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

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Add a testcase for kprobe-event with @symbol argument.
Since @symbol needs to refer the kernel data symbol
(linux_proc_banner), it requires CONFIG_KALLSYMS_ALL.

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 23:20:56 +09:00 committed by Shuah Khan (Samsung OSG)
parent 32f6e5da83
commit 873b4af210
2 changed files with 40 additions and 0 deletions
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1
tools/testing/selftests/ftrace/config
View File

@ -11,3 +11,4 @@ CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
CONFIG_SAMPLES=y
CONFIG_SAMPLE_TRACE_PRINTK=m
CONFIG_KALLSYMS_ALL=y

39
tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_symbol.tc Normal file
View File

@ -0,0 +1,39 @@
#!/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"