1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
#!/bin/bash
# perf kallsyms tests
# SPDX-License-Identifier: GPL-2.0
err=0
test_kallsyms() {
echo "Basic perf kallsyms test"
# Check if /proc/kallsyms is readable
if [ ! -r /proc/kallsyms ]; then
echo "Basic perf kallsyms test [Skipped: /proc/kallsyms not readable]"
err=2
return
fi
# Use a symbol that is definitely a function and present in all kernels, e.g. schedule
symbol="schedule"
# Run perf kallsyms
# It prints "address symbol_name"
output=$(perf kallsyms $symbol 2>&1)
ret=$?
if [ $ret -ne 0 ] || [ -z "$output" ]; then
# If empty or failed, it might be due to permissions (kptr_restrict)
# Check if we can grep the symbol from /proc/kallsyms directly
if grep -q "$symbol" /proc/kallsyms 2>/dev/null; then
# If it's in /proc/kallsyms but perf kallsyms returned empty/error,
# it likely means perf couldn't parse it or access it correctly (e.g. kptr_restrict=2).
echo "Basic perf kallsyms test [Skipped: $symbol found in /proc/kallsyms but perf kallsyms failed (output: '$output')]"
err=2
return
else
echo "Basic perf kallsyms test [Skipped: $symbol not found in /proc/kallsyms]"
err=2
return
fi
fi
if echo "$output" | grep -q "not found"; then
echo "Basic perf kallsyms test [Failed: output '$output' does not contain $symbol]"
err=1
return
fi
if perf kallsyms ErlingHaaland | grep -vq "not found"; then
echo "Basic perf kallsyms test [Failed: ErlingHaaland found in the output]"
err=1
return
fi
echo "Basic perf kallsyms test [Success]"
}
test_kallsyms
exit $err
|
