1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Test cases for printf facility. 4 */ 5 6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 7 8 #include <linux/init.h> 9 #include <linux/kernel.h> 10 #include <linux/module.h> 11 #include <linux/printk.h> 12 #include <linux/random.h> 13 #include <linux/rtc.h> 14 #include <linux/slab.h> 15 #include <linux/string.h> 16 17 #include <linux/bitmap.h> 18 #include <linux/dcache.h> 19 #include <linux/socket.h> 20 #include <linux/in.h> 21 22 #include <linux/gfp.h> 23 #include <linux/mm.h> 24 25 #include <linux/property.h> 26 27 #include "../tools/testing/selftests/kselftest_module.h" 28 29 #define BUF_SIZE 256 30 #define PAD_SIZE 16 31 #define FILL_CHAR '$' 32 33 static unsigned total_tests __initdata; 34 static unsigned failed_tests __initdata; 35 static char *test_buffer __initdata; 36 static char *alloced_buffer __initdata; 37 38 static int __printf(4, 0) __init 39 do_test(int bufsize, const char *expect, int elen, 40 const char *fmt, va_list ap) 41 { 42 va_list aq; 43 int ret, written; 44 45 total_tests++; 46 47 memset(alloced_buffer, FILL_CHAR, BUF_SIZE + 2*PAD_SIZE); 48 va_copy(aq, ap); 49 ret = vsnprintf(test_buffer, bufsize, fmt, aq); 50 va_end(aq); 51 52 if (ret != elen) { 53 pr_warn("vsnprintf(buf, %d, \"%s\", ...) returned %d, expected %d\n", 54 bufsize, fmt, ret, elen); 55 return 1; 56 } 57 58 if (memchr_inv(alloced_buffer, FILL_CHAR, PAD_SIZE)) { 59 pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote before buffer\n", bufsize, fmt); 60 return 1; 61 } 62 63 if (!bufsize) { 64 if (memchr_inv(test_buffer, FILL_CHAR, BUF_SIZE + PAD_SIZE)) { 65 pr_warn("vsnprintf(buf, 0, \"%s\", ...) wrote to buffer\n", 66 fmt); 67 return 1; 68 } 69 return 0; 70 } 71 72 written = min(bufsize-1, elen); 73 if (test_buffer[written]) { 74 pr_warn("vsnprintf(buf, %d, \"%s\", ...) did not nul-terminate buffer\n", 75 bufsize, fmt); 76 return 1; 77 } 78 79 if (memchr_inv(test_buffer + written + 1, FILL_CHAR, BUF_SIZE + PAD_SIZE - (written + 1))) { 80 pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote beyond the nul-terminator\n", 81 bufsize, fmt); 82 return 1; 83 } 84 85 if (memcmp(test_buffer, expect, written)) { 86 pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote '%s', expected '%.*s'\n", 87 bufsize, fmt, test_buffer, written, expect); 88 return 1; 89 } 90 return 0; 91 } 92 93 static void __printf(3, 4) __init 94 __test(const char *expect, int elen, const char *fmt, ...) 95 { 96 va_list ap; 97 int rand; 98 char *p; 99 100 if (elen >= BUF_SIZE) { 101 pr_err("error in test suite: expected output length %d too long. Format was '%s'.\n", 102 elen, fmt); 103 failed_tests++; 104 return; 105 } 106 107 va_start(ap, fmt); 108 109 /* 110 * Every fmt+args is subjected to four tests: Three where we 111 * tell vsnprintf varying buffer sizes (plenty, not quite 112 * enough and 0), and then we also test that kvasprintf would 113 * be able to print it as expected. 114 */ 115 failed_tests += do_test(BUF_SIZE, expect, elen, fmt, ap); 116 rand = 1 + prandom_u32_max(elen+1); 117 /* Since elen < BUF_SIZE, we have 1 <= rand <= BUF_SIZE. */ 118 failed_tests += do_test(rand, expect, elen, fmt, ap); 119 failed_tests += do_test(0, expect, elen, fmt, ap); 120 121 p = kvasprintf(GFP_KERNEL, fmt, ap); 122 if (p) { 123 total_tests++; 124 if (memcmp(p, expect, elen+1)) { 125 pr_warn("kvasprintf(..., \"%s\", ...) returned '%s', expected '%s'\n", 126 fmt, p, expect); 127 failed_tests++; 128 } 129 kfree(p); 130 } 131 va_end(ap); 132 } 133 134 #define test(expect, fmt, ...) \ 135 __test(expect, strlen(expect), fmt, ##__VA_ARGS__) 136 137 static void __init 138 test_basic(void) 139 { 140 /* Work around annoying "warning: zero-length gnu_printf format string". */ 141 char nul = '\0'; 142 143 test("", &nul); 144 test("100%", "100%%"); 145 test("xxx%yyy", "xxx%cyyy", '%'); 146 __test("xxx\0yyy", 7, "xxx%cyyy", '\0'); 147 } 148 149 static void __init 150 test_number(void) 151 { 152 test("0x1234abcd ", "%#-12x", 0x1234abcd); 153 test(" 0x1234abcd", "%#12x", 0x1234abcd); 154 test("0|001| 12|+123| 1234|-123|-1234", "%d|%03d|%3d|%+d|% d|%+d|% d", 0, 1, 12, 123, 1234, -123, -1234); 155 test("0|1|1|128|255", "%hhu|%hhu|%hhu|%hhu|%hhu", 0, 1, 257, 128, -1); 156 test("0|1|1|-128|-1", "%hhd|%hhd|%hhd|%hhd|%hhd", 0, 1, 257, 128, -1); 157 test("2015122420151225", "%ho%ho%#ho", 1037, 5282, -11627); 158 /* 159 * POSIX/C99: »The result of converting zero with an explicit 160 * precision of zero shall be no characters.« Hence the output 161 * from the below test should really be "00|0||| ". However, 162 * the kernel's printf also produces a single 0 in that 163 * case. This test case simply documents the current 164 * behaviour. 165 */ 166 test("00|0|0|0|0", "%.2d|%.1d|%.0d|%.*d|%1.0d", 0, 0, 0, 0, 0, 0); 167 #ifndef __CHAR_UNSIGNED__ 168 { 169 /* 170 * Passing a 'char' to a %02x specifier doesn't do 171 * what was presumably the intention when char is 172 * signed and the value is negative. One must either & 173 * with 0xff or cast to u8. 174 */ 175 char val = -16; 176 test("0xfffffff0|0xf0|0xf0", "%#02x|%#02x|%#02x", val, val & 0xff, (u8)val); 177 } 178 #endif 179 } 180 181 static void __init 182 test_string(void) 183 { 184 test("", "%s%.0s", "", "123"); 185 test("ABCD|abc|123", "%s|%.3s|%.*s", "ABCD", "abcdef", 3, "123456"); 186 test("1 | 2|3 | 4|5 ", "%-3s|%3s|%-*s|%*s|%*s", "1", "2", 3, "3", 3, "4", -3, "5"); 187 test("1234 ", "%-10.4s", "123456"); 188 test(" 1234", "%10.4s", "123456"); 189 /* 190 * POSIX and C99 say that a negative precision (which is only 191 * possible to pass via a * argument) should be treated as if 192 * the precision wasn't present, and that if the precision is 193 * omitted (as in %.s), the precision should be taken to be 194 * 0. However, the kernel's printf behave exactly opposite, 195 * treating a negative precision as 0 and treating an omitted 196 * precision specifier as if no precision was given. 197 * 198 * These test cases document the current behaviour; should 199 * anyone ever feel the need to follow the standards more 200 * closely, this can be revisited. 201 */ 202 test(" ", "%4.*s", -5, "123456"); 203 test("123456", "%.s", "123456"); 204 test("a||", "%.s|%.0s|%.*s", "a", "b", 0, "c"); 205 test("a | | ", "%-3.s|%-3.0s|%-3.*s", "a", "b", 0, "c"); 206 } 207 208 #define PLAIN_BUF_SIZE 64 /* leave some space so we don't oops */ 209 210 #if BITS_PER_LONG == 64 211 212 #define PTR_WIDTH 16 213 #define PTR ((void *)0xffff0123456789abUL) 214 #define PTR_STR "ffff0123456789ab" 215 #define PTR_VAL_NO_CRNG "(____ptrval____)" 216 #define ZEROS "00000000" /* hex 32 zero bits */ 217 #define ONES "ffffffff" /* hex 32 one bits */ 218 219 static int __init 220 plain_format(void) 221 { 222 char buf[PLAIN_BUF_SIZE]; 223 int nchars; 224 225 nchars = snprintf(buf, PLAIN_BUF_SIZE, "%p", PTR); 226 227 if (nchars != PTR_WIDTH) 228 return -1; 229 230 if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) { 231 pr_warn("crng possibly not yet initialized. plain 'p' buffer contains \"%s\"", 232 PTR_VAL_NO_CRNG); 233 return 0; 234 } 235 236 if (strncmp(buf, ZEROS, strlen(ZEROS)) != 0) 237 return -1; 238 239 return 0; 240 } 241 242 #else 243 244 #define PTR_WIDTH 8 245 #define PTR ((void *)0x456789ab) 246 #define PTR_STR "456789ab" 247 #define PTR_VAL_NO_CRNG "(ptrval)" 248 #define ZEROS "" 249 #define ONES "" 250 251 static int __init 252 plain_format(void) 253 { 254 /* Format is implicitly tested for 32 bit machines by plain_hash() */ 255 return 0; 256 } 257 258 #endif /* BITS_PER_LONG == 64 */ 259 260 static int __init 261 plain_hash_to_buffer(const void *p, char *buf, size_t len) 262 { 263 int nchars; 264 265 nchars = snprintf(buf, len, "%p", p); 266 267 if (nchars != PTR_WIDTH) 268 return -1; 269 270 if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) { 271 pr_warn("crng possibly not yet initialized. plain 'p' buffer contains \"%s\"", 272 PTR_VAL_NO_CRNG); 273 return 0; 274 } 275 276 return 0; 277 } 278 279 static int __init 280 plain_hash(void) 281 { 282 char buf[PLAIN_BUF_SIZE]; 283 int ret; 284 285 ret = plain_hash_to_buffer(PTR, buf, PLAIN_BUF_SIZE); 286 if (ret) 287 return ret; 288 289 if (strncmp(buf, PTR_STR, PTR_WIDTH) == 0) 290 return -1; 291 292 return 0; 293 } 294 295 /* 296 * We can't use test() to test %p because we don't know what output to expect 297 * after an address is hashed. 298 */ 299 static void __init 300 plain(void) 301 { 302 int err; 303 304 err = plain_hash(); 305 if (err) { 306 pr_warn("plain 'p' does not appear to be hashed\n"); 307 failed_tests++; 308 return; 309 } 310 311 err = plain_format(); 312 if (err) { 313 pr_warn("hashing plain 'p' has unexpected format\n"); 314 failed_tests++; 315 } 316 } 317 318 static void __init 319 test_hashed(const char *fmt, const void *p) 320 { 321 char buf[PLAIN_BUF_SIZE]; 322 int ret; 323 324 /* 325 * No need to increase failed test counter since this is assumed 326 * to be called after plain(). 327 */ 328 ret = plain_hash_to_buffer(p, buf, PLAIN_BUF_SIZE); 329 if (ret) 330 return; 331 332 test(buf, fmt, p); 333 } 334 335 /* 336 * NULL pointers aren't hashed. 337 */ 338 static void __init 339 null_pointer(void) 340 { 341 test(ZEROS "00000000", "%p", NULL); 342 test(ZEROS "00000000", "%px", NULL); 343 test("(null)", "%pE", NULL); 344 } 345 346 /* 347 * Error pointers aren't hashed. 348 */ 349 static void __init 350 error_pointer(void) 351 { 352 test(ONES "fffffff5", "%p", ERR_PTR(-11)); 353 test(ONES "fffffff5", "%px", ERR_PTR(-11)); 354 test("(efault)", "%pE", ERR_PTR(-11)); 355 } 356 357 #define PTR_INVALID ((void *)0x000000ab) 358 359 static void __init 360 invalid_pointer(void) 361 { 362 test_hashed("%p", PTR_INVALID); 363 test(ZEROS "000000ab", "%px", PTR_INVALID); 364 test("(efault)", "%pE", PTR_INVALID); 365 } 366 367 static void __init 368 symbol_ptr(void) 369 { 370 } 371 372 static void __init 373 kernel_ptr(void) 374 { 375 /* We can't test this without access to kptr_restrict. */ 376 } 377 378 static void __init 379 struct_resource(void) 380 { 381 } 382 383 static void __init 384 addr(void) 385 { 386 } 387 388 static void __init 389 escaped_str(void) 390 { 391 } 392 393 static void __init 394 hex_string(void) 395 { 396 const char buf[3] = {0xc0, 0xff, 0xee}; 397 398 test("c0 ff ee|c0:ff:ee|c0-ff-ee|c0ffee", 399 "%3ph|%3phC|%3phD|%3phN", buf, buf, buf, buf); 400 test("c0 ff ee|c0:ff:ee|c0-ff-ee|c0ffee", 401 "%*ph|%*phC|%*phD|%*phN", 3, buf, 3, buf, 3, buf, 3, buf); 402 } 403 404 static void __init 405 mac(void) 406 { 407 const u8 addr[6] = {0x2d, 0x48, 0xd6, 0xfc, 0x7a, 0x05}; 408 409 test("2d:48:d6:fc:7a:05", "%pM", addr); 410 test("05:7a:fc:d6:48:2d", "%pMR", addr); 411 test("2d-48-d6-fc-7a-05", "%pMF", addr); 412 test("2d48d6fc7a05", "%pm", addr); 413 test("057afcd6482d", "%pmR", addr); 414 } 415 416 static void __init 417 ip4(void) 418 { 419 struct sockaddr_in sa; 420 421 sa.sin_family = AF_INET; 422 sa.sin_port = cpu_to_be16(12345); 423 sa.sin_addr.s_addr = cpu_to_be32(0x7f000001); 424 425 test("127.000.000.001|127.0.0.1", "%pi4|%pI4", &sa.sin_addr, &sa.sin_addr); 426 test("127.000.000.001|127.0.0.1", "%piS|%pIS", &sa, &sa); 427 sa.sin_addr.s_addr = cpu_to_be32(0x01020304); 428 test("001.002.003.004:12345|1.2.3.4:12345", "%piSp|%pISp", &sa, &sa); 429 } 430 431 static void __init 432 ip6(void) 433 { 434 } 435 436 static void __init 437 ip(void) 438 { 439 ip4(); 440 ip6(); 441 } 442 443 static void __init 444 uuid(void) 445 { 446 const char uuid[16] = {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 447 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf}; 448 449 test("00010203-0405-0607-0809-0a0b0c0d0e0f", "%pUb", uuid); 450 test("00010203-0405-0607-0809-0A0B0C0D0E0F", "%pUB", uuid); 451 test("03020100-0504-0706-0809-0a0b0c0d0e0f", "%pUl", uuid); 452 test("03020100-0504-0706-0809-0A0B0C0D0E0F", "%pUL", uuid); 453 } 454 455 static struct dentry test_dentry[4] __initdata = { 456 { .d_parent = &test_dentry[0], 457 .d_name = QSTR_INIT(test_dentry[0].d_iname, 3), 458 .d_iname = "foo" }, 459 { .d_parent = &test_dentry[0], 460 .d_name = QSTR_INIT(test_dentry[1].d_iname, 5), 461 .d_iname = "bravo" }, 462 { .d_parent = &test_dentry[1], 463 .d_name = QSTR_INIT(test_dentry[2].d_iname, 4), 464 .d_iname = "alfa" }, 465 { .d_parent = &test_dentry[2], 466 .d_name = QSTR_INIT(test_dentry[3].d_iname, 5), 467 .d_iname = "romeo" }, 468 }; 469 470 static void __init 471 dentry(void) 472 { 473 test("foo", "%pd", &test_dentry[0]); 474 test("foo", "%pd2", &test_dentry[0]); 475 476 test("(null)", "%pd", NULL); 477 test("(efault)", "%pd", PTR_INVALID); 478 test("(null)", "%pD", NULL); 479 test("(efault)", "%pD", PTR_INVALID); 480 481 test("romeo", "%pd", &test_dentry[3]); 482 test("alfa/romeo", "%pd2", &test_dentry[3]); 483 test("bravo/alfa/romeo", "%pd3", &test_dentry[3]); 484 test("/bravo/alfa/romeo", "%pd4", &test_dentry[3]); 485 test("/bravo/alfa", "%pd4", &test_dentry[2]); 486 487 test("bravo/alfa |bravo/alfa ", "%-12pd2|%*pd2", &test_dentry[2], -12, &test_dentry[2]); 488 test(" bravo/alfa| bravo/alfa", "%12pd2|%*pd2", &test_dentry[2], 12, &test_dentry[2]); 489 } 490 491 static void __init 492 struct_va_format(void) 493 { 494 } 495 496 static void __init 497 time_and_date(void) 498 { 499 /* 1543210543 */ 500 const struct rtc_time tm = { 501 .tm_sec = 43, 502 .tm_min = 35, 503 .tm_hour = 5, 504 .tm_mday = 26, 505 .tm_mon = 10, 506 .tm_year = 118, 507 }; 508 /* 2019-01-04T15:32:23 */ 509 time64_t t = 1546615943; 510 511 test("(%pt?)", "%pt", &tm); 512 test("2018-11-26T05:35:43", "%ptR", &tm); 513 test("0118-10-26T05:35:43", "%ptRr", &tm); 514 test("05:35:43|2018-11-26", "%ptRt|%ptRd", &tm, &tm); 515 test("05:35:43|0118-10-26", "%ptRtr|%ptRdr", &tm, &tm); 516 test("05:35:43|2018-11-26", "%ptRttr|%ptRdtr", &tm, &tm); 517 test("05:35:43 tr|2018-11-26 tr", "%ptRt tr|%ptRd tr", &tm, &tm); 518 519 test("2019-01-04T15:32:23", "%ptT", &t); 520 test("0119-00-04T15:32:23", "%ptTr", &t); 521 test("15:32:23|2019-01-04", "%ptTt|%ptTd", &t, &t); 522 test("15:32:23|0119-00-04", "%ptTtr|%ptTdr", &t, &t); 523 } 524 525 static void __init 526 struct_clk(void) 527 { 528 } 529 530 static void __init 531 large_bitmap(void) 532 { 533 const int nbits = 1 << 16; 534 unsigned long *bits = bitmap_zalloc(nbits, GFP_KERNEL); 535 if (!bits) 536 return; 537 538 bitmap_set(bits, 1, 20); 539 bitmap_set(bits, 60000, 15); 540 test("1-20,60000-60014", "%*pbl", nbits, bits); 541 bitmap_free(bits); 542 } 543 544 static void __init 545 bitmap(void) 546 { 547 DECLARE_BITMAP(bits, 20); 548 const int primes[] = {2,3,5,7,11,13,17,19}; 549 int i; 550 551 bitmap_zero(bits, 20); 552 test("00000|00000", "%20pb|%*pb", bits, 20, bits); 553 test("|", "%20pbl|%*pbl", bits, 20, bits); 554 555 for (i = 0; i < ARRAY_SIZE(primes); ++i) 556 set_bit(primes[i], bits); 557 test("a28ac|a28ac", "%20pb|%*pb", bits, 20, bits); 558 test("2-3,5,7,11,13,17,19|2-3,5,7,11,13,17,19", "%20pbl|%*pbl", bits, 20, bits); 559 560 bitmap_fill(bits, 20); 561 test("fffff|fffff", "%20pb|%*pb", bits, 20, bits); 562 test("0-19|0-19", "%20pbl|%*pbl", bits, 20, bits); 563 564 large_bitmap(); 565 } 566 567 static void __init 568 netdev_features(void) 569 { 570 } 571 572 static void __init 573 flags(void) 574 { 575 unsigned long flags; 576 gfp_t gfp; 577 char *cmp_buffer; 578 579 flags = 0; 580 test("", "%pGp", &flags); 581 582 /* Page flags should filter the zone id */ 583 flags = 1UL << NR_PAGEFLAGS; 584 test("", "%pGp", &flags); 585 586 flags |= 1UL << PG_uptodate | 1UL << PG_dirty | 1UL << PG_lru 587 | 1UL << PG_active | 1UL << PG_swapbacked; 588 test("uptodate|dirty|lru|active|swapbacked", "%pGp", &flags); 589 590 591 flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC 592 | VM_DENYWRITE; 593 test("read|exec|mayread|maywrite|mayexec|denywrite", "%pGv", &flags); 594 595 gfp = GFP_TRANSHUGE; 596 test("GFP_TRANSHUGE", "%pGg", &gfp); 597 598 gfp = GFP_ATOMIC|__GFP_DMA; 599 test("GFP_ATOMIC|GFP_DMA", "%pGg", &gfp); 600 601 gfp = __GFP_ATOMIC; 602 test("__GFP_ATOMIC", "%pGg", &gfp); 603 604 cmp_buffer = kmalloc(BUF_SIZE, GFP_KERNEL); 605 if (!cmp_buffer) 606 return; 607 608 /* Any flags not translated by the table should remain numeric */ 609 gfp = ~__GFP_BITS_MASK; 610 snprintf(cmp_buffer, BUF_SIZE, "%#lx", (unsigned long) gfp); 611 test(cmp_buffer, "%pGg", &gfp); 612 613 snprintf(cmp_buffer, BUF_SIZE, "__GFP_ATOMIC|%#lx", 614 (unsigned long) gfp); 615 gfp |= __GFP_ATOMIC; 616 test(cmp_buffer, "%pGg", &gfp); 617 618 kfree(cmp_buffer); 619 } 620 621 static void __init fwnode_pointer(void) 622 { 623 const struct software_node softnodes[] = { 624 { .name = "first", }, 625 { .name = "second", .parent = &softnodes[0], }, 626 { .name = "third", .parent = &softnodes[1], }, 627 { NULL /* Guardian */ } 628 }; 629 const char * const full_name = "first/second/third"; 630 const char * const full_name_second = "first/second"; 631 const char * const second_name = "second"; 632 const char * const third_name = "third"; 633 int rval; 634 635 rval = software_node_register_nodes(softnodes); 636 if (rval) { 637 pr_warn("cannot register softnodes; rval %d\n", rval); 638 return; 639 } 640 641 test(full_name_second, "%pfw", software_node_fwnode(&softnodes[1])); 642 test(full_name, "%pfw", software_node_fwnode(&softnodes[2])); 643 test(full_name, "%pfwf", software_node_fwnode(&softnodes[2])); 644 test(second_name, "%pfwP", software_node_fwnode(&softnodes[1])); 645 test(third_name, "%pfwP", software_node_fwnode(&softnodes[2])); 646 647 software_node_unregister(&softnodes[2]); 648 software_node_unregister(&softnodes[1]); 649 software_node_unregister(&softnodes[0]); 650 } 651 652 static void __init 653 errptr(void) 654 { 655 test("-1234", "%pe", ERR_PTR(-1234)); 656 657 /* Check that %pe with a non-ERR_PTR gets treated as ordinary %p. */ 658 BUILD_BUG_ON(IS_ERR(PTR)); 659 test_hashed("%pe", PTR); 660 661 #ifdef CONFIG_SYMBOLIC_ERRNAME 662 test("(-ENOTSOCK)", "(%pe)", ERR_PTR(-ENOTSOCK)); 663 test("(-EAGAIN)", "(%pe)", ERR_PTR(-EAGAIN)); 664 BUILD_BUG_ON(EAGAIN != EWOULDBLOCK); 665 test("(-EAGAIN)", "(%pe)", ERR_PTR(-EWOULDBLOCK)); 666 test("[-EIO ]", "[%-8pe]", ERR_PTR(-EIO)); 667 test("[ -EIO]", "[%8pe]", ERR_PTR(-EIO)); 668 test("-EPROBE_DEFER", "%pe", ERR_PTR(-EPROBE_DEFER)); 669 #endif 670 } 671 672 static void __init 673 test_pointer(void) 674 { 675 plain(); 676 null_pointer(); 677 error_pointer(); 678 invalid_pointer(); 679 symbol_ptr(); 680 kernel_ptr(); 681 struct_resource(); 682 addr(); 683 escaped_str(); 684 hex_string(); 685 mac(); 686 ip(); 687 uuid(); 688 dentry(); 689 struct_va_format(); 690 time_and_date(); 691 struct_clk(); 692 bitmap(); 693 netdev_features(); 694 flags(); 695 errptr(); 696 fwnode_pointer(); 697 } 698 699 static void __init selftest(void) 700 { 701 alloced_buffer = kmalloc(BUF_SIZE + 2*PAD_SIZE, GFP_KERNEL); 702 if (!alloced_buffer) 703 return; 704 test_buffer = alloced_buffer + PAD_SIZE; 705 706 test_basic(); 707 test_number(); 708 test_string(); 709 test_pointer(); 710 711 kfree(alloced_buffer); 712 } 713 714 KSTM_MODULE_LOADERS(test_printf); 715 MODULE_AUTHOR("Rasmus Villemoes <linux@rasmusvillemoes.dk>"); 716 MODULE_LICENSE("GPL"); 717