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Message-ID: <1430391165-30267-22-git-send-email-wangnan0@huawei.com>
Date: Thu, 30 Apr 2015 10:52:44 +0000
From: Wang Nan <wangnan0@...wei.com>
To: <ast@...mgrid.com>, <davem@...emloft.net>, <acme@...nel.org>,
<mingo@...hat.com>, <a.p.zijlstra@...llo.nl>,
<masami.hiramatsu.pt@...achi.com>, <jolsa@...nel.org>
CC: <lizefan@...nel.org>, <linux-kernel@...r.kernel.org>,
<pi3orama@....com>, <hekuang@...wei.com>
Subject: [RFC PATCH 21/22] perf bpf: probe at kprobe points.
---
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
--
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