selftests/ftrace: Add kprobe-event with symbol argument test

CONFIG_MODULE_UNLOAD=y

CONFIG_SAMPLES=y

CONFIG_SAMPLE_TRACE_PRINTK=m

CONFIG_KALLSYMS_ALL=y

#!/bin/sh

# SPDX-License-Identifier: GPL-2.0

# description: Kprobe event symbol argument

[ -f kprobe_events ] || exit_unsupported # this is configurable

SYMBOL="linux_proc_banner"

if [ ! -f /proc/kallsyms ]; then

  echo "Can not check the target symbol - please enable CONFIG_KALLSYMS"

  exit_unresolved

elif ! grep "$SYMBOL\$" /proc/kallsyms; then

  echo "Linux banner is not exported - please enable CONFIG_KALLSYMS_ALL"

  exit_unresolved

fi

: "Test get basic types symbol argument"

echo "p:testprobe_u _do_fork arg1=@linux_proc_banner:u64 arg2=@linux_proc_banner:u32 arg3=@linux_proc_banner:u16 arg4=@linux_proc_banner:u8" > kprobe_events

echo "p:testprobe_s _do_fork arg1=@linux_proc_banner:s64 arg2=@linux_proc_banner:s32 arg3=@linux_proc_banner:s16 arg4=@linux_proc_banner:s8" >> kprobe_events

if grep -q "x8/16/32/64" README; then

  echo "p:testprobe_x _do_fork arg1=@linux_proc_banner:x64 arg2=@linux_proc_banner:x32 arg3=@linux_proc_banner:x16 arg4=@linux_proc_banner:x8" >> kprobe_events

fi

echo "p:testprobe_bf _do_fork arg1=@linux_proc_banner:b8@4/32" >> kprobe_events

echo 1 > events/kprobes/enable

(echo "forked")

echo 0 > events/kprobes/enable

grep "testprobe_[usx]:.* arg1=.* arg2=.* arg3=.* arg4=.*" trace

grep "testprobe_bf:.* arg1=.*" trace

: "Test get string symbol argument"

echo "p:testprobe_str _do_fork arg1=@linux_proc_banner:string" > kprobe_events

echo 1 > events/kprobes/enable

(echo "forked")

echo 0 > events/kprobes/enable

RESULT=`grep "testprobe_str" trace | sed -e 's/.* arg1=\(.*\)/\1/'`

RESULT=`echo $RESULT | sed -e 's/.* \((.*)\) \((.*)\) .*/\1 \2/'`

ORIG=`cat /proc/version | sed -e 's/.* \((.*)\) \((.*)\) .*/\1 \2/'`

test "$RESULT" = "$ORIG"