src/test/test-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4 #include <string.h>
   5 #include <sys/wait.h>
   6 #include <unistd.h>
   7
   8 #include "def.h"
   9 #include "fileio.h"
  10 #include "fs-util.h"
  11 #include "missing_syscall.h"
  12 #include "parse-util.h"
  13 #include "process-util.h"
  14 #include "raw-clone.h"
  15 #include "rm-rf.h"
  16 #include "string-util.h"
  17 #include "tests.h"
  18 #include "util.h"
  19
  20 static void test_align_power2(void) {
  21         unsigned long i, p2;
  22
  23         log_info("/* %s */", __func__);
  24
  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(12) == 16);
  30
  31         assert_se(ALIGN_POWER2(ULONG_MAX) == 0);
  32         assert_se(ALIGN_POWER2(ULONG_MAX - 1) == 0);
  33         assert_se(ALIGN_POWER2(ULONG_MAX - 1024) == 0);
  34         assert_se(ALIGN_POWER2(ULONG_MAX / 2) == ULONG_MAX / 2 + 1);
  35         assert_se(ALIGN_POWER2(ULONG_MAX + 1) == 0);
  36
  37         for (i = 1; i < 131071; ++i) {
  38                 for (p2 = 1; p2 < i; p2 <<= 1)
  39                         /* empty */ ;
  40
  41                 assert_se(ALIGN_POWER2(i) == p2);
  42         }
  43
  44         for (i = ULONG_MAX - 1024; i < ULONG_MAX; ++i) {
  45                 for (p2 = 1; p2 && p2 < i; p2 <<= 1)
  46                         /* empty */ ;
  47
  48                 assert_se(ALIGN_POWER2(i) == p2);
  49         }
  50 }
  51
  52 static void test_max(void) {
  53         static const struct {
  54                 int a;
  55                 int b[CONST_MAX(10, 100)];
  56         } val1 = {
  57                 .a = CONST_MAX(10, 100),
  58         };
  59         int d = 0;
  60         unsigned long x = 12345;
  61         unsigned long y = 54321;
  62         const char str[] = "a_string_constant";
  63         const unsigned long long arr[] = {9999ULL, 10ULL, 0ULL, 3000ULL, 2000ULL, 1000ULL, 100ULL, 9999999ULL};
  64         void *p = (void *)str;
  65         void *q = (void *)&str[16];
  66
  67         log_info("/* %s */", __func__);
  68
  69         assert_cc(sizeof(val1.b) == sizeof(int) * 100);
  70
  71         /* CONST_MAX returns (void) instead of a value if the passed arguments
  72          * are not of the same type or not constant expressions. */
  73         assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 10)), int));
  74         assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 1U)), void));
  75
  76         assert_se(val1.a == 100);
  77         assert_se(MAX(++d, 0) == 1);
  78         assert_se(d == 1);
  79
  80         assert_cc(MAXSIZE(char[3], uint16_t) == 3);
  81         assert_cc(MAXSIZE(char[3], uint32_t) == 4);
  82         assert_cc(MAXSIZE(char, long) == sizeof(long));
  83
  84         assert_se(MAX(-5, 5) == 5);
  85         assert_se(MAX(5, 5) == 5);
  86         assert_se(MAX(MAX(1, MAX(2, MAX(3, 4))), 5) == 5);
  87         assert_se(MAX(MAX(1, MAX(2, MAX(3, 2))), 1) == 3);
  88         assert_se(MAX(MIN(1, MIN(2, MIN(3, 4))), 5) == 5);
  89         assert_se(MAX(MAX(1, MIN(2, MIN(3, 2))), 1) == 2);
  90         assert_se(LESS_BY(8, 4) == 4);
  91         assert_se(LESS_BY(8, 8) == 0);
  92         assert_se(LESS_BY(4, 8) == 0);
  93         assert_se(LESS_BY(16, LESS_BY(8, 4)) == 12);
  94         assert_se(LESS_BY(4, LESS_BY(8, 4)) == 0);
  95         assert_se(CMP(3, 5) == -1);
  96         assert_se(CMP(5, 3) == 1);
  97         assert_se(CMP(5, 5) == 0);
  98         assert_se(CMP(x, y) == -1);
  99         assert_se(CMP(y, x) == 1);
 100         assert_se(CMP(x, x) == 0);
 101         assert_se(CMP(y, y) == 0);
 102         assert_se(CMP(UINT64_MAX, (uint64_t) 0) == 1);
 103         assert_se(CMP((uint64_t) 0, UINT64_MAX) == -1);
 104         assert_se(CMP(UINT64_MAX, UINT64_MAX) == 0);
 105         assert_se(CMP(INT64_MIN, INT64_MAX) == -1);
 106         assert_se(CMP(INT64_MAX, INT64_MIN) == 1);
 107         assert_se(CMP(INT64_MAX, INT64_MAX) == 0);
 108         assert_se(CMP(INT64_MIN, INT64_MIN) == 0);
 109         assert_se(CMP(INT64_MAX, (int64_t) 0) == 1);
 110         assert_se(CMP((int64_t) 0, INT64_MIN) == 1);
 111         assert_se(CMP(INT64_MIN, (int64_t) 0) == -1);
 112         assert_se(CMP((int64_t) 0, INT64_MAX) == -1);
 113         assert_se(CMP(&str[2], &str[7]) == -1);
 114         assert_se(CMP(&str[2], &str[2]) == 0);
 115         assert_se(CMP(&str[7], (const char *)str) == 1);
 116         assert_se(CMP(str[2], str[7]) == 1);
 117         assert_se(CMP(str[7], *str) == 1);
 118         assert_se(CMP((const unsigned long long *)arr, &arr[3]) == -1);
 119         assert_se(CMP(*arr, arr[3]) == 1);
 120         assert_se(CMP(p, q) == -1);
 121         assert_se(CMP(q, p) == 1);
 122         assert_se(CMP(p, p) == 0);
 123         assert_se(CMP(q, q) == 0);
 124         assert_se(CLAMP(-5, 0, 1) == 0);
 125         assert_se(CLAMP(5, 0, 1) == 1);
 126         assert_se(CLAMP(5, -10, 1) == 1);
 127         assert_se(CLAMP(5, -10, 10) == 5);
 128         assert_se(CLAMP(CLAMP(0, -10, 10), CLAMP(-5, 10, 20), CLAMP(100, -5, 20)) == 10);
 129 }
 130
 131 #pragma GCC diagnostic push
 132 #ifdef __clang__
 133 #  pragma GCC diagnostic ignored "-Waddress-of-packed-member"
 134 #endif
 135
 136 static void test_container_of(void) {
 137         struct mytype {
 138                 uint8_t pad1[3];
 139                 uint64_t v1;
 140                 uint8_t pad2[2];
 141                 uint32_t v2;
 142         } myval = { };
 143
 144         log_info("/* %s */", __func__);
 145
 146         assert_cc(sizeof(myval) >= 17);
 147         assert_se(container_of(&myval.v1, struct mytype, v1) == &myval);
 148         assert_se(container_of(&myval.v2, struct mytype, v2) == &myval);
 149         assert_se(container_of(&container_of(&myval.v2,
 150                                              struct mytype,
 151                                              v2)->v1,
 152                                struct mytype,
 153                                v1) == &myval);
 154 }
 155
 156 #pragma GCC diagnostic pop
 157
 158 static void test_div_round_up(void) {
 159         int div;
 160
 161         log_info("/* %s */", __func__);
 162
 163         /* basic tests */
 164         assert_se(DIV_ROUND_UP(0, 8) == 0);
 165         assert_se(DIV_ROUND_UP(1, 8) == 1);
 166         assert_se(DIV_ROUND_UP(8, 8) == 1);
 167         assert_se(DIV_ROUND_UP(12, 8) == 2);
 168         assert_se(DIV_ROUND_UP(16, 8) == 2);
 169
 170         /* test multiple evaluation */
 171         div = 0;
 172         assert_se(DIV_ROUND_UP(div++, 8) == 0 && div == 1);
 173         assert_se(DIV_ROUND_UP(++div, 8) == 1 && div == 2);
 174         assert_se(DIV_ROUND_UP(8, div++) == 4 && div == 3);
 175         assert_se(DIV_ROUND_UP(8, ++div) == 2 && div == 4);
 176
 177         /* overflow test with exact division */
 178         assert_se(sizeof(0U) == 4);
 179         assert_se(0xfffffffaU % 10U == 0U);
 180         assert_se(0xfffffffaU / 10U == 429496729U);
 181         assert_se(DIV_ROUND_UP(0xfffffffaU, 10U) == 429496729U);
 182         assert_se((0xfffffffaU + 10U - 1U) / 10U == 0U);
 183         assert_se(0xfffffffaU / 10U + !!(0xfffffffaU % 10U) == 429496729U);
 184
 185         /* overflow test with rounded division */
 186         assert_se(0xfffffffdU % 10U == 3U);
 187         assert_se(0xfffffffdU / 10U == 429496729U);
 188         assert_se(DIV_ROUND_UP(0xfffffffdU, 10U) == 429496730U);
 189         assert_se((0xfffffffdU + 10U - 1U) / 10U == 0U);
 190         assert_se(0xfffffffdU / 10U + !!(0xfffffffdU % 10U) == 429496730U);
 191 }
 192
 193 static void test_u64log2(void) {
 194         log_info("/* %s */", __func__);
 195
 196         assert_se(u64log2(0) == 0);
 197         assert_se(u64log2(8) == 3);
 198         assert_se(u64log2(9) == 3);
 199         assert_se(u64log2(15) == 3);
 200         assert_se(u64log2(16) == 4);
 201         assert_se(u64log2(1024*1024) == 20);
 202         assert_se(u64log2(1024*1024+5) == 20);
 203 }
 204
 205 static void test_protect_errno(void) {
 206         log_info("/* %s */", __func__);
 207
 208         errno = 12;
 209         {
 210                 PROTECT_ERRNO;
 211                 errno = 11;
 212         }
 213         assert_se(errno == 12);
 214 }
 215
 216 static void test_unprotect_errno_inner_function(void) {
 217         PROTECT_ERRNO;
 218
 219         errno = 2222;
 220 }
 221
 222 static void test_unprotect_errno(void) {
 223         log_info("/* %s */", __func__);
 224
 225         errno = 4711;
 226
 227         PROTECT_ERRNO;
 228
 229         errno = 815;
 230
 231         UNPROTECT_ERRNO;
 232
 233         assert_se(errno == 4711);
 234
 235         test_unprotect_errno_inner_function();
 236
 237         assert_se(errno == 4711);
 238 }
 239
 240 static void test_in_set(void) {
 241         log_info("/* %s */", __func__);
 242
 243         assert_se(IN_SET(1, 1));
 244         assert_se(IN_SET(1, 1, 2, 3, 4));
 245         assert_se(IN_SET(2, 1, 2, 3, 4));
 246         assert_se(IN_SET(3, 1, 2, 3, 4));
 247         assert_se(IN_SET(4, 1, 2, 3, 4));
 248         assert_se(!IN_SET(0, 1));
 249         assert_se(!IN_SET(0, 1, 2, 3, 4));
 250 }
 251
 252 static void test_log2i(void) {
 253         log_info("/* %s */", __func__);
 254
 255         assert_se(log2i(1) == 0);
 256         assert_se(log2i(2) == 1);
 257         assert_se(log2i(3) == 1);
 258         assert_se(log2i(4) == 2);
 259         assert_se(log2i(32) == 5);
 260         assert_se(log2i(33) == 5);
 261         assert_se(log2i(63) == 5);
 262         assert_se(log2i(INT_MAX) == sizeof(int)*8-2);
 263 }
 264
 265 static void test_eqzero(void) {
 266         const uint32_t zeros[] = {0, 0, 0};
 267         const uint32_t ones[] = {1, 1};
 268         const uint32_t mixed[] = {0, 1, 0, 0, 0};
 269         const uint8_t longer[] = {[55] = 255};
 270
 271         log_info("/* %s */", __func__);
 272
 273         assert_se(eqzero(zeros));
 274         assert_se(!eqzero(ones));
 275         assert_se(!eqzero(mixed));
 276         assert_se(!eqzero(longer));
 277 }
 278
 279 static void test_raw_clone(void) {
 280         pid_t parent, pid, pid2;
 281
 282         log_info("/* %s */", __func__);
 283
 284         parent = getpid();
 285         log_info("before clone: getpid()→"PID_FMT, parent);
 286         assert_se(raw_getpid() == parent);
 287
 288         pid = raw_clone(0);
 289         assert_se(pid >= 0);
 290
 291         pid2 = raw_getpid();
 292         log_info("raw_clone: "PID_FMT" getpid()→"PID_FMT" raw_getpid()→"PID_FMT,
 293                  pid, getpid(), pid2);
 294         if (pid == 0) {
 295                 assert_se(pid2 != parent);
 296                 _exit(EXIT_SUCCESS);
 297         } else {
 298                 int status;
 299
 300                 assert_se(pid2 == parent);
 301                 waitpid(pid, &status, __WCLONE);
 302                 assert_se(WIFEXITED(status) && WEXITSTATUS(status) == EXIT_SUCCESS);
 303         }
 304
 305         errno = 0;
 306         assert_se(raw_clone(CLONE_FS|CLONE_NEWNS) == -1);
 307         assert_se(errno == EINVAL);
 308 }
 309
 310 static void test_physical_memory(void) {
 311         uint64_t p;
 312         char buf[FORMAT_BYTES_MAX];
 313
 314         log_info("/* %s */", __func__);
 315
 316         p = physical_memory();
 317         assert_se(p > 0);
 318         assert_se(p < UINT64_MAX);
 319         assert_se(p % page_size() == 0);
 320
 321         log_info("Memory: %s (%" PRIu64 ")", format_bytes(buf, sizeof(buf), p), p);
 322 }
 323
 324 static void test_physical_memory_scale(void) {
 325         uint64_t p;
 326
 327         log_info("/* %s */", __func__);
 328
 329         p = physical_memory();
 330
 331         assert_se(physical_memory_scale(0, 100) == 0);
 332         assert_se(physical_memory_scale(100, 100) == p);
 333
 334         log_info("Memory original: %" PRIu64, physical_memory());
 335         log_info("Memory scaled by 50%%: %" PRIu64, physical_memory_scale(50, 100));
 336         log_info("Memory divided by 2: %" PRIu64, physical_memory() / 2);
 337         log_info("Page size: %zu", page_size());
 338
 339         /* There might be an uneven number of pages, hence permit these calculations to be half a page off... */
 340         assert_se(page_size()/2 + physical_memory_scale(50, 100) - p/2 <= page_size());
 341         assert_se(physical_memory_scale(200, 100) == p*2);
 342
 343         assert_se(physical_memory_scale(0, 1) == 0);
 344         assert_se(physical_memory_scale(1, 1) == p);
 345         assert_se(physical_memory_scale(2, 1) == p*2);
 346
 347         assert_se(physical_memory_scale(0, 2) == 0);
 348
 349         assert_se(page_size()/2 + physical_memory_scale(1, 2) - p/2 <= page_size());
 350         assert_se(physical_memory_scale(2, 2) == p);
 351         assert_se(physical_memory_scale(4, 2) == p*2);
 352
 353         assert_se(physical_memory_scale(0, UINT32_MAX) == 0);
 354         assert_se(physical_memory_scale(UINT32_MAX, UINT32_MAX) == p);
 355
 356         /* overflow */
 357         assert_se(physical_memory_scale(UINT64_MAX/4, UINT64_MAX) == UINT64_MAX);
 358 }
 359
 360 static void test_system_tasks_max(void) {
 361         uint64_t t;
 362
 363         log_info("/* %s */", __func__);
 364
 365         t = system_tasks_max();
 366         assert_se(t > 0);
 367         assert_se(t < UINT64_MAX);
 368
 369         log_info("Max tasks: %" PRIu64, t);
 370 }
 371
 372 static void test_system_tasks_max_scale(void) {
 373         uint64_t t;
 374
 375         log_info("/* %s */", __func__);
 376
 377         t = system_tasks_max();
 378
 379         assert_se(system_tasks_max_scale(0, 100) == 0);
 380         assert_se(system_tasks_max_scale(100, 100) == t);
 381
 382         assert_se(system_tasks_max_scale(0, 1) == 0);
 383         assert_se(system_tasks_max_scale(1, 1) == t);
 384         assert_se(system_tasks_max_scale(2, 1) == 2*t);
 385
 386         assert_se(system_tasks_max_scale(0, 2) == 0);
 387         assert_se(system_tasks_max_scale(1, 2) == t/2);
 388         assert_se(system_tasks_max_scale(2, 2) == t);
 389         assert_se(system_tasks_max_scale(3, 2) == (3*t)/2);
 390         assert_se(system_tasks_max_scale(4, 2) == t*2);
 391
 392         assert_se(system_tasks_max_scale(0, UINT32_MAX) == 0);
 393         assert_se(system_tasks_max_scale((UINT32_MAX-1)/2, UINT32_MAX-1) == t/2);
 394         assert_se(system_tasks_max_scale(UINT32_MAX, UINT32_MAX) == t);
 395
 396         /* overflow */
 397
 398         assert_se(system_tasks_max_scale(UINT64_MAX/4, UINT64_MAX) == UINT64_MAX);
 399 }
 400
 401 int main(int argc, char *argv[]) {
 402         test_setup_logging(LOG_INFO);
 403
 404         test_align_power2();
 405         test_max();
 406         test_container_of();
 407         test_div_round_up();
 408         test_u64log2();
 409         test_protect_errno();
 410         test_unprotect_errno();
 411         test_in_set();
 412         test_log2i();
 413         test_eqzero();
 414         test_raw_clone();
 415         test_physical_memory();
 416         test_physical_memory_scale();
 417         test_system_tasks_max();
 418         test_system_tasks_max_scale();
 419
 420         return 0;
 421 }