selftests/ftrace: Add trace_printk sample module test

#!/bin/sh

# SPDX-License-Identifier: GPL-2.0

# description: Test trace_printk from module

rmmod trace-printk ||:

if ! modprobe trace-printk ; then

  echo "No trace-printk sample module - please make CONFIG_SAMPLE_TRACE_PRINTK=m"

  exit_unresolved;

fi

echo "Waiting for irq work"

sleep 1

grep -q ": This .* trace_bputs" trace

grep -q ": This .* trace_puts" trace

grep -q ": This .* trace_bprintk" trace

grep -q ": This .* trace_printk" trace

grep -q ": (irq) .* trace_bputs" trace

grep -q ": (irq) .* trace_puts" trace

grep -q ": (irq) .* trace_bprintk" trace

grep -q ": (irq) .* trace_printk" trace

grep -q "This is a %s that will use trace_bprintk" printk_formats

grep -q "(irq) This is a static string that will use trace_bputs" printk_formats

rmmod trace-printk ||: