFunctionCallInConstructorError(const Function * scopeFunction, const std::list<const Token *> & tokStack, const std::string &funcname);
void duplInheritedMembersError(const Token* tok1, const Token* tok2, const std::string &derivedName, const std::string &baseName, const std::string &variableName, bool derivedIsStruct, bool baseIsStruct);
void copyCtorAndEqOperatorError(const Token *tok, const std::string &classname, bool isStruct, bool hasCopyCtor);
void unsafeClassDivZeroError(const Token *tok, const std::string &className, const std::string &methodName, const std::string &varName);
void overrideError(const Function *funcInBase, const Function *funcInDerived);
void unsafeClassRefMemberError(const Token *tok, const std::string &varname);
@ -221,7 +216,6 @@ private:
c.selfInitializationError(nullptr, "var");
c.duplInheritedMembersError(nullptr, nullptr, "class", "class", "variable", false, false);
c.copyCtorAndEqOperatorError(nullptr, "class", false, false);
c.unsafeClassDivZeroError(nullptr, "Class", "dostuff", "x");
c.pureVirtualFunctionCallInConstructorError(nullptr, std::list<const Token *>(), "f");
c.virtualFunctionCallInConstructorError(nullptr, std::list<const Token *>(), "f");
c.overrideError(nullptr, nullptr);

43
test/testclass.cpp
View File

@ -217,8 +217,6 @@ private:
TEST_CASE(explicitConstructors);
TEST_CASE(copyCtorAndEqOperator);
TEST_CASE(unsafeClassDivZero);
TEST_CASE(override1);
TEST_CASE(overrideCVRefQualifiers);
@ -7058,47 +7056,6 @@ private:
ASSERT_EQUALS("", errout.str());
}
void checkUnsafeClassDivZero(const char code[]) {
// Clear the error log
errout.str("");
Settings settings;
settings.addEnabled("style");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// Check..
CheckClass checkClass(&tokenizer, &settings, this);
checkClass.checkUnsafeClassDivZero(true);
}
void unsafeClassDivZero() {
checkUnsafeClassDivZero("class A {\n"
"public:\n"
" void dostuff(int x);\n"
"}\n"
"void A::dostuff(int x) { int a = 1000 / x; }");
ASSERT_EQUALS("[test.cpp:5]: (style) Public interface of A is not safe. When calling A::dostuff(), if parameter x is 0 that leads to division by zero.\n", errout.str());
checkUnsafeClassDivZero("class A {\n"
"public:\n"
" void f1();\n"
" void f2(int x);\n"
"}\n"
"void A::f1() {}\n"
"void A::f2(int x) { int a = 1000 / x; }");
ASSERT_EQUALS("[test.cpp:7]: (style) Public interface of A is not safe. When calling A::f2(), if parameter x is 0 that leads to division by zero.\n", errout.str());
checkUnsafeClassDivZero("class A {\n"
"public:\n"
" void operator/(int x);\n"
"}\n"
"void A::operator/(int x) { int a = 1000 / x; }");
ASSERT_EQUALS("", errout.str());
}
void checkOverride(const char code[]) {
// Clear the error log
errout.str("");