How to increase the maximum memory allocated on the stack/heap

Question

• How can one increase the maximum memory allocated on the stack/heap for a program in C++?

• Will increasing the RAM of your computer automatically increase the stack/heap memory of a computer program?

Answer 1

In Visual C++ you may use directive #pragma. For example:

#pragma comment(linker, "/STACK:2000000") #pragma comment(linker, "/HEAP:2000000") 

Answer 2

Second edit: I see from your comment that you work in Windows, so my Unix answer below would not be very helpful to you. But see Determining Stack Space with Visual Studio and C/C++ maximum stack size of program.

The stack size is quite often limited in Linux. The command ulimit -s will give the current value, in Kbytes. You can change the default in (usually) the file /etc/security/limits.conf.

You can also, depending on privileges, change it on a per-process basis using setrlimit(). See for example my answer to Segmentation fault: Stack allocation in a C program in Ubuntu when bufffer>4M.

For heap, see e.g Heap size limitation in C. But I don't believe you can increase or decrease the maximum size.