583 lines
15 KiB
C++
583 lines
15 KiB
C++
/*
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* c++check - c/c++ syntax checking
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* Copyright (C) 2007 Daniel Marjamäki
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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 "tokenize.h"
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#include "CheckMemoryLeak.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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extern bool ShowAll;
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class TestMemleak : public TestFixture
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{
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public:
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TestMemleak() : TestFixture("TestMemleak")
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{ }
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private:
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void check( const char code[] )
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{
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// Tokenize..
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tokens = tokens_back = NULL;
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std::istringstream istr(code);
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TokenizeCode( istr );
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SimplifyTokenList();
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// Clear the error buffer..
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errout.str("");
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// Check for memory leaks..
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ShowAll = false;
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CheckMemoryLeak();
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}
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void run()
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{
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TEST_CASE( simple1 );
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TEST_CASE( simple2 );
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TEST_CASE( simple3 );
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TEST_CASE( simple4 );
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TEST_CASE( simple5 );
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TEST_CASE( simple6 );
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TEST_CASE( simple7 );
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TEST_CASE( simple8 );
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TEST_CASE( ifelse1 );
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TEST_CASE( ifelse2 );
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TEST_CASE( ifelse3 );
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TEST_CASE( ifelse4 );
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TEST_CASE( ifelse5 );
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TEST_CASE( forwhile1 );
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TEST_CASE( forwhile2 );
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TEST_CASE( forwhile3 );
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TEST_CASE( forwhile4 );
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TEST_CASE( switch1 );
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TEST_CASE( switch2 );
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TEST_CASE( mismatch1 );
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TEST_CASE( func1 );
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TEST_CASE( func2 );
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TEST_CASE( class1 );
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TEST_CASE( class2 );
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}
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void simple1()
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{
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check( "void f()\n"
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"{\n"
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" int *a = new int[10];\n"
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"}\n" );
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ASSERT_EQUALS( std::string("[test.cpp:4]: Memory leak: a\n"), errout.str() );
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}
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void simple2()
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{
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check( "Fred *NewFred()\n"
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"{\n"
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" Fred *f = new Fred;\n"
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" return f;\n"
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"}\n" );
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ASSERT_EQUALS( std::string(""), errout.str() );
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}
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void simple3()
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{
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check( "static char *f()\n"
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"{\n"
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" char *s = new char[100];\n"
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" return (char *)s;\n"
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"}\n" );
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ASSERT_EQUALS( std::string(""), errout.str() );
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}
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void simple4()
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{
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check( "static char *f()\n"
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"{\n"
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" char *s = new char[100];\n"
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" return 0;\n"
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"}\n" );
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ASSERT_EQUALS( std::string("[test.cpp:4]: Memory leak: s\n"), errout.str() );
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}
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void simple5()
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{
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check( "static char *f()\n"
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"{\n"
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" struct *str = new strlist;\n"
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" return &str->s;\n"
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"}\n" );
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ASSERT_EQUALS( std::string(""), errout.str() );
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}
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void simple6()
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{
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check( "static void f()\n"
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"{\n"
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" char *str = strdup(\"hello\");\n"
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" char *str2 = (char *)str;\n"
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" free(str2);\n"
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"}\n" );
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ASSERT_EQUALS( std::string(""), errout.str() );
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}
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void simple7()
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{
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// A garbage collector may delete f automaticly
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check( "class Fred;\n"
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"void foo()\n"
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"{\n"
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" Fred *f = new Fred;\n"
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"}\n" );
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ASSERT_EQUALS( std::string(""), errout.str() );
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}
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void simple8()
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{
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check( "char * foo ()\n"
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"{\n"
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" char *str = strdup(\"abc\");\n"
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" if (somecondition)\n"
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" for (i = 0; i < 2; i++)\n"
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" { }\n"
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" return str;\n"
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"}\n" );
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ASSERT_EQUALS( std::string(""), errout.str() );
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}
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void ifelse1()
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{
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check( "void f()\n"
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"{\n"
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" int *a = new int[10];\n"
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" if (a)\n"
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" {\n"
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" delete [] a;\n"
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" }\n"
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"}\n" );
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ASSERT_EQUALS( std::string(""), errout.str() );
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}
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void ifelse2()
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{
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check( "void f()\n"
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"{\n"
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" char *str = strdup(\"hello\");\n"
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" if (somecondition)\n"
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" {\n"
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" return;\n"
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" }\n"
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" free(str);\n"
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"}\n" );
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ASSERT_EQUALS( std::string("[test.cpp:6]: Memory leak: str\n"), errout.str() );
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}
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void ifelse3()
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{
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check( "void f()\n"
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"{\n"
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" char *str = strdup(\"hello\");\n"
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" if (a==b)\n"
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" {\n"
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" free(str);\n"
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" return;\n"
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" }\n"
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"}\n" );
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ASSERT_EQUALS( std::string("[test.cpp:9]: Memory leak: str\n"), errout.str() );
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}
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void ifelse4()
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{
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check( "void f()\n"
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"{\n"
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" char *str = new char[10];\n"
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" if (a==b)\n"
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" {\n"
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" delete [] str;\n"
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" return;\n"
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" }\n"
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" delete [] str;\n"
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"}\n" );
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ASSERT_EQUALS( std::string(""), errout.str() );
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}
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void ifelse5()
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{
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check( "void f()\n"
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"{\n"
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" char *str;\n"
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" if (somecondition)\n"
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" {\n"
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" str = new char[100];\n"
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" }\n"
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" else\n"
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" {\n"
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" return;\n"
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" }\n"
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" delete [] str;\n"
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"}\n" );
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ASSERT_EQUALS( std::string(""), errout.str() );
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}
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void ifelse6()
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{
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check( "static char *f()\n"
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"{\n"
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" char *s = new char[100];\n"
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" if ( a == b )\n"
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" {\n"
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" return s;\n"
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" }\n"
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" return NULL;\n"
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"}\n" );
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ASSERT_EQUALS( std::string("[test.cpp:8]: Memory leak: s\n"), errout.str() );
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}
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void ifelse7()
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{
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check( "static char *f()\n"
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"{\n"
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" char *s;\n"
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" if ( abc )\n"
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" {\n"
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" s = new char[10];\n"
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" }\n"
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" return s;\n"
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"}\n" );
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ASSERT_EQUALS( std::string(""), errout.str() );
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}
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void ifelse8()
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{
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check( "static char *f()\n"
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"{\n"
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" char *s = new char[10];\n"
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" if ( s )\n"
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" {\n"
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" return s;\n"
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" }\n"
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" return 0;\n"
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"}\n" );
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ASSERT_EQUALS( std::string(""), errout.str() );
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}
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void forwhile1()
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{
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check("void f()\n"
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"{\n"
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" char *str = strdup(\"hello\");\n"
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" while (condition)\n"
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" {\n"
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" if (condition)\n"
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" {\n"
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" break;\n"
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" }\n"
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" }\n"
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" free(str);\n"
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"}\n");
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ASSERT_EQUALS( std::string(""), errout.str() );
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}
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void forwhile2()
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{
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check("void f()\n"
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"{\n"
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" for (int i = 0; i < j; i++)\n"
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" {\n"
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" char *str = strdup(\"hello\");\n"
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" if (condition)\n"
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" continue;\n"
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" free(str);\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS( std::string("[test.cpp:7]: Memory leak: str\n"), errout.str() );
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}
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void forwhile3()
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{
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check( "void f()\n"
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"{\n"
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" char *str = 0;\n"
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" for (int i = 0; i < 10; i++)\n"
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" {\n"
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" str = strdup(\"hello\");\n"
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" }\n"
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" free(str);\n"
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"}\n" );
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ASSERT_EQUALS( std::string("[test.cpp:4]: Memory leak: str\n"), errout.str() );
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}
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void forwhile4()
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{
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check( "void f()\n"
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"{\n"
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" char *str = 0;\n"
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" for (int i = 0; i < 10; i++)\n"
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" {\n"
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" str = strdup(\"hello\");\n"
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" if (str) { }\n"
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" }\n"
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" free(str);\n"
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"}\n" );
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ASSERT_EQUALS( std::string("[test.cpp:4]: Memory leak: str\n"), errout.str() );
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}
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void switch1()
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{
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check("void f()\n"
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"{\n"
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" char *str = new char[10];\n"
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" switch (abc)\n"
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" {\n"
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" case 1:\n"
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" break;\n"
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" };\n"
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" delete [] str;\n"
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"}\n");
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ASSERT_EQUALS( std::string(""), errout.str() );
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}
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void switch2()
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{
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check("void f()\n"
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"{\n"
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" char *str = new char[10];\n"
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" switch (abc)\n"
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" {\n"
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" case 1:\n"
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" delete [] str;\n"
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" break;\n"
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" default:\n"
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" break;\n"
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" };\n"
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"}\n");
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ASSERT_EQUALS( std::string("[test.cpp:12]: Memory leak: str\n"), errout.str() );
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}
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void mismatch1()
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{
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check( "void f()\n"
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"{\n"
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" int *a = new int[10];\n"
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" free(a);\n"
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"}\n");
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ASSERT_EQUALS( std::string("[test.cpp:4]: Mismatching allocation and deallocation: a\n"), errout.str() );
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}
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////////////////////////////////////////////////
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// function calls
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////////////////////////////////////////////////
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void func1()
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{
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check( "static void f()\n"
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"{\n"
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" char *p = new char[100];\n"
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" foo(p);\n"
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"}\n" );
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ASSERT_EQUALS( std::string(""), errout.str() );
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}
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void func2()
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{
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check( "static void f()\n"
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"{\n"
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" char *p = new char[100];\n"
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" foo.add(p);\n"
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"}\n" );
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ASSERT_EQUALS( std::string(""), errout.str() );
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}
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/*
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void func3()
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{
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check( "static char *dmalloc()\n"
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"{\n"
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" char *p = new char[100];\n"
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" return p;\n"
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"}\n"
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"static void f()\n"
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"{\n"
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" char *p = dmalloc();\n"
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"}\n" );
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ASSERT_EQUALS( std::string("[test.cpp:9]: Memory leak: p\n"), errout.str() );
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}
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void func4()
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{
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check( "static char *dmalloc()\n"
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"{\n"
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" char *p = new char[100];\n"
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" return p;\n"
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"}\n"
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"static void f()\n"
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"{\n"
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" char *p = dmalloc();\n"
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" delete p;\n"
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"}\n" );
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ASSERT_EQUALS( std::string("[test.cpp:9]: Mismatching allocation and deallocation: p\n"), errout.str() );
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}
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void func5()
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{
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check( "static void foo(const char *str)\n"
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"{ }\n"
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"\n"
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"static void f()\n"
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"{\n"
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" char *p = new char[100];\n"
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" foo(p);\n"
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"}\n" );
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ASSERT_EQUALS( std::string("[test.cpp:8]: Memory leak: p\n"), errout.str() );
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}
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void func6()
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{
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check( "struct ab\n"
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"{\n"
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" int a;\n"
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" int b;\n"
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"};\n"
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"\n"
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"static void f()\n"
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"{\n"
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" struct ab *p = malloc(sizeof(struct ab));\n"
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" foo(&p->b);\n"
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"}\n" );
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ASSERT_EQUALS( std::string("[test.cpp:11]: Memory leak: p\n"), errout.str() );
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}
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*/
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void class1()
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{
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check( "class Fred\n"
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"{\n"
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"private:\n"
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" char *str1;\n"
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" char *str2;\n"
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"public:\n"
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" Fred();\n"
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" ~Fred();\n"
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"};\n"
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"\n"
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"Fred::Fred()\n"
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"{\n"
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" str1 = new char[10];\n"
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" str2 = new char[10];\n"
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"}\n"
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"\n"
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"Fred::~Fred()\n"
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"{\n"
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" delete [] str2;\n"
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"}\n" );
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ASSERT_EQUALS( std::string("[test.cpp:1]: Memory leak: Fred::str1\n"), errout.str() );
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}
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void class2()
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{
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check( "class Fred\n"
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"{\n"
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"private:\n"
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" char *str1;\n"
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"public:\n"
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" Fred();\n"
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" ~Fred();\n"
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"};\n"
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"\n"
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"Fred::Fred()\n"
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"{\n"
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" str1 = new char[10];\n"
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"}\n"
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"\n"
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"Fred::~Fred()\n"
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"{\n"
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" free(str1);\n"
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"}\n" );
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ASSERT_EQUALS( std::string("[test.cpp:17]: Mismatching allocation and deallocation: Fred::str1\n"), errout.str() );
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}
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};
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REGISTER_TEST( TestMemleak )
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