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git.ipfire.org Git - thirdparty/systemd.git/blob - src/test/test-util.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
9 #include "limits-util.h"
10 #include "memory-util.h"
11 #include "missing_syscall.h"
12 #include "parse-util.h"
13 #include "process-util.h"
14 #include "raw-clone.h"
16 #include "string-util.h"
20 static void test_align_power2(void) {
23 log_info("/* %s */", __func__
);
25 assert_se(ALIGN_POWER2(0) == 0);
26 assert_se(ALIGN_POWER2(1) == 1);
27 assert_se(ALIGN_POWER2(2) == 2);
28 assert_se(ALIGN_POWER2(3) == 4);
29 assert_se(ALIGN_POWER2(4) == 4);
30 assert_se(ALIGN_POWER2(5) == 8);
31 assert_se(ALIGN_POWER2(6) == 8);
32 assert_se(ALIGN_POWER2(7) == 8);
33 assert_se(ALIGN_POWER2(9) == 16);
34 assert_se(ALIGN_POWER2(10) == 16);
35 assert_se(ALIGN_POWER2(11) == 16);
36 assert_se(ALIGN_POWER2(12) == 16);
37 assert_se(ALIGN_POWER2(13) == 16);
38 assert_se(ALIGN_POWER2(14) == 16);
39 assert_se(ALIGN_POWER2(15) == 16);
40 assert_se(ALIGN_POWER2(16) == 16);
41 assert_se(ALIGN_POWER2(17) == 32);
43 assert_se(ALIGN_POWER2(ULONG_MAX
) == 0);
44 assert_se(ALIGN_POWER2(ULONG_MAX
- 1) == 0);
45 assert_se(ALIGN_POWER2(ULONG_MAX
- 1024) == 0);
46 assert_se(ALIGN_POWER2(ULONG_MAX
/ 2) == ULONG_MAX
/ 2 + 1);
47 assert_se(ALIGN_POWER2(ULONG_MAX
+ 1) == 0);
49 for (i
= 1; i
< 131071; ++i
) {
50 for (p2
= 1; p2
< i
; p2
<<= 1)
53 assert_se(ALIGN_POWER2(i
) == p2
);
56 for (i
= ULONG_MAX
- 1024; i
< ULONG_MAX
; ++i
) {
57 for (p2
= 1; p2
&& p2
< i
; p2
<<= 1)
60 assert_se(ALIGN_POWER2(i
) == p2
);
64 static void test_max(void) {
67 int b
[CONST_MAX(10, 100)];
69 .a
= CONST_MAX(10, 100),
72 unsigned long x
= 12345;
73 unsigned long y
= 54321;
74 const char str
[] = "a_string_constant";
75 const unsigned long long arr
[] = {9999ULL, 10ULL, 0ULL, 3000ULL, 2000ULL, 1000ULL, 100ULL, 9999999ULL};
76 void *p
= (void *)str
;
77 void *q
= (void *)&str
[16];
79 log_info("/* %s */", __func__
);
81 assert_cc(sizeof(val1
.b
) == sizeof(int) * 100);
83 /* CONST_MAX returns (void) instead of a value if the passed arguments
84 * are not of the same type or not constant expressions. */
85 assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 10)), int));
86 assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 1U)), void));
88 assert_se(val1
.a
== 100);
89 assert_se(MAX(++d
, 0) == 1);
92 assert_cc(MAXSIZE(char[3], uint16_t) == 3);
93 assert_cc(MAXSIZE(char[3], uint32_t) == 4);
94 assert_cc(MAXSIZE(char, long) == sizeof(long));
96 assert_se(MAX(-5, 5) == 5);
97 assert_se(MAX(5, 5) == 5);
98 assert_se(MAX(MAX(1, MAX(2, MAX(3, 4))), 5) == 5);
99 assert_se(MAX(MAX(1, MAX(2, MAX(3, 2))), 1) == 3);
100 assert_se(MAX(MIN(1, MIN(2, MIN(3, 4))), 5) == 5);
101 assert_se(MAX(MAX(1, MIN(2, MIN(3, 2))), 1) == 2);
102 assert_se(LESS_BY(8, 4) == 4);
103 assert_se(LESS_BY(8, 8) == 0);
104 assert_se(LESS_BY(4, 8) == 0);
105 assert_se(LESS_BY(16, LESS_BY(8, 4)) == 12);
106 assert_se(LESS_BY(4, LESS_BY(8, 4)) == 0);
107 assert_se(CMP(3, 5) == -1);
108 assert_se(CMP(5, 3) == 1);
109 assert_se(CMP(5, 5) == 0);
110 assert_se(CMP(x
, y
) == -1);
111 assert_se(CMP(y
, x
) == 1);
112 assert_se(CMP(x
, x
) == 0);
113 assert_se(CMP(y
, y
) == 0);
114 assert_se(CMP(UINT64_MAX
, (uint64_t) 0) == 1);
115 assert_se(CMP((uint64_t) 0, UINT64_MAX
) == -1);
116 assert_se(CMP(UINT64_MAX
, UINT64_MAX
) == 0);
117 assert_se(CMP(INT64_MIN
, INT64_MAX
) == -1);
118 assert_se(CMP(INT64_MAX
, INT64_MIN
) == 1);
119 assert_se(CMP(INT64_MAX
, INT64_MAX
) == 0);
120 assert_se(CMP(INT64_MIN
, INT64_MIN
) == 0);
121 assert_se(CMP(INT64_MAX
, (int64_t) 0) == 1);
122 assert_se(CMP((int64_t) 0, INT64_MIN
) == 1);
123 assert_se(CMP(INT64_MIN
, (int64_t) 0) == -1);
124 assert_se(CMP((int64_t) 0, INT64_MAX
) == -1);
125 assert_se(CMP(&str
[2], &str
[7]) == -1);
126 assert_se(CMP(&str
[2], &str
[2]) == 0);
127 assert_se(CMP(&str
[7], (const char *)str
) == 1);
128 assert_se(CMP(str
[2], str
[7]) == 1);
129 assert_se(CMP(str
[7], *str
) == 1);
130 assert_se(CMP((const unsigned long long *)arr
, &arr
[3]) == -1);
131 assert_se(CMP(*arr
, arr
[3]) == 1);
132 assert_se(CMP(p
, q
) == -1);
133 assert_se(CMP(q
, p
) == 1);
134 assert_se(CMP(p
, p
) == 0);
135 assert_se(CMP(q
, q
) == 0);
136 assert_se(CLAMP(-5, 0, 1) == 0);
137 assert_se(CLAMP(5, 0, 1) == 1);
138 assert_se(CLAMP(5, -10, 1) == 1);
139 assert_se(CLAMP(5, -10, 10) == 5);
140 assert_se(CLAMP(CLAMP(0, -10, 10), CLAMP(-5, 10, 20), CLAMP(100, -5, 20)) == 10);
143 #pragma GCC diagnostic push
145 # pragma GCC diagnostic ignored "-Waddress-of-packed-member"
148 static void test_container_of(void) {
156 log_info("/* %s */", __func__
);
158 assert_cc(sizeof(myval
) >= 17);
159 assert_se(container_of(&myval
.v1
, struct mytype
, v1
) == &myval
);
160 assert_se(container_of(&myval
.v2
, struct mytype
, v2
) == &myval
);
161 assert_se(container_of(&container_of(&myval
.v2
,
168 #pragma GCC diagnostic pop
170 static void test_div_round_up(void) {
173 log_info("/* %s */", __func__
);
176 assert_se(DIV_ROUND_UP(0, 8) == 0);
177 assert_se(DIV_ROUND_UP(1, 8) == 1);
178 assert_se(DIV_ROUND_UP(8, 8) == 1);
179 assert_se(DIV_ROUND_UP(12, 8) == 2);
180 assert_se(DIV_ROUND_UP(16, 8) == 2);
182 /* test multiple evaluation */
184 assert_se(DIV_ROUND_UP(div
++, 8) == 0 && div
== 1);
185 assert_se(DIV_ROUND_UP(++div
, 8) == 1 && div
== 2);
186 assert_se(DIV_ROUND_UP(8, div
++) == 4 && div
== 3);
187 assert_se(DIV_ROUND_UP(8, ++div
) == 2 && div
== 4);
189 /* overflow test with exact division */
190 assert_se(sizeof(0U) == 4);
191 assert_se(0xfffffffaU
% 10U == 0U);
192 assert_se(0xfffffffaU
/ 10U == 429496729U);
193 assert_se(DIV_ROUND_UP(0xfffffffaU
, 10U) == 429496729U);
194 assert_se((0xfffffffaU
+ 10U - 1U) / 10U == 0U);
195 assert_se(0xfffffffaU
/ 10U + !!(0xfffffffaU
% 10U) == 429496729U);
197 /* overflow test with rounded division */
198 assert_se(0xfffffffdU
% 10U == 3U);
199 assert_se(0xfffffffdU
/ 10U == 429496729U);
200 assert_se(DIV_ROUND_UP(0xfffffffdU
, 10U) == 429496730U);
201 assert_se((0xfffffffdU
+ 10U - 1U) / 10U == 0U);
202 assert_se(0xfffffffdU
/ 10U + !!(0xfffffffdU
% 10U) == 429496730U);
205 static void test_u64log2(void) {
206 log_info("/* %s */", __func__
);
208 assert_se(u64log2(0) == 0);
209 assert_se(u64log2(8) == 3);
210 assert_se(u64log2(9) == 3);
211 assert_se(u64log2(15) == 3);
212 assert_se(u64log2(16) == 4);
213 assert_se(u64log2(1024*1024) == 20);
214 assert_se(u64log2(1024*1024+5) == 20);
217 static void test_protect_errno(void) {
218 log_info("/* %s */", __func__
);
225 assert_se(errno
== 12);
228 static void test_unprotect_errno_inner_function(void) {
234 static void test_unprotect_errno(void) {
235 log_info("/* %s */", __func__
);
245 assert_se(errno
== 4711);
247 test_unprotect_errno_inner_function();
249 assert_se(errno
== 4711);
252 static void test_in_set(void) {
253 log_info("/* %s */", __func__
);
255 assert_se(IN_SET(1, 1));
256 assert_se(IN_SET(1, 1, 2, 3, 4));
257 assert_se(IN_SET(2, 1, 2, 3, 4));
258 assert_se(IN_SET(3, 1, 2, 3, 4));
259 assert_se(IN_SET(4, 1, 2, 3, 4));
260 assert_se(!IN_SET(0, 1));
261 assert_se(!IN_SET(0, 1, 2, 3, 4));
264 static void test_log2i(void) {
265 log_info("/* %s */", __func__
);
267 assert_se(log2i(1) == 0);
268 assert_se(log2i(2) == 1);
269 assert_se(log2i(3) == 1);
270 assert_se(log2i(4) == 2);
271 assert_se(log2i(32) == 5);
272 assert_se(log2i(33) == 5);
273 assert_se(log2i(63) == 5);
274 assert_se(log2i(INT_MAX
) == sizeof(int)*8-2);
277 static void test_eqzero(void) {
278 const uint32_t zeros
[] = {0, 0, 0};
279 const uint32_t ones
[] = {1, 1};
280 const uint32_t mixed
[] = {0, 1, 0, 0, 0};
281 const uint8_t longer
[] = {[55] = 255};
283 log_info("/* %s */", __func__
);
285 assert_se(eqzero(zeros
));
286 assert_se(!eqzero(ones
));
287 assert_se(!eqzero(mixed
));
288 assert_se(!eqzero(longer
));
291 static void test_raw_clone(void) {
292 pid_t parent
, pid
, pid2
;
294 log_info("/* %s */", __func__
);
297 log_info("before clone: getpid()→"PID_FMT
, parent
);
298 assert_se(raw_getpid() == parent
);
304 log_info("raw_clone: "PID_FMT
" getpid()→"PID_FMT
" raw_getpid()→"PID_FMT
,
305 pid
, getpid(), pid2
);
307 assert_se(pid2
!= parent
);
312 assert_se(pid2
== parent
);
313 waitpid(pid
, &status
, __WCLONE
);
314 assert_se(WIFEXITED(status
) && WEXITSTATUS(status
) == EXIT_SUCCESS
);
318 assert_se(raw_clone(CLONE_FS
|CLONE_NEWNS
) == -1);
319 assert_se(errno
== EINVAL
);
322 static void test_physical_memory(void) {
324 char buf
[FORMAT_BYTES_MAX
];
326 log_info("/* %s */", __func__
);
328 p
= physical_memory();
330 assert_se(p
< UINT64_MAX
);
331 assert_se(p
% page_size() == 0);
333 log_info("Memory: %s (%" PRIu64
")", format_bytes(buf
, sizeof(buf
), p
), p
);
336 static void test_physical_memory_scale(void) {
339 log_info("/* %s */", __func__
);
341 p
= physical_memory();
343 assert_se(physical_memory_scale(0, 100) == 0);
344 assert_se(physical_memory_scale(100, 100) == p
);
346 log_info("Memory original: %" PRIu64
, physical_memory());
347 log_info("Memory scaled by 50%%: %" PRIu64
, physical_memory_scale(50, 100));
348 log_info("Memory divided by 2: %" PRIu64
, physical_memory() / 2);
349 log_info("Page size: %zu", page_size());
351 /* There might be an uneven number of pages, hence permit these calculations to be half a page off... */
352 assert_se(page_size()/2 + physical_memory_scale(50, 100) - p
/2 <= page_size());
353 assert_se(physical_memory_scale(200, 100) == p
*2);
355 assert_se(physical_memory_scale(0, 1) == 0);
356 assert_se(physical_memory_scale(1, 1) == p
);
357 assert_se(physical_memory_scale(2, 1) == p
*2);
359 assert_se(physical_memory_scale(0, 2) == 0);
361 assert_se(page_size()/2 + physical_memory_scale(1, 2) - p
/2 <= page_size());
362 assert_se(physical_memory_scale(2, 2) == p
);
363 assert_se(physical_memory_scale(4, 2) == p
*2);
365 assert_se(physical_memory_scale(0, UINT32_MAX
) == 0);
366 assert_se(physical_memory_scale(UINT32_MAX
, UINT32_MAX
) == p
);
369 assert_se(physical_memory_scale(UINT64_MAX
/4, UINT64_MAX
) == UINT64_MAX
);
372 static void test_system_tasks_max(void) {
375 log_info("/* %s */", __func__
);
377 t
= system_tasks_max();
379 assert_se(t
< UINT64_MAX
);
381 log_info("Max tasks: %" PRIu64
, t
);
384 static void test_system_tasks_max_scale(void) {
387 log_info("/* %s */", __func__
);
389 t
= system_tasks_max();
391 assert_se(system_tasks_max_scale(0, 100) == 0);
392 assert_se(system_tasks_max_scale(100, 100) == t
);
394 assert_se(system_tasks_max_scale(0, 1) == 0);
395 assert_se(system_tasks_max_scale(1, 1) == t
);
396 assert_se(system_tasks_max_scale(2, 1) == 2*t
);
398 assert_se(system_tasks_max_scale(0, 2) == 0);
399 assert_se(system_tasks_max_scale(1, 2) == t
/2);
400 assert_se(system_tasks_max_scale(2, 2) == t
);
401 assert_se(system_tasks_max_scale(3, 2) == (3*t
)/2);
402 assert_se(system_tasks_max_scale(4, 2) == t
*2);
404 assert_se(system_tasks_max_scale(0, UINT32_MAX
) == 0);
405 assert_se(system_tasks_max_scale((UINT32_MAX
-1)/2, UINT32_MAX
-1) == t
/2);
406 assert_se(system_tasks_max_scale(UINT32_MAX
, UINT32_MAX
) == t
);
410 assert_se(system_tasks_max_scale(UINT64_MAX
/4, UINT64_MAX
) == UINT64_MAX
);
413 static void test_foreach_pointer(void) {
417 FOREACH_POINTER(i
, &a
, &b
, &c
) {
433 assert_not_reached("unexpected index");
442 FOREACH_POINTER(i
, &b
) {
450 FOREACH_POINTER(i
, NULL
, &c
, NULL
, &b
, NULL
, &a
, NULL
) {
454 assert_se(i
== NULL
);
462 assert_se(i
== NULL
);
470 assert_se(i
== NULL
);
478 assert_se(i
== NULL
);
482 assert_not_reached("unexpected index");
492 int main(int argc
, char *argv
[]) {
493 test_setup_logging(LOG_INFO
);
500 test_protect_errno();
501 test_unprotect_errno();
506 test_physical_memory();
507 test_physical_memory_scale();
508 test_system_tasks_max();
509 test_system_tasks_max_scale();
510 test_foreach_pointer();