diff options
| -rw-r--r-- | tapset-perfmon.cxx | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/tapset-perfmon.cxx b/tapset-perfmon.cxx index 202834e7..81d6c2d7 100644 --- a/tapset-perfmon.cxx +++ b/tapset-perfmon.cxx @@ -196,6 +196,11 @@ perf_builder::build(systemtap_session & sess, literal_map_t const & parameters, vector<derived_probe *> & finished_results) { + // XXX need additional version checks too? + // --- perhaps look for export of perf_event_create_kernel_counter + if (sess.kernel_config["CONFIG_PERF_EVENTS"] != "y") + throw semantic_error ("perf probes not available without CONFIG_PERF_EVENTS"); + int64_t type; bool has_type = get_param(parameters, TOK_TYPE, type); assert(has_type); @@ -223,12 +228,6 @@ perf_builder::build(systemtap_session & sess, void register_tapset_perf(systemtap_session& s) { - // make sure we have support before registering anything - // XXX need additional version checks too? - // --- perhaps look for export of perf_event_create_kernel_counter - if (s.kernel_config["CONFIG_PERF_EVENTS"] != "y") - return; - // NB: at this point, the binding is *not* unprivileged. derived_probe_builder *builder = new perf_builder(); |