[RFC PATCH 21/22] perf bpf: probe at kprobe points.

Wang Nan
2015-04-30T10:55:23Z

---
tools/perf/util/bpf-loader.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c
index 208f5e8..186a3d0 100644
--- a/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
@@ -952,8 +952,26 @@ out:
return -1;
}

+static int bpf_probe(void)
+{
+ int err = add_perf_probe_events(params.event_array,
+ params.nr_events,
+ MAX_PROBES, 0);
+ /* add_perf_probe_events return negative when fail */
+ if (err < 0)
+ pr_err("bpf probe: failed to probe events\n");
+
+ return err < 0 ? err : 0;
+}
+
int bpf__run(void)
{
+ int err;
+
+ pr_debug("bpf: probing\n");
+ if ((err = bpf_probe()))
+ return err;
+
pr_info("BPF is running. Use Ctrl-c to stop.\n");
while(1)
sleep(1);
--
1.8.3.4