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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>
This commit is contained in:
Masami Hiramatsu 2018-08-30 23:23:18 +09:00 committed by Shuah Khan (Samsung OSG)
parent 47c509d30d
commit 7bc026d6c0
1 changed files with 24 additions and 0 deletions
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24
tools/testing/selftests/ftrace/test.d/ftrace/func_mod_trace.tc Normal file
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#!/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