1 /* SPDX-License-Identifier: LGPL-2.1+ */
11 #include "parse-util.h"
12 #include "process-util.h"
13 #include "raw-clone.h"
15 #include "string-util.h"
18 static void test_align_power2(void) {
21 assert_se(ALIGN_POWER2(0) == 0);
22 assert_se(ALIGN_POWER2(1) == 1);
23 assert_se(ALIGN_POWER2(2) == 2);
24 assert_se(ALIGN_POWER2(3) == 4);
25 assert_se(ALIGN_POWER2(12) == 16);
27 assert_se(ALIGN_POWER2(ULONG_MAX) == 0);
28 assert_se(ALIGN_POWER2(ULONG_MAX - 1) == 0);
29 assert_se(ALIGN_POWER2(ULONG_MAX - 1024) == 0);
30 assert_se(ALIGN_POWER2(ULONG_MAX / 2) == ULONG_MAX / 2 + 1);
31 assert_se(ALIGN_POWER2(ULONG_MAX + 1) == 0);
33 for (i = 1; i < 131071; ++i) {
34 for (p2 = 1; p2 < i; p2 <<= 1)
37 assert_se(ALIGN_POWER2(i) == p2);
40 for (i = ULONG_MAX - 1024; i < ULONG_MAX; ++i) {
41 for (p2 = 1; p2 && p2 < i; p2 <<= 1)
44 assert_se(ALIGN_POWER2(i) == p2);
48 static void test_max(void) {
51 int b[CONST_MAX(10, 100)];
53 .a = CONST_MAX(10, 100),
57 assert_cc(sizeof(val1.b) == sizeof(int) * 100);
59 /* CONST_MAX returns (void) instead of a value if the passed arguments
60 * are not of the same type or not constant expressions. */
61 assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 10)), int));
62 assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 1U)), void));
64 assert_se(val1.a == 100);
65 assert_se(MAX(++d, 0) == 1);
68 assert_cc(MAXSIZE(char[3], uint16_t) == 3);
69 assert_cc(MAXSIZE(char[3], uint32_t) == 4);
70 assert_cc(MAXSIZE(char, long) == sizeof(long));
72 assert_se(MAX(-5, 5) == 5);
73 assert_se(MAX(5, 5) == 5);
74 assert_se(MAX(MAX(1, MAX(2, MAX(3, 4))), 5) == 5);
75 assert_se(MAX(MAX(1, MAX(2, MAX(3, 2))), 1) == 3);
76 assert_se(MAX(MIN(1, MIN(2, MIN(3, 4))), 5) == 5);
77 assert_se(MAX(MAX(1, MIN(2, MIN(3, 2))), 1) == 2);
78 assert_se(LESS_BY(8, 4) == 4);
79 assert_se(LESS_BY(8, 8) == 0);
80 assert_se(LESS_BY(4, 8) == 0);
81 assert_se(LESS_BY(16, LESS_BY(8, 4)) == 12);
82 assert_se(LESS_BY(4, LESS_BY(8, 4)) == 0);
83 assert_se(CLAMP(-5, 0, 1) == 0);
84 assert_se(CLAMP(5, 0, 1) == 1);
85 assert_se(CLAMP(5, -10, 1) == 1);
86 assert_se(CLAMP(5, -10, 10) == 5);
87 assert_se(CLAMP(CLAMP(0, -10, 10), CLAMP(-5, 10, 20), CLAMP(100, -5, 20)) == 10);
90 #pragma GCC diagnostic push
92 # pragma GCC diagnostic ignored "-Waddress-of-packed-member"
95 static void test_container_of(void) {
101 } _packed_ myval = { };
103 assert_cc(sizeof(myval) == 17);
104 assert_se(container_of(&myval.v1, struct mytype, v1) == &myval);
105 assert_se(container_of(&myval.v2, struct mytype, v2) == &myval);
106 assert_se(container_of(&container_of(&myval.v2,
113 #pragma GCC diagnostic pop
115 static void test_div_round_up(void) {
119 assert_se(DIV_ROUND_UP(0, 8) == 0);
120 assert_se(DIV_ROUND_UP(1, 8) == 1);
121 assert_se(DIV_ROUND_UP(8, 8) == 1);
122 assert_se(DIV_ROUND_UP(12, 8) == 2);
123 assert_se(DIV_ROUND_UP(16, 8) == 2);
125 /* test multiple evaluation */
127 assert_se(DIV_ROUND_UP(div++, 8) == 0 && div == 1);
128 assert_se(DIV_ROUND_UP(++div, 8) == 1 && div == 2);
129 assert_se(DIV_ROUND_UP(8, div++) == 4 && div == 3);
130 assert_se(DIV_ROUND_UP(8, ++div) == 2 && div == 4);
132 /* overflow test with exact division */
133 assert_se(sizeof(0U) == 4);
134 assert_se(0xfffffffaU % 10U == 0U);
135 assert_se(0xfffffffaU / 10U == 429496729U);
136 assert_se(DIV_ROUND_UP(0xfffffffaU, 10U) == 429496729U);
137 assert_se((0xfffffffaU + 10U - 1U) / 10U == 0U);
138 assert_se(0xfffffffaU / 10U + !!(0xfffffffaU % 10U) == 429496729U);
140 /* overflow test with rounded division */
141 assert_se(0xfffffffdU % 10U == 3U);
142 assert_se(0xfffffffdU / 10U == 429496729U);
143 assert_se(DIV_ROUND_UP(0xfffffffdU, 10U) == 429496730U);
144 assert_se((0xfffffffdU + 10U - 1U) / 10U == 0U);
145 assert_se(0xfffffffdU / 10U + !!(0xfffffffdU % 10U) == 429496730U);
148 static void test_u64log2(void) {
149 assert_se(u64log2(0) == 0);
150 assert_se(u64log2(8) == 3);
151 assert_se(u64log2(9) == 3);
152 assert_se(u64log2(15) == 3);
153 assert_se(u64log2(16) == 4);
154 assert_se(u64log2(1024*1024) == 20);
155 assert_se(u64log2(1024*1024+5) == 20);
158 static void test_protect_errno(void) {
164 assert_se(errno == 12);
167 static void test_in_set(void) {
168 assert_se(IN_SET(1, 1));
169 assert_se(IN_SET(1, 1, 2, 3, 4));
170 assert_se(IN_SET(2, 1, 2, 3, 4));
171 assert_se(IN_SET(3, 1, 2, 3, 4));
172 assert_se(IN_SET(4, 1, 2, 3, 4));
173 assert_se(!IN_SET(0, 1));
174 assert_se(!IN_SET(0, 1, 2, 3, 4));
177 static void test_log2i(void) {
178 assert_se(log2i(1) == 0);
179 assert_se(log2i(2) == 1);
180 assert_se(log2i(3) == 1);
181 assert_se(log2i(4) == 2);
182 assert_se(log2i(32) == 5);
183 assert_se(log2i(33) == 5);
184 assert_se(log2i(63) == 5);
185 assert_se(log2i(INT_MAX) == sizeof(int)*8-2);
188 #if 0 /// UNNEEDED by elogind
189 static void test_raw_clone(void) {
190 pid_t parent, pid, pid2;
193 log_info("before clone: getpid()→"PID_FMT, parent);
194 assert_se(raw_getpid() == parent);
200 log_info("raw_clone: "PID_FMT" getpid()→"PID_FMT" raw_getpid()→"PID_FMT,
201 pid, getpid(), pid2);
203 assert_se(pid2 != parent);
208 assert_se(pid2 == parent);
209 waitpid(pid, &status, __WCLONE);
210 assert_se(WIFEXITED(status) && WEXITSTATUS(status) == EXIT_SUCCESS);
214 assert_se(raw_clone(CLONE_FS|CLONE_NEWNS) == -1);
215 assert_se(errno == EINVAL);
219 static void test_physical_memory(void) {
221 char buf[FORMAT_BYTES_MAX];
223 p = physical_memory();
225 assert_se(p < UINT64_MAX);
226 assert_se(p % page_size() == 0);
228 log_info("Memory: %s (%" PRIu64 ")", format_bytes(buf, sizeof(buf), p), p);
231 static void test_physical_memory_scale(void) {
234 p = physical_memory();
236 assert_se(physical_memory_scale(0, 100) == 0);
237 assert_se(physical_memory_scale(100, 100) == p);
239 log_info("Memory original: %" PRIu64, physical_memory());
240 log_info("Memory scaled by 50%%: %" PRIu64, physical_memory_scale(50, 100));
241 log_info("Memory divided by 2: %" PRIu64, physical_memory() / 2);
242 log_info("Page size: %zu", page_size());
244 /* There might be an uneven number of pages, hence permit these calculations to be half a page off... */
245 assert_se(page_size()/2 + physical_memory_scale(50, 100) - p/2 <= page_size());
246 assert_se(physical_memory_scale(200, 100) == p*2);
248 assert_se(physical_memory_scale(0, 1) == 0);
249 assert_se(physical_memory_scale(1, 1) == p);
250 assert_se(physical_memory_scale(2, 1) == p*2);
252 assert_se(physical_memory_scale(0, 2) == 0);
254 assert_se(page_size()/2 + physical_memory_scale(1, 2) - p/2 <= page_size());
255 assert_se(physical_memory_scale(2, 2) == p);
256 assert_se(physical_memory_scale(4, 2) == p*2);
258 assert_se(physical_memory_scale(0, UINT32_MAX) == 0);
259 assert_se(physical_memory_scale(UINT32_MAX, UINT32_MAX) == p);
262 assert_se(physical_memory_scale(UINT64_MAX/4, UINT64_MAX) == UINT64_MAX);
265 static void test_system_tasks_max(void) {
268 t = system_tasks_max();
270 assert_se(t < UINT64_MAX);
272 log_info("Max tasks: %" PRIu64, t);
275 static void test_system_tasks_max_scale(void) {
278 t = system_tasks_max();
280 assert_se(system_tasks_max_scale(0, 100) == 0);
281 assert_se(system_tasks_max_scale(100, 100) == t);
283 assert_se(system_tasks_max_scale(0, 1) == 0);
284 assert_se(system_tasks_max_scale(1, 1) == t);
285 assert_se(system_tasks_max_scale(2, 1) == 2*t);
287 assert_se(system_tasks_max_scale(0, 2) == 0);
288 assert_se(system_tasks_max_scale(1, 2) == t/2);
289 assert_se(system_tasks_max_scale(2, 2) == t);
290 assert_se(system_tasks_max_scale(3, 2) == (3*t)/2);
291 assert_se(system_tasks_max_scale(4, 2) == t*2);
293 assert_se(system_tasks_max_scale(0, UINT32_MAX) == 0);
294 assert_se(system_tasks_max_scale((UINT32_MAX-1)/2, UINT32_MAX-1) == t/2);
295 assert_se(system_tasks_max_scale(UINT32_MAX, UINT32_MAX) == t);
299 assert_se(system_tasks_max_scale(UINT64_MAX/4, UINT64_MAX) == UINT64_MAX);
302 int main(int argc, char *argv[]) {
303 log_parse_environment();
311 test_protect_errno();
314 #if 0 /// UNNEEDED by elogind
317 test_physical_memory();
318 test_physical_memory_scale();
319 test_system_tasks_max();
320 test_system_tasks_max_scale();