Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#!/bin/bash
2# perf trace BTF general tests
3# SPDX-License-Identifier: GPL-2.0
4
5err=0
6
7# shellcheck source=lib/probe.sh
8. "$(dirname $0)"/lib/probe.sh
9
10file1=$(mktemp /tmp/file1_XXXX)
11file2=$(echo $file1 | sed 's/file1/file2/g')
12
13buffer="buffer content"
14perf_config_tmp=$(mktemp /tmp/.perfconfig_XXXXX)
15
16trap cleanup EXIT TERM INT HUP
17
18check_vmlinux() {
19 echo "Checking if vmlinux BTF exists"
20 if [ ! -f /sys/kernel/btf/vmlinux ]
21 then
22 echo "Skipped due to missing vmlinux BTF"
23 return 2
24 fi
25 return 0
26}
27
28trace_test_string() {
29 echo "Testing perf trace's string augmentation"
30 output="$(perf trace --sort-events -e renameat* --max-events=1 -- mv ${file1} ${file2} 2>&1)"
31 if ! echo "$output" | grep -q -E "^mv/[0-9]+ renameat(2)?\(.*, \"${file1}\", .*, \"${file2}\", .*\) += +[0-9]+$"
32 then
33 printf "String augmentation test failed, output:\n$output\n"
34 err=1
35 fi
36}
37
38trace_test_buffer() {
39 echo "Testing perf trace's buffer augmentation"
40 # echo will insert a newline (\10) at the end of the buffer
41 output="$(perf trace --sort-events -e write --max-events=1 -- echo "${buffer}" 2>&1)"
42 if ! echo "$output" | grep -q -E "^echo/[0-9]+ write\([0-9]+, ${buffer}.*, [0-9]+\) += +[0-9]+$"
43 then
44 printf "Buffer augmentation test failed, output:\n$output\n"
45 err=1
46 fi
47}
48
49trace_test_struct_btf() {
50 echo "Testing perf trace's struct augmentation"
51 output="$(perf trace --sort-events -e clock_nanosleep --force-btf --max-events=1 -- sleep 1 2>&1)"
52 if ! echo "$output" | grep -q -E "^sleep/[0-9]+ clock_nanosleep\(0, 0, \{1,.*\}, 0x[0-9a-f]+\) += +[0-9]+$"
53 then
54 printf "BTF struct augmentation test failed, output:\n$output\n"
55 err=1
56 fi
57}
58
59cleanup() {
60 rm -rf ${file1} ${file2} ${perf_config_tmp}
61}
62
63trap_cleanup() {
64 echo "Unexpected signal in ${FUNCNAME[1]}"
65 cleanup
66 exit 1
67}
68
69# don't overwrite user's perf config
70trace_config() {
71 export PERF_CONFIG=${perf_config_tmp}
72 perf config trace.show_arg_names=false trace.show_duration=false \
73 trace.show_timestamp=false trace.args_alignment=0
74}
75
76skip_if_no_perf_trace || exit 2
77check_vmlinux || exit 2
78[ "$(id -u)" = 0 ] || exit 2
79
80trace_config
81
82trace_test_string
83
84if [ $err = 0 ]; then
85 trace_test_buffer
86fi
87
88if [ $err = 0 ]; then
89 trace_test_struct_btf
90fi
91
92cleanup
93
94exit $err