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cwindowsmsys2

Stackoverfflow with Msys2

I'm under Windows (10, I guess), using Msys2 for development. I'm coding a program where I need a large array, but I can't use dynamic memory. The problem is, this array is too large to fit on the callstack, which produces a stackoverflow.

I tried to change the callstack size with ulimit -s 100000. But my program still crash. When I check with the same command ulimit -s I've got the limit I set. But when I check with a small program with getrlimit, I've got the default value.

I saw in this thread that we can change some of the Msys2 config values with the file msys.bat, but i can't find this file.


My Question
How can I change the callstack on windows/Msys2?

Solution

  • Pass the large array by pointer

    #include <stdio.h>

char large_array[100000000];

void myfunc (char *array, size_t size)
{
    for (int i=0; i<size; i++)
        //STUFF
}

int main()
{
    myfunc(large_array, sizeof(large_array)/sizeof(large_array[0]));

    return 0;
}