Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * User Events Dyn Events Test Program
4 *
5 * Copyright (c) 2021 Beau Belgrave <beaub@linux.microsoft.com>
6 */
7
8#include <errno.h>
9#include <linux/user_events.h>
10#include <stdio.h>
11#include <stdlib.h>
12#include <fcntl.h>
13#include <sys/ioctl.h>
14#include <sys/stat.h>
15#include <unistd.h>
16
17#include "../kselftest_harness.h"
18
19const char *dyn_file = "/sys/kernel/debug/tracing/dynamic_events";
20const char *clear = "!u:__test_event";
21
22static int Append(const char *value)
23{
24 int fd = open(dyn_file, O_RDWR | O_APPEND);
25 int ret = write(fd, value, strlen(value));
26
27 close(fd);
28 return ret;
29}
30
31#define CLEAR() \
32do { \
33 int ret = Append(clear); \
34 if (ret == -1) \
35 ASSERT_EQ(ENOENT, errno); \
36} while (0)
37
38#define TEST_PARSE(x) \
39do { \
40 ASSERT_NE(-1, Append(x)); \
41 CLEAR(); \
42} while (0)
43
44#define TEST_NPARSE(x) ASSERT_EQ(-1, Append(x))
45
46FIXTURE(user) {
47};
48
49FIXTURE_SETUP(user) {
50 CLEAR();
51}
52
53FIXTURE_TEARDOWN(user) {
54 CLEAR();
55}
56
57TEST_F(user, basic_types) {
58 /* All should work */
59 TEST_PARSE("u:__test_event u64 a");
60 TEST_PARSE("u:__test_event u32 a");
61 TEST_PARSE("u:__test_event u16 a");
62 TEST_PARSE("u:__test_event u8 a");
63 TEST_PARSE("u:__test_event char a");
64 TEST_PARSE("u:__test_event unsigned char a");
65 TEST_PARSE("u:__test_event int a");
66 TEST_PARSE("u:__test_event unsigned int a");
67 TEST_PARSE("u:__test_event short a");
68 TEST_PARSE("u:__test_event unsigned short a");
69 TEST_PARSE("u:__test_event char[20] a");
70 TEST_PARSE("u:__test_event unsigned char[20] a");
71 TEST_PARSE("u:__test_event char[0x14] a");
72 TEST_PARSE("u:__test_event unsigned char[0x14] a");
73 /* Bad size format should fail */
74 TEST_NPARSE("u:__test_event char[aa] a");
75 /* Large size should fail */
76 TEST_NPARSE("u:__test_event char[9999] a");
77 /* Long size string should fail */
78 TEST_NPARSE("u:__test_event char[0x0000000000001] a");
79}
80
81TEST_F(user, loc_types) {
82 /* All should work */
83 TEST_PARSE("u:__test_event __data_loc char[] a");
84 TEST_PARSE("u:__test_event __data_loc unsigned char[] a");
85 TEST_PARSE("u:__test_event __rel_loc char[] a");
86 TEST_PARSE("u:__test_event __rel_loc unsigned char[] a");
87}
88
89TEST_F(user, size_types) {
90 /* Should work */
91 TEST_PARSE("u:__test_event struct custom a 20");
92 /* Size not specified on struct should fail */
93 TEST_NPARSE("u:__test_event struct custom a");
94 /* Size specified on non-struct should fail */
95 TEST_NPARSE("u:__test_event char a 20");
96}
97
98TEST_F(user, flags) {
99 /* Should work */
100 TEST_PARSE("u:__test_event:BPF_ITER u32 a");
101 /* Forward compat */
102 TEST_PARSE("u:__test_event:BPF_ITER,FLAG_FUTURE u32 a");
103}
104
105TEST_F(user, matching) {
106 /* Register */
107 ASSERT_NE(-1, Append("u:__test_event struct custom a 20"));
108 /* Should not match */
109 TEST_NPARSE("!u:__test_event struct custom b");
110 /* Should match */
111 TEST_PARSE("!u:__test_event struct custom a");
112 /* Multi field reg */
113 ASSERT_NE(-1, Append("u:__test_event u32 a; u32 b"));
114 /* Non matching cases */
115 TEST_NPARSE("!u:__test_event u32 a");
116 TEST_NPARSE("!u:__test_event u32 b");
117 TEST_NPARSE("!u:__test_event u32 a; u32 ");
118 TEST_NPARSE("!u:__test_event u32 a; u32 a");
119 /* Matching case */
120 TEST_PARSE("!u:__test_event u32 a; u32 b");
121 /* Register */
122 ASSERT_NE(-1, Append("u:__test_event u32 a; u32 b"));
123 /* Ensure trailing semi-colon case */
124 TEST_PARSE("!u:__test_event u32 a; u32 b;");
125}
126
127int main(int argc, char **argv)
128{
129 return test_harness_run(argc, argv);
130}