tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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() */
42char **environ;
43
44/* definition of a series of tests */
45struct test {
46 const char *name; // test name
47 int (*func)(int min, int max); // handler
48};
49
50#ifndef _NOLIBC_STDLIB_H
51char *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 */
67const 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
111static 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
135static 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
148static 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
161static 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
174static 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
187static 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
200static 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
213static 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
226static 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
239static 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
258static 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
277static 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
296static 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
316static 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
334static 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
352static 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
370static 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
388static 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
406static 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 */
427int 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
445static 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 */
477int 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
576int 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
675static 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
685static 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) */
728int 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 */
777static 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
785int 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}