1 // SPDX-License-Identifier: GPL-2.0 2 3 #define _GNU_SOURCE 4 5 /* platform-specific include files coming from the compiler */ 6 #include <limits.h> 7 8 /* libc-specific include files 9 * The program may be built in 3 ways: 10 * $(CC) -nostdlib -include /path/to/nolibc.h => NOLIBC already defined 11 * $(CC) -nostdlib -I/path/to/nolibc/sysroot => _NOLIBC_* guards are present 12 * $(CC) with default libc => NOLIBC* never defined 13 */ 14 #ifndef NOLIBC 15 #include <stdio.h> 16 #include <stdlib.h> 17 #include <string.h> 18 #ifndef _NOLIBC_STDIO_H 19 /* standard libcs need more includes */ 20 #include <linux/reboot.h> 21 #include <sys/io.h> 22 #include <sys/ioctl.h> 23 #include <sys/mount.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 <unistd.h> 38 #endif 39 #endif 40 41 /* will be used by nolibc by getenv() */ 42 char **environ; 43 44 /* definition of a series of tests */ 45 struct test { 46 const char *name; // test name 47 int (*func)(int min, int max); // handler 48 }; 49 50 #ifndef _NOLIBC_STDLIB_H 51 char *itoa(int i) 52 { 53 static char buf[12]; 54 int ret; 55 56 ret = snprintf(buf, sizeof(buf), "%d", i); 57 return (ret >= 0 && ret < sizeof(buf)) ? buf : "#err"; 58 } 59 #endif 60 61 #define CASE_ERR(err) \ 62 case err: return #err 63 64 /* returns the error name (e.g. "ENOENT") for common errors, "SUCCESS" for 0, 65 * or the decimal value for less common ones. 66 */ 67 const char *errorname(int err) 68 { 69 switch (err) { 70 case 0: return "SUCCESS"; 71 CASE_ERR(EPERM); 72 CASE_ERR(ENOENT); 73 CASE_ERR(ESRCH); 74 CASE_ERR(EINTR); 75 CASE_ERR(EIO); 76 CASE_ERR(ENXIO); 77 CASE_ERR(E2BIG); 78 CASE_ERR(ENOEXEC); 79 CASE_ERR(EBADF); 80 CASE_ERR(ECHILD); 81 CASE_ERR(EAGAIN); 82 CASE_ERR(ENOMEM); 83 CASE_ERR(EACCES); 84 CASE_ERR(EFAULT); 85 CASE_ERR(ENOTBLK); 86 CASE_ERR(EBUSY); 87 CASE_ERR(EEXIST); 88 CASE_ERR(EXDEV); 89 CASE_ERR(ENODEV); 90 CASE_ERR(ENOTDIR); 91 CASE_ERR(EISDIR); 92 CASE_ERR(EINVAL); 93 CASE_ERR(ENFILE); 94 CASE_ERR(EMFILE); 95 CASE_ERR(ENOTTY); 96 CASE_ERR(ETXTBSY); 97 CASE_ERR(EFBIG); 98 CASE_ERR(ENOSPC); 99 CASE_ERR(ESPIPE); 100 CASE_ERR(EROFS); 101 CASE_ERR(EMLINK); 102 CASE_ERR(EPIPE); 103 CASE_ERR(EDOM); 104 CASE_ERR(ERANGE); 105 CASE_ERR(ENOSYS); 106 default: 107 return itoa(err); 108 } 109 } 110 111 static int pad_spc(int llen, int cnt, const char *fmt, ...) 112 { 113 va_list args; 114 int len; 115 int ret; 116 117 for (len = 0; len < cnt - llen; len++) 118 putchar(' '); 119 120 va_start(args, fmt); 121 ret = vfprintf(stdout, fmt, args); 122 va_end(args); 123 return ret < 0 ? ret : ret + len; 124 } 125 126 /* The tests below are intended to be used by the macroes, which evaluate 127 * expression <expr>, print the status to stdout, and update the "ret" 128 * variable to count failures. The functions themselves return the number 129 * of failures, thus either 0 or 1. 130 */ 131 132 #define EXPECT_ZR(cond, expr) \ 133 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_zr(expr, llen); } while (0) 134 135 static int expect_zr(int expr, int llen) 136 { 137 int ret = !(expr == 0); 138 139 llen += printf(" = %d ", expr); 140 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 141 return ret; 142 } 143 144 145 #define EXPECT_NZ(cond, expr, val) \ 146 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_nz(expr, llen; } while (0) 147 148 static int expect_nz(int expr, int llen) 149 { 150 int ret = !(expr != 0); 151 152 llen += printf(" = %d ", expr); 153 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 154 return ret; 155 } 156 157 158 #define EXPECT_EQ(cond, expr, val) \ 159 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_eq(expr, llen, val); } while (0) 160 161 static int expect_eq(uint64_t expr, int llen, uint64_t val) 162 { 163 int ret = !(expr == val); 164 165 llen += printf(" = %lld ", expr); 166 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 167 return ret; 168 } 169 170 171 #define EXPECT_NE(cond, expr, val) \ 172 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_ne(expr, llen, val); } while (0) 173 174 static int expect_ne(int expr, int llen, int val) 175 { 176 int ret = !(expr != val); 177 178 llen += printf(" = %d ", expr); 179 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 180 return ret; 181 } 182 183 184 #define EXPECT_GE(cond, expr, val) \ 185 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_ge(expr, llen, val); } while (0) 186 187 static int expect_ge(int expr, int llen, int val) 188 { 189 int ret = !(expr >= val); 190 191 llen += printf(" = %d ", expr); 192 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 193 return ret; 194 } 195 196 197 #define EXPECT_GT(cond, expr, val) \ 198 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_gt(expr, llen, val); } while (0) 199 200 static int expect_gt(int expr, int llen, int val) 201 { 202 int ret = !(expr > val); 203 204 llen += printf(" = %d ", expr); 205 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 206 return ret; 207 } 208 209 210 #define EXPECT_LE(cond, expr, val) \ 211 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_le(expr, llen, val); } while (0) 212 213 static int expect_le(int expr, int llen, int val) 214 { 215 int ret = !(expr <= val); 216 217 llen += printf(" = %d ", expr); 218 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 219 return ret; 220 } 221 222 223 #define EXPECT_LT(cond, expr, val) \ 224 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_lt(expr, llen, val); } while (0) 225 226 static int expect_lt(int expr, int llen, int val) 227 { 228 int ret = !(expr < val); 229 230 llen += printf(" = %d ", expr); 231 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 232 return ret; 233 } 234 235 236 #define EXPECT_SYSZR(cond, expr) \ 237 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_syszr(expr, llen); } while (0) 238 239 static int expect_syszr(int expr, int llen) 240 { 241 int ret = 0; 242 243 if (expr) { 244 ret = 1; 245 llen += printf(" = %d %s ", expr, errorname(errno)); 246 llen += pad_spc(llen, 64, "[FAIL]\n"); 247 } else { 248 llen += printf(" = %d ", expr); 249 llen += pad_spc(llen, 64, " [OK]\n"); 250 } 251 return ret; 252 } 253 254 255 #define EXPECT_SYSEQ(cond, expr, val) \ 256 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_syseq(expr, llen, val); } while (0) 257 258 static int expect_syseq(int expr, int llen, int val) 259 { 260 int ret = 0; 261 262 if (expr != val) { 263 ret = 1; 264 llen += printf(" = %d %s ", expr, errorname(errno)); 265 llen += pad_spc(llen, 64, "[FAIL]\n"); 266 } else { 267 llen += printf(" = %d ", expr); 268 llen += pad_spc(llen, 64, " [OK]\n"); 269 } 270 return ret; 271 } 272 273 274 #define EXPECT_SYSNE(cond, expr, val) \ 275 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_sysne(expr, llen, val); } while (0) 276 277 static int expect_sysne(int expr, int llen, int val) 278 { 279 int ret = 0; 280 281 if (expr == val) { 282 ret = 1; 283 llen += printf(" = %d %s ", expr, errorname(errno)); 284 llen += pad_spc(llen, 64, "[FAIL]\n"); 285 } else { 286 llen += printf(" = %d ", expr); 287 llen += pad_spc(llen, 64, " [OK]\n"); 288 } 289 return ret; 290 } 291 292 293 #define EXPECT_SYSER(cond, expr, expret, experr) \ 294 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_syserr(expr, expret, experr, llen); } while (0) 295 296 static int expect_syserr(int expr, int expret, int experr, int llen) 297 { 298 int ret = 0; 299 int _errno = errno; 300 301 llen += printf(" = %d %s ", expr, errorname(_errno)); 302 if (expr != expret || _errno != experr) { 303 ret = 1; 304 llen += printf(" != (%d %s) ", expret, errorname(experr)); 305 llen += pad_spc(llen, 64, "[FAIL]\n"); 306 } else { 307 llen += pad_spc(llen, 64, " [OK]\n"); 308 } 309 return ret; 310 } 311 312 313 #define EXPECT_PTRZR(cond, expr) \ 314 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_ptrzr(expr, llen); } while (0) 315 316 static int expect_ptrzr(const void *expr, int llen) 317 { 318 int ret = 0; 319 320 llen += printf(" = <%p> ", expr); 321 if (expr) { 322 ret = 1; 323 llen += pad_spc(llen, 64, "[FAIL]\n"); 324 } else { 325 llen += pad_spc(llen, 64, " [OK]\n"); 326 } 327 return ret; 328 } 329 330 331 #define EXPECT_PTRNZ(cond, expr) \ 332 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_ptrnz(expr, llen); } while (0) 333 334 static int expect_ptrnz(const void *expr, int llen) 335 { 336 int ret = 0; 337 338 llen += printf(" = <%p> ", expr); 339 if (!expr) { 340 ret = 1; 341 llen += pad_spc(llen, 64, "[FAIL]\n"); 342 } else { 343 llen += pad_spc(llen, 64, " [OK]\n"); 344 } 345 return ret; 346 } 347 348 349 #define EXPECT_STRZR(cond, expr) \ 350 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_strzr(expr, llen); } while (0) 351 352 static int expect_strzr(const char *expr, int llen) 353 { 354 int ret = 0; 355 356 llen += printf(" = <%s> ", expr); 357 if (expr) { 358 ret = 1; 359 llen += pad_spc(llen, 64, "[FAIL]\n"); 360 } else { 361 llen += pad_spc(llen, 64, " [OK]\n"); 362 } 363 return ret; 364 } 365 366 367 #define EXPECT_STRNZ(cond, expr) \ 368 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_strnz(expr, llen); } while (0) 369 370 static int expect_strnz(const char *expr, int llen) 371 { 372 int ret = 0; 373 374 llen += printf(" = <%s> ", expr); 375 if (!expr) { 376 ret = 1; 377 llen += pad_spc(llen, 64, "[FAIL]\n"); 378 } else { 379 llen += pad_spc(llen, 64, " [OK]\n"); 380 } 381 return ret; 382 } 383 384 385 #define EXPECT_STREQ(cond, expr, cmp) \ 386 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_streq(expr, llen, cmp); } while (0) 387 388 static int expect_streq(const char *expr, int llen, const char *cmp) 389 { 390 int ret = 0; 391 392 llen += printf(" = <%s> ", expr); 393 if (strcmp(expr, cmp) != 0) { 394 ret = 1; 395 llen += pad_spc(llen, 64, "[FAIL]\n"); 396 } else { 397 llen += pad_spc(llen, 64, " [OK]\n"); 398 } 399 return ret; 400 } 401 402 403 #define EXPECT_STRNE(cond, expr, cmp) \ 404 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_strne(expr, llen, cmp); } while (0) 405 406 static int expect_strne(const char *expr, int llen, const char *cmp) 407 { 408 int ret = 0; 409 410 llen += printf(" = <%s> ", expr); 411 if (strcmp(expr, cmp) == 0) { 412 ret = 1; 413 llen += pad_spc(llen, 64, "[FAIL]\n"); 414 } else { 415 llen += pad_spc(llen, 64, " [OK]\n"); 416 } 417 return ret; 418 } 419 420 421 /* declare tests based on line numbers. There must be exactly one test per line. */ 422 #define CASE_TEST(name) \ 423 case __LINE__: llen += printf("%d %s", test, #name); 424 425 426 /* used by some syscall tests below */ 427 int test_getdents64(const char *dir) 428 { 429 char buffer[4096]; 430 int fd, ret; 431 int err; 432 433 ret = fd = open(dir, O_RDONLY | O_DIRECTORY, 0); 434 if (ret < 0) 435 return ret; 436 437 ret = getdents64(fd, (void *)buffer, sizeof(buffer)); 438 err = errno; 439 close(fd); 440 441 errno = err; 442 return ret; 443 } 444 445 static int test_getpagesize(void) 446 { 447 long x = getpagesize(); 448 int c; 449 450 if (x < 0) 451 return x; 452 453 #if defined(__x86_64__) || defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__) 454 /* 455 * x86 family is always 4K page. 456 */ 457 c = (x == 4096); 458 #elif defined(__aarch64__) 459 /* 460 * Linux aarch64 supports three values of page size: 4K, 16K, and 64K 461 * which are selected at kernel compilation time. 462 */ 463 c = (x == 4096 || x == (16 * 1024) || x == (64 * 1024)); 464 #else 465 /* 466 * Assuming other architectures must have at least 4K page. 467 */ 468 c = (x >= 4096); 469 #endif 470 471 return !c; 472 } 473 474 /* Run syscall tests between IDs <min> and <max>. 475 * Return 0 on success, non-zero on failure. 476 */ 477 int run_syscall(int min, int max) 478 { 479 struct stat stat_buf; 480 int euid0; 481 int proc; 482 int test; 483 int tmp; 484 int ret = 0; 485 void *p1, *p2; 486 487 /* <proc> indicates whether or not /proc is mounted */ 488 proc = stat("/proc", &stat_buf) == 0; 489 490 /* this will be used to skip certain tests that can't be run unprivileged */ 491 euid0 = geteuid() == 0; 492 493 for (test = min; test >= 0 && test <= max; test++) { 494 int llen = 0; // line length 495 496 /* avoid leaving empty lines below, this will insert holes into 497 * test numbers. 498 */ 499 switch (test + __LINE__ + 1) { 500 CASE_TEST(getpid); EXPECT_SYSNE(1, getpid(), -1); break; 501 CASE_TEST(getppid); EXPECT_SYSNE(1, getppid(), -1); break; 502 #ifdef NOLIBC 503 CASE_TEST(gettid); EXPECT_SYSNE(1, gettid(), -1); break; 504 #endif 505 CASE_TEST(getpgid_self); EXPECT_SYSNE(1, getpgid(0), -1); break; 506 CASE_TEST(getpgid_bad); EXPECT_SYSER(1, getpgid(-1), -1, ESRCH); break; 507 CASE_TEST(kill_0); EXPECT_SYSZR(1, kill(getpid(), 0)); break; 508 CASE_TEST(kill_CONT); EXPECT_SYSZR(1, kill(getpid(), 0)); break; 509 CASE_TEST(kill_BADPID); EXPECT_SYSER(1, kill(INT_MAX, 0), -1, ESRCH); break; 510 CASE_TEST(sbrk); if ((p1 = p2 = sbrk(4096)) != (void *)-1) p2 = sbrk(-4096); EXPECT_SYSZR(1, (p2 == (void *)-1) || p2 == p1); break; 511 CASE_TEST(brk); EXPECT_SYSZR(1, brk(sbrk(0))); break; 512 CASE_TEST(chdir_root); EXPECT_SYSZR(1, chdir("/")); break; 513 CASE_TEST(chdir_dot); EXPECT_SYSZR(1, chdir(".")); break; 514 CASE_TEST(chdir_blah); EXPECT_SYSER(1, chdir("/blah"), -1, ENOENT); break; 515 CASE_TEST(chmod_net); EXPECT_SYSZR(proc, chmod("/proc/self/net", 0555)); break; 516 CASE_TEST(chmod_self); EXPECT_SYSER(proc, chmod("/proc/self", 0555), -1, EPERM); break; 517 CASE_TEST(chown_self); EXPECT_SYSER(proc, chown("/proc/self", 0, 0), -1, EPERM); break; 518 CASE_TEST(chroot_root); EXPECT_SYSZR(euid0, chroot("/")); break; 519 CASE_TEST(chroot_blah); EXPECT_SYSER(1, chroot("/proc/self/blah"), -1, ENOENT); break; 520 CASE_TEST(chroot_exe); EXPECT_SYSER(proc, chroot("/proc/self/exe"), -1, ENOTDIR); break; 521 CASE_TEST(close_m1); EXPECT_SYSER(1, close(-1), -1, EBADF); break; 522 CASE_TEST(close_dup); EXPECT_SYSZR(1, close(dup(0))); break; 523 CASE_TEST(dup_0); tmp = dup(0); EXPECT_SYSNE(1, tmp, -1); close(tmp); break; 524 CASE_TEST(dup_m1); tmp = dup(-1); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break; 525 CASE_TEST(dup2_0); tmp = dup2(0, 100); EXPECT_SYSNE(1, tmp, -1); close(tmp); break; 526 CASE_TEST(dup2_m1); tmp = dup2(-1, 100); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break; 527 CASE_TEST(dup3_0); tmp = dup3(0, 100, 0); EXPECT_SYSNE(1, tmp, -1); close(tmp); break; 528 CASE_TEST(dup3_m1); tmp = dup3(-1, 100, 0); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break; 529 CASE_TEST(execve_root); EXPECT_SYSER(1, execve("/", (char*[]){ [0] = "/", [1] = NULL }, NULL), -1, EACCES); break; 530 CASE_TEST(getdents64_root); EXPECT_SYSNE(1, test_getdents64("/"), -1); break; 531 CASE_TEST(getdents64_null); EXPECT_SYSER(1, test_getdents64("/dev/null"), -1, ENOTDIR); break; 532 CASE_TEST(gettimeofday_null); EXPECT_SYSZR(1, gettimeofday(NULL, NULL)); break; 533 #ifdef NOLIBC 534 CASE_TEST(gettimeofday_bad1); EXPECT_SYSER(1, gettimeofday((void *)1, NULL), -1, EFAULT); break; 535 CASE_TEST(gettimeofday_bad2); EXPECT_SYSER(1, gettimeofday(NULL, (void *)1), -1, EFAULT); break; 536 CASE_TEST(gettimeofday_bad2); EXPECT_SYSER(1, gettimeofday(NULL, (void *)1), -1, EFAULT); break; 537 #endif 538 CASE_TEST(getpagesize); EXPECT_SYSZR(1, test_getpagesize()); break; 539 CASE_TEST(ioctl_tiocinq); EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break; 540 CASE_TEST(ioctl_tiocinq); EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break; 541 CASE_TEST(link_root1); EXPECT_SYSER(1, link("/", "/"), -1, EEXIST); break; 542 CASE_TEST(link_blah); EXPECT_SYSER(1, link("/proc/self/blah", "/blah"), -1, ENOENT); break; 543 CASE_TEST(link_dir); EXPECT_SYSER(euid0, link("/", "/blah"), -1, EPERM); break; 544 CASE_TEST(link_cross); EXPECT_SYSER(proc, link("/proc/self/net", "/blah"), -1, EXDEV); break; 545 CASE_TEST(lseek_m1); EXPECT_SYSER(1, lseek(-1, 0, SEEK_SET), -1, EBADF); break; 546 CASE_TEST(lseek_0); EXPECT_SYSER(1, lseek(0, 0, SEEK_SET), -1, ESPIPE); break; 547 CASE_TEST(mkdir_root); EXPECT_SYSER(1, mkdir("/", 0755), -1, EEXIST); break; 548 CASE_TEST(open_tty); EXPECT_SYSNE(1, tmp = open("/dev/null", 0), -1); if (tmp != -1) close(tmp); break; 549 CASE_TEST(open_blah); EXPECT_SYSER(1, tmp = open("/proc/self/blah", 0), -1, ENOENT); if (tmp != -1) close(tmp); break; 550 CASE_TEST(poll_null); EXPECT_SYSZR(1, poll(NULL, 0, 0)); break; 551 CASE_TEST(poll_stdout); EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break; 552 CASE_TEST(poll_fault); EXPECT_SYSER(1, poll((void *)1, 1, 0), -1, EFAULT); break; 553 CASE_TEST(read_badf); EXPECT_SYSER(1, read(-1, &tmp, 1), -1, EBADF); break; 554 CASE_TEST(sched_yield); EXPECT_SYSZR(1, sched_yield()); break; 555 CASE_TEST(select_null); EXPECT_SYSZR(1, ({ struct timeval tv = { 0 }; select(0, NULL, NULL, NULL, &tv); })); break; 556 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; 557 CASE_TEST(select_fault); EXPECT_SYSER(1, select(1, (void *)1, NULL, NULL, 0), -1, EFAULT); break; 558 CASE_TEST(stat_blah); EXPECT_SYSER(1, stat("/proc/self/blah", &stat_buf), -1, ENOENT); break; 559 CASE_TEST(stat_fault); EXPECT_SYSER(1, stat(NULL, &stat_buf), -1, EFAULT); break; 560 CASE_TEST(symlink_root); EXPECT_SYSER(1, symlink("/", "/"), -1, EEXIST); break; 561 CASE_TEST(unlink_root); EXPECT_SYSER(1, unlink("/"), -1, EISDIR); break; 562 CASE_TEST(unlink_blah); EXPECT_SYSER(1, unlink("/proc/self/blah"), -1, ENOENT); break; 563 CASE_TEST(wait_child); EXPECT_SYSER(1, wait(&tmp), -1, ECHILD); break; 564 CASE_TEST(waitpid_min); EXPECT_SYSER(1, waitpid(INT_MIN, &tmp, WNOHANG), -1, ESRCH); break; 565 CASE_TEST(waitpid_child); EXPECT_SYSER(1, waitpid(getpid(), &tmp, WNOHANG), -1, ECHILD); break; 566 CASE_TEST(write_badf); EXPECT_SYSER(1, write(-1, &tmp, 1), -1, EBADF); break; 567 CASE_TEST(write_zero); EXPECT_SYSZR(1, write(1, &tmp, 0)); break; 568 case __LINE__: 569 return ret; /* must be last */ 570 /* note: do not set any defaults so as to permit holes above */ 571 } 572 } 573 return ret; 574 } 575 576 int run_stdlib(int min, int max) 577 { 578 int test; 579 int tmp; 580 int ret = 0; 581 void *p1, *p2; 582 583 for (test = min; test >= 0 && test <= max; test++) { 584 int llen = 0; // line length 585 586 /* avoid leaving empty lines below, this will insert holes into 587 * test numbers. 588 */ 589 switch (test + __LINE__ + 1) { 590 CASE_TEST(getenv_TERM); EXPECT_STRNZ(1, getenv("TERM")); break; 591 CASE_TEST(getenv_blah); EXPECT_STRZR(1, getenv("blah")); break; 592 CASE_TEST(setcmp_blah_blah); EXPECT_EQ(1, strcmp("blah", "blah"), 0); break; 593 CASE_TEST(setcmp_blah_blah2); EXPECT_NE(1, strcmp("blah", "blah2"), 0); break; 594 CASE_TEST(setncmp_blah_blah); EXPECT_EQ(1, strncmp("blah", "blah", 10), 0); break; 595 CASE_TEST(setncmp_blah_blah4); EXPECT_EQ(1, strncmp("blah", "blah4", 4), 0); break; 596 CASE_TEST(setncmp_blah_blah5); EXPECT_NE(1, strncmp("blah", "blah5", 5), 0); break; 597 CASE_TEST(setncmp_blah_blah6); EXPECT_NE(1, strncmp("blah", "blah6", 6), 0); break; 598 CASE_TEST(strchr_foobar_o); EXPECT_STREQ(1, strchr("foobar", 'o'), "oobar"); break; 599 CASE_TEST(strchr_foobar_z); EXPECT_STRZR(1, strchr("foobar", 'z')); break; 600 CASE_TEST(strrchr_foobar_o); EXPECT_STREQ(1, strrchr("foobar", 'o'), "obar"); break; 601 CASE_TEST(strrchr_foobar_z); EXPECT_STRZR(1, strrchr("foobar", 'z')); break; 602 CASE_TEST(memcmp_20_20); EXPECT_EQ(1, memcmp("aaa\x20", "aaa\x20", 4), 0); break; 603 CASE_TEST(memcmp_20_60); EXPECT_LT(1, memcmp("aaa\x20", "aaa\x60", 4), 0); break; 604 CASE_TEST(memcmp_60_20); EXPECT_GT(1, memcmp("aaa\x60", "aaa\x20", 4), 0); break; 605 CASE_TEST(memcmp_20_e0); EXPECT_LT(1, memcmp("aaa\x20", "aaa\xe0", 4), 0); break; 606 CASE_TEST(memcmp_e0_20); EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x20", 4), 0); break; 607 CASE_TEST(memcmp_80_e0); EXPECT_LT(1, memcmp("aaa\x80", "aaa\xe0", 4), 0); break; 608 CASE_TEST(memcmp_e0_80); EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x80", 4), 0); break; 609 CASE_TEST(limit_int8_max); EXPECT_EQ(1, INT8_MAX, (int8_t) 0x7f); break; 610 CASE_TEST(limit_int8_min); EXPECT_EQ(1, INT8_MIN, (int8_t) 0x80); break; 611 CASE_TEST(limit_uint8_max); EXPECT_EQ(1, UINT8_MAX, (uint8_t) 0xff); break; 612 CASE_TEST(limit_int16_max); EXPECT_EQ(1, INT16_MAX, (int16_t) 0x7fff); break; 613 CASE_TEST(limit_int16_min); EXPECT_EQ(1, INT16_MIN, (int16_t) 0x8000); break; 614 CASE_TEST(limit_uint16_max); EXPECT_EQ(1, UINT16_MAX, (uint16_t) 0xffff); break; 615 CASE_TEST(limit_int32_max); EXPECT_EQ(1, INT32_MAX, (int32_t) 0x7fffffff); break; 616 CASE_TEST(limit_int32_min); EXPECT_EQ(1, INT32_MIN, (int32_t) 0x80000000); break; 617 CASE_TEST(limit_uint32_max); EXPECT_EQ(1, UINT32_MAX, (uint32_t) 0xffffffff); break; 618 CASE_TEST(limit_int64_max); EXPECT_EQ(1, INT64_MAX, (int64_t) 0x7fffffffffffffff); break; 619 CASE_TEST(limit_int64_min); EXPECT_EQ(1, INT64_MIN, (int64_t) 0x8000000000000000); break; 620 CASE_TEST(limit_uint64_max); EXPECT_EQ(1, UINT64_MAX, (uint64_t) 0xffffffffffffffff); break; 621 CASE_TEST(limit_int_least8_max); EXPECT_EQ(1, INT_LEAST8_MAX, (int_least8_t) 0x7f); break; 622 CASE_TEST(limit_int_least8_min); EXPECT_EQ(1, INT_LEAST8_MIN, (int_least8_t) 0x80); break; 623 CASE_TEST(limit_uint_least8_max); EXPECT_EQ(1, UINT_LEAST8_MAX, (uint_least8_t) 0xff); break; 624 CASE_TEST(limit_int_least16_max); EXPECT_EQ(1, INT_LEAST16_MAX, (int_least16_t) 0x7fff); break; 625 CASE_TEST(limit_int_least16_min); EXPECT_EQ(1, INT_LEAST16_MIN, (int_least16_t) 0x8000); break; 626 CASE_TEST(limit_uint_least16_max); EXPECT_EQ(1, UINT_LEAST16_MAX, (uint_least16_t) 0xffff); break; 627 CASE_TEST(limit_int_least32_max); EXPECT_EQ(1, INT_LEAST32_MAX, (int_least32_t) 0x7fffffff); break; 628 CASE_TEST(limit_int_least32_min); EXPECT_EQ(1, INT_LEAST32_MIN, (int_least32_t) 0x80000000); break; 629 CASE_TEST(limit_uint_least32_max); EXPECT_EQ(1, UINT_LEAST32_MAX, (uint_least32_t) 0xffffffffU); break; 630 CASE_TEST(limit_int_least64_min); EXPECT_EQ(1, INT_LEAST64_MIN, (int_least64_t) 0x8000000000000000LL); break; 631 CASE_TEST(limit_int_least64_max); EXPECT_EQ(1, INT_LEAST64_MAX, (int_least64_t) 0x7fffffffffffffffLL); break; 632 CASE_TEST(limit_uint_least64_max); EXPECT_EQ(1, UINT_LEAST64_MAX, (uint_least64_t) 0xffffffffffffffffULL); break; 633 CASE_TEST(limit_int_fast8_max); EXPECT_EQ(1, INT_FAST8_MAX, (int_fast8_t) 0x7f); break; 634 CASE_TEST(limit_int_fast8_min); EXPECT_EQ(1, INT_FAST8_MIN, (int_fast8_t) 0x80); break; 635 CASE_TEST(limit_uint_fast8_max); EXPECT_EQ(1, UINT_FAST8_MAX, (uint_fast8_t) 0xff); break; 636 CASE_TEST(limit_int_fast16_min); EXPECT_EQ(1, INT_FAST16_MIN, (int_fast16_t) INTPTR_MIN); break; 637 CASE_TEST(limit_int_fast16_max); EXPECT_EQ(1, INT_FAST16_MAX, (int_fast16_t) INTPTR_MAX); break; 638 CASE_TEST(limit_uint_fast16_max); EXPECT_EQ(1, UINT_FAST16_MAX, (uint_fast16_t) UINTPTR_MAX); break; 639 CASE_TEST(limit_int_fast32_min); EXPECT_EQ(1, INT_FAST32_MIN, (int_fast32_t) INTPTR_MIN); break; 640 CASE_TEST(limit_int_fast32_max); EXPECT_EQ(1, INT_FAST32_MAX, (int_fast32_t) INTPTR_MAX); break; 641 CASE_TEST(limit_uint_fast32_max); EXPECT_EQ(1, UINT_FAST32_MAX, (uint_fast32_t) UINTPTR_MAX); break; 642 CASE_TEST(limit_int_fast64_min); EXPECT_EQ(1, INT_FAST64_MIN, (int_fast64_t) INTPTR_MIN); break; 643 CASE_TEST(limit_int_fast64_max); EXPECT_EQ(1, INT_FAST64_MAX, (int_fast64_t) INTPTR_MAX); break; 644 CASE_TEST(limit_uint_fast64_max); EXPECT_EQ(1, UINT_FAST64_MAX, (uint_fast64_t) UINTPTR_MAX); break; 645 #if __SIZEOF_LONG__ == 8 646 CASE_TEST(limit_intptr_min); EXPECT_EQ(1, INTPTR_MIN, (intptr_t) 0x8000000000000000LL); break; 647 CASE_TEST(limit_intptr_max); EXPECT_EQ(1, INTPTR_MAX, (intptr_t) 0x7fffffffffffffffLL); break; 648 CASE_TEST(limit_uintptr_max); EXPECT_EQ(1, UINTPTR_MAX, (uintptr_t) 0xffffffffffffffffULL); break; 649 CASE_TEST(limit_ptrdiff_min); EXPECT_EQ(1, PTRDIFF_MIN, (ptrdiff_t) 0x8000000000000000LL); break; 650 CASE_TEST(limit_ptrdiff_max); EXPECT_EQ(1, PTRDIFF_MAX, (ptrdiff_t) 0x7fffffffffffffffLL); break; 651 CASE_TEST(limit_size_max); EXPECT_EQ(1, SIZE_MAX, (size_t) 0xffffffffffffffffULL); break; 652 #elif __SIZEOF_LONG__ == 4 653 CASE_TEST(limit_intptr_min); EXPECT_EQ(1, INTPTR_MIN, (intptr_t) 0x80000000); break; 654 CASE_TEST(limit_intptr_max); EXPECT_EQ(1, INTPTR_MAX, (intptr_t) 0x7fffffff); break; 655 CASE_TEST(limit_uintptr_max); EXPECT_EQ(1, UINTPTR_MAX, (uintptr_t) 0xffffffffU); break; 656 CASE_TEST(limit_ptrdiff_min); EXPECT_EQ(1, PTRDIFF_MIN, (ptrdiff_t) 0x80000000); break; 657 CASE_TEST(limit_ptrdiff_max); EXPECT_EQ(1, PTRDIFF_MAX, (ptrdiff_t) 0x7fffffff); break; 658 CASE_TEST(limit_size_max); EXPECT_EQ(1, SIZE_MAX, (size_t) 0xffffffffU); break; 659 #else 660 # warning "__SIZEOF_LONG__ is undefined" 661 #endif /* __SIZEOF_LONG__ */ 662 case __LINE__: 663 return ret; /* must be last */ 664 /* note: do not set any defaults so as to permit holes above */ 665 } 666 } 667 return ret; 668 } 669 670 #if defined(__clang__) 671 __attribute__((optnone)) 672 #elif defined(__GNUC__) 673 __attribute__((optimize("O0"))) 674 #endif 675 static int smash_stack(void) 676 { 677 char buf[100]; 678 679 for (size_t i = 0; i < 200; i++) 680 buf[i] = 'P'; 681 682 return 1; 683 } 684 685 static int run_protection(int min, int max) 686 { 687 pid_t pid; 688 int llen = 0, status; 689 690 llen += printf("0 -fstackprotector "); 691 692 #if !defined(NOLIBC_STACKPROTECTOR) 693 llen += printf("not supported"); 694 pad_spc(llen, 64, "[SKIPPED]\n"); 695 return 0; 696 #endif 697 698 pid = -1; 699 pid = fork(); 700 701 switch (pid) { 702 case -1: 703 llen += printf("fork()"); 704 pad_spc(llen, 64, "[FAIL]\n"); 705 return 1; 706 707 case 0: 708 close(STDOUT_FILENO); 709 close(STDERR_FILENO); 710 711 smash_stack(); 712 return 1; 713 714 default: 715 pid = waitpid(pid, &status, 0); 716 717 if (pid == -1 || !WIFSIGNALED(status) || WTERMSIG(status) != SIGABRT) { 718 llen += printf("waitpid()"); 719 pad_spc(llen, 64, "[FAIL]\n"); 720 return 1; 721 } 722 pad_spc(llen, 64, " [OK]\n"); 723 return 0; 724 } 725 } 726 727 /* prepare what needs to be prepared for pid 1 (stdio, /dev, /proc, etc) */ 728 int prepare(void) 729 { 730 struct stat stat_buf; 731 732 /* It's possible that /dev doesn't even exist or was not mounted, so 733 * we'll try to create it, mount it, or create minimal entries into it. 734 * We want at least /dev/null and /dev/console. 735 */ 736 if (stat("/dev/.", &stat_buf) == 0 || mkdir("/dev", 0755) == 0) { 737 if (stat("/dev/console", &stat_buf) != 0 || 738 stat("/dev/null", &stat_buf) != 0) { 739 /* try devtmpfs first, otherwise fall back to manual creation */ 740 if (mount("/dev", "/dev", "devtmpfs", 0, 0) != 0) { 741 mknod("/dev/console", 0600 | S_IFCHR, makedev(5, 1)); 742 mknod("/dev/null", 0666 | S_IFCHR, makedev(1, 3)); 743 } 744 } 745 } 746 747 /* If no /dev/console was found before calling init, stdio is closed so 748 * we need to reopen it from /dev/console. If it failed above, it will 749 * still fail here and we cannot emit a message anyway. 750 */ 751 if (close(dup(1)) == -1) { 752 int fd = open("/dev/console", O_RDWR); 753 754 if (fd >= 0) { 755 if (fd != 0) 756 dup2(fd, 0); 757 if (fd != 1) 758 dup2(fd, 1); 759 if (fd != 2) 760 dup2(fd, 2); 761 if (fd > 2) 762 close(fd); 763 puts("\nSuccessfully reopened /dev/console."); 764 } 765 } 766 767 /* try to mount /proc if not mounted. Silently fail otherwise */ 768 if (stat("/proc/.", &stat_buf) == 0 || mkdir("/proc", 0755) == 0) { 769 if (stat("/proc/self", &stat_buf) != 0) 770 mount("/proc", "/proc", "proc", 0, 0); 771 } 772 773 return 0; 774 } 775 776 /* This is the definition of known test names, with their functions */ 777 static const struct test test_names[] = { 778 /* add new tests here */ 779 { .name = "syscall", .func = run_syscall }, 780 { .name = "stdlib", .func = run_stdlib }, 781 { .name = "protection", .func = run_protection }, 782 { 0 } 783 }; 784 785 int main(int argc, char **argv, char **envp) 786 { 787 int min = 0; 788 int max = __INT_MAX__; 789 int ret = 0; 790 int err; 791 int idx; 792 char *test; 793 794 environ = envp; 795 796 /* when called as init, it's possible that no console was opened, for 797 * example if no /dev file system was provided. We'll check that fd#1 798 * was opened, and if not we'll attempt to create and open /dev/console 799 * and /dev/null that we'll use for later tests. 800 */ 801 if (getpid() == 1) 802 prepare(); 803 804 /* the definition of a series of tests comes from either argv[1] or the 805 * "NOLIBC_TEST" environment variable. It's made of a comma-delimited 806 * series of test names and optional ranges: 807 * syscall:5-15[:.*],stdlib:8-10 808 */ 809 test = argv[1]; 810 if (!test) 811 test = getenv("NOLIBC_TEST"); 812 813 if (test) { 814 char *comma, *colon, *dash, *value; 815 816 do { 817 comma = strchr(test, ','); 818 if (comma) 819 *(comma++) = '\0'; 820 821 colon = strchr(test, ':'); 822 if (colon) 823 *(colon++) = '\0'; 824 825 for (idx = 0; test_names[idx].name; idx++) { 826 if (strcmp(test, test_names[idx].name) == 0) 827 break; 828 } 829 830 if (test_names[idx].name) { 831 /* The test was named, it will be called at least 832 * once. We may have an optional range at <colon> 833 * here, which defaults to the full range. 834 */ 835 do { 836 min = 0; max = __INT_MAX__; 837 value = colon; 838 if (value && *value) { 839 colon = strchr(value, ':'); 840 if (colon) 841 *(colon++) = '\0'; 842 843 dash = strchr(value, '-'); 844 if (dash) 845 *(dash++) = '\0'; 846 847 /* support :val: :min-max: :min-: :-max: */ 848 if (*value) 849 min = atoi(value); 850 if (!dash) 851 max = min; 852 else if (*dash) 853 max = atoi(dash); 854 855 value = colon; 856 } 857 858 /* now's time to call the test */ 859 printf("Running test '%s'\n", test_names[idx].name); 860 err = test_names[idx].func(min, max); 861 ret += err; 862 printf("Errors during this test: %d\n\n", err); 863 } while (colon && *colon); 864 } else 865 printf("Ignoring unknown test name '%s'\n", test); 866 867 test = comma; 868 } while (test && *test); 869 } else { 870 /* no test mentioned, run everything */ 871 for (idx = 0; test_names[idx].name; idx++) { 872 printf("Running test '%s'\n", test_names[idx].name); 873 err = test_names[idx].func(min, max); 874 ret += err; 875 printf("Errors during this test: %d\n\n", err); 876 } 877 } 878 879 printf("Total number of errors: %d\n", ret); 880 881 if (getpid() == 1) { 882 /* we're running as init, there's no other process on the 883 * system, thus likely started from a VM for a quick check. 884 * Exiting will provoke a kernel panic that may be reported 885 * as an error by Qemu or the hypervisor, while stopping 886 * cleanly will often be reported as a success. This allows 887 * to use the output of this program for bisecting kernels. 888 */ 889 printf("Leaving init with final status: %d\n", !!ret); 890 if (ret == 0) 891 reboot(LINUX_REBOOT_CMD_POWER_OFF); 892 #if defined(__x86_64__) 893 /* QEMU started with "-device isa-debug-exit -no-reboot" will 894 * exit with status code 2N+1 when N is written to 0x501. We 895 * hard-code the syscall here as it's arch-dependent. 896 */ 897 #if defined(_NOLIBC_SYS_H) 898 else if (my_syscall3(__NR_ioperm, 0x501, 1, 1) == 0) 899 #else 900 else if (ioperm(0x501, 1, 1) == 0) 901 #endif 902 asm volatile ("outb %%al, %%dx" :: "d"(0x501), "a"(0)); 903 /* if it does nothing, fall back to the regular panic */ 904 #endif 905 } 906 907 printf("Exiting with status %d\n", !!ret); 908 return !!ret; 909 } 910