#!/bin/bash
#
# Copyright (C) - 2016 Julien Desfossez <jdesfossez@efficios.com>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License, version 2 only, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 51
# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

TEST_DESC="Perf counters"

CURDIR=$(dirname $0)/
TESTDIR=$CURDIR/..
LTTNG_BIN="lttng"
SESSION_NAME="perf_counters"
NUM_TESTS=21
NR_ITER=1
NR_USEC_WAIT=1
TESTAPP_PATH="$TESTDIR/utils/testapp"
TESTAPP_NAME="gen-ust-events"
TESTAPP_BIN="$TESTAPP_PATH/$TESTAPP_NAME/$TESTAPP_NAME"
# Empty if libpfm is installed, "#" otherwise
HAVE_LIBPFM="@LTTNG_TOOLS_BUILD_WITH_LIBPFM_TRUE@"

source $TESTDIR/utils/utils.sh

function enable_ust_lttng_event_per_chan()
{
	sess_name="$1"
	event_name="$2"
	chan_name="$3"

	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" -s $sess_name -c $chan_name -u >/dev/null 2>&1
	ok $? "Enable event $event_name for session $sess_name in channel $chan_name"
}

function have_libpfm()
{
	test -z $HAVE_LIBPFM
	ok $? "Have libpfm installed"
}

function test_ust_raw()
{
	TRACE_PATH=$(mktemp -d)
	SESSION_NAME="ust_perf"
	CHAN_NAME="mychan"
	EVENT_NAME="tp:tptest"
	PMU="UNHALTED_REFERENCE_CYCLES"
	PERFID=$($CURDIR/find_event $PMU)
	test $? -eq "0"
	ok $? "Find PMU $PMU"

	create_lttng_session_ok $SESSION_NAME $TRACE_PATH

	enable_ust_lttng_channel_ok $SESSION_NAME $CHAN_NAME

	enable_ust_lttng_event_per_chan $SESSION_NAME $EVENT_NAME $CHAN_NAME

	add_context_ust_ok $SESSION_NAME $CHAN_NAME "perf:thread:raw:${PERFID}:test"

	start_lttng_tracing_ok

	$TESTAPP_BIN $NR_ITER $NR_USEC_WAIT >/dev/null 2>&1

	stop_lttng_tracing_ok

	destroy_lttng_session_ok $SESSION_NAME

	validate_trace "perf_thread_raw_${PERFID}_test" $TRACE_PATH

	rm -rf $TRACE_PATH
}

function test_kernel_raw()
{
	TRACE_PATH=$(mktemp -d)
	SESSION_NAME="kernel_perf"
	CHAN_NAME="mychan"
	EVENT_NAME="lttng_test_filter_event"
	PMU="UNHALTED_REFERENCE_CYCLES"
	PERFID=$($CURDIR/find_event $PMU)
	test $? -eq "0"
	ok $? "Find PMU $PMU"

	create_lttng_session_ok $SESSION_NAME $TRACE_PATH

	lttng_enable_kernel_channel_ok $SESSION_NAME $CHAN_NAME

	enable_kernel_lttng_event_ok $SESSION_NAME $EVENT_NAME $CHAN_NAME

	add_context_kernel_ok $SESSION_NAME $CHAN_NAME "perf:cpu:raw:${PERFID}:test"

	start_lttng_tracing_ok

	echo -n 10 > /proc/lttng-test-filter-event

	stop_lttng_tracing_ok

	destroy_lttng_session_ok $SESSION_NAME

	validate_trace "perf_cpu_raw_${PERFID}_test" $TRACE_PATH

	rm -rf $TRACE_PATH
}

if [ "$(id -u)" == "0" ]; then
	isroot=1
else
	isroot=0
fi

# MUST set TESTDIR before calling those functions
plan_tests $NUM_TESTS

print_test_banner "$TEST_DESC"

start_lttng_sessiond

have_libpfm

test_ust_raw

skip $isroot "Root access is needed for kernel testing, skipping." 9 ||
{
	modprobe lttng-test
	test_kernel_raw
	rmmod lttng-test
}

stop_lttng_sessiond