|
|
// -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
// vim:tabstop=4:shiftwidth=4:expandtab:
/*
* Copyright (C) 2004-2008 Wu Yongwei <adah at users dot sourceforge dot net>
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any
* damages arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute
* it freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must
* not claim that you wrote the original software. If you use this
* software in a product, an acknowledgement in the product
* documentation would be appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must
* not be misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source
* distribution.
*
* This file is part of Stones of Nvwa:
* http://sourceforge.net/projects/nvwa
*
* original version changed for ManaPlus
*
* Copyright (C) 2011-2014 The ManaPlus Developers
*/
/**
* @file debug_new.h
*
* Header file for checking leaks caused by unmatched new/delete.
*
* @version 4.4, 2007/12/31
* @author Wu Yongwei
*
*/
#ifndef M_DEBUG_NEW_H
#define M_DEBUG_NEW_H
#include <new>
#include <cstdio>
/**
* @def HAVE_PLACEMENT_DELETE
*
* Macro to indicate whether placement delete operators are supported on
* a certain compiler. Some compilers, like Borland C++ Compiler 5.5.1
* and Digital Mars Compiler 8.42, do not support them, and the user
* must define this macro to \c 0 to make the program compile. Also
* note that in that case memory leakage will occur if an exception is
* thrown in the initialization (constructor) of a dynamically created
* object.
*/
#ifndef HAVE_PLACEMENT_DELETE
#define HAVE_PLACEMENT_DELETE 1
#endif
/**
* @def M_DEBUG_NEW_REDEFINE_NEW
*
* Macro to indicate whether redefinition of \c new is wanted. If one
* wants to define one's own <code>operator new</code>, to call
* <code>operator new</code> directly, or to call placement \c new, it
* should be defined to \c 0 to alter the default behaviour. Unless, of
* course, one is willing to take the trouble to write something like:
* @code
* # ifdef new
* # define _NEW_REDEFINED
* # undef new
* # endif
*
* // Code that uses new is here
*
* # ifdef _NEW_REDEFINED
* # ifdef DEBUG_NEW
* # define new DEBUG_NEW
* # endif
* # undef _NEW_REDEFINED
* # endif
* @endcode
*/
#ifndef M_DEBUG_NEW_REDEFINE_NEW
#define M_DEBUG_NEW_REDEFINE_NEW 1
#endif
/* Prototypes */
int check_leaks();
int check_mem_corruption();
void* operator new(size_t size, const char* file, int line);
void* operator new[](size_t size, const char* file, int line);
#if HAVE_PLACEMENT_DELETE
void operator delete(void* pointer, const char* file, int line) throw();
void operator delete[](void* pointer, const char* file, int line) throw();
#endif
#if defined(_MSC_VER) && _MSC_VER < 1300
// MSVC 6 requires the following declarations; or the non-placement
// new[]/delete[] will not compile.
void* operator new[](size_t) throw(std::bad_alloc);
void operator delete[](void*) throw();
#endif
/* Control variables */
extern bool new_autocheck_flag; // default to true: call check_leaks() on exit
extern bool new_verbose_flag; // default to false: no verbose information
extern FILE* new_output_fp; // default to stderr: output to console
extern const char* new_progname; // default to NULL; should be
// assigned argv[0]
/**
* @def DEBUG_NEW
*
* Macro to catch file/line information on allocation. If
* #M_DEBUG_NEW_REDEFINE_NEW is \c 0, one can use this macro directly;
* otherwise \c new will be defined to it, and one must use \c new
* instead.
*/
#define DEBUG_NEW __debug_new_recorder(__FILE__, __LINE__) ->* new
# if M_DEBUG_NEW_REDEFINE_NEW
# define new DEBUG_NEW
# endif
# ifdef M_DEBUG_NEW_EMULATE_MALLOC
# include <stdlib.h>
# ifdef new
# define malloc(s) ((void*)(new char[s]))
# else
# define malloc(s) ((void*)(DEBUG_NEW char[s]))
# endif
# define free(p) delete[] (char*)(p)
# define default_free free
# endif
/**
* Recorder class to remember the call context.
*
* The idea comes from <a href="http://groups.google.com/group/comp.lang.c++.moderated/browse_thread/thread/7089382e3bc1c489/85f9107a1dc79ee9?#85f9107a1dc79ee9">Greg Herlihy's post</a> in comp.lang.c++.moderated.
*/
class __debug_new_recorder
{
const char* _M_file;
const int _M_line;
void _M_process(void* pointer);
public:
/**
* Constructor to remember the call context. The information will
* be used in __debug_new_recorder::operator->*.
*/
__debug_new_recorder(const char* file, int line)
: _M_file(file), _M_line(line) {}
/**
* Operator to write the context information to memory.
* <code>operator->*</code> is chosen because it has the right
* precedence, it is rarely used, and it looks good: so people can
* tell the special usage more quickly.
*/
template <class _Tp> _Tp* operator->*(_Tp* pointer)
{ _M_process(pointer); return pointer; }
private:
__debug_new_recorder(const __debug_new_recorder&);
__debug_new_recorder& operator=(const __debug_new_recorder&);
};
/**
* Counter class for on-exit leakage check.
*
* This technique is learnt from <em>The C++ Programming Language</em> by
* Bjarne Stroustup.
*/
class __debug_new_counter
{
static int _S_count;
public:
__debug_new_counter();
~__debug_new_counter();
};
/** Counting object for each file including debug_new.h. */
static __debug_new_counter __debug_new_count;
#endif // M_DEBUG_NEW_H
|
