/* * Cppcheck - A tool for static C/C++ code analysis * Copyright (C) 2007-2009 Daniel Marjamäki, Reijo Tomperi, Nicolas Le Cam, * Leandro Penz, Kimmo Varis, Vesa Pikki * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see extern std::ostringstream errout; class TestOther : public TestFixture { public: TestOther() : TestFixture("TestOther") { } private: void run() { TEST_CASE(delete1); TEST_CASE(delete2); TEST_CASE(unreachable1); TEST_CASE(sprintf1); // Dangerous usage of sprintf TEST_CASE(sprintf2); TEST_CASE(sprintf3); TEST_CASE(sprintf4); // struct member TEST_CASE(strPlusChar1); // "/usr" + '/' TEST_CASE(strPlusChar2); // "/usr" + ch TEST_CASE(strPlusChar3); // ok: path + "/sub" + '/' TEST_CASE(returnLocalVariable1); TEST_CASE(varScope1); TEST_CASE(varScope2); } void check(const char code[]) { // Tokenize.. Tokenizer tokenizer; std::istringstream istr(code); tokenizer.tokenize(istr, "test.cpp"); // Clear the error buffer.. errout.str(""); // Check for redundant code.. Settings settings; CheckOther checkOther(&tokenizer, &settings, this); checkOther.WarningRedundantCode(); } void delete1() { check("void foo()\n" "{\n" " if (p)\n" " {\n" " delete p;\n" " p = 0;\n" " }\n" "}\n"); ASSERT_EQUALS(std::string(""), errout.str()); } void delete2() { check("void foo()\n" "{\n" " if (p)\n" " {\n" " delete p;\n" " }\n" "}\n"); ASSERT_EQUALS(std::string("[test.cpp:3]: (style) Redundant condition. It is safe to deallocate a NULL pointer\n"), errout.str()); check("void foo()\n" "{\n" " if (p)\n" " delete p;\n" "}\n"); ASSERT_EQUALS(std::string("[test.cpp:3]: (style) Redundant condition. It is safe to deallocate a NULL pointer\n"), errout.str()); } void unreachable1() { check("void foo()\n" "{\n" " switch (p)\n" " {\n" " default:\n" " return 0;\n" " break;\n" " }\n" "}\n"); ASSERT_EQUALS(std::string(""), errout.str()); } void sprintfUsage(const char code[]) { // Tokenize.. Tokenizer tokenizer; std::istringstream istr(code); tokenizer.tokenize(istr, "test.cpp"); tokenizer.setVarId(); //tokenizer.tokens()->printOut( "tokens" ); // Clear the error buffer.. errout.str(""); // Check for redundant code.. Settings settings; CheckOther checkOther(&tokenizer, &settings, this); checkOther.InvalidFunctionUsage(); } void sprintf1() { sprintfUsage("void foo()\n" "{\n" " char buf[100];\n" " sprintf(buf,\"%s\",buf);\n" "}\n"); ASSERT_EQUALS(std::string("[test.cpp:4]: (error) Overlapping data buffer buf\n"), errout.str()); } void sprintf2() { sprintfUsage("void foo()\n" "{\n" " char buf[100];\n" " sprintf(buf,\"%i\",sizeof(buf));\n" "}\n"); ASSERT_EQUALS(std::string(""), errout.str()); } void sprintf3() { sprintfUsage("void foo()\n" "{\n" " char buf[100];\n" " sprintf(buf,\"%i\",sizeof(buf));\n" " if (buf[0]);\n" "}\n"); ASSERT_EQUALS(std::string(""), errout.str()); } void sprintf4() { sprintfUsage("struct A\n" "{\n" " char filename[128];\n" "};\n" "\n" "void foo()\n" "{\n" " const char* filename = \"hello\";\n" " struct A a;\n" " snprintf(a.filename, 128, \"%s\", filename);\n" "}\n"); ASSERT_EQUALS(std::string(""), errout.str()); } void strPlusChar(const char code[]) { // Tokenize.. Tokenizer tokenizer; std::istringstream istr(code); tokenizer.tokenize(istr, "test.cpp"); tokenizer.setVarId(); // Clear the error buffer.. errout.str(""); // Check for redundant code.. Settings settings; CheckOther checkOther(&tokenizer, &settings, this); checkOther.strPlusChar(); } void strPlusChar1() { // Strange looking pointer arithmetic.. strPlusChar("void foo()\n" "{\n" " const char *p = \"/usr\" + '/';\n" "}\n"); ASSERT_EQUALS(std::string("[test.cpp:3]: (error) Unusual pointer arithmetic\n"), errout.str()); } void strPlusChar2() { // Strange looking pointer arithmetic.. strPlusChar("void foo()\n" "{\n" " char ch = '/';\n" " const char *p = \"/usr\" + ch;\n" "}\n"); ASSERT_EQUALS(std::string("[test.cpp:4]: (error) Unusual pointer arithmetic\n"), errout.str()); } void strPlusChar3() { // Strange looking pointer arithmetic.. strPlusChar("void foo()\n" "{\n" " std::string temp = \"/tmp\";\n" " std::string path = temp + '/' + \"sub\" + '/';\n" "}\n"); ASSERT_EQUALS(std::string(""), errout.str()); } void retVar(const char code[]) { // Tokenize.. Tokenizer tokenizer; std::istringstream istr(code); tokenizer.tokenize(istr, "test.cpp"); tokenizer.setVarId(); // Clear the error buffer.. errout.str(""); // Check for redundant code.. Settings settings; CheckOther checkOther(&tokenizer, &settings, this); checkOther.returnPointerToStackData(); } void returnLocalVariable1() { retVar("char *foo()\n" "{\n" " char str[100] = {0};\n" " return str;\n" "}\n"); ASSERT_EQUALS(std::string("[test.cpp:4]: (error) Returning pointer to local array variable\n"), errout.str()); } void varScope(const char code[]) { // Tokenize.. Tokenizer tokenizer; std::istringstream istr(code); tokenizer.tokenize(istr, "test.cpp"); tokenizer.simplifyTokenList(); // Clear the error buffer.. errout.str(""); // Check for redundant code.. Settings settings; settings._checkCodingStyle = true; CheckOther checkOther(&tokenizer, &settings, this); checkOther.CheckVariableScope(); } void varScope1() { varScope("unsigned short foo()\n" "{\n" " test_client CClient;\n" " try\n" " {\n" " if (CClient.Open())\n" " {\n" " return 0;\n" " }\n" " }\n" " catch (...)\n" " {\n" " return 2;\n" " }\n" "\n" " try\n" " {\n" " CClient.Close();\n" " }\n" " catch (...)\n" " {\n" " return 2;\n" " }\n" "\n" " return 1;\n" "}\n"); ASSERT_EQUALS(std::string(""), errout.str()); } void varScope2() { varScope("int foo()\n" "{\n" " Error e;\n" " e.SetValue(12);\n" " throw e;\n" "}\n"); ASSERT_EQUALS(std::string(""), errout.str()); } }; REGISTER_TEST(TestOther)