Tests: add UST namespace context change tests
[lttng-tools.git] / tests / regression / ust / namespaces / test_ns_contexts_change
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MJ
1#!/bin/bash
2#
3# Copyright (C) 2019 Michael Jeanson <mjeanson@efficios.com>
4#
5# This library is free software; you can redistribute it and/or modify it under
6# the terms of the GNU Lesser General Public License as published by the Free
7# Software Foundation; version 2.1 of the License.
8#
9# This library is distributed in the hope that it will be useful, but WITHOUT
10# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12# details.
13#
14# You should have received a copy of the GNU Lesser General Public License
15# along with this library; if not, write to the Free Software Foundation, Inc.,
16# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17
18TEST_DESC="UST - Namespace contexts change"
19
20CURDIR=$(dirname "$0")/
21TESTDIR=$CURDIR/../../..
22
23TESTAPP_PATH="$TESTDIR/utils/testapp"
24TESTAPP_NAME="gen-ust-events-ns"
25TESTAPP_BIN="$TESTAPP_PATH/$TESTAPP_NAME/$TESTAPP_NAME"
26NUM_EVENT=1000
27EVENT_NAME="tp:tptest"
28
29TESTS_PER_NS=16
30
31NUM_TESTS=$((TESTS_PER_NS * 5))
32
33source "$TESTDIR/utils/utils.sh"
34
35# MUST set TESTDIR before calling those functions
36
37function test_ns()
38{
39 local ns=$1
40
41 local session_name="${ns}_ns"
42 local chan_name="${ns}_ns"
43 local context_name="${ns}_ns"
44
45 local trace_path
46 local ns_inode
47 local file_sync_before_last
48 local file_sync_after_unshare
49
50 # Check if the kernel has support for this ns type
51 if [ ! -f "/proc/$$/ns/$ns" ]; then
52 skip 0 "System has no $ns namespace support" $TESTS_PER_NS
53 return
54 fi
55
56 # Get the current ns inode number
57 ns_inode=$(stat -c '%i' -L "/proc/$$/ns/$ns")
58 ok $? "Get current $ns namespace inode: $ns_inode" || ns_inode="invalid"
59
60 trace_path=$(mktemp -d)
61 file_sync_before_last=$(mktemp -u)
62 file_sync_after_unshare=$(mktemp -u)
63
64 start_lttng_sessiond
65
66 create_lttng_session_ok "$session_name" "$trace_path"
67 enable_ust_lttng_channel_ok "$session_name" "$chan_name"
68 add_context_ust_ok "$session_name" "$chan_name" "$context_name"
69 enable_ust_lttng_event_ok "$session_name" "$EVENT_NAME" "$chan_name"
70 start_lttng_tracing_ok "$session_name"
71
72 $TESTAPP_BIN -n "$ns" -i $NUM_EVENT -a "$file_sync_after_unshare" -b "$file_sync_before_last" &
73 app_pid=$!
74
75 # Let the app do it's thing before entering the synchronisation loop
76 sleep 0.5
77
78 while [ ! -f "$file_sync_after_unshare" ]; do
79 # Break if the app failed / died
80 if [ ! -f "/proc/$app_pid" ]; then
81 break
82 fi
83 echo "# Waiting for app..."
84 sleep 0.5
85 done
86
87 app_ns_inode=$(stat -c '%i' -L "/proc/$app_pid/ns/$ns")
88 ok $? "Get current $ns namespace inode: $app_ns_inode" || app_ns_inode="invalid"
89
90 test "$ns_inode" != "invalid" && test "$app_ns_inode" != "invalid" && test "$ns_inode" != "$app_ns_inode"
91 ok $? "Reported namespace inode changed after unshare"
92
93 touch "$file_sync_before_last"
94
95 # stop and destroy
96 stop_lttng_tracing_ok "$session_name"
97 destroy_lttng_session_ok "$session_name"
98 stop_lttng_sessiond
99
100 # Check that the events contain the right namespace inode number
101 validate_trace_count "${ns}_ns = $ns_inode" "$trace_path" $NUM_EVENT
102 validate_trace_count "${ns}_ns = $app_ns_inode" "$trace_path" $NUM_EVENT
103
104 rm -rf "$trace_path"
105 rm -f "$file_sync_before_last"
106 rm -f "$file_sync_after_unshare"
107}
108
109
110plan_tests $NUM_TESTS
111
112print_test_banner "$TEST_DESC"
113
114isroot=0
115if [ "$(id -u)" == "0" ]; then
116 isroot=1
117fi
118
119skip $isroot "Root access is needed. Skipping all tests." "$NUM_TESTS" && exit 0
120
121system_has_ns=0
122if [ -d "/proc/$$/ns" ]; then
123 system_has_ns=1
124fi
125
126skip $system_has_ns "System has no namespaces support" $NUM_TESTS && exit 0
127
128
129test_ns cgroup
130test_ns ipc
131test_ns mnt
132test_ns net
133#test_ns pid # pid_ns is special, can't be changed that way
134#test_ns user # user_ns can only be change when the app is single threaded, this is always false for an ust instrumented app
135test_ns uts
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