7408674017
http://sourceforge.net/apps/trac/cppcheck/ticket/601 Fix #641 ((style) Member variable not initialized in the constructor: False Positive) http://sourceforge.net/apps/trac/cppcheck/ticket/641 This fix will also cause us not to detect several potential issues, but as there are so many false positives, any unknown function call should stop the error for now. New ticket is created to handle regression caused by this: http://sourceforge.net/apps/trac/cppcheck/ticket/643
730 lines
25 KiB
C++
730 lines
25 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2009 Daniel Marjamäki and Cppcheck team.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/
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*/
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#include "../src/tokenize.h"
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#include "../src/checkclass.h"
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#include "testsuite.h"
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#include <sstream>
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extern std::ostringstream errout;
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class TestClass : public TestFixture
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{
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public:
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TestClass() : TestFixture("TestClass")
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{ }
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private:
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void run()
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{
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TEST_CASE(virtualDestructor1); // Base class not found => no error
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TEST_CASE(virtualDestructor2); // Base class doesn't have a destructor
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TEST_CASE(virtualDestructor3); // Base class has a destructor, but it's not virtual
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TEST_CASE(virtualDestructor4); // Derived class doesn't have a destructor => no error
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TEST_CASE(virtualDestructor5); // Derived class has empty destructor => no error
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TEST_CASE(virtualDestructorProtected);
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TEST_CASE(virtualDestructorInherited);
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TEST_CASE(virtualDestructorTemplate);
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TEST_CASE(uninitVar1);
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TEST_CASE(uninitVarEnum);
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TEST_CASE(uninitVarStream);
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TEST_CASE(uninitVarTypedef);
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TEST_CASE(uninitVarArray);
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TEST_CASE(uninitMissingFuncDef);// can't expand function in constructor
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TEST_CASE(privateCtor1); // If constructor is private..
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TEST_CASE(privateCtor2); // If constructor is private..
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TEST_CASE(function); // Function is not variable
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TEST_CASE(uninitVarHeader1); // Class is defined in header
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TEST_CASE(uninitVarHeader2); // Class is defined in header
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TEST_CASE(uninitVarHeader3); // Class is defined in header
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TEST_CASE(uninitVarPublished); // Variables in the published section are auto-initialized
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TEST_CASE(noConstructor1);
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TEST_CASE(noConstructor2);
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TEST_CASE(operatorEq1);
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TEST_CASE(memsetOnStruct);
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TEST_CASE(memsetOnClass);
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}
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// Check the operator Equal
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void checkOpertorEq(const char code[])
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{
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// Tokenize..
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Tokenizer tokenizer;
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std::istringstream istr(code);
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tokenizer.tokenize(istr, "test.cpp");
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tokenizer.simplifyTokenList();
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// Clear the error log
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errout.str("");
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// Check..
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Settings settings;
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CheckClass checkClass(&tokenizer, &settings, this);
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checkClass.operatorEq();
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}
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void operatorEq1()
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{
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checkOpertorEq("class A\n"
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"{\n"
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"public:\n"
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" void goo() {}"
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" void operator=(const& A);\n"
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"};\n");
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ASSERT_EQUALS("[test.cpp:4]: (style) 'operator=' should return something\n", errout.str());
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checkOpertorEq("class A\n"
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"{\n"
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"private:\n"
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" void operator=(const& A);\n"
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"};\n");
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ASSERT_EQUALS("", errout.str());
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checkOpertorEq("class A\n"
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"{\n"
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" void operator=(const& A);\n"
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"};\n");
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ASSERT_EQUALS("", errout.str());
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checkOpertorEq("class A\n"
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"{\n"
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"public:\n"
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" void goo() {}\n"
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"private:\n"
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" void operator=(const& A);\n"
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"};\n");
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ASSERT_EQUALS("", errout.str());
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}
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// Check that base classes have virtual destructors
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void checkVirtualDestructor(const char code[])
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{
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// Tokenize..
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Tokenizer tokenizer;
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std::istringstream istr(code);
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tokenizer.tokenize(istr, "test.cpp");
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tokenizer.simplifyTokenList();
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// Clear the error log
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errout.str("");
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// Check..
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Settings settings;
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CheckClass checkClass(&tokenizer, &settings, this);
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checkClass.virtualDestructor();
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}
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void virtualDestructor1()
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{
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// Base class not found
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checkVirtualDestructor("class Derived : public Base { };");
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ASSERT_EQUALS("", errout.str());
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checkVirtualDestructor("class Derived : Base { };");
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ASSERT_EQUALS("", errout.str());
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}
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void virtualDestructor2()
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{
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// Base class doesn't have a destructor
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checkVirtualDestructor("class Base { };\n"
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"class Derived : public Base { public: ~Derived() { (void)11; } };");
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ASSERT_EQUALS("[test.cpp:1]: (error) Class Base which is inherited by class Derived does not have a virtual destructor\n", errout.str());
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checkVirtualDestructor("class Base { };\n"
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"class Derived : Base { public: ~Derived() { (void)11; } };");
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ASSERT_EQUALS("", errout.str());
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}
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void virtualDestructor3()
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{
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// Base class has a destructor, but it's not virtual
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checkVirtualDestructor("class Base { public: ~Base(); };\n"
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"class Derived : public Base { public: ~Derived() { (void)11; } };");
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ASSERT_EQUALS("[test.cpp:1]: (error) Class Base which is inherited by class Derived does not have a virtual destructor\n", errout.str());
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checkVirtualDestructor("class Base { public: ~Base(); };\n"
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"class Derived : private Fred, public Base { public: ~Derived() { (void)11; } };");
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ASSERT_EQUALS("[test.cpp:1]: (error) Class Base which is inherited by class Derived does not have a virtual destructor\n", errout.str());
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}
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void virtualDestructor4()
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{
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// Derived class doesn't have a destructor => no error
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checkVirtualDestructor("class Base { public: ~Base(); };\n"
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"class Derived : public Base { };");
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ASSERT_EQUALS("", errout.str());
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checkVirtualDestructor("class Base { public: ~Base(); };\n"
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"class Derived : private Fred, public Base { };");
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ASSERT_EQUALS("", errout.str());
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}
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void virtualDestructor5()
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{
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// Derived class has empty destructor => no error
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checkVirtualDestructor("class Base { public: ~Base(); };\n"
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"class Derived : public Base { public: ~Derived() {} };");
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ASSERT_EQUALS("", errout.str());
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checkVirtualDestructor("class Base { public: ~Base(); };\n"
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"class Derived : public Base { public: ~Derived(); }; Derived::~Derived() {}");
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ASSERT_EQUALS("", errout.str());
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}
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void virtualDestructorProtected()
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{
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// Base class has protected destructor, it makes Base *p = new Derived(); fail
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// during compilation time, so error is not possible. => no error
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checkVirtualDestructor("class A\n"
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"{\n"
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"protected:\n"
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" ~A() { }\n"
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"};\n"
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"\n"
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"class B : public A\n"
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"{\n"
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"public:\n"
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" ~B() { int a; }\n"
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"};\n");
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ASSERT_EQUALS("", errout.str());
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}
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void virtualDestructorInherited()
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{
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// class A inherits virtual destructor from class Base -> no error
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checkVirtualDestructor("class Base\n"
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"{\n"
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"public:\n"
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"virtual ~Base() {}\n"
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"};\n"
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"class A : private Base\n"
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"{\n"
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"public:\n"
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" ~A() { }\n"
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"};\n"
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"\n"
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"class B : public A\n"
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"{\n"
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"public:\n"
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" ~B() { int a; }\n"
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"};\n");
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ASSERT_EQUALS("", errout.str());
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// class A inherits virtual destructor from struct Base -> no error
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// also notice that public is not given, but destructor is public, because
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// we are using struct instead of class
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checkVirtualDestructor("struct Base\n"
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"{\n"
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"virtual ~Base() {}\n"
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"};\n"
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"class A : public Base\n"
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"{\n"
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"};\n"
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"\n"
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"class B : public A\n"
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"{\n"
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"public:\n"
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" ~B() { int a; }\n"
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"};\n");
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ASSERT_EQUALS("", errout.str());
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// Unknown Base class -> it could have virtual destructor, so ignore
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checkVirtualDestructor("class A : private Base\n"
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"{\n"
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"public:\n"
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" ~A() { }\n"
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"};\n"
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"\n"
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"class B : public A\n"
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"{\n"
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"public:\n"
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" ~B() { int a; }\n"
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"};\n");
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ASSERT_EQUALS("", errout.str());
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// Virtual destructor is inherited -> no error
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checkVirtualDestructor("class Base2\n"
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"{\n"
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"virtual ~Base2() {}\n"
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"};\n"
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"class Base : public Base2\n"
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"{\n"
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"};\n"
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"class A : private Base\n"
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"{\n"
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"public:\n"
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" ~A() { }\n"
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"};\n"
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"\n"
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"class B : public A\n"
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"{\n"
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"public:\n"
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" ~B() { int a; }\n"
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"};\n");
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ASSERT_EQUALS("", errout.str());
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// class A doesn't inherit virtual destructor from class Base -> error
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checkVirtualDestructor("class Base\n"
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"{\n"
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"public:\n"
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"~Base() {}\n"
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"};\n"
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"class A : private Base\n"
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"{\n"
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"public:\n"
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" ~A() { }\n"
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"};\n"
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"\n"
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"class B : public A\n"
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"{\n"
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"public:\n"
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" ~B() { int a; }\n"
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"};\n");
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TODO_ASSERT_EQUALS("[test.cpp:7]: (error) Class A which is inherited by class B does not have a virtual destructor\n", errout.str());
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}
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void virtualDestructorTemplate()
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{
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// Base class has protected destructor, it makes Base *p = new Derived(); fail
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// during compilation time, so error is not possible. => no error
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checkVirtualDestructor("template <typename T> class A\n"
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"{\n"
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" public:\n"
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" virtual ~A(){}\n"
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"};\n"
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"template <typename T> class AA\n"
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"{\n"
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" public:\n"
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" ~AA(){}\n"
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"};\n"
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"class B : public A<int>, public AA<double>\n"
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"{\n"
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" public:\n"
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" ~B(){int a;}\n"
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"};\n");
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ASSERT_EQUALS("[test.cpp:7]: (error) Class AA which is inherited by class B does not have a virtual destructor\n", errout.str());
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}
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void checkUninitVar(const char code[])
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{
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// Tokenize..
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Tokenizer tokenizer;
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std::istringstream istr(code);
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tokenizer.tokenize(istr, "test.cpp");
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tokenizer.simplifyTokenList();
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// Clear the error log
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errout.str("");
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// Check..
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Settings settings;
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CheckClass checkClass(&tokenizer, &settings, this);
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checkClass.constructors();
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}
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void uninitVar1()
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{
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checkUninitVar("enum ECODES\n"
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"{\n"
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" CODE_1 = 0,\n"
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" CODE_2 = 1\n"
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"};\n"
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"\n"
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"class Fred\n"
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"{\n"
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"public:\n"
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" Fred() {}\n"
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"\n"
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"private:\n"
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" ECODES _code;\n"
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"};\n");
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ASSERT_EQUALS("[test.cpp:10]: (style) Member variable not initialized in the constructor 'Fred::_code'\n", errout.str());
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checkUninitVar("class A{};\n"
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"\n"
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"class B : public A\n"
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"{\n"
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"public:\n"
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" B() {}\n"
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"private:\n"
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" float f;\n"
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"};\n");
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ASSERT_EQUALS("[test.cpp:6]: (style) Member variable not initialized in the constructor 'B::f'\n", errout.str());
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checkUninitVar("class C\n"
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"{\n"
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" FILE *fp;\n"
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"\n"
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"public:\n"
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" C(FILE *fp);\n"
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"};\n"
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"\n"
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"C::C(FILE *fp) {\n"
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" C::fp = fp;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void uninitVarArray()
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{
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checkUninitVar("class John\n"
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"{\n"
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"public:\n"
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" John() {}\n"
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"\n"
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"private:\n"
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" char name[255];\n"
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"};\n");
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ASSERT_EQUALS("[test.cpp:4]: (style) Member variable not initialized in the constructor 'John::name'\n", errout.str());
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checkUninitVar("class John\n"
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"{\n"
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"public:\n"
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" John() {John::name[0] = '\\0';}\n"
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"\n"
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"private:\n"
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" char name[255];\n"
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"};\n");
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ASSERT_EQUALS("", errout.str());
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checkUninitVar("class John\n"
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"{\n"
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"public:\n"
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" John() { strcpy(name, ""); }\n"
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"\n"
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"private:\n"
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" char name[255];\n"
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"};\n");
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ASSERT_EQUALS("", errout.str());
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}
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void uninitMissingFuncDef()
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{
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// Unknown member function
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checkUninitVar("class Fred\n"
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"{\n"
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"public:\n"
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" Fred() { Init(); }\n"
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"private:\n"
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" void Init();"
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" int i;\n"
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"};\n");
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ASSERT_EQUALS("", errout.str());
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// Unknown non-member function
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checkUninitVar("class Fred\n"
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"{\n"
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"public:\n"
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" Fred() { Init(); }\n"
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"private:\n"
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" int i;\n"
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"};\n");
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TODO_ASSERT_EQUALS("[test.cpp:4]: (style) Member variable not initialized in the constructor 'Fred::i'\n", errout.str());
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}
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void uninitVarEnum()
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{
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checkUninitVar("class Fred\n"
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"{\n"
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"public:\n"
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" enum abc {a,b,c};\n"
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" Fred() {}\n"
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"private:\n"
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" unsigned int i;\n"
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"};\n");
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ASSERT_EQUALS("[test.cpp:5]: (style) Member variable not initialized in the constructor 'Fred::i'\n", errout.str());
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}
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void uninitVarStream()
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{
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checkUninitVar("#include <fstream>\n"
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"class Foo\n"
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"{\n"
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"private:\n"
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" int foo;\n"
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"public:\n"
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" Foo(std::istream &in)\n"
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" {\n"
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" if(!(in >> foo))\n"
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" throw 0;\n"
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" }\n"
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"};\n");
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ASSERT_EQUALS("", errout.str());
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}
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void uninitVarTypedef()
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{
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checkUninitVar("class Foo\n"
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"{\n"
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"public:\n"
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" typedef int * pointer;\n"
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" Foo() : a(0) {}\n"
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" pointer a;\n"
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"};\n");
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ASSERT_EQUALS("", errout.str());
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}
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void privateCtor1()
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{
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checkUninitVar("class Foo {\n"
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" int foo;\n"
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" Foo() { }\n"
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"};\n");
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ASSERT_EQUALS("", errout.str());
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}
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void privateCtor2()
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{
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checkUninitVar("class Foo\n"
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"{\n"
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"private:\n"
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" int foo;\n"
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" Foo() { }\n"
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"public:\n"
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" Foo(int _i) { }\n"
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"};\n");
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TODO_ASSERT_EQUALS("[test.cpp:7] (style) Member variable not initialized in the constructor Foo::foo", errout.str());
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}
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void function()
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{
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checkUninitVar("class A\n"
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"{\n"
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"public:\n"
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" A();\n"
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" int* f(int*);\n"
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"};\n"
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"\n"
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"A::A()\n"
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"{\n"
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"}\n"
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"\n"
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"int* A::f(int* p)\n"
|
|
"{\n"
|
|
" return p;\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
void uninitVarHeader1()
|
|
{
|
|
checkUninitVar("#file \"fred.h\"\n"
|
|
"class Fred\n"
|
|
"{\n"
|
|
"private:\n"
|
|
" unsigned int i;\n"
|
|
"public:\n"
|
|
" Fred();\n"
|
|
"};\n"
|
|
"#endfile\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void uninitVarHeader2()
|
|
{
|
|
checkUninitVar("#file \"fred.h\"\n"
|
|
"class Fred\n"
|
|
"{\n"
|
|
"private:\n"
|
|
" unsigned int i;\n"
|
|
"public:\n"
|
|
" Fred() { }\n"
|
|
"};\n"
|
|
"#endfile\n");
|
|
ASSERT_EQUALS("[fred.h:6]: (style) Member variable not initialized in the constructor 'Fred::i'\n", errout.str());
|
|
}
|
|
|
|
void uninitVarHeader3()
|
|
{
|
|
checkUninitVar("#file \"fred.h\"\n"
|
|
"class Fred\n"
|
|
"{\n"
|
|
"private:\n"
|
|
" mutable int i;\n"
|
|
"public:\n"
|
|
" Fred() { }\n"
|
|
"};\n"
|
|
"#endfile\n");
|
|
ASSERT_EQUALS("[fred.h:6]: (style) Member variable not initialized in the constructor 'Fred::i'\n", errout.str());
|
|
}
|
|
|
|
|
|
void uninitVarPublished()
|
|
{
|
|
checkUninitVar("class Fred\n"
|
|
"{\n"
|
|
"__published:\n"
|
|
" int *i;\n"
|
|
"public:\n"
|
|
" Fred() { }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
|
|
void checkNoConstructor(const char code[])
|
|
{
|
|
// Tokenize..
|
|
Tokenizer tokenizer;
|
|
std::istringstream istr(code);
|
|
tokenizer.tokenize(istr, "test.cpp");
|
|
tokenizer.simplifyTokenList();
|
|
|
|
// Clear the error log
|
|
errout.str("");
|
|
|
|
// Check..
|
|
Settings settings;
|
|
settings._checkCodingStyle = true;
|
|
CheckClass checkClass(&tokenizer, &settings, this);
|
|
checkClass.constructors();
|
|
}
|
|
|
|
void noConstructor1()
|
|
{
|
|
// There are nonstatic member variables - constructor is needed
|
|
checkNoConstructor("class Fred\n"
|
|
"{\n"
|
|
" int i;\n"
|
|
"};\n");
|
|
ASSERT_EQUALS("[test.cpp:1]: (style) The class 'Fred' has no constructor\n", errout.str());
|
|
}
|
|
|
|
void noConstructor2()
|
|
{
|
|
checkNoConstructor("class Fred\n"
|
|
"{\n"
|
|
"public:\n"
|
|
" static void foobar();\n"
|
|
"};\n"
|
|
"\n"
|
|
"void Fred::foobar()\n"
|
|
"{ }\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void noConstructor3()
|
|
{
|
|
checkNoConstructor("class Fred\n"
|
|
"{\n"
|
|
"public:\n"
|
|
" static int foobar;\n"
|
|
"};\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void checkNoMemset(const char code[])
|
|
{
|
|
// Tokenize..
|
|
Tokenizer tokenizer;
|
|
std::istringstream istr(code);
|
|
tokenizer.tokenize(istr, "test.cpp");
|
|
|
|
|
|
// Clear the error log
|
|
errout.str("");
|
|
|
|
// Check..
|
|
Settings settings;
|
|
CheckClass checkClass(&tokenizer, &settings, this);
|
|
checkClass.noMemset();
|
|
}
|
|
|
|
void memsetOnClass()
|
|
{
|
|
checkNoMemset("class A\n"
|
|
"{\n"
|
|
"};\n"
|
|
"void f()\n"
|
|
"{\n"
|
|
" A fail;\n"
|
|
" memset(&fail, 0, sizeof(A));\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:7]: (error) Using 'memset' on class\n", errout.str());
|
|
|
|
checkNoMemset("struct A\n"
|
|
"{\n"
|
|
"};\n"
|
|
"void f()\n"
|
|
"{\n"
|
|
" struct A fail;\n"
|
|
" memset(&fail, 0, sizeof(A));\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void memsetOnStruct()
|
|
{
|
|
checkNoMemset("class A\n"
|
|
"{\n"
|
|
" void g( struct sockaddr_in6& a);\n"
|
|
"private:\n"
|
|
" std::string b; \n"
|
|
"};\n"
|
|
"void f()\n"
|
|
"{\n"
|
|
" struct sockaddr_in6 fail;\n"
|
|
" memset(&fail, 0, sizeof(struct sockaddr_in6));\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
checkNoMemset("struct A\n"
|
|
"{\n"
|
|
" void g( struct sockaddr_in6& a);\n"
|
|
"private:\n"
|
|
" std::string b; \n"
|
|
"};\n"
|
|
"void f()\n"
|
|
"{\n"
|
|
" struct A fail;\n"
|
|
" memset(&fail, 0, sizeof(struct A));\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:10]: (error) Using 'memset' on struct that contains a 'std::string'\n", errout.str());
|
|
}
|
|
};
|
|
|
|
REGISTER_TEST(TestClass)
|