my_bool
check_scramble_323(const unsigned char *scrambled, const char *message,
ulong *hash_pass)
{
struct my_rnd_struct rand_st;
ulong hash_message[2];
/* Big enough for checks. */
uchar buff[16], scrambled_buff[SCRAMBLE_LENGTH_323 + 1];
uchar *to, extra;
const uchar *pos;
/* Ensure that the scrambled message is null-terminated. */
memcpy(scrambled_buff, scrambled, SCRAMBLE_LENGTH_323);
scrambled_buff[SCRAMBLE_LENGTH_323]= '\0';
scrambled= scrambled_buff;
hash_password(hash_message, message, SCRAMBLE_LENGTH_323);
my_rnd_init(&rand_st,hash_pass[0] ^ hash_message[0],
hash_pass[1] ^ hash_message[1]);
to=buff;
DBUG_ASSERT(sizeof(buff) > SCRAMBLE_LENGTH_323);
for (pos=scrambled ; *pos && to < buff+sizeof(buff) ; pos++)
*to++=(char) (floor(my_rnd(&rand_st)*31)+64);
if (pos-scrambled != SCRAMBLE_LENGTH_323)
return 1;
extra=(char) (floor(my_rnd(&rand_st)*31));
to=buff;
while (*scrambled)
{
if (*scrambled++ != (uchar) (*to++ ^ extra))
return 1; /* Wrong password */
}
return 0;
}
void scramble_323(char *to, const char *message, const char *password)
{
struct my_rnd_struct rand_st;
ulong hash_pass[2], hash_message[2];
if (password && password[0])
{
char extra, *to_start=to;
const char *message_end= message + SCRAMBLE_LENGTH_323;
hash_password(hash_pass,password, (uint) strlen(password));
hash_password(hash_message, message, SCRAMBLE_LENGTH_323);
my_rnd_init(&rand_st,hash_pass[0] ^ hash_message[0],
hash_pass[1] ^ hash_message[1]);
for (; message < message_end; message++)
*to++= (char) (floor(my_rnd(&rand_st)*31)+64);
extra=(char) (floor(my_rnd(&rand_st)*31));
while (to_start != to)
*(to_start++)^=extra;
}
*to= 0;
}
/*
stress test: wait on a random number of random threads.
it always succeeds (unless crashes or hangs).
*/
pthread_handler_t test_wt(void *arg)
{
int m, n, i, id, res;
struct my_rnd_struct rand;
my_thread_init();
mysql_mutex_lock(&mutex);
id= cnt++;
wt_thd_lazy_init(& thds[id].thd,
& wt_deadlock_search_depth_short, & wt_timeout_short,
& wt_deadlock_search_depth_long, & wt_timeout_long);
/* now, wait for everybody to be ready to run */
if (cnt >= THREADS)
mysql_cond_broadcast(&thread_sync);
else
while (cnt < THREADS)
mysql_cond_wait(&thread_sync, &mutex);
mysql_mutex_unlock(&mutex);
my_rnd_init(&rand, (ulong)(intptr)&m, id);
if (kill_strategy == YOUNGEST)
thds[id].thd.weight= (ulong)~my_getsystime();
if (kill_strategy == LOCKS)
thds[id].thd.weight= 0;
for (m= *(int *)arg; m ; m--)
{
WT_RESOURCE_ID resid;
int blockers[THREADS/10], j, k;
resid.value= id;
resid.type= &restype;
res= 0;
/* prepare for waiting for a random number of random threads */
for (j= n= (rnd() % THREADS)/10; !res && j >= 0; j--)
{
retry:
i= rnd() % (THREADS-1); /* pick a random thread */
if (i >= id) i++; /* with a number from 0 to THREADS-1 excluding ours */
for (k=n; k >=j; k--) /* the one we didn't pick before */
if (blockers[k] == i)
goto retry;
blockers[j]= i;
if (kill_strategy == RANDOM)
thds[id].thd.weight= rnd();
mysql_mutex_lock(& thds[i].lock);
res= wt_thd_will_wait_for(& thds[id].thd, & thds[i].thd, &resid);
mysql_mutex_unlock(& thds[i].lock);
}
if (!res)
{
mysql_mutex_lock(&lock);
res= wt_thd_cond_timedwait(& thds[id].thd, &lock);
mysql_mutex_unlock(&lock);
}
if (res)
{
mysql_mutex_lock(& thds[id].lock);
mysql_mutex_lock(&lock);
wt_thd_release_all(& thds[id].thd);
mysql_mutex_unlock(&lock);
mysql_mutex_unlock(& thds[id].lock);
if (kill_strategy == LOCKS)
thds[id].thd.weight= 0;
if (kill_strategy == YOUNGEST)
thds[id].thd.weight= (ulong)~my_getsystime();
}
else if (kill_strategy == LOCKS)
thds[id].thd.weight++;
}
mysql_mutex_lock(&mutex);
/* wait for everybody to finish */
if (!--cnt)
mysql_cond_broadcast(&thread_sync);
else
while (cnt)
mysql_cond_wait(&thread_sync, &mutex);
mysql_mutex_lock(& thds[id].lock);
mysql_mutex_lock(&lock);
wt_thd_release_all(& thds[id].thd);
mysql_mutex_unlock(&lock);
mysql_mutex_unlock(& thds[id].lock);
wt_thd_destroy(& thds[id].thd);
if (!--running_threads) /* now, signal when everybody is done with deinit */
mysql_cond_signal(&cond);
mysql_mutex_unlock(&mutex);
DBUG_PRINT("wt", ("exiting"));
my_thread_end();
return 0;
}
