Fix: Tests: race condition in test_ns_contexts_change
[lttng-tools.git] / tests / regression / ust / namespaces / test_ns_contexts_change
1 #!/bin/bash
2 #
3 # Copyright (C) 2019 Michael Jeanson <mjeanson@efficios.com>
4 #
5 # SPDX-License-Identifier: LGPL-2.1-only
6
7 TEST_DESC="UST - Namespace contexts change"
8
9 CURDIR=$(dirname "$0")/
10 TESTDIR=$CURDIR/../../..
11
12 TESTAPP_PATH="$TESTDIR/utils/testapp"
13 TESTAPP_NAME="gen-ust-events-ns"
14 TESTAPP_BIN="$TESTAPP_PATH/$TESTAPP_NAME/$TESTAPP_NAME"
15 NUM_EVENT=1000
16 EVENT_NAME="tp:tptest"
17
18 TESTS_PER_NS=16
19
20 NUM_TESTS=$((TESTS_PER_NS * 5))
21
22 source "$TESTDIR/utils/utils.sh"
23
24 # MUST set TESTDIR before calling those functions
25
26 function test_ns()
27 {
28 local ns=$1
29
30 local session_name="${ns}_ns"
31 local chan_name="${ns}_ns"
32 local context_name="${ns}_ns"
33
34 local trace_path
35 local ns_inode
36 local file_sync_before_last
37 local file_sync_after_unshare
38
39 # Check if the kernel has support for this ns type
40 if [ ! -f "/proc/$$/ns/$ns" ]; then
41 skip 0 "System has no $ns namespace support" $TESTS_PER_NS
42 return
43 fi
44
45 # Get the current ns inode number
46 ns_inode=$(stat -c '%i' -L "/proc/$$/ns/$ns")
47 ok $? "Get current $ns namespace inode: $ns_inode" || ns_inode="invalid"
48
49 trace_path=$(mktemp --tmpdir -d "tmp.${FUNCNAME[0]}_trace_path.XXXXXX")
50 file_sync_before_last=$(mktemp --tmpdir -u "tmp.${FUNCNAME[0]}_sync_before_last.XXXXXX")
51 file_sync_after_unshare=$(mktemp --tmpdir -u "tmp.${FUNCNAME[0]}_sync_after_unshare.XXXXXX")
52
53 start_lttng_sessiond
54
55 create_lttng_session_ok "$session_name" "$trace_path"
56 enable_ust_lttng_channel_ok "$session_name" "$chan_name"
57 add_context_ust_ok "$session_name" "$chan_name" "$context_name"
58 enable_ust_lttng_event_ok "$session_name" "$EVENT_NAME" "$chan_name"
59 start_lttng_tracing_ok "$session_name"
60
61 $TESTAPP_BIN -n "$ns" -i $NUM_EVENT -a "$file_sync_after_unshare" -b "$file_sync_before_last" &
62 app_pid=$!
63
64 while [ ! -f "$file_sync_after_unshare" ]; do
65 # Break if the app failed / died
66 if ! kill -0 "$app_pid" ; then
67 echo "# App failed"
68 break
69 fi
70 echo "# Waiting for app..."
71 sleep 0.5
72 done
73
74 app_ns_inode=$(stat -c '%i' -L "/proc/$app_pid/ns/$ns")
75 ok $? "Get current $ns namespace inode: $app_ns_inode" || app_ns_inode="invalid"
76
77 test "$ns_inode" != "invalid" && test "$app_ns_inode" != "invalid" && test "$ns_inode" != "$app_ns_inode"
78 ok $? "Reported namespace inode changed after unshare"
79
80 touch "$file_sync_before_last"
81
82 # Wait for the test app to generate all expected events and exit.
83 wait $app_pid
84
85 # stop and destroy
86 stop_lttng_tracing_ok "$session_name"
87 destroy_lttng_session_ok "$session_name"
88 stop_lttng_sessiond
89
90 # Check that the events contain the right namespace inode number
91 validate_trace_count "${ns}_ns = $ns_inode" "$trace_path" $NUM_EVENT
92 validate_trace_count "${ns}_ns = $app_ns_inode" "$trace_path" $NUM_EVENT
93
94 rm -rf "$trace_path"
95 rm -f "$file_sync_before_last"
96 rm -f "$file_sync_after_unshare"
97 }
98
99
100 plan_tests $NUM_TESTS
101
102 print_test_banner "$TEST_DESC"
103
104 isroot=0
105 if [ "$(id -u)" == "0" ]; then
106 isroot=1
107 fi
108
109 skip $isroot "Root access is needed. Skipping all tests." "$NUM_TESTS" && exit 0
110
111 system_has_ns=0
112 if [ -d "/proc/$$/ns" ]; then
113 system_has_ns=1
114 fi
115
116 skip $system_has_ns "System has no namespaces support" $NUM_TESTS && exit 0
117
118
119 test_ns cgroup
120 test_ns ipc
121 test_ns mnt
122 test_ns net
123 #test_ns pid # pid_ns is special, can't be changed that way
124 #test_ns time # time_ns is special, can't be changed that way
125 #test_ns user # user_ns can only be change when the app is single threaded, this is always false for an ust instrumented app
126 test_ns uts
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