tools/testing/selftests/nolibc/nolibc-test.c

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #define _GNU_SOURCE
   4 #define _LARGEFILE64_SOURCE
   5
   6 /* libc-specific include files
   7  * The program may be built in 3 ways:
   8  *   $(CC) -nostdlib -include /path/to/nolibc.h => NOLIBC already defined
   9  *   $(CC) -nostdlib -I/path/to/nolibc/sysroot  => _NOLIBC_* guards are present
  10  *   $(CC) with default libc                    => NOLIBC* never defined
  11  */
  12 #ifndef NOLIBC
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <string.h>
  16 #ifndef _NOLIBC_STDIO_H
  17 /* standard libcs need more includes */
  18 #include <sys/auxv.h>
  19 #include <sys/io.h>
  20 #include <sys/ioctl.h>
  21 #include <sys/mman.h>
  22 #include <sys/mount.h>
  23 #include <sys/prctl.h>
  24 #include <sys/reboot.h>
  25 #include <sys/stat.h>
  26 #include <sys/syscall.h>
  27 #include <sys/sysmacros.h>
  28 #include <sys/time.h>
  29 #include <sys/wait.h>
  30 #include <dirent.h>
  31 #include <errno.h>
  32 #include <fcntl.h>
  33 #include <poll.h>
  34 #include <sched.h>
  35 #include <signal.h>
  36 #include <stdarg.h>
  37 #include <stddef.h>
  38 #include <stdint.h>
  39 #include <unistd.h>
  40 #include <limits.h>
  41 #endif
  42 #endif
  43
  44 /* for the type of int_fast16_t and int_fast32_t, musl differs from glibc and nolibc */
  45 #define SINT_MAX_OF_TYPE(type) (((type)1 << (sizeof(type) * 8 - 2)) - (type)1 + ((type)1 << (sizeof(type) * 8 - 2)))
  46 #define SINT_MIN_OF_TYPE(type) (-SINT_MAX_OF_TYPE(type) - 1)
  47
  48 /* will be used to test initialization of environ */
  49 static char **test_envp;
  50
  51 /* will be used to test initialization of argv */
  52 static char **test_argv;
  53
  54 /* will be used to test initialization of argc */
  55 static int test_argc;
  56
  57 /* will be used by some test cases as readable file, please don't write it */
  58 static const char *argv0;
  59
  60 /* definition of a series of tests */
  61 struct test {
  62         const char *name;              /* test name */
  63         int (*func)(int min, int max); /* handler */
  64 };
  65
  66 #ifndef _NOLIBC_STDLIB_H
  67 char *itoa(int i)
  68 {
  69         static char buf[12];
  70         int ret;
  71
  72         ret = snprintf(buf, sizeof(buf), "%d", i);
  73         return (ret >= 0 && ret < sizeof(buf)) ? buf : "#err";
  74 }
  75 #endif
  76
  77 #define CASE_ERR(err) \
  78         case err: return #err
  79
  80 /* returns the error name (e.g. "ENOENT") for common errors, "SUCCESS" for 0,
  81  * or the decimal value for less common ones.
  82  */
  83 static const char *errorname(int err)
  84 {
  85         switch (err) {
  86         case 0: return "SUCCESS";
  87         CASE_ERR(EPERM);
  88         CASE_ERR(ENOENT);
  89         CASE_ERR(ESRCH);
  90         CASE_ERR(EINTR);
  91         CASE_ERR(EIO);
  92         CASE_ERR(ENXIO);
  93         CASE_ERR(E2BIG);
  94         CASE_ERR(ENOEXEC);
  95         CASE_ERR(EBADF);
  96         CASE_ERR(ECHILD);
  97         CASE_ERR(EAGAIN);
  98         CASE_ERR(ENOMEM);
  99         CASE_ERR(EACCES);
 100         CASE_ERR(EFAULT);
 101         CASE_ERR(ENOTBLK);
 102         CASE_ERR(EBUSY);
 103         CASE_ERR(EEXIST);
 104         CASE_ERR(EXDEV);
 105         CASE_ERR(ENODEV);
 106         CASE_ERR(ENOTDIR);
 107         CASE_ERR(EISDIR);
 108         CASE_ERR(EINVAL);
 109         CASE_ERR(ENFILE);
 110         CASE_ERR(EMFILE);
 111         CASE_ERR(ENOTTY);
 112         CASE_ERR(ETXTBSY);
 113         CASE_ERR(EFBIG);
 114         CASE_ERR(ENOSPC);
 115         CASE_ERR(ESPIPE);
 116         CASE_ERR(EROFS);
 117         CASE_ERR(EMLINK);
 118         CASE_ERR(EPIPE);
 119         CASE_ERR(EDOM);
 120         CASE_ERR(ERANGE);
 121         CASE_ERR(ENOSYS);
 122         CASE_ERR(EOVERFLOW);
 123         default:
 124                 return itoa(err);
 125         }
 126 }
 127
 128 static void putcharn(char c, size_t n)
 129 {
 130         char buf[64];
 131
 132         memset(buf, c, n);
 133         buf[n] = '\0';
 134         fputs(buf, stdout);
 135 }
 136
 137 enum RESULT {
 138         OK,
 139         FAIL,
 140         SKIPPED,
 141 };
 142
 143 static void result(int llen, enum RESULT r)
 144 {
 145         const char *msg;
 146
 147         if (r == OK)
 148                 msg = " [OK]";
 149         else if (r == SKIPPED)
 150                 msg = "[SKIPPED]";
 151         else
 152                 msg = "[FAIL]";
 153
 154         if (llen < 64)
 155                 putcharn(' ', 64 - llen);
 156         puts(msg);
 157 }
 158
 159 /* The tests below are intended to be used by the macroes, which evaluate
 160  * expression <expr>, print the status to stdout, and update the "ret"
 161  * variable to count failures. The functions themselves return the number
 162  * of failures, thus either 0 or 1.
 163  */
 164
 165 #define EXPECT_ZR(cond, expr)                           \
 166         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_zr(expr, llen); } while (0)
 167
 168 static __attribute__((unused))
 169 int expect_zr(int expr, int llen)
 170 {
 171         int ret = !(expr == 0);
 172
 173         llen += printf(" = %d ", expr);
 174         result(llen, ret ? FAIL : OK);
 175         return ret;
 176 }
 177
 178
 179 #define EXPECT_NZ(cond, expr, val)                      \
 180         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_nz(expr, llen; } while (0)
 181
 182 static __attribute__((unused))
 183 int expect_nz(int expr, int llen)
 184 {
 185         int ret = !(expr != 0);
 186
 187         llen += printf(" = %d ", expr);
 188         result(llen, ret ? FAIL : OK);
 189         return ret;
 190 }
 191
 192
 193 #define EXPECT_EQ(cond, expr, val)                              \
 194         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_eq(expr, llen, val); } while (0)
 195
 196 static __attribute__((unused))
 197 int expect_eq(uint64_t expr, int llen, uint64_t val)
 198 {
 199         int ret = !(expr == val);
 200
 201         llen += printf(" = %lld ", (long long)expr);
 202         result(llen, ret ? FAIL : OK);
 203         return ret;
 204 }
 205
 206
 207 #define EXPECT_NE(cond, expr, val)                              \
 208         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ne(expr, llen, val); } while (0)
 209
 210 static __attribute__((unused))
 211 int expect_ne(int expr, int llen, int val)
 212 {
 213         int ret = !(expr != val);
 214
 215         llen += printf(" = %d ", expr);
 216         result(llen, ret ? FAIL : OK);
 217         return ret;
 218 }
 219
 220
 221 #define EXPECT_GE(cond, expr, val)                              \
 222         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ge(expr, llen, val); } while (0)
 223
 224 static __attribute__((unused))
 225 int expect_ge(int expr, int llen, int val)
 226 {
 227         int ret = !(expr >= val);
 228
 229         llen += printf(" = %d ", expr);
 230         result(llen, ret ? FAIL : OK);
 231         return ret;
 232 }
 233
 234
 235 #define EXPECT_GT(cond, expr, val)                              \
 236         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_gt(expr, llen, val); } while (0)
 237
 238 static __attribute__((unused))
 239 int expect_gt(int expr, int llen, int val)
 240 {
 241         int ret = !(expr > val);
 242
 243         llen += printf(" = %d ", expr);
 244         result(llen, ret ? FAIL : OK);
 245         return ret;
 246 }
 247
 248
 249 #define EXPECT_LE(cond, expr, val)                              \
 250         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_le(expr, llen, val); } while (0)
 251
 252 static __attribute__((unused))
 253 int expect_le(int expr, int llen, int val)
 254 {
 255         int ret = !(expr <= val);
 256
 257         llen += printf(" = %d ", expr);
 258         result(llen, ret ? FAIL : OK);
 259         return ret;
 260 }
 261
 262
 263 #define EXPECT_LT(cond, expr, val)                              \
 264         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_lt(expr, llen, val); } while (0)
 265
 266 static __attribute__((unused))
 267 int expect_lt(int expr, int llen, int val)
 268 {
 269         int ret = !(expr < val);
 270
 271         llen += printf(" = %d ", expr);
 272         result(llen, ret ? FAIL : OK);
 273         return ret;
 274 }
 275
 276
 277 #define EXPECT_SYSZR(cond, expr)                                \
 278         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_syszr(expr, llen); } while (0)
 279
 280 static __attribute__((unused))
 281 int expect_syszr(int expr, int llen)
 282 {
 283         int ret = 0;
 284
 285         if (expr) {
 286                 ret = 1;
 287                 llen += printf(" = %d %s ", expr, errorname(errno));
 288                 result(llen, FAIL);
 289         } else {
 290                 llen += printf(" = %d ", expr);
 291                 result(llen, OK);
 292         }
 293         return ret;
 294 }
 295
 296
 297 #define EXPECT_SYSEQ(cond, expr, val)                           \
 298         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_syseq(expr, llen, val); } while (0)
 299
 300 static __attribute__((unused))
 301 int expect_syseq(int expr, int llen, int val)
 302 {
 303         int ret = 0;
 304
 305         if (expr != val) {
 306                 ret = 1;
 307                 llen += printf(" = %d %s ", expr, errorname(errno));
 308                 result(llen, FAIL);
 309         } else {
 310                 llen += printf(" = %d ", expr);
 311                 result(llen, OK);
 312         }
 313         return ret;
 314 }
 315
 316
 317 #define EXPECT_SYSNE(cond, expr, val)                           \
 318         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_sysne(expr, llen, val); } while (0)
 319
 320 static __attribute__((unused))
 321 int expect_sysne(int expr, int llen, int val)
 322 {
 323         int ret = 0;
 324
 325         if (expr == val) {
 326                 ret = 1;
 327                 llen += printf(" = %d %s ", expr, errorname(errno));
 328                 result(llen, FAIL);
 329         } else {
 330                 llen += printf(" = %d ", expr);
 331                 result(llen, OK);
 332         }
 333         return ret;
 334 }
 335
 336
 337 #define EXPECT_SYSER2(cond, expr, expret, experr1, experr2)             \
 338         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_syserr2(expr, expret, experr1, experr2, llen); } while (0)
 339
 340 #define EXPECT_SYSER(cond, expr, expret, experr)                        \
 341         EXPECT_SYSER2(cond, expr, expret, experr, 0)
 342
 343 static __attribute__((unused))
 344 int expect_syserr2(int expr, int expret, int experr1, int experr2, int llen)
 345 {
 346         int ret = 0;
 347         int _errno = errno;
 348
 349         llen += printf(" = %d %s ", expr, errorname(_errno));
 350         if (expr != expret || (_errno != experr1 && _errno != experr2)) {
 351                 ret = 1;
 352                 if (experr2 == 0)
 353                         llen += printf(" != (%d %s) ", expret, errorname(experr1));
 354                 else
 355                         llen += printf(" != (%d %s %s) ", expret, errorname(experr1), errorname(experr2));
 356                 result(llen, FAIL);
 357         } else {
 358                 result(llen, OK);
 359         }
 360         return ret;
 361 }
 362
 363
 364 #define EXPECT_PTRZR(cond, expr)                                \
 365         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrzr(expr, llen); } while (0)
 366
 367 static __attribute__((unused))
 368 int expect_ptrzr(const void *expr, int llen)
 369 {
 370         int ret = 0;
 371
 372         llen += printf(" = <%p> ", expr);
 373         if (expr) {
 374                 ret = 1;
 375                 result(llen, FAIL);
 376         } else {
 377                 result(llen, OK);
 378         }
 379         return ret;
 380 }
 381
 382
 383 #define EXPECT_PTRNZ(cond, expr)                                \
 384         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrnz(expr, llen); } while (0)
 385
 386 static __attribute__((unused))
 387 int expect_ptrnz(const void *expr, int llen)
 388 {
 389         int ret = 0;
 390
 391         llen += printf(" = <%p> ", expr);
 392         if (!expr) {
 393                 ret = 1;
 394                 result(llen, FAIL);
 395         } else {
 396                 result(llen, OK);
 397         }
 398         return ret;
 399 }
 400
 401 #define EXPECT_PTREQ(cond, expr, cmp)                           \
 402         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptreq(expr, llen, cmp); } while (0)
 403
 404 static __attribute__((unused))
 405 int expect_ptreq(const void *expr, int llen, const void *cmp)
 406 {
 407         int ret = 0;
 408
 409         llen += printf(" = <%p> ", expr);
 410         if (expr != cmp) {
 411                 ret = 1;
 412                 result(llen, FAIL);
 413         } else {
 414                 result(llen, OK);
 415         }
 416         return ret;
 417 }
 418
 419 #define EXPECT_PTRNE(cond, expr, cmp)                           \
 420         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrne(expr, llen, cmp); } while (0)
 421
 422 static __attribute__((unused))
 423 int expect_ptrne(const void *expr, int llen, const void *cmp)
 424 {
 425         int ret = 0;
 426
 427         llen += printf(" = <%p> ", expr);
 428         if (expr == cmp) {
 429                 ret = 1;
 430                 result(llen, FAIL);
 431         } else {
 432                 result(llen, OK);
 433         }
 434         return ret;
 435 }
 436
 437 #define EXPECT_PTRGE(cond, expr, cmp)                           \
 438         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrge(expr, llen, cmp); } while (0)
 439
 440 static __attribute__((unused))
 441 int expect_ptrge(const void *expr, int llen, const void *cmp)
 442 {
 443         int ret = !(expr >= cmp);
 444
 445         llen += printf(" = <%p> ", expr);
 446         result(llen, ret ? FAIL : OK);
 447         return ret;
 448 }
 449
 450 #define EXPECT_PTRGT(cond, expr, cmp)                           \
 451         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrgt(expr, llen, cmp); } while (0)
 452
 453 static __attribute__((unused))
 454 int expect_ptrgt(const void *expr, int llen, const void *cmp)
 455 {
 456         int ret = !(expr > cmp);
 457
 458         llen += printf(" = <%p> ", expr);
 459         result(llen, ret ? FAIL : OK);
 460         return ret;
 461 }
 462
 463
 464 #define EXPECT_PTRLE(cond, expr, cmp)                           \
 465         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrle(expr, llen, cmp); } while (0)
 466
 467 static __attribute__((unused))
 468 int expect_ptrle(const void *expr, int llen, const void *cmp)
 469 {
 470         int ret = !(expr <= cmp);
 471
 472         llen += printf(" = <%p> ", expr);
 473         result(llen, ret ? FAIL : OK);
 474         return ret;
 475 }
 476
 477
 478 #define EXPECT_PTRLT(cond, expr, cmp)                           \
 479         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrlt(expr, llen, cmp); } while (0)
 480
 481 static __attribute__((unused))
 482 int expect_ptrlt(const void *expr, int llen, const void *cmp)
 483 {
 484         int ret = !(expr < cmp);
 485
 486         llen += printf(" = <%p> ", expr);
 487         result(llen, ret ? FAIL : OK);
 488         return ret;
 489 }
 490
 491 #define EXPECT_PTRER2(cond, expr, expret, experr1, experr2)             \
 492         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrerr2(expr, expret, experr1, experr2, llen); } while (0)
 493
 494 #define EXPECT_PTRER(cond, expr, expret, experr)                        \
 495         EXPECT_PTRER2(cond, expr, expret, experr, 0)
 496
 497 static __attribute__((unused))
 498 int expect_ptrerr2(const void *expr, const void *expret, int experr1, int experr2, int llen)
 499 {
 500         int ret = 0;
 501         int _errno = errno;
 502
 503         llen += printf(" = <%p> %s ", expr, errorname(_errno));
 504         if (expr != expret || (_errno != experr1 && _errno != experr2)) {
 505                 ret = 1;
 506                 if (experr2 == 0)
 507                         llen += printf(" != (<%p> %s) ", expret, errorname(experr1));
 508                 else
 509                         llen += printf(" != (<%p> %s %s) ", expret, errorname(experr1), errorname(experr2));
 510                 result(llen, FAIL);
 511         } else {
 512                 result(llen, OK);
 513         }
 514         return ret;
 515 }
 516
 517 #define EXPECT_STRZR(cond, expr)                                \
 518         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strzr(expr, llen); } while (0)
 519
 520 static __attribute__((unused))
 521 int expect_strzr(const char *expr, int llen)
 522 {
 523         int ret = 0;
 524
 525         llen += printf(" = <%s> ", expr);
 526         if (expr) {
 527                 ret = 1;
 528                 result(llen, FAIL);
 529         } else {
 530                 result(llen, OK);
 531         }
 532         return ret;
 533 }
 534
 535
 536 #define EXPECT_STRNZ(cond, expr)                                \
 537         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strnz(expr, llen); } while (0)
 538
 539 static __attribute__((unused))
 540 int expect_strnz(const char *expr, int llen)
 541 {
 542         int ret = 0;
 543
 544         llen += printf(" = <%s> ", expr);
 545         if (!expr) {
 546                 ret = 1;
 547                 result(llen, FAIL);
 548         } else {
 549                 result(llen, OK);
 550         }
 551         return ret;
 552 }
 553
 554
 555 #define EXPECT_STREQ(cond, expr, cmp)                           \
 556         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_streq(expr, llen, cmp); } while (0)
 557
 558 static __attribute__((unused))
 559 int expect_streq(const char *expr, int llen, const char *cmp)
 560 {
 561         int ret = 0;
 562
 563         llen += printf(" = <%s> ", expr);
 564         if (strcmp(expr, cmp) != 0) {
 565                 ret = 1;
 566                 result(llen, FAIL);
 567         } else {
 568                 result(llen, OK);
 569         }
 570         return ret;
 571 }
 572
 573
 574 #define EXPECT_STRNE(cond, expr, cmp)                           \
 575         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strne(expr, llen, cmp); } while (0)
 576
 577 static __attribute__((unused))
 578 int expect_strne(const char *expr, int llen, const char *cmp)
 579 {
 580         int ret = 0;
 581
 582         llen += printf(" = <%s> ", expr);
 583         if (strcmp(expr, cmp) == 0) {
 584                 ret = 1;
 585                 result(llen, FAIL);
 586         } else {
 587                 result(llen, OK);
 588         }
 589         return ret;
 590 }
 591
 592
 593 /* declare tests based on line numbers. There must be exactly one test per line. */
 594 #define CASE_TEST(name) \
 595         case __LINE__: llen += printf("%d %s", test, #name);
 596
 597 int run_startup(int min, int max)
 598 {
 599         int test;
 600         int ret = 0;
 601         /* kernel at least passes HOME and TERM, shell passes more */
 602         int env_total = 2;
 603         /* checking NULL for argv/argv0, environ and _auxv is not enough, let's compare with sbrk(0) or &end */
 604         extern char end;
 605         char *brk = sbrk(0) != (void *)-1 ? sbrk(0) : &end;
 606         /* differ from nolibc, both glibc and musl have no global _auxv */
 607         const unsigned long *test_auxv = (void *)-1;
 608 #ifdef NOLIBC
 609         test_auxv = _auxv;
 610 #endif
 611
 612         for (test = min; test >= 0 && test <= max; test++) {
 613                 int llen = 0; /* line length */
 614
 615                 /* avoid leaving empty lines below, this will insert holes into
 616                  * test numbers.
 617                  */
 618                 switch (test + __LINE__ + 1) {
 619                 CASE_TEST(argc);             EXPECT_GE(1, test_argc, 1); break;
 620                 CASE_TEST(argv_addr);        EXPECT_PTRGT(1, test_argv, brk); break;
 621                 CASE_TEST(argv_environ);     EXPECT_PTRLT(1, test_argv, environ); break;
 622                 CASE_TEST(argv_total);       EXPECT_EQ(1, environ - test_argv - 1, test_argc ?: 1); break;
 623                 CASE_TEST(argv0_addr);       EXPECT_PTRGT(1, argv0, brk); break;
 624                 CASE_TEST(argv0_str);        EXPECT_STRNZ(1, argv0 > brk ? argv0 : NULL); break;
 625                 CASE_TEST(argv0_len);        EXPECT_GE(1,  argv0 > brk ? strlen(argv0) : 0, 1); break;
 626                 CASE_TEST(environ_addr);     EXPECT_PTRGT(1, environ, brk); break;
 627                 CASE_TEST(environ_envp);     EXPECT_PTREQ(1, environ, test_envp); break;
 628                 CASE_TEST(environ_auxv);     EXPECT_PTRLT(test_auxv != (void *)-1, environ, test_auxv); break;
 629                 CASE_TEST(environ_total);    EXPECT_GE(test_auxv != (void *)-1, (void *)test_auxv - (void *)environ - 1, env_total); break;
 630                 CASE_TEST(environ_HOME);     EXPECT_PTRNZ(1, getenv("HOME")); break;
 631                 CASE_TEST(auxv_addr);        EXPECT_PTRGT(test_auxv != (void *)-1, test_auxv, brk); break;
 632                 CASE_TEST(auxv_AT_UID);      EXPECT_EQ(1, getauxval(AT_UID), getuid()); break;
 633                 CASE_TEST(auxv_AT_PAGESZ);   EXPECT_GE(1, getauxval(AT_PAGESZ), 4096); break;
 634                 case __LINE__:
 635                         return ret; /* must be last */
 636                 /* note: do not set any defaults so as to permit holes above */
 637                 }
 638         }
 639         return ret;
 640 }
 641
 642
 643 /* used by some syscall tests below */
 644 int test_getdents64(const char *dir)
 645 {
 646         char buffer[4096];
 647         int fd, ret;
 648         int err;
 649
 650         ret = fd = open(dir, O_RDONLY | O_DIRECTORY, 0);
 651         if (ret < 0)
 652                 return ret;
 653
 654         ret = getdents64(fd, (void *)buffer, sizeof(buffer));
 655         err = errno;
 656         close(fd);
 657
 658         errno = err;
 659         return ret;
 660 }
 661
 662 int test_getpagesize(void)
 663 {
 664         int x = getpagesize();
 665         int c;
 666
 667         if (x < 0)
 668                 return x;
 669
 670 #if defined(__x86_64__) || defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)
 671         /*
 672          * x86 family is always 4K page.
 673          */
 674         c = (x == 4096);
 675 #elif defined(__aarch64__)
 676         /*
 677          * Linux aarch64 supports three values of page size: 4K, 16K, and 64K
 678          * which are selected at kernel compilation time.
 679          */
 680         c = (x == 4096 || x == (16 * 1024) || x == (64 * 1024));
 681 #else
 682         /*
 683          * Assuming other architectures must have at least 4K page.
 684          */
 685         c = (x >= 4096);
 686 #endif
 687
 688         return !c;
 689 }
 690
 691 int test_fork(void)
 692 {
 693         int status;
 694         pid_t pid;
 695
 696         /* flush the printf buffer to avoid child flush it */
 697         fflush(stdout);
 698         fflush(stderr);
 699
 700         pid = fork();
 701
 702         switch (pid) {
 703         case -1:
 704                 return 1;
 705
 706         case 0:
 707                 exit(123);
 708
 709         default:
 710                 pid = waitpid(pid, &status, 0);
 711
 712                 return pid == -1 || !WIFEXITED(status) || WEXITSTATUS(status) != 123;
 713         }
 714 }
 715
 716 int test_stat_timestamps(void)
 717 {
 718         struct stat st;
 719
 720         if (sizeof(st.st_atim.tv_sec) != sizeof(st.st_atime))
 721                 return 1;
 722
 723         if (stat("/proc/self/", &st) && stat(argv0, &st) && stat("/", &st))
 724                 return 1;
 725
 726         if (st.st_atim.tv_sec != st.st_atime || st.st_atim.tv_nsec > 1000000000)
 727                 return 1;
 728
 729         if (st.st_mtim.tv_sec != st.st_mtime || st.st_mtim.tv_nsec > 1000000000)
 730                 return 1;
 731
 732         if (st.st_ctim.tv_sec != st.st_ctime || st.st_ctim.tv_nsec > 1000000000)
 733                 return 1;
 734
 735         return 0;
 736 }
 737
 738 int test_mmap_munmap(void)
 739 {
 740         int ret, fd, i, page_size;
 741         void *mem;
 742         size_t file_size, length;
 743         off_t offset, pa_offset;
 744         struct stat stat_buf;
 745         const char * const files[] = {
 746                 "/dev/zero",
 747                 "/proc/1/exe", "/proc/self/exe",
 748                 argv0,
 749                 NULL
 750         };
 751
 752         page_size = getpagesize();
 753         if (page_size < 0)
 754                 return 1;
 755
 756         /* find a right file to mmap, existed and accessible */
 757         for (i = 0; files[i] != NULL; i++) {
 758                 ret = fd = open(files[i], O_RDONLY);
 759                 if (ret == -1)
 760                         continue;
 761                 else
 762                         break;
 763         }
 764         if (ret == -1)
 765                 return 1;
 766
 767         ret = stat(files[i], &stat_buf);
 768         if (ret == -1)
 769                 goto end;
 770
 771         /* file size of the special /dev/zero is 0, let's assign one manually */
 772         if (i == 0)
 773                 file_size = 3*page_size;
 774         else
 775                 file_size = stat_buf.st_size;
 776
 777         offset = file_size - 1;
 778         if (offset < 0)
 779                 offset = 0;
 780         length = file_size - offset;
 781         pa_offset = offset & ~(page_size - 1);
 782
 783         mem = mmap(NULL, length + offset - pa_offset, PROT_READ, MAP_SHARED, fd, pa_offset);
 784         if (mem == MAP_FAILED) {
 785                 ret = 1;
 786                 goto end;
 787         }
 788
 789         ret = munmap(mem, length + offset - pa_offset);
 790
 791 end:
 792         close(fd);
 793         return !!ret;
 794 }
 795
 796 int test_pipe(void)
 797 {
 798         const char *const msg = "hello, nolibc";
 799         int pipefd[2];
 800         char buf[32];
 801         size_t len;
 802
 803         if (pipe(pipefd) == -1)
 804                 return 1;
 805
 806         write(pipefd[1], msg, strlen(msg));
 807         close(pipefd[1]);
 808         len = read(pipefd[0], buf, sizeof(buf));
 809         close(pipefd[0]);
 810
 811         if (len != strlen(msg))
 812                 return 1;
 813
 814         return !!memcmp(buf, msg, len);
 815 }
 816
 817
 818 /* Run syscall tests between IDs <min> and <max>.
 819  * Return 0 on success, non-zero on failure.
 820  */
 821 int run_syscall(int min, int max)
 822 {
 823         struct timeval tv;
 824         struct timezone tz;
 825         struct stat stat_buf;
 826         int euid0;
 827         int proc;
 828         int test;
 829         int tmp;
 830         int ret = 0;
 831         void *p1, *p2;
 832         int has_gettid = 1;
 833
 834         /* <proc> indicates whether or not /proc is mounted */
 835         proc = stat("/proc", &stat_buf) == 0;
 836
 837         /* this will be used to skip certain tests that can't be run unprivileged */
 838         euid0 = geteuid() == 0;
 839
 840         /* from 2.30, glibc provides gettid() */
 841 #if defined(__GLIBC_MINOR__) && defined(__GLIBC__)
 842         has_gettid = __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 30);
 843 #endif
 844
 845         for (test = min; test >= 0 && test <= max; test++) {
 846                 int llen = 0; /* line length */
 847
 848                 /* avoid leaving empty lines below, this will insert holes into
 849                  * test numbers.
 850                  */
 851                 switch (test + __LINE__ + 1) {
 852                 CASE_TEST(getpid);            EXPECT_SYSNE(1, getpid(), -1); break;
 853                 CASE_TEST(getppid);           EXPECT_SYSNE(1, getppid(), -1); break;
 854                 CASE_TEST(gettid);            EXPECT_SYSNE(has_gettid, gettid(), -1); break;
 855                 CASE_TEST(getpgid_self);      EXPECT_SYSNE(1, getpgid(0), -1); break;
 856                 CASE_TEST(getpgid_bad);       EXPECT_SYSER(1, getpgid(-1), -1, ESRCH); break;
 857                 CASE_TEST(kill_0);            EXPECT_SYSZR(1, kill(getpid(), 0)); break;
 858                 CASE_TEST(kill_CONT);         EXPECT_SYSZR(1, kill(getpid(), 0)); break;
 859                 CASE_TEST(kill_BADPID);       EXPECT_SYSER(1, kill(INT_MAX, 0), -1, ESRCH); break;
 860                 CASE_TEST(sbrk_0);            EXPECT_PTRNE(1, sbrk(0), (void *)-1); break;
 861                 CASE_TEST(sbrk);              if ((p1 = p2 = sbrk(4096)) != (void *)-1) p2 = sbrk(-4096); EXPECT_SYSZR(1, (p2 == (void *)-1) || p2 == p1); break;
 862                 CASE_TEST(brk);               EXPECT_SYSZR(1, brk(sbrk(0))); break;
 863                 CASE_TEST(chdir_root);        EXPECT_SYSZR(1, chdir("/")); chdir(getenv("PWD")); break;
 864                 CASE_TEST(chdir_dot);         EXPECT_SYSZR(1, chdir(".")); break;
 865                 CASE_TEST(chdir_blah);        EXPECT_SYSER(1, chdir("/blah"), -1, ENOENT); break;
 866                 CASE_TEST(chmod_argv0);       EXPECT_SYSZR(1, chmod(argv0, 0555)); break;
 867                 CASE_TEST(chmod_self);        EXPECT_SYSER(proc, chmod("/proc/self", 0555), -1, EPERM); break;
 868                 CASE_TEST(chown_self);        EXPECT_SYSER(proc, chown("/proc/self", 0, 0), -1, EPERM); break;
 869                 CASE_TEST(chroot_root);       EXPECT_SYSZR(euid0, chroot("/")); break;
 870                 CASE_TEST(chroot_blah);       EXPECT_SYSER(1, chroot("/proc/self/blah"), -1, ENOENT); break;
 871                 CASE_TEST(chroot_exe);        EXPECT_SYSER(1, chroot(argv0), -1, ENOTDIR); break;
 872                 CASE_TEST(close_m1);          EXPECT_SYSER(1, close(-1), -1, EBADF); break;
 873                 CASE_TEST(close_dup);         EXPECT_SYSZR(1, close(dup(0))); break;
 874                 CASE_TEST(dup_0);             tmp = dup(0);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
 875                 CASE_TEST(dup_m1);            tmp = dup(-1); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
 876                 CASE_TEST(dup2_0);            tmp = dup2(0, 100);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
 877                 CASE_TEST(dup2_m1);           tmp = dup2(-1, 100); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
 878                 CASE_TEST(dup3_0);            tmp = dup3(0, 100, 0);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
 879                 CASE_TEST(dup3_m1);           tmp = dup3(-1, 100, 0); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
 880                 CASE_TEST(execve_root);       EXPECT_SYSER(1, execve("/", (char*[]){ [0] = "/", [1] = NULL }, NULL), -1, EACCES); break;
 881                 CASE_TEST(fork);              EXPECT_SYSZR(1, test_fork()); break;
 882                 CASE_TEST(getdents64_root);   EXPECT_SYSNE(1, test_getdents64("/"), -1); break;
 883                 CASE_TEST(getdents64_null);   EXPECT_SYSER(1, test_getdents64("/dev/null"), -1, ENOTDIR); break;
 884                 CASE_TEST(gettimeofday_tv);   EXPECT_SYSZR(1, gettimeofday(&tv, NULL)); break;
 885                 CASE_TEST(gettimeofday_tv_tz);EXPECT_SYSZR(1, gettimeofday(&tv, &tz)); break;
 886                 CASE_TEST(getpagesize);       EXPECT_SYSZR(1, test_getpagesize()); break;
 887                 CASE_TEST(ioctl_tiocinq);     EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
 888                 CASE_TEST(ioctl_tiocinq);     EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
 889                 CASE_TEST(link_root1);        EXPECT_SYSER(1, link("/", "/"), -1, EEXIST); break;
 890                 CASE_TEST(link_blah);         EXPECT_SYSER(1, link("/proc/self/blah", "/blah"), -1, ENOENT); break;
 891                 CASE_TEST(link_dir);          EXPECT_SYSER(euid0, link("/", "/blah"), -1, EPERM); break;
 892                 CASE_TEST(link_cross);        EXPECT_SYSER(proc, link("/proc/self/cmdline", "/blah"), -1, EXDEV); break;
 893                 CASE_TEST(lseek_m1);          EXPECT_SYSER(1, lseek(-1, 0, SEEK_SET), -1, EBADF); break;
 894                 CASE_TEST(lseek_0);           EXPECT_SYSER(1, lseek(0, 0, SEEK_SET), -1, ESPIPE); break;
 895                 CASE_TEST(mkdir_root);        EXPECT_SYSER(1, mkdir("/", 0755), -1, EEXIST); break;
 896                 CASE_TEST(mmap_bad);          EXPECT_PTRER(1, mmap(NULL, 0, PROT_READ, MAP_PRIVATE, 0, 0), MAP_FAILED, EINVAL); break;
 897                 CASE_TEST(munmap_bad);        EXPECT_SYSER(1, munmap((void *)1, 0), -1, EINVAL); break;
 898                 CASE_TEST(mmap_munmap_good);  EXPECT_SYSZR(1, test_mmap_munmap()); break;
 899                 CASE_TEST(open_tty);          EXPECT_SYSNE(1, tmp = open("/dev/null", 0), -1); if (tmp != -1) close(tmp); break;
 900                 CASE_TEST(open_blah);         EXPECT_SYSER(1, tmp = open("/proc/self/blah", 0), -1, ENOENT); if (tmp != -1) close(tmp); break;
 901                 CASE_TEST(pipe);              EXPECT_SYSZR(1, test_pipe()); break;
 902                 CASE_TEST(poll_null);         EXPECT_SYSZR(1, poll(NULL, 0, 0)); break;
 903                 CASE_TEST(poll_stdout);       EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break;
 904                 CASE_TEST(poll_fault);        EXPECT_SYSER(1, poll((void *)1, 1, 0), -1, EFAULT); break;
 905                 CASE_TEST(prctl);             EXPECT_SYSER(1, prctl(PR_SET_NAME, (unsigned long)NULL, 0, 0, 0), -1, EFAULT); break;
 906                 CASE_TEST(read_badf);         EXPECT_SYSER(1, read(-1, &tmp, 1), -1, EBADF); break;
 907                 CASE_TEST(rmdir_blah);        EXPECT_SYSER(1, rmdir("/blah"), -1, ENOENT); break;
 908                 CASE_TEST(sched_yield);       EXPECT_SYSZR(1, sched_yield()); break;
 909                 CASE_TEST(select_null);       EXPECT_SYSZR(1, ({ struct timeval tv = { 0 }; select(0, NULL, NULL, NULL, &tv); })); break;
 910                 CASE_TEST(select_stdout);     EXPECT_SYSNE(1, ({ fd_set fds; FD_ZERO(&fds); FD_SET(1, &fds); select(2, NULL, &fds, NULL, NULL); }), -1); break;
 911                 CASE_TEST(select_fault);      EXPECT_SYSER(1, select(1, (void *)1, NULL, NULL, 0), -1, EFAULT); break;
 912                 CASE_TEST(stat_blah);         EXPECT_SYSER(1, stat("/proc/self/blah", &stat_buf), -1, ENOENT); break;
 913                 CASE_TEST(stat_fault);        EXPECT_SYSER(1, stat((void *)1, &stat_buf), -1, EFAULT); break;
 914                 CASE_TEST(stat_timestamps);   EXPECT_SYSZR(1, test_stat_timestamps()); break;
 915                 CASE_TEST(symlink_root);      EXPECT_SYSER(1, symlink("/", "/"), -1, EEXIST); break;
 916                 CASE_TEST(unlink_root);       EXPECT_SYSER(1, unlink("/"), -1, EISDIR); break;
 917                 CASE_TEST(unlink_blah);       EXPECT_SYSER(1, unlink("/proc/self/blah"), -1, ENOENT); break;
 918                 CASE_TEST(wait_child);        EXPECT_SYSER(1, wait(&tmp), -1, ECHILD); break;
 919                 CASE_TEST(waitpid_min);       EXPECT_SYSER(1, waitpid(INT_MIN, &tmp, WNOHANG), -1, ESRCH); break;
 920                 CASE_TEST(waitpid_child);     EXPECT_SYSER(1, waitpid(getpid(), &tmp, WNOHANG), -1, ECHILD); break;
 921                 CASE_TEST(write_badf);        EXPECT_SYSER(1, write(-1, &tmp, 1), -1, EBADF); break;
 922                 CASE_TEST(write_zero);        EXPECT_SYSZR(1, write(1, &tmp, 0)); break;
 923                 CASE_TEST(syscall_noargs);    EXPECT_SYSEQ(1, syscall(__NR_getpid), getpid()); break;
 924                 CASE_TEST(syscall_args);      EXPECT_SYSER(1, syscall(__NR_statx, 0, NULL, 0, 0, NULL), -1, EFAULT); break;
 925                 case __LINE__:
 926                         return ret; /* must be last */
 927                 /* note: do not set any defaults so as to permit holes above */
 928                 }
 929         }
 930         return ret;
 931 }
 932
 933 int run_stdlib(int min, int max)
 934 {
 935         int test;
 936         int ret = 0;
 937
 938         for (test = min; test >= 0 && test <= max; test++) {
 939                 int llen = 0; /* line length */
 940
 941                 /* avoid leaving empty lines below, this will insert holes into
 942                  * test numbers.
 943                  */
 944                 switch (test + __LINE__ + 1) {
 945                 CASE_TEST(getenv_TERM);        EXPECT_STRNZ(1, getenv("TERM")); break;
 946                 CASE_TEST(getenv_blah);        EXPECT_STRZR(1, getenv("blah")); break;
 947                 CASE_TEST(setcmp_blah_blah);   EXPECT_EQ(1, strcmp("blah", "blah"), 0); break;
 948                 CASE_TEST(setcmp_blah_blah2);  EXPECT_NE(1, strcmp("blah", "blah2"), 0); break;
 949                 CASE_TEST(setncmp_blah_blah);  EXPECT_EQ(1, strncmp("blah", "blah", 10), 0); break;
 950                 CASE_TEST(setncmp_blah_blah4); EXPECT_EQ(1, strncmp("blah", "blah4", 4), 0); break;
 951                 CASE_TEST(setncmp_blah_blah5); EXPECT_NE(1, strncmp("blah", "blah5", 5), 0); break;
 952                 CASE_TEST(setncmp_blah_blah6); EXPECT_NE(1, strncmp("blah", "blah6", 6), 0); break;
 953                 CASE_TEST(strchr_foobar_o);    EXPECT_STREQ(1, strchr("foobar", 'o'), "oobar"); break;
 954                 CASE_TEST(strchr_foobar_z);    EXPECT_STRZR(1, strchr("foobar", 'z')); break;
 955                 CASE_TEST(strrchr_foobar_o);   EXPECT_STREQ(1, strrchr("foobar", 'o'), "obar"); break;
 956                 CASE_TEST(strrchr_foobar_z);   EXPECT_STRZR(1, strrchr("foobar", 'z')); break;
 957                 CASE_TEST(memcmp_20_20);       EXPECT_EQ(1, memcmp("aaa\x20", "aaa\x20", 4), 0); break;
 958                 CASE_TEST(memcmp_20_60);       EXPECT_LT(1, memcmp("aaa\x20", "aaa\x60", 4), 0); break;
 959                 CASE_TEST(memcmp_60_20);       EXPECT_GT(1, memcmp("aaa\x60", "aaa\x20", 4), 0); break;
 960                 CASE_TEST(memcmp_20_e0);       EXPECT_LT(1, memcmp("aaa\x20", "aaa\xe0", 4), 0); break;
 961                 CASE_TEST(memcmp_e0_20);       EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x20", 4), 0); break;
 962                 CASE_TEST(memcmp_80_e0);       EXPECT_LT(1, memcmp("aaa\x80", "aaa\xe0", 4), 0); break;
 963                 CASE_TEST(memcmp_e0_80);       EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x80", 4), 0); break;
 964                 CASE_TEST(limit_int8_max);          EXPECT_EQ(1, INT8_MAX,         (int8_t)          0x7f); break;
 965                 CASE_TEST(limit_int8_min);          EXPECT_EQ(1, INT8_MIN,         (int8_t)          0x80); break;
 966                 CASE_TEST(limit_uint8_max);         EXPECT_EQ(1, UINT8_MAX,        (uint8_t)         0xff); break;
 967                 CASE_TEST(limit_int16_max);         EXPECT_EQ(1, INT16_MAX,        (int16_t)         0x7fff); break;
 968                 CASE_TEST(limit_int16_min);         EXPECT_EQ(1, INT16_MIN,        (int16_t)         0x8000); break;
 969                 CASE_TEST(limit_uint16_max);        EXPECT_EQ(1, UINT16_MAX,       (uint16_t)        0xffff); break;
 970                 CASE_TEST(limit_int32_max);         EXPECT_EQ(1, INT32_MAX,        (int32_t)         0x7fffffff); break;
 971                 CASE_TEST(limit_int32_min);         EXPECT_EQ(1, INT32_MIN,        (int32_t)         0x80000000); break;
 972                 CASE_TEST(limit_uint32_max);        EXPECT_EQ(1, UINT32_MAX,       (uint32_t)        0xffffffff); break;
 973                 CASE_TEST(limit_int64_max);         EXPECT_EQ(1, INT64_MAX,        (int64_t)         0x7fffffffffffffff); break;
 974                 CASE_TEST(limit_int64_min);         EXPECT_EQ(1, INT64_MIN,        (int64_t)         0x8000000000000000); break;
 975                 CASE_TEST(limit_uint64_max);        EXPECT_EQ(1, UINT64_MAX,       (uint64_t)        0xffffffffffffffff); break;
 976                 CASE_TEST(limit_int_least8_max);    EXPECT_EQ(1, INT_LEAST8_MAX,   (int_least8_t)    0x7f); break;
 977                 CASE_TEST(limit_int_least8_min);    EXPECT_EQ(1, INT_LEAST8_MIN,   (int_least8_t)    0x80); break;
 978                 CASE_TEST(limit_uint_least8_max);   EXPECT_EQ(1, UINT_LEAST8_MAX,  (uint_least8_t)   0xff); break;
 979                 CASE_TEST(limit_int_least16_max);   EXPECT_EQ(1, INT_LEAST16_MAX,  (int_least16_t)   0x7fff); break;
 980                 CASE_TEST(limit_int_least16_min);   EXPECT_EQ(1, INT_LEAST16_MIN,  (int_least16_t)   0x8000); break;
 981                 CASE_TEST(limit_uint_least16_max);  EXPECT_EQ(1, UINT_LEAST16_MAX, (uint_least16_t)  0xffff); break;
 982                 CASE_TEST(limit_int_least32_max);   EXPECT_EQ(1, INT_LEAST32_MAX,  (int_least32_t)   0x7fffffff); break;
 983                 CASE_TEST(limit_int_least32_min);   EXPECT_EQ(1, INT_LEAST32_MIN,  (int_least32_t)   0x80000000); break;
 984                 CASE_TEST(limit_uint_least32_max);  EXPECT_EQ(1, UINT_LEAST32_MAX, (uint_least32_t)  0xffffffffU); break;
 985                 CASE_TEST(limit_int_least64_min);   EXPECT_EQ(1, INT_LEAST64_MIN,  (int_least64_t)   0x8000000000000000LL); break;
 986                 CASE_TEST(limit_int_least64_max);   EXPECT_EQ(1, INT_LEAST64_MAX,  (int_least64_t)   0x7fffffffffffffffLL); break;
 987                 CASE_TEST(limit_uint_least64_max);  EXPECT_EQ(1, UINT_LEAST64_MAX, (uint_least64_t)  0xffffffffffffffffULL); break;
 988                 CASE_TEST(limit_int_fast8_max);     EXPECT_EQ(1, INT_FAST8_MAX,    (int_fast8_t)     0x7f); break;
 989                 CASE_TEST(limit_int_fast8_min);     EXPECT_EQ(1, INT_FAST8_MIN,    (int_fast8_t)     0x80); break;
 990                 CASE_TEST(limit_uint_fast8_max);    EXPECT_EQ(1, UINT_FAST8_MAX,   (uint_fast8_t)    0xff); break;
 991                 CASE_TEST(limit_int_fast16_min);    EXPECT_EQ(1, INT_FAST16_MIN,   (int_fast16_t)    SINT_MIN_OF_TYPE(int_fast16_t)); break;
 992                 CASE_TEST(limit_int_fast16_max);    EXPECT_EQ(1, INT_FAST16_MAX,   (int_fast16_t)    SINT_MAX_OF_TYPE(int_fast16_t)); break;
 993                 CASE_TEST(limit_uint_fast16_max);   EXPECT_EQ(1, UINT_FAST16_MAX,  (uint_fast16_t)   UINTPTR_MAX); break;
 994                 CASE_TEST(limit_int_fast32_min);    EXPECT_EQ(1, INT_FAST32_MIN,   (int_fast32_t)    SINT_MIN_OF_TYPE(int_fast32_t)); break;
 995                 CASE_TEST(limit_int_fast32_max);    EXPECT_EQ(1, INT_FAST32_MAX,   (int_fast32_t)    SINT_MAX_OF_TYPE(int_fast32_t)); break;
 996                 CASE_TEST(limit_uint_fast32_max);   EXPECT_EQ(1, UINT_FAST32_MAX,  (uint_fast32_t)   UINTPTR_MAX); break;
 997                 CASE_TEST(limit_int_fast64_min);    EXPECT_EQ(1, INT_FAST64_MIN,   (int_fast64_t)    INT64_MIN); break;
 998                 CASE_TEST(limit_int_fast64_max);    EXPECT_EQ(1, INT_FAST64_MAX,   (int_fast64_t)    INT64_MAX); break;
 999                 CASE_TEST(limit_uint_fast64_max);   EXPECT_EQ(1, UINT_FAST64_MAX,  (uint_fast64_t)   UINT64_MAX); break;
1000                 CASE_TEST(sizeof_long_sane);        EXPECT_EQ(1, sizeof(long) == 8 || sizeof(long) == 4, 1); break;
1001                 CASE_TEST(limit_intptr_min);        EXPECT_EQ(1, INTPTR_MIN,  sizeof(long) == 8 ? (intptr_t)  0x8000000000000000LL  : (intptr_t)  0x80000000); break;
1002                 CASE_TEST(limit_intptr_max);        EXPECT_EQ(1, INTPTR_MAX,  sizeof(long) == 8 ? (intptr_t)  0x7fffffffffffffffLL  : (intptr_t)  0x7fffffff); break;
1003                 CASE_TEST(limit_uintptr_max);       EXPECT_EQ(1, UINTPTR_MAX, sizeof(long) == 8 ? (uintptr_t) 0xffffffffffffffffULL : (uintptr_t) 0xffffffffU); break;
1004                 CASE_TEST(limit_ptrdiff_min);       EXPECT_EQ(1, PTRDIFF_MIN, sizeof(long) == 8 ? (ptrdiff_t) 0x8000000000000000LL  : (ptrdiff_t) 0x80000000); break;
1005                 CASE_TEST(limit_ptrdiff_max);       EXPECT_EQ(1, PTRDIFF_MAX, sizeof(long) == 8 ? (ptrdiff_t) 0x7fffffffffffffffLL  : (ptrdiff_t) 0x7fffffff); break;
1006                 CASE_TEST(limit_size_max);          EXPECT_EQ(1, SIZE_MAX,    sizeof(long) == 8 ? (size_t)    0xffffffffffffffffULL : (size_t)    0xffffffffU); break;
1007
1008                 case __LINE__:
1009                         return ret; /* must be last */
1010                 /* note: do not set any defaults so as to permit holes above */
1011                 }
1012         }
1013         return ret;
1014 }
1015
1016 #define EXPECT_VFPRINTF(c, expected, fmt, ...)                          \
1017         ret += expect_vfprintf(llen, c, expected, fmt, ##__VA_ARGS__)
1018
1019 static int expect_vfprintf(int llen, int c, const char *expected, const char *fmt, ...)
1020 {
1021         int ret, fd;
1022         ssize_t w, r;
1023         char buf[100];
1024         FILE *memfile;
1025         va_list args;
1026
1027         fd = open("/tmp", O_TMPFILE | O_EXCL | O_RDWR, 0600);
1028         if (fd == -1) {
1029                 result(llen, SKIPPED);
1030                 return 0;
1031         }
1032
1033         memfile = fdopen(fd, "w+");
1034         if (!memfile) {
1035                 result(llen, FAIL);
1036                 return 1;
1037         }
1038
1039         va_start(args, fmt);
1040         w = vfprintf(memfile, fmt, args);
1041         va_end(args);
1042
1043         if (w != c) {
1044                 llen += printf(" written(%d) != %d", (int)w, c);
1045                 result(llen, FAIL);
1046                 return 1;
1047         }
1048
1049         fflush(memfile);
1050         lseek(fd, 0, SEEK_SET);
1051
1052         r = read(fd, buf, sizeof(buf) - 1);
1053
1054         fclose(memfile);
1055
1056         if (r != w) {
1057                 llen += printf(" written(%d) != read(%d)", (int)w, (int)r);
1058                 result(llen, FAIL);
1059                 return 1;
1060         }
1061
1062         buf[r] = '\0';
1063         llen += printf(" \"%s\" = \"%s\"", expected, buf);
1064         ret = strncmp(expected, buf, c);
1065
1066         result(llen, ret ? FAIL : OK);
1067         return ret;
1068 }
1069
1070 static int run_vfprintf(int min, int max)
1071 {
1072         int test;
1073         int ret = 0;
1074
1075         for (test = min; test >= 0 && test <= max; test++) {
1076                 int llen = 0; /* line length */
1077
1078                 /* avoid leaving empty lines below, this will insert holes into
1079                  * test numbers.
1080                  */
1081                 switch (test + __LINE__ + 1) {
1082                 CASE_TEST(empty);        EXPECT_VFPRINTF(0, "", ""); break;
1083                 CASE_TEST(simple);       EXPECT_VFPRINTF(3, "foo", "foo"); break;
1084                 CASE_TEST(string);       EXPECT_VFPRINTF(3, "foo", "%s", "foo"); break;
1085                 CASE_TEST(number);       EXPECT_VFPRINTF(4, "1234", "%d", 1234); break;
1086                 CASE_TEST(negnumber);    EXPECT_VFPRINTF(5, "-1234", "%d", -1234); break;
1087                 CASE_TEST(unsigned);     EXPECT_VFPRINTF(5, "12345", "%u", 12345); break;
1088                 CASE_TEST(char);         EXPECT_VFPRINTF(1, "c", "%c", 'c'); break;
1089                 CASE_TEST(hex);          EXPECT_VFPRINTF(1, "f", "%x", 0xf); break;
1090                 CASE_TEST(pointer);      EXPECT_VFPRINTF(3, "0x1", "%p", (void *) 0x1); break;
1091                 case __LINE__:
1092                         return ret; /* must be last */
1093                 /* note: do not set any defaults so as to permit holes above */
1094                 }
1095         }
1096         return ret;
1097 }
1098
1099 static int smash_stack(void)
1100 {
1101         char buf[100];
1102         volatile char *ptr = buf;
1103         size_t i;
1104
1105         for (i = 0; i < 200; i++)
1106                 ptr[i] = 'P';
1107
1108         return 1;
1109 }
1110
1111 static int run_protection(int min __attribute__((unused)),
1112                           int max __attribute__((unused)))
1113 {
1114         pid_t pid;
1115         int llen = 0, status;
1116
1117         llen += printf("0 -fstackprotector ");
1118
1119 #if !defined(_NOLIBC_STACKPROTECTOR)
1120         llen += printf("not supported");
1121         result(llen, SKIPPED);
1122         return 0;
1123 #endif
1124
1125 #if defined(_NOLIBC_STACKPROTECTOR)
1126         if (!__stack_chk_guard) {
1127                 llen += printf("__stack_chk_guard not initialized");
1128                 result(llen, FAIL);
1129                 return 1;
1130         }
1131 #endif
1132
1133         pid = -1;
1134         pid = fork();
1135
1136         switch (pid) {
1137         case -1:
1138                 llen += printf("fork()");
1139                 result(llen, FAIL);
1140                 return 1;
1141
1142         case 0:
1143                 close(STDOUT_FILENO);
1144                 close(STDERR_FILENO);
1145
1146                 prctl(PR_SET_DUMPABLE, 0, 0, 0, 0);
1147                 smash_stack();
1148                 return 1;
1149
1150         default:
1151                 pid = waitpid(pid, &status, 0);
1152
1153                 if (pid == -1 || !WIFSIGNALED(status) || WTERMSIG(status) != SIGABRT) {
1154                         llen += printf("waitpid()");
1155                         result(llen, FAIL);
1156                         return 1;
1157                 }
1158                 result(llen, OK);
1159                 return 0;
1160         }
1161 }
1162
1163 /* prepare what needs to be prepared for pid 1 (stdio, /dev, /proc, etc) */
1164 int prepare(void)
1165 {
1166         struct stat stat_buf;
1167
1168         /* It's possible that /dev doesn't even exist or was not mounted, so
1169          * we'll try to create it, mount it, or create minimal entries into it.
1170          * We want at least /dev/null and /dev/console.
1171          */
1172         if (stat("/dev/.", &stat_buf) == 0 || mkdir("/dev", 0755) == 0) {
1173                 if (stat("/dev/console", &stat_buf) != 0 ||
1174                     stat("/dev/null", &stat_buf) != 0 ||
1175                     stat("/dev/zero", &stat_buf) != 0) {
1176                         /* try devtmpfs first, otherwise fall back to manual creation */
1177                         if (mount("/dev", "/dev", "devtmpfs", 0, 0) != 0) {
1178                                 mknod("/dev/console", 0600 | S_IFCHR, makedev(5, 1));
1179                                 mknod("/dev/null",    0666 | S_IFCHR, makedev(1, 3));
1180                                 mknod("/dev/zero",    0666 | S_IFCHR, makedev(1, 5));
1181                         }
1182                 }
1183         }
1184
1185         /* If no /dev/console was found before calling init, stdio is closed so
1186          * we need to reopen it from /dev/console. If it failed above, it will
1187          * still fail here and we cannot emit a message anyway.
1188          */
1189         if (close(dup(1)) == -1) {
1190                 int fd = open("/dev/console", O_RDWR);
1191
1192                 if (fd >= 0) {
1193                         if (fd != 0)
1194                                 dup2(fd, 0);
1195                         if (fd != 1)
1196                                 dup2(fd, 1);
1197                         if (fd != 2)
1198                                 dup2(fd, 2);
1199                         if (fd > 2)
1200                                 close(fd);
1201                         puts("\nSuccessfully reopened /dev/console.");
1202                 }
1203         }
1204
1205         /* try to mount /proc if not mounted. Silently fail otherwise */
1206         if (stat("/proc/.", &stat_buf) == 0 || mkdir("/proc", 0755) == 0) {
1207                 if (stat("/proc/self", &stat_buf) != 0) {
1208                         /* If not mountable, remove /proc completely to avoid misuse */
1209                         if (mount("none", "/proc", "proc", 0, 0) != 0)
1210                                 rmdir("/proc");
1211                 }
1212         }
1213
1214         /* some tests rely on a writable /tmp */
1215         mkdir("/tmp", 0755);
1216
1217         return 0;
1218 }
1219
1220 /* This is the definition of known test names, with their functions */
1221 static const struct test test_names[] = {
1222         /* add new tests here */
1223         { .name = "startup",    .func = run_startup    },
1224         { .name = "syscall",    .func = run_syscall    },
1225         { .name = "stdlib",     .func = run_stdlib     },
1226         { .name = "vfprintf",   .func = run_vfprintf   },
1227         { .name = "protection", .func = run_protection },
1228         { 0 }
1229 };
1230
1231 static int is_setting_valid(char *test)
1232 {
1233         int idx, len, test_len, valid = 0;
1234         char delimiter;
1235
1236         if (!test)
1237                 return valid;
1238
1239         test_len = strlen(test);
1240
1241         for (idx = 0; test_names[idx].name; idx++) {
1242                 len = strlen(test_names[idx].name);
1243                 if (test_len < len)
1244                         continue;
1245
1246                 if (strncmp(test, test_names[idx].name, len) != 0)
1247                         continue;
1248
1249                 delimiter = test[len];
1250                 if (delimiter != ':' && delimiter != ',' && delimiter != '\0')
1251                         continue;
1252
1253                 valid = 1;
1254                 break;
1255         }
1256
1257         return valid;
1258 }
1259
1260 int main(int argc, char **argv, char **envp)
1261 {
1262         int min = 0;
1263         int max = INT_MAX;
1264         int ret = 0;
1265         int err;
1266         int idx;
1267         char *test;
1268
1269         argv0 = argv[0];
1270         test_argc = argc;
1271         test_argv = argv;
1272         test_envp = envp;
1273
1274         /* when called as init, it's possible that no console was opened, for
1275          * example if no /dev file system was provided. We'll check that fd#1
1276          * was opened, and if not we'll attempt to create and open /dev/console
1277          * and /dev/null that we'll use for later tests.
1278          */
1279         if (getpid() == 1)
1280                 prepare();
1281
1282         /* the definition of a series of tests comes from either argv[1] or the
1283          * "NOLIBC_TEST" environment variable. It's made of a comma-delimited
1284          * series of test names and optional ranges:
1285          *    syscall:5-15[:.*],stdlib:8-10
1286          */
1287         test = argv[1];
1288         if (!is_setting_valid(test))
1289                 test = getenv("NOLIBC_TEST");
1290
1291         if (is_setting_valid(test)) {
1292                 char *comma, *colon, *dash, *value;
1293
1294                 do {
1295                         comma = strchr(test, ',');
1296                         if (comma)
1297                                 *(comma++) = '\0';
1298
1299                         colon = strchr(test, ':');
1300                         if (colon)
1301                                 *(colon++) = '\0';
1302
1303                         for (idx = 0; test_names[idx].name; idx++) {
1304                                 if (strcmp(test, test_names[idx].name) == 0)
1305                                         break;
1306                         }
1307
1308                         if (test_names[idx].name) {
1309                                 /* The test was named, it will be called at least
1310                                  * once. We may have an optional range at <colon>
1311                                  * here, which defaults to the full range.
1312                                  */
1313                                 do {
1314                                         min = 0; max = INT_MAX;
1315                                         value = colon;
1316                                         if (value && *value) {
1317                                                 colon = strchr(value, ':');
1318                                                 if (colon)
1319                                                         *(colon++) = '\0';
1320
1321                                                 dash = strchr(value, '-');
1322                                                 if (dash)
1323                                                         *(dash++) = '\0';
1324
1325                                                 /* support :val: :min-max: :min-: :-max: */
1326                                                 if (*value)
1327                                                         min = atoi(value);
1328                                                 if (!dash)
1329                                                         max = min;
1330                                                 else if (*dash)
1331                                                         max = atoi(dash);
1332
1333                                                 value = colon;
1334                                         }
1335
1336                                         /* now's time to call the test */
1337                                         printf("Running test '%s'\n", test_names[idx].name);
1338                                         err = test_names[idx].func(min, max);
1339                                         ret += err;
1340                                         printf("Errors during this test: %d\n\n", err);
1341                                 } while (colon && *colon);
1342                         } else
1343                                 printf("Ignoring unknown test name '%s'\n", test);
1344
1345                         test = comma;
1346                 } while (test && *test);
1347         } else {
1348                 /* no test mentioned, run everything */
1349                 for (idx = 0; test_names[idx].name; idx++) {
1350                         printf("Running test '%s'\n", test_names[idx].name);
1351                         err = test_names[idx].func(min, max);
1352                         ret += err;
1353                         printf("Errors during this test: %d\n\n", err);
1354                 }
1355         }
1356
1357         printf("Total number of errors: %d\n", ret);
1358
1359         if (getpid() == 1) {
1360                 /* we're running as init, there's no other process on the
1361                  * system, thus likely started from a VM for a quick check.
1362                  * Exiting will provoke a kernel panic that may be reported
1363                  * as an error by Qemu or the hypervisor, while stopping
1364                  * cleanly will often be reported as a success. This allows
1365                  * to use the output of this program for bisecting kernels.
1366                  */
1367                 printf("Leaving init with final status: %d\n", !!ret);
1368                 if (ret == 0)
1369                         reboot(RB_POWER_OFF);
1370 #if defined(__x86_64__)
1371                 /* QEMU started with "-device isa-debug-exit -no-reboot" will
1372                  * exit with status code 2N+1 when N is written to 0x501. We
1373                  * hard-code the syscall here as it's arch-dependent.
1374                  */
1375                 else if (syscall(__NR_ioperm, 0x501, 1, 1) == 0)
1376                         __asm__ volatile ("outb %%al, %%dx" :: "d"(0x501), "a"(0));
1377                 /* if it does nothing, fall back to the regular panic */
1378 #endif
1379         }
1380
1381         printf("Exiting with status %d\n", !!ret);
1382         return !!ret;
1383 }