* bytecode runtime.
*/
static
-int _lttng_filter_link_bytecode(const struct lttng_event_desc *event_desc,
+int link_bytecode(const struct lttng_event_desc *event_desc,
struct lttng_ctx *ctx,
struct lttng_bytecode_node *bytecode,
struct list_head *insert_loc)
if (ret) {
goto link_error;
}
- runtime->p.filter = lttng_bytecode_filter_interpret;
+
+ switch (bytecode->type) {
+ case LTTNG_BYTECODE_NODE_TYPE_FILTER:
+ runtime->p.interpreter_funcs.filter = lttng_bytecode_filter_interpret;
+ break;
+ case LTTNG_BYTECODE_NODE_TYPE_CAPTURE:
+ runtime->p.interpreter_funcs.capture = lttng_bytecode_capture_interpret_false;
+ break;
+ default:
+ WARN_ON(1);
+ }
+
runtime->p.link_failed = 0;
list_add_rcu(&runtime->p.node, insert_loc);
dbg_printk("Linking successful.\n");
return 0;
link_error:
- runtime->p.filter = lttng_bytecode_filter_interpret_false;
+
+ switch (bytecode->type) {
+ case LTTNG_BYTECODE_NODE_TYPE_FILTER:
+ runtime->p.interpreter_funcs.filter = lttng_bytecode_filter_interpret_false;
+ break;
+ case LTTNG_BYTECODE_NODE_TYPE_CAPTURE:
+ runtime->p.interpreter_funcs.capture = lttng_bytecode_capture_interpret_false;
+ break;
+ default:
+ WARN_ON(1);
+ }
runtime->p.link_failed = 1;
list_add_rcu(&runtime->p.node, insert_loc);
alloc_error:
return ret;
}
-void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime)
+void lttng_bytecode_filter_sync_state(struct lttng_bytecode_runtime *runtime)
+{
+ struct lttng_bytecode_node *bc = runtime->bc;
+
+ if (!bc->enabler->enabled || runtime->link_failed)
+ runtime->interpreter_funcs.filter = lttng_bytecode_filter_interpret_false;
+ else
+ runtime->interpreter_funcs.filter = lttng_bytecode_filter_interpret;
+}
+
+void lttng_bytecode_capture_sync_state(struct lttng_bytecode_runtime *runtime)
{
struct lttng_bytecode_node *bc = runtime->bc;
if (!bc->enabler->enabled || runtime->link_failed)
- runtime->filter = lttng_bytecode_filter_interpret_false;
+ runtime->interpreter_funcs.capture = lttng_bytecode_capture_interpret_false;
else
- runtime->filter = lttng_bytecode_filter_interpret;
+ runtime->interpreter_funcs.capture = lttng_bytecode_capture_interpret;
}
/*
- * Link bytecode for all enablers referenced by an event.
+ * Given the lists of bytecode programs of an instance (event or event
+ * notifier) and of a matching enabler, try to link all the enabler's bytecode
+ * programs with the instance.
+ *
+ * This function is called after we confirmed that name enabler and the
+ * instance are matching names (or glob pattern matching).
*/
void lttng_enabler_link_bytecode(const struct lttng_event_desc *event_desc,
struct lttng_ctx *ctx,
- struct list_head *bytecode_runtime_head,
- struct lttng_enabler *enabler)
+ struct list_head *instance_bytecode_head,
+ struct list_head *enabler_bytecode_head)
{
- struct lttng_bytecode_node *bc;
+ struct lttng_bytecode_node *enabler_bc;
struct lttng_bytecode_runtime *runtime;
- /* Can only be called for events with desc attached */
WARN_ON_ONCE(!event_desc);
- /* Link each bytecode. */
- list_for_each_entry(bc, &enabler->filter_bytecode_head, node) {
+ /* Go over all the bytecode programs of the enabler. */
+ list_for_each_entry(enabler_bc, enabler_bytecode_head, node) {
int found = 0, ret;
struct list_head *insert_loc;
- list_for_each_entry(runtime,
- bytecode_runtime_head, node) {
- if (runtime->bc == bc) {
+ /*
+ * Check if the current enabler bytecode program is already
+ * linked with the instance.
+ */
+ list_for_each_entry(runtime, instance_bytecode_head, node) {
+ if (runtime->bc == enabler_bc) {
found = 1;
break;
}
}
- /* Skip bytecode already linked */
+
+ /*
+ * Skip bytecode already linked, go to the next enabler
+ * bytecode program.
+ */
if (found)
continue;
* insert the new bytecode right after it.
*/
list_for_each_entry_reverse(runtime,
- bytecode_runtime_head, node) {
- if (runtime->bc->bc.seqnum <= bc->bc.seqnum) {
+ instance_bytecode_head, node) {
+ if (runtime->bc->bc.seqnum <= enabler_bc->bc.seqnum) {
/* insert here */
insert_loc = &runtime->node;
goto add_within;
}
}
/* Add to head to list */
- insert_loc = bytecode_runtime_head;
+ insert_loc = instance_bytecode_head;
add_within:
dbg_printk("linking bytecode\n");
- ret = _lttng_filter_link_bytecode(event_desc, ctx, bc,
- insert_loc);
+ ret = link_bytecode(event_desc, ctx, enabler_bc, insert_loc);
if (ret) {
dbg_printk("[lttng filter] warning: cannot link event bytecode\n");
}