linux-kernel - [PATCH 10/11] perf probe: Add function to post process kernel trace events

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Message-Id: <1470758494-32127-11-git-send-email-acme@kernel.org>
Date:	Tue,  9 Aug 2016 13:01:33 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	linux-kernel@...r.kernel.org,
	Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Balbir Singh <bsingharora@...il.com>,
	Namhyung Kim <namhyung@...nel.org>,
	"Naveen N . Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Wang Nan <wangnan0@...wei.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 10/11] perf probe: Add function to post process kernel trace events

From: Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>

Instead of inline code, introduce function to post process kernel
probe trace events.

Signed-off-by: Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
Acked-by: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Ananth N Mavinakayanahalli <ananth@...ibm.com>
Cc: Balbir Singh <bsingharora@...il.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Wang Nan <wangnan0@...wei.com>
Link: http://lkml.kernel.org/r/1470723805-5081-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/probe-event.c | 29 ++++++++++++++++++-----------
 1 file changed, 18 insertions(+), 11 deletions(-)

diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 1201f73ca723..234fbfb5c2ed 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -666,22 +666,14 @@ static int add_module_to_probe_trace_events(struct probe_trace_event *tevs,
 	return ret;
 }
 
-/* Post processing the probe events */
-static int post_process_probe_trace_events(struct probe_trace_event *tevs,
-					   int ntevs, const char *module,
-					   bool uprobe)
+static int
+post_process_kernel_probe_trace_events(struct probe_trace_event *tevs,
+				       int ntevs)
 {
 	struct ref_reloc_sym *reloc_sym;
 	char *tmp;
 	int i, skipped = 0;
 
-	if (uprobe)
-		return add_exec_to_probe_trace_events(tevs, ntevs, module);
-
-	/* Note that currently ref_reloc_sym based probe is not for drivers */
-	if (module)
-		return add_module_to_probe_trace_events(tevs, ntevs, module);
-
 	reloc_sym = kernel_get_ref_reloc_sym();
 	if (!reloc_sym) {
 		pr_warning("Relocated base symbol is not found!\n");
@@ -713,6 +705,21 @@ static int post_process_probe_trace_events(struct probe_trace_event *tevs,
 	return skipped;
 }
 
+/* Post processing the probe events */
+static int post_process_probe_trace_events(struct probe_trace_event *tevs,
+					   int ntevs, const char *module,
+					   bool uprobe)
+{
+	if (uprobe)
+		return add_exec_to_probe_trace_events(tevs, ntevs, module);
+
+	if (module)
+		/* Currently ref_reloc_sym based probe is not for drivers */
+		return add_module_to_probe_trace_events(tevs, ntevs, module);
+
+	return post_process_kernel_probe_trace_events(tevs, ntevs);
+}
+
 /* Try to find perf_probe_event with debuginfo */
 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
 					  struct probe_trace_event **tevs)
-- 
2.7.4