* [PATCH lttng-tools] Fix: add missing UST perf counter support check
@ 2015-01-12 22:14 Mathieu Desnoyers
0 siblings, 0 replies; only message in thread
From: Mathieu Desnoyers @ 2015-01-12 22:14 UTC (permalink / raw)
To: jgalar; +Cc: lttng-dev
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 <mathieu.desnoyers@efficios.com>
---
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
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2015-01-12 22:14 [PATCH lttng-tools] Fix: add missing UST perf counter support check Mathieu Desnoyers
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