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Commit | Line | Data |
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c6c93242 | 1 | #!/bin/sh |
b2441318 | 2 | # SPDX-License-Identifier: GPL-2.0 |
c6c93242 SRRH |
3 | # description: ftrace - function graph filters with stack tracer |
4 | ||
5 | # Make sure that function graph filtering works, and is not | |
6 | # affected by other tracers enabled (like stack tracer) | |
7 | ||
8 | if ! grep -q function_graph available_tracers; then | |
9 | echo "no function graph tracer configured" | |
10 | exit_unsupported | |
11 | fi | |
12 | ||
13 | if [ ! -f set_ftrace_filter ]; then | |
14 | echo "set_ftrace_filter not found? Is dynamic ftrace not set?" | |
15 | exit_unsupported | |
16 | fi | |
17 | ||
18 | do_reset() { | |
19 | reset_tracer | |
a05ffdce ME |
20 | if [ -e /proc/sys/kernel/stack_tracer_enabled ]; then |
21 | echo 0 > /proc/sys/kernel/stack_tracer_enabled | |
22 | fi | |
c6c93242 SRRH |
23 | enable_tracing |
24 | clear_trace | |
25 | echo > set_ftrace_filter | |
26 | } | |
27 | ||
28 | fail() { # msg | |
29 | do_reset | |
30 | echo $1 | |
44164c4b | 31 | exit $FAIL |
c6c93242 SRRH |
32 | } |
33 | ||
34 | disable_tracing | |
35 | clear_trace; | |
36 | ||
37 | # filter something, schedule is always good | |
38 | if ! echo "schedule" > set_ftrace_filter; then | |
39 | # test for powerpc 64 | |
40 | if ! echo ".schedule" > set_ftrace_filter; then | |
41 | fail "can not enable schedule filter" | |
42 | fi | |
43 | fi | |
44 | ||
45 | echo function_graph > current_tracer | |
46 | ||
47 | if [ ! -f stack_trace ]; then | |
48 | echo "Stack tracer not configured" | |
49 | do_reset | |
50 | exit_unsupported; | |
51 | fi | |
52 | ||
53 | echo "Now testing with stack tracer" | |
54 | ||
55 | echo 1 > /proc/sys/kernel/stack_tracer_enabled | |
56 | ||
57 | disable_tracing | |
58 | clear_trace | |
59 | enable_tracing | |
60 | sleep 1 | |
61 | ||
62 | count=`cat trace | grep '()' | grep -v schedule | wc -l` | |
63 | ||
64 | if [ $count -ne 0 ]; then | |
65 | fail "Graph filtering not working with stack tracer?" | |
66 | fi | |
67 | ||
68 | # Make sure we did find something | |
69 | count=`cat trace | grep 'schedule()' | wc -l` | |
70 | if [ $count -eq 0 ]; then | |
71 | fail "No schedule traces found?" | |
72 | fi | |
73 | ||
74 | echo 0 > /proc/sys/kernel/stack_tracer_enabled | |
75 | clear_trace | |
76 | sleep 1 | |
77 | ||
78 | ||
79 | count=`cat trace | grep '()' | grep -v schedule | wc -l` | |
80 | ||
81 | if [ $count -ne 0 ]; then | |
82 | fail "Graph filtering not working after stack tracer disabled?" | |
83 | fi | |
84 | ||
85 | count=`cat trace | grep 'schedule()' | wc -l` | |
86 | if [ $count -eq 0 ]; then | |
87 | fail "No schedule traces found?" | |
88 | fi | |
89 | ||
90 | do_reset | |
91 | ||
92 | exit 0 |