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 "fileio.h"
   9 #include "fs-util.h"
  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"
  16 #include "rm-rf.h"
  17 #include "string-util.h"
  18 #include "tests.h"
  19 #include "util.h"
  20
  21 static void test_align_power2(void) {
  22         unsigned long i, p2;
  23
  24         log_info("/* %s */", __func__);
  25
  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);
  31
  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);
  37
  38         for (i = 1; i < 131071; ++i) {
  39                 for (p2 = 1; p2 < i; p2 <<= 1)
  40                         /* empty */ ;
  41
  42                 assert_se(ALIGN_POWER2(i) == p2);
  43         }
  44
  45         for (i = ULONG_MAX - 1024; i < ULONG_MAX; ++i) {
  46                 for (p2 = 1; p2 && p2 < i; p2 <<= 1)
  47                         /* empty */ ;
  48
  49                 assert_se(ALIGN_POWER2(i) == p2);
  50         }
  51 }
  52
  53 static void test_max(void) {
  54         static const struct {
  55                 int a;
  56                 int b[CONST_MAX(10, 100)];
  57         } val1 = {
  58                 .a = CONST_MAX(10, 100),
  59         };
  60         int d = 0;
  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];
  67
  68         log_info("/* %s */", __func__);
  69
  70         assert_cc(sizeof(val1.b) == sizeof(int) * 100);
  71
  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));
  76
  77         assert_se(val1.a == 100);
  78         assert_se(MAX(++d, 0) == 1);
  79         assert_se(d == 1);
  80
  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));
  84
  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);
 130 }
 131
 132 #pragma GCC diagnostic push
 133 #ifdef __clang__
 134 #  pragma GCC diagnostic ignored "-Waddress-of-packed-member"
 135 #endif
 136
 137 static void test_container_of(void) {
 138         struct mytype {
 139                 uint8_t pad1[3];
 140                 uint64_t v1;
 141                 uint8_t pad2[2];
 142                 uint32_t v2;
 143         } myval = { };
 144
 145         log_info("/* %s */", __func__);
 146
 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,
 151                                              struct mytype,
 152                                              v2)->v1,
 153                                struct mytype,
 154                                v1) == &myval);
 155 }
 156
 157 #pragma GCC diagnostic pop
 158
 159 static void test_div_round_up(void) {
 160         int div;
 161
 162         log_info("/* %s */", __func__);
 163
 164         /* basic tests */
 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);
 170
 171         /* test multiple evaluation */
 172         div = 0;
 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);
 177
 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);
 185
 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);
 192 }
 193
 194 static void test_u64log2(void) {
 195         log_info("/* %s */", __func__);
 196
 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);
 204 }
 205
 206 static void test_protect_errno(void) {
 207         log_info("/* %s */", __func__);
 208
 209         errno = 12;
 210         {
 211                 PROTECT_ERRNO;
 212                 errno = 11;
 213         }
 214         assert_se(errno == 12);
 215 }
 216
 217 static void test_unprotect_errno_inner_function(void) {
 218         PROTECT_ERRNO;
 219
 220         errno = 2222;
 221 }
 222
 223 static void test_unprotect_errno(void) {
 224         log_info("/* %s */", __func__);
 225
 226         errno = 4711;
 227
 228         PROTECT_ERRNO;
 229
 230         errno = 815;
 231
 232         UNPROTECT_ERRNO;
 233
 234         assert_se(errno == 4711);
 235
 236         test_unprotect_errno_inner_function();
 237
 238         assert_se(errno == 4711);
 239 }
 240
 241 static void test_in_set(void) {
 242         log_info("/* %s */", __func__);
 243
 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));
 251 }
 252
 253 static void test_log2i(void) {
 254         log_info("/* %s */", __func__);
 255
 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);
 264 }
 265
 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};
 271
 272         log_info("/* %s */", __func__);
 273
 274         assert_se(eqzero(zeros));
 275         assert_se(!eqzero(ones));
 276         assert_se(!eqzero(mixed));
 277         assert_se(!eqzero(longer));
 278 }
 279
 280 static void test_raw_clone(void) {
 281         pid_t parent, pid, pid2;
 282
 283         log_info("/* %s */", __func__);
 284
 285         parent = getpid();
 286         log_info("before clone: getpid()→"PID_FMT, parent);
 287         assert_se(raw_getpid() == parent);
 288
 289         pid = raw_clone(0);
 290         assert_se(pid >= 0);
 291
 292         pid2 = raw_getpid();
 293         log_info("raw_clone: "PID_FMT" getpid()→"PID_FMT" raw_getpid()→"PID_FMT,
 294                  pid, getpid(), pid2);
 295         if (pid == 0) {
 296                 assert_se(pid2 != parent);
 297                 _exit(EXIT_SUCCESS);
 298         } else {
 299                 int status;
 300
 301                 assert_se(pid2 == parent);
 302                 waitpid(pid, &status, __WCLONE);
 303                 assert_se(WIFEXITED(status) && WEXITSTATUS(status) == EXIT_SUCCESS);
 304         }
 305
 306         errno = 0;
 307         assert_se(raw_clone(CLONE_FS|CLONE_NEWNS) == -1);
 308         assert_se(errno == EINVAL);
 309 }
 310
 311 static void test_physical_memory(void) {
 312         uint64_t p;
 313         char buf[FORMAT_BYTES_MAX];
 314
 315         log_info("/* %s */", __func__);
 316
 317         p = physical_memory();
 318         assert_se(p > 0);
 319         assert_se(p < UINT64_MAX);
 320         assert_se(p % page_size() == 0);
 321
 322         log_info("Memory: %s (%" PRIu64 ")", format_bytes(buf, sizeof(buf), p), p);
 323 }
 324
 325 static void test_physical_memory_scale(void) {
 326         uint64_t p;
 327
 328         log_info("/* %s */", __func__);
 329
 330         p = physical_memory();
 331
 332         assert_se(physical_memory_scale(0, 100) == 0);
 333         assert_se(physical_memory_scale(100, 100) == p);
 334
 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());
 339
 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);
 343
 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);
 347
 348         assert_se(physical_memory_scale(0, 2) == 0);
 349
 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);
 353
 354         assert_se(physical_memory_scale(0, UINT32_MAX) == 0);
 355         assert_se(physical_memory_scale(UINT32_MAX, UINT32_MAX) == p);
 356
 357         /* overflow */
 358         assert_se(physical_memory_scale(UINT64_MAX/4, UINT64_MAX) == UINT64_MAX);
 359 }
 360
 361 static void test_system_tasks_max(void) {
 362         uint64_t t;
 363
 364         log_info("/* %s */", __func__);
 365
 366         t = system_tasks_max();
 367         assert_se(t > 0);
 368         assert_se(t < UINT64_MAX);
 369
 370         log_info("Max tasks: %" PRIu64, t);
 371 }
 372
 373 static void test_system_tasks_max_scale(void) {
 374         uint64_t t;
 375
 376         log_info("/* %s */", __func__);
 377
 378         t = system_tasks_max();
 379
 380         assert_se(system_tasks_max_scale(0, 100) == 0);
 381         assert_se(system_tasks_max_scale(100, 100) == t);
 382
 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);
 386
 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);
 392
 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);
 396
 397         /* overflow */
 398
 399         assert_se(system_tasks_max_scale(UINT64_MAX/4, UINT64_MAX) == UINT64_MAX);
 400 }
 401
 402 int main(int argc, char *argv[]) {
 403         test_setup_logging(LOG_INFO);
 404
 405         test_align_power2();
 406         test_max();
 407         test_container_of();
 408         test_div_round_up();
 409         test_u64log2();
 410         test_protect_errno();
 411         test_unprotect_errno();
 412         test_in_set();
 413         test_log2i();
 414         test_eqzero();
 415         test_raw_clone();
 416         test_physical_memory();
 417         test_physical_memory_scale();
 418         test_system_tasks_max();
 419         test_system_tasks_max_scale();
 420
 421         return 0;
 422 }