cppcheck/test/testnonreentrantfunctions.cpp

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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2011 Daniel Marjamäki and 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 <http://www.gnu.org/licenses/>.
*/
#include "tokenize.h"
#include "checknonreentrantfunctions.h"
#include "testsuite.h"
#include <sstream>
extern std::ostringstream errout;
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class TestNonReentrantFunctions : public TestFixture {
public:
TestNonReentrantFunctions() : TestFixture("TestNonReentrantFunctions")
{ }
private:
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void run() {
TEST_CASE(test_crypt);
TEST_CASE(test_namespace_handling);
}
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void check(const char code[]) {
// Clear the error buffer..
errout.str("");
Settings settings;
settings.standards.posix = true;
settings.addEnabled("portability");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList();
// Assign variable ids
tokenizer.setVarId();
// Check for non reentrant functions..
CheckNonReentrantFunctions checkNonReentrantFunctions(&tokenizer, &settings, this);
checkNonReentrantFunctions.nonReentrantFunctions();
}
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void test_crypt() {
check("void f(char *pwd)\n"
"{\n"
" char *cpwd;"
" crypt(pwd, cpwd);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (portability) Found non reentrant function 'crypt'. For threadsafe applications it is recommended to use the reentrant replacement function 'crypt_r'\n", errout.str());
check("void f()\n"
"{\n"
" char *pwd = getpass(\"Password:\");"
" char *cpwd;"
" crypt(pwd, cpwd);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (portability) Found non reentrant function 'crypt'. For threadsafe applications it is recommended to use the reentrant replacement function 'crypt_r'\n", errout.str());
check("int f()\n"
"{\n"
" int crypt = 0;"
" return crypt;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void test_namespace_handling() {
check("int f()\n"
"{\n"
" time_t t = 0;"
" std::localtime(&t);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (portability) Found non reentrant function 'localtime'. For threadsafe applications it is recommended to use the reentrant replacement function 'localtime_r'\n", errout.str());
// Passed as function argument
check("int f()\n"
"{\n"
" printf(\"Magic guess: %d\n\", rand());\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (portability) Found non reentrant function 'rand'. For threadsafe applications it is recommended to use the reentrant replacement function 'rand_r'\n", errout.str());
// Pass return value
check("int f()\n"
"{\n"
" time_t t = 0;"
" struct tm *foo = localtime(&t);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (portability) Found non reentrant function 'localtime'. For threadsafe applications it is recommended to use the reentrant replacement function 'localtime_r'\n", errout.str());
// Access via global namespace
check("int f()\n"
"{\n"
" ::rand();\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (portability) Found non reentrant function 'rand'. For threadsafe applications it is recommended to use the reentrant replacement function 'rand_r'\n", errout.str());
// Be quiet on function definitions
check("int rand()\n"
"{\n"
" return 123;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
// Be quiet on other namespaces
check("int f()\n"
"{\n"
" foobar::rand();\n"
"}\n");
ASSERT_EQUALS("", errout.str());
// Be quiet on class member functions
check("int f()\n"
"{\n"
" foobar.rand();\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
};
REGISTER_TEST(TestNonReentrantFunctions)