tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#!/bin/bash
2# test perf probe of function from different CU
3# SPDX-License-Identifier: GPL-2.0
4
5set -e
6
7# Skip if there's no probe command.
8if ! perf | grep probe
9then
10 echo "Skip: probe command isn't present"
11 exit 2
12fi
13
14# skip if there's no gcc
15if ! [ -x "$(command -v gcc)" ]; then
16 echo "failed: no gcc compiler"
17 exit 2
18fi
19
20temp_dir=$(mktemp -d /tmp/perf-uprobe-different-cu-sh.XXXXXXXXXX)
21
22cleanup()
23{
24 trap - EXIT TERM INT
25 if [[ "${temp_dir}" =~ ^/tmp/perf-uprobe-different-cu-sh.*$ ]]; then
26 echo "--- Cleaning up ---"
27 perf probe -x ${temp_dir}/testfile -d foo || true
28 rm -f "${temp_dir}/"*
29 rmdir "${temp_dir}"
30 fi
31}
32
33trap_cleanup()
34{
35 cleanup
36 exit 1
37}
38
39trap trap_cleanup EXIT TERM INT
40
41cat > ${temp_dir}/testfile-foo.h << EOF
42struct t
43{
44 int *p;
45 int c;
46};
47
48extern int foo (int i, struct t *t);
49EOF
50
51cat > ${temp_dir}/testfile-foo.c << EOF
52#include "testfile-foo.h"
53
54int
55foo (int i, struct t *t)
56{
57 int j, res = 0;
58 for (j = 0; j < i && j < t->c; j++)
59 res += t->p[j];
60
61 return res;
62}
63EOF
64
65cat > ${temp_dir}/testfile-main.c << EOF
66#include "testfile-foo.h"
67
68static struct t g;
69
70int
71main (int argc, char **argv)
72{
73 int i;
74 int j[argc];
75 g.c = argc;
76 g.p = j;
77 for (i = 0; i < argc; i++)
78 j[i] = (int) argv[i][0];
79 return foo (3, &g);
80}
81EOF
82
83gcc -g -Og -flto -c ${temp_dir}/testfile-foo.c -o ${temp_dir}/testfile-foo.o
84gcc -g -Og -c ${temp_dir}/testfile-main.c -o ${temp_dir}/testfile-main.o
85gcc -g -Og -o ${temp_dir}/testfile ${temp_dir}/testfile-foo.o ${temp_dir}/testfile-main.o
86
87perf probe -x ${temp_dir}/testfile --funcs foo | grep "foo"
88perf probe -x ${temp_dir}/testfile foo
89
90cleanup