Strange Memory Problem!!!!!!!!!

[rajanikant]

Here gOES....

I have a ** pointer "cohesion_table". I have allocated memory and written data into it. Now I want to copy it into a new **pointer array called "tree_table".

The code below is simple 2 loop structure to copy one table into another. NOW THE STRANGE THING HAPPENS.

It works fine until i=12 and j=236. Here after
tree_table[12][236]=cohesion[12][236]
the pointer for cohesion[12] becomes 0x0.....????
It has a valid address until then.

Any Idea Why???

**************************************

The 2 loop structure if U need them

****************************************

for(i=0;i<assigned_port_ct;i++)
{
tree_table=( int *)
my_malloc(assigned_port_ct*sizeof(int));

for(j=0;j<assigned_port_ct;j++)
{
tree_table[j]=cohesion_table[j];

}
}

 

[zBuilder]

I have no idea how your my_malloc functions, but it could be due to segment wrap around. What value does the cohesion pointer start out at?


Kim_Christensen@telus.net

http://www3.bc.sympatico.ca/Kim_Christensen/index.html

 

[Lim]

Have you allocate tree_table itself (and how)?
And what is the value of assigned_port_ct?

 

[SwapSawe]

Pls mail the full code u know memory problem lies where it is least expected.
Regards,
SwapSawe.

 

[rbobbitt]

As mentioned above, your code sample is incomplete. But your problem probably stems from the fact that you're overwriting past your array bounds. i should not get as high as 12 and j should not get as high as 236 given the definition of tree_table.

Since array indices begin at 0, the highest subscripts for tree_table are 11 and 235.

Russ
bobbitts@hotmail.com

http://home.earthlink.net/~bobbitts

 

[rajanikant]

Thanks for all the help.

I screwed Up by writing into a pointer after freeing it.
That casused the problem here.

Rajani