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/resource.h>
  26 #include <sys/stat.h>
  27 #include <sys/syscall.h>
  28 #include <sys/sysmacros.h>
  29 #include <sys/time.h>
  30 #include <sys/utsname.h>
  31 #include <sys/wait.h>
  32 #include <dirent.h>
  33 #include <errno.h>
  34 #include <fcntl.h>
  35 #include <poll.h>
  36 #include <sched.h>
  37 #include <signal.h>
  38 #include <stdarg.h>
  39 #include <stddef.h>
  40 #include <stdint.h>
  41 #include <unistd.h>
  42 #include <limits.h>
  43 #endif
  44 #endif
  45
  46 #include "nolibc-test-linkage.h"
  47
  48 /* for the type of int_fast16_t and int_fast32_t, musl differs from glibc and nolibc */
  49 #define SINT_MAX_OF_TYPE(type) (((type)1 << (sizeof(type) * 8 - 2)) - (type)1 + ((type)1 << (sizeof(type) * 8 - 2)))
  50 #define SINT_MIN_OF_TYPE(type) (-SINT_MAX_OF_TYPE(type) - 1)
  51
  52 /* will be used to test initialization of environ */
  53 static char **test_envp;
  54
  55 /* will be used to test initialization of argv */
  56 static char **test_argv;
  57
  58 /* will be used to test initialization of argc */
  59 static int test_argc;
  60
  61 /* will be used by some test cases as readable file, please don't write it */
  62 static const char *argv0;
  63
  64 /* will be used by constructor tests */
  65 static int constructor_test_value;
  66
  67 static const int is_nolibc =
  68 #ifdef NOLIBC
  69         1
  70 #else
  71         0
  72 #endif
  73 ;
  74
  75 /* definition of a series of tests */
  76 struct test {
  77         const char *name;              /* test name */
  78         int (*func)(int min, int max); /* handler */
  79 };
  80
  81 #ifndef _NOLIBC_STDLIB_H
  82 char *itoa(int i)
  83 {
  84         static char buf[12];
  85         int ret;
  86
  87         ret = snprintf(buf, sizeof(buf), "%d", i);
  88         return (ret >= 0 && ret < sizeof(buf)) ? buf : "#err";
  89 }
  90 #endif
  91
  92 #define CASE_ERR(err) \
  93         case err: return #err
  94
  95 /* returns the error name (e.g. "ENOENT") for common errors, "SUCCESS" for 0,
  96  * or the decimal value for less common ones.
  97  */
  98 static const char *errorname(int err)
  99 {
 100         switch (err) {
 101         case 0: return "SUCCESS";
 102         CASE_ERR(EPERM);
 103         CASE_ERR(ENOENT);
 104         CASE_ERR(ESRCH);
 105         CASE_ERR(EINTR);
 106         CASE_ERR(EIO);
 107         CASE_ERR(ENXIO);
 108         CASE_ERR(E2BIG);
 109         CASE_ERR(ENOEXEC);
 110         CASE_ERR(EBADF);
 111         CASE_ERR(ECHILD);
 112         CASE_ERR(EAGAIN);
 113         CASE_ERR(ENOMEM);
 114         CASE_ERR(EACCES);
 115         CASE_ERR(EFAULT);
 116         CASE_ERR(ENOTBLK);
 117         CASE_ERR(EBUSY);
 118         CASE_ERR(EEXIST);
 119         CASE_ERR(EXDEV);
 120         CASE_ERR(ENODEV);
 121         CASE_ERR(ENOTDIR);
 122         CASE_ERR(EISDIR);
 123         CASE_ERR(EINVAL);
 124         CASE_ERR(ENFILE);
 125         CASE_ERR(EMFILE);
 126         CASE_ERR(ENOTTY);
 127         CASE_ERR(ETXTBSY);
 128         CASE_ERR(EFBIG);
 129         CASE_ERR(ENOSPC);
 130         CASE_ERR(ESPIPE);
 131         CASE_ERR(EROFS);
 132         CASE_ERR(EMLINK);
 133         CASE_ERR(EPIPE);
 134         CASE_ERR(EDOM);
 135         CASE_ERR(ERANGE);
 136         CASE_ERR(ENOSYS);
 137         CASE_ERR(EOVERFLOW);
 138         default:
 139                 return itoa(err);
 140         }
 141 }
 142
 143 static void align_result(size_t llen)
 144 {
 145         const size_t align = 64;
 146         char buf[align];
 147         size_t n;
 148
 149         if (llen >= align)
 150                 return;
 151
 152         n = align - llen;
 153         memset(buf, ' ', n);
 154         buf[n] = '\0';
 155         fputs(buf, stdout);
 156 }
 157
 158 enum RESULT {
 159         OK,
 160         FAIL,
 161         SKIPPED,
 162 };
 163
 164 static void result(int llen, enum RESULT r)
 165 {
 166         const char *msg;
 167
 168         if (r == OK)
 169                 msg = "  [OK]";
 170         else if (r == SKIPPED)
 171                 msg = "[SKIPPED]";
 172         else
 173                 msg = " [FAIL]";
 174
 175         align_result(llen);
 176         puts(msg);
 177 }
 178
 179 /* The tests below are intended to be used by the macroes, which evaluate
 180  * expression <expr>, print the status to stdout, and update the "ret"
 181  * variable to count failures. The functions themselves return the number
 182  * of failures, thus either 0 or 1.
 183  */
 184
 185 #define EXPECT_ZR(cond, expr)                           \
 186         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_zr(expr, llen); } while (0)
 187
 188 static __attribute__((unused))
 189 int expect_zr(int expr, int llen)
 190 {
 191         int ret = !(expr == 0);
 192
 193         llen += printf(" = %d ", expr);
 194         result(llen, ret ? FAIL : OK);
 195         return ret;
 196 }
 197
 198
 199 #define EXPECT_NZ(cond, expr, val)                      \
 200         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_nz(expr, llen; } while (0)
 201
 202 static __attribute__((unused))
 203 int expect_nz(int expr, int llen)
 204 {
 205         int ret = !(expr != 0);
 206
 207         llen += printf(" = %d ", expr);
 208         result(llen, ret ? FAIL : OK);
 209         return ret;
 210 }
 211
 212
 213 #define EXPECT_EQ(cond, expr, val)                              \
 214         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_eq(expr, llen, val); } while (0)
 215
 216 static __attribute__((unused))
 217 int expect_eq(uint64_t expr, int llen, uint64_t val)
 218 {
 219         int ret = !(expr == val);
 220
 221         llen += printf(" = %lld ", (long long)expr);
 222         result(llen, ret ? FAIL : OK);
 223         return ret;
 224 }
 225
 226
 227 #define EXPECT_NE(cond, expr, val)                              \
 228         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ne(expr, llen, val); } while (0)
 229
 230 static __attribute__((unused))
 231 int expect_ne(int expr, int llen, int val)
 232 {
 233         int ret = !(expr != val);
 234
 235         llen += printf(" = %d ", expr);
 236         result(llen, ret ? FAIL : OK);
 237         return ret;
 238 }
 239
 240
 241 #define EXPECT_GE(cond, expr, val)                              \
 242         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ge(expr, llen, val); } while (0)
 243
 244 static __attribute__((unused))
 245 int expect_ge(int expr, int llen, int val)
 246 {
 247         int ret = !(expr >= val);
 248
 249         llen += printf(" = %d ", expr);
 250         result(llen, ret ? FAIL : OK);
 251         return ret;
 252 }
 253
 254
 255 #define EXPECT_GT(cond, expr, val)                              \
 256         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_gt(expr, llen, val); } while (0)
 257
 258 static __attribute__((unused))
 259 int expect_gt(int expr, int llen, int val)
 260 {
 261         int ret = !(expr > val);
 262
 263         llen += printf(" = %d ", expr);
 264         result(llen, ret ? FAIL : OK);
 265         return ret;
 266 }
 267
 268
 269 #define EXPECT_LE(cond, expr, val)                              \
 270         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_le(expr, llen, val); } while (0)
 271
 272 static __attribute__((unused))
 273 int expect_le(int expr, int llen, int val)
 274 {
 275         int ret = !(expr <= val);
 276
 277         llen += printf(" = %d ", expr);
 278         result(llen, ret ? FAIL : OK);
 279         return ret;
 280 }
 281
 282
 283 #define EXPECT_LT(cond, expr, val)                              \
 284         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_lt(expr, llen, val); } while (0)
 285
 286 static __attribute__((unused))
 287 int expect_lt(int expr, int llen, int val)
 288 {
 289         int ret = !(expr < val);
 290
 291         llen += printf(" = %d ", expr);
 292         result(llen, ret ? FAIL : OK);
 293         return ret;
 294 }
 295
 296
 297 #define EXPECT_SYSZR(cond, expr)                                \
 298         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_syszr(expr, llen); } while (0)
 299
 300 static __attribute__((unused))
 301 int expect_syszr(int expr, int llen)
 302 {
 303         int ret = 0;
 304
 305         if (expr) {
 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_SYSEQ(cond, expr, val)                           \
 318         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_syseq(expr, llen, val); } while (0)
 319
 320 static __attribute__((unused))
 321 int expect_syseq(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_SYSNE(cond, expr, val)                           \
 338         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_sysne(expr, llen, val); } while (0)
 339
 340 static __attribute__((unused))
 341 int expect_sysne(int expr, int llen, int val)
 342 {
 343         int ret = 0;
 344
 345         if (expr == val) {
 346                 ret = 1;
 347                 llen += printf(" = %d %s ", expr, errorname(errno));
 348                 result(llen, FAIL);
 349         } else {
 350                 llen += printf(" = %d ", expr);
 351                 result(llen, OK);
 352         }
 353         return ret;
 354 }
 355
 356
 357 #define EXPECT_SYSER2(cond, expr, expret, experr1, experr2)             \
 358         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_syserr2(expr, expret, experr1, experr2, llen); } while (0)
 359
 360 #define EXPECT_SYSER(cond, expr, expret, experr)                        \
 361         EXPECT_SYSER2(cond, expr, expret, experr, 0)
 362
 363 static __attribute__((unused))
 364 int expect_syserr2(int expr, int expret, int experr1, int experr2, int llen)
 365 {
 366         int ret = 0;
 367         int _errno = errno;
 368
 369         llen += printf(" = %d %s ", expr, errorname(_errno));
 370         if (expr != expret || (_errno != experr1 && _errno != experr2)) {
 371                 ret = 1;
 372                 if (experr2 == 0)
 373                         llen += printf(" != (%d %s) ", expret, errorname(experr1));
 374                 else
 375                         llen += printf(" != (%d %s %s) ", expret, errorname(experr1), errorname(experr2));
 376                 result(llen, FAIL);
 377         } else {
 378                 result(llen, OK);
 379         }
 380         return ret;
 381 }
 382
 383
 384 #define EXPECT_PTRZR(cond, expr)                                \
 385         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrzr(expr, llen); } while (0)
 386
 387 static __attribute__((unused))
 388 int expect_ptrzr(const void *expr, int llen)
 389 {
 390         int ret = 0;
 391
 392         llen += printf(" = <%p> ", expr);
 393         if (expr) {
 394                 ret = 1;
 395                 result(llen, FAIL);
 396         } else {
 397                 result(llen, OK);
 398         }
 399         return ret;
 400 }
 401
 402
 403 #define EXPECT_PTRNZ(cond, expr)                                \
 404         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrnz(expr, llen); } while (0)
 405
 406 static __attribute__((unused))
 407 int expect_ptrnz(const void *expr, int llen)
 408 {
 409         int ret = 0;
 410
 411         llen += printf(" = <%p> ", expr);
 412         if (!expr) {
 413                 ret = 1;
 414                 result(llen, FAIL);
 415         } else {
 416                 result(llen, OK);
 417         }
 418         return ret;
 419 }
 420
 421 #define EXPECT_PTREQ(cond, expr, cmp)                           \
 422         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptreq(expr, llen, cmp); } while (0)
 423
 424 static __attribute__((unused))
 425 int expect_ptreq(const void *expr, int llen, const void *cmp)
 426 {
 427         int ret = 0;
 428
 429         llen += printf(" = <%p> ", expr);
 430         if (expr != cmp) {
 431                 ret = 1;
 432                 result(llen, FAIL);
 433         } else {
 434                 result(llen, OK);
 435         }
 436         return ret;
 437 }
 438
 439 #define EXPECT_PTRNE(cond, expr, cmp)                           \
 440         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrne(expr, llen, cmp); } while (0)
 441
 442 static __attribute__((unused))
 443 int expect_ptrne(const void *expr, int llen, const void *cmp)
 444 {
 445         int ret = 0;
 446
 447         llen += printf(" = <%p> ", expr);
 448         if (expr == cmp) {
 449                 ret = 1;
 450                 result(llen, FAIL);
 451         } else {
 452                 result(llen, OK);
 453         }
 454         return ret;
 455 }
 456
 457 #define EXPECT_PTRGE(cond, expr, cmp)                           \
 458         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrge(expr, llen, cmp); } while (0)
 459
 460 static __attribute__((unused))
 461 int expect_ptrge(const void *expr, int llen, const void *cmp)
 462 {
 463         int ret = !(expr >= cmp);
 464
 465         llen += printf(" = <%p> ", expr);
 466         result(llen, ret ? FAIL : OK);
 467         return ret;
 468 }
 469
 470 #define EXPECT_PTRGT(cond, expr, cmp)                           \
 471         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrgt(expr, llen, cmp); } while (0)
 472
 473 static __attribute__((unused))
 474 int expect_ptrgt(const void *expr, int llen, const void *cmp)
 475 {
 476         int ret = !(expr > cmp);
 477
 478         llen += printf(" = <%p> ", expr);
 479         result(llen, ret ? FAIL : OK);
 480         return ret;
 481 }
 482
 483
 484 #define EXPECT_PTRLE(cond, expr, cmp)                           \
 485         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrle(expr, llen, cmp); } while (0)
 486
 487 static __attribute__((unused))
 488 int expect_ptrle(const void *expr, int llen, const void *cmp)
 489 {
 490         int ret = !(expr <= cmp);
 491
 492         llen += printf(" = <%p> ", expr);
 493         result(llen, ret ? FAIL : OK);
 494         return ret;
 495 }
 496
 497
 498 #define EXPECT_PTRLT(cond, expr, cmp)                           \
 499         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrlt(expr, llen, cmp); } while (0)
 500
 501 static __attribute__((unused))
 502 int expect_ptrlt(const void *expr, int llen, const void *cmp)
 503 {
 504         int ret = !(expr < cmp);
 505
 506         llen += printf(" = <%p> ", expr);
 507         result(llen, ret ? FAIL : OK);
 508         return ret;
 509 }
 510
 511 #define EXPECT_PTRER2(cond, expr, expret, experr1, experr2)             \
 512         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrerr2(expr, expret, experr1, experr2, llen); } while (0)
 513
 514 #define EXPECT_PTRER(cond, expr, expret, experr)                        \
 515         EXPECT_PTRER2(cond, expr, expret, experr, 0)
 516
 517 static __attribute__((unused))
 518 int expect_ptrerr2(const void *expr, const void *expret, int experr1, int experr2, int llen)
 519 {
 520         int ret = 0;
 521         int _errno = errno;
 522
 523         llen += printf(" = <%p> %s ", expr, errorname(_errno));
 524         if (expr != expret || (_errno != experr1 && _errno != experr2)) {
 525                 ret = 1;
 526                 if (experr2 == 0)
 527                         llen += printf(" != (<%p> %s) ", expret, errorname(experr1));
 528                 else
 529                         llen += printf(" != (<%p> %s %s) ", expret, errorname(experr1), errorname(experr2));
 530                 result(llen, FAIL);
 531         } else {
 532                 result(llen, OK);
 533         }
 534         return ret;
 535 }
 536
 537 #define EXPECT_STRZR(cond, expr)                                \
 538         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strzr(expr, llen); } while (0)
 539
 540 static __attribute__((unused))
 541 int expect_strzr(const char *expr, int llen)
 542 {
 543         int ret = 0;
 544
 545         llen += printf(" = <%s> ", expr ? expr : "(null)");
 546         if (expr) {
 547                 ret = 1;
 548                 result(llen, FAIL);
 549         } else {
 550                 result(llen, OK);
 551         }
 552         return ret;
 553 }
 554
 555
 556 #define EXPECT_STRNZ(cond, expr)                                \
 557         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strnz(expr, llen); } while (0)
 558
 559 static __attribute__((unused))
 560 int expect_strnz(const char *expr, int llen)
 561 {
 562         int ret = 0;
 563
 564         llen += printf(" = <%s> ", expr ? expr : "(null)");
 565         if (!expr) {
 566                 ret = 1;
 567                 result(llen, FAIL);
 568         } else {
 569                 result(llen, OK);
 570         }
 571         return ret;
 572 }
 573
 574
 575 #define EXPECT_STREQ(cond, expr, cmp)                           \
 576         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_streq(expr, llen, cmp); } while (0)
 577
 578 static __attribute__((unused))
 579 int expect_streq(const char *expr, int llen, const char *cmp)
 580 {
 581         int ret = 0;
 582
 583         llen += printf(" = <%s> ", expr);
 584         if (strcmp(expr, cmp) != 0) {
 585                 ret = 1;
 586                 result(llen, FAIL);
 587         } else {
 588                 result(llen, OK);
 589         }
 590         return ret;
 591 }
 592
 593
 594 #define EXPECT_STRNE(cond, expr, cmp)                           \
 595         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strne(expr, llen, cmp); } while (0)
 596
 597 static __attribute__((unused))
 598 int expect_strne(const char *expr, int llen, const char *cmp)
 599 {
 600         int ret = 0;
 601
 602         llen += printf(" = <%s> ", expr);
 603         if (strcmp(expr, cmp) == 0) {
 604                 ret = 1;
 605                 result(llen, FAIL);
 606         } else {
 607                 result(llen, OK);
 608         }
 609         return ret;
 610 }
 611
 612 #define EXPECT_STRBUFEQ(cond, expr, buf, val, cmp)                              \
 613         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_str_buf_eq(expr, buf, val, llen, cmp); } while (0)
 614
 615 static __attribute__((unused))
 616 int expect_str_buf_eq(size_t expr, const char *buf, size_t val, int llen, const char *cmp)
 617 {
 618         llen += printf(" = %lu <%s> ", (unsigned long)expr, buf);
 619         if (strcmp(buf, cmp) != 0) {
 620                 result(llen, FAIL);
 621                 return 1;
 622         }
 623         if (expr != val) {
 624                 result(llen, FAIL);
 625                 return 1;
 626         }
 627
 628         result(llen, OK);
 629         return 0;
 630 }
 631
 632 #define EXPECT_STRTOX(cond, func, input, base, expected, chars, expected_errno)                         \
 633         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strtox(llen, func, input, base, expected, chars, expected_errno); } while (0)
 634
 635 static __attribute__((unused))
 636 int expect_strtox(int llen, void *func, const char *input, int base, intmax_t expected, int expected_chars, int expected_errno)
 637 {
 638         char *endptr;
 639         int actual_errno, actual_chars;
 640         intmax_t r;
 641
 642         errno = 0;
 643         if (func == strtol) {
 644                 r = strtol(input, &endptr, base);
 645         } else if (func == strtoul) {
 646                 r = strtoul(input, &endptr, base);
 647         } else {
 648                 result(llen, FAIL);
 649                 return 1;
 650         }
 651         actual_errno = errno;
 652         actual_chars = endptr - input;
 653
 654         llen += printf(" %lld = %lld", (long long)expected, (long long)r);
 655         if (r != expected) {
 656                 result(llen, FAIL);
 657                 return 1;
 658         }
 659         if (expected_chars == -1) {
 660                 if (*endptr != '\0') {
 661                         result(llen, FAIL);
 662                         return 1;
 663                 }
 664         } else if (expected_chars != actual_chars) {
 665                 result(llen, FAIL);
 666                 return 1;
 667         }
 668         if (actual_errno != expected_errno) {
 669                 result(llen, FAIL);
 670                 return 1;
 671         }
 672
 673         result(llen, OK);
 674         return 0;
 675 }
 676
 677 /* declare tests based on line numbers. There must be exactly one test per line. */
 678 #define CASE_TEST(name) \
 679         case __LINE__: llen += printf("%d %s", test, #name);
 680
 681 /* constructors validate that they are executed in definition order */
 682 __attribute__((constructor))
 683 static void constructor1(void)
 684 {
 685         constructor_test_value = 1;
 686 }
 687
 688 __attribute__((constructor))
 689 static void constructor2(int argc, char **argv, char **envp)
 690 {
 691         if (argc && argv && envp)
 692                 constructor_test_value *= 2;
 693 }
 694
 695 int run_startup(int min, int max)
 696 {
 697         int test;
 698         int ret = 0;
 699         /* kernel at least passes HOME and TERM, shell passes more */
 700         int env_total = 2;
 701         /* checking NULL for argv/argv0, environ and _auxv is not enough, let's compare with sbrk(0) or &end */
 702         extern char end;
 703         char *brk = sbrk(0) != (void *)-1 ? sbrk(0) : &end;
 704         /* differ from nolibc, both glibc and musl have no global _auxv */
 705         const unsigned long *test_auxv = (void *)-1;
 706 #ifdef NOLIBC
 707         test_auxv = _auxv;
 708 #endif
 709
 710         for (test = min; test >= 0 && test <= max; test++) {
 711                 int llen = 0; /* line length */
 712
 713                 /* avoid leaving empty lines below, this will insert holes into
 714                  * test numbers.
 715                  */
 716                 switch (test + __LINE__ + 1) {
 717                 CASE_TEST(argc);             EXPECT_GE(1, test_argc, 1); break;
 718                 CASE_TEST(argv_addr);        EXPECT_PTRGT(1, test_argv, brk); break;
 719                 CASE_TEST(argv_environ);     EXPECT_PTRLT(1, test_argv, environ); break;
 720                 CASE_TEST(argv_total);       EXPECT_EQ(1, environ - test_argv - 1, test_argc ?: 1); break;
 721                 CASE_TEST(argv0_addr);       EXPECT_PTRGT(1, argv0, brk); break;
 722                 CASE_TEST(argv0_str);        EXPECT_STRNZ(1, argv0 > brk ? argv0 : NULL); break;
 723                 CASE_TEST(argv0_len);        EXPECT_GE(1,  argv0 > brk ? strlen(argv0) : 0, 1); break;
 724                 CASE_TEST(environ_addr);     EXPECT_PTRGT(1, environ, brk); break;
 725                 CASE_TEST(environ_envp);     EXPECT_PTREQ(1, environ, test_envp); break;
 726                 CASE_TEST(environ_auxv);     EXPECT_PTRLT(test_auxv != (void *)-1, environ, test_auxv); break;
 727                 CASE_TEST(environ_total);    EXPECT_GE(test_auxv != (void *)-1, (void *)test_auxv - (void *)environ - 1, env_total); break;
 728                 CASE_TEST(environ_HOME);     EXPECT_PTRNZ(1, getenv("HOME")); break;
 729                 CASE_TEST(auxv_addr);        EXPECT_PTRGT(test_auxv != (void *)-1, test_auxv, brk); break;
 730                 CASE_TEST(auxv_AT_UID);      EXPECT_EQ(1, getauxval(AT_UID), getuid()); break;
 731                 CASE_TEST(constructor);      EXPECT_EQ(1, constructor_test_value, 2); break;
 732                 CASE_TEST(linkage_errno);    EXPECT_PTREQ(1, linkage_test_errno_addr(), &errno); break;
 733                 CASE_TEST(linkage_constr);   EXPECT_EQ(1, linkage_test_constructor_test_value, 6); break;
 734                 case __LINE__:
 735                         return ret; /* must be last */
 736                 /* note: do not set any defaults so as to permit holes above */
 737                 }
 738         }
 739         return ret;
 740 }
 741
 742
 743 /* used by some syscall tests below */
 744 int test_getdents64(const char *dir)
 745 {
 746         char buffer[4096];
 747         int fd, ret;
 748         int err;
 749
 750         ret = fd = open(dir, O_RDONLY | O_DIRECTORY, 0);
 751         if (ret < 0)
 752                 return ret;
 753
 754         ret = getdents64(fd, (void *)buffer, sizeof(buffer));
 755         err = errno;
 756         close(fd);
 757
 758         errno = err;
 759         return ret;
 760 }
 761
 762 int test_getpagesize(void)
 763 {
 764         int x = getpagesize();
 765         int c;
 766
 767         if (x < 0)
 768                 return x;
 769
 770 #if defined(__x86_64__) || defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)
 771         /*
 772          * x86 family is always 4K page.
 773          */
 774         c = (x == 4096);
 775 #elif defined(__aarch64__)
 776         /*
 777          * Linux aarch64 supports three values of page size: 4K, 16K, and 64K
 778          * which are selected at kernel compilation time.
 779          */
 780         c = (x == 4096 || x == (16 * 1024) || x == (64 * 1024));
 781 #else
 782         /*
 783          * Assuming other architectures must have at least 4K page.
 784          */
 785         c = (x >= 4096);
 786 #endif
 787
 788         return !c;
 789 }
 790
 791 int test_fork(void)
 792 {
 793         int status;
 794         pid_t pid;
 795
 796         /* flush the printf buffer to avoid child flush it */
 797         fflush(stdout);
 798         fflush(stderr);
 799
 800         pid = fork();
 801
 802         switch (pid) {
 803         case -1:
 804                 return 1;
 805
 806         case 0:
 807                 exit(123);
 808
 809         default:
 810                 pid = waitpid(pid, &status, 0);
 811
 812                 return pid == -1 || !WIFEXITED(status) || WEXITSTATUS(status) != 123;
 813         }
 814 }
 815
 816 int test_stat_timestamps(void)
 817 {
 818         struct stat st;
 819
 820         if (sizeof(st.st_atim.tv_sec) != sizeof(st.st_atime))
 821                 return 1;
 822
 823         if (stat("/proc/self/", &st) && stat(argv0, &st) && stat("/", &st))
 824                 return 1;
 825
 826         if (st.st_atim.tv_sec != st.st_atime || st.st_atim.tv_nsec > 1000000000)
 827                 return 1;
 828
 829         if (st.st_mtim.tv_sec != st.st_mtime || st.st_mtim.tv_nsec > 1000000000)
 830                 return 1;
 831
 832         if (st.st_ctim.tv_sec != st.st_ctime || st.st_ctim.tv_nsec > 1000000000)
 833                 return 1;
 834
 835         return 0;
 836 }
 837
 838 int test_uname(void)
 839 {
 840         struct utsname buf;
 841         char osrelease[sizeof(buf.release)];
 842         ssize_t r;
 843         int fd;
 844
 845         memset(&buf.domainname, 'P', sizeof(buf.domainname));
 846
 847         if (uname(&buf))
 848                 return 1;
 849
 850         if (strncmp("Linux", buf.sysname, sizeof(buf.sysname)))
 851                 return 1;
 852
 853         fd = open("/proc/sys/kernel/osrelease", O_RDONLY);
 854         if (fd == -1)
 855                 return 1;
 856
 857         r = read(fd, osrelease, sizeof(osrelease));
 858         if (r == -1)
 859                 return 1;
 860
 861         close(fd);
 862
 863         if (osrelease[r - 1] == '\n')
 864                 r--;
 865
 866         /* Validate one of the later fields to ensure field sizes are correct */
 867         if (strncmp(osrelease, buf.release, r))
 868                 return 1;
 869
 870         /* Ensure the field domainname is set, it is missing from struct old_utsname */
 871         if (strnlen(buf.domainname, sizeof(buf.domainname)) == sizeof(buf.domainname))
 872                 return 1;
 873
 874         return 0;
 875 }
 876
 877 int test_mmap_munmap(void)
 878 {
 879         int ret, fd, i, page_size;
 880         void *mem;
 881         size_t file_size, length;
 882         off_t offset, pa_offset;
 883         struct stat stat_buf;
 884         const char * const files[] = {
 885                 "/dev/zero",
 886                 "/proc/1/exe", "/proc/self/exe",
 887                 argv0,
 888                 NULL
 889         };
 890
 891         page_size = getpagesize();
 892         if (page_size < 0)
 893                 return 1;
 894
 895         /* find a right file to mmap, existed and accessible */
 896         for (i = 0; files[i] != NULL; i++) {
 897                 ret = fd = open(files[i], O_RDONLY);
 898                 if (ret == -1)
 899                         continue;
 900                 else
 901                         break;
 902         }
 903         if (ret == -1)
 904                 return 1;
 905
 906         ret = stat(files[i], &stat_buf);
 907         if (ret == -1)
 908                 goto end;
 909
 910         /* file size of the special /dev/zero is 0, let's assign one manually */
 911         if (i == 0)
 912                 file_size = 3*page_size;
 913         else
 914                 file_size = stat_buf.st_size;
 915
 916         offset = file_size - 1;
 917         if (offset < 0)
 918                 offset = 0;
 919         length = file_size - offset;
 920         pa_offset = offset & ~(page_size - 1);
 921
 922         mem = mmap(NULL, length + offset - pa_offset, PROT_READ, MAP_SHARED, fd, pa_offset);
 923         if (mem == MAP_FAILED) {
 924                 ret = 1;
 925                 goto end;
 926         }
 927
 928         ret = munmap(mem, length + offset - pa_offset);
 929
 930 end:
 931         close(fd);
 932         return !!ret;
 933 }
 934
 935 int test_pipe(void)
 936 {
 937         const char *const msg = "hello, nolibc";
 938         int pipefd[2];
 939         char buf[32];
 940         size_t len;
 941
 942         if (pipe(pipefd) == -1)
 943                 return 1;
 944
 945         write(pipefd[1], msg, strlen(msg));
 946         close(pipefd[1]);
 947         len = read(pipefd[0], buf, sizeof(buf));
 948         close(pipefd[0]);
 949
 950         if (len != strlen(msg))
 951                 return 1;
 952
 953         return !!memcmp(buf, msg, len);
 954 }
 955
 956 int test_rlimit(void)
 957 {
 958         struct rlimit rlim = {
 959                 .rlim_cur = 1 << 20,
 960                 .rlim_max = 1 << 21,
 961         };
 962         int ret;
 963
 964         ret = setrlimit(RLIMIT_CORE, &rlim);
 965         if (ret)
 966                 return -1;
 967
 968         rlim.rlim_cur = 0;
 969         rlim.rlim_max = 0;
 970
 971         ret = getrlimit(RLIMIT_CORE, &rlim);
 972         if (ret)
 973                 return -1;
 974
 975         if (rlim.rlim_cur != 1 << 20)
 976                 return -1;
 977         if (rlim.rlim_max != 1 << 21)
 978                 return -1;
 979
 980         return 0;
 981 }
 982
 983
 984 /* Run syscall tests between IDs <min> and <max>.
 985  * Return 0 on success, non-zero on failure.
 986  */
 987 int run_syscall(int min, int max)
 988 {
 989         struct timeval tv;
 990         struct timezone tz;
 991         struct stat stat_buf;
 992         int euid0;
 993         int proc;
 994         int test;
 995         int tmp;
 996         int ret = 0;
 997         void *p1, *p2;
 998         int has_gettid = 1;
 999         int has_brk;
1000
1001         /* <proc> indicates whether or not /proc is mounted */
1002         proc = stat("/proc", &stat_buf) == 0;
1003
1004         /* this will be used to skip certain tests that can't be run unprivileged */
1005         euid0 = geteuid() == 0;
1006
1007         /* from 2.30, glibc provides gettid() */
1008 #if defined(__GLIBC_MINOR__) && defined(__GLIBC__)
1009         has_gettid = __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 30);
1010 #endif
1011
1012         /* on musl setting brk()/sbrk() always fails */
1013         has_brk = brk(0) == 0;
1014
1015         for (test = min; test >= 0 && test <= max; test++) {
1016                 int llen = 0; /* line length */
1017
1018                 /* avoid leaving empty lines below, this will insert holes into
1019                  * test numbers.
1020                  */
1021                 switch (test + __LINE__ + 1) {
1022                 CASE_TEST(getpid);            EXPECT_SYSNE(1, getpid(), -1); break;
1023                 CASE_TEST(getppid);           EXPECT_SYSNE(1, getppid(), -1); break;
1024                 CASE_TEST(gettid);            EXPECT_SYSNE(has_gettid, gettid(), -1); break;
1025                 CASE_TEST(getpgid_self);      EXPECT_SYSNE(1, getpgid(0), -1); break;
1026                 CASE_TEST(getpgid_bad);       EXPECT_SYSER(1, getpgid(-1), -1, ESRCH); break;
1027                 CASE_TEST(kill_0);            EXPECT_SYSZR(1, kill(getpid(), 0)); break;
1028                 CASE_TEST(kill_CONT);         EXPECT_SYSZR(1, kill(getpid(), 0)); break;
1029                 CASE_TEST(kill_BADPID);       EXPECT_SYSER(1, kill(INT_MAX, 0), -1, ESRCH); break;
1030                 CASE_TEST(sbrk_0);            EXPECT_PTRNE(has_brk, sbrk(0), (void *)-1); break;
1031                 CASE_TEST(sbrk);              if ((p1 = p2 = sbrk(4096)) != (void *)-1) p2 = sbrk(-4096); EXPECT_SYSZR(has_brk, (p2 == (void *)-1) || p2 == p1); break;
1032                 CASE_TEST(brk);               EXPECT_SYSZR(has_brk, brk(sbrk(0))); break;
1033                 CASE_TEST(chdir_root);        EXPECT_SYSZR(1, chdir("/")); chdir(getenv("PWD")); break;
1034                 CASE_TEST(chdir_dot);         EXPECT_SYSZR(1, chdir(".")); break;
1035                 CASE_TEST(chdir_blah);        EXPECT_SYSER(1, chdir("/blah"), -1, ENOENT); break;
1036                 CASE_TEST(chmod_argv0);       EXPECT_SYSZR(1, chmod(argv0, 0555)); break;
1037                 CASE_TEST(chmod_self);        EXPECT_SYSER(proc, chmod("/proc/self", 0555), -1, EPERM); break;
1038                 CASE_TEST(chown_self);        EXPECT_SYSER(proc, chown("/proc/self", 0, 0), -1, EPERM); break;
1039                 CASE_TEST(chroot_root);       EXPECT_SYSZR(euid0, chroot("/")); break;
1040                 CASE_TEST(chroot_blah);       EXPECT_SYSER(1, chroot("/proc/self/blah"), -1, ENOENT); break;
1041                 CASE_TEST(chroot_exe);        EXPECT_SYSER(1, chroot(argv0), -1, ENOTDIR); break;
1042                 CASE_TEST(close_m1);          EXPECT_SYSER(1, close(-1), -1, EBADF); break;
1043                 CASE_TEST(close_dup);         EXPECT_SYSZR(1, close(dup(0))); break;
1044                 CASE_TEST(dup_0);             tmp = dup(0);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
1045                 CASE_TEST(dup_m1);            tmp = dup(-1); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
1046                 CASE_TEST(dup2_0);            tmp = dup2(0, 100);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
1047                 CASE_TEST(dup2_m1);           tmp = dup2(-1, 100); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
1048                 CASE_TEST(dup3_0);            tmp = dup3(0, 100, 0);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
1049                 CASE_TEST(dup3_m1);           tmp = dup3(-1, 100, 0); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
1050                 CASE_TEST(execve_root);       EXPECT_SYSER(1, execve("/", (char*[]){ [0] = "/", [1] = NULL }, NULL), -1, EACCES); break;
1051                 CASE_TEST(fork);              EXPECT_SYSZR(1, test_fork()); break;
1052                 CASE_TEST(getdents64_root);   EXPECT_SYSNE(1, test_getdents64("/"), -1); break;
1053                 CASE_TEST(getdents64_null);   EXPECT_SYSER(1, test_getdents64("/dev/null"), -1, ENOTDIR); break;
1054                 CASE_TEST(gettimeofday_tv);   EXPECT_SYSZR(1, gettimeofday(&tv, NULL)); break;
1055                 CASE_TEST(gettimeofday_tv_tz);EXPECT_SYSZR(1, gettimeofday(&tv, &tz)); break;
1056                 CASE_TEST(getpagesize);       EXPECT_SYSZR(1, test_getpagesize()); break;
1057                 CASE_TEST(ioctl_tiocinq);     EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
1058                 CASE_TEST(link_root1);        EXPECT_SYSER(1, link("/", "/"), -1, EEXIST); break;
1059                 CASE_TEST(link_blah);         EXPECT_SYSER(1, link("/proc/self/blah", "/blah"), -1, ENOENT); break;
1060                 CASE_TEST(link_dir);          EXPECT_SYSER(euid0, link("/", "/blah"), -1, EPERM); break;
1061                 CASE_TEST(link_cross);        EXPECT_SYSER(proc, link("/proc/self/cmdline", "/blah"), -1, EXDEV); break;
1062                 CASE_TEST(lseek_m1);          EXPECT_SYSER(1, lseek(-1, 0, SEEK_SET), -1, EBADF); break;
1063                 CASE_TEST(lseek_0);           EXPECT_SYSER(1, lseek(0, 0, SEEK_SET), -1, ESPIPE); break;
1064                 CASE_TEST(mkdir_root);        EXPECT_SYSER(1, mkdir("/", 0755), -1, EEXIST); break;
1065                 CASE_TEST(mmap_bad);          EXPECT_PTRER(1, mmap(NULL, 0, PROT_READ, MAP_PRIVATE, 0, 0), MAP_FAILED, EINVAL); break;
1066                 CASE_TEST(munmap_bad);        EXPECT_SYSER(1, munmap(NULL, 0), -1, EINVAL); break;
1067                 CASE_TEST(mmap_munmap_good);  EXPECT_SYSZR(1, test_mmap_munmap()); break;
1068                 CASE_TEST(open_tty);          EXPECT_SYSNE(1, tmp = open("/dev/null", 0), -1); if (tmp != -1) close(tmp); break;
1069                 CASE_TEST(open_blah);         EXPECT_SYSER(1, tmp = open("/proc/self/blah", 0), -1, ENOENT); if (tmp != -1) close(tmp); break;
1070                 CASE_TEST(pipe);              EXPECT_SYSZR(1, test_pipe()); break;
1071                 CASE_TEST(poll_null);         EXPECT_SYSZR(1, poll(NULL, 0, 0)); break;
1072                 CASE_TEST(poll_stdout);       EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break;
1073                 CASE_TEST(poll_fault);        EXPECT_SYSER(1, poll(NULL, 1, 0), -1, EFAULT); break;
1074                 CASE_TEST(prctl);             EXPECT_SYSER(1, prctl(PR_SET_NAME, (unsigned long)NULL, 0, 0, 0), -1, EFAULT); break;
1075                 CASE_TEST(read_badf);         EXPECT_SYSER(1, read(-1, &tmp, 1), -1, EBADF); break;
1076                 CASE_TEST(rlimit);            EXPECT_SYSZR(1, test_rlimit()); break;
1077                 CASE_TEST(rmdir_blah);        EXPECT_SYSER(1, rmdir("/blah"), -1, ENOENT); break;
1078                 CASE_TEST(sched_yield);       EXPECT_SYSZR(1, sched_yield()); break;
1079                 CASE_TEST(select_null);       EXPECT_SYSZR(1, ({ struct timeval tv = { 0 }; select(0, NULL, NULL, NULL, &tv); })); break;
1080                 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;
1081                 CASE_TEST(select_fault);      EXPECT_SYSER(1, select(1, (void *)1, NULL, NULL, 0), -1, EFAULT); break;
1082                 CASE_TEST(stat_blah);         EXPECT_SYSER(1, stat("/proc/self/blah", &stat_buf), -1, ENOENT); break;
1083                 CASE_TEST(stat_fault);        EXPECT_SYSER(1, stat(NULL, &stat_buf), -1, EFAULT); break;
1084                 CASE_TEST(stat_timestamps);   EXPECT_SYSZR(1, test_stat_timestamps()); break;
1085                 CASE_TEST(symlink_root);      EXPECT_SYSER(1, symlink("/", "/"), -1, EEXIST); break;
1086                 CASE_TEST(uname);             EXPECT_SYSZR(proc, test_uname()); break;
1087                 CASE_TEST(uname_fault);       EXPECT_SYSER(1, uname(NULL), -1, EFAULT); break;
1088                 CASE_TEST(unlink_root);       EXPECT_SYSER(1, unlink("/"), -1, EISDIR); break;
1089                 CASE_TEST(unlink_blah);       EXPECT_SYSER(1, unlink("/proc/self/blah"), -1, ENOENT); break;
1090                 CASE_TEST(wait_child);        EXPECT_SYSER(1, wait(&tmp), -1, ECHILD); break;
1091                 CASE_TEST(waitpid_min);       EXPECT_SYSER(1, waitpid(INT_MIN, &tmp, WNOHANG), -1, ESRCH); break;
1092                 CASE_TEST(waitpid_child);     EXPECT_SYSER(1, waitpid(getpid(), &tmp, WNOHANG), -1, ECHILD); break;
1093                 CASE_TEST(write_badf);        EXPECT_SYSER(1, write(-1, &tmp, 1), -1, EBADF); break;
1094                 CASE_TEST(write_zero);        EXPECT_SYSZR(1, write(1, &tmp, 0)); break;
1095                 CASE_TEST(syscall_noargs);    EXPECT_SYSEQ(1, syscall(__NR_getpid), getpid()); break;
1096                 CASE_TEST(syscall_args);      EXPECT_SYSER(1, syscall(__NR_statx, 0, NULL, 0, 0, NULL), -1, EFAULT); break;
1097                 case __LINE__:
1098                         return ret; /* must be last */
1099                 /* note: do not set any defaults so as to permit holes above */
1100                 }
1101         }
1102         return ret;
1103 }
1104
1105 int run_stdlib(int min, int max)
1106 {
1107         int test;
1108         int ret = 0;
1109
1110         for (test = min; test >= 0 && test <= max; test++) {
1111                 int llen = 0; /* line length */
1112
1113                 /* For functions that take a long buffer, like strlcat()
1114                  * Add some more chars after the \0, to test functions that overwrite the buffer set
1115                  * the \0 at the exact right position.
1116                  */
1117                 char buf[10] = "test123456";
1118                 buf[4] = '\0';
1119
1120
1121                 /* avoid leaving empty lines below, this will insert holes into
1122                  * test numbers.
1123                  */
1124                 switch (test + __LINE__ + 1) {
1125                 CASE_TEST(getenv_TERM);        EXPECT_STRNZ(1, getenv("TERM")); break;
1126                 CASE_TEST(getenv_blah);        EXPECT_STRZR(1, getenv("blah")); break;
1127                 CASE_TEST(setcmp_blah_blah);   EXPECT_EQ(1, strcmp("blah", "blah"), 0); break;
1128                 CASE_TEST(setcmp_blah_blah2);  EXPECT_NE(1, strcmp("blah", "blah2"), 0); break;
1129                 CASE_TEST(setncmp_blah_blah);  EXPECT_EQ(1, strncmp("blah", "blah", 10), 0); break;
1130                 CASE_TEST(setncmp_blah_blah4); EXPECT_EQ(1, strncmp("blah", "blah4", 4), 0); break;
1131                 CASE_TEST(setncmp_blah_blah5); EXPECT_NE(1, strncmp("blah", "blah5", 5), 0); break;
1132                 CASE_TEST(setncmp_blah_blah6); EXPECT_NE(1, strncmp("blah", "blah6", 6), 0); break;
1133                 CASE_TEST(strchr_foobar_o);    EXPECT_STREQ(1, strchr("foobar", 'o'), "oobar"); break;
1134                 CASE_TEST(strchr_foobar_z);    EXPECT_STRZR(1, strchr("foobar", 'z')); break;
1135                 CASE_TEST(strrchr_foobar_o);   EXPECT_STREQ(1, strrchr("foobar", 'o'), "obar"); break;
1136                 CASE_TEST(strrchr_foobar_z);   EXPECT_STRZR(1, strrchr("foobar", 'z')); break;
1137                 CASE_TEST(strlcat_0);          EXPECT_STRBUFEQ(is_nolibc, strlcat(buf, "bar", 0), buf, 3, "test"); break;
1138                 CASE_TEST(strlcat_1);          EXPECT_STRBUFEQ(is_nolibc, strlcat(buf, "bar", 1), buf, 4, "test"); break;
1139                 CASE_TEST(strlcat_5);          EXPECT_STRBUFEQ(is_nolibc, strlcat(buf, "bar", 5), buf, 7, "test"); break;
1140                 CASE_TEST(strlcat_6);          EXPECT_STRBUFEQ(is_nolibc, strlcat(buf, "bar", 6), buf, 7, "testb"); break;
1141                 CASE_TEST(strlcat_7);          EXPECT_STRBUFEQ(is_nolibc, strlcat(buf, "bar", 7), buf, 7, "testba"); break;
1142                 CASE_TEST(strlcat_8);          EXPECT_STRBUFEQ(is_nolibc, strlcat(buf, "bar", 8), buf, 7, "testbar"); break;
1143                 CASE_TEST(strlcpy_0);          EXPECT_STRBUFEQ(is_nolibc, strlcpy(buf, "bar", 0), buf, 3, "test"); break;
1144                 CASE_TEST(strlcpy_1);          EXPECT_STRBUFEQ(is_nolibc, strlcpy(buf, "bar", 1), buf, 3, ""); break;
1145                 CASE_TEST(strlcpy_2);          EXPECT_STRBUFEQ(is_nolibc, strlcpy(buf, "bar", 2), buf, 3, "b"); break;
1146                 CASE_TEST(strlcpy_3);          EXPECT_STRBUFEQ(is_nolibc, strlcpy(buf, "bar", 3), buf, 3, "ba"); break;
1147                 CASE_TEST(strlcpy_4);          EXPECT_STRBUFEQ(is_nolibc, strlcpy(buf, "bar", 4), buf, 3, "bar"); break;
1148                 CASE_TEST(memcmp_20_20);       EXPECT_EQ(1, memcmp("aaa\x20", "aaa\x20", 4), 0); break;
1149                 CASE_TEST(memcmp_20_60);       EXPECT_LT(1, memcmp("aaa\x20", "aaa\x60", 4), 0); break;
1150                 CASE_TEST(memcmp_60_20);       EXPECT_GT(1, memcmp("aaa\x60", "aaa\x20", 4), 0); break;
1151                 CASE_TEST(memcmp_20_e0);       EXPECT_LT(1, memcmp("aaa\x20", "aaa\xe0", 4), 0); break;
1152                 CASE_TEST(memcmp_e0_20);       EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x20", 4), 0); break;
1153                 CASE_TEST(memcmp_80_e0);       EXPECT_LT(1, memcmp("aaa\x80", "aaa\xe0", 4), 0); break;
1154                 CASE_TEST(memcmp_e0_80);       EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x80", 4), 0); break;
1155                 CASE_TEST(limit_int8_max);          EXPECT_EQ(1, INT8_MAX,         (int8_t)          0x7f); break;
1156                 CASE_TEST(limit_int8_min);          EXPECT_EQ(1, INT8_MIN,         (int8_t)          0x80); break;
1157                 CASE_TEST(limit_uint8_max);         EXPECT_EQ(1, UINT8_MAX,        (uint8_t)         0xff); break;
1158                 CASE_TEST(limit_int16_max);         EXPECT_EQ(1, INT16_MAX,        (int16_t)         0x7fff); break;
1159                 CASE_TEST(limit_int16_min);         EXPECT_EQ(1, INT16_MIN,        (int16_t)         0x8000); break;
1160                 CASE_TEST(limit_uint16_max);        EXPECT_EQ(1, UINT16_MAX,       (uint16_t)        0xffff); break;
1161                 CASE_TEST(limit_int32_max);         EXPECT_EQ(1, INT32_MAX,        (int32_t)         0x7fffffff); break;
1162                 CASE_TEST(limit_int32_min);         EXPECT_EQ(1, INT32_MIN,        (int32_t)         0x80000000); break;
1163                 CASE_TEST(limit_uint32_max);        EXPECT_EQ(1, UINT32_MAX,       (uint32_t)        0xffffffff); break;
1164                 CASE_TEST(limit_int64_max);         EXPECT_EQ(1, INT64_MAX,        (int64_t)         0x7fffffffffffffff); break;
1165                 CASE_TEST(limit_int64_min);         EXPECT_EQ(1, INT64_MIN,        (int64_t)         0x8000000000000000); break;
1166                 CASE_TEST(limit_uint64_max);        EXPECT_EQ(1, UINT64_MAX,       (uint64_t)        0xffffffffffffffff); break;
1167                 CASE_TEST(limit_int_least8_max);    EXPECT_EQ(1, INT_LEAST8_MAX,   (int_least8_t)    0x7f); break;
1168                 CASE_TEST(limit_int_least8_min);    EXPECT_EQ(1, INT_LEAST8_MIN,   (int_least8_t)    0x80); break;
1169                 CASE_TEST(limit_uint_least8_max);   EXPECT_EQ(1, UINT_LEAST8_MAX,  (uint_least8_t)   0xff); break;
1170                 CASE_TEST(limit_int_least16_max);   EXPECT_EQ(1, INT_LEAST16_MAX,  (int_least16_t)   0x7fff); break;
1171                 CASE_TEST(limit_int_least16_min);   EXPECT_EQ(1, INT_LEAST16_MIN,  (int_least16_t)   0x8000); break;
1172                 CASE_TEST(limit_uint_least16_max);  EXPECT_EQ(1, UINT_LEAST16_MAX, (uint_least16_t)  0xffff); break;
1173                 CASE_TEST(limit_int_least32_max);   EXPECT_EQ(1, INT_LEAST32_MAX,  (int_least32_t)   0x7fffffff); break;
1174                 CASE_TEST(limit_int_least32_min);   EXPECT_EQ(1, INT_LEAST32_MIN,  (int_least32_t)   0x80000000); break;
1175                 CASE_TEST(limit_uint_least32_max);  EXPECT_EQ(1, UINT_LEAST32_MAX, (uint_least32_t)  0xffffffffU); break;
1176                 CASE_TEST(limit_int_least64_min);   EXPECT_EQ(1, INT_LEAST64_MIN,  (int_least64_t)   0x8000000000000000LL); break;
1177                 CASE_TEST(limit_int_least64_max);   EXPECT_EQ(1, INT_LEAST64_MAX,  (int_least64_t)   0x7fffffffffffffffLL); break;
1178                 CASE_TEST(limit_uint_least64_max);  EXPECT_EQ(1, UINT_LEAST64_MAX, (uint_least64_t)  0xffffffffffffffffULL); break;
1179                 CASE_TEST(limit_int_fast8_max);     EXPECT_EQ(1, INT_FAST8_MAX,    (int_fast8_t)     0x7f); break;
1180                 CASE_TEST(limit_int_fast8_min);     EXPECT_EQ(1, INT_FAST8_MIN,    (int_fast8_t)     0x80); break;
1181                 CASE_TEST(limit_uint_fast8_max);    EXPECT_EQ(1, UINT_FAST8_MAX,   (uint_fast8_t)    0xff); break;
1182                 CASE_TEST(limit_int_fast16_min);    EXPECT_EQ(1, INT_FAST16_MIN,   (int_fast16_t)    SINT_MIN_OF_TYPE(int_fast16_t)); break;
1183                 CASE_TEST(limit_int_fast16_max);    EXPECT_EQ(1, INT_FAST16_MAX,   (int_fast16_t)    SINT_MAX_OF_TYPE(int_fast16_t)); break;
1184                 CASE_TEST(limit_uint_fast16_max);   EXPECT_EQ(1, UINT_FAST16_MAX,  (uint_fast16_t)   UINTPTR_MAX); break;
1185                 CASE_TEST(limit_int_fast32_min);    EXPECT_EQ(1, INT_FAST32_MIN,   (int_fast32_t)    SINT_MIN_OF_TYPE(int_fast32_t)); break;
1186                 CASE_TEST(limit_int_fast32_max);    EXPECT_EQ(1, INT_FAST32_MAX,   (int_fast32_t)    SINT_MAX_OF_TYPE(int_fast32_t)); break;
1187                 CASE_TEST(limit_uint_fast32_max);   EXPECT_EQ(1, UINT_FAST32_MAX,  (uint_fast32_t)   UINTPTR_MAX); break;
1188                 CASE_TEST(limit_int_fast64_min);    EXPECT_EQ(1, INT_FAST64_MIN,   (int_fast64_t)    INT64_MIN); break;
1189                 CASE_TEST(limit_int_fast64_max);    EXPECT_EQ(1, INT_FAST64_MAX,   (int_fast64_t)    INT64_MAX); break;
1190                 CASE_TEST(limit_uint_fast64_max);   EXPECT_EQ(1, UINT_FAST64_MAX,  (uint_fast64_t)   UINT64_MAX); break;
1191                 CASE_TEST(sizeof_long_sane);        EXPECT_EQ(1, sizeof(long) == 8 || sizeof(long) == 4, 1); break;
1192                 CASE_TEST(limit_intptr_min);        EXPECT_EQ(1, INTPTR_MIN,  sizeof(long) == 8 ? (intptr_t)  0x8000000000000000LL  : (intptr_t)  0x80000000); break;
1193                 CASE_TEST(limit_intptr_max);        EXPECT_EQ(1, INTPTR_MAX,  sizeof(long) == 8 ? (intptr_t)  0x7fffffffffffffffLL  : (intptr_t)  0x7fffffff); break;
1194                 CASE_TEST(limit_uintptr_max);       EXPECT_EQ(1, UINTPTR_MAX, sizeof(long) == 8 ? (uintptr_t) 0xffffffffffffffffULL : (uintptr_t) 0xffffffffU); break;
1195                 CASE_TEST(limit_ptrdiff_min);       EXPECT_EQ(1, PTRDIFF_MIN, sizeof(long) == 8 ? (ptrdiff_t) 0x8000000000000000LL  : (ptrdiff_t) 0x80000000); break;
1196                 CASE_TEST(limit_ptrdiff_max);       EXPECT_EQ(1, PTRDIFF_MAX, sizeof(long) == 8 ? (ptrdiff_t) 0x7fffffffffffffffLL  : (ptrdiff_t) 0x7fffffff); break;
1197                 CASE_TEST(limit_size_max);          EXPECT_EQ(1, SIZE_MAX,    sizeof(long) == 8 ? (size_t)    0xffffffffffffffffULL : (size_t)    0xffffffffU); break;
1198                 CASE_TEST(strtol_simple);           EXPECT_STRTOX(1, strtol, "35", 10, 35, -1, 0); break;
1199                 CASE_TEST(strtol_positive);         EXPECT_STRTOX(1, strtol, "+35", 10, 35, -1, 0); break;
1200                 CASE_TEST(strtol_negative);         EXPECT_STRTOX(1, strtol, "-35", 10, -35, -1, 0); break;
1201                 CASE_TEST(strtol_hex_auto);         EXPECT_STRTOX(1, strtol, "0xFF", 0, 255, -1, 0); break;
1202                 CASE_TEST(strtol_base36);           EXPECT_STRTOX(1, strtol, "12yZ", 36, 50507, -1, 0); break;
1203                 CASE_TEST(strtol_cutoff);           EXPECT_STRTOX(1, strtol, "1234567890", 8, 342391, 7, 0); break;
1204                 CASE_TEST(strtol_octal_auto);       EXPECT_STRTOX(1, strtol, "011", 0, 9, -1, 0); break;
1205                 CASE_TEST(strtol_hex_00);           EXPECT_STRTOX(1, strtol, "0x00", 16, 0, -1, 0); break;
1206                 CASE_TEST(strtol_hex_FF);           EXPECT_STRTOX(1, strtol, "FF", 16, 255, -1, 0); break;
1207                 CASE_TEST(strtol_hex_ff);           EXPECT_STRTOX(1, strtol, "ff", 16, 255, -1, 0); break;
1208                 CASE_TEST(strtol_hex_prefix);       EXPECT_STRTOX(1, strtol, "0xFF", 16, 255, -1, 0); break;
1209                 CASE_TEST(strtol_trailer);          EXPECT_STRTOX(1, strtol, "35foo", 10, 35, 2, 0); break;
1210                 CASE_TEST(strtol_overflow);         EXPECT_STRTOX(1, strtol, "0x8000000000000000", 16, LONG_MAX, -1, ERANGE); break;
1211                 CASE_TEST(strtol_underflow);        EXPECT_STRTOX(1, strtol, "-0x8000000000000001", 16, LONG_MIN, -1, ERANGE); break;
1212                 CASE_TEST(strtoul_negative);        EXPECT_STRTOX(1, strtoul, "-0x1", 16, ULONG_MAX, 4, 0); break;
1213                 CASE_TEST(strtoul_overflow);        EXPECT_STRTOX(1, strtoul, "0x10000000000000000", 16, ULONG_MAX, -1, ERANGE); break;
1214                 CASE_TEST(strerror_success);        EXPECT_STREQ(is_nolibc, strerror(0), "errno=0"); break;
1215                 CASE_TEST(strerror_EINVAL);         EXPECT_STREQ(is_nolibc, strerror(EINVAL), "errno=22"); break;
1216                 CASE_TEST(strerror_int_max);        EXPECT_STREQ(is_nolibc, strerror(INT_MAX), "errno=2147483647"); break;
1217                 CASE_TEST(strerror_int_min);        EXPECT_STREQ(is_nolibc, strerror(INT_MIN), "errno=-2147483648"); break;
1218
1219                 case __LINE__:
1220                         return ret; /* must be last */
1221                 /* note: do not set any defaults so as to permit holes above */
1222                 }
1223         }
1224         return ret;
1225 }
1226
1227 #define EXPECT_VFPRINTF(c, expected, fmt, ...)                          \
1228         ret += expect_vfprintf(llen, c, expected, fmt, ##__VA_ARGS__)
1229
1230 static int expect_vfprintf(int llen, int c, const char *expected, const char *fmt, ...)
1231 {
1232         int ret, fd;
1233         ssize_t w, r;
1234         char buf[100];
1235         FILE *memfile;
1236         va_list args;
1237
1238         fd = open("/tmp", O_TMPFILE | O_EXCL | O_RDWR, 0600);
1239         if (fd == -1) {
1240                 result(llen, SKIPPED);
1241                 return 0;
1242         }
1243
1244         memfile = fdopen(fd, "w+");
1245         if (!memfile) {
1246                 result(llen, FAIL);
1247                 return 1;
1248         }
1249
1250         va_start(args, fmt);
1251         w = vfprintf(memfile, fmt, args);
1252         va_end(args);
1253
1254         if (w != c) {
1255                 llen += printf(" written(%d) != %d", (int)w, c);
1256                 result(llen, FAIL);
1257                 return 1;
1258         }
1259
1260         fflush(memfile);
1261         lseek(fd, 0, SEEK_SET);
1262
1263         r = read(fd, buf, sizeof(buf) - 1);
1264
1265         fclose(memfile);
1266
1267         if (r != w) {
1268                 llen += printf(" written(%d) != read(%d)", (int)w, (int)r);
1269                 result(llen, FAIL);
1270                 return 1;
1271         }
1272
1273         buf[r] = '\0';
1274         llen += printf(" \"%s\" = \"%s\"", expected, buf);
1275         ret = strncmp(expected, buf, c);
1276
1277         result(llen, ret ? FAIL : OK);
1278         return ret;
1279 }
1280
1281 static int run_vfprintf(int min, int max)
1282 {
1283         int test;
1284         int ret = 0;
1285
1286         for (test = min; test >= 0 && test <= max; test++) {
1287                 int llen = 0; /* line length */
1288
1289                 /* avoid leaving empty lines below, this will insert holes into
1290                  * test numbers.
1291                  */
1292                 switch (test + __LINE__ + 1) {
1293                 CASE_TEST(empty);        EXPECT_VFPRINTF(0, "", ""); break;
1294                 CASE_TEST(simple);       EXPECT_VFPRINTF(3, "foo", "foo"); break;
1295                 CASE_TEST(string);       EXPECT_VFPRINTF(3, "foo", "%s", "foo"); break;
1296                 CASE_TEST(number);       EXPECT_VFPRINTF(4, "1234", "%d", 1234); break;
1297                 CASE_TEST(negnumber);    EXPECT_VFPRINTF(5, "-1234", "%d", -1234); break;
1298                 CASE_TEST(unsigned);     EXPECT_VFPRINTF(5, "12345", "%u", 12345); break;
1299                 CASE_TEST(char);         EXPECT_VFPRINTF(1, "c", "%c", 'c'); break;
1300                 CASE_TEST(hex);          EXPECT_VFPRINTF(1, "f", "%x", 0xf); break;
1301                 CASE_TEST(pointer);      EXPECT_VFPRINTF(3, "0x1", "%p", (void *) 0x1); break;
1302                 case __LINE__:
1303                         return ret; /* must be last */
1304                 /* note: do not set any defaults so as to permit holes above */
1305                 }
1306         }
1307         return ret;
1308 }
1309
1310 static int smash_stack(void)
1311 {
1312         char buf[100];
1313         volatile char *ptr = buf;
1314         size_t i;
1315
1316         for (i = 0; i < 200; i++)
1317                 ptr[i] = 'P';
1318
1319         return 1;
1320 }
1321
1322 static int run_protection(int min __attribute__((unused)),
1323                           int max __attribute__((unused)))
1324 {
1325         pid_t pid;
1326         int llen = 0, status;
1327         struct rlimit rlimit = { 0, 0 };
1328
1329         llen += printf("0 -fstackprotector ");
1330
1331 #if !defined(_NOLIBC_STACKPROTECTOR)
1332         llen += printf("not supported");
1333         result(llen, SKIPPED);
1334         return 0;
1335 #endif
1336
1337 #if defined(_NOLIBC_STACKPROTECTOR)
1338         if (!__stack_chk_guard) {
1339                 llen += printf("__stack_chk_guard not initialized");
1340                 result(llen, FAIL);
1341                 return 1;
1342         }
1343 #endif
1344
1345         pid = -1;
1346         pid = fork();
1347
1348         switch (pid) {
1349         case -1:
1350                 llen += printf("fork()");
1351                 result(llen, FAIL);
1352                 return 1;
1353
1354         case 0:
1355                 close(STDOUT_FILENO);
1356                 close(STDERR_FILENO);
1357
1358                 prctl(PR_SET_DUMPABLE, 0, 0, 0, 0);
1359                 setrlimit(RLIMIT_CORE, &rlimit);
1360                 smash_stack();
1361                 return 1;
1362
1363         default:
1364                 pid = waitpid(pid, &status, 0);
1365
1366                 if (pid == -1 || !WIFSIGNALED(status) || WTERMSIG(status) != SIGABRT) {
1367                         llen += printf("waitpid()");
1368                         result(llen, FAIL);
1369                         return 1;
1370                 }
1371                 result(llen, OK);
1372                 return 0;
1373         }
1374 }
1375
1376 /* prepare what needs to be prepared for pid 1 (stdio, /dev, /proc, etc) */
1377 int prepare(void)
1378 {
1379         struct stat stat_buf;
1380
1381         /* It's possible that /dev doesn't even exist or was not mounted, so
1382          * we'll try to create it, mount it, or create minimal entries into it.
1383          * We want at least /dev/null and /dev/console.
1384          */
1385         if (stat("/dev/.", &stat_buf) == 0 || mkdir("/dev", 0755) == 0) {
1386                 if (stat("/dev/console", &stat_buf) != 0 ||
1387                     stat("/dev/null", &stat_buf) != 0 ||
1388                     stat("/dev/zero", &stat_buf) != 0) {
1389                         /* try devtmpfs first, otherwise fall back to manual creation */
1390                         if (mount("/dev", "/dev", "devtmpfs", 0, 0) != 0) {
1391                                 mknod("/dev/console", 0600 | S_IFCHR, makedev(5, 1));
1392                                 mknod("/dev/null",    0666 | S_IFCHR, makedev(1, 3));
1393                                 mknod("/dev/zero",    0666 | S_IFCHR, makedev(1, 5));
1394                         }
1395                 }
1396         }
1397
1398         /* If no /dev/console was found before calling init, stdio is closed so
1399          * we need to reopen it from /dev/console. If it failed above, it will
1400          * still fail here and we cannot emit a message anyway.
1401          */
1402         if (close(dup(1)) == -1) {
1403                 int fd = open("/dev/console", O_RDWR);
1404
1405                 if (fd >= 0) {
1406                         if (fd != 0)
1407                                 dup2(fd, 0);
1408                         if (fd != 1)
1409                                 dup2(fd, 1);
1410                         if (fd != 2)
1411                                 dup2(fd, 2);
1412                         if (fd > 2)
1413                                 close(fd);
1414                         puts("\nSuccessfully reopened /dev/console.");
1415                 }
1416         }
1417
1418         /* try to mount /proc if not mounted. Silently fail otherwise */
1419         if (stat("/proc/.", &stat_buf) == 0 || mkdir("/proc", 0755) == 0) {
1420                 if (stat("/proc/self", &stat_buf) != 0) {
1421                         /* If not mountable, remove /proc completely to avoid misuse */
1422                         if (mount("none", "/proc", "proc", 0, 0) != 0)
1423                                 rmdir("/proc");
1424                 }
1425         }
1426
1427         /* some tests rely on a writable /tmp */
1428         mkdir("/tmp", 0755);
1429
1430         return 0;
1431 }
1432
1433 /* This is the definition of known test names, with their functions */
1434 static const struct test test_names[] = {
1435         /* add new tests here */
1436         { .name = "startup",    .func = run_startup    },
1437         { .name = "syscall",    .func = run_syscall    },
1438         { .name = "stdlib",     .func = run_stdlib     },
1439         { .name = "vfprintf",   .func = run_vfprintf   },
1440         { .name = "protection", .func = run_protection },
1441         { 0 }
1442 };
1443
1444 static int is_setting_valid(char *test)
1445 {
1446         int idx, len, test_len, valid = 0;
1447         char delimiter;
1448
1449         if (!test)
1450                 return valid;
1451
1452         test_len = strlen(test);
1453
1454         for (idx = 0; test_names[idx].name; idx++) {
1455                 len = strlen(test_names[idx].name);
1456                 if (test_len < len)
1457                         continue;
1458
1459                 if (strncmp(test, test_names[idx].name, len) != 0)
1460                         continue;
1461
1462                 delimiter = test[len];
1463                 if (delimiter != ':' && delimiter != ',' && delimiter != '\0')
1464                         continue;
1465
1466                 valid = 1;
1467                 break;
1468         }
1469
1470         return valid;
1471 }
1472
1473 int main(int argc, char **argv, char **envp)
1474 {
1475         int min = 0;
1476         int max = INT_MAX;
1477         int ret = 0;
1478         int err;
1479         int idx;
1480         char *test;
1481
1482         argv0 = argv[0];
1483         test_argc = argc;
1484         test_argv = argv;
1485         test_envp = envp;
1486
1487         /* when called as init, it's possible that no console was opened, for
1488          * example if no /dev file system was provided. We'll check that fd#1
1489          * was opened, and if not we'll attempt to create and open /dev/console
1490          * and /dev/null that we'll use for later tests.
1491          */
1492         if (getpid() == 1)
1493                 prepare();
1494
1495         /* the definition of a series of tests comes from either argv[1] or the
1496          * "NOLIBC_TEST" environment variable. It's made of a comma-delimited
1497          * series of test names and optional ranges:
1498          *    syscall:5-15[:.*],stdlib:8-10
1499          */
1500         test = argv[1];
1501         if (!is_setting_valid(test))
1502                 test = getenv("NOLIBC_TEST");
1503
1504         if (is_setting_valid(test)) {
1505                 char *comma, *colon, *dash, *value;
1506
1507                 do {
1508                         comma = strchr(test, ',');
1509                         if (comma)
1510                                 *(comma++) = '\0';
1511
1512                         colon = strchr(test, ':');
1513                         if (colon)
1514                                 *(colon++) = '\0';
1515
1516                         for (idx = 0; test_names[idx].name; idx++) {
1517                                 if (strcmp(test, test_names[idx].name) == 0)
1518                                         break;
1519                         }
1520
1521                         if (test_names[idx].name) {
1522                                 /* The test was named, it will be called at least
1523                                  * once. We may have an optional range at <colon>
1524                                  * here, which defaults to the full range.
1525                                  */
1526                                 do {
1527                                         min = 0; max = INT_MAX;
1528                                         value = colon;
1529                                         if (value && *value) {
1530                                                 colon = strchr(value, ':');
1531                                                 if (colon)
1532                                                         *(colon++) = '\0';
1533
1534                                                 dash = strchr(value, '-');
1535                                                 if (dash)
1536                                                         *(dash++) = '\0';
1537
1538                                                 /* support :val: :min-max: :min-: :-max: */
1539                                                 if (*value)
1540                                                         min = atoi(value);
1541                                                 if (!dash)
1542                                                         max = min;
1543                                                 else if (*dash)
1544                                                         max = atoi(dash);
1545
1546                                                 value = colon;
1547                                         }
1548
1549                                         /* now's time to call the test */
1550                                         printf("Running test '%s'\n", test_names[idx].name);
1551                                         err = test_names[idx].func(min, max);
1552                                         ret += err;
1553                                         printf("Errors during this test: %d\n\n", err);
1554                                 } while (colon && *colon);
1555                         } else
1556                                 printf("Ignoring unknown test name '%s'\n", test);
1557
1558                         test = comma;
1559                 } while (test && *test);
1560         } else {
1561                 /* no test mentioned, run everything */
1562                 for (idx = 0; test_names[idx].name; idx++) {
1563                         printf("Running test '%s'\n", test_names[idx].name);
1564                         err = test_names[idx].func(min, max);
1565                         ret += err;
1566                         printf("Errors during this test: %d\n\n", err);
1567                 }
1568         }
1569
1570         printf("Total number of errors: %d\n", ret);
1571
1572         if (getpid() == 1) {
1573                 /* we're running as init, there's no other process on the
1574                  * system, thus likely started from a VM for a quick check.
1575                  * Exiting will provoke a kernel panic that may be reported
1576                  * as an error by Qemu or the hypervisor, while stopping
1577                  * cleanly will often be reported as a success. This allows
1578                  * to use the output of this program for bisecting kernels.
1579                  */
1580                 printf("Leaving init with final status: %d\n", !!ret);
1581                 if (ret == 0)
1582                         reboot(RB_POWER_OFF);
1583 #if defined(__x86_64__)
1584                 /* QEMU started with "-device isa-debug-exit -no-reboot" will
1585                  * exit with status code 2N+1 when N is written to 0x501. We
1586                  * hard-code the syscall here as it's arch-dependent.
1587                  */
1588                 else if (syscall(__NR_ioperm, 0x501, 1, 1) == 0)
1589                         __asm__ volatile ("outb %%al, %%dx" :: "d"(0x501), "a"(0));
1590                 /* if it does nothing, fall back to the regular panic */
1591 #endif
1592         }
1593
1594         printf("Exiting with status %d\n", !!ret);
1595         return !!ret;
1596 }