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Use kdb_thr_* to iterate over threads consistently in DDB.

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The "findstack", "show all trace", and "show active trace" commands
were iterating over allproc to enumerate threads.  This missed threads
executing in exit1() after being removed from allproc.

Reviewed by:	kib
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D27829
This commit is contained in:
John Baldwin 2020-12-31 16:01:35 -08:00
parent ae450907c6
commit 3e06c7da02
2 changed files with 22 additions and 26 deletions
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37
sys/ddb/db_command.c
View File

@ -847,32 +847,31 @@ db_stack_trace(db_expr_t tid, bool hastid, db_expr_t count, char *modif)
static void
_db_stack_trace_all(bool active_only)
{
struct proc *p;
struct thread *td;
jmp_buf jb;
void *prev_jb;
FOREACH_PROC_IN_SYSTEM(p) {
for (td = kdb_thr_first(); td != NULL; td = kdb_thr_next(td)) {
prev_jb = kdb_jmpbuf(jb);
if (setjmp(jb) == 0) {
FOREACH_THREAD_IN_PROC(p, td) {
if (td->td_state == TDS_RUNNING)
db_printf("\nTracing command %s pid %d"
" tid %ld td %p (CPU %d)\n",
p->p_comm, p->p_pid,
(long)td->td_tid, td,
td->td_oncpu);
else if (active_only)
continue;
else
db_printf("\nTracing command %s pid %d"
" tid %ld td %p\n", p->p_comm,
p->p_pid, (long)td->td_tid, td);
if (td->td_state == TDS_RUNNING)
db_printf("\nTracing command %s pid %d"
" tid %ld td %p (CPU %d)\n",
td->td_proc->p_comm, td->td_proc->p_pid,
(long)td->td_tid, td, td->td_oncpu);
else if (active_only)
continue;
else
db_printf("\nTracing command %s pid %d"
" tid %ld td %p\n", td->td_proc->p_comm,
td->td_proc->p_pid, (long)td->td_tid, td);
if (td->td_proc->p_flag & P_INMEM)
db_trace_thread(td, -1);
if (db_pager_quit) {
kdb_jmpbuf(prev_jb);
return;
}
else
db_printf("--- swapped out\n");
if (db_pager_quit) {
kdb_jmpbuf(prev_jb);
return;
}
}
kdb_jmpbuf(prev_jb);

11
sys/ddb/db_ps.c
View File

@ -512,7 +512,6 @@ void
db_findstack_cmd(db_expr_t addr, bool have_addr, db_expr_t dummy3 __unused,
char *dummy4 __unused)
{
struct proc *p;
struct thread *td;
vm_offset_t saddr;
@ -523,12 +522,10 @@ db_findstack_cmd(db_expr_t addr, bool have_addr, db_expr_t dummy3 __unused,
return;
}
FOREACH_PROC_IN_SYSTEM(p) {
FOREACH_THREAD_IN_PROC(p, td) {
if (kstack_contains(td, saddr, 1)) {
db_printf("Thread %p\n", td);
return;
}
for (td = kdb_thr_first(); td != NULL; td = kdb_thr_next(td)) {
if (kstack_contains(td, saddr, 1)) {
db_printf("Thread %p\n", td);
return;
}
}
}