Allocation of memory greater than 1 GB in an EXEC_MAGIC binary

[Mayank]

2
Hi all,

I have the following piece of code:

ptr = NULL;
ptr = malloc(1024*1024*1024);
if (ptr)
perror("Malloc successful");
else
perror("Malloc unsuccessful");

My maxdsiz is set to 0x7B03A000 which is near about 2GB.
maxdsiz64bit = 0x0000000040000000
maxssiz = 0x00800000
maxssiz_64bit = 0x00800000

I am compiling the given code using the following command line string
cc +DD32 -Q -N

Still the code fails in allocating more than
900 MB of memory on my machine.
Any hint on what I may be missing?

[Klaus Crusius]

Do you have another free 1GB of virtual memory?
(swapinfo -m will report free vmem).

Klaus

[Stefan Farrelly]

do the following command on your binary;

chatr +q3p enable

This enables a memory quadrant area, tested it, works fine now (didnt work without the above command). See man on chatr for more info on it.