问题
When I want to #define for SIZE 1.000.000 , my program crashed before it start main function, but when i #define for SIZE 100.000 it work. I have two arrays initialization in my program.
#define SIZE 1000000
char *baza_vocka[SIZE];
char b_vocka[SIZE];
EDIT: They are local variables.
回答1:
In case of 1M you're trying to allocate an array on the stack, which is bigger than the stack size. For such sizes you need to allocate the memory on heap.
For example:
int main()
{
// allocation on the heap
char **baza_vocka = malloc(sizeof(char*)*SIZE);
char *b_vocka = malloc(sizeof(char)*SIZE);
// working code
baza_vocka[1] = 0x0;
b_vocka[1] = 'a';
// cleaning the heap
free(b_vocka);
free(baza_vocka);
}
回答2:
I guess that baza_vocka is a local variable, perhaps inside main
You are experimenting some stack overflow, .... Local call frames should usually be small (a few kilobytes) in your call stack
You should not have so big local variables. Allocate such big arrays in the heap using malloc or calloc. Don't forget to test that they are not failing. Read documentation of malloc(3), and don't forget to free such a heap allocated array. Beware of memory leaks & buffer overflows. Use valgrind if available.
On current desktops, stack space is a few megabytes, so you usually should limit each call frame to a few kilobytes (or a few dozens of kilobytes).
来源：https://stackoverflow.com/questions/26721826/when-i-want-for-define-to-set-1000000-program-in-process-crashed