#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define ALIGNMENT        64               // 16 works, 32 fails, 64 fails, 128 works, 256 fails
#define LARGE_ALLOC_SIZE 16 * 1024 * 1024 // 1, 2, 4, 8, 16 fail, 32, 64, 128 work (all in MB)
#define SMALL_ALLOC_SIZE 25               // <= 24 works, > 24 breaks

void* work() {
    // Temporary buffers for the computation
    void* tmp1 = aligned_alloc(ALIGNMENT, LARGE_ALLOC_SIZE);
    void* tmp2 = aligned_alloc(ALIGNMENT, LARGE_ALLOC_SIZE);

    // Ensure memory is actually mapped
    memset(tmp1, 0, LARGE_ALLOC_SIZE);
    memset(tmp2, 0, LARGE_ALLOC_SIZE);

    // Buffer for the result
    void* result = malloc(SMALL_ALLOC_SIZE);

    free(tmp2);
    free(tmp1);

    return result;
}

int main() {
    for (;;) {
        usleep(1000);          // To make it easier to observe
        void* result = work(); // Normally the result is stored
    }
}