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a0b1f42c JD |
1 | #!/bin/bash |
2 | # | |
9d16b343 | 3 | # Copyright (C) 2016 Julien Desfossez <jdesfossez@efficios.com> |
a0b1f42c | 4 | # |
9d16b343 | 5 | # SPDX-License-Identifier: GPL-2.0-only |
a0b1f42c | 6 | # |
a0b1f42c JD |
7 | |
8 | TEST_DESC="Kernel tracer - select, poll and epoll payload extraction" | |
9 | ||
10 | CURDIR=$(dirname $0)/ | |
11 | TESTDIR=$CURDIR/../.. | |
12 | VALIDATE_SCRIPT="$CURDIR/validate_select_poll_epoll.py" | |
13 | NUM_TESTS=102 | |
14 | ||
15 | # Only run this test on x86 and arm | |
16 | uname -m | grep -E "x86|i686|arm|aarch64" >/dev/null 2>&1 | |
17 | if test $? != 0; then | |
18 | exit 0 | |
19 | fi | |
20 | ||
21 | DISABLE_VALIDATE=0 | |
22 | # Babeltrace python bindings are required for the validation, but | |
23 | # it is not a mandatory dependancy of the project, so fail run the | |
24 | # without the content validation, at least we test that we are not | |
25 | # crashing the kernel. | |
26 | $VALIDATE_SCRIPT --help >/dev/null 2>&1 | |
27 | if test $? != 0; then | |
28 | echo "# Failed to run the validation script, Babeltrace Python bindings might be missing" | |
29 | DISABLE_VALIDATE=1 | |
30 | fi | |
31 | ||
32 | LAST_WARNING=$(dmesg | grep " WARNING:" | cut -d' ' -f1 | tail -1) | |
33 | LAST_OOPS=$(dmesg | grep " OOPS:" | cut -d' ' -f1 | tail -1) | |
34 | LAST_BUG=$(dmesg | grep " BUG:" | cut -d' ' -f1 | tail -1) | |
35 | ||
36 | source $TESTDIR/utils/utils.sh | |
37 | ||
38 | function check_trace_content() | |
39 | { | |
40 | if test $DISABLE_VALIDATE == 1; then | |
41 | ok 0 "Validation skipped" | |
42 | return | |
43 | fi | |
44 | ||
45 | $VALIDATE_SCRIPT $@ | |
46 | if test $? = 0; then | |
47 | ok 0 "Validation success" | |
48 | else | |
49 | fail "Validation" | |
50 | fi | |
51 | } | |
52 | ||
53 | function test_working_cases() | |
54 | { | |
7539dcec | 55 | TRACE_PATH=$(mktemp --tmpdir -d "tmp.${FUNCNAME[0]}_trace_path.XXXXXX") |
a0b1f42c JD |
56 | SESSION_NAME="syscall_payload" |
57 | ||
58 | # arm64 does not have epoll_wait | |
59 | uname -m | grep -E "aarch64" >/dev/null 2>&1 | |
60 | if test $? = 0; then | |
61 | SYSCALL_LIST="select,pselect6,poll,ppoll,epoll_ctl,epoll_pwait" | |
62 | else | |
63 | SYSCALL_LIST="select,pselect6,poll,ppoll,epoll_ctl,epoll_wait,epoll_pwait" | |
64 | fi | |
65 | ||
66 | diag "Working cases for select, pselect6, poll, ppoll and epoll, waiting for input" | |
67 | ||
68 | create_lttng_session_ok $SESSION_NAME $TRACE_PATH | |
69 | ||
70 | lttng_enable_kernel_syscall_ok $SESSION_NAME $SYSCALL_LIST | |
71 | add_context_kernel_ok $SESSION_NAME channel0 pid | |
72 | ||
73 | start_lttng_tracing_ok | |
74 | { out=$(yes | $CURDIR/select_poll_epoll -t 1); } 2>/dev/null | |
75 | stop_lttng_tracing_ok | |
76 | pid=$(echo $out | cut -d' ' -f1) | |
77 | ||
78 | validate_trace "$SYSCALL_LIST" $TRACE_PATH | |
79 | check_trace_content -t 1 -p $pid $TRACE_PATH | |
80 | ||
81 | destroy_lttng_session_ok $SESSION_NAME | |
82 | ||
83 | rm -rf $TRACE_PATH | |
84 | } | |
85 | ||
86 | function test_timeout_cases() | |
87 | { | |
7539dcec | 88 | TRACE_PATH=$(mktemp --tmpdir -d "tmp.${FUNCNAME[0]}_trace_path.XXXXXX") |
a0b1f42c JD |
89 | SESSION_NAME="syscall_payload" |
90 | ||
91 | # arm64 does not have epoll_wait | |
92 | uname -m | grep -E "aarch64" >/dev/null 2>&1 | |
93 | if test $? = 0; then | |
94 | SYSCALL_LIST="select,pselect6,poll,ppoll,epoll_ctl,epoll_pwait" | |
95 | else | |
96 | SYSCALL_LIST="select,pselect6,poll,ppoll,epoll_ctl,epoll_wait,epoll_pwait" | |
97 | fi | |
98 | ||
99 | diag "Timeout cases (1ms) for select, pselect6, poll, ppoll and epoll" | |
100 | ||
101 | create_lttng_session_ok $SESSION_NAME $TRACE_PATH | |
102 | ||
103 | lttng_enable_kernel_syscall_ok $SESSION_NAME "$SYSCALL_LIST" | |
104 | add_context_kernel_ok $SESSION_NAME channel0 pid | |
105 | ||
106 | start_lttng_tracing_ok | |
107 | { out=$($CURDIR/select_poll_epoll -t 2); } 2>/dev/null | |
108 | stop_lttng_tracing_ok | |
109 | pid=$(echo $out | cut -d' ' -f1) | |
110 | ||
111 | validate_trace "$SYSCALL_LIST" $TRACE_PATH | |
112 | check_trace_content -t 2 -p $pid $TRACE_PATH 2>/dev/null | |
113 | ||
114 | destroy_lttng_session_ok $SESSION_NAME | |
115 | ||
116 | rm -rf $TRACE_PATH | |
117 | } | |
118 | ||
8b3b99e2 | 119 | function test_pselect_invalid_fd() |
a0b1f42c | 120 | { |
7539dcec | 121 | TRACE_PATH=$(mktemp --tmpdir -d "tmp.${FUNCNAME[0]}_trace_path.XXXXXX") |
a0b1f42c JD |
122 | SESSION_NAME="syscall_payload" |
123 | SYSCALL_LIST="pselect6" | |
124 | ||
8b3b99e2 | 125 | diag "pselect with invalid FD" |
a0b1f42c JD |
126 | |
127 | create_lttng_session_ok $SESSION_NAME $TRACE_PATH | |
128 | ||
129 | lttng_enable_kernel_syscall_ok $SESSION_NAME $SYSCALL_LIST | |
130 | add_context_kernel_ok $SESSION_NAME channel0 pid | |
131 | ||
132 | start_lttng_tracing_ok | |
133 | { out=$($CURDIR/select_poll_epoll -t 3); } 2>/dev/null | |
134 | stop_lttng_tracing_ok | |
135 | pid=$(echo $out | cut -d' ' -f1) | |
136 | ||
137 | validate_trace "$SYSCALL_LIST" $TRACE_PATH | |
138 | check_trace_content -t 3 -p $pid $TRACE_PATH 2>/dev/null | |
139 | ||
140 | destroy_lttng_session_ok $SESSION_NAME | |
141 | ||
142 | rm -rf $TRACE_PATH | |
143 | } | |
144 | ||
145 | function test_big_ppoll() | |
146 | { | |
7539dcec | 147 | TRACE_PATH=$(mktemp --tmpdir -d "tmp.${FUNCNAME[0]}_trace_path.XXXXXX") |
a0b1f42c JD |
148 | SESSION_NAME="syscall_payload" |
149 | SYSCALL_LIST="ppoll" | |
150 | ||
151 | diag "ppoll with 2047 FDs" | |
152 | ||
153 | create_lttng_session_ok $SESSION_NAME $TRACE_PATH | |
154 | ||
155 | lttng_enable_kernel_syscall_ok $SESSION_NAME $SYSCALL_LIST | |
156 | add_context_kernel_ok $SESSION_NAME channel0 pid | |
157 | ||
158 | start_lttng_tracing_ok | |
159 | { out=$(yes | $CURDIR/select_poll_epoll -t 4); } 2>/dev/null | |
160 | stop_lttng_tracing_ok | |
161 | pid=$(echo $out | cut -d' ' -f1) | |
162 | ||
163 | validate_trace "$SYSCALL_LIST" $TRACE_PATH | |
164 | check_trace_content -t 4 -p $pid $TRACE_PATH 2>/dev/null | |
165 | ||
166 | destroy_lttng_session_ok $SESSION_NAME | |
167 | ||
168 | rm -rf $TRACE_PATH | |
169 | } | |
170 | ||
171 | function test_ppoll_overflow() | |
172 | { | |
7539dcec | 173 | TRACE_PATH=$(mktemp --tmpdir -d "tmp.${FUNCNAME[0]}_trace_path.XXXXXX") |
a0b1f42c JD |
174 | SESSION_NAME="syscall_payload" |
175 | SYSCALL_LIST="ppoll" | |
176 | ||
177 | diag "ppoll buffer overflow, should segfault, waits for input" | |
178 | ||
179 | create_lttng_session_ok $SESSION_NAME $TRACE_PATH | |
180 | ||
181 | lttng_enable_kernel_syscall_ok $SESSION_NAME $SYSCALL_LIST | |
182 | add_context_kernel_ok $SESSION_NAME channel0 pid | |
183 | ||
184 | start_lttng_tracing_ok | |
185 | diag "Expect segfaults" | |
186 | { out=$(yes | $CURDIR/select_poll_epoll -t 5); } 2>/dev/null | |
187 | stop_lttng_tracing_ok | |
188 | echo $out | |
189 | pid=$(echo $out | cut -d' ' -f1) | |
190 | ||
191 | validate_trace "$SYSCALL_LIST" $TRACE_PATH | |
192 | ||
193 | check_trace_content -t 5 -p $pid $TRACE_PATH 2>/dev/null | |
194 | ||
195 | destroy_lttng_session_ok $SESSION_NAME | |
196 | ||
197 | rm -rf $TRACE_PATH | |
198 | } | |
199 | ||
200 | function test_pselect_invalid_ptr() | |
201 | { | |
7539dcec | 202 | TRACE_PATH=$(mktemp --tmpdir -d "tmp.${FUNCNAME[0]}_trace_path.XXXXXX") |
a0b1f42c JD |
203 | SESSION_NAME="syscall_payload" |
204 | SYSCALL_LIST="pselect6" | |
205 | ||
206 | diag "pselect with invalid pointer, waits for input" | |
207 | ||
208 | create_lttng_session_ok $SESSION_NAME $TRACE_PATH | |
209 | ||
210 | lttng_enable_kernel_syscall_ok $SESSION_NAME $SYSCALL_LIST | |
211 | add_context_kernel_ok $SESSION_NAME channel0 pid | |
212 | ||
213 | start_lttng_tracing_ok | |
214 | { out=$(yes | $CURDIR/select_poll_epoll -t 6); } 2>/dev/null | |
215 | stop_lttng_tracing_ok | |
216 | pid=$(echo $out | cut -d' ' -f1) | |
217 | ||
218 | validate_trace "$SYSCALL_LIST" $TRACE_PATH | |
219 | check_trace_content -t 6 -p $pid $TRACE_PATH 2>/dev/null | |
220 | ||
221 | destroy_lttng_session_ok $SESSION_NAME | |
222 | ||
223 | rm -rf $TRACE_PATH | |
224 | } | |
225 | ||
226 | function test_ppoll_ulong_max() | |
227 | { | |
7539dcec | 228 | TRACE_PATH=$(mktemp --tmpdir -d "tmp.${FUNCNAME[0]}_trace_path.XXXXXX") |
a0b1f42c JD |
229 | SESSION_NAME="syscall_payload" |
230 | SYSCALL_LIST="ppoll" | |
231 | ||
232 | diag "ppoll with ulong_max fds, waits for input" | |
233 | ||
234 | create_lttng_session_ok $SESSION_NAME $TRACE_PATH | |
235 | ||
236 | lttng_enable_kernel_syscall_ok $SESSION_NAME $SYSCALL_LIST | |
237 | add_context_kernel_ok $SESSION_NAME channel0 pid | |
238 | ||
239 | start_lttng_tracing_ok | |
240 | { out=$(yes | $CURDIR/select_poll_epoll -t 7); } 2>/dev/null | |
241 | stop_lttng_tracing_ok | |
242 | pid=$(echo $out | cut -d' ' -f1) | |
243 | ||
244 | validate_trace "$SYSCALL_LIST" $TRACE_PATH | |
245 | check_trace_content -t 7 -p $pid $TRACE_PATH 2>/dev/null | |
246 | ||
247 | destroy_lttng_session_ok $SESSION_NAME | |
248 | ||
249 | rm -rf $TRACE_PATH | |
250 | } | |
251 | ||
252 | function test_epoll_pwait_invalid_ptr() | |
253 | { | |
7539dcec | 254 | TRACE_PATH=$(mktemp --tmpdir -d "tmp.${FUNCNAME[0]}_trace_path.XXXXXX") |
a0b1f42c JD |
255 | SESSION_NAME="syscall_payload" |
256 | SYSCALL_LIST="epoll_pwait" | |
257 | ||
258 | diag "epoll_pwait with invalid pointer, waits for input" | |
259 | ||
260 | create_lttng_session_ok $SESSION_NAME $TRACE_PATH | |
261 | ||
262 | lttng_enable_kernel_syscall_ok $SESSION_NAME $SYSCALL_LIST | |
263 | add_context_kernel_ok $SESSION_NAME channel0 pid | |
264 | ||
265 | start_lttng_tracing_ok | |
266 | { out=$(yes | $CURDIR/select_poll_epoll -t 8); } 2>/dev/null | |
267 | stop_lttng_tracing_ok | |
268 | pid=$(echo $out | cut -d' ' -f1) | |
269 | ||
270 | validate_trace "$SYSCALL_LIST" $TRACE_PATH | |
271 | check_trace_content -t 8 -p $pid $TRACE_PATH 2>/dev/null | |
272 | ||
273 | destroy_lttng_session_ok $SESSION_NAME | |
274 | ||
275 | rm -rf $TRACE_PATH | |
276 | } | |
277 | ||
278 | function test_epoll_pwait_int_max() | |
279 | { | |
7539dcec | 280 | TRACE_PATH=$(mktemp --tmpdir -d "tmp.${FUNCNAME[0]}_trace_path.XXXXXX") |
a0b1f42c JD |
281 | SESSION_NAME="syscall_payload" |
282 | SYSCALL_LIST="epoll_pwait" | |
283 | ||
284 | diag "epoll_pwait with maxevents set to INT_MAX, waits for input" | |
285 | ||
286 | create_lttng_session_ok $SESSION_NAME $TRACE_PATH | |
287 | ||
288 | lttng_enable_kernel_syscall_ok $SESSION_NAME $SYSCALL_LIST | |
289 | add_context_kernel_ok $SESSION_NAME channel0 pid | |
290 | ||
291 | start_lttng_tracing_ok | |
292 | { out=$(yes | $CURDIR/select_poll_epoll -t 9); } 2>/dev/null | |
293 | stop_lttng_tracing_ok | |
294 | pid=$(echo $out | cut -d' ' -f1) | |
295 | ||
296 | validate_trace "$SYSCALL_LIST" $TRACE_PATH | |
297 | check_trace_content -t 9 -p $pid $TRACE_PATH 2>/dev/null | |
298 | ||
299 | destroy_lttng_session_ok $SESSION_NAME | |
300 | ||
301 | rm -rf $TRACE_PATH | |
302 | } | |
303 | ||
304 | function test_ppoll_concurrent() | |
305 | { | |
7539dcec | 306 | TRACE_PATH=$(mktemp --tmpdir -d "tmp.${FUNCNAME[0]}_trace_path.XXXXXX") |
a0b1f42c JD |
307 | SESSION_NAME="syscall_payload" |
308 | SYSCALL_LIST="ppoll" | |
309 | ||
310 | diag "ppoll with concurrent updates of the structure from user-space, stress test (3000 iterations), waits for input + timeout 1ms" | |
311 | ||
312 | create_lttng_session_ok $SESSION_NAME $TRACE_PATH | |
313 | ||
314 | lttng_enable_kernel_syscall_ok $SESSION_NAME $SYSCALL_LIST | |
315 | add_context_kernel_ok $SESSION_NAME channel0 pid | |
316 | ||
317 | start_lttng_tracing_ok | |
318 | { out=$(yes | $CURDIR/select_poll_epoll -t 10); } 2>/dev/null | |
319 | stop_lttng_tracing_ok | |
320 | pid=$(echo $out | cut -d' ' -f1) | |
321 | ||
322 | validate_trace "$SYSCALL_LIST" $TRACE_PATH | |
323 | check_trace_content -t 10 -p $pid $TRACE_PATH 2>/dev/null | |
324 | ||
325 | destroy_lttng_session_ok $SESSION_NAME | |
326 | ||
327 | rm -rf $TRACE_PATH | |
328 | } | |
329 | ||
330 | function test_epoll_pwait_concurrent() | |
331 | { | |
7539dcec | 332 | TRACE_PATH=$(mktemp --tmpdir -d "tmp.${FUNCNAME[0]}_trace_path.XXXXXX") |
a0b1f42c JD |
333 | SESSION_NAME="syscall_payload" |
334 | SYSCALL_LIST="epoll_ctl,epoll_pwait" | |
335 | ||
336 | diag "epoll_pwait with concurrent munmap of the buffer from user-space, should randomly segfault, run multiple times, waits for input + timeout 1ms" | |
337 | ||
338 | create_lttng_session_ok $SESSION_NAME $TRACE_PATH | |
339 | ||
340 | lttng_enable_kernel_syscall_ok $SESSION_NAME $SYSCALL_LIST | |
341 | add_context_kernel_ok $SESSION_NAME channel0 pid | |
342 | ||
343 | start_lttng_tracing_ok | |
344 | diag "Expect segfaults" | |
345 | for i in $(seq 1 100); do | |
346 | { out=$($CURDIR/select_poll_epoll -t 11); } 2>/dev/null | |
347 | done | |
348 | pid=$(echo $out | cut -d' ' -f1) | |
349 | stop_lttng_tracing_ok | |
350 | ||
351 | # epoll_wait is not always generated in the trace (stress test) | |
352 | validate_trace "epoll_ctl" $TRACE_PATH | |
353 | check_trace_content -t 11 -p $pid $TRACE_PATH 2>/dev/null | |
354 | ||
355 | destroy_lttng_session_ok $SESSION_NAME | |
356 | ||
357 | rm -rf $TRACE_PATH | |
358 | } | |
359 | ||
360 | # MUST set TESTDIR before calling those functions | |
361 | plan_tests $NUM_TESTS | |
362 | ||
363 | print_test_banner "$TEST_DESC" | |
364 | ||
365 | if [ "$(id -u)" == "0" ]; then | |
366 | isroot=1 | |
367 | else | |
368 | isroot=0 | |
369 | fi | |
370 | ||
371 | skip $isroot "Root access is needed. Skipping all tests." $NUM_TESTS || | |
372 | { | |
373 | start_lttng_sessiond | |
374 | ||
375 | test_working_cases | |
376 | test_timeout_cases | |
8b3b99e2 | 377 | test_pselect_invalid_fd |
a0b1f42c JD |
378 | test_big_ppoll |
379 | test_ppoll_overflow | |
380 | test_pselect_invalid_ptr | |
381 | test_ppoll_ulong_max | |
382 | test_epoll_pwait_invalid_ptr | |
383 | test_epoll_pwait_int_max | |
384 | test_ppoll_concurrent | |
385 | test_epoll_pwait_concurrent | |
386 | ||
387 | stop_lttng_sessiond | |
388 | ||
389 | NEW_WARNING=$(dmesg | grep " WARNING:" | cut -d' ' -f1 | tail -1) | |
390 | NEW_OOPS=$(dmesg | grep " OOPS:" | cut -d' ' -f1 | tail -1) | |
391 | NEW_BUG=$(dmesg | grep " BUG:" | cut -d' ' -f1 | tail -1) | |
392 | ||
393 | if test "$LAST_WARNING" != "$NEW_WARNING"; then | |
394 | fail "New WARNING generated" | |
395 | fi | |
396 | if test "$LAST_OOPS" != "$NEW_OOPS"; then | |
397 | fail "New OOPS generated" | |
398 | fi | |
399 | if test "$LAST_BUG" != "$NEW_BUG"; then | |
400 | fail "New BUG generated" | |
401 | fi | |
402 | } |