jos/user/testbss.c

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2018-09-25 09:22:51 -07:00
// test reads and writes to a large bss
#include <inc/lib.h>
#define ARRAYSIZE (1024*1024)
uint32_t bigarray[ARRAYSIZE];
void
umain(int argc, char **argv)
{
int i;
cprintf("Making sure bss works right...\n");
for (i = 0; i < ARRAYSIZE; i++)
if (bigarray[i] != 0)
panic("bigarray[%d] isn't cleared!\n", i);
for (i = 0; i < ARRAYSIZE; i++)
bigarray[i] = i;
for (i = 0; i < ARRAYSIZE; i++)
if (bigarray[i] != i)
panic("bigarray[%d] didn't hold its value!\n", i);
cprintf("Yes, good. Now doing a wild write off the end...\n");
bigarray[ARRAYSIZE+1024] = 0;
panic("SHOULD HAVE TRAPPED!!!");
}