static void
fbt_enable(void *arg, dtrace_id_t id, void *parg)
{
fbt_probe_t *fbt = parg;
modctl_t *ctl = fbt->fbtp_ctl;
ctl->nenabled++;
/*
* Now check that our modctl has the expected load count. If it
* doesn't, this module must have been unloaded and reloaded -- and
* we're not going to touch it.
*/
if (ctl->loadcnt != fbt->fbtp_loadcnt) {
if (fbt_verbose) {
printf("fbt is failing for probe %s "
"(module %s reloaded)",
fbt->fbtp_name, ctl->filename);
}
return;
}
for (; fbt != NULL; fbt = fbt->fbtp_next)
fbt_patch_tracepoint(fbt, fbt->fbtp_patchval);
}
static void
fbt_disable(void *arg, dtrace_id_t id, void *parg)
{
fbt_probe_t *fbt = parg, *hash;
modctl_t *ctl = fbt->fbtp_ctl;
ASSERT(ctl->nenabled > 0);
ctl->nenabled--;
if ((ctl->loadcnt != fbt->fbtp_loadcnt))
return;
for (; fbt != NULL; fbt = fbt->fbtp_probenext) {
fbt->fbtp_enabled--;
for (hash = fbt_probetab[FBT_ADDR2NDX(fbt->fbtp_patchpoint)];
hash != NULL; hash = hash->fbtp_hashnext) {
if (hash->fbtp_patchpoint == fbt->fbtp_patchpoint) {
for (; hash != NULL; hash = hash->fbtp_tracenext)
if (hash->fbtp_enabled > 0)
break;
break;
}
}
if (hash == NULL)
fbt_patch_tracepoint(fbt, fbt->fbtp_savedval);
}
}
static void
fbt_doubletrap(void)
{
fbt_probe_t *fbt;
int i;
for (i = 0; i < fbt_probetab_size; i++) {
fbt = fbt_probetab[i];
for (; fbt != NULL; fbt = fbt->fbtp_next)
fbt_patch_tracepoint(fbt, fbt->fbtp_savedval);
}
}
static void
fbt_resume(void *arg, dtrace_id_t id, void *parg)
{
fbt_probe_t *fbt = parg;
modctl_t *ctl = fbt->fbtp_ctl;
ASSERT(ctl->nenabled > 0);
if ((ctl->loadcnt != fbt->fbtp_loadcnt))
return;
for (; fbt != NULL; fbt = fbt->fbtp_next)
fbt_patch_tracepoint(fbt, fbt->fbtp_patchval);
}