From 6009177fd9ec7b5ca9b93ecdbadd4bc7e9c48141 Mon Sep 17 00:00:00 2001 From: Donglin Peng Date: Sat, 8 Apr 2023 05:42:22 -0700 Subject: selftests/ftrace: Add funcgraph-retval test case Add a test case for the funcgraph-retval and funcgraph-retval-hex trace options. Link: https://lkml.kernel.org/r/9fedbd25e63f012cade5dad13be21225fec2fb5d.1680954589.git.pengdonglin@sangfor.com.cn Signed-off-by: Donglin Peng Acked-by: Masami Hiramatsu (Google) Signed-off-by: Steven Rostedt (Google) --- .../ftrace/test.d/ftrace/fgraph-retval.tc | 44 ++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/fgraph-retval.tc (limited to 'tools/testing/selftests/ftrace') diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-retval.tc b/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-retval.tc new file mode 100644 index 000000000000..e34c0bdef3ed --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-retval.tc @@ -0,0 +1,44 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: ftrace - function graph print function return value +# requires: options/funcgraph-retval options/funcgraph-retval-hex function_graph:tracer + +# Make sure that funcgraph-retval works + +fail() { # msg + echo $1 + exit_fail +} + +disable_tracing +clear_trace + +# get self PID, can not use $$, because it is PPID +read PID _ < /proc/self/stat + +[ -f set_ftrace_filter ] && echo proc_reg_write > set_ftrace_filter +[ -f set_ftrace_pid ] && echo ${PID} > set_ftrace_pid +echo function_graph > current_tracer +echo 1 > options/funcgraph-retval + +set +e +enable_tracing +echo > /proc/interrupts +disable_tracing +set -e + +: "Test printing the error code in signed decimal format" +echo 0 > options/funcgraph-retval-hex +count=`cat trace | grep 'proc_reg_write' | grep '= -5' | wc -l` +if [ $count -eq 0 ]; then + fail "Return value can not be printed in signed decimal format" +fi + +: "Test printing the error code in hexadecimal format" +echo 1 > options/funcgraph-retval-hex +count=`cat trace | grep 'proc_reg_write' | grep 'fffffffb' | wc -l` +if [ $count -eq 0 ]; then + fail "Return value can not be printed in hexadecimal format" +fi + +exit 0 -- cgit v1.2.3-59-g8ed1b