953 lines
24 KiB
C++
953 lines
24 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 "CommonCheck.h"
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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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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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Tokenizer tokenizer( this );
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tokenizer.getFiles()->push_back( "test.cpp" );
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std::istringstream istr(code);
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tokenizer.TokenizeCode( istr );
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tokenizer.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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Settings settings;
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settings._checkCodingStyle = true;
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settings._showAll = false;
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tokenizer.settings( settings );
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tokenizer.FillFunctionList(0);
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CheckMemoryLeakClass checkMemoryLeak( &tokenizer, settings, this );
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checkMemoryLeak.CheckMemoryLeak();
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tokenizer.DeallocateTokens();
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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( use1 );
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TEST_CASE( use2 );
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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( ifelse6 );
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TEST_CASE( ifelse7 );
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TEST_CASE( ifelse8 );
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TEST_CASE( ifelse9 );
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TEST_CASE( if1 );
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TEST_CASE( if2 );
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TEST_CASE( if3 );
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TEST_CASE( if4 );
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TEST_CASE( if5 );
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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( forwhile5 );
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TEST_CASE( forwhile6 );
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TEST_CASE( forwhile7 );
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TEST_CASE( dowhile1 );
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TEST_CASE( switch1 );
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TEST_CASE( switch2 );
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TEST_CASE( ret1 );
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TEST_CASE( ret2 );
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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( func3 );
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TEST_CASE( func4 );
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TEST_CASE( func5 );
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TEST_CASE( func6 );
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TEST_CASE( class1 );
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TEST_CASE( class2 );
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TEST_CASE( throw1 );
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TEST_CASE( linux_list_1 );
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TEST_CASE( sizeof1 );
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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 use1()
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{
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check( "void foo()\n"
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"{\n"
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" char *str;\n"
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" if (somecondition)\n"
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" str = strdup(\"abc\");\n"
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" if (somecondition)\n"
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" DeleteString(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 use2()
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{
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check( "void foo()\n"
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"{\n"
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" char *str = strdup(\"abc\");\n"
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" if ( abc ) { memset(str, 0, 3); }\n"
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" *somestr = 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 ifelse9()
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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 ( ghfgf )\n"
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" {\n"
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" delete [] s;\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 if1()
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{
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check( "void f()\n"
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"{\n"
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" struct abc *p = new abc;\n"
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" p->a = new char[100];\n"
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" if ( ! p->a )\n"
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" return;\n"
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" foo(p);\n"
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"}\n" );
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ASSERT_EQUALS( std::string("[test.cpp:6]: Memory leak: p\n"), errout.str() );
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}
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void if2()
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{
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check( "void f()\n"
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"{\n"
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" struct smp_alt_module *smp;\n"
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" smp = kzalloc(sizeof(*smp), GFP_KERNEL);\n"
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" if (NULL == smp)\n"
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" return;\n"
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" kfree( smp );\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 if3()
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{
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check( "void f()\n"
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"{\n"
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" char *s = new char[100];\n"
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" if (0 != s)\n"
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" foo(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 if4()
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{
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check( "void f()\n"
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"{\n"
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" char *s;\n"
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" bool b = true;\n"
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" if (b && (s = malloc(256)))\n"
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" ;\n"
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" if (b)\n"
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" free(s);\n"
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"}\n" );
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std::string err( errout.str() );
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ASSERT_EQUALS( std::string(""), err );
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}
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void if5()
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{
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check( "void f()\n"
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"{\n"
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" char *p = malloc(256);\n"
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" if (somecondition && !p)\n"
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" return;\n"
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" free(p);\n"
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"}\n" );
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std::string err( errout.str() );
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ASSERT_EQUALS( std::string(""), err );
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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 forwhile5()
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{
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check( "void f(const char **a)\n"
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"{\n"
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" char *str = 0;\n"
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" for (int i = 0; i < 10 && !str; ++i)\n"
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" {\n"
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" str = strdup(a[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 forwhile6()
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{
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check( "void f(const char **a)\n"
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"{\n"
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" char *str = 0;\n"
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" for (int i = 0; i < 10 && !str; ++i)\n"
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" {\n"
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" str = strdup(a[i]);\n"
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" }\n"
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"}\n" );
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ASSERT_EQUALS( std::string("[test.cpp:8]: Memory leak: str\n"), errout.str() );
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}
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void forwhile7()
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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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" break;\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 dowhile1()
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{
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check( "void f()\n"
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"{\n"
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" char *str = strdup(\"abc\");\n"
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" do\n"
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" {\n"
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" str = strdup(\"def\");\n"
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" }\n"
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" while (!str);\n"
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" return str;\n"
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"}\n" );
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ASSERT_EQUALS( std::string("[test.cpp:5]: Memory leak: str\n"), errout.str() );
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}
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void switch1()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char *str = new char[10];\n"
|
|
" switch (abc)\n"
|
|
" {\n"
|
|
" case 1:\n"
|
|
" break;\n"
|
|
" };\n"
|
|
" delete [] str;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS( std::string(""), errout.str() );
|
|
}
|
|
|
|
|
|
void switch2()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char *str = new char[10];\n"
|
|
" switch (abc)\n"
|
|
" {\n"
|
|
" case 1:\n"
|
|
" delete [] str;\n"
|
|
" break;\n"
|
|
" default:\n"
|
|
" break;\n"
|
|
" };\n"
|
|
"}\n");
|
|
ASSERT_EQUALS( std::string("[test.cpp:12]: Memory leak: str\n"), errout.str() );
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void ret1()
|
|
{
|
|
check( "char *f( char **str )\n"
|
|
"{\n"
|
|
" char *ret = malloc( 10 );\n"
|
|
" return *str = ret;\n"
|
|
"}\n" );
|
|
|
|
ASSERT_EQUALS( std::string(""), errout.str() );
|
|
}
|
|
|
|
|
|
void ret2()
|
|
{
|
|
check( "void foo()\n"
|
|
"{\n"
|
|
" struct ABC *abc = new ABC;\n"
|
|
" abc->a = new char[10];\n"
|
|
" if ( ! abc->a )\n"
|
|
" return;\n"
|
|
" delete [] abc->a;\n"
|
|
" delete abc;\n"
|
|
"}\n" );
|
|
|
|
ASSERT_EQUALS( std::string("[test.cpp:6]: Memory leak: abc\n"), errout.str() );
|
|
}
|
|
|
|
|
|
|
|
|
|
void mismatch1()
|
|
{
|
|
check( "void f()\n"
|
|
"{\n"
|
|
" int *a = new int[10];\n"
|
|
" free(a);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS( std::string("[test.cpp:4]: Mismatching allocation and deallocation: a\n"), errout.str() );
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
////////////////////////////////////////////////
|
|
// function calls
|
|
////////////////////////////////////////////////
|
|
|
|
|
|
void func1()
|
|
{
|
|
check( "static void f()\n"
|
|
"{\n"
|
|
" char *p = new char[100];\n"
|
|
" foo(p);\n"
|
|
"}\n" );
|
|
ASSERT_EQUALS( std::string(""), errout.str() );
|
|
}
|
|
|
|
|
|
void func2()
|
|
{
|
|
check( "static void f()\n"
|
|
"{\n"
|
|
" char *p = new char[100];\n"
|
|
" foo.add(p);\n"
|
|
"}\n" );
|
|
ASSERT_EQUALS( std::string(""), errout.str() );
|
|
}
|
|
|
|
|
|
void func3()
|
|
{
|
|
check( "static void foo(const char *str)\n"
|
|
"{ }\n"
|
|
"\n"
|
|
"static void f()\n"
|
|
"{\n"
|
|
" char *p = new char[100];\n"
|
|
" foo(p);\n"
|
|
"}\n" );
|
|
ASSERT_EQUALS( std::string("[test.cpp:8]: Memory leak: p\n"), errout.str() );
|
|
}
|
|
|
|
|
|
void func4()
|
|
{
|
|
check( "static void foo(char *str)\n"
|
|
"{\n"
|
|
" delete [] str;\n"
|
|
"}\n"
|
|
"\n"
|
|
"static void f()\n"
|
|
"{\n"
|
|
" char *p = new char[100];\n"
|
|
" foo(p);\n"
|
|
"}\n" );
|
|
ASSERT_EQUALS( std::string(""), errout.str() );
|
|
}
|
|
|
|
|
|
void func5()
|
|
{
|
|
check( "static void foo(char *str)\n"
|
|
"{\n"
|
|
" delete str;\n"
|
|
"}\n"
|
|
"\n"
|
|
"static void f()\n"
|
|
"{\n"
|
|
" char *p = new char[100];\n"
|
|
" foo(p);\n"
|
|
"}\n" );
|
|
std::string err( errout.str() );
|
|
ASSERT_EQUALS( std::string("[test.cpp:9] -> [test.cpp:3]: Mismatching allocation and deallocation: str\n"), err );
|
|
}
|
|
|
|
|
|
void func6()
|
|
{
|
|
check( "static void foo(char *str)\n"
|
|
"{\n"
|
|
" goto abc;\n"
|
|
"}\n"
|
|
"\n"
|
|
"static void f()\n"
|
|
"{\n"
|
|
" char *p = new char[100];\n"
|
|
" foo(p);\n"
|
|
"}\n" );
|
|
std::string err( errout.str() );
|
|
ASSERT_EQUALS( std::string(""), err );
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
void func3()
|
|
{
|
|
check( "static char *dmalloc()\n"
|
|
"{\n"
|
|
" char *p = new char[100];\n"
|
|
" return p;\n"
|
|
"}\n"
|
|
"static void f()\n"
|
|
"{\n"
|
|
" char *p = dmalloc();\n"
|
|
"}\n" );
|
|
ASSERT_EQUALS( std::string("[test.cpp:9]: Memory leak: p\n"), errout.str() );
|
|
}
|
|
|
|
|
|
void func4()
|
|
{
|
|
check( "static char *dmalloc()\n"
|
|
"{\n"
|
|
" char *p = new char[100];\n"
|
|
" return p;\n"
|
|
"}\n"
|
|
"static void f()\n"
|
|
"{\n"
|
|
" char *p = dmalloc();\n"
|
|
" delete p;\n"
|
|
"}\n" );
|
|
ASSERT_EQUALS( std::string("[test.cpp:9]: Mismatching allocation and deallocation: p\n"), errout.str() );
|
|
}
|
|
|
|
|
|
void func5()
|
|
{
|
|
check( "static void foo(const char *str)\n"
|
|
"{ }\n"
|
|
"\n"
|
|
"static void f()\n"
|
|
"{\n"
|
|
" char *p = new char[100];\n"
|
|
" foo(p);\n"
|
|
"}\n" );
|
|
ASSERT_EQUALS( std::string("[test.cpp:8]: Memory leak: p\n"), errout.str() );
|
|
}
|
|
|
|
|
|
void func6()
|
|
{
|
|
check( "struct ab\n"
|
|
"{\n"
|
|
" int a;\n"
|
|
" int b;\n"
|
|
"};\n"
|
|
"\n"
|
|
"static void f()\n"
|
|
"{\n"
|
|
" struct ab *p = malloc(sizeof(struct ab));\n"
|
|
" foo(&p->b);\n"
|
|
"}\n" );
|
|
ASSERT_EQUALS( std::string("[test.cpp:11]: Memory leak: p\n"), errout.str() );
|
|
}
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
void class1()
|
|
{
|
|
check( "class Fred\n"
|
|
"{\n"
|
|
"private:\n"
|
|
" char *str1;\n"
|
|
" char *str2;\n"
|
|
"public:\n"
|
|
" Fred();\n"
|
|
" ~Fred();\n"
|
|
"};\n"
|
|
"\n"
|
|
"Fred::Fred()\n"
|
|
"{\n"
|
|
" str1 = new char[10];\n"
|
|
" str2 = new char[10];\n"
|
|
"}\n"
|
|
"\n"
|
|
"Fred::~Fred()\n"
|
|
"{\n"
|
|
" delete [] str2;\n"
|
|
"}\n" );
|
|
|
|
ASSERT_EQUALS( std::string("[test.cpp:1]: Memory leak: Fred::str1\n"), errout.str() );
|
|
}
|
|
|
|
|
|
void class2()
|
|
{
|
|
check( "class Fred\n"
|
|
"{\n"
|
|
"private:\n"
|
|
" char *str1;\n"
|
|
"public:\n"
|
|
" Fred();\n"
|
|
" ~Fred();\n"
|
|
"};\n"
|
|
"\n"
|
|
"Fred::Fred()\n"
|
|
"{\n"
|
|
" str1 = new char[10];\n"
|
|
"}\n"
|
|
"\n"
|
|
"Fred::~Fred()\n"
|
|
"{\n"
|
|
" free(str1);\n"
|
|
"}\n" );
|
|
|
|
ASSERT_EQUALS( std::string("[test.cpp:17]: Mismatching allocation and deallocation: Fred::str1\n"), errout.str() );
|
|
}
|
|
|
|
|
|
|
|
|
|
void throw1()
|
|
{
|
|
check( "void foo()\n"
|
|
"{\n"
|
|
" char *str = new char[10];\n"
|
|
" if ( ! abc )\n"
|
|
" throw 123;\n"
|
|
" delete [] str;\n"
|
|
"}\n" );
|
|
|
|
ASSERT_EQUALS( std::string("[test.cpp:5]: Memory leak: str\n"), errout.str() );
|
|
}
|
|
|
|
|
|
|
|
|
|
void linux_list_1()
|
|
{
|
|
check( "struct AB\n"
|
|
"{\n"
|
|
" int a;\n"
|
|
" int b;\n"
|
|
"};\n"
|
|
"void foo()\n"
|
|
"{\n"
|
|
" struct AB *ab = new AB;\n"
|
|
" func(&ab->a);\n"
|
|
"}\n" );
|
|
|
|
ASSERT_EQUALS( std::string(""), errout.str() );
|
|
}
|
|
|
|
|
|
|
|
void sizeof1()
|
|
{
|
|
check( "void f()\n"
|
|
"{\n"
|
|
" struct s_t s1;\n"
|
|
" struct s_t cont *p = &s1;\n"
|
|
" struct s_t *s2;\n"
|
|
"\n"
|
|
" memset(p, 0, sizeof(*p));\n"
|
|
"\n"
|
|
" s2 = (struct s_t *) malloc(sizeof(*s2));\n"
|
|
"\n"
|
|
" if (s2->value != 0)\n"
|
|
" return;\n"
|
|
"\n"
|
|
" free(s2);\n"
|
|
"\n"
|
|
" return;\n"
|
|
"}\n" );
|
|
|
|
std::string err( errout.str() );
|
|
|
|
ASSERT_EQUALS( std::string("[test.cpp:12]: Memory leak: s2\n"), err );
|
|
}
|
|
|
|
};
|
|
|
|
REGISTER_TEST( TestMemleak )
|
|
|
|
|