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git.ipfire.org Git - thirdparty/systemd.git/blob - src/test/test-util.c
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1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 Copyright 2013 Thomas H.P. Andersen
14 #include "parse-util.h"
15 #include "process-util.h"
16 #include "raw-clone.h"
18 #include "string-util.h"
21 static void test_align_power2(void) {
24 assert_se(ALIGN_POWER2(0) == 0);
25 assert_se(ALIGN_POWER2(1) == 1);
26 assert_se(ALIGN_POWER2(2) == 2);
27 assert_se(ALIGN_POWER2(3) == 4);
28 assert_se(ALIGN_POWER2(12) == 16);
30 assert_se(ALIGN_POWER2(ULONG_MAX
) == 0);
31 assert_se(ALIGN_POWER2(ULONG_MAX
- 1) == 0);
32 assert_se(ALIGN_POWER2(ULONG_MAX
- 1024) == 0);
33 assert_se(ALIGN_POWER2(ULONG_MAX
/ 2) == ULONG_MAX
/ 2 + 1);
34 assert_se(ALIGN_POWER2(ULONG_MAX
+ 1) == 0);
36 for (i
= 1; i
< 131071; ++i
) {
37 for (p2
= 1; p2
< i
; p2
<<= 1)
40 assert_se(ALIGN_POWER2(i
) == p2
);
43 for (i
= ULONG_MAX
- 1024; i
< ULONG_MAX
; ++i
) {
44 for (p2
= 1; p2
&& p2
< i
; p2
<<= 1)
47 assert_se(ALIGN_POWER2(i
) == p2
);
51 static void test_max(void) {
54 int b
[CONST_MAX(10, 100)];
56 .a
= CONST_MAX(10, 100),
60 assert_cc(sizeof(val1
.b
) == sizeof(int) * 100);
62 /* CONST_MAX returns (void) instead of a value if the passed arguments
63 * are not of the same type or not constant expressions. */
64 assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 10)), int));
65 assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 1U)), void));
67 assert_se(val1
.a
== 100);
68 assert_se(MAX(++d
, 0) == 1);
71 assert_cc(MAXSIZE(char[3], uint16_t) == 3);
72 assert_cc(MAXSIZE(char[3], uint32_t) == 4);
73 assert_cc(MAXSIZE(char, long) == sizeof(long));
75 assert_se(MAX(-5, 5) == 5);
76 assert_se(MAX(5, 5) == 5);
77 assert_se(MAX(MAX(1, MAX(2, MAX(3, 4))), 5) == 5);
78 assert_se(MAX(MAX(1, MAX(2, MAX(3, 2))), 1) == 3);
79 assert_se(MAX(MIN(1, MIN(2, MIN(3, 4))), 5) == 5);
80 assert_se(MAX(MAX(1, MIN(2, MIN(3, 2))), 1) == 2);
81 assert_se(LESS_BY(8, 4) == 4);
82 assert_se(LESS_BY(8, 8) == 0);
83 assert_se(LESS_BY(4, 8) == 0);
84 assert_se(LESS_BY(16, LESS_BY(8, 4)) == 12);
85 assert_se(LESS_BY(4, LESS_BY(8, 4)) == 0);
86 assert_se(CLAMP(-5, 0, 1) == 0);
87 assert_se(CLAMP(5, 0, 1) == 1);
88 assert_se(CLAMP(5, -10, 1) == 1);
89 assert_se(CLAMP(5, -10, 10) == 5);
90 assert_se(CLAMP(CLAMP(0, -10, 10), CLAMP(-5, 10, 20), CLAMP(100, -5, 20)) == 10);
93 #pragma GCC diagnostic push
95 # pragma GCC diagnostic ignored "-Waddress-of-packed-member"
98 static void test_container_of(void) {
104 } _packed_ myval
= { };
106 assert_cc(sizeof(myval
) == 17);
107 assert_se(container_of(&myval
.v1
, struct mytype
, v1
) == &myval
);
108 assert_se(container_of(&myval
.v2
, struct mytype
, v2
) == &myval
);
109 assert_se(container_of(&container_of(&myval
.v2
,
116 #pragma GCC diagnostic pop
118 static void test_div_round_up(void) {
122 assert_se(DIV_ROUND_UP(0, 8) == 0);
123 assert_se(DIV_ROUND_UP(1, 8) == 1);
124 assert_se(DIV_ROUND_UP(8, 8) == 1);
125 assert_se(DIV_ROUND_UP(12, 8) == 2);
126 assert_se(DIV_ROUND_UP(16, 8) == 2);
128 /* test multiple evaluation */
130 assert_se(DIV_ROUND_UP(div
++, 8) == 0 && div
== 1);
131 assert_se(DIV_ROUND_UP(++div
, 8) == 1 && div
== 2);
132 assert_se(DIV_ROUND_UP(8, div
++) == 4 && div
== 3);
133 assert_se(DIV_ROUND_UP(8, ++div
) == 2 && div
== 4);
135 /* overflow test with exact division */
136 assert_se(sizeof(0U) == 4);
137 assert_se(0xfffffffaU
% 10U == 0U);
138 assert_se(0xfffffffaU
/ 10U == 429496729U);
139 assert_se(DIV_ROUND_UP(0xfffffffaU
, 10U) == 429496729U);
140 assert_se((0xfffffffaU
+ 10U - 1U) / 10U == 0U);
141 assert_se(0xfffffffaU
/ 10U + !!(0xfffffffaU
% 10U) == 429496729U);
143 /* overflow test with rounded division */
144 assert_se(0xfffffffdU
% 10U == 3U);
145 assert_se(0xfffffffdU
/ 10U == 429496729U);
146 assert_se(DIV_ROUND_UP(0xfffffffdU
, 10U) == 429496730U);
147 assert_se((0xfffffffdU
+ 10U - 1U) / 10U == 0U);
148 assert_se(0xfffffffdU
/ 10U + !!(0xfffffffdU
% 10U) == 429496730U);
151 static void test_u64log2(void) {
152 assert_se(u64log2(0) == 0);
153 assert_se(u64log2(8) == 3);
154 assert_se(u64log2(9) == 3);
155 assert_se(u64log2(15) == 3);
156 assert_se(u64log2(16) == 4);
157 assert_se(u64log2(1024*1024) == 20);
158 assert_se(u64log2(1024*1024+5) == 20);
161 static void test_protect_errno(void) {
167 assert_se(errno
== 12);
170 static void test_in_set(void) {
171 assert_se(IN_SET(1, 1));
172 assert_se(IN_SET(1, 1, 2, 3, 4));
173 assert_se(IN_SET(2, 1, 2, 3, 4));
174 assert_se(IN_SET(3, 1, 2, 3, 4));
175 assert_se(IN_SET(4, 1, 2, 3, 4));
176 assert_se(!IN_SET(0, 1));
177 assert_se(!IN_SET(0, 1, 2, 3, 4));
180 static void test_log2i(void) {
181 assert_se(log2i(1) == 0);
182 assert_se(log2i(2) == 1);
183 assert_se(log2i(3) == 1);
184 assert_se(log2i(4) == 2);
185 assert_se(log2i(32) == 5);
186 assert_se(log2i(33) == 5);
187 assert_se(log2i(63) == 5);
188 assert_se(log2i(INT_MAX
) == sizeof(int)*8-2);
191 static void test_raw_clone(void) {
192 pid_t parent
, pid
, pid2
;
195 log_info("before clone: getpid()→"PID_FMT
, parent
);
196 assert_se(raw_getpid() == parent
);
202 log_info("raw_clone: "PID_FMT
" getpid()→"PID_FMT
" raw_getpid()→"PID_FMT
,
203 pid
, getpid(), pid2
);
205 assert_se(pid2
!= parent
);
210 assert_se(pid2
== parent
);
211 waitpid(pid
, &status
, __WCLONE
);
212 assert_se(WIFEXITED(status
) && WEXITSTATUS(status
) == EXIT_SUCCESS
);
216 assert_se(raw_clone(CLONE_FS
|CLONE_NEWNS
) == -1);
217 assert_se(errno
== EINVAL
);
220 static void test_physical_memory(void) {
222 char buf
[FORMAT_BYTES_MAX
];
224 p
= physical_memory();
226 assert_se(p
< UINT64_MAX
);
227 assert_se(p
% page_size() == 0);
229 log_info("Memory: %s (%" PRIu64
")", format_bytes(buf
, sizeof(buf
), p
), p
);
232 static void test_physical_memory_scale(void) {
235 p
= physical_memory();
237 assert_se(physical_memory_scale(0, 100) == 0);
238 assert_se(physical_memory_scale(100, 100) == p
);
240 log_info("Memory original: %" PRIu64
, physical_memory());
241 log_info("Memory scaled by 50%%: %" PRIu64
, physical_memory_scale(50, 100));
242 log_info("Memory divided by 2: %" PRIu64
, physical_memory() / 2);
243 log_info("Page size: %zu", page_size());
245 /* There might be an uneven number of pages, hence permit these calculations to be half a page off... */
246 assert_se(page_size()/2 + physical_memory_scale(50, 100) - p
/2 <= page_size());
247 assert_se(physical_memory_scale(200, 100) == p
*2);
249 assert_se(physical_memory_scale(0, 1) == 0);
250 assert_se(physical_memory_scale(1, 1) == p
);
251 assert_se(physical_memory_scale(2, 1) == p
*2);
253 assert_se(physical_memory_scale(0, 2) == 0);
255 assert_se(page_size()/2 + physical_memory_scale(1, 2) - p
/2 <= page_size());
256 assert_se(physical_memory_scale(2, 2) == p
);
257 assert_se(physical_memory_scale(4, 2) == p
*2);
259 assert_se(physical_memory_scale(0, UINT32_MAX
) == 0);
260 assert_se(physical_memory_scale(UINT32_MAX
, UINT32_MAX
) == p
);
263 assert_se(physical_memory_scale(UINT64_MAX
/4, UINT64_MAX
) == UINT64_MAX
);
266 static void test_system_tasks_max(void) {
269 t
= system_tasks_max();
271 assert_se(t
< UINT64_MAX
);
273 log_info("Max tasks: %" PRIu64
, t
);
276 static void test_system_tasks_max_scale(void) {
279 t
= system_tasks_max();
281 assert_se(system_tasks_max_scale(0, 100) == 0);
282 assert_se(system_tasks_max_scale(100, 100) == t
);
284 assert_se(system_tasks_max_scale(0, 1) == 0);
285 assert_se(system_tasks_max_scale(1, 1) == t
);
286 assert_se(system_tasks_max_scale(2, 1) == 2*t
);
288 assert_se(system_tasks_max_scale(0, 2) == 0);
289 assert_se(system_tasks_max_scale(1, 2) == t
/2);
290 assert_se(system_tasks_max_scale(2, 2) == t
);
291 assert_se(system_tasks_max_scale(3, 2) == (3*t
)/2);
292 assert_se(system_tasks_max_scale(4, 2) == t
*2);
294 assert_se(system_tasks_max_scale(0, UINT32_MAX
) == 0);
295 assert_se(system_tasks_max_scale((UINT32_MAX
-1)/2, UINT32_MAX
-1) == t
/2);
296 assert_se(system_tasks_max_scale(UINT32_MAX
, UINT32_MAX
) == t
);
300 assert_se(system_tasks_max_scale(UINT64_MAX
/4, UINT64_MAX
) == UINT64_MAX
);
303 int main(int argc
, char *argv
[]) {
304 log_parse_environment();
312 test_protect_errno();
316 test_physical_memory();
317 test_physical_memory_scale();
318 test_system_tasks_max();
319 test_system_tasks_max_scale();