#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: Test ftrace direct functions against tracers
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rmmod ftrace-direct ||:
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if ! modprobe ftrace-direct ; then
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echo "No ftrace-direct sample module - please make CONFIG_SAMPLE_FTRACE_DIRECT=m"
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exit_unresolved;
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fi
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echo "Let the module run a little"
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sleep 1
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grep -q "my_direct_func: waking up" trace
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rmmod ftrace-direct
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test_tracer() {
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tracer=$1
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# tracer -> direct -> no direct > no tracer
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echo $tracer > current_tracer
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modprobe ftrace-direct
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rmmod ftrace-direct
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echo nop > current_tracer
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# tracer -> direct -> no tracer > no direct
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echo $tracer > current_tracer
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modprobe ftrace-direct
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echo nop > current_tracer
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rmmod ftrace-direct
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# direct -> tracer -> no tracer > no direct
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modprobe ftrace-direct
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echo $tracer > current_tracer
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echo nop > current_tracer
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rmmod ftrace-direct
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# direct -> tracer -> no direct > no notracer
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modprobe ftrace-direct
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echo $tracer > current_tracer
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rmmod ftrace-direct
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echo nop > current_tracer
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}
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for t in `cat available_tracers`; do
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if [ "$t" != "nop" ]; then
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test_tracer $t
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fi
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done
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echo nop > current_tracer
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rmmod ftrace-direct ||:
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# Now do the same thing with another direct function registered
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echo "Running with another ftrace direct function"
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rmmod ftrace-direct-too ||:
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modprobe ftrace-direct-too
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for t in `cat available_tracers`; do
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if [ "$t" != "nop" ]; then
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test_tracer $t
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fi
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done
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echo nop > current_tracer
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rmmod ftrace-direct ||:
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rmmod ftrace-direct-too ||:
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