diff options
Diffstat (limited to 'kernel/tools/testing/selftests/ftrace')
26 files changed, 945 insertions, 0 deletions
diff --git a/kernel/tools/testing/selftests/ftrace/Makefile b/kernel/tools/testing/selftests/ftrace/Makefile new file mode 100644 index 000000000..346720639 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/Makefile @@ -0,0 +1,8 @@ +all: + +TEST_PROGS := ftracetest + +include ../lib.mk + +clean: + rm -rf logs/* diff --git a/kernel/tools/testing/selftests/ftrace/README b/kernel/tools/testing/selftests/ftrace/README new file mode 100644 index 000000000..182e76fa4 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/README @@ -0,0 +1,82 @@ +Linux Ftrace Testcases + +This is a collection of testcases for ftrace tracing feature in the Linux +kernel. Since ftrace exports interfaces via the debugfs, we just need +shell scripts for testing. Feel free to add new test cases. + +Running the ftrace testcases +============================ + +At first, you need to be the root user to run this script. +To run all testcases: + + $ sudo ./ftracetest + +To run specific testcases: + + # ./ftracetest test.d/basic3.tc + +Or you can also run testcases under given directory: + + # ./ftracetest test.d/kprobe/ + +Contributing new testcases +========================== + +Copy test.d/template to your testcase (whose filename must have *.tc +extension) and rewrite the test description line. + + * The working directory of the script is <debugfs>/tracing/. + + * Take care with side effects as the tests are run with root privilege. + + * The tests should not run for a long period of time (more than 1 min.) + These are to be unit tests. + + * You can add a directory for your testcases under test.d/ if needed. + + * The test cases should run on dash (busybox shell) for testing on + minimal cross-build environments. + + * Note that the tests are run with "set -e" (errexit) option. If any + command fails, the test will be terminated immediately. + + * The tests can return some result codes instead of pass or fail by + using exit_unresolved, exit_untested, exit_unsupported and exit_xfail. + +Result code +=========== + +Ftracetest supports following result codes. + + * PASS: The test succeeded as expected. The test which exits with 0 is + counted as passed test. + + * FAIL: The test failed, but was expected to succeed. The test which exits + with !0 is counted as failed test. + + * UNRESOLVED: The test produced unclear or intermidiate results. + for example, the test was interrupted + or the test depends on a previous test, which failed. + or the test was set up incorrectly + The test which is in above situation, must call exit_unresolved. + + * UNTESTED: The test was not run, currently just a placeholder. + In this case, the test must call exit_untested. + + * UNSUPPORTED: The test failed because of lack of feature. + In this case, the test must call exit_unsupported. + + * XFAIL: The test failed, and was expected to fail. + To return XFAIL, call exit_xfail from the test. + +There are some sample test scripts for result code under samples/. +You can also run samples as below: + + # ./ftracetest samples/ + +TODO +==== + + * Fancy colored output :) + diff --git a/kernel/tools/testing/selftests/ftrace/ftracetest b/kernel/tools/testing/selftests/ftrace/ftracetest new file mode 100755 index 000000000..da48812ab --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/ftracetest @@ -0,0 +1,270 @@ +#!/bin/sh + +# ftracetest - Ftrace test shell scripts +# +# Copyright (C) Hitachi Ltd., 2014 +# Written by Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> +# +# Released under the terms of the GPL v2. + +usage() { # errno [message] +[ "$2" ] && echo $2 +echo "Usage: ftracetest [options] [testcase(s)] [testcase-directory(s)]" +echo " Options:" +echo " -h|--help Show help message" +echo " -k|--keep Keep passed test logs" +echo " -v|--verbose Show all stdout messages in testcases" +echo " -d|--debug Debug mode (trace all shell commands)" +exit $1 +} + +errexit() { # message + echo "Error: $1" 1>&2 + exit 1 +} + +# Ensuring user privilege +if [ `id -u` -ne 0 ]; then + errexit "this must be run by root user" +fi + +# Utilities +absdir() { # file_path + (cd `dirname $1`; pwd) +} + +abspath() { + echo `absdir $1`/`basename $1` +} + +find_testcases() { #directory + echo `find $1 -name \*.tc | sort` +} + +parse_opts() { # opts + local OPT_TEST_CASES= + local OPT_TEST_DIR= + + while [ "$1" ]; do + case "$1" in + --help|-h) + usage 0 + ;; + --keep|-k) + KEEP_LOG=1 + shift 1 + ;; + --verbose|-v) + VERBOSE=1 + shift 1 + ;; + --debug|-d) + DEBUG=1 + shift 1 + ;; + *.tc) + if [ -f "$1" ]; then + OPT_TEST_CASES="$OPT_TEST_CASES `abspath $1`" + shift 1 + else + usage 1 "$1 is not a testcase" + fi + ;; + *) + if [ -d "$1" ]; then + OPT_TEST_DIR=`abspath $1` + OPT_TEST_CASES="$OPT_TEST_CASES `find_testcases $OPT_TEST_DIR`" + shift 1 + else + usage 1 "Invalid option ($1)" + fi + ;; + esac + done + if [ "$OPT_TEST_CASES" ]; then + TEST_CASES=$OPT_TEST_CASES + fi +} + +# Parameters +DEBUGFS_DIR=`grep debugfs /proc/mounts | cut -f2 -d' ' | head -1` +TRACING_DIR=$DEBUGFS_DIR/tracing +TOP_DIR=`absdir $0` +TEST_DIR=$TOP_DIR/test.d +TEST_CASES=`find_testcases $TEST_DIR` +LOG_DIR=$TOP_DIR/logs/`date +%Y%m%d-%H%M%S`/ +KEEP_LOG=0 +DEBUG=0 +VERBOSE=0 +# Parse command-line options +parse_opts $* + +[ $DEBUG -ne 0 ] && set -x + +# Verify parameters +if [ -z "$DEBUGFS_DIR" -o ! -d "$TRACING_DIR" ]; then + errexit "No ftrace directory found" +fi + +# Preparing logs +LOG_FILE=$LOG_DIR/ftracetest.log +mkdir -p $LOG_DIR || errexit "Failed to make a log directory: $LOG_DIR" +date > $LOG_FILE +prlog() { # messages + echo "$@" | tee -a $LOG_FILE +} +catlog() { #file + cat $1 | tee -a $LOG_FILE +} +prlog "=== Ftrace unit tests ===" + + +# Testcase management +# Test result codes - Dejagnu extended code +PASS=0 # The test succeeded. +FAIL=1 # The test failed, but was expected to succeed. +UNRESOLVED=2 # The test produced indeterminate results. (e.g. interrupted) +UNTESTED=3 # The test was not run, currently just a placeholder. +UNSUPPORTED=4 # The test failed because of lack of feature. +XFAIL=5 # The test failed, and was expected to fail. + +# Accumulations +PASSED_CASES= +FAILED_CASES= +UNRESOLVED_CASES= +UNTESTED_CASES= +UNSUPPORTED_CASES= +XFAILED_CASES= +UNDEFINED_CASES= +TOTAL_RESULT=0 + +CASENO=0 +testcase() { # testfile + CASENO=$((CASENO+1)) + desc=`grep "^#[ \t]*description:" $1 | cut -f2 -d:` + prlog -n "[$CASENO]$desc" +} + +eval_result() { # sigval + case $1 in + $PASS) + prlog " [PASS]" + PASSED_CASES="$PASSED_CASES $CASENO" + return 0 + ;; + $FAIL) + prlog " [FAIL]" + FAILED_CASES="$FAILED_CASES $CASENO" + return 1 # this is a bug. + ;; + $UNRESOLVED) + prlog " [UNRESOLVED]" + UNRESOLVED_CASES="$UNRESOLVED_CASES $CASENO" + return 1 # this is a kind of bug.. something happened. + ;; + $UNTESTED) + prlog " [UNTESTED]" + UNTESTED_CASES="$UNTESTED_CASES $CASENO" + return 0 + ;; + $UNSUPPORTED) + prlog " [UNSUPPORTED]" + UNSUPPORTED_CASES="$UNSUPPORTED_CASES $CASENO" + return 1 # this is not a bug, but the result should be reported. + ;; + $XFAIL) + prlog " [XFAIL]" + XFAILED_CASES="$XFAILED_CASES $CASENO" + return 0 + ;; + *) + prlog " [UNDEFINED]" + UNDEFINED_CASES="$UNDEFINED_CASES $CASENO" + return 1 # this must be a test bug + ;; + esac +} + +# Signal handling for result codes +SIG_RESULT= +SIG_BASE=36 # Use realtime signals +SIG_PID=$$ + +SIG_FAIL=$((SIG_BASE + FAIL)) +trap 'SIG_RESULT=$FAIL' $SIG_FAIL + +SIG_UNRESOLVED=$((SIG_BASE + UNRESOLVED)) +exit_unresolved () { + kill -s $SIG_UNRESOLVED $SIG_PID + exit 0 +} +trap 'SIG_RESULT=$UNRESOLVED' $SIG_UNRESOLVED + +SIG_UNTESTED=$((SIG_BASE + UNTESTED)) +exit_untested () { + kill -s $SIG_UNTESTED $SIG_PID + exit 0 +} +trap 'SIG_RESULT=$UNTESTED' $SIG_UNTESTED + +SIG_UNSUPPORTED=$((SIG_BASE + UNSUPPORTED)) +exit_unsupported () { + kill -s $SIG_UNSUPPORTED $SIG_PID + exit 0 +} +trap 'SIG_RESULT=$UNSUPPORTED' $SIG_UNSUPPORTED + +SIG_XFAIL=$((SIG_BASE + XFAIL)) +exit_xfail () { + kill -s $SIG_XFAIL $SIG_PID + exit 0 +} +trap 'SIG_RESULT=$XFAIL' $SIG_XFAIL + +__run_test() { # testfile + # setup PID and PPID, $$ is not updated. + (cd $TRACING_DIR; read PID _ < /proc/self/stat ; set -e; set -x; . $1) + [ $? -ne 0 ] && kill -s $SIG_FAIL $SIG_PID +} + +# Run one test case +run_test() { # testfile + local testname=`basename $1` + local testlog=`mktemp $LOG_DIR/${testname}-log.XXXXXX` + testcase $1 + echo "execute: "$1 > $testlog + SIG_RESULT=0 + if [ $VERBOSE -ne 0 ]; then + __run_test $1 2>> $testlog | tee -a $testlog + else + __run_test $1 >> $testlog 2>&1 + fi + eval_result $SIG_RESULT + if [ $? -eq 0 ]; then + # Remove test log if the test was done as it was expected. + [ $KEEP_LOG -eq 0 ] && rm $testlog + else + catlog $testlog + TOTAL_RESULT=1 + fi +} + +# load in the helper functions +. $TEST_DIR/functions + +# Main loop +for t in $TEST_CASES; do + run_test $t +done + +prlog "" +prlog "# of passed: " `echo $PASSED_CASES | wc -w` +prlog "# of failed: " `echo $FAILED_CASES | wc -w` +prlog "# of unresolved: " `echo $UNRESOLVED_CASES | wc -w` +prlog "# of untested: " `echo $UNTESTED_CASES | wc -w` +prlog "# of unsupported: " `echo $UNSUPPORTED_CASES | wc -w` +prlog "# of xfailed: " `echo $XFAILED_CASES | wc -w` +prlog "# of undefined(test bug): " `echo $UNDEFINED_CASES | wc -w` + +# if no error, return 0 +exit $TOTAL_RESULT diff --git a/kernel/tools/testing/selftests/ftrace/samples/fail.tc b/kernel/tools/testing/selftests/ftrace/samples/fail.tc new file mode 100644 index 000000000..15e35b956 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/samples/fail.tc @@ -0,0 +1,4 @@ +#!/bin/sh +# description: failure-case example +cat non-exist-file +echo "this is not executed" diff --git a/kernel/tools/testing/selftests/ftrace/samples/pass.tc b/kernel/tools/testing/selftests/ftrace/samples/pass.tc new file mode 100644 index 000000000..d01549370 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/samples/pass.tc @@ -0,0 +1,3 @@ +#!/bin/sh +# description: pass-case example +return 0 diff --git a/kernel/tools/testing/selftests/ftrace/samples/unresolved.tc b/kernel/tools/testing/selftests/ftrace/samples/unresolved.tc new file mode 100644 index 000000000..41e99d335 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/samples/unresolved.tc @@ -0,0 +1,4 @@ +#!/bin/sh +# description: unresolved-case example +trap exit_unresolved INT +kill -INT $PID diff --git a/kernel/tools/testing/selftests/ftrace/samples/unsupported.tc b/kernel/tools/testing/selftests/ftrace/samples/unsupported.tc new file mode 100644 index 000000000..45910ff13 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/samples/unsupported.tc @@ -0,0 +1,3 @@ +#!/bin/sh +# description: unsupported-case example +exit_unsupported diff --git a/kernel/tools/testing/selftests/ftrace/samples/untested.tc b/kernel/tools/testing/selftests/ftrace/samples/untested.tc new file mode 100644 index 000000000..35a45946e --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/samples/untested.tc @@ -0,0 +1,3 @@ +#!/bin/sh +# description: untested-case example +exit_untested diff --git a/kernel/tools/testing/selftests/ftrace/samples/xfail.tc b/kernel/tools/testing/selftests/ftrace/samples/xfail.tc new file mode 100644 index 000000000..9dd395323 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/samples/xfail.tc @@ -0,0 +1,3 @@ +#!/bin/sh +# description: xfail-case example +cat non-exist-file || exit_xfail diff --git a/kernel/tools/testing/selftests/ftrace/test.d/00basic/basic1.tc b/kernel/tools/testing/selftests/ftrace/test.d/00basic/basic1.tc new file mode 100644 index 000000000..9980ff14a --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/00basic/basic1.tc @@ -0,0 +1,3 @@ +#!/bin/sh +# description: Basic trace file check +test -f README -a -f trace -a -f tracing_on -a -f trace_pipe diff --git a/kernel/tools/testing/selftests/ftrace/test.d/00basic/basic2.tc b/kernel/tools/testing/selftests/ftrace/test.d/00basic/basic2.tc new file mode 100644 index 000000000..bf9a7b037 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/00basic/basic2.tc @@ -0,0 +1,7 @@ +#!/bin/sh +# description: Basic test for tracers +test -f available_tracers +for t in `cat available_tracers`; do + echo $t > current_tracer +done +echo nop > current_tracer diff --git a/kernel/tools/testing/selftests/ftrace/test.d/00basic/basic3.tc b/kernel/tools/testing/selftests/ftrace/test.d/00basic/basic3.tc new file mode 100644 index 000000000..bde6625d9 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/00basic/basic3.tc @@ -0,0 +1,8 @@ +#!/bin/sh +# description: Basic trace clock test +test -f trace_clock +for c in `cat trace_clock | tr -d \[\]`; do + echo $c > trace_clock + grep '\['$c'\]' trace_clock +done +echo local > trace_clock diff --git a/kernel/tools/testing/selftests/ftrace/test.d/00basic/basic4.tc b/kernel/tools/testing/selftests/ftrace/test.d/00basic/basic4.tc new file mode 100644 index 000000000..aa51f6c17 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/00basic/basic4.tc @@ -0,0 +1,5 @@ +#!/bin/sh +# description: Basic event tracing check +test -f available_events -a -f set_event -a -d events +# check scheduler events are available +grep -q sched available_events && exit 0 || exit $FAIL diff --git a/kernel/tools/testing/selftests/ftrace/test.d/event/event-enable.tc b/kernel/tools/testing/selftests/ftrace/test.d/event/event-enable.tc new file mode 100644 index 000000000..87eb9d6dd --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/event/event-enable.tc @@ -0,0 +1,60 @@ +#!/bin/sh +# description: event tracing - enable/disable with event level files + +do_reset() { + echo > set_event + clear_trace +} + +fail() { #msg + do_reset + echo $1 + exit $FAIL +} + +yield() { + ping localhost -c 1 || sleep .001 || usleep 1 || sleep 1 +} + +if [ ! -f set_event -o ! -d events/sched ]; then + echo "event tracing is not supported" + exit_unsupported +fi + +reset_tracer +do_reset + +echo 'sched:sched_switch' > set_event + +yield + +count=`cat trace | grep sched_switch | wc -l` +if [ $count -eq 0 ]; then + fail "sched_switch events are not recorded" +fi + +do_reset + +echo 1 > events/sched/sched_switch/enable + +yield + +count=`cat trace | grep sched_switch | wc -l` +if [ $count -eq 0 ]; then + fail "sched_switch events are not recorded" +fi + +do_reset + +echo 0 > events/sched/sched_switch/enable + +yield + +count=`cat trace | grep sched_switch | wc -l` +if [ $count -ne 0 ]; then + fail "sched_switch events should not be recorded" +fi + +do_reset + +exit 0 diff --git a/kernel/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc b/kernel/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc new file mode 100644 index 000000000..ced27ef06 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc @@ -0,0 +1,60 @@ +#!/bin/sh +# description: event tracing - enable/disable with subsystem level files + +do_reset() { + echo > set_event + clear_trace +} + +fail() { #msg + do_reset + echo $1 + exit $FAIL +} + +yield() { + ping localhost -c 1 || sleep .001 || usleep 1 || sleep 1 +} + +if [ ! -f set_event -o ! -d events/sched ]; then + echo "event tracing is not supported" + exit_unsupported +fi + +reset_tracer +do_reset + +echo 'sched:*' > set_event + +yield + +count=`cat trace | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l` +if [ $count -lt 3 ]; then + fail "at least fork, exec and exit events should be recorded" +fi + +do_reset + +echo 1 > events/sched/enable + +yield + +count=`cat trace | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l` +if [ $count -lt 3 ]; then + fail "at least fork, exec and exit events should be recorded" +fi + +do_reset + +echo 0 > events/sched/enable + +yield + +count=`cat trace | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l` +if [ $count -ne 0 ]; then + fail "any of scheduler events should not be recorded" +fi + +do_reset + +exit 0 diff --git a/kernel/tools/testing/selftests/ftrace/test.d/event/toplevel-enable.tc b/kernel/tools/testing/selftests/ftrace/test.d/event/toplevel-enable.tc new file mode 100644 index 000000000..0bb5df3c0 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/event/toplevel-enable.tc @@ -0,0 +1,60 @@ +#!/bin/sh +# description: event tracing - enable/disable with top level files + +do_reset() { + echo > set_event + clear_trace +} + +fail() { #msg + do_reset + echo $1 + exit $FAIL +} + +yield() { + ping localhost -c 1 || sleep .001 || usleep 1 || sleep 1 +} + +if [ ! -f available_events -o ! -f set_event -o ! -d events ]; then + echo "event tracing is not supported" + exit_unsupported +fi + +reset_tracer +do_reset + +echo '*:*' > set_event + +yield + +count=`cat trace | grep -v ^# | wc -l` +if [ $count -eq 0 ]; then + fail "none of events are recorded" +fi + +do_reset + +echo 1 > events/enable + +yield + +count=`cat trace | grep -v ^# | wc -l` +if [ $count -eq 0 ]; then + fail "none of events are recorded" +fi + +do_reset + +echo 0 > events/enable + +yield + +count=`cat trace | grep -v ^# | wc -l` +if [ $count -ne 0 ]; then + fail "any of events should not be recorded" +fi + +do_reset + +exit 0 diff --git a/kernel/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-filter-stack.tc b/kernel/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-filter-stack.tc new file mode 100644 index 000000000..15c2dba06 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-filter-stack.tc @@ -0,0 +1,91 @@ +#!/bin/sh +# description: ftrace - function graph filters with stack tracer + +# Make sure that function graph filtering works, and is not +# affected by other tracers enabled (like stack tracer) + +if ! grep -q function_graph available_tracers; then + echo "no function graph tracer configured" + exit_unsupported +fi + +if [ ! -f set_ftrace_filter ]; then + echo "set_ftrace_filter not found? Is dynamic ftrace not set?" + exit_unsupported +fi + +do_reset() { + reset_tracer + if [ -e /proc/sys/kernel/stack_tracer_enabled ]; then + echo 0 > /proc/sys/kernel/stack_tracer_enabled + fi + enable_tracing + clear_trace + echo > set_ftrace_filter +} + +fail() { # msg + do_reset + echo $1 + exit $FAIL +} + +disable_tracing +clear_trace; + +# filter something, schedule is always good +if ! echo "schedule" > set_ftrace_filter; then + # test for powerpc 64 + if ! echo ".schedule" > set_ftrace_filter; then + fail "can not enable schedule filter" + fi +fi + +echo function_graph > current_tracer + +if [ ! -f stack_trace ]; then + echo "Stack tracer not configured" + do_reset + exit_unsupported; +fi + +echo "Now testing with stack tracer" + +echo 1 > /proc/sys/kernel/stack_tracer_enabled + +disable_tracing +clear_trace +enable_tracing +sleep 1 + +count=`cat trace | grep '()' | grep -v schedule | wc -l` + +if [ $count -ne 0 ]; then + fail "Graph filtering not working with stack tracer?" +fi + +# Make sure we did find something +count=`cat trace | grep 'schedule()' | wc -l` +if [ $count -eq 0 ]; then + fail "No schedule traces found?" +fi + +echo 0 > /proc/sys/kernel/stack_tracer_enabled +clear_trace +sleep 1 + + +count=`cat trace | grep '()' | grep -v schedule | wc -l` + +if [ $count -ne 0 ]; then + fail "Graph filtering not working after stack tracer disabled?" +fi + +count=`cat trace | grep 'schedule()' | wc -l` +if [ $count -eq 0 ]; then + fail "No schedule traces found?" +fi + +do_reset + +exit 0 diff --git a/kernel/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-filter.tc b/kernel/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-filter.tc new file mode 100644 index 000000000..0ab218961 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-filter.tc @@ -0,0 +1,52 @@ +#!/bin/sh +# description: ftrace - function graph filters + +# Make sure that function graph filtering works + +if ! grep -q function_graph available_tracers; then + echo "no function graph tracer configured" + exit_unsupported +fi + +do_reset() { + reset_tracer + enable_tracing + clear_trace +} + +fail() { # msg + do_reset + echo $1 + exit $FAIL +} + +disable_tracing +clear_trace + +# filter something, schedule is always good +if ! echo "schedule" > set_ftrace_filter; then + # test for powerpc 64 + if ! echo ".schedule" > set_ftrace_filter; then + fail "can not enable schedule filter" + fi +fi + +echo function_graph > current_tracer +enable_tracing +sleep 1 +# search for functions (has "()" on the line), and make sure +# that only the schedule function was found +count=`cat trace | grep '()' | grep -v schedule | wc -l` +if [ $count -ne 0 ]; then + fail "Graph filtering not working by itself?" +fi + +# Make sure we did find something +count=`cat trace | grep 'schedule()' | wc -l` +if [ $count -eq 0 ]; then + fail "No schedule traces found?" +fi + +do_reset + +exit 0 diff --git a/kernel/tools/testing/selftests/ftrace/test.d/ftrace/func_profiler.tc b/kernel/tools/testing/selftests/ftrace/test.d/ftrace/func_profiler.tc new file mode 100644 index 000000000..7808336d6 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/ftrace/func_profiler.tc @@ -0,0 +1,80 @@ +#!/bin/sh +# description: ftrace - function profiler with function tracing + +# There was a bug after a rewrite of the ftrace infrastructure that +# caused the function_profiler not to be able to run with the function +# tracer, because the function_profiler used the function_graph tracer +# and it was assumed the two could not run simultaneously. +# +# There was another related bug where the solution to the first bug +# broke the way filtering of the function tracer worked. +# +# This test triggers those bugs on those kernels. +# +# We need function_graph and profiling to to run this test +if ! grep -q function_graph available_tracers; then + echo "no function graph tracer configured" + exit_unsupported; +fi + +if [ ! -f set_ftrace_filter ]; then + echo "set_ftrace_filter not found? Is dynamic ftrace not set?" + exit_unsupported +fi + +if [ ! -f function_profile_enabled ]; then + echo "function_profile_enabled not found, function profiling enabled?" + exit_unsupported +fi + +fail() { # mesg + reset_tracer + echo > set_ftrace_filter + echo $1 + exit $FAIL +} + +echo "Testing function tracer with profiler:" +echo "enable function tracer" +echo function > current_tracer +echo "enable profiler" +echo 1 > function_profile_enabled + +sleep 1 + +echo "Now filter on just schedule" +echo '*schedule' > set_ftrace_filter +clear_trace + +echo "Now disable function profiler" +echo 0 > function_profile_enabled + +sleep 1 + +# make sure only schedule functions exist + +echo "testing if only schedule is being traced" +if grep -v -e '^#' -e 'schedule' trace; then + fail "more than schedule was found" +fi + +echo "Make sure schedule was traced" +if ! grep -e 'schedule' trace > /dev/null; then + cat trace + fail "can not find schedule in trace" +fi + +echo > set_ftrace_filter +clear_trace + +sleep 1 + +echo "make sure something other than scheduler is being traced" +if ! grep -v -e '^#' -e 'schedule' trace > /dev/null; then + cat trace + fail "no other functions besides schedule was found" +fi + +reset_tracer + +exit 0 diff --git a/kernel/tools/testing/selftests/ftrace/test.d/functions b/kernel/tools/testing/selftests/ftrace/test.d/functions new file mode 100644 index 000000000..5d8cd06d9 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/functions @@ -0,0 +1,16 @@ + +clear_trace() { # reset trace output + echo > trace +} + +disable_tracing() { # stop trace recording + echo 0 > tracing_on +} + +enable_tracing() { # start trace recording + echo 1 > tracing_on +} + +reset_tracer() { # reset the current tracer + echo nop > current_tracer +} diff --git a/kernel/tools/testing/selftests/ftrace/test.d/kprobe/add_and_remove.tc b/kernel/tools/testing/selftests/ftrace/test.d/kprobe/add_and_remove.tc new file mode 100644 index 000000000..a5a426211 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/kprobe/add_and_remove.tc @@ -0,0 +1,12 @@ +#!/bin/sh +# description: Kprobe dynamic event - adding and removing + +[ -f kprobe_events ] || exit_unsupported # this is configurable + +echo 0 > events/enable +echo > kprobe_events +echo p:myevent do_fork > kprobe_events +grep myevent kprobe_events +test -d events/kprobes/myevent +echo > kprobe_events +clear_trace diff --git a/kernel/tools/testing/selftests/ftrace/test.d/kprobe/busy_check.tc b/kernel/tools/testing/selftests/ftrace/test.d/kprobe/busy_check.tc new file mode 100644 index 000000000..d8c7bb658 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/kprobe/busy_check.tc @@ -0,0 +1,14 @@ +#!/bin/sh +# description: Kprobe dynamic event - busy event check + +[ -f kprobe_events ] || exit_unsupported + +echo 0 > events/enable +echo > kprobe_events +echo p:myevent do_fork > kprobe_events +test -d events/kprobes/myevent +echo 1 > events/kprobes/myevent/enable +echo > kprobe_events && exit 1 # this must fail +echo 0 > events/kprobes/myevent/enable +echo > kprobe_events # this must succeed +clear_trace diff --git a/kernel/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args.tc b/kernel/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args.tc new file mode 100644 index 000000000..c45ee2761 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args.tc @@ -0,0 +1,17 @@ +#!/bin/sh +# description: Kprobe dynamic event with arguments + +[ -f kprobe_events ] || exit_unsupported # this is configurable + +echo 0 > events/enable +echo > kprobe_events +echo 'p:testprobe do_fork $stack $stack0 +0($stack)' > kprobe_events +grep testprobe kprobe_events +test -d events/kprobes/testprobe +echo 1 > events/kprobes/testprobe/enable +( echo "forked") +echo 0 > events/kprobes/testprobe/enable +echo "-:testprobe" >> kprobe_events +clear_trace +test -d events/kprobes/testprobe && exit 1 || exit 0 + diff --git a/kernel/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_ftrace.tc b/kernel/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_ftrace.tc new file mode 100644 index 000000000..ab41d2b29 --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_ftrace.tc @@ -0,0 +1,55 @@ +#!/bin/sh +# description: Kprobe dynamic event with function tracer + +[ -f kprobe_events ] || exit_unsupported # this is configurable +grep function available_tracers || exit_unsupported # this is configurable + +# prepare +echo nop > current_tracer +echo do_fork > set_ftrace_filter +echo 0 > events/enable +echo > kprobe_events +echo 'p:testprobe do_fork' > kprobe_events + +# kprobe on / ftrace off +echo 1 > events/kprobes/testprobe/enable +echo > trace +( echo "forked") +grep testprobe trace +! grep 'do_fork <-' trace + +# kprobe on / ftrace on +echo function > current_tracer +echo > trace +( echo "forked") +grep testprobe trace +grep 'do_fork <-' trace + +# kprobe off / ftrace on +echo 0 > events/kprobes/testprobe/enable +echo > trace +( echo "forked") +! grep testprobe trace +grep 'do_fork <-' trace + +# kprobe on / ftrace on +echo 1 > events/kprobes/testprobe/enable +echo function > current_tracer +echo > trace +( echo "forked") +grep testprobe trace +grep 'do_fork <-' trace + +# kprobe on / ftrace off +echo nop > current_tracer +echo > trace +( echo "forked") +grep testprobe trace +! grep 'do_fork <-' trace + +# cleanup +echo nop > current_tracer +echo > set_ftrace_filter +echo 0 > events/kprobes/testprobe/enable +echo > kprobe_events +echo > trace diff --git a/kernel/tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_args.tc b/kernel/tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_args.tc new file mode 100644 index 000000000..31717985a --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_args.tc @@ -0,0 +1,16 @@ +#!/bin/sh +# description: Kretprobe dynamic event with arguments + +[ -f kprobe_events ] || exit_unsupported # this is configurable + +echo 0 > events/enable +echo > kprobe_events +echo 'r:testprobe2 do_fork $retval' > kprobe_events +grep testprobe2 kprobe_events +test -d events/kprobes/testprobe2 +echo 1 > events/kprobes/testprobe2/enable +( echo "forked") +echo 0 > events/kprobes/testprobe2/enable +echo '-:testprobe2' >> kprobe_events +clear_trace +test -d events/kprobes/testprobe2 && exit 1 || exit 0 diff --git a/kernel/tools/testing/selftests/ftrace/test.d/template b/kernel/tools/testing/selftests/ftrace/test.d/template new file mode 100644 index 000000000..5448f7aba --- /dev/null +++ b/kernel/tools/testing/selftests/ftrace/test.d/template @@ -0,0 +1,9 @@ +#!/bin/sh +# description: %HERE DESCRIBE WHAT THIS DOES% +# you have to add ".tc" extention for your testcase file +# Note that all tests are run with "errexit" option. + +exit 0 # Return 0 if the test is passed, otherwise return !0 +# If the test could not run because of lack of feature, call exit_unsupported +# If the test returned unclear results, call exit_unresolved +# If the test is a dummy, or a placeholder, call exit_untested |