From: Steven Rostedt (VMware) Date: Tue, 18 Apr 2017 15:22:38 +0000 (-0400) Subject: selftests: ftrace: Add test to test reading of set_ftrace_file X-Git-Tag: v4.14-rc1~1001^2~30 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a9064f676ed6de7bf3a07e26fc19494d48fa4619;p=platform%2Fkernel%2Flinux-rpi.git selftests: ftrace: Add test to test reading of set_ftrace_file The set_ftrace_file lists both functions that are filtered, as well as function probes (triggers) that are attached to a function, like traceon or stacktrace, etc. The reading of this file is not as trivial as most pseudo files are, and there's been various bugs that have appeared in the past when there's a mix of probes and functions listed. There's also a difference when reading the file using dd with a block size of 1. This test performs the following: o Resets set_ftrace_filter o Makes sure only "#### all functions enabled ####" is listed (All checks uses cat, and dd with bs=1 and bs=100) o Adds a traceon trigger to schedule o Checks if only "#### all function enabled ####" and the trigger is there. o Adds tracing of schedule o Checks if only schedule and the trigger is there o Adds tracing of do_IRQ as well o Checks if only schedule, do_IRQ and the trigger is there o Adds a traceon trigger to do_IRQ o Checks if only schedule, do_IRQ and both triggers are there o Removes tracing of do_IRQ o Checks if only schedule and both triggers are there o Removes tracing of schedule o Checks if only "#### all functions enabled ####" and both triggers are there o Removes the triggers o Checks if only "#### all functions enabled ####" is there o Adds tracing of schedule o Checks if only schedule is there o Adds tracing of do_IRQ o Checks if only schedule and do_IRQ are there Signed-off-by: Steven Rostedt (VMware) --- diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc b/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc new file mode 100644 index 0000000..113b4d9 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc @@ -0,0 +1,132 @@ +#!/bin/sh +# description: ftrace - test reading of set_ftrace_filter +# +# The set_ftrace_filter file of ftrace is used to list functions as well as +# triggers (probes) attached to functions. The code to read this file is not +# straight forward and has had various bugs in the past. This test is designed +# to add functions and triggers to that file in various ways and read that +# file in various ways (cat vs dd). +# + +# The triggers are set within the set_ftrace_filter file +if [ ! -f set_ftrace_filter ]; then + echo "set_ftrace_filter not found? Is dynamic ftrace not set?" + exit_unsupported +fi + +do_reset() { + reset_tracer + reset_ftrace_filter + disable_events + clear_trace + enable_tracing +} + +fail() { # mesg + do_reset + echo $1 + exit $FAIL +} + +do_reset + +FILTER=set_ftrace_filter +FUNC1="schedule" +FUNC2="do_IRQ" + +ALL_FUNCS="#### all functions enabled ####" + +test_func() { + if ! echo "$1" | grep -q "^$2\$"; then + return 0 + fi + echo "$1" | grep -v "^$2\$" + return 1 +} + +check_set_ftrace_filter() { + cat=`cat $FILTER` + dd1=`dd if=$FILTER bs=1 | grep -v -e 'records in' -e 'records out' -e 'bytes copied'` + dd100=`dd if=$FILTER bs=100 | grep -v -e 'records in' -e 'records out' -e 'bytes copied'` + + echo "Testing '$@'" + + while [ $# -gt 0 ]; do + echo "test $1" + if cat=`test_func "$cat" "$1"`; then + return 0 + fi + if dd1=`test_func "$dd1" "$1"`; then + return 0 + fi + if dd100=`test_func "$dd100" "$1"`; then + return 0 + fi + shift + done + + if [ -n "$cat" ]; then + return 0 + fi + if [ -n "$dd1" ]; then + return 0 + fi + if [ -n "$dd100" ]; then + return 0 + fi + return 1; +} + +if check_set_ftrace_filter "$ALL_FUNCS"; then + fail "Expected only $ALL_FUNCS" +fi + +echo "$FUNC1:traceoff" > set_ftrace_filter +if check_set_ftrace_filter "$ALL_FUNCS" "$FUNC1:traceoff:unlimited"; then + fail "Expected $ALL_FUNCS and $FUNC1:traceoff:unlimited" +fi + +echo "$FUNC1" > set_ftrace_filter +if check_set_ftrace_filter "$FUNC1" "$FUNC1:traceoff:unlimited"; then + fail "Expected $FUNC1 and $FUNC1:traceoff:unlimited" +fi + +echo "$FUNC2" >> set_ftrace_filter +if check_set_ftrace_filter "$FUNC1" "$FUNC2" "$FUNC1:traceoff:unlimited"; then + fail "Expected $FUNC1 $FUNC2 and $FUNC1:traceoff:unlimited" +fi + +echo "$FUNC2:traceoff" >> set_ftrace_filter +if check_set_ftrace_filter "$FUNC1" "$FUNC2" "$FUNC1:traceoff:unlimited" "$FUNC2:traceoff:unlimited"; then + fail "Expected $FUNC1 $FUNC2 $FUNC1:traceoff:unlimited and $FUNC2:traceoff:unlimited" +fi + +echo "$FUNC1" > set_ftrace_filter +if check_set_ftrace_filter "$FUNC1" "$FUNC1:traceoff:unlimited" "$FUNC2:traceoff:unlimited"; then + fail "Expected $FUNC1 $FUNC1:traceoff:unlimited and $FUNC2:traceoff:unlimited" +fi + +echo > set_ftrace_filter +if check_set_ftrace_filter "$ALL_FUNCS" "$FUNC1:traceoff:unlimited" "$FUNC2:traceoff:unlimited"; then + fail "Expected $ALL_FUNCS $FUNC1:traceoff:unlimited and $FUNC2:traceoff:unlimited" +fi + +reset_ftrace_filter + +if check_set_ftrace_filter "$ALL_FUNCS"; then + fail "Expected $ALL_FUNCS" +fi + +echo "$FUNC1" > set_ftrace_filter +if check_set_ftrace_filter "$FUNC1" ; then + fail "Expected $FUNC1" +fi + +echo "$FUNC2" >> set_ftrace_filter +if check_set_ftrace_filter "$FUNC1" "$FUNC2" ; then + fail "Expected $FUNC1 and $FUNC2" +fi + +do_reset + +exit 0