1 // SPDX-License-Identifier: GPL-2.0 2 #include <test_progs.h> 3 #include "kprobe_multi.skel.h" 4 #include "trace_helpers.h" 5 #include "kprobe_multi_empty.skel.h" 6 #include "kprobe_multi_override.skel.h" 7 #include "kprobe_multi_session.skel.h" 8 #include "kprobe_multi_session_cookie.skel.h" 9 #include "kprobe_multi_verifier.skel.h" 10 #include "bpf/libbpf_internal.h" 11 #include "bpf/hashmap.h" 12 13 static void kprobe_multi_test_run(struct kprobe_multi *skel, bool test_return) 14 { 15 LIBBPF_OPTS(bpf_test_run_opts, topts); 16 int err, prog_fd; 17 18 prog_fd = bpf_program__fd(skel->progs.trigger); 19 err = bpf_prog_test_run_opts(prog_fd, &topts); 20 ASSERT_OK(err, "test_run"); 21 ASSERT_EQ(topts.retval, 0, "test_run"); 22 23 ASSERT_EQ(skel->bss->kprobe_test1_result, 1, "kprobe_test1_result"); 24 ASSERT_EQ(skel->bss->kprobe_test2_result, 1, "kprobe_test2_result"); 25 ASSERT_EQ(skel->bss->kprobe_test3_result, 1, "kprobe_test3_result"); 26 ASSERT_EQ(skel->bss->kprobe_test4_result, 1, "kprobe_test4_result"); 27 ASSERT_EQ(skel->bss->kprobe_test5_result, 1, "kprobe_test5_result"); 28 ASSERT_EQ(skel->bss->kprobe_test6_result, 1, "kprobe_test6_result"); 29 ASSERT_EQ(skel->bss->kprobe_test7_result, 1, "kprobe_test7_result"); 30 ASSERT_EQ(skel->bss->kprobe_test8_result, 1, "kprobe_test8_result"); 31 32 if (test_return) { 33 ASSERT_EQ(skel->bss->kretprobe_test1_result, 1, "kretprobe_test1_result"); 34 ASSERT_EQ(skel->bss->kretprobe_test2_result, 1, "kretprobe_test2_result"); 35 ASSERT_EQ(skel->bss->kretprobe_test3_result, 1, "kretprobe_test3_result"); 36 ASSERT_EQ(skel->bss->kretprobe_test4_result, 1, "kretprobe_test4_result"); 37 ASSERT_EQ(skel->bss->kretprobe_test5_result, 1, "kretprobe_test5_result"); 38 ASSERT_EQ(skel->bss->kretprobe_test6_result, 1, "kretprobe_test6_result"); 39 ASSERT_EQ(skel->bss->kretprobe_test7_result, 1, "kretprobe_test7_result"); 40 ASSERT_EQ(skel->bss->kretprobe_test8_result, 1, "kretprobe_test8_result"); 41 } 42 } 43 44 static void test_skel_api(void) 45 { 46 struct kprobe_multi *skel = NULL; 47 int err; 48 49 skel = kprobe_multi__open_and_load(); 50 if (!ASSERT_OK_PTR(skel, "kprobe_multi__open_and_load")) 51 goto cleanup; 52 53 skel->bss->pid = getpid(); 54 err = kprobe_multi__attach(skel); 55 if (!ASSERT_OK(err, "kprobe_multi__attach")) 56 goto cleanup; 57 58 kprobe_multi_test_run(skel, true); 59 60 cleanup: 61 kprobe_multi__destroy(skel); 62 } 63 64 static void test_link_api(struct bpf_link_create_opts *opts) 65 { 66 int prog_fd, link1_fd = -1, link2_fd = -1; 67 struct kprobe_multi *skel = NULL; 68 69 skel = kprobe_multi__open_and_load(); 70 if (!ASSERT_OK_PTR(skel, "fentry_raw_skel_load")) 71 goto cleanup; 72 73 skel->bss->pid = getpid(); 74 prog_fd = bpf_program__fd(skel->progs.test_kprobe); 75 link1_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_KPROBE_MULTI, opts); 76 if (!ASSERT_GE(link1_fd, 0, "link_fd")) 77 goto cleanup; 78 79 opts->kprobe_multi.flags = BPF_F_KPROBE_MULTI_RETURN; 80 prog_fd = bpf_program__fd(skel->progs.test_kretprobe); 81 link2_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_KPROBE_MULTI, opts); 82 if (!ASSERT_GE(link2_fd, 0, "link_fd")) 83 goto cleanup; 84 85 kprobe_multi_test_run(skel, true); 86 87 cleanup: 88 if (link1_fd != -1) 89 close(link1_fd); 90 if (link2_fd != -1) 91 close(link2_fd); 92 kprobe_multi__destroy(skel); 93 } 94 95 #define GET_ADDR(__sym, __addr) ({ \ 96 __addr = ksym_get_addr(__sym); \ 97 if (!ASSERT_NEQ(__addr, 0, "kallsyms load failed for " #__sym)) \ 98 return; \ 99 }) 100 101 static void test_link_api_addrs(void) 102 { 103 LIBBPF_OPTS(bpf_link_create_opts, opts); 104 unsigned long long addrs[8]; 105 106 GET_ADDR("bpf_fentry_test1", addrs[0]); 107 GET_ADDR("bpf_fentry_test2", addrs[1]); 108 GET_ADDR("bpf_fentry_test3", addrs[2]); 109 GET_ADDR("bpf_fentry_test4", addrs[3]); 110 GET_ADDR("bpf_fentry_test5", addrs[4]); 111 GET_ADDR("bpf_fentry_test6", addrs[5]); 112 GET_ADDR("bpf_fentry_test7", addrs[6]); 113 GET_ADDR("bpf_fentry_test8", addrs[7]); 114 115 opts.kprobe_multi.addrs = (const unsigned long*) addrs; 116 opts.kprobe_multi.cnt = ARRAY_SIZE(addrs); 117 test_link_api(&opts); 118 } 119 120 static void test_link_api_syms(void) 121 { 122 LIBBPF_OPTS(bpf_link_create_opts, opts); 123 const char *syms[8] = { 124 "bpf_fentry_test1", 125 "bpf_fentry_test2", 126 "bpf_fentry_test3", 127 "bpf_fentry_test4", 128 "bpf_fentry_test5", 129 "bpf_fentry_test6", 130 "bpf_fentry_test7", 131 "bpf_fentry_test8", 132 }; 133 134 opts.kprobe_multi.syms = syms; 135 opts.kprobe_multi.cnt = ARRAY_SIZE(syms); 136 test_link_api(&opts); 137 } 138 139 static void 140 test_attach_api(const char *pattern, struct bpf_kprobe_multi_opts *opts) 141 { 142 struct bpf_link *link1 = NULL, *link2 = NULL; 143 struct kprobe_multi *skel = NULL; 144 145 skel = kprobe_multi__open_and_load(); 146 if (!ASSERT_OK_PTR(skel, "fentry_raw_skel_load")) 147 goto cleanup; 148 149 skel->bss->pid = getpid(); 150 link1 = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe_manual, 151 pattern, opts); 152 if (!ASSERT_OK_PTR(link1, "bpf_program__attach_kprobe_multi_opts")) 153 goto cleanup; 154 155 if (opts) { 156 opts->retprobe = true; 157 link2 = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kretprobe_manual, 158 pattern, opts); 159 if (!ASSERT_OK_PTR(link2, "bpf_program__attach_kprobe_multi_opts")) 160 goto cleanup; 161 } 162 163 kprobe_multi_test_run(skel, !!opts); 164 165 cleanup: 166 bpf_link__destroy(link2); 167 bpf_link__destroy(link1); 168 kprobe_multi__destroy(skel); 169 } 170 171 static void test_attach_api_pattern(void) 172 { 173 LIBBPF_OPTS(bpf_kprobe_multi_opts, opts); 174 175 test_attach_api("bpf_fentry_test*", &opts); 176 test_attach_api("bpf_fentry_test?", NULL); 177 } 178 179 static void test_attach_api_addrs(void) 180 { 181 LIBBPF_OPTS(bpf_kprobe_multi_opts, opts); 182 unsigned long long addrs[8]; 183 184 GET_ADDR("bpf_fentry_test1", addrs[0]); 185 GET_ADDR("bpf_fentry_test2", addrs[1]); 186 GET_ADDR("bpf_fentry_test3", addrs[2]); 187 GET_ADDR("bpf_fentry_test4", addrs[3]); 188 GET_ADDR("bpf_fentry_test5", addrs[4]); 189 GET_ADDR("bpf_fentry_test6", addrs[5]); 190 GET_ADDR("bpf_fentry_test7", addrs[6]); 191 GET_ADDR("bpf_fentry_test8", addrs[7]); 192 193 opts.addrs = (const unsigned long *) addrs; 194 opts.cnt = ARRAY_SIZE(addrs); 195 test_attach_api(NULL, &opts); 196 } 197 198 static void test_attach_api_syms(void) 199 { 200 LIBBPF_OPTS(bpf_kprobe_multi_opts, opts); 201 const char *syms[8] = { 202 "bpf_fentry_test1", 203 "bpf_fentry_test2", 204 "bpf_fentry_test3", 205 "bpf_fentry_test4", 206 "bpf_fentry_test5", 207 "bpf_fentry_test6", 208 "bpf_fentry_test7", 209 "bpf_fentry_test8", 210 }; 211 212 opts.syms = syms; 213 opts.cnt = ARRAY_SIZE(syms); 214 test_attach_api(NULL, &opts); 215 } 216 217 static void test_attach_api_fails(void) 218 { 219 LIBBPF_OPTS(bpf_kprobe_multi_opts, opts); 220 struct kprobe_multi *skel = NULL; 221 struct bpf_link *link = NULL; 222 unsigned long long addrs[2]; 223 const char *syms[2] = { 224 "bpf_fentry_test1", 225 "bpf_fentry_test2", 226 }; 227 __u64 cookies[2]; 228 int saved_error; 229 230 addrs[0] = ksym_get_addr("bpf_fentry_test1"); 231 addrs[1] = ksym_get_addr("bpf_fentry_test2"); 232 233 if (!ASSERT_FALSE(!addrs[0] || !addrs[1], "ksym_get_addr")) 234 goto cleanup; 235 236 skel = kprobe_multi__open_and_load(); 237 if (!ASSERT_OK_PTR(skel, "fentry_raw_skel_load")) 238 goto cleanup; 239 240 skel->bss->pid = getpid(); 241 242 /* fail_1 - pattern and opts NULL */ 243 link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe_manual, 244 NULL, NULL); 245 saved_error = -errno; 246 if (!ASSERT_ERR_PTR(link, "fail_1")) 247 goto cleanup; 248 249 if (!ASSERT_EQ(saved_error, -EINVAL, "fail_1_error")) 250 goto cleanup; 251 252 /* fail_2 - both addrs and syms set */ 253 opts.addrs = (const unsigned long *) addrs; 254 opts.syms = syms; 255 opts.cnt = ARRAY_SIZE(syms); 256 opts.cookies = NULL; 257 258 link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe_manual, 259 NULL, &opts); 260 saved_error = -errno; 261 if (!ASSERT_ERR_PTR(link, "fail_2")) 262 goto cleanup; 263 264 if (!ASSERT_EQ(saved_error, -EINVAL, "fail_2_error")) 265 goto cleanup; 266 267 /* fail_3 - pattern and addrs set */ 268 opts.addrs = (const unsigned long *) addrs; 269 opts.syms = NULL; 270 opts.cnt = ARRAY_SIZE(syms); 271 opts.cookies = NULL; 272 273 link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe_manual, 274 "ksys_*", &opts); 275 saved_error = -errno; 276 if (!ASSERT_ERR_PTR(link, "fail_3")) 277 goto cleanup; 278 279 if (!ASSERT_EQ(saved_error, -EINVAL, "fail_3_error")) 280 goto cleanup; 281 282 /* fail_4 - pattern and cnt set */ 283 opts.addrs = NULL; 284 opts.syms = NULL; 285 opts.cnt = ARRAY_SIZE(syms); 286 opts.cookies = NULL; 287 288 link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe_manual, 289 "ksys_*", &opts); 290 saved_error = -errno; 291 if (!ASSERT_ERR_PTR(link, "fail_4")) 292 goto cleanup; 293 294 if (!ASSERT_EQ(saved_error, -EINVAL, "fail_4_error")) 295 goto cleanup; 296 297 /* fail_5 - pattern and cookies */ 298 opts.addrs = NULL; 299 opts.syms = NULL; 300 opts.cnt = 0; 301 opts.cookies = cookies; 302 303 link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe_manual, 304 "ksys_*", &opts); 305 saved_error = -errno; 306 if (!ASSERT_ERR_PTR(link, "fail_5")) 307 goto cleanup; 308 309 if (!ASSERT_EQ(saved_error, -EINVAL, "fail_5_error")) 310 goto cleanup; 311 312 /* fail_6 - abnormal cnt */ 313 opts.addrs = (const unsigned long *) addrs; 314 opts.syms = NULL; 315 opts.cnt = INT_MAX; 316 opts.cookies = NULL; 317 318 link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe_manual, 319 NULL, &opts); 320 saved_error = -errno; 321 if (!ASSERT_ERR_PTR(link, "fail_6")) 322 goto cleanup; 323 324 if (!ASSERT_EQ(saved_error, -E2BIG, "fail_6_error")) 325 goto cleanup; 326 327 cleanup: 328 bpf_link__destroy(link); 329 kprobe_multi__destroy(skel); 330 } 331 332 static void test_session_skel_api(void) 333 { 334 struct kprobe_multi_session *skel = NULL; 335 LIBBPF_OPTS(bpf_kprobe_multi_opts, opts); 336 LIBBPF_OPTS(bpf_test_run_opts, topts); 337 struct bpf_link *link = NULL; 338 int i, err, prog_fd; 339 340 skel = kprobe_multi_session__open_and_load(); 341 if (!ASSERT_OK_PTR(skel, "kprobe_multi_session__open_and_load")) 342 return; 343 344 skel->bss->pid = getpid(); 345 346 err = kprobe_multi_session__attach(skel); 347 if (!ASSERT_OK(err, " kprobe_multi_session__attach")) 348 goto cleanup; 349 350 prog_fd = bpf_program__fd(skel->progs.trigger); 351 err = bpf_prog_test_run_opts(prog_fd, &topts); 352 ASSERT_OK(err, "test_run"); 353 ASSERT_EQ(topts.retval, 0, "test_run"); 354 355 /* bpf_fentry_test1-4 trigger return probe, result is 2 */ 356 for (i = 0; i < 4; i++) 357 ASSERT_EQ(skel->bss->kprobe_session_result[i], 2, "kprobe_session_result"); 358 359 /* bpf_fentry_test5-8 trigger only entry probe, result is 1 */ 360 for (i = 4; i < 8; i++) 361 ASSERT_EQ(skel->bss->kprobe_session_result[i], 1, "kprobe_session_result"); 362 363 cleanup: 364 bpf_link__destroy(link); 365 kprobe_multi_session__destroy(skel); 366 } 367 368 static void test_session_cookie_skel_api(void) 369 { 370 struct kprobe_multi_session_cookie *skel = NULL; 371 LIBBPF_OPTS(bpf_kprobe_multi_opts, opts); 372 LIBBPF_OPTS(bpf_test_run_opts, topts); 373 struct bpf_link *link = NULL; 374 int err, prog_fd; 375 376 skel = kprobe_multi_session_cookie__open_and_load(); 377 if (!ASSERT_OK_PTR(skel, "fentry_raw_skel_load")) 378 return; 379 380 skel->bss->pid = getpid(); 381 382 err = kprobe_multi_session_cookie__attach(skel); 383 if (!ASSERT_OK(err, " kprobe_multi_wrapper__attach")) 384 goto cleanup; 385 386 prog_fd = bpf_program__fd(skel->progs.trigger); 387 err = bpf_prog_test_run_opts(prog_fd, &topts); 388 ASSERT_OK(err, "test_run"); 389 ASSERT_EQ(topts.retval, 0, "test_run"); 390 391 ASSERT_EQ(skel->bss->test_kprobe_1_result, 1, "test_kprobe_1_result"); 392 ASSERT_EQ(skel->bss->test_kprobe_2_result, 2, "test_kprobe_2_result"); 393 ASSERT_EQ(skel->bss->test_kprobe_3_result, 3, "test_kprobe_3_result"); 394 395 cleanup: 396 bpf_link__destroy(link); 397 kprobe_multi_session_cookie__destroy(skel); 398 } 399 400 static size_t symbol_hash(long key, void *ctx __maybe_unused) 401 { 402 return str_hash((const char *) key); 403 } 404 405 static bool symbol_equal(long key1, long key2, void *ctx __maybe_unused) 406 { 407 return strcmp((const char *) key1, (const char *) key2) == 0; 408 } 409 410 static bool is_invalid_entry(char *buf, bool kernel) 411 { 412 if (kernel && strchr(buf, '[')) 413 return true; 414 if (!kernel && !strchr(buf, '[')) 415 return true; 416 return false; 417 } 418 419 static bool skip_entry(char *name) 420 { 421 /* 422 * We attach to almost all kernel functions and some of them 423 * will cause 'suspicious RCU usage' when fprobe is attached 424 * to them. Filter out the current culprits - arch_cpu_idle 425 * default_idle and rcu_* functions. 426 */ 427 if (!strcmp(name, "arch_cpu_idle")) 428 return true; 429 if (!strcmp(name, "default_idle")) 430 return true; 431 if (!strncmp(name, "rcu_", 4)) 432 return true; 433 if (!strcmp(name, "bpf_dispatcher_xdp_func")) 434 return true; 435 if (!strncmp(name, "__ftrace_invalid_address__", 436 sizeof("__ftrace_invalid_address__") - 1)) 437 return true; 438 return false; 439 } 440 441 /* Do comparision by ignoring '.llvm.<hash>' suffixes. */ 442 static int compare_name(const char *name1, const char *name2) 443 { 444 const char *res1, *res2; 445 int len1, len2; 446 447 res1 = strstr(name1, ".llvm."); 448 res2 = strstr(name2, ".llvm."); 449 len1 = res1 ? res1 - name1 : strlen(name1); 450 len2 = res2 ? res2 - name2 : strlen(name2); 451 452 if (len1 == len2) 453 return strncmp(name1, name2, len1); 454 if (len1 < len2) 455 return strncmp(name1, name2, len1) <= 0 ? -1 : 1; 456 return strncmp(name1, name2, len2) >= 0 ? 1 : -1; 457 } 458 459 static int load_kallsyms_compare(const void *p1, const void *p2) 460 { 461 return compare_name(((const struct ksym *)p1)->name, ((const struct ksym *)p2)->name); 462 } 463 464 static int search_kallsyms_compare(const void *p1, const struct ksym *p2) 465 { 466 return compare_name(p1, p2->name); 467 } 468 469 static int get_syms(char ***symsp, size_t *cntp, bool kernel) 470 { 471 size_t cap = 0, cnt = 0; 472 char *name = NULL, *ksym_name, **syms = NULL; 473 struct hashmap *map; 474 struct ksyms *ksyms; 475 struct ksym *ks; 476 char buf[256]; 477 FILE *f; 478 int err = 0; 479 480 ksyms = load_kallsyms_custom_local(load_kallsyms_compare); 481 if (!ASSERT_OK_PTR(ksyms, "load_kallsyms_custom_local")) 482 return -EINVAL; 483 484 /* 485 * The available_filter_functions contains many duplicates, 486 * but other than that all symbols are usable in kprobe multi 487 * interface. 488 * Filtering out duplicates by using hashmap__add, which won't 489 * add existing entry. 490 */ 491 492 if (access("/sys/kernel/tracing/trace", F_OK) == 0) 493 f = fopen("/sys/kernel/tracing/available_filter_functions", "r"); 494 else 495 f = fopen("/sys/kernel/debug/tracing/available_filter_functions", "r"); 496 497 if (!f) 498 return -EINVAL; 499 500 map = hashmap__new(symbol_hash, symbol_equal, NULL); 501 if (IS_ERR(map)) { 502 err = libbpf_get_error(map); 503 goto error; 504 } 505 506 while (fgets(buf, sizeof(buf), f)) { 507 if (is_invalid_entry(buf, kernel)) 508 continue; 509 510 free(name); 511 if (sscanf(buf, "%ms$*[^\n]\n", &name) != 1) 512 continue; 513 if (skip_entry(name)) 514 continue; 515 516 ks = search_kallsyms_custom_local(ksyms, name, search_kallsyms_compare); 517 if (!ks) { 518 err = -EINVAL; 519 goto error; 520 } 521 522 ksym_name = ks->name; 523 err = hashmap__add(map, ksym_name, 0); 524 if (err == -EEXIST) { 525 err = 0; 526 continue; 527 } 528 if (err) 529 goto error; 530 531 err = libbpf_ensure_mem((void **) &syms, &cap, 532 sizeof(*syms), cnt + 1); 533 if (err) 534 goto error; 535 536 syms[cnt++] = ksym_name; 537 } 538 539 *symsp = syms; 540 *cntp = cnt; 541 542 error: 543 free(name); 544 fclose(f); 545 hashmap__free(map); 546 if (err) 547 free(syms); 548 return err; 549 } 550 551 static int get_addrs(unsigned long **addrsp, size_t *cntp, bool kernel) 552 { 553 unsigned long *addr, *addrs, *tmp_addrs; 554 int err = 0, max_cnt, inc_cnt; 555 char *name = NULL; 556 size_t cnt = 0; 557 char buf[256]; 558 FILE *f; 559 560 if (access("/sys/kernel/tracing/trace", F_OK) == 0) 561 f = fopen("/sys/kernel/tracing/available_filter_functions_addrs", "r"); 562 else 563 f = fopen("/sys/kernel/debug/tracing/available_filter_functions_addrs", "r"); 564 565 if (!f) 566 return -ENOENT; 567 568 /* In my local setup, the number of entries is 50k+ so Let us initially 569 * allocate space to hold 64k entries. If 64k is not enough, incrementally 570 * increase 1k each time. 571 */ 572 max_cnt = 65536; 573 inc_cnt = 1024; 574 addrs = malloc(max_cnt * sizeof(long)); 575 if (addrs == NULL) { 576 err = -ENOMEM; 577 goto error; 578 } 579 580 while (fgets(buf, sizeof(buf), f)) { 581 if (is_invalid_entry(buf, kernel)) 582 continue; 583 584 free(name); 585 if (sscanf(buf, "%p %ms$*[^\n]\n", &addr, &name) != 2) 586 continue; 587 if (skip_entry(name)) 588 continue; 589 590 if (cnt == max_cnt) { 591 max_cnt += inc_cnt; 592 tmp_addrs = realloc(addrs, max_cnt); 593 if (!tmp_addrs) { 594 err = -ENOMEM; 595 goto error; 596 } 597 addrs = tmp_addrs; 598 } 599 600 addrs[cnt++] = (unsigned long)addr; 601 } 602 603 *addrsp = addrs; 604 *cntp = cnt; 605 606 error: 607 free(name); 608 fclose(f); 609 if (err) 610 free(addrs); 611 return err; 612 } 613 614 static void do_bench_test(struct kprobe_multi_empty *skel, struct bpf_kprobe_multi_opts *opts) 615 { 616 long attach_start_ns, attach_end_ns; 617 long detach_start_ns, detach_end_ns; 618 double attach_delta, detach_delta; 619 struct bpf_link *link = NULL; 620 621 attach_start_ns = get_time_ns(); 622 link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe_empty, 623 NULL, opts); 624 attach_end_ns = get_time_ns(); 625 626 if (!ASSERT_OK_PTR(link, "bpf_program__attach_kprobe_multi_opts")) 627 return; 628 629 detach_start_ns = get_time_ns(); 630 bpf_link__destroy(link); 631 detach_end_ns = get_time_ns(); 632 633 attach_delta = (attach_end_ns - attach_start_ns) / 1000000000.0; 634 detach_delta = (detach_end_ns - detach_start_ns) / 1000000000.0; 635 636 printf("%s: found %lu functions\n", __func__, opts->cnt); 637 printf("%s: attached in %7.3lfs\n", __func__, attach_delta); 638 printf("%s: detached in %7.3lfs\n", __func__, detach_delta); 639 } 640 641 static void test_kprobe_multi_bench_attach(bool kernel) 642 { 643 LIBBPF_OPTS(bpf_kprobe_multi_opts, opts); 644 struct kprobe_multi_empty *skel = NULL; 645 char **syms = NULL; 646 size_t cnt = 0; 647 648 if (!ASSERT_OK(get_syms(&syms, &cnt, kernel), "get_syms")) 649 return; 650 651 skel = kprobe_multi_empty__open_and_load(); 652 if (!ASSERT_OK_PTR(skel, "kprobe_multi_empty__open_and_load")) 653 goto cleanup; 654 655 opts.syms = (const char **) syms; 656 opts.cnt = cnt; 657 658 do_bench_test(skel, &opts); 659 660 cleanup: 661 kprobe_multi_empty__destroy(skel); 662 if (syms) 663 free(syms); 664 } 665 666 static void test_kprobe_multi_bench_attach_addr(bool kernel) 667 { 668 LIBBPF_OPTS(bpf_kprobe_multi_opts, opts); 669 struct kprobe_multi_empty *skel = NULL; 670 unsigned long *addrs = NULL; 671 size_t cnt = 0; 672 int err; 673 674 err = get_addrs(&addrs, &cnt, kernel); 675 if (err == -ENOENT) { 676 test__skip(); 677 return; 678 } 679 680 if (!ASSERT_OK(err, "get_addrs")) 681 return; 682 683 skel = kprobe_multi_empty__open_and_load(); 684 if (!ASSERT_OK_PTR(skel, "kprobe_multi_empty__open_and_load")) 685 goto cleanup; 686 687 opts.addrs = addrs; 688 opts.cnt = cnt; 689 690 do_bench_test(skel, &opts); 691 692 cleanup: 693 kprobe_multi_empty__destroy(skel); 694 free(addrs); 695 } 696 697 static void test_attach_override(void) 698 { 699 struct kprobe_multi_override *skel = NULL; 700 struct bpf_link *link = NULL; 701 702 skel = kprobe_multi_override__open_and_load(); 703 if (!ASSERT_OK_PTR(skel, "kprobe_multi_empty__open_and_load")) 704 goto cleanup; 705 706 /* The test_override calls bpf_override_return so it should fail 707 * to attach to bpf_fentry_test1 function, which is not on error 708 * injection list. 709 */ 710 link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_override, 711 "bpf_fentry_test1", NULL); 712 if (!ASSERT_ERR_PTR(link, "override_attached_bpf_fentry_test1")) { 713 bpf_link__destroy(link); 714 goto cleanup; 715 } 716 717 /* The should_fail_bio function is on error injection list, 718 * attach should succeed. 719 */ 720 link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_override, 721 "should_fail_bio", NULL); 722 if (!ASSERT_OK_PTR(link, "override_attached_should_fail_bio")) 723 goto cleanup; 724 725 bpf_link__destroy(link); 726 727 cleanup: 728 kprobe_multi_override__destroy(skel); 729 } 730 731 void serial_test_kprobe_multi_bench_attach(void) 732 { 733 if (test__start_subtest("kernel")) 734 test_kprobe_multi_bench_attach(true); 735 if (test__start_subtest("modules")) 736 test_kprobe_multi_bench_attach(false); 737 if (test__start_subtest("kernel")) 738 test_kprobe_multi_bench_attach_addr(true); 739 if (test__start_subtest("modules")) 740 test_kprobe_multi_bench_attach_addr(false); 741 } 742 743 void test_kprobe_multi_test(void) 744 { 745 if (!ASSERT_OK(load_kallsyms(), "load_kallsyms")) 746 return; 747 748 if (test__start_subtest("skel_api")) 749 test_skel_api(); 750 if (test__start_subtest("link_api_addrs")) 751 test_link_api_syms(); 752 if (test__start_subtest("link_api_syms")) 753 test_link_api_addrs(); 754 if (test__start_subtest("attach_api_pattern")) 755 test_attach_api_pattern(); 756 if (test__start_subtest("attach_api_addrs")) 757 test_attach_api_addrs(); 758 if (test__start_subtest("attach_api_syms")) 759 test_attach_api_syms(); 760 if (test__start_subtest("attach_api_fails")) 761 test_attach_api_fails(); 762 if (test__start_subtest("attach_override")) 763 test_attach_override(); 764 if (test__start_subtest("session")) 765 test_session_skel_api(); 766 if (test__start_subtest("session_cookie")) 767 test_session_cookie_skel_api(); 768 RUN_TESTS(kprobe_multi_verifier); 769 } 770