static void
ktrace_set_owning_proc(proc_t p)
{
lck_mtx_assert(ktrace_lock, LCK_MTX_ASSERT_OWNED);
assert(p);
if (ktrace_state != KTRACE_STATE_FG) {
if (proc_uniqueid(p) == ktrace_bg_unique_id) {
ktrace_state = KTRACE_STATE_BG;
} else {
if (ktrace_state == KTRACE_STATE_BG) {
if (ktrace_active_mask & KTRACE_KPERF) {
kperf_reset();
}
if (ktrace_active_mask & KTRACE_KDEBUG) {
kdebug_reset();
}
ktrace_active_mask = 0;
}
ktrace_state = KTRACE_STATE_FG;
should_notify_on_init = FALSE;
}
}
ktrace_owning_unique_id = proc_uniqueid(p);
ktrace_owning_pid = proc_pid(p);
strlcpy(ktrace_last_owner_execname, proc_name_address(p),
sizeof(ktrace_last_owner_execname));
}
void
ktrace_kernel_configure(uint32_t config_mask)
{
lck_mtx_assert(ktrace_lock, LCK_MTX_ASSERT_OWNED);
if (ktrace_state != KTRACE_STATE_OFF) {
if (ktrace_active_mask & KTRACE_KPERF) {
kperf_reset();
}
if (ktrace_active_mask & KTRACE_KDEBUG) {
kdebug_reset();
}
}
ktrace_active_mask = config_mask;
ktrace_state = KTRACE_STATE_FG;
ktrace_release_ownership();
strlcpy(ktrace_last_owner_execname, "kernel_task",
sizeof(ktrace_last_owner_execname));
}
void
ktrace_reset(uint32_t reset_mask)
{
lck_mtx_assert(ktrace_lock, LCK_MTX_ASSERT_OWNED);
assert(reset_mask != 0);
if (ktrace_active_mask == 0) {
if (!ktrace_keep_ownership_on_reset) {
assert(ktrace_state == KTRACE_STATE_OFF);
}
return;
}
if (!ktrace_keep_ownership_on_reset) {
ktrace_active_mask &= ~reset_mask;
}
if (reset_mask & KTRACE_KPERF) {
kperf_reset();
}
if (reset_mask & KTRACE_KDEBUG) {
kdebug_reset();
}
if (ktrace_active_mask == 0) {
if (ktrace_state == KTRACE_STATE_FG) {
/* transition from foreground to background */
ktrace_promote_background();
} else if (ktrace_state == KTRACE_STATE_BG) {
/* background tool is resetting ktrace */
should_notify_on_init = TRUE;
ktrace_release_ownership();
ktrace_state = KTRACE_STATE_OFF;
}
}
}
static void
reset_ktrace(void)
{
kperf_reset();
}