Mismatch free() / delete / delete [C++] Post: 302984981

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Operating Systems Linux Mismatch free() / delete / delete [C++] Post 302984981 by SA_Palani on Thursday 3rd of November 2016 10:53:37 AM

11-03-2016

Registered User

Mismatch free() / delete / delete [C++]

Dear All,

I got the valgrind report as below [c++]

Code:

Mismatch free() / delete / delete []
at 0x4006895: operator delete(void*) (vg_replace_malloc.c:480)
by 0x8EA6D11: corefunction.

I supect that it is expect me to write free() instead of delete p1.
Given the the code.

I have the structure.

Code:

struct Pack
{
    unsigned int A;
    unsigned int B;
    unsigned int c;
    unsigned int D;    
}
 
 
int corefunction()
{
 
 
    Pack *p1=new Pack;
    I filled the value for the p1 object.
    I called a virtual funcion by passing the p1 like this
    Send((void*)p1); //
 
 
    if(p1)
        delete p1;    // Here is the place where i have the doubt that wheher is it expecting to deallocate with free().
 
 
    return 0;
}    
 
bool Send(void* &get_SendData) 
{  
    sendNextLevel(get_SendData  )
}
     
char* sendNextLevel(void* data)
{
                dataLen = sizeof(PackedSysTime);
 
 
                    Pack* txData = NULL;
                    txData = (Pack*)data;
}

since we have converted void pointer to struct without new operator like c-style casting, does it expecting us to write free while we deallocate the memory

Thank you.

Last edited by Corona688; 11-03-2016 at 12:05 PM..

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LEARN ABOUT DEBIAN

ost_mempagerobject

ost::MemPagerObject(3)					     Library Functions Manual					    ost::MemPagerObject(3)

NAME

       ost::MemPagerObject -

       This class is used to create derived classes which are constructed within a memory pager pool.

SYNOPSIS

       #include <misc.h>

   Public Member Functions
       void * operator new (size_t size, MemPager &pager)
	   Allocate memory from a memory pager.
       void * operator new[] (size_t size, MemPager &pager)
	   Allocate array from a memory pager.
       void operator delete (void *)
	   Mempager delete does nothing; the pool purges.
       void operator delete[] (void *)
	   Array mempager delete does nothing; the pool purges.

Detailed Description
       This class is used to create derived classes which are constructed within a memory pager pool.

       create objects in a memory pager.

       Author:
	   David Sugar dyfet@ostel.com

Member Function Documentation
   void ost::MemPagerObject::operator delete (void *) [inline]
       Mempager delete does nothing; the pool purges.

   void ost::MemPagerObject::operator delete[] (void *) [inline]
       Array mempager delete does nothing; the pool purges.

   void* ost::MemPagerObject::operator new (size_tsize, MemPager &pager) [inline]
       Allocate memory from a memory pager. Parameters:
	   size of new passed from operator.
	   pager to allocate from.

   void* ost::MemPagerObject::operator new[] (size_tsize, MemPager &pager) [inline]
       Allocate array from a memory pager. Parameters:
	   size of new passed from operator.
	   pager to allocate from.

Author
       Generated automatically by Doxygen for GNU CommonC++ from the source code.

GNU CommonC++							  Sat Jun 23 2012					    ost::MemPagerObject(3)

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