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DebugNew (cross platform c++ memory leak detect library)

gilgil

http://www.gilgil.net/?document_srl=9272

2011.09.05 00:32:52 (*.7.228.40)

236340

In writing C++ codes, there occur so many problems of memory leak. C++ programmers are always forced to check if they have made C++ codes correctly to prevent memory leak . Here is a good memory leak automatically detection solution named "DebugNew".

Visual Studio(2005), Code Gear C++Builder 2007, MinGW(4.5.2) and Linux G++(g++ (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5) tests have been completed successfully.

[simple_test]

#include "DebugNew.h"

int main()
{
  int* p = new int;
  return 0;
}

At the end of execution, you can get the following output message.

$ simple_test
memory leak 00461790(4) ../simple_test.cpp:5

You can use memory leak detection module separately by calling MemoryLeak::start() and MemoryLeak::stop() case by case.

[example]

#include "DebugNew.h"

void test()
{
  printf("\ntest1\n");
  MemoryLeak::start();
  int* p = new int;
  MemoryLeak::stop();

  printf("\ntest2\n");
  MemoryLeak::start();
  char* p2 = new char[100];
  MemoryLeak::stop();
}

int main()
{
  test();
  return 0;
}

[result]

$ test

test1
memory leak 00601790(4) ../test.cpp:8

test2
memory leak 006035A8(100) ../test.cpp:13

[Download]

DebugNew(2011.09.14).zip

Some significant bugs fixed.

DebugNew(2011.09.16).zip (deprecated)

readme.txt added.

DebugNew(2011.09.05)_4.zip (deprecated)

Some bugs fixed. In all_test project, stl test codes added.

DebugNew(2011.09.05)_3.zip

MemoryLeak member function names changed(clear > start, check > stop).

DebugNew(2011.09.05).zip (deprecated)

function names chcnaged. (my_malloc > debug_malloc, my_free > debug_free)

In MemoryLeak class, m_del_check variable added to check del checking.

DebugNew(2011.09.05).zip (derpecated)

You would..

List

2011.09.05 01:40:05 (*.4.203.182)

gilgil

[Interface]

// ----------------------------------------------------------------------------
// Overload functions
// ----------------------------------------------------------------------------
void* debug_malloc      (size_t size, const char* file, const int line);
void  debug_free        (void* p,     const char* file, const int line);

void* operator new      (size_t size, const char* file, const int line)
{
  void* p = debug_malloc(size, file, line);
  return p;
}

void  operator delete   (void* p, const char* file, const int line)
{
  return debug_free(p, file, line);
}

void operator delete(void* p)
{
  return debug_free(p, "unknown", 0);
}

void* operator new[]    (size_t size, const char* file, const int line)
{
  void* p = debug_malloc(size, file, line);
  return p;
}

void operator delete[](void* p)
{
  return debug_free(p, "unknown", 0);
}

void  operator delete[] (void* p, const char* file, const int line)
{
  return debug_free(p, file, line);
}

// ----------------------------------------------------------------------------
// Macros
// ----------------------------------------------------------------------------
#define malloc(A) debug_malloc((A), __FILE__, __LINE__)
#define free(A)   debug_free((A), __FILE__, __LINE__)
#define new       debug_new(__FILE__, __LINE__)
#define delete(A) operator delete((A), __FILE__, __LINE__)

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