570 lines
17 KiB
C++
570 lines
17 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/checkstl.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 TestStl : public TestFixture
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{
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public:
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TestStl() : TestFixture("TestStl")
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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(iterator1);
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TEST_CASE(iterator2);
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TEST_CASE(iterator3);
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TEST_CASE(iterator4);
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TEST_CASE(iterator5);
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TEST_CASE(dereference);
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TEST_CASE(dereference_member);
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TEST_CASE(STLSize);
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TEST_CASE(STLSizeNoErr);
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TEST_CASE(erase);
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TEST_CASE(eraseBreak);
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TEST_CASE(eraseReturn);
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TEST_CASE(eraseGoto);
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TEST_CASE(eraseAssign);
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TEST_CASE(eraseErase);
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TEST_CASE(pushback1);
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TEST_CASE(pushback2);
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TEST_CASE(pushback3);
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TEST_CASE(pushback4);
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TEST_CASE(pushback5);
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TEST_CASE(pushback6);
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TEST_CASE(pushback7);
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TEST_CASE(pushback8);
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TEST_CASE(insert1);
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TEST_CASE(invalidcode);
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TEST_CASE(stlBoundries1);
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TEST_CASE(stlBoundries2);
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TEST_CASE(stlBoundries3);
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}
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void check(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.setVarId();
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// Clear the error buffer..
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errout.str("");
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// Check..
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CheckStl checkStl;
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checkStl.runSimplifiedChecks(&tokenizer, (const Settings *)0, this);
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}
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void iterator1()
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{
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check("void f()\n"
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"{\n"
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" list<int> l1;\n"
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" list<int> l2;\n"
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" for (list<int>::iterator it = l1.begin(); it != l2.end(); ++it)\n"
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" { }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:5]: (error) Same iterator is used with both l1 and l2\n", errout.str());
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}
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void iterator2()
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{
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check("void foo()\n"
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"{\n"
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" list<int> l1;\n"
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" list<int> l2;\n"
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" list<int>::iterator it = l1.begin();\n"
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" while (it != l2.end())\n"
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" {\n"
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" ++it;\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:6]: (error) Same iterator is used with both l1 and l2\n", errout.str());
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}
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void iterator3()
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{
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check("void foo()\n"
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"{\n"
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" list<int> l1;\n"
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" list<int> l2;\n"
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" list<int>::iterator it = l1.begin();\n"
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" l2.insert(it, 0);\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:6]: (error) Same iterator is used with both l1 and l2\n", errout.str());
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}
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void iterator4()
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{
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check("void foo(std::vector<std::string> &test)\n"
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"{\n"
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" std::set<int> result;\n"
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" for (std::vector<std::string>::const_iterator cit = test.begin();\n"
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" cit != test.end();\n"
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" ++cit)\n"
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" {\n"
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" result.insert(cit->size());\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 iterator5()
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{
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check("void foo()\n"
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"{\n"
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" std::vector<int> ints1;\n"
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" std::vector<int> ints2;\n"
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" std::vector<int>::iterator it = std::find(ints1.begin(), ints2.end(), 22);\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:5]: (error) mismatching containers\n", errout.str());
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}
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// Dereferencing invalid pointer
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void dereference()
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{
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check("void f()\n"
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"{\n"
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" std::vector<int> ints;"
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" std::vector<int>::iterator iter;\n"
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" iter = ints.begin() + 2;\n"
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" ints.erase(iter);\n"
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" std::cout << (*iter) << std::endl;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:6]: (error) Dereferenced iterator 'iter' has been erased\n", errout.str());
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}
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void dereference_member()
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{
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check("void f()\n"
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"{\n"
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" std::map<int, int> ints;"
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" std::map<int, int>::iterator iter;\n"
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" iter = ints.begin();\n"
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" ints.erase(iter);\n"
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" std::cout << iter->first << std::endl;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:6]: (error) Dereferenced iterator 'iter' has been erased\n", errout.str());
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}
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void STLSize()
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{
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check("void foo()\n"
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"{\n"
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" std::vector<int> foo;\n"
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" for (unsigned int ii = 0; ii <= foo.size(); ++ii)\n"
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" {\n"
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" foo[ii] = 0;\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:6]: (error) When ii==foo.size(), foo[ii] is out of bounds\n", errout.str());
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check("void foo()\n"
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"{\n"
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" std::vector<int> foo;\n"
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" foo.push_back(1);\n"
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" for (unsigned int ii = 0; ii <= foo.size(); ++ii)\n"
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" {\n"
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" }\n"
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" int ii = 0;\n"
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" foo[ii] = 0;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void STLSizeNoErr()
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{
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{
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check("void foo()\n"
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"{\n"
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" std::vector<int> foo;\n"
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" for (unsigned int ii = 0; ii < foo.size(); ++ii)\n"
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" {\n"
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" foo[ii] = 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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{
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check("void foo()\n"
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"{\n"
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" std::vector<int> foo;\n"
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" for (unsigned int ii = 0; ii <= foo.size(); ++ii)\n"
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" {\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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{
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check("void foo()\n"
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"{\n"
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" std::vector<int> foo;\n"
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" for (unsigned int ii = 0; ii <= foo.size(); ++ii)\n"
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" {\n"
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" if (ii == foo.size())\n"
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" {\n"
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" }\n"
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" else\n"
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" {\n"
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" foo[ii] = 0;\n"
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" }\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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}
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void erase()
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{
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{
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check("void f()\n"
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"{\n"
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" for (it = foo.begin(); it != foo.end(); ++it)\n"
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" {\n"
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" foo.erase(it);\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:5]: (error) Dangerous usage of erase\n", errout.str());
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}
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{
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check("for (it = foo.begin(); it != foo.end(); ++it)\n"
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"{\n"
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" foo.erase(it);\n"
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"}\n"
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"for (it = foo.begin(); it != foo.end(); ++it)\n"
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"{\n"
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" foo.erase(it);\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (error) Dangerous usage of erase\n[test.cpp:7]: (error) Dangerous usage of erase\n", errout.str());
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}
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}
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void eraseBreak()
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{
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check("void f()\n"
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"{\n"
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" for (it = foo.begin(); it != foo.end(); ++it)\n"
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" {\n"
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" foo.erase(it);\n"
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" break;\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 eraseReturn()
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{
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check("void f()\n"
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"{\n"
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" for (it = foo.begin(); it != foo.end(); ++it)\n"
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" {\n"
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" foo.erase(it);\n"
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" return;\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 eraseGoto()
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{
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check("void f()\n"
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"{\n"
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" for (it = foo.begin(); it != foo.end(); ++it)\n"
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" {\n"
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" foo.erase(it);\n"
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" goto abc;\n"
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" }\n"
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"bar:\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void eraseAssign()
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{
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check("void f()\n"
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"{\n"
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" for (it = foo.begin(); it != foo.end(); ++it)\n"
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" {\n"
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" foo.erase(it);\n"
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" it = foo.begin();\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 eraseErase()
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{
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check("void f(std::vector<ints> &ints)\n"
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"{\n"
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" std::vector<int>::iterator iter;\n"
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" iter = ints.begin() + 2;\n"
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" ints.erase(iter);\n"
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" ints.erase(iter);\n"
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"}\n");
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TODO_ASSERT_EQUALS("[test.cpp:6]: (error) Erasing invalid iterator\n", errout.str());
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}
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void pushback1()
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{
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check("void f()\n"
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"{\n"
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" std::vector<int>::const_iterator it = foo.begin();\n"
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" foo.push_back(123);\n"
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" *it;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:5]: (error) After push_back, the iterator 'it' may be invalid\n", errout.str());
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}
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void pushback2()
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{
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check("void f()\n"
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"{\n"
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" std::vector<int>::const_iterator it = foo.begin();\n"
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" foo.push_back(123);\n"
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" {\n"
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" int *it = &foo[0];\n"
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" *it = 456;\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 pushback3()
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{
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check("void f()\n"
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"{\n"
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" std::vector<int> foo;\n"
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" foo.push_back(10);\n"
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" std::vector<int>::iterator it;\n"
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" for (it = foo.begin(); it != foo.end(); ++it)\n"
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" {\n"
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" foo.push_back(123);\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:8]: (error) After push_back, the iterator 'it' may be invalid\n", errout.str());
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}
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void pushback4()
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{
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check("void f()\n"
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"{\n"
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" std::vector<int> ints;\n"
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" ints.push_back(1);\n"
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" int *first = &ints[0];\n"
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" ints.push_back(2);\n"
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" *first;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:7]: (error) Invalid pointer 'first' after push_back / push_front\n", errout.str());
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}
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void pushback5()
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{
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check("void f()\n"
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"{\n"
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" std::vector<int>::const_iterator i;\n"
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"\n"
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" for (i=v.begin(); i!=v.end(); ++i)\n"
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" {\n"
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" }\n"
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"\n"
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" for (i=rhs.v.begin(); i!=rhs.v.end(); ++i)\n"
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" {\n"
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" v.push_back(*i);\n"
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" }\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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}
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void pushback6()
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{
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// ticket #735
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check("void f()\n"
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"{\n"
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" vector<int> v;\n"
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" vector.push_back(1);\n"
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" vector.push_back(2);\n"
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" for (vector<int>::iterator it = v.begin(); it != v.end(); ++it)\n"
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" {\n"
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" if (*it == 1)\n"
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" v.push_back(10);\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:9]: (error) After push_back, the iterator 'it' may be invalid\n", errout.str());
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check("void f()\n"
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"{\n"
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" std::vector<int> v;\n"
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" vector.push_back(1);\n"
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" vector.push_back(2);\n"
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" for (std::vector<int>::iterator it = v.begin(); it != v.end(); ++it)\n"
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" {\n"
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" if (*it == 1)\n"
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" v.push_back(10);\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:9]: (error) After push_back, the iterator 'it' may be invalid\n", errout.str());
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}
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void pushback7()
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{
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check("void f()\n"
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"{\n"
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" std::vector<int> foo;\n"
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" foo.push_back(10);\n"
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" std::vector<int>::iterator it;\n"
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" for (it = foo.begin(); it != foo.end(); it++)\n"
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" {\n"
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" foo.push_back(123);\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:8]: (error) After push_back, the iterator 'it' may be invalid\n", errout.str());
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}
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void pushback8()
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{
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check("void f()\n"
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"{\n"
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" std::vector<int> ints;\n"
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" std::vector<int>::const_iterator end = ints.end();\n"
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" ints.push_back(10);\n"
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" std::vector<int>::iterator it;\n"
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" unsigned int sum = 0;\n"
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" for (it = ints.begin(); it != end; ++it)\n"
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" {\n"
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" sum += *it;\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:8]: (error) After push_back, the iterator 'end' may be invalid\n", errout.str());
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}
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void insert1()
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{
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check("void f(std::vector<int> &ints)\n"
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"{\n"
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" std::vector<int>::iterator iter = ints.begin() + 5;\n"
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" ints.insert(ints.begin(), 1);\n"
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" ++iter;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:5]: (error) After insert, the iterator 'iter' may be invalid\n", errout.str());
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}
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void invalidcode()
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{
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errout.str("");
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const std::string src = "void f()\n"
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"{\n"
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" for ( \n"
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"}\n";
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Tokenizer tokenizer(0, this);
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std::istringstream istr(src);
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ASSERT_EQUALS(false, tokenizer.tokenize(istr, "test.cpp"));
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ASSERT_EQUALS("[test.cpp:1]: (error) Invalid number of character ((). Can't process file.\n", errout.str());
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}
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void stlBoundries1()
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{
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const int STL_CONTAINER_LIST = 9;
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const std::string stlCont[STL_CONTAINER_LIST] =
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{"deque", "list", "set", "multiset", "map",
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"multimap", "hash_map", "hash_multimap", "hash_set"
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};
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for (int i = 0; i < STL_CONTAINER_LIST; ++i)
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{
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const std::string checkStr("void f()\n"
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"{\n"
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" std::" + stlCont[i] + "<int>::iterator it;\n"
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" for (it = ab.begin(); it < ab.end(); ++it)\n"
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" ;\n"
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"}\n");
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check(checkStr.c_str());
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ASSERT_EQUALS("[test.cpp:4]: (error) " + stlCont[i] + " range check should use != and not < since the order of the pointers isn't guaranteed\n", errout.str());
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}
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}
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|
|
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void stlBoundries2()
|
|
{
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const std::string checkStr("void f()\n"
|
|
"{\n"
|
|
" std::vector<std::string> files;\n"
|
|
" std::vector<std::string>::const_iterator it;\n"
|
|
" for (it = files.begin(); it < files.end(); it++) { }\n"
|
|
" for (it = files.begin(); it < files.end(); it++) { };\n"
|
|
"}\n");
|
|
|
|
check(checkStr.c_str());
|
|
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void stlBoundries3()
|
|
{
|
|
const std::string checkStr("void f()\n"
|
|
"{\n"
|
|
" set<int> files;\n"
|
|
" set<int>::const_iterator current;\n"
|
|
" for (current = files.begin(); current != files.end(); ++current)\n"
|
|
" {\n"
|
|
" assert(*current < 100)\n"
|
|
" }\n"
|
|
"}\n");
|
|
|
|
check(checkStr.c_str());
|
|
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
};
|
|
|
|
REGISTER_TEST(TestStl)
|