/*
* Fork and then allocate in both the parent and the child, in case
* fork messes up the heap. Note: this is not intended to test the
* parent and child running concurrently -- that should probably be
* its own test program.
*/
static
void
test12(void)
{
pid_t pid;
void *p;
tprintf("Forking...\n");
pid = dofork();
if (pid == 0) {
/* child */
say("Child allocating a page...\n");
p = dosbrk(PAGE_SIZE);
markpage(p, 0);
if (checkpage(p, 0, false)) {
errx(1, "FAILED: data corrupt in child");
}
say("Child done.\n");
exit(0);
}
/* parent */
say("Parent allocating a page...\n");
p = dosbrk(PAGE_SIZE);
markpage(p, 0);
if (checkpage(p, 0, false)) {
errx(1, "FAILED: data corrupt in parent");
}
say("Parent done.\n");
dowait(pid);
tprintf("Passed sbrk test 12.\n");
success(TEST161_SUCCESS, SECRET, "/testbin/sbrktest");
}
/*
* Allocate, then fork, then free the allocated page in the child.
*/
static
void
test14(void)
{
pid_t pid;
void *p;
tprintf("Allocating a page...\n");
p = dosbrk(PAGE_SIZE);
markpage(p, 0);
if (checkpage(p, 0, false)) {
errx(1, "FAILED: data corrupt before forking");
}
tprintf("Forking...\n");
pid = dofork();
if (pid == 0) {
/* child */
if (checkpage(p, 0, false)) {
errx(1, "FAILED: data corrupt in child");
}
tprintf("Child freeing a page...\n");
dosbrk(-PAGE_SIZE);
exit(0);
}
dowait(pid);
if (checkpage(p, 0, false)) {
errx(1, "FAILED: data corrupt in parent after child ran");
}
tprintf("Passed sbrk test 14.\n");
success(TEST161_SUCCESS, SECRET, "/testbin/sbrktest");
}
/*
* Allocate one page, check that it holds data, and free it.
*/
static
void
test2(void)
{
void *op, *p, *q;
op = dosbrk(0);
tprintf("Allocating a page...\n");
p = dosbrk(PAGE_SIZE);
if (p != op) {
errx(1, "FAILED: sbrk grow didn't return the old break "
"(got %p, expected %p", p, op);
}
markpage(p, 0);
if (checkpage(p, 0, false)) {
errx(1, "FAILED: data corrupt");
}
p = dosbrk(0);
tprintf("Freeing the page...\n");
q = dosbrk(-PAGE_SIZE);
if (q != p) {
errx(1, "FAILED: sbrk shrink didn't return the old break "
"(got %p, expected %p", q, p);
}
q = dosbrk(0);
if (q != op) {
errx(1, "FAILED: sbrk shrink didn't restore the heap "
"(got %p, expected %p", q, op);
}
success(TEST161_SUCCESS, SECRET, "/testbin/sbrktest");
}
static
void
test22(void)
{
int i;
void *p, *q;
int num = 10;
int num_pages = 5 * 1024; // 20MB
p = dosbrk(num_pages * PAGE_SIZE);
q = dosbrk(0);
if ((unsigned int)q - (unsigned int)p != (unsigned int)(num_pages*PAGE_SIZE)) {
errx(1, "Heap size not equal to expected size: p=0x%x q=0x%x", (unsigned int)p, (unsigned int)q);
}
// Just touch the last 10 pages
for (i = 0; i < num; i++) {
markpage(p, num_pages-(i+1));
}
// Check the last 10 pages
for (i = 0; i < num; i++) {
if (checkpage(p, num_pages-(i+1), false)) {
errx(1, "FAILED: data corrupt");
}
}
success(TEST161_SUCCESS, SECRET, "/testbin/sbrktest");
}
/*
* Allocate and then fork, in case fork doesn't preserve the heap.
*/
static
void
test13(void)
{
pid_t pid;
void *p;
printf("Allocating a page...\n");
p = dosbrk(PAGE_SIZE);
markpage(p, 0);
if (checkpage(p, 0, false)) {
errx(1, "FAILED: data corrupt before forking");
}
printf("Forking...\n");
pid = dofork();
if (pid == 0) {
/* child */
if (checkpage(p, 0, false)) {
errx(1, "FAILED: data corrupt in child");
}
exit(0);
}
if (checkpage(p, 0, false)) {
errx(1, "FAILED: data corrupt in parent");
}
dowait(pid);
printf("Passed sbrk test 13.\n");
}
/*
* Allocate six pages, check that they hold data and that the pages
* don't get mixed up, and free them one at a time, repeating the
* check after each free.
*/
static
void
test4(void)
{
const unsigned num = 6;
void *op, *p, *q;
unsigned i, j;
bool bad;
op = dosbrk(0);
printf("Allocating %u pages...\n", num);
p = dosbrk(PAGE_SIZE * num);
if (p != op) {
errx(1, "FAILED: sbrk grow didn't return the old break "
"(got %p, expected %p", p, op);
}
bad = false;
for (i=0; i<num; i++) {
markpage(p, i);
if (checkpage(p, i, false)) {
warnx("FAILED: data corrupt on page %u", i);
bad = true;
}
}
if (bad) {
exit(1);
}
printf("Freeing the pages one at a time...\n");
for (i=num; i-- > 0; ) {
(void)dosbrk(-PAGE_SIZE);
for (j=0; j<i; j++) {
if (checkpage(p, j, false)) {
warnx("FAILED: data corrupt on page %u "
"after freeing %u pages", j, i);
bad = true;
}
}
}
if (bad) {
exit(1);
}
q = dosbrk(0);
if (q != op) {
errx(1, "FAILED: sbrk shrink didn't restore the heap "
"(got %p, expected %p", q, op);
}
printf("Passed sbrk test 4.\n");
}
/*
* Allocate one page, check that it holds data, and leak it.
*/
static
void
test1(void)
{
void *p;
tprintf("Allocating a page...\n");
p = dosbrk(PAGE_SIZE);
markpage(p, 0);
if (checkpage(p, 0, false)) {
errx(1, "FAILED: data corrupt");
}
success(TEST161_SUCCESS, SECRET, "/testbin/sbrktest");
}
/*
* Allocate one page, check that it holds data, and leak it.
*/
static
void
test1(void)
{
void *p;
printf("Allocating a page...\n");
p = dosbrk(PAGE_SIZE);
markpage(p, 0);
if (checkpage(p, 0, false)) {
errx(1, "FAILED: data corrupt");
}
printf("Passed sbrk test 1.\n");
}
/*
* Allocate all of memory one page at a time. The same restrictions
* and considerations apply as above.
*/
static
void
test10(void)
{
void *p, *op;
unsigned i, n;
bool bad;
tprintf("Allocating all of memory one page at a time:\n");
op = dosbrk(0);
n = 0;
while ((p = sbrk(PAGE_SIZE)) != (void *)-1) {
markpagelight(op, n);
n++;
}
tprintf("Got %u pages (%zu bytes).\n", n, (size_t)PAGE_SIZE * n);
tprintf("Now freeing them.\n");
bad = false;
for (i=0; i<n; i++) {
if (checkpagelight(op, n - i - 1, false)) {
warnx("FAILED: data corrupt on page %u", i);
bad = true;
}
(void)dosbrk(-PAGE_SIZE);
}
if (bad) {
exit(1);
}
tprintf("Freed %u pages.\n", n);
p = dosbrk(0);
if (p != op) {
errx(1, "FAILURE: break did not return to original value");
}
tprintf("Now let's see if I can allocate another page.\n");
p = dosbrk(PAGE_SIZE);
markpage(p, 0);
if (checkpage(p, 0, false)) {
errx(1, "FAILED: data corrupt");
}
(void)dosbrk(-PAGE_SIZE);
tprintf("Passed sbrk test 10.\n");
success(TEST161_SUCCESS, SECRET, "/testbin/sbrktest");
}
/*
* Allocate six pages, check that they hold data and that the
* pages don't get mixed up, and free them.
*/
static
void
test3(void)
{
const unsigned num = 6;
void *op, *p, *q;
unsigned i;
bool bad;
op = dosbrk(0);
tprintf("Allocating %u pages...\n", num);
p = dosbrk(PAGE_SIZE * num);
if (p != op) {
errx(1, "FAILED: sbrk grow didn't return the old break "
"(got %p, expected %p", p, op);
}
bad = false;
for (i=0; i<num; i++) {
markpage(p, i);
if (checkpage(p, i, false)) {
warnx("FAILED: data corrupt on page %u", i);
bad = true;
}
}
if (bad) {
exit(1);
}
p = dosbrk(0);
tprintf("Freeing the pages...\n");
q = dosbrk(-PAGE_SIZE * num);
if (q != p) {
errx(1, "FAILED: sbrk shrink didn't return the old break "
"(got %p, expected %p", q, p);
}
q = dosbrk(0);
if (q != op) {
errx(1, "FAILED: sbrk shrink didn't restore the heap "
"(got %p, expected %p", q, op);
}
success(TEST161_SUCCESS, SECRET, "/testbin/sbrktest");
}
/*
* Allocate and free in both the parent and the child, and do more
* than one page.
*/
static
void
test15(void)
{
unsigned num = 12;
pid_t pid;
unsigned i;
void *p;
tprintf("Allocating %u pages...\n", num);
p = dosbrk(PAGE_SIZE * num);
for (i=0; i<num; i++) {
markpage(p, i);
}
for (i=0; i<num; i++) {
if (checkpage(p, i, false)) {
errx(1, "FAILED: data corrupt before forking");
}
}
tprintf("Freeing one page...\n");
(void)dosbrk(-PAGE_SIZE);
num--;
for (i=0; i<num; i++) {
if (checkpage(p, i, false)) {
errx(1, "FAILED: data corrupt before forking (2)");
}
}
tprintf("Allocating two pages...\n");
(void)dosbrk(PAGE_SIZE * 2);
markpage(p, num++);
markpage(p, num++);
for (i=0; i<num; i++) {
if (checkpage(p, i, false)) {
errx(1, "FAILED: data corrupt before forking (3)");
}
}
tprintf("Forking...\n");
pid = dofork();
if (pid == 0) {
/* child */
for (i=0; i<num; i++) {
if (checkpage(p, i, false)) {
errx(1, "FAILED: data corrupt in child");
}
}
say("Child: freeing three pages\n");
dosbrk(-PAGE_SIZE * 3);
num -= 3;
for (i=0; i<num; i++) {
if (checkpage(p, i, false)) {
errx(1, "FAILED: data corrupt in child (2)");
}
}
say("Child: allocating two pages\n");
dosbrk(PAGE_SIZE * 2);
markpage(p, num++);
markpage(p, num++);
for (i=0; i<num; i++) {
if (checkpage(p, i, false)) {
errx(1, "FAILED: data corrupt in child (3)");
}
}
say("Child: freeing all\n");
dosbrk(-PAGE_SIZE * num);
exit(0);
}
say("Parent: allocating four pages\n");
dosbrk(PAGE_SIZE * 4);
for (i=0; i<4; i++) {
markpage(p, num++);
}
for (i=0; i<num; i++) {
if (checkpage(p, i, false)) {
errx(1, "FAILED: data corrupt in parent");
}
}
say("Parent: waiting\n");
dowait(pid);
for (i=0; i<num; i++) {
if (checkpage(p, i, false)) {
errx(1, "FAILED: data corrupt after waiting");
}
}
(void)dosbrk(-PAGE_SIZE * num);
tprintf("Passed sbrk test 15.\n");
success(TEST161_SUCCESS, SECRET, "/testbin/sbrktest");
}
