/* * Cppcheck - A tool for static C/C++ code analysis * Copyright (C) 2007-2015 Cppcheck team. * * 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 . */ #include "tokenize.h" #include "checkobsolescentfunctions.h" #include "testsuite.h" class TestObsoleteFunctions : public TestFixture { public: TestObsoleteFunctions() : TestFixture("TestObsoleteFunctions") { } private: Settings settings; void run() { settings.addEnabled("style"); settings.standards.posix = true; settings.standards.c = Standards::C11; TEST_CASE(testbsd_signal); TEST_CASE(testgethostbyname); TEST_CASE(testgethostbyaddr); TEST_CASE(testusleep); TEST_CASE(testindex); TEST_CASE(test_qt_index); // FP when using the Qt function 'index'? TEST_CASE(testrindex); // no false positives for variables TEST_CASE(testvar); // dangerous function TEST_CASE(testgets); TEST_CASE(testalloca); // declared function ticket #3121 TEST_CASE(test_declared_function); // test std::gets TEST_CASE(test_std_gets); // multiple use of obsolete functions TEST_CASE(test_multiple); // c declared function TEST_CASE(test_c_declaration); // function with body TEST_CASE(test_function_with_body); // null pointer dereference in obsoleteFunctions TEST_CASE(ticket3238); } void check(const char code[], const char filename[]="test.cpp") { // Clear the error buffer.. errout.str(""); // Tokenize.. Tokenizer tokenizer(&settings, this); std::istringstream istr(code); tokenizer.tokenize(istr, filename); tokenizer.simplifyTokenList2(); // Check for obsolete functions.. CheckObsoleteFunctions checkObsoleteFunctions(&tokenizer, &settings, this); checkObsoleteFunctions.obsoleteFunctions(); } void testbsd_signal() { check("void f()\n" "{\n" " bsd_signal(SIGABRT, SIG_IGN);\n" "}"); ASSERT_EQUALS("[test.cpp:3]: (style) Obsolete function 'bsd_signal' called. It is recommended to use the function 'sigaction' instead.\n", errout.str()); check("int f()\n" "{\n" " int bsd_signal(0);\n" " return bsd_signal;\n" "}"); ASSERT_EQUALS("", errout.str()); } void testgethostbyname() { check("void f()\n" "{\n" " struct hostent *hp;\n" " if(!hp = gethostbyname('127.0.0.1')) {\n" " exit(1);\n" " }\n" "}"); ASSERT_EQUALS("[test.cpp:4]: (style) Obsolete function 'gethostbyname' called. It is recommended to use the function 'getaddrinfo' instead.\n", errout.str()); } void testgethostbyaddr() { check("void f()\n" "{\n" " long addr;\n" " addr = inet_addr('127.0.0.1');\n" " if(!hp = gethostbyaddr((char *) &addr, sizeof(addr), AF_INET)) {\n" " exit(1);\n" " }\n" "}"); ASSERT_EQUALS("[test.cpp:5]: (style) Obsolete function 'gethostbyaddr' called. It is recommended to use the function 'getnameinfo' instead.\n", errout.str()); } void testusleep() { check("void f()\n" "{\n" " usleep( 1000 );\n" "}"); ASSERT_EQUALS("[test.cpp:3]: (style) Obsolete function 'usleep' called. It is recommended to use the 'nanosleep' or 'setitimer' function instead.\n", errout.str()); } void testindex() { check("namespace n1 {\n" " int index(){};\n" "}\n" "int main()\n" "{\n" " n1::index();\n" "}"); ASSERT_EQUALS("", errout.str()); check("std::size_t f()\n" "{\n" " std::size_t index(0);\n" " index++;\n" " return index;\n" "}"); ASSERT_EQUALS("", errout.str()); check("int f()\n" "{\n" " return this->index();\n" "}"); ASSERT_EQUALS("", errout.str()); check("void f()\n" "{\n" " int index( 0 );\n" "}"); ASSERT_EQUALS("", errout.str()); check("const char f()\n" "{\n" " const char var[6] = 'index';\n" " const char i = index(var, 0);\n" " return i;\n" "}"); ASSERT_EQUALS("[test.cpp:4]: (style) Obsolete function 'index' called. It is recommended to use the function 'strchr' instead.\n", errout.str()); } void test_qt_index() { check("void TDataModel::forceRowRefresh(int row) {\n" " emit dataChanged(index(row, 0), index(row, columnCount() - 1));\n" "}"); ASSERT_EQUALS("[test.cpp:2]: (style) Obsolete function 'index' called. It is recommended to use the function 'strchr' instead.\n", errout.str()); } void testrindex() { check("void f()\n" "{\n" " int rindex( 0 );\n" "}"); ASSERT_EQUALS("", errout.str()); check("void f()\n" "{\n" " const char var[7] = 'rindex';\n" " print(rindex(var, 0));\n" "}"); ASSERT_EQUALS("[test.cpp:4]: (style) Obsolete function 'rindex' called. It is recommended to use the function 'strrchr' instead.\n", errout.str()); } void testvar() { check("class Fred {\n" "public:\n" " Fred() : index(0) { }\n" " int index;\n" "};"); ASSERT_EQUALS("", errout.str()); } void testgets() { check("void f()\n" "{\n" " char *x = gets();\n" "}"); ASSERT_EQUALS("[test.cpp:3]: (style) Obsolete function 'gets' called. It is recommended to use the function 'fgets' instead.\n", errout.str()); check("void f()\n" "{\n" " foo(x, gets());\n" "}"); ASSERT_EQUALS("[test.cpp:3]: (style) Obsolete function 'gets' called. It is recommended to use the function 'fgets' instead.\n", errout.str()); } void testalloca() { check("void f()\n" "{\n" " char *x = alloca(10);\n" "}\n", "test.cpp"); // #4382 - there are no VLAs in C++ ASSERT_EQUALS("", errout.str()); check("void f()\n" "{\n" " char *x = alloca(10);\n" "}\n", "test.c"); ASSERT_EQUALS("[test.c:3]: (style) Obsolete function 'alloca' called. In C99 and later it is recommended to use a variable length array instead.\n", errout.str()); } // ticket #3121 void test_declared_function() { check("int ftime ( int a )\n" "{\n" " return a;\n" "}\n" "int main ()\n" "{\n" " int b ; b = ftime ( 1 ) ;\n" " return 0 ;\n" "}"); ASSERT_EQUALS("", errout.str()); } // test std::gets void test_std_gets() { check("void f(char * str)\n" "{\n" " char *x = std::gets(str);\n" " char *y = gets(str);\n" "}"); ASSERT_EQUALS("[test.cpp:3]: (style) Obsolete function 'gets' called. It is recommended to use the function 'fgets' instead.\n" "[test.cpp:4]: (style) Obsolete function 'gets' called. It is recommended to use the function 'fgets' instead.\n", errout.str()); } // multiple use void test_multiple() { check("void f(char * str)\n" "{\n" " char *x = std::gets(str);\n" " usleep( 1000 );\n" "}"); ASSERT_EQUALS("[test.cpp:3]: (style) Obsolete function 'gets' called. It is recommended to use the function 'fgets' instead.\n" "[test.cpp:4]: (style) Obsolete function 'usleep' called. It is recommended to use the 'nanosleep' or 'setitimer' function instead.\n", errout.str()); } void test_c_declaration() { check("char * gets ( char * c ) ;\n" "int main ()\n" "{\n" " char s [ 10 ] ;\n" " gets ( s ) ;\n" "}"); ASSERT_EQUALS("[test.cpp:5]: (style) Obsolete function 'gets' called. It is recommended to use the function 'fgets' instead.\n", errout.str()); check("int getcontext(ucontext_t *ucp);\n" "int f (ucontext_t *ucp)\n" "{\n" " getcontext ( ucp ) ;\n" "}"); ASSERT_EQUALS("[test.cpp:4]: (style) Obsolete function 'getcontext' called. Due to portability issues, applications are recommended to be rewritten to use POSIX threads.\n", errout.str()); } void test_function_with_body() { check("char * gets ( char * c ) { return c; }\n" "int main ()\n" "{\n" " char s [ 10 ] ;\n" " gets ( s ) ;\n" "}"); ASSERT_EQUALS("", errout.str()); } void ticket3238() { check("__FBSDID(\"...\");\n"); ASSERT_EQUALS("", errout.str()); } }; REGISTER_TEST(TestObsoleteFunctions)