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authorMasami Hiramatsu <mhiramat@kernel.org>2018-08-30 23:23:18 +0900
committerShuah Khan (Samsung OSG) <shuah@kernel.org>2018-10-24 14:49:36 -0600
commit7bc026d6c0328f49469a56168b50ff7a498a5810 (patch)
treef771a2564984f25e17f72ad5f091c61c66b45f1e /tools
parent47c509d30db4cef11a406f87279633cd21380163 (diff)
downloadlinux-7bc026d6c0328f49469a56168b50ff7a498a5810.tar.bz2
selftests/ftrace: Add function filter on module testcase
Add a testcase for function filter on module. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/ftrace/test.d/ftrace/func_mod_trace.tc24
1 files changed, 24 insertions, 0 deletions
diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/func_mod_trace.tc b/tools/testing/selftests/ftrace/test.d/ftrace/func_mod_trace.tc
new file mode 100644
index 000000000000..9330c873f9fe
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/ftrace/func_mod_trace.tc
@@ -0,0 +1,24 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: ftrace - function trace on module
+
+[ ! -f set_ftrace_filter ] && exit_unsupported
+
+: "mod: allows to filter a non exist function"
+echo 'non_exist_func:mod:non_exist_module' > set_ftrace_filter
+grep -q "non_exist_func" set_ftrace_filter
+
+: "mod: on exist module"
+echo '*:mod:trace_printk' > set_ftrace_filter
+if ! modprobe trace-printk ; then
+ echo "No trace-printk sample module - please make CONFIG_SAMPLE_TRACE_PRINTK=
+m"
+ exit_unresolved;
+fi
+
+: "Wildcard should be resolved after loading module"
+grep -q "trace_printk_irq_work" set_ftrace_filter
+
+: "After removing the filter becomes empty"
+rmmod trace_printk
+test `cat set_ftrace_filter | wc -l` -eq 0