void side_call(const struct side_event_description *desc, const struct side_arg_vec *side_arg_vec)
{
+ struct side_event_state *event_state;
struct side_rcu_read_state rcu_read_state;
const struct side_callback *side_cb;
uintptr_t enabled;
printf("ERROR: unexpected variadic event description\n");
abort();
}
- enabled = __atomic_load_n(&desc->state->enabled, __ATOMIC_RELAXED);
+ event_state = side_ptr_get(desc->state);
+ enabled = __atomic_load_n(&event_state->enabled, __ATOMIC_RELAXED);
if (side_unlikely(enabled & SIDE_EVENT_ENABLED_KERNEL_USER_EVENT_MASK)) {
// TODO: call kernel write.
}
side_rcu_read_begin(&rcu_gp, &rcu_read_state);
- for (side_cb = side_rcu_dereference(desc->state->callbacks); side_cb->u.call != NULL; side_cb++)
+ for (side_cb = side_rcu_dereference(event_state->callbacks); side_cb->u.call != NULL; side_cb++)
side_cb->u.call(desc, side_arg_vec, side_cb->priv);
side_rcu_read_end(&rcu_gp, &rcu_read_state);
}
const struct side_arg_vec *side_arg_vec,
const struct side_arg_dynamic_struct *var_struct)
{
+ struct side_event_state *event_state;
struct side_rcu_read_state rcu_read_state;
const struct side_callback *side_cb;
uintptr_t enabled;
printf("ERROR: unexpected non-variadic event description\n");
abort();
}
- enabled = __atomic_load_n(&desc->state->enabled, __ATOMIC_RELAXED);
+ event_state = side_ptr_get(desc->state);
+ enabled = __atomic_load_n(&event_state->enabled, __ATOMIC_RELAXED);
if (side_unlikely(enabled & SIDE_EVENT_ENABLED_KERNEL_USER_EVENT_MASK)) {
// TODO: call kernel write.
}
side_rcu_read_begin(&rcu_gp, &rcu_read_state);
- for (side_cb = side_rcu_dereference(desc->state->callbacks); side_cb->u.call_variadic != NULL; side_cb++)
+ for (side_cb = side_rcu_dereference(event_state->callbacks); side_cb->u.call_variadic != NULL; side_cb++)
side_cb->u.call_variadic(desc, side_arg_vec, var_struct, side_cb->priv);
side_rcu_read_end(&rcu_gp, &rcu_read_state);
}
const struct side_event_description *desc,
void *call, void *priv)
{
+ struct side_event_state *event_state = side_ptr_get(desc->state);
const struct side_callback *cb;
- for (cb = desc->state->callbacks; cb->u.call != NULL; cb++) {
+ for (cb = event_state->callbacks; cb->u.call != NULL; cb++) {
if ((void *) cb->u.call == call && cb->priv == priv)
return cb;
}
int _side_tracer_callback_register(struct side_event_description *desc,
void *call, void *priv)
{
+ struct side_event_state *event_state;
struct side_callback *old_cb, *new_cb;
int ret = SIDE_ERROR_OK;
uint32_t old_nr_cb;
if (!initialized)
side_init();
pthread_mutex_lock(&side_lock);
- old_nr_cb = desc->state->nr_callbacks;
+ event_state = side_ptr_get(desc->state);
+ old_nr_cb = event_state->nr_callbacks;
if (old_nr_cb == UINT32_MAX) {
ret = SIDE_ERROR_INVAL;
goto unlock;
ret = SIDE_ERROR_EXIST;
goto unlock;
}
- old_cb = (struct side_callback *) desc->state->callbacks;
+ old_cb = (struct side_callback *) event_state->callbacks;
/* old_nr_cb + 1 (new cb) + 1 (NULL) */
new_cb = (struct side_callback *) calloc(old_nr_cb + 2, sizeof(struct side_callback));
if (!new_cb) {
new_cb[old_nr_cb].u.call =
(side_tracer_callback_func) call;
new_cb[old_nr_cb].priv = priv;
- side_rcu_assign_pointer(desc->state->callbacks, new_cb);
+ side_rcu_assign_pointer(event_state->callbacks, new_cb);
side_rcu_wait_grace_period(&rcu_gp);
if (old_nr_cb)
free(old_cb);
- desc->state->nr_callbacks++;
+ event_state->nr_callbacks++;
/* Increment concurrently with kernel setting the top bits. */
if (!old_nr_cb)
- (void) __atomic_add_fetch(&desc->state->enabled, 1, __ATOMIC_RELAXED);
+ (void) __atomic_add_fetch(&event_state->enabled, 1, __ATOMIC_RELAXED);
unlock:
pthread_mutex_unlock(&side_lock);
return ret;
static int _side_tracer_callback_unregister(struct side_event_description *desc,
void *call, void *priv)
{
+ struct side_event_state *event_state;
struct side_callback *old_cb, *new_cb;
const struct side_callback *cb_pos;
uint32_t pos_idx;
if (!initialized)
side_init();
pthread_mutex_lock(&side_lock);
+ event_state = side_ptr_get(desc->state);
cb_pos = side_tracer_callback_lookup(desc, call, priv);
if (!cb_pos) {
ret = SIDE_ERROR_NOENT;
goto unlock;
}
- old_nr_cb = desc->state->nr_callbacks;
- old_cb = (struct side_callback *) desc->state->callbacks;
+ old_nr_cb = event_state->nr_callbacks;
+ old_cb = (struct side_callback *) event_state->callbacks;
if (old_nr_cb == 1) {
new_cb = (struct side_callback *) &side_empty_callback;
} else {
- pos_idx = cb_pos - desc->state->callbacks;
+ pos_idx = cb_pos - event_state->callbacks;
/* Remove entry at pos_idx. */
/* old_nr_cb - 1 (removed cb) + 1 (NULL) */
new_cb = (struct side_callback *) calloc(old_nr_cb, sizeof(struct side_callback));
memcpy(new_cb, old_cb, pos_idx);
memcpy(&new_cb[pos_idx], &old_cb[pos_idx + 1], old_nr_cb - pos_idx - 1);
}
- side_rcu_assign_pointer(desc->state->callbacks, new_cb);
+ side_rcu_assign_pointer(event_state->callbacks, new_cb);
side_rcu_wait_grace_period(&rcu_gp);
free(old_cb);
- desc->state->nr_callbacks--;
+ event_state->nr_callbacks--;
/* Decrement concurrently with kernel setting the top bits. */
if (old_nr_cb == 1)
- (void) __atomic_add_fetch(&desc->state->enabled, -1, __ATOMIC_RELAXED);
+ (void) __atomic_add_fetch(&event_state->enabled, -1, __ATOMIC_RELAXED);
unlock:
pthread_mutex_unlock(&side_lock);
return ret;
static
void side_event_remove_callbacks(struct side_event_description *desc)
{
- uint32_t nr_cb = desc->state->nr_callbacks;
+ struct side_event_state *event_state = side_ptr_get(desc->state);
+ uint32_t nr_cb = event_state->nr_callbacks;
struct side_callback *old_cb;
if (!nr_cb)
return;
- old_cb = (struct side_callback *) desc->state->callbacks;
- (void) __atomic_add_fetch(&desc->state->enabled, -1, __ATOMIC_RELAXED);
+ old_cb = (struct side_callback *) event_state->callbacks;
+ (void) __atomic_add_fetch(&event_state->enabled, -1, __ATOMIC_RELAXED);
/*
* Setting the state back to 0 cb and empty callbacks out of
* caution. This should not matter because instrumentation is
* unreachable.
*/
- desc->state->nr_callbacks = 0;
- side_rcu_assign_pointer(desc->state->callbacks, &side_empty_callback);
+ event_state->nr_callbacks = 0;
+ side_rcu_assign_pointer(event_state->callbacks, &side_empty_callback);
/*
* No need to wait for grace period because instrumentation is
* unreachable.
const struct side_arg *sav = side_ptr_get(side_arg_vec->sav);
uint32_t i, side_sav_len = side_arg_vec->len;
- printf("provider: %s, event: %s", desc->provider_name, desc->event_name);
+ printf("provider: %s, event: %s", side_ptr_get(desc->provider_name), side_ptr_get(desc->event_name));
if (desc->nr_fields != side_sav_len) {
fprintf(stderr, "ERROR: number of fields mismatch between description and arguments\n");
abort();
printf("%s", side_sav_len ? ", fields: [ " : "");
for (i = 0; i < side_sav_len; i++) {
printf("%s", i ? ", " : "");
- tracer_print_field(&desc->fields[i], &sav[i]);
+ tracer_print_field(&side_ptr_get(desc->fields)[i], &sav[i]);
}
if (nr_items)
*nr_items = i;
if (!event)
continue;
printf("provider: %s, event: %s\n",
- event->provider_name, event->event_name);
+ side_ptr_get(event->provider_name), side_ptr_get(event->event_name));
if (notif == SIDE_TRACER_NOTIFICATION_INSERT_EVENTS) {
if (event->flags & SIDE_EVENT_FLAG_VARIADIC) {
ret = side_tracer_callback_variadic_register(event, tracer_call_variadic, NULL);