#!/bin/bash
#
# Copyright (C) - 2020 EfficiOS, inc
#
# This library is free software; you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation; version 2.1 of the License.
#
# This library 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 Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA

# Test the `lttng add-trigger` command line interface.

CURDIR="$(dirname "$0")"
TESTDIR="$CURDIR/../../.."

# shellcheck source=../../../utils/utils.sh
source "$TESTDIR/utils/utils.sh"

plan_tests 228

FULL_LTTNG_BIN="${TESTDIR}/../src/bin/lttng/${LTTNG_BIN}"

# shellcheck disable=SC2119
start_lttng_sessiond_notap

tmp_stdout=$(mktemp -t test_parse_cli_trigger_stdout.XXXXXX)
tmp_stderr=$(mktemp -t test_parse_cli_trigger_stderr.XXXXXX)
uprobe_elf_binary="${TESTDIR}/utils/testapp/userspace-probe-elf-binary/.libs/userspace-probe-elf-binary"

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

function test_success ()
{
	local test_name="$1"
	shift

	diag "${FULL_LTTNG_BIN} add-trigger $*"
	set -x
	"${FULL_LTTNG_BIN}" add-trigger "$@" > "${tmp_stdout}" 2> "${tmp_stderr}"
	set +x
	ok $? "${test_name}: exit code is 0"

	diff -u "${tmp_stdout}" <(echo "Trigger registered successfully.")
	ok $? "${test_name}: expected stdout"

	diff -u "${tmp_stderr}" /dev/null
	ok $? "${test_name}: expected stderr"
}

function test_failure ()
{
	local test_name="$1"
	local error_msg="$2"

	shift 2

	diag "${FULL_LTTNG_BIN} add-trigger $*"
	"${FULL_LTTNG_BIN}" add-trigger "$@" > "${tmp_stdout}" 2> "${tmp_stderr}"
	isnt $? 0 "${test_name}: exit code is not 0"

	diff -u "${tmp_stdout}" /dev/null
	ok $? "${test_name}: expected stdout"

	diff -u "${tmp_stderr}" <(echo "${error_msg}")
	ok $? "${test_name}: expected stderr"
}

# top-level options
test_success "explicit name" \
	--name hohoho \
	--condition event-rule-matches --name=some-event-id --domain=user \
	--action notify

# `--condition event-rule-matches` successes
test_success "--condition event-rule-matches some-event --domain=user" \
	--condition event-rule-matches --name=some-event --domain=user \
	--action notify

test_success "--condition event-rule-matches --domain=user" \
	--condition event-rule-matches --domain=user \
	--action notify

test_success "notify action polices" \
	--condition event-rule-matches --domain=user --name=test-rate-policy \
	--action notify \
	--rate-policy=every:55 \
	--action notify \
	--rate-policy=once-after:55

test_success "start session action polices" \
	--condition event-rule-matches --domain=user --name=test-rate-policy \
	--action start-session my_session \
	--rate-policy=every:55 \
	--action start-session my_session \
	--rate-policy=once-after:55

test_success "stop session action polices" \
	--condition event-rule-matches --domain=user --name=test-rate-policy \
	--action stop-session my_session \
	--rate-policy=every:55 \
	--action stop-session my_session \
	--rate-policy=once-after:55

test_success "snapshot session action polices" \
	--condition event-rule-matches --domain=user --name=test-rate-policy \
	--action snapshot-session my_session \
	--rate-policy=every:55 \
	--action snapshot-session my_session \
	--rate-policy=once-after:55

test_success "rotate session action polices" \
	--condition event-rule-matches --domain=user --name=test-rate-policy \
	--action rotate-session my_session \
	--rate-policy=every:55 \
	--action rotate-session my_session \
	--rate-policy=once-after:55

skip $ist_root "non-root user: skipping kprobe tests" 9 || {
	test_success "--condition event-rule-matches probe by symbol" \
		--condition event-rule-matches --domain=kernel --probe=lttng_channel_enable --event-name=my_channel_enable \
		--action notify

	channel_enable_addr=$(grep ' t lttng_channel_enable\s\[lttng_tracer\]$' /proc/kallsyms | cut -f 1 -d ' ')
	channel_disable_addr=$(grep ' t lttng_channel_disable\s\[lttng_tracer\]$' /proc/kallsyms | cut -f 1 -d ' ')

	# We need to find a valid offset.
	base_symbol=""
	offset=0
	if [[ 0x$channel_enable_addr -lt 0x$channel_disable_addr ]]; then
		base_symbol="lttng_channel_enable"
		offset=$(( 0x$channel_disable_addr - 0x$channel_enable_addr ))
	else
		base_symbol="lttng_channel_disable"
		offset=$(( 0x$channel_enable_addr - 0x$channel_disable_addr ))
	fi

	offset_hex="0x$(printf '%x' $offset)"

	test_success "--condition event-rule-matches probe by symbol with offset" \
		--condition event-rule-matches --domain=kernel --probe="${base_symbol}+${offset_hex}" --event-name=my_$base_symbol \
		--action notify

	test_success "--condition event-rule-matches probe by address" \
		--condition event-rule-matches --domain=kernel "--probe=0x${channel_enable_addr}" --event-name=my_channel_enable \
		--action notify
}

skip $ist_root "non-root user: skipping uprobe tests" 6 || {
	test_success "--condition event-rule-matches uprobe" \
		--condition event-rule-matches --domain=kernel --userspace-probe=${uprobe_elf_binary}:test_function --event-name=ma-probe \
		--action notify

	test_success "--condition event-rule-matches uprobe with elf prefix" \
		--condition event-rule-matches --domain=kernel --userspace-probe=elf:${uprobe_elf_binary}:test_function --event-name=ma-probe-2 \
		--action notify
}

skip $ist_root "non-root user: skipping syscall tests" 9 || {
	test_success "--condition event-rule-matches one syscall" \
		--condition event-rule-matches --domain=kernel --syscall --name=open \
		--action notify

	test_success "--condition event-rule-matches all syscalls" \
		--condition event-rule-matches --domain=kernel --syscall \
		--action notify

	test_success "--condition event-rule-matches one syscall with filter" \
		--condition event-rule-matches --domain=kernel --syscall --filter 'a > 2' --name=open \
		--action notify
}

# `--action notify` successes
test_success "--action notify" \
	--condition event-rule-matches --domain=user \
	--action notify

test_success "--action notify --capture foo" \
	--condition event-rule-matches --domain=user \
	--capture foo --action notify

test_success "--action notify --capture foo[2]" \
	--condition event-rule-matches --domain=user \
	--capture 'foo[2]' --action notify

test_success '--action notify --capture $ctx.foo' \
	--condition event-rule-matches --domain=user \
	--capture '$ctx.foo' --action notify

test_success '--action notify --capture $ctx.foo[2]' \
	--condition event-rule-matches --domain=user \
	--capture '$ctx.foo[2]' --action notify

test_success '--action notify --capture $app.prov:type' \
	--condition event-rule-matches --domain=user \
	--capture '$app.prov:type' --action notify

test_success '--action notify --capture $app.prov:type[2]' \
	--condition event-rule-matches --domain=user \
	--capture '$app.prov:type[2]' --action notify

test_success '--action notify multiple captures' \
	--condition event-rule-matches --domain=user \
	--capture foo --capture '$app.hello:world' --action notify

# `--action start-session` successes
test_success "--action start-session" \
	--condition event-rule-matches --domain=user \
	--action start-session ze-session

# `--action stop-session` successes
test_success "--action stop-session foo" \
	--condition event-rule-matches --domain=user \
	--action stop-session ze-session

# `--action rotate-session` successes
test_success "--action rotate-session foo" \
	--condition event-rule-matches --domain=user \
	--action rotate-session ze-session

# `--action snapshot-session` successes
test_success "--action snapshot-session foo" \
	--condition event-rule-matches --domain=user \
	--action snapshot-session ze-session

test_success "--action snapshot-session with file URI" \
	--condition event-rule-matches --domain=user \
	--action snapshot-session ze-session --path /hello

test_success "--action snapshot-session with net URI" \
	--condition event-rule-matches --domain=user \
	--action snapshot-session ze-session --url net://1.2.3.4

test_success "--action snapshot-session with ctrl/data URIs" \
	--condition event-rule-matches --domain=user \
	--action snapshot-session ze-session --ctrl-url=tcp://1.2.3.4:1234 --data-url=tcp://1.2.3.4:1235

# top-level failures
test_failure "no args" "Error: Missing --condition."

test_failure "unknown option" \
	"Error: Unknown option \`--hello\`" \
	--hello

test_failure "missing --action" \
	"Error: Need at least one --action." \
	--condition event-rule-matches --domain=user

test_failure "two --condition" \
	"Error: A --condition was already given." \
	--condition event-rule-matches --name=aaa --domain=user \
	--condition event-rule-matches --name=bbb --domain=user \
	--action notify

test_failure "missing argument to --name" \
	"Error: While parsing argument #1 (\`--name\`): Missing required argument for option \`--name\`" \
	--name

for cmd in rate-policy=once-after rate-policy=every; do
	test_failure "missing argument to --${cmd}" \
		"Error: Rate policy format is invalid." \
		--condition event-rule-matches --domain=user --action notify \
		--${cmd}

	test_failure "invalid argument to --${cmd}: non-digit character" \
		"Error: Failed to parse rate policy value \`123bob\` as an integer." \
		--condition event-rule-matches --domain=user --action notify \
		--${cmd}:123bob

	test_failure "invalid argument to --${cmd}: empty string" \
		"Error: Failed to parse rate policy value \`\` as an integer." \
		--condition event-rule-matches --domain=user --action notify \
		--${cmd}":"
done

test_failure "invalid argument to --rate-policy: unknown policy type" \
	"Error: Rate policy type \`bob\` unknown." \
	--condition event-rule-matches --domain=user --action notify \
	--rate-policy=bob:123

# `--condition` failures
test_failure "missing args after --condition" \
	"Error: While parsing argument #1 (\`--condition\`): Missing required argument for option \`--condition\`" \
	--condition
test_failure "unknown --condition" \
	"Error: Unknown condition name 'zoofest'" \
	--condition zoofest

# `--condition event-rule-matches` failures
test_failure "missing args after --condition event-rule-matches" \
	"Error: Please specify a domain (--domain=(kernel,user,jul,log4j,python))." \
	--condition event-rule-matches

test_failure "extra args after --condition event-rule-matches" \
	"Error: Unexpected argument 'bozo'" \
	--condition event-rule-matches --domain=user bozo

test_failure "two same --domain" \
	"Error: More than one \`--domain\` was specified." \
	--condition event-rule-matches --domain=user --domain=user

test_failure "two different --domain" \
	"Error: More than one \`--domain\` was specified." \
	--condition event-rule-matches --domain=user --domain=kernel

test_failure "--condition event-rule-matches: --name with --probe" \
	"Error: Can't use --name with probe event rules." \
	--condition event-rule-matches --probe=do_sys_open --name='hello'

test_failure "--condition event-rule-matches: --event-name with tracepoint" \
	"Error: Can't use --event-name with tracepoint event rules." \
	--condition event-rule-matches --domain=user --event-name='hello'

test_failure "--condition event-rule-matches: extra argument with --userspace-probe" \
	"Error: Unexpected argument 'hello'" \
	--condition event-rule-matches --domain=kernel --userspace-probe=${uprobe_elf_binary}:test_failure hello

test_failure "--condition event-rule-matches: extra argument with --syscall" \
	"Error: Unexpected argument 'open'" \
	--condition event-rule-matches --domain=kernel --syscall open

test_failure "--condition event-rule-matches --capture: missing argument (end of arg list)" \
	'Error: While parsing argument #2 (`--capture`): Missing required argument for option `--capture`' \
	--action notify \
	--condition event-rule-matches --domain=user --capture

test_failure "--condition event-rule-matches --capture: missing argument (before another option)" \
	'Error: While parsing expression `--action`: Unary operators are not allowed in capture expressions.' \
	--condition event-rule-matches --domain=user --capture \
	--action notify \

test_failure "--condition event-rule-matches --capture: binary operator" \
	'Error: While parsing expression `foo == 2`: Binary operators are not allowed in capture expressions.' \
	--condition event-rule-matches --domain=user \
	--capture 'foo == 2' --action notify

test_failure "--condition event-rule-matches --capture: unary operator" \
	'Error: While parsing expression `!foo`: Unary operators are not allowed in capture expressions.' \
	--condition event-rule-matches --domain=user \
	--capture '!foo' --action notify

test_failure "--condition event-rule-matches --capture: logical operator" \
	'Error: While parsing expression `foo || bar`: Logical operators are not allowed in capture expressions.' \
	--condition event-rule-matches --domain=user \
	--capture 'foo || bar' --action notify

test_failure "--condition event-rule-matches --capture: accessing a sub-field" \
	'Error: While parsing expression `foo.bar`: Capturing subfields is not supported.' \
	--condition event-rule-matches --domain=user \
	--capture 'foo.bar' --action notify

test_failure "--condition event-rule-matches --capture: accessing the sub-field of an array element" \
	'Error: While parsing expression `foo[3].bar`: Capturing subfields is not supported.' \
	--condition event-rule-matches --domain=user \
	--capture 'foo[3].bar' --action notify

test_failure "--condition event-rule-matches --capture: missing colon in app-specific context field" \
	'Error: Invalid app-specific context field name: missing colon in `foo`.' \
	--condition event-rule-matches --domain=user \
	--capture '$app.foo' --action notify

test_failure "--condition event-rule-matches --capture: missing colon in app-specific context field" \
	'Error: Invalid app-specific context field name: missing type name after colon in `foo:`.' \
	--condition event-rule-matches --domain=user \
	--capture '$app.foo:' --action notify

# `--action` failures
test_failure "missing args after --action" \
	"Error: While parsing argument #1 (\`--action\`): Missing required argument for option \`--action\`" \
	--condition event-rule-matches --domain=user \
	--action

# `--action notify` failures
test_failure "extra arg after --action notify" \
	"Error: Unexpected argument \`bob\`." \
	--condition event-rule-matches --domain=user \
	--action notify bob

# `--action start-session` failures
test_failure "missing arg after --action start-session" \
	"Error: Missing session name." \
	--condition event-rule-matches --domain=user \
	--action start-session
test_failure "extra arg after --action start-session" \
	"Error: Unexpected argument \`bob\`." \
	--condition event-rule-matches --domain=user \
	--action start-session ze-session bob

# `--action stop-session` failures
test_failure "missing arg after --action stop-session" \
	"Error: Missing session name." \
	--condition event-rule-matches --domain=user \
	--action stop-session
test_failure "extra arg after --action stop-session" \
	"Error: Unexpected argument \`bob\`." \
	--condition event-rule-matches --domain=user \
	--action stop-session ze-session bob

# `--action rotate-session` failures
test_failure "missing arg after --action rotate-session" \
	"Error: Missing session name." \
	--condition event-rule-matches --domain=user \
	--action rotate-session
test_failure "extra arg after --action rotate-session" \
	"Error: Unexpected argument \`bob\`." \
	--condition event-rule-matches --domain=user \
	--action rotate-session ze-session bob

# `--action snapshot-session` failures
test_failure "missing arg after --action snapshot-session" \
	"Error: Missing session name." \
	--condition event-rule-matches --domain=user \
	--action snapshot-session
test_failure "extra arg after --action snapshot-session" \
	"Error: Unexpected argument \`bob\`." \
	--condition event-rule-matches --domain=user \
	--action snapshot-session ze-session bob
test_failure "snapshot-session action, --max-size without destination" \
	"Error: Can't provide a snapshot output max size without a snapshot output destination." \
	--condition event-rule-matches --domain=user \
	--action snapshot-session ze-session --max-size 10M
test_failure "snapshot-session action, --name without destination" \
	"Error: Can't provide a snapshot output name without a snapshot output destination." \
	--condition event-rule-matches --domain=user \
	--action snapshot-session ze-session --name hallo
test_failure "snapshot-session action, --name with-local-path-instead-of-url" \
	"Error: Failed to parse '/something/that/looks/like/a/path' as an URL." \
	--condition event-rule-matches --domain=user \
	--action snapshot-session ze-session --name hallo --url /something/that/looks/like/a/path
test_failure "snapshot-session action, --name with-net-url-instead-of-path" \
	"Error: Failed to parse 'net://8.8.8.8/' as a local path." \
	--condition event-rule-matches --domain=user \
	--action snapshot-session ze-session --name hallo --path net://8.8.8.8/

# Cleanup
stop_lttng_sessiond_notap
rm -f "${tmp_stdout}"
rm -f "${tmp_stderr}"