Report whether performance counters are supported by UST on the architecture as soon as the user try to enable a perf counter context.
Fixes #851 Signed-off-by: Mathieu Desnoyers <[email protected]> --- src/bin/lttng-sessiond/trace-ust.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/src/bin/lttng-sessiond/trace-ust.c b/src/bin/lttng-sessiond/trace-ust.c index a3e25aa..4f06f1b 100644 --- a/src/bin/lttng-sessiond/trace-ust.c +++ b/src/bin/lttng-sessiond/trace-ust.c @@ -470,7 +470,12 @@ int trace_ust_context_type_event_to_ust(enum lttng_event_context_type type) utype = LTTNG_UST_CONTEXT_IP; break; case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER: - utype = LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER; + if (!ustctl_has_perf_counters()) { + utype = -1; + WARN("Perf counters not implemented in UST"); + } else { + utype = LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER; + } break; default: ERR("Invalid UST context"); -- 2.1.1 _______________________________________________ lttng-dev mailing list [email protected] http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
