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cppcheck/testmemleak.cpp

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Formatting: uniformize end of lines.
2008-12-18 22:28:57 +01:00
/*
Copyright and app name changed in each file
2008-12-19 22:15:06 +01:00
* cppcheck - c/c++ syntax checking
* Copyright (C) 2007-2008 Daniel Marjamäki, Reijo Tomperi, Nicolas Le Cam
Formatting: uniformize end of lines.
2008-12-18 22:28:57 +01:00
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/
*/
#define UNIT_TESTING
#include "tokenize.h"
#include "checkmemoryleak.h"
#include "testsuite.h"
#include <iostream>
#include <sstream>
extern std::ostringstream errout;
class TestMemleak : public TestFixture
{
public:
TestMemleak() : TestFixture("TestMemleak")
{ }
private:
void check( const char code[], bool showAll = false )
{
// Tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize( istr, "test.cpp" );
tokenizer.setVarId();
tokenizer.simplifyTokenList();
// Clear the error buffer..
errout.str("");
// Check for memory leaks..
Settings settings;
settings._debug = true;
settings._showAll = showAll;
tokenizer.fillFunctionList();
CheckMemoryLeakClass checkMemoryLeak( &tokenizer, settings, this );
checkMemoryLeak.CheckMemoryLeak();
}
void run()
{
TEST_CASE( simple1 );
TEST_CASE( simple2 );
TEST_CASE( simple3 );
TEST_CASE( simple4 );
TEST_CASE( simple5 );
TEST_CASE( simple6 );
TEST_CASE( simple7 );
memory leak : fixed 2 bugs related to the testcases TestMemleak::if7 and TestMemleak::simple9
2008-12-17 20:21:39 +01:00
TEST_CASE( simple8 );
Formatting: uniformize end of lines.
2008-12-18 22:28:57 +01:00
TEST_CASE( simple9 ); // Bug 2435468 - member function "free"
TEST_CASE( use1 );
TEST_CASE( use2 );
TEST_CASE( ifelse1 );
TEST_CASE( ifelse2 );
TEST_CASE( ifelse3 );
TEST_CASE( ifelse4 );
TEST_CASE( ifelse5 );
TEST_CASE( ifelse6 );
TEST_CASE( ifelse7 );
TEST_CASE( ifelse8 );
TEST_CASE( ifelse9 );
TEST_CASE( if1 );
TEST_CASE( if2 );
TEST_CASE( if3 );
TEST_CASE( if4 );
TEST_CASE( if5 );
memory leak : fixed 2 bugs related to the testcases TestMemleak::if7 and TestMemleak::simple9
2008-12-17 20:21:39 +01:00
TEST_CASE( if6 ); // Bug 2432631
Formatting: uniformize end of lines.
2008-12-18 22:28:57 +01:00
TEST_CASE( if7 ); // Bug 2401436
Memory leaks : Reduce "if { dealloc ; return ; } if return ;" to "if return ;". Related with bug 2458532
2008-12-22 15:42:54 +01:00
TEST_CASE( if8 ); // Bug 2458532
Formatting: uniformize end of lines.
2008-12-18 22:28:57 +01:00
TEST_CASE( alwaysTrue );
TEST_CASE( forwhile1 );
TEST_CASE( forwhile2 );
TEST_CASE( forwhile3 );
TEST_CASE( forwhile4 );
TEST_CASE( forwhile5 );
TEST_CASE( forwhile6 );
TEST_CASE( forwhile7 );
TEST_CASE( forwhile8 ); // Bug 2429936
TEST_CASE( dowhile1 );
TEST_CASE( switch1 );
TEST_CASE( switch2 );
TEST_CASE( ret1 );
TEST_CASE( ret2 );
TEST_CASE( ret3 );
TEST_CASE( ret4 );
TEST_CASE( mismatch1 );
TEST_CASE( func1 );
TEST_CASE( func2 );
TEST_CASE( func3 );
TEST_CASE( func4 );
TEST_CASE( func5 );
TEST_CASE( func6 );
// TODO TEST_CASE( func7 );
TEST_CASE( func8 ); // Using callback
TEST_CASE( func9 ); // Embedding the function call in a if-condition
TEST_CASE( class1 );
TEST_CASE( class2 );
TEST_CASE( throw1 );
TEST_CASE( linux_list_1 );
TEST_CASE( sizeof1 );
TEST_CASE( realloc1 );
TEST_CASE( realloc2 );
TEST_CASE( assign );
// TODO TEST_CASE( varid );
TEST_CASE( cast1 );
TEST_CASE( cast2 );
TEST_CASE( cast3 );
// TODO TEST_CASE( structmember1 );
}
void simple1()
{
check( "void f()\n"
"{\n"
" int *a = new int[10];\n"
"}\n" );
ASSERT_EQUALS( std::string("[test.cpp:4]: Memory leak: a\n"), errout.str() );
}
void simple2()
{
check( "Fred *NewFred()\n"
"{\n"
" Fred *f = new Fred;\n"
" return f;\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void simple3()
{
check( "static char *f()\n"
"{\n"
" char *s = new char[100];\n"
" return (char *)s;\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void simple4()
{
check( "static char *f()\n"
"{\n"
" char *s = new char[100];\n"
" return 0;\n"
"}\n" );
ASSERT_EQUALS( std::string("[test.cpp:4]: Memory leak: s\n"), errout.str() );
}
void simple5()
{
check( "static char *f()\n"
"{\n"
" struct *str = new strlist;\n"
" return &str->s;\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void simple6()
{
check( "static void f()\n"
"{\n"
" char *str = strdup(\"hello\");\n"
" char *str2 = (char *)str;\n"
" free(str2);\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void simple7()
{
// A garbage collector may delete f automaticly
check( "class Fred;\n"
"void foo()\n"
"{\n"
" Fred *f = new Fred;\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void simple8()
{
check( "char * foo ()\n"
"{\n"
" char *str = strdup(\"abc\");\n"
" if (somecondition)\n"
" for (i = 0; i < 2; i++)\n"
" { }\n"
" return str;\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void simple9()
{
check( "void foo()\n"
"{\n"
" MyClass *c = new MyClass();\n"
" c->free(c);\n"
" delete c;\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void use1()
{
check( "void foo()\n"
"{\n"
" char *str;\n"
" if (somecondition)\n"
" str = strdup(\"abc\");\n"
" if (somecondition)\n"
" DeleteString(str);\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void use2()
{
check( "void foo()\n"
"{\n"
" char *str = strdup(\"abc\");\n"
" if ( abc ) { memset(str, 0, 3); }\n"
" *somestr = str;\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void ifelse1()
{
check( "void f()\n"
"{\n"
" int *a = new int[10];\n"
" if (a)\n"
" {\n"
" delete [] a;\n"
" }\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void ifelse2()
{
check( "void f()\n"
"{\n"
" char *str = strdup(\"hello\");\n"
" if (somecondition)\n"
" {\n"
" return;\n"
" }\n"
" free(str);\n"
"}\n" );
ASSERT_EQUALS( std::string("[test.cpp:6]: Memory leak: str\n"), errout.str() );
}
void ifelse3()
{
check( "void f()\n"
"{\n"
" char *str = strdup(\"hello\");\n"
" if (a==b)\n"
" {\n"
" free(str);\n"
" return;\n"
" }\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
check( "void f()\n"
"{\n"
" char *str = strdup(\"hello\");\n"
" if (a==b)\n"
" {\n"
" free(str);\n"
" return;\n"
" }\n"
"}\n", true );
ASSERT_EQUALS( std::string("[test.cpp:9]: Memory leak: str\n"), errout.str() );
}
void ifelse4()
{
check( "void f()\n"
"{\n"
" char *str = new char[10];\n"
" if (a==b)\n"
" {\n"
" delete [] str;\n"
" return;\n"
" }\n"
" delete [] str;\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void ifelse5()
{
check( "void f()\n"
"{\n"
" char *str;\n"
" if (somecondition)\n"
" {\n"
" str = new char[100];\n"
" }\n"
" else\n"
" {\n"
" return;\n"
" }\n"
" delete [] str;\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void ifelse6()
{
check( "static char *f()\n"
"{\n"
" char *s = new char[100];\n"
" if ( a == b )\n"
" {\n"
" return s;\n"
" }\n"
" return NULL;\n"
"}\n" );
ASSERT_EQUALS( std::string("[test.cpp:8]: Memory leak: s\n"), errout.str() );
}
void ifelse7()
{
check( "static char *f()\n"
"{\n"
" char *s;\n"
" if ( abc )\n"
" {\n"
" s = new char[10];\n"
" }\n"
" return s;\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void ifelse8()
{
check( "static char *f()\n"
"{\n"
" char *s = new char[10];\n"
" if ( s )\n"
" {\n"
" return s;\n"
" }\n"
" return 0;\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void ifelse9()
{
check( "static char *f()\n"
"{\n"
" char *s = new char[10];\n"
" if ( ghfgf )\n"
" {\n"
" delete [] s;\n"
" }\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void if1()
{
check( "void f()\n"
"{\n"
" struct abc *p = new abc;\n"
" p->a = new char[100];\n"
" if ( ! p->a )\n"
" return;\n"
" foo(p);\n"
"}\n" );
ASSERT_EQUALS( std::string("[test.cpp:6]: Memory leak: p\n"), errout.str() );
}
void if2()
{
check( "void f()\n"
"{\n"
" struct smp_alt_module *smp;\n"
" smp = kzalloc(sizeof(*smp), GFP_KERNEL);\n"
" if (NULL == smp)\n"
" return;\n"
" kfree( smp );\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void if3()
{
check( "void f()\n"
"{\n"
" char *s = new char[100];\n"
" if (0 != s)\n"
" foo(s);\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void if4()
{
check( "void f()\n"
"{\n"
" char *s;\n"
" bool b = true;\n"
" if (b && (s = malloc(256)))\n"
" ;\n"
" if (b)\n"
" free(s);\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void if5()
{
check( "void f()\n"
"{\n"
" char *p = malloc(256);\n"
" if (somecondition && !p)\n"
" return;\n"
" free(p);\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void if6()
{
check( "void f()\n"
"{\n"
" FILE *a = 0;\n"
" a = fopen(\"test.txt\", \"rw\");\n"
" if( a == 0 )\n"
" {\n"
" a = fopen(\"test.txt\", \"r\");\n"
" }\n"
"\n"
" fclose( a );\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
void if7()
{
check( "void f( bool b )\n"
"{\n"
" int *a=0;\n"
" if( b )\n"
" {\n"
" a = new int[10];\n"
" }\n"
"\n"
" if( b )\n"
" delete [] a;\n"
" else {}\n"
"}\n" );
ASSERT_EQUALS( std::string(""), errout.str() );
}
Memory leaks : Reduce "if { dealloc ; return ; } if return ;" to "if return ;". Related with bug 2458532
2008-12-22 15:42:54 +01:00
void if8()
{
check( "static void f(int i)\n"
"{\n"
" char *c = malloc(50);\n"
" if (i == 1)\n"
" {\n"
" free(c);\n"
" return;\n"
" }\n"
" if (i == 2)\n"
" {\n"
" return;\n"
" }\n"
" free(c);\n"
"}\n" );
ASSERT_EQUALS( std::string("[test.cpp:11]: Memory leak: c\n"), errout.str() );
}
Formatting: uniformize end of lines.
2008-12-18 22:28:57 +01:00
void alwaysTrue()
{
check( "void f()\n"
"{\n"
" char *p = 0;\n"
" for (;;)\n"
" {\n"
" p = malloc(256);\n"
" if (1)\n"
" break;\n"
" }\n"
" free(p);\n"
"}\n" );
std::string err( errout.str() );
ASSERT_EQUALS( std::string(""), err );
}
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 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 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 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 );
}
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"
" 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() );
}
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() );
}
};
REGISTER_TEST( TestMemleak )