+static
+int apply_context_reloc(struct lttng_event *event,
+ struct bytecode_runtime *runtime,
+ uint32_t runtime_len,
+ uint32_t reloc_offset,
+ const char *context_name)
+{
+ struct field_ref *field_ref;
+ struct load_op *op;
+ struct lttng_ctx_field *ctx_field;
+ int idx;
+ struct lttng_session *session = runtime->p.session;
+
+ dbg_printf("Apply context reloc: %u %s\n", reloc_offset, context_name);
+
+ /* Get context index */
+ idx = lttng_get_context_index(session->ctx, context_name);
+ if (idx < 0) {
+ if (lttng_context_is_app(context_name)) {
+ int ret;
+
+ ret = lttng_ust_add_app_context_to_ctx_rcu(context_name,
+ &session->ctx);
+ if (ret)
+ return ret;
+ idx = lttng_get_context_index(session->ctx,
+ context_name);
+ if (idx < 0)
+ return -ENOENT;
+ } else {
+ return -ENOENT;
+ }
+ }
+ /* Check if idx is too large for 16-bit offset */
+ if (idx > FILTER_BYTECODE_MAX_LEN - 1)
+ return -EINVAL;
+
+ /* Get context return type */
+ ctx_field = &session->ctx->fields[idx];
+ op = (struct load_op *) &runtime->data[reloc_offset];
+ field_ref = (struct field_ref *) op->data;
+ switch (ctx_field->event_field.type.atype) {
+ case atype_integer:
+ case atype_enum:
+ op->op = FILTER_OP_GET_CONTEXT_REF_S64;
+ break;
+ /* Sequence and array supported as string */
+ case atype_string:
+ case atype_array:
+ case atype_sequence:
+ op->op = FILTER_OP_GET_CONTEXT_REF_STRING;
+ break;
+ case atype_float:
+ op->op = FILTER_OP_GET_CONTEXT_REF_DOUBLE;
+ break;
+ case atype_dynamic:
+ op->op = FILTER_OP_GET_CONTEXT_REF;
+ break;
+ default:
+ return -EINVAL;
+ }
+ /* set offset to context index within channel contexts */
+ field_ref->offset = (uint16_t) idx;
+ return 0;
+}
+
+static
+int apply_reloc(struct lttng_event *event,
+ struct bytecode_runtime *runtime,
+ uint32_t runtime_len,
+ uint32_t reloc_offset,
+ const char *name)
+{
+ struct load_op *op;
+
+ dbg_printf("Apply reloc: %u %s\n", reloc_offset, name);
+
+ /* Ensure that the reloc is within the code */
+ if (runtime_len - reloc_offset < sizeof(uint16_t))
+ return -EINVAL;
+
+ op = (struct load_op *) &runtime->data[reloc_offset];
+ switch (op->op) {
+ case FILTER_OP_LOAD_FIELD_REF:
+ return apply_field_reloc(event, runtime, runtime_len,
+ reloc_offset, name);
+ case FILTER_OP_GET_CONTEXT_REF:
+ return apply_context_reloc(event, runtime, runtime_len,
+ reloc_offset, name);
+ default:
+ ERR("Unknown reloc op type %u\n", op->op);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static
+int bytecode_is_linked(struct lttng_ust_filter_bytecode_node *filter_bytecode,
+ struct lttng_event *event)
+{
+ struct lttng_bytecode_runtime *bc_runtime;
+
+ cds_list_for_each_entry(bc_runtime,
+ &event->bytecode_runtime_head, node) {
+ if (bc_runtime->bc == filter_bytecode)
+ return 1;
+ }
+ return 0;
+}
+