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git.ipfire.org Git - thirdparty/systemd.git/blob - src/test/test-util.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
10 #include "limits-util.h"
11 #include "memory-util.h"
12 #include "missing_syscall.h"
13 #include "parse-util.h"
14 #include "process-util.h"
15 #include "raw-clone.h"
17 #include "string-util.h"
21 static void test_align_power2(void) {
24 log_info("/* %s */", __func__
);
26 assert_se(ALIGN_POWER2(0) == 0);
27 assert_se(ALIGN_POWER2(1) == 1);
28 assert_se(ALIGN_POWER2(2) == 2);
29 assert_se(ALIGN_POWER2(3) == 4);
30 assert_se(ALIGN_POWER2(12) == 16);
32 assert_se(ALIGN_POWER2(ULONG_MAX
) == 0);
33 assert_se(ALIGN_POWER2(ULONG_MAX
- 1) == 0);
34 assert_se(ALIGN_POWER2(ULONG_MAX
- 1024) == 0);
35 assert_se(ALIGN_POWER2(ULONG_MAX
/ 2) == ULONG_MAX
/ 2 + 1);
36 assert_se(ALIGN_POWER2(ULONG_MAX
+ 1) == 0);
38 for (i
= 1; i
< 131071; ++i
) {
39 for (p2
= 1; p2
< i
; p2
<<= 1)
42 assert_se(ALIGN_POWER2(i
) == p2
);
45 for (i
= ULONG_MAX
- 1024; i
< ULONG_MAX
; ++i
) {
46 for (p2
= 1; p2
&& p2
< i
; p2
<<= 1)
49 assert_se(ALIGN_POWER2(i
) == p2
);
53 static void test_max(void) {
56 int b
[CONST_MAX(10, 100)];
58 .a
= CONST_MAX(10, 100),
61 unsigned long x
= 12345;
62 unsigned long y
= 54321;
63 const char str
[] = "a_string_constant";
64 const unsigned long long arr
[] = {9999ULL, 10ULL, 0ULL, 3000ULL, 2000ULL, 1000ULL, 100ULL, 9999999ULL};
65 void *p
= (void *)str
;
66 void *q
= (void *)&str
[16];
68 log_info("/* %s */", __func__
);
70 assert_cc(sizeof(val1
.b
) == sizeof(int) * 100);
72 /* CONST_MAX returns (void) instead of a value if the passed arguments
73 * are not of the same type or not constant expressions. */
74 assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 10)), int));
75 assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 1U)), void));
77 assert_se(val1
.a
== 100);
78 assert_se(MAX(++d
, 0) == 1);
81 assert_cc(MAXSIZE(char[3], uint16_t) == 3);
82 assert_cc(MAXSIZE(char[3], uint32_t) == 4);
83 assert_cc(MAXSIZE(char, long) == sizeof(long));
85 assert_se(MAX(-5, 5) == 5);
86 assert_se(MAX(5, 5) == 5);
87 assert_se(MAX(MAX(1, MAX(2, MAX(3, 4))), 5) == 5);
88 assert_se(MAX(MAX(1, MAX(2, MAX(3, 2))), 1) == 3);
89 assert_se(MAX(MIN(1, MIN(2, MIN(3, 4))), 5) == 5);
90 assert_se(MAX(MAX(1, MIN(2, MIN(3, 2))), 1) == 2);
91 assert_se(LESS_BY(8, 4) == 4);
92 assert_se(LESS_BY(8, 8) == 0);
93 assert_se(LESS_BY(4, 8) == 0);
94 assert_se(LESS_BY(16, LESS_BY(8, 4)) == 12);
95 assert_se(LESS_BY(4, LESS_BY(8, 4)) == 0);
96 assert_se(CMP(3, 5) == -1);
97 assert_se(CMP(5, 3) == 1);
98 assert_se(CMP(5, 5) == 0);
99 assert_se(CMP(x
, y
) == -1);
100 assert_se(CMP(y
, x
) == 1);
101 assert_se(CMP(x
, x
) == 0);
102 assert_se(CMP(y
, y
) == 0);
103 assert_se(CMP(UINT64_MAX
, (uint64_t) 0) == 1);
104 assert_se(CMP((uint64_t) 0, UINT64_MAX
) == -1);
105 assert_se(CMP(UINT64_MAX
, UINT64_MAX
) == 0);
106 assert_se(CMP(INT64_MIN
, INT64_MAX
) == -1);
107 assert_se(CMP(INT64_MAX
, INT64_MIN
) == 1);
108 assert_se(CMP(INT64_MAX
, INT64_MAX
) == 0);
109 assert_se(CMP(INT64_MIN
, INT64_MIN
) == 0);
110 assert_se(CMP(INT64_MAX
, (int64_t) 0) == 1);
111 assert_se(CMP((int64_t) 0, INT64_MIN
) == 1);
112 assert_se(CMP(INT64_MIN
, (int64_t) 0) == -1);
113 assert_se(CMP((int64_t) 0, INT64_MAX
) == -1);
114 assert_se(CMP(&str
[2], &str
[7]) == -1);
115 assert_se(CMP(&str
[2], &str
[2]) == 0);
116 assert_se(CMP(&str
[7], (const char *)str
) == 1);
117 assert_se(CMP(str
[2], str
[7]) == 1);
118 assert_se(CMP(str
[7], *str
) == 1);
119 assert_se(CMP((const unsigned long long *)arr
, &arr
[3]) == -1);
120 assert_se(CMP(*arr
, arr
[3]) == 1);
121 assert_se(CMP(p
, q
) == -1);
122 assert_se(CMP(q
, p
) == 1);
123 assert_se(CMP(p
, p
) == 0);
124 assert_se(CMP(q
, q
) == 0);
125 assert_se(CLAMP(-5, 0, 1) == 0);
126 assert_se(CLAMP(5, 0, 1) == 1);
127 assert_se(CLAMP(5, -10, 1) == 1);
128 assert_se(CLAMP(5, -10, 10) == 5);
129 assert_se(CLAMP(CLAMP(0, -10, 10), CLAMP(-5, 10, 20), CLAMP(100, -5, 20)) == 10);
132 #pragma GCC diagnostic push
134 # pragma GCC diagnostic ignored "-Waddress-of-packed-member"
137 static void test_container_of(void) {
145 log_info("/* %s */", __func__
);
147 assert_cc(sizeof(myval
) >= 17);
148 assert_se(container_of(&myval
.v1
, struct mytype
, v1
) == &myval
);
149 assert_se(container_of(&myval
.v2
, struct mytype
, v2
) == &myval
);
150 assert_se(container_of(&container_of(&myval
.v2
,
157 #pragma GCC diagnostic pop
159 static void test_div_round_up(void) {
162 log_info("/* %s */", __func__
);
165 assert_se(DIV_ROUND_UP(0, 8) == 0);
166 assert_se(DIV_ROUND_UP(1, 8) == 1);
167 assert_se(DIV_ROUND_UP(8, 8) == 1);
168 assert_se(DIV_ROUND_UP(12, 8) == 2);
169 assert_se(DIV_ROUND_UP(16, 8) == 2);
171 /* test multiple evaluation */
173 assert_se(DIV_ROUND_UP(div
++, 8) == 0 && div
== 1);
174 assert_se(DIV_ROUND_UP(++div
, 8) == 1 && div
== 2);
175 assert_se(DIV_ROUND_UP(8, div
++) == 4 && div
== 3);
176 assert_se(DIV_ROUND_UP(8, ++div
) == 2 && div
== 4);
178 /* overflow test with exact division */
179 assert_se(sizeof(0U) == 4);
180 assert_se(0xfffffffaU
% 10U == 0U);
181 assert_se(0xfffffffaU
/ 10U == 429496729U);
182 assert_se(DIV_ROUND_UP(0xfffffffaU
, 10U) == 429496729U);
183 assert_se((0xfffffffaU
+ 10U - 1U) / 10U == 0U);
184 assert_se(0xfffffffaU
/ 10U + !!(0xfffffffaU
% 10U) == 429496729U);
186 /* overflow test with rounded division */
187 assert_se(0xfffffffdU
% 10U == 3U);
188 assert_se(0xfffffffdU
/ 10U == 429496729U);
189 assert_se(DIV_ROUND_UP(0xfffffffdU
, 10U) == 429496730U);
190 assert_se((0xfffffffdU
+ 10U - 1U) / 10U == 0U);
191 assert_se(0xfffffffdU
/ 10U + !!(0xfffffffdU
% 10U) == 429496730U);
194 static void test_u64log2(void) {
195 log_info("/* %s */", __func__
);
197 assert_se(u64log2(0) == 0);
198 assert_se(u64log2(8) == 3);
199 assert_se(u64log2(9) == 3);
200 assert_se(u64log2(15) == 3);
201 assert_se(u64log2(16) == 4);
202 assert_se(u64log2(1024*1024) == 20);
203 assert_se(u64log2(1024*1024+5) == 20);
206 static void test_protect_errno(void) {
207 log_info("/* %s */", __func__
);
214 assert_se(errno
== 12);
217 static void test_unprotect_errno_inner_function(void) {
223 static void test_unprotect_errno(void) {
224 log_info("/* %s */", __func__
);
234 assert_se(errno
== 4711);
236 test_unprotect_errno_inner_function();
238 assert_se(errno
== 4711);
241 static void test_in_set(void) {
242 log_info("/* %s */", __func__
);
244 assert_se(IN_SET(1, 1));
245 assert_se(IN_SET(1, 1, 2, 3, 4));
246 assert_se(IN_SET(2, 1, 2, 3, 4));
247 assert_se(IN_SET(3, 1, 2, 3, 4));
248 assert_se(IN_SET(4, 1, 2, 3, 4));
249 assert_se(!IN_SET(0, 1));
250 assert_se(!IN_SET(0, 1, 2, 3, 4));
253 static void test_log2i(void) {
254 log_info("/* %s */", __func__
);
256 assert_se(log2i(1) == 0);
257 assert_se(log2i(2) == 1);
258 assert_se(log2i(3) == 1);
259 assert_se(log2i(4) == 2);
260 assert_se(log2i(32) == 5);
261 assert_se(log2i(33) == 5);
262 assert_se(log2i(63) == 5);
263 assert_se(log2i(INT_MAX
) == sizeof(int)*8-2);
266 static void test_eqzero(void) {
267 const uint32_t zeros
[] = {0, 0, 0};
268 const uint32_t ones
[] = {1, 1};
269 const uint32_t mixed
[] = {0, 1, 0, 0, 0};
270 const uint8_t longer
[] = {[55] = 255};
272 log_info("/* %s */", __func__
);
274 assert_se(eqzero(zeros
));
275 assert_se(!eqzero(ones
));
276 assert_se(!eqzero(mixed
));
277 assert_se(!eqzero(longer
));
280 static void test_raw_clone(void) {
281 pid_t parent
, pid
, pid2
;
283 log_info("/* %s */", __func__
);
286 log_info("before clone: getpid()→"PID_FMT
, parent
);
287 assert_se(raw_getpid() == parent
);
293 log_info("raw_clone: "PID_FMT
" getpid()→"PID_FMT
" raw_getpid()→"PID_FMT
,
294 pid
, getpid(), pid2
);
296 assert_se(pid2
!= parent
);
301 assert_se(pid2
== parent
);
302 waitpid(pid
, &status
, __WCLONE
);
303 assert_se(WIFEXITED(status
) && WEXITSTATUS(status
) == EXIT_SUCCESS
);
307 assert_se(raw_clone(CLONE_FS
|CLONE_NEWNS
) == -1);
308 assert_se(errno
== EINVAL
);
311 static void test_physical_memory(void) {
313 char buf
[FORMAT_BYTES_MAX
];
315 log_info("/* %s */", __func__
);
317 p
= physical_memory();
319 assert_se(p
< UINT64_MAX
);
320 assert_se(p
% page_size() == 0);
322 log_info("Memory: %s (%" PRIu64
")", format_bytes(buf
, sizeof(buf
), p
), p
);
325 static void test_physical_memory_scale(void) {
328 log_info("/* %s */", __func__
);
330 p
= physical_memory();
332 assert_se(physical_memory_scale(0, 100) == 0);
333 assert_se(physical_memory_scale(100, 100) == p
);
335 log_info("Memory original: %" PRIu64
, physical_memory());
336 log_info("Memory scaled by 50%%: %" PRIu64
, physical_memory_scale(50, 100));
337 log_info("Memory divided by 2: %" PRIu64
, physical_memory() / 2);
338 log_info("Page size: %zu", page_size());
340 /* There might be an uneven number of pages, hence permit these calculations to be half a page off... */
341 assert_se(page_size()/2 + physical_memory_scale(50, 100) - p
/2 <= page_size());
342 assert_se(physical_memory_scale(200, 100) == p
*2);
344 assert_se(physical_memory_scale(0, 1) == 0);
345 assert_se(physical_memory_scale(1, 1) == p
);
346 assert_se(physical_memory_scale(2, 1) == p
*2);
348 assert_se(physical_memory_scale(0, 2) == 0);
350 assert_se(page_size()/2 + physical_memory_scale(1, 2) - p
/2 <= page_size());
351 assert_se(physical_memory_scale(2, 2) == p
);
352 assert_se(physical_memory_scale(4, 2) == p
*2);
354 assert_se(physical_memory_scale(0, UINT32_MAX
) == 0);
355 assert_se(physical_memory_scale(UINT32_MAX
, UINT32_MAX
) == p
);
358 assert_se(physical_memory_scale(UINT64_MAX
/4, UINT64_MAX
) == UINT64_MAX
);
361 static void test_system_tasks_max(void) {
364 log_info("/* %s */", __func__
);
366 t
= system_tasks_max();
368 assert_se(t
< UINT64_MAX
);
370 log_info("Max tasks: %" PRIu64
, t
);
373 static void test_system_tasks_max_scale(void) {
376 log_info("/* %s */", __func__
);
378 t
= system_tasks_max();
380 assert_se(system_tasks_max_scale(0, 100) == 0);
381 assert_se(system_tasks_max_scale(100, 100) == t
);
383 assert_se(system_tasks_max_scale(0, 1) == 0);
384 assert_se(system_tasks_max_scale(1, 1) == t
);
385 assert_se(system_tasks_max_scale(2, 1) == 2*t
);
387 assert_se(system_tasks_max_scale(0, 2) == 0);
388 assert_se(system_tasks_max_scale(1, 2) == t
/2);
389 assert_se(system_tasks_max_scale(2, 2) == t
);
390 assert_se(system_tasks_max_scale(3, 2) == (3*t
)/2);
391 assert_se(system_tasks_max_scale(4, 2) == t
*2);
393 assert_se(system_tasks_max_scale(0, UINT32_MAX
) == 0);
394 assert_se(system_tasks_max_scale((UINT32_MAX
-1)/2, UINT32_MAX
-1) == t
/2);
395 assert_se(system_tasks_max_scale(UINT32_MAX
, UINT32_MAX
) == t
);
399 assert_se(system_tasks_max_scale(UINT64_MAX
/4, UINT64_MAX
) == UINT64_MAX
);
402 int main(int argc
, char *argv
[]) {
403 test_setup_logging(LOG_INFO
);
410 test_protect_errno();
411 test_unprotect_errno();
416 test_physical_memory();
417 test_physical_memory_scale();
418 test_system_tasks_max();
419 test_system_tasks_max_scale();