int main(int argc, char **argv)
{
macosx_init_exception_handler();
printf("Allocating test pages:\n");
normal_page = malloc_pages(MPAGE_SIZE, MPAGE_SIZE);
printf(" ... normal page at %p\n", normal_page);
big_page = malloc_pages(BPAGE_SIZE, MPAGE_SIZE);
printf(" ... big page at %p\n", big_page);
printf("Setting protection on test pages\n");
protect_pages(normal_page, MPAGE_SIZE, 0);
printf(" ... normal page %p set\n", normal_page);
protect_pages(big_page, MPAGE_SIZE, 0);
printf(" ... big page %p set\n", big_page);
printf("Writing to test pages\n");
normal_page[2] = 'A';
big_page[2] = 'A';
printf("Reading from test pages:\n");
printf(" ... normal_page %p's second byte is %c\n", normal_page, normal_page[2]);
printf(" ... big_page %p's second byte is %c\n", big_page, big_page[2]);
printf("Freeing test pages:\n");
free_pages(normal_page, MPAGE_SIZE);
printf(" ... freed normal page\n");
free_pages(big_page, MPAGE_SIZE);
printf(" ... freed big page\n");
}
int designate_modified(void *p)
{
if((p >= normal_page) && (p < (normal_page + MPAGE_SIZE))) {
protect_pages(p, MPAGE_SIZE, 1);
return 1;
}
if((p >= big_page) && (p < (big_page + BPAGE_SIZE))) {
protect_pages(p, BPAGE_SIZE, 1);
return 1;
}
printf("Unrecognized write: %p\n", p);
return 0;
}
static void flush_protect_page_ranges(int writeable)
{
Range *work;
compact_page_ranges(&protect_range);
for (work = protect_range.range_start; work; work = work->next) {
protect_pages((void *)work->start, work->len, writeable);
}
reset_page_ranges(&protect_range);
}