1490 lines
37 KiB
C++
1490 lines
37 KiB
C++
/*
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* cppcheck - c/c++ syntax checking
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* Copyright (C) 2007-2009 Daniel Marjamäki, Reijo Tomperi, Nicolas Le Cam
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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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#define UNIT_TESTING
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#include "../src/tokenize.h"
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#include "../src/checkmemoryleak.h"
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#include "testsuite.h"
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#include <iostream>
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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[], bool showAll = false)
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{
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// Tokenize..
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Tokenizer tokenizer;
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std::istringstream istr(code);
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tokenizer.tokenize(istr, "test.cpp");
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tokenizer.setVarId();
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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._debug = true;
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settings._showAll = showAll;
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tokenizer.fillFunctionList();
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CheckMemoryLeakClass checkMemoryLeak(&tokenizer, settings, this);
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checkMemoryLeak.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(simple9); // Bug 2435468 - member function "free"
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TEST_CASE(simple10); // fclose in a if condition
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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(if6); // Bug 2432631
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TEST_CASE(if7); // Bug 2401436
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TEST_CASE(if8); // Bug 2458532
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// TODO TEST_CASE( if9 ); // if (realloc)
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TEST_CASE(if10); // else if (realloc)
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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(forwhile8); // Bug 2429936
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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(ret3);
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TEST_CASE(ret4);
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TEST_CASE(ret5); // Bug 2458436 - return use
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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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// TODO TEST_CASE( func7 );
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TEST_CASE(func8); // Using callback
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TEST_CASE(func9); // Embedding the function call in a if-condition
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TEST_CASE(func10); // Bug 2458510 - Function pointer
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TEST_CASE(func11); // Bug 2458510 - Function pointer
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TEST_CASE(func12);
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TEST_CASE(class1);
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TEST_CASE(class2);
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// TODO TEST_CASE( class3 );
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TEST_CASE(throw1);
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TEST_CASE(throw2);
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TEST_CASE(linux_list_1);
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TEST_CASE(sizeof1);
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TEST_CASE(realloc1);
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TEST_CASE(realloc2);
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TEST_CASE(assign);
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// TODO TEST_CASE( varid );
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TEST_CASE(cast1);
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TEST_CASE(cast2);
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TEST_CASE(cast3);
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// TODO TEST_CASE( structmember1 );
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TEST_CASE(dealloc_use_1); // Deallocate and then use memory
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TEST_CASE(dealloc_use_2); // Deallocate and then use memory. No error if "use" is &var
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TEST_CASE(dealloc_use_3); // Deallocate and then use memory. No error
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TEST_CASE(dealloc_use_4);
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TEST_CASE(dealloc_use_5);
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TEST_CASE(dealloc_use_6);
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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 simple9()
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{
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check("void foo()\n"
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"{\n"
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" MyClass *c = new MyClass();\n"
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" c->free(c);\n"
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" delete c;\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 simple10()
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{
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check("void foo()\n"
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"{\n"
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" FILE * f = fopen(fname, str);\n"
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" if ( fclose(f) != NULL );\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(""), errout.str());
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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", true);
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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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ASSERT_EQUALS(std::string(""), errout.str());
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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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ASSERT_EQUALS(std::string(""), errout.str());
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}
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void if6()
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{
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check("void f()\n"
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"{\n"
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" FILE *a = 0;\n"
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" a = fopen(\"test.txt\", \"rw\");\n"
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" if( a == 0 )\n"
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" {\n"
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" a = fopen(\"test.txt\", \"r\");\n"
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" }\n"
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"\n"
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" fclose( a );\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 if7()
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{
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check("void f( bool b )\n"
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"{\n"
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" int *a=0;\n"
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" if( b )\n"
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" {\n"
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" a = new int[10];\n"
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" }\n"
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"\n"
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" if( b )\n"
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" delete [] a;\n"
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" else {}\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 if8()
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{
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check("static void f(int i)\n"
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"{\n"
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" char *c = malloc(50);\n"
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" if (i == 1)\n"
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" {\n"
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" free(c);\n"
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" return;\n"
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" }\n"
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" if (i == 2)\n"
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" {\n"
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" return;\n"
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" }\n"
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" free(c);\n"
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"}\n");
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ASSERT_EQUALS(std::string("[test.cpp:11]: Memory leak: c\n"), errout.str());
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}
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void if9()
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{
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check("static void f()\n"
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"{\n"
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" char *buf = NULL, *tmp;\n"
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" if (!(tmp = realloc(buf, 50)))\n"
|
|
" {\n"
|
|
" free(buf);\n"
|
|
" return NULL;\n"
|
|
" }\n"
|
|
" buf = tmp;\n"
|
|
" return buf;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
void if10()
|
|
{
|
|
check("static void f()\n"
|
|
"{\n"
|
|
" char *buf = malloc(10);\n"
|
|
" if (aa)\n"
|
|
" ;\n"
|
|
" else if (buf = realloc(buf, 100))\n"
|
|
" ;\n"
|
|
" free(buf);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void forwhile1()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char *str = strdup(\"hello\");\n"
|
|
" while (condition)\n"
|
|
" {\n"
|
|
" if (condition)\n"
|
|
" {\n"
|
|
" break;\n"
|
|
" }\n"
|
|
" }\n"
|
|
" free(str);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
|
|
void forwhile2()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" for (int i = 0; i < j; i++)\n"
|
|
" {\n"
|
|
" char *str = strdup(\"hello\");\n"
|
|
" if (condition)\n"
|
|
" continue;\n"
|
|
" free(str);\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:7]: Memory leak: str\n"), errout.str());
|
|
}
|
|
|
|
|
|
void forwhile3()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char *str = 0;\n"
|
|
" for (int i = 0; i < 10; i++)\n"
|
|
" {\n"
|
|
" str = strdup(\"hello\");\n"
|
|
" }\n"
|
|
" free(str);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:4]: Memory leak: str\n"), errout.str());
|
|
}
|
|
|
|
|
|
void forwhile4()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char *str = 0;\n"
|
|
" for (int i = 0; i < 10; i++)\n"
|
|
" {\n"
|
|
" str = strdup(\"hello\");\n"
|
|
" if (str) { }\n"
|
|
" }\n"
|
|
" free(str);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:4]: Memory leak: str\n"), errout.str());
|
|
}
|
|
|
|
|
|
void forwhile5()
|
|
{
|
|
check("void f(const char **a)\n"
|
|
"{\n"
|
|
" char *str = 0;\n"
|
|
" for (int i = 0; i < 10 && !str; ++i)\n"
|
|
" {\n"
|
|
" str = strdup(a[i]);\n"
|
|
" }\n"
|
|
" return str;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
|
|
void forwhile6()
|
|
{
|
|
check("void f(const char **a)\n"
|
|
"{\n"
|
|
" char *str = 0;\n"
|
|
" for (int i = 0; i < 10 && !str; ++i)\n"
|
|
" {\n"
|
|
" str = strdup(a[i]);\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:8]: Memory leak: str\n"), errout.str());
|
|
}
|
|
|
|
|
|
void forwhile7()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" for (int i = 0; i < j; i++)\n"
|
|
" {\n"
|
|
" char *str = strdup(\"hello\");\n"
|
|
" if (condition)\n"
|
|
" break;\n"
|
|
" free(str);\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:7]: Memory leak: str\n"), errout.str());
|
|
}
|
|
|
|
|
|
void forwhile8()
|
|
{
|
|
check("char *f()\n"
|
|
"{\n"
|
|
" char *a = 0;\n"
|
|
" int i = 0;\n"
|
|
" for( ;; )\n"
|
|
" {\n"
|
|
" ++i;\n"
|
|
" a = realloc( a, i );\n"
|
|
" if( !a )\n"
|
|
" return 0;\n"
|
|
"\n"
|
|
" if( i > 10 )\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"\n"
|
|
" return a;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void dowhile1()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char *str = strdup(\"abc\");\n"
|
|
" do\n"
|
|
" {\n"
|
|
" str = strdup(\"def\");\n"
|
|
" }\n"
|
|
" while (!str);\n"
|
|
" return str;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:5]: Memory leak: str\n"), errout.str());
|
|
}
|
|
|
|
|
|
|
|
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 ret3()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" FILE *filep = fopen(\"myfile.txt\",\"w\");\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS(std::string("[test.cpp:4]: Resource leak: filep\n"), errout.str());
|
|
}
|
|
|
|
void ret4()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" FILE *p = popen( \"ls -l\", \"r\");\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS(std::string("[test.cpp:4]: Resource leak: p\n"), errout.str());
|
|
}
|
|
|
|
void ret5()
|
|
{
|
|
check("static char * f()\n"
|
|
"{\n"
|
|
" char *c = new char[50];\n"
|
|
" return (c ? c : NULL);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), 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("[test.cpp:10]: Memory leak: p\n"), err);
|
|
}
|
|
|
|
|
|
void func7()
|
|
{
|
|
check("static void foo(char *str)\n"
|
|
"{\n"
|
|
" if (abc)\n"
|
|
" return;"
|
|
" 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:11]: Memory leak: p\n"), err);
|
|
}
|
|
|
|
|
|
void func8()
|
|
{
|
|
check("static void foo()\n"
|
|
"{\n"
|
|
" char *str = new char[100];"
|
|
" (*release)(str);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
|
|
void func9()
|
|
{
|
|
check("int b()\n"
|
|
"{\n"
|
|
" return 0;\n"
|
|
"}\n"
|
|
"\n"
|
|
"void a()\n"
|
|
"{\n"
|
|
" char *a = new char[10];\n"
|
|
" if (b())\n"
|
|
" return;\n"
|
|
" delete [] a;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
void func10()
|
|
{
|
|
check("static void f(void (*fnc)(char*))\n"
|
|
"{\n"
|
|
" char *c = malloc(50);\n"
|
|
" (fnc)(c);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
void func11()
|
|
{
|
|
check("static void f(struct1 *s1)\n"
|
|
"{\n"
|
|
" char *c = malloc(50);\n"
|
|
" (s1->fnc)(c);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
void func12()
|
|
{
|
|
check("void add_list(struct mmtimer *n)\n"
|
|
"{\n"
|
|
" rb_link_node(&n->list, parent, link);\n"
|
|
"}\n"
|
|
"\n"
|
|
"int foo()\n"
|
|
"{\n"
|
|
" struct mmtimer *base;\n"
|
|
"\n"
|
|
" base = kmalloc(sizeof(struct mmtimer), GFP_KERNEL);\n"
|
|
" if (base == NULL)\n"
|
|
" return -ENOMEM;\n"
|
|
"\n"
|
|
" add_list(base);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
|
|
/*
|
|
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 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", true);
|
|
|
|
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", true);
|
|
|
|
ASSERT_EQUALS(std::string("[test.cpp:17]: Mismatching allocation and deallocation: Fred::str1\n"), errout.str());
|
|
}
|
|
|
|
void class3()
|
|
{
|
|
check("class Token;\n"
|
|
"\n"
|
|
"class Tokenizer\n"
|
|
"{\n"
|
|
"private:\n"
|
|
" Token *_tokens;\n"
|
|
"\n"
|
|
"public:\n"
|
|
" Tokenizer();\n"
|
|
" ~Tokenizer();\n"
|
|
" void deleteTokens(Token *tok);\n"
|
|
"};\n"
|
|
"\n"
|
|
"Tokenizer::Tokenizer()\n"
|
|
"{\n"
|
|
" _tokens = new Token;\n"
|
|
"}\n"
|
|
"\n"
|
|
"Tokenizer::~Tokenizer()\n"
|
|
"{\n"
|
|
" deleteTokens(_tokens);\n"
|
|
"}\n"
|
|
"\n"
|
|
"void Tokenizer::deleteTokens(Token *tok)\n"
|
|
"{\n"
|
|
" while (tok)\n"
|
|
" {\n"
|
|
" Token *next = tok->next();\n"
|
|
" delete tok;\n"
|
|
" tok = next;\n"
|
|
" }\n"
|
|
"}\n", true);
|
|
|
|
ASSERT_EQUALS(std::string(""), 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 throw2()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *str = 0;\n"
|
|
" try\n"
|
|
" {\n"
|
|
" str = new char[100];\n"
|
|
" if ( somecondition )\n"
|
|
" throw exception;\n"
|
|
" delete [] str;\n"
|
|
" }\n"
|
|
" catch ( ... )\n"
|
|
" {\n"
|
|
" delete [] str;\n"
|
|
" }\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS(std::string(""), 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);
|
|
}
|
|
|
|
|
|
void realloc1()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *a = (char *)malloc(10);\n"
|
|
" a = realloc(a, 100);\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS(std::string("[test.cpp:5]: Memory leak: a\n"), errout.str());
|
|
}
|
|
|
|
void realloc2()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *a = (char *)malloc(10);\n"
|
|
" a = (char *)realloc(a, 100);\n"
|
|
" free(a);\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
|
|
void assign()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *a = (char *)malloc(10);\n"
|
|
" a = 0;\n"
|
|
" free(a);\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS(std::string("[test.cpp:3]: Memory leak: a\n"), errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *a = (char *)malloc(10);\n"
|
|
" char *p = a;\n"
|
|
" free(p);\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *a = (char *)malloc(10);\n"
|
|
" char *p = a + 1;\n"
|
|
" free(p);\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *a = (char *)malloc(10);\n"
|
|
" a += 10;\n"
|
|
" free(a - 10);\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *a = (char *)malloc(10);\n"
|
|
" a = (void *)a + 10;\n"
|
|
" free(a - 10);\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *a = new char[100];\n"
|
|
" list += a;\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
|
|
void varid()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *p = malloc(100);\n"
|
|
" {\n"
|
|
" char *p = 0;\n"
|
|
" delete p;\n"
|
|
" }\n"
|
|
" free(p);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
void cast1()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *a = reinterpret_cast<char *>(malloc(10));\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS(std::string("[test.cpp:4]: Memory leak: a\n"), errout.str());
|
|
}
|
|
|
|
void cast2()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *a = malloc(10);\n"
|
|
" free((void *)a);\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
void cast3()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *a = malloc(10);\n"
|
|
" free(reinterpret_cast<void *>(a));\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void structmember1()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" struct ABC *abc = new ABC;\n"
|
|
" abc->a = new char[100];\n"
|
|
" delete abc;\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS(std::string("[test.cpp:5]: Memory leak: abc.a\n"), errout.str());
|
|
}
|
|
|
|
|
|
|
|
|
|
void dealloc_use_1()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char *s = new char[100];\n"
|
|
" delete [] s;\n"
|
|
" p = s;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:5]: Using \"s\" after it has been deallocated / released\n"), errout.str());
|
|
}
|
|
|
|
void dealloc_use_2()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char *str;\n"
|
|
" free(str);\n"
|
|
" foo(&str);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
void dealloc_use_3()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *str = 0;\n"
|
|
" free(str);\n"
|
|
" f1(&str);\n"
|
|
" f2(str);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
void dealloc_use_4()
|
|
{
|
|
check("static void ReadDir(DIR *d)\n"
|
|
"{\n"
|
|
" DIR *subdir = OpenDir();\n"
|
|
" ReadDir( subdir );\n"
|
|
" closedir(subdir);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
void dealloc_use_5()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *str = 0;\n"
|
|
" free(str);\n"
|
|
" char c = str[10];\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:5]: Using \"str\" after it has been deallocated / released\n"), errout.str());
|
|
}
|
|
|
|
void dealloc_use_6()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *str = 0;\n"
|
|
" free(str);\n"
|
|
" printf(\"free %x\", str);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
};
|
|
|
|
REGISTER_TEST(TestMemleak)
|
|
|
|
|