#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: Test ftrace direct functions against kprobes
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# requires: kprobe_events
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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 build with 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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echo 'p:kwake wake_up_process task=$arg1' > kprobe_events
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start_direct() {
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echo > trace
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modprobe ftrace-direct
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sleep 1
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grep -q "my_direct_func: waking up" trace
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}
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stop_direct() {
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rmmod ftrace-direct
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}
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enable_probe() {
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echo > trace
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echo 1 > events/kprobes/kwake/enable
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sleep 1
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grep -q "kwake:" trace
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}
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disable_probe() {
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echo 0 > events/kprobes/kwake/enable
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}
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test_kprobes() {
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# probe -> direct -> no direct > no probe
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enable_probe
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start_direct
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stop_direct
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disable_probe
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# probe -> direct -> no probe > no direct
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enable_probe
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start_direct
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disable_probe
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stop_direct
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# direct -> probe -> no probe > no direct
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start_direct
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enable_probe
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disable_probe
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stop_direct
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# direct -> probe -> no direct > no noprobe
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start_direct
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enable_probe
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stop_direct
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disable_probe
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}
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test_kprobes
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# Now do this with a second registered direct function
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echo "Running with another ftrace direct function"
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modprobe ftrace-direct-too
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test_kprobes
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rmmod ftrace-direct-too
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echo > kprobe_events
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