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Honor db_pager_quit in 'show threadchain', 'show allchains', and

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'show lockchain'.  This is especially helpful for the first 2 as a
threadchain could get stuck in an infinite loop during a mutex deadlock.
This commit is contained in:
John Baldwin 2006-07-12 21:25:24 +00:00
parent 19e9205a23
commit fed7988436
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=160313
1 changed files with 7 additions and 1 deletions
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8
sys/kern/subr_turnstile.c
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@ -1046,7 +1046,7 @@ print_threadchain(struct thread *td, const char *prefix)
* Follow the chain. We keep walking as long as the thread is
* blocked on a turnstile that has an owner.
*/
for (;;) {
while (!db_pager_quit) {
db_printf("%sthread %d (pid %d, %s) ", prefix, td->td_tid,
td->td_proc->p_pid, td->td_name[0] != '\0' ? td->td_name :
td->td_proc->p_comm);
@ -1110,6 +1110,8 @@ DB_SHOW_COMMAND(allchains, db_show_allchains)
db_printf("chain %d:\n", i++);
print_threadchain(td, " ");
}
if (db_pager_quit)
return;
}
}
}
@ -1122,6 +1124,8 @@ print_waiter(struct thread *td, int indent)
struct turnstile *ts;
int i;
if (db_pager_quit)
return;
for (i = 0; i < indent; i++)
db_printf(" ");
print_thread(td, "thread ");
@ -1137,6 +1141,8 @@ print_waiters(struct turnstile *ts, int indent)
struct thread *td;
int i;
if (db_pager_quit)
return;
lock = ts->ts_lockobj;
class = LOCK_CLASS(lock);
for (i = 0; i < indent; i++)